--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+/*
+ * domain_sm Domain State Machine: States
+ */
+
+#include "efc.h"
+
+int
+efc_domain_cb(void *arg, int event, void *data)
+{
+ struct efc *efc = arg;
+ struct efc_domain *domain = NULL;
+ int rc = 0;
+ unsigned long flags = 0;
+
+ if (event != EFC_HW_DOMAIN_FOUND)
+ domain = data;
+
+ /* Accept domain callback events from the user driver */
+ spin_lock_irqsave(&efc->lock, flags);
+ switch (event) {
+ case EFC_HW_DOMAIN_FOUND: {
+ u64 fcf_wwn = 0;
+ struct efc_domain_record *drec = data;
+
+ /* extract the fcf_wwn */
+ fcf_wwn = be64_to_cpu(*((__be64 *)drec->wwn));
+
+ efc_log_debug(efc, "Domain found: wwn %016llX\n", fcf_wwn);
+
+ /* lookup domain, or allocate a new one */
+ domain = efc->domain;
+ if (!domain) {
+ domain = efc_domain_alloc(efc, fcf_wwn);
+ if (!domain) {
+ efc_log_err(efc, "efc_domain_alloc() failed\n");
+ rc = -1;
+ break;
+ }
+ efc_sm_transition(&domain->drvsm, __efc_domain_init,
+ NULL);
+ }
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_FOUND, drec);
+ break;
+ }
+
+ case EFC_HW_DOMAIN_LOST:
+ domain_trace(domain, "EFC_HW_DOMAIN_LOST:\n");
+ efc->hold_frames = true;
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_LOST, NULL);
+ break;
+
+ case EFC_HW_DOMAIN_ALLOC_OK:
+ domain_trace(domain, "EFC_HW_DOMAIN_ALLOC_OK:\n");
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_ALLOC_OK, NULL);
+ break;
+
+ case EFC_HW_DOMAIN_ALLOC_FAIL:
+ domain_trace(domain, "EFC_HW_DOMAIN_ALLOC_FAIL:\n");
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_ALLOC_FAIL,
+ NULL);
+ break;
+
+ case EFC_HW_DOMAIN_ATTACH_OK:
+ domain_trace(domain, "EFC_HW_DOMAIN_ATTACH_OK:\n");
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_ATTACH_OK, NULL);
+ break;
+
+ case EFC_HW_DOMAIN_ATTACH_FAIL:
+ domain_trace(domain, "EFC_HW_DOMAIN_ATTACH_FAIL:\n");
+ efc_domain_post_event(domain,
+ EFC_EVT_DOMAIN_ATTACH_FAIL, NULL);
+ break;
+
+ case EFC_HW_DOMAIN_FREE_OK:
+ domain_trace(domain, "EFC_HW_DOMAIN_FREE_OK:\n");
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_FREE_OK, NULL);
+ break;
+
+ case EFC_HW_DOMAIN_FREE_FAIL:
+ domain_trace(domain, "EFC_HW_DOMAIN_FREE_FAIL:\n");
+ efc_domain_post_event(domain, EFC_EVT_DOMAIN_FREE_FAIL, NULL);
+ break;
+
+ default:
+ efc_log_warn(efc, "unsupported event %#x\n", event);
+ }
+ spin_unlock_irqrestore(&efc->lock, flags);
+
+ if (efc->domain && domain->req_accept_frames) {
+ domain->req_accept_frames = false;
+ efc->hold_frames = false;
+ }
+
+ return rc;
+}
+
+static void
+_efc_domain_free(struct kref *arg)
+{
+ struct efc_domain *domain = container_of(arg, struct efc_domain, ref);
+ struct efc *efc = domain->efc;
+
+ if (efc->domain_free_cb)
+ (*efc->domain_free_cb)(efc, efc->domain_free_cb_arg);
+
+ kfree(domain);
+}
+
+void
+efc_domain_free(struct efc_domain *domain)
+{
+ struct efc *efc;
+
+ efc = domain->efc;
+
+ /* Hold frames to clear the domain pointer from the xport lookup */
+ efc->hold_frames = false;
+
+ efc_log_debug(efc, "Domain free: wwn %016llX\n", domain->fcf_wwn);
+
+ xa_destroy(&domain->lookup);
+ efc->domain = NULL;
+ kref_put(&domain->ref, domain->release);
+}
+
+struct efc_domain *
+efc_domain_alloc(struct efc *efc, uint64_t fcf_wwn)
+{
+ struct efc_domain *domain;
+
+ domain = kzalloc(sizeof(*domain), GFP_ATOMIC);
+ if (!domain)
+ return NULL;
+
+ domain->efc = efc;
+ domain->drvsm.app = domain;
+
+ /* initialize refcount */
+ kref_init(&domain->ref);
