2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Daniel Vetter <daniel.vetter@ffwll.ch>
39 #include "ioctl_wrappers.h"
41 #include "intel_chipset.h"
46 * Testcase: pwrite/pread consistency when touching partial cachelines
48 * Some fancy new pwrite/pread optimizations clflush in-line while
49 * reading/writing. Check whether all required clflushes happen.
53 static drm_intel_bufmgr *bufmgr;
54 struct intel_batchbuffer *batch;
56 drm_intel_bo *scratch_bo;
57 drm_intel_bo *staging_bo;
58 #define BO_SIZE (4*4096)
60 uint64_t mappable_gtt_limit;
64 copy_bo(drm_intel_bo *src, drm_intel_bo *dst)
66 BLIT_COPY_BATCH_START(devid, 0);
67 OUT_BATCH((3 << 24) | /* 32 bits */
68 (0xcc << 16) | /* copy ROP */
70 OUT_BATCH(0 << 16 | 0);
71 OUT_BATCH((BO_SIZE/4096) << 16 | 1024);
72 OUT_RELOC_FENCED(dst, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
73 OUT_BATCH(0 << 16 | 0);
75 OUT_RELOC_FENCED(src, I915_GEM_DOMAIN_RENDER, 0, 0);
78 intel_batchbuffer_flush(batch);
82 blt_bo_fill(drm_intel_bo *tmp_bo, drm_intel_bo *bo, int val)
87 drm_intel_gem_bo_map_gtt(tmp_bo);
88 gtt_ptr = tmp_bo->virtual;
90 for (i = 0; i < BO_SIZE; i++)
93 drm_intel_gem_bo_unmap_gtt(tmp_bo);
95 if (bo->offset < mappable_gtt_limit &&
96 (IS_G33(devid) || intel_gen(devid) >= 4))
102 #define MAX_BLT_SIZE 128
104 uint8_t tmp[BO_SIZE];
106 static void test_partial_reads(void)
110 igt_info("checking partial reads\n");
111 for (i = 0; i < ROUNDS; i++) {
115 blt_bo_fill(staging_bo, scratch_bo, i);
117 start = random() % BO_SIZE;
118 len = random() % (BO_SIZE-start) + 1;
120 drm_intel_bo_get_subdata(scratch_bo, start, len, tmp);
121 for (j = 0; j < len; j++) {
122 igt_assert_f(tmp[j] == val,
123 "mismatch at %i, got: %i, expected: %i\n",
127 igt_progress("partial reads test: ", i, ROUNDS);
132 static void test_partial_writes(void)
137 igt_info("checking partial writes\n");
138 for (i = 0; i < ROUNDS; i++) {
142 blt_bo_fill(staging_bo, scratch_bo, i);
144 start = random() % BO_SIZE;
145 len = random() % (BO_SIZE-start) + 1;
147 memset(tmp, i + 63, BO_SIZE);
149 drm_intel_bo_subdata(scratch_bo, start, len, tmp);
151 copy_bo(scratch_bo, staging_bo);
152 drm_intel_gem_bo_map_gtt(staging_bo);
153 gtt_ptr = staging_bo->virtual;
155 for (j = 0; j < start; j++) {
156 igt_assert_f(gtt_ptr[j] == val,
157 "mismatch at %i, got: %i, expected: %i\n",
160 for (; j < start + len; j++) {
161 igt_assert_f(gtt_ptr[j] == tmp[0],
162 "mismatch at %i, got: %i, expected: %i\n",
165 for (; j < BO_SIZE; j++) {
166 igt_assert_f(gtt_ptr[j] == val,
167 "mismatch at %i, got: %i, expected: %i\n",
170 drm_intel_gem_bo_unmap_gtt(staging_bo);
172 igt_progress("partial writes test: ", i, ROUNDS);
177 static void test_partial_read_writes(void)
182 igt_info("checking partial writes after partial reads\n");
183 for (i = 0; i < ROUNDS; i++) {
187 blt_bo_fill(staging_bo, scratch_bo, i);
190 start = random() % BO_SIZE;
191 len = random() % (BO_SIZE-start) + 1;
193 drm_intel_bo_get_subdata(scratch_bo, start, len, tmp);
194 for (j = 0; j < len; j++) {
195 igt_assert_f(tmp[j] == val,
196 "mismatch in read at %i, got: %i, expected: %i\n",
200 /* Change contents through gtt to make the pread cachelines
202 val = (i + 17) % 256;
203 blt_bo_fill(staging_bo, scratch_bo, val);
206 start = random() % BO_SIZE;
207 len = random() % (BO_SIZE-start) + 1;
209 memset(tmp, i + 63, BO_SIZE);
211 drm_intel_bo_subdata(scratch_bo, start, len, tmp);
213 copy_bo(scratch_bo, staging_bo);
214 drm_intel_gem_bo_map_gtt(staging_bo);
215 gtt_ptr = staging_bo->virtual;
217 for (j = 0; j < start; j++) {
218 igt_assert_f(gtt_ptr[j] == val,
219 "mismatch at %i, got: %i, expected: %i\n",
222 for (; j < start + len; j++) {
223 igt_assert_f(gtt_ptr[j] == tmp[0],
224 "mismatch at %i, got: %i, expected: %i\n",
227 for (; j < BO_SIZE; j++) {
228 igt_assert_f(gtt_ptr[j] == val,
229 "mismatch at %i, got: %i, expected: %i\n",
232 drm_intel_gem_bo_unmap_gtt(staging_bo);
234 igt_progress("partial read/writes test: ", i, ROUNDS);
238 static void do_tests(int cache_level, const char *suffix)
241 if (cache_level != -1)
242 gem_set_caching(fd, scratch_bo->handle, cache_level);
245 igt_subtest_f("reads%s", suffix)
246 test_partial_reads();
248 igt_subtest_f("write%s", suffix)
249 test_partial_writes();
251 igt_subtest_f("writes-after-reads%s", suffix)
252 test_partial_read_writes();
259 igt_skip_on_simulation();
264 bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
265 //drm_intel_bufmgr_gem_enable_reuse(bufmgr);
266 devid = intel_get_drm_devid(fd);
267 batch = intel_batchbuffer_alloc(bufmgr, devid);
269 /* overallocate the buffers we're actually using because */
270 scratch_bo = drm_intel_bo_alloc(bufmgr, "scratch bo", BO_SIZE, 4096);
271 staging_bo = drm_intel_bo_alloc(bufmgr, "staging bo", BO_SIZE, 4096);
273 igt_init_aperture_trashers(bufmgr);
274 mappable_gtt_limit = gem_mappable_aperture_size();
279 /* Repeat the tests using different levels of snooping */
280 do_tests(0, "-uncached");
281 do_tests(1, "-snoop");
282 do_tests(2, "-display");
285 igt_cleanup_aperture_trashers();
286 drm_intel_bufmgr_destroy(bufmgr);