[linux.git] / drivers / block / z2ram.c

/*
** z2ram - Amiga pseudo-driver to access 16bit-RAM in ZorroII space
**         as a block device, to be used as a RAM disk or swap space
** 
** Copyright (C) 1994 by Ingo Wilken ([email protected])
**
** ++Geert: support for zorro_unused_z2ram, better range checking
** ++roman: translate accesses via an array
** ++Milan: support for ChipRAM usage
** ++yambo: converted to 2.0 kernel
** ++yambo: modularized and support added for 3 minor devices including:
**          MAJOR  MINOR  DESCRIPTION
**          -----  -----  ----------------------------------------------
**          37     0       Use Zorro II and Chip ram
**          37     1       Use only Zorro II ram
**          37     2       Use only Chip ram
**          37     4-7     Use memory list entry 1-4 (first is 0)
** ++jskov: support for 1-4th memory list entry.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation.  This software is provided "as is" without express or
** implied warranty.
*/

#define DEVICE_NAME "Z2RAM"

#include <linux/major.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#include <linux/slab.h>

#include <asm/setup.h>
#include <asm/amigahw.h>
#include <asm/pgtable.h>

#include <linux/zorro.h>


extern int m68k_realnum_memory;
extern struct mem_info m68k_memory[NUM_MEMINFO];

#define Z2MINOR_COMBINED      (0)
#define Z2MINOR_Z2ONLY        (1)
#define Z2MINOR_CHIPONLY      (2)
#define Z2MINOR_MEMLIST1      (4)
#define Z2MINOR_MEMLIST2      (5)
#define Z2MINOR_MEMLIST3      (6)
#define Z2MINOR_MEMLIST4      (7)
#define Z2MINOR_COUNT         (8) /* Move this down when adding a new minor */

#define Z2RAM_CHUNK1024       ( Z2RAM_CHUNKSIZE >> 10 )

static DEFINE_MUTEX(z2ram_mutex);
static u_long *z2ram_map    = NULL;
static u_long z2ram_size    = 0;
static int z2_count         = 0;
static int chip_count       = 0;
static int list_count       = 0;
static int current_device   = -1;

static DEFINE_SPINLOCK(z2ram_lock);

static struct gendisk *z2ram_gendisk;

static void do_z2_request(struct request_queue *q)
{
	struct request *req;

	req = blk_fetch_request(q);
	while (req) {
		unsigned long start = blk_rq_pos(req) << 9;
		unsigned long len  = blk_rq_cur_bytes(req);
		int err = 0;

		if (start + len > z2ram_size) {
			printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n",
				blk_rq_pos(req), blk_rq_cur_sectors(req));
			err = -EIO;
			goto done;
		}
		while (len) {
			unsigned long addr = start & Z2RAM_CHUNKMASK;
			unsigned long size = Z2RAM_CHUNKSIZE - addr;
			if (len < size)
				size = len;
			addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
			if (rq_data_dir(req) == READ)
				memcpy(req->buffer, (char *)addr, size);
			else
				memcpy((char *)addr, req->buffer, size);
			start += size;
			len -= size;
		}
	done:
		if (!__blk_end_request_cur(req, err))
			req = blk_fetch_request(q);
	}
}

static void
get_z2ram( void )
{
    int i;

    for ( i = 0; i < Z2RAM_SIZE / Z2RAM_CHUNKSIZE; i++ )
    {
	if ( test_bit( i, zorro_unused_z2ram ) )
	{
	    z2_count++;
	    z2ram_map[ z2ram_size++ ] = 
		ZTWO_VADDR( Z2RAM_START ) + ( i << Z2RAM_CHUNKSHIFT );
	    clear_bit( i, zorro_unused_z2ram );
	}
    }

    return;
}

static void
get_chipram( void )
{

    while ( amiga_chip_avail() > ( Z2RAM_CHUNKSIZE * 4 ) )
    {
	chip_count++;
	z2ram_map[ z2ram_size ] =
	    (u_long)amiga_chip_alloc( Z2RAM_CHUNKSIZE, "z2ram" );

