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Merge branch 'master' into modesetting-101
[android-x86/external-libdrm.git] / linux-core / 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,
10  * distribute, sub license, and/or sell copies of the Software, and to
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 #if defined(__linux__)
39 #include <video/sisfb.h>
40 #endif
41
42 #define VIDEO_TYPE 0
43 #define AGP_TYPE 1
44
45 #define SIS_MM_ALIGN_SHIFT 4
46 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
47
48 #if defined(__linux__) && defined(CONFIG_FB_SIS)
49 /* fb management via fb device */
50
51 #define SIS_MM_ALIGN_SHIFT 0
52 #define SIS_MM_ALIGN_MASK 0
53
54 static void *sis_sman_mm_allocate(void *private, unsigned long size,
55                                   unsigned alignment)
56 {
57         struct sis_memreq req;
58
59         req.size = size;
60         sis_malloc(&req);
61         if (req.size == 0)
62                 return NULL;
63         else
64                 return (void *)~req.offset;
65 }
66
67 static void sis_sman_mm_free(void *private, void *ref)
68 {
69         sis_free(~((unsigned long)ref));
70 }
71
72 static void sis_sman_mm_destroy(void *private)
73 {
74         ;
75 }
76
77 unsigned long sis_sman_mm_offset(void *private, void *ref)
78 {
79         return ~((unsigned long)ref);
80 }
81
82 #endif
83
84 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
85 {
86         drm_sis_private_t *dev_priv = dev->dev_private;
87         drm_sis_fb_t *fb = data;
88         int ret;
89
90         mutex_lock(&dev->struct_mutex);
91 #if defined(__linux__) && defined(CONFIG_FB_SIS)
92         {
93                 struct drm_sman_mm sman_mm;
94                 sman_mm.private = (void *)0xFFFFFFFF;
95                 sman_mm.allocate = sis_sman_mm_allocate;
96                 sman_mm.free = sis_sman_mm_free;
97                 sman_mm.destroy = sis_sman_mm_destroy;
98                 sman_mm.offset = sis_sman_mm_offset;
99                 ret =
100                     drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
101         }
102 #else
103         ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
104                                  fb->size >> SIS_MM_ALIGN_SHIFT);
105 #endif
106
107         if (ret) {
108                 DRM_ERROR("VRAM memory manager initialisation error\n");
109                 mutex_unlock(&dev->struct_mutex);
110                 return ret;
111         }
112
113         dev_priv->vram_initialized = 1;
114         dev_priv->vram_offset = fb->offset;
115
116         mutex_unlock(&dev->struct_mutex);
117         DRM_DEBUG("offset = %u, size = %u", fb->offset, fb->size);
118
119         return 0;
120 }
121
122 static int sis_drm_alloc(struct drm_device * dev, struct drm_file *file_priv,
123                          void *data, int pool)
124 {
125         drm_sis_private_t *dev_priv = dev->dev_private;
126         drm_sis_mem_t *mem = data;
127         int retval = 0;
128         struct drm_memblock_item *item;
129
130         mutex_lock(&dev->struct_mutex);
131
132         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
133                       dev_priv->agp_initialized)) {
134                 DRM_ERROR
135                     ("Attempt to allocate from uninitialized memory manager.\n");
136                 mutex_unlock(&dev->struct_mutex);
137                 return -EINVAL;
138         }
139
140         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
141         item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
142                               (unsigned long)file_priv);
143
144         mutex_unlock(&dev->struct_mutex);
145         if (item) {
146                 mem->offset = ((pool == 0) ?
147                               dev_priv->vram_offset : dev_priv->agp_offset) +
148                     (item->mm->
149                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
150                 mem->free = item->user_hash.key;
151                 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
152         } else {
153                 mem->offset = 0;
154                 mem->size = 0;
155                 mem->free = 0;
156                 retval = -ENOMEM;
157         }
158
159         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
160                   mem->offset);
161
162         return retval;
163 }
164
165 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
166 {
167         drm_sis_private_t *dev_priv = dev->dev_private;
168         drm_sis_mem_t *mem = data;
169         int ret;
170
171         mutex_lock(&dev->struct_mutex);
172         ret = drm_sman_free_key(&dev_priv->sman, mem->free);
173         mutex_unlock(&dev->struct_mutex);
174         DRM_DEBUG("free = 0x%lx\n", mem->free);
175
176         return ret;
177 }
178
179 static int sis_fb_alloc(struct drm_device *dev, void *data,
180                         struct drm_file *file_priv)
181 {
182         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
183 }
184
185 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
186                               struct drm_file *file_priv)
187 {
188         drm_sis_private_t *dev_priv = dev->dev_private;
189         drm_sis_agp_t *agp = data;
190         int ret;
191         dev_priv = dev->dev_private;
192
193         mutex_lock(&dev->struct_mutex);
194         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
195                                  agp->size >> SIS_MM_ALIGN_SHIFT);
196
197         if (ret) {
198                 DRM_ERROR("AGP memory manager initialisation error\n");
199                 mutex_unlock(&dev->struct_mutex);
200                 return ret;
201         }
202
203         dev_priv->agp_initialized = 1;
204         dev_priv->agp_offset = agp->offset;
205         mutex_unlock(&dev->struct_mutex);
206
207         DRM_DEBUG("offset = %u, size = %u", agp->offset, agp->size);
208         return 0;
209 }
210
211 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
212                                struct drm_file *file_priv)
213 {
214
215         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
216 }
217
218 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
219 {
220         struct drm_map_list *entry;
221         drm_local_map_t *map;
222
223         list_for_each_entry(entry, &dev->maplist, head) {
224                 map = entry->map;
225                 if (!map)
226                         continue;
227                 if (map->type == _DRM_REGISTERS) {
228                         return map;
229                 }
230         }
231         return NULL;
232 }
233
234 int
235 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);