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 13920b3d54eSMarc Zyngier static struct { 14020b3d54eSMarc Zyngier raw_spinlock_t lock; 14120b3d54eSMarc Zyngier struct its_device *dev; 14220b3d54eSMarc Zyngier struct its_vpe **vpes; 14320b3d54eSMarc Zyngier int next_victim; 14420b3d54eSMarc Zyngier } vpe_proxy; 14520b3d54eSMarc Zyngier 1461ac19ca6SMarc Zyngier static LIST_HEAD(its_nodes); 1471ac19ca6SMarc Zyngier static DEFINE_SPINLOCK(its_lock); 1481ac19ca6SMarc Zyngier static struct rdists *gic_rdists; 149db40f0a7STomasz Nowicki static struct irq_domain *its_parent; 1501ac19ca6SMarc Zyngier 1513dfa576bSMarc Zyngier /* 1523dfa576bSMarc Zyngier * We have a maximum number of 16 ITSs in the whole system if we're 1533dfa576bSMarc Zyngier * using the ITSList mechanism 1543dfa576bSMarc Zyngier */ 1553dfa576bSMarc Zyngier #define ITS_LIST_MAX 16 1563dfa576bSMarc Zyngier 1573dfa576bSMarc Zyngier static unsigned long its_list_map; 1583171a47aSMarc Zyngier static u16 vmovp_seq_num; 1593171a47aSMarc Zyngier static DEFINE_RAW_SPINLOCK(vmovp_lock); 1603171a47aSMarc Zyngier 1617d75bbb4SMarc Zyngier static DEFINE_IDA(its_vpeid_ida); 1623dfa576bSMarc Zyngier 1631ac19ca6SMarc Zyngier #define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) 1641ac19ca6SMarc Zyngier #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) 165e643d803SMarc Zyngier #define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) 1661ac19ca6SMarc Zyngier 167591e5becSMarc Zyngier static struct its_collection *dev_event_to_col(struct its_device *its_dev, 168591e5becSMarc Zyngier u32 event) 169591e5becSMarc Zyngier { 170591e5becSMarc Zyngier struct its_node *its = its_dev->its; 171591e5becSMarc Zyngier 172591e5becSMarc Zyngier return its->collections + its_dev->event_map.col_map[event]; 173591e5becSMarc Zyngier } 174591e5becSMarc Zyngier 175cc2d3216SMarc Zyngier /* 176cc2d3216SMarc Zyngier * ITS command descriptors - parameters to be encoded in a command 177cc2d3216SMarc Zyngier * block. 178cc2d3216SMarc Zyngier */ 179cc2d3216SMarc Zyngier struct its_cmd_desc { 180cc2d3216SMarc Zyngier union { 181cc2d3216SMarc Zyngier struct { 182cc2d3216SMarc Zyngier struct its_device *dev; 183cc2d3216SMarc Zyngier u32 event_id; 184cc2d3216SMarc Zyngier } its_inv_cmd; 185cc2d3216SMarc Zyngier 186cc2d3216SMarc Zyngier struct { 187cc2d3216SMarc Zyngier struct its_device *dev; 188cc2d3216SMarc Zyngier u32 event_id; 1898d85dcedSMarc Zyngier } its_clear_cmd; 1908d85dcedSMarc Zyngier 1918d85dcedSMarc Zyngier struct { 1928d85dcedSMarc Zyngier struct its_device *dev; 1938d85dcedSMarc Zyngier u32 event_id; 194cc2d3216SMarc Zyngier } its_int_cmd; 195cc2d3216SMarc Zyngier 196cc2d3216SMarc Zyngier struct { 197cc2d3216SMarc Zyngier struct its_device *dev; 198cc2d3216SMarc Zyngier int valid; 199cc2d3216SMarc Zyngier } its_mapd_cmd; 200cc2d3216SMarc Zyngier 201cc2d3216SMarc Zyngier struct { 202cc2d3216SMarc Zyngier struct its_collection *col; 203cc2d3216SMarc Zyngier int valid; 204cc2d3216SMarc Zyngier } its_mapc_cmd; 205cc2d3216SMarc Zyngier 206cc2d3216SMarc Zyngier struct { 207cc2d3216SMarc Zyngier struct its_device *dev; 208cc2d3216SMarc Zyngier u32 phys_id; 209cc2d3216SMarc Zyngier u32 event_id; 2106a25ad3aSMarc Zyngier } its_mapti_cmd; 211cc2d3216SMarc Zyngier 212cc2d3216SMarc Zyngier struct { 213cc2d3216SMarc Zyngier struct its_device *dev; 214cc2d3216SMarc Zyngier struct its_collection *col; 215591e5becSMarc Zyngier u32 event_id; 216cc2d3216SMarc Zyngier } its_movi_cmd; 217cc2d3216SMarc Zyngier 218cc2d3216SMarc Zyngier struct { 219cc2d3216SMarc Zyngier struct its_device *dev; 220cc2d3216SMarc Zyngier u32 event_id; 221cc2d3216SMarc Zyngier } its_discard_cmd; 222cc2d3216SMarc Zyngier 223cc2d3216SMarc Zyngier struct { 224cc2d3216SMarc Zyngier struct its_collection *col; 225cc2d3216SMarc Zyngier } its_invall_cmd; 226d011e4e6SMarc Zyngier 227d011e4e6SMarc Zyngier struct { 228d011e4e6SMarc Zyngier struct its_vpe *vpe; 229eb78192bSMarc Zyngier } its_vinvall_cmd; 230eb78192bSMarc Zyngier 231eb78192bSMarc Zyngier struct { 232eb78192bSMarc Zyngier struct its_vpe *vpe; 233eb78192bSMarc Zyngier struct its_collection *col; 234eb78192bSMarc Zyngier bool valid; 235eb78192bSMarc Zyngier } its_vmapp_cmd; 236eb78192bSMarc Zyngier 237eb78192bSMarc Zyngier struct { 238eb78192bSMarc Zyngier struct its_vpe *vpe; 239d011e4e6SMarc Zyngier struct its_device *dev; 240d011e4e6SMarc Zyngier u32 virt_id; 241d011e4e6SMarc Zyngier u32 event_id; 242d011e4e6SMarc Zyngier bool db_enabled; 243d011e4e6SMarc Zyngier } its_vmapti_cmd; 244d011e4e6SMarc Zyngier 245d011e4e6SMarc Zyngier struct { 246d011e4e6SMarc Zyngier struct its_vpe *vpe; 247d011e4e6SMarc Zyngier struct its_device *dev; 248d011e4e6SMarc Zyngier u32 event_id; 249d011e4e6SMarc Zyngier bool db_enabled; 250d011e4e6SMarc Zyngier } its_vmovi_cmd; 2513171a47aSMarc Zyngier 2523171a47aSMarc Zyngier struct { 2533171a47aSMarc Zyngier struct its_vpe *vpe; 2543171a47aSMarc Zyngier struct its_collection *col; 2553171a47aSMarc Zyngier u16 seq_num; 2563171a47aSMarc Zyngier u16 its_list; 2573171a47aSMarc Zyngier } its_vmovp_cmd; 258cc2d3216SMarc Zyngier }; 259cc2d3216SMarc Zyngier }; 260cc2d3216SMarc Zyngier 261cc2d3216SMarc Zyngier /* 262cc2d3216SMarc Zyngier * The ITS command block, which is what the ITS actually parses. 263cc2d3216SMarc Zyngier */ 264cc2d3216SMarc Zyngier struct its_cmd_block { 265cc2d3216SMarc Zyngier u64 raw_cmd[4]; 266cc2d3216SMarc Zyngier }; 267cc2d3216SMarc Zyngier 268cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_SZ SZ_64K 269cc2d3216SMarc Zyngier #define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) 270cc2d3216SMarc Zyngier 271cc2d3216SMarc Zyngier typedef struct its_collection *(*its_cmd_builder_t)(struct its_cmd_block *, 272cc2d3216SMarc Zyngier struct its_cmd_desc *); 273cc2d3216SMarc Zyngier 274d011e4e6SMarc Zyngier typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_cmd_block *, 275d011e4e6SMarc Zyngier struct its_cmd_desc *); 276d011e4e6SMarc Zyngier 2774d36f136SMarc Zyngier static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) 2784d36f136SMarc Zyngier { 2794d36f136SMarc Zyngier u64 mask = GENMASK_ULL(h, l); 2804d36f136SMarc Zyngier *raw_cmd &= ~mask; 2814d36f136SMarc Zyngier *raw_cmd |= (val << l) & mask; 2824d36f136SMarc Zyngier } 2834d36f136SMarc Zyngier 284cc2d3216SMarc Zyngier static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) 285cc2d3216SMarc Zyngier { 2864d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); 287cc2d3216SMarc Zyngier } 288cc2d3216SMarc Zyngier 289cc2d3216SMarc Zyngier static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) 290cc2d3216SMarc Zyngier { 2914d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); 292cc2d3216SMarc Zyngier } 293cc2d3216SMarc Zyngier 294cc2d3216SMarc Zyngier static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) 295cc2d3216SMarc Zyngier { 2964d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); 297cc2d3216SMarc Zyngier } 298cc2d3216SMarc Zyngier 299cc2d3216SMarc Zyngier static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) 300cc2d3216SMarc Zyngier { 3014d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); 302cc2d3216SMarc Zyngier } 303cc2d3216SMarc Zyngier 304cc2d3216SMarc Zyngier static void its_encode_size(struct its_cmd_block *cmd, u8 size) 305cc2d3216SMarc Zyngier { 3064d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); 307cc2d3216SMarc Zyngier } 308cc2d3216SMarc Zyngier 309cc2d3216SMarc Zyngier static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) 310cc2d3216SMarc Zyngier { 3114d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 50, 8); 312cc2d3216SMarc Zyngier } 313cc2d3216SMarc Zyngier 314cc2d3216SMarc Zyngier static void its_encode_valid(struct its_cmd_block *cmd, int valid) 315cc2d3216SMarc Zyngier { 3164d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); 317cc2d3216SMarc Zyngier } 318cc2d3216SMarc Zyngier 319cc2d3216SMarc Zyngier static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) 320cc2d3216SMarc Zyngier { 3214d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 50, 16); 322cc2d3216SMarc Zyngier } 323cc2d3216SMarc Zyngier 324cc2d3216SMarc Zyngier static void its_encode_collection(struct its_cmd_block *cmd, u16 col) 325cc2d3216SMarc Zyngier { 3264d36f136SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); 327cc2d3216SMarc Zyngier } 328cc2d3216SMarc Zyngier 329d011e4e6SMarc Zyngier static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) 330d011e4e6SMarc Zyngier { 331d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); 332d011e4e6SMarc Zyngier } 333d011e4e6SMarc Zyngier 334d011e4e6SMarc Zyngier static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) 335d011e4e6SMarc Zyngier { 336d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); 337d011e4e6SMarc Zyngier } 338d011e4e6SMarc Zyngier 339d011e4e6SMarc Zyngier static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) 340d011e4e6SMarc Zyngier { 341d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); 342d011e4e6SMarc Zyngier } 343d011e4e6SMarc Zyngier 344d011e4e6SMarc Zyngier static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) 345d011e4e6SMarc Zyngier { 346d011e4e6SMarc Zyngier its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); 347d011e4e6SMarc Zyngier } 348d011e4e6SMarc Zyngier 3493171a47aSMarc Zyngier static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) 3503171a47aSMarc Zyngier { 3513171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); 3523171a47aSMarc Zyngier } 3533171a47aSMarc Zyngier 3543171a47aSMarc Zyngier static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) 3553171a47aSMarc Zyngier { 3563171a47aSMarc Zyngier its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); 3573171a47aSMarc Zyngier } 3583171a47aSMarc Zyngier 359eb78192bSMarc Zyngier static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) 360eb78192bSMarc Zyngier { 361eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 50, 16); 362eb78192bSMarc Zyngier } 363eb78192bSMarc Zyngier 364eb78192bSMarc Zyngier static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) 365eb78192bSMarc Zyngier { 366eb78192bSMarc Zyngier its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); 367eb78192bSMarc Zyngier } 368eb78192bSMarc Zyngier 369cc2d3216SMarc Zyngier static inline void its_fixup_cmd(struct its_cmd_block *cmd) 370cc2d3216SMarc Zyngier { 371cc2d3216SMarc Zyngier /* Let's fixup BE commands */ 372cc2d3216SMarc Zyngier cmd->raw_cmd[0] = cpu_to_le64(cmd->raw_cmd[0]); 373cc2d3216SMarc Zyngier cmd->raw_cmd[1] = cpu_to_le64(cmd->raw_cmd[1]); 374cc2d3216SMarc Zyngier cmd->raw_cmd[2] = cpu_to_le64(cmd->raw_cmd[2]); 375cc2d3216SMarc Zyngier cmd->raw_cmd[3] = cpu_to_le64(cmd->raw_cmd[3]); 376cc2d3216SMarc Zyngier } 377cc2d3216SMarc Zyngier 378cc2d3216SMarc Zyngier static struct its_collection *its_build_mapd_cmd(struct its_cmd_block *cmd, 379cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 380cc2d3216SMarc Zyngier { 381cc2d3216SMarc Zyngier unsigned long itt_addr; 382c8481267SMarc Zyngier u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); 383cc2d3216SMarc Zyngier 384cc2d3216SMarc Zyngier itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); 385cc2d3216SMarc Zyngier itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); 386cc2d3216SMarc Zyngier 387cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPD); 388cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); 389cc2d3216SMarc Zyngier its_encode_size(cmd, size - 1); 390cc2d3216SMarc Zyngier its_encode_itt(cmd, itt_addr); 391cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapd_cmd.valid); 392cc2d3216SMarc Zyngier 393cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 394cc2d3216SMarc Zyngier 395591e5becSMarc Zyngier return NULL; 396cc2d3216SMarc Zyngier } 397cc2d3216SMarc Zyngier 398cc2d3216SMarc Zyngier static struct its_collection *its_build_mapc_cmd(struct its_cmd_block *cmd, 399cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 400cc2d3216SMarc Zyngier { 401cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPC); 402cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 403cc2d3216SMarc Zyngier its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); 404cc2d3216SMarc Zyngier its_encode_valid(cmd, desc->its_mapc_cmd.valid); 405cc2d3216SMarc Zyngier 406cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 407cc2d3216SMarc Zyngier 408cc2d3216SMarc Zyngier return desc->its_mapc_cmd.col; 409cc2d3216SMarc Zyngier } 410cc2d3216SMarc Zyngier 4116a25ad3aSMarc Zyngier static struct its_collection *its_build_mapti_cmd(struct its_cmd_block *cmd, 412cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 413cc2d3216SMarc Zyngier { 414591e5becSMarc Zyngier struct its_collection *col; 415591e5becSMarc Zyngier 4166a25ad3aSMarc Zyngier col = dev_event_to_col(desc->its_mapti_cmd.dev, 4176a25ad3aSMarc Zyngier desc->its_mapti_cmd.event_id); 418591e5becSMarc Zyngier 4196a25ad3aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MAPTI); 4206a25ad3aSMarc Zyngier its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); 4216a25ad3aSMarc Zyngier its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); 4226a25ad3aSMarc Zyngier its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); 423591e5becSMarc Zyngier its_encode_collection(cmd, col->col_id); 424cc2d3216SMarc Zyngier 425cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 426cc2d3216SMarc Zyngier 427591e5becSMarc Zyngier return col; 428cc2d3216SMarc Zyngier } 429cc2d3216SMarc Zyngier 430cc2d3216SMarc Zyngier static struct its_collection *its_build_movi_cmd(struct its_cmd_block *cmd, 431cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 432cc2d3216SMarc Zyngier { 433591e5becSMarc Zyngier struct its_collection *col; 434591e5becSMarc Zyngier 435591e5becSMarc Zyngier col = dev_event_to_col(desc->its_movi_cmd.dev, 436591e5becSMarc Zyngier desc->its_movi_cmd.event_id); 437591e5becSMarc Zyngier 438cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_MOVI); 439cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); 440591e5becSMarc Zyngier its_encode_event_id(cmd, desc->its_movi_cmd.event_id); 441cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); 442cc2d3216SMarc Zyngier 443cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 444cc2d3216SMarc Zyngier 445591e5becSMarc Zyngier return col; 446cc2d3216SMarc Zyngier } 447cc2d3216SMarc Zyngier 448cc2d3216SMarc Zyngier static struct its_collection *its_build_discard_cmd(struct its_cmd_block *cmd, 449cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 450cc2d3216SMarc Zyngier { 451591e5becSMarc Zyngier struct its_collection *col; 452591e5becSMarc Zyngier 453591e5becSMarc Zyngier col = dev_event_to_col(desc->its_discard_cmd.dev, 454591e5becSMarc Zyngier desc->its_discard_cmd.event_id); 455591e5becSMarc Zyngier 456cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_DISCARD); 457cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); 458cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_discard_cmd.event_id); 459cc2d3216SMarc Zyngier 460cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 461cc2d3216SMarc Zyngier 462591e5becSMarc Zyngier return col; 463cc2d3216SMarc Zyngier } 464cc2d3216SMarc Zyngier 465cc2d3216SMarc Zyngier static struct its_collection *its_build_inv_cmd(struct its_cmd_block *cmd, 466cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 467cc2d3216SMarc Zyngier { 468591e5becSMarc Zyngier struct its_collection *col; 469591e5becSMarc Zyngier 470591e5becSMarc Zyngier col = dev_event_to_col(desc->its_inv_cmd.dev, 471591e5becSMarc Zyngier desc->its_inv_cmd.event_id); 472591e5becSMarc Zyngier 473cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INV); 474cc2d3216SMarc Zyngier its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); 475cc2d3216SMarc Zyngier its_encode_event_id(cmd, desc->its_inv_cmd.event_id); 476cc2d3216SMarc Zyngier 477cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 478cc2d3216SMarc Zyngier 479591e5becSMarc Zyngier return col; 480cc2d3216SMarc Zyngier } 481cc2d3216SMarc Zyngier 4828d85dcedSMarc Zyngier static struct its_collection *its_build_int_cmd(struct its_cmd_block *cmd, 4838d85dcedSMarc Zyngier struct its_cmd_desc *desc) 4848d85dcedSMarc Zyngier { 4858d85dcedSMarc Zyngier struct its_collection *col; 4868d85dcedSMarc Zyngier 4878d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_int_cmd.dev, 4888d85dcedSMarc Zyngier desc->its_int_cmd.event_id); 4898d85dcedSMarc Zyngier 4908d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INT); 4918d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); 4928d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_int_cmd.event_id); 4938d85dcedSMarc Zyngier 4948d85dcedSMarc Zyngier its_fixup_cmd(cmd); 4958d85dcedSMarc Zyngier 4968d85dcedSMarc Zyngier return col; 4978d85dcedSMarc Zyngier } 4988d85dcedSMarc Zyngier 4998d85dcedSMarc Zyngier static struct its_collection *its_build_clear_cmd(struct its_cmd_block *cmd, 5008d85dcedSMarc Zyngier struct its_cmd_desc *desc) 5018d85dcedSMarc Zyngier { 5028d85dcedSMarc Zyngier struct its_collection *col; 5038d85dcedSMarc Zyngier 5048d85dcedSMarc Zyngier col = dev_event_to_col(desc->its_clear_cmd.dev, 5058d85dcedSMarc Zyngier desc->its_clear_cmd.event_id); 5068d85dcedSMarc Zyngier 5078d85dcedSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_CLEAR); 5088d85dcedSMarc Zyngier its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); 5098d85dcedSMarc Zyngier its_encode_event_id(cmd, desc->its_clear_cmd.event_id); 5108d85dcedSMarc Zyngier 5118d85dcedSMarc Zyngier its_fixup_cmd(cmd); 5128d85dcedSMarc Zyngier 5138d85dcedSMarc Zyngier return col; 5148d85dcedSMarc Zyngier } 5158d85dcedSMarc Zyngier 516cc2d3216SMarc Zyngier static struct its_collection *its_build_invall_cmd(struct its_cmd_block *cmd, 517cc2d3216SMarc Zyngier struct its_cmd_desc *desc) 518cc2d3216SMarc Zyngier { 519cc2d3216SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_INVALL); 520cc2d3216SMarc Zyngier its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); 521cc2d3216SMarc Zyngier 522cc2d3216SMarc Zyngier its_fixup_cmd(cmd); 523cc2d3216SMarc Zyngier 524cc2d3216SMarc Zyngier return NULL; 525cc2d3216SMarc Zyngier } 526cc2d3216SMarc Zyngier 527eb78192bSMarc Zyngier static struct its_vpe *its_build_vinvall_cmd(struct its_cmd_block *cmd, 528eb78192bSMarc Zyngier struct its_cmd_desc *desc) 529eb78192bSMarc Zyngier { 530eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VINVALL); 531eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); 532eb78192bSMarc Zyngier 533eb78192bSMarc Zyngier its_fixup_cmd(cmd); 534eb78192bSMarc Zyngier 535eb78192bSMarc Zyngier return desc->its_vinvall_cmd.vpe; 536eb78192bSMarc Zyngier } 537eb78192bSMarc Zyngier 538eb78192bSMarc Zyngier static struct its_vpe *its_build_vmapp_cmd(struct its_cmd_block *cmd, 539eb78192bSMarc Zyngier struct its_cmd_desc *desc) 540eb78192bSMarc Zyngier { 541eb78192bSMarc Zyngier unsigned long vpt_addr; 542eb78192bSMarc Zyngier 543eb78192bSMarc Zyngier vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); 