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 Hellstr�m <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
50static 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
63static void sis_sman_mm_free(void *private, void *ref)
64{
65	sis_free(~((unsigned long)ref));
66}
67
68static void sis_sman_mm_destroy(void *private)
69{
70	;
71}
72
73static 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
85static int sis_fb_init(DRM_IOCTL_ARGS)
86{
87	DRM_DEVICE;
88	drm_sis_private_t *dev_priv = dev->dev_private;
89	drm_sis_fb_t fb;
90	int ret;
91
92	DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *) data, sizeof(fb));
93
94	mutex_lock(&dev->struct_mutex);
95#if defined(CONFIG_FB_SIS)
96	{
97		drm_sman_mm_t sman_mm;
98		sman_mm.private = (void *)0xFFFFFFFF;
99		sman_mm.allocate = sis_sman_mm_allocate;
100		sman_mm.free = sis_sman_mm_free;
101		sman_mm.destroy = sis_sman_mm_destroy;
102		sman_mm.offset = sis_sman_mm_offset;
103		ret =
104		    drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
105	}
106#else
107	ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
108				 fb.size >> SIS_MM_ALIGN_SHIFT);
109#endif
110
111	if (ret) {
112		DRM_ERROR("VRAM memory manager initialisation error\n");
113		mutex_unlock(&dev->struct_mutex);
114		return ret;
115	}
116
117	dev_priv->vram_initialized = 1;
118	dev_priv->vram_offset = fb.offset;
119
120	mutex_unlock(&dev->struct_mutex);
121	DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
122
123	return 0;
124}
125
126static int sis_drm_alloc(drm_device_t * dev, drm_file_t * priv,
127			 unsigned long data, int pool)
128{
129	drm_sis_private_t *dev_priv = dev->dev_private;
130	drm_sis_mem_t __user *argp = (drm_sis_mem_t __user *) data;
131	drm_sis_mem_t mem;
132	int retval = 0;
133	drm_memblock_item_t *item;
134
135	DRM_COPY_FROM_USER_IOCTL(mem, argp, sizeof(mem));
136
137	mutex_lock(&dev->struct_mutex);
138
139	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
140		      dev_priv->agp_initialized)) {
141		DRM_ERROR
142		    ("Attempt to allocate from uninitialized memory manager.\n");
143		return DRM_ERR(EINVAL);
144	}
145
146	mem.size = (mem.size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
147	item = drm_sman_alloc(&dev_priv->sman, pool, mem.size, 0,
148			      (unsigned long)priv);
149
150	mutex_unlock(&dev->struct_mutex);
151	if (item) {
152		mem.offset = ((pool == 0) ?
153			      dev_priv->vram_offset : dev_priv->agp_offset) +
154		    (item->mm->
155		     offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
156		mem.free = item->user_hash.key;
157		mem.size = mem.size << SIS_MM_ALIGN_SHIFT;
158	} else {
159		mem.offset = 0;
160		mem.size = 0;
161		mem.free = 0;
162		retval = DRM_ERR(ENOMEM);
163	}
164
165	DRM_COPY_TO_USER_IOCTL(argp, mem, sizeof(mem));
166
167	DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem.size,
168		  mem.offset);
169
170	return retval;
171}
172
173static int sis_drm_free(DRM_IOCTL_ARGS)
174{
175	DRM_DEVICE;
176	drm_sis_private_t *dev_priv = dev->dev_private;
177	drm_sis_mem_t mem;
178	int ret;
179
180	DRM_COPY_FROM_USER_IOCTL(mem, (drm_sis_mem_t __user *) data,
181				 sizeof(mem));
182
183	mutex_lock(&dev->struct_mutex);
184	ret = drm_sman_free_key(&dev_priv->sman, mem.free);
185	mutex_unlock(&dev->struct_mutex);
186	DRM_DEBUG("free = 0x%lx\n", mem.free);
187
188	return ret;
189}
190
191static int sis_fb_alloc(DRM_IOCTL_ARGS)
192{
193	DRM_DEVICE;
194	return sis_drm_alloc(dev, priv, data, VIDEO_TYPE);
195}
196
197static int sis_ioctl_agp_init(DRM_IOCTL_ARGS)
198{
199	DRM_DEVICE;
200	drm_sis_private_t *dev_priv = dev->dev_private;
201	drm_sis_agp_t agp;
202	int ret;
203	dev_priv = dev->dev_private;
204
