scsi: qla2xxx: edif: Add send, receive, and accept for auth_els

Some FC adapters from Marvell offer the ability to encrypt data in flight
(EDIF). This feature requires an application to act as an authenticator.

Add the ability for authentication application to send and retrieve
messages as part of the authentication process via existing
FC_BSG_HST_ELS_NOLOGIN BSG interface.

To send a message, application is expected to format the data in the AUTH
ELS format. Refer to FC-SP2 for details.

If a message was received, application is required to reply with either a
LS_ACC or LS_RJT complete the exchange using the same interface. Otherwise,
remote device will treat it as a timeout.

Link: https://lore.kernel.org/r/20210624052606.21613-4-njavali@marvell.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Co-developed-by: Larry Wisneski <Larry.Wisneski@marvell.com>
Signed-off-by: Larry Wisneski <Larry.Wisneski@marvell.com>
Co-developed-by: Duane Grigsby <duane.grigsby@marvell.com>
Signed-off-by: Duane Grigsby <duane.grigsby@marvell.com>
Co-developed-by: Rick Hicksted Jr <rhicksted@marvell.com>
Signed-off-by: Rick Hicksted Jr <rhicksted@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index ec28023b738f..fbf5ca75cf23 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -341,6 +341,13 @@ struct name_list_extended {
 	u32			size;
 	u8			sent;
 };
+
+struct els_reject {
+	struct fc_els_ls_rjt *c;
+	dma_addr_t  cdma;
+	u16 size;
+};
+
 /*
  * Timeout timer counts in seconds
  */
@@ -618,6 +625,21 @@ struct srb_iocb {
 #define SRB_PRLI_CMD	21
 #define SRB_CTRL_VP	22
 #define SRB_PRLO_CMD	23
+#define SRB_SA_UPDATE	25
+#define SRB_ELS_CMD_HST_NOLOGIN 26
+#define SRB_SA_REPLACE	27
+
+struct qla_els_pt_arg {
+	u8 els_opcode;
+	u8 vp_idx;
+	__le16 nport_handle;
+	u16 control_flags;
+	__le32 rx_xchg_address;
+	port_id_t did;
+	u32 tx_len, tx_byte_count, rx_len, rx_byte_count;
+	dma_addr_t tx_addr, rx_addr;
+
+};
 
 enum {
 	TYPE_SRB,
@@ -631,6 +653,13 @@ struct iocb_resource {
 	u16 iocb_cnt;
 };
 
+struct bsg_cmd {
+	struct bsg_job *bsg_job;
+	union {
+		struct qla_els_pt_arg els_arg;
+	} u;
+};
+
 typedef struct srb {
 	/*
 	 * Do not move cmd_type field, it needs to
@@ -663,7 +692,21 @@ typedef struct srb {
 		struct srb_iocb iocb_cmd;
 		struct bsg_job *bsg_job;
 		struct srb_cmd scmd;
+		struct bsg_cmd bsg_cmd;
 	} u;
+	struct {
+		bool remapped;
+		struct {
+			dma_addr_t dma;
+			void *buf;
+			uint len;
+		} req;
+		struct {
+			dma_addr_t dma;
+			void *buf;
+			uint len;
+		} rsp;
+	} remap;
 	/*
 	 * Report completion status @res and call sp_put(@sp). @res is
 	 * an NVMe status code, a SCSI result (e.g. DID_OK << 16) or a
@@ -4640,8 +4683,12 @@ struct qla_hw_data {
 	struct qla_hw_data_stat stat;
 	pci_error_state_t pci_error_state;
 	u64 prev_cmd_cnt;
+	struct dma_pool *purex_dma_pool;
+	struct els_reject elsrej;
 };
 
+#define RX_ELS_SIZE (roundup(sizeof(struct enode) + ELS_MAX_PAYLOAD, SMP_CACHE_BYTES))
+
 struct active_regions {
 	uint8_t global;
 	struct {
@@ -5113,6 +5160,7 @@ enum nexus_wait_type {
 	WAIT_LUN,
 };
 
+#define QLA_SKIP_HANDLE QLA_TGT_SKIP_HANDLE
 /* Refer to SNIA SFF 8247 */
 struct sff_8247_a0 {
 	u8 txid;	/* transceiver id */