diff options
Diffstat (limited to 'include/scsi/libfcoe.h')
| -rw-r--r-- | include/scsi/libfcoe.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h index feb6a94c90ea..8c1638b8c28e 100644 --- a/include/scsi/libfcoe.h +++ b/include/scsi/libfcoe.h @@ -33,6 +33,12 @@ #define FCOE_MAX_CMD_LEN 16 /* Supported CDB length */ /* + * Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload) + * + 4 (FC CRC) + 4 (FCoE trailer) = 2158 bytes + */ +#define FCOE_MTU 2158 + +/* * FIP tunable parameters. */ #define FCOE_CTLR_START_DELAY 2000 /* mS after first adv. to choose FCF */ @@ -221,6 +227,8 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_lport *, u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int); int fcoe_libfc_config(struct fc_lport *, struct fcoe_ctlr *, const struct libfc_function_template *, int init_fcp); +u32 fcoe_fc_crc(struct fc_frame *fp); +int fcoe_start_io(struct sk_buff *skb); /** * is_fip_mode() - returns true if FIP mode selected. @@ -231,5 +239,102 @@ static inline bool is_fip_mode(struct fcoe_ctlr *fip) return fip->state == FIP_ST_ENABLED; } +/* helper for FCoE SW HBA drivers, can include subven and subdev if needed. The + * modpost would use pci_device_id table to auto-generate formatted module alias + * into the corresponding .mod.c file, but there may or may not be a pci device + * id table for FCoE drivers so we use the following helper for build the fcoe + * driver module alias. + */ +#define MODULE_ALIAS_FCOE_PCI(ven, dev) \ + MODULE_ALIAS("fcoe-pci:" \ + "v" __stringify(ven) \ + "d" __stringify(dev) "sv*sd*bc*sc*i*") + +/* the name of the default FCoE transport driver fcoe.ko */ +#define FCOE_TRANSPORT_DEFAULT "fcoe" + +/* struct fcoe_transport - The FCoE transport interface + * @name: a vendor specific name for their FCoE transport driver + * @attached: whether this transport is already attached + * @list: list linkage to all attached transports + * @match: handler to allow the transport driver to match up a given netdev + * @create: handler to sysfs entry of create for FCoE instances + * @destroy: handler to sysfs entry of destroy for FCoE instances + * @enable: handler to sysfs entry of enable for FCoE instances + * @disable: handler to sysfs entry of disable for FCoE instances + */ +struct fcoe_transport { + char name[IFNAMSIZ]; + bool attached; + struct list_head list; + bool (*match) (struct net_device *device); + int (*create) (struct net_device *device, enum fip_state fip_mode); + int (*destroy) (struct net_device *device); + int (*enable) (struct net_device *device); + int (*disable) (struct net_device *device); +}; + +/** + * struct fcoe_percpu_s - The context for FCoE receive thread(s) + * @thread: The thread context + * @fcoe_rx_list: The queue of pending packets to process + * @page: The memory page for calculating frame trailer CRCs + * @crc_eof_offset: The offset into the CRC page pointing to available + * memory for a new trailer + */ +struct fcoe_percpu_s { + struct task_struct *thread; + struct sk_buff_head fcoe_rx_list; + struct page *crc_eof_page; + int crc_eof_offset; +}; + +/** + * struct fcoe_port - The FCoE private structure + * @priv: The associated fcoe interface. The structure is + * defined by the low level driver + * @lport: The associated local port + * @fcoe_pending_queue: The pending Rx queue of skbs + * @fcoe_pending_queue_active: Indicates if the pending queue is active + * @max_queue_depth: Max queue depth of pending queue + * @min_queue_depth: Min queue depth of pending queue + * @timer: The queue timer + * @destroy_work: Handle for work context + * (to prevent RTNL deadlocks) + * @data_srt_addr: Source address for data + * + * An instance of this structure is to be allocated along with the + * Scsi_Host and libfc fc_lport structures. + */ +struct fcoe_port { + void *priv; + struct fc_lport *lport; + struct sk_buff_head fcoe_pending_queue; + u8 fcoe_pending_queue_active; + u32 max_queue_depth; + u32 min_queue_depth; + struct timer_list timer; + struct work_struct destroy_work; + u8 data_src_addr[ETH_ALEN]; +}; +void fcoe_clean_pending_queue(struct fc_lport *); +void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb); +void fcoe_queue_timer(ulong lport); +int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen, + struct fcoe_percpu_s *fps); + +/** + * struct netdev_list + * A mapping from netdevice to fcoe_transport + */ +struct fcoe_netdev_mapping { + struct list_head list; + struct net_device *netdev; + struct fcoe_transport *ft; +}; + +/* fcoe transports registration and deregistration */ +int fcoe_transport_attach(struct fcoe_transport *ft); +int fcoe_transport_detach(struct fcoe_transport *ft); #endif /* _LIBFCOE_H */ |