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linux-7.2.3/drivers/scsi/elx/libefc/efc.h

@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#ifndef __EFC_H__
+#define __EFC_H__
+
+#include "../include/efc_common.h"
+#include "efclib.h"
+#include "efc_sm.h"
+#include "efc_cmds.h"
+#include "efc_domain.h"
+#include "efc_nport.h"
+#include "efc_node.h"
+#include "efc_fabric.h"
+#include "efc_device.h"
+#include "efc_els.h"
+
+#define EFC_MAX_REMOTE_NODES			2048
+#define NODE_SPARAMS_SIZE			256
+
+enum efc_scsi_del_initiator_reason {
+	EFC_SCSI_INITIATOR_DELETED,
+	EFC_SCSI_INITIATOR_MISSING,
+};
+
+enum efc_scsi_del_target_reason {
+	EFC_SCSI_TARGET_DELETED,
+	EFC_SCSI_TARGET_MISSING,
+};
+
+#define EFC_FC_ELS_DEFAULT_RETRIES		3
+
+#define domain_sm_trace(domain) \
+	efc_log_debug(domain->efc, "[domain:%s] %-20s %-20s\n", \
+		      domain->display_name, __func__, efc_sm_event_name(evt)) \
+
+#define domain_trace(domain, fmt, ...) \
+	efc_log_debug(domain->efc, \
+		      "[%s]" fmt, domain->display_name, ##__VA_ARGS__) \
+
+#define node_sm_trace() \
+	efc_log_debug(node->efc, "[%s] %-20s %-20s\n", \
+		      node->display_name, __func__, efc_sm_event_name(evt)) \
+
+#define nport_sm_trace(nport) \
+	efc_log_debug(nport->efc, \
+		"[%s]  %-20s %-20s\n", nport->display_name, __func__, efc_sm_event_name(evt)) \
+
+#endif /* __EFC_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_cmds.c

