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[SCSI] zfcp: Simplify handling of ct and els requests 

Remove some redundancies in FC related code and trace:
- drop redundant data from SAN trace (local s_id that only changes
  during link down, ls_code that is already part of payload, d_id in
  ct response trace that is always the same as in ct request trace)
- use one common fsf struct to hold zfcp data for ct and els requests
- leverage common fsf struct for FC passthrough job data, allocate it
  with dd_bsg_data for passthrough requests and unify common code for
  ct and els passthrough request
- simplify callback handling in zfcp_fc

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt 2009-11-24 16:54:13 +01:00 committed by James Bottomley
parent 800c0cad96
commit 7c7dc19681
9 changed files with 160 additions and 285 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/s390/scsi/zfcp_dbf.c
View File

@ -179,7 +179,6 @@ void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
case FSF_QTCB_SEND_ELS:
send_els = (struct zfcp_send_els *)fsf_req->data;
response->u.els.d_id = ntoh24(qtcb->bottom.support.d_id);
response->u.els.ls_code = send_els->ls_code >> 24;
break;
case FSF_QTCB_ABORT_FCP_CMND:
@ -349,7 +348,6 @@ static void zfcp_dbf_hba_view_response(char **p,
case FSF_QTCB_SEND_ELS:
zfcp_dbf_out(p, "d_id", "0x%06x", r->u.els.d_id);
zfcp_dbf_out(p, "ls_code", "0x%02x", r->u.els.ls_code);
break;
case FSF_QTCB_ABORT_FCP_CMND:
@ -678,12 +676,12 @@ void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
/**
* zfcp_dbf_san_ct_request - trace event for issued CT request
* @fsf_req: request containing issued CT data
* @d_id: destination id where ct request is sent to
*/
void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req, u32 d_id)
{
struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
struct zfcp_fc_wka_port *wka_port = ct->wka_port;
struct zfcp_adapter *adapter = wka_port->adapter;
struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_dbf *dbf = adapter->dbf;
struct fc_ct_hdr *hdr = sg_virt(ct->req);
struct zfcp_dbf_san_record *r = &dbf->san_buf;
@ -696,8 +694,7 @@ void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
r->fsf_reqid = fsf_req->req_id;
r->fsf_seqno = fsf_req->seq_no;
r->s_id = fc_host_port_id(adapter->scsi_host);
r->d_id = wka_port->d_id;
oct->d_id = d_id;
oct->cmd_req_code = hdr->ct_cmd;
oct->revision = hdr->ct_rev;
oct->gs_type = hdr->ct_fs_type;
@ -718,9 +715,8 @@ void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
*/
void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
struct zfcp_fc_wka_port *wka_port = ct->wka_port;
struct zfcp_adapter *adapter = wka_port->adapter;
struct zfcp_fsf_ct_els *ct = (struct zfcp_fsf_ct_els *)fsf_req->data;
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fc_ct_hdr *hdr = sg_virt(ct->resp);
struct zfcp_dbf *dbf = adapter->dbf;
struct zfcp_dbf_san_record *r = &dbf->san_buf;
@ -733,8 +729,6 @@ void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
r->fsf_reqid = fsf_req->req_id;
r->fsf_seqno = fsf_req->seq_no;
