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> 173f010cf1STomasz Nowicki #include <linux/irqdomain.h> 18880cb3cdSMarc Zyngier #include <linux/list.h> 19cc2d3216SMarc Zyngier #include <linux/log2.h> 205e2c9f9aSMarc Zyngier #include <linux/memblock.h> 21cc2d3216SMarc Zyngier #include <linux/mm.h> 22cc2d3216SMarc Zyngier #include <linux/msi.h> 23cc2d3216SMarc Zyngier #include <linux/of.h> 24cc2d3216SMarc Zyngier #include <linux/of_address.h> 25cc2d3216SMarc Zyngier #include <linux/of_irq.h> 26cc2d3216SMarc Zyngier #include <linux/of_pci.h> 27cc2d3216SMarc Zyngier #include <linux/of_platform.h> 28cc2d3216SMarc Zyngier #include <linux/percpu.h> 29cc2d3216SMarc Zyngier #include <linux/slab.h> 30dba0bc7bSDerek Basehore #include <linux/syscore_ops.h> 31cc2d3216SMarc Zyngier 3241a83e06SJoel Porquet #include <linux/irqchip.h> 33cc2d3216SMarc Zyngier #include <linux/irqchip/arm-gic-v3.h> 34c808eea8SMarc Zyngier #include <linux/irqchip/arm-gic-v4.h> 35cc2d3216SMarc Zyngier 36cc2d3216SMarc Zyngier #include <asm/cputype.h> 37cc2d3216SMarc Zyngier #include <asm/exception.h> 38cc2d3216SMarc Zyngier 3967510ccaSRobert Richter #include "irq-gic-common.h" 4067510ccaSRobert Richter 4194100970SRobert Richter #define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) 4294100970SRobert Richter #define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) 43fbf8f40eSGanapatrao Kulkarni #define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2) 44dba0bc7bSDerek Basehore #define ITS_FLAGS_SAVE_SUSPEND_STATE (1ULL << 3) 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; 99db40f0a7STomasz Nowicki phys_addr_t phys_base; 100cc2d3216SMarc Zyngier struct its_cmd_block *cmd_base; 101cc2d3216SMarc Zyngier struct its_cmd_block *cmd_write; 102466b7d16SShanker Donthineni struct its_baser tables[GITS_BASER_NR_REGS]; 103cc2d3216SMarc Zyngier struct its_collection *collections; 104558b0165SArd Biesheuvel struct fwnode_handle *fwnode_handle; 105558b0165SArd Biesheuvel u64 (*get_msi_base)(struct its_device *its_dev); 1060dd57fedSMarc Zyngier u64 typer; 107dba0bc7bSDerek Basehore u64 cbaser_save; 108dba0bc7bSDerek Basehore u32 ctlr_save; 109cc2d3216SMarc Zyngier struct list_head its_device_list; 110cc2d3216SMarc Zyngier u64 flags; 111debf6d02SMarc Zyngier unsigned long list_nr; 112fbf8f40eSGanapatrao Kulkarni int numa_node; 113558b0165SArd Biesheuvel unsigned int msi_domain_flags; 114558b0165SArd Biesheuvel u32 pre_its_base; /* for Socionext Synquacer */ 1155c9a882eSMarc Zyngier int vlpi_redist_offset; 116cc2d3216SMarc Zyngier }; 117cc2d3216SMarc Zyngier 1180dd57fedSMarc Zyngier #define is_v4(its) (!!((its)->typer & GITS_TYPER_VLPIS)) 119576a8342SMarc Zyngier #define device_ids(its) (FIELD_GET(GITS_TYPER_DEVBITS, (its)->typer) + 1) 1200dd57fedSMarc Zyngier 121cc2d3216SMarc Zyngier #define ITS_ITT_ALIGN SZ_256 122cc2d3216SMarc Zyngier 12332bd44dcSShanker Donthineni /* The maximum number of VPEID bits supported by VLPI commands */ 12432bd44dcSShanker Donthineni #define ITS_MAX_VPEID_BITS (16) 12532bd44dcSShanker Donthineni #define ITS_MAX_VPEID (1 << (ITS_MAX_VPEID_BITS)) 12632bd44dcSShanker Donthineni 1272eca0d6cSShanker Donthineni /* Convert page order to size in bytes */ 1282eca0d6cSShanker Donthineni #define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o)) 1292eca0d6cSShanker Donthineni 130591e5becSMarc Zyngier struct event_lpi_map { 131591e5becSMarc Zyngier unsigned long *lpi_map; 132591e5becSMarc Zyngier u16 *col_map; 133591e5becSMarc Zyngier irq_hw_number_t lpi_base; 134591e5becSMarc Zyngier int nr_lpis; 135d011e4e6SMarc Zyngier struct mutex vlpi_lock; 136d011e4e6SMarc Zyngier struct its_vm *vm; 137d011e4e6SMarc Zyngier struct its_vlpi_map *vlpi_maps; 138d011e4e6SMarc Zyngier int nr_vlpis; 139591e5becSMarc Zyngier }; 140591e5becSMarc Zyngier 141cc2d3216SMarc Zyngier /* 142d011e4e6SMarc Zyngier * The ITS view of a device - belongs to an ITS, owns an interrupt 143d011e4e6SMarc Zyngier * translation table, and a list of interrupts. If it some of its 144d011e4e6SMarc Zyngier * LPIs are injected into a guest (GICv4), the event_map.vm field 145d011e4e6SMarc Zyngier * indicates which one. 146cc2d3216SMarc Zyngier */ 147cc2d3216SMarc Zyngier struct its_device { 148cc2d3216SMarc Zyngier struct list_head entry; 149cc2d3216SMarc Zyngier struct its_node *its; 150591e5becSMarc Zyngier struct event_lpi_map event_map; 151cc2d3216SMarc Zyngier void *itt; 152cc2d3216SMarc Zyngier u32 nr_ites; 153cc2d3216SMarc Zyngier u32 device_id; 1549791ec7dSMarc Zyngier bool shared; 155cc2d3216SMarc Zyngier }; 156cc2d3216SMarc Zyngier 15720b3d54eSMarc Zyngier static struct { 15820b3d54eSMarc Zyngier raw_spinlock_t lock; 15920b3d54eSMarc Zyngier struct its_device *dev; 16020b3d54eSMarc Zyngier struct its_vpe **vpes; 16120b3d54eSMarc Zyngier int next_victim; 16220b3d54eSMarc Zyngier } vpe_proxy; 16320b3d54eSMarc Zyngier 1641ac19ca6SMarc Zyngier static LIST_HEAD(its_nodes); 165a8db7456SSebastian Andrzej Siewior static DEFINE_RAW_SPINLOCK(its_lock); 1661ac19ca6SMarc Zyngier static struct rdists *gic_rdists; 167db40f0a7STomasz Nowicki static struct irq_domain *its_parent; 1681ac19ca6SMarc Zyngier 1693dfa576bSMarc Zyngier static unsigned long its_list_map; 1703171a47aSMarc Zyngier static u16 vmovp_seq_num; 1713171a47aSMarc Zyngier static DEFINE_RAW_SPINLOCK(vmovp_lock); 1723171a47aSMarc Zyngier 1737d75bbb4SMarc Zyngier static DEFINE_IDA(its_vpeid_ida); 1743dfa576bSMarc Zyngier 1751ac19ca6SMarc Zyngier #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) 17611e37d35SMarc Zyngier #define gic_data_rdist_cpu(cpu) (per_cpu_ptr(gic_rdists->rdist, cpu)) 1771ac19ca6SMarc Zyngier #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) 178e643d803SMarc Zyngier #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) 1791ac19ca6SMarc Zyngier 18084243125SZenghui Yu static u16 get_its_list(struct its_vm *vm) 18184243125SZenghui Yu { 18284243125SZenghui Yu struct its_node *its; 18384243125SZenghui Yu unsigned long its_list = 0; 18484243125SZenghui Yu 18584243125SZenghui Yu list_for_each_entry(its, &its_nodes, entry) { 1860dd57fedSMarc Zyngier if (!is_v4(its)) 18784243125SZenghui Yu continue; 18884243125SZenghui Yu 18984243125SZenghui Yu if (vm->vlpi_count[its->list_nr]) 19084243125SZenghui Yu __set_bit(its->list_nr, &its_list); 19184243125SZenghui Yu } 19284243125SZenghui Yu 19384243125SZenghui Yu return (u16)its_list; 19484243125SZenghui Yu } 19584243125SZenghui Yu 196425c09beSMarc Zyngier static inline u32 its_get_event_id(struct irq_data *d) 197425c09beSMarc Zyngier { 198425c09beSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 199425c09beSMarc Zyngier return d->hwirq - its_dev->event_map.lpi_base; 200425c09beSMarc Zyngier } 201425c09beSMarc Zyngier 202591e5becSMarc Zyngier static struct its_collection *dev_event_to_col(struct its_device *its_dev, 203591e5becSMarc Zyngier u32 event) 204591e5becSMarc Zyngier { 205591e5becSMarc Zyngier struct its_node *its = its_dev->its; 206591e5becSMarc Zyngier 207591e5becSMarc Zyngier return its->collections + its_dev->event_map.col_map[event]; 208591e5becSMarc Zyngier } 209591e5becSMarc Zyngier 210c1d4d5cdSMarc Zyngier static struct its_vlpi_map *dev_event_to_vlpi_map(struct its_device *its_dev, 211c1d4d5cdSMarc Zyngier u32 event) 212c1d4d5cdSMarc Zyngier { 213c1d4d5cdSMarc Zyngier if (WARN_ON_ONCE(event >= its_dev->event_map.nr_lpis)) 214c1d4d5cdSMarc Zyngier return NULL; 215c1d4d5cdSMarc Zyngier 216c1d4d5cdSMarc Zyngier return &its_dev->event_map.vlpi_maps[event]; 217c1d4d5cdSMarc Zyngier } 218c1d4d5cdSMarc Zyngier 219425c09beSMarc Zyngier static struct its_collection *irq_to_col(struct irq_data *d) 220425c09beSMarc Zyngier { 221425c09beSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 222425c09beSMarc Zyngier 223425c09beSMarc Zyngier return dev_event_to_col(its_dev, its_get_event_id(d)); 224425c09beSMarc Zyngier } 225425c09beSMarc Zyngier 22683559b47SMarc Zyngier static struct its_collection *valid_col(struct its_collection *col) 22783559b47SMarc Zyngier { 22820faba84SJoe Perches if (WARN_ON_ONCE(col->target_address & GENMASK_ULL(15, 0))) 22983559b47SMarc Zyngier return NULL; 23083559b47SMarc Zyngier 23183559b47SMarc Zyngier return col; 23283559b47SMarc Zyngier } 23383559b47SMarc Zyngier 234205e065dSMarc Zyngier static struct its_vpe *valid_vpe(struct its_node *its, struct its_vpe *vpe) 235205e065dSMarc Zyngier { 236205e065dSMarc Zyngier if (valid_col(its->collections + vpe->col_idx)) 237205e065dSMarc Zyngier return vpe; 238205e065dSMarc Zyngier 239205e065dSMarc Zyngier return NULL; 240205e065dSMarc Zyngier } 241205e065dSMarc Zyngier 242cc2d3216SMarc Zyngier /* 243cc2d3216SMarc Zyngier * ITS command descriptors - parameters to be encoded in a command 244cc2d3216SMarc Zyngier * block. 245cc2d3216SMarc Zyngier */ 246cc2d3216SMarc Zyngier struct its_cmd_desc { 247cc2d3216SMarc Zyngier union { 248cc2d3216SMarc Zyngier struct { 249cc2d3216SMarc Zyngier struct its_device *dev; 250cc2d3216SMarc Zyngier u32 event_id; 251cc2d3216SMarc Zyngier } its_inv_cmd; 252cc2d3216SMarc Zyngier 253cc2d3216SMarc Zyngier struct { 254cc2d3216SMarc Zyngier struct its_device *dev; 255cc2d3216SMarc Zyngier u32 event_id; 2568d85dcedSMarc Zyngier } its_clear_cmd; 2578d85dcedSMarc Zyngier 2588d85dcedSMarc Zyngier struct { 2598d85dcedSMarc Zyngier struct its_device *dev; 2608d85dcedSMarc Zyngier u32 event_id; 261cc2d3216SMarc Zyngier } its_int_cmd; 262cc2d3216SMarc Zyngier 263cc2d3216SMarc Zyngier struct { 264cc2d3216SMarc Zyngier struct its_device *dev; 265cc2d3216SMarc Zyngier int valid; 266cc2d3216SMarc Zyngier } its_mapd_cmd; 267cc2d3216SMarc Zyngier 268cc2d3216SMarc Zyngier struct { 269cc2d3216SMarc Zyngier struct its_collection *col; 270cc2d3216SMarc Zyngier int valid; 271cc2d3216SMarc Zyngier } its_mapc_cmd; 272cc2d3216SMarc Zyngier 273cc2d3216SMarc Zyngier struct { 274cc2d3216SMarc Zyngier struct its_device *dev; 275cc2d3216SMarc Zyngier u32 phys_id; 276cc2d3216SMarc Zyngier u32 event_id; 2776a25ad3aSMarc Zyngier } its_mapti_cmd; 278cc2d3216SMarc Zyngier 279cc2d3216SMarc Zyngier struct { 280cc2d3216SMarc Zyngier struct its_device *dev; 281cc2d3216SMarc Zyngier struct its_collection *col; 282591e5becSMarc Zyngier u32 event_id; 283cc2d3216SMarc Zyngier } its_movi_cmd; 284cc2d3216SMarc Zyngier 285cc2d3216SMarc Zyngier struct { 286cc2d3216SMarc Zyngier struct its_device *dev; 287cc2d3216SMarc Zyngier u32 event_id; 288cc2d3216SMarc Zyngier } its_discard_cmd; 289cc2d3216SMarc Zyngier 290cc2d3216SMarc Zyngier struct { 291cc2d3216SMarc Zyngier struct its_collection *col; 292cc2d3216SMarc Zyngier } its_invall_cmd; 293d011e4e6SMarc Zyngier 294d011e4e6SMarc Zyngier struct { 295d011e4e6SMarc Zyngier struct its_vpe *vpe; 296eb78192bSMarc Zyngier } its_vinvall_cmd; 297eb78192bSMarc Zyngier 298eb78192bSMarc Zyngier struct { 299eb78192bSMarc Zyngier struct its_vpe *vpe; 300eb78192bSMarc Zyngier struct its_collection *col; 301eb78192bSMarc Zyngier bool valid; 302eb78192bSMarc Zyngier } its_vmapp_cmd; 303eb78192bSMarc Zyngier 304eb78192bSMarc Zyngier struct { 305eb78192bSMarc Zyngier struct its_vpe *vpe; 306d011e4e6SMarc Zyngier struct its_device *dev; 307d011e4e6SMarc Zyngier u32 virt_id; 308d011e4e6SMarc Zyngier u32 event_id; 309d011e4e6SMarc Zyngier bool db_enabled; 310d011e4e6SMarc Zyngier } its_vmapti_cmd; 311d011e4e6SMarc Zyngier 312d011e4e6SMarc Zyngier struct { 313d011e4e6SMarc Zyngier struct its_vpe *vpe; 314d011e4e6SMarc Zyngier struct its_device *dev; 315d011e4e6SMarc Zyngier u32 event_id; 316d011e4e6SMarc Zyngier bool db_enabled; 317d011e4e6SMarc Zyngier } its_vmovi_cmd; 3183171a47aSMarc Zyngier 3193171a47aSMarc Zyngier struct { 3203171a47aSMarc Zyngier struct its_vpe *vpe; 3213171a47aSMarc Zyngier struct its_collection *col; 3223171a47aSMarc Zyngier u16 seq_num; 3233171a47aSMarc Zyngier u16 its_list; 3243171a47aSMarc Zyngier } its_vmovp_cmd; 325cc2d3216SMarc Zyngier }; 326cc2d3216SMarc Zyngier }; 327cc2d3216SMarc Zyngier 328cc2d3216SMarc Zyngier /* 329cc2d3216SMarc Zyngier * The ITS command block, which is what the ITS actually parses. 330cc2d3216SMarc Zyngier */ 331cc2d3216SMarc Zyngier struct its_cmd_block { 3322bbdfcc5SBen Dooks (Codethink) union { 333cc2d3216SMarc Zyngier u64 raw_cmd[4]; 3342bbdfcc5SBen Dooks (Codethink) __le64 raw_cmd_le[4]; 3352bbdfcc5SBen Dooks (Codethink) }; 336cc2d3216SMarc Zyngier }; 337cc2d3216SMarc Zyngier 338cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_SZ SZ_64K 339cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) 340cc2d3216SMarc Zyngier 34167047f90SMarc Zyngier typedef struct its_collection *(*its_cmd_builder_t)(struct its_node *, 34267047f90SMarc Zyngier struct its_cmd_block *, 343cc2d3216SMarc Zyngier struct its_cmd_desc *); 344cc2d3216SMarc Zyngier 34567047f90SMarc Zyngier typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_node *, 34667047f90SMarc Zyngier struct its_cmd_block *, 347d011e4e6SMarc Zyngier struct its_cmd_desc *); 348d011e4e6SMarc Zyngier 3494d36f136SMarc Zyngier static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) 3504d36f136SMarc Zyngier { 3514d36f136SMarc Zyngier u64 mask = GENMASK_ULL(h, l); 3524d36f136SMarc Zyngier *raw_cmd &= ~mask; 3534d36f136SMarc Zyngier *raw_cmd |= (val << l) & mask; 3544d36f136SMarc Zyngier } 3554d36f136SMarc Zyngier 356cc2d3216SMarc Zyngier static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) 357cc2d3216SMarc Zyngier { 3584d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); 359cc2d3216SMarc Zyngier } 360cc2d3216SMarc Zyngier 361cc2d3216SMarc Zyngier static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) 362cc2d3216SMarc Zyngier { 3634d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); 364cc2d3216SMarc Zyngier } 365cc2d3216SMarc Zyngier 366cc2d3216SMarc Zyngier static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) 367cc2d3216SMarc Zyngier { 3684d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); 369cc2d3216SMarc Zyngier } 370cc2d3216SMarc Zyngier 371cc2d3216SMarc Zyngier static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) 372cc2d3216SMarc Zyngier { 3734d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); 374cc2d3216SMarc Zyngier } 375cc2d3216SMarc Zyngier 376cc2d3216SMarc Zyngier static void its_encode_size(struct its_cmd_block *cmd, u8 size) 377cc2d3216SMarc Zyngier { 3784d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); 379cc2d3216SMarc Zyngier } 380cc2d3216SMarc Zyngier 381cc2d3216SMarc Zyngier static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) 382cc2d3216SMarc Zyngier { 38330ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 51, 8); 384cc2d3216SMarc Zyngier } 385cc2d3216SMarc Zyngier 386cc2d3216SMarc Zyngier static void its_encode_valid(struct its_cmd_block *cmd, int valid) 387cc2d3216SMarc Zyngier { 3884d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); 389cc2d3216SMarc Zyngier } 390cc2d3216SMarc Zyngier 391cc2d3216SMarc Zyngier static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) 392cc2d3216SMarc Zyngier { 39330ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 51, 16); 394cc2d3216SMarc Zyngier } 395cc2d3216SMarc Zyngier 396cc2d3216SMarc Zyngier static void its_encode_collection(struct its_cmd_block *cmd, u16 col) 397cc2d3216SMarc Zyngier { 3984d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); 399cc2d3216SMarc Zyngier } 400cc2d3216SMarc Zyngier 401d011e4e6SMarc Zyngier static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) 402d011e4e6SMarc Zyngier { 403d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); 404d011e4e6SMarc Zyngier } 405d011e4e6SMarc Zyngier 406d011e4e6SMarc Zyngier static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) 407d011e4e6SMarc Zyngier { 408d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); 409d011e4e6SMarc Zyngier } 410d011e4e6SMarc Zyngier 411d011e4e6SMarc Zyngier static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) 412d011e4e6SMarc Zyngier { 413d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); 414d011e4e6SMarc Zyngier } 415d011e4e6SMarc Zyngier 416d011e4e6SMarc Zyngier static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) 417d011e4e6SMarc Zyngier { 418d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); 419d011e4e6SMarc Zyngier } 420d011e4e6SMarc Zyngier 4213171a47aSMarc Zyngier static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) 4223171a47aSMarc Zyngier { 4233171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); 4243171a47aSMarc Zyngier } 4253171a47aSMarc Zyngier 4263171a47aSMarc Zyngier static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) 4273171a47aSMarc Zyngier { 4283171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); 4293171a47aSMarc Zyngier } 4303171a47aSMarc Zyngier 431eb78192bSMarc Zyngier static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) 432eb78192bSMarc Zyngier { 43330ae9610SShanker Donthineni its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 51, 16); 434eb78192bSMarc Zyngier } 435eb78192bSMarc Zyngier 436eb78192bSMarc Zyngier static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) 437eb78192bSMarc Zyngier { 438eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); 439eb78192bSMarc Zyngier } 440eb78192bSMarc Zyngier 441cc2d3216SMarc Zyngier static inline void its_fixup_cmd(struct its_cmd_block *cmd) 442cc2d3216SMarc Zyngier { 443cc2d3216SMarc Zyngier /* Let's fixup BE commands */ 4442bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[0] = cpu_to_le64(cmd->raw_cmd[0]); 4452bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[1] = cpu_to_le64(cmd->raw_cmd[1]); 4462bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[2] = cpu_to_le64(cmd->raw_cmd[2]); 4472bbdfcc5SBen Dooks (Codethink) cmd->raw_cmd_le[3] = cpu_to_le64(cmd->raw_cmd[3]); 448cc2d3216SMarc Zyngier } 449cc2d3216SMarc Zyngier 45067047f90SMarc Zyngier static struct its_collection *its_build_mapd_cmd(struct its_node *its, 45167047f90SMarc Zyngier struct its_cmd_block *cmd, 452cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 453cc2d3216SMarc Zyngier { 454cc2d3216SMarc Zyngier unsigned long itt_addr; 455c8481267SMarc Zyngier u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); 456cc2d3216SMarc Zyngier 457cc2d3216SMarc Zyngier itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); 458cc2d3216SMarc Zyngier itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); 459cc2d3216SMarc Zyngier 460cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPD); 461cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); 462cc2d3216SMarc Zyngier its_encode_size(cmd, size - 1); 463cc2d3216SMarc Zyngier its_encode_itt(cmd, itt_addr); 464cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapd_cmd.valid); 465cc2d3216SMarc Zyngier 466cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 467cc2d3216SMarc Zyngier 468591e5becSMarc Zyngier return NULL; 469cc2d3216SMarc Zyngier } 470cc2d3216SMarc Zyngier 47167047f90SMarc Zyngier static struct its_collection *its_build_mapc_cmd(struct its_node *its, 47267047f90SMarc Zyngier struct its_cmd_block *cmd, 473cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 474cc2d3216SMarc Zyngier { 475cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPC); 476cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 477cc2d3216SMarc Zyngier its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); 478cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapc_cmd.valid); 479cc2d3216SMarc Zyngier 480cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 481cc2d3216SMarc Zyngier 482cc2d3216SMarc Zyngier return desc->its_mapc_cmd.col; 483cc2d3216SMarc Zyngier } 484cc2d3216SMarc Zyngier 48567047f90SMarc Zyngier static struct its_collection *its_build_mapti_cmd(struct its_node *its, 48667047f90SMarc Zyngier struct its_cmd_block *cmd, 487cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 488cc2d3216SMarc Zyngier { 489591e5becSMarc Zyngier struct its_collection *col; 490591e5becSMarc Zyngier 4916a25ad3aSMarc Zyngier col = dev_event_to_col(desc->its_mapti_cmd.dev, 4926a25ad3aSMarc Zyngier desc->its_mapti_cmd.event_id); 493591e5becSMarc Zyngier 4946a25ad3aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPTI); 4956a25ad3aSMarc Zyngier its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); 4966a25ad3aSMarc Zyngier its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); 4976a25ad3aSMarc Zyngier its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); 498591e5becSMarc Zyngier its_encode_collection(cmd, col->col_id); 499cc2d3216SMarc Zyngier 500cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 501cc2d3216SMarc Zyngier 50283559b47SMarc Zyngier return valid_col(col); 503cc2d3216SMarc Zyngier } 504cc2d3216SMarc Zyngier 50567047f90SMarc Zyngier static struct its_collection *its_build_movi_cmd(struct its_node *its, 50667047f90SMarc Zyngier struct its_cmd_block *cmd, 507cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 508cc2d3216SMarc Zyngier { 509591e5becSMarc Zyngier struct its_collection *col; 510591e5becSMarc Zyngier 511591e5becSMarc Zyngier col = dev_event_to_col(desc->its_movi_cmd.dev, 512591e5becSMarc Zyngier desc->its_movi_cmd.event_id); 513591e5becSMarc Zyngier 514cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MOVI); 515cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); 516591e5becSMarc Zyngier its_encode_event_id(cmd, desc->its_movi_cmd.event_id); 517cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); 518cc2d3216SMarc Zyngier 519cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 520cc2d3216SMarc Zyngier 52183559b47SMarc Zyngier return valid_col(col); 522cc2d3216SMarc Zyngier } 523cc2d3216SMarc Zyngier 52467047f90SMarc Zyngier static struct its_collection *its_build_discard_cmd(struct its_node *its, 52567047f90SMarc Zyngier struct its_cmd_block *cmd, 526cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 527cc2d3216SMarc Zyngier { 528591e5becSMarc Zyngier struct its_collection *col; 529591e5becSMarc Zyngier 530591e5becSMarc Zyngier col = dev_event_to_col(desc->its_discard_cmd.dev, 531591e5becSMarc Zyngier desc->its_discard_cmd.event_id); 532591e5becSMarc Zyngier 533cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_DISCARD); 534cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); 535cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_discard_cmd.event_id); 536cc2d3216SMarc Zyngier 537cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 538cc2d3216SMarc Zyngier 53983559b47SMarc Zyngier return valid_col(col); 540cc2d3216SMarc Zyngier } 541cc2d3216SMarc Zyngier 54267047f90SMarc Zyngier static struct its_collection *its_build_inv_cmd(struct its_node *its, 54367047f90SMarc Zyngier struct its_cmd_block *cmd, 544cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 545cc2d3216SMarc Zyngier { 546591e5becSMarc Zyngier struct its_collection *col; 547591e5becSMarc Zyngier 548591e5becSMarc Zyngier col = dev_event_to_col(desc->its_inv_cmd.dev, 549591e5becSMarc Zyngier desc->its_inv_cmd.event_id); 550591e5becSMarc Zyngier 551cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 552cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 553cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 554cc2d3216SMarc Zyngier 555cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 556cc2d3216SMarc Zyngier 55783559b47SMarc Zyngier return valid_col(col); 558cc2d3216SMarc Zyngier } 559cc2d3216SMarc Zyngier 56067047f90SMarc Zyngier static struct its_collection *its_build_int_cmd(struct its_node *its, 56167047f90SMarc Zyngier struct its_cmd_block *cmd, 5628d85dcedSMarc Zyngier struct its_cmd_desc *desc) 5638d85dcedSMarc Zyngier { 5648d85dcedSMarc Zyngier struct its_collection *col; 5658d85dcedSMarc Zyngier 5668d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_int_cmd.dev, 5678d85dcedSMarc Zyngier desc->its_int_cmd.event_id); 5688d85dcedSMarc Zyngier 5698d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 5708d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 5718d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 5728d85dcedSMarc Zyngier 5738d85dcedSMarc Zyngier its_fixup_cmd(cmd); 5748d85dcedSMarc Zyngier 57583559b47SMarc Zyngier return valid_col(col); 5768d85dcedSMarc Zyngier } 5778d85dcedSMarc Zyngier 57867047f90SMarc Zyngier static struct its_collection *its_build_clear_cmd(struct its_node *its, 57967047f90SMarc Zyngier struct its_cmd_block *cmd, 5808d85dcedSMarc Zyngier struct its_cmd_desc *desc) 5818d85dcedSMarc Zyngier { 5828d85dcedSMarc Zyngier struct its_collection *col; 5838d85dcedSMarc Zyngier 5848d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_clear_cmd.dev, 5858d85dcedSMarc Zyngier desc->its_clear_cmd.event_id); 5868d85dcedSMarc Zyngier 5878d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 5888d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 5898d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 5908d85dcedSMarc Zyngier 5918d85dcedSMarc Zyngier its_fixup_cmd(cmd); 5928d85dcedSMarc Zyngier 59383559b47SMarc Zyngier return valid_col(col); 5948d85dcedSMarc Zyngier } 5958d85dcedSMarc Zyngier 59667047f90SMarc Zyngier static struct its_collection *its_build_invall_cmd(struct its_node *its, 59767047f90SMarc Zyngier struct its_cmd_block *cmd, 598cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 599cc2d3216SMarc Zyngier { 600cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INVALL); 601cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 602cc2d3216SMarc Zyngier 603cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 604cc2d3216SMarc Zyngier 605cc2d3216SMarc Zyngier return NULL; 606cc2d3216SMarc Zyngier } 607cc2d3216SMarc Zyngier 60867047f90SMarc Zyngier static struct its_vpe *its_build_vinvall_cmd(struct its_node *its, 60967047f90SMarc Zyngier struct its_cmd_block *cmd, 610eb78192bSMarc Zyngier struct its_cmd_desc *desc) 611eb78192bSMarc Zyngier { 612eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VINVALL); 613eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); 614eb78192bSMarc Zyngier 615eb78192bSMarc Zyngier its_fixup_cmd(cmd); 616eb78192bSMarc Zyngier 617205e065dSMarc Zyngier return valid_vpe(its, desc->its_vinvall_cmd.vpe); 618eb78192bSMarc Zyngier } 619eb78192bSMarc Zyngier 62067047f90SMarc Zyngier static struct its_vpe *its_build_vmapp_cmd(struct its_node *its, 62167047f90SMarc Zyngier struct its_cmd_block *cmd, 622eb78192bSMarc Zyngier struct its_cmd_desc *desc) 623eb78192bSMarc Zyngier { 624eb78192bSMarc Zyngier unsigned long vpt_addr; 6255c9a882eSMarc Zyngier u64 target; 626eb78192bSMarc Zyngier 627eb78192bSMarc Zyngier vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); 6285c9a882eSMarc Zyngier target = desc->its_vmapp_cmd.col->target_address + its->vlpi_redist_offset; 629eb78192bSMarc Zyngier 630eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPP); 631eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); 632eb78192bSMarc Zyngier its_encode_valid(cmd, desc->its_vmapp_cmd.valid); 6335c9a882eSMarc Zyngier its_encode_target(cmd, target); 634eb78192bSMarc Zyngier its_encode_vpt_addr(cmd, vpt_addr); 635eb78192bSMarc Zyngier its_encode_vpt_size(cmd, LPI_NRBITS - 1); 636eb78192bSMarc Zyngier 637eb78192bSMarc Zyngier its_fixup_cmd(cmd); 638eb78192bSMarc Zyngier 639205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmapp_cmd.vpe); 640eb78192bSMarc Zyngier } 641eb78192bSMarc Zyngier 64267047f90SMarc Zyngier static struct its_vpe *its_build_vmapti_cmd(struct its_node *its, 64367047f90SMarc Zyngier struct its_cmd_block *cmd, 644d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 645d011e4e6SMarc Zyngier { 646d011e4e6SMarc Zyngier u32 db; 647d011e4e6SMarc Zyngier 648d011e4e6SMarc Zyngier if (desc->its_vmapti_cmd.db_enabled) 649d011e4e6SMarc Zyngier db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; 650d011e4e6SMarc Zyngier else 651d011e4e6SMarc Zyngier db = 1023; 652d011e4e6SMarc Zyngier 653d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPTI); 654d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); 655d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); 656d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); 657d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 658d011e4e6SMarc Zyngier its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); 659d011e4e6SMarc Zyngier 660d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 661d011e4e6SMarc Zyngier 662205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmapti_cmd.vpe); 663d011e4e6SMarc Zyngier } 664d011e4e6SMarc Zyngier 66567047f90SMarc Zyngier static struct its_vpe *its_build_vmovi_cmd(struct its_node *its, 66667047f90SMarc Zyngier struct its_cmd_block *cmd, 667d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 668d011e4e6SMarc Zyngier { 669d011e4e6SMarc Zyngier u32 db; 670d011e4e6SMarc Zyngier 671d011e4e6SMarc Zyngier if (desc->its_vmovi_cmd.db_enabled) 672d011e4e6SMarc Zyngier db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; 673d011e4e6SMarc Zyngier else 674d011e4e6SMarc Zyngier db = 1023; 675d011e4e6SMarc Zyngier 676d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVI); 677d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); 678d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); 679d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); 680d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 681d011e4e6SMarc Zyngier its_encode_db_valid(cmd, true); 682d011e4e6SMarc Zyngier 683d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 684d011e4e6SMarc Zyngier 685205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmovi_cmd.vpe); 686d011e4e6SMarc Zyngier } 687d011e4e6SMarc Zyngier 68867047f90SMarc Zyngier static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, 68967047f90SMarc Zyngier struct its_cmd_block *cmd, 6903171a47aSMarc Zyngier struct its_cmd_desc *desc) 6913171a47aSMarc Zyngier { 6925c9a882eSMarc Zyngier u64 target; 6935c9a882eSMarc Zyngier 6945c9a882eSMarc Zyngier target = desc->its_vmovp_cmd.col->target_address + its->vlpi_redist_offset; 6953171a47aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVP); 6963171a47aSMarc Zyngier its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); 6973171a47aSMarc Zyngier its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); 6983171a47aSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); 6995c9a882eSMarc Zyngier its_encode_target(cmd, target); 7003171a47aSMarc Zyngier 7013171a47aSMarc Zyngier its_fixup_cmd(cmd); 7023171a47aSMarc Zyngier 703205e065dSMarc Zyngier return valid_vpe(its, desc->its_vmovp_cmd.vpe); 7043171a47aSMarc Zyngier } 7053171a47aSMarc Zyngier 70628614696SMarc Zyngier static struct its_vpe *its_build_vinv_cmd(struct its_node *its, 70728614696SMarc Zyngier struct its_cmd_block *cmd, 70828614696SMarc Zyngier struct its_cmd_desc *desc) 70928614696SMarc Zyngier { 71028614696SMarc Zyngier struct its_vlpi_map *map; 71128614696SMarc Zyngier 71228614696SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_inv_cmd.dev, 71328614696SMarc Zyngier desc->its_inv_cmd.event_id); 71428614696SMarc Zyngier 71528614696SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 71628614696SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 71728614696SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 71828614696SMarc Zyngier 71928614696SMarc Zyngier its_fixup_cmd(cmd); 72028614696SMarc Zyngier 72128614696SMarc Zyngier return valid_vpe(its, map->vpe); 72228614696SMarc Zyngier } 72328614696SMarc Zyngier 724ed0e4aa9SMarc Zyngier static struct its_vpe *its_build_vint_cmd(struct its_node *its, 725ed0e4aa9SMarc Zyngier struct its_cmd_block *cmd, 726ed0e4aa9SMarc Zyngier struct its_cmd_desc *desc) 727ed0e4aa9SMarc Zyngier { 728ed0e4aa9SMarc Zyngier struct its_vlpi_map *map; 729ed0e4aa9SMarc Zyngier 730ed0e4aa9SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_int_cmd.dev, 731ed0e4aa9SMarc Zyngier desc->its_int_cmd.event_id); 732ed0e4aa9SMarc Zyngier 733ed0e4aa9SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 734ed0e4aa9SMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 735ed0e4aa9SMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 736ed0e4aa9SMarc Zyngier 737ed0e4aa9SMarc Zyngier its_fixup_cmd(cmd); 738ed0e4aa9SMarc Zyngier 739ed0e4aa9SMarc Zyngier return valid_vpe(its, map->vpe); 740ed0e4aa9SMarc Zyngier } 741ed0e4aa9SMarc Zyngier 742ed0e4aa9SMarc Zyngier static struct its_vpe *its_build_vclear_cmd(struct its_node *its, 743ed0e4aa9SMarc Zyngier struct its_cmd_block *cmd, 744ed0e4aa9SMarc Zyngier struct its_cmd_desc *desc) 745ed0e4aa9SMarc Zyngier { 746ed0e4aa9SMarc Zyngier struct its_vlpi_map *map; 747ed0e4aa9SMarc Zyngier 748ed0e4aa9SMarc Zyngier map = dev_event_to_vlpi_map(desc->its_clear_cmd.dev, 749ed0e4aa9SMarc Zyngier desc->its_clear_cmd.event_id); 750ed0e4aa9SMarc Zyngier 751ed0e4aa9SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 752ed0e4aa9SMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 753ed0e4aa9SMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 754ed0e4aa9SMarc Zyngier 755ed0e4aa9SMarc Zyngier its_fixup_cmd(cmd); 756ed0e4aa9SMarc Zyngier 757ed0e4aa9SMarc Zyngier return valid_vpe(its, map->vpe); 758ed0e4aa9SMarc Zyngier } 759ed0e4aa9SMarc Zyngier 760cc2d3216SMarc Zyngier static u64 its_cmd_ptr_to_offset(struct its_node *its, 761cc2d3216SMarc Zyngier struct its_cmd_block *ptr) 762cc2d3216SMarc Zyngier { 763cc2d3216SMarc Zyngier return (ptr - its->cmd_base) * sizeof(*ptr); 764cc2d3216SMarc Zyngier } 765cc2d3216SMarc Zyngier 766cc2d3216SMarc Zyngier static int its_queue_full(struct its_node *its) 767cc2d3216SMarc Zyngier { 768cc2d3216SMarc Zyngier int widx; 769cc2d3216SMarc Zyngier int ridx; 770cc2d3216SMarc Zyngier 771cc2d3216SMarc Zyngier widx = its->cmd_write - its->cmd_base; 772cc2d3216SMarc Zyngier ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); 773cc2d3216SMarc Zyngier 774cc2d3216SMarc Zyngier /* This is incredibly unlikely to happen, unless the ITS locks up. */ 775cc2d3216SMarc Zyngier if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) 776cc2d3216SMarc Zyngier return 1; 777cc2d3216SMarc Zyngier 778cc2d3216SMarc Zyngier return 0; 779cc2d3216SMarc Zyngier } 780cc2d3216SMarc Zyngier 781cc2d3216SMarc Zyngier static struct its_cmd_block *its_allocate_entry(struct its_node *its) 782cc2d3216SMarc Zyngier { 783cc2d3216SMarc Zyngier struct its_cmd_block *cmd; 784cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 785cc2d3216SMarc Zyngier 786cc2d3216SMarc Zyngier while (its_queue_full(its)) { 787cc2d3216SMarc Zyngier count--; 788cc2d3216SMarc Zyngier if (!count) { 789cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue not draining\n"); 790cc2d3216SMarc Zyngier return NULL; 791cc2d3216SMarc Zyngier } 792cc2d3216SMarc Zyngier cpu_relax(); 793cc2d3216SMarc Zyngier udelay(1); 794cc2d3216SMarc Zyngier } 795cc2d3216SMarc Zyngier 796cc2d3216SMarc Zyngier cmd = its->cmd_write++; 797cc2d3216SMarc Zyngier 798cc2d3216SMarc Zyngier /* Handle queue wrapping */ 799cc2d3216SMarc Zyngier if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) 800cc2d3216SMarc Zyngier its->cmd_write = its->cmd_base; 801cc2d3216SMarc Zyngier 80234d677a9SMarc Zyngier /* Clear command */ 80334d677a9SMarc Zyngier cmd->raw_cmd[0] = 0; 80434d677a9SMarc Zyngier cmd->raw_cmd[1] = 0; 80534d677a9SMarc Zyngier cmd->raw_cmd[2] = 0; 80634d677a9SMarc Zyngier cmd->raw_cmd[3] = 0; 80734d677a9SMarc Zyngier 808cc2d3216SMarc Zyngier return cmd; 809cc2d3216SMarc Zyngier } 810cc2d3216SMarc Zyngier 811cc2d3216SMarc Zyngier static struct its_cmd_block *its_post_commands(struct its_node *its) 812cc2d3216SMarc Zyngier { 813cc2d3216SMarc Zyngier u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); 814cc2d3216SMarc Zyngier 815cc2d3216SMarc Zyngier writel_relaxed(wr, its->base + GITS_CWRITER); 816cc2d3216SMarc Zyngier 817cc2d3216SMarc Zyngier return its->cmd_write; 818cc2d3216SMarc Zyngier } 819cc2d3216SMarc Zyngier 820cc2d3216SMarc Zyngier static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) 821cc2d3216SMarc Zyngier { 822cc2d3216SMarc Zyngier /* 823cc2d3216SMarc Zyngier * Make sure the commands written to memory are observable by 824cc2d3216SMarc Zyngier * the ITS. 825cc2d3216SMarc Zyngier */ 826cc2d3216SMarc Zyngier if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) 827328191c0SVladimir Murzin gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); 828cc2d3216SMarc Zyngier else 829cc2d3216SMarc Zyngier dsb(ishst); 830cc2d3216SMarc Zyngier } 831cc2d3216SMarc Zyngier 832a19b462fSMarc Zyngier static int its_wait_for_range_completion(struct its_node *its, 833a050fa54SHeyi Guo u64 prev_idx, 834cc2d3216SMarc Zyngier struct its_cmd_block *to) 835cc2d3216SMarc Zyngier { 836a050fa54SHeyi Guo u64 rd_idx, to_idx, linear_idx; 837cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 838cc2d3216SMarc Zyngier 839a050fa54SHeyi Guo /* Linearize to_idx if the command set has wrapped around */ 840cc2d3216SMarc Zyngier to_idx = its_cmd_ptr_to_offset(its, to); 841a050fa54SHeyi Guo if (to_idx < prev_idx) 842a050fa54SHeyi Guo to_idx += ITS_CMD_QUEUE_SZ; 843a050fa54SHeyi Guo 844a050fa54SHeyi Guo linear_idx = prev_idx; 845cc2d3216SMarc Zyngier 846cc2d3216SMarc Zyngier while (1) { 847a050fa54SHeyi Guo s64 delta; 848a050fa54SHeyi Guo 849cc2d3216SMarc Zyngier rd_idx = readl_relaxed(its->base + GITS_CREADR); 8509bdd8b1cSMarc Zyngier 851a050fa54SHeyi Guo /* 852a050fa54SHeyi Guo * Compute the read pointer progress, taking the 853a050fa54SHeyi Guo * potential wrap-around into account. 854a050fa54SHeyi Guo */ 855a050fa54SHeyi Guo delta = rd_idx - prev_idx; 856a050fa54SHeyi Guo if (rd_idx < prev_idx) 857a050fa54SHeyi Guo delta += ITS_CMD_QUEUE_SZ; 8589bdd8b1cSMarc Zyngier 859a050fa54SHeyi Guo linear_idx += delta; 860a050fa54SHeyi Guo if (linear_idx >= to_idx) 861cc2d3216SMarc Zyngier break; 862cc2d3216SMarc Zyngier 863cc2d3216SMarc Zyngier count--; 864cc2d3216SMarc Zyngier if (!count) { 865a050fa54SHeyi Guo pr_err_ratelimited("ITS queue timeout (%llu %llu)\n", 866a050fa54SHeyi Guo to_idx, linear_idx); 867a19b462fSMarc Zyngier return -1; 868cc2d3216SMarc Zyngier } 869a050fa54SHeyi Guo prev_idx = rd_idx; 870cc2d3216SMarc Zyngier cpu_relax(); 871cc2d3216SMarc Zyngier udelay(1); 872cc2d3216SMarc Zyngier } 873a19b462fSMarc Zyngier 874a19b462fSMarc Zyngier return 0; 875cc2d3216SMarc Zyngier } 876cc2d3216SMarc Zyngier 877e4f9094bSMarc Zyngier /* Warning, macro hell follows */ 878e4f9094bSMarc Zyngier #define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ 879e4f9094bSMarc Zyngier void name(struct its_node *its, \ 880e4f9094bSMarc Zyngier buildtype builder, \ 881e4f9094bSMarc Zyngier struct its_cmd_desc *desc) \ 882e4f9094bSMarc Zyngier { \ 883e4f9094bSMarc Zyngier struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ 884e4f9094bSMarc Zyngier synctype *sync_obj; \ 885e4f9094bSMarc Zyngier unsigned long flags; \ 886a050fa54SHeyi Guo u64 rd_idx; \ 887e4f9094bSMarc Zyngier \ 888e4f9094bSMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); \ 889e4f9094bSMarc Zyngier \ 890e4f9094bSMarc Zyngier cmd = its_allocate_entry(its); \ 891e4f9094bSMarc Zyngier if (!cmd) { /* We're soooooo screewed... */ \ 892e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 893e4f9094bSMarc Zyngier return; \ 894e4f9094bSMarc Zyngier } \ 89567047f90SMarc Zyngier sync_obj = builder(its, cmd, desc); \ 896e4f9094bSMarc Zyngier its_flush_cmd(its, cmd); \ 897e4f9094bSMarc Zyngier \ 898e4f9094bSMarc Zyngier if (sync_obj) { \ 899e4f9094bSMarc Zyngier sync_cmd = its_allocate_entry(its); \ 900e4f9094bSMarc Zyngier if (!sync_cmd) \ 901e4f9094bSMarc Zyngier goto post; \ 902e4f9094bSMarc Zyngier \ 90367047f90SMarc Zyngier buildfn(its, sync_cmd, sync_obj); \ 904e4f9094bSMarc Zyngier its_flush_cmd(its, sync_cmd); \ 905e4f9094bSMarc Zyngier } \ 906e4f9094bSMarc Zyngier \ 907e4f9094bSMarc Zyngier post: \ 908a050fa54SHeyi Guo rd_idx = readl_relaxed(its->base + GITS_CREADR); \ 909e4f9094bSMarc Zyngier next_cmd = its_post_commands(its); \ 910e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 911e4f9094bSMarc Zyngier \ 912a050fa54SHeyi Guo if (its_wait_for_range_completion(its, rd_idx, next_cmd)) \ 913a19b462fSMarc Zyngier pr_err_ratelimited("ITS cmd %ps failed\n", builder); \ 914e4f9094bSMarc Zyngier } 915e4f9094bSMarc Zyngier 91667047f90SMarc Zyngier static void its_build_sync_cmd(struct its_node *its, 91767047f90SMarc Zyngier struct its_cmd_block *sync_cmd, 918e4f9094bSMarc Zyngier struct its_collection *sync_col) 919cc2d3216SMarc Zyngier { 920cc2d3216SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_SYNC); 921cc2d3216SMarc Zyngier its_encode_target(sync_cmd, sync_col->target_address); 922e4f9094bSMarc Zyngier 923cc2d3216SMarc Zyngier its_fixup_cmd(sync_cmd); 924cc2d3216SMarc Zyngier } 925cc2d3216SMarc Zyngier 926e4f9094bSMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, 927e4f9094bSMarc Zyngier struct its_collection, its_build_sync_cmd) 928cc2d3216SMarc Zyngier 92967047f90SMarc Zyngier static void its_build_vsync_cmd(struct its_node *its, 93067047f90SMarc Zyngier struct its_cmd_block *sync_cmd, 931d011e4e6SMarc Zyngier struct its_vpe *sync_vpe) 932d011e4e6SMarc Zyngier { 933d011e4e6SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); 934d011e4e6SMarc Zyngier its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); 935d011e4e6SMarc Zyngier 936d011e4e6SMarc Zyngier its_fixup_cmd(sync_cmd); 937d011e4e6SMarc Zyngier } 938d011e4e6SMarc Zyngier 939d011e4e6SMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, 940d011e4e6SMarc Zyngier struct its_vpe, its_build_vsync_cmd) 941d011e4e6SMarc Zyngier 9428d85dcedSMarc Zyngier static void its_send_int(struct its_device *dev, u32 event_id) 9438d85dcedSMarc Zyngier { 9448d85dcedSMarc Zyngier struct its_cmd_desc desc; 9458d85dcedSMarc Zyngier 9468d85dcedSMarc Zyngier desc.its_int_cmd.dev = dev; 9478d85dcedSMarc Zyngier desc.its_int_cmd.event_id = event_id; 9488d85dcedSMarc Zyngier 9498d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_int_cmd, &desc); 9508d85dcedSMarc Zyngier } 9518d85dcedSMarc Zyngier 9528d85dcedSMarc Zyngier static void its_send_clear(struct its_device *dev, u32 event_id) 9538d85dcedSMarc Zyngier { 9548d85dcedSMarc Zyngier struct its_cmd_desc desc; 9558d85dcedSMarc Zyngier 9568d85dcedSMarc Zyngier desc.its_clear_cmd.dev = dev; 9578d85dcedSMarc Zyngier desc.its_clear_cmd.event_id = event_id; 9588d85dcedSMarc Zyngier 9598d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_clear_cmd, &desc); 960cc2d3216SMarc Zyngier } 961cc2d3216SMarc Zyngier 962cc2d3216SMarc Zyngier static void its_send_inv(struct its_device *dev, u32 event_id) 963cc2d3216SMarc Zyngier { 964cc2d3216SMarc Zyngier struct its_cmd_desc desc; 965cc2d3216SMarc Zyngier 966cc2d3216SMarc Zyngier desc.its_inv_cmd.dev = dev; 967cc2d3216SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 968cc2d3216SMarc Zyngier 969cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_inv_cmd, &desc); 970cc2d3216SMarc Zyngier } 971cc2d3216SMarc Zyngier 972cc2d3216SMarc Zyngier static void its_send_mapd(struct its_device *dev, int valid) 973cc2d3216SMarc Zyngier { 974cc2d3216SMarc Zyngier struct its_cmd_desc desc; 975cc2d3216SMarc Zyngier 976cc2d3216SMarc Zyngier desc.its_mapd_cmd.dev = dev; 977cc2d3216SMarc Zyngier desc.its_mapd_cmd.valid = !!valid; 978cc2d3216SMarc Zyngier 979cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_mapd_cmd, &desc); 980cc2d3216SMarc Zyngier } 981cc2d3216SMarc Zyngier 982cc2d3216SMarc Zyngier static void its_send_mapc(struct its_node *its, struct its_collection *col, 983cc2d3216SMarc Zyngier int valid) 984cc2d3216SMarc Zyngier { 985cc2d3216SMarc Zyngier struct its_cmd_desc desc; 986cc2d3216SMarc Zyngier 987cc2d3216SMarc Zyngier desc.its_mapc_cmd.col = col; 988cc2d3216SMarc Zyngier desc.its_mapc_cmd.valid = !!valid; 989cc2d3216SMarc Zyngier 990cc2d3216SMarc Zyngier its_send_single_command(its, its_build_mapc_cmd, &desc); 991cc2d3216SMarc Zyngier } 992cc2d3216SMarc Zyngier 9936a25ad3aSMarc Zyngier static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) 994cc2d3216SMarc Zyngier { 995cc2d3216SMarc Zyngier struct its_cmd_desc desc; 996cc2d3216SMarc Zyngier 9976a25ad3aSMarc Zyngier desc.its_mapti_cmd.dev = dev; 9986a25ad3aSMarc Zyngier desc.its_mapti_cmd.phys_id = irq_id; 9996a25ad3aSMarc Zyngier desc.its_mapti_cmd.event_id = id; 1000cc2d3216SMarc Zyngier 10016a25ad3aSMarc Zyngier its_send_single_command(dev->its, its_build_mapti_cmd, &desc); 1002cc2d3216SMarc Zyngier } 1003cc2d3216SMarc Zyngier 1004cc2d3216SMarc Zyngier static void its_send_movi(struct its_device *dev, 1005cc2d3216SMarc Zyngier struct its_collection *col, u32 id) 1006cc2d3216SMarc Zyngier { 1007cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1008cc2d3216SMarc Zyngier 1009cc2d3216SMarc Zyngier desc.its_movi_cmd.dev = dev; 1010cc2d3216SMarc Zyngier desc.its_movi_cmd.col = col; 1011591e5becSMarc Zyngier desc.its_movi_cmd.event_id = id; 1012cc2d3216SMarc Zyngier 1013cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_movi_cmd, &desc); 1014cc2d3216SMarc Zyngier } 1015cc2d3216SMarc Zyngier 1016cc2d3216SMarc Zyngier static void its_send_discard(struct its_device *dev, u32 id) 1017cc2d3216SMarc Zyngier { 1018cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1019cc2d3216SMarc Zyngier 1020cc2d3216SMarc Zyngier desc.its_discard_cmd.dev = dev; 1021cc2d3216SMarc Zyngier desc.its_discard_cmd.event_id = id; 1022cc2d3216SMarc Zyngier 1023cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_discard_cmd, &desc); 1024cc2d3216SMarc Zyngier } 1025cc2d3216SMarc Zyngier 1026cc2d3216SMarc Zyngier static void its_send_invall(struct its_node *its, struct its_collection *col) 1027cc2d3216SMarc Zyngier { 1028cc2d3216SMarc Zyngier struct its_cmd_desc desc; 1029cc2d3216SMarc Zyngier 1030cc2d3216SMarc Zyngier desc.its_invall_cmd.col = col; 1031cc2d3216SMarc Zyngier 1032cc2d3216SMarc Zyngier its_send_single_command(its, its_build_invall_cmd, &desc); 1033cc2d3216SMarc Zyngier } 1034c48ed51cSMarc Zyngier 1035d011e4e6SMarc Zyngier static void its_send_vmapti(struct its_device *dev, u32 id) 1036d011e4e6SMarc Zyngier { 1037c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); 1038d011e4e6SMarc Zyngier struct its_cmd_desc desc; 1039d011e4e6SMarc Zyngier 1040d011e4e6SMarc Zyngier desc.its_vmapti_cmd.vpe = map->vpe; 1041d011e4e6SMarc Zyngier desc.its_vmapti_cmd.dev = dev; 1042d011e4e6SMarc Zyngier desc.its_vmapti_cmd.virt_id = map->vintid; 1043d011e4e6SMarc Zyngier desc.its_vmapti_cmd.event_id = id; 1044d011e4e6SMarc Zyngier desc.its_vmapti_cmd.db_enabled = map->db_enabled; 1045d011e4e6SMarc Zyngier 1046d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); 1047d011e4e6SMarc Zyngier } 1048d011e4e6SMarc Zyngier 1049d011e4e6SMarc Zyngier static void its_send_vmovi(struct its_device *dev, u32 id) 1050d011e4e6SMarc Zyngier { 1051c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = dev_event_to_vlpi_map(dev, id); 1052d011e4e6SMarc Zyngier struct its_cmd_desc desc; 1053d011e4e6SMarc Zyngier 1054d011e4e6SMarc Zyngier desc.its_vmovi_cmd.vpe = map->vpe; 1055d011e4e6SMarc Zyngier desc.its_vmovi_cmd.dev = dev; 1056d011e4e6SMarc Zyngier desc.its_vmovi_cmd.event_id = id; 1057d011e4e6SMarc Zyngier desc.its_vmovi_cmd.db_enabled = map->db_enabled; 1058d011e4e6SMarc Zyngier 1059d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); 1060d011e4e6SMarc Zyngier } 1061d011e4e6SMarc Zyngier 106275fd951bSMarc Zyngier static void its_send_vmapp(struct its_node *its, 106375fd951bSMarc Zyngier struct its_vpe *vpe, bool valid) 1064eb78192bSMarc Zyngier { 1065eb78192bSMarc Zyngier struct its_cmd_desc desc; 1066eb78192bSMarc Zyngier 1067eb78192bSMarc Zyngier desc.its_vmapp_cmd.vpe = vpe; 1068eb78192bSMarc Zyngier desc.its_vmapp_cmd.valid = valid; 1069eb78192bSMarc Zyngier desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; 107075fd951bSMarc Zyngier 1071eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); 1072eb78192bSMarc Zyngier } 1073eb78192bSMarc Zyngier 10743171a47aSMarc Zyngier static void its_send_vmovp(struct its_vpe *vpe) 10753171a47aSMarc Zyngier { 107684243125SZenghui Yu struct its_cmd_desc desc = {}; 10773171a47aSMarc Zyngier struct its_node *its; 10783171a47aSMarc Zyngier unsigned long flags; 10793171a47aSMarc Zyngier int col_id = vpe->col_idx; 10803171a47aSMarc Zyngier 10813171a47aSMarc Zyngier desc.its_vmovp_cmd.vpe = vpe; 10823171a47aSMarc Zyngier 10833171a47aSMarc Zyngier if (!its_list_map) { 10843171a47aSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 10853171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 10863171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 10873171a47aSMarc Zyngier return; 10883171a47aSMarc Zyngier } 10893171a47aSMarc Zyngier 10903171a47aSMarc Zyngier /* 10913171a47aSMarc Zyngier * Yet another marvel of the architecture. If using the 10923171a47aSMarc Zyngier * its_list "feature", we need to make sure that all ITSs 10933171a47aSMarc Zyngier * receive all VMOVP commands in the same order. The only way 10943171a47aSMarc Zyngier * to guarantee this is to make vmovp a serialization point. 10953171a47aSMarc Zyngier * 10963171a47aSMarc Zyngier * Wall <-- Head. 10973171a47aSMarc Zyngier */ 10983171a47aSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 10993171a47aSMarc Zyngier 11003171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; 110184243125SZenghui Yu desc.its_vmovp_cmd.its_list = get_its_list(vpe->its_vm); 11023171a47aSMarc Zyngier 11033171a47aSMarc Zyngier /* Emit VMOVPs */ 11043171a47aSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 11050dd57fedSMarc Zyngier if (!is_v4(its)) 11063171a47aSMarc Zyngier continue; 11073171a47aSMarc Zyngier 11082247e1bfSMarc Zyngier if (!vpe->its_vm->vlpi_count[its->list_nr]) 11092247e1bfSMarc Zyngier continue; 11102247e1bfSMarc Zyngier 11113171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 11123171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 11133171a47aSMarc Zyngier } 11143171a47aSMarc Zyngier 11153171a47aSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 11163171a47aSMarc Zyngier } 11173171a47aSMarc Zyngier 111840619a2eSMarc Zyngier static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe) 1119eb78192bSMarc Zyngier { 1120eb78192bSMarc Zyngier struct its_cmd_desc desc; 1121eb78192bSMarc Zyngier 1122eb78192bSMarc Zyngier desc.its_vinvall_cmd.vpe = vpe; 1123eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); 1124eb78192bSMarc Zyngier } 1125eb78192bSMarc Zyngier 112628614696SMarc Zyngier static void its_send_vinv(struct its_device *dev, u32 event_id) 112728614696SMarc Zyngier { 112828614696SMarc Zyngier struct its_cmd_desc desc; 112928614696SMarc Zyngier 113028614696SMarc Zyngier /* 113128614696SMarc Zyngier * There is no real VINV command. This is just a normal INV, 113228614696SMarc Zyngier * with a VSYNC instead of a SYNC. 113328614696SMarc Zyngier */ 113428614696SMarc Zyngier desc.its_inv_cmd.dev = dev; 113528614696SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 113628614696SMarc Zyngier 113728614696SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vinv_cmd, &desc); 113828614696SMarc Zyngier } 113928614696SMarc Zyngier 1140ed0e4aa9SMarc Zyngier static void its_send_vint(struct its_device *dev, u32 event_id) 1141ed0e4aa9SMarc Zyngier { 1142ed0e4aa9SMarc Zyngier struct its_cmd_desc desc; 1143ed0e4aa9SMarc Zyngier 1144ed0e4aa9SMarc Zyngier /* 1145ed0e4aa9SMarc Zyngier * There is no real VINT command. This is just a normal INT, 1146ed0e4aa9SMarc Zyngier * with a VSYNC instead of a SYNC. 1147ed0e4aa9SMarc Zyngier */ 1148ed0e4aa9SMarc Zyngier desc.its_int_cmd.dev = dev; 1149ed0e4aa9SMarc Zyngier desc.its_int_cmd.event_id = event_id; 1150ed0e4aa9SMarc Zyngier 1151ed0e4aa9SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vint_cmd, &desc); 1152ed0e4aa9SMarc Zyngier } 1153ed0e4aa9SMarc Zyngier 1154ed0e4aa9SMarc Zyngier static void its_send_vclear(struct its_device *dev, u32 event_id) 1155ed0e4aa9SMarc Zyngier { 1156ed0e4aa9SMarc Zyngier struct its_cmd_desc desc; 1157ed0e4aa9SMarc Zyngier 1158ed0e4aa9SMarc Zyngier /* 1159ed0e4aa9SMarc Zyngier * There is no real VCLEAR command. This is just a normal CLEAR, 1160ed0e4aa9SMarc Zyngier * with a VSYNC instead of a SYNC. 1161ed0e4aa9SMarc Zyngier */ 1162ed0e4aa9SMarc Zyngier desc.its_clear_cmd.dev = dev; 1163ed0e4aa9SMarc Zyngier desc.its_clear_cmd.event_id = event_id; 1164ed0e4aa9SMarc Zyngier 1165ed0e4aa9SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vclear_cmd, &desc); 1166ed0e4aa9SMarc Zyngier } 1167ed0e4aa9SMarc Zyngier 1168c48ed51cSMarc Zyngier /* 1169c48ed51cSMarc Zyngier * irqchip functions - assumes MSI, mostly. 