@@ -0,0 +1,782 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#include "efclib.h"
+#include "../libefc_sli/sli4.h"
+#include "efc_cmds.h"
+#include "efc_sm.h"
+
+static void
+efc_nport_free_resources(struct efc_nport *nport, int evt, void *data)
+{
+	struct efc *efc = nport->efc;
+
+	/* Clear the nport attached flag */
+	nport->attached = false;
+
+	/* Free the service parameters buffer */
+	if (nport->dma.virt) {
+		dma_free_coherent(&efc->pci->dev, nport->dma.size,
+				  nport->dma.virt, nport->dma.phys);
+		memset(&nport->dma, 0, sizeof(struct efc_dma));
+	}
+
+	/* Free the SLI resources */
+	sli_resource_free(efc->sli, SLI4_RSRC_VPI, nport->indicator);
+
+	efc_nport_cb(efc, evt, nport);
+}
+
+static int
+efc_nport_get_mbox_status(struct efc_nport *nport, u8 *mqe, int status)
+{
+	struct efc *efc = nport->efc;
+	struct sli4_mbox_command_header *hdr =
+			(struct sli4_mbox_command_header *)mqe;
+
+	if (status || le16_to_cpu(hdr->status)) {
+		efc_log_debug(efc, "bad status vpi=%#x st=%x hdr=%x\n",
+			      nport->indicator, status, le16_to_cpu(hdr->status));
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int
+efc_nport_free_unreg_vpi_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_nport *nport = arg;
+	int evt = EFC_EVT_NPORT_FREE_OK;
+	int rc;
+
+	rc = efc_nport_get_mbox_status(nport, mqe, status);
+	if (rc)
+		evt = EFC_EVT_NPORT_FREE_FAIL;
+
+	efc_nport_free_resources(nport, evt, mqe);
+	return rc;
+}
+
+static void
+efc_nport_free_unreg_vpi(struct efc_nport *nport)
+{
+	struct efc *efc = nport->efc;
+	int rc;
+	u8 data[SLI4_BMBX_SIZE];
+
+	rc = sli_cmd_unreg_vpi(efc->sli, data, nport->indicator,
+			       SLI4_UNREG_TYPE_PORT);
+	if (rc) {
+		efc_log_err(efc, "UNREG_VPI format failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_FREE_FAIL, data);
+		return;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+				     efc_nport_free_unreg_vpi_cb, nport);
+	if (rc) {
+		efc_log_err(efc, "UNREG_VPI command failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_FREE_FAIL, data);
+	}
+}
+
+static void
+efc_nport_send_evt(struct efc_nport *nport, int evt, void *data)
+{
+	struct efc *efc = nport->efc;
+
+	/* Now inform the registered callbacks */
+	efc_nport_cb(efc, evt, nport);
+
+	/* Set the nport attached flag */
+	if (evt == EFC_EVT_NPORT_ATTACH_OK)
+		nport->attached = true;
+
+	/* If there is a pending free request, then handle it now */
+	if (nport->free_req_pending)
+		efc_nport_free_unreg_vpi(nport);
+}
+
+static int
+efc_nport_alloc_init_vpi_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_nport *nport = arg;
+
+	if (efc_nport_get_mbox_status(nport, mqe, status)) {
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, mqe);
+		return -EIO;
+	}
+
+	efc_nport_send_evt(nport, EFC_EVT_NPORT_ALLOC_OK, mqe);
+	return 0;
+}
+
+static void
+efc_nport_alloc_init_vpi(struct efc_nport *nport)
+{
+	struct efc *efc = nport->efc;
+	u8 data[SLI4_BMBX_SIZE];
+	int rc;
+
+	/* If there is a pending free request, then handle it now */
+	if (nport->free_req_pending) {
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_FREE_OK, data);
+		return;
+	}
+
+	rc = sli_cmd_init_vpi(efc->sli, data,
+			      nport->indicator, nport->domain->indicator);
+	if (rc) {
+		efc_log_err(efc, "INIT_VPI format failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, data);
+		return;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+			efc_nport_alloc_init_vpi_cb, nport);
+	if (rc) {
+		efc_log_err(efc, "INIT_VPI command failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, data);
+	}
+}
+
+static int
+efc_nport_alloc_read_sparm64_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_nport *nport = arg;
+	u8 *payload = NULL;
+
+	if (efc_nport_get_mbox_status(nport, mqe, status)) {
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, mqe);
+		return -EIO;
+	}
+
+	payload = nport->dma.virt;
+
+	memcpy(&nport->sli_wwpn, payload + SLI4_READ_SPARM64_WWPN_OFFSET,
+	       sizeof(nport->sli_wwpn));
+	memcpy(&nport->sli_wwnn, payload + SLI4_READ_SPARM64_WWNN_OFFSET,
+	       sizeof(nport->sli_wwnn));
+
+	dma_free_coherent(&efc->pci->dev, nport->dma.size, nport->dma.virt,
+			  nport->dma.phys);
+	memset(&nport->dma, 0, sizeof(struct efc_dma));
+	efc_nport_alloc_init_vpi(nport);
+	return 0;
+}
+
+static void
+efc_nport_alloc_read_sparm64(struct efc *efc, struct efc_nport *nport)
+{
+	u8 data[SLI4_BMBX_SIZE];
+	int rc;
+
+	/* Allocate memory for the service parameters */
+	nport->dma.size = EFC_SPARAM_DMA_SZ;
+	nport->dma.virt = dma_alloc_coherent(&efc->pci->dev,
+					     nport->dma.size, &nport->dma.phys,
+					     GFP_KERNEL);
+	if (!nport->dma.virt) {
+		efc_log_err(efc, "Failed to allocate DMA memory\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, data);
+		return;
+	}
+
+	rc = sli_cmd_read_sparm64(efc->sli, data,
+				  &nport->dma, nport->indicator);
+	if (rc) {
+		efc_log_err(efc, "READ_SPARM64 format failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, data);
+		return;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+				     efc_nport_alloc_read_sparm64_cb, nport);
+	if (rc) {
+		efc_log_err(efc, "READ_SPARM64 command failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ALLOC_FAIL, data);
+	}
+}
+
+int
+efc_cmd_nport_alloc(struct efc *efc, struct efc_nport *nport,
+		    struct efc_domain *domain, u8 *wwpn)
+{
+	u32 index;
+
+	nport->indicator = U32_MAX;
+	nport->free_req_pending = false;
+
+	if (wwpn)
+		memcpy(&nport->sli_wwpn, wwpn, sizeof(nport->sli_wwpn));
+
+	/*
+	 * allocate a VPI object for the port and stores it in the
+	 * indicator field of the port object.
+	 */
+	if (sli_resource_alloc(efc->sli, SLI4_RSRC_VPI,
+			       &nport->indicator, &index)) {
+		efc_log_err(efc, "VPI allocation failure\n");
+		return -EIO;
+	}
+
+	if (domain) {
+		/*
+		 * If the WWPN is NULL, fetch the default
+		 * WWPN and WWNN before initializing the VPI
+		 */
+		if (!wwpn)
+			efc_nport_alloc_read_sparm64(efc, nport);
+		else
+			efc_nport_alloc_init_vpi(nport);
+	} else if (!wwpn) {
+		/* domain NULL and wwpn non-NULL */
+		efc_log_err(efc, "need WWN for physical port\n");
+		sli_resource_free(efc->sli, SLI4_RSRC_VPI, nport->indicator);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int
+efc_nport_attach_reg_vpi_cb(struct efc *efc, int status, u8 *mqe,
+			    void *arg)
+{
+	struct efc_nport *nport = arg;
+
+	nport->attaching = false;
+	if (efc_nport_get_mbox_status(nport, mqe, status)) {
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ATTACH_FAIL, mqe);
+		return -EIO;
+	}
+
+	efc_nport_send_evt(nport, EFC_EVT_NPORT_ATTACH_OK, mqe);
+	return 0;
+}
+
+int
+efc_cmd_nport_attach(struct efc *efc, struct efc_nport *nport, u32 fc_id)
+{
+	u8 buf[SLI4_BMBX_SIZE];
+	int rc = 0;
+
+	if (!nport) {
+		efc_log_err(efc, "bad param(s) nport=%p\n", nport);
+		return -EIO;
+	}
+
+	nport->fc_id = fc_id;
+
+	/* register previously-allocated VPI with the device */
+	rc = sli_cmd_reg_vpi(efc->sli, buf, nport->fc_id,
+			     nport->sli_wwpn, nport->indicator,
+			    nport->domain->indicator, false);
+	if (rc) {
+		efc_log_err(efc, "REG_VPI format failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ATTACH_FAIL, buf);
+		return rc;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, buf,
+				     efc_nport_attach_reg_vpi_cb, nport);
+	if (rc) {
+		efc_log_err(efc, "REG_VPI command failure\n");
+		efc_nport_free_resources(nport, EFC_EVT_NPORT_ATTACH_FAIL, buf);
+	} else {
+		nport->attaching = true;
+	}
+
+	return rc;
+}
+
+int
+efc_cmd_nport_free(struct efc *efc, struct efc_nport *nport)
+{
+	if (!nport) {
+		efc_log_err(efc, "bad parameter(s) nport=%p\n",	nport);
+		return -EIO;
+	}
+
+	/* Issue the UNREG_VPI command to free the assigned VPI context */
+	if (nport->attached)
+		efc_nport_free_unreg_vpi(nport);
+	else if (nport->attaching)
+		nport->free_req_pending = true;
+	else
+		efc_sm_post_event(&nport->sm, EFC_EVT_NPORT_FREE_OK, NULL);
+
+	return 0;
+}
+
+static int
+efc_domain_get_mbox_status(struct efc_domain *domain, u8 *mqe, int status)
+{
+	struct efc *efc = domain->efc;
+	struct sli4_mbox_command_header *hdr =
+			(struct sli4_mbox_command_header *)mqe;
+
+	if (status || le16_to_cpu(hdr->status)) {
+		efc_log_debug(efc, "bad status vfi=%#x st=%x hdr=%x\n",
+			      domain->indicator, status,
+			      le16_to_cpu(hdr->status));
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void
+efc_domain_free_resources(struct efc_domain *domain, int evt, void *data)
+{
+	struct efc *efc = domain->efc;
+
+	/* Free the service parameters buffer */
+	if (domain->dma.virt) {
+		dma_free_coherent(&efc->pci->dev,
+				  domain->dma.size, domain->dma.virt,
+				  domain->dma.phys);
+		memset(&domain->dma, 0, sizeof(struct efc_dma));
+	}
+
+	/* Free the SLI resources */
+	sli_resource_free(efc->sli, SLI4_RSRC_VFI, domain->indicator);
+
+	efc_domain_cb(efc, evt, domain);
+}
+
+static void
+efc_domain_send_nport_evt(struct efc_domain *domain,
+			  int port_evt, int domain_evt, void *data)
+{
+	struct efc *efc = domain->efc;
+
+	/* Send alloc/attach ok to the physical nport */
+	efc_nport_send_evt(domain->nport, port_evt, NULL);
+
+	/* Now inform the registered callbacks */
+	efc_domain_cb(efc, domain_evt, domain);
+}
+
+static int
+efc_domain_alloc_read_sparm64_cb(struct efc *efc, int status, u8 *mqe,
+				 void *arg)
+{
+	struct efc_domain *domain = arg;
+
+	if (efc_domain_get_mbox_status(domain, mqe, status)) {
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, mqe);
+		return -EIO;
+	}
+
+	efc_domain_send_nport_evt(domain, EFC_EVT_NPORT_ALLOC_OK,
+				  EFC_HW_DOMAIN_ALLOC_OK, mqe);
+	return 0;
+}
+
+static void
+efc_domain_alloc_read_sparm64(struct efc_domain *domain)
+{
+	struct efc *efc = domain->efc;
+	u8 data[SLI4_BMBX_SIZE];
+	int rc;
+
+	rc = sli_cmd_read_sparm64(efc->sli, data, &domain->dma, 0);
+	if (rc) {
+		efc_log_err(efc, "READ_SPARM64 format failure\n");
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, data);
+		return;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+				     efc_domain_alloc_read_sparm64_cb, domain);
+	if (rc) {
+		efc_log_err(efc, "READ_SPARM64 command failure\n");
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, data);
+	}
+}
+
+static int
+efc_domain_alloc_init_vfi_cb(struct efc *efc, int status, u8 *mqe,
+			     void *arg)
+{
+	struct efc_domain *domain = arg;
+
+	if (efc_domain_get_mbox_status(domain, mqe, status)) {
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, mqe);
+		return -EIO;
+	}
+
+	efc_domain_alloc_read_sparm64(domain);
+	return 0;
+}
+
+static void
+efc_domain_alloc_init_vfi(struct efc_domain *domain)
+{
+	struct efc *efc = domain->efc;
+	struct efc_nport *nport = domain->nport;
+	u8 data[SLI4_BMBX_SIZE];
+	int rc;
+
+	/*
+	 * For FC, the HW alread registered an FCFI.
+	 * Copy FCF information into the domain and jump to INIT_VFI.
+	 */
+	domain->fcf_indicator = efc->fcfi;
+	rc = sli_cmd_init_vfi(efc->sli, data, domain->indicator,
+			      domain->fcf_indicator, nport->indicator);
+	if (rc) {
+		efc_log_err(efc, "INIT_VFI format failure\n");
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, data);
+		return;
+	}
+
+	efc_log_err(efc, "%s issue mbox\n", __func__);
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+				     efc_domain_alloc_init_vfi_cb, domain);
+	if (rc) {
+		efc_log_err(efc, "INIT_VFI command failure\n");
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ALLOC_FAIL, data);
+	}
+}
+
+int
+efc_cmd_domain_alloc(struct efc *efc, struct efc_domain *domain, u32 fcf)
+{
+	u32 index;
+
+	if (!domain || !domain->nport) {
+		efc_log_err(efc, "bad parameter(s) domain=%p nport=%p\n",
+			    domain, domain ? domain->nport : NULL);
+		return -EIO;
+	}
+
+	/* allocate memory for the service parameters */
+	domain->dma.size = EFC_SPARAM_DMA_SZ;
+	domain->dma.virt = dma_alloc_coherent(&efc->pci->dev,
+					      domain->dma.size,
+					      &domain->dma.phys, GFP_KERNEL);
+	if (!domain->dma.virt) {
+		efc_log_err(efc, "Failed to allocate DMA memory\n");
+		return -EIO;
+	}
+
+	domain->fcf = fcf;
+	domain->fcf_indicator = U32_MAX;
+	domain->indicator = U32_MAX;
+
+	if (sli_resource_alloc(efc->sli, SLI4_RSRC_VFI, &domain->indicator,
+			       &index)) {
+		efc_log_err(efc, "VFI allocation failure\n");
+
+		dma_free_coherent(&efc->pci->dev,
+				  domain->dma.size, domain->dma.virt,
+				  domain->dma.phys);
+		memset(&domain->dma, 0, sizeof(struct efc_dma));
+
+		return -EIO;
+	}
+
+	efc_domain_alloc_init_vfi(domain);
+	return 0;
+}
+
+static int
+efc_domain_attach_reg_vfi_cb(struct efc *efc, int status, u8 *mqe,
+			     void *arg)
+{
+	struct efc_domain *domain = arg;
+
+	if (efc_domain_get_mbox_status(domain, mqe, status)) {
+		efc_domain_free_resources(domain,
+					  EFC_HW_DOMAIN_ATTACH_FAIL, mqe);
+		return -EIO;
+	}
+
+	efc_domain_send_nport_evt(domain, EFC_EVT_NPORT_ATTACH_OK,
+				  EFC_HW_DOMAIN_ATTACH_OK, mqe);
+	return 0;
+}
+
+int
+efc_cmd_domain_attach(struct efc *efc, struct efc_domain *domain, u32 fc_id)
+{
+	u8 buf[SLI4_BMBX_SIZE];
+	int rc = 0;
+
+	if (!domain) {
+		efc_log_err(efc, "bad param(s) domain=%p\n", domain);
+		return -EIO;
+	}
+
+	domain->nport->fc_id = fc_id;
+
+	rc = sli_cmd_reg_vfi(efc->sli, buf, SLI4_BMBX_SIZE, domain->indicator,
+			     domain->fcf_indicator, domain->dma,
+			     domain->nport->indicator, domain->nport->sli_wwpn,
+			     domain->nport->fc_id);
+	if (rc) {
+		efc_log_err(efc, "REG_VFI format failure\n");
+		goto cleanup;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, buf,
+				     efc_domain_attach_reg_vfi_cb, domain);
+	if (rc) {
+		efc_log_err(efc, "REG_VFI command failure\n");
+		goto cleanup;
+	}
+
+	return rc;
+
+cleanup:
+	efc_domain_free_resources(domain, EFC_HW_DOMAIN_ATTACH_FAIL, buf);
+
+	return rc;
+}
+
+static int
+efc_domain_free_unreg_vfi_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_domain *domain = arg;
+	int evt = EFC_HW_DOMAIN_FREE_OK;
+	int rc;
+
+	rc = efc_domain_get_mbox_status(domain, mqe, status);
+	if (rc) {
+		evt = EFC_HW_DOMAIN_FREE_FAIL;
+		rc = -EIO;
+	}
+
+	efc_domain_free_resources(domain, evt, mqe);
+	return rc;
+}
+
+static void
+efc_domain_free_unreg_vfi(struct efc_domain *domain)
+{
+	struct efc *efc = domain->efc;
+	int rc;
+	u8 data[SLI4_BMBX_SIZE];
+
+	rc = sli_cmd_unreg_vfi(efc->sli, data, domain->indicator,
+			       SLI4_UNREG_TYPE_DOMAIN);
+	if (rc) {
+		efc_log_err(efc, "UNREG_VFI format failure\n");
+		goto cleanup;
+	}
+
+	rc = efc->tt.issue_mbox_rqst(efc->base, data,
+				     efc_domain_free_unreg_vfi_cb, domain);
+	if (rc) {
+		efc_log_err(efc, "UNREG_VFI command failure\n");
+		goto cleanup;
+	}
+
+	return;
+
+cleanup:
+	efc_domain_free_resources(domain, EFC_HW_DOMAIN_FREE_FAIL, data);
+}
+
+int
+efc_cmd_domain_free(struct efc *efc, struct efc_domain *domain)
+{
+	if (!domain) {
+		efc_log_err(efc, "bad parameter(s) domain=%p\n", domain);
+		return -EIO;
+	}
+
+	efc_domain_free_unreg_vfi(domain);
+	return 0;
+}
+
+int
+efc_cmd_node_alloc(struct efc *efc, struct efc_remote_node *rnode, u32 fc_addr,
+		   struct efc_nport *nport)
+{
+	/* Check for invalid indicator */
+	if (rnode->indicator != U32_MAX) {
+		efc_log_err(efc,
+			    "RPI allocation failure addr=%#x rpi=%#x\n",
+			    fc_addr, rnode->indicator);
+		return -EIO;
+	}
+
+	/* NULL SLI port indicates an unallocated remote node */
+	rnode->nport = NULL;
+
+	if (sli_resource_alloc(efc->sli, SLI4_RSRC_RPI,
+			       &rnode->indicator, &rnode->index)) {
+		efc_log_err(efc, "RPI allocation failure addr=%#x\n",
+			    fc_addr);
+		return -EIO;
+	}
+
+	rnode->fc_id = fc_addr;
+	rnode->nport = nport;
+
+	return 0;
+}
+
+static int
+efc_cmd_node_attach_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_remote_node *rnode = arg;
+	struct sli4_mbox_command_header *hdr =
+				(struct sli4_mbox_command_header *)mqe;
+	int evt = 0;
+
+	if (status || le16_to_cpu(hdr->status)) {
+		efc_log_debug(efc, "bad status cqe=%#x mqe=%#x\n", status,
+			      le16_to_cpu(hdr->status));
+		rnode->attached = false;
+		evt = EFC_EVT_NODE_ATTACH_FAIL;
+	} else {
+		rnode->attached = true;
+		evt = EFC_EVT_NODE_ATTACH_OK;
+	}
+
+	efc_remote_node_cb(efc, evt, rnode);
+
+	return 0;
+}
+
+int
+efc_cmd_node_attach(struct efc *efc, struct efc_remote_node *rnode,
+		    struct efc_dma *sparms)
+{
+	int rc = -EIO;
+	u8 buf[SLI4_BMBX_SIZE];
+
+	if (!rnode || !sparms) {
+		efc_log_err(efc, "bad parameter(s) rnode=%p sparms=%p\n",
+			    rnode, sparms);
+		return -EIO;
+	}
+
+	/*
+	 * If the attach count is non-zero, this RPI has already been reg'd.
+	 * Otherwise, register the RPI
+	 */
+	if (rnode->index == U32_MAX) {
+		efc_log_err(efc, "bad parameter rnode->index invalid\n");
+		return -EIO;
+	}
+
+	/* Update a remote node object with the remote port's service params */
+	if (!sli_cmd_reg_rpi(efc->sli, buf, rnode->indicator,
+			     rnode->nport->indicator, rnode->fc_id, sparms, 0, 0))
+		rc = efc->tt.issue_mbox_rqst(efc->base, buf,
+					     efc_cmd_node_attach_cb, rnode);
+
+	return rc;
+}
+
+int
+efc_node_free_resources(struct efc *efc, struct efc_remote_node *rnode)
+{
+	int rc = 0;
+
+	if (!rnode) {
+		efc_log_err(efc, "bad parameter rnode=%p\n", rnode);
+		return -EIO;
+	}
+
+	if (rnode->nport) {
+		if (rnode->attached) {
+			efc_log_err(efc, "rnode is still attached\n");
+			return -EIO;
+		}
+		if (rnode->indicator != U32_MAX) {
+			if (sli_resource_free(efc->sli, SLI4_RSRC_RPI,
+					      rnode->indicator)) {
+				efc_log_err(efc,
+					    "RPI free fail RPI %d addr=%#x\n",
+					    rnode->indicator, rnode->fc_id);
+				rc = -EIO;
+			} else {
+				rnode->indicator = U32_MAX;
+				rnode->index = U32_MAX;
+			}
+		}
+	}
+
+	return rc;
+}
+
+static int
+efc_cmd_node_free_cb(struct efc *efc, int status, u8 *mqe, void *arg)
+{
+	struct efc_remote_node *rnode = arg;
+	struct sli4_mbox_command_header *hdr =
+				(struct sli4_mbox_command_header *)mqe;
+	int evt = EFC_EVT_NODE_FREE_FAIL;
+	int rc = 0;
+
+	if (status || le16_to_cpu(hdr->status)) {
+		efc_log_debug(efc, "bad status cqe=%#x mqe=%#x\n", status,
+			      le16_to_cpu(hdr->status));
+
+		/*
+		 * In certain cases, a non-zero MQE status is OK (all must be
+		 * true):
+		 *   - node is attached
+		 *   - status is 0x1400
+		 */
+		if (!rnode->attached ||
+		    (le16_to_cpu(hdr->status) != SLI4_MBX_STATUS_RPI_NOT_REG))
+			rc = -EIO;
+	}
+
+	if (!rc) {
+		rnode->attached = false;
+		evt = EFC_EVT_NODE_FREE_OK;
+	}
+
+	efc_remote_node_cb(efc, evt, rnode);
+
+	return rc;
+}
+
+int
+efc_cmd_node_detach(struct efc *efc, struct efc_remote_node *rnode)
+{
+	u8 buf[SLI4_BMBX_SIZE];
+	int rc = -EIO;
+
+	if (!rnode) {
+		efc_log_err(efc, "bad parameter rnode=%p\n", rnode);
+		return -EIO;
+	}
+
+	if (rnode->nport) {
+		if (!rnode->attached)
+			return -EIO;
+
+		rc = -EIO;
+
+		if (!sli_cmd_unreg_rpi(efc->sli, buf, rnode->indicator,
+				       SLI4_RSRC_RPI, U32_MAX))
+			rc = efc->tt.issue_mbox_rqst(efc->base, buf,
+					efc_cmd_node_free_cb, rnode);
+
+		if (rc != 0) {
+			efc_log_err(efc, "UNREG_RPI failed\n");
+			rc = -EIO;
+		}
+	}
+
+	return rc;
+}

linux-7.2.3/drivers/scsi/elx/libefc/efc_cmds.h

@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#ifndef __EFC_CMDS_H__
+#define __EFC_CMDS_H__
+
+#define EFC_SPARAM_DMA_SZ	112
+int
+efc_cmd_nport_alloc(struct efc *efc, struct efc_nport *nport,
+		    struct efc_domain *domain, u8 *wwpn);
+int
+efc_cmd_nport_attach(struct efc *efc, struct efc_nport *nport, u32 fc_id);
+int
+efc_cmd_nport_free(struct efc *efc, struct efc_nport *nport);
+int
+efc_cmd_domain_alloc(struct efc *efc, struct efc_domain *domain, u32 fcf);
+int
+efc_cmd_domain_attach(struct efc *efc, struct efc_domain *domain, u32 fc_id);
+int
+efc_cmd_domain_free(struct efc *efc, struct efc_domain *domain);
+int
+efc_cmd_node_detach(struct efc *efc, struct efc_remote_node *rnode);
+int
+efc_node_free_resources(struct efc *efc, struct efc_remote_node *rnode);
+int
+efc_cmd_node_attach(struct efc *efc, struct efc_remote_node *rnode,
+		    struct efc_dma *sparms);
+int
+efc_cmd_node_alloc(struct efc *efc, struct efc_remote_node *rnode, u32 fc_addr,
+		   struct efc_nport *nport);
+
+#endif /* __EFC_CMDS_H */

linux-7.2.3/drivers/scsi/elx/libefc/efc_device.h

@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * Node state machine functions for remote device node sm
+ */
+
+#ifndef __EFCT_DEVICE_H__
+#define __EFCT_DEVICE_H__
+void
+efc_node_init_device(struct efc_node *node, bool send_plogi);
+void
+efc_process_prli_payload(struct efc_node *node,
+			 void *prli);
+void
+efc_d_send_prli_rsp(struct efc_node *node, uint16_t ox_id);
+void
+efc_send_ls_acc_after_attach(struct efc_node *node,
+			     struct fc_frame_header *hdr,
+			     enum efc_node_send_ls_acc ls);
+void
+__efc_d_wait_loop(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_plogi_acc_cmpl(struct efc_sm_ctx *ctx,
+			    enum efc_sm_event evt, void *arg);
+void
+__efc_d_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_plogi_rsp(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_plogi_rsp_recvd_prli(struct efc_sm_ctx *ctx,
+				  enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_domain_attach(struct efc_sm_ctx *ctx,
+			   enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_topology_notify(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_node_attach(struct efc_sm_ctx *ctx,
+			 enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_attach_evt_shutdown(struct efc_sm_ctx *ctx,
+				 enum efc_sm_event evt, void *arg);
+void
+__efc_d_initiate_shutdown(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg);
+void
+__efc_d_port_logged_in(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_logo_acc_cmpl(struct efc_sm_ctx *ctx,
+			   enum efc_sm_event evt, void *arg);
+void
+__efc_d_device_ready(struct efc_sm_ctx *ctx,
+		     enum efc_sm_event evt, void *arg);
+void
+__efc_d_device_gone(struct efc_sm_ctx *ctx,
+		    enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_adisc_rsp(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg);
+void
+__efc_d_wait_logo_rsp(struct efc_sm_ctx *ctx,
+		      enum efc_sm_event evt, void *arg);
+
+#endif /* __EFCT_DEVICE_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_domain.h