r->s_id = wka_port->d_id;
r->d_id = fc_host_port_id(adapter->scsi_host);
rct->cmd_rsp_code = hdr->ct_cmd;
rct->revision = hdr->ct_rev;
rct->reason_code = hdr->ct_reason;
@ -750,8 +744,8 @@ void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
}
static void zfcp_dbf_san_els(const char *tag, int level,
struct zfcp_fsf_req *fsf_req, u32 s_id, u32 d_id,
u8 ls_code, void *buffer, int buflen)
struct zfcp_fsf_req *fsf_req, u32 d_id,
void *buffer, int buflen)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct zfcp_dbf *dbf = adapter->dbf;
@ -763,9 +757,7 @@ static void zfcp_dbf_san_els(const char *tag, int level,
strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
rec->fsf_reqid = fsf_req->req_id;
rec->fsf_seqno = fsf_req->seq_no;
rec->s_id = s_id;
rec->d_id = d_id;
rec->u.els.ls_code = ls_code;
rec->u.els.d_id = d_id;
debug_event(dbf->san, level, rec, sizeof(*rec));
zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
@ -778,12 +770,11 @@ static void zfcp_dbf_san_els(const char *tag, int level,
*/
void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
zfcp_dbf_san_els("oels", 2, fsf_req,
fc_host_port_id(els->adapter->scsi_host),
els->d_id, *(u8 *) sg_virt(els->req),
sg_virt(els->req), els->req->length);
zfcp_dbf_san_els("oels", 2, fsf_req, d_id,
sg_virt(els->req), els->req->length);
}
/**
@ -792,12 +783,11 @@ void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
*/
void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
struct zfcp_fsf_ct_els *els = (struct zfcp_fsf_ct_els *)fsf_req->data;
u32 d_id = ntoh24(fsf_req->qtcb->bottom.support.d_id);
zfcp_dbf_san_els("rels", 2, fsf_req, els->d_id,
fc_host_port_id(els->adapter->scsi_host),
*(u8 *)sg_virt(els->req), sg_virt(els->resp),
els->resp->length);
zfcp_dbf_san_els("rels", 2, fsf_req, d_id,
sg_virt(els->resp), els->resp->length);
}
/**
@ -806,16 +796,13 @@ void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
*/
void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
{
struct zfcp_adapter *adapter = fsf_req->adapter;
struct fsf_status_read_buffer *buf =
(struct fsf_status_read_buffer *)fsf_req->data;
int length = (int)buf->length -
(int)((void *)&buf->payload - (void *)buf);
zfcp_dbf_san_els("iels", 1, fsf_req, ntoh24(buf->d_id),
fc_host_port_id(adapter->scsi_host),
buf->payload.data[0], (void *)buf->payload.data,
length);
(void *)buf->payload.data, length);
}
static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
@ -830,11 +817,10 @@ static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
zfcp_dbf_tag(&p, "tag", r->tag);
zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
zfcp_dbf_out(&p, "s_id", "0x%06x", r->s_id);
zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
zfcp_dbf_out(&p, "d_id", "0x%06x", ct->d_id);
zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
@ -853,7 +839,7 @@ static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
struct zfcp_dbf_san_record_els *els = &r->u.els;
zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
zfcp_dbf_out(&p, "d_id", "0x%06x", els->d_id);
}
return p - out_buf;
}

