John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * GXP debug dump handler |
| 4 | * |
| 5 | * Copyright (C) 2020 Google LLC |
| 6 | */ |
| 7 | |
| 8 | #include <linux/bitops.h> |
| 9 | #include <linux/delay.h> |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/dma-mapping.h> |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 12 | #include <linux/moduleparam.h> |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 13 | #include <linux/slab.h> |
| 14 | #include <linux/string.h> |
| 15 | #include <linux/workqueue.h> |
| 16 | |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 17 | #if IS_ENABLED(CONFIG_SUBSYSTEM_COREDUMP) |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 18 | #include <linux/platform_data/sscoredump.h> |
| 19 | #endif |
| 20 | |
| 21 | #include "gxp-debug-dump.h" |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 22 | #include "gxp-dma.h" |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 23 | #include "gxp-doorbell.h" |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 24 | #include "gxp-firmware.h" |
| 25 | #include "gxp-host-device-structs.h" |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 26 | #include "gxp-internal.h" |
| 27 | #include "gxp-lpm.h" |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 28 | #include "gxp-mapping.h" |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 29 | #include "gxp-pm.h" |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 30 | #include "gxp-vd.h" |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 31 | #include "gxp-wakelock.h" |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 32 | |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 33 | #define SSCD_MSG_LENGTH 64 |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 34 | |
Aurora pro automerger | 27bed78 | 2022-04-28 17:59:17 +0800 | [diff] [blame] | 35 | #define SYNC_BARRIER_BLOCK 0x00100000 |
| 36 | #define SYNC_BARRIER_BASE(_x_) ((_x_) << 12) |
| 37 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 38 | #define DEBUG_DUMP_MEMORY_SIZE 0x400000 /* size in bytes */ |
| 39 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 40 | /* Enum indicating the debug dump request reason. */ |
| 41 | enum gxp_debug_dump_init_type { |
| 42 | DEBUG_DUMP_FW_INIT, |
| 43 | DEBUG_DUMP_KERNEL_INIT |
| 44 | }; |
| 45 | |
| 46 | enum gxp_common_segments_idx { |
| 47 | GXP_COMMON_REGISTERS_IDX, |
| 48 | GXP_LPM_REGISTERS_IDX |
| 49 | }; |
| 50 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 51 | /* Whether or not the debug dump subsystem should be enabled. */ |
| 52 | static int gxp_debug_dump_enable; |
| 53 | module_param_named(debug_dump_enable, gxp_debug_dump_enable, int, 0660); |
| 54 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 55 | static void gxp_debug_dump_cache_invalidate(struct gxp_dev *gxp) |
| 56 | { |
| 57 | /* Debug dump carveout is currently coherent. NO-OP. */ |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | static void gxp_debug_dump_cache_flush(struct gxp_dev *gxp) |
| 62 | { |
| 63 | /* Debug dump carveout is currently coherent. NO-OP. */ |
| 64 | return; |
| 65 | } |
| 66 | |
Aurora pro automerger | 27bed78 | 2022-04-28 17:59:17 +0800 | [diff] [blame] | 67 | static u32 gxp_read_sync_barrier_shadow(struct gxp_dev *gxp, uint index) |
| 68 | { |
| 69 | uint barrier_reg_offset; |
| 70 | |
| 71 | if (index >= SYNC_BARRIER_COUNT) { |
| 72 | dev_err(gxp->dev, |
| 73 | "Attempt to read non-existent sync barrier: %0u\n", |
| 74 | index); |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | barrier_reg_offset = SYNC_BARRIER_BLOCK + SYNC_BARRIER_BASE(index) + |
| 79 | SYNC_BARRIER_SHADOW_OFFSET; |
| 80 | |
| 81 | return gxp_read_32(gxp, barrier_reg_offset); |
| 82 | } |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 83 | |
| 84 | static void |
| 85 | gxp_get_common_registers(struct gxp_dev *gxp, struct gxp_seg_header *seg_header, |
| 86 | struct gxp_common_registers *common_regs) |
| 87 | { |
| 88 | int i; |
| 89 | u32 addr; |
| 90 | |
| 91 | dev_dbg(gxp->dev, "Getting common registers\n"); |
| 92 | |
| 93 | strscpy(seg_header->name, "Common Registers", sizeof(seg_header->name)); |
| 94 | seg_header->valid = 1; |
| 95 | seg_header->size = sizeof(*common_regs); |
| 96 | |
| 97 | /* Get Aurora Top registers */ |
| 98 | common_regs->aurora_revision = |
| 99 | gxp_read_32(gxp, GXP_REG_AURORA_REVISION); |
| 100 | common_regs->common_int_pol_0 = |
| 101 | gxp_read_32(gxp, GXP_REG_COMMON_INT_POL_0); |