1170c48ed51cSMarc Zyngier */ 1171c1d4d5cdSMarc Zyngier static struct its_vlpi_map *get_vlpi_map(struct irq_data *d) 1172c1d4d5cdSMarc Zyngier { 1173c1d4d5cdSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1174c1d4d5cdSMarc Zyngier u32 event = its_get_event_id(d); 1175c1d4d5cdSMarc Zyngier 1176c1d4d5cdSMarc Zyngier if (!irqd_is_forwarded_to_vcpu(d)) 1177c1d4d5cdSMarc Zyngier return NULL; 1178c1d4d5cdSMarc Zyngier 1179c1d4d5cdSMarc Zyngier return dev_event_to_vlpi_map(its_dev, event); 1180c1d4d5cdSMarc Zyngier } 1181c48ed51cSMarc Zyngier 1182015ec038SMarc Zyngier static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) 1183c48ed51cSMarc Zyngier { 1184c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 1185015ec038SMarc Zyngier irq_hw_number_t hwirq; 1186e1a2e201SMarc Zyngier void *va; 1187adcdb94eSMarc Zyngier u8 *cfg; 1188c48ed51cSMarc Zyngier 1189c1d4d5cdSMarc Zyngier if (map) { 1190c1d4d5cdSMarc Zyngier va = page_address(map->vm->vprop_page); 1191d4d7b4adSMarc Zyngier hwirq = map->vintid; 1192d4d7b4adSMarc Zyngier 1193d4d7b4adSMarc Zyngier /* Remember the updated property */ 1194d4d7b4adSMarc Zyngier map->properties &= ~clr; 1195d4d7b4adSMarc Zyngier map->properties |= set | LPI_PROP_GROUP1; 1196015ec038SMarc Zyngier } else { 1197e1a2e201SMarc Zyngier va = gic_rdists->prop_table_va; 1198015ec038SMarc Zyngier hwirq = d->hwirq; 1199015ec038SMarc Zyngier } 1200adcdb94eSMarc Zyngier 1201e1a2e201SMarc Zyngier cfg = va + hwirq - 8192; 1202adcdb94eSMarc Zyngier *cfg &= ~clr; 1203015ec038SMarc Zyngier *cfg |= set | LPI_PROP_GROUP1; 1204c48ed51cSMarc Zyngier 1205c48ed51cSMarc Zyngier /* 1206c48ed51cSMarc Zyngier * Make the above write visible to the redistributors. 1207c48ed51cSMarc Zyngier * And yes, we're flushing exactly: One. Single. Byte. 1208c48ed51cSMarc Zyngier * Humpf... 1209c48ed51cSMarc Zyngier */ 1210c48ed51cSMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) 1211328191c0SVladimir Murzin gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); 1212c48ed51cSMarc Zyngier else 1213c48ed51cSMarc Zyngier dsb(ishst); 1214015ec038SMarc Zyngier } 1215015ec038SMarc Zyngier 12162f4f064bSMarc Zyngier static void wait_for_syncr(void __iomem *rdbase) 12172f4f064bSMarc Zyngier { 12182f4f064bSMarc Zyngier while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) 12192f4f064bSMarc Zyngier cpu_relax(); 12202f4f064bSMarc Zyngier } 12212f4f064bSMarc Zyngier 1222425c09beSMarc Zyngier static void direct_lpi_inv(struct irq_data *d) 1223425c09beSMarc Zyngier { 1224425c09beSMarc Zyngier struct its_collection *col; 1225425c09beSMarc Zyngier void __iomem *rdbase; 1226425c09beSMarc Zyngier 1227425c09beSMarc Zyngier /* Target the redistributor this LPI is currently routed to */ 1228425c09beSMarc Zyngier col = irq_to_col(d); 1229425c09beSMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, col->col_id)->rd_base; 1230425c09beSMarc Zyngier gic_write_lpir(d->hwirq, rdbase + GICR_INVLPIR); 1231425c09beSMarc Zyngier 1232425c09beSMarc Zyngier wait_for_syncr(rdbase); 1233425c09beSMarc Zyngier } 1234425c09beSMarc Zyngier 1235015ec038SMarc Zyngier static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) 1236015ec038SMarc Zyngier { 1237015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1238015ec038SMarc Zyngier 1239015ec038SMarc Zyngier lpi_write_config(d, clr, set); 1240425c09beSMarc Zyngier if (gic_rdists->has_direct_lpi && !irqd_is_forwarded_to_vcpu(d)) 1241425c09beSMarc Zyngier direct_lpi_inv(d); 124228614696SMarc Zyngier else if (!irqd_is_forwarded_to_vcpu(d)) 1243adcdb94eSMarc Zyngier its_send_inv(its_dev, its_get_event_id(d)); 124428614696SMarc Zyngier else 124528614696SMarc Zyngier its_send_vinv(its_dev, its_get_event_id(d)); 1246c48ed51cSMarc Zyngier } 1247c48ed51cSMarc Zyngier 1248015ec038SMarc Zyngier static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) 1249015ec038SMarc Zyngier { 1250015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1251015ec038SMarc Zyngier u32 event = its_get_event_id(d); 1252c1d4d5cdSMarc Zyngier struct its_vlpi_map *map; 1253015ec038SMarc Zyngier 1254c1d4d5cdSMarc Zyngier map = dev_event_to_vlpi_map(its_dev, event); 1255c1d4d5cdSMarc Zyngier 1256c1d4d5cdSMarc Zyngier if (map->db_enabled == enable) 1257015ec038SMarc Zyngier return; 1258015ec038SMarc Zyngier 1259c1d4d5cdSMarc Zyngier map->db_enabled = enable; 1260015ec038SMarc Zyngier 1261015ec038SMarc Zyngier /* 1262015ec038SMarc Zyngier * More fun with the architecture: 1263015ec038SMarc Zyngier * 1264015ec038SMarc Zyngier * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI 1265015ec038SMarc Zyngier * value or to 1023, depending on the enable bit. But that 1266015ec038SMarc Zyngier * would be issueing a mapping for an /existing/ DevID+EventID 1267015ec038SMarc Zyngier * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI 1268015ec038SMarc Zyngier * to the /same/ vPE, using this opportunity to adjust the 1269015ec038SMarc Zyngier * doorbell. Mouahahahaha. We loves it, Precious. 1270015ec038SMarc Zyngier */ 1271015ec038SMarc Zyngier its_send_vmovi(its_dev, event); 1272c48ed51cSMarc Zyngier } 1273c48ed51cSMarc Zyngier 1274c48ed51cSMarc Zyngier static void its_mask_irq(struct irq_data *d) 1275c48ed51cSMarc Zyngier { 1276015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1277015ec038SMarc Zyngier its_vlpi_set_doorbell(d, false); 1278015ec038SMarc Zyngier 1279adcdb94eSMarc Zyngier lpi_update_config(d, LPI_PROP_ENABLED, 0); 1280c48ed51cSMarc Zyngier } 1281c48ed51cSMarc Zyngier 1282c48ed51cSMarc Zyngier static void its_unmask_irq(struct irq_data *d) 1283c48ed51cSMarc Zyngier { 1284015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1285015ec038SMarc Zyngier its_vlpi_set_doorbell(d, true); 1286015ec038SMarc Zyngier 1287adcdb94eSMarc Zyngier lpi_update_config(d, 0, LPI_PROP_ENABLED); 1288c48ed51cSMarc Zyngier } 1289c48ed51cSMarc Zyngier 1290c48ed51cSMarc Zyngier static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, 1291c48ed51cSMarc Zyngier bool force) 1292c48ed51cSMarc Zyngier { 1293fbf8f40eSGanapatrao Kulkarni unsigned int cpu; 1294fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 1295c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1296c48ed51cSMarc Zyngier struct its_collection *target_col; 1297c48ed51cSMarc Zyngier u32 id = its_get_event_id(d); 1298c48ed51cSMarc Zyngier 1299015ec038SMarc Zyngier /* A forwarded interrupt should use irq_set_vcpu_affinity */ 1300015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1301015ec038SMarc Zyngier return -EINVAL; 1302015ec038SMarc Zyngier 1303fbf8f40eSGanapatrao Kulkarni /* lpi cannot be routed to a redistributor that is on a foreign node */ 1304fbf8f40eSGanapatrao Kulkarni if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 1305fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) { 1306fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 1307fbf8f40eSGanapatrao Kulkarni if (!cpumask_intersects(mask_val, cpu_mask)) 1308fbf8f40eSGanapatrao Kulkarni return -EINVAL; 1309fbf8f40eSGanapatrao Kulkarni } 1310fbf8f40eSGanapatrao Kulkarni } 1311fbf8f40eSGanapatrao Kulkarni 1312fbf8f40eSGanapatrao Kulkarni cpu = cpumask_any_and(mask_val, cpu_mask); 1313fbf8f40eSGanapatrao Kulkarni 1314c48ed51cSMarc Zyngier if (cpu >= nr_cpu_ids) 1315c48ed51cSMarc Zyngier return -EINVAL; 1316c48ed51cSMarc Zyngier 13178b8d94a7SMaJun /* don't set the affinity when the target cpu is same as current one */ 13188b8d94a7SMaJun if (cpu != its_dev->event_map.col_map[id]) { 1319c48ed51cSMarc Zyngier target_col = &its_dev->its->collections[cpu]; 1320c48ed51cSMarc Zyngier its_send_movi(its_dev, target_col, id); 1321591e5becSMarc Zyngier its_dev->event_map.col_map[id] = cpu; 13220d224d35SMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 13238b8d94a7SMaJun } 1324c48ed51cSMarc Zyngier 1325c48ed51cSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 1326c48ed51cSMarc Zyngier } 1327c48ed51cSMarc Zyngier 1328558b0165SArd Biesheuvel static u64 its_irq_get_msi_base(struct its_device *its_dev) 1329558b0165SArd Biesheuvel { 1330558b0165SArd Biesheuvel struct its_node *its = its_dev->its; 1331558b0165SArd Biesheuvel 1332558b0165SArd Biesheuvel return its->phys_base + GITS_TRANSLATER; 1333558b0165SArd Biesheuvel } 1334558b0165SArd Biesheuvel 1335b48ac83dSMarc Zyngier static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) 1336b48ac83dSMarc Zyngier { 1337b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1338b48ac83dSMarc Zyngier struct its_node *its; 1339b48ac83dSMarc Zyngier u64 addr; 1340b48ac83dSMarc Zyngier 1341b48ac83dSMarc Zyngier its = its_dev->its; 1342558b0165SArd Biesheuvel addr = its->get_msi_base(its_dev); 1343b48ac83dSMarc Zyngier 1344b11283ebSVladimir Murzin msg->address_lo = lower_32_bits(addr); 1345b11283ebSVladimir Murzin msg->address_hi = upper_32_bits(addr); 1346b48ac83dSMarc Zyngier msg->data = its_get_event_id(d); 134744bb7e24SRobin Murphy 134835ae7df2SJulien Grall iommu_dma_compose_msi_msg(irq_data_get_msi_desc(d), msg); 1349b48ac83dSMarc Zyngier } 1350b48ac83dSMarc Zyngier 13518d85dcedSMarc Zyngier static int its_irq_set_irqchip_state(struct irq_data *d, 13528d85dcedSMarc Zyngier enum irqchip_irq_state which, 13538d85dcedSMarc Zyngier bool state) 13548d85dcedSMarc Zyngier { 13558d85dcedSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 13568d85dcedSMarc Zyngier u32 event = its_get_event_id(d); 13578d85dcedSMarc Zyngier 13588d85dcedSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 13598d85dcedSMarc Zyngier return -EINVAL; 13608d85dcedSMarc Zyngier 1361ed0e4aa9SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1362ed0e4aa9SMarc Zyngier if (state) 1363ed0e4aa9SMarc Zyngier its_send_vint(its_dev, event); 1364ed0e4aa9SMarc Zyngier else 1365ed0e4aa9SMarc Zyngier its_send_vclear(its_dev, event); 1366ed0e4aa9SMarc Zyngier } else { 13678d85dcedSMarc Zyngier if (state) 13688d85dcedSMarc Zyngier its_send_int(its_dev, event); 13698d85dcedSMarc Zyngier else 13708d85dcedSMarc Zyngier its_send_clear(its_dev, event); 1371ed0e4aa9SMarc Zyngier } 13728d85dcedSMarc Zyngier 13738d85dcedSMarc Zyngier return 0; 13748d85dcedSMarc Zyngier } 13758d85dcedSMarc Zyngier 13762247e1bfSMarc Zyngier static void its_map_vm(struct its_node *its, struct its_vm *vm) 13772247e1bfSMarc Zyngier { 13782247e1bfSMarc Zyngier unsigned long flags; 13792247e1bfSMarc Zyngier 13802247e1bfSMarc Zyngier /* Not using the ITS list? Everything is always mapped. */ 13812247e1bfSMarc Zyngier if (!its_list_map) 13822247e1bfSMarc Zyngier return; 13832247e1bfSMarc Zyngier 13842247e1bfSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 13852247e1bfSMarc Zyngier 13862247e1bfSMarc Zyngier /* 13872247e1bfSMarc Zyngier * If the VM wasn't mapped yet, iterate over the vpes and get 13882247e1bfSMarc Zyngier * them mapped now. 13892247e1bfSMarc Zyngier */ 13902247e1bfSMarc Zyngier vm->vlpi_count[its->list_nr]++; 13912247e1bfSMarc Zyngier 13922247e1bfSMarc Zyngier if (vm->vlpi_count[its->list_nr] == 1) { 13932247e1bfSMarc Zyngier int i; 13942247e1bfSMarc Zyngier 13952247e1bfSMarc Zyngier for (i = 0; i < vm->nr_vpes; i++) { 13962247e1bfSMarc Zyngier struct its_vpe *vpe = vm->vpes[i]; 139744c4c25eSMarc Zyngier struct irq_data *d = irq_get_irq_data(vpe->irq); 13982247e1bfSMarc Zyngier 13992247e1bfSMarc Zyngier /* Map the VPE to the first possible CPU */ 14002247e1bfSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 14012247e1bfSMarc Zyngier its_send_vmapp(its, vpe, true); 14022247e1bfSMarc Zyngier its_send_vinvall(its, vpe); 140344c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); 14042247e1bfSMarc Zyngier } 14052247e1bfSMarc Zyngier } 14062247e1bfSMarc Zyngier 14072247e1bfSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 14082247e1bfSMarc Zyngier } 14092247e1bfSMarc Zyngier 14102247e1bfSMarc Zyngier static void its_unmap_vm(struct its_node *its, struct its_vm *vm) 14112247e1bfSMarc Zyngier { 14122247e1bfSMarc Zyngier unsigned long flags; 14132247e1bfSMarc Zyngier 14142247e1bfSMarc Zyngier /* Not using the ITS list? Everything is always mapped. */ 14152247e1bfSMarc Zyngier if (!its_list_map) 14162247e1bfSMarc Zyngier return; 14172247e1bfSMarc Zyngier 14182247e1bfSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 14192247e1bfSMarc Zyngier 14202247e1bfSMarc Zyngier if (!--vm->vlpi_count[its->list_nr]) { 14212247e1bfSMarc Zyngier int i; 14222247e1bfSMarc Zyngier 14232247e1bfSMarc Zyngier for (i = 0; i < vm->nr_vpes; i++) 14242247e1bfSMarc Zyngier its_send_vmapp(its, vm->vpes[i], false); 14252247e1bfSMarc Zyngier } 14262247e1bfSMarc Zyngier 14272247e1bfSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 14282247e1bfSMarc Zyngier } 14292247e1bfSMarc Zyngier 1430d011e4e6SMarc Zyngier static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) 1431d011e4e6SMarc Zyngier { 1432d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1433d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1434d011e4e6SMarc Zyngier int ret = 0; 1435d011e4e6SMarc Zyngier 1436d011e4e6SMarc Zyngier if (!info->map) 1437d011e4e6SMarc Zyngier return -EINVAL; 1438d011e4e6SMarc Zyngier 1439d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1440d011e4e6SMarc Zyngier 1441d011e4e6SMarc Zyngier if (!its_dev->event_map.vm) { 1442d011e4e6SMarc Zyngier struct its_vlpi_map *maps; 1443d011e4e6SMarc Zyngier 14446396bb22SKees Cook maps = kcalloc(its_dev->event_map.nr_lpis, sizeof(*maps), 1445d011e4e6SMarc Zyngier GFP_KERNEL); 1446d011e4e6SMarc Zyngier if (!maps) { 1447d011e4e6SMarc Zyngier ret = -ENOMEM; 1448d011e4e6SMarc Zyngier goto out; 1449d011e4e6SMarc Zyngier } 1450d011e4e6SMarc Zyngier 1451d011e4e6SMarc Zyngier its_dev->event_map.vm = info->map->vm; 1452d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps = maps; 1453d011e4e6SMarc Zyngier } else if (its_dev->event_map.vm != info->map->vm) { 1454d011e4e6SMarc Zyngier ret = -EINVAL; 1455d011e4e6SMarc Zyngier goto out; 1456d011e4e6SMarc Zyngier } 1457d011e4e6SMarc Zyngier 1458d011e4e6SMarc Zyngier /* Get our private copy of the mapping information */ 1459d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps[event] = *info->map; 1460d011e4e6SMarc Zyngier 1461d011e4e6SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1462d011e4e6SMarc Zyngier /* Already mapped, move it around */ 1463d011e4e6SMarc Zyngier its_send_vmovi(its_dev, event); 1464d011e4e6SMarc Zyngier } else { 14652247e1bfSMarc Zyngier /* Ensure all the VPEs are mapped on this ITS */ 14662247e1bfSMarc Zyngier its_map_vm(its_dev->its, info->map->vm); 14672247e1bfSMarc Zyngier 1468d4d7b4adSMarc Zyngier /* 1469d4d7b4adSMarc Zyngier * Flag the interrupt as forwarded so that we can 1470d4d7b4adSMarc Zyngier * start poking the virtual property table. 1471d4d7b4adSMarc Zyngier */ 1472d4d7b4adSMarc Zyngier irqd_set_forwarded_to_vcpu(d); 1473d4d7b4adSMarc Zyngier 1474d4d7b4adSMarc Zyngier /* Write out the property to the prop table */ 1475d4d7b4adSMarc Zyngier lpi_write_config(d, 0xff, info->map->properties); 1476d4d7b4adSMarc Zyngier 1477d011e4e6SMarc Zyngier /* Drop the physical mapping */ 1478d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1479d011e4e6SMarc Zyngier 1480d011e4e6SMarc Zyngier /* and install the virtual one */ 1481d011e4e6SMarc Zyngier its_send_vmapti(its_dev, event); 1482d011e4e6SMarc Zyngier 1483d011e4e6SMarc Zyngier /* Increment the number of VLPIs */ 1484d011e4e6SMarc Zyngier its_dev->event_map.nr_vlpis++; 1485d011e4e6SMarc Zyngier } 1486d011e4e6SMarc Zyngier 1487d011e4e6SMarc Zyngier out: 1488d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1489d011e4e6SMarc Zyngier return ret; 1490d011e4e6SMarc Zyngier } 1491d011e4e6SMarc Zyngier 1492d011e4e6SMarc Zyngier static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) 1493d011e4e6SMarc Zyngier { 1494d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1495c1d4d5cdSMarc Zyngier struct its_vlpi_map *map = get_vlpi_map(d); 1496d011e4e6SMarc Zyngier int ret = 0; 1497d011e4e6SMarc Zyngier 1498d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1499d011e4e6SMarc Zyngier 1500c1d4d5cdSMarc Zyngier if (!its_dev->event_map.vm || !map->vm) { 1501d011e4e6SMarc Zyngier ret = -EINVAL; 1502d011e4e6SMarc Zyngier goto out; 1503d011e4e6SMarc Zyngier } 1504d011e4e6SMarc Zyngier 1505d011e4e6SMarc Zyngier /* Copy our mapping information to the incoming request */ 1506c1d4d5cdSMarc Zyngier *info->map = *map; 1507d011e4e6SMarc Zyngier 1508d011e4e6SMarc Zyngier out: 1509d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1510d011e4e6SMarc Zyngier return ret; 1511d011e4e6SMarc Zyngier } 1512d011e4e6SMarc Zyngier 1513d011e4e6SMarc Zyngier static int its_vlpi_unmap(struct irq_data *d) 1514d011e4e6SMarc Zyngier { 1515d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1516d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1517d011e4e6SMarc Zyngier int ret = 0; 1518d011e4e6SMarc Zyngier 1519d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1520d011e4e6SMarc Zyngier 1521d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { 1522d011e4e6SMarc Zyngier ret = -EINVAL; 1523d011e4e6SMarc Zyngier goto out; 1524d011e4e6SMarc Zyngier } 1525d011e4e6SMarc Zyngier 1526d011e4e6SMarc Zyngier /* Drop the virtual mapping */ 1527d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1528d011e4e6SMarc Zyngier 1529d011e4e6SMarc Zyngier /* and restore the physical one */ 1530d011e4e6SMarc Zyngier irqd_clr_forwarded_to_vcpu(d); 1531d011e4e6SMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 1532d011e4e6SMarc Zyngier lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | 1533d011e4e6SMarc Zyngier LPI_PROP_ENABLED | 1534d011e4e6SMarc Zyngier LPI_PROP_GROUP1)); 1535d011e4e6SMarc Zyngier 15362247e1bfSMarc Zyngier /* Potentially unmap the VM from this ITS */ 15372247e1bfSMarc Zyngier its_unmap_vm(its_dev->its, its_dev->event_map.vm); 15382247e1bfSMarc Zyngier 1539d011e4e6SMarc Zyngier /* 1540d011e4e6SMarc Zyngier * Drop the refcount and make the device available again if 1541d011e4e6SMarc Zyngier * this was the last VLPI. 1542d011e4e6SMarc Zyngier */ 1543d011e4e6SMarc Zyngier if (!--its_dev->event_map.nr_vlpis) { 1544d011e4e6SMarc Zyngier its_dev->event_map.vm = NULL; 1545d011e4e6SMarc Zyngier kfree(its_dev->event_map.vlpi_maps); 1546d011e4e6SMarc Zyngier } 1547d011e4e6SMarc Zyngier 1548d011e4e6SMarc Zyngier out: 1549d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1550d011e4e6SMarc Zyngier return ret; 1551d011e4e6SMarc Zyngier } 1552d011e4e6SMarc Zyngier 1553015ec038SMarc Zyngier static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) 1554015ec038SMarc Zyngier { 1555015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1556015ec038SMarc Zyngier 1557015ec038SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) 1558015ec038SMarc Zyngier return -EINVAL; 1559015ec038SMarc Zyngier 1560015ec038SMarc Zyngier if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) 1561015ec038SMarc Zyngier lpi_update_config(d, 0xff, info->config); 1562015ec038SMarc Zyngier else 1563015ec038SMarc Zyngier lpi_write_config(d, 0xff, info->config); 1564015ec038SMarc Zyngier its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); 1565015ec038SMarc Zyngier 1566015ec038SMarc Zyngier return 0; 1567015ec038SMarc Zyngier } 1568015ec038SMarc Zyngier 1569c808eea8SMarc Zyngier static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 1570c808eea8SMarc Zyngier { 1571c808eea8SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1572c808eea8SMarc Zyngier struct its_cmd_info *info = vcpu_info; 1573c808eea8SMarc Zyngier 1574c808eea8SMarc Zyngier /* Need a v4 ITS */ 15750dd57fedSMarc Zyngier if (!is_v4(its_dev->its)) 1576c808eea8SMarc Zyngier return -EINVAL; 1577c808eea8SMarc Zyngier 1578d011e4e6SMarc Zyngier /* Unmap request? */ 1579d011e4e6SMarc Zyngier if (!info) 1580d011e4e6SMarc Zyngier return its_vlpi_unmap(d); 1581d011e4e6SMarc Zyngier 1582c808eea8SMarc Zyngier switch (info->cmd_type) { 1583c808eea8SMarc Zyngier case MAP_VLPI: 1584d011e4e6SMarc Zyngier return its_vlpi_map(d, info); 1585c808eea8SMarc Zyngier 1586c808eea8SMarc Zyngier case GET_VLPI: 1587d011e4e6SMarc Zyngier return its_vlpi_get(d, info); 1588c808eea8SMarc Zyngier 1589c808eea8SMarc Zyngier case PROP_UPDATE_VLPI: 1590c808eea8SMarc Zyngier case PROP_UPDATE_AND_INV_VLPI: 1591015ec038SMarc Zyngier return its_vlpi_prop_update(d, info); 1592c808eea8SMarc Zyngier 1593c808eea8SMarc Zyngier default: 1594c808eea8SMarc Zyngier return -EINVAL; 1595c808eea8SMarc Zyngier } 1596c808eea8SMarc Zyngier } 1597c808eea8SMarc Zyngier 1598c48ed51cSMarc Zyngier static struct irq_chip its_irq_chip = { 1599c48ed51cSMarc Zyngier .name = "ITS", 1600c48ed51cSMarc Zyngier .irq_mask = its_mask_irq, 1601c48ed51cSMarc Zyngier .irq_unmask = its_unmask_irq, 1602004fa08dSAshok Kumar .irq_eoi = irq_chip_eoi_parent, 1603c48ed51cSMarc Zyngier .irq_set_affinity = its_set_affinity, 1604b48ac83dSMarc Zyngier .irq_compose_msi_msg = its_irq_compose_msi_msg, 16058d85dcedSMarc Zyngier .irq_set_irqchip_state = its_irq_set_irqchip_state, 1606c808eea8SMarc Zyngier .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, 1607b48ac83dSMarc Zyngier }; 1608b48ac83dSMarc Zyngier 1609880cb3cdSMarc Zyngier 1610bf9529f8SMarc Zyngier /* 1611bf9529f8SMarc Zyngier * How we allocate LPIs: 1612bf9529f8SMarc Zyngier * 1613880cb3cdSMarc Zyngier * lpi_range_list contains ranges of LPIs that are to available to 1614880cb3cdSMarc Zyngier * allocate from. To allocate LPIs, just pick the first range that 1615880cb3cdSMarc Zyngier * fits the required allocation, and reduce it by the required 1616880cb3cdSMarc Zyngier * amount. Once empty, remove the range from the list. 1617bf9529f8SMarc Zyngier * 1618880cb3cdSMarc Zyngier * To free a range of LPIs, add a free range to the list, sort it and 1619880cb3cdSMarc Zyngier * merge the result if the new range happens to be adjacent to an 1620880cb3cdSMarc Zyngier * already free block. 1621880cb3cdSMarc Zyngier * 1622880cb3cdSMarc Zyngier * The consequence of the above is that allocation is cost is low, but 1623880cb3cdSMarc Zyngier * freeing is expensive. We assumes that freeing rarely occurs. 