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/*
* Copyright © 2011 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:
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
*/
/*
* Testcase: Test the CS prefetch behaviour on batches
*
* Historically the batch prefetcher doesn't check whether it's crossing page
* boundaries and likes to throw up when it gets a pagefault in return for his
* over-eager behaviour. Check for this.
*
* This test for a bug where we've failed to plug a scratch pte entry into the
* very last gtt pte.
*/
#include "igt.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <drm.h>
#include "intel_bufmgr.h"
IGT_TEST_DESCRIPTION("Test the CS prefetch behaviour on batches.");
static drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
static void exec(int fd, uint32_t handle)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 gem_exec[1];
memset(gem_exec, 0, sizeof(gem_exec));
gem_exec[0].handle = handle;
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)gem_exec;
execbuf.buffer_count = 1;
execbuf.batch_start_offset = 0;
execbuf.batch_len = 4096;
gem_execbuf(fd, &execbuf);
gem_sync(fd, handle);
}
igt_simple_main
{
uint32_t batch_end[4] = {MI_BATCH_BUFFER_END, 0, 0, 0};
int fd, i, ret;
uint64_t aper_size;
int count;
drm_intel_bo *sample_batch_bo;
igt_skip_on_simulation();
fd = drm_open_driver(DRIVER_INTEL);
bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
igt_assert(bufmgr);
drm_intel_bufmgr_gem_enable_reuse(bufmgr);
aper_size = gem_aperture_size(fd);
/* presume a big per-bo overhead */
igt_skip_on_f(intel_get_total_ram_mb() < (aper_size / (1024*1024)) * 3 / 2,
"not enough mem to run test\n");
count = aper_size / 4096;
batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
igt_assert(batch);
sample_batch_bo = drm_intel_bo_alloc(bufmgr, "", 4096, 4096);
igt_assert(sample_batch_bo);
ret = drm_intel_bo_subdata(sample_batch_bo, 4096-sizeof(batch_end),
sizeof(batch_end), batch_end);
igt_assert(ret == 0);
/* fill the entire gart with batches and run them */
for (i = 0; i < count; i++) {
drm_intel_bo *batch_bo;
batch_bo = drm_intel_bo_alloc(bufmgr, "", 4096, 4096);
igt_assert(batch_bo);
/* copy the sample batch with the gpu to the new one, so that we
* also test the unmappable part of the gtt. */
BLIT_COPY_BATCH_START(0);
OUT_BATCH((3 << 24) | /* 32 bits */
(0xcc << 16) | /* copy ROP */
4096);
OUT_BATCH(0); /* dst y1,x1 */
OUT_BATCH((1 << 16) | 1024);
OUT_RELOC_FENCED(batch_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
OUT_BATCH((0 << 16) | 0); /* src x1, y1 */
OUT_BATCH(4096);
OUT_RELOC_FENCED(sample_batch_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
ADVANCE_BATCH();
intel_batchbuffer_flush(batch);
if (i % 100 == 0)
gem_sync(fd, batch_bo->handle);
drm_intel_bo_disable_reuse(batch_bo);
/* launch the newly created batch */
exec(fd, batch_bo->handle);
// leak buffers
//drm_intel_bo_unreference(batch_bo);
igt_progress("gem_cs_prefetch: ", i, count);
}
igt_info("Test suceeded, cleanup up - this might take a while.\n");
drm_intel_bufmgr_destroy(bufmgr);
close(fd);
}
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