1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2cc2d3216SMarc Zyngier /* 3d7276b80SMarc Zyngier * Copyright (C) 2013-2017 ARM Limited, All Rights Reserved. 4cc2d3216SMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 5cc2d3216SMarc Zyngier */ 6cc2d3216SMarc Zyngier 73f010cf1STomasz Nowicki #include <linux/acpi.h> 88d3554b8SHanjun Guo #include <linux/acpi_iort.h> 9ffedbf0cSMarc Zyngier #include <linux/bitfield.h> 10cc2d3216SMarc Zyngier #include <linux/bitmap.h> 11cc2d3216SMarc Zyngier #include <linux/cpu.h> 12c6e2ccb6SMarc Zyngier #include <linux/crash_dump.h> 13cc2d3216SMarc Zyngier #include <linux/delay.h> 1444bb7e24SRobin Murphy #include <linux/dma-iommu.h> 153fb68faeSMarc Zyngier #include <linux/efi.h> 16cc2d3216SMarc Zyngier #include <linux/interrupt.h> 1796806229SMarc Zyngier #include <linux/iopoll.h> 183f010cf1STomasz Nowicki #include <linux/irqdomain.h> 19880cb3cdSMarc Zyngier #include <linux/list.h> 20cc2d3216SMarc Zyngier #include <linux/log2.h> 215e2c9f9aSMarc Zyngier #include <linux/memblock.h> 22cc2d3216SMarc Zyngier #include <linux/mm.h> 23cc2d3216SMarc Zyngier #include <linux/msi.h> 24cc2d3216SMarc Zyngier #include <linux/of.h> 25cc2d3216SMarc Zyngier #include <linux/of_address.h> 26cc2d3216SMarc Zyngier #include <linux/of_irq.h> 27cc2d3216SMarc Zyngier #include <linux/of_pci.h> 28cc2d3216SMarc Zyngier #include <linux/of_platform.h> 29cc2d3216SMarc Zyngier #include <linux/percpu.h> 30cc2d3216SMarc Zyngier #include <linux/slab.h> 31dba0bc7bSDerek Basehore #include <linux/syscore_ops.h> 32cc2d3216SMarc Zyngier 3341a83e06SJoel Porquet #include <linux/irqchip.h> 34cc2d3216SMarc Zyngier #include <linux/irqchip/arm-gic-v3.h> 35c808eea8SMarc Zyngier #include <linux/irqchip/arm-gic-v4.h> 36cc2d3216SMarc Zyngier 37cc2d3216SMarc Zyngier #include <asm/cputype.h> 38cc2d3216SMarc Zyngier #include <asm/exception.h> 39cc2d3216SMarc Zyngier 4067510ccaSRobert Richter #include "irq-gic-common.h" 4167510ccaSRobert Richter 4294100970SRobert Richter #define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) 4394100970SRobert Richter #define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) 44fbf8f40eSGanapatrao Kulkarni #define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2) 45cc2d3216SMarc Zyngier 46c48ed51cSMarc Zyngier #define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0) 47c440a9d9SMarc Zyngier #define RDIST_FLAGS_RD_TABLES_PREALLOCATED (1 << 1) 48c48ed51cSMarc Zyngier 49a13b0404SMarc Zyngier static u32 lpi_id_bits; 50a13b0404SMarc Zyngier 51a13b0404SMarc Zyngier /* 52a13b0404SMarc Zyngier * We allocate memory for PROPBASE to cover 2 ^ lpi_id_bits LPIs to 53a13b0404SMarc Zyngier * deal with (one configuration byte per interrupt). PENDBASE has to 54a13b0404SMarc Zyngier * be 64kB aligned (one bit per LPI, plus 8192 bits for SPI/PPI/SGI). 55a13b0404SMarc Zyngier */ 56a13b0404SMarc Zyngier #define LPI_NRBITS lpi_id_bits 57a13b0404SMarc Zyngier #define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K) 58a13b0404SMarc Zyngier #define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K) 59a13b0404SMarc Zyngier 602130b789SJulien Thierry #define LPI_PROP_DEFAULT_PRIO GICD_INT_DEF_PRI 61a13b0404SMarc Zyngier 62cc2d3216SMarc Zyngier /* 63cc2d3216SMarc Zyngier * Collection structure - just an ID, and a redistributor address to 64cc2d3216SMarc Zyngier * ping. We use one per CPU as a bag of interrupts assigned to this 65cc2d3216SMarc Zyngier * CPU. 66cc2d3216SMarc Zyngier */ 67cc2d3216SMarc Zyngier struct its_collection { 68cc2d3216SMarc Zyngier u64 target_address; 69cc2d3216SMarc Zyngier u16 col_id; 70cc2d3216SMarc Zyngier }; 71cc2d3216SMarc Zyngier 72cc2d3216SMarc Zyngier /* 739347359aSShanker Donthineni * The ITS_BASER structure - contains memory information, cached 749347359aSShanker Donthineni * value of BASER register configuration and ITS page size. 75466b7d16SShanker Donthineni */ 76466b7d16SShanker Donthineni struct its_baser { 77466b7d16SShanker Donthineni void *base; 78466b7d16SShanker Donthineni u64 val; 79466b7d16SShanker Donthineni u32 order; 809347359aSShanker Donthineni u32 psz; 81466b7d16SShanker Donthineni }; 82466b7d16SShanker Donthineni 83558b0165SArd Biesheuvel struct its_device; 84558b0165SArd Biesheuvel 85466b7d16SShanker Donthineni /* 86cc2d3216SMarc Zyngier * The ITS structure - contains most of the infrastructure, with the 87841514abSMarc Zyngier * top-level MSI domain, the command queue, the collections, and the 88841514abSMarc Zyngier * list of devices writing to it. 899791ec7dSMarc Zyngier * 909791ec7dSMarc Zyngier * dev_alloc_lock has to be taken for device allocations, while the 919791ec7dSMarc Zyngier * spinlock must be taken to parse data structures such as the device 929791ec7dSMarc Zyngier * list. 93cc2d3216SMarc Zyngier */ 94cc2d3216SMarc Zyngier struct its_node { 95cc2d3216SMarc Zyngier raw_spinlock_t lock; 969791ec7dSMarc Zyngier struct mutex dev_alloc_lock; 97cc2d3216SMarc Zyngier struct list_head entry; 98cc2d3216SMarc Zyngier void __iomem *base; 995e46a484SMarc Zyngier void __iomem *sgir_base; 100db40f0a7STomasz Nowicki phys_addr_t phys_base; 101cc2d3216SMarc Zyngier struct its_cmd_block *cmd_base; 102cc2d3216SMarc Zyngier struct its_cmd_block *cmd_write; 103466b7d16SShanker Donthineni struct its_baser tables[GITS_BASER_NR_REGS]; 104cc2d3216SMarc Zyngier struct its_collection *collections; 105558b0165SArd Biesheuvel struct fwnode_handle *fwnode_handle; 106558b0165SArd Biesheuvel u64 (*get_msi_base)(struct its_device *its_dev); 1070dd57fedSMarc Zyngier u64 typer; 108dba0bc7bSDerek Basehore u64 cbaser_save; 109dba0bc7bSDerek Basehore u32 ctlr_save; 1105e516846SMarc Zyngier u32 mpidr; 111cc2d3216SMarc Zyngier struct list_head its_device_list; 112cc2d3216SMarc Zyngier u64 flags; 113debf6d02SMarc Zyngier unsigned long list_nr; 114fbf8f40eSGanapatrao Kulkarni int numa_node; 115558b0165SArd Biesheuvel unsigned int msi_domain_flags; 116558b0165SArd Biesheuvel u32 pre_its_base; /* for Socionext Synquacer */ 1175c9a882eSMarc Zyngier int vlpi_redist_offset; 118cc2d3216SMarc Zyngier }; 119cc2d3216SMarc Zyngier 1200dd57fedSMarc Zyngier #define is_v4(its) (!!((its)->typer & GITS_TYPER_VLPIS)) 1215e516846SMarc Zyngier #define is_v4_1(its) (!!((its)->typer & GITS_TYPER_VMAPP)) 122576a8342SMarc Zyngier #define device_ids(its) (FIELD_GET(GITS_TYPER_DEVBITS, (its)->typer) + 1) 1230dd57fedSMarc Zyngier 124cc2d3216SMarc Zyngier #define ITS_ITT_ALIGN SZ_256 125cc2d3216SMarc Zyngier 12632bd44dcSShanker Donthineni /* The maximum number of VPEID bits supported by VLPI commands */ 127f2d83409SMarc Zyngier #define ITS_MAX_VPEID_BITS \ 128f2d83409SMarc Zyngier ({ \ 129f2d83409SMarc Zyngier int nvpeid = 16; \ 130f2d83409SMarc Zyngier if (gic_rdists->has_rvpeid && \ 131f2d83409SMarc Zyngier gic_rdists->gicd_typer2 & GICD_TYPER2_VIL) \ 132f2d83409SMarc Zyngier nvpeid = 1 + (gic_rdists->gicd_typer2 & \ 133f2d83409SMarc Zyngier GICD_TYPER2_VID); \ 134f2d83409SMarc Zyngier \ 135f2d83409SMarc Zyngier nvpeid; \ 136f2d83409SMarc Zyngier }) 13732bd44dcSShanker Donthineni #define ITS_MAX_VPEID (1 << (ITS_MAX_VPEID_BITS)) 13832bd44dcSShanker Donthineni 1392eca0d6cSShanker Donthineni /* Convert page order to size in bytes */ 1402eca0d6cSShanker Donthineni #define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o)) 1412eca0d6cSShanker Donthineni 142591e5becSMarc Zyngier struct event_lpi_map { 143591e5becSMarc Zyngier unsigned long *lpi_map; 144591e5becSMarc Zyngier u16 *col_map; 145591e5becSMarc Zyngier irq_hw_number_t lpi_base; 146591e5becSMarc Zyngier int nr_lpis; 14711635fa2SMarc Zyngier raw_spinlock_t vlpi_lock; 148d011e4e6SMarc Zyngier struct its_vm *vm; 149d011e4e6SMarc Zyngier struct its_vlpi_map *vlpi_maps; 150d011e4e6SMarc Zyngier int nr_vlpis; 151591e5becSMarc Zyngier }; 152591e5becSMarc Zyngier 153cc2d3216SMarc Zyngier /* 154d011e4e6SMarc Zyngier * The ITS view of a device - belongs to an ITS, owns an interrupt 155d011e4e6SMarc Zyngier * translation table, and a list of interrupts. If it some of its 156d011e4e6SMarc Zyngier * LPIs are injected into a guest (GICv4), the event_map.vm field 157d011e4e6SMarc Zyngier * indicates which one. 158cc2d3216SMarc Zyngier */ 159cc2d3216SMarc Zyngier struct its_device { 160cc2d3216SMarc Zyngier struct list_head entry; 161cc2d3216SMarc Zyngier struct its_node *its; 162591e5becSMarc Zyngier struct event_lpi_map event_map; 163cc2d3216SMarc Zyngier void *itt; 164cc2d3216SMarc Zyngier u32 nr_ites; 165cc2d3216SMarc Zyngier u32 device_id; 1669791ec7dSMarc Zyngier bool shared; 167cc2d3216SMarc Zyngier }; 168cc2d3216SMarc Zyngier 16920b3d54eSMarc Zyngier static struct { 17020b3d54eSMarc Zyngier raw_spinlock_t lock; 17120b3d54eSMarc Zyngier struct its_device *dev; 17220b3d54eSMarc Zyngier struct its_vpe **vpes; 17320b3d54eSMarc Zyngier int next_victim; 17420b3d54eSMarc Zyngier } vpe_proxy; 17520b3d54eSMarc Zyngier 1762f13ff1dSMarc Zyngier struct cpu_lpi_count { 1772f13ff1dSMarc Zyngier atomic_t managed; 1782f13ff1dSMarc Zyngier atomic_t unmanaged; 1792f13ff1dSMarc Zyngier }; 1802f13ff1dSMarc Zyngier 1812f13ff1dSMarc Zyngier static DEFINE_PER_CPU(struct cpu_lpi_count, cpu_lpi_count); 1822f13ff1dSMarc Zyngier 1831ac19ca6SMarc Zyngier static LIST_HEAD(its_nodes); 184a8db7456SSebastian Andrzej Siewior static DEFINE_RAW_SPINLOCK(its_lock); 1851ac19ca6SMarc Zyngier static struct rdists *gic_rdists; 186db40f0a7STomasz Nowicki static struct irq_domain *its_parent; 1871ac19ca6SMarc Zyngier 1883dfa576bSMarc Zyngier static unsigned long its_list_map; 1893171a47aSMarc Zyngier static u16 vmovp_seq_num; 1903171a47aSMarc Zyngier static DEFINE_RAW_SPINLOCK(vmovp_lock); 1913171a47aSMarc Zyngier 1927d75bbb4SMarc Zyngier static DEFINE_IDA(its_vpeid_ida); 1933dfa576bSMarc Zyngier 1941ac19ca6SMarc Zyngier #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) 19511e37d35SMarc Zyngier #define gic_data_rdist_cpu(cpu) (per_cpu_ptr(gic_rdists->rdist, cpu)) 1961ac19ca6SMarc Zyngier #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) 197e643d803SMarc Zyngier #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) 1981ac19ca6SMarc Zyngier 199009384b3SMarc Zyngier /* 200009384b3SMarc Zyngier * Skip ITSs that have no vLPIs mapped, unless we're on GICv4.1, as we 201009384b3SMarc Zyngier * always have vSGIs mapped. 202009384b3SMarc Zyngier */ 203009384b3SMarc Zyngier static bool require_its_list_vmovp(struct its_vm *vm, struct its_node *its) 204009384b3SMarc Zyngier { 205009384b3SMarc Zyngier return (gic_rdists->has_rvpeid || vm->vlpi_count[its->list_nr]); 206009384b3SMarc Zyngier } 207009384b3SMarc Zyngier 20884243125SZenghui Yu static u16 get_its_list(struct its_vm *vm) 20984243125SZenghui Yu { 21084243125SZenghui Yu struct its_node *its; 21184243125SZenghui Yu unsigned long its_list = 0; 21284243125SZenghui Yu 21384243125SZenghui Yu list_for_each_entry(its, &its_nodes, entry) { 2140dd57fedSMarc Zyngier if (!is_v4(its)) 21584243125SZenghui Yu continue; 21684243125SZenghui Yu 217009384b3SMarc Zyngier if (require_its_list_vmovp(vm, its)) 21884243125SZenghui Yu __set_bit(its->list_nr, &its_list); 21984243125SZenghui Yu } 22084243125SZenghui Yu 22184243125SZenghui Yu return (u16)its_list; 22284243125SZenghui Yu } 22384243125SZenghui Yu 224425c09beSMarc Zyngier static inline u32 its_get_event_id(struct irq_data *d) 225425c09beSMarc Zyngier { 226425c09beSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 227425c09beSMarc Zyngier return d->hwirq - its_dev->event_map.lpi_base; 228425c09beSMarc Zyngier } 229425c09beSMarc Zyngier 230591e5becSMarc Zyngier static struct its_collection *dev_event_to_col(struct its_device *its_dev, 231591e5becSMarc Zyngier u32 event) 232591e5becSMarc Zyngier { 233591e5becSMarc Zyngier struct its_node *its = its_dev->its; 234591e5becSMarc Zyngier 235591e5becSMarc Zyngier return its->collections + its_dev->event_map.col_map[event]; 236591e5becSMarc Zyngier } 237591e5becSMarc Zyngier 238c1d4d5cdSMarc Zyngier static struct its_vlpi_map *dev_event_to_vlpi_map(struct its_device *its_dev, 239c1d4d5cdSMarc Zyngier u32 event) 240c1d4d5cdSMarc Zyngier { 241c1d4d5cdSMarc Zyngier if (WARN_ON_ONCE(event >= its_dev->event_map.nr_lpis)) 242c1d4d5cdSMarc Zyngier return NULL; 243c1d4d5cdSMarc Zyngier 244c1d4d5cdSMarc Zyngier return &its_dev->event_map.vlpi_maps[event]; 245c1d4d5cdSMarc Zyngier } 246c1d4d5cdSMarc Zyngier 247f4a81f5aSMarc Zyngier static struct its_vlpi_map *get_vlpi_map(struct irq_data *d) 248f4a81f5aSMarc Zyngier { 249f4a81f5aSMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 250f4a81f5aSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 251f4a81f5aSMarc Zyngier u32 event = its_get_event_id(d); 252f4a81f5aSMarc Zyngier 253f4a81f5aSMarc Zyngier return dev_event_to_vlpi_map(its_dev, event); 254f4a81f5aSMarc Zyngier } 255f4a81f5aSMarc Zyngier 256f4a81f5aSMarc Zyngier return NULL; 257f4a81f5aSMarc Zyngier } 258f4a81f5aSMarc Zyngier 259f3a05921SMarc Zyngier static int vpe_to_cpuid_lock(struct its_vpe *vpe, unsigned long *flags) 260425c09beSMarc Zyngier { 261f3a05921SMarc Zyngier raw_spin_lock_irqsave(&vpe->vpe_lock, *flags); 262f3a05921SMarc Zyngier return vpe->col_idx; 263f3a05921SMarc Zyngier } 264f3a05921SMarc Zyngier 265f3a05921SMarc Zyngier static void vpe_to_cpuid_unlock(struct its_vpe *vpe, unsigned long flags) 266f3a05921SMarc Zyngier { 267f3a05921SMarc Zyngier raw_spin_unlock_irqrestore(&vpe->vpe_lock, flags); 268f3a05921SMarc Zyngier } 269f3a05921SMarc Zyngier 270f3a05921SMarc Zyngier static int irq_to_cpuid_lock(struct irq_data *d, unsigned long *flags) 271f3a05921SMarc Zyngier { 272f3a05921SMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 273f3a05921SMarc Zyngier int cpu; 274f3a05921SMarc Zyngier 275f3a05921SMarc Zyngier if (map) { 276f3a05921SMarc Zyngier cpu = vpe_to_cpuid_lock(map->vpe, flags); 277f3a05921SMarc Zyngier } else { 278f3a05921SMarc Zyngier /* Physical LPIs are already locked via the irq_desc lock */ 279425c09beSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 280f3a05921SMarc Zyngier cpu = its_dev->event_map.col_map[its_get_event_id(d)]; 281f3a05921SMarc Zyngier /* Keep GCC quiet... */ 282f3a05921SMarc Zyngier *flags = 0; 283f3a05921SMarc Zyngier } 284f3a05921SMarc Zyngier 285f3a05921SMarc Zyngier return cpu; 286f3a05921SMarc Zyngier } 287f3a05921SMarc Zyngier 288f3a05921SMarc Zyngier static void irq_to_cpuid_unlock(struct irq_data *d, unsigned long flags) 289f3a05921SMarc Zyngier { 290f4a81f5aSMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 291425c09beSMarc Zyngier 292f4a81f5aSMarc Zyngier if (map) 293f3a05921SMarc Zyngier vpe_to_cpuid_unlock(map->vpe, flags); 294425c09beSMarc Zyngier } 295425c09beSMarc Zyngier 29683559b47SMarc Zyngier static struct its_collection *valid_col(struct its_collection *col) 29783559b47SMarc Zyngier { 29820faba84SJoe Perches if (WARN_ON_ONCE(col->target_address & GENMASK_ULL(15, 0))) 29983559b47SMarc Zyngier return NULL; 30083559b47SMarc Zyngier 30183559b47SMarc Zyngier return col; 30283559b47SMarc Zyngier } 30383559b47SMarc Zyngier 304205e065dSMarc Zyngier static struct its_vpe *valid_vpe(struct its_node *its, struct its_vpe *vpe) 305205e065dSMarc Zyngier { 306205e065dSMarc Zyngier if (valid_col(its->collections + vpe->col_idx)) 307205e065dSMarc Zyngier return vpe; 308205e065dSMarc Zyngier 309205e065dSMarc Zyngier return NULL; 310205e065dSMarc Zyngier } 311205e065dSMarc Zyngier 312cc2d3216SMarc Zyngier /* 313cc2d3216SMarc Zyngier * ITS command descriptors - parameters to be encoded in a command 314cc2d3216SMarc Zyngier * block. 315cc2d3216SMarc Zyngier */ 316cc2d3216SMarc Zyngier struct its_cmd_desc { 317cc2d3216SMarc Zyngier union { 318cc2d3216SMarc Zyngier struct { 319cc2d3216SMarc Zyngier struct its_device *dev; 320cc2d3216SMarc Zyngier u32 event_id; 321cc2d3216SMarc Zyngier } its_inv_cmd; 322cc2d3216SMarc Zyngier 323cc2d3216SMarc Zyngier struct { 324cc2d3216SMarc Zyngier struct its_device *dev; 325cc2d3216SMarc Zyngier u32 event_id; 3268d85dcedSMarc Zyngier } its_clear_cmd; 3278d85dcedSMarc Zyngier 3288d85dcedSMarc Zyngier struct { 3298d85dcedSMarc Zyngier struct its_device *dev; 3308d85dcedSMarc Zyngier u32 event_id; 331cc2d3216SMarc Zyngier } its_int_cmd; 332cc2d3216SMarc Zyngier 333cc2d3216SMarc Zyngier struct { 334cc2d3216SMarc Zyngier struct its_device *dev; 335cc2d3216SMarc Zyngier int valid; 336cc2d3216SMarc Zyngier } its_mapd_cmd; 337cc2d3216SMarc Zyngier 338cc2d3216SMarc Zyngier struct { 339cc2d3216SMarc Zyngier struct its_collection *col; 340cc2d3216SMarc Zyngier int valid; 341cc2d3216SMarc Zyngier } its_mapc_cmd; 342cc2d3216SMarc Zyngier 343cc2d3216SMarc Zyngier struct { 344cc2d3216SMarc Zyngier struct its_device *dev; 345cc2d3216SMarc Zyngier u32 phys_id; 346cc2d3216SMarc Zyngier u32 event_id; 3476a25ad3aSMarc Zyngier } its_mapti_cmd; 348cc2d3216SMarc Zyngier 349cc2d3216SMarc Zyngier struct { 350cc2d3216SMarc Zyngier struct its_device *dev; 351cc2d3216SMarc Zyngier struct its_collection *col; 352591e5becSMarc Zyngier u32 event_id; 353cc2d3216SMarc Zyngier } its_movi_cmd; 354cc2d3216SMarc Zyngier 355cc2d3216SMarc Zyngier struct { 356cc2d3216SMarc Zyngier struct its_device *dev; 357cc2d3216SMarc Zyngier u32 event_id; 358cc2d3216SMarc Zyngier } its_discard_cmd; 359cc2d3216SMarc Zyngier 360cc2d3216SMarc Zyngier struct { 361cc2d3216SMarc Zyngier struct its_collection *col; 362cc2d3216SMarc Zyngier } its_invall_cmd; 363d011e4e6SMarc Zyngier 364d011e4e6SMarc Zyngier struct { 365d011e4e6SMarc Zyngier struct its_vpe *vpe; 366eb78192bSMarc Zyngier } its_vinvall_cmd; 367eb78192bSMarc Zyngier 368eb78192bSMarc Zyngier struct { 369eb78192bSMarc Zyngier struct its_vpe *vpe; 370eb78192bSMarc Zyngier struct its_collection *col; 371eb78192bSMarc Zyngier bool valid; 372eb78192bSMarc Zyngier } its_vmapp_cmd; 373eb78192bSMarc Zyngier 374eb78192bSMarc Zyngier struct { 375eb78192bSMarc Zyngier struct its_vpe *vpe; 376d011e4e6SMarc Zyngier struct its_device *dev; 377d011e4e6SMarc Zyngier u32 virt_id; 378d011e4e6SMarc Zyngier u32 event_id; 379d011e4e6SMarc Zyngier bool db_enabled; 380d011e4e6SMarc Zyngier } its_vmapti_cmd; 381d011e4e6SMarc Zyngier 382d011e4e6SMarc Zyngier struct { 383d011e4e6SMarc Zyngier struct its_vpe *vpe; 384d011e4e6SMarc Zyngier struct its_device *dev; 385d011e4e6SMarc Zyngier u32 event_id; 386d011e4e6SMarc Zyngier bool db_enabled; 387d011e4e6SMarc Zyngier } its_vmovi_cmd; 3883171a47aSMarc Zyngier 3893171a47aSMarc Zyngier struct { 3903171a47aSMarc Zyngier struct its_vpe *vpe; 3913171a47aSMarc Zyngier struct its_collection *col; 3923171a47aSMarc Zyngier u16 seq_num; 3933171a47aSMarc Zyngier u16 its_list; 3943171a47aSMarc Zyngier } its_vmovp_cmd; 395d97c97baSMarc Zyngier 396d97c97baSMarc Zyngier struct { 397d97c97baSMarc Zyngier struct its_vpe *vpe; 398d97c97baSMarc Zyngier } its_invdb_cmd; 399e252cf8aSMarc Zyngier 400e252cf8aSMarc Zyngier struct { 401e252cf8aSMarc Zyngier struct its_vpe *vpe; 402e252cf8aSMarc Zyngier u8 sgi; 403e252cf8aSMarc Zyngier u8 priority; 404e252cf8aSMarc Zyngier bool enable; 405e252cf8aSMarc Zyngier bool group; 406e252cf8aSMarc Zyngier bool clear; 407e252cf8aSMarc Zyngier } its_vsgi_cmd; 408cc2d3216SMarc Zyngier }; 409cc2d3216SMarc Zyngier }; 410cc2d3216SMarc Zyngier 411cc2d3216SMarc Zyngier /* 412cc2d3216SMarc Zyngier * The ITS command block, which is what the ITS actually parses. 413cc2d3216SMarc Zyngier */ 414cc2d3216SMarc Zyngier struct its_cmd_block { 4152bbdfcc5SBen Dooks (Codethink) union { 416cc2d3216SMarc Zyngier u64 raw_cmd[4]; 4172bbdfcc5SBen Dooks (Codethink) __le64 raw_cmd_le[4]; 4182bbdfcc5SBen Dooks (Codethink) }; 419cc2d3216SMarc Zyngier }; 420cc2d3216SMarc Zyngier 421cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_SZ SZ_64K 422cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) 423cc2d3216SMarc Zyngier 42467047f90SMarc Zyngier typedef struct its_collection *(*its_cmd_builder_t)(struct its_node *, 42567047f90SMarc Zyngier struct its_cmd_block *, 426cc2d3216SMarc Zyngier struct its_cmd_desc *); 427cc2d3216SMarc Zyngier 42867047f90SMarc Zyngier typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_node *, 42967047f90SMarc Zyngier struct its_cmd_block *, 430d011e4e6SMarc Zyngier struct its_cmd_desc *); 431d011e4e6SMarc Zyngier 4324d36f136SMarc Zyngier static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) 4334d36f136SMarc Zyngier { 4344d36f136SMarc Zyngier u64 mask = GENMASK_ULL(h, l); 4354d36f136SMarc Zyngier *raw_cmd &= ~mask; 4364d36f136SMarc Zyngier *raw_cmd |= (val << l) & mask; 4374d36f136SMarc Zyngier } 4384d36f136SMarc Zyngier 439cc2d3216SMarc Zyngier static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) 440cc2d3216SMarc Zyngier { 4414d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); 442cc2d3216SMarc Zyngier } 443cc2d3216SMarc Zyngier 444cc2d3216SMarc Zyngier static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) 445cc2d3216SMarc Zyngier { 4464d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); 447cc2d3216SMarc Zyngier } 448cc2d3216SMarc Zyngier 449cc2d3216SMarc Zyngier static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) 450cc2d3216SMarc Zyngier { 4514d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); 452cc2d3216SMarc Zyngier } 453cc2d3216SMarc Zyngier 454cc2d3216SMarc Zyngier static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) 455cc2d3216SMarc Zyngier { 4564d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); 457cc2d3216SMarc Zyngier } 458cc2d3216SMarc Zyngier 459cc2d3216SMarc Zyngier static void its_encode_size(struct its_cmd_block *cmd, u8 size) 460cc2d3216SMarc Zyngier { 4614d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); 462cc2d3216SMarc Zyngier } 463cc2d3216SMarc Zyngier 464cc2d3216SMarc Zyngier static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) 465cc2d3216SMarc Zyngier { 46630ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 51, 8); 467cc2d3216SMarc Zyngier } 468cc2d3216SMarc Zyngier 469cc2d3216SMarc Zyngier static void its_encode_valid(struct its_cmd_block *cmd, int valid) 470cc2d3216SMarc Zyngier { 4714d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); 472cc2d3216SMarc Zyngier } 473cc2d3216SMarc Zyngier 474cc2d3216SMarc Zyngier static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) 475cc2d3216SMarc Zyngier { 47630ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 51, 16); 477cc2d3216SMarc Zyngier } 478cc2d3216SMarc Zyngier 479cc2d3216SMarc Zyngier static void its_encode_collection(struct its_cmd_block *cmd, u16 col) 480cc2d3216SMarc Zyngier { 4814d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); 482cc2d3216SMarc Zyngier } 483cc2d3216SMarc Zyngier 484d011e4e6SMarc Zyngier static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) 485d011e4e6SMarc Zyngier { 486d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); 487d011e4e6SMarc Zyngier } 488d011e4e6SMarc Zyngier 489d011e4e6SMarc Zyngier static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) 490d011e4e6SMarc Zyngier { 491d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); 492d011e4e6SMarc Zyngier } 493d011e4e6SMarc Zyngier 494d011e4e6SMarc Zyngier static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) 495d011e4e6SMarc Zyngier { 496d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); 497d011e4e6SMarc Zyngier } 498d011e4e6SMarc Zyngier 499d011e4e6SMarc Zyngier static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) 500d011e4e6SMarc Zyngier { 501d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); 502d011e4e6SMarc Zyngier } 503d011e4e6SMarc Zyngier 5043171a47aSMarc Zyngier static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) 5053171a47aSMarc Zyngier { 5063171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); 5073171a47aSMarc Zyngier } 5083171a47aSMarc Zyngier 5093171a47aSMarc Zyngier static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) 5103171a47aSMarc Zyngier { 5113171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); 5123171a47aSMarc Zyngier } 5133171a47aSMarc Zyngier 514eb78192bSMarc Zyngier static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) 515eb78192bSMarc Zyngier { 51630ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 51, 16); 517eb78192bSMarc Zyngier } 518eb78192bSMarc Zyngier 519eb78192bSMarc Zyngier static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) 520eb78192bSMarc Zyngier { 521eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); 522eb78192bSMarc Zyngier } 523eb78192bSMarc Zyngier 52464edfaa9SMarc Zyngier static void its_encode_vconf_addr(struct its_cmd_block *cmd, u64 vconf_pa) 52564edfaa9SMarc Zyngier { 52664edfaa9SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], vconf_pa >> 16, 51, 16); 52764edfaa9SMarc Zyngier } 52864edfaa9SMarc Zyngier 52964edfaa9SMarc Zyngier static void its_encode_alloc(struct its_cmd_block *cmd, bool alloc) 53064edfaa9SMarc Zyngier { 53164edfaa9SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], alloc, 8, 8); 53264edfaa9SMarc Zyngier } 53364edfaa9SMarc Zyngier 53464edfaa9SMarc Zyngier static void its_encode_ptz(struct its_cmd_block *cmd, bool ptz) 53564edfaa9SMarc Zyngier { 53664edfaa9SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], ptz, 9, 9); 53764edfaa9SMarc Zyngier } 53864edfaa9SMarc Zyngier 53964edfaa9SMarc Zyngier static void its_encode_vmapp_default_db(struct its_cmd_block *cmd, 54064edfaa9SMarc Zyngier u32 vpe_db_lpi) 54164edfaa9SMarc Zyngier { 54264edfaa9SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], vpe_db_lpi, 31, 0); 54364edfaa9SMarc Zyngier } 54464edfaa9SMarc Zyngier 545dd3f050aSMarc Zyngier static void its_encode_vmovp_default_db(struct its_cmd_block *cmd, 546dd3f050aSMarc Zyngier u32 vpe_db_lpi) 547dd3f050aSMarc Zyngier { 548dd3f050aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpe_db_lpi, 31, 0); 549dd3f050aSMarc Zyngier } 550dd3f050aSMarc Zyngier 551dd3f050aSMarc Zyngier static void its_encode_db(struct its_cmd_block *cmd, bool db) 552dd3f050aSMarc Zyngier { 553dd3f050aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db, 63, 63); 554dd3f050aSMarc Zyngier } 555dd3f050aSMarc Zyngier 556e252cf8aSMarc Zyngier static void its_encode_sgi_intid(struct its_cmd_block *cmd, u8 sgi) 557e252cf8aSMarc Zyngier { 558e252cf8aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], sgi, 35, 32); 559e252cf8aSMarc Zyngier } 560e252cf8aSMarc Zyngier 561e252cf8aSMarc Zyngier static void its_encode_sgi_priority(struct its_cmd_block *cmd, u8 prio) 562e252cf8aSMarc Zyngier { 563e252cf8aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], prio >> 4, 23, 20); 564e252cf8aSMarc Zyngier } 565e252cf8aSMarc Zyngier 566e252cf8aSMarc Zyngier static void its_encode_sgi_group(struct its_cmd_block *cmd, bool grp) 567e252cf8aSMarc Zyngier { 568e252cf8aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], grp, 10, 10); 569e252cf8aSMarc Zyngier } 570e252cf8aSMarc Zyngier 571e252cf8aSMarc Zyngier static void its_encode_sgi_clear(struct its_cmd_block *cmd, bool clr) 572e252cf8aSMarc Zyngier { 573e252cf8aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], clr, 9, 9); 574e252cf8aSMarc Zyngier } 575e252cf8aSMarc Zyngier 576e252cf8aSMarc Zyngier static void its_encode_sgi_enable(struct its_cmd_block *cmd, bool en) 577e252cf8aSMarc Zyngier { 578e252cf8aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], en, 8, 8); 579e252cf8aSMarc Zyngier } 580e252cf8aSMarc Zyngier 581cc2d3216SMarc Zyngier static inline void its_fixup_cmd(struct its_cmd_block *cmd) 582cc2d3216SMarc Zyngier { 583cc2d3216SMarc Zyngier /* Let's fixup BE commands */ 5842bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[0] = cpu_to_le64(cmd->raw_cmd[0]); 5852bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[1] = cpu_to_le64(cmd->raw_cmd[1]); 5862bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[2] = cpu_to_le64(cmd->raw_cmd[2]); 5872bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[3] = cpu_to_le64(cmd->raw_cmd[3]); 588cc2d3216SMarc Zyngier } 589cc2d3216SMarc Zyngier 59067047f90SMarc Zyngier static struct its_collection *its_build_mapd_cmd(struct its_node *its, 59167047f90SMarc Zyngier struct its_cmd_block *cmd, 592cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 593cc2d3216SMarc Zyngier { 594cc2d3216SMarc Zyngier unsigned long itt_addr; 595c8481267SMarc Zyngier u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); 596cc2d3216SMarc Zyngier 597cc2d3216SMarc Zyngier itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); 598cc2d3216SMarc Zyngier itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); 599cc2d3216SMarc Zyngier 600cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPD); 601cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); 602cc2d3216SMarc Zyngier its_encode_size(cmd, size - 1); 603cc2d3216SMarc Zyngier its_encode_itt(cmd, itt_addr); 604cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapd_cmd.valid); 605cc2d3216SMarc Zyngier 606cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 607cc2d3216SMarc Zyngier 608591e5becSMarc Zyngier return NULL; 609cc2d3216SMarc Zyngier } 610cc2d3216SMarc Zyngier 61167047f90SMarc Zyngier static struct its_collection *its_build_mapc_cmd(struct its_node *its, 61267047f90SMarc Zyngier struct its_cmd_block *cmd, 613cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 614cc2d3216SMarc Zyngier { 615cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPC); 616cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 617cc2d3216SMarc Zyngier its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); 618cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapc_cmd.valid); 619cc2d3216SMarc Zyngier 620cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 621cc2d3216SMarc Zyngier 622cc2d3216SMarc Zyngier return desc->its_mapc_cmd.col; 623cc2d3216SMarc Zyngier } 624cc2d3216SMarc Zyngier 62567047f90SMarc Zyngier static struct its_collection *its_build_mapti_cmd(struct its_node *its, 62667047f90SMarc Zyngier struct its_cmd_block *cmd, 627cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 628cc2d3216SMarc Zyngier { 629591e5becSMarc Zyngier struct its_collection *col; 630591e5becSMarc Zyngier 6316a25ad3aSMarc Zyngier col = dev_event_to_col(desc->its_mapti_cmd.dev, 6326a25ad3aSMarc Zyngier desc->its_mapti_cmd.event_id); 633591e5becSMarc Zyngier 6346a25ad3aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPTI); 6356a25ad3aSMarc Zyngier its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); 6366a25ad3aSMarc Zyngier its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); 6376a25ad3aSMarc Zyngier its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); 638591e5becSMarc Zyngier its_encode_collection(cmd, col->col_id); 639cc2d3216SMarc Zyngier 640cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 641cc2d3216SMarc Zyngier 64283559b47SMarc Zyngier return valid_col(col); 643cc2d3216SMarc Zyngier } 644cc2d3216SMarc Zyngier 64567047f90SMarc Zyngier static struct its_collection *its_build_movi_cmd(struct its_node *its, 64667047f90SMarc Zyngier struct its_cmd_block *cmd, 647cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 648cc2d3216SMarc Zyngier { 649591e5becSMarc Zyngier struct its_collection *col; 650591e5becSMarc Zyngier 651591e5becSMarc Zyngier col = dev_event_to_col(desc->its_movi_cmd.dev, 652591e5becSMarc Zyngier desc->its_movi_cmd.event_id); 653591e5becSMarc Zyngier 654cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MOVI); 655cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); 656591e5becSMarc Zyngier its_encode_event_id(cmd, desc->its_movi_cmd.event_id); 657cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); 658cc2d3216SMarc Zyngier 659cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 660cc2d3216SMarc Zyngier 66183559b47SMarc Zyngier return valid_col(col); 662cc2d3216SMarc Zyngier } 663cc2d3216SMarc Zyngier 66467047f90SMarc Zyngier static struct its_collection *its_build_discard_cmd(struct its_node *its, 66567047f90SMarc Zyngier struct its_cmd_block *cmd, 666cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 667cc2d3216SMarc Zyngier { 668591e5becSMarc Zyngier struct its_collection *col; 669591e5becSMarc Zyngier 670591e5becSMarc Zyngier col = dev_event_to_col(desc->its_discard_cmd.dev, 671591e5becSMarc Zyngier desc->its_discard_cmd.event_id); 672591e5becSMarc Zyngier 673cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_DISCARD); 674cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); 675cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_discard_cmd.event_id); 676cc2d3216SMarc Zyngier 677cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 678cc2d3216SMarc Zyngier 67983559b47SMarc Zyngier return valid_col(col); 680cc2d3216SMarc Zyngier } 681cc2d3216SMarc Zyngier 68267047f90SMarc Zyngier static struct its_collection *its_build_inv_cmd(struct its_node *its, 68367047f90SMarc Zyngier struct its_cmd_block *cmd, 684cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 685cc2d3216SMarc Zyngier { 686591e5becSMarc Zyngier struct its_collection *col; 687591e5becSMarc Zyngier 688591e5becSMarc Zyngier col = dev_event_to_col(desc->its_inv_cmd.dev, 689591e5becSMarc Zyngier desc->its_inv_cmd.event_id); 690591e5becSMarc Zyngier 691cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 692cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 693cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 694cc2d3216SMarc Zyngier 695cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 696cc2d3216SMarc Zyngier 69783559b47SMarc Zyngier return valid_col(col); 698cc2d3216SMarc Zyngier } 699cc2d3216SMarc Zyngier 70067047f90SMarc Zyngier static struct its_collection *its_build_int_cmd(struct its_node *its, 70167047f90SMarc Zyngier struct its_cmd_block *cmd, 7028d85dcedSMarc Zyngier struct its_cmd_desc *desc) 7038d85dcedSMarc Zyngier { 7048d85dcedSMarc Zyngier struct its_collection *col; 7058d85dcedSMarc Zyngier 