1624880cb3cdSMarc Zyngier */ 16254cb205c0SJia He #define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ 1626880cb3cdSMarc Zyngier 1627880cb3cdSMarc Zyngier static DEFINE_MUTEX(lpi_range_lock); 1628880cb3cdSMarc Zyngier static LIST_HEAD(lpi_range_list); 1629bf9529f8SMarc Zyngier 1630880cb3cdSMarc Zyngier struct lpi_range { 1631880cb3cdSMarc Zyngier struct list_head entry; 1632880cb3cdSMarc Zyngier u32 base_id; 1633880cb3cdSMarc Zyngier u32 span; 1634880cb3cdSMarc Zyngier }; 1635880cb3cdSMarc Zyngier 1636880cb3cdSMarc Zyngier static struct lpi_range *mk_lpi_range(u32 base, u32 span) 1637bf9529f8SMarc Zyngier { 1638880cb3cdSMarc Zyngier struct lpi_range *range; 1639880cb3cdSMarc Zyngier 16401c73fac5SRasmus Villemoes range = kmalloc(sizeof(*range), GFP_KERNEL); 1641880cb3cdSMarc Zyngier if (range) { 1642880cb3cdSMarc Zyngier range->base_id = base; 1643880cb3cdSMarc Zyngier range->span = span; 1644bf9529f8SMarc Zyngier } 1645bf9529f8SMarc Zyngier 1646880cb3cdSMarc Zyngier return range; 1647880cb3cdSMarc Zyngier } 1648880cb3cdSMarc Zyngier 1649880cb3cdSMarc Zyngier static int alloc_lpi_range(u32 nr_lpis, u32 *base) 1650880cb3cdSMarc Zyngier { 1651880cb3cdSMarc Zyngier struct lpi_range *range, *tmp; 1652880cb3cdSMarc Zyngier int err = -ENOSPC; 1653880cb3cdSMarc Zyngier 1654880cb3cdSMarc Zyngier mutex_lock(&lpi_range_lock); 1655880cb3cdSMarc Zyngier 1656880cb3cdSMarc Zyngier list_for_each_entry_safe(range, tmp, &lpi_range_list, entry) { 1657880cb3cdSMarc Zyngier if (range->span >= nr_lpis) { 1658880cb3cdSMarc Zyngier *base = range->base_id; 1659880cb3cdSMarc Zyngier range->base_id += nr_lpis; 1660880cb3cdSMarc Zyngier range->span -= nr_lpis; 1661880cb3cdSMarc Zyngier 1662880cb3cdSMarc Zyngier if (range->span == 0) { 1663880cb3cdSMarc Zyngier list_del(&range->entry); 1664880cb3cdSMarc Zyngier kfree(range); 1665880cb3cdSMarc Zyngier } 1666880cb3cdSMarc Zyngier 1667880cb3cdSMarc Zyngier err = 0; 1668880cb3cdSMarc Zyngier break; 1669880cb3cdSMarc Zyngier } 1670880cb3cdSMarc Zyngier } 1671880cb3cdSMarc Zyngier 1672880cb3cdSMarc Zyngier mutex_unlock(&lpi_range_lock); 1673880cb3cdSMarc Zyngier 1674880cb3cdSMarc Zyngier pr_debug("ITS: alloc %u:%u\n", *base, nr_lpis); 1675880cb3cdSMarc Zyngier return err; 1676880cb3cdSMarc Zyngier } 1677880cb3cdSMarc Zyngier 167812eade12SRasmus Villemoes static void merge_lpi_ranges(struct lpi_range *a, struct lpi_range *b) 167912eade12SRasmus Villemoes { 168012eade12SRasmus Villemoes if (&a->entry == &lpi_range_list || &b->entry == &lpi_range_list) 168112eade12SRasmus Villemoes return; 168212eade12SRasmus Villemoes if (a->base_id + a->span != b->base_id) 168312eade12SRasmus Villemoes return; 168412eade12SRasmus Villemoes b->base_id = a->base_id; 168512eade12SRasmus Villemoes b->span += a->span; 168612eade12SRasmus Villemoes list_del(&a->entry); 168712eade12SRasmus Villemoes kfree(a); 168812eade12SRasmus Villemoes } 168912eade12SRasmus Villemoes 1690880cb3cdSMarc Zyngier static int free_lpi_range(u32 base, u32 nr_lpis) 1691880cb3cdSMarc Zyngier { 169212eade12SRasmus Villemoes struct lpi_range *new, *old; 1693880cb3cdSMarc Zyngier 1694880cb3cdSMarc Zyngier new = mk_lpi_range(base, nr_lpis); 1695b31a3838SRasmus Villemoes if (!new) 1696b31a3838SRasmus Villemoes return -ENOMEM; 1697880cb3cdSMarc Zyngier 1698880cb3cdSMarc Zyngier mutex_lock(&lpi_range_lock); 1699880cb3cdSMarc Zyngier 170012eade12SRasmus Villemoes list_for_each_entry_reverse(old, &lpi_range_list, entry) { 170112eade12SRasmus Villemoes if (old->base_id < base) 170212eade12SRasmus Villemoes break; 1703880cb3cdSMarc Zyngier } 170412eade12SRasmus Villemoes /* 170512eade12SRasmus Villemoes * old is the last element with ->base_id smaller than base, 170612eade12SRasmus Villemoes * so new goes right after it. If there are no elements with 170712eade12SRasmus Villemoes * ->base_id smaller than base, &old->entry ends up pointing 170812eade12SRasmus Villemoes * at the head of the list, and inserting new it the start of 170912eade12SRasmus Villemoes * the list is the right thing to do in that case as well. 171012eade12SRasmus Villemoes */ 171112eade12SRasmus Villemoes list_add(&new->entry, &old->entry); 171212eade12SRasmus Villemoes /* 171312eade12SRasmus Villemoes * Now check if we can merge with the preceding and/or 171412eade12SRasmus Villemoes * following ranges. 171512eade12SRasmus Villemoes */ 171612eade12SRasmus Villemoes merge_lpi_ranges(old, new); 171712eade12SRasmus Villemoes merge_lpi_ranges(new, list_next_entry(new, entry)); 1718880cb3cdSMarc Zyngier 1719880cb3cdSMarc Zyngier mutex_unlock(&lpi_range_lock); 1720b31a3838SRasmus Villemoes return 0; 1721bf9529f8SMarc Zyngier } 1722bf9529f8SMarc Zyngier 172304a0e4deSTomasz Nowicki static int __init its_lpi_init(u32 id_bits) 1724bf9529f8SMarc Zyngier { 1725880cb3cdSMarc Zyngier u32 lpis = (1UL << id_bits) - 8192; 172612b2905aSMarc Zyngier u32 numlpis; 1727880cb3cdSMarc Zyngier int err; 1728bf9529f8SMarc Zyngier 172912b2905aSMarc Zyngier numlpis = 1UL << GICD_TYPER_NUM_LPIS(gic_rdists->gicd_typer); 173012b2905aSMarc Zyngier 173112b2905aSMarc Zyngier if (numlpis > 2 && !WARN_ON(numlpis > lpis)) { 173212b2905aSMarc Zyngier lpis = numlpis; 173312b2905aSMarc Zyngier pr_info("ITS: Using hypervisor restricted LPI range [%u]\n", 173412b2905aSMarc Zyngier lpis); 173512b2905aSMarc Zyngier } 173612b2905aSMarc Zyngier 1737880cb3cdSMarc Zyngier /* 1738880cb3cdSMarc Zyngier * Initializing the allocator is just the same as freeing the 1739880cb3cdSMarc Zyngier * full range of LPIs. 1740880cb3cdSMarc Zyngier */ 1741880cb3cdSMarc Zyngier err = free_lpi_range(8192, lpis); 1742880cb3cdSMarc Zyngier pr_debug("ITS: Allocator initialized for %u LPIs\n", lpis); 1743880cb3cdSMarc Zyngier return err; 1744bf9529f8SMarc Zyngier } 1745bf9529f8SMarc Zyngier 174638dd7c49SMarc Zyngier static unsigned long *its_lpi_alloc(int nr_irqs, u32 *base, int *nr_ids) 1747bf9529f8SMarc Zyngier { 1748bf9529f8SMarc Zyngier unsigned long *bitmap = NULL; 1749880cb3cdSMarc Zyngier int err = 0; 1750bf9529f8SMarc Zyngier 1751bf9529f8SMarc Zyngier do { 175238dd7c49SMarc Zyngier err = alloc_lpi_range(nr_irqs, base); 1753880cb3cdSMarc Zyngier if (!err) 1754bf9529f8SMarc Zyngier break; 1755bf9529f8SMarc Zyngier 175638dd7c49SMarc Zyngier nr_irqs /= 2; 175738dd7c49SMarc Zyngier } while (nr_irqs > 0); 1758bf9529f8SMarc Zyngier 175945725e0fSMarc Zyngier if (!nr_irqs) 176045725e0fSMarc Zyngier err = -ENOSPC; 176145725e0fSMarc Zyngier 1762880cb3cdSMarc Zyngier if (err) 1763bf9529f8SMarc Zyngier goto out; 1764bf9529f8SMarc Zyngier 176538dd7c49SMarc Zyngier bitmap = kcalloc(BITS_TO_LONGS(nr_irqs), sizeof (long), GFP_ATOMIC); 1766bf9529f8SMarc Zyngier if (!bitmap) 1767bf9529f8SMarc Zyngier goto out; 1768bf9529f8SMarc Zyngier 176938dd7c49SMarc Zyngier *nr_ids = nr_irqs; 1770bf9529f8SMarc Zyngier 1771bf9529f8SMarc Zyngier out: 1772c8415b94SMarc Zyngier if (!bitmap) 1773c8415b94SMarc Zyngier *base = *nr_ids = 0; 1774c8415b94SMarc Zyngier 1775bf9529f8SMarc Zyngier return bitmap; 1776bf9529f8SMarc Zyngier } 1777bf9529f8SMarc Zyngier 177838dd7c49SMarc Zyngier static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids) 1779bf9529f8SMarc Zyngier { 1780880cb3cdSMarc Zyngier WARN_ON(free_lpi_range(base, nr_ids)); 1781cf2be8baSMarc Zyngier kfree(bitmap); 1782bf9529f8SMarc Zyngier } 17831ac19ca6SMarc Zyngier 1784053be485SMarc Zyngier static void gic_reset_prop_table(void *va) 1785053be485SMarc Zyngier { 1786053be485SMarc Zyngier /* Priority 0xa0, Group-1, disabled */ 1787053be485SMarc Zyngier memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ); 1788053be485SMarc Zyngier 1789053be485SMarc Zyngier /* Make sure the GIC will observe the written configuration */ 1790053be485SMarc Zyngier gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ); 1791053be485SMarc Zyngier } 1792053be485SMarc Zyngier 17930e5ccf91SMarc Zyngier static struct page *its_allocate_prop_table(gfp_t gfp_flags) 17940e5ccf91SMarc Zyngier { 17950e5ccf91SMarc Zyngier struct page *prop_page; 17961ac19ca6SMarc Zyngier 17970e5ccf91SMarc Zyngier prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); 17980e5ccf91SMarc Zyngier if (!prop_page) 17990e5ccf91SMarc Zyngier return NULL; 18000e5ccf91SMarc Zyngier 1801053be485SMarc Zyngier gic_reset_prop_table(page_address(prop_page)); 18020e5ccf91SMarc Zyngier 18030e5ccf91SMarc Zyngier return prop_page; 18040e5ccf91SMarc Zyngier } 18050e5ccf91SMarc Zyngier 18067d75bbb4SMarc Zyngier static void its_free_prop_table(struct page *prop_page) 18077d75bbb4SMarc Zyngier { 18087d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(prop_page), 18097d75bbb4SMarc Zyngier get_order(LPI_PROPBASE_SZ)); 18107d75bbb4SMarc Zyngier } 18111ac19ca6SMarc Zyngier 18125e2c9f9aSMarc Zyngier static bool gic_check_reserved_range(phys_addr_t addr, unsigned long size) 18135e2c9f9aSMarc Zyngier { 18145e2c9f9aSMarc Zyngier phys_addr_t start, end, addr_end; 18155e2c9f9aSMarc Zyngier u64 i; 18165e2c9f9aSMarc Zyngier 18175e2c9f9aSMarc Zyngier /* 18185e2c9f9aSMarc Zyngier * We don't bother checking for a kdump kernel as by 18195e2c9f9aSMarc Zyngier * construction, the LPI tables are out of this kernel's 18205e2c9f9aSMarc Zyngier * memory map. 18215e2c9f9aSMarc Zyngier */ 18225e2c9f9aSMarc Zyngier if (is_kdump_kernel()) 18235e2c9f9aSMarc Zyngier return true; 18245e2c9f9aSMarc Zyngier 18255e2c9f9aSMarc Zyngier addr_end = addr + size - 1; 18265e2c9f9aSMarc Zyngier 18275e2c9f9aSMarc Zyngier for_each_reserved_mem_region(i, &start, &end) { 18285e2c9f9aSMarc Zyngier if (addr >= start && addr_end <= end) 18295e2c9f9aSMarc Zyngier return true; 18305e2c9f9aSMarc Zyngier } 18315e2c9f9aSMarc Zyngier 18325e2c9f9aSMarc Zyngier /* Not found, not a good sign... */ 18335e2c9f9aSMarc Zyngier pr_warn("GICv3: Expected reserved range [%pa:%pa], not found\n", 18345e2c9f9aSMarc Zyngier &addr, &addr_end); 18355e2c9f9aSMarc Zyngier add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 18365e2c9f9aSMarc Zyngier return false; 18375e2c9f9aSMarc Zyngier } 18385e2c9f9aSMarc Zyngier 18393fb68faeSMarc Zyngier static int gic_reserve_range(phys_addr_t addr, unsigned long size) 18403fb68faeSMarc Zyngier { 18413fb68faeSMarc Zyngier if (efi_enabled(EFI_CONFIG_TABLES)) 18423fb68faeSMarc Zyngier return efi_mem_reserve_persistent(addr, size); 18433fb68faeSMarc Zyngier 18443fb68faeSMarc Zyngier return 0; 18453fb68faeSMarc Zyngier } 18463fb68faeSMarc Zyngier 184711e37d35SMarc Zyngier static int __init its_setup_lpi_prop_table(void) 18481ac19ca6SMarc Zyngier { 1849c440a9d9SMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) { 1850c440a9d9SMarc Zyngier u64 val; 1851c440a9d9SMarc Zyngier 1852c440a9d9SMarc Zyngier val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); 1853c440a9d9SMarc Zyngier lpi_id_bits = (val & GICR_PROPBASER_IDBITS_MASK) + 1; 1854c440a9d9SMarc Zyngier 1855c440a9d9SMarc Zyngier gic_rdists->prop_table_pa = val & GENMASK_ULL(51, 12); 1856c440a9d9SMarc Zyngier gic_rdists->prop_table_va = memremap(gic_rdists->prop_table_pa, 1857c440a9d9SMarc Zyngier LPI_PROPBASE_SZ, 1858c440a9d9SMarc Zyngier MEMREMAP_WB); 1859c440a9d9SMarc Zyngier gic_reset_prop_table(gic_rdists->prop_table_va); 1860c440a9d9SMarc Zyngier } else { 1861e1a2e201SMarc Zyngier struct page *page; 18621ac19ca6SMarc Zyngier 1863c440a9d9SMarc Zyngier lpi_id_bits = min_t(u32, 1864c440a9d9SMarc Zyngier GICD_TYPER_ID_BITS(gic_rdists->gicd_typer), 18654cb205c0SJia He ITS_MAX_LPI_NRBITS); 1866e1a2e201SMarc Zyngier page = its_allocate_prop_table(GFP_NOWAIT); 1867e1a2e201SMarc Zyngier if (!page) { 18681ac19ca6SMarc Zyngier pr_err("Failed to allocate PROPBASE\n"); 18691ac19ca6SMarc Zyngier return -ENOMEM; 18701ac19ca6SMarc Zyngier } 18711ac19ca6SMarc Zyngier 1872e1a2e201SMarc Zyngier gic_rdists->prop_table_pa = page_to_phys(page); 1873e1a2e201SMarc Zyngier gic_rdists->prop_table_va = page_address(page); 18743fb68faeSMarc Zyngier WARN_ON(gic_reserve_range(gic_rdists->prop_table_pa, 18753fb68faeSMarc Zyngier LPI_PROPBASE_SZ)); 1876c440a9d9SMarc Zyngier } 1877e1a2e201SMarc Zyngier 1878e1a2e201SMarc Zyngier pr_info("GICv3: using LPI property table @%pa\n", 1879e1a2e201SMarc Zyngier &gic_rdists->prop_table_pa); 18801ac19ca6SMarc Zyngier 18816c31e123SShanker Donthineni return its_lpi_init(lpi_id_bits); 18821ac19ca6SMarc Zyngier } 18831ac19ca6SMarc Zyngier 18841ac19ca6SMarc Zyngier static const char *its_base_type_string[] = { 18851ac19ca6SMarc Zyngier [GITS_BASER_TYPE_DEVICE] = "Devices", 18861ac19ca6SMarc Zyngier [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", 18874f46de9dSMarc Zyngier [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", 18881ac19ca6SMarc Zyngier [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", 18891ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", 18901ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", 18911ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", 18921ac19ca6SMarc Zyngier }; 18931ac19ca6SMarc Zyngier 18942d81d425SShanker Donthineni static u64 its_read_baser(struct its_node *its, struct its_baser *baser) 18952d81d425SShanker Donthineni { 18962d81d425SShanker Donthineni u32 idx = baser - its->tables; 18972d81d425SShanker Donthineni 18980968a619SVladimir Murzin return gits_read_baser(its->base + GITS_BASER + (idx << 3)); 18992d81d425SShanker Donthineni } 19002d81d425SShanker Donthineni 19012d81d425SShanker Donthineni static void its_write_baser(struct its_node *its, struct its_baser *baser, 19022d81d425SShanker Donthineni u64 val) 19032d81d425SShanker Donthineni { 19042d81d425SShanker Donthineni u32 idx = baser - its->tables; 19052d81d425SShanker Donthineni 19060968a619SVladimir Murzin gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); 19072d81d425SShanker Donthineni baser->val = its_read_baser(its, baser); 19082d81d425SShanker Donthineni } 19092d81d425SShanker Donthineni 19109347359aSShanker Donthineni static int its_setup_baser(struct its_node *its, struct its_baser *baser, 19113faf24eaSShanker Donthineni u64 cache, u64 shr, u32 psz, u32 order, 19123faf24eaSShanker Donthineni bool indirect) 19139347359aSShanker Donthineni { 19149347359aSShanker Donthineni u64 val = its_read_baser(its, baser); 19159347359aSShanker Donthineni u64 esz = GITS_BASER_ENTRY_SIZE(val); 19169347359aSShanker Donthineni u64 type = GITS_BASER_TYPE(val); 191730ae9610SShanker Donthineni u64 baser_phys, tmp; 19189347359aSShanker Donthineni u32 alloc_pages; 1919539d3782SShanker Donthineni struct page *page; 19209347359aSShanker Donthineni void *base; 19219347359aSShanker Donthineni 19229347359aSShanker Donthineni retry_alloc_baser: 19239347359aSShanker Donthineni alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); 19249347359aSShanker Donthineni if (alloc_pages > GITS_BASER_PAGES_MAX) { 19259347359aSShanker Donthineni pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", 19269347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 19279347359aSShanker Donthineni alloc_pages, GITS_BASER_PAGES_MAX); 19289347359aSShanker Donthineni alloc_pages = GITS_BASER_PAGES_MAX; 19299347359aSShanker Donthineni order = get_order(GITS_BASER_PAGES_MAX * psz); 19309347359aSShanker Donthineni } 19319347359aSShanker Donthineni 1932539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, order); 1933539d3782SShanker Donthineni if (!page) 19349347359aSShanker Donthineni return -ENOMEM; 19359347359aSShanker Donthineni 1936539d3782SShanker Donthineni base = (void *)page_address(page); 193730ae9610SShanker Donthineni baser_phys = virt_to_phys(base); 193830ae9610SShanker Donthineni 193930ae9610SShanker Donthineni /* Check if the physical address of the memory is above 48bits */ 194030ae9610SShanker Donthineni if (IS_ENABLED(CONFIG_ARM64_64K_PAGES) && (baser_phys >> 48)) { 194130ae9610SShanker Donthineni 194230ae9610SShanker Donthineni /* 52bit PA is supported only when PageSize=64K */ 194330ae9610SShanker Donthineni if (psz != SZ_64K) { 194430ae9610SShanker Donthineni pr_err("ITS: no 52bit PA support when psz=%d\n", psz); 194530ae9610SShanker Donthineni free_pages((unsigned long)base, order); 194630ae9610SShanker Donthineni return -ENXIO; 194730ae9610SShanker Donthineni } 194830ae9610SShanker Donthineni 194930ae9610SShanker Donthineni /* Convert 52bit PA to 48bit field */ 195030ae9610SShanker Donthineni baser_phys = GITS_BASER_PHYS_52_to_48(baser_phys); 195130ae9610SShanker Donthineni } 195230ae9610SShanker Donthineni 19539347359aSShanker Donthineni retry_baser: 195430ae9610SShanker Donthineni val = (baser_phys | 19559347359aSShanker Donthineni (type << GITS_BASER_TYPE_SHIFT) | 19569347359aSShanker Donthineni ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | 19579347359aSShanker Donthineni ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | 19589347359aSShanker Donthineni cache | 19599347359aSShanker Donthineni shr | 19609347359aSShanker Donthineni GITS_BASER_VALID); 19619347359aSShanker Donthineni 19623faf24eaSShanker Donthineni val |= indirect ? GITS_BASER_INDIRECT : 0x0; 19633faf24eaSShanker Donthineni 19649347359aSShanker Donthineni switch (psz) { 19659347359aSShanker Donthineni case SZ_4K: 19669347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_4K; 19679347359aSShanker Donthineni break; 19689347359aSShanker Donthineni case SZ_16K: 19699347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_16K; 19709347359aSShanker Donthineni break; 19719347359aSShanker Donthineni case SZ_64K: 19729347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_64K; 19739347359aSShanker Donthineni break; 19749347359aSShanker Donthineni } 19759347359aSShanker Donthineni 19769347359aSShanker Donthineni its_write_baser(its, baser, val); 19779347359aSShanker Donthineni tmp = baser->val; 19789347359aSShanker Donthineni 19799347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { 19809347359aSShanker Donthineni /* 19819347359aSShanker Donthineni * Shareability didn't stick. Just use 19829347359aSShanker Donthineni * whatever the read reported, which is likely 19839347359aSShanker Donthineni * to be the only thing this redistributor 19849347359aSShanker Donthineni * supports. If that's zero, make it 19859347359aSShanker Donthineni * non-cacheable as well. 19869347359aSShanker Donthineni */ 19879347359aSShanker Donthineni shr = tmp & GITS_BASER_SHAREABILITY_MASK; 19889347359aSShanker Donthineni if (!shr) { 19899347359aSShanker Donthineni cache = GITS_BASER_nC; 1990328191c0SVladimir Murzin gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); 19919347359aSShanker Donthineni } 19929347359aSShanker Donthineni goto retry_baser; 19939347359aSShanker Donthineni } 19949347359aSShanker Donthineni 19959347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_PAGE_SIZE_MASK) { 19969347359aSShanker Donthineni /* 19979347359aSShanker Donthineni * Page size didn't stick. Let's try a smaller 19989347359aSShanker Donthineni * size and retry. If we reach 4K, then 19999347359aSShanker Donthineni * something is horribly wrong... 20009347359aSShanker Donthineni */ 20019347359aSShanker Donthineni free_pages((unsigned long)base, order); 20029347359aSShanker Donthineni baser->base = NULL; 20039347359aSShanker Donthineni 20049347359aSShanker Donthineni switch (psz) { 20059347359aSShanker Donthineni case SZ_16K: 20069347359aSShanker Donthineni psz = SZ_4K; 20079347359aSShanker Donthineni goto retry_alloc_baser; 20089347359aSShanker Donthineni case SZ_64K: 20099347359aSShanker Donthineni psz = SZ_16K; 20109347359aSShanker Donthineni goto retry_alloc_baser; 20119347359aSShanker Donthineni } 20129347359aSShanker Donthineni } 20139347359aSShanker Donthineni 20149347359aSShanker Donthineni if (val != tmp) { 2015b11283ebSVladimir Murzin pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", 20169347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 2017b11283ebSVladimir Murzin val, tmp); 20189347359aSShanker Donthineni free_pages((unsigned long)base, order); 20199347359aSShanker Donthineni return -ENXIO; 20209347359aSShanker Donthineni } 20219347359aSShanker Donthineni 20229347359aSShanker Donthineni baser->order = order; 20239347359aSShanker Donthineni baser->base = base; 20249347359aSShanker Donthineni baser->psz = psz; 20253faf24eaSShanker Donthineni tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; 20269347359aSShanker Donthineni 20273faf24eaSShanker Donthineni pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", 2028d524eaa2SVladimir Murzin &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), 20299347359aSShanker Donthineni its_base_type_string[type], 20309347359aSShanker Donthineni (unsigned long)virt_to_phys(base), 20313faf24eaSShanker Donthineni indirect ? "indirect" : "flat", (int)esz, 20329347359aSShanker Donthineni psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); 20339347359aSShanker Donthineni 20349347359aSShanker Donthineni return 0; 20359347359aSShanker Donthineni } 20369347359aSShanker Donthineni 20374cacac57SMarc Zyngier static bool its_parse_indirect_baser(struct its_node *its, 20384cacac57SMarc Zyngier struct its_baser *baser, 203932bd44dcSShanker Donthineni u32 psz, u32 *order, u32 ids) 20404b75c459SShanker Donthineni { 20414cacac57SMarc Zyngier u64 tmp = its_read_baser(its, baser); 20424cacac57SMarc Zyngier u64 type = GITS_BASER_TYPE(tmp); 20434cacac57SMarc Zyngier u64 esz = GITS_BASER_ENTRY_SIZE(tmp); 20442fd632a0SShanker Donthineni u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; 20454b75c459SShanker Donthineni u32 new_order = *order; 20463faf24eaSShanker Donthineni bool indirect = false; 20473faf24eaSShanker Donthineni 20483faf24eaSShanker Donthineni /* No need to enable Indirection if memory requirement < (psz*2)bytes */ 20493faf24eaSShanker Donthineni if ((esz << ids) > (psz * 2)) { 20503faf24eaSShanker Donthineni /* 20513faf24eaSShanker Donthineni * Find out whether hw supports a single or two-level table by 20523faf24eaSShanker Donthineni * table by reading bit at offset '62' after writing '1' to it. 20533faf24eaSShanker Donthineni */ 20543faf24eaSShanker Donthineni its_write_baser(its, baser, val | GITS_BASER_INDIRECT); 20553faf24eaSShanker Donthineni indirect = !!(baser->val & GITS_BASER_INDIRECT); 20563faf24eaSShanker Donthineni 20573faf24eaSShanker Donthineni if (indirect) { 20583faf24eaSShanker Donthineni /* 20593faf24eaSShanker Donthineni * The size of the lvl2 table is equal to ITS page size 20603faf24eaSShanker Donthineni * which is 'psz'. For computing lvl1 table size, 20613faf24eaSShanker Donthineni * subtract ID bits that sparse lvl2 table from 'ids' 20623faf24eaSShanker Donthineni * which is reported by ITS hardware times lvl1 table 20633faf24eaSShanker Donthineni * entry size. 20643faf24eaSShanker Donthineni */ 2065d524eaa2SVladimir Murzin ids -= ilog2(psz / (int)esz); 20663faf24eaSShanker Donthineni esz = GITS_LVL1_ENTRY_SIZE; 20673faf24eaSShanker Donthineni } 20683faf24eaSShanker Donthineni } 20694b75c459SShanker Donthineni 20704b75c459SShanker Donthineni /* 20714b75c459SShanker Donthineni * Allocate as many entries as required to fit the 20724b75c459SShanker Donthineni * range of device IDs that the ITS can grok... The ID 20734b75c459SShanker Donthineni * space being incredibly sparse, this results in a 20743faf24eaSShanker Donthineni * massive waste of memory if two-level device table 20753faf24eaSShanker Donthineni * feature is not supported by hardware. 20764b75c459SShanker Donthineni */ 20774b75c459SShanker Donthineni new_order = max_t(u32, get_order(esz << ids), new_order); 20784b75c459SShanker Donthineni if (new_order >= MAX_ORDER) { 20794b75c459SShanker Donthineni new_order = MAX_ORDER - 1; 2080d524eaa2SVladimir Murzin ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); 2081576a8342SMarc Zyngier pr_warn("ITS@%pa: %s Table too large, reduce ids %llu->%u\n", 20824cacac57SMarc Zyngier &its->phys_base, its_base_type_string[type], 2083576a8342SMarc Zyngier device_ids(its), ids); 20844b75c459SShanker Donthineni } 20854b75c459SShanker Donthineni 20864b75c459SShanker Donthineni *order = new_order; 20873faf24eaSShanker Donthineni 20883faf24eaSShanker Donthineni return indirect; 20894b75c459SShanker Donthineni } 20904b75c459SShanker Donthineni 20911ac19ca6SMarc Zyngier static void its_free_tables(struct its_node *its) 20921ac19ca6SMarc Zyngier { 20931ac19ca6SMarc Zyngier int i; 20941ac19ca6SMarc Zyngier 20951ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 20961a485f4dSShanker Donthineni if (its->tables[i].base) { 20971a485f4dSShanker Donthineni free_pages((unsigned long)its->tables[i].base, 20981a485f4dSShanker Donthineni its->tables[i].order); 20991a485f4dSShanker Donthineni its->tables[i].base = NULL; 21001ac19ca6SMarc Zyngier } 21011ac19ca6SMarc Zyngier } 21021ac19ca6SMarc Zyngier } 21031ac19ca6SMarc Zyngier 21040e0b0f69SShanker Donthineni static int its_alloc_tables(struct its_node *its) 21051ac19ca6SMarc Zyngier { 21061ac19ca6SMarc Zyngier u64 shr = GITS_BASER_InnerShareable; 21072fd632a0SShanker Donthineni u64 cache = GITS_BASER_RaWaWb; 21089347359aSShanker Donthineni u32 psz = SZ_64K; 21099347359aSShanker Donthineni int err, i; 211094100970SRobert Richter 2111fa150019SArd Biesheuvel if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) 2112fa150019SArd Biesheuvel /* erratum 24313: ignore memory access type */ 21139347359aSShanker Donthineni cache = GITS_BASER_nCnB; 2114466b7d16SShanker Donthineni 21151ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 21162d81d425SShanker Donthineni struct its_baser *baser = its->tables + i; 21172d81d425SShanker Donthineni u64 val = its_read_baser(its, baser); 21181ac19ca6SMarc Zyngier u64 type = GITS_BASER_TYPE(val); 21199347359aSShanker Donthineni u32 order = get_order(psz); 21203faf24eaSShanker Donthineni bool indirect = false; 21211ac19ca6SMarc Zyngier 21224cacac57SMarc Zyngier switch (type) { 21234cacac57SMarc Zyngier case GITS_BASER_TYPE_NONE: 21241ac19ca6SMarc Zyngier continue; 21251ac19ca6SMarc Zyngier 21264cacac57SMarc Zyngier case GITS_BASER_TYPE_DEVICE: 212732bd44dcSShanker Donthineni indirect = its_parse_indirect_baser(its, baser, 212832bd44dcSShanker Donthineni psz, &order, 2129576a8342SMarc Zyngier device_ids(its)); 21308d565748SZenghui Yu break; 21318d565748SZenghui Yu 21324cacac57SMarc Zyngier case GITS_BASER_TYPE_VCPU: 21334cacac57SMarc Zyngier indirect = its_parse_indirect_baser(its, baser, 213432bd44dcSShanker Donthineni psz, &order, 213532bd44dcSShanker Donthineni ITS_MAX_VPEID_BITS); 21364cacac57SMarc Zyngier break; 21374cacac57SMarc Zyngier } 2138f54b97edSMarc Zyngier 21393faf24eaSShanker Donthineni err = its_setup_baser(its, baser, cache, shr, psz, order, indirect); 21409347359aSShanker Donthineni if (err < 0) { 21419347359aSShanker Donthineni its_free_tables(its); 21429347359aSShanker Donthineni return err; 214330f21363SRobert Richter } 214430f21363SRobert Richter 21459347359aSShanker Donthineni /* Update settings which will be used for next BASERn */ 21469347359aSShanker Donthineni psz = baser->psz; 21479347359aSShanker Donthineni cache = baser->val & GITS_BASER_CACHEABILITY_MASK; 21489347359aSShanker Donthineni shr = baser->val & GITS_BASER_SHAREABILITY_MASK; 21491ac19ca6SMarc Zyngier } 21501ac19ca6SMarc Zyngier 21511ac19ca6SMarc Zyngier return 0; 21521ac19ca6SMarc Zyngier } 21531ac19ca6SMarc Zyngier 21541ac19ca6SMarc Zyngier static int its_alloc_collections(struct its_node *its) 21551ac19ca6SMarc Zyngier { 215683559b47SMarc Zyngier int i; 215783559b47SMarc Zyngier 21586396bb22SKees Cook its->collections = kcalloc(nr_cpu_ids, sizeof(*its->collections), 21591ac19ca6SMarc Zyngier GFP_KERNEL); 21601ac19ca6SMarc Zyngier if (!its->collections) 21611ac19ca6SMarc Zyngier return -ENOMEM; 21621ac19ca6SMarc Zyngier 216383559b47SMarc Zyngier for (i = 0; i < nr_cpu_ids; i++) 216483559b47SMarc Zyngier its->collections[i].target_address = ~0ULL; 216583559b47SMarc Zyngier 21661ac19ca6SMarc Zyngier return 0; 21671ac19ca6SMarc Zyngier } 21681ac19ca6SMarc Zyngier 21697c297a2dSMarc Zyngier static struct page *its_allocate_pending_table(gfp_t gfp_flags) 21707c297a2dSMarc Zyngier { 21717c297a2dSMarc Zyngier struct page *pend_page; 2172adaab500SMarc Zyngier 21737c297a2dSMarc Zyngier pend_page = alloc_pages(gfp_flags | __GFP_ZERO, 2174adaab500SMarc Zyngier get_order(LPI_PENDBASE_SZ)); 21757c297a2dSMarc Zyngier if (!pend_page) 21767c297a2dSMarc Zyngier return NULL; 21777c297a2dSMarc Zyngier 21787c297a2dSMarc Zyngier /* Make sure the GIC will observe the zero-ed page */ 21797c297a2dSMarc Zyngier gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); 21807c297a2dSMarc Zyngier 21817c297a2dSMarc Zyngier return pend_page; 21827c297a2dSMarc Zyngier } 21837c297a2dSMarc Zyngier 21847d75bbb4SMarc Zyngier static void its_free_pending_table(struct page *pt) 21857d75bbb4SMarc Zyngier { 2186adaab500SMarc Zyngier free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ)); 21877d75bbb4SMarc Zyngier } 21887d75bbb4SMarc Zyngier 2189c6e2ccb6SMarc Zyngier /* 21905e2c9f9aSMarc Zyngier * Booting with kdump and LPIs enabled is generally fine. Any other 21915e2c9f9aSMarc Zyngier * case is wrong in the absence of firmware/EFI support. 