1cc2d3216SMarc Zyngier /* 2d7276b80SMarc Zyngier * Copyright (C) 2013-2017 ARM Limited, All Rights Reserved. 3cc2d3216SMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 4cc2d3216SMarc Zyngier * 5cc2d3216SMarc Zyngier * This program is free software; you can redistribute it and/or modify 6cc2d3216SMarc Zyngier * it under the terms of the GNU General Public License version 2 as 7cc2d3216SMarc Zyngier * published by the Free Software Foundation. 8cc2d3216SMarc Zyngier * 9cc2d3216SMarc Zyngier * This program is distributed in the hope that it will be useful, 10cc2d3216SMarc Zyngier * but WITHOUT ANY WARRANTY; without even the implied warranty of 11cc2d3216SMarc Zyngier * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12cc2d3216SMarc Zyngier * GNU General Public License for more details. 13cc2d3216SMarc Zyngier * 14cc2d3216SMarc Zyngier * You should have received a copy of the GNU General Public License 15cc2d3216SMarc Zyngier * along with this program. If not, see <http://www.gnu.org/licenses/>. 16cc2d3216SMarc Zyngier */ 17cc2d3216SMarc Zyngier 183f010cf1STomasz Nowicki #include <linux/acpi.h> 198d3554b8SHanjun Guo #include <linux/acpi_iort.h> 20cc2d3216SMarc Zyngier #include <linux/bitmap.h> 21cc2d3216SMarc Zyngier #include <linux/cpu.h> 22cc2d3216SMarc Zyngier #include <linux/delay.h> 2344bb7e24SRobin Murphy #include <linux/dma-iommu.h> 24cc2d3216SMarc Zyngier #include <linux/interrupt.h> 253f010cf1STomasz Nowicki #include <linux/irqdomain.h> 26cc2d3216SMarc Zyngier #include <linux/log2.h> 27cc2d3216SMarc Zyngier #include <linux/mm.h> 28cc2d3216SMarc Zyngier #include <linux/msi.h> 29cc2d3216SMarc Zyngier #include <linux/of.h> 30cc2d3216SMarc Zyngier #include <linux/of_address.h> 31cc2d3216SMarc Zyngier #include <linux/of_irq.h> 32cc2d3216SMarc Zyngier #include <linux/of_pci.h> 33cc2d3216SMarc Zyngier #include <linux/of_platform.h> 34cc2d3216SMarc Zyngier #include <linux/percpu.h> 35cc2d3216SMarc Zyngier #include <linux/slab.h> 36cc2d3216SMarc Zyngier 3741a83e06SJoel Porquet #include <linux/irqchip.h> 38cc2d3216SMarc Zyngier #include <linux/irqchip/arm-gic-v3.h> 39c808eea8SMarc Zyngier #include <linux/irqchip/arm-gic-v4.h> 40cc2d3216SMarc Zyngier 41cc2d3216SMarc Zyngier #include <asm/cputype.h> 42cc2d3216SMarc Zyngier #include <asm/exception.h> 43cc2d3216SMarc Zyngier 4467510ccaSRobert Richter #include "irq-gic-common.h" 4567510ccaSRobert Richter 4694100970SRobert Richter #define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) 4794100970SRobert Richter #define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) 48fbf8f40eSGanapatrao Kulkarni #define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2) 49cc2d3216SMarc Zyngier 50c48ed51cSMarc Zyngier #define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0) 51c48ed51cSMarc Zyngier 52a13b0404SMarc Zyngier static u32 lpi_id_bits; 53a13b0404SMarc Zyngier 54a13b0404SMarc Zyngier /* 55a13b0404SMarc Zyngier * We allocate memory for PROPBASE to cover 2 ^ lpi_id_bits LPIs to 56a13b0404SMarc Zyngier * deal with (one configuration byte per interrupt). PENDBASE has to 57a13b0404SMarc Zyngier * be 64kB aligned (one bit per LPI, plus 8192 bits for SPI/PPI/SGI). 58a13b0404SMarc Zyngier */ 59a13b0404SMarc Zyngier #define LPI_NRBITS lpi_id_bits 60a13b0404SMarc Zyngier #define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K) 61a13b0404SMarc Zyngier #define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K) 62a13b0404SMarc Zyngier 63a13b0404SMarc Zyngier #define LPI_PROP_DEFAULT_PRIO 0xa0 64a13b0404SMarc Zyngier 65cc2d3216SMarc Zyngier /* 66cc2d3216SMarc Zyngier * Collection structure - just an ID, and a redistributor address to 67cc2d3216SMarc Zyngier * ping. We use one per CPU as a bag of interrupts assigned to this 68cc2d3216SMarc Zyngier * CPU. 69cc2d3216SMarc Zyngier */ 70cc2d3216SMarc Zyngier struct its_collection { 71cc2d3216SMarc Zyngier u64 target_address; 72cc2d3216SMarc Zyngier u16 col_id; 73cc2d3216SMarc Zyngier }; 74cc2d3216SMarc Zyngier 75cc2d3216SMarc Zyngier /* 769347359aSShanker Donthineni * The ITS_BASER structure - contains memory information, cached 779347359aSShanker Donthineni * value of BASER register configuration and ITS page size. 78466b7d16SShanker Donthineni */ 79466b7d16SShanker Donthineni struct its_baser { 80466b7d16SShanker Donthineni void *base; 81466b7d16SShanker Donthineni u64 val; 82466b7d16SShanker Donthineni u32 order; 839347359aSShanker Donthineni u32 psz; 84466b7d16SShanker Donthineni }; 85466b7d16SShanker Donthineni 86466b7d16SShanker Donthineni /* 87cc2d3216SMarc Zyngier * The ITS structure - contains most of the infrastructure, with the 88841514abSMarc Zyngier * top-level MSI domain, the command queue, the collections, and the 89841514abSMarc Zyngier * list of devices writing to it. 90cc2d3216SMarc Zyngier */ 91cc2d3216SMarc Zyngier struct its_node { 92cc2d3216SMarc Zyngier raw_spinlock_t lock; 93cc2d3216SMarc Zyngier struct list_head entry; 94cc2d3216SMarc Zyngier void __iomem *base; 95db40f0a7STomasz Nowicki phys_addr_t phys_base; 96cc2d3216SMarc Zyngier struct its_cmd_block *cmd_base; 97cc2d3216SMarc Zyngier struct its_cmd_block *cmd_write; 98466b7d16SShanker Donthineni struct its_baser tables[GITS_BASER_NR_REGS]; 99cc2d3216SMarc Zyngier struct its_collection *collections; 100cc2d3216SMarc Zyngier struct list_head its_device_list; 101cc2d3216SMarc Zyngier u64 flags; 102cc2d3216SMarc Zyngier u32 ite_size; 103466b7d16SShanker Donthineni u32 device_ids; 104fbf8f40eSGanapatrao Kulkarni int numa_node; 1053dfa576bSMarc Zyngier bool is_v4; 106cc2d3216SMarc Zyngier }; 107cc2d3216SMarc Zyngier 108cc2d3216SMarc Zyngier #define ITS_ITT_ALIGN SZ_256 109cc2d3216SMarc Zyngier 1102eca0d6cSShanker Donthineni /* Convert page order to size in bytes */ 1112eca0d6cSShanker Donthineni #define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o)) 1122eca0d6cSShanker Donthineni 113591e5becSMarc Zyngier struct event_lpi_map { 114591e5becSMarc Zyngier unsigned long *lpi_map; 115591e5becSMarc Zyngier u16 *col_map; 116591e5becSMarc Zyngier irq_hw_number_t lpi_base; 117591e5becSMarc Zyngier int nr_lpis; 118d011e4e6SMarc Zyngier struct mutex vlpi_lock; 119d011e4e6SMarc Zyngier struct its_vm *vm; 120d011e4e6SMarc Zyngier struct its_vlpi_map *vlpi_maps; 121d011e4e6SMarc Zyngier int nr_vlpis; 122591e5becSMarc Zyngier }; 123591e5becSMarc Zyngier 124cc2d3216SMarc Zyngier /* 125d011e4e6SMarc Zyngier * The ITS view of a device - belongs to an ITS, owns an interrupt 126d011e4e6SMarc Zyngier * translation table, and a list of interrupts. If it some of its 127d011e4e6SMarc Zyngier * LPIs are injected into a guest (GICv4), the event_map.vm field 128d011e4e6SMarc Zyngier * indicates which one. 129cc2d3216SMarc Zyngier */ 130cc2d3216SMarc Zyngier struct its_device { 131cc2d3216SMarc Zyngier struct list_head entry; 132cc2d3216SMarc Zyngier struct its_node *its; 133591e5becSMarc Zyngier struct event_lpi_map event_map; 134cc2d3216SMarc Zyngier void *itt; 135cc2d3216SMarc Zyngier u32 nr_ites; 136cc2d3216SMarc Zyngier u32 device_id; 137cc2d3216SMarc Zyngier }; 138cc2d3216SMarc Zyngier 1391ac19ca6SMarc Zyngier static LIST_HEAD(its_nodes); 1401ac19ca6SMarc Zyngier static DEFINE_SPINLOCK(its_lock); 1411ac19ca6SMarc Zyngier static struct rdists *gic_rdists; 142db40f0a7STomasz Nowicki static struct irq_domain *its_parent; 1431ac19ca6SMarc Zyngier 1443dfa576bSMarc Zyngier /* 1453dfa576bSMarc Zyngier * We have a maximum number of 16 ITSs in the whole system if we're 1463dfa576bSMarc Zyngier * using the ITSList mechanism 1473dfa576bSMarc Zyngier */ 1483dfa576bSMarc Zyngier #define ITS_LIST_MAX 16 1493dfa576bSMarc Zyngier 1503dfa576bSMarc Zyngier static unsigned long its_list_map; 1513171a47aSMarc Zyngier static u16 vmovp_seq_num; 1523171a47aSMarc Zyngier static DEFINE_RAW_SPINLOCK(vmovp_lock); 1533171a47aSMarc Zyngier 1547d75bbb4SMarc Zyngier static DEFINE_IDA(its_vpeid_ida); 1553dfa576bSMarc Zyngier 1561ac19ca6SMarc Zyngier #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) 1571ac19ca6SMarc Zyngier #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) 158e643d803SMarc Zyngier #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) 1591ac19ca6SMarc Zyngier 160591e5becSMarc Zyngier static struct its_collection *dev_event_to_col(struct its_device *its_dev, 161591e5becSMarc Zyngier u32 event) 162591e5becSMarc Zyngier { 163591e5becSMarc Zyngier struct its_node *its = its_dev->its; 164591e5becSMarc Zyngier 165591e5becSMarc Zyngier return its->collections + its_dev->event_map.col_map[event]; 166591e5becSMarc Zyngier } 167591e5becSMarc Zyngier 168cc2d3216SMarc Zyngier /* 169cc2d3216SMarc Zyngier * ITS command descriptors - parameters to be encoded in a command 170cc2d3216SMarc Zyngier * block. 171cc2d3216SMarc Zyngier */ 172cc2d3216SMarc Zyngier struct its_cmd_desc { 173cc2d3216SMarc Zyngier union { 174cc2d3216SMarc Zyngier struct { 175cc2d3216SMarc Zyngier struct its_device *dev; 176cc2d3216SMarc Zyngier u32 event_id; 177cc2d3216SMarc Zyngier } its_inv_cmd; 178cc2d3216SMarc Zyngier 179cc2d3216SMarc Zyngier struct { 180cc2d3216SMarc Zyngier struct its_device *dev; 181cc2d3216SMarc Zyngier u32 event_id; 1828d85dcedSMarc Zyngier } its_clear_cmd; 1838d85dcedSMarc Zyngier 1848d85dcedSMarc Zyngier struct { 1858d85dcedSMarc Zyngier struct its_device *dev; 1868d85dcedSMarc Zyngier u32 event_id; 187cc2d3216SMarc Zyngier } its_int_cmd; 188cc2d3216SMarc Zyngier 189cc2d3216SMarc Zyngier struct { 190cc2d3216SMarc Zyngier struct its_device *dev; 191cc2d3216SMarc Zyngier int valid; 192cc2d3216SMarc Zyngier } its_mapd_cmd; 193cc2d3216SMarc Zyngier 194cc2d3216SMarc Zyngier struct { 195cc2d3216SMarc Zyngier struct its_collection *col; 196cc2d3216SMarc Zyngier int valid; 197cc2d3216SMarc Zyngier } its_mapc_cmd; 198cc2d3216SMarc Zyngier 199cc2d3216SMarc Zyngier struct { 200cc2d3216SMarc Zyngier struct its_device *dev; 201cc2d3216SMarc Zyngier u32 phys_id; 202cc2d3216SMarc Zyngier u32 event_id; 2036a25ad3aSMarc Zyngier } its_mapti_cmd; 204cc2d3216SMarc Zyngier 205cc2d3216SMarc Zyngier struct { 206cc2d3216SMarc Zyngier struct its_device *dev; 207cc2d3216SMarc Zyngier struct its_collection *col; 208591e5becSMarc Zyngier u32 event_id; 209cc2d3216SMarc Zyngier } its_movi_cmd; 210cc2d3216SMarc Zyngier 211cc2d3216SMarc Zyngier struct { 212cc2d3216SMarc Zyngier struct its_device *dev; 213cc2d3216SMarc Zyngier u32 event_id; 214cc2d3216SMarc Zyngier } its_discard_cmd; 215cc2d3216SMarc Zyngier 216cc2d3216SMarc Zyngier struct { 217cc2d3216SMarc Zyngier struct its_collection *col; 218cc2d3216SMarc Zyngier } its_invall_cmd; 219d011e4e6SMarc Zyngier 220d011e4e6SMarc Zyngier struct { 221d011e4e6SMarc Zyngier struct its_vpe *vpe; 222eb78192bSMarc Zyngier } its_vinvall_cmd; 223eb78192bSMarc Zyngier 224eb78192bSMarc Zyngier struct { 225eb78192bSMarc Zyngier struct its_vpe *vpe; 226eb78192bSMarc Zyngier struct its_collection *col; 227eb78192bSMarc Zyngier bool valid; 228eb78192bSMarc Zyngier } its_vmapp_cmd; 229eb78192bSMarc Zyngier 230eb78192bSMarc Zyngier struct { 231eb78192bSMarc Zyngier struct its_vpe *vpe; 232d011e4e6SMarc Zyngier struct its_device *dev; 233d011e4e6SMarc Zyngier u32 virt_id; 234d011e4e6SMarc Zyngier u32 event_id; 235d011e4e6SMarc Zyngier bool db_enabled; 236d011e4e6SMarc Zyngier } its_vmapti_cmd; 237d011e4e6SMarc Zyngier 238d011e4e6SMarc Zyngier struct { 239d011e4e6SMarc Zyngier struct its_vpe *vpe; 240d011e4e6SMarc Zyngier struct its_device *dev; 241d011e4e6SMarc Zyngier u32 event_id; 242d011e4e6SMarc Zyngier bool db_enabled; 243d011e4e6SMarc Zyngier } its_vmovi_cmd; 2443171a47aSMarc Zyngier 2453171a47aSMarc Zyngier struct { 2463171a47aSMarc Zyngier struct its_vpe *vpe; 2473171a47aSMarc Zyngier struct its_collection *col; 2483171a47aSMarc Zyngier u16 seq_num; 2493171a47aSMarc Zyngier u16 its_list; 2503171a47aSMarc Zyngier } its_vmovp_cmd; 251cc2d3216SMarc Zyngier }; 252cc2d3216SMarc Zyngier }; 253cc2d3216SMarc Zyngier 254cc2d3216SMarc Zyngier /* 255cc2d3216SMarc Zyngier * The ITS command block, which is what the ITS actually parses. 256cc2d3216SMarc Zyngier */ 257cc2d3216SMarc Zyngier struct its_cmd_block { 258cc2d3216SMarc Zyngier u64 raw_cmd[4]; 259cc2d3216SMarc Zyngier }; 260cc2d3216SMarc Zyngier 261cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_SZ SZ_64K 262cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) 263cc2d3216SMarc Zyngier 264cc2d3216SMarc Zyngier typedef struct its_collection *(*its_cmd_builder_t)(struct its_cmd_block *, 265cc2d3216SMarc Zyngier struct its_cmd_desc *); 266cc2d3216SMarc Zyngier 267d011e4e6SMarc Zyngier typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_cmd_block *, 268d011e4e6SMarc Zyngier struct its_cmd_desc *); 269d011e4e6SMarc Zyngier 2704d36f136SMarc Zyngier static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) 2714d36f136SMarc Zyngier { 2724d36f136SMarc Zyngier u64 mask = GENMASK_ULL(h, l); 2734d36f136SMarc Zyngier *raw_cmd &= ~mask; 2744d36f136SMarc Zyngier *raw_cmd |= (val << l) & mask; 2754d36f136SMarc Zyngier } 2764d36f136SMarc Zyngier 277cc2d3216SMarc Zyngier static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) 278cc2d3216SMarc Zyngier { 2794d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); 280cc2d3216SMarc Zyngier } 281cc2d3216SMarc Zyngier 282cc2d3216SMarc Zyngier static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) 283cc2d3216SMarc Zyngier { 2844d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); 285cc2d3216SMarc Zyngier } 286cc2d3216SMarc Zyngier 287cc2d3216SMarc Zyngier static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) 288cc2d3216SMarc Zyngier { 2894d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); 290cc2d3216SMarc Zyngier } 291cc2d3216SMarc Zyngier 292cc2d3216SMarc Zyngier static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) 293cc2d3216SMarc Zyngier { 2944d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); 295cc2d3216SMarc Zyngier } 296cc2d3216SMarc Zyngier 297cc2d3216SMarc Zyngier static void its_encode_size(struct its_cmd_block *cmd, u8 size) 298cc2d3216SMarc Zyngier { 2994d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); 300cc2d3216SMarc Zyngier } 301cc2d3216SMarc Zyngier 302cc2d3216SMarc Zyngier static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) 303cc2d3216SMarc Zyngier { 3044d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 50, 8); 305cc2d3216SMarc Zyngier } 306cc2d3216SMarc Zyngier 307cc2d3216SMarc Zyngier static void its_encode_valid(struct its_cmd_block *cmd, int valid) 308cc2d3216SMarc Zyngier { 3094d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); 310cc2d3216SMarc Zyngier } 311cc2d3216SMarc Zyngier 312cc2d3216SMarc Zyngier static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) 313cc2d3216SMarc Zyngier { 3144d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 50, 16); 315cc2d3216SMarc Zyngier } 316cc2d3216SMarc Zyngier 317cc2d3216SMarc Zyngier static void its_encode_collection(struct its_cmd_block *cmd, u16 col) 318cc2d3216SMarc Zyngier { 3194d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); 320cc2d3216SMarc Zyngier } 321cc2d3216SMarc Zyngier 322d011e4e6SMarc Zyngier static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) 323d011e4e6SMarc Zyngier { 324d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); 325d011e4e6SMarc Zyngier } 326d011e4e6SMarc Zyngier 327d011e4e6SMarc Zyngier static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) 328d011e4e6SMarc Zyngier { 329d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); 330d011e4e6SMarc Zyngier } 331d011e4e6SMarc Zyngier 332d011e4e6SMarc Zyngier static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) 333d011e4e6SMarc Zyngier { 334d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); 335d011e4e6SMarc Zyngier } 336d011e4e6SMarc Zyngier 337d011e4e6SMarc Zyngier static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) 338d011e4e6SMarc Zyngier { 339d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); 340d011e4e6SMarc Zyngier } 341d011e4e6SMarc Zyngier 3423171a47aSMarc Zyngier static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) 3433171a47aSMarc Zyngier { 3443171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); 3453171a47aSMarc Zyngier } 3463171a47aSMarc Zyngier 3473171a47aSMarc Zyngier static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) 3483171a47aSMarc Zyngier { 3493171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); 3503171a47aSMarc Zyngier } 3513171a47aSMarc Zyngier 352eb78192bSMarc Zyngier static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) 353eb78192bSMarc Zyngier { 354eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 50, 16); 355eb78192bSMarc Zyngier } 356eb78192bSMarc Zyngier 357eb78192bSMarc Zyngier static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) 358eb78192bSMarc Zyngier { 359eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); 360eb78192bSMarc Zyngier } 361eb78192bSMarc Zyngier 362cc2d3216SMarc Zyngier static inline void its_fixup_cmd(struct its_cmd_block *cmd) 363cc2d3216SMarc Zyngier { 364cc2d3216SMarc Zyngier /* Let's fixup BE commands */ 365cc2d3216SMarc Zyngier cmd->raw_cmd[0] = cpu_to_le64(cmd->raw_cmd[0]); 366cc2d3216SMarc Zyngier cmd->raw_cmd[1] = cpu_to_le64(cmd->raw_cmd[1]); 367cc2d3216SMarc Zyngier cmd->raw_cmd[2] = cpu_to_le64(cmd->raw_cmd[2]); 368cc2d3216SMarc Zyngier cmd->raw_cmd[3] = cpu_to_le64(cmd->raw_cmd[3]); 369cc2d3216SMarc Zyngier } 370cc2d3216SMarc Zyngier 371cc2d3216SMarc Zyngier static struct its_collection *its_build_mapd_cmd(struct its_cmd_block *cmd, 372cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 373cc2d3216SMarc Zyngier { 374cc2d3216SMarc Zyngier unsigned long itt_addr; 375c8481267SMarc Zyngier u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); 376cc2d3216SMarc Zyngier 377cc2d3216SMarc Zyngier itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); 378cc2d3216SMarc Zyngier itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); 379cc2d3216SMarc Zyngier 380cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPD); 381cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); 382cc2d3216SMarc Zyngier its_encode_size(cmd, size - 1); 383cc2d3216SMarc Zyngier its_encode_itt(cmd, itt_addr); 384cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapd_cmd.valid); 385cc2d3216SMarc Zyngier 386cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 387cc2d3216SMarc Zyngier 388591e5becSMarc Zyngier return NULL; 389cc2d3216SMarc Zyngier } 390cc2d3216SMarc Zyngier 391cc2d3216SMarc Zyngier static struct its_collection *its_build_mapc_cmd(struct its_cmd_block *cmd, 392cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 393cc2d3216SMarc Zyngier { 394cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPC); 395cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 396cc2d3216SMarc Zyngier its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); 397cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapc_cmd.valid); 398cc2d3216SMarc Zyngier 399cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 400cc2d3216SMarc Zyngier 401cc2d3216SMarc Zyngier return desc->its_mapc_cmd.col; 402cc2d3216SMarc Zyngier } 403cc2d3216SMarc Zyngier 4046a25ad3aSMarc Zyngier static struct its_collection *its_build_mapti_cmd(struct its_cmd_block *cmd, 405cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 406cc2d3216SMarc Zyngier { 407591e5becSMarc Zyngier struct its_collection *col; 408591e5becSMarc Zyngier 4096a25ad3aSMarc Zyngier col = dev_event_to_col(desc->its_mapti_cmd.dev, 4106a25ad3aSMarc Zyngier desc->its_mapti_cmd.event_id); 411591e5becSMarc Zyngier 4126a25ad3aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPTI); 4136a25ad3aSMarc Zyngier its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); 4146a25ad3aSMarc Zyngier its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); 4156a25ad3aSMarc Zyngier its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); 416591e5becSMarc Zyngier its_encode_collection(cmd, col->col_id); 417cc2d3216SMarc Zyngier 418cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 419cc2d3216SMarc Zyngier 420591e5becSMarc Zyngier return col; 421cc2d3216SMarc Zyngier } 422cc2d3216SMarc Zyngier 423cc2d3216SMarc Zyngier static struct its_collection *its_build_movi_cmd(struct its_cmd_block *cmd, 424cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 425cc2d3216SMarc Zyngier { 426591e5becSMarc Zyngier struct its_collection *col; 427591e5becSMarc Zyngier 428591e5becSMarc Zyngier col = dev_event_to_col(desc->its_movi_cmd.dev, 429591e5becSMarc Zyngier desc->its_movi_cmd.event_id); 430591e5becSMarc Zyngier 431cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MOVI); 432cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); 433591e5becSMarc Zyngier its_encode_event_id(cmd, desc->its_movi_cmd.event_id); 434cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); 435cc2d3216SMarc Zyngier 436cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 437cc2d3216SMarc Zyngier 438591e5becSMarc Zyngier return col; 439cc2d3216SMarc Zyngier } 440cc2d3216SMarc Zyngier 441cc2d3216SMarc Zyngier static struct its_collection *its_build_discard_cmd(struct its_cmd_block *cmd, 442cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 443cc2d3216SMarc Zyngier { 444591e5becSMarc Zyngier struct its_collection *col; 445591e5becSMarc Zyngier 446591e5becSMarc Zyngier col = dev_event_to_col(desc->its_discard_cmd.dev, 447591e5becSMarc Zyngier desc->its_discard_cmd.event_id); 448591e5becSMarc Zyngier 449cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_DISCARD); 450cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); 451cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_discard_cmd.event_id); 452cc2d3216SMarc Zyngier 453cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 454cc2d3216SMarc Zyngier 455591e5becSMarc Zyngier return col; 456cc2d3216SMarc Zyngier } 457cc2d3216SMarc Zyngier 458cc2d3216SMarc Zyngier static struct its_collection *its_build_inv_cmd(struct its_cmd_block *cmd, 459cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 460cc2d3216SMarc Zyngier { 461591e5becSMarc Zyngier struct its_collection *col; 462591e5becSMarc Zyngier 463591e5becSMarc Zyngier col = dev_event_to_col(desc->its_inv_cmd.dev, 464591e5becSMarc Zyngier desc->its_inv_cmd.event_id); 465591e5becSMarc Zyngier 466cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 467cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 468cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 469cc2d3216SMarc Zyngier 470cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 471cc2d3216SMarc Zyngier 472591e5becSMarc Zyngier return col; 473cc2d3216SMarc Zyngier } 474cc2d3216SMarc Zyngier 4758d85dcedSMarc Zyngier static struct its_collection *its_build_int_cmd(struct its_cmd_block *cmd, 4768d85dcedSMarc Zyngier struct its_cmd_desc *desc) 4778d85dcedSMarc Zyngier { 4788d85dcedSMarc Zyngier struct its_collection *col; 4798d85dcedSMarc Zyngier 4808d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_int_cmd.dev, 4818d85dcedSMarc Zyngier desc->its_int_cmd.event_id); 4828d85dcedSMarc Zyngier 4838d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 4848d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 4858d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 4868d85dcedSMarc Zyngier 4878d85dcedSMarc Zyngier its_fixup_cmd(cmd); 4888d85dcedSMarc Zyngier 4898d85dcedSMarc Zyngier return col; 4908d85dcedSMarc Zyngier } 4918d85dcedSMarc Zyngier 4928d85dcedSMarc Zyngier static struct its_collection *its_build_clear_cmd(struct its_cmd_block *cmd, 4938d85dcedSMarc Zyngier struct its_cmd_desc *desc) 4948d85dcedSMarc Zyngier { 4958d85dcedSMarc Zyngier struct its_collection *col; 4968d85dcedSMarc Zyngier 4978d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_clear_cmd.dev, 4988d85dcedSMarc Zyngier desc->its_clear_cmd.event_id); 4998d85dcedSMarc Zyngier 5008d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 5018d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 5028d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 5038d85dcedSMarc Zyngier 5048d85dcedSMarc Zyngier its_fixup_cmd(cmd); 5058d85dcedSMarc Zyngier 5068d85dcedSMarc Zyngier return col; 5078d85dcedSMarc Zyngier } 5088d85dcedSMarc Zyngier 509cc2d3216SMarc Zyngier static struct its_collection *its_build_invall_cmd(struct its_cmd_block *cmd, 510cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 511cc2d3216SMarc Zyngier { 512cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INVALL); 513cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 514cc2d3216SMarc Zyngier 515cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 516cc2d3216SMarc Zyngier 517cc2d3216SMarc Zyngier return NULL; 518cc2d3216SMarc Zyngier } 519cc2d3216SMarc Zyngier 520eb78192bSMarc Zyngier static struct its_vpe *its_build_vinvall_cmd(struct its_cmd_block *cmd, 521eb78192bSMarc Zyngier struct its_cmd_desc *desc) 522eb78192bSMarc Zyngier { 523eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VINVALL); 524eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); 525eb78192bSMarc Zyngier 526eb78192bSMarc Zyngier its_fixup_cmd(cmd); 527eb78192bSMarc Zyngier 528eb78192bSMarc Zyngier return desc->its_vinvall_cmd.vpe; 529eb78192bSMarc Zyngier } 530eb78192bSMarc Zyngier 531eb78192bSMarc Zyngier static struct its_vpe *its_build_vmapp_cmd(struct its_cmd_block *cmd, 532eb78192bSMarc Zyngier struct its_cmd_desc *desc) 533eb78192bSMarc Zyngier { 534eb78192bSMarc Zyngier unsigned long vpt_addr; 535eb78192bSMarc Zyngier 536eb78192bSMarc Zyngier vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); 537eb78192bSMarc Zyngier 538eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPP); 539eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); 540eb78192bSMarc Zyngier its_encode_valid(cmd, desc->its_vmapp_cmd.valid); 541eb78192bSMarc Zyngier its_encode_target(cmd, desc->its_vmapp_cmd.col->target_address); 542eb78192bSMarc Zyngier its_encode_vpt_addr(cmd, vpt_addr); 543eb78192bSMarc Zyngier its_encode_vpt_size(cmd, LPI_NRBITS - 1); 544eb78192bSMarc Zyngier 545eb78192bSMarc Zyngier its_fixup_cmd(cmd); 546eb78192bSMarc Zyngier 547eb78192bSMarc Zyngier return desc->its_vmapp_cmd.vpe; 548eb78192bSMarc Zyngier } 549eb78192bSMarc Zyngier 550d011e4e6SMarc Zyngier static struct its_vpe *its_build_vmapti_cmd(struct its_cmd_block *cmd, 551d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 552d011e4e6SMarc Zyngier { 553d011e4e6SMarc Zyngier u32 db; 554d011e4e6SMarc Zyngier 555d011e4e6SMarc Zyngier if (desc->its_vmapti_cmd.db_enabled) 556d011e4e6SMarc Zyngier db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; 557d011e4e6SMarc Zyngier else 558d011e4e6SMarc Zyngier db = 1023; 559d011e4e6SMarc Zyngier 560d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPTI); 561d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); 562d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); 563d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); 564d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 565d011e4e6SMarc Zyngier its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); 566d011e4e6SMarc Zyngier 567d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 568d011e4e6SMarc Zyngier 569d011e4e6SMarc Zyngier return desc->its_vmapti_cmd.vpe; 570d011e4e6SMarc Zyngier } 571d011e4e6SMarc Zyngier 572d011e4e6SMarc Zyngier static struct its_vpe *its_build_vmovi_cmd(struct its_cmd_block *cmd, 573d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 574d011e4e6SMarc Zyngier { 575d011e4e6SMarc Zyngier u32 db; 576d011e4e6SMarc Zyngier 577d011e4e6SMarc Zyngier if (desc->its_vmovi_cmd.db_enabled) 578d011e4e6SMarc Zyngier db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; 579d011e4e6SMarc Zyngier else 580d011e4e6SMarc Zyngier db = 1023; 581d011e4e6SMarc Zyngier 582d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVI); 583d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); 584d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); 585d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); 586d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 587d011e4e6SMarc Zyngier its_encode_db_valid(cmd, true); 588d011e4e6SMarc Zyngier 589d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 590d011e4e6SMarc Zyngier 591d011e4e6SMarc Zyngier return desc->its_vmovi_cmd.vpe; 592d011e4e6SMarc Zyngier } 593d011e4e6SMarc Zyngier 5943171a47aSMarc Zyngier static struct its_vpe *its_build_vmovp_cmd(struct its_cmd_block *cmd, 5953171a47aSMarc Zyngier struct its_cmd_desc *desc) 5963171a47aSMarc Zyngier { 5973171a47aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVP); 5983171a47aSMarc Zyngier its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); 5993171a47aSMarc Zyngier its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); 6003171a47aSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); 6013171a47aSMarc Zyngier its_encode_target(cmd, desc->its_vmovp_cmd.col->target_address); 6023171a47aSMarc Zyngier 6033171a47aSMarc Zyngier its_fixup_cmd(cmd); 6043171a47aSMarc Zyngier 6053171a47aSMarc Zyngier return desc->its_vmovp_cmd.vpe; 6063171a47aSMarc Zyngier } 6073171a47aSMarc Zyngier 608cc2d3216SMarc Zyngier static u64 its_cmd_ptr_to_offset(struct its_node *its, 609cc2d3216SMarc Zyngier struct its_cmd_block *ptr) 610cc2d3216SMarc Zyngier { 611cc2d3216SMarc Zyngier return (ptr - its->cmd_base) * sizeof(*ptr); 612cc2d3216SMarc Zyngier } 613cc2d3216SMarc Zyngier 614cc2d3216SMarc Zyngier static int its_queue_full(struct its_node *its) 615cc2d3216SMarc Zyngier { 616cc2d3216SMarc Zyngier int widx; 617cc2d3216SMarc Zyngier int ridx; 618cc2d3216SMarc Zyngier 619cc2d3216SMarc Zyngier widx = its->cmd_write - its->cmd_base; 620cc2d3216SMarc Zyngier ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); 621cc2d3216SMarc Zyngier 622cc2d3216SMarc Zyngier /* This is incredibly unlikely to happen, unless the ITS locks up. */ 623cc2d3216SMarc Zyngier if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) 624cc2d3216SMarc Zyngier return 1; 625cc2d3216SMarc Zyngier 626cc2d3216SMarc Zyngier return 0; 627cc2d3216SMarc Zyngier } 628cc2d3216SMarc Zyngier 629cc2d3216SMarc Zyngier static struct its_cmd_block *its_allocate_entry(struct its_node *its) 630cc2d3216SMarc Zyngier { 631cc2d3216SMarc Zyngier struct its_cmd_block *cmd; 632cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 633cc2d3216SMarc Zyngier 634cc2d3216SMarc Zyngier while (its_queue_full(its)) { 635cc2d3216SMarc Zyngier count--; 636cc2d3216SMarc Zyngier if (!count) { 637cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue not draining\n"); 638cc2d3216SMarc Zyngier return NULL; 639cc2d3216SMarc Zyngier } 640cc2d3216SMarc Zyngier cpu_relax(); 641cc2d3216SMarc Zyngier udelay(1); 642cc2d3216SMarc Zyngier } 643cc2d3216SMarc Zyngier 644cc2d3216SMarc Zyngier cmd = its->cmd_write++; 645cc2d3216SMarc Zyngier 646cc2d3216SMarc Zyngier /* Handle queue wrapping */ 647cc2d3216SMarc Zyngier if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) 648cc2d3216SMarc Zyngier its->cmd_write = its->cmd_base; 649cc2d3216SMarc Zyngier 65034d677a9SMarc Zyngier /* Clear command */ 65134d677a9SMarc Zyngier cmd->raw_cmd[0] = 0; 65234d677a9SMarc Zyngier cmd->raw_cmd[1] = 0; 65334d677a9SMarc Zyngier cmd->raw_cmd[2] = 0; 65434d677a9SMarc Zyngier cmd->raw_cmd[3] = 0; 65534d677a9SMarc Zyngier 656cc2d3216SMarc Zyngier return cmd; 657cc2d3216SMarc Zyngier } 658cc2d3216SMarc Zyngier 659cc2d3216SMarc Zyngier static struct its_cmd_block *its_post_commands(struct its_node *its) 660cc2d3216SMarc Zyngier { 661cc2d3216SMarc Zyngier u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); 662cc2d3216SMarc Zyngier 663cc2d3216SMarc Zyngier writel_relaxed(wr, its->base + GITS_CWRITER); 664cc2d3216SMarc Zyngier 665cc2d3216SMarc Zyngier return its->cmd_write; 666cc2d3216SMarc Zyngier } 667cc2d3216SMarc Zyngier 668cc2d3216SMarc Zyngier static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) 669cc2d3216SMarc Zyngier { 670cc2d3216SMarc Zyngier /* 671cc2d3216SMarc Zyngier * Make sure the commands written to memory are observable by 672cc2d3216SMarc Zyngier * the ITS. 673cc2d3216SMarc Zyngier */ 674cc2d3216SMarc Zyngier if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) 675328191c0SVladimir Murzin gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); 676cc2d3216SMarc Zyngier else 677cc2d3216SMarc Zyngier dsb(ishst); 678cc2d3216SMarc Zyngier } 679cc2d3216SMarc Zyngier 680cc2d3216SMarc Zyngier static void its_wait_for_range_completion(struct its_node *its, 681cc2d3216SMarc Zyngier struct its_cmd_block *from, 682cc2d3216SMarc Zyngier struct its_cmd_block *to) 683cc2d3216SMarc Zyngier { 684cc2d3216SMarc Zyngier u64 rd_idx, from_idx, to_idx; 685cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 686cc2d3216SMarc Zyngier 687cc2d3216SMarc Zyngier from_idx = its_cmd_ptr_to_offset(its, from); 688cc2d3216SMarc Zyngier to_idx = its_cmd_ptr_to_offset(its, to); 689cc2d3216SMarc Zyngier 690cc2d3216SMarc Zyngier while (1) { 691cc2d3216SMarc Zyngier rd_idx = readl_relaxed(its->base + GITS_CREADR); 6929bdd8b1cSMarc Zyngier 6939bdd8b1cSMarc Zyngier /* Direct case */ 6949bdd8b1cSMarc Zyngier if (from_idx < to_idx && rd_idx >= to_idx) 6959bdd8b1cSMarc Zyngier break; 6969bdd8b1cSMarc Zyngier 6979bdd8b1cSMarc Zyngier /* Wrapped case */ 6989bdd8b1cSMarc Zyngier if (from_idx >= to_idx && rd_idx >= to_idx && rd_idx < from_idx) 699cc2d3216SMarc Zyngier break; 700cc2d3216SMarc Zyngier 701cc2d3216SMarc Zyngier count--; 702cc2d3216SMarc Zyngier if (!count) { 703cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue timeout\n"); 704cc2d3216SMarc Zyngier return; 705cc2d3216SMarc Zyngier } 706cc2d3216SMarc Zyngier cpu_relax(); 707cc2d3216SMarc Zyngier udelay(1); 708cc2d3216SMarc Zyngier } 709cc2d3216SMarc Zyngier } 710cc2d3216SMarc Zyngier 711e4f9094bSMarc Zyngier /* Warning, macro hell follows */ 712e4f9094bSMarc Zyngier #define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ 713e4f9094bSMarc Zyngier void name(struct its_node *its, \ 714e4f9094bSMarc Zyngier buildtype builder, \ 715e4f9094bSMarc Zyngier struct its_cmd_desc *desc) \ 716e4f9094bSMarc Zyngier { \ 717e4f9094bSMarc Zyngier struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ 718e4f9094bSMarc Zyngier synctype *sync_obj; \ 719e4f9094bSMarc Zyngier unsigned long flags; \ 720e4f9094bSMarc Zyngier \ 721e4f9094bSMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); \ 722e4f9094bSMarc Zyngier \ 723e4f9094bSMarc Zyngier cmd = its_allocate_entry(its); \ 724e4f9094bSMarc Zyngier if (!cmd) { /* We're soooooo screewed... */ \ 725e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 726e4f9094bSMarc Zyngier return; \ 727e4f9094bSMarc Zyngier } \ 728e4f9094bSMarc Zyngier sync_obj = builder(cmd, desc); \ 729e4f9094bSMarc Zyngier its_flush_cmd(its, cmd); \ 730e4f9094bSMarc Zyngier \ 731e4f9094bSMarc Zyngier if (sync_obj) { \ 732e4f9094bSMarc Zyngier sync_cmd = its_allocate_entry(its); \ 733e4f9094bSMarc Zyngier if (!sync_cmd) \ 734e4f9094bSMarc Zyngier goto post; \ 735e4f9094bSMarc Zyngier \ 736e4f9094bSMarc Zyngier buildfn(sync_cmd, sync_obj); \ 737e4f9094bSMarc Zyngier its_flush_cmd(its, sync_cmd); \ 738e4f9094bSMarc Zyngier } \ 739e4f9094bSMarc Zyngier \ 740e4f9094bSMarc Zyngier post: \ 741e4f9094bSMarc Zyngier next_cmd = its_post_commands(its); \ 742e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 743e4f9094bSMarc Zyngier \ 744e4f9094bSMarc Zyngier its_wait_for_range_completion(its, cmd, next_cmd); \ 745e4f9094bSMarc Zyngier } 746e4f9094bSMarc Zyngier 747e4f9094bSMarc Zyngier static void its_build_sync_cmd(struct its_cmd_block *sync_cmd, 748e4f9094bSMarc Zyngier struct its_collection *sync_col) 749cc2d3216SMarc Zyngier { 750cc2d3216SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_SYNC); 751cc2d3216SMarc Zyngier its_encode_target(sync_cmd, sync_col->target_address); 752e4f9094bSMarc Zyngier 753cc2d3216SMarc Zyngier its_fixup_cmd(sync_cmd); 754cc2d3216SMarc Zyngier } 755cc2d3216SMarc Zyngier 756e4f9094bSMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, 757e4f9094bSMarc Zyngier struct its_collection, its_build_sync_cmd) 758cc2d3216SMarc Zyngier 759d011e4e6SMarc Zyngier static void its_build_vsync_cmd(struct its_cmd_block *sync_cmd, 760d011e4e6SMarc Zyngier struct its_vpe *sync_vpe) 761d011e4e6SMarc Zyngier { 762d011e4e6SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); 763d011e4e6SMarc Zyngier its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); 764d011e4e6SMarc Zyngier 765d011e4e6SMarc Zyngier its_fixup_cmd(sync_cmd); 766d011e4e6SMarc Zyngier } 767d011e4e6SMarc Zyngier 768d011e4e6SMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, 769d011e4e6SMarc Zyngier struct its_vpe, its_build_vsync_cmd) 770d011e4e6SMarc Zyngier 7718d85dcedSMarc Zyngier static void its_send_int(struct its_device *dev, u32 event_id) 7728d85dcedSMarc Zyngier { 7738d85dcedSMarc Zyngier struct its_cmd_desc desc; 7748d85dcedSMarc Zyngier 7758d85dcedSMarc Zyngier desc.its_int_cmd.dev = dev; 7768d85dcedSMarc Zyngier desc.its_int_cmd.event_id = event_id; 7778d85dcedSMarc Zyngier 7788d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_int_cmd, &desc); 7798d85dcedSMarc Zyngier } 7808d85dcedSMarc Zyngier 7818d85dcedSMarc Zyngier static void its_send_clear(struct its_device *dev, u32 event_id) 7828d85dcedSMarc Zyngier { 7838d85dcedSMarc Zyngier struct its_cmd_desc desc; 7848d85dcedSMarc Zyngier 