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stable/11/sys/dev/ocs_fc/ocs_fabric.c

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/*-
* Copyright (c) 2017 Broadcom. All rights reserved.
* The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/**
* @file
*
* This file implements remote node state machines for:
* - Fabric logins.
* - Fabric controller events.
* - Name/directory services interaction.
* - Point-to-point logins.
*/
/*!
@defgroup fabric_sm Node State Machine: Fabric States
@defgroup ns_sm Node State Machine: Name/Directory Services States
@defgroup p2p_sm Node State Machine: Point-to-Point Node States
*/
#include "ocs.h"
#include "ocs_fabric.h"
#include "ocs_els.h"
#include "ocs_device.h"
static void ocs_fabric_initiate_shutdown(ocs_node_t *node);
static void * __ocs_fabric_common(const char *funcname, ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg);
static int32_t ocs_start_ns_node(ocs_sport_t *sport);
static int32_t ocs_start_fabctl_node(ocs_sport_t *sport);
static int32_t ocs_process_gidpt_payload(ocs_node_t *node, fcct_gidpt_acc_t *gidpt, uint32_t gidpt_len);
static void ocs_process_rscn(ocs_node_t *node, ocs_node_cb_t *cbdata);
static uint64_t ocs_get_wwpn(fc_plogi_payload_t *sp);
static void gidpt_delay_timer_cb(void *arg);
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Initial state.
*
* @par Description
* Send an FLOGI to a well-known fabric.
*
* @param ctx Remote node sm context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_REENTER: /* not sure why we're getting these ... */
ocs_log_debug(node->ocs, ">>> reenter !!\n");
/* fall through */
case OCS_EVT_ENTER:
/* sm: / send FLOGI */
ocs_send_flogi(node, OCS_FC_FLOGI_TIMEOUT_SEC, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_fabric_flogi_wait_rsp, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Set sport topology.
*
* @par Description
* Set sport topology.
*
* @param node Pointer to the node for which the topology is set.
* @param topology Topology to set.
*
* @return Returns NULL.
*/
void
ocs_fabric_set_topology(ocs_node_t *node, ocs_sport_topology_e topology)
{
node->sport->topology = topology;
}
/**
* @ingroup fabric_sm
* @brief Notify sport topology.
* @par Description
* notify sport topology.
* @param node Pointer to the node for which the topology is set.
* @return Returns NULL.
*/
void
ocs_fabric_notify_topology(ocs_node_t *node)
{
ocs_node_t *tmp_node;
ocs_node_t *next;
ocs_sport_topology_e topology = node->sport->topology;
/* now loop through the nodes in the sport and send topology notification */
ocs_sport_lock(node->sport);
ocs_list_foreach_safe(&node->sport->node_list, tmp_node, next) {
if (tmp_node != node) {
ocs_node_post_event(tmp_node, OCS_EVT_SPORT_TOPOLOGY_NOTIFY, (void *)topology);
}
}
ocs_sport_unlock(node->sport);
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Wait for an FLOGI response.
*
* @par Description
* Wait for an FLOGI response event.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_flogi_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_FLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
ocs_domain_save_sparms(node->sport->domain, cbdata->els->els_rsp.virt);
ocs_display_sparams(node->display_name, "flogi rcvd resp", 0, NULL,
((uint8_t*)cbdata->els->els_rsp.virt) + 4);
/* Check to see if the fabric is an F_PORT or and N_PORT */
if (ocs_rnode_is_nport(cbdata->els->els_rsp.virt)) {
/* sm: if nport and p2p_winner / ocs_domain_attach */
ocs_fabric_set_topology(node, OCS_SPORT_TOPOLOGY_P2P);
if (ocs_p2p_setup(node->sport)) {
node_printf(node, "p2p setup failed, shutting down node\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
} else {
if (node->sport->p2p_winner) {
ocs_node_transition(node, __ocs_p2p_wait_domain_attach, NULL);
if (!node->sport->domain->attached) {
node_printf(node, "p2p winner, domain not attached\n");
ocs_domain_attach(node->sport->domain, node->sport->p2p_port_id);
} else {
/* already attached, just send ATTACH_OK */
node_printf(node, "p2p winner, domain already attached\n");
ocs_node_post_event(node, OCS_EVT_DOMAIN_ATTACH_OK, NULL);
}
} else {
/* peer is p2p winner; PLOGI will be received on the
* remote SID=1 node; this node has served its purpose
*/
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
}
}
} else {
/* sm: if not nport / ocs_domain_attach */
/* ext_status has the fc_id, attach domain */
ocs_fabric_set_topology(node, OCS_SPORT_TOPOLOGY_FABRIC);
ocs_fabric_notify_topology(node);
ocs_assert(!node->sport->domain->attached, NULL);
ocs_domain_attach(node->sport->domain, cbdata->ext_status);
ocs_node_transition(node, __ocs_fabric_wait_domain_attach, NULL);
}
break;
}
case OCS_EVT_ELS_REQ_ABORTED:
case OCS_EVT_SRRS_ELS_REQ_RJT:
case OCS_EVT_SRRS_ELS_REQ_FAIL: {
ocs_sport_t *sport = node->sport;
/*
* with these errors, we have no recovery, so shutdown the sport, leave the link
* up and the domain ready
*/
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_FLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
node_printf(node, "FLOGI failed evt=%s, shutting down sport [%s]\n", ocs_sm_event_name(evt),
sport->display_name);
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
ocs_sm_post_event(&sport->sm, OCS_EVT_SHUTDOWN, NULL);
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Initial state for a virtual port.
