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Diffstat (limited to 'include/scsi/scsi_transport_fc.h')
| -rw-r--r-- | include/scsi/scsi_transport_fc.h | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h new file mode 100644 index 000000000..784bc2c09 --- /dev/null +++ b/include/scsi/scsi_transport_fc.h @@ -0,0 +1,861 @@ +/* + * FiberChannel transport specific attributes exported to sysfs. + * + * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ======== + * + * Copyright (C) 2004-2007 James Smart, Emulex Corporation + * Rewrite for host, target, device, and remote port attributes, + * statistics, and service functions... + * + */ +#ifndef SCSI_TRANSPORT_FC_H +#define SCSI_TRANSPORT_FC_H + +#include <linux/sched.h> +#include <scsi/scsi.h> +#include <scsi/scsi_netlink.h> + +struct scsi_transport_template; + +/* + * FC Port definitions - Following FC HBAAPI guidelines + * + * Note: Not all binary values for the different fields match HBAAPI. + * Instead, we use densely packed ordinal values or enums. + * We get away with this as we never present the actual binary values + * externally. For sysfs, we always present the string that describes + * the value. Thus, an admin doesn't need a magic HBAAPI decoder ring + * to understand the values. The HBAAPI user-space library is free to + * convert the strings into the HBAAPI-specified binary values. + * + * Note: Not all HBAAPI-defined values are contained in the definitions + * below. Those not appropriate to an fc_host (e.g. FCP initiator) have + * been removed. + */ + +/* + * fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c + * (for the ascii descriptions). + */ +enum fc_port_type { + FC_PORTTYPE_UNKNOWN, + FC_PORTTYPE_OTHER, + FC_PORTTYPE_NOTPRESENT, + FC_PORTTYPE_NPORT, /* Attached to FPort */ + FC_PORTTYPE_NLPORT, /* (Public) Loop w/ FLPort */ + FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */ + FC_PORTTYPE_PTP, /* Point to Point w/ another NPort */ + FC_PORTTYPE_NPIV, /* VPORT based on NPIV */ +}; + + +/* + * fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c + * (for the ascii descriptions). + */ +enum fc_port_state { + FC_PORTSTATE_UNKNOWN, + FC_PORTSTATE_NOTPRESENT, + FC_PORTSTATE_ONLINE, + FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */ + FC_PORTSTATE_BLOCKED, + FC_PORTSTATE_BYPASSED, + FC_PORTSTATE_DIAGNOSTICS, + FC_PORTSTATE_LINKDOWN, + FC_PORTSTATE_ERROR, + FC_PORTSTATE_LOOPBACK, + FC_PORTSTATE_DELETED, +}; + + +/* + * fc_vport_state: If you alter this, you also need to alter + * scsi_transport_fc.c (for the ascii descriptions). + */ +enum fc_vport_state { + FC_VPORT_UNKNOWN, + FC_VPORT_ACTIVE, + FC_VPORT_DISABLED, + FC_VPORT_LINKDOWN, + FC_VPORT_INITIALIZING, + FC_VPORT_NO_FABRIC_SUPP, + FC_VPORT_NO_FABRIC_RSCS, + FC_VPORT_FABRIC_LOGOUT, + FC_VPORT_FABRIC_REJ_WWN, + FC_VPORT_FAILED, +}; + + + +/* + * FC Classes of Service + * Note: values are not enumerated, as they can be "or'd" together + * for reporting (e.g. report supported_classes). If you alter this list, + * you also need to alter scsi_transport_fc.c (for the ascii descriptions). + */ +#define FC_COS_UNSPECIFIED 0 +#define FC_COS_CLASS1 2 +#define FC_COS_CLASS2 4 +#define FC_COS_CLASS3 8 +#define FC_COS_CLASS4 0x10 +#define FC_COS_CLASS6 0x40 + +/* + * FC Port Speeds + * Note: values are not enumerated, as they can be "or'd" together + * for reporting (e.g. report supported_speeds). If you alter this list, + * you also need to alter scsi_transport_fc.c (for the ascii descriptions). + */ +#define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver + incapable of reporting */ +#define FC_PORTSPEED_1GBIT 1 +#define FC_PORTSPEED_2GBIT 2 +#define FC_PORTSPEED_10GBIT 4 +#define FC_PORTSPEED_4GBIT 8 +#define FC_PORTSPEED_8GBIT 0x10 +#define FC_PORTSPEED_16GBIT 0x20 +#define FC_PORTSPEED_32GBIT 0x40 +#define FC_PORTSPEED_20GBIT 0x80 +#define FC_PORTSPEED_40GBIT 0x100 +#define FC_PORTSPEED_50GBIT 0x200 +#define FC_PORTSPEED_100GBIT 0x400 +#define FC_PORTSPEED_25GBIT 0x800 +#define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */ + +/* + * fc_tgtid_binding_type: If you alter this, you also need to alter + * scsi_transport_fc.c (for the ascii descriptions). + */ +enum fc_tgtid_binding_type { + FC_TGTID_BIND_NONE, + FC_TGTID_BIND_BY_WWPN, + FC_TGTID_BIND_BY_WWNN, + FC_TGTID_BIND_BY_ID, +}; + +/* + * FC Port Roles + * Note: values are not enumerated, as they can be "or'd" together + * for reporting (e.g. report roles). If you alter this list, + * you also need to alter scsi_transport_fc.c (for the ascii descriptions). + */ +#define FC_PORT_ROLE_UNKNOWN 0x00 +#define FC_PORT_ROLE_FCP_TARGET 0x01 +#define FC_PORT_ROLE_FCP_INITIATOR 0x02 +#define FC_PORT_ROLE_IP_PORT 0x04 + +/* The following are for compatibility */ +#define FC_RPORT_ROLE_UNKNOWN FC_PORT_ROLE_UNKNOWN +#define FC_RPORT_ROLE_FCP_TARGET FC_PORT_ROLE_FCP_TARGET +#define FC_RPORT_ROLE_FCP_INITIATOR FC_PORT_ROLE_FCP_INITIATOR +#define FC_RPORT_ROLE_IP_PORT FC_PORT_ROLE_IP_PORT + + +/* Macro for use in defining Virtual Port attributes */ +#define FC_VPORT_ATTR(_name,_mode,_show,_store) \ +struct device_attribute dev_attr_vport_##_name = \ + __ATTR(_name,_mode,_show,_store) + +/* + * fc_vport_identifiers: This set of data contains all elements + * to uniquely identify and instantiate a FC virtual port. + * + * Notes: + * symbolic_name: The driver is to append the symbolic_name string data + * to the symbolic_node_name data that it generates by default. + * the resulting combination should then be registered with the switch. + * It is expected that things like Xen may stuff a VM title into + * this field. + */ +#define FC_VPORT_SYMBOLIC_NAMELEN 64 +struct fc_vport_identifiers { + u64 node_name; + u64 port_name; + u32 roles; + bool disable; + enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */ + char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN]; +}; + +/* + * FC Virtual Port Attributes + * + * This structure exists for each FC port is a virtual FC port. Virtual + * ports share the physical link with the Physical port. Each virtual + * ports has a unique presence on the SAN, and may be instantiated via + * NPIV, Virtual Fabrics, or via additional ALPAs. As the vport is a + * unique presence, each vport has it's own view of the fabric, + * authentication privilege, and priorities. + * + * A virtual port may support 1 or more FC4 roles. Typically it is a + * FCP Initiator. It could be a FCP Target, or exist sole for an IP over FC + * roles. FC port attributes for the vport will be reported on any + * fc_host class object allocated for an FCP Initiator. + * + * -- + * + * Fixed attributes are not expected to change. The driver is + * expected to set these values after receiving the fc_vport structure + * via the vport_create() call from the transport. + * The transport fully manages all get functions w/o driver interaction. + * + * Dynamic attributes are expected to change. The driver participates + * in all get/set operations via functions provided by the driver. + * + * Private attributes are transport-managed values. They are fully + * managed by the transport w/o driver interaction. + */ + +struct fc_vport { + /* Fixed Attributes */ + + /* Dynamic Attributes */ + + /* Private (Transport-managed) Attributes */ + enum fc_vport_state vport_state; + enum fc_vport_state vport_last_state; + u64 node_name; + u64 port_name; + u32 roles; + u32 vport_id; /* Admin Identifier for the vport */ + enum fc_port_type vport_type; + char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN]; + + /* exported data */ + void *dd_data; /* Used for driver-specific storage */ + + /* internal data */ + struct Scsi_Host *shost; /* Physical Port Parent */ + unsigned int channel; + u32 number; + u8 flags; + struct list_head peers; + struct device dev; + struct work_struct vport_delete_work; +} __attribute__((aligned(sizeof(unsigned long)))); + +/* bit field values for struct fc_vport "flags" field: */ +#define FC_VPORT_CREATING 0x01 +#define FC_VPORT_DELETING 