random: remove cacheline alignment for locks
[linux-2.6] / drivers / char / drm / sis_mm.c
1 /**************************************************************************
2  *
3  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
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11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  *
27  **************************************************************************/
28
29 /*
30  * Authors:
31  *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
32  */
33
34 #include "drmP.h"
35 #include "sis_drm.h"
36 #include "sis_drv.h"
37
38 #include <video/sisfb.h>
39
40 #define VIDEO_TYPE 0
41 #define AGP_TYPE 1
42
43
44 #if defined(CONFIG_FB_SIS)
45 /* fb management via fb device */
46
47 #define SIS_MM_ALIGN_SHIFT 0
48 #define SIS_MM_ALIGN_MASK 0
49
50 static void *sis_sman_mm_allocate(void *private, unsigned long size,
51                                   unsigned alignment)
52 {
53         struct sis_memreq req;
54
55         req.size = size;
56         sis_malloc(&req);
57         if (req.size == 0)
58                 return NULL;
59         else
60                 return (void *)~req.offset;
61 }
62
63 static void sis_sman_mm_free(void *private, void *ref)
64 {
65         sis_free(~((unsigned long)ref));
66 }
67
68 static void sis_sman_mm_destroy(void *private)
69 {
70         ;
71 }
72
73 static unsigned long sis_sman_mm_offset(void *private, void *ref)
74 {
75         return ~((unsigned long)ref);
76 }
77
78 #else /* CONFIG_FB_SIS */
79
80 #define SIS_MM_ALIGN_SHIFT 4
81 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
82
83 #endif /* CONFIG_FB_SIS */
84
85 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
86 {
87         drm_sis_private_t *dev_priv = dev->dev_private;
88         drm_sis_fb_t *fb = data;
89         int ret;
90
91         mutex_lock(&dev->struct_mutex);
92 #if defined(CONFIG_FB_SIS)
93         {
94                 struct drm_sman_mm sman_mm;
95                 sman_mm.private = (void *)0xFFFFFFFF;
96                 sman_mm.allocate = sis_sman_mm_allocate;
97                 sman_mm.free = sis_sman_mm_free;
98                 sman_mm.destroy = sis_sman_mm_destroy;
99                 sman_mm.offset = sis_sman_mm_offset;
100                 ret =
101                     drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
102         }
103 #else
104         ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
105                                  fb->size >> SIS_MM_ALIGN_SHIFT);
106 #endif
107
108         if (ret) {
109                 DRM_ERROR("VRAM memory manager initialisation error\n");
110                 mutex_unlock(&dev->struct_mutex);
111                 return ret;
112         }
113
114         dev_priv->vram_initialized = 1;
115         dev_priv->vram_offset = fb->offset;
116
117         mutex_unlock(&dev->struct_mutex);
118         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
119
120         return 0;
121 }
122
123 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
124                          void *data, int pool)
125 {
126         drm_sis_private_t *dev_priv = dev->dev_private;
127         drm_sis_mem_t *mem = data;
128         int retval = 0;
129         struct drm_memblock_item *item;
130
131         mutex_lock(&dev->struct_mutex);
132
133         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
134                       dev_priv->agp_initialized)) {
135                 DRM_ERROR
136                     ("Attempt to allocate from uninitialized memory manager.\n");
137                 mutex_unlock(&dev->struct_mutex);
138                 return -EINVAL;
139         }
140
141         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
142         item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
143                               (unsigned long)file_priv);
144
145         mutex_unlock(&dev->struct_mutex);
146         if (item) {
147                 mem->offset = ((pool == 0) ?
