[deliverable/linux.git] / drivers / gpu / drm / sis / sis_mm.c

/**************************************************************************
 *
 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
 * 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
 * THE COPYRIGHT HOLDERS, AUTHORS 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.
 *
 *
 **************************************************************************/

/*
 * Authors:
 *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

#include <drm/drmP.h>
#include <drm/sis_drm.h>
#include "sis_drv.h"

#include <video/sisfb.h>

#define VIDEO_TYPE 0
#define AGP_TYPE 1


struct sis_memblock {
	struct drm_mm_node mm_node;
	struct sis_memreq req;
	struct list_head owner_list;
};

#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
/* fb management via fb device */

#define SIS_MM_ALIGN_SHIFT 0
#define SIS_MM_ALIGN_MASK 0

#else /* CONFIG_FB_SIS[_MODULE] */

#define SIS_MM_ALIGN_SHIFT 4
#define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)

#endif /* CONFIG_FB_SIS[_MODULE] */

static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_fb_t *fb = data;

	mutex_lock(&dev->struct_mutex);
	/* Unconditionally init the drm_mm, even though we don't use it when the
	 * fb sis driver is available - make cleanup easier. */
	drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);

	dev_priv->vram_initialized = 1;
	dev_priv->vram_offset = fb->offset;

	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);

	return 0;
}

static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
			 void *data, int pool)
{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_mem_t *mem = data;
	int retval = 0, user_key;
	struct sis_memblock *item;
	struct sis_file_private *file_priv = file->driver_priv;
	unsigned long offset;

	mutex_lock(&dev->struct_mutex);

	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
		      dev_priv->agp_initialized)) {
		DRM_ERROR
		    ("Attempt to allocate from uninitialized memory manager.\n");
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}

	item = kzalloc(sizeof(*item), GFP_KERNEL);
	if (!item) {
		retval = -ENOMEM;
		goto fail_alloc;
	}

	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
	if (pool == AGP_TYPE) {
		retval = drm_mm_insert_node(&dev_priv->agp_mm,
					    &item->mm_node,
					    mem->size, 0);
		offset = item->mm_node.start;
	} else {
#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
		item->req.size = mem->size;
		sis_malloc(&item->req);
		if (item->req.size == 0)
			retval = -ENOMEM;
		offset = item->req.offset;
#else
		retval = drm_mm_insert_node(&dev_priv->vram_mm,
					    &item->mm_node,
					    mem->size, 0);
		offset = item->mm_node.start;
#endif
	}
	if (retval)
		goto fail_alloc;

again:
	if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
		retval = -ENOMEM;
		goto fail_idr;
	}

	retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
	if (retval == -EAGAIN)
		goto again;
	if (retval)
		goto fail_idr;

	list_add(&item->owner_list, &file_priv->obj_list);
	mutex_unlock(&dev->struct_mutex);

	mem->offset = ((pool == 0) ?
		      dev_priv->vram_offset : dev_priv->agp_offset) +
	    (offset << SIS_MM_ALIGN_SHIFT);
	mem->free = user_key;
	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;

	return 0;

fail_idr:
	drm_mm_remove_node(&item->mm_node);
fail_alloc:
	kfree(item);
	mutex_unlock(&dev->struct_mutex);

	mem->offset = 0;
	mem->size = 0;
	mem->free = 0;

	DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
		  mem->offset);

	return retval;
}

static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_mem_t *mem = data;
	struct sis_memblock *obj;

	mutex_lock(&dev->struct_mutex);
	obj = idr_find(&dev_priv->object_idr, mem->free);
	if (obj == NULL) {
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}

	idr_remove(&dev_priv->object_idr, mem->free);
	list_del(&obj->owner_list);
	if (drm_mm_node_allocated(&obj->mm_node))
		drm_mm_remove_node(&obj->mm_node);
#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
	else
		sis_free(obj->req.offset);
#endif
	kfree(obj);
	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("free = 0x%lx\n", mem->free);

	return 0;
}

static int sis_fb_alloc(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
}

static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
			      struct drm_file *file_priv)
{
	drm_sis_private_t *dev_priv = dev->dev_private;
	drm_sis_agp_t *agp = data;
	dev_priv = dev->dev_private;

	mutex_lock(&dev->struct_mutex);
	drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);

	dev_priv->agp_initialized = 1;
	dev_priv->agp_offset = agp->offset;
	mutex_unlock(&dev->struct_mutex);

	DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
	return 0;
}

static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
			       struct drm_file *file_priv)
{

	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
}

static drm_local_map_t *sis_reg_init(struct drm_device *dev)
{
	struct drm_map_list *entry;
	drm_local_map_t *map;

	list_for_each_entry(entry, &dev->maplist, head) {
		map = entry->map;
		if (!map)
			continue;
		if (map->type == _DRM_REGISTERS)
			return map;
	}
	return NULL;
}

int sis_idle(struct drm_device *dev)
{
	drm_sis_private_t *dev_priv = dev->dev_private;
	uint32_t idle_reg;
	unsigned long end;
	int i;

	if (dev_priv->idle_fault)
		return 0;

	if (dev_priv->mmio == NULL) {
		dev_priv->mmio = sis_reg_init(dev);
		if (dev_priv->mmio == NULL) {
			DRM_ERROR("Could not find register map.\n");
			return 0;
		}
	}

	/*
	 * Implement a device switch here if needed
	 */

	if (dev_priv->chipset != SIS_CHIP_315)
		return 0;

	/*
	 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
	 * because its polling frequency is too low.
	 */

	end = jiffies + (DRM_HZ * 3);

	for (i = 0; i < 4; ++i) {
		do {
			idle_reg = SIS_READ(0x85cc);
		} while (!time_after_eq(jiffies, end) &&
			  ((idle_reg & 0x80000000) != 0x80000000));
	}

	if (time_after_eq(jiffies, end)) {
		DRM_ERROR("Graphics engine idle timeout. "
			  "Disabling idle check\n");
		dev_priv->idle_fault = 1;
	}

	/*
	 * The caller never sees an error code. It gets trapped
	 * in libdrm.
	 */

	return 0;
}


void sis_lastclose(struct drm_device *dev)
{
	drm_sis_private_t *dev_priv = dev->dev_private;

	if (!dev_priv)
		return;

	mutex_lock(&dev->struct_mutex);
	if (dev_priv->vram_initialized) {
		drm_mm_takedown(&dev_priv->vram_mm);
		dev_priv->vram_initialized = 0;
	}
	if (dev_priv->agp_initialized) {
		drm_mm_takedown(&dev_priv->agp_mm);
		dev_priv->agp_initialized = 0;
	}
	dev_priv->mmio = NULL;
	mutex_unlock(&dev->struct_mutex);
}

void sis_reclaim_buffers_locked(struct drm_device *dev,
				struct drm_file *file)
{
	struct sis_file_private *file_priv = file->driver_priv;
	struct sis_memblock *entry, *next;

	if (!(file->minor->master && file->master->lock.hw_lock))
		return;

	drm_idlelock_take(&file->master->lock);

	mutex_lock(&dev->struct_mutex);
	if (list_empty(&file_priv->obj_list)) {
		mutex_unlock(&dev->struct_mutex);
		drm_idlelock_release(&file->master->lock);

		return;
	}

	sis_idle(dev);


	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
				 owner_list) {
		list_del(&entry->owner_list);
		if (drm_mm_node_allocated(&entry->mm_node))
			drm_mm_remove_node(&entry->mm_node);
#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
		else
			sis_free(entry->req.offset);
#endif
		kfree(entry);
	}
	mutex_unlock(&dev->struct_mutex);

	drm_idlelock_release(&file->master->lock);

	return;
}

struct drm_ioctl_desc sis_ioctls[] = {
	DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
};

