1 /*
2 * Copyright © 2011,2012 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Chris Wilson <[email protected]>
25 * Daniel Vetter <[email protected]>
26 *
27 */
28
29 /*
30 * Testcase: run a nop batch which is really big
31 *
32 * Mostly useful to stress-test the error-capture code
33 */
34
35 #include "igt.h"
36 #include <unistd.h>
37 #include <stdlib.h>
38 #include <stdint.h>
39 #include <stdio.h>
40 #include <string.h>
41 #include <fcntl.h>
42 #include <inttypes.h>
43 #include <errno.h>
44 #include <sys/stat.h>
45 #include <sys/ioctl.h>
46 #include <sys/time.h>
47 #include "drm.h"
48
49 IGT_TEST_DESCRIPTION("Run a large nop batch to stress test the error capture"
50 " code.");
51
52 #define FORCE_PREAD_PWRITE 0
53
54 static int use_64bit_relocs;
55
exec1(int fd,uint32_t handle,uint64_t reloc_ofs,unsigned flags,char * ptr)56 static void exec1(int fd, uint32_t handle, uint64_t reloc_ofs, unsigned flags, char *ptr)
57 {
58 struct drm_i915_gem_execbuffer2 execbuf;
59 struct drm_i915_gem_exec_object2 gem_exec[1];
60 struct drm_i915_gem_relocation_entry gem_reloc[1];
61
62 gem_reloc[0].offset = reloc_ofs;
63 gem_reloc[0].delta = 0;
64 gem_reloc[0].target_handle = handle;
65 gem_reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
66 gem_reloc[0].write_domain = 0;
67 gem_reloc[0].presumed_offset = 0;
68
69 gem_exec[0].handle = handle;
70 gem_exec[0].relocation_count = 1;
71 gem_exec[0].relocs_ptr = to_user_pointer(gem_reloc);
72 gem_exec[0].alignment = 0;
73 gem_exec[0].offset = 0;
74 gem_exec[0].flags = EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
75 gem_exec[0].rsvd1 = 0;
76 gem_exec[0].rsvd2 = 0;
77
78 execbuf.buffers_ptr = to_user_pointer(gem_exec);
79 execbuf.buffer_count = 1;
80 execbuf.batch_start_offset = 0;
81 execbuf.batch_len = 8;
82 execbuf.cliprects_ptr = 0;
83 execbuf.num_cliprects = 0;
84 execbuf.DR1 = 0;
85 execbuf.DR4 = 0;
86 execbuf.flags = flags;
87 i915_execbuffer2_set_context_id(execbuf, 0);
88 execbuf.rsvd2 = 0;
89
90 /* Avoid hitting slowpaths in the reloc processing which might yield a
91 * presumed_offset of -1. Happens when the batch is still busy from the
92 * last round. */
93 gem_sync(fd, handle);
94
95 gem_execbuf(fd, &execbuf);
96
97 igt_warn_on(gem_reloc[0].presumed_offset == -1);
98
99 if (use_64bit_relocs) {
100 uint64_t tmp;
101 if (ptr)
102 tmp = *(uint64_t *)(ptr+reloc_ofs);
103 else
104 gem_read(fd, handle, reloc_ofs, &tmp, sizeof(tmp));
105 igt_assert_eq(tmp, gem_reloc[0].presumed_offset);
106 } else {
107 uint32_t tmp;
108 if (ptr)
109 tmp = *(uint32_t *)(ptr+reloc_ofs);
110 else
111 gem_read(fd, handle, reloc_ofs, &tmp, sizeof(tmp));
112 igt_assert_eq(tmp, gem_reloc[0].presumed_offset);
113 }
114 }
115
xchg_reloc(void * array,unsigned i,unsigned j)116 static void xchg_reloc(void *array, unsigned i, unsigned j)
117 {
118 struct drm_i915_gem_relocation_entry *reloc = array;
119 struct drm_i915_gem_relocation_entry *a = &reloc[i];
120 struct drm_i915_gem_relocation_entry *b = &reloc[j];
121 struct drm_i915_gem_relocation_entry tmp;