| 102 | common_regs->common_int_pol_1 = |
| 103 | gxp_read_32(gxp, GXP_REG_COMMON_INT_POL_1); |
| 104 | common_regs->dedicated_int_pol = |
| 105 | gxp_read_32(gxp, GXP_REG_DEDICATED_INT_POL); |
| 106 | common_regs->raw_ext_int = gxp_read_32(gxp, GXP_REG_RAW_EXT_INT); |
| 107 | |
| 108 | for (i = 0; i < CORE_PD_COUNT; i++) { |
| 109 | common_regs->core_pd[i] = |
| 110 | gxp_read_32(gxp, GXP_REG_CORE_PD + CORE_PD_BASE(i)); |
| 111 | } |
| 112 | |
| 113 | common_regs->global_counter_low = |
| 114 | gxp_read_32(gxp, GXP_REG_GLOBAL_COUNTER_LOW); |
| 115 | common_regs->global_counter_high = |
| 116 | gxp_read_32(gxp, GXP_REG_GLOBAL_COUNTER_HIGH); |
| 117 | common_regs->wdog_control = gxp_read_32(gxp, GXP_REG_WDOG_CONTROL); |
| 118 | common_regs->wdog_value = gxp_read_32(gxp, GXP_REG_WDOG_VALUE); |
| 119 | |
| 120 | for (i = 0; i < TIMER_COUNT; i++) { |
| 121 | addr = GXP_REG_TIMER_COMPARATOR + TIMER_BASE(i); |
| 122 | common_regs->timer[i].comparator = |
| 123 | gxp_read_32(gxp, addr + TIMER_COMPARATOR_OFFSET); |
| 124 | common_regs->timer[i].control = |
| 125 | gxp_read_32(gxp, addr + TIMER_CONTROL_OFFSET); |
| 126 | common_regs->timer[i].value = |
| 127 | gxp_read_32(gxp, addr + TIMER_VALUE_OFFSET); |
| 128 | } |
| 129 | |
| 130 | /* Get Doorbell registers */ |
| 131 | for (i = 0; i < DOORBELL_COUNT; i++) |
| 132 | common_regs->doorbell[i] = gxp_doorbell_status(gxp, i); |
| 133 | |
| 134 | /* Get Sync Barrier registers */ |
| 135 | for (i = 0; i < SYNC_BARRIER_COUNT; i++) |
| 136 | common_regs->sync_barrier[i] = |
| 137 | gxp_read_sync_barrier_shadow(gxp, i); |
| 138 | |
| 139 | dev_dbg(gxp->dev, "Done getting common registers\n"); |
| 140 | } |
| 141 | |
| 142 | static void gxp_get_lpm_psm_registers(struct gxp_dev *gxp, |
| 143 | struct gxp_lpm_psm_registers *psm_regs, |
| 144 | int psm) |
| 145 | { |
| 146 | struct gxp_lpm_state_table_registers *state_table_regs; |
| 147 | int i, j; |
| 148 | uint offset; |
| 149 | |
| 150 | /* Get State Table registers */ |
| 151 | for (i = 0; i < PSM_STATE_TABLE_COUNT; i++) { |
| 152 | state_table_regs = &psm_regs->state_table[i]; |
| 153 | |
| 154 | /* Get Trans registers */ |
| 155 | for (j = 0; j < PSM_TRANS_COUNT; j++) { |
| 156 | offset = PSM_STATE_TABLE_BASE(i) + PSM_TRANS_BASE(j); |
| 157 | state_table_regs->trans[j].next_state = |
| 158 | lpm_read_32_psm(gxp, psm, offset + |
| 159 | PSM_NEXT_STATE_OFFSET); |
| 160 | state_table_regs->trans[j].seq_addr = |
| 161 | lpm_read_32_psm(gxp, psm, offset + |
| 162 | PSM_SEQ_ADDR_OFFSET); |
| 163 | state_table_regs->trans[j].timer_val = |
| 164 | lpm_read_32_psm(gxp, psm, offset + |
| 165 | PSM_TIMER_VAL_OFFSET); |
| 166 | state_table_regs->trans[j].timer_en = |
| 167 | lpm_read_32_psm(gxp, psm, offset + |
| 168 | PSM_TIMER_EN_OFFSET); |
| 169 | state_table_regs->trans[j].trigger_num = |
| 170 | lpm_read_32_psm(gxp, psm, offset + |
| 171 | PSM_TRIGGER_NUM_OFFSET); |
| 172 | state_table_regs->trans[j].trigger_en = |
| 173 | lpm_read_32_psm(gxp, psm, offset + |
| 174 | PSM_TRIGGER_EN_OFFSET); |
| 175 | } |
| 176 | |
| 177 | state_table_regs->enable_state = |
| 178 | lpm_read_32_psm(gxp, psm, PSM_STATE_TABLE_BASE(i) + |
| 179 | PSM_ENABLE_STATE_OFFSET); |
| 180 | } |
| 181 | |
| 182 | /* Get DMEM registers */ |
| 183 | for (i = 0; i < PSM_DATA_COUNT; i++) { |
| 184 | offset = PSM_DMEM_BASE(i) + PSM_DATA_OFFSET; |
| 185 | psm_regs->data[i] = lpm_read_32_psm(gxp, psm, offset); |
| 186 | } |
| 187 | |
| 188 | psm_regs->cfg = lpm_read_32_psm(gxp, psm, PSM_CFG_OFFSET); |
| 189 | psm_regs->status = lpm_read_32_psm(gxp, psm, PSM_STATUS_OFFSET); |
| 190 | |
| 191 | /* Get Debug CSR registers */ |
| 192 | psm_regs->debug_cfg = lpm_read_32_psm(gxp, psm, PSM_DEBUG_CFG_OFFSET); |
| 193 | psm_regs->break_addr = lpm_read_32_psm(gxp, psm, PSM_BREAK_ADDR_OFFSET); |
| 194 | psm_regs->gpin_lo_rd = lpm_read_32_psm(gxp, psm, PSM_GPIN_LO_RD_OFFSET); |
| 195 | psm_regs->gpin_hi_rd = lpm_read_32_psm(gxp, psm, PSM_GPIN_HI_RD_OFFSET); |
| 196 | psm_regs->gpout_lo_rd = |
| 197 | lpm_read_32_psm(gxp, psm, PSM_GPOUT_LO_RD_OFFSET); |
| 198 | psm_regs->gpout_hi_rd = |
| 199 | lpm_read_32_psm(gxp, psm, PSM_GPOUT_HI_RD_OFFSET); |
| 200 | psm_regs->debug_status = |
| 201 | lpm_read_32_psm(gxp, psm, PSM_DEBUG_STATUS_OFFSET); |
| 202 | } |
| 203 | |
| 204 | static void |
| 205 | gxp_get_lpm_registers(struct gxp_dev *gxp, struct gxp_seg_header *seg_header, |
| 206 | struct gxp_lpm_registers *lpm_regs) |
| 207 | { |
| 208 | int i; |
| 209 | uint offset; |