0x02 +#define FC_VPORT_DELETED 0x04 +#define FC_VPORT_DEL 0x06 /* Any DELETE state */ + +#define dev_to_vport(d) \ + container_of(d, struct fc_vport, dev) +#define transport_class_to_vport(dev) \ + dev_to_vport(dev->parent) +#define vport_to_shost(v) \ + (v->shost) +#define vport_to_shost_channel(v) \ + (v->channel) +#define vport_to_parent(v) \ + (v->dev.parent) + + +/* Error return codes for vport_create() callback */ +#define VPCERR_UNSUPPORTED -ENOSYS /* no driver/adapter + support */ +#define VPCERR_BAD_WWN -ENOTUNIQ /* driver validation + of WWNs failed */ +#define VPCERR_NO_FABRIC_SUPP -EOPNOTSUPP /* Fabric connection + is loop or the + Fabric Port does + not support NPIV */ + +/* + * fc_rport_identifiers: This set of data contains all elements + * to uniquely identify a remote FC port. The driver uses this data + * to report the existence of a remote FC port in the topology. Internally, + * the transport uses this data for attributes and to manage consistent + * target id bindings. + */ +struct fc_rport_identifiers { + u64 node_name; + u64 port_name; + u32 port_id; + u32 roles; +}; + + +/* Macro for use in defining Remote Port attributes */ +#define FC_RPORT_ATTR(_name,_mode,_show,_store) \ +struct device_attribute dev_attr_rport_##_name = \ + __ATTR(_name,_mode,_show,_store) + + +/* + * FC Remote Port Attributes + * + * This structure exists for each remote FC port that a LLDD notifies + * the subsystem of. A remote FC port may or may not be a SCSI Target, + * also be a SCSI initiator, IP endpoint, etc. As such, the remote + * port is considered a separate entity, independent of "role" (such + * as scsi target). + * + * -- + * + * Attributes are based on HBAAPI V2.0 definitions. Only those + * attributes that are determinable by the local port (aka Host) + * are contained. + * + * Fixed attributes are not expected to change. The driver is + * expected to set these values after successfully calling + * fc_remote_port_add(). The transport fully manages all get functions + * w/o driver interaction. + * + * Dynamic attributes are expected to change. The driver participates + * in all get/set operations via functions provided by the driver. + * + * Private attributes are transport-managed values. They are fully + * managed by the transport w/o driver interaction. + */ + +struct fc_rport { /* aka fc_starget_attrs */ + /* Fixed Attributes */ + u32 maxframe_size; + u32 supported_classes; + + /* Dynamic Attributes */ + u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */ + + /* Private (Transport-managed) Attributes */ + u64 node_name; + u64 port_name; + u32 port_id; + u32 roles; + enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */ + u32 scsi_target_id; + u32 fast_io_fail_tmo; + + /* exported data */ + void *dd_data; /* Used for driver-specific storage */ + + /* internal data */ + unsigned int channel; + u32 number; + u8 flags; + struct list_head peers; + struct device dev; + struct delayed_work dev_loss_work; + struct work_struct scan_work; + struct delayed_work fail_io_work; + struct work_struct stgt_delete_work; + struct work_struct rport_delete_work; + struct request_queue *rqst_q; /* bsg support */ +} __attribute__((aligned(sizeof(unsigned long)))); + +/* bit field values for struct fc_rport "flags" field: */ +#define FC_RPORT_DEVLOSS_PENDING 0x01 +#define FC_RPORT_SCAN_PENDING 0x02 +#define FC_RPORT_FAST_FAIL_TIMEDOUT 0x04 +#define FC_RPORT_DEVLOSS_CALLBK_DONE 0x08 + +#define dev_to_rport(d) \ + container_of(d, struct fc_rport, dev) +#define transport_class_to_rport(dev) \ + dev_to_rport(dev->parent) +#define rport_to_shost(r) \ + dev_to_shost(r->dev.parent) + +/* + * FC SCSI Target Attributes + * + * The SCSI Target is considered an extension of a remote port (as + * a remote port can be more than a SCSI Target). Within the scsi + * subsystem, we leave the Target as a separate entity. Doing so + * provides backward compatibility with prior FC transport api's, + * and lets remote ports be handled entirely