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/*
* Copyright © 2012 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.
*
* Authors:
* Ben Widawsky <ben@bwidawsk.net>
*
*/
#include <stdio.h>
#include <time.h>
#include "drm.h"
#include "rendercopy.h"
#define MSEC_PER_SEC 1000L
#define USEC_PER_MSEC 1000L
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define ENOUGH_WORK_IN_SECONDS 2
#define BUF_SIZE (8<<20)
#define BUF_PAGES ((8<<20)>>12)
drm_intel_bo *dst, *dst2;
/* returns time diff in milliseconds */
static int64_t
do_time_diff(struct timespec *end, struct timespec *start)
{
int64_t ret;
ret = (MSEC_PER_SEC * difftime(end->tv_sec, start->tv_sec)) +
((end->tv_nsec/NSEC_PER_MSEC) - (start->tv_nsec/NSEC_PER_MSEC));
return ret;
}
/* to avoid stupid depencies on libdrm, copy&paste */
struct local_drm_i915_gem_wait {
/** Handle of BO we shall wait on */
__u32 bo_handle;
__u32 flags;
/** Number of nanoseconds to wait, Returns time remaining. */
__u64 timeout_ns;
};
# define WAIT_IOCTL DRM_IOWR(DRM_COMMAND_BASE + 0x2c, struct local_drm_i915_gem_wait)
static int
gem_bo_wait_timeout(int fd, uint32_t handle, uint64_t *timeout_ns)
{
struct local_drm_i915_gem_wait wait;
int ret;
assert(timeout_ns);
wait.bo_handle = handle;
wait.timeout_ns = *timeout_ns;
wait.flags = 0;
ret = drmIoctl(fd, WAIT_IOCTL, &wait);
*timeout_ns = wait.timeout_ns;
return ret ? -errno : 0;
}
static bool
gem_bo_busy(int fd, uint32_t handle)
{
struct drm_i915_gem_busy busy;
busy.handle = handle;
do_or_die(drmIoctl(fd, DRM_IOCTL_I915_GEM_BUSY, &busy));
return !!busy.busy;
}
static void blt_color_fill(struct intel_batchbuffer *batch,
drm_intel_bo *buf,
const unsigned int pages)
{
const unsigned short height = pages/4;
const unsigned short width = 4096;
BEGIN_BATCH(5);
OUT_BATCH(COLOR_BLT_CMD |
COLOR_BLT_WRITE_ALPHA |
COLOR_BLT_WRITE_RGB);
OUT_BATCH((3 << 24) | /* 32 Bit Color */
0xF0 | /* Raster OP copy background register */
0); /* Dest pitch is 0 */
OUT_BATCH(width << 16 |
height);
OUT_RELOC(buf, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
OUT_BATCH(rand()); /* random pattern */
ADVANCE_BATCH();
}
int main(int argc, char **argv)
{
drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
uint64_t timeout = ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC;
int fd, ret;
const bool do_signals = true; /* signals will seem to make the operation
* use less process CPU time */
bool done = false;
int i, iter = 1;
fd = drm_open_any();
bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
drm_intel_bufmgr_gem_enable_reuse(bufmgr);
batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
dst = drm_intel_bo_alloc(bufmgr, "dst", BUF_SIZE, 4096);
dst2 = drm_intel_bo_alloc(bufmgr, "dst2", BUF_SIZE, 4096);
if (gem_bo_wait_timeout(fd, dst->handle, &timeout) == -EINVAL) {
printf("kernel doesn't support wait_timeout, skipping test\n");
return -77;
}
timeout = ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC;
/* Figure out a rough number of fills required to consume 1 second of
* GPU work.
*/
do {
struct timespec start, end;
long diff;
#ifndef CLOCK_MONOTONIC_RAW
#define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC
#endif
assert(clock_gettime(CLOCK_MONOTONIC_RAW, &start) == 0);
for (i = 0; i < iter; i++)
blt_color_fill(batch, dst, BUF_PAGES);
intel_batchbuffer_flush(batch);
drm_intel_bo_wait_rendering(dst);
assert(clock_gettime(CLOCK_MONOTONIC_RAW, &end) == 0);
diff = do_time_diff(&end, &start);
assert(diff >= 0);
if ((diff / MSEC_PER_SEC) > ENOUGH_WORK_IN_SECONDS)
done = true;
else
iter <<= 1;
} while (!done && iter < 1000000);
assert(iter < 1000000);
printf("%d iters is enough work\n", iter);
gem_quiescent_gpu(fd);
if (do_signals)
drmtest_fork_signal_helper();
/* We should be able to do half as much work in the same amount of time,
* but because we might schedule almost twice as much as required, we
* might accidentally time out. Hence add some fudge. */
for (i = 0; i < iter/3; i++)
blt_color_fill(batch, dst2, BUF_PAGES);
intel_batchbuffer_flush(batch);
assert(gem_bo_busy(fd, dst2->handle) == true);
ret = gem_bo_wait_timeout(fd, dst2->handle, &timeout);
if (ret) {
fprintf(stderr, "Timed wait failed %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
assert(gem_bo_busy(fd, dst2->handle) == false);
assert(timeout != 0);
if (timeout == (ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC))
printf("Buffer was already done!\n");
else {
printf("Finished with %lu time remaining\n", timeout);
}
/* check that polling with timeout=0 works. */
timeout = 0;
assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == 0);
assert(timeout == 0);
/* Now check that we correctly time out, twice the auto-tune load should
* be good enough. */
timeout = ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC;
for (i = 0; i < iter*2; i++)
blt_color_fill(batch, dst2, BUF_PAGES);
intel_batchbuffer_flush(batch);
ret = gem_bo_wait_timeout(fd, dst2->handle, &timeout);
assert(ret == -ETIME);
assert(timeout == 0);
assert(gem_bo_busy(fd, dst2->handle) == true);
/* check that polling with timeout=0 works. */
timeout = 0;
assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == -ETIME);
assert(timeout == 0);
if (do_signals)
drmtest_stop_signal_helper();
drm_intel_bo_unreference(dst2);
drm_intel_bo_unreference(dst);
intel_batchbuffer_free(batch);
drm_intel_bufmgr_destroy(bufmgr);
close(fd);
return 0;
}
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