2192c6e2ccb6SMarc Zyngier */ 2193c440a9d9SMarc Zyngier static bool enabled_lpis_allowed(void) 2194c440a9d9SMarc Zyngier { 21955e2c9f9aSMarc Zyngier phys_addr_t addr; 21965e2c9f9aSMarc Zyngier u64 val; 2197c6e2ccb6SMarc Zyngier 21985e2c9f9aSMarc Zyngier /* Check whether the property table is in a reserved region */ 21995e2c9f9aSMarc Zyngier val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); 22005e2c9f9aSMarc Zyngier addr = val & GENMASK_ULL(51, 12); 22015e2c9f9aSMarc Zyngier 22025e2c9f9aSMarc Zyngier return gic_check_reserved_range(addr, LPI_PROPBASE_SZ); 2203c440a9d9SMarc Zyngier } 2204c440a9d9SMarc Zyngier 220511e37d35SMarc Zyngier static int __init allocate_lpi_tables(void) 220611e37d35SMarc Zyngier { 2207c440a9d9SMarc Zyngier u64 val; 220811e37d35SMarc Zyngier int err, cpu; 220911e37d35SMarc Zyngier 2210c440a9d9SMarc Zyngier /* 2211c440a9d9SMarc Zyngier * If LPIs are enabled while we run this from the boot CPU, 2212c440a9d9SMarc Zyngier * flag the RD tables as pre-allocated if the stars do align. 2213c440a9d9SMarc Zyngier */ 2214c440a9d9SMarc Zyngier val = readl_relaxed(gic_data_rdist_rd_base() + GICR_CTLR); 2215c440a9d9SMarc Zyngier if ((val & GICR_CTLR_ENABLE_LPIS) && enabled_lpis_allowed()) { 2216c440a9d9SMarc Zyngier gic_rdists->flags |= (RDIST_FLAGS_RD_TABLES_PREALLOCATED | 2217c440a9d9SMarc Zyngier RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING); 2218c440a9d9SMarc Zyngier pr_info("GICv3: Using preallocated redistributor tables\n"); 2219c440a9d9SMarc Zyngier } 2220c440a9d9SMarc Zyngier 222111e37d35SMarc Zyngier err = its_setup_lpi_prop_table(); 222211e37d35SMarc Zyngier if (err) 222311e37d35SMarc Zyngier return err; 222411e37d35SMarc Zyngier 222511e37d35SMarc Zyngier /* 222611e37d35SMarc Zyngier * We allocate all the pending tables anyway, as we may have a 222711e37d35SMarc Zyngier * mix of RDs that have had LPIs enabled, and some that 222811e37d35SMarc Zyngier * don't. We'll free the unused ones as each CPU comes online. 222911e37d35SMarc Zyngier */ 223011e37d35SMarc Zyngier for_each_possible_cpu(cpu) { 223111e37d35SMarc Zyngier struct page *pend_page; 223211e37d35SMarc Zyngier 223311e37d35SMarc Zyngier pend_page = its_allocate_pending_table(GFP_NOWAIT); 223411e37d35SMarc Zyngier if (!pend_page) { 223511e37d35SMarc Zyngier pr_err("Failed to allocate PENDBASE for CPU%d\n", cpu); 223611e37d35SMarc Zyngier return -ENOMEM; 223711e37d35SMarc Zyngier } 223811e37d35SMarc Zyngier 223911e37d35SMarc Zyngier gic_data_rdist_cpu(cpu)->pend_page = pend_page; 224011e37d35SMarc Zyngier } 224111e37d35SMarc Zyngier 224211e37d35SMarc Zyngier return 0; 224311e37d35SMarc Zyngier } 224411e37d35SMarc Zyngier 22456479450fSHeyi Guo static u64 its_clear_vpend_valid(void __iomem *vlpi_base) 22466479450fSHeyi Guo { 22476479450fSHeyi Guo u32 count = 1000000; /* 1s! */ 22486479450fSHeyi Guo bool clean; 22496479450fSHeyi Guo u64 val; 22506479450fSHeyi Guo 22516479450fSHeyi Guo val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 22526479450fSHeyi Guo val &= ~GICR_VPENDBASER_Valid; 22536479450fSHeyi Guo gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 22546479450fSHeyi Guo 22556479450fSHeyi Guo do { 22566479450fSHeyi Guo val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 22576479450fSHeyi Guo clean = !(val & GICR_VPENDBASER_Dirty); 22586479450fSHeyi Guo if (!clean) { 22596479450fSHeyi Guo count--; 22606479450fSHeyi Guo cpu_relax(); 22616479450fSHeyi Guo udelay(1); 22626479450fSHeyi Guo } 22636479450fSHeyi Guo } while (!clean && count); 22646479450fSHeyi Guo 22656479450fSHeyi Guo return val; 22666479450fSHeyi Guo } 22676479450fSHeyi Guo 22681ac19ca6SMarc Zyngier static void its_cpu_init_lpis(void) 22691ac19ca6SMarc Zyngier { 22701ac19ca6SMarc Zyngier void __iomem *rbase = gic_data_rdist_rd_base(); 22711ac19ca6SMarc Zyngier struct page *pend_page; 227211e37d35SMarc Zyngier phys_addr_t paddr; 22731ac19ca6SMarc Zyngier u64 val, tmp; 22741ac19ca6SMarc Zyngier 227511e37d35SMarc Zyngier if (gic_data_rdist()->lpi_enabled) 22761ac19ca6SMarc Zyngier return; 22771ac19ca6SMarc Zyngier 2278c440a9d9SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 2279c440a9d9SMarc Zyngier if ((gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) && 2280c440a9d9SMarc Zyngier (val & GICR_CTLR_ENABLE_LPIS)) { 2281f842ca8eSMarc Zyngier /* 2282f842ca8eSMarc Zyngier * Check that we get the same property table on all 2283f842ca8eSMarc Zyngier * RDs. If we don't, this is hopeless. 2284f842ca8eSMarc Zyngier */ 2285f842ca8eSMarc Zyngier paddr = gicr_read_propbaser(rbase + GICR_PROPBASER); 2286f842ca8eSMarc Zyngier paddr &= GENMASK_ULL(51, 12); 2287f842ca8eSMarc Zyngier if (WARN_ON(gic_rdists->prop_table_pa != paddr)) 2288f842ca8eSMarc Zyngier add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 2289f842ca8eSMarc Zyngier 2290c440a9d9SMarc Zyngier paddr = gicr_read_pendbaser(rbase + GICR_PENDBASER); 2291c440a9d9SMarc Zyngier paddr &= GENMASK_ULL(51, 16); 2292c440a9d9SMarc Zyngier 22935e2c9f9aSMarc Zyngier WARN_ON(!gic_check_reserved_range(paddr, LPI_PENDBASE_SZ)); 2294c440a9d9SMarc Zyngier its_free_pending_table(gic_data_rdist()->pend_page); 2295c440a9d9SMarc Zyngier gic_data_rdist()->pend_page = NULL; 2296c440a9d9SMarc Zyngier 2297c440a9d9SMarc Zyngier goto out; 2298c440a9d9SMarc Zyngier } 2299c440a9d9SMarc Zyngier 230011e37d35SMarc Zyngier pend_page = gic_data_rdist()->pend_page; 23011ac19ca6SMarc Zyngier paddr = page_to_phys(pend_page); 23023fb68faeSMarc Zyngier WARN_ON(gic_reserve_range(paddr, LPI_PENDBASE_SZ)); 23031ac19ca6SMarc Zyngier 23041ac19ca6SMarc Zyngier /* set PROPBASE */ 2305e1a2e201SMarc Zyngier val = (gic_rdists->prop_table_pa | 23061ac19ca6SMarc Zyngier GICR_PROPBASER_InnerShareable | 23072fd632a0SShanker Donthineni GICR_PROPBASER_RaWaWb | 23081ac19ca6SMarc Zyngier ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); 23091ac19ca6SMarc Zyngier 23100968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 23110968a619SVladimir Murzin tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); 23121ac19ca6SMarc Zyngier 23131ac19ca6SMarc Zyngier if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { 2314241a386cSMarc Zyngier if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { 2315241a386cSMarc Zyngier /* 2316241a386cSMarc Zyngier * The HW reports non-shareable, we must 2317241a386cSMarc Zyngier * remove the cacheability attributes as 2318241a386cSMarc Zyngier * well. 2319241a386cSMarc Zyngier */ 2320241a386cSMarc Zyngier val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | 2321241a386cSMarc Zyngier GICR_PROPBASER_CACHEABILITY_MASK); 2322241a386cSMarc Zyngier val |= GICR_PROPBASER_nC; 23230968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 2324241a386cSMarc Zyngier } 23251ac19ca6SMarc Zyngier pr_info_once("GIC: using cache flushing for LPI property table\n"); 23261ac19ca6SMarc Zyngier gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; 23271ac19ca6SMarc Zyngier } 23281ac19ca6SMarc Zyngier 23291ac19ca6SMarc Zyngier /* set PENDBASE */ 23301ac19ca6SMarc Zyngier val = (page_to_phys(pend_page) | 23314ad3e363SMarc Zyngier GICR_PENDBASER_InnerShareable | 23322fd632a0SShanker Donthineni GICR_PENDBASER_RaWaWb); 23331ac19ca6SMarc Zyngier 23340968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 23350968a619SVladimir Murzin tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); 2336241a386cSMarc Zyngier 2337241a386cSMarc Zyngier if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { 2338241a386cSMarc Zyngier /* 2339241a386cSMarc Zyngier * The HW reports non-shareable, we must remove the 2340241a386cSMarc Zyngier * cacheability attributes as well. 2341241a386cSMarc Zyngier */ 2342241a386cSMarc Zyngier val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | 2343241a386cSMarc Zyngier GICR_PENDBASER_CACHEABILITY_MASK); 2344241a386cSMarc Zyngier val |= GICR_PENDBASER_nC; 23450968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 2346241a386cSMarc Zyngier } 23471ac19ca6SMarc Zyngier 23481ac19ca6SMarc Zyngier /* Enable LPIs */ 23491ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 23501ac19ca6SMarc Zyngier val |= GICR_CTLR_ENABLE_LPIS; 23511ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 23521ac19ca6SMarc Zyngier 23536479450fSHeyi Guo if (gic_rdists->has_vlpis) { 23546479450fSHeyi Guo void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 23556479450fSHeyi Guo 23566479450fSHeyi Guo /* 23576479450fSHeyi Guo * It's possible for CPU to receive VLPIs before it is 23586479450fSHeyi Guo * sheduled as a vPE, especially for the first CPU, and the 23596479450fSHeyi Guo * VLPI with INTID larger than 2^(IDbits+1) will be considered 23606479450fSHeyi Guo * as out of range and dropped by GIC. 23616479450fSHeyi Guo * So we initialize IDbits to known value to avoid VLPI drop. 23626479450fSHeyi Guo */ 23636479450fSHeyi Guo val = (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 23646479450fSHeyi Guo pr_debug("GICv4: CPU%d: Init IDbits to 0x%llx for GICR_VPROPBASER\n", 23656479450fSHeyi Guo smp_processor_id(), val); 23666479450fSHeyi Guo gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 23676479450fSHeyi Guo 23686479450fSHeyi Guo /* 23696479450fSHeyi Guo * Also clear Valid bit of GICR_VPENDBASER, in case some 23706479450fSHeyi Guo * ancient programming gets left in and has possibility of 23716479450fSHeyi Guo * corrupting memory. 23726479450fSHeyi Guo */ 23736479450fSHeyi Guo val = its_clear_vpend_valid(vlpi_base); 23746479450fSHeyi Guo WARN_ON(val & GICR_VPENDBASER_Dirty); 23756479450fSHeyi Guo } 23766479450fSHeyi Guo 23771ac19ca6SMarc Zyngier /* Make sure the GIC has seen the above */ 23781ac19ca6SMarc Zyngier dsb(sy); 2379c440a9d9SMarc Zyngier out: 238011e37d35SMarc Zyngier gic_data_rdist()->lpi_enabled = true; 2381c440a9d9SMarc Zyngier pr_info("GICv3: CPU%d: using %s LPI pending table @%pa\n", 238211e37d35SMarc Zyngier smp_processor_id(), 2383c440a9d9SMarc Zyngier gic_data_rdist()->pend_page ? "allocated" : "reserved", 238411e37d35SMarc Zyngier &paddr); 23851ac19ca6SMarc Zyngier } 23861ac19ca6SMarc Zyngier 2387920181ceSDerek Basehore static void its_cpu_init_collection(struct its_node *its) 23881ac19ca6SMarc Zyngier { 2389920181ceSDerek Basehore int cpu = smp_processor_id(); 23901ac19ca6SMarc Zyngier u64 target; 23911ac19ca6SMarc Zyngier 2392fbf8f40eSGanapatrao Kulkarni /* avoid cross node collections and its mapping */ 2393fbf8f40eSGanapatrao Kulkarni if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 2394fbf8f40eSGanapatrao Kulkarni struct device_node *cpu_node; 2395fbf8f40eSGanapatrao Kulkarni 2396fbf8f40eSGanapatrao Kulkarni cpu_node = of_get_cpu_node(cpu, NULL); 2397fbf8f40eSGanapatrao Kulkarni if (its->numa_node != NUMA_NO_NODE && 2398fbf8f40eSGanapatrao Kulkarni its->numa_node != of_node_to_nid(cpu_node)) 2399920181ceSDerek Basehore return; 2400fbf8f40eSGanapatrao Kulkarni } 2401fbf8f40eSGanapatrao Kulkarni 24021ac19ca6SMarc Zyngier /* 24031ac19ca6SMarc Zyngier * We now have to bind each collection to its target 24041ac19ca6SMarc Zyngier * redistributor. 24051ac19ca6SMarc Zyngier */ 2406589ce5f4SMarc Zyngier if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { 24071ac19ca6SMarc Zyngier /* 24081ac19ca6SMarc Zyngier * This ITS wants the physical address of the 24091ac19ca6SMarc Zyngier * redistributor. 24101ac19ca6SMarc Zyngier */ 24111ac19ca6SMarc Zyngier target = gic_data_rdist()->phys_base; 24121ac19ca6SMarc Zyngier } else { 2413920181ceSDerek Basehore /* This ITS wants a linear CPU number. */ 2414589ce5f4SMarc Zyngier target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 2415263fcd31SMarc Zyngier target = GICR_TYPER_CPU_NUMBER(target) << 16; 24161ac19ca6SMarc Zyngier } 24171ac19ca6SMarc Zyngier 24181ac19ca6SMarc Zyngier /* Perform collection mapping */ 24191ac19ca6SMarc Zyngier its->collections[cpu].target_address = target; 24201ac19ca6SMarc Zyngier its->collections[cpu].col_id = cpu; 24211ac19ca6SMarc Zyngier 24221ac19ca6SMarc Zyngier its_send_mapc(its, &its->collections[cpu], 1); 24231ac19ca6SMarc Zyngier its_send_invall(its, &its->collections[cpu]); 24241ac19ca6SMarc Zyngier } 24251ac19ca6SMarc Zyngier 2426920181ceSDerek Basehore static void its_cpu_init_collections(void) 2427920181ceSDerek Basehore { 2428920181ceSDerek Basehore struct its_node *its; 2429920181ceSDerek Basehore 2430a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 2431920181ceSDerek Basehore 2432920181ceSDerek Basehore list_for_each_entry(its, &its_nodes, entry) 2433920181ceSDerek Basehore its_cpu_init_collection(its); 2434920181ceSDerek Basehore 2435a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 24361ac19ca6SMarc Zyngier } 243784a6a2e7SMarc Zyngier 243884a6a2e7SMarc Zyngier static struct its_device *its_find_device(struct its_node *its, u32 dev_id) 243984a6a2e7SMarc Zyngier { 244084a6a2e7SMarc Zyngier struct its_device *its_dev = NULL, *tmp; 24413e39e8f5SMarc Zyngier unsigned long flags; 244284a6a2e7SMarc Zyngier 24433e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 244484a6a2e7SMarc Zyngier 244584a6a2e7SMarc Zyngier list_for_each_entry(tmp, &its->its_device_list, entry) { 244684a6a2e7SMarc Zyngier if (tmp->device_id == dev_id) { 244784a6a2e7SMarc Zyngier its_dev = tmp; 244884a6a2e7SMarc Zyngier break; 244984a6a2e7SMarc Zyngier } 245084a6a2e7SMarc Zyngier } 245184a6a2e7SMarc Zyngier 24523e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 245384a6a2e7SMarc Zyngier 245484a6a2e7SMarc Zyngier return its_dev; 245584a6a2e7SMarc Zyngier } 245684a6a2e7SMarc Zyngier 2457466b7d16SShanker Donthineni static struct its_baser *its_get_baser(struct its_node *its, u32 type) 2458466b7d16SShanker Donthineni { 2459466b7d16SShanker Donthineni int i; 2460466b7d16SShanker Donthineni 2461466b7d16SShanker Donthineni for (i = 0; i < GITS_BASER_NR_REGS; i++) { 2462466b7d16SShanker Donthineni if (GITS_BASER_TYPE(its->tables[i].val) == type) 2463466b7d16SShanker Donthineni return &its->tables[i]; 2464466b7d16SShanker Donthineni } 2465466b7d16SShanker Donthineni 2466466b7d16SShanker Donthineni return NULL; 2467466b7d16SShanker Donthineni } 2468466b7d16SShanker Donthineni 2469539d3782SShanker Donthineni static bool its_alloc_table_entry(struct its_node *its, 2470539d3782SShanker Donthineni struct its_baser *baser, u32 id) 24713faf24eaSShanker Donthineni { 24723faf24eaSShanker Donthineni struct page *page; 24733faf24eaSShanker Donthineni u32 esz, idx; 24743faf24eaSShanker Donthineni __le64 *table; 24753faf24eaSShanker Donthineni 24763faf24eaSShanker Donthineni /* Don't allow device id that exceeds single, flat table limit */ 24773faf24eaSShanker Donthineni esz = GITS_BASER_ENTRY_SIZE(baser->val); 24783faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_INDIRECT)) 247970cc81edSMarc Zyngier return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); 24803faf24eaSShanker Donthineni 24813faf24eaSShanker Donthineni /* Compute 1st level table index & check if that exceeds table limit */ 248270cc81edSMarc Zyngier idx = id >> ilog2(baser->psz / esz); 24833faf24eaSShanker Donthineni if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) 24843faf24eaSShanker Donthineni return false; 24853faf24eaSShanker Donthineni 24863faf24eaSShanker Donthineni table = baser->base; 24873faf24eaSShanker Donthineni 24883faf24eaSShanker Donthineni /* Allocate memory for 2nd level table */ 24893faf24eaSShanker Donthineni if (!table[idx]) { 2490539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, 2491539d3782SShanker Donthineni get_order(baser->psz)); 24923faf24eaSShanker Donthineni if (!page) 24933faf24eaSShanker Donthineni return false; 24943faf24eaSShanker Donthineni 24953faf24eaSShanker Donthineni /* Flush Lvl2 table to PoC if hw doesn't support coherency */ 24963faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 2497328191c0SVladimir Murzin gic_flush_dcache_to_poc(page_address(page), baser->psz); 24983faf24eaSShanker Donthineni 24993faf24eaSShanker Donthineni table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); 25003faf24eaSShanker Donthineni 25013faf24eaSShanker Donthineni /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ 25023faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 2503328191c0SVladimir Murzin gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); 25043faf24eaSShanker Donthineni 25053faf24eaSShanker Donthineni /* Ensure updated table contents are visible to ITS hardware */ 25063faf24eaSShanker Donthineni dsb(sy); 25073faf24eaSShanker Donthineni } 25083faf24eaSShanker Donthineni 25093faf24eaSShanker Donthineni return true; 25103faf24eaSShanker Donthineni } 25113faf24eaSShanker Donthineni 251270cc81edSMarc Zyngier static bool its_alloc_device_table(struct its_node *its, u32 dev_id) 251370cc81edSMarc Zyngier { 251470cc81edSMarc Zyngier struct its_baser *baser; 251570cc81edSMarc Zyngier 251670cc81edSMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); 251770cc81edSMarc Zyngier 251870cc81edSMarc Zyngier /* Don't allow device id that exceeds ITS hardware limit */ 251970cc81edSMarc Zyngier if (!baser) 2520576a8342SMarc Zyngier return (ilog2(dev_id) < device_ids(its)); 252170cc81edSMarc Zyngier 2522539d3782SShanker Donthineni return its_alloc_table_entry(its, baser, dev_id); 252370cc81edSMarc Zyngier } 252470cc81edSMarc Zyngier 25257d75bbb4SMarc Zyngier static bool its_alloc_vpe_table(u32 vpe_id) 25267d75bbb4SMarc Zyngier { 25277d75bbb4SMarc Zyngier struct its_node *its; 25287d75bbb4SMarc Zyngier 25297d75bbb4SMarc Zyngier /* 25307d75bbb4SMarc Zyngier * Make sure the L2 tables are allocated on *all* v4 ITSs. We 25317d75bbb4SMarc Zyngier * could try and only do it on ITSs corresponding to devices 25327d75bbb4SMarc Zyngier * that have interrupts targeted at this VPE, but the 25337d75bbb4SMarc Zyngier * complexity becomes crazy (and you have tons of memory 25347d75bbb4SMarc Zyngier * anyway, right?). 25357d75bbb4SMarc Zyngier */ 25367d75bbb4SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 25377d75bbb4SMarc Zyngier struct its_baser *baser; 25387d75bbb4SMarc Zyngier 25390dd57fedSMarc Zyngier if (!is_v4(its)) 25407d75bbb4SMarc Zyngier continue; 25417d75bbb4SMarc Zyngier 25427d75bbb4SMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); 25437d75bbb4SMarc Zyngier if (!baser) 25447d75bbb4SMarc Zyngier return false; 25457d75bbb4SMarc Zyngier 2546539d3782SShanker Donthineni if (!its_alloc_table_entry(its, baser, vpe_id)) 25477d75bbb4SMarc Zyngier return false; 25487d75bbb4SMarc Zyngier } 25497d75bbb4SMarc Zyngier 25507d75bbb4SMarc Zyngier return true; 25517d75bbb4SMarc Zyngier } 25527d75bbb4SMarc Zyngier 255384a6a2e7SMarc Zyngier static struct its_device *its_create_device(struct its_node *its, u32 dev_id, 255493f94ea0SMarc Zyngier int nvecs, bool alloc_lpis) 255584a6a2e7SMarc Zyngier { 255684a6a2e7SMarc Zyngier struct its_device *dev; 255793f94ea0SMarc Zyngier unsigned long *lpi_map = NULL; 25583e39e8f5SMarc Zyngier unsigned long flags; 2559591e5becSMarc Zyngier u16 *col_map = NULL; 256084a6a2e7SMarc Zyngier void *itt; 256184a6a2e7SMarc Zyngier int lpi_base; 256284a6a2e7SMarc Zyngier int nr_lpis; 2563c8481267SMarc Zyngier int nr_ites; 256484a6a2e7SMarc Zyngier int sz; 256584a6a2e7SMarc Zyngier 25663faf24eaSShanker Donthineni if (!its_alloc_device_table(its, dev_id)) 2567466b7d16SShanker Donthineni return NULL; 2568466b7d16SShanker Donthineni 2569147c8f37SMarc Zyngier if (WARN_ON(!is_power_of_2(nvecs))) 2570147c8f37SMarc Zyngier nvecs = roundup_pow_of_two(nvecs); 2571147c8f37SMarc Zyngier 257284a6a2e7SMarc Zyngier dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2573c8481267SMarc Zyngier /* 2574147c8f37SMarc Zyngier * Even if the device wants a single LPI, the ITT must be 2575147c8f37SMarc Zyngier * sized as a power of two (and you need at least one bit...). 2576c8481267SMarc Zyngier */ 2577147c8f37SMarc Zyngier nr_ites = max(2, nvecs); 2578ffedbf0cSMarc Zyngier sz = nr_ites * (FIELD_GET(GITS_TYPER_ITT_ENTRY_SIZE, its->typer) + 1); 257984a6a2e7SMarc Zyngier sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; 2580539d3782SShanker Donthineni itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node); 258193f94ea0SMarc Zyngier if (alloc_lpis) { 258238dd7c49SMarc Zyngier lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis); 2583591e5becSMarc Zyngier if (lpi_map) 25846396bb22SKees Cook col_map = kcalloc(nr_lpis, sizeof(*col_map), 258593f94ea0SMarc Zyngier GFP_KERNEL); 258693f94ea0SMarc Zyngier } else { 25876396bb22SKees Cook col_map = kcalloc(nr_ites, sizeof(*col_map), GFP_KERNEL); 258893f94ea0SMarc Zyngier nr_lpis = 0; 258993f94ea0SMarc Zyngier lpi_base = 0; 259093f94ea0SMarc Zyngier } 259184a6a2e7SMarc Zyngier 259293f94ea0SMarc Zyngier if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { 259384a6a2e7SMarc Zyngier kfree(dev); 259484a6a2e7SMarc Zyngier kfree(itt); 259584a6a2e7SMarc Zyngier kfree(lpi_map); 2596591e5becSMarc Zyngier kfree(col_map); 259784a6a2e7SMarc Zyngier return NULL; 259884a6a2e7SMarc Zyngier } 259984a6a2e7SMarc Zyngier 2600328191c0SVladimir Murzin gic_flush_dcache_to_poc(itt, sz); 26015a9a8915SMarc Zyngier 260284a6a2e7SMarc Zyngier dev->its = its; 260384a6a2e7SMarc Zyngier dev->itt = itt; 2604c8481267SMarc Zyngier dev->nr_ites = nr_ites; 2605591e5becSMarc Zyngier dev->event_map.lpi_map = lpi_map; 2606591e5becSMarc Zyngier dev->event_map.col_map = col_map; 2607591e5becSMarc Zyngier dev->event_map.lpi_base = lpi_base; 2608591e5becSMarc Zyngier dev->event_map.nr_lpis = nr_lpis; 2609d011e4e6SMarc Zyngier mutex_init(&dev->event_map.vlpi_lock); 261084a6a2e7SMarc Zyngier dev->device_id = dev_id; 261184a6a2e7SMarc Zyngier INIT_LIST_HEAD(&dev->entry); 261284a6a2e7SMarc Zyngier 26133e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 261484a6a2e7SMarc Zyngier list_add(&dev->entry, &its->its_device_list); 26153e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 261684a6a2e7SMarc Zyngier 261784a6a2e7SMarc Zyngier /* Map device to its ITT */ 261884a6a2e7SMarc Zyngier its_send_mapd(dev, 1); 261984a6a2e7SMarc Zyngier 262084a6a2e7SMarc Zyngier return dev; 262184a6a2e7SMarc Zyngier } 262284a6a2e7SMarc Zyngier 262384a6a2e7SMarc Zyngier static void its_free_device(struct its_device *its_dev) 262484a6a2e7SMarc Zyngier { 26253e39e8f5SMarc Zyngier unsigned long flags; 26263e39e8f5SMarc Zyngier 26273e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its_dev->its->lock, flags); 262884a6a2e7SMarc Zyngier list_del(&its_dev->entry); 26293e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); 2630898aa5ceSMarc Zyngier kfree(its_dev->event_map.col_map); 263184a6a2e7SMarc Zyngier kfree(its_dev->itt); 263284a6a2e7SMarc Zyngier kfree(its_dev); 263384a6a2e7SMarc Zyngier } 2634b48ac83dSMarc Zyngier 26358208d170SMarc Zyngier static int its_alloc_device_irq(struct its_device *dev, int nvecs, irq_hw_number_t *hwirq) 2636b48ac83dSMarc Zyngier { 2637b48ac83dSMarc Zyngier int idx; 2638b48ac83dSMarc Zyngier 2639342be106SZenghui Yu /* Find a free LPI region in lpi_map and allocate them. */ 26408208d170SMarc Zyngier idx = bitmap_find_free_region(dev->event_map.lpi_map, 26418208d170SMarc Zyngier dev->event_map.nr_lpis, 26428208d170SMarc Zyngier get_count_order(nvecs)); 26438208d170SMarc Zyngier if (idx < 0) 2644b48ac83dSMarc Zyngier return -ENOSPC; 2645b48ac83dSMarc Zyngier 2646591e5becSMarc Zyngier *hwirq = dev->event_map.lpi_base + idx; 2647b48ac83dSMarc Zyngier 2648b48ac83dSMarc Zyngier return 0; 2649b48ac83dSMarc Zyngier } 2650b48ac83dSMarc Zyngier 265154456db9SMarc Zyngier static int its_msi_prepare(struct irq_domain *domain, struct device *dev, 2652b48ac83dSMarc Zyngier int nvec, msi_alloc_info_t *info) 2653b48ac83dSMarc Zyngier { 2654b48ac83dSMarc Zyngier struct its_node *its; 2655b48ac83dSMarc Zyngier struct its_device *its_dev; 265654456db9SMarc Zyngier struct msi_domain_info *msi_info; 265754456db9SMarc Zyngier u32 dev_id; 26589791ec7dSMarc Zyngier int err = 0; 2659b48ac83dSMarc Zyngier 266054456db9SMarc Zyngier /* 2661a7c90f51SJulien Grall * We ignore "dev" entirely, and rely on the dev_id that has 266254456db9SMarc Zyngier * been passed via the scratchpad. This limits this domain's 266354456db9SMarc Zyngier * usefulness to upper layers that definitely know that they 266454456db9SMarc Zyngier * are built on top of the ITS. 266554456db9SMarc Zyngier */ 266654456db9SMarc Zyngier dev_id = info->scratchpad[0].ul; 266754456db9SMarc Zyngier 266854456db9SMarc Zyngier msi_info = msi_get_domain_info(domain); 266954456db9SMarc Zyngier its = msi_info->data; 267054456db9SMarc Zyngier 267120b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi && 267220b3d54eSMarc Zyngier vpe_proxy.dev && 267320b3d54eSMarc Zyngier vpe_proxy.dev->its == its && 267420b3d54eSMarc Zyngier dev_id == vpe_proxy.dev->device_id) { 267520b3d54eSMarc Zyngier /* Bad luck. Get yourself a better implementation */ 267620b3d54eSMarc Zyngier WARN_ONCE(1, "DevId %x clashes with GICv4 VPE proxy device\n", 267720b3d54eSMarc Zyngier dev_id); 267820b3d54eSMarc Zyngier return -EINVAL; 267920b3d54eSMarc Zyngier } 268020b3d54eSMarc Zyngier 26819791ec7dSMarc Zyngier mutex_lock(&its->dev_alloc_lock); 2682f130420eSMarc Zyngier its_dev = its_find_device(its, dev_id); 2683e8137f4fSMarc Zyngier if (its_dev) { 2684e8137f4fSMarc Zyngier /* 2685e8137f4fSMarc Zyngier * We already have seen this ID, probably through 2686e8137f4fSMarc Zyngier * another alias (PCI bridge of some sort). No need to 2687e8137f4fSMarc Zyngier * create the device. 