+ domain->release = _efc_domain_free;
+
+ xa_init(&domain->lookup);
+
+ INIT_LIST_HEAD(&domain->nport_list);
+ efc->domain = domain;
+ domain->fcf_wwn = fcf_wwn;
+ efc_log_debug(efc, "Domain allocated: wwn %016llX\n", domain->fcf_wwn);
+
+ return domain;
+}
+
+void
+efc_register_domain_free_cb(struct efc *efc,
+ void (*callback)(struct efc *efc, void *arg),
+ void *arg)
+{
+ /* Register a callback to be called when the domain is freed */
+ efc->domain_free_cb = callback;
+ efc->domain_free_cb_arg = arg;
+ if (!efc->domain && callback)
+ (*callback)(efc, arg);
+}
+
+static void
+__efc_domain_common(const char *funcname, struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_domain *domain = ctx->app;
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ case EFC_EVT_REENTER:
+ case EFC_EVT_EXIT:
+ case EFC_EVT_ALL_CHILD_NODES_FREE:
+ /*
+ * this can arise if an FLOGI fails on the NPORT,
+ * and the NPORT is shutdown
+ */
+ break;
+ default:
+ efc_log_warn(domain->efc, "%-20s %-20s not handled\n",
+ funcname, efc_sm_event_name(evt));
+ }
+}
+
+static void
+__efc_domain_common_shutdown(const char *funcname, struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_domain *domain = ctx->app;
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ case EFC_EVT_REENTER:
+ case EFC_EVT_EXIT:
+ break;
+ case EFC_EVT_DOMAIN_FOUND:
+ /* save drec, mark domain_found_pending */
+ memcpy(&domain->pending_drec, arg,
+ sizeof(domain->pending_drec));
+ domain->domain_found_pending = true;
+ break;
+ case EFC_EVT_DOMAIN_LOST:
+ /* unmark domain_found_pending */
+ domain->domain_found_pending = false;
+ break;
+
+ default:
+ efc_log_warn(domain->efc, "%-20s %-20s not handled\n",
+ funcname, efc_sm_event_name(evt));
+ }
+}
+
+#define std_domain_state_decl(...)\
+ struct efc_domain *domain = NULL;\
+ struct efc *efc = NULL;\
+ \
+ WARN_ON(!ctx || !ctx->app);\
+ domain = ctx->app;\
+ WARN_ON(!domain->efc);\
+ efc = domain->efc
+
+void
+__efc_domain_init(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+ void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ domain->attached = false;
+ break;
+
+ case EFC_EVT_DOMAIN_FOUND: {
+ u32 i;
+ struct efc_domain_record *drec = arg;
+ struct efc_nport *nport;
+
+ u64 my_wwnn = efc->req_wwnn;
+ u64 my_wwpn = efc->req_wwpn;
+ __be64 bewwpn;
+
+ if (my_wwpn == 0 || my_wwnn == 0) {
+ efc_log_debug(efc, "using default hardware WWN config\n");
+ my_wwpn = efc->def_wwpn;
+ my_wwnn = efc->def_wwnn;
+ }
+
+ efc_log_debug(efc, "Create nport WWPN %016llX WWNN %016llX\n",
+ my_wwpn, my_wwnn);
+
+ /* Allocate a nport and transition to __efc_nport_allocated */
+ nport = efc_nport_alloc(domain, my_wwpn, my_wwnn, U32_MAX,
+ efc->enable_ini, efc->enable_tgt);
+
+ if (!nport) {
+ efc_log_err(efc, "efc_nport_alloc() failed\n");
+ break;
+ }
+ efc_sm_transition(&nport->sm, __efc_nport_allocated, NULL);
+
+ bewwpn = cpu_to_be64(nport->wwpn);
+
+ /* allocate struct efc_nport object for local port
+ * Note: drec->fc_id is ALPA from read_topology only if loop
+ */
+ if (efc_cmd_nport_alloc(efc, nport, NULL, (uint8_t *)&bewwpn)) {
+ efc_log_err(efc, "Can't allocate port\n");
+ efc_nport_free(nport);
+ break;
+ }
+
+ domain->is_loop = drec->is_loop;
+
+ /*
+ * If the loop position map includes ALPA == 0,
+ * then we are in a public loop (NL_PORT)
+ * Note that the first element of the loopmap[]
+ * contains the count of elements, and if
+ * ALPA == 0 is present, it will occupy the first
+ * location after the count.
