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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 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);
}
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