within the FC transport + * and independently from the scsi subsystem. The drawback is that + * some data will be duplicated. + */ + +struct fc_starget_attrs { /* aka fc_target_attrs */ + /* Dynamic Attributes */ + u64 node_name; + u64 port_name; + u32 port_id; +}; + +#define fc_starget_node_name(x) \ + (((struct fc_starget_attrs *)&(x)->starget_data)->node_name) +#define fc_starget_port_name(x) \ + (((struct fc_starget_attrs *)&(x)->starget_data)->port_name) +#define fc_starget_port_id(x) \ + (((struct fc_starget_attrs *)&(x)->starget_data)->port_id) + +#define starget_to_rport(s) \ + scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL + + +/* + * FC Local Port (Host) Statistics + */ + +/* FC Statistics - Following FC HBAAPI v2.0 guidelines */ +struct fc_host_statistics { + /* port statistics */ + u64 seconds_since_last_reset; + u64 tx_frames; + u64 tx_words; + u64 rx_frames; + u64 rx_words; + u64 lip_count; + u64 nos_count; + u64 error_frames; + u64 dumped_frames; + u64 link_failure_count; + u64 loss_of_sync_count; + u64 loss_of_signal_count; + u64 prim_seq_protocol_err_count; + u64 invalid_tx_word_count; + u64 invalid_crc_count; + + /* fc4 statistics (only FCP supported currently) */ + u64 fcp_input_requests; + u64 fcp_output_requests; + u64 fcp_control_requests; + u64 fcp_input_megabytes; + u64 fcp_output_megabytes; + u64 fcp_packet_alloc_failures; /* fcp packet allocation failures */ + u64 fcp_packet_aborts; /* fcp packet aborted */ + u64 fcp_frame_alloc_failures; /* fcp frame allocation failures */ + + /* fc exches statistics */ + u64 fc_no_free_exch; /* no free exch memory */ + u64 fc_no_free_exch_xid; /* no free exch id */ + u64 fc_xid_not_found; /* exch not found for a response */ + u64 fc_xid_busy; /* exch exist for new a request */ + u64 fc_seq_not_found; /* seq is not found for exchange */ + u64 fc_non_bls_resp; /* a non BLS response frame with + a sequence responder in new exch */ +}; + + +/* + * FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines + */ + +/* + * fc_host_event_code: If you alter this, you also need to alter + * scsi_transport_fc.c (for the ascii descriptions). + */ +enum fc_host_event_code { + FCH_EVT_LIP = 0x1, + FCH_EVT_LINKUP = 0x2, + FCH_EVT_LINKDOWN = 0x3, + FCH_EVT_LIPRESET = 0x4, + FCH_EVT_RSCN = 0x5, + FCH_EVT_ADAPTER_CHANGE = 0x103, + FCH_EVT_PORT_UNKNOWN = 0x200, + FCH_EVT_PORT_OFFLINE = 0x201, + FCH_EVT_PORT_ONLINE = 0x202, + FCH_EVT_PORT_FABRIC = 0x204, + FCH_EVT_LINK_UNKNOWN = 0x500, + FCH_EVT_VENDOR_UNIQUE = 0xffff, +}; + + +/* + * FC Local Port (Host) Attributes + * + * Attributes are based on HBAAPI V2.0 definitions. + * Note: OSDeviceName is determined by user-space library + * + * Fixed attributes are not expected to change. The driver is + * expected to set these values after successfully calling scsi_add_host(). + * The transport fully manages all get functions w/o driver interaction. + * + * Dynamic attributes are expected to change. The driver participates + * in all get/set operations via functions provided by the driver. + * + * Private attributes are transport-managed values. They are fully + * managed by the transport w/o driver interaction. + */ + +#define FC_FC4_LIST_SIZE 32 +#define FC_SYMBOLIC_NAME_SIZE 256 +#define FC_VERSION_STRING_SIZE 64 +#define FC_SERIAL_NUMBER_SIZE 80 + +struct fc_host_attrs { + /* Fixed Attributes */ + u64 node_name; + u64 port_name; + u64 permanent_port_name; + u32 supported_classes; + u8 supported_fc4s[FC_FC4_LIST_SIZE]; + u32 supported_speeds; + u32 maxframe_size; + u16 max_npiv_vports; + char serial_number[FC_SERIAL_NUMBER_SIZE]; + char manufacturer[FC_SERIAL_NUMBER_SIZE]; + char model[FC_SYMBOLIC_NAME_SIZE]; + char model_description[FC_SYMBOLIC_NAME_SIZE]; + char hardware_version[FC_VERSION_STRING_SIZE]; + char driver_version[FC_VERSION_STRING_SIZE]; + char firmware_version[FC_VERSION_STRING_SIZE]; + char optionrom_version[FC_VERSION_STRING_SIZE]; + + /* Dynamic Attributes */ + u32 port_id; + enum fc_port_type port_type; + enum