scsi: lpfc: Add cmf_info sysfs entry

Allow abbreviated cm framework status information to be obtained via sysfs.

Link: https://lore.kernel.org/r/[e-mail]
Co-developed-by: Justin Tee <[e-mail]>
Signed-off-by: Justin Tee <[e-mail]>
Signed-off-by: James Smart <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/lpfc/lpfc.h

···
 };
 
 #define LPFC_MAX_RXMONITOR_ENTRY	800
+#define LPFC_MAX_RXMONITOR_DUMP		32
 struct rxtable_entry {
 	uint64_t total_bytes;   /* Total no of read bytes requested */
 	uint64_t rcv_bytes;     /* Total no of read bytes completed */

drivers/scsi/lpfc/lpfc_attr.c

···
 #define LPFC_MIN_DEVLOSS_TMO	1
 #define LPFC_MAX_DEVLOSS_TMO	255
 
+#define LPFC_MAX_INFO_TMP_LEN	100
+#define LPFC_INFO_MORE_STR	"\nCould be more info...\n"
 /*
  * Write key size should be multiple of 4. If write key is changed
  * make sure that library write key is also changed.
···
 	}
 	hdw[8] = 0;
 	return;
+}
+
+static ssize_t
+lpfc_cmf_info_show(struct device *dev, struct device_attribute *attr,
+		   char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
+	struct lpfc_hba   *phba = vport->phba;
+	struct lpfc_cgn_info *cp = NULL;
+	struct lpfc_cgn_stat *cgs;
+	int  len = 0;
+	int cpu;
+	u64 rcv, total;
+	char tmp[LPFC_MAX_INFO_TMP_LEN] = {0};
+
+	if (phba->cgn_i)
+		cp = (struct lpfc_cgn_info *)phba->cgn_i->virt;
+
+	scnprintf(tmp, sizeof(tmp),
+		  "Congestion Mgmt Info: E2Eattr %d Ver %d "
+		  "CMF %d cnt %d\n",
+		  phba->sli4_hba.pc_sli4_params.mi_ver,
+		  cp ? cp->cgn_info_version : 0,
+		  phba->sli4_hba.pc_sli4_params.cmf, phba->cmf_timer_cnt);
+
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	if (!phba->sli4_hba.pc_sli4_params.cmf)
+		goto buffer_done;
+
+	switch (phba->cgn_init_reg_signal) {
+	case EDC_CG_SIG_WARN_ONLY:
+		scnprintf(tmp, sizeof(tmp),
+			  "Register: Init:  Signal:WARN  ");
+		break;
+	case EDC_CG_SIG_WARN_ALARM:
+		scnprintf(tmp, sizeof(tmp),
+			  "Register: Init:  Signal:WARN|ALARM  ");
+		break;
+	default:
+		scnprintf(tmp, sizeof(tmp),
+			  "Register: Init:  Signal:NONE  ");
+		break;
+	}
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	switch (phba->cgn_init_reg_fpin) {
+	case LPFC_CGN_FPIN_WARN:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:WARN\n");
+		break;
+	case LPFC_CGN_FPIN_ALARM:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:ALARM\n");
+		break;
+	case LPFC_CGN_FPIN_BOTH:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:WARN|ALARM\n");
+		break;
+	default:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:NONE\n");
+		break;
+	}
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	switch (phba->cgn_reg_signal) {
+	case EDC_CG_SIG_WARN_ONLY:
+		scnprintf(tmp, sizeof(tmp),
+			  "       Current:  Signal:WARN  ");
+		break;
+	case EDC_CG_SIG_WARN_ALARM:
+		scnprintf(tmp, sizeof(tmp),
+			  "       Current:  Signal:WARN|ALARM  ");
+		break;
+	default:
+		scnprintf(tmp, sizeof(tmp),
+			  "       Current:  Signal:NONE  ");
+		break;
+	}
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	switch (phba->cgn_reg_fpin) {
+	case LPFC_CGN_FPIN_WARN:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:WARN  ACQEcnt:%d\n", phba->cgn_acqe_cnt);
+		break;
+	case LPFC_CGN_FPIN_ALARM:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:ALARM  ACQEcnt:%d\n", phba->cgn_acqe_cnt);
+		break;
+	case LPFC_CGN_FPIN_BOTH:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:WARN|ALARM  ACQEcnt:%d\n", phba->cgn_acqe_cnt);
+		break;
+	default:
+		scnprintf(tmp, sizeof(tmp),
+			  "FPIN:NONE  ACQEcnt:%d\n", phba->cgn_acqe_cnt);
+		break;
+	}
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	if (phba->cmf_active_mode != phba->cgn_p.cgn_param_mode) {
+		switch (phba->cmf_active_mode) {
+		case LPFC_CFG_OFF:
+			scnprintf(tmp, sizeof(tmp), "Active: Mode:Off\n");
+			break;
+		case LPFC_CFG_MANAGED:
+			scnprintf(tmp, sizeof(tmp), "Active: Mode:Managed\n");
+			break;
+		case LPFC_CFG_MONITOR:
+			scnprintf(tmp, sizeof(tmp), "Active: Mode:Monitor\n");
+			break;
+		default:
+			scnprintf(tmp, sizeof(tmp), "Active: Mode:Unknown\n");
+		}
+		if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+			goto buffer_done;
+	}
+
+	switch (phba->cgn_p.cgn_param_mode) {
+	case LPFC_CFG_OFF:
+		scnprintf(tmp, sizeof(tmp), "Config: Mode:Off  ");
+		break;
+	case LPFC_CFG_MANAGED:
+		scnprintf(tmp, sizeof(tmp), "Config: Mode:Managed ");
+		break;
+	case LPFC_CFG_MONITOR:
+		scnprintf(tmp, sizeof(tmp), "Config: Mode:Monitor ");
+		break;
+	default:
+		scnprintf(tmp, sizeof(tmp), "Config: Mode:Unknown ");
+	}
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	total = 0;
+	rcv = 0;
+	for_each_present_cpu(cpu) {
+		cgs = per_cpu_ptr(phba->cmf_stat, cpu);
+		total += atomic64_read(&cgs->total_bytes);
+		rcv += atomic64_read(&cgs->rcv_bytes);
+	}
+
+	scnprintf(tmp, sizeof(tmp),
+		  "IObusy:%d Info:%d Bytes: Rcv:x%llx Total:x%llx\n",
+		  atomic_read(&phba->cmf_busy),
+		  phba->cmf_active_info, rcv, total);
+	if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
+		goto buffer_done;
+
+	scnprintf(tmp, sizeof(tmp),
+		  "Port_speed:%d  Link_byte_cnt:%ld  "
+		  "Max_byte_per_interval:%ld\n",
+		  lpfc_sli_port_speed_get(phba),
+		  (unsigned long)phba->cmf_link_byte_count,
+		  (unsigned long)phba->cmf_max_bytes_per_interval);
+	strlcat(buf, tmp, PAGE_SIZE);
+
+buffer_done:
+	len = strnlen(buf, PAGE_SIZE);
+
+	if (unlikely(len >= (PAGE_SIZE - 1))) {
+		lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
+				"6312 Catching potential buffer "
+				"overflow > PAGE_SIZE = %lu bytes\n",
+				PAGE_SIZE);
+		strscpy(buf + PAGE_SIZE - 1 -
+			strnlen(LPFC_INFO_MORE_STR, PAGE_SIZE - 1),
+			LPFC_INFO_MORE_STR,
+			strnlen(LPFC_INFO_MORE_STR, PAGE_SIZE - 1)
+			+ 1);
+	}
+	return len;
 }
 
