1 /* 2 * Copyright(c) 2011-2017 Intel Corporation. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 */ 23 #include <linux/debugfs.h> 24 #include <linux/list_sort.h> 25 #include "i915_drv.h" 26 #include "gvt.h" 27 28 struct mmio_diff_param { 29 struct intel_vgpu *vgpu; 30 int total; 31 int diff; 32 struct list_head diff_mmio_list; 33 }; 34 35 struct diff_mmio { 36 struct list_head node; 37 u32 offset; 38 u32 preg; 39 u32 vreg; 40 }; 41 42 /* Compare two diff_mmio items. */ 43 static int mmio_offset_compare(void *priv, 44 struct list_head *a, struct list_head *b) 45 { 46 struct diff_mmio *ma; 47 struct diff_mmio *mb; 48 49 ma = container_of(a, struct diff_mmio, node); 50 mb = container_of(b, struct diff_mmio, node); 51 if (ma->offset < mb->offset) 52 return -1; 53 else if (ma->offset > mb->offset) 54 return 1; 55 return 0; 56 } 57 58 static inline int mmio_diff_handler(struct intel_gvt *gvt, 59 u32 offset, void *data) 60 { 61 struct mmio_diff_param *param = data; 62 struct diff_mmio *node; 63 u32 preg, vreg; 64 65 preg = intel_uncore_read_notrace(gvt->gt->uncore, _MMIO(offset)); 66 vreg = vgpu_vreg(param->vgpu, offset); 67 68 if (preg != vreg) { 69 node = kmalloc(sizeof(*node), GFP_ATOMIC); 70 if (!node) 71 return -ENOMEM; 72 73 node->offset = offset; 74 node->preg = preg; 75 node->vreg = vreg; 76 list_add(&node->node, ¶m->diff_mmio_list); 77 param->diff++; 78 } 79 param->total++; 80 return 0; 81 } 82 83 /* Show the all the different values of tracked mmio. */ 84 static int vgpu_mmio_diff_show(struct seq_file *s, void *unused) 85 { 86 struct intel_vgpu *vgpu = s->private; 87 struct intel_gvt *gvt = vgpu->gvt; 88 struct mmio_diff_param param = { 89 .vgpu = vgpu, 90 .total = 0, 91 .diff = 0, 92 }; 93 struct diff_mmio *node, *next; 94 95 INIT_LIST_HEAD(¶m.diff_mmio_list); 96 97 mutex_lock(&gvt->lock); 98 spin_lock_bh(&gvt->scheduler.mmio_context_lock); 99 100 mmio_hw_access_pre(gvt->gt); 101 /* Recognize all the diff mmios to list. */ 102 intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, ¶m); 103 mmio_hw_access_post(gvt->gt); 104 105 spin_unlock_bh(&gvt->scheduler.mmio_context_lock); 106 mutex_unlock(&gvt->lock); 107 108 /* In an ascending order by mmio offset. */ 109 list_sort(NULL, ¶m.diff_mmio_list, mmio_offset_compare); 110 111 seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff"); 112 list_for_each_entry_safe(node, next, ¶m.diff_mmio_list, node) { 113 u32 diff = node->preg ^ node->vreg; 114 115 seq_printf(s, "%08x %08x %08x %*pbl\n", 116 node->offset, node->preg, node->vreg, 117 32, &diff); 118 list_del(&node->node); 119 kfree(node); 120 } 121 seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff); 122 return 0; 123 } 124 DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff); 125 126 static int 127 vgpu_scan_nonprivbb_get(void *data, u64 *val) 128 { 129 struct intel_vgpu *vgpu = (struct intel_vgpu *)data; 130 131 *val = vgpu->scan_nonprivbb; 132 return 0; 133 } 134 135 /* 136 * set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning 137 * of non-privileged batch buffer. e.g. 138 * if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer 139 * on engine 0 and 1. 140 */ 141 static int 142 vgpu_scan_nonprivbb_set(void *data, u64 val) 143 { 144 struct intel_vgpu *vgpu = (struct intel_vgpu *)data; 145 146 vgpu->scan_nonprivbb = val; 147 return 0; 148 } 149 150 DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops, 151 vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set, 152 "0x%llx\n"); 153 154 /** 155 * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU 156 * @vgpu: a vGPU 157 */ 158 void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu) 159 { 160 char name[16] = ""; 161 162 snprintf(name, 16, "vgpu%d", vgpu->id); 163 vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root); 164 165 debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active); 166 debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu, 167 &vgpu_mmio_diff_fops); 168 debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu, 169 &vgpu_scan_nonprivbb_fops); 170 } 171 172 /** 173 * intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU 174 * @vgpu: a vGPU 175 */ 176 void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu) 177 { 178 debugfs_remove_recursive(vgpu->debugfs); 179 vgpu->debugfs = NULL; 180 } 181 182 /** 183 * intel_gvt_debugfs_init - register gvt debugfs root entry 184 * @gvt: GVT device 185 */ 186 void intel_gvt_debugfs_init(struct intel_gvt *gvt) 187 { 188 struct drm_minor *minor = gvt->gt->i915->drm.primary; 189 190 gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root); 191 192 debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root, 193 &gvt->mmio.num_tracked_mmio); 194 } 195 196 /** 197 * intel_gvt_debugfs_clean - remove debugfs entries 198 * @gvt: GVT device 199 */ 200 void intel_gvt_debugfs_clean(struct intel_gvt *gvt) 201 { 202 debugfs_remove_recursive(gvt->debugfs_root); 203 gvt->debugfs_root = NULL; 204 } 205