| /* |
| * Copyright © 2016 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| */ |
| |
| #include <sched.h> |
| |
| #include "igt.h" |
| #include "igt_debugfs.h" |
| #include "igt_dummyload.h" |
| #include "igt_sysfs.h" |
| |
| IGT_TEST_DESCRIPTION("Inject missed interrupts and make sure they are caught"); |
| |
| static void trigger_missed_interrupt(int fd, unsigned ring) |
| { |
| igt_spin_t *spin = __igt_spin_batch_new(fd, 0, ring, 0); |
| |
| igt_fork(child, 1) { |
| /* We are now a low priority child on the *same* CPU as the |
| * parent. We will have to wait for our parent to sleep |
| * (gem_sync -> i915_wait_request) before we run. |
| */ |
| igt_assert(gem_bo_busy(fd, spin->handle)); |
| igt_spin_batch_end(spin); |
| } |
| |
| gem_sync(fd, spin->handle); |
| igt_waitchildren(); |
| |
| igt_spin_batch_free(fd, spin); |
| } |
| |
| static void bind_to_cpu(int cpu) |
| { |
| const int ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
| struct sched_param rt = {.sched_priority = 99 }; |
| cpu_set_t allowed; |
| |
| igt_assert(sched_setscheduler(getpid(), SCHED_RR | SCHED_RESET_ON_FORK, &rt) == 0); |
| |
| CPU_ZERO(&allowed); |
| CPU_SET(cpu % ncpus, &allowed); |
| igt_assert(sched_setaffinity(getpid(), sizeof(cpu_set_t), &allowed) == 0); |
| } |
| |
| static void enable_missed_irq(int dir) |
| { |
| igt_sysfs_printf(dir, "i915_ring_test_irq", "0x%x", -1); |
| } |
| |
| static uint32_t disable_missed_irq(int dir) |
| { |
| uint32_t mask = 0; |
| |
| igt_sysfs_scanf(dir, "i915_ring_test_irq", "%x", &mask); |
| igt_sysfs_set(dir, "i915_ring_test_irq", "0"); |
| |
| return mask; |
| } |
| |
| static uint32_t engine_mask(int dir) |
| { |
| enable_missed_irq(dir); |
| return disable_missed_irq(dir); |
| } |
| |
| igt_simple_main |
| { |
| const struct intel_execution_engine *e; |
| unsigned expect_rings; |
| unsigned missed_rings; |
| unsigned check_rings; |
| int debugfs, device; |
| |
| igt_skip_on_simulation(); |
| bind_to_cpu(0); |
| |
| device = drm_open_driver(DRIVER_INTEL); |
| igt_require_gem(device); |
| igt_skip_on(gem_has_guc_submission(device)); /* irq forced for guc */ |
| gem_require_mmap_wc(device); |
| igt_fork_hang_detector(device); |
| |
| debugfs = igt_debugfs_dir(device); |
| |
| expect_rings = engine_mask(debugfs); |
| |
| igt_debug("Clearing rings %x\n", expect_rings); |
| intel_detect_and_clear_missed_interrupts(device); |
| for (e = intel_execution_engines; e->name; e++) { |
| if (expect_rings == -1 && e->exec_id) |
| continue; |
| |
| if (expect_rings != -1 && e->exec_id == 0) |
| continue; |
| |
| if (!gem_has_ring(device, e->exec_id | e->flags)) |
| continue; |
| |
| igt_debug("Clearing ring %s [%x]\n", |
| e->name, e->exec_id | e->flags); |
| trigger_missed_interrupt(device, e->exec_id | e->flags); |
| } |
| igt_assert_eq(intel_detect_and_clear_missed_interrupts(device), 0); |
| |
| igt_debug("Testing rings %x\n", expect_rings); |
| enable_missed_irq(debugfs); |
| for (e = intel_execution_engines; e->name; e++) { |
| if (expect_rings == -1 && e->exec_id) |
| continue; |
| |
| if (expect_rings != -1 && e->exec_id == 0) |
| continue; |
| |
| if (!gem_has_ring(device, e->exec_id | e->flags)) |
| continue; |
| |
| igt_debug("Executing on ring %s [%x]\n", |
| e->name, e->exec_id | e->flags); |
| trigger_missed_interrupt(device, e->exec_id | e->flags); |
| } |
| missed_rings = intel_detect_and_clear_missed_interrupts(device); |
| |
| check_rings = disable_missed_irq(debugfs); |
| igt_assert_eq_u32(check_rings, expect_rings); |
| |
| if (expect_rings == -1) |
| igt_assert_eq_u32(missed_rings, 1); |
| else |
| igt_assert_eq_u32(missed_rings, expect_rings); |
| |
| close(debugfs); |
| igt_stop_hang_detector(); |
| close(device); |
| } |