544eb78192bSMarc Zyngier 545eb78192bSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPP); 546eb78192bSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); 547eb78192bSMarc Zyngier its_encode_valid(cmd, desc->its_vmapp_cmd.valid); 548eb78192bSMarc Zyngier its_encode_target(cmd, desc->its_vmapp_cmd.col->target_address); 549eb78192bSMarc Zyngier its_encode_vpt_addr(cmd, vpt_addr); 550eb78192bSMarc Zyngier its_encode_vpt_size(cmd, LPI_NRBITS - 1); 551eb78192bSMarc Zyngier 552eb78192bSMarc Zyngier its_fixup_cmd(cmd); 553eb78192bSMarc Zyngier 554eb78192bSMarc Zyngier return desc->its_vmapp_cmd.vpe; 555eb78192bSMarc Zyngier } 556eb78192bSMarc Zyngier 557d011e4e6SMarc Zyngier static struct its_vpe *its_build_vmapti_cmd(struct its_cmd_block *cmd, 558d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 559d011e4e6SMarc Zyngier { 560d011e4e6SMarc Zyngier u32 db; 561d011e4e6SMarc Zyngier 562d011e4e6SMarc Zyngier if (desc->its_vmapti_cmd.db_enabled) 563d011e4e6SMarc Zyngier db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; 564d011e4e6SMarc Zyngier else 565d011e4e6SMarc Zyngier db = 1023; 566d011e4e6SMarc Zyngier 567d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMAPTI); 568d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); 569d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); 570d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); 571d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 572d011e4e6SMarc Zyngier its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); 573d011e4e6SMarc Zyngier 574d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 575d011e4e6SMarc Zyngier 576d011e4e6SMarc Zyngier return desc->its_vmapti_cmd.vpe; 577d011e4e6SMarc Zyngier } 578d011e4e6SMarc Zyngier 579d011e4e6SMarc Zyngier static struct its_vpe *its_build_vmovi_cmd(struct its_cmd_block *cmd, 580d011e4e6SMarc Zyngier struct its_cmd_desc *desc) 581d011e4e6SMarc Zyngier { 582d011e4e6SMarc Zyngier u32 db; 583d011e4e6SMarc Zyngier 584d011e4e6SMarc Zyngier if (desc->its_vmovi_cmd.db_enabled) 585d011e4e6SMarc Zyngier db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; 586d011e4e6SMarc Zyngier else 587d011e4e6SMarc Zyngier db = 1023; 588d011e4e6SMarc Zyngier 589d011e4e6SMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVI); 590d011e4e6SMarc Zyngier its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); 591d011e4e6SMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); 592d011e4e6SMarc Zyngier its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); 593d011e4e6SMarc Zyngier its_encode_db_phys_id(cmd, db); 594d011e4e6SMarc Zyngier its_encode_db_valid(cmd, true); 595d011e4e6SMarc Zyngier 596d011e4e6SMarc Zyngier its_fixup_cmd(cmd); 597d011e4e6SMarc Zyngier 598d011e4e6SMarc Zyngier return desc->its_vmovi_cmd.vpe; 599d011e4e6SMarc Zyngier } 600d011e4e6SMarc Zyngier 6013171a47aSMarc Zyngier static struct its_vpe *its_build_vmovp_cmd(struct its_cmd_block *cmd, 6023171a47aSMarc Zyngier struct its_cmd_desc *desc) 6033171a47aSMarc Zyngier { 6043171a47aSMarc Zyngier its_encode_cmd(cmd, GITS_CMD_VMOVP); 6053171a47aSMarc Zyngier its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); 6063171a47aSMarc Zyngier its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); 6073171a47aSMarc Zyngier its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); 6083171a47aSMarc Zyngier its_encode_target(cmd, desc->its_vmovp_cmd.col->target_address); 6093171a47aSMarc Zyngier 6103171a47aSMarc Zyngier its_fixup_cmd(cmd); 6113171a47aSMarc Zyngier 6123171a47aSMarc Zyngier return desc->its_vmovp_cmd.vpe; 6133171a47aSMarc Zyngier } 6143171a47aSMarc Zyngier 615cc2d3216SMarc Zyngier static u64 its_cmd_ptr_to_offset(struct its_node *its, 616cc2d3216SMarc Zyngier struct its_cmd_block *ptr) 617cc2d3216SMarc Zyngier { 618cc2d3216SMarc Zyngier return (ptr - its->cmd_base) * sizeof(*ptr); 619cc2d3216SMarc Zyngier } 620cc2d3216SMarc Zyngier 621cc2d3216SMarc Zyngier static int its_queue_full(struct its_node *its) 622cc2d3216SMarc Zyngier { 623cc2d3216SMarc Zyngier int widx; 624cc2d3216SMarc Zyngier int ridx; 625cc2d3216SMarc Zyngier 626cc2d3216SMarc Zyngier widx = its->cmd_write - its->cmd_base; 627cc2d3216SMarc Zyngier ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); 628cc2d3216SMarc Zyngier 629cc2d3216SMarc Zyngier /* This is incredibly unlikely to happen, unless the ITS locks up. */ 630cc2d3216SMarc Zyngier if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) 631cc2d3216SMarc Zyngier return 1; 632cc2d3216SMarc Zyngier 633cc2d3216SMarc Zyngier return 0; 634cc2d3216SMarc Zyngier } 635cc2d3216SMarc Zyngier 636cc2d3216SMarc Zyngier static struct its_cmd_block *its_allocate_entry(struct its_node *its) 637cc2d3216SMarc Zyngier { 638cc2d3216SMarc Zyngier struct its_cmd_block *cmd; 639cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 640cc2d3216SMarc Zyngier 641cc2d3216SMarc Zyngier while (its_queue_full(its)) { 642cc2d3216SMarc Zyngier count--; 643cc2d3216SMarc Zyngier if (!count) { 644cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue not draining\n"); 645cc2d3216SMarc Zyngier return NULL; 646cc2d3216SMarc Zyngier } 647cc2d3216SMarc Zyngier cpu_relax(); 648cc2d3216SMarc Zyngier udelay(1); 649cc2d3216SMarc Zyngier } 650cc2d3216SMarc Zyngier 651cc2d3216SMarc Zyngier cmd = its->cmd_write++; 652cc2d3216SMarc Zyngier 653cc2d3216SMarc Zyngier /* Handle queue wrapping */ 654cc2d3216SMarc Zyngier if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) 655cc2d3216SMarc Zyngier its->cmd_write = its->cmd_base; 656cc2d3216SMarc Zyngier 65734d677a9SMarc Zyngier /* Clear command */ 65834d677a9SMarc Zyngier cmd->raw_cmd[0] = 0; 65934d677a9SMarc Zyngier cmd->raw_cmd[1] = 0; 66034d677a9SMarc Zyngier cmd->raw_cmd[2] = 0; 66134d677a9SMarc Zyngier cmd->raw_cmd[3] = 0; 66234d677a9SMarc Zyngier 663cc2d3216SMarc Zyngier return cmd; 664cc2d3216SMarc Zyngier } 665cc2d3216SMarc Zyngier 666cc2d3216SMarc Zyngier static struct its_cmd_block *its_post_commands(struct its_node *its) 667cc2d3216SMarc Zyngier { 668cc2d3216SMarc Zyngier u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); 669cc2d3216SMarc Zyngier 670cc2d3216SMarc Zyngier writel_relaxed(wr, its->base + GITS_CWRITER); 671cc2d3216SMarc Zyngier 672cc2d3216SMarc Zyngier return its->cmd_write; 673cc2d3216SMarc Zyngier } 674cc2d3216SMarc Zyngier 675cc2d3216SMarc Zyngier static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) 676cc2d3216SMarc Zyngier { 677cc2d3216SMarc Zyngier /* 678cc2d3216SMarc Zyngier * Make sure the commands written to memory are observable by 679cc2d3216SMarc Zyngier * the ITS. 680cc2d3216SMarc Zyngier */ 681cc2d3216SMarc Zyngier if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) 682328191c0SVladimir Murzin gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); 683cc2d3216SMarc Zyngier else 684cc2d3216SMarc Zyngier dsb(ishst); 685cc2d3216SMarc Zyngier } 686cc2d3216SMarc Zyngier 687cc2d3216SMarc Zyngier static void its_wait_for_range_completion(struct its_node *its, 688cc2d3216SMarc Zyngier struct its_cmd_block *from, 689cc2d3216SMarc Zyngier struct its_cmd_block *to) 690cc2d3216SMarc Zyngier { 691cc2d3216SMarc Zyngier u64 rd_idx, from_idx, to_idx; 692cc2d3216SMarc Zyngier u32 count = 1000000; /* 1s! */ 693cc2d3216SMarc Zyngier 694cc2d3216SMarc Zyngier from_idx = its_cmd_ptr_to_offset(its, from); 695cc2d3216SMarc Zyngier to_idx = its_cmd_ptr_to_offset(its, to); 696cc2d3216SMarc Zyngier 697cc2d3216SMarc Zyngier while (1) { 698cc2d3216SMarc Zyngier rd_idx = readl_relaxed(its->base + GITS_CREADR); 6999bdd8b1cSMarc Zyngier 7009bdd8b1cSMarc Zyngier /* Direct case */ 7019bdd8b1cSMarc Zyngier if (from_idx < to_idx && rd_idx >= to_idx) 7029bdd8b1cSMarc Zyngier break; 7039bdd8b1cSMarc Zyngier 7049bdd8b1cSMarc Zyngier /* Wrapped case */ 7059bdd8b1cSMarc Zyngier if (from_idx >= to_idx && rd_idx >= to_idx && rd_idx < from_idx) 706cc2d3216SMarc Zyngier break; 707cc2d3216SMarc Zyngier 708cc2d3216SMarc Zyngier count--; 709cc2d3216SMarc Zyngier if (!count) { 710cc2d3216SMarc Zyngier pr_err_ratelimited("ITS queue timeout\n"); 711cc2d3216SMarc Zyngier return; 712cc2d3216SMarc Zyngier } 713cc2d3216SMarc Zyngier cpu_relax(); 714cc2d3216SMarc Zyngier udelay(1); 715cc2d3216SMarc Zyngier } 716cc2d3216SMarc Zyngier } 717cc2d3216SMarc Zyngier 718e4f9094bSMarc Zyngier /* Warning, macro hell follows */ 719e4f9094bSMarc Zyngier #define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ 720e4f9094bSMarc Zyngier void name(struct its_node *its, \ 721e4f9094bSMarc Zyngier buildtype builder, \ 722e4f9094bSMarc Zyngier struct its_cmd_desc *desc) \ 723e4f9094bSMarc Zyngier { \ 724e4f9094bSMarc Zyngier struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ 725e4f9094bSMarc Zyngier synctype *sync_obj; \ 726e4f9094bSMarc Zyngier unsigned long flags; \ 727e4f9094bSMarc Zyngier \ 728e4f9094bSMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); \ 729e4f9094bSMarc Zyngier \ 730e4f9094bSMarc Zyngier cmd = its_allocate_entry(its); \ 731e4f9094bSMarc Zyngier if (!cmd) { /* We're soooooo screewed... */ \ 732e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 733e4f9094bSMarc Zyngier return; \ 734e4f9094bSMarc Zyngier } \ 735e4f9094bSMarc Zyngier sync_obj = builder(cmd, desc); \ 736e4f9094bSMarc Zyngier its_flush_cmd(its, cmd); \ 737e4f9094bSMarc Zyngier \ 738e4f9094bSMarc Zyngier if (sync_obj) { \ 739e4f9094bSMarc Zyngier sync_cmd = its_allocate_entry(its); \ 740e4f9094bSMarc Zyngier if (!sync_cmd) \ 741e4f9094bSMarc Zyngier goto post; \ 742e4f9094bSMarc Zyngier \ 743e4f9094bSMarc Zyngier buildfn(sync_cmd, sync_obj); \ 744e4f9094bSMarc Zyngier its_flush_cmd(its, sync_cmd); \ 745e4f9094bSMarc Zyngier } \ 746e4f9094bSMarc Zyngier \ 747e4f9094bSMarc Zyngier post: \ 748e4f9094bSMarc Zyngier next_cmd = its_post_commands(its); \ 749e4f9094bSMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); \ 750e4f9094bSMarc Zyngier \ 751e4f9094bSMarc Zyngier its_wait_for_range_completion(its, cmd, next_cmd); \ 752e4f9094bSMarc Zyngier } 753e4f9094bSMarc Zyngier 754e4f9094bSMarc Zyngier static void its_build_sync_cmd(struct its_cmd_block *sync_cmd, 755e4f9094bSMarc Zyngier struct its_collection *sync_col) 756cc2d3216SMarc Zyngier { 757cc2d3216SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_SYNC); 758cc2d3216SMarc Zyngier its_encode_target(sync_cmd, sync_col->target_address); 759e4f9094bSMarc Zyngier 760cc2d3216SMarc Zyngier its_fixup_cmd(sync_cmd); 761cc2d3216SMarc Zyngier } 762cc2d3216SMarc Zyngier 763e4f9094bSMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, 764e4f9094bSMarc Zyngier struct its_collection, its_build_sync_cmd) 765cc2d3216SMarc Zyngier 766d011e4e6SMarc Zyngier static void its_build_vsync_cmd(struct its_cmd_block *sync_cmd, 767d011e4e6SMarc Zyngier struct its_vpe *sync_vpe) 768d011e4e6SMarc Zyngier { 769d011e4e6SMarc Zyngier its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); 770d011e4e6SMarc Zyngier its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); 771d011e4e6SMarc Zyngier 772d011e4e6SMarc Zyngier its_fixup_cmd(sync_cmd); 773d011e4e6SMarc Zyngier } 774d011e4e6SMarc Zyngier 775d011e4e6SMarc Zyngier static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, 776d011e4e6SMarc Zyngier struct its_vpe, its_build_vsync_cmd) 777d011e4e6SMarc Zyngier 7788d85dcedSMarc Zyngier static void its_send_int(struct its_device *dev, u32 event_id) 7798d85dcedSMarc Zyngier { 7808d85dcedSMarc Zyngier struct its_cmd_desc desc; 7818d85dcedSMarc Zyngier 7828d85dcedSMarc Zyngier desc.its_int_cmd.dev = dev; 7838d85dcedSMarc Zyngier desc.its_int_cmd.event_id = event_id; 7848d85dcedSMarc Zyngier 7858d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_int_cmd, &desc); 7868d85dcedSMarc Zyngier } 7878d85dcedSMarc Zyngier 7888d85dcedSMarc Zyngier static void its_send_clear(struct its_device *dev, u32 event_id) 7898d85dcedSMarc Zyngier { 7908d85dcedSMarc Zyngier struct its_cmd_desc desc; 7918d85dcedSMarc Zyngier 7928d85dcedSMarc Zyngier desc.its_clear_cmd.dev = dev; 7938d85dcedSMarc Zyngier desc.its_clear_cmd.event_id = event_id; 7948d85dcedSMarc Zyngier 7958d85dcedSMarc Zyngier its_send_single_command(dev->its, its_build_clear_cmd, &desc); 7968d85dcedSMarc Zyngier } 7978d85dcedSMarc Zyngier 798cc2d3216SMarc Zyngier static void its_send_inv(struct its_device *dev, u32 event_id) 799cc2d3216SMarc Zyngier { 800cc2d3216SMarc Zyngier struct its_cmd_desc desc; 801cc2d3216SMarc Zyngier 802cc2d3216SMarc Zyngier desc.its_inv_cmd.dev = dev; 803cc2d3216SMarc Zyngier desc.its_inv_cmd.event_id = event_id; 804cc2d3216SMarc Zyngier 805cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_inv_cmd, &desc); 806cc2d3216SMarc Zyngier } 807cc2d3216SMarc Zyngier 808cc2d3216SMarc Zyngier static void its_send_mapd(struct its_device *dev, int valid) 809cc2d3216SMarc Zyngier { 810cc2d3216SMarc Zyngier struct its_cmd_desc desc; 811cc2d3216SMarc Zyngier 812cc2d3216SMarc Zyngier desc.its_mapd_cmd.dev = dev; 813cc2d3216SMarc Zyngier desc.its_mapd_cmd.valid = !!valid; 814cc2d3216SMarc Zyngier 815cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_mapd_cmd, &desc); 816cc2d3216SMarc Zyngier } 817cc2d3216SMarc Zyngier 818cc2d3216SMarc Zyngier static void its_send_mapc(struct its_node *its, struct its_collection *col, 819cc2d3216SMarc Zyngier int valid) 820cc2d3216SMarc Zyngier { 821cc2d3216SMarc Zyngier struct its_cmd_desc desc; 822cc2d3216SMarc Zyngier 823cc2d3216SMarc Zyngier desc.its_mapc_cmd.col = col; 824cc2d3216SMarc Zyngier desc.its_mapc_cmd.valid = !!valid; 825cc2d3216SMarc Zyngier 826cc2d3216SMarc Zyngier its_send_single_command(its, its_build_mapc_cmd, &desc); 827cc2d3216SMarc Zyngier } 828cc2d3216SMarc Zyngier 8296a25ad3aSMarc Zyngier static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) 830cc2d3216SMarc Zyngier { 831cc2d3216SMarc Zyngier struct its_cmd_desc desc; 832cc2d3216SMarc Zyngier 8336a25ad3aSMarc Zyngier desc.its_mapti_cmd.dev = dev; 8346a25ad3aSMarc Zyngier desc.its_mapti_cmd.phys_id = irq_id; 8356a25ad3aSMarc Zyngier desc.its_mapti_cmd.event_id = id; 836cc2d3216SMarc Zyngier 8376a25ad3aSMarc Zyngier its_send_single_command(dev->its, its_build_mapti_cmd, &desc); 838cc2d3216SMarc Zyngier } 839cc2d3216SMarc Zyngier 840cc2d3216SMarc Zyngier static void its_send_movi(struct its_device *dev, 841cc2d3216SMarc Zyngier struct its_collection *col, u32 id) 842cc2d3216SMarc Zyngier { 843cc2d3216SMarc Zyngier struct its_cmd_desc desc; 844cc2d3216SMarc Zyngier 845cc2d3216SMarc Zyngier desc.its_movi_cmd.dev = dev; 846cc2d3216SMarc Zyngier desc.its_movi_cmd.col = col; 847591e5becSMarc Zyngier desc.its_movi_cmd.event_id = id; 848cc2d3216SMarc Zyngier 849cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_movi_cmd, &desc); 850cc2d3216SMarc Zyngier } 851cc2d3216SMarc Zyngier 852cc2d3216SMarc Zyngier static void its_send_discard(struct its_device *dev, u32 id) 853cc2d3216SMarc Zyngier { 854cc2d3216SMarc Zyngier struct its_cmd_desc desc; 855cc2d3216SMarc Zyngier 856cc2d3216SMarc Zyngier desc.its_discard_cmd.dev = dev; 857cc2d3216SMarc Zyngier desc.its_discard_cmd.event_id = id; 858cc2d3216SMarc Zyngier 859cc2d3216SMarc Zyngier its_send_single_command(dev->its, its_build_discard_cmd, &desc); 860cc2d3216SMarc Zyngier } 861cc2d3216SMarc Zyngier 862cc2d3216SMarc Zyngier static void its_send_invall(struct its_node *its, struct its_collection *col) 863cc2d3216SMarc Zyngier { 864cc2d3216SMarc Zyngier struct its_cmd_desc desc; 865cc2d3216SMarc Zyngier 866cc2d3216SMarc Zyngier desc.its_invall_cmd.col = col; 867cc2d3216SMarc Zyngier 868cc2d3216SMarc Zyngier its_send_single_command(its, its_build_invall_cmd, &desc); 869cc2d3216SMarc Zyngier } 870c48ed51cSMarc Zyngier 871d011e4e6SMarc Zyngier static void its_send_vmapti(struct its_device *dev, u32 id) 872d011e4e6SMarc Zyngier { 873d011e4e6SMarc Zyngier struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; 874d011e4e6SMarc Zyngier struct its_cmd_desc desc; 875d011e4e6SMarc Zyngier 876d011e4e6SMarc Zyngier desc.its_vmapti_cmd.vpe = map->vpe; 877d011e4e6SMarc Zyngier desc.its_vmapti_cmd.dev = dev; 878d011e4e6SMarc Zyngier desc.its_vmapti_cmd.virt_id = map->vintid; 879d011e4e6SMarc Zyngier desc.its_vmapti_cmd.event_id = id; 880d011e4e6SMarc Zyngier desc.its_vmapti_cmd.db_enabled = map->db_enabled; 881d011e4e6SMarc Zyngier 882d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); 883d011e4e6SMarc Zyngier } 884d011e4e6SMarc Zyngier 885d011e4e6SMarc Zyngier static void its_send_vmovi(struct its_device *dev, u32 id) 886d011e4e6SMarc Zyngier { 887d011e4e6SMarc Zyngier struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; 888d011e4e6SMarc Zyngier struct its_cmd_desc desc; 889d011e4e6SMarc Zyngier 890d011e4e6SMarc Zyngier desc.its_vmovi_cmd.vpe = map->vpe; 891d011e4e6SMarc Zyngier desc.its_vmovi_cmd.dev = dev; 892d011e4e6SMarc Zyngier desc.its_vmovi_cmd.event_id = id; 893d011e4e6SMarc Zyngier desc.its_vmovi_cmd.db_enabled = map->db_enabled; 894d011e4e6SMarc Zyngier 895d011e4e6SMarc Zyngier its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); 896d011e4e6SMarc Zyngier } 897d011e4e6SMarc Zyngier 898eb78192bSMarc Zyngier static void its_send_vmapp(struct its_vpe *vpe, bool valid) 899eb78192bSMarc Zyngier { 900eb78192bSMarc Zyngier struct its_cmd_desc desc; 901eb78192bSMarc Zyngier struct its_node *its; 902eb78192bSMarc Zyngier 903eb78192bSMarc Zyngier desc.its_vmapp_cmd.vpe = vpe; 904eb78192bSMarc Zyngier desc.its_vmapp_cmd.valid = valid; 905eb78192bSMarc Zyngier 906eb78192bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 907eb78192bSMarc Zyngier if (!its->is_v4) 908eb78192bSMarc Zyngier continue; 909eb78192bSMarc Zyngier 910eb78192bSMarc Zyngier desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; 911eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); 912eb78192bSMarc Zyngier } 913eb78192bSMarc Zyngier } 914eb78192bSMarc Zyngier 9153171a47aSMarc Zyngier static void its_send_vmovp(struct its_vpe *vpe) 9163171a47aSMarc Zyngier { 9173171a47aSMarc Zyngier struct its_cmd_desc desc; 9183171a47aSMarc Zyngier struct its_node *its; 9193171a47aSMarc Zyngier unsigned long flags; 9203171a47aSMarc Zyngier int col_id = vpe->col_idx; 9213171a47aSMarc Zyngier 9223171a47aSMarc Zyngier desc.its_vmovp_cmd.vpe = vpe; 9233171a47aSMarc Zyngier desc.its_vmovp_cmd.its_list = (u16)its_list_map; 9243171a47aSMarc Zyngier 9253171a47aSMarc Zyngier if (!its_list_map) { 9263171a47aSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 9273171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = 0; 9283171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 9293171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 9303171a47aSMarc Zyngier return; 9313171a47aSMarc Zyngier } 9323171a47aSMarc Zyngier 9333171a47aSMarc Zyngier /* 9343171a47aSMarc Zyngier * Yet another marvel of the architecture. If using the 9353171a47aSMarc Zyngier * its_list "feature", we need to make sure that all ITSs 9363171a47aSMarc Zyngier * receive all VMOVP commands in the same order. The only way 9373171a47aSMarc Zyngier * to guarantee this is to make vmovp a serialization point. 