148                               dev_priv->vram_offset : dev_priv->agp_offset) +
149                     (item->mm->
150                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
151                 mem->free = item->user_hash.key;
152                 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
153         } else {
154                 mem->offset = 0;
155                 mem->size = 0;
156                 mem->free = 0;
157                 retval = -ENOMEM;
158         }
159
160         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
161                   mem->offset);
162
163         return retval;
164 }
165
166 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
167 {
168         drm_sis_private_t *dev_priv = dev->dev_private;
169         drm_sis_mem_t *mem = data;
170         int ret;
171
172         mutex_lock(&dev->struct_mutex);
173         ret = drm_sman_free_key(&dev_priv->sman, mem->free);
174         mutex_unlock(&dev->struct_mutex);
175         DRM_DEBUG("free = 0x%lx\n", mem->free);
176
177         return ret;
178 }
179
180 static int sis_fb_alloc(struct drm_device *dev, void *data,
181                         struct drm_file *file_priv)
182 {
183         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
184 }
185
186 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
187                               struct drm_file *file_priv)
188 {
189         drm_sis_private_t *dev_priv = dev->dev_private;
190         drm_sis_agp_t *agp = data;
191         int ret;
192         dev_priv = dev->dev_private;
193
194         mutex_lock(&dev->struct_mutex);
195         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
196                                  agp->size >> SIS_MM_ALIGN_SHIFT);
197
198         if (ret) {
199                 DRM_ERROR("AGP memory manager initialisation error\n");
200                 mutex_unlock(&dev->struct_mutex);
201                 return ret;
202         }
203
204         dev_priv->agp_initialized = 1;
205         dev_priv->agp_offset = agp->offset;
206         mutex_unlock(&dev->struct_mutex);
207
208         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
209         return 0;
210 }
211
212 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
213                                struct drm_file *file_priv)
214 {
215
216         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
217 }
218
219 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
220 {
221         struct drm_map_list *entry;
222         drm_local_map_t *map;
223
224         list_for_each_entry(entry, &dev->maplist, head) {
225                 map = entry->map;
226                 if (!map)
227                         continue;
228                 if (map->type == _DRM_REGISTERS) {
229                         return map;
230                 }
231         }
232         return NULL;
233 }
234
235 int sis_idle(struct drm_device *dev)
236 {
237         drm_sis_private_t *dev_priv = dev->dev_private;
238         uint32_t idle_reg;
239         unsigned long end;
240         int i;
241
242         if (dev_priv->idle_fault)
243                 return 0;
244
245         if (dev_priv->mmio == NULL) {
246                 dev_priv->mmio = sis_reg_init(dev);
247                 if (dev_priv->mmio == NULL) {
248                         DRM_ERROR("Could not find register map.\n");
249                         return 0;
250                 }
251         }
252
253         /*
254          * Implement a device switch here if needed
255          */
256
257         if (dev_priv->chipset != SIS_CHIP_315)
258                 return 0;
259
260         /*
261          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
262          * because its polling frequency is too low.
263          */
264
265         end = jiffies + (DRM_HZ * 3);
266
267         for (i=0; i<4; ++i) {
268                 do {
269                         idle_reg = SIS_READ(0x85cc);
270                 } while ( !time_after_eq(jiffies, end) &&
271                           ((idle_reg & 0x80000000) != 0x80000000));
272         }
273
274         if (time_after_eq(jiffies, end)) {
275                 DRM_ERROR("Graphics engine idle timeout. "
276                           "Disabling idle check\n");
277                 dev_priv->idle_fault = 1;
278         }
279
280         /*
281          * The caller never sees an error code. It gets trapped
282          * in libdrm.
283          */
284
285         return 0;
286 }
287
288
289 void sis_lastclose(struct drm_device *dev)
290 {
291         drm_sis_private_t *dev_priv = dev->dev_private;
292
293         if (!dev_priv)
294                 return;
295
296         mutex_lock(&dev->struct_mutex);
297         drm_sman_cleanup(&dev_priv->sman);
298         dev_priv->vram_initialized = 0;
299         dev_priv->agp_initialized = 0;
300         dev_priv->mmio = NULL;
301         mutex_unlock(&dev->struct_mutex);
302 }
303
304 void sis_reclaim_buffers_locked(struct drm_device * dev,
305                                 struct drm_file *file_priv)
306 {
307         drm_sis_private_t *dev_priv = dev->dev_private;
308
309         mutex_lock(&dev->struct_mutex);
310         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
311                 mutex_unlock(&dev->struct_mutex);
312                 return;
313         }
314
315         if (dev->driver->dma_quiescent) {
316                 dev->driver->dma_quiescent(dev);
317         }
318
319         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
320         mutex_unlock(&dev->struct_mutex);
321         return;
322 }
323
324 struct drm_ioctl_desc sis_ioctls[] = {
325         DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
326         DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_drm_free, DRM_AUTH),
327         DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
328         DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
329         DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
330         DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
331 };
332
333 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);