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 24 #include <linux/debugfs.h> 25 #include <linux/list_sort.h> 26 27 #include "gvt.h" 28 #include "i915_drv.h" 29 30 struct mmio_diff_param { 31 struct intel_vgpu *vgpu; 32 int total; 33 int diff; 34 struct list_head diff_mmio_list; 35 }; 36 37 struct diff_mmio { 38 struct list_head node; 39 u32 offset; 40 u32 preg; 41 u32 vreg; 42 }; 43 44 /* Compare two diff_mmio items. */ 45 static int mmio_offset_compare(void *priv, 46 const struct list_head *a, const struct list_head *b) 47 { 48 struct diff_mmio *ma; 49 struct diff_mmio *mb; 50 51 ma = container_of(a, struct diff_mmio, node); 52 mb = container_of(b, struct diff_mmio, node); 53 if (ma->offset < mb->offset) 54 return -1; 55 else if (ma->offset > mb->offset) 56 return 1; 57 return 0; 58 } 59 60 static inline int mmio_diff_handler(struct intel_gvt *gvt, 61 u32 offset, void *data) 62 { 63 struct mmio_diff_param *param = data; 64 struct diff_mmio *node; 65 u32 preg, vreg; 66 67 preg = intel_uncore_read_notrace(gvt->gt->uncore, _MMIO(offset)); 68 vreg = vgpu_vreg(param->vgpu, offset); 69 70 if (preg != vreg) { 71 node = kmalloc(sizeof(*node), GFP_ATOMIC); 72 if (!node) 73 return -ENOMEM; 74 75 node->offset = offset; 76 node->preg = preg; 77 node->vreg = vreg; 78 list_add(&node->node, ¶m->diff_mmio_list); 79 param->diff++; 80 } 81 param->total++; 82 return 0; 83 } 84 85 /* Show the all the different values of tracked mmio. */ 86 static int vgpu_mmio_diff_show(struct seq_file *s, void *unused) 87 { 88 struct intel_vgpu *vgpu = s->private; 89 struct intel_gvt *gvt = vgpu->gvt; 90 struct mmio_diff_param param = { 91 .vgpu = vgpu, 92 .total = 0, 93 .diff = 0, 94 }; 95 struct diff_mmio *node, *next; 96 intel_wakeref_t wakeref; 97 98 INIT_LIST_HEAD(¶m.diff_mmio_list); 99 100 mutex_lock(&gvt->lock); 101 spin_lock_bh(&gvt->scheduler.mmio_context_lock); 102 103 wakeref = mmio_hw_access_pre(gvt->gt); 104 /* Recognize all the diff mmios to list. */ 105 intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, ¶m); 106 mmio_hw_access_post(gvt->gt, wakeref); 107 108 spin_unlock_bh(&gvt->scheduler.mmio_context_lock); 109 mutex_unlock(&gvt->lock); 110 111 /* In an ascending order by mmio offset. */ 112 list_sort(NULL, ¶m.diff_mmio_list, mmio_offset_compare); 113 114 seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff"); 115 list_for_each_entry_safe(node, next, ¶m.diff_mmio_list, node) { 116 u32 diff = node->preg ^ node->vreg; 117 118 seq_printf(s, "%08x %08x %08x %*pbl\n", 119 node->offset, node->preg, node->vreg, 120 32, &diff); 121 list_del(&node->node); 122 kfree(node); 123 } 124 seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff); 125 return 0; 126 } 127 DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff); 128 129 static int 130 vgpu_scan_nonprivbb_get(void *data, u64 *val) 131 { 132 struct intel_vgpu *vgpu = (struct intel_vgpu *)data; 133 134 *val = vgpu->scan_nonprivbb; 135 return 0; 136 } 137 138 /* 139 * set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning 140 * of non-privileged batch buffer. e.g. 141 * if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer 142 * on engine 0 and 1. 143 */ 144 static int 145 vgpu_scan_nonprivbb_set(void *data, u64 val) 146 { 147 struct intel_vgpu *vgpu = (struct intel_vgpu *)data; 148 149 vgpu->scan_nonprivbb = val; 150 return 0; 151 } 152 153 DEFINE_DEBUGFS_ATTRIBUTE(vgpu_scan_nonprivbb_fops, 154 vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set, 155 "0x%llx\n"); 156 157 static int vgpu_status_get(void *data, u64 *val) 158 { 159 struct intel_vgpu *vgpu = (struct intel_vgpu *)data; 160 161 *val = 0; 162 163 if (test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) 164 *val |= (1 << INTEL_VGPU_STATUS_ATTACHED); 165 if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status)) 166 *val |= (1 << INTEL_VGPU_STATUS_ACTIVE); 167 168 return 0; 169 } 170 171 DEFINE_DEBUGFS_ATTRIBUTE(vgpu_status_fops, vgpu_status_get, NULL, "0x%llx\n"); 172 173 /** 174 * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU 175 * @vgpu: a vGPU 176 */ 177 void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu) 178 { 179 char name[16] = ""; 180 181 snprintf(name, 16, "vgpu%d", vgpu->id); 182 vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root); 183 184 debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu, 185 &vgpu_mmio_diff_fops); 186 debugfs_create_file_unsafe("scan_nonprivbb", 0644, vgpu->debugfs, vgpu, 187 &vgpu_scan_nonprivbb_fops); 188 debugfs_create_file_unsafe("status", 0644, vgpu->debugfs, vgpu, 189 &vgpu_status_fops); 190 } 191 192 /** 193 * intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU 194 * @vgpu: a vGPU 195 */ 196 void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu) 197 { 198 struct intel_gvt *gvt = vgpu->gvt; 199 struct dentry *debugfs_root = gvt->gt->i915->drm.debugfs_root; 200 201 if (debugfs_root && gvt->debugfs_root) { 202 debugfs_remove_recursive(vgpu->debugfs); 203 vgpu->debugfs = NULL; 204 } 205 } 206 207 /** 208 * intel_gvt_debugfs_init - register gvt debugfs root entry 209 * @gvt: GVT device 210 */ 211 void intel_gvt_debugfs_init(struct intel_gvt *gvt) 212 { 213 struct dentry *debugfs_root = gvt->gt->i915->drm.debugfs_root; 214 215 gvt->debugfs_root = debugfs_create_dir("gvt", debugfs_root); 216 217 debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root, 218 &gvt->mmio.num_tracked_mmio); 219 } 220 221 /** 222 * intel_gvt_debugfs_clean - remove debugfs entries 223 * @gvt: GVT device 224 */ 225 void intel_gvt_debugfs_clean(struct intel_gvt *gvt) 226 { 227 struct dentry *debugfs_root = gvt->gt->i915->drm.debugfs_root; 228 229 if (debugfs_root) { 230 debugfs_remove_recursive(gvt->debugfs_root); 231 gvt->debugfs_root = NULL; 232 } 233 } 234