[SCSI] zfcp: Use common code definitions for FC ELS structs

Use common code definitions for FC plogi, logo, rscn and adisc structs
instead of inventing private ones. Move the private struct for issuing
ELS ADISC inside zfcp to zfcp_fc header file.
Reviewed-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/s390/scsi/zfcp_def.h

@@ -75,51 +75,6 @@
 
 #define ZFCP_DID_MASK           0x00FFFFFF
 
-/* see fc-fs */
-#define LS_RSCN  0x61
-#define LS_LOGO  0x05
-#define LS_PLOGI 0x03
-
-struct fcp_rscn_head {
-        u8  command;
-        u8  page_length; /* always 0x04 */
-        u16 payload_len;
-} __attribute__((packed));
-
-struct fcp_rscn_element {
-        u8  reserved:2;
-        u8  event_qual:4;
-        u8  addr_format:2;
-        u32 nport_did:24;
-} __attribute__((packed));
-
-/* see fc-ph */
-struct fcp_logo {
-        u32 command;
-        u32 nport_did;
-	u64 nport_wwpn;
-} __attribute__((packed));
-
-/*
- * FC-FS stuff
- */
-#define R_A_TOV				10 /* seconds */
-
-#define ZFCP_LS_RLS			0x0f
-#define ZFCP_LS_ADISC			0x52
-#define ZFCP_LS_RPS			0x56
-#define ZFCP_LS_RSCN			0x61
-#define ZFCP_LS_RNID			0x78
-
-struct zfcp_ls_adisc {
-	u8		code;
-	u8		field[3];
-	u32		hard_nport_id;
-	u64		wwpn;
-	u64		wwnn;
-	u32		nport_id;
-} __attribute__ ((packed));
-
 /*
  * FC-GS-2 stuff
  */

drivers/s390/scsi/zfcp_ext.h

@@ -9,6 +9,8 @@
 #ifndef ZFCP_EXT_H
 #define ZFCP_EXT_H
 
+#include <linux/types.h>
+#include <scsi/fc/fc_els.h>
 #include "zfcp_def.h"
 
 /* zfcp_aux.c */
@@ -98,7 +100,7 @@ extern void zfcp_fc_scan_ports(struct work_struct *);
 extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
 extern void zfcp_fc_port_did_lookup(struct work_struct *);
 extern void zfcp_fc_trigger_did_lookup(struct zfcp_port *);
-extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
+extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fc_els_flogi *);
 extern void zfcp_fc_test_link(struct zfcp_port *);
 extern void zfcp_fc_link_test_work(struct work_struct *);
 extern void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *);

drivers/s390/scsi/zfcp_fc.c

@@ -9,20 +9,17 @@
 #define KMSG_COMPONENT "zfcp"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/types.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/libfc.h>
 #include "zfcp_ext.h"
+#include "zfcp_fc.h"
 
-enum rscn_address_format {
-	RSCN_PORT_ADDRESS	= 0x0,
-	RSCN_AREA_ADDRESS	= 0x1,
-	RSCN_DOMAIN_ADDRESS	= 0x2,
-	RSCN_FABRIC_ADDRESS	= 0x3,
-};
-
-static u32 rscn_range_mask[] = {
-	[RSCN_PORT_ADDRESS]		= 0xFFFFFF,
-	[RSCN_AREA_ADDRESS]		= 0xFFFF00,
-	[RSCN_DOMAIN_ADDRESS]		= 0xFF0000,
-	[RSCN_FABRIC_ADDRESS]		= 0x000000,
+static u32 zfcp_fc_rscn_range_mask[] = {
+	[ELS_ADDR_FMT_PORT]		= 0xFFFFFF,
+	[ELS_ADDR_FMT_AREA]		= 0xFFFF00,
+	[ELS_ADDR_FMT_DOM]		= 0xFF0000,
+	[ELS_ADDR_FMT_FAB]		= 0x000000,
 };
 
 struct gpn_ft_resp_acc {
@@ -144,7 +141,7 @@ void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs)
 }
 