7
drivers/s390/scsi/zfcp_dbf.h
View File

@ -123,7 +123,6 @@ struct zfcp_dbf_hba_record_response {
} unit;
struct {
u32 d_id;
u8 ls_code;
} els;
} u;
} __attribute__ ((packed));
@ -167,6 +166,7 @@ struct zfcp_dbf_san_record_ct_request {
u8 options;
u16 max_res_size;
u32 len;
u32 d_id;
} __attribute__ ((packed));
struct zfcp_dbf_san_record_ct_response {
@ -180,16 +180,13 @@ struct zfcp_dbf_san_record_ct_response {
} __attribute__ ((packed));
struct zfcp_dbf_san_record_els {
u8 ls_code;
u32 len;
u32 d_id;
} __attribute__ ((packed));
struct zfcp_dbf_san_record {
u8 tag[ZFCP_DBF_TAG_SIZE];
u64 fsf_reqid;
u32 fsf_seqno;
u32 s_id;
u32 d_id;
union {
struct zfcp_dbf_san_record_ct_request ct_req;
struct zfcp_dbf_san_record_ct_response ct_resp;

46
drivers/s390/scsi/zfcp_def.h
View File

@ -132,52 +132,6 @@ struct zfcp_adapter_mempool {
mempool_t *qtcb_pool;
};
/**
* struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
* @wka_port: port where the request is sent to
* @req: scatter-gather list for request
* @resp: scatter-gather list for response
* @handler: handler function (called for response to the request)
* @handler_data: data passed to handler function
* @completion: completion for synchronization purposes
* @status: used to pass error status to calling function
*/
struct zfcp_send_ct {
struct zfcp_fc_wka_port *wka_port;
struct scatterlist *req;
struct scatterlist *resp;
void (*handler)(unsigned long);
unsigned long handler_data;
struct completion *completion;
int status;
};
/**
* struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
* @adapter: adapter where request is sent from
* @port: port where ELS is destinated (port reference count has to be increased)
* @d_id: destiniation id of port where request is sent to
* @req: scatter-gather list for request
* @resp: scatter-gather list for response
* @handler: handler function (called for response to the request)
* @handler_data: data passed to handler function
* @completion: completion for synchronization purposes
* @ls_code: hex code of ELS command
* @status: used to pass error status to calling function
*/
struct zfcp_send_els {
struct zfcp_adapter *adapter;
struct zfcp_port *port;
u32 d_id;
struct scatterlist *req;
struct scatterlist *resp;
void (*handler)(unsigned long);
unsigned long handler_data;
struct completion *completion;
int ls_code;
int status;
};
struct zfcp_qdio_queue {
struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
u8 first; /* index of next free bfr in queue */

12
drivers/s390/scsi/zfcp_ext.h
View File

@ -12,6 +12,7 @@
#include <linux/types.h>
#include <scsi/fc/fc_els.h>
#include "zfcp_def.h"
#include "zfcp_fc.h"
/* zfcp_aux.c */
extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, u64);
@ -55,7 +56,7 @@ extern void _zfcp_dbf_hba_fsf_unsol(const char *, int level, struct zfcp_dbf *,
struct fsf_status_read_buffer *);
extern void zfcp_dbf_hba_qdio(struct zfcp_dbf *, unsigned int, int, int);
extern void zfcp_dbf_hba_berr(struct zfcp_dbf *, struct zfcp_fsf_req *);
extern void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *);
extern void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *, u32);
extern void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *);
extern void zfcp_dbf_san_els_request(struct zfcp_fsf_req *);
extern void zfcp_dbf_san_els_response(struct zfcp_fsf_req *);
@ -106,8 +107,7 @@ extern void zfcp_fc_link_test_work(struct work_struct *);
extern void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *);
extern int zfcp_fc_gs_setup(struct zfcp_adapter *);
extern void zfcp_fc_gs_destroy(struct zfcp_adapter *);
extern int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *);
extern int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *);
extern int zfcp_fc_exec_bsg_job(struct fc_bsg_job *);
/* zfcp_fsf.c */
extern int zfcp_fsf_open_port(struct zfcp_erp_action *);
@ -128,8 +128,10 @@ extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *,
extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
extern int zfcp_fsf_status_read(struct zfcp_qdio *);
extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *);
extern int zfcp_fsf_send_els(struct zfcp_send_els *);
extern int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *, struct zfcp_fsf_ct_els *,
mempool_t *);
extern int zfcp_fsf_send_els(struct zfcp_adapter *, u32,
struct zfcp_fsf_ct_els *);
extern int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *,
struct scsi_cmnd *);
extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);

