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scsi: fc: Add EDC ELS definition

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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: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2021-08-16 09:28:46 -07:00 committed by Martin K. Petersen
parent 922ad26ebe
commit 54404d3572
1 changed files with 106 additions and 0 deletions
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106
include/uapi/scsi/fc/fc_els.h
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@ -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_ */