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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 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 | ||
34 | static int allocate_semaphores(struct radeon_device *rdev) | |
35 | { | |
36 | const unsigned long bo_size = PAGE_SIZE * 4; | |
37 | ||
38 | struct radeon_bo *bo; | |
39 | struct list_head new_entrys; | |
40 | unsigned long irq_flags; | |
41 | uint64_t gpu_addr; | |
42 | void *map; | |
43 | int i, r; | |
44 | ||
45 | r = radeon_bo_create(rdev, bo_size, RADEON_GPU_PAGE_SIZE, true, | |
46 | RADEON_GEM_DOMAIN_GTT, &bo); | |
47 | if (r) { | |
48 | dev_err(rdev->dev, "(%d) failed to allocate semaphore bo\n", r); | |
49 | return r; | |
50 | } | |
51 | ||
52 | r = radeon_bo_reserve(bo, false); | |
53 | if (r) { | |
54 | radeon_bo_unref(&bo); | |
55 | dev_err(rdev->dev, "(%d) failed to reserve semaphore bo\n", r); | |
56 | return r; | |
57 | } | |
58 | ||
59 | r = radeon_bo_kmap(bo, &map); | |
60 | if (r) { | |
61 | radeon_bo_unreserve(bo); | |
62 | radeon_bo_unref(&bo); | |
63 | dev_err(rdev->dev, "(%d) semaphore map failed\n", r); | |
64 | return r; | |
65 | } | |
66 | memset(map, 0, bo_size); | |
67 | radeon_bo_kunmap(bo); | |
68 | ||
69 | r = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_VRAM, &gpu_addr); | |
70 | if (r) { | |
71 | radeon_bo_unreserve(bo); | |
72 | radeon_bo_unref(&bo); | |
73 | dev_err(rdev->dev, "(%d) semaphore pin failed\n", r); | |
74 | return r; | |
75 | } | |
76 | ||
77 | INIT_LIST_HEAD(&new_entrys); | |
78 | for (i = 0; i < bo_size/8; ++i) { | |
79 | struct radeon_semaphore *sem = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); | |
80 | ttm_bo_reference(&bo->tbo); | |
81 | sem->robj = bo; | |
82 | sem->gpu_addr = gpu_addr; | |
83 | gpu_addr += 8; | |
84 | list_add_tail(&sem->list, &new_entrys); | |
85 | } | |
86 | ||
87 | radeon_bo_unreserve(bo); | |
88 | radeon_bo_unref(&bo); | |
89 | ||
90 | write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); | |
91 | list_splice_tail(&new_entrys, &rdev->semaphore_drv.free); | |
92 | write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); | |
93 | ||
94 | DRM_INFO("%d new semaphores allocated\n", (int)(bo_size/8)); | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | int radeon_semaphore_create(struct radeon_device *rdev, | |
100 | struct radeon_semaphore **semaphore) | |
101 | { | |
102 | unsigned long irq_flags; | |
103 | ||
104 | write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); | |
105 | if (list_empty(&rdev->semaphore_drv.free)) { | |
106 | int r; | |
107 | write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); | |
108 | r = allocate_semaphores(rdev); | |
109 | if (r) | |
110 | return r; | |
111 | write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); | |
112 | } | |
113 | ||
114 | *semaphore = list_first_entry(&rdev->semaphore_drv.free, struct radeon_semaphore, list); | |
115 | list_del(&(*semaphore)->list); | |
116 | ||
117 | write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, | |
122 | struct radeon_semaphore *semaphore) | |
123 | { | |
4c87bc26 | 124 | radeon_semaphore_ring_emit(rdev, ring, &rdev->cp[ring], semaphore, false); |
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125 | } |
126 | ||
127 | void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, | |
128 | struct radeon_semaphore *semaphore) | |
129 | { | |
4c87bc26 | 130 | radeon_semaphore_ring_emit(rdev, ring, &rdev->cp[ring], semaphore, true); |
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131 | } |
132 | ||
133 | void radeon_semaphore_free(struct radeon_device *rdev, | |
134 | struct radeon_semaphore *semaphore) | |
135 | { | |
136 | unsigned long irq_flags; | |
137 | ||
138 | write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); | |
139 | list_add_tail(&semaphore->list, &rdev->semaphore_drv.free); | |
140 | write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); | |
141 | } | |
142 | ||
143 | void radeon_semaphore_driver_fini(struct radeon_device *rdev) | |
144 | { | |
145 | struct radeon_semaphore *i, *n; | |
146 | struct list_head entrys; | |
147 | unsigned long irq_flags; | |
148 | ||
149 | INIT_LIST_HEAD(&entrys); | |
150 | write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); | |
151 | if (!list_empty(&rdev->semaphore_drv.free)) { | |
152 | list_splice(&rdev->semaphore_drv.free, &entrys); | |
153 | } | |
154 | INIT_LIST_HEAD(&rdev->semaphore_drv.free); | |
155 | write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); | |
156 | ||
157 | list_for_each_entry_safe(i, n, &entrys, list) { | |
158 | radeon_bo_unref(&i->robj); | |
159 | kfree(i); | |
160 | } | |
161 | } |