[SCSI] fcoe: moves common FCoE library API functions to libfcoe module

Moves these functions as-is from fcoe.c to libfcoe.c, since
they're are common routines:

	- fcoe_wwn_from_mac
	- fcoe_libfc_config

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 17acbcc025aa..dff97fcf8837 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -18,7 +18,74 @@
  */
 
 #include <linux/module.h>
+#include <linux/netdevice.h>
+
+#include <scsi/libfc.h>
 
 MODULE_AUTHOR("Open-FCoE.org");
 MODULE_DESCRIPTION("FCoE");
 MODULE_LICENSE("GPL v2");
+
+/**
+ * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN.
+ * @mac: mac address
+ * @scheme: check port
+ * @port: port indicator for converting
+ *
+ * Returns: u64 fc world wide name
+ */
+u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
+                      unsigned int scheme, unsigned int port)
+{
+        u64 wwn;
+        u64 host_mac;
+
+        /* The MAC is in NO, so flip only the low 48 bits */
+        host_mac = ((u64) mac[0] << 40) |
+                ((u64) mac[1] << 32) |
+                ((u64) mac[2] << 24) |
+                ((u64) mac[3] << 16) |
+                ((u64) mac[4] << 8) |
+                (u64) mac[5];
+
+        WARN_ON(host_mac >= (1ULL << 48));
+        wwn = host_mac | ((u64) scheme << 60);
+        switch (scheme) {
+        case 1:
+                WARN_ON(port != 0);
+                break;
+        case 2:
+                WARN_ON(port >= 0xfff);
+                wwn |= (u64) port << 48;
+                break;
+        default:
+                WARN_ON(1);
+                break;
+        }
+
+        return wwn;
+}
+EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
+
+/**
+ * fcoe_libfc_config() - sets up libfc related properties for lport
+ * @lp: ptr to the fc_lport
+ * @tt: libfc function template
+ *
+ * Returns : 0 for success
+ */
+int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
+{
+        /* Set the function pointers set by the LLDD */
+        memcpy(&lp->tt, tt, sizeof(*tt));
+        if (fc_fcp_init(lp))
+                return -ENOMEM;
+        fc_exch_init(lp);
+        fc_elsct_init(lp);
+        fc_lport_init(lp);
+        fc_rport_init(lp);
+        fc_disc_init(lp);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_libfc_config);