[deliverable/linux.git] / drivers / s390 / block / dasd_fba.c

/*
 * File...........: linux/drivers/s390/block/dasd_fba.c
 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
 * Bugreports.to..: <Linux390@de.ibm.com>
 * Copyright IBM Corp. 1999, 2009
 */

#define KMSG_COMPONENT "dasd"

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <asm/debug.h>

#include <linux/slab.h>
#include <linux/hdreg.h>	/* HDIO_GETGEO			    */
#include <linux/bio.h>
#include <linux/module.h>
#include <linux/init.h>

#include <asm/idals.h>
#include <asm/ebcdic.h>
#include <asm/io.h>
#include <asm/todclk.h>
#include <asm/ccwdev.h>

#include "dasd_int.h"
#include "dasd_fba.h"

#ifdef PRINTK_HEADER
#undef PRINTK_HEADER
#endif				/* PRINTK_HEADER */
#define PRINTK_HEADER "dasd(fba):"

#define DASD_FBA_CCW_WRITE 0x41
#define DASD_FBA_CCW_READ 0x42
#define DASD_FBA_CCW_LOCATE 0x43
#define DASD_FBA_CCW_DEFINE_EXTENT 0x63

MODULE_LICENSE("GPL");

static struct dasd_discipline dasd_fba_discipline;

struct dasd_fba_private {
	struct dasd_fba_characteristics rdc_data;
};

static struct ccw_device_id dasd_fba_ids[] = {
	{ CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},
	{ CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},
	{ /* end of list */ },
};

MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);

static struct ccw_driver dasd_fba_driver; /* see below */
static int
dasd_fba_probe(struct ccw_device *cdev)
{
	return dasd_generic_probe(cdev, &dasd_fba_discipline);
}

static int
dasd_fba_set_online(struct ccw_device *cdev)
{
	return dasd_generic_set_online(cdev, &dasd_fba_discipline);
}

static struct ccw_driver dasd_fba_driver = {
	.name        = "dasd-fba",
	.owner       = THIS_MODULE,
	.ids         = dasd_fba_ids,
	.probe       = dasd_fba_probe,
	.remove      = dasd_generic_remove,
	.set_offline = dasd_generic_set_offline,
	.set_online  = dasd_fba_set_online,
	.notify      = dasd_generic_notify,
	.freeze      = dasd_generic_pm_freeze,
	.thaw	     = dasd_generic_restore_device,
	.restore     = dasd_generic_restore_device,
};

static void
define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
	      int blksize, int beg, int nr)
{
	ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
	ccw->flags = 0;
	ccw->count = 16;
	ccw->cda = (__u32) __pa(data);
	memset(data, 0, sizeof (struct DE_fba_data));
	if (rw == WRITE)
		(data->mask).perm = 0x0;
	else if (rw == READ)
		(data->mask).perm = 0x1;
	else
		data->mask.perm = 0x2;
	data->blk_size = blksize;
	data->ext_loc = beg;
	data->ext_end = nr - 1;
}

static void
locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
	      int block_nr, int block_ct)
{
	ccw->cmd_code = DASD_FBA_CCW_LOCATE;
	ccw->flags = 0;
	ccw->count = 8;
	ccw->cda = (__u32) __pa(data);
	memset(data, 0, sizeof (struct LO_fba_data));
	if (rw == WRITE)
		data->operation.cmd = 0x5;
	else if (rw == READ)
		data->operation.cmd = 0x6;
	else
		data->operation.cmd = 0x8;
	data->blk_nr = block_nr;
	data->blk_ct = block_ct;
}

static int
dasd_fba_check_characteristics(struct dasd_device *device)
{
	struct dasd_block *block;
	struct dasd_fba_private *private;
	struct ccw_device *cdev = device->cdev;
	int rc;

	private = (struct dasd_fba_private *) device->private;
	if (!private) {
		private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
		if (!private) {
			dev_warn(&device->cdev->dev,
				 "Allocating memory for private DASD "
				 "data failed\n");
			return -ENOMEM;
		}
		device->private = (void *) private;
	} else {
		memset(private, 0, sizeof(*private));
	}
	block = dasd_alloc_block();
	if (IS_ERR(block)) {
		DBF_EVENT(DBF_WARNING, "could not allocate dasd block "
			  "structure for device: %s",
			  dev_name(&device->cdev->dev));
		device->private = NULL;
		kfree(private);
		return PTR_ERR(block);
	}
	device->block = block;
	block->base = device;

	/* Read Device Characteristics */
	rc = dasd_generic_read_dev_chars(device, "FBA ", &private->rdc_data,
					 32);
	if (rc) {
		DBF_EVENT(DBF_WARNING, "Read device characteristics returned "
			  "error %d for device: %s",
			  rc, dev_name(&device->cdev->dev));
		device->block = NULL;
		dasd_free_block(block);
		device->private = NULL;
		kfree(private);
		return rc;
	}

	dev_info(&device->cdev->dev,
		 "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
		 "and %d B/blk\n",
		 cdev->id.dev_type,
		 cdev->id.dev_model,
		 cdev->id.cu_type,
		 cdev->id.cu_model,
		 ((private->rdc_data.blk_bdsa *
		   (private->rdc_data.blk_size >> 9)) >> 11),
		 private->rdc_data.blk_size);
	return 0;
}

static int dasd_fba_do_analysis(struct dasd_block *block)
{
	struct dasd_fba_private *private;
	int sb, rc;

	private = (struct dasd_fba_private *) block->base->private;
	rc = dasd_check_blocksize(private->rdc_data.blk_size);
	if (rc) {
		DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
			    private->rdc_data.blk_size);
		return rc;
	}
	block->blocks = private->rdc_data.blk_bdsa;
	block->bp_block = private->rdc_data.blk_size;
	block->s2b_shift = 0;	/* bits to shift 512 to get a block */
	for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
		block->s2b_shift++;
	return 0;
}

static int dasd_fba_fill_geometry(struct dasd_block *block,
				  struct hd_geometry *geo)
{
	if (dasd_check_blocksize(block->bp_block) != 0)
		return -EINVAL;
	geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
	geo->heads = 16;
	geo->sectors = 128 >> block->s2b_shift;
	return 0;
}

static dasd_erp_fn_t
dasd_fba_erp_action(struct dasd_ccw_req * cqr)
{
	return dasd_default_erp_action;
}

static dasd_erp_fn_t
dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
{
	if (cqr->function == dasd_default_erp_action)
		return dasd_default_erp_postaction;

	DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",
		    cqr->function);
	return NULL;
}

static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
						   struct irb *irb)
{
	char mask;

	/* first of all check for state change pending interrupt */
	mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
	if ((irb->scsw.cmd.dstat & mask) == mask) {
		dasd_generic_handle_state_change(device);
		return;
	}

	/* check for unsolicited interrupts */
	DBF_DEV_EVENT(DBF_WARNING, device, "%s",
		    "unsolicited interrupt received");
	device->discipline->dump_sense_dbf(device, NULL, irb, "unsolicited");
	dasd_schedule_device_bh(device);
	return;
};

static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
					      struct dasd_block *block,
					      struct request *req)
{
	struct dasd_fba_private *private;
	unsigned long *idaws;
	struct LO_fba_data *LO_data;
	struct dasd_ccw_req *cqr;
	struct ccw1 *ccw;
	struct req_iterator iter;
	struct bio_vec *bv;
	char *dst;
	int count, cidaw, cplength, datasize;
	sector_t recid, first_rec, last_rec;
	unsigned int blksize, off;
	unsigned char cmd;

	private = (struct dasd_fba_private *) block->base->private;
	if (rq_data_dir(req) == READ) {
		cmd = DASD_FBA_CCW_READ;
	} else if (rq_data_dir(req) == WRITE) {
		cmd = DASD_FBA_CCW_WRITE;
	} else
		return ERR_PTR(-EINVAL);
	blksize = block->bp_block;
	/* Calculate record id of first and last block. */
	first_rec = blk_rq_pos(req) >> block->s2b_shift;
	last_rec =
		(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
	/* Check struct bio and count the number of blocks for the request. */
	count = 0;
	cidaw = 0;
	rq_for_each_segment(bv, req, iter) {
		if (bv->bv_len & (blksize - 1))
			/* Fba can only do full blocks. */
			return ERR_PTR(-EINVAL);
		count += bv->bv_len >> (block->s2b_shift + 9);
#if defined(CONFIG_64BIT)
		if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
			cidaw += bv->bv_len / blksize;
#endif
	}
	/* Paranoia. */
	if (count != last_rec - first_rec + 1)
		return ERR_PTR(-EINVAL);
	/* 1x define extent + 1x locate record + number of blocks */
	cplength = 2 + count;
	/* 1x define extent + 1x locate record */
	datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
		cidaw * sizeof(unsigned long);
	/*
	 * Find out number of additional locate record ccws if the device
	 * can't do data chaining.
	 */
	if (private->rdc_data.mode.bits.data_chain == 0) {
		cplength += count - 1;
		datasize += (count - 1)*sizeof(struct LO_fba_data);
	}
	/* Allocate the ccw request. */
	cqr = dasd_smalloc_request(dasd_fba_discipline.name,
				   cplength, datasize, memdev);
	if (IS_ERR(cqr))
		return cqr;
	ccw = cqr->cpaddr;
	/* First ccw is define extent. */
	define_extent(ccw++, cqr->data, rq_data_dir(req),
		      block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
	/* Build locate_record + read/write ccws. */
	idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
	LO_data = (struct LO_fba_data *) (idaws + cidaw);
	/* Locate record for all blocks for smart devices. */
	if (private->rdc_data.mode.bits.data_chain != 0) {
		ccw[-1].flags |= CCW_FLAG_CC;
		locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
	}
	recid = first_rec;
	rq_for_each_segment(bv, req, iter) {
		dst = page_address(bv->bv_page) + bv->bv_offset;
		if (dasd_page_cache) {
			char *copy = kmem_cache_alloc(dasd_page_cache,
						      GFP_DMA | __GFP_NOWARN);
			if (copy && rq_data_dir(req) == WRITE)
				memcpy(copy + bv->bv_offset, dst, bv->bv_len);
			if (copy)
				dst = copy + bv->bv_offset;
		}
		for (off = 0; off < bv->bv_len; off += blksize) {
			/* Locate record for stupid devices. */
			if (private->rdc_data.mode.bits.data_chain == 0) {
				ccw[-1].flags |= CCW_FLAG_CC;
				locate_record(ccw, LO_data++,
					      rq_data_dir(req),
					      recid - first_rec, 1);
				ccw->flags = CCW_FLAG_CC;
				ccw++;
			} else {
				if (recid > first_rec)
					ccw[-1].flags |= CCW_FLAG_DC;
				else
					ccw[-1].flags |= CCW_FLAG_CC;
			}
			ccw->cmd_code = cmd;
			ccw->count = block->bp_block;
			if (idal_is_needed(dst, blksize)) {
				ccw->cda = (__u32)(addr_t) idaws;
				ccw->flags = CCW_FLAG_IDA;
				idaws = idal_create_words(idaws, dst, blksize);
			} else {
				ccw->cda = (__u32)(addr_t) dst;
				ccw->flags = 0;
			}
			ccw++;
			dst += blksize;
			recid++;
		}
	}
	if (blk_noretry_request(req) ||
	    block->base->features & DASD_FEATURE_FAILFAST)
		set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
	cqr->startdev = memdev;
	cqr->memdev = memdev;
	cqr->block = block;
	cqr->expires = 5 * 60 * HZ;	/* 5 minutes */
	cqr->retries = 32;
	cqr->buildclk = get_clock();
	cqr->status = DASD_CQR_FILLED;
	return cqr;
}

