[SCSI] zfcp: Use common code definitions for FC ELS structs (9d05ce2c) · Commits · 方亚芬 / raspberrypi_linux

drivers/s390/scsi/zfcp_def.h

+0 −45

Original line number	Diff line number	Diff line
		@@ -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

+3 −1

Original line number	Diff line number	Diff line
		@@ -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

+66 −65

Original line number	Diff line number	Diff line
		@@ -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

+17 −0

Original line number	Diff line number	Diff line
		@@ -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

+20 −25

Original line number	Diff line number	Diff line
		@@ -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;