--- /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.
+ */
+
+#include "efc.h"
+
+int
+efc_remote_node_cb(void *arg, int event, void *data)
+{
+ struct efc *efc = arg;
+ struct efc_remote_node *rnode = data;
+ struct efc_node *node = rnode->node;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ efc_node_post_event(node, event, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+
+ return 0;
+}
+
+struct efc_node *
+efc_node_find(struct efc_nport *nport, u32 port_id)
+{
+ /* Find an FC node structure given the FC port ID */
+ return xa_load(&nport->lookup, port_id);
+}
+
+static void
+_efc_node_free(struct kref *arg)
+{
+ struct efc_node *node = container_of(arg, struct efc_node, ref);
+ struct efc *efc = node->efc;
+ struct efc_dma *dma;
+
+ dma = &node->sparm_dma_buf;
+ dma_pool_free(efc->node_dma_pool, dma->virt, dma->phys);
+ memset(dma, 0, sizeof(struct efc_dma));
+ mempool_free(node, efc->node_pool);
+}
+
+struct efc_node *efc_node_alloc(struct efc_nport *nport,
+ u32 port_id, bool init, bool targ)
+{
+ int rc;
+ struct efc_node *node = NULL;
+ struct efc *efc = nport->efc;
+ struct efc_dma *dma;
+
+ if (nport->shutting_down) {
+ efc_log_debug(efc, "node allocation when shutting down %06x",
+ port_id);
+ return NULL;
+ }
+
+ node = mempool_alloc(efc->node_pool, GFP_ATOMIC);
+ if (!node) {
+ efc_log_err(efc, "node allocation failed %06x", port_id);
+ return NULL;
+ }
+ memset(node, 0, sizeof(*node));
+
+ dma = &node->sparm_dma_buf;
+ dma->size = NODE_SPARAMS_SIZE;
+ dma->virt = dma_pool_zalloc(efc->node_dma_pool, GFP_ATOMIC, &dma->phys);
+ if (!dma->virt) {
+ efc_log_err(efc, "node dma alloc failed\n");
+ goto dma_fail;
+ }
+ node->rnode.indicator = U32_MAX;
+ node->nport = nport;
+
+ node->efc = efc;
+ node->init = init;
+ node->targ = targ;
+
+ spin_lock_init(&node->pend_frames_lock);
+ INIT_LIST_HEAD(&node->pend_frames);
+ spin_lock_init(&node->els_ios_lock);
+ INIT_LIST_HEAD(&node->els_ios_list);
+ node->els_io_enabled = true;
+
+ rc = efc_cmd_node_alloc(efc, &node->rnode, port_id, nport);
+ if (rc) {
+ efc_log_err(efc, "efc_hw_node_alloc failed: %d\n", rc);
+ goto hw_alloc_fail;
+ }
+
+ node->rnode.node = node;
+ node->sm.app = node;
+ node->evtdepth = 0;
+
+ efc_node_update_display_name(node);
+
+ rc = xa_err(xa_store(&nport->lookup, port_id, node, GFP_ATOMIC));
+ if (rc) {
+ efc_log_err(efc, "Node lookup store failed: %d\n", rc);
+ goto xa_fail;
+ }
+
+ /* initialize refcount */
+ kref_init(&node->ref);
+ node->release = _efc_node_free;
+ kref_get(&nport->ref);
+
+ return node;
+
+xa_fail:
+ efc_node_free_resources(efc, &node->rnode);
+hw_alloc_fail:
+ dma_pool_free(efc->node_dma_pool, dma->virt, dma->phys);
+dma_fail:
+ mempool_free(node, efc->node_pool);
+ return NULL;
+}
+
+void
+efc_node_free(struct efc_node *node)
+{
+ struct efc_nport *nport;
+ struct efc *efc;
+ int rc = 0;
+ struct efc_node *ns = NULL;
+
+ nport = node->nport;
+ efc = node->efc;
+
+ node_printf(node, "Free'd\n");
+
+ if (node->refound) {
+ /*
+ * Save the name server node. We will send fake RSCN event at
+ * the end to handle ignored RSCN event during node deletion
+ */
+ ns = efc_node_find(node->nport, FC_FID_DIR_SERV);
+ }
+
+ if (!node->nport) {
+ efc_log_err(efc, "Node already Freed\n");
+ return;
+ }
+
+ /* Free HW resources */
+ rc = efc_node_free_resources(efc, &node->rnode);
+ if (rc < 0)
+ efc_log_err(efc, "efc_hw_node_free failed: %d\n", rc);
+
+ /* if the gidpt_delay_timer is still running, then delete it */
+ if (timer_pending(&node->gidpt_delay_timer))
+ del_timer(&node->gidpt_delay_timer);
+
+ xa_erase(&nport->lookup, node->rnode.fc_id);
+
+ /*
+ * If the node_list is empty,
+ * then post a ALL_CHILD_NODES_FREE event to the nport,
+ * after the lock is released.