static int
dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
{
	struct dasd_fba_private *private;
	struct ccw1 *ccw;
	struct req_iterator iter;
	struct bio_vec *bv;
	char *dst, *cda;
	unsigned int blksize, off;
	int status;

	if (!dasd_page_cache)
		goto out;
	private = (struct dasd_fba_private *) cqr->block->base->private;
	blksize = cqr->block->bp_block;
	ccw = cqr->cpaddr;
	/* Skip over define extent & locate record. */
	ccw++;
	if (private->rdc_data.mode.bits.data_chain != 0)
		ccw++;
	rq_for_each_segment(bv, req, iter) {
		dst = page_address(bv->bv_page) + bv->bv_offset;
		for (off = 0; off < bv->bv_len; off += blksize) {
			/* Skip locate record. */
			if (private->rdc_data.mode.bits.data_chain == 0)
				ccw++;
			if (dst) {
				if (ccw->flags & CCW_FLAG_IDA)
					cda = *((char **)((addr_t) ccw->cda));
				else
					cda = (char *)((addr_t) ccw->cda);
				if (dst != cda) {
					if (rq_data_dir(req) == READ)
						memcpy(dst, cda, bv->bv_len);
					kmem_cache_free(dasd_page_cache,
					    (void *)((addr_t)cda & PAGE_MASK));
				}
				dst = NULL;
			}
			ccw++;
		}
	}
out:
	status = cqr->status == DASD_CQR_DONE;
	dasd_sfree_request(cqr, cqr->memdev);
	return status;
}

static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
{
	cqr->status = DASD_CQR_FILLED;
};

static int
dasd_fba_fill_info(struct dasd_device * device,
		   struct dasd_information2_t * info)
{
	info->label_block = 1;
	info->FBA_layout = 1;
	info->format = DASD_FORMAT_LDL;
	info->characteristics_size = sizeof(struct dasd_fba_characteristics);
	memcpy(info->characteristics,
	       &((struct dasd_fba_private *) device->private)->rdc_data,
	       sizeof (struct dasd_fba_characteristics));
	info->confdata_size = 0;
	return 0;
}

static void
dasd_fba_dump_sense_dbf(struct dasd_device *device, struct dasd_ccw_req *req,
			 struct irb *irb, char *reason)
{
	int sl;
	if (irb->esw.esw0.erw.cons) {
		for (sl = 0; sl < 4; sl++) {
			DBF_DEV_EVENT(DBF_EMERG, device,
				      "%s: %08x %08x %08x %08x",
				      reason, irb->ecw[8 * 0], irb->ecw[8 * 1],
				      irb->ecw[8 * 2], irb->ecw[8 * 3]);
		}
	} else {
		DBF_DEV_EVENT(DBF_EMERG, device, "%s",
			      "SORRY - NO VALID SENSE AVAILABLE\n");
	}
}


static void
dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
		    struct irb *irb)
{
	char *page;
	struct ccw1 *act, *end, *last;
	int len, sl, sct, count;

	page = (char *) get_zeroed_page(GFP_ATOMIC);
	if (page == NULL) {
		DBF_DEV_EVENT(DBF_WARNING, device, "%s",
			    "No memory to dump sense data");
		return;
	}
	len = sprintf(page, KERN_ERR PRINTK_HEADER
		      " I/O status report for device %s:\n",
		      dev_name(&device->cdev->dev));
	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
		       " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
		       irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
		       " device %s: Failing CCW: %p\n",
		       dev_name(&device->cdev->dev),
		       (void *) (addr_t) irb->scsw.cmd.cpa);
	if (irb->esw.esw0.erw.cons) {
		for (sl = 0; sl < 4; sl++) {
			len += sprintf(page + len, KERN_ERR PRINTK_HEADER
				       " Sense(hex) %2d-%2d:",
				       (8 * sl), ((8 * sl) + 7));

			for (sct = 0; sct < 8; sct++) {
				len += sprintf(page + len, " %02x",
					       irb->ecw[8 * sl + sct]);
			}
			len += sprintf(page + len, "\n");
		}
	} else {
	        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
			       " SORRY - NO VALID SENSE AVAILABLE\n");
	}
	printk(KERN_ERR "%s", page);

	/* dump the Channel Program */
	/* print first CCWs (maximum 8) */
	act = req->cpaddr;
        for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
	end = min(act + 8, last);
	len = sprintf(page, KERN_ERR PRINTK_HEADER
		      " Related CP in req: %p\n", req);
	while (act <= end) {
		len += sprintf(page + len, KERN_ERR PRINTK_HEADER
			       " CCW %p: %08X %08X DAT:",
			       act, ((int *) act)[0], ((int *) act)[1]);
		for (count = 0; count < 32 && count < act->count;
		     count += sizeof(int))
			len += sprintf(page + len, " %08X",
				       ((int *) (addr_t) act->cda)
				       [(count>>2)]);
		len += sprintf(page + len, "\n");
		act++;
	}
	printk(KERN_ERR "%s", page);


	/* print failing CCW area */
	len = 0;
	if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
		act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
		len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
	}
	end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
	while (act <= end) {
		len += sprintf(page + len, KERN_ERR PRINTK_HEADER
			       " CCW %p: %08X %08X DAT:",
			       act, ((int *) act)[0], ((int *) act)[1]);
		for (count = 0; count < 32 && count < act->count;
		     count += sizeof(int))
			len += sprintf(page + len, " %08X",
				       ((int *) (addr_t) act->cda)
				       [(count>>2)]);
		len += sprintf(page + len, "\n");
		act++;
	}