9383171a47aSMarc Zyngier * 9393171a47aSMarc Zyngier * Wall <-- Head. 9403171a47aSMarc Zyngier */ 9413171a47aSMarc Zyngier raw_spin_lock_irqsave(&vmovp_lock, flags); 9423171a47aSMarc Zyngier 9433171a47aSMarc Zyngier desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; 9443171a47aSMarc Zyngier 9453171a47aSMarc Zyngier /* Emit VMOVPs */ 9463171a47aSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 9473171a47aSMarc Zyngier if (!its->is_v4) 9483171a47aSMarc Zyngier continue; 9493171a47aSMarc Zyngier 9503171a47aSMarc Zyngier desc.its_vmovp_cmd.col = &its->collections[col_id]; 9513171a47aSMarc Zyngier its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); 9523171a47aSMarc Zyngier } 9533171a47aSMarc Zyngier 9543171a47aSMarc Zyngier raw_spin_unlock_irqrestore(&vmovp_lock, flags); 9553171a47aSMarc Zyngier } 9563171a47aSMarc Zyngier 957eb78192bSMarc Zyngier static void its_send_vinvall(struct its_vpe *vpe) 958eb78192bSMarc Zyngier { 959eb78192bSMarc Zyngier struct its_cmd_desc desc; 960eb78192bSMarc Zyngier struct its_node *its; 961eb78192bSMarc Zyngier 962eb78192bSMarc Zyngier desc.its_vinvall_cmd.vpe = vpe; 963eb78192bSMarc Zyngier 964eb78192bSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 965eb78192bSMarc Zyngier if (!its->is_v4) 966eb78192bSMarc Zyngier continue; 967eb78192bSMarc Zyngier its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); 968eb78192bSMarc Zyngier } 969eb78192bSMarc Zyngier } 970eb78192bSMarc Zyngier 971c48ed51cSMarc Zyngier /* 972c48ed51cSMarc Zyngier * irqchip functions - assumes MSI, mostly. 973c48ed51cSMarc Zyngier */ 974c48ed51cSMarc Zyngier 975c48ed51cSMarc Zyngier static inline u32 its_get_event_id(struct irq_data *d) 976c48ed51cSMarc Zyngier { 977c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 978591e5becSMarc Zyngier return d->hwirq - its_dev->event_map.lpi_base; 979c48ed51cSMarc Zyngier } 980c48ed51cSMarc Zyngier 981015ec038SMarc Zyngier static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) 982c48ed51cSMarc Zyngier { 983015ec038SMarc Zyngier irq_hw_number_t hwirq; 984adcdb94eSMarc Zyngier struct page *prop_page; 985adcdb94eSMarc Zyngier u8 *cfg; 986c48ed51cSMarc Zyngier 987015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 988015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 989015ec038SMarc Zyngier u32 event = its_get_event_id(d); 990015ec038SMarc Zyngier 991015ec038SMarc Zyngier prop_page = its_dev->event_map.vm->vprop_page; 992015ec038SMarc Zyngier hwirq = its_dev->event_map.vlpi_maps[event].vintid; 993015ec038SMarc Zyngier } else { 994adcdb94eSMarc Zyngier prop_page = gic_rdists->prop_page; 995015ec038SMarc Zyngier hwirq = d->hwirq; 996015ec038SMarc Zyngier } 997adcdb94eSMarc Zyngier 998adcdb94eSMarc Zyngier cfg = page_address(prop_page) + hwirq - 8192; 999adcdb94eSMarc Zyngier *cfg &= ~clr; 1000015ec038SMarc Zyngier *cfg |= set | LPI_PROP_GROUP1; 1001c48ed51cSMarc Zyngier 1002c48ed51cSMarc Zyngier /* 1003c48ed51cSMarc Zyngier * Make the above write visible to the redistributors. 1004c48ed51cSMarc Zyngier * And yes, we're flushing exactly: One. Single. Byte. 1005c48ed51cSMarc Zyngier * Humpf... 1006c48ed51cSMarc Zyngier */ 1007c48ed51cSMarc Zyngier if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) 1008328191c0SVladimir Murzin gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); 1009c48ed51cSMarc Zyngier else 1010c48ed51cSMarc Zyngier dsb(ishst); 1011015ec038SMarc Zyngier } 1012015ec038SMarc Zyngier 1013015ec038SMarc Zyngier static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) 1014015ec038SMarc Zyngier { 1015015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1016015ec038SMarc Zyngier 1017015ec038SMarc Zyngier lpi_write_config(d, clr, set); 1018adcdb94eSMarc Zyngier its_send_inv(its_dev, its_get_event_id(d)); 1019c48ed51cSMarc Zyngier } 1020c48ed51cSMarc Zyngier 1021015ec038SMarc Zyngier static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) 1022015ec038SMarc Zyngier { 1023015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1024015ec038SMarc Zyngier u32 event = its_get_event_id(d); 1025015ec038SMarc Zyngier 1026015ec038SMarc Zyngier if (its_dev->event_map.vlpi_maps[event].db_enabled == enable) 1027015ec038SMarc Zyngier return; 1028015ec038SMarc Zyngier 1029015ec038SMarc Zyngier its_dev->event_map.vlpi_maps[event].db_enabled = enable; 1030015ec038SMarc Zyngier 1031015ec038SMarc Zyngier /* 1032015ec038SMarc Zyngier * More fun with the architecture: 1033015ec038SMarc Zyngier * 1034015ec038SMarc Zyngier * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI 1035015ec038SMarc Zyngier * value or to 1023, depending on the enable bit. But that 1036015ec038SMarc Zyngier * would be issueing a mapping for an /existing/ DevID+EventID 1037015ec038SMarc Zyngier * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI 1038015ec038SMarc Zyngier * to the /same/ vPE, using this opportunity to adjust the 1039015ec038SMarc Zyngier * doorbell. Mouahahahaha. We loves it, Precious. 1040015ec038SMarc Zyngier */ 1041015ec038SMarc Zyngier its_send_vmovi(its_dev, event); 1042015ec038SMarc Zyngier } 1043015ec038SMarc Zyngier 1044c48ed51cSMarc Zyngier static void its_mask_irq(struct irq_data *d) 1045c48ed51cSMarc Zyngier { 1046015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1047015ec038SMarc Zyngier its_vlpi_set_doorbell(d, false); 1048015ec038SMarc Zyngier 1049adcdb94eSMarc Zyngier lpi_update_config(d, LPI_PROP_ENABLED, 0); 1050c48ed51cSMarc Zyngier } 1051c48ed51cSMarc Zyngier 1052c48ed51cSMarc Zyngier static void its_unmask_irq(struct irq_data *d) 1053c48ed51cSMarc Zyngier { 1054015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1055015ec038SMarc Zyngier its_vlpi_set_doorbell(d, true); 1056015ec038SMarc Zyngier 1057adcdb94eSMarc Zyngier lpi_update_config(d, 0, LPI_PROP_ENABLED); 1058c48ed51cSMarc Zyngier } 1059c48ed51cSMarc Zyngier 1060c48ed51cSMarc Zyngier static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, 1061c48ed51cSMarc Zyngier bool force) 1062c48ed51cSMarc Zyngier { 1063fbf8f40eSGanapatrao Kulkarni unsigned int cpu; 1064fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 1065c48ed51cSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1066c48ed51cSMarc Zyngier struct its_collection *target_col; 1067c48ed51cSMarc Zyngier u32 id = its_get_event_id(d); 1068c48ed51cSMarc Zyngier 1069015ec038SMarc Zyngier /* A forwarded interrupt should use irq_set_vcpu_affinity */ 1070015ec038SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) 1071015ec038SMarc Zyngier return -EINVAL; 1072015ec038SMarc Zyngier 1073fbf8f40eSGanapatrao Kulkarni /* lpi cannot be routed to a redistributor that is on a foreign node */ 1074fbf8f40eSGanapatrao Kulkarni if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 1075fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) { 1076fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 1077fbf8f40eSGanapatrao Kulkarni if (!cpumask_intersects(mask_val, cpu_mask)) 1078fbf8f40eSGanapatrao Kulkarni return -EINVAL; 1079fbf8f40eSGanapatrao Kulkarni } 1080fbf8f40eSGanapatrao Kulkarni } 1081fbf8f40eSGanapatrao Kulkarni 1082fbf8f40eSGanapatrao Kulkarni cpu = cpumask_any_and(mask_val, cpu_mask); 1083fbf8f40eSGanapatrao Kulkarni 1084c48ed51cSMarc Zyngier if (cpu >= nr_cpu_ids) 1085c48ed51cSMarc Zyngier return -EINVAL; 1086c48ed51cSMarc Zyngier 10878b8d94a7SMaJun /* don't set the affinity when the target cpu is same as current one */ 10888b8d94a7SMaJun if (cpu != its_dev->event_map.col_map[id]) { 1089c48ed51cSMarc Zyngier target_col = &its_dev->its->collections[cpu]; 1090c48ed51cSMarc Zyngier its_send_movi(its_dev, target_col, id); 1091591e5becSMarc Zyngier its_dev->event_map.col_map[id] = cpu; 10928b8d94a7SMaJun } 1093c48ed51cSMarc Zyngier 1094c48ed51cSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 1095c48ed51cSMarc Zyngier } 1096c48ed51cSMarc Zyngier 1097b48ac83dSMarc Zyngier static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) 1098b48ac83dSMarc Zyngier { 1099b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1100b48ac83dSMarc Zyngier struct its_node *its; 1101b48ac83dSMarc Zyngier u64 addr; 1102b48ac83dSMarc Zyngier 1103b48ac83dSMarc Zyngier its = its_dev->its; 1104b48ac83dSMarc Zyngier addr = its->phys_base + GITS_TRANSLATER; 1105b48ac83dSMarc Zyngier 1106b11283ebSVladimir Murzin msg->address_lo = lower_32_bits(addr); 1107b11283ebSVladimir Murzin msg->address_hi = upper_32_bits(addr); 1108b48ac83dSMarc Zyngier msg->data = its_get_event_id(d); 110944bb7e24SRobin Murphy 111044bb7e24SRobin Murphy iommu_dma_map_msi_msg(d->irq, msg); 1111b48ac83dSMarc Zyngier } 1112b48ac83dSMarc Zyngier 11138d85dcedSMarc Zyngier static int its_irq_set_irqchip_state(struct irq_data *d, 11148d85dcedSMarc Zyngier enum irqchip_irq_state which, 11158d85dcedSMarc Zyngier bool state) 11168d85dcedSMarc Zyngier { 11178d85dcedSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 11188d85dcedSMarc Zyngier u32 event = its_get_event_id(d); 11198d85dcedSMarc Zyngier 11208d85dcedSMarc Zyngier if (which != IRQCHIP_STATE_PENDING) 11218d85dcedSMarc Zyngier return -EINVAL; 11228d85dcedSMarc Zyngier 11238d85dcedSMarc Zyngier if (state) 11248d85dcedSMarc Zyngier its_send_int(its_dev, event); 11258d85dcedSMarc Zyngier else 11268d85dcedSMarc Zyngier its_send_clear(its_dev, event); 11278d85dcedSMarc Zyngier 11288d85dcedSMarc Zyngier return 0; 11298d85dcedSMarc Zyngier } 11308d85dcedSMarc Zyngier 1131d011e4e6SMarc Zyngier static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) 1132d011e4e6SMarc Zyngier { 1133d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1134d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1135d011e4e6SMarc Zyngier int ret = 0; 1136d011e4e6SMarc Zyngier 1137d011e4e6SMarc Zyngier if (!info->map) 1138d011e4e6SMarc Zyngier return -EINVAL; 1139d011e4e6SMarc Zyngier 1140d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1141d011e4e6SMarc Zyngier 1142d011e4e6SMarc Zyngier if (!its_dev->event_map.vm) { 1143d011e4e6SMarc Zyngier struct its_vlpi_map *maps; 1144d011e4e6SMarc Zyngier 1145d011e4e6SMarc Zyngier maps = kzalloc(sizeof(*maps) * its_dev->event_map.nr_lpis, 1146d011e4e6SMarc Zyngier GFP_KERNEL); 1147d011e4e6SMarc Zyngier if (!maps) { 1148d011e4e6SMarc Zyngier ret = -ENOMEM; 1149d011e4e6SMarc Zyngier goto out; 1150d011e4e6SMarc Zyngier } 1151d011e4e6SMarc Zyngier 1152d011e4e6SMarc Zyngier its_dev->event_map.vm = info->map->vm; 1153d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps = maps; 1154d011e4e6SMarc Zyngier } else if (its_dev->event_map.vm != info->map->vm) { 1155d011e4e6SMarc Zyngier ret = -EINVAL; 1156d011e4e6SMarc Zyngier goto out; 1157d011e4e6SMarc Zyngier } 1158d011e4e6SMarc Zyngier 1159d011e4e6SMarc Zyngier /* Get our private copy of the mapping information */ 1160d011e4e6SMarc Zyngier its_dev->event_map.vlpi_maps[event] = *info->map; 1161d011e4e6SMarc Zyngier 1162d011e4e6SMarc Zyngier if (irqd_is_forwarded_to_vcpu(d)) { 1163d011e4e6SMarc Zyngier /* Already mapped, move it around */ 1164d011e4e6SMarc Zyngier its_send_vmovi(its_dev, event); 1165d011e4e6SMarc Zyngier } else { 1166d011e4e6SMarc Zyngier /* Drop the physical mapping */ 1167d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1168d011e4e6SMarc Zyngier 1169d011e4e6SMarc Zyngier /* and install the virtual one */ 1170d011e4e6SMarc Zyngier its_send_vmapti(its_dev, event); 1171d011e4e6SMarc Zyngier irqd_set_forwarded_to_vcpu(d); 1172d011e4e6SMarc Zyngier 1173d011e4e6SMarc Zyngier /* Increment the number of VLPIs */ 1174d011e4e6SMarc Zyngier its_dev->event_map.nr_vlpis++; 1175d011e4e6SMarc Zyngier } 1176d011e4e6SMarc Zyngier 1177d011e4e6SMarc Zyngier out: 1178d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1179d011e4e6SMarc Zyngier return ret; 1180d011e4e6SMarc Zyngier } 1181d011e4e6SMarc Zyngier 1182d011e4e6SMarc Zyngier static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) 1183d011e4e6SMarc Zyngier { 1184d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1185d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1186d011e4e6SMarc Zyngier int ret = 0; 1187d011e4e6SMarc Zyngier 1188d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1189d011e4e6SMarc Zyngier 1190d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || 1191d011e4e6SMarc Zyngier !its_dev->event_map.vlpi_maps[event].vm) { 1192d011e4e6SMarc Zyngier ret = -EINVAL; 1193d011e4e6SMarc Zyngier goto out; 1194d011e4e6SMarc Zyngier } 1195d011e4e6SMarc Zyngier 1196d011e4e6SMarc Zyngier /* Copy our mapping information to the incoming request */ 1197d011e4e6SMarc Zyngier *info->map = its_dev->event_map.vlpi_maps[event]; 1198d011e4e6SMarc Zyngier 1199d011e4e6SMarc Zyngier out: 1200d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1201d011e4e6SMarc Zyngier return ret; 1202d011e4e6SMarc Zyngier } 1203d011e4e6SMarc Zyngier 1204d011e4e6SMarc Zyngier static int its_vlpi_unmap(struct irq_data *d) 1205d011e4e6SMarc Zyngier { 1206d011e4e6SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1207d011e4e6SMarc Zyngier u32 event = its_get_event_id(d); 1208d011e4e6SMarc Zyngier int ret = 0; 1209d011e4e6SMarc Zyngier 1210d011e4e6SMarc Zyngier mutex_lock(&its_dev->event_map.vlpi_lock); 1211d011e4e6SMarc Zyngier 1212d011e4e6SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { 1213d011e4e6SMarc Zyngier ret = -EINVAL; 1214d011e4e6SMarc Zyngier goto out; 1215d011e4e6SMarc Zyngier } 1216d011e4e6SMarc Zyngier 1217d011e4e6SMarc Zyngier /* Drop the virtual mapping */ 1218d011e4e6SMarc Zyngier its_send_discard(its_dev, event); 1219d011e4e6SMarc Zyngier 1220d011e4e6SMarc Zyngier /* and restore the physical one */ 1221d011e4e6SMarc Zyngier irqd_clr_forwarded_to_vcpu(d); 1222d011e4e6SMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 1223d011e4e6SMarc Zyngier lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | 1224d011e4e6SMarc Zyngier LPI_PROP_ENABLED | 1225d011e4e6SMarc Zyngier LPI_PROP_GROUP1)); 1226d011e4e6SMarc Zyngier 1227d011e4e6SMarc Zyngier /* 1228d011e4e6SMarc Zyngier * Drop the refcount and make the device available again if 1229d011e4e6SMarc Zyngier * this was the last VLPI. 1230d011e4e6SMarc Zyngier */ 1231d011e4e6SMarc Zyngier if (!--its_dev->event_map.nr_vlpis) { 1232d011e4e6SMarc Zyngier its_dev->event_map.vm = NULL; 1233d011e4e6SMarc Zyngier kfree(its_dev->event_map.vlpi_maps); 1234d011e4e6SMarc Zyngier } 1235d011e4e6SMarc Zyngier 1236d011e4e6SMarc Zyngier out: 1237d011e4e6SMarc Zyngier mutex_unlock(&its_dev->event_map.vlpi_lock); 1238d011e4e6SMarc Zyngier return ret; 1239d011e4e6SMarc Zyngier } 1240d011e4e6SMarc Zyngier 1241015ec038SMarc Zyngier static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) 1242015ec038SMarc Zyngier { 1243015ec038SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1244015ec038SMarc Zyngier 1245015ec038SMarc Zyngier if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) 1246015ec038SMarc Zyngier return -EINVAL; 1247015ec038SMarc Zyngier 1248015ec038SMarc Zyngier if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) 1249015ec038SMarc Zyngier lpi_update_config(d, 0xff, info->config); 1250015ec038SMarc Zyngier else 1251015ec038SMarc Zyngier lpi_write_config(d, 0xff, info->config); 1252015ec038SMarc Zyngier its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); 1253015ec038SMarc Zyngier 1254015ec038SMarc Zyngier return 0; 1255015ec038SMarc Zyngier } 1256015ec038SMarc Zyngier 1257c808eea8SMarc Zyngier static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 1258c808eea8SMarc Zyngier { 1259c808eea8SMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 1260c808eea8SMarc Zyngier struct its_cmd_info *info = vcpu_info; 1261c808eea8SMarc Zyngier 1262c808eea8SMarc Zyngier /* Need a v4 ITS */ 1263d011e4e6SMarc Zyngier if (!its_dev->its->is_v4) 1264c808eea8SMarc Zyngier return -EINVAL; 1265c808eea8SMarc Zyngier 1266d011e4e6SMarc Zyngier /* Unmap request? */ 1267d011e4e6SMarc Zyngier if (!info) 1268d011e4e6SMarc Zyngier return its_vlpi_unmap(d); 1269d011e4e6SMarc Zyngier 1270c808eea8SMarc Zyngier switch (info->cmd_type) { 1271c808eea8SMarc Zyngier case MAP_VLPI: 1272d011e4e6SMarc Zyngier return its_vlpi_map(d, info); 1273c808eea8SMarc Zyngier 1274c808eea8SMarc Zyngier case GET_VLPI: 1275d011e4e6SMarc Zyngier return its_vlpi_get(d, info); 1276c808eea8SMarc Zyngier 1277c808eea8SMarc Zyngier case PROP_UPDATE_VLPI: 1278c808eea8SMarc Zyngier case PROP_UPDATE_AND_INV_VLPI: 1279015ec038SMarc Zyngier return its_vlpi_prop_update(d, info); 1280c808eea8SMarc Zyngier 1281c808eea8SMarc Zyngier default: 1282c808eea8SMarc Zyngier return -EINVAL; 1283c808eea8SMarc Zyngier } 1284c808eea8SMarc Zyngier } 1285c808eea8SMarc Zyngier 1286c48ed51cSMarc Zyngier static struct irq_chip its_irq_chip = { 1287c48ed51cSMarc Zyngier .name = "ITS", 1288c48ed51cSMarc Zyngier .irq_mask = its_mask_irq, 1289c48ed51cSMarc Zyngier .irq_unmask = its_unmask_irq, 1290004fa08dSAshok Kumar .irq_eoi = irq_chip_eoi_parent, 1291c48ed51cSMarc Zyngier .irq_set_affinity = its_set_affinity, 1292b48ac83dSMarc Zyngier .irq_compose_msi_msg = its_irq_compose_msi_msg, 12938d85dcedSMarc Zyngier .irq_set_irqchip_state = its_irq_set_irqchip_state, 1294c808eea8SMarc Zyngier .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, 1295b48ac83dSMarc Zyngier }; 1296b48ac83dSMarc Zyngier 1297bf9529f8SMarc Zyngier /* 1298bf9529f8SMarc Zyngier * How we allocate LPIs: 1299bf9529f8SMarc Zyngier * 1300bf9529f8SMarc Zyngier * The GIC has id_bits bits for interrupt identifiers. From there, we 1301bf9529f8SMarc Zyngier * must subtract 8192 which are reserved for SGIs/PPIs/SPIs. Then, as 1302bf9529f8SMarc Zyngier * we allocate LPIs by chunks of 32, we can shift the whole thing by 5 1303bf9529f8SMarc Zyngier * bits to the right. 1304bf9529f8SMarc Zyngier * 1305bf9529f8SMarc Zyngier * This gives us (((1UL << id_bits) - 8192) >> 5) possible allocations. 