269 lines
6.6 KiB
C
269 lines
6.6 KiB
C
/*
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* Copyright(c) 2011-2017 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/debugfs.h>
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#include <linux/list_sort.h>
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#include "i915_drv.h"
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#include "gvt.h"
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struct mmio_diff_param {
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struct intel_vgpu *vgpu;
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int total;
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int diff;
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struct list_head diff_mmio_list;
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};
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struct diff_mmio {
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struct list_head node;
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u32 offset;
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u32 preg;
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u32 vreg;
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};
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/* Compare two diff_mmio items. */
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static int mmio_offset_compare(void *priv,
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struct list_head *a, struct list_head *b)
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{
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struct diff_mmio *ma;
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struct diff_mmio *mb;
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ma = container_of(a, struct diff_mmio, node);
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mb = container_of(b, struct diff_mmio, node);
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if (ma->offset < mb->offset)
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return -1;
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else if (ma->offset > mb->offset)
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return 1;
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return 0;
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}
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static inline int mmio_diff_handler(struct intel_gvt *gvt,
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u32 offset, void *data)
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{
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struct drm_i915_private *dev_priv = gvt->dev_priv;
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struct mmio_diff_param *param = data;
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struct diff_mmio *node;
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u32 preg, vreg;
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preg = I915_READ_NOTRACE(_MMIO(offset));
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vreg = vgpu_vreg(param->vgpu, offset);
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if (preg != vreg) {
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node = kmalloc(sizeof(*node), GFP_KERNEL);
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if (!node)
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return -ENOMEM;
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node->offset = offset;
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node->preg = preg;
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node->vreg = vreg;
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list_add(&node->node, ¶m->diff_mmio_list);
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param->diff++;
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}
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param->total++;
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return 0;
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}
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/* Show the all the different values of tracked mmio. */
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static int vgpu_mmio_diff_show(struct seq_file *s, void *unused)
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{
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struct intel_vgpu *vgpu = s->private;
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struct intel_gvt *gvt = vgpu->gvt;
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struct mmio_diff_param param = {
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.vgpu = vgpu,
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.total = 0,
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.diff = 0,
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};
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struct diff_mmio *node, *next;
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INIT_LIST_HEAD(¶m.diff_mmio_list);
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mutex_lock(&gvt->lock);
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spin_lock_bh(&gvt->scheduler.mmio_context_lock);
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mmio_hw_access_pre(gvt->dev_priv);
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/* Recognize all the diff mmios to list. */
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intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, ¶m);
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mmio_hw_access_post(gvt->dev_priv);
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spin_unlock_bh(&gvt->scheduler.mmio_context_lock);
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mutex_unlock(&gvt->lock);
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/* In an ascending order by mmio offset. */
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list_sort(NULL, ¶m.diff_mmio_list, mmio_offset_compare);
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seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff");
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list_for_each_entry_safe(node, next, ¶m.diff_mmio_list, node) {
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u32 diff = node->preg ^ node->vreg;
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seq_printf(s, "%08x %08x %08x %*pbl\n",
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node->offset, node->preg, node->vreg,
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32, &diff);
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list_del(&node->node);
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kfree(node);
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}
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seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff);
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static int
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vgpu_scan_nonprivbb_get(void *data, u64 *val)
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{
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struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
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*val = vgpu->scan_nonprivbb;
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return 0;
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}
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/*
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* set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning
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* of non-privileged batch buffer. e.g.
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* if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer
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* on engine 0 and 1.
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*/
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static int
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vgpu_scan_nonprivbb_set(void *data, u64 val)
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{
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struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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enum intel_engine_id id;
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char buf[128], *s;
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int len;
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val &= (1 << I915_NUM_ENGINES) - 1;
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if (vgpu->scan_nonprivbb == val)
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return 0;
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if (!val)
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goto done;
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len = sprintf(buf,
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"gvt: vgpu %d turns on non-privileged batch buffers scanning on Engines:",
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vgpu->id);
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s = buf + len;
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for (id = 0; id < I915_NUM_ENGINES; id++) {
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struct intel_engine_cs *engine;
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engine = dev_priv->engine[id];
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if (engine && (val & (1 << id))) {
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len = snprintf(s, 4, "%d, ", engine->id);
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s += len;
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} else
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val &= ~(1 << id);
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}
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if (val)
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sprintf(s, "low performance expected.");
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pr_warn("%s\n", buf);
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done:
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vgpu->scan_nonprivbb = val;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
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vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
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"0x%llx\n");
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/**
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* intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
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* @vgpu: a vGPU
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*/
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int intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
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{
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struct dentry *ent;
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char name[10] = "";
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sprintf(name, "vgpu%d", vgpu->id);
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vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
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if (!vgpu->debugfs)
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return -ENOMEM;
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ent = debugfs_create_bool("active", 0444, vgpu->debugfs,
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&vgpu->active);
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if (!ent)
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return -ENOMEM;
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ent = debugfs_create_file("mmio_diff", 0444, vgpu->debugfs,
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vgpu, &vgpu_mmio_diff_fops);
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if (!ent)
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return -ENOMEM;
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ent = debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs,
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vgpu, &vgpu_scan_nonprivbb_fops);
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if (!ent)
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return -ENOMEM;
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return 0;
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}
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/**
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* intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU
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* @vgpu: a vGPU
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*/
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void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)
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{
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debugfs_remove_recursive(vgpu->debugfs);
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vgpu->debugfs = NULL;
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}
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/**
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* intel_gvt_debugfs_init - register gvt debugfs root entry
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* @gvt: GVT device
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*
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* Returns:
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* zero on success, negative if failed.
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*/
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int intel_gvt_debugfs_init(struct intel_gvt *gvt)
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{
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struct drm_minor *minor = gvt->dev_priv->drm.primary;
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struct dentry *ent;
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gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root);
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if (!gvt->debugfs_root) {
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gvt_err("Cannot create debugfs dir\n");
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return -ENOMEM;
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}
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ent = debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root,
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&gvt->mmio.num_tracked_mmio);
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if (!ent)
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return -ENOMEM;
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return 0;
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}
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/**
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* intel_gvt_debugfs_clean - remove debugfs entries
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* @gvt: GVT device
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*/
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void intel_gvt_debugfs_clean(struct intel_gvt *gvt)
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{
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debugfs_remove_recursive(gvt->debugfs_root);
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gvt->debugfs_root = NULL;
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}
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