@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * Declare driver's domain handler exported interface
+ */
+
+#ifndef __EFCT_DOMAIN_H__
+#define __EFCT_DOMAIN_H__
+
+struct efc_domain *
+efc_domain_alloc(struct efc *efc, uint64_t fcf_wwn);
+void
+efc_domain_free(struct efc_domain *domain);
+
+void
+__efc_domain_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg);
+void
+__efc_domain_wait_alloc(struct efc_sm_ctx *ctx,	enum efc_sm_event evt,
+			void *arg);
+void
+__efc_domain_allocated(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+		       void *arg);
+void
+__efc_domain_wait_attach(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+			 void *arg);
+void
+__efc_domain_ready(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg);
+void
+__efc_domain_wait_nports_free(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+			      void *arg);
+void
+__efc_domain_wait_shutdown(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+			   void *arg);
+void
+__efc_domain_wait_domain_lost(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+			      void *arg);
+void
+efc_domain_attach(struct efc_domain *domain, u32 s_id);
+int
+efc_domain_post_event(struct efc_domain *domain, enum efc_sm_event event,
+		      void *arg);
+void
+__efc_domain_attach_internal(struct efc_domain *domain, u32 s_id);
+
+int
+efc_domain_dispatch_frame(void *arg, struct efc_hw_sequence *seq);
+void
+efc_node_dispatch_frame(void *arg, struct efc_hw_sequence *seq);
+
+#endif /* __EFCT_DOMAIN_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_els.h

@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#ifndef __EFC_ELS_H__
+#define __EFC_ELS_H__
+
+#define EFC_STATUS_INVALID	INT_MAX
+#define EFC_ELS_IO_POOL_SZ	1024
+
+struct efc_els_io_req {
+	struct list_head	list_entry;
+	struct kref		ref;
+	void			(*release)(struct kref *arg);
+	struct efc_node		*node;
+	void			*cb;
+	u32			els_retries_remaining;
+	bool			els_req_free;
+	struct timer_list       delay_timer;
+
+	const char		*display_name;
+
+	struct efc_disc_io	io;
+};
+
+typedef int(*efc_hw_srrs_cb_t)(void *arg, u32 length, int status,
+			       u32 ext_status);
+
+void _efc_els_io_free(struct kref *arg);
+struct efc_els_io_req *
+efc_els_io_alloc(struct efc_node *node, u32 reqlen);
+struct efc_els_io_req *
+efc_els_io_alloc_size(struct efc_node *node, u32 reqlen, u32 rsplen);
+void efc_els_io_free(struct efc_els_io_req *els);
+
+/* ELS command send */
+typedef void (*els_cb_t)(struct efc_node *node,
+			 struct efc_node_cb *cbdata, void *arg);
+int
+efc_send_plogi(struct efc_node *node);
+int
+efc_send_flogi(struct efc_node *node);
+int
+efc_send_fdisc(struct efc_node *node);
+int
+efc_send_prli(struct efc_node *node);
+int
+efc_send_prlo(struct efc_node *node);
+int
+efc_send_logo(struct efc_node *node);
+int
+efc_send_adisc(struct efc_node *node);
+int
+efc_send_pdisc(struct efc_node *node);
+int
+efc_send_scr(struct efc_node *node);
+int
+efc_ns_send_rftid(struct efc_node *node);
+int
+efc_ns_send_rffid(struct efc_node *node);
+int
+efc_ns_send_gidpt(struct efc_node *node);
+void
+efc_els_io_cleanup(struct efc_els_io_req *els, int evt, void *arg);
+
+/* ELS acc send */
+int
+efc_send_ls_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_ls_rjt(struct efc_node *node, u32 ox_id, u32 reason_cod,
+		u32 reason_code_expl, u32 vendor_unique);
+int
+efc_send_flogi_p2p_acc(struct efc_node *node, u32 ox_id, u32 s_id);
+int
+efc_send_flogi_acc(struct efc_node *node, u32 ox_id, u32 is_fport);
+int
+efc_send_plogi_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_prli_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_logo_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_prlo_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_adisc_acc(struct efc_node *node, u32 ox_id);
+
+int
+efc_bls_send_acc_hdr(struct efc *efc, struct efc_node *node,
+		     struct fc_frame_header *hdr);
+int
+efc_bls_send_rjt_hdr(struct efc_els_io_req *io, struct fc_frame_header *hdr);
+
+int
+efc_els_io_list_empty(struct efc_node *node, struct list_head *list);
+
+/* CT */
+int
+efc_send_ct_rsp(struct efc *efc, struct efc_node *node, u16 ox_id,
+		struct fc_ct_hdr *ct_hdr, u32 cmd_rsp_code, u32 reason_code,
+		u32 reason_code_explanation);
+
+int
+efc_send_bls_acc(struct efc_node *node, struct fc_frame_header *hdr);
+
+#endif /* __EFC_ELS_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_fabric.h

@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * Declarations for the interface exported by efc_fabric
+ */
+
+#ifndef __EFCT_FABRIC_H__
+#define __EFCT_FABRIC_H__
+#include "scsi/fc/fc_els.h"
+#include "scsi/fc/fc_fs.h"
+#include "scsi/fc/fc_ns.h"
+
+void
+__efc_fabric_init(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_flogi_wait_rsp(struct efc_sm_ctx *ctx,
+			    enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_domain_attach_wait(struct efc_sm_ctx *ctx,
+				enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_wait_domain_attach(struct efc_sm_ctx *ctx,
+				enum efc_sm_event evt, void *arg);
+
+void
+__efc_vport_fabric_init(struct efc_sm_ctx *ctx,
+			enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_fdisc_wait_rsp(struct efc_sm_ctx *ctx,
+			    enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_wait_nport_attach(struct efc_sm_ctx *ctx,
+			       enum efc_sm_event evt, void *arg);
+
+void
+__efc_ns_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg);
+void
+__efc_ns_plogi_wait_rsp(struct efc_sm_ctx *ctx,
+			enum efc_sm_event evt, void *arg);
+void
+__efc_ns_rftid_wait_rsp(struct efc_sm_ctx *ctx,
+			enum efc_sm_event evt, void *arg);
+void
+__efc_ns_rffid_wait_rsp(struct efc_sm_ctx *ctx,
+			enum efc_sm_event evt, void *arg);
+void
+__efc_ns_wait_node_attach(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_wait_attach_evt_shutdown(struct efc_sm_ctx *ctx,
+				      enum efc_sm_event evt, void *arg);
+void
+__efc_ns_logo_wait_rsp(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event, void *arg);
+void
+__efc_ns_gidpt_wait_rsp(struct efc_sm_ctx *ctx,
+			enum efc_sm_event evt, void *arg);
+void
+__efc_ns_idle(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg);
+void
+__efc_ns_gidpt_delay(struct efc_sm_ctx *ctx,
+		     enum efc_sm_event evt, void *arg);
+void
+__efc_fabctl_init(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+void
+__efc_fabctl_wait_node_attach(struct efc_sm_ctx *ctx,
+			      enum efc_sm_event evt, void *arg);
+void
+__efc_fabctl_wait_scr_rsp(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg);
+void
+__efc_fabctl_ready(struct efc_sm_ctx *ctx,
+		   enum efc_sm_event evt, void *arg);
+void
+__efc_fabctl_wait_ls_acc_cmpl(struct efc_sm_ctx *ctx,
+			      enum efc_sm_event evt, void *arg);
+void
+__efc_fabric_idle(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+
+void
+__efc_p2p_rnode_init(struct efc_sm_ctx *ctx,
+		     enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_domain_attach_wait(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_wait_flogi_acc_cmpl(struct efc_sm_ctx *ctx,
+			      enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_wait_plogi_rsp(struct efc_sm_ctx *ctx,
+			 enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_wait_plogi_rsp_recvd_prli(struct efc_sm_ctx *ctx,
+				    enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_wait_domain_attach(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+__efc_p2p_wait_node_attach(struct efc_sm_ctx *ctx,
+			   enum efc_sm_event evt, void *arg);
+
+int
+efc_p2p_setup(struct efc_nport *nport);
+void
+efc_fabric_set_topology(struct efc_node *node,
+			enum efc_nport_topology topology);
+void efc_fabric_notify_topology(struct efc_node *node);
+
+#endif /* __EFCT_FABRIC_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_node.h

@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#if !defined(__EFC_NODE_H__)
+#define __EFC_NODE_H__
+#include "scsi/fc/fc_ns.h"
+
+#define EFC_NODEDB_PAUSE_FABRIC_LOGIN	(1 << 0)
+#define EFC_NODEDB_PAUSE_NAMESERVER	(1 << 1)
+#define EFC_NODEDB_PAUSE_NEW_NODES	(1 << 2)
+
+#define MAX_ACC_REJECT_PAYLOAD	sizeof(struct fc_els_ls_rjt)
+
+#define scsi_io_printf(io, fmt, ...) \
+	efc_log_debug(io->efc, "[%s] [%04x][i:%04x t:%04x h:%04x]" fmt, \
+	io->node->display_name, io->instance_index, io->init_task_tag, \
+	io->tgt_task_tag, io->hw_tag, ##__VA_ARGS__)
+
+static inline void
+efc_node_evt_set(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+		 const char *handler)
+{
+	struct efc_node *node = ctx->app;
+
+	if (evt == EFC_EVT_ENTER) {
+		strscpy_pad(node->current_state_name, handler,
+			    sizeof(node->current_state_name));
+	} else if (evt == EFC_EVT_EXIT) {
+		memcpy(node->prev_state_name, node->current_state_name,
+		       sizeof(node->prev_state_name));
+		strscpy_pad(node->current_state_name, "invalid",
+			    sizeof(node->current_state_name));
+	}
+	node->prev_evt = node->current_evt;
+	node->current_evt = evt;
+}
+
+/**
+ * hold frames in pending frame list
+ *
+ * Unsolicited receive frames are held on the node pending frame list,
+ * rather than being processed.
+ */
+
+static inline void
+efc_node_hold_frames(struct efc_node *node)
+{
+	node->hold_frames = true;
+}
+
+/**
+ * accept frames
+ *
+ * Unsolicited receive frames processed rather than being held on the node
+ * pending frame list.
+ */
+
+static inline void
+efc_node_accept_frames(struct efc_node *node)
+{
+	node->hold_frames = false;
+}
+
+/*
+ * Node initiator/target enable defines
+ * All combinations of the SLI port (nport) initiator/target enable,
+ * and remote node initiator/target enable are enumerated.
+ * ex: EFC_NODE_ENABLE_T_TO_IT decodes to target mode is enabled on SLI port
+ * and I+T is enabled on remote node.
+ */
+enum efc_node_enable {
+	EFC_NODE_ENABLE_x_TO_x,
+	EFC_NODE_ENABLE_x_TO_T,
+	EFC_NODE_ENABLE_x_TO_I,
+	EFC_NODE_ENABLE_x_TO_IT,
+	EFC_NODE_ENABLE_T_TO_x,
+	EFC_NODE_ENABLE_T_TO_T,
+	EFC_NODE_ENABLE_T_TO_I,
+	EFC_NODE_ENABLE_T_TO_IT,
+	EFC_NODE_ENABLE_I_TO_x,
+	EFC_NODE_ENABLE_I_TO_T,
+	EFC_NODE_ENABLE_I_TO_I,
+	EFC_NODE_ENABLE_I_TO_IT,
+	EFC_NODE_ENABLE_IT_TO_x,
+	EFC_NODE_ENABLE_IT_TO_T,
+	EFC_NODE_ENABLE_IT_TO_I,
+	EFC_NODE_ENABLE_IT_TO_IT,
+};
+
+static inline enum efc_node_enable
+efc_node_get_enable(struct efc_node *node)
+{
+	u32 retval = 0;
+
+	if (node->nport->enable_ini)
+		retval |= (1U << 3);
+	if (node->nport->enable_tgt)
+		retval |= (1U << 2);
+	if (node->init)
+		retval |= (1U << 1);
+	if (node->targ)
+		retval |= (1U << 0);
+	return (enum efc_node_enable)retval;
+}
+
+int
+efc_node_check_els_req(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg,
+		       u8 cmd, void (*efc_node_common_func)(const char *,
+		       struct efc_sm_ctx *, enum efc_sm_event, void *),
+		       const char *funcname);
+int
+efc_node_check_ns_req(struct efc_sm_ctx *ctx,
+		      enum efc_sm_event evt, void *arg,
+		      u16 cmd, void (*efc_node_common_func)(const char *,
+		      struct efc_sm_ctx *, enum efc_sm_event, void *),
+		      const char *funcname);
+int
+efc_node_attach(struct efc_node *node);
+struct efc_node *
+efc_node_alloc(struct efc_nport *nport, u32 port_id,
+	       bool init, bool targ);
+void
+efc_node_free(struct efc_node *efc);
+void
+efc_node_update_display_name(struct efc_node *node);
+void efc_node_post_event(struct efc_node *node, enum efc_sm_event evt,
+			 void *arg);
+
+void
+__efc_node_shutdown(struct efc_sm_ctx *ctx,
+		    enum efc_sm_event evt, void *arg);
+void
+__efc_node_wait_node_free(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg);
+void
+__efc_node_wait_els_shutdown(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+__efc_node_wait_ios_shutdown(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+efc_node_save_sparms(struct efc_node *node, void *payload);
+void
+efc_node_transition(struct efc_node *node,
+		    void (*state)(struct efc_sm_ctx *, enum efc_sm_event,
+				  void *), void *data);
+void
+__efc_node_common(const char *funcname, struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+
+void
+efc_node_initiate_cleanup(struct efc_node *node);
+
+void
+efc_node_build_eui_name(char *buf, u32 buf_len, uint64_t eui_name);
+
+void
+efc_node_pause(struct efc_node *node,
+	       void (*state)(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg));
+void
+__efc_node_paused(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *arg);
+int
+efc_node_active_ios_empty(struct efc_node *node);
+void
+efc_node_send_ls_io_cleanup(struct efc_node *node);
+
+int
+efc_els_io_list_empty(struct efc_node *node, struct list_head *list);
+
+void
+efc_process_node_pending(struct efc_node *domain);
+
+u64 efc_node_get_wwnn(struct efc_node *node);
+struct efc_node *
+efc_node_find(struct efc_nport *nport, u32 id);
+void
+efc_node_post_els_resp(struct efc_node *node, u32 evt, void *arg);
+void
+efc_node_recv_els_frame(struct efc_node *node, struct efc_hw_sequence *s);
+void
+efc_node_recv_ct_frame(struct efc_node *node, struct efc_hw_sequence *seq);
+void
+efc_node_recv_fcp_cmd(struct efc_node *node, struct efc_hw_sequence *seq);
+
+#endif /* __EFC_NODE_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_nport.c