| 210 | |
| 211 | dev_dbg(gxp->dev, "Getting LPM registers\n"); |
| 212 | |
| 213 | strscpy(seg_header->name, "LPM Registers", sizeof(seg_header->name)); |
| 214 | seg_header->valid = 1; |
| 215 | seg_header->size = sizeof(*lpm_regs); |
| 216 | |
| 217 | /* Get LPM Descriptor registers */ |
| 218 | lpm_regs->lpm_version = lpm_read_32(gxp, LPM_VERSION_OFFSET); |
| 219 | lpm_regs->trigger_csr_start = |
| 220 | lpm_read_32(gxp, TRIGGER_CSR_START_OFFSET); |
| 221 | lpm_regs->imem_start = lpm_read_32(gxp, IMEM_START_OFFSET); |
| 222 | lpm_regs->lpm_config = lpm_read_32(gxp, LPM_CONFIG_OFFSET); |
| 223 | |
| 224 | for (i = 0; i < PSM_DESCRIPTOR_COUNT; i++) { |
| 225 | offset = PSM_DESCRIPTOR_OFFSET + PSM_DESCRIPTOR_BASE(i); |
| 226 | lpm_regs->psm_descriptor[i] = lpm_read_32(gxp, offset); |
| 227 | } |
| 228 | |
| 229 | /* Get Trigger CSR registers */ |
| 230 | for (i = 0; i < EVENTS_EN_COUNT; i++) { |
| 231 | offset = EVENTS_EN_OFFSET + EVENTS_EN_BASE(i); |
| 232 | lpm_regs->events_en[i] = lpm_read_32(gxp, offset); |
| 233 | } |
| 234 | |
| 235 | for (i = 0; i < EVENTS_INV_COUNT; i++) { |
| 236 | offset = EVENTS_INV_OFFSET + EVENTS_INV_BASE(i); |
| 237 | lpm_regs->events_inv[i] = lpm_read_32(gxp, offset); |
| 238 | } |
| 239 | |
| 240 | lpm_regs->function_select = lpm_read_32(gxp, FUNCTION_SELECT_OFFSET); |
| 241 | lpm_regs->trigger_status = lpm_read_32(gxp, TRIGGER_STATUS_OFFSET); |
| 242 | lpm_regs->event_status = lpm_read_32(gxp, EVENT_STATUS_OFFSET); |
| 243 | |
| 244 | /* Get IMEM registers */ |
| 245 | for (i = 0; i < OPS_COUNT; i++) { |
| 246 | offset = OPS_OFFSET + OPS_BASE(i); |
| 247 | lpm_regs->ops[i] = lpm_read_32(gxp, offset); |
| 248 | } |
| 249 | |
| 250 | /* Get PSM registers */ |
| 251 | for (i = 0; i < PSM_COUNT; i++) |
| 252 | gxp_get_lpm_psm_registers(gxp, &lpm_regs->psm_regs[i], i); |
| 253 | |
| 254 | dev_dbg(gxp->dev, "Done getting LPM registers\n"); |
| 255 | } |
| 256 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 257 | /* |
| 258 | * Caller must make sure that gxp->debug_dump_mgr->common_dump is not NULL. |
| 259 | */ |
| 260 | static int gxp_get_common_dump(struct gxp_dev *gxp) |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 261 | { |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 262 | struct gxp_common_dump *common_dump = gxp->debug_dump_mgr->common_dump; |
| 263 | struct gxp_seg_header *common_seg_header = common_dump->seg_header; |
| 264 | struct gxp_common_dump_data *common_dump_data = |
| 265 | &common_dump->common_dump_data; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 266 | int ret; |
| 267 | |
| 268 | /* Power on BLK_AUR to read the common registers */ |
| 269 | ret = gxp_wakelock_acquire(gxp); |
| 270 | if (ret) { |
| 271 | dev_err(gxp->dev, |
| 272 | "Failed to acquire wakelock for getting common dump\n"); |
| 273 | return ret; |
| 274 | } |
| 275 | gxp_pm_update_requested_power_states(gxp, AUR_OFF, true, AUR_UUD, false, |
| 276 | AUR_MEM_UNDEFINED, |
| 277 | AUR_MEM_UNDEFINED); |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 278 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 279 | gxp_get_common_registers(gxp, |
| 280 | &common_seg_header[GXP_COMMON_REGISTERS_IDX], |
| 281 | &common_dump_data->common_regs); |
| 282 | gxp_get_lpm_registers(gxp, &common_seg_header[GXP_LPM_REGISTERS_IDX], |
| 283 | &common_dump_data->lpm_regs); |
| 284 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 285 | gxp_wakelock_release(gxp); |
| 286 | gxp_pm_update_requested_power_states(gxp, AUR_UUD, false, AUR_OFF, true, |
| 287 | AUR_MEM_UNDEFINED, |
| 288 | AUR_MEM_UNDEFINED); |
| 289 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 290 | dev_dbg(gxp->dev, "Segment Header for Common Segment\n"); |
| 291 | dev_dbg(gxp->dev, "Name: %s, Size: 0x%0x bytes, Valid :%0x\n", |
| 292 | common_seg_header->name, common_seg_header->size, |
| 293 | common_seg_header->valid); |
| 294 | dev_dbg(gxp->dev, "Register aurora_revision: 0x%0x\n", |
| 295 | common_dump_data->common_regs.aurora_revision); |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 296 | |
| 297 | return ret; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 300 | #if IS_ENABLED(CONFIG_SUBSYSTEM_COREDUMP) |
| 301 | static void gxp_send_to_sscd(struct gxp_dev *gxp, void *segs, int seg_cnt, |
Neela Chithirala | 6d71338 | 2022-03-03 05:17:38 +0000 | [diff] [blame] | 302 | const char *info) |
| 303 | { |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 304 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