	/* print last CCWs */
	if (act <  last - 2) {
		act = last - 2;
		len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
	}
	while (act <= last) {
		len += sprintf(page + len, KERN_ERR PRINTK_HEADER
			       " CCW %p: %08X %08X DAT:",
			       act, ((int *) act)[0], ((int *) act)[1]);
		for (count = 0; count < 32 && count < act->count;
		     count += sizeof(int))
			len += sprintf(page + len, " %08X",
				       ((int *) (addr_t) act->cda)
				       [(count>>2)]);
		len += sprintf(page + len, "\n");
		act++;
	}
	if (len > 0)
		printk(KERN_ERR "%s", page);
	free_page((unsigned long) page);
}

/*
 * max_blocks is dependent on the amount of storage that is available
 * in the static io buffer for each device. Currently each device has
 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
 * addition we have one define extent ccw + 16 bytes of data and a
 * locate record ccw for each block (stupid devices!) + 16 bytes of data.
 * That makes:
 * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
 * We want to fit two into the available memory so that we can immediately
 * start the next request if one finishes off. That makes 100.1 blocks
 * for one request. Give a little safety and the result is 96.
 */
static struct dasd_discipline dasd_fba_discipline = {
	.owner = THIS_MODULE,
	.name = "FBA ",
	.ebcname = "FBA ",
	.max_blocks = 96,
	.check_device = dasd_fba_check_characteristics,
	.do_analysis = dasd_fba_do_analysis,
	.fill_geometry = dasd_fba_fill_geometry,
	.start_IO = dasd_start_IO,
	.term_IO = dasd_term_IO,
	.handle_terminated_request = dasd_fba_handle_terminated_request,
	.erp_action = dasd_fba_erp_action,
	.erp_postaction = dasd_fba_erp_postaction,
	.handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
	.build_cp = dasd_fba_build_cp,
	.free_cp = dasd_fba_free_cp,
	.dump_sense = dasd_fba_dump_sense,
	.dump_sense_dbf = dasd_fba_dump_sense_dbf,
	.fill_info = dasd_fba_fill_info,
};

static int __init
dasd_fba_init(void)
{
	int ret;

	ASCEBC(dasd_fba_discipline.ebcname, 4);
	ret = ccw_driver_register(&dasd_fba_driver);
	if (!ret)
		wait_for_device_probe();

	return ret;
}

static void __exit
dasd_fba_cleanup(void)
{
	ccw_driver_unregister(&dasd_fba_driver);
}

