From: Wang Yinfeng &lt;wangyinfeng(a)phytium.com.cn&gt; Phytium S2500 adjusts the GIC's implementation to support multi-socket system designs. This patch adds the driver of this new implementation while keeping the kernel binary compatible with other ARM servers in the ecosystem. Signed-off-by: Wang Yinfeng &lt;wangyinfeng(a)phytium.com.cn&gt; --- arch/arm64/Kconfig.platforms | 6 + drivers/irqchip/Kconfig | 9 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic-phytium-2500-its.c | 5524 ++++++++++++++++++++++++++ drivers/irqchip/irq-gic-phytium-2500.c | 2505 ++++++++++++ include/acpi/actbl2.h | 3 +- include/linux/irqchip/arm-gic-phytium-2500.h | 725 ++++ 7 files changed, 8772 insertions(+), 1 deletion(-) create mode 100644 drivers/irqchip/irq-gic-phytium-2500-its.c create mode 100644 drivers/irqchip/irq-gic-phytium-2500.c create mode 100644 include/linux/irqchip/arm-gic-phytium-2500.h diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index 5c4ac1c..dd6b746 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -199,6 +199,12 @@ config ARCH_MXC This enables support for the ARMv8 based SoCs in the NXP i.MX family. +config ARCH_PHYTIUM + bool "Phytium SoC Family" + help + This enables support for Phytium ARMv8 SoC family. + select ARM_GIC_PHYTIUM_2500 + config ARCH_QCOM bool "Qualcomm Platforms" select GPIOLIB diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 2aa79c3..2cf1f7b 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -56,6 +56,15 @@ config ARM_GIC_V3_ITS_FSL_MC depends on FSL_MC_BUS default ARM_GIC_V3_ITS +config ARM_GIC_PHYTIUM_2500 + bool + select IRQ_DOMAIN + select GENERIC_IRQ_MULTI_HANDLER + select IRQ_DOMAIN_HIERARCHY + select PARTITION_PERCPU + select GENERIC_IRQ_EFFECTIVE_AFF_MASK + select GENERIC_MSI_IRQ_DOMAIN + config ARM_NVIC bool select IRQ_DOMAIN_HIERARCHY diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 94c2885..ed171c6 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-v3-mbi.o irq-gic-common.o obj-$(CONFIG_ARM_GIC_V3_ITS) += irq-gic-v3-its.o irq-gic-v3-its-platform-msi.o irq-gic-v4.o obj-$(CONFIG_ARM_GIC_V3_ITS_PCI) += irq-gic-v3-its-pci-msi.o obj-$(CONFIG_ARM_GIC_V3_ITS_FSL_MC) += irq-gic-v3-its-fsl-mc-msi.o +obj-$(CONFIG_ARM_GIC_PHYTIUM_2500) += irq-gic-phytium-2500.o irq-gic-phytium-2500-its.o obj-$(CONFIG_PARTITION_PERCPU) += irq-partition-percpu.o obj-$(CONFIG_HISILICON_IRQ_MBIGEN) += irq-mbigen.o obj-$(CONFIG_ARM_NVIC) += irq-nvic.o diff --git a/drivers/irqchip/irq-gic-phytium-2500-its.c b/drivers/irqchip/irq-gic-phytium-2500-its.c new file mode 100644 index 0000000..f78510e --- /dev/null +++ b/drivers/irqchip/irq-gic-phytium-2500-its.c @@ -0,0 +1,5522 @@ +/* + * Copyright (C) 2020 Phytium Corporation. + * Author: Wang Yinfeng &lt;wangyinfeng(a)phytium.com.cn&gt; + * Chen Baozi &lt;chenbaozi(a)phytium.com.cn&gt; + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/acpi.h> +#include <linux/acpi_iort.h> +#include <linux/bitfield.h> +#include <linux/bitmap.h> +#include <linux/cpu.h> +#include <linux/crash_dump.h> +#include <linux/delay.h> +#include <linux/dma-iommu.h> +#include <linux/efi.h> +#include <linux/interrupt.h> +#include <linux/iopoll.h> +#include <linux/irqdomain.h> +#include <linux/list.h> +#include <linux/log2.h> +#include <linux/memblock.h> +#include <linux/mm.h> +#include <linux/msi.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_pci.h> +#include <linux/of_platform.h> +#include <linux/percpu.h> +#include <linux/slab.h> +#include <linux/syscore_ops.h> + +#include <linux/irqchip.h> +#include <linux/irqchip/arm-gic-phytium-2500.h> +#include <linux/irqchip/arm-gic-v4.h> + +#include <asm/cputype.h> +#include <asm/exception.h> + +#include "irq-gic-common.h" + +#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) +#define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) +#define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2) + +#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0) +#define RDIST_FLAGS_RD_TABLES_PREALLOCATED (1 << 1) + +static u32 lpi_id_bits; + +/* + * We allocate memory for PROPBASE to cover 2 ^ lpi_id_bits LPIs to + * deal with (one configuration byte per interrupt). PENDBASE has to + * be 64kB aligned (one bit per LPI, plus 8192 bits for SPI/PPI/SGI). + */ +#define LPI_NRBITS lpi_id_bits +#define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K) +#define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K) + +#define LPI_PROP_DEFAULT_PRIO GICD_INT_DEF_PRI + +/* + * Collection structure - just an ID, and a redistributor address to + * ping. We use one per CPU as a bag of interrupts assigned to this + * CPU. + */ +struct its_collection { + u64 target_address; + u16 col_id; +}; + +/* + * The ITS_BASER structure - contains memory information, cached + * value of BASER register configuration and ITS page size. + */ +struct its_baser { + void *base; + u64 val; + u32 order; + u32 psz; +}; + +struct its_device; + +/* + * The ITS structure - contains most of the infrastructure, with the + * top-level MSI domain, the command queue, the collections, and the + * list of devices writing to it. + * + * dev_alloc_lock has to be taken for device allocations, while the + * spinlock must be taken to parse data structures such as the device + * list. + */ +struct its_node { + raw_spinlock_t lock; + struct mutex dev_alloc_lock; + struct list_head entry; + void __iomem *base; + void __iomem *sgir_base; + phys_addr_t phys_base; + struct its_cmd_block *cmd_base; + struct its_cmd_block *cmd_write; + struct its_baser tables[GITS_BASER_NR_REGS]; + struct its_collection *collections; + struct fwnode_handle *fwnode_handle; + u64 (*get_msi_base)(struct its_device *its_dev); + u64 typer; + u64 cbaser_save; + u32 ctlr_save; + u32 mpidr; + struct list_head its_device_list; + u64 flags; + unsigned long list_nr; + int numa_node; + unsigned int msi_domain_flags; + u32 pre_its_base; /* for Socionext Synquacer */ + int vlpi_redist_offset; +}; + +#define is_v4(its) (!!((its)->typer & GITS_TYPER_VLPIS)) +#define is_v4_1(its) (!!((its)->typer & GITS_TYPER_VMAPP)) +#define device_ids(its) (FIELD_GET(GITS_TYPER_DEVBITS, (its)->typer) + 1) + +#define ITS_ITT_ALIGN SZ_256 + +/* The maximum number of VPEID bits supported by VLPI commands */ +#define ITS_MAX_VPEID_BITS \ + ({ \ + int nvpeid = 16; \ + if (gic_rdists->has_rvpeid && \ + gic_rdists->gicd_typer2 & GICD_TYPER2_VIL) \ + nvpeid = 1 + (gic_rdists->gicd_typer2 & \ + GICD_TYPER2_VID); \ + \ + nvpeid; \ + }) +#define ITS_MAX_VPEID (1 << (ITS_MAX_VPEID_BITS)) + +/* Convert page order to size in bytes */ +#define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o)) + +struct event_lpi_map { + unsigned long *lpi_map; + u16 *col_map; + irq_hw_number_t lpi_base; + int nr_lpis; + raw_spinlock_t vlpi_lock; + struct its_vm *vm; + struct its_vlpi_map *vlpi_maps; + int nr_vlpis; +}; + +/* + * The ITS view of a device - belongs to an ITS, owns an interrupt + * translation table, and a list of interrupts. If it some of its + * LPIs are injected into a guest (GICv4), the event_map.vm field + * indicates which one. + */ +struct its_device { + struct list_head entry; + struct its_node *its; + struct event_lpi_map event_map; + void *itt; + u32 nr_ites; + u32 device_id; + bool shared; +}; + +static struct { + raw_spinlock_t lock; + struct its_device *dev; + struct its_vpe **vpes; + int next_victim; +} vpe_proxy; + +struct cpu_lpi_count { + atomic_t managed; + atomic_t unmanaged; +}; + +static DEFINE_PER_CPU(struct cpu_lpi_count, cpu_lpi_count); + +static LIST_HEAD(its_nodes); +static DEFINE_RAW_SPINLOCK(its_lock); +static struct rdists *gic_rdists; +static struct irq_domain *its_parent; + +static unsigned long its_list_map; +static u16 vmovp_seq_num; +static DEFINE_RAW_SPINLOCK(vmovp_lock); + +static DEFINE_IDA(its_vpeid_ida); + +#define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) +#define gic_data_rdist_cpu(cpu) (per_cpu_ptr(gic_rdists->rdist, cpu)) +#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) +#define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) + +/* + * Skip ITSs that have no vLPIs mapped, unless we're on GICv4.1, as we + * always have vSGIs mapped. + */ +static bool require_its_list_vmovp(struct its_vm *vm, struct its_node *its) +{ + return (gic_rdists->has_rvpeid || vm->vlpi_count[its->list_nr]); +} + +static u16 get_its_list(struct its_vm *vm) +{ + struct its_node *its; + unsigned long its_list = 0; + + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4(its)) + continue; + + if (require_its_list_vmovp(vm, its)) + __set_bit(its->list_nr, &its_list); + } + + return (u16)its_list; +} + +static inline u32 its_get_event_id(struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + return d->hwirq - its_dev->event_map.lpi_base; +} + +static struct its_collection *dev_event_to_col(struct its_device *its_dev, + u32 event) +{ + struct its_node *its = its_dev->its; + + return its->collections + its_dev->event_map.col_map[event]; +} + +static struct its_vlpi_map *dev_event_to_vlpi_map(struct its_device *its_dev, + u32 event) +{ + if (WARN_ON_ONCE(event >= its_dev->event_map.nr_lpis)) + return NULL; + + return &its_dev->event_map.vlpi_maps[event]; +} + +static struct its_vlpi_map *get_vlpi_map(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) { + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + return dev_event_to_vlpi_map(its_dev, event); + } + + return NULL; +} + +static int vpe_to_cpuid_lock(struct its_vpe *vpe, unsigned long *flags) +{ + raw_spin_lock_irqsave(&vpe->vpe_lock, *flags); + return vpe->col_idx; +} + +static void vpe_to_cpuid_unlock(struct its_vpe *vpe, unsigned long flags) +{ + raw_spin_unlock_irqrestore(&vpe->vpe_lock, flags); +} + +static int irq_to_cpuid_lock(struct irq_data *d, unsigned long *flags) +{ + struct its_vlpi_map *map = get_vlpi_map(d); + int cpu; + + if (map) { + cpu = vpe_to_cpuid_lock(map->vpe, flags); + } else { + /* Physical LPIs are already locked via the irq_desc lock */ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + cpu = its_dev->event_map.col_map[its_get_event_id(d)]; + /* Keep GCC quiet... */ + *flags = 0; + } + + return cpu; +} + +static void irq_to_cpuid_unlock(struct irq_data *d, unsigned long flags) +{ + struct its_vlpi_map *map = get_vlpi_map(d); + + if (map) + vpe_to_cpuid_unlock(map->vpe, flags); +} + +static struct its_collection *valid_col(struct its_collection *col) +{ + if (WARN_ON_ONCE(col->target_address & GENMASK_ULL(15, 0))) + return NULL; + + return col; +} + +static struct its_vpe *valid_vpe(struct its_node *its, struct its_vpe *vpe) +{ + if (valid_col(its->collections + vpe->col_idx)) + return vpe; + + return NULL; +} + +/* + * ITS command descriptors - parameters to be encoded in a command + * block. + */ +struct its_cmd_desc { + union { + struct { + struct its_device *dev; + u32 event_id; + } its_inv_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_clear_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_int_cmd; + + struct { + struct its_device *dev; + int valid; + } its_mapd_cmd; + + struct { + struct its_collection *col; + int valid; + } its_mapc_cmd; + + struct { + struct its_device *dev; + u32 phys_id; + u32 event_id; + } its_mapti_cmd; + + struct { + struct its_device *dev; + struct its_collection *col; + u32 event_id; + } its_movi_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_discard_cmd; + + struct { + struct its_collection *col; + } its_invall_cmd; + + struct { + struct its_vpe *vpe; + } its_vinvall_cmd; + + struct { + struct its_vpe *vpe; + struct its_collection *col; + bool valid; + } its_vmapp_cmd; + + struct { + struct its_vpe *vpe; + struct its_device *dev; + u32 virt_id; + u32 event_id; + bool db_enabled; + } its_vmapti_cmd; + + struct { + struct its_vpe *vpe; + struct its_device *dev; + u32 event_id; + bool db_enabled; + } its_vmovi_cmd; + + struct { + struct its_vpe *vpe; + struct its_collection *col; + u16 seq_num; + u16 its_list; + } its_vmovp_cmd; + + struct { + struct its_vpe *vpe; + } its_invdb_cmd; + + struct { + struct its_vpe *vpe; + u8 sgi; + u8 priority; + bool enable; + bool group; + bool clear; + } its_vsgi_cmd; + }; +}; + +/* + * The ITS command block, which is what the ITS actually parses. + */ +struct its_cmd_block { + union { + u64 raw_cmd[4]; + __le64 raw_cmd_le[4]; + }; +}; + +#define ITS_CMD_QUEUE_SZ SZ_64K +#define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) + +typedef struct its_collection *(*its_cmd_builder_t)(struct its_node *, + struct its_cmd_block *, + struct its_cmd_desc *); + +typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_node *, + struct its_cmd_block *, + struct its_cmd_desc *); + +static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) +{ + u64 mask = GENMASK_ULL(h, l); + *raw_cmd &= ~mask; + *raw_cmd |= (val << l) & mask; +} + +static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) +{ + its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); +} + +static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) +{ + its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); +} + +static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) +{ + its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); +} + +static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) +{ + its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); +} + +static void its_encode_size(struct its_cmd_block *cmd, u8 size) +{ + its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); +} + +static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) +{ + its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 51, 8); +} + +static void its_encode_valid(struct its_cmd_block *cmd, int valid) +{ + its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); +} + +static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) +{ + its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 51, 16); +} + +static void its_encode_collection(struct its_cmd_block *cmd, u16 col) +{ + its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); +} + +static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) +{ + its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); +} + +static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) +{ + its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); +} + +static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) +{ + its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); +} + +static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) +{ + its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); +} + +static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) +{ + its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); +} + +static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) +{ + its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); +} + +static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 51, 16); +} + +static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); +} + +static void its_encode_vconf_addr(struct its_cmd_block *cmd, u64 vconf_pa) +{ + its_mask_encode(&cmd->raw_cmd[0], vconf_pa >> 16, 51, 16); +} + +static void its_encode_alloc(struct its_cmd_block *cmd, bool alloc) +{ + its_mask_encode(&cmd->raw_cmd[0], alloc, 8, 8); +} + +static void its_encode_ptz(struct its_cmd_block *cmd, bool ptz) +{ + its_mask_encode(&cmd->raw_cmd[0], ptz, 9, 9); +} + +static void its_encode_vmapp_default_db(struct its_cmd_block *cmd, + u32 vpe_db_lpi) +{ + its_mask_encode(&cmd->raw_cmd[1], vpe_db_lpi, 31, 0); +} + +static void its_encode_vmovp_default_db(struct its_cmd_block *cmd, + u32 vpe_db_lpi) +{ + its_mask_encode(&cmd->raw_cmd[3], vpe_db_lpi, 31, 0); +} + +static void its_encode_db(struct its_cmd_block *cmd, bool db) +{ + its_mask_encode(&cmd->raw_cmd[2], db, 63, 63); +} + +static void its_encode_sgi_intid(struct its_cmd_block *cmd, u8 sgi) +{ + its_mask_encode(&cmd->raw_cmd[0], sgi, 35, 32); +} + +static void its_encode_sgi_priority(struct its_cmd_block *cmd, u8 prio) +{ + its_mask_encode(&cmd->raw_cmd[0], prio >> 4, 23, 20); +} + +static void its_encode_sgi_group(struct its_cmd_block *cmd, bool grp) +{ + its_mask_encode(&cmd->raw_cmd[0], grp, 10, 10); +} + +static void its_encode_sgi_clear(struct its_cmd_block *cmd, bool clr) +{ + its_mask_encode(&cmd->raw_cmd[0], clr, 9, 9); +} + +static void its_encode_sgi_enable(struct its_cmd_block *cmd, bool en) +{ + its_mask_encode(&cmd->raw_cmd[0], en, 8, 8); +} + +static inline void its_fixup_cmd(struct its_cmd_block *cmd) +{ + /* Let's fixup BE commands */ + cmd->raw_cmd_le[0] = cpu_to_le64(cmd->raw_cmd[0]); + cmd->raw_cmd_le[1] = cpu_to_le64(cmd->raw_cmd[1]); + cmd->raw_cmd_le[2] = cpu_to_le64(cmd->raw_cmd[2]); + cmd->raw_cmd_le[3] = cpu_to_le64(cmd->raw_cmd[3]); +} + +static struct its_collection *its_build_mapd_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + unsigned long itt_addr; + u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); + + itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); + itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); + + its_encode_cmd(cmd, GITS_CMD_MAPD); + its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); + its_encode_size(cmd, size - 1); + its_encode_itt(cmd, itt_addr); + its_encode_valid(cmd, desc->its_mapd_cmd.valid); + + its_fixup_cmd(cmd); + + return NULL; +} + +static struct its_collection *its_build_mapc_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_MAPC); + its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); + its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); + its_encode_valid(cmd, desc->its_mapc_cmd.valid); + + its_fixup_cmd(cmd); + + return desc->its_mapc_cmd.col; +} + +static struct its_collection *its_build_mapti_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_mapti_cmd.dev, + desc->its_mapti_cmd.event_id); + col->col_id = col->col_id % 64; + + its_encode_cmd(cmd, GITS_CMD_MAPTI); + its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); + its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); + its_encode_collection(cmd, col->col_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_movi_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_movi_cmd.dev, + desc->its_movi_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_MOVI); + its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_movi_cmd.event_id); + its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_discard_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_discard_cmd.dev, + desc->its_discard_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_DISCARD); + its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_discard_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_inv_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_inv_cmd.dev, + desc->its_inv_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INV); + its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_inv_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_int_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_int_cmd.dev, + desc->its_int_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INT); + its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_int_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_clear_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_clear_cmd.dev, + desc->its_clear_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_CLEAR); + its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_clear_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_invall_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_INVALL); + its_encode_collection(cmd, desc->its_invall_cmd.col->col_id); + + its_fixup_cmd(cmd); + + return NULL; +} + +static struct its_vpe *its_build_vinvall_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_VINVALL); + its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vinvall_cmd.vpe); +} + +static struct its_vpe *its_build_vmapp_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + unsigned long vpt_addr, vconf_addr; + u64 target; + bool alloc; + + its_encode_cmd(cmd, GITS_CMD_VMAPP); + its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); + its_encode_valid(cmd, desc->its_vmapp_cmd.valid); + + if (!desc->its_vmapp_cmd.valid) { + if (is_v4_1(its)) { + alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count); + its_encode_alloc(cmd, alloc); + } + + goto out; + } + + vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); + target = desc->its_vmapp_cmd.col->target_address + its->vlpi_redist_offset; + + its_encode_target(cmd, target); + its_encode_vpt_addr(cmd, vpt_addr); + its_encode_vpt_size(cmd, LPI_NRBITS - 1); + + if (!is_v4_1(its)) + goto out; + + vconf_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->its_vm->vprop_page)); + + alloc = !atomic_fetch_inc(&desc->its_vmapp_cmd.vpe->vmapp_count); + + its_encode_alloc(cmd, alloc); + + /* We can only signal PTZ when alloc==1. Why do we have two bits? */ + its_encode_ptz(cmd, alloc); + its_encode_vconf_addr(cmd, vconf_addr); + its_encode_vmapp_default_db(cmd, desc->its_vmapp_cmd.vpe->vpe_db_lpi); + +out: + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmapp_cmd.vpe); +} + +static struct its_vpe *its_build_vmapti_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u32 db; + + if (!is_v4_1(its) && desc->its_vmapti_cmd.db_enabled) + db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; + else + db = 1023; + + its_encode_cmd(cmd, GITS_CMD_VMAPTI); + its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); + its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); + its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); + its_encode_db_phys_id(cmd, db); + its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmapti_cmd.vpe); +} + +static struct its_vpe *its_build_vmovi_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u32 db; + + if (!is_v4_1(its) && desc->its_vmovi_cmd.db_enabled) + db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; + else + db = 1023; + + its_encode_cmd(cmd, GITS_CMD_VMOVI); + its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); + its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); + its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); + its_encode_db_phys_id(cmd, db); + its_encode_db_valid(cmd, true); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmovi_cmd.vpe); +} + +static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u64 target; + + target = desc->its_vmovp_cmd.col->target_address + its->vlpi_redist_offset; + its_encode_cmd(cmd, GITS_CMD_VMOVP); + its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); + its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); + its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); + its_encode_target(cmd, target); + + if (is_v4_1(its)) { + its_encode_db(cmd, true); + its_encode_vmovp_default_db(cmd, desc->its_vmovp_cmd.vpe->vpe_db_lpi); + } + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmovp_cmd.vpe); +} + +static struct its_vpe *its_build_vinv_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_vlpi_map *map; + + map = dev_event_to_vlpi_map(desc->its_inv_cmd.dev, + desc->its_inv_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INV); + its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_inv_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, map->vpe); +} + +static struct its_vpe *its_build_vint_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_vlpi_map *map; + + map = dev_event_to_vlpi_map(desc->its_int_cmd.dev, + desc->its_int_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INT); + its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_int_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, map->vpe); +} + +static struct its_vpe *its_build_vclear_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_vlpi_map *map; + + map = dev_event_to_vlpi_map(desc->its_clear_cmd.dev, + desc->its_clear_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_CLEAR); + its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_clear_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, map->vpe); +} + +static struct its_vpe *its_build_invdb_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + if (WARN_ON(!is_v4_1(its))) + return NULL; + + its_encode_cmd(cmd, GITS_CMD_INVDB); + its_encode_vpeid(cmd, desc->its_invdb_cmd.vpe->vpe_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_invdb_cmd.vpe); +} + +static struct its_vpe *its_build_vsgi_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + if (WARN_ON(!is_v4_1(its))) + return NULL; + + its_encode_cmd(cmd, GITS_CMD_VSGI); + its_encode_vpeid(cmd, desc->its_vsgi_cmd.vpe->vpe_id); + its_encode_sgi_intid(cmd, desc->its_vsgi_cmd.sgi); + its_encode_sgi_priority(cmd, desc->its_vsgi_cmd.priority); + its_encode_sgi_group(cmd, desc->its_vsgi_cmd.group); + its_encode_sgi_clear(cmd, desc->its_vsgi_cmd.clear); + its_encode_sgi_enable(cmd, desc->its_vsgi_cmd.enable); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vsgi_cmd.vpe); +} + +static u64 its_cmd_ptr_to_offset(struct its_node *its, + struct its_cmd_block *ptr) +{ + return (ptr - its->cmd_base) * sizeof(*ptr); +} + +static int its_queue_full(struct its_node *its) +{ + int widx; + int ridx; + + widx = its->cmd_write - its->cmd_base; + ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); + + /* This is incredibly unlikely to happen, unless the ITS locks up. */ + if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) + return 1; + + return 0; +} + +static struct its_cmd_block *its_allocate_entry(struct its_node *its) +{ + struct its_cmd_block *cmd; + u32 count = 1000000; /* 1s! */ + + while (its_queue_full(its)) { + count--; + if (!count) { + pr_err_ratelimited("ITS queue not draining\n"); + return NULL; + } + cpu_relax(); + udelay(1); + } + + cmd = its->cmd_write++; + + /* Handle queue wrapping */ + if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) + its->cmd_write = its->cmd_base; + + /* Clear command */ + cmd->raw_cmd[0] = 0; + cmd->raw_cmd[1] = 0; + cmd->raw_cmd[2] = 0; + cmd->raw_cmd[3] = 0; + + return cmd; +} + +static struct its_cmd_block *its_post_commands(struct its_node *its) +{ + u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); + + writel_relaxed(wr, its->base + GITS_CWRITER); + + return its->cmd_write; +} + +static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) +{ + /* + * Make sure the commands written to memory are observable by + * the ITS. + */ + if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) + gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); + else + dsb(ishst); +} + +static int its_wait_for_range_completion(struct its_node *its, + u64 prev_idx, + struct its_cmd_block *to) +{ + u64 rd_idx, to_idx, linear_idx; + u32 count = 1000000; /* 1s! */ + + /* Linearize to_idx if the command set has wrapped around */ + to_idx = its_cmd_ptr_to_offset(its, to); + if (to_idx < prev_idx) + to_idx += ITS_CMD_QUEUE_SZ; + + linear_idx = prev_idx; + + while (1) { + s64 delta; + + rd_idx = readl_relaxed(its->base + GITS_CREADR); + + /* + * Compute the read pointer progress, taking the + * potential wrap-around into account. + */ + delta = rd_idx - prev_idx; + if (rd_idx < prev_idx) + delta += ITS_CMD_QUEUE_SZ; + + linear_idx += delta; + if (linear_idx >= to_idx) + break; + + count--; + if (!count) { + pr_err_ratelimited("ITS queue timeout (%llu %llu)\n", + to_idx, linear_idx); + return -1; + } + prev_idx = rd_idx; + cpu_relax(); + udelay(1); + } + + return 0; +} + +/* Warning, macro hell follows */ +#define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ +void name(struct its_node *its, \ + buildtype builder, \ + struct its_cmd_desc *desc) \ +{ \ + struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ + synctype *sync_obj; \ + unsigned long flags; \ + u64 rd_idx; \ + \ + raw_spin_lock_irqsave(&its->lock, flags); \ + \ + cmd = its_allocate_entry(its); \ + if (!cmd) { /* We're soooooo screewed... */ \ + raw_spin_unlock_irqrestore(&its->lock, flags); \ + return; \ + } \ + sync_obj = builder(its, cmd, desc); \ + its_flush_cmd(its, cmd); \ + \ + if (sync_obj) { \ + sync_cmd = its_allocate_entry(its); \ + if (!sync_cmd) \ + goto post; \ + \ + buildfn(its, sync_cmd, sync_obj); \ + its_flush_cmd(its, sync_cmd); \ + } \ + \ +post: \ + rd_idx = readl_relaxed(its->base + GITS_CREADR); \ + next_cmd = its_post_commands(its); \ + raw_spin_unlock_irqrestore(&its->lock, flags); \ + \ + if (its_wait_for_range_completion(its, rd_idx, next_cmd)) \ + pr_err_ratelimited("ITS cmd %ps failed\n", builder); \ +} + +static