[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,
					    DRM_MM_SEARCH_DEFAULT);
		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,
					    DRM_MM_SEARCH_DEFAULT);
		offset = item->mm_node.start;
#endif
	}
	if (retval)
		goto fail_alloc;

	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
	if (retval < 0)
		goto fail_idr;
	user_key = retval;

	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 + (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 (!(dev->master && file->master->lock.hw_lock))
		return;

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

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

	return;
}

const 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 = 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,
31e5d7c6 DH	112	mem->size, 0,
31e5d7c6 DH	113	DRM_MM_SEARCH_DEFAULT);
be2fb9da DV	114	offset = item->mm_node.start;
	115	} else {
	116	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	117	item->req.size = mem->size;
	118	sis_malloc(&item->req);
	119	if (item->req.size == 0)
	120	retval = -ENOMEM;
	121	offset = item->req.offset;
	122	#else
	123	retval = drm_mm_insert_node(&dev_priv->vram_mm,
	124	&item->mm_node,
31e5d7c6 DH	125	mem->size, 0,
31e5d7c6 DH	126	DRM_MM_SEARCH_DEFAULT);
be2fb9da DV	127	offset = item->mm_node.start;
	128	#endif
	129	}
	130	if (retval)
	131	goto fail_alloc;
	132
ff512357 TH	133	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
ff512357 TH	134	if (retval < 0)
6de8a748	135	goto fail_idr;
ff512357	136	user_key = retval;
6de8a748 DV	137
	138	list_add(&item->owner_list, &file_priv->obj_list);
	139	mutex_unlock(&dev->struct_mutex);
	140
	141	mem->offset = ((pool == 0) ?
	142	dev_priv->vram_offset : dev_priv->agp_offset) +
be2fb9da	143	(offset << SIS_MM_ALIGN_SHIFT);
6de8a748 DV	144	mem->free = user_key;
	145	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
	146
	147	return 0;
	148
	149	fail_idr:
be2fb9da	150	drm_mm_remove_node(&item->mm_node);
6de8a748	151	fail_alloc:
be2fb9da	152	kfree(item);
fdc0b8a6	153	mutex_unlock(&dev->struct_mutex);
1da177e4	154
6de8a748 DV	155	mem->offset = 0;
	156	mem->size = 0;
	157	mem->free = 0;
	158
83bc5fd2	159	DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
c153f45f	160	mem->offset);
1da177e4 LT	161
	162	return retval;
	163	}
	164
c153f45f	165	static int sis_drm_free(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	166	{
1da177e4	167	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	168	drm_sis_mem_t *mem = data;
be2fb9da	169	struct sis_memblock *obj;
1da177e4	170
ce65a44d	171	mutex_lock(&dev->struct_mutex);
6de8a748 DV	172	obj = idr_find(&dev_priv->object_idr, mem->free);
	173	if (obj == NULL) {
	174	mutex_unlock(&dev->struct_mutex);
	175	return -EINVAL;
	176	}
	177
	178	idr_remove(&dev_priv->object_idr, mem->free);
be2fb9da DV	179	list_del(&obj->owner_list);
	180	if (drm_mm_node_allocated(&obj->mm_node))
	181	drm_mm_remove_node(&obj->mm_node);
	182	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	183	else
	184	sis_free(obj->req.offset);
	185	#endif
	186	kfree(obj);
ce65a44d	187	mutex_unlock(&dev->struct_mutex);
c153f45f	188	DRM_DEBUG("free = 0x%lx\n", mem->free);
1da177e4	189
b5215ef1	190	return 0;
1da177e4 LT	191	}
1da177e4 LT	192
c153f45f EA	193	static int sis_fb_alloc(struct drm_device dev, void data,
c153f45f EA	194	struct drm_file *file_priv)
ce65a44d	195	{
6c340eac	196	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
ce65a44d	197	}
1da177e4	198
c153f45f EA	199	static int sis_ioctl_agp_init(struct drm_device dev, void data,
c153f45f EA	200	struct drm_file *file_priv)
1da177e4	201	{
1da177e4	202	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	203	drm_sis_agp_t *agp = data;
ce65a44d	204	dev_priv = dev->dev_private;
1da177e4	205
ce65a44d	206	mutex_lock(&dev->struct_mutex);
be2fb9da	207	drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
1da177e4	208
a1d0fcf5	209	dev_priv->agp_initialized = 1;
c153f45f	210	dev_priv->agp_offset = agp->offset;
ce65a44d	211	mutex_unlock(&dev->struct_mutex);
1da177e4	212
83bc5fd2	213	DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
1da177e4 LT	214	return 0;
	215	}
	216
c153f45f EA	217	static int sis_ioctl_agp_alloc(struct drm_device dev, void data,
c153f45f EA	218	struct drm_file *file_priv)
1da177e4	219	{
1da177e4	220