7858d85dcedSMarc Zyngier desc.its_clear_cmd.dev = dev; 7868d85dcedSMarc Zyngier desc.its_clear_cmd.event_id = event_id; 7878d85dcedSMarc Zyngier 7888d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_clear_cmd, &desc); 7898d85dcedSMarc Zyngier } 7908d85dcedSMarc Zyngier 791cc2d3216SMarc Zyngier static void its_send_inv(struct its_device *dev, u32 event_id) 792cc2d3216SMarc Zyngier { 793cc2d3216SMarc Zyngier struct its_cmd_desc desc; 794cc2d3216SMarc Zyngier 795cc2d3216SMarc Zyngier desc.its_inv_cmd.dev = dev; 796cc2d3216SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 797cc2d3216SMarc Zyngier 798cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_inv_cmd, &desc); 799cc2d3216SMarc Zyngier } 800cc2d3216SMarc Zyngier 801cc2d3216SMarc Zyngier static void its_send_mapd(struct its_device *dev, int valid) 802cc2d3216SMarc Zyngier { 803cc2d3216SMarc Zyngier struct its_cmd_desc desc; 804cc2d3216SMarc Zyngier 805cc2d3216SMarc Zyngier desc.its_mapd_cmd.dev = dev; 806cc2d3216SMarc Zyngier desc.its_mapd_cmd.valid = !!valid; 807cc2d3216SMarc Zyngier 808cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_mapd_cmd, &desc); 809cc2d3216SMarc Zyngier } 810cc2d3216SMarc Zyngier 811cc2d3216SMarc Zyngier static void its_send_mapc(struct its_node *its, struct its_collection *col, 812cc2d3216SMarc Zyngier int valid) 813cc2d3216SMarc Zyngier { 814cc2d3216SMarc Zyngier struct its_cmd_desc desc; 815cc2d3216SMarc Zyngier 816cc2d3216SMarc Zyngier desc.its_mapc_cmd.col = col; 817cc2d3216SMarc Zyngier desc.its_mapc_cmd.valid = !!valid; 818cc2d3216SMarc Zyngier 819cc2d3216SMarc Zyngier its_send_single_command(its, its_build_mapc_cmd, &desc); 820cc2d3216SMarc Zyngier } 821cc2d3216SMarc Zyngier 8226a25ad3aSMarc Zyngier static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) 823cc2d3216SMarc Zyngier { 824cc2d3216SMarc Zyngier struct its_cmd_desc desc; 825cc2d3216SMarc Zyngier 8266a25ad3aSMarc Zyngier desc.its_mapti_cmd.dev = dev; 8276a25ad3aSMarc Zyngier desc.its_mapti_cmd.phys_id = irq_id; 8286a25ad3aSMarc Zyngier desc.its_mapti_cmd.event_id = id; 829cc2d3216SMarc Zyngier 8306a25ad3aSMarc Zyngier its_send_single_command(dev->its, its_build_mapti_cmd, &desc); 831cc2d3216SMarc Zyngier } 832cc2d3216SMarc Zyngier 833cc2d3216SMarc Zyngier static void its_send_movi(struct its_device *dev, 834cc2d3216SMarc Zyngier struct its_collection *col, u32 id) 835cc2d3216SMarc Zyngier { 836cc2d3216SMarc Zyngier struct its_cmd_desc desc; 837cc2d3216SMarc Zyngier 838cc2d3216SMarc Zyngier desc.its_movi_cmd.dev = dev; 839cc2d3216SMarc Zyngier desc.its_movi_cmd.col = col; 840591e5becSMarc Zyngier desc.its_movi_cmd.event_id = id; 841cc2d3216SMarc Zyngier 842cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_movi_cmd, &desc); 843cc2d3216SMarc Zyngier } 844cc2d3216SMarc Zyngier 845cc2d3216SMarc Zyngier static void its_send_discard(struct its_device *dev, u32 id) 846cc2d3216SMarc Zyngier { 847cc2d3216SMarc Zyngier struct its_cmd_desc desc; 848cc2d3216SMarc Zyngier 849cc2d3216SMarc Zyngier desc.its_discard_cmd.dev = dev; 850cc2d3216SMarc Zyngier desc.its_discard_cmd.event_id = id; 851cc2d3216SMarc Zyngier 852cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_discard_cmd, &desc); 853cc2d3216SMarc Zyngier } 854cc2d3216SMarc Zyngier 855cc2d3216SMarc Zyngier static void its_send_invall(struct its_node *its, struct its_collection *col) 856cc2d3216SMarc Zyngier { 857cc2d3216SMarc Zyngier struct its_cmd_desc desc; 858cc2d3216SMarc Zyngier 859cc2d3216SMarc Zyngier desc.its_invall_cmd.col = col; 860cc2d3216SMarc Zyngier 861cc2d3216SMarc Zyngier its_send_single_command(its, its_build_invall_cmd, &desc); 862cc2d3216SMarc Zyngier } 863c48ed51cSMarc Zyngier 864d011e4e6SMarc Zyngier static void its_send_vmapti(struct its_device *dev, u32 id) 865d011e4e6SMarc Zyngier { 866d011e4e6SMarc Zyngier struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; 867d011e4e6SMarc Zyngier struct its_cmd_desc desc; 868d011e4e6SMarc Zyngier 869d011e4e6SMarc Zyngier desc.its_vmapti_cmd.vpe = map->vpe; 870d011e4e6SMarc Zyngier desc.its_vmapti_cmd.dev = dev; 871d011e4e6SMarc Zyngier desc.its_vmapti_cmd.virt_id = map->vintid; 872d011e4e6SMarc Zyngier desc.its_vmapti_cmd.event_id = id; 873d011e4e6SMarc Zyngier desc.its_vmapti_cmd.db_enabled = map->db_enabled; 874d011e4e6SMarc Zyngier 875d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); 876d011e4e6SMarc Zyngier } 877d011e4e6SMarc Zyngier 878d011e4e6SMarc Zyngier static void its_send_vmovi(struct its_device *dev, u32 id) 879d011e4e6SMarc Zyngier { 880d011e4e6SMarc Zyngier struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; 881d011e4e6SMarc Zyngier struct its_cmd_desc desc; 882d011e4e6SMarc Zyngier 883d011e4e6SMarc Zyngier desc.its_vmovi_cmd.vpe = map->vpe; 884d011e4e6SMarc Zyngier desc.its_vmovi_cmd.dev = dev; 885d011e4e6SMarc Zyngier desc.its_vmovi_cmd.event_id = id; 886d011e4e6SMarc Zyngier desc.its_vmovi_cmd.db_enabled = map->db_enabled; 887d011e4e6SMarc Zyngier 888d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); 889d011e4e6SMarc Zyngier } 890d011e4e6SMarc Zyngier 891eb78192bSMarc Zyngier static void its_send_vmapp(struct its_vpe *vpe, bool valid) 892eb78192bSMarc Zyngier { 893eb78192bSMarc Zyngier struct its_cmd_desc desc; 894eb78192bSMarc Zyngier struct its_node *its; 895eb78192bSMarc Zyngier 896eb78192bSMarc Zyngier desc.its_vmapp_cmd.vpe = vpe; 897eb78192bSMarc Zyngier desc.its_vmapp_cmd.valid = valid; 898eb78192bSMarc Zyngier 899eb78192bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 900eb78192bSMarc Zyngier if (!its->is_v4) 901eb78192bSMarc Zyngier continue; 902eb78192bSMarc Zyngier 903eb78192bSMarc Zyngier desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; 904eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); 905eb78192bSMarc Zyngier } 906eb78192bSMarc Zyngier } 907eb78192bSMarc Zyngier 9083171a47aSMarc Zyngier static void its_send_vmovp(struct its_vpe *vpe) 9093171a47aSMarc Zyngier { 9103171a47aSMarc Zyngier struct its_cmd_desc desc; 9113171a47aSMarc Zyngier struct its_node *its; 9123171a47aSMarc Zyngier unsigned long flags; 9133171a47aSMarc Zyngier int col_id = vpe->col_idx; 9143171a47aSMarc Zyngier 9153171a47aSMarc Zyngier desc.its_vmovp_cmd.vpe = vpe; 9163171a47aSMarc Zyngier desc.its_vmovp_cmd.its_list = (u16)its_list_map; 9173171a47aSMarc Zyngier 9183171a47aSMarc Zyngier if (!its_list_map) { 9193171a47aSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 9203171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = 0; 9213171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 9223171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 9233171a47aSMarc Zyngier return; 9243171a47aSMarc Zyngier } 9253171a47aSMarc Zyngier 9263171a47aSMarc Zyngier /* 9273171a47aSMarc Zyngier * Yet another marvel of the architecture. If using the 9283171a47aSMarc Zyngier * its_list "feature", we need to make sure that all ITSs 9293171a47aSMarc Zyngier * receive all VMOVP commands in the same order. The only way 9303171a47aSMarc Zyngier * to guarantee this is to make vmovp a serialization point. 9313171a47aSMarc Zyngier * 9323171a47aSMarc Zyngier * Wall <-- Head. 9333171a47aSMarc Zyngier */ 9343171a47aSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 9353171a47aSMarc Zyngier 9363171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; 9373171a47aSMarc Zyngier 9383171a47aSMarc Zyngier /* Emit VMOVPs */ 9393171a47aSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 9403171a47aSMarc Zyngier if (!its->is_v4) 9413171a47aSMarc Zyngier continue; 9423171a47aSMarc Zyngier 9433171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 9443171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 9453171a47aSMarc Zyngier } 9463171a47aSMarc Zyngier 9473171a47aSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 9483171a47aSMarc Zyngier } 9493171a47aSMarc Zyngier 950eb78192bSMarc Zyngier static void its_send_vinvall(struct its_vpe *vpe) 951eb78192bSMarc Zyngier { 952eb78192bSMarc Zyngier struct its_cmd_desc desc; 953eb78192bSMarc Zyngier struct its_node *its; 954eb78192bSMarc Zyngier 955eb78192bSMarc Zyngier desc.its_vinvall_cmd.vpe = vpe; 956eb78192bSMarc Zyngier 957eb78192bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 958eb78192bSMarc Zyngier if (!its->is_v4) 959eb78192bSMarc Zyngier continue; 960eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); 961eb78192bSMarc Zyngier } 962eb78192bSMarc Zyngier } 963eb78192bSMarc Zyngier 964c48ed51cSMarc Zyngier /* 965c48ed51cSMarc Zyngier * irqchip functions - assumes MSI, mostly. 966c48ed51cSMarc Zyngier */ 967c48ed51cSMarc Zyngier 968c48ed51cSMarc Zyngier static inline u32 its_get_event_id(struct irq_data *d) 969c48ed51cSMarc Zyngier { 970c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 971591e5becSMarc Zyngier return d->hwirq - its_dev->event_map.lpi_base; 972c48ed51cSMarc Zyngier } 973c48ed51cSMarc Zyngier 974015ec038SMarc Zyngier static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) 975c48ed51cSMarc Zyngier { 976015ec038SMarc Zyngier irq_hw_number_t hwirq; 977adcdb94eSMarc Zyngier struct page *prop_page; 978adcdb94eSMarc Zyngier u8 *cfg; 979c48ed51cSMarc Zyngier 980015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 981015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 982015ec038SMarc Zyngier u32 event = its_get_event_id(d); 983015ec038SMarc Zyngier 984015ec038SMarc Zyngier prop_page = its_dev->event_map.vm->vprop_page; 985015ec038SMarc Zyngier hwirq = its_dev->event_map.vlpi_maps[event].vintid; 986015ec038SMarc Zyngier } else { 987adcdb94eSMarc Zyngier prop_page = gic_rdists->prop_page; 988015ec038SMarc Zyngier hwirq = d->hwirq; 989015ec038SMarc Zyngier } 990adcdb94eSMarc Zyngier 991adcdb94eSMarc Zyngier cfg = page_address(prop_page) + hwirq - 8192; 992adcdb94eSMarc Zyngier *cfg &= ~clr; 993015ec038SMarc Zyngier *cfg |= set | LPI_PROP_GROUP1; 994c48ed51cSMarc Zyngier 995c48ed51cSMarc Zyngier /* 996c48ed51cSMarc Zyngier * Make the above write visible to the redistributors. 997c48ed51cSMarc Zyngier * And yes, we're flushing exactly: One. Single. Byte. 998c48ed51cSMarc Zyngier * Humpf... 999c48ed51cSMarc Zyngier */ 1000c48ed51cSMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) 1001328191c0SVladimir Murzin gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); 1002c48ed51cSMarc Zyngier else 1003c48ed51cSMarc Zyngier dsb(ishst); 1004015ec038SMarc Zyngier } 1005015ec038SMarc Zyngier 1006015ec038SMarc Zyngier static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) 1007015ec038SMarc Zyngier { 1008015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1009015ec038SMarc Zyngier 1010015ec038SMarc Zyngier lpi_write_config(d, clr, set); 1011adcdb94eSMarc Zyngier its_send_inv(its_dev, its_get_event_id(d)); 1012c48ed51cSMarc Zyngier } 1013c48ed51cSMarc Zyngier 1014015ec038SMarc Zyngier static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) 1015015ec038SMarc Zyngier { 1016015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1017015ec038SMarc Zyngier u32 event = its_get_event_id(d); 1018015ec038SMarc Zyngier 1019015ec038SMarc Zyngier if (its_dev->event_map.vlpi_maps[event].db_enabled == enable) 1020015ec038SMarc Zyngier return; 1021015ec038SMarc Zyngier 1022015ec038SMarc Zyngier its_dev->event_map.vlpi_maps[event].db_enabled = enable; 1023015ec038SMarc Zyngier 1024015ec038SMarc Zyngier /* 1025015ec038SMarc Zyngier * More fun with the architecture: 1026015ec038SMarc Zyngier * 1027015ec038SMarc Zyngier * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI 1028015ec038SMarc Zyngier * value or to 1023, depending on the enable bit. But that 1029015ec038SMarc Zyngier * would be issueing a mapping for an /existing/ DevID+EventID 1030015ec038SMarc Zyngier * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI 1031015ec038SMarc Zyngier * to the /same/ vPE, using this opportunity to adjust the 1032015ec038SMarc Zyngier * doorbell. Mouahahahaha. We loves it, Precious. 1033015ec038SMarc Zyngier */ 1034015ec038SMarc Zyngier its_send_vmovi(its_dev, event); 1035015ec038SMarc Zyngier } 1036015ec038SMarc Zyngier 1037c48ed51cSMarc Zyngier static void its_mask_irq(struct irq_data *d) 1038c48ed51cSMarc Zyngier { 1039015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1040015ec038SMarc Zyngier its_vlpi_set_doorbell(d, false); 1041015ec038SMarc Zyngier 1042adcdb94eSMarc Zyngier lpi_update_config(d, LPI_PROP_ENABLED, 0); 1043c48ed51cSMarc Zyngier } 1044c48ed51cSMarc Zyngier 1045c48ed51cSMarc Zyngier static void its_unmask_irq(struct irq_data *d) 1046c48ed51cSMarc Zyngier { 1047015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1048015ec038SMarc Zyngier its_vlpi_set_doorbell(d, true); 1049015ec038SMarc Zyngier 1050adcdb94eSMarc Zyngier lpi_update_config(d, 0, LPI_PROP_ENABLED); 1051c48ed51cSMarc Zyngier } 1052c48ed51cSMarc Zyngier 1053c48ed51cSMarc Zyngier static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, 1054c48ed51cSMarc Zyngier bool force) 1055c48ed51cSMarc Zyngier { 1056fbf8f40eSGanapatrao Kulkarni unsigned int cpu; 1057fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 1058c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1059c48ed51cSMarc Zyngier struct its_collection *target_col; 1060c48ed51cSMarc Zyngier u32 id = its_get_event_id(d); 1061c48ed51cSMarc Zyngier 1062015ec038SMarc Zyngier /* A forwarded interrupt should use irq_set_vcpu_affinity */ 1063015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1064015ec038SMarc Zyngier return -EINVAL; 1065015ec038SMarc Zyngier 1066fbf8f40eSGanapatrao Kulkarni /* lpi cannot be routed to a redistributor that is on a foreign node */ 1067fbf8f40eSGanapatrao Kulkarni if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 1068fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) { 1069fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 1070fbf8f40eSGanapatrao Kulkarni if (!cpumask_intersects(mask_val, cpu_mask)) 1071fbf8f40eSGanapatrao Kulkarni return -EINVAL; 1072fbf8f40eSGanapatrao Kulkarni } 1073fbf8f40eSGanapatrao Kulkarni } 1074fbf8f40eSGanapatrao Kulkarni 1075fbf8f40eSGanapatrao Kulkarni cpu = cpumask_any_and(mask_val, cpu_mask); 1076fbf8f40eSGanapatrao Kulkarni 1077c48ed51cSMarc Zyngier if (cpu >= nr_cpu_ids) 1078c48ed51cSMarc Zyngier return -EINVAL; 1079c48ed51cSMarc Zyngier 10808b8d94a7SMaJun /* don't set the affinity when the target cpu is same as current one */ 10818b8d94a7SMaJun if (cpu != its_dev->event_map.col_map[id]) { 1082c48ed51cSMarc Zyngier target_col = &its_dev->its->collections[cpu]; 1083c48ed51cSMarc Zyngier its_send_movi(its_dev, target_col, id); 1084591e5becSMarc Zyngier its_dev->event_map.col_map[id] = cpu; 10858b8d94a7SMaJun } 1086c48ed51cSMarc Zyngier 1087c48ed51cSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 1088c48ed51cSMarc Zyngier } 1089c48ed51cSMarc Zyngier 1090b48ac83dSMarc Zyngier static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) 1091b48ac83dSMarc Zyngier { 1092b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1093b48ac83dSMarc Zyngier struct its_node *its; 1094b48ac83dSMarc Zyngier u64 addr; 1095b48ac83dSMarc Zyngier 1096b48ac83dSMarc Zyngier its = its_dev->its; 1097b48ac83dSMarc Zyngier addr = its->phys_base + GITS_TRANSLATER; 1098b48ac83dSMarc Zyngier 1099b11283ebSVladimir Murzin msg->address_lo = lower_32_bits(addr); 1100b11283ebSVladimir Murzin msg->address_hi = upper_32_bits(addr); 1101b48ac83dSMarc Zyngier msg->data = its_get_event_id(d); 110244bb7e24SRobin Murphy 110344bb7e24SRobin Murphy iommu_dma_map_msi_msg(d->irq, msg); 1104b48ac83dSMarc Zyngier } 1105b48ac83dSMarc Zyngier 11068d85dcedSMarc Zyngier static int its_irq_set_irqchip_state(struct irq_data *d, 11078d85dcedSMarc Zyngier enum irqchip_irq_state which, 11088d85dcedSMarc Zyngier bool state) 11098d85dcedSMarc Zyngier { 11108d85dcedSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 11118d85dcedSMarc Zyngier u32 event = its_get_event_id(d); 11128d85dcedSMarc Zyngier 11138d85dcedSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 11148d85dcedSMarc Zyngier return -EINVAL; 11158d85dcedSMarc Zyngier 11168d85dcedSMarc Zyngier if (state) 11178d85dcedSMarc Zyngier its_send_int(its_dev, event); 11188d85dcedSMarc Zyngier else 11198d85dcedSMarc Zyngier its_send_clear(its_dev, event); 11208d85dcedSMarc Zyngier 11218d85dcedSMarc Zyngier return 0; 11228d85dcedSMarc Zyngier } 11238d85dcedSMarc Zyngier 1124d011e4e6SMarc Zyngier static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) 1125d011e4e6SMarc Zyngier { 1126d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1127d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1128d011e4e6SMarc Zyngier int ret = 0; 1129d011e4e6SMarc Zyngier 1130d011e4e6SMarc Zyngier if (!info->map) 1131d011e4e6SMarc Zyngier return -EINVAL; 1132d011e4e6SMarc Zyngier 1133d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1134d011e4e6SMarc Zyngier 1135d011e4e6SMarc Zyngier if (!its_dev->event_map.vm) { 1136d011e4e6SMarc Zyngier struct its_vlpi_map *maps; 1137d011e4e6SMarc Zyngier 1138d011e4e6SMarc Zyngier maps = kzalloc(sizeof(*maps) * its_dev->event_map.nr_lpis, 1139d011e4e6SMarc Zyngier GFP_KERNEL); 1140d011e4e6SMarc Zyngier if (!maps) { 1141d011e4e6SMarc Zyngier ret = -ENOMEM; 1142d011e4e6SMarc Zyngier goto out; 1143d011e4e6SMarc Zyngier } 1144d011e4e6SMarc Zyngier 1145d011e4e6SMarc Zyngier its_dev->event_map.vm = info->map->vm; 1146d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps = maps; 1147d011e4e6SMarc Zyngier } else if (its_dev->event_map.vm != info->map->vm) { 1148d011e4e6SMarc Zyngier ret = -EINVAL; 1149d011e4e6SMarc Zyngier goto out; 1150d011e4e6SMarc Zyngier } 1151d011e4e6SMarc Zyngier 1152d011e4e6SMarc Zyngier /* Get our private copy of the mapping information */ 1153d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps[event] = *info->map; 1154d011e4e6SMarc Zyngier 1155d011e4e6SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1156d011e4e6SMarc Zyngier /* Already mapped, move it around */ 1157d011e4e6SMarc Zyngier its_send_vmovi(its_dev, event); 1158d011e4e6SMarc Zyngier } else { 1159d011e4e6SMarc Zyngier /* Drop the physical mapping */ 1160d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1161d011e4e6SMarc Zyngier 1162d011e4e6SMarc Zyngier /* and install the virtual one */ 1163d011e4e6SMarc Zyngier its_send_vmapti(its_dev, event); 1164d011e4e6SMarc Zyngier irqd_set_forwarded_to_vcpu(d); 1165d011e4e6SMarc Zyngier 1166d011e4e6SMarc Zyngier /* Increment the number of VLPIs */ 1167d011e4e6SMarc Zyngier its_dev->event_map.nr_vlpis++; 1168d011e4e6SMarc Zyngier } 1169d011e4e6SMarc Zyngier 1170d011e4e6SMarc Zyngier out: 1171d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1172d011e4e6SMarc Zyngier return ret; 1173d011e4e6SMarc Zyngier } 1174d011e4e6SMarc Zyngier 1175d011e4e6SMarc Zyngier static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) 1176d011e4e6SMarc Zyngier { 1177d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1178d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1179d011e4e6SMarc Zyngier int ret = 0; 1180d011e4e6SMarc Zyngier 1181d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1182d011e4e6SMarc Zyngier 1183d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || 1184d011e4e6SMarc Zyngier !its_dev->event_map.vlpi_maps[event].vm) { 1185d011e4e6SMarc Zyngier ret = -EINVAL; 1186d011e4e6SMarc Zyngier goto out; 1187d011e4e6SMarc Zyngier } 1188d011e4e6SMarc Zyngier 1189d011e4e6SMarc Zyngier /* Copy our mapping information to the incoming request */ 1190d011e4e6SMarc Zyngier *info->map = its_dev->event_map.vlpi_maps[event]; 1191d011e4e6SMarc Zyngier 1192d011e4e6SMarc Zyngier out: 1193d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1194d011e4e6SMarc Zyngier return ret; 1195d011e4e6SMarc Zyngier } 1196d011e4e6SMarc Zyngier 1197d011e4e6SMarc Zyngier static int its_vlpi_unmap(struct irq_data *d) 1198d011e4e6SMarc Zyngier { 1199d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1200d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1201d011e4e6SMarc Zyngier int ret = 0; 1202d011e4e6SMarc Zyngier 1203d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1204d011e4e6SMarc Zyngier 1205d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { 1206d011e4e6SMarc Zyngier ret = -EINVAL; 1207d011e4e6SMarc Zyngier goto out; 1208d011e4e6SMarc Zyngier } 1209d011e4e6SMarc Zyngier 1210d011e4e6SMarc Zyngier /* Drop the virtual mapping */ 1211d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1212d011e4e6SMarc Zyngier 1213d011e4e6SMarc Zyngier /* and restore the physical one */ 1214d011e4e6SMarc Zyngier irqd_clr_forwarded_to_vcpu(d); 1215d011e4e6SMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 1216d011e4e6SMarc Zyngier lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | 1217d011e4e6SMarc Zyngier LPI_PROP_ENABLED | 1218d011e4e6SMarc Zyngier LPI_PROP_GROUP1)); 1219d011e4e6SMarc Zyngier 1220d011e4e6SMarc Zyngier /* 1221d011e4e6SMarc Zyngier * Drop the refcount and make the device available again if 1222d011e4e6SMarc Zyngier * this was the last VLPI. 1223d011e4e6SMarc Zyngier */ 1224d011e4e6SMarc Zyngier if (!