module_init(dasd_fba_init);
module_exit(dasd_fba_cleanup);
Commit	Line	Data
138c014d	1	/*
1da177e4 LT	2	* File...........: linux/drivers/s390/block/dasd_fba.c
	3	* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
	4	* Bugreports.to..: <Linux390@de.ibm.com>
d41dd122	5	* Copyright IBM Corp. 1999, 2009
1da177e4 LT	6	*/
1da177e4 LT	7
fc19f381 SH	8	#define KMSG_COMPONENT "dasd"
fc19f381 SH	9
1da177e4 LT	10	#include <linux/stddef.h>
	11	#include <linux/kernel.h>
	12	#include <asm/debug.h>
	13
	14	#include <linux/slab.h>
	15	#include <linux/hdreg.h> /* HDIO_GETGEO */
	16	#include <linux/bio.h>
	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19
	20	#include <asm/idals.h>
	21	#include <asm/ebcdic.h>
	22	#include <asm/io.h>
	23	#include <asm/todclk.h>
	24	#include <asm/ccwdev.h>
	25
	26	#include "dasd_int.h"
	27	#include "dasd_fba.h"
	28
	29	#ifdef PRINTK_HEADER
	30	#undef PRINTK_HEADER
	31	#endif /* PRINTK_HEADER */
	32	#define PRINTK_HEADER "dasd(fba):"
	33
	34	#define DASD_FBA_CCW_WRITE 0x41
	35	#define DASD_FBA_CCW_READ 0x42
	36	#define DASD_FBA_CCW_LOCATE 0x43
	37	#define DASD_FBA_CCW_DEFINE_EXTENT 0x63
	38
	39	MODULE_LICENSE("GPL");
	40
	41	static struct dasd_discipline dasd_fba_discipline;
	42
	43	struct dasd_fba_private {
	44	struct dasd_fba_characteristics rdc_data;
	45	};
	46
	47	static struct ccw_device_id dasd_fba_ids[] = {
d2c993d8 HC	48	{ CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},
d2c993d8 HC	49	{ CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},
1da177e4 LT	50	{ /* end of list */ },
	51	};
	52
	53	MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);
	54
	55	static struct ccw_driver dasd_fba_driver; /* see below */
	56	static int
	57	dasd_fba_probe(struct ccw_device *cdev)
	58	{
40545573	59	return dasd_generic_probe(cdev, &dasd_fba_discipline);
1da177e4 LT	60	}
	61
	62	static int
	63	dasd_fba_set_online(struct ccw_device *cdev)
	64	{
40545573	65	return dasd_generic_set_online(cdev, &dasd_fba_discipline);
1da177e4 LT	66	}
	67
	68	static struct ccw_driver dasd_fba_driver = {
	69	.name = "dasd-fba",
	70	.owner = THIS_MODULE,
	71	.ids = dasd_fba_ids,
	72	.probe = dasd_fba_probe,
	73	.remove = dasd_generic_remove,
	74	.set_offline = dasd_generic_set_offline,
	75	.set_online = dasd_fba_set_online,
	76	.notify = dasd_generic_notify,
d41dd122 SH	77	.freeze = dasd_generic_pm_freeze,
	78	.thaw = dasd_generic_restore_device,
	79	.restore = dasd_generic_restore_device,
1da177e4 LT	80	};
1da177e4 LT	81
4d284cac	82	static void
1da177e4 LT	83	define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
	84	int blksize, int beg, int nr)
	85	{
	86	ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
	87	ccw->flags = 0;
	88	ccw->count = 16;
	89	ccw->cda = (__u32) __pa(data);
	90	memset(data, 0, sizeof (struct DE_fba_data));
	91	if (rw == WRITE)
	92	(data->mask).perm = 0x0;
	93	else if (rw == READ)
	94	(data->mask).perm = 0x1;
	95	else
	96	data->mask.perm = 0x2;
	97	data->blk_size = blksize;
	98	data->ext_loc = beg;
	99	data->ext_end = nr - 1;
	100	}
	101
4d284cac	102	static void
1da177e4 LT	103	locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
	104	int block_nr, int block_ct)
	105	{
	106	ccw->cmd_code = DASD_FBA_CCW_LOCATE;
	107	ccw->flags = 0;
	108	ccw->count = 8;
	109	ccw->cda = (__u32) __pa(data);
	110	memset(data, 0, sizeof (struct LO_fba_data));
	111	if (rw == WRITE)
	112	data->operation.cmd = 0x5;
	113	else if (rw == READ)
	114	data->operation.cmd = 0x6;
	115	else
	116	data->operation.cmd = 0x8;
	117	data->blk_nr = block_nr;
	118	data->blk_ct = block_ct;
	119	}
	120
	121	static int
	122	dasd_fba_check_characteristics(struct dasd_device *device)
	123	{
8e09f215	124	struct dasd_block *block;
1da177e4	125	struct dasd_fba_private *private;
138c014d	126	struct ccw_device *cdev = device->cdev;
1da177e4 LT	127	int rc;
	128
	129	private = (struct dasd_fba_private *) device->private;
92636b15 SO	130	if (!private) {
	131	private = kzalloc(sizeof(*private), GFP_KERNEL \| GFP_DMA);
	132	if (!private) {
fc19f381 SH	133	dev_warn(&device->cdev->dev,
	134	"Allocating memory for private DASD "
	135	"data failed\n");
1da177e4 LT	136	return -ENOMEM;
	137	}
	138	device->private = (void *) private;
92636b15 SO	139	} else {
92636b15 SO	140	memset(private, 0, sizeof(*private));
1da177e4	141	}
8e09f215 SW	142	block = dasd_alloc_block();
8e09f215 SW	143	if (IS_ERR(block)) {
fc19f381 SH	144	DBF_EVENT(DBF_WARNING, "could not allocate dasd block "
	145	"structure for device: %s",
	146	dev_name(&device->cdev->dev));
7337194f CH	147	device->private = NULL;
7337194f CH	148	kfree(private);
8e09f215 SW	149	return PTR_ERR(block);
	150	}
	151	device->block = block;
	152	block->base = device;
	153
1da177e4	154	/* Read Device Characteristics */
92636b15 SO	155	rc = dasd_generic_read_dev_chars(device, "FBA ", &private->rdc_data,
92636b15 SO	156	32);
1da177e4	157	if (rc) {
fc19f381 SH	158	DBF_EVENT(DBF_WARNING, "Read device characteristics returned "
	159	"error %d for device: %s",
	160	rc, dev_name(&device->cdev->dev));
7337194f CH	161	device->block = NULL;
	162	dasd_free_block(block);
	163	device->private = NULL;
	164	kfree(private);
1da177e4 LT	165	return rc;
	166	}
	167
fc19f381 SH	168	dev_info(&device->cdev->dev,
	169	"New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