| 305 | struct sscd_platform_data *pdata = |
| 306 | (struct sscd_platform_data *)mgr->sscd_pdata; |
| 307 | |
| 308 | if (!pdata->sscd_report) { |
| 309 | dev_err(gxp->dev, "Failed to generate coredump\n"); |
| 310 | return; |
| 311 | } |
| 312 | |
| 313 | if (pdata->sscd_report(gxp->debug_dump_mgr->sscd_dev, segs, seg_cnt, |
| 314 | SSCD_FLAGS_ELFARM64HDR, info)) { |
| 315 | dev_err(gxp->dev, "Unable to send the report to SSCD daemon\n"); |
| 316 | return; |
| 317 | } |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 318 | } |
| 319 | |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 320 | /* |
| 321 | * `user_bufs` is an input buffer containing up to GXP_NUM_BUFFER_MAPPINGS |
| 322 | * virtual addresses |
| 323 | */ |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 324 | static int gxp_add_user_buffer_to_segments(struct gxp_dev *gxp, |
| 325 | struct gxp_core_header *core_header, |
| 326 | int core_id, int seg_idx, |
| 327 | void *user_bufs[]) |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 328 | { |
| 329 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
| 330 | struct gxp_user_buffer user_buf; |
| 331 | int i; |
| 332 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 333 | for (i = 0; i < GXP_NUM_BUFFER_MAPPINGS; i++) { |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 334 | user_buf = core_header->user_bufs[i]; |
| 335 | if (user_buf.size == 0) |
| 336 | continue; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 337 | if (seg_idx >= GXP_NUM_SEGMENTS_PER_CORE) |
| 338 | return -EFAULT; |
| 339 | |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 340 | mgr->segs[core_id][seg_idx].addr = user_bufs[i]; |
| 341 | mgr->segs[core_id][seg_idx].size = user_buf.size; |
| 342 | seg_idx++; |
| 343 | } |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 344 | |
| 345 | return 0; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 348 | /* |
| 349 | * Caller must have locked `gxp->vd_semaphore` for reading. |
| 350 | */ |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 351 | static void gxp_user_buffers_vunmap(struct gxp_dev *gxp, |
| 352 | struct gxp_core_header *core_header) |
| 353 | { |
| 354 | struct gxp_virtual_device *vd; |
| 355 | struct gxp_user_buffer user_buf; |
| 356 | int i; |
| 357 | struct gxp_mapping *mapping; |
| 358 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 359 | lockdep_assert_held(&gxp->vd_semaphore); |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 360 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 361 | /* |
| 362 | * TODO (b/234172464): When implementing per-core debug dump locks, |
| 363 | * down_read(&gxp->vd_semaphore) must be re-added before accessing |
| 364 | * gxp->core_to_vd[], and up_read(&gxp->vd_semaphore) must be re-added |
| 365 | * after. |
| 366 | */ |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 367 | vd = gxp->core_to_vd[core_header->core_id]; |
| 368 | if (!vd) { |
| 369 | dev_err(gxp->dev, "Virtual device is not available for vunmap\n"); |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 370 | return; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | for (i = 0; i < GXP_NUM_BUFFER_MAPPINGS; i++) { |
| 374 | user_buf = core_header->user_bufs[i]; |
| 375 | if (user_buf.size == 0) |
| 376 | continue; |
| 377 | |
| 378 | mapping = gxp_vd_mapping_search_in_range( |
| 379 | vd, (dma_addr_t)user_buf.device_addr); |
| 380 | if (!mapping) { |
| 381 | dev_err(gxp->dev, |
| 382 | "No mapping found for user buffer at device address %#llX\n", |
| 383 | user_buf.device_addr); |
| 384 | continue; |
| 385 | } |
| 386 | |
| 387 | gxp_mapping_vunmap(mapping); |
| 388 | gxp_mapping_put(mapping); |
| 389 | } |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 392 | /* |
| 393 | * Caller must have locked `gxp->vd_semaphore` for reading. |
| 394 | */ |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 395 | static int gxp_user_buffers_vmap(struct gxp_dev *gxp, |
| 396 | struct gxp_core_header *core_header, |
| 397 | void *user_buf_vaddrs[]) |
| 398 | { |
| 399 | struct gxp_virtual_device *vd; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 400 | struct gxp_user_buffer *user_buf; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 401 | int i, cnt = 0; |
| 402 | dma_addr_t daddr; |
| 403 | struct gxp_mapping *mapping; |
| 404 | void *vaddr; |
