scsi: lpfc: Add capability to register Platform Name ID to fabric

FC-LS and FC-GS specifications outline fields for registering a platform
name identifier (PNI) to the fabric.  The PNI assists fabrics with
identifying the physical server source of frames in the fabric.

lpfc generates a PNI based partially on the uuid specific for the
system.  Initial attempts to extract a uuid are made from SMBIOS's
System Information 08h uuid entry.  If SMBIOS DMI does not exist, a PNI
is not generated and PNI registration with the fabric is skipped.

The PNI is submitted in FLOGI and FDISC frames.  After successful fabric
login, the RSPNI_PNI CT frame is submitted to the fabric to register the
OS host name tying it to the PNI.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://patch.msgid.link/20251106224639.139176-10-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

7 files changed, 150 insertions, 8 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 8459cf568c12..689793d03c20 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -633,6 +633,7 @@ struct lpfc_vport {
 #define FC_CT_RSPN_ID		0x8	 /* RSPN_ID accepted by switch */
 #define FC_CT_RFT_ID		0x10	 /* RFT_ID accepted by switch */
 #define FC_CT_RPRT_DEFER	0x20	 /* Defer issuing FDMI RPRT */
+#define FC_CT_RSPNI_PNI		0x40	 /* RSPNI_PNI accepted by switch */
 
 	struct list_head fc_nodes;
 	spinlock_t fc_nodes_list_lock; /* spinlock for fc_nodes list */
@@ -1077,6 +1078,8 @@ struct lpfc_hba {
 
 	uint32_t nport_event_cnt;	/* timestamp for nlplist entry */
 
+	unsigned long pni;		/* 64-bit Platform Name Identifier */
+
 	uint8_t  wwnn[8];
 	uint8_t  wwpn[8];
 	uint32_t RandomData[7];
diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index f93f8dca65bd..d3caac394291 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -1743,6 +1743,28 @@ lpfc_cmpl_ct_cmd_rsnn_nn(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 }
 
 static void
+lpfc_cmpl_ct_cmd_rspni_pni(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+			   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport;
+	struct lpfc_dmabuf *outp;
+	struct lpfc_sli_ct_request *ctrsp;
+	u32 ulp_status;
+
+	vport = cmdiocb->vport;
+	ulp_status = get_job_ulpstatus(phba, rspiocb);
+
+	if (ulp_status == IOSTAT_SUCCESS) {
+		outp = cmdiocb->rsp_dmabuf;
+		ctrsp = (struct lpfc_sli_ct_request *)outp->virt;
+		if (be16_to_cpu(ctrsp->CommandResponse.bits.CmdRsp) ==
+		    SLI_CT_RESPONSE_FS_ACC)
+			vport->ct_flags |= FC_CT_RSPNI_PNI;
+	}
+	lpfc_cmpl_ct(phba, cmdiocb, rspiocb);
+}
+
+static void
 lpfc_cmpl_ct_cmd_da_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
  struct lpfc_iocbq *rspiocb)
 {
@@ -1956,6 +1978,8 @@ lpfc_ns_cmd(struct lpfc_vport *vport, int cmdcode,
 		bpl->tus.f.bdeSize = RSPN_REQUEST_SZ;
 	else if (cmdcode == SLI_CTNS_RSNN_NN)
 		bpl->tus.f.bdeSize = RSNN_REQUEST_SZ;
+	else if (cmdcode == SLI_CTNS_RSPNI_PNI)
+		bpl->tus.f.bdeSize = RSPNI_REQUEST_SZ;
 	else if (cmdcode == SLI_CTNS_DA_ID)
 		bpl->tus.f.bdeSize = DA_ID_REQUEST_SZ;
 	else if (cmdcode == SLI_CTNS_RFF_ID)
@@ -2077,6 +2101,18 @@ lpfc_ns_cmd(struct lpfc_vport *vport, int cmdcode,
 			CtReq->un.rsnn.symbname, size);
 		cmpl = lpfc_cmpl_ct_cmd_rsnn_nn;
 		break;
+	case SLI_CTNS_RSPNI_PNI:
+		vport->ct_flags &= ~FC_CT_RSPNI_PNI;
+		CtReq->CommandResponse.bits.CmdRsp =
+		    cpu_to_be16(SLI_CTNS_RSPNI_PNI);
+		CtReq->un.rspni.pni = cpu_to_be64(phba->pni);
+		scnprintf(CtReq->un.rspni.symbname,
+			  sizeof(CtReq->un.rspni.symbname), "OS Host Name::%s",
+			  phba->os_host_name);
+		CtReq->un.rspni.len = strnlen(CtReq->un.rspni.symbname,
+					      sizeof(CtReq->un.rspni.symbname));
+		cmpl = lpfc_cmpl_ct_cmd_rspni_pni;
+		break;
 	case SLI_CTNS_DA_ID:
 		/* Implement DA_ID Nameserver request */
 		CtReq->CommandResponse.bits.CmdRsp =
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index b066ba83ce87..02b6d31b9ad9 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -650,8 +650,6 @@ lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		ndlp->nlp_class_sup |= FC_COS_CLASS2;
 	if (sp->cls3.classValid)
 		ndlp->nlp_class_sup |= FC_COS_CLASS3;
-	if (sp->cls4.classValid)
-		ndlp->nlp_class_sup |= FC_COS_CLASS4;
 	ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
 				sp->cmn.bbRcvSizeLsb;
 
