sis_mm.c revision 152909 
1/* sis_mm.c -- Private header for Direct Rendering Manager -*- linux-c -*-
2 * Created: Mon Jan  4 10:05:05 1999 by sclin@sis.com.tw
3 *
4 * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
5 * All rights reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the next
15 * paragraph) shall be included in all copies or substantial portions of the
16 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
21 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 * DEALINGS IN THE SOFTWARE.
25 *
26 * Authors:
27 *    Sung-Ching Lin <sclin@sis.com.tw>
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/drm/sis_mm.c 152909 2005-11-28 23:13:57Z anholt $");
33
34#if defined(__linux__) && defined(CONFIG_FB_SIS)
35#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
36#include <video/sisfb.h>
37#else
38#include <linux/sisfb.h>
39#endif
40#endif
41#include "dev/drm/drmP.h"
42#include "dev/drm/sis_drm.h"
43#include "dev/drm/sis_drv.h"
44#include "dev/drm/sis_ds.h"
45
46#define MAX_CONTEXT 100
47#define VIDEO_TYPE 0
48#define AGP_TYPE 1
49
50typedef struct {
51	int used;
52	int context;
53	set_t *sets[2];		/* 0 for video, 1 for AGP */
54} sis_context_t;
55
56static sis_context_t global_ppriv[MAX_CONTEXT];
57
58static int add_alloc_set(int context, int type, unsigned int val)
59{
60	int i, retval = 0;
61
62	for (i = 0; i < MAX_CONTEXT; i++) {
63		if (global_ppriv[i].used && global_ppriv[i].context == context) {
64			retval = setAdd(global_ppriv[i].sets[type], val);
65			break;
66		}
67	}
68	return retval;
69}
70
71static int del_alloc_set(int context, int type, unsigned int val)
72{
73	int i, retval = 0;
74
75	for (i = 0; i < MAX_CONTEXT; i++) {
76		if (global_ppriv[i].used && global_ppriv[i].context == context) {
77			retval = setDel(global_ppriv[i].sets[type], val);
78			break;
79		}
80	}
81	return retval;
82}
83
84/* fb management via fb device */
85#if defined(__linux__) && defined(CONFIG_FB_SIS)
86
87static int sis_fb_init(DRM_IOCTL_ARGS)
88{
89	return 0;
90}
91
92static int sis_fb_alloc(DRM_IOCTL_ARGS)
93{
94	drm_sis_mem_t fb;
95	struct sis_memreq req;
96	drm_sis_mem_t __user *argp = (void __user *)data;
97	int retval = 0;
98
99	DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
100
101	req.size = fb.size;
102	sis_malloc(&req);
103	if (req.offset) {
104		/* TODO */
105		fb.offset = req.offset;
106		fb.free = req.offset;
107		if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
108			DRM_DEBUG("adding to allocation set fails\n");
109			sis_free(req.offset);
110			retval = DRM_ERR(EINVAL);
111		}
112	} else {
113		fb.offset = 0;
114		fb.size = 0;
115		fb.free = 0;
116	}
117
118	DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
119
120	DRM_DEBUG("alloc fb, size = %d, offset = %ld\n", fb.size, req.offset);
121
122	return retval;
123}
124
125static int sis_fb_free(DRM_IOCTL_ARGS)
126{
127	drm_sis_mem_t fb;
128	int retval = 0;
129
130	DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *) data, sizeof(fb));
131
132	if (!fb.free)
133		return DRM_ERR(EINVAL);
134
135	if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
136		retval = DRM_ERR(EINVAL);
137	sis_free(fb.free);
138
139	DRM_DEBUG("free fb, offset = 0x%lx\n", fb.free);
140
141	return retval;
142}
143
144#else
145
146/* Called by the X Server to initialize the FB heap.  Allocations will fail
147 * unless this is called.  Offset is the beginning of the heap from the
148 * framebuffer offset (MaxXFBMem in XFree86).