| 405 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 406 | lockdep_assert_held(&gxp->vd_semaphore); |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 407 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 408 | /* |
| 409 | * TODO (b/234172464): When implementing per-core debug dump locks, |
| 410 | * down_read(&gxp->vd_semaphore) must be re-added before accessing |
| 411 | * gxp->core_to_vd[], and up_read(&gxp->vd_semaphore) must be re-added |
| 412 | * after. |
| 413 | */ |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 414 | vd = gxp->core_to_vd[core_header->core_id]; |
| 415 | if (!vd) { |
| 416 | dev_err(gxp->dev, "Virtual device is not available for vmap\n"); |
| 417 | goto out; |
| 418 | } |
| 419 | |
| 420 | for (i = 0; i < GXP_NUM_BUFFER_MAPPINGS; i++) { |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 421 | user_buf = &core_header->user_bufs[i]; |
| 422 | if (user_buf->size == 0) |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 423 | continue; |
| 424 | |
| 425 | /* Get mapping */ |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 426 | daddr = (dma_addr_t)user_buf->device_addr; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 427 | mapping = gxp_vd_mapping_search_in_range(vd, daddr); |
| 428 | if (!mapping) { |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 429 | user_buf->size = 0; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 430 | continue; |
| 431 | } |
| 432 | |
| 433 | /* Map the mapping into kernel space */ |
| 434 | vaddr = gxp_mapping_vmap(mapping); |
| 435 | |
| 436 | /* |
| 437 | * Release the reference from searching for the mapping. |
| 438 | * Either vmapping was successful and obtained a new reference |
| 439 | * or vmapping failed, and the gxp_mapping is no longer needed. |
| 440 | */ |
| 441 | gxp_mapping_put(mapping); |
| 442 | |
| 443 | if (IS_ERR(vaddr)) { |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 444 | gxp_user_buffers_vunmap(gxp, core_header); |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | /* Get kernel address of the user buffer inside the mapping */ |
| 449 | user_buf_vaddrs[i] = |
| 450 | vaddr + daddr - |
| 451 | (mapping->device_address & ~(PAGE_SIZE - 1)); |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 452 | |
| 453 | /* Check that the entire user buffer is mapped */ |
| 454 | if ((user_buf_vaddrs[i] + user_buf->size) > |
| 455 | (vaddr + mapping->size)) { |
| 456 | gxp_user_buffers_vunmap(gxp, core_header); |
| 457 | return 0; |
| 458 | } |
| 459 | |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 460 | cnt++; |
| 461 | } |
| 462 | |
| 463 | out: |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 464 | return cnt; |
| 465 | } |
| 466 | #endif |
| 467 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 468 | static void gxp_invalidate_segments(struct gxp_dev *gxp, uint32_t core_id) |
| 469 | { |
| 470 | int i; |
| 471 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
| 472 | struct gxp_core_dump *core_dump; |
| 473 | struct gxp_common_dump *common_dump; |
| 474 | struct gxp_core_dump_header *core_dump_header; |
| 475 | |
| 476 | core_dump = mgr->core_dump; |
| 477 | common_dump = mgr->common_dump; |
| 478 | if (!core_dump || !common_dump) { |
| 479 | dev_dbg(gxp->dev, |
| 480 | "Failed to get core_dump or common_dump for invalidating segments\n"); |
| 481 | return; |
| 482 | } |
| 483 | |
| 484 | core_dump_header = &core_dump->core_dump_header[core_id]; |
| 485 | if (!core_dump_header) { |
| 486 | dev_dbg(gxp->dev, |
| 487 | "Failed to get core_dump_header for invalidating segments\n"); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | for (i = 0; i < GXP_NUM_COMMON_SEGMENTS; i++) |
| 492 | common_dump->seg_header[i].valid = 0; |
| 493 | |
| 494 | for (i = 0; i < GXP_NUM_CORE_SEGMENTS; i++) |
| 495 | core_dump_header->seg_header[i].valid = 0; |
| 496 | |
| 497 | for (i = 0; i < GXP_NUM_BUFFER_MAPPINGS; i++) |
| 498 | core_dump_header->core_header.user_bufs[i].size = 0; |
| 499 | |
| 500 | core_dump_header->core_header.dump_available = 0; |
| 501 | } |
| 502 | |
| 503 | /* |
| 504 | * Caller must make sure that gxp->debug_dump_mgr->common_dump and |
| 505 | * gxp->debug_dump_mgr->core_dump are not NULL. |
| 506 | */ |
| 507 | static int gxp_handle_debug_dump(struct gxp_dev *gxp, uint32_t core_id) |
