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/string_helpers.h> 10 11 #include <drm/drm_debugfs.h> 12 13 #include "xe_bo.h" 14 #include "xe_device.h" 15 #include "xe_force_wake.h" 16 #include "xe_gt_debugfs.h" 17 #include "xe_gt_printk.h" 18 #include "xe_guc_ads.h" 19 #include "xe_pm.h" 20 #include "xe_sriov.h" 21 #include "xe_step.h" 22 23 #ifdef CONFIG_DRM_XE_DEBUG 24 #include "xe_bo_evict.h" 25 #include "xe_migrate.h" 26 #include "xe_vm.h" 27 #endif 28 29 #ifdef CONFIG_FAULT_INJECTION 30 #include <linux/fault-inject.h> /* XXX: fault-inject.h is broken */ 31 DECLARE_FAULT_ATTR(gt_reset_failure); 32 #endif 33 34 static struct xe_device *node_to_xe(struct drm_info_node *node) 35 { 36 return to_xe_device(node->minor->dev); 37 } 38 39 static int info(struct seq_file *m, void *data) 40 { 41 struct xe_device *xe = node_to_xe(m->private); 42 struct drm_printer p = drm_seq_file_printer(m); 43 struct xe_gt *gt; 44 u8 id; 45 46 xe_pm_runtime_get(xe); 47 48 drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100); 49 drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100); 50 drm_printf(&p, "stepping G:%s M:%s B:%s\n", 51 xe_step_name(xe->info.step.graphics), 52 xe_step_name(xe->info.step.media), 53 xe_step_name(xe->info.step.basedie)); 54 drm_printf(&p, "is_dgfx %s\n", str_yes_no(xe->info.is_dgfx)); 55 drm_printf(&p, "platform %d\n", xe->info.platform); 56 drm_printf(&p, "subplatform %d\n", 57 xe->info.subplatform > XE_SUBPLATFORM_NONE ? xe->info.subplatform : 0); 58 drm_printf(&p, "devid 0x%x\n", xe->info.devid); 59 drm_printf(&p, "revid %d\n", xe->info.revid); 60 drm_printf(&p, "tile_count %d\n", xe->info.tile_count); 61 drm_printf(&p, "vm_max_level %d\n", xe->info.vm_max_level); 62 drm_printf(&p, "force_execlist %s\n", str_yes_no(xe->info.force_execlist)); 63 drm_printf(&p, "has_flat_ccs %s\n", str_yes_no(xe->info.has_flat_ccs)); 64 drm_printf(&p, "has_usm %s\n", str_yes_no(xe->info.has_usm)); 65 drm_printf(&p, "skip_guc_pc %s\n", str_yes_no(xe->info.skip_guc_pc)); 66 for_each_gt(gt, xe, id) { 67 drm_printf(&p, "gt%d force wake %d\n", id, 68 xe_force_wake_ref(gt_to_fw(gt), XE_FW_GT)); 69 drm_printf(&p, "gt%d engine_mask 0x%llx\n", id, 70 gt->info.engine_mask); 71 } 72 73 xe_pm_runtime_put(xe); 74 return 0; 75 } 76 77 static int sriov_info(struct seq_file *m, void *data) 78 { 79 struct xe_device *xe = node_to_xe(m->private); 80 struct drm_printer p = drm_seq_file_printer(m); 81 82 xe_sriov_print_info(xe, &p); 83 return 0; 84 } 85 86 static const struct drm_info_list debugfs_list[] = { 87 {"info", info, 0}, 88 { .name = "sriov_info", .show = sriov_info, }, 89 }; 90 91 static int forcewake_open(struct inode *inode, struct file *file) 92 { 93 struct xe_device *xe = inode->i_private; 94 struct xe_gt *gt; 95 u8 id; 96 97 xe_pm_runtime_get(xe); 98 for_each_gt(gt, xe, id) 99 XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 100 101 return 0; 102 } 103 104 static int forcewake_release(struct inode *inode, struct file *file) 105 { 106 struct xe_device *xe = inode->i_private; 107 struct xe_gt *gt; 108 u8 id; 109 110 for_each_gt(gt, xe, id) 111 XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 112 xe_pm_runtime_put(xe); 113 114 return 0; 115 } 116 117 static const struct file_operations forcewake_all_fops = { 118 .owner = THIS_MODULE, 119 .open = forcewake_open, 120 .release = forcewake_release, 121 }; 122 123 static ssize_t wedged_mode_show(struct file *f, char __user *ubuf, 124 size_t size, loff_t *pos) 125 { 126 struct xe_device *xe = file_inode(f)->i_private; 127 char buf[32]; 128 int len = 0; 129 130 len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode); 131 132 return simple_read_from_buffer(ubuf, size, pos, buf, len); 133 } 134 135 static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf, 136 size_t size, loff_t *pos) 137 { 138 struct xe_device *xe = file_inode(f)->i_private; 139 struct xe_gt *gt; 140 u32 wedged_mode; 141 ssize_t ret; 142 u8 id; 143 144 ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode); 145 if (ret) 146 return ret; 147 148 if (wedged_mode > 2) 149 return -EINVAL; 150 151 if (xe->wedged.mode == wedged_mode) 152 return 0; 153 154 xe->wedged.mode = wedged_mode; 155 156 xe_pm_runtime_get(xe); 157 for_each_gt(gt, xe, id) { 158 ret = xe_guc_ads_scheduler_policy_toggle_reset(>->uc.guc.ads); 159 if (ret) { 160 xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n"); 161 return -EIO; 162 } 163 } 164 xe_pm_runtime_put(xe); 165 166 return size; 167 } 168 169 static const struct file_operations wedged_mode_fops = { 170 .owner = THIS_MODULE, 171 .read = wedged_mode_show, 172 .write = wedged_mode_set, 173 }; 174 175 void xe_debugfs_register(struct xe_device *xe) 176 { 177 struct ttm_device *bdev = &xe->ttm; 178 struct drm_minor *minor = xe->drm.primary; 179 struct dentry *root = minor->debugfs_root; 180 struct ttm_resource_manager *man; 181 struct xe_gt *gt; 182 u32 mem_type; 183 u8 id; 184 185 drm_debugfs_create_files(debugfs_list, 186 ARRAY_SIZE(debugfs_list), 187 root, minor); 188 189 debugfs_create_file("forcewake_all", 0400, root, xe, 190 &forcewake_all_fops); 191 192 debugfs_create_file("wedged_mode", 0400, root, xe, 193 &wedged_mode_fops); 194 195 for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { 196 man = ttm_manager_type(bdev, mem_type); 197 198 if (man) { 199 char name[16]; 200 201 snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0); 202 ttm_resource_manager_create_debugfs(man, root, name); 203 } 204 } 205 206 man = ttm_manager_type(bdev, XE_PL_TT); 207 ttm_resource_manager_create_debugfs(man, root, "gtt_mm"); 208 209 man = ttm_manager_type(bdev, XE_PL_STOLEN); 210 if (man) 211 ttm_resource_manager_create_debugfs(man, root, "stolen_mm"); 212 213 for_each_gt(gt, xe, id) 214 xe_gt_debugfs_register(gt); 215 216 #ifdef CONFIG_FAULT_INJECTION 217 fault_create_debugfs_attr("fail_gt_reset", root, >_reset_failure); 218 #endif 219 220 } 221