1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include "xe_gt_debugfs.h" 7 8 #include <linux/debugfs.h> 9 10 #include <drm/drm_debugfs.h> 11 #include <drm/drm_managed.h> 12 13 #include "xe_device.h" 14 #include "xe_force_wake.h" 15 #include "xe_gt.h" 16 #include "xe_gt_mcr.h" 17 #include "xe_gt_idle.h" 18 #include "xe_gt_sriov_pf_debugfs.h" 19 #include "xe_gt_sriov_vf_debugfs.h" 20 #include "xe_gt_stats.h" 21 #include "xe_gt_topology.h" 22 #include "xe_guc_hwconfig.h" 23 #include "xe_hw_engine.h" 24 #include "xe_lrc.h" 25 #include "xe_macros.h" 26 #include "xe_mocs.h" 27 #include "xe_pat.h" 28 #include "xe_pm.h" 29 #include "xe_reg_sr.h" 30 #include "xe_reg_whitelist.h" 31 #include "xe_sa.h" 32 #include "xe_sriov.h" 33 #include "xe_sriov_vf_ccs.h" 34 #include "xe_tuning.h" 35 #include "xe_uc_debugfs.h" 36 #include "xe_wa.h" 37 38 static struct xe_gt *node_to_gt(struct drm_info_node *node) 39 { 40 return node->dent->d_parent->d_inode->i_private; 41 } 42 43 /** 44 * xe_gt_debugfs_simple_show - A show callback for struct drm_info_list 45 * @m: the &seq_file 46 * @data: data used by the drm debugfs helpers 47 * 48 * This callback can be used in struct drm_info_list to describe debugfs 49 * files that are &xe_gt specific. 50 * 51 * It is assumed that those debugfs files will be created on directory entry 52 * which struct dentry d_inode->i_private points to &xe_gt. 53 * 54 * This function assumes that &m->private will be set to the &struct 55 * drm_info_node corresponding to the instance of the info on a given &struct 56 * drm_minor (see struct drm_info_list.show for details). 57 * 58 * This function also assumes that struct drm_info_list.data will point to the 59 * function code that will actually print a file content:: 60 * 61 * int (*print)(struct xe_gt *, struct drm_printer *) 62 * 63 * Example:: 64 * 65 * int foo(struct xe_gt *gt, struct drm_printer *p) 66 * { 67 * drm_printf(p, "GT%u\n", gt->info.id); 68 * return 0; 69 * } 70 * 71 * static const struct drm_info_list bar[] = { 72 * { name = "foo", .show = xe_gt_debugfs_simple_show, .data = foo }, 73 * }; 74 * 75 * dir = debugfs_create_dir("gt", parent); 76 * dir->d_inode->i_private = gt; 77 * drm_debugfs_create_files(bar, ARRAY_SIZE(bar), dir, minor); 78 * 79 * Return: 0 on success or a negative error code on failure. 80 */ 81 int xe_gt_debugfs_simple_show(struct seq_file *m, void *data) 82 { 83 struct drm_printer p = drm_seq_file_printer(m); 84 struct drm_info_node *node = m->private; 85 struct xe_gt *gt = node_to_gt(node); 86 int (*print)(struct xe_gt *, struct drm_printer *) = node->info_ent->data; 87 88 if (WARN_ON(!print)) 89 return -EINVAL; 90 91 return print(gt, &p); 92 } 93 94 /** 95 * xe_gt_debugfs_show_with_rpm - A show callback for struct drm_info_list 96 * @m: the &seq_file 97 * @data: data used by the drm debugfs helpers 98 * 99 * Similar to xe_gt_debugfs_simple_show() but implicitly takes a RPM ref. 100 * 101 * Return: 0 on success or a negative error code on failure. 102 */ 103 int xe_gt_debugfs_show_with_rpm(struct seq_file *m, void *data) 104 { 105 struct drm_info_node *node = m->private; 106 struct xe_gt *gt = node_to_gt(node); 107 struct xe_device *xe = gt_to_xe(gt); 108 109 guard(xe_pm_runtime)(xe); 110 return xe_gt_debugfs_simple_show(m, data); 111 } 112 113 static int hw_engines(struct xe_gt *gt, struct drm_printer *p) 114 { 115 struct xe_hw_engine *hwe; 116 enum xe_hw_engine_id id; 117 118 CLASS(xe_force_wake, fw_ref)(gt_to_fw(gt), XE_FORCEWAKE_ALL); 119 if (!xe_force_wake_ref_has_domain(fw_ref.domains, XE_FORCEWAKE_ALL)) 120 return -ETIMEDOUT; 121 122 for_each_hw_engine(hwe, gt, id) 123 xe_hw_engine_print(hwe, p); 124 125 return 0; 126 } 127 128 static int steering(struct xe_gt *gt, struct drm_printer *p) 