[linux-2.6-block.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 (Ingo.Wilken@informatik.uni-oldenburg.de)
**
** ++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 <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 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 block_device_operations z2_fops;
static struct gendisk *z2ram_gendisk;

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

	req = elv_next_request(q);
	if (req)
		blkdev_dequeue_request(req);

	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 = elv_next_request(q);
			if (req)
				blkdev_dequeue_request(req);
		}
	}
}

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);

    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);
    }

    return 0;

err_out_kfree:
    kfree(z2ram_map);
err_out:
    return rc;
}

static int
z2_release(struct gendisk *disk, fmode_t mode)
{
    if ( current_device == -1 )
	return 0;     

    /*
     * FIXME: unmap memory
     */

    return 0;
}

static 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), 256);
    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 (Ingo.Wilken@informatik.uni-oldenburg.de)
	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>
	36
	37	#include <asm/setup.h>
	38	#include <asm/amigahw.h>
	39	#include <asm/pgtable.h>
	40
	41	#include <linux/zorro.h>
	42
	43
	44	extern int m68k_realnum_memory;
	45	extern struct mem_info m68k_memory[NUM_MEMINFO];
	46
1da177e4 LT	47	#define Z2MINOR_COMBINED (0)
	48	#define Z2MINOR_Z2ONLY (1)
	49	#define Z2MINOR_CHIPONLY (2)
	50	#define Z2MINOR_MEMLIST1 (4)
	51	#define Z2MINOR_MEMLIST2 (5)
	52	#define Z2MINOR_MEMLIST3 (6)
	53	#define Z2MINOR_MEMLIST4 (7)
	54	#define Z2MINOR_COUNT (8) /* Move this down when adding a new minor */
	55
	56	#define Z2RAM_CHUNK1024 ( Z2RAM_CHUNKSIZE >> 10 )
	57
	58	static u_long *z2ram_map = NULL;
	59	static u_long z2ram_size = 0;
	60	static int z2_count = 0;
	61	static int chip_count = 0;
	62	static int list_count = 0;
	63	static int current_device = -1;
	64
	65	static DEFINE_SPINLOCK(z2ram_lock);
	66
	67	static struct block_device_operations z2_fops;
	68	static struct gendisk *z2ram_gendisk;
	69
165125e1	70	static void do_z2_request(struct request_queue *q)
1da177e4 LT	71	{
1da177e4 LT	72	struct request *req;
fb3ac7f6 TH	73
	74	req = elv_next_request(q);
	75	if (req)
	76	blkdev_dequeue_request(req);
	77
	78	while (req) {
83096ebf	79	unsigned long start = blk_rq_pos(req) << 9;
1011c1b9	80	unsigned long len = blk_rq_cur_bytes(req);
fb3ac7f6	81	int err = 0;
1da177e4 LT	82
	83	if (start + len > z2ram_size) {
	84	printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n",
83096ebf	85	blk_rq_pos(req), blk_rq_cur_sectors(req));
fb3ac7f6 TH	86	err = -EIO;
fb3ac7f6 TH	87	goto done;
1da177e4 LT	88	}
	89	while (len) {
	90	unsigned long addr = start & Z2RAM_CHUNKMASK;
	91	unsigned long size = Z2RAM_CHUNKSIZE - addr;
	92	if (len < size)
	93	size = len;
	94	addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
	95	if (rq_data_dir(req) == READ)
	96	memcpy(req->buffer, (char *)addr, size);
	97	else
	98	memcpy((char *)addr, req->buffer, size);
	99	start += size;
	100	len -= size;
	101	}
fb3ac7f6 TH	102	done:
	103	if (!__blk_end_request_cur(req, err)) {
	104	req = elv_next_request(q);
	105	if (req)
	106	blkdev_dequeue_request(req);
	107	}
1da177e4 LT	108	}
	109	}
	110
	111	static void
	112	get_z2ram( void )
	113	{
	114	int i;
	115