--its_dev->event_map.nr_vlpis) { 1225d011e4e6SMarc Zyngier its_dev->event_map.vm = NULL; 1226d011e4e6SMarc Zyngier kfree(its_dev->event_map.vlpi_maps); 1227d011e4e6SMarc Zyngier } 1228d011e4e6SMarc Zyngier 1229d011e4e6SMarc Zyngier out: 1230d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1231d011e4e6SMarc Zyngier return ret; 1232d011e4e6SMarc Zyngier } 1233d011e4e6SMarc Zyngier 1234015ec038SMarc Zyngier static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) 1235015ec038SMarc Zyngier { 1236015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1237015ec038SMarc Zyngier 1238015ec038SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) 1239015ec038SMarc Zyngier return -EINVAL; 1240015ec038SMarc Zyngier 1241015ec038SMarc Zyngier if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) 1242015ec038SMarc Zyngier lpi_update_config(d, 0xff, info->config); 1243015ec038SMarc Zyngier else 1244015ec038SMarc Zyngier lpi_write_config(d, 0xff, info->config); 1245015ec038SMarc Zyngier its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); 1246015ec038SMarc Zyngier 1247015ec038SMarc Zyngier return 0; 1248015ec038SMarc Zyngier } 1249015ec038SMarc Zyngier 1250c808eea8SMarc Zyngier static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 1251c808eea8SMarc Zyngier { 1252c808eea8SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1253c808eea8SMarc Zyngier struct its_cmd_info *info = vcpu_info; 1254c808eea8SMarc Zyngier 1255c808eea8SMarc Zyngier /* Need a v4 ITS */ 1256d011e4e6SMarc Zyngier if (!its_dev->its->is_v4) 1257c808eea8SMarc Zyngier return -EINVAL; 1258c808eea8SMarc Zyngier 1259d011e4e6SMarc Zyngier /* Unmap request? */ 1260d011e4e6SMarc Zyngier if (!info) 1261d011e4e6SMarc Zyngier return its_vlpi_unmap(d); 1262d011e4e6SMarc Zyngier 1263c808eea8SMarc Zyngier switch (info->cmd_type) { 1264c808eea8SMarc Zyngier case MAP_VLPI: 1265d011e4e6SMarc Zyngier return its_vlpi_map(d, info); 1266c808eea8SMarc Zyngier 1267c808eea8SMarc Zyngier case GET_VLPI: 1268d011e4e6SMarc Zyngier return its_vlpi_get(d, info); 1269c808eea8SMarc Zyngier 1270c808eea8SMarc Zyngier case PROP_UPDATE_VLPI: 1271c808eea8SMarc Zyngier case PROP_UPDATE_AND_INV_VLPI: 1272015ec038SMarc Zyngier return its_vlpi_prop_update(d, info); 1273c808eea8SMarc Zyngier 1274c808eea8SMarc Zyngier default: 1275c808eea8SMarc Zyngier return -EINVAL; 1276c808eea8SMarc Zyngier } 1277c808eea8SMarc Zyngier } 1278c808eea8SMarc Zyngier 1279c48ed51cSMarc Zyngier static struct irq_chip its_irq_chip = { 1280c48ed51cSMarc Zyngier .name = "ITS", 1281c48ed51cSMarc Zyngier .irq_mask = its_mask_irq, 1282c48ed51cSMarc Zyngier .irq_unmask = its_unmask_irq, 1283004fa08dSAshok Kumar .irq_eoi = irq_chip_eoi_parent, 1284c48ed51cSMarc Zyngier .irq_set_affinity = its_set_affinity, 1285b48ac83dSMarc Zyngier .irq_compose_msi_msg = its_irq_compose_msi_msg, 12868d85dcedSMarc Zyngier .irq_set_irqchip_state = its_irq_set_irqchip_state, 1287c808eea8SMarc Zyngier .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, 1288b48ac83dSMarc Zyngier }; 1289b48ac83dSMarc Zyngier 1290bf9529f8SMarc Zyngier /* 1291bf9529f8SMarc Zyngier * How we allocate LPIs: 1292bf9529f8SMarc Zyngier * 1293bf9529f8SMarc Zyngier * The GIC has id_bits bits for interrupt identifiers. From there, we 1294bf9529f8SMarc Zyngier * must subtract 8192 which are reserved for SGIs/PPIs/SPIs. Then, as 1295bf9529f8SMarc Zyngier * we allocate LPIs by chunks of 32, we can shift the whole thing by 5 1296bf9529f8SMarc Zyngier * bits to the right. 1297bf9529f8SMarc Zyngier * 1298bf9529f8SMarc Zyngier * This gives us (((1UL << id_bits) - 8192) >> 5) possible allocations. 1299bf9529f8SMarc Zyngier */ 1300bf9529f8SMarc Zyngier #define IRQS_PER_CHUNK_SHIFT 5 1301bf9529f8SMarc Zyngier #define IRQS_PER_CHUNK (1 << IRQS_PER_CHUNK_SHIFT) 13026c31e123SShanker Donthineni #define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ 1303bf9529f8SMarc Zyngier 1304bf9529f8SMarc Zyngier static unsigned long *lpi_bitmap; 1305bf9529f8SMarc Zyngier static u32 lpi_chunks; 1306bf9529f8SMarc Zyngier static DEFINE_SPINLOCK(lpi_lock); 1307bf9529f8SMarc Zyngier 1308bf9529f8SMarc Zyngier static int its_lpi_to_chunk(int lpi) 1309bf9529f8SMarc Zyngier { 1310bf9529f8SMarc Zyngier return (lpi - 8192) >> IRQS_PER_CHUNK_SHIFT; 1311bf9529f8SMarc Zyngier } 1312bf9529f8SMarc Zyngier 1313bf9529f8SMarc Zyngier static int its_chunk_to_lpi(int chunk) 1314bf9529f8SMarc Zyngier { 1315bf9529f8SMarc Zyngier return (chunk << IRQS_PER_CHUNK_SHIFT) + 8192; 1316bf9529f8SMarc Zyngier } 1317bf9529f8SMarc Zyngier 131804a0e4deSTomasz Nowicki static int __init its_lpi_init(u32 id_bits) 1319bf9529f8SMarc Zyngier { 1320bf9529f8SMarc Zyngier lpi_chunks = its_lpi_to_chunk(1UL << id_bits); 1321bf9529f8SMarc Zyngier 1322bf9529f8SMarc Zyngier lpi_bitmap = kzalloc(BITS_TO_LONGS(lpi_chunks) * sizeof(long), 1323bf9529f8SMarc Zyngier GFP_KERNEL); 1324bf9529f8SMarc Zyngier if (!lpi_bitmap) { 1325bf9529f8SMarc Zyngier lpi_chunks = 0; 1326bf9529f8SMarc Zyngier return -ENOMEM; 1327bf9529f8SMarc Zyngier } 1328bf9529f8SMarc Zyngier 1329bf9529f8SMarc Zyngier pr_info("ITS: Allocated %d chunks for LPIs\n", (int)lpi_chunks); 1330bf9529f8SMarc Zyngier return 0; 1331bf9529f8SMarc Zyngier } 1332bf9529f8SMarc Zyngier 1333bf9529f8SMarc Zyngier static unsigned long *its_lpi_alloc_chunks(int nr_irqs, int *base, int *nr_ids) 1334bf9529f8SMarc Zyngier { 1335bf9529f8SMarc Zyngier unsigned long *bitmap = NULL; 1336bf9529f8SMarc Zyngier int chunk_id; 1337bf9529f8SMarc Zyngier int nr_chunks; 1338bf9529f8SMarc Zyngier int i; 1339bf9529f8SMarc Zyngier 1340bf9529f8SMarc Zyngier nr_chunks = DIV_ROUND_UP(nr_irqs, IRQS_PER_CHUNK); 1341bf9529f8SMarc Zyngier 1342bf9529f8SMarc Zyngier spin_lock(&lpi_lock); 1343bf9529f8SMarc Zyngier 1344bf9529f8SMarc Zyngier do { 1345bf9529f8SMarc Zyngier chunk_id = bitmap_find_next_zero_area(lpi_bitmap, lpi_chunks, 1346bf9529f8SMarc Zyngier 0, nr_chunks, 0); 1347bf9529f8SMarc Zyngier if (chunk_id < lpi_chunks) 1348bf9529f8SMarc Zyngier break; 1349bf9529f8SMarc Zyngier 1350bf9529f8SMarc Zyngier nr_chunks--; 1351bf9529f8SMarc Zyngier } while (nr_chunks > 0); 1352bf9529f8SMarc Zyngier 1353bf9529f8SMarc Zyngier if (!nr_chunks) 1354bf9529f8SMarc Zyngier goto out; 1355bf9529f8SMarc Zyngier 1356bf9529f8SMarc Zyngier bitmap = kzalloc(BITS_TO_LONGS(nr_chunks * IRQS_PER_CHUNK) * sizeof (long), 1357bf9529f8SMarc Zyngier GFP_ATOMIC); 1358bf9529f8SMarc Zyngier if (!bitmap) 1359bf9529f8SMarc Zyngier goto out; 1360bf9529f8SMarc Zyngier 1361bf9529f8SMarc Zyngier for (i = 0; i < nr_chunks; i++) 1362bf9529f8SMarc Zyngier set_bit(chunk_id + i, lpi_bitmap); 1363bf9529f8SMarc Zyngier 1364bf9529f8SMarc Zyngier *base = its_chunk_to_lpi(chunk_id); 1365bf9529f8SMarc Zyngier *nr_ids = nr_chunks * IRQS_PER_CHUNK; 1366bf9529f8SMarc Zyngier 1367bf9529f8SMarc Zyngier out: 1368bf9529f8SMarc Zyngier spin_unlock(&lpi_lock); 1369bf9529f8SMarc Zyngier 1370c8415b94SMarc Zyngier if (!bitmap) 1371c8415b94SMarc Zyngier *base = *nr_ids = 0; 1372c8415b94SMarc Zyngier 1373bf9529f8SMarc Zyngier return bitmap; 1374bf9529f8SMarc Zyngier } 1375bf9529f8SMarc Zyngier 1376cf2be8baSMarc Zyngier static void its_lpi_free_chunks(unsigned long *bitmap, int base, int nr_ids) 1377bf9529f8SMarc Zyngier { 1378bf9529f8SMarc Zyngier int lpi; 1379bf9529f8SMarc Zyngier 1380bf9529f8SMarc Zyngier spin_lock(&lpi_lock); 1381bf9529f8SMarc Zyngier 1382bf9529f8SMarc Zyngier for (lpi = base; lpi < (base + nr_ids); lpi += IRQS_PER_CHUNK) { 1383bf9529f8SMarc Zyngier int chunk = its_lpi_to_chunk(lpi); 1384cf2be8baSMarc Zyngier 1385bf9529f8SMarc Zyngier BUG_ON(chunk > lpi_chunks); 1386bf9529f8SMarc Zyngier if (test_bit(chunk, lpi_bitmap)) { 1387bf9529f8SMarc Zyngier clear_bit(chunk, lpi_bitmap); 1388bf9529f8SMarc Zyngier } else { 1389bf9529f8SMarc Zyngier pr_err("Bad LPI chunk %d\n", chunk); 1390bf9529f8SMarc Zyngier } 1391bf9529f8SMarc Zyngier } 1392bf9529f8SMarc Zyngier 1393bf9529f8SMarc Zyngier spin_unlock(&lpi_lock); 1394bf9529f8SMarc Zyngier 1395cf2be8baSMarc Zyngier kfree(bitmap); 1396bf9529f8SMarc Zyngier } 13971ac19ca6SMarc Zyngier 13980e5ccf91SMarc Zyngier static struct page *its_allocate_prop_table(gfp_t gfp_flags) 13990e5ccf91SMarc Zyngier { 14000e5ccf91SMarc Zyngier struct page *prop_page; 14010e5ccf91SMarc Zyngier 14020e5ccf91SMarc Zyngier prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); 14030e5ccf91SMarc Zyngier if (!prop_page) 14040e5ccf91SMarc Zyngier return NULL; 14050e5ccf91SMarc Zyngier 14060e5ccf91SMarc Zyngier /* Priority 0xa0, Group-1, disabled */ 14070e5ccf91SMarc Zyngier memset(page_address(prop_page), 14080e5ccf91SMarc Zyngier LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, 14090e5ccf91SMarc Zyngier LPI_PROPBASE_SZ); 14100e5ccf91SMarc Zyngier 14110e5ccf91SMarc Zyngier /* Make sure the GIC will observe the written configuration */ 14120e5ccf91SMarc Zyngier gic_flush_dcache_to_poc(page_address(prop_page), LPI_PROPBASE_SZ); 14130e5ccf91SMarc Zyngier 14140e5ccf91SMarc Zyngier return prop_page; 14150e5ccf91SMarc Zyngier } 14160e5ccf91SMarc Zyngier 14177d75bbb4SMarc Zyngier static void its_free_prop_table(struct page *prop_page) 14187d75bbb4SMarc Zyngier { 14197d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(prop_page), 14207d75bbb4SMarc Zyngier get_order(LPI_PROPBASE_SZ)); 14217d75bbb4SMarc Zyngier } 14220e5ccf91SMarc Zyngier 14231ac19ca6SMarc Zyngier static int __init its_alloc_lpi_tables(void) 14241ac19ca6SMarc Zyngier { 14251ac19ca6SMarc Zyngier phys_addr_t paddr; 14261ac19ca6SMarc Zyngier 14276c31e123SShanker Donthineni lpi_id_bits = min_t(u32, gic_rdists->id_bits, ITS_MAX_LPI_NRBITS); 14280e5ccf91SMarc Zyngier gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT); 14291ac19ca6SMarc Zyngier if (!gic_rdists->prop_page) { 14301ac19ca6SMarc Zyngier pr_err("Failed to allocate PROPBASE\n"); 14311ac19ca6SMarc Zyngier return -ENOMEM; 14321ac19ca6SMarc Zyngier } 14331ac19ca6SMarc Zyngier 14341ac19ca6SMarc Zyngier paddr = page_to_phys(gic_rdists->prop_page); 14351ac19ca6SMarc Zyngier pr_info("GIC: using LPI property table @%pa\n", &paddr); 14361ac19ca6SMarc Zyngier 14376c31e123SShanker Donthineni return its_lpi_init(lpi_id_bits); 14381ac19ca6SMarc Zyngier } 14391ac19ca6SMarc Zyngier 14401ac19ca6SMarc Zyngier static const char *its_base_type_string[] = { 14411ac19ca6SMarc Zyngier [GITS_BASER_TYPE_DEVICE] = "Devices", 14421ac19ca6SMarc Zyngier [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", 14434f46de9dSMarc Zyngier [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", 14441ac19ca6SMarc Zyngier [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", 14451ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", 14461ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", 14471ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", 14481ac19ca6SMarc Zyngier }; 14491ac19ca6SMarc Zyngier 14502d81d425SShanker Donthineni static u64 its_read_baser(struct its_node *its, struct its_baser *baser) 14512d81d425SShanker Donthineni { 14522d81d425SShanker Donthineni u32 idx = baser - its->tables; 14532d81d425SShanker Donthineni 14540968a619SVladimir Murzin return gits_read_baser(its->base + GITS_BASER + (idx << 3)); 14552d81d425SShanker Donthineni } 14562d81d425SShanker Donthineni 14572d81d425SShanker Donthineni static void its_write_baser(struct its_node *its, struct its_baser *baser, 14582d81d425SShanker Donthineni u64 val) 14592d81d425SShanker Donthineni { 14602d81d425SShanker Donthineni u32 idx = baser - its->tables; 14612d81d425SShanker Donthineni 14620968a619SVladimir Murzin gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); 14632d81d425SShanker Donthineni baser->val = its_read_baser(its, baser); 14642d81d425SShanker Donthineni } 14652d81d425SShanker Donthineni 14669347359aSShanker Donthineni static int its_setup_baser(struct its_node *its, struct its_baser *baser, 14673faf24eaSShanker Donthineni u64 cache, u64 shr, u32 psz, u32 order, 14683faf24eaSShanker Donthineni bool indirect) 14699347359aSShanker Donthineni { 14709347359aSShanker Donthineni u64 val = its_read_baser(its, baser); 14719347359aSShanker Donthineni u64 esz = GITS_BASER_ENTRY_SIZE(val); 14729347359aSShanker Donthineni u64 type = GITS_BASER_TYPE(val); 14739347359aSShanker Donthineni u32 alloc_pages; 14749347359aSShanker Donthineni void *base; 14759347359aSShanker Donthineni u64 tmp; 14769347359aSShanker Donthineni 14779347359aSShanker Donthineni retry_alloc_baser: 14789347359aSShanker Donthineni alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); 14799347359aSShanker Donthineni if (alloc_pages > GITS_BASER_PAGES_MAX) { 14809347359aSShanker Donthineni pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", 14819347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 14829347359aSShanker Donthineni alloc_pages, GITS_BASER_PAGES_MAX); 14839347359aSShanker Donthineni alloc_pages = GITS_BASER_PAGES_MAX; 14849347359aSShanker Donthineni order = get_order(GITS_BASER_PAGES_MAX * psz); 14859347359aSShanker Donthineni } 14869347359aSShanker Donthineni 14879347359aSShanker Donthineni base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order); 14889347359aSShanker Donthineni if (!base) 14899347359aSShanker Donthineni return -ENOMEM; 14909347359aSShanker Donthineni 14919347359aSShanker Donthineni retry_baser: 14929347359aSShanker Donthineni val = (virt_to_phys(base) | 14939347359aSShanker Donthineni (type << GITS_BASER_TYPE_SHIFT) | 14949347359aSShanker Donthineni ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | 14959347359aSShanker Donthineni ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | 14969347359aSShanker Donthineni cache | 14979347359aSShanker Donthineni shr | 14989347359aSShanker Donthineni GITS_BASER_VALID); 14999347359aSShanker Donthineni 15003faf24eaSShanker Donthineni val |= indirect ? GITS_BASER_INDIRECT : 0x0; 15013faf24eaSShanker Donthineni 15029347359aSShanker Donthineni switch (psz) { 15039347359aSShanker Donthineni case SZ_4K: 15049347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_4K; 15059347359aSShanker Donthineni break; 15069347359aSShanker Donthineni case SZ_16K: 15079347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_16K; 15089347359aSShanker Donthineni break; 15099347359aSShanker Donthineni case SZ_64K: 15109347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_64K; 15119347359aSShanker Donthineni break; 15129347359aSShanker Donthineni } 15139347359aSShanker Donthineni 15149347359aSShanker Donthineni its_write_baser(its, baser, val); 15159347359aSShanker Donthineni tmp = baser->val; 15169347359aSShanker Donthineni 15179347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { 15189347359aSShanker Donthineni /* 15199347359aSShanker Donthineni * Shareability didn't stick. Just use 15209347359aSShanker Donthineni * whatever the read reported, which is likely 15219347359aSShanker Donthineni * to be the only thing this redistributor 15229347359aSShanker Donthineni * supports. If that's zero, make it 15239347359aSShanker Donthineni * non-cacheable as well. 15249347359aSShanker Donthineni */ 15259347359aSShanker Donthineni shr = tmp & GITS_BASER_SHAREABILITY_MASK; 15269347359aSShanker Donthineni if (!shr) { 15279347359aSShanker Donthineni cache = GITS_BASER_nC; 1528328191c0SVladimir Murzin gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); 15299347359aSShanker Donthineni } 15309347359aSShanker Donthineni goto retry_baser; 15319347359aSShanker Donthineni } 15329347359aSShanker Donthineni 15339347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_PAGE_SIZE_MASK) { 15349347359aSShanker Donthineni /* 15359347359aSShanker Donthineni * Page size didn't stick. Let's try a smaller 15369347359aSShanker Donthineni * size and retry. If we reach 4K, then 15379347359aSShanker Donthineni * something is horribly wrong... 