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 #include "radeon_trace.h" 33 34 int 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, &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 58 bool 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 75 bool 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 92 void 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(rdev, &(*semaphore)->sa_bo, fence); 104 kfree(*semaphore); 105 *semaphore = NULL; 106 } 107