scsi: mpi3mr: Add EEDP DIF DIX support

Link: https://lore.kernel.org/r/20210520152545.2710479-24-kashyap.desai@broadcom.com
Cc: sathya.prakash@broadcom.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr.h

@@ -123,6 +123,7 @@ extern struct list_head mrioc_list;
 #define MPI3MR_SENSEBUF_SZ	256
 #define MPI3MR_SENSEBUF_FACTOR	3
 #define MPI3MR_CHAINBUF_FACTOR	3
+#define MPI3MR_CHAINBUFDIX_FACTOR	2
 
 /* Invalid target device handle */
 #define MPI3MR_INVALID_DEV_HANDLE	0xFFFF
@@ -562,17 +563,21 @@ struct chain_element {
  *
  * @host_tag: Host tag specific to operational queue
  * @in_lld_scope: Command in LLD scope or not
+ * @meta_sg_valid: DIX command with meta data SGL or not
  * @scmd: SCSI Command pointer
  * @req_q_idx: Operational request queue index
  * @chain_idx: Chain frame index
+ * @meta_chain_idx: Chain frame index of meta data SGL
  * @mpi3mr_scsiio_req: MPI SCSI IO request
  */
 struct scmd_priv {
 	u16 host_tag;
 	u8 in_lld_scope;
+	u8 meta_sg_valid;
 	struct scsi_cmnd *scmd;
 	u16 req_q_idx;
 	int chain_idx;
+	int meta_chain_idx;
 	u8 mpi3mr_scsiio_req[MPI3MR_ADMIN_REQ_FRAME_SZ];
 };
 

drivers/scsi/mpi3mr/mpi3mr_fw.c

@@ -9,6 +9,7 @@
 
 #include "mpi3mr.h"
 #include <linux/io-64-nonatomic-lo-hi.h>
+extern int prot_mask;
 
 #if defined(writeq) && defined(CONFIG_64BIT)
 static inline void mpi3mr_writeq(__u64 b, volatile void __iomem *addr)
@@ -2749,6 +2750,12 @@ static int mpi3mr_alloc_chain_bufs(struct mpi3mr_ioc *mrioc)
 
 	num_chains = mrioc->max_host_ios / MPI3MR_CHAINBUF_FACTOR;
 
+	if (prot_mask & (SHOST_DIX_TYPE0_PROTECTION
+	    | SHOST_DIX_TYPE1_PROTECTION
+	    | SHOST_DIX_TYPE2_PROTECTION
+	    | SHOST_DIX_TYPE3_PROTECTION))
+		num_chains += (num_chains / MPI3MR_CHAINBUFDIX_FACTOR);
+
 	mrioc->chain_buf_count = num_chains;
 	sz = sizeof(struct chain_element) * num_chains;
 	mrioc->chain_sgl_list = kzalloc(sz, GFP_KERNEL);