[SCSI] qla4xxx: support iscsiadm session mgmt

Add scsi_transport_iscsi hooks in qla4xxx to support
iSCSI session management using iscsiadm.

This patch is based on discussion here
http://groups.google.com/group/open-iscsi/browse_thread/thread/e89fd888baf656a0#

Now users can use iscsiadm to do target discovery and do login/logout to
individual targets using the qla4xxx iSCSI class interface.

This patch leaves some dead code, but to make it easier to review
we are leaving and in the next patch we will remove that old code.

V2 - NOTE: Added code to avoid waiting for AEN during login/logout
in the driver, instead added a kernel to user event
to notify iscsid about login status. Because of this
iscsid will not get blocked.

Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 75 insertions, 7 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_fw.h b/drivers/scsi/qla4xxx/ql4_fw.h
index 83e009cafa3b..99098d51543b 100644
--- a/drivers/scsi/qla4xxx/ql4_fw.h
+++ b/drivers/scsi/qla4xxx/ql4_fw.h
@@ -331,9 +331,11 @@ struct qla_flt_region {
 #define MBOX_CMD_WRITE_FLASH			0x0025
 #define MBOX_CMD_READ_FLASH			0x0026
 #define MBOX_CMD_CLEAR_DATABASE_ENTRY		0x0031
+#define MBOX_CMD_CONN_OPEN			0x0074
 #define MBOX_CMD_CONN_CLOSE_SESS_LOGOUT		0x0056
-#define LOGOUT_OPTION_CLOSE_SESSION		0x01
-#define LOGOUT_OPTION_RELOGIN			0x02
+#define LOGOUT_OPTION_CLOSE_SESSION		0x0002
+#define LOGOUT_OPTION_RELOGIN			0x0004
+#define LOGOUT_OPTION_FREE_DDB			0x0008
 #define MBOX_CMD_EXECUTE_IOCB_A64		0x005A
 #define MBOX_CMD_INITIALIZE_FIRMWARE		0x0060
 #define MBOX_CMD_GET_INIT_FW_CTRL_BLOCK		0x0061
@@ -342,6 +344,7 @@ struct qla_flt_region {
 #define MBOX_CMD_GET_DATABASE_ENTRY		0x0064
 #define DDB_DS_UNASSIGNED			0x00
 #define DDB_DS_NO_CONNECTION_ACTIVE		0x01
+#define DDB_DS_DISCOVERY			0x02
 #define DDB_DS_SESSION_ACTIVE			0x04
 #define DDB_DS_SESSION_FAILED			0x06
 #define DDB_DS_LOGIN_IN_PROCESS			0x07
@@ -375,7 +378,10 @@ struct qla_flt_region {
 #define FW_ADDSTATE_DHCPv4_LEASE_EXPIRED	0x0008
 #define FW_ADDSTATE_LINK_UP			0x0010
 #define FW_ADDSTATE_ISNS_SVC_ENABLED		0x0020
+
 #define MBOX_CMD_GET_DATABASE_ENTRY_DEFAULTS	0x006B
+#define IPV6_DEFAULT_DDB_ENTRY			0x0001
+
 #define MBOX_CMD_CONN_OPEN_SESS_LOGIN		0x0074
 #define MBOX_CMD_GET_CRASH_RECORD		0x0076	/* 4010 only */
 #define MBOX_CMD_GET_CONN_EVENT_LOG		0x0077
@@ -463,7 +469,8 @@ struct addr_ctrl_blk {
 	uint8_t res0;	/* 07 */
 	uint16_t eth_mtu_size;	/* 08-09 */
 	uint16_t add_fw_options;	/* 0A-0B */
-#define SERIALIZE_TASK_MGMT		0x0400
+#define ADFWOPT_SERIALIZE_TASK_MGMT	0x0400
+#define ADFWOPT_AUTOCONN_DISABLE	0x0002
 
 	uint8_t hb_interval;	/* 0C */
 	uint8_t inst_num; /* 0D */
@@ -655,11 +662,30 @@ struct addr_ctrl_blk_def {
 
 /*************************************************************************/
 
+#define MAX_CHAP_ENTRIES_40XX	128
+#define MAX_CHAP_ENTRIES_82XX	1024
+
+struct ql4_chap_table {
+	uint16_t link;
+	uint8_t flags;
+	uint8_t secret_len;
+#define MIN_CHAP_SECRET_LEN	12
+#define MAX_CHAP_SECRET_LEN	100
+	uint8_t secret[MAX_CHAP_SECRET_LEN];
+#define MAX_CHAP_NAME_LEN	256
+	uint8_t name[MAX_CHAP_NAME_LEN];
+	uint16_t reserved;
+#define CHAP_VALID_COOKIE	0x4092
+#define CHAP_INVALID_COOKIE	0xFFEE
+	uint16_t cookie;
+};
+
 struct dev_db_entry {
 	uint16_t options;	/* 00-01 */
 #define DDB_OPT_DISC_SESSION  0x10
 #define DDB_OPT_TARGET	      0x02 /* device is a target */
 #define DDB_OPT_IPV6_DEVICE	0x100
+#define DDB_OPT_AUTO_SENDTGTS_DISABLE		0x40
 #define DDB_OPT_IPV6_NULL_LINK_LOCAL		0x800 /* post connection */
 #define DDB_OPT_IPV6_FW_DEFINED_LINK_LOCAL	0x800 /* pre connection */
 