2688e8137f4fSMarc Zyngier */ 26899791ec7dSMarc Zyngier its_dev->shared = true; 2690f130420eSMarc Zyngier pr_debug("Reusing ITT for devID %x\n", dev_id); 2691e8137f4fSMarc Zyngier goto out; 2692e8137f4fSMarc Zyngier } 2693b48ac83dSMarc Zyngier 269493f94ea0SMarc Zyngier its_dev = its_create_device(its, dev_id, nvec, true); 26959791ec7dSMarc Zyngier if (!its_dev) { 26969791ec7dSMarc Zyngier err = -ENOMEM; 26979791ec7dSMarc Zyngier goto out; 26989791ec7dSMarc Zyngier } 2699b48ac83dSMarc Zyngier 2700f130420eSMarc Zyngier pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); 2701e8137f4fSMarc Zyngier out: 27029791ec7dSMarc Zyngier mutex_unlock(&its->dev_alloc_lock); 2703b48ac83dSMarc Zyngier info->scratchpad[0].ptr = its_dev; 27049791ec7dSMarc Zyngier return err; 2705b48ac83dSMarc Zyngier } 2706b48ac83dSMarc Zyngier 270754456db9SMarc Zyngier static struct msi_domain_ops its_msi_domain_ops = { 270854456db9SMarc Zyngier .msi_prepare = its_msi_prepare, 270954456db9SMarc Zyngier }; 271054456db9SMarc Zyngier 2711b48ac83dSMarc Zyngier static int its_irq_gic_domain_alloc(struct irq_domain *domain, 2712b48ac83dSMarc Zyngier unsigned int virq, 2713b48ac83dSMarc Zyngier irq_hw_number_t hwirq) 2714b48ac83dSMarc Zyngier { 2715f833f57fSMarc Zyngier struct irq_fwspec fwspec; 2716b48ac83dSMarc Zyngier 2717f833f57fSMarc Zyngier if (irq_domain_get_of_node(domain->parent)) { 2718f833f57fSMarc Zyngier fwspec.fwnode = domain->parent->fwnode; 2719f833f57fSMarc Zyngier fwspec.param_count = 3; 2720f833f57fSMarc Zyngier fwspec.param[0] = GIC_IRQ_TYPE_LPI; 2721f833f57fSMarc Zyngier fwspec.param[1] = hwirq; 2722f833f57fSMarc Zyngier fwspec.param[2] = IRQ_TYPE_EDGE_RISING; 27233f010cf1STomasz Nowicki } else if (is_fwnode_irqchip(domain->parent->fwnode)) { 27243f010cf1STomasz Nowicki fwspec.fwnode = domain->parent->fwnode; 27253f010cf1STomasz Nowicki fwspec.param_count = 2; 27263f010cf1STomasz Nowicki fwspec.param[0] = hwirq; 27273f010cf1STomasz Nowicki fwspec.param[1] = IRQ_TYPE_EDGE_RISING; 2728f833f57fSMarc Zyngier } else { 2729f833f57fSMarc Zyngier return -EINVAL; 2730f833f57fSMarc Zyngier } 2731b48ac83dSMarc Zyngier 2732f833f57fSMarc Zyngier return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); 2733b48ac83dSMarc Zyngier } 2734b48ac83dSMarc Zyngier 2735b48ac83dSMarc Zyngier static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 2736b48ac83dSMarc Zyngier unsigned int nr_irqs, void *args) 2737b48ac83dSMarc Zyngier { 2738b48ac83dSMarc Zyngier msi_alloc_info_t *info = args; 2739b48ac83dSMarc Zyngier struct its_device *its_dev = info->scratchpad[0].ptr; 274035ae7df2SJulien Grall struct its_node *its = its_dev->its; 2741b48ac83dSMarc Zyngier irq_hw_number_t hwirq; 2742b48ac83dSMarc Zyngier int err; 2743b48ac83dSMarc Zyngier int i; 2744b48ac83dSMarc Zyngier 27458208d170SMarc Zyngier err = its_alloc_device_irq(its_dev, nr_irqs, &hwirq); 2746b48ac83dSMarc Zyngier if (err) 2747b48ac83dSMarc Zyngier return err; 2748b48ac83dSMarc Zyngier 274935ae7df2SJulien Grall err = iommu_dma_prepare_msi(info->desc, its->get_msi_base(its_dev)); 275035ae7df2SJulien Grall if (err) 275135ae7df2SJulien Grall return err; 275235ae7df2SJulien Grall 27538208d170SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 27548208d170SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, hwirq + i); 2755b48ac83dSMarc Zyngier if (err) 2756b48ac83dSMarc Zyngier return err; 2757b48ac83dSMarc Zyngier 2758b48ac83dSMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, 27598208d170SMarc Zyngier hwirq + i, &its_irq_chip, its_dev); 27600d224d35SMarc Zyngier irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq + i))); 2761f130420eSMarc Zyngier pr_debug("ID:%d pID:%d vID:%d\n", 27628208d170SMarc Zyngier (int)(hwirq + i - its_dev->event_map.lpi_base), 27638208d170SMarc Zyngier (int)(hwirq + i), virq + i); 2764b48ac83dSMarc Zyngier } 2765b48ac83dSMarc Zyngier 2766b48ac83dSMarc Zyngier return 0; 2767b48ac83dSMarc Zyngier } 2768b48ac83dSMarc Zyngier 276972491643SThomas Gleixner static int its_irq_domain_activate(struct irq_domain *domain, 2770702cb0a0SThomas Gleixner struct irq_data *d, bool reserve) 2771aca268dfSMarc Zyngier { 2772aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2773aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2774fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 27750d224d35SMarc Zyngier int cpu; 2776fbf8f40eSGanapatrao Kulkarni 2777fbf8f40eSGanapatrao Kulkarni /* get the cpu_mask of local node */ 2778fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) 2779fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 2780aca268dfSMarc Zyngier 2781591e5becSMarc Zyngier /* Bind the LPI to the first possible CPU */ 2782c1797b11SYang Yingliang cpu = cpumask_first_and(cpu_mask, cpu_online_mask); 2783c1797b11SYang Yingliang if (cpu >= nr_cpu_ids) { 2784c1797b11SYang Yingliang if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) 2785c1797b11SYang Yingliang return -EINVAL; 2786c1797b11SYang Yingliang 2787c1797b11SYang Yingliang cpu = cpumask_first(cpu_online_mask); 2788c1797b11SYang Yingliang } 2789c1797b11SYang Yingliang 27900d224d35SMarc Zyngier its_dev->event_map.col_map[event] = cpu; 27910d224d35SMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 2792591e5becSMarc Zyngier 2793aca268dfSMarc Zyngier /* Map the GIC IRQ and event to the device */ 27946a25ad3aSMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 279572491643SThomas Gleixner return 0; 2796aca268dfSMarc Zyngier } 2797aca268dfSMarc Zyngier 2798aca268dfSMarc Zyngier static void its_irq_domain_deactivate(struct irq_domain *domain, 2799aca268dfSMarc Zyngier struct irq_data *d) 2800aca268dfSMarc Zyngier { 2801aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2802aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2803aca268dfSMarc Zyngier 2804aca268dfSMarc Zyngier /* Stop the delivery of interrupts */ 2805aca268dfSMarc Zyngier its_send_discard(its_dev, event); 2806aca268dfSMarc Zyngier } 2807aca268dfSMarc Zyngier 2808b48ac83dSMarc Zyngier static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, 2809b48ac83dSMarc Zyngier unsigned int nr_irqs) 2810b48ac83dSMarc Zyngier { 2811b48ac83dSMarc Zyngier struct irq_data *d = irq_domain_get_irq_data(domain, virq); 2812b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 28139791ec7dSMarc Zyngier struct its_node *its = its_dev->its; 2814b48ac83dSMarc Zyngier int i; 2815b48ac83dSMarc Zyngier 2816c9c96e30SMarc Zyngier bitmap_release_region(its_dev->event_map.lpi_map, 2817c9c96e30SMarc Zyngier its_get_event_id(irq_domain_get_irq_data(domain, virq)), 2818c9c96e30SMarc Zyngier get_count_order(nr_irqs)); 2819c9c96e30SMarc Zyngier 2820b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 2821b48ac83dSMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 2822b48ac83dSMarc Zyngier virq + i); 2823b48ac83dSMarc Zyngier /* Nuke the entry in the domain */ 28242da39949SMarc Zyngier irq_domain_reset_irq_data(data); 2825b48ac83dSMarc Zyngier } 2826b48ac83dSMarc Zyngier 28279791ec7dSMarc Zyngier mutex_lock(&its->dev_alloc_lock); 28289791ec7dSMarc Zyngier 28299791ec7dSMarc Zyngier /* 28309791ec7dSMarc Zyngier * If all interrupts have been freed, start mopping the 28319791ec7dSMarc Zyngier * floor. This is conditionned on the device not being shared. 28329791ec7dSMarc Zyngier */ 28339791ec7dSMarc Zyngier if (!its_dev->shared && 28349791ec7dSMarc Zyngier bitmap_empty(its_dev->event_map.lpi_map, 2835591e5becSMarc Zyngier its_dev->event_map.nr_lpis)) { 283638dd7c49SMarc Zyngier its_lpi_free(its_dev->event_map.lpi_map, 2837cf2be8baSMarc Zyngier its_dev->event_map.lpi_base, 2838cf2be8baSMarc Zyngier its_dev->event_map.nr_lpis); 2839b48ac83dSMarc Zyngier 2840b48ac83dSMarc Zyngier /* Unmap device/itt */ 2841b48ac83dSMarc Zyngier its_send_mapd(its_dev, 0); 2842b48ac83dSMarc Zyngier its_free_device(its_dev); 2843b48ac83dSMarc Zyngier } 2844b48ac83dSMarc Zyngier 28459791ec7dSMarc Zyngier mutex_unlock(&its->dev_alloc_lock); 28469791ec7dSMarc Zyngier 2847b48ac83dSMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 2848b48ac83dSMarc Zyngier } 2849b48ac83dSMarc Zyngier 2850b48ac83dSMarc Zyngier static const struct irq_domain_ops its_domain_ops = { 2851b48ac83dSMarc Zyngier .alloc = its_irq_domain_alloc, 2852b48ac83dSMarc Zyngier .free = its_irq_domain_free, 2853aca268dfSMarc Zyngier .activate = its_irq_domain_activate, 2854aca268dfSMarc Zyngier .deactivate = its_irq_domain_deactivate, 2855b48ac83dSMarc Zyngier }; 28564c21f3c2SMarc Zyngier 285720b3d54eSMarc Zyngier /* 285820b3d54eSMarc Zyngier * This is insane. 285920b3d54eSMarc Zyngier * 286020b3d54eSMarc Zyngier * If a GICv4 doesn't implement Direct LPIs (which is extremely 286120b3d54eSMarc Zyngier * likely), the only way to perform an invalidate is to use a fake 286220b3d54eSMarc Zyngier * device to issue an INV command, implying that the LPI has first 286320b3d54eSMarc Zyngier * been mapped to some event on that device. Since this is not exactly 286420b3d54eSMarc Zyngier * cheap, we try to keep that mapping around as long as possible, and 286520b3d54eSMarc Zyngier * only issue an UNMAP if we're short on available slots. 286620b3d54eSMarc Zyngier * 286720b3d54eSMarc Zyngier * Broken by design(tm). 286820b3d54eSMarc Zyngier */ 286920b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap_locked(struct its_vpe *vpe) 287020b3d54eSMarc Zyngier { 287120b3d54eSMarc Zyngier /* Already unmapped? */ 287220b3d54eSMarc Zyngier if (vpe->vpe_proxy_event == -1) 287320b3d54eSMarc Zyngier return; 287420b3d54eSMarc Zyngier 287520b3d54eSMarc Zyngier its_send_discard(vpe_proxy.dev, vpe->vpe_proxy_event); 287620b3d54eSMarc Zyngier vpe_proxy.vpes[vpe->vpe_proxy_event] = NULL; 287720b3d54eSMarc Zyngier 287820b3d54eSMarc Zyngier /* 287920b3d54eSMarc Zyngier * We don't track empty slots at all, so let's move the 288020b3d54eSMarc Zyngier * next_victim pointer if we can quickly reuse that slot 288120b3d54eSMarc Zyngier * instead of nuking an existing entry. Not clear that this is 288220b3d54eSMarc Zyngier * always a win though, and this might just generate a ripple 288320b3d54eSMarc Zyngier * effect... Let's just hope VPEs don't migrate too often. 288420b3d54eSMarc Zyngier */ 288520b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 288620b3d54eSMarc Zyngier vpe_proxy.next_victim = vpe->vpe_proxy_event; 288720b3d54eSMarc Zyngier 288820b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 288920b3d54eSMarc Zyngier } 289020b3d54eSMarc Zyngier 289120b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap(struct its_vpe *vpe) 289220b3d54eSMarc Zyngier { 289320b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi) { 289420b3d54eSMarc Zyngier unsigned long flags; 289520b3d54eSMarc Zyngier 289620b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 289720b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe); 289820b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 289920b3d54eSMarc Zyngier } 290020b3d54eSMarc Zyngier } 290120b3d54eSMarc Zyngier 290220b3d54eSMarc Zyngier static void its_vpe_db_proxy_map_locked(struct its_vpe *vpe) 290320b3d54eSMarc Zyngier { 290420b3d54eSMarc Zyngier /* Already mapped? */ 290520b3d54eSMarc Zyngier if (vpe->vpe_proxy_event != -1) 290620b3d54eSMarc Zyngier return; 290720b3d54eSMarc Zyngier 290820b3d54eSMarc Zyngier /* This slot was already allocated. Kick the other VPE out. */ 290920b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 291020b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe_proxy.vpes[vpe_proxy.next_victim]); 291120b3d54eSMarc Zyngier 291220b3d54eSMarc Zyngier /* Map the new VPE instead */ 291320b3d54eSMarc Zyngier vpe_proxy.vpes[vpe_proxy.next_victim] = vpe; 291420b3d54eSMarc Zyngier vpe->vpe_proxy_event = vpe_proxy.next_victim; 291520b3d54eSMarc Zyngier vpe_proxy.next_victim = (vpe_proxy.next_victim + 1) % vpe_proxy.dev->nr_ites; 291620b3d54eSMarc Zyngier 291720b3d54eSMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = vpe->col_idx; 291820b3d54eSMarc Zyngier its_send_mapti(vpe_proxy.dev, vpe->vpe_db_lpi, vpe->vpe_proxy_event); 291920b3d54eSMarc Zyngier } 292020b3d54eSMarc Zyngier 2921958b90d1SMarc Zyngier static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) 2922958b90d1SMarc Zyngier { 2923958b90d1SMarc Zyngier unsigned long flags; 2924958b90d1SMarc Zyngier struct its_collection *target_col; 2925958b90d1SMarc Zyngier 2926958b90d1SMarc Zyngier if (gic_rdists->has_direct_lpi) { 2927958b90d1SMarc Zyngier void __iomem *rdbase; 2928958b90d1SMarc Zyngier 2929958b90d1SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; 2930958b90d1SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); 29312f4f064bSMarc Zyngier wait_for_syncr(rdbase); 2932958b90d1SMarc Zyngier 2933958b90d1SMarc Zyngier return; 2934958b90d1SMarc Zyngier } 2935958b90d1SMarc Zyngier 2936958b90d1SMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 2937958b90d1SMarc Zyngier 2938958b90d1SMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 2939958b90d1SMarc Zyngier 2940958b90d1SMarc Zyngier target_col = &vpe_proxy.dev->its->collections[to]; 2941958b90d1SMarc Zyngier its_send_movi(vpe_proxy.dev, target_col, vpe->vpe_proxy_event); 2942958b90d1SMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = to; 2943958b90d1SMarc Zyngier 2944958b90d1SMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 2945958b90d1SMarc Zyngier } 2946958b90d1SMarc Zyngier 29473171a47aSMarc Zyngier static int its_vpe_set_affinity(struct irq_data *d, 29483171a47aSMarc Zyngier const struct cpumask *mask_val, 29493171a47aSMarc Zyngier bool force) 29503171a47aSMarc Zyngier { 29513171a47aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 29523171a47aSMarc Zyngier int cpu = cpumask_first(mask_val); 29533171a47aSMarc Zyngier 29543171a47aSMarc Zyngier /* 29553171a47aSMarc Zyngier * Changing affinity is mega expensive, so let's be as lazy as 295620b3d54eSMarc Zyngier * we can and only do it if we really have to. Also, if mapped 2957958b90d1SMarc Zyngier * into the proxy device, we need to move the doorbell 2958958b90d1SMarc Zyngier * interrupt to its new location. 29593171a47aSMarc Zyngier */ 29603171a47aSMarc Zyngier if (vpe->col_idx != cpu) { 2961958b90d1SMarc Zyngier int from = vpe->col_idx; 2962958b90d1SMarc Zyngier 29633171a47aSMarc Zyngier vpe->col_idx = cpu; 29643171a47aSMarc Zyngier its_send_vmovp(vpe); 2965958b90d1SMarc Zyngier its_vpe_db_proxy_move(vpe, from, cpu); 29663171a47aSMarc Zyngier } 29673171a47aSMarc Zyngier 296844c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(cpu)); 296944c4c25eSMarc Zyngier 29703171a47aSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 29713171a47aSMarc Zyngier } 29723171a47aSMarc Zyngier 2973e643d803SMarc Zyngier static void its_vpe_schedule(struct its_vpe *vpe) 2974e643d803SMarc Zyngier { 297550c33097SRobin Murphy void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 2976e643d803SMarc Zyngier u64 val; 2977e643d803SMarc Zyngier 2978e643d803SMarc Zyngier /* Schedule the VPE */ 2979e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & 2980e643d803SMarc Zyngier GENMASK_ULL(51, 12); 2981e643d803SMarc Zyngier val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 2982e643d803SMarc Zyngier val |= GICR_VPROPBASER_RaWb; 2983e643d803SMarc Zyngier val |= GICR_VPROPBASER_InnerShareable; 2984e643d803SMarc Zyngier gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 2985e643d803SMarc Zyngier 2986e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->vpt_page)) & 2987e643d803SMarc Zyngier GENMASK_ULL(51, 16); 2988e643d803SMarc Zyngier val |= GICR_VPENDBASER_RaWaWb; 2989e643d803SMarc Zyngier val |= GICR_VPENDBASER_NonShareable; 2990e643d803SMarc Zyngier /* 2991e643d803SMarc Zyngier * There is no good way of finding out if the pending table is 2992e643d803SMarc Zyngier * empty as we can race against the doorbell interrupt very 2993e643d803SMarc Zyngier * easily. So in the end, vpe->pending_last is only an 2994e643d803SMarc Zyngier * indication that the vcpu has something pending, not one 2995e643d803SMarc Zyngier * that the pending table is empty. A good implementation 2996e643d803SMarc Zyngier * would be able to read its coarse map pretty quickly anyway, 2997e643d803SMarc Zyngier * making this a tolerable issue. 2998e643d803SMarc Zyngier */ 2999e643d803SMarc Zyngier val |= GICR_VPENDBASER_PendingLast; 3000e643d803SMarc Zyngier val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; 3001e643d803SMarc Zyngier val |= GICR_VPENDBASER_Valid; 3002e643d803SMarc Zyngier gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 3003e643d803SMarc Zyngier } 3004e643d803SMarc Zyngier 3005e643d803SMarc Zyngier static void its_vpe_deschedule(struct its_vpe *vpe) 3006e643d803SMarc Zyngier { 300750c33097SRobin Murphy void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); 3008e643d803SMarc Zyngier u64 val; 3009e643d803SMarc Zyngier 30106479450fSHeyi Guo val = its_clear_vpend_valid(vlpi_base); 3011e643d803SMarc Zyngier 30126479450fSHeyi Guo if (unlikely(val & GICR_VPENDBASER_Dirty)) { 3013e643d803SMarc Zyngier pr_err_ratelimited("ITS virtual pending table not cleaning\n"); 3014e643d803SMarc Zyngier vpe->idai = false; 3015e643d803SMarc Zyngier vpe->pending_last = true; 3016e643d803SMarc Zyngier } else { 3017e643d803SMarc Zyngier vpe->idai = !!(val & GICR_VPENDBASER_IDAI); 3018e643d803SMarc Zyngier vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); 3019e643d803SMarc Zyngier } 3020e643d803SMarc Zyngier } 3021e643d803SMarc Zyngier 302240619a2eSMarc Zyngier static void its_vpe_invall(struct its_vpe *vpe) 302340619a2eSMarc Zyngier { 302440619a2eSMarc Zyngier struct its_node *its; 302540619a2eSMarc Zyngier 302640619a2eSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 30270dd57fedSMarc Zyngier if (!is_v4(its)) 302840619a2eSMarc Zyngier continue; 302940619a2eSMarc Zyngier 30302247e1bfSMarc Zyngier if (its_list_map && !vpe->its_vm->vlpi_count[its->list_nr]) 30312247e1bfSMarc Zyngier continue; 30322247e1bfSMarc Zyngier 30333c1cceebSMarc Zyngier /* 30343c1cceebSMarc Zyngier * Sending a VINVALL to a single ITS is enough, as all 30353c1cceebSMarc Zyngier * we need is to reach the redistributors. 30363c1cceebSMarc Zyngier */ 303740619a2eSMarc Zyngier its_send_vinvall(its, vpe); 30383c1cceebSMarc Zyngier return; 303940619a2eSMarc Zyngier } 304040619a2eSMarc Zyngier } 304140619a2eSMarc Zyngier 3042e643d803SMarc Zyngier static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 3043e643d803SMarc Zyngier { 3044e643d803SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 3045e643d803SMarc Zyngier struct its_cmd_info *info = vcpu_info; 3046e643d803SMarc Zyngier 3047e643d803SMarc Zyngier switch (info->cmd_type) { 3048e643d803SMarc Zyngier case SCHEDULE_VPE: 3049e643d803SMarc Zyngier its_vpe_schedule(vpe); 3050e643d803SMarc Zyngier return 0; 3051e643d803SMarc Zyngier 3052e643d803SMarc Zyngier case DESCHEDULE_VPE: 3053e643d803SMarc Zyngier its_vpe_deschedule(vpe); 3054e643d803SMarc Zyngier return 0; 3055e643d803SMarc Zyngier 30565e2f7642SMarc Zyngier case INVALL_VPE: 305740619a2eSMarc Zyngier its_vpe_invall(vpe); 30585e2f7642SMarc Zyngier return 0; 30595e2f7642SMarc Zyngier 3060e643d803SMarc Zyngier default: 3061e643d803SMarc Zyngier return -EINVAL; 3062e643d803SMarc Zyngier } 3063e643d803SMarc Zyngier } 3064e643d803SMarc Zyngier 306520b3d54eSMarc Zyngier static void its_vpe_send_cmd(struct its_vpe *vpe, 306620b3d54eSMarc Zyngier void (*cmd)(struct its_device *, u32)) 306720b3d54eSMarc Zyngier { 306820b3d54eSMarc Zyngier unsigned long flags; 306920b3d54eSMarc Zyngier 307020b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 307120b3d54eSMarc Zyngier 307220b3d54eSMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 307320b3d54eSMarc Zyngier cmd(vpe_proxy.dev, vpe->vpe_proxy_event); 307420b3d54eSMarc Zyngier 307520b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 307620b3d54eSMarc Zyngier } 307720b3d54eSMarc Zyngier 3078f6a91da7SMarc Zyngier static void its_vpe_send_inv(struct irq_data *d) 3079f6a91da7SMarc Zyngier { 3080f6a91da7SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 308120b3d54eSMarc Zyngier 308220b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 3083f6a91da7SMarc Zyngier void __iomem *rdbase; 3084f6a91da7SMarc Zyngier 3085425c09beSMarc Zyngier /* Target the redistributor this VPE is currently known on */ 3086f6a91da7SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 3087425c09beSMarc Zyngier gic_write_lpir(d->parent_data->hwirq, rdbase + GICR_INVLPIR); 30882f4f064bSMarc Zyngier wait_for_syncr(rdbase); 308920b3d54eSMarc Zyngier } else { 309020b3d54eSMarc Zyngier its_vpe_send_cmd(vpe, its_send_inv); 309120b3d54eSMarc Zyngier } 3092f6a91da7SMarc Zyngier } 3093f6a91da7SMarc Zyngier 3094f6a91da7SMarc Zyngier static void its_vpe_mask_irq(struct irq_data *d) 3095f6a91da7SMarc Zyngier { 3096f6a91da7SMarc Zyngier /* 3097f6a91da7SMarc Zyngier * We need to unmask the LPI, which is described by the parent 3098f6a91da7SMarc Zyngier * irq_data. Instead of calling into the parent (which won't 3099f6a91da7SMarc Zyngier * exactly do the right thing, let's simply use the 3100f6a91da7SMarc Zyngier * parent_data pointer. Yes, I'm naughty. 3101f6a91da7SMarc Zyngier */ 3102f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); 3103f6a91da7SMarc Zyngier its_vpe_send_inv(d); 3104f6a91da7SMarc Zyngier } 3105f6a91da7SMarc Zyngier 3106f6a91da7SMarc Zyngier static void its_vpe_unmask_irq(struct irq_data *d) 3107f6a91da7SMarc Zyngier { 3108f6a91da7SMarc Zyngier /* Same hack as above... */ 3109f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); 3110f6a91da7SMarc Zyngier its_vpe_send_inv(d); 3111f6a91da7SMarc Zyngier } 3112f6a91da7SMarc Zyngier 3113e57a3e28SMarc Zyngier static int its_vpe_set_irqchip_state(struct irq_data *d, 3114e57a3e28SMarc Zyngier enum irqchip_irq_state which, 3115e57a3e28SMarc Zyngier bool state) 3116e57a3e28SMarc Zyngier { 3117e57a3e28SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 3118e57a3e28SMarc Zyngier 3119e57a3e28SMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 3120e57a3e28SMarc Zyngier return -EINVAL; 3121e57a3e28SMarc Zyngier 3122e57a3e28SMarc Zyngier if (gic_rdists->has_direct_lpi) { 3123e57a3e28SMarc Zyngier void __iomem *rdbase; 3124e57a3e28SMarc Zyngier 3125e57a3e28SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 3126e57a3e28SMarc Zyngier if (state) { 3127e57a3e28SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); 3128e57a3e28SMarc Zyngier } else { 3129e57a3e28SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); 31302f4f064bSMarc Zyngier wait_for_syncr(rdbase); 3131e57a3e28SMarc Zyngier } 3132e57a3e28SMarc Zyngier } else { 3133e57a3e28SMarc Zyngier if (state) 3134e57a3e28SMarc Zyngier its_vpe_send_cmd(vpe, its_send_int); 3135e57a3e28SMarc Zyngier else 3136e57a3e28SMarc Zyngier its_vpe_send_cmd(vpe, its_send_clear); 3137e57a3e28SMarc Zyngier } 3138e57a3e28SMarc Zyngier 3139e57a3e28SMarc Zyngier return 0; 3140e57a3e28SMarc Zyngier } 3141e57a3e28SMarc Zyngier 31428fff27aeSMarc Zyngier static struct irq_chip its_vpe_irq_chip = { 31438fff27aeSMarc Zyngier .name = "GICv4-vpe", 3144f6a91da7SMarc Zyngier .irq_mask = its_vpe_mask_irq, 3145f6a91da7SMarc Zyngier .irq_unmask = its_vpe_unmask_irq, 3146f6a91da7SMarc Zyngier .irq_eoi = irq_chip_eoi_parent, 31473171a47aSMarc Zyngier .irq_set_affinity = its_vpe_set_affinity, 3148e57a3e28SMarc Zyngier .irq_set_irqchip_state = its_vpe_set_irqchip_state, 3149e643d803SMarc Zyngier .