2 * Copyright © 2012 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 * Ben Widawsky <ben@bwidawsk.net>
25 * Jeff McGee <jeff.mcgee@intel.com>
38 #include "intel_gpu_tools.h"
39 #include "intel_bufmgr.h"
40 #include "intel_batchbuffer.h"
41 #include "igt_debugfs.h"
45 static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz";
56 static int origfreqs[NUMFREQ];
63 { "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL }
66 static igt_debugfs_t dfs;
68 static int readval(FILE *filp)
74 scanned = fscanf(filp, "%d", &val);
75 igt_assert(scanned == 1);
80 static void read_freqs(int *freqs)
84 for (i = 0; i < NUMFREQ; i++)
85 freqs[i] = readval(stuff[i].filp);
88 static int do_writeval(FILE *filp, int val, int lerrno)
94 ret = fprintf(filp, "%d", val);
97 /* Expecting specific error */
98 igt_assert(ret == EOF && errno == lerrno);
99 igt_assert(readval(filp) == orig);
101 /* Expecting no error */
102 igt_assert(ret != EOF);
103 igt_assert(readval(filp) == val);
108 #define writeval(filp, val) do_writeval(filp, val, 0)
109 #define writeval_inval(filp, val) do_writeval(filp, val, EINVAL)
111 static void checkit(const int *freqs)
113 igt_assert(freqs[MIN] <= freqs[MAX]);
114 igt_assert(freqs[CUR] <= freqs[MAX]);
115 igt_assert(freqs[MIN] <= freqs[CUR]);
116 igt_assert(freqs[RPn] <= freqs[MIN]);
117 igt_assert(freqs[MAX] <= freqs[RP0]);
118 igt_assert(freqs[RP1] <= freqs[RP0]);
119 igt_assert(freqs[RPn] <= freqs[RP1]);
120 igt_assert(freqs[RP0] != 0);
121 igt_assert(freqs[RP1] != 0);
124 static void matchit(const int *freqs1, const int *freqs2)
126 igt_assert(freqs1[CUR] == freqs2[CUR]);
127 igt_assert(freqs1[MIN] == freqs2[MIN]);
128 igt_assert(freqs1[MAX] == freqs2[MAX]);
129 igt_assert(freqs1[RP0] == freqs2[RP0]);
130 igt_assert(freqs1[RP1] == freqs2[RP1]);
131 igt_assert(freqs1[RPn] == freqs2[RPn]);
134 static void dump(const int *freqs)
138 igt_debug("gt freq (MHz):");
139 for (i = 0; i < NUMFREQ; i++)
140 igt_debug(" %s=%d", stuff[i].name, freqs[i]);
150 static struct load_helper {
153 drm_intel_bufmgr *bufmgr;
154 struct intel_batchbuffer *batch;
155 drm_intel_bo *target_buffer;
159 struct igt_helper_process igt_proc;
162 static void load_helper_signal_handler(int sig)
165 lh.load = lh.load == LOW ? HIGH : LOW;
170 static void emit_store_dword_imm(uint32_t val)
173 struct intel_batchbuffer *batch = lh.batch;
175 cmd = MI_STORE_DWORD_IMM;
177 cmd |= MI_MEM_VIRTUAL;
179 if (intel_gen(lh.devid) >= 8) {
182 OUT_RELOC(lh.target_buffer, I915_GEM_DOMAIN_INSTRUCTION,
183 I915_GEM_DOMAIN_INSTRUCTION, 0);
190 OUT_BATCH(0); /* reserved */
191 OUT_RELOC(lh.target_buffer, I915_GEM_DOMAIN_INSTRUCTION,
192 I915_GEM_DOMAIN_INSTRUCTION, 0);
198 #define LOAD_HELPER_PAUSE_USEC 500
199 static void load_helper_set_load(enum load load)
201 assert(lh.igt_proc.running);
207 kill(lh.igt_proc.pid, SIGUSR2);
210 static void load_helper_run(enum load load)
213 * FIXME fork helpers won't get cleaned up when started from within a
214 * subtest, so handle the case where it sticks around a bit too long.