253
drivers/s390/scsi/zfcp_fc.c
View File

@ -22,12 +22,6 @@ static u32 zfcp_fc_rscn_range_mask[] = {
[ELS_ADDR_FMT_FAB] = 0x000000,
};
struct zfcp_fc_ns_handler_data {
struct completion done;
void (*handler)(unsigned long);
unsigned long handler_data;
};
static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
{
if (mutex_lock_interruptible(&wka_port->mutex))
@ -211,21 +205,10 @@ void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
zfcp_fc_incoming_rscn(fsf_req);
}
static void zfcp_fc_ns_handler(unsigned long data)
static void zfcp_fc_ns_gid_pn_eval(void *data)
{
struct zfcp_fc_ns_handler_data *compl_rec =
(struct zfcp_fc_ns_handler_data *) data;
if (compl_rec->handler)
compl_rec->handler(compl_rec->handler_data);
complete(&compl_rec->done);
}
static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
{
struct zfcp_fc_gid_pn *gid_pn = (struct zfcp_fc_gid_pn *) data;
struct zfcp_send_ct *ct = &gid_pn->ct;
struct zfcp_fc_gid_pn *gid_pn = data;
struct zfcp_fsf_ct_els *ct = &gid_pn->ct;
struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req);
struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp);
struct zfcp_port *port = gid_pn->port;
@ -242,18 +225,22 @@ static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid);
}
static void zfcp_fc_complete(void *data)
{
complete(data);
}
static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
struct zfcp_fc_gid_pn *gid_pn)
{
struct zfcp_adapter *adapter = port->adapter;
struct zfcp_fc_ns_handler_data compl_rec;
DECLARE_COMPLETION_ONSTACK(completion);
int ret;
/* setup parameters for send generic command */
gid_pn->port = port;
gid_pn->ct.wka_port = &adapter->gs->ds;
gid_pn->ct.handler = zfcp_fc_ns_handler;
gid_pn->ct.handler_data = (unsigned long) &compl_rec;
gid_pn->ct.handler = zfcp_fc_complete;
gid_pn->ct.handler_data = &completion;
gid_pn->ct.req = &gid_pn->sg_req;
gid_pn->ct.resp = &gid_pn->sg_resp;
sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req,
@ -270,12 +257,12 @@ static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4;
gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn;
init_completion(&compl_rec.done);
compl_rec.handler = zfcp_fc_ns_gid_pn_eval;
compl_rec.handler_data = (unsigned long) gid_pn;
ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req);
if (!ret)
wait_for_completion(&compl_rec.done);
ret = zfcp_fsf_send_ct(&adapter->gs->ds, &gid_pn->ct,
adapter->pool.gid_pn_req);
if (!ret) {
wait_for_completion(&completion);
zfcp_fc_ns_gid_pn_eval(gid_pn);
}
return ret;
}
@ -374,9 +361,9 @@ void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
port->supported_classes |= FC_COS_CLASS4;
}
static void zfcp_fc_adisc_handler(unsigned long data)
static void zfcp_fc_adisc_handler(void *data)
{
struct zfcp_fc_els_adisc *adisc = (struct zfcp_fc_els_adisc *) data;
struct zfcp_fc_els_adisc *adisc = data;
struct zfcp_port *port = adisc->els.port;
struct fc_els_adisc *adisc_resp = &adisc->adisc_resp;
@ -414,6 +401,7 @@ static int zfcp_fc_adisc(struct zfcp_port *port)
if (!adisc)
return -ENOMEM;
adisc->els.port = port;
adisc->els.req = &adisc->req;
adisc->els.resp = &adisc->resp;
sg_init_one(adisc->els.req, &adisc->adisc_req,
@ -421,21 +409,18 @@ static int zfcp_fc_adisc(struct zfcp_port *port)
sg_init_one(adisc->els.resp, &adisc->adisc_resp,
sizeof(struct fc_els_adisc));
adisc->els.adapter = adapter;
adisc->els.port = port;
adisc->els.d_id = port->d_id;
adisc->els.handler = zfcp_fc_adisc_handler;
adisc->els.handler_data = (unsigned long) adisc;
adisc->els.ls_code = adisc->adisc_req.adisc_cmd = ELS_ADISC;
adisc->els.handler_data = adisc;
/* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
without FC-AL-2 capability, so we don't set it */
adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host);
adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host);
