Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1 | /* |
| 2 | * IOMMU API for ARM architected SMMUv3 implementations. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | * |
| 16 | * Copyright (C) 2015 ARM Limited |
| 17 | * |
| 18 | * Author: Will Deacon <will.deacon@arm.com> |
| 19 | * |
| 20 | * This driver is powered by bad coffee and bombay mix. |
| 21 | */ |
| 22 | |
Lorenzo Pieralisi | e4dadfa | 2016-11-21 10:01:43 +0000 | [diff] [blame] | 23 | #include <linux/acpi.h> |
| 24 | #include <linux/acpi_iort.h> |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 25 | #include <linux/delay.h> |
Robin Murphy | 9adb959 | 2016-01-26 18:06:36 +0000 | [diff] [blame] | 26 | #include <linux/dma-iommu.h> |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 27 | #include <linux/err.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/iommu.h> |
| 30 | #include <linux/iopoll.h> |
| 31 | #include <linux/module.h> |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 32 | #include <linux/msi.h> |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 33 | #include <linux/of.h> |
| 34 | #include <linux/of_address.h> |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 35 | #include <linux/of_iommu.h> |
Will Deacon | 941a802 | 2015-08-11 16:25:10 +0100 | [diff] [blame] | 36 | #include <linux/of_platform.h> |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 37 | #include <linux/pci.h> |
| 38 | #include <linux/platform_device.h> |
| 39 | |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 40 | #include <linux/amba/bus.h> |
| 41 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 42 | #include "io-pgtable.h" |
| 43 | |
| 44 | /* MMIO registers */ |
| 45 | #define ARM_SMMU_IDR0 0x0 |
| 46 | #define IDR0_ST_LVL_SHIFT 27 |
| 47 | #define IDR0_ST_LVL_MASK 0x3 |
| 48 | #define IDR0_ST_LVL_2LVL (1 << IDR0_ST_LVL_SHIFT) |
Prem Mallappa | 6380be0 | 2015-12-14 22:01:23 +0530 | [diff] [blame] | 49 | #define IDR0_STALL_MODEL_SHIFT 24 |
| 50 | #define IDR0_STALL_MODEL_MASK 0x3 |
| 51 | #define IDR0_STALL_MODEL_STALL (0 << IDR0_STALL_MODEL_SHIFT) |
| 52 | #define IDR0_STALL_MODEL_FORCE (2 << IDR0_STALL_MODEL_SHIFT) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 53 | #define IDR0_TTENDIAN_SHIFT 21 |
| 54 | #define IDR0_TTENDIAN_MASK 0x3 |
| 55 | #define IDR0_TTENDIAN_LE (2 << IDR0_TTENDIAN_SHIFT) |
| 56 | #define IDR0_TTENDIAN_BE (3 << IDR0_TTENDIAN_SHIFT) |
| 57 | #define IDR0_TTENDIAN_MIXED (0 << IDR0_TTENDIAN_SHIFT) |
| 58 | #define IDR0_CD2L (1 << 19) |
| 59 | #define IDR0_VMID16 (1 << 18) |
| 60 | #define IDR0_PRI (1 << 16) |
| 61 | #define IDR0_SEV (1 << 14) |
| 62 | #define IDR0_MSI (1 << 13) |
| 63 | #define IDR0_ASID16 (1 << 12) |
| 64 | #define IDR0_ATS (1 << 10) |
| 65 | #define IDR0_HYP (1 << 9) |
| 66 | #define IDR0_COHACC (1 << 4) |
| 67 | #define IDR0_TTF_SHIFT 2 |
| 68 | #define IDR0_TTF_MASK 0x3 |
| 69 | #define IDR0_TTF_AARCH64 (2 << IDR0_TTF_SHIFT) |
Will Deacon | f0c453d | 2015-08-20 12:12:32 +0100 | [diff] [blame] | 70 | #define IDR0_TTF_AARCH32_64 (3 << IDR0_TTF_SHIFT) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 71 | #define IDR0_S1P (1 << 1) |
| 72 | #define IDR0_S2P (1 << 0) |
| 73 | |
| 74 | #define ARM_SMMU_IDR1 0x4 |
| 75 | #define IDR1_TABLES_PRESET (1 << 30) |
| 76 | #define IDR1_QUEUES_PRESET (1 << 29) |
| 77 | #define IDR1_REL (1 << 28) |
| 78 | #define IDR1_CMDQ_SHIFT 21 |
| 79 | #define IDR1_CMDQ_MASK 0x1f |
| 80 | #define IDR1_EVTQ_SHIFT 16 |
| 81 | #define IDR1_EVTQ_MASK 0x1f |
| 82 | #define IDR1_PRIQ_SHIFT 11 |
| 83 | #define IDR1_PRIQ_MASK 0x1f |
| 84 | #define IDR1_SSID_SHIFT 6 |
| 85 | #define IDR1_SSID_MASK 0x1f |
| 86 | #define IDR1_SID_SHIFT 0 |
| 87 | #define IDR1_SID_MASK 0x3f |
| 88 | |
| 89 | #define ARM_SMMU_IDR5 0x14 |
| 90 | #define IDR5_STALL_MAX_SHIFT 16 |
| 91 | #define IDR5_STALL_MAX_MASK 0xffff |
| 92 | #define IDR5_GRAN64K (1 << 6) |
| 93 | #define IDR5_GRAN16K (1 << 5) |
| 94 | #define IDR5_GRAN4K (1 << 4) |
| 95 | #define IDR5_OAS_SHIFT 0 |
| 96 | #define IDR5_OAS_MASK 0x7 |
| 97 | #define IDR5_OAS_32_BIT (0 << IDR5_OAS_SHIFT) |
| 98 | #define IDR5_OAS_36_BIT (1 << IDR5_OAS_SHIFT) |
| 99 | #define IDR5_OAS_40_BIT (2 << IDR5_OAS_SHIFT) |
| 100 | #define IDR5_OAS_42_BIT (3 << IDR5_OAS_SHIFT) |
| 101 | #define IDR5_OAS_44_BIT (4 << IDR5_OAS_SHIFT) |
| 102 | #define IDR5_OAS_48_BIT (5 << IDR5_OAS_SHIFT) |
| 103 | |
| 104 | #define ARM_SMMU_CR0 0x20 |
| 105 | #define CR0_CMDQEN (1 << 3) |
| 106 | #define CR0_EVTQEN (1 << 2) |
| 107 | #define CR0_PRIQEN (1 << 1) |
| 108 | #define CR0_SMMUEN (1 << 0) |
| 109 | |
| 110 | #define ARM_SMMU_CR0ACK 0x24 |
| 111 | |
| 112 | #define ARM_SMMU_CR1 0x28 |
| 113 | #define CR1_SH_NSH 0 |
| 114 | #define CR1_SH_OSH 2 |
| 115 | #define CR1_SH_ISH 3 |
| 116 | #define CR1_CACHE_NC 0 |
| 117 | #define CR1_CACHE_WB 1 |
| 118 | #define CR1_CACHE_WT 2 |
| 119 | #define CR1_TABLE_SH_SHIFT 10 |
| 120 | #define CR1_TABLE_OC_SHIFT 8 |
| 121 | #define CR1_TABLE_IC_SHIFT 6 |
| 122 | #define CR1_QUEUE_SH_SHIFT 4 |
| 123 | #define CR1_QUEUE_OC_SHIFT 2 |
| 124 | #define CR1_QUEUE_IC_SHIFT 0 |
| 125 | |
| 126 | #define ARM_SMMU_CR2 0x2c |
| 127 | #define CR2_PTM (1 << 2) |
| 128 | #define CR2_RECINVSID (1 << 1) |
| 129 | #define CR2_E2H (1 << 0) |
| 130 | |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 131 | #define ARM_SMMU_GBPA 0x44 |
| 132 | #define GBPA_ABORT (1 << 20) |
| 133 | #define GBPA_UPDATE (1 << 31) |
| 134 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 135 | #define ARM_SMMU_IRQ_CTRL 0x50 |
| 136 | #define IRQ_CTRL_EVTQ_IRQEN (1 << 2) |
Marc Zyngier | ccd6385 | 2015-07-15 11:55:18 +0100 | [diff] [blame] | 137 | #define IRQ_CTRL_PRIQ_IRQEN (1 << 1) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 138 | #define IRQ_CTRL_GERROR_IRQEN (1 << 0) |
| 139 | |
| 140 | #define ARM_SMMU_IRQ_CTRLACK 0x54 |
| 141 | |
| 142 | #define ARM_SMMU_GERROR 0x60 |
| 143 | #define GERROR_SFM_ERR (1 << 8) |
| 144 | #define GERROR_MSI_GERROR_ABT_ERR (1 << 7) |
| 145 | #define GERROR_MSI_PRIQ_ABT_ERR (1 << 6) |
| 146 | #define GERROR_MSI_EVTQ_ABT_ERR (1 << 5) |
| 147 | #define GERROR_MSI_CMDQ_ABT_ERR (1 << 4) |
| 148 | #define GERROR_PRIQ_ABT_ERR (1 << 3) |
| 149 | #define GERROR_EVTQ_ABT_ERR (1 << 2) |
| 150 | #define GERROR_CMDQ_ERR (1 << 0) |
| 151 | #define GERROR_ERR_MASK 0xfd |
| 152 | |
| 153 | #define ARM_SMMU_GERRORN 0x64 |
| 154 | |
| 155 | #define ARM_SMMU_GERROR_IRQ_CFG0 0x68 |
| 156 | #define ARM_SMMU_GERROR_IRQ_CFG1 0x70 |
| 157 | #define ARM_SMMU_GERROR_IRQ_CFG2 0x74 |
| 158 | |
| 159 | #define ARM_SMMU_STRTAB_BASE 0x80 |
| 160 | #define STRTAB_BASE_RA (1UL << 62) |
| 161 | #define STRTAB_BASE_ADDR_SHIFT 6 |
| 162 | #define STRTAB_BASE_ADDR_MASK 0x3ffffffffffUL |
| 163 | |
| 164 | #define ARM_SMMU_STRTAB_BASE_CFG 0x88 |
| 165 | #define STRTAB_BASE_CFG_LOG2SIZE_SHIFT 0 |
| 166 | #define STRTAB_BASE_CFG_LOG2SIZE_MASK 0x3f |
| 167 | #define STRTAB_BASE_CFG_SPLIT_SHIFT 6 |
| 168 | #define STRTAB_BASE_CFG_SPLIT_MASK 0x1f |
| 169 | #define STRTAB_BASE_CFG_FMT_SHIFT 16 |
| 170 | #define STRTAB_BASE_CFG_FMT_MASK 0x3 |
| 171 | #define STRTAB_BASE_CFG_FMT_LINEAR (0 << STRTAB_BASE_CFG_FMT_SHIFT) |
| 172 | #define STRTAB_BASE_CFG_FMT_2LVL (1 << STRTAB_BASE_CFG_FMT_SHIFT) |
| 173 | |
| 174 | #define ARM_SMMU_CMDQ_BASE 0x90 |
| 175 | #define ARM_SMMU_CMDQ_PROD 0x98 |
| 176 | #define ARM_SMMU_CMDQ_CONS 0x9c |
| 177 | |
| 178 | #define ARM_SMMU_EVTQ_BASE 0xa0 |
| 179 | #define ARM_SMMU_EVTQ_PROD 0x100a8 |
| 180 | #define ARM_SMMU_EVTQ_CONS 0x100ac |
| 181 | #define ARM_SMMU_EVTQ_IRQ_CFG0 0xb0 |
| 182 | #define ARM_SMMU_EVTQ_IRQ_CFG1 0xb8 |
| 183 | #define ARM_SMMU_EVTQ_IRQ_CFG2 0xbc |
| 184 | |
| 185 | #define ARM_SMMU_PRIQ_BASE 0xc0 |
| 186 | #define ARM_SMMU_PRIQ_PROD 0x100c8 |
| 187 | #define ARM_SMMU_PRIQ_CONS 0x100cc |
| 188 | #define ARM_SMMU_PRIQ_IRQ_CFG0 0xd0 |
| 189 | #define ARM_SMMU_PRIQ_IRQ_CFG1 0xd8 |
| 190 | #define ARM_SMMU_PRIQ_IRQ_CFG2 0xdc |
| 191 | |
| 192 | /* Common MSI config fields */ |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 193 | #define MSI_CFG0_ADDR_SHIFT 2 |
| 194 | #define MSI_CFG0_ADDR_MASK 0x3fffffffffffUL |
Marc Zyngier | ec11d63 | 2015-07-15 11:55:19 +0100 | [diff] [blame] | 195 | #define MSI_CFG2_SH_SHIFT 4 |
| 196 | #define MSI_CFG2_SH_NSH (0UL << MSI_CFG2_SH_SHIFT) |
| 197 | #define MSI_CFG2_SH_OSH (2UL << MSI_CFG2_SH_SHIFT) |
| 198 | #define MSI_CFG2_SH_ISH (3UL << MSI_CFG2_SH_SHIFT) |
| 199 | #define MSI_CFG2_MEMATTR_SHIFT 0 |
| 200 | #define MSI_CFG2_MEMATTR_DEVICE_nGnRE (0x1 << MSI_CFG2_MEMATTR_SHIFT) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 201 | |
| 202 | #define Q_IDX(q, p) ((p) & ((1 << (q)->max_n_shift) - 1)) |
| 203 | #define Q_WRP(q, p) ((p) & (1 << (q)->max_n_shift)) |
| 204 | #define Q_OVERFLOW_FLAG (1 << 31) |
| 205 | #define Q_OVF(q, p) ((p) & Q_OVERFLOW_FLAG) |
| 206 | #define Q_ENT(q, p) ((q)->base + \ |
| 207 | Q_IDX(q, p) * (q)->ent_dwords) |
| 208 | |
| 209 | #define Q_BASE_RWA (1UL << 62) |
| 210 | #define Q_BASE_ADDR_SHIFT 5 |
| 211 | #define Q_BASE_ADDR_MASK 0xfffffffffffUL |
| 212 | #define Q_BASE_LOG2SIZE_SHIFT 0 |
| 213 | #define Q_BASE_LOG2SIZE_MASK 0x1fUL |
| 214 | |
| 215 | /* |
| 216 | * Stream table. |
| 217 | * |
| 218 | * Linear: Enough to cover 1 << IDR1.SIDSIZE entries |
Zhen Lei | e2f4c23 | 2015-07-07 04:30:17 +0100 | [diff] [blame] | 219 | * 2lvl: 128k L1 entries, |
| 220 | * 256 lazy entries per table (each table covers a PCI bus) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 221 | */ |
Zhen Lei | e2f4c23 | 2015-07-07 04:30:17 +0100 | [diff] [blame] | 222 | #define STRTAB_L1_SZ_SHIFT 20 |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 223 | #define STRTAB_SPLIT 8 |
| 224 | |
| 225 | #define STRTAB_L1_DESC_DWORDS 1 |
| 226 | #define STRTAB_L1_DESC_SPAN_SHIFT 0 |
| 227 | #define STRTAB_L1_DESC_SPAN_MASK 0x1fUL |
| 228 | #define STRTAB_L1_DESC_L2PTR_SHIFT 6 |
| 229 | #define STRTAB_L1_DESC_L2PTR_MASK 0x3ffffffffffUL |
| 230 | |
| 231 | #define STRTAB_STE_DWORDS 8 |
| 232 | #define STRTAB_STE_0_V (1UL << 0) |
| 233 | #define STRTAB_STE_0_CFG_SHIFT 1 |
| 234 | #define STRTAB_STE_0_CFG_MASK 0x7UL |
| 235 | #define STRTAB_STE_0_CFG_ABORT (0UL << STRTAB_STE_0_CFG_SHIFT) |
| 236 | #define STRTAB_STE_0_CFG_BYPASS (4UL << STRTAB_STE_0_CFG_SHIFT) |
| 237 | #define STRTAB_STE_0_CFG_S1_TRANS (5UL << STRTAB_STE_0_CFG_SHIFT) |
| 238 | #define STRTAB_STE_0_CFG_S2_TRANS (6UL << STRTAB_STE_0_CFG_SHIFT) |
| 239 | |
| 240 | #define STRTAB_STE_0_S1FMT_SHIFT 4 |
| 241 | #define STRTAB_STE_0_S1FMT_LINEAR (0UL << STRTAB_STE_0_S1FMT_SHIFT) |
| 242 | #define STRTAB_STE_0_S1CTXPTR_SHIFT 6 |
| 243 | #define STRTAB_STE_0_S1CTXPTR_MASK 0x3ffffffffffUL |
| 244 | #define STRTAB_STE_0_S1CDMAX_SHIFT 59 |
| 245 | #define STRTAB_STE_0_S1CDMAX_MASK 0x1fUL |
| 246 | |
| 247 | #define STRTAB_STE_1_S1C_CACHE_NC 0UL |
| 248 | #define STRTAB_STE_1_S1C_CACHE_WBRA 1UL |
| 249 | #define STRTAB_STE_1_S1C_CACHE_WT 2UL |
| 250 | #define STRTAB_STE_1_S1C_CACHE_WB 3UL |
| 251 | #define STRTAB_STE_1_S1C_SH_NSH 0UL |
| 252 | #define STRTAB_STE_1_S1C_SH_OSH 2UL |
| 253 | #define STRTAB_STE_1_S1C_SH_ISH 3UL |
| 254 | #define STRTAB_STE_1_S1CIR_SHIFT 2 |
| 255 | #define STRTAB_STE_1_S1COR_SHIFT 4 |
| 256 | #define STRTAB_STE_1_S1CSH_SHIFT 6 |
| 257 | |
| 258 | #define STRTAB_STE_1_S1STALLD (1UL << 27) |
| 259 | |
| 260 | #define STRTAB_STE_1_EATS_ABT 0UL |
| 261 | #define STRTAB_STE_1_EATS_TRANS 1UL |
| 262 | #define STRTAB_STE_1_EATS_S1CHK 2UL |
| 263 | #define STRTAB_STE_1_EATS_SHIFT 28 |
| 264 | |
| 265 | #define STRTAB_STE_1_STRW_NSEL1 0UL |
| 266 | #define STRTAB_STE_1_STRW_EL2 2UL |
| 267 | #define STRTAB_STE_1_STRW_SHIFT 30 |
| 268 | |
Will Deacon | a0eacd8 | 2015-11-18 18:15:51 +0000 | [diff] [blame] | 269 | #define STRTAB_STE_1_SHCFG_INCOMING 1UL |
| 270 | #define STRTAB_STE_1_SHCFG_SHIFT 44 |
| 271 | |
Robin Murphy | 95fa99a | 2016-09-12 17:13:47 +0100 | [diff] [blame] | 272 | #define STRTAB_STE_1_PRIVCFG_UNPRIV 2UL |
| 273 | #define STRTAB_STE_1_PRIVCFG_SHIFT 48 |
| 274 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 275 | #define STRTAB_STE_2_S2VMID_SHIFT 0 |
| 276 | #define STRTAB_STE_2_S2VMID_MASK 0xffffUL |
| 277 | #define STRTAB_STE_2_VTCR_SHIFT 32 |
| 278 | #define STRTAB_STE_2_VTCR_MASK 0x7ffffUL |
| 279 | #define STRTAB_STE_2_S2AA64 (1UL << 51) |
| 280 | #define STRTAB_STE_2_S2ENDI (1UL << 52) |
| 281 | #define STRTAB_STE_2_S2PTW (1UL << 54) |
| 282 | #define STRTAB_STE_2_S2R (1UL << 58) |
| 283 | |
| 284 | #define STRTAB_STE_3_S2TTB_SHIFT 4 |
| 285 | #define STRTAB_STE_3_S2TTB_MASK 0xfffffffffffUL |
| 286 | |
| 287 | /* Context descriptor (stage-1 only) */ |
| 288 | #define CTXDESC_CD_DWORDS 8 |
| 289 | #define CTXDESC_CD_0_TCR_T0SZ_SHIFT 0 |
| 290 | #define ARM64_TCR_T0SZ_SHIFT 0 |
| 291 | #define ARM64_TCR_T0SZ_MASK 0x1fUL |
| 292 | #define CTXDESC_CD_0_TCR_TG0_SHIFT 6 |
| 293 | #define ARM64_TCR_TG0_SHIFT 14 |
| 294 | #define ARM64_TCR_TG0_MASK 0x3UL |
| 295 | #define CTXDESC_CD_0_TCR_IRGN0_SHIFT 8 |
Zhen Lei | 5d58c62 | 2015-06-26 09:32:59 +0100 | [diff] [blame] | 296 | #define ARM64_TCR_IRGN0_SHIFT 8 |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 297 | #define ARM64_TCR_IRGN0_MASK 0x3UL |
| 298 | #define CTXDESC_CD_0_TCR_ORGN0_SHIFT 10 |
Zhen Lei | 5d58c62 | 2015-06-26 09:32:59 +0100 | [diff] [blame] | 299 | #define ARM64_TCR_ORGN0_SHIFT 10 |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 300 | #define ARM64_TCR_ORGN0_MASK 0x3UL |
| 301 | #define CTXDESC_CD_0_TCR_SH0_SHIFT 12 |
| 302 | #define ARM64_TCR_SH0_SHIFT 12 |
| 303 | #define ARM64_TCR_SH0_MASK 0x3UL |
| 304 | #define CTXDESC_CD_0_TCR_EPD0_SHIFT 14 |
| 305 | #define ARM64_TCR_EPD0_SHIFT 7 |
| 306 | #define ARM64_TCR_EPD0_MASK 0x1UL |
| 307 | #define CTXDESC_CD_0_TCR_EPD1_SHIFT 30 |
| 308 | #define ARM64_TCR_EPD1_SHIFT 23 |
| 309 | #define ARM64_TCR_EPD1_MASK 0x1UL |
| 310 | |
| 311 | #define CTXDESC_CD_0_ENDI (1UL << 15) |
| 312 | #define CTXDESC_CD_0_V (1UL << 31) |
| 313 | |
| 314 | #define CTXDESC_CD_0_TCR_IPS_SHIFT 32 |
| 315 | #define ARM64_TCR_IPS_SHIFT 32 |
| 316 | #define ARM64_TCR_IPS_MASK 0x7UL |
| 317 | #define CTXDESC_CD_0_TCR_TBI0_SHIFT 38 |
| 318 | #define ARM64_TCR_TBI0_SHIFT 37 |
| 319 | #define ARM64_TCR_TBI0_MASK 0x1UL |
| 320 | |
| 321 | #define CTXDESC_CD_0_AA64 (1UL << 41) |
| 322 | #define CTXDESC_CD_0_R (1UL << 45) |
| 323 | #define CTXDESC_CD_0_A (1UL << 46) |
| 324 | #define CTXDESC_CD_0_ASET_SHIFT 47 |
| 325 | #define CTXDESC_CD_0_ASET_SHARED (0UL << CTXDESC_CD_0_ASET_SHIFT) |
| 326 | #define CTXDESC_CD_0_ASET_PRIVATE (1UL << CTXDESC_CD_0_ASET_SHIFT) |
| 327 | #define CTXDESC_CD_0_ASID_SHIFT 48 |
| 328 | #define CTXDESC_CD_0_ASID_MASK 0xffffUL |
| 329 | |
| 330 | #define CTXDESC_CD_1_TTB0_SHIFT 4 |
| 331 | #define CTXDESC_CD_1_TTB0_MASK 0xfffffffffffUL |