@@ -670,6 +696,7 @@ struct dev_db_entry {
 	uint16_t tcp_options;	/* 0A-0B */
 	uint16_t ip_options;	/* 0C-0D */
 	uint16_t iscsi_max_rcv_data_seg_len;	/* 0E-0F */
+#define BYTE_UNITS	512
 	uint32_t res1;	/* 10-13 */
 	uint16_t iscsi_max_snd_data_seg_len;	/* 14-15 */
 	uint16_t iscsi_first_burst_len;	/* 16-17 */
@@ -853,6 +880,7 @@ struct qla4_header {
 
 	uint8_t entryStatus;
 	uint8_t systemDefined;
+#define SD_ISCSI_PDU	0x01
 	uint8_t entryCount;
 
 	/* SyetemDefined definition */
@@ -1010,21 +1038,22 @@ struct passthru0 {
 	struct qla4_header hdr;		       /* 00-03 */
 	uint32_t handle;	/* 04-07 */
 	uint16_t target;	/* 08-09 */
-	uint16_t connectionID;	/* 0A-0B */
+	uint16_t connection_id;	/* 0A-0B */
 #define ISNS_DEFAULT_SERVER_CONN_ID	((uint16_t)0x8000)
 
-	uint16_t controlFlags;	/* 0C-0D */
+	uint16_t control_flags;	/* 0C-0D */
 #define PT_FLAG_ETHERNET_FRAME		0x8000
 #define PT_FLAG_ISNS_PDU		0x8000
 #define PT_FLAG_SEND_BUFFER		0x0200
 #define PT_FLAG_WAIT_4_RESPONSE		0x0100
+#define PT_FLAG_ISCSI_PDU		0x1000
 
 	uint16_t timeout;	/* 0E-0F */
 #define PT_DEFAULT_TIMEOUT		30 /* seconds */
 
-	struct data_seg_a64 outDataSeg64;	/* 10-1B */
+	struct data_seg_a64 out_dsd;    /* 10-1B */
 	uint32_t res1;		/* 1C-1F */
-	struct data_seg_a64 inDataSeg64;	/* 20-2B */
+	struct data_seg_a64 in_dsd;     /* 20-2B */
 	uint8_t res2[20];	/* 2C-3F */
 };
 
@@ -1057,4 +1086,43 @@ struct response {
 #define RESPONSE_PROCESSED	0xDEADDEAD	/* Signature */
 };
 
+struct ql_iscsi_stats {
+	uint8_t reserved1[656]; /* 0000-028F */
+	uint32_t tx_cmd_pdu; /* 0290-0293 */
+	uint32_t tx_resp_pdu; /* 0294-0297 */
+	uint32_t rx_cmd_pdu; /* 0298-029B */
+	uint32_t rx_resp_pdu; /* 029C-029F */
+
+	uint64_t tx_data_octets; /* 02A0-02A7 */
+	uint64_t rx_data_octets; /* 02A8-02AF */
+
+	uint32_t hdr_digest_err; /* 02B0–02B3 */
+	uint32_t data_digest_err; /* 02B4–02B7 */
+	uint32_t conn_timeout_err; /* 02B8–02BB */
+	uint32_t framing_err; /* 02BC–02BF */
+
+	uint32_t tx_nopout_pdus; /* 02C0–02C3 */
+	uint32_t tx_scsi_cmd_pdus;  /* 02C4–02C7 */
+	uint32_t tx_tmf_cmd_pdus; /* 02C8–02CB */
+	uint32_t tx_login_cmd_pdus; /* 02CC–02CF */
+	uint32_t tx_text_cmd_pdus; /* 02D0–02D3 */
+	uint32_t tx_scsi_write_pdus; /* 02D4–02D7 */
+	uint32_t tx_logout_cmd_pdus; /* 02D8–02DB */
+	uint32_t tx_snack_req_pdus; /* 02DC–02DF */
+
+	uint32_t rx_nopin_pdus; /* 02E0–02E3 */
+	uint32_t rx_scsi_resp_pdus; /* 02E4–02E7 */
+	uint32_t rx_tmf_resp_pdus; /* 02E8–02EB */
+	uint32_t rx_login_resp_pdus; /* 02EC–02EF */
+	uint32_t rx_text_resp_pdus; /* 02F0–02F3 */
+	uint32_t rx_scsi_read_pdus; /* 02F4–02F7 */
+	uint32_t rx_logout_resp_pdus; /* 02F8–02FB */
+
+	uint32_t rx_r2t_pdus; /* 02FC–02FF */
+	uint32_t rx_async_pdus; /* 0300–0303 */
+	uint32_t rx_reject_pdus; /* 0304–0307 */
+
+	uint8_t reserved2[264]; /* 0x0308 - 0x040F */
+};
+
 #endif /*  _QLA4X_FW_H */