7068d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_int_cmd.dev, 7078d85dcedSMarc Zyngier desc->its_int_cmd.event_id); 7088d85dcedSMarc Zyngier 7098d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 7108d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 7118d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 7128d85dcedSMarc Zyngier 7138d85dcedSMarc Zyngier its_fixup_cmd(cmd); 7148d85dcedSMarc Zyngier 71583559b47SMarc Zyngier return valid_col(col); 7168d85dcedSMarc Zyngier } 7178d85dcedSMarc Zyngier 71867047f90SMarc Zyngier static struct its_collection *its_build_clear_cmd(struct its_node *its, 71967047f90SMarc Zyngier struct its_cmd_block *cmd, 7208d85dcedSMarc Zyngier struct its_cmd_desc *desc) 7218d85dcedSMarc Zyngier { 7228d85dcedSMarc Zyngier struct its_collection *col; 7238d85dcedSMarc Zyngier 7248d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_clear_cmd.dev, 7258d85dcedSMarc Zyngier desc->its_clear_cmd.event_id); 7268d85dcedSMarc Zyngier 7278d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 7288d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 7298d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 7308d85dcedSMarc Zyngier 7318d85dcedSMarc Zyngier its_fixup_cmd(cmd); 7328d85dcedSMarc Zyngier 73383559b47SMarc Zyngier return valid_col(col); 7348d85dcedSMarc Zyngier } 7358d85dcedSMarc Zyngier 73667047f90SMarc Zyngier static struct its_collection *its_build_invall_cmd(struct its_node *its, 73767047f90SMarc Zyngier struct its_cmd_block *cmd, 738cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 739cc2d3216SMarc Zyngier { 740cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INVALL); 74110794522SZenghui Yu its_encode_collection(cmd, desc->its_invall_cmd.col->col_id); 742cc2d3216SMarc Zyngier 743cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 744cc2d3216SMarc Zyngier 745*b383a42cSWudi Wang return desc->its_invall_cmd.col; 746cc2d3216SMarc Zyngier } 747cc2d3216SMarc Zyngier 74867047f90SMarc Zyngier static struct its_vpe *its_build_vinvall_cmd(struct its_node *its, 74967047f90SMarc Zyngier struct its_cmd_block *cmd, 750eb78192bSMarc Zyngier struct its_cmd_desc *desc) 751eb78192bSMarc Zyngier { 752eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VINVALL); 753eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); 754eb78192bSMarc Zyngier 755eb78192bSMarc Zyngier its_fixup_cmd(cmd); 756eb78192bSMarc Zyngier 757205e065dSMarc Zyngier return valid_vpe(its, desc->its_vinvall_cmd.vpe); 758eb78192bSMarc Zyngier } 759eb78192bSMarc Zyngier 76067047f90SMarc Zyngier static struct its_vpe *its_build_vmapp_cmd(struct its_node *its, 76167047f90SMarc Zyngier struct its_cmd_block *cmd, 762eb78192bSMarc Zyngier struct its_cmd_desc *desc) 763eb78192bSMarc Zyngier { 76464edfaa9SMarc Zyngier unsigned long vpt_addr, vconf_addr; 7655c9a882eSMarc Zyngier u64 target; 76664edfaa9SMarc Zyngier bool alloc; 767eb78192bSMarc Zyngier 768eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPP); 769eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); 770eb78192bSMarc Zyngier its_encode_valid(cmd, desc->its_vmapp_cmd.valid); 77164edfaa9SMarc Zyngier 77264edfaa9SMarc Zyngier if (!desc->its_vmapp_cmd.valid) { 77364edfaa9SMarc Zyngier if (is_v4_1(its)) { 77464edfaa9SMarc Zyngier alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count); 77564edfaa9SMarc Zyngier its_encode_alloc(cmd, alloc); 77664edfaa9SMarc Zyngier } 77764edfaa9SMarc Zyngier 77864edfaa9SMarc Zyngier goto out; 77964edfaa9SMarc Zyngier } 78064edfaa9SMarc Zyngier 78164edfaa9SMarc Zyngier vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); 78264edfaa9SMarc Zyngier target = desc->its_vmapp_cmd.col->target_address + its->vlpi_redist_offset; 78364edfaa9SMarc Zyngier 7845c9a882eSMarc Zyngier its_encode_target(cmd, target); 785eb78192bSMarc Zyngier its_encode_vpt_addr(cmd, vpt_addr); 786eb78192bSMarc Zyngier its_encode_vpt_size(cmd, LPI_NRBITS - 1); 787eb78192bSMarc Zyngier 78864edfaa9SMarc Zyngier if (!is_v4_1(its)) 78964edfaa9SMarc Zyngier goto out; 79064edfaa9SMarc Zyngier 79164edfaa9SMarc Zyngier vconf_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->its_vm->vprop_page)); 79264edfaa9SMarc Zyngier 79364edfaa9SMarc Zyngier alloc = !atomic_fetch_inc(&desc->its_vmapp_cmd.vpe->vmapp_count); 79464edfaa9SMarc Zyngier 79564edfaa9SMarc Zyngier its_encode_alloc(cmd, alloc); 79664edfaa9SMarc Zyngier 797c21bc068SShenming Lu /* 798c21bc068SShenming Lu * GICv4.1 provides a way to get the VLPI state, which needs the vPE 799c21bc068SShenming Lu * to be unmapped first, and in this case, we may remap the vPE 800c21bc068SShenming Lu * back while the VPT is not empty. So we can't assume that the 801c21bc068SShenming Lu * VPT is empty on map. This is why we never advertise PTZ. 802c21bc068SShenming Lu */ 803c21bc068SShenming Lu its_encode_ptz(cmd, false); 80464edfaa9SMarc Zyngier its_encode_vconf_addr(cmd, vconf_addr); 80564edfaa9SMarc Zyngier its_encode_vmapp_default_db(cmd, desc->its_vmapp_cmd.vpe->vpe_db_lpi); 80664edfaa9SMarc Zyngier 80764edfaa9SMarc Zyngier out: 808eb78192bSMarc Zyngier its_fixup_cmd(cmd); 809eb78192bSMarc Zyngier 810205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmapp_cmd.vpe); 811eb78192bSMarc Zyngier } 812eb78192bSMarc Zyngier 81367047f90SMarc Zyngier static struct its_vpe *its_build_vmapti_cmd(struct its_node *its, 81467047f90SMarc Zyngier struct its_cmd_block *cmd, 815d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 816d011e4e6SMarc Zyngier { 817d011e4e6SMarc Zyngier u32 db; 818d011e4e6SMarc Zyngier 8193858d4dfSMarc Zyngier if (!is_v4_1(its) && desc->its_vmapti_cmd.db_enabled) 820d011e4e6SMarc Zyngier db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; 821d011e4e6SMarc Zyngier else 822d011e4e6SMarc Zyngier db = 1023; 823d011e4e6SMarc Zyngier 824d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPTI); 825d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); 826d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); 827d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); 828d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 829d011e4e6SMarc Zyngier its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); 830d011e4e6SMarc Zyngier 831d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 832d011e4e6SMarc Zyngier 833205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmapti_cmd.vpe); 834d011e4e6SMarc Zyngier } 835d011e4e6SMarc Zyngier 83667047f90SMarc Zyngier static struct its_vpe *its_build_vmovi_cmd(struct its_node *its, 83767047f90SMarc Zyngier struct its_cmd_block *cmd, 838d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 839d011e4e6SMarc Zyngier { 840d011e4e6SMarc Zyngier u32 db; 841d011e4e6SMarc Zyngier 8423858d4dfSMarc Zyngier if (!is_v4_1(its) && desc->its_vmovi_cmd.db_enabled) 843d011e4e6SMarc Zyngier db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; 844d011e4e6SMarc Zyngier else 845d011e4e6SMarc Zyngier db = 1023; 846d011e4e6SMarc Zyngier 847d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVI); 848d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); 849d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); 850d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); 851d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 852d011e4e6SMarc Zyngier its_encode_db_valid(cmd, true); 853d011e4e6SMarc Zyngier 854d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 855d011e4e6SMarc Zyngier 856205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmovi_cmd.vpe); 857d011e4e6SMarc Zyngier } 858d011e4e6SMarc Zyngier 85967047f90SMarc Zyngier static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, 86067047f90SMarc Zyngier struct its_cmd_block *cmd, 8613171a47aSMarc Zyngier struct its_cmd_desc *desc) 8623171a47aSMarc Zyngier { 8635c9a882eSMarc Zyngier u64 target; 8645c9a882eSMarc Zyngier 8655c9a882eSMarc Zyngier target = desc->its_vmovp_cmd.col->target_address + its->vlpi_redist_offset; 8663171a47aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVP); 8673171a47aSMarc Zyngier its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); 8683171a47aSMarc Zyngier its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); 8693171a47aSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); 8705c9a882eSMarc Zyngier its_encode_target(cmd, target); 8713171a47aSMarc Zyngier 872dd3f050aSMarc Zyngier if (is_v4_1(its)) { 873dd3f050aSMarc Zyngier its_encode_db(cmd, true); 874dd3f050aSMarc Zyngier its_encode_vmovp_default_db(cmd, desc->its_vmovp_cmd.vpe->vpe_db_lpi); 875dd3f050aSMarc Zyngier } 876dd3f050aSMarc Zyngier 8773171a47aSMarc Zyngier its_fixup_cmd(cmd); 8783171a47aSMarc Zyngier 879205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmovp_cmd.vpe); 8803171a47aSMarc Zyngier } 8813171a47aSMarc Zyngier 88228614696SMarc Zyngier static struct its_vpe *its_build_vinv_cmd(struct its_node *its, 88328614696SMarc Zyngier struct its_cmd_block *cmd, 88428614696SMarc Zyngier struct its_cmd_desc *desc) 88528614696SMarc Zyngier { 88628614696SMarc Zyngier struct its_vlpi_map *map; 88728614696SMarc Zyngier 88828614696SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_inv_cmd.dev, 88928614696SMarc Zyngier desc->its_inv_cmd.event_id); 89028614696SMarc Zyngier 89128614696SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 89228614696SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 89328614696SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 89428614696SMarc Zyngier 89528614696SMarc Zyngier its_fixup_cmd(cmd); 89628614696SMarc Zyngier 89728614696SMarc Zyngier return valid_vpe(its, map->vpe); 89828614696SMarc Zyngier } 89928614696SMarc Zyngier 900ed0e4aa9SMarc Zyngier static struct its_vpe *its_build_vint_cmd(struct its_node *its, 901ed0e4aa9SMarc Zyngier struct its_cmd_block *cmd, 902ed0e4aa9SMarc Zyngier struct its_cmd_desc *desc) 903ed0e4aa9SMarc Zyngier { 904ed0e4aa9SMarc Zyngier struct its_vlpi_map *map; 905ed0e4aa9SMarc Zyngier 906ed0e4aa9SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_int_cmd.dev, 907ed0e4aa9SMarc Zyngier desc->its_int_cmd.event_id); 908ed0e4aa9SMarc Zyngier 909ed0e4aa9SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 910ed0e4aa9SMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 911ed0e4aa9SMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 912ed0e4aa9SMarc Zyngier 913ed0e4aa9SMarc Zyngier its_fixup_cmd(cmd); 914ed0e4aa9SMarc Zyngier 915ed0e4aa9SMarc Zyngier return valid_vpe(its, map->vpe); 916ed0e4aa9SMarc Zyngier } 917ed0e4aa9SMarc Zyngier 918ed0e4aa9SMarc Zyngier static struct its_vpe *its_build_vclear_cmd(struct its_node *its, 919ed0e4aa9SMarc Zyngier struct its_cmd_block *cmd, 920ed0e4aa9SMarc Zyngier struct its_cmd_desc *desc) 921ed0e4aa9SMarc Zyngier { 922ed0e4aa9SMarc Zyngier struct its_vlpi_map *map; 923ed0e4aa9SMarc Zyngier 924ed0e4aa9SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_clear_cmd.dev, 925ed0e4aa9SMarc Zyngier desc->its_clear_cmd.event_id); 926ed0e4aa9SMarc Zyngier 927ed0e4aa9SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 928ed0e4aa9SMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 929ed0e4aa9SMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 930ed0e4aa9SMarc Zyngier 931ed0e4aa9SMarc Zyngier its_fixup_cmd(cmd); 932ed0e4aa9SMarc Zyngier 933ed0e4aa9SMarc Zyngier return valid_vpe(its, map->vpe); 934ed0e4aa9SMarc Zyngier } 935ed0e4aa9SMarc Zyngier 936d97c97baSMarc Zyngier static struct its_vpe *its_build_invdb_cmd(struct its_node *its, 937d97c97baSMarc Zyngier struct its_cmd_block *cmd, 938d97c97baSMarc Zyngier struct its_cmd_desc *desc) 939d97c97baSMarc Zyngier { 940d97c97baSMarc Zyngier if (WARN_ON(!is_v4_1(its))) 941d97c97baSMarc Zyngier return NULL; 942d97c97baSMarc Zyngier 943d97c97baSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INVDB); 944d97c97baSMarc Zyngier its_encode_vpeid(cmd, desc->its_invdb_cmd.vpe->vpe_id); 945d97c97baSMarc Zyngier 946d97c97baSMarc Zyngier its_fixup_cmd(cmd); 947d97c97baSMarc Zyngier 948d97c97baSMarc Zyngier return valid_vpe(its, desc->its_invdb_cmd.vpe); 949d97c97baSMarc Zyngier } 950d97c97baSMarc Zyngier 951e252cf8aSMarc Zyngier static struct its_vpe *its_build_vsgi_cmd(struct its_node *its, 952e252cf8aSMarc Zyngier struct its_cmd_block *cmd, 953e252cf8aSMarc Zyngier struct its_cmd_desc *desc) 954e252cf8aSMarc Zyngier { 955e252cf8aSMarc Zyngier if (WARN_ON(!is_v4_1(its))) 956e252cf8aSMarc Zyngier return NULL; 957e252cf8aSMarc Zyngier 958e252cf8aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VSGI); 959e252cf8aSMarc Zyngier its_encode_vpeid(cmd, desc->its_vsgi_cmd.vpe->vpe_id); 960e252cf8aSMarc Zyngier its_encode_sgi_intid(cmd, desc->its_vsgi_cmd.sgi); 961e252cf8aSMarc Zyngier its_encode_sgi_priority(cmd, desc->its_vsgi_cmd.priority); 962e252cf8aSMarc Zyngier its_encode_sgi_group(cmd, desc->its_vsgi_cmd.group); 963e252cf8aSMarc Zyngier its_encode_sgi_clear(cmd, desc->its_vsgi_cmd.clear); 964e252cf8aSMarc Zyngier its_encode_sgi_enable(cmd, desc->its_vsgi_cmd.enable); 965e252cf8aSMarc Zyngier 966e252cf8aSMarc Zyngier its_fixup_cmd(cmd); 967e252cf8aSMarc Zyngier 968e252cf8aSMarc Zyngier return valid_vpe(its, desc->its_vsgi_cmd.vpe); 969e252cf8aSMarc Zyngier } 970e252cf8aSMarc Zyngier 971cc2d3216SMarc Zyngier static u64 its_cmd_ptr_to_offset(struct its_node *its, 972cc2d3216SMarc Zyngier struct its_cmd_block *ptr) 973cc2d3216SMarc Zyngier { 974cc2d3216SMarc Zyngier return (ptr - its->cmd_base) * sizeof(*ptr); 975cc2d3216SMarc Zyngier } 976cc2d3216SMarc Zyngier 977cc2d3216SMarc Zyngier static int its_queue_full(struct its_node *its) 978cc2d3216SMarc Zyngier { 979cc2d3216SMarc Zyngier int widx; 980cc2d3216SMarc Zyngier int ridx; 981cc2d3216SMarc Zyngier 982cc2d3216SMarc Zyngier widx = its->cmd_write - its->cmd_base; 983cc2d3216SMarc Zyngier ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); 984cc2d3216SMarc Zyngier 985cc2d3216SMarc Zyngier /* This is incredibly unlikely to happen, unless the ITS locks up. */ 986cc2d3216SMarc Zyngier if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) 987cc2d3216SMarc Zyngier return 1; 988cc2d3216SMarc Zyngier 989cc2d3216SMarc Zyngier return 0; 990cc2d3216SMarc Zyngier } 991cc2d3216SMarc Zyngier 992cc2d3216SMarc Zyngier static struct its_cmd_block *its_allocate_entry(struct its_node *its) 993cc2d3216SMarc Zyngier { 994cc2d3216SMarc Zyngier struct its_cmd_block *cmd; 995cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 996cc2d3216SMarc Zyngier 997cc2d3216SMarc Zyngier while (its_queue_full(its)) { 998cc2d3216SMarc Zyngier count--; 999cc2d3216SMarc Zyngier if (!count) { 1000cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue not draining\n"); 1001cc2d3216SMarc Zyngier return NULL; 1002cc2d3216SMarc Zyngier } 1003cc2d3216SMarc Zyngier cpu_relax(); 1004cc2d3216SMarc Zyngier udelay(1); 1005cc2d3216SMarc Zyngier } 1006cc2d3216SMarc Zyngier 1007cc2d3216SMarc Zyngier cmd = its->cmd_write++; 1008cc2d3216SMarc Zyngier 1009cc2d3216SMarc Zyngier /* Handle queue wrapping */ 1010cc2d3216SMarc Zyngier if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) 1011cc2d3216SMarc Zyngier its->cmd_write = its->cmd_base; 1012cc2d3216SMarc Zyngier 101334d677a9SMarc Zyngier /* Clear command */ 101434d677a9SMarc Zyngier cmd->raw_cmd[0] = 0; 101534d677a9SMarc Zyngier cmd->raw_cmd[1] = 0; 101634d677a9SMarc Zyngier cmd->raw_cmd[2] = 0; 101734d677a9SMarc Zyngier cmd->raw_cmd[3] = 0; 101834d677a9SMarc Zyngier 1019cc2d3216SMarc Zyngier return cmd; 1020cc2d3216SMarc Zyngier } 1021cc2d3216SMarc Zyngier 1022cc2d3216SMarc Zyngier static struct its_cmd_block *its_post_commands(struct its_node *its) 1023cc2d3216SMarc Zyngier { 1024cc2d3216SMarc Zyngier u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); 1025cc2d3216SMarc Zyngier 1026cc2d3216SMarc Zyngier writel_relaxed(wr, its->base + GITS_CWRITER); 1027cc2d3216SMarc Zyngier 1028cc2d3216SMarc Zyngier return its->cmd_write; 1029cc2d3216SMarc Zyngier } 1030cc2d3216SMarc Zyngier 1031cc2d3216SMarc Zyngier static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) 1032cc2d3216SMarc Zyngier { 1033cc2d3216SMarc Zyngier /* 1034cc2d3216SMarc Zyngier * Make sure the commands written to memory are observable by 1035cc2d3216SMarc Zyngier * the ITS. 1036cc2d3216SMarc Zyngier */ 1037cc2d3216SMarc Zyngier if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) 1038328191c0SVladimir Murzin gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); 1039cc2d3216SMarc Zyngier else 1040cc2d3216SMarc Zyngier dsb(ishst); 1041cc2d3216SMarc Zyngier } 1042cc2d3216SMarc Zyngier 1043a19b462fSMarc Zyngier static int its_wait_for_range_completion(struct its_node *its, 1044a050fa54SHeyi Guo u64 prev_idx, 1045cc2d3216SMarc Zyngier struct its_cmd_block *to) 1046cc2d3216SMarc Zyngier { 1047a050fa54SHeyi Guo u64 rd_idx, to_idx, linear_idx; 1048cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 1049cc2d3216SMarc Zyngier 1050a050fa54SHeyi Guo /* Linearize to_idx if the command set has wrapped around */ 1051cc2d3216SMarc Zyngier to_idx = its_cmd_ptr_to_offset(its, to); 1052a050fa54SHeyi Guo if (to_idx < prev_idx) 1053a050fa54SHeyi Guo to_idx += ITS_CMD_QUEUE_SZ; 1054a050fa54SHeyi Guo 1055a050fa54SHeyi Guo linear_idx = prev_idx; 1056cc2d3216SMarc Zyngier 1057cc2d3216SMarc Zyngier while (1) { 1058a050fa54SHeyi Guo s64 delta; 1059a050fa54SHeyi Guo 1060cc2d3216SMarc Zyngier rd_idx = readl_relaxed(its->base + GITS_CREADR); 10619bdd8b1cSMarc Zyngier 1062a050fa54SHeyi Guo /* 1063a050fa54SHeyi Guo * Compute the read pointer progress, taking the 1064a050fa54SHeyi Guo * potential wrap-around into account. 1065a050fa54SHeyi Guo */ 1066a050fa54SHeyi Guo delta = rd_idx - prev_idx; 1067a050fa54SHeyi Guo if (rd_idx < prev_idx) 1068a050fa54SHeyi Guo delta += ITS_CMD_QUEUE_SZ; 10699bdd8b1cSMarc Zyngier 1070a050fa54SHeyi Guo linear_idx += delta; 1071a050fa54SHeyi Guo if (linear_idx >= to_idx) 1072cc2d3216SMarc Zyngier break; 1073cc2d3216SMarc Zyngier 1074cc2d3216SMarc Zyngier count--; 1075cc2d3216SMarc Zyngier if (!count) { 1076a050fa54SHeyi Guo pr_err_ratelimited("ITS queue timeout (%llu %llu)\n", 1077a050fa54SHeyi Guo to_idx, linear_idx); 1078a19b462fSMarc Zyngier return -1; 1079cc2d3216SMarc Zyngier } 1080a050fa54SHeyi Guo prev_idx = rd_idx; 1081cc2d3216SMarc Zyngier cpu_relax(); 1082cc2d3216SMarc Zyngier udelay(1); 1083cc2d3216SMarc Zyngier } 1084a19b462fSMarc Zyngier 1085a19b462fSMarc Zyngier return 0; 1086cc2d3216SMarc Zyngier } 1087cc2d3216SMarc Zyngier 1088e4f9094bSMarc Zyngier /* Warning, macro hell follows */ 1089e4f9094bSMarc Zyngier #define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ 1090e4f9094bSMarc Zyngier void name(struct its_node *its, \ 1091e4f9094bSMarc Zyngier buildtype builder, \ 1092e4f9094bSMarc Zyngier struct its_cmd_desc *desc) \ 1093e4f9094bSMarc Zyngier { \ 1094e4f9094bSMarc Zyngier struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ 1095e4f9094bSMarc Zyngier synctype *sync_obj; \ 1096e4f9094bSMarc Zyngier unsigned long flags; \ 1097a050fa54SHeyi Guo u64 rd_idx; \ 1098e4f9094bSMarc Zyngier \ 1099e4f9094bSMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); \ 1100e4f9094bSMarc Zyngier \ 1101e4f9094bSMarc Zyngier cmd = its_allocate_entry(its); \ 1102e4f9094bSMarc Zyngier if (!cmd) { /* We're soooooo screewed... */ \ 1103e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 1104e4f9094bSMarc Zyngier return; \ 1105e4f9094bSMarc Zyngier } \ 110667047f90SMarc Zyngier sync_obj = builder(its, cmd, desc); \ 1107e4f9094bSMarc Zyngier its_flush_cmd(its, cmd); \ 1108e4f9094bSMarc Zyngier \ 1109e4f9094bSMarc Zyngier if (sync_obj) { \ 1110e4f9094bSMarc Zyngier sync_cmd = its_allocate_entry(its); \ 1111e4f9094bSMarc Zyngier if (!sync_cmd) \ 1112e4f9094bSMarc Zyngier goto post; \ 1113e4f9094bSMarc Zyngier \ 111467047f90SMarc Zyngier buildfn(its, sync_cmd, sync_obj); \ 1115e4f9094bSMarc Zyngier its_flush_cmd(its, sync_cmd); \ 1116e4f9094bSMarc Zyngier } \ 1117e4f9094bSMarc Zyngier \ 1118e4f9094bSMarc Zyngier post: \ 1119a050fa54SHeyi Guo rd_idx = readl_relaxed(its->base + GITS_CREADR); \ 1120e4f9094bSMarc Zyngier next_cmd = its_post_commands(its); \ 1121e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 1122e4f9094bSMarc Zyngier \ 1123a050fa54SHeyi Guo if (its_wait_for_range_completion(its, rd_idx, next_cmd)) \ 1124a19b462fSMarc Zyngier pr_err_ratelimited("ITS cmd %ps failed\n", builder); \ 1125e4f9094bSMarc Zyngier } 1126e4f9094bSMarc Zyngier 112767047f90SMarc Zyngier static void its_build_sync_cmd(struct its_node *its, 112867047f90SMarc Zyngier struct its_cmd_block *sync_cmd, 1129e4f9094bSMarc Zyngier struct its_collection *sync_col) 1130cc2d3216SMarc Zyngier { 1131cc2d3216SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_SYNC); 1132cc2d3216SMarc Zyngier its_encode_target(sync_cmd, sync_col->target_address); 1133e4f9094bSMarc Zyngier 1134cc2d3216SMarc Zyngier its_fixup_cmd(sync_cmd); 1135cc2d3216SMarc Zyngier } 1136cc2d3216SMarc Zyngier 1137e4f9094bSMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, 1138e4f9094bSMarc Zyngier struct its_collection, its_build_sync_cmd) 1139cc2d3216SMarc Zyngier 114067047f90SMarc Zyngier static void its_build_vsync_cmd(struct its_node *its, 114167047f90SMarc Zyngier struct its_cmd_block *sync_cmd, 1142d011e4e6SMarc Zyngier struct its_vpe *sync_vpe) 1143d011e4e6SMarc Zyngier { 1144d011e4e6SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); 1145d011e4e6SMarc Zyngier its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); 1146d011e4e6SMarc Zyngier 1147d011e4e6SMarc Zyngier its_fixup_cmd(sync_cmd); 1148d011e4e6SMarc Zyngier } 1149d011e4e6SMarc Zyngier 1150d011e4e6SMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, 1151d011e4e6SMarc Zyngier struct its_vpe, its_build_vsync_cmd) 1152d011e4e6SMarc Zyngier 11538d85dcedSMarc Zyngier static void its_send_int(struct its_device *dev, u32 event_id) 11548d85dcedSMarc Zyngier { 11558d85dcedSMarc Zyngier struct its_cmd_desc desc; 11568d85dcedSMarc Zyngier 11578d85dcedSMarc Zyngier desc.its_int_cmd.dev = dev; 11588d85dcedSMarc Zyngier desc.its_int_cmd.event_id = event_id; 11598d85dcedSMarc Zyngier 11608d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_int_cmd, &desc); 11618d85dcedSMarc Zyngier } 11628d85dcedSMarc Zyngier 11638d85dcedSMarc Zyngier static void its_send_clear(struct its_device *dev, u32 event_id) 11648d85dcedSMarc Zyngier { 11658d85dcedSMarc Zyngier struct its_cmd_desc desc; 11668d85dcedSMarc Zyngier 11678d85dcedSMarc Zyngier desc.its_clear_cmd.dev = dev; 11688d85dcedSMarc Zyngier desc.its_clear_cmd.event_id = event_id; 11698d85dcedSMarc Zyngier 11708d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_clear_cmd, &desc); 1171cc2d3216SMarc Zyngier } 1172cc2d3216SMarc Zyngier 1173cc2d3216SMarc Zyngier static void its_send_inv(struct its_device *dev, u32 event_id) 1174cc2d3216SMarc Zyngier { 1175cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1176cc2d3216SMarc Zyngier 1177cc2d3216SMarc Zyngier desc.its_inv_cmd.dev = dev; 1178cc2d3216SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 1179cc2d3216SMarc Zyngier 1180cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_inv_cmd, &desc); 1181cc2d3216SMarc Zyngier } 1182cc2d3216SMarc Zyngier 1183cc2d3216SMarc Zyngier static void its_send_mapd(struct its_device *dev, int valid) 1184cc2d3216SMarc Zyngier { 1185cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1186cc2d3216SMarc Zyngier 1187cc2d3216SMarc Zyngier desc.its_mapd_cmd.dev = dev; 1188cc2d3216SMarc Zyngier desc.its_mapd_cmd.valid = !!valid; 1189cc2d3216SMarc Zyngier 1190cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_mapd_cmd, &desc); 1191cc2d3216SMarc Zyngier } 1192cc2d3216SMarc Zyngier 1193cc2d3216SMarc Zyngier static void its_send_mapc(struct its_node *its, struct its_collection *col, 1194cc2d3216SMarc Zyngier int valid) 1195cc2d3216SMarc Zyngier { 1196cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1197cc2d3216SMarc Zyngier 1198cc2d3216SMarc Zyngier desc.its_mapc_cmd.col = col; 1199cc2d3216SMarc Zyngier desc.its_mapc_cmd.valid = !!valid; 1200cc2d3216SMarc Zyngier 1201cc2d3216SMarc Zyngier its_send_single_command(its, its_build_mapc_cmd, &desc); 1202cc2d3216SMarc Zyngier } 1203cc2d3216SMarc Zyngier 12046a25ad3aSMarc Zyngier static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) 1205cc2d3216SMarc Zyngier { 1206cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1207cc2d3216SMarc Zyngier 12086a25ad3aSMarc Zyngier desc.its_mapti_cmd.dev = dev; 12096a25ad3aSMarc Zyngier desc.its_mapti_cmd.phys_id = irq_id; 12106a25ad3aSMarc Zyngier desc.its_mapti_cmd.event_id = id; 1211cc2d3216SMarc Zyngier 12126a25ad3aSMarc Zyngier its_send_single_command(dev->its, its_build_mapti_cmd, &desc); 1213cc2d3216SMarc Zyngier } 1214cc2d3216SMarc Zyngier 1215cc2d3216SMarc Zyngier static void its_send_movi(struct its_device *dev, 1216cc2d3216SMarc Zyngier struct its_collection *col, u32 id) 1217cc2d3216SMarc Zyngier { 1218cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1219cc2d3216SMarc Zyngier 1220cc2d3216SMarc Zyngier desc.its_movi_cmd.dev = dev; 1221cc2d3216SMarc Zyngier desc.its_movi_cmd.col = col; 1222591e5becSMarc Zyngier desc.its_movi_cmd.event_id = id; 1223cc2d3216SMarc Zyngier 1224cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_movi_cmd, &desc); 1225cc2d3216SMarc Zyngier } 1226cc2d3216SMarc Zyngier 1227cc2d3216SMarc Zyngier static void its_send_discard(struct its_device *dev, u32 id) 1228cc2d3216SMarc Zyngier { 1229cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1230cc2d3216SMarc Zyngier 1231cc2d3216SMarc Zyngier desc.its_discard_cmd.dev = dev; 1232cc2d3216SMarc Zyngier desc.its_discard_cmd.event_id = id; 1233cc2d3216SMarc Zyngier 1234cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_discard_cmd, &desc); 1235cc2d3216SMarc Zyngier } 1236cc2d3216SMarc Zyngier 1237cc2d3216SMarc Zyngier static void its_send_invall(struct its_node *its, struct its_collection *col) 1238cc2d3216SMarc Zyngier { 1239cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1240cc2d3216SMarc Zyngier 1241cc2d3216SMarc Zyngier desc.its_invall_cmd.col = col; 1242cc2d3216SMarc Zyngier 1243cc2d3216SMarc Zyngier its_send_single_command(its, its_build_invall_cmd, &desc); 1244cc2d3216SMarc Zyngier } 1245c48ed51cSMarc Zyngier 1246d011e4e6SMarc Zyngier static void its_send_vmapti(struct its_device *dev, u32 id) 1247d011e4e6SMarc Zyngier { 1248c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); 1249d011e4e6SMarc Zyngier struct its_cmd_desc desc; 1250d011e4e6SMarc Zyngier 1251d011e4e6SMarc Zyngier desc.its_vmapti_cmd.vpe = map->vpe; 1252d011e4e6SMarc Zyngier desc.its_vmapti_cmd.dev = dev; 1253d011e4e6SMarc Zyngier desc.its_vmapti_cmd.virt_id = map->vintid; 1254d011e4e6SMarc Zyngier desc.its_vmapti_cmd.event_id = id; 1255d011e4e6SMarc Zyngier desc.its_vmapti_cmd.db_enabled = map->db_enabled; 1256d011e4e6SMarc Zyngier 1257d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); 1258d011e4e6SMarc Zyngier } 1259d011e4e6SMarc Zyngier 1260d011e4e6SMarc Zyngier static void its_send_vmovi(struct its_device *dev, u32 id) 1261d011e4e6SMarc Zyngier { 1262c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); 1263d011e4e6SMarc Zyngier struct its_cmd_desc desc; 1264d011e4e6SMarc Zyngier 1265d011e4e6SMarc Zyngier desc.its_vmovi_cmd.vpe = map->vpe; 1266d011e4e6SMarc Zyngier desc.its_vmovi_cmd.dev = dev; 1267d011e4e6SMarc Zyngier desc.its_vmovi_cmd.event_id = id; 1268d011e4e6SMarc Zyngier desc.its_vmovi_cmd.db_enabled = map->db_enabled; 1269d011e4e6SMarc Zyngier 1270d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); 1271d011e4e6SMarc Zyngier } 1272d011e4e6SMarc Zyngier 127375fd951bSMarc Zyngier static void its_send_vmapp(struct its_node *its, 127475fd951bSMarc Zyngier struct its_vpe *vpe, bool valid) 1275eb78192bSMarc Zyngier { 1276eb78192bSMarc Zyngier struct its_cmd_desc desc; 1277eb78192bSMarc Zyngier 1278eb78192bSMarc Zyngier desc.its_vmapp_cmd.vpe = vpe; 1279eb78192bSMarc Zyngier desc.its_vmapp_cmd.valid = valid; 1280eb78192bSMarc Zyngier desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; 128175fd951bSMarc Zyngier 1282eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); 1283eb78192bSMarc Zyngier } 1284eb78192bSMarc Zyngier 12853171a47aSMarc Zyngier static void its_send_vmovp(struct its_vpe *vpe) 12863171a47aSMarc Zyngier { 128784243125SZenghui Yu struct its_cmd_desc desc = {}; 12883171a47aSMarc Zyngier struct its_node *its; 12893171a47aSMarc Zyngier unsigned long flags; 12903171a47aSMarc Zyngier int col_id = vpe->col_idx; 12913171a47aSMarc Zyngier 12923171a47aSMarc Zyngier desc.its_vmovp_cmd.vpe = vpe; 12933171a47aSMarc Zyngier 12943171a47aSMarc Zyngier if (!its_list_map) { 12953171a47aSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 12963171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 12973171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 12983171a47aSMarc Zyngier return; 12993171a47aSMarc Zyngier } 13003171a47aSMarc Zyngier 13013171a47aSMarc Zyngier /* 13023171a47aSMarc Zyngier * Yet another marvel of the architecture. If using the 13033171a47aSMarc Zyngier * its_list "feature", we need to make sure that all ITSs 13043171a47aSMarc Zyngier * receive all VMOVP commands in the same order. The only way 13053171a47aSMarc Zyngier * to guarantee this is to make vmovp a serialization point. 13063171a47aSMarc Zyngier * 13073171a47aSMarc Zyngier * Wall <-- Head. 13083171a47aSMarc Zyngier */ 13093171a47aSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 13103171a47aSMarc Zyngier 13113171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; 131284243125SZenghui Yu desc.its_vmovp_cmd.its_list = get_its_list(vpe->its_vm); 13133171a47aSMarc Zyngier 13143171a47aSMarc Zyngier /* Emit VMOVPs */ 13153171a47aSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 13160dd57fedSMarc Zyngier if (!is_v4(its)) 13173171a47aSMarc Zyngier continue; 13183171a47aSMarc Zyngier 1319009384b3SMarc Zyngier if (!require_its_list_vmovp(vpe->its_vm, its)) 13202247e1bfSMarc Zyngier continue; 13212247e1bfSMarc Zyngier 13223171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 13233171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 13243171a47aSMarc Zyngier } 13253171a47aSMarc Zyngier 13263171a47aSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 13273171a47aSMarc Zyngier } 13283171a47aSMarc Zyngier 132940619a2eSMarc Zyngier static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe) 1330eb78192bSMarc Zyngier { 1331eb78192bSMarc Zyngier struct its_cmd_desc desc; 1332eb78192bSMarc Zyngier 1333eb78192bSMarc Zyngier desc.its_vinvall_cmd.vpe = vpe; 1334eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); 1335eb78192bSMarc Zyngier } 1336eb78192bSMarc Zyngier 133728614696SMarc Zyngier static void its_send_vinv(struct its_device *dev, u32 event_id) 133828614696SMarc Zyngier { 133928614696SMarc Zyngier struct its_cmd_desc desc; 134028614696SMarc Zyngier 134128614696SMarc Zyngier /* 134228614696SMarc Zyngier * There is no real VINV command. This is just a normal INV, 134328614696SMarc Zyngier * with a VSYNC instead of a SYNC. 134428614696SMarc Zyngier */ 134528614696SMarc Zyngier desc.its_inv_cmd.dev = dev; 134628614696SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 134728614696SMarc Zyngier 134828614696SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vinv_cmd, &desc); 134928614696SMarc Zyngier } 135028614696SMarc Zyngier 1351ed0e4aa9SMarc Zyngier static void its_send_vint(struct its_device *dev, u32 event_id) 1352ed0e4aa9SMarc Zyngier { 1353ed0e4aa9SMarc Zyngier struct its_cmd_desc desc; 1354ed0e4aa9SMarc Zyngier 1355ed0e4aa9SMarc Zyngier /* 1356ed0e4aa9SMarc Zyngier * There is no real VINT command. This is just a normal INT, 1357ed0e4aa9SMarc Zyngier * with a VSYNC instead of a SYNC. 1358ed0e4aa9SMarc Zyngier */ 1359ed0e4aa9SMarc Zyngier desc.its_int_cmd.dev = dev; 1360ed0e4aa9SMarc Zyngier desc.its_int_cmd.event_id = event_id; 1361ed0e4aa9SMarc Zyngier 1362ed0e4aa9SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vint_cmd, &desc); 1363ed0e4aa9SMarc Zyngier } 1364ed0e4aa9SMarc Zyngier 1365ed0e4aa9SMarc Zyngier static void its_send_vclear(struct its_device *dev, u32 event_id) 1366ed0e4aa9SMarc Zyngier { 1367ed0e4aa9SMarc Zyngier struct its_cmd_desc desc; 1368ed0e4aa9SMarc Zyngier 1369ed0e4aa9SMarc Zyngier /* 1370ed0e4aa9SMarc Zyngier * There is no real VCLEAR command. This is just a normal CLEAR, 1371ed0e4aa9SMarc Zyngier * with a VSYNC instead of a SYNC. 1372ed0e4aa9SMarc Zyngier */ 1373ed0e4aa9SMarc Zyngier desc.its_clear_cmd.dev = dev; 1374ed0e4aa9SMarc Zyngier desc.its_clear_cmd.event_id = event_id; 1375ed0e4aa9SMarc Zyngier 1376ed0e4aa9SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vclear_cmd, &desc); 1377ed0e4aa9SMarc Zyngier } 1378ed0e4aa9SMarc Zyngier 1379d97c97baSMarc Zyngier static void its_send_invdb(struct its_node *its, struct its_vpe *vpe) 1380d97c97baSMarc Zyngier { 1381d97c97baSMarc Zyngier struct its_cmd_desc desc; 1382d97c97baSMarc Zyngier 1383d97c97baSMarc Zyngier desc.its_invdb_cmd.vpe = vpe; 1384d97c97baSMarc Zyngier its_send_single_vcommand(its, its_build_invdb_cmd, &desc); 1385d97c97baSMarc Zyngier } 1386d97c97baSMarc Zyngier 1387c48ed51cSMarc Zyngier /* 1388c48ed51cSMarc Zyngier * irqchip functions - assumes MSI, mostly. 1389c48ed51cSMarc Zyngier */ 1390015ec038SMarc Zyngier static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) 1391c48ed51cSMarc Zyngier { 1392c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 1393015ec038SMarc Zyngier irq_hw_number_t hwirq; 1394e1a2e201SMarc Zyngier void *va; 1395adcdb94eSMarc Zyngier u8 *cfg; 1396c48ed51cSMarc Zyngier 1397c1d4d5cdSMarc Zyngier if (map) { 1398c1d4d5cdSMarc Zyngier va = page_address(map->vm->vprop_page); 1399d4d7b4adSMarc Zyngier hwirq = map->vintid; 1400d4d7b4adSMarc Zyngier 1401d4d7b4adSMarc Zyngier /* Remember the updated property */ 1402d4d7b4adSMarc Zyngier map->properties &= ~clr; 1403d4d7b4adSMarc Zyngier map->properties |= set | LPI_PROP_GROUP1; 1404015ec038SMarc Zyngier } else { 1405e1a2e201SMarc Zyngier va = gic_rdists->prop_table_va; 1406015ec038SMarc Zyngier hwirq = d->hwirq; 1407015ec038SMarc Zyngier } 1408adcdb94eSMarc Zyngier 1409e1a2e201SMarc Zyngier cfg = va + hwirq - 8192; 1410adcdb94eSMarc Zyngier *cfg &= ~clr; 1411015ec038SMarc Zyngier *cfg |= set | LPI_PROP_GROUP1; 1412c48ed51cSMarc Zyngier 1413c48ed51cSMarc Zyngier /* 1414c48ed51cSMarc Zyngier * Make the above write visible to the redistributors. 