149 *
150 * Memory layout according to Thomas Winischofer:
151 * |------------------|DDDDDDDDDDDDDDDDDDDDDDDDDDDDD|HHHH|CCCCCCCCCCC|
152 *
153 *    X driver/sisfb                                  HW-   Command-
154 *  framebuffer memory           DRI heap           Cursor   queue
155 */
156static int sis_fb_init(DRM_IOCTL_ARGS)
157{
158	DRM_DEVICE;
159	drm_sis_private_t *dev_priv = dev->dev_private;
160	drm_sis_fb_t fb;
161
162	DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *) data, sizeof(fb));
163
164	if (dev_priv == NULL) {
165		dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
166					      DRM_MEM_DRIVER);
167		dev_priv = dev->dev_private;
168		if (dev_priv == NULL)
169			return ENOMEM;
170	}
171
172	if (dev_priv->FBHeap != NULL)
173		return DRM_ERR(EINVAL);
174
175	dev_priv->FBHeap = mmInit(fb.offset, fb.size);
176
177	DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
178
179	return 0;
180}
181
182static int sis_fb_alloc(DRM_IOCTL_ARGS)
183{
184	DRM_DEVICE;
185	drm_sis_private_t *dev_priv = dev->dev_private;
186	drm_sis_mem_t __user *argp = (void __user *)data;
187	drm_sis_mem_t fb;
188	PMemBlock block;
189	int retval = 0;
190
191	if (dev_priv == NULL || dev_priv->FBHeap == NULL)
192		return DRM_ERR(EINVAL);
193
194	DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
195
196	block = mmAllocMem(dev_priv->FBHeap, fb.size, 0, 0);
197	if (block) {
198		/* TODO */
199		fb.offset = block->ofs;
200		fb.free = (unsigned long)block;
201		if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
202			DRM_DEBUG("adding to allocation set fails\n");
203			mmFreeMem((PMemBlock) fb.free);
204			retval = DRM_ERR(EINVAL);
205		}
206	} else {
207		fb.offset = 0;
208		fb.size = 0;
209		fb.free = 0;
210	}
211
212	DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
213
214	DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, fb.offset);
215
216	return retval;
217}
218
219static int sis_fb_free(DRM_IOCTL_ARGS)
220{
221	DRM_DEVICE;
222	drm_sis_private_t *dev_priv = dev->dev_private;
223	drm_sis_mem_t fb;
224
225	if (dev_priv == NULL || dev_priv->FBHeap == NULL)
226		return DRM_ERR(EINVAL);
227
228	DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *) data, sizeof(fb));
229
230	if (!mmBlockInHeap(dev_priv->FBHeap, (PMemBlock) fb.free))
231		return DRM_ERR(EINVAL);
232
233	if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
234		return DRM_ERR(EINVAL);
235	mmFreeMem((PMemBlock) fb.free);
236
237	DRM_DEBUG("free fb, free = 0x%lx\n", fb.free);
238
239	return 0;
240}
241
242#endif
243
244/* agp memory management */
245
246static int sis_ioctl_agp_init(DRM_IOCTL_ARGS)
247{
248	DRM_DEVICE;
249	drm_sis_private_t *dev_priv = dev->dev_private;
250	drm_sis_agp_t agp;
251
252	if (dev_priv == NULL) {
253		dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
254					      DRM_MEM_DRIVER);
255		dev_priv = dev->dev_private;
256		if (dev_priv == NULL)
257			return ENOMEM;
258	}
259
260	if (dev_priv->AGPHeap != NULL)
261		return DRM_ERR(EINVAL);
262
263	DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *) data,
264				 sizeof(agp));
265
266	dev_priv->AGPHeap = mmInit(agp.offset, agp.size);
267
268	DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
269
270	return 0;
271}
272
273static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
274{
275	DRM_DEVICE;
276	drm_sis_private_t *dev_priv = dev->dev_private;
277	drm_sis_mem_t __user *argp = (drm_sis_mem_t __user *)data;
278	drm_sis_mem_t agp;
279	PMemBlock block;
280	int retval = 0;
281
282	if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
283		return DRM_ERR(EINVAL);
284
285	DRM_COPY_FROM_USER_IOCTL(agp, argp, sizeof(agp));
286
287	block = mmAllocMem(dev_priv->AGPHeap, agp.size, 0, 0);