216 if (lh.igt_proc.running) {
217 load_helper_set_load(load);
221 igt_require(lh.ready == true);
225 igt_fork_helper(&lh.igt_proc) {
228 signal(SIGUSR1, load_helper_signal_handler);
229 signal(SIGUSR2, load_helper_signal_handler);
232 emit_store_dword_imm(val);
233 intel_batchbuffer_flush_on_ring(lh.batch, 0);
236 /* Lower the load by pausing after every submitted
239 usleep(LOAD_HELPER_PAUSE_USEC);
242 /* Map buffer to stall for write completion */
243 drm_intel_bo_map(lh.target_buffer, 0);
244 drm_intel_bo_unmap(lh.target_buffer);
246 igt_debug("load helper sent %u dword writes\n", val);
250 static void load_helper_stop(void)
252 kill(lh.igt_proc.pid, SIGUSR1);
253 igt_wait_helper(&lh.igt_proc);
256 /* The load helper resource is used by only some subtests. We attempt to
257 * initialize in igt_fixture but do our igt_require check only if a
258 * subtest attempts to run it */
259 static void load_helper_init(void)
261 lh.devid = intel_get_drm_devid(drm_fd);
262 lh.has_ppgtt = gem_uses_aliasing_ppgtt(drm_fd);
264 /* MI_STORE_DATA can only use GTT address on gen4+/g33 and needs
265 * snoopable mem on pre-gen6. */
266 if (intel_gen(lh.devid) < 6) {
267 igt_debug("load helper init failed: pre-gen6 not supported\n");
271 lh.bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
273 igt_debug("load helper init failed: buffer manager init\n");
276 drm_intel_bufmgr_gem_enable_reuse(lh.bufmgr);
278 lh.batch = intel_batchbuffer_alloc(lh.bufmgr, lh.devid);
280 igt_debug("load helper init failed: batch buffer alloc\n");
284 lh.target_buffer = drm_intel_bo_alloc(lh.bufmgr, "target bo",
286 if (!lh.target_buffer) {
287 igt_debug("load helper init failed: target buffer alloc\n");
294 static void load_helper_deinit(void)
296 if (lh.igt_proc.running)
299 if (lh.target_buffer)
300 drm_intel_bo_unreference(lh.target_buffer);
303 intel_batchbuffer_free(lh.batch);
306 drm_intel_bufmgr_destroy(lh.bufmgr);
309 static void stop_rings(void)
312 static const char data[] = "0xf";
314 fd = igt_debugfs_open(&dfs, "i915_ring_stop", O_WRONLY);
317 igt_debug("injecting ring stop\n");
318 igt_assert(write(fd, data, sizeof(data)) == sizeof(data));
323 static bool rings_stopped(void)
326 static char buf[128];
327 unsigned long long val;
329 fd = igt_debugfs_open(&dfs, "i915_ring_stop", O_RDONLY);
332 igt_assert(read(fd, buf, sizeof(buf)) > 0);
335 sscanf(buf, "%llx", &val);
340 static void min_max_config(void (*check)(void))
342 int fmid = (origfreqs[RPn] + origfreqs[RP0]) / 2;
344 /* hw (and so kernel) currently rounds to 50 MHz ... */
345 fmid = fmid / 50 * 50;
347 igt_debug("\nCheck original min and max...\n");
350 igt_debug("\nSet min=RPn and max=RP0...\n");
351 writeval(stuff[MIN].filp, origfreqs[RPn]);
352 writeval(stuff[MAX].filp, origfreqs[RP0]);
355 igt_debug("\nIncrease min to midpoint...\n");
356 writeval(stuff[MIN].filp, fmid);
359 igt_debug("\nIncrease min to RP0...\n");
360 writeval(stuff[MIN].filp, origfreqs[RP0]);
363 igt_debug("\nIncrease min above RP0 (invalid)...\n");
364 writeval_inval(stuff[MIN].filp, origfreqs[RP0] + 1000);
367 igt_debug("\nDecrease max to RPn (invalid)...\n");
368 writeval_inval(stuff[MAX].filp, origfreqs[RPn]);
371 igt_debug("\nDecrease min to midpoint...\n");
372 writeval(stuff[MIN].filp, fmid);
375 igt_debug("\nDecrease min to RPn...\n");
376 writeval(stuff[MIN].filp, origfreqs[RPn]);
379 igt_debug("\nDecrease min below RPn (invalid)...\n");
380 writeval_inval(stuff[MIN].filp, 0);
383 igt_debug("\nDecrease max to midpoint...\n");
384 writeval(stuff[MAX].filp, fmid);
387 igt_debug("\nDecrease max to RPn...\n");
388 writeval(stuff[MAX].filp, origfreqs[RPn]);