129 { 130 xe_gt_mcr_steering_dump(gt, p); 131 return 0; 132 } 133 134 static int register_save_restore(struct xe_gt *gt, struct drm_printer *p) 135 { 136 struct xe_hw_engine *hwe; 137 enum xe_hw_engine_id id; 138 139 xe_reg_sr_dump(>->reg_sr, p); 140 drm_printf(p, "\n"); 141 142 drm_printf(p, "Engine\n"); 143 for_each_hw_engine(hwe, gt, id) 144 xe_reg_sr_dump(&hwe->reg_sr, p); 145 drm_printf(p, "\n"); 146 147 drm_printf(p, "LRC\n"); 148 for_each_hw_engine(hwe, gt, id) 149 xe_reg_sr_dump(&hwe->reg_lrc, p); 150 drm_printf(p, "\n"); 151 152 drm_printf(p, "Whitelist\n"); 153 for_each_hw_engine(hwe, gt, id) 154 xe_reg_whitelist_dump(&hwe->reg_whitelist, p); 155 156 return 0; 157 } 158 159 static int rcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) 160 { 161 xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_RENDER); 162 return 0; 163 } 164 165 static int ccs_default_lrc(struct xe_gt *gt, struct drm_printer *p) 166 { 167 xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_COMPUTE); 168 return 0; 169 } 170 171 static int bcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) 172 { 173 xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_COPY); 174 return 0; 175 } 176 177 static int vcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) 178 { 179 xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_VIDEO_DECODE); 180 return 0; 181 } 182 183 static int vecs_default_lrc(struct xe_gt *gt, struct drm_printer *p) 184 { 185 xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_VIDEO_ENHANCE); 186 return 0; 187 } 188 189 static int hwconfig(struct xe_gt *gt, struct drm_printer *p) 190 { 191 xe_guc_hwconfig_dump(>->uc.guc, p); 192 return 0; 193 } 194 195 /* 196 * only for GT debugfs files which can be safely used on the VF as well: 197 * - without access to the GT privileged registers 198 * - without access to the PF specific data 199 */ 200 static const struct drm_info_list vf_safe_debugfs_list[] = { 201 { "topology", .show = xe_gt_debugfs_show_with_rpm, .data = xe_gt_topology_dump }, 202 { "register-save-restore", 203 .show = xe_gt_debugfs_show_with_rpm, .data = register_save_restore }, 204 { "workarounds", .show = xe_gt_debugfs_show_with_rpm, .data = xe_wa_gt_dump }, 205 { "tunings", .show = xe_gt_debugfs_show_with_rpm, .data = xe_tuning_dump }, 206 { "default_lrc_rcs", .show = xe_gt_debugfs_show_with_rpm, .data = rcs_default_lrc }, 207 { "default_lrc_ccs", .show = xe_gt_debugfs_show_with_rpm, .data = ccs_default_lrc }, 208 { "default_lrc_bcs", .show = xe_gt_debugfs_show_with_rpm, .data = bcs_default_lrc }, 209 { "default_lrc_vcs", .show = xe_gt_debugfs_show_with_rpm, .data = vcs_default_lrc }, 210 { "default_lrc_vecs", .show = xe_gt_debugfs_show_with_rpm, .data = vecs_default_lrc }, 211 { "hwconfig", .show = xe_gt_debugfs_show_with_rpm, .data = hwconfig }, 212 { "pat_sw_config", .show = xe_gt_debugfs_simple_show, .data = xe_pat_dump_sw_config }, 213 }; 214 215 /* everything else should be added here */ 216 static const struct drm_info_list pf_only_debugfs_list[] = { 217 { "hw_engines", .show = xe_gt_debugfs_show_with_rpm, .data = hw_engines }, 218 { "mocs", .show = xe_gt_debugfs_show_with_rpm, .data = xe_mocs_dump }, 219 { "pat", .show = xe_gt_debugfs_show_with_rpm, .data = xe_pat_dump }, 220 { "powergate_info", .show = xe_gt_debugfs_show_with_rpm, .data = xe_gt_idle_pg_print }, 221 { "steering", .show = xe_gt_debugfs_show_with_rpm, .data = steering }, 222 }; 223 224 static ssize_t write_to_gt_call(const char __user *userbuf, size_t count, loff_t *ppos, 225 void (*call)(struct xe_gt *), struct xe_gt *gt) 226 { 227 bool yes; 228 int ret; 229 230 if (*ppos) 231 return -EINVAL; 232 ret = kstrtobool_from_user(userbuf, count, &yes); 233 if (ret < 0) 234 return ret; 235 if (yes) 236 