tests/drv_hangman.c

   1 /*
   2  * Copyright © 2014 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  *    Mika Kuoppala <mika.kuoppala@intel.com>
  25  *    Oscar Mateo <oscar.mateo@intel.com>
  26  *
  27  */
  28
  29 #include <limits.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <fcntl.h>
  33
  34 #include "intel_chipset.h"
  35 #include "drmtest.h"
  36 #include "igt_debugfs.h"
  37 #include "ioctl_wrappers.h"
  38
  39 static int _read_sysfs(void *dst, int maxlen,
  40                       const char* path,
  41                       const char *fname)
  42 {
  43         int fd;
  44         char full[PATH_MAX];
  45         int r, e;
  46
  47         igt_assert(snprintf(full, PATH_MAX, "%s/%s", path, fname) < PATH_MAX);
  48
  49         fd = open(full, O_RDONLY);
  50         if (fd == -1)
  51                 return -errno;
  52
  53         r = read(fd, dst, maxlen);
  54         e = errno;
  55         close(fd);
  56
  57         if (r < 0)
  58                 return -e;
  59
  60         return r;
  61 }
  62
  63 static int read_sysfs(void *dst, int maxlen, const char *fname)
  64 {
  65         char path[PATH_MAX];
  66
  67         igt_assert(snprintf(path, PATH_MAX, "/sys/class/drm/card%d",
  68                             drm_get_card()) < PATH_MAX);
  69
  70         return _read_sysfs(dst, maxlen, path, fname);
  71 }
  72
  73 static void test_sysfs_error_exists(void)
  74 {
  75         char tmp[1024];
  76
  77         igt_assert(read_sysfs(tmp, sizeof(tmp), "error") > 0);
  78 }
  79
  80 static void test_debugfs_error_state_exists(void)
  81 {
  82         int fd;
  83
  84         igt_assert((fd = igt_debugfs_open("i915_error_state", O_RDONLY)) >= 0);
  85
  86         close (fd);
  87 }
  88
  89 static void test_debugfs_ring_stop_exists(void)
  90 {
  91         int fd;
  92
  93         igt_assert((fd = igt_debugfs_open("i915_ring_stop", O_RDONLY)) >= 0);
  94
  95         close(fd);
  96 }
  97
  98 static void read_dfs(const char *fname, char *d, int maxlen)
  99 {
 100         int fd;
 101         int l;
 102
 103         igt_assert((fd = igt_debugfs_open(fname, O_RDONLY)) >= 0);
 104
 105         igt_assert((l = read(fd, d, maxlen-1)) > 0);
 106         igt_assert(l < maxlen);
 107         d[l] = 0;
 108         close(fd);
 109
 110         igt_debug("dfs entry %s read '%s'\n", fname, d);
 111 }
 112
 113 static void _assert_dfs_entry(const char *fname, const char *s, bool inverse)
 114 {
 115         char tmp[1024];
 116         const int l = strlen(s) < sizeof(tmp) ?
 117                 strlen(s) : sizeof(tmp);
 118
 119         read_dfs(fname, tmp, l + 1);
 120         if (!inverse) {
 121                 igt_fail_on_f(strncmp(tmp, s, l) != 0,
 122                               "contents of %s: '%s' (expected '%s')\n", fname, tmp, s);
 123         } else {
 124                 igt_fail_on_f(strncmp(tmp, s, l) == 0,
 125                               "contents of %s: '%s' (expected not '%s'\n", fname, tmp, s);
 126         }
 127 }
 128
 129 static void assert_dfs_entry(const char *fname, const char *s)
 130 {
 131         _assert_dfs_entry(fname, s, false);
 132 }
 133
 134 static void assert_dfs_entry_not(const char *fname, const char *s)
 135 {
 136         _assert_dfs_entry(fname, s, true);
 137 }
 138
 139 static void assert_error_state_clear(void)
 140 {
 141         assert_dfs_entry("i915_error_state", "no error state collected");
 142 }
 143
 144 static void assert_error_state_collected(void)
 145 {
 146         assert_dfs_entry_not("i915_error_state", "no error state collected");
 147 }
 148
 149 static int get_line_count(const char *s)
 150 {
 151         int count = 0;
 152
 153         while (*s) {
 154                 if (*s == '\n')
 155                         count++;
 156                 s++;
 157         }
 158
 159         return count;
 160 }
 161
 162 static void check_other_clients(void)
 163 {
 164         char tmp[1024];
 165         char *s;
 166         int dev, pid, uid, magic;
 167
 168         read_dfs("clients", tmp, sizeof(tmp));
 169         if (get_line_count(tmp) <= 2)
 170                 return;
 171
 172         s = strstr(tmp, "y");
 173         igt_assert(s != NULL);
 174         igt_assert(sscanf(s, "y %d %d %d %d",
 175                           &dev, &pid, &uid, &magic) == 4);
 176
 177         igt_debug("client %d %d %d %d\n", dev, pid, uid, magic);
 178         igt_assert(pid == getpid());
 179         igt_debug("found myself in client list\n");
 180 }
 181
 182 #define MAGIC_NUMBER 0x10001
 183 const uint32_t batch[] = { MI_NOOP,
 184                            MI_BATCH_BUFFER_END,
