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#if defined(__linux__) && defined(CONFIG_FB_SIS)
32#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
33#include <video/sisfb.h>
34#else
35#include <linux/sisfb.h>
36#endif
37#endif
38#include "drmP.h"
39#include "sis_drm.h"
40#include "sis_drv.h"
41#include "sis_ds.h"
42
43#define MAX_CONTEXT 100
44#define VIDEO_TYPE 0
45#define AGP_TYPE 1
46
47typedef struct {
48	int used;
49	int context;
50	set_t *sets[2];		/* 0 for video, 1 for AGP */
51} sis_context_t;
52
53static sis_context_t global_ppriv[MAX_CONTEXT];
54
55static int add_alloc_set(int context, int type, unsigned int val)
56{
57	int i, retval = 0;
58
59	for (i = 0; i < MAX_CONTEXT; i++) {
60		if (global_ppriv[i].used && global_ppriv[i].context == context) {
61			retval = setAdd(global_ppriv[i].sets[type], val);
62			break;
63		}
64	}
65	return retval;
66}
67
68static int del_alloc_set(int context, int type, unsigned int val)
69{
70	int i, retval = 0;
71
72	for (i = 0; i < MAX_CONTEXT; i++) {
73		if (global_ppriv[i].used && global_ppriv[i].context == context) {
74			retval = setDel(global_ppriv[i].sets[type], val);
75			break;
76		}
77	}
78	return retval;
79}
80
81/* fb management via fb device */
82#if defined(__linux__) && defined(CONFIG_FB_SIS)
83
84static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
85{
86	return 0;
87}
88
89static int sis_fb_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv)
90{
91	drm_sis_mem_t *fb = data;
92	struct sis_memreq req;
93	int retval = 0;
94
95	req.size = fb->size;
96	sis_malloc(&req);
97	if (req.offset) {
98		/* TODO */
99		fb->offset = req.offset;
100		fb->free = req.offset;
101		if (!add_alloc_set(fb->context, VIDEO_TYPE, fb->free)) {
102			DRM_DEBUG("adding to allocation set fails\n");
103			sis_free(req.offset);
104			retval = -EINVAL;
105		}
106	} else {
107		fb->offset = 0;
108		fb->size = 0;
109		fb->free = 0;
110	}
111
112	DRM_DEBUG("alloc fb, size = %d, offset = %ld\n", fb->size, req.offset);
113
114	return retval;
115}
116
117static int sis_fb_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
118{
119	drm_sis_mem_t fb;
120	int retval = 0;
121
122	if (!fb->free)
123		return -EINVAL;
124
125	if (!del_alloc_set(fb->context, VIDEO_TYPE, fb->free))
126		retval = -EINVAL;
127	sis_free(fb->free);
128
129	DRM_DEBUG("free fb, offset = 0x%lx\n", fb->free);
130
131	return retval;
132}
133
134#else
135
136/* Called by the X Server to initialize the FB heap.  Allocations will fail
137 * unless this is called.  Offset is the beginning of the heap from the
138 * framebuffer offset (MaxXFBMem in XFree86).
139 *
140 * Memory layout according to Thomas Winischofer:
141 * |------------------|DDDDDDDDDDDDDDDDDDDDDDDDDDDDD|HHHH|CCCCCCCCCCC|
142 *
143 *    X driver/sisfb                                  HW-   Command-
144 *  framebuffer memory           DRI heap           Cursor   queue
145 */
146static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
147{
148	drm_sis_private_t *dev_priv = dev->dev_private;
149	drm_sis_fb_t *fb = data;
150
151	if (dev_priv == NULL) {
152		dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
153					      DRM_MEM_DRIVER);
154		dev_priv = dev->dev_private;
155		if (dev_priv == NULL)
156			return ENOMEM;
157	}
158
159	if (dev_priv->FBHeap != NULL)
160		return -EINVAL;
161
162	dev_priv->FBHeap = mmInit(fb->offset, fb->size);
163
164	DRM_DEBUG("offset = %u, size = %u", fb->offset, fb->size);
165
166	return 0;
167}
168
169static int sis_fb_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv)
170{
171	drm_sis_private_t *dev_priv = dev->dev_private;
172	drm_sis_mem_t *fb = data;
173	PMemBlock block;
174	int retval = 0;
175
176	if (dev_priv == NULL || dev_priv->FBHeap == NULL)
177		return -EINVAL;
178
179	block = mmAllocMem(dev_priv->FBHeap, fb->size, 0, 0);
180	if (block) {
181		/* TODO */
182		fb->offset = block->ofs;
183		fb->free = (unsigned long)block;
184		if (!add_alloc_set(fb->context, VIDEO_TYPE, fb->free)) {
185			DRM_DEBUG("adding to allocation set fails\n");
186			mmFreeMem((PMemBlock) fb->free);
187			retval = -EINVAL;
188		}
189	} else {
190		fb->offset = 0;
191		fb->size = 0;
192		fb->free = 0;
193	}
194
195	DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb->size, fb->offset);
196
197	return retval;
198}
199
200static int sis_fb_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
201{
202	drm_sis_private_t *dev_priv = dev->dev_private;
203	drm_sis_mem_t *fb = data;
204
205	if (dev_priv == NULL || dev_priv->FBHeap == NULL)
206		return -EINVAL;
207
208	if (!mmBlockInHeap(dev_priv->FBHeap, (PMemBlock) fb->free))