Neela Chithirala | 6d71338 | 2022-03-03 05:17:38 +0000 | [diff] [blame] | 508 | { |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 509 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 510 | struct gxp_core_dump *core_dump = mgr->core_dump; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 511 | struct gxp_core_dump_header *core_dump_header = |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 512 | &core_dump->core_dump_header[core_id]; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 513 | struct gxp_core_header *core_header = &core_dump_header->core_header; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 514 | int ret = 0; |
| 515 | #if IS_ENABLED(CONFIG_SUBSYSTEM_COREDUMP) |
| 516 | struct gxp_common_dump *common_dump = mgr->common_dump; |
| 517 | int i; |
| 518 | int seg_idx = 0; |
| 519 | void *data_addr; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 520 | char sscd_msg[SSCD_MSG_LENGTH]; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 521 | void *user_buf_vaddrs[GXP_NUM_BUFFER_MAPPINGS]; |
| 522 | int user_buf_cnt; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 523 | #endif |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 524 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 525 | /* Core */ |
| 526 | if (!core_header->dump_available) { |
| 527 | dev_err(gxp->dev, "Core dump should have been available\n"); |
| 528 | ret = -EINVAL; |
| 529 | goto out; |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 530 | } |
| 531 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 532 | #if IS_ENABLED(CONFIG_SUBSYSTEM_COREDUMP) |
| 533 | /* Common */ |
| 534 | data_addr = &common_dump->common_dump_data.common_regs; |
| 535 | for (i = 0; i < GXP_NUM_COMMON_SEGMENTS; i++) { |
| 536 | if (seg_idx >= GXP_NUM_SEGMENTS_PER_CORE) { |
| 537 | ret = -EFAULT; |
| 538 | goto out_efault; |
| 539 | } |
| 540 | mgr->segs[core_id][seg_idx].addr = data_addr; |
| 541 | mgr->segs[core_id][seg_idx].size = |
| 542 | common_dump->seg_header[i].size; |
| 543 | data_addr += mgr->segs[core_id][seg_idx].size; |
| 544 | seg_idx++; |
| 545 | } |
Aurora pro automerger | 35e3403 | 2022-05-14 14:55:22 -0700 | [diff] [blame] | 546 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 547 | /* Core Header */ |
| 548 | if (seg_idx >= GXP_NUM_SEGMENTS_PER_CORE) { |
| 549 | ret = -EFAULT; |
| 550 | goto out_efault; |
| 551 | } |
| 552 | mgr->segs[core_id][seg_idx].addr = core_header; |
| 553 | mgr->segs[core_id][seg_idx].size = sizeof(struct gxp_core_header); |
| 554 | seg_idx++; |
| 555 | |
| 556 | data_addr = &core_dump->dump_data[core_id * |
| 557 | core_header->core_dump_size / |
| 558 | sizeof(u32)]; |
| 559 | |
| 560 | for (i = 0; i < GXP_NUM_CORE_SEGMENTS - 1; i++) { |
| 561 | if (seg_idx >= GXP_NUM_SEGMENTS_PER_CORE) { |
| 562 | ret = -EFAULT; |
| 563 | goto out_efault; |
| 564 | } |
| 565 | mgr->segs[core_id][seg_idx].addr = data_addr; |
| 566 | mgr->segs[core_id][seg_idx].size = 0; |
| 567 | if (core_dump_header->seg_header[i].valid) { |
| 568 | mgr->segs[core_id][seg_idx].size = |
| 569 | core_dump_header->seg_header[i].size; |
| 570 | } |
| 571 | |
| 572 | data_addr += core_dump_header->seg_header[i].size; |
| 573 | seg_idx++; |
| 574 | } |
| 575 | |
| 576 | /* DRAM */ |
| 577 | if (seg_idx >= GXP_NUM_SEGMENTS_PER_CORE) { |
| 578 | ret = -EFAULT; |
| 579 | goto out_efault; |
| 580 | } |
| 581 | mgr->segs[core_id][seg_idx].addr = gxp->fwbufs[core_id].vaddr; |
| 582 | mgr->segs[core_id][seg_idx].size = gxp->fwbufs[core_id].size; |
| 583 | seg_idx++; |
| 584 | |
| 585 | /* User Buffers */ |
| 586 | user_buf_cnt = gxp_user_buffers_vmap(gxp, core_header, user_buf_vaddrs); |
| 587 | if (user_buf_cnt > 0) { |
| 588 | if (gxp_add_user_buffer_to_segments(gxp, core_header, core_id, |
| 589 | seg_idx, user_buf_vaddrs)) { |
| 590 | gxp_user_buffers_vunmap(gxp, core_header); |
| 591 | ret = -EFAULT; |
| 592 | goto out_efault; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | out_efault: |
| 597 | if (ret) { |
| 598 | dev_err(gxp->dev, |
| 599 | "seg_idx %x is larger than the size of the array\n", |
| 600 | seg_idx); |
| 601 | } else { |
| 602 | dev_dbg(gxp->dev, "Passing dump data to SSCD daemon\n"); |
| 603 | snprintf(sscd_msg, SSCD_MSG_LENGTH - 1, |
| 604 | "gxp debug dump (core %0x)", core_id); |
| 605 | gxp_send_to_sscd(gxp, mgr->segs[core_id], |
| 606 | seg_idx + user_buf_cnt, sscd_msg); |
| 607 | |
| 608 | gxp_user_buffers_vunmap(gxp, core_header); |
| 609 | } |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 610 | #endif |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 611 | |
| 612 | out: |
| 613 | gxp_invalidate_segments(gxp, core_id); |
| 614 | |
