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Diffstat (limited to 'tests/gem_pread_after_blit.c')
| -rw-r--r-- | tests/gem_pread_after_blit.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/tests/gem_pread_after_blit.c b/tests/gem_pread_after_blit.c new file mode 100644 index 0000000..5abdb38 --- /dev/null +++ b/tests/gem_pread_after_blit.c @@ -0,0 +1,176 @@ +/* + * Copyright © 2009 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: + * Eric Anholt <eric@anholt.net> + * + */ + +/** @file gem_pread_after_blit.c + * + * This is a test of pread's behavior when getting values out of just-drawn-to + * buffers. + * + * The goal is to catch failure in the whole-buffer-flush or + * ranged-buffer-flush paths in the kernel. + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> +#include <fcntl.h> +#include <inttypes.h> +#include <errno.h> +#include <sys/stat.h> +#include <sys/time.h> +#include "drm.h" +#include "i915_drm.h" +#include "drmtest.h" +#include "intel_bufmgr.h" +#include "intel_batchbuffer.h" +#include "intel_gpu_tools.h" + +static drm_intel_bufmgr *bufmgr; +struct intel_batchbuffer *batch; +static const int width = 512, height = 512; +static const int size = 1024 * 1024; + +#define PAGE_SIZE 4096 + +static drm_intel_bo * +create_bo(uint32_t val) +{ + drm_intel_bo *bo; + uint32_t *vaddr; + int i; + + bo = drm_intel_bo_alloc(bufmgr, "src bo", size, 4096); + + /* Fill the BO with dwords starting at start_val */ + drm_intel_bo_map(bo, 1); + vaddr = bo->virtual; + + for (i = 0; i < 1024 * 1024 / 4; i++) + vaddr[i] = val++; + + drm_intel_bo_unmap(bo); + + return bo; +} + +static void +verify_large_read(drm_intel_bo *bo, uint32_t val) +{ + uint32_t buf[size / 4]; + int i; + + drm_intel_bo_get_subdata(bo, 0, size, buf); + + for (i = 0; i < size / 4; i++) { + if (buf[i] != val) { + fprintf(stderr, + "Unexpected value 0x%08x instead of " + "0x%08x at offset 0x%08x (%p)\n", + buf[i], val, i * 4, buf); + abort(); + } + val++; + } +} + +/** This reads at the size that Mesa usees for software fallbacks. */ +static void +verify_small_read(drm_intel_bo *bo, uint32_t val) +{ + uint32_t buf[4096 / 4]; + int offset, i; + + for (i = 0; i < 4096 / 4; i++) + buf[i] = 0x00c0ffee; + + for (offset = 0; offset < size; offset += PAGE_SIZE) { + drm_intel_bo_get_subdata(bo, offset, PAGE_SIZE, buf); + + for (i = 0; i < PAGE_SIZE; i += 4) { + if (buf[i / 4] != val) { + fprintf(stderr, + "Unexpected value 0x%08x instead of " + "0x%08x at offset 0x%08x\n", + buf[i / 4], val, i * 4); + abort(); + } + val++; + } + } +} + +int +main(int argc, char **argv) +{ + int fd; + drm_intel_bo *src1, *src2, *bo; + uint32_t start1 = 0; + uint32_t start2 = 1024 * 1024 / 4; + + fd = drm_open_any(); + intel_get_drm_devid(fd); + + bufmgr = drm_intel_bufmgr_gem_init(fd, 4096); + drm_intel_bufmgr_gem_enable_reuse(bufmgr); + batch = intel_batchbuffer_alloc(bufmgr); + + src1 = create_bo(start1); + src2 = create_bo(start2); + + bo = drm_intel_bo_alloc(bufmgr, "dst bo", size, 4096); + + /* First, do a full-buffer read after blitting */ + printf("Large read after blit 1\n"); + intel_copy_bo(batch, bo, src1, width, height); + verify_large_read(bo, start1); + printf("Large read after blit 2\n"); + intel_copy_bo(batch, bo, src2, width, height); + verify_large_read(bo, start2); + + printf("Small reads after blit 1\n"); + intel_copy_bo(batch, bo, src1, width, height); + verify_small_read(bo, start1); + printf("Small reads after blit 2\n"); + intel_copy_bo(batch, bo, src2, width, height); + verify_small_read(bo, start2); + + printf("Large read after blit 3\n"); + intel_copy_bo(batch, bo, src1, width, height); + verify_large_read(bo, start1); + + drm_intel_bo_unreference(src1); + drm_intel_bo_unreference(src2); + drm_intel_bo_unreference(bo); + + intel_batchbuffer_free(batch); + drm_intel_bufmgr_destroy(bufmgr); + + close(fd); + + return 0; +} |