adisc->adisc_req.adisc_cmd = ELS_ADISC;
hton24(adisc->adisc_req.adisc_port_id,
fc_host_port_id(adapter->scsi_host));
return zfcp_fsf_send_els(&adisc->els);
return zfcp_fsf_send_els(adapter, port->d_id, &adisc->els);
}
void zfcp_fc_link_test_work(struct work_struct *work)
@ -520,9 +505,9 @@ out:
static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft,
struct zfcp_adapter *adapter, int max_bytes)
{
struct zfcp_send_ct *ct = &gpn_ft->ct;
struct zfcp_fsf_ct_els *ct = &gpn_ft->ct;
struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
struct zfcp_fc_ns_handler_data compl_rec;
DECLARE_COMPLETION_ONSTACK(completion);
int ret;
/* prepare CT IU for GPN_FT */
@ -537,17 +522,14 @@ static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft,
req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
/* prepare zfcp_send_ct */
ct->wka_port = &adapter->gs->ds;
ct->handler = zfcp_fc_ns_handler;
ct->handler_data = (unsigned long)&compl_rec;
ct->handler = zfcp_fc_complete;
ct->handler_data = &completion;
ct->req = &gpn_ft->sg_req;
ct->resp = gpn_ft->sg_resp;
init_completion(&compl_rec.done);
compl_rec.handler = NULL;
ret = zfcp_fsf_send_ct(ct, NULL);
ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct, NULL);
if (!ret)
wait_for_completion(&compl_rec.done);
wait_for_completion(&completion);
return ret;
}
@ -565,13 +547,13 @@ static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
list_move_tail(&port->list, lh);
}
static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, int max_entries)
static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft,
struct zfcp_adapter *adapter, int max_entries)
{
struct zfcp_send_ct *ct = &gpn_ft->ct;
struct zfcp_fsf_ct_els *ct = &gpn_ft->ct;
struct scatterlist *sg = gpn_ft->sg_resp;
struct fc_ct_hdr *hdr = sg_virt(sg);
struct fc_gpn_ft_resp *acc = sg_virt(sg);
struct zfcp_adapter *adapter = ct->wka_port->adapter;
struct zfcp_port *port, *tmp;
unsigned long flags;
LIST_HEAD(remove_lh);
@ -665,7 +647,7 @@ void zfcp_fc_scan_ports(struct work_struct *work)
for (i = 0; i < 3; i++) {
ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes);
if (!ret) {
ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries);
ret = zfcp_fc_eval_gpn_ft(gpn_ft, adapter, max_entries);
if (ret == -EAGAIN)
ssleep(1);
else
@ -677,160 +659,109 @@ out:
zfcp_fc_wka_port_put(&adapter->gs->ds);
}
struct zfcp_els_fc_job {
struct zfcp_send_els els;
struct fc_bsg_job *job;
};
static void zfcp_fc_generic_els_handler(unsigned long data)
static void zfcp_fc_ct_els_job_handler(void *data)
{
struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data;
struct fc_bsg_job *job = els_fc_job->job;
struct fc_bsg_reply *reply = job->reply;
struct fc_bsg_job *job = data;
struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
int status = zfcp_ct_els->status;
int reply_status;
if (els_fc_job->els.status) {
/* request rejected or timed out */
reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT;
goto out;
}
reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
reply->reply_payload_rcv_len = job->reply_payload.payload_len;
out:
job->state_flags = FC_RQST_STATE_DONE;
reply_status = status ? FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK;
job->reply->reply_data.ctels_reply.status = reply_status;
job->reply->reply_payload_rcv_len = job->reply_payload.payload_len;
job->job_done(job);
kfree(els_fc_job);
}
int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job)
static int zfcp_fc_exec_els_job(struct fc_bsg_job *job,
struct zfcp_adapter *adapter)
{
struct zfcp_els_fc_job *els_fc_job;
struct zfcp_fsf_ct_els *els = job->dd_data;
struct fc_rport *rport = job->rport;
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_port *port;
u8 *port_did;
u32 d_id;
shost = rport ? rport_to_shost(rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL);
if (!els_fc_job)
return -ENOMEM;
