1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2019 Intel Corporation 4 */ 5 6 #include <linux/debugfs.h> 7 8 #include <drm/drm_print.h> 9 10 #include "i915_drv.h" 11 #include "intel_gt.h" 12 #include "intel_gt_debugfs.h" 13 #include "intel_gt_engines_debugfs.h" 14 #include "intel_gt_mcr.h" 15 #include "intel_gt_pm_debugfs.h" 16 #include "intel_sseu_debugfs.h" 17 #include "uc/intel_uc_debugfs.h" 18 19 int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val) 20 { 21 int ret = intel_gt_terminally_wedged(gt); 22 23 switch (ret) { 24 case -EIO: 25 *val = 1; 26 return 0; 27 case 0: 28 *val = 0; 29 return 0; 30 default: 31 return ret; 32 } 33 } 34 35 void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val) 36 { 37 /* Flush any previous reset before applying for a new one */ 38 wait_event(gt->reset.queue, 39 !test_bit(I915_RESET_BACKOFF, >->reset.flags)); 40 41 intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE, 42 "Manually reset engine mask to %llx", val); 43 } 44 45 /* 46 * keep the interface clean where the first parameter 47 * is a 'struct intel_gt *' instead of 'void *' 48 */ 49 static int __intel_gt_debugfs_reset_show(void *data, u64 *val) 50 { 51 return intel_gt_debugfs_reset_show(data, val); 52 } 53 54 static int __intel_gt_debugfs_reset_store(void *data, u64 val) 55 { 56 intel_gt_debugfs_reset_store(data, val); 57 58 return 0; 59 } 60 61 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show, 62 __intel_gt_debugfs_reset_store, "%llu\n"); 63 64 static int steering_show(struct seq_file *m, void *data) 65 { 66 struct drm_printer p = drm_seq_file_printer(m); 67 struct intel_gt *gt = m->private; 68 69 intel_gt_mcr_report_steering(&p, gt, true); 70 71 return 0; 72 } 73 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering); 74 75 static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root) 76 { 77 static const struct intel_gt_debugfs_file files[] = { 78 { "reset", &reset_fops, NULL }, 79 { "steering", &steering_fops }, 80 }; 81 82 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt); 83 } 84 85 void intel_gt_debugfs_register(struct intel_gt *gt) 86 { 87 struct dentry *debugfs_root = gt->i915->drm.debugfs_root; 88 struct dentry *root; 89 char gtname[4]; 90 91 if (!debugfs_root) 92 return; 93 94 snprintf(gtname, sizeof(gtname), "gt%u", gt->info.id); 95 root = debugfs_create_dir(gtname, debugfs_root); 96 if (IS_ERR(root)) 97 return; 98 99 gt_debugfs_register(gt, root); 100 101 intel_gt_engines_debugfs_register(gt, root); 102 intel_gt_pm_debugfs_register(gt, root); 103 intel_sseu_debugfs_register(gt, root); 104 105 intel_uc_debugfs_register(>->uc, root); 106 } 107 108 void intel_gt_debugfs_register_files(struct dentry *root, 109 const struct intel_gt_debugfs_file *files, 110 unsigned long count, void *data) 111 { 112 while (count--) { 113 umode_t mode = files->fops->write ? 0644 : 0444; 114 115 if (!files->eval || files->eval(data)) 116 debugfs_create_file(files->name, 117 mode, root, data, 118 files->fops); 119 120 files++; 121 } 122 } 123