288	if (block) {
289		/* TODO */
290		agp.offset = block->ofs;
291		agp.free = (unsigned long)block;
292		if (!add_alloc_set(agp.context, AGP_TYPE, agp.free)) {
293			DRM_DEBUG("adding to allocation set fails\n");
294			mmFreeMem((PMemBlock) agp.free);
295			retval = -1;
296		}
297	} else {
298		agp.offset = 0;
299		agp.size = 0;
300		agp.free = 0;
301	}
302
303	DRM_COPY_TO_USER_IOCTL(argp, agp, sizeof(agp));
304
305	DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size, agp.offset);
306
307	return retval;
308}
309
310static int sis_ioctl_agp_free(DRM_IOCTL_ARGS)
311{
312	DRM_DEVICE;
313	drm_sis_private_t *dev_priv = dev->dev_private;
314	drm_sis_mem_t agp;
315
316	if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
317		return DRM_ERR(EINVAL);
318
319	DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_mem_t __user *) data,
320				 sizeof(agp));
321
322	if (!mmBlockInHeap(dev_priv->AGPHeap, (PMemBlock) agp.free))
323		return DRM_ERR(EINVAL);
324
325	mmFreeMem((PMemBlock) agp.free);
326	if (!del_alloc_set(agp.context, AGP_TYPE, agp.free))
327		return DRM_ERR(EINVAL);
328
329	DRM_DEBUG("free agp, free = 0x%lx\n", agp.free);
330
331	return 0;
332}
333
334int sis_init_context(struct drm_device *dev, int context)
335{
336	int i;
337
338	for (i = 0; i < MAX_CONTEXT; i++) {
339		if (global_ppriv[i].used &&
340		    (global_ppriv[i].context == context))
341			break;
342	}
343
344	if (i >= MAX_CONTEXT) {
345		for (i = 0; i < MAX_CONTEXT; i++) {
346			if (!global_ppriv[i].used) {
347				global_ppriv[i].context = context;
348				global_ppriv[i].used = 1;
349				global_ppriv[i].sets[0] = setInit();
350				global_ppriv[i].sets[1] = setInit();
351				DRM_DEBUG("init allocation set, socket=%d, "
352					  "context = %d\n", i, context);
353				break;
354			}
355		}
356		if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
357		    (global_ppriv[i].sets[1] == NULL)) {
358			return 0;
359		}
360	}
361
362	return 1;
363}
364
365int sis_final_context(struct drm_device *dev, int context)
366{
367	int i;
368
369	for (i = 0; i < MAX_CONTEXT; i++) {
370		if (global_ppriv[i].used &&
371		    (global_ppriv[i].context == context))
372			break;
373	}
374
375	if (i < MAX_CONTEXT) {
376		set_t *set;
377		ITEM_TYPE item;
378		int retval;
379
380		DRM_DEBUG("find socket %d, context = %d\n", i, context);
381
382		/* Video Memory */
383		set = global_ppriv[i].sets[0];
384		retval = setFirst(set, &item);
385		while (retval) {
386			DRM_DEBUG("free video memory 0x%lx\n", item);
387#if defined(__linux__) && defined(CONFIG_FB_SIS)
388			sis_free(item);
389#else
390			mmFreeMem((PMemBlock) item);
391#endif
392			retval = setNext(set, &item);
393		}
394		setDestroy(set);
395
396		/* AGP Memory */
397		set = global_ppriv[i].sets[1];
398		retval = setFirst(set, &item);
399		while (retval) {
400			DRM_DEBUG("free agp memory 0x%lx\n", item);
401			mmFreeMem((PMemBlock) item);
402			retval = setNext(set, &item);
403		}
404		setDestroy(set);
405
406		global_ppriv[i].used = 0;
407	}
408
409	return 1;
410}
411
412drm_ioctl_desc_t sis_ioctls[] = {
413	[DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)] = {sis_fb_alloc, DRM_AUTH},
414	[DRM_IOCTL_NR(DRM_SIS_FB_FREE)] = {sis_fb_free, DRM_AUTH},
415	[DRM_IOCTL_NR(DRM_SIS_AGP_INIT)] = {sis_ioctl_agp_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
416	[DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = {sis_ioctl_agp_alloc, DRM_AUTH},
417	[DRM_IOCTL_NR(DRM_SIS_AGP_FREE)] = {sis_ioctl_agp_free, DRM_AUTH},
418	[DRM_IOCTL_NR(DRM_SIS_FB_INIT)] = {sis_fb_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}
419};
420
421int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
422