| 615 | return ret; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 616 | } |
| 617 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 618 | static int gxp_init_segments(struct gxp_dev *gxp) |
Neela Chithirala | 6d71338 | 2022-03-03 05:17:38 +0000 | [diff] [blame] | 619 | { |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 620 | #if !IS_ENABLED(CONFIG_SUBSYSTEM_COREDUMP) |
| 621 | return 0; |
| 622 | #else |
| 623 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 624 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 625 | mgr->common_dump = kzalloc(sizeof(*mgr->common_dump), GFP_KERNEL); |
| 626 | if (!mgr->common_dump) |
| 627 | return -ENOMEM; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 628 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 629 | return 0; |
| 630 | #endif |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 631 | } |
| 632 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 633 | /* |
| 634 | * Caller must have locked `gxp->debug_dump_mgr->debug_dump_lock` before calling |
| 635 | * `gxp_generate_coredump`. |
| 636 | */ |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 637 | static int gxp_generate_coredump(struct gxp_dev *gxp, uint32_t core_id) |
| 638 | { |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 639 | int ret = 0; |
| 640 | |
| 641 | if (!gxp->debug_dump_mgr->core_dump || |
| 642 | !gxp->debug_dump_mgr->common_dump) { |
| 643 | dev_err(gxp->dev, "Memory is not allocated for debug dump\n"); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 644 | return -EINVAL; |
| 645 | } |
| 646 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 647 | gxp_debug_dump_cache_invalidate(gxp); |
| 648 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 649 | ret = gxp_get_common_dump(gxp); |
| 650 | if (ret) |
| 651 | goto out; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 652 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 653 | ret = gxp_handle_debug_dump(gxp, core_id); |
| 654 | if (ret) |
| 655 | goto out; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 656 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 657 | out: |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 658 | gxp_debug_dump_cache_flush(gxp); |
| 659 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 660 | return ret; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 661 | } |
| 662 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 663 | static void gxp_debug_dump_process_dump(struct work_struct *work) |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 664 | { |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 665 | struct gxp_debug_dump_work *debug_dump_work = |
| 666 | container_of(work, struct gxp_debug_dump_work, work); |
| 667 | |
| 668 | uint core_id = debug_dump_work->core_id; |
| 669 | struct gxp_dev *gxp = debug_dump_work->gxp; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 670 | u32 boot_mode; |
| 671 | bool gxp_generate_coredump_called = false; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 672 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 673 | mutex_lock(&gxp->debug_dump_mgr->debug_dump_lock); |
| 674 | |
| 675 | /* |
| 676 | * Lock the VD semaphore to ensure no suspend/resume/start/stop requests |
| 677 | * can be made on core `core_id` while generating debug dump. |
| 678 | * However, since VD semaphore is used by other VDs as well, it can |
| 679 | * potentially block device creation and destruction for other cores. |
| 680 | * TODO (b/234172464): Implement per-core debug dump locks and |
| 681 | * lock/unlock vd_semaphore before/after accessing gxp->core_to_vd[]. |
| 682 | */ |
| 683 | down_read(&gxp->vd_semaphore); |
| 684 | |
| 685 | boot_mode = gxp_firmware_get_boot_mode(gxp, core_id); |
| 686 | |
| 687 | if (gxp_is_fw_running(gxp, core_id) && |
| 688 | (boot_mode == GXP_BOOT_MODE_STATUS_COLD_BOOT_COMPLETED || |
| 689 | boot_mode == GXP_BOOT_MODE_STATUS_RESUME_COMPLETED)) { |
| 690 | gxp_generate_coredump_called = true; |
| 691 | if (gxp_generate_coredump(gxp, core_id)) |
| 692 | dev_err(gxp->dev, "Failed to generate coredump\n"); |
| 693 | } |
| 694 | |
| 695 | /* Invalidate segments to prepare for the next debug dump trigger */ |
| 696 | gxp_invalidate_segments(gxp, core_id); |
| 697 | |
| 698 | up_read(&gxp->vd_semaphore); |
| 699 | |
| 700 | /* |
| 701 | * This delay is needed to ensure there's sufficient time |
| 702 | * in between sscd_report() being called, as the file name of |