+ * The nport may be free'd as a result of the event.
+ */
+ if (xa_empty(&nport->lookup))
+ efc_sm_post_event(&nport->sm, EFC_EVT_ALL_CHILD_NODES_FREE,
+ NULL);
+
+ node->nport = NULL;
+ node->sm.current_state = NULL;
+
+ kref_put(&nport->ref, nport->release);
+ kref_put(&node->ref, node->release);
+
+ if (ns) {
+ /* sending fake RSCN event to name server node */
+ efc_node_post_event(ns, EFC_EVT_RSCN_RCVD, NULL);
+ }
+}
+
+static void
+efc_dma_copy_in(struct efc_dma *dma, void *buffer, u32 buffer_length)
+{
+ if (!dma || !buffer || !buffer_length)
+ return;
+
+ if (buffer_length > dma->size)
+ buffer_length = dma->size;
+
+ memcpy(dma->virt, buffer, buffer_length);
+ dma->len = buffer_length;
+}
+
+int
+efc_node_attach(struct efc_node *node)
+{
+ int rc = 0;
+ struct efc_nport *nport = node->nport;
+ struct efc_domain *domain = nport->domain;
+ struct efc *efc = node->efc;
+
+ if (!domain->attached) {
+ efc_log_err(efc, "Warning: unattached domain\n");
+ return -EIO;
+ }
+ /* Update node->wwpn/wwnn */
+
+ efc_node_build_eui_name(node->wwpn, sizeof(node->wwpn),
+ efc_node_get_wwpn(node));
+ efc_node_build_eui_name(node->wwnn, sizeof(node->wwnn),
+ efc_node_get_wwnn(node));
+
+ efc_dma_copy_in(&node->sparm_dma_buf, node->service_params + 4,
+ sizeof(node->service_params) - 4);
+
+ /* take lock to protect node->rnode.attached */
+ rc = efc_cmd_node_attach(efc, &node->rnode, &node->sparm_dma_buf);
+ if (rc < 0)
+ efc_log_debug(efc, "efc_hw_node_attach failed: %d\n", rc);
+
+ return rc;
+}
+
+void
+efc_node_fcid_display(u32 fc_id, char *buffer, u32 buffer_length)
+{
+ switch (fc_id) {
+ case FC_FID_FLOGI:
+ snprintf(buffer, buffer_length, "fabric");
+ break;
+ case FC_FID_FCTRL:
+ snprintf(buffer, buffer_length, "fabctl");
+ break;
+ case FC_FID_DIR_SERV:
+ snprintf(buffer, buffer_length, "nserve");
+ break;
+ default:
+ if (fc_id == FC_FID_DOM_MGR) {
+ snprintf(buffer, buffer_length, "dctl%02x",
+ (fc_id & 0x0000ff));
+ } else {
+ snprintf(buffer, buffer_length, "%06x", fc_id);
+ }
+ break;
+ }
+}
+
+void
+efc_node_update_display_name(struct efc_node *node)
+{
+ u32 port_id = node->rnode.fc_id;
+ struct efc_nport *nport = node->nport;
+ char portid_display[16];
+
+ efc_node_fcid_display(port_id, portid_display, sizeof(portid_display));
+
+ snprintf(node->display_name, sizeof(node->display_name), "%s.%s",
+ nport->display_name, portid_display);
+}
+
+void
+efc_node_send_ls_io_cleanup(struct efc_node *node)
+{
+ if (node->send_ls_acc != EFC_NODE_SEND_LS_ACC_NONE) {
+ efc_log_debug(node->efc, "[%s] cleaning up LS_ACC oxid=0x%x\n",
+ node->display_name, node->ls_acc_oxid);
+
+ node->send_ls_acc = EFC_NODE_SEND_LS_ACC_NONE;
+ node->ls_acc_io = NULL;
+ }
+}
+
+static void efc_node_handle_implicit_logo(struct efc_node *node)
+{
+ int rc;
+
+ /*
+ * currently, only case for implicit logo is PLOGI
+ * recvd. Thus, node's ELS IO pending list won't be
+ * empty (PLOGI will be on it)
+ */
+ WARN_ON(node->send_ls_acc != EFC_NODE_SEND_LS_ACC_PLOGI);
+ node_printf(node, "Reason: implicit logout, re-authenticate\n");
+
