Commit 874163aa authored by Shyam Sundar's avatar Shyam Sundar Committed by Martin K. Petersen
Browse files

scsi: fc: Update formal FPIN descriptor definitions 

Add Fabric Performance Impact Notification (FPIN) descriptor definitions
for the following FPINs:

 - Delivery Notification Descriptor

 - Peer Congestion Notification Descriptor

 - Congestion Notification Descriptor

Link: https://lore.kernel.org/r/20201021092715.22669-2-njavali@marvell.com


Reviewed-by: default avatarJames Smart <james.smart@broadcom.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarShyam Sundar <ssundar@marvell.com>
Signed-off-by: default avatarNilesh Javali <njavali@marvell.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 3650b228

include/uapi/scsi/fc/fc_els.h

+113 −1
Original line number Diff line number Diff line
@@ -916,7 +916,9 @@ enum fc_els_clid_ic { 
	ELS_CLID_IC_LIP =	8,	/* receiving LIP */

};





/*

 * Link Integrity event types

 */

enum fc_fpin_li_event_types {

	FPIN_LI_UNKNOWN =		0x0,

	FPIN_LI_LINK_FAILURE =		0x1,
@@ -943,6 +945,54 @@ enum fc_fpin_li_event_types { 
	{ FPIN_LI_DEVICE_SPEC,		"Device Specific" },		\

}



/*

 * Delivery event types

 */

enum fc_fpin_deli_event_types {

	FPIN_DELI_UNKNOWN =		0x0,

	FPIN_DELI_TIMEOUT =		0x1,

	FPIN_DELI_UNABLE_TO_ROUTE =	0x2,

	FPIN_DELI_DEVICE_SPEC =		0xF,

};



/*

 * Initializer useful for decoding table.

 * Please keep this in sync with the above definitions.

 */

#define FC_FPIN_DELI_EVT_TYPES_INIT {					\

	{ FPIN_DELI_UNKNOWN,		"Unknown" },			\

	{ FPIN_DELI_TIMEOUT,		"Timeout" },			\

	{ FPIN_DELI_UNABLE_TO_ROUTE,	"Unable to Route" },		\

	{ FPIN_DELI_DEVICE_SPEC,	"Device Specific" },		\

}



/*

 * Congestion event types

 */

enum fc_fpin_congn_event_types {

	FPIN_CONGN_CLEAR =		0x0,

	FPIN_CONGN_LOST_CREDIT =	0x1,

	FPIN_CONGN_CREDIT_STALL =	0x2,

	FPIN_CONGN_OVERSUBSCRIPTION =	0x3,

	FPIN_CONGN_DEVICE_SPEC =	0xF,

};



/*

 * Initializer useful for decoding table.

 * Please keep this in sync with the above definitions.

 */

#define FC_FPIN_CONGN_EVT_TYPES_INIT {					\

	{ FPIN_CONGN_CLEAR,		"Clear" },			\

	{ FPIN_CONGN_LOST_CREDIT,	"Lost Credit" },		\

	{ FPIN_CONGN_CREDIT_STALL,	"Credit Stall" },		\

	{ FPIN_CONGN_OVERSUBSCRIPTION,	"Oversubscription" },		\

	{ FPIN_CONGN_DEVICE_SPEC,	"Device Specific" },		\

}



enum fc_fpin_congn_severity_types {

	FPIN_CONGN_SEVERITY_WARNING =	0xF1,

	FPIN_CONGN_SEVERITY_ERROR =	0xF7,

};



/*

 * Link Integrity Notification Descriptor
@@ -974,6 +1024,68 @@ struct fc_fn_li_desc { 
					 */

};



/*

 * Delivery Notification Descriptor

 */

struct fc_fn_deli_desc {

	__be32		desc_tag;	/* Descriptor Tag (0x00020002) */

	__be32		desc_len;	/* Length of Descriptor (in bytes).

					 * Size of descriptor excluding

					 * desc_tag and desc_len fields.

					 */

	__be64		detecting_wwpn;	/* Port Name that detected event */

	__be64		attached_wwpn;	/* Port Name of device attached to

					 * detecting Port Name

					 */

	__be32		deli_reason_code;/* see enum fc_fpin_deli_event_types */

};



/*

 * Peer Congestion Notification Descriptor

 */

struct fc_fn_peer_congn_desc {

	__be32		desc_tag;	/* Descriptor Tag (0x00020003) */

	__be32		desc_len;	/* Length of Descriptor (in bytes).

					 * Size of descriptor excluding

					 * desc_tag and desc_len fields.

					 */

	__be64		detecting_wwpn;	/* Port Name that detected event */

	__be64		attached_wwpn;	/* Port Name of device attached to

					 * detecting Port Name

					 */

	__be16		event_type;	/* see enum fc_fpin_congn_event_types */

	__be16		event_modifier;	/* Implementation specific value

					 * describing the event type

					 */

	__be32		event_period;	/* duration (ms) of the detected

					 * congestion event

					 */

	__be32		pname_count;	/* number of portname_list elements */

	__be64		pname_list[0];	/* list of N_Port_Names accessible

					 * through the attached port

					 */

};



/*

 * Congestion Notification Descriptor

 */

struct fc_fn_congn_desc {

	__be32		desc_tag;	/* Descriptor Tag (0x00020004) */

	__be32		desc_len;	/* Length of Descriptor (in bytes).

					 * Size of descriptor excluding

					 * desc_tag and desc_len fields.

					 */

	__be16		event_type;	/* see enum fc_fpin_congn_event_types */

	__be16		event_modifier;	/* Implementation specific value

					 * describing the event type

					 */

	__be32		event_period;	/* duration (ms) of the detected

					 * congestion event

					 */

	__u8		severity;	/* command */

	__u8		resv[3];	/* reserved - must be zero */

};



/*

 * ELS_FPIN - Fabric Performance Impact Notification

 */