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 #include <video/sisfb.h>
39
40 #define VIDEO_TYPE 0
41 #define AGP_TYPE 1
42
43
44 struct sis_memblock {
45 struct drm_mm_node mm_node;
46 struct sis_memreq req;
47 struct list_head owner_list;
48 };
49
50 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
51 /* fb management via fb device */
52
53 #define SIS_MM_ALIGN_SHIFT 0
54 #define SIS_MM_ALIGN_MASK 0
55
56 #else /* CONFIG_FB_SIS[_MODULE] */
57
58 #define SIS_MM_ALIGN_SHIFT 4
59 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
60
61 #endif /* CONFIG_FB_SIS[_MODULE] */
62
sis_fb_init(struct drm_device * dev,void * data,struct drm_file * file_priv)63 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
64 {
65 drm_sis_private_t *dev_priv = dev->dev_private;
66 drm_sis_fb_t *fb = data;
67
68 mutex_lock(&dev->struct_mutex);
69 /* Unconditionally init the drm_mm, even though we don't use it when the
70 * fb sis driver is available - make cleanup easier. */
71 drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
72
73 dev_priv->vram_initialized = 1;
74 dev_priv->vram_offset = fb->offset;
75
76 mutex_unlock(&dev->struct_mutex);
77 DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
78
79 return 0;
80 }
81
sis_drm_alloc(struct drm_device * dev,struct drm_file * file,void * data,int pool)82 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
83 void *data, int pool)
84 {
85 drm_sis_private_t *dev_priv = dev->dev_private;
86 drm_sis_mem_t *mem = data;
87 int retval = 0, user_key;
88 struct sis_memblock *item;
89 struct sis_file_private *file_priv = file->driver_priv;
90 unsigned long offset;
91
92 mutex_lock(&dev->struct_mutex);
93
94 if (0 == ((pool == 0) ? dev_priv->vram_initialized :
95 dev_priv->agp_initialized)) {
96 DRM_ERROR
97 ("Attempt to allocate from uninitialized memory manager.\n");
98 mutex_unlock(&dev->struct_mutex);
99 return -EINVAL;
100 }
101
102 item = kzalloc(sizeof(*item), GFP_KERNEL);
103 if (!item) {
104 retval = -ENOMEM;
105 goto fail_alloc;
106 }
107
108 mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
109 if (pool == AGP_TYPE) {
110 retval = drm_mm_insert_node(&dev_priv->agp_mm,
111 &item->mm_node,
112 mem->size, 0);
113 offset = item->mm_node.start;
114 } else {
115 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
116 item->req.size = mem->size;
117 sis_malloc(&item->req);
118 if (item->req.size == 0)
119 retval = -ENOMEM;
120 offset = item->req.offset;
121 #else
122 retval = drm_mm_insert_node(&dev_priv->vram_mm,
123 &item->mm_node,
124 mem->size, 0);
125 offset = item->mm_node.start;
126 #endif
127 }
128 if (retval)
129 goto fail_alloc;
130
131 again:
132 if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
133 retval = -ENOMEM;
134 goto fail_idr;
135 }
136
137 retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
138 if (retval == -EAGAIN)
139 goto again;
140 if (retval)
141 goto fail_idr;
142
143 list_add(&item->owner_list, &file_priv->obj_list);
144 mutex_unlock(&dev->struct_mutex);
145
146 mem->offset = ((pool == 0) ?
