1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include "xe_debugfs.h" 7 8 #include <linux/debugfs.h> 9 #include <linux/fault-inject.h> 10 #include <linux/string_helpers.h> 11 12 #include <drm/drm_debugfs.h> 13 14 #include "regs/xe_pmt.h" 15 #include "xe_bo.h" 16 #include "xe_device.h" 17 #include "xe_force_wake.h" 18 #include "xe_gt_debugfs.h" 19 #include "xe_gt_printk.h" 20 #include "xe_guc_ads.h" 21 #include "xe_mmio.h" 22 #include "xe_pm.h" 23 #include "xe_psmi.h" 24 #include "xe_pxp_debugfs.h" 25 #include "xe_sriov.h" 26 #include "xe_sriov_pf.h" 27 #include "xe_step.h" 28 #include "xe_wa.h" 29 #include "xe_vsec.h" 30 31 #ifdef CONFIG_DRM_XE_DEBUG 32 #include "xe_bo_evict.h" 33 #include "xe_migrate.h" 34 #include "xe_vm.h" 35 #endif 36 37 DECLARE_FAULT_ATTR(gt_reset_failure); 38 DECLARE_FAULT_ATTR(inject_csc_hw_error); 39 40 static void read_residency_counter(struct xe_device *xe, struct xe_mmio *mmio, 41 u32 offset, char *name, struct drm_printer *p) 42 { 43 u64 residency = 0; 44 int ret; 45 46 ret = xe_pmt_telem_read(to_pci_dev(xe->drm.dev), 47 xe_mmio_read32(mmio, PUNIT_TELEMETRY_GUID), 48 &residency, offset, sizeof(residency)); 49 if (ret != sizeof(residency)) { 50 drm_warn(&xe->drm, "%s counter failed to read, ret %d\n", name, ret); 51 return; 52 } 53 54 drm_printf(p, "%s : %llu\n", name, residency); 55 } 56 57 static struct xe_device *node_to_xe(struct drm_info_node *node) 58 { 59 return to_xe_device(node->minor->dev); 60 } 61 62 static int info(struct seq_file *m, void *data) 63 { 64 struct xe_device *xe = node_to_xe(m->private); 65 struct drm_printer p = drm_seq_file_printer(m); 66 struct xe_gt *gt; 67 u8 id; 68 69 xe_pm_runtime_get(xe); 70 71 drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100); 72 drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100); 73 drm_printf(&p, "stepping G:%s M:%s B:%s\n", 74 xe_step_name(xe->info.step.graphics), 75 xe_step_name(xe->info.step.media), 76 xe_step_name(xe->info.step.basedie)); 77 drm_printf(&p, "is_dgfx %s\n", str_yes_no(xe->info.is_dgfx)); 78 drm_printf(&p, "platform %d\n", xe->info.platform); 79 drm_printf(&p, "subplatform %d\n", 80 xe->info.subplatform > XE_SUBPLATFORM_NONE ? xe->info.subplatform : 0); 81 drm_printf(&p, "devid 0x%x\n", xe->info.devid); 82 drm_printf(&p, "revid %d\n", xe->info.revid); 83 drm_printf(&p, "tile_count %d\n", xe->info.tile_count); 84 drm_printf(&p, "vm_max_level %d\n", xe->info.vm_max_level); 85 drm_printf(&p, "force_execlist %s\n", str_yes_no(xe->info.force_execlist)); 86 drm_printf(&p, "has_flat_ccs %s\n", str_yes_no(xe->info.has_flat_ccs)); 87 drm_printf(&p, "has_usm %s\n", str_yes_no(xe->info.has_usm)); 88 drm_printf(&p, "skip_guc_pc %s\n", str_yes_no(xe->info.skip_guc_pc)); 89 for_each_gt(gt, xe, id) { 90 drm_printf(&p, "gt%d force wake %d\n", id, 91 xe_force_wake_ref(gt_to_fw(gt), XE_FW_GT)); 92 drm_printf(&p, "gt%d engine_mask 0x%llx\n", id, 93 gt->info.engine_mask); 94 } 95 96 xe_pm_runtime_put(xe); 97 return 0; 98 } 99 100 static int sriov_info(struct seq_file *m, void *data) 101 { 102 struct xe_device *xe = node_to_xe(m->private); 103 struct drm_printer p = drm_seq_file_printer(m); 104 105 xe_sriov_print_info(xe, &p); 106 return 0; 107 } 108 109 static int workarounds(struct xe_device *xe, struct drm_printer *p) 110 { 111 xe_pm_runtime_get(xe); 112 xe_wa_device_dump(xe, p); 113 xe_pm_runtime_put(xe); 114 115 return 0; 116 } 117 118 static int workaround_info(struct seq_file *m, void *data) 119 { 120 struct xe_device *xe = node_to_xe(m->private); 121 struct drm_printer p = drm_seq_file_printer(m); 122 123 workarounds(xe, &p); 124 return 0; 125 } 126 127 static int dgfx_pkg_residencies_show(struct seq_file *m, void *data) 128 { 129 struct xe_device *xe; 130 struct xe_mmio *mmio; 131 struct drm_printer p; 132 133 xe = node_to_xe(m->private); 134 p = drm_seq_file_printer(m); 135 xe_pm_runtime_get(xe); 136 mmio = xe_root_tile_mmio(xe); 137 struct { 138 u32 offset; 139 char *name; 140 } residencies[] = { 141 {BMG_G2_RESIDENCY_OFFSET, "Package G2"}, 142 {BMG_G6_RESIDENCY_OFFSET, "Package G6"}, 143 {BMG_G8_RESIDENCY_OFFSET, "Package G8"}, 144 {BMG_G10_RESIDENCY_OFFSET, "Package G10"}, 145 {BMG_MODS_RESIDENCY_OFFSET, "Package ModS"} 146 }; 147 148 for (int i = 0; i < ARRAY_SIZE(residencies); i++) 149 read_residency_counter(xe, mmio, residencies[i].offset, residencies[i].name, &p); 150 151 xe_pm_runtime_put(xe); 152 return 0; 153 } 154 155 static int dgfx_pcie_link_residencies_show(struct seq_file *m, void *data) 156 { 157 struct xe_device *xe; 158 struct xe_mmio *mmio; 159 struct drm_printer p; 160 161 xe = node_to_xe(m->private); 162 p = drm_seq_file_printer(m); 163 xe_pm_runtime_get(xe); 164 mmio = xe_root_tile_mmio(xe); 165 166 struct { 167 u32 offset; 168 char *name; 169 } residencies[] = { 170 {BMG_PCIE_LINK_L0_RESIDENCY_OFFSET, "PCIE LINK L0 RESIDENCY"}, 171 {BMG_PCIE_LINK_L1_RESIDENCY_OFFSET, "PCIE LINK L1 RESIDENCY"}, 172 {BMG_PCIE_LINK_L1_2_RESIDENCY_OFFSET, "PCIE LINK L1.2 RESIDENCY"} 173 }; 174 175 for (int i = 0; i < ARRAY_SIZE(residencies); i++) 176 read_residency_counter(xe, mmio, residencies[i].offset, residencies[i].name, &p); 177 178 xe_pm_runtime_put(xe); 179 return 0; 180 } 181 182 static const struct drm_info_list debugfs_list[] = { 183 {"info", info, 0}, 184 { .name = "sriov_info", .show = sriov_info, }, 185 { .name = "workarounds", .show = workaround_info, }, 186 }; 187 188 static const struct drm_info_list debugfs_residencies[] = { 189 { .name = "dgfx_pkg_residencies", .show = dgfx_pkg_residencies_show, }, 190 { .name = "dgfx_pcie_link_residencies", .show = dgfx_pcie_link_residencies_show, }, 191 }; 192 193 static int forcewake_open(struct inode *inode, struct file *file) 194 { 195 struct xe_device *xe = inode->i_private; 196 struct xe_gt *gt; 197 u8 id, last_gt; 198 unsigned int fw_ref; 199 200 xe_pm_runtime_get(xe); 201 for_each_gt(gt, xe, id) { 202 last_gt = id; 203 204 fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL); 205 if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) 206 goto err_fw_get; 207 } 208 209 return 0; 210 211 err_fw_get: 212 for_each_gt(gt, xe, id) { 213 if (id < last_gt) 214 xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL); 215 else if (id == last_gt) 216 xe_force_wake_put(gt_to_fw(gt), fw_ref); 217 else 218 break; 219 } 220 221 xe_pm_runtime_put(xe); 222 return -ETIMEDOUT; 223 } 224 225 static int forcewake_release(struct inode *inode, struct file *file) 226 { 227 struct xe_device *xe = inode->i_private; 228 struct xe_gt *gt; 229 u8 id; 230 231 for_each_gt(gt, xe, id) 232 xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL); 233 xe_pm_runtime_put(xe); 234 235 return 0; 236 } 237 238 static const struct file_operations forcewake_all_fops = { 239 .owner = THIS_MODULE, 240 .open = forcewake_open, 241 .release = forcewake_release, 242 }; 243 244 static ssize_t wedged_mode_show(struct file *f, char __user *ubuf, 245 size_t size, loff_t *pos) 246 { 247 struct xe_device *xe = file_inode(f)->i_private; 248 char buf[32]; 249 int len = 0; 250 251 len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode); 252 253 return simple_read_from_buffer(ubuf, size, pos, buf, len); 254 } 255 256 static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf, 257 size_t size, loff_t *pos) 258 { 259 struct xe_device *xe = file_inode(f)->i_private; 260 struct xe_gt *gt; 261 u32 wedged_mode; 262 ssize_t ret; 263 u8 id; 264 265 ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode); 266 if (ret) 267 return ret; 268 269 if (wedged_mode > 2) 270 return -EINVAL; 271 272 if (xe->wedged.mode == wedged_mode) 273 return size; 274 275 xe->wedged.mode = wedged_mode; 276 277 