1306bf9529f8SMarc Zyngier */ 1307bf9529f8SMarc Zyngier #define IRQS_PER_CHUNK_SHIFT 5 1308bf9529f8SMarc Zyngier #define IRQS_PER_CHUNK (1 << IRQS_PER_CHUNK_SHIFT) 13096c31e123SShanker Donthineni #define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ 1310bf9529f8SMarc Zyngier 1311bf9529f8SMarc Zyngier static unsigned long *lpi_bitmap; 1312bf9529f8SMarc Zyngier static u32 lpi_chunks; 1313bf9529f8SMarc Zyngier static DEFINE_SPINLOCK(lpi_lock); 1314bf9529f8SMarc Zyngier 1315bf9529f8SMarc Zyngier static int its_lpi_to_chunk(int lpi) 1316bf9529f8SMarc Zyngier { 1317bf9529f8SMarc Zyngier return (lpi - 8192) >> IRQS_PER_CHUNK_SHIFT; 1318bf9529f8SMarc Zyngier } 1319bf9529f8SMarc Zyngier 1320bf9529f8SMarc Zyngier static int its_chunk_to_lpi(int chunk) 1321bf9529f8SMarc Zyngier { 1322bf9529f8SMarc Zyngier return (chunk << IRQS_PER_CHUNK_SHIFT) + 8192; 1323bf9529f8SMarc Zyngier } 1324bf9529f8SMarc Zyngier 132504a0e4deSTomasz Nowicki static int __init its_lpi_init(u32 id_bits) 1326bf9529f8SMarc Zyngier { 1327bf9529f8SMarc Zyngier lpi_chunks = its_lpi_to_chunk(1UL << id_bits); 1328bf9529f8SMarc Zyngier 1329bf9529f8SMarc Zyngier lpi_bitmap = kzalloc(BITS_TO_LONGS(lpi_chunks) * sizeof(long), 1330bf9529f8SMarc Zyngier GFP_KERNEL); 1331bf9529f8SMarc Zyngier if (!lpi_bitmap) { 1332bf9529f8SMarc Zyngier lpi_chunks = 0; 1333bf9529f8SMarc Zyngier return -ENOMEM; 1334bf9529f8SMarc Zyngier } 1335bf9529f8SMarc Zyngier 1336bf9529f8SMarc Zyngier pr_info("ITS: Allocated %d chunks for LPIs\n", (int)lpi_chunks); 1337bf9529f8SMarc Zyngier return 0; 1338bf9529f8SMarc Zyngier } 1339bf9529f8SMarc Zyngier 1340bf9529f8SMarc Zyngier static unsigned long *its_lpi_alloc_chunks(int nr_irqs, int *base, int *nr_ids) 1341bf9529f8SMarc Zyngier { 1342bf9529f8SMarc Zyngier unsigned long *bitmap = NULL; 1343bf9529f8SMarc Zyngier int chunk_id; 1344bf9529f8SMarc Zyngier int nr_chunks; 1345bf9529f8SMarc Zyngier int i; 1346bf9529f8SMarc Zyngier 1347bf9529f8SMarc Zyngier nr_chunks = DIV_ROUND_UP(nr_irqs, IRQS_PER_CHUNK); 1348bf9529f8SMarc Zyngier 1349bf9529f8SMarc Zyngier spin_lock(&lpi_lock); 1350bf9529f8SMarc Zyngier 1351bf9529f8SMarc Zyngier do { 1352bf9529f8SMarc Zyngier chunk_id = bitmap_find_next_zero_area(lpi_bitmap, lpi_chunks, 1353bf9529f8SMarc Zyngier 0, nr_chunks, 0); 1354bf9529f8SMarc Zyngier if (chunk_id < lpi_chunks) 1355bf9529f8SMarc Zyngier break; 1356bf9529f8SMarc Zyngier 1357bf9529f8SMarc Zyngier nr_chunks--; 1358bf9529f8SMarc Zyngier } while (nr_chunks > 0); 1359bf9529f8SMarc Zyngier 1360bf9529f8SMarc Zyngier if (!nr_chunks) 1361bf9529f8SMarc Zyngier goto out; 1362bf9529f8SMarc Zyngier 1363bf9529f8SMarc Zyngier bitmap = kzalloc(BITS_TO_LONGS(nr_chunks * IRQS_PER_CHUNK) * sizeof (long), 1364bf9529f8SMarc Zyngier GFP_ATOMIC); 1365bf9529f8SMarc Zyngier if (!bitmap) 1366bf9529f8SMarc Zyngier goto out; 1367bf9529f8SMarc Zyngier 1368bf9529f8SMarc Zyngier for (i = 0; i < nr_chunks; i++) 1369bf9529f8SMarc Zyngier set_bit(chunk_id + i, lpi_bitmap); 1370bf9529f8SMarc Zyngier 1371bf9529f8SMarc Zyngier *base = its_chunk_to_lpi(chunk_id); 1372bf9529f8SMarc Zyngier *nr_ids = nr_chunks * IRQS_PER_CHUNK; 1373bf9529f8SMarc Zyngier 1374bf9529f8SMarc Zyngier out: 1375bf9529f8SMarc Zyngier spin_unlock(&lpi_lock); 1376bf9529f8SMarc Zyngier 1377c8415b94SMarc Zyngier if (!bitmap) 1378c8415b94SMarc Zyngier *base = *nr_ids = 0; 1379c8415b94SMarc Zyngier 1380bf9529f8SMarc Zyngier return bitmap; 1381bf9529f8SMarc Zyngier } 1382bf9529f8SMarc Zyngier 1383cf2be8baSMarc Zyngier static void its_lpi_free_chunks(unsigned long *bitmap, int base, int nr_ids) 1384bf9529f8SMarc Zyngier { 1385bf9529f8SMarc Zyngier int lpi; 1386bf9529f8SMarc Zyngier 1387bf9529f8SMarc Zyngier spin_lock(&lpi_lock); 1388bf9529f8SMarc Zyngier 1389bf9529f8SMarc Zyngier for (lpi = base; lpi < (base + nr_ids); lpi += IRQS_PER_CHUNK) { 1390bf9529f8SMarc Zyngier int chunk = its_lpi_to_chunk(lpi); 1391cf2be8baSMarc Zyngier 1392bf9529f8SMarc Zyngier BUG_ON(chunk > lpi_chunks); 1393bf9529f8SMarc Zyngier if (test_bit(chunk, lpi_bitmap)) { 1394bf9529f8SMarc Zyngier clear_bit(chunk, lpi_bitmap); 1395bf9529f8SMarc Zyngier } else { 1396bf9529f8SMarc Zyngier pr_err("Bad LPI chunk %d\n", chunk); 1397bf9529f8SMarc Zyngier } 1398bf9529f8SMarc Zyngier } 1399bf9529f8SMarc Zyngier 1400bf9529f8SMarc Zyngier spin_unlock(&lpi_lock); 1401bf9529f8SMarc Zyngier 1402cf2be8baSMarc Zyngier kfree(bitmap); 1403bf9529f8SMarc Zyngier } 14041ac19ca6SMarc Zyngier 14050e5ccf91SMarc Zyngier static struct page *its_allocate_prop_table(gfp_t gfp_flags) 14060e5ccf91SMarc Zyngier { 14070e5ccf91SMarc Zyngier struct page *prop_page; 14080e5ccf91SMarc Zyngier 14090e5ccf91SMarc Zyngier prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); 14100e5ccf91SMarc Zyngier if (!prop_page) 14110e5ccf91SMarc Zyngier return NULL; 14120e5ccf91SMarc Zyngier 14130e5ccf91SMarc Zyngier /* Priority 0xa0, Group-1, disabled */ 14140e5ccf91SMarc Zyngier memset(page_address(prop_page), 14150e5ccf91SMarc Zyngier LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, 14160e5ccf91SMarc Zyngier LPI_PROPBASE_SZ); 14170e5ccf91SMarc Zyngier 14180e5ccf91SMarc Zyngier /* Make sure the GIC will observe the written configuration */ 14190e5ccf91SMarc Zyngier gic_flush_dcache_to_poc(page_address(prop_page), LPI_PROPBASE_SZ); 14200e5ccf91SMarc Zyngier 14210e5ccf91SMarc Zyngier return prop_page; 14220e5ccf91SMarc Zyngier } 14230e5ccf91SMarc Zyngier 14247d75bbb4SMarc Zyngier static void its_free_prop_table(struct page *prop_page) 14257d75bbb4SMarc Zyngier { 14267d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(prop_page), 14277d75bbb4SMarc Zyngier get_order(LPI_PROPBASE_SZ)); 14287d75bbb4SMarc Zyngier } 14290e5ccf91SMarc Zyngier 14301ac19ca6SMarc Zyngier static int __init its_alloc_lpi_tables(void) 14311ac19ca6SMarc Zyngier { 14321ac19ca6SMarc Zyngier phys_addr_t paddr; 14331ac19ca6SMarc Zyngier 14346c31e123SShanker Donthineni lpi_id_bits = min_t(u32, gic_rdists->id_bits, ITS_MAX_LPI_NRBITS); 14350e5ccf91SMarc Zyngier gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT); 14361ac19ca6SMarc Zyngier if (!gic_rdists->prop_page) { 14371ac19ca6SMarc Zyngier pr_err("Failed to allocate PROPBASE\n"); 14381ac19ca6SMarc Zyngier return -ENOMEM; 14391ac19ca6SMarc Zyngier } 14401ac19ca6SMarc Zyngier 14411ac19ca6SMarc Zyngier paddr = page_to_phys(gic_rdists->prop_page); 14421ac19ca6SMarc Zyngier pr_info("GIC: using LPI property table @%pa\n", &paddr); 14431ac19ca6SMarc Zyngier 14446c31e123SShanker Donthineni return its_lpi_init(lpi_id_bits); 14451ac19ca6SMarc Zyngier } 14461ac19ca6SMarc Zyngier 14471ac19ca6SMarc Zyngier static const char *its_base_type_string[] = { 14481ac19ca6SMarc Zyngier [GITS_BASER_TYPE_DEVICE] = "Devices", 14491ac19ca6SMarc Zyngier [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", 14504f46de9dSMarc Zyngier [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", 14511ac19ca6SMarc Zyngier [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", 14521ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", 14531ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", 14541ac19ca6SMarc Zyngier [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", 14551ac19ca6SMarc Zyngier }; 14561ac19ca6SMarc Zyngier 14572d81d425SShanker Donthineni static u64 its_read_baser(struct its_node *its, struct its_baser *baser) 14582d81d425SShanker Donthineni { 14592d81d425SShanker Donthineni u32 idx = baser - its->tables; 14602d81d425SShanker Donthineni 14610968a619SVladimir Murzin return gits_read_baser(its->base + GITS_BASER + (idx << 3)); 14622d81d425SShanker Donthineni } 14632d81d425SShanker Donthineni 14642d81d425SShanker Donthineni static void its_write_baser(struct its_node *its, struct its_baser *baser, 14652d81d425SShanker Donthineni u64 val) 14662d81d425SShanker Donthineni { 14672d81d425SShanker Donthineni u32 idx = baser - its->tables; 14682d81d425SShanker Donthineni 14690968a619SVladimir Murzin gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); 14702d81d425SShanker Donthineni baser->val = its_read_baser(its, baser); 14712d81d425SShanker Donthineni } 14722d81d425SShanker Donthineni 14739347359aSShanker Donthineni static int its_setup_baser(struct its_node *its, struct its_baser *baser, 14743faf24eaSShanker Donthineni u64 cache, u64 shr, u32 psz, u32 order, 14753faf24eaSShanker Donthineni bool indirect) 14769347359aSShanker Donthineni { 14779347359aSShanker Donthineni u64 val = its_read_baser(its, baser); 14789347359aSShanker Donthineni u64 esz = GITS_BASER_ENTRY_SIZE(val); 14799347359aSShanker Donthineni u64 type = GITS_BASER_TYPE(val); 14809347359aSShanker Donthineni u32 alloc_pages; 14819347359aSShanker Donthineni void *base; 14829347359aSShanker Donthineni u64 tmp; 14839347359aSShanker Donthineni 14849347359aSShanker Donthineni retry_alloc_baser: 14859347359aSShanker Donthineni alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); 14869347359aSShanker Donthineni if (alloc_pages > GITS_BASER_PAGES_MAX) { 14879347359aSShanker Donthineni pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", 14889347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 14899347359aSShanker Donthineni alloc_pages, GITS_BASER_PAGES_MAX); 14909347359aSShanker Donthineni alloc_pages = GITS_BASER_PAGES_MAX; 14919347359aSShanker Donthineni order = get_order(GITS_BASER_PAGES_MAX * psz); 14929347359aSShanker Donthineni } 14939347359aSShanker Donthineni 14949347359aSShanker Donthineni base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order); 14959347359aSShanker Donthineni if (!base) 14969347359aSShanker Donthineni return -ENOMEM; 14979347359aSShanker Donthineni 14989347359aSShanker Donthineni retry_baser: 14999347359aSShanker Donthineni val = (virt_to_phys(base) | 15009347359aSShanker Donthineni (type << GITS_BASER_TYPE_SHIFT) | 15019347359aSShanker Donthineni ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | 15029347359aSShanker Donthineni ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | 15039347359aSShanker Donthineni cache | 15049347359aSShanker Donthineni shr | 15059347359aSShanker Donthineni GITS_BASER_VALID); 15069347359aSShanker Donthineni 15073faf24eaSShanker Donthineni val |= indirect ? GITS_BASER_INDIRECT : 0x0; 15083faf24eaSShanker Donthineni 15099347359aSShanker Donthineni switch (psz) { 15109347359aSShanker Donthineni case SZ_4K: 15119347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_4K; 15129347359aSShanker Donthineni break; 15139347359aSShanker Donthineni case SZ_16K: 15149347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_16K; 15159347359aSShanker Donthineni break; 15169347359aSShanker Donthineni case SZ_64K: 15179347359aSShanker Donthineni val |= GITS_BASER_PAGE_SIZE_64K; 15189347359aSShanker Donthineni break; 15199347359aSShanker Donthineni } 15209347359aSShanker Donthineni 15219347359aSShanker Donthineni its_write_baser(its, baser, val); 15229347359aSShanker Donthineni tmp = baser->val; 15239347359aSShanker Donthineni 15249347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { 15259347359aSShanker Donthineni /* 15269347359aSShanker Donthineni * Shareability didn't stick. Just use 15279347359aSShanker Donthineni * whatever the read reported, which is likely 15289347359aSShanker Donthineni * to be the only thing this redistributor 15299347359aSShanker Donthineni * supports. If that's zero, make it 15309347359aSShanker Donthineni * non-cacheable as well. 15319347359aSShanker Donthineni */ 15329347359aSShanker Donthineni shr = tmp & GITS_BASER_SHAREABILITY_MASK; 15339347359aSShanker Donthineni if (!shr) { 15349347359aSShanker Donthineni cache = GITS_BASER_nC; 1535328191c0SVladimir Murzin gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); 15369347359aSShanker Donthineni } 15379347359aSShanker Donthineni goto retry_baser; 15389347359aSShanker Donthineni } 15399347359aSShanker Donthineni 15409347359aSShanker Donthineni if ((val ^ tmp) & GITS_BASER_PAGE_SIZE_MASK) { 15419347359aSShanker Donthineni /* 15429347359aSShanker Donthineni * Page size didn't stick. Let's try a smaller 15439347359aSShanker Donthineni * size and retry. If we reach 4K, then 15449347359aSShanker Donthineni * something is horribly wrong... 15459347359aSShanker Donthineni */ 15469347359aSShanker Donthineni free_pages((unsigned long)base, order); 15479347359aSShanker Donthineni baser->base = NULL; 15489347359aSShanker Donthineni 15499347359aSShanker Donthineni switch (psz) { 15509347359aSShanker Donthineni case SZ_16K: 15519347359aSShanker Donthineni psz = SZ_4K; 15529347359aSShanker Donthineni goto retry_alloc_baser; 15539347359aSShanker Donthineni case SZ_64K: 15549347359aSShanker Donthineni psz = SZ_16K; 15559347359aSShanker Donthineni goto retry_alloc_baser; 15569347359aSShanker Donthineni } 15579347359aSShanker Donthineni } 15589347359aSShanker Donthineni 15599347359aSShanker Donthineni if (val != tmp) { 1560b11283ebSVladimir Murzin pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", 15619347359aSShanker Donthineni &its->phys_base, its_base_type_string[type], 1562b11283ebSVladimir Murzin val, tmp); 15639347359aSShanker Donthineni free_pages((unsigned long)base, order); 15649347359aSShanker Donthineni return -ENXIO; 15659347359aSShanker Donthineni } 15669347359aSShanker Donthineni 15679347359aSShanker Donthineni baser->order = order; 15689347359aSShanker Donthineni baser->base = base; 15699347359aSShanker Donthineni baser->psz = psz; 15703faf24eaSShanker Donthineni tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; 15719347359aSShanker Donthineni 15723faf24eaSShanker Donthineni pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", 1573d524eaa2SVladimir Murzin &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), 15749347359aSShanker Donthineni its_base_type_string[type], 15759347359aSShanker Donthineni (unsigned long)virt_to_phys(base), 15763faf24eaSShanker Donthineni indirect ? "indirect" : "flat", (int)esz, 15779347359aSShanker Donthineni psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); 15789347359aSShanker Donthineni 15799347359aSShanker Donthineni return 0; 15809347359aSShanker Donthineni } 15819347359aSShanker Donthineni 15824cacac57SMarc Zyngier static bool its_parse_indirect_baser(struct its_node *its, 15834cacac57SMarc Zyngier struct its_baser *baser, 15843faf24eaSShanker Donthineni u32 psz, u32 *order) 15854b75c459SShanker Donthineni { 15864cacac57SMarc Zyngier u64 tmp = its_read_baser(its, baser); 15874cacac57SMarc Zyngier u64 type = GITS_BASER_TYPE(tmp); 15884cacac57SMarc Zyngier u64 esz = GITS_BASER_ENTRY_SIZE(tmp); 15892fd632a0SShanker Donthineni u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; 15904b75c459SShanker Donthineni u32 ids = its->device_ids; 15914b75c459SShanker Donthineni u32 new_order = *order; 15923faf24eaSShanker Donthineni bool indirect = false; 15933faf24eaSShanker Donthineni 15943faf24eaSShanker Donthineni /* No need to enable Indirection if memory requirement < (psz*2)bytes */ 15953faf24eaSShanker Donthineni if ((esz << ids) > (psz * 2)) { 15963faf24eaSShanker Donthineni /* 15973faf24eaSShanker Donthineni * Find out whether hw supports a single or two-level table by 15983faf24eaSShanker Donthineni * table by reading bit at offset '62' after writing '1' to it. 15993faf24eaSShanker Donthineni */ 16003faf24eaSShanker Donthineni its_write_baser(its, baser, val | GITS_BASER_INDIRECT); 16013faf24eaSShanker Donthineni indirect = !!(baser->val & GITS_BASER_INDIRECT); 16023faf24eaSShanker Donthineni 16033faf24eaSShanker Donthineni if (indirect) { 16043faf24eaSShanker Donthineni /* 16053faf24eaSShanker Donthineni * The size of the lvl2 table is equal to ITS page size 16063faf24eaSShanker Donthineni * which is 'psz'. For computing lvl1 table size, 16073faf24eaSShanker Donthineni * subtract ID bits that sparse lvl2 table from 'ids' 16083faf24eaSShanker Donthineni * which is reported by ITS hardware times lvl1 table 16093faf24eaSShanker Donthineni * entry size. 16103faf24eaSShanker Donthineni */ 1611d524eaa2SVladimir Murzin ids -= ilog2(psz / (int)esz); 16123faf24eaSShanker Donthineni esz = GITS_LVL1_ENTRY_SIZE; 16133faf24eaSShanker Donthineni } 16143faf24eaSShanker Donthineni } 16154b75c459SShanker Donthineni 16164b75c459SShanker Donthineni /* 16174b75c459SShanker Donthineni * Allocate as many entries as required to fit the 16184b75c459SShanker Donthineni * range of device IDs that the ITS can grok... The ID 16194b75c459SShanker Donthineni * space being incredibly sparse, this results in a 16203faf24eaSShanker Donthineni * massive waste of memory if two-level device table 16213faf24eaSShanker Donthineni * feature is not supported by hardware. 16224b75c459SShanker Donthineni */ 16234b75c459SShanker Donthineni new_order = max_t(u32, get_order(esz << ids), new_order); 16244b75c459SShanker Donthineni if (new_order >= MAX_ORDER) { 16254b75c459SShanker Donthineni new_order = MAX_ORDER - 1; 1626d524eaa2SVladimir Murzin ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); 16274cacac57SMarc Zyngier pr_warn("ITS@%pa: %s Table too large, reduce ids %u->%u\n", 16284cacac57SMarc Zyngier &its->phys_base, its_base_type_string[type], 16294cacac57SMarc Zyngier its->device_ids, ids); 16304b75c459SShanker Donthineni } 16314b75c459SShanker Donthineni 16324b75c459SShanker Donthineni *order = new_order; 16333faf24eaSShanker Donthineni 16343faf24eaSShanker Donthineni return indirect; 16354b75c459SShanker Donthineni } 16364b75c459SShanker Donthineni 16371ac19ca6SMarc Zyngier static void its_free_tables(struct its_node *its) 16381ac19ca6SMarc Zyngier { 16391ac19ca6SMarc Zyngier int i; 16401ac19ca6SMarc Zyngier 16411ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 16421a485f4dSShanker Donthineni if (its->tables[i].base) { 16431a485f4dSShanker Donthineni free_pages((unsigned long)its->tables[i].base, 16441a485f4dSShanker Donthineni its->tables[i].order); 16451a485f4dSShanker Donthineni its->tables[i].base = NULL; 16461ac19ca6SMarc Zyngier } 16471ac19ca6SMarc Zyngier } 16481ac19ca6SMarc Zyngier } 16491ac19ca6SMarc Zyngier 16500e0b0f69SShanker Donthineni static int its_alloc_tables(struct its_node *its) 16511ac19ca6SMarc Zyngier { 1652589ce5f4SMarc Zyngier u64 typer = gic_read_typer(its->base + GITS_TYPER); 16539347359aSShanker Donthineni u32 ids = GITS_TYPER_DEVBITS(typer); 16541ac19ca6SMarc Zyngier u64 shr = GITS_BASER_InnerShareable; 16552fd632a0SShanker Donthineni u64 cache = GITS_BASER_RaWaWb; 16569347359aSShanker Donthineni u32 psz = SZ_64K; 16579347359aSShanker Donthineni int err, i; 165894100970SRobert Richter 165994100970SRobert Richter if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) { 166094100970SRobert Richter /* 166194100970SRobert Richter * erratum 22375: only alloc 8MB table size 166294100970SRobert Richter * erratum 24313: ignore memory access type 166394100970SRobert Richter */ 16649347359aSShanker Donthineni cache = GITS_BASER_nCnB; 166594100970SRobert Richter ids = 0x14; /* 20 bits, 8MB */ 166694100970SRobert Richter } 16671ac19ca6SMarc Zyngier 1668466b7d16SShanker Donthineni its->device_ids = ids; 1669466b7d16SShanker Donthineni 16701ac19ca6SMarc Zyngier for (i = 0; i < GITS_BASER_NR_REGS; i++) { 16712d81d425SShanker Donthineni struct its_baser *baser = its->tables + i; 16722d81d425SShanker Donthineni u64 val = its_read_baser(its, baser); 16731ac19ca6SMarc Zyngier u64 type = GITS_BASER_TYPE(val); 16749347359aSShanker Donthineni u32 order = get_order(psz); 16753faf24eaSShanker Donthineni bool indirect = false; 16761ac19ca6SMarc Zyngier 16774cacac57SMarc Zyngier switch (type) { 16784cacac57SMarc Zyngier case GITS_BASER_TYPE_NONE: 16791ac19ca6SMarc Zyngier continue; 16801ac19ca6SMarc Zyngier 16814cacac57SMarc Zyngier case GITS_BASER_TYPE_DEVICE: 16824cacac57SMarc Zyngier case GITS_BASER_TYPE_VCPU: 16834cacac57SMarc Zyngier indirect = its_parse_indirect_baser(its, baser, 16844cacac57SMarc Zyngier psz, &order); 16854cacac57SMarc Zyngier break; 16864cacac57SMarc Zyngier } 1687f54b97edSMarc Zyngier 16883faf24eaSShanker Donthineni err = its_setup_baser(its, baser, cache, shr, psz, order, indirect); 16899347359aSShanker Donthineni if (err < 0) { 16909347359aSShanker Donthineni its_free_tables(its); 16919347359aSShanker Donthineni return err; 169230f21363SRobert Richter } 169330f21363SRobert Richter 16949347359aSShanker Donthineni /* Update settings which will be used for next BASERn */ 16959347359aSShanker Donthineni psz = baser->psz; 16969347359aSShanker Donthineni cache = baser->val & GITS_BASER_CACHEABILITY_MASK; 16979347359aSShanker Donthineni shr = baser->val & GITS_BASER_SHAREABILITY_MASK; 16981ac19ca6SMarc Zyngier } 16991ac19ca6SMarc Zyngier 17001ac19ca6SMarc Zyngier return 0; 17011ac19ca6SMarc Zyngier } 17021ac19ca6SMarc Zyngier 17031ac19ca6SMarc Zyngier static int its_alloc_collections(struct its_node *its) 17041ac19ca6SMarc Zyngier { 17051ac19ca6SMarc Zyngier its->collections = kzalloc(nr_cpu_ids * sizeof(*its->collections), 17061ac19ca6SMarc Zyngier GFP_KERNEL); 17071ac19ca6SMarc Zyngier if (!its->collections) 17081ac19ca6SMarc Zyngier return -ENOMEM; 17091ac19ca6SMarc Zyngier 17101ac19ca6SMarc Zyngier return 0; 17111ac19ca6SMarc Zyngier } 17121ac19ca6SMarc Zyngier 17137c297a2dSMarc Zyngier static struct page *its_allocate_pending_table(gfp_t gfp_flags) 17147c297a2dSMarc Zyngier { 17157c297a2dSMarc Zyngier struct page *pend_page; 17167c297a2dSMarc Zyngier /* 17177c297a2dSMarc Zyngier * The pending pages have to be at least 64kB aligned, 17187c297a2dSMarc Zyngier * hence the 'max(LPI_PENDBASE_SZ, SZ_64K)' below. 