 185                            MAGIC_NUMBER,
 186                            MAGIC_NUMBER };
 187
 188 static uint64_t submit_batch(int fd, unsigned ring_id, bool stop_ring)
 189 {
 190         struct drm_i915_gem_execbuffer2 execbuf;
 191         struct drm_i915_gem_exec_object2 exec;
 192         uint64_t presumed_offset;
 193
 194         gem_require_ring(fd, ring_id);
 195
 196         exec.handle = gem_create(fd, 4096);
 197         gem_write(fd, exec.handle, 0, batch, sizeof(batch));
 198         exec.relocation_count = 0;
 199         exec.relocs_ptr = 0;
 200         exec.alignment = 0;
 201         exec.offset = 0;
 202         exec.flags = 0;
 203         exec.rsvd1 = 0;
 204         exec.rsvd2 = 0;
 205
 206         execbuf.buffers_ptr = (uintptr_t)&exec;
 207         execbuf.buffer_count = 1;
 208         execbuf.batch_start_offset = 0;
 209         execbuf.batch_len = sizeof(batch);
 210         execbuf.cliprects_ptr = 0;
 211         execbuf.num_cliprects = 0;
 212         execbuf.DR1 = 0;
 213         execbuf.DR4 = 0;
 214         execbuf.flags = ring_id;
 215         i915_execbuffer2_set_context_id(execbuf, 0);
 216         execbuf.rsvd2 = 0;
 217
 218         gem_execbuf(fd, &execbuf);
 219         gem_sync(fd, exec.handle);
 220         presumed_offset = exec.offset;
 221
 222         if (stop_ring) {
 223                 igt_set_stop_rings(igt_to_stop_ring_flag(ring_id));
 224
 225                 gem_execbuf(fd, &execbuf);
 226                 gem_sync(fd, exec.handle);
 227
 228                 igt_assert(igt_get_stop_rings() == STOP_RING_NONE);
 229                 igt_assert(presumed_offset == exec.offset);
 230         }
 231
 232         gem_close(fd, exec.handle);
 233
 234         return exec.offset;
 235 }
 236
 237 static void clear_error_state(void)
 238 {
 239         int fd;
 240         const char *b = "1";
 241
 242         igt_assert((fd = igt_debugfs_open("i915_error_state", O_WRONLY)) >= 0);
 243         igt_assert(write(fd, b, 1) == 1);
 244         close(fd);
 245 }
 246
 247 static void test_error_state_basic(void)
 248 {
 249         int fd;
 250
 251         check_other_clients();
 252         clear_error_state();
 253         assert_error_state_clear();
 254
 255         fd = drm_open_any();
 256         submit_batch(fd, I915_EXEC_RENDER, true);
 257         close(fd);
 258
 259         assert_error_state_collected();
 260         clear_error_state();
 261         assert_error_state_clear();
 262 }
 263
 264 static void check_error_state(const int gen,
 265                               const char *expected_ring_name,
 266                               uint64_t expected_offset)
 267 {
 268         FILE *file;
 269         int debug_fd;
 270         char *line = NULL;
 271         size_t line_size = 0;
 272         char *ring_name = NULL;
 273         bool bb_ok = false, req_ok = false, ringbuf_ok = false;
 274
 275         debug_fd = igt_debugfs_open("i915_error_state", O_RDONLY);
 276         igt_assert(debug_fd >= 0);
 277         file = fdopen(debug_fd, "r");
 278
 279         while (getline(&line, &line_size, file) > 0) {
 280                 char *dashes = NULL;
 281                 int bb_matched = 0;
 282                 uint32_t gtt_offset;
 283                 int req_matched = 0;
 284                 int requests;
 285                 uint32_t tail;
 286                 int ringbuf_matched = 0;
 287                 int i, items;
 288
 289                 dashes = strstr(line, "---");
 290                 if (!dashes)
 291                         continue;
 292
 293                 ring_name = realloc(ring_name, dashes - line);
 294                 strncpy(ring_name, line, dashes - line);
 295                 ring_name[dashes - line - 1] = '\0';
 296
 297                 bb_matched = sscanf(dashes, "--- gtt_offset = 0x%08x\n",
 298                                     &gtt_offset);
 299                 if (bb_matched == 1) {
 300                         char expected_line[32];
 301
 302                         igt_assert(strstr(ring_name, expected_ring_name));
 303                         igt_assert(gtt_offset == expected_offset);
 304
 305                         for (i = 0; i < sizeof(batch) / 4; i++) {
 306                                 igt_assert(getline(&line, &line_size, file) > 0);
 307                                 snprintf(expected_line, sizeof(expected_line), "%08x :  %08x",
 308                                          4*i, batch[i]);
 309                                 igt_assert(strstr(line, expected_line));
 310                         }
 311                         bb_ok = true;