 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
-				   struct fcp_rscn_element *elem)
+				   struct fc_els_rscn_page *page)
 {
 	unsigned long flags;
 	struct zfcp_adapter *adapter = fsf_req->adapter;
@@ -152,7 +149,7 @@ static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 
 	read_lock_irqsave(&adapter->port_list_lock, flags);
 	list_for_each_entry(port, &adapter->port_list, list) {
-		if ((port->d_id & range) == (elem->nport_did & range))
+		if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
 			zfcp_fc_test_link(port);
 		if (!port->d_id)
 			zfcp_erp_port_reopen(port,
@@ -165,24 +162,24 @@ static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
 {
 	struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
-	struct fcp_rscn_head *fcp_rscn_head;
-	struct fcp_rscn_element *fcp_rscn_element;
+	struct fc_els_rscn *head;
+	struct fc_els_rscn_page *page;
 	u16 i;
 	u16 no_entries;
-	u32 range_mask;
+	unsigned int afmt;
 
-	fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data;
-	fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head;
+	head = (struct fc_els_rscn *) status_buffer->payload.data;
+	page = (struct fc_els_rscn_page *) head;
 
 	/* see FC-FS */
-	no_entries = fcp_rscn_head->payload_len /
-			sizeof(struct fcp_rscn_element);
+	no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page);
 
 	for (i = 1; i < no_entries; i++) {
 		/* skip head and start with 1st element */
-		fcp_rscn_element++;
-		range_mask = rscn_range_mask[fcp_rscn_element->addr_format];
-		_zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element);
+		page++;
+		afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
+		_zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
+				       page);
 	}
 	queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work);
 }
@@ -204,22 +201,22 @@ static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
 
 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
 {
-	struct fsf_status_read_buffer *status_buffer =
-		(struct fsf_status_read_buffer *)req->data;
-	struct fsf_plogi *els_plogi =
-		(struct fsf_plogi *) status_buffer->payload.data;
+	struct fsf_status_read_buffer *status_buffer;
+	struct fc_els_flogi *plogi;
 
-	zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
+	status_buffer = (struct fsf_status_read_buffer *) req->data;
+	plogi = (struct fc_els_flogi *) status_buffer->payload.data;
+	zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn);
 }
 
 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
 {
 	struct fsf_status_read_buffer *status_buffer =
 		(struct fsf_status_read_buffer *)req->data;
-	struct fcp_logo *els_logo =
-		(struct fcp_logo *) status_buffer->payload.data;
+	struct fc_els_logo *logo =
+		(struct fc_els_logo *) status_buffer->payload.data;
 
-	zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
+	zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn);
 }
 
 /**
@@ -233,11 +230,11 @@ void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
 	unsigned int els_type = status_buffer->payload.data[0];
 
 	zfcp_dbf_san_incoming_els(fsf_req);
-	if (els_type == LS_PLOGI)
+	if (els_type == ELS_PLOGI)
 		zfcp_fc_incoming_plogi(fsf_req);
-	else if (els_type == LS_LOGO)
+	else if (els_type == ELS_LOGO)
 		zfcp_fc_incoming_logo(fsf_req);
-	else if (els_type == LS_RSCN)
+	else if (els_type == ELS_RSCN)
 		zfcp_fc_incoming_rscn(fsf_req);
 }
 
@@ -379,33 +376,36 @@ void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
  *
  * Evaluate PLOGI playload and copy important fields into zfcp_port structure
  */
-void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
-{
-	port->maxframe_size = plogi->serv_param.common_serv_param[7] |
-		((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
-	if (plogi->serv_param.class1_serv_param[0] & 0x80)
+void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
+{
+	if (plogi->fl_wwpn != port->wwpn) {
+		port->d_id = 0;
+		dev_warn(&port->adapter->ccw_device->dev,
+			 "A port opened with WWPN 0x%016Lx returned data that "
+			 "identifies it as WWPN 0x%016Lx\n",
+			 (unsigned long long) port->wwpn,
+			 (unsigned long long) plogi->fl_wwpn);
+		return;
+	}
+
+	port->wwnn = plogi->fl_wwnn;
+	port->maxframe_size = plogi->fl_csp.sp_bb_data;
+
+	if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID)
 		port->supported_classes |= FC_COS_CLASS1;
-	if (plogi->serv_param.class2_serv_param[0] & 0x80)
+	if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID)
 		port->supported_classes |= FC_COS_CLASS2;
-	if (plogi->serv_param.class3_serv_param[0] & 0x80)
+	if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID)
 		port->supported_classes |= FC_COS_CLASS3;
-	if (plogi->serv_param.class4_serv_param[0] & 0x80)
+	if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID)
 		port->supported_classes |= FC_COS_CLASS4;
 }
 