| 332 | |
| 333 | #define CTXDESC_CD_3_MAIR_SHIFT 0 |
| 334 | |
| 335 | /* Convert between AArch64 (CPU) TCR format and SMMU CD format */ |
| 336 | #define ARM_SMMU_TCR2CD(tcr, fld) \ |
| 337 | (((tcr) >> ARM64_TCR_##fld##_SHIFT & ARM64_TCR_##fld##_MASK) \ |
| 338 | << CTXDESC_CD_0_TCR_##fld##_SHIFT) |
| 339 | |
| 340 | /* Command queue */ |
| 341 | #define CMDQ_ENT_DWORDS 2 |
| 342 | #define CMDQ_MAX_SZ_SHIFT 8 |
| 343 | |
| 344 | #define CMDQ_ERR_SHIFT 24 |
| 345 | #define CMDQ_ERR_MASK 0x7f |
| 346 | #define CMDQ_ERR_CERROR_NONE_IDX 0 |
| 347 | #define CMDQ_ERR_CERROR_ILL_IDX 1 |
| 348 | #define CMDQ_ERR_CERROR_ABT_IDX 2 |
| 349 | |
| 350 | #define CMDQ_0_OP_SHIFT 0 |
| 351 | #define CMDQ_0_OP_MASK 0xffUL |
| 352 | #define CMDQ_0_SSV (1UL << 11) |
| 353 | |
| 354 | #define CMDQ_PREFETCH_0_SID_SHIFT 32 |
| 355 | #define CMDQ_PREFETCH_1_SIZE_SHIFT 0 |
| 356 | #define CMDQ_PREFETCH_1_ADDR_MASK ~0xfffUL |
| 357 | |
| 358 | #define CMDQ_CFGI_0_SID_SHIFT 32 |
| 359 | #define CMDQ_CFGI_0_SID_MASK 0xffffffffUL |
| 360 | #define CMDQ_CFGI_1_LEAF (1UL << 0) |
| 361 | #define CMDQ_CFGI_1_RANGE_SHIFT 0 |
| 362 | #define CMDQ_CFGI_1_RANGE_MASK 0x1fUL |
| 363 | |
| 364 | #define CMDQ_TLBI_0_VMID_SHIFT 32 |
| 365 | #define CMDQ_TLBI_0_ASID_SHIFT 48 |
| 366 | #define CMDQ_TLBI_1_LEAF (1UL << 0) |
Will Deacon | 1c27df1 | 2015-09-18 16:12:56 +0100 | [diff] [blame] | 367 | #define CMDQ_TLBI_1_VA_MASK ~0xfffUL |
| 368 | #define CMDQ_TLBI_1_IPA_MASK 0xfffffffff000UL |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 369 | |
| 370 | #define CMDQ_PRI_0_SSID_SHIFT 12 |
| 371 | #define CMDQ_PRI_0_SSID_MASK 0xfffffUL |
| 372 | #define CMDQ_PRI_0_SID_SHIFT 32 |
| 373 | #define CMDQ_PRI_0_SID_MASK 0xffffffffUL |
| 374 | #define CMDQ_PRI_1_GRPID_SHIFT 0 |
| 375 | #define CMDQ_PRI_1_GRPID_MASK 0x1ffUL |
| 376 | #define CMDQ_PRI_1_RESP_SHIFT 12 |
| 377 | #define CMDQ_PRI_1_RESP_DENY (0UL << CMDQ_PRI_1_RESP_SHIFT) |
| 378 | #define CMDQ_PRI_1_RESP_FAIL (1UL << CMDQ_PRI_1_RESP_SHIFT) |
| 379 | #define CMDQ_PRI_1_RESP_SUCC (2UL << CMDQ_PRI_1_RESP_SHIFT) |
| 380 | |
| 381 | #define CMDQ_SYNC_0_CS_SHIFT 12 |
| 382 | #define CMDQ_SYNC_0_CS_NONE (0UL << CMDQ_SYNC_0_CS_SHIFT) |
| 383 | #define CMDQ_SYNC_0_CS_SEV (2UL << CMDQ_SYNC_0_CS_SHIFT) |
| 384 | |
| 385 | /* Event queue */ |
| 386 | #define EVTQ_ENT_DWORDS 4 |
| 387 | #define EVTQ_MAX_SZ_SHIFT 7 |
| 388 | |
| 389 | #define EVTQ_0_ID_SHIFT 0 |
| 390 | #define EVTQ_0_ID_MASK 0xffUL |
| 391 | |
| 392 | /* PRI queue */ |
| 393 | #define PRIQ_ENT_DWORDS 2 |
| 394 | #define PRIQ_MAX_SZ_SHIFT 8 |
| 395 | |
| 396 | #define PRIQ_0_SID_SHIFT 0 |
| 397 | #define PRIQ_0_SID_MASK 0xffffffffUL |
| 398 | #define PRIQ_0_SSID_SHIFT 32 |
| 399 | #define PRIQ_0_SSID_MASK 0xfffffUL |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 400 | #define PRIQ_0_PERM_PRIV (1UL << 58) |
| 401 | #define PRIQ_0_PERM_EXEC (1UL << 59) |
| 402 | #define PRIQ_0_PERM_READ (1UL << 60) |
| 403 | #define PRIQ_0_PERM_WRITE (1UL << 61) |
| 404 | #define PRIQ_0_PRG_LAST (1UL << 62) |
| 405 | #define PRIQ_0_SSID_V (1UL << 63) |
| 406 | |
| 407 | #define PRIQ_1_PRG_IDX_SHIFT 0 |
| 408 | #define PRIQ_1_PRG_IDX_MASK 0x1ffUL |
| 409 | #define PRIQ_1_ADDR_SHIFT 12 |
| 410 | #define PRIQ_1_ADDR_MASK 0xfffffffffffffUL |
| 411 | |
| 412 | /* High-level queue structures */ |
| 413 | #define ARM_SMMU_POLL_TIMEOUT_US 100 |
| 414 | |
| 415 | static bool disable_bypass; |
| 416 | module_param_named(disable_bypass, disable_bypass, bool, S_IRUGO); |
| 417 | MODULE_PARM_DESC(disable_bypass, |
| 418 | "Disable bypass streams such that incoming transactions from devices that are not attached to an iommu domain will report an abort back to the device and will not be allowed to pass through the SMMU."); |
| 419 | |
| 420 | enum pri_resp { |
| 421 | PRI_RESP_DENY, |
| 422 | PRI_RESP_FAIL, |
| 423 | PRI_RESP_SUCC, |
| 424 | }; |
| 425 | |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 426 | enum arm_smmu_msi_index { |
| 427 | EVTQ_MSI_INDEX, |
| 428 | GERROR_MSI_INDEX, |
| 429 | PRIQ_MSI_INDEX, |
| 430 | ARM_SMMU_MAX_MSIS, |
| 431 | }; |
| 432 | |
| 433 | static phys_addr_t arm_smmu_msi_cfg[ARM_SMMU_MAX_MSIS][3] = { |
| 434 | [EVTQ_MSI_INDEX] = { |
| 435 | ARM_SMMU_EVTQ_IRQ_CFG0, |
| 436 | ARM_SMMU_EVTQ_IRQ_CFG1, |
| 437 | ARM_SMMU_EVTQ_IRQ_CFG2, |
| 438 | }, |
| 439 | [GERROR_MSI_INDEX] = { |
| 440 | ARM_SMMU_GERROR_IRQ_CFG0, |
| 441 | ARM_SMMU_GERROR_IRQ_CFG1, |
| 442 | ARM_SMMU_GERROR_IRQ_CFG2, |
| 443 | }, |
| 444 | [PRIQ_MSI_INDEX] = { |
| 445 | ARM_SMMU_PRIQ_IRQ_CFG0, |
| 446 | ARM_SMMU_PRIQ_IRQ_CFG1, |
| 447 | ARM_SMMU_PRIQ_IRQ_CFG2, |
| 448 | }, |
| 449 | }; |
| 450 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 451 | struct arm_smmu_cmdq_ent { |
| 452 | /* Common fields */ |
| 453 | u8 opcode; |
| 454 | bool substream_valid; |
| 455 | |
| 456 | /* Command-specific fields */ |
| 457 | union { |
| 458 | #define CMDQ_OP_PREFETCH_CFG 0x1 |
| 459 | struct { |
| 460 | u32 sid; |
| 461 | u8 size; |
| 462 | u64 addr; |
| 463 | } prefetch; |
| 464 | |
| 465 | #define CMDQ_OP_CFGI_STE 0x3 |
| 466 | #define CMDQ_OP_CFGI_ALL 0x4 |
| 467 | struct { |
| 468 | u32 sid; |
| 469 | union { |
| 470 | bool leaf; |
| 471 | u8 span; |
| 472 | }; |
| 473 | } cfgi; |
| 474 | |
| 475 | #define CMDQ_OP_TLBI_NH_ASID 0x11 |
| 476 | #define CMDQ_OP_TLBI_NH_VA 0x12 |
| 477 | #define CMDQ_OP_TLBI_EL2_ALL 0x20 |
| 478 | #define CMDQ_OP_TLBI_S12_VMALL 0x28 |
| 479 | #define CMDQ_OP_TLBI_S2_IPA 0x2a |
| 480 | #define CMDQ_OP_TLBI_NSNH_ALL 0x30 |
| 481 | struct { |
| 482 | u16 asid; |
| 483 | u16 vmid; |
| 484 | bool leaf; |
| 485 | u64 addr; |
| 486 | } tlbi; |
| 487 | |
| 488 | #define CMDQ_OP_PRI_RESP 0x41 |
| 489 | struct { |
| 490 | u32 sid; |
| 491 | u32 ssid; |
| 492 | u16 grpid; |
| 493 | enum pri_resp resp; |
| 494 | } pri; |
| 495 | |
| 496 | #define CMDQ_OP_CMD_SYNC 0x46 |
| 497 | }; |
| 498 | }; |
| 499 | |
| 500 | struct arm_smmu_queue { |
| 501 | int irq; /* Wired interrupt */ |
| 502 | |
| 503 | __le64 *base; |
| 504 | dma_addr_t base_dma; |
| 505 | u64 q_base; |
| 506 | |
| 507 | size_t ent_dwords; |
| 508 | u32 max_n_shift; |
| 509 | u32 prod; |
| 510 | u32 cons; |
| 511 | |
| 512 | u32 __iomem *prod_reg; |
| 513 | u32 __iomem *cons_reg; |
| 514 | }; |
| 515 | |
| 516 | struct arm_smmu_cmdq { |
| 517 | struct arm_smmu_queue q; |
| 518 | spinlock_t lock; |
| 519 | }; |
| 520 | |
| 521 | struct arm_smmu_evtq { |
| 522 | struct arm_smmu_queue q; |
| 523 | u32 max_stalls; |
| 524 | }; |
| 525 | |
| 526 | struct arm_smmu_priq { |
| 527 | struct arm_smmu_queue q; |
| 528 | }; |
| 529 | |
| 530 | /* High-level stream table and context descriptor structures */ |
| 531 | struct arm_smmu_strtab_l1_desc { |
| 532 | u8 span; |
| 533 | |
| 534 | __le64 *l2ptr; |
| 535 | dma_addr_t l2ptr_dma; |
| 536 | }; |
| 537 | |
| 538 | struct arm_smmu_s1_cfg { |
| 539 | __le64 *cdptr; |
| 540 | dma_addr_t cdptr_dma; |
| 541 | |
| 542 | struct arm_smmu_ctx_desc { |
| 543 | u16 asid; |
| 544 | u64 ttbr; |
| 545 | u64 tcr; |
| 546 | u64 mair; |
| 547 | } cd; |
| 548 | }; |
| 549 | |
| 550 | struct arm_smmu_s2_cfg { |
| 551 | u16 vmid; |
| 552 | u64 vttbr; |
| 553 | u64 vtcr; |
| 554 | }; |
| 555 | |
| 556 | struct arm_smmu_strtab_ent { |
| 557 | bool valid; |
| 558 | |
| 559 | bool bypass; /* Overrides s1/s2 config */ |
| 560 | struct arm_smmu_s1_cfg *s1_cfg; |
| 561 | struct arm_smmu_s2_cfg *s2_cfg; |
| 562 | }; |
| 563 | |
| 564 | struct arm_smmu_strtab_cfg { |
| 565 | __le64 *strtab; |
| 566 | dma_addr_t strtab_dma; |
| 567 | struct arm_smmu_strtab_l1_desc *l1_desc; |
| 568 | unsigned int num_l1_ents; |
| 569 | |
| 570 | u64 strtab_base; |
| 571 | u32 strtab_base_cfg; |
| 572 | }; |
| 573 | |
| 574 | /* An SMMUv3 instance */ |
| 575 | struct arm_smmu_device { |
| 576 | struct device *dev; |
| 577 | void __iomem *base; |
| 578 | |
| 579 | #define ARM_SMMU_FEAT_2_LVL_STRTAB (1 << 0) |
| 580 | #define ARM_SMMU_FEAT_2_LVL_CDTAB (1 << 1) |
| 581 | #define ARM_SMMU_FEAT_TT_LE (1 << 2) |
| 582 | #define ARM_SMMU_FEAT_TT_BE (1 << 3) |
| 583 | #define ARM_SMMU_FEAT_PRI (1 << 4) |
| 584 | #define ARM_SMMU_FEAT_ATS (1 << 5) |
| 585 | #define ARM_SMMU_FEAT_SEV (1 << 6) |
| 586 | #define ARM_SMMU_FEAT_MSI (1 << 7) |
| 587 | #define ARM_SMMU_FEAT_COHERENCY (1 << 8) |
| 588 | #define ARM_SMMU_FEAT_TRANS_S1 (1 << 9) |
| 589 | #define ARM_SMMU_FEAT_TRANS_S2 (1 << 10) |
| 590 | #define ARM_SMMU_FEAT_STALLS (1 << 11) |
| 591 | #define ARM_SMMU_FEAT_HYP (1 << 12) |
| 592 | u32 features; |
| 593 | |
Zhen Lei | 5e92946 | 2015-07-07 04:30:18 +0100 | [diff] [blame] | 594 | #define ARM_SMMU_OPT_SKIP_PREFETCH (1 << 0) |
| 595 | u32 options; |
| 596 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 597 | struct arm_smmu_cmdq cmdq; |
| 598 | struct arm_smmu_evtq evtq; |
| 599 | struct arm_smmu_priq priq; |
| 600 | |
| 601 | int gerr_irq; |
| 602 | |
| 603 | unsigned long ias; /* IPA */ |
| 604 | unsigned long oas; /* PA */ |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 605 | unsigned long pgsize_bitmap; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 606 | |
| 607 | #define ARM_SMMU_MAX_ASIDS (1 << 16) |
| 608 | unsigned int asid_bits; |
| 609 | DECLARE_BITMAP(asid_map, ARM_SMMU_MAX_ASIDS); |
| 610 | |
| 611 | #define ARM_SMMU_MAX_VMIDS (1 << 16) |
| 612 | unsigned int vmid_bits; |
| 613 | DECLARE_BITMAP(vmid_map, ARM_SMMU_MAX_VMIDS); |
| 614 | |
| 615 | unsigned int ssid_bits; |
| 616 | unsigned int sid_bits; |
| 617 | |
| 618 | struct arm_smmu_strtab_cfg strtab_cfg; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 619 | }; |
| 620 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 621 | /* SMMU private data for each master */ |
| 622 | struct arm_smmu_master_data { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 623 | struct arm_smmu_device *smmu; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 624 | struct arm_smmu_strtab_ent ste; |
| 625 | }; |
| 626 | |
| 627 | /* SMMU private data for an IOMMU domain */ |
| 628 | enum arm_smmu_domain_stage { |
| 629 | ARM_SMMU_DOMAIN_S1 = 0, |
| 630 | ARM_SMMU_DOMAIN_S2, |
| 631 | ARM_SMMU_DOMAIN_NESTED, |
| 632 | }; |
| 633 | |
| 634 | struct arm_smmu_domain { |
| 635 | struct arm_smmu_device *smmu; |
| 636 | struct mutex init_mutex; /* Protects smmu pointer */ |
| 637 | |
| 638 | struct io_pgtable_ops *pgtbl_ops; |
| 639 | spinlock_t pgtbl_lock; |
| 640 | |
| 641 | enum arm_smmu_domain_stage stage; |
| 642 | union { |
| 643 | struct arm_smmu_s1_cfg s1_cfg; |
| 644 | struct arm_smmu_s2_cfg s2_cfg; |
| 645 | }; |
| 646 | |
| 647 | struct iommu_domain domain; |
| 648 | }; |
| 649 | |
Zhen Lei | 5e92946 | 2015-07-07 04:30:18 +0100 | [diff] [blame] | 650 | struct arm_smmu_option_prop { |
| 651 | u32 opt; |
| 652 | const char *prop; |
| 653 | }; |
| 654 | |
| 655 | static struct arm_smmu_option_prop arm_smmu_options[] = { |
| 656 | { ARM_SMMU_OPT_SKIP_PREFETCH, "hisilicon,broken-prefetch-cmd" }, |
| 657 | { 0, NULL}, |
| 658 | }; |
| 659 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 660 | static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom) |
| 661 | { |
| 662 | return container_of(dom, struct arm_smmu_domain, domain); |
| 663 | } |
| 664 | |
Zhen Lei | 5e92946 | 2015-07-07 04:30:18 +0100 | [diff] [blame] | 665 | static void parse_driver_options(struct arm_smmu_device *smmu) |
| 666 | { |
| 667 | int i = 0; |
| 668 | |
| 669 | do { |
| 670 | if (of_property_read_bool(smmu->dev->of_node, |
| 671 | arm_smmu_options[i].prop)) { |
| 672 | smmu->options |= arm_smmu_options[i].opt; |
| 673 | dev_notice(smmu->dev, "option %s\n", |
| 674 | arm_smmu_options[i].prop); |
| 675 | } |
| 676 | } while (arm_smmu_options[++i].opt); |
| 677 | } |
| 678 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 679 | /* Low-level queue manipulation functions */ |
| 680 | static bool queue_full(struct arm_smmu_queue *q) |
| 681 | { |
| 682 | return Q_IDX(q, q->prod) == Q_IDX(q, q->cons) && |
| 683 | Q_WRP(q, q->prod) != Q_WRP(q, q->cons); |
| 684 | } |
| 685 | |
| 686 | static bool queue_empty(struct arm_smmu_queue *q) |
| 687 | { |
| 688 | return Q_IDX(q, q->prod) == Q_IDX(q, q->cons) && |
| 689 | Q_WRP(q, q->prod) == Q_WRP(q, q->cons); |
| 690 | } |
| 691 | |
| 692 | static void queue_sync_cons(struct arm_smmu_queue *q) |
| 693 | { |
| 694 | q->cons = readl_relaxed(q->cons_reg); |
| 695 | } |
| 696 | |
| 697 | static void queue_inc_cons(struct arm_smmu_queue *q) |
| 698 | { |
| 699 | u32 cons = (Q_WRP(q, q->cons) | Q_IDX(q, q->cons)) + 1; |
| 700 | |
| 701 | q->cons = Q_OVF(q, q->cons) | Q_WRP(q, cons) | Q_IDX(q, cons); |
| 702 | writel(q->cons, q->cons_reg); |
| 703 | } |
| 704 | |
| 705 | static int queue_sync_prod(struct arm_smmu_queue *q) |
| 706 | { |
| 707 | int ret = 0; |
| 708 | u32 prod = readl_relaxed(q->prod_reg); |
| 709 | |
| 710 | if (Q_OVF(q, prod) != Q_OVF(q, q->prod)) |
| 711 | ret = -EOVERFLOW; |
| 712 | |
| 713 | q->prod = prod; |
| 714 | return ret; |
| 715 | } |
| 716 | |
| 717 | static void queue_inc_prod(struct arm_smmu_queue *q) |
| 718 | { |
| 719 | u32 prod = (Q_WRP(q, q->prod) | Q_IDX(q, q->prod)) + 1; |
| 720 | |
| 721 | q->prod = Q_OVF(q, q->prod) | Q_WRP(q, prod) | Q_IDX(q, prod); |
| 722 | writel(q->prod, q->prod_reg); |
| 723 | } |
| 724 | |
Jean-Philippe Brucker | bcfced1 | 2016-09-05 14:09:53 +0100 | [diff] [blame] | 725 | /* |
| 726 | * Wait for the SMMU to consume items. If drain is true, wait until the queue |
| 727 | * is empty. Otherwise, wait until there is at least one free slot. |
| 728 | */ |
| 729 | static int queue_poll_cons(struct arm_smmu_queue *q, bool drain, bool wfe) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 730 | { |
| 731 | ktime_t timeout = ktime_add_us(ktime_get(), ARM_SMMU_POLL_TIMEOUT_US); |
| 732 | |
Jean-Philippe Brucker | bcfced1 | 2016-09-05 14:09:53 +0100 | [diff] [blame] | 733 | while (queue_sync_cons(q), (drain ? !queue_empty(q) : queue_full(q))) { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 734 | if (ktime_compare(ktime_get(), timeout) > 0) |
| 735 | return -ETIMEDOUT; |
| 736 | |
| 737 | if (wfe) { |
| 738 | wfe(); |
| 739 | } else { |
| 740 | cpu_relax(); |
| 741 | udelay(1); |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | return 0; |
| 746 | } |
| 747 | |
| 748 | static void queue_write(__le64 *dst, u64 *src, size_t n_dwords) |
| 749 | { |
| 750 | int i; |
| 751 | |
| 752 | for (i = 0; i < n_dwords; ++i) |
| 753 | *dst++ = cpu_to_le64(*src++); |
| 754 | } |
| 755 | |
| 756 | static int queue_insert_raw(struct arm_smmu_queue *q, u64 *ent) |
| 757 | { |
| 758 | if (queue_full(q)) |
| 759 | return -ENOSPC; |
| 760 | |
| 761 | queue_write(Q_ENT(q, q->prod), ent, q->ent_dwords); |
