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/*
* Copyright(c) 2011-2017 Intel Corporation. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/debugfs.h>
#include <linux/list_sort.h>
#include "i915_drv.h"
#include "gvt.h"
struct mmio_diff_param {
struct intel_vgpu *vgpu;
int total;
int diff;
struct list_head diff_mmio_list;
};
struct diff_mmio {
struct list_head node;
u32 offset;
u32 preg;
u32 vreg;
};
/* Compare two diff_mmio items. */
static int mmio_offset_compare(void *priv,
struct list_head *a, struct list_head *b)
{
struct diff_mmio *ma;
struct diff_mmio *mb;
ma = container_of(a, struct diff_mmio, node);
mb = container_of(b, struct diff_mmio, node);
if (ma->offset < mb->offset)
return -1;
else if (ma->offset > mb->offset)
return 1;
return 0;
}
static inline int mmio_diff_handler(struct intel_gvt *gvt,
u32 offset, void *data)
{
struct drm_i915_private *i915 = gvt->dev_priv;
struct mmio_diff_param *param = data;
struct diff_mmio *node;
u32 preg, vreg;
preg = intel_uncore_read_notrace(&i915->uncore, _MMIO(offset));
vreg = vgpu_vreg(param->vgpu, offset);
if (preg != vreg) {
node = kmalloc(sizeof(*node), GFP_KERNEL);
if (!node)
return -ENOMEM;
node->offset = offset;
node->preg = preg;
node->vreg = vreg;
list_add(&node->node, ¶m->diff_mmio_list);
param->diff++;
}
param->total++;
return 0;
}
/* Show the all the different values of tracked mmio. */
static int vgpu_mmio_diff_show(struct seq_file *s, void *unused)
{
struct intel_vgpu *vgpu = s->private;
struct intel_gvt *gvt = vgpu->gvt;
struct mmio_diff_param param = {
.vgpu = vgpu,
.total = 0,
.diff = 0,
};
struct diff_mmio *node, *next;
INIT_LIST_HEAD(¶m.diff_mmio_list);
mutex_lock(&gvt->lock);
spin_lock_bh(&gvt->scheduler.mmio_context_lock);
mmio_hw_access_pre(gvt->dev_priv);
/* Recognize all the diff mmios to list. */
intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, ¶m);
mmio_hw_access_post(gvt->dev_priv);
spin_unlock_bh(&gvt->scheduler.mmio_context_lock);
mutex_unlock(&gvt->lock);
/* In an ascending order by mmio offset. */
list_sort(NULL, ¶m.diff_mmio_list, mmio_offset_compare);
seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff");
list_for_each_entry_safe(node, next, ¶m.diff_mmio_list, node) {
u32 diff = node->preg ^ node->vreg;
seq_printf(s, "%08x %08x %08x %*pbl\n",
node->offset, node->preg, node->vreg,
32, &diff);
list_del(&node->node);
kfree(node);
}
seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff);
static int
vgpu_scan_nonprivbb_get(void *data, u64 *val)
{
struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
*val = vgpu->scan_nonprivbb;
return 0;
}
/*
* set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning
* of non-privileged batch buffer. e.g.
* if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer
* on engine 0 and 1.
*/
static int
vgpu_scan_nonprivbb_set(void *data, u64 val)
{
struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
enum intel_engine_id id;
char buf[128], *s;
int len;
val &= (1 << I915_NUM_ENGINES) - 1;
if (vgpu->scan_nonprivbb == val)
return 0;
if (!val)
goto done;
len = sprintf(buf,
"gvt: vgpu %d turns on non-privileged batch buffers scanning on Engines:",
vgpu->id);
s = buf + len;
for (id = 0; id < I915_NUM_ENGINES; id++) {
struct intel_engine_cs *engine;
engine = dev_priv->engine[id];
if (engine && (val & (1 << id))) {
len = snprintf(s, 4, "%d, ", engine->id);
s += len;
} else
val &= ~(1 << id);
}
if (val)
sprintf(s, "low performance expected.");
pr_warn("%s\n", buf);
done:
vgpu->scan_nonprivbb = val;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
"0x%llx\n");
/**
* intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
* @vgpu: a vGPU
*/
void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
{
char name[16] = "";
snprintf(name, 16, "vgpu%d", vgpu->id);
vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active);
debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,
&vgpu_mmio_diff_fops);
debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
&vgpu_scan_nonprivbb_fops);
}
/**
* intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU
* @vgpu: a vGPU
*/
void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)
{
debugfs_remove_recursive(vgpu->debugfs);
vgpu->debugfs = NULL;
}
/**
* intel_gvt_debugfs_init - register gvt debugfs root entry
* @gvt: GVT device
*/
void intel_gvt_debugfs_init(struct intel_gvt *gvt)
{
struct drm_minor *minor = gvt->dev_priv->drm.primary;
gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root);
debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root,
&gvt->mmio.num_tracked_mmio);
}
/**
* intel_gvt_debugfs_clean - remove debugfs entries
* @gvt: GVT device
*/
void intel_gvt_debugfs_clean(struct intel_gvt *gvt)
{
debugfs_remove_recursive(gvt->debugfs_root);
gvt->debugfs_root = NULL;
}
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