-struct zfcp_els_adisc {
-	struct zfcp_send_els els;
-	struct scatterlist req;
-	struct scatterlist resp;
-	struct zfcp_ls_adisc ls_adisc;
-	struct zfcp_ls_adisc ls_adisc_acc;
-};
-
 static void zfcp_fc_adisc_handler(unsigned long data)
 {
-	struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data;
+	struct zfcp_fc_els_adisc *adisc = (struct zfcp_fc_els_adisc *) data;
 	struct zfcp_port *port = adisc->els.port;
-	struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc;
+	struct fc_els_adisc *adisc_resp = &adisc->adisc_resp;
 
 	if (adisc->els.status) {
 		/* request rejected or timed out */
@@ -415,9 +415,9 @@ static void zfcp_fc_adisc_handler(unsigned long data)
 	}
 
 	if (!port->wwnn)
-		port->wwnn = ls_adisc->wwnn;
+		port->wwnn = adisc_resp->adisc_wwnn;
 
-	if ((port->wwpn != ls_adisc->wwpn) ||
+	if ((port->wwpn != adisc_resp->adisc_wwpn) ||
 	    !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
 		zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
 				     "fcadh_2", NULL);
@@ -434,32 +434,33 @@ static void zfcp_fc_adisc_handler(unsigned long data)
 
 static int zfcp_fc_adisc(struct zfcp_port *port)
 {
-	struct zfcp_els_adisc *adisc;
+	struct zfcp_fc_els_adisc *adisc;
 	struct zfcp_adapter *adapter = port->adapter;
 
-	adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC);
+	adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC);
 	if (!adisc)
 		return -ENOMEM;
 
 	adisc->els.req = &adisc->req;
 	adisc->els.resp = &adisc->resp;
-	sg_init_one(adisc->els.req, &adisc->ls_adisc,
-		    sizeof(struct zfcp_ls_adisc));
-	sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc,
-		    sizeof(struct zfcp_ls_adisc));
+	sg_init_one(adisc->els.req, &adisc->adisc_req,
+		    sizeof(struct fc_els_adisc));
+	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->ls_adisc.code = ZFCP_LS_ADISC;
+	adisc->els.ls_code = adisc->adisc_req.adisc_cmd = ELS_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->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host);
-	adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host);
-	adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host);
+	adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host);
+	adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host);
+	hton24(adisc->adisc_req.adisc_port_id,
+	       fc_host_port_id(adapter->scsi_host));
 
 	return zfcp_fsf_send_els(&adisc->els);
 }

drivers/s390/scsi/zfcp_fc.h

@@ -10,10 +10,27 @@
 #ifndef ZFCP_FC_H
 #define ZFCP_FC_H
 
+#include <scsi/fc/fc_els.h>
 #include <scsi/fc/fc_fcp.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_tcq.h>
 
+/**
+ * struct zfcp_fc_els_adisc - everything required in zfcp for issuing ELS ADISC
+ * @els: data required for issuing els fsf command
+ * @req: scatterlist entry for ELS ADISC request
+ * @resp: scatterlist entry for ELS ADISC response
+ * @adisc_req: ELS ADISC request data
+ * @adisc_resp: ELS ADISC response data
+ */
+struct zfcp_fc_els_adisc {
+	struct zfcp_send_els els;
+	struct scatterlist req;
+	struct scatterlist resp;
+	struct fc_els_adisc adisc_req;
+	struct fc_els_adisc adisc_resp;
+};
+
 /**
  * zfcp_fc_scsi_to_fcp - setup FCP command with data from scsi_cmnd
  * @fcp: fcp_cmnd to setup

drivers/s390/scsi/zfcp_fsf.c

@@ -10,6 +10,7 @@
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/blktrace_api.h>
+#include <scsi/fc/fc_els.h>
 #include "zfcp_ext.h"
 #include "zfcp_fc.h"
 #include "zfcp_dbf.h"
@@ -477,17 +478,22 @@ void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 
 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 {
-	struct fsf_qtcb_bottom_config *bottom;
+	struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
 	struct zfcp_adapter *adapter = req->adapter;
 	struct Scsi_Host *shost = adapter->scsi_host;
+	struct fc_els_flogi *nsp, *plogi;
 
-	bottom = &req->qtcb->bottom.config;
+	/* adjust pointers for missing command code */
+	nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
+					- sizeof(u32));
+	plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
+					- sizeof(u32));
 
 	if (req->data)
 		memcpy(req->data, bottom, sizeof(*bottom));
 
