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);
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);
125 offset = item->mm_node.start;
126 #endif
127 }
128 if (retval)
129 goto fail_alloc;
130
131 retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
132 if (retval < 0)
133 goto fail_idr;
134 user_key = retval;
135
136 list_add(&item->owner_list, &file_priv->obj_list);
137 mutex_unlock(&dev->struct_mutex);
138
139 mem->offset = ((pool == 0) ?
140 dev_priv->vram_offset : dev_priv->agp_offset) +
141 (offset << SIS_MM_ALIGN_SHIFT);
142 mem->free = user_key;
143 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
144
145 return 0;
146
147 fail_idr:
148 drm_mm_remove_node(&item->mm_node);
149 fail_alloc:
150 kfree(item);
151 mutex_unlock(&dev->struct_mutex);
152
153 mem->offset = 0;
154 mem->size = 0;
155 mem->free = 0;
156
157 DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
158 mem->offset);
159
160 return retval;
161 }
162
sis_drm_free(struct drm_device * dev,void * data,struct drm_file * file_priv)163 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
164 {
165 drm_sis_private_t *dev_priv = dev->dev_private;
166 drm_sis_mem_t *mem = data;
167 struct sis_memblock *obj;
168
169 mutex_lock(&dev->struct_mutex);
170 obj = idr_find(&dev_priv->object_idr, mem->free);
171 if (obj == NULL) {
172 mutex_unlock(&dev->struct_mutex);
173 return -EINVAL;
174 }
175
176 idr_remove(&dev_priv->object_idr, mem->free);
177 list_del(&obj->owner_list);
178 if (drm_mm_node_allocated(&obj->mm_node))
179 drm_mm_remove_node(&obj->mm_node);
180 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
181 else
182 sis_free(obj->req.offset);
183 #endif
184 kfree(obj);
185 mutex_unlock(&dev->struct_mutex);
186 DRM_DEBUG("free = 0x%lx\n", mem->free);
187
188 return 0;
189 }
190
sis_fb_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)191 static int sis_fb_alloc(struct drm_device *dev, void *data,
192 struct drm_file *file_priv)
193 {
194 return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
195 }
196
sis_ioctl_agp_init(struct drm_device * dev,void * data,struct drm_file * file_priv)197 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
198 struct drm_file *file_priv)
199 {
200 drm_sis_private_t *dev_priv = dev->dev_private;
201 drm_sis_agp_t *agp = data;
202 dev_priv = dev->dev_private;
203
204 mutex_lock(&dev->struct_mutex);
205 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
206
207 dev_priv->agp_initialized = 1;
208 dev_priv->agp_offset = agp->offset;
209 mutex_unlock(&dev->struct_mutex);
210
211 DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
212 return 0;
213 }
214
sis_ioctl_agp_alloc(struct drm_device * dev,void * data,struct drm_file * file_priv)215 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
216 struct drm_file *file_priv)
217 {
218
219 return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
220 }
221
sis_reg_init(struct drm_device * dev)222 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
223 {
224 struct drm_map_list *entry;
225 drm_local_map_t *map;
226
227 list_for_each_entry(entry, &dev->maplist, head) {
228 map = entry->map;
229 if (!map)
230 continue;
231 if (map->type == _DRM_REGISTERS)
232 return map;
233 }
234 return NULL;
235 }
236
sis_idle(struct drm_device * dev)237 int sis_idle(struct drm_device *dev)
238 {
239 drm_sis_private_t *dev_priv = dev->dev_private;
240 uint32_t idle_reg;
241 unsigned long end;
242 int i;
243
244 if (dev_priv->idle_fault)
245 return 0;
246
247 if (dev_priv->mmio == NULL) {
248 dev_priv->mmio = sis_reg_init(dev);
249 if (dev_priv->mmio == NULL) {
250 DRM_ERROR("Could not find register map.\n");
251 return 0;
252 }
253 }
254
255 /*
256 * Implement a device switch here if needed
257 */
258
259 if (dev_priv->chipset != SIS_CHIP_315)
260 return 0;
261
262 /*
263 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
264 * because its polling frequency is too low.
265 */
266
267 end = jiffies + (HZ * 3);
268
269 for (i = 0; i < 4; ++i) {
270 do {
271 idle_reg = SIS_READ(0x85cc);
272 } while (!time_after_eq(jiffies, end) &&
273 ((idle_reg & 0x80000000) != 0x80000000));
274 }
275
276 if (time_after_eq(jiffies, end)) {
277 DRM_ERROR("Graphics engine idle timeout. "
278 "Disabling idle check\n");
279 dev_priv->idle_fault = 1;
280 }
281
282 /*
283 * The caller never sees an error code. It gets trapped
284 * in libdrm.
285 */
286
287 return 0;
288 }
289
290
sis_lastclose(struct drm_device * dev)291 void sis_lastclose(struct drm_device *dev)
292 {
293 drm_sis_private_t *dev_priv = dev->dev_private;
294
295 if (!dev_priv)
296 return;
297
298 mutex_lock(&dev->struct_mutex);
299 if (dev_priv->vram_initialized) {
300 drm_mm_takedown(&dev_priv->vram_mm);
301 dev_priv->vram_initialized = 0;
302 }
303 if (dev_priv->agp_initialized) {
304 drm_mm_takedown(&dev_priv->agp_mm);
305 dev_priv->agp_initialized = 0;
306 }
307 dev_priv->mmio = NULL;
308 mutex_unlock(&dev->struct_mutex);
309 }
310
sis_reclaim_buffers_locked(struct drm_device * dev,struct drm_file * file)311 void sis_reclaim_buffers_locked(struct drm_device *dev,
312 struct drm_file *file)
313 {
314 struct sis_file_private *file_priv = file->driver_priv;
315 struct sis_memblock *entry, *next;
316
317 if (!(dev->master && file->master->lock.hw_lock))
318 return;
319
320 drm_legacy_idlelock_take(&file->master->lock);
321
322 mutex_lock(&dev->struct_mutex);
323 if (list_empty(&file_priv->obj_list)) {
324 mutex_unlock(&dev->struct_mutex);
325 drm_legacy_idlelock_release(&file->master->lock);
326
327 return;
328 }
329
330 sis_idle(dev);
331
332
333 list_for_each_entry_safe(entry, next, &file_priv->obj_list,
334 owner_list) {
335 list_del(&entry->owner_list);
336 if (drm_mm_node_allocated(&entry->mm_node))
337 drm_mm_remove_node(&entry->mm_node);
338 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
339 else
340 sis_free(entry->req.offset);
341 #endif
342 kfree(entry);
343 }
344 mutex_unlock(&dev->struct_mutex);
345
346 drm_legacy_idlelock_release(&file->master->lock);
347
348 return;
349 }
350
351 const struct drm_ioctl_desc sis_ioctls[] = {
352 DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
353 DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
354 DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
355 DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
356 DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
357 DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
358 };
359
360 int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
361