xe_pm_runtime_get(xe); 278 for_each_gt(gt, xe, id) { 279 ret = xe_guc_ads_scheduler_policy_toggle_reset(>->uc.guc.ads); 280 if (ret) { 281 xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n"); 282 xe_pm_runtime_put(xe); 283 return -EIO; 284 } 285 } 286 xe_pm_runtime_put(xe); 287 288 return size; 289 } 290 291 static const struct file_operations wedged_mode_fops = { 292 .owner = THIS_MODULE, 293 .read = wedged_mode_show, 294 .write = wedged_mode_set, 295 }; 296 297 static ssize_t atomic_svm_timeslice_ms_show(struct file *f, char __user *ubuf, 298 size_t size, loff_t *pos) 299 { 300 struct xe_device *xe = file_inode(f)->i_private; 301 char buf[32]; 302 int len = 0; 303 304 len = scnprintf(buf, sizeof(buf), "%d\n", xe->atomic_svm_timeslice_ms); 305 306 return simple_read_from_buffer(ubuf, size, pos, buf, len); 307 } 308 309 static ssize_t atomic_svm_timeslice_ms_set(struct file *f, 310 const char __user *ubuf, 311 size_t size, loff_t *pos) 312 { 313 struct xe_device *xe = file_inode(f)->i_private; 314 u32 atomic_svm_timeslice_ms; 315 ssize_t ret; 316 317 ret = kstrtouint_from_user(ubuf, size, 0, &atomic_svm_timeslice_ms); 318 if (ret) 319 return ret; 320 321 xe->atomic_svm_timeslice_ms = atomic_svm_timeslice_ms; 322 323 return size; 324 } 325 326 static const struct file_operations atomic_svm_timeslice_ms_fops = { 327 .owner = THIS_MODULE, 328 .read = atomic_svm_timeslice_ms_show, 329 .write = atomic_svm_timeslice_ms_set, 330 }; 331 332 static void create_tile_debugfs(struct xe_tile *tile, struct dentry *root) 333 { 334 char name[8]; 335 336 snprintf(name, sizeof(name), "tile%u", tile->id); 337 tile->debugfs = debugfs_create_dir(name, root); 338 if (IS_ERR(tile->debugfs)) 339 return; 340 341 /* 342 * Store the xe_tile pointer as private data of the tile/ directory 343 * node so other tile specific attributes under that directory may 344 * refer to it by looking at its parent node private data. 345 */ 346 tile->debugfs->d_inode->i_private = tile; 347 } 348 349 void xe_debugfs_register(struct xe_device *xe) 350 { 351 struct ttm_device *bdev = &xe->ttm; 352 struct drm_minor *minor = xe->drm.primary; 353 struct dentry *root = minor->debugfs_root; 354 struct ttm_resource_manager *man; 355 struct xe_tile *tile; 356 struct xe_gt *gt; 357 u32 mem_type; 358 u8 tile_id; 359 u8 id; 360 361 drm_debugfs_create_files(debugfs_list, 362 ARRAY_SIZE(debugfs_list), 363 root, minor); 364 365 if (xe->info.platform == XE_BATTLEMAGE) { 366 drm_debugfs_create_files(debugfs_residencies, 367 ARRAY_SIZE(debugfs_residencies), 368 root, minor); 369 fault_create_debugfs_attr("inject_csc_hw_error", root, 370 &inject_csc_hw_error); 371 } 372 373 debugfs_create_file("forcewake_all", 0400, root, xe, 374 &forcewake_all_fops); 375 376 debugfs_create_file("wedged_mode", 0600, root, xe, 377 &wedged_mode_fops); 378 379 debugfs_create_file("atomic_svm_timeslice_ms", 0600, root, xe, 380 &atomic_svm_timeslice_ms_fops); 381 382 for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { 383 man = ttm_manager_type(bdev, mem_type); 384 385 if (man) { 386 char name[16]; 387 388 snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0); 389 ttm_resource_manager_create_debugfs(man, root, name); 390 } 391 } 392 393 man = ttm_manager_type(bdev, XE_PL_TT); 394 ttm_resource_manager_create_debugfs(man, root, "gtt_mm"); 395 396 man = ttm_manager_type(bdev, XE_PL_STOLEN); 397 if (man) 398 ttm_resource_manager_create_debugfs(man, root, "stolen_mm"); 399 400 for_each_tile(tile, xe, tile_id) 401 create_tile_debugfs(tile, root); 402 403 for_each_gt(gt, xe, id) 404 xe_gt_debugfs_register(gt); 405 406 xe_pxp_debugfs_register(xe->pxp); 407 408 xe_psmi_debugfs_register(xe); 409 410 fault_create_debugfs_attr("fail_gt_reset", root, >_reset_failure); 411 412 if (IS_SRIOV_PF(xe)) 413 xe_sriov_pf_debugfs_register(xe, root); 414 } 415