fc_port_state port_state; + u8 active_fc4s[FC_FC4_LIST_SIZE]; + u32 speed; + u64 fabric_name; + char symbolic_name[FC_SYMBOLIC_NAME_SIZE]; + char system_hostname[FC_SYMBOLIC_NAME_SIZE]; + u32 dev_loss_tmo; + + /* Private (Transport-managed) Attributes */ + enum fc_tgtid_binding_type tgtid_bind_type; + + /* internal data */ + struct list_head rports; + struct list_head rport_bindings; + struct list_head vports; + u32 next_rport_number; + u32 next_target_id; + u32 next_vport_number; + u16 npiv_vports_inuse; + + /* work queues for rport state manipulation */ + char work_q_name[20]; + struct workqueue_struct *work_q; + char devloss_work_q_name[20]; + struct workqueue_struct *devloss_work_q; + + /* bsg support */ + struct request_queue *rqst_q; +}; + +#define shost_to_fc_host(x) \ + ((struct fc_host_attrs *)(x)->shost_data) + +#define fc_host_node_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->node_name) +#define fc_host_port_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->port_name) +#define fc_host_permanent_port_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name) +#define fc_host_supported_classes(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->supported_classes) +#define fc_host_supported_fc4s(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s) +#define fc_host_supported_speeds(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->supported_speeds) +#define fc_host_maxframe_size(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->maxframe_size) +#define fc_host_max_npiv_vports(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->max_npiv_vports) +#define fc_host_serial_number(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->serial_number) +#define fc_host_manufacturer(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->manufacturer) +#define fc_host_model(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->model) +#define fc_host_model_description(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->model_description) +#define fc_host_hardware_version(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->hardware_version) +#define fc_host_driver_version(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->driver_version) +#define fc_host_firmware_version(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->firmware_version) +#define fc_host_optionrom_version(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->optionrom_version) +#define fc_host_port_id(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->port_id) +#define fc_host_port_type(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->port_type) +#define fc_host_port_state(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->port_state) +#define fc_host_active_fc4s(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->active_fc4s) +#define fc_host_speed(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->speed) +#define fc_host_fabric_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->fabric_name) +#define fc_host_symbolic_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name) +#define fc_host_system_hostname(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->system_hostname) +#define fc_host_tgtid_bind_type(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type) +#define fc_host_rports(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->rports) +#define fc_host_rport_bindings(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->rport_bindings) +#define fc_host_vports(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->vports) +#define fc_host_next_rport_number(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->next_rport_number) +#define fc_host_next_target_id(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->next_target_id) +#define fc_host_next_vport_number(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->next_vport_number) +#define fc_host_npiv_vports_inuse(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->npiv_vports_inuse) +#define