| 762 | queue_inc_prod(q); |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | static void queue_read(__le64 *dst, u64 *src, size_t n_dwords) |
| 767 | { |
| 768 | int i; |
| 769 | |
| 770 | for (i = 0; i < n_dwords; ++i) |
| 771 | *dst++ = le64_to_cpu(*src++); |
| 772 | } |
| 773 | |
| 774 | static int queue_remove_raw(struct arm_smmu_queue *q, u64 *ent) |
| 775 | { |
| 776 | if (queue_empty(q)) |
| 777 | return -EAGAIN; |
| 778 | |
| 779 | queue_read(ent, Q_ENT(q, q->cons), q->ent_dwords); |
| 780 | queue_inc_cons(q); |
| 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | /* High-level queue accessors */ |
| 785 | static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent) |
| 786 | { |
| 787 | memset(cmd, 0, CMDQ_ENT_DWORDS << 3); |
| 788 | cmd[0] |= (ent->opcode & CMDQ_0_OP_MASK) << CMDQ_0_OP_SHIFT; |
| 789 | |
| 790 | switch (ent->opcode) { |
| 791 | case CMDQ_OP_TLBI_EL2_ALL: |
| 792 | case CMDQ_OP_TLBI_NSNH_ALL: |
| 793 | break; |
| 794 | case CMDQ_OP_PREFETCH_CFG: |
| 795 | cmd[0] |= (u64)ent->prefetch.sid << CMDQ_PREFETCH_0_SID_SHIFT; |
| 796 | cmd[1] |= ent->prefetch.size << CMDQ_PREFETCH_1_SIZE_SHIFT; |
| 797 | cmd[1] |= ent->prefetch.addr & CMDQ_PREFETCH_1_ADDR_MASK; |
| 798 | break; |
| 799 | case CMDQ_OP_CFGI_STE: |
| 800 | cmd[0] |= (u64)ent->cfgi.sid << CMDQ_CFGI_0_SID_SHIFT; |
| 801 | cmd[1] |= ent->cfgi.leaf ? CMDQ_CFGI_1_LEAF : 0; |
| 802 | break; |
| 803 | case CMDQ_OP_CFGI_ALL: |
| 804 | /* Cover the entire SID range */ |
| 805 | cmd[1] |= CMDQ_CFGI_1_RANGE_MASK << CMDQ_CFGI_1_RANGE_SHIFT; |
| 806 | break; |
| 807 | case CMDQ_OP_TLBI_NH_VA: |
| 808 | cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT; |
Will Deacon | 1c27df1 | 2015-09-18 16:12:56 +0100 | [diff] [blame] | 809 | cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0; |
| 810 | cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_VA_MASK; |
| 811 | break; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 812 | case CMDQ_OP_TLBI_S2_IPA: |
| 813 | cmd[0] |= (u64)ent->tlbi.vmid << CMDQ_TLBI_0_VMID_SHIFT; |
| 814 | cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0; |
Will Deacon | 1c27df1 | 2015-09-18 16:12:56 +0100 | [diff] [blame] | 815 | cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_IPA_MASK; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 816 | break; |
| 817 | case CMDQ_OP_TLBI_NH_ASID: |
| 818 | cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT; |
| 819 | /* Fallthrough */ |
| 820 | case CMDQ_OP_TLBI_S12_VMALL: |
| 821 | cmd[0] |= (u64)ent->tlbi.vmid << CMDQ_TLBI_0_VMID_SHIFT; |
| 822 | break; |
| 823 | case CMDQ_OP_PRI_RESP: |
| 824 | cmd[0] |= ent->substream_valid ? CMDQ_0_SSV : 0; |
| 825 | cmd[0] |= ent->pri.ssid << CMDQ_PRI_0_SSID_SHIFT; |
| 826 | cmd[0] |= (u64)ent->pri.sid << CMDQ_PRI_0_SID_SHIFT; |
| 827 | cmd[1] |= ent->pri.grpid << CMDQ_PRI_1_GRPID_SHIFT; |
| 828 | switch (ent->pri.resp) { |
| 829 | case PRI_RESP_DENY: |
| 830 | cmd[1] |= CMDQ_PRI_1_RESP_DENY; |
| 831 | break; |
| 832 | case PRI_RESP_FAIL: |
| 833 | cmd[1] |= CMDQ_PRI_1_RESP_FAIL; |
| 834 | break; |
| 835 | case PRI_RESP_SUCC: |
| 836 | cmd[1] |= CMDQ_PRI_1_RESP_SUCC; |
| 837 | break; |
| 838 | default: |
| 839 | return -EINVAL; |
| 840 | } |
| 841 | break; |
| 842 | case CMDQ_OP_CMD_SYNC: |
| 843 | cmd[0] |= CMDQ_SYNC_0_CS_SEV; |
| 844 | break; |
| 845 | default: |
| 846 | return -ENOENT; |
| 847 | } |
| 848 | |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static void arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu) |
| 853 | { |
| 854 | static const char *cerror_str[] = { |
| 855 | [CMDQ_ERR_CERROR_NONE_IDX] = "No error", |
| 856 | [CMDQ_ERR_CERROR_ILL_IDX] = "Illegal command", |
| 857 | [CMDQ_ERR_CERROR_ABT_IDX] = "Abort on command fetch", |
| 858 | }; |
| 859 | |
| 860 | int i; |
| 861 | u64 cmd[CMDQ_ENT_DWORDS]; |
| 862 | struct arm_smmu_queue *q = &smmu->cmdq.q; |
| 863 | u32 cons = readl_relaxed(q->cons_reg); |
| 864 | u32 idx = cons >> CMDQ_ERR_SHIFT & CMDQ_ERR_MASK; |
| 865 | struct arm_smmu_cmdq_ent cmd_sync = { |
| 866 | .opcode = CMDQ_OP_CMD_SYNC, |
| 867 | }; |
| 868 | |
| 869 | dev_err(smmu->dev, "CMDQ error (cons 0x%08x): %s\n", cons, |
Will Deacon | a0d5c04 | 2015-12-04 12:00:29 +0000 | [diff] [blame] | 870 | idx < ARRAY_SIZE(cerror_str) ? cerror_str[idx] : "Unknown"); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 871 | |
| 872 | switch (idx) { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 873 | case CMDQ_ERR_CERROR_ABT_IDX: |
| 874 | dev_err(smmu->dev, "retrying command fetch\n"); |
| 875 | case CMDQ_ERR_CERROR_NONE_IDX: |
| 876 | return; |
Will Deacon | a0d5c04 | 2015-12-04 12:00:29 +0000 | [diff] [blame] | 877 | case CMDQ_ERR_CERROR_ILL_IDX: |
| 878 | /* Fallthrough */ |
| 879 | default: |
| 880 | break; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | /* |
| 884 | * We may have concurrent producers, so we need to be careful |
| 885 | * not to touch any of the shadow cmdq state. |
| 886 | */ |
Will Deacon | aea2037 | 2016-07-29 11:15:37 +0100 | [diff] [blame] | 887 | queue_read(cmd, Q_ENT(q, cons), q->ent_dwords); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 888 | dev_err(smmu->dev, "skipping command in error state:\n"); |
| 889 | for (i = 0; i < ARRAY_SIZE(cmd); ++i) |
| 890 | dev_err(smmu->dev, "\t0x%016llx\n", (unsigned long long)cmd[i]); |
| 891 | |
| 892 | /* Convert the erroneous command into a CMD_SYNC */ |
| 893 | if (arm_smmu_cmdq_build_cmd(cmd, &cmd_sync)) { |
| 894 | dev_err(smmu->dev, "failed to convert to CMD_SYNC\n"); |
| 895 | return; |
| 896 | } |
| 897 | |
Will Deacon | aea2037 | 2016-07-29 11:15:37 +0100 | [diff] [blame] | 898 | queue_write(Q_ENT(q, cons), cmd, q->ent_dwords); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 899 | } |
| 900 | |
| 901 | static void arm_smmu_cmdq_issue_cmd(struct arm_smmu_device *smmu, |
| 902 | struct arm_smmu_cmdq_ent *ent) |
| 903 | { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 904 | u64 cmd[CMDQ_ENT_DWORDS]; |
Will Deacon | 8ded290 | 2016-09-09 14:33:59 +0100 | [diff] [blame] | 905 | unsigned long flags; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 906 | bool wfe = !!(smmu->features & ARM_SMMU_FEAT_SEV); |
| 907 | struct arm_smmu_queue *q = &smmu->cmdq.q; |
| 908 | |
| 909 | if (arm_smmu_cmdq_build_cmd(cmd, ent)) { |
| 910 | dev_warn(smmu->dev, "ignoring unknown CMDQ opcode 0x%x\n", |
| 911 | ent->opcode); |
| 912 | return; |
| 913 | } |
| 914 | |
Will Deacon | 8ded290 | 2016-09-09 14:33:59 +0100 | [diff] [blame] | 915 | spin_lock_irqsave(&smmu->cmdq.lock, flags); |
Jean-Philippe Brucker | bcfced1 | 2016-09-05 14:09:53 +0100 | [diff] [blame] | 916 | while (queue_insert_raw(q, cmd) == -ENOSPC) { |
| 917 | if (queue_poll_cons(q, false, wfe)) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 918 | dev_err_ratelimited(smmu->dev, "CMDQ timeout\n"); |
| 919 | } |
| 920 | |
Jean-Philippe Brucker | bcfced1 | 2016-09-05 14:09:53 +0100 | [diff] [blame] | 921 | if (ent->opcode == CMDQ_OP_CMD_SYNC && queue_poll_cons(q, true, wfe)) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 922 | dev_err_ratelimited(smmu->dev, "CMD_SYNC timeout\n"); |
Will Deacon | 8ded290 | 2016-09-09 14:33:59 +0100 | [diff] [blame] | 923 | spin_unlock_irqrestore(&smmu->cmdq.lock, flags); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | /* Context descriptor manipulation functions */ |
| 927 | static u64 arm_smmu_cpu_tcr_to_cd(u64 tcr) |
| 928 | { |
| 929 | u64 val = 0; |
| 930 | |
| 931 | /* Repack the TCR. Just care about TTBR0 for now */ |
| 932 | val |= ARM_SMMU_TCR2CD(tcr, T0SZ); |
| 933 | val |= ARM_SMMU_TCR2CD(tcr, TG0); |
| 934 | val |= ARM_SMMU_TCR2CD(tcr, IRGN0); |
| 935 | val |= ARM_SMMU_TCR2CD(tcr, ORGN0); |
| 936 | val |= ARM_SMMU_TCR2CD(tcr, SH0); |
| 937 | val |= ARM_SMMU_TCR2CD(tcr, EPD0); |
| 938 | val |= ARM_SMMU_TCR2CD(tcr, EPD1); |
| 939 | val |= ARM_SMMU_TCR2CD(tcr, IPS); |
| 940 | val |= ARM_SMMU_TCR2CD(tcr, TBI0); |
| 941 | |
| 942 | return val; |
| 943 | } |
| 944 | |
| 945 | static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu, |
| 946 | struct arm_smmu_s1_cfg *cfg) |
| 947 | { |
| 948 | u64 val; |
| 949 | |
| 950 | /* |
| 951 | * We don't need to issue any invalidation here, as we'll invalidate |
| 952 | * the STE when installing the new entry anyway. |
| 953 | */ |
| 954 | val = arm_smmu_cpu_tcr_to_cd(cfg->cd.tcr) | |
| 955 | #ifdef __BIG_ENDIAN |
| 956 | CTXDESC_CD_0_ENDI | |
| 957 | #endif |
| 958 | CTXDESC_CD_0_R | CTXDESC_CD_0_A | CTXDESC_CD_0_ASET_PRIVATE | |
| 959 | CTXDESC_CD_0_AA64 | (u64)cfg->cd.asid << CTXDESC_CD_0_ASID_SHIFT | |
| 960 | CTXDESC_CD_0_V; |
| 961 | cfg->cdptr[0] = cpu_to_le64(val); |
| 962 | |
| 963 | val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK << CTXDESC_CD_1_TTB0_SHIFT; |
| 964 | cfg->cdptr[1] = cpu_to_le64(val); |
| 965 | |
| 966 | cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair << CTXDESC_CD_3_MAIR_SHIFT); |
| 967 | } |
| 968 | |
| 969 | /* Stream table manipulation functions */ |
| 970 | static void |
| 971 | arm_smmu_write_strtab_l1_desc(__le64 *dst, struct arm_smmu_strtab_l1_desc *desc) |
| 972 | { |
| 973 | u64 val = 0; |
| 974 | |
| 975 | val |= (desc->span & STRTAB_L1_DESC_SPAN_MASK) |
| 976 | << STRTAB_L1_DESC_SPAN_SHIFT; |
| 977 | val |= desc->l2ptr_dma & |
| 978 | STRTAB_L1_DESC_L2PTR_MASK << STRTAB_L1_DESC_L2PTR_SHIFT; |
| 979 | |
| 980 | *dst = cpu_to_le64(val); |
| 981 | } |
| 982 | |
| 983 | static void arm_smmu_sync_ste_for_sid(struct arm_smmu_device *smmu, u32 sid) |
| 984 | { |
| 985 | struct arm_smmu_cmdq_ent cmd = { |
| 986 | .opcode = CMDQ_OP_CFGI_STE, |
| 987 | .cfgi = { |
| 988 | .sid = sid, |
| 989 | .leaf = true, |
| 990 | }, |
| 991 | }; |
| 992 | |
| 993 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 994 | cmd.opcode = CMDQ_OP_CMD_SYNC; |
| 995 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 996 | } |
| 997 | |
| 998 | static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid, |
| 999 | __le64 *dst, struct arm_smmu_strtab_ent *ste) |
| 1000 | { |
| 1001 | /* |
| 1002 | * This is hideously complicated, but we only really care about |
| 1003 | * three cases at the moment: |
| 1004 | * |
| 1005 | * 1. Invalid (all zero) -> bypass (init) |
| 1006 | * 2. Bypass -> translation (attach) |
| 1007 | * 3. Translation -> bypass (detach) |
| 1008 | * |
| 1009 | * Given that we can't update the STE atomically and the SMMU |
| 1010 | * doesn't read the thing in a defined order, that leaves us |
| 1011 | * with the following maintenance requirements: |
| 1012 | * |
| 1013 | * 1. Update Config, return (init time STEs aren't live) |
| 1014 | * 2. Write everything apart from dword 0, sync, write dword 0, sync |
| 1015 | * 3. Update Config, sync |
| 1016 | */ |
| 1017 | u64 val = le64_to_cpu(dst[0]); |
| 1018 | bool ste_live = false; |
| 1019 | struct arm_smmu_cmdq_ent prefetch_cmd = { |
| 1020 | .opcode = CMDQ_OP_PREFETCH_CFG, |
| 1021 | .prefetch = { |
| 1022 | .sid = sid, |
| 1023 | }, |
| 1024 | }; |
| 1025 | |
| 1026 | if (val & STRTAB_STE_0_V) { |
| 1027 | u64 cfg; |
| 1028 | |
| 1029 | cfg = val & STRTAB_STE_0_CFG_MASK << STRTAB_STE_0_CFG_SHIFT; |
| 1030 | switch (cfg) { |
| 1031 | case STRTAB_STE_0_CFG_BYPASS: |
| 1032 | break; |
| 1033 | case STRTAB_STE_0_CFG_S1_TRANS: |
| 1034 | case STRTAB_STE_0_CFG_S2_TRANS: |
| 1035 | ste_live = true; |
| 1036 | break; |
Will Deacon | 5bc0a11 | 2016-08-16 14:29:16 +0100 | [diff] [blame] | 1037 | case STRTAB_STE_0_CFG_ABORT: |
| 1038 | if (disable_bypass) |
| 1039 | break; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1040 | default: |
| 1041 | BUG(); /* STE corruption */ |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | /* Nuke the existing Config, as we're going to rewrite it */ |
| 1046 | val &= ~(STRTAB_STE_0_CFG_MASK << STRTAB_STE_0_CFG_SHIFT); |
| 1047 | |
| 1048 | if (ste->valid) |
| 1049 | val |= STRTAB_STE_0_V; |
| 1050 | else |
| 1051 | val &= ~STRTAB_STE_0_V; |
| 1052 | |
| 1053 | if (ste->bypass) { |
| 1054 | val |= disable_bypass ? STRTAB_STE_0_CFG_ABORT |
| 1055 | : STRTAB_STE_0_CFG_BYPASS; |
| 1056 | dst[0] = cpu_to_le64(val); |
Will Deacon | a0eacd8 | 2015-11-18 18:15:51 +0000 | [diff] [blame] | 1057 | dst[1] = cpu_to_le64(STRTAB_STE_1_SHCFG_INCOMING |
| 1058 | << STRTAB_STE_1_SHCFG_SHIFT); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1059 | dst[2] = 0; /* Nuke the VMID */ |
| 1060 | if (ste_live) |
| 1061 | arm_smmu_sync_ste_for_sid(smmu, sid); |
| 1062 | return; |
| 1063 | } |
| 1064 | |
| 1065 | if (ste->s1_cfg) { |
| 1066 | BUG_ON(ste_live); |
| 1067 | dst[1] = cpu_to_le64( |
| 1068 | STRTAB_STE_1_S1C_CACHE_WBRA |
| 1069 | << STRTAB_STE_1_S1CIR_SHIFT | |
| 1070 | STRTAB_STE_1_S1C_CACHE_WBRA |
| 1071 | << STRTAB_STE_1_S1COR_SHIFT | |
| 1072 | STRTAB_STE_1_S1C_SH_ISH << STRTAB_STE_1_S1CSH_SHIFT | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1073 | #ifdef CONFIG_PCI_ATS |
| 1074 | STRTAB_STE_1_EATS_TRANS << STRTAB_STE_1_EATS_SHIFT | |
| 1075 | #endif |
Robin Murphy | 95fa99a | 2016-09-12 17:13:47 +0100 | [diff] [blame] | 1076 | STRTAB_STE_1_STRW_NSEL1 << STRTAB_STE_1_STRW_SHIFT | |
| 1077 | STRTAB_STE_1_PRIVCFG_UNPRIV << |
| 1078 | STRTAB_STE_1_PRIVCFG_SHIFT); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1079 | |
Prem Mallappa | 6380be0 | 2015-12-14 22:01:23 +0530 | [diff] [blame] | 1080 | if (smmu->features & ARM_SMMU_FEAT_STALLS) |
| 1081 | dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD); |
| 1082 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1083 | val |= (ste->s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK |
| 1084 | << STRTAB_STE_0_S1CTXPTR_SHIFT) | |
| 1085 | STRTAB_STE_0_CFG_S1_TRANS; |
| 1086 | |
| 1087 | } |
| 1088 | |
| 1089 | if (ste->s2_cfg) { |
| 1090 | BUG_ON(ste_live); |
| 1091 | dst[2] = cpu_to_le64( |
| 1092 | ste->s2_cfg->vmid << STRTAB_STE_2_S2VMID_SHIFT | |
| 1093 | (ste->s2_cfg->vtcr & STRTAB_STE_2_VTCR_MASK) |
| 1094 | << STRTAB_STE_2_VTCR_SHIFT | |
| 1095 | #ifdef __BIG_ENDIAN |
| 1096 | STRTAB_STE_2_S2ENDI | |
| 1097 | #endif |
| 1098 | STRTAB_STE_2_S2PTW | STRTAB_STE_2_S2AA64 | |
| 1099 | STRTAB_STE_2_S2R); |
| 1100 | |
| 1101 | dst[3] = cpu_to_le64(ste->s2_cfg->vttbr & |
| 1102 | STRTAB_STE_3_S2TTB_MASK << STRTAB_STE_3_S2TTB_SHIFT); |
| 1103 | |
| 1104 | val |= STRTAB_STE_0_CFG_S2_TRANS; |
| 1105 | } |
| 1106 | |
| 1107 | arm_smmu_sync_ste_for_sid(smmu, sid); |
| 1108 | dst[0] = cpu_to_le64(val); |
| 1109 | arm_smmu_sync_ste_for_sid(smmu, sid); |
| 1110 | |
| 1111 | /* It's likely that we'll want to use the new STE soon */ |
Zhen Lei | 5e92946 | 2015-07-07 04:30:18 +0100 | [diff] [blame] | 1112 | if (!(smmu->options & ARM_SMMU_OPT_SKIP_PREFETCH)) |
| 1113 | arm_smmu_cmdq_issue_cmd(smmu, &prefetch_cmd); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | static void arm_smmu_init_bypass_stes(u64 *strtab, unsigned int nent) |
