[SCSI] qla2xxx: add support for NPIV

Following patch adds support for NPIV (N-Port ID Virtualization) to the
qla2xxx.

- supported within switched-fabric topologies only.
- supports up to 63 virtual ports on each physical port.

Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla2xxx/Makefile

@@ -1,4 +1,4 @@
 qla2xxx-y := qla_os.o qla_init.o qla_mbx.o qla_iocb.o qla_isr.o qla_gs.o \
-		qla_dbg.o qla_sup.o qla_attr.o
+		qla_dbg.o qla_sup.o qla_attr.o qla_mid.o
 
 obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx.o

drivers/scsi/qla2xxx/qla_attr.c

@@ -6,8 +6,11 @@
  */
 #include "qla_def.h"
 
+#include <linux/kthread.h>
 #include <linux/vmalloc.h>
 
+int qla24xx_vport_disable(struct fc_vport *, bool);
+
 /* SYSFS attributes --------------------------------------------------------- */
 
 static ssize_t
@@ -959,6 +962,122 @@ qla2x00_get_host_port_state(struct Scsi_Host *shost)
 		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
 }
 
+static int
+qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
+{
+	int	ret = 0;
+	scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
+	scsi_qla_host_t *vha;
+
+	ret = qla24xx_vport_create_req_sanity_check(fc_vport);
+	if (ret) {
+		DEBUG15(printk("qla24xx_vport_create_req_sanity_check failed, "
+		    "status %x\n", ret));
+		return (ret);
+	}
+
+	vha = qla24xx_create_vhost(fc_vport);
+	if (vha == NULL) {
+		DEBUG15(printk ("qla24xx_create_vhost failed, vha = %p\n",
+		    vha));
+		return FC_VPORT_FAILED;
+	}
+	if (disable) {
+		atomic_set(&vha->vp_state, VP_OFFLINE);
+		fc_vport_set_state(fc_vport, FC_VPORT_DISABLED);
+	} else
+		atomic_set(&vha->vp_state, VP_FAILED);
+
+	/* ready to create vport */
+	qla_printk(KERN_INFO, vha, "VP entry id %d assigned.\n", vha->vp_idx);
+
+	/* initialized vport states */
+	atomic_set(&vha->loop_state, LOOP_DOWN);
+	vha->vp_err_state=  VP_ERR_PORTDWN;
+	vha->vp_prev_err_state=  VP_ERR_UNKWN;
+	/* Check if physical ha port is Up */
+	if (atomic_read(&ha->loop_state) == LOOP_DOWN ||
+	    atomic_read(&ha->loop_state) == LOOP_DEAD) {
+		/* Don't retry or attempt login of this virtual port */
+		DEBUG15(printk ("scsi(%ld): pport loop_state is not UP.\n",
+		    vha->host_no));
+		atomic_set(&vha->loop_state, LOOP_DEAD);
+		if (!disable)
+			fc_vport_set_state(fc_vport, FC_VPORT_LINKDOWN);
+	}
+
+	if (scsi_add_host(vha->host, &fc_vport->dev)) {
+		DEBUG15(printk("scsi(%ld): scsi_add_host failure for VP[%d].\n",
+			vha->host_no, vha->vp_idx));
+		goto vport_create_failed_2;
+	}
+
+	/* initialize attributes */
+	fc_host_node_name(vha->host) = wwn_to_u64(vha->node_name);
+	fc_host_port_name(vha->host) = wwn_to_u64(vha->port_name);
+	fc_host_supported_classes(vha->host) =
+		fc_host_supported_classes(ha->host);
+	fc_host_supported_speeds(vha->host) =
+		fc_host_supported_speeds(ha->host);
+
+	qla24xx_vport_disable(fc_vport, disable);
+
+	return 0;
+vport_create_failed_2:
+	qla24xx_disable_vp(vha);
+	qla24xx_deallocate_vp_id(vha);
+	kfree(vha->port_name);
+	kfree(vha->node_name);
+	scsi_host_put(vha->host);
+	return FC_VPORT_FAILED;
+}
+
+int
+qla24xx_vport_delete(struct fc_vport *fc_vport)
+{
+	scsi_qla_host_t *ha = (scsi_qla_host_t *) fc_vport->shost->hostdata;
+	scsi_qla_host_t *vha = fc_vport->dd_data;
+
+	qla24xx_disable_vp(vha);
+	qla24xx_deallocate_vp_id(vha);
+
+	down(&ha->vport_sem);
+	ha->cur_vport_count--;
+	clear_bit(vha->vp_idx, (unsigned long *)ha->vp_idx_map);
+	up(&ha->vport_sem);
+
+	kfree(vha->node_name);
+	kfree(vha->port_name);
+
+	if (vha->timer_active) {
+		qla2x00_vp_stop_timer(vha);
+		DEBUG15(printk ("scsi(%ld): timer for the vport[%d] = %p "
+		    "has stopped\n",
+		    vha->host_no, vha->vp_idx, vha));
+        }
+
+	fc_remove_host(vha->host);
+
+	scsi_remove_host(vha->host);
+
+	scsi_host_put(vha->host);
+
+	return 0;
+}
+
+int
+qla24xx_vport_disable(struct fc_vport *fc_vport, bool disable)
+{
+	scsi_qla_host_t *vha = fc_vport->dd_data;
+
+	if (disable)
+		qla24xx_disable_vp(vha);
+	else
+		qla24xx_enable_vp(vha);
+
+	return 0;
+}
+
 struct fc_function_template qla2xxx_transport_functions = {
 