	if ( z2ram_map[ z2ram_size ] == 0 )
	{
	    break;
	}

	z2ram_size++;
    }
	
    return;
}

static int z2_open(struct block_device *bdev, fmode_t mode)
{
    int device;
    int max_z2_map = ( Z2RAM_SIZE / Z2RAM_CHUNKSIZE ) *
	sizeof( z2ram_map[0] );
    int max_chip_map = ( amiga_chip_size / Z2RAM_CHUNKSIZE ) *
	sizeof( z2ram_map[0] );
    int rc = -ENOMEM;

    device = MINOR(bdev->bd_dev);

    mutex_lock(&z2ram_mutex);
    if ( current_device != -1 && current_device != device )
    {
	rc = -EBUSY;
	goto err_out;
    }

    if ( current_device == -1 )
    {
	z2_count   = 0;
	chip_count = 0;
	list_count = 0;
	z2ram_size = 0;

	/* Use a specific list entry. */
	if (device >= Z2MINOR_MEMLIST1 && device <= Z2MINOR_MEMLIST4) {
		int index = device - Z2MINOR_MEMLIST1 + 1;
		unsigned long size, paddr, vaddr;

		if (index >= m68k_realnum_memory) {
			printk( KERN_ERR DEVICE_NAME
				": no such entry in z2ram_map\n" );
		        goto err_out;
		}

		paddr = m68k_memory[index].addr;
		size = m68k_memory[index].size & ~(Z2RAM_CHUNKSIZE-1);

#ifdef __powerpc__
		/* FIXME: ioremap doesn't build correct memory tables. */
		{
			vfree(vmalloc (size));
		}

		vaddr = (unsigned long) __ioremap (paddr, size, 
						   _PAGE_WRITETHRU);

#else
		vaddr = (unsigned long)z_remap_nocache_nonser(paddr, size);
#endif
		z2ram_map = 
			kmalloc((size/Z2RAM_CHUNKSIZE)*sizeof(z2ram_map[0]),
				GFP_KERNEL);
		if ( z2ram_map == NULL )
		{
		    printk( KERN_ERR DEVICE_NAME
			": cannot get mem for z2ram_map\n" );
		    goto err_out;
		}

		while (size) {
			z2ram_map[ z2ram_size++ ] = vaddr;
			size -= Z2RAM_CHUNKSIZE;
			vaddr += Z2RAM_CHUNKSIZE;
			list_count++;
		}

		if ( z2ram_size != 0 )
		    printk( KERN_INFO DEVICE_NAME
			": using %iK List Entry %d Memory\n",
			list_count * Z2RAM_CHUNK1024, index );
	} else

	switch ( device )
	{
	    case Z2MINOR_COMBINED:

		z2ram_map = kmalloc( max_z2_map + max_chip_map, GFP_KERNEL );
		if ( z2ram_map == NULL )
		{
		    printk( KERN_ERR DEVICE_NAME
			": cannot get mem for z2ram_map\n" );
		    goto err_out;
		}

		get_z2ram();
		get_chipram();

		if ( z2ram_size != 0 )
		    printk( KERN_INFO DEVICE_NAME 
			": using %iK Zorro II RAM and %iK Chip RAM (Total %dK)\n",
			z2_count * Z2RAM_CHUNK1024,
			chip_count * Z2RAM_CHUNK1024,
			( z2_count + chip_count ) * Z2RAM_CHUNK1024 );

	    break;

    	    case Z2MINOR_Z2ONLY:
		z2ram_map = kmalloc( max_z2_map, GFP_KERNEL );
		if ( z2ram_map == NULL )
		{
		    printk( KERN_ERR DEVICE_NAME
			": cannot get mem for z2ram_map\n" );
		    goto err_out;
		}

		get_z2ram();