@@ -0,0 +1,777 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * NPORT
+ *
+ * Port object for physical port and NPIV ports.
+ */
+
+/*
+ * NPORT REFERENCE COUNTING
+ *
+ * A nport reference should be taken when:
+ * - an nport is allocated
+ * - a vport populates associated nport
+ * - a remote node is allocated
+ * - a unsolicited frame is processed
+ * The reference should be dropped when:
+ * - the unsolicited frame processesing is done
+ * - the remote node is removed
+ * - the vport is removed
+ * - the nport is removed
+ */
+
+#include "efc.h"
+
+void
+efc_nport_cb(void *arg, int event, void *data)
+{
+	struct efc *efc = arg;
+	struct efc_nport *nport = data;
+	unsigned long flags = 0;
+
+	efc_log_debug(efc, "nport event: %s\n", efc_sm_event_name(event));
+
+	spin_lock_irqsave(&efc->lock, flags);
+	efc_sm_post_event(&nport->sm, event, NULL);
+	spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+static struct efc_nport *
+efc_nport_find_wwn(struct efc_domain *domain, uint64_t wwnn, uint64_t wwpn)
+{
+	struct efc_nport *nport = NULL;
+
+	/* Find a nport, given the WWNN and WWPN */
+	list_for_each_entry(nport, &domain->nport_list, list_entry) {
+		if (nport->wwnn == wwnn && nport->wwpn == wwpn)
+			return nport;
+	}
+	return NULL;
+}
+
+static void
+_efc_nport_free(struct kref *arg)
+{
+	struct efc_nport *nport = container_of(arg, struct efc_nport, ref);
+
+	kfree(nport);
+}
+
+struct efc_nport *
+efc_nport_alloc(struct efc_domain *domain, uint64_t wwpn, uint64_t wwnn,
+		u32 fc_id, bool enable_ini, bool enable_tgt)
+{
+	struct efc_nport *nport;
+
+	if (domain->efc->enable_ini)
+		enable_ini = 0;
+
+	/* Return a failure if this nport has already been allocated */
+	if ((wwpn != 0) || (wwnn != 0)) {
+		nport = efc_nport_find_wwn(domain, wwnn, wwpn);
+		if (nport) {
+			efc_log_err(domain->efc,
+				    "NPORT %016llX %016llX already allocated\n",
+				    wwnn, wwpn);
+			return NULL;
+		}
+	}
+
+	nport = kzalloc_obj(*nport, GFP_ATOMIC);
+	if (!nport)
+		return nport;
+
+	/* initialize refcount */
+	kref_init(&nport->ref);
+	nport->release = _efc_nport_free;
+
+	nport->efc = domain->efc;
+	snprintf(nport->display_name, sizeof(nport->display_name), "------");
+	nport->domain = domain;
+	xa_init(&nport->lookup);
+	nport->instance_index = domain->nport_count++;
+	nport->sm.app = nport;
+	nport->enable_ini = enable_ini;
+	nport->enable_tgt = enable_tgt;
+	nport->enable_rscn = (nport->enable_ini ||
+			(nport->enable_tgt && enable_target_rscn(nport->efc)));
+
+	/* Copy service parameters from domain */
+	memcpy(nport->service_params, domain->service_params,
+	       sizeof(struct fc_els_flogi));
+
+	/* Update requested fc_id */
+	nport->fc_id = fc_id;
+
+	/* Update the nport's service parameters for the new wwn's */
+	nport->wwpn = wwpn;
+	nport->wwnn = wwnn;
+	snprintf(nport->wwnn_str, sizeof(nport->wwnn_str), "%016llX",
+		 (unsigned long long)wwnn);
+
+	/*
+	 * if this is the "first" nport of the domain,
+	 * then make it the "phys" nport
+	 */
+	if (list_empty(&domain->nport_list))
+		domain->nport = nport;
+
+	INIT_LIST_HEAD(&nport->list_entry);
+	list_add_tail(&nport->list_entry, &domain->nport_list);
+
+	kref_get(&domain->ref);
+
+	efc_log_debug(domain->efc, "New Nport [%s]\n", nport->display_name);
+
+	return nport;
+}
+
+void
+efc_nport_free(struct efc_nport *nport)
+{
+	struct efc_domain *domain;
+
+	if (!nport)
+		return;
+
+	domain = nport->domain;
+	efc_log_debug(domain->efc, "[%s] free nport\n", nport->display_name);
+	list_del(&nport->list_entry);
+	/*
+	 * if this is the physical nport,
+	 * then clear it out of the domain
+	 */
+	if (nport == domain->nport)
+		domain->nport = NULL;
+
+	xa_destroy(&nport->lookup);
+	xa_erase(&domain->lookup, nport->fc_id);
+
+	if (list_empty(&domain->nport_list))
+		efc_domain_post_event(domain, EFC_EVT_ALL_CHILD_NODES_FREE,
+				      NULL);
+
+	kref_put(&domain->ref, domain->release);
+	kref_put(&nport->ref, nport->release);
+}
+
+struct efc_nport *
+efc_nport_find(struct efc_domain *domain, u32 d_id)
+{
+	struct efc_nport *nport;
+
+	/* Find a nport object, given an FC_ID */
+	nport = xa_load(&domain->lookup, d_id);
+	if (!nport || !kref_get_unless_zero(&nport->ref))
+		return NULL;
+
+	return nport;
+}
+
+int
+efc_nport_attach(struct efc_nport *nport, u32 fc_id)
+{
+	int rc;
+	struct efc_node *node;
+	struct efc *efc = nport->efc;
+	unsigned long index;
+
+	/* Set our lookup */
+	rc = xa_err(xa_store(&nport->domain->lookup, fc_id, nport, GFP_ATOMIC));
+	if (rc) {
+		efc_log_err(efc, "Sport lookup store failed: %d\n", rc);
+		return rc;
+	}
+
+	/* Update our display_name */
+	efc_node_fcid_display(fc_id, nport->display_name,
+			      sizeof(nport->display_name));
+
+	xa_for_each(&nport->lookup, index, node) {
+		efc_node_update_display_name(node);
+	}
+
+	efc_log_debug(nport->efc, "[%s] attach nport: fc_id x%06x\n",
+		      nport->display_name, fc_id);
+
+	/* Register a nport, given an FC_ID */
+	rc = efc_cmd_nport_attach(efc, nport, fc_id);
+	if (rc < 0) {
+		efc_log_err(nport->efc,
+			    "efc_hw_port_attach failed: %d\n", rc);
+		return -EIO;
+	}
+	return 0;
+}
+
+static void
+efc_nport_shutdown(struct efc_nport *nport)
+{
+	struct efc *efc = nport->efc;
+	struct efc_node *node;
+	unsigned long index;
+
+	xa_for_each(&nport->lookup, index, node) {
+		if (!(node->rnode.fc_id == FC_FID_FLOGI && nport->is_vport)) {
+			efc_node_post_event(node, EFC_EVT_SHUTDOWN, NULL);
+			continue;
+		}
+
+		/*
+		 * If this is a vport, logout of the fabric
+		 * controller so that it deletes the vport
+		 * on the switch.
+		 */
+		/* if link is down, don't send logo */
+		if (efc->link_status == EFC_LINK_STATUS_DOWN) {
+			efc_node_post_event(node, EFC_EVT_SHUTDOWN, NULL);
+			continue;
+		}
+
+		efc_log_debug(efc, "[%s] nport shutdown vport, send logo\n",
+			      node->display_name);
+
+		if (!efc_send_logo(node)) {
+			/* sent LOGO, wait for response */
+			efc_node_transition(node, __efc_d_wait_logo_rsp, NULL);
+			continue;
+		}
+
+		/*
+		 * failed to send LOGO,
+		 * go ahead and cleanup node anyways
+		 */
+		node_printf(node, "Failed to send LOGO\n");
+		efc_node_post_event(node, EFC_EVT_SHUTDOWN_EXPLICIT_LOGO, NULL);
+	}
+}
+
+static void
+efc_vport_link_down(struct efc_nport *nport)
+{
+	struct efc *efc = nport->efc;
+	struct efc_vport *vport;
+
+	/* Clear the nport reference in the vport specification */
+	list_for_each_entry(vport, &efc->vport_list, list_entry) {
+		if (vport->nport == nport) {
+			kref_put(&nport->ref, nport->release);
+			vport->nport = NULL;
+			break;
+		}
+	}
+}
+
+static void
+__efc_nport_common(const char *funcname, struct efc_sm_ctx *ctx,
+		   enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc_domain *domain = nport->domain;
+	struct efc *efc = nport->efc;
+
+	switch (evt) {
+	case EFC_EVT_ENTER:
+	case EFC_EVT_REENTER:
+	case EFC_EVT_EXIT:
+	case EFC_EVT_ALL_CHILD_NODES_FREE:
+		break;
+	case EFC_EVT_NPORT_ATTACH_OK:
+			efc_sm_transition(ctx, __efc_nport_attached, NULL);
+		break;
+	case EFC_EVT_SHUTDOWN:
+		/* Flag this nport as shutting down */
+		nport->shutting_down = true;
+
+		if (nport->is_vport)
+			efc_vport_link_down(nport);
+
+		if (xa_empty(&nport->lookup)) {
+			/* Remove the nport from the domain's lookup table */
+			xa_erase(&domain->lookup, nport->fc_id);
+			efc_sm_transition(ctx, __efc_nport_wait_port_free,
+					  NULL);
+			if (efc_cmd_nport_free(efc, nport)) {
+				efc_log_debug(nport->efc,
+					      "efc_hw_port_free failed\n");
+				/* Not much we can do, free the nport anyways */
+				efc_nport_free(nport);
+			}
+		} else {
+			/* sm: node list is not empty / shutdown nodes */
+			efc_sm_transition(ctx,
+					  __efc_nport_wait_shutdown, NULL);
+			efc_nport_shutdown(nport);
+		}
+		break;
+	default:
+		efc_log_debug(nport->efc, "[%s] %-20s %-20s not handled\n",
+			      nport->display_name, funcname,
+			      efc_sm_event_name(evt));
+	}
+}
+
+void
+__efc_nport_allocated(struct efc_sm_ctx *ctx,
+		      enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc_domain *domain = nport->domain;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	/* the physical nport is attached */
+	case EFC_EVT_NPORT_ATTACH_OK:
+		WARN_ON(nport != domain->nport);
+		efc_sm_transition(ctx, __efc_nport_attached, NULL);
+		break;
+
+	case EFC_EVT_NPORT_ALLOC_OK:
+		/* ignore */
+		break;
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+void
+__efc_nport_vport_init(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc *efc = nport->efc;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	case EFC_EVT_ENTER: {
+		__be64 be_wwpn = cpu_to_be64(nport->wwpn);
+
+		if (nport->wwpn == 0)
+			efc_log_debug(efc, "vport: letting f/w select WWN\n");
+
+		if (nport->fc_id != U32_MAX) {
+			efc_log_debug(efc, "vport: hard coding port id: %x\n",
+				      nport->fc_id);
+		}
+
+		efc_sm_transition(ctx, __efc_nport_vport_wait_alloc, NULL);
+		/* If wwpn is zero, then we'll let the f/w assign wwpn*/
+		if (efc_cmd_nport_alloc(efc, nport, nport->domain,
+					nport->wwpn == 0 ? NULL :
+					(uint8_t *)&be_wwpn)) {
+			efc_log_err(efc, "Can't allocate port\n");
+			break;
+		}
+
+		break;
+	}
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+void
+__efc_nport_vport_wait_alloc(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc *efc = nport->efc;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	case EFC_EVT_NPORT_ALLOC_OK: {
+		struct fc_els_flogi *sp;
+
+		sp = (struct fc_els_flogi *)nport->service_params;
+
+		if (nport->wwnn == 0) {
+			nport->wwnn = be64_to_cpu(nport->sli_wwnn);
+			nport->wwpn = be64_to_cpu(nport->sli_wwpn);
+			snprintf(nport->wwnn_str, sizeof(nport->wwnn_str),
+				 "%016llX", nport->wwpn);
+		}
+
+		/* Update the nport's service parameters */
+		sp->fl_wwpn = cpu_to_be64(nport->wwpn);
+		sp->fl_wwnn = cpu_to_be64(nport->wwnn);
+
+		/*
+		 * if nport->fc_id is uninitialized,
+		 * then request that the fabric node use FDISC
+		 * to find an fc_id.
+		 * Otherwise we're restoring vports, or we're in
+		 * fabric emulation mode, so attach the fc_id
+		 */
+		if (nport->fc_id == U32_MAX) {
+			struct efc_node *fabric;
+
+			fabric = efc_node_alloc(nport, FC_FID_FLOGI, false,
+						false);
+			if (!fabric) {
+				efc_log_err(efc, "efc_node_alloc() failed\n");
+				return;
+			}
+			efc_node_transition(fabric, __efc_vport_fabric_init,
+					    NULL);
+		} else {
+			snprintf(nport->wwnn_str, sizeof(nport->wwnn_str),
+				 "%016llX", nport->wwpn);
+			efc_nport_attach(nport, nport->fc_id);
+		}
+		efc_sm_transition(ctx, __efc_nport_vport_allocated, NULL);
+		break;
+	}
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+void
+__efc_nport_vport_allocated(struct efc_sm_ctx *ctx,
+			    enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc *efc = nport->efc;
+
+	nport_sm_trace(nport);
+
+	/*
+	 * This state is entered after the nport is allocated;
+	 * it then waits for a fabric node
+	 * FDISC to complete, which requests a nport attach.
+	 * The nport attach complete is handled in this state.
+	 */
+	switch (evt) {
+	case EFC_EVT_NPORT_ATTACH_OK: {
+		struct efc_node *node;
+
+		/* Find our fabric node, and forward this event */
+		node = efc_node_find(nport, FC_FID_FLOGI);
+		if (!node) {
+			efc_log_debug(efc, "can't find node %06x\n", FC_FID_FLOGI);
+			break;
+		}
+		/* sm: / forward nport attach to fabric node */
+		efc_node_post_event(node, evt, NULL);
+		efc_sm_transition(ctx, __efc_nport_attached, NULL);
+		break;
+	}
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+static void
+efc_vport_update_spec(struct efc_nport *nport)
+{
+	struct efc *efc = nport->efc;
+	struct efc_vport *vport;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&efc->vport_lock, flags);
+	list_for_each_entry(vport, &efc->vport_list, list_entry) {
+		if (vport->nport == nport) {
+			vport->wwnn = nport->wwnn;
+			vport->wwpn = nport->wwpn;
+			vport->tgt_data = nport->tgt_data;
+			vport->ini_data = nport->ini_data;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&efc->vport_lock, flags);
+}
+
+void
+__efc_nport_attached(struct efc_sm_ctx *ctx,
+		     enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc *efc = nport->efc;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	case EFC_EVT_ENTER: {
+		struct efc_node *node;
+		unsigned long index;
+
+		efc_log_debug(efc,
+			      "[%s] NPORT attached WWPN %016llX WWNN %016llX\n",
+			      nport->display_name,
+			      nport->wwpn, nport->wwnn);
+
+		xa_for_each(&nport->lookup, index, node)
+			efc_node_update_display_name(node);
+
+		efc->tt.new_nport(efc, nport);
+
+		/*
+		 * Update the vport (if its not the physical nport)
+		 * parameters
+		 */
+		if (nport->is_vport)
+			efc_vport_update_spec(nport);
+		break;
+	}
+
+	case EFC_EVT_EXIT:
+		efc_log_debug(efc,
+			      "[%s] NPORT deattached WWPN %016llX WWNN %016llX\n",
+			      nport->display_name,
+			      nport->wwpn, nport->wwnn);
+
+		efc->tt.del_nport(efc, nport);
+		break;
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+void
+__efc_nport_wait_shutdown(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+	struct efc_domain *domain = nport->domain;
+	struct efc *efc = nport->efc;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	case EFC_EVT_NPORT_ALLOC_OK:
+	case EFC_EVT_NPORT_ALLOC_FAIL:
+	case EFC_EVT_NPORT_ATTACH_OK:
+	case EFC_EVT_NPORT_ATTACH_FAIL:
+		/* ignore these events - just wait for the all free event */
+		break;
+
+	case EFC_EVT_ALL_CHILD_NODES_FREE: {
+		/*
+		 * Remove the nport from the domain's
+		 * sparse vector lookup table
+		 */
+		xa_erase(&domain->lookup, nport->fc_id);
+		efc_sm_transition(ctx, __efc_nport_wait_port_free, NULL);
+		if (efc_cmd_nport_free(efc, nport)) {
+			efc_log_err(nport->efc, "efc_hw_port_free failed\n");
+			/* Not much we can do, free the nport anyways */
+			efc_nport_free(nport);
+		}
+		break;
+	}
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+void
+__efc_nport_wait_port_free(struct efc_sm_ctx *ctx,
+			   enum efc_sm_event evt, void *arg)
+{
+	struct efc_nport *nport = ctx->app;
+
+	nport_sm_trace(nport);
+
+	switch (evt) {
+	case EFC_EVT_NPORT_ATTACH_OK:
+		/* Ignore as we are waiting for the free CB */
+		break;
+	case EFC_EVT_NPORT_FREE_OK: {
+		/* All done, free myself */
+		efc_nport_free(nport);
+		break;
+	}
+	default:
+		__efc_nport_common(__func__, ctx, evt, arg);
+	}
+}
+
+static int
+efc_vport_nport_alloc(struct efc_domain *domain, struct efc_vport *vport)
+{
+	struct efc_nport *nport;
+
+	lockdep_assert_held(&domain->efc->lock);
+
+	nport = efc_nport_alloc(domain, vport->wwpn, vport->wwnn, vport->fc_id,
+				vport->enable_ini, vport->enable_tgt);
+	vport->nport = nport;
+	if (!nport)
+		return -EIO;
+
+	kref_get(&nport->ref);
+	nport->is_vport = true;
+	nport->tgt_data = vport->tgt_data;
+	nport->ini_data = vport->ini_data;
+
+	efc_sm_transition(&nport->sm, __efc_nport_vport_init, NULL);
+
+	return 0;
+}
+
+int
+efc_vport_start(struct efc_domain *domain)
+{
+	struct efc *efc = domain->efc;
+	struct efc_vport *vport;
+	struct efc_vport *next;
+	int rc = 0;
+	unsigned long flags = 0;
+
+	/* Use the vport spec to find the associated vports and start them */
+	spin_lock_irqsave(&efc->vport_lock, flags);
+	list_for_each_entry_safe(vport, next, &efc->vport_list, list_entry) {
+		if (!vport->nport) {
+			if (efc_vport_nport_alloc(domain, vport))
+				rc = -EIO;
+		}
+	}
+	spin_unlock_irqrestore(&efc->vport_lock, flags);
+
+	return rc;
+}
+
+int
+efc_nport_vport_new(struct efc_domain *domain, uint64_t wwpn, uint64_t wwnn,
+		    u32 fc_id, bool ini, bool tgt, void *tgt_data,
+		    void *ini_data)
+{
+	struct efc *efc = domain->efc;
+	struct efc_vport *vport;
+	int rc = 0;
+	unsigned long flags = 0;
+
+	if (ini && domain->efc->enable_ini == 0) {
+		efc_log_debug(efc, "driver initiator mode not enabled\n");
+		return -EIO;
+	}
+
+	if (tgt && domain->efc->enable_tgt == 0) {
+		efc_log_debug(efc, "driver target mode not enabled\n");
+		return -EIO;
+	}
+
+	/*
+	 * Create a vport spec if we need to recreate
+	 * this vport after a link up event
+	 */
+	vport = efc_vport_create_spec(domain->efc, wwnn, wwpn, fc_id, ini, tgt,
+				      tgt_data, ini_data);
+	if (!vport) {
+		efc_log_err(efc, "failed to create vport object entry\n");
+		return -EIO;
+	}
+
+	spin_lock_irqsave(&efc->lock, flags);
+	rc = efc_vport_nport_alloc(domain, vport);
+	spin_unlock_irqrestore(&efc->lock, flags);
+
+	return rc;
+}
+
+int
+efc_nport_vport_del(struct efc *efc, struct efc_domain *domain,
+		    u64 wwpn, uint64_t wwnn)
+{
+	struct efc_nport *nport;
+	struct efc_vport *vport;
+	struct efc_vport *next;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&efc->vport_lock, flags);
+	/* walk the efc_vport_list and remove from there */
+	list_for_each_entry_safe(vport, next, &efc->vport_list, list_entry) {
+		if (vport->wwpn == wwpn && vport->wwnn == wwnn) {
+			list_del(&vport->list_entry);
+			kfree(vport);
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&efc->vport_lock, flags);
+
+	if (!domain) {
+		/* No domain means no nport to look for */
+		return 0;
+	}
+
+	spin_lock_irqsave(&efc->lock, flags);
+	list_for_each_entry(nport, &domain->nport_list, list_entry) {
+		if (nport->wwpn == wwpn && nport->wwnn == wwnn) {
+			/* Shutdown this NPORT */
+			efc_sm_post_event(&nport->sm, EFC_EVT_SHUTDOWN, NULL);
+			kref_put(&nport->ref, nport->release);
+			break;
+		}
+	}
+
+	spin_unlock_irqrestore(&efc->lock, flags);
+	return 0;
+}
+
+void
+efc_vport_del_all(struct efc *efc)
+{
+	struct efc_vport *vport;
+	struct efc_vport *next;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&efc->vport_lock, flags);
+	list_for_each_entry_safe(vport, next, &efc->vport_list, list_entry) {
+		list_del(&vport->list_entry);
+		kfree(vport);
+	}
+	spin_unlock_irqrestore(&efc->vport_lock, flags);
+}
+
+struct efc_vport *
+efc_vport_create_spec(struct efc *efc, uint64_t wwnn, uint64_t wwpn,
+		      u32 fc_id, bool enable_ini,
+		      bool enable_tgt, void *tgt_data, void *ini_data)
+{
+	struct efc_vport *vport;
+	unsigned long flags = 0;
+
+	/*
+	 * walk the efc_vport_list and return failure
+	 * if a valid(vport with non zero WWPN and WWNN) vport entry
+	 * is already created
+	 */
+	spin_lock_irqsave(&efc->vport_lock, flags);
+	list_for_each_entry(vport, &efc->vport_list, list_entry) {
+		if ((wwpn && vport->wwpn == wwpn) &&
+		    (wwnn && vport->wwnn == wwnn)) {
+			efc_log_err(efc,
+				    "VPORT %016llX %016llX already allocated\n",
+				    wwnn, wwpn);
+			spin_unlock_irqrestore(&efc->vport_lock, flags);
+			return NULL;
+		}
+	}
+
+	vport = kzalloc_obj(*vport, GFP_ATOMIC);
+	if (!vport) {
+		spin_unlock_irqrestore(&efc->vport_lock, flags);
+		return NULL;
+	}
+
+	vport->wwnn = wwnn;
+	vport->wwpn = wwpn;
+	vport->fc_id = fc_id;
+	vport->enable_tgt = enable_tgt;
+	vport->enable_ini = enable_ini;
+	vport->tgt_data = tgt_data;
+	vport->ini_data = ini_data;
+
+	INIT_LIST_HEAD(&vport->list_entry);
+	list_add_tail(&vport->list_entry, &efc->vport_list);
+	spin_unlock_irqrestore(&efc->vport_lock, flags);
+	return vport;
+}

