Commit 34c2b712 authored by Christof Schmitt's avatar Christof Schmitt Committed by James Bottomley
Browse files

[SCSI] zfcp: Introduce header file for qdio structs and inline functions 



Move the qdio related structs and some helper functions to a new
zfcp_qdio.h header file. While doing this, rename the struct
zfcp_queue_req to zfcp_qdio_req to adhere to the naming scheme used in
zfcp. This allows a better seperation of the qdio code and inlining
the helper functions will save some function calls.

Reviewed-by: default avatarSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: default avatarChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 2d8e62bb

drivers/s390/scsi/zfcp_dbf.c

+3 −3
Original line number Diff line number Diff line
@@ -140,9 +140,9 @@ void _zfcp_dbf_hba_fsf_response(const char *tag2, int level, 
	memcpy(response->fsf_status_qual,

	       fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);

	response->fsf_req_status = fsf_req->status;

	response->sbal_first = fsf_req->queue_req.sbal_first;

	response->sbal_last = fsf_req->queue_req.sbal_last;

	response->sbal_response = fsf_req->queue_req.sbal_response;

	response->sbal_first = fsf_req->qdio_req.sbal_first;

	response->sbal_last = fsf_req->qdio_req.sbal_last;

	response->sbal_response = fsf_req->qdio_req.sbal_response;

	response->pool = fsf_req->pool != NULL;

	response->erp_action = (unsigned long)fsf_req->erp_action;

drivers/s390/scsi/zfcp_def.h

+3 −54
Original line number Diff line number Diff line
@@ -33,11 +33,11 @@ 
#include <scsi/scsi_transport_fc.h>

#include <scsi/scsi_bsg_fc.h>

#include <asm/ccwdev.h>

#include <asm/qdio.h>

#include <asm/debug.h>

#include <asm/ebcdic.h>

#include <asm/sysinfo.h>

#include "zfcp_fsf.h"

#include "zfcp_qdio.h"



struct zfcp_reqlist;
@@ -127,12 +127,6 @@ struct zfcp_adapter_mempool { 
	mempool_t *qtcb_pool;

};



struct zfcp_qdio_queue {

	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];

	u8		   first;	/* index of next free bfr in queue */

	atomic_t           count;	/* number of free buffers in queue */

};



struct zfcp_erp_action {

	struct list_head list;

	int action;	              /* requested action code */
@@ -164,29 +158,6 @@ struct zfcp_latencies { 
	spinlock_t lock;

};



/** struct zfcp_qdio - basic QDIO data structure

 * @resp_q: response queue

 * @req_q: request queue

 * @stat_lock: lock to protect req_q_util and req_q_time

 * @req_q_lock; lock to serialize access to request queue

 * @req_q_time: time of last fill level change

 * @req_q_util: used for accounting

 * @req_q_full: queue full incidents

 * @req_q_wq: used to wait for SBAL availability

 * @adapter: adapter used in conjunction with this QDIO structure

 */

struct zfcp_qdio {

	struct zfcp_qdio_queue	resp_q;

	struct zfcp_qdio_queue	req_q;

	spinlock_t		stat_lock;

	spinlock_t		req_q_lock;

	unsigned long long	req_q_time;

	u64			req_q_util;

	atomic_t		req_q_full;

	wait_queue_head_t	req_q_wq;

	struct zfcp_adapter	*adapter;

};



struct zfcp_adapter {

	struct kref		ref;

	u64			peer_wwnn;	   /* P2P peer WWNN */
@@ -272,34 +243,12 @@ struct zfcp_unit { 
	struct work_struct	scsi_work;

};



/**

 * struct zfcp_queue_req - queue related values for a request

 * @sbal_number: number of free SBALs

 * @sbal_first: first SBAL for this request

 * @sbal_last: last SBAL for this request

 * @sbal_limit: last possible SBAL for this request

 * @sbale_curr: current SBALE at creation of this request

 * @sbal_response: SBAL used in interrupt

 * @qdio_outb_usage: usage of outbound queue

 * @qdio_inb_usage: usage of inbound queue

 */

struct zfcp_queue_req {

	u8		       sbal_number;

	u8		       sbal_first;

	u8		       sbal_last;

	u8		       sbal_limit;

	u8		       sbale_curr;

	u8		       sbal_response;

	u16		       qdio_outb_usage;

	u16		       qdio_inb_usage;

};