void its_build_sync_cmd(struct its_node *its, + struct its_cmd_block *sync_cmd, + struct its_collection *sync_col) +{ + its_encode_cmd(sync_cmd, GITS_CMD_SYNC); + its_encode_target(sync_cmd, sync_col->target_address); + + its_fixup_cmd(sync_cmd); +} + +static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, + struct its_collection, its_build_sync_cmd) + +static void its_build_vsync_cmd(struct its_node *its, + struct its_cmd_block *sync_cmd, + struct its_vpe *sync_vpe) +{ + its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); + its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); + + its_fixup_cmd(sync_cmd); +} + +static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, + struct its_vpe, its_build_vsync_cmd) + +static void its_send_int(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_int_cmd.dev = dev; + desc.its_int_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_int_cmd, &desc); +} + +static void its_send_clear(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_clear_cmd.dev = dev; + desc.its_clear_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_clear_cmd, &desc); +} + +static void its_send_inv(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_inv_cmd.dev = dev; + desc.its_inv_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_inv_cmd, &desc); +} + +static void its_send_mapd(struct its_device *dev, int valid) +{ + struct its_cmd_desc desc; + + desc.its_mapd_cmd.dev = dev; + desc.its_mapd_cmd.valid = !!valid; + + its_send_single_command(dev->its, its_build_mapd_cmd, &desc); +} + +static void its_send_mapc(struct its_node *its, struct its_collection *col, + int valid) +{ + struct its_cmd_desc desc; + + desc.its_mapc_cmd.col = col; + desc.its_mapc_cmd.valid = !!valid; + + its_send_single_command(its, its_build_mapc_cmd, &desc); +} + +static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_mapti_cmd.dev = dev; + desc.its_mapti_cmd.phys_id = irq_id; + desc.its_mapti_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_mapti_cmd, &desc); +} + +static void its_send_movi(struct its_device *dev, + struct its_collection *col, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_movi_cmd.dev = dev; + desc.its_movi_cmd.col = col; + desc.its_movi_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_movi_cmd, &desc); +} + +static void its_send_discard(struct its_device *dev, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_discard_cmd.dev = dev; + desc.its_discard_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_discard_cmd, &desc); +} + +static void its_send_invall(struct its_node *its, struct its_collection *col) +{ + struct its_cmd_desc desc; + + desc.its_invall_cmd.col = col; + + its_send_single_command(its, its_build_invall_cmd, &desc); +} + +static void its_send_vmapti(struct its_device *dev, u32 id) +{ + struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); + struct its_cmd_desc desc; + + desc.its_vmapti_cmd.vpe = map->vpe; + desc.its_vmapti_cmd.dev = dev; + desc.its_vmapti_cmd.virt_id = map->vintid; + desc.its_vmapti_cmd.event_id = id; + desc.its_vmapti_cmd.db_enabled = map->db_enabled; + + its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); +} + +static void its_send_vmovi(struct its_device *dev, u32 id) +{ + struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); + struct its_cmd_desc desc; + + desc.its_vmovi_cmd.vpe = map->vpe; + desc.its_vmovi_cmd.dev = dev; + desc.its_vmovi_cmd.event_id = id; + desc.its_vmovi_cmd.db_enabled = map->db_enabled; + + its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); +} + +static void its_send_vmapp(struct its_node *its, + struct its_vpe *vpe, bool valid) +{ + struct its_cmd_desc desc; + + desc.its_vmapp_cmd.vpe = vpe; + desc.its_vmapp_cmd.valid = valid; + desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; + + its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); +} + +static void its_send_vmovp(struct its_vpe *vpe) +{ + struct its_cmd_desc desc = {}; + struct its_node *its; + unsigned long flags; + int col_id = vpe->col_idx; + + desc.its_vmovp_cmd.vpe = vpe; + + if (!its_list_map) { + its = list_first_entry(&its_nodes, struct its_node, entry); + desc.its_vmovp_cmd.col = &its->collections[col_id]; + its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); + return; + } + + /* + * Yet another marvel of the architecture. If using the + * its_list "feature", we need to make sure that all ITSs + * receive all VMOVP commands in the same order. The only way + * to guarantee this is to make vmovp a serialization point. + * + * Wall <-- Head. + */ + raw_spin_lock_irqsave(&vmovp_lock, flags); + + desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; + desc.its_vmovp_cmd.its_list = get_its_list(vpe->its_vm); + + /* Emit VMOVPs */ + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4(its)) + continue; + + if (!require_its_list_vmovp(vpe->its_vm, its)) + continue; + + desc.its_vmovp_cmd.col = &its->collections[col_id]; + its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe) +{ + struct its_cmd_desc desc; + + desc.its_vinvall_cmd.vpe = vpe; + its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); +} + +static void its_send_vinv(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + /* + * There is no real VINV command. This is just a normal INV, + * with a VSYNC instead of a SYNC. + */ + desc.its_inv_cmd.dev = dev; + desc.its_inv_cmd.event_id = event_id; + + its_send_single_vcommand(dev->its, its_build_vinv_cmd, &desc); +} + +static void its_send_vint(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + /* + * There is no real VINT command. This is just a normal INT, + * with a VSYNC instead of a SYNC. + */ + desc.its_int_cmd.dev = dev; + desc.its_int_cmd.event_id = event_id; + + its_send_single_vcommand(dev->its, its_build_vint_cmd, &desc); +} + +static void its_send_vclear(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + /* + * There is no real VCLEAR command. This is just a normal CLEAR, + * with a VSYNC instead of a SYNC. + */ + desc.its_clear_cmd.dev = dev; + desc.its_clear_cmd.event_id = event_id; + + its_send_single_vcommand(dev->its, its_build_vclear_cmd, &desc); +} + +static void its_send_invdb(struct its_node *its, struct its_vpe *vpe) +{ + struct its_cmd_desc desc; + + desc.its_invdb_cmd.vpe = vpe; + its_send_single_vcommand(its, its_build_invdb_cmd, &desc); +} + +/* + * irqchip functions - assumes MSI, mostly. + */ +static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) +{ + struct its_vlpi_map *map = get_vlpi_map(d); + irq_hw_number_t hwirq; + void *va; + u8 *cfg; + + if (map) { + va = page_address(map->vm->vprop_page); + hwirq = map->vintid; + + /* Remember the updated property */ + map->properties &= ~clr; + map->properties |= set | LPI_PROP_GROUP1; + } else { + va = gic_rdists->prop_table_va; + hwirq = d->hwirq; + } + + cfg = va + hwirq - 8192; + *cfg &= ~clr; + *cfg |= set | LPI_PROP_GROUP1; + + /* + * Make the above write visible to the redistributors. + * And yes, we're flushing exactly: One. Single. Byte. + * Humpf... + */ + if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) + gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); + else + dsb(ishst); +} + +static void wait_for_syncr(void __iomem *rdbase) +{ + while (readl_relaxed(rdbase + GICR_SYNCR) & 1) + cpu_relax(); +} + +static void direct_lpi_inv(struct irq_data *d) +{ + struct its_vlpi_map *map = get_vlpi_map(d); + void __iomem *rdbase; + unsigned long flags; + u64 val; + int cpu; + + if (map) { + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + WARN_ON(!is_v4_1(its_dev->its)); + + val = GICR_INVLPIR_V; + val |= FIELD_PREP(GICR_INVLPIR_VPEID, map->vpe->vpe_id); + val |= FIELD_PREP(GICR_INVLPIR_INTID, map->vintid); + } else { + val = d->hwirq; + } + + /* Target the redistributor this LPI is currently routed to */ + cpu = irq_to_cpuid_lock(d, &flags); + raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); + rdbase = per_cpu_ptr(gic_rdists->rdist, cpu)->rd_base; + gic_write_lpir(val, rdbase + GICR_INVLPIR); + + wait_for_syncr(rdbase); + raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); + irq_to_cpuid_unlock(d, flags); +} + +static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + lpi_write_config(d, clr, set); + if (gic_rdists->has_direct_lpi && + (is_v4_1(its_dev->its) || !irqd_is_forwarded_to_vcpu(d))) + direct_lpi_inv(d); + else if (!irqd_is_forwarded_to_vcpu(d)) + its_send_inv(its_dev, its_get_event_id(d)); + else + its_send_vinv(its_dev, its_get_event_id(d)); +} + +static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + struct its_vlpi_map *map; + + /* + * GICv4.1 does away with the per-LPI nonsense, nothing to do + * here. + */ + if (is_v4_1(its_dev->its)) + return; + + map = dev_event_to_vlpi_map(its_dev, event); + + if (map->db_enabled == enable) + return; + + map->db_enabled = enable; + + /* + * More fun with the architecture: + * + * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI + * value or to 1023, depending on the enable bit. But that + * would be issueing a mapping for an /existing/ DevID+EventID + * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI + * to the /same/ vPE, using this opportunity to adjust the + * doorbell. Mouahahahaha. We loves it, Precious. + */ + its_send_vmovi(its_dev, event); +} + +static void its_mask_irq(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) + its_vlpi_set_doorbell(d, false); + + lpi_update_config(d, LPI_PROP_ENABLED, 0); +} + +static void its_unmask_irq(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) + its_vlpi_set_doorbell(d, true); + + lpi_update_config(d, 0, LPI_PROP_ENABLED); +} + +static __maybe_unused u32 its_read_lpi_count(struct irq_data *d, int cpu) +{ + if (irqd_affinity_is_managed(d)) + return atomic_read(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); + + return atomic_read(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); +} + +static void its_inc_lpi_count(struct irq_data *d, int cpu) +{ + if (irqd_affinity_is_managed(d)) + atomic_inc(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); + else + atomic_inc(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); +} + +static void its_dec_lpi_count(struct irq_data *d, int cpu) +{ + if (irqd_affinity_is_managed(d)) + atomic_dec(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); + else + atomic_dec(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); +} + +static unsigned int cpumask_pick_least_loaded(struct irq_data *d, + const struct cpumask *cpu_mask) +{ + unsigned int cpu = nr_cpu_ids, tmp; + int count = S32_MAX; + + for_each_cpu(tmp, cpu_mask) { + int this_count = its_read_lpi_count(d, tmp); + if (this_count < count) { + cpu = tmp; + count = this_count; + } + } + + return cpu; +} + +/* + * As suggested by Thomas Gleixner in: + * https://lore.kernel.org/r/87h80q2aoc.fsf@nanos.tec.linutronix.de + */ +static int its_select_cpu(struct irq_data *d, + const struct cpumask *aff_mask) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + cpumask_var_t tmpmask; + int cpu, node; + + if (!alloc_cpumask_var(&tmpmask, GFP_ATOMIC)) + return -ENOMEM; + + node = its_dev->its->numa_node; + + if (!irqd_affinity_is_managed(d)) { + /* First try the NUMA node */ + if (node != NUMA_NO_NODE) { + /* + * Try the intersection of the affinity mask and the + * node mask (and the online mask, just to be safe). + */ + cpumask_and(tmpmask, cpumask_of_node(node), aff_mask); + cpumask_and(tmpmask, tmpmask, cpu_online_mask); + + /* + * Ideally, we would check if the mask is empty, and + * try again on the full node here. + * + * But it turns out that the way ACPI describes the + * affinity for ITSs only deals about memory, and + * not target CPUs, so it cannot describe a single + * ITS placed next to two NUMA nodes. + * + * Instead, just fallback on the online mask. This + * diverges from Thomas' suggestion above. + */ + cpu = cpumask_pick_least_loaded(d, tmpmask); + if (cpu < nr_cpu_ids) + goto out; + + /* If we can't cross sockets, give up */ + if ((its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144)) + goto out; + + /* If the above failed, expand the search */ + } + + /* Try the intersection of the affinity and online masks */ + cpumask_and(tmpmask, aff_mask, cpu_online_mask); + + /* If that doesn't fly, the online mask is the last resort */ + if (cpumask_empty(tmpmask)) + cpumask_copy(tmpmask, cpu_online_mask); + + cpu = cpumask_pick_least_loaded(d, tmpmask); + } else { + cpumask_and(tmpmask, irq_data_get_affinity_mask(d), cpu_online_mask); + + /* If we cannot cross sockets, limit the search to that node */ + if ((its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) && + node != NUMA_NO_NODE) + cpumask_and(tmpmask, tmpmask, cpumask_of_node(node)); + + cpu = cpumask_pick_least_loaded(d, tmpmask); + } +out: + free_cpumask_var(tmpmask); + + pr_debug("IRQ%d -> %*pbl CPU%d\n", d->irq, cpumask_pr_args(aff_mask), cpu); + return cpu; +} + +#define MAX_MARS3_SKT_COUNT 8 + +static int its_cpumask_select(struct its_device *its_dev, + const struct cpumask *mask_val, + const struct cpumask *cpu_mask) +{ + unsigned int skt, skt_id, i; + phys_addr_t its_phys_base; + unsigned int cpu, cpus = 0; + + unsigned int skt_cpu_cnt[MAX_MARS3_SKT_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) { + skt_cpu_cnt[skt]++; + } else if (0xff != skt ) { + pr_err("socket address: %d is out of range.", skt); + } + } + + its_phys_base = its_dev->its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + if (0 != skt_id) { + for (i = 0; i < skt_id; i++) { + cpus += skt_cpu_cnt[i]; + } + } + + cpu = cpumask_any_and(mask_val, cpu_mask); + cpus = cpus + cpu % skt_cpu_cnt[skt_id]; + + return cpus; +} + +static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, + bool force) +{ + unsigned int cpu; + const struct cpumask *cpu_mask = cpu_online_mask; + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_collection *target_col; + u32 id = its_get_event_id(d); + int prev_cpu; + unsigned int skt_t1, skt_t2, cpu_idx; + + /* A forwarded interrupt should use irq_set_vcpu_affinity */ + if (irqd_is_forwarded_to_vcpu(d)) + return -EINVAL; + + prev_cpu = its_dev->event_map.col_map[id]; + its_dec_lpi_count(d, prev_cpu); + + cpu_idx = its_cpumask_select(its_dev, mask_val, cpu_mask); + skt_t1 = (cpu_logical_map(cpu_idx) >> 16) & 0xff; + if (!force) + cpu = its_select_cpu(d, mask_val); + else + cpu = cpumask_pick_least_loaded(d, mask_val); + skt_t2 = (cpu_logical_map(cpu) >> 16) & 0xff; + if (skt_t1 != skt_t2) + cpu = cpu_idx; + + if (cpu < 0 || cpu >= nr_cpu_ids) + goto err; + + /* don't set the affinity when the target cpu is same as current one */ + if (cpu != prev_cpu) { + target_col = &its_dev->its->collections[cpu]; + its_send_movi(its_dev, target_col, id); + its_dev->event_map.col_map[id] = cpu; + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + } + + its_inc_lpi_count(d, cpu); + + return IRQ_SET_MASK_OK_DONE; + +err: + its_inc_lpi_count(d, prev_cpu); + return -EINVAL; +} + +static u64 its_irq_get_msi_base(struct its_device *its_dev) +{ + struct its_node *its = its_dev->its; + + return its->phys_base + GITS_TRANSLATER; +} + +static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_node *its; + u64 addr; + + its = its_dev->its; + addr = its->get_msi_base(its_dev); + + msg->address_lo = lower_32_bits(addr); + msg->address_hi = upper_32_bits(addr); + msg->data = its_get_event_id(d); +} + +static int its_irq_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, + bool state) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (irqd_is_forwarded_to_vcpu(d)) { + if (state) + its_send_vint(its_dev, event); + else + its_send_vclear(its_dev, event); + } else { + if (state) + its_send_int(its_dev, event); + else + its_send_clear(its_dev, event); + } + + return 0; +} + +static int its_irq_retrigger(struct irq_data *d) +{ + return !its_irq_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); +} + +/* + * Two favourable cases: + * + * (a) Either we have a GICv4.1, and all vPEs have to be mapped at all times + * for vSGI delivery + * + * (b) Or the ITSs do not use a list map, meaning that VMOVP is cheap enough + * and we're better off mapping all VPEs always + * + * If neither (a) nor (b) is true, then we map vPEs on demand. + * + */ +static bool gic_requires_eager_mapping(void) +{ + if (!its_list_map || gic_rdists->has_rvpeid) + return true; + + return false; +} + +static void its_map_vm(struct its_node *its, struct its_vm *vm) +{ + unsigned long flags; + + if (gic_requires_eager_mapping()) + return; + + raw_spin_lock_irqsave(&vmovp_lock, flags); + + /* + * If the VM wasn't mapped yet, iterate over the vpes and get + * them mapped now. + */ + vm->vlpi_count[its->list_nr]++; + + if (vm->vlpi_count[its->list_nr] == 1) { + int i; + + for (i = 0; i < vm->nr_vpes; i++) { + struct its_vpe *vpe = vm->vpes[i]; + struct irq_data *d = irq_get_irq_data(vpe->irq); + + /* Map the VPE to the first possible CPU */ + vpe->col_idx = cpumask_first(cpu_online_mask); + its_send_vmapp(its, vpe, true); + its_send_vinvall(its, vpe); + irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); + } + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static void its_unmap_vm(struct its_node *its, struct its_vm *vm) +{ + unsigned long flags; + + /* Not using the ITS list? Everything is always mapped. */ + if (gic_requires_eager_mapping()) + return; + + raw_spin_lock_irqsave(&vmovp_lock, flags); + + if (!--vm->vlpi_count[its->list_nr]) { + int i; + + for (i = 0; i < vm->nr_vpes; i++) + its_send_vmapp(its, vm->vpes[i], false); + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + int ret = 0; + + if (!info->map) + return -EINVAL; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + if (!its_dev->event_map.vm) { + struct its_vlpi_map *maps; + + maps = kcalloc(its_dev->event_map.nr_lpis, sizeof(*maps), + GFP_ATOMIC); + if (!maps) { + ret = -ENOMEM; + goto out; + } + + its_dev->event_map.vm = info->map->vm; + its_dev->event_map.vlpi_maps = maps; + } else if (its_dev->event_map.vm != info->map->vm) { + ret = -EINVAL; + goto out; + } + + /* Get our private copy of the mapping information */ + its_dev->event_map.vlpi_maps[event] = *info->map; + + if (irqd_is_forwarded_to_vcpu(d)) { + /* Already mapped, move it around */ + its_send_vmovi(its_dev, event); + } else { + /* Ensure all the VPEs are mapped on this ITS */ + its_map_vm(its_dev->its, info->map->vm); + + /* + * Flag the interrupt as forwarded so that we can + * start poking the virtual property table. + */ + irqd_set_forwarded_to_vcpu(d); + + /* Write out the property to the prop table */ + lpi_write_config(d, 0xff, info->map->properties); + + /* Drop the physical mapping */ + its_send_discard(its_dev, event); + + /* and install the virtual one */ + its_send_vmapti(its_dev, event); + + /* Increment the number of VLPIs */ + its_dev->event_map.nr_vlpis++; + } + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_vlpi_map *map; + int ret = 0; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + map = get_vlpi_map(d); + + if (!its_dev->event_map.vm || !map) { + ret = -EINVAL; + goto out; + } + + /* Copy our mapping information to the incoming request */ + *info->map = *map; + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_unmap(struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + int ret = 0; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { + ret = -EINVAL; + goto out; + } + + /* Drop the virtual mapping */ + its_send_discard(its_dev, event); + + /* and restore the physical one */ + irqd_clr_forwarded_to_vcpu(d); + its_send_mapti(its_dev, d->hwirq, event); + lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | + LPI_PROP_ENABLED | + LPI_PROP_GROUP1)); + + /* Potentially unmap the VM from this ITS */ + its_unmap_vm(its_dev->its, its_dev->event_map.vm); + + /* + * Drop the refcount and make the device available again if + * this was the last VLPI. + */ + if (!--its_dev->event_map.nr_vlpis) { + its_dev->event_map.vm = NULL; + kfree(its_dev->event_map.vlpi_maps); + } + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) + return -EINVAL; + + if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) + lpi_update_config(d, 0xff, info->config); + else + lpi_write_config(d, 0xff, info->config); + its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); + + return 0; +} + +static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + /* Need a v4 ITS */ + if (!is_v4(its_dev->its)) + return -EINVAL; + + /* Unmap request? */ + if (!info) + return its_vlpi_unmap(d); + + switch (info->cmd_type) { + case MAP_VLPI: + return its_vlpi_map(d, info); + + case GET_VLPI: + return its_vlpi_get(d, info); + + case PROP_UPDATE_VLPI: + case PROP_UPDATE_AND_INV_VLPI: + return its_vlpi_prop_update(d, info); + + default: + return -EINVAL; + } +} + +static struct irq_chip its_irq_chip = { + .name = "ITS", + .irq_mask = its_mask_irq, + .irq_unmask = its_unmask_irq, + .irq_eoi = irq_chip_eoi_parent, + .irq_set_affinity = its_set_affinity, + .irq_compose_msi_msg = its_irq_compose_msi_msg, + .irq_set_irqchip_state = its_irq_set_irqchip_state, + .irq_retrigger = its_irq_retrigger, + .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, +}; + + +/* + * How we allocate LPIs: + * + * lpi_range_list contains ranges of LPIs that are to available to + * allocate from. To allocate LPIs, just pick the first range that + * fits the required allocation, and reduce it by the required + * amount. Once empty, remove the range from the list. + * + * To free a range of LPIs, add a free range to the list, sort it and + * merge the result if the new range happens to be adjacent to an + * already free block. + * + * The consequence of the above is that allocation is cost is low, but + * freeing is expensive. We assumes that freeing rarely occurs. + */ +#define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ + +static DEFINE_MUTEX(lpi_range_lock); +static LIST_HEAD(lpi_range_list); + +struct lpi_range { + struct list_head entry; + u32 base_id; + u32 span; +}; + +static struct lpi_range *mk_lpi_range(u32 base, u32 span) +{ + struct lpi_range *range; + + range = kmalloc(sizeof(*range), GFP_KERNEL); + if (range) { + range->base_id = base; + range->span = span; + } + + return range; +} + +static int alloc_lpi_range(u32 nr_lpis, u32 *base) +{ + struct lpi_range *range, *tmp; + int err = -ENOSPC; + + mutex_lock(&lpi_range_lock); + + list_for_each_entry_safe(range, tmp, &lpi_range_list, entry) { + if (range->span >= nr_lpis) { + *base = range->base_id; + range->base_id += nr_lpis; + range->span -= nr_lpis; + + if (range->span == 0) { + list_del(&range->entry); + kfree(range); + } + + err = 0; + break; + } + } + + mutex_unlock(&lpi_range_lock); + + pr_debug("ITS: alloc %u:%u\n", *base, nr_lpis); + return err; +} + +static void merge_lpi_ranges(struct lpi_range *a, struct lpi_range *b) +{ + if (&a->entry == &lpi_range_list || &b->entry == &lpi_range_list) + return; + if (a->base_id + a->span != b->base_id) + return; + b->base_id = a->base_id; + b->span += a->span; + list_del(&a->entry); + kfree(a); +} + +static int free_lpi_range(u32 base, u32 nr_lpis) +{ + struct lpi_range *new, *old; + + new = mk_lpi_range(base, nr_lpis); + if (!new) + return -ENOMEM; + + mutex_lock(&lpi_range_lock); + + list_for_each_entry_reverse(old, &lpi_range_list, entry) { + if (old->base_id < base) + break; + } + /* + * old is the last element with ->base_id smaller than base, + * so new goes right after it. If there are no elements with + * ->base_id smaller than base, &old->entry ends up pointing + * at the head of the list, and inserting new it the start of + * the list is the right thing to do in that case as well. + */ + list_add(&new->entry, &old->entry); + /* + * Now check if we can merge with the preceding and/or + * following ranges. + */ + merge_lpi_ranges(old, new); + merge_lpi_ranges(new, list_next_entry(new, entry)); + + mutex_unlock(&lpi_range_lock); + return 0; +} + +static int __init its_lpi_init(u32 id_bits) +{ + u32 lpis = (1UL << id_bits) - 8192; + u32 numlpis; + int err; + + numlpis = 1UL << GICD_TYPER_NUM_LPIS(gic_rdists->gicd_typer); + + if (numlpis > 2 && !WARN_ON(numlpis > lpis)) { + lpis = numlpis; + pr_info("ITS: Using hypervisor restricted LPI range [%u]\n", + lpis); + } + + /* + * Initializing the allocator is just the same as freeing the + * full range of LPIs. + */ + err = free_lpi_range(8192, lpis); + pr_debug("ITS: Allocator initialized for %u LPIs\n", lpis); + return err; +} + +static unsigned long *its_lpi_alloc(int nr_irqs, u32 *base, int *nr_ids) +{ + unsigned long *bitmap = NULL; + int err = 0; + + do { + err = alloc_lpi_range(nr_irqs, base); + if (!err) + break; + + nr_irqs /= 2; + } while (nr_irqs > 0); + + if (!nr_irqs) + err = -ENOSPC; + + if (err) + goto out; + + bitmap = kcalloc(BITS_TO_LONGS(nr_irqs), sizeof (long), GFP_ATOMIC); + if (!bitmap) + goto out; + + *nr_ids = nr_irqs; + +out: + if (!bitmap) + *base = *nr_ids = 0; + + return bitmap; +} + +static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids) +{ + WARN_ON(free_lpi_range(base, nr_ids)); + kfree(bitmap); +} + +static void gic_reset_prop_table(void *va) +{ + /* Priority 0xa0, Group-1, disabled */ + memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ); + + /* Make sure the GIC will observe the written configuration */ + gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ); +} + +static struct page *its_allocate_prop_table(gfp_t gfp_flags) +{ + struct page *prop_page; + + prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); + if (!prop_page) + return NULL; + + gic_reset_prop_table(page_address(prop_page)); + + return prop_page; +} + +static void its_free_prop_table(struct page *prop_page) +{ + free_pages((unsigned long)page_address(prop_page), + get_order(LPI_PROPBASE_SZ)); +} + +static bool gic_check_reserved_range(phys_addr_t addr, unsigned long size) +{ + phys_addr_t start, end, addr_end; + u64 i; + + /* + * We don't bother checking for a kdump kernel as by + * construction, the LPI tables are out of this kernel's + * memory map. + */ + if (is_kdump_kernel()) + return true; + + addr_end = addr + size - 1; + + for_each_reserved_mem_range(i, &start, &end) { + if (addr >= start && addr_end <= end) + return true; + } + + /* Not found, not a good sign... */ + pr_warn("GICv3: Expected reserved range [%pa:%pa], not found\n", + &addr, &addr_end); + add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); + return false; +} + +static int gic_reserve_range(phys_addr_t addr, unsigned long size) +{ + if (efi_enabled(EFI_CONFIG_TABLES)) + return efi_mem_reserve_persistent(addr, size); + + return 0; +} + +static int __init its_setup_lpi_prop_table(void) +{ + if (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) { + u64 val; + + val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); + lpi_id_bits = (val & GICR_PROPBASER_IDBITS_MASK) + 1; + + gic_rdists->prop_table_pa = val & GENMASK_ULL(51, 12); + gic_rdists->prop_table_va = memremap(gic_rdists->prop_table_pa, + LPI_PROPBASE_SZ, + MEMREMAP_WB); + gic_reset_prop_table(gic_rdists->prop_table_va); + } else { + struct page *page; + + lpi_id_bits = min_t(u32, + GICD_TYPER_ID_BITS(gic_rdists->gicd_typer), + ITS_MAX_LPI_NRBITS); + page = its_allocate_prop_table(GFP_NOWAIT); + if (!page) { + pr_err("Failed to allocate PROPBASE\n"); + return -ENOMEM; + } + + gic_rdists->prop_table_pa = page_to_phys(page); + gic_rdists->prop_table_va = page_address(page); + WARN_ON(gic_reserve_range(gic_rdists->prop_table_pa, + LPI_PROPBASE_SZ)); + } + + pr_info("GICv3: using LPI property table @%pa\n", + &gic_rdists->prop_table_pa); + + return its_lpi_init(lpi_id_bits); +} + +static const char *its_base_type_string[] = { + [GITS_BASER_TYPE_DEVICE] = "Devices", + [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", + [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", + [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", + [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", + [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", + [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", +}; + +static u64 its_read_baser(struct its_node *its, struct its_baser *baser) +{ + u32 idx = baser - its->tables; + + return gits_read_baser(its->base + GITS_BASER + (idx << 3)); +} + +static void its_write_baser(struct its_node *its, struct its_baser *baser, + u64 val) +{ + u32 idx = baser - its->tables; + + gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); + baser->val = its_read_baser(its, baser); +} + +static int its_setup_baser(struct its_node *its, struct its_baser *baser, + u64 cache, u64 shr, u32 order, bool indirect) +{ + u64 val = its_read_baser(its, baser); + u64 esz = GITS_BASER_ENTRY_SIZE(val); + u64 type = GITS_BASER_TYPE(val); + u64 baser_phys, tmp; + u32 alloc_pages, psz; + struct page *page; + void *base; + + psz = baser->psz; + alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); + if (alloc_pages > GITS_BASER_PAGES_MAX) { + pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", + &its->phys_base, its_base_type_string[type], + alloc_pages, GITS_BASER_PAGES_MAX); + alloc_pages = GITS_BASER_PAGES_MAX; + order = get_order(GITS_BASER_PAGES_MAX * psz); + } + + page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, order); + if (!page) + return -ENOMEM; + + base = (void *)page_address(page); + baser_phys = virt_to_phys(base); + + /* Check if the physical address of the memory is above 48bits */ + if (IS_ENABLED(CONFIG_ARM64_64K_PAGES) && (baser_phys >> 48)) { + + /* 52bit PA is supported only when PageSize=64K */ + if (psz != SZ_64K) { + pr_err("ITS: no 52bit PA support when psz=%d\n", psz); + free_pages((unsigned long)base, order); + return -ENXIO; + } + + /* Convert 52bit PA to 48bit field */ + baser_phys = GITS_BASER_PHYS_52_to_48(baser_phys); + } + +retry_baser: + val = (baser_phys | + (type << GITS_BASER_TYPE_SHIFT) | + ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | + ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | + cache | + shr | + GITS_BASER_VALID); + + val |= indirect ? GITS_BASER_INDIRECT : 0x0; + + switch (psz) { + case SZ_4K: + val |= GITS_BASER_PAGE_SIZE_4K; + break; + case SZ_16K: + val |= GITS_BASER_PAGE_SIZE_16K; + break; + case SZ_64K: + val |= GITS_BASER_PAGE_SIZE_64K; + break; + } + + its_write_baser(its, baser, val); + tmp = baser->val; + + if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { + /* + * Shareability didn't stick. Just use + * whatever the read reported, which is likely + * to be the only thing this redistributor + * supports. If that's zero, make it + * non-cacheable as well. + */ + shr = tmp & GITS_BASER_SHAREABILITY_MASK; + if (!shr) { + cache = GITS_BASER_nC; + gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); + } + goto retry_baser; + } + + if (val != tmp) { + pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", + &its->phys_base, its_base_type_string[type], + val, tmp); + free_pages((unsigned long)base, order); + return -ENXIO; + } + + baser->order = order; + baser->base = base; + baser->psz = psz; + tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; + + pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", + &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), + its_base_type_string[type], + (unsigned long)virt_to_phys(base), + indirect ? "indirect" : "flat", (int)esz, + psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); + + return 0; +} + +static bool its_parse_indirect_baser(struct its_node *its, + struct its_baser *baser, + u32 *order, u32 ids) +{ + u64 tmp = its_read_baser(its, baser); + u64 type = GITS_BASER_TYPE(tmp); + u64 esz = GITS_BASER_ENTRY_SIZE(tmp); + u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; + u32 new_order = *order; + u32 psz = baser->psz; + bool indirect = false; + + /* No need to enable Indirection if memory requirement < (psz*2)bytes */ + if ((esz << ids) > (psz * 2)) { + /* + * Find out whether hw supports a single or two-level table by + * table by reading bit at offset '62' after writing '1' to it. + */ + its_write_baser(its, baser, val | GITS_BASER_INDIRECT); + indirect = !!