17197c297a2dSMarc Zyngier */ 17207c297a2dSMarc Zyngier pend_page = alloc_pages(gfp_flags | __GFP_ZERO, 17217c297a2dSMarc Zyngier get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K))); 17227c297a2dSMarc Zyngier if (!pend_page) 17237c297a2dSMarc Zyngier return NULL; 17247c297a2dSMarc Zyngier 17257c297a2dSMarc Zyngier /* Make sure the GIC will observe the zero-ed page */ 17267c297a2dSMarc Zyngier gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); 17277c297a2dSMarc Zyngier 17287c297a2dSMarc Zyngier return pend_page; 17297c297a2dSMarc Zyngier } 17307c297a2dSMarc Zyngier 17317d75bbb4SMarc Zyngier static void its_free_pending_table(struct page *pt) 17327d75bbb4SMarc Zyngier { 17337d75bbb4SMarc Zyngier free_pages((unsigned long)page_address(pt), 17347d75bbb4SMarc Zyngier get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K))); 17357d75bbb4SMarc Zyngier } 17367d75bbb4SMarc Zyngier 17371ac19ca6SMarc Zyngier static void its_cpu_init_lpis(void) 17381ac19ca6SMarc Zyngier { 17391ac19ca6SMarc Zyngier void __iomem *rbase = gic_data_rdist_rd_base(); 17401ac19ca6SMarc Zyngier struct page *pend_page; 17411ac19ca6SMarc Zyngier u64 val, tmp; 17421ac19ca6SMarc Zyngier 17431ac19ca6SMarc Zyngier /* If we didn't allocate the pending table yet, do it now */ 17441ac19ca6SMarc Zyngier pend_page = gic_data_rdist()->pend_page; 17451ac19ca6SMarc Zyngier if (!pend_page) { 17461ac19ca6SMarc Zyngier phys_addr_t paddr; 17477c297a2dSMarc Zyngier 17487c297a2dSMarc Zyngier pend_page = its_allocate_pending_table(GFP_NOWAIT); 17491ac19ca6SMarc Zyngier if (!pend_page) { 17501ac19ca6SMarc Zyngier pr_err("Failed to allocate PENDBASE for CPU%d\n", 17511ac19ca6SMarc Zyngier smp_processor_id()); 17521ac19ca6SMarc Zyngier return; 17531ac19ca6SMarc Zyngier } 17541ac19ca6SMarc Zyngier 17551ac19ca6SMarc Zyngier paddr = page_to_phys(pend_page); 17561ac19ca6SMarc Zyngier pr_info("CPU%d: using LPI pending table @%pa\n", 17571ac19ca6SMarc Zyngier smp_processor_id(), &paddr); 17581ac19ca6SMarc Zyngier gic_data_rdist()->pend_page = pend_page; 17591ac19ca6SMarc Zyngier } 17601ac19ca6SMarc Zyngier 17611ac19ca6SMarc Zyngier /* Disable LPIs */ 17621ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 17631ac19ca6SMarc Zyngier val &= ~GICR_CTLR_ENABLE_LPIS; 17641ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 17651ac19ca6SMarc Zyngier 17661ac19ca6SMarc Zyngier /* 17671ac19ca6SMarc Zyngier * Make sure any change to the table is observable by the GIC. 17681ac19ca6SMarc Zyngier */ 17691ac19ca6SMarc Zyngier dsb(sy); 17701ac19ca6SMarc Zyngier 17711ac19ca6SMarc Zyngier /* set PROPBASE */ 17721ac19ca6SMarc Zyngier val = (page_to_phys(gic_rdists->prop_page) | 17731ac19ca6SMarc Zyngier GICR_PROPBASER_InnerShareable | 17742fd632a0SShanker Donthineni GICR_PROPBASER_RaWaWb | 17751ac19ca6SMarc Zyngier ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); 17761ac19ca6SMarc Zyngier 17770968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 17780968a619SVladimir Murzin tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); 17791ac19ca6SMarc Zyngier 17801ac19ca6SMarc Zyngier if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { 1781241a386cSMarc Zyngier if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { 1782241a386cSMarc Zyngier /* 1783241a386cSMarc Zyngier * The HW reports non-shareable, we must 1784241a386cSMarc Zyngier * remove the cacheability attributes as 1785241a386cSMarc Zyngier * well. 1786241a386cSMarc Zyngier */ 1787241a386cSMarc Zyngier val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | 1788241a386cSMarc Zyngier GICR_PROPBASER_CACHEABILITY_MASK); 1789241a386cSMarc Zyngier val |= GICR_PROPBASER_nC; 17900968a619SVladimir Murzin gicr_write_propbaser(val, rbase + GICR_PROPBASER); 1791241a386cSMarc Zyngier } 17921ac19ca6SMarc Zyngier pr_info_once("GIC: using cache flushing for LPI property table\n"); 17931ac19ca6SMarc Zyngier gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; 17941ac19ca6SMarc Zyngier } 17951ac19ca6SMarc Zyngier 17961ac19ca6SMarc Zyngier /* set PENDBASE */ 17971ac19ca6SMarc Zyngier val = (page_to_phys(pend_page) | 17984ad3e363SMarc Zyngier GICR_PENDBASER_InnerShareable | 17992fd632a0SShanker Donthineni GICR_PENDBASER_RaWaWb); 18001ac19ca6SMarc Zyngier 18010968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 18020968a619SVladimir Murzin tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); 1803241a386cSMarc Zyngier 1804241a386cSMarc Zyngier if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { 1805241a386cSMarc Zyngier /* 1806241a386cSMarc Zyngier * The HW reports non-shareable, we must remove the 1807241a386cSMarc Zyngier * cacheability attributes as well. 1808241a386cSMarc Zyngier */ 1809241a386cSMarc Zyngier val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | 1810241a386cSMarc Zyngier GICR_PENDBASER_CACHEABILITY_MASK); 1811241a386cSMarc Zyngier val |= GICR_PENDBASER_nC; 18120968a619SVladimir Murzin gicr_write_pendbaser(val, rbase + GICR_PENDBASER); 1813241a386cSMarc Zyngier } 18141ac19ca6SMarc Zyngier 18151ac19ca6SMarc Zyngier /* Enable LPIs */ 18161ac19ca6SMarc Zyngier val = readl_relaxed(rbase + GICR_CTLR); 18171ac19ca6SMarc Zyngier val |= GICR_CTLR_ENABLE_LPIS; 18181ac19ca6SMarc Zyngier writel_relaxed(val, rbase + GICR_CTLR); 18191ac19ca6SMarc Zyngier 18201ac19ca6SMarc Zyngier /* Make sure the GIC has seen the above */ 18211ac19ca6SMarc Zyngier dsb(sy); 18221ac19ca6SMarc Zyngier } 18231ac19ca6SMarc Zyngier 18241ac19ca6SMarc Zyngier static void its_cpu_init_collection(void) 18251ac19ca6SMarc Zyngier { 18261ac19ca6SMarc Zyngier struct its_node *its; 18271ac19ca6SMarc Zyngier int cpu; 18281ac19ca6SMarc Zyngier 18291ac19ca6SMarc Zyngier spin_lock(&its_lock); 18301ac19ca6SMarc Zyngier cpu = smp_processor_id(); 18311ac19ca6SMarc Zyngier 18321ac19ca6SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 18331ac19ca6SMarc Zyngier u64 target; 18341ac19ca6SMarc Zyngier 1835fbf8f40eSGanapatrao Kulkarni /* avoid cross node collections and its mapping */ 1836fbf8f40eSGanapatrao Kulkarni if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { 1837fbf8f40eSGanapatrao Kulkarni struct device_node *cpu_node; 1838fbf8f40eSGanapatrao Kulkarni 1839fbf8f40eSGanapatrao Kulkarni cpu_node = of_get_cpu_node(cpu, NULL); 1840fbf8f40eSGanapatrao Kulkarni if (its->numa_node != NUMA_NO_NODE && 1841fbf8f40eSGanapatrao Kulkarni its->numa_node != of_node_to_nid(cpu_node)) 1842fbf8f40eSGanapatrao Kulkarni continue; 1843fbf8f40eSGanapatrao Kulkarni } 1844fbf8f40eSGanapatrao Kulkarni 18451ac19ca6SMarc Zyngier /* 18461ac19ca6SMarc Zyngier * We now have to bind each collection to its target 18471ac19ca6SMarc Zyngier * redistributor. 18481ac19ca6SMarc Zyngier */ 1849589ce5f4SMarc Zyngier if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { 18501ac19ca6SMarc Zyngier /* 18511ac19ca6SMarc Zyngier * This ITS wants the physical address of the 18521ac19ca6SMarc Zyngier * redistributor. 18531ac19ca6SMarc Zyngier */ 18541ac19ca6SMarc Zyngier target = gic_data_rdist()->phys_base; 18551ac19ca6SMarc Zyngier } else { 18561ac19ca6SMarc Zyngier /* 18571ac19ca6SMarc Zyngier * This ITS wants a linear CPU number. 18581ac19ca6SMarc Zyngier */ 1859589ce5f4SMarc Zyngier target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); 1860263fcd31SMarc Zyngier target = GICR_TYPER_CPU_NUMBER(target) << 16; 18611ac19ca6SMarc Zyngier } 18621ac19ca6SMarc Zyngier 18631ac19ca6SMarc Zyngier /* Perform collection mapping */ 18641ac19ca6SMarc Zyngier its->collections[cpu].target_address = target; 18651ac19ca6SMarc Zyngier its->collections[cpu].col_id = cpu; 18661ac19ca6SMarc Zyngier 18671ac19ca6SMarc Zyngier its_send_mapc(its, &its->collections[cpu], 1); 18681ac19ca6SMarc Zyngier its_send_invall(its, &its->collections[cpu]); 18691ac19ca6SMarc Zyngier } 18701ac19ca6SMarc Zyngier 18711ac19ca6SMarc Zyngier spin_unlock(&its_lock); 18721ac19ca6SMarc Zyngier } 187384a6a2e7SMarc Zyngier 187484a6a2e7SMarc Zyngier static struct its_device *its_find_device(struct its_node *its, u32 dev_id) 187584a6a2e7SMarc Zyngier { 187684a6a2e7SMarc Zyngier struct its_device *its_dev = NULL, *tmp; 18773e39e8f5SMarc Zyngier unsigned long flags; 187884a6a2e7SMarc Zyngier 18793e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 188084a6a2e7SMarc Zyngier 188184a6a2e7SMarc Zyngier list_for_each_entry(tmp, &its->its_device_list, entry) { 188284a6a2e7SMarc Zyngier if (tmp->device_id == dev_id) { 188384a6a2e7SMarc Zyngier its_dev = tmp; 188484a6a2e7SMarc Zyngier break; 188584a6a2e7SMarc Zyngier } 188684a6a2e7SMarc Zyngier } 188784a6a2e7SMarc Zyngier 18883e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 188984a6a2e7SMarc Zyngier 189084a6a2e7SMarc Zyngier return its_dev; 189184a6a2e7SMarc Zyngier } 189284a6a2e7SMarc Zyngier 1893466b7d16SShanker Donthineni static struct its_baser *its_get_baser(struct its_node *its, u32 type) 1894466b7d16SShanker Donthineni { 1895466b7d16SShanker Donthineni int i; 1896466b7d16SShanker Donthineni 1897466b7d16SShanker Donthineni for (i = 0; i < GITS_BASER_NR_REGS; i++) { 1898466b7d16SShanker Donthineni if (GITS_BASER_TYPE(its->tables[i].val) == type) 1899466b7d16SShanker Donthineni return &its->tables[i]; 1900466b7d16SShanker Donthineni } 1901466b7d16SShanker Donthineni 1902466b7d16SShanker Donthineni return NULL; 1903466b7d16SShanker Donthineni } 1904466b7d16SShanker Donthineni 190570cc81edSMarc Zyngier static bool its_alloc_table_entry(struct its_baser *baser, u32 id) 19063faf24eaSShanker Donthineni { 19073faf24eaSShanker Donthineni struct page *page; 19083faf24eaSShanker Donthineni u32 esz, idx; 19093faf24eaSShanker Donthineni __le64 *table; 19103faf24eaSShanker Donthineni 19113faf24eaSShanker Donthineni /* Don't allow device id that exceeds single, flat table limit */ 19123faf24eaSShanker Donthineni esz = GITS_BASER_ENTRY_SIZE(baser->val); 19133faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_INDIRECT)) 191470cc81edSMarc Zyngier return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); 19153faf24eaSShanker Donthineni 19163faf24eaSShanker Donthineni /* Compute 1st level table index & check if that exceeds table limit */ 191770cc81edSMarc Zyngier idx = id >> ilog2(baser->psz / esz); 19183faf24eaSShanker Donthineni if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) 19193faf24eaSShanker Donthineni return false; 19203faf24eaSShanker Donthineni 19213faf24eaSShanker Donthineni table = baser->base; 19223faf24eaSShanker Donthineni 19233faf24eaSShanker Donthineni /* Allocate memory for 2nd level table */ 19243faf24eaSShanker Donthineni if (!table[idx]) { 19253faf24eaSShanker Donthineni page = alloc_pages(GFP_KERNEL | __GFP_ZERO, get_order(baser->psz)); 19263faf24eaSShanker Donthineni if (!page) 19273faf24eaSShanker Donthineni return false; 19283faf24eaSShanker Donthineni 19293faf24eaSShanker Donthineni /* Flush Lvl2 table to PoC if hw doesn't support coherency */ 19303faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 1931328191c0SVladimir Murzin gic_flush_dcache_to_poc(page_address(page), baser->psz); 19323faf24eaSShanker Donthineni 19333faf24eaSShanker Donthineni table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); 19343faf24eaSShanker Donthineni 19353faf24eaSShanker Donthineni /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ 19363faf24eaSShanker Donthineni if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) 1937328191c0SVladimir Murzin gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); 19383faf24eaSShanker Donthineni 19393faf24eaSShanker Donthineni /* Ensure updated table contents are visible to ITS hardware */ 19403faf24eaSShanker Donthineni dsb(sy); 19413faf24eaSShanker Donthineni } 19423faf24eaSShanker Donthineni 19433faf24eaSShanker Donthineni return true; 19443faf24eaSShanker Donthineni } 19453faf24eaSShanker Donthineni 194670cc81edSMarc Zyngier static bool its_alloc_device_table(struct its_node *its, u32 dev_id) 194770cc81edSMarc Zyngier { 194870cc81edSMarc Zyngier struct its_baser *baser; 194970cc81edSMarc Zyngier 195070cc81edSMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); 195170cc81edSMarc Zyngier 195270cc81edSMarc Zyngier /* Don't allow device id that exceeds ITS hardware limit */ 195370cc81edSMarc Zyngier if (!baser) 195470cc81edSMarc Zyngier return (ilog2(dev_id) < its->device_ids); 195570cc81edSMarc Zyngier 195670cc81edSMarc Zyngier return its_alloc_table_entry(baser, dev_id); 195770cc81edSMarc Zyngier } 195870cc81edSMarc Zyngier 19597d75bbb4SMarc Zyngier static bool its_alloc_vpe_table(u32 vpe_id) 19607d75bbb4SMarc Zyngier { 19617d75bbb4SMarc Zyngier struct its_node *its; 19627d75bbb4SMarc Zyngier 19637d75bbb4SMarc Zyngier /* 19647d75bbb4SMarc Zyngier * Make sure the L2 tables are allocated on *all* v4 ITSs. We 19657d75bbb4SMarc Zyngier * could try and only do it on ITSs corresponding to devices 19667d75bbb4SMarc Zyngier * that have interrupts targeted at this VPE, but the 19677d75bbb4SMarc Zyngier * complexity becomes crazy (and you have tons of memory 19687d75bbb4SMarc Zyngier * anyway, right?). 19697d75bbb4SMarc Zyngier */ 19707d75bbb4SMarc Zyngier list_for_each_entry(its, &its_nodes, entry) { 19717d75bbb4SMarc Zyngier struct its_baser *baser; 19727d75bbb4SMarc Zyngier 19737d75bbb4SMarc Zyngier if (!its->is_v4) 19747d75bbb4SMarc Zyngier continue; 19757d75bbb4SMarc Zyngier 19767d75bbb4SMarc Zyngier baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); 19777d75bbb4SMarc Zyngier if (!baser) 19787d75bbb4SMarc Zyngier return false; 19797d75bbb4SMarc Zyngier 19807d75bbb4SMarc Zyngier if (!its_alloc_table_entry(baser, vpe_id)) 19817d75bbb4SMarc Zyngier return false; 19827d75bbb4SMarc Zyngier } 19837d75bbb4SMarc Zyngier 19847d75bbb4SMarc Zyngier return true; 19857d75bbb4SMarc Zyngier } 19867d75bbb4SMarc Zyngier 198784a6a2e7SMarc Zyngier static struct its_device *its_create_device(struct its_node *its, u32 dev_id, 198893f94ea0SMarc Zyngier int nvecs, bool alloc_lpis) 198984a6a2e7SMarc Zyngier { 199084a6a2e7SMarc Zyngier struct its_device *dev; 199193f94ea0SMarc Zyngier unsigned long *lpi_map = NULL; 19923e39e8f5SMarc Zyngier unsigned long flags; 1993591e5becSMarc Zyngier u16 *col_map = NULL; 199484a6a2e7SMarc Zyngier void *itt; 199584a6a2e7SMarc Zyngier int lpi_base; 199684a6a2e7SMarc Zyngier int nr_lpis; 1997c8481267SMarc Zyngier int nr_ites; 199884a6a2e7SMarc Zyngier int sz; 199984a6a2e7SMarc Zyngier 20003faf24eaSShanker Donthineni if (!its_alloc_device_table(its, dev_id)) 2001466b7d16SShanker Donthineni return NULL; 2002466b7d16SShanker Donthineni 200384a6a2e7SMarc Zyngier dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2004c8481267SMarc Zyngier /* 2005c8481267SMarc Zyngier * At least one bit of EventID is being used, hence a minimum 2006c8481267SMarc Zyngier * of two entries. No, the architecture doesn't let you 2007c8481267SMarc Zyngier * express an ITT with a single entry. 2008c8481267SMarc Zyngier */ 200996555c47SWill Deacon nr_ites = max(2UL, roundup_pow_of_two(nvecs)); 2010c8481267SMarc Zyngier sz = nr_ites * its->ite_size; 201184a6a2e7SMarc Zyngier sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; 20126c834125SYun Wu itt = kzalloc(sz, GFP_KERNEL); 201393f94ea0SMarc Zyngier if (alloc_lpis) { 201484a6a2e7SMarc Zyngier lpi_map = its_lpi_alloc_chunks(nvecs, &lpi_base, &nr_lpis); 2015591e5becSMarc Zyngier if (lpi_map) 201693f94ea0SMarc Zyngier col_map = kzalloc(sizeof(*col_map) * nr_lpis, 201793f94ea0SMarc Zyngier GFP_KERNEL); 201893f94ea0SMarc Zyngier } else { 201993f94ea0SMarc Zyngier col_map = kzalloc(sizeof(*col_map) * nr_ites, GFP_KERNEL); 202093f94ea0SMarc Zyngier nr_lpis = 0; 202193f94ea0SMarc Zyngier lpi_base = 0; 202293f94ea0SMarc Zyngier } 202384a6a2e7SMarc Zyngier 202493f94ea0SMarc Zyngier if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { 202584a6a2e7SMarc Zyngier kfree(dev); 202684a6a2e7SMarc Zyngier kfree(itt); 202784a6a2e7SMarc Zyngier kfree(lpi_map); 2028591e5becSMarc Zyngier kfree(col_map); 202984a6a2e7SMarc Zyngier return NULL; 203084a6a2e7SMarc Zyngier } 203184a6a2e7SMarc Zyngier 2032328191c0SVladimir Murzin gic_flush_dcache_to_poc(itt, sz); 20335a9a8915SMarc Zyngier 203484a6a2e7SMarc Zyngier dev->its = its; 203584a6a2e7SMarc Zyngier dev->itt = itt; 2036c8481267SMarc Zyngier dev->nr_ites = nr_ites; 2037591e5becSMarc Zyngier dev->event_map.lpi_map = lpi_map; 2038591e5becSMarc Zyngier dev->event_map.col_map = col_map; 2039591e5becSMarc Zyngier dev->event_map.lpi_base = lpi_base; 2040591e5becSMarc Zyngier dev->event_map.nr_lpis = nr_lpis; 2041d011e4e6SMarc Zyngier mutex_init(&dev->event_map.vlpi_lock); 204284a6a2e7SMarc Zyngier dev->device_id = dev_id; 204384a6a2e7SMarc Zyngier INIT_LIST_HEAD(&dev->entry); 204484a6a2e7SMarc Zyngier 20453e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its->lock, flags); 204684a6a2e7SMarc Zyngier list_add(&dev->entry, &its->its_device_list); 20473e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its->lock, flags); 204884a6a2e7SMarc Zyngier 204984a6a2e7SMarc Zyngier /* Map device to its ITT */ 205084a6a2e7SMarc Zyngier its_send_mapd(dev, 1); 205184a6a2e7SMarc Zyngier 205284a6a2e7SMarc Zyngier return dev; 205384a6a2e7SMarc Zyngier } 205484a6a2e7SMarc Zyngier 205584a6a2e7SMarc Zyngier static void its_free_device(struct its_device *its_dev) 205684a6a2e7SMarc Zyngier { 20573e39e8f5SMarc Zyngier unsigned long flags; 20583e39e8f5SMarc Zyngier 20593e39e8f5SMarc Zyngier raw_spin_lock_irqsave(&its_dev->its->lock, flags); 206084a6a2e7SMarc Zyngier list_del(&its_dev->entry); 20613e39e8f5SMarc Zyngier raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); 206284a6a2e7SMarc Zyngier kfree(its_dev->itt); 206384a6a2e7SMarc Zyngier kfree(its_dev); 206484a6a2e7SMarc Zyngier } 2065b48ac83dSMarc Zyngier 2066b48ac83dSMarc Zyngier static int its_alloc_device_irq(struct its_device *dev, irq_hw_number_t *hwirq) 2067b48ac83dSMarc Zyngier { 2068b48ac83dSMarc Zyngier int idx; 2069b48ac83dSMarc Zyngier 2070591e5becSMarc Zyngier idx = find_first_zero_bit(dev->event_map.lpi_map, 2071591e5becSMarc Zyngier dev->event_map.nr_lpis); 2072591e5becSMarc Zyngier if (idx == dev->event_map.nr_lpis) 2073b48ac83dSMarc Zyngier return -ENOSPC; 2074b48ac83dSMarc Zyngier 2075591e5becSMarc Zyngier *hwirq = dev->event_map.lpi_base + idx; 2076591e5becSMarc Zyngier set_bit(idx, dev->event_map.lpi_map); 2077b48ac83dSMarc Zyngier 2078b48ac83dSMarc Zyngier return 0; 2079b48ac83dSMarc Zyngier } 2080b48ac83dSMarc Zyngier 208154456db9SMarc Zyngier static int its_msi_prepare(struct irq_domain *domain, struct device *dev, 2082b48ac83dSMarc Zyngier int nvec, msi_alloc_info_t *info) 2083b48ac83dSMarc Zyngier { 2084b48ac83dSMarc Zyngier struct its_node *its; 2085b48ac83dSMarc Zyngier struct its_device *its_dev; 208654456db9SMarc Zyngier struct msi_domain_info *msi_info; 208754456db9SMarc Zyngier u32 dev_id; 2088b48ac83dSMarc Zyngier 208954456db9SMarc Zyngier /* 209054456db9SMarc Zyngier * We ignore "dev" entierely, and rely on the dev_id that has 209154456db9SMarc Zyngier * been passed via the scratchpad. This limits this domain's 209254456db9SMarc Zyngier * usefulness to upper layers that definitely know that they 209354456db9SMarc Zyngier * are built on top of the ITS. 209454456db9SMarc Zyngier */ 209554456db9SMarc Zyngier dev_id = info->scratchpad[0].ul; 209654456db9SMarc Zyngier 209754456db9SMarc Zyngier msi_info = msi_get_domain_info(domain); 209854456db9SMarc Zyngier its = msi_info->data; 209954456db9SMarc Zyngier 210020b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi && 210120b3d54eSMarc Zyngier vpe_proxy.dev && 210220b3d54eSMarc Zyngier vpe_proxy.dev->its == its && 210320b3d54eSMarc Zyngier dev_id == vpe_proxy.dev->device_id) { 210420b3d54eSMarc Zyngier /* Bad luck. Get yourself a better implementation */ 210520b3d54eSMarc Zyngier WARN_ONCE(1, "DevId %x clashes with GICv4 VPE proxy device\n", 210620b3d54eSMarc Zyngier dev_id); 210720b3d54eSMarc Zyngier return -EINVAL; 210820b3d54eSMarc Zyngier } 210920b3d54eSMarc Zyngier 2110f130420eSMarc Zyngier its_dev = its_find_device(its, dev_id); 2111e8137f4fSMarc Zyngier if (its_dev) { 2112e8137f4fSMarc Zyngier /* 2113e8137f4fSMarc Zyngier * We already have seen this ID, probably through 2114e8137f4fSMarc Zyngier * another alias (PCI bridge of some sort). No need to 2115e8137f4fSMarc Zyngier * create the device. 