1415c48ed51cSMarc Zyngier * And yes, we're flushing exactly: One. Single. Byte. 1416c48ed51cSMarc Zyngier * Humpf... 1417c48ed51cSMarc Zyngier */ 1418c48ed51cSMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) 1419328191c0SVladimir Murzin gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); 1420c48ed51cSMarc Zyngier else 1421c48ed51cSMarc Zyngier dsb(ishst); 1422015ec038SMarc Zyngier } 1423015ec038SMarc Zyngier 14242f4f064bSMarc Zyngier static void wait_for_syncr(void __iomem *rdbase) 14252f4f064bSMarc Zyngier { 142604d80dbeSHeyi Guo while (readl_relaxed(rdbase + GICR_SYNCR) & 1) 14272f4f064bSMarc Zyngier cpu_relax(); 14282f4f064bSMarc Zyngier } 14292f4f064bSMarc Zyngier 1430425c09beSMarc Zyngier static void direct_lpi_inv(struct irq_data *d) 1431425c09beSMarc Zyngier { 1432f4a81f5aSMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 1433425c09beSMarc Zyngier void __iomem *rdbase; 1434f3a05921SMarc Zyngier unsigned long flags; 1435f4a81f5aSMarc Zyngier u64 val; 1436f3a05921SMarc Zyngier int cpu; 1437f4a81f5aSMarc Zyngier 1438f4a81f5aSMarc Zyngier if (map) { 1439f4a81f5aSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1440f4a81f5aSMarc Zyngier 1441f4a81f5aSMarc Zyngier WARN_ON(!is_v4_1(its_dev->its)); 1442f4a81f5aSMarc Zyngier 1443f4a81f5aSMarc Zyngier val = GICR_INVLPIR_V; 1444f4a81f5aSMarc Zyngier val |= FIELD_PREP(GICR_INVLPIR_VPEID, map->vpe->vpe_id); 1445f4a81f5aSMarc Zyngier val |= FIELD_PREP(GICR_INVLPIR_INTID, map->vintid); 1446f4a81f5aSMarc Zyngier } else { 1447f4a81f5aSMarc Zyngier val = d->hwirq; 1448f4a81f5aSMarc Zyngier } 1449425c09beSMarc Zyngier 1450425c09beSMarc Zyngier /* Target the redistributor this LPI is currently routed to */ 1451f3a05921SMarc Zyngier cpu = irq_to_cpuid_lock(d, &flags); 14529058a4e9SMarc Zyngier raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); 1453f3a05921SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, cpu)->rd_base; 1454f4a81f5aSMarc Zyngier gic_write_lpir(val, rdbase + GICR_INVLPIR); 1455425c09beSMarc Zyngier 1456425c09beSMarc Zyngier wait_for_syncr(rdbase); 14579058a4e9SMarc Zyngier raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); 1458f3a05921SMarc Zyngier irq_to_cpuid_unlock(d, flags); 1459425c09beSMarc Zyngier } 1460425c09beSMarc Zyngier 1461015ec038SMarc Zyngier static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) 1462015ec038SMarc Zyngier { 1463015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1464015ec038SMarc Zyngier 1465015ec038SMarc Zyngier lpi_write_config(d, clr, set); 1466f4a81f5aSMarc Zyngier if (gic_rdists->has_direct_lpi && 1467f4a81f5aSMarc Zyngier (is_v4_1(its_dev->its) || !irqd_is_forwarded_to_vcpu(d))) 1468425c09beSMarc Zyngier direct_lpi_inv(d); 146928614696SMarc Zyngier else if (!irqd_is_forwarded_to_vcpu(d)) 1470adcdb94eSMarc Zyngier its_send_inv(its_dev, its_get_event_id(d)); 147128614696SMarc Zyngier else 147228614696SMarc Zyngier its_send_vinv(its_dev, its_get_event_id(d)); 1473c48ed51cSMarc Zyngier } 1474c48ed51cSMarc Zyngier 1475015ec038SMarc Zyngier static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) 1476015ec038SMarc Zyngier { 1477015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1478015ec038SMarc Zyngier u32 event = its_get_event_id(d); 1479c1d4d5cdSMarc Zyngier struct its_vlpi_map *map; 1480015ec038SMarc Zyngier 14813858d4dfSMarc Zyngier /* 14823858d4dfSMarc Zyngier * GICv4.1 does away with the per-LPI nonsense, nothing to do 14833858d4dfSMarc Zyngier * here. 14843858d4dfSMarc Zyngier */ 14853858d4dfSMarc Zyngier if (is_v4_1(its_dev->its)) 14863858d4dfSMarc Zyngier return; 14873858d4dfSMarc Zyngier 1488c1d4d5cdSMarc Zyngier map = dev_event_to_vlpi_map(its_dev, event); 1489c1d4d5cdSMarc Zyngier 1490c1d4d5cdSMarc Zyngier if (map->db_enabled == enable) 1491015ec038SMarc Zyngier return; 1492015ec038SMarc Zyngier 1493c1d4d5cdSMarc Zyngier map->db_enabled = enable; 1494015ec038SMarc Zyngier 1495015ec038SMarc Zyngier /* 1496015ec038SMarc Zyngier * More fun with the architecture: 1497015ec038SMarc Zyngier * 1498015ec038SMarc Zyngier * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI 1499015ec038SMarc Zyngier * value or to 1023, depending on the enable bit. But that 1500a359f757SIngo Molnar * would be issuing a mapping for an /existing/ DevID+EventID 1501015ec038SMarc Zyngier * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI 1502015ec038SMarc Zyngier * to the /same/ vPE, using this opportunity to adjust the 1503015ec038SMarc Zyngier * doorbell. Mouahahahaha. We loves it, Precious. 1504015ec038SMarc Zyngier */ 1505015ec038SMarc Zyngier its_send_vmovi(its_dev, event); 1506c48ed51cSMarc Zyngier } 1507c48ed51cSMarc Zyngier 1508c48ed51cSMarc Zyngier static void its_mask_irq(struct irq_data *d) 1509c48ed51cSMarc Zyngier { 1510015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1511015ec038SMarc Zyngier its_vlpi_set_doorbell(d, false); 1512015ec038SMarc Zyngier 1513adcdb94eSMarc Zyngier lpi_update_config(d, LPI_PROP_ENABLED, 0); 1514c48ed51cSMarc Zyngier } 1515c48ed51cSMarc Zyngier 1516c48ed51cSMarc Zyngier static void its_unmask_irq(struct irq_data *d) 1517c48ed51cSMarc Zyngier { 1518015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1519015ec038SMarc Zyngier its_vlpi_set_doorbell(d, true); 1520015ec038SMarc Zyngier 1521adcdb94eSMarc Zyngier lpi_update_config(d, 0, LPI_PROP_ENABLED); 1522c48ed51cSMarc Zyngier } 1523c48ed51cSMarc Zyngier 15242f13ff1dSMarc Zyngier static __maybe_unused u32 its_read_lpi_count(struct irq_data *d, int cpu) 15252f13ff1dSMarc Zyngier { 15262f13ff1dSMarc Zyngier if (irqd_affinity_is_managed(d)) 15272f13ff1dSMarc Zyngier return atomic_read(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); 15282f13ff1dSMarc Zyngier 15292f13ff1dSMarc Zyngier return atomic_read(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); 15302f13ff1dSMarc Zyngier } 15312f13ff1dSMarc Zyngier 15322f13ff1dSMarc Zyngier static void its_inc_lpi_count(struct irq_data *d, int cpu) 15332f13ff1dSMarc Zyngier { 15342f13ff1dSMarc Zyngier if (irqd_affinity_is_managed(d)) 15352f13ff1dSMarc Zyngier atomic_inc(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); 15362f13ff1dSMarc Zyngier else 15372f13ff1dSMarc Zyngier atomic_inc(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); 15382f13ff1dSMarc Zyngier } 15392f13ff1dSMarc Zyngier 15402f13ff1dSMarc Zyngier static void its_dec_lpi_count(struct irq_data *d, int cpu) 15412f13ff1dSMarc Zyngier { 15422f13ff1dSMarc Zyngier if (irqd_affinity_is_managed(d)) 15432f13ff1dSMarc Zyngier atomic_dec(&per_cpu_ptr(&cpu_lpi_count, cpu)->managed); 15442f13ff1dSMarc Zyngier else 15452f13ff1dSMarc Zyngier atomic_dec(&per_cpu_ptr(&cpu_lpi_count, cpu)->unmanaged); 15462f13ff1dSMarc Zyngier } 15472f13ff1dSMarc Zyngier 1548c5d6082dSMarc Zyngier static unsigned int cpumask_pick_least_loaded(struct irq_data *d, 1549c5d6082dSMarc Zyngier const struct cpumask *cpu_mask) 1550c5d6082dSMarc Zyngier { 1551c5d6082dSMarc Zyngier unsigned int cpu = nr_cpu_ids, tmp; 1552c5d6082dSMarc Zyngier int count = S32_MAX; 1553c5d6082dSMarc Zyngier 1554c5d6082dSMarc Zyngier for_each_cpu(tmp, cpu_mask) { 1555c5d6082dSMarc Zyngier int this_count = its_read_lpi_count(d, tmp); 1556c5d6082dSMarc Zyngier if (this_count < count) { 1557c5d6082dSMarc Zyngier cpu = tmp; 1558c5d6082dSMarc Zyngier count = this_count; 1559c5d6082dSMarc Zyngier } 1560c5d6082dSMarc Zyngier } 1561c5d6082dSMarc Zyngier 1562c5d6082dSMarc Zyngier return cpu; 1563c5d6082dSMarc Zyngier } 1564c5d6082dSMarc Zyngier 1565c5d6082dSMarc Zyngier /* 1566c5d6082dSMarc Zyngier * As suggested by Thomas Gleixner in: 1567c5d6082dSMarc Zyngier * https://lore.kernel.org/r/87h80q2aoc.fsf@nanos.tec.linutronix.de 1568c5d6082dSMarc Zyngier */ 1569c5d6082dSMarc Zyngier static int its_select_cpu(struct irq_data *d, 1570c5d6082dSMarc Zyngier const struct cpumask *aff_mask) 1571c5d6082dSMarc Zyngier { 1572c5d6082dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1573c5d6082dSMarc Zyngier cpumask_var_t tmpmask; 1574c5d6082dSMarc Zyngier int cpu, node; 1575c5d6082dSMarc Zyngier 1576c5d6082dSMarc Zyngier if (!alloc_cpumask_var(&tmpmask, GFP_ATOMIC)) 1577c5d6082dSMarc Zyngier return -ENOMEM; 1578c5d6082dSMarc Zyngier 1579c5d6082dSMarc Zyngier node = its_dev->its->numa_node; 1580c5d6082dSMarc Zyngier 1581c5d6082dSMarc Zyngier if (!irqd_affinity_is_managed(d)) { 1582c5d6082dSMarc Zyngier /* First try the NUMA node */ 1583c5d6082dSMarc Zyngier if (node != NUMA_NO_NODE) { 1584c5d6082dSMarc Zyngier /* 1585c5d6082dSMarc Zyngier * Try the intersection of the affinity mask and the 1586c5d6082dSMarc Zyngier * node mask (and the online mask, just to be safe). 1587c5d6082dSMarc Zyngier */ 1588c5d6082dSMarc Zyngier cpumask_and(tmpmask, cpumask_of_node(node), aff_mask); 1589c5d6082dSMarc Zyngier cpumask_and(tmpmask, tmpmask, cpu_online_mask); 1590c5d6082dSMarc Zyngier 1591c5d6082dSMarc Zyngier /* 1592c5d6082dSMarc Zyngier * Ideally, we would check if the mask is empty, and 1593c5d6082dSMarc Zyngier * try again on the full node here. 1594c5d6082dSMarc Zyngier * 1595c5d6082dSMarc Zyngier * But it turns out that the way ACPI describes the 1596c5d6082dSMarc Zyngier * affinity for ITSs only deals about memory, and 1597c5d6082dSMarc Zyngier * not target CPUs, so it cannot describe a single 1598c5d6082dSMarc Zyngier * ITS placed next to two NUMA nodes. 1599c5d6082dSMarc Zyngier * 1600c5d6082dSMarc Zyngier * Instead, just fallback on the online mask. This 1601c5d6082dSMarc Zyngier * diverges from Thomas' suggestion above. 1602c5d6082dSMarc Zyngier */ 1603c5d6082dSMarc Zyngier cpu = cpumask_pick_least_loaded(d, tmpmask); 1604c5d6082dSMarc Zyngier if (cpu < nr_cpu_ids) 1605c5d6082dSMarc Zyngier goto out; 1606c5d6082dSMarc Zyngier 1607c5d6082dSMarc Zyngier /* If we can't cross sockets, give up */ 1608c5d6082dSMarc Zyngier if ((its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144)) 1609c5d6082dSMarc Zyngier goto out; 1610c5d6082dSMarc Zyngier 1611c5d6082dSMarc Zyngier /* If the above failed, expand the search */ 1612c5d6082dSMarc Zyngier } 1613c5d6082dSMarc Zyngier 1614c5d6082dSMarc Zyngier /* Try the intersection of the affinity and online masks */ 1615c5d6082dSMarc Zyngier cpumask_and(tmpmask, aff_mask, cpu_online_mask); 1616c5d6082dSMarc Zyngier 1617c5d6082dSMarc Zyngier /* If that doesn't fly, the online mask is the last resort */ 1618c5d6082dSMarc Zyngier if (cpumask_empty(tmpmask)) 1619c5d6082dSMarc Zyngier cpumask_copy(tmpmask, cpu_online_mask); 1620c5d6082dSMarc Zyngier 1621c5d6082dSMarc Zyngier cpu = cpumask_pick_least_loaded(d, tmpmask); 1622c5d6082dSMarc Zyngier } else { 1623c5d6082dSMarc Zyngier cpumask_and(tmpmask, irq_data_get_affinity_mask(d), cpu_online_mask); 1624c5d6082dSMarc Zyngier 1625c5d6082dSMarc Zyngier /* If we cannot cross sockets, limit the search to that node */ 1626c5d6082dSMarc Zyngier if ((its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) && 1627c5d6082dSMarc Zyngier node != NUMA_NO_NODE) 1628c5d6082dSMarc Zyngier cpumask_and(tmpmask, tmpmask, cpumask_of_node(node)); 1629c5d6082dSMarc Zyngier 1630c5d6082dSMarc Zyngier cpu = cpumask_pick_least_loaded(d, tmpmask); 1631c5d6082dSMarc Zyngier } 1632c5d6082dSMarc Zyngier out: 1633c5d6082dSMarc Zyngier free_cpumask_var(tmpmask); 1634c5d6082dSMarc Zyngier 1635c5d6082dSMarc Zyngier pr_debug("IRQ%d -> %*pbl CPU%d\n", d->irq, cpumask_pr_args(aff_mask), cpu); 1636c5d6082dSMarc Zyngier return cpu; 1637c5d6082dSMarc Zyngier } 1638c5d6082dSMarc Zyngier 1639c48ed51cSMarc Zyngier static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, 1640c48ed51cSMarc Zyngier bool force) 1641c48ed51cSMarc Zyngier { 1642c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1643c48ed51cSMarc Zyngier struct its_collection *target_col; 1644c48ed51cSMarc Zyngier u32 id = its_get_event_id(d); 1645c5d6082dSMarc Zyngier int cpu, prev_cpu; 1646c48ed51cSMarc Zyngier 1647015ec038SMarc Zyngier /* A forwarded interrupt should use irq_set_vcpu_affinity */ 1648015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1649015ec038SMarc Zyngier return -EINVAL; 1650015ec038SMarc Zyngier 16512f13ff1dSMarc Zyngier prev_cpu = its_dev->event_map.col_map[id]; 16522f13ff1dSMarc Zyngier its_dec_lpi_count(d, prev_cpu); 16532f13ff1dSMarc Zyngier 1654c5d6082dSMarc Zyngier if (!force) 1655c5d6082dSMarc Zyngier cpu = its_select_cpu(d, mask_val); 1656c5d6082dSMarc Zyngier else 1657c5d6082dSMarc Zyngier cpu = cpumask_pick_least_loaded(d, mask_val); 1658fbf8f40eSGanapatrao Kulkarni 1659c5d6082dSMarc Zyngier if (cpu < 0 || cpu >= nr_cpu_ids) 16602f13ff1dSMarc Zyngier goto err; 1661c48ed51cSMarc Zyngier 16628b8d94a7SMaJun /* don't set the affinity when the target cpu is same as current one */ 16632f13ff1dSMarc Zyngier if (cpu != prev_cpu) { 1664c48ed51cSMarc Zyngier target_col = &its_dev->its->collections[cpu]; 1665c48ed51cSMarc Zyngier its_send_movi(its_dev, target_col, id); 1666591e5becSMarc Zyngier its_dev->event_map.col_map[id] = cpu; 16670d224d35SMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 16688b8d94a7SMaJun } 1669c48ed51cSMarc Zyngier 16702f13ff1dSMarc Zyngier its_inc_lpi_count(d, cpu); 16712f13ff1dSMarc Zyngier 1672c48ed51cSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 16732f13ff1dSMarc Zyngier 16742f13ff1dSMarc Zyngier err: 16752f13ff1dSMarc Zyngier its_inc_lpi_count(d, prev_cpu); 16762f13ff1dSMarc Zyngier return -EINVAL; 1677c48ed51cSMarc Zyngier } 1678c48ed51cSMarc Zyngier 1679558b0165SArd Biesheuvel static u64 its_irq_get_msi_base(struct its_device *its_dev) 1680558b0165SArd Biesheuvel { 1681558b0165SArd Biesheuvel struct its_node *its = its_dev->its; 1682558b0165SArd Biesheuvel 1683558b0165SArd Biesheuvel return its->phys_base + GITS_TRANSLATER; 1684558b0165SArd Biesheuvel } 1685558b0165SArd Biesheuvel 1686b48ac83dSMarc Zyngier static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) 1687b48ac83dSMarc Zyngier { 1688b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1689b48ac83dSMarc Zyngier struct its_node *its; 1690b48ac83dSMarc Zyngier u64 addr; 1691b48ac83dSMarc Zyngier 1692b48ac83dSMarc Zyngier its = its_dev->its; 1693558b0165SArd Biesheuvel addr = its->get_msi_base(its_dev); 1694b48ac83dSMarc Zyngier 1695b11283ebSVladimir Murzin msg->address_lo = lower_32_bits(addr); 1696b11283ebSVladimir Murzin msg->address_hi = upper_32_bits(addr); 1697b48ac83dSMarc Zyngier msg->data = its_get_event_id(d); 169844bb7e24SRobin Murphy 169935ae7df2SJulien Grall iommu_dma_compose_msi_msg(irq_data_get_msi_desc(d), msg); 1700b48ac83dSMarc Zyngier } 1701b48ac83dSMarc Zyngier 17028d85dcedSMarc Zyngier static int its_irq_set_irqchip_state(struct irq_data *d, 17038d85dcedSMarc Zyngier enum irqchip_irq_state which, 17048d85dcedSMarc Zyngier bool state) 17058d85dcedSMarc Zyngier { 17068d85dcedSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 17078d85dcedSMarc Zyngier u32 event = its_get_event_id(d); 17088d85dcedSMarc Zyngier 17098d85dcedSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 17108d85dcedSMarc Zyngier return -EINVAL; 17118d85dcedSMarc Zyngier 1712ed0e4aa9SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1713ed0e4aa9SMarc Zyngier if (state) 1714ed0e4aa9SMarc Zyngier its_send_vint(its_dev, event); 1715ed0e4aa9SMarc Zyngier else 1716ed0e4aa9SMarc Zyngier its_send_vclear(its_dev, event); 1717ed0e4aa9SMarc Zyngier } else { 17188d85dcedSMarc Zyngier if (state) 17198d85dcedSMarc Zyngier its_send_int(its_dev, event); 17208d85dcedSMarc Zyngier else 17218d85dcedSMarc Zyngier its_send_clear(its_dev, event); 1722ed0e4aa9SMarc Zyngier } 17238d85dcedSMarc Zyngier 17248d85dcedSMarc Zyngier return 0; 17258d85dcedSMarc Zyngier } 17268d85dcedSMarc Zyngier 17275f774f5eSMarc Zyngier static int its_irq_retrigger(struct irq_data *d) 17285f774f5eSMarc Zyngier { 17295f774f5eSMarc Zyngier return !its_irq_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); 17305f774f5eSMarc Zyngier } 17315f774f5eSMarc Zyngier 1732009384b3SMarc Zyngier /* 1733009384b3SMarc Zyngier * Two favourable cases: 1734009384b3SMarc Zyngier * 1735009384b3SMarc Zyngier * (a) Either we have a GICv4.1, and all vPEs have to be mapped at all times 1736009384b3SMarc Zyngier * for vSGI delivery 1737009384b3SMarc Zyngier * 1738009384b3SMarc Zyngier * (b) Or the ITSs do not use a list map, meaning that VMOVP is cheap enough 1739009384b3SMarc Zyngier * and we're better off mapping all VPEs always 1740009384b3SMarc Zyngier * 1741009384b3SMarc Zyngier * If neither (a) nor (b) is true, then we map vPEs on demand. 1742009384b3SMarc Zyngier * 1743009384b3SMarc Zyngier */ 1744009384b3SMarc Zyngier static bool gic_requires_eager_mapping(void) 1745009384b3SMarc Zyngier { 1746009384b3SMarc Zyngier if (!its_list_map || gic_rdists->has_rvpeid) 1747009384b3SMarc Zyngier return true; 1748009384b3SMarc Zyngier 1749009384b3SMarc Zyngier return false; 1750009384b3SMarc Zyngier } 1751009384b3SMarc Zyngier 17522247e1bfSMarc Zyngier static void its_map_vm(struct its_node *its, struct its_vm *vm) 17532247e1bfSMarc Zyngier { 17542247e1bfSMarc Zyngier unsigned long flags; 17552247e1bfSMarc Zyngier 1756009384b3SMarc Zyngier if (gic_requires_eager_mapping()) 17572247e1bfSMarc Zyngier return; 17582247e1bfSMarc Zyngier 17592247e1bfSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 17602247e1bfSMarc Zyngier 17612247e1bfSMarc Zyngier /* 17622247e1bfSMarc Zyngier * If the VM wasn't mapped yet, iterate over the vpes and get 17632247e1bfSMarc Zyngier * them mapped now. 17642247e1bfSMarc Zyngier */ 17652247e1bfSMarc Zyngier vm->vlpi_count[its->list_nr]++; 17662247e1bfSMarc Zyngier 17672247e1bfSMarc Zyngier if (vm->vlpi_count[its->list_nr] == 1) { 17682247e1bfSMarc Zyngier int i; 17692247e1bfSMarc Zyngier 17702247e1bfSMarc Zyngier for (i = 0; i < vm->nr_vpes; i++) { 17712247e1bfSMarc Zyngier struct its_vpe *vpe = vm->vpes[i]; 177244c4c25eSMarc Zyngier struct irq_data *d = irq_get_irq_data(vpe->irq); 17732247e1bfSMarc Zyngier 17742247e1bfSMarc Zyngier /* Map the VPE to the first possible CPU */ 17752247e1bfSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 17762247e1bfSMarc Zyngier its_send_vmapp(its, vpe, true); 17772247e1bfSMarc Zyngier its_send_vinvall(its, vpe); 177844c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); 17792247e1bfSMarc Zyngier } 17802247e1bfSMarc Zyngier } 17812247e1bfSMarc Zyngier 17822247e1bfSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 17832247e1bfSMarc Zyngier } 17842247e1bfSMarc Zyngier 17852247e1bfSMarc Zyngier static void its_unmap_vm(struct its_node *its, struct its_vm *vm) 17862247e1bfSMarc Zyngier { 17872247e1bfSMarc Zyngier unsigned long flags; 17882247e1bfSMarc Zyngier 17892247e1bfSMarc Zyngier /* Not using the ITS list? Everything is always mapped. */ 1790009384b3SMarc Zyngier if (gic_requires_eager_mapping()) 17912247e1bfSMarc Zyngier return; 17922247e1bfSMarc Zyngier 17932247e1bfSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 17942247e1bfSMarc Zyngier 17952247e1bfSMarc Zyngier if (!--vm->vlpi_count[its->list_nr]) { 17962247e1bfSMarc Zyngier int i; 17972247e1bfSMarc Zyngier 17982247e1bfSMarc Zyngier for (i = 0; i < vm->nr_vpes; i++) 17992247e1bfSMarc Zyngier its_send_vmapp(its, vm->vpes[i], false); 18002247e1bfSMarc Zyngier } 18012247e1bfSMarc Zyngier 18022247e1bfSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 18032247e1bfSMarc Zyngier } 18042247e1bfSMarc Zyngier 1805d011e4e6SMarc Zyngier static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) 1806d011e4e6SMarc Zyngier { 1807d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1808d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1809d011e4e6SMarc Zyngier int ret = 0; 1810d011e4e6SMarc Zyngier 1811d011e4e6SMarc Zyngier if (!info->map) 1812d011e4e6SMarc Zyngier return -EINVAL; 1813d011e4e6SMarc Zyngier 181411635fa2SMarc Zyngier raw_spin_lock(&its_dev->event_map.vlpi_lock); 1815d011e4e6SMarc Zyngier 1816d011e4e6SMarc Zyngier if (!its_dev->event_map.vm) { 1817d011e4e6SMarc Zyngier struct its_vlpi_map *maps; 1818d011e4e6SMarc Zyngier 18196396bb22SKees Cook maps = kcalloc(its_dev->event_map.nr_lpis, sizeof(*maps), 182011635fa2SMarc Zyngier GFP_ATOMIC); 1821d011e4e6SMarc Zyngier if (!maps) { 1822d011e4e6SMarc Zyngier ret = -ENOMEM; 1823d011e4e6SMarc Zyngier goto out; 1824d011e4e6SMarc Zyngier } 1825d011e4e6SMarc Zyngier 1826d011e4e6SMarc Zyngier its_dev->event_map.vm = info->map->vm; 1827d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps = maps; 1828d011e4e6SMarc Zyngier } else if (its_dev->event_map.vm != info->map->vm) { 1829d011e4e6SMarc Zyngier ret = -EINVAL; 1830d011e4e6SMarc Zyngier goto out; 1831d011e4e6SMarc Zyngier } 1832d011e4e6SMarc Zyngier 1833d011e4e6SMarc Zyngier /* Get our private copy of the mapping information */ 1834d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps[event] = *info->map; 1835d011e4e6SMarc Zyngier 1836d011e4e6SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1837d011e4e6SMarc Zyngier /* Already mapped, move it around */ 1838d011e4e6SMarc Zyngier its_send_vmovi(its_dev, event); 1839d011e4e6SMarc Zyngier } else { 18402247e1bfSMarc Zyngier /* Ensure all the VPEs are mapped on this ITS */ 18412247e1bfSMarc Zyngier its_map_vm(its_dev->its, info->map->vm); 18422247e1bfSMarc Zyngier 1843d4d7b4adSMarc Zyngier /* 1844d4d7b4adSMarc Zyngier * Flag the interrupt as forwarded so that we can 1845d4d7b4adSMarc Zyngier * start poking the virtual property table. 1846d4d7b4adSMarc Zyngier */ 1847d4d7b4adSMarc Zyngier irqd_set_forwarded_to_vcpu(d); 1848d4d7b4adSMarc Zyngier 1849d4d7b4adSMarc Zyngier /* Write out the property to the prop table */ 1850d4d7b4adSMarc Zyngier lpi_write_config(d, 0xff, info->map->properties); 1851d4d7b4adSMarc Zyngier 1852d011e4e6SMarc Zyngier /* Drop the physical mapping */ 1853d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1854d011e4e6SMarc Zyngier 1855d011e4e6SMarc Zyngier /* and install the virtual one */ 1856d011e4e6SMarc Zyngier its_send_vmapti(its_dev, event); 1857d011e4e6SMarc Zyngier 1858d011e4e6SMarc Zyngier /* Increment the number of VLPIs */ 1859d011e4e6SMarc Zyngier its_dev->event_map.nr_vlpis++; 1860d011e4e6SMarc Zyngier } 1861d011e4e6SMarc Zyngier 1862d011e4e6SMarc Zyngier out: 186311635fa2SMarc Zyngier raw_spin_unlock(&its_dev->event_map.vlpi_lock); 1864d011e4e6SMarc Zyngier return ret; 1865d011e4e6SMarc Zyngier } 1866d011e4e6SMarc Zyngier 1867d011e4e6SMarc Zyngier static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) 1868d011e4e6SMarc Zyngier { 1869d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1870046b5054SMarc Zyngier struct its_vlpi_map *map; 1871d011e4e6SMarc Zyngier int ret = 0; 1872d011e4e6SMarc Zyngier 187311635fa2SMarc Zyngier raw_spin_lock(&its_dev->event_map.vlpi_lock); 1874d011e4e6SMarc Zyngier 1875046b5054SMarc Zyngier map = get_vlpi_map(d); 1876046b5054SMarc Zyngier 1877046b5054SMarc Zyngier if (!its_dev->event_map.vm || !map) { 1878d011e4e6SMarc Zyngier ret = -EINVAL; 1879d011e4e6SMarc Zyngier goto out; 1880d011e4e6SMarc Zyngier } 1881d011e4e6SMarc Zyngier 1882d011e4e6SMarc Zyngier /* Copy our mapping information to the incoming request */ 1883c1d4d5cdSMarc Zyngier *info->map = *map; 1884d011e4e6SMarc Zyngier 1885d011e4e6SMarc Zyngier out: 188611635fa2SMarc Zyngier raw_spin_unlock(&its_dev->event_map.vlpi_lock); 1887d011e4e6SMarc Zyngier return ret; 1888d011e4e6SMarc Zyngier } 1889d011e4e6SMarc Zyngier 1890d011e4e6SMarc Zyngier static int its_vlpi_unmap(struct irq_data *d) 1891d011e4e6SMarc Zyngier { 1892d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1893d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1894d011e4e6SMarc Zyngier int ret = 0; 1895d011e4e6SMarc Zyngier 189611635fa2SMarc Zyngier raw_spin_lock(&its_dev->event_map.vlpi_lock); 1897d011e4e6SMarc Zyngier 1898d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { 1899d011e4e6SMarc Zyngier ret = -EINVAL; 1900d011e4e6SMarc Zyngier goto out; 1901d011e4e6SMarc Zyngier } 1902d011e4e6SMarc Zyngier 1903d011e4e6SMarc Zyngier /* Drop the virtual mapping */ 1904d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1905d011e4e6SMarc Zyngier 1906d011e4e6SMarc Zyngier /* and restore the physical one */ 1907d011e4e6SMarc Zyngier irqd_clr_forwarded_to_vcpu(d); 1908d011e4e6SMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 1909d011e4e6SMarc Zyngier lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | 1910d011e4e6SMarc Zyngier LPI_PROP_ENABLED | 1911d011e4e6SMarc Zyngier LPI_PROP_GROUP1)); 1912d011e4e6SMarc Zyngier 19132247e1bfSMarc Zyngier /* Potentially unmap the VM from this ITS */ 19142247e1bfSMarc Zyngier its_unmap_vm(its_dev->its, its_dev->event_map.vm); 19152247e1bfSMarc Zyngier 1916d011e4e6SMarc Zyngier /* 1917d011e4e6SMarc Zyngier * Drop the refcount and make the device available again if 1918d011e4e6SMarc Zyngier * this was the last VLPI. 1919d011e4e6SMarc Zyngier */ 1920d011e4e6SMarc Zyngier if (!--its_dev->event_map.nr_vlpis) { 1921d011e4e6SMarc Zyngier its_dev->event_map.vm = NULL; 1922d011e4e6SMarc Zyngier kfree(its_dev->event_map.vlpi_maps); 1923d011e4e6SMarc Zyngier } 1924d011e4e6SMarc Zyngier 1925d011e4e6SMarc Zyngier out: 192611635fa2SMarc Zyngier raw_spin_unlock(&its_dev->event_map.vlpi_lock); 1927d011e4e6SMarc Zyngier return ret; 1928d011e4e6SMarc Zyngier } 1929d011e4e6SMarc Zyngier 1930015ec038SMarc Zyngier static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) 1931015ec038SMarc Zyngier { 1932015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1933015ec038SMarc Zyngier 1934015ec038SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) 1935015ec038SMarc Zyngier return -EINVAL; 1936015ec038SMarc Zyngier 1937015ec038SMarc Zyngier if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) 1938015ec038SMarc Zyngier lpi_update_config(d, 0xff, info->config); 1939015ec038SMarc Zyngier else 1940015ec038SMarc Zyngier lpi_write_config(d, 0xff, info->config); 1941015ec038SMarc Zyngier its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); 1942015ec038SMarc Zyngier 1943015ec038SMarc Zyngier return 0; 1944015ec038SMarc Zyngier } 1945015ec038SMarc Zyngier 1946c808eea8SMarc Zyngier static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 1947c808eea8SMarc Zyngier { 1948c808eea8SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1949c808eea8SMarc Zyngier struct its_cmd_info *info = vcpu_info; 1950c808eea8SMarc Zyngier 1951c808eea8SMarc Zyngier /* Need a v4 ITS */ 19520dd57fedSMarc Zyngier if (!is_v4(its_dev->its)) 1953c808eea8SMarc Zyngier return -EINVAL; 1954c808eea8SMarc Zyngier 1955d011e4e6SMarc Zyngier /* Unmap request? */ 1956d011e4e6SMarc Zyngier if (!info) 1957d011e4e6SMarc Zyngier return its_vlpi_unmap(d); 1958d011e4e6SMarc Zyngier 1959c808eea8SMarc Zyngier switch (info->cmd_type) { 1960c808eea8SMarc Zyngier case MAP_VLPI: 1961d011e4e6SMarc Zyngier return its_vlpi_map(d, info); 1962c808eea8SMarc Zyngier 1963c808eea8SMarc Zyngier case GET_VLPI: 1964d011e4e6SMarc Zyngier return its_vlpi_get(d, info); 1965c808eea8SMarc Zyngier 1966c808eea8SMarc Zyngier case PROP_UPDATE_VLPI: 1967c808eea8SMarc Zyngier case PROP_UPDATE_AND_INV_VLPI: 1968015ec038SMarc Zyngier return its_vlpi_prop_update(d, info); 1969c808eea8SMarc Zyngier 1970c808eea8SMarc Zyngier default: 1971c808eea8SMarc Zyngier return -EINVAL; 1972c808eea8SMarc Zyngier } 1973c808eea8SMarc Zyngier } 1974c808eea8SMarc Zyngier 1975c48ed51cSMarc Zyngier static struct irq_chip its_irq_chip = { 1976c48ed51cSMarc Zyngier .name = "ITS", 1977c48ed51cSMarc Zyngier .irq_mask = its_mask_irq, 1978c48ed51cSMarc Zyngier .irq_unmask = its_unmask_irq, 1979004fa08dSAshok Kumar .irq_eoi = irq_chip_eoi_parent, 1980c48ed51cSMarc Zyngier .irq_set_affinity = its_set_affinity, 1981b48ac83dSMarc Zyngier .irq_compose_msi_msg = its_irq_compose_msi_msg, 19828d85dcedSMarc Zyngier .irq_set_irqchip_state = its_irq_set_irqchip_state, 19835f774f5eSMarc Zyngier .irq_retrigger = its_irq_retrigger, 1984c808eea8SMarc Zyngier .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, 1985b48ac83dSMarc Zyngier }; 1986b48ac83dSMarc Zyngier 1987880cb3cdSMarc Zyngier 1988bf9529f8SMarc Zyngier /* 1989bf9529f8SMarc Zyngier * How we allocate LPIs: 1990bf9529f8SMarc Zyngier * 1991880cb3cdSMarc Zyngier * lpi_range_list contains ranges of LPIs that are to available to 1992880cb3cdSMarc Zyngier * allocate from. To allocate LPIs, just pick the first range that 1993880cb3cdSMarc Zyngier * fits the required allocation, and reduce it by the required 1994880cb3cdSMarc Zyngier * amount. Once empty, remove the range from the list. 1995bf9529f8SMarc Zyngier * 1996880cb3cdSMarc Zyngier * To free a range of LPIs, add a free range to the list, sort it and 1997880cb3cdSMarc Zyngier * merge the result if the new range happens to be adjacent to an 1998880cb3cdSMarc Zyngier * already free block. 1999880cb3cdSMarc Zyngier * 2000880cb3cdSMarc Zyngier * The consequence of the above is that allocation is cost is low, but 2001880cb3cdSMarc Zyngier * freeing is expensive. We assumes that freeing rarely occurs. 2002880cb3cdSMarc Zyngier */ 20034cb205c0SJia He #define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ 2004880cb3cdSMarc Zyngier 2005880cb3cdSMarc Zyngier static DEFINE_MUTEX(lpi_range_lock); 2006880cb3cdSMarc Zyngier static LIST_HEAD(lpi_range_list); 2007bf9529f8SMarc Zyngier 2008880cb3cdSMarc Zyngier struct lpi_range { 2009880cb3cdSMarc Zyngier struct list_head entry; 2010880cb3cdSMarc Zyngier u32 base_id; 2011880cb3cdSMarc Zyngier u32 span; 2012880cb3cdSMarc Zyngier }; 2013880cb3cdSMarc Zyngier 2014880cb3cdSMarc Zyngier static struct lpi_range *mk_lpi_range(u32 base, u32 span) 2015bf9529f8SMarc Zyngier { 2016880cb3cdSMarc Zyngier struct lpi_range *range; 2017880cb3cdSMarc Zyngier 20181c73fac5SRasmus Villemoes range = kmalloc(sizeof(*range), GFP_KERNEL); 2019880cb3cdSMarc Zyngier if (range) { 2020880cb3cdSMarc Zyngier range->base_id = base; 2021880cb3cdSMarc Zyngier range->span = span; 2022bf9529f8SMarc Zyngier } 2023bf9529f8SMarc Zyngier 2024880cb3cdSMarc Zyngier return range; 2025880cb3cdSMarc Zyngier } 2026880cb3cdSMarc Zyngier 2027880cb3cdSMarc Zyngier static int alloc_lpi_range(u32 nr_lpis, u32 *base) 2028880cb3cdSMarc Zyngier { 2029880cb3cdSMarc Zyngier struct lpi_range *range, *tmp; 2030880cb3cdSMarc Zyngier int err = -ENOSPC; 2031880cb3cdSMarc Zyngier 2032880cb3cdSMarc Zyngier mutex_lock(&lpi_range_lock); 2033880cb3cdSMarc Zyngier 2034880cb3cdSMarc Zyngier list_for_each_entry_safe(range, tmp, &lpi_range_list, entry) { 2035880cb3cdSMarc Zyngier if (range->span >= nr_lpis) { 2036880cb3cdSMarc Zyngier *base = range->base_id; 2037880cb3cdSMarc Zyngier range->base_id += nr_lpis; 2038880cb3cdSMarc Zyngier range->span -= nr_lpis; 2039880cb3cdSMarc Zyngier 2040880cb3cdSMarc Zyngier if (range->span == 0) { 2041880cb3cdSMarc Zyngier list_del(&range->entry); 2042880cb3cdSMarc Zyngier kfree(range); 2043880cb3cdSMarc Zyngier } 2044880cb3cdSMarc Zyngier 2045880cb3cdSMarc Zyngier err = 0; 2046880cb3cdSMarc Zyngier break; 2047880cb3cdSMarc Zyngier } 2048880cb3cdSMarc Zyngier } 2049880cb3cdSMarc Zyngier 2050880cb3cdSMarc Zyngier mutex_unlock(&lpi_range_lock); 2051880cb3cdSMarc Zyngier 2052880cb3cdSMarc Zyngier pr_debug("ITS: alloc %u:%u\n", *base, nr_lpis); 2053880cb3cdSMarc Zyngier return err; 2054880cb3cdSMarc Zyngier } 2055880cb3cdSMarc Zyngier 205612eade12SRasmus Villemoes static void merge_lpi_ranges(struct lpi_range *a, struct lpi_range *b) 205712eade12SRasmus Villemoes { 205812eade12SRasmus Villemoes if (&a->entry == &lpi_range_list || &b->entry == &lpi_range_list) 205912eade12SRasmus Villemoes return; 206012eade12SRasmus Villemoes if (a->base_id + a->span != b->base_id) 206112eade12SRasmus Villemoes return; 206212eade12SRasmus Villemoes b->base_id = a->base_id; 206312eade12SRasmus Villemoes b->span += a->span; 206412eade12SRasmus Villemoes list_del(&a->entry); 206512eade12SRasmus Villemoes kfree(a); 206612eade12SRasmus Villemoes } 206712eade12SRasmus Villemoes 2068880cb3cdSMarc Zyngier static int free_lpi_range(u32 base, u32 nr_lpis) 2069880cb3cdSMarc Zyngier { 207012eade12SRasmus Villemoes struct lpi_range *new, *old; 2071880cb3cdSMarc Zyngier 2072880cb3cdSMarc Zyngier new = mk_lpi_range(base, nr_lpis); 2073b31a3838SRasmus Villemoes if (!new) 2074b31a3838SRasmus Villemoes return -ENOMEM; 2075880cb3cdSMarc Zyngier 2076880cb3cdSMarc Zyngier mutex_lock(&lpi_range_lock); 2077880cb3cdSMarc Zyngier 207812eade12SRasmus Villemoes list_for_each_entry_reverse(old, &lpi_range_list, entry) { 207912eade12SRasmus Villemoes if (old->base_id < base) 208012eade12SRasmus Villemoes break; 2081880cb3cdSMarc Zyngier } 208212eade12SRasmus Villemoes /* 208312eade12SRasmus Villemoes * old is the last element with ->base_id smaller than base, 208412eade12SRasmus Villemoes * so new goes right after it. If there are no elements with 208512eade12SRasmus Villemoes * ->base_id smaller than base, &old->entry ends up pointing 208612eade12SRasmus Villemoes * at the head of the list, and inserting new it the start of 208712eade12SRasmus Villemoes * the list is the right thing to do in that case as well. 208812eade12SRasmus Villemoes */ 208912eade12SRasmus Villemoes list_add(&new->entry, &old->entry); 209012eade12SRasmus Villemoes /* 209112eade12SRasmus Villemoes * Now check if we can merge with the preceding and/or 209212eade12SRasmus Villemoes * following ranges. 