 /**
···
 	char *statep;
 	int i;
 	int len = 0;
-	char tmp[LPFC_MAX_NVME_INFO_TMP_LEN] = {0};
+	char tmp[LPFC_MAX_INFO_TMP_LEN] = {0};
 
 	if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_NVME)) {
 		len = scnprintf(buf, PAGE_SIZE, "NVME Disabled\n");
···
 				"6314 Catching potential buffer "
 				"overflow > PAGE_SIZE = %lu bytes\n",
 				PAGE_SIZE);
-		strlcpy(buf + PAGE_SIZE - 1 - sizeof(LPFC_NVME_INFO_MORE_STR),
-			LPFC_NVME_INFO_MORE_STR,
-			sizeof(LPFC_NVME_INFO_MORE_STR) + 1);
+		strscpy(buf + PAGE_SIZE - 1 - sizeof(LPFC_INFO_MORE_STR),
+			LPFC_INFO_MORE_STR,
+			sizeof(LPFC_INFO_MORE_STR) + 1);
 	}
 
 	return len;
···
 static DEVICE_ATTR(protocol, S_IRUGO, lpfc_sli4_protocol_show, NULL);
 static DEVICE_ATTR(lpfc_xlane_supported, S_IRUGO, lpfc_oas_supported_show,
 		   NULL);
+static DEVICE_ATTR(cmf_info, 0444, lpfc_cmf_info_show, NULL);
 
 static char *lpfc_soft_wwn_key = "C99G71SL8032A";
 #define WWN_SZ 8
···
 	&dev_attr_lpfc_enable_bbcr,
 	&dev_attr_lpfc_enable_dpp,
 	&dev_attr_lpfc_enable_mi,
+	&dev_attr_cmf_info,
 	&dev_attr_lpfc_max_vmid,
 	&dev_attr_lpfc_vmid_inactivity_timeout,
 	&dev_attr_lpfc_vmid_app_header,
···
 	&dev_attr_lpfc_max_scsicmpl_time,
 	&dev_attr_lpfc_stat_data_ctrl,
 	&dev_attr_lpfc_static_vport,
+	&dev_attr_cmf_info,
 	NULL,
 };
 