209		return -EINVAL;
210
211	if (!del_alloc_set(fb->context, VIDEO_TYPE, fb->free))
212		return -EINVAL;
213	mmFreeMem((PMemBlock) fb->free);
214
215	DRM_DEBUG("free fb, free = 0x%lx\n", fb->free);
216
217	return 0;
218}
219
220#endif
221
222/* agp memory management */
223
224static int sis_ioctl_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
225{
226	drm_sis_private_t *dev_priv = dev->dev_private;
227	drm_sis_agp_t *agp = data;
228
229	if (dev_priv == NULL) {
230		dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
231					      DRM_MEM_DRIVER);
232		dev_priv = dev->dev_private;
233		if (dev_priv == NULL)
234			return ENOMEM;
235	}
236
237	if (dev_priv->AGPHeap != NULL)
238		return -EINVAL;
239
240	dev_priv->AGPHeap = mmInit(agp->offset, agp->size);
241
242	DRM_DEBUG("offset = %u, size = %u", agp->offset, agp->size);
243
244	return 0;
245}
246
247static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv)
248{
249	drm_sis_private_t *dev_priv = dev->dev_private;
250	drm_sis_mem_t *agp = data;
251	PMemBlock block;
252	int retval = 0;
253
254	if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
255		return -EINVAL;
256
257	block = mmAllocMem(dev_priv->AGPHeap, agp->size, 0, 0);
258	if (block) {
259		/* TODO */
260		agp->offset = block->ofs;
261		agp->free = (unsigned long)block;
262		if (!add_alloc_set(agp->context, AGP_TYPE, agp->free)) {
263			DRM_DEBUG("adding to allocation set fails\n");
264			mmFreeMem((PMemBlock) agp->free);
265			retval = -1;
266		}
267	} else {
268		agp->offset = 0;
269		agp->size = 0;
270		agp->free = 0;
271	}
272
273	DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp->size,
274	    agp->offset);
275
276	return retval;
277}
278
279static int sis_ioctl_agp_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
280{
281	drm_sis_private_t *dev_priv = dev->dev_private;
282	drm_sis_mem_t *agp = data;
283
284	if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
285		return -EINVAL;
286
287	if (!mmBlockInHeap(dev_priv->AGPHeap, (PMemBlock) agp->free))
288		return -EINVAL;
289
290	mmFreeMem((PMemBlock) agp->free);
291	if (!del_alloc_set(agp->context, AGP_TYPE, agp->free))
292		return -EINVAL;
293
294	DRM_DEBUG("free agp, free = 0x%lx\n", agp->free);
295
296	return 0;
297}
298
299int sis_init_context(struct drm_device *dev, int context)
300{
301	int i;
302
303	for (i = 0; i < MAX_CONTEXT; i++) {
304		if (global_ppriv[i].used &&
305		    (global_ppriv[i].context == context))
306			break;
307	}
308
309	if (i >= MAX_CONTEXT) {
310		for (i = 0; i < MAX_CONTEXT; i++) {
311			if (!global_ppriv[i].used) {
312				global_ppriv[i].context = context;
313				global_ppriv[i].used = 1;
314				global_ppriv[i].sets[0] = setInit();
315				global_ppriv[i].sets[1] = setInit();
316				DRM_DEBUG("init allocation set, socket=%d, "
317					  "context = %d\n", i, context);
318				break;
319			}
320		}
321		if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
322		    (global_ppriv[i].sets[1] == NULL)) {
323			return 0;
324		}
325	}
326
327	return 1;
328}
329
330int sis_final_context(struct drm_device *dev, int context)
331{
332	int i;
333
334	for (i = 0; i < MAX_CONTEXT; i++) {
335		if (global_ppriv[i].used &&
336		    (global_ppriv[i].context == context))
337			break;
338	}
339
340	if (i < MAX_CONTEXT) {
341		set_t *set;
342		ITEM_TYPE item;
343		int retval;
344
345		DRM_DEBUG("find socket %d, context = %d\n", i, context);
346
347		/* Video Memory */
348		set = global_ppriv[i].sets[0];
349		retval = setFirst(set, &item);
350		while (retval) {
351			DRM_DEBUG("free video memory 0x%lx\n", item);
352#if defined(__linux__) && defined(CONFIG_FB_SIS)
353			sis_free(item);
354#else
355			mmFreeMem((PMemBlock) item);
356#endif
357			retval = setNext(set, &item);
358		}
359		setDestroy(set);
360
361		/* AGP Memory */
362		set = global_ppriv[i].sets[1];
363		retval = setFirst(set, &item);
364		while (retval) {
365			DRM_DEBUG("free agp memory 0x%lx\n", item);
366			mmFreeMem((PMemBlock) item);
367			retval = setNext(set, &item);
368		}
369		setDestroy(set);
370
371		global_ppriv[i].used = 0;
372	}
373
374	return 1;
375}
376
377drm_ioctl_desc_t sis_ioctls[] = {
378	DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
379	DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_fb_free, DRM_AUTH),
380	DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
381	DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
382	DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_ioctl_agp_free, DRM_AUTH),
383	DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY)
384};
385
386int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
387