@@ -1356,6 +1354,14 @@ lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		/* Can't do SLI4 class2 without support sequence coalescing */
 		sp->cls2.classValid = 0;
 		sp->cls2.seqDelivery = 0;
+
+		/* Fill out Auxiliary Parameter Data */
+		if (phba->pni) {
+			sp->aux.flags =
+				AUX_PARM_DATA_VALID | AUX_PARM_PNI_VALID;
+			sp->aux.pni = cpu_to_be64(phba->pni);
+			sp->aux.npiv_cnt = cpu_to_be16(phba->max_vpi - 1);
+		}
 	} else {
 		/* Historical, setting sequential-delivery bit for SLI3 */
 		sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
@@ -5657,7 +5663,6 @@ lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
 			sp->cls1.classValid = 0;
 			sp->cls2.classValid = 0;
 			sp->cls3.classValid = 0;
-			sp->cls4.classValid = 0;
 
 			/* Copy our worldwide names */
 			memcpy(&sp->portName, &vport->fc_sparam.portName,
@@ -11510,6 +11515,13 @@ lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	sp->cls2.seqDelivery = 1;
 	sp->cls3.seqDelivery = 1;
 
+	/* Fill out Auxiliary Parameter Data */
+	if (phba->pni) {
+		sp->aux.flags =
+			AUX_PARM_DATA_VALID | AUX_PARM_PNI_VALID;
+		sp->aux.pni = cpu_to_be64(phba->pni);
+	}
+
 	pcmd += sizeof(uint32_t); /* CSP Word 2 */
 	pcmd += sizeof(uint32_t); /* CSP Word 3 */
 	pcmd += sizeof(uint32_t); /* CSP Word 4 */
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 717ae56c8e4b..bb803f32bc1b 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -4373,6 +4373,8 @@ out:
 		lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
 		lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
 		lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
+		if (phba->pni)
+			lpfc_ns_cmd(vport, SLI_CTNS_RSPNI_PNI, 0, 0);
 		lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
 
 		if ((vport->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
diff --git a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
index 3bc0efa7453e..b2e353590ebb 100644
--- a/drivers/scsi/lpfc/lpfc_hw.h
+++ b/drivers/scsi/lpfc/lpfc_hw.h
@@ -168,6 +168,11 @@ struct lpfc_sli_ct_request {
 			uint8_t len;
 			uint8_t symbname[255];
 		} rspn;
+		struct rspni {	/* For RSPNI_PNI requests */
+			__be64 pni;
+			u8 len;
+			u8 symbname[255];
+		} rspni;
 		struct gff {
 			uint32_t PortId;
 		} gff;
@@ -213,6 +218,8 @@ struct lpfc_sli_ct_request {
 			  sizeof(struct da_id))
 #define  RSPN_REQUEST_SZ  (offsetof(struct lpfc_sli_ct_request, un) + \
 			   sizeof(struct rspn))
+#define  RSPNI_REQUEST_SZ (offsetof(struct lpfc_sli_ct_request, un) + \
+			   sizeof(struct rspni))
 
 /*
  * FsType Definitions
@@ -309,6 +316,7 @@ struct lpfc_sli_ct_request {
 #define  SLI_CTNS_RIP_NN      0x0235
 #define  SLI_CTNS_RIPA_NN     0x0236
 #define  SLI_CTNS_RSNN_NN     0x0239
+#define  SLI_CTNS_RSPNI_PNI   0x0240
 #define  SLI_CTNS_DA_ID       0x0300
 
 /*
@@ -512,6 +520,21 @@ struct class_parms {
 	uint8_t word3Reserved2;	/* Fc Word 3, bit  0: 7 */
 };
 