/**

 * struct zfcp_fsf_req - basic FSF request structure

 * @list: list of FSF requests

 * @req_id: unique request ID

 * @adapter: adapter this request belongs to

 * @queue_req: queue related values

 * @qdio_req: qdio queue related values

 * @completion: used to signal the completion of the request

 * @status: status of the request

 * @fsf_command: FSF command issued
@@ -317,7 +266,7 @@ struct zfcp_fsf_req { 
	struct list_head	list;

	unsigned long		req_id;

	struct zfcp_adapter	*adapter;

	struct zfcp_queue_req	queue_req;

	struct zfcp_qdio_req	qdio_req;

	struct completion	completion;

	u32			status;

	u32			fsf_command;

drivers/s390/scsi/zfcp_ext.h

+2 −6
Original line number Diff line number Diff line
@@ -143,13 +143,9 @@ extern void zfcp_fsf_reqid_check(struct zfcp_qdio *, int); 
/* zfcp_qdio.c */

extern int zfcp_qdio_setup(struct zfcp_adapter *);

extern void zfcp_qdio_destroy(struct zfcp_qdio *);

extern int zfcp_qdio_send(struct zfcp_qdio *, struct zfcp_queue_req *);

extern struct qdio_buffer_element

	*zfcp_qdio_sbale_req(struct zfcp_qdio *, struct zfcp_queue_req *);

extern struct qdio_buffer_element

	*zfcp_qdio_sbale_curr(struct zfcp_qdio *, struct zfcp_queue_req *);

extern int zfcp_qdio_send(struct zfcp_qdio *, struct zfcp_qdio_req *);

extern int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *,

				   struct zfcp_queue_req *, unsigned long,

				   struct zfcp_qdio_req *, unsigned long,

				   struct scatterlist *, int);

extern int zfcp_qdio_open(struct zfcp_qdio *);

extern void zfcp_qdio_close(struct zfcp_qdio *);

drivers/s390/scsi/zfcp_fsf.c

+36 −35
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include "zfcp_ext.h"

#include "zfcp_fc.h"

#include "zfcp_dbf.h"

#include "zfcp_qdio.h"

#include "zfcp_reqlist.h"



static void zfcp_fsf_request_timeout_handler(unsigned long data)
@@ -723,12 +724,12 @@ static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, 
	req->adapter = adapter;

	req->fsf_command = fsf_cmd;

	req->req_id = adapter->req_no;

	req->queue_req.sbal_number = 1;

	req->queue_req.sbal_first = req_q->first;

	req->queue_req.sbal_last = req_q->first;

	req->queue_req.sbale_curr = 1;

	req->qdio_req.sbal_number = 1;

	req->qdio_req.sbal_first = req_q->first;

	req->qdio_req.sbal_last = req_q->first;

	req->qdio_req.sbale_curr = 1;



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].addr = (void *) req->req_id;

	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
@@ -772,9 +773,9 @@ static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) 


	zfcp_reqlist_add(adapter->req_list, req);



	req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);

	req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);

	req->issued = get_clock();

	if (zfcp_qdio_send(qdio, &req->queue_req)) {

	if (zfcp_qdio_send(qdio, &req->qdio_req)) {

		del_timer(&req->timer);

		/* lookup request again, list might have changed */

		zfcp_reqlist_find_rm(adapter->req_list, req_id);
@@ -815,9 +816,9 @@ int zfcp_fsf_status_read(struct zfcp_qdio *qdio) 
		goto out;

	}



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;

	req->queue_req.sbale_curr = 2;

	req->qdio_req.sbale_curr = 2;



	sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);

	if (!sr_buf) {
@@ -826,7 +827,7 @@ int zfcp_fsf_status_read(struct zfcp_qdio *qdio) 
	}

	memset(sr_buf, 0, sizeof(*sr_buf));

	req->data = sr_buf;

	sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_curr(qdio, &req->qdio_req);

	sbale->addr = (void *) sr_buf;

	sbale->length = sizeof(*sr_buf);
@@ -923,7 +924,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, 
		       ZFCP_STATUS_COMMON_UNBLOCKED)))

		goto out_error_free;



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1018,7 +1019,7 @@ static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, 
{

	struct zfcp_adapter *adapter = req->adapter;

	struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,

							       &req->queue_req);

							       &req->qdio_req);

	u32 feat = adapter->adapter_features;

	int bytes;
@@ -1036,15 +1037,15 @@ static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, 
		return 0;

	}



	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,

	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,

					SBAL_FLAGS0_TYPE_WRITE_READ,

					sg_req, max_sbals);

	if (bytes <= 0)

		return -EIO;

	req->qtcb->bottom.support.req_buf_length = bytes;

	req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;

	req->qdio_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;



	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,

	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req,

					SBAL_FLAGS0_TYPE_WRITE_READ,

					sg_resp, max_sbals);

	req->qtcb->bottom.support.resp_buf_length = bytes;
@@ -1240,7 +1241,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1282,7 +1283,7 @@ int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio, 
		goto out_unlock;

	}



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;

	req->handler = zfcp_fsf_exchange_config_data_handler;
@@ -1338,7 +1339,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1387,7 +1388,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, 
	if (data)

		req->data = data;



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1502,7 +1503,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1572,7 +1573,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1649,7 +1650,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1704,7 +1705,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1798,7 +1799,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1971,7 +1972,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -2057,7 +2058,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) 
	}



	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;

	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -2100,8 +2101,8 @@ static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi) 
	blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;

