Merge git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

[karo-tx-linux.git] / include / scsi / libfcoe.h

diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index feb6a94c90eae10c8c23207134caebe69ac52b6a..8c1638b8c28e776b9261cd604a1036708a8f6933 100644 (file)
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -32,6 +32,12 @@
 
 #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.
  */
@@ -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 */