2116e8137f4fSMarc Zyngier */ 2117f130420eSMarc Zyngier pr_debug("Reusing ITT for devID %x\n", dev_id); 2118e8137f4fSMarc Zyngier goto out; 2119e8137f4fSMarc Zyngier } 2120b48ac83dSMarc Zyngier 212193f94ea0SMarc Zyngier its_dev = its_create_device(its, dev_id, nvec, true); 2122b48ac83dSMarc Zyngier if (!its_dev) 2123b48ac83dSMarc Zyngier return -ENOMEM; 2124b48ac83dSMarc Zyngier 2125f130420eSMarc Zyngier pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); 2126e8137f4fSMarc Zyngier out: 2127b48ac83dSMarc Zyngier info->scratchpad[0].ptr = its_dev; 2128b48ac83dSMarc Zyngier return 0; 2129b48ac83dSMarc Zyngier } 2130b48ac83dSMarc Zyngier 213154456db9SMarc Zyngier static struct msi_domain_ops its_msi_domain_ops = { 213254456db9SMarc Zyngier .msi_prepare = its_msi_prepare, 213354456db9SMarc Zyngier }; 213454456db9SMarc Zyngier 2135b48ac83dSMarc Zyngier static int its_irq_gic_domain_alloc(struct irq_domain *domain, 2136b48ac83dSMarc Zyngier unsigned int virq, 2137b48ac83dSMarc Zyngier irq_hw_number_t hwirq) 2138b48ac83dSMarc Zyngier { 2139f833f57fSMarc Zyngier struct irq_fwspec fwspec; 2140b48ac83dSMarc Zyngier 2141f833f57fSMarc Zyngier if (irq_domain_get_of_node(domain->parent)) { 2142f833f57fSMarc Zyngier fwspec.fwnode = domain->parent->fwnode; 2143f833f57fSMarc Zyngier fwspec.param_count = 3; 2144f833f57fSMarc Zyngier fwspec.param[0] = GIC_IRQ_TYPE_LPI; 2145f833f57fSMarc Zyngier fwspec.param[1] = hwirq; 2146f833f57fSMarc Zyngier fwspec.param[2] = IRQ_TYPE_EDGE_RISING; 21473f010cf1STomasz Nowicki } else if (is_fwnode_irqchip(domain->parent->fwnode)) { 21483f010cf1STomasz Nowicki fwspec.fwnode = domain->parent->fwnode; 21493f010cf1STomasz Nowicki fwspec.param_count = 2; 21503f010cf1STomasz Nowicki fwspec.param[0] = hwirq; 21513f010cf1STomasz Nowicki fwspec.param[1] = IRQ_TYPE_EDGE_RISING; 2152f833f57fSMarc Zyngier } else { 2153f833f57fSMarc Zyngier return -EINVAL; 2154f833f57fSMarc Zyngier } 2155b48ac83dSMarc Zyngier 2156f833f57fSMarc Zyngier return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); 2157b48ac83dSMarc Zyngier } 2158b48ac83dSMarc Zyngier 2159b48ac83dSMarc Zyngier static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 2160b48ac83dSMarc Zyngier unsigned int nr_irqs, void *args) 2161b48ac83dSMarc Zyngier { 2162b48ac83dSMarc Zyngier msi_alloc_info_t *info = args; 2163b48ac83dSMarc Zyngier struct its_device *its_dev = info->scratchpad[0].ptr; 2164b48ac83dSMarc Zyngier irq_hw_number_t hwirq; 2165b48ac83dSMarc Zyngier int err; 2166b48ac83dSMarc Zyngier int i; 2167b48ac83dSMarc Zyngier 2168b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 2169b48ac83dSMarc Zyngier err = its_alloc_device_irq(its_dev, &hwirq); 2170b48ac83dSMarc Zyngier if (err) 2171b48ac83dSMarc Zyngier return err; 2172b48ac83dSMarc Zyngier 2173b48ac83dSMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, hwirq); 2174b48ac83dSMarc Zyngier if (err) 2175b48ac83dSMarc Zyngier return err; 2176b48ac83dSMarc Zyngier 2177b48ac83dSMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, 2178b48ac83dSMarc Zyngier hwirq, &its_irq_chip, its_dev); 2179f130420eSMarc Zyngier pr_debug("ID:%d pID:%d vID:%d\n", 2180591e5becSMarc Zyngier (int)(hwirq - its_dev->event_map.lpi_base), 2181591e5becSMarc Zyngier (int) hwirq, virq + i); 2182b48ac83dSMarc Zyngier } 2183b48ac83dSMarc Zyngier 2184b48ac83dSMarc Zyngier return 0; 2185b48ac83dSMarc Zyngier } 2186b48ac83dSMarc Zyngier 2187aca268dfSMarc Zyngier static void its_irq_domain_activate(struct irq_domain *domain, 2188aca268dfSMarc Zyngier struct irq_data *d) 2189aca268dfSMarc Zyngier { 2190aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2191aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2192fbf8f40eSGanapatrao Kulkarni const struct cpumask *cpu_mask = cpu_online_mask; 2193fbf8f40eSGanapatrao Kulkarni 2194fbf8f40eSGanapatrao Kulkarni /* get the cpu_mask of local node */ 2195fbf8f40eSGanapatrao Kulkarni if (its_dev->its->numa_node >= 0) 2196fbf8f40eSGanapatrao Kulkarni cpu_mask = cpumask_of_node(its_dev->its->numa_node); 2197aca268dfSMarc Zyngier 2198591e5becSMarc Zyngier /* Bind the LPI to the first possible CPU */ 2199fbf8f40eSGanapatrao Kulkarni its_dev->event_map.col_map[event] = cpumask_first(cpu_mask); 2200591e5becSMarc Zyngier 2201aca268dfSMarc Zyngier /* Map the GIC IRQ and event to the device */ 22026a25ad3aSMarc Zyngier its_send_mapti(its_dev, d->hwirq, event); 2203aca268dfSMarc Zyngier } 2204aca268dfSMarc Zyngier 2205aca268dfSMarc Zyngier static void its_irq_domain_deactivate(struct irq_domain *domain, 2206aca268dfSMarc Zyngier struct irq_data *d) 2207aca268dfSMarc Zyngier { 2208aca268dfSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2209aca268dfSMarc Zyngier u32 event = its_get_event_id(d); 2210aca268dfSMarc Zyngier 2211aca268dfSMarc Zyngier /* Stop the delivery of interrupts */ 2212aca268dfSMarc Zyngier its_send_discard(its_dev, event); 2213aca268dfSMarc Zyngier } 2214aca268dfSMarc Zyngier 2215b48ac83dSMarc Zyngier static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, 2216b48ac83dSMarc Zyngier unsigned int nr_irqs) 2217b48ac83dSMarc Zyngier { 2218b48ac83dSMarc Zyngier struct irq_data *d = irq_domain_get_irq_data(domain, virq); 2219b48ac83dSMarc Zyngier struct its_device *its_dev = irq_data_get_irq_chip_data(d); 2220b48ac83dSMarc Zyngier int i; 2221b48ac83dSMarc Zyngier 2222b48ac83dSMarc Zyngier for (i = 0; i < nr_irqs; i++) { 2223b48ac83dSMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 2224b48ac83dSMarc Zyngier virq + i); 2225aca268dfSMarc Zyngier u32 event = its_get_event_id(data); 2226b48ac83dSMarc Zyngier 2227b48ac83dSMarc Zyngier /* Mark interrupt index as unused */ 2228591e5becSMarc Zyngier clear_bit(event, its_dev->event_map.lpi_map); 2229b48ac83dSMarc Zyngier 2230b48ac83dSMarc Zyngier /* Nuke the entry in the domain */ 22312da39949SMarc Zyngier irq_domain_reset_irq_data(data); 2232b48ac83dSMarc Zyngier } 2233b48ac83dSMarc Zyngier 2234b48ac83dSMarc Zyngier /* If all interrupts have been freed, start mopping the floor */ 2235591e5becSMarc Zyngier if (bitmap_empty(its_dev->event_map.lpi_map, 2236591e5becSMarc Zyngier its_dev->event_map.nr_lpis)) { 2237cf2be8baSMarc Zyngier its_lpi_free_chunks(its_dev->event_map.lpi_map, 2238cf2be8baSMarc Zyngier its_dev->event_map.lpi_base, 2239cf2be8baSMarc Zyngier its_dev->event_map.nr_lpis); 2240cf2be8baSMarc Zyngier kfree(its_dev->event_map.col_map); 2241b48ac83dSMarc Zyngier 2242b48ac83dSMarc Zyngier /* Unmap device/itt */ 2243b48ac83dSMarc Zyngier its_send_mapd(its_dev, 0); 2244b48ac83dSMarc Zyngier its_free_device(its_dev); 2245b48ac83dSMarc Zyngier } 2246b48ac83dSMarc Zyngier 2247b48ac83dSMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 2248b48ac83dSMarc Zyngier } 2249b48ac83dSMarc Zyngier 2250b48ac83dSMarc Zyngier static const struct irq_domain_ops its_domain_ops = { 2251b48ac83dSMarc Zyngier .alloc = its_irq_domain_alloc, 2252b48ac83dSMarc Zyngier .free = its_irq_domain_free, 2253aca268dfSMarc Zyngier .activate = its_irq_domain_activate, 2254aca268dfSMarc Zyngier .deactivate = its_irq_domain_deactivate, 2255b48ac83dSMarc Zyngier }; 22564c21f3c2SMarc Zyngier 225720b3d54eSMarc Zyngier /* 225820b3d54eSMarc Zyngier * This is insane. 225920b3d54eSMarc Zyngier * 226020b3d54eSMarc Zyngier * If a GICv4 doesn't implement Direct LPIs (which is extremely 226120b3d54eSMarc Zyngier * likely), the only way to perform an invalidate is to use a fake 226220b3d54eSMarc Zyngier * device to issue an INV command, implying that the LPI has first 226320b3d54eSMarc Zyngier * been mapped to some event on that device. Since this is not exactly 226420b3d54eSMarc Zyngier * cheap, we try to keep that mapping around as long as possible, and 226520b3d54eSMarc Zyngier * only issue an UNMAP if we're short on available slots. 226620b3d54eSMarc Zyngier * 226720b3d54eSMarc Zyngier * Broken by design(tm). 226820b3d54eSMarc Zyngier */ 226920b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap_locked(struct its_vpe *vpe) 227020b3d54eSMarc Zyngier { 227120b3d54eSMarc Zyngier /* Already unmapped? */ 227220b3d54eSMarc Zyngier if (vpe->vpe_proxy_event == -1) 227320b3d54eSMarc Zyngier return; 227420b3d54eSMarc Zyngier 227520b3d54eSMarc Zyngier its_send_discard(vpe_proxy.dev, vpe->vpe_proxy_event); 227620b3d54eSMarc Zyngier vpe_proxy.vpes[vpe->vpe_proxy_event] = NULL; 227720b3d54eSMarc Zyngier 227820b3d54eSMarc Zyngier /* 227920b3d54eSMarc Zyngier * We don't track empty slots at all, so let's move the 228020b3d54eSMarc Zyngier * next_victim pointer if we can quickly reuse that slot 228120b3d54eSMarc Zyngier * instead of nuking an existing entry. Not clear that this is 228220b3d54eSMarc Zyngier * always a win though, and this might just generate a ripple 228320b3d54eSMarc Zyngier * effect... Let's just hope VPEs don't migrate too often. 228420b3d54eSMarc Zyngier */ 228520b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 228620b3d54eSMarc Zyngier vpe_proxy.next_victim = vpe->vpe_proxy_event; 228720b3d54eSMarc Zyngier 228820b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 228920b3d54eSMarc Zyngier } 229020b3d54eSMarc Zyngier 229120b3d54eSMarc Zyngier static void its_vpe_db_proxy_unmap(struct its_vpe *vpe) 229220b3d54eSMarc Zyngier { 229320b3d54eSMarc Zyngier if (!gic_rdists->has_direct_lpi) { 229420b3d54eSMarc Zyngier unsigned long flags; 229520b3d54eSMarc Zyngier 229620b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 229720b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe); 229820b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 229920b3d54eSMarc Zyngier } 230020b3d54eSMarc Zyngier } 230120b3d54eSMarc Zyngier 230220b3d54eSMarc Zyngier static void its_vpe_db_proxy_map_locked(struct its_vpe *vpe) 230320b3d54eSMarc Zyngier { 230420b3d54eSMarc Zyngier /* Already mapped? */ 230520b3d54eSMarc Zyngier if (vpe->vpe_proxy_event != -1) 230620b3d54eSMarc Zyngier return; 230720b3d54eSMarc Zyngier 230820b3d54eSMarc Zyngier /* This slot was already allocated. Kick the other VPE out. */ 230920b3d54eSMarc Zyngier if (vpe_proxy.vpes[vpe_proxy.next_victim]) 231020b3d54eSMarc Zyngier its_vpe_db_proxy_unmap_locked(vpe_proxy.vpes[vpe_proxy.next_victim]); 231120b3d54eSMarc Zyngier 231220b3d54eSMarc Zyngier /* Map the new VPE instead */ 231320b3d54eSMarc Zyngier vpe_proxy.vpes[vpe_proxy.next_victim] = vpe; 231420b3d54eSMarc Zyngier vpe->vpe_proxy_event = vpe_proxy.next_victim; 231520b3d54eSMarc Zyngier vpe_proxy.next_victim = (vpe_proxy.next_victim + 1) % vpe_proxy.dev->nr_ites; 231620b3d54eSMarc Zyngier 231720b3d54eSMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = vpe->col_idx; 231820b3d54eSMarc Zyngier its_send_mapti(vpe_proxy.dev, vpe->vpe_db_lpi, vpe->vpe_proxy_event); 231920b3d54eSMarc Zyngier } 232020b3d54eSMarc Zyngier 2321958b90d1SMarc Zyngier static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) 2322958b90d1SMarc Zyngier { 2323958b90d1SMarc Zyngier unsigned long flags; 2324958b90d1SMarc Zyngier struct its_collection *target_col; 2325958b90d1SMarc Zyngier 2326958b90d1SMarc Zyngier if (gic_rdists->has_direct_lpi) { 2327958b90d1SMarc Zyngier void __iomem *rdbase; 2328958b90d1SMarc Zyngier 2329958b90d1SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; 2330958b90d1SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); 2331958b90d1SMarc Zyngier while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) 2332958b90d1SMarc Zyngier cpu_relax(); 2333958b90d1SMarc Zyngier 2334958b90d1SMarc Zyngier return; 2335958b90d1SMarc Zyngier } 2336958b90d1SMarc Zyngier 2337958b90d1SMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 2338958b90d1SMarc Zyngier 2339958b90d1SMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 2340958b90d1SMarc Zyngier 2341958b90d1SMarc Zyngier target_col = &vpe_proxy.dev->its->collections[to]; 2342958b90d1SMarc Zyngier its_send_movi(vpe_proxy.dev, target_col, vpe->vpe_proxy_event); 2343958b90d1SMarc Zyngier vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = to; 2344958b90d1SMarc Zyngier 2345958b90d1SMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 2346958b90d1SMarc Zyngier } 2347958b90d1SMarc Zyngier 23483171a47aSMarc Zyngier static int its_vpe_set_affinity(struct irq_data *d, 23493171a47aSMarc Zyngier const struct cpumask *mask_val, 23503171a47aSMarc Zyngier bool force) 23513171a47aSMarc Zyngier { 23523171a47aSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 23533171a47aSMarc Zyngier int cpu = cpumask_first(mask_val); 23543171a47aSMarc Zyngier 23553171a47aSMarc Zyngier /* 23563171a47aSMarc Zyngier * Changing affinity is mega expensive, so let's be as lazy as 235720b3d54eSMarc Zyngier * we can and only do it if we really have to. Also, if mapped 2358958b90d1SMarc Zyngier * into the proxy device, we need to move the doorbell 2359958b90d1SMarc Zyngier * interrupt to its new location. 23603171a47aSMarc Zyngier */ 23613171a47aSMarc Zyngier if (vpe->col_idx != cpu) { 2362958b90d1SMarc Zyngier int from = vpe->col_idx; 2363958b90d1SMarc Zyngier 23643171a47aSMarc Zyngier vpe->col_idx = cpu; 23653171a47aSMarc Zyngier its_send_vmovp(vpe); 2366958b90d1SMarc Zyngier its_vpe_db_proxy_move(vpe, from, cpu); 23673171a47aSMarc Zyngier } 23683171a47aSMarc Zyngier 23693171a47aSMarc Zyngier return IRQ_SET_MASK_OK_DONE; 23703171a47aSMarc Zyngier } 23713171a47aSMarc Zyngier 2372e643d803SMarc Zyngier static void its_vpe_schedule(struct its_vpe *vpe) 2373e643d803SMarc Zyngier { 2374e643d803SMarc Zyngier void * __iomem vlpi_base = gic_data_rdist_vlpi_base(); 2375e643d803SMarc Zyngier u64 val; 2376e643d803SMarc Zyngier 2377e643d803SMarc Zyngier /* Schedule the VPE */ 2378e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & 2379e643d803SMarc Zyngier GENMASK_ULL(51, 12); 2380e643d803SMarc Zyngier val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; 2381e643d803SMarc Zyngier val |= GICR_VPROPBASER_RaWb; 2382e643d803SMarc Zyngier val |= GICR_VPROPBASER_InnerShareable; 2383e643d803SMarc Zyngier gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); 2384e643d803SMarc Zyngier 2385e643d803SMarc Zyngier val = virt_to_phys(page_address(vpe->vpt_page)) & 2386e643d803SMarc Zyngier GENMASK_ULL(51, 16); 2387e643d803SMarc Zyngier val |= GICR_VPENDBASER_RaWaWb; 2388e643d803SMarc Zyngier val |= GICR_VPENDBASER_NonShareable; 2389e643d803SMarc Zyngier /* 2390e643d803SMarc Zyngier * There is no good way of finding out if the pending table is 2391e643d803SMarc Zyngier * empty as we can race against the doorbell interrupt very 2392e643d803SMarc Zyngier * easily. So in the end, vpe->pending_last is only an 2393e643d803SMarc Zyngier * indication that the vcpu has something pending, not one 2394e643d803SMarc Zyngier * that the pending table is empty. A good implementation 2395e643d803SMarc Zyngier * would be able to read its coarse map pretty quickly anyway, 2396e643d803SMarc Zyngier * making this a tolerable issue. 2397e643d803SMarc Zyngier */ 2398e643d803SMarc Zyngier val |= GICR_VPENDBASER_PendingLast; 2399e643d803SMarc Zyngier val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; 2400e643d803SMarc Zyngier val |= GICR_VPENDBASER_Valid; 2401e643d803SMarc Zyngier gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 2402e643d803SMarc Zyngier } 2403e643d803SMarc Zyngier 2404e643d803SMarc Zyngier static void its_vpe_deschedule(struct its_vpe *vpe) 2405e643d803SMarc Zyngier { 2406e643d803SMarc Zyngier void * __iomem vlpi_base = gic_data_rdist_vlpi_base(); 2407e643d803SMarc Zyngier u32 count = 1000000; /* 1s! */ 2408e643d803SMarc Zyngier bool clean; 2409e643d803SMarc Zyngier u64 val; 2410e643d803SMarc Zyngier 2411e643d803SMarc Zyngier /* We're being scheduled out */ 2412e643d803SMarc Zyngier val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 2413e643d803SMarc Zyngier val &= ~GICR_VPENDBASER_Valid; 2414e643d803SMarc Zyngier gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); 2415e643d803SMarc Zyngier 2416e643d803SMarc Zyngier do { 2417e643d803SMarc Zyngier val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); 2418e643d803SMarc Zyngier clean = !(val & GICR_VPENDBASER_Dirty); 2419e643d803SMarc Zyngier if (!clean) { 2420e643d803SMarc Zyngier count--; 2421e643d803SMarc Zyngier cpu_relax(); 2422e643d803SMarc Zyngier udelay(1); 2423e643d803SMarc Zyngier } 2424e643d803SMarc Zyngier } while (!clean && count); 2425e643d803SMarc Zyngier 2426e643d803SMarc Zyngier if (unlikely(!clean && !count)) { 2427e643d803SMarc Zyngier pr_err_ratelimited("ITS virtual pending table not cleaning\n"); 2428e643d803SMarc Zyngier vpe->idai = false; 2429e643d803SMarc Zyngier vpe->pending_last = true; 2430e643d803SMarc Zyngier } else { 2431e643d803SMarc Zyngier vpe->idai = !!