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 "xe_bo.h" 15 #include "xe_device.h" 16 #include "xe_force_wake.h" 17 #include "xe_gt_debugfs.h" 18 #include "xe_gt_printk.h" 19 #include "xe_guc_ads.h" 20 #include "xe_pm.h" 21 #include "xe_pxp_debugfs.h" 22 #include "xe_sriov.h" 23 #include "xe_step.h" 24 25 #ifdef CONFIG_DRM_XE_DEBUG 26 #include "xe_bo_evict.h" 27 #include "xe_migrate.h" 28 #include "xe_vm.h" 29 #endif 30 31 DECLARE_FAULT_ATTR(gt_reset_failure); 32 33 static struct xe_device *node_to_xe(struct drm_info_node *node) 34 { 35 return to_xe_device(node->minor->dev); 36 } 37 38 static int info(struct seq_file *m, void *data) 39 { 40 struct xe_device *xe = node_to_xe(m->private); 41 struct drm_printer p = drm_seq_file_printer(m); 42 struct xe_gt *gt; 43 u8 id; 44 45 xe_pm_runtime_get(xe); 46 47 drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100); 48 drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100); 49 drm_printf(&p, "stepping G:%s M:%s B:%s\n", 50 xe_step_name(xe->info.step.graphics), 51 xe_step_name(xe->info.step.media), 52 xe_step_name(xe->info.step.basedie)); 53 drm_printf(&p, "is_dgfx %s\n", str_yes_no(xe->info.is_dgfx)); 54 drm_printf(&p, "platform %d\n", xe->info.platform); 55 drm_printf(&p, "subplatform %d\n", 56 xe->info.subplatform > XE_SUBPLATFORM_NONE ? xe->info.subplatform : 0); 57 drm_printf(&p, "devid 0x%x\n", xe->info.devid); 58 drm_printf(&p, "revid %d\n", xe->info.revid); 59 drm_printf(&p, "tile_count %d\n", xe->info.tile_count); 60 drm_printf(&p, "vm_max_level %d\n", xe->info.vm_max_level); 61 drm_printf(&p, "force_execlist %s\n", str_yes_no(xe->info.force_execlist)); 62 drm_printf(&p, "has_flat_ccs %s\n", str_yes_no(xe->info.has_flat_ccs)); 63 drm_printf(&p, "has_usm %s\n", str_yes_no(xe->info.has_usm)); 64 drm_printf(&p, "skip_guc_pc %s\n", str_yes_no(xe->info.skip_guc_pc)); 65 for_each_gt(gt, xe, id) { 66 drm_printf(&p, "gt%d force wake %d\n", id, 67 xe_force_wake_ref(gt_to_fw(gt), XE_FW_GT)); 68 drm_printf(&p, "gt%d engine_mask 0x%llx\n", id, 69 gt->info.engine_mask); 70 } 71 72 xe_pm_runtime_put(xe); 73 return 0; 74 } 75 76 static int sriov_info(struct seq_file *m, void *data) 77 { 78 struct xe_device *xe = node_to_xe(m->private); 79 struct drm_printer p = drm_seq_file_printer(m); 80 81 xe_sriov_print_info(xe, &p); 82 return 0; 83 } 84 85 static const struct drm_info_list debugfs_list[] = { 86 {"info", info, 0}, 87 { .name = "sriov_info", .show = sriov_info, }, 88 }; 89 90 static int forcewake_open(struct inode *inode, struct file *file) 91 { 92 struct xe_device *xe = inode->i_private; 93 struct xe_gt *gt; 94 u8 id, last_gt; 95 unsigned int fw_ref; 96 97 xe_pm_runtime_get(xe); 98 for_each_gt(gt, xe, id) { 99 last_gt = id; 100 101 fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL); 102 if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) 103 goto err_fw_get; 104 } 105 106 return 0; 107 108 err_fw_get: 109 for_each_gt(gt, xe, id) { 110 if (id < last_gt) 111 xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL); 112 else if (id == last_gt) 113 xe_force_wake_put(gt_to_fw(gt), fw_ref); 