	116	for ( i = 0; i < Z2RAM_SIZE / Z2RAM_CHUNKSIZE; i++ )
	117	{
	118	if ( test_bit( i, zorro_unused_z2ram ) )
	119	{
	120	z2_count++;
	121	z2ram_map[ z2ram_size++ ] =
	122	ZTWO_VADDR( Z2RAM_START ) + ( i << Z2RAM_CHUNKSHIFT );
	123	clear_bit( i, zorro_unused_z2ram );
	124	}
	125	}
	126
	127	return;
	128	}
	129
	130	static void
	131	get_chipram( void )
	132	{
	133
	134	while ( amiga_chip_avail() > ( Z2RAM_CHUNKSIZE * 4 ) )
	135	{
	136	chip_count++;
	137	z2ram_map[ z2ram_size ] =
	138	(u_long)amiga_chip_alloc( Z2RAM_CHUNKSIZE, "z2ram" );
	139
	140	if ( z2ram_map[ z2ram_size ] == 0 )
	141	{
	142	break;
	143	}
	144
	145	z2ram_size++;
	146	}
	147
	148	return;
	149	}
	150
ab746cb9	151	static int z2_open(struct block_device *bdev, fmode_t mode)
1da177e4 LT	152	{
	153	int device;
	154	int max_z2_map = ( Z2RAM_SIZE / Z2RAM_CHUNKSIZE ) *
	155	sizeof( z2ram_map[0] );
	156	int max_chip_map = ( amiga_chip_size / Z2RAM_CHUNKSIZE ) *
	157	sizeof( z2ram_map[0] );
	158	int rc = -ENOMEM;
	159
ab746cb9	160	device = MINOR(bdev->bd_dev);
1da177e4 LT	161
	162	if ( current_device != -1 && current_device != device )
	163	{
	164	rc = -EBUSY;
	165	goto err_out;
	166	}
	167
	168	if ( current_device == -1 )
	169	{
	170	z2_count = 0;
	171	chip_count = 0;
	172	list_count = 0;
	173	z2ram_size = 0;
	174
	175	/* Use a specific list entry. */
	176	if (device >= Z2MINOR_MEMLIST1 && device <= Z2MINOR_MEMLIST4) {
	177	int index = device - Z2MINOR_MEMLIST1 + 1;
	178	unsigned long size, paddr, vaddr;
	179
	180	if (index >= m68k_realnum_memory) {
	181	printk( KERN_ERR DEVICE_NAME
	182	": no such entry in z2ram_map\n" );
	183	goto err_out;
	184	}
	185
	186	paddr = m68k_memory[index].addr;
	187	size = m68k_memory[index].size & ~(Z2RAM_CHUNKSIZE-1);
	188
	189	#ifdef __powerpc__
	190	/* FIXME: ioremap doesn't build correct memory tables. */
	191	{
	192	vfree(vmalloc (size));
	193	}
	194
	195	vaddr = (unsigned long) __ioremap (paddr, size,
	196	_PAGE_WRITETHRU);
	197
	198	#else
	199	vaddr = (unsigned long)z_remap_nocache_nonser(paddr, size);
	200	#endif
	201	z2ram_map =
	202	kmalloc((size/Z2RAM_CHUNKSIZE)*sizeof(z2ram_map[0]),
	203	GFP_KERNEL);
	204	if ( z2ram_map == NULL )
	205	{
	206	printk( KERN_ERR DEVICE_NAME
	207	": cannot get mem for z2ram_map\n" );
	208	goto err_out;
	209	}
	210
	211	while (size) {
	212	z2ram_map[ z2ram_size++ ] = vaddr;
	213	size -= Z2RAM_CHUNKSIZE;
	214	vaddr += Z2RAM_CHUNKSIZE;
	215	list_count++;
	216	}
	217
	218	if ( z2ram_size != 0 )
	219	printk( KERN_INFO DEVICE_NAME
	220	": using %iK List Entry %d Memory\n",
	221	list_count * Z2RAM_CHUNK1024, index );
	222	} else
	223
	224	switch ( device )
225	{
226	case Z2MINOR_COMBINED:
227
228	z2ram_map = kmalloc( max_z2_map + max_chip_map, GFP_KERNEL );
229	if ( z2ram_map == NULL )
230	{
231	printk( KERN_ERR DEVICE_NAME
232	": cannot get mem for z2ram_map\n" );
233	goto err_out;
234	}
235
236	get_z2ram();
237	get_chipram();
238
239	if ( z2ram_size != 0 )
240	printk( KERN_INFO DEVICE_NAME
241	": using %iK Zorro II RAM and %iK Chip RAM (Total %dK)\n",
242	z2_count * Z2RAM_CHUNK1024,
243	chip_count * Z2RAM_CHUNK1024,
244	( z2_count + chip_count ) * Z2RAM_CHUNK1024 );
245
246	break;
247
248	case Z2MINOR_Z2ONLY:
249	z2ram_map = kmalloc( max_z2_map, GFP_KERNEL );
250	if ( z2ram_map == NULL )
251	{
252	printk( KERN_ERR DEVICE_NAME
253	": cannot get mem for z2ram_map\n" );
254	goto err_out;
255	}
256
257	get_z2ram();
258
259	if ( z2ram_size != 0 )