15389347359aSShanker Donthineni */ 15399347359aSShanker Donthineni free_pages((unsigned long)base, order); 15409347359aSShanker Donthineni baser->base = NULL; 15419347359aSShanker Donthineni 15429347359aSShanker Donthineni switch (psz) { 15439347359aSShanker Donthineni case SZ_16K: 15449347359aSShanker Donthineni psz = SZ_4K; 15459347359aSShanker Donthineni goto retry_alloc_baser; 15469347359aSShanker Donthineni case SZ_64K: 15479347359aSShanker Donthineni psz = SZ_16K; 15489347359aSShanker Donthineni goto retry_alloc_baser; 15499347359aSShanker Donthineni } 15509347359aSShanker Donthineni } 15519347359aSShanker Donthineni 15529347359aSShanker Donthineni if (val != tmp) { 1553b11283ebSVladimir Murzin pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", 15549347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 1555b11283ebSVladimir Murzin val, tmp); 15569347359aSShanker Donthineni free_pages((unsigned long)base, order); 15579347359aSShanker Donthineni return -ENXIO; 15589347359aSShanker Donthineni } 15599347359aSShanker Donthineni 15609347359aSShanker Donthineni baser->order = order; 15619347359aSShanker Donthineni baser->base = base; 15629347359aSShanker Donthineni baser->psz = psz; 15633faf24eaSShanker Donthineni tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; 15649347359aSShanker Donthineni 15653faf24eaSShanker Donthineni pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", 1566d524eaa2SVladimir Murzin &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), 15679347359aSShanker Donthineni its_base_type_string[type], 15689347359aSShanker Donthineni (unsigned long)virt_to_phys(base), 15693faf24eaSShanker Donthineni indirect ? "indirect" : "flat", (int)esz, 15709347359aSShanker Donthineni psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); 15719347359aSShanker Donthineni 15729347359aSShanker Donthineni return 0; 15739347359aSShanker Donthineni } 15749347359aSShanker Donthineni 15754cacac57SMarc Zyngier static bool its_parse_indirect_baser(struct its_node *its, 15764cacac57SMarc Zyngier struct its_baser *baser, 15773faf24eaSShanker Donthineni u32 psz, u32 *order) 15784b75c459SShanker Donthineni { 15794cacac57SMarc Zyngier u64 tmp = its_read_baser(its, baser); 15804cacac57SMarc Zyngier u64 type = GITS_BASER_TYPE(tmp); 15814cacac57SMarc Zyngier u64 esz = GITS_BASER_ENTRY_SIZE(tmp); 15822fd632a0SShanker Donthineni u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; 15834b75c459SShanker Donthineni u32 ids = its->device_ids; 15844b75c459SShanker Donthineni u32 new_order = *order; 15853faf24eaSShanker Donthineni bool indirect = false; 15863faf24eaSShanker Donthineni 15873faf24eaSShanker Donthineni /* No need to enable Indirection if memory requirement < (psz*2)bytes */ 15883faf24eaSShanker Donthineni if ((esz << ids) > (psz * 2)) { 15893faf24eaSShanker Donthineni /* 15903faf24eaSShanker Donthineni * Find out whether hw supports a single or two-level table by 15913faf24eaSShanker Donthineni * table by reading bit at offset '62' after writing '1' to it. 15923faf24eaSShanker Donthineni */ 15933faf24eaSShanker Donthineni its_write_baser(its, baser, val | GITS_BASER_INDIRECT); 15943faf24eaSShanker Donthineni indirect = !!(baser->val & GITS_BASER_INDIRECT); 15953faf24eaSShanker Donthineni 15963faf24eaSShanker Donthineni if (indirect) { 15973faf24eaSShanker Donthineni /* 15983faf24eaSShanker Donthineni * The size of the lvl2 table is equal to ITS page size 15993faf24eaSShanker Donthineni * which is 'psz'. For computing lvl1 table size, 16003faf24eaSShanker Donthineni * subtract ID bits that sparse lvl2 table from 'ids' 16013faf24eaSShanker Donthineni * which is reported by ITS hardware times lvl1 table 16023faf24eaSShanker Donthineni * entry size. 16033faf24eaSShanker Donthineni */ 1604d524eaa2SVladimir Murzin ids -= ilog2(psz / (int)esz); 16053faf24eaSShanker Donthineni esz = GITS_LVL1_ENTRY_SIZE; 16063faf24eaSShanker Donthineni } 16073faf24eaSShanker Donthineni } 16084b75c459SShanker Donthineni 16094b75c459SShanker Donthineni /* 16104b75c459SShanker Donthineni * Allocate as many entries as required to fit the 16114b75c459SShanker Donthineni * range of device IDs that the ITS can grok... The ID 16124b75c459SShanker Donthineni * space being incredibly sparse, this results in a 16133faf24eaSShanker Donthineni * massive waste of memory if two-level device table 16143faf24eaSShanker Donthineni * feature is not supported by hardware. 16154b75c459SShanker Donthineni */ 16164b75c459SShanker Donthineni new_order = max_t(u32, get_order(esz << ids), new_order); 16174b75c459SShanker Donthineni if (new_order >= MAX_ORDER) { 16184b75c459SShanker Donthineni new_order = MAX_ORDER - 1; 1619d524eaa2SVladimir Murzin ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); 16204cacac57SMarc Zyngier pr_warn("ITS@%pa: %s Table too large, reduce ids %u->%u\n", 16214cacac57SMarc Zyngier &its->phys_base, its_base_type_string[type], 16224cacac57SMarc Zyngier its->device_ids, ids); 16234b75c459SShanker Donthineni } 16244b75c459SShanker Donthineni 16254b75c459SShanker Donthineni *order = new_order; 16263faf24eaSShanker Donthineni 16273faf24eaSShanker Donthineni return indirect; 16284b75c459SShanker Donthineni } 16294b75c459SShanker Donthineni 16301ac19ca6SMarc Zyngier static void its_free_tables(struct its_node *its) 16311ac19ca6SMarc Zyngier { 16321ac19ca6SMarc Zyngier int i; 16331ac19ca6SMarc Zyngier 16341ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 16351a485f4dSShanker Donthineni if (its->tables[i].base) { 16361a485f4dSShanker Donthineni free_pages((unsigned long)its->tables[i].base, 16371a485f4dSShanker Donthineni its->tables[i].order); 16381a485f4dSShanker Donthineni its->tables[i].base = NULL; 16391ac19ca6SMarc Zyngier } 16401ac19ca6SMarc Zyngier } 16411ac19ca6SMarc Zyngier } 16421ac19ca6SMarc Zyngier 16430e0b0f69SShanker Donthineni static int its_alloc_tables(struct its_node *its) 16441ac19ca6SMarc Zyngier { 1645589ce5f4SMarc Zyngier u64 typer = gic_read_typer(its->base + GITS_TYPER); 16469347359aSShanker Donthineni u32 ids = GITS_TYPER_DEVBITS(typer); 16471ac19ca6SMarc Zyngier u64 shr = GITS_BASER_InnerShareable; 16482fd632a0SShanker Donthineni u64 cache = GITS_BASER_RaWaWb; 16499347359aSShanker Donthineni u32 psz = SZ_64K; 16509347359aSShanker Donthineni int err, i; 165194100970SRobert Richter 165294100970SRobert Richter if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) { 165394100970SRobert Richter /* 165494100970SRobert Richter * erratum 22375: only alloc 8MB table size 165594100970SRobert Richter * erratum 24313: ignore memory access type 165694100970SRobert Richter */ 16579347359aSShanker Donthineni cache = GITS_BASER_nCnB; 165894100970SRobert Richter ids = 0x14; /* 20 bits, 8MB */ 165994100970SRobert Richter } 16601ac19ca6SMarc Zyngier 1661466b7d16SShanker Donthineni its->device_ids = ids; 1662466b7d16SShanker Donthineni 16631ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 16642d81d425SShanker Donthineni struct its_baser *baser = its->tables + i; 16652d81d425SShanker Donthineni u64 val = its_read_baser(its, baser); 16661ac19ca6SMarc Zyngier u64 type = GITS_BASER_TYPE(val); 16679347359aSShanker Donthineni u32 order = get_order(psz); 16683faf24eaSShanker Donthineni bool indirect = false; 16691ac19ca6SMarc Zyngier 16704cacac57SMarc Zyngier switch (type) { 16714cacac57SMarc Zyngier case GITS_BASER_TYPE_NONE: 16721ac19ca6SMarc Zyngier continue; 16731ac19ca6SMarc Zyngier 16744cacac57SMarc Zyngier case GITS_BASER_TYPE_DEVICE: 16754cacac57SMarc Zyngier case GITS_BASER_TYPE_VCPU: 16764cacac57SMarc Zyngier indirect = its_parse_indirect_baser(its, baser, 16774cacac57SMarc Zyngier psz, &order); 16784cacac57SMarc Zyngier break; 16794cacac57SMarc Zyngier } 1680f54b97edSMarc Zyngier 16813faf24eaSShanker Donthineni err = its_setup_baser(its, baser, cache, shr, psz, order, indirect); 16829347359aSShanker Donthineni if (err < 0) { 16839347359aSShanker Donthineni its_free_tables(its); 16849347359aSShanker Donthineni return err; 168530f21363SRobert Richter } 168630f21363SRobert Richter 16879347359aSShanker Donthineni /* Update settings which will be used for next BASERn */ 16889347359aSShanker Donthineni psz = baser->psz; 16899347359aSShanker Donthineni cache = baser->val & GITS_BASER_CACHEABILITY_MASK; 16909347359aSShanker Donthineni shr = baser->val & GITS_BASER_SHAREABILITY_MASK; 16911ac19ca6SMarc Zyngier } 16921ac19ca6SMarc Zyngier 16931ac19ca6SMarc Zyngier return 0; 16941ac19ca6SMarc Zyngier } 16951ac19ca6SMarc Zyngier 16961ac19ca6SMarc Zyngier static int its_alloc_collections(struct its_node *its) 16971ac19ca6SMarc Zyngier { 16981ac19ca6SMarc Zyngier its->collections = kzalloc(nr_cpu_ids * sizeof(*its->collections), 16991ac19ca6SMarc Zyngier GFP_KERNEL); 17001ac19ca6SMarc Zyngier if (!its->collections) 17011ac19ca6SMarc Zyngier return -ENOMEM; 17021ac19ca6SMarc Zyngier 17031ac19ca6SMarc Zyngier return 0; 17041ac19ca6SMarc Zyngier } 17051ac19ca6SMarc Zyngier 17067c297a2dSMarc Zyngier static struct page *its_allocate_pending_table(gfp_t gfp_flags) 17077c297a2dSMarc Zyngier { 17087c297a2dSMarc Zyngier struct page *pend_page; 17097c297a2dSMarc Zyngier /* 17107c297a2dSMarc Zyngier * The pending pages have to be at least 64kB aligned, 17117c297a2dSMarc Zyngier * hence the 'max(LPI_PENDBASE_SZ, SZ_64K)' below. 17127c297a2dSMarc Zyngier */ 17137c297a2dSMarc Zyngier pend_page = alloc_pages(gfp_flags | __GFP_ZERO, 17147c297a2dSMarc Zyngier get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K))); 17157c297a2dSMarc Zyngier if (!pend_page) 17167c297a2dSMarc Zyngier return NULL; 17177c297a2dSMarc Zyngier 17187c297a2dSMarc Zyngier /* Make sure the GIC will observe the zero-ed page */ 17197c297a2dSMarc Zyngier gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); 17207c297a2dSMarc Zyngier 17217c297a2dSMarc Zyngier return pend_page; 17227c297a2dSMarc Zyngier } 17237c297a2dSMarc Zyngier 17247d75bbb4SMarc Zyngier static void its_free_pending_table(struct page *pt) 17257d75bbb4SMarc Zyngier { 17267d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(pt), 17277d75bbb4SMarc Zyngier get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K))); 17287d75bbb4SMarc Zyngier } 17297d75bbb4SMarc Zyngier 17301ac19ca6SMarc Zyngier static void its_cpu_init_lpis(void) 17311ac19ca6SMarc Zyngier { 17321ac19ca6SMarc Zyngier void __iomem *rbase = gic_data_rdist_rd_base(); 17331ac19ca6SMarc Zyngier struct page *pend_page; 17341ac19ca6SMarc Zyngier u64 val, tmp; 17351ac19ca6SMarc Zyngier 17361ac19ca6SMarc Zyngier /* If we didn't allocate the pending table yet, do it now */ 17371ac19ca6SMarc Zyngier pend_page = gic_data_rdist()->pend_page; 17381ac19ca6SMarc Zyngier if (!pend_page) { 17391ac19ca6SMarc Zyngier phys_addr_t paddr; 17407c297a2dSMarc Zyngier 17417c297a2dSMarc Zyngier pend_page = its_allocate_pending_table(GFP_NOWAIT); 17421ac19ca6SMarc Zyngier if (!pend_page) { 17431ac19ca6SMarc Zyngier pr_err("Failed to allocate PENDBASE for CPU%d\n", 17441ac19ca6SMarc Zyngier smp_processor_id()); 17451ac19ca6SMarc Zyngier return; 17461ac19ca6SMarc Zyngier } 17471ac19ca6SMarc Zyngier 17481ac19ca6SMarc Zyngier paddr = page_to_phys(pend_page); 17491ac19ca6SMarc Zyngier pr_info("CPU%d: using LPI pending table @%pa\n", 17501ac19ca6SMarc Zyngier smp_processor_id(), &paddr); 17511ac19ca6SMarc Zyngier gic_data_rdist()->pend_page = pend_page; 17521ac19ca6SMarc Zyngier } 17531ac19ca6SMarc Zyngier 17541ac19ca6SMarc Zyngier /* Disable LPIs */ 17551ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 17561ac19ca6SMarc Zyngier val &= ~GICR_CTLR_ENABLE_LPIS; 17571ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 17581ac19ca6SMarc Zyngier 17591ac19ca6SMarc Zyngier /* 17601ac19ca6SMarc Zyngier * Make sure any change to the table is observable by the GIC. 17611ac19ca6SMarc Zyngier */ 17621ac19ca6SMarc Zyngier dsb(sy); 17631ac19ca6SMarc Zyngier 17641ac19ca6SMarc Zyngier /* set PROPBASE */ 17651ac19ca6SMarc Zyngier val = (page_to_phys(gic_rdists->prop_page) | 17661ac19ca6SMarc Zyngier GICR_PROPBASER_InnerShareable | 17672fd632a0SShanker Donthineni GICR_PROPBASER_RaWaWb | 17681ac19ca6SMarc Zyngier ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); 17691ac19ca6SMarc Zyngier 17700968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 17710968a619SVladimir Murzin tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); 17721ac19ca6SMarc Zyngier 17731ac19ca6SMarc Zyngier if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { 1774241a386cSMarc Zyngier if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { 1775241a386cSMarc Zyngier /* 1776241a386cSMarc Zyngier * The HW reports non-shareable, we must 1777241a386cSMarc Zyngier * remove the cacheability attributes as 1778241a386cSMarc Zyngier * well. 1779241a386cSMarc Zyngier */ 1780241a386cSMarc Zyngier val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | 1781241a386cSMarc Zyngier GICR_PROPBASER_CACHEABILITY_MASK); 1782241a386cSMarc Zyngier val |= GICR_PROPBASER_nC; 17830968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 1784241a386cSMarc Zyngier } 17851ac19ca6SMarc Zyngier pr_info_once("GIC: using cache flushing for LPI property table\n"); 17861ac19ca6SMarc Zyngier gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; 17871ac19ca6SMarc Zyngier } 17881ac19ca6SMarc Zyngier 17891ac19ca6SMarc Zyngier /* set PENDBASE */ 17901ac19ca6SMarc Zyngier val = (page_to_phys(pend_page) | 17914ad3e363SMarc Zyngier GICR_PENDBASER_InnerShareable | 17922fd632a0SShanker Donthineni GICR_PENDBASER_RaWaWb); 17931ac19ca6SMarc Zyngier 17940968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 17950968a619SVladimir Murzin tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); 1796241a386cSMarc Zyngier 1797241a386cSMarc Zyngier if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { 1798241a386cSMarc Zyngier /* 1799241a386cSMarc Zyngier * The HW reports non-shareable, we must remove the 1800241a386cSMarc Zyngier * cacheability attributes as well. 1801241a386cSMarc Zyngier */ 1802241a386cSMarc Zyngier val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | 1803241a386cSMarc Zyngier GICR_PENDBASER_CACHEABILITY_MASK); 1804241a386cSMarc Zyngier val |= GICR_PENDBASER_nC; 18050968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 1806241a386cSMarc Zyngier } 18071ac19ca6SMarc Zyngier 18081ac19ca6SMarc Zyngier /* Enable LPIs */ 18091ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 18101ac19ca6SMarc Zyngier val |= GICR_CTLR_ENABLE_LPIS; 18111ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 18121ac19ca6SMarc Zyngier 18131ac19ca6SMarc Zyngier /* Make sure the GIC has seen the above */ 18141ac19ca6SMarc Zyngier dsb(sy); 18151ac19ca6SMarc Zyngier } 18161ac19ca6SMarc Zyngier 18171ac19ca6SMarc Zyngier static void its_cpu_init_collection(void) 18181ac19ca6SMarc Zyngier { 18191ac19ca6SMarc Zyngier struct its_node *its; 18201ac19ca6SMarc Zyngier int cpu; 18211ac19ca6SMarc Zyngier 18221ac19ca6SMarc Zyngier spin_lock(&its_lock); 18231ac19ca6SMarc Zyngier cpu = smp_processor_id(); 18241ac19ca6SMarc Zyngier 18251ac19ca6SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 18261ac19ca6SMarc Zyngier u64 target; 18271ac19ca6SMarc Zyngier 1828fbf8f40eSGanapatrao Kulkarni /* avoid cross node collections and its mapping */ 1829fbf8f40eSGanapatrao Kulkarni if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 1830fbf8f40eSGanapatrao Kulkarni struct device_node *cpu_node; 1831fbf8f40eSGanapatrao Kulkarni 1832fbf8f40eSGanapatrao Kulkarni cpu_node = of_get_cpu_node(cpu, NULL); 1833fbf8f40eSGanapatrao Kulkarni if (its->numa_node != NUMA_NO_NODE && 1834fbf8f40eSGanapatrao Kulkarni its->numa_node != of_node_to_nid(cpu_node)) 1835fbf8f40eSGanapatrao Kulkarni continue; 1836fbf8f40eSGanapatrao Kulkarni } 1837fbf8f40eSGanapatrao Kulkarni 18381ac19ca6SMarc Zyngier /* 18391ac19ca6SMarc Zyngier * We now have to bind each collection to its target 18401ac19ca6SMarc Zyngier * redistributor. 18411ac19ca6SMarc Zyngier */ 1842589ce5f4SMarc Zyngier if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { 18431ac19ca6SMarc Zyngier /* 18441ac19ca6SMarc Zyngier * This ITS wants the physical address of the 18451ac19ca6SMarc Zyngier * redistributor. 18461ac19ca6SMarc Zyngier */ 18471ac19ca6SMarc Zyngier target = gic_data_rdist()->phys_base; 18481ac19ca6SMarc Zyngier } else { 18491ac19ca6SMarc Zyngier /* 18501ac19ca6SMarc Zyngier * This ITS wants a linear CPU number. 18511ac19ca6SMarc Zyngier */ 1852589ce5f4SMarc Zyngier target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 1853263fcd31SMarc Zyngier target = GICR_TYPER_CPU_NUMBER(target) << 16; 18541ac19ca6SMarc Zyngier } 18551ac19ca6SMarc Zyngier 18561ac19ca6SMarc Zyngier /* Perform collection mapping */ 18571ac19ca6SMarc Zyngier its->collections[cpu].target_address = target; 18581ac19ca6SMarc Zyngier its->collections[cpu].col_id = cpu; 18591ac19ca6SMarc Zyngier 18601ac19ca6SMarc Zyngier its_send_mapc(its, &its->collections[cpu], 1); 18611ac19ca6SMarc Zyngier its_send_invall(its, &its->collections[cpu]); 18621ac19ca6SMarc Zyngier } 18631ac19ca6SMarc Zyngier 18641ac19ca6SMarc Zyngier spin_unlock(&its_lock); 18651ac19ca6SMarc Zyngier } 186684a6a2e7SMarc Zyngier 186784a6a2e7SMarc Zyngier static struct its_device *its_find_device(struct its_node *its, u32 dev_id) 186884a6a2e7SMarc Zyngier { 186984a6a2e7SMarc Zyngier struct its_device *its_dev = NULL, *tmp; 18703e39e8f5SMarc Zyngier unsigned long flags; 187184a6a2e7SMarc Zyngier 18723e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 187384a6a2e7SMarc Zyngier 187484a6a2e7SMarc Zyngier list_for_each_entry(tmp, &its->its_device_list, entry) { 187584a6a2e7SMarc Zyngier if (tmp->device_id == dev_id) { 187684a6a2e7SMarc Zyngier its_dev = tmp; 187784a6a2e7SMarc Zyngier break; 187884a6a2e7SMarc Zyngier } 187984a6a2e7SMarc Zyngier } 188084a6a2e7SMarc Zyngier 18813e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 188284a6a2e7SMarc Zyngier 188384a6a2e7SMarc Zyngier return its_dev; 188484a6a2e7SMarc Zyngier } 188584a6a2e7SMarc Zyngier 1886466b7d16SShanker Donthineni static struct its_baser *its_get_baser(struct its_node *its, u32 type) 1887466b7d16SShanker Donthineni { 1888466b7d16SShanker Donthineni int i; 1889466b7d16SShanker Donthineni 1890466b7d16SShanker Donthineni for (i = 0; i < GITS_BASER_NR_REGS; i++) { 1891466b7d16SShanker Donthineni if (GITS_BASER_TYPE(its->tables[i].val) == type) 1892466b7d16SShanker Donthineni return &its->tables[i]; 1893466b7d16SShanker Donthineni } 1894466b7d16SShanker Donthineni 1895466b7d16SShanker Donthineni return NULL; 1896466b7d16SShanker Donthineni } 1897466b7d16SShanker Donthineni 189870cc81edSMarc Zyngier static bool its_alloc_table_entry(struct its_baser *baser, u32 id) 18993faf24eaSShanker Donthineni { 19003faf24eaSShanker Donthineni struct page *page; 19013faf24eaSShanker Donthineni u32 esz, idx; 19023faf24eaSShanker Donthineni __le64 *table; 19033faf24eaSShanker Donthineni 19043faf24eaSShanker Donthineni /* Don't allow device id that exceeds single, flat table limit */ 19053faf24eaSShanker Donthineni esz = GITS_BASER_ENTRY_SIZE(baser->val); 19063faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_INDIRECT)) 190770cc81edSMarc Zyngier return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); 