+ /* Re-attach node with the same HW node resources */
+ node->req_free = false;
+ rc = efc_node_attach(node);
+ efc_node_transition(node, __efc_d_wait_node_attach, NULL);
+ node->els_io_enabled = true;
+
+ if (rc < 0)
+ efc_node_post_event(node, EFC_EVT_NODE_ATTACH_FAIL, NULL);
+}
+
+static void efc_node_handle_explicit_logo(struct efc_node *node)
+{
+ s8 pend_frames_empty;
+ unsigned long flags = 0;
+
+ /* cleanup any pending LS_ACC ELSs */
+ efc_node_send_ls_io_cleanup(node);
+
+ spin_lock_irqsave(&node->pend_frames_lock, flags);
+ pend_frames_empty = list_empty(&node->pend_frames);
+ spin_unlock_irqrestore(&node->pend_frames_lock, flags);
+
+ /*
+ * there are two scenarios where we want to keep
+ * this node alive:
+ * 1. there are pending frames that need to be
+ * processed or
+ * 2. we're an initiator and the remote node is
+ * a target and we need to re-authenticate
+ */
+ node_printf(node, "Shutdown: explicit logo pend=%d ", !pend_frames_empty);
+ node_printf(node, "nport.ini=%d node.tgt=%d\n",
+ node->nport->enable_ini, node->targ);
+ if (!pend_frames_empty || (node->nport->enable_ini && node->targ)) {
+ u8 send_plogi = false;
+
+ if (node->nport->enable_ini && node->targ) {
+ /*
+ * we're an initiator and
+ * node shutting down is a target;
+ * we'll need to re-authenticate in
+ * initial state
+ */
+ send_plogi = true;
+ }
+
+ /*
+ * transition to __efc_d_init
+ * (will retain HW node resources)
+ */
+ node->els_io_enabled = true;
+ node->req_free = false;
+
+ /*
+ * either pending frames exist or we are re-authenticating
+ * with PLOGI (or both); in either case, return to initial
+ * state
+ */
+ efc_node_init_device(node, send_plogi);
+ }
+ /* else: let node shutdown occur */
+}
+
+static void
+efc_node_purge_pending(struct efc_node *node)
+{
+ struct efc *efc = node->efc;
+ struct efc_hw_sequence *frame, *next;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&node->pend_frames_lock, flags);
+
+ list_for_each_entry_safe(frame, next, &node->pend_frames, list_entry) {
+ list_del(&frame->list_entry);
+ efc->tt.hw_seq_free(efc, frame);
+ }
+
+ spin_unlock_irqrestore(&node->pend_frames_lock, flags);
+}
+
+void
+__efc_node_shutdown(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_node *node = ctx->app;
+
+ efc_node_evt_set(ctx, evt, __func__);
+
+ node_sm_trace();
+
+ switch (evt) {
+ case EFC_EVT_ENTER: {
+ efc_node_hold_frames(node);
+ WARN_ON(!efc_els_io_list_empty(node, &node->els_ios_list));
+ /* by default, we will be freeing node after we unwind */
+ node->req_free = true;
+
+ switch (node->shutdown_reason) {
+ case EFC_NODE_SHUTDOWN_IMPLICIT_LOGO:
+ /* Node shutdown b/c of PLOGI received when node
+ * already logged in. We have PLOGI service
+ * parameters, so submit node attach; we won't be
+ * freeing this node
+ */
+
+ efc_node_handle_implicit_logo(node);
+ break;
+
+ case EFC_NODE_SHUTDOWN_EXPLICIT_LOGO:
+ efc_node_handle_explicit_logo(node);
+ break;
+
+ case EFC_NODE_SHUTDOWN_DEFAULT:
+ default: {
+ /*
+ * shutdown due to link down,
+ * node going away (xport event) or
+ * nport shutdown, purge pending and
