![Sam Ravnborg](/assets/img/avatar_default.png)
Drop the deprecated drmP.h header file, and trim msm_drv.h to the relevant include files. This resulted in a suprisingly many edits as many files relied on headers included via msm_drv.h. But msm_drv.h is not supposed to carry include files it do not need, so the individual files have to include what extra they needs. v2: - Rebased on top of https://gitlab.freedesktop.org/drm/msm.git msm-next Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Rob Clark <robdclark@gmail.com> Cc: Sean Paul <sean@poorly.run> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Jordan Crouse <jcrouse@codeaurora.org> Cc: Jeykumar Sankaran <jsanka@codeaurora.org> Cc: Bruce Wang <bzwang@chromium.org> Cc: Shayenne Moura <shayenneluzmoura@gmail.com> Cc: Mamta Shukla <mamtashukla555@gmail.com> Cc: Jonathan Marek <jonathan@marek.ca> Cc: Carsten Behling <carsten.behling@googlemail.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <maxime.ripard@bootlin.com> Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Cc: Sibi Sankar <sibis@codeaurora.org> Cc: Todor Tomov <todor.tomov@linaro.org> Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190804065551.GA5211@ravnborg.org
234 lines
4.6 KiB
C
234 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2013 Red Hat
|
|
* Author: Rob Clark <robdclark@gmail.com>
|
|
*/
|
|
|
|
/* For profiling, userspace can:
|
|
*
|
|
* tail -f /sys/kernel/debug/dri/<minor>/gpu
|
|
*
|
|
* This will enable performance counters/profiling to track the busy time
|
|
* and any gpu specific performance counters that are supported.
|
|
*/
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include <drm/drm_file.h>
|
|
|
|
#include "msm_drv.h"
|
|
#include "msm_gpu.h"
|
|
|
|
struct msm_perf_state {
|
|
struct drm_device *dev;
|
|
|
|
bool open;
|
|
int cnt;
|
|
struct mutex read_lock;
|
|
|
|
char buf[256];
|
|
int buftot, bufpos;
|
|
|
|
unsigned long next_jiffies;
|
|
};
|
|
|
|
#define SAMPLE_TIME (HZ/4)
|
|
|
|
/* wait for next sample time: */
|
|
static int wait_sample(struct msm_perf_state *perf)
|
|
{
|
|
unsigned long start_jiffies = jiffies;
|
|
|
|
if (time_after(perf->next_jiffies, start_jiffies)) {
|
|
unsigned long remaining_jiffies =
|
|
perf->next_jiffies - start_jiffies;
|
|
int ret = schedule_timeout_interruptible(remaining_jiffies);
|
|
if (ret > 0) {
|
|
/* interrupted */
|
|
return -ERESTARTSYS;
|
|
}
|
|
}
|
|
perf->next_jiffies += SAMPLE_TIME;
|
|
return 0;
|
|
}
|
|
|
|
static int refill_buf(struct msm_perf_state *perf)
|
|
{
|
|
struct msm_drm_private *priv = perf->dev->dev_private;
|
|
struct msm_gpu *gpu = priv->gpu;
|
|
char *ptr = perf->buf;
|
|
int rem = sizeof(perf->buf);
|
|
int i, n;
|
|
|
|
if ((perf->cnt++ % 32) == 0) {
|
|
/* Header line: */
|
|
n = snprintf(ptr, rem, "%%BUSY");
|
|
ptr += n;
|
|
rem -= n;
|
|
|
|
for (i = 0; i < gpu->num_perfcntrs; i++) {
|
|
const struct msm_gpu_perfcntr *perfcntr = &gpu->perfcntrs[i];
|
|
n = snprintf(ptr, rem, "\t%s", perfcntr->name);
|
|
ptr += n;
|
|
rem -= n;
|
|
}
|
|
} else {
|
|
/* Sample line: */
|
|
uint32_t activetime = 0, totaltime = 0;
|
|
uint32_t cntrs[5];
|
|
uint32_t val;
|
|
int ret;
|
|
|
|
/* sleep until next sample time: */
|
|
