| /* |
| * 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 allocate_semaphores(struct radeon_device *rdev) |
| { |
| const unsigned long bo_size = PAGE_SIZE * 4; |
| |
| struct radeon_bo *bo; |
| struct list_head new_entrys; |
| unsigned long irq_flags; |
| uint64_t gpu_addr; |
| void *map; |
| int i, r; |
| |
| r = radeon_bo_create(rdev, bo_size, RADEON_GPU_PAGE_SIZE, true, |
| RADEON_GEM_DOMAIN_GTT, &bo); |
| if (r) { |
| dev_err(rdev->dev, "(%d) failed to allocate semaphore bo\n", r); |
| return r; |
| } |
| |
| r = radeon_bo_reserve(bo, false); |
| if (r) { |
| radeon_bo_unref(&bo); |
| dev_err(rdev->dev, "(%d) failed to reserve semaphore bo\n", r); |
| return r; |
| } |
| |
| r = radeon_bo_kmap(bo, &map); |
| if (r) { |
| radeon_bo_unreserve(bo); |
| radeon_bo_unref(&bo); |
| dev_err(rdev->dev, "(%d) semaphore map failed\n", r); |
| return r; |
| } |
| memset(map, 0, bo_size); |
| radeon_bo_kunmap(bo); |
| |
| r = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_VRAM, &gpu_addr); |
| if (r) { |
| radeon_bo_unreserve(bo); |
| radeon_bo_unref(&bo); |
| dev_err(rdev->dev, "(%d) semaphore pin failed\n", r); |
| return r; |
| } |
| |
| INIT_LIST_HEAD(&new_entrys); |
| for (i = 0; i < bo_size/8; ++i) { |
| struct radeon_semaphore *sem = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); |
| ttm_bo_reference(&bo->tbo); |
| sem->robj = bo; |
| sem->gpu_addr = gpu_addr; |
| gpu_addr += 8; |
| list_add_tail(&sem->list, &new_entrys); |
| } |
| |
| radeon_bo_unreserve(bo); |
| radeon_bo_unref(&bo); |
| |
| write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); |
| list_splice_tail(&new_entrys, &rdev->semaphore_drv.free); |
| write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); |
| |
| DRM_INFO("%d new semaphores allocated\n", (int)(bo_size/8)); |
| |
| return 0; |
| } |
| |
| int radeon_semaphore_create(struct radeon_device *rdev, |
| struct radeon_semaphore **semaphore) |
| { |
| unsigned long irq_flags; |
| |
| write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); |
| if (list_empty(&rdev->semaphore_drv.free)) { |
| int r; |
| write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); |
| r = allocate_semaphores(rdev); |
| if (r) |
| return r; |
| write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); |
| } |
| |
| *semaphore = list_first_entry(&rdev->semaphore_drv.free, struct radeon_semaphore, list); |
| list_del(&(*semaphore)->list); |
| |
| write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); |
| return 0; |
| } |
| |
| void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, |
| struct radeon_semaphore *semaphore) |
| { |
| radeon_semaphore_ring_emit(rdev, &rdev->cp[ring], semaphore, false); |
| } |
| |
| void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, |
| struct radeon_semaphore *semaphore) |
| { |
| radeon_semaphore_ring_emit(rdev, &rdev->cp[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); |
| list_add_tail(&semaphore->list, &rdev->semaphore_drv.free); |
| write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); |
| } |
| |
| void radeon_semaphore_driver_fini(struct radeon_device *rdev) |
| { |
| struct radeon_semaphore *i, *n; |
| struct list_head entrys; |
| unsigned long irq_flags; |
| |
| INIT_LIST_HEAD(&entrys); |
| write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); |
| if (!list_empty(&rdev->semaphore_drv.free)) { |
| list_splice(&rdev->semaphore_drv.free, &entrys); |
| } |
| INIT_LIST_HEAD(&rdev->semaphore_drv.free); |
| write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); |
| |
| list_for_each_entry_safe(i, n, &entrys, list) { |
| radeon_bo_unref(&i->robj); |
| kfree(i); |
| } |
| } |