		if ( z2ram_size != 0 )
		    printk( KERN_INFO DEVICE_NAME 
			": using %iK of Zorro II RAM\n",
			z2_count * Z2RAM_CHUNK1024 );

	    break;

	    case Z2MINOR_CHIPONLY:
		z2ram_map = kmalloc( max_chip_map, GFP_KERNEL );
		if ( z2ram_map == NULL )
		{
		    printk( KERN_ERR DEVICE_NAME
			": cannot get mem for z2ram_map\n" );
		    goto err_out;
		}

		get_chipram();

		if ( z2ram_size != 0 )
		    printk( KERN_INFO DEVICE_NAME 
			": using %iK Chip RAM\n",
			chip_count * Z2RAM_CHUNK1024 );
		    
	    break;

	    default:
		rc = -ENODEV;
		goto err_out;
	
	    break;
	}

	if ( z2ram_size == 0 )
	{
	    printk( KERN_NOTICE DEVICE_NAME
		": no unused ZII/Chip RAM found\n" );
	    goto err_out_kfree;
	}

	current_device = device;
	z2ram_size <<= Z2RAM_CHUNKSHIFT;
	set_capacity(z2ram_gendisk, z2ram_size >> 9);
    }

    mutex_unlock(&z2ram_mutex);
    return 0;

err_out_kfree:
    kfree(z2ram_map);
err_out:
    mutex_unlock(&z2ram_mutex);
    return rc;
}

static int
z2_release(struct gendisk *disk, fmode_t mode)
{
    mutex_lock(&z2ram_mutex);
    if ( current_device == -1 ) {
    	mutex_unlock(&z2ram_mutex);
    	return 0;
    }
    mutex_unlock(&z2ram_mutex);
    /*
     * FIXME: unmap memory
     */

    return 0;
}

static const struct block_device_operations z2_fops =
{
	.owner		= THIS_MODULE,
	.open		= z2_open,
	.release	= z2_release,
};

static struct kobject *z2_find(dev_t dev, int *part, void *data)
{
	*part = 0;
	return get_disk(z2ram_gendisk);
}

static struct request_queue *z2_queue;

static int __init 
z2_init(void)
{
    int ret;

    if (!MACH_IS_AMIGA)
	return -ENODEV;

    ret = -EBUSY;
    if (register_blkdev(Z2RAM_MAJOR, DEVICE_NAME))
	goto err;

    ret = -ENOMEM;
    z2ram_gendisk = alloc_disk(1);
    if (!z2ram_gendisk)
	goto out_disk;

    z2_queue = blk_init_queue(do_z2_request, &z2ram_lock);
    if (!z2_queue)
	goto out_queue;

    z2ram_gendisk->major = Z2RAM_MAJOR;
    z2ram_gendisk->first_minor = 0;
    z2ram_gendisk->fops = &z2_fops;
    sprintf(z2ram_gendisk->disk_name, "z2ram");

    z2ram_gendisk->queue = z2_queue;
    add_disk(z2ram_gendisk);
    blk_register_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT, THIS_MODULE,
				z2_find, NULL, NULL);

    return 0;

out_queue:
    put_disk(z2ram_gendisk);
out_disk:
    unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
err:
    return ret;
}

static void __exit z2_exit(void)
{
    int i, j;
    blk_unregister_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT);
    unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
    del_gendisk(z2ram_gendisk);
    put_disk(z2ram_gendisk);
    blk_cleanup_queue(z2_queue);

    if ( current_device != -1 )
    {
	i = 0;

	for ( j = 0 ; j < z2_count; j++ )
	{
	    set_bit( i++, zorro_unused_z2ram ); 
	}

	for ( j = 0 ; j < chip_count; j++ )
	{
	    if ( z2ram_map[ i ] )
	    {
		amiga_chip_free( (void *) z2ram_map[ i++ ] );
	    }
	}