209312eade12SRasmus Villemoes */ 209412eade12SRasmus Villemoes merge_lpi_ranges(old, new); 209512eade12SRasmus Villemoes merge_lpi_ranges(new, list_next_entry(new, entry)); 2096880cb3cdSMarc Zyngier 2097880cb3cdSMarc Zyngier mutex_unlock(&lpi_range_lock); 2098b31a3838SRasmus Villemoes return 0; 2099bf9529f8SMarc Zyngier } 2100bf9529f8SMarc Zyngier 210104a0e4deSTomasz Nowicki static int __init its_lpi_init(u32 id_bits) 2102bf9529f8SMarc Zyngier { 2103880cb3cdSMarc Zyngier u32 lpis = (1UL << id_bits) - 8192; 210412b2905aSMarc Zyngier u32 numlpis; 2105880cb3cdSMarc Zyngier int err; 2106bf9529f8SMarc Zyngier 210712b2905aSMarc Zyngier numlpis = 1UL << GICD_TYPER_NUM_LPIS(gic_rdists->gicd_typer); 210812b2905aSMarc Zyngier 210912b2905aSMarc Zyngier if (numlpis > 2 && !WARN_ON(numlpis > lpis)) { 211012b2905aSMarc Zyngier lpis = numlpis; 211112b2905aSMarc Zyngier pr_info("ITS: Using hypervisor restricted LPI range [%u]\n", 211212b2905aSMarc Zyngier lpis); 211312b2905aSMarc Zyngier } 211412b2905aSMarc Zyngier 2115880cb3cdSMarc Zyngier /* 2116880cb3cdSMarc Zyngier * Initializing the allocator is just the same as freeing the 2117880cb3cdSMarc Zyngier * full range of LPIs. 2118880cb3cdSMarc Zyngier */ 2119880cb3cdSMarc Zyngier err = free_lpi_range(8192, lpis); 2120880cb3cdSMarc Zyngier pr_debug("ITS: Allocator initialized for %u LPIs\n", lpis); 2121880cb3cdSMarc Zyngier return err; 2122bf9529f8SMarc Zyngier } 2123bf9529f8SMarc Zyngier 212438dd7c49SMarc Zyngier static unsigned long *its_lpi_alloc(int nr_irqs, u32 *base, int *nr_ids) 2125bf9529f8SMarc Zyngier { 2126bf9529f8SMarc Zyngier unsigned long *bitmap = NULL; 2127880cb3cdSMarc Zyngier int err = 0; 2128bf9529f8SMarc Zyngier 2129bf9529f8SMarc Zyngier do { 213038dd7c49SMarc Zyngier err = alloc_lpi_range(nr_irqs, base); 2131880cb3cdSMarc Zyngier if (!err) 2132bf9529f8SMarc Zyngier break; 2133bf9529f8SMarc Zyngier 213438dd7c49SMarc Zyngier nr_irqs /= 2; 213538dd7c49SMarc Zyngier } while (nr_irqs > 0); 2136bf9529f8SMarc Zyngier 213745725e0fSMarc Zyngier if (!nr_irqs) 213845725e0fSMarc Zyngier err = -ENOSPC; 213945725e0fSMarc Zyngier 2140880cb3cdSMarc Zyngier if (err) 2141bf9529f8SMarc Zyngier goto out; 2142bf9529f8SMarc Zyngier 2143ff5fe886SAndy Shevchenko bitmap = bitmap_zalloc(nr_irqs, GFP_ATOMIC); 2144bf9529f8SMarc Zyngier if (!bitmap) 2145bf9529f8SMarc Zyngier goto out; 2146bf9529f8SMarc Zyngier 214738dd7c49SMarc Zyngier *nr_ids = nr_irqs; 2148bf9529f8SMarc Zyngier 2149bf9529f8SMarc Zyngier out: 2150c8415b94SMarc Zyngier if (!bitmap) 2151c8415b94SMarc Zyngier *base = *nr_ids = 0; 2152c8415b94SMarc Zyngier 2153bf9529f8SMarc Zyngier return bitmap; 2154bf9529f8SMarc Zyngier } 2155bf9529f8SMarc Zyngier 215638dd7c49SMarc Zyngier static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids) 2157bf9529f8SMarc Zyngier { 2158880cb3cdSMarc Zyngier WARN_ON(free_lpi_range(base, nr_ids)); 2159ff5fe886SAndy Shevchenko bitmap_free(bitmap); 2160bf9529f8SMarc Zyngier } 21611ac19ca6SMarc Zyngier 2162053be485SMarc Zyngier static void gic_reset_prop_table(void *va) 2163053be485SMarc Zyngier { 2164053be485SMarc Zyngier /* Priority 0xa0, Group-1, disabled */ 2165053be485SMarc Zyngier memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ); 2166053be485SMarc Zyngier 2167053be485SMarc Zyngier /* Make sure the GIC will observe the written configuration */ 2168053be485SMarc Zyngier gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ); 2169053be485SMarc Zyngier } 2170053be485SMarc Zyngier 21710e5ccf91SMarc Zyngier static struct page *its_allocate_prop_table(gfp_t gfp_flags) 21720e5ccf91SMarc Zyngier { 21730e5ccf91SMarc Zyngier struct page *prop_page; 21741ac19ca6SMarc Zyngier 21750e5ccf91SMarc Zyngier prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); 21760e5ccf91SMarc Zyngier if (!prop_page) 21770e5ccf91SMarc Zyngier return NULL; 21780e5ccf91SMarc Zyngier 2179053be485SMarc Zyngier gic_reset_prop_table(page_address(prop_page)); 21800e5ccf91SMarc Zyngier 21810e5ccf91SMarc Zyngier return prop_page; 21820e5ccf91SMarc Zyngier } 21830e5ccf91SMarc Zyngier 21847d75bbb4SMarc Zyngier static void its_free_prop_table(struct page *prop_page) 21857d75bbb4SMarc Zyngier { 21867d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(prop_page), 21877d75bbb4SMarc Zyngier get_order(LPI_PROPBASE_SZ)); 21887d75bbb4SMarc Zyngier } 21891ac19ca6SMarc Zyngier 21905e2c9f9aSMarc Zyngier static bool gic_check_reserved_range(phys_addr_t addr, unsigned long size) 21915e2c9f9aSMarc Zyngier { 21925e2c9f9aSMarc Zyngier phys_addr_t start, end, addr_end; 21935e2c9f9aSMarc Zyngier u64 i; 21945e2c9f9aSMarc Zyngier 21955e2c9f9aSMarc Zyngier /* 21965e2c9f9aSMarc Zyngier * We don't bother checking for a kdump kernel as by 21975e2c9f9aSMarc Zyngier * construction, the LPI tables are out of this kernel's 21985e2c9f9aSMarc Zyngier * memory map. 21995e2c9f9aSMarc Zyngier */ 22005e2c9f9aSMarc Zyngier if (is_kdump_kernel()) 22015e2c9f9aSMarc Zyngier return true; 22025e2c9f9aSMarc Zyngier 22035e2c9f9aSMarc Zyngier addr_end = addr + size - 1; 22045e2c9f9aSMarc Zyngier 22059f3d5eaaSMike Rapoport for_each_reserved_mem_range(i, &start, &end) { 22065e2c9f9aSMarc Zyngier if (addr >= start && addr_end <= end) 22075e2c9f9aSMarc Zyngier return true; 22085e2c9f9aSMarc Zyngier } 22095e2c9f9aSMarc Zyngier 22105e2c9f9aSMarc Zyngier /* Not found, not a good sign... */ 22115e2c9f9aSMarc Zyngier pr_warn("GICv3: Expected reserved range [%pa:%pa], not found\n", 22125e2c9f9aSMarc Zyngier &addr, &addr_end); 22135e2c9f9aSMarc Zyngier add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 22145e2c9f9aSMarc Zyngier return false; 22155e2c9f9aSMarc Zyngier } 22165e2c9f9aSMarc Zyngier 22173fb68faeSMarc Zyngier static int gic_reserve_range(phys_addr_t addr, unsigned long size) 22183fb68faeSMarc Zyngier { 22193fb68faeSMarc Zyngier if (efi_enabled(EFI_CONFIG_TABLES)) 22203fb68faeSMarc Zyngier return efi_mem_reserve_persistent(addr, size); 22213fb68faeSMarc Zyngier 22223fb68faeSMarc Zyngier return 0; 22233fb68faeSMarc Zyngier } 22243fb68faeSMarc Zyngier 222511e37d35SMarc Zyngier static int __init its_setup_lpi_prop_table(void) 22261ac19ca6SMarc Zyngier { 2227c440a9d9SMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) { 2228c440a9d9SMarc Zyngier u64 val; 2229c440a9d9SMarc Zyngier 2230c440a9d9SMarc Zyngier val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); 2231c440a9d9SMarc Zyngier lpi_id_bits = (val & GICR_PROPBASER_IDBITS_MASK) + 1; 2232c440a9d9SMarc Zyngier 2233c440a9d9SMarc Zyngier gic_rdists->prop_table_pa = val & GENMASK_ULL(51, 12); 2234c440a9d9SMarc Zyngier gic_rdists->prop_table_va = memremap(gic_rdists->prop_table_pa, 2235c440a9d9SMarc Zyngier LPI_PROPBASE_SZ, 2236c440a9d9SMarc Zyngier MEMREMAP_WB); 2237c440a9d9SMarc Zyngier gic_reset_prop_table(gic_rdists->prop_table_va); 2238c440a9d9SMarc Zyngier } else { 2239e1a2e201SMarc Zyngier struct page *page; 22401ac19ca6SMarc Zyngier 2241c440a9d9SMarc Zyngier lpi_id_bits = min_t(u32, 2242c440a9d9SMarc Zyngier GICD_TYPER_ID_BITS(gic_rdists->gicd_typer), 22434cb205c0SJia He ITS_MAX_LPI_NRBITS); 2244e1a2e201SMarc Zyngier page = its_allocate_prop_table(GFP_NOWAIT); 2245e1a2e201SMarc Zyngier if (!page) { 22461ac19ca6SMarc Zyngier pr_err("Failed to allocate PROPBASE\n"); 22471ac19ca6SMarc Zyngier return -ENOMEM; 22481ac19ca6SMarc Zyngier } 22491ac19ca6SMarc Zyngier 2250e1a2e201SMarc Zyngier gic_rdists->prop_table_pa = page_to_phys(page); 2251e1a2e201SMarc Zyngier gic_rdists->prop_table_va = page_address(page); 22523fb68faeSMarc Zyngier WARN_ON(gic_reserve_range(gic_rdists->prop_table_pa, 22533fb68faeSMarc Zyngier LPI_PROPBASE_SZ)); 2254c440a9d9SMarc Zyngier } 2255e1a2e201SMarc Zyngier 2256e1a2e201SMarc Zyngier pr_info("GICv3: using LPI property table @%pa\n", 2257e1a2e201SMarc Zyngier &gic_rdists->prop_table_pa); 22581ac19ca6SMarc Zyngier 22596c31e123SShanker Donthineni return its_lpi_init(lpi_id_bits); 22601ac19ca6SMarc Zyngier } 22611ac19ca6SMarc Zyngier 22621ac19ca6SMarc Zyngier static const char *its_base_type_string[] = { 22631ac19ca6SMarc Zyngier [GITS_BASER_TYPE_DEVICE] = "Devices", 22641ac19ca6SMarc Zyngier [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", 22654f46de9dSMarc Zyngier [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", 22661ac19ca6SMarc Zyngier [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", 22671ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", 22681ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", 22691ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", 22701ac19ca6SMarc Zyngier }; 22711ac19ca6SMarc Zyngier 22722d81d425SShanker Donthineni static u64 its_read_baser(struct its_node *its, struct its_baser *baser) 22732d81d425SShanker Donthineni { 22742d81d425SShanker Donthineni u32 idx = baser - its->tables; 22752d81d425SShanker Donthineni 22760968a619SVladimir Murzin return gits_read_baser(its->base + GITS_BASER + (idx << 3)); 22772d81d425SShanker Donthineni } 22782d81d425SShanker Donthineni 22792d81d425SShanker Donthineni static void its_write_baser(struct its_node *its, struct its_baser *baser, 22802d81d425SShanker Donthineni u64 val) 22812d81d425SShanker Donthineni { 22822d81d425SShanker Donthineni u32 idx = baser - its->tables; 22832d81d425SShanker Donthineni 22840968a619SVladimir Murzin gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); 22852d81d425SShanker Donthineni baser->val = its_read_baser(its, baser); 22862d81d425SShanker Donthineni } 22872d81d425SShanker Donthineni 22889347359aSShanker Donthineni static int its_setup_baser(struct its_node *its, struct its_baser *baser, 2289d5df9dc9SMarc Zyngier u64 cache, u64 shr, u32 order, bool indirect) 22909347359aSShanker Donthineni { 22919347359aSShanker Donthineni u64 val = its_read_baser(its, baser); 22929347359aSShanker Donthineni u64 esz = GITS_BASER_ENTRY_SIZE(val); 22939347359aSShanker Donthineni u64 type = GITS_BASER_TYPE(val); 229430ae9610SShanker Donthineni u64 baser_phys, tmp; 2295d5df9dc9SMarc Zyngier u32 alloc_pages, psz; 2296539d3782SShanker Donthineni struct page *page; 22979347359aSShanker Donthineni void *base; 22989347359aSShanker Donthineni 2299d5df9dc9SMarc Zyngier psz = baser->psz; 23009347359aSShanker Donthineni alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); 23019347359aSShanker Donthineni if (alloc_pages > GITS_BASER_PAGES_MAX) { 23029347359aSShanker Donthineni pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", 23039347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 23049347359aSShanker Donthineni alloc_pages, GITS_BASER_PAGES_MAX); 23059347359aSShanker Donthineni alloc_pages = GITS_BASER_PAGES_MAX; 23069347359aSShanker Donthineni order = get_order(GITS_BASER_PAGES_MAX * psz); 23079347359aSShanker Donthineni } 23089347359aSShanker Donthineni 2309539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, order); 2310539d3782SShanker Donthineni if (!page) 23119347359aSShanker Donthineni return -ENOMEM; 23129347359aSShanker Donthineni 2313539d3782SShanker Donthineni base = (void *)page_address(page); 231430ae9610SShanker Donthineni baser_phys = virt_to_phys(base); 231530ae9610SShanker Donthineni 231630ae9610SShanker Donthineni /* Check if the physical address of the memory is above 48bits */ 231730ae9610SShanker Donthineni if (IS_ENABLED(CONFIG_ARM64_64K_PAGES) && (baser_phys >> 48)) { 231830ae9610SShanker Donthineni 231930ae9610SShanker Donthineni /* 52bit PA is supported only when PageSize=64K */ 232030ae9610SShanker Donthineni if (psz != SZ_64K) { 232130ae9610SShanker Donthineni pr_err("ITS: no 52bit PA support when psz=%d\n", psz); 232230ae9610SShanker Donthineni free_pages((unsigned long)base, order); 232330ae9610SShanker Donthineni return -ENXIO; 232430ae9610SShanker Donthineni } 232530ae9610SShanker Donthineni 232630ae9610SShanker Donthineni /* Convert 52bit PA to 48bit field */ 232730ae9610SShanker Donthineni baser_phys = GITS_BASER_PHYS_52_to_48(baser_phys); 232830ae9610SShanker Donthineni } 232930ae9610SShanker Donthineni 23309347359aSShanker Donthineni retry_baser: 233130ae9610SShanker Donthineni val = (baser_phys | 23329347359aSShanker Donthineni (type << GITS_BASER_TYPE_SHIFT) | 23339347359aSShanker Donthineni ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | 23349347359aSShanker Donthineni ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | 23359347359aSShanker Donthineni cache | 23369347359aSShanker Donthineni shr | 23379347359aSShanker Donthineni GITS_BASER_VALID); 23389347359aSShanker Donthineni 23393faf24eaSShanker Donthineni val |= indirect ? GITS_BASER_INDIRECT : 0x0; 23403faf24eaSShanker Donthineni 23419347359aSShanker Donthineni switch (psz) { 23429347359aSShanker Donthineni case SZ_4K: 23439347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_4K; 23449347359aSShanker Donthineni break; 23459347359aSShanker Donthineni case SZ_16K: 23469347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_16K; 23479347359aSShanker Donthineni break; 23489347359aSShanker Donthineni case SZ_64K: 23499347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_64K; 23509347359aSShanker Donthineni break; 23519347359aSShanker Donthineni } 23529347359aSShanker Donthineni 23539347359aSShanker Donthineni its_write_baser(its, baser, val); 23549347359aSShanker Donthineni tmp = baser->val; 23559347359aSShanker Donthineni 23569347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { 23579347359aSShanker Donthineni /* 23589347359aSShanker Donthineni * Shareability didn't stick. Just use 23599347359aSShanker Donthineni * whatever the read reported, which is likely 23609347359aSShanker Donthineni * to be the only thing this redistributor 23619347359aSShanker Donthineni * supports. If that's zero, make it 23629347359aSShanker Donthineni * non-cacheable as well. 23639347359aSShanker Donthineni */ 23649347359aSShanker Donthineni shr = tmp & GITS_BASER_SHAREABILITY_MASK; 23659347359aSShanker Donthineni if (!shr) { 23669347359aSShanker Donthineni cache = GITS_BASER_nC; 2367328191c0SVladimir Murzin gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); 23689347359aSShanker Donthineni } 23699347359aSShanker Donthineni goto retry_baser; 23709347359aSShanker Donthineni } 23719347359aSShanker Donthineni 23729347359aSShanker Donthineni if (val != tmp) { 2373b11283ebSVladimir Murzin pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", 23749347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 2375b11283ebSVladimir Murzin val, tmp); 23769347359aSShanker Donthineni free_pages((unsigned long)base, order); 23779347359aSShanker Donthineni return -ENXIO; 23789347359aSShanker Donthineni } 23799347359aSShanker Donthineni 23809347359aSShanker Donthineni baser->order = order; 23819347359aSShanker Donthineni baser->base = base; 23829347359aSShanker Donthineni baser->psz = psz; 23833faf24eaSShanker Donthineni tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; 23849347359aSShanker Donthineni 23853faf24eaSShanker Donthineni pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", 2386d524eaa2SVladimir Murzin &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), 23879347359aSShanker Donthineni its_base_type_string[type], 23889347359aSShanker Donthineni (unsigned long)virt_to_phys(base), 23893faf24eaSShanker Donthineni indirect ? "indirect" : "flat", (int)esz, 23909347359aSShanker Donthineni psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); 23919347359aSShanker Donthineni 23929347359aSShanker Donthineni return 0; 23939347359aSShanker Donthineni } 23949347359aSShanker Donthineni 23954cacac57SMarc Zyngier static bool its_parse_indirect_baser(struct its_node *its, 23964cacac57SMarc Zyngier struct its_baser *baser, 2397d5df9dc9SMarc Zyngier u32 *order, u32 ids) 23984b75c459SShanker Donthineni { 23994cacac57SMarc Zyngier u64 tmp = its_read_baser(its, baser); 24004cacac57SMarc Zyngier u64 type = GITS_BASER_TYPE(tmp); 24014cacac57SMarc Zyngier u64 esz = GITS_BASER_ENTRY_SIZE(tmp); 24022fd632a0SShanker Donthineni u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; 24034b75c459SShanker Donthineni u32 new_order = *order; 2404d5df9dc9SMarc Zyngier u32 psz = baser->psz; 24053faf24eaSShanker Donthineni bool indirect = false; 24063faf24eaSShanker Donthineni 24073faf24eaSShanker Donthineni /* No need to enable Indirection if memory requirement < (psz*2)bytes */ 24083faf24eaSShanker Donthineni if ((esz << ids) > (psz * 2)) { 24093faf24eaSShanker Donthineni /* 24103faf24eaSShanker Donthineni * Find out whether hw supports a single or two-level table by 24113faf24eaSShanker Donthineni * table by reading bit at offset '62' after writing '1' to it. 24123faf24eaSShanker Donthineni */ 24133faf24eaSShanker Donthineni its_write_baser(its, baser, val | GITS_BASER_INDIRECT); 24143faf24eaSShanker Donthineni indirect = !!(baser->val & GITS_BASER_INDIRECT); 24153faf24eaSShanker Donthineni 24163faf24eaSShanker Donthineni if (indirect) { 24173faf24eaSShanker Donthineni /* 24183faf24eaSShanker Donthineni * The size of the lvl2 table is equal to ITS page size 24193faf24eaSShanker Donthineni * which is 'psz'. For computing lvl1 table size, 24203faf24eaSShanker Donthineni * subtract ID bits that sparse lvl2 table from 'ids' 24213faf24eaSShanker Donthineni * which is reported by ITS hardware times lvl1 table 24223faf24eaSShanker Donthineni * entry size. 24233faf24eaSShanker Donthineni */ 2424d524eaa2SVladimir Murzin ids -= ilog2(psz / (int)esz); 24253faf24eaSShanker Donthineni esz = GITS_LVL1_ENTRY_SIZE; 24263faf24eaSShanker Donthineni } 24273faf24eaSShanker Donthineni } 24284b75c459SShanker Donthineni 24294b75c459SShanker Donthineni /* 24304b75c459SShanker Donthineni * Allocate as many entries as required to fit the 24314b75c459SShanker Donthineni * range of device IDs that the ITS can grok... The ID 24324b75c459SShanker Donthineni * space being incredibly sparse, this results in a 24333faf24eaSShanker Donthineni * massive waste of memory if two-level device table 24343faf24eaSShanker Donthineni * feature is not supported by hardware. 24354b75c459SShanker Donthineni */ 24364b75c459SShanker Donthineni new_order = max_t(u32, get_order(esz << ids), new_order); 24374b75c459SShanker Donthineni if (new_order >= MAX_ORDER) { 24384b75c459SShanker Donthineni new_order = MAX_ORDER - 1; 2439d524eaa2SVladimir Murzin ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); 2440576a8342SMarc Zyngier pr_warn("ITS@%pa: %s Table too large, reduce ids %llu->%u\n", 24414cacac57SMarc Zyngier &its->phys_base, its_base_type_string[type], 2442576a8342SMarc Zyngier device_ids(its), ids); 24434b75c459SShanker Donthineni } 24444b75c459SShanker Donthineni 24454b75c459SShanker Donthineni *order = new_order; 24463faf24eaSShanker Donthineni 24473faf24eaSShanker Donthineni return indirect; 24484b75c459SShanker Donthineni } 24494b75c459SShanker Donthineni 24505e516846SMarc Zyngier static u32 compute_common_aff(u64 val) 24515e516846SMarc Zyngier { 24525e516846SMarc Zyngier u32 aff, clpiaff; 24535e516846SMarc Zyngier 24545e516846SMarc Zyngier aff = FIELD_GET(GICR_TYPER_AFFINITY, val); 24555e516846SMarc Zyngier clpiaff = FIELD_GET(GICR_TYPER_COMMON_LPI_AFF, val); 24565e516846SMarc Zyngier 24575e516846SMarc Zyngier return aff & ~(GENMASK(31, 0) >> (clpiaff * 8)); 24585e516846SMarc Zyngier } 24595e516846SMarc Zyngier 24605e516846SMarc Zyngier static u32 compute_its_aff(struct its_node *its) 24615e516846SMarc Zyngier { 24625e516846SMarc Zyngier u64 val; 24635e516846SMarc Zyngier u32 svpet; 24645e516846SMarc Zyngier 24655e516846SMarc Zyngier /* 24665e516846SMarc Zyngier * Reencode the ITS SVPET and MPIDR as a GICR_TYPER, and compute 24675e516846SMarc Zyngier * the resulting affinity. We then use that to see if this match 24685e516846SMarc Zyngier * our own affinity. 24695e516846SMarc Zyngier */ 24705e516846SMarc Zyngier svpet = FIELD_GET(GITS_TYPER_SVPET, its->typer); 24715e516846SMarc Zyngier val = FIELD_PREP(GICR_TYPER_COMMON_LPI_AFF, svpet); 24725e516846SMarc Zyngier val |= FIELD_PREP(GICR_TYPER_AFFINITY, its->mpidr); 24735e516846SMarc Zyngier return compute_common_aff(val); 24745e516846SMarc Zyngier } 24755e516846SMarc Zyngier 24765e516846SMarc Zyngier static struct its_node *find_sibling_its(struct its_node *cur_its) 24775e516846SMarc Zyngier { 24785e516846SMarc Zyngier struct its_node *its; 24795e516846SMarc Zyngier u32 aff; 24805e516846SMarc Zyngier 24815e516846SMarc Zyngier if (!FIELD_GET(GITS_TYPER_SVPET, cur_its->typer)) 24825e516846SMarc Zyngier return NULL; 24835e516846SMarc Zyngier 24845e516846SMarc Zyngier aff = compute_its_aff(cur_its); 24855e516846SMarc Zyngier 24865e516846SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 24875e516846SMarc Zyngier u64 baser; 24885e516846SMarc Zyngier 24895e516846SMarc Zyngier if (!is_v4_1(its) || its == cur_its) 24905e516846SMarc Zyngier continue; 24915e516846SMarc Zyngier 24925e516846SMarc Zyngier if (!FIELD_GET(GITS_TYPER_SVPET, its->typer)) 24935e516846SMarc Zyngier continue; 24945e516846SMarc Zyngier 24955e516846SMarc Zyngier if (aff != compute_its_aff(its)) 24965e516846SMarc Zyngier continue; 24975e516846SMarc Zyngier 24985e516846SMarc Zyngier /* GICv4.1 guarantees that the vPE table is GITS_BASER2 */ 24995e516846SMarc Zyngier baser = its->tables[2].val; 25005e516846SMarc Zyngier if (!(baser & GITS_BASER_VALID)) 25015e516846SMarc Zyngier continue; 25025e516846SMarc Zyngier 25035e516846SMarc Zyngier return its; 25045e516846SMarc Zyngier } 25055e516846SMarc Zyngier 25065e516846SMarc Zyngier return NULL; 25075e516846SMarc Zyngier } 25085e516846SMarc Zyngier 25091ac19ca6SMarc Zyngier static void its_free_tables(struct its_node *its) 25101ac19ca6SMarc Zyngier { 25111ac19ca6SMarc Zyngier int i; 25121ac19ca6SMarc Zyngier 25131ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 25141a485f4dSShanker Donthineni if (its->tables[i].base) { 25151a485f4dSShanker Donthineni free_pages((unsigned long)its->tables[i].base, 25161a485f4dSShanker Donthineni its->tables[i].order); 25171a485f4dSShanker Donthineni its->tables[i].base = NULL; 25181ac19ca6SMarc Zyngier } 25191ac19ca6SMarc Zyngier } 25201ac19ca6SMarc Zyngier } 25211ac19ca6SMarc Zyngier 2522d5df9dc9SMarc Zyngier static int its_probe_baser_psz(struct its_node *its, struct its_baser *baser) 2523d5df9dc9SMarc Zyngier { 2524d5df9dc9SMarc Zyngier u64 psz = SZ_64K; 2525d5df9dc9SMarc Zyngier 2526d5df9dc9SMarc Zyngier while (psz) { 2527d5df9dc9SMarc Zyngier u64 val, gpsz; 2528d5df9dc9SMarc Zyngier 2529d5df9dc9SMarc Zyngier val = its_read_baser(its, baser); 2530d5df9dc9SMarc Zyngier val &= ~GITS_BASER_PAGE_SIZE_MASK; 2531d5df9dc9SMarc Zyngier 2532d5df9dc9SMarc Zyngier switch (psz) { 2533d5df9dc9SMarc Zyngier case SZ_64K: 2534d5df9dc9SMarc Zyngier gpsz = GITS_BASER_PAGE_SIZE_64K; 2535d5df9dc9SMarc Zyngier break; 2536d5df9dc9SMarc Zyngier case SZ_16K: 2537d5df9dc9SMarc Zyngier gpsz = GITS_BASER_PAGE_SIZE_16K; 2538d5df9dc9SMarc Zyngier break; 2539d5df9dc9SMarc Zyngier case SZ_4K: 2540d5df9dc9SMarc Zyngier default: 2541d5df9dc9SMarc Zyngier gpsz = GITS_BASER_PAGE_SIZE_4K; 2542d5df9dc9SMarc Zyngier break; 2543d5df9dc9SMarc Zyngier } 2544d5df9dc9SMarc Zyngier 2545d5df9dc9SMarc Zyngier gpsz >>= GITS_BASER_PAGE_SIZE_SHIFT; 2546d5df9dc9SMarc Zyngier 2547d5df9dc9SMarc Zyngier val |= FIELD_PREP(GITS_BASER_PAGE_SIZE_MASK, gpsz); 2548d5df9dc9SMarc Zyngier its_write_baser(its, baser, val); 2549d5df9dc9SMarc Zyngier 2550d5df9dc9SMarc Zyngier if (FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser->val) == gpsz) 2551d5df9dc9SMarc Zyngier break; 2552d5df9dc9SMarc Zyngier 2553d5df9dc9SMarc Zyngier switch (psz) { 2554d5df9dc9SMarc Zyngier case SZ_64K: 2555d5df9dc9SMarc Zyngier psz = SZ_16K; 2556d5df9dc9SMarc Zyngier break; 2557d5df9dc9SMarc Zyngier case SZ_16K: 2558d5df9dc9SMarc Zyngier psz = SZ_4K; 2559d5df9dc9SMarc Zyngier break; 2560d5df9dc9SMarc Zyngier case SZ_4K: 2561d5df9dc9SMarc Zyngier default: 2562d5df9dc9SMarc Zyngier return -1; 2563d5df9dc9SMarc Zyngier } 2564d5df9dc9SMarc Zyngier } 2565d5df9dc9SMarc Zyngier 2566d5df9dc9SMarc Zyngier baser->psz = psz; 2567d5df9dc9SMarc Zyngier return 0; 2568d5df9dc9SMarc Zyngier } 2569d5df9dc9SMarc Zyngier 25700e0b0f69SShanker Donthineni static int its_alloc_tables(struct its_node *its) 25711ac19ca6SMarc Zyngier { 25721ac19ca6SMarc Zyngier u64 shr = GITS_BASER_InnerShareable; 25732fd632a0SShanker Donthineni u64 cache = GITS_BASER_RaWaWb; 25749347359aSShanker Donthineni int err, i; 257594100970SRobert Richter 2576fa150019SArd Biesheuvel if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) 2577fa150019SArd Biesheuvel /* erratum 24313: ignore memory access type */ 25789347359aSShanker Donthineni cache = GITS_BASER_nCnB; 2579466b7d16SShanker Donthineni 25801ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 25812d81d425SShanker Donthineni struct its_baser *baser = its->tables + i; 25822d81d425SShanker Donthineni u64 val = its_read_baser(its, baser); 25831ac19ca6SMarc Zyngier u64 type = GITS_BASER_TYPE(val); 25843faf24eaSShanker Donthineni bool indirect = false; 2585d5df9dc9SMarc Zyngier u32 order; 25861ac19ca6SMarc Zyngier 2587d5df9dc9SMarc Zyngier if (type == GITS_BASER_TYPE_NONE) 25881ac19ca6SMarc Zyngier continue; 25891ac19ca6SMarc Zyngier 2590d5df9dc9SMarc Zyngier if (its_probe_baser_psz(its, baser)) { 2591d5df9dc9SMarc Zyngier its_free_tables(its); 2592d5df9dc9SMarc Zyngier return -ENXIO; 2593d5df9dc9SMarc Zyngier } 2594d5df9dc9SMarc Zyngier 2595d5df9dc9SMarc Zyngier order = get_order(baser->psz); 2596d5df9dc9SMarc Zyngier 2597d5df9dc9SMarc Zyngier switch (type) { 25984cacac57SMarc Zyngier case GITS_BASER_TYPE_DEVICE: 2599d5df9dc9SMarc Zyngier indirect = its_parse_indirect_baser(its, baser, &order, 2600576a8342SMarc Zyngier device_ids(its)); 26018d565748SZenghui Yu break; 26028d565748SZenghui Yu 26034cacac57SMarc Zyngier case GITS_BASER_TYPE_VCPU: 26045e516846SMarc Zyngier if (is_v4_1(its)) { 26055e516846SMarc Zyngier struct its_node *sibling; 26065e516846SMarc Zyngier 26075e516846SMarc Zyngier WARN_ON(i != 2); 26085e516846SMarc Zyngier if ((sibling = find_sibling_its(its))) { 26095e516846SMarc Zyngier *baser = sibling->tables[2]; 26105e516846SMarc Zyngier its_write_baser(its, baser, baser->val); 26115e516846SMarc Zyngier continue; 26125e516846SMarc Zyngier } 26135e516846SMarc Zyngier } 26145e516846SMarc Zyngier 2615d5df9dc9SMarc Zyngier indirect = its_parse_indirect_baser(its, baser, &order, 261632bd44dcSShanker Donthineni ITS_MAX_VPEID_BITS); 26174cacac57SMarc Zyngier break; 26184cacac57SMarc Zyngier } 2619f54b97edSMarc Zyngier 2620d5df9dc9SMarc Zyngier err = its_setup_baser(its, baser, cache, shr, order, indirect); 26219347359aSShanker Donthineni if (err < 0) { 26229347359aSShanker Donthineni its_free_tables(its); 26239347359aSShanker Donthineni return err; 262430f21363SRobert Richter } 262530f21363SRobert Richter 26269347359aSShanker Donthineni /* Update settings which will be used for next BASERn */ 26279347359aSShanker Donthineni cache = baser->val & GITS_BASER_CACHEABILITY_MASK; 26289347359aSShanker Donthineni shr = baser->val & GITS_BASER_SHAREABILITY_MASK; 26291ac19ca6SMarc Zyngier } 26301ac19ca6SMarc Zyngier 26311ac19ca6SMarc Zyngier return 0; 26321ac19ca6SMarc Zyngier } 26331ac19ca6SMarc Zyngier 26345e516846SMarc Zyngier static u64 inherit_vpe_l1_table_from_its(void) 26355e516846SMarc Zyngier { 26365e516846SMarc Zyngier struct its_node *its; 26375e516846SMarc Zyngier u64 val; 26385e516846SMarc Zyngier u32 aff; 26395e516846SMarc Zyngier 26405e516846SMarc Zyngier val = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 26415e516846SMarc Zyngier aff = compute_common_aff(val); 26425e516846SMarc Zyngier 26435e516846SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 26445e516846SMarc Zyngier u64 baser, addr; 26455e516846SMarc Zyngier 26465e516846SMarc Zyngier if (!is_v4_1(its)) 26475e516846SMarc Zyngier continue; 26485e516846SMarc Zyngier 26495e516846SMarc Zyngier if (!FIELD_GET(GITS_TYPER_SVPET, its->typer)) 26505e516846SMarc Zyngier continue; 26515e516846SMarc Zyngier 26525e516846SMarc Zyngier if (aff != compute_its_aff(its)) 26535e516846SMarc Zyngier continue; 26545e516846SMarc Zyngier 26555e516846SMarc Zyngier /* GICv4.1 guarantees that the vPE table is GITS_BASER2 */ 26565e516846SMarc Zyngier baser = its->tables[2].val; 26575e516846SMarc Zyngier if (!(baser & GITS_BASER_VALID)) 26585e516846SMarc Zyngier continue; 26595e516846SMarc Zyngier 26605e516846SMarc Zyngier /* We have a winner! */ 26618b718d40SZenghui Yu gic_data_rdist()->vpe_l1_base = its->tables[2].base; 26628b718d40SZenghui Yu 26635e516846SMarc Zyngier val = GICR_VPROPBASER_4_1_VALID; 26645e516846SMarc Zyngier if (baser & GITS_BASER_INDIRECT) 26655e516846SMarc Zyngier val |= GICR_VPROPBASER_4_1_INDIRECT; 26665e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, 26675e516846SMarc Zyngier FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser)); 26685e516846SMarc Zyngier switch (FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser)) { 26695e516846SMarc Zyngier case GIC_PAGE_SIZE_64K: 26705e516846SMarc Zyngier addr = GITS_BASER_ADDR_48_to_52(baser); 26715e516846SMarc Zyngier break; 26725e516846SMarc Zyngier default: 26735e516846SMarc Zyngier addr = baser & GENMASK_ULL(47, 12); 26745e516846SMarc Zyngier break; 26755e516846SMarc Zyngier } 26765e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, addr >> 12); 26775e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_SHAREABILITY_MASK, 26785e516846SMarc Zyngier FIELD_GET(GITS_BASER_SHAREABILITY_MASK, baser)); 26795e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_INNER_CACHEABILITY_MASK, 26805e516846SMarc Zyngier FIELD_GET(GITS_BASER_INNER_CACHEABILITY_MASK, baser)); 26815e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, GITS_BASER_NR_PAGES(baser) - 1); 26825e516846SMarc Zyngier 26835e516846SMarc Zyngier return val; 26845e516846SMarc Zyngier } 26855e516846SMarc Zyngier 26865e516846SMarc Zyngier return 0; 26875e516846SMarc Zyngier } 26885e516846SMarc Zyngier 26895e516846SMarc Zyngier static u64 inherit_vpe_l1_table_from_rd(cpumask_t **mask) 26905e516846SMarc Zyngier { 26915e516846SMarc Zyngier u32 aff; 26925e516846SMarc Zyngier u64 val; 26935e516846SMarc Zyngier int cpu; 26945e516846SMarc Zyngier 26955e516846SMarc Zyngier val = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 26965e516846SMarc Zyngier aff = compute_common_aff(val); 26975e516846SMarc Zyngier 26985e516846SMarc Zyngier for_each_possible_cpu(cpu) { 26995e516846SMarc Zyngier void __iomem *base = gic_data_rdist_cpu(cpu)->rd_base; 27005e516846SMarc Zyngier 27015e516846SMarc Zyngier if (!base || cpu == smp_processor_id()) 27025e516846SMarc Zyngier continue; 27035e516846SMarc Zyngier 27045e516846SMarc Zyngier val = gic_read_typer(base + GICR_TYPER); 27054bccf1d7SZenghui Yu if (aff != compute_common_aff(val)) 27065e516846SMarc Zyngier continue; 27075e516846SMarc Zyngier 27085e516846SMarc Zyngier /* 27095e516846SMarc Zyngier * At this point, we have a victim. This particular CPU 27105e516846SMarc Zyngier * has already booted, and has an affinity that matches 27115e516846SMarc Zyngier * ours wrt CommonLPIAff. Let's use its own VPROPBASER. 27125e516846SMarc Zyngier * Make sure we don't write the Z bit in that case. 27135e516846SMarc Zyngier */ 27145186a6ccSZenghui Yu val = gicr_read_vpropbaser(base + SZ_128K + GICR_VPROPBASER); 27155e516846SMarc Zyngier val &= ~GICR_VPROPBASER_4_1_Z; 27165e516846SMarc Zyngier 27178b718d40SZenghui Yu gic_data_rdist()->vpe_l1_base = gic_data_rdist_cpu(cpu)->vpe_l1_base; 27185e516846SMarc Zyngier *mask = gic_data_rdist_cpu(cpu)->vpe_table_mask; 27195e516846SMarc Zyngier 27205e516846SMarc Zyngier return val; 27215e516846SMarc Zyngier } 27225e516846SMarc Zyngier 27235e516846SMarc Zyngier return 0; 27245e516846SMarc Zyngier } 27255e516846SMarc Zyngier 27264e6437f1SZenghui Yu static bool allocate_vpe_l2_table(int cpu, u32 id) 27274e6437f1SZenghui Yu { 27284e6437f1SZenghui Yu void __iomem *base = gic_data_rdist_cpu(cpu)->rd_base; 2729490d332eSMarc Zyngier unsigned int psz, esz, idx, npg, gpsz; 2730490d332eSMarc Zyngier u64 val; 27314e6437f1SZenghui Yu struct page *page; 27324e6437f1SZenghui Yu __le64 *table; 27334e6437f1SZenghui Yu 27344e6437f1SZenghui Yu if (!gic_rdists->has_rvpeid) 27354e6437f1SZenghui Yu return true; 27364e6437f1SZenghui Yu 273728d160deSMarc Zyngier /* Skip non-present CPUs */ 273828d160deSMarc Zyngier if (!base) 273928d160deSMarc Zyngier return true; 274028d160deSMarc Zyngier 27415186a6ccSZenghui Yu val = gicr_read_vpropbaser(base + SZ_128K + GICR_VPROPBASER); 27424e6437f1SZenghui Yu 27434e6437f1SZenghui Yu esz = FIELD_GET(GICR_VPROPBASER_4_1_ENTRY_SIZE, val) + 1; 27444e6437f1SZenghui Yu gpsz = FIELD_GET(GICR_VPROPBASER_4_1_PAGE_SIZE, val); 27454e6437f1SZenghui Yu npg = FIELD_GET(GICR_VPROPBASER_4_1_SIZE, val) + 1; 27464e6437f1SZenghui Yu 27474e6437f1SZenghui Yu switch (gpsz) { 27484e6437f1SZenghui Yu default: 27494e6437f1SZenghui Yu WARN_ON(1); 2750df561f66SGustavo A. R. Silva fallthrough; 27514e6437f1SZenghui Yu case GIC_PAGE_SIZE_4K: 27524e6437f1SZenghui Yu psz = SZ_4K; 27534e6437f1SZenghui Yu break; 27544e6437f1SZenghui Yu case GIC_PAGE_SIZE_16K: 27554e6437f1SZenghui Yu psz = SZ_16K; 27564e6437f1SZenghui Yu break; 27574e6437f1SZenghui Yu case GIC_PAGE_SIZE_64K: 27584e6437f1SZenghui Yu psz = SZ_64K; 27594e6437f1SZenghui Yu break; 27604e6437f1SZenghui Yu } 27614e6437f1SZenghui Yu 27624e6437f1SZenghui Yu /* Don't allow vpe_id that exceeds single, flat table limit */ 27634e6437f1SZenghui Yu if (!