	170	"and %d B/blk\n",
	171	cdev->id.dev_type,
	172	cdev->id.dev_model,
	173	cdev->id.cu_type,
	174	cdev->id.cu_model,
	175	((private->rdc_data.blk_bdsa *
	176	(private->rdc_data.blk_size >> 9)) >> 11),
	177	private->rdc_data.blk_size);
1da177e4 LT	178	return 0;
	179	}
	180
8e09f215	181	static int dasd_fba_do_analysis(struct dasd_block *block)
1da177e4 LT	182	{
	183	struct dasd_fba_private *private;
	184	int sb, rc;
	185
8e09f215	186	private = (struct dasd_fba_private *) block->base->private;
1da177e4 LT	187	rc = dasd_check_blocksize(private->rdc_data.blk_size);
1da177e4 LT	188	if (rc) {
fc19f381	189	DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
1da177e4 LT	190	private->rdc_data.blk_size);
	191	return rc;
	192	}
8e09f215 SW	193	block->blocks = private->rdc_data.blk_bdsa;
	194	block->bp_block = private->rdc_data.blk_size;
	195	block->s2b_shift = 0; /* bits to shift 512 to get a block */
1da177e4	196	for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
8e09f215	197	block->s2b_shift++;
1da177e4 LT	198	return 0;
	199	}
	200
8e09f215 SW	201	static int dasd_fba_fill_geometry(struct dasd_block *block,
8e09f215 SW	202	struct hd_geometry *geo)
1da177e4	203	{
8e09f215	204	if (dasd_check_blocksize(block->bp_block) != 0)
1da177e4	205	return -EINVAL;
8e09f215	206	geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
1da177e4	207	geo->heads = 16;
8e09f215	208	geo->sectors = 128 >> block->s2b_shift;
1da177e4 LT	209	return 0;
	210	}
	211
1da177e4 LT	212	static dasd_erp_fn_t
	213	dasd_fba_erp_action(struct dasd_ccw_req * cqr)
	214	{
	215	return dasd_default_erp_action;
	216	}
	217
	218	static dasd_erp_fn_t
	219	dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
	220	{
	221	if (cqr->function == dasd_default_erp_action)
	222	return dasd_default_erp_postaction;
	223
fc19f381	224	DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",
1da177e4 LT	225	cqr->function);
	226	return NULL;
	227	}
	228
8e09f215 SW	229	static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
	230	struct irb *irb)
	231	{
	232	char mask;
	233
	234	/* first of all check for state change pending interrupt */
	235	mask = DEV_STAT_ATTENTION \| DEV_STAT_DEV_END \| DEV_STAT_UNIT_EXCEP;
23d805b6	236	if ((irb->scsw.cmd.dstat & mask) == mask) {
8e09f215 SW	237	dasd_generic_handle_state_change(device);
	238	return;
	239	}
	240
	241	/* check for unsolicited interrupts */
fc19f381	242	DBF_DEV_EVENT(DBF_WARNING, device, "%s",
8e09f215	243	"unsolicited interrupt received");
fc19f381	244	device->discipline->dump_sense_dbf(device, NULL, irb, "unsolicited");
8e09f215 SW	245	dasd_schedule_device_bh(device);
	246	return;
	247	};
	248
	249	static struct dasd_ccw_req dasd_fba_build_cp(struct dasd_device memdev,
	250	struct dasd_block *block,
	251	struct request *req)
1da177e4 LT	252	{
	253	struct dasd_fba_private *private;
	254	unsigned long *idaws;
	255	struct LO_fba_data *LO_data;
	256	struct dasd_ccw_req *cqr;
	257	struct ccw1 *ccw;
5705f702	258	struct req_iterator iter;
1da177e4 LT	259	struct bio_vec *bv;
	260	char *dst;
	261	int count, cidaw, cplength, datasize;
	262	sector_t recid, first_rec, last_rec;
	263	unsigned int blksize, off;
	264	unsigned char cmd;
1da177e4	265
8e09f215	266	private = (struct dasd_fba_private *) block->base->private;
1da177e4 LT	267	if (rq_data_dir(req) == READ) {
	268	cmd = DASD_FBA_CCW_READ;
	269	} else if (rq_data_dir(req) == WRITE) {
	270	cmd = DASD_FBA_CCW_WRITE;
	271	} else
	272	return ERR_PTR(-EINVAL);
8e09f215	273	blksize = block->bp_block;
1da177e4	274	/* Calculate record id of first and last block. */
83096ebf TH	275	first_rec = blk_rq_pos(req) >> block->s2b_shift;
	276	last_rec =
	277	(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
1da177e4 LT	278	/* Check struct bio and count the number of blocks for the request. */
	279	count = 0;
	280	cidaw = 0;
5705f702	281	rq_for_each_segment(bv, req, iter) {
6c92e699 JA	282	if (bv->bv_len & (blksize - 1))
	283	/* Fba can only do full blocks. */
	284	return ERR_PTR(-EINVAL);
8e09f215	285	count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3	286	#if defined(CONFIG_64BIT)
6c92e699 JA	287	if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
6c92e699 JA	288	cidaw += bv->bv_len / blksize;
1da177e4	289	#endif
1da177e4 LT	290	}
	291	/* Paranoia. */
	292	if (count != last_rec - first_rec + 1)
	293	return ERR_PTR(-EINVAL);
	294	/* 1x define extent + 1x locate record + number of blocks */
	295	cplength = 2 + count;
	296	/* 1x define extent + 1x locate record */
	297	datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
	298	cidaw * sizeof(unsigned long);
	299	/*
	300	* Find out number of additional locate record ccws if the device
	301	* can't do data chaining.
	302	*/
	303	if (private->rdc_data.mode.bits.data_chain == 0) {
	304	cplength += count - 1;
	305	datasize += (count - 1)*sizeof(struct LO_fba_data);
	306	}
	307	/* Allocate the ccw request. */
	308	cqr = dasd_smalloc_request(dasd_fba_discipline.name,
8e09f215	309	cplength, datasize, memdev);
1da177e4 LT	310	if (IS_ERR(cqr))
	311	return cqr;
	312	ccw = cqr->cpaddr;
	313	/* First ccw is define extent. */
	314	define_extent(ccw++, cqr->data, rq_data_dir(req),
83096ebf	315	block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
1da177e4 LT	316	/* Build locate_record + read/write ccws. */