(baser->val & GITS_BASER_INDIRECT); + + if (indirect) { + /* + * The size of the lvl2 table is equal to ITS page size + * which is 'psz'. For computing lvl1 table size, + * subtract ID bits that sparse lvl2 table from 'ids' + * which is reported by ITS hardware times lvl1 table + * entry size. + */ + ids -= ilog2(psz / (int)esz); + esz = GITS_LVL1_ENTRY_SIZE; + } + } + + /* + * Allocate as many entries as required to fit the + * range of device IDs that the ITS can grok... The ID + * space being incredibly sparse, this results in a + * massive waste of memory if two-level device table + * feature is not supported by hardware. + */ + new_order = max_t(u32, get_order(esz << ids), new_order); + if (new_order >= MAX_ORDER) { + new_order = MAX_ORDER - 1; + ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); + pr_warn("ITS@%pa: %s Table too large, reduce ids %llu->%u\n", + &its->phys_base, its_base_type_string[type], + device_ids(its), ids); + } + + *order = new_order; + + return indirect; +} + +static u32 compute_common_aff(u64 val) +{ + u32 aff, clpiaff; + + aff = FIELD_GET(GICR_TYPER_AFFINITY, val); + clpiaff = FIELD_GET(GICR_TYPER_COMMON_LPI_AFF, val); + + return aff & ~(GENMASK(31, 0) >> (clpiaff * 8)); +} + +static u32 compute_its_aff(struct its_node *its) +{ + u64 val; + u32 svpet; + + /* + * Reencode the ITS SVPET and MPIDR as a GICR_TYPER, and compute + * the resulting affinity. We then use that to see if this match + * our own affinity. + */ + svpet = FIELD_GET(GITS_TYPER_SVPET, its->typer); + val = FIELD_PREP(GICR_TYPER_COMMON_LPI_AFF, svpet); + val |= FIELD_PREP(GICR_TYPER_AFFINITY, its->mpidr); + return compute_common_aff(val); +} + +static struct its_node *find_sibling_its(struct its_node *cur_its) +{ + struct its_node *its; + u32 aff; + + if (!FIELD_GET(GITS_TYPER_SVPET, cur_its->typer)) + return NULL; + + aff = compute_its_aff(cur_its); + + list_for_each_entry(its, &its_nodes, entry) { + u64 baser; + + if (!is_v4_1(its) || its == cur_its) + continue; + + if (!FIELD_GET(GITS_TYPER_SVPET, its->typer)) + continue; + + if (aff != compute_its_aff(its)) + continue; + + /* GICv4.1 guarantees that the vPE table is GITS_BASER2 */ + baser = its->tables[2].val; + if (!(baser & GITS_BASER_VALID)) + continue; + + return its; + } + + return NULL; +} + +static void its_free_tables(struct its_node *its) +{ + int i; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + if (its->tables[i].base) { + free_pages((unsigned long)its->tables[i].base, + its->tables[i].order); + its->tables[i].base = NULL; + } + } +} + +static int its_probe_baser_psz(struct its_node *its, struct its_baser *baser) +{ + u64 psz = SZ_64K; + + while (psz) { + u64 val, gpsz; + + val = its_read_baser(its, baser); + val &= ~GITS_BASER_PAGE_SIZE_MASK; + + switch (psz) { + case SZ_64K: + gpsz = GITS_BASER_PAGE_SIZE_64K; + break; + case SZ_16K: + gpsz = GITS_BASER_PAGE_SIZE_16K; + break; + case SZ_4K: + default: + gpsz = GITS_BASER_PAGE_SIZE_4K; + break; + } + + gpsz >>= GITS_BASER_PAGE_SIZE_SHIFT; + + val |= FIELD_PREP(GITS_BASER_PAGE_SIZE_MASK, gpsz); + its_write_baser(its, baser, val); + + if (FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser->val) == gpsz) + break; + + switch (psz) { + case SZ_64K: + psz = SZ_16K; + break; + case SZ_16K: + psz = SZ_4K; + break; + case SZ_4K: + default: + return -1; + } + } + + baser->psz = psz; + return 0; +} + +static int its_alloc_tables(struct its_node *its) +{ + u64 shr = GITS_BASER_InnerShareable; + u64 cache = GITS_BASER_RaWaWb; + int err, i; + + if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) + /* erratum 24313: ignore memory access type */ + cache = GITS_BASER_nCnB; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + struct its_baser *baser = its->tables + i; + u64 val = its_read_baser(its, baser); + u64 type = GITS_BASER_TYPE(val); + bool indirect = false; + u32 order; + + if (type == GITS_BASER_TYPE_NONE) + continue; + + if (its_probe_baser_psz(its, baser)) { + its_free_tables(its); + return -ENXIO; + } + + order = get_order(baser->psz); + + switch (type) { + case GITS_BASER_TYPE_DEVICE: + indirect = its_parse_indirect_baser(its, baser, &order, + device_ids(its)); + break; + + case GITS_BASER_TYPE_VCPU: + if (is_v4_1(its)) { + struct its_node *sibling; + + WARN_ON(i != 2); + if ((sibling = find_sibling_its(its))) { + *baser = sibling->tables[2]; + its_write_baser(its, baser, baser->val); + continue; + } + } + + indirect = its_parse_indirect_baser(its, baser, &order, + ITS_MAX_VPEID_BITS); + break; + } + + err = its_setup_baser(its, baser, cache, shr, order, indirect); + if (err < 0) { + its_free_tables(its); + return err; + } + + /* Update settings which will be used for next BASERn */ + cache = baser->val & GITS_BASER_CACHEABILITY_MASK; + shr = baser->val & GITS_BASER_SHAREABILITY_MASK; + } + + return 0; +} + +static u64 inherit_vpe_l1_table_from_its(void) +{ + struct its_node *its; + u64 val; + u32 aff; + + val = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); + aff = compute_common_aff(val); + + list_for_each_entry(its, &its_nodes, entry) { + u64 baser, addr; + + if (!is_v4_1(its)) + continue; + + if (!FIELD_GET(GITS_TYPER_SVPET, its->typer)) + continue; + + if (aff != compute_its_aff(its)) + continue; + + /* GICv4.1 guarantees that the vPE table is GITS_BASER2 */ + baser = its->tables[2].val; + if (!(baser & GITS_BASER_VALID)) + continue; + + /* We have a winner! */ + gic_data_rdist()->vpe_l1_base = its->tables[2].base; + + val = GICR_VPROPBASER_4_1_VALID; + if (baser & GITS_BASER_INDIRECT) + val |= GICR_VPROPBASER_4_1_INDIRECT; + val |= FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, + FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser)); + switch (FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser)) { + case GIC_PAGE_SIZE_64K: + addr = GITS_BASER_ADDR_48_to_52(baser); + break; + default: + addr = baser & GENMASK_ULL(47, 12); + break; + } + val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, addr >> 12); + val |= FIELD_PREP(GICR_VPROPBASER_SHAREABILITY_MASK, + FIELD_GET(GITS_BASER_SHAREABILITY_MASK, baser)); + val |= FIELD_PREP(GICR_VPROPBASER_INNER_CACHEABILITY_MASK, + FIELD_GET(GITS_BASER_INNER_CACHEABILITY_MASK, baser)); + val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, GITS_BASER_NR_PAGES(baser) - 1); + + return val; + } + + return 0; +} + +static u64 inherit_vpe_l1_table_from_rd(cpumask_t **mask) +{ + u32 aff; + u64 val; + int cpu; + + val = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); + aff = compute_common_aff(val); + + for_each_possible_cpu(cpu) { + void __iomem *base = gic_data_rdist_cpu(cpu)->rd_base; + + if (!base || cpu == smp_processor_id()) + continue; + + val = gic_read_typer(base + GICR_TYPER); + if (aff != compute_common_aff(val)) + continue; + + /* + * At this point, we have a victim. This particular CPU + * has already booted, and has an affinity that matches + * ours wrt CommonLPIAff. Let's use its own VPROPBASER. + * Make sure we don't write the Z bit in that case. + */ + val = gicr_read_vpropbaser(base + SZ_128K + GICR_VPROPBASER); + val &= ~GICR_VPROPBASER_4_1_Z; + + gic_data_rdist()->vpe_l1_base = gic_data_rdist_cpu(cpu)->vpe_l1_base; + *mask = gic_data_rdist_cpu(cpu)->vpe_table_mask; + + return val; + } + + return 0; +} + +static bool allocate_vpe_l2_table(int cpu, u32 id) +{ + void __iomem *base = gic_data_rdist_cpu(cpu)->rd_base; + unsigned int psz, esz, idx, npg, gpsz; + u64 val; + struct page *page; + __le64 *table; + + if (!gic_rdists->has_rvpeid) + return true; + + /* Skip non-present CPUs */ + if (!base) + return true; + + val = gicr_read_vpropbaser(base + SZ_128K + GICR_VPROPBASER); + + esz = FIELD_GET(GICR_VPROPBASER_4_1_ENTRY_SIZE, val) + 1; + gpsz = FIELD_GET(GICR_VPROPBASER_4_1_PAGE_SIZE, val); + npg = FIELD_GET(GICR_VPROPBASER_4_1_SIZE, val) + 1; + + switch (gpsz) { + default: + WARN_ON(1); + fallthrough; + case GIC_PAGE_SIZE_4K: + psz = SZ_4K; + break; + case GIC_PAGE_SIZE_16K: + psz = SZ_16K; + break; + case GIC_PAGE_SIZE_64K: + psz = SZ_64K; + break; + } + + /* Don't allow vpe_id that exceeds single, flat table limit */ + if (!(val & GICR_VPROPBASER_4_1_INDIRECT)) + return (id < (npg * psz / (esz * SZ_8))); + + /* Compute 1st level table index & check if that exceeds table limit */ + idx = id >> ilog2(psz / (esz * SZ_8)); + if (idx >= (npg * psz / GITS_LVL1_ENTRY_SIZE)) + return false; + + table = gic_data_rdist_cpu(cpu)->vpe_l1_base; + + /* Allocate memory for 2nd level table */ + if (!table[idx]) { + page = alloc_pages(GFP_KERNEL | __GFP_ZERO, get_order(psz)); + if (!page) + return false; + + /* Flush Lvl2 table to PoC if hw doesn't support coherency */ + if (!(val & GICR_VPROPBASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(page_address(page), psz); + + table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); + + /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ + if (!(val & GICR_VPROPBASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); + + /* Ensure updated table contents are visible to RD hardware */ + dsb(sy); + } + + return true; +} + +static int allocate_vpe_l1_table(void) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val, gpsz, npg, pa; + unsigned int psz = SZ_64K; + unsigned int np, epp, esz; + struct page *page; + + if (!gic_rdists->has_rvpeid) + return 0; + + /* + * if VPENDBASER.Valid is set, disable any previously programmed + * VPE by setting PendingLast while clearing Valid. This has the + * effect of making sure no doorbell will be generated and we can + * then safely clear VPROPBASER.Valid. + */ + if (gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER) & GICR_VPENDBASER_Valid) + gicr_write_vpendbaser(GICR_VPENDBASER_PendingLast, + vlpi_base + GICR_VPENDBASER); + + /* + * If we can inherit the configuration from another RD, let's do + * so. Otherwise, we have to go through the allocation process. We + * assume that all RDs have the exact same requirements, as + * nothing will work otherwise. + */ + val = inherit_vpe_l1_table_from_rd(&gic_data_rdist()->vpe_table_mask); + if (val & GICR_VPROPBASER_4_1_VALID) + goto out; + + gic_data_rdist()->vpe_table_mask = kzalloc(sizeof(cpumask_t), GFP_ATOMIC); + if (!gic_data_rdist()->vpe_table_mask) + return -ENOMEM; + + val = inherit_vpe_l1_table_from_its(); + if (val & GICR_VPROPBASER_4_1_VALID) + goto out; + + /* First probe the page size */ + val = FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, GIC_PAGE_SIZE_64K); + gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + val = gicr_read_vpropbaser(vlpi_base + GICR_VPROPBASER); + gpsz = FIELD_GET(GICR_VPROPBASER_4_1_PAGE_SIZE, val); + esz = FIELD_GET(GICR_VPROPBASER_4_1_ENTRY_SIZE, val); + + switch (gpsz) { + default: + gpsz = GIC_PAGE_SIZE_4K; + fallthrough; + case GIC_PAGE_SIZE_4K: + psz = SZ_4K; + break; + case GIC_PAGE_SIZE_16K: + psz = SZ_16K; + break; + case GIC_PAGE_SIZE_64K: + psz = SZ_64K; + break; + } + + /* + * Start populating the register from scratch, including RO fields + * (which we want to print in debug cases...) + */ + val = 0; + val |= FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, gpsz); + val |= FIELD_PREP(GICR_VPROPBASER_4_1_ENTRY_SIZE, esz); + + /* How many entries per GIC page? */ + esz++; + epp = psz / (esz * SZ_8); + + /* + * If we need more than just a single L1 page, flag the table + * as indirect and compute the number of required L1 pages. + */ + if (epp < ITS_MAX_VPEID) { + int nl2; + + val |= GICR_VPROPBASER_4_1_INDIRECT; + + /* Number of L2 pages required to cover the VPEID space */ + nl2 = DIV_ROUND_UP(ITS_MAX_VPEID, epp); + + /* Number of L1 pages to point to the L2 pages */ + npg = DIV_ROUND_UP(nl2 * SZ_8, psz); + } else { + npg = 1; + } + + val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, npg - 1); + + /* Right, that's the number of CPU pages we need for L1 */ + np = DIV_ROUND_UP(npg * psz, PAGE_SIZE); + + pr_debug("np = %d, npg = %lld, psz = %d, epp = %d, esz = %d\n", + np, npg, psz, epp, esz); + page = alloc_pages(GFP_ATOMIC | __GFP_ZERO, get_order(np * PAGE_SIZE)); + if (!page) + return -ENOMEM; + + gic_data_rdist()->vpe_l1_base = page_address(page); + pa = virt_to_phys(page_address(page)); + WARN_ON(!IS_ALIGNED(pa, psz)); + + val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, pa >> 12); + val |= GICR_VPROPBASER_RaWb; + val |= GICR_VPROPBASER_InnerShareable; + val |= GICR_VPROPBASER_4_1_Z; + val |= GICR_VPROPBASER_4_1_VALID; + +out: + gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + cpumask_set_cpu(smp_processor_id(), gic_data_rdist()->vpe_table_mask); + + pr_debug("CPU%d: VPROPBASER = %llx %*pbl\n", + smp_processor_id(), val, + cpumask_pr_args(gic_data_rdist()->vpe_table_mask)); + + return 0; +} + +static int its_alloc_collections(struct its_node *its) +{ + int i; + + its->collections = kcalloc(nr_cpu_ids, sizeof(*its->collections), + GFP_KERNEL); + if (!its->collections) + return -ENOMEM; + + for (i = 0; i < nr_cpu_ids; i++) + its->collections[i].target_address = ~0ULL; + + return 0; +} + +static struct page *its_allocate_pending_table(gfp_t gfp_flags) +{ + struct page *pend_page; + + pend_page = alloc_pages(gfp_flags | __GFP_ZERO, + get_order(LPI_PENDBASE_SZ)); + if (!pend_page) + return NULL; + + /* Make sure the GIC will observe the zero-ed page */ + gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); + + return pend_page; +} + +static void its_free_pending_table(struct page *pt) +{ + free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ)); +} + +/* + * Booting with kdump and LPIs enabled is generally fine. Any other + * case is wrong in the absence of firmware/EFI support. + */ +static bool enabled_lpis_allowed(void) +{ + phys_addr_t addr; + u64 val; + + /* Check whether the property table is in a reserved region */ + val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); + addr = val & GENMASK_ULL(51, 12); + + return gic_check_reserved_range(addr, LPI_PROPBASE_SZ); +} + +static int __init allocate_lpi_tables(void) +{ + u64 val; + int err, cpu; + + /* + * If LPIs are enabled while we run this from the boot CPU, + * flag the RD tables as pre-allocated if the stars do align. + */ + val = readl_relaxed(gic_data_rdist_rd_base() + GICR_CTLR); + if ((val & GICR_CTLR_ENABLE_LPIS) && enabled_lpis_allowed()) { + gic_rdists->flags |= (RDIST_FLAGS_RD_TABLES_PREALLOCATED | + RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING); + pr_info("GICv3: Using preallocated redistributor tables\n"); + } + + err = its_setup_lpi_prop_table(); + if (err) + return err; + + /* + * We allocate all the pending tables anyway, as we may have a + * mix of RDs that have had LPIs enabled, and some that + * don't. We'll free the unused ones as each CPU comes online. + */ + for_each_possible_cpu(cpu) { + struct page *pend_page; + + pend_page = its_allocate_pending_table(GFP_NOWAIT); + if (!pend_page) { + pr_err("Failed to allocate PENDBASE for CPU%d\n", cpu); + return -ENOMEM; + } + + gic_data_rdist_cpu(cpu)->pend_page = pend_page; + } + + return 0; +} + +static u64 its_clear_vpend_valid(void __iomem *vlpi_base, u64 clr, u64 set) +{ + u32 count = 1000000; /* 1s! */ + bool clean; + u64 val; + + val = gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER); + val &= ~GICR_VPENDBASER_Valid; + val &= ~clr; + val |= set; + gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); + + do { + val = gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER); + clean = !(val & GICR_VPENDBASER_Dirty); + if (!clean) { + count--; + cpu_relax(); + udelay(1); + } + } while (!clean && count); + + if (unlikely(val & GICR_VPENDBASER_Dirty)) { + pr_err_ratelimited("ITS virtual pending table not cleaning\n"); + val |= GICR_VPENDBASER_PendingLast; + } + + return val; +} + +static void its_cpu_init_lpis(void) +{ + void __iomem *rbase = gic_data_rdist_rd_base(); + struct page *pend_page; + phys_addr_t paddr; + u64 val, tmp; + + if (gic_data_rdist()->lpi_enabled) + return; + + val = readl_relaxed(rbase + GICR_CTLR); + if ((gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) && + (val & GICR_CTLR_ENABLE_LPIS)) { + /* + * Check that we get the same property table on all + * RDs. If we don't, this is hopeless. + */ + paddr = gicr_read_propbaser(rbase + GICR_PROPBASER); + paddr &= GENMASK_ULL(51, 12); + if (WARN_ON(gic_rdists->prop_table_pa != paddr)) + add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); + + paddr = gicr_read_pendbaser(rbase + GICR_PENDBASER); + paddr &= GENMASK_ULL(51, 16); + + WARN_ON(!gic_check_reserved_range(paddr, LPI_PENDBASE_SZ)); + its_free_pending_table(gic_data_rdist()->pend_page); + gic_data_rdist()->pend_page = NULL; + + goto out; + } + + pend_page = gic_data_rdist()->pend_page; + paddr = page_to_phys(pend_page); + WARN_ON(gic_reserve_range(paddr, LPI_PENDBASE_SZ)); + + /* set PROPBASE */ + val = (gic_rdists->prop_table_pa | + GICR_PROPBASER_InnerShareable | + GICR_PROPBASER_RaWaWb | + ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); + + gicr_write_propbaser(val, rbase + GICR_PROPBASER); + tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); + + if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { + if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must + * remove the cacheability attributes as + * well. + */ + val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | + GICR_PROPBASER_CACHEABILITY_MASK); + val |= GICR_PROPBASER_nC; + gicr_write_propbaser(val, rbase + GICR_PROPBASER); + } + pr_info_once("GIC: using cache flushing for LPI property table\n"); + gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; + } + + /* set PENDBASE */ + val = (page_to_phys(pend_page) | + GICR_PENDBASER_InnerShareable | + GICR_PENDBASER_RaWaWb); + + gicr_write_pendbaser(val, rbase + GICR_PENDBASER); + tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); + + if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must remove the + * cacheability attributes as well. + */ + val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | + GICR_PENDBASER_CACHEABILITY_MASK); + val |= GICR_PENDBASER_nC; + gicr_write_pendbaser(val, rbase + GICR_PENDBASER); + } + + /* Enable LPIs */ + val = readl_relaxed(rbase + GICR_CTLR); + val |= GICR_CTLR_ENABLE_LPIS; + writel_relaxed(val, rbase + GICR_CTLR); + + if (gic_rdists->has_vlpis && !gic_rdists->has_rvpeid) { + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + + /* + * It's possible for CPU to receive VLPIs before it is + * sheduled as a vPE, especially for the first CPU, and the + * VLPI with INTID larger than 2^(IDbits+1) will be considered + * as out of range and dropped by GIC. + * So we initialize IDbits to known value to avoid VLPI drop. + */ + val = (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; + pr_debug("GICv4: CPU%d: Init IDbits to 0x%llx for GICR_VPROPBASER\n", + smp_processor_id(), val); + gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + + /* + * Also clear Valid bit of GICR_VPENDBASER, in case some + * ancient programming gets left in and has possibility of + * corrupting memory. + */ + val = its_clear_vpend_valid(vlpi_base, 0, 0); + } + + if (allocate_vpe_l1_table()) { + /* + * If the allocation has failed, we're in massive trouble. + * Disable direct injection, and pray that no VM was + * already running... + */ + gic_rdists->has_rvpeid = false; + gic_rdists->has_vlpis = false; + } + + /* Make sure the GIC has seen the above */ + dsb(sy); +out: + gic_data_rdist()->lpi_enabled = true; + pr_info("GICv3: CPU%d: using %s LPI pending table @%pa\n", + smp_processor_id(), + gic_data_rdist()->pend_page ? "allocated" : "reserved", + &paddr); +} + +static void its_cpu_init_collection(struct its_node *its) +{ + int cpu = smp_processor_id(); + u64 target; + unsigned long mpid; + phys_addr_t its_phys_base; + unsigned long skt_id; + + /* avoid cross node collections and its mapping */ + if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { + struct device_node *cpu_node; + + cpu_node = of_get_cpu_node(cpu, NULL); + if (its->numa_node != NUMA_NO_NODE && + its->numa_node != of_node_to_nid(cpu_node)) + return; + } + + mpid = cpu_logical_map(cpu); + its_phys_base = its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + /* + * We now have to bind each collection to its target + * redistributor. + */ + if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { + /* + * This ITS wants the physical address of the + * redistributor. + */ + target = gic_data_rdist()->phys_base; + } else { + /* This ITS wants a linear CPU number. */ + target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); + target = GICR_TYPER_CPU_NUMBER(target) << 16; + } + + /* Perform collection mapping */ + its->collections[cpu].target_address = target; + its->collections[cpu].col_id = cpu % 64; + + its_send_mapc(its, &its->collections[cpu], 1); + its_send_invall(its, &its->collections[cpu]); +} + +static void its_cpu_init_collections(void) +{ + struct its_node *its; + + raw_spin_lock(&its_lock); + + list_for_each_entry(its, &its_nodes, entry) + its_cpu_init_collection(its); + + raw_spin_unlock(&its_lock); +} + +static struct its_device *its_find_device(struct its_node *its, u32 dev_id) +{ + struct its_device *its_dev = NULL, *tmp; + unsigned long flags; + + raw_spin_lock_irqsave(&its->lock, flags); + + list_for_each_entry(tmp, &its->its_device_list, entry) { + if (tmp->device_id == dev_id) { + its_dev = tmp; + break; + } + } + + raw_spin_unlock_irqrestore(&its->lock, flags); + + return its_dev; +} + +static struct its_baser *its_get_baser(struct its_node *its, u32 type) +{ + int i; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + if (GITS_BASER_TYPE(its->tables[i].val) == type) + return &its->tables[i]; + } + + return NULL; +} + +static bool its_alloc_table_entry(struct its_node *its, + struct its_baser *baser, u32 id) +{ + struct page *page; + u32 esz, idx; + __le64 *table; + + /* Don't allow device id that exceeds single, flat table limit */ + esz = GITS_BASER_ENTRY_SIZE(baser->val); + if (!