 312                         continue;
 313                 }
 314
 315                 req_matched = sscanf(dashes, "--- %d requests\n", &requests);
 316                 if (req_matched == 1) {
 317                         igt_assert(strstr(ring_name, expected_ring_name));
 318                         igt_assert(requests > 0);
 319
 320                         for (i = 0; i < requests; i++) {
 321                                 uint32_t seqno;
 322                                 long jiffies;
 323
 324                                 igt_assert(getline(&line, &line_size, file) > 0);
 325                                 items = sscanf(line, "  seqno 0x%08x, emitted %ld, tail 0x%08x\n",
 326                                                &seqno, &jiffies, &tail);
 327                                 igt_assert(items == 3);
 328                         }
 329                         req_ok = true;
 330                         continue;
 331                 }
 332
 333                 ringbuf_matched = sscanf(dashes, "--- ringbuffer = 0x%08x\n",
 334                                          &gtt_offset);
 335                 if (ringbuf_matched == 1) {
 336                         unsigned int offset, command, expected_addr = 0;
 337
 338                         if (!strstr(ring_name, expected_ring_name))
 339                                 continue;
 340                         igt_assert(req_ok);
 341
 342                         for (i = 0; i < tail / 4; i++) {
 343                                 igt_assert(getline(&line, &line_size, file) > 0);
 344                                 items = sscanf(line, "%08x :  %08x\n",
 345                                                &offset, &command);
 346                                 igt_assert(items == 2);
 347                                 if ((command & 0x1F800000) == MI_BATCH_BUFFER_START) {
 348                                         igt_assert(getline(&line, &line_size, file) > 0);
 349                                         items = sscanf(line, "%08x :  %08x\n",
 350                                                        &offset, &expected_addr);
 351                                         igt_assert(items == 2);
 352                                         i++;
 353                                 }
 354                         }
 355                         if (gen >= 4)
 356                                 igt_assert(expected_addr == expected_offset);
 357                         else
 358                                 igt_assert((expected_addr & ~0x1) == expected_offset);
 359                         ringbuf_ok = true;
 360                         continue;
 361                 }
 362
 363                 if (bb_ok && req_ok && ringbuf_ok)
 364                         break;
 365         }
 366         igt_assert(bb_ok && req_ok && ringbuf_ok);
 367
 368         free(line);
 369         free(ring_name);
 370         close(debug_fd);
 371 }
 372
 373 static void test_error_state_capture(unsigned ring_id,
 374                                      const char *ring_name)
 375 {
 376         int fd, gen;
 377         uint64_t offset;
 378
 379         check_other_clients();
 380         clear_error_state();
 381
 382         fd = drm_open_any();
 383         gen = intel_gen(intel_get_drm_devid(fd));
 384
 385         offset = submit_batch(fd, ring_id, true);
 386         close(fd);
 387
 388         check_error_state(gen, ring_name, offset);
 389 }
 390
 391 static const struct target_ring {
 392         const int id;
 393         const char *short_name;
 394         const char *full_name;
 395 } rings[] = {
 396         { I915_EXEC_RENDER, "render", "render ring" },
 397         { I915_EXEC_BSD, "bsd", "bsd ring" },
 398         { I915_EXEC_BLT, "blt", "blitter ring" },
 399         { I915_EXEC_VEBOX, "vebox", "video enhancement ring" },
 400 };
 401
 402 igt_main
 403 {
 404         igt_skip_on_simulation();
 405
 406         igt_subtest("error-state-debugfs-entry")
 407                 test_debugfs_error_state_exists();
 408
 409         igt_subtest("error-state-sysfs-entry")
 410                 test_sysfs_error_exists();
 411
 412         igt_subtest("ring-stop-sysfs-entry")
 413                 test_debugfs_ring_stop_exists();
 414
 415         igt_subtest("error-state-basic")
 416                 test_error_state_basic();
 417
 418         for (int i = 0; i < sizeof(rings)/sizeof(rings[0]); i++) {
 419                 igt_subtest_f("error-state-capture-%s", rings[i].short_name)
 420                         test_error_state_capture(rings[i].id, rings[i].full_name);
 421         }
 422 }