	if ( z2ram_map != NULL )
	{
	    kfree( z2ram_map );
	}
    }

    return;
} 

module_init(z2_init);
module_exit(z2_exit);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	** z2ram - Amiga pseudo-driver to access 16bit-RAM in ZorroII space
	3	** as a block device, to be used as a RAM disk or swap space
	4	**
	5	** Copyright (C) 1994 by Ingo Wilken ([email protected])
	6	**
	7	** ++Geert: support for zorro_unused_z2ram, better range checking
	8	** ++roman: translate accesses via an array
	9	** ++Milan: support for ChipRAM usage
	10	** ++yambo: converted to 2.0 kernel
	11	** ++yambo: modularized and support added for 3 minor devices including:
	12	** MAJOR MINOR DESCRIPTION
	13	** ----- ----- ----------------------------------------------
	14	** 37 0 Use Zorro II and Chip ram
	15	** 37 1 Use only Zorro II ram
	16	** 37 2 Use only Chip ram
	17	** 37 4-7 Use memory list entry 1-4 (first is 0)
	18	** ++jskov: support for 1-4th memory list entry.
	19	**
	20	** Permission to use, copy, modify, and distribute this software and its
	21	** documentation for any purpose and without fee is hereby granted, provided
	22	** that the above copyright notice appear in all copies and that both that
	23	** copyright notice and this permission notice appear in supporting
	24	** documentation. This software is provided "as is" without express or
	25	** implied warranty.
	26	*/
	27
	28	#define DEVICE_NAME "Z2RAM"
	29
	30	#include <linux/major.h>
	31	#include <linux/vmalloc.h>
	32	#include <linux/init.h>
	33	#include <linux/module.h>
	34	#include <linux/blkdev.h>
	35	#include <linux/bitops.h>
2a48fc0a	36	#include <linux/mutex.h>
5a0e3ad6	37	#include <linux/slab.h>
1da177e4 LT	38
	39	#include <asm/setup.h>
	40	#include <asm/amigahw.h>
	41	#include <asm/pgtable.h>
	42
	43	#include <linux/zorro.h>
	44
	45
	46	extern int m68k_realnum_memory;
	47	extern struct mem_info m68k_memory[NUM_MEMINFO];
	48
1da177e4 LT	49	#define Z2MINOR_COMBINED (0)
	50	#define Z2MINOR_Z2ONLY (1)
	51	#define Z2MINOR_CHIPONLY (2)
	52	#define Z2MINOR_MEMLIST1 (4)
	53	#define Z2MINOR_MEMLIST2 (5)
	54	#define Z2MINOR_MEMLIST3 (6)
	55	#define Z2MINOR_MEMLIST4 (7)
	56	#define Z2MINOR_COUNT (8) /* Move this down when adding a new minor */
	57
	58	#define Z2RAM_CHUNK1024 ( Z2RAM_CHUNKSIZE >> 10 )
	59
2a48fc0a	60	static DEFINE_MUTEX(z2ram_mutex);
1da177e4 LT	61	static u_long *z2ram_map = NULL;
	62	static u_long z2ram_size = 0;
	63	static int z2_count = 0;
	64	static int chip_count = 0;
	65	static int list_count = 0;
	66	static int current_device = -1;
	67
	68	static DEFINE_SPINLOCK(z2ram_lock);
	69
1da177e4 LT	70	static struct gendisk *z2ram_gendisk;
1da177e4 LT	71
165125e1	72	static void do_z2_request(struct request_queue *q)
1da177e4 LT	73	{
1da177e4 LT	74	struct request *req;