(val & GICR_VPROPBASER_4_1_INDIRECT)) 27644e6437f1SZenghui Yu return (id < (npg * psz / (esz * SZ_8))); 27654e6437f1SZenghui Yu 27664e6437f1SZenghui Yu /* Compute 1st level table index & check if that exceeds table limit */ 27674e6437f1SZenghui Yu idx = id >> ilog2(psz / (esz * SZ_8)); 27684e6437f1SZenghui Yu if (idx >= (npg * psz / GITS_LVL1_ENTRY_SIZE)) 27694e6437f1SZenghui Yu return false; 27704e6437f1SZenghui Yu 27714e6437f1SZenghui Yu table = gic_data_rdist_cpu(cpu)->vpe_l1_base; 27724e6437f1SZenghui Yu 27734e6437f1SZenghui Yu /* Allocate memory for 2nd level table */ 27744e6437f1SZenghui Yu if (!table[idx]) { 27754e6437f1SZenghui Yu page = alloc_pages(GFP_KERNEL | __GFP_ZERO, get_order(psz)); 27764e6437f1SZenghui Yu if (!page) 27774e6437f1SZenghui Yu return false; 27784e6437f1SZenghui Yu 27794e6437f1SZenghui Yu /* Flush Lvl2 table to PoC if hw doesn't support coherency */ 27804e6437f1SZenghui Yu if (!(val & GICR_VPROPBASER_SHAREABILITY_MASK)) 27814e6437f1SZenghui Yu gic_flush_dcache_to_poc(page_address(page), psz); 27824e6437f1SZenghui Yu 27834e6437f1SZenghui Yu table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); 27844e6437f1SZenghui Yu 27854e6437f1SZenghui Yu /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ 27864e6437f1SZenghui Yu if (!(val & GICR_VPROPBASER_SHAREABILITY_MASK)) 27874e6437f1SZenghui Yu gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); 27884e6437f1SZenghui Yu 27894e6437f1SZenghui Yu /* Ensure updated table contents are visible to RD hardware */ 27904e6437f1SZenghui Yu dsb(sy); 27914e6437f1SZenghui Yu } 27924e6437f1SZenghui Yu 27934e6437f1SZenghui Yu return true; 27944e6437f1SZenghui Yu } 27954e6437f1SZenghui Yu 27965e516846SMarc Zyngier static int allocate_vpe_l1_table(void) 27975e516846SMarc Zyngier { 27985e516846SMarc Zyngier void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 27995e516846SMarc Zyngier u64 val, gpsz, npg, pa; 28005e516846SMarc Zyngier unsigned int psz = SZ_64K; 28015e516846SMarc Zyngier unsigned int np, epp, esz; 28025e516846SMarc Zyngier struct page *page; 28035e516846SMarc Zyngier 28045e516846SMarc Zyngier if (!gic_rdists->has_rvpeid) 28055e516846SMarc Zyngier return 0; 28065e516846SMarc Zyngier 28075e516846SMarc Zyngier /* 28085e516846SMarc Zyngier * if VPENDBASER.Valid is set, disable any previously programmed 28095e516846SMarc Zyngier * VPE by setting PendingLast while clearing Valid. This has the 28105e516846SMarc Zyngier * effect of making sure no doorbell will be generated and we can 28115e516846SMarc Zyngier * then safely clear VPROPBASER.Valid. 28125e516846SMarc Zyngier */ 28135186a6ccSZenghui Yu if (gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER) & GICR_VPENDBASER_Valid) 28145186a6ccSZenghui Yu gicr_write_vpendbaser(GICR_VPENDBASER_PendingLast, 28155e516846SMarc Zyngier vlpi_base + GICR_VPENDBASER); 28165e516846SMarc Zyngier 28175e516846SMarc Zyngier /* 28185e516846SMarc Zyngier * If we can inherit the configuration from another RD, let's do 28195e516846SMarc Zyngier * so. Otherwise, we have to go through the allocation process. We 28205e516846SMarc Zyngier * assume that all RDs have the exact same requirements, as 28215e516846SMarc Zyngier * nothing will work otherwise. 28225e516846SMarc Zyngier */ 28235e516846SMarc Zyngier val = inherit_vpe_l1_table_from_rd(&gic_data_rdist()->vpe_table_mask); 28245e516846SMarc Zyngier if (val & GICR_VPROPBASER_4_1_VALID) 28255e516846SMarc Zyngier goto out; 28265e516846SMarc Zyngier 2827d1bd7e0bSZenghui Yu gic_data_rdist()->vpe_table_mask = kzalloc(sizeof(cpumask_t), GFP_ATOMIC); 28285e516846SMarc Zyngier if (!gic_data_rdist()->vpe_table_mask) 28295e516846SMarc Zyngier return -ENOMEM; 28305e516846SMarc Zyngier 28315e516846SMarc Zyngier val = inherit_vpe_l1_table_from_its(); 28325e516846SMarc Zyngier if (val & GICR_VPROPBASER_4_1_VALID) 28335e516846SMarc Zyngier goto out; 28345e516846SMarc Zyngier 28355e516846SMarc Zyngier /* First probe the page size */ 28365e516846SMarc Zyngier val = FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, GIC_PAGE_SIZE_64K); 28375186a6ccSZenghui Yu gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 28385186a6ccSZenghui Yu val = gicr_read_vpropbaser(vlpi_base + GICR_VPROPBASER); 28395e516846SMarc Zyngier gpsz = FIELD_GET(GICR_VPROPBASER_4_1_PAGE_SIZE, val); 28405e516846SMarc Zyngier esz = FIELD_GET(GICR_VPROPBASER_4_1_ENTRY_SIZE, val); 28415e516846SMarc Zyngier 28425e516846SMarc Zyngier switch (gpsz) { 28435e516846SMarc Zyngier default: 28445e516846SMarc Zyngier gpsz = GIC_PAGE_SIZE_4K; 2845df561f66SGustavo A. R. Silva fallthrough; 28465e516846SMarc Zyngier case GIC_PAGE_SIZE_4K: 28475e516846SMarc Zyngier psz = SZ_4K; 28485e516846SMarc Zyngier break; 28495e516846SMarc Zyngier case GIC_PAGE_SIZE_16K: 28505e516846SMarc Zyngier psz = SZ_16K; 28515e516846SMarc Zyngier break; 28525e516846SMarc Zyngier case GIC_PAGE_SIZE_64K: 28535e516846SMarc Zyngier psz = SZ_64K; 28545e516846SMarc Zyngier break; 28555e516846SMarc Zyngier } 28565e516846SMarc Zyngier 28575e516846SMarc Zyngier /* 28585e516846SMarc Zyngier * Start populating the register from scratch, including RO fields 28595e516846SMarc Zyngier * (which we want to print in debug cases...) 28605e516846SMarc Zyngier */ 28615e516846SMarc Zyngier val = 0; 28625e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, gpsz); 28635e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_ENTRY_SIZE, esz); 28645e516846SMarc Zyngier 28655e516846SMarc Zyngier /* How many entries per GIC page? */ 28665e516846SMarc Zyngier esz++; 28675e516846SMarc Zyngier epp = psz / (esz * SZ_8); 28685e516846SMarc Zyngier 28695e516846SMarc Zyngier /* 28705e516846SMarc Zyngier * If we need more than just a single L1 page, flag the table 28715e516846SMarc Zyngier * as indirect and compute the number of required L1 pages. 28725e516846SMarc Zyngier */ 28735e516846SMarc Zyngier if (epp < ITS_MAX_VPEID) { 28745e516846SMarc Zyngier int nl2; 28755e516846SMarc Zyngier 28765e516846SMarc Zyngier val |= GICR_VPROPBASER_4_1_INDIRECT; 28775e516846SMarc Zyngier 28785e516846SMarc Zyngier /* Number of L2 pages required to cover the VPEID space */ 28795e516846SMarc Zyngier nl2 = DIV_ROUND_UP(ITS_MAX_VPEID, epp); 28805e516846SMarc Zyngier 28815e516846SMarc Zyngier /* Number of L1 pages to point to the L2 pages */ 28825e516846SMarc Zyngier npg = DIV_ROUND_UP(nl2 * SZ_8, psz); 28835e516846SMarc Zyngier } else { 28845e516846SMarc Zyngier npg = 1; 28855e516846SMarc Zyngier } 28865e516846SMarc Zyngier 2887e88bd316SZenghui Yu val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, npg - 1); 28885e516846SMarc Zyngier 28895e516846SMarc Zyngier /* Right, that's the number of CPU pages we need for L1 */ 28905e516846SMarc Zyngier np = DIV_ROUND_UP(npg * psz, PAGE_SIZE); 28915e516846SMarc Zyngier 28925e516846SMarc Zyngier pr_debug("np = %d, npg = %lld, psz = %d, epp = %d, esz = %d\n", 28935e516846SMarc Zyngier np, npg, psz, epp, esz); 2894d1bd7e0bSZenghui Yu page = alloc_pages(GFP_ATOMIC | __GFP_ZERO, get_order(np * PAGE_SIZE)); 28955e516846SMarc Zyngier if (!page) 28965e516846SMarc Zyngier return -ENOMEM; 28975e516846SMarc Zyngier 28988b718d40SZenghui Yu gic_data_rdist()->vpe_l1_base = page_address(page); 28995e516846SMarc Zyngier pa = virt_to_phys(page_address(page)); 29005e516846SMarc Zyngier WARN_ON(!IS_ALIGNED(pa, psz)); 29015e516846SMarc Zyngier 29025e516846SMarc Zyngier val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, pa >> 12); 29035e516846SMarc Zyngier val |= GICR_VPROPBASER_RaWb; 29045e516846SMarc Zyngier val |= GICR_VPROPBASER_InnerShareable; 29055e516846SMarc Zyngier val |= GICR_VPROPBASER_4_1_Z; 29065e516846SMarc Zyngier val |= GICR_VPROPBASER_4_1_VALID; 29075e516846SMarc Zyngier 29085e516846SMarc Zyngier out: 29095186a6ccSZenghui Yu gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 29105e516846SMarc Zyngier cpumask_set_cpu(smp_processor_id(), gic_data_rdist()->vpe_table_mask); 29115e516846SMarc Zyngier 29125e516846SMarc Zyngier pr_debug("CPU%d: VPROPBASER = %llx %*pbl\n", 29135e516846SMarc Zyngier smp_processor_id(), val, 29145e516846SMarc Zyngier cpumask_pr_args(gic_data_rdist()->vpe_table_mask)); 29155e516846SMarc Zyngier 29165e516846SMarc Zyngier return 0; 29175e516846SMarc Zyngier } 29185e516846SMarc Zyngier 29191ac19ca6SMarc Zyngier static int its_alloc_collections(struct its_node *its) 29201ac19ca6SMarc Zyngier { 292183559b47SMarc Zyngier int i; 292283559b47SMarc Zyngier 29236396bb22SKees Cook its->collections = kcalloc(nr_cpu_ids, sizeof(*its->collections), 29241ac19ca6SMarc Zyngier GFP_KERNEL); 29251ac19ca6SMarc Zyngier if (!its->collections) 29261ac19ca6SMarc Zyngier return -ENOMEM; 29271ac19ca6SMarc Zyngier 292883559b47SMarc Zyngier for (i = 0; i < nr_cpu_ids; i++) 292983559b47SMarc Zyngier its->collections[i].target_address = ~0ULL; 293083559b47SMarc Zyngier 29311ac19ca6SMarc Zyngier return 0; 29321ac19ca6SMarc Zyngier } 29331ac19ca6SMarc Zyngier 29347c297a2dSMarc Zyngier static struct page *its_allocate_pending_table(gfp_t gfp_flags) 29357c297a2dSMarc Zyngier { 29367c297a2dSMarc Zyngier struct page *pend_page; 2937adaab500SMarc Zyngier 29387c297a2dSMarc Zyngier pend_page = alloc_pages(gfp_flags | __GFP_ZERO, 2939adaab500SMarc Zyngier get_order(LPI_PENDBASE_SZ)); 29407c297a2dSMarc Zyngier if (!pend_page) 29417c297a2dSMarc Zyngier return NULL; 29427c297a2dSMarc Zyngier 29437c297a2dSMarc Zyngier /* Make sure the GIC will observe the zero-ed page */ 29447c297a2dSMarc Zyngier gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); 29457c297a2dSMarc Zyngier 29467c297a2dSMarc Zyngier return pend_page; 29477c297a2dSMarc Zyngier } 29487c297a2dSMarc Zyngier 29497d75bbb4SMarc Zyngier static void its_free_pending_table(struct page *pt) 29507d75bbb4SMarc Zyngier { 2951adaab500SMarc Zyngier free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ)); 29527d75bbb4SMarc Zyngier } 29537d75bbb4SMarc Zyngier 2954c6e2ccb6SMarc Zyngier /* 29555e2c9f9aSMarc Zyngier * Booting with kdump and LPIs enabled is generally fine. Any other 29565e2c9f9aSMarc Zyngier * case is wrong in the absence of firmware/EFI support. 2957c6e2ccb6SMarc Zyngier */ 2958c440a9d9SMarc Zyngier static bool enabled_lpis_allowed(void) 2959c440a9d9SMarc Zyngier { 29605e2c9f9aSMarc Zyngier phys_addr_t addr; 29615e2c9f9aSMarc Zyngier u64 val; 2962c6e2ccb6SMarc Zyngier 29635e2c9f9aSMarc Zyngier /* Check whether the property table is in a reserved region */ 29645e2c9f9aSMarc Zyngier val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); 29655e2c9f9aSMarc Zyngier addr = val & GENMASK_ULL(51, 12); 29665e2c9f9aSMarc Zyngier 29675e2c9f9aSMarc Zyngier return gic_check_reserved_range(addr, LPI_PROPBASE_SZ); 2968c440a9d9SMarc Zyngier } 2969c440a9d9SMarc Zyngier 297011e37d35SMarc Zyngier static int __init allocate_lpi_tables(void) 297111e37d35SMarc Zyngier { 2972c440a9d9SMarc Zyngier u64 val; 297311e37d35SMarc Zyngier int err, cpu; 297411e37d35SMarc Zyngier 2975c440a9d9SMarc Zyngier /* 2976c440a9d9SMarc Zyngier * If LPIs are enabled while we run this from the boot CPU, 2977c440a9d9SMarc Zyngier * flag the RD tables as pre-allocated if the stars do align. 2978c440a9d9SMarc Zyngier */ 2979c440a9d9SMarc Zyngier val = readl_relaxed(gic_data_rdist_rd_base() + GICR_CTLR); 2980c440a9d9SMarc Zyngier if ((val & GICR_CTLR_ENABLE_LPIS) && enabled_lpis_allowed()) { 2981c440a9d9SMarc Zyngier gic_rdists->flags |= (RDIST_FLAGS_RD_TABLES_PREALLOCATED | 2982c440a9d9SMarc Zyngier RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING); 2983c440a9d9SMarc Zyngier pr_info("GICv3: Using preallocated redistributor tables\n"); 2984c440a9d9SMarc Zyngier } 2985c440a9d9SMarc Zyngier 298611e37d35SMarc Zyngier err = its_setup_lpi_prop_table(); 298711e37d35SMarc Zyngier if (err) 298811e37d35SMarc Zyngier return err; 298911e37d35SMarc Zyngier 299011e37d35SMarc Zyngier /* 299111e37d35SMarc Zyngier * We allocate all the pending tables anyway, as we may have a 299211e37d35SMarc Zyngier * mix of RDs that have had LPIs enabled, and some that 299311e37d35SMarc Zyngier * don't. We'll free the unused ones as each CPU comes online. 299411e37d35SMarc Zyngier */ 299511e37d35SMarc Zyngier for_each_possible_cpu(cpu) { 299611e37d35SMarc Zyngier struct page *pend_page; 299711e37d35SMarc Zyngier 299811e37d35SMarc Zyngier pend_page = its_allocate_pending_table(GFP_NOWAIT); 299911e37d35SMarc Zyngier if (!pend_page) { 300011e37d35SMarc Zyngier pr_err("Failed to allocate PENDBASE for CPU%d\n", cpu); 300111e37d35SMarc Zyngier return -ENOMEM; 300211e37d35SMarc Zyngier } 300311e37d35SMarc Zyngier 300411e37d35SMarc Zyngier gic_data_rdist_cpu(cpu)->pend_page = pend_page; 300511e37d35SMarc Zyngier } 300611e37d35SMarc Zyngier 300711e37d35SMarc Zyngier return 0; 300811e37d35SMarc Zyngier } 300911e37d35SMarc Zyngier 3010e64fab1aSMarc Zyngier static u64 its_clear_vpend_valid(void __iomem *vlpi_base, u64 clr, u64 set) 30116479450fSHeyi Guo { 30126479450fSHeyi Guo u32 count = 1000000; /* 1s! */ 30136479450fSHeyi Guo bool clean; 30146479450fSHeyi Guo u64 val; 30156479450fSHeyi Guo 30165186a6ccSZenghui Yu val = gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 30176479450fSHeyi Guo val &= ~GICR_VPENDBASER_Valid; 3018e64fab1aSMarc Zyngier val &= ~clr; 3019e64fab1aSMarc Zyngier val |= set; 30205186a6ccSZenghui Yu gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 30216479450fSHeyi Guo 30226479450fSHeyi Guo do { 30235186a6ccSZenghui Yu val = gicr_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 30246479450fSHeyi Guo clean = !(val & GICR_VPENDBASER_Dirty); 30256479450fSHeyi Guo if (!clean) { 30266479450fSHeyi Guo count--; 30276479450fSHeyi Guo cpu_relax(); 30286479450fSHeyi Guo udelay(1); 30296479450fSHeyi Guo } 30306479450fSHeyi Guo } while (!clean && count); 30316479450fSHeyi Guo 3032e64fab1aSMarc Zyngier if (unlikely(val & GICR_VPENDBASER_Dirty)) { 3033e64fab1aSMarc Zyngier pr_err_ratelimited("ITS virtual pending table not cleaning\n"); 3034e64fab1aSMarc Zyngier val |= GICR_VPENDBASER_PendingLast; 3035e64fab1aSMarc Zyngier } 3036e64fab1aSMarc Zyngier 30376479450fSHeyi Guo return val; 30386479450fSHeyi Guo } 30396479450fSHeyi Guo 30401ac19ca6SMarc Zyngier static void its_cpu_init_lpis(void) 30411ac19ca6SMarc Zyngier { 30421ac19ca6SMarc Zyngier void __iomem *rbase = gic_data_rdist_rd_base(); 30431ac19ca6SMarc Zyngier struct page *pend_page; 304411e37d35SMarc Zyngier phys_addr_t paddr; 30451ac19ca6SMarc Zyngier u64 val, tmp; 30461ac19ca6SMarc Zyngier 304711e37d35SMarc Zyngier if (gic_data_rdist()->lpi_enabled) 30481ac19ca6SMarc Zyngier return; 30491ac19ca6SMarc Zyngier 3050c440a9d9SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 3051c440a9d9SMarc Zyngier if ((gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) && 3052c440a9d9SMarc Zyngier (val & GICR_CTLR_ENABLE_LPIS)) { 3053f842ca8eSMarc Zyngier /* 3054f842ca8eSMarc Zyngier * Check that we get the same property table on all 3055f842ca8eSMarc Zyngier * RDs. If we don't, this is hopeless. 3056f842ca8eSMarc Zyngier */ 3057f842ca8eSMarc Zyngier paddr = gicr_read_propbaser(rbase + GICR_PROPBASER); 3058f842ca8eSMarc Zyngier paddr &= GENMASK_ULL(51, 12); 3059f842ca8eSMarc Zyngier if (WARN_ON(gic_rdists->prop_table_pa != paddr)) 3060f842ca8eSMarc Zyngier add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 3061f842ca8eSMarc Zyngier 3062c440a9d9SMarc Zyngier paddr = gicr_read_pendbaser(rbase + GICR_PENDBASER); 3063c440a9d9SMarc Zyngier paddr &= GENMASK_ULL(51, 16); 3064c440a9d9SMarc Zyngier 30655e2c9f9aSMarc Zyngier WARN_ON(!gic_check_reserved_range(paddr, LPI_PENDBASE_SZ)); 3066c440a9d9SMarc Zyngier its_free_pending_table(gic_data_rdist()->pend_page); 3067c440a9d9SMarc Zyngier gic_data_rdist()->pend_page = NULL; 3068c440a9d9SMarc Zyngier 3069c440a9d9SMarc Zyngier goto out; 3070c440a9d9SMarc Zyngier } 3071c440a9d9SMarc Zyngier 307211e37d35SMarc Zyngier pend_page = gic_data_rdist()->pend_page; 30731ac19ca6SMarc Zyngier paddr = page_to_phys(pend_page); 30743fb68faeSMarc Zyngier WARN_ON(gic_reserve_range(paddr, LPI_PENDBASE_SZ)); 30751ac19ca6SMarc Zyngier 30761ac19ca6SMarc Zyngier /* set PROPBASE */ 3077e1a2e201SMarc Zyngier val = (gic_rdists->prop_table_pa | 30781ac19ca6SMarc Zyngier GICR_PROPBASER_InnerShareable | 30792fd632a0SShanker Donthineni GICR_PROPBASER_RaWaWb | 30801ac19ca6SMarc Zyngier ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); 30811ac19ca6SMarc Zyngier 30820968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 30830968a619SVladimir Murzin tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); 30841ac19ca6SMarc Zyngier 30851ac19ca6SMarc Zyngier if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { 3086241a386cSMarc Zyngier if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { 3087241a386cSMarc Zyngier /* 3088241a386cSMarc Zyngier * The HW reports non-shareable, we must 3089241a386cSMarc Zyngier * remove the cacheability attributes as 3090241a386cSMarc Zyngier * well. 3091241a386cSMarc Zyngier */ 3092241a386cSMarc Zyngier val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | 3093241a386cSMarc Zyngier GICR_PROPBASER_CACHEABILITY_MASK); 3094241a386cSMarc Zyngier val |= GICR_PROPBASER_nC; 30950968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 3096241a386cSMarc Zyngier } 30971ac19ca6SMarc Zyngier pr_info_once("GIC: using cache flushing for LPI property table\n"); 30981ac19ca6SMarc Zyngier gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; 30991ac19ca6SMarc Zyngier } 31001ac19ca6SMarc Zyngier 31011ac19ca6SMarc Zyngier /* set PENDBASE */ 31021ac19ca6SMarc Zyngier val = (page_to_phys(pend_page) | 31034ad3e363SMarc Zyngier GICR_PENDBASER_InnerShareable | 31042fd632a0SShanker Donthineni GICR_PENDBASER_RaWaWb); 31051ac19ca6SMarc Zyngier 31060968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 31070968a619SVladimir Murzin tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); 3108241a386cSMarc Zyngier 3109241a386cSMarc Zyngier if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { 3110241a386cSMarc Zyngier /* 3111241a386cSMarc Zyngier * The HW reports non-shareable, we must remove the 3112241a386cSMarc Zyngier * cacheability attributes as well. 3113241a386cSMarc Zyngier */ 3114241a386cSMarc Zyngier val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | 3115241a386cSMarc Zyngier GICR_PENDBASER_CACHEABILITY_MASK); 3116241a386cSMarc Zyngier val |= GICR_PENDBASER_nC; 31170968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 3118241a386cSMarc Zyngier } 31191ac19ca6SMarc Zyngier 31201ac19ca6SMarc Zyngier /* Enable LPIs */ 31211ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 31221ac19ca6SMarc Zyngier val |= GICR_CTLR_ENABLE_LPIS; 31231ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 31241ac19ca6SMarc Zyngier 31255e516846SMarc Zyngier if (gic_rdists->has_vlpis && !gic_rdists->has_rvpeid) { 31266479450fSHeyi Guo void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 31276479450fSHeyi Guo 31286479450fSHeyi Guo /* 31296479450fSHeyi Guo * It's possible for CPU to receive VLPIs before it is 3130a359f757SIngo Molnar * scheduled as a vPE, especially for the first CPU, and the 31316479450fSHeyi Guo * VLPI with INTID larger than 2^(IDbits+1) will be considered 31326479450fSHeyi Guo * as out of range and dropped by GIC. 31336479450fSHeyi Guo * So we initialize IDbits to known value to avoid VLPI drop. 31346479450fSHeyi Guo */ 31356479450fSHeyi Guo val = (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 31366479450fSHeyi Guo pr_debug("GICv4: CPU%d: Init IDbits to 0x%llx for GICR_VPROPBASER\n", 31376479450fSHeyi Guo smp_processor_id(), val); 31385186a6ccSZenghui Yu gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 31396479450fSHeyi Guo 31406479450fSHeyi Guo /* 31416479450fSHeyi Guo * Also clear Valid bit of GICR_VPENDBASER, in case some 31426479450fSHeyi Guo * ancient programming gets left in and has possibility of 31436479450fSHeyi Guo * corrupting memory. 31446479450fSHeyi Guo */ 3145e64fab1aSMarc Zyngier val = its_clear_vpend_valid(vlpi_base, 0, 0); 31466479450fSHeyi Guo } 31476479450fSHeyi Guo 31485e516846SMarc Zyngier if (allocate_vpe_l1_table()) { 31495e516846SMarc Zyngier /* 31505e516846SMarc Zyngier * If the allocation has failed, we're in massive trouble. 31515e516846SMarc Zyngier * Disable direct injection, and pray that no VM was 31525e516846SMarc Zyngier * already running... 31535e516846SMarc Zyngier */ 31545e516846SMarc Zyngier gic_rdists->has_rvpeid = false; 31555e516846SMarc Zyngier gic_rdists->has_vlpis = false; 31565e516846SMarc Zyngier } 31575e516846SMarc Zyngier 31581ac19ca6SMarc Zyngier /* Make sure the GIC has seen the above */ 31591ac19ca6SMarc Zyngier dsb(sy); 3160c440a9d9SMarc Zyngier out: 316111e37d35SMarc Zyngier gic_data_rdist()->lpi_enabled = true; 3162c440a9d9SMarc Zyngier pr_info("GICv3: CPU%d: using %s LPI pending table @%pa\n", 316311e37d35SMarc Zyngier smp_processor_id(), 3164c440a9d9SMarc Zyngier gic_data_rdist()->pend_page ? "allocated" : "reserved", 316511e37d35SMarc Zyngier &paddr); 31661ac19ca6SMarc Zyngier } 31671ac19ca6SMarc Zyngier 3168920181ceSDerek Basehore static void its_cpu_init_collection(struct its_node *its) 31691ac19ca6SMarc Zyngier { 3170920181ceSDerek Basehore int cpu = smp_processor_id(); 31711ac19ca6SMarc Zyngier u64 target; 31721ac19ca6SMarc Zyngier 3173fbf8f40eSGanapatrao Kulkarni /* avoid cross node collections and its mapping */ 3174fbf8f40eSGanapatrao Kulkarni if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 3175fbf8f40eSGanapatrao Kulkarni struct device_node *cpu_node; 3176fbf8f40eSGanapatrao Kulkarni 3177fbf8f40eSGanapatrao Kulkarni cpu_node = of_get_cpu_node(cpu, NULL); 3178fbf8f40eSGanapatrao Kulkarni if (its->numa_node != NUMA_NO_NODE && 3179fbf8f40eSGanapatrao Kulkarni its->numa_node != of_node_to_nid(cpu_node)) 3180920181ceSDerek Basehore return; 3181fbf8f40eSGanapatrao Kulkarni } 3182fbf8f40eSGanapatrao Kulkarni 31831ac19ca6SMarc Zyngier /* 31841ac19ca6SMarc Zyngier * We now have to bind each collection to its target 31851ac19ca6SMarc Zyngier * redistributor. 31861ac19ca6SMarc Zyngier */ 3187589ce5f4SMarc Zyngier if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { 31881ac19ca6SMarc Zyngier /* 31891ac19ca6SMarc Zyngier * This ITS wants the physical address of the 31901ac19ca6SMarc Zyngier * redistributor. 31911ac19ca6SMarc Zyngier */ 31921ac19ca6SMarc Zyngier target = gic_data_rdist()->phys_base; 31931ac19ca6SMarc Zyngier } else { 3194920181ceSDerek Basehore /* This ITS wants a linear CPU number. */ 3195589ce5f4SMarc Zyngier target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 3196263fcd31SMarc Zyngier target = GICR_TYPER_CPU_NUMBER(target) << 16; 31971ac19ca6SMarc Zyngier } 31981ac19ca6SMarc Zyngier 31991ac19ca6SMarc Zyngier /* Perform collection mapping */ 32001ac19ca6SMarc Zyngier its->collections[cpu].target_address = target; 32011ac19ca6SMarc Zyngier its->collections[cpu].col_id = cpu; 32021ac19ca6SMarc Zyngier 32031ac19ca6SMarc Zyngier its_send_mapc(its, &its->collections[cpu], 1); 32041ac19ca6SMarc Zyngier its_send_invall(its, &its->collections[cpu]); 32051ac19ca6SMarc Zyngier } 32061ac19ca6SMarc Zyngier 3207920181ceSDerek Basehore static void its_cpu_init_collections(void) 3208920181ceSDerek Basehore { 3209920181ceSDerek Basehore struct its_node *its; 3210920181ceSDerek Basehore 3211a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 3212920181ceSDerek Basehore 3213920181ceSDerek Basehore list_for_each_entry(its, &its_nodes, entry) 3214920181ceSDerek Basehore its_cpu_init_collection(its); 3215920181ceSDerek Basehore 3216a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 32171ac19ca6SMarc Zyngier } 321884a6a2e7SMarc Zyngier 321984a6a2e7SMarc Zyngier static struct its_device *its_find_device(struct its_node *its, u32 dev_id) 322084a6a2e7SMarc Zyngier { 322184a6a2e7SMarc Zyngier struct its_device *its_dev = NULL, *tmp; 32223e39e8f5SMarc Zyngier unsigned long flags; 322384a6a2e7SMarc Zyngier 32243e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 322584a6a2e7SMarc Zyngier 322684a6a2e7SMarc Zyngier list_for_each_entry(tmp, &its->its_device_list, entry) { 322784a6a2e7SMarc Zyngier if (tmp->device_id == dev_id) { 322884a6a2e7SMarc Zyngier its_dev = tmp; 322984a6a2e7SMarc Zyngier break; 323084a6a2e7SMarc Zyngier } 323184a6a2e7SMarc Zyngier } 323284a6a2e7SMarc Zyngier 32333e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 323484a6a2e7SMarc Zyngier 323584a6a2e7SMarc Zyngier return its_dev; 323684a6a2e7SMarc Zyngier } 323784a6a2e7SMarc Zyngier 3238466b7d16SShanker Donthineni static struct its_baser *its_get_baser(struct its_node *its, u32 type) 3239466b7d16SShanker Donthineni { 3240466b7d16SShanker Donthineni int i; 3241466b7d16SShanker Donthineni 3242466b7d16SShanker Donthineni for (i = 0; i < GITS_BASER_NR_REGS; i++) { 3243466b7d16SShanker Donthineni if (GITS_BASER_TYPE(its->tables[i].val) == type) 3244466b7d16SShanker Donthineni return &its->tables[i]; 3245466b7d16SShanker Donthineni } 3246466b7d16SShanker Donthineni 3247466b7d16SShanker Donthineni return NULL; 3248466b7d16SShanker Donthineni } 3249466b7d16SShanker Donthineni 3250539d3782SShanker Donthineni static bool its_alloc_table_entry(struct its_node *its, 3251539d3782SShanker Donthineni struct its_baser *baser, u32 id) 32523faf24eaSShanker Donthineni { 32533faf24eaSShanker Donthineni struct page *page; 32543faf24eaSShanker Donthineni u32 esz, idx; 32553faf24eaSShanker Donthineni __le64 *table; 32563faf24eaSShanker Donthineni 32573faf24eaSShanker Donthineni /* Don't allow device id that exceeds single, flat table limit */ 32583faf24eaSShanker Donthineni esz = GITS_BASER_ENTRY_SIZE(baser->val); 32593faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_INDIRECT)) 326070cc81edSMarc Zyngier return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); 32613faf24eaSShanker Donthineni 32623faf24eaSShanker Donthineni /* Compute 1st level table index & check if that exceeds table limit */ 326370cc81edSMarc Zyngier idx = id >> ilog2(baser->psz / esz); 32643faf24eaSShanker Donthineni if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) 32653faf24eaSShanker Donthineni return false; 32663faf24eaSShanker Donthineni 32673faf24eaSShanker Donthineni table = baser->base; 32683faf24eaSShanker Donthineni 32693faf24eaSShanker Donthineni /* Allocate memory for 2nd level table */ 32703faf24eaSShanker Donthineni if (!table[idx]) { 3271539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, 3272539d3782SShanker Donthineni get_order(baser->psz)); 32733faf24eaSShanker Donthineni if (!page) 32743faf24eaSShanker Donthineni return false; 32753faf24eaSShanker Donthineni 32763faf24eaSShanker Donthineni /* Flush Lvl2 table to PoC if hw doesn't support coherency */ 32773faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 3278328191c0SVladimir Murzin gic_flush_dcache_to_poc(page_address(page), baser->psz); 32793faf24eaSShanker Donthineni 32803faf24eaSShanker Donthineni table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); 32813faf24eaSShanker Donthineni 32823faf24eaSShanker Donthineni /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ 32833faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 3284328191c0SVladimir Murzin gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); 32853faf24eaSShanker Donthineni 32863faf24eaSShanker Donthineni /* Ensure updated table contents are visible to ITS hardware */ 32873faf24eaSShanker Donthineni dsb(sy); 32883faf24eaSShanker Donthineni } 32893faf24eaSShanker Donthineni 32903faf24eaSShanker Donthineni return true; 32913faf24eaSShanker Donthineni } 32923faf24eaSShanker Donthineni 329370cc81edSMarc Zyngier static bool its_alloc_device_table(struct its_node *its, u32 dev_id) 329470cc81edSMarc Zyngier { 329570cc81edSMarc Zyngier struct its_baser *baser; 329670cc81edSMarc Zyngier 329770cc81edSMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); 329870cc81edSMarc Zyngier 329970cc81edSMarc Zyngier /* Don't allow device id that exceeds ITS hardware limit */ 330070cc81edSMarc Zyngier if (!baser) 3301576a8342SMarc Zyngier return (ilog2(dev_id) < device_ids(its)); 330270cc81edSMarc Zyngier 3303539d3782SShanker Donthineni return its_alloc_table_entry(its, baser, dev_id); 330470cc81edSMarc Zyngier } 330570cc81edSMarc Zyngier 33067d75bbb4SMarc Zyngier static bool its_alloc_vpe_table(u32 vpe_id) 33077d75bbb4SMarc Zyngier { 33087d75bbb4SMarc Zyngier struct its_node *its; 33094e6437f1SZenghui Yu int cpu; 33107d75bbb4SMarc Zyngier 33117d75bbb4SMarc Zyngier /* 33127d75bbb4SMarc Zyngier * Make sure the L2 tables are allocated on *all* v4 ITSs. We 33137d75bbb4SMarc Zyngier * could try and only do it on ITSs corresponding to devices 33147d75bbb4SMarc Zyngier * that have interrupts targeted at this VPE, but the 33157d75bbb4SMarc Zyngier * complexity becomes crazy (and you have tons of memory 33167d75bbb4SMarc Zyngier * anyway, right?). 33177d75bbb4SMarc Zyngier */ 33187d75bbb4SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 33197d75bbb4SMarc Zyngier struct its_baser *baser; 33207d75bbb4SMarc Zyngier 33210dd57fedSMarc Zyngier if (!is_v4(its)) 33227d75bbb4SMarc Zyngier continue; 33237d75bbb4SMarc Zyngier 33247d75bbb4SMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); 33257d75bbb4SMarc Zyngier if (!baser) 33267d75bbb4SMarc Zyngier return false; 33277d75bbb4SMarc Zyngier 3328539d3782SShanker Donthineni if (!its_alloc_table_entry(its, baser, vpe_id)) 33297d75bbb4SMarc Zyngier return false; 33307d75bbb4SMarc Zyngier } 33317d75bbb4SMarc Zyngier 33324e6437f1SZenghui Yu /* Non v4.1? No need to iterate RDs and go back early. */ 33334e6437f1SZenghui Yu if (!gic_rdists->has_rvpeid) 33344e6437f1SZenghui Yu return true; 33354e6437f1SZenghui Yu 33364e6437f1SZenghui Yu /* 33374e6437f1SZenghui Yu * Make sure the L2 tables are allocated for all copies of 33384e6437f1SZenghui Yu * the L1 table on *all* v4.1 RDs. 33394e6437f1SZenghui Yu */ 33404e6437f1SZenghui Yu for_each_possible_cpu(cpu) { 33414e6437f1SZenghui Yu if (!allocate_vpe_l2_table(cpu, vpe_id)) 33424e6437f1SZenghui Yu return false; 33434e6437f1SZenghui Yu } 33444e6437f1SZenghui Yu 33457d75bbb4SMarc Zyngier return true; 33467d75bbb4SMarc Zyngier } 33477d75bbb4SMarc Zyngier 334884a6a2e7SMarc Zyngier static struct its_device *its_create_device(struct its_node *its, u32 dev_id, 334993f94ea0SMarc Zyngier int nvecs, bool alloc_lpis) 335084a6a2e7SMarc Zyngier { 335184a6a2e7SMarc Zyngier struct its_device *dev; 335293f94ea0SMarc Zyngier unsigned long *lpi_map = NULL; 33533e39e8f5SMarc Zyngier unsigned long flags; 3354591e5becSMarc Zyngier u16 *col_map = NULL; 335584a6a2e7SMarc Zyngier void *itt; 335684a6a2e7SMarc Zyngier int lpi_base; 335784a6a2e7SMarc Zyngier int nr_lpis; 3358c8481267SMarc Zyngier int nr_ites; 335984a6a2e7SMarc Zyngier int sz; 336084a6a2e7SMarc Zyngier 33613faf24eaSShanker Donthineni if (!its_alloc_device_table(its, dev_id)) 3362466b7d16SShanker Donthineni return NULL; 3363466b7d16SShanker Donthineni 3364147c8f37SMarc Zyngier if (WARN_ON(!is_power_of_2(nvecs))) 3365147c8f37SMarc Zyngier nvecs = roundup_pow_of_two(nvecs); 3366147c8f37SMarc Zyngier 336784a6a2e7SMarc Zyngier dev = kzalloc(sizeof(*dev), GFP_KERNEL); 3368c8481267SMarc Zyngier /* 3369147c8f37SMarc Zyngier * Even if the device wants a single LPI, the ITT must be 3370147c8f37SMarc Zyngier * sized as a power of two (and you need at least one bit...). 