diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_rps.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/selftest_gt_pm.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/selftest_rps.c | 223 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/selftest_rps.h | 11 |
4 files changed, 240 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c index 86110458e2a7..d19161c7a3d8 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.c +++ b/drivers/gpu/drm/i915/gt/intel_rps.c @@ -1923,3 +1923,7 @@ bool i915_gpu_turbo_disable(void) return ret; } EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); + +#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) +#include "selftest_rps.c" +#endif diff --git a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c index 09ff8e4f88af..c50bb502fe03 100644 --- a/drivers/gpu/drm/i915/gt/selftest_gt_pm.c +++ b/drivers/gpu/drm/i915/gt/selftest_gt_pm.c @@ -7,6 +7,7 @@ #include "selftest_llc.h" #include "selftest_rc6.h" +#include "selftest_rps.h" static int live_gt_resume(void *arg) { @@ -52,6 +53,7 @@ int intel_gt_pm_live_selftests(struct drm_i915_private *i915) { static const struct i915_subtest tests[] = { SUBTEST(live_rc6_manual), + SUBTEST(live_rps_interrupt), SUBTEST(live_gt_resume), }; diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c new file mode 100644 index 000000000000..26aadc2ae3be --- /dev/null +++ b/drivers/gpu/drm/i915/gt/selftest_rps.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2020 Intel Corporation + */ + +#include "intel_engine_pm.h" +#include "intel_gt_pm.h" +#include "intel_rc6.h" +#include "selftest_rps.h" +#include "selftests/igt_flush_test.h" +#include "selftests/igt_spinner.h" + +static void dummy_rps_work(struct work_struct *wrk) +{ +} + +static int __rps_up_interrupt(struct intel_rps *rps, + struct intel_engine_cs *engine, + struct igt_spinner *spin) +{ + struct intel_uncore *uncore = engine->uncore; + struct i915_request *rq; + u32 timeout; + + if (!intel_engine_can_store_dword(engine)) + return 0; + + intel_gt_pm_wait_for_idle(engine->gt); + GEM_BUG_ON(rps->active); + + rps->pm_iir = 0; + rps->cur_freq = rps->min_freq; + + rq = igt_spinner_create_request(spin, engine->kernel_context, MI_NOOP); + if (IS_ERR(rq)) + return PTR_ERR(rq); + + i915_request_get(rq); + i915_request_add(rq); + + if (!igt_wait_for_spinner(spin, rq)) { + pr_err("%s: RPS spinner did not start\n", + engine->name); + i915_request_put(rq); + intel_gt_set_wedged(engine->gt); + return -EIO; + } + + if (!rps->active) { + pr_err("%s: RPS not enabled on starting spinner\n", + engine->name); + igt_spinner_end(spin); + i915_request_put(rq); + return -EINVAL; + } + + if (!(rps->pm_events & GEN6_PM_RP_UP_THRESHOLD)) { + pr_err("%s: RPS did not register UP interrupt\n", + engine->name); + i915_request_put(rq); + return -EINVAL; + } + + if (rps->last_freq != rps->min_freq) { + pr_err("%s: RPS did not program min frequency\n", + engine->name); + i915_request_put(rq); + return -EINVAL; + } + + timeout = intel_uncore_read(uncore, GEN6_RP_UP_EI); + timeout = GT_PM_INTERVAL_TO_US(engine->i915, timeout); + + usleep_range(2 * timeout, 3 * timeout); + GEM_BUG_ON(i915_request_completed(rq)); + + igt_spinner_end(spin); + i915_request_put(rq); + + if (rps->cur_freq != rps->min_freq) { + pr_err("%s: Frequency unexpectedly changed [up], now %d!\n", + engine->name, intel_rps_read_actual_frequency(rps)); + return -EINVAL; + } + + if (!