+ */
+ domain->is_nlport = drec->map.loop[1] == 0x00;
+
+ if (!domain->is_loop) {
+ /* Initiate HW domain alloc */
+ if (efc_cmd_domain_alloc(efc, domain, drec->index)) {
+ efc_log_err(efc,
+ "Failed to initiate HW domain allocation\n");
+ break;
+ }
+ efc_sm_transition(ctx, __efc_domain_wait_alloc, arg);
+ break;
+ }
+
+ efc_log_debug(efc, "%s fc_id=%#x speed=%d\n",
+ drec->is_loop ?
+ (domain->is_nlport ?
+ "public-loop" : "loop") : "other",
+ drec->fc_id, drec->speed);
+
+ nport->fc_id = drec->fc_id;
+ nport->topology = EFC_NPORT_TOPO_FC_AL;
+ snprintf(nport->display_name, sizeof(nport->display_name),
+ "s%06x", drec->fc_id);
+
+ if (efc->enable_ini) {
+ u32 count = drec->map.loop[0];
+
+ efc_log_debug(efc, "%d position map entries\n",
+ count);
+ for (i = 1; i <= count; i++) {
+ if (drec->map.loop[i] != drec->fc_id) {
+ struct efc_node *node;
+
+ efc_log_debug(efc, "%#x -> %#x\n",
+ drec->fc_id,
+ drec->map.loop[i]);
+ node = efc_node_alloc(nport,
+ drec->map.loop[i],
+ false, true);
+ if (!node) {
+ efc_log_err(efc,
+ "efc_node_alloc() failed\n");
+ break;
+ }
+ efc_node_transition(node,
+ __efc_d_wait_loop,
+ NULL);
+ }
+ }
+ }
+
+ /* Initiate HW domain alloc */
+ if (efc_cmd_domain_alloc(efc, domain, drec->index)) {
+ efc_log_err(efc,
+ "Failed to initiate HW domain allocation\n");
+ break;
+ }
+ efc_sm_transition(ctx, __efc_domain_wait_alloc, arg);
+ break;
+ }
+ default:
+ __efc_domain_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_wait_alloc(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_DOMAIN_ALLOC_OK: {
+ struct fc_els_flogi *sp;
+ struct efc_nport *nport;
+
+ nport = domain->nport;
+ if (WARN_ON(!nport))
+ return;
+
+ sp = (struct fc_els_flogi *)nport->service_params;
+
+ /* Save the domain service parameters */
+ memcpy(domain->service_params + 4, domain->dma.virt,
+ sizeof(struct fc_els_flogi) - 4);
+ memcpy(nport->service_params + 4, domain->dma.virt,
+ sizeof(struct fc_els_flogi) - 4);
+
+ /*
+ * Update the nport's service parameters,
+ * user might have specified non-default names
+ */
+ sp->fl_wwpn = cpu_to_be64(nport->wwpn);
+ sp->fl_wwnn = cpu_to_be64(nport->wwnn);
+
+ /*
+ * Take the loop topology path,
+ * unless we are an NL_PORT (public loop)
+ */
+ if (domain->is_loop && !domain->is_nlport) {
+ /*
+ * For loop, we already have our FC ID
+ * and don't need fabric login.
+ * Transition to the allocated state and
+ * post an event to attach to
+ * the domain. Note that this breaks the
+ * normal action/transition
+ * pattern here to avoid a race with the
+ * domain attach callback.