260	printk( KERN_INFO DEVICE_NAME
261	": using %iK of Zorro II RAM\n",
262	z2_count * Z2RAM_CHUNK1024 );
263
264	break;
265
266	case Z2MINOR_CHIPONLY:
267	z2ram_map = kmalloc( max_chip_map, GFP_KERNEL );
268	if ( z2ram_map == NULL )
269	{
270	printk( KERN_ERR DEVICE_NAME
271	": cannot get mem for z2ram_map\n" );
272	goto err_out;
273	}
274
275	get_chipram();
276
277	if ( z2ram_size != 0 )
278	printk( KERN_INFO DEVICE_NAME
279	": using %iK Chip RAM\n",
280	chip_count * Z2RAM_CHUNK1024 );
281
282	break;
283
284	default:
285	rc = -ENODEV;
286	goto err_out;
287
288	break;
289	}
290
291	if ( z2ram_size == 0 )
292	{
293	printk( KERN_NOTICE DEVICE_NAME
294	": no unused ZII/Chip RAM found\n" );
295	goto err_out_kfree;
296	}
297
298	current_device = device;
299	z2ram_size <<= Z2RAM_CHUNKSHIFT;
300	set_capacity(z2ram_gendisk, z2ram_size >> 9);
301	}
302
303	return 0;
304
305	err_out_kfree:
f9101210	306	kfree(z2ram_map);
1da177e4 LT	307	err_out:
	308	return rc;
	309	}
	310
	311	static int
ab746cb9	312	z2_release(struct gendisk *disk, fmode_t mode)
1da177e4 LT	313	{
	314	if ( current_device == -1 )
	315	return 0;
	316
	317	/*
	318	* FIXME: unmap memory
	319	*/
	320
	321	return 0;
	322	}
	323
	324	static struct block_device_operations z2_fops =
	325	{
	326	.owner = THIS_MODULE,
ab746cb9 AV	327	.open = z2_open,
ab746cb9 AV	328	.release = z2_release,
1da177e4 LT	329	};
	330
	331	static struct kobject z2_find(dev_t dev, int part, void *data)
	332	{
	333	*part = 0;
	334	return get_disk(z2ram_gendisk);
	335	}
	336
	337	static struct request_queue *z2_queue;
	338
f39d88ad	339	static int __init
1da177e4 LT	340	z2_init(void)
	341	{
	342	int ret;
	343
	344	if (!MACH_IS_AMIGA)
fd5b462f	345	return -ENODEV;
1da177e4 LT	346
	347	ret = -EBUSY;
	348	if (register_blkdev(Z2RAM_MAJOR, DEVICE_NAME))
	349	goto err;
	350
	351	ret = -ENOMEM;
	352	z2ram_gendisk = alloc_disk(1);
	353	if (!z2ram_gendisk)
	354	goto out_disk;
	355
	356	z2_queue = blk_init_queue(do_z2_request, &z2ram_lock);
	357	if (!z2_queue)
	358	goto out_queue;
	359
	360	z2ram_gendisk->major = Z2RAM_MAJOR;
	361	z2ram_gendisk->first_minor = 0;
	362	z2ram_gendisk->fops = &z2_fops;
	363	sprintf(z2ram_gendisk->disk_name, "z2ram");
1da177e4 LT	364
	365	z2ram_gendisk->queue = z2_queue;
	366	add_disk(z2ram_gendisk);
	367	blk_register_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT, THIS_MODULE,
	368	z2_find, NULL, NULL);
	369
	370	return 0;
	371
	372	out_queue:
	373	put_disk(z2ram_gendisk);
	374	out_disk:
	375	unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
	376	err:
	377	return ret;
	378	}
	379
f39d88ad	380	static void __exit z2_exit(void)
1da177e4 LT	381	{
	382	int i, j;
	383	blk_unregister_region(MKDEV(Z2RAM_MAJOR, 0), 256);
00d59405	384	unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
1da177e4 LT	385	del_gendisk(z2ram_gendisk);
	386	put_disk(z2ram_gendisk);
	387	blk_cleanup_queue(z2_queue);
	388
	389	if ( current_device != -1 )
	390	{
	391	i = 0;
	392
	393	for ( j = 0 ; j < z2_count; j++ )
	394	{
	395	set_bit( i++, zorro_unused_z2ram );
	396	}
	397
	398	for ( j = 0 ; j < chip_count; j++ )
	399	{
	400	if ( z2ram_map[ i ] )
	401	{
	402	amiga_chip_free( (void *) z2ram_map[ i++ ] );
	403	}
	404	}
	405
	406	if ( z2ram_map != NULL )
	407	{
	408	kfree( z2ram_map );
	409	}
	410	}
	411
	412	return;
	413	}
f39d88ad AV	414
	415	module_init(z2_init);
	416	module_exit(z2_exit);
	417	MODULE_LICENSE("GPL");