nvme-fc nvmet-fc: refactor for common LS definitions

Routines in the target will want to be used in the host as well.
Error definitions should now shared as both sides will process
requests and responses to requests.

Moved common declarations to new fc.h header kept in the host
subdirectory.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 133 insertions, 0 deletions

diff --git a/drivers/nvme/host/fc.h b/drivers/nvme/host/fc.h
new file mode 100644
index 000000000000..d2861cdd58ee
--- /dev/null
+++ b/drivers/nvme/host/fc.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2016, Avago Technologies
+ */
+
+#ifndef _NVME_FC_TRANSPORT_H
+#define _NVME_FC_TRANSPORT_H 1
+
+
+/*
+ * Common definitions between the nvme_fc (host) transport and
+ * nvmet_fc (target) transport implementation.
+ */
+
+/*
+ * ******************  FC-NVME LS HANDLING ******************
+ */
+
+static inline void
+nvme_fc_format_rsp_hdr(void *buf, u8 ls_cmd, __be32 desc_len, u8 rqst_ls_cmd)
+{
+	struct fcnvme_ls_acc_hdr *acc = buf;
+
+	acc->w0.ls_cmd = ls_cmd;
+	acc->desc_list_len = desc_len;
+	acc->rqst.desc_tag = cpu_to_be32(FCNVME_LSDESC_RQST);
+	acc->rqst.desc_len =
+			fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst));
+	acc->rqst.w0.ls_cmd = rqst_ls_cmd;
+}
+
+static inline int
+nvme_fc_format_rjt(void *buf, u16 buflen, u8 ls_cmd,
+			u8 reason, u8 explanation, u8 vendor)
+{
+	struct fcnvme_ls_rjt *rjt = buf;
+
+	nvme_fc_format_rsp_hdr(buf, FCNVME_LSDESC_RQST,
+			fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_rjt)),
+			ls_cmd);
+	rjt->rjt.desc_tag = cpu_to_be32(FCNVME_LSDESC_RJT);
+	rjt->rjt.desc_len = fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rjt));
+	rjt->rjt.reason_code = reason;
+	rjt->rjt.reason_explanation = explanation;
+	rjt->rjt.vendor = vendor;
+
+	return sizeof(struct fcnvme_ls_rjt);
+}
+
+/* Validation Error indexes into the string table below */
+enum {
+	VERR_NO_ERROR		= 0,
+	VERR_CR_ASSOC_LEN	= 1,
+	VERR_CR_ASSOC_RQST_LEN	= 2,
+	VERR_CR_ASSOC_CMD	= 3,
+	VERR_CR_ASSOC_CMD_LEN	= 4,
+	VERR_ERSP_RATIO		= 5,
+	VERR_ASSOC_ALLOC_FAIL	= 6,
+	VERR_QUEUE_ALLOC_FAIL	= 7,
+	VERR_CR_CONN_LEN	= 8,
+	VERR_CR_CONN_RQST_LEN	= 9,
+	VERR_ASSOC_ID		= 10,
+	VERR_ASSOC_ID_LEN	= 11,
+	VERR_NO_ASSOC		= 12,
+	VERR_CONN_ID		= 13,
+	VERR_CONN_ID_LEN	= 14,
+	VERR_INVAL_CONN		= 15,
+	VERR_CR_CONN_CMD	= 16,
+	VERR_CR_CONN_CMD_LEN	= 17,
+	VERR_DISCONN_LEN	= 18,
+	VERR_DISCONN_RQST_LEN	= 19,
+	VERR_DISCONN_CMD	= 20,
+	VERR_DISCONN_CMD_LEN	= 21,
+	VERR_DISCONN_SCOPE	= 22,
+	VERR_RS_LEN		= 23,
+	VERR_RS_RQST_LEN	= 24,
+	VERR_RS_CMD		= 25,
+	VERR_RS_CMD_LEN		= 26,
+	VERR_RS_RCTL		= 27,
+	VERR_RS_RO		= 28,
+	VERR_LSACC		= 29,
+	VERR_LSDESC_RQST	= 30,
+	VERR_LSDESC_RQST_LEN	= 31,
+	VERR_CR_ASSOC		= 32,
+	VERR_CR_ASSOC_ACC_LEN	= 33,
+	VERR_CR_CONN		= 34,
+	VERR_CR_CONN_ACC_LEN	= 35,
+	VERR_DISCONN		= 36,
+	VERR_DISCONN_ACC_LEN	= 37,
+};
+
+static char *validation_errors[] = {
+	"OK",
+	"Bad CR_ASSOC Length",
+	"Bad CR_ASSOC Rqst Length",
+	"Not CR_ASSOC Cmd",
+	"Bad CR_ASSOC Cmd Length",
+	"Bad Ersp Ratio",
+	"Association Allocation Failed",
+	"Queue Allocation Failed",
+	"Bad CR_CONN Length",
+	"Bad CR_CONN Rqst Length",
+	"Not Association ID",
+	"Bad Association ID Length",
+	"No Association",
+	"Not Connection ID",
+	"Bad Connection ID Length",
+	"Invalid Connection ID",
+	"Not CR_CONN Cmd",
+	"Bad CR_CONN Cmd Length",
+	"Bad DISCONN Length",
+	"Bad DISCONN Rqst Length",
+	"Not DISCONN Cmd",
+	"Bad DISCONN Cmd Length",
+	"Bad Disconnect Scope",
+	"Bad RS Length",
+	"Bad RS Rqst Length",
+	"Not RS Cmd",
+	"Bad RS Cmd Length",
+	"Bad RS R_CTL",
+	"Bad RS Relative Offset",
+	"Not LS_ACC",
+	"Not LSDESC_RQST",
+	"Bad LSDESC_RQST Length",
+	"Not CR_ASSOC Rqst",
+	"Bad CR_ASSOC ACC Length",
+	"Not CR_CONN Rqst",
+	"Bad CR_CONN ACC Length",
+	"Not Disconnect Rqst",
+	"Bad Disconnect ACC Length",
+};
+
+#endif /* _NVME_FC_TRANSPORT_H */