linux-7.2.3/drivers/scsi/elx/libefc/efc_nport.h

@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/**
+ * EFC FC port (NPORT) exported declarations
+ *
+ */
+
+#ifndef __EFC_NPORT_H__
+#define __EFC_NPORT_H__
+
+struct efc_nport *
+efc_nport_find(struct efc_domain *domain, u32 d_id);
+struct efc_nport *
+efc_nport_alloc(struct efc_domain *domain, uint64_t wwpn, uint64_t wwnn,
+		u32 fc_id, bool enable_ini, bool enable_tgt);
+void
+efc_nport_free(struct efc_nport *nport);
+int
+efc_nport_attach(struct efc_nport *nport, u32 fc_id);
+
+void
+__efc_nport_allocated(struct efc_sm_ctx *ctx,
+		      enum efc_sm_event evt, void *arg);
+void
+__efc_nport_wait_shutdown(struct efc_sm_ctx *ctx,
+			  enum efc_sm_event evt, void *arg);
+void
+__efc_nport_wait_port_free(struct efc_sm_ctx *ctx,
+			   enum efc_sm_event evt, void *arg);
+void
+__efc_nport_vport_init(struct efc_sm_ctx *ctx,
+		       enum efc_sm_event evt, void *arg);
+void
+__efc_nport_vport_wait_alloc(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+void
+__efc_nport_vport_allocated(struct efc_sm_ctx *ctx,
+			    enum efc_sm_event evt, void *arg);
+void
+__efc_nport_attached(struct efc_sm_ctx *ctx,
+		     enum efc_sm_event evt, void *arg);
+
+int
+efc_vport_start(struct efc_domain *domain);
+
+#endif /* __EFC_NPORT_H__ */