19083faf24eaSShanker Donthineni 19093faf24eaSShanker Donthineni /* Compute 1st level table index & check if that exceeds table limit */ 191070cc81edSMarc Zyngier idx = id >> ilog2(baser->psz / esz); 19113faf24eaSShanker Donthineni if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) 19123faf24eaSShanker Donthineni return false; 19133faf24eaSShanker Donthineni 19143faf24eaSShanker Donthineni table = baser->base; 19153faf24eaSShanker Donthineni 19163faf24eaSShanker Donthineni /* Allocate memory for 2nd level table */ 19173faf24eaSShanker Donthineni if (!table[idx]) { 19183faf24eaSShanker Donthineni page = alloc_pages(GFP_KERNEL | __GFP_ZERO, get_order(baser->psz)); 19193faf24eaSShanker Donthineni if (!page) 19203faf24eaSShanker Donthineni return false; 19213faf24eaSShanker Donthineni 19223faf24eaSShanker Donthineni /* Flush Lvl2 table to PoC if hw doesn't support coherency */ 19233faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 1924328191c0SVladimir Murzin gic_flush_dcache_to_poc(page_address(page), baser->psz); 19253faf24eaSShanker Donthineni 19263faf24eaSShanker Donthineni table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); 19273faf24eaSShanker Donthineni 19283faf24eaSShanker Donthineni /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ 19293faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 1930328191c0SVladimir Murzin gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); 19313faf24eaSShanker Donthineni 19323faf24eaSShanker Donthineni /* Ensure updated table contents are visible to ITS hardware */ 19333faf24eaSShanker Donthineni dsb(sy); 19343faf24eaSShanker Donthineni } 19353faf24eaSShanker Donthineni 19363faf24eaSShanker Donthineni return true; 19373faf24eaSShanker Donthineni } 19383faf24eaSShanker Donthineni 193970cc81edSMarc Zyngier static bool its_alloc_device_table(struct its_node *its, u32 dev_id) 194070cc81edSMarc Zyngier { 194170cc81edSMarc Zyngier struct its_baser *baser; 194270cc81edSMarc Zyngier 194370cc81edSMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); 194470cc81edSMarc Zyngier 194570cc81edSMarc Zyngier /* Don't allow device id that exceeds ITS hardware limit */ 194670cc81edSMarc Zyngier if (!baser) 194770cc81edSMarc Zyngier return (ilog2(dev_id) < its->device_ids); 194870cc81edSMarc Zyngier 194970cc81edSMarc Zyngier return its_alloc_table_entry(baser, dev_id); 195070cc81edSMarc Zyngier } 195170cc81edSMarc Zyngier 19527d75bbb4SMarc Zyngier static bool its_alloc_vpe_table(u32 vpe_id) 19537d75bbb4SMarc Zyngier { 19547d75bbb4SMarc Zyngier struct its_node *its; 19557d75bbb4SMarc Zyngier 19567d75bbb4SMarc Zyngier /* 19577d75bbb4SMarc Zyngier * Make sure the L2 tables are allocated on *all* v4 ITSs. We 19587d75bbb4SMarc Zyngier * could try and only do it on ITSs corresponding to devices 19597d75bbb4SMarc Zyngier * that have interrupts targeted at this VPE, but the 19607d75bbb4SMarc Zyngier * complexity becomes crazy (and you have tons of memory 19617d75bbb4SMarc Zyngier * anyway, right?). 19627d75bbb4SMarc Zyngier */ 19637d75bbb4SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 19647d75bbb4SMarc Zyngier struct its_baser *baser; 19657d75bbb4SMarc Zyngier 19667d75bbb4SMarc Zyngier if (!its->is_v4) 19677d75bbb4SMarc Zyngier continue; 19687d75bbb4SMarc Zyngier 19697d75bbb4SMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); 19707d75bbb4SMarc Zyngier if (!baser) 19717d75bbb4SMarc Zyngier return false; 19727d75bbb4SMarc Zyngier 19737d75bbb4SMarc Zyngier if (!its_alloc_table_entry(baser, vpe_id)) 19747d75bbb4SMarc Zyngier return false; 19757d75bbb4SMarc Zyngier } 19767d75bbb4SMarc Zyngier 19777d75bbb4SMarc Zyngier return true; 19787d75bbb4SMarc Zyngier } 19797d75bbb4SMarc Zyngier 198084a6a2e7SMarc Zyngier static struct its_device *its_create_device(struct its_node *its, u32 dev_id, 198193f94ea0SMarc Zyngier int nvecs, bool alloc_lpis) 198284a6a2e7SMarc Zyngier { 198384a6a2e7SMarc Zyngier struct its_device *dev; 198493f94ea0SMarc Zyngier unsigned long *lpi_map = NULL; 19853e39e8f5SMarc Zyngier unsigned long flags; 1986591e5becSMarc Zyngier u16 *col_map = NULL; 198784a6a2e7SMarc Zyngier void *itt; 198884a6a2e7SMarc Zyngier int lpi_base; 198984a6a2e7SMarc Zyngier int nr_lpis; 1990c8481267SMarc Zyngier int nr_ites; 199184a6a2e7SMarc Zyngier int sz; 199284a6a2e7SMarc Zyngier 19933faf24eaSShanker Donthineni if (!its_alloc_device_table(its, dev_id)) 1994466b7d16SShanker Donthineni return NULL; 1995466b7d16SShanker Donthineni 199684a6a2e7SMarc Zyngier dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1997c8481267SMarc Zyngier /* 1998c8481267SMarc Zyngier * At least one bit of EventID is being used, hence a minimum 1999c8481267SMarc Zyngier * of two entries. No, the architecture doesn't let you 2000c8481267SMarc Zyngier * express an ITT with a single entry. 2001c8481267SMarc Zyngier */ 200296555c47SWill Deacon nr_ites = max(2UL, roundup_pow_of_two(nvecs)); 2003c8481267SMarc Zyngier sz = nr_ites * its->ite_size; 200484a6a2e7SMarc Zyngier sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; 20056c834125SYun Wu itt = kzalloc(sz, GFP_KERNEL); 200693f94ea0SMarc Zyngier if (alloc_lpis) { 200784a6a2e7SMarc Zyngier lpi_map = its_lpi_alloc_chunks(nvecs, &lpi_base, &nr_lpis); 2008591e5becSMarc Zyngier if (lpi_map) 200993f94ea0SMarc Zyngier col_map = kzalloc(sizeof(*col_map) * nr_lpis, 201093f94ea0SMarc Zyngier GFP_KERNEL); 201193f94ea0SMarc Zyngier } else { 201293f94ea0SMarc Zyngier col_map = kzalloc(sizeof(*col_map) * nr_ites, GFP_KERNEL); 201393f94ea0SMarc Zyngier nr_lpis = 0; 201493f94ea0SMarc Zyngier lpi_base = 0; 201593f94ea0SMarc Zyngier } 201684a6a2e7SMarc Zyngier 201793f94ea0SMarc Zyngier if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { 201884a6a2e7SMarc Zyngier kfree(dev); 201984a6a2e7SMarc Zyngier kfree(itt); 202084a6a2e7SMarc Zyngier kfree(lpi_map); 2021591e5becSMarc Zyngier kfree(col_map); 202284a6a2e7SMarc Zyngier return NULL; 202384a6a2e7SMarc Zyngier } 202484a6a2e7SMarc Zyngier 2025328191c0SVladimir Murzin gic_flush_dcache_to_poc(itt, sz); 20265a9a8915SMarc Zyngier 202784a6a2e7SMarc Zyngier dev->its = its; 202884a6a2e7SMarc Zyngier dev->itt = itt; 2029c8481267SMarc Zyngier dev->nr_ites = nr_ites; 2030591e5becSMarc Zyngier dev->event_map.lpi_map = lpi_map; 2031591e5becSMarc Zyngier dev->event_map.col_map = col_map; 2032591e5becSMarc Zyngier dev->event_map.lpi_base = lpi_base; 2033591e5becSMarc Zyngier dev->event_map.nr_lpis = nr_lpis; 2034d011e4e6SMarc Zyngier mutex_init(&dev->event_map.vlpi_lock); 203584a6a2e7SMarc Zyngier dev->device_id = dev_id; 203684a6a2e7SMarc Zyngier INIT_LIST_HEAD(&dev->entry); 203784a6a2e7SMarc Zyngier 20383e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 203984a6a2e7SMarc Zyngier list_add(&dev->entry, &its->its_device_list); 20403e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 204184a6a2e7SMarc Zyngier 204284a6a2e7SMarc Zyngier /* Map device to its ITT */ 204384a6a2e7SMarc Zyngier its_send_mapd(dev, 1); 204484a6a2e7SMarc Zyngier 204584a6a2e7SMarc Zyngier return dev; 204684a6a2e7SMarc Zyngier } 204784a6a2e7SMarc Zyngier 204884a6a2e7SMarc Zyngier static void its_free_device(struct its_device *its_dev) 204984a6a2e7SMarc Zyngier { 20503e39e8f5SMarc Zyngier unsigned long flags; 20513e39e8f5SMarc Zyngier 20523e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its_dev->its->lock, flags); 205384a6a2e7SMarc Zyngier list_del(&its_dev->entry); 20543e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); 205584a6a2e7SMarc Zyngier kfree(its_dev->itt); 205684a6a2e7SMarc Zyngier kfree(its_dev); 205784a6a2e7SMarc Zyngier } 2058b48ac83dSMarc Zyngier 2059b48ac83dSMarc Zyngier static int its_alloc_device_irq(struct its_device *dev, irq_hw_number_t *hwirq) 2060b48ac83dSMarc Zyngier { 2061b48ac83dSMarc Zyngier int idx; 2062b48ac83dSMarc Zyngier 2063591e5becSMarc Zyngier idx = find_first_zero_bit(dev->event_map.lpi_map, 2064591e5becSMarc Zyngier dev->event_map.nr_lpis); 2065591e5becSMarc Zyngier if (idx == dev->event_map.nr_lpis) 2066b48ac83dSMarc Zyngier return -ENOSPC; 2067b48ac83dSMarc Zyngier 2068591e5becSMarc Zyngier *hwirq = dev->event_map.lpi_base + idx; 2069591e5becSMarc Zyngier set_bit(idx, dev->event_map.lpi_map); 2070b48ac83dSMarc Zyngier 2071b48ac83dSMarc Zyngier return 0; 2072b48ac83dSMarc Zyngier } 2073b48ac83dSMarc Zyngier 207454456db9SMarc Zyngier static int its_msi_prepare(struct irq_domain *domain, struct device *dev, 2075b48ac83dSMarc Zyngier int nvec, msi_alloc_info_t *info) 2076b48ac83dSMarc Zyngier { 2077b48ac83dSMarc Zyngier struct its_node *its; 2078b48ac83dSMarc Zyngier struct its_device *its_dev; 207954456db9SMarc Zyngier struct msi_domain_info *msi_info; 208054456db9SMarc Zyngier u32 dev_id; 2081b48ac83dSMarc Zyngier 208254456db9SMarc Zyngier /* 208354456db9SMarc Zyngier * We ignore "dev" entierely, and rely on the dev_id that has 208454456db9SMarc Zyngier * been passed via the scratchpad. This limits this domain's 208554456db9SMarc Zyngier * usefulness to upper layers that definitely know that they 208654456db9SMarc Zyngier * are built on top of the ITS. 208754456db9SMarc Zyngier */ 208854456db9SMarc Zyngier dev_id = info->scratchpad[0].ul; 208954456db9SMarc Zyngier 209054456db9SMarc Zyngier msi_info = msi_get_domain_info(domain); 209154456db9SMarc Zyngier its = msi_info->data; 209254456db9SMarc Zyngier 2093f130420eSMarc Zyngier its_dev = its_find_device(its, dev_id); 2094e8137f4fSMarc Zyngier if (its_dev) { 2095e8137f4fSMarc Zyngier /* 2096e8137f4fSMarc Zyngier * We already have seen this ID, probably through 2097e8137f4fSMarc Zyngier * another alias (PCI bridge of some sort). No need to 2098e8137f4fSMarc Zyngier * create the device. 2099e8137f4fSMarc Zyngier */ 2100f130420eSMarc Zyngier pr_debug("Reusing ITT for devID %x\n", dev_id); 2101e8137f4fSMarc Zyngier goto out; 2102e8137f4fSMarc Zyngier } 2103b48ac83dSMarc Zyngier 210493f94ea0SMarc Zyngier its_dev = its_create_device(its, dev_id, nvec, true); 2105b48ac83dSMarc Zyngier if (!its_dev) 2106b48ac83dSMarc Zyngier return -ENOMEM; 2107b48ac83dSMarc Zyngier 2108f130420eSMarc Zyngier pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); 2109e8137f4fSMarc Zyngier out: 2110b48ac83dSMarc Zyngier info->scratchpad[0].ptr = its_dev; 2111b48ac83dSMarc Zyngier return 0; 2112b48ac83dSMarc Zyngier } 2113b48ac83dSMarc Zyngier 211454456db9SMarc Zyngier static struct msi_domain_ops its_msi_domain_ops = { 211554456db9SMarc Zyngier .msi_prepare = its_msi_prepare, 211654456db9SMarc Zyngier }; 211754456db9SMarc Zyngier 2118b48ac83dSMarc Zyngier static int its_irq_gic_domain_alloc(struct irq_domain *domain, 2119b48ac83dSMarc Zyngier unsigned int virq, 2120b48ac83dSMarc Zyngier irq_hw_number_t hwirq) 2121b48ac83dSMarc Zyngier { 2122f833f57fSMarc Zyngier struct irq_fwspec fwspec; 2123b48ac83dSMarc Zyngier 2124f833f57fSMarc Zyngier if (irq_domain_get_of_node(domain->parent)) { 2125f833f57fSMarc Zyngier fwspec.fwnode = domain->parent->fwnode; 2126f833f57fSMarc Zyngier fwspec.param_count = 3; 2127f833f57fSMarc Zyngier fwspec.param[0] = GIC_IRQ_TYPE_LPI; 2128f833f57fSMarc Zyngier fwspec.param[1] = hwirq; 2129f833f57fSMarc Zyngier fwspec.param[2] = IRQ_TYPE_EDGE_RISING; 21303f010cf1STomasz Nowicki } else if (is_fwnode_irqchip(domain->parent->fwnode)) { 21313f010cf1STomasz Nowicki fwspec.fwnode = domain->parent->fwnode; 21323f010cf1STomasz Nowicki fwspec.param_count = 2; 21333f010cf1STomasz Nowicki fwspec.param[0] = hwirq; 21343f010cf1STomasz Nowicki fwspec.param[1] = IRQ_TYPE_EDGE_RISING; 2135f833f57fSMarc Zyngier } else { 2136f833f57fSMarc Zyngier return -EINVAL; 2137f833f57fSMarc Zyngier } 2138b48ac83dSMarc Zyngier 2139f833f57fSMarc Zyngier return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); 2140b48ac83dSMarc Zyngier } 2141b48ac83dSMarc Zyngier 2142b48ac83dSMarc Zyngier static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 2143b48ac83dSMarc Zyngier unsigned int nr_irqs, void *args) 2144b48ac83dSMarc Zyngier { 2145b48ac83dSMarc Zyngier msi_alloc_info_t *info = args; 2146b48ac83dSMarc Zyngier struct its_device *its_dev = info->scratchpad[0].ptr; 2147b48ac83dSMarc Zyngier irq_hw_number_t hwirq; 2148b48ac83dSMarc Zyngier int err; 2149b48ac83dSMarc Zyngier int i; 2150b48ac83dSMarc Zyngier 2151b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 2152b48ac83dSMarc Zyngier err = its_alloc_device_irq(its_dev, &hwirq); 2153b48ac83dSMarc Zyngier if (err) 2154b48ac83dSMarc Zyngier return err; 2155b48ac83dSMarc Zyngier 2156b48ac83dSMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, hwirq); 2157b48ac83dSMarc Zyngier if (err) 2158b48ac83dSMarc Zyngier return err; 2159b48ac83dSMarc Zyngier 2160b48ac83dSMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, 2161b48ac83dSMarc Zyngier hwirq, &its_irq_chip, its_dev); 2162f130420eSMarc Zyngier pr_debug("ID:%d pID:%d vID:%d\n", 2163591e5becSMarc Zyngier (int)(hwirq - its_dev->event_map.lpi_base), 2164591e5becSMarc Zyngier (int) hwirq, virq + i); 2165b48ac83dSMarc Zyngier } 2166b48ac83dSMarc Zyngier 2167b48ac83dSMarc Zyngier return 0; 2168b48ac83dSMarc Zyngier } 2169b48ac83dSMarc Zyngier 2170aca268dfSMarc Zyngier static void its_irq_domain_activate(struct irq_domain *domain, 2171aca268dfSMarc Zyngier struct irq_data *d) 2172aca268dfSMarc Zyngier { 2173aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2174aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2175fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 2176fbf8f40eSGanapatrao Kulkarni 2177fbf8f40eSGanapatrao Kulkarni /* get the cpu_mask of local node */ 2178fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) 2179fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 2180aca268dfSMarc Zyngier 2181591e5becSMarc Zyngier /* Bind the LPI to the first possible CPU */ 2182fbf8f40eSGanapatrao Kulkarni its_dev->event_map.col_map[event] = cpumask_first(cpu_mask); 2183591e5becSMarc Zyngier 2184aca268dfSMarc Zyngier /* Map the GIC IRQ and event to the device */ 21856a25ad3aSMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 2186aca268dfSMarc Zyngier } 2187aca268dfSMarc Zyngier 2188aca268dfSMarc Zyngier static void its_irq_domain_deactivate(struct irq_domain *domain, 2189aca268dfSMarc Zyngier struct irq_data *d) 2190aca268dfSMarc Zyngier { 2191aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2192aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2193aca268dfSMarc Zyngier 2194aca268dfSMarc Zyngier /* Stop the delivery of interrupts */ 2195aca268dfSMarc Zyngier its_send_discard(its_dev, event); 2196aca268dfSMarc Zyngier } 2197aca268dfSMarc Zyngier 2198b48ac83dSMarc Zyngier static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, 2199b48ac83dSMarc Zyngier unsigned int nr_irqs) 2200b48ac83dSMarc Zyngier { 2201b48ac83dSMarc Zyngier struct irq_data *d = irq_domain_get_irq_data(domain, virq); 2202b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2203b48ac83dSMarc Zyngier int i; 2204b48ac83dSMarc Zyngier 2205b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 2206b48ac83dSMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 2207b48ac83dSMarc Zyngier virq + i); 2208aca268dfSMarc Zyngier u32 event = its_get_event_id(data); 2209b48ac83dSMarc Zyngier 2210b48ac83dSMarc Zyngier /* Mark interrupt index as unused */ 2211591e5becSMarc Zyngier clear_bit(event, its_dev->event_map.lpi_map); 2212b48ac83dSMarc Zyngier 2213b48ac83dSMarc Zyngier /* Nuke the entry in the domain */ 22142da39949SMarc Zyngier irq_domain_reset_irq_data(data); 2215b48ac83dSMarc Zyngier } 2216b48ac83dSMarc Zyngier 2217b48ac83dSMarc Zyngier /* If all interrupts have been freed, start mopping the floor */ 2218591e5becSMarc Zyngier if (bitmap_empty(its_dev->event_map.lpi_map, 2219591e5becSMarc Zyngier its_dev->event_map.nr_lpis)) { 2220cf2be8baSMarc Zyngier its_lpi_free_chunks(its_dev->event_map.lpi_map, 2221cf2be8baSMarc Zyngier its_dev->event_map.lpi_base, 2222cf2be8baSMarc Zyngier its_dev->event_map.nr_lpis); 2223cf2be8baSMarc Zyngier kfree(its_dev->event_map.col_map); 2224b48ac83dSMarc Zyngier 2225b48ac83dSMarc Zyngier /* Unmap device/itt */ 2226b48ac83dSMarc Zyngier its_send_mapd(its_dev, 0); 2227b48ac83dSMarc Zyngier its_free_device(its_dev); 2228b48ac83dSMarc Zyngier } 2229b48ac83dSMarc Zyngier 2230b48ac83dSMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 2231b48ac83dSMarc Zyngier } 2232b48ac83dSMarc Zyngier 2233b48ac83dSMarc Zyngier static const struct irq_domain_ops its_domain_ops = { 2234b48ac83dSMarc Zyngier .alloc = its_irq_domain_alloc, 2235b48ac83dSMarc Zyngier .free = its_irq_domain_free, 2236aca268dfSMarc Zyngier .activate = its_irq_domain_activate, 2237aca268dfSMarc Zyngier .deactivate = its_irq_domain_deactivate, 2238b48ac83dSMarc Zyngier }; 22394c21f3c2SMarc Zyngier 22403171a47aSMarc Zyngier static int its_vpe_set_affinity(struct irq_data *d, 22413171a47aSMarc Zyngier const struct cpumask *mask_val, 22423171a47aSMarc Zyngier bool force) 22433171a47aSMarc Zyngier { 22443171a47aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 22453171a47aSMarc Zyngier int cpu = cpumask_first(mask_val); 22463171a47aSMarc Zyngier 22473171a47aSMarc Zyngier /* 22483171a47aSMarc Zyngier * Changing affinity is mega expensive, so let's be as lazy as 22493171a47aSMarc Zyngier * we can and only do it if we really have to. 22503171a47aSMarc Zyngier */ 22513171a47aSMarc Zyngier if (vpe->col_idx != cpu) { 22523171a47aSMarc Zyngier vpe->col_idx = cpu; 22533171a47aSMarc Zyngier its_send_vmovp(vpe); 22543171a47aSMarc Zyngier } 22553171a47aSMarc Zyngier 22563171a47aSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 22573171a47aSMarc Zyngier } 22583171a47aSMarc Zyngier 2259e643d803SMarc Zyngier static void its_vpe_schedule(struct its_vpe *vpe) 2260e643d803SMarc Zyngier { 2261e643d803SMarc Zyngier void * __iomem vlpi_base = gic_data_rdist_vlpi_base(); 2262e643d803SMarc Zyngier u64 val; 2263e643d803SMarc Zyngier 2264e643d803SMarc Zyngier /* Schedule the VPE */ 2265e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & 2266e643d803SMarc Zyngier GENMASK_ULL(51, 12); 2267e643d803SMarc Zyngier val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 2268e643d803SMarc Zyngier val |= GICR_VPROPBASER_RaWb; 2269e643d803SMarc Zyngier val |= GICR_VPROPBASER_InnerShareable; 2270e643d803SMarc Zyngier gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 2271e643d803SMarc Zyngier 2272e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->vpt_page)) & 2273e643d803SMarc Zyngier GENMASK_ULL(51, 16); 2274e643d803SMarc Zyngier val |= GICR_VPENDBASER_RaWaWb; 2275e643d803SMarc Zyngier val |= GICR_VPENDBASER_NonShareable; 2276e643d803SMarc Zyngier /* 2277e643d803SMarc Zyngier * There is no good way of finding out if the pending table is 2278e643d803SMarc Zyngier * empty as we can race against the doorbell interrupt very 2279e643d803SMarc Zyngier * easily. So in the end, vpe->pending_last is only an 2280e643d803SMarc Zyngier * indication that the vcpu has something pending, not one 2281e643d803SMarc Zyngier * that the pending table is empty. A good implementation 2282e643d803SMarc Zyngier * would be able to read its coarse map pretty quickly anyway, 2283e643d803SMarc Zyngier * making this a tolerable issue. 