205	DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *) data,
206				 sizeof(agp));
207	mutex_lock(&dev->struct_mutex);
208	ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
209				 agp.size >> SIS_MM_ALIGN_SHIFT);
210
211	if (ret) {
212		DRM_ERROR("AGP memory manager initialisation error\n");
213		mutex_unlock(&dev->struct_mutex);
214		return ret;
215	}
216
217	dev_priv->agp_initialized = 1;
218	dev_priv->agp_offset = agp.offset;
219	mutex_unlock(&dev->struct_mutex);
220
221	DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
222	return 0;
223}
224
225static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
226{
227	DRM_DEVICE;
228
229	return sis_drm_alloc(dev, priv, data, AGP_TYPE);
230}
231
232static drm_local_map_t *sis_reg_init(drm_device_t *dev)
233{
234	drm_map_list_t *entry;
235	drm_local_map_t *map;
236
237	list_for_each_entry(entry, &dev->maplist->head, head) {
238		map = entry->map;
239		if (!map)
240			continue;
241		if (map->type == _DRM_REGISTERS) {
242			return map;
243		}
244	}
245	return NULL;
246}
247
248int sis_idle(drm_device_t *dev)
249{
250	drm_sis_private_t *dev_priv = dev->dev_private;
251	uint32_t idle_reg;
252	unsigned long end;
253	int i;
254
255	if (dev_priv->idle_fault)
256		return 0;
257
258	if (dev_priv->mmio == NULL) {
259		dev_priv->mmio = sis_reg_init(dev);
260		if (dev_priv->mmio == NULL) {
261			DRM_ERROR("Could not find register map.\n");
262			return 0;
263		}
264	}
265
266	/*
267	 * Implement a device switch here if needed
268	 */
269
270	if (dev_priv->chipset != SIS_CHIP_315)
271		return 0;
272
273	/*
274	 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
275	 * because its polling frequency is too low.
276	 */
277
278	end = jiffies + (DRM_HZ * 3);
279
280	for (i=0; i<4; ++i) {
281		do {
282			idle_reg = SIS_READ(0x85cc);
283		} while ( !time_after_eq(jiffies, end) &&
284			  ((idle_reg & 0x80000000) != 0x80000000));
285	}
286
287	if (time_after_eq(jiffies, end)) {
288		DRM_ERROR("Graphics engine idle timeout. "
289			  "Disabling idle check\n");
290		dev_priv->idle_fault = 1;
291	}
292
293	/*
294	 * The caller never sees an error code. It gets trapped
295	 * in libdrm.
296	 */
297
298	return 0;
299}
300
301
302void sis_lastclose(struct drm_device *dev)
303{
304	drm_sis_private_t *dev_priv = dev->dev_private;
305
306	if (!dev_priv)
307		return;
308
309	mutex_lock(&dev->struct_mutex);
310	drm_sman_cleanup(&dev_priv->sman);
311	dev_priv->vram_initialized = 0;
312	dev_priv->agp_initialized = 0;
313	dev_priv->mmio = NULL;
314	mutex_unlock(&dev->struct_mutex);
315}
316
317void sis_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
318{
319	drm_sis_private_t *dev_priv = dev->dev_private;
320	drm_file_t *priv = filp->private_data;
321
322	mutex_lock(&dev->struct_mutex);
323	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
324		mutex_unlock(&dev->struct_mutex);
325		return;
326	}
327
328	if (dev->driver->dma_quiescent) {
329		dev->driver->dma_quiescent(dev);
330	}
331
332	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
333	mutex_unlock(&dev->struct_mutex);
334	return;
335}
336
337drm_ioctl_desc_t sis_ioctls[] = {
338	[DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)] = {sis_fb_alloc, DRM_AUTH},
339	[DRM_IOCTL_NR(DRM_SIS_FB_FREE)] = {sis_drm_free, DRM_AUTH},
340	[DRM_IOCTL_NR(DRM_SIS_AGP_INIT)] =
341	    {sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY},
342	[DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = {sis_ioctl_agp_alloc, DRM_AUTH},
343	[DRM_IOCTL_NR(DRM_SIS_AGP_FREE)] = {sis_drm_free, DRM_AUTH},
344	[DRM_IOCTL_NR(DRM_SIS_FB_INIT)] =
345	    {sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY}
346};
347
348int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
349