+ * proceed to cleanup node
+ */
+
+ /* cleanup any pending LS_ACC ELSs */
+ efc_node_send_ls_io_cleanup(node);
+
+ node_printf(node,
+ "Shutdown reason: default, purge pending\n");
+ efc_node_purge_pending(node);
+ break;
+ }
+ }
+
+ break;
+ }
+ case EFC_EVT_EXIT:
+ efc_node_accept_frames(node);
+ break;
+
+ default:
+ __efc_node_common(__func__, ctx, evt, arg);
+ }
+}
+
+static bool
+efc_node_check_els_quiesced(struct efc_node *node)
+{
+ /* check to see if ELS requests, completions are quiesced */
+ if (node->els_req_cnt == 0 && node->els_cmpl_cnt == 0 &&
+ efc_els_io_list_empty(node, &node->els_ios_list)) {
+ if (!node->attached) {
+ /* hw node detach already completed, proceed */
+ node_printf(node, "HW node not attached\n");
+ efc_node_transition(node,
+ __efc_node_wait_ios_shutdown,
+ NULL);
+ } else {
+ /*
+ * hw node detach hasn't completed,
+ * transition and wait
+ */
+ node_printf(node, "HW node still attached\n");
+ efc_node_transition(node, __efc_node_wait_node_free,
+ NULL);
+ }
+ return true;
+ }
+ return false;
+}
+
+void
+efc_node_initiate_cleanup(struct efc_node *node)
+{
+ /*
+ * if ELS's have already been quiesced, will move to next state
+ * if ELS's have not been quiesced, abort them
+ */
+ if (!efc_node_check_els_quiesced(node)) {
+ efc_node_hold_frames(node);
+ efc_node_transition(node, __efc_node_wait_els_shutdown, NULL);
+ }
+}
+
+void
+__efc_node_wait_els_shutdown(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ bool check_quiesce = false;
+ struct efc_node *node = ctx->app;
+
+ efc_node_evt_set(ctx, evt, __func__);
+
+ node_sm_trace();
+ /* Node state machine: Wait for all ELSs to complete */
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ efc_node_hold_frames(node);
+ if (efc_els_io_list_empty(node, &node->els_ios_list)) {
+ node_printf(node, "All ELS IOs complete\n");
+ check_quiesce = true;
+ }
+ break;
+ case EFC_EVT_EXIT:
+ efc_node_accept_frames(node);
+ break;
+
+ case EFC_EVT_SRRS_ELS_REQ_OK:
+ case EFC_EVT_SRRS_ELS_REQ_FAIL:
+ case EFC_EVT_SRRS_ELS_REQ_RJT:
+ case EFC_EVT_ELS_REQ_ABORTED:
+ if (WARN_ON(!node->els_req_cnt))
+ break;
+ node->els_req_cnt--;
+ check_quiesce = true;
+ break;
+
+ case EFC_EVT_SRRS_ELS_CMPL_OK:
+ case EFC_EVT_SRRS_ELS_CMPL_FAIL:
+ if (WARN_ON(!node->els_cmpl_cnt))
+ break;
+ node->els_cmpl_cnt--;
+ check_quiesce = true;
+ break;
+
+ case EFC_EVT_ALL_CHILD_NODES_FREE:
+ /* all ELS IO's complete */
+ node_printf(node, "All ELS IOs complete\n");
+ WARN_ON(!efc_els_io_list_empty(node, &node->els_ios_list));
+ check_quiesce = true;
+ break;
+
+ case EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY:
+ check_quiesce = true;
+ break;
+
+ case EFC_EVT_DOMAIN_ATTACH_OK:
+ /* don't care about domain_attach_ok */
+ break;
+
+ /* ignore shutdown events as we're already in shutdown path */
+ case EFC_EVT_SHUTDOWN:
+ /* have default shutdown event take precedence */
+ node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
+ fallthrough;
+
+ case EFC_EVT_SHUTDOWN_EXPLICIT_LOGO:
+ case EFC_EVT_SHUTDOWN_IMPLICIT_LOGO:
+ node_printf(node, "%s received\n", efc_sm_event_name(evt));