els_fc_job->els.adapter = adapter;
if (rport) {
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
if (!port) {
kfree(els_fc_job);
if (!port)
return -EINVAL;
}
els_fc_job->els.d_id = port->d_id;
d_id = port->d_id;
put_device(&port->sysfs_device);
} else {
port_did = job->request->rqst_data.h_els.port_id;
els_fc_job->els.d_id = (port_did[0] << 16) +
(port_did[1] << 8) + port_did[2];
}
} else
d_id = ntoh24(job->request->rqst_data.h_els.port_id);
els_fc_job->els.req = job->request_payload.sg_list;
els_fc_job->els.resp = job->reply_payload.sg_list;
els_fc_job->els.handler = zfcp_fc_generic_els_handler;
els_fc_job->els.handler_data = (unsigned long) els_fc_job;
els_fc_job->job = job;
return zfcp_fsf_send_els(&els_fc_job->els);
return zfcp_fsf_send_els(adapter, d_id, els);
}
struct zfcp_ct_fc_job {
struct zfcp_send_ct ct;
struct fc_bsg_job *job;
};
static void zfcp_fc_generic_ct_handler(unsigned long data)
{
struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data;
struct fc_bsg_job *job = ct_fc_job->job;
job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ?
FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK;
job->reply->reply_payload_rcv_len = job->reply_payload.payload_len;
job->state_flags = FC_RQST_STATE_DONE;
job->job_done(job);
zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
kfree(ct_fc_job);
}
int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job)
static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job,
struct zfcp_adapter *adapter)
{
int ret;
u8 gs_type;
struct fc_rport *rport = job->rport;
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_ct_fc_job *ct_fc_job;
struct zfcp_fsf_ct_els *ct = job->dd_data;
struct zfcp_fc_wka_port *wka_port;
u32 preamble_word1;
shost = rport ? rport_to_shost(rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL);
if (!ct_fc_job)
return -ENOMEM;
preamble_word1 = job->request->rqst_data.r_ct.preamble_word1;
gs_type = (preamble_word1 & 0xff000000) >> 24;
switch (gs_type) {
case FC_FST_ALIAS:
ct_fc_job->ct.wka_port = &adapter->gs->as;
wka_port = &adapter->gs->as;
break;
case FC_FST_MGMT:
ct_fc_job->ct.wka_port = &adapter->gs->ms;
wka_port = &adapter->gs->ms;
break;
case FC_FST_TIME:
ct_fc_job->ct.wka_port = &adapter->gs->ts;
wka_port = &adapter->gs->ts;
break;
case FC_FST_DIR:
ct_fc_job->ct.wka_port = &adapter->gs->ds;
wka_port = &adapter->gs->ds;
break;
default:
kfree(ct_fc_job);
return -EINVAL; /* no such service */
}
ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port);
if (ret) {
kfree(ct_fc_job);
ret = zfcp_fc_wka_port_get(wka_port);
if (ret)
return ret;
}
ct_fc_job->ct.req = job->request_payload.sg_list;
ct_fc_job->ct.resp = job->reply_payload.sg_list;
ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler;
ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job;
ct_fc_job->ct.completion = NULL;
ct_fc_job->job = job;
ret = zfcp_fsf_send_ct(wka_port, ct, NULL);
if (ret)
zfcp_fc_wka_port_put(wka_port);
ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL);
if (ret) {
kfree(ct_fc_job);
zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
}
return ret;
}
int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job)
{
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_fsf_ct_els *ct_els = job->dd_data;
shost = job->rport ? rport_to_shost(job->rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
ct_els->req = job->request_payload.sg_list;
ct_els->resp = job->reply_payload.sg_list;
ct_els->handler = zfcp_fc_ct_els_job_handler;
ct_els->handler_data = job;
switch (job->request->msgcode) {
case FC_BSG_RPT_ELS:
case FC_BSG_HST_ELS_NOLOGIN:
return zfcp_fc_exec_els_job(job, adapter);
case FC_BSG_RPT_CT:
case FC_BSG_HST_CT:
return zfcp_fc_exec_ct_job(job, adapter);
default:
return -EINVAL;
}
}
int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
{
struct zfcp_fc_wka_ports *wka_ports;