+ */
+ /* sm: is_loop / domain_attach */
+ efc_sm_transition(ctx, __efc_domain_allocated, NULL);
+ __efc_domain_attach_internal(domain, nport->fc_id);
+ break;
+ }
+ {
+ struct efc_node *node;
+
+ /* alloc fabric node, send FLOGI */
+ node = efc_node_find(nport, FC_FID_FLOGI);
+ if (node) {
+ efc_log_err(efc,
+ "Fabric Controller node already exists\n");
+ break;
+ }
+ node = efc_node_alloc(nport, FC_FID_FLOGI,
+ false, false);
+ if (!node) {
+ efc_log_err(efc,
+ "Error: efc_node_alloc() failed\n");
+ } else {
+ efc_node_transition(node,
+ __efc_fabric_init, NULL);
+ }
+ /* Accept frames */
+ domain->req_accept_frames = true;
+ }
+ /* sm: / start fabric logins */
+ efc_sm_transition(ctx, __efc_domain_allocated, NULL);
+ break;
+ }
+
+ case EFC_EVT_DOMAIN_ALLOC_FAIL:
+ efc_log_err(efc, "%s recv'd waiting for DOMAIN_ALLOC_OK;",
+ efc_sm_event_name(evt));
+ efc_log_err(efc, "shutting down domain\n");
+ domain->req_domain_free = true;
+ break;
+
+ case EFC_EVT_DOMAIN_FOUND:
+ /* Should not happen */
+ break;
+
+ case EFC_EVT_DOMAIN_LOST:
+ efc_log_debug(efc,
+ "%s received while waiting for hw_domain_alloc()\n",
+ efc_sm_event_name(evt));
+ efc_sm_transition(ctx, __efc_domain_wait_domain_lost, NULL);
+ break;
+
+ default:
+ __efc_domain_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_allocated(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_DOMAIN_REQ_ATTACH: {
+ int rc = 0;
+ u32 fc_id;
+
+ if (WARN_ON(!arg))
+ return;
+
+ fc_id = *((u32 *)arg);
+ efc_log_debug(efc, "Requesting hw domain attach fc_id x%x\n",
+ fc_id);
+ /* Update nport lookup */
+ rc = xa_err(xa_store(&domain->lookup, fc_id, domain->nport,
+ GFP_ATOMIC));
+ if (rc) {
+ efc_log_err(efc, "Sport lookup store failed: %d\n", rc);
+ return;
+ }
+
+ /* Update display name for the nport */
+ efc_node_fcid_display(fc_id, domain->nport->display_name,
+ sizeof(domain->nport->display_name));
+
+ /* Issue domain attach call */
+ rc = efc_cmd_domain_attach(efc, domain, fc_id);
+ if (rc) {
+ efc_log_err(efc, "efc_hw_domain_attach failed: %d\n",
+ rc);
+ return;
+ }
+ /* sm: / domain_attach */
+ efc_sm_transition(ctx, __efc_domain_wait_attach, NULL);
+ break;
+ }
+
+ case EFC_EVT_DOMAIN_FOUND:
+ /* Should not happen */
+ efc_log_err(efc, "%s: evt: %d should not happen\n",
+ __func__, evt);
+ break;
+
+ case EFC_EVT_DOMAIN_LOST: {
+ efc_log_debug(efc,
+ "%s received while in EFC_EVT_DOMAIN_REQ_ATTACH\n",
+ efc_sm_event_name(evt));
+ if (!list_empty(&domain->nport_list)) {
+ /*
+ * if there are nports, transition to
+ * wait state and send shutdown to each
+ * nport
+ */
+ struct efc_nport *nport = NULL, *nport_next = NULL;
+
+ efc_sm_transition(ctx, __efc_domain_wait_nports_free,
+ NULL);
+ list_for_each_entry_safe(nport, nport_next,
+ &domain->nport_list,
+ list_entry) {
+ efc_sm_post_event(&nport->sm,
+ EFC_EVT_SHUTDOWN, NULL);
+ }
+ } else {
+ /* no nports exist, free domain */
+ efc_sm_transition(ctx, __efc_domain_wait_shutdown,
+ NULL);
+ if (efc_cmd_domain_free(efc, domain))
+ efc_log_err(efc, "hw_domain_free failed\n");
+ }
+
+ break;
+ }
+
+ default:
+ __efc_domain_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_wait_attach(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_DOMAIN_ATTACH_OK: {
+ struct efc_node *node = NULL;
+ struct efc_nport *nport, *next_nport;
+ unsigned long index;
+
+ /*
+ * Set domain notify pending state to avoid
+ * duplicate domain event post
+ */
+ domain->domain_notify_pend = true;
+
+ /* Mark as attached */
+ domain->attached = true;
+
+ /* Transition to ready */
+ /* sm: / forward event to all nports and nodes */
+ efc_sm_transition(ctx, __efc_domain_ready, NULL);
+
+ /* We have an FCFI, so we can accept frames */
+ domain->req_accept_frames = true;
+
+ /*
+ * Notify all nodes that the domain attach request
+ * has completed
+ * Note: nport will have already received notification
+ * of nport attached as a result of the HW's port attach.
