diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_semaphore.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_semaphore.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c new file mode 100644 index 000000000000..61dd4e3c9209 --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_semaphore.c @@ -0,0 +1,178 @@ +/* + * 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. + * + */ +/* + * Authors: + * Christian König <deathsimple@vodafone.de> + */ +#include "drmP.h" +#include "drm.h" +#include "radeon.h" + +static int radeon_semaphore_add_bo(struct radeon_device *rdev) +{ + struct radeon_semaphore_bo *bo; + unsigned long irq_flags; + uint64_t gpu_addr; + uint32_t *cpu_ptr; + int r, i; + + + bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL); + if (bo == NULL) { + return -ENOMEM; + } + INIT_LIST_HEAD(&bo->free); + INIT_LIST_HEAD(&bo->list); + bo->nused = 0; + + r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE); + if (r) { + dev_err(rdev->dev, "failed to get a bo after 5 retry\n"); + kfree(bo); + return r; + } + gpu_addr = rdev->ib_pool.sa_manager.gpu_addr; + gpu_addr += bo->ib->sa_bo.offset; + cpu_ptr = rdev->ib_pool.sa_manager.cpu_ptr; + cpu_ptr += (bo->ib->sa_bo.offset >> 2); + for (i = 0; i < (RADEON_SEMAPHORE_BO_SIZE/8); i++) { + bo->semaphores[i].gpu_addr = gpu_addr; + bo->semaphores[i].cpu_ptr = cpu_ptr; + bo->semaphores[i].bo = bo; + list_add_tail(&bo->semaphores[i].list, &bo->free); + gpu_addr += 8; + cpu_ptr += 2; + } + write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); + list_add_tail(&bo->list, &rdev->semaphore_drv.bo); + write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); + return 0; +} + +static void radeon_semaphore_del_bo_locked(struct radeon_device *rdev, + struct radeon_semaphore_bo *bo) +{ + radeon_sa_bo_free(rdev, &bo->ib->sa_bo); + radeon_fence_unref(&bo->ib->fence); + list_del(&bo->list); + kfree(bo); +} + +void radeon_semaphore_shrink_locked(struct radeon_device *rdev) +{ + struct radeon_semaphore_bo *bo, *n; + + if (list_empty(&rdev->semaphore_drv.bo)) { + return; + } + /* only shrink if first bo has free semaphore */ + bo = list_first_entry(&rdev->semaphore_drv.bo, struct radeon_semaphore_bo, list); + if (list_empty(&bo->free)) { + return; + } + list_for_each_entry_safe_continue(bo, n, &rdev->semaphore_drv.bo, list) { + if (bo->nused) + continue; + radeon_semaphore_del_bo_locked(rdev, bo); + } +} + +int radeon_semaphore_create(struct radeon_device *rdev, + struct radeon_semaphore **semaphore) +{ + struct radeon_semaphore_bo *bo; + unsigned long irq_flags; + bool do_retry = true; + int r; + +retry: + *semaphore = NULL; + write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); + list_for_each_entry(bo, &rdev->semaphore_drv.bo, list) { + if (list_empty(&bo->free)) + continue; + *semaphore = list_first_entry(&bo->free, struct radeon_semaphore, list); + (*semaphore)->cpu_ptr[0] = 0; + (*semaphore)->cpu_ptr[1] = 0; + list_del(&(*semaphore)->list); + bo->nused++; + break; + } + write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); + + if (*semaphore == NULL) { + if (do_retry) { + do_retry = false; + r = radeon_semaphore_add_bo(rdev); + if (r) + return r; + goto retry; + } + return -ENOMEM; + } + + return 0; +} + +void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, + struct radeon_semaphore *semaphore) +{ + 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) +{ + radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true); +} + +void radeon_semaphore_free(struct radeon_device *rdev, + struct radeon_semaphore *semaphore) +{ + unsigned long irq_flags; + + write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); + semaphore->bo->nused--; + list_add_tail(&semaphore->list, &semaphore->bo->free); + radeon_semaphore_shrink_locked(rdev); + write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); +} + +void radeon_semaphore_driver_fini(struct radeon_device *rdev) +{ + struct radeon_semaphore_bo *bo, *n; + unsigned long irq_flags; + + write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); + /* we force to free everything */ + list_for_each_entry_safe(bo, n, &rdev->semaphore_drv.bo, list) { + if (!list_empty(&bo->free)) { + dev_err(rdev->dev, "still in use semaphore\n"); + } + radeon_semaphore_del_bo_locked(rdev, bo); + } + write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); +} |