linux-7.2.3/drivers/scsi/elx/libefc/efc_sm.c

@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * Generic state machine framework.
+ */
+#include "efc.h"
+#include "efc_sm.h"
+
+/**
+ * efc_sm_post_event() - Post an event to a context.
+ *
+ * @ctx: State machine context
+ * @evt: Event to post
+ * @data: Event-specific data (if any)
+ */
+int
+efc_sm_post_event(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *data)
+{
+	if (!ctx->current_state)
+		return -EIO;
+
+	ctx->current_state(ctx, evt, data);
+	return 0;
+}
+
+void
+efc_sm_transition(struct efc_sm_ctx *ctx,
+		  void (*state)(struct efc_sm_ctx *,
+				enum efc_sm_event, void *), void *data)
+
+{
+	if (ctx->current_state == state) {
+		efc_sm_post_event(ctx, EFC_EVT_REENTER, data);
+	} else {
+		efc_sm_post_event(ctx, EFC_EVT_EXIT, data);
+		ctx->current_state = state;
+		efc_sm_post_event(ctx, EFC_EVT_ENTER, data);
+	}
+}
+
+static char *event_name[] = EFC_SM_EVENT_NAME;
+
+const char *efc_sm_event_name(enum efc_sm_event evt)
+{
+	if (evt > EFC_EVT_LAST)
+		return "unknown";
+
+	return event_name[evt];
+}

linux-7.2.3/drivers/scsi/elx/libefc/efc_sm.h

@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ *
+ */
+
+/**
+ * Generic state machine framework declarations.
+ */
+
+#ifndef _EFC_SM_H
+#define _EFC_SM_H
+
+struct efc_sm_ctx;
+
+/* State Machine events */
+enum efc_sm_event {
+	/* Common Events */
+	EFC_EVT_ENTER,
+	EFC_EVT_REENTER,
+	EFC_EVT_EXIT,
+	EFC_EVT_SHUTDOWN,
+	EFC_EVT_ALL_CHILD_NODES_FREE,
+	EFC_EVT_RESUME,
+	EFC_EVT_TIMER_EXPIRED,
+
+	/* Domain Events */
+	EFC_EVT_RESPONSE,
+	EFC_EVT_ERROR,
+
+	EFC_EVT_DOMAIN_FOUND,
+	EFC_EVT_DOMAIN_ALLOC_OK,
+	EFC_EVT_DOMAIN_ALLOC_FAIL,
+	EFC_EVT_DOMAIN_REQ_ATTACH,
+	EFC_EVT_DOMAIN_ATTACH_OK,
+	EFC_EVT_DOMAIN_ATTACH_FAIL,
+	EFC_EVT_DOMAIN_LOST,
+	EFC_EVT_DOMAIN_FREE_OK,
+	EFC_EVT_DOMAIN_FREE_FAIL,
+	EFC_EVT_HW_DOMAIN_REQ_ATTACH,
+	EFC_EVT_HW_DOMAIN_REQ_FREE,
+
+	/* Sport Events */
+	EFC_EVT_NPORT_ALLOC_OK,
+	EFC_EVT_NPORT_ALLOC_FAIL,
+	EFC_EVT_NPORT_ATTACH_OK,
+	EFC_EVT_NPORT_ATTACH_FAIL,
+	EFC_EVT_NPORT_FREE_OK,
+	EFC_EVT_NPORT_FREE_FAIL,
+	EFC_EVT_NPORT_TOPOLOGY_NOTIFY,
+	EFC_EVT_HW_PORT_ALLOC_OK,
+	EFC_EVT_HW_PORT_ALLOC_FAIL,
+	EFC_EVT_HW_PORT_ATTACH_OK,
+	EFC_EVT_HW_PORT_REQ_ATTACH,
+	EFC_EVT_HW_PORT_REQ_FREE,
+	EFC_EVT_HW_PORT_FREE_OK,
+
+	/* Login Events */
+	EFC_EVT_SRRS_ELS_REQ_OK,
+	EFC_EVT_SRRS_ELS_CMPL_OK,
+	EFC_EVT_SRRS_ELS_REQ_FAIL,
+	EFC_EVT_SRRS_ELS_CMPL_FAIL,
+	EFC_EVT_SRRS_ELS_REQ_RJT,
+	EFC_EVT_NODE_ATTACH_OK,
+	EFC_EVT_NODE_ATTACH_FAIL,
+	EFC_EVT_NODE_FREE_OK,
+	EFC_EVT_NODE_FREE_FAIL,
+	EFC_EVT_ELS_FRAME,
+	EFC_EVT_ELS_REQ_TIMEOUT,
+	EFC_EVT_ELS_REQ_ABORTED,
+	/* request an ELS IO be aborted */
+	EFC_EVT_ABORT_ELS,
+	/* ELS abort process complete */
+	EFC_EVT_ELS_ABORT_CMPL,
+
+	EFC_EVT_ABTS_RCVD,
+
+	/* node is not in the GID_PT payload */
+	EFC_EVT_NODE_MISSING,
+	/* node is allocated and in the GID_PT payload */
+	EFC_EVT_NODE_REFOUND,
+	/* node shutting down due to PLOGI recvd (implicit logo) */
+	EFC_EVT_SHUTDOWN_IMPLICIT_LOGO,
+	/* node shutting down due to LOGO recvd/sent (explicit logo) */
+	EFC_EVT_SHUTDOWN_EXPLICIT_LOGO,
+
+	EFC_EVT_PLOGI_RCVD,
+	EFC_EVT_FLOGI_RCVD,
+	EFC_EVT_LOGO_RCVD,
+	EFC_EVT_PRLI_RCVD,
+	EFC_EVT_PRLO_RCVD,
+	EFC_EVT_PDISC_RCVD,
+	EFC_EVT_FDISC_RCVD,
+	EFC_EVT_ADISC_RCVD,
+	EFC_EVT_RSCN_RCVD,
+	EFC_EVT_SCR_RCVD,
+	EFC_EVT_ELS_RCVD,
+
+	EFC_EVT_FCP_CMD_RCVD,
+
+	EFC_EVT_GIDPT_DELAY_EXPIRED,
+
+	/* SCSI Target Server events */
+	EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY,
+	EFC_EVT_NODE_DEL_INI_COMPLETE,
+	EFC_EVT_NODE_DEL_TGT_COMPLETE,
+	EFC_EVT_NODE_SESS_REG_OK,
+	EFC_EVT_NODE_SESS_REG_FAIL,
+
+	/* Must be last */
+	EFC_EVT_LAST
+};
+
+/* State Machine event name lookup array */
+#define EFC_SM_EVENT_NAME {						\
+	[EFC_EVT_ENTER]			= "EFC_EVT_ENTER",		\
+	[EFC_EVT_REENTER]		= "EFC_EVT_REENTER",		\
+	[EFC_EVT_EXIT]			= "EFC_EVT_EXIT",		\
+	[EFC_EVT_SHUTDOWN]		= "EFC_EVT_SHUTDOWN",		\
+	[EFC_EVT_ALL_CHILD_NODES_FREE]	= "EFC_EVT_ALL_CHILD_NODES_FREE",\
+	[EFC_EVT_RESUME]		= "EFC_EVT_RESUME",		\
+	[EFC_EVT_TIMER_EXPIRED]		= "EFC_EVT_TIMER_EXPIRED",	\
+	[EFC_EVT_RESPONSE]		= "EFC_EVT_RESPONSE",		\
+	[EFC_EVT_ERROR]			= "EFC_EVT_ERROR",		\
+	[EFC_EVT_DOMAIN_FOUND]		= "EFC_EVT_DOMAIN_FOUND",	\
+	[EFC_EVT_DOMAIN_ALLOC_OK]	= "EFC_EVT_DOMAIN_ALLOC_OK",	\
+	[EFC_EVT_DOMAIN_ALLOC_FAIL]	= "EFC_EVT_DOMAIN_ALLOC_FAIL",	\
+	[EFC_EVT_DOMAIN_REQ_ATTACH]	= "EFC_EVT_DOMAIN_REQ_ATTACH",	\
+	[EFC_EVT_DOMAIN_ATTACH_OK]	= "EFC_EVT_DOMAIN_ATTACH_OK",	\
+	[EFC_EVT_DOMAIN_ATTACH_FAIL]	= "EFC_EVT_DOMAIN_ATTACH_FAIL",	\
+	[EFC_EVT_DOMAIN_LOST]		= "EFC_EVT_DOMAIN_LOST",	\
+	[EFC_EVT_DOMAIN_FREE_OK]	= "EFC_EVT_DOMAIN_FREE_OK",	\
+	[EFC_EVT_DOMAIN_FREE_FAIL]	= "EFC_EVT_DOMAIN_FREE_FAIL",	\
+	[EFC_EVT_HW_DOMAIN_REQ_ATTACH]	= "EFC_EVT_HW_DOMAIN_REQ_ATTACH",\
+	[EFC_EVT_HW_DOMAIN_REQ_FREE]	= "EFC_EVT_HW_DOMAIN_REQ_FREE",	\
+	[EFC_EVT_NPORT_ALLOC_OK]	= "EFC_EVT_NPORT_ALLOC_OK",	\
+	[EFC_EVT_NPORT_ALLOC_FAIL]	= "EFC_EVT_NPORT_ALLOC_FAIL",	\
+	[EFC_EVT_NPORT_ATTACH_OK]	= "EFC_EVT_NPORT_ATTACH_OK",	\
+	[EFC_EVT_NPORT_ATTACH_FAIL]	= "EFC_EVT_NPORT_ATTACH_FAIL",	\
+	[EFC_EVT_NPORT_FREE_OK]		= "EFC_EVT_NPORT_FREE_OK",	\
+	[EFC_EVT_NPORT_FREE_FAIL]	= "EFC_EVT_NPORT_FREE_FAIL",	\
+	[EFC_EVT_NPORT_TOPOLOGY_NOTIFY]	= "EFC_EVT_NPORT_TOPOLOGY_NOTIFY",\
+	[EFC_EVT_HW_PORT_ALLOC_OK]	= "EFC_EVT_HW_PORT_ALLOC_OK",	\
+	[EFC_EVT_HW_PORT_ALLOC_FAIL]	= "EFC_EVT_HW_PORT_ALLOC_FAIL",	\
+	[EFC_EVT_HW_PORT_ATTACH_OK]	= "EFC_EVT_HW_PORT_ATTACH_OK",	\
+	[EFC_EVT_HW_PORT_REQ_ATTACH]	= "EFC_EVT_HW_PORT_REQ_ATTACH",	\
+	[EFC_EVT_HW_PORT_REQ_FREE]	= "EFC_EVT_HW_PORT_REQ_FREE",	\
+	[EFC_EVT_HW_PORT_FREE_OK]	= "EFC_EVT_HW_PORT_FREE_OK",	\
+	[EFC_EVT_SRRS_ELS_REQ_OK]	= "EFC_EVT_SRRS_ELS_REQ_OK",	\
+	[EFC_EVT_SRRS_ELS_CMPL_OK]	= "EFC_EVT_SRRS_ELS_CMPL_OK",	\
+	[EFC_EVT_SRRS_ELS_REQ_FAIL]	= "EFC_EVT_SRRS_ELS_REQ_FAIL",	\
+	[EFC_EVT_SRRS_ELS_CMPL_FAIL]	= "EFC_EVT_SRRS_ELS_CMPL_FAIL",	\
+	[EFC_EVT_SRRS_ELS_REQ_RJT]	= "EFC_EVT_SRRS_ELS_REQ_RJT",	\
+	[EFC_EVT_NODE_ATTACH_OK]	= "EFC_EVT_NODE_ATTACH_OK",	\
+	[EFC_EVT_NODE_ATTACH_FAIL]	= "EFC_EVT_NODE_ATTACH_FAIL",	\
+	[EFC_EVT_NODE_FREE_OK]		= "EFC_EVT_NODE_FREE_OK",	\
+	[EFC_EVT_NODE_FREE_FAIL]	= "EFC_EVT_NODE_FREE_FAIL",	\
+	[EFC_EVT_ELS_FRAME]		= "EFC_EVT_ELS_FRAME",		\
+	[EFC_EVT_ELS_REQ_TIMEOUT]	= "EFC_EVT_ELS_REQ_TIMEOUT",	\
+	[EFC_EVT_ELS_REQ_ABORTED]	= "EFC_EVT_ELS_REQ_ABORTED",	\
+	[EFC_EVT_ABORT_ELS]		= "EFC_EVT_ABORT_ELS",		\
+	[EFC_EVT_ELS_ABORT_CMPL]	= "EFC_EVT_ELS_ABORT_CMPL",	\
+	[EFC_EVT_ABTS_RCVD]		= "EFC_EVT_ABTS_RCVD",		\
+	[EFC_EVT_NODE_MISSING]		= "EFC_EVT_NODE_MISSING",	\
+	[EFC_EVT_NODE_REFOUND]		= "EFC_EVT_NODE_REFOUND",	\
+	[EFC_EVT_SHUTDOWN_IMPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_IMPLICIT_LOGO",\
+	[EFC_EVT_SHUTDOWN_EXPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_EXPLICIT_LOGO",\
+	[EFC_EVT_PLOGI_RCVD]		= "EFC_EVT_PLOGI_RCVD",		\
+	[EFC_EVT_FLOGI_RCVD]		= "EFC_EVT_FLOGI_RCVD",		\
+	[EFC_EVT_LOGO_RCVD]		= "EFC_EVT_LOGO_RCVD",		\
+	[EFC_EVT_PRLI_RCVD]		= "EFC_EVT_PRLI_RCVD",		\
+	[EFC_EVT_PRLO_RCVD]		= "EFC_EVT_PRLO_RCVD",		\
+	[EFC_EVT_PDISC_RCVD]		= "EFC_EVT_PDISC_RCVD",		\
+	[EFC_EVT_FDISC_RCVD]		= "EFC_EVT_FDISC_RCVD",		\
+	[EFC_EVT_ADISC_RCVD]		= "EFC_EVT_ADISC_RCVD",		\
+	[EFC_EVT_RSCN_RCVD]		= "EFC_EVT_RSCN_RCVD",		\
+	[EFC_EVT_SCR_RCVD]		= "EFC_EVT_SCR_RCVD",		\
+	[EFC_EVT_ELS_RCVD]		= "EFC_EVT_ELS_RCVD",		\
+	[EFC_EVT_FCP_CMD_RCVD]		= "EFC_EVT_FCP_CMD_RCVD",	\
+	[EFC_EVT_NODE_DEL_INI_COMPLETE]	= "EFC_EVT_NODE_DEL_INI_COMPLETE",\
+	[EFC_EVT_NODE_DEL_TGT_COMPLETE]	= "EFC_EVT_NODE_DEL_TGT_COMPLETE",\
+	[EFC_EVT_LAST]			= "EFC_EVT_LAST",		\
+}
+
+int
+efc_sm_post_event(struct efc_sm_ctx *ctx,
+		  enum efc_sm_event evt, void *data);
+void
+efc_sm_transition(struct efc_sm_ctx *ctx,
+		  void (*state)(struct efc_sm_ctx *ctx,
+				enum efc_sm_event evt, void *arg),
+		  void *data);
+void efc_sm_disable(struct efc_sm_ctx *ctx);
+const char *efc_sm_event_name(enum efc_sm_event evt);
+
+#endif /* ! _EFC_SM_H */