	317	idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
	318	LO_data = (struct LO_fba_data *) (idaws + cidaw);
	319	/* Locate record for all blocks for smart devices. */
	320	if (private->rdc_data.mode.bits.data_chain != 0) {
	321	ccw[-1].flags \|= CCW_FLAG_CC;
	322	locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
	323	}
	324	recid = first_rec;
5705f702	325	rq_for_each_segment(bv, req, iter) {
1da177e4 LT	326	dst = page_address(bv->bv_page) + bv->bv_offset;
	327	if (dasd_page_cache) {
	328	char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e	329	GFP_DMA \| __GFP_NOWARN);
1da177e4 LT	330	if (copy && rq_data_dir(req) == WRITE)
	331	memcpy(copy + bv->bv_offset, dst, bv->bv_len);
	332	if (copy)
	333	dst = copy + bv->bv_offset;
	334	}
	335	for (off = 0; off < bv->bv_len; off += blksize) {
	336	/* Locate record for stupid devices. */
	337	if (private->rdc_data.mode.bits.data_chain == 0) {
	338	ccw[-1].flags \|= CCW_FLAG_CC;
	339	locate_record(ccw, LO_data++,
	340	rq_data_dir(req),
	341	recid - first_rec, 1);
	342	ccw->flags = CCW_FLAG_CC;
	343	ccw++;
	344	} else {
	345	if (recid > first_rec)
	346	ccw[-1].flags \|= CCW_FLAG_DC;
	347	else
	348	ccw[-1].flags \|= CCW_FLAG_CC;
	349	}
	350	ccw->cmd_code = cmd;
8e09f215	351	ccw->count = block->bp_block;
1da177e4 LT	352	if (idal_is_needed(dst, blksize)) {
	353	ccw->cda = (__u32)(addr_t) idaws;
	354	ccw->flags = CCW_FLAG_IDA;
	355	idaws = idal_create_words(idaws, dst, blksize);
	356	} else {
	357	ccw->cda = (__u32)(addr_t) dst;
	358	ccw->flags = 0;
	359	}
	360	ccw++;
	361	dst += blksize;
	362	recid++;
	363	}
	364	}
13de227b HS	365	if (blk_noretry_request(req) \|\|
13de227b HS	366	block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5	367	set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215 SW	368	cqr->startdev = memdev;
	369	cqr->memdev = memdev;
	370	cqr->block = block;
1da177e4	371	cqr->expires = 5 * 60 * HZ; /* 5 minutes */
d61f6f3d HH	372	cqr->retries = 32;
d61f6f3d HH	373	cqr->buildclk = get_clock();
1da177e4 LT	374	cqr->status = DASD_CQR_FILLED;
	375	return cqr;
	376	}
	377
	378	static int
	379	dasd_fba_free_cp(struct dasd_ccw_req cqr, struct request req)
	380	{
	381	struct dasd_fba_private *private;
	382	struct ccw1 *ccw;
5705f702	383	struct req_iterator iter;
1da177e4 LT	384	struct bio_vec *bv;
	385	char dst, cda;
	386	unsigned int blksize, off;
5705f702	387	int status;
1da177e4 LT	388
	389	if (!dasd_page_cache)
	390	goto out;
8e09f215 SW	391	private = (struct dasd_fba_private *) cqr->block->base->private;
8e09f215 SW	392	blksize = cqr->block->bp_block;
1da177e4 LT	393	ccw = cqr->cpaddr;
	394	/* Skip over define extent & locate record. */
	395	ccw++;
	396	if (private->rdc_data.mode.bits.data_chain != 0)
	397	ccw++;
5705f702	398	rq_for_each_segment(bv, req, iter) {
1da177e4 LT	399	dst = page_address(bv->bv_page) + bv->bv_offset;
	400	for (off = 0; off < bv->bv_len; off += blksize) {
	401	/* Skip locate record. */
	402	if (private->rdc_data.mode.bits.data_chain == 0)
	403	ccw++;
	404	if (dst) {
	405	if (ccw->flags & CCW_FLAG_IDA)
	406	cda = ((char *)((addr_t) ccw->cda));
	407	else
	408	cda = (char *)((addr_t) ccw->cda);
	409	if (dst != cda) {
	410	if (rq_data_dir(req) == READ)
	411	memcpy(dst, cda, bv->bv_len);
	412	kmem_cache_free(dasd_page_cache,
	413	(void *)((addr_t)cda & PAGE_MASK));
	414	}
	415	dst = NULL;
	416	}
	417	ccw++;
	418	}
	419	}
	420	out:
	421	status = cqr->status == DASD_CQR_DONE;
8e09f215	422	dasd_sfree_request(cqr, cqr->memdev);
1da177e4 LT	423	return status;
	424	}
	425
8e09f215 SW	426	static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
	427	{
	428	cqr->status = DASD_CQR_FILLED;
	429	};
	430
1da177e4 LT	431	static int
	432	dasd_fba_fill_info(struct dasd_device * device,
	433	struct dasd_information2_t * info)
	434	{
	435	info->label_block = 1;
	436	info->FBA_layout = 1;
	437	info->format = DASD_FORMAT_LDL;
	438	info->characteristics_size = sizeof(struct dasd_fba_characteristics);
	439	memcpy(info->characteristics,
	440	&((struct dasd_fba_private *) device->private)->rdc_data,
	441	sizeof (struct dasd_fba_characteristics));
	442	info->confdata_size = 0;
	443	return 0;
	444	}
	445
fc19f381 SH	446	static void
	447	dasd_fba_dump_sense_dbf(struct dasd_device device, struct dasd_ccw_req req,
	448	struct irb irb, char reason)
	449	{
	450	int sl;
	451	if (irb->esw.esw0.erw.cons) {
	452	for (sl = 0; sl < 4; sl++) {
	453	DBF_DEV_EVENT(DBF_EMERG, device,
	454	"%s: %08x %08x %08x %08x",
	455	reason, irb->ecw[8 * 0], irb->ecw[8 * 1],
	456	irb->ecw[8 * 2], irb->ecw[8 * 3]);
	457	}
	458	} else {
	459	DBF_DEV_EVENT(DBF_EMERG, device, "%s",
	460	"SORRY - NO VALID SENSE AVAILABLE\n");
	461	}
	462	}
	463
	464
1da177e4 LT	465	static void
	466	dasd_fba_dump_sense(struct dasd_device device, struct dasd_ccw_req req,
	467	struct irb *irb)
	468	{
	469	char *page;
	470	struct ccw1 act, end, *last;
	471	int len, sl, sct, count;
	472
	473	page = (char *) get_zeroed_page(GFP_ATOMIC);
	474	if (page == NULL) {
fc19f381	475	DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4 LT	476	"No memory to dump sense data");
	477	return;
	478	}
	479	len = sprintf(page, KERN_ERR PRINTK_HEADER
	480	" I/O status report for device %s:\n",
2a0217d5	481	dev_name(&device->cdev->dev));
