[mirror_ubuntu-eoan-kernel.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 <video/sisfb.h>

#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/sis_drm.h>

#include "sis_drv.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);
		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);
		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
1b36d506 SR	34	#include <video/sisfb.h>
	35
	36	#include <drm/drm_device.h>
	37	#include <drm/drm_file.h>
760285e7	38	#include <drm/sis_drm.h>
1b36d506	39
1da177e4	40	#include "sis_drv.h"
ce65a44d	41
1da177e4	42
b5e89ed5	43	#define VIDEO_TYPE 0
1da177e4 LT	44	#define AGP_TYPE 1
1da177e4 LT	45
1da177e4	46
be2fb9da DV	47	struct sis_memblock {
	48	struct drm_mm_node mm_node;
	49	struct sis_memreq req;
	50	struct list_head owner_list;
	51	};
	52
6bb9e4bf	53	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
ce65a44d	54	/* fb management via fb device */
b5e89ed5	55
ce65a44d TH	56	#define SIS_MM_ALIGN_SHIFT 0
ce65a44d TH	57	#define SIS_MM_ALIGN_MASK 0
1da177e4	58
6bb9e4bf	59	#else /* CONFIG_FB_SIS[_MODULE] */
fb41e54b AB	60
fb41e54b AB	61	#define SIS_MM_ALIGN_SHIFT 4
a7b98b67	62	#define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
fb41e54b	63
6bb9e4bf	64	#endif /* CONFIG_FB_SIS[_MODULE] */
1da177e4	65
c153f45f	66	static int sis_fb_init(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	67	{
1da177e4	68	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	69	drm_sis_fb_t *fb = data;
1da177e4	70
ce65a44d	71	mutex_lock(&dev->struct_mutex);
be2fb9da DV	72	/* Unconditionally init the drm_mm, even though we don't use it when the
	73	* fb sis driver is available - make cleanup easier. */
	74	drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
1da177e4	75
a1d0fcf5	76	dev_priv->vram_initialized = 1;
c153f45f	77	dev_priv->vram_offset = fb->offset;
1da177e4	78
ce65a44d	79	mutex_unlock(&dev->struct_mutex);
83bc5fd2	80	DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);
1da177e4 LT	81
	82	return 0;
	83	}
	84
fdc0b8a6	85	static int sis_drm_alloc(struct drm_device dev, struct drm_file file,
c153f45f	86	void *data, int pool)
1da177e4	87	{
1da177e4	88	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	89	drm_sis_mem_t *mem = data;
6de8a748	90	int retval = 0, user_key;
be2fb9da	91	struct sis_memblock *item;
fdc0b8a6	92	struct sis_file_private *file_priv = file->driver_priv;
be2fb9da	93	unsigned long offset;
1da177e4	94
ce65a44d TH	95	mutex_lock(&dev->struct_mutex);
ce65a44d TH	96
a1d0fcf5	97	if (0 == ((pool == 0) ? dev_priv->vram_initialized :
ce65a44d TH	98	dev_priv->agp_initialized)) {
	99	DRM_ERROR
	100	("Attempt to allocate from uninitialized memory manager.\n");
038477aa	101	mutex_unlock(&dev->struct_mutex);
20caafa6	102	return -EINVAL;
ce65a44d	103	}
b5e89ed5	104
be2fb9da	105	item = kzalloc(sizeof(*item), GFP_KERNEL);
6de8a748 DV	106	if (!item) {
	107	retval = -ENOMEM;
	108	goto fail_alloc;
	109	}
ce65a44d	110
be2fb9da DV	111	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
	112	if (pool == AGP_TYPE) {
	113	retval = drm_mm_insert_node(&dev_priv->agp_mm,
	114	&item->mm_node,
4e64e553	115	mem->size);
be2fb9da DV	116	offset = item->mm_node.start;
	117	} else {
	118	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	119	item->req.size = mem->size;
	120	sis_malloc(&item->req);
	121	if (item->req.size == 0)
	122	retval = -ENOMEM;
	123	offset = item->req.offset;
	124	#else
	125	retval = drm_mm_insert_node(&dev_priv->vram_mm,
	126	&item->mm_node,
4e64e553	127	mem->size);
be2fb9da DV	128	offset = item->mm_node.start;
	129	#endif
	130	}
	131	if (retval)
	132	goto fail_alloc;
	133
ff512357 TH	134	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
ff512357 TH	135	if (retval < 0)
6de8a748	136	goto fail_idr;
ff512357	137	user_key = retval;
6de8a748 DV	138
	139	list_add(&item->owner_list, &file_priv->obj_list);
	140	mutex_unlock(&dev->struct_mutex);
	141
	142	mem->offset = ((pool == 0) ?