linux-7.2.3/drivers/scsi/elx/libefc/efclib.c

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * LIBEFC LOCKING
+ *
+ * The critical sections protected by the efc's spinlock are quite broad and
+ * may be improved upon in the future. The libefc code and its locking doesn't
+ * influence the I/O path, so excessive locking doesn't impact I/O performance.
+ *
+ * The strategy is to lock whenever processing a request from user driver. This
+ * means that the entry points into the libefc library are protected by efc
+ * lock. So all the state machine transitions are protected.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include "efc.h"
+
+int efcport_init(struct efc *efc)
+{
+	u32 rc = 0;
+
+	spin_lock_init(&efc->lock);
+	INIT_LIST_HEAD(&efc->vport_list);
+	efc->hold_frames = false;
+	spin_lock_init(&efc->pend_frames_lock);
+	INIT_LIST_HEAD(&efc->pend_frames);
+
+	/* Create Node pool */
+	efc->node_pool = mempool_create_kmalloc_pool(EFC_MAX_REMOTE_NODES,
+						     sizeof(struct efc_node));
+	if (!efc->node_pool) {
+		efc_log_err(efc, "Can't allocate node pool\n");
+		return -ENOMEM;
+	}
+
+	efc->node_dma_pool = dma_pool_create("node_dma_pool", &efc->pci->dev,
+					     NODE_SPARAMS_SIZE, 0, 0);
+	if (!efc->node_dma_pool) {
+		efc_log_err(efc, "Can't allocate node dma pool\n");
+		mempool_destroy(efc->node_pool);
+		return -ENOMEM;
+	}
+
+	efc->els_io_pool = mempool_create_kmalloc_pool(EFC_ELS_IO_POOL_SZ,
+						sizeof(struct efc_els_io_req));
+	if (!efc->els_io_pool) {
+		efc_log_err(efc, "Can't allocate els io pool\n");
+		return -ENOMEM;
+	}
+
+	return rc;
+}
+
+static void
+efc_purge_pending(struct efc *efc)
+{
+	struct efc_hw_sequence *frame, *next;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&efc->pend_frames_lock, flags);
+
+	list_for_each_entry_safe(frame, next, &efc->pend_frames, list_entry) {
+		list_del(&frame->list_entry);
+		efc->tt.hw_seq_free(efc, frame);
+	}
+
+	spin_unlock_irqrestore(&efc->pend_frames_lock, flags);
+}
+
+void efcport_destroy(struct efc *efc)
+{
+	efc_purge_pending(efc);
+	mempool_destroy(efc->els_io_pool);
+	mempool_destroy(efc->node_pool);
+	dma_pool_destroy(efc->node_dma_pool);
+}