drivers/scsi/lpfc/lpfc_crtn.h

···
 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_dump_rxmonitor(struct lpfc_hba *phba);
 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);
···
 int lpfc_issue_fabric_reglogin(struct lpfc_vport *);
 int lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry);
 int lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry);
+void lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length);
 int lpfc_els_free_iocb(struct lpfc_hba *, struct lpfc_iocbq *);
 int lpfc_ct_free_iocb(struct lpfc_hba *, struct lpfc_iocbq *);
 int lpfc_els_rsp_acc(struct lpfc_vport *, uint32_t, struct lpfc_iocbq *,

drivers/scsi/lpfc/lpfc_els.c

···
 	return rc;
 }
 
-static void
+void
 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
 {
 	struct lpfc_hba *phba = vport->phba;

drivers/scsi/lpfc/lpfc_hw4.h

···
 	void *addr[LPFC_SLI4_MBX_SGE_MAX_PAGES];
 };
 
+#define LPFC_MBX_OBJECT_NAME_LEN_DW	26
 struct lpfc_mbx_read_object {  /* Version 0 */
 	struct mbox_header header;
 	union {
···
 #define lpfc_mbx_rd_object_rlen_MASK	0x00FFFFFF
 #define lpfc_mbx_rd_object_rlen_WORD	word0
 			uint32_t rd_object_offset;
-			uint32_t rd_object_name[26];
+			uint32_t rd_object_name[LPFC_MBX_OBJECT_NAME_LEN_DW];
 #define LPFC_OBJ_NAME_SZ 104   /* 26 x sizeof(uint32_t) is 104. */
 			uint32_t rd_object_cnt;
 			struct lpfc_mbx_host_buf rd_object_hbuf[4];
···
 #define MB_CEQ_STATUS_QUEUE_FLUSHING		0x4
 #define MB_CQE_STATUS_DMA_FAILED		0x5
 
+
 #define LPFC_MBX_WR_CONFIG_MAX_BDE		1
 struct lpfc_mbx_wr_object {
 	struct mbox_header header;
···
 #define lpfc_wr_object_write_length_MASK	0x00FFFFFF
 #define lpfc_wr_object_write_length_WORD	word4
 			uint32_t write_offset;
-			uint32_t object_name[26];
+			uint32_t object_name[LPFC_MBX_OBJECT_NAME_LEN_DW];
 			uint32_t bde_count;
 			struct ulp_bde64 bde[LPFC_MBX_WR_CONFIG_MAX_BDE];
 		} request;

drivers/scsi/lpfc/lpfc_init.c

···
 	return port_speed;
 }
 
+void
+lpfc_cgn_dump_rxmonitor(struct lpfc_hba *phba)
+{
+	struct rxtable_entry *entry;
+	int cnt = 0, head, tail, last, start;
+
+	head = atomic_read(&phba->rxtable_idx_head);
+	tail = atomic_read(&phba->rxtable_idx_tail);
+	if (!phba->rxtable || head == tail) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_CGN_MGMT,
+				"4411 Rxtable is empty\n");
+		return;
+	}
+	last = tail;
+	start = head;
+
+	/* Display the last LPFC_MAX_RXMONITOR_DUMP entries from the rxtable */
+	while (start != last) {
+		if (start)
+			start--;
+		else
+			start = LPFC_MAX_RXMONITOR_ENTRY - 1;
+		entry = &phba->rxtable[start];
+		lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
+				"4410 %02d: MBPI %lld Xmit %lld Cmpl %lld "
+				"Lat %lld ASz %lld Info %02d BWUtil %d "
+				"Int %d slot %d\n",
+				cnt, entry->max_bytes_per_interval,
+				entry->total_bytes, entry->rcv_bytes,
+				entry->avg_io_latency, entry->avg_io_size,
+				entry->cmf_info, entry->timer_utilization,
+				entry->timer_interval, start);
+		cnt++;
+		if (cnt >= LPFC_MAX_RXMONITOR_DUMP)
+			return;
+	}
+}
+
 /**
  * lpfc_cgn_update_stat - Save data into congestion stats buffer
  * @phba: pointer to lpfc hba data structure.

drivers/scsi/lpfc/lpfc_nvme.h

···
 #define LPFC_NVME_FB_SHIFT		9
 #define LPFC_NVME_MAX_FB		(1 << 20)	/* 1M */
 
-#define LPFC_MAX_NVME_INFO_TMP_LEN	100
-#define LPFC_NVME_INFO_MORE_STR		"\nCould be more info...\n"
-
 #define lpfc_ndlp_get_nrport(ndlp)				\
 	((!ndlp->nrport || (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT))\
 	? NULL : ndlp->nrport)