X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_transport_fc.h;h=6d28b03176570fbcb3b314f1e29122df8d25f0d3;hb=a030541d6dd71712d1989c26d9e63a698c64d5d8;hp=967e895672b53e64ecdc2854465c44b1a9428879;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h index 967e89567..6d28b0317 100644 --- a/include/scsi/scsi_transport_fc.h +++ b/include/scsi/scsi_transport_fc.h @@ -16,41 +16,498 @@ * 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) 2004-2005 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 +#include +#include struct scsi_transport_template; -struct fc_transport_attrs { - int port_id; - uint64_t node_name; - uint64_t port_name; + +/* + * 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_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, }; -/* accessor functions */ -#define fc_port_id(x) (((struct fc_transport_attrs *)&(x)->transport_data)->port_id) -#define fc_node_name(x) (((struct fc_transport_attrs *)&(x)->transport_data)->node_name) -#define fc_port_name(x) (((struct fc_transport_attrs *)&(x)->transport_data)->port_name) + +/* + * 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_4GBIT 4 +#define FC_PORTSPEED_10GBIT 8 +#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 Remote 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_RPORT_ROLE_UNKNOWN 0x00 +#define FC_RPORT_ROLE_FCP_TARGET 0x01 +#define FC_RPORT_ROLE_FCP_INITIATOR 0x02 +#define FC_RPORT_ROLE_IP_PORT 0x04 + + +/* + * 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 class_device_attribute class_device_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; + + /* 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 work_struct dev_loss_work; + struct work_struct scan_work; + struct work_struct stgt_delete_work; + struct work_struct rport_delete_work; +} __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 dev_to_rport(d) \ + container_of(d, struct fc_rport, dev) +#define transport_class_to_rport(classdev) \ + dev_to_rport(classdev->dev) +#define rport_to_shost(r) \ + dev_to_shost(r->dev.parent) + +/* + * FC SCSI Target Attributes + * + * The SCSI Target is considered an extention 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; +}; + + +/* + * 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]; + char symbolic_name[FC_SYMBOLIC_NAME_SIZE]; + u32 supported_speeds; + u32 maxframe_size; + char serial_number[FC_SERIAL_NUMBER_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; + + /* Private (Transport-managed) Attributes */ + enum fc_tgtid_binding_type tgtid_bind_type; + + /* internal data */ + struct list_head rports; + struct list_head rport_bindings; + u32 next_rport_number; + u32 next_target_id; + + /* work queues for rport state manipulation */ + char work_q_name[KOBJ_NAME_LEN]; + struct workqueue_struct *work_q; + char devloss_work_q_name[KOBJ_NAME_LEN]; + struct workqueue_struct *devloss_work_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_symbolic_name(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->symbolic_name) +#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_serial_number(x) \ + (((struct fc_host_attrs *)(x)->shost_data)->serial_number) +#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_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_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_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) + /* The functions by which the transport class and the driver communicate */ struct fc_function_template { - void (*get_port_id)(struct scsi_device *); - void (*get_node_name)(struct scsi_device *); - void (*get_port_name)(struct scsi_device *); - /* The driver sets these to tell the transport class it + 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 *); + + 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 *); + + /* allocation lengths for host-specific data */ + u32 dd_fcrport_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 */ - unsigned long show_port_id:1; - unsigned long show_node_name:1; - unsigned long show_port_name:1; - /* Private Attributes */ + * 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_symbolic_name:1; + unsigned long show_host_supported_speeds:1; + unsigned long show_host_maxframe_size:1; + unsigned long show_host_serial_number: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; }; -struct scsi_transport_template *fc_attach_transport(struct fc_function_template *); + +/** + * 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_RPORT_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: + result = DID_IMM_RETRY << 16; + break; + default: + result = DID_NO_CONNECT << 16; + break; + } + return result; +} + + +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 *); + +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]; +} #endif /* SCSI_TRANSPORT_FC_H */