linux-7.2.3/drivers/scsi/elx/libefc/efclib.h

@@ -0,0 +1,623 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#ifndef __EFCLIB_H__
+#define __EFCLIB_H__
+
+#include "scsi/fc/fc_els.h"
+#include "scsi/fc/fc_fs.h"
+#include "scsi/fc/fc_ns.h"
+#include "scsi/fc/fc_gs.h"
+#include "scsi/fc_frame.h"
+#include "../include/efc_common.h"
+#include "../libefc_sli/sli4.h"
+
+#define EFC_SERVICE_PARMS_LENGTH	120
+#define EFC_NAME_LENGTH			32
+#define EFC_SM_NAME_LENGTH		64
+#define EFC_DISPLAY_BUS_INFO_LENGTH	16
+
+#define EFC_WWN_LENGTH			32
+
+#define EFC_FC_ELS_DEFAULT_RETRIES	3
+
+/* Timeouts */
+#define EFC_FC_ELS_SEND_DEFAULT_TIMEOUT	0
+#define EFC_FC_FLOGI_TIMEOUT_SEC	5
+#define EFC_SHUTDOWN_TIMEOUT_USEC	30000000
+
+/* Return values for calls from base driver to libefc */
+#define EFC_SCSI_CALL_COMPLETE		0
+#define EFC_SCSI_CALL_ASYNC		1
+
+/* Local port topology */
+enum efc_nport_topology {
+	EFC_NPORT_TOPO_UNKNOWN = 0,
+	EFC_NPORT_TOPO_FABRIC,
+	EFC_NPORT_TOPO_P2P,
+	EFC_NPORT_TOPO_FC_AL,
+};
+
+#define enable_target_rscn(efc)		1
+
+enum efc_node_shutd_rsn {
+	EFC_NODE_SHUTDOWN_DEFAULT = 0,
+	EFC_NODE_SHUTDOWN_EXPLICIT_LOGO,
+	EFC_NODE_SHUTDOWN_IMPLICIT_LOGO,
+};
+
+enum efc_node_send_ls_acc {
+	EFC_NODE_SEND_LS_ACC_NONE = 0,
+	EFC_NODE_SEND_LS_ACC_PLOGI,
+	EFC_NODE_SEND_LS_ACC_PRLI,
+};
+
+#define EFC_LINK_STATUS_UP		0
+#define EFC_LINK_STATUS_DOWN		1
+
+enum efc_sm_event;
+
+/* State machine context header  */
+struct efc_sm_ctx {
+	void (*current_state)(struct efc_sm_ctx *ctx,
+			      enum efc_sm_event evt, void *arg);
+
+	const char	*description;
+	void		*app;
+};
+
+/* Description of discovered Fabric Domain */
+struct efc_domain_record {
+	u32		index;
+	u32		priority;
+	u8		address[6];
+	u8		wwn[8];
+	union {
+		u8	vlan[512];
+		u8	loop[128];
+	} map;
+	u32		speed;
+	u32		fc_id;
+	bool		is_loop;
+	bool		is_nport;
+};
+
+/* Domain events */
+enum efc_hw_domain_event {
+	EFC_HW_DOMAIN_ALLOC_OK,
+	EFC_HW_DOMAIN_ALLOC_FAIL,
+	EFC_HW_DOMAIN_ATTACH_OK,
+	EFC_HW_DOMAIN_ATTACH_FAIL,
+	EFC_HW_DOMAIN_FREE_OK,
+	EFC_HW_DOMAIN_FREE_FAIL,
+	EFC_HW_DOMAIN_LOST,
+	EFC_HW_DOMAIN_FOUND,
+	EFC_HW_DOMAIN_CHANGED,
+};
+
+/**
+ * Fibre Channel port object
+ *
+ * @list_entry:		nport list entry
+ * @ref:		reference count, each node takes a reference
+ * @release:		function to free nport object
+ * @efc:		pointer back to efc
+ * @instance_index:	unique instance index value
+ * @display_name:	port display name
+ * @is_vport:		Is NPIV port
+ * @free_req_pending:	pending request to free resources
+ * @attached:		mark attached if reg VPI succeeds
+ * @p2p_winner:		TRUE if we're the point-to-point winner
+ * @domain:		pointer back to domain
+ * @wwpn:		port wwpn
+ * @wwnn:		port wwnn
+ * @tgt_data:		target backend private port data
+ * @ini_data:		initiator backend private port data
+ * @indicator:		VPI
+ * @fc_id:		port FC address
+ * @dma:		memory for Service Parameters
+ * @wwnn_str:		wwpn string
+ * @sli_wwpn:		SLI provided wwpn
+ * @sli_wwnn:		SLI provided wwnn
+ * @sm:			nport state machine context
+ * @lookup:		fc_id to node lookup object
+ * @enable_ini:		SCSI initiator enabled for this port
+ * @enable_tgt:		SCSI target enabled for this port
+ * @enable_rscn:	port will be expecting RSCN
+ * @shutting_down:	nport in process of shutting down
+ * @p2p_port_id:	our port id for point-to-point
+ * @topology:		topology: fabric/p2p/unknown
+ * @service_params:	login parameters
+ * @p2p_remote_port_id:	remote node's port id for point-to-point
+ */
+
+struct efc_nport {
+	struct list_head	list_entry;
+	struct kref		ref;
+	void			(*release)(struct kref *arg);
+	struct efc		*efc;
+	u32			instance_index;
+	char			display_name[EFC_NAME_LENGTH];
+	bool			is_vport;
+	bool			free_req_pending;
+	bool			attached;
+	bool			attaching;
+	bool			p2p_winner;
+	struct efc_domain	*domain;
+	u64			wwpn;
+	u64			wwnn;
+	void			*tgt_data;
+	void			*ini_data;
+
+	u32			indicator;
+	u32			fc_id;
+	struct efc_dma		dma;
+
+	u8			wwnn_str[EFC_WWN_LENGTH];
+	__be64			sli_wwpn;
+	__be64			sli_wwnn;
+
+	struct efc_sm_ctx	sm;
+	struct xarray		lookup;
+	bool			enable_ini;
+	bool			enable_tgt;
+	bool			enable_rscn;
+	bool			shutting_down;
+	u32			p2p_port_id;
+	enum efc_nport_topology topology;
+	u8			service_params[EFC_SERVICE_PARMS_LENGTH];
+	u32			p2p_remote_port_id;
+};
+
+/**
+ * Fibre Channel domain object
+ *
+ * This object is a container for the various SLI components needed
+ * to connect to the domain of a FC or FCoE switch
+ * @efc:		pointer back to efc
+ * @instance_index:	unique instance index value
+ * @display_name:	Node display name
+ * @nport_list:		linked list of nports associated with this domain
+ * @ref:		Reference count, each nport takes a reference
+ * @release:		Function to free domain object
+ * @ini_domain:		initiator backend private domain data
+ * @tgt_domain:		target backend private domain data
+ * @sm:			state machine context
+ * @fcf:		FC Forwarder table index
+ * @fcf_indicator:	FCFI
+ * @indicator:		VFI
+ * @nport_count:	Number of nports allocated
+ * @dma:		memory for Service Parameters
+ * @fcf_wwn:		WWN for FCF/switch
+ * @drvsm:		driver domain sm context
+ * @attached:		set true after attach completes
+ * @is_fc:		is FC
+ * @is_loop:		is loop topology
+ * @is_nlport:		is public loop
+ * @domain_found_pending:A domain found is pending, drec is updated
+ * @req_domain_free:	True if domain object should be free'd
+ * @req_accept_frames:	set in domain state machine to enable frames
+ * @domain_notify_pend:	Set in domain SM to avoid duplicate node event post
+ * @pending_drec:	Pending drec if a domain found is pending
+ * @service_params:	any nports service parameters
+ * @flogi_service_params:Fabric/P2p service parameters from FLOGI
+ * @lookup:		d_id to node lookup object
+ * @nport:		Pointer to first (physical) SLI port
+ */
+struct efc_domain {
+	struct efc		*efc;
+	char			display_name[EFC_NAME_LENGTH];
+	struct list_head	nport_list;
+	struct kref		ref;
+	void			(*release)(struct kref *arg);
+	void			*ini_domain;
+	void			*tgt_domain;
+
+	/* Declarations private to HW/SLI */
+	u32			fcf;
+	u32			fcf_indicator;
+	u32			indicator;
+	u32			nport_count;
+	struct efc_dma		dma;
+
+	/* Declarations private to FC trannport */
+	u64			fcf_wwn;
+	struct efc_sm_ctx	drvsm;
+	bool			attached;
+	bool			is_fc;
+	bool			is_loop;
+	bool			is_nlport;
+	bool			domain_found_pending;
+	bool			req_domain_free;
+	bool			req_accept_frames;
+	bool			domain_notify_pend;
+
+	struct efc_domain_record pending_drec;
+	u8			service_params[EFC_SERVICE_PARMS_LENGTH];
+	u8			flogi_service_params[EFC_SERVICE_PARMS_LENGTH];
+
+	struct xarray		lookup;
+
+	struct efc_nport	*nport;
+};
+
+/**
+ * Remote Node object
+ *
+ * This object represents a connection between the SLI port and another
+ * Nx_Port on the fabric. Note this can be either a well known port such
+ * as a F_Port (i.e. ff:ff:fe) or another N_Port.
+ * @indicator:		RPI
+ * @fc_id:		FC address
+ * @attached:		true if attached
+ * @nport:		associated SLI port
+ * @node:		associated node
+ */
+struct efc_remote_node {
+	u32			indicator;
+	u32			index;
+	u32			fc_id;
+
+	bool			attached;
+
+	struct efc_nport	*nport;
+	void			*node;
+};
+
+/**
+ * FC Node object
+ * @efc:		pointer back to efc structure
+ * @display_name:	Node display name
+ * @nort:		Assosiated nport pointer.
+ * @hold_frames:	hold incoming frames if true
+ * @els_io_enabled:	Enable allocating els ios for this node
+ * @els_ios_lock:	lock to protect the els ios list
+ * @els_ios_list:	ELS I/O's for this node
+ * @ini_node:		backend initiator private node data
+ * @tgt_node:		backend target private node data
+ * @rnode:		Remote node
+ * @sm:			state machine context
+ * @evtdepth:		current event posting nesting depth
+ * @req_free:		this node is to be free'd
+ * @attached:		node is attached (REGLOGIN complete)
+ * @fcp_enabled:	node is enabled to handle FCP
+ * @rscn_pending:	for name server node RSCN is pending
+ * @send_plogi:		send PLOGI accept, upon completion of node attach
+ * @send_plogi_acc:	TRUE if io_alloc() is enabled.
+ * @send_ls_acc:	type of LS acc to send
+ * @ls_acc_io:		SCSI IO for LS acc
+ * @ls_acc_oxid:	OX_ID for pending accept
+ * @ls_acc_did:		D_ID for pending accept
+ * @shutdown_reason:	reason for node shutdown
+ * @sparm_dma_buf:	service parameters buffer
+ * @service_params:	plogi/acc frame from remote device
+ * @pend_frames_lock:	lock for inbound pending frames list
+ * @pend_frames:	inbound pending frames list
+ * @pend_frames_processed:count of frames processed in hold frames interval
+ * @ox_id_in_use:	used to verify one at a time us of ox_id
+ * @els_retries_remaining:for ELS, number of retries remaining
+ * @els_req_cnt:	number of outstanding ELS requests
+ * @els_cmpl_cnt:	number of outstanding ELS completions
+ * @abort_cnt:		Abort counter for debugging purpos
+ * @current_state_name:	current node state
+ * @prev_state_name:	previous node state
+ * @current_evt:	current event
+ * @prev_evt:		previous event
+ * @targ:		node is target capable
+ * @init:		node is init capable
+ * @refound:		Handle node refound case when node is being deleted
+ * @els_io_pend_list:	list of pending (not yet processed) ELS IOs
+ * @els_io_active_list:	list of active (processed) ELS IOs
+ * @nodedb_state:	Node debugging, saved state
+ * @gidpt_delay_timer:	GIDPT delay timer
+ * @time_last_gidpt_msec:Start time of last target RSCN GIDPT
+ * @wwnn:		remote port WWNN
+ * @wwpn:		remote port WWPN
+ */
+struct efc_node {
+	struct efc		*efc;
+	char			display_name[EFC_NAME_LENGTH];
+	struct efc_nport	*nport;
+	struct kref		ref;
+	void			(*release)(struct kref *arg);
+	bool			hold_frames;
+	bool			els_io_enabled;
+	bool			send_plogi_acc;
+	bool			send_plogi;
+	bool			rscn_pending;
+	bool			fcp_enabled;
+	bool			attached;
+	bool			req_free;
+
+	spinlock_t		els_ios_lock;
+	struct list_head	els_ios_list;
+	void			*ini_node;
+	void			*tgt_node;
+
+	struct efc_remote_node	rnode;
+	/* Declarations private to FC trannport */
+	struct efc_sm_ctx	sm;
+	u32			evtdepth;
+
+	enum efc_node_send_ls_acc send_ls_acc;
+	void			*ls_acc_io;
+	u32			ls_acc_oxid;
+	u32			ls_acc_did;
+	enum efc_node_shutd_rsn	shutdown_reason;
+	bool			targ;
+	bool			init;
+	bool			refound;
+	struct efc_dma		sparm_dma_buf;
+	u8			service_params[EFC_SERVICE_PARMS_LENGTH];
+	spinlock_t		pend_frames_lock;
+	struct list_head	pend_frames;
+	u32			pend_frames_processed;
+	u32			ox_id_in_use;
+	u32			els_retries_remaining;
+	u32			els_req_cnt;
+	u32			els_cmpl_cnt;
+	u32			abort_cnt;
+
+	char			current_state_name[EFC_SM_NAME_LENGTH];
+	char			prev_state_name[EFC_SM_NAME_LENGTH];
+	int			current_evt;
+	int			prev_evt;
+
+	void (*nodedb_state)(struct efc_sm_ctx *ctx,
+			     enum efc_sm_event evt, void *arg);
+	struct timer_list	gidpt_delay_timer;
+	u64			time_last_gidpt_msec;
+
+	char			wwnn[EFC_WWN_LENGTH];
+	char			wwpn[EFC_WWN_LENGTH];
+};
+
+/**
+ * NPIV port
+ *
+ * Collection of the information required to restore a virtual port across
+ * link events
+ * @wwnn:		node name
+ * @wwpn:		port name
+ * @fc_id:		port id
+ * @tgt_data:		target backend pointer
+ * @ini_data:		initiator backend pointe
+ * @nport:		Used to match record after attaching for update
+ *
+ */
+
+struct efc_vport {
+	struct list_head	list_entry;
+	u64			wwnn;
+	u64			wwpn;
+	u32			fc_id;
+	bool			enable_tgt;
+	bool			enable_ini;
+	void			*tgt_data;
+	void			*ini_data;
+	struct efc_nport	*nport;
+};
+
+#define node_printf(node, fmt, args...) \
+	efc_log_info(node->efc, "[%s] " fmt, node->display_name, ##args)
+
+/* Node SM IO Context Callback structure */
+struct efc_node_cb {
+	int			status;
+	int			ext_status;
+	struct efc_hw_rq_buffer *header;
+	struct efc_hw_rq_buffer *payload;
+	struct efc_dma		els_rsp;
+
+	/* Actual length of data received */
+	int			rsp_len;
+};
+
+struct efc_hw_rq_buffer {
+	u16			rqindex;
+	struct efc_dma		dma;
+};
+
+/**
+ * FC sequence object
+ *
+ * Defines a general FC sequence object
+ * @hw:			HW that owns this sequence
+ * @fcfi:		FCFI associated with sequence
+ * @header:		Received frame header
+ * @payload:		Received frame header
+ * @hw_priv:		HW private context
+ */
+struct efc_hw_sequence {
+	struct list_head	list_entry;
+	void			*hw;
+	u8			fcfi;
+	struct efc_hw_rq_buffer *header;
+	struct efc_hw_rq_buffer *payload;
+	void			*hw_priv;
+};
+
+enum efc_disc_io_type {
+	EFC_DISC_IO_ELS_REQ,
+	EFC_DISC_IO_ELS_RESP,
+	EFC_DISC_IO_CT_REQ,
+	EFC_DISC_IO_CT_RESP
+};
+
+struct efc_io_els_params {
+	u32             s_id;
+	u16             ox_id;
+	u8              timeout;
+};
+
+struct efc_io_ct_params {
+	u8              r_ctl;
+	u8              type;
+	u8              df_ctl;
+	u8              timeout;
+	u16             ox_id;
+};
+
+union efc_disc_io_param {
+	struct efc_io_els_params els;
+	struct efc_io_ct_params ct;
+};
+
+struct efc_disc_io {
+	struct efc_dma		req;         /* send buffer */
+	struct efc_dma		rsp;         /* receive buffer */
+	enum efc_disc_io_type	io_type;     /* EFC_DISC_IO_TYPE enum*/
+	u16			xmit_len;    /* Length of els request*/
+	u16			rsp_len;     /* Max length of rsps to be rcvd */
+	u32			rpi;         /* Registered RPI */
+	u32			vpi;         /* VPI for this nport */
+	u32			s_id;
+	u32			d_id;
+	bool			rpi_registered; /* if false, use tmp RPI */
+	union efc_disc_io_param iparam;
+};
+
+/* Return value indiacating the sequence can not be freed */
+#define EFC_HW_SEQ_HOLD		0
+/* Return value indiacating the sequence can be freed */
+#define EFC_HW_SEQ_FREE		1
+
+struct libefc_function_template {
+	/*Sport*/
+	int (*new_nport)(struct efc *efc, struct efc_nport *sp);
+	void (*del_nport)(struct efc *efc, struct efc_nport *sp);
+
+	/*Scsi Node*/
+	int (*scsi_new_node)(struct efc *efc, struct efc_node *n);
+	int (*scsi_del_node)(struct efc *efc, struct efc_node *n, int reason);
+
+	int (*issue_mbox_rqst)(void *efct, void *buf, void *cb, void *arg);
+	/*Send ELS IO*/
+	int (*send_els)(struct efc *efc, struct efc_disc_io *io);
+	/*Send BLS IO*/
+	int (*send_bls)(struct efc *efc, u32 type, struct sli_bls_params *bls);
+	/*Free HW frame*/
+	int (*hw_seq_free)(struct efc *efc, struct efc_hw_sequence *seq);
+};
+
+#define EFC_LOG_LIB		0x01
+#define EFC_LOG_NODE		0x02
+#define EFC_LOG_PORT		0x04
+#define EFC_LOG_DOMAIN		0x08
+#define EFC_LOG_ELS		0x10
+#define EFC_LOG_DOMAIN_SM	0x20
+#define EFC_LOG_SM		0x40
+
+/* efc library port structure */
+struct efc {
+	void			*base;
+	struct pci_dev		*pci;
+	struct sli4		*sli;
+	u32			fcfi;
+	u64			req_wwpn;
+	u64			req_wwnn;
+
+	u64			def_wwpn;
+	u64			def_wwnn;
+	u64			max_xfer_size;
+	mempool_t		*node_pool;
+	struct dma_pool		*node_dma_pool;
+	u32			nodes_count;
+
+	u32			link_status;
+
+	struct list_head	vport_list;
+	/* lock to protect the vport list */
+	spinlock_t		vport_lock;
+
+	struct libefc_function_template tt;
+	/* lock to protect the discovery library.
+	 * Refer to efclib.c for more details.
+	 */
+	spinlock_t		lock;
+
+	bool			enable_ini;
+	bool			enable_tgt;
+
+	u32			log_level;
+
+	struct efc_domain	*domain;
+	void (*domain_free_cb)(struct efc *efc, void *arg);
+	void			*domain_free_cb_arg;
+
+	u64			tgt_rscn_delay_msec;
+	u64			tgt_rscn_period_msec;
+
+	bool			external_loopback;
+	u32			nodedb_mask;
+	u32			logmask;
+	mempool_t		*els_io_pool;
+	atomic_t		els_io_alloc_failed_count;
+
+	/* hold pending frames */
+	bool			hold_frames;
+	/* lock to protect pending frames list access */
+	spinlock_t		pend_frames_lock;
+	struct list_head	pend_frames;
+	/* count of pending frames that were processed */
+	u32			pend_frames_processed;
+
+};
+
+/*
+ * EFC library registration
+ * **********************************/
+int efcport_init(struct efc *efc);
+void efcport_destroy(struct efc *efc);
+/*
+ * EFC Domain
+ * **********************************/
+int efc_domain_cb(void *arg, int event, void *data);
+void
+efc_register_domain_free_cb(struct efc *efc,
+			    void (*callback)(struct efc *efc, void *arg),
+			    void *arg);
+
+/*
+ * EFC nport
+ * **********************************/
+void efc_nport_cb(void *arg, int event, void *data);
+struct efc_vport *
+efc_vport_create_spec(struct efc *efc, u64 wwnn, u64 wwpn, u32 fc_id,
+		      bool enable_ini, bool enable_tgt,
+		      void *tgt_data, void *ini_data);
+int efc_nport_vport_new(struct efc_domain *domain, u64 wwpn,
+			u64 wwnn, u32 fc_id, bool ini, bool tgt,
+			void *tgt_data, void *ini_data);
+int efc_nport_vport_del(struct efc *efc, struct efc_domain *domain,
+			u64 wwpn, u64 wwnn);
+
+void efc_vport_del_all(struct efc *efc);
+
+/*
+ * EFC Node
+ * **********************************/
+int efc_remote_node_cb(void *arg, int event, void *data);
+void efc_node_fcid_display(u32 fc_id, char *buffer, u32 buf_len);
+void efc_node_post_shutdown(struct efc_node *node, void *arg);
+u64 efc_node_get_wwpn(struct efc_node *node);
+
+/*
+ * EFC FCP/ELS/CT interface
+ * **********************************/
+void efc_dispatch_frame(struct efc *efc, struct efc_hw_sequence *seq);
+void efc_disc_io_complete(struct efc_disc_io *io, u32 len, u32 status,
+			  u32 ext_status);
+
+/*
+ * EFC SCSI INTERACTION LAYER
+ * **********************************/
+void efc_scsi_sess_reg_complete(struct efc_node *node, u32 status);
+void efc_scsi_del_initiator_complete(struct efc *efc, struct efc_node *node);
+void efc_scsi_del_target_complete(struct efc *efc, struct efc_node *node);
+void efc_scsi_io_list_empty(struct efc *efc, struct efc_node *node);
+
+#endif /* __EFCLIB_H__ */