| 1117 | { |
| 1118 | unsigned int i; |
| 1119 | struct arm_smmu_strtab_ent ste = { |
| 1120 | .valid = true, |
| 1121 | .bypass = true, |
| 1122 | }; |
| 1123 | |
| 1124 | for (i = 0; i < nent; ++i) { |
| 1125 | arm_smmu_write_strtab_ent(NULL, -1, strtab, &ste); |
| 1126 | strtab += STRTAB_STE_DWORDS; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | static int arm_smmu_init_l2_strtab(struct arm_smmu_device *smmu, u32 sid) |
| 1131 | { |
| 1132 | size_t size; |
| 1133 | void *strtab; |
| 1134 | struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; |
| 1135 | struct arm_smmu_strtab_l1_desc *desc = &cfg->l1_desc[sid >> STRTAB_SPLIT]; |
| 1136 | |
| 1137 | if (desc->l2ptr) |
| 1138 | return 0; |
| 1139 | |
| 1140 | size = 1 << (STRTAB_SPLIT + ilog2(STRTAB_STE_DWORDS) + 3); |
Zhen Lei | 69146e7 | 2015-06-26 09:32:58 +0100 | [diff] [blame] | 1141 | strtab = &cfg->strtab[(sid >> STRTAB_SPLIT) * STRTAB_L1_DESC_DWORDS]; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1142 | |
| 1143 | desc->span = STRTAB_SPLIT + 1; |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1144 | desc->l2ptr = dmam_alloc_coherent(smmu->dev, size, &desc->l2ptr_dma, |
| 1145 | GFP_KERNEL | __GFP_ZERO); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1146 | if (!desc->l2ptr) { |
| 1147 | dev_err(smmu->dev, |
| 1148 | "failed to allocate l2 stream table for SID %u\n", |
| 1149 | sid); |
| 1150 | return -ENOMEM; |
| 1151 | } |
| 1152 | |
| 1153 | arm_smmu_init_bypass_stes(desc->l2ptr, 1 << STRTAB_SPLIT); |
| 1154 | arm_smmu_write_strtab_l1_desc(strtab, desc); |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | /* IRQ and event handlers */ |
| 1159 | static irqreturn_t arm_smmu_evtq_thread(int irq, void *dev) |
| 1160 | { |
| 1161 | int i; |
| 1162 | struct arm_smmu_device *smmu = dev; |
| 1163 | struct arm_smmu_queue *q = &smmu->evtq.q; |
| 1164 | u64 evt[EVTQ_ENT_DWORDS]; |
| 1165 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1166 | do { |
| 1167 | while (!queue_remove_raw(q, evt)) { |
| 1168 | u8 id = evt[0] >> EVTQ_0_ID_SHIFT & EVTQ_0_ID_MASK; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1169 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1170 | dev_info(smmu->dev, "event 0x%02x received:\n", id); |
| 1171 | for (i = 0; i < ARRAY_SIZE(evt); ++i) |
| 1172 | dev_info(smmu->dev, "\t0x%016llx\n", |
| 1173 | (unsigned long long)evt[i]); |
| 1174 | |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * Not much we can do on overflow, so scream and pretend we're |
| 1179 | * trying harder. |
| 1180 | */ |
| 1181 | if (queue_sync_prod(q) == -EOVERFLOW) |
| 1182 | dev_err(smmu->dev, "EVTQ overflow detected -- events lost\n"); |
| 1183 | } while (!queue_empty(q)); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1184 | |
| 1185 | /* Sync our overflow flag, as we believe we're up to speed */ |
| 1186 | q->cons = Q_OVF(q, q->prod) | Q_WRP(q, q->cons) | Q_IDX(q, q->cons); |
| 1187 | return IRQ_HANDLED; |
| 1188 | } |
| 1189 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1190 | static void arm_smmu_handle_ppr(struct arm_smmu_device *smmu, u64 *evt) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1191 | { |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1192 | u32 sid, ssid; |
| 1193 | u16 grpid; |
| 1194 | bool ssv, last; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1195 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1196 | sid = evt[0] >> PRIQ_0_SID_SHIFT & PRIQ_0_SID_MASK; |
| 1197 | ssv = evt[0] & PRIQ_0_SSID_V; |
| 1198 | ssid = ssv ? evt[0] >> PRIQ_0_SSID_SHIFT & PRIQ_0_SSID_MASK : 0; |
| 1199 | last = evt[0] & PRIQ_0_PRG_LAST; |
| 1200 | grpid = evt[1] >> PRIQ_1_PRG_IDX_SHIFT & PRIQ_1_PRG_IDX_MASK; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1201 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1202 | dev_info(smmu->dev, "unexpected PRI request received:\n"); |
| 1203 | dev_info(smmu->dev, |
| 1204 | "\tsid 0x%08x.0x%05x: [%u%s] %sprivileged %s%s%s access at iova 0x%016llx\n", |
| 1205 | sid, ssid, grpid, last ? "L" : "", |
| 1206 | evt[0] & PRIQ_0_PERM_PRIV ? "" : "un", |
| 1207 | evt[0] & PRIQ_0_PERM_READ ? "R" : "", |
| 1208 | evt[0] & PRIQ_0_PERM_WRITE ? "W" : "", |
| 1209 | evt[0] & PRIQ_0_PERM_EXEC ? "X" : "", |
| 1210 | evt[1] & PRIQ_1_ADDR_MASK << PRIQ_1_ADDR_SHIFT); |
| 1211 | |
| 1212 | if (last) { |
| 1213 | struct arm_smmu_cmdq_ent cmd = { |
| 1214 | .opcode = CMDQ_OP_PRI_RESP, |
| 1215 | .substream_valid = ssv, |
| 1216 | .pri = { |
| 1217 | .sid = sid, |
| 1218 | .ssid = ssid, |
| 1219 | .grpid = grpid, |
| 1220 | .resp = PRI_RESP_DENY, |
| 1221 | }, |
| 1222 | }; |
| 1223 | |
| 1224 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 1225 | } |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | static irqreturn_t arm_smmu_priq_thread(int irq, void *dev) |
| 1229 | { |
| 1230 | struct arm_smmu_device *smmu = dev; |
| 1231 | struct arm_smmu_queue *q = &smmu->priq.q; |
| 1232 | u64 evt[PRIQ_ENT_DWORDS]; |
| 1233 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1234 | do { |
| 1235 | while (!queue_remove_raw(q, evt)) |
| 1236 | arm_smmu_handle_ppr(smmu, evt); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1237 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1238 | if (queue_sync_prod(q) == -EOVERFLOW) |
| 1239 | dev_err(smmu->dev, "PRIQ overflow detected -- requests lost\n"); |
| 1240 | } while (!queue_empty(q)); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1241 | |
| 1242 | /* Sync our overflow flag, as we believe we're up to speed */ |
| 1243 | q->cons = Q_OVF(q, q->prod) | Q_WRP(q, q->cons) | Q_IDX(q, q->cons); |
| 1244 | return IRQ_HANDLED; |
| 1245 | } |
| 1246 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1247 | static irqreturn_t arm_smmu_cmdq_sync_handler(int irq, void *dev) |
| 1248 | { |
| 1249 | /* We don't actually use CMD_SYNC interrupts for anything */ |
| 1250 | return IRQ_HANDLED; |
| 1251 | } |
| 1252 | |
| 1253 | static int arm_smmu_device_disable(struct arm_smmu_device *smmu); |
| 1254 | |
| 1255 | static irqreturn_t arm_smmu_gerror_handler(int irq, void *dev) |
| 1256 | { |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1257 | u32 gerror, gerrorn, active; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1258 | struct arm_smmu_device *smmu = dev; |
| 1259 | |
| 1260 | gerror = readl_relaxed(smmu->base + ARM_SMMU_GERROR); |
| 1261 | gerrorn = readl_relaxed(smmu->base + ARM_SMMU_GERRORN); |
| 1262 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1263 | active = gerror ^ gerrorn; |
| 1264 | if (!(active & GERROR_ERR_MASK)) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1265 | return IRQ_NONE; /* No errors pending */ |
| 1266 | |
| 1267 | dev_warn(smmu->dev, |
| 1268 | "unexpected global error reported (0x%08x), this could be serious\n", |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1269 | active); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1270 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1271 | if (active & GERROR_SFM_ERR) { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1272 | dev_err(smmu->dev, "device has entered Service Failure Mode!\n"); |
| 1273 | arm_smmu_device_disable(smmu); |
| 1274 | } |
| 1275 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1276 | if (active & GERROR_MSI_GERROR_ABT_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1277 | dev_warn(smmu->dev, "GERROR MSI write aborted\n"); |
| 1278 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1279 | if (active & GERROR_MSI_PRIQ_ABT_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1280 | dev_warn(smmu->dev, "PRIQ MSI write aborted\n"); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1281 | |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 1282 | if (active & GERROR_MSI_EVTQ_ABT_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1283 | dev_warn(smmu->dev, "EVTQ MSI write aborted\n"); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1284 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1285 | if (active & GERROR_MSI_CMDQ_ABT_ERR) { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1286 | dev_warn(smmu->dev, "CMDQ MSI write aborted\n"); |
| 1287 | arm_smmu_cmdq_sync_handler(irq, smmu->dev); |
| 1288 | } |
| 1289 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1290 | if (active & GERROR_PRIQ_ABT_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1291 | dev_err(smmu->dev, "PRIQ write aborted -- events may have been lost\n"); |
| 1292 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1293 | if (active & GERROR_EVTQ_ABT_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1294 | dev_err(smmu->dev, "EVTQ write aborted -- events may have been lost\n"); |
| 1295 | |
Prem Mallappa | 324ba10 | 2015-12-14 22:01:14 +0530 | [diff] [blame] | 1296 | if (active & GERROR_CMDQ_ERR) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1297 | arm_smmu_cmdq_skip_err(smmu); |
| 1298 | |
| 1299 | writel(gerror, smmu->base + ARM_SMMU_GERRORN); |
| 1300 | return IRQ_HANDLED; |
| 1301 | } |
| 1302 | |
| 1303 | /* IO_PGTABLE API */ |
| 1304 | static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu) |
| 1305 | { |
| 1306 | struct arm_smmu_cmdq_ent cmd; |
| 1307 | |
| 1308 | cmd.opcode = CMDQ_OP_CMD_SYNC; |
| 1309 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 1310 | } |
| 1311 | |
| 1312 | static void arm_smmu_tlb_sync(void *cookie) |
| 1313 | { |
| 1314 | struct arm_smmu_domain *smmu_domain = cookie; |
| 1315 | __arm_smmu_tlb_sync(smmu_domain->smmu); |
| 1316 | } |
| 1317 | |
| 1318 | static void arm_smmu_tlb_inv_context(void *cookie) |
| 1319 | { |
| 1320 | struct arm_smmu_domain *smmu_domain = cookie; |
| 1321 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1322 | struct arm_smmu_cmdq_ent cmd; |
| 1323 | |
| 1324 | if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) { |
| 1325 | cmd.opcode = CMDQ_OP_TLBI_NH_ASID; |
| 1326 | cmd.tlbi.asid = smmu_domain->s1_cfg.cd.asid; |
| 1327 | cmd.tlbi.vmid = 0; |
| 1328 | } else { |
| 1329 | cmd.opcode = CMDQ_OP_TLBI_S12_VMALL; |
| 1330 | cmd.tlbi.vmid = smmu_domain->s2_cfg.vmid; |
| 1331 | } |
| 1332 | |
| 1333 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 1334 | __arm_smmu_tlb_sync(smmu); |
| 1335 | } |
| 1336 | |
| 1337 | static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size, |
Robin Murphy | 06c610e | 2015-12-07 18:18:53 +0000 | [diff] [blame] | 1338 | size_t granule, bool leaf, void *cookie) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1339 | { |
| 1340 | struct arm_smmu_domain *smmu_domain = cookie; |
| 1341 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1342 | struct arm_smmu_cmdq_ent cmd = { |
| 1343 | .tlbi = { |
| 1344 | .leaf = leaf, |
| 1345 | .addr = iova, |
| 1346 | }, |
| 1347 | }; |
| 1348 | |
| 1349 | if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) { |
| 1350 | cmd.opcode = CMDQ_OP_TLBI_NH_VA; |
| 1351 | cmd.tlbi.asid = smmu_domain->s1_cfg.cd.asid; |
| 1352 | } else { |
| 1353 | cmd.opcode = CMDQ_OP_TLBI_S2_IPA; |
| 1354 | cmd.tlbi.vmid = smmu_domain->s2_cfg.vmid; |
| 1355 | } |
| 1356 | |
Robin Murphy | 75df138 | 2015-12-07 18:18:52 +0000 | [diff] [blame] | 1357 | do { |
| 1358 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 1359 | cmd.tlbi.addr += granule; |
| 1360 | } while (size -= granule); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1361 | } |
| 1362 | |
Bhumika Goyal | ca297aa | 2016-10-25 23:36:11 +0530 | [diff] [blame] | 1363 | static const struct iommu_gather_ops arm_smmu_gather_ops = { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1364 | .tlb_flush_all = arm_smmu_tlb_inv_context, |
| 1365 | .tlb_add_flush = arm_smmu_tlb_inv_range_nosync, |
| 1366 | .tlb_sync = arm_smmu_tlb_sync, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1367 | }; |
| 1368 | |
| 1369 | /* IOMMU API */ |
| 1370 | static bool arm_smmu_capable(enum iommu_cap cap) |
| 1371 | { |
| 1372 | switch (cap) { |
| 1373 | case IOMMU_CAP_CACHE_COHERENCY: |
| 1374 | return true; |
| 1375 | case IOMMU_CAP_INTR_REMAP: |
| 1376 | return true; /* MSIs are just memory writes */ |
| 1377 | case IOMMU_CAP_NOEXEC: |
| 1378 | return true; |
| 1379 | default: |
| 1380 | return false; |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) |
| 1385 | { |
| 1386 | struct arm_smmu_domain *smmu_domain; |
| 1387 | |
Robin Murphy | 9adb959 | 2016-01-26 18:06:36 +0000 | [diff] [blame] | 1388 | if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1389 | return NULL; |
| 1390 | |
| 1391 | /* |
| 1392 | * Allocate the domain and initialise some of its data structures. |
| 1393 | * We can't really do anything meaningful until we've added a |
| 1394 | * master. |
| 1395 | */ |
| 1396 | smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL); |
| 1397 | if (!smmu_domain) |
| 1398 | return NULL; |
| 1399 | |
Robin Murphy | 9adb959 | 2016-01-26 18:06:36 +0000 | [diff] [blame] | 1400 | if (type == IOMMU_DOMAIN_DMA && |
| 1401 | iommu_get_dma_cookie(&smmu_domain->domain)) { |
| 1402 | kfree(smmu_domain); |
| 1403 | return NULL; |
| 1404 | } |
| 1405 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1406 | mutex_init(&smmu_domain->init_mutex); |
| 1407 | spin_lock_init(&smmu_domain->pgtbl_lock); |
| 1408 | return &smmu_domain->domain; |
| 1409 | } |
| 1410 | |
| 1411 | static int arm_smmu_bitmap_alloc(unsigned long *map, int span) |
| 1412 | { |
| 1413 | int idx, size = 1 << span; |
| 1414 | |
| 1415 | do { |
| 1416 | idx = find_first_zero_bit(map, size); |
| 1417 | if (idx == size) |
| 1418 | return -ENOSPC; |
| 1419 | } while (test_and_set_bit(idx, map)); |
| 1420 | |
| 1421 | return idx; |
| 1422 | } |
| 1423 | |
| 1424 | static void arm_smmu_bitmap_free(unsigned long *map, int idx) |
| 1425 | { |
| 1426 | clear_bit(idx, map); |
| 1427 | } |
| 1428 | |
| 1429 | static void arm_smmu_domain_free(struct iommu_domain *domain) |
| 1430 | { |
| 1431 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1432 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1433 | |
Robin Murphy | 9adb959 | 2016-01-26 18:06:36 +0000 | [diff] [blame] | 1434 | iommu_put_dma_cookie(domain); |
Markus Elfring | a6e08fb | 2015-06-29 17:47:43 +0100 | [diff] [blame] | 1435 | free_io_pgtable_ops(smmu_domain->pgtbl_ops); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1436 | |
| 1437 | /* Free the CD and ASID, if we allocated them */ |
| 1438 | if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) { |
| 1439 | struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg; |
| 1440 | |
| 1441 | if (cfg->cdptr) { |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1442 | dmam_free_coherent(smmu_domain->smmu->dev, |