fc_host_work_q_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->work_q_name) +#define fc_host_work_q(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->work_q) +#define fc_host_devloss_work_q_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name) +#define fc_host_devloss_work_q(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q) +#define fc_host_dev_loss_tmo(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->dev_loss_tmo) + + +struct fc_bsg_buffer { + unsigned int payload_len; + int sg_cnt; + struct scatterlist *sg_list; +}; + +/* Values for fc_bsg_job->state_flags (bitflags) */ +#define FC_RQST_STATE_INPROGRESS 0 +#define FC_RQST_STATE_DONE 1 + +struct fc_bsg_job { + struct Scsi_Host *shost; + struct fc_rport *rport; + struct device *dev; + struct request *req; + spinlock_t job_lock; + unsigned int state_flags; + unsigned int ref_cnt; + void (*job_done)(struct fc_bsg_job *); + + struct fc_bsg_request *request; + struct fc_bsg_reply *reply; + unsigned int request_len; + unsigned int reply_len; + /* + * On entry : reply_len indicates the buffer size allocated for + * the reply. + * + * Upon completion : the message handler must set reply_len + * to indicates the size of the reply to be returned to the + * caller. + */ + + /* DMA payloads for the request/response */ + struct fc_bsg_buffer request_payload; + struct fc_bsg_buffer reply_payload; + + void *dd_data; /* Used for driver-specific storage */ +}; + + +/* The functions by which the transport class and the driver communicate */ +struct fc_function_template { + void (*get_rport_dev_loss_tmo)(struct fc_rport *); + void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32); + + void (*get_starget_node_name)(struct scsi_target *); + void (*get_starget_port_name)(struct scsi_target *); + void (*get_starget_port_id)(struct scsi_target *); + + void (*get_host_port_id)(struct Scsi_Host *); + void (*get_host_port_type)(struct Scsi_Host *); + void (*get_host_port_state)(struct Scsi_Host *); + void (*get_host_active_fc4s)(struct Scsi_Host *); + void (*get_host_speed)(struct Scsi_Host *); + void (*get_host_fabric_name)(struct Scsi_Host *); + void (*get_host_symbolic_name)(struct Scsi_Host *); + void (*set_host_system_hostname)(struct Scsi_Host *); + + struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *); + void (*reset_fc_host_stats)(struct Scsi_Host *); + + int (*issue_fc_host_lip)(struct Scsi_Host *); + + void (*dev_loss_tmo_callbk)(struct fc_rport *); + void (*terminate_rport_io)(struct fc_rport *); + + void (*set_vport_symbolic_name)(struct fc_vport *); + int (*vport_create)(struct fc_vport *, bool); + int (*vport_disable)(struct fc_vport *, bool); + int (*vport_delete)(struct fc_vport *); + + /* target-mode drivers' functions */ + int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int); + int (* it_nexus_response)(struct Scsi_Host *, u64, int); + + /* bsg support */ + int (*bsg_request)(struct fc_bsg_job *); + int (*bsg_timeout)(struct fc_bsg_job *); + + /* allocation lengths for host-specific data */ + u32 dd_fcrport_size; + u32 dd_fcvport_size; + u32 dd_bsg_size; + + /* + * The driver sets these to tell the transport class it + * wants the attributes displayed in sysfs. If the show_ flag + * is not set, the attribute will be private to the transport + * class + */ + + /* remote port fixed attributes */ + unsigned long show_rport_maxframe_size:1; + unsigned long show_rport_supported_classes:1; + unsigned long show_rport_dev_loss_tmo:1; + + /* + * target dynamic attributes + * These should all be "1" if the driver uses the remote port + * add/delete functions (so attributes reflect rport values). + */ + unsigned long show_starget_node_name:1; + unsigned long show_starget_port_name:1; + unsigned long show_starget_port_id:1; + + /* host fixed attributes */ + unsigned long show_host_node_name:1; + unsigned long show_host_port_name:1; + unsigned long show_host_permanent_port_name:1; + unsigned long show_host_supported_classes:1; + unsigned long show_host_supported_fc4s:1; + unsigned