3371c8481267SMarc Zyngier */ 3372147c8f37SMarc Zyngier nr_ites = max(2, nvecs); 3373ffedbf0cSMarc Zyngier sz = nr_ites * (FIELD_GET(GITS_TYPER_ITT_ENTRY_SIZE, its->typer) + 1); 337484a6a2e7SMarc Zyngier sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; 3375539d3782SShanker Donthineni itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node); 337693f94ea0SMarc Zyngier if (alloc_lpis) { 337738dd7c49SMarc Zyngier lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis); 3378591e5becSMarc Zyngier if (lpi_map) 33796396bb22SKees Cook col_map = kcalloc(nr_lpis, sizeof(*col_map), 338093f94ea0SMarc Zyngier GFP_KERNEL); 338193f94ea0SMarc Zyngier } else { 33826396bb22SKees Cook col_map = kcalloc(nr_ites, sizeof(*col_map), GFP_KERNEL); 338393f94ea0SMarc Zyngier nr_lpis = 0; 338493f94ea0SMarc Zyngier lpi_base = 0; 338593f94ea0SMarc Zyngier } 338684a6a2e7SMarc Zyngier 338793f94ea0SMarc Zyngier if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { 338884a6a2e7SMarc Zyngier kfree(dev); 338984a6a2e7SMarc Zyngier kfree(itt); 3390ff5fe886SAndy Shevchenko bitmap_free(lpi_map); 3391591e5becSMarc Zyngier kfree(col_map); 339284a6a2e7SMarc Zyngier return NULL; 339384a6a2e7SMarc Zyngier } 339484a6a2e7SMarc Zyngier 3395328191c0SVladimir Murzin gic_flush_dcache_to_poc(itt, sz); 33965a9a8915SMarc Zyngier 339784a6a2e7SMarc Zyngier dev->its = its; 339884a6a2e7SMarc Zyngier dev->itt = itt; 3399c8481267SMarc Zyngier dev->nr_ites = nr_ites; 3400591e5becSMarc Zyngier dev->event_map.lpi_map = lpi_map; 3401591e5becSMarc Zyngier dev->event_map.col_map = col_map; 3402591e5becSMarc Zyngier dev->event_map.lpi_base = lpi_base; 3403591e5becSMarc Zyngier dev->event_map.nr_lpis = nr_lpis; 340411635fa2SMarc Zyngier raw_spin_lock_init(&dev->event_map.vlpi_lock); 340584a6a2e7SMarc Zyngier dev->device_id = dev_id; 340684a6a2e7SMarc Zyngier INIT_LIST_HEAD(&dev->entry); 340784a6a2e7SMarc Zyngier 34083e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 340984a6a2e7SMarc Zyngier list_add(&dev->entry, &its->its_device_list); 34103e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 341184a6a2e7SMarc Zyngier 341284a6a2e7SMarc Zyngier /* Map device to its ITT */ 341384a6a2e7SMarc Zyngier its_send_mapd(dev, 1); 341484a6a2e7SMarc Zyngier 341584a6a2e7SMarc Zyngier return dev; 341684a6a2e7SMarc Zyngier } 341784a6a2e7SMarc Zyngier 341884a6a2e7SMarc Zyngier static void its_free_device(struct its_device *its_dev) 341984a6a2e7SMarc Zyngier { 34203e39e8f5SMarc Zyngier unsigned long flags; 34213e39e8f5SMarc Zyngier 34223e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its_dev->its->lock, flags); 342384a6a2e7SMarc Zyngier list_del(&its_dev->entry); 34243e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); 3425898aa5ceSMarc Zyngier kfree(its_dev->event_map.col_map); 342684a6a2e7SMarc Zyngier kfree(its_dev->itt); 342784a6a2e7SMarc Zyngier kfree(its_dev); 342884a6a2e7SMarc Zyngier } 3429b48ac83dSMarc Zyngier 34308208d170SMarc Zyngier static int its_alloc_device_irq(struct its_device *dev, int nvecs, irq_hw_number_t *hwirq) 3431b48ac83dSMarc Zyngier { 3432b48ac83dSMarc Zyngier int idx; 3433b48ac83dSMarc Zyngier 3434342be106SZenghui Yu /* Find a free LPI region in lpi_map and allocate them. */ 34358208d170SMarc Zyngier idx = bitmap_find_free_region(dev->event_map.lpi_map, 34368208d170SMarc Zyngier dev->event_map.nr_lpis, 34378208d170SMarc Zyngier get_count_order(nvecs)); 34388208d170SMarc Zyngier if (idx < 0) 3439b48ac83dSMarc Zyngier return -ENOSPC; 3440b48ac83dSMarc Zyngier 3441591e5becSMarc Zyngier *hwirq = dev->event_map.lpi_base + idx; 3442b48ac83dSMarc Zyngier 3443b48ac83dSMarc Zyngier return 0; 3444b48ac83dSMarc Zyngier } 3445b48ac83dSMarc Zyngier 344654456db9SMarc Zyngier static int its_msi_prepare(struct irq_domain *domain, struct device *dev, 3447b48ac83dSMarc Zyngier int nvec, msi_alloc_info_t *info) 3448b48ac83dSMarc Zyngier { 3449b48ac83dSMarc Zyngier struct its_node *its; 3450b48ac83dSMarc Zyngier struct its_device *its_dev; 345154456db9SMarc Zyngier struct msi_domain_info *msi_info; 345254456db9SMarc Zyngier u32 dev_id; 34539791ec7dSMarc Zyngier int err = 0; 3454b48ac83dSMarc Zyngier 345554456db9SMarc Zyngier /* 3456a7c90f51SJulien Grall * We ignore "dev" entirely, and rely on the dev_id that has 345754456db9SMarc Zyngier * been passed via the scratchpad. This limits this domain's 345854456db9SMarc Zyngier * usefulness to upper layers that definitely know that they 345954456db9SMarc Zyngier * are built on top of the ITS. 346054456db9SMarc Zyngier */ 346154456db9SMarc Zyngier dev_id = info->scratchpad[0].ul; 346254456db9SMarc Zyngier 346354456db9SMarc Zyngier msi_info = msi_get_domain_info(domain); 346454456db9SMarc Zyngier its = msi_info->data; 346554456db9SMarc Zyngier 346620b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi && 346720b3d54eSMarc Zyngier vpe_proxy.dev && 346820b3d54eSMarc Zyngier vpe_proxy.dev->its == its && 346920b3d54eSMarc Zyngier dev_id == vpe_proxy.dev->device_id) { 347020b3d54eSMarc Zyngier /* Bad luck. Get yourself a better implementation */ 347120b3d54eSMarc Zyngier WARN_ONCE(1, "DevId %x clashes with GICv4 VPE proxy device\n", 347220b3d54eSMarc Zyngier dev_id); 347320b3d54eSMarc Zyngier return -EINVAL; 347420b3d54eSMarc Zyngier } 347520b3d54eSMarc Zyngier 34769791ec7dSMarc Zyngier mutex_lock(&its->dev_alloc_lock); 3477f130420eSMarc Zyngier its_dev = its_find_device(its, dev_id); 3478e8137f4fSMarc Zyngier if (its_dev) { 3479e8137f4fSMarc Zyngier /* 3480e8137f4fSMarc Zyngier * We already have seen this ID, probably through 3481e8137f4fSMarc Zyngier * another alias (PCI bridge of some sort). No need to 3482e8137f4fSMarc Zyngier * create the device. 3483e8137f4fSMarc Zyngier */ 34849791ec7dSMarc Zyngier its_dev->shared = true; 3485f130420eSMarc Zyngier pr_debug("Reusing ITT for devID %x\n", dev_id); 3486e8137f4fSMarc Zyngier goto out; 3487e8137f4fSMarc Zyngier } 3488b48ac83dSMarc Zyngier 348993f94ea0SMarc Zyngier its_dev = its_create_device(its, dev_id, nvec, true); 34909791ec7dSMarc Zyngier if (!its_dev) { 34919791ec7dSMarc Zyngier err = -ENOMEM; 34929791ec7dSMarc Zyngier goto out; 34939791ec7dSMarc Zyngier } 3494b48ac83dSMarc Zyngier 34955fe71d27SMarc Zyngier if (info->flags & MSI_ALLOC_FLAGS_PROXY_DEVICE) 34965fe71d27SMarc Zyngier its_dev->shared = true; 34975fe71d27SMarc Zyngier 3498f130420eSMarc Zyngier pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); 3499e8137f4fSMarc Zyngier out: 35009791ec7dSMarc Zyngier mutex_unlock(&its->dev_alloc_lock); 3501b48ac83dSMarc Zyngier info->scratchpad[0].ptr = its_dev; 35029791ec7dSMarc Zyngier return err; 3503b48ac83dSMarc Zyngier } 3504b48ac83dSMarc Zyngier 350554456db9SMarc Zyngier static struct msi_domain_ops its_msi_domain_ops = { 350654456db9SMarc Zyngier .msi_prepare = its_msi_prepare, 350754456db9SMarc Zyngier }; 350854456db9SMarc Zyngier 3509b48ac83dSMarc Zyngier static int its_irq_gic_domain_alloc(struct irq_domain *domain, 3510b48ac83dSMarc Zyngier unsigned int virq, 3511b48ac83dSMarc Zyngier irq_hw_number_t hwirq) 3512b48ac83dSMarc Zyngier { 3513f833f57fSMarc Zyngier struct irq_fwspec fwspec; 3514b48ac83dSMarc Zyngier 3515f833f57fSMarc Zyngier if (irq_domain_get_of_node(domain->parent)) { 3516f833f57fSMarc Zyngier fwspec.fwnode = domain->parent->fwnode; 3517f833f57fSMarc Zyngier fwspec.param_count = 3; 3518f833f57fSMarc Zyngier fwspec.param[0] = GIC_IRQ_TYPE_LPI; 3519f833f57fSMarc Zyngier fwspec.param[1] = hwirq; 3520f833f57fSMarc Zyngier fwspec.param[2] = IRQ_TYPE_EDGE_RISING; 35213f010cf1STomasz Nowicki } else if (is_fwnode_irqchip(domain->parent->fwnode)) { 35223f010cf1STomasz Nowicki fwspec.fwnode = domain->parent->fwnode; 35233f010cf1STomasz Nowicki fwspec.param_count = 2; 35243f010cf1STomasz Nowicki fwspec.param[0] = hwirq; 35253f010cf1STomasz Nowicki fwspec.param[1] = IRQ_TYPE_EDGE_RISING; 3526f833f57fSMarc Zyngier } else { 3527f833f57fSMarc Zyngier return -EINVAL; 3528f833f57fSMarc Zyngier } 3529b48ac83dSMarc Zyngier 3530f833f57fSMarc Zyngier return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); 3531b48ac83dSMarc Zyngier } 3532b48ac83dSMarc Zyngier 3533b48ac83dSMarc Zyngier static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 3534b48ac83dSMarc Zyngier unsigned int nr_irqs, void *args) 3535b48ac83dSMarc Zyngier { 3536b48ac83dSMarc Zyngier msi_alloc_info_t *info = args; 3537b48ac83dSMarc Zyngier struct its_device *its_dev = info->scratchpad[0].ptr; 353835ae7df2SJulien Grall struct its_node *its = its_dev->its; 3539f0c7bacaSThomas Gleixner struct irq_data *irqd; 3540b48ac83dSMarc Zyngier irq_hw_number_t hwirq; 3541b48ac83dSMarc Zyngier int err; 3542b48ac83dSMarc Zyngier int i; 3543b48ac83dSMarc Zyngier 35448208d170SMarc Zyngier err = its_alloc_device_irq(its_dev, nr_irqs, &hwirq); 3545b48ac83dSMarc Zyngier if (err) 3546b48ac83dSMarc Zyngier return err; 3547b48ac83dSMarc Zyngier 354835ae7df2SJulien Grall err = iommu_dma_prepare_msi(info->desc, its->get_msi_base(its_dev)); 354935ae7df2SJulien Grall if (err) 355035ae7df2SJulien Grall return err; 355135ae7df2SJulien Grall 35528208d170SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 35538208d170SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, hwirq + i); 3554b48ac83dSMarc Zyngier if (err) 3555b48ac83dSMarc Zyngier return err; 3556b48ac83dSMarc Zyngier 3557b48ac83dSMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, 35588208d170SMarc Zyngier hwirq + i, &its_irq_chip, its_dev); 3559f0c7bacaSThomas Gleixner irqd = irq_get_irq_data(virq + i); 3560f0c7bacaSThomas Gleixner irqd_set_single_target(irqd); 3561f0c7bacaSThomas Gleixner irqd_set_affinity_on_activate(irqd); 3562f130420eSMarc Zyngier pr_debug("ID:%d pID:%d vID:%d\n", 35638208d170SMarc Zyngier (int)(hwirq + i - its_dev->event_map.lpi_base), 35648208d170SMarc Zyngier (int)(hwirq + i), virq + i); 3565b48ac83dSMarc Zyngier } 3566b48ac83dSMarc Zyngier 3567b48ac83dSMarc Zyngier return 0; 3568b48ac83dSMarc Zyngier } 3569b48ac83dSMarc Zyngier 357072491643SThomas Gleixner static int its_irq_domain_activate(struct irq_domain *domain, 3571702cb0a0SThomas Gleixner struct irq_data *d, bool reserve) 3572aca268dfSMarc Zyngier { 3573aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 3574aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 35750d224d35SMarc Zyngier int cpu; 3576fbf8f40eSGanapatrao Kulkarni 3577c5d6082dSMarc Zyngier cpu = its_select_cpu(d, cpu_online_mask); 3578c5d6082dSMarc Zyngier if (cpu < 0 || cpu >= nr_cpu_ids) 3579c1797b11SYang Yingliang return -EINVAL; 3580c1797b11SYang Yingliang 35812f13ff1dSMarc Zyngier its_inc_lpi_count(d, cpu); 35820d224d35SMarc Zyngier its_dev->event_map.col_map[event] = cpu; 35830d224d35SMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 3584591e5becSMarc Zyngier 3585aca268dfSMarc Zyngier /* Map the GIC IRQ and event to the device */ 35866a25ad3aSMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 358772491643SThomas Gleixner return 0; 3588aca268dfSMarc Zyngier } 3589aca268dfSMarc Zyngier 3590aca268dfSMarc Zyngier static void its_irq_domain_deactivate(struct irq_domain *domain, 3591aca268dfSMarc Zyngier struct irq_data *d) 3592aca268dfSMarc Zyngier { 3593aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 3594aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 3595aca268dfSMarc Zyngier 35962f13ff1dSMarc Zyngier its_dec_lpi_count(d, its_dev->event_map.col_map[event]); 3597aca268dfSMarc Zyngier /* Stop the delivery of interrupts */ 3598aca268dfSMarc Zyngier its_send_discard(its_dev, event); 3599aca268dfSMarc Zyngier } 3600aca268dfSMarc Zyngier 3601b48ac83dSMarc Zyngier static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, 3602b48ac83dSMarc Zyngier unsigned int nr_irqs) 3603b48ac83dSMarc Zyngier { 3604b48ac83dSMarc Zyngier struct irq_data *d = irq_domain_get_irq_data(domain, virq); 3605b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 36069791ec7dSMarc Zyngier struct its_node *its = its_dev->its; 3607b48ac83dSMarc Zyngier int i; 3608b48ac83dSMarc Zyngier 3609c9c96e30SMarc Zyngier bitmap_release_region(its_dev->event_map.lpi_map, 3610c9c96e30SMarc Zyngier its_get_event_id(irq_domain_get_irq_data(domain, virq)), 3611c9c96e30SMarc Zyngier get_count_order(nr_irqs)); 3612c9c96e30SMarc Zyngier 3613b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 3614b48ac83dSMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 3615b48ac83dSMarc Zyngier virq + i); 3616b48ac83dSMarc Zyngier /* Nuke the entry in the domain */ 36172da39949SMarc Zyngier irq_domain_reset_irq_data(data); 3618b48ac83dSMarc Zyngier } 3619b48ac83dSMarc Zyngier 36209791ec7dSMarc Zyngier mutex_lock(&its->dev_alloc_lock); 36219791ec7dSMarc Zyngier 36229791ec7dSMarc Zyngier /* 36239791ec7dSMarc Zyngier * If all interrupts have been freed, start mopping the 3624a359f757SIngo Molnar * floor. This is conditioned on the device not being shared. 36259791ec7dSMarc Zyngier */ 36269791ec7dSMarc Zyngier if (!its_dev->shared && 36279791ec7dSMarc Zyngier bitmap_empty(its_dev->event_map.lpi_map, 3628591e5becSMarc Zyngier its_dev->event_map.nr_lpis)) { 362938dd7c49SMarc Zyngier its_lpi_free(its_dev->event_map.lpi_map, 3630cf2be8baSMarc Zyngier its_dev->event_map.lpi_base, 3631cf2be8baSMarc Zyngier its_dev->event_map.nr_lpis); 3632b48ac83dSMarc Zyngier 3633b48ac83dSMarc Zyngier /* Unmap device/itt */ 3634b48ac83dSMarc Zyngier its_send_mapd(its_dev, 0); 3635b48ac83dSMarc Zyngier its_free_device(its_dev); 3636b48ac83dSMarc Zyngier } 3637b48ac83dSMarc Zyngier 36389791ec7dSMarc Zyngier mutex_unlock(&its->dev_alloc_lock); 36399791ec7dSMarc Zyngier 3640b48ac83dSMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 3641b48ac83dSMarc Zyngier } 3642b48ac83dSMarc Zyngier 3643b48ac83dSMarc Zyngier static const struct irq_domain_ops its_domain_ops = { 3644b48ac83dSMarc Zyngier .alloc = its_irq_domain_alloc, 3645b48ac83dSMarc Zyngier .free = its_irq_domain_free, 3646aca268dfSMarc Zyngier .activate = its_irq_domain_activate, 3647aca268dfSMarc Zyngier .deactivate = its_irq_domain_deactivate, 3648b48ac83dSMarc Zyngier }; 36494c21f3c2SMarc Zyngier 365020b3d54eSMarc Zyngier /* 365120b3d54eSMarc Zyngier * This is insane. 365220b3d54eSMarc Zyngier * 36530684c704SMarc Zyngier * If a GICv4.0 doesn't implement Direct LPIs (which is extremely 365420b3d54eSMarc Zyngier * likely), the only way to perform an invalidate is to use a fake 365520b3d54eSMarc Zyngier * device to issue an INV command, implying that the LPI has first 365620b3d54eSMarc Zyngier * been mapped to some event on that device. Since this is not exactly 365720b3d54eSMarc Zyngier * cheap, we try to keep that mapping around as long as possible, and 365820b3d54eSMarc Zyngier * only issue an UNMAP if we're short on available slots. 365920b3d54eSMarc Zyngier * 366020b3d54eSMarc Zyngier * Broken by design(tm). 36610684c704SMarc Zyngier * 36620684c704SMarc Zyngier * GICv4.1, on the other hand, mandates that we're able to invalidate 36630684c704SMarc Zyngier * by writing to a MMIO register. It doesn't implement the whole of 36640684c704SMarc Zyngier * DirectLPI, but that's good enough. And most of the time, we don't 36650684c704SMarc Zyngier * even have to invalidate anything, as the redistributor can be told 36660684c704SMarc Zyngier * whether to generate a doorbell or not (we thus leave it enabled, 36670684c704SMarc Zyngier * always). 366820b3d54eSMarc Zyngier */ 366920b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap_locked(struct its_vpe *vpe) 367020b3d54eSMarc Zyngier { 36710684c704SMarc Zyngier /* GICv4.1 doesn't use a proxy, so nothing to do here */ 36720684c704SMarc Zyngier if (gic_rdists->has_rvpeid) 36730684c704SMarc Zyngier return; 36740684c704SMarc Zyngier 367520b3d54eSMarc Zyngier /* Already unmapped? */ 367620b3d54eSMarc Zyngier if (vpe->vpe_proxy_event == -1) 367720b3d54eSMarc Zyngier return; 367820b3d54eSMarc Zyngier 367920b3d54eSMarc Zyngier its_send_discard(vpe_proxy.dev, vpe->vpe_proxy_event); 368020b3d54eSMarc Zyngier vpe_proxy.vpes[vpe->vpe_proxy_event] = NULL; 368120b3d54eSMarc Zyngier 368220b3d54eSMarc Zyngier /* 368320b3d54eSMarc Zyngier * We don't track empty slots at all, so let's move the 368420b3d54eSMarc Zyngier * next_victim pointer if we can quickly reuse that slot 368520b3d54eSMarc Zyngier * instead of nuking an existing entry. Not clear that this is 368620b3d54eSMarc Zyngier * always a win though, and this might just generate a ripple 368720b3d54eSMarc Zyngier * effect... Let's just hope VPEs don't migrate too often. 368820b3d54eSMarc Zyngier */ 368920b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 369020b3d54eSMarc Zyngier vpe_proxy.next_victim = vpe->vpe_proxy_event; 369120b3d54eSMarc Zyngier 369220b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 369320b3d54eSMarc Zyngier } 369420b3d54eSMarc Zyngier 369520b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap(struct its_vpe *vpe) 369620b3d54eSMarc Zyngier { 36970684c704SMarc Zyngier /* GICv4.1 doesn't use a proxy, so nothing to do here */ 36980684c704SMarc Zyngier if (gic_rdists->has_rvpeid) 36990684c704SMarc Zyngier return; 37000684c704SMarc Zyngier 370120b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi) { 370220b3d54eSMarc Zyngier unsigned long flags; 370320b3d54eSMarc Zyngier 370420b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 370520b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe); 370620b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 370720b3d54eSMarc Zyngier } 370820b3d54eSMarc Zyngier } 370920b3d54eSMarc Zyngier 371020b3d54eSMarc Zyngier static void its_vpe_db_proxy_map_locked(struct its_vpe *vpe) 371120b3d54eSMarc Zyngier { 37120684c704SMarc Zyngier /* GICv4.1 doesn't use a proxy, so nothing to do here */ 37130684c704SMarc Zyngier if (gic_rdists->has_rvpeid) 37140684c704SMarc Zyngier return; 37150684c704SMarc Zyngier 371620b3d54eSMarc Zyngier /* Already mapped? */ 371720b3d54eSMarc Zyngier if (vpe->vpe_proxy_event != -1) 371820b3d54eSMarc Zyngier return; 371920b3d54eSMarc Zyngier 372020b3d54eSMarc Zyngier /* This slot was already allocated. Kick the other VPE out. */ 372120b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 372220b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe_proxy.vpes[vpe_proxy.next_victim]); 372320b3d54eSMarc Zyngier 372420b3d54eSMarc Zyngier /* Map the new VPE instead */ 372520b3d54eSMarc Zyngier vpe_proxy.vpes[vpe_proxy.next_victim] = vpe; 372620b3d54eSMarc Zyngier vpe->vpe_proxy_event = vpe_proxy.next_victim; 372720b3d54eSMarc Zyngier vpe_proxy.next_victim = (vpe_proxy.next_victim + 1) % vpe_proxy.dev->nr_ites; 372820b3d54eSMarc Zyngier 372920b3d54eSMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = vpe->col_idx; 373020b3d54eSMarc Zyngier its_send_mapti(vpe_proxy.dev, vpe->vpe_db_lpi, vpe->vpe_proxy_event); 373120b3d54eSMarc Zyngier } 373220b3d54eSMarc Zyngier 3733958b90d1SMarc Zyngier static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) 3734958b90d1SMarc Zyngier { 3735958b90d1SMarc Zyngier unsigned long flags; 3736958b90d1SMarc Zyngier struct its_collection *target_col; 3737958b90d1SMarc Zyngier 37380684c704SMarc Zyngier /* GICv4.1 doesn't use a proxy, so nothing to do here */ 37390684c704SMarc Zyngier if (gic_rdists->has_rvpeid) 37400684c704SMarc Zyngier return; 37410684c704SMarc Zyngier 3742958b90d1SMarc Zyngier if (gic_rdists->has_direct_lpi) { 3743958b90d1SMarc Zyngier void __iomem *rdbase; 3744958b90d1SMarc Zyngier 3745958b90d1SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; 3746958b90d1SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); 37472f4f064bSMarc Zyngier wait_for_syncr(rdbase); 3748958b90d1SMarc Zyngier 3749958b90d1SMarc Zyngier return; 3750958b90d1SMarc Zyngier } 3751958b90d1SMarc Zyngier 3752958b90d1SMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 3753958b90d1SMarc Zyngier 3754958b90d1SMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 3755958b90d1SMarc Zyngier 3756958b90d1SMarc Zyngier target_col = &vpe_proxy.dev->its->collections[to]; 3757958b90d1SMarc Zyngier its_send_movi(vpe_proxy.dev, target_col, vpe->vpe_proxy_event); 3758958b90d1SMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = to; 3759958b90d1SMarc Zyngier 3760958b90d1SMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 3761958b90d1SMarc Zyngier } 3762958b90d1SMarc Zyngier 37633171a47aSMarc Zyngier static int its_vpe_set_affinity(struct irq_data *d, 37643171a47aSMarc Zyngier const struct cpumask *mask_val, 37653171a47aSMarc Zyngier bool force) 37663171a47aSMarc Zyngier { 37673171a47aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 3768dd3f050aSMarc Zyngier int from, cpu = cpumask_first(mask_val); 3769f3a05921SMarc Zyngier unsigned long flags; 37703171a47aSMarc Zyngier 37713171a47aSMarc Zyngier /* 37723171a47aSMarc Zyngier * Changing affinity is mega expensive, so let's be as lazy as 377320b3d54eSMarc Zyngier * we can and only do it if we really have to. Also, if mapped 3774958b90d1SMarc Zyngier * into the proxy device, we need to move the doorbell 3775958b90d1SMarc Zyngier * interrupt to its new location. 3776f3a05921SMarc Zyngier * 3777f3a05921SMarc Zyngier * Another thing is that changing the affinity of a vPE affects 3778f3a05921SMarc Zyngier * *other interrupts* such as all the vLPIs that are routed to 3779f3a05921SMarc Zyngier * this vPE. This means that the irq_desc lock is not enough to 3780f3a05921SMarc Zyngier * protect us, and that we must ensure nobody samples vpe->col_idx 3781f3a05921SMarc Zyngier * during the update, hence the lock below which must also be 3782f3a05921SMarc Zyngier * taken on any vLPI handling path that evaluates vpe->col_idx. 37833171a47aSMarc Zyngier */ 3784f3a05921SMarc Zyngier from = vpe_to_cpuid_lock(vpe, &flags); 3785f3a05921SMarc Zyngier if (from == cpu) 3786dd3f050aSMarc Zyngier goto out; 3787958b90d1SMarc Zyngier 37883171a47aSMarc Zyngier vpe->col_idx = cpu; 3789dd3f050aSMarc Zyngier 3790dd3f050aSMarc Zyngier /* 3791dd3f050aSMarc Zyngier * GICv4.1 allows us to skip VMOVP if moving to a cpu whose RD 3792dd3f050aSMarc Zyngier * is sharing its VPE table with the current one. 3793dd3f050aSMarc Zyngier */ 3794dd3f050aSMarc Zyngier if (gic_data_rdist_cpu(cpu)->vpe_table_mask && 3795dd3f050aSMarc Zyngier cpumask_test_cpu(from, gic_data_rdist_cpu(cpu)->vpe_table_mask)) 3796dd3f050aSMarc Zyngier goto out; 3797dd3f050aSMarc Zyngier 37983171a47aSMarc Zyngier its_send_vmovp(vpe); 3799958b90d1SMarc Zyngier its_vpe_db_proxy_move(vpe, from, cpu); 38003171a47aSMarc Zyngier 3801dd3f050aSMarc Zyngier out: 380244c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 3803f3a05921SMarc Zyngier vpe_to_cpuid_unlock(vpe, flags); 380444c4c25eSMarc Zyngier 38053171a47aSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 38063171a47aSMarc Zyngier } 38073171a47aSMarc Zyngier 380896806229SMarc Zyngier static void its_wait_vpt_parse_complete(void) 380996806229SMarc Zyngier { 381096806229SMarc Zyngier void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 381196806229SMarc Zyngier u64 val; 381296806229SMarc Zyngier 381396806229SMarc Zyngier if (!gic_rdists->has_vpend_valid_dirty) 381496806229SMarc Zyngier return; 381596806229SMarc Zyngier 381631dbb6b1SZenghui Yu WARN_ON_ONCE(readq_relaxed_poll_timeout_atomic(vlpi_base + GICR_VPENDBASER, 381796806229SMarc Zyngier val, 381896806229SMarc Zyngier !(val & GICR_VPENDBASER_Dirty), 38190b394982SShenming Lu 1, 500)); 382096806229SMarc Zyngier } 382196806229SMarc Zyngier 3822e643d803SMarc Zyngier static void its_vpe_schedule(struct its_vpe *vpe) 3823e643d803SMarc Zyngier { 382450c33097SRobin Murphy void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 3825e643d803SMarc Zyngier u64 val; 3826e643d803SMarc Zyngier 3827e643d803SMarc Zyngier /* Schedule the VPE */ 3828e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & 3829e643d803SMarc Zyngier GENMASK_ULL(51, 12); 3830e643d803SMarc Zyngier val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 3831e643d803SMarc Zyngier val |= GICR_VPROPBASER_RaWb; 3832e643d803SMarc Zyngier val |= GICR_VPROPBASER_InnerShareable; 38335186a6ccSZenghui Yu gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 3834e643d803SMarc Zyngier 3835e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->vpt_page)) & 3836e643d803SMarc Zyngier GENMASK_ULL(51, 16); 3837e643d803SMarc Zyngier val |= GICR_VPENDBASER_RaWaWb; 3838b2cb11f4SHeyi Guo val |= GICR_VPENDBASER_InnerShareable; 3839e643d803SMarc Zyngier /* 3840e643d803SMarc Zyngier * There is no good way of finding out if the pending table is 3841e643d803SMarc Zyngier * empty as we can race against the doorbell interrupt very 3842e643d803SMarc Zyngier * easily. So in the end, vpe->pending_last is only an 3843e643d803SMarc Zyngier * indication that the vcpu has something pending, not one 3844e643d803SMarc Zyngier * that the pending table is empty. A good implementation 3845e643d803SMarc Zyngier * would be able to read its coarse map pretty quickly anyway, 3846e643d803SMarc Zyngier * making this a tolerable issue. 3847e643d803SMarc Zyngier */ 3848e643d803SMarc Zyngier val |= GICR_VPENDBASER_PendingLast; 3849e643d803SMarc Zyngier val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; 3850e643d803SMarc Zyngier val |= GICR_VPENDBASER_Valid; 38515186a6ccSZenghui Yu gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 3852e643d803SMarc Zyngier } 3853e643d803SMarc Zyngier 3854e643d803SMarc Zyngier static void its_vpe_deschedule(struct its_vpe *vpe) 3855e643d803SMarc Zyngier { 385650c33097SRobin Murphy void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 3857e643d803SMarc Zyngier u64 val; 3858e643d803SMarc Zyngier 3859e64fab1aSMarc Zyngier val = its_clear_vpend_valid(vlpi_base, 0, 0); 3860e643d803SMarc Zyngier 3861e643d803SMarc Zyngier vpe->idai = !!(val & GICR_VPENDBASER_IDAI); 3862e643d803SMarc Zyngier vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); 3863e643d803SMarc Zyngier } 3864e643d803SMarc Zyngier 386540619a2eSMarc Zyngier static void its_vpe_invall(struct its_vpe *vpe) 386640619a2eSMarc Zyngier { 386740619a2eSMarc Zyngier struct its_node *its; 386840619a2eSMarc Zyngier 386940619a2eSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 38700dd57fedSMarc Zyngier if (!is_v4(its)) 387140619a2eSMarc Zyngier continue; 387240619a2eSMarc Zyngier 38732247e1bfSMarc Zyngier if (its_list_map && !vpe->its_vm->vlpi_count[its->list_nr]) 38742247e1bfSMarc Zyngier continue; 38752247e1bfSMarc Zyngier 38763c1cceebSMarc Zyngier /* 38773c1cceebSMarc Zyngier * Sending a VINVALL to a single ITS is enough, as all 38783c1cceebSMarc Zyngier * we need is to reach the redistributors. 38793c1cceebSMarc Zyngier */ 388040619a2eSMarc Zyngier its_send_vinvall(its, vpe); 38813c1cceebSMarc Zyngier return; 388240619a2eSMarc Zyngier } 388340619a2eSMarc Zyngier } 388440619a2eSMarc Zyngier 3885e643d803SMarc Zyngier static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 3886e643d803SMarc Zyngier { 3887e643d803SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 3888e643d803SMarc Zyngier struct its_cmd_info *info = vcpu_info; 3889e643d803SMarc Zyngier 3890e643d803SMarc Zyngier switch (info->cmd_type) { 3891e643d803SMarc Zyngier case SCHEDULE_VPE: 3892e643d803SMarc Zyngier its_vpe_schedule(vpe); 3893e643d803SMarc Zyngier return 0; 3894e643d803SMarc Zyngier 3895e643d803SMarc Zyngier case DESCHEDULE_VPE: 3896e643d803SMarc Zyngier its_vpe_deschedule(vpe); 3897e643d803SMarc Zyngier return 0; 3898e643d803SMarc Zyngier 389957e3cebdSShenming Lu case COMMIT_VPE: 390057e3cebdSShenming Lu its_wait_vpt_parse_complete(); 390157e3cebdSShenming Lu return 0; 390257e3cebdSShenming Lu 39035e2f7642SMarc Zyngier case INVALL_VPE: 390440619a2eSMarc Zyngier its_vpe_invall(vpe); 39055e2f7642SMarc Zyngier return 0; 39065e2f7642SMarc Zyngier 3907e643d803SMarc Zyngier default: 3908e643d803SMarc Zyngier return -EINVAL; 3909e643d803SMarc Zyngier } 3910e643d803SMarc Zyngier } 3911e643d803SMarc Zyngier 391220b3d54eSMarc Zyngier static void its_vpe_send_cmd(struct its_vpe *vpe, 391320b3d54eSMarc Zyngier void (*cmd)(struct its_device *, u32)) 391420b3d54eSMarc Zyngier { 391520b3d54eSMarc Zyngier unsigned long flags; 391620b3d54eSMarc Zyngier 391720b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 391820b3d54eSMarc Zyngier 391920b3d54eSMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 392020b3d54eSMarc Zyngier cmd(vpe_proxy.dev, vpe->vpe_proxy_event); 392120b3d54eSMarc Zyngier 392220b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 392320b3d54eSMarc Zyngier } 392420b3d54eSMarc Zyngier 3925f6a91da7SMarc Zyngier static void its_vpe_send_inv(struct irq_data *d) 3926f6a91da7SMarc Zyngier { 3927f6a91da7SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 392820b3d54eSMarc Zyngier 392920b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 3930f6a91da7SMarc Zyngier void __iomem *rdbase; 3931f6a91da7SMarc Zyngier 3932425c09beSMarc Zyngier /* Target the redistributor this VPE is currently known on */ 39339058a4e9SMarc Zyngier raw_spin_lock(&gic_data_rdist_cpu(vpe->col_idx)->rd_lock); 3934f6a91da7SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 3935425c09beSMarc Zyngier gic_write_lpir(d->parent_data->hwirq, rdbase + GICR_INVLPIR); 39362f4f064bSMarc Zyngier wait_for_syncr(rdbase); 39379058a4e9SMarc Zyngier raw_spin_unlock(&gic_data_rdist_cpu(vpe->col_idx)->rd_lock); 393820b3d54eSMarc Zyngier } else { 393920b3d54eSMarc Zyngier its_vpe_send_cmd(vpe, its_send_inv); 394020b3d54eSMarc Zyngier } 3941f6a91da7SMarc Zyngier } 3942f6a91da7SMarc Zyngier 3943f6a91da7SMarc Zyngier static void its_vpe_mask_irq(struct irq_data *d) 3944f6a91da7SMarc Zyngier { 3945f6a91da7SMarc Zyngier /* 3946f6a91da7SMarc Zyngier * We need to unmask the LPI, which is described by the parent 3947f6a91da7SMarc Zyngier * irq_data. Instead of calling into the parent (which won't 3948f6a91da7SMarc Zyngier * exactly do the right thing, let's simply use the 3949f6a91da7SMarc Zyngier * parent_data pointer. Yes, I'm naughty. 3950f6a91da7SMarc Zyngier */ 3951f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); 3952f6a91da7SMarc Zyngier its_vpe_send_inv(d); 3953f6a91da7SMarc Zyngier } 3954f6a91da7SMarc Zyngier 3955f6a91da7SMarc Zyngier static void its_vpe_unmask_irq(struct irq_data *d) 3956f6a91da7SMarc Zyngier { 3957f6a91da7SMarc Zyngier /* Same hack as above... */ 3958f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); 3959f6a91da7SMarc Zyngier its_vpe_send_inv(d); 3960f6a91da7SMarc Zyngier } 3961f6a91da7SMarc Zyngier 3962e57a3e28SMarc Zyngier static int its_vpe_set_irqchip_state(struct irq_data *d, 3963e57a3e28SMarc Zyngier enum irqchip_irq_state which, 3964e57a3e28SMarc Zyngier bool state) 3965e57a3e28SMarc Zyngier { 3966e57a3e28SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 3967e57a3e28SMarc Zyngier 3968e57a3e28SMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 3969e57a3e28SMarc Zyngier return -EINVAL; 3970e57a3e28SMarc Zyngier 3971e57a3e28SMarc Zyngier if (gic_rdists->has_direct_lpi) { 3972e57a3e28SMarc Zyngier void __iomem *rdbase; 3973e57a3e28SMarc Zyngier 3974e57a3e28SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 3975e57a3e28SMarc Zyngier if (state) { 3976e57a3e28SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); 3977e57a3e28SMarc Zyngier } else { 3978e57a3e28SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); 39792f4f064bSMarc Zyngier wait_for_syncr(rdbase); 3980e57a3e28SMarc Zyngier } 3981e57a3e28SMarc Zyngier } else { 3982e57a3e28SMarc Zyngier if (state) 3983e57a3e28SMarc Zyngier its_vpe_send_cmd(vpe, its_send_int); 3984e57a3e28SMarc Zyngier else 3985e57a3e28SMarc Zyngier its_vpe_send_cmd(vpe, its_send_clear); 3986e57a3e28SMarc Zyngier } 3987e57a3e28SMarc Zyngier 3988e57a3e28SMarc Zyngier return 0; 3989e57a3e28SMarc Zyngier } 3990e57a3e28SMarc Zyngier 39917809f701SMarc Zyngier static int its_vpe_retrigger(struct irq_data *d) 39927809f701SMarc Zyngier { 39937809f701SMarc Zyngier return !its_vpe_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); 39947809f701SMarc Zyngier } 39957809f701SMarc Zyngier 39968fff27aeSMarc Zyngier static struct irq_chip its_vpe_irq_chip = { 39978fff27aeSMarc Zyngier .name = "GICv4-vpe", 3998f6a91da7SMarc Zyngier .irq_mask = its_vpe_mask_irq, 3999f6a91da7SMarc Zyngier .irq_unmask = its_vpe_unmask_irq, 4000f6a91da7SMarc Zyngier .irq_eoi = irq_chip_eoi_parent, 40013171a47aSMarc Zyngier .irq_set_affinity = its_vpe_set_affinity, 40027809f701SMarc Zyngier .irq_retrigger = its_vpe_retrigger, 4003e57a3e28SMarc Zyngier .irq_set_irqchip_state = its_vpe_set_irqchip_state, 4004e643d803SMarc Zyngier .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, 40058fff27aeSMarc Zyngier }; 40068fff27aeSMarc Zyngier 4007d97c97baSMarc Zyngier static struct its_node *find_4_1_its(void) 4008d97c97baSMarc Zyngier { 4009d97c97baSMarc Zyngier static struct its_node *its = NULL; 4010d97c97baSMarc Zyngier 4011d97c97baSMarc Zyngier if (!its) { 4012d97c97baSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 4013d97c97baSMarc Zyngier if (is_v4_1(its)) 4014d97c97baSMarc Zyngier return its; 4015d97c97baSMarc Zyngier } 4016d97c97baSMarc Zyngier 4017d97c97baSMarc Zyngier /* Oops? */ 4018d97c97baSMarc Zyngier its = NULL; 4019d97c97baSMarc Zyngier } 4020d97c97baSMarc Zyngier 4021d97c97baSMarc Zyngier return its; 4022d97c97baSMarc Zyngier } 4023d97c97baSMarc Zyngier 4024d97c97baSMarc Zyngier static void its_vpe_4_1_send_inv(struct irq_data *d) 4025d97c97baSMarc Zyngier { 4026d97c97baSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 4027d97c97baSMarc Zyngier struct its_node *its; 4028d97c97baSMarc Zyngier 4029d97c97baSMarc Zyngier /* 4030d97c97baSMarc Zyngier * GICv4.1 wants doorbells to be invalidated using the 4031d97c97baSMarc Zyngier * INVDB command in order to be broadcast to all RDs. Send 4032d97c97baSMarc Zyngier * it to the first valid ITS, and let the HW do its magic. 4033d97c97baSMarc Zyngier */ 4034d97c97baSMarc Zyngier its = find_4_1_its(); 4035d97c97baSMarc Zyngier if (its) 4036d97c97baSMarc Zyngier its_send_invdb(its, vpe); 4037d97c97baSMarc Zyngier } 4038d97c97baSMarc Zyngier 4039d97c97baSMarc Zyngier static void its_vpe_4_1_mask_irq(struct irq_data *d) 4040d97c97baSMarc Zyngier { 4041d97c97baSMarc Zyngier lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); 4042d97c97baSMarc Zyngier its_vpe_4_1_send_inv(d); 4043d97c97baSMarc Zyngier } 4044d97c97baSMarc Zyngier 4045d97c97baSMarc Zyngier static void its_vpe_4_1_unmask_irq(struct irq_data *d) 4046d97c97baSMarc Zyngier { 4047d97c97baSMarc Zyngier lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); 4048d97c97baSMarc Zyngier its_vpe_4_1_send_inv(d); 4049d97c97baSMarc Zyngier } 4050d97c97baSMarc Zyngier 405191bf6395SMarc Zyngier static void its_vpe_4_1_schedule(struct its_vpe *vpe, 405291bf6395SMarc Zyngier struct its_cmd_info *info) 405391bf6395SMarc Zyngier { 405491bf6395SMarc Zyngier void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 405591bf6395SMarc Zyngier u64 val = 0; 405691bf6395SMarc Zyngier 405791bf6395SMarc Zyngier /* Schedule the VPE */ 405891bf6395SMarc Zyngier val |= GICR_VPENDBASER_Valid; 405991bf6395SMarc Zyngier val |= info->g0en ? GICR_VPENDBASER_4_1_VGRP0EN : 0; 406091bf6395SMarc Zyngier val |= info->g1en ? GICR_VPENDBASER_4_1_VGRP1EN : 0; 406191bf6395SMarc Zyngier val |= FIELD_PREP(GICR_VPENDBASER_4_1_VPEID, vpe->vpe_id); 406291bf6395SMarc Zyngier 40635186a6ccSZenghui Yu gicr_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 406491bf6395SMarc Zyngier } 406591bf6395SMarc Zyngier 4066e64fab1aSMarc Zyngier static void its_vpe_4_1_deschedule(struct its_vpe *vpe, 4067e64fab1aSMarc Zyngier struct its_cmd_info *info) 4068e64fab1aSMarc Zyngier { 4069e64fab1aSMarc Zyngier void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 4070e64fab1aSMarc Zyngier u64 val; 4071e64fab1aSMarc Zyngier 4072e64fab1aSMarc Zyngier if (info->req_db) { 4073a3f574cdSMarc Zyngier unsigned long flags; 4074a3f574cdSMarc Zyngier 4075e64fab1aSMarc Zyngier /* 4076e64fab1aSMarc Zyngier * vPE is going to block: make the vPE non-resident with 4077e64fab1aSMarc Zyngier * PendingLast clear and DB set. The GIC guarantees that if 4078e64fab1aSMarc Zyngier * we read-back PendingLast clear, then a doorbell will be 4079e64fab1aSMarc Zyngier * delivered when an interrupt comes. 4080a3f574cdSMarc Zyngier * 4081a3f574cdSMarc Zyngier * Note the locking to deal with the concurrent update of 4082a3f574cdSMarc Zyngier * pending_last from the doorbell interrupt handler that can 4083a3f574cdSMarc Zyngier * run concurrently. 