	143	dev_priv->vram_offset : dev_priv->agp_offset) +
be2fb9da	144	(offset << SIS_MM_ALIGN_SHIFT);
6de8a748 DV	145	mem->free = user_key;
	146	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
	147
	148	return 0;
	149
	150	fail_idr:
be2fb9da	151	drm_mm_remove_node(&item->mm_node);
6de8a748	152	fail_alloc:
be2fb9da	153	kfree(item);
fdc0b8a6	154	mutex_unlock(&dev->struct_mutex);
1da177e4	155
6de8a748 DV	156	mem->offset = 0;
	157	mem->size = 0;
	158	mem->free = 0;
	159
83bc5fd2	160	DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
c153f45f	161	mem->offset);
1da177e4 LT	162
	163	return retval;
	164	}
	165
c153f45f	166	static int sis_drm_free(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	167	{
1da177e4	168	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	169	drm_sis_mem_t *mem = data;
be2fb9da	170	struct sis_memblock *obj;
1da177e4	171
ce65a44d	172	mutex_lock(&dev->struct_mutex);
6de8a748 DV	173	obj = idr_find(&dev_priv->object_idr, mem->free);
	174	if (obj == NULL) {
	175	mutex_unlock(&dev->struct_mutex);
	176	return -EINVAL;
	177	}
	178
	179	idr_remove(&dev_priv->object_idr, mem->free);
be2fb9da DV	180	list_del(&obj->owner_list);
	181	if (drm_mm_node_allocated(&obj->mm_node))
	182	drm_mm_remove_node(&obj->mm_node);
	183	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	184	else
	185	sis_free(obj->req.offset);
	186	#endif
	187	kfree(obj);
ce65a44d	188	mutex_unlock(&dev->struct_mutex);
c153f45f	189	DRM_DEBUG("free = 0x%lx\n", mem->free);
1da177e4	190
b5215ef1	191	return 0;
1da177e4 LT	192	}
1da177e4 LT	193
c153f45f EA	194	static int sis_fb_alloc(struct drm_device dev, void data,
c153f45f EA	195	struct drm_file *file_priv)
ce65a44d	196	{
6c340eac	197	return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
ce65a44d	198	}
1da177e4	199
c153f45f EA	200	static int sis_ioctl_agp_init(struct drm_device dev, void data,
c153f45f EA	201	struct drm_file *file_priv)
1da177e4	202	{
1da177e4	203	drm_sis_private_t *dev_priv = dev->dev_private;
c153f45f	204	drm_sis_agp_t *agp = data;
ce65a44d	205	dev_priv = dev->dev_private;
1da177e4	206
ce65a44d	207	mutex_lock(&dev->struct_mutex);
be2fb9da	208	drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
1da177e4	209
a1d0fcf5	210	dev_priv->agp_initialized = 1;
c153f45f	211	dev_priv->agp_offset = agp->offset;
ce65a44d	212	mutex_unlock(&dev->struct_mutex);
1da177e4	213
83bc5fd2	214	DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
1da177e4 LT	215	return 0;
	216	}
	217
c153f45f EA	218	static int sis_ioctl_agp_alloc(struct drm_device dev, void data,
c153f45f EA	219	struct drm_file *file_priv)
1da177e4	220	{
1da177e4	221
6c340eac	222	return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
1da177e4 LT	223	}
1da177e4 LT	224
84b1fd10	225	static drm_local_map_t sis_reg_init(struct drm_device dev)
7981bf7d	226	{
55910517	227	struct drm_map_list *entry;
7981bf7d TH	228	drm_local_map_t *map;
7981bf7d TH	229
bd1b331f	230	list_for_each_entry(entry, &dev->maplist, head) {
7981bf7d TH	231	map = entry->map;
	232	if (!map)
	233	continue;
a7b98b67	234	if (map->type == _DRM_REGISTERS)
7981bf7d	235	return map;
7981bf7d TH	236	}
	237	return NULL;
	238	}
	239
84b1fd10	240	int sis_idle(struct drm_device *dev)
7981bf7d TH	241	{
	242	drm_sis_private_t *dev_priv = dev->dev_private;
	243	uint32_t idle_reg;
	244	unsigned long end;
	245	int i;
	246
	247	if (dev_priv->idle_fault)
	248	return 0;
	249
	250	if (dev_priv->mmio == NULL) {
	251	dev_priv->mmio = sis_reg_init(dev);
	252	if (dev_priv->mmio == NULL) {
	253	DRM_ERROR("Could not find register map.\n");
	254	return 0;
	255	}
	256	}
bc5f4523	257
7981bf7d TH	258	/*
	259	* Implement a device switch here if needed
	260	*/
	261
	262	if (dev_priv->chipset != SIS_CHIP_315)
	263	return 0;
	264
	265	/*
	266	* Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
	267	* because its polling frequency is too low.
