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 D:%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.display), 54 xe_step_name(xe->info.step.basedie)); 55 drm_printf(&p, "is_dgfx %s\n", str_yes_no(xe->info.is_dgfx)); 56 drm_printf(&p, "platform %d\n", xe->info.platform); 57 drm_printf(&p, "subplatform %d\n", 58 xe->info.subplatform > XE_SUBPLATFORM_NONE ? xe->info.subplatform : 0); 59 drm_printf(&p, "devid 0x%x\n", xe->info.devid); 60 drm_printf(&p, "revid %d\n", xe->info.revid); 61 drm_printf(&p, "tile_count %d\n", xe->info.tile_count); 62 drm_printf(&p, "vm_max_level %d\n", xe->info.vm_max_level); 63 drm_printf(&p, "force_execlist %s\n", str_yes_no(xe->info.force_execlist)); 64 drm_printf(&p, "has_flat_ccs %s\n", str_yes_no(xe->info.has_flat_ccs)); 65 drm_printf(&p, "has_usm %s\n", str_yes_no(xe->info.has_usm)); 66 drm_printf(&p, "skip_guc_pc %s\n", str_yes_no(xe->info.skip_guc_pc)); 67 for_each_gt(gt, xe, id) { 68 drm_printf(&p, "gt%d force wake %d\n", id, 69 xe_force_wake_ref(gt_to_fw(gt), XE_FW_GT)); 70 drm_printf(&p, "gt%d engine_mask 0x%llx\n", id, 71 gt->info.engine_mask); 72 } 73 74 xe_pm_runtime_put(xe); 75 return 0; 76 } 77 78 static int sriov_info(struct seq_file *m, void *data) 79 { 80 struct xe_device *xe = node_to_xe(m->private); 81 struct drm_printer p = drm_seq_file_printer(m); 82 83 xe_sriov_print_info(xe, &p); 84 return 0; 85 } 86 87 static const struct drm_info_list debugfs_list[] = { 88 {"info", info, 0}, 89 { .name = "sriov_info", .show = sriov_info, }, 90 }; 91 92 static int forcewake_open(struct inode *inode, struct file *file) 93 { 94 struct xe_device *xe = inode->i_private; 95 struct xe_gt *gt; 96 u8 id; 97 98 xe_pm_runtime_get(xe); 99 for_each_gt(gt, xe, id) 100 XE_WARN_ON(xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 101 102 return 0; 103 } 104 105 static int forcewake_release(struct inode *inode, struct file *file) 106 { 107 struct xe_device *xe = inode->i_private; 108 struct xe_gt *gt; 109 u8 id; 110 111 for_each_gt(gt, xe, id) 112 XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL)); 113 xe_pm_runtime_put(xe); 114 115 return 0; 116 } 117 118 static const struct file_operations forcewake_all_fops = { 119 .owner = THIS_MODULE, 120 .open = forcewake_open, 121 .release = forcewake_release, 122 }; 123 124 static ssize_t wedged_mode_show(struct file *f, char __user *ubuf, 125 size_t size, loff_t *pos) 126 { 127 struct xe_device *xe = file_inode(f)->i_private; 128 char buf[32]; 129 int len = 0; 130 131 len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode); 132 133 return simple_read_from_buffer(ubuf, size, pos, buf, len); 134 } 135 136 static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf, 137 size_t size, loff_t *pos) 138 { 139 struct xe_device *xe = file_inode(f)->i_private; 140 struct xe_gt *gt; 141 u32 wedged_mode; 142 ssize_t ret; 143 u8 id; 144 145 ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode); 146 if (ret) 147 return ret; 148 149 if (wedged_mode > 2) 150 return -EINVAL; 151 152 if (xe->wedged.mode == wedged_mode) 153 return 0; 154 155 xe->wedged.mode = wedged_mode; 156 157 xe_pm_runtime_get(xe); 158 for_each_gt(gt, xe, id) { 159 ret = xe_guc_ads_scheduler_policy_toggle_reset(>->uc.guc.ads); 160 if (ret) { 161 xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n"); 162 return -EIO; 163 } 164 } 165 xe_pm_runtime_put(xe); 166 167 return size; 168 } 169 170 static const struct file_operations wedged_mode_fops = { 171 .owner = THIS_MODULE, 172 .read = wedged_mode_show, 173 .write = wedged_mode_set, 174 }; 175 176 void xe_debugfs_register(struct xe_device *xe) 177 { 178 struct ttm_device *bdev = &xe->ttm; 179 struct drm_minor *minor = xe->drm.primary; 180 struct dentry *root = minor->debugfs_root; 181 struct ttm_resource_manager *man; 182 struct xe_gt *gt; 183 u32 mem_type; 184 u8 id; 185 186 drm_debugfs_create_files(debugfs_list, 187 ARRAY_SIZE(debugfs_list), 188 root, minor); 189 190 debugfs_create_file("forcewake_all", 0400, root, xe, 191 &forcewake_all_fops); 192 193 debugfs_create_file("wedged_mode", 0400, root, xe, 194 &wedged_mode_fops); 195 196 for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { 197 man = ttm_manager_type(bdev, mem_type); 198 199 if (man) { 200 char name[16]; 201 202 snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0); 203 ttm_resource_manager_create_debugfs(man, root, name); 204 } 205 } 206 207 man = ttm_manager_type(bdev, XE_PL_TT); 208 ttm_resource_manager_create_debugfs(man, root, "gtt_mm"); 209 210 man = ttm_manager_type(bdev, XE_PL_STOLEN); 211 if (man) 212 ttm_resource_manager_create_debugfs(man, root, "stolen_mm"); 213 214 for_each_gt(gt, xe, id) 215 xe_gt_debugfs_register(gt); 216 217 #ifdef CONFIG_FAULT_INJECTION 218 fault_create_debugfs_attr("fail_gt_reset", root, >_reset_failure); 219 #endif 220 221 } 222