(baser->val & GITS_BASER_INDIRECT)) + return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); + + /* Compute 1st level table index & check if that exceeds table limit */ + idx = id >> ilog2(baser->psz / esz); + if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) + return false; + + table = baser->base; + + /* Allocate memory for 2nd level table */ + if (!table[idx]) { + page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, + get_order(baser->psz)); + if (!page) + return false; + + /* Flush Lvl2 table to PoC if hw doesn't support coherency */ + if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(page_address(page), baser->psz); + + table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); + + /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ + if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); + + /* Ensure updated table contents are visible to ITS hardware */ + dsb(sy); + } + + return true; +} + +static bool its_alloc_device_table(struct its_node *its, u32 dev_id) +{ + struct its_baser *baser; + + baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); + + /* Don't allow device id that exceeds ITS hardware limit */ + if (!baser) + return (ilog2(dev_id) < device_ids(its)); + + return its_alloc_table_entry(its, baser, dev_id); +} + +static bool its_alloc_vpe_table(u32 vpe_id) +{ + struct its_node *its; + int cpu; + + /* + * Make sure the L2 tables are allocated on *all* v4 ITSs. We + * could try and only do it on ITSs corresponding to devices + * that have interrupts targeted at this VPE, but the + * complexity becomes crazy (and you have tons of memory + * anyway, right?). + */ + list_for_each_entry(its, &its_nodes, entry) { + struct its_baser *baser; + + if (!is_v4(its)) + continue; + + baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); + if (!baser) + return false; + + if (!its_alloc_table_entry(its, baser, vpe_id)) + return false; + } + + /* Non v4.1? No need to iterate RDs and go back early. */ + if (!gic_rdists->has_rvpeid) + return true; + + /* + * Make sure the L2 tables are allocated for all copies of + * the L1 table on *all* v4.1 RDs. + */ + for_each_possible_cpu(cpu) { + if (!allocate_vpe_l2_table(cpu, vpe_id)) + return false; + } + + return true; +} + +static struct its_device *its_create_device(struct its_node *its, u32 dev_id, + int nvecs, bool alloc_lpis) +{ + struct its_device *dev; + unsigned long *lpi_map = NULL; + unsigned long flags; + u16 *col_map = NULL; + void *itt; + int lpi_base; + int nr_lpis; + int nr_ites; + int sz; + + if (!its_alloc_device_table(its, dev_id)) + return NULL; + + if (WARN_ON(!is_power_of_2(nvecs))) + nvecs = roundup_pow_of_two(nvecs); + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + /* + * Even if the device wants a single LPI, the ITT must be + * sized as a power of two (and you need at least one bit...). + */ + nr_ites = max(2, nvecs); + sz = nr_ites * (FIELD_GET(GITS_TYPER_ITT_ENTRY_SIZE, its->typer) + 1); + sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; + itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node); + if (alloc_lpis) { + lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis); + if (lpi_map) + col_map = kcalloc(nr_lpis, sizeof(*col_map), + GFP_KERNEL); + } else { + col_map = kcalloc(nr_ites, sizeof(*col_map), GFP_KERNEL); + nr_lpis = 0; + lpi_base = 0; + } + + if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { + kfree(dev); + kfree(itt); + kfree(lpi_map); + kfree(col_map); + return NULL; + } + + gic_flush_dcache_to_poc(itt, sz); + + dev->its = its; + dev->itt = itt; + dev->nr_ites = nr_ites; + dev->event_map.lpi_map = lpi_map; + dev->event_map.col_map = col_map; + dev->event_map.lpi_base = lpi_base; + dev->event_map.nr_lpis = nr_lpis; + raw_spin_lock_init(&dev->event_map.vlpi_lock); + dev->device_id = dev_id; + INIT_LIST_HEAD(&dev->entry); + + raw_spin_lock_irqsave(&its->lock, flags); + list_add(&dev->entry, &its->its_device_list); + raw_spin_unlock_irqrestore(&its->lock, flags); + + /* Map device to its ITT */ + its_send_mapd(dev, 1); + + return dev; +} + +static void its_free_device(struct its_device *its_dev) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&its_dev->its->lock, flags); + list_del(&its_dev->entry); + raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); + kfree(its_dev->event_map.col_map); + kfree(its_dev->itt); + kfree(its_dev); +} + +static int its_alloc_device_irq(struct its_device *dev, int nvecs, irq_hw_number_t *hwirq) +{ + int idx; + + /* Find a free LPI region in lpi_map and allocate them. */ + idx = bitmap_find_free_region(dev->event_map.lpi_map, + dev->event_map.nr_lpis, + get_count_order(nvecs)); + if (idx < 0) + return -ENOSPC; + + *hwirq = dev->event_map.lpi_base + idx; + + return 0; +} + +static int its_msi_prepare(struct irq_domain *domain, struct device *dev, + int nvec, msi_alloc_info_t *info) +{ + struct its_node *its; + struct its_device *its_dev; + struct msi_domain_info *msi_info; + u32 dev_id; + int err = 0; + + /* + * We ignore "dev" entirely, and rely on the dev_id that has + * been passed via the scratchpad. This limits this domain's + * usefulness to upper layers that definitely know that they + * are built on top of the ITS. + */ + dev_id = info->scratchpad[0].ul; + + msi_info = msi_get_domain_info(domain); + its = msi_info->data; + + if (!gic_rdists->has_direct_lpi && + vpe_proxy.dev && + vpe_proxy.dev->its == its && + dev_id == vpe_proxy.dev->device_id) { + /* Bad luck. Get yourself a better implementation */ + WARN_ONCE(1, "DevId %x clashes with GICv4 VPE proxy device\n", + dev_id); + return -EINVAL; + } + + mutex_lock(&its->dev_alloc_lock); + its_dev = its_find_device(its, dev_id); + if (its_dev) { + /* + * We already have seen this ID, probably through + * another alias (PCI bridge of some sort). No need to + * create the device. + */ + its_dev->shared = true; + pr_debug("Reusing ITT for devID %x\n", dev_id); + goto out; + } + + its_dev = its_create_device(its, dev_id, nvec, true); + if (!its_dev) { + err = -ENOMEM; + goto out; + } + + pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); +out: + mutex_unlock(&its->dev_alloc_lock); + info->scratchpad[0].ptr = its_dev; + return err; +} + +static struct msi_domain_ops its_msi_domain_ops = { + .msi_prepare = its_msi_prepare, +}; + +static int its_irq_gic_domain_alloc(struct irq_domain *domain, + unsigned int virq, + irq_hw_number_t hwirq) +{ + struct irq_fwspec fwspec; + + if (irq_domain_get_of_node(domain->parent)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 3; + fwspec.param[0] = GIC_IRQ_TYPE_LPI; + fwspec.param[1] = hwirq; + fwspec.param[2] = IRQ_TYPE_EDGE_RISING; + } else if (is_fwnode_irqchip(domain->parent->fwnode)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 2; + fwspec.param[0] = hwirq; + fwspec.param[1] = IRQ_TYPE_EDGE_RISING; + } else { + return -EINVAL; + } + + return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); +} + +static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *args) +{ + msi_alloc_info_t *info = args; + struct its_device *its_dev = info->scratchpad[0].ptr; + struct its_node *its = its_dev->its; + struct irq_data *irqd; + irq_hw_number_t hwirq; + int err; + int i; + + err = its_alloc_device_irq(its_dev, nr_irqs, &hwirq); + if (err) + return err; + + err = iommu_dma_prepare_msi(info->desc, its->get_msi_base(its_dev)); + if (err) + return err; + + for (i = 0; i < nr_irqs; i++) { + err = its_irq_gic_domain_alloc(domain, virq + i, hwirq + i); + if (err) + return err; + + irq_domain_set_hwirq_and_chip(domain, virq + i, + hwirq + i, &its_irq_chip, its_dev); + irqd = irq_get_irq_data(virq + i); + irqd_set_single_target(irqd); + irqd_set_affinity_on_activate(irqd); + pr_debug("ID:%d pID:%d vID:%d\n", + (int)(hwirq + i - its_dev->event_map.lpi_base), + (int)(hwirq + i), virq + i); + } + + return 0; +} + +static int its_cpumask_first(struct its_device *its_dev, + const struct cpumask *cpu_mask) +{ + unsigned int skt, skt_id, i; + phys_addr_t its_phys_base; + unsigned int cpu, cpus = 0; + + unsigned int skt_cpu_cnt[MAX_MARS3_SKT_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) { + skt_cpu_cnt[skt]++; + } else if (0xff != skt ) { + pr_err("socket address: %d is out of range.", skt); + } + } + + its_phys_base = its_dev->its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + if (0 != skt_id) { + for (i = 0; i < skt_id; i++) { + cpus += skt_cpu_cnt[i]; + } + } + + cpu = cpumask_first(cpu_mask); + if ((cpu > cpus) && (cpu < (cpus + skt_cpu_cnt[skt_id]))) { + cpus = cpu; + } + + return cpus; +} + +static int its_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d, bool reserve) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + const struct cpumask *cpu_mask = cpu_online_mask; + int cpu; + + cpu = its_cpumask_first(its_dev, cpu_mask); + + if (cpu < 0 || cpu >= nr_cpu_ids) + return -EINVAL; + + its_inc_lpi_count(d, cpu); + its_dev->event_map.col_map[event] = cpu; + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + /* Map the GIC IRQ and event to the device */ + its_send_mapti(its_dev, d->hwirq, event); + return 0; +} + +static void its_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + its_dec_lpi_count(d, its_dev->event_map.col_map[event]); + /* Stop the delivery of interrupts */ + its_send_discard(its_dev, event); +} + +static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + struct irq_data *d = irq_domain_get_irq_data(domain, virq); + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_node *its = its_dev->its; + int i; + + bitmap_release_region(its_dev->event_map.lpi_map, + its_get_event_id(irq_domain_get_irq_data(domain, virq)), + get_count_order(nr_irqs)); + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *data = irq_domain_get_irq_data(domain, + virq + i); + /* Nuke the entry in the domain */ + irq_domain_reset_irq_data(data); + } + + mutex_lock(&its->dev_alloc_lock); + + /* + * If all interrupts have been freed, start mopping the + * floor. This is conditionned on the device not being shared. + */ + if (!its_dev->shared && + bitmap_empty(its_dev->event_map.lpi_map, + its_dev->event_map.nr_lpis)) { + its_lpi_free(its_dev->event_map.lpi_map, + its_dev->event_map.lpi_base, + its_dev->event_map.nr_lpis); + + /* Unmap device/itt */ + its_send_mapd(its_dev, 0); + its_free_device(its_dev); + } + + mutex_unlock(&its->dev_alloc_lock); + + irq_domain_free_irqs_parent(domain, virq, nr_irqs); +} + +static const struct irq_domain_ops its_domain_ops = { + .alloc = its_irq_domain_alloc, + .free = its_irq_domain_free, + .activate = its_irq_domain_activate, + .deactivate = its_irq_domain_deactivate, +}; + +/* + * This is insane. + * + * If a GICv4.0 doesn't implement Direct LPIs (which is extremely + * likely), the only way to perform an invalidate is to use a fake + * device to issue an INV command, implying that the LPI has first + * been mapped to some event on that device. Since this is not exactly + * cheap, we try to keep that mapping around as long as possible, and + * only issue an UNMAP if we're short on available slots. + * + * Broken by design(tm). + * + * GICv4.1, on the other hand, mandates that we're able to invalidate + * by writing to a MMIO register. It doesn't implement the whole of + * DirectLPI, but that's good enough. And most of the time, we don't + * even have to invalidate anything, as the redistributor can be told + * whether to generate a doorbell or not (we thus leave it enabled, + * always). + */ +static void its_vpe_db_proxy_unmap_locked(struct its_vpe *vpe) +{ + /* GICv4.1 doesn't use a proxy, so nothing to do here */ + if (gic_rdists->has_rvpeid) + return; + + /* Already unmapped? */ + if (vpe->vpe_proxy_event == -1) + return; + + its_send_discard(vpe_proxy.dev, vpe->vpe_proxy_event); + vpe_proxy.vpes[vpe->vpe_proxy_event] = NULL; + + /* + * We don't track empty slots at all, so let's move the + * next_victim pointer if we can quickly reuse that slot + * instead of nuking an existing entry. Not clear that this is + * always a win though, and this might just generate a ripple + * effect... Let's just hope VPEs don't migrate too often. + */ + if (vpe_proxy.vpes[vpe_proxy.next_victim]) + vpe_proxy.next_victim = vpe->vpe_proxy_event; + + vpe->vpe_proxy_event = -1; +} + +static void its_vpe_db_proxy_unmap(struct its_vpe *vpe) +{ + /* GICv4.1 doesn't use a proxy, so nothing to do here */ + if (gic_rdists->has_rvpeid) + return; + + if (!gic_rdists->has_direct_lpi) { + unsigned long flags; + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + its_vpe_db_proxy_unmap_locked(vpe); + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); + } +} + +static void its_vpe_db_proxy_map_locked(struct its_vpe *vpe) +{ + /* GICv4.1 doesn't use a proxy, so nothing to do here */ + if (gic_rdists->has_rvpeid) + return; + + /* Already mapped? */ + if (vpe->vpe_proxy_event != -1) + return; + + /* This slot was already allocated. Kick the other VPE out. */ + if (vpe_proxy.vpes[vpe_proxy.next_victim]) + its_vpe_db_proxy_unmap_locked(vpe_proxy.vpes[vpe_proxy.next_victim]); + + /* Map the new VPE instead */ + vpe_proxy.vpes[vpe_proxy.next_victim] = vpe; + vpe->vpe_proxy_event = vpe_proxy.next_victim; + vpe_proxy.next_victim = (vpe_proxy.next_victim + 1) % vpe_proxy.dev->nr_ites; + + vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = vpe->col_idx; + its_send_mapti(vpe_proxy.dev, vpe->vpe_db_lpi, vpe->vpe_proxy_event); +} + +static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) +{ + unsigned long flags; + struct its_collection *target_col; + + /* GICv4.1 doesn't use a proxy, so nothing to do here */ + if (gic_rdists->has_rvpeid) + return; + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); + wait_for_syncr(rdbase); + + return; + } + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + + its_vpe_db_proxy_map_locked(vpe); + + target_col = &vpe_proxy.dev->its->collections[to]; + its_send_movi(vpe_proxy.dev, target_col, vpe->vpe_proxy_event); + vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = to; + + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); +} + +static int its_vpe_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, + bool force) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + int from, cpu = cpumask_first(mask_val); + unsigned long flags; + + /* + * Changing affinity is mega expensive, so let's be as lazy as + * we can and only do it if we really have to. Also, if mapped + * into the proxy device, we need to move the doorbell + * interrupt to its new location. + * + * Another thing is that changing the affinity of a vPE affects + * *other interrupts* such as all the vLPIs that are routed to + * this vPE. This means that the irq_desc lock is not enough to + * protect us, and that we must ensure nobody samples vpe->col_idx + * during the update, hence the lock below which must also be + * taken on any vLPI handling path that evaluates vpe->col_idx. + */ + from = vpe_to_cpuid_lock(vpe, &flags); + if (from == cpu) + goto out; + + vpe->col_idx = cpu; + + /* + * GICv4.1 allows us to skip VMOVP if moving to a cpu whose RD + * is sharing its VPE table with the current one. + */ + if (gic_data_rdist_cpu(cpu)->vpe_table_mask && + cpumask_test_cpu(from, gic_data_rdist_cpu(cpu)->vpe_table_mask)) + goto out; + + its_send_vmovp(vpe); + its_vpe_db_proxy_move(vpe, from, cpu); + +out: + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + vpe_to_cpuid_unlock(vpe, flags); + + return IRQ_SET_MASK_OK_DONE; +} + +static void its_wait_vpt_parse_complete(void) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + if (!gic_rdists->has_vpend_valid_dirty) + return; + + WARN_ON_ONCE(readq_relaxed_poll_timeout_atomic(vlpi_base + GICR_VPENDBASER, + val, + !(val & GICR_VPENDBASER_Dirty), + 10, 500)); +} + +static void its_vpe_schedule(struct its_vpe *vpe) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + /* Schedule the VPE */ + val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & + GENMASK_ULL(51, 12); + val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; + val |= GICR_VPROPBASER_RaWb; + val |= GICR_VPROPBASER_InnerShareable; + gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + + val = virt_to_phys(page_address(vpe->vpt_page)) & + GENMASK_ULL(51, 16); + val |= GICR_VPENDBASER_RaWaWb; + val |= GICR_VPENDBASER_InnerShareable; + /* + * There is no good way of finding out if the pending table is + * empty as we can race against the doorbell interrupt very + * easily. So in the end, vpe->pending_last is only an + * indication that the vcpu has something pending, not one + * that the pending table is empty. A good implementation + * would be able to read its coarse map pretty quickly anyway, + * making this a tolerable issue. + */ + val |= GICR_VPENDBASER_PendingLast; + val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; + val |= GICR_VPENDBASER_Valid; + gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); + + its_wait_vpt_parse_complete(); +} + +static void its_vpe_deschedule(struct its_vpe *vpe) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + val = its_clear_vpend_valid(vlpi_base, 0, 0); + + vpe->idai = !!(val & GICR_VPENDBASER_IDAI); + vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); +} + +static void its_vpe_invall(struct its_vpe *vpe) +{ + struct its_node *its; + + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4(its)) + continue; + + if (its_list_map && !vpe->its_vm->vlpi_count[its->list_nr]) + continue; + + /* + * Sending a VINVALL to a single ITS is enough, as all + * we need is to reach the redistributors. + */ + its_send_vinvall(its, vpe); + return; + } +} + +static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + switch (info->cmd_type) { + case SCHEDULE_VPE: + its_vpe_schedule(vpe); + return 0; + + case DESCHEDULE_VPE: + its_vpe_deschedule(vpe); + return 0; + + case INVALL_VPE: + its_vpe_invall(vpe); + return 0; + + default: + return -EINVAL; + } +} + +static void its_vpe_send_cmd(struct its_vpe *vpe, + void (*cmd)(struct its_device *, u32)) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + + its_vpe_db_proxy_map_locked(vpe); + cmd(vpe_proxy.dev, vpe->vpe_proxy_event); + + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); +} + +static void its_vpe_send_inv(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + /* Target the redistributor this VPE is currently known on */ + raw_spin_lock(&gic_data_rdist_cpu(vpe->col_idx)->rd_lock); + rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; + gic_write_lpir(d->parent_data->hwirq, rdbase + GICR_INVLPIR); + wait_for_syncr(rdbase); + raw_spin_unlock(&gic_data_rdist_cpu(vpe->col_idx)->rd_lock); + } else { + its_vpe_send_cmd(vpe, its_send_inv); + } +} + +static void its_vpe_mask_irq(struct irq_data *d) +{ + /* + * We need to unmask the LPI, which is described by the parent + * irq_data. Instead of calling into the parent (which won't + * exactly do the right thing, let's simply use the + * parent_data pointer. Yes, I'm naughty. + */ + lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); + its_vpe_send_inv(d); +} + +static void its_vpe_unmask_irq(struct irq_data *d) +{ + /* Same hack as above... */ + lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); + its_vpe_send_inv(d); +} + +static int its_vpe_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, + bool state) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; + if (state) { + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); + } else { + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); + wait_for_syncr(rdbase); + } + } else { + if (state) + its_vpe_send_cmd(vpe, its_send_int); + else + its_vpe_send_cmd(vpe, its_send_clear); + } + + return 0; +} + +static int its_vpe_retrigger(struct irq_data *d) +{ + return !its_vpe_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); +} + +static struct irq_chip its_vpe_irq_chip = { + .name = "GICv4-vpe", + .irq_mask = its_vpe_mask_irq, + .irq_unmask = its_vpe_unmask_irq, + .irq_eoi = irq_chip_eoi_parent, + .irq_set_affinity = its_vpe_set_affinity, + .irq_retrigger = its_vpe_retrigger, + .irq_set_irqchip_state = its_vpe_set_irqchip_state, + .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, +}; + +static struct its_node *find_4_1_its(void) +{ + static struct its_node *its = NULL; + + if (!its) { + list_for_each_entry(its, &its_nodes, entry) { + if (is_v4_1(its)) + return its; + } + + /* Oops? */ + its = NULL; + } + + return its; +} + +static void its_vpe_4_1_send_inv(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* + * GICv4.1 wants doorbells to be invalidated using the + * INVDB command in order to be broadcast to all RDs. Send + * it to the first valid ITS, and let the HW do its magic. + */ + its = find_4_1_its(); + if (its) + its_send_invdb(its, vpe); +} + +static void its_vpe_4_1_mask_irq(struct irq_data *d) +{ + lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); + its_vpe_4_1_send_inv(d); +} + +static void its_vpe_4_1_unmask_irq(struct irq_data *d) +{ + lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); + its_vpe_4_1_send_inv(d); +} + +static void its_vpe_4_1_schedule(struct its_vpe *vpe, + struct its_cmd_info *info) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val = 0; + + /* Schedule the VPE */ + val |= GICR_VPENDBASER_Valid; + val |= info->g0en ? GICR_VPENDBASER_4_1_VGRP0EN : 0; + val |= info->g1en ? GICR_VPENDBASER_4_1_VGRP1EN : 0; + val |= FIELD_PREP(GICR_VPENDBASER_4_1_VPEID, vpe->vpe_id); + + gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); + + its_wait_vpt_parse_complete(); +} + +static void its_vpe_4_1_deschedule(struct its_vpe *vpe, + struct its_cmd_info *info) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + if (info->req_db) { + unsigned long flags; + + /* + * vPE is going to block: make the vPE non-resident with + * PendingLast clear and DB set. The GIC guarantees that if + * we read-back PendingLast clear, then a doorbell will be + * delivered when an interrupt comes. + * + * Note the locking to deal with the concurrent update of + * pending_last from the doorbell interrupt handler that can + * run concurrently. + */ + raw_spin_lock_irqsave(&vpe->vpe_lock, flags); + val = its_clear_vpend_valid(vlpi_base, + GICR_VPENDBASER_PendingLast, + GICR_VPENDBASER_4_1_DB); + vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); + raw_spin_unlock_irqrestore(&vpe->vpe_lock, flags); + } else { + /* + * We're not blocking, so just make the vPE non-resident + * with PendingLast set, indicating that we'll be back. + */ + val = its_clear_vpend_valid(vlpi_base, + 0, + GICR_VPENDBASER_PendingLast); + vpe->pending_last = true; + } +} + +static void its_vpe_4_1_invall(struct its_vpe *vpe) +{ + void __iomem *rdbase; + unsigned long flags; + u64 val; + int cpu; + + val = GICR_INVALLR_V; + val |= FIELD_PREP(GICR_INVALLR_VPEID, vpe->vpe_id); + + /* Target the redistributor this vPE is currently known on */ + cpu = vpe_to_cpuid_lock(vpe, &flags); + raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); + rdbase = per_cpu_ptr(gic_rdists->rdist, cpu)->rd_base; + gic_write_lpir(val, rdbase + GICR_INVALLR); + + wait_for_syncr(rdbase); + raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); + vpe_to_cpuid_unlock(vpe, flags); +} + +static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + switch (info->cmd_type) { + case SCHEDULE_VPE: + its_vpe_4_1_schedule(vpe, info); + return 0; + + case DESCHEDULE_VPE: + its_vpe_4_1_deschedule(vpe, info); + return 0; + + case INVALL_VPE: + its_vpe_4_1_invall(vpe); + return 0; + + default: + return -EINVAL; + } +} + +static struct irq_chip its_vpe_4_1_irq_chip = { + .name = "GICv4.1-vpe", + .irq_mask = its_vpe_4_1_mask_irq, + .irq_unmask = its_vpe_4_1_unmask_irq, + .irq_eoi = irq_chip_eoi_parent, + .irq_set_affinity = its_vpe_set_affinity, + .irq_set_vcpu_affinity = its_vpe_4_1_set_vcpu_affinity, +}; + +static void its_configure_sgi(struct irq_data *d, bool clear) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_cmd_desc desc; + + desc.its_vsgi_cmd.vpe = vpe; + desc.its_vsgi_cmd.sgi = d->hwirq; + desc.its_vsgi_cmd.priority = vpe->sgi_config[d->hwirq].priority; + desc.its_vsgi_cmd.enable = vpe->sgi_config[d->hwirq].enabled; + desc.its_vsgi_cmd.group = vpe->sgi_config[d->hwirq].group; + desc.its_vsgi_cmd.clear = clear; + + /* + * GICv4.1 allows us to send VSGI commands to any ITS as long as the + * destination VPE is mapped there. Since we map them eagerly at + * activation time, we're pretty sure the first GICv4.1 ITS will do. + */ + its_send_single_vcommand(find_4_1_its(), its_build_vsgi_cmd, &desc); +} + +static void its_sgi_mask_irq(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + vpe->sgi_config[d->hwirq].enabled = false; + its_configure_sgi(d, false); +} + +static void its_sgi_unmask_irq(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + vpe->sgi_config[d->hwirq].enabled = true; + its_configure_sgi(d, false); +} + +static int its_sgi_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, + bool force) +{ + /* + * There is no notion of affinity for virtual SGIs, at least + * not on the host (since they can only be targetting a vPE). + * Tell the kernel we've done whatever it asked for. + */ + irq_data_update_effective_affinity(d, mask_val); + return IRQ_SET_MASK_OK; +} + +static int its_sgi_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, + bool state) +{ + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (state) { + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its = find_4_1_its(); + u64 val; + + val = FIELD_PREP(GITS_SGIR_VPEID, vpe->vpe_id); + val |= FIELD_PREP(GITS_SGIR_VINTID, d->hwirq); + writeq_relaxed(val, its->sgir_base + GITS_SGIR - SZ_128K); + } else { + its_configure_sgi(d, true); + } + + return 0; +} + +static int its_sgi_get_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, bool *val) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + void __iomem *base; + unsigned long flags; + u32 count = 1000000; /* 1s! */ + u32 status; + int cpu; + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + /* + * Locking galore! We can race against two different events: + * + * - Concurent vPE affinity change: we must make sure it cannot + * happen, or we'll talk to the wrong redistributor. This is + * identical to what happens with vLPIs. + * + * - Concurrent VSGIPENDR access: As it involves accessing two + * MMIO registers, this must be made atomic one way or another. + */ + cpu = vpe_to_cpuid_lock(vpe, &flags); + raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); + base = gic_data_rdist_cpu(cpu)->rd_base + SZ_128K; + writel_relaxed(vpe->vpe_id, base + GICR_VSGIR); + do { + status = readl_relaxed(base + GICR_VSGIPENDR); + if (!(status & GICR_VSGIPENDR_BUSY)) + goto out; + + count--; + if (!count) { + pr_err_ratelimited("Unable to get SGI status\n"); + goto out; + } + cpu_relax(); + udelay(1); + } while (count); + +out: + raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); + vpe_to_cpuid_unlock(vpe, flags); + + if (!count) + return -ENXIO; + + *val = !!(status & (1 << d->hwirq)); + + return 0; +} + +static int its_sgi_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + switch (info->cmd_type) { + case PROP_UPDATE_VSGI: + vpe->sgi_config[d->hwirq].priority = info->priority; + vpe->sgi_config[d->hwirq].group = info->group; + its_configure_sgi(d, false); + return 0; + + default: + return -EINVAL; + } +} + +static struct irq_chip its_sgi_irq_chip = { + .name = "GICv4.1-sgi", + .irq_mask = its_sgi_mask_irq, + .irq_unmask = its_sgi_unmask_irq, + .irq_set_affinity = its_sgi_set_affinity, + .irq_set_irqchip_state = its_sgi_set_irqchip_state, + .irq_get_irqchip_state = its_sgi_get_irqchip_state, + .irq_set_vcpu_affinity = its_sgi_set_vcpu_affinity, +}; + +static int its_sgi_irq_domain_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *args) +{ + struct its_vpe *vpe = args; + int i; + + /* Yes, we do want 16 SGIs */ + WARN_ON(nr_irqs != 16); + + for (i = 0; i < 16; i++) { + vpe->sgi_config[i].priority = 0; + vpe->sgi_config[i].enabled = false; + vpe->sgi_config[i].group = false; + + irq_domain_set_hwirq_and_chip(domain, virq + i, i, + &its_sgi_irq_chip, vpe); + irq_set_status_flags(virq + i, IRQ_DISABLE_UNLAZY); + } + + return 0; +} + +static void its_sgi_irq_domain_free(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs) +{ + /* Nothing to do */ +} + +static int its_sgi_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d, bool reserve) +{ + /* Write out the initial SGI configuration */ + its_configure_sgi(d, false); + return 0; +} + +static void its_sgi_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + /* + * The VSGI command is awkward: + * + * - To change the configuration, CLEAR must be set to false, + * leaving the pending bit unchanged. + * - To clear the pending bit, CLEAR must be set to true, leaving + * the configuration unchanged. + * + * You just can't do both at once, hence the two commands below. + */ + vpe->sgi_config[d->hwirq].enabled = false; + its_configure_sgi(d, false); + its_configure_sgi(d, true); +} + +static const struct irq_domain_ops its_sgi_domain_ops = { + .alloc = its_sgi_irq_domain_alloc, + .free = its_sgi_irq_domain_free, + .activate = its_sgi_irq_domain_activate, + .deactivate = its_sgi_irq_domain_deactivate, +}; + +static int its_vpe_id_alloc(void) +{ + return ida_simple_get(&its_vpeid_ida, 0, ITS_MAX_VPEID, GFP_KERNEL); +} + +static void its_vpe_id_free(u16 id) +{ + ida_simple_remove(&its_vpeid_ida, id); +} + +static int its_vpe_init(struct its_vpe *vpe) +{ + struct page *vpt_page; + int vpe_id; + + /* Allocate vpe_id */ + vpe_id = its_vpe_id_alloc(); + if (vpe_id < 0) + return vpe_id; + + /* Allocate VPT */ + vpt_page = its_allocate_pending_table(GFP_KERNEL); + if (!vpt_page) { + its_vpe_id_free(vpe_id); + return -ENOMEM; + } + + if (!its_alloc_vpe_table(vpe_id)) { + its_vpe_id_free(vpe_id); + its_free_pending_table(vpt_page); + return -ENOMEM; + } + + raw_spin_lock_init(&vpe->vpe_lock); + vpe->vpe_id = vpe_id; + vpe->vpt_page = vpt_page; + if (gic_rdists->has_rvpeid) + atomic_set(&vpe->vmapp_count, 0); + else + vpe->vpe_proxy_event = -1; + + return 0; +} + +static void its_vpe_teardown(struct its_vpe *vpe) +{ + its_vpe_db_proxy_unmap(vpe); + its_vpe_id_free(vpe->vpe_id); + its_free_pending_table(vpe->vpt_page); +} + +static void its_vpe_irq_domain_free(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs) +{ + struct its_vm *vm = domain->host_data; + int i; + + irq_domain_free_irqs_parent(domain, virq, nr_irqs); + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *data = irq_domain_get_irq_data(domain, + virq + i); + struct its_vpe *vpe = irq_data_get_irq_chip_data(data); + + BUG_ON(vm != vpe->its_vm); + + clear_bit(data->hwirq, vm->db_bitmap); + its_vpe_teardown(vpe); + irq_domain_reset_irq_data(data); + } + + if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { + its_lpi_free(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); + its_free_prop_table(vm->vprop_page); + } +} + +static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *args) +{ + struct irq_chip *irqchip = &its_vpe_irq_chip; + struct its_vm *vm = args; + unsigned long *bitmap; + struct page *vprop_page; + int base, nr_ids, i, err = 0; + + BUG_ON(!vm); + + bitmap = its_lpi_alloc(roundup_pow_of_two(nr_irqs), &base, &nr_ids); + if (!bitmap) + return -ENOMEM; + + if (nr_ids < nr_irqs) { + its_lpi_free(bitmap, base, nr_ids); + return -ENOMEM; + } + + vprop_page = its_allocate_prop_table(GFP_KERNEL); + if (!vprop_page) { + its_lpi_free(bitmap, base, nr_ids); + return -ENOMEM; + } + + vm->db_bitmap = bitmap; + vm->db_lpi_base = base; + vm->nr_db_lpis = nr_ids; + vm->vprop_page = vprop_page; + + if (gic_rdists->has_rvpeid) + irqchip = &its_vpe_4_1_irq_chip; + + for (i = 0; i < nr_irqs; i++) { + vm->vpes[i]->vpe_db_lpi = base + i; + err = its_vpe_init(vm->vpes[i]); + if (err) + break; + err = its_irq_gic_domain_alloc(domain, virq + i, + vm->vpes[i]->vpe_db_lpi); + if (err) + break; + irq_domain_set_hwirq_and_chip(domain, virq + i, i, + irqchip, vm->vpes[i]); + set_bit(i, bitmap); + } + + if (err) { + if (i > 0) + its_vpe_irq_domain_free(domain, virq, i - 1); + + its_lpi_free(bitmap, base, nr_ids); + its_free_prop_table(vprop_page); + } + + return err; +} + +static int its_vpe_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d, bool reserve) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* + * If we use the list map, we issue VMAPP on demand... Unless + * we're on a GICv4.1 and we eagerly map the VPE on all ITSs + * so that VSGIs can work. + */ + if (!gic_requires_eager_mapping()) + return 0; + + /* Map the VPE to the first possible CPU */ + vpe->col_idx = cpumask_first(cpu_online_mask); + + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4(its)) + continue; + + its_send_vmapp(its, vpe, true); + its_send_vinvall(its, vpe); + } + + irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); + + return 0; +} + +static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* + * If we use the list map on GICv4.0, we unmap the VPE once no + * VLPIs are associated with the VM. + */ + if (!gic_requires_eager_mapping()) + return; + + list_for_each_entry(its, &its_nodes, entry) { + if (!is_v4(its)) + continue; + + its_send_vmapp(its, vpe, false); + } +} + +static const struct irq_domain_ops its_vpe_domain_ops = { + .alloc = its_vpe_irq_domain_alloc, + .free = its_vpe_irq_domain_free, + .activate = its_vpe_irq_domain_activate, + .deactivate = its_vpe_irq_domain_deactivate, +}; + +static int its_force_quiescent(void __iomem *base) +{ + u32 count = 1000000; /* 1s */ + u32 val; + + val = readl_relaxed(base + GITS_CTLR); + /* + * GIC architecture specification requires the ITS to be both + * disabled and quiescent for writes to GITS_BASER<n> or + * GITS_CBASER to not have UNPREDICTABLE results. + */ + if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) + return 0; + + /* Disable the generation of all interrupts to this ITS */ + val &= ~(GITS_CTLR_ENABLE | GITS_CTLR_ImDe); + writel_relaxed(val, base + GITS_CTLR); + + /* Poll GITS_CTLR and wait until ITS becomes quiescent */ + while (1) { + val = readl_relaxed(base + GITS_CTLR); + if (val & GITS_CTLR_QUIESCENT) + return 0; + + count--; + if (!count) + return -EBUSY; + + cpu_relax(); + udelay(1); + } +} + +static bool __maybe_unused its_enable_quirk_cavium_22375(void *data) +{ + struct its_node *its = data; + + /* erratum 22375: only alloc 8MB table size (20 bits) */ + its->typer &= ~GITS_TYPER_DEVBITS; + its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, 20 - 1); + its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; + + return true; +} + +static bool __maybe_unused its_enable_quirk_cavium_23144(void *data) +{ + struct its_node *its = data; + + its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; + + return true; +} + +static bool __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) +{ + struct its_node *its = data; + + /* On QDF2400, the size of the ITE is 16Bytes */ + its->typer &= ~GITS_TYPER_ITT_ENTRY_SIZE; + its->typer |= FIELD_PREP(GITS_TYPER_ITT_ENTRY_SIZE, 16 - 1); + + return true; +} + +static u64 its_irq_get_msi_base_pre_its(struct its_device *its_dev) +{ + struct its_node *its = its_dev->its; + + /* + * The Socionext Synquacer SoC has a so-called 'pre-ITS', + * which maps 32-bit writes targeted at a separate window of + * size '4 << device_id_bits' onto writes to GITS_TRANSLATER + * with device ID taken from bits [device_id_bits + 1:2] of + * the window offset. + */ + return its->pre_its_base + (its_dev->device_id << 2); +} + +static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data) +{ + struct its_node *its = data; + u32 pre_its_window[2]; + u32 ids; + + if (!fwnode_property_read_u32_array(its->fwnode_handle, + "socionext,synquacer-pre-its", + pre_its_window, + ARRAY_SIZE(pre_its_window))) { + + its->pre_its_base = pre_its_window[0]; + its->get_msi_base = its_irq_get_msi_base_pre_its; + + ids = ilog2(pre_its_window[1]) - 2; + if (device_ids(its) > ids) { + its->typer &= ~GITS_TYPER_DEVBITS; + its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, ids - 1); + } + + /* the pre-ITS breaks isolation, so disable MSI remapping */ + its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP; + return true; + } + return false; +} + +static bool __maybe_unused its_enable_quirk_hip07_161600802(void *data) +{ + struct its_node *its = data; + + /* + * Hip07 insists on using the wrong address for the VLPI + * page. Trick it into doing the right thing... + */ + its->vlpi_redist_offset = SZ_128K; + return true; +} + +static const struct gic_quirk its_quirks[] = { +#ifdef CONFIG_CAVIUM_ERRATUM_22375 + { + .desc = "ITS: Cavium errata 22375, 24313", + .iidr = 0xa100034c, /* ThunderX pass 1.x */ + .mask = 0xffff0fff, + .init = its_enable_quirk_cavium_22375, + }, +#endif +#ifdef CONFIG_CAVIUM_ERRATUM_23144 + { + .desc = "ITS: Cavium erratum 23144", + .iidr = 0xa100034c, /* ThunderX pass 1.x */ + .mask = 0xffff0fff, + .init = its_enable_quirk_cavium_23144, + }, +#endif +#ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 + { + .desc = "ITS: QDF2400 erratum 0065", + .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ + .mask = 0xffffffff, + .init = its_enable_quirk_qdf2400_e0065, + }, +#endif +#ifdef CONFIG_SOCIONEXT_SYNQUACER_PREITS + { + /* + * The Socionext Synquacer SoC incorporates ARM's own GIC-500 + * implementation, but with a 'pre-ITS' added that requires + * special handling in software. + */ + .desc = "ITS: Socionext Synquacer pre-ITS", + .iidr = 0x0001143b, + .mask = 0xffffffff, + .init = its_enable_quirk_socionext_synquacer, + }, +#endif +#ifdef CONFIG_HISILICON_ERRATUM_161600802 + { + .desc = "ITS: Hip07 erratum 161600802", + .iidr = 0x00000004, + .mask = 0xffffffff, + .init = its_enable_quirk_hip07_161600802, + }, +#endif + { + } +}; + +static void its_enable_quirks(struct its_node *its) +{ + u32 iidr = readl_relaxed(its->base + GITS_IIDR); + + gic_enable_quirks(iidr, its_quirks, its); +} + +static int its_save_disable(void) +{ + struct its_node *its; + int err = 0; + + raw_spin_lock(&its_lock); + list_for_each_entry(its, &its_nodes, entry) { + void __iomem *base; + + base = its->base; + its->ctlr_save = readl_relaxed(base + GITS_CTLR); + err = its_force_quiescent(base); + if (err) { + pr_err("ITS@%pa: failed to quiesce: %d\n", + &its->phys_base, err); + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + goto err; + } + + its->cbaser_save = gits_read_cbaser(base + GITS_CBASER); + } + +err: + if (err) { + list_for_each_entry_continue_reverse(its, &its_nodes, entry) { + void __iomem *base; + + base = its->base; + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + } + } + raw_spin_unlock(&its_lock); + + return err; +} + +static void its_restore_enable(void) +{ + struct its_node *its; + int ret; + + raw_spin_lock(&its_lock); + list_for_each_entry(its, &its_nodes, entry) { + void __iomem *base; + int i; + + base = its->base; + + /* + * Make sure that the ITS is disabled. If it fails to quiesce, + * don't restore it since writing to CBASER or BASER<n> + * registers is undefined according to the GIC v3 ITS + * Specification. + * + * Firmware resuming with the ITS enabled is terminally broken. + */ + WARN_ON(readl_relaxed(base + GITS_CTLR) & GITS_CTLR_ENABLE); + ret = its_force_quiescent(base); + if (ret) { + pr_err("ITS@%pa: failed to quiesce on resume: %d\n", + &its->phys_base, ret); + continue; + } + + gits_write_cbaser(its->cbaser_save, base + GITS_CBASER); + + /* + * Writing CBASER resets CREADR to 0, so make CWRITER and + * cmd_write line up with it. + */ + its->cmd_write = its->cmd_base; + gits_write_cwriter(0, base + GITS_CWRITER); + + /* Restore GITS_BASER from the value cache. */ + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + struct its_baser *baser = &its->tables[i]; + + if (!(baser->val & GITS_BASER_VALID)) + continue; + + its_write_baser(its, baser, baser->val); + } + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + + /* + * Reinit the collection if it's stored in the ITS. This is + * indicated by the col_id being less than the HCC field. + * CID < HCC as specified in the GIC v3 Documentation. + */ + if (its->collections[smp_processor_id()].col_id < + GITS_TYPER_HCC(gic_read_typer(base + GITS_TYPER))) + its_cpu_init_collection(its); + } + raw_spin_unlock(&its_lock); +} + +static struct syscore_ops its_syscore_ops = { + .suspend = its_save_disable, + .resume = its_restore_enable, +}; + +static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) +{ + struct irq_domain *inner_domain; + struct msi_domain_info *info; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); + if (!inner_domain) { + kfree(info); + return -ENOMEM; + } + + inner_domain->parent = its_parent; + irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); + inner_domain->flags |= its->msi_domain_flags; + info->ops = &its_msi_domain_ops; + info->data = its; + inner_domain->host_data = info; + + return 0; +} + +static int its_init_vpe_domain(void) +{ + struct its_node *its; + u32 devid; + int entries; + + if (gic_rdists->has_direct_lpi) { + pr_info("ITS: Using DirectLPI for VPE invalidation\n"); + return 0; + } + + /* Any ITS will do, even if not v4 */ + its = list_first_entry(&its_nodes, struct its_node, entry); + + entries = roundup_pow_of_two(nr_cpu_ids); + vpe_proxy.vpes = kcalloc(entries, sizeof(*vpe_proxy.vpes), + GFP_KERNEL); + if (!vpe_proxy.vpes) { + pr_err("ITS: Can't allocate GICv4 proxy device array\n"); + return -ENOMEM; + } + + /* Use the last possible DevID */ + devid = GENMASK(device_ids(its) - 1, 0); + vpe_proxy.dev = its_create_device(its, devid, entries, false); + if (!vpe_proxy.dev) { + kfree(vpe_proxy.vpes); + pr_err("ITS: Can't allocate GICv4 proxy device\n"); + return -ENOMEM; + } + + BUG_ON(entries > vpe_proxy.dev->nr_ites); + + raw_spin_lock_init(&vpe_proxy.lock); + vpe_proxy.next_victim = 0; + pr_info("ITS: Allocated DevID %x as GICv4 proxy device (%d slots)\n", + devid, vpe_proxy.dev->nr_ites); + + return 0; +} + +static int __init its_compute_its_list_map(struct resource *res, + void __iomem *its_base) +{ + int its_number; + u32 ctlr; + + /* + * This is assumed to be done early enough that we're + * guaranteed to be single-threaded, hence no + * locking. Should this change, we should address + * this. + */ + its_number = find_first_zero_bit(&its_list_map, GICv4_ITS_LIST_MAX); + if (its_number >= GICv4_ITS_LIST_MAX) { + pr_err("ITS@%pa: No ITSList entry available!\n", + &res->start); + return -EINVAL; + } + + ctlr = readl_relaxed(its_base + GITS_CTLR); + ctlr &= ~GITS_CTLR_ITS_NUMBER; + ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; + writel_relaxed(ctlr, its_base + GITS_CTLR); + ctlr = readl_relaxed(its_base + GITS_CTLR); + if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { + its_number = ctlr & GITS_CTLR_ITS_NUMBER; + its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; + } + + if (test_and_set_bit(its_number, &its_list_map)) { + pr_err("ITS@%pa: Duplicate ITSList entry %d\n", + &res->start, its_number); + return -EINVAL; + } + + return its_number; +} + +static int __init its_probe_one(struct resource *res, + struct fwnode_handle *handle, int numa_node) +{ + struct its_node *its; + void __iomem *its_base; + u32 val, ctlr; + u64 baser, tmp, typer; + struct page *page; + int err; + + its_base = ioremap(res->start, SZ_64K); + if (!its_base) { + pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); + return -ENOMEM; + } + + val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; + if (val != 0x30 && val != 0x40) { + pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); + err = -ENODEV; + goto out_unmap; + } + + err = its_force_quiescent(its_base); + if (err) { + pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); + goto out_unmap; + } + + pr_info("ITS %pR\n", res); + + its = kzalloc(sizeof(*its), GFP_KERNEL); + if (!its) { + err = -ENOMEM; + goto out_unmap; + } + + raw_spin_lock_init(&its->lock); + mutex_init(&its->dev_alloc_lock); + INIT_LIST_HEAD(&its->entry); + INIT_LIST_HEAD(&its->its_device_list); + typer = gic_read_typer(its_base + GITS_TYPER); + its->typer = typer; + its->base = its_base; + its->phys_base = res->start; + if (is_v4(its)) { + if (!(typer & GITS_TYPER_VMOVP)) { + err = its_compute_its_list_map(res, its_base); + if (err < 0) + goto out_free_its; + + its->list_nr = err; + + pr_info("ITS@%pa: Using ITS number %d\n", + &res->start, err); + } else { + pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); + } + + if (is_v4_1(its)) { + u32 svpet = FIELD_GET(GITS_TYPER_SVPET, typer); + + its->sgir_base = ioremap(res->start + SZ_128K, SZ_64K); + if (!its->sgir_base) { + err = -ENOMEM; + goto out_free_its; + } + + its->mpidr = readl_relaxed(its_base + GITS_MPIDR); + + pr_info("ITS@%pa: Using GICv4.1 mode %08x %08x\n", + &res->start, its->mpidr, svpet); + } + } + + its->numa_node = numa_node; + + page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, + get_order(ITS_CMD_QUEUE_SZ)); + if (!page) { + err = -ENOMEM; + goto out_unmap_sgir; + } + its->cmd_base = (void *)page_address(page); + its->cmd_write = its->cmd_base; + its->fwnode_handle = handle; + its->get_msi_base = its_irq_get_msi_base; + its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP; + + its_enable_quirks(its); + + err = its_alloc_tables(its); + if (err) + goto out_free_cmd; + + err = its_alloc_collections(its); + if (err) + goto out_free_tables; + + baser = (virt_to_phys(its->cmd_base) | + GITS_CBASER_RaWaWb | + GITS_CBASER_InnerShareable | + (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | + GITS_CBASER_VALID); + + gits_write_cbaser(baser, its->base + GITS_CBASER); + tmp = gits_read_cbaser(its->base + GITS_CBASER); + + if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { + if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must + * remove the cacheability attributes as + * well. + */ + baser &= ~(GITS_CBASER_SHAREABILITY_MASK | + GITS_CBASER_CACHEABILITY_MASK); + baser |= GITS_CBASER_nC; + gits_write_cbaser(baser, its->base + GITS_CBASER); + } + pr_info("ITS: using cache flushing for cmd queue\n"); + its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; + } + + gits_write_cwriter(0, its->base + GITS_CWRITER); + ctlr = readl_relaxed(its->base + GITS_CTLR); + ctlr |= GITS_CTLR_ENABLE; + if (is_v4(its)) + ctlr |= GITS_CTLR_ImDe; + writel_relaxed(ctlr, its->base + GITS_CTLR); + + err = its_init_domain(handle, its); + if (err) + goto out_free_tables; + + raw_spin_lock(&its_lock); + list_add(&its->entry, &its_nodes); + raw_spin_unlock(&its_lock); + + return 0; + +out_free_tables: + its_free_tables(its); +out_free_cmd: + free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); +out_unmap_sgir: + if (its->sgir_base) + iounmap(its->sgir_base); +out_free_its: + kfree(its); +out_unmap: + iounmap(its_base); + pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); + return err; +} + +static bool gic_rdists_supports_plpis(void) +{ + return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); +} + +static int redist_disable_lpis(void) +{ + void __iomem *rbase = gic_data_rdist_rd_base(); + u64 timeout = USEC_PER_SEC; + u64 val; + + if (!gic_rdists_supports_plpis()) { + pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); + return -ENXIO; + } + + val = readl_relaxed(rbase + GICR_CTLR); + if (!(val & GICR_CTLR_ENABLE_LPIS)) + return 0; + + /* + * If coming via a CPU hotplug event, we don't need to disable + * LPIs before trying to re-enable them. They are already + * configured and all is well in the world. + * + * If running with preallocated tables, there is nothing to do. + */ + if (gic_data_rdist()->lpi_enabled || + (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED)) + return 0; + + /* + * From that point on, we only try to do some damage control. + */ + pr_warn("GICv3: CPU%d: Booted with LPIs enabled, memory probably corrupted\n", + smp_processor_id()); + add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); + + /* Disable LPIs */ + val &= ~GICR_CTLR_ENABLE_LPIS; + writel_relaxed(val, rbase + GICR_CTLR); + + /* Make sure any change to GICR_CTLR is observable by the GIC */ + dsb(sy); + + /* + * Software must observe RWP==0 after clearing GICR_CTLR.EnableLPIs + * from 1 to 0 before programming GICR_PEND{PROP}BASER registers. + * Error out if we time out waiting for RWP to clear. + */ + while (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_RWP) { + if (!timeout) { + pr_err("CPU%d: Timeout while disabling LPIs\n", + smp_processor_id()); + return -ETIMEDOUT; + } + udelay(1); + timeout--; + } + + /* + * After it has been written to 1, it is IMPLEMENTATION + * DEFINED whether GICR_CTLR.EnableLPI becomes RES1 or can be + * cleared to 0. Error out if clearing the bit failed. + */ + if (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_ENABLE_LPIS) { + pr_err("CPU%d: Failed to disable LPIs\n", smp_processor_id()); + return -EBUSY; + } + + return 0; +} + +int phytium_its_cpu_init(void) +{ + if (!list_empty(&its_nodes)) { + int ret; + + ret = redist_disable_lpis(); + if (ret) + return ret; + + its_cpu_init_lpis(); + its_cpu_init_collections(); + } + + return 0; +} + +static const struct of_device_id its_device_id[] = { + { .compatible = "arm,gic-v3-its", }, + {}, +}; + +static int __init its_of_probe(struct device_node *node) +{ + struct device_node *np; + struct resource res; + + for (np = of_find_matching_node(node, its_device_id); np; + np = of_find_matching_node(np, its_device_id)) { + if (!of_device_is_available(np)) + continue; + if (!of_property_read_bool(np, "msi-controller")) { + pr_warn("%pOF: no msi-controller property, ITS ignored\n", + np); + continue; + } + + if (of_address_to_resource(np, 0, &res)) { + pr_warn("%pOF: no regs?\n", np); + continue; + } + + its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); + } + return 0; +} + +#ifdef CONFIG_ACPI + +#define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) + +#ifdef CONFIG_ACPI_NUMA +struct its_srat_map { + /* numa node id */ + u32 numa_node; + /* GIC ITS ID */ + u32 its_id; +}; + +static struct its_srat_map *its_srat_maps __initdata; +static int its_in_srat __initdata; + +static int __init acpi_get_its_numa_node(u32 its_id) +{ + int i; + + for (i = 0; i < its_in_srat; i++) { + if (its_id == its_srat_maps[i].its_id) + return its_srat_maps[i].numa_node; + } + return NUMA_NO_NODE; +} + +static int __init gic_acpi_match_srat_its(union acpi_subtable_headers *header, + const unsigned long end) +{ + return 0; +} + +static int __init gic_acpi_parse_srat_its(union acpi_subtable_headers *header, + const unsigned long end) +{ + int node; + struct acpi_srat_gic_its_affinity *its_affinity; + + its_affinity = (struct acpi_srat_gic_its_affinity *)header; + if (!its_affinity) + return -EINVAL; + + if (its_affinity->header.length < sizeof(*its_affinity)) { + pr_err("SRAT: Invalid header length %d in ITS affinity\n", + its_affinity->header.length); + return -EINVAL; + } + + /* + * Note that in theory a new proximity node could be created by this + * entry as it is an SRAT resource allocation structure. + * We do not currently support doing so. + */ + node = pxm_to_node(its_affinity->proximity_domain); + + if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { + pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); + return 0; + } + + its_srat_maps[its_in_srat].numa_node = node; + its_srat_maps[its_in_srat].its_id = its_affinity->its_id; + its_in_srat++; + pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", + its_affinity->proximity_domain, its_affinity->its_id, node); + + return 0; +} + +static void __init acpi_table_parse_srat_its(void) +{ + int count; + + count = acpi_table_parse_entries(ACPI_SIG_SRAT, + sizeof(struct acpi_table_srat), + ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, + gic_acpi_match_srat_its, 0); + if (count <= 0) + return; + + its_srat_maps = kmalloc_array(count, sizeof(struct its_srat_map), + GFP_KERNEL); + if (!its_srat_maps) { + pr_warn("SRAT: Failed to allocate memory for its_srat_maps!\n"); + return; + } + + acpi_table_parse_entries(ACPI_SIG_SRAT, + sizeof(struct acpi_table_srat), + ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, + gic_acpi_parse_srat_its, 0); +} + +/* free the its_srat_maps after ITS probing */ +static void __init acpi_its_srat_maps_free(void) +{ + kfree(its_srat_maps); +} +#else +static void __init acpi_table_parse_srat_its(void) { } +static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } +static void __init acpi_its_srat_maps_free(void) { } +#endif + +static int __init gic_acpi_parse_madt_its(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *dom_handle; + struct resource res; + int err; + + its_entry = (struct acpi_madt_generic_translator *)header; + memset(&res, 0, sizeof(res)); + res.start = its_entry->base_address; + res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; + res.flags = IORESOURCE_MEM; + + dom_handle = irq_domain_alloc_fwnode(&res.start); + if (!dom_handle) { + pr_err("ITS@%pa: Unable to allocate GIC-phytium-2500 ITS domain token\n", + &res.start); + return -ENOMEM; + } + + err = iort_register_domain_token(its_entry->translation_id, res.start, + dom_handle); + if (err) { + pr_err("ITS@%pa: Unable to register GIC-phytium-2500 ITS domain token (ITS ID %d) to IORT\n", + &res.start, its_entry->translation_id); + goto dom_err; + } + + err = its_probe_one(&res, dom_handle, + acpi_get_its_numa_node(its_entry->translation_id)); + if (!err) + return 0; + + iort_deregister_domain_token(its_entry->translation_id); +dom_err: + irq_domain_free_fwnode(dom_handle); + return err; +} + +static void __init its_acpi_probe(void) +{ + acpi_table_parse_srat_its(); + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + gic_acpi_parse_madt_its, 0); + acpi_its_srat_maps_free(); +} +#else +static void __init its_acpi_probe(void) { } +#endif + +int __init phytium_its_init(struct fwnode_handle *handle, struct rdists *rdists, + struct irq_domain *parent_domain) +{ + struct device_node *of_node; + struct its_node *its; + bool has_v4 = false; + bool has_v4_1 = false; + int err; + + gic_rdists = rdists; + + its_parent = parent_domain; + of_node = to_of_node(handle); + if (of_node) + its_of_probe(of_node); + else + its_acpi_probe(); + + if (list_empty(&its_nodes)) { + pr_warn("ITS: No ITS available, not enabling LPIs\n"); + return -ENXIO; + } + + err = allocate_lpi_tables(); + if (err) + return err; + + list_for_each_entry(its, &its_nodes, entry) { + has_v4 |= is_v4(its); + has_v4_1 |= is_v4_1(its); + } + + /* Don't bother with inconsistent systems */ + if (WARN_ON(!has_v4_1 && rdists->has_rvpeid)) + rdists->has_rvpeid = false; + + if (has_v4 & rdists->has_vlpis) { + const struct irq_domain_ops *sgi_ops; + + if (has_v4_1) + sgi_ops = &its_sgi_domain_ops; + else + sgi_ops = NULL; + + if (its_init_vpe_domain() || + its_init_v4(parent_domain, &its_vpe_domain_ops, sgi_ops)) { + rdists->has_vlpis = false; + pr_err("ITS: Disabling GICv4 support\n"); + } + } + + register_syscore_ops(&its_syscore_ops); + + return 0; +} diff --git a/drivers/irqchip/irq-gic-phytium-2500.c b/drivers/irqchip/irq-gic-phytium-2500.c new file mode 100644 index 0000000..e30743b --- /dev/null +++ b/drivers/irqchip/irq-gic-phytium-2500.c @@ -0,0 +1,2503 @@ +/* + * Copyright (C) 2020 Phytium Corporation. + * Author: Wang Yinfeng &lt;wangyinfeng(a)phytium.com.cn&gt; + * Chen Baozi &lt;chenbaozi(a)phytium.com.cn&gt; + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + + +#define pr_fmt(fmt) "GIC-2500: " fmt + +#include <linux/acpi.h> +#include <linux/cpu.h> +#include <linux/cpu_pm.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/percpu.h> +#include <linux/refcount.h> +#include <linux/slab.h> + +#include <linux/irqchip.h> +#include <linux/irqchip/arm-gic-common.h> +#include <linux/irqchip/arm-gic-phytium-2500.h> +#include <linux/irqchip/irq-partition-percpu.h> + +#include <asm/cputype.h> +#include <asm/exception.h> +#include <asm/smp_plat.h> +#include <asm/virt.h> + +#include "irq-gic-common.h" + +#define MAX_MARS3_SOC_COUNT 8 +#define MARS3_ADDR_SKTID_SHIFT 41 + +struct gic_dist_desc { + void __iomem *dist_base; + phys_addr_t phys_base; + unsigned long size; + +}; + +static struct gic_dist_desc mars3_gic_dists[MAX_MARS3_SOC_COUNT] __read_mostly; + +static unsigned int mars3_sockets_bitmap = 0x1; + +#define mars3_irq_to_skt(hwirq) (((hwirq) - 32) % 8) + +#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80) + +#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0) +#define FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539 (1ULL << 1) + +#define GIC_IRQ_TYPE_PARTITION (GIC_IRQ_TYPE_LPI + 1) + +struct redist_region { + void __iomem *redist_base; + phys_addr_t phys_base; + bool single_redist; +}; + +struct gic_chip_data { + struct fwnode_handle *fwnode; + void __iomem *dist_base; + struct redist_region *redist_regions; + struct rdists rdists; + struct irq_domain *domain; + u64 redist_stride; + u32 nr_redist_regions; + u64 flags; + bool has_rss; + unsigned int ppi_nr; + struct partition_desc **ppi_descs; +}; + +static struct gic_chip_data gic_data __read_mostly; +static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key); + +#define GIC_ID_NR (1U << GICD_TYPER_ID_BITS(gic_data.rdists.gicd_typer)) +#define GIC_LINE_NR min(GICD_TYPER_SPIS(gic_data.rdists.gicd_typer), 1020U) +#define GIC_ESPI_NR GICD_TYPER_ESPIS(gic_data.rdists.gicd_typer) + +/* + * The behaviours of RPR and PMR registers differ depending on the value of + * SCR_EL3.FIQ, and the behaviour of non-secure priority registers of the + * distributor and redistributors depends on whether security is enabled in the + * GIC. + * + * When security is enabled, non-secure priority values from the (re)distributor + * are presented to the GIC CPUIF as follow: + * (GIC_(R)DIST_PRI[irq] >> 1) | 0x80; + * + * If SCR_EL3.FIQ == 1, the values writen to/read from PMR and RPR at non-secure + * EL1 are subject to a similar operation thus matching the priorities presented + * from the (re)distributor when security is enabled. When SCR_EL3.FIQ == 0, + * these values are unchanched by the GIC. + * + * see GICv3/GICv4 Architecture Specification (IHI0069D): + * - section 4.8.1 Non-secure accesses to register fields for Secure interrupt + * priorities. + * - Figure 4-7 Secure read of the priority field for a Non-secure Group 1 + * interrupt. + */ +static DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis); + +#ifndef CONFIG_ARM_GIC_V3 +/* + * Global static key controlling whether an update to PMR allowing more + * interrupts requires to be propagated to the redistributor (DSB SY). + * And this needs to be exported for modules to be able to enable + * interrupts... + */ +DEFINE_STATIC_KEY_FALSE(gic_pmr_sync); +EXPORT_SYMBOL(gic_pmr_sync); + +DEFINE_STATIC_KEY_FALSE(gic_nonsecure_priorities); +EXPORT_SYMBOL(gic_nonsecure_priorities); +#else +extern struct static_key_false gic_pmr_sync; +extern struct static_key_false gic_nonsecure_priorities; +#endif + +/* ppi_nmi_refs[n] == number of cpus having ppi[n + 16] set as NMI */ +static refcount_t *ppi_nmi_refs; + +static struct gic_kvm_info gic_v3_kvm_info; +static DEFINE_PER_CPU(bool, has_rss); + +#define MPIDR_RS(mpidr) (((mpidr) & 0xF0UL) >> 4) +#define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist)) +#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) +#define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K) + +/* Our default, arbitrary priority value. Linux only uses one anyway. */ +#define DEFAULT_PMR_VALUE 0xf0 + +enum gic_intid_range { + SGI_RANGE, + PPI_RANGE, + SPI_RANGE, + EPPI_RANGE, + ESPI_RANGE, + LPI_RANGE, + __INVALID_RANGE__ +}; + +static enum gic_intid_range __get_intid_range(irq_hw_number_t hwirq) +{ + switch (hwirq) { + case 0 ... 