scsi: lpfc: add support for posting FC events on FPIN reception

This patch adds support to recognize FPIN ELS's that are received.  When
one is received, the fc transport will be called to handle the the FPIN.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_els.c

@@ -8450,6 +8450,14 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 		rjt_err = LSRJT_UNABLE_TPC;
 		rjt_exp = LSEXP_INVALID_OX_RX;
 		break;
+	case ELS_CMD_FPIN:
+		/*
+		 * Received FPIN from fabric - pass it to the
+		 * transport FPIN handler.
+		 */
+		fc_host_fpin_rcv(shost, elsiocb->iocb.unsli3.rcvsli3.acc_len,
+				(char *)payload);
+		break;
 	default:
 		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
 			"RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",

drivers/scsi/lpfc/lpfc_hw.h

@@ -560,6 +560,8 @@ struct fc_vft_header {
 #define fc_vft_hdr_hopct_WORD		word1
 };
 
+#include <uapi/scsi/fc/fc_els.h>
+
 /*
  *  Extended Link Service LS_COMMAND codes (Payload Word 0)
  */
@@ -603,6 +605,7 @@ struct fc_vft_header {
 #define ELS_CMD_RNID      0x78000000
 #define ELS_CMD_LIRR      0x7A000000
 #define ELS_CMD_LCB	  0x81000000
+#define ELS_CMD_FPIN	  0x16000000
 #else	/*  __LITTLE_ENDIAN_BITFIELD */
 #define ELS_CMD_MASK      0xffff
 #define ELS_RSP_MASK      0xff
@@ -643,6 +646,7 @@ struct fc_vft_header {
 #define ELS_CMD_RNID      0x78
 #define ELS_CMD_LIRR      0x7A
 #define ELS_CMD_LCB	  0x81
+#define ELS_CMD_FPIN	  ELS_FPIN
 #endif
 
 /*