7
drivers/s390/scsi/zfcp_fc.h
View File

@ -15,6 +15,7 @@
#include <scsi/fc/fc_ns.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_tcq.h>
#include "zfcp_fsf.h"
#define ZFCP_FC_CT_SIZE_PAGE (PAGE_SIZE - sizeof(struct fc_ct_hdr))
#define ZFCP_FC_GPN_FT_ENT_PAGE (ZFCP_FC_CT_SIZE_PAGE \
@ -55,7 +56,7 @@ struct zfcp_fc_gid_pn_resp {
* @gid_pn_resp: GID_PN response data
*/
struct zfcp_fc_gid_pn {
struct zfcp_send_ct ct;
struct zfcp_fsf_ct_els ct;
struct scatterlist sg_req;
struct scatterlist sg_resp;
struct zfcp_fc_gid_pn_req gid_pn_req;
@ -90,7 +91,7 @@ struct zfcp_fc_gpn_ft_resp {
* @sg_resp: scatter list entries for gpn_ft responses (per memory page)
*/
struct zfcp_fc_gpn_ft {
struct zfcp_send_ct ct;
struct zfcp_fsf_ct_els ct;
struct scatterlist sg_req;
struct scatterlist sg_resp[ZFCP_FC_GPN_FT_NUM_BUFS];
};
@ -104,7 +105,7 @@ struct zfcp_fc_gpn_ft {
* @adisc_resp: ELS ADISC response data
*/
struct zfcp_fc_els_adisc {
struct zfcp_send_els els;
struct zfcp_fsf_ct_els els;
struct scatterlist req;
struct scatterlist resp;
struct fc_els_adisc adisc_req;

28
drivers/s390/scsi/zfcp_fsf.c
View File

@ -961,10 +961,10 @@ out:
static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_send_ct *send_ct = req->data;
struct zfcp_fsf_ct_els *ct = req->data;
struct fsf_qtcb_header *header = &req->qtcb->header;
send_ct->status = -EINVAL;
ct->status = -EINVAL;
if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
goto skip_fsfstatus;
@ -972,7 +972,7 @@ static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
switch (header->fsf_status) {
case FSF_GOOD:
zfcp_dbf_san_ct_response(req);
send_ct->status = 0;
ct->status = 0;
break;
case FSF_SERVICE_CLASS_NOT_SUPPORTED:
zfcp_fsf_class_not_supp(req);
@ -1004,8 +1004,8 @@ static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
}
skip_fsfstatus:
if (send_ct->handler)
send_ct->handler(send_ct->handler_data);
if (ct->handler)
ct->handler(ct->handler_data);
}
static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
@ -1094,9 +1094,9 @@ static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
* @ct: pointer to struct zfcp_send_ct with data for request
* @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
*/
int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
struct zfcp_fsf_ct_els *ct, mempool_t *pool)
{
struct zfcp_fc_wka_port *wka_port = ct->wka_port;
struct zfcp_qdio *qdio = wka_port->adapter->qdio;
struct zfcp_fsf_req *req;
int ret = -EIO;
@ -1122,7 +1122,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
req->qtcb->header.port_handle = wka_port->handle;
req->data = ct;
zfcp_dbf_san_ct_request(req);
zfcp_dbf_san_ct_request(req, wka_port->d_id);
ret = zfcp_fsf_req_send(req);
if (ret)
@ -1139,7 +1139,7 @@ out:
static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
{
struct zfcp_send_els *send_els = req->data;
struct zfcp_fsf_ct_els *send_els = req->data;
struct zfcp_port *port = send_els->port;
struct fsf_qtcb_header *header = &req->qtcb->header;
@ -1159,9 +1159,6 @@ static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
case FSF_ADAPTER_STATUS_AVAILABLE:
switch (header->fsf_status_qual.word[0]){
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
if (port && (send_els->ls_code != ELS_ADISC))
zfcp_fc_test_link(port);
/*fall through */
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
case FSF_SQ_RETRY_IF_POSSIBLE:
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
@ -1193,10 +1190,11 @@ skip_fsfstatus:
* zfcp_fsf_send_els - initiate an ELS command (FC-FS)
* @els: pointer to struct zfcp_send_els with data for the command
*/
int zfcp_fsf_send_els(struct zfcp_send_els *els)
int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
struct zfcp_fsf_ct_els *els)
{
struct zfcp_fsf_req *req;
struct zfcp_qdio *qdio = els->adapter->qdio;
struct zfcp_qdio *qdio = adapter->qdio;
int ret = -EIO;
spin_lock_bh(&qdio->req_q_lock);
@ -1216,7 +1214,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
if (ret)
goto failed_send;
hton24(req->qtcb->bottom.support.d_id, els->d_id);
hton24(req->qtcb->bottom.support.d_id, d_id);
req->handler = zfcp_fsf_send_els_handler;
req->data = els;