fb3ac7f6	75
9934c8c0	76	req = blk_fetch_request(q);
fb3ac7f6	77	while (req) {
83096ebf	78	unsigned long start = blk_rq_pos(req) << 9;
1011c1b9	79	unsigned long len = blk_rq_cur_bytes(req);
fb3ac7f6	80	int err = 0;
1da177e4 LT	81
	82	if (start + len > z2ram_size) {
	83	printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n",
83096ebf	84	blk_rq_pos(req), blk_rq_cur_sectors(req));
fb3ac7f6 TH	85	err = -EIO;
fb3ac7f6 TH	86	goto done;
1da177e4 LT	87	}
	88	while (len) {
	89	unsigned long addr = start & Z2RAM_CHUNKMASK;
	90	unsigned long size = Z2RAM_CHUNKSIZE - addr;
	91	if (len < size)
	92	size = len;
	93	addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
	94	if (rq_data_dir(req) == READ)
	95	memcpy(req->buffer, (char *)addr, size);
	96	else
	97	memcpy((char *)addr, req->buffer, size);
	98	start += size;
	99	len -= size;
	100	}
fb3ac7f6	101	done:
9934c8c0 TH	102	if (!__blk_end_request_cur(req, err))
9934c8c0 TH	103	req = blk_fetch_request(q);
1da177e4 LT	104	}
	105	}
	106
	107	static void
	108	get_z2ram( void )
	109	{
	110	int i;
	111
	112	for ( i = 0; i < Z2RAM_SIZE / Z2RAM_CHUNKSIZE; i++ )
	113	{
	114	if ( test_bit( i, zorro_unused_z2ram ) )
	115	{
	116	z2_count++;
	117	z2ram_map[ z2ram_size++ ] =
	118	ZTWO_VADDR( Z2RAM_START ) + ( i << Z2RAM_CHUNKSHIFT );
	119	clear_bit( i, zorro_unused_z2ram );
	120	}
	121	}
	122
	123	return;
	124	}
	125
	126	static void
	127	get_chipram( void )
	128	{
	129
	130	while ( amiga_chip_avail() > ( Z2RAM_CHUNKSIZE * 4 ) )
	131	{
	132	chip_count++;
	133	z2ram_map[ z2ram_size ] =
	134	(u_long)amiga_chip_alloc( Z2RAM_CHUNKSIZE, "z2ram" );
	135
	136	if ( z2ram_map[ z2ram_size ] == 0 )
	137	{
	138	break;
	139	}
	140
	141	z2ram_size++;
	142	}
	143
	144	return;
	145	}
	146
ab746cb9	147	static int z2_open(struct block_device *bdev, fmode_t mode)
1da177e4 LT	148	{
	149	int device;
	150	int max_z2_map = ( Z2RAM_SIZE / Z2RAM_CHUNKSIZE ) *
	151	sizeof( z2ram_map[0] );
	152	int max_chip_map = ( amiga_chip_size / Z2RAM_CHUNKSIZE ) *
	153	sizeof( z2ram_map[0] );
	154	int rc = -ENOMEM;
	155
ab746cb9	156	device = MINOR(bdev->bd_dev);
1da177e4	157
2a48fc0a	158	mutex_lock(&z2ram_mutex);
1da177e4 LT	159	if ( current_device != -1 && current_device != device )
	160	{
	161	rc = -EBUSY;
	162	goto err_out;
	163	}
	164
	165	if ( current_device == -1 )
	166	{
	167	z2_count = 0;
	168	chip_count = 0;
	169	list_count = 0;
	170	z2ram_size = 0;
	171
	172	/* Use a specific list entry. */
	173	if (device >= Z2MINOR_MEMLIST1 && device <= Z2MINOR_MEMLIST4) {
	174	int index = device - Z2MINOR_MEMLIST1 + 1;
	175	unsigned long size, paddr, vaddr;
	176
	177	if (index >= m68k_realnum_memory) {
	178	printk( KERN_ERR DEVICE_NAME
	179	": no such entry in z2ram_map\n" );
	180	goto err_out;
	181	}
	182
