aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/drm/via_mm.c
blob: 13921f3c0ec26cc6b7abeb2a5d77c27c707ed05e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
#include "drmP.h"
#include "via_drm.h"
#include "via_drv.h"
#include "via_ds.h"
#include "via_mm.h"

#define MAX_CONTEXT 100

typedef struct {
	int used;
	int context;
	set_t *sets[2];		/* 0 for frame buffer, 1 for AGP , 2 for System */
} via_context_t;

static via_context_t global_ppriv[MAX_CONTEXT];

static int via_agp_alloc(drm_via_mem_t * mem);
static int via_agp_free(drm_via_mem_t * mem);
static int via_fb_alloc(drm_via_mem_t * mem);
static int via_fb_free(drm_via_mem_t * mem);

static int add_alloc_set(int context, int type, unsigned int val)
{
	int i, retval = 0;

	for (i = 0; i < MAX_CONTEXT; i++) {
		if (global_ppriv[i].used && global_ppriv[i].context == context) {
			retval = via_setAdd(global_ppriv[i].sets[type], val);
			break;
		}
	}

	return retval;
}

static int del_alloc_set(int context, int type, unsigned int val)
{
	int i, retval = 0;

	for (i = 0; i < MAX_CONTEXT; i++)
		if (global_ppriv[i].used && global_ppriv[i].context == context) {
			retval = via_setDel(global_ppriv[i].sets[type], val);
			break;
		}

	return retval;
}

/* agp memory management */
static memHeap_t *AgpHeap = NULL;

int via_agp_init(DRM_IOCTL_ARGS)
{
	drm_via_agp_t agp;

	DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t __user *) data,
				 sizeof(agp));

	AgpHeap = via_mmInit(agp.offset, agp.size);

	DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)agp.offset, (unsigned long)agp.size);

	return 0;
}

/* fb memory management */
static memHeap_t *FBHeap = NULL;

int via_fb_init(DRM_IOCTL_ARGS)
{
	drm_via_fb_t fb;

	DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t __user *) data, sizeof(fb));

	FBHeap = via_mmInit(fb.offset, fb.size);

	DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)fb.offset, (unsigned long)fb.size);

	return 0;
}

int via_init_context(struct drm_device *dev, int context)
{
	int i;

	for (i = 0; i < MAX_CONTEXT; i++)
		if (global_ppriv[i].used &&
		    (global_ppriv[i].context == context))
			break;

	if (i >= MAX_CONTEXT) {
		for (i = 0; i < MAX_CONTEXT; i++) {
			if (!global_ppriv[i].used) {
				global_ppriv[i].context = context;
				global_ppriv[i].used = 1;
				global_ppriv[i].sets[0] = via_setInit();
				global_ppriv[i].sets[1] = via_setInit();
				DRM_DEBUG("init allocation set, socket=%d,"
					  " context = %d\n", i, context);
				break;
			}
		}

		if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
		    (global_ppriv[i].sets[1] == NULL)) {
			return 0;
		}
	}

	return 1;
}

int via_final_context(struct drm_device *dev, int context)
{	
        int i;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;

	for (i = 0; i < MAX_CONTEXT; i++)
		if (global_ppriv[i].used &&
		    (global_ppriv[i].context == context))
			break;

	if (i < MAX_CONTEXT) {
		set_t *set;
		ITEM_TYPE item;
		int retval;

		DRM_DEBUG("find socket %d, context = %d\n", i, context);

		/* Video Memory */
		set = global_ppriv[i].sets[0];
		retval = via_setFirst(set, &item);
		while (retval) {
			DRM_DEBUG("free video memory 0x%lx\n", item);
			via_mmFreeMem((PMemBlock) item);
			retval = via_setNext(set, &item);
		}
		via_setDestroy(set);

		/* AGP Memory */
		set = global_ppriv[i].sets[1];
		retval = via_setFirst(set, &item);
		while (retval) {
			DRM_DEBUG("free agp memory 0x%lx\n", item);
			via_mmFreeMem((PMemBlock) item);
			retval = via_setNext(set, &item);
		}
		via_setDestroy(set);
		global_ppriv[i].used = 0;
	}
	via_release_futex(dev_priv, context); 
	
