diff options
Diffstat (limited to 'sys/dev/drm2/radeon/radeon_semaphore.c')
-rw-r--r-- | sys/dev/drm2/radeon/radeon_semaphore.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/sys/dev/drm2/radeon/radeon_semaphore.c b/sys/dev/drm2/radeon/radeon_semaphore.c new file mode 100644 index 0000000..717a94a --- /dev/null +++ b/sys/dev/drm2/radeon/radeon_semaphore.c @@ -0,0 +1,124 @@ +/* + * Copyright 2011 Christian König. + * All Rights Reserved. + * + * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Authors: + * Christian König <deathsimple@vodafone.de> + */ +#include <dev/drm2/drmP.h> +#include "radeon.h" + + +int radeon_semaphore_create(struct radeon_device *rdev, + struct radeon_semaphore **semaphore) +{ + int r; + + *semaphore = malloc(sizeof(struct radeon_semaphore), + DRM_MEM_DRIVER, M_WAITOK); + if (*semaphore == NULL) { + return -ENOMEM; + } + r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, + &(*semaphore)->sa_bo, 8, 8, true); + if (r) { + free(*semaphore, DRM_MEM_DRIVER); + *semaphore = NULL; + return r; + } + (*semaphore)->waiters = 0; + (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); + *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; + return 0; +} + +void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, + struct radeon_semaphore *semaphore) +{ + --semaphore->waiters; + radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false); +} + +void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, + struct radeon_semaphore *semaphore) +{ + ++semaphore->waiters; + radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true); +} + +/* caller must hold ring lock */ +int radeon_semaphore_sync_rings(struct radeon_device *rdev, + struct radeon_semaphore *semaphore, + int signaler, int waiter) +{ + int r; + + /* no need to signal and wait on the same ring */ + if (signaler == waiter) { + return 0; + } + + /* prevent GPU deadlocks */ + if (!rdev->ring[signaler].ready) { + dev_err(rdev->dev, "Trying to sync to a disabled ring!"); + return -EINVAL; + } + + r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8); + if (r) { + return r; + } + radeon_semaphore_emit_signal(rdev, signaler, semaphore); + radeon_ring_commit(rdev, &rdev->ring[signaler]); + + /* we assume caller has already allocated space on waiters ring */ + radeon_semaphore_emit_wait(rdev, waiter, semaphore); + + /* for debugging lockup only, used by sysfs debug files */ + rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr; + rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr; + + return 0; +} + +void radeon_semaphore_free(struct radeon_device *rdev, + struct radeon_semaphore **semaphore, + struct radeon_fence *fence) +{ + if (semaphore == NULL || *semaphore == NULL) { + return; + } + if ((*semaphore)->waiters > 0) { + dev_err(rdev->dev, "semaphore %p has more waiters than signalers," + " hardware lockup imminent!\n", *semaphore); + } + radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); + free(*semaphore, DRM_MEM_DRIVER); + *semaphore = NULL; +} |