1 /* 2 * Copyright 2011 Christian König. 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 * Authors: 28 * Christian König <deathsimple@vodafone.de> 29 */ 30 #include <drm/drmP.h> 31 #include "radeon.h" 32 #ifdef TRACE_TODO 33 #include "radeon_trace.h" 34 #endif 35 36 int radeon_semaphore_create(struct radeon_device *rdev, 37 struct radeon_semaphore **semaphore) 38 { 39 int r; 40 41 *semaphore = kmalloc(sizeof(struct radeon_semaphore), M_DRM, GFP_KERNEL); 42 if (*semaphore == NULL) { 43 return -ENOMEM; 44 } 45 r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, 46 &(*semaphore)->sa_bo, 8, 8); 47 if (r) { 48 kfree(*semaphore); 49 *semaphore = NULL; 50 return r; 51 } 52 (*semaphore)->waiters = 0; 53 (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); 54 55 *((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; 56 57 return 0; 58 } 59 60 bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx, 61 struct radeon_semaphore *semaphore) 62 { 63 struct radeon_ring *ring = &rdev->ring[ridx]; 64 65 #ifdef TRACE_TODO 66 trace_radeon_semaphore_signale(ridx, semaphore); 67 #endif 68 69 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) { 70 --semaphore->waiters; 71 72 /* for debugging lockup only, used by sysfs debug files */ 73 ring->last_semaphore_signal_addr = semaphore->gpu_addr; 74 return true; 75 } 76 return false; 77 } 78 79 bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx, 80 struct radeon_semaphore *semaphore) 81 { 82 struct radeon_ring *ring = &rdev->ring[ridx]; 83 84 #ifdef TRACE_TODO 85 trace_radeon_semaphore_wait(ridx, semaphore); 86 #endif 87 88 if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) { 89 ++semaphore->waiters; 90 91 /* for debugging lockup only, used by sysfs debug files */ 92 ring->last_semaphore_wait_addr = semaphore->gpu_addr; 93 return true; 94 } 95 return false; 96 } 97 98 void radeon_semaphore_free(struct radeon_device *rdev, 99 struct radeon_semaphore **semaphore, 100 struct radeon_fence *fence) 101 { 102 if (semaphore == NULL || *semaphore == NULL) { 103 return; 104 } 105 if ((*semaphore)->waiters > 0) { 106 dev_err(rdev->dev, "semaphore %p has more waiters than signalers," 107 " hardware lockup imminent!\n", *semaphore); 108 } 109 radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); 110 kfree(*semaphore); 111 *semaphore = NULL; 112 } 113