			
#if defined(__linux__)
	/* Linux specific until context tracking code gets ported to BSD */
	/* Last context, perform cleanup */
	if (dev->ctx_count == 1 && dev->dev_private) {
	        DRM_DEBUG("Last Context\n");
		if (dev->irq)
			drm_irq_uninstall(dev);

		via_cleanup_futex(dev_priv);
		via_do_cleanup_map(dev);
	}
#endif

	return 1;
}

int via_mem_alloc(DRM_IOCTL_ARGS)
{
	drm_via_mem_t mem;

	DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
				 sizeof(mem));

	switch (mem.type) {
	case VIDEO:
		if (via_fb_alloc(&mem) < 0)
			return -EFAULT;
		DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem,
				       sizeof(mem));
		return 0;
	case AGP:
		if (via_agp_alloc(&mem) < 0)
			return -EFAULT;
		DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem,
				       sizeof(mem));
		return 0;
	}

	return -EFAULT;
}

static int via_fb_alloc(drm_via_mem_t * mem)
{
	drm_via_mm_t fb;
	PMemBlock block;
	int retval = 0;

	if (!FBHeap)
		return -1;

	fb.size = mem->size;
	fb.context = mem->context;

	block = via_mmAllocMem(FBHeap, fb.size, 5, 0);
	if (block) {
		fb.offset = block->ofs;
		fb.free = (unsigned long)block;
		if (!add_alloc_set(fb.context, VIDEO, fb.free)) {
			DRM_DEBUG("adding to allocation set fails\n");
			via_mmFreeMem((PMemBlock) fb.free);
			retval = -1;
		}
	} else {
		fb.offset = 0;
		fb.size = 0;
		fb.free = 0;
		retval = -1;
	}

	mem->offset = fb.offset;
	mem->index = fb.free;

	DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size,
		  (int)fb.offset);

	return retval;
}

static int via_agp_alloc(drm_via_mem_t * mem)
{
	drm_via_mm_t agp;
	PMemBlock block;
	int retval = 0;

	if (!AgpHeap)
		return -1;

	agp.size = mem->size;
	agp.context = mem->context;

	block = via_mmAllocMem(AgpHeap, agp.size, 5, 0);
	if (block) {
		agp.offset = block->ofs;
		agp.free = (unsigned long)block;
		if (!add_alloc_set(agp.context, AGP, agp.free)) {
			DRM_DEBUG("adding to allocation set fails\n");
			via_mmFreeMem((PMemBlock) agp.free);
			retval = -1;
		}
	} else {
		agp.offset = 0;
		agp.size = 0;
		agp.free = 0;
	}

	mem->offset = agp.offset;
	mem->index = agp.free;

	DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size,
		  (unsigned int)agp.offset);
	return retval;
}

int via_mem_free(DRM_IOCTL_ARGS)
{
	drm_via_mem_t mem;

	DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
				 sizeof(mem));

	switch (mem.type) {

	case VIDEO:
		if (via_fb_free(&mem) == 0)
			return 0;
		break;
	case AGP:
		if (via_agp_free(&mem) == 0)
			return 0;
		break;
	}

	return -EFAULT;
}

static int via_fb_free(drm_via_mem_t * mem)
{
	drm_via_mm_t fb;
	int retval = 0;

	if (!FBHeap) {
		return -1;
	}

	fb.free = mem->index;
	fb.context = mem->context;

	if (!fb.free) {
		return -1;

	}

	via_mmFreeMem((PMemBlock) fb.free);

	if (!del_alloc_set(fb.context, VIDEO, fb.free)) {
		retval = -1;
	}

	DRM_DEBUG("free fb, free = %ld\n", fb.free);

	return retval;
}

static int via_agp_free(drm_via_mem_t * mem)
{
	drm_via_mm_t agp;

	int retval = 0;

	agp.free = mem->index;
	agp.context = mem->context;

	if (!agp.free)
		return -1;

	via_mmFreeMem((PMemBlock) agp.free);

	if (!del_alloc_set(agp.context, AGP, agp.free)) {
		retval = -1;
	}

	DRM_DEBUG("free agp, free = %ld\n", agp.free);

	return retval;
}