+ break;
+
+ default:
+ __efc_node_common(__func__, ctx, evt, arg);
+ }
+
+ if (check_quiesce)
+ efc_node_check_els_quiesced(node);
+}
+
+void
+__efc_node_wait_node_free(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_node *node = ctx->app;
+
+ efc_node_evt_set(ctx, evt, __func__);
+
+ node_sm_trace();
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ efc_node_hold_frames(node);
+ break;
+
+ case EFC_EVT_EXIT:
+ efc_node_accept_frames(node);
+ break;
+
+ case EFC_EVT_NODE_FREE_OK:
+ /* node is officially no longer attached */
+ node->attached = false;
+ efc_node_transition(node, __efc_node_wait_ios_shutdown, NULL);
+ break;
+
+ case EFC_EVT_ALL_CHILD_NODES_FREE:
+ case EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY:
+ /* As IOs and ELS IO's complete we expect to get these events */
+ break;
+
+ case EFC_EVT_DOMAIN_ATTACH_OK:
+ /* don't care about domain_attach_ok */
+ break;
+
+ /* ignore shutdown events as we're already in shutdown path */
+ case EFC_EVT_SHUTDOWN:
+ /* have default shutdown event take precedence */
+ node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
+ fallthrough;
+
+ case EFC_EVT_SHUTDOWN_EXPLICIT_LOGO:
+ case EFC_EVT_SHUTDOWN_IMPLICIT_LOGO:
+ node_printf(node, "%s received\n", efc_sm_event_name(evt));
+ break;
+ default:
+ __efc_node_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_node_wait_ios_shutdown(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_node *node = ctx->app;
+ struct efc *efc = node->efc;
+
+ efc_node_evt_set(ctx, evt, __func__);
+
+ node_sm_trace();
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ efc_node_hold_frames(node);
+
+ /* first check to see if no ELS IOs are outstanding */
+ if (efc_els_io_list_empty(node, &node->els_ios_list))
+ /* If there are any active IOS, Free them. */
+ efc_node_transition(node, __efc_node_shutdown, NULL);
+ break;
+
+ case EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY:
+ case EFC_EVT_ALL_CHILD_NODES_FREE:
+ if (efc_els_io_list_empty(node, &node->els_ios_list))
+ efc_node_transition(node, __efc_node_shutdown, NULL);
+ break;
+
+ case EFC_EVT_EXIT:
+ efc_node_accept_frames(node);
+ break;
+
+ case EFC_EVT_SRRS_ELS_REQ_FAIL:
+ /* Can happen as ELS IO IO's complete */
+ if (WARN_ON(!node->els_req_cnt))
+ break;
+ node->els_req_cnt--;
+ break;
+
+ /* ignore shutdown events as we're already in shutdown path */
+ case EFC_EVT_SHUTDOWN:
+ /* have default shutdown event take precedence */
+ node->shutdown_reason = EFC_NODE_SHUTDOWN_DEFAULT;
+ fallthrough;
+
+ case EFC_EVT_SHUTDOWN_EXPLICIT_LOGO:
+ case EFC_EVT_SHUTDOWN_IMPLICIT_LOGO:
+ efc_log_debug(efc, "[%s] %-20s\n", node->display_name,
+ efc_sm_event_name(evt));
+ break;
+ case EFC_EVT_DOMAIN_ATTACH_OK:
+ /* don't care about domain_attach_ok */
+ break;
+ default:
+ __efc_node_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+__efc_node_common(const char *funcname, struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_node *node = NULL;
+ struct efc *efc = NULL;
+ struct efc_node_cb *cbdata = arg;
+
+ node = ctx->app;