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, 31508fff27aeSMarc Zyngier }; 31518fff27aeSMarc Zyngier 31527d75bbb4SMarc Zyngier static int its_vpe_id_alloc(void) 31537d75bbb4SMarc Zyngier { 315432bd44dcSShanker Donthineni return ida_simple_get(&its_vpeid_ida, 0, ITS_MAX_VPEID, GFP_KERNEL); 31557d75bbb4SMarc Zyngier } 31567d75bbb4SMarc Zyngier 31577d75bbb4SMarc Zyngier static void its_vpe_id_free(u16 id) 31587d75bbb4SMarc Zyngier { 31597d75bbb4SMarc Zyngier ida_simple_remove(&its_vpeid_ida, id); 31607d75bbb4SMarc Zyngier } 31617d75bbb4SMarc Zyngier 31627d75bbb4SMarc Zyngier static int its_vpe_init(struct its_vpe *vpe) 31637d75bbb4SMarc Zyngier { 31647d75bbb4SMarc Zyngier struct page *vpt_page; 31657d75bbb4SMarc Zyngier int vpe_id; 31667d75bbb4SMarc Zyngier 31677d75bbb4SMarc Zyngier /* Allocate vpe_id */ 31687d75bbb4SMarc Zyngier vpe_id = its_vpe_id_alloc(); 31697d75bbb4SMarc Zyngier if (vpe_id < 0) 31707d75bbb4SMarc Zyngier return vpe_id; 31717d75bbb4SMarc Zyngier 31727d75bbb4SMarc Zyngier /* Allocate VPT */ 31737d75bbb4SMarc Zyngier vpt_page = its_allocate_pending_table(GFP_KERNEL); 31747d75bbb4SMarc Zyngier if (!vpt_page) { 31757d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 31767d75bbb4SMarc Zyngier return -ENOMEM; 31777d75bbb4SMarc Zyngier } 31787d75bbb4SMarc Zyngier 31797d75bbb4SMarc Zyngier if (!its_alloc_vpe_table(vpe_id)) { 31807d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 318134f8eb92SNianyao Tang its_free_pending_table(vpt_page); 31827d75bbb4SMarc Zyngier return -ENOMEM; 31837d75bbb4SMarc Zyngier } 31847d75bbb4SMarc Zyngier 31857d75bbb4SMarc Zyngier vpe->vpe_id = vpe_id; 31867d75bbb4SMarc Zyngier vpe->vpt_page = vpt_page; 318720b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 31887d75bbb4SMarc Zyngier 31897d75bbb4SMarc Zyngier return 0; 31907d75bbb4SMarc Zyngier } 31917d75bbb4SMarc Zyngier 31927d75bbb4SMarc Zyngier static void its_vpe_teardown(struct its_vpe *vpe) 31937d75bbb4SMarc Zyngier { 319420b3d54eSMarc Zyngier its_vpe_db_proxy_unmap(vpe); 31957d75bbb4SMarc Zyngier its_vpe_id_free(vpe->vpe_id); 31967d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 31977d75bbb4SMarc Zyngier } 31987d75bbb4SMarc Zyngier 31997d75bbb4SMarc Zyngier static void its_vpe_irq_domain_free(struct irq_domain *domain, 32007d75bbb4SMarc Zyngier unsigned int virq, 32017d75bbb4SMarc Zyngier unsigned int nr_irqs) 32027d75bbb4SMarc Zyngier { 32037d75bbb4SMarc Zyngier struct its_vm *vm = domain->host_data; 32047d75bbb4SMarc Zyngier int i; 32057d75bbb4SMarc Zyngier 32067d75bbb4SMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 32077d75bbb4SMarc Zyngier 32087d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 32097d75bbb4SMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 32107d75bbb4SMarc Zyngier virq + i); 32117d75bbb4SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(data); 32127d75bbb4SMarc Zyngier 32137d75bbb4SMarc Zyngier BUG_ON(vm != vpe->its_vm); 32147d75bbb4SMarc Zyngier 32157d75bbb4SMarc Zyngier clear_bit(data->hwirq, vm->db_bitmap); 32167d75bbb4SMarc Zyngier its_vpe_teardown(vpe); 32177d75bbb4SMarc Zyngier irq_domain_reset_irq_data(data); 32187d75bbb4SMarc Zyngier } 32197d75bbb4SMarc Zyngier 32207d75bbb4SMarc Zyngier if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { 322138dd7c49SMarc Zyngier its_lpi_free(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); 32227d75bbb4SMarc Zyngier its_free_prop_table(vm->vprop_page); 32237d75bbb4SMarc Zyngier } 32247d75bbb4SMarc Zyngier } 32257d75bbb4SMarc Zyngier 32267d75bbb4SMarc Zyngier static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 32277d75bbb4SMarc Zyngier unsigned int nr_irqs, void *args) 32287d75bbb4SMarc Zyngier { 32297d75bbb4SMarc Zyngier struct its_vm *vm = args; 32307d75bbb4SMarc Zyngier unsigned long *bitmap; 32317d75bbb4SMarc Zyngier struct page *vprop_page; 32327d75bbb4SMarc Zyngier int base, nr_ids, i, err = 0; 32337d75bbb4SMarc Zyngier 32347d75bbb4SMarc Zyngier BUG_ON(!vm); 32357d75bbb4SMarc Zyngier 323638dd7c49SMarc Zyngier bitmap = its_lpi_alloc(roundup_pow_of_two(nr_irqs), &base, &nr_ids); 32377d75bbb4SMarc Zyngier if (!bitmap) 32387d75bbb4SMarc Zyngier return -ENOMEM; 32397d75bbb4SMarc Zyngier 32407d75bbb4SMarc Zyngier if (nr_ids < nr_irqs) { 324138dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 32427d75bbb4SMarc Zyngier return -ENOMEM; 32437d75bbb4SMarc Zyngier } 32447d75bbb4SMarc Zyngier 32457d75bbb4SMarc Zyngier vprop_page = its_allocate_prop_table(GFP_KERNEL); 32467d75bbb4SMarc Zyngier if (!vprop_page) { 324738dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 32487d75bbb4SMarc Zyngier return -ENOMEM; 32497d75bbb4SMarc Zyngier } 32507d75bbb4SMarc Zyngier 32517d75bbb4SMarc Zyngier vm->db_bitmap = bitmap; 32527d75bbb4SMarc Zyngier vm->db_lpi_base = base; 32537d75bbb4SMarc Zyngier vm->nr_db_lpis = nr_ids; 32547d75bbb4SMarc Zyngier vm->vprop_page = vprop_page; 32557d75bbb4SMarc Zyngier 32567d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 32577d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi = base + i; 32587d75bbb4SMarc Zyngier err = its_vpe_init(vm->vpes[i]); 32597d75bbb4SMarc Zyngier if (err) 32607d75bbb4SMarc Zyngier break; 32617d75bbb4SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, 32627d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi); 32637d75bbb4SMarc Zyngier if (err) 32647d75bbb4SMarc Zyngier break; 32657d75bbb4SMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, i, 32667d75bbb4SMarc Zyngier &its_vpe_irq_chip, vm->vpes[i]); 32677d75bbb4SMarc Zyngier set_bit(i, bitmap); 32687d75bbb4SMarc Zyngier } 32697d75bbb4SMarc Zyngier 32707d75bbb4SMarc Zyngier if (err) { 32717d75bbb4SMarc Zyngier if (i > 0) 32727d75bbb4SMarc Zyngier its_vpe_irq_domain_free(domain, virq, i - 1); 32737d75bbb4SMarc Zyngier 327438dd7c49SMarc Zyngier its_lpi_free(bitmap, base, nr_ids); 32757d75bbb4SMarc Zyngier its_free_prop_table(vprop_page); 32767d75bbb4SMarc Zyngier } 32777d75bbb4SMarc Zyngier 32787d75bbb4SMarc Zyngier return err; 32797d75bbb4SMarc Zyngier } 32807d75bbb4SMarc Zyngier 328172491643SThomas Gleixner static int its_vpe_irq_domain_activate(struct irq_domain *domain, 3282702cb0a0SThomas Gleixner struct irq_data *d, bool reserve) 3283eb78192bSMarc Zyngier { 3284eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 328540619a2eSMarc Zyngier struct its_node *its; 3286eb78192bSMarc Zyngier 32872247e1bfSMarc Zyngier /* If we use the list map, we issue VMAPP on demand... */ 32882247e1bfSMarc Zyngier if (its_list_map) 32896ef930f2SMarc Zyngier return 0; 3290eb78192bSMarc Zyngier 3291eb78192bSMarc Zyngier /* Map the VPE to the first possible CPU */ 3292eb78192bSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 329340619a2eSMarc Zyngier 329440619a2eSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 32950dd57fedSMarc Zyngier if (!is_v4(its)) 329640619a2eSMarc Zyngier continue; 329740619a2eSMarc Zyngier 329875fd951bSMarc Zyngier its_send_vmapp(its, vpe, true); 329940619a2eSMarc Zyngier its_send_vinvall(its, vpe); 330040619a2eSMarc Zyngier } 330140619a2eSMarc Zyngier 330244c4c25eSMarc Zyngier irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); 330344c4c25eSMarc Zyngier 330472491643SThomas Gleixner return 0; 3305eb78192bSMarc Zyngier } 3306eb78192bSMarc Zyngier 3307eb78192bSMarc Zyngier static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, 3308eb78192bSMarc Zyngier struct irq_data *d) 3309eb78192bSMarc Zyngier { 3310eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 331175fd951bSMarc Zyngier struct its_node *its; 3312eb78192bSMarc Zyngier 33132247e1bfSMarc Zyngier /* 33142247e1bfSMarc Zyngier * If we use the list map, we unmap the VPE once no VLPIs are 33152247e1bfSMarc Zyngier * associated with the VM. 33162247e1bfSMarc Zyngier */ 33172247e1bfSMarc Zyngier if (its_list_map) 33182247e1bfSMarc Zyngier return; 33192247e1bfSMarc Zyngier 332075fd951bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 33210dd57fedSMarc Zyngier if (!is_v4(its)) 332275fd951bSMarc Zyngier continue; 332375fd951bSMarc Zyngier 332475fd951bSMarc Zyngier its_send_vmapp(its, vpe, false); 332575fd951bSMarc Zyngier } 3326eb78192bSMarc Zyngier } 3327eb78192bSMarc Zyngier 33288fff27aeSMarc Zyngier static const struct irq_domain_ops its_vpe_domain_ops = { 33297d75bbb4SMarc Zyngier .alloc = its_vpe_irq_domain_alloc, 33307d75bbb4SMarc Zyngier .free = its_vpe_irq_domain_free, 3331eb78192bSMarc Zyngier .activate = its_vpe_irq_domain_activate, 3332eb78192bSMarc Zyngier .deactivate = its_vpe_irq_domain_deactivate, 33338fff27aeSMarc Zyngier }; 33348fff27aeSMarc Zyngier 33354559fbb3SYun Wu static int its_force_quiescent(void __iomem *base) 33364559fbb3SYun Wu { 33374559fbb3SYun Wu u32 count = 1000000; /* 1s */ 33384559fbb3SYun Wu u32 val; 33394559fbb3SYun Wu 33404559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 33417611da86SDavid Daney /* 33427611da86SDavid Daney * GIC architecture specification requires the ITS to be both 33437611da86SDavid Daney * disabled and quiescent for writes to GITS_BASER<n> or 33447611da86SDavid Daney * GITS_CBASER to not have UNPREDICTABLE results. 33457611da86SDavid Daney */ 33467611da86SDavid Daney if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) 33474559fbb3SYun Wu return 0; 33484559fbb3SYun Wu 33494559fbb3SYun Wu /* Disable the generation of all interrupts to this ITS */ 3350d51c4b4dSMarc Zyngier val &= ~(GITS_CTLR_ENABLE | GITS_CTLR_ImDe); 33514559fbb3SYun Wu writel_relaxed(val, base + GITS_CTLR); 33524559fbb3SYun Wu 33534559fbb3SYun Wu /* Poll GITS_CTLR and wait until ITS becomes quiescent */ 33544559fbb3SYun Wu while (1) { 33554559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 33564559fbb3SYun Wu if (val & GITS_CTLR_QUIESCENT) 33574559fbb3SYun Wu return 0; 33584559fbb3SYun Wu 33594559fbb3SYun Wu count--; 33604559fbb3SYun Wu if (!count) 33614559fbb3SYun Wu return -EBUSY; 33624559fbb3SYun Wu 33634559fbb3SYun Wu cpu_relax(); 33644559fbb3SYun Wu udelay(1); 33654559fbb3SYun Wu } 33664559fbb3SYun Wu } 33674559fbb3SYun Wu 33689d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_cavium_22375(void *data) 336994100970SRobert Richter { 337094100970SRobert Richter struct its_node *its = data; 337194100970SRobert Richter 3372576a8342SMarc Zyngier /* erratum 22375: only alloc 8MB table size (20 bits) */ 3373576a8342SMarc Zyngier its->typer &= ~GITS_TYPER_DEVBITS; 3374576a8342SMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, 20 - 1); 337594100970SRobert Richter its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; 33769d111d49SArd Biesheuvel 33779d111d49SArd Biesheuvel return true; 337894100970SRobert Richter } 337994100970SRobert Richter 33809d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_cavium_23144(void *data) 3381fbf8f40eSGanapatrao Kulkarni { 3382fbf8f40eSGanapatrao Kulkarni struct its_node *its = data; 3383fbf8f40eSGanapatrao Kulkarni 3384fbf8f40eSGanapatrao Kulkarni its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; 33859d111d49SArd Biesheuvel 33869d111d49SArd Biesheuvel return true; 3387fbf8f40eSGanapatrao Kulkarni } 3388fbf8f40eSGanapatrao Kulkarni 33899d111d49SArd Biesheuvel static bool __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) 339090922a2dSShanker Donthineni { 339190922a2dSShanker Donthineni struct its_node *its = data; 339290922a2dSShanker Donthineni 339390922a2dSShanker Donthineni /* On QDF2400, the size of the ITE is 16Bytes */ 3394ffedbf0cSMarc Zyngier its->typer &= ~GITS_TYPER_ITT_ENTRY_SIZE; 3395ffedbf0cSMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_ITT_ENTRY_SIZE, 16 - 1); 33969d111d49SArd Biesheuvel 33979d111d49SArd Biesheuvel return true; 339890922a2dSShanker Donthineni } 339990922a2dSShanker Donthineni 3400558b0165SArd Biesheuvel static u64 its_irq_get_msi_base_pre_its(struct its_device *its_dev) 3401558b0165SArd Biesheuvel { 3402558b0165SArd Biesheuvel struct its_node *its = its_dev->its; 3403558b0165SArd Biesheuvel 3404558b0165SArd Biesheuvel /* 3405558b0165SArd Biesheuvel * The Socionext Synquacer SoC has a so-called 'pre-ITS', 3406558b0165SArd Biesheuvel * which maps 32-bit writes targeted at a separate window of 3407558b0165SArd Biesheuvel * size '4 << device_id_bits' onto writes to GITS_TRANSLATER 3408558b0165SArd Biesheuvel * with device ID taken from bits [device_id_bits + 1:2] of 3409558b0165SArd Biesheuvel * the window offset. 3410558b0165SArd Biesheuvel */ 3411558b0165SArd Biesheuvel return its->pre_its_base + (its_dev->device_id << 2); 3412558b0165SArd Biesheuvel } 3413558b0165SArd Biesheuvel 3414558b0165SArd Biesheuvel static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data) 3415558b0165SArd Biesheuvel { 3416558b0165SArd Biesheuvel struct its_node *its = data; 3417558b0165SArd Biesheuvel u32 pre_its_window[2]; 3418558b0165SArd Biesheuvel u32 ids; 3419558b0165SArd Biesheuvel 3420558b0165SArd Biesheuvel if (!fwnode_property_read_u32_array(its->fwnode_handle, 3421558b0165SArd Biesheuvel "socionext,synquacer-pre-its", 3422558b0165SArd Biesheuvel pre_its_window, 3423558b0165SArd Biesheuvel ARRAY_SIZE(pre_its_window))) { 3424558b0165SArd Biesheuvel 3425558b0165SArd Biesheuvel its->pre_its_base = pre_its_window[0]; 3426558b0165SArd Biesheuvel its->get_msi_base = its_irq_get_msi_base_pre_its; 3427558b0165SArd Biesheuvel 3428558b0165SArd Biesheuvel ids = ilog2(pre_its_window[1]) - 2; 3429576a8342SMarc Zyngier if (device_ids(its) > ids) { 3430576a8342SMarc Zyngier its->typer &= ~GITS_TYPER_DEVBITS; 3431576a8342SMarc Zyngier its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, ids - 1); 3432576a8342SMarc Zyngier } 3433558b0165SArd Biesheuvel 3434558b0165SArd Biesheuvel /* the pre-ITS breaks isolation, so disable MSI remapping */ 3435558b0165SArd Biesheuvel its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP; 3436558b0165SArd Biesheuvel return true; 3437558b0165SArd Biesheuvel } 3438558b0165SArd Biesheuvel return false; 3439558b0165SArd Biesheuvel } 3440558b0165SArd Biesheuvel 34415c9a882eSMarc Zyngier static bool __maybe_unused its_enable_quirk_hip07_161600802(void *data) 34425c9a882eSMarc Zyngier { 34435c9a882eSMarc Zyngier struct its_node *its = data; 34445c9a882eSMarc Zyngier 34455c9a882eSMarc Zyngier /* 34465c9a882eSMarc Zyngier * Hip07 insists on using the wrong address for the VLPI 34475c9a882eSMarc Zyngier * page. Trick it into doing the right thing... 34485c9a882eSMarc Zyngier */ 34495c9a882eSMarc Zyngier its->vlpi_redist_offset = SZ_128K; 34505c9a882eSMarc Zyngier return true; 3451cc2d3216SMarc Zyngier } 34524c21f3c2SMarc Zyngier 345367510ccaSRobert Richter static const struct gic_quirk its_quirks[] = { 345494100970SRobert Richter #ifdef CONFIG_CAVIUM_ERRATUM_22375 345594100970SRobert Richter { 345694100970SRobert Richter .desc = "ITS: Cavium errata 22375, 24313", 345794100970SRobert Richter .iidr = 0xa100034c, /* ThunderX pass 1.x */ 345894100970SRobert Richter .mask = 0xffff0fff, 345994100970SRobert Richter .init = its_enable_quirk_cavium_22375, 346094100970SRobert Richter }, 346194100970SRobert Richter #endif 3462fbf8f40eSGanapatrao Kulkarni #ifdef CONFIG_CAVIUM_ERRATUM_23144 3463fbf8f40eSGanapatrao Kulkarni { 3464fbf8f40eSGanapatrao Kulkarni .desc = "ITS: Cavium erratum 23144", 3465fbf8f40eSGanapatrao Kulkarni .iidr = 0xa100034c, /* ThunderX pass 1.x */ 3466fbf8f40eSGanapatrao Kulkarni .mask = 0xffff0fff, 3467fbf8f40eSGanapatrao Kulkarni .init = its_enable_quirk_cavium_23144, 3468fbf8f40eSGanapatrao Kulkarni }, 3469fbf8f40eSGanapatrao Kulkarni #endif 347090922a2dSShanker Donthineni #ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 347190922a2dSShanker Donthineni { 347290922a2dSShanker Donthineni .desc = "ITS: QDF2400 erratum 0065", 347390922a2dSShanker Donthineni .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ 347490922a2dSShanker Donthineni .mask = 0xffffffff, 347590922a2dSShanker Donthineni .init = its_enable_quirk_qdf2400_e0065, 347690922a2dSShanker Donthineni }, 347790922a2dSShanker Donthineni #endif 3478558b0165SArd Biesheuvel #ifdef CONFIG_SOCIONEXT_SYNQUACER_PREITS 3479558b0165SArd Biesheuvel { 3480558b0165SArd Biesheuvel /* 3481558b0165SArd Biesheuvel * The Socionext Synquacer SoC incorporates ARM's own GIC-500 3482558b0165SArd Biesheuvel * implementation, but with a 'pre-ITS' added that requires 3483558b0165SArd Biesheuvel * special handling in software. 3484558b0165SArd Biesheuvel */ 3485558b0165SArd Biesheuvel .desc = "ITS: Socionext Synquacer pre-ITS", 3486558b0165SArd Biesheuvel .iidr = 0x0001143b, 3487558b0165SArd Biesheuvel .mask = 0xffffffff, 3488558b0165SArd Biesheuvel .init = its_enable_quirk_socionext_synquacer, 3489558b0165SArd Biesheuvel }, 3490558b0165SArd Biesheuvel #endif 34915c9a882eSMarc Zyngier #ifdef CONFIG_HISILICON_ERRATUM_161600802 34925c9a882eSMarc Zyngier { 34935c9a882eSMarc Zyngier .desc = "ITS: Hip07 erratum 161600802", 34945c9a882eSMarc Zyngier .iidr = 0x00000004, 34955c9a882eSMarc Zyngier .mask = 0xffffffff, 34965c9a882eSMarc Zyngier .init = its_enable_quirk_hip07_161600802, 34975c9a882eSMarc Zyngier }, 34985c9a882eSMarc Zyngier #endif 349967510ccaSRobert Richter { 350067510ccaSRobert Richter } 350167510ccaSRobert Richter }; 350267510ccaSRobert Richter 350367510ccaSRobert Richter static void its_enable_quirks(struct its_node *its) 350467510ccaSRobert Richter { 350567510ccaSRobert Richter u32 iidr = readl_relaxed(its->base + GITS_IIDR); 350667510ccaSRobert Richter 350767510ccaSRobert Richter gic_enable_quirks(iidr, its_quirks, its); 350867510ccaSRobert Richter } 350967510ccaSRobert Richter 3510dba0bc7bSDerek Basehore static int its_save_disable(void) 3511dba0bc7bSDerek Basehore { 3512dba0bc7bSDerek Basehore struct its_node *its; 3513dba0bc7bSDerek Basehore int err = 0; 3514dba0bc7bSDerek Basehore 3515a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 3516dba0bc7bSDerek Basehore list_for_each_entry(its, &its_nodes, entry) { 3517dba0bc7bSDerek Basehore void __iomem *base; 3518dba0bc7bSDerek Basehore 3519dba0bc7bSDerek Basehore if (!(its->flags & ITS_FLAGS_SAVE_SUSPEND_STATE)) 3520dba0bc7bSDerek Basehore continue; 3521dba0bc7bSDerek Basehore 3522dba0bc7bSDerek Basehore base = its->base; 3523dba0bc7bSDerek Basehore its->ctlr_save = readl_relaxed(base + GITS_CTLR); 3524dba0bc7bSDerek Basehore err = its_force_quiescent(base); 3525dba0bc7bSDerek Basehore if (err) { 3526dba0bc7bSDerek Basehore pr_err("ITS@%pa: failed to quiesce: %d\n", 3527dba0bc7bSDerek Basehore &its->phys_base, err); 3528dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 3529dba0bc7bSDerek Basehore goto err; 3530dba0bc7bSDerek Basehore } 3531dba0bc7bSDerek Basehore 3532dba0bc7bSDerek Basehore its->cbaser_save = gits_read_cbaser(base + GITS_CBASER); 3533dba0bc7bSDerek Basehore } 3534dba0bc7bSDerek Basehore 3535dba0bc7bSDerek Basehore err: 3536dba0bc7bSDerek Basehore if (err) { 3537dba0bc7bSDerek Basehore list_for_each_entry_continue_reverse(its, &its_nodes, entry) { 3538dba0bc7bSDerek Basehore void __iomem *base; 3539dba0bc7bSDerek Basehore 3540dba0bc7bSDerek Basehore if (!(its->flags & ITS_FLAGS_SAVE_SUSPEND_STATE)) 3541dba0bc7bSDerek Basehore continue; 3542dba0bc7bSDerek Basehore 3543dba0bc7bSDerek Basehore base = its->base; 3544dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 3545dba0bc7bSDerek Basehore } 3546dba0bc7bSDerek Basehore } 3547a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 3548dba0bc7bSDerek Basehore 3549dba0bc7bSDerek Basehore return err; 3550dba0bc7bSDerek Basehore } 3551dba0bc7bSDerek Basehore 3552dba0bc7bSDerek Basehore static void its_restore_enable(void) 3553dba0bc7bSDerek Basehore { 3554dba0bc7bSDerek Basehore struct its_node *its; 3555dba0bc7bSDerek Basehore int ret; 3556dba0bc7bSDerek Basehore 3557a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 3558dba0bc7bSDerek Basehore list_for_each_entry(its, &its_nodes, entry) { 3559dba0bc7bSDerek Basehore void __iomem *base; 3560dba0bc7bSDerek Basehore int i; 3561dba0bc7bSDerek Basehore 3562dba0bc7bSDerek Basehore if (!(its->flags & ITS_FLAGS_SAVE_SUSPEND_STATE)) 3563dba0bc7bSDerek Basehore continue; 3564dba0bc7bSDerek Basehore 3565dba0bc7bSDerek Basehore base = its->base; 3566dba0bc7bSDerek Basehore 3567dba0bc7bSDerek Basehore /* 3568dba0bc7bSDerek Basehore * Make sure that the ITS is disabled. If it fails to quiesce, 3569dba0bc7bSDerek Basehore * don't restore it since writing to CBASER or BASER<n> 3570dba0bc7bSDerek Basehore * registers is undefined according to the GIC v3 ITS 3571dba0bc7bSDerek Basehore * Specification. 3572dba0bc7bSDerek Basehore */ 3573dba0bc7bSDerek Basehore ret = its_force_quiescent(base); 3574dba0bc7bSDerek Basehore if (ret) { 3575dba0bc7bSDerek Basehore pr_err("ITS@%pa: failed to quiesce on resume: %d\n", 3576dba0bc7bSDerek Basehore &its->phys_base, ret); 3577dba0bc7bSDerek Basehore continue; 3578dba0bc7bSDerek Basehore } 3579dba0bc7bSDerek Basehore 3580dba0bc7bSDerek Basehore gits_write_cbaser(its->cbaser_save, base + GITS_CBASER); 3581dba0bc7bSDerek Basehore 3582dba0bc7bSDerek Basehore /* 3583dba0bc7bSDerek Basehore * Writing CBASER resets CREADR to 0, so make CWRITER and 3584dba0bc7bSDerek Basehore * cmd_write line up with it. 3585dba0bc7bSDerek Basehore */ 3586dba0bc7bSDerek Basehore its->cmd_write = its->cmd_base; 3587dba0bc7bSDerek Basehore gits_write_cwriter(0, base + GITS_CWRITER); 3588dba0bc7bSDerek Basehore 3589dba0bc7bSDerek Basehore /* Restore GITS_BASER from the value cache. */ 3590dba0bc7bSDerek Basehore for (i = 0; i < GITS_BASER_NR_REGS; i++) { 3591dba0bc7bSDerek Basehore struct its_baser *baser = &its->tables[i]; 3592dba0bc7bSDerek Basehore 3593dba0bc7bSDerek Basehore if (!(baser->val & GITS_BASER_VALID)) 3594dba0bc7bSDerek Basehore continue; 3595dba0bc7bSDerek Basehore 3596dba0bc7bSDerek Basehore its_write_baser(its, baser, baser->val); 3597dba0bc7bSDerek Basehore } 3598dba0bc7bSDerek Basehore writel_relaxed(its->ctlr_save, base + GITS_CTLR); 3599920181ceSDerek Basehore 3600920181ceSDerek Basehore /* 3601920181ceSDerek Basehore * Reinit the collection if it's stored in the ITS. This is 3602920181ceSDerek Basehore * indicated by the col_id being less than the HCC field. 3603920181ceSDerek Basehore * CID < HCC as specified in the GIC v3 Documentation. 3604920181ceSDerek Basehore */ 3605920181ceSDerek Basehore if (its->collections[smp_processor_id()].col_id < 3606920181ceSDerek Basehore GITS_TYPER_HCC(gic_read_typer(base + GITS_TYPER))) 3607920181ceSDerek Basehore its_cpu_init_collection(its); 3608dba0bc7bSDerek Basehore } 3609a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 3610dba0bc7bSDerek Basehore } 3611dba0bc7bSDerek Basehore 3612dba0bc7bSDerek Basehore static struct syscore_ops its_syscore_ops = { 3613dba0bc7bSDerek Basehore .suspend = its_save_disable, 3614dba0bc7bSDerek Basehore .resume = its_restore_enable, 3615dba0bc7bSDerek Basehore }; 3616dba0bc7bSDerek Basehore 3617db40f0a7STomasz Nowicki static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) 3618d14ae5e6STomasz Nowicki { 3619d14ae5e6STomasz Nowicki struct irq_domain *inner_domain; 3620d14ae5e6STomasz Nowicki struct msi_domain_info *info; 3621d14ae5e6STomasz Nowicki 3622d14ae5e6STomasz Nowicki info = kzalloc(sizeof(*info), GFP_KERNEL); 3623d14ae5e6STomasz Nowicki if (!info) 3624d14ae5e6STomasz Nowicki return -ENOMEM; 3625d14ae5e6STomasz Nowicki 3626db40f0a7STomasz Nowicki inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); 3627d14ae5e6STomasz Nowicki if (!inner_domain) { 3628d14ae5e6STomasz Nowicki kfree(info); 3629d14ae5e6STomasz Nowicki return -ENOMEM; 3630d14ae5e6STomasz Nowicki } 3631d14ae5e6STomasz Nowicki 3632db40f0a7STomasz Nowicki inner_domain->parent = its_parent; 363396f0d93aSMarc Zyngier irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); 3634558b0165SArd Biesheuvel inner_domain->flags |= its->msi_domain_flags; 3635d14ae5e6STomasz Nowicki info->ops = &its_msi_domain_ops; 3636d14ae5e6STomasz Nowicki info->data = its; 3637d14ae5e6STomasz Nowicki inner_domain->host_data = info; 3638d14ae5e6STomasz Nowicki 3639d14ae5e6STomasz Nowicki return 0; 3640d14ae5e6STomasz Nowicki } 3641d14ae5e6STomasz Nowicki 36428fff27aeSMarc Zyngier static int its_init_vpe_domain(void) 36438fff27aeSMarc Zyngier { 364420b3d54eSMarc Zyngier struct its_node *its; 364520b3d54eSMarc Zyngier u32 devid; 364620b3d54eSMarc Zyngier int entries; 364720b3d54eSMarc Zyngier 364820b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 364920b3d54eSMarc Zyngier pr_info("ITS: Using DirectLPI for VPE invalidation\n"); 365020b3d54eSMarc Zyngier return 0; 365120b3d54eSMarc Zyngier } 365220b3d54eSMarc Zyngier 365320b3d54eSMarc Zyngier /* Any ITS will do, even if not v4 */ 365420b3d54eSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 365520b3d54eSMarc Zyngier 365620b3d54eSMarc Zyngier entries = roundup_pow_of_two(nr_cpu_ids); 36576396bb22SKees Cook vpe_proxy.vpes = kcalloc(entries, sizeof(*vpe_proxy.vpes), 365820b3d54eSMarc Zyngier GFP_KERNEL); 365920b3d54eSMarc Zyngier if (!vpe_proxy.vpes) { 366020b3d54eSMarc Zyngier pr_err("ITS: Can't allocate GICv4 proxy device array\n"); 366120b3d54eSMarc Zyngier return -ENOMEM; 366220b3d54eSMarc Zyngier } 366320b3d54eSMarc Zyngier 366420b3d54eSMarc Zyngier /* Use the last possible DevID */ 3665576a8342SMarc Zyngier devid = GENMASK(device_ids(its) - 1, 0); 366620b3d54eSMarc Zyngier vpe_proxy.dev = its_create_device(its, devid, entries, false); 366720b3d54eSMarc Zyngier if (!vpe_proxy.dev) { 366820b3d54eSMarc Zyngier kfree(vpe_proxy.vpes); 366920b3d54eSMarc Zyngier pr_err("ITS: Can't allocate GICv4 proxy device\n"); 367020b3d54eSMarc Zyngier return -ENOMEM; 367120b3d54eSMarc Zyngier } 367220b3d54eSMarc Zyngier 3673c427a475SShanker Donthineni BUG_ON(entries > vpe_proxy.dev->nr_ites); 367420b3d54eSMarc Zyngier 367520b3d54eSMarc Zyngier raw_spin_lock_init(&vpe_proxy.lock); 367620b3d54eSMarc Zyngier vpe_proxy.next_victim = 0; 367720b3d54eSMarc Zyngier pr_info("ITS: Allocated DevID %x as GICv4 proxy device (%d slots)\n", 367820b3d54eSMarc Zyngier devid, vpe_proxy.dev->nr_ites); 367920b3d54eSMarc Zyngier 36808fff27aeSMarc Zyngier return 0; 36818fff27aeSMarc Zyngier } 36828fff27aeSMarc Zyngier 36833dfa576bSMarc Zyngier static int __init its_compute_its_list_map(struct resource *res, 36843dfa576bSMarc Zyngier void __iomem *its_base) 36853dfa576bSMarc Zyngier { 36863dfa576bSMarc Zyngier int its_number; 36873dfa576bSMarc Zyngier u32 ctlr; 36883dfa576bSMarc Zyngier 36893dfa576bSMarc Zyngier /* 36903dfa576bSMarc Zyngier * This is assumed to be done early enough that we're 36913dfa576bSMarc Zyngier * guaranteed to be single-threaded, hence no 36923dfa576bSMarc Zyngier * locking. Should this change, we should address 36933dfa576bSMarc Zyngier * this. 36943dfa576bSMarc Zyngier */ 3695ab60491eSMarc Zyngier its_number = find_first_zero_bit(&its_list_map, GICv4_ITS_LIST_MAX); 3696ab60491eSMarc Zyngier if (its_number >= GICv4_ITS_LIST_MAX) { 36973dfa576bSMarc Zyngier pr_err("ITS@%pa: No ITSList entry available!