On Fri, 2019-04-05 at 16:04 -0700, James Smart wrote:
> T11 has introduced a new Fabric Notifications mechanism whereby the
> fabric can notify a port of events occurring in the fabric.
> The notifications are given by the FPIN ELS.
>
> Add the FPIN ELS definitions to the kernel.
>
> Signed-off-by: James Smart <jsmart2021@xxxxxxxxx>
> ---
> include/uapi/scsi/fc/fc_els.h | 33 +++++++++++++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
>
> diff --git a/include/uapi/scsi/fc/fc_els.h b/include/uapi/scsi/fc/fc_els.h
> index b7e0a5ed40de..a81c53508cc6 100644
> --- a/include/uapi/scsi/fc/fc_els.h
> +++ b/include/uapi/scsi/fc/fc_els.h
> @@ -52,6 +52,7 @@ enum fc_els_cmd {
> ELS_RRQ = 0x12, /* reinstate recovery qualifier */
> ELS_REC = 0x13, /* read exchange concise */
> ELS_SRR = 0x14, /* sequence retransmission request */
> + ELS_FPIN = 0x16, /* Fabric Performance Impact Notification */
> ELS_PRLI = 0x20, /* process login */
> ELS_PRLO = 0x21, /* process logout */
> ELS_SCN = 0x22, /* state change notification */
> @@ -119,6 +120,7 @@ enum fc_els_cmd {
> [ELS_RRQ] = "RRQ", \
> [ELS_REC] = "REC", \
> [ELS_SRR] = "SRR", \
> + [ELS_FPIN] = "FPIN", \
> [ELS_PRLI] = "PRLI", \
> [ELS_PRLO] = "PRLO", \
> [ELS_SCN] = "SCN", \
> @@ -829,4 +831,35 @@ enum fc_els_clid_ic {
> ELS_CLID_IC_LIP = 8, /* receiving LIP */
> };
>
> +
> +/*
> + * Fabric Notification Descriptor Tag values
> + */
> +enum fc_fn_dtag {
> + ELS_FN_DTAG_LNK_INTEGRITY = 0x00020001, /* Link Integrity */
> + ELS_FN_DTAG_PEER_CONGEST = 0x00020003, /* Peer Congestion */
> + ELS_FN_DTAG_CONGESTION = 0x00020004, /* Congestion */
> +};
> +
> +/*
> + * Fabric Notification Descriptor
> + */
> +struct fc_fn_desc {
> + __be32 fn_desc_tag; /* Notification Descriptor Tag */
> + __be32 fn_desc_value_len; /* Length of Descriptor Value field
> + * (in bytes)
> + */
> + __u8 fn_desc_value[0]; /* Descriptor Value */
> +};
> +
> +/*
> + * ELS_FPIN - Fabric Performance Impact Notification
> + */
> +struct fc_els_fpin {
> + __u8 fpin_cmd; /* command (0x16) */
> + __u8 fpin_zero[3]; /* specified as zero - part of cmd */
> + __be32 fpin_desc_cnt; /* count of descriptors */
> + struct fc_fn_desc fpin_desc[0]; /* Descriptor list */
> +};
> +
> #endif /* _FC_ELS_H_ */
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