+ */
+ list_for_each_entry_safe(nport, next_nport,
+ &domain->nport_list, list_entry) {
+ xa_for_each(&nport->lookup, index, node) {
+ efc_node_post_event(node,
+ EFC_EVT_DOMAIN_ATTACH_OK,
+ NULL);
+ }
+ }
+ domain->domain_notify_pend = false;
+ break;
+ }
+
+ case EFC_EVT_DOMAIN_ATTACH_FAIL:
+ efc_log_debug(efc,
+ "%s received while waiting for hw attach\n",
+ efc_sm_event_name(evt));
+ break;
+
+ case EFC_EVT_DOMAIN_FOUND:
+ /* Should not happen */
+ efc_log_err(efc, "%s: evt: %d should not happen\n",
+ __func__, evt);
+ break;
+
+ case EFC_EVT_DOMAIN_LOST:
+ /*
+ * Domain lost while waiting for an attach to complete,
+ * go to a state that waits for the domain attach to
+ * complete, then handle domain lost
+ */
+ efc_sm_transition(ctx, __efc_domain_wait_domain_lost, NULL);
+ break;
+
+ case EFC_EVT_DOMAIN_REQ_ATTACH:
+ /*
+ * In P2P we can get an attach request from
+ * the other FLOGI path, so drop this one
+ */
+ break;
+
+ default:
+ __efc_domain_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_ready(struct efc_sm_ctx *ctx, enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_ENTER: {
+ /* start any pending vports */
+ if (efc_vport_start(domain)) {
+ efc_log_debug(domain->efc,
+ "efc_vport_start didn't start vports\n");
+ }
+ break;
+ }
+ case EFC_EVT_DOMAIN_LOST: {
+ if (!list_empty(&domain->nport_list)) {
+ /*
+ * if there are nports, transition to wait state
+ * and send shutdown to each nport
+ */
+ struct efc_nport *nport = NULL, *nport_next = NULL;
+
+ efc_sm_transition(ctx, __efc_domain_wait_nports_free,
+ NULL);
+ list_for_each_entry_safe(nport, nport_next,
+ &domain->nport_list,
+ list_entry) {
+ efc_sm_post_event(&nport->sm,
+ EFC_EVT_SHUTDOWN, NULL);
+ }
+ } else {
+ /* no nports exist, free domain */
+ efc_sm_transition(ctx, __efc_domain_wait_shutdown,
+ NULL);
+ if (efc_cmd_domain_free(efc, domain))
+ efc_log_err(efc, "hw_domain_free failed\n");
+ }
+ break;
+ }
+
+ case EFC_EVT_DOMAIN_FOUND:
+ /* Should not happen */
+ efc_log_err(efc, "%s: evt: %d should not happen\n",
+ __func__, evt);
+ break;
+
+ case EFC_EVT_DOMAIN_REQ_ATTACH: {
+ /* can happen during p2p */
+ u32 fc_id;
+
+ fc_id = *((u32 *)arg);
+
+ /* Assume that the domain is attached */
+ WARN_ON(!domain->attached);
+
+ /*
+ * Verify that the requested FC_ID
+ * is the same as the one we're working with
+ */
+ WARN_ON(domain->nport->fc_id != fc_id);
+ break;
+ }
+
+ default:
+ __efc_domain_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_wait_nports_free(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
+ void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ /* Wait for nodes to free prior to the domain shutdown */
+ switch (evt) {
+ case EFC_EVT_ALL_CHILD_NODES_FREE: {
+ int rc;
+
+ /* sm: / efc_hw_domain_free */
+ efc_sm_transition(ctx, __efc_domain_wait_shutdown, NULL);
+
+ /* Request efc_hw_domain_free and wait for completion */
+ rc = efc_cmd_domain_free(efc, domain);
+ if (rc) {
+ efc_log_err(efc, "efc_hw_domain_free() failed: %d\n",
+ rc);
+ }
+ break;
+ }
+ default:
+ __efc_domain_common_shutdown(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_wait_shutdown(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ switch (evt) {
+ case EFC_EVT_DOMAIN_FREE_OK:
+ /* sm: / domain_free */
+ if (domain->domain_found_pending) {
+ /*
+ * save fcf_wwn and drec from this domain,
+ * free current domain and allocate
+ * a new one with the same fcf_wwn
+ * could use a SLI-4 "re-register VPI"
+ * operation here?