| 1443 | CTXDESC_CD_DWORDS << 3, |
| 1444 | cfg->cdptr, |
| 1445 | cfg->cdptr_dma); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1446 | |
| 1447 | arm_smmu_bitmap_free(smmu->asid_map, cfg->cd.asid); |
| 1448 | } |
| 1449 | } else { |
| 1450 | struct arm_smmu_s2_cfg *cfg = &smmu_domain->s2_cfg; |
| 1451 | if (cfg->vmid) |
| 1452 | arm_smmu_bitmap_free(smmu->vmid_map, cfg->vmid); |
| 1453 | } |
| 1454 | |
| 1455 | kfree(smmu_domain); |
| 1456 | } |
| 1457 | |
| 1458 | static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain, |
| 1459 | struct io_pgtable_cfg *pgtbl_cfg) |
| 1460 | { |
| 1461 | int ret; |
Will Deacon | c0733a2 | 2015-10-13 17:51:14 +0100 | [diff] [blame] | 1462 | int asid; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1463 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1464 | struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg; |
| 1465 | |
| 1466 | asid = arm_smmu_bitmap_alloc(smmu->asid_map, smmu->asid_bits); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 1467 | if (asid < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1468 | return asid; |
| 1469 | |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1470 | cfg->cdptr = dmam_alloc_coherent(smmu->dev, CTXDESC_CD_DWORDS << 3, |
| 1471 | &cfg->cdptr_dma, |
| 1472 | GFP_KERNEL | __GFP_ZERO); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1473 | if (!cfg->cdptr) { |
| 1474 | dev_warn(smmu->dev, "failed to allocate context descriptor\n"); |
Will Deacon | c0733a2 | 2015-10-13 17:51:14 +0100 | [diff] [blame] | 1475 | ret = -ENOMEM; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1476 | goto out_free_asid; |
| 1477 | } |
| 1478 | |
Will Deacon | c0733a2 | 2015-10-13 17:51:14 +0100 | [diff] [blame] | 1479 | cfg->cd.asid = (u16)asid; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1480 | cfg->cd.ttbr = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0]; |
| 1481 | cfg->cd.tcr = pgtbl_cfg->arm_lpae_s1_cfg.tcr; |
| 1482 | cfg->cd.mair = pgtbl_cfg->arm_lpae_s1_cfg.mair[0]; |
| 1483 | return 0; |
| 1484 | |
| 1485 | out_free_asid: |
| 1486 | arm_smmu_bitmap_free(smmu->asid_map, asid); |
| 1487 | return ret; |
| 1488 | } |
| 1489 | |
| 1490 | static int arm_smmu_domain_finalise_s2(struct arm_smmu_domain *smmu_domain, |
| 1491 | struct io_pgtable_cfg *pgtbl_cfg) |
| 1492 | { |
Will Deacon | c0733a2 | 2015-10-13 17:51:14 +0100 | [diff] [blame] | 1493 | int vmid; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1494 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1495 | struct arm_smmu_s2_cfg *cfg = &smmu_domain->s2_cfg; |
| 1496 | |
| 1497 | vmid = arm_smmu_bitmap_alloc(smmu->vmid_map, smmu->vmid_bits); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 1498 | if (vmid < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1499 | return vmid; |
| 1500 | |
Will Deacon | c0733a2 | 2015-10-13 17:51:14 +0100 | [diff] [blame] | 1501 | cfg->vmid = (u16)vmid; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1502 | cfg->vttbr = pgtbl_cfg->arm_lpae_s2_cfg.vttbr; |
| 1503 | cfg->vtcr = pgtbl_cfg->arm_lpae_s2_cfg.vtcr; |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1507 | static int arm_smmu_domain_finalise(struct iommu_domain *domain) |
| 1508 | { |
| 1509 | int ret; |
| 1510 | unsigned long ias, oas; |
| 1511 | enum io_pgtable_fmt fmt; |
| 1512 | struct io_pgtable_cfg pgtbl_cfg; |
| 1513 | struct io_pgtable_ops *pgtbl_ops; |
| 1514 | int (*finalise_stage_fn)(struct arm_smmu_domain *, |
| 1515 | struct io_pgtable_cfg *); |
| 1516 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1517 | struct arm_smmu_device *smmu = smmu_domain->smmu; |
| 1518 | |
| 1519 | /* Restrict the stage to what we can actually support */ |
| 1520 | if (!(smmu->features & ARM_SMMU_FEAT_TRANS_S1)) |
| 1521 | smmu_domain->stage = ARM_SMMU_DOMAIN_S2; |
| 1522 | if (!(smmu->features & ARM_SMMU_FEAT_TRANS_S2)) |
| 1523 | smmu_domain->stage = ARM_SMMU_DOMAIN_S1; |
| 1524 | |
| 1525 | switch (smmu_domain->stage) { |
| 1526 | case ARM_SMMU_DOMAIN_S1: |
| 1527 | ias = VA_BITS; |
| 1528 | oas = smmu->ias; |
| 1529 | fmt = ARM_64_LPAE_S1; |
| 1530 | finalise_stage_fn = arm_smmu_domain_finalise_s1; |
| 1531 | break; |
| 1532 | case ARM_SMMU_DOMAIN_NESTED: |
| 1533 | case ARM_SMMU_DOMAIN_S2: |
| 1534 | ias = smmu->ias; |
| 1535 | oas = smmu->oas; |
| 1536 | fmt = ARM_64_LPAE_S2; |
| 1537 | finalise_stage_fn = arm_smmu_domain_finalise_s2; |
| 1538 | break; |
| 1539 | default: |
| 1540 | return -EINVAL; |
| 1541 | } |
| 1542 | |
| 1543 | pgtbl_cfg = (struct io_pgtable_cfg) { |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 1544 | .pgsize_bitmap = smmu->pgsize_bitmap, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1545 | .ias = ias, |
| 1546 | .oas = oas, |
| 1547 | .tlb = &arm_smmu_gather_ops, |
Robin Murphy | bdc6d97 | 2015-07-29 19:46:07 +0100 | [diff] [blame] | 1548 | .iommu_dev = smmu->dev, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1549 | }; |
| 1550 | |
| 1551 | pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain); |
| 1552 | if (!pgtbl_ops) |
| 1553 | return -ENOMEM; |
| 1554 | |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 1555 | domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap; |
Robin Murphy | 455eb7d | 2016-09-12 17:13:58 +0100 | [diff] [blame] | 1556 | domain->geometry.aperture_end = (1UL << ias) - 1; |
| 1557 | domain->geometry.force_aperture = true; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1558 | smmu_domain->pgtbl_ops = pgtbl_ops; |
| 1559 | |
| 1560 | ret = finalise_stage_fn(smmu_domain, &pgtbl_cfg); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 1561 | if (ret < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1562 | free_io_pgtable_ops(pgtbl_ops); |
| 1563 | |
| 1564 | return ret; |
| 1565 | } |
| 1566 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1567 | static __le64 *arm_smmu_get_step_for_sid(struct arm_smmu_device *smmu, u32 sid) |
| 1568 | { |
| 1569 | __le64 *step; |
| 1570 | struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; |
| 1571 | |
| 1572 | if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { |
| 1573 | struct arm_smmu_strtab_l1_desc *l1_desc; |
| 1574 | int idx; |
| 1575 | |
| 1576 | /* Two-level walk */ |
| 1577 | idx = (sid >> STRTAB_SPLIT) * STRTAB_L1_DESC_DWORDS; |
| 1578 | l1_desc = &cfg->l1_desc[idx]; |
| 1579 | idx = (sid & ((1 << STRTAB_SPLIT) - 1)) * STRTAB_STE_DWORDS; |
| 1580 | step = &l1_desc->l2ptr[idx]; |
| 1581 | } else { |
| 1582 | /* Simple linear lookup */ |
| 1583 | step = &cfg->strtab[sid * STRTAB_STE_DWORDS]; |
| 1584 | } |
| 1585 | |
| 1586 | return step; |
| 1587 | } |
| 1588 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1589 | static int arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1590 | { |
| 1591 | int i; |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1592 | struct arm_smmu_master_data *master = fwspec->iommu_priv; |
| 1593 | struct arm_smmu_device *smmu = master->smmu; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1594 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1595 | for (i = 0; i < fwspec->num_ids; ++i) { |
| 1596 | u32 sid = fwspec->ids[i]; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1597 | __le64 *step = arm_smmu_get_step_for_sid(smmu, sid); |
| 1598 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1599 | arm_smmu_write_strtab_ent(smmu, sid, step, &master->ste); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1600 | } |
| 1601 | |
| 1602 | return 0; |
| 1603 | } |
| 1604 | |
Will Deacon | bc7f2ce | 2016-02-17 17:41:57 +0000 | [diff] [blame] | 1605 | static void arm_smmu_detach_dev(struct device *dev) |
| 1606 | { |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1607 | struct arm_smmu_master_data *master = dev->iommu_fwspec->iommu_priv; |
Will Deacon | bc7f2ce | 2016-02-17 17:41:57 +0000 | [diff] [blame] | 1608 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1609 | master->ste.bypass = true; |
| 1610 | if (arm_smmu_install_ste_for_dev(dev->iommu_fwspec) < 0) |
Will Deacon | bc7f2ce | 2016-02-17 17:41:57 +0000 | [diff] [blame] | 1611 | dev_warn(dev, "failed to install bypass STE\n"); |
Will Deacon | bc7f2ce | 2016-02-17 17:41:57 +0000 | [diff] [blame] | 1612 | } |
| 1613 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1614 | static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) |
| 1615 | { |
| 1616 | int ret = 0; |
| 1617 | struct arm_smmu_device *smmu; |
| 1618 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1619 | struct arm_smmu_master_data *master; |
| 1620 | struct arm_smmu_strtab_ent *ste; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1621 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1622 | if (!dev->iommu_fwspec) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1623 | return -ENOENT; |
| 1624 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1625 | master = dev->iommu_fwspec->iommu_priv; |
| 1626 | smmu = master->smmu; |
| 1627 | ste = &master->ste; |
| 1628 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1629 | /* Already attached to a different domain? */ |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1630 | if (!ste->bypass) |
Will Deacon | bc7f2ce | 2016-02-17 17:41:57 +0000 | [diff] [blame] | 1631 | arm_smmu_detach_dev(dev); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1632 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1633 | mutex_lock(&smmu_domain->init_mutex); |
| 1634 | |
| 1635 | if (!smmu_domain->smmu) { |
| 1636 | smmu_domain->smmu = smmu; |
| 1637 | ret = arm_smmu_domain_finalise(domain); |
| 1638 | if (ret) { |
| 1639 | smmu_domain->smmu = NULL; |
| 1640 | goto out_unlock; |
| 1641 | } |
| 1642 | } else if (smmu_domain->smmu != smmu) { |
| 1643 | dev_err(dev, |
| 1644 | "cannot attach to SMMU %s (upstream of %s)\n", |
| 1645 | dev_name(smmu_domain->smmu->dev), |
| 1646 | dev_name(smmu->dev)); |
| 1647 | ret = -ENXIO; |
| 1648 | goto out_unlock; |
| 1649 | } |
| 1650 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1651 | ste->bypass = false; |
| 1652 | ste->valid = true; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1653 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1654 | if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) { |
| 1655 | ste->s1_cfg = &smmu_domain->s1_cfg; |
| 1656 | ste->s2_cfg = NULL; |
| 1657 | arm_smmu_write_ctx_desc(smmu, ste->s1_cfg); |
| 1658 | } else { |
| 1659 | ste->s1_cfg = NULL; |
| 1660 | ste->s2_cfg = &smmu_domain->s2_cfg; |
| 1661 | } |
Will Deacon | cbf8277 | 2016-02-18 12:05:57 +0000 | [diff] [blame] | 1662 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1663 | ret = arm_smmu_install_ste_for_dev(dev->iommu_fwspec); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 1664 | if (ret < 0) |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1665 | ste->valid = false; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1666 | |
| 1667 | out_unlock: |
| 1668 | mutex_unlock(&smmu_domain->init_mutex); |
| 1669 | return ret; |
| 1670 | } |
| 1671 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1672 | static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, |
| 1673 | phys_addr_t paddr, size_t size, int prot) |
| 1674 | { |
| 1675 | int ret; |
| 1676 | unsigned long flags; |
| 1677 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1678 | struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; |
| 1679 | |
| 1680 | if (!ops) |
| 1681 | return -ENODEV; |
| 1682 | |
| 1683 | spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags); |
| 1684 | ret = ops->map(ops, iova, paddr, size, prot); |
| 1685 | spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags); |
| 1686 | return ret; |
| 1687 | } |
| 1688 | |
| 1689 | static size_t |
| 1690 | arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) |
| 1691 | { |
| 1692 | size_t ret; |
| 1693 | unsigned long flags; |
| 1694 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1695 | struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; |
| 1696 | |
| 1697 | if (!ops) |
| 1698 | return 0; |
| 1699 | |
| 1700 | spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags); |
| 1701 | ret = ops->unmap(ops, iova, size); |
| 1702 | spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags); |
| 1703 | return ret; |
| 1704 | } |
| 1705 | |
| 1706 | static phys_addr_t |
| 1707 | arm_smmu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) |
| 1708 | { |
| 1709 | phys_addr_t ret; |
| 1710 | unsigned long flags; |
| 1711 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1712 | struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; |
| 1713 | |
| 1714 | if (!ops) |
| 1715 | return 0; |
| 1716 | |
| 1717 | spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags); |
| 1718 | ret = ops->iova_to_phys(ops, iova); |
| 1719 | spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags); |
| 1720 | |
| 1721 | return ret; |
| 1722 | } |
| 1723 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1724 | static struct platform_driver arm_smmu_driver; |
| 1725 | |
| 1726 | static int arm_smmu_match_node(struct device *dev, void *data) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1727 | { |
Lorenzo Pieralisi | 778de07 | 2016-11-21 10:01:38 +0000 | [diff] [blame] | 1728 | return dev->fwnode == data; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1729 | } |
| 1730 | |
Lorenzo Pieralisi | 778de07 | 2016-11-21 10:01:38 +0000 | [diff] [blame] | 1731 | static |
| 1732 | struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1733 | { |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1734 | struct device *dev = driver_find_device(&arm_smmu_driver.driver, NULL, |
Lorenzo Pieralisi | 778de07 | 2016-11-21 10:01:38 +0000 | [diff] [blame] | 1735 | fwnode, arm_smmu_match_node); |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1736 | put_device(dev); |
| 1737 | return dev ? dev_get_drvdata(dev) : NULL; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1738 | } |
| 1739 | |
| 1740 | static bool arm_smmu_sid_in_range(struct arm_smmu_device *smmu, u32 sid) |
| 1741 | { |
| 1742 | unsigned long limit = smmu->strtab_cfg.num_l1_ents; |
| 1743 | |
| 1744 | if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) |
| 1745 | limit *= 1UL << STRTAB_SPLIT; |
| 1746 | |
| 1747 | return sid < limit; |
| 1748 | } |
| 1749 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1750 | static struct iommu_ops arm_smmu_ops; |
| 1751 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1752 | static int arm_smmu_add_device(struct device *dev) |
| 1753 | { |
| 1754 | int i, ret; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1755 | struct arm_smmu_device *smmu; |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1756 | struct arm_smmu_master_data *master; |
