radeon_semaphore.c revision 254885
1/* 2 * Copyright 2011 Christian K��nig. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 16 * 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 OR 18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 19 * USE OR OTHER DEALINGS IN THE SOFTWARE. 20 * 21 * The above copyright notice and this permission notice (including the 22 * next paragraph) shall be included in all copies or substantial portions 23 * of the Software. 24 * 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/drm2/radeon/radeon_semaphore.c 254885 2013-08-25 19:37:15Z dumbbell $"); 29 30/* 31 * Authors: 32 * Christian K��nig <deathsimple@vodafone.de> 33 */ 34#include <dev/drm2/drmP.h> 35#include "radeon.h" 36 37 38int radeon_semaphore_create(struct radeon_device *rdev, 39 struct radeon_semaphore **semaphore) 40{ 41 int r; 42 43 *semaphore = malloc(sizeof(struct radeon_semaphore), 44 DRM_MEM_DRIVER, M_WAITOK); 45 if (*semaphore == NULL) { 46 return -ENOMEM; 47 } 48 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, 49 &(*semaphore)->sa_bo, 8, 8, true); 50 if (r) { 51 free(*semaphore, DRM_MEM_DRIVER); 52 *semaphore = NULL; 53 return r; 54 } 55 (*semaphore)->waiters = 0; 56 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); 57 *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; 58 return 0; 59} 60 61void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, 62 struct radeon_semaphore *semaphore) 63{ 64 --semaphore->waiters; 65 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false); 66} 67 68void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, 69 struct radeon_semaphore *semaphore) 70{ 71 ++semaphore->waiters; 72 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true); 73} 74 75/* caller must hold ring lock */ 76int radeon_semaphore_sync_rings(struct radeon_device *rdev, 77 struct radeon_semaphore *semaphore, 78 int signaler, int waiter) 79{ 80 int r; 81 82 /* no need to signal and wait on the same ring */ 83 if (signaler == waiter) { 84 return 0; 85 } 86 87 /* prevent GPU deadlocks */ 88 if (!rdev->ring[signaler].ready) { 89 dev_err(rdev->dev, "Trying to sync to a disabled ring!"); 90 return -EINVAL; 91 } 92 93 r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8); 94 if (r) { 95 return r; 96 } 97 radeon_semaphore_emit_signal(rdev, signaler, semaphore); 98 radeon_ring_commit(rdev, &rdev->ring[signaler]); 99 100 /* we assume caller has already allocated space on waiters ring */ 101 radeon_semaphore_emit_wait(rdev, waiter, semaphore); 102 103 /* for debugging lockup only, used by sysfs debug files */ 104 rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr; 105 rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr; 106 107 return 0; 108} 109 110void radeon_semaphore_free(struct radeon_device *rdev, 111 struct radeon_semaphore **semaphore, 112 struct radeon_fence *fence) 113{ 114 if (semaphore == NULL || *semaphore == NULL) { 115 return; 116 } 117 if ((*semaphore)->waiters > 0) { 118 dev_err(rdev->dev, "semaphore %p has more waiters than signalers," 119 " hardware lockup imminent!\n", *semaphore); 120 } 121 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); 122 free(*semaphore, DRM_MEM_DRIVER); 123 *semaphore = NULL; 124} 125