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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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23 #include <linux/debugfs.h>
24 #include <linux/list_sort.h>
28 struct mmio_diff_param {
29 struct intel_vgpu *vgpu;
32 struct list_head diff_mmio_list;
36 struct list_head node;
42 /* Compare two diff_mmio items. */
43 static int mmio_offset_compare(void *priv,
44 struct list_head *a, struct list_head *b)
49 ma = container_of(a, struct diff_mmio, node);
50 mb = container_of(b, struct diff_mmio, node);
51 if (ma->offset < mb->offset)
53 else if (ma->offset > mb->offset)
58 static inline int mmio_diff_handler(struct intel_gvt *gvt,
59 u32 offset, void *data)
61 struct drm_i915_private *i915 = gvt->dev_priv;
62 struct mmio_diff_param *param = data;
63 struct diff_mmio *node;
66 preg = intel_uncore_read_notrace(&i915->uncore, _MMIO(offset));
67 vreg = vgpu_vreg(param->vgpu, offset);
70 node = kmalloc(sizeof(*node), GFP_KERNEL);
74 node->offset = offset;
77 list_add(&node->node, ¶m->diff_mmio_list);
84 /* Show the all the different values of tracked mmio. */
85 static int vgpu_mmio_diff_show(struct seq_file *s, void *unused)
87 struct intel_vgpu *vgpu = s->private;
88 struct intel_gvt *gvt = vgpu->gvt;
89 struct mmio_diff_param param = {
94 struct diff_mmio *node, *next;
96 INIT_LIST_HEAD(¶m.diff_mmio_list);
98 mutex_lock(&gvt->lock);
99 spin_lock_bh(&gvt->scheduler.mmio_context_lock);
101 mmio_hw_access_pre(gvt->dev_priv);
102 /* Recognize all the diff mmios to list. */
103 intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, ¶m);
104 mmio_hw_access_post(gvt->dev_priv);
106 spin_unlock_bh(&gvt->scheduler.mmio_context_lock);
107 mutex_unlock(&gvt->lock);
109 /* In an ascending order by mmio offset. */
110 list_sort(NULL, ¶m.diff_mmio_list, mmio_offset_compare);
112 seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff");
113 list_for_each_entry_safe(node, next, ¶m.diff_mmio_list, node) {
114 u32 diff = node->preg ^ node->vreg;
116 seq_printf(s, "%08x %08x %08x %*pbl\n",
117 node->offset, node->preg, node->vreg,
119 list_del(&node->node);
122 seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff);
125 DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff);
128 vgpu_scan_nonprivbb_get(void *data, u64 *val)
130 struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
132 *val = vgpu->scan_nonprivbb;
137 * set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning
138 * of non-privileged batch buffer. e.g.
139 * if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer
143 vgpu_scan_nonprivbb_set(void *data, u64 val)
145 struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
147 vgpu->scan_nonprivbb = val;
151 DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
152 vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
156 * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
159 void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
163 snprintf(name, 16, "vgpu%d", vgpu->id);
164 vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
166 debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active);
167 debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,
168 &vgpu_mmio_diff_fops);
169 debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
170 &vgpu_scan_nonprivbb_fops);
174 * intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU
177 void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)
179 debugfs_remove_recursive(vgpu->debugfs);
180 vgpu->debugfs = NULL;
184 * intel_gvt_debugfs_init - register gvt debugfs root entry
187 void intel_gvt_debugfs_init(struct intel_gvt *gvt)
189 struct drm_minor *minor = gvt->dev_priv->drm.primary;
191 gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root);
193 debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root,
194 &gvt->mmio.num_tracked_mmio);
198 * intel_gvt_debugfs_clean - remove debugfs entries
201 void intel_gvt_debugfs_clean(struct intel_gvt *gvt)
203 debugfs_remove_recursive(gvt->debugfs_root);
204 gvt->debugfs_root = NULL;