long show_host_supported_speeds:1; + unsigned long show_host_maxframe_size:1; + unsigned long show_host_serial_number:1; + unsigned long show_host_manufacturer:1; + unsigned long show_host_model:1; + unsigned long show_host_model_description:1; + unsigned long show_host_hardware_version:1; + unsigned long show_host_driver_version:1; + unsigned long show_host_firmware_version:1; + unsigned long show_host_optionrom_version:1; + /* host dynamic attributes */ + unsigned long show_host_port_id:1; + unsigned long show_host_port_type:1; + unsigned long show_host_port_state:1; + unsigned long show_host_active_fc4s:1; + unsigned long show_host_speed:1; + unsigned long show_host_fabric_name:1; + unsigned long show_host_symbolic_name:1; + unsigned long show_host_system_hostname:1; + + unsigned long disable_target_scan:1; +}; + + +/** + * fc_remote_port_chkready - called to validate the remote port state + * prior to initiating io to the port. + * + * Returns a scsi result code that can be returned by the LLDD. + * + * @rport: remote port to be checked + **/ +static inline int +fc_remote_port_chkready(struct fc_rport *rport) +{ + int result; + + switch (rport->port_state) { + case FC_PORTSTATE_ONLINE: + if (rport->roles & FC_PORT_ROLE_FCP_TARGET) + result = 0; + else if (rport->flags & FC_RPORT_DEVLOSS_PENDING) + result = DID_IMM_RETRY << 16; + else + result = DID_NO_CONNECT << 16; + break; + case FC_PORTSTATE_BLOCKED: + if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) + result = DID_TRANSPORT_FAILFAST << 16; + else + result = DID_IMM_RETRY << 16; + break; + default: + result = DID_NO_CONNECT << 16; + break; + } + return result; +} + +static inline u64 wwn_to_u64(u8 *wwn) +{ + return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 | + (u64)wwn[2] << 40 | (u64)wwn[3] << 32 | + (u64)wwn[4] << 24 | (u64)wwn[5] << 16 | + (u64)wwn[6] << 8 | (u64)wwn[7]; +} + +static inline void u64_to_wwn(u64 inm, u8 *wwn) +{ + wwn[0] = (inm >> 56) & 0xff; + wwn[1] = (inm >> 48) & 0xff; + wwn[2] = (inm >> 40) & 0xff; + wwn[3] = (inm >> 32) & 0xff; + wwn[4] = (inm >> 24) & 0xff; + wwn[5] = (inm >> 16) & 0xff; + wwn[6] = (inm >> 8) & 0xff; + wwn[7] = inm & 0xff; +} + +/** + * fc_vport_set_state() - called to set a vport's state. Saves the old state, + * excepting the transitory states of initializing and sending the ELS + * traffic to instantiate the vport on the link. + * + * Assumes the driver has surrounded this with the proper locking to ensure + * a coherent state change. + * + * @vport: virtual port whose state is changing + * @new_state: new state + **/ +static inline void +fc_vport_set_state(struct fc_vport *vport, enum fc_vport_state new_state) +{ + if ((new_state != FC_VPORT_UNKNOWN) && + (new_state != FC_VPORT_INITIALIZING)) + vport->vport_last_state = vport->vport_state; + vport->vport_state = new_state; +} + +struct scsi_transport_template *fc_attach_transport( + struct fc_function_template *); +void fc_release_transport(struct scsi_transport_template *); +void fc_remove_host(struct Scsi_Host *); +struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost, + int channel, struct fc_rport_identifiers *ids); +void fc_remote_port_delete(struct fc_rport *rport); +void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles); +int scsi_is_fc_rport(const struct device *); +u32 fc_get_event_number(void); +void fc_host_post_event(struct Scsi_Host *shost, u32 event_number, + enum fc_host_event_code event_code, u32 event_data); +void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, + u32 data_len, char * data_buf, u64 vendor_id); + /* Note: when specifying vendor_id to fc_host_post_vendor_event() + * be sure to read the Vendor Type and ID formatting requirements + * specified in scsi_netlink.h + */ +struct fc_vport *fc_vport_create(struct Scsi_Host *shost, int channel, + struct fc_vport_identifiers *); +int fc_vport_terminate(struct fc_vport *vport); +int fc_block_scsi_eh(struct scsi_cmnd *cmnd); + +#endif /* SCSI_TRANSPORT_FC_H */ |