6c340eac	221	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
1da177e4 LT	222	}
1da177e4 LT	223
84b1fd10	224	static drm_local_map_t sis_reg_init(struct drm_device dev)
7981bf7d	225	{
55910517	226	struct drm_map_list *entry;
7981bf7d TH	227	drm_local_map_t *map;
7981bf7d TH	228
bd1b331f	229	list_for_each_entry(entry, &dev->maplist, head) {
7981bf7d TH	230	map = entry->map;
	231	if (!map)
	232	continue;
a7b98b67	233	if (map->type == _DRM_REGISTERS)
7981bf7d	234	return map;
7981bf7d TH	235	}
	236	return NULL;
	237	}
	238
84b1fd10	239	int sis_idle(struct drm_device *dev)
7981bf7d TH	240	{
	241	drm_sis_private_t *dev_priv = dev->dev_private;
	242	uint32_t idle_reg;
	243	unsigned long end;
	244	int i;
	245
	246	if (dev_priv->idle_fault)
	247	return 0;
	248
	249	if (dev_priv->mmio == NULL) {
	250	dev_priv->mmio = sis_reg_init(dev);
	251	if (dev_priv->mmio == NULL) {
	252	DRM_ERROR("Could not find register map.\n");
	253	return 0;
	254	}
	255	}
bc5f4523	256
7981bf7d TH	257	/*
	258	* Implement a device switch here if needed
	259	*/
	260
	261	if (dev_priv->chipset != SIS_CHIP_315)
	262	return 0;
	263
	264	/*
	265	* Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
	266	* because its polling frequency is too low.
	267	*/
	268
bfd8303a	269	end = jiffies + (HZ * 3);
7981bf7d	270
a7b98b67	271	for (i = 0; i < 4; ++i) {
7981bf7d TH	272	do {
7981bf7d TH	273	idle_reg = SIS_READ(0x85cc);
a7b98b67	274	} while (!time_after_eq(jiffies, end) &&
7981bf7d TH	275	((idle_reg & 0x80000000) != 0x80000000));
	276	}
	277
	278	if (time_after_eq(jiffies, end)) {
	279	DRM_ERROR("Graphics engine idle timeout. "
	280	"Disabling idle check\n");
a1d0fcf5	281	dev_priv->idle_fault = 1;
7981bf7d TH	282	}
	283
	284	/*
	285	* The caller never sees an error code. It gets trapped
	286	* in libdrm.
	287	*/
	288
	289	return 0;
	290	}
	291
	292
ce65a44d	293	void sis_lastclose(struct drm_device *dev)
1da177e4	294	{
1da177e4	295	drm_sis_private_t *dev_priv = dev->dev_private;
1da177e4	296
ce65a44d TH	297	if (!dev_priv)
ce65a44d TH	298	return;
1da177e4	299
ce65a44d	300	mutex_lock(&dev->struct_mutex);
be2fb9da DV	301	if (dev_priv->vram_initialized) {
	302	drm_mm_takedown(&dev_priv->vram_mm);
	303	dev_priv->vram_initialized = 0;
	304	}
	305	if (dev_priv->agp_initialized) {
	306	drm_mm_takedown(&dev_priv->agp_mm);
	307	dev_priv->agp_initialized = 0;
	308	}
7981bf7d	309	dev_priv->mmio = NULL;
ce65a44d	310	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	311	}
1da177e4 LT	312
a7b98b67	313	void sis_reclaim_buffers_locked(struct drm_device *dev,
fdc0b8a6	314	struct drm_file *file)
1da177e4	315	{
fdc0b8a6	316	struct sis_file_private *file_priv = file->driver_priv;
be2fb9da	317	struct sis_memblock entry, next;
1da177e4	318
95c081c1	319	if (!(dev->master && file->master->lock.hw_lock))
ea5e4374 DV	320	return;
ea5e4374 DV	321
bb6d822e	322	drm_legacy_idlelock_take(&file->master->lock);
ea5e4374	323
ce65a44d	324	mutex_lock(&dev->struct_mutex);
fdc0b8a6	325	if (list_empty(&file_priv->obj_list)) {
ce65a44d	326	mutex_unlock(&dev->struct_mutex);
bb6d822e	327	drm_legacy_idlelock_release(&file->master->lock);
ea5e4374	328
ce65a44d	329	return;
1da177e4 LT	330	}
1da177e4 LT	331
ea5e4374	332	sis_idle(dev);
b5e89ed5	333
fdc0b8a6 DV	334
	335	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
	336	owner_list) {
be2fb9da DV	337	list_del(&entry->owner_list);
	338	if (drm_mm_node_allocated(&entry->mm_node))
	339	drm_mm_remove_node(&entry->mm_node);
	340	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	341	else
	342	sis_free(entry->req.offset);
	343	#endif
	344	kfree(entry);
fdc0b8a6	345	}
ce65a44d	346	mutex_unlock(&dev->struct_mutex);
ea5e4374	347
bb6d822e	348	drm_legacy_idlelock_release(&file->master->lock);
ea5e4374	349
ce65a44d	350	return;
1da177e4 LT	351	}
1da177e4 LT	352
baa70943	353	const struct drm_ioctl_desc sis_ioctls[] = {
1b2f1489 DA	354	DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
	355	DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
	356	DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
	357	DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
	358	DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
	359	DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
1da177e4 LT	360	};
1da177e4 LT	361
f95aeb17	362	int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);