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1/*2 * Copyright 2011 Christian König.3 * All Rights Reserved.4 *5 * Permission is hereby granted, free of charge, to any person obtaining a6 * copy of this software and associated documentation files (the7 * "Software"), to deal in the Software without restriction, including8 * without limitation the rights to use, copy, modify, merge, publish,9 * distribute, sub license, and/or sell copies of the Software, and to10 * permit persons to whom the Software is furnished to do so, subject to11 * the following conditions:12 *13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE19 * USE OR OTHER DEALINGS IN THE SOFTWARE.20 *21 * The above copyright notice and this permission notice (including the22 * next paragraph) shall be included in all copies or substantial portions23 * of the Software.24 *25 */26/*27 * Authors:28 * Christian König <deathsimple@vodafone.de>29 */30 31#include "radeon.h"32#include "radeon_trace.h"33 34int radeon_semaphore_create(struct radeon_device *rdev,35 struct radeon_semaphore **semaphore)36{37 int r;38 39 *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);40 if (*semaphore == NULL) {41 return -ENOMEM;42 }43 r = radeon_sa_bo_new(&rdev->ring_tmp_bo,44 &(*semaphore)->sa_bo, 8, 8);45 if (r) {46 kfree(*semaphore);47 *semaphore = NULL;48 return r;49 }50 (*semaphore)->waiters = 0;51 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);52 53 *((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;54 55 return 0;56}57 58bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,59 struct radeon_semaphore *semaphore)60{61 struct radeon_ring *ring = &rdev->ring[ridx];62 63 trace_radeon_semaphore_signale(ridx, semaphore);64 65 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) {66 --semaphore->waiters;67 68 /* for debugging lockup only, used by sysfs debug files */69 ring->last_semaphore_signal_addr = semaphore->gpu_addr;70 return true;71 }72 return false;73}74 75bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,76 struct radeon_semaphore *semaphore)77{78 struct radeon_ring *ring = &rdev->ring[ridx];79 80 trace_radeon_semaphore_wait(ridx, semaphore);81 82 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) {83 ++semaphore->waiters;84 85 /* for debugging lockup only, used by sysfs debug files */86 ring->last_semaphore_wait_addr = semaphore->gpu_addr;87 return true;88 }89 return false;90}91 92void radeon_semaphore_free(struct radeon_device *rdev,93 struct radeon_semaphore **semaphore,94 struct radeon_fence *fence)95{96 if (semaphore == NULL || *semaphore == NULL) {97 return;98 }99 if ((*semaphore)->waiters > 0) {100 dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"101 " hardware lockup imminent!\n", *semaphore);102 }103 radeon_sa_bo_free(&(*semaphore)->sa_bo, fence);104 kfree(*semaphore);105 *semaphore = NULL;106}107