| 1757 | struct iommu_fwspec *fwspec = dev->iommu_fwspec; |
| 1758 | struct iommu_group *group; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1759 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1760 | if (!fwspec || fwspec->ops != &arm_smmu_ops) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1761 | return -ENODEV; |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1762 | /* |
| 1763 | * We _can_ actually withstand dodgy bus code re-calling add_device() |
| 1764 | * without an intervening remove_device()/of_xlate() sequence, but |
| 1765 | * we're not going to do so quietly... |
| 1766 | */ |
| 1767 | if (WARN_ON_ONCE(fwspec->iommu_priv)) { |
| 1768 | master = fwspec->iommu_priv; |
| 1769 | smmu = master->smmu; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1770 | } else { |
Lorenzo Pieralisi | 778de07 | 2016-11-21 10:01:38 +0000 | [diff] [blame] | 1771 | smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode); |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1772 | if (!smmu) |
| 1773 | return -ENODEV; |
| 1774 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
| 1775 | if (!master) |
| 1776 | return -ENOMEM; |
| 1777 | |
| 1778 | master->smmu = smmu; |
| 1779 | fwspec->iommu_priv = master; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1780 | } |
| 1781 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1782 | /* Check the SIDs are in range of the SMMU and our stream table */ |
| 1783 | for (i = 0; i < fwspec->num_ids; i++) { |
| 1784 | u32 sid = fwspec->ids[i]; |
| 1785 | |
| 1786 | if (!arm_smmu_sid_in_range(smmu, sid)) |
| 1787 | return -ERANGE; |
| 1788 | |
| 1789 | /* Ensure l2 strtab is initialised */ |
| 1790 | if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { |
| 1791 | ret = arm_smmu_init_l2_strtab(smmu, sid); |
| 1792 | if (ret) |
| 1793 | return ret; |
| 1794 | } |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1795 | } |
| 1796 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1797 | group = iommu_group_get_for_dev(dev); |
| 1798 | if (!IS_ERR(group)) |
| 1799 | iommu_group_put(group); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1800 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1801 | return PTR_ERR_OR_ZERO(group); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1802 | } |
| 1803 | |
| 1804 | static void arm_smmu_remove_device(struct device *dev) |
| 1805 | { |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1806 | struct iommu_fwspec *fwspec = dev->iommu_fwspec; |
| 1807 | struct arm_smmu_master_data *master; |
| 1808 | |
| 1809 | if (!fwspec || fwspec->ops != &arm_smmu_ops) |
| 1810 | return; |
| 1811 | |
| 1812 | master = fwspec->iommu_priv; |
| 1813 | if (master && master->ste.valid) |
| 1814 | arm_smmu_detach_dev(dev); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1815 | iommu_group_remove_device(dev); |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1816 | kfree(master); |
| 1817 | iommu_fwspec_free(dev); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1818 | } |
| 1819 | |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 1820 | static struct iommu_group *arm_smmu_device_group(struct device *dev) |
| 1821 | { |
| 1822 | struct iommu_group *group; |
| 1823 | |
| 1824 | /* |
| 1825 | * We don't support devices sharing stream IDs other than PCI RID |
| 1826 | * aliases, since the necessary ID-to-device lookup becomes rather |
| 1827 | * impractical given a potential sparse 32-bit stream ID space. |
| 1828 | */ |
| 1829 | if (dev_is_pci(dev)) |
| 1830 | group = pci_device_group(dev); |
| 1831 | else |
| 1832 | group = generic_device_group(dev); |
| 1833 | |
| 1834 | return group; |
| 1835 | } |
| 1836 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1837 | static int arm_smmu_domain_get_attr(struct iommu_domain *domain, |
| 1838 | enum iommu_attr attr, void *data) |
| 1839 | { |
| 1840 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1841 | |
| 1842 | switch (attr) { |
| 1843 | case DOMAIN_ATTR_NESTING: |
| 1844 | *(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED); |
| 1845 | return 0; |
| 1846 | default: |
| 1847 | return -ENODEV; |
| 1848 | } |
| 1849 | } |
| 1850 | |
| 1851 | static int arm_smmu_domain_set_attr(struct iommu_domain *domain, |
| 1852 | enum iommu_attr attr, void *data) |
| 1853 | { |
| 1854 | int ret = 0; |
| 1855 | struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); |
| 1856 | |
| 1857 | mutex_lock(&smmu_domain->init_mutex); |
| 1858 | |
| 1859 | switch (attr) { |
| 1860 | case DOMAIN_ATTR_NESTING: |
| 1861 | if (smmu_domain->smmu) { |
| 1862 | ret = -EPERM; |
| 1863 | goto out_unlock; |
| 1864 | } |
| 1865 | |
| 1866 | if (*(int *)data) |
| 1867 | smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED; |
| 1868 | else |
| 1869 | smmu_domain->stage = ARM_SMMU_DOMAIN_S1; |
| 1870 | |
| 1871 | break; |
| 1872 | default: |
| 1873 | ret = -ENODEV; |
| 1874 | } |
| 1875 | |
| 1876 | out_unlock: |
| 1877 | mutex_unlock(&smmu_domain->init_mutex); |
| 1878 | return ret; |
| 1879 | } |
| 1880 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1881 | static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) |
| 1882 | { |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1883 | return iommu_fwspec_add_ids(dev, args->args, 1); |
| 1884 | } |
| 1885 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1886 | static struct iommu_ops arm_smmu_ops = { |
| 1887 | .capable = arm_smmu_capable, |
| 1888 | .domain_alloc = arm_smmu_domain_alloc, |
| 1889 | .domain_free = arm_smmu_domain_free, |
| 1890 | .attach_dev = arm_smmu_attach_dev, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1891 | .map = arm_smmu_map, |
| 1892 | .unmap = arm_smmu_unmap, |
Jean-Philippe Brucker | 9aeb26c | 2016-06-03 11:50:30 +0100 | [diff] [blame] | 1893 | .map_sg = default_iommu_map_sg, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1894 | .iova_to_phys = arm_smmu_iova_to_phys, |
| 1895 | .add_device = arm_smmu_add_device, |
| 1896 | .remove_device = arm_smmu_remove_device, |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 1897 | .device_group = arm_smmu_device_group, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1898 | .domain_get_attr = arm_smmu_domain_get_attr, |
| 1899 | .domain_set_attr = arm_smmu_domain_set_attr, |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 1900 | .of_xlate = arm_smmu_of_xlate, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1901 | .pgsize_bitmap = -1UL, /* Restricted during device attach */ |
| 1902 | }; |
| 1903 | |
| 1904 | /* Probing and initialisation functions */ |
| 1905 | static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu, |
| 1906 | struct arm_smmu_queue *q, |
| 1907 | unsigned long prod_off, |
| 1908 | unsigned long cons_off, |
| 1909 | size_t dwords) |
| 1910 | { |
| 1911 | size_t qsz = ((1 << q->max_n_shift) * dwords) << 3; |
| 1912 | |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1913 | q->base = dmam_alloc_coherent(smmu->dev, qsz, &q->base_dma, GFP_KERNEL); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1914 | if (!q->base) { |
| 1915 | dev_err(smmu->dev, "failed to allocate queue (0x%zx bytes)\n", |
| 1916 | qsz); |
| 1917 | return -ENOMEM; |
| 1918 | } |
| 1919 | |
| 1920 | q->prod_reg = smmu->base + prod_off; |
| 1921 | q->cons_reg = smmu->base + cons_off; |
| 1922 | q->ent_dwords = dwords; |
| 1923 | |
| 1924 | q->q_base = Q_BASE_RWA; |
| 1925 | q->q_base |= q->base_dma & Q_BASE_ADDR_MASK << Q_BASE_ADDR_SHIFT; |
| 1926 | q->q_base |= (q->max_n_shift & Q_BASE_LOG2SIZE_MASK) |
| 1927 | << Q_BASE_LOG2SIZE_SHIFT; |
| 1928 | |
| 1929 | q->prod = q->cons = 0; |
| 1930 | return 0; |
| 1931 | } |
| 1932 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1933 | static int arm_smmu_init_queues(struct arm_smmu_device *smmu) |
| 1934 | { |
| 1935 | int ret; |
| 1936 | |
| 1937 | /* cmdq */ |
| 1938 | spin_lock_init(&smmu->cmdq.lock); |
| 1939 | ret = arm_smmu_init_one_queue(smmu, &smmu->cmdq.q, ARM_SMMU_CMDQ_PROD, |
| 1940 | ARM_SMMU_CMDQ_CONS, CMDQ_ENT_DWORDS); |
| 1941 | if (ret) |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1942 | return ret; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1943 | |
| 1944 | /* evtq */ |
| 1945 | ret = arm_smmu_init_one_queue(smmu, &smmu->evtq.q, ARM_SMMU_EVTQ_PROD, |
| 1946 | ARM_SMMU_EVTQ_CONS, EVTQ_ENT_DWORDS); |
| 1947 | if (ret) |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1948 | return ret; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1949 | |
| 1950 | /* priq */ |
| 1951 | if (!(smmu->features & ARM_SMMU_FEAT_PRI)) |
| 1952 | return 0; |
| 1953 | |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 1954 | return arm_smmu_init_one_queue(smmu, &smmu->priq.q, ARM_SMMU_PRIQ_PROD, |
| 1955 | ARM_SMMU_PRIQ_CONS, PRIQ_ENT_DWORDS); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1956 | } |
| 1957 | |
| 1958 | static int arm_smmu_init_l1_strtab(struct arm_smmu_device *smmu) |
| 1959 | { |
| 1960 | unsigned int i; |
| 1961 | struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; |
| 1962 | size_t size = sizeof(*cfg->l1_desc) * cfg->num_l1_ents; |
| 1963 | void *strtab = smmu->strtab_cfg.strtab; |
| 1964 | |
| 1965 | cfg->l1_desc = devm_kzalloc(smmu->dev, size, GFP_KERNEL); |
| 1966 | if (!cfg->l1_desc) { |
| 1967 | dev_err(smmu->dev, "failed to allocate l1 stream table desc\n"); |
| 1968 | return -ENOMEM; |
| 1969 | } |
| 1970 | |
| 1971 | for (i = 0; i < cfg->num_l1_ents; ++i) { |
| 1972 | arm_smmu_write_strtab_l1_desc(strtab, &cfg->l1_desc[i]); |
| 1973 | strtab += STRTAB_L1_DESC_DWORDS << 3; |
| 1974 | } |
| 1975 | |
| 1976 | return 0; |
| 1977 | } |
| 1978 | |
| 1979 | static int arm_smmu_init_strtab_2lvl(struct arm_smmu_device *smmu) |
| 1980 | { |
| 1981 | void *strtab; |
| 1982 | u64 reg; |
Will Deacon | d2e88e7 | 2015-06-30 10:02:28 +0100 | [diff] [blame] | 1983 | u32 size, l1size; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 1984 | struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; |
| 1985 | |
Will Deacon | 28c8b40 | 2015-07-16 17:50:12 +0100 | [diff] [blame] | 1986 | /* |
| 1987 | * If we can resolve everything with a single L2 table, then we |
| 1988 | * just need a single L1 descriptor. Otherwise, calculate the L1 |
| 1989 | * size, capped to the SIDSIZE. |
| 1990 | */ |
| 1991 | if (smmu->sid_bits < STRTAB_SPLIT) { |
| 1992 | size = 0; |
| 1993 | } else { |
| 1994 | size = STRTAB_L1_SZ_SHIFT - (ilog2(STRTAB_L1_DESC_DWORDS) + 3); |
| 1995 | size = min(size, smmu->sid_bits - STRTAB_SPLIT); |
| 1996 | } |
Will Deacon | d2e88e7 | 2015-06-30 10:02:28 +0100 | [diff] [blame] | 1997 | cfg->num_l1_ents = 1 << size; |
| 1998 | |
| 1999 | size += STRTAB_SPLIT; |
| 2000 | if (size < smmu->sid_bits) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2001 | dev_warn(smmu->dev, |
| 2002 | "2-level strtab only covers %u/%u bits of SID\n", |
Will Deacon | d2e88e7 | 2015-06-30 10:02:28 +0100 | [diff] [blame] | 2003 | size, smmu->sid_bits); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2004 | |
Will Deacon | d2e88e7 | 2015-06-30 10:02:28 +0100 | [diff] [blame] | 2005 | l1size = cfg->num_l1_ents * (STRTAB_L1_DESC_DWORDS << 3); |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 2006 | strtab = dmam_alloc_coherent(smmu->dev, l1size, &cfg->strtab_dma, |
| 2007 | GFP_KERNEL | __GFP_ZERO); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2008 | if (!strtab) { |
| 2009 | dev_err(smmu->dev, |
| 2010 | "failed to allocate l1 stream table (%u bytes)\n", |
| 2011 | size); |
| 2012 | return -ENOMEM; |
| 2013 | } |
| 2014 | cfg->strtab = strtab; |
| 2015 | |
| 2016 | /* Configure strtab_base_cfg for 2 levels */ |
| 2017 | reg = STRTAB_BASE_CFG_FMT_2LVL; |
| 2018 | reg |= (size & STRTAB_BASE_CFG_LOG2SIZE_MASK) |
| 2019 | << STRTAB_BASE_CFG_LOG2SIZE_SHIFT; |
| 2020 | reg |= (STRTAB_SPLIT & STRTAB_BASE_CFG_SPLIT_MASK) |
| 2021 | << STRTAB_BASE_CFG_SPLIT_SHIFT; |
| 2022 | cfg->strtab_base_cfg = reg; |
| 2023 | |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 2024 | return arm_smmu_init_l1_strtab(smmu); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2025 | } |
| 2026 | |
| 2027 | static int arm_smmu_init_strtab_linear(struct arm_smmu_device *smmu) |
| 2028 | { |
| 2029 | void *strtab; |
| 2030 | u64 reg; |
| 2031 | u32 size; |
| 2032 | struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg; |
| 2033 | |
| 2034 | size = (1 << smmu->sid_bits) * (STRTAB_STE_DWORDS << 3); |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 2035 | strtab = dmam_alloc_coherent(smmu->dev, size, &cfg->strtab_dma, |
| 2036 | GFP_KERNEL | __GFP_ZERO); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2037 | if (!strtab) { |
| 2038 | dev_err(smmu->dev, |
| 2039 | "failed to allocate linear stream table (%u bytes)\n", |
| 2040 | size); |
| 2041 | return -ENOMEM; |
| 2042 | } |
| 2043 | cfg->strtab = strtab; |
| 2044 | cfg->num_l1_ents = 1 << smmu->sid_bits; |
| 2045 | |
| 2046 | /* Configure strtab_base_cfg for a linear table covering all SIDs */ |
| 2047 | reg = STRTAB_BASE_CFG_FMT_LINEAR; |
| 2048 | reg |= (smmu->sid_bits & STRTAB_BASE_CFG_LOG2SIZE_MASK) |
| 2049 | << STRTAB_BASE_CFG_LOG2SIZE_SHIFT; |
| 2050 | cfg->strtab_base_cfg = reg; |
| 2051 | |
| 2052 | arm_smmu_init_bypass_stes(strtab, cfg->num_l1_ents); |
| 2053 | return 0; |
| 2054 | } |
| 2055 | |
| 2056 | static int arm_smmu_init_strtab(struct arm_smmu_device *smmu) |
| 2057 | { |
| 2058 | u64 reg; |
| 2059 | int ret; |
| 2060 | |
| 2061 | if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) |
| 2062 | ret = arm_smmu_init_strtab_2lvl(smmu); |
| 2063 | else |
| 2064 | ret = arm_smmu_init_strtab_linear(smmu); |
| 2065 | |
| 2066 | if (ret) |
| 2067 | return ret; |
| 2068 | |
| 2069 | /* Set the strtab base address */ |
| 2070 | reg = smmu->strtab_cfg.strtab_dma & |
| 2071 | STRTAB_BASE_ADDR_MASK << STRTAB_BASE_ADDR_SHIFT; |
| 2072 | reg |= STRTAB_BASE_RA; |
| 2073 | smmu->strtab_cfg.strtab_base = reg; |
| 2074 | |
| 2075 | /* Allocate the first VMID for stage-2 bypass STEs */ |
| 2076 | set_bit(0, smmu->vmid_map); |
| 2077 | return 0; |
| 2078 | } |
| 2079 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2080 | static int arm_smmu_init_structures(struct arm_smmu_device *smmu) |
| 2081 | { |
| 2082 | int ret; |
| 2083 | |
| 2084 | ret = arm_smmu_init_queues(smmu); |
| 2085 | if (ret) |
| 2086 | return ret; |
| 2087 | |
Will Deacon | 04fa26c | 2015-10-30 18:12:41 +0000 | [diff] [blame] | 2088 | return arm_smmu_init_strtab(smmu); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2089 | } |
| 2090 | |
| 2091 | static int arm_smmu_write_reg_sync(struct arm_smmu_device *smmu, u32 val, |
| 2092 | unsigned int reg_off, unsigned int ack_off) |
