Revert various related big-endian PI commits

This reverts a series of related changes that mapped storage and
reference tags into the shared region over multiple CDWords in
big-endian ordering. Keith confirmed the CDWords are always in
little-endian ordering, and that the MSB-LSB representation in the spec
is for the metadata payload itself.

Signed-off-by: Brandon Paupore <[email protected]>

Author: brandon-paupore-sndk

src/nvme/ioctl.c

@@ -1920,9 +1920,9 @@ static int nvme_set_var_size_tags(__u32 *cmd_dw2, __u32 *cmd_dw3, __u32 *cmd_dw1
 		return -1;
 	}
 
-	*cmd_dw2 = cpu_to_be32(cdw2);
-	*cmd_dw3 = cpu_to_be32(cdw3);
-	*cmd_dw14 = cpu_to_be32(cdw14);
+	*cmd_dw2 = cpu_to_le32(cdw2);
+	*cmd_dw3 = cpu_to_le32(cdw3);
+	*cmd_dw14 = cpu_to_le32(cdw14);
 	return 0;
 }
 
@@ -1944,9 +1944,9 @@ int nvme_io(struct nvme_io_args *args, __u8 opcode)
 	cdw15 = args->apptag | (args->appmask << 16);
 
 	if (args->args_size == size_v1) {
-		cdw2 = (args->storage_tag >> 32) & 0xffff;
-		cdw3 = args->storage_tag & 0xffffffff;
-		cdw14 = args->reftag;
+		cdw2 = cpu_to_le32((args->storage_tag >> 32) & 0xffff);
+		cdw3 = cpu_to_le32(args->storage_tag & 0xffffffff);
+		cdw14 = cpu_to_le32(args->reftag);
 	} else {
 		if (nvme_set_var_size_tags(&cdw2, &cdw3, &cdw14,
 				args->pif,

src/nvme/util.c

@@ -416,7 +416,7 @@ static inline void nvme_init_copy_range_elbt(__u8 *elbt, __u64 eilbrt)
 	int i;
 
 	for (i = 0; i < 8; i++)
-		elbt[9 - i] = (eilbrt >> (8 * i)) & 0xff;
+		elbt[i + 2] = (eilbrt >> (8 * i)) & 0xff;
 	elbt[1] = 0;
 	elbt[0] = 0;
 }