(val & GICR_VPENDBASER_IDAI); 2432e643d803SMarc Zyngier vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); 2433e643d803SMarc Zyngier } 2434e643d803SMarc Zyngier } 2435e643d803SMarc Zyngier 2436e643d803SMarc Zyngier static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) 2437e643d803SMarc Zyngier { 2438e643d803SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2439e643d803SMarc Zyngier struct its_cmd_info *info = vcpu_info; 2440e643d803SMarc Zyngier 2441e643d803SMarc Zyngier switch (info->cmd_type) { 2442e643d803SMarc Zyngier case SCHEDULE_VPE: 2443e643d803SMarc Zyngier its_vpe_schedule(vpe); 2444e643d803SMarc Zyngier return 0; 2445e643d803SMarc Zyngier 2446e643d803SMarc Zyngier case DESCHEDULE_VPE: 2447e643d803SMarc Zyngier its_vpe_deschedule(vpe); 2448e643d803SMarc Zyngier return 0; 2449e643d803SMarc Zyngier 24505e2f7642SMarc Zyngier case INVALL_VPE: 24515e2f7642SMarc Zyngier its_send_vinvall(vpe); 24525e2f7642SMarc Zyngier return 0; 24535e2f7642SMarc Zyngier 2454e643d803SMarc Zyngier default: 2455e643d803SMarc Zyngier return -EINVAL; 2456e643d803SMarc Zyngier } 2457e643d803SMarc Zyngier } 2458e643d803SMarc Zyngier 245920b3d54eSMarc Zyngier static void its_vpe_send_cmd(struct its_vpe *vpe, 246020b3d54eSMarc Zyngier void (*cmd)(struct its_device *, u32)) 246120b3d54eSMarc Zyngier { 246220b3d54eSMarc Zyngier unsigned long flags; 246320b3d54eSMarc Zyngier 246420b3d54eSMarc Zyngier raw_spin_lock_irqsave(&vpe_proxy.lock, flags); 246520b3d54eSMarc Zyngier 246620b3d54eSMarc Zyngier its_vpe_db_proxy_map_locked(vpe); 246720b3d54eSMarc Zyngier cmd(vpe_proxy.dev, vpe->vpe_proxy_event); 246820b3d54eSMarc Zyngier 246920b3d54eSMarc Zyngier raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); 247020b3d54eSMarc Zyngier } 247120b3d54eSMarc Zyngier 2472f6a91da7SMarc Zyngier static void its_vpe_send_inv(struct irq_data *d) 2473f6a91da7SMarc Zyngier { 2474f6a91da7SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 247520b3d54eSMarc Zyngier 247620b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 2477f6a91da7SMarc Zyngier void __iomem *rdbase; 2478f6a91da7SMarc Zyngier 2479f6a91da7SMarc Zyngier rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; 2480f6a91da7SMarc Zyngier gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR); 2481f6a91da7SMarc Zyngier while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) 2482f6a91da7SMarc Zyngier cpu_relax(); 248320b3d54eSMarc Zyngier } else { 248420b3d54eSMarc Zyngier its_vpe_send_cmd(vpe, its_send_inv); 248520b3d54eSMarc Zyngier } 2486f6a91da7SMarc Zyngier } 2487f6a91da7SMarc Zyngier 2488f6a91da7SMarc Zyngier static void its_vpe_mask_irq(struct irq_data *d) 2489f6a91da7SMarc Zyngier { 2490f6a91da7SMarc Zyngier /* 2491f6a91da7SMarc Zyngier * We need to unmask the LPI, which is described by the parent 2492f6a91da7SMarc Zyngier * irq_data. Instead of calling into the parent (which won't 2493f6a91da7SMarc Zyngier * exactly do the right thing, let's simply use the 2494f6a91da7SMarc Zyngier * parent_data pointer. Yes, I'm naughty. 2495f6a91da7SMarc Zyngier */ 2496f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); 2497f6a91da7SMarc Zyngier its_vpe_send_inv(d); 2498f6a91da7SMarc Zyngier } 2499f6a91da7SMarc Zyngier 2500f6a91da7SMarc Zyngier static void its_vpe_unmask_irq(struct irq_data *d) 2501f6a91da7SMarc Zyngier { 2502f6a91da7SMarc Zyngier /* Same hack as above... */ 2503f6a91da7SMarc Zyngier lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); 2504f6a91da7SMarc Zyngier its_vpe_send_inv(d); 2505f6a91da7SMarc Zyngier } 2506f6a91da7SMarc Zyngier 25078fff27aeSMarc Zyngier static struct irq_chip its_vpe_irq_chip = { 25088fff27aeSMarc Zyngier .name = "GICv4-vpe", 2509f6a91da7SMarc Zyngier .irq_mask = its_vpe_mask_irq, 2510f6a91da7SMarc Zyngier .irq_unmask = its_vpe_unmask_irq, 2511f6a91da7SMarc Zyngier .irq_eoi = irq_chip_eoi_parent, 25123171a47aSMarc Zyngier .irq_set_affinity = its_vpe_set_affinity, 2513e643d803SMarc Zyngier .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, 25148fff27aeSMarc Zyngier }; 25158fff27aeSMarc Zyngier 25167d75bbb4SMarc Zyngier static int its_vpe_id_alloc(void) 25177d75bbb4SMarc Zyngier { 25187d75bbb4SMarc Zyngier return ida_simple_get(&its_vpeid_ida, 0, 1 << 16, GFP_KERNEL); 25197d75bbb4SMarc Zyngier } 25207d75bbb4SMarc Zyngier 25217d75bbb4SMarc Zyngier static void its_vpe_id_free(u16 id) 25227d75bbb4SMarc Zyngier { 25237d75bbb4SMarc Zyngier ida_simple_remove(&its_vpeid_ida, id); 25247d75bbb4SMarc Zyngier } 25257d75bbb4SMarc Zyngier 25267d75bbb4SMarc Zyngier static int its_vpe_init(struct its_vpe *vpe) 25277d75bbb4SMarc Zyngier { 25287d75bbb4SMarc Zyngier struct page *vpt_page; 25297d75bbb4SMarc Zyngier int vpe_id; 25307d75bbb4SMarc Zyngier 25317d75bbb4SMarc Zyngier /* Allocate vpe_id */ 25327d75bbb4SMarc Zyngier vpe_id = its_vpe_id_alloc(); 25337d75bbb4SMarc Zyngier if (vpe_id < 0) 25347d75bbb4SMarc Zyngier return vpe_id; 25357d75bbb4SMarc Zyngier 25367d75bbb4SMarc Zyngier /* Allocate VPT */ 25377d75bbb4SMarc Zyngier vpt_page = its_allocate_pending_table(GFP_KERNEL); 25387d75bbb4SMarc Zyngier if (!vpt_page) { 25397d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 25407d75bbb4SMarc Zyngier return -ENOMEM; 25417d75bbb4SMarc Zyngier } 25427d75bbb4SMarc Zyngier 25437d75bbb4SMarc Zyngier if (!its_alloc_vpe_table(vpe_id)) { 25447d75bbb4SMarc Zyngier its_vpe_id_free(vpe_id); 25457d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 25467d75bbb4SMarc Zyngier return -ENOMEM; 25477d75bbb4SMarc Zyngier } 25487d75bbb4SMarc Zyngier 25497d75bbb4SMarc Zyngier vpe->vpe_id = vpe_id; 25507d75bbb4SMarc Zyngier vpe->vpt_page = vpt_page; 255120b3d54eSMarc Zyngier vpe->vpe_proxy_event = -1; 25527d75bbb4SMarc Zyngier 25537d75bbb4SMarc Zyngier return 0; 25547d75bbb4SMarc Zyngier } 25557d75bbb4SMarc Zyngier 25567d75bbb4SMarc Zyngier static void its_vpe_teardown(struct its_vpe *vpe) 25577d75bbb4SMarc Zyngier { 255820b3d54eSMarc Zyngier its_vpe_db_proxy_unmap(vpe); 25597d75bbb4SMarc Zyngier its_vpe_id_free(vpe->vpe_id); 25607d75bbb4SMarc Zyngier its_free_pending_table(vpe->vpt_page); 25617d75bbb4SMarc Zyngier } 25627d75bbb4SMarc Zyngier 25637d75bbb4SMarc Zyngier static void its_vpe_irq_domain_free(struct irq_domain *domain, 25647d75bbb4SMarc Zyngier unsigned int virq, 25657d75bbb4SMarc Zyngier unsigned int nr_irqs) 25667d75bbb4SMarc Zyngier { 25677d75bbb4SMarc Zyngier struct its_vm *vm = domain->host_data; 25687d75bbb4SMarc Zyngier int i; 25697d75bbb4SMarc Zyngier 25707d75bbb4SMarc Zyngier irq_domain_free_irqs_parent(domain, virq, nr_irqs); 25717d75bbb4SMarc Zyngier 25727d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 25737d75bbb4SMarc Zyngier struct irq_data *data = irq_domain_get_irq_data(domain, 25747d75bbb4SMarc Zyngier virq + i); 25757d75bbb4SMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(data); 25767d75bbb4SMarc Zyngier 25777d75bbb4SMarc Zyngier BUG_ON(vm != vpe->its_vm); 25787d75bbb4SMarc Zyngier 25797d75bbb4SMarc Zyngier clear_bit(data->hwirq, vm->db_bitmap); 25807d75bbb4SMarc Zyngier its_vpe_teardown(vpe); 25817d75bbb4SMarc Zyngier irq_domain_reset_irq_data(data); 25827d75bbb4SMarc Zyngier } 25837d75bbb4SMarc Zyngier 25847d75bbb4SMarc Zyngier if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { 25857d75bbb4SMarc Zyngier its_lpi_free_chunks(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); 25867d75bbb4SMarc Zyngier its_free_prop_table(vm->vprop_page); 25877d75bbb4SMarc Zyngier } 25887d75bbb4SMarc Zyngier } 25897d75bbb4SMarc Zyngier 25907d75bbb4SMarc Zyngier static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 25917d75bbb4SMarc Zyngier unsigned int nr_irqs, void *args) 25927d75bbb4SMarc Zyngier { 25937d75bbb4SMarc Zyngier struct its_vm *vm = args; 25947d75bbb4SMarc Zyngier unsigned long *bitmap; 25957d75bbb4SMarc Zyngier struct page *vprop_page; 25967d75bbb4SMarc Zyngier int base, nr_ids, i, err = 0; 25977d75bbb4SMarc Zyngier 25987d75bbb4SMarc Zyngier BUG_ON(!vm); 25997d75bbb4SMarc Zyngier 26007d75bbb4SMarc Zyngier bitmap = its_lpi_alloc_chunks(nr_irqs, &base, &nr_ids); 26017d75bbb4SMarc Zyngier if (!bitmap) 26027d75bbb4SMarc Zyngier return -ENOMEM; 26037d75bbb4SMarc Zyngier 26047d75bbb4SMarc Zyngier if (nr_ids < nr_irqs) { 26057d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 26067d75bbb4SMarc Zyngier return -ENOMEM; 26077d75bbb4SMarc Zyngier } 26087d75bbb4SMarc Zyngier 26097d75bbb4SMarc Zyngier vprop_page = its_allocate_prop_table(GFP_KERNEL); 26107d75bbb4SMarc Zyngier if (!vprop_page) { 26117d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 26127d75bbb4SMarc Zyngier return -ENOMEM; 26137d75bbb4SMarc Zyngier } 26147d75bbb4SMarc Zyngier 26157d75bbb4SMarc Zyngier vm->db_bitmap = bitmap; 26167d75bbb4SMarc Zyngier vm->db_lpi_base = base; 26177d75bbb4SMarc Zyngier vm->nr_db_lpis = nr_ids; 26187d75bbb4SMarc Zyngier vm->vprop_page = vprop_page; 26197d75bbb4SMarc Zyngier 26207d75bbb4SMarc Zyngier for (i = 0; i < nr_irqs; i++) { 26217d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi = base + i; 26227d75bbb4SMarc Zyngier err = its_vpe_init(vm->vpes[i]); 26237d75bbb4SMarc Zyngier if (err) 26247d75bbb4SMarc Zyngier break; 26257d75bbb4SMarc Zyngier err = its_irq_gic_domain_alloc(domain, virq + i, 26267d75bbb4SMarc Zyngier vm->vpes[i]->vpe_db_lpi); 26277d75bbb4SMarc Zyngier if (err) 26287d75bbb4SMarc Zyngier break; 26297d75bbb4SMarc Zyngier irq_domain_set_hwirq_and_chip(domain, virq + i, i, 26307d75bbb4SMarc Zyngier &its_vpe_irq_chip, vm->vpes[i]); 26317d75bbb4SMarc Zyngier set_bit(i, bitmap); 26327d75bbb4SMarc Zyngier } 26337d75bbb4SMarc Zyngier 26347d75bbb4SMarc Zyngier if (err) { 26357d75bbb4SMarc Zyngier if (i > 0) 26367d75bbb4SMarc Zyngier its_vpe_irq_domain_free(domain, virq, i - 1); 26377d75bbb4SMarc Zyngier 26387d75bbb4SMarc Zyngier its_lpi_free_chunks(bitmap, base, nr_ids); 26397d75bbb4SMarc Zyngier its_free_prop_table(vprop_page); 26407d75bbb4SMarc Zyngier } 26417d75bbb4SMarc Zyngier 26427d75bbb4SMarc Zyngier return err; 26437d75bbb4SMarc Zyngier } 26447d75bbb4SMarc Zyngier 2645eb78192bSMarc Zyngier static void its_vpe_irq_domain_activate(struct irq_domain *domain, 2646eb78192bSMarc Zyngier struct irq_data *d) 2647eb78192bSMarc Zyngier { 2648eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2649eb78192bSMarc Zyngier 2650eb78192bSMarc Zyngier /* Map the VPE to the first possible CPU */ 2651eb78192bSMarc Zyngier vpe->col_idx = cpumask_first(cpu_online_mask); 2652eb78192bSMarc Zyngier its_send_vmapp(vpe, true); 2653eb78192bSMarc Zyngier its_send_vinvall(vpe); 2654eb78192bSMarc Zyngier } 2655eb78192bSMarc Zyngier 2656eb78192bSMarc Zyngier static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, 2657eb78192bSMarc Zyngier struct irq_data *d) 2658eb78192bSMarc Zyngier { 2659eb78192bSMarc Zyngier struct its_vpe *vpe = irq_data_get_irq_chip_data(d); 2660eb78192bSMarc Zyngier 2661eb78192bSMarc Zyngier its_send_vmapp(vpe, false); 2662eb78192bSMarc Zyngier } 2663eb78192bSMarc Zyngier 26648fff27aeSMarc Zyngier static const struct irq_domain_ops its_vpe_domain_ops = { 26657d75bbb4SMarc Zyngier .alloc = its_vpe_irq_domain_alloc, 26667d75bbb4SMarc Zyngier .free = its_vpe_irq_domain_free, 2667eb78192bSMarc Zyngier .activate = its_vpe_irq_domain_activate, 2668eb78192bSMarc Zyngier .deactivate = its_vpe_irq_domain_deactivate, 26698fff27aeSMarc Zyngier }; 26708fff27aeSMarc Zyngier 26714559fbb3SYun Wu static int its_force_quiescent(void __iomem *base) 26724559fbb3SYun Wu { 26734559fbb3SYun Wu u32 count = 1000000; /* 1s */ 26744559fbb3SYun Wu u32 val; 26754559fbb3SYun Wu 26764559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 26777611da86SDavid Daney /* 26787611da86SDavid Daney * GIC architecture specification requires the ITS to be both 26797611da86SDavid Daney * disabled and quiescent for writes to GITS_BASER<n> or 26807611da86SDavid Daney * GITS_CBASER to not have UNPREDICTABLE results. 26817611da86SDavid Daney */ 26827611da86SDavid Daney if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) 26834559fbb3SYun Wu return 0; 26844559fbb3SYun Wu 26854559fbb3SYun Wu /* Disable the generation of all interrupts to this ITS */ 26864559fbb3SYun Wu val &= ~GITS_CTLR_ENABLE; 26874559fbb3SYun Wu writel_relaxed(val, base + GITS_CTLR); 26884559fbb3SYun Wu 26894559fbb3SYun Wu /* Poll GITS_CTLR and wait until ITS becomes quiescent */ 26904559fbb3SYun Wu while (1) { 26914559fbb3SYun Wu val = readl_relaxed(base + GITS_CTLR); 26924559fbb3SYun Wu if (val & GITS_CTLR_QUIESCENT) 26934559fbb3SYun Wu return 0; 26944559fbb3SYun Wu 26954559fbb3SYun Wu count--; 26964559fbb3SYun Wu if (!count) 26974559fbb3SYun Wu return -EBUSY; 26984559fbb3SYun Wu 26994559fbb3SYun Wu cpu_relax(); 27004559fbb3SYun Wu udelay(1); 27014559fbb3SYun Wu } 27024559fbb3SYun Wu } 27034559fbb3SYun Wu 270494100970SRobert Richter static void __maybe_unused its_enable_quirk_cavium_22375(void *data) 270594100970SRobert Richter { 270694100970SRobert Richter struct its_node *its = data; 270794100970SRobert Richter 270894100970SRobert Richter its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; 270994100970SRobert Richter } 271094100970SRobert Richter 2711fbf8f40eSGanapatrao Kulkarni static void __maybe_unused its_enable_quirk_cavium_23144(void *data) 2712fbf8f40eSGanapatrao Kulkarni { 2713fbf8f40eSGanapatrao Kulkarni struct its_node *its = data; 2714fbf8f40eSGanapatrao Kulkarni 2715fbf8f40eSGanapatrao Kulkarni its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; 2716fbf8f40eSGanapatrao Kulkarni } 2717fbf8f40eSGanapatrao Kulkarni 271890922a2dSShanker Donthineni static void __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) 271990922a2dSShanker Donthineni { 272090922a2dSShanker Donthineni struct its_node *its = data; 272190922a2dSShanker Donthineni 272290922a2dSShanker Donthineni /* On QDF2400, the size of the ITE is 16Bytes */ 272390922a2dSShanker Donthineni its->ite_size = 16; 272490922a2dSShanker Donthineni } 272590922a2dSShanker Donthineni 272667510ccaSRobert Richter static const struct gic_quirk its_quirks[] = { 272794100970SRobert Richter #ifdef CONFIG_CAVIUM_ERRATUM_22375 272894100970SRobert Richter { 272994100970SRobert Richter .desc = "ITS: Cavium errata 22375, 24313", 273094100970SRobert Richter .iidr = 0xa100034c, /* ThunderX pass 1.x */ 273194100970SRobert Richter .mask = 0xffff0fff, 273294100970SRobert Richter .init = its_enable_quirk_cavium_22375, 273394100970SRobert Richter }, 273494100970SRobert Richter #endif 2735fbf8f40eSGanapatrao Kulkarni #ifdef CONFIG_CAVIUM_ERRATUM_23144 2736fbf8f40eSGanapatrao Kulkarni { 2737fbf8f40eSGanapatrao Kulkarni .desc = "ITS: Cavium erratum 23144", 2738fbf8f40eSGanapatrao Kulkarni .iidr = 0xa100034c, /* ThunderX pass 1.x */ 2739fbf8f40eSGanapatrao Kulkarni .mask = 0xffff0fff, 2740fbf8f40eSGanapatrao Kulkarni .init = its_enable_quirk_cavium_23144, 2741fbf8f40eSGanapatrao Kulkarni }, 2742fbf8f40eSGanapatrao Kulkarni #endif 274390922a2dSShanker Donthineni #ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 274490922a2dSShanker Donthineni { 274590922a2dSShanker Donthineni .desc = "ITS: QDF2400 erratum 0065", 274690922a2dSShanker Donthineni .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ 274790922a2dSShanker Donthineni .mask = 0xffffffff, 274890922a2dSShanker Donthineni .init = its_enable_quirk_qdf2400_e0065, 274990922a2dSShanker Donthineni }, 275090922a2dSShanker Donthineni #endif 275167510ccaSRobert Richter { 275267510ccaSRobert Richter } 275367510ccaSRobert Richter }; 275467510ccaSRobert Richter 275567510ccaSRobert Richter static void its_enable_quirks(struct its_node *its) 275667510ccaSRobert Richter { 275767510ccaSRobert Richter u32 iidr = readl_relaxed(its->base + GITS_IIDR); 275867510ccaSRobert Richter 275967510ccaSRobert Richter gic_enable_quirks(iidr, its_quirks, its); 276067510ccaSRobert Richter } 276167510ccaSRobert Richter 2762db40f0a7STomasz Nowicki static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) 2763d14ae5e6STomasz Nowicki { 2764d14ae5e6STomasz Nowicki struct irq_domain *inner_domain; 2765d14ae5e6STomasz Nowicki struct msi_domain_info *info; 2766d14ae5e6STomasz Nowicki 2767d14ae5e6STomasz Nowicki info = kzalloc(sizeof(*info), GFP_KERNEL); 2768d14ae5e6STomasz Nowicki if (!info) 2769d14ae5e6STomasz Nowicki return -ENOMEM; 2770d14ae5e6STomasz Nowicki 2771db40f0a7STomasz Nowicki inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); 2772d14ae5e6STomasz Nowicki if (!inner_domain) { 2773d14ae5e6STomasz Nowicki kfree(info); 2774d14ae5e6STomasz Nowicki return -ENOMEM; 2775d14ae5e6STomasz Nowicki } 2776d14ae5e6STomasz Nowicki 2777db40f0a7STomasz Nowicki inner_domain->parent = its_parent; 277896f0d93aSMarc Zyngier irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); 277959768527SEric Auger inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_REMAP; 2780d14ae5e6STomasz Nowicki info->ops = &its_msi_domain_ops; 2781d14ae5e6STomasz Nowicki info->data = its; 2782d14ae5e6STomasz Nowicki inner_domain->host_data = info; 2783d14ae5e6STomasz Nowicki 2784d14ae5e6STomasz Nowicki return 0; 2785d14ae5e6STomasz Nowicki } 2786d14ae5e6STomasz Nowicki 27878fff27aeSMarc Zyngier static int its_init_vpe_domain(void) 27888fff27aeSMarc Zyngier { 278920b3d54eSMarc Zyngier struct its_node *its; 279020b3d54eSMarc Zyngier u32 devid; 279120b3d54eSMarc Zyngier int entries; 279220b3d54eSMarc Zyngier 279320b3d54eSMarc Zyngier if (gic_rdists->has_direct_lpi) { 279420b3d54eSMarc Zyngier pr_info("ITS: Using DirectLPI for VPE invalidation\n"); 279520b3d54eSMarc Zyngier return 0; 279620b3d54eSMarc Zyngier } 279720b3d54eSMarc Zyngier 279820b3d54eSMarc Zyngier /* Any ITS will do, even if not v4 */ 279920b3d54eSMarc Zyngier its = list_first_entry(&its_nodes, struct its_node, entry); 280020b3d54eSMarc Zyngier 280120b3d54eSMarc Zyngier entries = roundup_pow_of_two(nr_cpu_ids); 280220b3d54eSMarc Zyngier vpe_proxy.vpes = kzalloc(sizeof(*vpe_proxy.vpes) * entries, 280320b3d54eSMarc Zyngier GFP_KERNEL); 280420b3d54eSMarc Zyngier if (!vpe_proxy.vpes) { 280520b3d54eSMarc Zyngier pr_err("ITS: Can't allocate GICv4 proxy device array\n"); 280620b3d54eSMarc Zyngier return -ENOMEM; 280720b3d54eSMarc Zyngier } 280820b3d54eSMarc Zyngier 280920b3d54eSMarc Zyngier /* Use the last possible DevID */ 281020b3d54eSMarc Zyngier devid = GENMASK(its->device_ids - 1, 0); 281120b3d54eSMarc Zyngier vpe_proxy.dev = its_create_device(its, devid, entries, false); 281220b3d54eSMarc Zyngier if (!vpe_proxy.dev) { 281320b3d54eSMarc Zyngier kfree(vpe_proxy.vpes); 281420b3d54eSMarc Zyngier pr_err("ITS: Can't allocate GICv4 proxy device\n"); 281520b3d54eSMarc Zyngier return -ENOMEM; 281620b3d54eSMarc Zyngier } 281720b3d54eSMarc Zyngier 281820b3d54eSMarc Zyngier BUG_ON(entries != vpe_proxy.dev->nr_ites); 281920b3d54eSMarc Zyngier 282020b3d54eSMarc Zyngier raw_spin_lock_init(&vpe_proxy.lock); 282120b3d54eSMarc Zyngier vpe_proxy.next_victim = 0; 282220b3d54eSMarc Zyngier pr_info("ITS: Allocated DevID %x as GICv4 proxy device (%d slots)\n", 282320b3d54eSMarc Zyngier devid, vpe_proxy.dev->nr_ites); 282420b3d54eSMarc Zyngier 28258fff27aeSMarc Zyngier return 0; 28268fff27aeSMarc Zyngier } 28278fff27aeSMarc Zyngier 28283dfa576bSMarc Zyngier static int __init its_compute_its_list_map(struct resource *res, 28293dfa576bSMarc Zyngier void __iomem *its_base) 28303dfa576bSMarc Zyngier { 28313dfa576bSMarc Zyngier int its_number; 28323dfa576bSMarc Zyngier u32 ctlr; 28333dfa576bSMarc Zyngier 28343dfa576bSMarc Zyngier /* 28353dfa576bSMarc Zyngier * This is assumed to be done early enough that we're 28363dfa576bSMarc Zyngier * guaranteed to be single-threaded, hence no 28373dfa576bSMarc Zyngier * locking. Should this change, we should address 28383dfa576bSMarc Zyngier * this. 28393dfa576bSMarc Zyngier */ 28403dfa576bSMarc Zyngier its_number = find_first_zero_bit(&its_list_map, ITS_LIST_MAX); 28413dfa576bSMarc Zyngier if (its_number >= ITS_LIST_MAX) { 28423dfa576bSMarc Zyngier pr_err("ITS@%pa: No ITSList entry available!