+ efc = node->efc;
+
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ case EFC_EVT_REENTER:
+ case EFC_EVT_EXIT:
+ case EFC_EVT_NPORT_TOPOLOGY_NOTIFY:
+ case EFC_EVT_NODE_MISSING:
+ case EFC_EVT_FCP_CMD_RCVD:
+ break;
+
+ case EFC_EVT_NODE_REFOUND:
+ node->refound = true;
+ break;
+
+ /*
+ * node->attached must be set appropriately
+ * for all node attach/detach events
+ */
+ case EFC_EVT_NODE_ATTACH_OK:
+ node->attached = true;
+ break;
+
+ case EFC_EVT_NODE_FREE_OK:
+ case EFC_EVT_NODE_ATTACH_FAIL:
+ node->attached = false;
+ break;
+
+ /*
+ * handle any ELS completions that
+ * other states either didn't care about
+ * or forgot about
+ */
+ case EFC_EVT_SRRS_ELS_CMPL_OK:
+ case EFC_EVT_SRRS_ELS_CMPL_FAIL:
+ if (WARN_ON(!node->els_cmpl_cnt))
+ break;
+ node->els_cmpl_cnt--;
+ break;
+
+ /*
+ * handle any ELS request completions that
+ * other states either didn't care about
+ * or forgot about
+ */
+ case EFC_EVT_SRRS_ELS_REQ_OK:
+ case EFC_EVT_SRRS_ELS_REQ_FAIL:
+ case EFC_EVT_SRRS_ELS_REQ_RJT:
+ case EFC_EVT_ELS_REQ_ABORTED:
+ if (WARN_ON(!node->els_req_cnt))
+ break;
+ node->els_req_cnt--;
+ break;
+
+ case EFC_EVT_ELS_RCVD: {
+ struct fc_frame_header *hdr = cbdata->header->dma.virt;
+
+ /*
+ * Unsupported ELS was received,
+ * send LS_RJT, command not supported
+ */
+ efc_log_debug(efc,
+ "[%s] (%s) ELS x%02x, LS_RJT not supported\n",
+ node->display_name, funcname,
+ ((u8 *)cbdata->payload->dma.virt)[0]);
+
+ efc_send_ls_rjt(node, be16_to_cpu(hdr->fh_ox_id),
+ ELS_RJT_UNSUP, ELS_EXPL_NONE, 0);
+ break;
+ }
+
+ case EFC_EVT_PLOGI_RCVD:
+ case EFC_EVT_FLOGI_RCVD:
+ case EFC_EVT_LOGO_RCVD:
+ case EFC_EVT_PRLI_RCVD:
+ case EFC_EVT_PRLO_RCVD:
+ case EFC_EVT_PDISC_RCVD:
+ case EFC_EVT_FDISC_RCVD:
+ case EFC_EVT_ADISC_RCVD:
+ case EFC_EVT_RSCN_RCVD:
+ case EFC_EVT_SCR_RCVD: {
+ struct fc_frame_header *hdr = cbdata->header->dma.virt;
+
+ /* sm: / send ELS_RJT */
+ efc_log_debug(efc, "[%s] (%s) %s sending ELS_RJT\n",
+ node->display_name, funcname,
+ efc_sm_event_name(evt));
+ /* if we didn't catch this in a state, send generic LS_RJT */
+ efc_send_ls_rjt(node, be16_to_cpu(hdr->fh_ox_id),
+ ELS_RJT_UNAB, ELS_EXPL_NONE, 0);
+ break;
+ }
+ case EFC_EVT_ABTS_RCVD: {
+ efc_log_debug(efc, "[%s] (%s) %s sending BA_ACC\n",
+ node->display_name, funcname,
+ efc_sm_event_name(evt));
+
+ /* sm: / send BA_ACC */
+ efc_send_bls_acc(node, cbdata->header->dma.virt);
+ break;
+ }
+
+ default:
+ efc_log_debug(node->efc, "[%s] %-20s %-20s not handled\n",
+ node->display_name, funcname,
+ efc_sm_event_name(evt));
+ }
+}
+
+void
+efc_node_save_sparms(struct efc_node *node, void *payload)
+{
+ memcpy(node->service_params, payload, sizeof(node->service_params));
+}
+
+void
+efc_node_post_event(struct efc_node *node,
+ enum efc_sm_event evt, void *arg)
+{
+ bool free_node = false;
+
+ node->evtdepth++;
+
+ efc_sm_post_event(&node->sm, evt, arg);
+
+ /* If our event call depth is one and
+ * we're not holding frames
+ * then we can dispatch any pending frames.
+ * We don't want to allow the efc_process_node_pending()
+ * call to recurse.
