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 "drmP.h"
31 #include "drm.h"
32 #include "radeon.h"
33
radeon_semaphore_add_bo(struct radeon_device * rdev)34 static int radeon_semaphore_add_bo(struct radeon_device *rdev)
35 {
36 struct radeon_semaphore_bo *bo;
37 unsigned long irq_flags;
38 uint64_t gpu_addr;
39 uint32_t *cpu_ptr;
40 int r, i;
41
42
43 bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL);
44 if (bo == NULL) {
45 return -ENOMEM;
46 }
47 INIT_LIST_HEAD(&bo->free);
48 INIT_LIST_HEAD(&bo->list);
49 bo->nused = 0;
50
51 r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE);
52 if (r) {
53 dev_err(rdev->dev, "failed to get a bo after 5 retry\n");
54 kfree(bo);
55 return r;
56 }
57 gpu_addr = rdev->ib_pool.sa_manager.gpu_addr;
58 gpu_addr += bo->ib->sa_bo.offset;
59 cpu_ptr = rdev->ib_pool.sa_manager.cpu_ptr;
60 cpu_ptr += (bo->ib->sa_bo.offset >> 2);
61 for (i = 0; i < (RADEON_SEMAPHORE_BO_SIZE/8); i++) {
62 bo->semaphores[i].gpu_addr = gpu_addr;
63 bo->semaphores[i].cpu_ptr = cpu_ptr;
64 bo->semaphores[i].bo = bo;
65 list_add_tail(&bo->semaphores[i].list, &bo->free);
66 gpu_addr += 8;
67 cpu_ptr += 2;
68 }
69 write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
70 list_add_tail(&bo->list, &rdev->semaphore_drv.bo);
71 write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
72 return 0;
73 }
74
radeon_semaphore_del_bo_locked(struct radeon_device * rdev,struct radeon_semaphore_bo * bo)75 static void radeon_semaphore_del_bo_locked(struct radeon_device *rdev,
76 struct radeon_semaphore_bo *bo)
77 {
78 radeon_sa_bo_free(rdev, &bo->ib->sa_bo);
79 radeon_fence_unref(&bo->ib->fence);
80 list_del(&bo->list);
81 kfree(bo);
82 }
83
radeon_semaphore_shrink_locked(struct radeon_device * rdev)84 void radeon_semaphore_shrink_locked(struct radeon_device *rdev)
85 {
86 struct radeon_semaphore_bo *bo, *n;
87
88 if (list_empty(&rdev->semaphore_drv.bo)) {
89 return;
90 }
91 /* only shrink if first bo has free semaphore */
92 bo = list_first_entry(&rdev->semaphore_drv.bo, struct radeon_semaphore_bo, list);
93 if (list_empty(&bo->free)) {
94 return;
95 }
96 list_for_each_entry_safe_continue(bo, n, &rdev->semaphore_drv.bo, list) {
97 if (bo->nused)
98 continue;
99 radeon_semaphore_del_bo_locked(rdev, bo);
100 }
101 }
102
radeon_semaphore_create(struct radeon_device * rdev,struct radeon_semaphore ** semaphore)103 int radeon_semaphore_create(struct radeon_device *rdev,
104 struct radeon_semaphore **semaphore)
105 {
106 struct radeon_semaphore_bo *bo;
107 unsigned long irq_flags;
108 bool do_retry = true;
109 int r;
110
111 retry:
112 *semaphore = NULL;
113 write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
114 list_for_each_entry(bo, &rdev->semaphore_drv.bo, list) {
115 if (list_empty(&bo->free))
116 continue;
117 *semaphore = list_first_entry(&bo->free, struct radeon_semaphore, list);
118 (*semaphore)->cpu_ptr[0] = 0;
119 (*semaphore)->cpu_ptr[1] = 0;
120 list_del(&(*semaphore)->list);
121 bo->nused++;
122 break;
123 }
124 write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
125
126 if (*semaphore == NULL) {
127 if (do_retry) {
128 do_retry = false;
129 r = radeon_semaphore_add_bo(rdev);
130 if (r)
131 return r;
132 goto retry;
133 }
134 return -ENOMEM;
135 }
136
137 return 0;
138 }
139
radeon_semaphore_emit_signal(struct radeon_device * rdev,int ring,struct radeon_semaphore * semaphore)140 void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
141 struct radeon_semaphore *semaphore)
142 {
143 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
144 }
145
radeon_semaphore_emit_wait(struct radeon_device * rdev,int ring,struct radeon_semaphore * semaphore)146 void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
147 struct radeon_semaphore *semaphore)
148 {
149 radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
150 }
151
radeon_semaphore_free(struct radeon_device * rdev,struct radeon_semaphore * semaphore)152 void radeon_semaphore_free(struct radeon_device *rdev,
153 struct radeon_semaphore *semaphore)
154 {
155 unsigned long irq_flags;
156
157 write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
158 semaphore->bo->nused--;
159 list_add_tail(&semaphore->list, &semaphore->bo->free);
160 radeon_semaphore_shrink_locked(rdev);
161 write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
162 }
163
radeon_semaphore_driver_fini(struct radeon_device * rdev)164 void radeon_semaphore_driver_fini(struct radeon_device *rdev)
165 {
166 struct radeon_semaphore_bo *bo, *n;
167 unsigned long irq_flags;
168
169 write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
170 /* we force to free everything */
171 list_for_each_entry_safe(bo, n, &rdev->semaphore_drv.bo, list) {
172 if (!list_empty(&bo->free)) {
173 dev_err(rdev->dev, "still in use semaphore\n");
174 }
175 radeon_semaphore_del_bo_locked(rdev, bo);
176 }
177 write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
178 }
179