122
123 tmp = *a;
124 *a = *b;
125 *b = tmp;
126 }
127
execN(int fd,uint32_t handle,uint64_t batch_size,unsigned flags,char * ptr)128 static void execN(int fd, uint32_t handle, uint64_t batch_size, unsigned flags, char *ptr)
129 {
130 #define reloc_ofs(N, T) ((((N)+1) << 12) - 4*(1 + ((N) == ((T)-1))))
131 struct drm_i915_gem_execbuffer2 execbuf;
132 struct drm_i915_gem_exec_object2 gem_exec[1];
133 struct drm_i915_gem_relocation_entry *gem_reloc;
134 uint64_t n, nreloc = batch_size >> 12;
135
136 gem_reloc = calloc(nreloc, sizeof(*gem_reloc));
137 igt_assert(gem_reloc);
138
139 for (n = 0; n < nreloc; n++) {
140 gem_reloc[n].offset = reloc_ofs(n, nreloc);
141 gem_reloc[n].target_handle = handle;
142 gem_reloc[n].read_domains = I915_GEM_DOMAIN_RENDER;
143 gem_reloc[n].presumed_offset = n ^ 0xbeefdeaddeadbeef;
144 if (ptr) {
145 if (use_64bit_relocs)
146 *(uint64_t *)(ptr + gem_reloc[n].offset) = gem_reloc[n].presumed_offset;
147 else
148 *(uint32_t *)(ptr + gem_reloc[n].offset) = gem_reloc[n].presumed_offset;
149 } else
150 gem_write(fd, handle, gem_reloc[n].offset, &gem_reloc[n].presumed_offset, 4*(1+use_64bit_relocs));
151 }
152
153 memset(gem_exec, 0, sizeof(gem_exec));
154 gem_exec[0].handle = handle;
155 gem_exec[0].relocation_count = nreloc;
156 gem_exec[0].relocs_ptr = to_user_pointer(gem_reloc);
157 gem_exec[0].flags = EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
158
159 memset(&execbuf, 0, sizeof(execbuf));
160 execbuf.buffers_ptr = to_user_pointer(gem_exec);
161 execbuf.buffer_count = 1;
162 execbuf.flags = flags;
163
164 /* Avoid hitting slowpaths in the reloc processing which might yield a
165 * presumed_offset of -1. Happens when the batch is still busy from the
166 * last round. */
167 gem_sync(fd, handle);
168
169 igt_permute_array(gem_reloc, nreloc, xchg_reloc);
170
171 gem_execbuf(fd, &execbuf);
172 for (n = 0; n < nreloc; n++) {
173 if (igt_warn_on(gem_reloc[n].presumed_offset == -1))
174 break;
175 }
176
177 if (use_64bit_relocs) {
178 for (n = 0; n < nreloc; n++) {
179 uint64_t tmp;
180 if (ptr)
181 tmp = *(uint64_t *)(ptr+reloc_ofs(n, nreloc));
182 else
183 gem_read(fd, handle, reloc_ofs(n, nreloc), &tmp, sizeof(tmp));
184 igt_assert_eq(tmp, gem_reloc[n].presumed_offset);
185 }
186 } else {
187 for (n = 0; n < nreloc; n++) {
188 uint32_t tmp;
189 if (ptr)
190 tmp = *(uint32_t *)(ptr+reloc_ofs(n, nreloc));
191 else
192 gem_read(fd, handle, reloc_ofs(n, nreloc), &tmp, sizeof(tmp));
193 igt_assert_eq(tmp, gem_reloc[n].presumed_offset);
194 }
195 }
196
197 free(gem_reloc);
198 #undef reloc_ofs
199 }
200
exhaustive(int fd)201 static void exhaustive(int fd)
202 {
203 uint32_t batch[2] = {MI_BATCH_BUFFER_END};
204 uint64_t batch_size, max, ggtt_max, reloc_ofs;
205
206 max = 3 * gem_aperture_size(fd) / 4;
207 ggtt_max = 3 * gem_global_aperture_size(fd) / 4;
208 intel_require_memory(1, max, CHECK_RAM);
209
210 for (batch_size = 4096; batch_size <= max; ) {
211 uint32_t handle;
212 void *ptr;
213
214 handle = gem_create(fd, batch_size);