+ */
+ u64 fcf_wwn = domain->fcf_wwn;
+ struct efc_domain_record drec = domain->pending_drec;
+
+ efc_log_debug(efc, "Reallocating domain\n");
+ domain->req_domain_free = true;
+ domain = efc_domain_alloc(efc, fcf_wwn);
+
+ if (!domain) {
+ efc_log_err(efc,
+ "efc_domain_alloc() failed\n");
+ return;
+ }
+ /*
+ * got a new domain; at this point,
+ * there are at least two domains
+ * once the req_domain_free flag is processed,
+ * the associated domain will be removed.
+ */
+ efc_sm_transition(&domain->drvsm, __efc_domain_init,
+ NULL);
+ efc_sm_post_event(&domain->drvsm,
+ EFC_EVT_DOMAIN_FOUND, &drec);
+ } else {
+ domain->req_domain_free = true;
+ }
+ break;
+ default:
+ __efc_domain_common_shutdown(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_wait_domain_lost(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ std_domain_state_decl();
+
+ domain_sm_trace(domain);
+
+ /*
+ * Wait for the domain alloc/attach completion
+ * after receiving a domain lost.
+ */
+ switch (evt) {
+ case EFC_EVT_DOMAIN_ALLOC_OK:
+ case EFC_EVT_DOMAIN_ATTACH_OK: {
+ if (!list_empty(&domain->nport_list)) {
+ /*
+ * if there are nports, transition to
+ * wait state and send shutdown to each nport
+ */
+ struct efc_nport *nport = NULL, *nport_next = NULL;
+
+ efc_sm_transition(ctx, __efc_domain_wait_nports_free,
+ NULL);
+ list_for_each_entry_safe(nport, nport_next,
+ &domain->nport_list,
+ list_entry) {
+ efc_sm_post_event(&nport->sm,
+ EFC_EVT_SHUTDOWN, NULL);
+ }
+ } else {
+ /* no nports exist, free domain */
+ efc_sm_transition(ctx, __efc_domain_wait_shutdown,
+ NULL);
+ if (efc_cmd_domain_free(efc, domain))
+ efc_log_err(efc, "hw_domain_free() failed\n");
+ }
+ break;
+ }
+ case EFC_EVT_DOMAIN_ALLOC_FAIL:
+ case EFC_EVT_DOMAIN_ATTACH_FAIL:
+ efc_log_err(efc, "[domain] %-20s: failed\n",
+ efc_sm_event_name(evt));
+ break;
+
+ default:
+ __efc_domain_common_shutdown(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_domain_attach_internal(struct efc_domain *domain, u32 s_id)
+{
+ memcpy(domain->dma.virt,
+ ((uint8_t *)domain->flogi_service_params) + 4,
+ sizeof(struct fc_els_flogi) - 4);
+ (void)efc_sm_post_event(&domain->drvsm, EFC_EVT_DOMAIN_REQ_ATTACH,
+ &s_id);
+}
+
+void
+efc_domain_attach(struct efc_domain *domain, u32 s_id)
+{
+ __efc_domain_attach_internal(domain, s_id);
+}
+
+int
+efc_domain_post_event(struct efc_domain *domain,
+ enum efc_sm_event event, void *arg)
+{
+ int rc;
+ bool req_domain_free;
+
+ rc = efc_sm_post_event(&domain->drvsm, event, arg);
+
+ req_domain_free = domain->req_domain_free;
+ domain->req_domain_free = false;
+
+ if (req_domain_free)
+ efc_domain_free(domain);
+
+ return rc;
+}
+
+static void
+efct_domain_process_pending(struct efc_domain *domain)
+{
+ struct efc *efc = domain->efc;
+ struct efc_hw_sequence *seq = NULL;
+ u32 processed = 0;
+ unsigned long flags = 0;
+
+ for (;;) {
