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/*
* 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, ring, &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, ring, &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);
}
}
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