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1/*2 * Copyright(c) 2011-2017 Intel Corporation. All rights reserved.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * 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 THE21 * SOFTWARE.22 */23#include <linux/debugfs.h>24#include <linux/list_sort.h>25#include "i915_drv.h"26#include "gvt.h"27 28struct mmio_diff_param {29 struct intel_vgpu *vgpu;30 int total;31 int diff;32 struct list_head diff_mmio_list;33};34 35struct diff_mmio {36 struct list_head node;37 u32 offset;38 u32 preg;39 u32 vreg;40};41 42/* Compare two diff_mmio items. */43static int mmio_offset_compare(void *priv,44 const struct list_head *a, const 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 58static 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. */84static 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}124DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff);125 126static int127vgpu_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 scanning137 * of non-privileged batch buffer. e.g.138 * if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer139 * on engine 0 and 1.140 */141static int142vgpu_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 150DEFINE_DEBUGFS_ATTRIBUTE(vgpu_scan_nonprivbb_fops,151 vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,152 "0x%llx\n");153 154static int vgpu_status_get(void *data, u64 *val)155{156 struct intel_vgpu *vgpu = (struct intel_vgpu *)data;157 158 *val = 0;159 160 if (test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))161 *val |= (1 << INTEL_VGPU_STATUS_ATTACHED);162 if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))163 *val |= (1 << INTEL_VGPU_STATUS_ACTIVE);164 165 return 0;166}167 168DEFINE_DEBUGFS_ATTRIBUTE(vgpu_status_fops, vgpu_status_get, NULL, "0x%llx\n");169 170/**171 * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU172 * @vgpu: a vGPU173 */174void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)175{176 char name[16] = "";177 178 snprintf(name, 16, "vgpu%d", vgpu->id);179 vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);180 181 debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,182 &vgpu_mmio_diff_fops);183 debugfs_create_file_unsafe("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,184 &vgpu_scan_nonprivbb_fops);185 debugfs_create_file_unsafe("status", 0644, vgpu->debugfs, vgpu,186 &vgpu_status_fops);187}188 189/**190 * intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU191 * @vgpu: a vGPU192 */193void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)194{195 struct intel_gvt *gvt = vgpu->gvt;196 struct drm_minor *minor = gvt->gt->i915->drm.primary;197 198 if (minor->debugfs_root && gvt->debugfs_root) {199 debugfs_remove_recursive(vgpu->debugfs);200 vgpu->debugfs = NULL;201 }202}203 204/**205 * intel_gvt_debugfs_init - register gvt debugfs root entry206 * @gvt: GVT device207 */208void intel_gvt_debugfs_init(struct intel_gvt *gvt)209{210 struct drm_minor *minor = gvt->gt->i915->drm.primary;211 212 gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root);213 214 debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root,215 &gvt->mmio.num_tracked_mmio);216}217 218/**219 * intel_gvt_debugfs_clean - remove debugfs entries220 * @gvt: GVT device221 */222void intel_gvt_debugfs_clean(struct intel_gvt *gvt)223{224 struct drm_minor *minor = gvt->gt->i915->drm.primary;225 226 if (minor->debugfs_root) {227 debugfs_remove_recursive(gvt->debugfs_root);228 gvt->debugfs_root = NULL;229 }230}231