scsi: lpfc: Add support for maintaining the cm statistics buffer

Add the logic to move the congestion management and event information into
the cmd statistics buffer maintained for the adapter.  The update includes
rolling up values for the last minute, hour, and day information.

Link: https://lore.kernel.org/r/20210816162901.121235-12-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_crtn.h

@@ -83,8 +83,10 @@ void lpfc_cmf_stop(struct lpfc_hba *phba);
 void lpfc_init_congestion_stat(struct lpfc_hba *phba);
 void lpfc_init_congestion_buf(struct lpfc_hba *phba);
 int lpfc_sli4_cgn_params_read(struct lpfc_hba *phba);
+uint32_t lpfc_cgn_calc_crc32(void *bufp, uint32_t sz, uint32_t seed);
 int lpfc_config_cgn_signal(struct lpfc_hba *phba);
 int lpfc_issue_cmf_sync_wqe(struct lpfc_hba *phba, u32 ms, u64 total);
+void lpfc_cgn_update_stat(struct lpfc_hba *phba, uint32_t dtag);
 void lpfc_unblock_requests(struct lpfc_hba *phba);
 void lpfc_block_requests(struct lpfc_hba *phba);
 

drivers/scsi/lpfc/lpfc_els.c

@@ -3783,6 +3783,7 @@ lpfc_least_capable_settings(struct lpfc_hba *phba,
 	u32 rsp_sig_cap = 0, drv_sig_cap = 0;
 	u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
 	struct lpfc_cgn_info *cp;
+	u32 crc;
 	u16 sig_freq;
 
 	/* Get rsp signal and frequency capabilities.  */
@@ -3856,6 +3857,8 @@ lpfc_least_capable_settings(struct lpfc_hba *phba,
 		cp->cgn_alarm_freq = cpu_to_le16(sig_freq);
 		cp->cgn_warn_freq = cpu_to_le16(sig_freq);
 	}
+	crc = lpfc_cgn_calc_crc32(cp, LPFC_CGN_INFO_SZ, LPFC_CGN_CRC32_SEED);
+	cp->cgn_info_crc = cpu_to_le32(crc);
 	return;
 
 out_no_support:
@@ -9539,6 +9542,7 @@ lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
 	const char *cgn_sev_str;
 	u32 cgn_sev;
 	uint16_t value;
+	u32 crc;
 	bool nm_log = false;
 	int rc = 1;
 
@@ -9601,6 +9605,11 @@ lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
 						LPFC_CGN_FPIN_WARN)
 						cp->cgn_warn_freq =
 							cpu_to_le16(value);
+					crc = lpfc_cgn_calc_crc32
+						(cp,
+						LPFC_CGN_INFO_SZ,
+						LPFC_CGN_CRC32_SEED);
+					cp->cgn_info_crc = cpu_to_le32(crc);
 				}
 
 				/* Don't deliver to upper layer since
@@ -9688,6 +9697,7 @@ lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
 			/* If descriptor is bad, drop the rest of the data */
 			return;
 		}
+		lpfc_cgn_update_stat(phba, dtag);
 		cnt = be32_to_cpu(tlv->desc_len);
 
 		/* Sanity check descriptor length. The desc_len value does not