call(gt); 237 return count; 238 } 239 240 static ssize_t stats_write(struct file *file, const char __user *userbuf, 241 size_t count, loff_t *ppos) 242 { 243 struct seq_file *s = file->private_data; 244 struct xe_gt *gt = s->private; 245 246 return write_to_gt_call(userbuf, count, ppos, xe_gt_stats_clear, gt); 247 } 248 249 static int stats_show(struct seq_file *s, void *unused) 250 { 251 struct drm_printer p = drm_seq_file_printer(s); 252 struct xe_gt *gt = s->private; 253 254 return xe_gt_stats_print_info(gt, &p); 255 } 256 DEFINE_SHOW_STORE_ATTRIBUTE(stats); 257 258 static void force_reset(struct xe_gt *gt) 259 { 260 struct xe_device *xe = gt_to_xe(gt); 261 262 guard(xe_pm_runtime)(xe); 263 xe_gt_reset_async(gt); 264 } 265 266 static ssize_t force_reset_write(struct file *file, 267 const char __user *userbuf, 268 size_t count, loff_t *ppos) 269 { 270 struct seq_file *s = file->private_data; 271 struct xe_gt *gt = s->private; 272 273 return write_to_gt_call(userbuf, count, ppos, force_reset, gt); 274 } 275 276 static int force_reset_show(struct seq_file *s, void *unused) 277 { 278 struct xe_gt *gt = s->private; 279 280 force_reset(gt); /* to be deprecated! */ 281 return 0; 282 } 283 DEFINE_SHOW_STORE_ATTRIBUTE(force_reset); 284 285 static void force_reset_sync(struct xe_gt *gt) 286 { 287 struct xe_device *xe = gt_to_xe(gt); 288 289 guard(xe_pm_runtime)(xe); 290 xe_gt_reset(gt); 291 } 292 293 static ssize_t force_reset_sync_write(struct file *file, 294 const char __user *userbuf, 295 size_t count, loff_t *ppos) 296 { 297 struct seq_file *s = file->private_data; 298 struct xe_gt *gt = s->private; 299 300 return write_to_gt_call(userbuf, count, ppos, force_reset_sync, gt); 301 } 302 303 static int force_reset_sync_show(struct seq_file *s, void *unused) 304 { 305 struct xe_gt *gt = s->private; 306 307 force_reset_sync(gt); /* to be deprecated! */ 308 return 0; 309 } 310 DEFINE_SHOW_STORE_ATTRIBUTE(force_reset_sync); 311 312 void xe_gt_debugfs_register(struct xe_gt *gt) 313 { 314 struct xe_device *xe = gt_to_xe(gt); 315 struct drm_minor *minor = gt_to_xe(gt)->drm.primary; 316 struct dentry *parent = gt->tile->debugfs; 317 struct dentry *root; 318 char symlink[16]; 319 char name[8]; 320 321 xe_gt_assert(gt, minor->debugfs_root); 322 323 if (IS_ERR(parent)) 324 return; 325 326 snprintf(name, sizeof(name), "gt%d", gt->info.id); 327 root = debugfs_create_dir(name, parent); 328 if (IS_ERR(root)) { 329 drm_warn(&xe->drm, "Create GT directory failed"); 330 return; 331 } 332 333 /* 334 * Store the xe_gt pointer as private data of the gt/ directory node 335 * so other GT specific attributes under that directory may refer to 336 * it by looking at its parent node private data. 337 */ 338 root->d_inode->i_private = gt; 339 340 /* VF safe */ 341 debugfs_create_file("stats", 0600, root, gt, &stats_fops); 342 debugfs_create_file("force_reset", 0600, root, gt, &force_reset_fops); 343 debugfs_create_file("force_reset_sync", 0600, root, gt, &force_reset_sync_fops); 344 345 drm_debugfs_create_files(vf_safe_debugfs_list, 346 ARRAY_SIZE(vf_safe_debugfs_list), 347 root, minor); 348 349 if (!IS_SRIOV_VF(xe)) 350 drm_debugfs_create_files(pf_only_debugfs_list, 351 ARRAY_SIZE(pf_only_debugfs_list), 352 root, minor); 353 354 xe_uc_debugfs_register(>->uc, root); 355 356 if (IS_SRIOV_PF(xe)) 357 xe_gt_sriov_pf_debugfs_register(gt, root); 358 else if (IS_SRIOV_VF(xe)) 359 xe_gt_sriov_vf_debugfs_register(gt, root); 360 361 /* 362 * Backwards compatibility only: create a link for the legacy clients 363 * who may expect gt/ directory at the root level, not the tile level. 364 */ 365 snprintf(symlink, sizeof(symlink), "tile%u/%s", gt->tile->id, name); 366 debugfs_create_symlink(name, minor->debugfs_root, symlink); 367 } 368