2284e643d803SMarc Zyngier */ 2285e643d803SMarc Zyngier val |= GICR_VPENDBASER_PendingLast; 2286e643d803SMarc Zyngier val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; 2287e643d803SMarc Zyngier val |= GICR_VPENDBASER_Valid; 2288e643d803SMarc Zyngier gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 2289e643d803SMarc Zyngier } 2290e643d803SMarc Zyngier 2291e643d803SMarc Zyngier static void its_vpe_deschedule(struct its_vpe *vpe) 2292e643d803SMarc Zyngier { 2293e643d803SMarc Zyngier void * __iomem vlpi_base = gic_data_rdist_vlpi_base(); 2294e643d803SMarc Zyngier u32 count = 1000000; /* 1s! */ 2295e643d803SMarc Zyngier bool clean; 2296e643d803SMarc Zyngier u64 val; 2297e643d803SMarc Zyngier 2298e643d803SMarc Zyngier /* We're being scheduled out */ 2299e643d803SMarc Zyngier val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 2300e643d803SMarc Zyngier val &= ~GICR_VPENDBASER_Valid; 2301e643d803SMarc Zyngier gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 2302e643d803SMarc Zyngier 2303e643d803SMarc Zyngier do { 2304e643d803SMarc Zyngier val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 2305e643d803SMarc Zyngier clean = !(val & GICR_VPENDBASER_Dirty); 2306e643d803SMarc Zyngier if (!clean) { 2307e643d803SMarc Zyngier count--; 2308e643d803SMarc Zyngier cpu_relax(); 2309e643d803SMarc Zyngier udelay(1); 2310e643d803SMarc Zyngier } 2311e643d803SMarc Zyngier } while (!clean && count); 2312e643d803SMarc Zyngier 2313e643d803SMarc Zyngier if (unlikely(!clean && !count)) { 2314e643d803SMarc Zyngier pr_err_ratelimited("ITS virtual pending table not cleaning\n"); 2315e643d803SMarc Zyngier vpe->idai = false; 2316e643d803SMarc Zyngier vpe->pending_last = true; 2317e643d803SMarc Zyngier } else { 2318e643d803SMarc Zyngier vpe->idai = !!(val & GICR_VPENDBASER_IDAI); 2319e643d803SMarc Zyngier vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); 2320e643d803SMarc Zyngier } 2321e643d803SMarc Zyngier } 2322e643d803SMarc Zyngier 2323e643d803SMarc Zyngier static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 2324e643d803SMarc Zyngier { 2325e643d803SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2326e643d803SMarc Zyngier struct its_cmd_info *info = vcpu_info; 2327e643d803SMarc Zyngier 2328e643d803SMarc Zyngier switch (info->cmd_type) { 2329e643d803SMarc Zyngier case SCHEDULE_VPE: 2330e643d803SMarc Zyngier its_vpe_schedule(vpe); 2331e643d803SMarc Zyngier return 0; 2332e643d803SMarc Zyngier 2333e643d803SMarc Zyngier case DESCHEDULE_VPE: 2334e643d803SMarc Zyngier its_vpe_deschedule(vpe); 2335e643d803SMarc Zyngier return 0; 2336e643d803SMarc Zyngier 23375e2f7642SMarc Zyngier case INVALL_VPE: 23385e2f7642SMarc Zyngier its_send_vinvall(vpe); 23395e2f7642SMarc Zyngier return 0; 23405e2f7642SMarc Zyngier 2341e643d803SMarc Zyngier default: 2342e643d803SMarc Zyngier return -EINVAL; 2343e643d803SMarc Zyngier } 2344e643d803SMarc Zyngier } 2345e643d803SMarc Zyngier 2346f6a91da7SMarc Zyngier static void its_vpe_send_inv(struct irq_data *d) 2347f6a91da7SMarc Zyngier { 2348f6a91da7SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2349f6a91da7SMarc Zyngier void __iomem *rdbase; 2350f6a91da7SMarc Zyngier 2351f6a91da7SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 2352f6a91da7SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR); 2353f6a91da7SMarc Zyngier while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) 2354f6a91da7SMarc Zyngier cpu_relax(); 2355f6a91da7SMarc Zyngier } 2356f6a91da7SMarc Zyngier 2357f6a91da7SMarc Zyngier static void its_vpe_mask_irq(struct irq_data *d) 2358f6a91da7SMarc Zyngier { 2359f6a91da7SMarc Zyngier /* 2360f6a91da7SMarc Zyngier * We need to unmask the LPI, which is described by the parent 2361f6a91da7SMarc Zyngier * irq_data. Instead of calling into the parent (which won't 2362f6a91da7SMarc Zyngier * exactly do the right thing, let's simply use the 2363f6a91da7SMarc Zyngier * parent_data pointer. Yes, I'm naughty. 2364f6a91da7SMarc Zyngier */ 2365f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); 2366f6a91da7SMarc Zyngier its_vpe_send_inv(d); 2367f6a91da7SMarc Zyngier } 2368f6a91da7SMarc Zyngier 2369f6a91da7SMarc Zyngier static void its_vpe_unmask_irq(struct irq_data *d) 2370f6a91da7SMarc Zyngier { 2371f6a91da7SMarc Zyngier /* Same hack as above... */ 2372f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); 2373f6a91da7SMarc Zyngier its_vpe_send_inv(d); 2374f6a91da7SMarc Zyngier } 2375f6a91da7SMarc Zyngier 23768fff27aeSMarc Zyngier static struct irq_chip its_vpe_irq_chip = { 23778fff27aeSMarc Zyngier .name = "GICv4-vpe", 2378f6a91da7SMarc Zyngier .irq_mask = its_vpe_mask_irq, 2379f6a91da7SMarc Zyngier .irq_unmask = its_vpe_unmask_irq, 2380f6a91da7SMarc Zyngier .irq_eoi = irq_chip_eoi_parent, 23813171a47aSMarc Zyngier .irq_set_affinity = its_vpe_set_affinity, 2382e643d803SMarc Zyngier .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, 23838fff27aeSMarc Zyngier }; 23848fff27aeSMarc Zyngier 23857d75bbb4SMarc Zyngier static int its_vpe_id_alloc(void) 23867d75bbb4SMarc Zyngier { 23877d75bbb4SMarc Zyngier return ida_simple_get(&its_vpeid_ida, 0, 1 << 16, GFP_KERNEL); 23887d75bbb4SMarc Zyngier } 23897d75bbb4SMarc Zyngier 23907d75bbb4SMarc Zyngier static void its_vpe_id_free(u16 id) 23917d75bbb4SMarc Zyngier { 23927d75bbb4SMarc Zyngier ida_simple_remove(&its_vpeid_ida, id); 23937d75bbb4SMarc Zyngier } 23947d75bbb4SMarc Zyngier 23957d75bbb4SMarc Zyngier static int its_vpe_init(struct its_vpe *vpe) 23967d75bbb4SMarc Zyngier { 23977d75bbb4SMarc Zyngier struct page *vpt_page; 23987d75bbb4SMarc Zyngier int vpe_id; 23997d75bbb4SMarc Zyngier 24007d75bbb4SMarc Zyngier /* Allocate vpe_id */ 24017d75bbb4SMarc Zyngier vpe_id = its_vpe_id_alloc(); 24027d75bbb4SMarc Zyngier if (vpe_id < 0) 24037d75bbb4SMarc Zyngier return vpe_id; 24047d75bbb4SMarc Zyngier 24057d75bbb4SMarc Zyngier /* Allocate VPT */ 24067d75bbb4SMarc Zyngier vpt_page = its_allocate_pending_table(GFP_KERNEL); 24077d75bbb4SMarc Zyngier if (!vpt_page) { 24087d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 24097d75bbb4SMarc Zyngier return -ENOMEM; 24107d75bbb4SMarc Zyngier } 24117d75bbb4SMarc Zyngier 24127d75bbb4SMarc Zyngier if (!its_alloc_vpe_table(vpe_id)) { 24137d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 24147d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 24157d75bbb4SMarc Zyngier return -ENOMEM; 24167d75bbb4SMarc Zyngier } 24177d75bbb4SMarc Zyngier 24187d75bbb4SMarc Zyngier vpe->vpe_id = vpe_id; 24197d75bbb4SMarc Zyngier vpe->vpt_page = vpt_page; 24207d75bbb4SMarc Zyngier 24217d75bbb4SMarc Zyngier return 0; 24227d75bbb4SMarc Zyngier } 24237d75bbb4SMarc Zyngier 24247d75bbb4SMarc Zyngier static void its_vpe_teardown(struct its_vpe *vpe) 24257d75bbb4SMarc Zyngier { 24267d75bbb4SMarc Zyngier its_vpe_id_free(vpe->vpe_id); 24277d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 24287d75bbb4SMarc Zyngier } 24297d75bbb4SMarc Zyngier 24307d75bbb4SMarc Zyngier static void its_vpe_irq_domain_free(struct irq_domain *domain, 24317d75bbb4SMarc Zyngier unsigned int virq, 24327d75bbb4SMarc Zyngier unsigned int nr_irqs) 24337d75bbb4SMarc Zyngier { 24347d75bbb4SMarc Zyngier struct its_vm *vm = domain->host_data; 24357d75bbb4SMarc Zyngier int i; 24367d75bbb4SMarc Zyngier 24377d75bbb4SMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 24387d75bbb4SMarc Zyngier 24397d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 24407d75bbb4SMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 24417d75bbb4SMarc Zyngier virq + i); 24427d75bbb4SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(data); 24437d75bbb4SMarc Zyngier 24447d75bbb4SMarc Zyngier BUG_ON(vm != vpe->its_vm); 24457d75bbb4SMarc Zyngier 24467d75bbb4SMarc Zyngier clear_bit(data->hwirq, vm->db_bitmap); 24477d75bbb4SMarc Zyngier its_vpe_teardown(vpe); 24487d75bbb4SMarc Zyngier irq_domain_reset_irq_data(data); 24497d75bbb4SMarc Zyngier } 24507d75bbb4SMarc Zyngier 24517d75bbb4SMarc Zyngier if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { 24527d75bbb4SMarc Zyngier its_lpi_free_chunks(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); 24537d75bbb4SMarc Zyngier its_free_prop_table(vm->vprop_page); 24547d75bbb4SMarc Zyngier } 24557d75bbb4SMarc Zyngier } 24567d75bbb4SMarc Zyngier 24577d75bbb4SMarc Zyngier static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 24587d75bbb4SMarc Zyngier unsigned int nr_irqs, void *args) 24597d75bbb4SMarc Zyngier { 24607d75bbb4SMarc Zyngier struct its_vm *vm = args; 24617d75bbb4SMarc Zyngier unsigned long *bitmap; 24627d75bbb4SMarc Zyngier struct page *vprop_page; 24637d75bbb4SMarc Zyngier int base, nr_ids, i, err = 0; 24647d75bbb4SMarc Zyngier 24657d75bbb4SMarc Zyngier BUG_ON(!vm); 24667d75bbb4SMarc Zyngier 24677d75bbb4SMarc Zyngier bitmap = its_lpi_alloc_chunks(nr_irqs, &base, &nr_ids); 24687d75bbb4SMarc Zyngier if (!bitmap) 24697d75bbb4SMarc Zyngier return -ENOMEM; 24707d75bbb4SMarc Zyngier 24717d75bbb4SMarc Zyngier if (nr_ids < nr_irqs) { 24727d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 24737d75bbb4SMarc Zyngier return -ENOMEM; 24747d75bbb4SMarc Zyngier } 24757d75bbb4SMarc Zyngier 24767d75bbb4SMarc Zyngier vprop_page = its_allocate_prop_table(GFP_KERNEL); 24777d75bbb4SMarc Zyngier if (!vprop_page) { 24787d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 24797d75bbb4SMarc Zyngier return -ENOMEM; 24807d75bbb4SMarc Zyngier } 24817d75bbb4SMarc Zyngier 24827d75bbb4SMarc Zyngier vm->db_bitmap = bitmap; 24837d75bbb4SMarc Zyngier vm->db_lpi_base = base; 24847d75bbb4SMarc Zyngier vm->nr_db_lpis = nr_ids; 24857d75bbb4SMarc Zyngier vm->vprop_page = vprop_page; 24867d75bbb4SMarc Zyngier 24877d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 24887d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi = base + i; 24897d75bbb4SMarc Zyngier err = its_vpe_init(vm->vpes[i]); 24907d75bbb4SMarc Zyngier if (err) 24917d75bbb4SMarc Zyngier break; 24927d75bbb4SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, 24937d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi); 24947d75bbb4SMarc Zyngier if (err) 24957d75bbb4SMarc Zyngier break; 24967d75bbb4SMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, i, 24977d75bbb4SMarc Zyngier &its_vpe_irq_chip, vm->vpes[i]); 24987d75bbb4SMarc Zyngier set_bit(i, bitmap); 24997d75bbb4SMarc Zyngier } 25007d75bbb4SMarc Zyngier 25017d75bbb4SMarc Zyngier if (err) { 25027d75bbb4SMarc Zyngier if (i > 0) 25037d75bbb4SMarc Zyngier its_vpe_irq_domain_free(domain, virq, i - 1); 25047d75bbb4SMarc Zyngier 25057d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 25067d75bbb4SMarc Zyngier its_free_prop_table(vprop_page); 25077d75bbb4SMarc Zyngier } 25087d75bbb4SMarc Zyngier 25097d75bbb4SMarc Zyngier return err; 25107d75bbb4SMarc Zyngier } 25117d75bbb4SMarc Zyngier 2512eb78192bSMarc Zyngier static void its_vpe_irq_domain_activate(struct irq_domain *domain, 2513eb78192bSMarc Zyngier struct irq_data *d) 2514eb78192bSMarc Zyngier { 2515eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2516eb78192bSMarc Zyngier 2517eb78192bSMarc Zyngier /* Map the VPE to the first possible CPU */ 2518eb78192bSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 2519eb78192bSMarc Zyngier its_send_vmapp(vpe, true); 2520eb78192bSMarc Zyngier its_send_vinvall(vpe); 2521eb78192bSMarc Zyngier } 2522eb78192bSMarc Zyngier 2523eb78192bSMarc Zyngier static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, 2524eb78192bSMarc Zyngier struct irq_data *d) 2525eb78192bSMarc Zyngier { 2526eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2527eb78192bSMarc Zyngier 2528eb78192bSMarc Zyngier its_send_vmapp(vpe, false); 2529eb78192bSMarc Zyngier } 2530eb78192bSMarc Zyngier 25318fff27aeSMarc Zyngier static const struct irq_domain_ops its_vpe_domain_ops = { 25327d75bbb4SMarc Zyngier .alloc = its_vpe_irq_domain_alloc, 25337d75bbb4SMarc Zyngier .free = its_vpe_irq_domain_free, 2534eb78192bSMarc Zyngier .activate = its_vpe_irq_domain_activate, 2535eb78192bSMarc Zyngier .deactivate = its_vpe_irq_domain_deactivate, 25368fff27aeSMarc Zyngier }; 25378fff27aeSMarc Zyngier 25384559fbb3SYun Wu static int its_force_quiescent(void __iomem *base) 25394559fbb3SYun Wu { 25404559fbb3SYun Wu u32 count = 1000000; /* 1s */ 25414559fbb3SYun Wu u32 val; 25424559fbb3SYun Wu 25434559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 25447611da86SDavid Daney /* 25457611da86SDavid Daney * GIC architecture specification requires the ITS to be both 25467611da86SDavid Daney * disabled and quiescent for writes to GITS_BASER<n> or 25477611da86SDavid Daney * GITS_CBASER to not have UNPREDICTABLE results. 25487611da86SDavid Daney */ 25497611da86SDavid Daney if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) 25504559fbb3SYun Wu return 0; 25514559fbb3SYun Wu 25524559fbb3SYun Wu /* Disable the generation of all interrupts to this ITS */ 25534559fbb3SYun Wu val &= ~GITS_CTLR_ENABLE; 25544559fbb3SYun Wu writel_relaxed(val, base + GITS_CTLR); 25554559fbb3SYun Wu 25564559fbb3SYun Wu /* Poll GITS_CTLR and wait until ITS becomes quiescent */ 25574559fbb3SYun Wu while (1) { 25584559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 25594559fbb3SYun Wu if (val & GITS_CTLR_QUIESCENT) 25604559fbb3SYun Wu return 0; 25614559fbb3SYun Wu 25624559fbb3SYun Wu count--; 25634559fbb3SYun Wu if (!count) 25644559fbb3SYun Wu return -EBUSY; 25654559fbb3SYun Wu 25664559fbb3SYun Wu cpu_relax(); 25674559fbb3SYun Wu udelay(1); 25684559fbb3SYun Wu } 25694559fbb3SYun Wu } 25704559fbb3SYun Wu 257194100970SRobert Richter static void __maybe_unused its_enable_quirk_cavium_22375(void *data) 257294100970SRobert Richter { 257394100970SRobert Richter struct its_node *its = data; 257494100970SRobert Richter 257594100970SRobert Richter its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; 257694100970SRobert Richter } 257794100970SRobert Richter 2578fbf8f40eSGanapatrao Kulkarni static void __maybe_unused its_enable_quirk_cavium_23144(void *data) 2579fbf8f40eSGanapatrao Kulkarni { 2580fbf8f40eSGanapatrao Kulkarni struct its_node *its = data; 2581fbf8f40eSGanapatrao Kulkarni 2582fbf8f40eSGanapatrao Kulkarni its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; 2583fbf8f40eSGanapatrao Kulkarni } 2584fbf8f40eSGanapatrao Kulkarni 258590922a2dSShanker Donthineni static void __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) 258690922a2dSShanker Donthineni { 258790922a2dSShanker Donthineni struct its_node *its = data; 258890922a2dSShanker Donthineni 258990922a2dSShanker Donthineni /* On QDF2400, the size of the ITE is 16Bytes */ 259090922a2dSShanker Donthineni its->ite_size = 16; 259190922a2dSShanker Donthineni } 259290922a2dSShanker Donthineni 259367510ccaSRobert Richter static const struct gic_quirk its_quirks[] = { 259494100970SRobert Richter #ifdef CONFIG_CAVIUM_ERRATUM_22375 259594100970SRobert Richter { 259694100970SRobert Richter .desc = "ITS: Cavium errata 22375, 24313", 259794100970SRobert Richter .iidr = 0xa100034c, /* ThunderX pass 1.x */ 259894100970SRobert Richter .mask = 0xffff0fff, 259994100970SRobert Richter .init = its_enable_quirk_cavium_22375, 260094100970SRobert Richter }, 260194100970SRobert Richter #endif 2602fbf8f40eSGanapatrao Kulkarni #ifdef CONFIG_CAVIUM_ERRATUM_23144 2603fbf8f40eSGanapatrao Kulkarni { 2604fbf8f40eSGanapatrao Kulkarni .desc = "ITS: Cavium erratum 23144", 2605fbf8f40eSGanapatrao Kulkarni .iidr = 0xa100034c, /* ThunderX pass 1.x */ 2606fbf8f40eSGanapatrao Kulkarni .mask = 0xffff0fff, 2607fbf8f40eSGanapatrao Kulkarni .init = its_enable_quirk_cavium_23144, 2608fbf8f40eSGanapatrao Kulkarni }, 2609fbf8f40eSGanapatrao Kulkarni #endif 261090922a2dSShanker Donthineni #ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 261190922a2dSShanker Donthineni { 261290922a2dSShanker Donthineni .desc = "ITS: QDF2400 erratum 0065", 261390922a2dSShanker Donthineni .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ 261490922a2dSShanker Donthineni .mask = 0xffffffff, 261590922a2dSShanker Donthineni .init = its_enable_quirk_qdf2400_e0065, 261690922a2dSShanker Donthineni }, 261790922a2dSShanker Donthineni #endif 261867510ccaSRobert Richter { 261967510ccaSRobert Richter } 262067510ccaSRobert Richter }; 262167510ccaSRobert Richter 262267510ccaSRobert Richter static void its_enable_quirks(struct its_node *its) 262367510ccaSRobert Richter { 262467510ccaSRobert Richter u32 iidr = readl_relaxed(its->base + GITS_IIDR); 262567510ccaSRobert Richter 262667510ccaSRobert Richter gic_enable_quirks(iidr, its_quirks, its); 262767510ccaSRobert Richter } 262867510ccaSRobert Richter 2629db40f0a7STomasz Nowicki static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) 2630d14ae5e6STomasz Nowicki { 2631d14ae5e6STomasz Nowicki struct irq_domain *inner_domain; 2632d14ae5e6STomasz Nowicki struct msi_domain_info *info; 2633d14ae5e6STomasz Nowicki 2634d14ae5e6STomasz Nowicki info = kzalloc(sizeof(*info), GFP_KERNEL); 2635d14ae5e6STomasz Nowicki if (!info) 2636d14ae5e6STomasz Nowicki return -ENOMEM; 2637d14ae5e6STomasz Nowicki 2638db40f0a7STomasz Nowicki inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); 2639d14ae5e6STomasz Nowicki if (!inner_domain) { 2640d14ae5e6STomasz Nowicki kfree(info); 2641d14ae5e6STomasz Nowicki return -ENOMEM; 2642d14ae5e6STomasz Nowicki } 2643d14ae5e6STomasz Nowicki 2644db40f0a7STomasz Nowicki inner_domain->parent = its_parent; 264596f0d93aSMarc Zyngier irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); 264659768527SEric Auger inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_REMAP; 2647d14ae5e6STomasz Nowicki info->ops = &its_msi_domain_ops; 2648d14ae5e6STomasz Nowicki info->data = its; 2649d14ae5e6STomasz Nowicki inner_domain->host_data = info; 2650d14ae5e6STomasz Nowicki 2651d14ae5e6STomasz Nowicki return 0; 2652d14ae5e6STomasz Nowicki } 2653d14ae5e6STomasz Nowicki 26548fff27aeSMarc Zyngier static int its_init_vpe_domain(void) 26558fff27aeSMarc Zyngier { 26568fff27aeSMarc Zyngier return 0; 26578fff27aeSMarc Zyngier } 26588fff27aeSMarc Zyngier 26593dfa576bSMarc Zyngier static int __init its_compute_its_list_map(struct resource *res, 26603dfa576bSMarc Zyngier void __iomem *its_base) 26613dfa576bSMarc Zyngier { 26623dfa576bSMarc Zyngier int its_number; 26633dfa576bSMarc Zyngier u32 ctlr; 26643dfa576bSMarc Zyngier 26653dfa576bSMarc Zyngier /* 26663dfa576bSMarc Zyngier * This is assumed to be done early enough that we're 26673dfa576bSMarc Zyngier * guaranteed to be single-threaded, hence no 26683dfa576bSMarc Zyngier * locking. Should this change, we should address 26693dfa576bSMarc Zyngier * this. 26703dfa576bSMarc Zyngier */ 26713dfa576bSMarc Zyngier its_number = find_first_zero_bit(&its_list_map, ITS_LIST_MAX); 26723dfa576bSMarc Zyngier if (its_number >= ITS_LIST_MAX) { 26733dfa576bSMarc Zyngier pr_err("ITS@%pa: No ITSList entry available!