114 else 115 break; 116 } 117 118 xe_pm_runtime_put(xe); 119 return -ETIMEDOUT; 120 } 121 122 static int forcewake_release(struct inode *inode, struct file *file) 123 { 124 struct xe_device *xe = inode->i_private; 125 struct xe_gt *gt; 126 u8 id; 127 128 for_each_gt(gt, xe, id) 129 xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL); 130 xe_pm_runtime_put(xe); 131 132 return 0; 133 } 134 135 static const struct file_operations forcewake_all_fops = { 136 .owner = THIS_MODULE, 137 .open = forcewake_open, 138 .release = forcewake_release, 139 }; 140 141 static ssize_t wedged_mode_show(struct file *f, char __user *ubuf, 142 size_t size, loff_t *pos) 143 { 144 struct xe_device *xe = file_inode(f)->i_private; 145 char buf[32]; 146 int len = 0; 147 148 len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode); 149 150 return simple_read_from_buffer(ubuf, size, pos, buf, len); 151 } 152 153 static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf, 154 size_t size, loff_t *pos) 155 { 156 struct xe_device *xe = file_inode(f)->i_private; 157 struct xe_gt *gt; 158 u32 wedged_mode; 159 ssize_t ret; 160 u8 id; 161 162 ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode); 163 if (ret) 164 return ret; 165 166 if (wedged_mode > 2) 167 return -EINVAL; 168 169 if (xe->wedged.mode == wedged_mode) 170 return size; 171 172 xe->wedged.mode = wedged_mode; 173 174 xe_pm_runtime_get(xe); 175 for_each_gt(gt, xe, id) { 176 ret = xe_guc_ads_scheduler_policy_toggle_reset(>->uc.guc.ads); 177 if (ret) { 178 xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n"); 179 xe_pm_runtime_put(xe); 180 return -EIO; 181 } 182 } 183 xe_pm_runtime_put(xe); 184 185 return size; 186 } 187 188 static const struct file_operations wedged_mode_fops = { 189 .owner = THIS_MODULE, 190 .read = wedged_mode_show, 191 .write = wedged_mode_set, 192 }; 193 194 void xe_debugfs_register(struct xe_device *xe) 195 { 196 struct ttm_device *bdev = &xe->ttm; 197 struct drm_minor *minor = xe->drm.primary; 198 struct dentry *root = minor->debugfs_root; 199 struct ttm_resource_manager *man; 200 struct xe_gt *gt; 201 u32 mem_type; 202 u8 id; 203 204 drm_debugfs_create_files(debugfs_list, 205 ARRAY_SIZE(debugfs_list), 206 root, minor); 207 208 debugfs_create_file("forcewake_all", 0400, root, xe, 209 &forcewake_all_fops); 210 211 debugfs_create_file("wedged_mode", 0600, root, xe, 212 &wedged_mode_fops); 213 214 for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { 215 man = ttm_manager_type(bdev, mem_type); 216 217 if (man) { 218 char name[16]; 219 220 snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0); 221 ttm_resource_manager_create_debugfs(man, root, name); 222 } 223 } 224 225 man = ttm_manager_type(bdev, XE_PL_TT); 226 ttm_resource_manager_create_debugfs(man, root, "gtt_mm"); 227 228 man = ttm_manager_type(bdev, XE_PL_STOLEN); 229 if (man) 230 ttm_resource_manager_create_debugfs(man, root, "stolen_mm"); 231 232 for_each_gt(gt, xe, id) 233 xe_gt_debugfs_register(gt); 234 235 xe_pxp_debugfs_register(xe->pxp); 236 237 fault_create_debugfs_attr("fail_gt_reset", root, >_reset_failure); 238 } 239