215 gem_write(fd, handle, 0, batch, sizeof(batch));
216
217 if (!FORCE_PREAD_PWRITE && gem_has_llc(fd))
218 ptr = __gem_mmap__cpu(fd, handle, 0, batch_size, PROT_READ);
219 else if (!FORCE_PREAD_PWRITE && gem_mmap__has_wc(fd))
220 ptr = __gem_mmap__wc(fd, handle, 0, batch_size, PROT_READ);
221 else
222 ptr = NULL;
223
224 igt_debug("Forwards (%lld)\n", (long long)batch_size);
225 for (reloc_ofs = 4096; reloc_ofs < batch_size; reloc_ofs += 4096) {
226 igt_debug("batch_size %llu, reloc_ofs %llu\n",
227 (long long)batch_size, (long long)reloc_ofs);
228 exec1(fd, handle, reloc_ofs, 0, ptr);
229 if (batch_size < ggtt_max)
230 exec1(fd, handle, reloc_ofs, I915_EXEC_SECURE, ptr);
231 }
232
233 igt_debug("Backwards (%lld)\n", (long long)batch_size);
234 for (reloc_ofs = batch_size - 4096; reloc_ofs; reloc_ofs -= 4096) {
235 igt_debug("batch_size %llu, reloc_ofs %llu\n",
236 (long long)batch_size, (long long)reloc_ofs);
237 exec1(fd, handle, reloc_ofs, 0, ptr);
238 if (batch_size < ggtt_max)
239 exec1(fd, handle, reloc_ofs, I915_EXEC_SECURE, ptr);
240 }
241
242 igt_debug("Random (%lld)\n", (long long)batch_size);
243 execN(fd, handle, batch_size, 0, ptr);
244 if (batch_size < ggtt_max)
245 execN(fd, handle, batch_size, I915_EXEC_SECURE, ptr);
246
247 if (ptr)
248 munmap(ptr, batch_size);
249 gem_madvise(fd, handle, I915_MADV_DONTNEED);
250
251 if (batch_size < max && 2*batch_size > max)
252 batch_size = max;
253 else
254 batch_size *= 2;
255 }
256 }
257
single(int i915)258 static void single(int i915)
259 {
260 const uint32_t bbe = MI_BATCH_BUFFER_END;
261 uint64_t batch_size, limit;
262 uint32_t handle;
263 void *ptr;
264
265 batch_size = (intel_get_avail_ram_mb() / 2) << 20; /* XXX CI slack? */
266 limit = gem_aperture_size(i915) - (256 << 10); /* low pages reserved */
267 if (!gem_uses_full_ppgtt(i915))
268 limit = 3 * limit / 4;
269
270 batch_size = min(batch_size, limit);
271 batch_size = ALIGN(batch_size, 4096);
272 igt_info("Submitting a %'"PRId64"MiB batch, %saperture size %'"PRId64"MiB\n",
273 batch_size >> 20,
274 gem_uses_full_ppgtt(i915) ? "" : "shared ",
275 gem_aperture_size(i915) >> 20);
276 intel_require_memory(1, batch_size, CHECK_RAM);
277
278 handle = gem_create(i915, batch_size);
279 gem_write(i915, handle, 0, &bbe, sizeof(bbe));
280
281 if (!FORCE_PREAD_PWRITE && gem_has_llc(i915))
282 ptr = __gem_mmap__cpu(i915, handle, 0, batch_size, PROT_READ);
283 else if (!FORCE_PREAD_PWRITE && gem_mmap__has_wc(i915))
284 ptr = __gem_mmap__wc(i915, handle, 0, batch_size, PROT_READ);
285 else
286 ptr = NULL;
287
288 execN(i915, handle, batch_size, 0, ptr);
289
290 if (ptr)
291 munmap(ptr, batch_size);
292 }
293
294 igt_main
295 {
296 int i915 = -1;
297
298 igt_fixture {
299 i915 = drm_open_driver(DRIVER_INTEL);
300 igt_require_gem(i915);
301
302 use_64bit_relocs = intel_gen(intel_get_drm_devid(i915)) >= 8;
303 }
304
305 igt_subtest("single")
306 single(i915);
307
308 igt_subtest("exhaustive")
309 exhaustive(i915);
310
311 igt_fixture
312 close(i915);
313 }
314