1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include "xe_guc_debugfs.h" 7 8 #include <drm/drm_debugfs.h> 9 #include <drm/drm_managed.h> 10 11 #include "xe_device.h" 12 #include "xe_gt.h" 13 #include "xe_guc.h" 14 #include "xe_guc_ct.h" 15 #include "xe_guc_log.h" 16 #include "xe_guc_pc.h" 17 #include "xe_macros.h" 18 #include "xe_pm.h" 19 20 /* 21 * guc_debugfs_show - A show callback for struct drm_info_list 22 * @m: the &seq_file 23 * @data: data used by the drm debugfs helpers 24 * 25 * This callback can be used in struct drm_info_list to describe debugfs 26 * files that are &xe_guc specific in similar way how we handle &xe_gt 27 * specific files using &xe_gt_debugfs_simple_show. 28 * 29 * It is assumed that those debugfs files will be created on directory entry 30 * which grandparent struct dentry d_inode->i_private points to &xe_gt. 31 * 32 * /sys/kernel/debug/dri/0/ 33 * ├── gt0 # dent->d_parent->d_parent (d_inode->i_private == gt) 34 * │ ├── uc # dent->d_parent 35 * │ │ ├── guc_info # dent 36 * │ │ ├── guc_... 37 * 38 * This function assumes that &m->private will be set to the &struct 39 * drm_info_node corresponding to the instance of the info on a given &struct 40 * drm_minor (see struct drm_info_list.show for details). 41 * 42 * This function also assumes that struct drm_info_list.data will point to the 43 * function code that will actually print a file content:: 44 * 45 * int (*print)(struct xe_guc *, struct drm_printer *) 46 * 47 * Example:: 48 * 49 * int foo(struct xe_guc *guc, struct drm_printer *p) 50 * { 51 * drm_printf(p, "enabled %d\n", guc->submission_state.enabled); 52 * return 0; 53 * } 54 * 55 * static const struct drm_info_list bar[] = { 56 * { name = "foo", .show = guc_debugfs_show, .data = foo }, 57 * }; 58 * 59 * parent = debugfs_create_dir("uc", gtdir); 60 * drm_debugfs_create_files(bar, ARRAY_SIZE(bar), parent, minor); 61 * 62 * Return: 0 on success or a negative error code on failure. 63 */ 64 static int guc_debugfs_show(struct seq_file *m, void *data) 65 { 66 struct drm_printer p = drm_seq_file_printer(m); 67 struct drm_info_node *node = m->private; 68 struct dentry *parent = node->dent->d_parent; 69 struct dentry *grandparent = parent->d_parent; 70 struct xe_gt *gt = grandparent->d_inode->i_private; 71 struct xe_device *xe = gt_to_xe(gt); 72 int (*print)(struct xe_guc *, struct drm_printer *) = node->info_ent->data; 73 int ret; 74 75 xe_pm_runtime_get(xe); 76 ret = print(>->uc.guc, &p); 77 xe_pm_runtime_put(xe); 78 79 return ret; 80 } 81 82 static int guc_log(struct xe_guc *guc, struct drm_printer *p) 83 { 84 xe_guc_log_print(&guc->log, p); 85 return 0; 86 } 87 88 static int guc_log_dmesg(struct xe_guc *guc, struct drm_printer *p) 89 { 90 xe_guc_log_print_dmesg(&guc->log); 91 return 0; 92 } 93 94 static int guc_ctb(struct xe_guc *guc, struct drm_printer *p) 95 { 96 xe_guc_ct_print(&guc->ct, p, true); 97 return 0; 98 } 99 100 static int guc_pc(struct xe_guc *guc, struct drm_printer *p) 101 { 102 xe_guc_pc_print(&guc->pc, p); 103 return 0; 104 } 105 106 /* 107 * only for GuC debugfs files which can be safely used on the VF as well: 108 * - without access to the GuC privileged registers 109 * - without access to the PF specific GuC objects 110 */ 111 static const struct drm_info_list vf_safe_debugfs_list[] = { 112 { "guc_info", .show = guc_debugfs_show, .data = xe_guc_print_info }, 113 { "guc_ctb", .show = guc_debugfs_show, .data = guc_ctb }, 114 }; 115 116 /* For GuC debugfs files that require the SLPC support */ 117 static const struct drm_info_list slpc_debugfs_list[] = { 118 { "guc_pc", .show = guc_debugfs_show, .data = guc_pc }, 119 }; 120 121 /* everything else should be added here */ 122 static const struct drm_info_list pf_only_debugfs_list[] = { 123 { "guc_log", .show = guc_debugfs_show, .data = guc_log }, 124 { "guc_log_dmesg", .show = guc_debugfs_show, .data = guc_log_dmesg }, 125 }; 126 127 void xe_guc_debugfs_register(struct xe_guc *guc, struct dentry *parent) 128 { 129 struct xe_device *xe = guc_to_xe(guc); 130 struct drm_minor *minor = xe->drm.primary; 131 132 drm_debugfs_create_files(vf_safe_debugfs_list, 133 ARRAY_SIZE(vf_safe_debugfs_list), 134 parent, minor); 135 136 if (!IS_SRIOV_VF(xe)) { 137 drm_debugfs_create_files(pf_only_debugfs_list, 138 ARRAY_SIZE(pf_only_debugfs_list), 139 parent, minor); 140 141 if (!xe->info.skip_guc_pc) 142 drm_debugfs_create_files(slpc_debugfs_list, 143 ARRAY_SIZE(slpc_debugfs_list), 144 parent, minor); 145 } 146 } 147