+ */
+ if (!node->hold_frames && node->evtdepth == 1)
+ efc_process_node_pending(node);
+
+ node->evtdepth--;
+
+ /*
+ * Free the node object if so requested,
+ * and we're at an event call depth of zero
+ */
+ if (node->evtdepth == 0 && node->req_free)
+ free_node = true;
+
+ if (free_node)
+ efc_node_free(node);
+}
+
+void
+efc_node_transition(struct efc_node *node,
+ void (*state)(struct efc_sm_ctx *,
+ enum efc_sm_event, void *), void *data)
+{
+ struct efc_sm_ctx *ctx = &node->sm;
+
+ if (ctx->current_state == state) {
+ efc_node_post_event(node, EFC_EVT_REENTER, data);
+ } else {
+ efc_node_post_event(node, EFC_EVT_EXIT, data);
+ ctx->current_state = state;
+ efc_node_post_event(node, EFC_EVT_ENTER, data);
+ }
+}
+
+void
+efc_node_build_eui_name(char *buf, u32 buf_len, uint64_t eui_name)
+{
+ memset(buf, 0, buf_len);
+
+ snprintf(buf, buf_len, "eui.%016llX", (unsigned long long)eui_name);
+}
+
+u64
+efc_node_get_wwpn(struct efc_node *node)
+{
+ struct fc_els_flogi *sp =
+ (struct fc_els_flogi *)node->service_params;
+
+ return be64_to_cpu(sp->fl_wwpn);
+}
+
+u64
+efc_node_get_wwnn(struct efc_node *node)
+{
+ struct fc_els_flogi *sp =
+ (struct fc_els_flogi *)node->service_params;
+
+ return be64_to_cpu(sp->fl_wwnn);
+}
+
+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)
+{
+ return 0;
+}
+
+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)
+{
+ return 0;
+}
+
+int
+efc_els_io_list_empty(struct efc_node *node, struct list_head *list)
+{
+ int empty;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&node->els_ios_lock, flags);
+ empty = list_empty(list);
+ spin_unlock_irqrestore(&node->els_ios_lock, flags);
+ return empty;
+}
+
+void
+efc_node_pause(struct efc_node *node,
+ void (*state)(struct efc_sm_ctx *,
+ enum efc_sm_event, void *))
+
+{
+ node->nodedb_state = state;
+ efc_node_transition(node, __efc_node_paused, NULL);
+}
+
+void
+__efc_node_paused(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg)
+{
+ struct efc_node *node = ctx->app;
+
+ efc_node_evt_set(ctx, evt, __func__);
+
+ node_sm_trace();
+
+ /*
+ * This state is entered when a state is "paused". When resumed, the
+ * node is transitioned to a previously saved state (node->ndoedb_state)
+ */
+ switch (evt) {
+ case EFC_EVT_ENTER:
+ node_printf(node, "Paused\n");
+ break;
+
+ case EFC_EVT_RESUME: {
+ void (*pf)(struct efc_sm_ctx *ctx,
+ enum efc_sm_event evt, void *arg);
+
+ pf = node->nodedb_state;
+
+ node->nodedb_state = NULL;
+ efc_node_transition(node, pf, NULL);
+ break;
+ }
+
+ case EFC_EVT_DOMAIN_ATTACH_OK:
+ break;
+
+ case EFC_EVT_SHUTDOWN:
+ node->req_free = true;
+ break;
+
+ default:
+ __efc_node_common(__func__, ctx, evt, arg);
+ }
+}
+
+void
+efc_node_recv_els_frame(struct efc_node *node,
+ struct efc_hw_sequence *seq)
+{
+ u32 prli_size = sizeof(struct fc_els_prli) + sizeof(struct fc_els_spp);
+ struct {
+ u32 cmd;
+ enum efc_sm_event evt;
+ u32 payload_size;
+ } els_cmd_list[] = {
+ {ELS_PLOGI, EFC_EVT_PLOGI_RCVD, sizeof(struct fc_els_flogi)},
+ {ELS_FLOGI, EFC_EVT_FLOGI_RCVD, sizeof(struct fc_els_flogi)},
+ {ELS_LOGO, EFC_EVT_LOGO_RCVD, sizeof(struct fc_els_ls_acc)},
+ {ELS_PRLI, EFC_EVT_PRLI_RCVD, prli_size},
+ {ELS_PRLO, EFC_EVT_PRLO_RCVD, prli_size},
+ {ELS_PDISC, EFC_EVT_PDISC_RCVD, MAX_ACC_REJECT_PAYLOAD},
+ {ELS_FDISC, EFC_EVT_FDISC_RCVD, MAX_ACC_REJECT_PAYLOAD},
+ {ELS_ADISC, EFC_EVT_ADISC_RCVD, sizeof(struct fc_els_adisc)},
+ {ELS_RSCN, EFC_EVT_RSCN_RCVD, MAX_ACC_REJECT_PAYLOAD},
+ {ELS_SCR, EFC_EVT_SCR_RCVD, MAX_ACC_REJECT_PAYLOAD},
+ };
+ struct efc_node_cb cbdata;
+ u8 *buf = seq->payload->dma.virt;
+ enum efc_sm_event evt = EFC_EVT_ELS_RCVD;
+ u32 i;
+
+ memset(&cbdata, 0, sizeof(cbdata));
+ cbdata.header = seq->header;
+ cbdata.payload = seq->payload;
+
+ /* find a matching event for the ELS command */
+ for (i = 0; i < ARRAY_SIZE(els_cmd_list); i++) {
+ if (els_cmd_list[i].cmd == buf[0]) {
+ evt = els_cmd_list[i].evt;
+ break;
+ }
+ }
+
