Commit | Line | Data |
---|---|---|
45b2fda3 | 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 | ||
2d1a8a48 | 36 | #include <linux/export.h> |
625c18d7 | 37 | #include <linux/pci.h> |
0500c04e SR |
38 | |
39 | #include <drm/drm_drv.h> | |
0500c04e SR |
40 | #include <drm/drm_print.h> |
41 | ||
ba8286fa | 42 | #include "drm_legacy.h" |
1da177e4 LT |
43 | |
44 | /** | |
4e0311db | 45 | * drm_legacy_dma_setup() - Initialize the DMA data. |
b5e89ed5 | 46 | * |
4e0311db BG |
47 | * @dev: DRM device. |
48 | * Return: zero on success or a negative value on failure. | |
1da177e4 LT |
49 | * |
50 | * Allocate and initialize a drm_device_dma structure. | |
51 | */ | |
e2e99a82 | 52 | int drm_legacy_dma_setup(struct drm_device *dev) |
1da177e4 LT |
53 | { |
54 | int i; | |
55 | ||
e2e99a82 | 56 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) || |
fa538645 | 57 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
e2e99a82 | 58 | return 0; |
e2e99a82 DV |
59 | |
60 | dev->buf_use = 0; | |
61 | atomic_set(&dev->buf_alloc, 0); | |
62 | ||
6ebc22e6 | 63 | dev->dma = kzalloc(sizeof(*dev->dma), GFP_KERNEL); |
b5e89ed5 | 64 | if (!dev->dma) |
1da177e4 LT |
65 | return -ENOMEM; |
66 | ||
b5e89ed5 | 67 | for (i = 0; i <= DRM_MAX_ORDER; i++) |
1da177e4 LT |
68 | memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0])); |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | /** | |
4e0311db | 74 | * drm_legacy_dma_takedown() - Cleanup the DMA resources. |
1da177e4 | 75 | * |
4e0311db | 76 | * @dev: DRM device. |
1da177e4 LT |
77 | * |
78 | * Free all pages associated with DMA buffers, the buffers and pages lists, and | |
59c51591 | 79 | * finally the drm_device::dma structure itself. |
1da177e4 | 80 | */ |
e2e99a82 | 81 | void drm_legacy_dma_takedown(struct drm_device *dev) |
1da177e4 | 82 | { |
cdd55a29 | 83 | struct drm_device_dma *dma = dev->dma; |
70556e24 | 84 | drm_dma_handle_t *dmah; |
b5e89ed5 | 85 | int i, j; |
1da177e4 | 86 | |
e2e99a82 | 87 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) || |
fa538645 | 88 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
e2e99a82 | 89 | return; |
e2e99a82 | 90 | |
b5e89ed5 DA |
91 | if (!dma) |
92 | return; | |
1da177e4 | 93 | |
b5e89ed5 | 94 | /* Clear dma buffers */ |
1da177e4 LT |
95 | for (i = 0; i <= DRM_MAX_ORDER; i++) { |
96 | if (dma->bufs[i].seg_count) { | |
97 | DRM_DEBUG("order %d: buf_count = %d," | |
98 | " seg_count = %d\n", | |
99 | i, | |
100 | dma->bufs[i].buf_count, | |
101 | dma->bufs[i].seg_count); | |
102 | for (j = 0; j < dma->bufs[i].seg_count; j++) { | |
103 | if (dma->bufs[i].seglist[j]) { | |
70556e24 JK |
104 | dmah = dma->bufs[i].seglist[j]; |
105 | dma_free_coherent(dev->dev, | |
106 | dmah->size, | |
107 | dmah->vaddr, | |
108 | dmah->busaddr); | |
109 | kfree(dmah); | |
1da177e4 LT |
110 | } |
111 | } | |
9a298b2a | 112 | kfree(dma->bufs[i].seglist); |
1da177e4 | 113 | } |
b5e89ed5 DA |
114 | if (dma->bufs[i].buf_count) { |
115 | for (j = 0; j < dma->bufs[i].buf_count; j++) { | |
9a298b2a | 116 | kfree(dma->bufs[i].buflist[j].dev_private); |
1da177e4 | 117 | } |
9a298b2a | 118 | kfree(dma->bufs[i].buflist); |
1da177e4 LT |
119 | } |
120 | } | |
121 | ||
9a298b2a EA |
122 | kfree(dma->buflist); |
123 | kfree(dma->pagelist); | |
124 | kfree(dev->dma); | |
1da177e4 LT |
125 | dev->dma = NULL; |
126 | } | |
127 | ||
1da177e4 | 128 | /** |
4e0311db | 129 | * drm_legacy_free_buffer() - Free a buffer. |
1da177e4 | 130 | * |
4e0311db BG |
131 | * @dev: DRM device. |
132 | * @buf: buffer to free. | |
b5e89ed5 | 133 | * |
1da177e4 LT |
134 | * Resets the fields of \p buf. |
135 | */ | |
a266162a | 136 | void drm_legacy_free_buffer(struct drm_device *dev, struct drm_buf * buf) |
1da177e4 | 137 | { |
b5e89ed5 DA |
138 | if (!buf) |
139 | return; | |
1da177e4 | 140 | |
b5e89ed5 DA |
141 | buf->waiting = 0; |
142 | buf->pending = 0; | |
6c340eac | 143 | buf->file_priv = NULL; |
b5e89ed5 | 144 | buf->used = 0; |
1da177e4 LT |
145 | } |
146 | ||
147 | /** | |
4e0311db | 148 | * drm_legacy_reclaim_buffers() - Reclaim the buffers. |
1da177e4 | 149 | * |
4e0311db BG |
150 | * @dev: DRM device. |
151 | * @file_priv: DRM file private. | |
1da177e4 | 152 | * |
6c340eac | 153 | * Frees each buffer associated with \p file_priv not already on the hardware. |
1da177e4 | 154 | */ |
a266162a DV |
155 | void drm_legacy_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: | |
a266162a | 167 | drm_legacy_free_buffer(dev, dma->buflist[i]); |
1da177e4 LT |
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 | } |