| 2093 | { |
| 2094 | u32 reg; |
| 2095 | |
| 2096 | writel_relaxed(val, smmu->base + reg_off); |
| 2097 | return readl_relaxed_poll_timeout(smmu->base + ack_off, reg, reg == val, |
| 2098 | 1, ARM_SMMU_POLL_TIMEOUT_US); |
| 2099 | } |
| 2100 | |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 2101 | /* GBPA is "special" */ |
| 2102 | static int arm_smmu_update_gbpa(struct arm_smmu_device *smmu, u32 set, u32 clr) |
| 2103 | { |
| 2104 | int ret; |
| 2105 | u32 reg, __iomem *gbpa = smmu->base + ARM_SMMU_GBPA; |
| 2106 | |
| 2107 | ret = readl_relaxed_poll_timeout(gbpa, reg, !(reg & GBPA_UPDATE), |
| 2108 | 1, ARM_SMMU_POLL_TIMEOUT_US); |
| 2109 | if (ret) |
| 2110 | return ret; |
| 2111 | |
| 2112 | reg &= ~clr; |
| 2113 | reg |= set; |
| 2114 | writel_relaxed(reg | GBPA_UPDATE, gbpa); |
| 2115 | return readl_relaxed_poll_timeout(gbpa, reg, !(reg & GBPA_UPDATE), |
| 2116 | 1, ARM_SMMU_POLL_TIMEOUT_US); |
| 2117 | } |
| 2118 | |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 2119 | static void arm_smmu_free_msis(void *data) |
| 2120 | { |
| 2121 | struct device *dev = data; |
| 2122 | platform_msi_domain_free_irqs(dev); |
| 2123 | } |
| 2124 | |
| 2125 | static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg) |
| 2126 | { |
| 2127 | phys_addr_t doorbell; |
| 2128 | struct device *dev = msi_desc_to_dev(desc); |
| 2129 | struct arm_smmu_device *smmu = dev_get_drvdata(dev); |
| 2130 | phys_addr_t *cfg = arm_smmu_msi_cfg[desc->platform.msi_index]; |
| 2131 | |
| 2132 | doorbell = (((u64)msg->address_hi) << 32) | msg->address_lo; |
| 2133 | doorbell &= MSI_CFG0_ADDR_MASK << MSI_CFG0_ADDR_SHIFT; |
| 2134 | |
| 2135 | writeq_relaxed(doorbell, smmu->base + cfg[0]); |
| 2136 | writel_relaxed(msg->data, smmu->base + cfg[1]); |
| 2137 | writel_relaxed(MSI_CFG2_MEMATTR_DEVICE_nGnRE, smmu->base + cfg[2]); |
| 2138 | } |
| 2139 | |
| 2140 | static void arm_smmu_setup_msis(struct arm_smmu_device *smmu) |
| 2141 | { |
| 2142 | struct msi_desc *desc; |
| 2143 | int ret, nvec = ARM_SMMU_MAX_MSIS; |
| 2144 | struct device *dev = smmu->dev; |
| 2145 | |
| 2146 | /* Clear the MSI address regs */ |
| 2147 | writeq_relaxed(0, smmu->base + ARM_SMMU_GERROR_IRQ_CFG0); |
| 2148 | writeq_relaxed(0, smmu->base + ARM_SMMU_EVTQ_IRQ_CFG0); |
| 2149 | |
| 2150 | if (smmu->features & ARM_SMMU_FEAT_PRI) |
| 2151 | writeq_relaxed(0, smmu->base + ARM_SMMU_PRIQ_IRQ_CFG0); |
| 2152 | else |
| 2153 | nvec--; |
| 2154 | |
| 2155 | if (!(smmu->features & ARM_SMMU_FEAT_MSI)) |
| 2156 | return; |
| 2157 | |
| 2158 | /* Allocate MSIs for evtq, gerror and priq. Ignore cmdq */ |
| 2159 | ret = platform_msi_domain_alloc_irqs(dev, nvec, arm_smmu_write_msi_msg); |
| 2160 | if (ret) { |
| 2161 | dev_warn(dev, "failed to allocate MSIs\n"); |
| 2162 | return; |
| 2163 | } |
| 2164 | |
| 2165 | for_each_msi_entry(desc, dev) { |
| 2166 | switch (desc->platform.msi_index) { |
| 2167 | case EVTQ_MSI_INDEX: |
| 2168 | smmu->evtq.q.irq = desc->irq; |
| 2169 | break; |
| 2170 | case GERROR_MSI_INDEX: |
| 2171 | smmu->gerr_irq = desc->irq; |
| 2172 | break; |
| 2173 | case PRIQ_MSI_INDEX: |
| 2174 | smmu->priq.q.irq = desc->irq; |
| 2175 | break; |
| 2176 | default: /* Unknown */ |
| 2177 | continue; |
| 2178 | } |
| 2179 | } |
| 2180 | |
| 2181 | /* Add callback to free MSIs on teardown */ |
| 2182 | devm_add_action(dev, arm_smmu_free_msis, dev); |
| 2183 | } |
| 2184 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2185 | static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu) |
| 2186 | { |
| 2187 | int ret, irq; |
Marc Zyngier | ccd6385 | 2015-07-15 11:55:18 +0100 | [diff] [blame] | 2188 | u32 irqen_flags = IRQ_CTRL_EVTQ_IRQEN | IRQ_CTRL_GERROR_IRQEN; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2189 | |
| 2190 | /* Disable IRQs first */ |
| 2191 | ret = arm_smmu_write_reg_sync(smmu, 0, ARM_SMMU_IRQ_CTRL, |
| 2192 | ARM_SMMU_IRQ_CTRLACK); |
| 2193 | if (ret) { |
| 2194 | dev_err(smmu->dev, "failed to disable irqs\n"); |
| 2195 | return ret; |
| 2196 | } |
| 2197 | |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 2198 | arm_smmu_setup_msis(smmu); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2199 | |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 2200 | /* Request interrupt lines */ |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2201 | irq = smmu->evtq.q.irq; |
| 2202 | if (irq) { |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 2203 | ret = devm_request_threaded_irq(smmu->dev, irq, NULL, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2204 | arm_smmu_evtq_thread, |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 2205 | IRQF_ONESHOT, |
| 2206 | "arm-smmu-v3-evtq", smmu); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 2207 | if (ret < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2208 | dev_warn(smmu->dev, "failed to enable evtq irq\n"); |
| 2209 | } |
| 2210 | |
| 2211 | irq = smmu->cmdq.q.irq; |
| 2212 | if (irq) { |
| 2213 | ret = devm_request_irq(smmu->dev, irq, |
| 2214 | arm_smmu_cmdq_sync_handler, 0, |
| 2215 | "arm-smmu-v3-cmdq-sync", smmu); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 2216 | if (ret < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2217 | dev_warn(smmu->dev, "failed to enable cmdq-sync irq\n"); |
| 2218 | } |
| 2219 | |
| 2220 | irq = smmu->gerr_irq; |
| 2221 | if (irq) { |
| 2222 | ret = devm_request_irq(smmu->dev, irq, arm_smmu_gerror_handler, |
| 2223 | 0, "arm-smmu-v3-gerror", smmu); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 2224 | if (ret < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2225 | dev_warn(smmu->dev, "failed to enable gerror irq\n"); |
| 2226 | } |
| 2227 | |
| 2228 | if (smmu->features & ARM_SMMU_FEAT_PRI) { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2229 | irq = smmu->priq.q.irq; |
| 2230 | if (irq) { |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 2231 | ret = devm_request_threaded_irq(smmu->dev, irq, NULL, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2232 | arm_smmu_priq_thread, |
Jean-Philippe Brucker | b4163fb | 2016-08-22 14:42:24 +0100 | [diff] [blame] | 2233 | IRQF_ONESHOT, |
| 2234 | "arm-smmu-v3-priq", |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2235 | smmu); |
Arnd Bergmann | 287980e | 2016-05-27 23:23:25 +0200 | [diff] [blame] | 2236 | if (ret < 0) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2237 | dev_warn(smmu->dev, |
| 2238 | "failed to enable priq irq\n"); |
Marc Zyngier | ccd6385 | 2015-07-15 11:55:18 +0100 | [diff] [blame] | 2239 | else |
| 2240 | irqen_flags |= IRQ_CTRL_PRIQ_IRQEN; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2241 | } |
| 2242 | } |
| 2243 | |
| 2244 | /* Enable interrupt generation on the SMMU */ |
Marc Zyngier | ccd6385 | 2015-07-15 11:55:18 +0100 | [diff] [blame] | 2245 | ret = arm_smmu_write_reg_sync(smmu, irqen_flags, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2246 | ARM_SMMU_IRQ_CTRL, ARM_SMMU_IRQ_CTRLACK); |
| 2247 | if (ret) |
| 2248 | dev_warn(smmu->dev, "failed to enable irqs\n"); |
| 2249 | |
| 2250 | return 0; |
| 2251 | } |
| 2252 | |
| 2253 | static int arm_smmu_device_disable(struct arm_smmu_device *smmu) |
| 2254 | { |
| 2255 | int ret; |
| 2256 | |
| 2257 | ret = arm_smmu_write_reg_sync(smmu, 0, ARM_SMMU_CR0, ARM_SMMU_CR0ACK); |
| 2258 | if (ret) |
| 2259 | dev_err(smmu->dev, "failed to clear cr0\n"); |
| 2260 | |
| 2261 | return ret; |
| 2262 | } |
| 2263 | |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 2264 | static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2265 | { |
| 2266 | int ret; |
| 2267 | u32 reg, enables; |
| 2268 | struct arm_smmu_cmdq_ent cmd; |
| 2269 | |
| 2270 | /* Clear CR0 and sync (disables SMMU and queue processing) */ |
| 2271 | reg = readl_relaxed(smmu->base + ARM_SMMU_CR0); |
| 2272 | if (reg & CR0_SMMUEN) |
| 2273 | dev_warn(smmu->dev, "SMMU currently enabled! Resetting...\n"); |
| 2274 | |
| 2275 | ret = arm_smmu_device_disable(smmu); |
| 2276 | if (ret) |
| 2277 | return ret; |
| 2278 | |
| 2279 | /* CR1 (table and queue memory attributes) */ |
| 2280 | reg = (CR1_SH_ISH << CR1_TABLE_SH_SHIFT) | |
| 2281 | (CR1_CACHE_WB << CR1_TABLE_OC_SHIFT) | |
| 2282 | (CR1_CACHE_WB << CR1_TABLE_IC_SHIFT) | |
| 2283 | (CR1_SH_ISH << CR1_QUEUE_SH_SHIFT) | |
| 2284 | (CR1_CACHE_WB << CR1_QUEUE_OC_SHIFT) | |
| 2285 | (CR1_CACHE_WB << CR1_QUEUE_IC_SHIFT); |
| 2286 | writel_relaxed(reg, smmu->base + ARM_SMMU_CR1); |
| 2287 | |
| 2288 | /* CR2 (random crap) */ |
| 2289 | reg = CR2_PTM | CR2_RECINVSID | CR2_E2H; |
| 2290 | writel_relaxed(reg, smmu->base + ARM_SMMU_CR2); |
| 2291 | |
| 2292 | /* Stream table */ |
| 2293 | writeq_relaxed(smmu->strtab_cfg.strtab_base, |
| 2294 | smmu->base + ARM_SMMU_STRTAB_BASE); |
| 2295 | writel_relaxed(smmu->strtab_cfg.strtab_base_cfg, |
| 2296 | smmu->base + ARM_SMMU_STRTAB_BASE_CFG); |
| 2297 | |
| 2298 | /* Command queue */ |
| 2299 | writeq_relaxed(smmu->cmdq.q.q_base, smmu->base + ARM_SMMU_CMDQ_BASE); |
| 2300 | writel_relaxed(smmu->cmdq.q.prod, smmu->base + ARM_SMMU_CMDQ_PROD); |
| 2301 | writel_relaxed(smmu->cmdq.q.cons, smmu->base + ARM_SMMU_CMDQ_CONS); |
| 2302 | |
| 2303 | enables = CR0_CMDQEN; |
| 2304 | ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, |
| 2305 | ARM_SMMU_CR0ACK); |
| 2306 | if (ret) { |
| 2307 | dev_err(smmu->dev, "failed to enable command queue\n"); |
| 2308 | return ret; |
| 2309 | } |
| 2310 | |
| 2311 | /* Invalidate any cached configuration */ |
| 2312 | cmd.opcode = CMDQ_OP_CFGI_ALL; |
| 2313 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 2314 | cmd.opcode = CMDQ_OP_CMD_SYNC; |
| 2315 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 2316 | |
| 2317 | /* Invalidate any stale TLB entries */ |
| 2318 | if (smmu->features & ARM_SMMU_FEAT_HYP) { |
| 2319 | cmd.opcode = CMDQ_OP_TLBI_EL2_ALL; |
| 2320 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 2321 | } |
| 2322 | |
| 2323 | cmd.opcode = CMDQ_OP_TLBI_NSNH_ALL; |
| 2324 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 2325 | cmd.opcode = CMDQ_OP_CMD_SYNC; |
| 2326 | arm_smmu_cmdq_issue_cmd(smmu, &cmd); |
| 2327 | |
| 2328 | /* Event queue */ |
| 2329 | writeq_relaxed(smmu->evtq.q.q_base, smmu->base + ARM_SMMU_EVTQ_BASE); |
| 2330 | writel_relaxed(smmu->evtq.q.prod, smmu->base + ARM_SMMU_EVTQ_PROD); |
| 2331 | writel_relaxed(smmu->evtq.q.cons, smmu->base + ARM_SMMU_EVTQ_CONS); |
| 2332 | |
| 2333 | enables |= CR0_EVTQEN; |
| 2334 | ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, |
| 2335 | ARM_SMMU_CR0ACK); |
| 2336 | if (ret) { |
| 2337 | dev_err(smmu->dev, "failed to enable event queue\n"); |
| 2338 | return ret; |
| 2339 | } |
| 2340 | |
| 2341 | /* PRI queue */ |
| 2342 | if (smmu->features & ARM_SMMU_FEAT_PRI) { |
| 2343 | writeq_relaxed(smmu->priq.q.q_base, |
| 2344 | smmu->base + ARM_SMMU_PRIQ_BASE); |
| 2345 | writel_relaxed(smmu->priq.q.prod, |
| 2346 | smmu->base + ARM_SMMU_PRIQ_PROD); |
| 2347 | writel_relaxed(smmu->priq.q.cons, |
| 2348 | smmu->base + ARM_SMMU_PRIQ_CONS); |
| 2349 | |
| 2350 | enables |= CR0_PRIQEN; |
| 2351 | ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, |
| 2352 | ARM_SMMU_CR0ACK); |
| 2353 | if (ret) { |
| 2354 | dev_err(smmu->dev, "failed to enable PRI queue\n"); |
| 2355 | return ret; |
| 2356 | } |
| 2357 | } |
| 2358 | |
| 2359 | ret = arm_smmu_setup_irqs(smmu); |
| 2360 | if (ret) { |
| 2361 | dev_err(smmu->dev, "failed to setup irqs\n"); |
| 2362 | return ret; |
| 2363 | } |
| 2364 | |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 2365 | |
| 2366 | /* Enable the SMMU interface, or ensure bypass */ |
| 2367 | if (!bypass || disable_bypass) { |
| 2368 | enables |= CR0_SMMUEN; |
| 2369 | } else { |
| 2370 | ret = arm_smmu_update_gbpa(smmu, 0, GBPA_ABORT); |
| 2371 | if (ret) { |
| 2372 | dev_err(smmu->dev, "GBPA not responding to update\n"); |
| 2373 | return ret; |
| 2374 | } |
| 2375 | } |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2376 | ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, |
| 2377 | ARM_SMMU_CR0ACK); |
| 2378 | if (ret) { |
| 2379 | dev_err(smmu->dev, "failed to enable SMMU interface\n"); |
| 2380 | return ret; |
| 2381 | } |
| 2382 | |
| 2383 | return 0; |
| 2384 | } |
| 2385 | |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2386 | static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2387 | { |
| 2388 | u32 reg; |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2389 | bool coherent = smmu->features & ARM_SMMU_FEAT_COHERENCY; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2390 | |
| 2391 | /* IDR0 */ |
| 2392 | reg = readl_relaxed(smmu->base + ARM_SMMU_IDR0); |
| 2393 | |
| 2394 | /* 2-level structures */ |
| 2395 | if ((reg & IDR0_ST_LVL_MASK << IDR0_ST_LVL_SHIFT) == IDR0_ST_LVL_2LVL) |
| 2396 | smmu->features |= ARM_SMMU_FEAT_2_LVL_STRTAB; |
| 2397 | |
| 2398 | if (reg & IDR0_CD2L) |
| 2399 | smmu->features |= ARM_SMMU_FEAT_2_LVL_CDTAB; |
| 2400 | |
| 2401 | /* |
| 2402 | * Translation table endianness. |
| 2403 | * We currently require the same endianness as the CPU, but this |
| 2404 | * could be changed later by adding a new IO_PGTABLE_QUIRK. |
| 2405 | */ |
| 2406 | switch (reg & IDR0_TTENDIAN_MASK << IDR0_TTENDIAN_SHIFT) { |
| 2407 | case IDR0_TTENDIAN_MIXED: |
| 2408 | smmu->features |= ARM_SMMU_FEAT_TT_LE | ARM_SMMU_FEAT_TT_BE; |
| 2409 | break; |
| 2410 | #ifdef __BIG_ENDIAN |
| 2411 | case IDR0_TTENDIAN_BE: |
| 2412 | smmu->features |= ARM_SMMU_FEAT_TT_BE; |
| 2413 | break; |
| 2414 | #else |
| 2415 | case IDR0_TTENDIAN_LE: |
| 2416 | smmu->features |= ARM_SMMU_FEAT_TT_LE; |
| 2417 | break; |
| 2418 | #endif |
| 2419 | default: |
| 2420 | dev_err(smmu->dev, "unknown/unsupported TT endianness!\n"); |
| 2421 | return -ENXIO; |
| 2422 | } |
| 2423 | |
| 2424 | /* Boolean feature flags */ |
| 2425 | if (IS_ENABLED(CONFIG_PCI_PRI) && reg & IDR0_PRI) |
| 2426 | smmu->features |= ARM_SMMU_FEAT_PRI; |
| 2427 | |
| 2428 | if (IS_ENABLED(CONFIG_PCI_ATS) && reg & IDR0_ATS) |
| 2429 | smmu->features |= ARM_SMMU_FEAT_ATS; |
| 2430 | |
| 2431 | if (reg & IDR0_SEV) |
| 2432 | smmu->features |= ARM_SMMU_FEAT_SEV; |
| 2433 | |
| 2434 | if (reg & IDR0_MSI) |
| 2435 | smmu->features |= ARM_SMMU_FEAT_MSI; |
| 2436 | |
| 2437 | if (reg & IDR0_HYP) |
| 2438 | smmu->features |= ARM_SMMU_FEAT_HYP; |
| 2439 | |
| 2440 | /* |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2441 | * The coherency feature as set by FW is used in preference to the ID |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2442 | * register, but warn on mismatch. |
| 2443 | */ |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2444 | if (!!(reg & IDR0_COHACC) != coherent) |
| 2445 | dev_warn(smmu->dev, "IDR0.COHACC overridden by dma-coherent property (%s)\n", |