 	.show_host_node_name = 1,
@@ -996,6 +1115,49 @@ struct fc_function_template qla2xxx_transport_functions = {
 
 	.issue_fc_host_lip = qla2x00_issue_lip,
 	.get_fc_host_stats = qla2x00_get_fc_host_stats,
+
+	.vport_create = qla24xx_vport_create,
+	.vport_disable = qla24xx_vport_disable,
+	.vport_delete = qla24xx_vport_delete,
+};
+
+struct fc_function_template qla2xxx_transport_vport_functions = {
+
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+
+	.get_host_port_id = qla2x00_get_host_port_id,
+	.show_host_port_id = 1,
+	.get_host_speed = qla2x00_get_host_speed,
+	.show_host_speed = 1,
+	.get_host_port_type = qla2x00_get_host_port_type,
+	.show_host_port_type = 1,
+	.get_host_symbolic_name = qla2x00_get_host_symbolic_name,
+	.show_host_symbolic_name = 1,
+	.set_host_system_hostname = qla2x00_set_host_system_hostname,
+	.show_host_system_hostname = 1,
+	.get_host_fabric_name = qla2x00_get_host_fabric_name,
+	.show_host_fabric_name = 1,
+	.get_host_port_state = qla2x00_get_host_port_state,
+	.show_host_port_state = 1,
+
+	.dd_fcrport_size = sizeof(struct fc_port *),
+	.show_rport_supported_classes = 1,
+
+	.get_starget_node_name = qla2x00_get_starget_node_name,
+	.show_starget_node_name = 1,
+	.get_starget_port_name = qla2x00_get_starget_port_name,
+	.show_starget_port_name = 1,
+	.get_starget_port_id  = qla2x00_get_starget_port_id,
+	.show_starget_port_id = 1,
+
+	.get_rport_dev_loss_tmo = qla2x00_get_rport_loss_tmo,
+	.set_rport_dev_loss_tmo = qla2x00_set_rport_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+
+	.issue_fc_host_lip = qla2x00_issue_lip,
+	.get_fc_host_stats = qla2x00_get_fc_host_stats,
 };
 
 void
@@ -1004,4 +1166,6 @@ qla2x00_init_host_attr(scsi_qla_host_t *ha)
 	fc_host_node_name(ha->host) = wwn_to_u64(ha->node_name);
 	fc_host_port_name(ha->host) = wwn_to_u64(ha->port_name);
 	fc_host_supported_classes(ha->host) = FC_COS_CLASS3;
+	fc_host_max_npiv_vports(ha->host) = MAX_NUM_VPORT_FABRIC;
+	fc_host_npiv_vports_inuse(ha->host) = ha->cur_vport_count;
 }