int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
Commit	Line	Data
ce65a44d	1	/**************************************************************************
1da177e4	2	*
ce65a44d TH	3	* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
ce65a44d TH	4	* All Rights Reserved.
1da177e4 LT	5	*
1da177e4 LT	6	* Permission is hereby granted, free of charge, to any person obtaining a
ce65a44d TH	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:
b5e89ed5	13	*
ce65a44d TH	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.
b5e89ed5	17	*
1da177e4 LT	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1da177e4 LT	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ce65a44d TH	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.
b5e89ed5	25	*
b5e89ed5	26	*
ce65a44d TH	27	**************************************************************************/
	28
	29	/*
	30	* Authors:
96de0e25	31	* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
1da177e4 LT	32	*/
1da177e4 LT	33
760285e7 DH	34	#include <drm/drmP.h>
760285e7 DH	35	#include <drm/sis_drm.h>
1da177e4	36	#include "sis_drv.h"
ce65a44d	37
1da177e4	38	#include <video/sisfb.h>
1da177e4	39
b5e89ed5	40	#define VIDEO_TYPE 0
1da177e4 LT	41	#define AGP_TYPE 1
1da177e4 LT	42
1da177e4	43
be2fb9da DV	44	struct sis_memblock {
	45	struct drm_mm_node mm_node;
	46	struct sis_memreq req;
	47	struct list_head owner_list;
	48	};
	49
6bb9e4bf	50	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
ce65a44d	51	/* fb management via fb device */
b5e89ed5	52
ce65a44d TH	53	#define SIS_MM_ALIGN_SHIFT 0
ce65a44d TH	54	#define SIS_MM_ALIGN_MASK 0
1da177e4	55
6bb9e4bf	56	#else /* CONFIG_FB_SIS[_MODULE] */
fb41e54b AB	57
fb41e54b AB	58	#define SIS_MM_ALIGN_SHIFT 4
a7b98b67	59	#define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
fb41e54b	60
6bb9e4bf	61	#endif /* CONFIG_FB_SIS[_MODULE] */
1da177e4	62
c153f45f	63	static int sis_fb_init(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	64	{
1da177e4	65	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	66	drm_sis_fb_t *fb = data;
1da177e4	67
ce65a44d	68	mutex_lock(&dev->struct_mutex);
be2fb9da DV	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);
1da177e4	72
a1d0fcf5	73	dev_priv->vram_initialized = 1;
c153f45f	74	dev_priv->vram_offset = fb->offset;
1da177e4	75
ce65a44d	76	mutex_unlock(&dev->struct_mutex);
83bc5fd2	77	DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);
1da177e4 LT	78
	79	return 0;
	80	}
	81
fdc0b8a6	82	static int sis_drm_alloc(struct drm_device dev, struct drm_file file,
c153f45f	83	void *data, int pool)
1da177e4	84	{
1da177e4	85	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	86	drm_sis_mem_t *mem = data;
6de8a748	87	int retval = 0, user_key;
be2fb9da	88	struct sis_memblock *item;
fdc0b8a6	89	struct sis_file_private *file_priv = file->driver_priv;
be2fb9da	90	unsigned long offset;
1da177e4	91
ce65a44d TH	92	mutex_lock(&dev->struct_mutex);
ce65a44d TH	93
a1d0fcf5	94	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
ce65a44d TH	95	dev_priv->agp_initialized)) {
	96	DRM_ERROR
	97	("Attempt to allocate from uninitialized memory manager.\n");
038477aa	98	mutex_unlock(&dev->struct_mutex);
20caafa6	99	return -EINVAL;
ce65a44d	100	}
b5e89ed5	101
be2fb9da	102	item = kzalloc(sizeof(*item), GFP_KERNEL);
6de8a748 DV	103	if (!item) {
	104	retval = -ENOMEM;
	105	goto fail_alloc;
	106	}
ce65a44d	107
be2fb9da DV	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, 0);
	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, 0);
	125	offset = item->mm_node.start;
	126	#endif
	127	}
	128	if (retval)
	129	goto fail_alloc;
	130
6de8a748 DV	131	again:
6de8a748 DV	132	if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
20caafa6	133	retval = -ENOMEM;
6de8a748	134	goto fail_idr;
1da177e4	135	}
6de8a748 DV	136
	137	retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
	138	if (retval == -EAGAIN)
	139	goto again;
	140	if (retval)
	141	goto fail_idr;
	142
	143	list_add(&item->owner_list, &file_priv->obj_list);
	144	mutex_unlock(&dev->struct_mutex);
	145
	146	mem->offset = ((pool == 0) ?
	147	dev_priv->vram_offset : dev_priv->agp_offset) +
be2fb9da	148	(offset << SIS_MM_ALIGN_SHIFT);
6de8a748 DV	149	mem->free = user_key;
	150	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
	151
	152	return 0;
	153
	154	fail_idr:
be2fb9da	155	drm_mm_remove_node(&item->mm_node);
6de8a748	156	fail_alloc:
be2fb9da	157	kfree(item);
fdc0b8a6	158	mutex_unlock(&dev->struct_mutex);
1da177e4	159
6de8a748 DV	160	mem->offset = 0;
	161	mem->size = 0;
	162	mem->free = 0;
	163
83bc5fd2	164	DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
c153f45f	165	mem->offset);
1da177e4 LT	166
	167	return retval;
	168	}
	169
c153f45f	170	static int sis_drm_free(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	171	{
1da177e4	172	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	173	drm_sis_mem_t *mem = data;
be2fb9da	174	struct sis_memblock *obj;
1da177e4	175
ce65a44d	176	mutex_lock(&dev->struct_mutex);
6de8a748 DV	177	obj = idr_find(&dev_priv->object_idr, mem->free);
	178	if (obj == NULL) {
	179	mutex_unlock(&dev->struct_mutex);
	180	return -EINVAL;
	181	}
	182
	183	idr_remove(&dev_priv->object_idr, mem->free);
be2fb9da DV	184	list_del(&obj->owner_list);
	185	if (drm_mm_node_allocated(&obj->mm_node))
	186	drm_mm_remove_node(&obj->mm_node);
	187	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	188	else
	189	sis_free(obj->req.offset);
	190	#endif
	191	kfree(obj);
ce65a44d	192	mutex_unlock(&dev->struct_mutex);
c153f45f	193	DRM_DEBUG("free = 0x%lx\n", mem->free);
1da177e4	194
b5215ef1	195	return 0;
1da177e4 LT	196	}
1da177e4 LT	197
c153f45f EA	198	static int sis_fb_alloc(struct drm_device dev, void data,
c153f45f EA	199	struct drm_file *file_priv)
ce65a44d	200	{
6c340eac	201	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
ce65a44d	202	}
1da177e4	203
c153f45f EA	204	static int sis_ioctl_agp_init(struct drm_device dev, void data,
c153f45f EA	205	struct drm_file *file_priv)
1da177e4	206	{
1da177e4	207	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	208	drm_sis_agp_t *agp = data;
ce65a44d	209	dev_priv = dev->dev_private;
1da177e4	210
ce65a44d	211	mutex_lock(&dev->struct_mutex);
be2fb9da	212	drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
1da177e4	213
a1d0fcf5	214	dev_priv->agp_initialized = 1;
c153f45f	215	dev_priv->agp_offset = agp->offset;
ce65a44d	216	mutex_unlock(&dev->struct_mutex);
1da177e4	217
83bc5fd2	218	DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
1da177e4 LT	219	return 0;
	220	}
	221
c153f45f EA	222	static int sis_ioctl_agp_alloc(struct drm_device dev, void data,
c153f45f EA	223	struct drm_file *file_priv)
1da177e4	224	{
1da177e4	225
6c340eac	226	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
1da177e4 LT	227	}
1da177e4 LT	228
84b1fd10	229	static drm_local_map_t sis_reg_init(struct drm_device dev)
7981bf7d	230	{
55910517	231	struct drm_map_list *entry;
7981bf7d TH	232	drm_local_map_t *map;
7981bf7d TH	233
bd1b331f	234	list_for_each_entry(entry, &dev->maplist, head) {
7981bf7d TH	235	map = entry->map;
	236	if (!map)
	237	continue;
a7b98b67	238	if (map->type == _DRM_REGISTERS)
7981bf7d	239	return map;
7981bf7d TH	240	}
	241	return NULL;
	242	}
	243
84b1fd10	244	int sis_idle(struct drm_device *dev)
7981bf7d TH	245	{