| 2446 | coherent ? "true" : "false"); |
| 2447 | |
Prem Mallappa | 6380be0 | 2015-12-14 22:01:23 +0530 | [diff] [blame] | 2448 | switch (reg & IDR0_STALL_MODEL_MASK << IDR0_STALL_MODEL_SHIFT) { |
| 2449 | case IDR0_STALL_MODEL_STALL: |
| 2450 | /* Fallthrough */ |
| 2451 | case IDR0_STALL_MODEL_FORCE: |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2452 | smmu->features |= ARM_SMMU_FEAT_STALLS; |
Prem Mallappa | 6380be0 | 2015-12-14 22:01:23 +0530 | [diff] [blame] | 2453 | } |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2454 | |
| 2455 | if (reg & IDR0_S1P) |
| 2456 | smmu->features |= ARM_SMMU_FEAT_TRANS_S1; |
| 2457 | |
| 2458 | if (reg & IDR0_S2P) |
| 2459 | smmu->features |= ARM_SMMU_FEAT_TRANS_S2; |
| 2460 | |
| 2461 | if (!(reg & (IDR0_S1P | IDR0_S2P))) { |
| 2462 | dev_err(smmu->dev, "no translation support!\n"); |
| 2463 | return -ENXIO; |
| 2464 | } |
| 2465 | |
| 2466 | /* We only support the AArch64 table format at present */ |
Will Deacon | f0c453d | 2015-08-20 12:12:32 +0100 | [diff] [blame] | 2467 | switch (reg & IDR0_TTF_MASK << IDR0_TTF_SHIFT) { |
| 2468 | case IDR0_TTF_AARCH32_64: |
| 2469 | smmu->ias = 40; |
| 2470 | /* Fallthrough */ |
| 2471 | case IDR0_TTF_AARCH64: |
| 2472 | break; |
| 2473 | default: |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2474 | dev_err(smmu->dev, "AArch64 table format not supported!\n"); |
| 2475 | return -ENXIO; |
| 2476 | } |
| 2477 | |
| 2478 | /* ASID/VMID sizes */ |
| 2479 | smmu->asid_bits = reg & IDR0_ASID16 ? 16 : 8; |
| 2480 | smmu->vmid_bits = reg & IDR0_VMID16 ? 16 : 8; |
| 2481 | |
| 2482 | /* IDR1 */ |
| 2483 | reg = readl_relaxed(smmu->base + ARM_SMMU_IDR1); |
| 2484 | if (reg & (IDR1_TABLES_PRESET | IDR1_QUEUES_PRESET | IDR1_REL)) { |
| 2485 | dev_err(smmu->dev, "embedded implementation not supported\n"); |
| 2486 | return -ENXIO; |
| 2487 | } |
| 2488 | |
| 2489 | /* Queue sizes, capped at 4k */ |
| 2490 | smmu->cmdq.q.max_n_shift = min((u32)CMDQ_MAX_SZ_SHIFT, |
| 2491 | reg >> IDR1_CMDQ_SHIFT & IDR1_CMDQ_MASK); |
| 2492 | if (!smmu->cmdq.q.max_n_shift) { |
| 2493 | /* Odd alignment restrictions on the base, so ignore for now */ |
| 2494 | dev_err(smmu->dev, "unit-length command queue not supported\n"); |
| 2495 | return -ENXIO; |
| 2496 | } |
| 2497 | |
| 2498 | smmu->evtq.q.max_n_shift = min((u32)EVTQ_MAX_SZ_SHIFT, |
| 2499 | reg >> IDR1_EVTQ_SHIFT & IDR1_EVTQ_MASK); |
| 2500 | smmu->priq.q.max_n_shift = min((u32)PRIQ_MAX_SZ_SHIFT, |
| 2501 | reg >> IDR1_PRIQ_SHIFT & IDR1_PRIQ_MASK); |
| 2502 | |
| 2503 | /* SID/SSID sizes */ |
| 2504 | smmu->ssid_bits = reg >> IDR1_SSID_SHIFT & IDR1_SSID_MASK; |
| 2505 | smmu->sid_bits = reg >> IDR1_SID_SHIFT & IDR1_SID_MASK; |
| 2506 | |
| 2507 | /* IDR5 */ |
| 2508 | reg = readl_relaxed(smmu->base + ARM_SMMU_IDR5); |
| 2509 | |
| 2510 | /* Maximum number of outstanding stalls */ |
| 2511 | smmu->evtq.max_stalls = reg >> IDR5_STALL_MAX_SHIFT |
| 2512 | & IDR5_STALL_MAX_MASK; |
| 2513 | |
| 2514 | /* Page sizes */ |
| 2515 | if (reg & IDR5_GRAN64K) |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 2516 | smmu->pgsize_bitmap |= SZ_64K | SZ_512M; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2517 | if (reg & IDR5_GRAN16K) |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 2518 | smmu->pgsize_bitmap |= SZ_16K | SZ_32M; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2519 | if (reg & IDR5_GRAN4K) |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 2520 | smmu->pgsize_bitmap |= SZ_4K | SZ_2M | SZ_1G; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2521 | |
Robin Murphy | d546635 | 2016-05-09 17:20:09 +0100 | [diff] [blame] | 2522 | if (arm_smmu_ops.pgsize_bitmap == -1UL) |
| 2523 | arm_smmu_ops.pgsize_bitmap = smmu->pgsize_bitmap; |
| 2524 | else |
| 2525 | arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2526 | |
| 2527 | /* Output address size */ |
| 2528 | switch (reg & IDR5_OAS_MASK << IDR5_OAS_SHIFT) { |
| 2529 | case IDR5_OAS_32_BIT: |
| 2530 | smmu->oas = 32; |
| 2531 | break; |
| 2532 | case IDR5_OAS_36_BIT: |
| 2533 | smmu->oas = 36; |
| 2534 | break; |
| 2535 | case IDR5_OAS_40_BIT: |
| 2536 | smmu->oas = 40; |
| 2537 | break; |
| 2538 | case IDR5_OAS_42_BIT: |
| 2539 | smmu->oas = 42; |
| 2540 | break; |
| 2541 | case IDR5_OAS_44_BIT: |
| 2542 | smmu->oas = 44; |
| 2543 | break; |
Will Deacon | 8543096 | 2015-08-03 10:35:40 +0100 | [diff] [blame] | 2544 | default: |
| 2545 | dev_info(smmu->dev, |
| 2546 | "unknown output address size. Truncating to 48-bit\n"); |
| 2547 | /* Fallthrough */ |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2548 | case IDR5_OAS_48_BIT: |
| 2549 | smmu->oas = 48; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2550 | } |
| 2551 | |
| 2552 | /* Set the DMA mask for our table walker */ |
| 2553 | if (dma_set_mask_and_coherent(smmu->dev, DMA_BIT_MASK(smmu->oas))) |
| 2554 | dev_warn(smmu->dev, |
| 2555 | "failed to set DMA mask for table walker\n"); |
| 2556 | |
Will Deacon | f0c453d | 2015-08-20 12:12:32 +0100 | [diff] [blame] | 2557 | smmu->ias = max(smmu->ias, smmu->oas); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2558 | |
| 2559 | dev_info(smmu->dev, "ias %lu-bit, oas %lu-bit (features 0x%08x)\n", |
| 2560 | smmu->ias, smmu->oas, smmu->features); |
| 2561 | return 0; |
| 2562 | } |
| 2563 | |
Lorenzo Pieralisi | e4dadfa | 2016-11-21 10:01:43 +0000 | [diff] [blame] | 2564 | #ifdef CONFIG_ACPI |
| 2565 | static int arm_smmu_device_acpi_probe(struct platform_device *pdev, |
| 2566 | struct arm_smmu_device *smmu) |
| 2567 | { |
| 2568 | struct acpi_iort_smmu_v3 *iort_smmu; |
| 2569 | struct device *dev = smmu->dev; |
| 2570 | struct acpi_iort_node *node; |
| 2571 | |
| 2572 | node = *(struct acpi_iort_node **)dev_get_platdata(dev); |
| 2573 | |
| 2574 | /* Retrieve SMMUv3 specific data */ |
| 2575 | iort_smmu = (struct acpi_iort_smmu_v3 *)node->node_data; |
| 2576 | |
| 2577 | if (iort_smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE) |
| 2578 | smmu->features |= ARM_SMMU_FEAT_COHERENCY; |
| 2579 | |
| 2580 | return 0; |
| 2581 | } |
| 2582 | #else |
| 2583 | static inline int arm_smmu_device_acpi_probe(struct platform_device *pdev, |
| 2584 | struct arm_smmu_device *smmu) |
| 2585 | { |
| 2586 | return -ENODEV; |
| 2587 | } |
| 2588 | #endif |
| 2589 | |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2590 | static int arm_smmu_device_dt_probe(struct platform_device *pdev, |
| 2591 | struct arm_smmu_device *smmu) |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2592 | { |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2593 | struct device *dev = &pdev->dev; |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 2594 | u32 cells; |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2595 | int ret = -EINVAL; |
Robin Murphy | dc87a98 | 2016-09-12 17:13:44 +0100 | [diff] [blame] | 2596 | |
| 2597 | if (of_property_read_u32(dev->of_node, "#iommu-cells", &cells)) |
| 2598 | dev_err(dev, "missing #iommu-cells property\n"); |
| 2599 | else if (cells != 1) |
| 2600 | dev_err(dev, "invalid #iommu-cells value (%d)\n", cells); |
| 2601 | else |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2602 | ret = 0; |
| 2603 | |
| 2604 | parse_driver_options(smmu); |
| 2605 | |
| 2606 | if (of_dma_is_coherent(dev->of_node)) |
| 2607 | smmu->features |= ARM_SMMU_FEAT_COHERENCY; |
| 2608 | |
| 2609 | return ret; |
| 2610 | } |
| 2611 | |
| 2612 | static int arm_smmu_device_probe(struct platform_device *pdev) |
| 2613 | { |
| 2614 | int irq, ret; |
| 2615 | struct resource *res; |
| 2616 | struct arm_smmu_device *smmu; |
| 2617 | struct device *dev = &pdev->dev; |
| 2618 | bool bypass; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2619 | |
| 2620 | smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL); |
| 2621 | if (!smmu) { |
| 2622 | dev_err(dev, "failed to allocate arm_smmu_device\n"); |
| 2623 | return -ENOMEM; |
| 2624 | } |
| 2625 | smmu->dev = dev; |
| 2626 | |
| 2627 | /* Base address */ |
| 2628 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 2629 | if (resource_size(res) + 1 < SZ_128K) { |
| 2630 | dev_err(dev, "MMIO region too small (%pr)\n", res); |
| 2631 | return -EINVAL; |
| 2632 | } |
| 2633 | |
| 2634 | smmu->base = devm_ioremap_resource(dev, res); |
| 2635 | if (IS_ERR(smmu->base)) |
| 2636 | return PTR_ERR(smmu->base); |
| 2637 | |
| 2638 | /* Interrupt lines */ |
| 2639 | irq = platform_get_irq_byname(pdev, "eventq"); |
| 2640 | if (irq > 0) |
| 2641 | smmu->evtq.q.irq = irq; |
| 2642 | |
| 2643 | irq = platform_get_irq_byname(pdev, "priq"); |
| 2644 | if (irq > 0) |
| 2645 | smmu->priq.q.irq = irq; |
| 2646 | |
| 2647 | irq = platform_get_irq_byname(pdev, "cmdq-sync"); |
| 2648 | if (irq > 0) |
| 2649 | smmu->cmdq.q.irq = irq; |
| 2650 | |
| 2651 | irq = platform_get_irq_byname(pdev, "gerror"); |
| 2652 | if (irq > 0) |
| 2653 | smmu->gerr_irq = irq; |
| 2654 | |
Lorenzo Pieralisi | e4dadfa | 2016-11-21 10:01:43 +0000 | [diff] [blame] | 2655 | if (dev->of_node) { |
| 2656 | ret = arm_smmu_device_dt_probe(pdev, smmu); |
| 2657 | } else { |
| 2658 | ret = arm_smmu_device_acpi_probe(pdev, smmu); |
| 2659 | if (ret == -ENODEV) |
| 2660 | return ret; |
| 2661 | } |
| 2662 | |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2663 | /* Set bypass mode according to firmware probing result */ |
Lorenzo Pieralisi | e4dadfa | 2016-11-21 10:01:43 +0000 | [diff] [blame] | 2664 | bypass = !!ret; |
Zhen Lei | 5e92946 | 2015-07-07 04:30:18 +0100 | [diff] [blame] | 2665 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2666 | /* Probe the h/w */ |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2667 | ret = arm_smmu_device_hw_probe(smmu); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2668 | if (ret) |
| 2669 | return ret; |
| 2670 | |
| 2671 | /* Initialise in-memory data structures */ |
| 2672 | ret = arm_smmu_init_structures(smmu); |
| 2673 | if (ret) |
| 2674 | return ret; |
| 2675 | |
Marc Zyngier | 166bdbd | 2015-10-13 18:32:30 +0100 | [diff] [blame] | 2676 | /* Record our private device structure */ |
| 2677 | platform_set_drvdata(pdev, smmu); |
| 2678 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2679 | /* Reset the device */ |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 2680 | ret = arm_smmu_device_reset(smmu, bypass); |
| 2681 | if (ret) |
| 2682 | return ret; |
| 2683 | |
| 2684 | /* And we're up. Go go go! */ |
Lorenzo Pieralisi | 778de07 | 2016-11-21 10:01:38 +0000 | [diff] [blame] | 2685 | iommu_register_instance(dev->fwnode, &arm_smmu_ops); |
| 2686 | |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 2687 | #ifdef CONFIG_PCI |
Robin Murphy | ec615f4 | 2016-11-03 17:39:07 +0000 | [diff] [blame] | 2688 | if (pci_bus_type.iommu_ops != &arm_smmu_ops) { |
| 2689 | pci_request_acs(); |
| 2690 | ret = bus_set_iommu(&pci_bus_type, &arm_smmu_ops); |
| 2691 | if (ret) |
| 2692 | return ret; |
| 2693 | } |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 2694 | #endif |
| 2695 | #ifdef CONFIG_ARM_AMBA |
Robin Murphy | ec615f4 | 2016-11-03 17:39:07 +0000 | [diff] [blame] | 2696 | if (amba_bustype.iommu_ops != &arm_smmu_ops) { |
| 2697 | ret = bus_set_iommu(&amba_bustype, &arm_smmu_ops); |
| 2698 | if (ret) |
| 2699 | return ret; |
| 2700 | } |
Robin Murphy | 08d4ca2 | 2016-09-12 17:13:46 +0100 | [diff] [blame] | 2701 | #endif |
Robin Murphy | ec615f4 | 2016-11-03 17:39:07 +0000 | [diff] [blame] | 2702 | if (platform_bus_type.iommu_ops != &arm_smmu_ops) { |
| 2703 | ret = bus_set_iommu(&platform_bus_type, &arm_smmu_ops); |
| 2704 | if (ret) |
| 2705 | return ret; |
| 2706 | } |
| 2707 | return 0; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2708 | } |
| 2709 | |
| 2710 | static int arm_smmu_device_remove(struct platform_device *pdev) |
| 2711 | { |
Will Deacon | 941a802 | 2015-08-11 16:25:10 +0100 | [diff] [blame] | 2712 | struct arm_smmu_device *smmu = platform_get_drvdata(pdev); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2713 | |
| 2714 | arm_smmu_device_disable(smmu); |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2715 | return 0; |
| 2716 | } |
| 2717 | |
| 2718 | static struct of_device_id arm_smmu_of_match[] = { |
| 2719 | { .compatible = "arm,smmu-v3", }, |
| 2720 | { }, |
| 2721 | }; |
| 2722 | MODULE_DEVICE_TABLE(of, arm_smmu_of_match); |
| 2723 | |
| 2724 | static struct platform_driver arm_smmu_driver = { |
| 2725 | .driver = { |
| 2726 | .name = "arm-smmu-v3", |
| 2727 | .of_match_table = of_match_ptr(arm_smmu_of_match), |
| 2728 | }, |
Lorenzo Pieralisi | 2985b52 | 2016-11-21 10:01:42 +0000 | [diff] [blame] | 2729 | .probe = arm_smmu_device_probe, |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2730 | .remove = arm_smmu_device_remove, |
| 2731 | }; |
| 2732 | |
| 2733 | static int __init arm_smmu_init(void) |
| 2734 | { |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 2735 | static bool registered; |
| 2736 | int ret = 0; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2737 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 2738 | if (!registered) { |
| 2739 | ret = platform_driver_register(&arm_smmu_driver); |
| 2740 | registered = !ret; |
| 2741 | } |
| 2742 | return ret; |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2743 | } |
| 2744 | |
| 2745 | static void __exit arm_smmu_exit(void) |
| 2746 | { |
| 2747 | return platform_driver_unregister(&arm_smmu_driver); |
| 2748 | } |
| 2749 | |
| 2750 | subsys_initcall(arm_smmu_init); |
| 2751 | module_exit(arm_smmu_exit); |
| 2752 | |
Robin Murphy | 8f78515 | 2016-09-12 17:13:45 +0100 | [diff] [blame] | 2753 | static int __init arm_smmu_of_init(struct device_node *np) |
| 2754 | { |
| 2755 | int ret = arm_smmu_init(); |
| 2756 | |
| 2757 | if (ret) |
| 2758 | return ret; |
| 2759 | |
| 2760 | if (!of_platform_device_create(np, NULL, platform_bus_type.dev_root)) |
| 2761 | return -ENODEV; |
| 2762 | |
| 2763 | return 0; |
| 2764 | } |
| 2765 | IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3", arm_smmu_of_init); |
| 2766 | |
Lorenzo Pieralisi | e4dadfa | 2016-11-21 10:01:43 +0000 | [diff] [blame] | 2767 | #ifdef CONFIG_ACPI |
| 2768 | static int __init acpi_smmu_v3_init(struct acpi_table_header *table) |
| 2769 | { |
| 2770 | if (iort_node_match(ACPI_IORT_NODE_SMMU_V3)) |
| 2771 | return arm_smmu_init(); |
| 2772 | |
| 2773 | return 0; |
| 2774 | } |
| 2775 | IORT_ACPI_DECLARE(arm_smmu_v3, ACPI_SIG_IORT, acpi_smmu_v3_init); |
| 2776 | #endif |
| 2777 | |
Will Deacon | 48ec83b | 2015-05-27 17:25:59 +0100 | [diff] [blame] | 2778 | MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations"); |
| 2779 | MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>"); |
| 2780 | MODULE_LICENSE("GPL v2"); |