0,0 → 1,115 |
/* |
* 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 <drm/drmP.h> |
#include "radeon.h" |
|
|
int radeon_semaphore_create(struct radeon_device *rdev, |
struct radeon_semaphore **semaphore) |
{ |
int r; |
|
*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); |
if (*semaphore == NULL) { |
return -ENOMEM; |
} |
r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, |
&(*semaphore)->sa_bo, 8, 8, true); |
if (r) { |
kfree(*semaphore); |
*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); |
|
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); |
kfree(*semaphore); |
*semaphore = NULL; |
} |