15: + return SGI_RANGE; + case 16 ... 31: + return PPI_RANGE; + case 32 ... 1019: + return SPI_RANGE; + case EPPI_BASE_INTID ... (EPPI_BASE_INTID + 63): + return EPPI_RANGE; + case ESPI_BASE_INTID ... (ESPI_BASE_INTID + 1023): + return ESPI_RANGE; + case 8192 ... GENMASK(23, 0): + return LPI_RANGE; + default: + return __INVALID_RANGE__; + } +} + +static enum gic_intid_range get_intid_range(struct irq_data *d) +{ + return __get_intid_range(d->hwirq); +} + +static inline unsigned int gic_irq(struct irq_data *d) +{ + return d->hwirq; +} + +static inline bool gic_irq_in_rdist(struct irq_data *d) +{ + switch (get_intid_range(d)) { + case SGI_RANGE: + case PPI_RANGE: + case EPPI_RANGE: + return true; + default: + return false; + } +} + +static inline void __iomem *gic_dist_base(struct irq_data *d) +{ + switch (get_intid_range(d)) { + case SGI_RANGE: + case PPI_RANGE: + case EPPI_RANGE: + /* SGI+PPI -> SGI_base for this CPU */ + return gic_data_rdist_sgi_base(); + + case SPI_RANGE: + case ESPI_RANGE: + /* SPI -> dist_base */ + return gic_data.dist_base; + + default: + return NULL; + } +} + +static void gic_do_wait_for_rwp(void __iomem *base) +{ + u32 count = 1000000; /* 1s! */ + + while (readl_relaxed(base + GICD_CTLR) & GICD_CTLR_RWP) { + count--; + if (!count) { + pr_err_ratelimited("RWP timeout, gone fishing\n"); + return; + } + cpu_relax(); + udelay(1); + } +} + +/* Wait for completion of a distributor change */ +static void gic_dist_wait_for_rwp(void) +{ + gic_do_wait_for_rwp(gic_data.dist_base); +} + +/* Wait for completion of a redistributor change */ +static void gic_redist_wait_for_rwp(void) +{ + gic_do_wait_for_rwp(gic_data_rdist_rd_base()); +} + +#ifdef CONFIG_ARM64 + +static u64 __maybe_unused gic_read_iar(void) +{ + if (cpus_have_const_cap(ARM64_WORKAROUND_CAVIUM_23154)) + return gic_read_iar_cavium_thunderx(); + else + return gic_read_iar_common(); +} +#endif + +static void gic_enable_redist(bool enable) +{ + void __iomem *rbase; + u32 count = 1000000; /* 1s! */ + u32 val; + unsigned long mpidr; + int i; + + if (gic_data.flags & FLAGS_WORKAROUND_GICR_WAKER_MSM8996) + return; + + rbase = gic_data_rdist_rd_base(); + + val = readl_relaxed(rbase + GICR_WAKER); + if (enable) + /* Wake up this CPU redistributor */ + val &= ~GICR_WAKER_ProcessorSleep; + else + val |= GICR_WAKER_ProcessorSleep; + writel_relaxed(val, rbase + GICR_WAKER); + + if (!enable) { /* Check that GICR_WAKER is writeable */ + val = readl_relaxed(rbase + GICR_WAKER); + if (!(val & GICR_WAKER_ProcessorSleep)) + return; /* No PM support in this redistributor */ + } + + while (--count) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep)) + break; + cpu_relax(); + udelay(1); + } + if (!count) + pr_err_ratelimited("redistributor failed to %s...\n", + enable ? "wakeup" : "sleep"); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if(mpidr & 0xFFFF) // either Aff1 or Aff0 is not zero + return; + + rbase = rbase + 64*SZ_128K; // skip 64 Redistributors + + for(i = 0; i < 4; i++) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable) + /* Wake up this CPU redistributor */ + val &= ~GICR_WAKER_ProcessorSleep; + else + val |= GICR_WAKER_ProcessorSleep; + writel_relaxed(val, rbase + GICR_WAKER); + + if (!enable) { /* Check that GICR_WAKER is writeable */ + val = readl_relaxed(rbase + GICR_WAKER); + if (!(val & GICR_WAKER_ProcessorSleep)) + return; /* No PM support in this redistributor */ + } + + count = 1000000; /* 1s! */ + while (--count) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep)) + break; + cpu_relax(); + udelay(1); + }; + if (!count) + pr_err_ratelimited("CPU MPIDR 0x%lx: redistributor %d failed to %s...\n", mpidr, 64 + i, + enable ? "wakeup" : "sleep"); + + rbase = rbase + SZ_128K; // next redistributor + } + +} + +/* + * Routines to disable, enable, EOI and route interrupts + */ +static u32 convert_offset_index(struct irq_data *d, u32 offset, u32 *index) +{ + switch (get_intid_range(d)) { + case SGI_RANGE: + case PPI_RANGE: + case SPI_RANGE: + *index = d->hwirq; + return offset; + case EPPI_RANGE: + /* + * Contrary to the ESPI range, the EPPI range is contiguous + * to the PPI range in the registers, so let's adjust the + * displacement accordingly. Consistency is overrated. + */ + *index = d->hwirq - EPPI_BASE_INTID + 32; + return offset; + case ESPI_RANGE: + *index = d->hwirq - ESPI_BASE_INTID; + switch (offset) { + case GICD_ISENABLER: + return GICD_ISENABLERnE; + case GICD_ICENABLER: + return GICD_ICENABLERnE; + case GICD_ISPENDR: + return GICD_ISPENDRnE; + case GICD_ICPENDR: + return GICD_ICPENDRnE; + case GICD_ISACTIVER: + return GICD_ISACTIVERnE; + case GICD_ICACTIVER: + return GICD_ICACTIVERnE; + case GICD_IPRIORITYR: + return GICD_IPRIORITYRnE; + case GICD_ICFGR: + return GICD_ICFGRnE; + case GICD_IROUTER: + return GICD_IROUTERnE; + default: + break; + } + break; + default: + break; + } + + WARN_ON(1); + *index = d->hwirq; + return offset; +} + +static int gic_peek_irq(struct irq_data *d, u32 offset) +{ + void __iomem *base; + u32 index, mask; + + offset = convert_offset_index(d, offset, &index); + mask = 1 << (index % 32); + + if (gic_irq_in_rdist(d)) + base = gic_data_rdist_sgi_base(); + else { + unsigned int skt; + + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + } + + return !!(readl_relaxed(base + offset + (index / 32) * 4) & mask); +} + +static void gic_poke_irq(struct irq_data *d, u32 offset) +{ + void __iomem *base; + + unsigned long mpidr; + void __iomem *rbase; + int i; + unsigned int skt; + u32 index, mask; + + offset = convert_offset_index(d, offset, &index); + mask = 1 << (index % 32); + + if (gic_irq_in_rdist(d)) { + base = gic_data_rdist_sgi_base(); + + writel_relaxed(mask, base + offset + (index / 32) * 4); + gic_redist_wait_for_rwp(); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if((mpidr & 0xFFFF) == 0) { // both Aff1 and Aff0 are zero + rbase = base + 64*SZ_128K; // skip 64 Redistributors + + for(i = 0; i < 4; i++) { + writel_relaxed(mask, rbase + offset + (index / 32) * 4); + gic_do_wait_for_rwp(rbase - SZ_64K); // RD from SGI base + rbase = rbase + SZ_128K; + } + } // core 0 of each socket + } else { + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + writel_relaxed(mask, base + offset + (index / 32) * 4); + gic_do_wait_for_rwp(base); + } +} + +static void gic_mask_irq(struct irq_data *d) +{ + gic_poke_irq(d, GICD_ICENABLER); +} + +static void gic_eoimode1_mask_irq(struct irq_data *d) +{ + gic_mask_irq(d); + /* + * When masking a forwarded interrupt, make sure it is + * deactivated as well. + * + * This ensures that an interrupt that is getting + * disabled/masked will not get "stuck", because there is + * noone to deactivate it (guest is being terminated). + */ + if (irqd_is_forwarded_to_vcpu(d)) + gic_poke_irq(d, GICD_ICACTIVER); +} + +static void gic_unmask_irq(struct irq_data *d) +{ + gic_poke_irq(d, GICD_ISENABLER); +} + +static inline bool gic_supports_nmi(void) +{ + return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) && + static_branch_likely(&supports_pseudo_nmis); +} + +static int gic_irq_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, bool val) +{ + u32 reg; + + if (d->hwirq >= 8192) /* SGI/PPI/SPI only */ + return -EINVAL; + + switch (which) { + case IRQCHIP_STATE_PENDING: + reg = val ? GICD_ISPENDR : GICD_ICPENDR; + break; + + case IRQCHIP_STATE_ACTIVE: + reg = val ? GICD_ISACTIVER : GICD_ICACTIVER; + break; + + case IRQCHIP_STATE_MASKED: + reg = val ? GICD_ICENABLER : GICD_ISENABLER; + break; + + default: + return -EINVAL; + } + + gic_poke_irq(d, reg); + return 0; +} + +static int gic_irq_get_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, bool *val) +{ + if (d->hwirq >= 8192) /* PPI/SPI only */ + return -EINVAL; + + switch (which) { + case IRQCHIP_STATE_PENDING: + *val = gic_peek_irq(d, GICD_ISPENDR); + break; + + case IRQCHIP_STATE_ACTIVE: + *val = gic_peek_irq(d, GICD_ISACTIVER); + break; + + case IRQCHIP_STATE_MASKED: + *val = !gic_peek_irq(d, GICD_ISENABLER); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static void gic_irq_set_prio(struct irq_data *d, u8 prio) +{ + void __iomem *base = gic_dist_base(d); + u32 offset, index; + + offset = convert_offset_index(d, GICD_IPRIORITYR, &index); + + writeb_relaxed(prio, base + offset + index); +} + +static u32 gic_get_ppi_index(struct irq_data *d) +{ + switch (get_intid_range(d)) { + case PPI_RANGE: + return d->hwirq - 16; + case EPPI_RANGE: + return d->hwirq - EPPI_BASE_INTID + 16; + default: + unreachable(); + } +} + +static int gic_irq_nmi_setup(struct irq_data *d) +{ + struct irq_desc *desc = irq_to_desc(d->irq); + + if (!gic_supports_nmi()) + return -EINVAL; + + if (gic_peek_irq(d, GICD_ISENABLER)) { + pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq); + return -EINVAL; + } + + /* + * A secondary irq_chip should be in charge of LPI request, + * it should not be possible to get there + */ + if (WARN_ON(gic_irq(d) >= 8192)) + return -EINVAL; + + /* desc lock should already be held */ + if (gic_irq_in_rdist(d)) { + u32 idx = gic_get_ppi_index(d); + + /* Setting up PPI as NMI, only switch handler for first NMI */ + if (!refcount_inc_not_zero(&ppi_nmi_refs[idx])) { + refcount_set(&ppi_nmi_refs[idx], 1); + desc->handle_irq = handle_percpu_devid_fasteoi_nmi; + } + } else { + desc->handle_irq = handle_fasteoi_nmi; + } + + gic_irq_set_prio(d, GICD_INT_NMI_PRI); + + return 0; +} + +static void gic_irq_nmi_teardown(struct irq_data *d) +{ + struct irq_desc *desc = irq_to_desc(d->irq); + + if (WARN_ON(!gic_supports_nmi())) + return; + + if (gic_peek_irq(d, GICD_ISENABLER)) { + pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq); + return; + } + + /* + * A secondary irq_chip should be in charge of LPI request, + * it should not be possible to get there + */ + if (WARN_ON(gic_irq(d) >= 8192)) + return; + + /* desc lock should already be held */ + if (gic_irq_in_rdist(d)) { + u32 idx = gic_get_ppi_index(d); + + /* Tearing down NMI, only switch handler for last NMI */ + if (refcount_dec_and_test(&ppi_nmi_refs[idx])) + desc->handle_irq = handle_percpu_devid_irq; + } else { + desc->handle_irq = handle_fasteoi_irq; + } + + gic_irq_set_prio(d, GICD_INT_DEF_PRI); +} + +static void gic_eoi_irq(struct irq_data *d) +{ + gic_write_eoir(gic_irq(d)); +} + +static void gic_eoimode1_eoi_irq(struct irq_data *d) +{ + /* + * No need to deactivate an LPI, or an interrupt that + * is is getting forwarded to a vcpu. + */ + if (gic_irq(d) >= 8192 || irqd_is_forwarded_to_vcpu(d)) + return; + gic_write_dir(gic_irq(d)); +} + +static int gic_set_type(struct irq_data *d, unsigned int type) +{ + enum gic_intid_range range; + unsigned int irq = gic_irq(d); + void (*rwp_wait)(void); + void __iomem *base; + u32 offset, index; + int ret; + + unsigned long mpidr; + int i; + void __iomem *rbase; + unsigned int skt; + range = get_intid_range(d); + /* Interrupt configuration for SGIs can't be changed */ + if (range == SGI_RANGE) + return type != IRQ_TYPE_EDGE_RISING ? -EINVAL : 0; + + /* SPIs have restrictions on the supported types */ + if ((range == SPI_RANGE || range == ESPI_RANGE) && + type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING) + return -EINVAL; + + offset = convert_offset_index(d, GICD_ICFGR, &index); + + if (gic_irq_in_rdist(d)) { + base = gic_data_rdist_sgi_base(); + ret = gic_configure_irq(index, type, base + offset, gic_redist_wait_for_rwp); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if((mpidr & 0xFFFF) == 0) { // both Aff1 and Aff0 are zero + rbase = base + 64*SZ_128K; // skip 64 Redistributors + + for(i = 0; i < 4; i++) { + ret = gic_configure_irq(index, type, rbase + offset, NULL); + gic_do_wait_for_rwp(rbase - SZ_64K); + rbase = rbase + SZ_128K; + } + } + } else { + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + ret = gic_configure_irq(index, type, base + offset, NULL); + gic_do_wait_for_rwp(base); + } + + + if (ret && (range == PPI_RANGE || range == EPPI_RANGE)) { + /* Misconfigured PPIs are usually not fatal */ + pr_warn("GIC: PPI INTID%d is secure or misconfigured\n", irq); + ret = 0; + } + + return ret; +} + +static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu) +{ + if (get_intid_range(d) == SGI_RANGE) + return -EINVAL; + + if (vcpu) + irqd_set_forwarded_to_vcpu(d); + else + irqd_clr_forwarded_to_vcpu(d); + return 0; +} + +static u64 gic_mpidr_to_affinity(unsigned long mpidr) +{ + u64 aff; + + aff = ((u64)MPIDR_AFFINITY_LEVEL(mpidr, 3) << 32 | + MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 | + MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 | + MPIDR_AFFINITY_LEVEL(mpidr, 0)); + + return aff; +} + +static void gic_deactivate_unhandled(u32 irqnr) +{ + if (static_branch_likely(&supports_deactivate_key)) { + if (irqnr < 8192) + gic_write_dir(irqnr); + } else { + gic_write_eoir(irqnr); + } +} + +static inline void gic_handle_nmi(u32 irqnr, struct pt_regs *regs) +{ + bool irqs_enabled = interrupts_enabled(regs); + int err; + + if (irqs_enabled) + nmi_enter(); + + if (static_branch_likely(&supports_deactivate_key)) + gic_write_eoir(irqnr); + /* + * Leave the PSR.I bit set to prevent other NMIs to be + * received while handling this one. + * PSR.I will be restored when we ERET to the + * interrupted context. + */ + err = handle_domain_nmi(gic_data.domain, irqnr, regs); + if (err) + gic_deactivate_unhandled(irqnr); + + if (irqs_enabled) + nmi_exit(); +} + +static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs) +{ + u32 irqnr; + + irqnr = gic_read_iar(); + + if (gic_supports_nmi() && + unlikely(gic_read_rpr() == GICD_INT_NMI_PRI)) { + gic_handle_nmi(irqnr, regs); + return; + } + + if (gic_prio_masking_enabled()) { + gic_pmr_mask_irqs(); + gic_arch_enable_irqs(); + } + + /* Check for special IDs first */ + if ((irqnr >= 1020 && irqnr <= 1023)) + return; + + if (static_branch_likely(&supports_deactivate_key)) + gic_write_eoir(irqnr); + else + isb(); + + if (handle_domain_irq(gic_data.domain, irqnr, regs)) { + WARN_ONCE(true, "Unexpected interrupt received!\n"); + gic_deactivate_unhandled(irqnr); + } +} + +static u32 gic_get_pribits(void) +{ + u32 pribits; + + pribits = gic_read_ctlr(); + pribits &= ICC_CTLR_EL1_PRI_BITS_MASK; + pribits >>= ICC_CTLR_EL1_PRI_BITS_SHIFT; + pribits++; + + return pribits; +} + +static bool gic_has_group0(void) +{ + u32 val; + u32 old_pmr; + + old_pmr = gic_read_pmr(); + + /* + * Let's find out if Group0 is under control of EL3 or not by + * setting the highest possible, non-zero priority in PMR. + * + * If SCR_EL3.FIQ is set, the priority gets shifted down in + * order for the CPU interface to set bit 7, and keep the + * actual priority in the non-secure range. In the process, it + * looses the least significant bit and the actual priority + * becomes 0x80. Reading it back returns 0, indicating that + * we're don't have access to Group0. + */ + gic_write_pmr(BIT(8 - gic_get_pribits())); + val = gic_read_pmr(); + + gic_write_pmr(old_pmr); + + return val != 0; +} + +static void __init gic_dist_init(void) +{ + unsigned int i; + u64 affinity; + void __iomem *base = gic_data.dist_base; + u32 val; + + unsigned int skt; + + for(skt = 0; skt < MAX_MARS3_SOC_COUNT; skt++) { + + if((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + base = mars3_gic_dists[skt].dist_base; + + /* Disable the distributor */ + writel_relaxed(0, base + GICD_CTLR); + gic_do_wait_for_rwp(base); + + /* + * Configure SPIs as non-secure Group-1. This will only matter + * if the GIC only has a single security state. This will not + * do the right thing if the kernel is running in secure mode, + * but that's not the intended use case anyway. + */ + for (i = 32; i < GIC_LINE_NR; i += 32) + writel_relaxed(~0, base + GICD_IGROUPR + i / 8); + + /* Extended SPI range, not handled by the GICv2/GICv3 common code */ + for (i = 0; i < GIC_ESPI_NR; i += 32) { + writel_relaxed(~0U, base + GICD_ICENABLERnE + i / 8); + writel_relaxed(~0U, base + GICD_ICACTIVERnE + i / 8); + } + + for (i = 0; i < GIC_ESPI_NR; i += 32) + writel_relaxed(~0U, base + GICD_IGROUPRnE + i / 8); + + for (i = 0; i < GIC_ESPI_NR; i += 16) + writel_relaxed(0, base + GICD_ICFGRnE + i / 4); + + for (i = 0; i < GIC_ESPI_NR; i += 4) + writel_relaxed(GICD_INT_DEF_PRI_X4, base + GICD_IPRIORITYRnE + i); + + /* Now do the common stuff, and wait for the distributor to drain */ + gic_dist_config(base, GIC_LINE_NR, NULL); + gic_do_wait_for_rwp(base); // do sync outside of gic_dist_config + + val = GICD_CTLR_ARE_NS | GICD_CTLR_ENABLE_G1A | GICD_CTLR_ENABLE_G1; + if (gic_data.rdists.gicd_typer2 & GICD_TYPER2_nASSGIcap) { + pr_info("Enabling SGIs without active state\n"); + val |= GICD_CTLR_nASSGIreq; + } + + /* Enable distributor with ARE, Group1 */ + writel_relaxed(val, base + GICD_CTLR); + + /* + * Set all global interrupts to the boot CPU only. ARE must be + * enabled. + */ + affinity = gic_mpidr_to_affinity(cpu_logical_map(smp_processor_id())); + for (i = 32; i < GIC_LINE_NR; i++) + gic_write_irouter(affinity, base + GICD_IROUTER + i * 8); + + for (i = 0; i < GIC_ESPI_NR; i++) + gic_write_irouter(affinity, base + GICD_IROUTERnE + i * 8); + } +} + +static int gic_iterate_rdists(int (*fn)(struct redist_region *, void __iomem *)) +{ + int ret = -ENODEV; + int i; + + for (i = 0; i < gic_data.nr_redist_regions; i++) { + void __iomem *ptr = gic_data.redist_regions[i].redist_base; + u64 typer; + u32 reg; + + reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK; + if (reg != GIC_PIDR2_ARCH_GICv3 && + reg != GIC_PIDR2_ARCH_GICv4) { /* We're in trouble... */ + pr_warn("No redistributor present @%p\n", ptr); + break; + } + + do { + typer = gic_read_typer(ptr + GICR_TYPER); + ret = fn(gic_data.redist_regions + i, ptr); + if (!ret) + return 0; + + if (gic_data.redist_regions[i].single_redist) + break; + + if (gic_data.redist_stride) { + ptr += gic_data.redist_stride; + } else { + ptr += SZ_64K * 2; /* Skip RD_base + SGI_base */ + if (typer & GICR_TYPER_VLPIS) + ptr += SZ_64K * 2; /* Skip VLPI_base + reserved page */ + } + } while (!(typer & GICR_TYPER_LAST)); + } + + return ret ? -ENODEV : 0; +} + +static int __gic_populate_rdist(struct redist_region *region, void __iomem *ptr) +{ + unsigned long mpidr = cpu_logical_map(smp_processor_id()); + u64 typer; + u32 aff; + u32 aff2_skt; + u32 redist_skt; + + /* + * Convert affinity to a 32bit value that can be matched to + * GICR_TYPER bits [63:32]. + */ + aff = (MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 | + MPIDR_AFFINITY_LEVEL(mpidr, 0)); + + aff2_skt = MPIDR_AFFINITY_LEVEL(mpidr, 2) & 0x7; + redist_skt = (((u64)region->phys_base >> MARS3_ADDR_SKTID_SHIFT) & 0x7); + + if (aff2_skt != redist_skt) { + return 1; + } + + typer = gic_read_typer(ptr + GICR_TYPER); + if ((typer >> 32) == aff) { + u64 offset = ptr - region->redist_base; + raw_spin_lock_init(&gic_data_rdist()->rd_lock); + gic_data_rdist_rd_base() = ptr; + gic_data_rdist()->phys_base = region->phys_base + offset; + + pr_info("CPU%d: found redistributor %lx region %d:%pa\n", + smp_processor_id(), mpidr, + (int)(region - gic_data.redist_regions), + &gic_data_rdist()->phys_base); + return 0; + } + + /* Try next one */ + return 1; +} + +static int gic_populate_rdist(void) +{ + if (gic_iterate_rdists(__gic_populate_rdist) == 0) + return 0; + + /* We couldn't even deal with ourselves... */ + WARN(true, "CPU%d: mpidr %lx has no re-distributor!\n", + smp_processor_id(), + (unsigned long)cpu_logical_map(smp_processor_id())); + return -ENODEV; +} + +static int __gic_update_rdist_properties(struct redist_region *region, + void __iomem *ptr) +{ + u64 typer = gic_read_typer(ptr + GICR_TYPER); + + gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS); + + /* RVPEID implies some form of DirectLPI, no matter what the doc says... :-/ */ + gic_data.rdists.has_rvpeid &= !!(typer & GICR_TYPER_RVPEID); + gic_data.rdists.has_direct_lpi &= (!!(typer & GICR_TYPER_DirectLPIS) | + gic_data.rdists.has_rvpeid); + gic_data.rdists.has_vpend_valid_dirty &= !!(typer & GICR_TYPER_DIRTY); + + /* Detect non-sensical configurations */ + if (WARN_ON_ONCE(gic_data.rdists.has_rvpeid && !gic_data.rdists.has_vlpis)) { + gic_data.rdists.has_direct_lpi = false; + gic_data.rdists.has_vlpis = false; + gic_data.rdists.has_rvpeid = false; + } + + gic_data.ppi_nr = min(GICR_TYPER_NR_PPIS(typer), gic_data.ppi_nr); + + return 1; +} + +static void gic_update_rdist_properties(void) +{ + gic_data.ppi_nr = UINT_MAX; + gic_iterate_rdists(__gic_update_rdist_properties); + if (WARN_ON(gic_data.ppi_nr == UINT_MAX)) + gic_data.ppi_nr = 0; + pr_info("%d PPIs implemented\n", gic_data.ppi_nr); + if (gic_data.rdists.has_vlpis) + pr_info("GICv4 features: %s%s%s\n", + gic_data.rdists.has_direct_lpi ? "DirectLPI " : "", + gic_data.rdists.has_rvpeid ? "RVPEID " : "", + gic_data.rdists.has_vpend_valid_dirty ? "Valid+Dirty " : ""); +} + +/* Check whether it's single security state view */ +static inline bool gic_dist_security_disabled(void) +{ + return readl_relaxed(gic_data.dist_base + GICD_CTLR) & GICD_CTLR_DS; +} + +static void gic_cpu_sys_reg_init(void) +{ + int i, cpu = smp_processor_id(); + u64 mpidr = cpu_logical_map(cpu); + u64 need_rss = MPIDR_RS(mpidr); + bool group0; + u32 pribits; + + /* + * Need to check that the SRE bit has actually been set. If + * not, it means that SRE is disabled at EL2. We're going to + * die painfully, and there is nothing we can do about it. + * + * Kindly inform the luser. + */ + if (!gic_enable_sre()) + pr_err("GIC: unable to set SRE (disabled at EL2), panic ahead\n"); + + pribits = gic_get_pribits(); + + group0 = gic_has_group0(); + + /* Set priority mask register */ + if (!gic_prio_masking_enabled()) { + write_gicreg(DEFAULT_PMR_VALUE, ICC_PMR_EL1); + } else if (gic_supports_nmi()) { + /* + * Mismatch configuration with boot CPU, the system is likely + * to die as interrupt masking will not work properly on all + * CPUs + * + * The boot CPU calls this function before enabling NMI support, + * and as a result we'll never see this warning in the boot path + * for that CPU. + */ + if (static_branch_unlikely(&gic_nonsecure_priorities)) + WARN_ON(!group0 || gic_dist_security_disabled()); + else + WARN_ON(group0 && !gic_dist_security_disabled()); + } + + /* + * Some firmwares hand over to the kernel with the BPR changed from + * its reset value (and with a value large enough to prevent + * any pre-emptive interrupts from working at all). Writing a zero + * to BPR restores is reset value. + */ + gic_write_bpr1(0); + + if (static_branch_likely(&supports_deactivate_key)) { + /* EOI drops priority only (mode 1) */ + gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop); + } else { + /* EOI deactivates interrupt too (mode 0) */ + gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop_dir); + } + + /* Always whack Group0 before Group1 */ + if (group0) { + switch(pribits) { + case 8: + case 7: + write_gicreg(0, ICC_AP0R3_EL1); + write_gicreg(0, ICC_AP0R2_EL1); + fallthrough; + case 6: + write_gicreg(0, ICC_AP0R1_EL1); + fallthrough; + case 5: + case 4: + write_gicreg(0, ICC_AP0R0_EL1); + } + + isb(); + } + + switch(pribits) { + case 8: + case 7: + write_gicreg(0, ICC_AP1R3_EL1); + write_gicreg(0, ICC_AP1R2_EL1); + fallthrough; + case 6: + write_gicreg(0, ICC_AP1R1_EL1); + fallthrough; + case 5: + case 4: + write_gicreg(0, ICC_AP1R0_EL1); + } + + isb(); + + /* ... and let's hit the road... */ + gic_write_grpen1(1); + + /* Keep the RSS capability status in per_cpu variable */ + per_cpu(has_rss, cpu) = !!(gic_read_ctlr() & ICC_CTLR_EL1_RSS); + + /* Check all the CPUs have capable of sending SGIs to other CPUs */ + for_each_online_cpu(i) { + bool have_rss = per_cpu(has_rss, i) && per_cpu(has_rss, cpu); + + need_rss |= MPIDR_RS(cpu_logical_map(i)); + if (need_rss && (!have_rss)) + pr_crit("CPU%d (%lx) can't SGI CPU%d (%lx), no RSS\n", + cpu, (unsigned long)mpidr, + i, (unsigned long)cpu_logical_map(i)); + } + + /** + * GIC spec says, when ICC_CTLR_EL1.RSS==1 and GICD_TYPER.RSS==0, + * writing ICC_ASGI1R_EL1 register with RS != 0 is a CONSTRAINED + * UNPREDICTABLE choice of : + * - The write is ignored. + * - The RS field is treated as 0. + */ + if (need_rss && (!gic_data.has_rss)) + pr_crit_once("RSS is required but GICD doesn't support it\n"); +} + +static bool gicv3_nolpi; + +static int __init gicv3_nolpi_cfg(char *buf) +{ + return strtobool(buf, &gicv3_nolpi); +} +early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg); + +static int gic_dist_supports_lpis(void) +{ + return (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && + !!(readl_relaxed(gic_data.dist_base + GICD_TYPER) & GICD_TYPER_LPIS) && + !gicv3_nolpi); +} + +static void gic_cpu_init(void) +{ + void __iomem *rbase; + int i; + unsigned long mpidr; + + /* Register ourselves with the rest of the world */ + if (gic_populate_rdist()) + return; + + gic_enable_redist(true); + + WARN((gic_data.ppi_nr > 16 || GIC_ESPI_NR != 0) && + !