	268	*/
	269
bfd8303a	270	end = jiffies + (HZ * 3);
7981bf7d	271
a7b98b67	272	for (i = 0; i < 4; ++i) {
7981bf7d TH	273	do {
7981bf7d TH	274	idle_reg = SIS_READ(0x85cc);
a7b98b67	275	} while (!time_after_eq(jiffies, end) &&
7981bf7d TH	276	((idle_reg & 0x80000000) != 0x80000000));
	277	}
	278
	279	if (time_after_eq(jiffies, end)) {
	280	DRM_ERROR("Graphics engine idle timeout. "
	281	"Disabling idle check\n");
a1d0fcf5	282	dev_priv->idle_fault = 1;
7981bf7d TH	283	}
	284
	285	/*
	286	* The caller never sees an error code. It gets trapped
	287	* in libdrm.
	288	*/
	289
	290	return 0;
	291	}
	292
	293
ce65a44d	294	void sis_lastclose(struct drm_device *dev)
1da177e4	295	{
1da177e4	296	drm_sis_private_t *dev_priv = dev->dev_private;
1da177e4	297
ce65a44d TH	298	if (!dev_priv)
ce65a44d TH	299	return;
1da177e4	300
ce65a44d	301	mutex_lock(&dev->struct_mutex);
be2fb9da DV	302	if (dev_priv->vram_initialized) {
	303	drm_mm_takedown(&dev_priv->vram_mm);
	304	dev_priv->vram_initialized = 0;
	305	}
	306	if (dev_priv->agp_initialized) {
	307	drm_mm_takedown(&dev_priv->agp_mm);
	308	dev_priv->agp_initialized = 0;
	309	}
7981bf7d	310	dev_priv->mmio = NULL;
ce65a44d	311	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	312	}
1da177e4 LT	313
a7b98b67	314	void sis_reclaim_buffers_locked(struct drm_device *dev,
fdc0b8a6	315	struct drm_file *file)
1da177e4	316	{
fdc0b8a6	317	struct sis_file_private *file_priv = file->driver_priv;
be2fb9da	318	struct sis_memblock entry, next;
1da177e4	319
95c081c1	320	if (!(dev->master && file->master->lock.hw_lock))
ea5e4374 DV	321	return;
ea5e4374 DV	322
bb6d822e	323	drm_legacy_idlelock_take(&file->master->lock);
ea5e4374	324
ce65a44d	325	mutex_lock(&dev->struct_mutex);
fdc0b8a6	326	if (list_empty(&file_priv->obj_list)) {
ce65a44d	327	mutex_unlock(&dev->struct_mutex);
bb6d822e	328	drm_legacy_idlelock_release(&file->master->lock);
ea5e4374	329
ce65a44d	330	return;
1da177e4 LT	331	}
1da177e4 LT	332
ea5e4374	333	sis_idle(dev);
b5e89ed5	334
fdc0b8a6 DV	335
	336	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
	337	owner_list) {
be2fb9da DV	338	list_del(&entry->owner_list);
	339	if (drm_mm_node_allocated(&entry->mm_node))
	340	drm_mm_remove_node(&entry->mm_node);
	341	#if defined(CONFIG_FB_SIS) \|\| defined(CONFIG_FB_SIS_MODULE)
	342	else
	343	sis_free(entry->req.offset);
	344	#endif
	345	kfree(entry);
fdc0b8a6	346	}
ce65a44d	347	mutex_unlock(&dev->struct_mutex);
ea5e4374	348
bb6d822e	349	drm_legacy_idlelock_release(&file->master->lock);
ea5e4374	350
ce65a44d	351	return;
1da177e4 LT	352	}
1da177e4 LT	353
baa70943	354	const struct drm_ioctl_desc sis_ioctls[] = {
1b2f1489 DA	355	DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
	356	DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
	357	DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
	358	DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
	359	DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
	360	DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH \| DRM_MASTER \| DRM_ROOT_ONLY),
1da177e4 LT	361	};
1da177e4 LT	362
f95aeb17	363	int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);