+ efc_node_post_event(node, evt, &cbdata);
+}
+
+void
+efc_node_recv_ct_frame(struct efc_node *node,
+ struct efc_hw_sequence *seq)
+{
+ struct fc_ct_hdr *iu = seq->payload->dma.virt;
+ struct fc_frame_header *hdr = seq->header->dma.virt;
+ struct efc *efc = node->efc;
+ u16 gscmd = be16_to_cpu(iu->ct_cmd);
+
+ efc_log_err(efc, "[%s] Received cmd :%x sending CT_REJECT\n",
+ node->display_name, gscmd);
+ efc_send_ct_rsp(efc, node, be16_to_cpu(hdr->fh_ox_id), iu,
+ FC_FS_RJT, FC_FS_RJT_UNSUP, 0);
+}
+
+void
+efc_node_recv_fcp_cmd(struct efc_node *node, struct efc_hw_sequence *seq)
+{
+ struct efc_node_cb cbdata;
+
+ memset(&cbdata, 0, sizeof(cbdata));
+ cbdata.header = seq->header;
+ cbdata.payload = seq->payload;
+
+ efc_node_post_event(node, EFC_EVT_FCP_CMD_RCVD, &cbdata);
+}
+
+void
+efc_process_node_pending(struct efc_node *node)
+{
+ struct efc *efc = node->efc;
+ struct efc_hw_sequence *seq = NULL;
+ u32 pend_frames_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 (node->hold_frames)
+ break;
+
+ seq = NULL;
+ /* Get next frame/sequence */
+ spin_lock_irqsave(&node->pend_frames_lock, flags);
+
+ if (!list_empty(&node->pend_frames)) {
+ seq = list_first_entry(&node->pend_frames,
+ struct efc_hw_sequence, list_entry);
+ list_del(&seq->list_entry);
+ }
+ spin_unlock_irqrestore(&node->pend_frames_lock, flags);
+
+ if (!seq) {
+ pend_frames_processed = node->pend_frames_processed;
+ node->pend_frames_processed = 0;
+ break;
+ }
+ node->pend_frames_processed++;
+
+ /* now dispatch frame(s) to dispatch function */
+ efc_node_dispatch_frame(node, seq);
+ efc->tt.hw_seq_free(efc, seq);
+ }
+
+ if (pend_frames_processed != 0)
+ efc_log_debug(efc, "%u node frames held and processed\n",
+ pend_frames_processed);
+}
+
+void
+efc_scsi_sess_reg_complete(struct efc_node *node, u32 status)
+{
+ unsigned long flags = 0;
+ enum efc_sm_event evt = EFC_EVT_NODE_SESS_REG_OK;
+ struct efc *efc = node->efc;
+
+ if (status)
+ evt = EFC_EVT_NODE_SESS_REG_FAIL;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ /* Notify the node to resume */
+ efc_node_post_event(node, evt, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+void
+efc_scsi_del_initiator_complete(struct efc *efc, struct efc_node *node)
+{
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ /* Notify the node to resume */
+ efc_node_post_event(node, EFC_EVT_NODE_DEL_INI_COMPLETE, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+void
+efc_scsi_del_target_complete(struct efc *efc, struct efc_node *node)
+{
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ /* Notify the node to resume */
+ efc_node_post_event(node, EFC_EVT_NODE_DEL_TGT_COMPLETE, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+void
+efc_scsi_io_list_empty(struct efc *efc, struct efc_node *node)
+{
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ efc_node_post_event(node, EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY, NULL);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+void efc_node_post_els_resp(struct efc_node *node, u32 evt, void *arg)
+{
+ struct efc *efc = node->efc;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ efc_node_post_event(node, evt, arg);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
+
+void efc_node_post_shutdown(struct efc_node *node, void *arg)
+{
+ unsigned long flags = 0;
+ struct efc *efc = node->efc;
+
+ spin_lock_irqsave(&efc->lock, flags);
+ efc_node_post_event(node, EFC_EVT_SHUTDOWN, arg);
+ spin_unlock_irqrestore(&efc->lock, flags);
+}
--- /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.
+ */
+
+#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) {
+ strncpy(node->current_state_name, handler,
+ sizeof(node->current_state_name));
+ } else if (evt == EFC_EVT_EXIT) {
+ strncpy(node->prev_state_name, node->current_state_name,
+ sizeof(node->prev_state_name));
+ strncpy(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__ */
projects / platform / kernel / linux-rpi.git / commitdiff