\n", 28433dfa576bSMarc Zyngier &res->start); 28443dfa576bSMarc Zyngier return -EINVAL; 28453dfa576bSMarc Zyngier } 28463dfa576bSMarc Zyngier 28473dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 28483dfa576bSMarc Zyngier ctlr &= ~GITS_CTLR_ITS_NUMBER; 28493dfa576bSMarc Zyngier ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; 28503dfa576bSMarc Zyngier writel_relaxed(ctlr, its_base + GITS_CTLR); 28513dfa576bSMarc Zyngier ctlr = readl_relaxed(its_base + GITS_CTLR); 28523dfa576bSMarc Zyngier if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { 28533dfa576bSMarc Zyngier its_number = ctlr & GITS_CTLR_ITS_NUMBER; 28543dfa576bSMarc Zyngier its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; 28553dfa576bSMarc Zyngier } 28563dfa576bSMarc Zyngier 28573dfa576bSMarc Zyngier if (test_and_set_bit(its_number, &its_list_map)) { 28583dfa576bSMarc Zyngier pr_err("ITS@%pa: Duplicate ITSList entry %d\n", 28593dfa576bSMarc Zyngier &res->start, its_number); 28603dfa576bSMarc Zyngier return -EINVAL; 28613dfa576bSMarc Zyngier } 28623dfa576bSMarc Zyngier 28633dfa576bSMarc Zyngier return its_number; 28643dfa576bSMarc Zyngier } 28653dfa576bSMarc Zyngier 2866db40f0a7STomasz Nowicki static int __init its_probe_one(struct resource *res, 2867db40f0a7STomasz Nowicki struct fwnode_handle *handle, int numa_node) 28684c21f3c2SMarc Zyngier { 28694c21f3c2SMarc Zyngier struct its_node *its; 28704c21f3c2SMarc Zyngier void __iomem *its_base; 28713dfa576bSMarc Zyngier u32 val, ctlr; 28723dfa576bSMarc Zyngier u64 baser, tmp, typer; 28734c21f3c2SMarc Zyngier int err; 28744c21f3c2SMarc Zyngier 2875db40f0a7STomasz Nowicki its_base = ioremap(res->start, resource_size(res)); 28764c21f3c2SMarc Zyngier if (!its_base) { 2877db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); 28784c21f3c2SMarc Zyngier return -ENOMEM; 28794c21f3c2SMarc Zyngier } 28804c21f3c2SMarc Zyngier 28814c21f3c2SMarc Zyngier val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; 28824c21f3c2SMarc Zyngier if (val != 0x30 && val != 0x40) { 2883db40f0a7STomasz Nowicki pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); 28844c21f3c2SMarc Zyngier err = -ENODEV; 28854c21f3c2SMarc Zyngier goto out_unmap; 28864c21f3c2SMarc Zyngier } 28874c21f3c2SMarc Zyngier 28884559fbb3SYun Wu err = its_force_quiescent(its_base); 28894559fbb3SYun Wu if (err) { 2890db40f0a7STomasz Nowicki pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); 28914559fbb3SYun Wu goto out_unmap; 28924559fbb3SYun Wu } 28934559fbb3SYun Wu 2894db40f0a7STomasz Nowicki pr_info("ITS %pR\n", res); 28954c21f3c2SMarc Zyngier 28964c21f3c2SMarc Zyngier its = kzalloc(sizeof(*its), GFP_KERNEL); 28974c21f3c2SMarc Zyngier if (!its) { 28984c21f3c2SMarc Zyngier err = -ENOMEM; 28994c21f3c2SMarc Zyngier goto out_unmap; 29004c21f3c2SMarc Zyngier } 29014c21f3c2SMarc Zyngier 29024c21f3c2SMarc Zyngier raw_spin_lock_init(&its->lock); 29034c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->entry); 29044c21f3c2SMarc Zyngier INIT_LIST_HEAD(&its->its_device_list); 29053dfa576bSMarc Zyngier typer = gic_read_typer(its_base + GITS_TYPER); 29064c21f3c2SMarc Zyngier its->base = its_base; 2907db40f0a7STomasz Nowicki its->phys_base = res->start; 29083dfa576bSMarc Zyngier its->ite_size = GITS_TYPER_ITT_ENTRY_SIZE(typer); 29093dfa576bSMarc Zyngier its->is_v4 = !!(typer & GITS_TYPER_VLPIS); 29103dfa576bSMarc Zyngier if (its->is_v4) { 29113dfa576bSMarc Zyngier if (!(typer & GITS_TYPER_VMOVP)) { 29123dfa576bSMarc Zyngier err = its_compute_its_list_map(res, its_base); 29133dfa576bSMarc Zyngier if (err < 0) 29143dfa576bSMarc Zyngier goto out_free_its; 29153dfa576bSMarc Zyngier 29163dfa576bSMarc Zyngier pr_info("ITS@%pa: Using ITS number %d\n", 29173dfa576bSMarc Zyngier &res->start, err); 29183dfa576bSMarc Zyngier } else { 29193dfa576bSMarc Zyngier pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); 29203dfa576bSMarc Zyngier } 29213dfa576bSMarc Zyngier } 29223dfa576bSMarc Zyngier 2923db40f0a7STomasz Nowicki its->numa_node = numa_node; 29244c21f3c2SMarc Zyngier 29255bc13c2cSRobert Richter its->cmd_base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 29265bc13c2cSRobert Richter get_order(ITS_CMD_QUEUE_SZ)); 29274c21f3c2SMarc Zyngier if (!its->cmd_base) { 29284c21f3c2SMarc Zyngier err = -ENOMEM; 29294c21f3c2SMarc Zyngier goto out_free_its; 29304c21f3c2SMarc Zyngier } 29314c21f3c2SMarc Zyngier its->cmd_write = its->cmd_base; 29324c21f3c2SMarc Zyngier 293367510ccaSRobert Richter its_enable_quirks(its); 293467510ccaSRobert Richter 29350e0b0f69SShanker Donthineni err = its_alloc_tables(its); 29364c21f3c2SMarc Zyngier if (err) 29374c21f3c2SMarc Zyngier goto out_free_cmd; 29384c21f3c2SMarc Zyngier 29394c21f3c2SMarc Zyngier err = its_alloc_collections(its); 29404c21f3c2SMarc Zyngier if (err) 29414c21f3c2SMarc Zyngier goto out_free_tables; 29424c21f3c2SMarc Zyngier 29434c21f3c2SMarc Zyngier baser = (virt_to_phys(its->cmd_base) | 29442fd632a0SShanker Donthineni GITS_CBASER_RaWaWb | 29454c21f3c2SMarc Zyngier GITS_CBASER_InnerShareable | 29464c21f3c2SMarc Zyngier (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | 29474c21f3c2SMarc Zyngier GITS_CBASER_VALID); 29484c21f3c2SMarc Zyngier 29490968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 29500968a619SVladimir Murzin tmp = gits_read_cbaser(its->base + GITS_CBASER); 29514c21f3c2SMarc Zyngier 29524ad3e363SMarc Zyngier if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { 2953241a386cSMarc Zyngier if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { 2954241a386cSMarc Zyngier /* 2955241a386cSMarc Zyngier * The HW reports non-shareable, we must 2956241a386cSMarc Zyngier * remove the cacheability attributes as 2957241a386cSMarc Zyngier * well. 2958241a386cSMarc Zyngier */ 2959241a386cSMarc Zyngier baser &= ~(GITS_CBASER_SHAREABILITY_MASK | 2960241a386cSMarc Zyngier GITS_CBASER_CACHEABILITY_MASK); 2961241a386cSMarc Zyngier baser |= GITS_CBASER_nC; 29620968a619SVladimir Murzin gits_write_cbaser(baser, its->base + GITS_CBASER); 2963241a386cSMarc Zyngier } 29644c21f3c2SMarc Zyngier pr_info("ITS: using cache flushing for cmd queue\n"); 29654c21f3c2SMarc Zyngier its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; 29664c21f3c2SMarc Zyngier } 29674c21f3c2SMarc Zyngier 29680968a619SVladimir Murzin gits_write_cwriter(0, its->base + GITS_CWRITER); 29693dfa576bSMarc Zyngier ctlr = readl_relaxed(its->base + GITS_CTLR); 29703dfa576bSMarc Zyngier writel_relaxed(ctlr | GITS_CTLR_ENABLE, its->base + GITS_CTLR); 2971241a386cSMarc Zyngier 2972db40f0a7STomasz Nowicki err = its_init_domain(handle, its); 2973d14ae5e6STomasz Nowicki if (err) 297454456db9SMarc Zyngier goto out_free_tables; 29754c21f3c2SMarc Zyngier 29764c21f3c2SMarc Zyngier spin_lock(&its_lock); 29774c21f3c2SMarc Zyngier list_add(&its->entry, &its_nodes); 29784c21f3c2SMarc Zyngier spin_unlock(&its_lock); 29794c21f3c2SMarc Zyngier 29804c21f3c2SMarc Zyngier return 0; 29814c21f3c2SMarc Zyngier 29824c21f3c2SMarc Zyngier out_free_tables: 29834c21f3c2SMarc Zyngier its_free_tables(its); 29844c21f3c2SMarc Zyngier out_free_cmd: 29855bc13c2cSRobert Richter free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); 29864c21f3c2SMarc Zyngier out_free_its: 29874c21f3c2SMarc Zyngier kfree(its); 29884c21f3c2SMarc Zyngier out_unmap: 29894c21f3c2SMarc Zyngier iounmap(its_base); 2990db40f0a7STomasz Nowicki pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); 29914c21f3c2SMarc Zyngier return err; 29924c21f3c2SMarc Zyngier } 29934c21f3c2SMarc Zyngier 29944c21f3c2SMarc Zyngier static bool gic_rdists_supports_plpis(void) 29954c21f3c2SMarc Zyngier { 2996589ce5f4SMarc Zyngier return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); 29974c21f3c2SMarc Zyngier } 29984c21f3c2SMarc Zyngier 29994c21f3c2SMarc Zyngier int its_cpu_init(void) 30004c21f3c2SMarc Zyngier { 300116acae72SVladimir Murzin if (!list_empty(&its_nodes)) { 30024c21f3c2SMarc Zyngier if (!gic_rdists_supports_plpis()) { 30034c21f3c2SMarc Zyngier pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); 30044c21f3c2SMarc Zyngier return -ENXIO; 30054c21f3c2SMarc Zyngier } 30064c21f3c2SMarc Zyngier its_cpu_init_lpis(); 30074c21f3c2SMarc Zyngier its_cpu_init_collection(); 30084c21f3c2SMarc Zyngier } 30094c21f3c2SMarc Zyngier 30104c21f3c2SMarc Zyngier return 0; 30114c21f3c2SMarc Zyngier } 30124c21f3c2SMarc Zyngier 3013935bba7cSArvind Yadav static const struct of_device_id its_device_id[] = { 30144c21f3c2SMarc Zyngier { .compatible = "arm,gic-v3-its", }, 30154c21f3c2SMarc Zyngier {}, 30164c21f3c2SMarc Zyngier }; 30174c21f3c2SMarc Zyngier 3018db40f0a7STomasz Nowicki static int __init its_of_probe(struct device_node *node) 30194c21f3c2SMarc Zyngier { 30204c21f3c2SMarc Zyngier struct device_node *np; 3021db40f0a7STomasz Nowicki struct resource res; 30224c21f3c2SMarc Zyngier 30234c21f3c2SMarc Zyngier for (np = of_find_matching_node(node, its_device_id); np; 30244c21f3c2SMarc Zyngier np = of_find_matching_node(np, its_device_id)) { 3025d14ae5e6STomasz Nowicki if (!of_property_read_bool(np, "msi-controller")) { 3026e81f54c6SRob Herring pr_warn("%pOF: no msi-controller property, ITS ignored\n", 3027e81f54c6SRob Herring np); 3028d14ae5e6STomasz Nowicki continue; 3029d14ae5e6STomasz Nowicki } 3030d14ae5e6STomasz Nowicki 3031db40f0a7STomasz Nowicki if (of_address_to_resource(np, 0, &res)) { 3032e81f54c6SRob Herring pr_warn("%pOF: no regs?\n", np); 3033db40f0a7STomasz Nowicki continue; 30344c21f3c2SMarc Zyngier } 30354c21f3c2SMarc Zyngier 3036db40f0a7STomasz Nowicki its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); 3037db40f0a7STomasz Nowicki } 3038db40f0a7STomasz Nowicki return 0; 3039db40f0a7STomasz Nowicki } 3040db40f0a7STomasz Nowicki 30413f010cf1STomasz Nowicki #ifdef CONFIG_ACPI 30423f010cf1STomasz Nowicki 30433f010cf1STomasz Nowicki #define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) 30443f010cf1STomasz Nowicki 3045dbd2b826SGanapatrao Kulkarni #if defined(CONFIG_ACPI_NUMA) && (ACPI_CA_VERSION >= 0x20170531) 3046dbd2b826SGanapatrao Kulkarni struct its_srat_map { 3047dbd2b826SGanapatrao Kulkarni /* numa node id */ 3048dbd2b826SGanapatrao Kulkarni u32 numa_node; 3049dbd2b826SGanapatrao Kulkarni /* GIC ITS ID */ 3050dbd2b826SGanapatrao Kulkarni u32 its_id; 3051dbd2b826SGanapatrao Kulkarni }; 3052dbd2b826SGanapatrao Kulkarni 3053dbd2b826SGanapatrao Kulkarni static struct its_srat_map its_srat_maps[MAX_NUMNODES] __initdata; 3054dbd2b826SGanapatrao Kulkarni static int its_in_srat __initdata; 3055dbd2b826SGanapatrao Kulkarni 3056dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) 3057dbd2b826SGanapatrao Kulkarni { 3058dbd2b826SGanapatrao Kulkarni int i; 3059dbd2b826SGanapatrao Kulkarni 3060dbd2b826SGanapatrao Kulkarni for (i = 0; i < its_in_srat; i++) { 3061dbd2b826SGanapatrao Kulkarni if (its_id == its_srat_maps[i].its_id) 3062dbd2b826SGanapatrao Kulkarni return its_srat_maps[i].numa_node; 3063dbd2b826SGanapatrao Kulkarni } 3064dbd2b826SGanapatrao Kulkarni return NUMA_NO_NODE; 3065dbd2b826SGanapatrao Kulkarni } 3066dbd2b826SGanapatrao Kulkarni 3067dbd2b826SGanapatrao Kulkarni static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header, 3068dbd2b826SGanapatrao Kulkarni const unsigned long end) 3069dbd2b826SGanapatrao Kulkarni { 3070dbd2b826SGanapatrao Kulkarni int node; 3071dbd2b826SGanapatrao Kulkarni struct acpi_srat_gic_its_affinity *its_affinity; 3072dbd2b826SGanapatrao Kulkarni 3073dbd2b826SGanapatrao Kulkarni its_affinity = (struct acpi_srat_gic_its_affinity *)header; 3074dbd2b826SGanapatrao Kulkarni if (!its_affinity) 3075dbd2b826SGanapatrao Kulkarni return -EINVAL; 3076dbd2b826SGanapatrao Kulkarni 3077dbd2b826SGanapatrao Kulkarni if (its_affinity->header.length < sizeof(*its_affinity)) { 3078dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid header length %d in ITS affinity\n", 3079dbd2b826SGanapatrao Kulkarni its_affinity->header.length); 3080dbd2b826SGanapatrao Kulkarni return -EINVAL; 3081dbd2b826SGanapatrao Kulkarni } 3082dbd2b826SGanapatrao Kulkarni 3083dbd2b826SGanapatrao Kulkarni if (its_in_srat >= MAX_NUMNODES) { 3084dbd2b826SGanapatrao Kulkarni pr_err("SRAT: ITS affinity exceeding max count[%d]\n", 3085dbd2b826SGanapatrao Kulkarni MAX_NUMNODES); 3086dbd2b826SGanapatrao Kulkarni return -EINVAL; 3087dbd2b826SGanapatrao Kulkarni } 3088dbd2b826SGanapatrao Kulkarni 3089dbd2b826SGanapatrao Kulkarni node = acpi_map_pxm_to_node(its_affinity->proximity_domain); 3090dbd2b826SGanapatrao Kulkarni 3091dbd2b826SGanapatrao Kulkarni if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { 3092dbd2b826SGanapatrao Kulkarni pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); 3093dbd2b826SGanapatrao Kulkarni return 0; 3094dbd2b826SGanapatrao Kulkarni } 3095dbd2b826SGanapatrao Kulkarni 3096dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].numa_node = node; 3097dbd2b826SGanapatrao Kulkarni its_srat_maps[its_in_srat].its_id = its_affinity->its_id; 3098dbd2b826SGanapatrao Kulkarni its_in_srat++; 3099dbd2b826SGanapatrao Kulkarni pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", 3100dbd2b826SGanapatrao Kulkarni its_affinity->proximity_domain, its_affinity->its_id, node); 3101dbd2b826SGanapatrao Kulkarni 3102dbd2b826SGanapatrao Kulkarni return 0; 3103dbd2b826SGanapatrao Kulkarni } 3104dbd2b826SGanapatrao Kulkarni 3105dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) 3106dbd2b826SGanapatrao Kulkarni { 3107dbd2b826SGanapatrao Kulkarni acpi_table_parse_entries(ACPI_SIG_SRAT, 3108dbd2b826SGanapatrao Kulkarni sizeof(struct acpi_table_srat), 3109dbd2b826SGanapatrao Kulkarni ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, 3110dbd2b826SGanapatrao Kulkarni gic_acpi_parse_srat_its, 0); 3111dbd2b826SGanapatrao Kulkarni } 3112dbd2b826SGanapatrao Kulkarni #else 3113dbd2b826SGanapatrao Kulkarni static void __init acpi_table_parse_srat_its(void) { } 3114dbd2b826SGanapatrao Kulkarni static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } 3115dbd2b826SGanapatrao Kulkarni #endif 3116dbd2b826SGanapatrao Kulkarni 31173f010cf1STomasz Nowicki static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header, 31183f010cf1STomasz Nowicki const unsigned long end) 31193f010cf1STomasz Nowicki { 31203f010cf1STomasz Nowicki struct acpi_madt_generic_translator *its_entry; 31213f010cf1STomasz Nowicki struct fwnode_handle *dom_handle; 31223f010cf1STomasz Nowicki struct resource res; 31233f010cf1STomasz Nowicki int err; 31243f010cf1STomasz Nowicki 31253f010cf1STomasz Nowicki its_entry = (struct acpi_madt_generic_translator *)header; 31263f010cf1STomasz Nowicki memset(&res, 0, sizeof(res)); 31273f010cf1STomasz Nowicki res.start = its_entry->base_address; 31283f010cf1STomasz Nowicki res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; 31293f010cf1STomasz Nowicki res.flags = IORESOURCE_MEM; 31303f010cf1STomasz Nowicki 31313f010cf1STomasz Nowicki dom_handle = irq_domain_alloc_fwnode((void *)its_entry->base_address); 31323f010cf1STomasz Nowicki if (!dom_handle) { 31333f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to allocate GICv3 ITS domain token\n", 31343f010cf1STomasz Nowicki &res.start); 31353f010cf1STomasz Nowicki return -ENOMEM; 31363f010cf1STomasz Nowicki } 31373f010cf1STomasz Nowicki 31383f010cf1STomasz Nowicki err = iort_register_domain_token(its_entry->translation_id, dom_handle); 31393f010cf1STomasz Nowicki if (err) { 31403f010cf1STomasz Nowicki pr_err("ITS@%pa: Unable to register GICv3 ITS domain token (ITS ID %d) to IORT\n", 31413f010cf1STomasz Nowicki &res.start, its_entry->translation_id); 31423f010cf1STomasz Nowicki goto dom_err; 31433f010cf1STomasz Nowicki } 31443f010cf1STomasz Nowicki 3145dbd2b826SGanapatrao Kulkarni err = its_probe_one(&res, dom_handle, 3146dbd2b826SGanapatrao Kulkarni acpi_get_its_numa_node(its_entry->translation_id)); 31473f010cf1STomasz Nowicki if (!err) 31483f010cf1STomasz Nowicki return 0; 31493f010cf1STomasz Nowicki 31503f010cf1STomasz Nowicki iort_deregister_domain_token(its_entry->translation_id); 31513f010cf1STomasz Nowicki dom_err: 31523f010cf1STomasz Nowicki irq_domain_free_fwnode(dom_handle); 31533f010cf1STomasz Nowicki return err; 31543f010cf1STomasz Nowicki } 31553f010cf1STomasz Nowicki 31563f010cf1STomasz Nowicki static void __init its_acpi_probe(void) 31573f010cf1STomasz Nowicki { 3158dbd2b826SGanapatrao Kulkarni acpi_table_parse_srat_its(); 31593f010cf1STomasz Nowicki acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, 31603f010cf1STomasz Nowicki gic_acpi_parse_madt_its, 0); 31613f010cf1STomasz Nowicki } 31623f010cf1STomasz Nowicki #else 31633f010cf1STomasz Nowicki static void __init its_acpi_probe(void) { } 31643f010cf1STomasz Nowicki #endif 31653f010cf1STomasz Nowicki 3166db40f0a7STomasz Nowicki int __init its_init(struct fwnode_handle *handle, struct rdists *rdists, 3167db40f0a7STomasz Nowicki struct irq_domain *parent_domain) 3168db40f0a7STomasz Nowicki { 3169db40f0a7STomasz Nowicki struct device_node *of_node; 31708fff27aeSMarc Zyngier struct its_node *its; 31718fff27aeSMarc Zyngier bool has_v4 = false; 31728fff27aeSMarc Zyngier int err; 3173db40f0a7STomasz Nowicki 3174db40f0a7STomasz Nowicki its_parent = parent_domain; 3175db40f0a7STomasz Nowicki of_node = to_of_node(handle); 3176db40f0a7STomasz Nowicki if (of_node) 3177db40f0a7STomasz Nowicki its_of_probe(of_node); 3178db40f0a7STomasz Nowicki else 31793f010cf1STomasz Nowicki its_acpi_probe(); 3180db40f0a7STomasz Nowicki 31814c21f3c2SMarc Zyngier if (list_empty(&its_nodes)) { 31824c21f3c2SMarc Zyngier pr_warn("ITS: No ITS available, not enabling LPIs\n"); 31834c21f3c2SMarc Zyngier return -ENXIO; 31844c21f3c2SMarc Zyngier } 31854c21f3c2SMarc Zyngier 31864c21f3c2SMarc Zyngier gic_rdists = rdists; 31878fff27aeSMarc Zyngier err = its_alloc_lpi_tables(); 31888fff27aeSMarc Zyngier if (err) 31898fff27aeSMarc Zyngier return err; 31908fff27aeSMarc Zyngier 31918fff27aeSMarc Zyngier list_for_each_entry(its, &its_nodes, entry) 31928fff27aeSMarc Zyngier has_v4 |= its->is_v4; 31938fff27aeSMarc Zyngier 31948fff27aeSMarc Zyngier if (has_v4 & rdists->has_vlpis) { 31958fff27aeSMarc Zyngier if (its_init_vpe_domain()) { 31968fff27aeSMarc Zyngier rdists->has_vlpis = false; 31978fff27aeSMarc Zyngier pr_err("ITS: Disabling GICv4 support\n"); 31988fff27aeSMarc Zyngier } 31998fff27aeSMarc Zyngier } 32008fff27aeSMarc Zyngier 32018fff27aeSMarc Zyngier return 0; 32024c21f3c2SMarc Zyngier } 3203