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1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_dma.c |
1da177e4 LT |
3 | * DMA IOCTL and function support |
4 | * | |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> | |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include "drmP.h" | |
37 | ||
38 | /** | |
39 | * Initialize the DMA data. | |
b5e89ed5 | 40 | * |
1da177e4 LT |
41 | * \param dev DRM device. |
42 | * \return zero on success or a negative value on failure. | |
43 | * | |
44 | * Allocate and initialize a drm_device_dma structure. | |
45 | */ | |
84b1fd10 | 46 | int drm_dma_setup(struct drm_device *dev) |
1da177e4 LT |
47 | { |
48 | int i; | |
49 | ||
b5e89ed5 DA |
50 | dev->dma = drm_alloc(sizeof(*dev->dma), DRM_MEM_DRIVER); |
51 | if (!dev->dma) | |
1da177e4 LT |
52 | return -ENOMEM; |
53 | ||
b5e89ed5 | 54 | memset(dev->dma, 0, sizeof(*dev->dma)); |
1da177e4 | 55 | |
b5e89ed5 | 56 | for (i = 0; i <= DRM_MAX_ORDER; i++) |
1da177e4 LT |
57 | memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0])); |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | /** | |
63 | * Cleanup the DMA resources. | |
64 | * | |
65 | * \param dev DRM device. | |
66 | * | |
67 | * Free all pages associated with DMA buffers, the buffers and pages lists, and | |
59c51591 | 68 | * finally the drm_device::dma structure itself. |
1da177e4 | 69 | */ |
84b1fd10 | 70 | void drm_dma_takedown(struct drm_device *dev) |
1da177e4 | 71 | { |
cdd55a29 | 72 | struct drm_device_dma *dma = dev->dma; |
b5e89ed5 | 73 | int i, j; |
1da177e4 | 74 | |
b5e89ed5 DA |
75 | if (!dma) |
76 | return; | |
1da177e4 | 77 | |
b5e89ed5 | 78 | /* Clear dma buffers */ |
1da177e4 LT |
79 | for (i = 0; i <= DRM_MAX_ORDER; i++) { |
80 | if (dma->bufs[i].seg_count) { | |
81 | DRM_DEBUG("order %d: buf_count = %d," | |
82 | " seg_count = %d\n", | |
83 | i, | |
84 | dma->bufs[i].buf_count, | |
85 | dma->bufs[i].seg_count); | |
86 | for (j = 0; j < dma->bufs[i].seg_count; j++) { | |
87 | if (dma->bufs[i].seglist[j]) { | |
ddf19b97 | 88 | drm_pci_free(dev, dma->bufs[i].seglist[j]); |
1da177e4 LT |
89 | } |
90 | } | |
91 | drm_free(dma->bufs[i].seglist, | |
b5e89ed5 DA |
92 | dma->bufs[i].seg_count |
93 | * sizeof(*dma->bufs[0].seglist), DRM_MEM_SEGS); | |
1da177e4 | 94 | } |
b5e89ed5 DA |
95 | if (dma->bufs[i].buf_count) { |
96 | for (j = 0; j < dma->bufs[i].buf_count; j++) { | |
1da177e4 | 97 | if (dma->bufs[i].buflist[j].dev_private) { |
b5e89ed5 DA |
98 | drm_free(dma->bufs[i].buflist[j]. |
99 | dev_private, | |
100 | dma->bufs[i].buflist[j]. | |
101 | dev_priv_size, DRM_MEM_BUFS); | |
1da177e4 LT |
102 | } |
103 | } | |
b5e89ed5 DA |
104 | drm_free(dma->bufs[i].buflist, |
105 | dma->bufs[i].buf_count * | |
106 | sizeof(*dma->bufs[0].buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
107 | } |
108 | } | |
109 | ||
110 | if (dma->buflist) { | |
111 | drm_free(dma->buflist, | |
b5e89ed5 | 112 | dma->buf_count * sizeof(*dma->buflist), DRM_MEM_BUFS); |
1da177e4 LT |
113 | } |
114 | ||
115 | if (dma->pagelist) { | |
116 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
117 | dma->page_count * sizeof(*dma->pagelist), |
118 | DRM_MEM_PAGES); | |
1da177e4 LT |
119 | } |
120 | drm_free(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER); | |
121 | dev->dma = NULL; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /** |
125 | * Free a buffer. | |
126 | * | |
127 | * \param dev DRM device. | |
128 | * \param buf buffer to free. | |
b5e89ed5 | 129 | * |
1da177e4 LT |
130 | * Resets the fields of \p buf. |
131 | */ | |
056219e2 | 132 | void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf) |
1da177e4 | 133 | { |
b5e89ed5 DA |
134 | if (!buf) |
135 | return; | |
1da177e4 | 136 | |
b5e89ed5 DA |
137 | buf->waiting = 0; |
138 | buf->pending = 0; | |
6c340eac | 139 | buf->file_priv = NULL; |
b5e89ed5 | 140 | buf->used = 0; |
1da177e4 | 141 | |
b5e89ed5 DA |
142 | if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) |
143 | && waitqueue_active(&buf->dma_wait)) { | |
1da177e4 LT |
144 | wake_up_interruptible(&buf->dma_wait); |
145 | } | |
146 | } | |
147 | ||
148 | /** | |
149 | * Reclaim the buffers. | |
150 | * | |
6c340eac | 151 | * \param file_priv DRM file private. |
1da177e4 | 152 | * |
6c340eac | 153 | * Frees each buffer associated with \p file_priv not already on the hardware. |
1da177e4 | 154 | */ |
6c340eac EA |
155 | void drm_core_reclaim_buffers(struct drm_device *dev, |
156 | struct drm_file *file_priv) | |
1da177e4 | 157 | { |
cdd55a29 | 158 | struct drm_device_dma *dma = dev->dma; |
b5e89ed5 | 159 | int i; |
1da177e4 | 160 | |
b5e89ed5 DA |
161 | if (!dma) |
162 | return; | |
1da177e4 | 163 | for (i = 0; i < dma->buf_count; i++) { |
6c340eac | 164 | if (dma->buflist[i]->file_priv == file_priv) { |
1da177e4 LT |
165 | switch (dma->buflist[i]->list) { |
166 | case DRM_LIST_NONE: | |
167 | drm_free_buffer(dev, dma->buflist[i]); | |
168 | break; | |
169 | case DRM_LIST_WAIT: | |
170 | dma->buflist[i]->list = DRM_LIST_RECLAIM; | |
171 | break; | |
172 | default: | |
173 | /* Buffer already on hardware. */ | |
174 | break; | |
175 | } | |
176 | } | |
177 | } | |
178 | } | |
1da177e4 | 179 | |
b5e89ed5 | 180 | EXPORT_SYMBOL(drm_core_reclaim_buffers); |