Commit 54404d35 authored by James Smart's avatar James Smart Committed by Martin K. Petersen
Browse files

scsi: fc: Add EDC ELS definition 

Add Exchange Diagnostic Capabilities (EDC) ELS definition and the following
capability descriptors:

 - Link Fault Capability Descriptor

 - Congestion Signaling Capability Descriptor

Definitions taken from FC-LS-5 r5.01

Link: https://lore.kernel.org/r/20210816162901.121235-2-jsmart2021@gmail.com


Signed-off-by: default avatarJames Smart <jsmart2021@gmail.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 922ad26e

include/uapi/scsi/fc/fc_els.h

+106 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ enum fc_els_cmd { 
	ELS_REC =	0x13,	/* read exchange concise */

	ELS_SRR =	0x14,	/* sequence retransmission request */

	ELS_FPIN =	0x16,	/* Fabric Performance Impact Notification */

	ELS_EDC =	0x17,	/* Exchange Diagnostic Capabilities */

	ELS_RDP =	0x18,	/* Read Diagnostic Parameters */

	ELS_RDF =	0x19,	/* Register Diagnostic Functions */

	ELS_PRLI =	0x20,	/* process login */
@@ -111,6 +112,7 @@ enum fc_els_cmd { 
	[ELS_REC] =	"REC",			\

	[ELS_SRR] =	"SRR",			\

	[ELS_FPIN] =	"FPIN",			\

	[ELS_EDC] =	"EDC",			\

	[ELS_RDP] =	"RDP",			\

	[ELS_RDF] =	"RDF",			\

	[ELS_PRLI] =	"PRLI",			\
@@ -218,6 +220,10 @@ enum fc_els_rjt_explan { 
enum fc_ls_tlv_dtag {

	ELS_DTAG_LS_REQ_INFO =		0x00000001,

		/* Link Service Request Information Descriptor */

	ELS_DTAG_LNK_FAULT_CAP =	0x0001000D,

		/* Link Fault Capability Descriptor */

	ELS_DTAG_CG_SIGNAL_CAP =	0x0001000F,

		/* Congestion Signaling Capability Descriptor */

	ELS_DTAG_LNK_INTEGRITY =	0x00020001,

		/* Link Integrity Notification Descriptor */

	ELS_DTAG_DELIVERY =		0x00020002,
@@ -236,6 +242,8 @@ enum fc_ls_tlv_dtag { 
 */

#define FC_LS_TLV_DTAG_INIT {					      \

	{ ELS_DTAG_LS_REQ_INFO,		"Link Service Request Information" }, \

	{ ELS_DTAG_LNK_FAULT_CAP,	"Link Fault Capability" },	      \

	{ ELS_DTAG_CG_SIGNAL_CAP,	"Congestion Signaling Capability" },  \

	{ ELS_DTAG_LNK_INTEGRITY,	"Link Integrity Notification" },      \

	{ ELS_DTAG_DELIVERY,		"Delivery Notification Present" },    \

	{ ELS_DTAG_PEER_CONGEST,	"Peer Congestion Notification" },     \
@@ -1144,4 +1152,102 @@ struct fc_els_rdf_resp { 
};





/*

 * Diagnostic Capability Descriptors for EDC ELS

 */



/*

 * Diagnostic: Link Fault Capability Descriptor

 */

struct fc_diag_lnkflt_desc {

	__be32		desc_tag;	/* Descriptor Tag (0x0001000D) */

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

					 * Size of descriptor excluding

					 * desc_tag and desc_len fields.

					 * 12 bytes

					 */

	__be32		degrade_activate_threshold;

	__be32		degrade_deactivate_threshold;

	__be32		fec_degrade_interval;

};



enum fc_edc_cg_signal_cap_types {

	/* Note: Capability: bits 31:4 Rsvd; bits 3:0 are capabilities */

	EDC_CG_SIG_NOTSUPPORTED =	0x00, /* neither supported */

	EDC_CG_SIG_WARN_ONLY =		0x01,

	EDC_CG_SIG_WARN_ALARM =		0x02, /* both supported */

};



/*

 * Initializer useful for decoding table.

 * Please keep this in sync with the above definitions.

 */

#define FC_EDC_CG_SIGNAL_CAP_TYPES_INIT {				\

	{ EDC_CG_SIG_NOTSUPPORTED,	"Signaling Not Supported" },	\

	{ EDC_CG_SIG_WARN_ONLY,		"Warning Signal" },		\

	{ EDC_CG_SIG_WARN_ALARM,	"Warning and Alarm Signals" },	\

}



enum fc_diag_cg_sig_freq_types {

	EDC_CG_SIGFREQ_CNT_MIN =	1,	/* Min Frequency Count */

	EDC_CG_SIGFREQ_CNT_MAX =	999,	/* Max Frequency Count */



	EDC_CG_SIGFREQ_SEC =		0x1,	/* Units: seconds */

	EDC_CG_SIGFREQ_MSEC =		0x2,	/* Units: milliseconds */

};



struct fc_diag_cg_sig_freq {

	__be16		count;		/* Time between signals

					 * note: upper 6 bits rsvd

					 */

	__be16		units;		/* Time unit for count

					 * note: upper 12 bits rsvd

					 */

};



/*

 * Diagnostic: Congestion Signaling Capability Descriptor

 */

struct fc_diag_cg_sig_desc {

	__be32		desc_tag;	/* Descriptor Tag (0x0001000F) */

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

					 * Size of descriptor excluding

					 * desc_tag and desc_len fields.

					 * 16 bytes

					 */

	__be32				xmt_signal_capability;

	struct fc_diag_cg_sig_freq	xmt_signal_frequency;

	__be32				rcv_signal_capability;

	struct fc_diag_cg_sig_freq	rcv_signal_frequency;

};



/*

 * ELS_EDC - Exchange Diagnostic Capabilities

 */

struct fc_els_edc {

	__u8		edc_cmd;	/* command (0x17) */

	__u8		edc_zero[3];	/* specified as zero - part of cmd */

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

					 * Size of ELS excluding edc_cmd,

					 * edc_zero and desc_len fields.

					 */

	struct fc_tlv_desc	desc[0];

					/* Diagnostic Descriptor list */

};



/*

 * ELS EDC LS_ACC Response.

 */

struct fc_els_edc_resp {

	struct fc_els_ls_acc	acc_hdr;

	__be32			desc_list_len;	/* Length of response (in

						 * bytes). Excludes acc_hdr

						 * and desc_list_len fields.

						 */

	struct fc_els_lsri_desc	lsri;

	struct fc_tlv_desc	desc[0];

				    /* Supported Diagnostic Descriptor list */

};





#endif /* _FC_ELS_H_ */