(gic_read_ctlr() & ICC_CTLR_EL1_ExtRange), + "Distributor has extended ranges, but CPU%d doesn't\n", + smp_processor_id()); + + rbase = gic_data_rdist_sgi_base(); + + /* Configure SGIs/PPIs as non-secure Group-1 */ + for (i = 0; i < gic_data.ppi_nr + 16; i += 32) + writel_relaxed(~0, rbase + GICR_IGROUPR0 + i / 8); + + gic_cpu_config(rbase, gic_data.ppi_nr + 16, gic_redist_wait_for_rwp); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if((mpidr & 0xFFFF) == 0) { // both Aff1 and Aff0 is zero + rbase = rbase + 64*SZ_128K; // skip 64 Redistributors + + for(i = 0; i < 4; i++) { + /* Configure SGIs/PPIs as non-secure Group-1 */ + writel_relaxed(~0, rbase + GICR_IGROUPR0); + + gic_cpu_config(rbase, gic_data.ppi_nr + 16, NULL); + gic_do_wait_for_rwp(rbase - SZ_64K); + + rbase = rbase + SZ_128K; + + } + + } + + /* initialise system registers */ + gic_cpu_sys_reg_init(); +} + +#ifdef CONFIG_SMP + +#define MPIDR_TO_SGI_RS(mpidr) (MPIDR_RS(mpidr) << ICC_SGI1R_RS_SHIFT) +#define MPIDR_TO_SGI_CLUSTER_ID(mpidr) ((mpidr) & ~0xFUL) + +static int gic_starting_cpu(unsigned int cpu) +{ + gic_cpu_init(); + + if (gic_dist_supports_lpis()) + phytium_its_cpu_init(); + + return 0; +} + +static u16 gic_compute_target_list(int *base_cpu, const struct cpumask *mask, + unsigned long cluster_id) +{ + int next_cpu, cpu = *base_cpu; + unsigned long mpidr = cpu_logical_map(cpu); + u16 tlist = 0; + + while (cpu < nr_cpu_ids) { + tlist |= 1 << (mpidr & 0xf); + + next_cpu = cpumask_next(cpu, mask); + if (next_cpu >= nr_cpu_ids) + goto out; + cpu = next_cpu; + + mpidr = cpu_logical_map(cpu); + + if (cluster_id != MPIDR_TO_SGI_CLUSTER_ID(mpidr)) { + cpu--; + goto out; + } + } +out: + *base_cpu = cpu; + return tlist; +} + +#define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \ + (MPIDR_AFFINITY_LEVEL(cluster_id, level) \ + << ICC_SGI1R_AFFINITY_## level ##_SHIFT) + +static void gic_send_sgi(u64 cluster_id, u16 tlist, unsigned int irq) +{ + u64 val; + + val = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3) | + MPIDR_TO_SGI_AFFINITY(cluster_id, 2) | + irq << ICC_SGI1R_SGI_ID_SHIFT | + MPIDR_TO_SGI_AFFINITY(cluster_id, 1) | + MPIDR_TO_SGI_RS(cluster_id) | + tlist << ICC_SGI1R_TARGET_LIST_SHIFT); + + pr_devel("CPU%d: ICC_SGI1R_EL1 %llx\n", smp_processor_id(), val); + gic_write_sgi1r(val); +} + +static void gic_ipi_send_mask(struct irq_data *d, const struct cpumask *mask) +{ + int cpu; + + if (WARN_ON(d->hwirq >= 16)) + return; + + /* + * Ensure that stores to Normal memory are visible to the + * other CPUs before issuing the IPI. + */ + wmb(); + + for_each_cpu(cpu, mask) { + u64 cluster_id = MPIDR_TO_SGI_CLUSTER_ID(cpu_logical_map(cpu)); + u16 tlist; + + tlist = gic_compute_target_list(&cpu, mask, cluster_id); + gic_send_sgi(cluster_id, tlist, d->hwirq); + } + + /* Force the above writes to ICC_SGI1R_EL1 to be executed */ + isb(); +} + +static void __init gic_smp_init(void) +{ + struct irq_fwspec sgi_fwspec = { + .fwnode = gic_data.fwnode, + .param_count = 1, + }; + int base_sgi; + + cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING, + "irqchip/arm/gicv3:starting", + gic_starting_cpu, NULL); + + /* Register all 8 non-secure SGIs */ + base_sgi = __irq_domain_alloc_irqs(gic_data.domain, -1, 8, + NUMA_NO_NODE, &sgi_fwspec, + false, NULL); + if (WARN_ON(base_sgi <= 0)) + return; + + set_smp_ipi_range(base_sgi, 8); +} + +static int gic_cpumask_select(struct irq_data *d, const struct cpumask *mask_val) +{ + unsigned int skt, irq_skt, i; + unsigned int cpu, cpus = 0; + + unsigned int skt_cpu_cnt[MAX_MARS3_SOC_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SOC_COUNT)) { + skt_cpu_cnt[skt]++; + } else if (0xff != skt ) { + pr_err("socket address: %d is out of range.", skt); + } + } + + irq_skt = mars3_irq_to_skt(gic_irq(d)); + + if (0 != irq_skt) { + for (i = 0; i < irq_skt; i++) { + cpus += skt_cpu_cnt[i]; + } + } + + cpu = cpumask_any_and(mask_val, cpu_online_mask); + cpus = cpus + cpu % skt_cpu_cnt[irq_skt]; + + return cpus; +} + +static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, + bool force) +{ + unsigned int cpu; + u32 offset, index; + void __iomem *reg; + int enabled; + u64 val; + unsigned int skt; + + if (force) + cpu = cpumask_first(mask_val); + else + cpu = gic_cpumask_select(d, mask_val); + + if (cpu >= nr_cpu_ids) + return -EINVAL; + + if (gic_irq_in_rdist(d)) + return -EINVAL; + + /* If interrupt was enabled, disable it first */ + enabled = gic_peek_irq(d, GICD_ISENABLER); + if (enabled) + gic_mask_irq(d); + + offset = convert_offset_index(d, GICD_IROUTER, &index); + + skt = mars3_irq_to_skt(gic_irq(d)); + reg = mars3_gic_dists[skt].dist_base + offset + GICD_IROUTER + (index * 8); + val = gic_mpidr_to_affinity(cpu_logical_map(cpu)); + + gic_write_irouter(val, reg); + + /* + * If the interrupt was enabled, enabled it again. Otherwise, + * just wait for the distributor to have digested our changes. + */ + if (enabled) + gic_unmask_irq(d); + else + gic_dist_wait_for_rwp(); + + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + return IRQ_SET_MASK_OK_DONE; +} +#else +#define gic_set_affinity NULL +#define gic_ipi_send_mask NULL +#define gic_smp_init() do { } while(0) +#endif + +static int gic_retrigger(struct irq_data *data) +{ + return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true); +} + +#ifdef CONFIG_CPU_PM +static int gic_cpu_pm_notifier(struct notifier_block *self, + unsigned long cmd, void *v) +{ + if (cmd == CPU_PM_EXIT) { + if (gic_dist_security_disabled()) + gic_enable_redist(true); + gic_cpu_sys_reg_init(); + } else if (cmd == CPU_PM_ENTER && gic_dist_security_disabled()) { + gic_write_grpen1(0); + gic_enable_redist(false); + } + return NOTIFY_OK; +} + +static struct notifier_block gic_cpu_pm_notifier_block = { + .notifier_call = gic_cpu_pm_notifier, +}; + +static void gic_cpu_pm_init(void) +{ + cpu_pm_register_notifier(&gic_cpu_pm_notifier_block); +} + +#else +static inline void gic_cpu_pm_init(void) { } +#endif /* CONFIG_CPU_PM */ + +static struct irq_chip gic_chip = { + .name = "GIC-phytium-2500", + .irq_mask = gic_mask_irq, + .irq_unmask = gic_unmask_irq, + .irq_eoi = gic_eoi_irq, + .irq_set_type = gic_set_type, + .irq_set_affinity = gic_set_affinity, + .irq_retrigger = gic_retrigger, + .irq_get_irqchip_state = gic_irq_get_irqchip_state, + .irq_set_irqchip_state = gic_irq_set_irqchip_state, + .irq_nmi_setup = gic_irq_nmi_setup, + .irq_nmi_teardown = gic_irq_nmi_teardown, + .ipi_send_mask = gic_ipi_send_mask, + .flags = IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE | + IRQCHIP_MASK_ON_SUSPEND, +}; + +static struct irq_chip gic_eoimode1_chip = { + .name = "GICv3-phytium-2500", + .irq_mask = gic_eoimode1_mask_irq, + .irq_unmask = gic_unmask_irq, + .irq_eoi = gic_eoimode1_eoi_irq, + .irq_set_type = gic_set_type, + .irq_set_affinity = gic_set_affinity, + .irq_retrigger = gic_retrigger, + .irq_get_irqchip_state = gic_irq_get_irqchip_state, + .irq_set_irqchip_state = gic_irq_set_irqchip_state, + .irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity, + .irq_nmi_setup = gic_irq_nmi_setup, + .irq_nmi_teardown = gic_irq_nmi_teardown, + .ipi_send_mask = gic_ipi_send_mask, + .flags = IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE | + IRQCHIP_MASK_ON_SUSPEND, +}; + +static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + struct irq_chip *chip = &gic_chip; + struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq)); + + if (static_branch_likely(&supports_deactivate_key)) + chip = &gic_eoimode1_chip; + + switch (__get_intid_range(hw)) { + case SGI_RANGE: + irq_set_percpu_devid(irq); + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_percpu_devid_fasteoi_ipi, + NULL, NULL); + break; + + case PPI_RANGE: + case EPPI_RANGE: + irq_set_percpu_devid(irq); + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_percpu_devid_irq, NULL, NULL); + break; + + case SPI_RANGE: + case ESPI_RANGE: + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_fasteoi_irq, NULL, NULL); + irq_set_probe(irq); + irqd_set_single_target(irqd); + break; + + case LPI_RANGE: + if (!gic_dist_supports_lpis()) + return -EPERM; + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_fasteoi_irq, NULL, NULL); + break; + + default: + return -EPERM; + } + + /* Prevents SW retriggers which mess up the ACK/EOI ordering */ + irqd_set_handle_enforce_irqctx(irqd); + return 0; +} + +static int gic_irq_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + if (fwspec->param_count == 1 && fwspec->param[0] < 16) { + *hwirq = fwspec->param[0]; + *type = IRQ_TYPE_EDGE_RISING; + return 0; + } + + if (is_of_node(fwspec->fwnode)) { + if (fwspec->param_count < 3) + return -EINVAL; + + switch (fwspec->param[0]) { + case 0: /* SPI */ + *hwirq = fwspec->param[1] + 32; + break; + case 1: /* PPI */ + *hwirq = fwspec->param[1] + 16; + break; + case 2: /* ESPI */ + *hwirq = fwspec->param[1] + ESPI_BASE_INTID; + break; + case 3: /* EPPI */ + *hwirq = fwspec->param[1] + EPPI_BASE_INTID; + break; + case GIC_IRQ_TYPE_LPI: /* LPI */ + *hwirq = fwspec->param[1]; + break; + case GIC_IRQ_TYPE_PARTITION: + *hwirq = fwspec->param[1]; + if (fwspec->param[1] >= 16) + *hwirq += EPPI_BASE_INTID - 16; + else + *hwirq += 16; + break; + default: + return -EINVAL; + } + + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; + + /* + * Make it clear that broken DTs are... broken. + * Partitionned PPIs are an unfortunate exception. + */ + WARN_ON(*type == IRQ_TYPE_NONE && + fwspec->param[0] != GIC_IRQ_TYPE_PARTITION); + return 0; + } + + if (is_fwnode_irqchip(fwspec->fwnode)) { + if(fwspec->param_count != 2) + return -EINVAL; + + *hwirq = fwspec->param[0]; + *type = fwspec->param[1]; + + WARN_ON(*type == IRQ_TYPE_NONE); + return 0; + } + + return -EINVAL; +} + +static int gic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i, ret; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + struct irq_fwspec *fwspec = arg; + + ret = gic_irq_domain_translate(domain, fwspec, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) { + ret = gic_irq_domain_map(domain, virq + i, hwirq + i); + if (ret) + return ret; + } + + return 0; +} + +static void gic_irq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + int i; + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *d = irq_domain_get_irq_data(domain, virq + i); + irq_set_handler(virq + i, NULL); + irq_domain_reset_irq_data(d); + } +} + +static int gic_irq_domain_select(struct irq_domain *d, + struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token) +{ + /* Not for us */ + if (fwspec->fwnode != d->fwnode) + return 0; + + /* If this is not DT, then we have a single domain */ + if (!is_of_node(fwspec->fwnode)) + return 1; + + /* + * If this is a PPI and we have a 4th (non-null) parameter, + * then we need to match the partition domain. + */ + if (fwspec->param_count >= 4 && + fwspec->param[0] == 1 && fwspec->param[3] != 0 && + gic_data.ppi_descs) + return d == partition_get_domain(gic_data.ppi_descs[fwspec->param[1]]); + + return d == gic_data.domain; +} + +static const struct irq_domain_ops gic_irq_domain_ops = { + .translate = gic_irq_domain_translate, + .alloc = gic_irq_domain_alloc, + .free = gic_irq_domain_free, + .select = gic_irq_domain_select, +}; + +static int partition_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + struct device_node *np; + int ret; + + if (!gic_data.ppi_descs) + return -ENOMEM; + + np = of_find_node_by_phandle(fwspec->param[3]); + if (WARN_ON(!np)) + return -EINVAL; + + ret = partition_translate_id(gic_data.ppi_descs[fwspec->param[1]], + of_node_to_fwnode(np)); + if (ret < 0) + return ret; + + *hwirq = ret; + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static const struct irq_domain_ops partition_domain_ops = { + .translate = partition_domain_translate, + .select = gic_irq_domain_select, +}; + +static bool gic_enable_quirk_msm8996(void *data) +{ + struct gic_chip_data *d = data; + + d->flags |= FLAGS_WORKAROUND_GICR_WAKER_MSM8996; + + return true; +} + +static bool gic_enable_quirk_cavium_38539(void *data) +{ + struct gic_chip_data *d = data; + + d->flags |= FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539; + + return true; +} + +static bool gic_enable_quirk_hip06_07(void *data) +{ + struct gic_chip_data *d = data; + + /* + * HIP06 GICD_IIDR clashes with GIC-600 product number (despite + * not being an actual ARM implementation). The saving grace is + * that GIC-600 doesn't have ESPI, so nothing to do in that case. + * HIP07 doesn't even have a proper IIDR, and still pretends to + * have ESPI. In both cases, put them right. + */ + if (d->rdists.gicd_typer & GICD_TYPER_ESPI) { + /* Zero both ESPI and the RES0 field next to it... */ + d->rdists.gicd_typer &= ~GENMASK(9, 8); + return true; + } + + return false; +} + +static const struct gic_quirk gic_quirks[] = { + { + .desc = "GICv3: Qualcomm MSM8996 broken firmware", + .compatible = "qcom,msm8996-gic-v3", + .init = gic_enable_quirk_msm8996, + }, + { + .desc = "GICv3: HIP06 erratum 161010803", + .iidr = 0x0204043b, + .mask = 0xffffffff, + .init = gic_enable_quirk_hip06_07, + }, + { + .desc = "GICv3: HIP07 erratum 161010803", + .iidr = 0x00000000, + .mask = 0xffffffff, + .init = gic_enable_quirk_hip06_07, + }, + { + /* + * Reserved register accesses generate a Synchronous + * External Abort. This erratum applies to: + * - ThunderX: CN88xx + * - OCTEON TX: CN83xx, CN81xx + * - OCTEON TX2: CN93xx, CN96xx, CN98xx, CNF95xx* + */ + .desc = "GICv3: Cavium erratum 38539", + .iidr = 0xa000034c, + .mask = 0xe8f00fff, + .init = gic_enable_quirk_cavium_38539, + }, + { + } +}; + +static void gic_enable_nmi_support(void) +{ + int i; + + if (!gic_prio_masking_enabled()) + return; + + ppi_nmi_refs = kcalloc(gic_data.ppi_nr, sizeof(*ppi_nmi_refs), GFP_KERNEL); + if (!ppi_nmi_refs) + return; + + for (i = 0; i < gic_data.ppi_nr; i++) + refcount_set(&ppi_nmi_refs[i], 0); + + /* + * Linux itself doesn't use 1:N distribution, so has no need to + * set PMHE. The only reason to have it set is if EL3 requires it + * (and we can't change it). + */ + if (gic_read_ctlr() & ICC_CTLR_EL1_PMHE_MASK) + static_branch_enable(&gic_pmr_sync); + + pr_info("Pseudo-NMIs enabled using %s ICC_PMR_EL1 synchronisation\n", + static_branch_unlikely(&gic_pmr_sync) ? "forced" : "relaxed"); + + /* + * How priority values are used by the GIC depends on two things: + * the security state of the GIC (controlled by the GICD_CTRL.DS bit) + * and if Group 0 interrupts can be delivered to Linux in the non-secure + * world as FIQs (controlled by the SCR_EL3.FIQ bit). These affect the + * the ICC_PMR_EL1 register and the priority that software assigns to + * interrupts: + * + * GICD_CTRL.DS | SCR_EL3.FIQ | ICC_PMR_EL1 | Group 1 priority + * ----------------------------------------------------------- + * 1 | - | unchanged | unchanged + * ----------------------------------------------------------- + * 0 | 1 | non-secure | non-secure + * ----------------------------------------------------------- + * 0 | 0 | unchanged | non-secure + * + * where non-secure means that the value is right-shifted by one and the + * MSB bit set, to make it fit in the non-secure priority range. + * + * In the first two cases, where ICC_PMR_EL1 and the interrupt priority + * are both either modified or unchanged, we can use the same set of + * priorities. + * + * In the last case, where only the interrupt priorities are modified to + * be in the non-secure range, we use a different PMR value to mask IRQs + * and the rest of the values that we use remain unchanged. + */ + if (gic_has_group0() && !gic_dist_security_disabled()) + static_branch_enable(&gic_nonsecure_priorities); + + static_branch_enable(&supports_pseudo_nmis); + + if (static_branch_likely(&supports_deactivate_key)) + gic_eoimode1_chip.flags |= IRQCHIP_SUPPORTS_NMI; + else + gic_chip.flags |= IRQCHIP_SUPPORTS_NMI; +} + +static int __init gic_init_bases(void __iomem *dist_base, + struct redist_region *rdist_regs, + u32 nr_redist_regions, + u64 redist_stride, + struct fwnode_handle *handle) +{ + u32 typer; + int err; + + if (!is_hyp_mode_available()) + static_branch_disable(&supports_deactivate_key); + + if (static_branch_likely(&supports_deactivate_key)) + pr_info("GIC: Using split EOI/Deactivate mode\n"); + + gic_data.fwnode = handle; + gic_data.dist_base = dist_base; + gic_data.redist_regions = rdist_regs; + gic_data.nr_redist_regions = nr_redist_regions; + gic_data.redist_stride = redist_stride; + + /* + * Find out how many interrupts are supported. + */ + typer = readl_relaxed(gic_data.dist_base + GICD_TYPER); + gic_data.rdists.gicd_typer = typer; + + gic_enable_quirks(readl_relaxed(gic_data.dist_base + GICD_IIDR), + gic_quirks, &gic_data); + + pr_info("%d SPIs implemented\n", GIC_LINE_NR - 32); + pr_info("%d Extended SPIs implemented\n", GIC_ESPI_NR); + + /* + * ThunderX1 explodes on reading GICD_TYPER2, in violation of the + * architecture spec (which says that reserved registers are RES0). + */ + if (!(gic_data.flags & FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539)) + gic_data.rdists.gicd_typer2 = readl_relaxed(gic_data.dist_base + GICD_TYPER2); + + gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops, + &gic_data); + gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist)); + gic_data.rdists.has_rvpeid = true; + gic_data.rdists.has_vlpis = true; + gic_data.rdists.has_direct_lpi = true; + gic_data.rdists.has_vpend_valid_dirty = true; + + if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdists.rdist)) { + err = -ENOMEM; + goto out_free; + } + + irq_domain_update_bus_token(gic_data.domain, DOMAIN_BUS_WIRED); + + gic_data.has_rss = !!(typer & GICD_TYPER_RSS); + pr_info("Distributor has %sRange Selector support\n", + gic_data.has_rss ? "" : "no "); + + if (typer & GICD_TYPER_MBIS) { + err = mbi_init(handle, gic_data.domain); + if (err) + pr_err("Failed to initialize MBIs\n"); + } + + set_handle_irq(gic_handle_irq); + + gic_update_rdist_properties(); + + gic_dist_init(); + gic_cpu_init(); + gic_smp_init(); + gic_cpu_pm_init(); + + if (gic_dist_supports_lpis()) { + phytium_its_init(handle, &gic_data.rdists, gic_data.domain); + phytium_its_cpu_init(); + } else { + if (IS_ENABLED(CONFIG_ARM_GIC_V2M)) + gicv2m_init(handle, gic_data.domain); + } + + gic_enable_nmi_support(); + + return 0; + +out_free: + if (gic_data.domain) + irq_domain_remove(gic_data.domain); + free_percpu(gic_data.rdists.rdist); + return err; +} + +static int __init gic_validate_dist_version(void __iomem *dist_base) +{ + u32 reg = readl_relaxed(dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + + if (reg != GIC_PIDR2_ARCH_GICv3 && reg != GIC_PIDR2_ARCH_GICv4) + return -ENODEV; + + return 0; +} + +/* Create all possible partitions at boot time */ +static void __init gic_populate_ppi_partitions(struct device_node *gic_node) +{ + struct device_node *parts_node, *child_part; + int part_idx = 0, i; + int nr_parts; + struct partition_affinity *parts; + + parts_node = of_get_child_by_name(gic_node, "ppi-partitions"); + if (!parts_node) + return; + + gic_data.ppi_descs = kcalloc(gic_data.ppi_nr, sizeof(*gic_data.ppi_descs), GFP_KERNEL); + if (!gic_data.ppi_descs) + return; + + nr_parts = of_get_child_count(parts_node); + + if (!nr_parts) + goto out_put_node; + + parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL); + if (WARN_ON(!parts)) + goto out_put_node; + + for_each_child_of_node(parts_node, child_part) { + struct partition_affinity *part; + int n; + + part = &parts[part_idx]; + + part->partition_id = of_node_to_fwnode(child_part); + + pr_info("GIC: PPI partition %pOFn[%d] { ", + child_part, part_idx); + + n = of_property_count_elems_of_size(child_part, "affinity", + sizeof(u32)); + WARN_ON(n <= 0); + + for (i = 0; i < n; i++) { + int err, cpu; + u32 cpu_phandle; + struct device_node *cpu_node; + + err = of_property_read_u32_index(child_part, "affinity", + i, &cpu_phandle); + if (WARN_ON(err)) + continue; + + cpu_node = of_find_node_by_phandle(cpu_phandle); + if (WARN_ON(!cpu_node)) + continue; + + cpu = of_cpu_node_to_id(cpu_node); + if (WARN_ON(cpu < 0)) + continue; + + pr_cont("%pOF[%d] ", cpu_node, cpu); + + cpumask_set_cpu(cpu, &part->mask); + } + + pr_cont("}\n"); + part_idx++; + } + + for (i = 0; i < gic_data.ppi_nr; i++) { + unsigned int irq; + struct partition_desc *desc; + struct irq_fwspec ppi_fwspec = { + .fwnode = gic_data.fwnode, + .param_count = 3, + .param = { + [0] = GIC_IRQ_TYPE_PARTITION, + [1] = i, + [2] = IRQ_TYPE_NONE, + }, + }; + + irq = irq_create_fwspec_mapping(&ppi_fwspec); + if (WARN_ON(!irq)) + continue; + desc = partition_create_desc(gic_data.fwnode, parts, nr_parts, + irq, &partition_domain_ops); + if (WARN_ON(!desc)) + continue; + + gic_data.ppi_descs[i] = desc; + } + +out_put_node: + of_node_put(parts_node); +} + +static void __init gic_of_setup_kvm_info(struct device_node *node) +{ + int ret; + struct resource r; + u32 gicv_idx; + + gic_v3_kvm_info.type = GIC_V3; + + gic_v3_kvm_info.maint_irq = irq_of_parse_and_map(node, 0); + if (!gic_v3_kvm_info.maint_irq) + return; + + if (of_property_read_u32(node, "#redistributor-regions", + &gicv_idx)) + gicv_idx = 1; + + gicv_idx += 3; /* Also skip GICD, GICC, GICH */ + ret = of_address_to_resource(node, gicv_idx, &r); + if (!ret) + gic_v3_kvm_info.vcpu = r; + + gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis; + gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid; + gic_set_kvm_info(&gic_v3_kvm_info); +} + +static int __init gic_of_init(struct device_node *node, struct device_node *parent) +{ + void __iomem *dist_base; + struct redist_region *rdist_regs; + u64 redist_stride; + u32 nr_redist_regions; + int err, i; + struct resource res; + unsigned long skt; + + dist_base = of_iomap(node, 0); + if (!dist_base) { + pr_err("%pOF: unable to map gic dist registers\n", node); + return -ENXIO; + } + + err = gic_validate_dist_version(dist_base); + if (err) { + pr_err("%pOF: no distributor detected, giving up\n", node); + goto out_unmap_dist; + } + + if (of_address_to_resource(node, 0, &res)) { + printk("Error: No GIC Distributor in FDT\n"); + goto out_unmap_dist; + } + + mars3_gic_dists[0].phys_base = res.start; + mars3_gic_dists[0].size = resource_size(&res); + mars3_gic_dists[0].dist_base = dist_base; + + if (of_property_read_u32(node, "#mars3_soc_bitmap", &mars3_sockets_bitmap)) + mars3_sockets_bitmap = 0x1; + + + for(skt = 1; skt < MAX_MARS3_SOC_COUNT; skt++) { + if((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + mars3_gic_dists[skt].phys_base = ((unsigned long)skt << MARS3_ADDR_SKTID_SHIFT) | mars3_gic_dists[0].phys_base; + mars3_gic_dists[skt].size = mars3_gic_dists[0].size; + mars3_gic_dists[skt].dist_base = ioremap(mars3_gic_dists[skt].phys_base, mars3_gic_dists[skt].size); + + } + + if (of_property_read_u32(node, "#redistributor-regions", &nr_redist_regions)) + nr_redist_regions = 1; + + rdist_regs = kcalloc(nr_redist_regions, sizeof(*rdist_regs), + GFP_KERNEL); + if (!rdist_regs) { + err = -ENOMEM; + goto out_unmap_dist; + } + + for (i = 0; i < nr_redist_regions; i++) { + struct resource res; + int ret; + + ret = of_address_to_resource(node, 1 + i, &res); + rdist_regs[i].redist_base = of_iomap(node, 1 + i); + if (ret || !rdist_regs[i].redist_base) { + pr_err("%pOF: couldn't map region %d\n", node, i); + err = -ENODEV; + goto out_unmap_rdist; + } + rdist_regs[i].phys_base = res.start; + } + + if (of_property_read_u64(node, "redistributor-stride", &redist_stride)) + redist_stride = 0; + + gic_enable_of_quirks(node, gic_quirks, &gic_data); + + err = gic_init_bases(dist_base, rdist_regs, nr_redist_regions, + redist_stride, &node->fwnode); + if (err) + goto out_unmap_rdist; + + gic_populate_ppi_partitions(node); + + if (static_branch_likely(&supports_deactivate_key)) + gic_of_setup_kvm_info(node); + return 0; + +out_unmap_rdist: + for (i = 0; i < nr_redist_regions; i++) + if (rdist_regs[i].redist_base) + iounmap(rdist_regs[i].redist_base); + kfree(rdist_regs); +out_unmap_dist: + iounmap(dist_base); + return err; +} + +IRQCHIP_DECLARE(gic_phyt_2500, "arm,gic-phytium-2500", gic_of_init); + +#ifdef CONFIG_ACPI +static struct +{ + void __iomem *dist_base; + struct redist_region *redist_regs; + u32 nr_redist_regions; + bool single_redist; + int enabled_rdists; + u32 maint_irq; + int maint_irq_mode; + phys_addr_t vcpu_base; +} acpi_data __initdata; + +static int gic_mars3_sockets_bitmap(void) +{ + unsigned int skt, i; + int skt_bitmap = 0; + + unsigned int skt_cpu_cnt[MAX_MARS3_SOC_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SOC_COUNT)) { + skt_cpu_cnt[skt]++; + } else if (0xff != skt ) { + pr_err("socket address: %d is out of range.", skt); + } + } + + for (i = 0; i < MAX_MARS3_SOC_COUNT; i++) { + if (skt_cpu_cnt[i] > 0) + skt_bitmap |= (1 << i); + } + + return skt_bitmap; +} + +static void __init +gic_acpi_register_redist(phys_addr_t phys_base, void __iomem *redist_base) +{ + static int count = 0; + + acpi_data.redist_regs[count].phys_base = phys_base; + acpi_data.redist_regs[count].redist_base = redist_base; + acpi_data.redist_regs[count].single_redist = acpi_data.single_redist; + count++; +} + +static int __init +gic_acpi_parse_madt_redist(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_generic_redistributor *redist = + (struct acpi_madt_generic_redistributor *)header; + void __iomem *redist_base; + + redist_base = ioremap(redist->base_address, redist->length); + if (!redist_base) { + pr_err("Couldn't map GICR region @%llx\n", redist->base_address); + return -ENOMEM; + } + + gic_acpi_register_redist(redist->base_address, redist_base); + return 0; +} + +static int __init +gic_acpi_parse_madt_gicc(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + u32 reg = readl_relaxed(acpi_data.dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; + void __iomem *redist_base; + + /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + redist_base = ioremap(gicc->gicr_base_address, size); + if (!redist_base) + return -ENOMEM; + + gic_acpi_register_redist(gicc->gicr_base_address, redist_base); + return 0; +} + +static int __init gic_acpi_collect_gicr_base(void) +{ + acpi_tbl_entry_handler redist_parser; + enum acpi_madt_type type; + + if (acpi_data.single_redist) { + type = ACPI_MADT_TYPE_GENERIC_INTERRUPT; + redist_parser = gic_acpi_parse_madt_gicc; + } else { + type = ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR; + redist_parser = gic_acpi_parse_madt_redist; + } + + /* Collect redistributor base addresses in GICR entries */ + if (acpi_table_parse_madt(type, redist_parser, 0) > 0) + return 0; + + pr_info("No valid GICR entries exist\n"); + return -ENODEV; +} + +static int __init gic_acpi_match_gicr(union acpi_subtable_headers *header, + const unsigned long end) +{ + /* Subtable presence means that redist exists, that's it */ + return 0; +} + +static int __init gic_acpi_match_gicc(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + + /* + * If GICC is enabled and has valid gicr base address, then it means + * GICR base is presented via GICC + */ + if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) { + acpi_data.enabled_rdists++; + return 0; + } + + /* + * It's perfectly valid firmware can pass disabled GICC entry, driver + * should not treat as errors, skip the entry instead of probe fail. + */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + return -ENODEV; +} + +static int __init gic_acpi_count_gicr_regions(void) +{ + int count; + + /* + * Count how many redistributor regions we have. It is not allowed + * to mix redistributor description, GICR and GICC subtables have to be + * mutually exclusive. + */ + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR, + gic_acpi_match_gicr, 0); + if (count > 0) { + acpi_data.single_redist = false; + return count; + } + + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, + gic_acpi_match_gicc, 0); + if (count > 0) { + acpi_data.single_redist = true; + count = acpi_data.enabled_rdists; + } + + return count; +} + +static bool __init acpi_validate_gic_table(struct acpi_subtable_header *header, + struct acpi_probe_entry *ape) +{ + struct acpi_madt_generic_distributor *dist; + int count; + + dist = (struct acpi_madt_generic_distributor *)header; + if (dist->version != ape->driver_data) + return false; + + /* We need to do that exercise anyway, the sooner the better */ + count = gic_acpi_count_gicr_regions(); + if (count <= 0) + return false; + + acpi_data.nr_redist_regions = count; + return true; +} + +static int __init gic_acpi_parse_virt_madt_gicc(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + int maint_irq_mode; + static int first_madt = true; + + /* Skip unusable CPUs */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ? + ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE; + + if (first_madt) { + first_madt = false; + + acpi_data.maint_irq = gicc->vgic_interrupt; + acpi_data.maint_irq_mode = maint_irq_mode; + acpi_data.vcpu_base = gicc->gicv_base_address; + + return 0; + } + + /* + * The maintenance interrupt and GICV should be the same for every CPU + */ + if ((acpi_data.maint_irq != gicc->vgic_interrupt) || + (acpi_data.maint_irq_mode != maint_irq_mode) || + (acpi_data.vcpu_base != gicc->gicv_base_address)) + return -EINVAL; + + return 0; +} + +static bool __init gic_acpi_collect_virt_info(void) +{ + int count; + + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, + gic_acpi_parse_virt_madt_gicc, 0); + + return (count > 0); +} + +#define ACPI_GICV3_DIST_MEM_SIZE (SZ_64K) +#define ACPI_GICV2_VCTRL_MEM_SIZE (SZ_4K) +#define ACPI_GICV2_VCPU_MEM_SIZE (SZ_8K) + +static void __init gic_acpi_setup_kvm_info(void) +{ + int irq; + + if (!gic_acpi_collect_virt_info()) { + pr_warn("Unable to get hardware information used for virtualization\n"); + return; + } + + gic_v3_kvm_info.type = GIC_V3; + + irq = acpi_register_gsi(NULL, acpi_data.maint_irq, + acpi_data.maint_irq_mode, + ACPI_ACTIVE_HIGH); + if (irq <= 0) + return; + + gic_v3_kvm_info.maint_irq = irq; + + if (acpi_data.vcpu_base) { + struct resource *vcpu = &gic_v3_kvm_info.vcpu; + + vcpu->flags = IORESOURCE_MEM; + vcpu->start = acpi_data.vcpu_base; + vcpu->end = vcpu->start + ACPI_GICV2_VCPU_MEM_SIZE - 1; + } + + gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis; + gic_v3_kvm_info.has_v4_1 = gic_data.rdists.has_rvpeid; + gic_set_kvm_info(&gic_v3_kvm_info); +} + +static int __init +gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end) +{ + struct acpi_madt_generic_distributor *dist; + struct fwnode_handle *domain_handle; + size_t size; + int i, err; + int skt; + + /* Get distributor base address */ + dist = (struct acpi_madt_generic_distributor *)header; + acpi_data.dist_base = ioremap(dist->base_address, + ACPI_GICV3_DIST_MEM_SIZE); + if (!acpi_data.dist_base) { + pr_err("Unable to map GICD registers\n"); + return -ENOMEM; + } + + err = gic_validate_dist_version(acpi_data.dist_base); + if (err) { + pr_err("No distributor detected at @%p, giving up\n", + acpi_data.dist_base); + goto out_dist_unmap; + } + + mars3_gic_dists[0].phys_base = dist->base_address; + mars3_gic_dists[0].size = ACPI_GICV3_DIST_MEM_SIZE; + mars3_gic_dists[0].dist_base = acpi_data.dist_base; + +#ifdef CONFIG_ACPI + mars3_sockets_bitmap = gic_mars3_sockets_bitmap(); + if (mars3_sockets_bitmap == 0){ + mars3_sockets_bitmap = 0x1; + pr_err("No socket, please check cpus MPIDR_AFFINITY_LEVEL!!!"); + } + else + printk("mars3_sockets_bitmap = 0x%x\n", mars3_sockets_bitmap); +#endif + + for(skt = 1; skt < MAX_MARS3_SOC_COUNT; skt++) { + if((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + mars3_gic_dists[skt].phys_base = ((unsigned long)skt << MARS3_ADDR_SKTID_SHIFT) | mars3_gic_dists[0].phys_base; + mars3_gic_dists[skt].size = mars3_gic_dists[0].size; + mars3_gic_dists[skt].dist_base = ioremap(mars3_gic_dists[skt].phys_base, mars3_gic_dists[skt].size); + + } + + size = sizeof(*acpi_data.redist_regs) * acpi_data.nr_redist_regions; + acpi_data.redist_regs = kzalloc(size, GFP_KERNEL); + if (!acpi_data.redist_regs) { + err = -ENOMEM; + goto out_dist_unmap; + } + + err = gic_acpi_collect_gicr_base(); + if (err) + goto out_redist_unmap; + + domain_handle = irq_domain_alloc_fwnode(&dist->base_address); + if (!domain_handle) { + err = -ENOMEM; + goto out_redist_unmap; + } + + err = gic_init_bases(acpi_data.dist_base, acpi_data.redist_regs, + acpi_data.nr_redist_regions, 0, domain_handle); + if (err) + goto out_fwhandle_free; + + acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, domain_handle); + + if (static_branch_likely(&supports_deactivate_key)) + gic_acpi_setup_kvm_info(); + + return 0; + +out_fwhandle_free: + irq_domain_free_fwnode(domain_handle); +out_redist_unmap: + for (i = 0; i < acpi_data.nr_redist_regions; i++) + if (acpi_data.redist_regs[i].redist_base) + iounmap(acpi_data.redist_regs[i].redist_base); + kfree(acpi_data.redist_regs); +out_dist_unmap: + iounmap(acpi_data.dist_base); + return err; +} +IRQCHIP_ACPI_DECLARE(gic_phyt_2500, ACPI_MADT_TYPE_PHYTIUM_2500, + acpi_validate_gic_table, ACPI_MADT_GIC_VERSION_V3, + gic_acpi_init); +#endif diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h index ec66779..fe3eb98 100644 --- a/include/acpi/actbl2.h +++ b/include/acpi/actbl2.h @@ -517,7 +517,8 @@ enum acpi_madt_type { ACPI_MADT_TYPE_GENERIC_MSI_FRAME = 13, ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR = 14, ACPI_MADT_TYPE_GENERIC_TRANSLATOR = 15, - ACPI_MADT_TYPE_RESERVED = 16 /* 16 and greater are reserved */ + ACPI_MADT_TYPE_RESERVED = 16, /* 16 and greater are reserved */ + ACPI_MADT_TYPE_PHYTIUM_2500 = 128 }; /* diff --git a/include/linux/irqchip/arm-gic-phytium-2500.h b/include/linux/irqchip/arm-gic-phytium-2500.h new file mode 100644 index 0000000..96c5ca8 --- /dev/null +++ b/include/linux/irqchip/arm-gic-phytium-2500.h @@ -0,0 +1,725 @@ +/* + * Copyright (C) 2020 Phytium Corporation. + * Author: Wang Yinfeng &lt;wangyinfeng(a)phytium.com.cn&gt; + * Chen Baozi &lt;chenbaozi(a)phytium.com.cn&gt; + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __LINUX_IRQCHIP_ARM_GIC_PHYTIUM_2500_H +#define __LINUX_IRQCHIP_ARM_GIC_PHYTIUM_2500_H + +/* + * Distributor registers. We assume we're running non-secure, with ARE + * being set. Secure-only and non-ARE registers are not described. + */ +#define GICD_CTLR 0x0000 +#define GICD_TYPER 0x0004 +#define GICD_IIDR 0x0008 +#define GICD_TYPER2 0x000C +#define GICD_STATUSR 0x0010 +#define GICD_SETSPI_NSR 0x0040 +#define GICD_CLRSPI_NSR 0x0048 +#define GICD_SETSPI_SR 0x0050 +#define GICD_CLRSPI_SR 0x0058 +#define GICD_IGROUPR 0x0080 +#define GICD_ISENABLER 0x0100 +#define GICD_ICENABLER 0x0180 +#define GICD_ISPENDR 0x0200 +#define GICD_ICPENDR 0x0280 +#define GICD_ISACTIVER 0x0300 +#define GICD_ICACTIVER 0x0380 +#define GICD_IPRIORITYR 0x0400 +#define GICD_ICFGR 0x0C00 +#define GICD_IGRPMODR 0x0D00 +#define GICD_NSACR 0x0E00 +#define GICD_IGROUPRnE 0x1000 +#define GICD_ISENABLERnE 0x1200 +#define GICD_ICENABLERnE 0x1400 +#define GICD_ISPENDRnE 0x1600 +#define GICD_ICPENDRnE 0x1800 +#define GICD_ISACTIVERnE 0x1A00 +#define GICD_ICACTIVERnE 0x1C00 +#define GICD_IPRIORITYRnE 0x2000 +#define GICD_ICFGRnE 0x3000 +#define GICD_IROUTER 0x6000 +#define GICD_IROUTERnE 0x8000 +#define GICD_IDREGS 0xFFD0 +#define GICD_PIDR2 0xFFE8 + +#define ESPI_BASE_INTID 4096 + +/* + * Those registers are actually from GICv2, but the spec demands that they + * are implemented as RES0 if ARE is 1 (which we do in KVM's emulated GICv3). + */ +#define GICD_ITARGETSR 0x0800 +#define GICD_SGIR 0x0F00 +#define GICD_CPENDSGIR 0x0F10 +#define GICD_SPENDSGIR 0x0F20 + +#define GICD_CTLR_RWP (1U << 31) +#define GICD_CTLR_nASSGIreq (1U << 8) +#define GICD_CTLR_DS (1U << 6) +#define GICD_CTLR_ARE_NS (1U << 4) +#define GICD_CTLR_ENABLE_G1A (1U << 1) +#define GICD_CTLR_ENABLE_G1 (1U << 0) + +#define GICD_IIDR_IMPLEMENTER_SHIFT 0 +#define GICD_IIDR_IMPLEMENTER_MASK (0xfff << GICD_IIDR_IMPLEMENTER_SHIFT) +#define GICD_IIDR_REVISION_SHIFT 12 +#define GICD_IIDR_REVISION_MASK (0xf << GICD_IIDR_REVISION_SHIFT) +#define GICD_IIDR_VARIANT_SHIFT 16 +#define GICD_IIDR_VARIANT_MASK (0xf << GICD_IIDR_VARIANT_SHIFT) +#define GICD_IIDR_PRODUCT_ID_SHIFT 24 +#define GICD_IIDR_PRODUCT_ID_MASK (0xff << GICD_IIDR_PRODUCT_ID_SHIFT) + + +/* + * In systems with a single security state (what we emulate in KVM) + * the meaning of the interrupt group enable bits is slightly different + */ +#define GICD_CTLR_ENABLE_SS_G1 (1U << 1) +#define GICD_CTLR_ENABLE_SS_G0 (1U << 0) + +#define GICD_TYPER_RSS (1U << 26) +#define GICD_TYPER_LPIS (1U << 17) +#define GICD_TYPER_MBIS (1U << 16) +#define GICD_TYPER_ESPI (1U << 8) + +#define GICD_TYPER_ID_BITS(typer) ((((typer) >> 19) & 0x1f) + 1) +#define GICD_TYPER_NUM_LPIS(typer) ((((typer) >> 11) & 0x1f) + 1) +#define GICD_TYPER_SPIS(typer) ((((typer) & 0x1f) + 1) * 32) +#define GICD_TYPER_ESPIS(typer) \ + (((typer) & GICD_TYPER_ESPI) ? GICD_TYPER_SPIS((typer) >> 27) : 0) + +#define GICD_TYPER2_nASSGIcap (1U << 8) +#define GICD_TYPER2_VIL (1U << 7) +#define GICD_TYPER2_VID GENMASK(4, 0) + +#define GICD_IROUTER_SPI_MODE_ONE (0U << 31) +#define GICD_IROUTER_SPI_MODE_ANY (1U << 31) + +#define GIC_PIDR2_ARCH_MASK 0xf0 +#define GIC_PIDR2_ARCH_GICv3 0x30 +#define GIC_PIDR2_ARCH_GICv4 0x40 + +#define GIC_V3_DIST_SIZE 0x10000 + +#define GIC_PAGE_SIZE_4K 0ULL +#define GIC_PAGE_SIZE_16K 1ULL +#define GIC_PAGE_SIZE_64K 2ULL +#define GIC_PAGE_SIZE_MASK 3ULL + +/* + * Re-Distributor registers, offsets from RD_base + */ +#define GICR_CTLR GICD_CTLR +#define GICR_IIDR 0x0004 +#define GICR_TYPER 0x0008 +#define GICR_STATUSR GICD_STATUSR +#define GICR_WAKER 0x0014 +#define GICR_SETLPIR 0x0040 +#define GICR_CLRLPIR 0x0048 +#define GICR_PROPBASER 0x0070 +#define GICR_PENDBASER 0x0078 +#define GICR_INVLPIR 0x00A0 +#define GICR_INVALLR 0x00B0 +#define GICR_SYNCR 0x00C0 +#define GICR_IDREGS GICD_IDREGS +#define GICR_PIDR2 GICD_PIDR2 + +#define GICR_CTLR_ENABLE_LPIS (1UL << 0) +#define GICR_CTLR_RWP (1UL << 3) + +#define GICR_TYPER_CPU_NUMBER(r) (((r) >> 8) & 0xffff) + +#define EPPI_BASE_INTID 1056 + +#define GICR_TYPER_NR_PPIS(r) \ + ({ \ + unsigned int __ppinum = ((r) >> 27) & 0x1f; \ + unsigned int __nr_ppis = 16; \ + if (__ppinum == 1 || __ppinum == 2) \ + __nr_ppis += __ppinum * 32; \ + \ + __nr_ppis; \ + }) + +#define GICR_WAKER_ProcessorSleep (1U << 1) +#define GICR_WAKER_ChildrenAsleep (1U << 2) + +#define GIC_BASER_CACHE_nCnB 0ULL +#define GIC_BASER_CACHE_SameAsInner 0ULL +#define GIC_BASER_CACHE_nC 1ULL +#define GIC_BASER_CACHE_RaWt 2ULL +#define GIC_BASER_CACHE_RaWb 3ULL +#define GIC_BASER_CACHE_WaWt 4ULL +#define GIC_BASER_CACHE_WaWb 5ULL +#define GIC_BASER_CACHE_RaWaWt 6ULL +#define GIC_BASER_CACHE_RaWaWb 7ULL +#define GIC_BASER_CACHE_MASK 7ULL +#define GIC_BASER_NonShareable 0ULL +#define GIC_BASER_InnerShareable 1ULL +#define GIC_BASER_OuterShareable 2ULL +#define GIC_BASER_SHAREABILITY_MASK 3ULL + +#define GIC_BASER_CACHEABILITY(reg, inner_outer, type) \ + (GIC_BASER_CACHE_##type << reg##_##inner_outer##_CACHEABILITY_SHIFT) + +#define GIC_BASER_SHAREABILITY(reg, type) \ + (GIC_BASER_##type << reg##_SHAREABILITY_SHIFT) + +/* encode a size field of width @w containing @n - 1 units */ +#define GIC_ENCODE_SZ(n, w) (((unsigned long)(n) - 1) & GENMASK_ULL(((w) - 1), 0)) + +#define GICR_PROPBASER_SHAREABILITY_SHIFT (10) +#define GICR_PROPBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_PROPBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_PROPBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_PROPBASER, SHAREABILITY_MASK) +#define GICR_PROPBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, MASK) +#define GICR_PROPBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PROPBASER, OUTER, MASK) +#define GICR_PROPBASER_CACHEABILITY_MASK GICR_PROPBASER_INNER_CACHEABILITY_MASK + +#define GICR_PROPBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_PROPBASER, InnerShareable) + +#define GICR_PROPBASER_nCnB GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, nCnB) +#define GICR_PROPBASER_nC GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, nC) +#define GICR_PROPBASER_RaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWt) +#define GICR_PROPBASER_RaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWb) +#define GICR_PROPBASER_WaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, WaWt) +#define GICR_PROPBASER_WaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, WaWb) +#define GICR_PROPBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWaWt) +#define GICR_PROPBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWaWb) + +#define GICR_PROPBASER_IDBITS_MASK (0x1f) +#define GICR_PROPBASER_ADDRESS(x) ((x) & GENMASK_ULL(51, 12)) +#define GICR_PENDBASER_ADDRESS(x) ((x) & GENMASK_ULL(51, 16)) + +#define GICR_PENDBASER_SHAREABILITY_SHIFT (10) +#define GICR_PENDBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_PENDBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_PENDBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_PENDBASER, SHAREABILITY_MASK) +#define GICR_PENDBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, MASK) +#define GICR_PENDBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PENDBASER, OUTER, MASK) +#define GICR_PENDBASER_CACHEABILITY_MASK GICR_PENDBASER_INNER_CACHEABILITY_MASK + +#define GICR_PENDBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_PENDBASER, InnerShareable) + +#define GICR_PENDBASER_nCnB GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, nCnB) +#define GICR_PENDBASER_nC GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, nC) +#define GICR_PENDBASER_RaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWt) +#define GICR_PENDBASER_RaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWb) +#define GICR_PENDBASER_WaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, WaWt) +#define GICR_PENDBASER_WaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, WaWb) +#define GICR_PENDBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWaWt) +#define GICR_PENDBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWaWb) + +#define GICR_PENDBASER_PTZ BIT_ULL(62) + +/* + * Re-Distributor registers, offsets from SGI_base + */ +#define GICR_IGROUPR0 GICD_IGROUPR +#define GICR_ISENABLER0 GICD_ISENABLER +#define GICR_ICENABLER0 GICD_ICENABLER +#define GICR_ISPENDR0 GICD_ISPENDR +#define GICR_ICPENDR0 GICD_ICPENDR +#define GICR_ISACTIVER0 GICD_ISACTIVER +#define GICR_ICACTIVER0 GICD_ICACTIVER +#define GICR_IPRIORITYR0 GICD_IPRIORITYR +#define GICR_ICFGR0 GICD_ICFGR +#define GICR_IGRPMODR0 GICD_IGRPMODR +#define GICR_NSACR GICD_NSACR + +#define GICR_TYPER_PLPIS (1U << 0) +#define GICR_TYPER_VLPIS (1U << 1) +#define GICR_TYPER_DIRTY (1U << 2) +#define GICR_TYPER_DirectLPIS (1U << 3) +#define GICR_TYPER_LAST (1U << 4) +#define GICR_TYPER_RVPEID (1U << 7) +#define GICR_TYPER_COMMON_LPI_AFF GENMASK_ULL(25, 24) +#define GICR_TYPER_AFFINITY GENMASK_ULL(63, 32) + +#define GICR_INVLPIR_INTID GENMASK_ULL(31, 0) +#define GICR_INVLPIR_VPEID GENMASK_ULL(47, 32) +#define GICR_INVLPIR_V GENMASK_ULL(63, 63) + +#define GICR_INVALLR_VPEID GICR_INVLPIR_VPEID +#define GICR_INVALLR_V GICR_INVLPIR_V + +#define GIC_V3_REDIST_SIZE 0x20000 + +#define LPI_PROP_GROUP1 (1 << 1) +#define LPI_PROP_ENABLED (1 << 0) + +/* + * Re-Distributor registers, offsets from VLPI_base + */ +#define GICR_VPROPBASER 0x0070 + +#define GICR_VPROPBASER_IDBITS_MASK 0x1f + +#define GICR_VPROPBASER_SHAREABILITY_SHIFT (10) +#define GICR_VPROPBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_VPROPBASER_OUTER_CACHEABILITY_SHIFT (56) + +#define GICR_VPROPBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_VPROPBASER, SHAREABILITY_MASK) +#define GICR_VPROPBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, MASK) +#define GICR_VPROPBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPROPBASER, OUTER, MASK) +#define GICR_VPROPBASER_CACHEABILITY_MASK \ + GICR_VPROPBASER_INNER_CACHEABILITY_MASK + +#define GICR_VPROPBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_VPROPBASER, InnerShareable) + +#define GICR_VPROPBASER_nCnB GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, nCnB) +#define GICR_VPROPBASER_nC GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, nC) +#define GICR_VPROPBASER_RaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWt) +#define GICR_VPROPBASER_RaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWb) +#define GICR_VPROPBASER_WaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, WaWt) +#define GICR_VPROPBASER_WaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, WaWb) +#define GICR_VPROPBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWaWt) +#define GICR_VPROPBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWaWb) + +/* + * GICv4.1 VPROPBASER reinvention. A subtle mix between the old + * VPROPBASER and ITS_BASER. Just not quite any of the two. + */ +#define GICR_VPROPBASER_4_1_VALID (1ULL << 63) +#define GICR_VPROPBASER_4_1_ENTRY_SIZE GENMASK_ULL(61, 59) +#define GICR_VPROPBASER_4_1_INDIRECT (1ULL << 55) +#define GICR_VPROPBASER_4_1_PAGE_SIZE GENMASK_ULL(54, 53) +#define GICR_VPROPBASER_4_1_Z (1ULL << 52) +#define GICR_VPROPBASER_4_1_ADDR GENMASK_ULL(51, 12) +#define GICR_VPROPBASER_4_1_SIZE GENMASK_ULL(6, 0) + +#define GICR_VPENDBASER 0x0078 + +#define GICR_VPENDBASER_SHAREABILITY_SHIFT (10) +#define GICR_VPENDBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_VPENDBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_VPENDBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, SHAREABILITY_MASK) +#define GICR_VPENDBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, MASK) +#define GICR_VPENDBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPENDBASER, OUTER, MASK) +#define GICR_VPENDBASER_CACHEABILITY_MASK \ + GICR_VPENDBASER_INNER_CACHEABILITY_MASK + +#define GICR_VPENDBASER_NonShareable \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, NonShareable) + +#define GICR_VPENDBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, InnerShareable) + +#define GICR_VPENDBASER_nCnB GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, nCnB) +#define GICR_VPENDBASER_nC GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, nC) +#define GICR_VPENDBASER_RaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWt) +#define GICR_VPENDBASER_RaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWb) +#define GICR_VPENDBASER_WaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, WaWt) +#define GICR_VPENDBASER_WaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, WaWb) +#define GICR_VPENDBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWaWt) +#define GICR_VPENDBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWaWb) + +#define GICR_VPENDBASER_Dirty (1ULL << 60) +#define GICR_VPENDBASER_PendingLast (1ULL << 61) +#define GICR_VPENDBASER_IDAI (1ULL << 62) +#define GICR_VPENDBASER_Valid (1ULL << 63) + +/* + * GICv4.1 VPENDBASER, used for VPE residency. On top of these fields, + * also use the above Valid, PendingLast and Dirty. + */ +#define GICR_VPENDBASER_4_1_DB (1ULL << 62) +#define GICR_VPENDBASER_4_1_VGRP0EN (1ULL << 59) +#define GICR_VPENDBASER_4_1_VGRP1EN (1ULL << 58) +#define GICR_VPENDBASER_4_1_VPEID GENMASK_ULL(15, 0) + +#define GICR_VSGIR 0x0080 + +#define GICR_VSGIR_VPEID GENMASK(15, 0) + +#define GICR_VSGIPENDR 0x0088 + +#define GICR_VSGIPENDR_BUSY (1U << 31) +#define GICR_VSGIPENDR_PENDING GENMASK(15, 0) + +/* + * ITS registers, offsets from ITS_base + */ +#define GITS_CTLR 0x0000 +#define GITS_IIDR 0x0004 +#define GITS_TYPER 0x0008 +#define GITS_MPIDR 0x0018 +#define GITS_CBASER 0x0080 +#define GITS_CWRITER 0x0088 +#define GITS_CREADR 0x0090 +#define GITS_BASER 0x0100 +#define GITS_IDREGS_BASE 0xffd0 +#define GITS_PIDR0 0xffe0 +#define GITS_PIDR1 0xffe4 +#define GITS_PIDR2 GICR_PIDR2 +#define GITS_PIDR4 0xffd0 +#define GITS_CIDR0 0xfff0 +#define GITS_CIDR1 0xfff4 +#define GITS_CIDR2 0xfff8 +#define GITS_CIDR3 0xfffc + +#define GITS_TRANSLATER 0x10040 + +#define GITS_SGIR 0x20020 + +#define GITS_SGIR_VPEID GENMASK_ULL(47, 32) +#define GITS_SGIR_VINTID GENMASK_ULL(3, 0) + +#define GITS_CTLR_ENABLE (1U << 0) +#define GITS_CTLR_ImDe (1U << 1) +#define GITS_CTLR_ITS_NUMBER_SHIFT 4 +#define GITS_CTLR_ITS_NUMBER (0xFU << GITS_CTLR_ITS_NUMBER_SHIFT) +#define GITS_CTLR_QUIESCENT (1U << 31) + +#define GITS_TYPER_PLPIS (1UL << 0) +#define GITS_TYPER_VLPIS (1UL << 1) +#define GITS_TYPER_ITT_ENTRY_SIZE_SHIFT 4 +#define GITS_TYPER_ITT_ENTRY_SIZE GENMASK_ULL(7, 4) +#define GITS_TYPER_IDBITS_SHIFT 8 +#define GITS_TYPER_DEVBITS_SHIFT 13 +#define GITS_TYPER_DEVBITS GENMASK_ULL(17, 13) +#define GITS_TYPER_PTA (1UL << 19) +#define GITS_TYPER_HCC_SHIFT 24 +#define GITS_TYPER_HCC(r) (((r) >> GITS_TYPER_HCC_SHIFT) & 0xff) +#define GITS_TYPER_VMOVP (1ULL << 37) +#define GITS_TYPER_VMAPP (1ULL << 40) +#define GITS_TYPER_SVPET GENMASK_ULL(42, 41) + +#define GITS_IIDR_REV_SHIFT 12 +#define GITS_IIDR_REV_MASK (0xf << GITS_IIDR_REV_SHIFT) +#define GITS_IIDR_REV(r) (((r) >> GITS_IIDR_REV_SHIFT) & 0xf) +#define GITS_IIDR_PRODUCTID_SHIFT 24 + +#define GITS_CBASER_VALID (1ULL << 63) +#define GITS_CBASER_SHAREABILITY_SHIFT (10) +#define GITS_CBASER_INNER_CACHEABILITY_SHIFT (59) +#define GITS_CBASER_OUTER_CACHEABILITY_SHIFT (53) +#define GITS_CBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GITS_CBASER, SHAREABILITY_MASK) +#define GITS_CBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, MASK) +#define GITS_CBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_CBASER, OUTER, MASK) +#define GITS_CBASER_CACHEABILITY_MASK GITS_CBASER_INNER_CACHEABILITY_MASK + +#define GITS_CBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GITS_CBASER, InnerShareable) + +#define GITS_CBASER_nCnB GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, nCnB) +#define GITS_CBASER_nC GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, nC) +#define GITS_CBASER_RaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWt) +#define GITS_CBASER_RaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWb) +#define GITS_CBASER_WaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, WaWt) +#define GITS_CBASER_WaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, WaWb) +#define GITS_CBASER_RaWaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWt) +#define GITS_CBASER_RaWaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWb) + +#define GITS_CBASER_ADDRESS(cbaser) ((cbaser) & GENMASK_ULL(51, 12)) + +#define GITS_BASER_NR_REGS 8 + +#define GITS_BASER_VALID (1ULL << 63) +#define GITS_BASER_INDIRECT (1ULL << 62) + +#define GITS_BASER_INNER_CACHEABILITY_SHIFT (59) +#define GITS_BASER_OUTER_CACHEABILITY_SHIFT (53) +#define GITS_BASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_BASER, INNER, MASK) +#define GITS_BASER_CACHEABILITY_MASK GITS_BASER_INNER_CACHEABILITY_MASK +#define GITS_BASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_BASER, OUTER, MASK) +#define GITS_BASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GITS_BASER, SHAREABILITY_MASK) + +#define GITS_BASER_nCnB GIC_BASER_CACHEABILITY(GITS_BASER, INNER, nCnB) +#define GITS_BASER_nC GIC_BASER_CACHEABILITY(GITS_BASER, INNER, nC) +#define GITS_BASER_RaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWt) +#define GITS_BASER_RaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWb) +#define GITS_BASER_WaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, WaWt) +#define GITS_BASER_WaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, WaWb) +#define GITS_BASER_RaWaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWaWt) +#define GITS_BASER_RaWaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWaWb) + +#define GITS_BASER_TYPE_SHIFT (56) +#define GITS_BASER_TYPE(r) (((r) >> GITS_BASER_TYPE_SHIFT) & 7) +#define GITS_BASER_ENTRY_SIZE_SHIFT (48) +#define GITS_BASER_ENTRY_SIZE(r) ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0x1f) + 1) +#define GITS_BASER_ENTRY_SIZE_MASK GENMASK_ULL(52, 48) +#define GITS_BASER_PHYS_52_to_48(phys) \ + (((phys) & GENMASK_ULL(47, 16)) | (((phys) >> 48) & 0xf) << 12) +#define GITS_BASER_ADDR_48_to_52(baser) \ + (((baser) & GENMASK_ULL(47, 16)) | (((baser) >> 12) & 0xf) << 48) + +#define GITS_BASER_SHAREABILITY_SHIFT (10) +#define GITS_BASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GITS_BASER, InnerShareable) +#define GITS_BASER_PAGE_SIZE_SHIFT (8) +#define __GITS_BASER_PSZ(sz) (GIC_PAGE_SIZE_ ## sz << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_4K __GITS_BASER_PSZ(4K) +#define GITS_BASER_PAGE_SIZE_16K __GITS_BASER_PSZ(16K) +#define GITS_BASER_PAGE_SIZE_64K __GITS_BASER_PSZ(64K) +#define GITS_BASER_PAGE_SIZE_MASK __GITS_BASER_PSZ(MASK) +#define GITS_BASER_PAGES_MAX 256 +#define GITS_BASER_PAGES_SHIFT (0) +#define GITS_BASER_NR_PAGES(r) (((r) & 0xff) + 1) + +#define GITS_BASER_TYPE_NONE 0 +#define GITS_BASER_TYPE_DEVICE 1 +#define GITS_BASER_TYPE_VCPU 2 +#define GITS_BASER_TYPE_RESERVED3 3 +#define GITS_BASER_TYPE_COLLECTION 4 +#define GITS_BASER_TYPE_RESERVED5 5 +#define GITS_BASER_TYPE_RESERVED6 6 +#define GITS_BASER_TYPE_RESERVED7 7 + +#define GITS_LVL1_ENTRY_SIZE (8UL) + +/* + * ITS commands + */ +#define GITS_CMD_MAPD 0x08 +#define GITS_CMD_MAPC 0x09 +#define GITS_CMD_MAPTI 0x0a +#define GITS_CMD_MAPI 0x0b +#define GITS_CMD_MOVI 0x01 +#define GITS_CMD_DISCARD 0x0f +#define GITS_CMD_INV 0x0c +#define GITS_CMD_MOVALL 0x0e +#define GITS_CMD_INVALL 0x0d +#define GITS_CMD_INT 0x03 +#define GITS_CMD_CLEAR 0x04 +#define GITS_CMD_SYNC 0x05 + +/* + * GICv4 ITS specific commands + */ +#define GITS_CMD_GICv4(x) ((x) | 0x20) +#define GITS_CMD_VINVALL GITS_CMD_GICv4(GITS_CMD_INVALL) +#define GITS_CMD_VMAPP GITS_CMD_GICv4(GITS_CMD_MAPC) +#define GITS_CMD_VMAPTI GITS_CMD_GICv4(GITS_CMD_MAPTI) +#define GITS_CMD_VMOVI GITS_CMD_GICv4(GITS_CMD_MOVI) +#define GITS_CMD_VSYNC GITS_CMD_GICv4(GITS_CMD_SYNC) +/* VMOVP, VSGI and INVDB are the odd ones, as they dont have a physical counterpart */ +#define GITS_CMD_VMOVP GITS_CMD_GICv4(2) +#define GITS_CMD_VSGI GITS_CMD_GICv4(3) +#define GITS_CMD_INVDB GITS_CMD_GICv4(0xe) + +/* + * ITS error numbers + */ +#define E_ITS_MOVI_UNMAPPED_INTERRUPT 0x010107 +#define E_ITS_MOVI_UNMAPPED_COLLECTION 0x010109 +#define E_ITS_INT_UNMAPPED_INTERRUPT 0x010307 +#define E_ITS_CLEAR_UNMAPPED_INTERRUPT 0x010507 +#define E_ITS_MAPD_DEVICE_OOR 0x010801 +#define E_ITS_MAPD_ITTSIZE_OOR 0x010802 +#define E_ITS_MAPC_PROCNUM_OOR 0x010902 +#define E_ITS_MAPC_COLLECTION_OOR 0x010903 +#define E_ITS_MAPTI_UNMAPPED_DEVICE 0x010a04 +#define E_ITS_MAPTI_ID_OOR 0x010a05 +#define E_ITS_MAPTI_PHYSICALID_OOR 0x010a06 +#define E_ITS_INV_UNMAPPED_INTERRUPT 0x010c07 +#define E_ITS_INVALL_UNMAPPED_COLLECTION 0x010d09 +#define E_ITS_MOVALL_PROCNUM_OOR 0x010e01 +#define E_ITS_DISCARD_UNMAPPED_INTERRUPT 0x010f07 + +/* + * CPU interface registers + */ +#define ICC_CTLR_EL1_EOImode_SHIFT (1) +#define ICC_CTLR_EL1_EOImode_drop_dir (0U << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_EOImode_drop (1U << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_EOImode_MASK (1 << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_CBPR_SHIFT 0 +#define ICC_CTLR_EL1_CBPR_MASK (1 << ICC_CTLR_EL1_CBPR_SHIFT) +#define ICC_CTLR_EL1_PMHE_SHIFT 6 +#define ICC_CTLR_EL1_PMHE_MASK (1 << ICC_CTLR_EL1_PMHE_SHIFT) +#define ICC_CTLR_EL1_PRI_BITS_SHIFT 8 +#define ICC_CTLR_EL1_PRI_BITS_MASK (0x7 << ICC_CTLR_EL1_PRI_BITS_SHIFT) +#define ICC_CTLR_EL1_ID_BITS_SHIFT 11 +#define ICC_CTLR_EL1_ID_BITS_MASK (0x7 << ICC_CTLR_EL1_ID_BITS_SHIFT) +#define ICC_CTLR_EL1_SEIS_SHIFT 14 +#define ICC_CTLR_EL1_SEIS_MASK (0x1 << ICC_CTLR_EL1_SEIS_SHIFT) +#define ICC_CTLR_EL1_A3V_SHIFT 15 +#define ICC_CTLR_EL1_A3V_MASK (0x1 << ICC_CTLR_EL1_A3V_SHIFT) +#define ICC_CTLR_EL1_RSS (0x1 << 18) +#define ICC_CTLR_EL1_ExtRange (0x1 << 19) +#define ICC_PMR_EL1_SHIFT 0 +#define ICC_PMR_EL1_MASK (0xff << ICC_PMR_EL1_SHIFT) +#define ICC_BPR0_EL1_SHIFT 0 +#define ICC_BPR0_EL1_MASK (0x7 << ICC_BPR0_EL1_SHIFT) +#define ICC_BPR1_EL1_SHIFT 0 +#define ICC_BPR1_EL1_MASK (0x7 << ICC_BPR1_EL1_SHIFT) +#define ICC_IGRPEN0_EL1_SHIFT 0 +#define ICC_IGRPEN0_EL1_MASK (1 << ICC_IGRPEN0_EL1_SHIFT) +#define ICC_IGRPEN1_EL1_SHIFT 0 +#define ICC_IGRPEN1_EL1_MASK (1 << ICC_IGRPEN1_EL1_SHIFT) +#define ICC_SRE_EL1_DIB (1U << 2) +#define ICC_SRE_EL1_DFB (1U << 1) +#define ICC_SRE_EL1_SRE (1U << 0) + +/* + * Hypervisor interface registers (SRE only) + */ +#define ICH_LR_VIRTUAL_ID_MASK ((1ULL << 32) - 1) + +#define ICH_LR_EOI (1ULL << 41) +#define ICH_LR_GROUP (1ULL << 60) +#define ICH_LR_HW (1ULL << 61) +#define ICH_LR_STATE (3ULL << 62) +#define ICH_LR_PENDING_BIT (1ULL << 62) +#define ICH_LR_ACTIVE_BIT (1ULL << 63) +#define ICH_LR_PHYS_ID_SHIFT 32 +#define ICH_LR_PHYS_ID_MASK (0x3ffULL << ICH_LR_PHYS_ID_SHIFT) +#define ICH_LR_PRIORITY_SHIFT 48 +#define ICH_LR_PRIORITY_MASK (0xffULL << ICH_LR_PRIORITY_SHIFT) + +/* These are for GICv2 emulation only */ +#define GICH_LR_VIRTUALID (0x3ffUL << 0) +#define GICH_LR_PHYSID_CPUID_SHIFT (10) +#define GICH_LR_PHYSID_CPUID (7UL << GICH_LR_PHYSID_CPUID_SHIFT) + +#define ICH_MISR_EOI (1 << 0) +#define ICH_MISR_U (1 << 1) + +#define ICH_HCR_EN (1 << 0) +#define ICH_HCR_UIE (1 << 1) +#define ICH_HCR_NPIE (1 << 3) +#define ICH_HCR_TC (1 << 10) +#define ICH_HCR_TALL0 (1 << 11) +#define ICH_HCR_TALL1 (1 << 12) +#define ICH_HCR_EOIcount_SHIFT 27 +#define ICH_HCR_EOIcount_MASK (0x1f << ICH_HCR_EOIcount_SHIFT) + +#define ICH_VMCR_ACK_CTL_SHIFT 2 +#define ICH_VMCR_ACK_CTL_MASK (1 << ICH_VMCR_ACK_CTL_SHIFT) +#define ICH_VMCR_FIQ_EN_SHIFT 3 +#define ICH_VMCR_FIQ_EN_MASK (1 << ICH_VMCR_FIQ_EN_SHIFT) +#define ICH_VMCR_CBPR_SHIFT 4 +#define ICH_VMCR_CBPR_MASK (1 << ICH_VMCR_CBPR_SHIFT) +#define ICH_VMCR_EOIM_SHIFT 9 +#define ICH_VMCR_EOIM_MASK (1 << ICH_VMCR_EOIM_SHIFT) +#define ICH_VMCR_BPR1_SHIFT 18 +#define ICH_VMCR_BPR1_MASK (7 << ICH_VMCR_BPR1_SHIFT) +#define ICH_VMCR_BPR0_SHIFT 21 +#define ICH_VMCR_BPR0_MASK (7 << ICH_VMCR_BPR0_SHIFT) +#define ICH_VMCR_PMR_SHIFT 24 +#define ICH_VMCR_PMR_MASK (0xffUL << ICH_VMCR_PMR_SHIFT) +#define ICH_VMCR_ENG0_SHIFT 0 +#define ICH_VMCR_ENG0_MASK (1 << ICH_VMCR_ENG0_SHIFT) +#define ICH_VMCR_ENG1_SHIFT 1 +#define ICH_VMCR_ENG1_MASK (1 << ICH_VMCR_ENG1_SHIFT) + +#define ICH_VTR_PRI_BITS_SHIFT 29 +#define ICH_VTR_PRI_BITS_MASK (7 << ICH_VTR_PRI_BITS_SHIFT) +#define ICH_VTR_ID_BITS_SHIFT 23 +#define ICH_VTR_ID_BITS_MASK (7 << ICH_VTR_ID_BITS_SHIFT) +#define ICH_VTR_SEIS_SHIFT 22 +#define ICH_VTR_SEIS_MASK (1 << ICH_VTR_SEIS_SHIFT) +#define ICH_VTR_A3V_SHIFT 21 +#define ICH_VTR_A3V_MASK (1 << ICH_VTR_A3V_SHIFT) + +#define ICC_IAR1_EL1_SPURIOUS 0x3ff + +#define ICC_SRE_EL2_SRE (1 << 0) +#define ICC_SRE_EL2_ENABLE (1 << 3) + +#define ICC_SGI1R_TARGET_LIST_SHIFT 0 +#define ICC_SGI1R_TARGET_LIST_MASK (0xffff << ICC_SGI1R_TARGET_LIST_SHIFT) +#define ICC_SGI1R_AFFINITY_1_SHIFT 16 +#define ICC_SGI1R_AFFINITY_1_MASK (0xff << ICC_SGI1R_AFFINITY_1_SHIFT) +#define ICC_SGI1R_SGI_ID_SHIFT 24 +#define ICC_SGI1R_SGI_ID_MASK (0xfULL << ICC_SGI1R_SGI_ID_SHIFT) +#define ICC_SGI1R_AFFINITY_2_SHIFT 32 +#define ICC_SGI1R_AFFINITY_2_MASK (0xffULL << ICC_SGI1R_AFFINITY_2_SHIFT) +#define ICC_SGI1R_IRQ_ROUTING_MODE_BIT 40 +#define ICC_SGI1R_RS_SHIFT 44 +#define ICC_SGI1R_RS_MASK (0xfULL << ICC_SGI1R_RS_SHIFT) +#define ICC_SGI1R_AFFINITY_3_SHIFT 48 +#define ICC_SGI1R_AFFINITY_3_MASK (0xffULL << ICC_SGI1R_AFFINITY_3_SHIFT) + +#include <asm/arch_gicv3.h> + +#ifndef __ASSEMBLY__ + +/* + * We need a value to serve as a irq-type for LPIs. Choose one that will + * hopefully pique the interest of the reviewer. + */ +#define GIC_IRQ_TYPE_LPI 0xa110c8ed + +struct rdists { + struct { + raw_spinlock_t rd_lock; + void __iomem *rd_base; + struct page *pend_page; + phys_addr_t phys_base; + bool lpi_enabled; + cpumask_t *vpe_table_mask; + void *vpe_l1_base; + } __percpu *rdist; + phys_addr_t prop_table_pa; + void *prop_table_va; + u64 flags; + u32 gicd_typer; + u32 gicd_typer2; + bool has_vlpis; + bool has_rvpeid; + bool has_direct_lpi; + bool has_vpend_valid_dirty; +}; + +struct irq_domain; +struct fwnode_handle; +int phytium_its_cpu_init(void); +int phytium_its_init(struct fwnode_handle *handle, struct rdists *rdists, + struct irq_domain *domain); +int mbi_init(struct fwnode_handle *fwnode, struct irq_domain *parent); + +static inline bool gic_enable_sre(void) +{ + u32 val; + + val = gic_read_sre(); + if (val & ICC_SRE_EL1_SRE) + return true; + + val |= ICC_SRE_EL1_SRE; + gic_write_sre(val); + val = gic_read_sre(); + + return !!(val & ICC_SRE_EL1_SRE); +} + +#endif + +#endif -- 1.8.3.1