+ /* need to check for hold frames condition after each frame
+ * processed because any given frame could cause a transition
+ * to a state that holds frames
+ */
+ if (efc->hold_frames)
+ break;
+
+ /* Get next frame/sequence */
+ spin_lock_irqsave(&efc->pend_frames_lock, flags);
+
+ if (!list_empty(&efc->pend_frames)) {
+ seq = list_first_entry(&efc->pend_frames,
+ struct efc_hw_sequence, list_entry);
+ list_del(&seq->list_entry);
+ }
+
+ if (!seq) {
+ processed = efc->pend_frames_processed;
+ efc->pend_frames_processed = 0;
+ spin_unlock_irqrestore(&efc->pend_frames_lock, flags);
+ break;
+ }
+ efc->pend_frames_processed++;
+
+ spin_unlock_irqrestore(&efc->pend_frames_lock, flags);
+
+ /* now dispatch frame(s) to dispatch function */
+ if (efc_domain_dispatch_frame(domain, seq))
+ efc->tt.hw_seq_free(efc, seq);
+
+ seq = NULL;
+ }
+
+ if (processed != 0)
+ efc_log_debug(efc, "%u domain frames held and processed\n",
+ processed);
+}
+
+void
+efc_dispatch_frame(struct efc *efc, struct efc_hw_sequence *seq)
+{
+ struct efc_domain *domain = efc->domain;
+
+ /*
+ * If we are holding frames or the domain is not yet registered or
+ * there's already frames on the pending list,
+ * then add the new frame to pending list
+ */
+ if (!domain || efc->hold_frames || !list_empty(&efc->pend_frames)) {
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->pend_frames_lock, flags);
+ INIT_LIST_HEAD(&seq->list_entry);
+ list_add_tail(&seq->list_entry, &efc->pend_frames);
+ spin_unlock_irqrestore(&efc->pend_frames_lock, flags);
+
+ if (domain) {
+ /* immediately process pending frames */
+ efct_domain_process_pending(domain);
+ }
+ } else {
+ /*
+ * We are not holding frames and pending list is empty,
+ * just process frame. A non-zero return means the frame
+ * was not handled - so cleanup
+ */
+ if (efc_domain_dispatch_frame(domain, seq))
+ efc->tt.hw_seq_free(efc, seq);
+ }
+}
+
+int
+efc_domain_dispatch_frame(void *arg, struct efc_hw_sequence *seq)
+{
+ struct efc_domain *domain = (struct efc_domain *)arg;
+ struct efc *efc = domain->efc;
+ struct fc_frame_header *hdr;
+ struct efc_node *node = NULL;
+ struct efc_nport *nport = NULL;
+ unsigned long flags = 0;
+ u32 s_id, d_id, rc = EFC_HW_SEQ_FREE;
+
+ if (!seq->header || !seq->header->dma.virt || !seq->payload->dma.virt) {
+ efc_log_err(efc, "Sequence header or payload is null\n");
+ return rc;
+ }
+
+ hdr = seq->header->dma.virt;
+
+ /* extract the s_id and d_id */
+ s_id = ntoh24(hdr->fh_s_id);
+ d_id = ntoh24(hdr->fh_d_id);
+
+ spin_lock_irqsave(&efc->lock, flags);
+
+ nport = efc_nport_find(domain, d_id);
+ if (!nport) {
+ if (hdr->fh_type == FC_TYPE_FCP) {
+ /* Drop frame */
+ efc_log_warn(efc, "FCP frame with invalid d_id x%x\n",
+ d_id);
+ goto out;
+ }
+
+ /* p2p will use this case */
+ nport = domain->nport;
+ if (!nport || !kref_get_unless_zero(&nport->ref)) {
+ efc_log_err(efc, "Physical nport is NULL\n");
+ goto out;