18
drivers/s390/scsi/zfcp_fsf.h
View File

@ -437,4 +437,22 @@ struct zfcp_blk_drv_data {
u64 fabric_lat;
} __attribute__ ((packed));
/**
* struct zfcp_fsf_ct_els - zfcp data for ct or els request
* @req: scatter-gather list for request
* @resp: scatter-gather list for response
* @handler: handler function (called for response to the request)
* @handler_data: data passed to handler function
* @port: Optional pointer to port for zfcp internal ELS (only test link ADISC)
* @status: used to pass error status to calling function
*/
struct zfcp_fsf_ct_els {
struct scatterlist *req;
struct scatterlist *resp;
void (*handler)(void *);
void *handler_data;
struct zfcp_port *port;
int status;
};
#endif /* FSF_H */

18
drivers/s390/scsi/zfcp_scsi.c
View File

@ -14,6 +14,7 @@
#include <asm/atomic.h>
#include "zfcp_ext.h"
#include "zfcp_dbf.h"
#include "zfcp_fc.h"
static unsigned int default_depth = 32;
module_param_named(queue_depth, default_depth, uint, 0600);
@ -628,20 +629,6 @@ void zfcp_scsi_scan(struct work_struct *work)
put_device(&unit->sysfs_device);
}
static int zfcp_execute_fc_job(struct fc_bsg_job *job)
{
switch (job->request->msgcode) {
case FC_BSG_RPT_ELS:
case FC_BSG_HST_ELS_NOLOGIN:
return zfcp_fc_execute_els_fc_job(job);
case FC_BSG_RPT_CT:
case FC_BSG_HST_CT:
return zfcp_fc_execute_ct_fc_job(job);
default:
return -EINVAL;
}
}
struct fc_function_template zfcp_transport_functions = {
.show_starget_port_id = 1,
.show_starget_port_name = 1,
@ -662,13 +649,14 @@ struct fc_function_template zfcp_transport_functions = {
.get_host_port_state = zfcp_get_host_port_state,
.terminate_rport_io = zfcp_scsi_terminate_rport_io,
.show_host_port_state = 1,
.bsg_request = zfcp_execute_fc_job,
.bsg_request = zfcp_fc_exec_bsg_job,
/* no functions registered for following dynamic attributes but
directly set by LLDD */
.show_host_port_type = 1,
.show_host_speed = 1,
.show_host_port_id = 1,
.disable_target_scan = 1,
.dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
};
struct zfcp_data zfcp_data = {