147 dev_priv->vram_offset : dev_priv->agp_offset) +
148 (offset << SIS_MM_ALIGN_SHIFT);
149 mem->free = user_key;
150 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
151
152 return 0;
153
154 fail_idr:
155 drm_mm_remove_node(&item->mm_node);
156 fail_alloc:
157 kfree(item);
158 mutex_unlock(&dev->struct_mutex);
159
160 mem->offset = 0;
161 mem->size = 0;
162 mem->free = 0;
163
164 DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
165 mem->offset);
166
167 return retval;
168 }
169
sis_drm_free(struct drm_device * dev,void * data,struct drm_file * file_priv)170 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
171 {
172 drm_sis_private_t *dev_priv = dev->dev_private;
173 drm_sis_mem_t *mem = data;
174 struct sis_memblock *obj;
175
176 mutex_lock(&dev->struct_mutex);
177 obj = idr_find(&dev_priv->object_idr, mem->free);
178 if (obj == NULL) {
179 mutex_unlock(&dev->struct_mutex);
180 return -EINVAL;
181 }
182
183 idr_remove(&dev_priv->object_idr, mem->free);
184 list_del(&obj->owner_list);
185 if (drm_mm_node_allocated(&obj->mm_node))
186 drm_mm_remove_node(&obj->mm_node);
187 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
188 else
189 sis_free(obj->req.offset);
190 #endif
191 kfree(obj);
192 mutex_unlock(&dev->struct_mutex);
193 DRM_DEBUG("free = 0x%lx\n", mem->free);
194
195 return 0;
196 }
197
sis_fb_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)198 static int sis_fb_alloc(struct drm_device *dev, void *data,
199 struct drm_file *file_priv)
200 {
201 return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
202 }
203
sis_ioctl_agp_init(struct drm_device * dev,void * data,struct drm_file * file_priv)204 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
205 struct drm_file *file_priv)
206 {
207 drm_sis_private_t *dev_priv = dev->dev_private;
208 drm_sis_agp_t *agp = data;
209 dev_priv = dev->dev_private;
210
211 mutex_lock(&dev->struct_mutex);
212 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
213
214 dev_priv->agp_initialized = 1;
215 dev_priv->agp_offset = agp->offset;
216 mutex_unlock(&dev->struct_mutex);
217
218 DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
219 return 0;
220 }
221
sis_ioctl_agp_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)222 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
223 struct drm_file *file_priv)
224 {
225
226 return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
227 }
228
sis_reg_init(struct drm_device * dev)229 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
230 {
231 struct drm_map_list *entry;
232 drm_local_map_t *map;
233
234 list_for_each_entry(entry, &dev->maplist, head) {
235 map = entry->map;
236 if (!map)
237 continue;
238 if (map->type == _DRM_REGISTERS)
239 return map;
240 }
241 return NULL;
242 }
243
sis_idle(struct drm_device * dev)244 int sis_idle(struct drm_device *dev)
245 {
246 drm_sis_private_t *dev_priv = dev->dev_private;
247 uint32_t idle_reg;
248 unsigned long end;
249 int i;
250
251 if (dev_priv->idle_fault)
252 return 0;
253
254 if (dev_priv->mmio == NULL) {
255 dev_priv->mmio = sis_reg_init(dev);
256 if (dev_priv->mmio == NULL) {
257 DRM_ERROR("Could not find register map.\n");
258 return 0;
259 }
260 }
261
262 /*
263 * Implement a device switch here if needed
264 */
265
266 if (dev_priv->chipset != SIS_CHIP_315)
267 return 0;
268
269 /*
270 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
271 * because its polling frequency is too low.
272 */
273
274 end = jiffies + (DRM_HZ * 3);
275
276 for (i = 0; i < 4; ++i) {
277 do {
278 idle_reg = SIS_READ(0x85cc);
279 } while (!time_after_eq(jiffies, end) &&
280 ((idle_reg & 0x80000000) != 0x80000000));
281 }
282
283 if (time_after_eq(jiffies, end)) {
284 DRM_ERROR("Graphics engine idle timeout. "
285 "Disabling idle check\n");
286 dev_priv->idle_fault = 1;
287 }
288
289 /*
290 * The caller never sees an error code. It gets trapped
291 * in libdrm.
292 */
293
294 return 0;
295 }
296
297
sis_lastclose(struct drm_device * dev)298 void sis_lastclose(struct drm_device *dev)
299 {
300 drm_sis_private_t *dev_priv = dev->dev_private;
301
302 if (!dev_priv)
303 return;
304
305 mutex_lock(&dev->struct_mutex);
306 if (dev_priv->vram_initialized) {
307 drm_mm_takedown(&dev_priv->vram_mm);
308 dev_priv->vram_initialized = 0;
309 }
310 if (dev_priv->agp_initialized) {
311 drm_mm_takedown(&dev_priv->agp_mm);
312 dev_priv->agp_initialized = 0;
313 }
314 dev_priv->mmio = NULL;
315 mutex_unlock(&dev->struct_mutex);
316 }
317
sis_reclaim_buffers_locked(struct drm_device * dev,struct drm_file * file)318 void sis_reclaim_buffers_locked(struct drm_device *dev,
319 struct drm_file *file)
320 {
321 struct sis_file_private *file_priv = file->driver_priv;
322 struct sis_memblock *entry, *next;
323
324 mutex_lock(&dev->struct_mutex);
325 if (list_empty(&file_priv->obj_list)) {
326 mutex_unlock(&dev->struct_mutex);
327 return;
328 }
329
330 if (dev->driver->dma_quiescent)
331 dev->driver->dma_quiescent(dev);
332
333
334 list_for_each_entry_safe(entry, next, &file_priv->obj_list,
335 owner_list) {
336 list_del(&entry->owner_list);
337 if (drm_mm_node_allocated(&entry->mm_node))
338 drm_mm_remove_node(&entry->mm_node);
339 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
340 else
341 sis_free(entry->req.offset);
342 #endif
343 kfree(entry);
344 }
345 mutex_unlock(&dev->struct_mutex);
346 return;
347 }
348
349 struct drm_ioctl_desc sis_ioctls[] = {
350 DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
351 DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
352 DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
353 DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
354 DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
355 DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
356 };
357
358 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
359