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_sriov.h" 22 #include "xe_step.h" 23 24 #ifdef CONFIG_DRM_XE_DEBUG 25 #include "xe_bo_evict.h" 26 #include "xe_migrate.h" 27 #include "xe_vm.h" 28 #endif 29 30 DECLARE_FAULT_ATTR(gt_reset_failure); 31 32 static struct xe_device *node_to_xe(struct drm_info_node *node) 33 { 34 return to_xe_device(node->minor->dev); 35 } 36 37 static int info(struct seq_file *m, void *data) 38 { 39 struct xe_device *xe = node_to_xe(m->private); 40 struct drm_printer p = drm_seq_file_printer(m); 41 struct xe_gt *gt; 42 u8 id; 43 44 xe_pm_runtime_get(xe); 45 46 drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100); 47 drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100); 48 drm_printf(&p, "stepping G:%s M:%s D:%s B:%s\n", 49 xe_step_name(xe->info.step.graphics), 50 xe_step_name(xe->info.step.media), 51 xe_step_name(xe->info.step.display), 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; 95 96 xe_pm_runtime_get(xe); 97 for_each_gt(gt, xe, id) 98 XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 99 100 return 0; 101 } 102 103 static int forcewake_release(struct inode *inode, struct file *file) 104 { 105 struct xe_device *xe = inode->i_private; 106 struct xe_gt *gt; 107 u8 id; 108 109 for_each_gt(gt, xe, id) 110 XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 111 xe_pm_runtime_put(xe); 112 113 return 0; 114 } 115 116 static const struct file_operations forcewake_all_fops = { 117 .owner = THIS_MODULE, 118 .open = forcewake_open, 119 .release = forcewake_release, 120 }; 121 122 static ssize_t wedged_mode_show(struct file *f, char __user *ubuf, 123 size_t size, loff_t *pos) 124 { 125 struct xe_device *xe = file_inode(f)->i_private; 126 char buf[32]; 127 int len = 0; 128 129 len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode); 130 131 return simple_read_from_buffer(ubuf, size, pos, buf, len); 132 } 133 134 static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf, 135 size_t size, loff_t *pos) 136 { 137 struct xe_device *xe = file_inode(f)->i_private; 138 struct xe_gt *gt; 139 u32 wedged_mode; 140 ssize_t ret; 141 u8 id; 142 143 ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode); 144 if (ret) 145 return ret; 146 147 if (wedged_mode > 2) 148 return -EINVAL; 149 150 if (xe->wedged.mode == wedged_mode) 151 return 0; 152 153 xe->wedged.mode = wedged_mode; 154 155 xe_pm_runtime_get(xe); 156 for_each_gt(gt, xe, id) { 157 ret = xe_guc_ads_scheduler_policy_toggle_reset(>->uc.guc.ads); 158 if (ret) { 159 xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n"); 160 return -EIO; 161 } 162 } 163 xe_pm_runtime_put(xe); 164 165 return size; 166 } 167 168 static const struct file_operations wedged_mode_fops = { 169 .owner = THIS_MODULE, 170 .read = wedged_mode_show, 171 .write = wedged_mode_set, 172 }; 173 174 void xe_debugfs_register(struct xe_device *xe) 175 { 176 struct ttm_device *bdev = &xe->ttm; 177 struct drm_minor *minor = xe->drm.primary; 178 struct dentry *root = minor->debugfs_root; 179 struct ttm_resource_manager *man; 180 struct xe_gt *gt; 181 u32 mem_type; 182 u8 id; 183 184 drm_debugfs_create_files(debugfs_list, 185 ARRAY_SIZE(debugfs_list), 186 root, minor); 187 188 debugfs_create_file("forcewake_all", 0400, root, xe, 189 &forcewake_all_fops); 190 191 debugfs_create_file("wedged_mode", 0400, root, xe, 192 &wedged_mode_fops); 193 194 for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { 195 man = ttm_manager_type(bdev, mem_type); 196 197 if (man) { 198 char name[16]; 199 200 snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0); 201 ttm_resource_manager_create_debugfs(man, root, name); 202 } 203 } 204 205 man = ttm_manager_type(bdev, XE_PL_TT); 206 ttm_resource_manager_create_debugfs(man, root, "gtt_mm"); 207 208 man = ttm_manager_type(bdev, XE_PL_STOLEN); 209 if (man) 210 ttm_resource_manager_create_debugfs(man, root, "stolen_mm"); 211 212 for_each_gt(gt, xe, id) 213 xe_gt_debugfs_register(gt); 214 215 fault_create_debugfs_attr("fail_gt_reset", root, >_reset_failure); 216 } 217