1da177e4 LT	482	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1da177e4 LT	483	" in req: %p CS: 0x%02X DS: 0x%02X\n", req,
23d805b6	484	irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
1da177e4 LT	485	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1da177e4 LT	486	" device %s: Failing CCW: %p\n",
2a0217d5	487	dev_name(&device->cdev->dev),
23d805b6	488	(void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4 LT	489	if (irb->esw.esw0.erw.cons) {
	490	for (sl = 0; sl < 4; sl++) {
	491	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
	492	" Sense(hex) %2d-%2d:",
	493	(8 * sl), ((8 * sl) + 7));
	494
	495	for (sct = 0; sct < 8; sct++) {
	496	len += sprintf(page + len, " %02x",
	497	irb->ecw[8 * sl + sct]);
	498	}
	499	len += sprintf(page + len, "\n");
	500	}
	501	} else {
	502	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
	503	" SORRY - NO VALID SENSE AVAILABLE\n");
	504	}
fc19f381	505	printk(KERN_ERR "%s", page);
1da177e4 LT	506
	507	/* dump the Channel Program */
	508	/* print first CCWs (maximum 8) */
	509	act = req->cpaddr;
	510	for (last = act; last->flags & (CCW_FLAG_CC \| CCW_FLAG_DC); last++);
	511	end = min(act + 8, last);
	512	len = sprintf(page, KERN_ERR PRINTK_HEADER
	513	" Related CP in req: %p\n", req);
	514	while (act <= end) {
	515	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
	516	" CCW %p: %08X %08X DAT:",
	517	act, ((int ) act)[0], ((int ) act)[1]);
	518	for (count = 0; count < 32 && count < act->count;
	519	count += sizeof(int))
	520	len += sprintf(page + len, " %08X",
	521	((int *) (addr_t) act->cda)
	522	[(count>>2)]);
	523	len += sprintf(page + len, "\n");
	524	act++;
	525	}
fc19f381	526	printk(KERN_ERR "%s", page);
1da177e4 LT	527
	528
	529	/* print failing CCW area */
	530	len = 0;
23d805b6 PO	531	if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) {
23d805b6 PO	532	act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2;
1da177e4 LT	533	len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
1da177e4 LT	534	}
23d805b6	535	end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last);
1da177e4 LT	536	while (act <= end) {
	537	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
	538	" CCW %p: %08X %08X DAT:",
	539	act, ((int ) act)[0], ((int ) act)[1]);
	540	for (count = 0; count < 32 && count < act->count;
	541	count += sizeof(int))
	542	len += sprintf(page + len, " %08X",
	543	((int *) (addr_t) act->cda)
	544	[(count>>2)]);
	545	len += sprintf(page + len, "\n");
	546	act++;
	547	}
	548
	549	/* print last CCWs */
	550	if (act < last - 2) {
	551	act = last - 2;
	552	len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
	553	}
	554	while (act <= last) {
	555	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
	556	" CCW %p: %08X %08X DAT:",
	557	act, ((int ) act)[0], ((int ) act)[1]);
	558	for (count = 0; count < 32 && count < act->count;
	559	count += sizeof(int))
	560	len += sprintf(page + len, " %08X",
	561	((int *) (addr_t) act->cda)
	562	[(count>>2)]);
	563	len += sprintf(page + len, "\n");
	564	act++;
	565	}
	566	if (len > 0)
fc19f381	567	printk(KERN_ERR "%s", page);
1da177e4 LT	568	free_page((unsigned long) page);
	569	}
	570
	571	/*
	572	* max_blocks is dependent on the amount of storage that is available
	573	* in the static io buffer for each device. Currently each device has
	574	* 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
	575	* 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
	576	* up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
138c014d	577	* addition we have one define extent ccw + 16 bytes of data and a
1da177e4 LT	578	* locate record ccw for each block (stupid devices!) + 16 bytes of data.
	579	* That makes:
	580	* (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
	581	* We want to fit two into the available memory so that we can immediately
	582	* start the next request if one finishes off. That makes 100.1 blocks
	583	* for one request. Give a little safety and the result is 96.
	584	*/
	585	static struct dasd_discipline dasd_fba_discipline = {
	586	.owner = THIS_MODULE,
	587	.name = "FBA ",
	588	.ebcname = "FBA ",
	589	.max_blocks = 96,
	590	.check_device = dasd_fba_check_characteristics,
	591	.do_analysis = dasd_fba_do_analysis,
	592	.fill_geometry = dasd_fba_fill_geometry,
	593	.start_IO = dasd_start_IO,
	594	.term_IO = dasd_term_IO,
8e09f215	595	.handle_terminated_request = dasd_fba_handle_terminated_request,
1da177e4 LT	596	.erp_action = dasd_fba_erp_action,
1da177e4 LT	597	.erp_postaction = dasd_fba_erp_postaction,
8e09f215	598	.handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
1da177e4 LT	599	.build_cp = dasd_fba_build_cp,
	600	.free_cp = dasd_fba_free_cp,
	601	.dump_sense = dasd_fba_dump_sense,
fc19f381	602	.dump_sense_dbf = dasd_fba_dump_sense_dbf,
1da177e4 LT	603	.fill_info = dasd_fba_fill_info,
	604	};
	605
	606	static int __init
	607	dasd_fba_init(void)
	608	{
736e6ea0 SO	609	int ret;
736e6ea0 SO	610
1da177e4	611	ASCEBC(dasd_fba_discipline.ebcname, 4);
736e6ea0 SO	612	ret = ccw_driver_register(&dasd_fba_driver);
	613	if (!ret)
	614	wait_for_device_probe();
	615
	616	return ret;
1da177e4 LT	617	}
	618
	619	static void __exit
	620	dasd_fba_cleanup(void)
	621	{
	622	ccw_driver_unregister(&dasd_fba_driver);
	623	}
	624
	625	module_init(dasd_fba_init);
	626	module_exit(dasd_fba_cleanup);