ret = wait_sample(perf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = msm_gpu_perfcntr_sample(gpu, &activetime, &totaltime,
|
|
ARRAY_SIZE(cntrs), cntrs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val = totaltime ? 1000 * activetime / totaltime : 0;
|
|
n = snprintf(ptr, rem, "%3d.%d%%", val / 10, val % 10);
|
|
ptr += n;
|
|
rem -= n;
|
|
|
|
for (i = 0; i < ret; i++) {
|
|
/* cycle counters (I think).. convert to MHz.. */
|
|
val = cntrs[i] / 10000;
|
|
n = snprintf(ptr, rem, "\t%5d.%02d",
|
|
val / 100, val % 100);
|
|
ptr += n;
|
|
rem -= n;
|
|
}
|
|
}
|
|
|
|
n = snprintf(ptr, rem, "\n");
|
|
ptr += n;
|
|
rem -= n;
|
|
|
|
perf->bufpos = 0;
|
|
perf->buftot = ptr - perf->buf;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t perf_read(struct file *file, char __user *buf,
|
|
size_t sz, loff_t *ppos)
|
|
{
|
|
struct msm_perf_state *perf = file->private_data;
|
|
int n = 0, ret = 0;
|
|
|
|
mutex_lock(&perf->read_lock);
|
|
|
|
if (perf->bufpos >= perf->buftot) {
|
|
ret = refill_buf(perf);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
n = min((int)sz, perf->buftot - perf->bufpos);
|
|
if (copy_to_user(buf, &perf->buf[perf->bufpos], n)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
perf->bufpos += n;
|
|
*ppos += n;
|
|
|
|
out:
|
|
mutex_unlock(&perf->read_lock);
|
|
if (ret)
|
|
return ret;
|
|
return n;
|
|
}
|
|
|
|
static int perf_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct msm_perf_state *perf = inode->i_private;
|
|
struct drm_device *dev = perf->dev;
|
|
struct msm_drm_private *priv = dev->dev_private;
|
|
struct msm_gpu *gpu = priv->gpu;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
|
|
if (perf->open || !gpu) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
file->private_data = perf;
|
|
perf->open = true;
|
|
perf->cnt = 0;
|
|
perf->buftot = 0;
|
|
perf->bufpos = 0;
|
|
msm_gpu_perfcntr_start(gpu);
|
|
perf->next_jiffies = jiffies + SAMPLE_TIME;
|
|
|
|
out:
|
|
mutex_unlock(&dev->struct_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int perf_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct msm_perf_state *perf = inode->i_private;
|
|
struct msm_drm_private *priv = perf->dev->dev_private;
|
|
msm_gpu_perfcntr_stop(priv->gpu);
|
|
perf->open = false;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct file_operations perf_debugfs_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = perf_open,
|
|
.read = perf_read,
|
|
.llseek = no_llseek,
|
|
.release = perf_release,
|
|
};
|
|
|
|
int msm_perf_debugfs_init(struct drm_minor *minor)
|
|
{
|
|
struct msm_drm_private *priv = minor->dev->dev_private;
|
|
struct msm_perf_state *perf;
|
|
|
|
/* only create on first minor: */
|
|
if (priv->perf)
|
|
return 0;
|
|
|
|
perf = kzalloc(sizeof(*perf), GFP_KERNEL);
|
|
if (!perf)
|
|
return -ENOMEM;
|
|
|
|
perf->dev = minor->dev;
|
|
|
|
mutex_init(&perf->read_lock);
|
|
priv->perf = perf;
|
|
|
|
debugfs_create_file("perf", S_IFREG | S_IRUGO, minor->debugfs_root,
|
|
perf, &perf_debugfs_fops);
|
|
return 0;
|
|
}
|
|
|
|
void msm_perf_debugfs_cleanup(struct msm_drm_private *priv)
|
|
{
|
|
struct msm_perf_state *perf = priv->perf;
|
|
|
|
if (!perf)
|
|
return;
|
|
|
|
priv->perf = NULL;
|
|
|
|
mutex_destroy(&perf->read_lock);
|
|
|
|
kfree(perf);
|
|
}
|
|
|
|
#endif
|