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/*
* Copyright © 2013 Intel Corporation
*
* 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 <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include "igt_perf.h"
#include "gpu-top.h"
#define RING_TAIL 0x00
#define RING_HEAD 0x04
#define ADDR_MASK 0x001FFFFC
#define RING_CTL 0x0C
#define RING_WAIT (1<<11)
#define RING_WAIT_SEMAPHORE (1<<10)
static int perf_init(struct gpu_top *gt)
{
struct engine_desc {
unsigned class, inst;
const char *name;
} *d, engines[] = {
{ I915_ENGINE_CLASS_RENDER, 0, "rcs0" },
{ I915_ENGINE_CLASS_COPY, 0, "bcs0" },
{ I915_ENGINE_CLASS_VIDEO, 0, "vcs0" },
{ I915_ENGINE_CLASS_VIDEO, 1, "vcs1" },
{ I915_ENGINE_CLASS_VIDEO_ENHANCE, 0, "vecs0" },
{ 0, 0, NULL }
};
d = &engines[0];
gt->fd = perf_igfx_open_group(I915_PMU_ENGINE_BUSY(d->class, d->inst),
-1);
if (gt->fd < 0)
return -1;
if (perf_igfx_open_group(I915_PMU_ENGINE_WAIT(d->class, d->inst),
gt->fd) >= 0)
gt->have_wait = 1;
if (perf_igfx_open_group(I915_PMU_ENGINE_SEMA(d->class, d->inst),
gt->fd) >= 0)
gt->have_sema = 1;
gt->ring[0].name = d->name;
gt->num_rings = 1;
for (d++; d->name; d++) {
if (perf_igfx_open_group(I915_PMU_ENGINE_BUSY(d->class,
d->inst),
gt->fd) < 0)
continue;
if (gt->have_wait &&
perf_igfx_open_group(I915_PMU_ENGINE_WAIT(d->class,
d->inst),
gt->fd) < 0)
return -1;
if (gt->have_sema &&
perf_igfx_open_group(I915_PMU_ENGINE_SEMA(d->class,
d->inst),
gt->fd) < 0)
return -1;
gt->ring[gt->num_rings++].name = d->name;
}
return 0;
}
void gpu_top_init(struct gpu_top *gt)
{
memset(gt, 0, sizeof(*gt));
gt->fd = -1;
perf_init(gt);
}
int gpu_top_update(struct gpu_top *gt)
{
uint32_t data[1024];
int update, len;
if (gt->fd < 0)
return 0;
if (gt->type == PERF) {
struct gpu_top_stat *s = >->stat[gt->count++&1];
struct gpu_top_stat *d = >->stat[gt->count&1];
uint64_t *sample, d_time;
int n, m;
len = read(gt->fd, data, sizeof(data));
if (len < 0)
return 0;
sample = (uint64_t *)data + 1;
s->time = *sample++;
for (n = m = 0; n < gt->num_rings; n++) {
s->busy[n] = sample[m++];
if (gt->have_wait)
s->wait[n] = sample[m++];
if (gt->have_sema)
s->sema[n] = sample[m++];
}
if (gt->count == 1)
return 0;
d_time = s->time - d->time;
for (n = 0; n < gt->num_rings; n++) {
gt->ring[n].u.u.busy = (100 * (s->busy[n] - d->busy[n]) + d_time/2) / d_time;
if (gt->have_wait)
gt->ring[n].u.u.wait = (100 * (s->wait[n] - d->wait[n]) + d_time/2) / d_time;
if (gt->have_sema)
gt->ring[n].u.u.sema = (100 * (s->sema[n] - d->sema[n]) + d_time/2) / d_time;
/* in case of rounding + sampling errors, fudge */
if (gt->ring[n].u.u.busy > 100)
gt->ring[n].u.u.busy = 100;
if (gt->ring[n].u.u.wait > 100)
gt->ring[n].u.u.wait = 100;
if (gt->ring[n].u.u.sema > 100)
gt->ring[n].u.u.sema = 100;
}
update = 1;
} else {
while ((len = read(gt->fd, data, sizeof(data))) > 0) {
uint32_t *ptr = &data[len/sizeof(uint32_t) - MAX_RINGS];
gt->ring[0].u.payload = ptr[0];
gt->ring[1].u.payload = ptr[1];
gt->ring[2].u.payload = ptr[2];
gt->ring[3].u.payload = ptr[3];
update = 1;
}
}
return update;
}
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