drivers/scsi/qla2xxx/qla_dbg.h

@@ -21,6 +21,7 @@
 /* #define QL_DEBUG_LEVEL_12 */ /* Output IP trace msgs */
 /* #define QL_DEBUG_LEVEL_13 */ /* Output fdmi function trace msgs */
 /* #define QL_DEBUG_LEVEL_14 */ /* Output RSCN trace msgs */
+/* #define QL_DEBUG_LEVEL_15 */ /* Output NPIV trace msgs */
 /*
  *  Local Macro Definitions.
  */
@@ -30,7 +31,8 @@
     defined(QL_DEBUG_LEVEL_7)  || defined(QL_DEBUG_LEVEL_8) || \
     defined(QL_DEBUG_LEVEL_9)  || defined(QL_DEBUG_LEVEL_10) || \
     defined(QL_DEBUG_LEVEL_11) || defined(QL_DEBUG_LEVEL_12) || \
-    defined(QL_DEBUG_LEVEL_13) || defined(QL_DEBUG_LEVEL_14)
+    defined(QL_DEBUG_LEVEL_13) || defined(QL_DEBUG_LEVEL_14) || \
+    defined(QL_DEBUG_LEVEL_15)
     #define QL_DEBUG_ROUTINES
 #endif
 
@@ -125,6 +127,12 @@
 #define DEBUG14(x)	do {} while (0)
 #endif
 
+#if defined(QL_DEBUG_LEVEL_15)
+#define DEBUG15(x)      do {x;} while (0)
+#else
+#define DEBUG15(x)	do {} while (0)
+#endif
+
 /*
  * Firmware Dump structure definition
  */

drivers/scsi/qla2xxx/qla_def.h

@@ -1551,6 +1551,9 @@ typedef struct fc_port {
 
 	unsigned long last_queue_full;
 	unsigned long last_ramp_up;
+
+	struct list_head vp_fcport;
+	uint16_t vp_idx;
 } fc_port_t;
 
 /*
@@ -1999,6 +2002,36 @@ struct gid_list_info {
 };
 #define GID_LIST_SIZE (sizeof(struct gid_list_info) * MAX_FIBRE_DEVICES)
 
+/* NPIV */
+typedef struct vport_info {
+	uint8_t		port_name[WWN_SIZE];
+	uint8_t		node_name[WWN_SIZE];
+	int		vp_id;
+	uint16_t	loop_id;
+	unsigned long	host_no;
+	uint8_t		port_id[3];
+	int		loop_state;
+} vport_info_t;
+
+typedef struct vport_params {
+	uint8_t 	port_name[WWN_SIZE];
+	uint8_t 	node_name[WWN_SIZE];
+	uint32_t 	options;
+#define	VP_OPTS_RETRY_ENABLE	BIT_0
+#define	VP_OPTS_VP_DISABLE	BIT_1
+} vport_params_t;
+
+/* NPIV - return codes of VP create and modify */
+#define VP_RET_CODE_OK			0
+#define VP_RET_CODE_FATAL		1
+#define VP_RET_CODE_WRONG_ID		2
+#define VP_RET_CODE_WWPN		3
+#define VP_RET_CODE_RESOURCES		4
+#define VP_RET_CODE_NO_MEM		5
+#define VP_RET_CODE_NOT_FOUND		6
+
+#define to_qla_parent(x) (((x)->parent) ? (x)->parent : (x))
+
 /*
  * ISP operations
  */
@@ -2073,6 +2106,16 @@ struct qla_msix_entry {
 	uint16_t msix_entry;
 };
 
