scsi: lpfc: SLI path split: Refactor CT paths

This patch refactors the CT paths to use SLI-4 as the primary interface.

 - Introduce generic lpfc_sli_prep_gen_req jump table routine

 - Introduce generic lpfc_sli_prep_xmit_seq64 jump table routine

 - Rename lpfcdiag_loop_post_rxbufs to lpfcdiag_sli3_loop_post_rxbufs to
   indicate that it is an SLI3 only path

 - Create new prep_wqe routine for unsolicited ELS rsp WQEs.

 - Conversion away from using SLI-3 iocb structures to set/access fields in
   common routines. Use the new generic get/set routines that were added.
   This move changes code from indirect structure references to using local
   variables with the generic routines.

 - Refactor routines when setting non-generic fields, to have both SLI3 and
   SLI4 specific sections. This replaces the set-as-SLI3 then translate to
   SLI4 behavior of the past.

Link: https://lore.kernel.org/r/20220225022308.16486-13-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc.h

@@ -968,6 +968,13 @@ struct lpfc_hba {
 					    struct lpfc_dmabuf *bmp,
 					    u16 cmd_size, u32 did, u32 elscmd,
 					    u8 tmo, u8 expect_rsp);
+	void (*__lpfc_sli_prep_gen_req)(struct lpfc_iocbq *cmdiocbq,
+					struct lpfc_dmabuf *bmp, u16 rpi,
+					u32 num_entry, u8 tmo);
+	void (*__lpfc_sli_prep_xmit_seq64)(struct lpfc_iocbq *cmdiocbq,
+					   struct lpfc_dmabuf *bmp, u16 rpi,
+					   u16 ox_id, u32 num_entry, u8 rctl,
+					   u8 last_seq, u8 cr_cx_cmd);
 
 	/* expedite pool */
 	struct lpfc_epd_pool epd_pool;
@@ -1849,6 +1856,15 @@ u16 get_job_rcvoxid(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
 		return iocbq->iocb.unsli3.rcvsli3.ox_id;
 }
 
+static inline
+u32 get_job_data_placed(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
+{
+	if (phba->sli_rev == LPFC_SLI_REV4)
+		return iocbq->wcqe_cmpl.total_data_placed;
+	else
+		return iocbq->iocb.un.genreq64.bdl.bdeSize;
+}
+
 static inline
 u32 get_job_els_rsp64_did(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
 {