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 <drm/drmP.h>
35 #include <drm/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 = %lu, size = %lu\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 DRM_MM_SEARCH_DEFAULT);
114 offset = item->mm_node.start;
115 } else {
116 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
117 item->req.size = mem->size;
118 sis_malloc(&item->req);
119 if (item->req.size == 0)
120 retval = -ENOMEM;
121 offset = item->req.offset;
122 #else
123 retval = drm_mm_insert_node(&dev_priv->vram_mm,
124 &item->mm_node,
125 mem->size, 0,
126 DRM_MM_SEARCH_DEFAULT);
127 offset = item->mm_node.start;
128 #endif
129 }
130 if (retval)
131 goto fail_alloc;
132
133 retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
134 if (retval < 0)
135 goto fail_idr;
136 user_key = retval;
137
138 list_add(&item->owner_list, &file_priv->obj_list);
139 mutex_unlock(&dev->struct_mutex);
140
141 mem->offset = ((pool == 0) ?
142 dev_priv->vram_offset : dev_priv->agp_offset) +
143 (offset << SIS_MM_ALIGN_SHIFT);
144 mem->free = user_key;
145 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
146
147 return 0;
148
149 fail_idr:
150 drm_mm_remove_node(&item->mm_node);
151 fail_alloc:
152 kfree(item);
153 mutex_unlock(&dev->struct_mutex);
154
155 mem->offset = 0;
156 mem->size = 0;
157 mem->free = 0;
158
159 DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
160 mem->offset);
161
162 return retval;
163 }
164
sis_drm_free(struct drm_device * dev,void * data,struct drm_file * file_priv)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 struct sis_memblock *obj;
170
171 mutex_lock(&dev->struct_mutex);
172 obj = idr_find(&dev_priv->object_idr, mem->free);
173 if (obj == NULL) {
174 mutex_unlock(&dev->struct_mutex);
175 return -EINVAL;
176 }
177
178 idr_remove(&dev_priv->object_idr, mem->free);
179 list_del(&obj->owner_list);
180 if (drm_mm_node_allocated(&obj->mm_node))
181 drm_mm_remove_node(&obj->mm_node);
182 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
183 else
184 sis_free(obj->req.offset);
185 #endif
186 kfree(obj);
187 mutex_unlock(&dev->struct_mutex);
188 DRM_DEBUG("free = 0x%lx\n", mem->free);
189
190 return 0;
191 }
192
sis_fb_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)193 static int sis_fb_alloc(struct drm_device *dev, void *data,
194 struct drm_file *file_priv)
195 {
196 return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
197 }
198
sis_ioctl_agp_init(struct drm_device * dev,void * data,struct drm_file * file_priv)199 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
200 struct drm_file *file_priv)
201 {
202 drm_sis_private_t *dev_priv = dev->dev_private;
203 drm_sis_agp_t *agp = data;
204 dev_priv = dev->dev_private;
205
206 mutex_lock(&dev->struct_mutex);
207 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
208
209 dev_priv->agp_initialized = 1;
210 dev_priv->agp_offset = agp->offset;
211 mutex_unlock(&dev->struct_mutex);
212
213 DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
214 return 0;
215 }
216
sis_ioctl_agp_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)217 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
218 struct drm_file *file_priv)
219 {
220
221 return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
222 }
223
sis_reg_init(struct drm_device * dev)224 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
225 {
226 struct drm_map_list *entry;
227 drm_local_map_t *map;
228
229 list_for_each_entry(entry, &dev->maplist, head) {
230 map = entry->map;
231 if (!map)
232 continue;
233 if (map->type == _DRM_REGISTERS)
234 return map;
235 }
236 return NULL;
237 }
238
sis_idle(struct drm_device * dev)239 int sis_idle(struct drm_device *dev)
240 {
241 drm_sis_private_t *dev_priv = dev->dev_private;
242 uint32_t idle_reg;
243 unsigned long end;
244 int i;
245
246 if (dev_priv->idle_fault)
247 return 0;
248
249 if (dev_priv->mmio == NULL) {
250 dev_priv->mmio = sis_reg_init(dev);
251 if (dev_priv->mmio == NULL) {
252 DRM_ERROR("Could not find register map.\n");
253 return 0;
254 }
255 }
256
257 /*
258 * Implement a device switch here if needed
259 */
260
261 if (dev_priv->chipset != SIS_CHIP_315)
262 return 0;
263
264 /*
265 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
266 * because its polling frequency is too low.
267 */
268
269 end = jiffies + (HZ * 3);
270
271 for (i = 0; i < 4; ++i) {
272 do {
273 idle_reg = SIS_READ(0x85cc);
274 } while (!time_after_eq(jiffies, end) &&
275 ((idle_reg & 0x80000000) != 0x80000000));
276 }
277
278 if (time_after_eq(jiffies, end)) {
279 DRM_ERROR("Graphics engine idle timeout. "
280 "Disabling idle check\n");
281 dev_priv->idle_fault = 1;
282 }
283
284 /*
285 * The caller never sees an error code. It gets trapped
286 * in libdrm.
287 */
288
289 return 0;
290 }
291
292
sis_lastclose(struct drm_device * dev)293 void sis_lastclose(struct drm_device *dev)
294 {
295 drm_sis_private_t *dev_priv = dev->dev_private;
296
297 if (!dev_priv)
298 return;
299
300 mutex_lock(&dev->struct_mutex);
301 if (dev_priv->vram_initialized) {
302 drm_mm_takedown(&dev_priv->vram_mm);
303 dev_priv->vram_initialized = 0;
304 }
305 if (dev_priv->agp_initialized) {
306 drm_mm_takedown(&dev_priv->agp_mm);
307 dev_priv->agp_initialized = 0;
308 }
309 dev_priv->mmio = NULL;
310 mutex_unlock(&dev->struct_mutex);
311 }
312
sis_reclaim_buffers_locked(struct drm_device * dev,struct drm_file * file)313 void sis_reclaim_buffers_locked(struct drm_device *dev,
314 struct drm_file *file)
315 {
316 struct sis_file_private *file_priv = file->driver_priv;
317 struct sis_memblock *entry, *next;
318
319 if (!(dev->master && file->master->lock.hw_lock))
320 return;
321
322 drm_legacy_idlelock_take(&file->master->lock);
323
324 mutex_lock(&dev->struct_mutex);
325 if (list_empty(&file_priv->obj_list)) {
326 mutex_unlock(&dev->struct_mutex);
327 drm_legacy_idlelock_release(&file->master->lock);
328
329 return;
330 }
331
332 sis_idle(dev);
333
334
335 list_for_each_entry_safe(entry, next, &file_priv->obj_list,
336 owner_list) {
337 list_del(&entry->owner_list);
338 if (drm_mm_node_allocated(&entry->mm_node))
339 drm_mm_remove_node(&entry->mm_node);
340 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
341 else
342 sis_free(entry->req.offset);
343 #endif
344 kfree(entry);
345 }
346 mutex_unlock(&dev->struct_mutex);
347
348 drm_legacy_idlelock_release(&file->master->lock);
349
350 return;
351 }
352
353 const struct drm_ioctl_desc sis_ioctls[] = {
354 DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
355 DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
356 DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
357 DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
358 DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
359 DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
360 };
361
362 int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
363