1 /*
2 * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
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 "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sub license,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24 /*
25 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
26 */
27
28 #include <linux/slab.h>
29
30 #include <drm/drm_device.h>
31 #include <drm/drm_file.h>
32 #include <drm/drm_irq.h>
33 #include <drm/via_drm.h>
34
35 #include "via_drv.h"
36
37 #define VIA_MM_ALIGN_SHIFT 4
38 #define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
39
40 struct via_memblock {
41 struct drm_mm_node mm_node;
42 struct list_head owner_list;
43 };
44
via_agp_init(struct drm_device * dev,void * data,struct drm_file * file_priv)45 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
46 {
47 drm_via_agp_t *agp = data;
48 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
49
50 mutex_lock(&dev->struct_mutex);
51 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
52
53 dev_priv->agp_initialized = 1;
54 dev_priv->agp_offset = agp->offset;
55 mutex_unlock(&dev->struct_mutex);
56
57 DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
58 return 0;
59 }
60
via_fb_init(struct drm_device * dev,void * data,struct drm_file * file_priv)61 int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
62 {
63 drm_via_fb_t *fb = data;
64 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
65
66 mutex_lock(&dev->struct_mutex);
67 drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
68
69 dev_priv->vram_initialized = 1;
70 dev_priv->vram_offset = fb->offset;
71
72 mutex_unlock(&dev->struct_mutex);
73 DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
74
75 return 0;
76
77 }
78
via_final_context(struct drm_device * dev,int context)79 int via_final_context(struct drm_device *dev, int context)
80 {
81 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
82
83 via_release_futex(dev_priv, context);
84
85 /* Linux specific until context tracking code gets ported to BSD */
86 /* Last context, perform cleanup */
87 if (list_is_singular(&dev->ctxlist)) {
88 DRM_DEBUG("Last Context\n");
89 drm_irq_uninstall(dev);
90 via_cleanup_futex(dev_priv);
91 via_do_cleanup_map(dev);
92 }
93 return 1;
94 }
95
via_lastclose(struct drm_device * dev)96 void via_lastclose(struct drm_device *dev)
97 {
98 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
99
100 if (!dev_priv)
101 return;
102
103 mutex_lock(&dev->struct_mutex);
104 if (dev_priv->vram_initialized) {
105 drm_mm_takedown(&dev_priv->vram_mm);
106 dev_priv->vram_initialized = 0;
107 }
108 if (dev_priv->agp_initialized) {
109 drm_mm_takedown(&dev_priv->agp_mm);
110 dev_priv->agp_initialized = 0;
111 }
112 mutex_unlock(&dev->struct_mutex);
113 }
114
via_mem_alloc(struct drm_device * dev,void * data,struct drm_file * file)115 int via_mem_alloc(struct drm_device *dev, void *data,
116 struct drm_file *file)
117 {
118 drm_via_mem_t *mem = data;
119 int retval = 0, user_key;
120 struct via_memblock *item;
121 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
122 struct via_file_private *file_priv = file->driver_priv;
123 unsigned long tmpSize;
124
125 if (mem->type > VIA_MEM_AGP) {
126 DRM_ERROR("Unknown memory type allocation\n");
127 return -EINVAL;
128 }
129 mutex_lock(&dev->struct_mutex);
130 if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
131 dev_priv->agp_initialized)) {
132 DRM_ERROR
133 ("Attempt to allocate from uninitialized memory manager.\n");
134 mutex_unlock(&dev->struct_mutex);
135 return -EINVAL;
136 }
137
138 item = kzalloc(sizeof(*item), GFP_KERNEL);
139 if (!item) {
140 retval = -ENOMEM;
141 goto fail_alloc;
142 }
143
144 tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
145 if (mem->type == VIA_MEM_AGP)
146 retval = drm_mm_insert_node(&dev_priv->agp_mm,
147 &item->mm_node,
148 tmpSize);
149 else
150 retval = drm_mm_insert_node(&dev_priv->vram_mm,
151 &item->mm_node,
152 tmpSize);
153 if (retval)
154 goto fail_alloc;
155
156 retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
157 if (retval < 0)
158 goto fail_idr;
159 user_key = retval;
160
161 list_add(&item->owner_list, &file_priv->obj_list);
162 mutex_unlock(&dev->struct_mutex);
163
164 mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
165 dev_priv->vram_offset : dev_priv->agp_offset) +
166 ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
167 mem->index = user_key;
168
169 return 0;
170
171 fail_idr:
172 drm_mm_remove_node(&item->mm_node);
173 fail_alloc:
174 kfree(item);
175 mutex_unlock(&dev->struct_mutex);
176
177 mem->offset = 0;
178 mem->size = 0;
179 mem->index = 0;
180 DRM_DEBUG("Video memory allocation failed\n");
181
182 return retval;
183 }
184
via_mem_free(struct drm_device * dev,void * data,struct drm_file * file_priv)185 int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
186 {
187 drm_via_private_t *dev_priv = dev->dev_private;
188 drm_via_mem_t *mem = data;
189 struct via_memblock *obj;
190
191 mutex_lock(&dev->struct_mutex);
192 obj = idr_find(&dev_priv->object_idr, mem->index);
193 if (obj == NULL) {
194 mutex_unlock(&dev->struct_mutex);
195 return -EINVAL;
196 }
197
198 idr_remove(&dev_priv->object_idr, mem->index);
199 list_del(&obj->owner_list);
200 drm_mm_remove_node(&obj->mm_node);
201 kfree(obj);
202 mutex_unlock(&dev->struct_mutex);
203
204 DRM_DEBUG("free = 0x%lx\n", mem->index);
205
206 return 0;
207 }
208
209
via_reclaim_buffers_locked(struct drm_device * dev,struct drm_file * file)210 void via_reclaim_buffers_locked(struct drm_device *dev,
211 struct drm_file *file)
212 {
213 struct via_file_private *file_priv = file->driver_priv;
214 struct via_memblock *entry, *next;
215
216 if (!(dev->master && file->master->lock.hw_lock))
217 return;
218
219 drm_legacy_idlelock_take(&file->master->lock);
220
221 mutex_lock(&dev->struct_mutex);
222 if (list_empty(&file_priv->obj_list)) {
223 mutex_unlock(&dev->struct_mutex);
224 drm_legacy_idlelock_release(&file->master->lock);
225
226 return;
227 }
228
229 via_driver_dma_quiescent(dev);
230
231 list_for_each_entry_safe(entry, next, &file_priv->obj_list,
232 owner_list) {
233 list_del(&entry->owner_list);
234 drm_mm_remove_node(&entry->mm_node);
235 kfree(entry);
236 }
237 mutex_unlock(&dev->struct_mutex);
238
239 drm_legacy_idlelock_release(&file->master->lock);
240
241 return;
242 }
243