1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2019 Intel Corporation 4 */ 5 6 #include <linux/debugfs.h> 7 8 #include "i915_drv.h" 9 #include "intel_gt.h" 10 #include "intel_gt_debugfs.h" 11 #include "intel_gt_engines_debugfs.h" 12 #include "intel_gt_mcr.h" 13 #include "intel_gt_pm_debugfs.h" 14 #include "intel_sseu_debugfs.h" 15 #include "uc/intel_uc_debugfs.h" 16 17 int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val) 18 { 19 int ret = intel_gt_terminally_wedged(gt); 20 21 switch (ret) { 22 case -EIO: 23 *val = 1; 24 return 0; 25 case 0: 26 *val = 0; 27 return 0; 28 default: 29 return ret; 30 } 31 } 32 33 void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val) 34 { 35 /* Flush any previous reset before applying for a new one */ 36 wait_event(gt->reset.queue, 37 !test_bit(I915_RESET_BACKOFF, >->reset.flags)); 38 39 intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE, 40 "Manually reset engine mask to %llx", val); 41 } 42 43 /* 44 * keep the interface clean where the first parameter 45 * is a 'struct intel_gt *' instead of 'void *' 46 */ 47 static int __intel_gt_debugfs_reset_show(void *data, u64 *val) 48 { 49 return intel_gt_debugfs_reset_show(data, val); 50 } 51 52 static int __intel_gt_debugfs_reset_store(void *data, u64 val) 53 { 54 intel_gt_debugfs_reset_store(data, val); 55 56 return 0; 57 } 58 59 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show, 60 __intel_gt_debugfs_reset_store, "%llu\n"); 61 62 static int steering_show(struct seq_file *m, void *data) 63 { 64 struct drm_printer p = drm_seq_file_printer(m); 65 struct intel_gt *gt = m->private; 66 67 intel_gt_mcr_report_steering(&p, gt, true); 68 69 return 0; 70 } 71 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering); 72 73 static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root) 74 { 75 static const struct intel_gt_debugfs_file files[] = { 76 { "reset", &reset_fops, NULL }, 77 { "steering", &steering_fops }, 78 }; 79 80 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt); 81 } 82 83 void intel_gt_debugfs_register(struct intel_gt *gt) 84 { 85 struct dentry *root; 86 char gtname[4]; 87 88 if (!gt->i915->drm.primary->debugfs_root) 89 return; 90 91 snprintf(gtname, sizeof(gtname), "gt%u", gt->info.id); 92 root = debugfs_create_dir(gtname, gt->i915->drm.primary->debugfs_root); 93 if (IS_ERR(root)) 94 return; 95 96 gt_debugfs_register(gt, root); 97 98 intel_gt_engines_debugfs_register(gt, root); 99 intel_gt_pm_debugfs_register(gt, root); 100 intel_sseu_debugfs_register(gt, root); 101 102 intel_uc_debugfs_register(>->uc, root); 103 } 104 105 void intel_gt_debugfs_register_files(struct dentry *root, 106 const struct intel_gt_debugfs_file *files, 107 unsigned long count, void *data) 108 { 109 while (count--) { 110 umode_t mode = files->fops->write ? 0644 : 0444; 111 112 if (!files->eval || files->eval(data)) 113 debugfs_create_file(files->name, 114 mode, root, data, 115 files->fops); 116 117 files++; 118 } 119 } 120