	183	paddr = m68k_memory[index].addr;
	184	size = m68k_memory[index].size & ~(Z2RAM_CHUNKSIZE-1);
	185
	186	#ifdef __powerpc__
	187	/* FIXME: ioremap doesn't build correct memory tables. */
	188	{
	189	vfree(vmalloc (size));
	190	}
	191
	192	vaddr = (unsigned long) __ioremap (paddr, size,
	193	_PAGE_WRITETHRU);
	194
	195	#else
	196	vaddr = (unsigned long)z_remap_nocache_nonser(paddr, size);
	197	#endif
	198	z2ram_map =
	199	kmalloc((size/Z2RAM_CHUNKSIZE)*sizeof(z2ram_map[0]),
	200	GFP_KERNEL);
	201	if ( z2ram_map == NULL )
	202	{
	203	printk( KERN_ERR DEVICE_NAME
	204	": cannot get mem for z2ram_map\n" );
	205	goto err_out;
	206	}
	207
	208	while (size) {
	209	z2ram_map[ z2ram_size++ ] = vaddr;
	210	size -= Z2RAM_CHUNKSIZE;
	211	vaddr += Z2RAM_CHUNKSIZE;
	212	list_count++;
	213	}
	214
	215	if ( z2ram_size != 0 )
	216	printk( KERN_INFO DEVICE_NAME
	217	": using %iK List Entry %d Memory\n",
	218	list_count * Z2RAM_CHUNK1024, index );
	219	} else
	220
	221	switch ( device )
	222	{
223	case Z2MINOR_COMBINED:
224
225	z2ram_map = kmalloc( max_z2_map + max_chip_map, GFP_KERNEL );
226	if ( z2ram_map == NULL )
227	{
228	printk( KERN_ERR DEVICE_NAME
229	": cannot get mem for z2ram_map\n" );
230	goto err_out;
231	}
232
233	get_z2ram();
234	get_chipram();
235
236	if ( z2ram_size != 0 )
237	printk( KERN_INFO DEVICE_NAME
238	": using %iK Zorro II RAM and %iK Chip RAM (Total %dK)\n",
239	z2_count * Z2RAM_CHUNK1024,
240	chip_count * Z2RAM_CHUNK1024,
241	( z2_count + chip_count ) * Z2RAM_CHUNK1024 );
242
243	break;
244
245	case Z2MINOR_Z2ONLY:
246	z2ram_map = kmalloc( max_z2_map, GFP_KERNEL );
247	if ( z2ram_map == NULL )
248	{
249	printk( KERN_ERR DEVICE_NAME
250	": cannot get mem for z2ram_map\n" );
251	goto err_out;
252	}
253
254	get_z2ram();
255
256	if ( z2ram_size != 0 )
257	printk( KERN_INFO DEVICE_NAME
258	": using %iK of Zorro II RAM\n",
259	z2_count * Z2RAM_CHUNK1024 );
260
261	break;
262
263	case Z2MINOR_CHIPONLY:
264	z2ram_map = kmalloc( max_chip_map, GFP_KERNEL );
265	if ( z2ram_map == NULL )
266	{
267	printk( KERN_ERR DEVICE_NAME
268	": cannot get mem for z2ram_map\n" );
269	goto err_out;
270	}
271
272	get_chipram();
273
274	if ( z2ram_size != 0 )
275	printk( KERN_INFO DEVICE_NAME
276	": using %iK Chip RAM\n",
277	chip_count * Z2RAM_CHUNK1024 );
278
279	break;
280
281	default:
282	rc = -ENODEV;
283	goto err_out;
284
285	break;
286	}
287
288	if ( z2ram_size == 0 )
289	{
290	printk( KERN_NOTICE DEVICE_NAME
291	": no unused ZII/Chip RAM found\n" );
292	goto err_out_kfree;
293	}
294
295	current_device = device;
296	z2ram_size <<= Z2RAM_CHUNKSHIFT;
297	set_capacity(z2ram_gendisk, z2ram_size >> 9);
298	}
299
2a48fc0a	300	mutex_unlock(&z2ram_mutex);
1da177e4 LT	301	return 0;
	302
	303	err_out_kfree:
f9101210	304	kfree(z2ram_map);