-	fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
-	fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
+	fc_host_port_name(shost) = nsp->fl_wwpn;
+	fc_host_node_name(shost) = nsp->fl_wwnn;
 	fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
 	fc_host_speed(shost) = bottom->fc_link_speed;
 	fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
@@ -501,8 +507,8 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 	switch (bottom->fc_topology) {
 	case FSF_TOPO_P2P:
 		adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
-		adapter->peer_wwpn = bottom->plogi_payload.wwpn;
-		adapter->peer_wwnn = bottom->plogi_payload.wwnn;
+		adapter->peer_wwpn = plogi->fl_wwpn;
+		adapter->peer_wwnn = plogi->fl_wwnn;
 		fc_host_port_type(shost) = FC_PORTTYPE_PTP;
 		break;
 	case FSF_TOPO_FABRIC:
@@ -1068,15 +1074,17 @@ static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
 				 int max_sbals)
 {
 	int ret;
+	unsigned int fcp_chan_timeout;
 
 	ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
 	if (ret)
 		return ret;
 
 	/* common settings for ct/gs and els requests */
+	fcp_chan_timeout = 2 * FC_DEF_R_A_TOV / 1000;
 	req->qtcb->bottom.support.service_class = FSF_CLASS_3;
-	req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
-	zfcp_fsf_start_timer(req, (2 * R_A_TOV + 10) * HZ);
+	req->qtcb->bottom.support.timeout = fcp_chan_timeout;
+	zfcp_fsf_start_timer(req, (fcp_chan_timeout + 10) * HZ);
 
 	return 0;
 }
@@ -1151,7 +1159,7 @@ 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 != ZFCP_LS_ADISC))
+			if (port && (send_els->ls_code != ELS_ADISC))
 				zfcp_fc_test_link(port);
 			/*fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
@@ -1419,7 +1427,7 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
 {
 	struct zfcp_port *port = req->data;
 	struct fsf_qtcb_header *header = &req->qtcb->header;
-	struct fsf_plogi *plogi;
+	struct fc_els_flogi *plogi;
 
 	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto out;
@@ -1469,23 +1477,10 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
 		 * another GID_PN straight after a port has been opened.
 		 * Alternately, an ADISC/PDISC ELS should suffice, as well.
 		 */
-		plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
+		plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
 		if (req->qtcb->bottom.support.els1_length >=
-		    FSF_PLOGI_MIN_LEN) {
-			if (plogi->serv_param.wwpn != port->wwpn) {
-				port->d_id = 0;
-				dev_warn(&port->adapter->ccw_device->dev,
-					 "A port opened with WWPN 0x%016Lx "
-					 "returned data that identifies it as "
-					 "WWPN 0x%016Lx\n",
-					 (unsigned long long) port->wwpn,
-					 (unsigned long long)
-					  plogi->serv_param.wwpn);
-			} else {
-				port->wwnn = plogi->serv_param.wwnn;
+		    FSF_PLOGI_MIN_LEN)
 				zfcp_fc_plogi_evaluate(port, plogi);
-			}
-		}
 		break;
 	case FSF_UNKNOWN_OP_SUBTYPE:
 		req->status |= ZFCP_STATUS_FSFREQ_ERROR;

drivers/s390/scsi/zfcp_fsf.h

@@ -309,22 +309,7 @@ struct fsf_qtcb_header {
 	u8  res4[16];
 } __attribute__ ((packed));
 
-struct fsf_nport_serv_param {
-	u8  common_serv_param[16];
-	u64 wwpn;
-	u64 wwnn;
-	u8  class1_serv_param[16];
-	u8  class2_serv_param[16];
-	u8  class3_serv_param[16];
-	u8  class4_serv_param[16];
-	u8  vendor_version_level[16];
-} __attribute__ ((packed));
-
 #define FSF_PLOGI_MIN_LEN	112
-struct fsf_plogi {
-	u32    code;
-	struct fsf_nport_serv_param serv_param;
-} __attribute__ ((packed));
 
 #define FSF_FCP_CMND_SIZE	288
 #define FSF_FCP_RSP_SIZE	128
@@ -377,13 +362,12 @@ struct fsf_qtcb_bottom_config {
 	u16 timer_interval;
 	u8 res2[8];
 	u32 s_id;
-	struct fsf_nport_serv_param nport_serv_param;
-	u8 reserved_nport_serv_param[16];
+	u8 nport_serv_param[128];
 	u8 res3[8];
 	u32 adapter_ports;
 	u32 hardware_version;
 	u8 serial_number[32];
-	struct fsf_nport_serv_param plogi_payload;
+	u8 plogi_payload[112];
 	struct fsf_statistics_info stat_info;
 	u8 res4[112];
 } __attribute__ ((packed));