| 703 | * the core dump files generated by the SSCD daemon includes a |
| 704 | * time format with a seconds precision. |
| 705 | */ |
| 706 | if (gxp_generate_coredump_called) |
| 707 | msleep(1000); |
| 708 | |
| 709 | mutex_unlock(&gxp->debug_dump_mgr->debug_dump_lock); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 710 | } |
| 711 | |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 712 | struct work_struct *gxp_debug_dump_get_notification_handler(struct gxp_dev *gxp, |
| 713 | uint core) |
| 714 | { |
| 715 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
| 716 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 717 | if (!gxp_debug_dump_is_enabled()) |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 718 | return NULL; |
| 719 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 720 | if (!mgr->buf.vaddr) { |
| 721 | dev_err(gxp->dev, |
| 722 | "Debug dump must be initialized before %s is called\n", |
| 723 | __func__); |
| 724 | return NULL; |
| 725 | } |
| 726 | |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 727 | return &mgr->debug_dump_works[core].work; |
| 728 | } |
| 729 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 730 | int gxp_debug_dump_init(struct gxp_dev *gxp, void *sscd_dev, void *sscd_pdata) |
| 731 | { |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 732 | struct gxp_debug_dump_manager *mgr; |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 733 | int core; |
| 734 | |
| 735 | /* Don't initialize the debug dump subsystem unless it's enabled. */ |
| 736 | if (!gxp_debug_dump_enable) |
| 737 | return 0; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 738 | |
| 739 | mgr = devm_kzalloc(gxp->dev, sizeof(*mgr), GFP_KERNEL); |
| 740 | if (!mgr) |
| 741 | return -ENOMEM; |
| 742 | gxp->debug_dump_mgr = mgr; |
| 743 | mgr->gxp = gxp; |
| 744 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 745 | mgr->buf.vaddr = |
| 746 | gxp_dma_alloc_coherent(gxp, NULL, 0, DEBUG_DUMP_MEMORY_SIZE, |
| 747 | &mgr->buf.daddr, GFP_KERNEL, 0); |
| 748 | if (!mgr->buf.vaddr) { |
| 749 | dev_err(gxp->dev, "Failed to allocate memory for debug dump\n"); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 750 | return -ENODEV; |
| 751 | } |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 752 | mgr->buf.size = DEBUG_DUMP_MEMORY_SIZE; |
| 753 | |
| 754 | mgr->core_dump = (struct gxp_core_dump *)mgr->buf.vaddr; |
| 755 | |
| 756 | gxp_init_segments(gxp); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 757 | |
| 758 | for (core = 0; core < GXP_NUM_CORES; core++) { |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 759 | gxp_invalidate_segments(gxp, core); |
Neela Chithirala | 3ccb247 | 2022-01-17 04:41:54 +0000 | [diff] [blame] | 760 | mgr->debug_dump_works[core].gxp = gxp; |
| 761 | mgr->debug_dump_works[core].core_id = core; |
| 762 | INIT_WORK(&mgr->debug_dump_works[core].work, |
| 763 | gxp_debug_dump_process_dump); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | /* No need for a DMA handle since the carveout is coherent */ |
| 767 | mgr->debug_dump_dma_handle = 0; |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 768 | mgr->sscd_dev = sscd_dev; |
| 769 | mgr->sscd_pdata = sscd_pdata; |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 770 | mutex_init(&mgr->debug_dump_lock); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 771 | |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 772 | return 0; |
| 773 | } |
| 774 | |
| 775 | void gxp_debug_dump_exit(struct gxp_dev *gxp) |
| 776 | { |
| 777 | struct gxp_debug_dump_manager *mgr = gxp->debug_dump_mgr; |
| 778 | |
| 779 | if (!mgr) { |
| 780 | dev_dbg(gxp->dev, "Debug dump manager was not allocated\n"); |
| 781 | return; |
| 782 | } |
| 783 | |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 784 | kfree(gxp->debug_dump_mgr->common_dump); |
| 785 | gxp_dma_free_coherent(gxp, NULL, 0, DEBUG_DUMP_MEMORY_SIZE, |
| 786 | mgr->buf.vaddr, mgr->buf.daddr); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 787 | |
Neela Chithirala | 4908742 | 2022-02-14 03:48:34 +0000 | [diff] [blame] | 788 | mutex_destroy(&mgr->debug_dump_lock); |
John Scheible | de16475 | 2021-10-26 13:45:19 -0700 | [diff] [blame] | 789 | devm_kfree(mgr->gxp->dev, mgr); |
| 790 | gxp->debug_dump_mgr = NULL; |
| 791 | } |
Aurora pro automerger | 399265c | 2022-06-14 13:50:26 -0700 | [diff] [blame] | 792 | |
| 793 | bool gxp_debug_dump_is_enabled(void) |
| 794 | { |
| 795 | return gxp_debug_dump_enable; |
| 796 | } |