\n", 26743dfa576bSMarc Zyngier &res->start); 26753dfa576bSMarc Zyngier return -EINVAL; 26763dfa576bSMarc Zyngier } 26773dfa576bSMarc Zyngier 26783dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 26793dfa576bSMarc Zyngier ctlr &= ~GITS_CTLR_ITS_NUMBER; 26803dfa576bSMarc Zyngier ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; 26813dfa576bSMarc Zyngier writel_relaxed(ctlr, its_base + GITS_CTLR); 26823dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 26833dfa576bSMarc Zyngier if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { 26843dfa576bSMarc Zyngier its_number = ctlr & GITS_CTLR_ITS_NUMBER; 26853dfa576bSMarc Zyngier its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; 26863dfa576bSMarc Zyngier } 26873dfa576bSMarc Zyngier 26883dfa576bSMarc Zyngier if (test_and_set_bit(its_number, &its_list_map)) { 26893dfa576bSMarc Zyngier pr_err("ITS@%pa: Duplicate ITSList entry %d\n", 26903dfa576bSMarc Zyngier &res->start, its_number); 26913dfa576bSMarc Zyngier return -EINVAL; 26923dfa576bSMarc Zyngier } 26933dfa576bSMarc Zyngier 26943dfa576bSMarc Zyngier return its_number; 26953dfa576bSMarc Zyngier } 26963dfa576bSMarc Zyngier 2697db40f0a7STomasz Nowicki static int __init its_probe_one(struct resource *res, 2698db40f0a7STomasz Nowicki struct fwnode_handle *handle, int numa_node) 26994c21f3c2SMarc Zyngier { 27004c21f3c2SMarc Zyngier struct its_node *its; 27014c21f3c2SMarc Zyngier void __iomem *its_base; 27023dfa576bSMarc Zyngier u32 val, ctlr; 27033dfa576bSMarc Zyngier u64 baser, tmp, typer; 27044c21f3c2SMarc Zyngier int err; 27054c21f3c2SMarc Zyngier 2706db40f0a7STomasz Nowicki its_base = ioremap(res->start, resource_size(res)); 27074c21f3c2SMarc Zyngier if (!its_base) { 2708db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); 27094c21f3c2SMarc Zyngier return -ENOMEM; 27104c21f3c2SMarc Zyngier } 27114c21f3c2SMarc Zyngier 27124c21f3c2SMarc Zyngier val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; 27134c21f3c2SMarc Zyngier if (val != 0x30 && val != 0x40) { 2714db40f0a7STomasz Nowicki pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); 27154c21f3c2SMarc Zyngier err = -ENODEV; 27164c21f3c2SMarc Zyngier goto out_unmap; 27174c21f3c2SMarc Zyngier } 27184c21f3c2SMarc Zyngier 27194559fbb3SYun Wu err = its_force_quiescent(its_base); 27204559fbb3SYun Wu if (err) { 2721db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); 27224559fbb3SYun Wu goto out_unmap; 27234559fbb3SYun Wu } 27244559fbb3SYun Wu 2725db40f0a7STomasz Nowicki pr_info("ITS %pR\n", res); 27264c21f3c2SMarc Zyngier 27274c21f3c2SMarc Zyngier its = kzalloc(sizeof(*its), GFP_KERNEL); 27284c21f3c2SMarc Zyngier if (!its) { 27294c21f3c2SMarc Zyngier err = -ENOMEM; 27304c21f3c2SMarc Zyngier goto out_unmap; 27314c21f3c2SMarc Zyngier } 27324c21f3c2SMarc Zyngier 27334c21f3c2SMarc Zyngier raw_spin_lock_init(&its->lock); 27344c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->entry); 27354c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->its_device_list); 27363dfa576bSMarc Zyngier typer = gic_read_typer(its_base + GITS_TYPER); 27374c21f3c2SMarc Zyngier its->base = its_base; 2738db40f0a7STomasz Nowicki its->phys_base = res->start; 27393dfa576bSMarc Zyngier its->ite_size = GITS_TYPER_ITT_ENTRY_SIZE(typer); 27403dfa576bSMarc Zyngier its->is_v4 = !!(typer & GITS_TYPER_VLPIS); 27413dfa576bSMarc Zyngier if (its->is_v4) { 27423dfa576bSMarc Zyngier if (!(typer & GITS_TYPER_VMOVP)) { 27433dfa576bSMarc Zyngier err = its_compute_its_list_map(res, its_base); 27443dfa576bSMarc Zyngier if (err < 0) 27453dfa576bSMarc Zyngier goto out_free_its; 27463dfa576bSMarc Zyngier 27473dfa576bSMarc Zyngier pr_info("ITS@%pa: Using ITS number %d\n", 27483dfa576bSMarc Zyngier &res->start, err); 27493dfa576bSMarc Zyngier } else { 27503dfa576bSMarc Zyngier pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); 27513dfa576bSMarc Zyngier } 27523dfa576bSMarc Zyngier } 27533dfa576bSMarc Zyngier 2754db40f0a7STomasz Nowicki its->numa_node = numa_node; 27554c21f3c2SMarc Zyngier 27565bc13c2cSRobert Richter its->cmd_base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 27575bc13c2cSRobert Richter get_order(ITS_CMD_QUEUE_SZ)); 27584c21f3c2SMarc Zyngier if (!its->cmd_base) { 27594c21f3c2SMarc Zyngier err = -ENOMEM; 27604c21f3c2SMarc Zyngier goto out_free_its; 27614c21f3c2SMarc Zyngier } 27624c21f3c2SMarc Zyngier its->cmd_write = its->cmd_base; 27634c21f3c2SMarc Zyngier 276467510ccaSRobert Richter its_enable_quirks(its); 276567510ccaSRobert Richter 27660e0b0f69SShanker Donthineni err = its_alloc_tables(its); 27674c21f3c2SMarc Zyngier if (err) 27684c21f3c2SMarc Zyngier goto out_free_cmd; 27694c21f3c2SMarc Zyngier 27704c21f3c2SMarc Zyngier err = its_alloc_collections(its); 27714c21f3c2SMarc Zyngier if (err) 27724c21f3c2SMarc Zyngier goto out_free_tables; 27734c21f3c2SMarc Zyngier 27744c21f3c2SMarc Zyngier baser = (virt_to_phys(its->cmd_base) | 27752fd632a0SShanker Donthineni GITS_CBASER_RaWaWb | 27764c21f3c2SMarc Zyngier GITS_CBASER_InnerShareable | 27774c21f3c2SMarc Zyngier (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | 27784c21f3c2SMarc Zyngier GITS_CBASER_VALID); 27794c21f3c2SMarc Zyngier 27800968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 27810968a619SVladimir Murzin tmp = gits_read_cbaser(its->base + GITS_CBASER); 27824c21f3c2SMarc Zyngier 27834ad3e363SMarc Zyngier if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { 2784241a386cSMarc Zyngier if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { 2785241a386cSMarc Zyngier /* 2786241a386cSMarc Zyngier * The HW reports non-shareable, we must 2787241a386cSMarc Zyngier * remove the cacheability attributes as 2788241a386cSMarc Zyngier * well. 2789241a386cSMarc Zyngier */ 2790241a386cSMarc Zyngier baser &= ~(GITS_CBASER_SHAREABILITY_MASK | 2791241a386cSMarc Zyngier GITS_CBASER_CACHEABILITY_MASK); 2792241a386cSMarc Zyngier baser |= GITS_CBASER_nC; 27930968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 2794241a386cSMarc Zyngier } 27954c21f3c2SMarc Zyngier pr_info("ITS: using cache flushing for cmd queue\n"); 27964c21f3c2SMarc Zyngier its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; 27974c21f3c2SMarc Zyngier } 27984c21f3c2SMarc Zyngier 27990968a619SVladimir Murzin gits_write_cwriter(0, its->base + GITS_CWRITER); 28003dfa576bSMarc Zyngier ctlr = readl_relaxed(its->base + GITS_CTLR); 28013dfa576bSMarc Zyngier writel_relaxed(ctlr | GITS_CTLR_ENABLE, its->base + GITS_CTLR); 2802241a386cSMarc Zyngier 2803db40f0a7STomasz Nowicki err = its_init_domain(handle, its); 2804d14ae5e6STomasz Nowicki if (err) 280554456db9SMarc Zyngier goto out_free_tables; 28064c21f3c2SMarc Zyngier 28074c21f3c2SMarc Zyngier spin_lock(&its_lock); 28084c21f3c2SMarc Zyngier list_add(&its->entry, &its_nodes); 28094c21f3c2SMarc Zyngier spin_unlock(&its_lock); 28104c21f3c2SMarc Zyngier 28114c21f3c2SMarc Zyngier return 0; 28124c21f3c2SMarc Zyngier 28134c21f3c2SMarc Zyngier out_free_tables: 28144c21f3c2SMarc Zyngier its_free_tables(its); 28154c21f3c2SMarc Zyngier out_free_cmd: 28165bc13c2cSRobert Richter free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); 28174c21f3c2SMarc Zyngier out_free_its: 28184c21f3c2SMarc Zyngier kfree(its); 28194c21f3c2SMarc Zyngier out_unmap: 28204c21f3c2SMarc Zyngier iounmap(its_base); 2821db40f0a7STomasz Nowicki pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); 28224c21f3c2SMarc Zyngier return err; 28234c21f3c2SMarc Zyngier } 28244c21f3c2SMarc Zyngier 28254c21f3c2SMarc Zyngier static bool gic_rdists_supports_plpis(void) 28264c21f3c2SMarc Zyngier { 2827589ce5f4SMarc Zyngier return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); 28284c21f3c2SMarc Zyngier } 28294c21f3c2SMarc Zyngier 28304c21f3c2SMarc Zyngier int its_cpu_init(void) 28314c21f3c2SMarc Zyngier { 283216acae72SVladimir Murzin if (!list_empty(&its_nodes)) { 28334c21f3c2SMarc Zyngier if (!gic_rdists_supports_plpis()) { 28344c21f3c2SMarc Zyngier pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); 28354c21f3c2SMarc Zyngier return -ENXIO; 28364c21f3c2SMarc Zyngier } 28374c21f3c2SMarc Zyngier its_cpu_init_lpis(); 28384c21f3c2SMarc Zyngier its_cpu_init_collection(); 28394c21f3c2SMarc Zyngier } 28404c21f3c2SMarc Zyngier 28414c21f3c2SMarc Zyngier return 0; 28424c21f3c2SMarc Zyngier } 28434c21f3c2SMarc Zyngier 2844935bba7cSArvind Yadav static const struct of_device_id its_device_id[] = { 28454c21f3c2SMarc Zyngier { .compatible = "arm,gic-v3-its", }, 28464c21f3c2SMarc Zyngier {}, 28474c21f3c2SMarc Zyngier }; 28484c21f3c2SMarc Zyngier 2849db40f0a7STomasz Nowicki static int __init its_of_probe(struct device_node *node) 28504c21f3c2SMarc Zyngier { 28514c21f3c2SMarc Zyngier struct device_node *np; 2852db40f0a7STomasz Nowicki struct resource res; 28534c21f3c2SMarc Zyngier 28544c21f3c2SMarc Zyngier for (np = of_find_matching_node(node, its_device_id); np; 28554c21f3c2SMarc Zyngier np = of_find_matching_node(np, its_device_id)) { 2856d14ae5e6STomasz Nowicki if (!of_property_read_bool(np, "msi-controller")) { 2857e81f54c6SRob Herring pr_warn("%pOF: no msi-controller property, ITS ignored\n", 2858e81f54c6SRob Herring np); 2859d14ae5e6STomasz Nowicki continue; 2860d14ae5e6STomasz Nowicki } 2861d14ae5e6STomasz Nowicki 2862db40f0a7STomasz Nowicki if (of_address_to_resource(np, 0, &res)) { 2863e81f54c6SRob Herring pr_warn("%pOF: no regs?\n", np); 2864db40f0a7STomasz Nowicki continue; 28654c21f3c2SMarc Zyngier } 28664c21f3c2SMarc Zyngier 2867db40f0a7STomasz Nowicki its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); 2868db40f0a7STomasz Nowicki } 2869db40f0a7STomasz Nowicki return 0; 2870db40f0a7STomasz Nowicki } 2871db40f0a7STomasz Nowicki 28723f010cf1STomasz Nowicki #ifdef CONFIG_ACPI 28733f010cf1STomasz Nowicki 28743f010cf1STomasz Nowicki #define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) 28753f010cf1STomasz Nowicki 2876dbd2b826SGanapatrao Kulkarni #if defined(CONFIG_ACPI_NUMA) && (ACPI_CA_VERSION >= 0x20170531) 2877dbd2b826SGanapatrao Kulkarni struct its_srat_map { 2878dbd2b826SGanapatrao Kulkarni /* numa node id */ 2879dbd2b826SGanapatrao Kulkarni u32 numa_node; 2880dbd2b826SGanapatrao Kulkarni /* GIC ITS ID */ 2881dbd2b826SGanapatrao Kulkarni u32 its_id; 2882dbd2b826SGanapatrao Kulkarni }; 2883dbd2b826SGanapatrao Kulkarni 2884dbd2b826SGanapatrao Kulkarni static struct its_srat_map its_srat_maps[MAX_NUMNODES] __initdata; 2885dbd2b826SGanapatrao Kulkarni static int its_in_srat __initdata; 2886dbd2b826SGanapatrao Kulkarni 2887dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) 2888dbd2b826SGanapatrao Kulkarni { 2889dbd2b826SGanapatrao Kulkarni int i; 2890dbd2b826SGanapatrao Kulkarni 2891dbd2b826SGanapatrao Kulkarni for (i = 0; i < its_in_srat; i++) { 2892dbd2b826SGanapatrao Kulkarni if (its_id == its_srat_maps[i].its_id) 2893dbd2b826SGanapatrao Kulkarni return its_srat_maps[i].numa_node; 2894dbd2b826SGanapatrao Kulkarni } 2895dbd2b826SGanapatrao Kulkarni return NUMA_NO_NODE; 2896dbd2b826SGanapatrao Kulkarni } 2897dbd2b826SGanapatrao Kulkarni 2898dbd2b826SGanapatrao Kulkarni static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header, 2899dbd2b826SGanapatrao Kulkarni const unsigned long end) 2900dbd2b826SGanapatrao Kulkarni { 2901dbd2b826SGanapatrao Kulkarni int node; 2902dbd2b826SGanapatrao Kulkarni struct acpi_srat_gic_its_affinity *its_affinity; 2903dbd2b826SGanapatrao Kulkarni 2904dbd2b826SGanapatrao Kulkarni its_affinity = (struct acpi_srat_gic_its_affinity *)header; 2905dbd2b826SGanapatrao Kulkarni if (!its_affinity) 2906dbd2b826SGanapatrao Kulkarni return -EINVAL; 2907dbd2b826SGanapatrao Kulkarni 2908dbd2b826SGanapatrao Kulkarni if (its_affinity->header.length < sizeof(*its_affinity)) { 2909dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid header length %d in ITS affinity\n", 2910dbd2b826SGanapatrao Kulkarni its_affinity->header.length); 2911dbd2b826SGanapatrao Kulkarni return -EINVAL; 2912dbd2b826SGanapatrao Kulkarni } 2913dbd2b826SGanapatrao Kulkarni 2914dbd2b826SGanapatrao Kulkarni if (its_in_srat >= MAX_NUMNODES) { 2915dbd2b826SGanapatrao Kulkarni pr_err("SRAT: ITS affinity exceeding max count[%d]\n", 2916dbd2b826SGanapatrao Kulkarni MAX_NUMNODES); 2917dbd2b826SGanapatrao Kulkarni return -EINVAL; 2918dbd2b826SGanapatrao Kulkarni } 2919dbd2b826SGanapatrao Kulkarni 2920dbd2b826SGanapatrao Kulkarni node = acpi_map_pxm_to_node(its_affinity->proximity_domain); 2921dbd2b826SGanapatrao Kulkarni 2922dbd2b826SGanapatrao Kulkarni if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { 2923dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); 2924dbd2b826SGanapatrao Kulkarni return 0; 2925dbd2b826SGanapatrao Kulkarni } 2926dbd2b826SGanapatrao Kulkarni 2927dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].numa_node = node; 2928dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].its_id = its_affinity->its_id; 2929dbd2b826SGanapatrao Kulkarni its_in_srat++; 2930dbd2b826SGanapatrao Kulkarni pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", 2931dbd2b826SGanapatrao Kulkarni its_affinity->proximity_domain, its_affinity->its_id, node); 2932dbd2b826SGanapatrao Kulkarni 2933dbd2b826SGanapatrao Kulkarni return 0; 2934dbd2b826SGanapatrao Kulkarni } 2935dbd2b826SGanapatrao Kulkarni 2936dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) 2937dbd2b826SGanapatrao Kulkarni { 2938dbd2b826SGanapatrao Kulkarni acpi_table_parse_entries(ACPI_SIG_SRAT, 2939dbd2b826SGanapatrao Kulkarni sizeof(struct acpi_table_srat), 2940dbd2b826SGanapatrao Kulkarni ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 2941dbd2b826SGanapatrao Kulkarni gic_acpi_parse_srat_its, 0); 2942dbd2b826SGanapatrao Kulkarni } 2943dbd2b826SGanapatrao Kulkarni #else 2944dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) { } 2945dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } 2946dbd2b826SGanapatrao Kulkarni #endif 2947dbd2b826SGanapatrao Kulkarni 29483f010cf1STomasz Nowicki static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header, 29493f010cf1STomasz Nowicki const unsigned long end) 29503f010cf1STomasz Nowicki { 29513f010cf1STomasz Nowicki struct acpi_madt_generic_translator *its_entry; 29523f010cf1STomasz Nowicki struct fwnode_handle *dom_handle; 29533f010cf1STomasz Nowicki struct resource res; 29543f010cf1STomasz Nowicki int err; 29553f010cf1STomasz Nowicki 29563f010cf1STomasz Nowicki its_entry = (struct acpi_madt_generic_translator *)header; 29573f010cf1STomasz Nowicki memset(&res, 0, sizeof(res)); 29583f010cf1STomasz Nowicki res.start = its_entry->base_address; 29593f010cf1STomasz Nowicki res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; 29603f010cf1STomasz Nowicki res.flags = IORESOURCE_MEM; 29613f010cf1STomasz Nowicki 29623f010cf1STomasz Nowicki dom_handle = irq_domain_alloc_fwnode((void *)its_entry->base_address); 29633f010cf1STomasz Nowicki if (!dom_handle) { 29643f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", 29653f010cf1STomasz Nowicki &res.start); 29663f010cf1STomasz Nowicki return -ENOMEM; 29673f010cf1STomasz Nowicki } 29683f010cf1STomasz Nowicki 29693f010cf1STomasz Nowicki err = iort_register_domain_token(its_entry->translation_id, dom_handle); 29703f010cf1STomasz Nowicki if (err) { 29713f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", 29723f010cf1STomasz Nowicki &res.start, its_entry->translation_id); 29733f010cf1STomasz Nowicki goto dom_err; 29743f010cf1STomasz Nowicki } 29753f010cf1STomasz Nowicki 2976dbd2b826SGanapatrao Kulkarni err = its_probe_one(&res, dom_handle, 2977dbd2b826SGanapatrao Kulkarni acpi_get_its_numa_node(its_entry->translation_id)); 29783f010cf1STomasz Nowicki if (!err) 29793f010cf1STomasz Nowicki return 0; 29803f010cf1STomasz Nowicki 29813f010cf1STomasz Nowicki iort_deregister_domain_token(its_entry->translation_id); 29823f010cf1STomasz Nowicki dom_err: 29833f010cf1STomasz Nowicki irq_domain_free_fwnode(dom_handle); 29843f010cf1STomasz Nowicki return err; 29853f010cf1STomasz Nowicki } 29863f010cf1STomasz Nowicki 29873f010cf1STomasz Nowicki static void __init its_acpi_probe(void) 29883f010cf1STomasz Nowicki { 2989dbd2b826SGanapatrao Kulkarni acpi_table_parse_srat_its(); 29903f010cf1STomasz Nowicki acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, 29913f010cf1STomasz Nowicki gic_acpi_parse_madt_its, 0); 29923f010cf1STomasz Nowicki } 29933f010cf1STomasz Nowicki #else 29943f010cf1STomasz Nowicki static void __init its_acpi_probe(void) { } 29953f010cf1STomasz Nowicki #endif 29963f010cf1STomasz Nowicki 2997db40f0a7STomasz Nowicki int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, 2998db40f0a7STomasz Nowicki struct irq_domain *parent_domain) 2999db40f0a7STomasz Nowicki { 3000db40f0a7STomasz Nowicki struct device_node *of_node; 30018fff27aeSMarc Zyngier struct its_node *its; 30028fff27aeSMarc Zyngier bool has_v4 = false; 30038fff27aeSMarc Zyngier int err; 3004db40f0a7STomasz Nowicki 3005db40f0a7STomasz Nowicki its_parent = parent_domain; 3006db40f0a7STomasz Nowicki of_node = to_of_node(handle); 3007db40f0a7STomasz Nowicki if (of_node) 3008db40f0a7STomasz Nowicki its_of_probe(of_node); 3009db40f0a7STomasz Nowicki else 30103f010cf1STomasz Nowicki its_acpi_probe(); 3011db40f0a7STomasz Nowicki 30124c21f3c2SMarc Zyngier if (list_empty(&its_nodes)) { 30134c21f3c2SMarc Zyngier pr_warn("ITS: No ITS available, not enabling LPIs\n"); 30144c21f3c2SMarc Zyngier return -ENXIO; 30154c21f3c2SMarc Zyngier } 30164c21f3c2SMarc Zyngier 30174c21f3c2SMarc Zyngier gic_rdists = rdists; 30188fff27aeSMarc Zyngier err = its_alloc_lpi_tables(); 30198fff27aeSMarc Zyngier if (err) 30208fff27aeSMarc Zyngier return err; 30218fff27aeSMarc Zyngier 30228fff27aeSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) 30238fff27aeSMarc Zyngier has_v4 |= its->is_v4; 30248fff27aeSMarc Zyngier 30258fff27aeSMarc Zyngier if (has_v4 & rdists->has_vlpis) { 30268fff27aeSMarc Zyngier if (its_init_vpe_domain()) { 30278fff27aeSMarc Zyngier rdists->has_vlpis = false; 30288fff27aeSMarc Zyngier pr_err("ITS: Disabling GICv4 support\n"); 30298fff27aeSMarc Zyngier } 30308fff27aeSMarc Zyngier } 30318fff27aeSMarc Zyngier 30328fff27aeSMarc Zyngier return 0; 30334c21f3c2SMarc Zyngier } 3034