\n", 36983dfa576bSMarc Zyngier &res->start); 36993dfa576bSMarc Zyngier return -EINVAL; 37003dfa576bSMarc Zyngier } 37013dfa576bSMarc Zyngier 37023dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 37033dfa576bSMarc Zyngier ctlr &= ~GITS_CTLR_ITS_NUMBER; 37043dfa576bSMarc Zyngier ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; 37053dfa576bSMarc Zyngier writel_relaxed(ctlr, its_base + GITS_CTLR); 37063dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 37073dfa576bSMarc Zyngier if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { 37083dfa576bSMarc Zyngier its_number = ctlr & GITS_CTLR_ITS_NUMBER; 37093dfa576bSMarc Zyngier its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; 37103dfa576bSMarc Zyngier } 37113dfa576bSMarc Zyngier 37123dfa576bSMarc Zyngier if (test_and_set_bit(its_number, &its_list_map)) { 37133dfa576bSMarc Zyngier pr_err("ITS@%pa: Duplicate ITSList entry %d\n", 37143dfa576bSMarc Zyngier &res->start, its_number); 37153dfa576bSMarc Zyngier return -EINVAL; 37163dfa576bSMarc Zyngier } 37173dfa576bSMarc Zyngier 37183dfa576bSMarc Zyngier return its_number; 37193dfa576bSMarc Zyngier } 37203dfa576bSMarc Zyngier 3721db40f0a7STomasz Nowicki static int __init its_probe_one(struct resource *res, 3722db40f0a7STomasz Nowicki struct fwnode_handle *handle, int numa_node) 37234c21f3c2SMarc Zyngier { 37244c21f3c2SMarc Zyngier struct its_node *its; 37254c21f3c2SMarc Zyngier void __iomem *its_base; 37263dfa576bSMarc Zyngier u32 val, ctlr; 37273dfa576bSMarc Zyngier u64 baser, tmp, typer; 3728539d3782SShanker Donthineni struct page *page; 37294c21f3c2SMarc Zyngier int err; 37304c21f3c2SMarc Zyngier 3731db40f0a7STomasz Nowicki its_base = ioremap(res->start, resource_size(res)); 37324c21f3c2SMarc Zyngier if (!its_base) { 3733db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); 37344c21f3c2SMarc Zyngier return -ENOMEM; 37354c21f3c2SMarc Zyngier } 37364c21f3c2SMarc Zyngier 37374c21f3c2SMarc Zyngier val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; 37384c21f3c2SMarc Zyngier if (val != 0x30 && val != 0x40) { 3739db40f0a7STomasz Nowicki pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); 37404c21f3c2SMarc Zyngier err = -ENODEV; 37414c21f3c2SMarc Zyngier goto out_unmap; 37424c21f3c2SMarc Zyngier } 37434c21f3c2SMarc Zyngier 37444559fbb3SYun Wu err = its_force_quiescent(its_base); 37454559fbb3SYun Wu if (err) { 3746db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); 37474559fbb3SYun Wu goto out_unmap; 37484559fbb3SYun Wu } 37494559fbb3SYun Wu 3750db40f0a7STomasz Nowicki pr_info("ITS %pR\n", res); 37514c21f3c2SMarc Zyngier 37524c21f3c2SMarc Zyngier its = kzalloc(sizeof(*its), GFP_KERNEL); 37534c21f3c2SMarc Zyngier if (!its) { 37544c21f3c2SMarc Zyngier err = -ENOMEM; 37554c21f3c2SMarc Zyngier goto out_unmap; 37564c21f3c2SMarc Zyngier } 37574c21f3c2SMarc Zyngier 37584c21f3c2SMarc Zyngier raw_spin_lock_init(&its->lock); 37599791ec7dSMarc Zyngier mutex_init(&its->dev_alloc_lock); 37604c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->entry); 37614c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->its_device_list); 37623dfa576bSMarc Zyngier typer = gic_read_typer(its_base + GITS_TYPER); 37630dd57fedSMarc Zyngier its->typer = typer; 37644c21f3c2SMarc Zyngier its->base = its_base; 3765db40f0a7STomasz Nowicki its->phys_base = res->start; 37660dd57fedSMarc Zyngier if (is_v4(its)) { 37673dfa576bSMarc Zyngier if (!(typer & GITS_TYPER_VMOVP)) { 37683dfa576bSMarc Zyngier err = its_compute_its_list_map(res, its_base); 37693dfa576bSMarc Zyngier if (err < 0) 37703dfa576bSMarc Zyngier goto out_free_its; 37713dfa576bSMarc Zyngier 3772debf6d02SMarc Zyngier its->list_nr = err; 3773debf6d02SMarc Zyngier 37743dfa576bSMarc Zyngier pr_info("ITS@%pa: Using ITS number %d\n", 37753dfa576bSMarc Zyngier &res->start, err); 37763dfa576bSMarc Zyngier } else { 37773dfa576bSMarc Zyngier pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); 37783dfa576bSMarc Zyngier } 37793dfa576bSMarc Zyngier } 37803dfa576bSMarc Zyngier 3781db40f0a7STomasz Nowicki its->numa_node = numa_node; 37824c21f3c2SMarc Zyngier 3783539d3782SShanker Donthineni page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, 37845bc13c2cSRobert Richter get_order(ITS_CMD_QUEUE_SZ)); 3785539d3782SShanker Donthineni if (!page) { 37864c21f3c2SMarc Zyngier err = -ENOMEM; 37874c21f3c2SMarc Zyngier goto out_free_its; 37884c21f3c2SMarc Zyngier } 3789539d3782SShanker Donthineni its->cmd_base = (void *)page_address(page); 37904c21f3c2SMarc Zyngier its->cmd_write = its->cmd_base; 3791558b0165SArd Biesheuvel its->fwnode_handle = handle; 3792558b0165SArd Biesheuvel its->get_msi_base = its_irq_get_msi_base; 3793558b0165SArd Biesheuvel its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP; 37944c21f3c2SMarc Zyngier 379567510ccaSRobert Richter its_enable_quirks(its); 379667510ccaSRobert Richter 37970e0b0f69SShanker Donthineni err = its_alloc_tables(its); 37984c21f3c2SMarc Zyngier if (err) 37994c21f3c2SMarc Zyngier goto out_free_cmd; 38004c21f3c2SMarc Zyngier 38014c21f3c2SMarc Zyngier err = its_alloc_collections(its); 38024c21f3c2SMarc Zyngier if (err) 38034c21f3c2SMarc Zyngier goto out_free_tables; 38044c21f3c2SMarc Zyngier 38054c21f3c2SMarc Zyngier baser = (virt_to_phys(its->cmd_base) | 38062fd632a0SShanker Donthineni GITS_CBASER_RaWaWb | 38074c21f3c2SMarc Zyngier GITS_CBASER_InnerShareable | 38084c21f3c2SMarc Zyngier (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | 38094c21f3c2SMarc Zyngier GITS_CBASER_VALID); 38104c21f3c2SMarc Zyngier 38110968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 38120968a619SVladimir Murzin tmp = gits_read_cbaser(its->base + GITS_CBASER); 38134c21f3c2SMarc Zyngier 38144ad3e363SMarc Zyngier if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { 3815241a386cSMarc Zyngier if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { 3816241a386cSMarc Zyngier /* 3817241a386cSMarc Zyngier * The HW reports non-shareable, we must 3818241a386cSMarc Zyngier * remove the cacheability attributes as 3819241a386cSMarc Zyngier * well. 3820241a386cSMarc Zyngier */ 3821241a386cSMarc Zyngier baser &= ~(GITS_CBASER_SHAREABILITY_MASK | 3822241a386cSMarc Zyngier GITS_CBASER_CACHEABILITY_MASK); 3823241a386cSMarc Zyngier baser |= GITS_CBASER_nC; 38240968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 3825241a386cSMarc Zyngier } 38264c21f3c2SMarc Zyngier pr_info("ITS: using cache flushing for cmd queue\n"); 38274c21f3c2SMarc Zyngier its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; 38284c21f3c2SMarc Zyngier } 38294c21f3c2SMarc Zyngier 38300968a619SVladimir Murzin gits_write_cwriter(0, its->base + GITS_CWRITER); 38313dfa576bSMarc Zyngier ctlr = readl_relaxed(its->base + GITS_CTLR); 3832d51c4b4dSMarc Zyngier ctlr |= GITS_CTLR_ENABLE; 38330dd57fedSMarc Zyngier if (is_v4(its)) 3834d51c4b4dSMarc Zyngier ctlr |= GITS_CTLR_ImDe; 3835d51c4b4dSMarc Zyngier writel_relaxed(ctlr, its->base + GITS_CTLR); 3836241a386cSMarc Zyngier 3837dba0bc7bSDerek Basehore if (GITS_TYPER_HCC(typer)) 3838dba0bc7bSDerek Basehore its->flags |= ITS_FLAGS_SAVE_SUSPEND_STATE; 3839dba0bc7bSDerek Basehore 3840db40f0a7STomasz Nowicki err = its_init_domain(handle, its); 3841d14ae5e6STomasz Nowicki if (err) 384254456db9SMarc Zyngier goto out_free_tables; 38434c21f3c2SMarc Zyngier 3844a8db7456SSebastian Andrzej Siewior raw_spin_lock(&its_lock); 38454c21f3c2SMarc Zyngier list_add(&its->entry, &its_nodes); 3846a8db7456SSebastian Andrzej Siewior raw_spin_unlock(&its_lock); 38474c21f3c2SMarc Zyngier 38484c21f3c2SMarc Zyngier return 0; 38494c21f3c2SMarc Zyngier 38504c21f3c2SMarc Zyngier out_free_tables: 38514c21f3c2SMarc Zyngier its_free_tables(its); 38524c21f3c2SMarc Zyngier out_free_cmd: 38535bc13c2cSRobert Richter free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); 38544c21f3c2SMarc Zyngier out_free_its: 38554c21f3c2SMarc Zyngier kfree(its); 38564c21f3c2SMarc Zyngier out_unmap: 38574c21f3c2SMarc Zyngier iounmap(its_base); 3858db40f0a7STomasz Nowicki pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); 38594c21f3c2SMarc Zyngier return err; 38604c21f3c2SMarc Zyngier } 38614c21f3c2SMarc Zyngier 38624c21f3c2SMarc Zyngier static bool gic_rdists_supports_plpis(void) 38634c21f3c2SMarc Zyngier { 3864589ce5f4SMarc Zyngier return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); 38654c21f3c2SMarc Zyngier } 38664c21f3c2SMarc Zyngier 38676eb486b6SShanker Donthineni static int redist_disable_lpis(void) 38684c21f3c2SMarc Zyngier { 38696eb486b6SShanker Donthineni void __iomem *rbase = gic_data_rdist_rd_base(); 38706eb486b6SShanker Donthineni u64 timeout = USEC_PER_SEC; 38716eb486b6SShanker Donthineni u64 val; 38726eb486b6SShanker Donthineni 38734c21f3c2SMarc Zyngier if (!gic_rdists_supports_plpis()) { 38744c21f3c2SMarc Zyngier pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); 38754c21f3c2SMarc Zyngier return -ENXIO; 38764c21f3c2SMarc Zyngier } 38776eb486b6SShanker Donthineni 38786eb486b6SShanker Donthineni val = readl_relaxed(rbase + GICR_CTLR); 38796eb486b6SShanker Donthineni if (!(val & GICR_CTLR_ENABLE_LPIS)) 38806eb486b6SShanker Donthineni return 0; 38816eb486b6SShanker Donthineni 388211e37d35SMarc Zyngier /* 388311e37d35SMarc Zyngier * If coming via a CPU hotplug event, we don't need to disable 388411e37d35SMarc Zyngier * LPIs before trying to re-enable them. They are already 388511e37d35SMarc Zyngier * configured and all is well in the world. 3886c440a9d9SMarc Zyngier * 3887c440a9d9SMarc Zyngier * If running with preallocated tables, there is nothing to do. 388811e37d35SMarc Zyngier */ 3889c440a9d9SMarc Zyngier if (gic_data_rdist()->lpi_enabled || 3890c440a9d9SMarc Zyngier (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED)) 389111e37d35SMarc Zyngier return 0; 389211e37d35SMarc Zyngier 389311e37d35SMarc Zyngier /* 389411e37d35SMarc Zyngier * From that point on, we only try to do some damage control. 389511e37d35SMarc Zyngier */ 389611e37d35SMarc Zyngier pr_warn("GICv3: CPU%d: Booted with LPIs enabled, memory probably corrupted\n", 38976eb486b6SShanker Donthineni smp_processor_id()); 38986eb486b6SShanker Donthineni add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); 38996eb486b6SShanker Donthineni 39006eb486b6SShanker Donthineni /* Disable LPIs */ 39016eb486b6SShanker Donthineni val &= ~GICR_CTLR_ENABLE_LPIS; 39026eb486b6SShanker Donthineni writel_relaxed(val, rbase + GICR_CTLR); 39036eb486b6SShanker Donthineni 39046eb486b6SShanker Donthineni /* Make sure any change to GICR_CTLR is observable by the GIC */ 39056eb486b6SShanker Donthineni dsb(sy); 39066eb486b6SShanker Donthineni 39076eb486b6SShanker Donthineni /* 39086eb486b6SShanker Donthineni * Software must observe RWP==0 after clearing GICR_CTLR.EnableLPIs 39096eb486b6SShanker Donthineni * from 1 to 0 before programming GICR_PEND{PROP}BASER registers. 39106eb486b6SShanker Donthineni * Error out if we time out waiting for RWP to clear. 39116eb486b6SShanker Donthineni */ 39126eb486b6SShanker Donthineni while (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_RWP) { 39136eb486b6SShanker Donthineni if (!timeout) { 39146eb486b6SShanker Donthineni pr_err("CPU%d: Timeout while disabling LPIs\n", 39156eb486b6SShanker Donthineni smp_processor_id()); 39166eb486b6SShanker Donthineni return -ETIMEDOUT; 39176eb486b6SShanker Donthineni } 39186eb486b6SShanker Donthineni udelay(1); 39196eb486b6SShanker Donthineni timeout--; 39206eb486b6SShanker Donthineni } 39216eb486b6SShanker Donthineni 39226eb486b6SShanker Donthineni /* 39236eb486b6SShanker Donthineni * After it has been written to 1, it is IMPLEMENTATION 39246eb486b6SShanker Donthineni * DEFINED whether GICR_CTLR.EnableLPI becomes RES1 or can be 39256eb486b6SShanker Donthineni * cleared to 0. Error out if clearing the bit failed. 39266eb486b6SShanker Donthineni */ 39276eb486b6SShanker Donthineni if (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_ENABLE_LPIS) { 39286eb486b6SShanker Donthineni pr_err("CPU%d: Failed to disable LPIs\n", smp_processor_id()); 39296eb486b6SShanker Donthineni return -EBUSY; 39306eb486b6SShanker Donthineni } 39316eb486b6SShanker Donthineni 39326eb486b6SShanker Donthineni return 0; 39336eb486b6SShanker Donthineni } 39346eb486b6SShanker Donthineni 39356eb486b6SShanker Donthineni int its_cpu_init(void) 39366eb486b6SShanker Donthineni { 39376eb486b6SShanker Donthineni if (!list_empty(&its_nodes)) { 39386eb486b6SShanker Donthineni int ret; 39396eb486b6SShanker Donthineni 39406eb486b6SShanker Donthineni ret = redist_disable_lpis(); 39416eb486b6SShanker Donthineni if (ret) 39426eb486b6SShanker Donthineni return ret; 39436eb486b6SShanker Donthineni 39444c21f3c2SMarc Zyngier its_cpu_init_lpis(); 3945920181ceSDerek Basehore its_cpu_init_collections(); 39464c21f3c2SMarc Zyngier } 39474c21f3c2SMarc Zyngier 39484c21f3c2SMarc Zyngier return 0; 39494c21f3c2SMarc Zyngier } 39504c21f3c2SMarc Zyngier 3951935bba7cSArvind Yadav static const struct of_device_id its_device_id[] = { 39524c21f3c2SMarc Zyngier { .compatible = "arm,gic-v3-its", }, 39534c21f3c2SMarc Zyngier {}, 39544c21f3c2SMarc Zyngier }; 39554c21f3c2SMarc Zyngier 3956db40f0a7STomasz Nowicki static int __init its_of_probe(struct device_node *node) 39574c21f3c2SMarc Zyngier { 39584c21f3c2SMarc Zyngier struct device_node *np; 3959db40f0a7STomasz Nowicki struct resource res; 39604c21f3c2SMarc Zyngier 39614c21f3c2SMarc Zyngier for (np = of_find_matching_node(node, its_device_id); np; 39624c21f3c2SMarc Zyngier np = of_find_matching_node(np, its_device_id)) { 396395a25625SStephen Boyd if (!of_device_is_available(np)) 396495a25625SStephen Boyd continue; 3965d14ae5e6STomasz Nowicki if (!of_property_read_bool(np, "msi-controller")) { 3966e81f54c6SRob Herring pr_warn("%pOF: no msi-controller property, ITS ignored\n", 3967e81f54c6SRob Herring np); 3968d14ae5e6STomasz Nowicki continue; 3969d14ae5e6STomasz Nowicki } 3970d14ae5e6STomasz Nowicki 3971db40f0a7STomasz Nowicki if (of_address_to_resource(np, 0, &res)) { 3972e81f54c6SRob Herring pr_warn("%pOF: no regs?\n", np); 3973db40f0a7STomasz Nowicki continue; 39744c21f3c2SMarc Zyngier } 39754c21f3c2SMarc Zyngier 3976db40f0a7STomasz Nowicki its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); 3977db40f0a7STomasz Nowicki } 3978db40f0a7STomasz Nowicki return 0; 3979db40f0a7STomasz Nowicki } 3980db40f0a7STomasz Nowicki 39813f010cf1STomasz Nowicki #ifdef CONFIG_ACPI 39823f010cf1STomasz Nowicki 39833f010cf1STomasz Nowicki #define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) 39843f010cf1STomasz Nowicki 3985d1ce263fSRobert Richter #ifdef CONFIG_ACPI_NUMA 3986dbd2b826SGanapatrao Kulkarni struct its_srat_map { 3987dbd2b826SGanapatrao Kulkarni /* numa node id */ 3988dbd2b826SGanapatrao Kulkarni u32 numa_node; 3989dbd2b826SGanapatrao Kulkarni /* GIC ITS ID */ 3990dbd2b826SGanapatrao Kulkarni u32 its_id; 3991dbd2b826SGanapatrao Kulkarni }; 3992dbd2b826SGanapatrao Kulkarni 3993fdf6e7a8SHanjun Guo static struct its_srat_map *its_srat_maps __initdata; 3994dbd2b826SGanapatrao Kulkarni static int its_in_srat __initdata; 3995dbd2b826SGanapatrao Kulkarni 3996dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) 3997dbd2b826SGanapatrao Kulkarni { 3998dbd2b826SGanapatrao Kulkarni int i; 3999dbd2b826SGanapatrao Kulkarni 4000dbd2b826SGanapatrao Kulkarni for (i = 0; i < its_in_srat; i++) { 4001dbd2b826SGanapatrao Kulkarni if (its_id == its_srat_maps[i].its_id) 4002dbd2b826SGanapatrao Kulkarni return its_srat_maps[i].numa_node; 4003dbd2b826SGanapatrao Kulkarni } 4004dbd2b826SGanapatrao Kulkarni return NUMA_NO_NODE; 4005dbd2b826SGanapatrao Kulkarni } 4006dbd2b826SGanapatrao Kulkarni 400760574d1eSKeith Busch static int __init gic_acpi_match_srat_its(union acpi_subtable_headers *header, 4008fdf6e7a8SHanjun Guo const unsigned long end) 4009fdf6e7a8SHanjun Guo { 4010fdf6e7a8SHanjun Guo return 0; 4011fdf6e7a8SHanjun Guo } 4012fdf6e7a8SHanjun Guo 401360574d1eSKeith Busch static int __init gic_acpi_parse_srat_its(union acpi_subtable_headers *header, 4014dbd2b826SGanapatrao Kulkarni const unsigned long end) 4015dbd2b826SGanapatrao Kulkarni { 4016dbd2b826SGanapatrao Kulkarni int node; 4017dbd2b826SGanapatrao Kulkarni struct acpi_srat_gic_its_affinity *its_affinity; 4018dbd2b826SGanapatrao Kulkarni 4019dbd2b826SGanapatrao Kulkarni its_affinity = (struct acpi_srat_gic_its_affinity *)header; 4020dbd2b826SGanapatrao Kulkarni if (!its_affinity) 4021dbd2b826SGanapatrao Kulkarni return -EINVAL; 4022dbd2b826SGanapatrao Kulkarni 4023dbd2b826SGanapatrao Kulkarni if (its_affinity->header.length < sizeof(*its_affinity)) { 4024dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid header length %d in ITS affinity\n", 4025dbd2b826SGanapatrao Kulkarni its_affinity->header.length); 4026dbd2b826SGanapatrao Kulkarni return -EINVAL; 4027dbd2b826SGanapatrao Kulkarni } 4028dbd2b826SGanapatrao Kulkarni 4029dbd2b826SGanapatrao Kulkarni node = acpi_map_pxm_to_node(its_affinity->proximity_domain); 4030dbd2b826SGanapatrao Kulkarni 4031dbd2b826SGanapatrao Kulkarni if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { 4032dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); 4033dbd2b826SGanapatrao Kulkarni return 0; 4034dbd2b826SGanapatrao Kulkarni } 4035dbd2b826SGanapatrao Kulkarni 4036dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].numa_node = node; 4037dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].its_id = its_affinity->its_id; 4038dbd2b826SGanapatrao Kulkarni its_in_srat++; 4039dbd2b826SGanapatrao Kulkarni pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", 4040dbd2b826SGanapatrao Kulkarni its_affinity->proximity_domain, its_affinity->its_id, node); 4041dbd2b826SGanapatrao Kulkarni 4042dbd2b826SGanapatrao Kulkarni return 0; 4043dbd2b826SGanapatrao Kulkarni } 4044dbd2b826SGanapatrao Kulkarni 4045dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) 4046dbd2b826SGanapatrao Kulkarni { 4047fdf6e7a8SHanjun Guo int count; 4048fdf6e7a8SHanjun Guo 4049fdf6e7a8SHanjun Guo count = acpi_table_parse_entries(ACPI_SIG_SRAT, 4050fdf6e7a8SHanjun Guo sizeof(struct acpi_table_srat), 4051fdf6e7a8SHanjun Guo ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 4052fdf6e7a8SHanjun Guo gic_acpi_match_srat_its, 0); 4053fdf6e7a8SHanjun Guo if (count <= 0) 4054fdf6e7a8SHanjun Guo return; 4055fdf6e7a8SHanjun Guo 40566da2ec56SKees Cook its_srat_maps = kmalloc_array(count, sizeof(struct its_srat_map), 4057fdf6e7a8SHanjun Guo GFP_KERNEL); 4058fdf6e7a8SHanjun Guo if (!its_srat_maps) { 4059fdf6e7a8SHanjun Guo pr_warn("SRAT: Failed to allocate memory for its_srat_maps!\n"); 4060fdf6e7a8SHanjun Guo return; 4061fdf6e7a8SHanjun Guo } 4062fdf6e7a8SHanjun Guo 4063dbd2b826SGanapatrao Kulkarni acpi_table_parse_entries(ACPI_SIG_SRAT, 4064dbd2b826SGanapatrao Kulkarni sizeof(struct acpi_table_srat), 4065dbd2b826SGanapatrao Kulkarni ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 4066dbd2b826SGanapatrao Kulkarni gic_acpi_parse_srat_its, 0); 4067dbd2b826SGanapatrao Kulkarni } 4068fdf6e7a8SHanjun Guo 4069fdf6e7a8SHanjun Guo /* free the its_srat_maps after ITS probing */ 4070fdf6e7a8SHanjun Guo static void __init acpi_its_srat_maps_free(void) 4071fdf6e7a8SHanjun Guo { 4072fdf6e7a8SHanjun Guo kfree(its_srat_maps); 4073fdf6e7a8SHanjun Guo } 4074dbd2b826SGanapatrao Kulkarni #else 4075dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) { } 4076dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } 4077fdf6e7a8SHanjun Guo static void __init acpi_its_srat_maps_free(void) { } 4078dbd2b826SGanapatrao Kulkarni #endif 4079dbd2b826SGanapatrao Kulkarni 408060574d1eSKeith Busch static int __init gic_acpi_parse_madt_its(union acpi_subtable_headers *header, 40813f010cf1STomasz Nowicki const unsigned long end) 40823f010cf1STomasz Nowicki { 40833f010cf1STomasz Nowicki struct acpi_madt_generic_translator *its_entry; 40843f010cf1STomasz Nowicki struct fwnode_handle *dom_handle; 40853f010cf1STomasz Nowicki struct resource res; 40863f010cf1STomasz Nowicki int err; 40873f010cf1STomasz Nowicki 40883f010cf1STomasz Nowicki its_entry = (struct acpi_madt_generic_translator *)header; 40893f010cf1STomasz Nowicki memset(&res, 0, sizeof(res)); 40903f010cf1STomasz Nowicki res.start = its_entry->base_address; 40913f010cf1STomasz Nowicki res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; 40923f010cf1STomasz Nowicki res.flags = IORESOURCE_MEM; 40933f010cf1STomasz Nowicki 40945778cc77SMarc Zyngier dom_handle = irq_domain_alloc_fwnode(&res.start); 40953f010cf1STomasz Nowicki if (!dom_handle) { 40963f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", 40973f010cf1STomasz Nowicki &res.start); 40983f010cf1STomasz Nowicki return -ENOMEM; 40993f010cf1STomasz Nowicki } 41003f010cf1STomasz Nowicki 41018b4282e6SShameer Kolothum err = iort_register_domain_token(its_entry->translation_id, res.start, 41028b4282e6SShameer Kolothum dom_handle); 41033f010cf1STomasz Nowicki if (err) { 41043f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", 41053f010cf1STomasz Nowicki &res.start, its_entry->translation_id); 41063f010cf1STomasz Nowicki goto dom_err; 41073f010cf1STomasz Nowicki } 41083f010cf1STomasz Nowicki 4109dbd2b826SGanapatrao Kulkarni err = its_probe_one(&res, dom_handle, 4110dbd2b826SGanapatrao Kulkarni acpi_get_its_numa_node(its_entry->translation_id)); 41113f010cf1STomasz Nowicki if (!err) 41123f010cf1STomasz Nowicki return 0; 41133f010cf1STomasz Nowicki 41143f010cf1STomasz Nowicki iort_deregister_domain_token(its_entry->translation_id); 41153f010cf1STomasz Nowicki dom_err: 41163f010cf1STomasz Nowicki irq_domain_free_fwnode(dom_handle); 41173f010cf1STomasz Nowicki return err; 41183f010cf1STomasz Nowicki } 41193f010cf1STomasz Nowicki 41203f010cf1STomasz Nowicki static void __init its_acpi_probe(void) 41213f010cf1STomasz Nowicki { 4122dbd2b826SGanapatrao Kulkarni acpi_table_parse_srat_its(); 41233f010cf1STomasz Nowicki acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, 41243f010cf1STomasz Nowicki gic_acpi_parse_madt_its, 0); 4125fdf6e7a8SHanjun Guo acpi_its_srat_maps_free(); 41263f010cf1STomasz Nowicki } 41273f010cf1STomasz Nowicki #else 41283f010cf1STomasz Nowicki static void __init its_acpi_probe(void) { } 41293f010cf1STomasz Nowicki #endif 41303f010cf1STomasz Nowicki 4131db40f0a7STomasz Nowicki int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, 4132db40f0a7STomasz Nowicki struct irq_domain *parent_domain) 4133db40f0a7STomasz Nowicki { 4134db40f0a7STomasz Nowicki struct device_node *of_node; 41358fff27aeSMarc Zyngier struct its_node *its; 41368fff27aeSMarc Zyngier bool has_v4 = false; 41378fff27aeSMarc Zyngier int err; 4138db40f0a7STomasz Nowicki 4139db40f0a7STomasz Nowicki its_parent = parent_domain; 4140db40f0a7STomasz Nowicki of_node = to_of_node(handle); 4141db40f0a7STomasz Nowicki if (of_node) 4142db40f0a7STomasz Nowicki its_of_probe(of_node); 4143db40f0a7STomasz Nowicki else 41443f010cf1STomasz Nowicki its_acpi_probe(); 4145db40f0a7STomasz Nowicki 41464c21f3c2SMarc Zyngier if (list_empty(&its_nodes)) { 41474c21f3c2SMarc Zyngier pr_warn("ITS: No ITS available, not enabling LPIs\n"); 41484c21f3c2SMarc Zyngier return -ENXIO; 41494c21f3c2SMarc Zyngier } 41504c21f3c2SMarc Zyngier 41514c21f3c2SMarc Zyngier gic_rdists = rdists; 415211e37d35SMarc Zyngier 415311e37d35SMarc Zyngier err = allocate_lpi_tables(); 41548fff27aeSMarc Zyngier if (err) 41558fff27aeSMarc Zyngier return err; 41568fff27aeSMarc Zyngier 41578fff27aeSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) 41580dd57fedSMarc Zyngier has_v4 |= is_v4(its); 41598fff27aeSMarc Zyngier 41608fff27aeSMarc Zyngier if (has_v4 & rdists->has_vlpis) { 41613d63cb53SMarc Zyngier if (its_init_vpe_domain() || 41623d63cb53SMarc Zyngier its_init_v4(parent_domain, &its_vpe_domain_ops)) { 41638fff27aeSMarc Zyngier rdists->has_vlpis = false; 41648fff27aeSMarc Zyngier pr_err("ITS: Disabling GICv4 support\n"); 41658fff27aeSMarc Zyngier } 41668fff27aeSMarc Zyngier } 41678fff27aeSMarc Zyngier 4168dba0bc7bSDerek Basehore register_syscore_ops(&its_syscore_ops); 4169dba0bc7bSDerek Basehore 41708fff27aeSMarc Zyngier return 0; 41714c21f3c2SMarc Zyngier } 4172