391 igt_debug("\nDecrease max below RPn (invalid)...\n");
392 writeval_inval(stuff[MAX].filp, 0);
395 igt_debug("\nIncrease min to RP0 (invalid)...\n");
396 writeval_inval(stuff[MIN].filp, origfreqs[RP0]);
399 igt_debug("\nIncrease max to midpoint...\n");
400 writeval(stuff[MAX].filp, fmid);
403 igt_debug("\nIncrease max to RP0...\n");
404 writeval(stuff[MAX].filp, origfreqs[RP0]);
407 igt_debug("\nIncrease max above RP0 (invalid)...\n");
408 writeval_inval(stuff[MAX].filp, origfreqs[RP0] + 1000);
411 writeval(stuff[MIN].filp, origfreqs[MIN]);
412 writeval(stuff[MAX].filp, origfreqs[MAX]);
415 static void basic_check(void)
424 #define IDLE_WAIT_TIMESTEP_MSEC 100
425 #define IDLE_WAIT_TIMEOUT_MSEC 3000
426 static void idle_check(void)
431 /* Monitor frequencies until cur settles down to min, which should
432 * happen within the allotted time */
437 if (freqs[CUR] == freqs[MIN])
439 usleep(1000 * IDLE_WAIT_TIMESTEP_MSEC);
440 wait += IDLE_WAIT_TIMESTEP_MSEC;
441 } while (wait < IDLE_WAIT_TIMEOUT_MSEC);
443 igt_assert(freqs[CUR] == freqs[MIN]);
444 igt_debug("Required %d msec to reach cur=min\n", wait);
447 #define LOADED_WAIT_TIMESTEP_MSEC 100
448 #define LOADED_WAIT_TIMEOUT_MSEC 3000
449 static void loaded_check(void)
454 /* Monitor frequencies until cur increases to max, which should
455 * happen within the allotted time */
460 if (freqs[CUR] == freqs[MAX])
462 usleep(1000 * LOADED_WAIT_TIMESTEP_MSEC);
463 wait += LOADED_WAIT_TIMESTEP_MSEC;
464 } while (wait < LOADED_WAIT_TIMEOUT_MSEC);
466 igt_assert(freqs[CUR] == freqs[MAX]);
467 igt_debug("Required %d msec to reach cur=max\n", wait);
470 #define STABILIZE_WAIT_TIMESTEP_MSEC 100
471 #define STABILIZE_WAIT_TIMEOUT_MSEC 2000
472 static void stabilize_check(int *freqs)
479 usleep(1000 * STABILIZE_WAIT_TIMESTEP_MSEC);
480 wait += STABILIZE_WAIT_TIMESTEP_MSEC;
481 } while (wait < STABILIZE_WAIT_TIMEOUT_MSEC);
483 igt_debug("Waited %d msec to stabilize cur\n", wait);
486 static void reset(void)
488 int pre_freqs[NUMFREQ];
489 int post_freqs[NUMFREQ];
491 igt_debug("Apply low load...\n");
492 load_helper_run(LOW);
493 stabilize_check(pre_freqs);
495 igt_debug("Stop rings...\n");
497 while (rings_stopped())
499 igt_debug("Ring stop cleared\n");
501 igt_debug("Apply high load...\n");
502 load_helper_set_load(HIGH);
505 igt_debug("Apply low load...\n");
506 load_helper_set_load(LOW);
507 stabilize_check(post_freqs);
508 matchit(pre_freqs, post_freqs);
510 igt_debug("Apply high load...\n");
511 load_helper_set_load(HIGH);
514 igt_debug("Removing load...\n");
519 static void pm_rps_exit_handler(int sig)
521 if (origfreqs[MIN] > readval(stuff[MAX].filp)) {
522 writeval(stuff[MAX].filp, origfreqs[MAX]);
523 writeval(stuff[MIN].filp, origfreqs[MIN]);
525 writeval(stuff[MIN].filp, origfreqs[MIN]);
526 writeval(stuff[MAX].filp, origfreqs[MAX]);
529 load_helper_deinit();
535 igt_skip_on_simulation();
538 const int device = drm_get_card();
539 struct junk *junk = stuff;
542 /* Use drm_open_any to verify device existence */
543 drm_fd = drm_open_any();
548 ret = asprintf(&path, sysfs_base_path, device, junk->name);
549 igt_assert(ret != -1);
550 junk->filp = fopen(path, junk->mode);
551 igt_require(junk->filp);
552 setbuf(junk->filp, NULL);
554 val = readval(junk->filp);
555 igt_assert(val >= 0);
557 } while(junk->name != NULL);
559 read_freqs(origfreqs);
561 igt_install_exit_handler(pm_rps_exit_handler);
565 igt_debugfs_init(&dfs);
568 igt_subtest("basic-api")
569 min_max_config(basic_check);
571 igt_subtest("min-max-config-idle")
572 min_max_config(idle_check);
574 igt_subtest("min-max-config-loaded") {
575 load_helper_run(HIGH);
576 min_max_config(loaded_check);