+ }
+ }
+
+ /* Lookup the node given the remote s_id */
+ node = efc_node_find(nport, s_id);
+
+ /* If not found, then create a new node */
+ if (!node) {
+ /*
+ * If this is solicited data or control based on R_CTL and
+ * there is no node context, then we can drop the frame
+ */
+ if ((hdr->fh_r_ctl == FC_RCTL_DD_SOL_DATA) ||
+ (hdr->fh_r_ctl == FC_RCTL_DD_SOL_CTL)) {
+ efc_log_debug(efc, "sol data/ctrl frame without node\n");
+ goto out_release;
+ }
+
+ node = efc_node_alloc(nport, s_id, false, false);
+ if (!node) {
+ efc_log_err(efc, "efc_node_alloc() failed\n");
+ goto out_release;
+ }
+ /* don't send PLOGI on efc_d_init entry */
+ efc_node_init_device(node, false);
+ }
+
+ if (node->hold_frames || !list_empty(&node->pend_frames)) {
+ /* add frame to node's pending list */
+ spin_lock_irqsave(&node->pend_frames_lock, flags);
+ INIT_LIST_HEAD(&seq->list_entry);
+ list_add_tail(&seq->list_entry, &node->pend_frames);
+ spin_unlock_irqrestore(&node->pend_frames_lock, flags);
+ rc = EFC_HW_SEQ_HOLD;
+ goto out_release;
+ }
+
+ /* now dispatch frame to the node frame handler */
+ efc_node_dispatch_frame(node, seq);
+
+out_release:
+ kref_put(&nport->ref, nport->release);
+out:
+ spin_unlock_irqrestore(&efc->lock, flags);
+ return rc;
+}
+
+void
+efc_node_dispatch_frame(void *arg, struct efc_hw_sequence *seq)
+{
+ struct fc_frame_header *hdr = seq->header->dma.virt;
+ u32 port_id;
+ struct efc_node *node = (struct efc_node *)arg;
+ struct efc *efc = node->efc;
+
+ port_id = ntoh24(hdr->fh_s_id);
+
+ if (WARN_ON(port_id != node->rnode.fc_id))
+ return;
+
+ if ((!(ntoh24(hdr->fh_f_ctl) & FC_FC_END_SEQ)) ||
+ !(ntoh24(hdr->fh_f_ctl) & FC_FC_SEQ_INIT)) {
+ node_printf(node,
+ "Drop frame hdr = %08x %08x %08x %08x %08x %08x\n",
+ cpu_to_be32(((u32 *)hdr)[0]),
+ cpu_to_be32(((u32 *)hdr)[1]),
+ cpu_to_be32(((u32 *)hdr)[2]),
+ cpu_to_be32(((u32 *)hdr)[3]),
+ cpu_to_be32(((u32 *)hdr)[4]),
+ cpu_to_be32(((u32 *)hdr)[5]));
+ return;
+ }
+
+ switch (hdr->fh_r_ctl) {
+ case FC_RCTL_ELS_REQ:
+ case FC_RCTL_ELS_REP:
+ efc_node_recv_els_frame(node, seq);
+ break;
+
+ case FC_RCTL_BA_ABTS:
+ case FC_RCTL_BA_ACC:
+ case FC_RCTL_BA_RJT:
+ case FC_RCTL_BA_NOP:
+ efc_log_err(efc, "Received ABTS:\n");
+ break;
+
+ case FC_RCTL_DD_UNSOL_CMD:
+ case FC_RCTL_DD_UNSOL_CTL:
+ switch (hdr->fh_type) {
+ case FC_TYPE_FCP:
+ if ((hdr->fh_r_ctl & 0xf) == FC_RCTL_DD_UNSOL_CMD) {
+ if (!node->fcp_enabled) {
+ efc_node_recv_fcp_cmd(node, seq);
+ break;
+ }
+ efc_log_err(efc, "Recvd FCP CMD. Drop IO\n");
+ } else if ((hdr->fh_r_ctl & 0xf) ==
+ FC_RCTL_DD_SOL_DATA) {
+ node_printf(node,
+ "solicited data recvd. Drop IO\n");
+ }
+ break;
+
+ case FC_TYPE_CT:
+ efc_node_recv_ct_frame(node, seq);
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ efc_log_err(efc, "Unhandled frame rctl: %02x\n", hdr->fh_r_ctl);
+ }
+}
projects / platform / kernel / linux-starfive.git / commitdiff