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 "pxp/intel_pxp_debugfs.h" 16 #include "uc/intel_uc_debugfs.h" 17 18 int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val) 19 { 20 int ret = intel_gt_terminally_wedged(gt); 21 22 switch (ret) { 23 case -EIO: 24 *val = 1; 25 return 0; 26 case 0: 27 *val = 0; 28 return 0; 29 default: 30 return ret; 31 } 32 } 33 34 void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val) 35 { 36 /* Flush any previous reset before applying for a new one */ 37 wait_event(gt->reset.queue, 38 !test_bit(I915_RESET_BACKOFF, >->reset.flags)); 39 40 intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE, 41 "Manually reset engine mask to %llx", val); 42 } 43 44 /* 45 * keep the interface clean where the first parameter 46 * is a 'struct intel_gt *' instead of 'void *' 47 */ 48 static int __intel_gt_debugfs_reset_show(void *data, u64 *val) 49 { 50 return intel_gt_debugfs_reset_show(data, val); 51 } 52 53 #ifdef notyet 54 55 static int __intel_gt_debugfs_reset_store(void *data, u64 val) 56 { 57 intel_gt_debugfs_reset_store(data, val); 58 59 return 0; 60 } 61 62 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show, 63 __intel_gt_debugfs_reset_store, "%llu\n"); 64 65 static int steering_show(struct seq_file *m, void *data) 66 { 67 struct drm_printer p = drm_seq_file_printer(m); 68 struct intel_gt *gt = m->private; 69 70 intel_gt_mcr_report_steering(&p, gt, true); 71 72 return 0; 73 } 74 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering); 75 76 static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root) 77 { 78 static const struct intel_gt_debugfs_file files[] = { 79 { "reset", &reset_fops, NULL }, 80 { "steering", &steering_fops }, 81 }; 82 83 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt); 84 } 85 86 #endif /* notyet */ 87 88 void intel_gt_debugfs_register(struct intel_gt *gt) 89 { 90 #ifdef notyet 91 struct dentry *root; 92 93 if (!gt->i915->drm.primary->debugfs_root) 94 return; 95 96 root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root); 97 if (IS_ERR(root)) 98 return; 99 100 gt_debugfs_register(gt, root); 101 102 intel_gt_engines_debugfs_register(gt, root); 103 intel_gt_pm_debugfs_register(gt, root); 104 intel_sseu_debugfs_register(gt, root); 105 106 intel_uc_debugfs_register(>->uc, root); 107 intel_pxp_debugfs_register(>->pxp, root); 108 #endif 109 } 110 111 void intel_gt_debugfs_register_files(struct dentry *root, 112 const struct intel_gt_debugfs_file *files, 113 unsigned long count, void *data) 114 { 115 #ifdef notyet 116 while (count--) { 117 umode_t mode = files->fops->write ? 0644 : 0444; 118 119 if (!files->eval || files->eval(data)) 120 debugfs_create_file(files->name, 121 mode, root, data, 122 files->fops); 123 124 files++; 125 } 126 #endif 127 } 128