4084e64fab1aSMarc Zyngier */ 4085a3f574cdSMarc Zyngier raw_spin_lock_irqsave(&vpe->vpe_lock, flags); 4086e64fab1aSMarc Zyngier val = its_clear_vpend_valid(vlpi_base, 4087e64fab1aSMarc Zyngier GICR_VPENDBASER_PendingLast, 4088e64fab1aSMarc Zyngier GICR_VPENDBASER_4_1_DB); 4089e64fab1aSMarc Zyngier vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); 4090a3f574cdSMarc Zyngier raw_spin_unlock_irqrestore(&vpe->vpe_lock, flags); 4091e64fab1aSMarc Zyngier } else { 4092e64fab1aSMarc Zyngier /* 4093e64fab1aSMarc Zyngier * We're not blocking, so just make the vPE non-resident 4094e64fab1aSMarc Zyngier * with PendingLast set, indicating that we'll be back. 4095e64fab1aSMarc Zyngier */ 4096e64fab1aSMarc Zyngier val = its_clear_vpend_valid(vlpi_base, 4097e64fab1aSMarc Zyngier 0, 4098e64fab1aSMarc Zyngier GICR_VPENDBASER_PendingLast); 4099e64fab1aSMarc Zyngier vpe->pending_last = true; 4100e64fab1aSMarc Zyngier } 4101e64fab1aSMarc Zyngier } 4102e64fab1aSMarc Zyngier 4103b4a4bd0fSMarc Zyngier static void its_vpe_4_1_invall(struct its_vpe *vpe) 4104b4a4bd0fSMarc Zyngier { 4105b4a4bd0fSMarc Zyngier void __iomem *rdbase; 41063af9571cSZenghui Yu unsigned long flags; 4107b4a4bd0fSMarc Zyngier u64 val; 41083af9571cSZenghui Yu int cpu; 4109b4a4bd0fSMarc Zyngier 4110b4a4bd0fSMarc Zyngier val = GICR_INVALLR_V; 4111b4a4bd0fSMarc Zyngier val |= FIELD_PREP(GICR_INVALLR_VPEID, vpe->vpe_id); 4112b4a4bd0fSMarc Zyngier 4113b4a4bd0fSMarc Zyngier /* Target the redistributor this vPE is currently known on */ 41143af9571cSZenghui Yu cpu = vpe_to_cpuid_lock(vpe, &flags); 41153af9571cSZenghui Yu raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); 41163af9571cSZenghui Yu rdbase = per_cpu_ptr(gic_rdists->rdist, cpu)->rd_base; 4117b4a4bd0fSMarc Zyngier gic_write_lpir(val, rdbase + GICR_INVALLR); 4118b978c25fSZenghui Yu 4119b978c25fSZenghui Yu wait_for_syncr(rdbase); 41203af9571cSZenghui Yu raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); 41213af9571cSZenghui Yu vpe_to_cpuid_unlock(vpe, flags); 4122b4a4bd0fSMarc Zyngier } 4123b4a4bd0fSMarc Zyngier 412429c647f3SMarc Zyngier static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 412529c647f3SMarc Zyngier { 412691bf6395SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 412729c647f3SMarc Zyngier struct its_cmd_info *info = vcpu_info; 412829c647f3SMarc Zyngier 412929c647f3SMarc Zyngier switch (info->cmd_type) { 413029c647f3SMarc Zyngier case SCHEDULE_VPE: 413191bf6395SMarc Zyngier its_vpe_4_1_schedule(vpe, info); 413229c647f3SMarc Zyngier return 0; 413329c647f3SMarc Zyngier 413429c647f3SMarc Zyngier case DESCHEDULE_VPE: 4135e64fab1aSMarc Zyngier its_vpe_4_1_deschedule(vpe, info); 413629c647f3SMarc Zyngier return 0; 413729c647f3SMarc Zyngier 413857e3cebdSShenming Lu case COMMIT_VPE: 413957e3cebdSShenming Lu its_wait_vpt_parse_complete(); 414057e3cebdSShenming Lu return 0; 414157e3cebdSShenming Lu 414229c647f3SMarc Zyngier case INVALL_VPE: 4143b4a4bd0fSMarc Zyngier its_vpe_4_1_invall(vpe); 414429c647f3SMarc Zyngier return 0; 414529c647f3SMarc Zyngier 414629c647f3SMarc Zyngier default: 414729c647f3SMarc Zyngier return -EINVAL; 414829c647f3SMarc Zyngier } 414929c647f3SMarc Zyngier } 415029c647f3SMarc Zyngier 415129c647f3SMarc Zyngier static struct irq_chip its_vpe_4_1_irq_chip = { 415229c647f3SMarc Zyngier .name = "GICv4.1-vpe", 4153d97c97baSMarc Zyngier .irq_mask = its_vpe_4_1_mask_irq, 4154d97c97baSMarc Zyngier .irq_unmask = its_vpe_4_1_unmask_irq, 415529c647f3SMarc Zyngier .irq_eoi = irq_chip_eoi_parent, 415629c647f3SMarc Zyngier .irq_set_affinity = its_vpe_set_affinity, 415729c647f3SMarc Zyngier .irq_set_vcpu_affinity = its_vpe_4_1_set_vcpu_affinity, 415829c647f3SMarc Zyngier }; 415929c647f3SMarc Zyngier 4160e252cf8aSMarc Zyngier static void its_configure_sgi(struct irq_data *d, bool clear) 4161e252cf8aSMarc Zyngier { 4162e252cf8aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 4163e252cf8aSMarc Zyngier struct its_cmd_desc desc; 4164e252cf8aSMarc Zyngier 4165e252cf8aSMarc Zyngier desc.its_vsgi_cmd.vpe = vpe; 4166e252cf8aSMarc Zyngier desc.its_vsgi_cmd.sgi = d->hwirq; 4167e252cf8aSMarc Zyngier desc.its_vsgi_cmd.priority = vpe->sgi_config[d->hwirq].priority; 4168e252cf8aSMarc Zyngier desc.its_vsgi_cmd.enable = vpe->sgi_config[d->hwirq].enabled; 4169e252cf8aSMarc Zyngier desc.its_vsgi_cmd.group = vpe->sgi_config[d->hwirq].group; 4170e252cf8aSMarc Zyngier desc.its_vsgi_cmd.clear = clear; 4171e252cf8aSMarc Zyngier 4172e252cf8aSMarc Zyngier /* 4173e252cf8aSMarc Zyngier * GICv4.1 allows us to send VSGI commands to any ITS as long as the 4174e252cf8aSMarc Zyngier * destination VPE is mapped there. Since we map them eagerly at 4175e252cf8aSMarc Zyngier * activation time, we're pretty sure the first GICv4.1 ITS will do. 4176e252cf8aSMarc Zyngier */ 4177e252cf8aSMarc Zyngier its_send_single_vcommand(find_4_1_its(), its_build_vsgi_cmd, &desc); 4178e252cf8aSMarc Zyngier } 4179e252cf8aSMarc Zyngier 4180b4e8d644SMarc Zyngier static void its_sgi_mask_irq(struct irq_data *d) 4181b4e8d644SMarc Zyngier { 4182b4e8d644SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 4183b4e8d644SMarc Zyngier 4184b4e8d644SMarc Zyngier vpe->sgi_config[d->hwirq].enabled = false; 4185b4e8d644SMarc Zyngier its_configure_sgi(d, false); 4186b4e8d644SMarc Zyngier } 4187b4e8d644SMarc Zyngier 4188b4e8d644SMarc Zyngier static void its_sgi_unmask_irq(struct irq_data *d) 4189b4e8d644SMarc Zyngier { 4190b4e8d644SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 4191b4e8d644SMarc Zyngier 4192b4e8d644SMarc Zyngier vpe->sgi_config[d->hwirq].enabled = true; 4193b4e8d644SMarc Zyngier its_configure_sgi(d, false); 4194b4e8d644SMarc Zyngier } 4195b4e8d644SMarc Zyngier 4196166cba71SMarc Zyngier static int its_sgi_set_affinity(struct irq_data *d, 4197166cba71SMarc Zyngier const struct cpumask *mask_val, 4198166cba71SMarc Zyngier bool force) 4199166cba71SMarc Zyngier { 4200166cba71SMarc Zyngier /* 4201166cba71SMarc Zyngier * There is no notion of affinity for virtual SGIs, at least 4202a359f757SIngo Molnar * not on the host (since they can only be targeting a vPE). 4203166cba71SMarc Zyngier * Tell the kernel we've done whatever it asked for. 4204166cba71SMarc Zyngier */ 42054b2dfe1eSMarc Zyngier irq_data_update_effective_affinity(d, mask_val); 4206166cba71SMarc Zyngier return IRQ_SET_MASK_OK; 4207166cba71SMarc Zyngier } 4208166cba71SMarc Zyngier 42097017ff0eSMarc Zyngier static int its_sgi_set_irqchip_state(struct irq_data *d, 42107017ff0eSMarc Zyngier enum irqchip_irq_state which, 42117017ff0eSMarc Zyngier bool state) 42127017ff0eSMarc Zyngier { 42137017ff0eSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 42147017ff0eSMarc Zyngier return -EINVAL; 42157017ff0eSMarc Zyngier 42167017ff0eSMarc Zyngier if (state) { 42177017ff0eSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 42187017ff0eSMarc Zyngier struct its_node *its = find_4_1_its(); 42197017ff0eSMarc Zyngier u64 val; 42207017ff0eSMarc Zyngier 42217017ff0eSMarc Zyngier val = FIELD_PREP(GITS_SGIR_VPEID, vpe->vpe_id); 42227017ff0eSMarc Zyngier val |= FIELD_PREP(GITS_SGIR_VINTID, d->hwirq); 42237017ff0eSMarc Zyngier writeq_relaxed(val, its->sgir_base + GITS_SGIR - SZ_128K); 42247017ff0eSMarc Zyngier } else { 42257017ff0eSMarc Zyngier its_configure_sgi(d, true); 42267017ff0eSMarc Zyngier } 42277017ff0eSMarc Zyngier 42287017ff0eSMarc Zyngier return 0; 42297017ff0eSMarc Zyngier } 42307017ff0eSMarc Zyngier 42317017ff0eSMarc Zyngier static int its_sgi_get_irqchip_state(struct irq_data *d, 42327017ff0eSMarc Zyngier enum irqchip_irq_state which, bool *val) 42337017ff0eSMarc Zyngier { 42347017ff0eSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 42357017ff0eSMarc Zyngier void __iomem *base; 42367017ff0eSMarc Zyngier unsigned long flags; 42377017ff0eSMarc Zyngier u32 count = 1000000; /* 1s! */ 42387017ff0eSMarc Zyngier u32 status; 42397017ff0eSMarc Zyngier int cpu; 42407017ff0eSMarc Zyngier 42417017ff0eSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 42427017ff0eSMarc Zyngier return -EINVAL; 42437017ff0eSMarc Zyngier 42447017ff0eSMarc Zyngier /* 42457017ff0eSMarc Zyngier * Locking galore! We can race against two different events: 42467017ff0eSMarc Zyngier * 4247a359f757SIngo Molnar * - Concurrent vPE affinity change: we must make sure it cannot 42487017ff0eSMarc Zyngier * happen, or we'll talk to the wrong redistributor. This is 42497017ff0eSMarc Zyngier * identical to what happens with vLPIs. 42507017ff0eSMarc Zyngier * 42517017ff0eSMarc Zyngier * - Concurrent VSGIPENDR access: As it involves accessing two 42527017ff0eSMarc Zyngier * MMIO registers, this must be made atomic one way or another. 42537017ff0eSMarc Zyngier */ 42547017ff0eSMarc Zyngier cpu = vpe_to_cpuid_lock(vpe, &flags); 42557017ff0eSMarc Zyngier raw_spin_lock(&gic_data_rdist_cpu(cpu)->rd_lock); 42567017ff0eSMarc Zyngier base = gic_data_rdist_cpu(cpu)->rd_base + SZ_128K; 42577017ff0eSMarc Zyngier writel_relaxed(vpe->vpe_id, base + GICR_VSGIR); 42587017ff0eSMarc Zyngier do { 42597017ff0eSMarc Zyngier status = readl_relaxed(base + GICR_VSGIPENDR); 42607017ff0eSMarc Zyngier if (!(status & GICR_VSGIPENDR_BUSY)) 42617017ff0eSMarc Zyngier goto out; 42627017ff0eSMarc Zyngier 42637017ff0eSMarc Zyngier count--; 42647017ff0eSMarc Zyngier if (!count) { 42657017ff0eSMarc Zyngier pr_err_ratelimited("Unable to get SGI status\n"); 42667017ff0eSMarc Zyngier goto out; 42677017ff0eSMarc Zyngier } 42687017ff0eSMarc Zyngier cpu_relax(); 42697017ff0eSMarc Zyngier udelay(1); 42707017ff0eSMarc Zyngier } while (count); 42717017ff0eSMarc Zyngier 42727017ff0eSMarc Zyngier out: 42737017ff0eSMarc Zyngier raw_spin_unlock(&gic_data_rdist_cpu(cpu)->rd_lock); 42747017ff0eSMarc Zyngier vpe_to_cpuid_unlock(vpe, flags); 42757017ff0eSMarc Zyngier 42767017ff0eSMarc Zyngier if (!count) 42777017ff0eSMarc Zyngier return -ENXIO; 42787017ff0eSMarc Zyngier 42797017ff0eSMarc Zyngier *val = !!(status & (1 << d->hwirq)); 42807017ff0eSMarc Zyngier 42817017ff0eSMarc Zyngier return 0; 42827017ff0eSMarc Zyngier } 42837017ff0eSMarc Zyngier 428405d32df1SMarc Zyngier static int its_sgi_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 428505d32df1SMarc Zyngier { 428605d32df1SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 428705d32df1SMarc Zyngier struct its_cmd_info *info = vcpu_info; 428805d32df1SMarc Zyngier 428905d32df1SMarc Zyngier switch (info->cmd_type) { 429005d32df1SMarc Zyngier case PROP_UPDATE_VSGI: 429105d32df1SMarc Zyngier vpe->sgi_config[d->hwirq].priority = info->priority; 429205d32df1SMarc Zyngier vpe->sgi_config[d->hwirq].group = info->group; 429305d32df1SMarc Zyngier its_configure_sgi(d, false); 429405d32df1SMarc Zyngier return 0; 429505d32df1SMarc Zyngier 429605d32df1SMarc Zyngier default: 429705d32df1SMarc Zyngier return -EINVAL; 429805d32df1SMarc Zyngier } 429905d32df1SMarc Zyngier } 430005d32df1SMarc Zyngier 4301166cba71SMarc Zyngier static struct irq_chip its_sgi_irq_chip = { 4302166cba71SMarc Zyngier .name = "GICv4.1-sgi", 4303b4e8d644SMarc Zyngier .irq_mask = its_sgi_mask_irq, 4304b4e8d644SMarc Zyngier .irq_unmask = its_sgi_unmask_irq, 4305166cba71SMarc Zyngier .irq_set_affinity = its_sgi_set_affinity, 43067017ff0eSMarc Zyngier .irq_set_irqchip_state = its_sgi_set_irqchip_state, 43077017ff0eSMarc Zyngier .irq_get_irqchip_state = its_sgi_get_irqchip_state, 430805d32df1SMarc Zyngier .irq_set_vcpu_affinity = its_sgi_set_vcpu_affinity, 4309166cba71SMarc Zyngier }; 4310166cba71SMarc Zyngier 4311166cba71SMarc Zyngier static int its_sgi_irq_domain_alloc(struct irq_domain *domain, 4312166cba71SMarc Zyngier unsigned int virq, unsigned int nr_irqs, 4313166cba71SMarc Zyngier void *args) 4314166cba71SMarc Zyngier { 4315166cba71SMarc Zyngier struct its_vpe *vpe = args; 4316166cba71SMarc Zyngier int i; 4317166cba71SMarc Zyngier 4318166cba71SMarc Zyngier /* Yes, we do want 16 SGIs */ 4319166cba71SMarc Zyngier WARN_ON(nr_irqs != 16); 4320166cba71SMarc Zyngier 4321166cba71SMarc Zyngier for (i = 0; i < 16; i++) { 4322166cba71SMarc Zyngier vpe->sgi_config[i].priority = 0; 4323166cba71SMarc Zyngier vpe->sgi_config[i].enabled = false; 4324166cba71SMarc Zyngier vpe->sgi_config[i].group = false; 4325166cba71SMarc Zyngier 4326166cba71SMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, i, 4327166cba71SMarc Zyngier &its_sgi_irq_chip, vpe); 4328166cba71SMarc Zyngier irq_set_status_flags(virq + i, IRQ_DISABLE_UNLAZY); 4329166cba71SMarc Zyngier } 4330166cba71SMarc Zyngier 4331166cba71SMarc Zyngier return 0; 4332166cba71SMarc Zyngier } 4333166cba71SMarc Zyngier 4334166cba71SMarc Zyngier static void its_sgi_irq_domain_free(struct irq_domain *domain, 4335166cba71SMarc Zyngier unsigned int virq, 4336166cba71SMarc Zyngier unsigned int nr_irqs) 4337166cba71SMarc Zyngier { 4338166cba71SMarc Zyngier /* Nothing to do */ 4339166cba71SMarc Zyngier } 4340166cba71SMarc Zyngier 4341166cba71SMarc Zyngier static int its_sgi_irq_domain_activate(struct irq_domain *domain, 4342166cba71SMarc Zyngier struct irq_data *d, bool reserve) 4343166cba71SMarc Zyngier { 4344e252cf8aSMarc Zyngier /* Write out the initial SGI configuration */ 4345e252cf8aSMarc Zyngier its_configure_sgi(d, false); 4346166cba71SMarc Zyngier return 0; 4347166cba71SMarc Zyngier } 4348166cba71SMarc Zyngier 4349166cba71SMarc Zyngier static void its_sgi_irq_domain_deactivate(struct irq_domain *domain, 4350166cba71SMarc Zyngier struct irq_data *d) 4351166cba71SMarc Zyngier { 4352e252cf8aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 4353e252cf8aSMarc Zyngier 4354e252cf8aSMarc Zyngier /* 4355e252cf8aSMarc Zyngier * The VSGI command is awkward: 4356e252cf8aSMarc Zyngier * 4357e252cf8aSMarc Zyngier * - To change the configuration, CLEAR must be set to false, 4358e252cf8aSMarc Zyngier * leaving the pending bit unchanged. 4359e252cf8aSMarc Zyngier * - To clear the pending bit, CLEAR must be set to true, leaving 4360e252cf8aSMarc Zyngier * the configuration unchanged. 4361e252cf8aSMarc Zyngier * 4362e252cf8aSMarc Zyngier * You just can't do both at once, hence the two commands below. 4363e252cf8aSMarc Zyngier */ 4364e252cf8aSMarc Zyngier vpe->sgi_config[d->hwirq].enabled = false; 4365e252cf8aSMarc Zyngier its_configure_sgi(d, false); 4366e252cf8aSMarc Zyngier its_configure_sgi(d, true); 4367166cba71SMarc Zyngier } 4368166cba71SMarc Zyngier 4369166cba71SMarc Zyngier static const struct irq_domain_ops its_sgi_domain_ops = { 4370166cba71SMarc Zyngier .alloc = its_sgi_irq_domain_alloc, 4371166cba71SMarc Zyngier .free = its_sgi_irq_domain_free, 4372166cba71SMarc Zyngier .activate = its_sgi_irq_domain_activate, 4373166cba71SMarc Zyngier .deactivate = its_sgi_irq_domain_deactivate, 4374166cba71SMarc Zyngier }; 4375166cba71SMarc Zyngier 43767d75bbb4SMarc Zyngier static int its_vpe_id_alloc(void) 43777d75bbb4SMarc Zyngier { 437832bd44dcSShanker Donthineni return ida_simple_get(&its_vpeid_ida, 0, ITS_MAX_VPEID, GFP_KERNEL); 43797d75bbb4SMarc Zyngier } 43807d75bbb4SMarc Zyngier 43817d75bbb4SMarc Zyngier static void its_vpe_id_free(u16 id) 43827d75bbb4SMarc Zyngier { 43837d75bbb4SMarc Zyngier ida_simple_remove(&its_vpeid_ida, id); 43847d75bbb4SMarc Zyngier } 43857d75bbb4SMarc Zyngier 43867d75bbb4SMarc Zyngier static int its_vpe_init(struct its_vpe *vpe) 43877d75bbb4SMarc Zyngier { 43887d75bbb4SMarc Zyngier struct page *vpt_page; 43897d75bbb4SMarc Zyngier int vpe_id; 43907d75bbb4SMarc Zyngier 43917d75bbb4SMarc Zyngier /* Allocate vpe_id */ 43927d75bbb4SMarc Zyngier vpe_id = its_vpe_id_alloc(); 43937d75bbb4SMarc Zyngier if (vpe_id < 0) 43947d75bbb4SMarc Zyngier return vpe_id; 43957d75bbb4SMarc Zyngier 43967d75bbb4SMarc Zyngier /* Allocate VPT */ 43977d75bbb4SMarc Zyngier vpt_page = its_allocate_pending_table(GFP_KERNEL); 43987d75bbb4SMarc Zyngier if (!vpt_page) { 43997d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 44007d75bbb4SMarc Zyngier return -ENOMEM; 44017d75bbb4SMarc Zyngier } 44027d75bbb4SMarc Zyngier 44037d75bbb4SMarc Zyngier if (!its_alloc_vpe_table(vpe_id)) { 44047d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 440534f8eb92SNianyao Tang its_free_pending_table(vpt_page); 44067d75bbb4SMarc Zyngier return -ENOMEM; 44077d75bbb4SMarc Zyngier } 44087d75bbb4SMarc Zyngier 4409f3a05921SMarc Zyngier raw_spin_lock_init(&vpe->vpe_lock); 44107d75bbb4SMarc Zyngier vpe->vpe_id = vpe_id; 44117d75bbb4SMarc Zyngier vpe->vpt_page = vpt_page; 441264edfaa9SMarc Zyngier if (gic_rdists->has_rvpeid) 441364edfaa9SMarc Zyngier atomic_set(&vpe->vmapp_count, 0); 441464edfaa9SMarc Zyngier else 441520b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 44167d75bbb4SMarc Zyngier 44177d75bbb4SMarc Zyngier return 0; 44187d75bbb4SMarc Zyngier } 44197d75bbb4SMarc Zyngier 44207d75bbb4SMarc Zyngier static void its_vpe_teardown(struct its_vpe *vpe) 44217d75bbb4SMarc Zyngier { 442220b3d54eSMarc Zyngier its_vpe_db_proxy_unmap(vpe); 44237d75bbb4SMarc Zyngier its_vpe_id_free(vpe->vpe_id); 44247d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 44257d75bbb4SMarc Zyngier } 44267d75bbb4SMarc Zyngier 44277d75bbb4SMarc Zyngier static void its_vpe_irq_domain_free(struct irq_domain *domain, 44287d75bbb4SMarc Zyngier unsigned int virq, 44297d75bbb4SMarc Zyngier unsigned int nr_irqs) 44307d75bbb4SMarc Zyngier { 44317d75bbb4SMarc Zyngier struct its_vm *vm = domain->host_data; 44327d75bbb4SMarc Zyngier int i; 44337d75bbb4SMarc Zyngier 44347d75bbb4SMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 44357d75bbb4SMarc Zyngier 44367d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 44377d75bbb4SMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 44387d75bbb4SMarc Zyngier virq + i); 44397d75bbb4SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(data); 44407d75bbb4SMarc Zyngier 44417d75bbb4SMarc Zyngier BUG_ON(vm != vpe->its_vm); 44427d75bbb4SMarc Zyngier 44437d75bbb4SMarc Zyngier clear_bit(data->hwirq, vm->db_bitmap); 44447d75bbb4SMarc Zyngier its_vpe_teardown(vpe); 44457d75bbb4SMarc Zyngier irq_domain_reset_irq_data(data); 44467d75bbb4SMarc Zyngier } 44477d75bbb4SMarc Zyngier 44487d75bbb4SMarc Zyngier if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { 444938dd7c49SMarc Zyngier its_lpi_free(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); 44507d75bbb4SMarc Zyngier its_free_prop_table(vm->vprop_page); 44517d75bbb4SMarc Zyngier } 44527d75bbb4SMarc Zyngier } 44537d75bbb4SMarc Zyngier 44547d75bbb4SMarc Zyngier static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 44557d75bbb4SMarc Zyngier unsigned int nr_irqs, void *args) 44567d75bbb4SMarc Zyngier { 445729c647f3SMarc Zyngier struct irq_chip *irqchip = &its_vpe_irq_chip; 44587d75bbb4SMarc Zyngier struct its_vm *vm = args; 44597d75bbb4SMarc Zyngier unsigned long *bitmap; 44607d75bbb4SMarc Zyngier struct page *vprop_page; 44617d75bbb4SMarc Zyngier int base, nr_ids, i, err = 0; 44627d75bbb4SMarc Zyngier 44637d75bbb4SMarc Zyngier BUG_ON(!vm); 44647d75bbb4SMarc Zyngier 446538dd7c49SMarc Zyngier bitmap = its_lpi_alloc(roundup_pow_of_two(nr_irqs), &base, &nr_ids); 44667d75bbb4SMarc Zyngier if (!bitmap) 44677d75bbb4SMarc Zyngier return -ENOMEM; 44687d75bbb4SMarc Zyngier 44697d75bbb4SMarc Zyngier if (nr_ids < nr_irqs) { 447038dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 44717d75bbb4SMarc Zyngier return -ENOMEM; 44727d75bbb4SMarc Zyngier } 44737d75bbb4SMarc Zyngier 44747d75bbb4SMarc Zyngier vprop_page = its_allocate_prop_table(GFP_KERNEL); 44757d75bbb4SMarc Zyngier if (!vprop_page) { 447638dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 44777d75bbb4SMarc Zyngier return -ENOMEM; 44787d75bbb4SMarc Zyngier } 44797d75bbb4SMarc Zyngier 44807d75bbb4SMarc Zyngier vm->db_bitmap = bitmap; 44817d75bbb4SMarc Zyngier vm->db_lpi_base = base; 44827d75bbb4SMarc Zyngier vm->nr_db_lpis = nr_ids; 44837d75bbb4SMarc Zyngier vm->vprop_page = vprop_page; 44847d75bbb4SMarc Zyngier 448529c647f3SMarc Zyngier if (gic_rdists->has_rvpeid) 448629c647f3SMarc Zyngier irqchip = &its_vpe_4_1_irq_chip; 448729c647f3SMarc Zyngier 44887d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 44897d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi = base + i; 44907d75bbb4SMarc Zyngier err = its_vpe_init(vm->vpes[i]); 44917d75bbb4SMarc Zyngier if (err) 44927d75bbb4SMarc Zyngier break; 44937d75bbb4SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, 44947d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi); 44957d75bbb4SMarc Zyngier if (err) 44967d75bbb4SMarc Zyngier break; 44977d75bbb4SMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, i, 449829c647f3SMarc Zyngier irqchip, vm->vpes[i]); 44997d75bbb4SMarc Zyngier set_bit(i, bitmap); 45007d75bbb4SMarc Zyngier } 45017d75bbb4SMarc Zyngier 45027d75bbb4SMarc Zyngier if (err) { 45037d75bbb4SMarc Zyngier if (i > 0) 4504280bef51SKaige Fu its_vpe_irq_domain_free(domain, virq, i); 45057d75bbb4SMarc Zyngier 450638dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 45077d75bbb4SMarc Zyngier its_free_prop_table(vprop_page); 45087d75bbb4SMarc Zyngier } 45097d75bbb4SMarc Zyngier 45107d75bbb4SMarc Zyngier return err; 45117d75bbb4SMarc Zyngier } 45127d75bbb4SMarc Zyngier 451372491643SThomas Gleixner static int its_vpe_irq_domain_activate(struct irq_domain *domain, 4514702cb0a0SThomas Gleixner struct irq_data *d, bool reserve) 4515eb78192bSMarc Zyngier { 4516eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 451740619a2eSMarc Zyngier struct its_node *its; 4518eb78192bSMarc Zyngier 4519009384b3SMarc Zyngier /* 4520009384b3SMarc Zyngier * If we use the list map, we issue VMAPP on demand... Unless 4521009384b3SMarc Zyngier * we're on a GICv4.1 and we eagerly map the VPE on all ITSs 4522009384b3SMarc Zyngier * so that VSGIs can work. 4523009384b3SMarc Zyngier */ 4524009384b3SMarc Zyngier if (!gic_requires_eager_mapping()) 45256ef930f2SMarc Zyngier return 0; 4526eb78192bSMarc Zyngier 4527eb78192bSMarc Zyngier /* Map the VPE to the first possible CPU */ 4528eb78192bSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 452940619a2eSMarc Zyngier 453040619a2eSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 45310dd57fedSMarc Zyngier if (!is_v4(its)) 453240619a2eSMarc Zyngier continue; 453340619a2eSMarc Zyngier 453475fd951bSMarc Zyngier its_send_vmapp(its, vpe, true); 453540619a2eSMarc Zyngier its_send_vinvall(its, vpe); 453640619a2eSMarc Zyngier } 453740619a2eSMarc Zyngier 453844c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); 453944c4c25eSMarc Zyngier 454072491643SThomas Gleixner return 0; 4541eb78192bSMarc Zyngier } 4542eb78192bSMarc Zyngier 4543eb78192bSMarc Zyngier static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, 4544eb78192bSMarc Zyngier struct irq_data *d) 4545eb78192bSMarc Zyngier { 4546eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 454775fd951bSMarc Zyngier struct its_node *its; 4548eb78192bSMarc Zyngier 45492247e1bfSMarc Zyngier /* 4550009384b3SMarc Zyngier * If we use the list map on GICv4.0, we unmap the VPE once no 4551009384b3SMarc Zyngier * VLPIs are associated with the VM. 45522247e1bfSMarc Zyngier */ 4553009384b3SMarc Zyngier if (!gic_requires_eager_mapping()) 45542247e1bfSMarc Zyngier return; 45552247e1bfSMarc Zyngier 455675fd951bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 45570dd57fedSMarc Zyngier if (!is_v4(its)) 455875fd951bSMarc Zyngier continue; 455975fd951bSMarc Zyngier 456075fd951bSMarc Zyngier its_send_vmapp(its, vpe, false); 456175fd951bSMarc Zyngier } 4562301beaf1SMarc Zyngier 4563301beaf1SMarc Zyngier /* 4564301beaf1SMarc Zyngier * There may be a direct read to the VPT after unmapping the 4565301beaf1SMarc Zyngier * vPE, to guarantee the validity of this, we make the VPT 4566301beaf1SMarc Zyngier * memory coherent with the CPU caches here. 4567301beaf1SMarc Zyngier */ 4568301beaf1SMarc Zyngier if (find_4_1_its() && !atomic_read(&vpe->vmapp_count)) 4569301beaf1SMarc Zyngier gic_flush_dcache_to_poc(page_address(vpe->vpt_page), 4570301beaf1SMarc Zyngier LPI_PENDBASE_SZ); 4571eb78192bSMarc Zyngier } 4572eb78192bSMarc Zyngier 45738fff27aeSMarc Zyngier static const struct irq_domain_ops its_vpe_domain_ops = { 45747d75bbb4SMarc Zyngier .alloc = its_vpe_irq_domain_alloc, 45757d75bbb4SMarc Zyngier .free = its_vpe_irq_domain_free, 4576eb78192bSMarc Zyngier .activate = its_vpe_irq_domain_activate, 4577eb78192bSMarc Zyngier .deactivate = its_vpe_irq_domain_deactivate, 45788fff27aeSMarc Zyngier }; 45798fff27aeSMarc Zyngier 45804559fbb3SYun Wu static int its_force_quiescent(void __iomem *base) 45814559fbb3SYun Wu { 45824559fbb3SYun Wu u32 count = 1000000; /* 1s */ 45834559fbb3SYun Wu u32 val; 45844559fbb3SYun Wu 45854559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 45867611da86SDavid Daney /* 45877611da86SDavid Daney * GIC architecture specification requires the ITS to be both 45887611da86SDavid Daney * disabled and quiescent for writes to GITS_BASER<n> or 45897611da86SDavid Daney * GITS_CBASER to not have UNPREDICTABLE results. 45907611da86SDavid Daney */ 45917611da86SDavid Daney if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) 45924559fbb3SYun Wu return 0; 45934559fbb3SYun Wu 45944559fbb3SYun Wu /* Disable the generation of all interrupts to this ITS */ 4595d51c4b4dSMarc Zyngier val &= ~(GITS_CTLR_ENABLE | GITS_CTLR_ImDe); 45964559fbb3SYun Wu writel_relaxed(val, base + GITS_CTLR); 45974559fbb3SYun Wu 45984559fbb3SYun Wu /* Poll GITS_CTLR and wait until ITS becomes quiescent */ 45994559fbb3SYun Wu while (1) { 46004559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 46014559fbb3SYun Wu if (val & GITS_CTLR_QUIESCENT) 46024559fbb3SYun Wu return 0; 46034559fbb3SYun Wu 46044559fbb3SYun Wu count--; 46054559fbb3SYun Wu if (!count) 46064559fbb3SYun Wu return -EBUSY; 46074559fbb3SYun Wu 46084559fbb3SYun Wu cpu_relax(); 46094559fbb3SYun Wu udelay(1); 46104559fbb3SYun Wu } 46114559fbb3SYun Wu } 46124559fbb3SYun Wu 46139d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_cavium_22375(void *data) 461494100970SRobert Richter { 461594100970SRobert Richter struct its_node *its = data; 461694100970SRobert Richter 4617576a8342SMarc Zyngier /* erratum 22375: only alloc 8MB table size (20 bits) */ 4618576a8342SMarc Zyngier its->typer &= ~GITS_TYPER_DEVBITS; 4619576a8342SMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, 20 - 1); 462094100970SRobert Richter its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; 46219d111d49SArd Biesheuvel 46229d111d49SArd Biesheuvel return true; 462394100970SRobert Richter } 462494100970SRobert Richter 46259d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_cavium_23144(void *data) 4626fbf8f40eSGanapatrao Kulkarni { 4627fbf8f40eSGanapatrao Kulkarni struct its_node *its = data; 4628fbf8f40eSGanapatrao Kulkarni 4629fbf8f40eSGanapatrao Kulkarni its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; 46309d111d49SArd Biesheuvel 46319d111d49SArd Biesheuvel return true; 4632fbf8f40eSGanapatrao Kulkarni } 4633fbf8f40eSGanapatrao Kulkarni 46349d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) 463590922a2dSShanker Donthineni { 463690922a2dSShanker Donthineni struct its_node *its = data; 463790922a2dSShanker Donthineni 463890922a2dSShanker Donthineni /* On QDF2400, the size of the ITE is 16Bytes */ 4639ffedbf0cSMarc Zyngier its->typer &= ~GITS_TYPER_ITT_ENTRY_SIZE; 4640ffedbf0cSMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_ITT_ENTRY_SIZE, 16 - 1); 46419d111d49SArd Biesheuvel 46429d111d49SArd Biesheuvel return true; 464390922a2dSShanker Donthineni } 464490922a2dSShanker Donthineni 4645558b0165SArd Biesheuvel static u64 its_irq_get_msi_base_pre_its(struct its_device *its_dev) 4646558b0165SArd Biesheuvel { 4647558b0165SArd Biesheuvel struct its_node *its = its_dev->its; 4648558b0165SArd Biesheuvel 4649558b0165SArd Biesheuvel /* 4650558b0165SArd Biesheuvel * The Socionext Synquacer SoC has a so-called 'pre-ITS', 4651558b0165SArd Biesheuvel * which maps 32-bit writes targeted at a separate window of 4652558b0165SArd Biesheuvel * size '4 << device_id_bits' onto writes to GITS_TRANSLATER 4653558b0165SArd Biesheuvel * with device ID taken from bits [device_id_bits + 1:2] of 4654558b0165SArd Biesheuvel * the window offset. 4655558b0165SArd Biesheuvel */ 4656558b0165SArd Biesheuvel return its->pre_its_base + (its_dev->device_id << 2); 4657558b0165SArd Biesheuvel } 4658558b0165SArd Biesheuvel 4659558b0165SArd Biesheuvel static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data) 4660558b0165SArd Biesheuvel { 4661558b0165SArd Biesheuvel struct its_node *its = data; 4662558b0165SArd Biesheuvel u32 pre_its_window[2]; 4663558b0165SArd Biesheuvel u32 ids; 4664558b0165SArd Biesheuvel 4665558b0165SArd Biesheuvel if (!fwnode_property_read_u32_array(its->fwnode_handle, 4666558b0165SArd Biesheuvel "socionext,synquacer-pre-its", 4667558b0165SArd Biesheuvel pre_its_window, 4668558b0165SArd Biesheuvel ARRAY_SIZE(pre_its_window))) { 4669558b0165SArd Biesheuvel 4670558b0165SArd Biesheuvel its->pre_its_base = pre_its_window[0]; 4671558b0165SArd Biesheuvel its->get_msi_base = its_irq_get_msi_base_pre_its; 4672558b0165SArd Biesheuvel 4673558b0165SArd Biesheuvel ids = ilog2(pre_its_window[1]) - 2; 4674576a8342SMarc Zyngier if (device_ids(its) > ids) { 4675576a8342SMarc Zyngier its->typer &= ~GITS_TYPER_DEVBITS; 4676576a8342SMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, ids - 1); 4677576a8342SMarc Zyngier } 4678558b0165SArd Biesheuvel 4679558b0165SArd Biesheuvel /* the pre-ITS breaks isolation, so disable MSI remapping */ 4680558b0165SArd Biesheuvel its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP; 4681558b0165SArd Biesheuvel return true; 4682558b0165SArd Biesheuvel } 4683558b0165SArd Biesheuvel return false; 4684558b0165SArd Biesheuvel } 4685558b0165SArd Biesheuvel 46865c9a882eSMarc Zyngier static bool __maybe_unused its_enable_quirk_hip07_161600802(void *data) 46875c9a882eSMarc Zyngier { 46885c9a882eSMarc Zyngier struct its_node *its = data; 46895c9a882eSMarc Zyngier 46905c9a882eSMarc Zyngier /* 46915c9a882eSMarc Zyngier * Hip07 insists on using the wrong address for the VLPI 46925c9a882eSMarc Zyngier * page. Trick it into doing the right thing... 46935c9a882eSMarc Zyngier */ 46945c9a882eSMarc Zyngier its->vlpi_redist_offset = SZ_128K; 46955c9a882eSMarc Zyngier return true; 4696cc2d3216SMarc Zyngier } 46974c21f3c2SMarc Zyngier 469867510ccaSRobert Richter static const struct gic_quirk its_quirks[] = { 469994100970SRobert Richter #ifdef CONFIG_CAVIUM_ERRATUM_22375 470094100970SRobert Richter { 470194100970SRobert Richter .desc = "ITS: Cavium errata 22375, 24313", 470294100970SRobert Richter .iidr = 0xa100034c, /* ThunderX pass 1.x */ 470394100970SRobert Richter .mask = 0xffff0fff, 470494100970SRobert Richter .init = its_enable_quirk_cavium_22375, 470594100970SRobert Richter }, 470694100970SRobert Richter #endif 4707fbf8f40eSGanapatrao Kulkarni #ifdef CONFIG_CAVIUM_ERRATUM_23144 4708fbf8f40eSGanapatrao Kulkarni { 4709fbf8f40eSGanapatrao Kulkarni .desc = "ITS: Cavium erratum 23144", 4710fbf8f40eSGanapatrao Kulkarni .iidr = 0xa100034c, /* ThunderX pass 1.x */ 4711fbf8f40eSGanapatrao Kulkarni .mask = 0xffff0fff, 4712fbf8f40eSGanapatrao Kulkarni .init = its_enable_quirk_cavium_23144, 4713fbf8f40eSGanapatrao Kulkarni }, 4714fbf8f40eSGanapatrao Kulkarni #endif 471590922a2dSShanker Donthineni #ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 471690922a2dSShanker Donthineni { 471790922a2dSShanker Donthineni .desc = "ITS: QDF2400 erratum 0065", 471890922a2dSShanker Donthineni .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ 471990922a2dSShanker Donthineni .mask = 0xffffffff, 472090922a2dSShanker Donthineni .init = its_enable_quirk_qdf2400_e0065, 472190922a2dSShanker Donthineni }, 472290922a2dSShanker Donthineni #endif 4723558b0165SArd Biesheuvel #ifdef CONFIG_SOCIONEXT_SYNQUACER_PREITS 4724558b0165SArd Biesheuvel { 4725558b0165SArd Biesheuvel /* 4726558b0165SArd Biesheuvel * The Socionext Synquacer SoC incorporates ARM's own GIC-500 4727558b0165SArd Biesheuvel * implementation, but with a 'pre-ITS' added that requires 4728558b0165SArd Biesheuvel * special handling in software. 4729558b0165SArd Biesheuvel */ 4730558b0165SArd Biesheuvel .desc = "ITS: Socionext Synquacer pre-ITS", 4731558b0165SArd Biesheuvel .iidr = 0x0001143b, 4732558b0165SArd Biesheuvel .mask = 0xffffffff, 4733558b0165SArd Biesheuvel .init = its_enable_quirk_socionext_synquacer, 4734558b0165SArd Biesheuvel }, 4735558b0165SArd Biesheuvel #endif 47365c9a882eSMarc Zyngier #ifdef CONFIG_HISILICON_ERRATUM_161600802 47375c9a882eSMarc Zyngier { 47385c9a882eSMarc Zyngier .desc = "ITS: Hip07 erratum 161600802", 47395c9a882eSMarc Zyngier .iidr = 0x00000004, 47405c9a882eSMarc Zyngier .mask = 0xffffffff, 47415c9a882eSMarc Zyngier .init = its_enable_quirk_hip07_161600802, 47425c9a882eSMarc Zyngier }, 47435c9a882eSMarc Zyngier #endif 474467510ccaSRobert Richter { 474567510ccaSRobert Richter } 474667510ccaSRobert Richter }; 474767510ccaSRobert Richter 474867510ccaSRobert Richter static void its_enable_quirks(struct its_node *its) 474967510ccaSRobert Richter { 475067510ccaSRobert Richter u32 iidr = readl_relaxed(its->base + GITS_IIDR); 475167510ccaSRobert Richter 475267510ccaSRobert Richter gic_enable_quirks(iidr, its_quirks, its); 475367510ccaSRobert Richter } 475467510ccaSRobert Richter 4755dba0bc7bSDerek Basehore static int its_save_disable(void) 4756dba0bc7bSDerek Basehore { 4757dba0bc7bSDerek Basehore struct its_node *its; 4758dba0bc7bSDerek Basehore int err = 0; 4759dba0bc7bSDerek Basehore 4760a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 4761dba0bc7bSDerek Basehore list_for_each_entry(its, &its_nodes, entry) { 4762dba0bc7bSDerek Basehore void __iomem *base; 4763dba0bc7bSDerek Basehore 4764dba0bc7bSDerek Basehore base = its->base; 4765dba0bc7bSDerek Basehore its->ctlr_save = readl_relaxed(base + GITS_CTLR); 4766dba0bc7bSDerek Basehore err = its_force_quiescent(base); 4767dba0bc7bSDerek Basehore if (err) { 4768dba0bc7bSDerek Basehore pr_err("ITS@%pa: failed to quiesce: %d\n", 4769dba0bc7bSDerek Basehore &its->phys_base, err); 4770dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 4771dba0bc7bSDerek Basehore goto err; 4772dba0bc7bSDerek Basehore } 4773dba0bc7bSDerek Basehore 4774dba0bc7bSDerek Basehore its->cbaser_save = gits_read_cbaser(base + GITS_CBASER); 4775dba0bc7bSDerek Basehore } 4776dba0bc7bSDerek Basehore 4777dba0bc7bSDerek Basehore err: 4778dba0bc7bSDerek Basehore if (err) { 4779dba0bc7bSDerek Basehore list_for_each_entry_continue_reverse(its, &its_nodes, entry) { 4780dba0bc7bSDerek Basehore void __iomem *base; 4781dba0bc7bSDerek Basehore 4782dba0bc7bSDerek Basehore base = its->base; 4783dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 4784dba0bc7bSDerek Basehore } 4785dba0bc7bSDerek Basehore } 4786a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 4787dba0bc7bSDerek Basehore 4788dba0bc7bSDerek Basehore return err; 4789dba0bc7bSDerek Basehore } 4790dba0bc7bSDerek Basehore 4791dba0bc7bSDerek Basehore static void its_restore_enable(void) 4792dba0bc7bSDerek Basehore { 4793dba0bc7bSDerek Basehore struct its_node *its; 4794dba0bc7bSDerek Basehore int ret; 4795dba0bc7bSDerek Basehore 4796a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 4797dba0bc7bSDerek Basehore list_for_each_entry(its, &its_nodes, entry) { 4798dba0bc7bSDerek Basehore void __iomem *base; 4799dba0bc7bSDerek Basehore int i; 4800dba0bc7bSDerek Basehore 4801dba0bc7bSDerek Basehore base = its->base; 4802dba0bc7bSDerek Basehore 4803dba0bc7bSDerek Basehore /* 4804dba0bc7bSDerek Basehore * Make sure that the ITS is disabled. If it fails to quiesce, 4805dba0bc7bSDerek Basehore * don't restore it since writing to CBASER or BASER<n> 4806dba0bc7bSDerek Basehore * registers is undefined according to the GIC v3 ITS 4807dba0bc7bSDerek Basehore * Specification. 