	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)

		blktrc.flags |= ZFCP_BLK_REQ_ERROR;

	blktrc.inb_usage = req->queue_req.qdio_inb_usage;

	blktrc.outb_usage = req->queue_req.qdio_outb_usage;

	blktrc.inb_usage = req->qdio_req.qdio_inb_usage;

	blktrc.outb_usage = req->qdio_req.qdio_outb_usage;



	if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {

		blktrc.flags |= ZFCP_BLK_LAT_VALID;
@@ -2330,11 +2331,11 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, 
	fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;

	zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);



	real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,

	real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sbtype,

					     scsi_sglist(scsi_cmnd),

					     FSF_MAX_SBALS_PER_REQ);

	if (unlikely(real_bytes < 0)) {

		if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {

		if (req->qdio_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {

			dev_err(&adapter->ccw_device->dev,

				"Oversize data package, unit 0x%016Lx "

				"on port 0x%016Lx closed\n",
@@ -2399,7 +2400,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) 
	req->qtcb->bottom.io.service_class = FSF_CLASS_3;

	req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;

	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -2462,14 +2463,14 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, 


	req->handler = zfcp_fsf_control_file_handler;



	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);

	sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req);

	sbale[0].flags |= direction;



	bottom = &req->qtcb->bottom.support;

	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;

	bottom->option = fsf_cfdc->option;



	bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,

	bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req,

					direction, fsf_cfdc->sg,

					FSF_MAX_SBALS_PER_REQ);

	if (bytes != ZFCP_CFDC_MAX_SIZE) {
@@ -2517,8 +2518,8 @@ void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx) 
			panic("error: unknown req_id (%lx) on adapter %s.\n",

			      req_id, dev_name(&adapter->ccw_device->dev));



		fsf_req->queue_req.sbal_response = sbal_idx;

		fsf_req->queue_req.qdio_inb_usage =

		fsf_req->qdio_req.sbal_response = sbal_idx;

		fsf_req->qdio_req.qdio_inb_usage =

			atomic_read(&qdio->resp_q.count);

		zfcp_fsf_req_complete(fsf_req);

drivers/s390/scsi/zfcp_qdio.c

+9 −39
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt



#include "zfcp_ext.h"

#include "zfcp_qdio.h"



#define QBUFF_PER_PAGE		(PAGE_SIZE / sizeof(struct qdio_buffer))
@@ -28,12 +29,6 @@ static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal) 
	return 0;

}



static struct qdio_buffer_element *

zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx)

{

	return &q->sbal[sbal_idx]->element[sbale_idx];

}



static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id)

{

	struct zfcp_adapter *adapter = qdio->adapter;
@@ -145,32 +140,8 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err, 
	zfcp_qdio_resp_put_back(qdio, count);

}



/**

 * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req

 * @qdio: pointer to struct zfcp_qdio

 * @q_rec: pointer to struct zfcp_queue_rec

 * Returns: pointer to qdio_buffer_element (SBALE) structure

 */

struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_qdio *qdio,

						struct zfcp_queue_req *q_req)

{

	return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last, 0);

}



/**

 * zfcp_qdio_sbale_curr - return curr SBALE on req_q for a struct zfcp_fsf_req

 * @fsf_req: pointer to struct fsf_req

 * Returns: pointer to qdio_buffer_element (SBALE) structure

 */

struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_qdio *qdio,

						 struct zfcp_queue_req *q_req)

{

	return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last,

			       q_req->sbale_curr);

}



static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio,

				 struct zfcp_queue_req *q_req, int max_sbals)

				 struct zfcp_qdio_req *q_req, int max_sbals)

{

	int count = atomic_read(&qdio->req_q.count);

	count = min(count, max_sbals);
@@ -179,7 +150,7 @@ static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio, 
}



static struct qdio_buffer_element *

zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req,

zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req,

		     unsigned long sbtype)

{

	struct qdio_buffer_element *sbale;
@@ -214,7 +185,7 @@ zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req, 
}



static struct qdio_buffer_element *

zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req,

zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req,

		     unsigned int sbtype)

{

	if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL)
@@ -224,7 +195,7 @@ zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req, 
}



static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio,

				 struct zfcp_queue_req *q_req)

				 struct zfcp_qdio_req *q_req)

{

	struct qdio_buffer **sbal = qdio->req_q.sbal;

	int first = q_req->sbal_first;
@@ -235,7 +206,7 @@ static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio, 
}



static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio,

				struct zfcp_queue_req *q_req,

				struct zfcp_qdio_req *q_req,

				unsigned int sbtype, void *start_addr,

				unsigned int total_length)

{
@@ -271,8 +242,7 @@ static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio, 
 * @max_sbals: upper bound for number of SBALs to be used

 * Returns: number of bytes, or error (negativ)

 */

int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio,

			    struct zfcp_queue_req *q_req,

int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req,

			    unsigned long sbtype, struct scatterlist *sg,

			    int max_sbals)

{
@@ -304,10 +274,10 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, 
/**

 * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO

 * @qdio: pointer to struct zfcp_qdio

 * @q_req: pointer to struct zfcp_queue_req

 * @q_req: pointer to struct zfcp_qdio_req

 * Returns: 0 on success, error otherwise

 */

int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req)

int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req)

{

	struct zfcp_qdio_queue *req_q = &qdio->req_q;

	int first = q_req->sbal_first;

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