+#define	WATCH_INTERVAL		1       /* number of seconds */
+
+/* NPIV */
+#define MAX_MULTI_ID_LOOP                     126
+#define MAX_MULTI_ID_FABRIC                    64
+#define MAX_NUM_VPORT_LOOP                      (MAX_MULTI_ID_LOOP - 1)
+#define MAX_NUM_VPORT_FABRIC                    (MAX_MULTI_ID_FABRIC - 1)
+#define MAX_NUM_VHBA_LOOP                       (MAX_MULTI_ID_LOOP - 1)
+#define MAX_NUM_VHBA_FABRIC                     (MAX_MULTI_ID_FABRIC - 1)
+
 /*
  * Linux Host Adapter structure
  */
@@ -2108,6 +2151,8 @@ typedef struct scsi_qla_host {
 		uint32_t	msix_enabled		:1;
 		uint32_t	disable_serdes		:1;
 		uint32_t	gpsc_supported		:1;
+		uint32_t        vsan_enabled            :1;
+		uint32_t	npiv_supported		:1;
 	} flags;
 
 	atomic_t	loop_state;
@@ -2147,6 +2192,7 @@ typedef struct scsi_qla_host {
 #define BEACON_BLINK_NEEDED	25
 #define REGISTER_FDMI_NEEDED	26
 #define FCPORT_UPDATE_NEEDED	27
+#define VP_DPC_NEEDED		28	/* wake up for VP dpc handling */
 
 	uint32_t	device_flags;
 #define DFLG_LOCAL_DEVICES		BIT_0
@@ -2237,6 +2283,11 @@ typedef struct scsi_qla_host {
 
 	/* ISP configuration data. */
 	uint16_t	loop_id;		/* Host adapter loop id */
+	uint16_t	switch_cap;
+#define FLOGI_SEQ_DEL		BIT_8
+#define FLOGI_MID_SUPPORT	BIT_10
+#define FLOGI_VSAN_SUPPORT	BIT_12
+#define FLOGI_SP_SUPPORT	BIT_13
 	uint16_t	fb_rev;
 
 	port_id_t	d_id;			/* Host adapter port id */
@@ -2344,6 +2395,7 @@ typedef struct scsi_qla_host {
 #define MBX_UPDATE_FLASH_ACTIVE	3
 
 	struct semaphore mbx_cmd_sem;	/* Serialialize mbx access */
+	struct semaphore vport_sem;	/* Virtual port synchronization */
 	struct semaphore mbx_intr_sem;  /* Used for completion notification */
 
 	uint32_t	mbx_flags;
@@ -2428,6 +2480,37 @@ typedef struct scsi_qla_host {
 	struct fc_host_statistics fc_host_stat;
 
 	struct qla_msix_entry msix_entries[QLA_MSIX_ENTRIES];
+
+	struct list_head	vp_list;	/* list of VP */
+	struct fc_vport	*fc_vport;	/* holds fc_vport * for each vport */
+	uint8_t		vp_idx_map[16];
+	uint16_t        num_vhosts;	/* number of vports created */
+	uint16_t        num_vsans;	/* number of vsan created */
+	uint16_t        vp_idx;		/* vport ID */
+
+	struct scsi_qla_host	*parent;	/* holds pport */
+	unsigned long		vp_flags;
+	struct list_head	vp_fcports;	/* list of fcports */
+#define VP_IDX_ACQUIRED		0	/* bit no 0 */
+#define VP_CREATE_NEEDED	1
+#define VP_BIND_NEEDED		2
+#define VP_DELETE_NEEDED	3
+#define VP_SCR_NEEDED		4	/* State Change Request registration */
+	atomic_t 		vp_state;
+#define VP_OFFLINE		0
+#define VP_ACTIVE		1
+#define VP_FAILED		2
+// #define VP_DISABLE		3
+	uint16_t 	vp_err_state;
+	uint16_t	vp_prev_err_state;
+#define VP_ERR_UNKWN		0
+#define VP_ERR_PORTDWN		1
+#define VP_ERR_FAB_UNSUPPORTED	2
+#define VP_ERR_FAB_NORESOURCES	3
+#define VP_ERR_FAB_LOGOUT	4
+#define VP_ERR_ADAP_NORESOURCES	5
+	int		max_npiv_vports;	/* 63 or 125 per topoloty */
+	int		cur_vport_count;
 } scsi_qla_host_t;