480874cde1a5SXu Qiang * 480974cde1a5SXu Qiang * Firmware resuming with the ITS enabled is terminally broken. 4810dba0bc7bSDerek Basehore */ 481174cde1a5SXu Qiang WARN_ON(readl_relaxed(base + GITS_CTLR) & GITS_CTLR_ENABLE); 4812dba0bc7bSDerek Basehore ret = its_force_quiescent(base); 4813dba0bc7bSDerek Basehore if (ret) { 4814dba0bc7bSDerek Basehore pr_err("ITS@%pa: failed to quiesce on resume: %d\n", 4815dba0bc7bSDerek Basehore &its->phys_base, ret); 4816dba0bc7bSDerek Basehore continue; 4817dba0bc7bSDerek Basehore } 4818dba0bc7bSDerek Basehore 4819dba0bc7bSDerek Basehore gits_write_cbaser(its->cbaser_save, base + GITS_CBASER); 4820dba0bc7bSDerek Basehore 4821dba0bc7bSDerek Basehore /* 4822dba0bc7bSDerek Basehore * Writing CBASER resets CREADR to 0, so make CWRITER and 4823dba0bc7bSDerek Basehore * cmd_write line up with it. 4824dba0bc7bSDerek Basehore */ 4825dba0bc7bSDerek Basehore its->cmd_write = its->cmd_base; 4826dba0bc7bSDerek Basehore gits_write_cwriter(0, base + GITS_CWRITER); 4827dba0bc7bSDerek Basehore 4828dba0bc7bSDerek Basehore /* Restore GITS_BASER from the value cache. */ 4829dba0bc7bSDerek Basehore for (i = 0; i < GITS_BASER_NR_REGS; i++) { 4830dba0bc7bSDerek Basehore struct its_baser *baser = &its->tables[i]; 4831dba0bc7bSDerek Basehore 4832dba0bc7bSDerek Basehore if (!(baser->val & GITS_BASER_VALID)) 4833dba0bc7bSDerek Basehore continue; 4834dba0bc7bSDerek Basehore 4835dba0bc7bSDerek Basehore its_write_baser(its, baser, baser->val); 4836dba0bc7bSDerek Basehore } 4837dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 4838920181ceSDerek Basehore 4839920181ceSDerek Basehore /* 4840920181ceSDerek Basehore * Reinit the collection if it's stored in the ITS. This is 4841920181ceSDerek Basehore * indicated by the col_id being less than the HCC field. 4842920181ceSDerek Basehore * CID < HCC as specified in the GIC v3 Documentation. 4843920181ceSDerek Basehore */ 4844920181ceSDerek Basehore if (its->collections[smp_processor_id()].col_id < 4845920181ceSDerek Basehore GITS_TYPER_HCC(gic_read_typer(base + GITS_TYPER))) 4846920181ceSDerek Basehore its_cpu_init_collection(its); 4847dba0bc7bSDerek Basehore } 4848a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 4849dba0bc7bSDerek Basehore } 4850dba0bc7bSDerek Basehore 4851dba0bc7bSDerek Basehore static struct syscore_ops its_syscore_ops = { 4852dba0bc7bSDerek Basehore .suspend = its_save_disable, 4853dba0bc7bSDerek Basehore .resume = its_restore_enable, 4854dba0bc7bSDerek Basehore }; 4855dba0bc7bSDerek Basehore 4856db40f0a7STomasz Nowicki static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) 4857d14ae5e6STomasz Nowicki { 4858d14ae5e6STomasz Nowicki struct irq_domain *inner_domain; 4859d14ae5e6STomasz Nowicki struct msi_domain_info *info; 4860d14ae5e6STomasz Nowicki 4861d14ae5e6STomasz Nowicki info = kzalloc(sizeof(*info), GFP_KERNEL); 4862d14ae5e6STomasz Nowicki if (!info) 4863d14ae5e6STomasz Nowicki return -ENOMEM; 4864d14ae5e6STomasz Nowicki 4865db40f0a7STomasz Nowicki inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); 4866d14ae5e6STomasz Nowicki if (!inner_domain) { 4867d14ae5e6STomasz Nowicki kfree(info); 4868d14ae5e6STomasz Nowicki return -ENOMEM; 4869d14ae5e6STomasz Nowicki } 4870d14ae5e6STomasz Nowicki 4871db40f0a7STomasz Nowicki inner_domain->parent = its_parent; 487296f0d93aSMarc Zyngier irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); 4873558b0165SArd Biesheuvel inner_domain->flags |= its->msi_domain_flags; 4874d14ae5e6STomasz Nowicki info->ops = &its_msi_domain_ops; 4875d14ae5e6STomasz Nowicki info->data = its; 4876d14ae5e6STomasz Nowicki inner_domain->host_data = info; 4877d14ae5e6STomasz Nowicki 4878d14ae5e6STomasz Nowicki return 0; 4879d14ae5e6STomasz Nowicki } 4880d14ae5e6STomasz Nowicki 48818fff27aeSMarc Zyngier static int its_init_vpe_domain(void) 48828fff27aeSMarc Zyngier { 488320b3d54eSMarc Zyngier struct its_node *its; 488420b3d54eSMarc Zyngier u32 devid; 488520b3d54eSMarc Zyngier int entries; 488620b3d54eSMarc Zyngier 488720b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 488820b3d54eSMarc Zyngier pr_info("ITS: Using DirectLPI for VPE invalidation\n"); 488920b3d54eSMarc Zyngier return 0; 489020b3d54eSMarc Zyngier } 489120b3d54eSMarc Zyngier 489220b3d54eSMarc Zyngier /* Any ITS will do, even if not v4 */ 489320b3d54eSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 489420b3d54eSMarc Zyngier 489520b3d54eSMarc Zyngier entries = roundup_pow_of_two(nr_cpu_ids); 48966396bb22SKees Cook vpe_proxy.vpes = kcalloc(entries, sizeof(*vpe_proxy.vpes), 489720b3d54eSMarc Zyngier GFP_KERNEL); 4898944a1a17SZhen Lei if (!vpe_proxy.vpes) 489920b3d54eSMarc Zyngier return -ENOMEM; 490020b3d54eSMarc Zyngier 490120b3d54eSMarc Zyngier /* Use the last possible DevID */ 4902576a8342SMarc Zyngier devid = GENMASK(device_ids(its) - 1, 0); 490320b3d54eSMarc Zyngier vpe_proxy.dev = its_create_device(its, devid, entries, false); 490420b3d54eSMarc Zyngier if (!vpe_proxy.dev) { 490520b3d54eSMarc Zyngier kfree(vpe_proxy.vpes); 490620b3d54eSMarc Zyngier pr_err("ITS: Can't allocate GICv4 proxy device\n"); 490720b3d54eSMarc Zyngier return -ENOMEM; 490820b3d54eSMarc Zyngier } 490920b3d54eSMarc Zyngier 4910c427a475SShanker Donthineni BUG_ON(entries > vpe_proxy.dev->nr_ites); 491120b3d54eSMarc Zyngier 491220b3d54eSMarc Zyngier raw_spin_lock_init(&vpe_proxy.lock); 491320b3d54eSMarc Zyngier vpe_proxy.next_victim = 0; 491420b3d54eSMarc Zyngier pr_info("ITS: Allocated DevID %x as GICv4 proxy device (%d slots)\n", 491520b3d54eSMarc Zyngier devid, vpe_proxy.dev->nr_ites); 491620b3d54eSMarc Zyngier 49178fff27aeSMarc Zyngier return 0; 49188fff27aeSMarc Zyngier } 49198fff27aeSMarc Zyngier 49203dfa576bSMarc Zyngier static int __init its_compute_its_list_map(struct resource *res, 49213dfa576bSMarc Zyngier void __iomem *its_base) 49223dfa576bSMarc Zyngier { 49233dfa576bSMarc Zyngier int its_number; 49243dfa576bSMarc Zyngier u32 ctlr; 49253dfa576bSMarc Zyngier 49263dfa576bSMarc Zyngier /* 49273dfa576bSMarc Zyngier * This is assumed to be done early enough that we're 49283dfa576bSMarc Zyngier * guaranteed to be single-threaded, hence no 49293dfa576bSMarc Zyngier * locking. Should this change, we should address 49303dfa576bSMarc Zyngier * this. 49313dfa576bSMarc Zyngier */ 4932ab60491eSMarc Zyngier its_number = find_first_zero_bit(&its_list_map, GICv4_ITS_LIST_MAX); 4933ab60491eSMarc Zyngier if (its_number >= GICv4_ITS_LIST_MAX) { 49343dfa576bSMarc Zyngier pr_err("ITS@%pa: No ITSList entry available!\n", 49353dfa576bSMarc Zyngier &res->start); 49363dfa576bSMarc Zyngier return -EINVAL; 49373dfa576bSMarc Zyngier } 49383dfa576bSMarc Zyngier 49393dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 49403dfa576bSMarc Zyngier ctlr &= ~GITS_CTLR_ITS_NUMBER; 49413dfa576bSMarc Zyngier ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; 49423dfa576bSMarc Zyngier writel_relaxed(ctlr, its_base + GITS_CTLR); 49433dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 49443dfa576bSMarc Zyngier if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { 49453dfa576bSMarc Zyngier its_number = ctlr & GITS_CTLR_ITS_NUMBER; 49463dfa576bSMarc Zyngier its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; 49473dfa576bSMarc Zyngier } 49483dfa576bSMarc Zyngier 49493dfa576bSMarc Zyngier if (test_and_set_bit(its_number, &its_list_map)) { 49503dfa576bSMarc Zyngier pr_err("ITS@%pa: Duplicate ITSList entry %d\n", 49513dfa576bSMarc Zyngier &res->start, its_number); 49523dfa576bSMarc Zyngier return -EINVAL; 49533dfa576bSMarc Zyngier } 49543dfa576bSMarc Zyngier 49553dfa576bSMarc Zyngier return its_number; 49563dfa576bSMarc Zyngier } 49573dfa576bSMarc Zyngier 4958db40f0a7STomasz Nowicki static int __init its_probe_one(struct resource *res, 4959db40f0a7STomasz Nowicki struct fwnode_handle *handle, int numa_node) 49604c21f3c2SMarc Zyngier { 49614c21f3c2SMarc Zyngier struct its_node *its; 49624c21f3c2SMarc Zyngier void __iomem *its_base; 49633dfa576bSMarc Zyngier u32 val, ctlr; 49643dfa576bSMarc Zyngier u64 baser, tmp, typer; 4965539d3782SShanker Donthineni struct page *page; 49664c21f3c2SMarc Zyngier int err; 49674c21f3c2SMarc Zyngier 49685e46a484SMarc Zyngier its_base = ioremap(res->start, SZ_64K); 49694c21f3c2SMarc Zyngier if (!its_base) { 4970db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); 49714c21f3c2SMarc Zyngier return -ENOMEM; 49724c21f3c2SMarc Zyngier } 49734c21f3c2SMarc Zyngier 49744c21f3c2SMarc Zyngier val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; 49754c21f3c2SMarc Zyngier if (val != 0x30 && val != 0x40) { 4976db40f0a7STomasz Nowicki pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); 49774c21f3c2SMarc Zyngier err = -ENODEV; 49784c21f3c2SMarc Zyngier goto out_unmap; 49794c21f3c2SMarc Zyngier } 49804c21f3c2SMarc Zyngier 49814559fbb3SYun Wu err = its_force_quiescent(its_base); 49824559fbb3SYun Wu if (err) { 4983db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); 49844559fbb3SYun Wu goto out_unmap; 49854559fbb3SYun Wu } 49864559fbb3SYun Wu 4987db40f0a7STomasz Nowicki pr_info("ITS %pR\n", res); 49884c21f3c2SMarc Zyngier 49894c21f3c2SMarc Zyngier its = kzalloc(sizeof(*its), GFP_KERNEL); 49904c21f3c2SMarc Zyngier if (!its) { 49914c21f3c2SMarc Zyngier err = -ENOMEM; 49924c21f3c2SMarc Zyngier goto out_unmap; 49934c21f3c2SMarc Zyngier } 49944c21f3c2SMarc Zyngier 49954c21f3c2SMarc Zyngier raw_spin_lock_init(&its->lock); 49969791ec7dSMarc Zyngier mutex_init(&its->dev_alloc_lock); 49974c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->entry); 49984c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->its_device_list); 49993dfa576bSMarc Zyngier typer = gic_read_typer(its_base + GITS_TYPER); 50000dd57fedSMarc Zyngier its->typer = typer; 50014c21f3c2SMarc Zyngier its->base = its_base; 5002db40f0a7STomasz Nowicki its->phys_base = res->start; 50030dd57fedSMarc Zyngier if (is_v4(its)) { 50043dfa576bSMarc Zyngier if (!(typer & GITS_TYPER_VMOVP)) { 50053dfa576bSMarc Zyngier err = its_compute_its_list_map(res, its_base); 50063dfa576bSMarc Zyngier if (err < 0) 50073dfa576bSMarc Zyngier goto out_free_its; 50083dfa576bSMarc Zyngier 5009debf6d02SMarc Zyngier its->list_nr = err; 5010debf6d02SMarc Zyngier 50113dfa576bSMarc Zyngier pr_info("ITS@%pa: Using ITS number %d\n", 50123dfa576bSMarc Zyngier &res->start, err); 50133dfa576bSMarc Zyngier } else { 50143dfa576bSMarc Zyngier pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); 50153dfa576bSMarc Zyngier } 50165e516846SMarc Zyngier 50175e516846SMarc Zyngier if (is_v4_1(its)) { 50185e516846SMarc Zyngier u32 svpet = FIELD_GET(GITS_TYPER_SVPET, typer); 50195e46a484SMarc Zyngier 50205e46a484SMarc Zyngier its->sgir_base = ioremap(res->start + SZ_128K, SZ_64K); 50215e46a484SMarc Zyngier if (!its->sgir_base) { 50225e46a484SMarc Zyngier err = -ENOMEM; 50235e46a484SMarc Zyngier goto out_free_its; 50245e46a484SMarc Zyngier } 50255e46a484SMarc Zyngier 50265e516846SMarc Zyngier its->mpidr = readl_relaxed(its_base + GITS_MPIDR); 50275e516846SMarc Zyngier 50285e516846SMarc Zyngier pr_info("ITS@%pa: Using GICv4.1 mode %08x %08x\n", 50295e516846SMarc Zyngier &res->start, its->mpidr, svpet); 50305e516846SMarc Zyngier } 50313dfa576bSMarc Zyngier } 50323dfa576bSMarc Zyngier 5033db40f0a7STomasz Nowicki its->numa_node = numa_node; 50344c21f3c2SMarc Zyngier 5035539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, 50365bc13c2cSRobert Richter get_order(ITS_CMD_QUEUE_SZ)); 5037539d3782SShanker Donthineni if (!page) { 50384c21f3c2SMarc Zyngier err = -ENOMEM; 50395e46a484SMarc Zyngier goto out_unmap_sgir; 50404c21f3c2SMarc Zyngier } 5041539d3782SShanker Donthineni its->cmd_base = (void *)page_address(page); 50424c21f3c2SMarc Zyngier its->cmd_write = its->cmd_base; 5043558b0165SArd Biesheuvel its->fwnode_handle = handle; 5044558b0165SArd Biesheuvel its->get_msi_base = its_irq_get_msi_base; 5045558b0165SArd Biesheuvel its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP; 50464c21f3c2SMarc Zyngier 504767510ccaSRobert Richter its_enable_quirks(its); 504867510ccaSRobert Richter 50490e0b0f69SShanker Donthineni err = its_alloc_tables(its); 50504c21f3c2SMarc Zyngier if (err) 50514c21f3c2SMarc Zyngier goto out_free_cmd; 50524c21f3c2SMarc Zyngier 50534c21f3c2SMarc Zyngier err = its_alloc_collections(its); 50544c21f3c2SMarc Zyngier if (err) 50554c21f3c2SMarc Zyngier goto out_free_tables; 50564c21f3c2SMarc Zyngier 50574c21f3c2SMarc Zyngier baser = (virt_to_phys(its->cmd_base) | 50582fd632a0SShanker Donthineni GITS_CBASER_RaWaWb | 50594c21f3c2SMarc Zyngier GITS_CBASER_InnerShareable | 50604c21f3c2SMarc Zyngier (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | 50614c21f3c2SMarc Zyngier GITS_CBASER_VALID); 50624c21f3c2SMarc Zyngier 50630968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 50640968a619SVladimir Murzin tmp = gits_read_cbaser(its->base + GITS_CBASER); 50654c21f3c2SMarc Zyngier 50664ad3e363SMarc Zyngier if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { 5067241a386cSMarc Zyngier if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { 5068241a386cSMarc Zyngier /* 5069241a386cSMarc Zyngier * The HW reports non-shareable, we must 5070241a386cSMarc Zyngier * remove the cacheability attributes as 5071241a386cSMarc Zyngier * well. 5072241a386cSMarc Zyngier */ 5073241a386cSMarc Zyngier baser &= ~(GITS_CBASER_SHAREABILITY_MASK | 5074241a386cSMarc Zyngier GITS_CBASER_CACHEABILITY_MASK); 5075241a386cSMarc Zyngier baser |= GITS_CBASER_nC; 50760968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 5077241a386cSMarc Zyngier } 50784c21f3c2SMarc Zyngier pr_info("ITS: using cache flushing for cmd queue\n"); 50794c21f3c2SMarc Zyngier its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; 50804c21f3c2SMarc Zyngier } 50814c21f3c2SMarc Zyngier 50820968a619SVladimir Murzin gits_write_cwriter(0, its->base + GITS_CWRITER); 50833dfa576bSMarc Zyngier ctlr = readl_relaxed(its->base + GITS_CTLR); 5084d51c4b4dSMarc Zyngier ctlr |= GITS_CTLR_ENABLE; 50850dd57fedSMarc Zyngier if (is_v4(its)) 5086d51c4b4dSMarc Zyngier ctlr |= GITS_CTLR_ImDe; 5087d51c4b4dSMarc Zyngier writel_relaxed(ctlr, its->base + GITS_CTLR); 5088241a386cSMarc Zyngier 5089db40f0a7STomasz Nowicki err = its_init_domain(handle, its); 5090d14ae5e6STomasz Nowicki if (err) 509154456db9SMarc Zyngier goto out_free_tables; 50924c21f3c2SMarc Zyngier 5093a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 50944c21f3c2SMarc Zyngier list_add(&its->entry, &its_nodes); 5095a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 50964c21f3c2SMarc Zyngier 50974c21f3c2SMarc Zyngier return 0; 50984c21f3c2SMarc Zyngier 50994c21f3c2SMarc Zyngier out_free_tables: 51004c21f3c2SMarc Zyngier its_free_tables(its); 51014c21f3c2SMarc Zyngier out_free_cmd: 51025bc13c2cSRobert Richter free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); 51035e46a484SMarc Zyngier out_unmap_sgir: 51045e46a484SMarc Zyngier if (its->sgir_base) 51055e46a484SMarc Zyngier iounmap(its->sgir_base); 51064c21f3c2SMarc Zyngier out_free_its: 51074c21f3c2SMarc Zyngier kfree(its); 51084c21f3c2SMarc Zyngier out_unmap: 51094c21f3c2SMarc Zyngier iounmap(its_base); 5110db40f0a7STomasz Nowicki pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); 51114c21f3c2SMarc Zyngier return err; 51124c21f3c2SMarc Zyngier } 51134c21f3c2SMarc Zyngier 51144c21f3c2SMarc Zyngier static bool gic_rdists_supports_plpis(void) 51154c21f3c2SMarc Zyngier { 5116589ce5f4SMarc Zyngier return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); 51174c21f3c2SMarc Zyngier } 51184c21f3c2SMarc Zyngier 51196eb486b6SShanker Donthineni static int redist_disable_lpis(void) 51204c21f3c2SMarc Zyngier { 51216eb486b6SShanker Donthineni void __iomem *rbase = gic_data_rdist_rd_base(); 51226eb486b6SShanker Donthineni u64 timeout = USEC_PER_SEC; 51236eb486b6SShanker Donthineni u64 val; 51246eb486b6SShanker Donthineni 51254c21f3c2SMarc Zyngier if (!gic_rdists_supports_plpis()) { 51264c21f3c2SMarc Zyngier pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); 51274c21f3c2SMarc Zyngier return -ENXIO; 51284c21f3c2SMarc Zyngier } 51296eb486b6SShanker Donthineni 51306eb486b6SShanker Donthineni val = readl_relaxed(rbase + GICR_CTLR); 51316eb486b6SShanker Donthineni if (!(val & GICR_CTLR_ENABLE_LPIS)) 51326eb486b6SShanker Donthineni return 0; 51336eb486b6SShanker Donthineni 513411e37d35SMarc Zyngier /* 513511e37d35SMarc Zyngier * If coming via a CPU hotplug event, we don't need to disable 513611e37d35SMarc Zyngier * LPIs before trying to re-enable them. They are already 513711e37d35SMarc Zyngier * configured and all is well in the world. 5138c440a9d9SMarc Zyngier * 5139c440a9d9SMarc Zyngier * If running with preallocated tables, there is nothing to do. 514011e37d35SMarc Zyngier */ 5141c440a9d9SMarc Zyngier if (gic_data_rdist()->lpi_enabled || 5142c440a9d9SMarc Zyngier (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED)) 514311e37d35SMarc Zyngier return 0; 514411e37d35SMarc Zyngier 514511e37d35SMarc Zyngier /* 514611e37d35SMarc Zyngier * From that point on, we only try to do some damage control. 514711e37d35SMarc Zyngier */ 514811e37d35SMarc Zyngier pr_warn("GICv3: CPU%d: Booted with LPIs enabled, memory probably corrupted\n", 51496eb486b6SShanker Donthineni smp_processor_id()); 51506eb486b6SShanker Donthineni add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 51516eb486b6SShanker Donthineni 51526eb486b6SShanker Donthineni /* Disable LPIs */ 51536eb486b6SShanker Donthineni val &= ~GICR_CTLR_ENABLE_LPIS; 51546eb486b6SShanker Donthineni writel_relaxed(val, rbase + GICR_CTLR); 51556eb486b6SShanker Donthineni 51566eb486b6SShanker Donthineni /* Make sure any change to GICR_CTLR is observable by the GIC */ 51576eb486b6SShanker Donthineni dsb(sy); 51586eb486b6SShanker Donthineni 51596eb486b6SShanker Donthineni /* 51606eb486b6SShanker Donthineni * Software must observe RWP==0 after clearing GICR_CTLR.EnableLPIs 51616eb486b6SShanker Donthineni * from 1 to 0 before programming GICR_PEND{PROP}BASER registers. 51626eb486b6SShanker Donthineni * Error out if we time out waiting for RWP to clear. 51636eb486b6SShanker Donthineni */ 51646eb486b6SShanker Donthineni while (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_RWP) { 51656eb486b6SShanker Donthineni if (!timeout) { 51666eb486b6SShanker Donthineni pr_err("CPU%d: Timeout while disabling LPIs\n", 51676eb486b6SShanker Donthineni smp_processor_id()); 51686eb486b6SShanker Donthineni return -ETIMEDOUT; 51696eb486b6SShanker Donthineni } 51706eb486b6SShanker Donthineni udelay(1); 51716eb486b6SShanker Donthineni timeout--; 51726eb486b6SShanker Donthineni } 51736eb486b6SShanker Donthineni 51746eb486b6SShanker Donthineni /* 51756eb486b6SShanker Donthineni * After it has been written to 1, it is IMPLEMENTATION 51766eb486b6SShanker Donthineni * DEFINED whether GICR_CTLR.EnableLPI becomes RES1 or can be 51776eb486b6SShanker Donthineni * cleared to 0. Error out if clearing the bit failed. 51786eb486b6SShanker Donthineni */ 51796eb486b6SShanker Donthineni if (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_ENABLE_LPIS) { 51806eb486b6SShanker Donthineni pr_err("CPU%d: Failed to disable LPIs\n", smp_processor_id()); 51816eb486b6SShanker Donthineni return -EBUSY; 51826eb486b6SShanker Donthineni } 51836eb486b6SShanker Donthineni 51846eb486b6SShanker Donthineni return 0; 51856eb486b6SShanker Donthineni } 51866eb486b6SShanker Donthineni 51876eb486b6SShanker Donthineni int its_cpu_init(void) 51886eb486b6SShanker Donthineni { 51896eb486b6SShanker Donthineni if (!list_empty(&its_nodes)) { 51906eb486b6SShanker Donthineni int ret; 51916eb486b6SShanker Donthineni 51926eb486b6SShanker Donthineni ret = redist_disable_lpis(); 51936eb486b6SShanker Donthineni if (ret) 51946eb486b6SShanker Donthineni return ret; 51956eb486b6SShanker Donthineni 51964c21f3c2SMarc Zyngier its_cpu_init_lpis(); 5197920181ceSDerek Basehore its_cpu_init_collections(); 51984c21f3c2SMarc Zyngier } 51994c21f3c2SMarc Zyngier 52004c21f3c2SMarc Zyngier return 0; 52014c21f3c2SMarc Zyngier } 52024c21f3c2SMarc Zyngier 5203935bba7cSArvind Yadav static const struct of_device_id its_device_id[] = { 52044c21f3c2SMarc Zyngier { .compatible = "arm,gic-v3-its", }, 52054c21f3c2SMarc Zyngier {}, 52064c21f3c2SMarc Zyngier }; 52074c21f3c2SMarc Zyngier 5208db40f0a7STomasz Nowicki static int __init its_of_probe(struct device_node *node) 52094c21f3c2SMarc Zyngier { 52104c21f3c2SMarc Zyngier struct device_node *np; 5211db40f0a7STomasz Nowicki struct resource res; 52124c21f3c2SMarc Zyngier 52134c21f3c2SMarc Zyngier for (np = of_find_matching_node(node, its_device_id); np; 52144c21f3c2SMarc Zyngier np = of_find_matching_node(np, its_device_id)) { 521595a25625SStephen Boyd if (!of_device_is_available(np)) 521695a25625SStephen Boyd continue; 5217d14ae5e6STomasz Nowicki if (!of_property_read_bool(np, "msi-controller")) { 5218e81f54c6SRob Herring pr_warn("%pOF: no msi-controller property, ITS ignored\n", 5219e81f54c6SRob Herring np); 5220d14ae5e6STomasz Nowicki continue; 5221d14ae5e6STomasz Nowicki } 5222d14ae5e6STomasz Nowicki 5223db40f0a7STomasz Nowicki if (of_address_to_resource(np, 0, &res)) { 5224e81f54c6SRob Herring pr_warn("%pOF: no regs?\n", np); 5225db40f0a7STomasz Nowicki continue; 52264c21f3c2SMarc Zyngier } 52274c21f3c2SMarc Zyngier 5228db40f0a7STomasz Nowicki its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); 5229db40f0a7STomasz Nowicki } 5230db40f0a7STomasz Nowicki return 0; 5231db40f0a7STomasz Nowicki } 5232db40f0a7STomasz Nowicki 52333f010cf1STomasz Nowicki #ifdef CONFIG_ACPI 52343f010cf1STomasz Nowicki 52353f010cf1STomasz Nowicki #define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) 52363f010cf1STomasz Nowicki 5237d1ce263fSRobert Richter #ifdef CONFIG_ACPI_NUMA 5238dbd2b826SGanapatrao Kulkarni struct its_srat_map { 5239dbd2b826SGanapatrao Kulkarni /* numa node id */ 5240dbd2b826SGanapatrao Kulkarni u32 numa_node; 5241dbd2b826SGanapatrao Kulkarni /* GIC ITS ID */ 5242dbd2b826SGanapatrao Kulkarni u32 its_id; 5243dbd2b826SGanapatrao Kulkarni }; 5244dbd2b826SGanapatrao Kulkarni 5245fdf6e7a8SHanjun Guo static struct its_srat_map *its_srat_maps __initdata; 5246dbd2b826SGanapatrao Kulkarni static int its_in_srat __initdata; 5247dbd2b826SGanapatrao Kulkarni 5248dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) 5249dbd2b826SGanapatrao Kulkarni { 5250dbd2b826SGanapatrao Kulkarni int i; 5251dbd2b826SGanapatrao Kulkarni 5252dbd2b826SGanapatrao Kulkarni for (i = 0; i < its_in_srat; i++) { 5253dbd2b826SGanapatrao Kulkarni if (its_id == its_srat_maps[i].its_id) 5254dbd2b826SGanapatrao Kulkarni return its_srat_maps[i].numa_node; 5255dbd2b826SGanapatrao Kulkarni } 5256dbd2b826SGanapatrao Kulkarni return NUMA_NO_NODE; 5257dbd2b826SGanapatrao Kulkarni } 5258dbd2b826SGanapatrao Kulkarni 525960574d1eSKeith Busch static int __init gic_acpi_match_srat_its(union acpi_subtable_headers *header, 5260fdf6e7a8SHanjun Guo const unsigned long end) 5261fdf6e7a8SHanjun Guo { 5262fdf6e7a8SHanjun Guo return 0; 5263fdf6e7a8SHanjun Guo } 5264fdf6e7a8SHanjun Guo 526560574d1eSKeith Busch static int __init gic_acpi_parse_srat_its(union acpi_subtable_headers *header, 5266dbd2b826SGanapatrao Kulkarni const unsigned long end) 5267dbd2b826SGanapatrao Kulkarni { 5268dbd2b826SGanapatrao Kulkarni int node; 5269dbd2b826SGanapatrao Kulkarni struct acpi_srat_gic_its_affinity *its_affinity; 5270dbd2b826SGanapatrao Kulkarni 5271dbd2b826SGanapatrao Kulkarni its_affinity = (struct acpi_srat_gic_its_affinity *)header; 5272dbd2b826SGanapatrao Kulkarni if (!its_affinity) 5273dbd2b826SGanapatrao Kulkarni return -EINVAL; 5274dbd2b826SGanapatrao Kulkarni 5275dbd2b826SGanapatrao Kulkarni if (its_affinity->header.length < sizeof(*its_affinity)) { 5276dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid header length %d in ITS affinity\n", 5277dbd2b826SGanapatrao Kulkarni its_affinity->header.length); 5278dbd2b826SGanapatrao Kulkarni return -EINVAL; 5279dbd2b826SGanapatrao Kulkarni } 5280dbd2b826SGanapatrao Kulkarni 528195ac5bf4SJonathan Cameron /* 528295ac5bf4SJonathan Cameron * Note that in theory a new proximity node could be created by this 528395ac5bf4SJonathan Cameron * entry as it is an SRAT resource allocation structure. 528495ac5bf4SJonathan Cameron * We do not currently support doing so. 528595ac5bf4SJonathan Cameron */ 528695ac5bf4SJonathan Cameron node = pxm_to_node(its_affinity->proximity_domain); 5287dbd2b826SGanapatrao Kulkarni 5288dbd2b826SGanapatrao Kulkarni if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { 5289dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); 5290dbd2b826SGanapatrao Kulkarni return 0; 5291dbd2b826SGanapatrao Kulkarni } 5292dbd2b826SGanapatrao Kulkarni 5293dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].numa_node = node; 5294dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].its_id = its_affinity->its_id; 5295dbd2b826SGanapatrao Kulkarni its_in_srat++; 5296dbd2b826SGanapatrao Kulkarni pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", 5297dbd2b826SGanapatrao Kulkarni its_affinity->proximity_domain, its_affinity->its_id, node); 5298dbd2b826SGanapatrao Kulkarni 5299dbd2b826SGanapatrao Kulkarni return 0; 5300dbd2b826SGanapatrao Kulkarni } 5301dbd2b826SGanapatrao Kulkarni 5302dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) 5303dbd2b826SGanapatrao Kulkarni { 5304fdf6e7a8SHanjun Guo int count; 5305fdf6e7a8SHanjun Guo 5306fdf6e7a8SHanjun Guo count = acpi_table_parse_entries(ACPI_SIG_SRAT, 5307fdf6e7a8SHanjun Guo sizeof(struct acpi_table_srat), 5308fdf6e7a8SHanjun Guo ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 5309fdf6e7a8SHanjun Guo gic_acpi_match_srat_its, 0); 5310fdf6e7a8SHanjun Guo if (count <= 0) 5311fdf6e7a8SHanjun Guo return; 5312fdf6e7a8SHanjun Guo 53136da2ec56SKees Cook its_srat_maps = kmalloc_array(count, sizeof(struct its_srat_map), 5314fdf6e7a8SHanjun Guo GFP_KERNEL); 5315944a1a17SZhen Lei if (!its_srat_maps) 5316fdf6e7a8SHanjun Guo return; 5317fdf6e7a8SHanjun Guo 5318dbd2b826SGanapatrao Kulkarni acpi_table_parse_entries(ACPI_SIG_SRAT, 5319dbd2b826SGanapatrao Kulkarni sizeof(struct acpi_table_srat), 5320dbd2b826SGanapatrao Kulkarni ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 5321dbd2b826SGanapatrao Kulkarni gic_acpi_parse_srat_its, 0); 5322dbd2b826SGanapatrao Kulkarni } 5323fdf6e7a8SHanjun Guo 5324fdf6e7a8SHanjun Guo /* free the its_srat_maps after ITS probing */ 5325fdf6e7a8SHanjun Guo static void __init acpi_its_srat_maps_free(void) 5326fdf6e7a8SHanjun Guo { 5327fdf6e7a8SHanjun Guo kfree(its_srat_maps); 5328fdf6e7a8SHanjun Guo } 5329dbd2b826SGanapatrao Kulkarni #else 5330dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) { } 5331dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } 5332fdf6e7a8SHanjun Guo static void __init acpi_its_srat_maps_free(void) { } 5333dbd2b826SGanapatrao Kulkarni #endif 5334dbd2b826SGanapatrao Kulkarni 533560574d1eSKeith Busch static int __init gic_acpi_parse_madt_its(union acpi_subtable_headers *header, 53363f010cf1STomasz Nowicki const unsigned long end) 53373f010cf1STomasz Nowicki { 53383f010cf1STomasz Nowicki struct acpi_madt_generic_translator *its_entry; 53393f010cf1STomasz Nowicki struct fwnode_handle *dom_handle; 53403f010cf1STomasz Nowicki struct resource res; 53413f010cf1STomasz Nowicki int err; 53423f010cf1STomasz Nowicki 53433f010cf1STomasz Nowicki its_entry = (struct acpi_madt_generic_translator *)header; 53443f010cf1STomasz Nowicki memset(&res, 0, sizeof(res)); 53453f010cf1STomasz Nowicki res.start = its_entry->base_address; 53463f010cf1STomasz Nowicki res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; 53473f010cf1STomasz Nowicki res.flags = IORESOURCE_MEM; 53483f010cf1STomasz Nowicki 53495778cc77SMarc Zyngier dom_handle = irq_domain_alloc_fwnode(&res.start); 53503f010cf1STomasz Nowicki if (!dom_handle) { 53513f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", 53523f010cf1STomasz Nowicki &res.start); 53533f010cf1STomasz Nowicki return -ENOMEM; 53543f010cf1STomasz Nowicki } 53553f010cf1STomasz Nowicki 53568b4282e6SShameer Kolothum err = iort_register_domain_token(its_entry->translation_id, res.start, 53578b4282e6SShameer Kolothum dom_handle); 53583f010cf1STomasz Nowicki if (err) { 53593f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", 53603f010cf1STomasz Nowicki &res.start, its_entry->translation_id); 53613f010cf1STomasz Nowicki goto dom_err; 53623f010cf1STomasz Nowicki } 53633f010cf1STomasz Nowicki 5364dbd2b826SGanapatrao Kulkarni err = its_probe_one(&res, dom_handle, 5365dbd2b826SGanapatrao Kulkarni acpi_get_its_numa_node(its_entry->translation_id)); 53663f010cf1STomasz Nowicki if (!err) 53673f010cf1STomasz Nowicki return 0; 53683f010cf1STomasz Nowicki 53693f010cf1STomasz Nowicki iort_deregister_domain_token(its_entry->translation_id); 53703f010cf1STomasz Nowicki dom_err: 53713f010cf1STomasz Nowicki irq_domain_free_fwnode(dom_handle); 53723f010cf1STomasz Nowicki return err; 53733f010cf1STomasz Nowicki } 53743f010cf1STomasz Nowicki 53753f010cf1STomasz Nowicki static void __init its_acpi_probe(void) 53763f010cf1STomasz Nowicki { 5377dbd2b826SGanapatrao Kulkarni acpi_table_parse_srat_its(); 53783f010cf1STomasz Nowicki acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, 53793f010cf1STomasz Nowicki gic_acpi_parse_madt_its, 0); 5380fdf6e7a8SHanjun Guo acpi_its_srat_maps_free(); 53813f010cf1STomasz Nowicki } 53823f010cf1STomasz Nowicki #else 53833f010cf1STomasz Nowicki static void __init its_acpi_probe(void) { } 53843f010cf1STomasz Nowicki #endif 53853f010cf1STomasz Nowicki 5386db40f0a7STomasz Nowicki int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, 5387db40f0a7STomasz Nowicki struct irq_domain *parent_domain) 5388db40f0a7STomasz Nowicki { 5389db40f0a7STomasz Nowicki struct device_node *of_node; 53908fff27aeSMarc Zyngier struct its_node *its; 53918fff27aeSMarc Zyngier bool has_v4 = false; 53923c40706dSMarc Zyngier bool has_v4_1 = false; 53938fff27aeSMarc Zyngier int err; 5394db40f0a7STomasz Nowicki 53955e516846SMarc Zyngier gic_rdists = rdists; 53965e516846SMarc Zyngier 5397db40f0a7STomasz Nowicki its_parent = parent_domain; 5398db40f0a7STomasz Nowicki of_node = to_of_node(handle); 5399db40f0a7STomasz Nowicki if (of_node) 5400db40f0a7STomasz Nowicki its_of_probe(of_node); 5401db40f0a7STomasz Nowicki else 54023f010cf1STomasz Nowicki its_acpi_probe(); 5403db40f0a7STomasz Nowicki 54044c21f3c2SMarc Zyngier if (list_empty(&its_nodes)) { 54054c21f3c2SMarc Zyngier pr_warn("ITS: No ITS available, not enabling LPIs\n"); 54064c21f3c2SMarc Zyngier return -ENXIO; 54074c21f3c2SMarc Zyngier } 54084c21f3c2SMarc Zyngier 540911e37d35SMarc Zyngier err = allocate_lpi_tables(); 54108fff27aeSMarc Zyngier if (err) 54118fff27aeSMarc Zyngier return err; 54128fff27aeSMarc Zyngier 54133c40706dSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 54140dd57fedSMarc Zyngier has_v4 |= is_v4(its); 54153c40706dSMarc Zyngier has_v4_1 |= is_v4_1(its); 54163c40706dSMarc Zyngier } 54173c40706dSMarc Zyngier 54183c40706dSMarc Zyngier /* Don't bother with inconsistent systems */ 54193c40706dSMarc Zyngier if (WARN_ON(!has_v4_1 && rdists->has_rvpeid)) 54203c40706dSMarc Zyngier rdists->has_rvpeid = false; 54218fff27aeSMarc Zyngier 54228fff27aeSMarc Zyngier if (has_v4 & rdists->has_vlpis) { 5423166cba71SMarc Zyngier const struct irq_domain_ops *sgi_ops; 5424166cba71SMarc Zyngier 5425166cba71SMarc Zyngier if (has_v4_1) 5426166cba71SMarc Zyngier sgi_ops = &its_sgi_domain_ops; 5427166cba71SMarc Zyngier else 5428166cba71SMarc Zyngier sgi_ops = NULL; 5429166cba71SMarc Zyngier 54303d63cb53SMarc Zyngier if (its_init_vpe_domain() || 5431166cba71SMarc Zyngier its_init_v4(parent_domain, &its_vpe_domain_ops, sgi_ops)) { 54328fff27aeSMarc Zyngier rdists->has_vlpis = false; 54338fff27aeSMarc Zyngier pr_err("ITS: Disabling GICv4 support\n"); 54348fff27aeSMarc Zyngier } 54358fff27aeSMarc Zyngier } 54368fff27aeSMarc Zyngier 5437dba0bc7bSDerek Basehore register_syscore_ops(&its_syscore_ops); 5438dba0bc7bSDerek Basehore 54398fff27aeSMarc Zyngier return 0; 54404c21f3c2SMarc Zyngier } 5441