(rps->pm_iir & GEN6_PM_RP_UP_THRESHOLD)) { + pr_err("%s: UP interrupt not recorded for spinner, pm_iir:%x, prev_up:%x, up_threshold:%x, up_ei:%x\n", + engine->name, rps->pm_iir, + intel_uncore_read(uncore, GEN6_RP_PREV_UP), + intel_uncore_read(uncore, GEN6_RP_UP_THRESHOLD), + intel_uncore_read(uncore, GEN6_RP_UP_EI)); + return -EINVAL; + } + + intel_gt_pm_wait_for_idle(engine->gt); + return 0; +} + +static int __rps_down_interrupt(struct intel_rps *rps, + struct intel_engine_cs *engine) +{ + struct intel_uncore *uncore = engine->uncore; + u32 timeout; + + mutex_lock(&rps->lock); + GEM_BUG_ON(!rps->active); + intel_rps_set(rps, rps->max_freq); + mutex_unlock(&rps->lock); + + if (!(rps->pm_events & GEN6_PM_RP_DOWN_THRESHOLD)) { + pr_err("%s: RPS did not register DOWN interrupt\n", + engine->name); + return -EINVAL; + } + + if (rps->last_freq != rps->max_freq) { + pr_err("%s: RPS did not program max frequency\n", + engine->name); + return -EINVAL; + } + + timeout = intel_uncore_read(uncore, GEN6_RP_DOWN_EI); + timeout = GT_PM_INTERVAL_TO_US(engine->i915, timeout); + + /* Flush any previous EI */ + usleep_range(timeout, 2 * timeout); + + /* Reset the interrupt status */ + rps_disable_interrupts(rps); + GEM_BUG_ON(rps->pm_iir); + rps_enable_interrupts(rps); + + /* And then wait for the timeout, for real this time */ + usleep_range(2 * timeout, 3 * timeout); + + if (rps->cur_freq != rps->max_freq) { + pr_err("%s: Frequency unexpectedly changed [down], now %d!\n", + engine->name, + intel_rps_read_actual_frequency(rps)); + return -EINVAL; + } + + if (!(rps->pm_iir & (GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT))) { + pr_err("%s: DOWN interrupt not recorded for idle, pm_iir:%x, prev_down:%x, down_threshold:%x, down_ei:%x [prev_up:%x, up_threshold:%x, up_ei:%x]\n", + engine->name, rps->pm_iir, + intel_uncore_read(uncore, GEN6_RP_PREV_DOWN), + intel_uncore_read(uncore, GEN6_RP_DOWN_THRESHOLD), + intel_uncore_read(uncore, GEN6_RP_DOWN_EI), + intel_uncore_read(uncore, GEN6_RP_PREV_UP), + intel_uncore_read(uncore, GEN6_RP_UP_THRESHOLD), + intel_uncore_read(uncore, GEN6_RP_UP_EI)); + return -EINVAL; + } + + return 0; +} + +int live_rps_interrupt(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_rps *rps = >->rps; + void (*saved_work)(struct work_struct *wrk); + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct igt_spinner spin; + u32 pm_events; + int err = 0; + + /* + * First, let's check whether or not we are receiving interrupts. + */ + + if (!rps->enabled || rps->max_freq <= rps->min_freq) + return 0; + + intel_gt_pm_get(gt); + pm_events = rps->pm_events; + intel_gt_pm_put(gt); + if (!pm_events) { + pr_err("No RPS PM events registered, but RPS is enabled?\n"); + return -ENODEV; + } + + if (igt_spinner_init(&spin, gt)) + return -ENOMEM; + + intel_gt_pm_wait_for_idle(gt); + saved_work = rps->work.func; + rps->work.func = dummy_rps_work; + + for_each_engine(engine, gt, id) { + /* Keep the engine busy with a spinner; expect an UP! */ + if (pm_events & GEN6_PM_RP_UP_THRESHOLD) { + err = __rps_up_interrupt(rps, engine, &spin); + if (err) + goto out; + } + + /* Keep the engine awake but idle and check for DOWN */ + if (pm_events & GEN6_PM_RP_DOWN_THRESHOLD) { + intel_engine_pm_get(engine); + intel_rc6_disable(>->rc6); + + err = __rps_down_interrupt(rps, engine); + + intel_rc6_enable(>->rc6); + intel_engine_pm_put(engine); + if (err) + goto out; + } + } + +out: + if (igt_flush_test(gt->i915)) + err = -EIO; + + igt_spinner_fini(&spin); + + intel_gt_pm_wait_for_idle(gt); + rps->work.func = saved_work; + + return err; +} diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.h b/drivers/gpu/drm/i915/gt/selftest_rps.h new file mode 100644 index 000000000000..abba66420996 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/selftest_rps.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2020 Intel Corporation + */ + +#ifndef SELFTEST_RPS_H +#define SELFTEST_RPS_H + +int live_rps_interrupt(void *arg); + +#endif /* SELFTEST_RPS_H */ |