	246	drm_sis_private_t *dev_priv = dev->dev_private;
	247	uint32_t idle_reg;
	248	unsigned long end;
	249	int i;
	250
	251	if (dev_priv->idle_fault)
	252	return 0;
	253
	254	if (dev_priv->mmio == NULL) {
	255	dev_priv->mmio = sis_reg_init(dev);
	256	if (dev_priv->mmio == NULL) {
	257	DRM_ERROR("Could not find register map.\n");
	258	return 0;
	259	}
	260	}
bc5f4523	261
7981bf7d TH	262	/*
	263	* Implement a device switch here if needed
	264	*/
	265
	266	if (dev_priv->chipset != SIS_CHIP_315)
	267	return 0;
	268
	269	/*
	270	* Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
	271	* because its polling frequency is too low.
	272	*/
	273
	274	end = jiffies + (DRM_HZ * 3);
	275
a7b98b67	276	for (i = 0; i < 4; ++i) {
7981bf7d TH	277	do {
7981bf7d TH	278	idle_reg = SIS_READ(0x85cc);
a7b98b67	279	} while (!time_after_eq(jiffies, end) &&
7981bf7d TH	280	((idle_reg & 0x80000000) != 0x80000000));
	281	}
	282
	283	if (time_after_eq(jiffies, end)) {
	284	DRM_ERROR("Graphics engine idle timeout. "
	285	"Disabling idle check\n");
a1d0fcf5	286	dev_priv->idle_fault = 1;
7981bf7d TH	287	}
	288
	289	/*
	290	* The caller never sees an error code. It gets trapped
	291	* in libdrm.
	292	*/
	293
	294	return 0;
	295	}
	296
	297
ce65a44d	298	void sis_lastclose(struct drm_device *dev)
1da177e4	299	{
1da177e4	300	drm_sis_private_t *dev_priv = dev->dev_private;
1da177e4	301
ce65a44d TH	302	if (!dev_priv)
ce65a44d TH	303	return;
1da177e4	304
ce65a44d	305	mutex_lock(&dev->struct_mutex);
be2fb9da DV	306	if (dev_priv->vram_initialized) {
	307	drm_mm_takedown(&dev_priv->vram_mm);
	308	dev_priv->vram_initialized = 0;
	309	}
	310	if (dev_priv->agp_initialized) {
	311	drm_mm_takedown(&dev_priv->agp_mm);
	312	dev_priv->agp_initialized = 0;
	313	}
7981bf7d	314	dev_priv->mmio = NULL;
ce65a44d	315	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	316	}
1da177e4 LT	317
a7b98b67	318	void sis_reclaim_buffers_locked(struct drm_device *dev,
fdc0b8a6	319	struct drm_file *file)
1da177e4	320	{
fdc0b8a6	321	struct sis_file_private *file_priv = file->driver_priv;
be2fb9da	322	struct sis_memblock entry, next;
1da177e4	323
ea5e4374 DV	324	if (!(file->minor->master && file->master->lock.hw_lock))
	325	return;
	326
	327	drm_idlelock_take(&file->master->lock);
	328
ce65a44d	329	mutex_lock(&dev->struct_mutex);
fdc0b8a6	330	if (list_empty(&file_priv->obj_list)) {
ce65a44d	331	mutex_unlock(&dev->struct_mutex);
ea5e4374 DV	332	drm_idlelock_release(&file->master->lock);
ea5e4374 DV	333
ce65a44d	334	return;
1da177e4 LT	335	}
1da177e4 LT	336
ea5e4374	337	sis_idle(dev);
b5e89ed5	338
fdc0b8a6 DV	339
	340	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
	341	owner_list) {
be2fb9da DV	342	list_del(&entry->owner_list);
	343	if (drm_mm_node_allocated(&entry->mm_node))
	344	drm_mm_remove_node(&entry->mm_node);
	345	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	346	else
	347	sis_free(entry->req.offset);
	348	#endif
	349	kfree(entry);
fdc0b8a6	350	}
ce65a44d	351	mutex_unlock(&dev->struct_mutex);
ea5e4374 DV	352
	353	drm_idlelock_release(&file->master->lock);
	354
ce65a44d	355	return;
1da177e4 LT	356	}
1da177e4 LT	357
c153f45f	358	struct drm_ioctl_desc sis_ioctls[] = {
1b2f1489 DA	359	DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
	360	DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
	361	DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
	362	DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
	363	DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
	364	DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
1da177e4 LT	365	};
	366
	367	int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);