+enum aux_parm_flags {
+	AUX_PARM_PNI_VALID = 0x20,	/* FC Word 0, bit 29 */
+	AUX_PARM_DATA_VALID = 0x40,	/* FC Word 0, bit 30 */
+};
+
+struct aux_parm {
+	u8 flags;	/* FC Word 0, bit 31:24 */
+	u8 ext_feat[3];	/* FC Word 0, bit 23:0 */
+
+	__be64 pni;	/* FC Word 1 and 2, platform name identifier */
+
+	__be16 rsvd;	/* FC Word 3, bit 31:16 */
+	__be16 npiv_cnt;	/* FC Word 3, bit 15:0 */
+} __packed;
+
 struct serv_parm {	/* Structure is in Big Endian format */
 	struct csp cmn;
 	struct lpfc_name portName;
@@ -519,7 +542,7 @@ struct serv_parm {	/* Structure is in Big Endian format */
 	struct class_parms cls1;
 	struct class_parms cls2;
 	struct class_parms cls3;
-	struct class_parms cls4;
+	struct aux_parm aux;
 	union {
 		uint8_t vendorVersion[16];
 		struct {
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index a6da7c392405..8240d59f4120 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -432,8 +432,6 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		ndlp->nlp_class_sup |= FC_COS_CLASS2;
 	if (sp->cls3.classValid)
 		ndlp->nlp_class_sup |= FC_COS_CLASS3;
-	if (sp->cls4.classValid)
-		ndlp->nlp_class_sup |= FC_COS_CLASS4;
 	ndlp->nlp_maxframe =
 		((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 	/* if already logged in, do implicit logout */
@@ -1417,8 +1415,6 @@ lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 		ndlp->nlp_class_sup |= FC_COS_CLASS2;
 	if (sp->cls3.classValid)
 		ndlp->nlp_class_sup |= FC_COS_CLASS3;
-	if (sp->cls4.classValid)
-		ndlp->nlp_class_sup |= FC_COS_CLASS4;
 	ndlp->nlp_maxframe =
 		((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 41eb558dd139..73d77cfab5f8 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -27,6 +27,8 @@
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/lockdep.h>
+#include <linux/dmi.h>
+#include <linux/of.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -8447,6 +8449,70 @@ lpfc_set_host_tm(struct lpfc_hba *phba)
 }
 
 /**
+ * lpfc_get_platform_uuid - Attempts to extract a platform uuid
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine attempts to first read SMBIOS DMI data for the System
+ * Information structure offset 08h called System UUID.  Else, no platform
+ * UUID will be advertised.
+ **/
+static void
+lpfc_get_platform_uuid(struct lpfc_hba *phba)
+{
+	int rc;
+	const char *uuid;
+	char pni[17] = {0}; /* 16 characters + '\0' */
+	bool is_ff = true, is_00 = true;
+	u8 i;
+
+	/* First attempt SMBIOS DMI */
+	uuid = dmi_get_system_info(DMI_PRODUCT_UUID);
+	if (uuid) {
+		lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+				"2088 SMBIOS UUID %s\n",
+				uuid);
+	} else {
+		lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+				"2099 Could not extract UUID\n");
+	}
+
+	if (uuid && uuid_is_valid(uuid)) {
+		/* Generate PNI from UUID format.
+		 *
+		 * 1.) Extract lower 64 bits from UUID format.
+		 * 2.) Set 3h for NAA Locally Assigned Name Identifier format.
+		 *
+		 * e.g. xxxxxxxx-xxxx-xxxx-yyyy-yyyyyyyyyyyy
+		 *
+		 * extract the yyyy-yyyyyyyyyyyy portion
+		 * final PNI   3yyyyyyyyyyyyyyy
+		 */
+		scnprintf(pni, sizeof(pni), "3%c%c%c%s",
+			  uuid[20], uuid[21], uuid[22], &uuid[24]);
+
+		/* Sanitize the converted PNI */
+		for (i = 1; i < 16 && (is_ff || is_00); i++) {
+			if (pni[i] != '0')
+				is_00 = false;
+			if (pni[i] != 'f' && pni[i] != 'F')
+				is_ff = false;
+		}
+
+		/* Convert from char* to unsigned long */
+		rc = kstrtoul(pni, 16, &phba->pni);
+		if (!rc && !is_ff && !is_00) {
+			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+					"2100 PNI 0x%016lx\n", phba->pni);
+		} else {
+			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+					"2101 PNI %s generation status %d\n",
+					pni, rc);
+			phba->pni = 0;
+		}
+	}
+}
+
+/**
  * lpfc_sli4_hba_setup - SLI4 device initialization PCI function
  * @phba: Pointer to HBA context object.
  *
@@ -8529,6 +8595,10 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 		clear_bit(HBA_FCOE_MODE, &phba->hba_flag);
 	}
 
+	/* Obtain platform UUID, only for SLI4 FC adapters */
+	if (!test_bit(HBA_FCOE_MODE, &phba->hba_flag))
+		lpfc_get_platform_uuid(phba);
+
 	if (bf_get(lpfc_mbx_rd_rev_cee_ver, &mqe->un.read_rev) ==
 		LPFC_DCBX_CEE_MODE)
 		set_bit(HBA_FIP_SUPPORT, &phba->hba_flag);