1da177e4	305	err_out:
2a48fc0a	306	mutex_unlock(&z2ram_mutex);
1da177e4 LT	307	return rc;
	308	}
	309
	310	static int
ab746cb9	311	z2_release(struct gendisk *disk, fmode_t mode)
1da177e4	312	{
2a48fc0a	313	mutex_lock(&z2ram_mutex);
6e9624b8	314	if ( current_device == -1 ) {
2a48fc0a	315	mutex_unlock(&z2ram_mutex);
6e9624b8 AB	316	return 0;
6e9624b8 AB	317	}
2a48fc0a	318	mutex_unlock(&z2ram_mutex);
1da177e4 LT	319	/*
	320	* FIXME: unmap memory
	321	*/
	322
	323	return 0;
	324	}
	325
83d5cde4	326	static const struct block_device_operations z2_fops =
1da177e4 LT	327	{
1da177e4 LT	328	.owner = THIS_MODULE,
ab746cb9 AV	329	.open = z2_open,
ab746cb9 AV	330	.release = z2_release,
1da177e4 LT	331	};
	332
	333	static struct kobject z2_find(dev_t dev, int part, void *data)
	334	{
	335	*part = 0;
	336	return get_disk(z2ram_gendisk);
	337	}
	338
	339	static struct request_queue *z2_queue;
	340
f39d88ad	341	static int __init
1da177e4 LT	342	z2_init(void)
	343	{
	344	int ret;
	345
	346	if (!MACH_IS_AMIGA)
fd5b462f	347	return -ENODEV;
1da177e4 LT	348
	349	ret = -EBUSY;
	350	if (register_blkdev(Z2RAM_MAJOR, DEVICE_NAME))
	351	goto err;
	352
	353	ret = -ENOMEM;
	354	z2ram_gendisk = alloc_disk(1);
	355	if (!z2ram_gendisk)
	356	goto out_disk;
	357
	358	z2_queue = blk_init_queue(do_z2_request, &z2ram_lock);
	359	if (!z2_queue)
	360	goto out_queue;
	361
	362	z2ram_gendisk->major = Z2RAM_MAJOR;
	363	z2ram_gendisk->first_minor = 0;
	364	z2ram_gendisk->fops = &z2_fops;
	365	sprintf(z2ram_gendisk->disk_name, "z2ram");
1da177e4 LT	366
	367	z2ram_gendisk->queue = z2_queue;
	368	add_disk(z2ram_gendisk);
	369	blk_register_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT, THIS_MODULE,
	370	z2_find, NULL, NULL);
	371
	372	return 0;
	373
	374	out_queue:
	375	put_disk(z2ram_gendisk);
	376	out_disk:
	377	unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
	378	err:
	379	return ret;
	380	}
	381
f39d88ad	382	static void __exit z2_exit(void)
1da177e4 LT	383	{
1da177e4 LT	384	int i, j;
c9d4bc28	385	blk_unregister_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT);
00d59405	386	unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
1da177e4 LT	387	del_gendisk(z2ram_gendisk);
	388	put_disk(z2ram_gendisk);
	389	blk_cleanup_queue(z2_queue);
	390
	391	if ( current_device != -1 )
	392	{
	393	i = 0;
	394
	395	for ( j = 0 ; j < z2_count; j++ )
	396	{
	397	set_bit( i++, zorro_unused_z2ram );
	398	}
	399
	400	for ( j = 0 ; j < chip_count; j++ )
	401	{
	402	if ( z2ram_map[ i ] )
	403	{
	404	amiga_chip_free( (void *) z2ram_map[ i++ ] );
	405	}
	406	}
	407
	408	if ( z2ram_map != NULL )
	409	{
	410	kfree( z2ram_map );
	411	}
	412	}
	413
	414	return;
	415	}
f39d88ad AV	416
	417	module_init(z2_init);
	418	module_exit(z2_exit);
	419	MODULE_LICENSE("GPL");