*
* @par Description
* State entered when a virtual port is created. Send FDISC.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_vport_fabric_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/* sm: send FDISC */
ocs_send_fdisc(node, OCS_FC_FLOGI_TIMEOUT_SEC, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_fabric_fdisc_wait_rsp, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Wait for an FDISC response
*
* @par Description
* Used for a virtual port. Waits for an FDISC response. If OK, issue a HW port attach.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_fdisc_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
/* fc_id is in ext_status */
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_FDISC, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_display_sparams(node->display_name, "fdisc rcvd resp", 0, NULL,
((uint8_t*)cbdata->els->els_rsp.virt) + 4);
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/* sm: ocs_sport_attach */
ocs_sport_attach(node->sport, cbdata->ext_status);
ocs_node_transition(node, __ocs_fabric_wait_domain_attach, NULL);
break;
}
case OCS_EVT_SRRS_ELS_REQ_RJT:
case OCS_EVT_SRRS_ELS_REQ_FAIL: {
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_FDISC, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
ocs_log_err(ocs, "FDISC failed, shutting down sport\n");
/* sm: shutdown sport */
ocs_sm_post_event(&node->sport->sm, OCS_EVT_SHUTDOWN, NULL);
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Wait for a domain/sport attach event.
*
* @par Description
* Waits for a domain/sport attach event.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_wait_domain_attach(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_DOMAIN_ATTACH_OK:
case OCS_EVT_SPORT_ATTACH_OK: {
int rc;
rc = ocs_start_ns_node(node->sport);
if (rc)
return NULL;
/* sm: if enable_ini / start fabctl node
* Instantiate the fabric controller (sends SCR) */
if (node->sport->enable_rscn) {
rc = ocs_start_fabctl_node(node->sport);
if (rc)
return NULL;
}
ocs_node_transition(node, __ocs_fabric_idle, NULL);
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Fabric node is idle.
*
* @par Description
* Wait for fabric node events.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_idle(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_DOMAIN_ATTACH_OK:
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Initialize.
*
* @par Description
* A PLOGI is sent to the well-known name/directory services node.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/* sm: send PLOGI */
ocs_send_plogi(node, OCS_FC_ELS_SEND_DEFAULT_TIMEOUT, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_plogi_wait_rsp, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Wait for a PLOGI response.
*
* @par Description
* Waits for a response from PLOGI to name services node, then issues a
* node attach request to the HW.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_plogi_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
int32_t rc;
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
/* Save service parameters */
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_PLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/* sm: save sparams, ocs_node_attach */
ocs_node_save_sparms(node, cbdata->els->els_rsp.virt);
ocs_display_sparams(node->display_name, "plogi rcvd resp", 0, NULL,
((uint8_t*)cbdata->els->els_rsp.virt) + 4);
rc = ocs_node_attach(node);
ocs_node_transition(node, __ocs_ns_wait_node_attach, NULL);
if (rc == OCS_HW_RTN_SUCCESS_SYNC) {
ocs_node_post_event(node, OCS_EVT_NODE_ATTACH_OK, NULL);
}
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Wait for a node attach completion.
*
* @par Description
* Waits for a node attach completion, then issues an RFTID name services
* request.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_wait_node_attach(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_NODE_ATTACH_OK:
node->attached = TRUE;
/* sm: send RFTID */
ocs_ns_send_rftid(node, OCS_FC_ELS_CT_SEND_DEFAULT_TIMEOUT,
OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_rftid_wait_rsp, NULL);
break;
case OCS_EVT_NODE_ATTACH_FAIL:
/* node attach failed, shutdown the node */
node->attached = FALSE;
node_printf(node, "Node attach failed\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
case OCS_EVT_SHUTDOWN:
node_printf(node, "Shutdown event received\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_node_transition(node, __ocs_fabric_wait_attach_evt_shutdown, NULL);
break;
/* if receive RSCN just ignore,
* we haven't sent GID_PT yet (ACC sent by fabctl node) */
case OCS_EVT_RSCN_RCVD:
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Wait for a domain/sport/node attach completion, then
* shutdown.
*
* @par Description
* Waits for a domain/sport/node attach completion, then shuts
* node down.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabric_wait_attach_evt_shutdown(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
/* wait for any of these attach events and then shutdown */
case OCS_EVT_NODE_ATTACH_OK:
node->attached = TRUE;
node_printf(node, "Attach evt=%s, proceed to shutdown\n", ocs_sm_event_name(evt));
ocs_fabric_initiate_shutdown(node);
break;
case OCS_EVT_NODE_ATTACH_FAIL:
node->attached = FALSE;
node_printf(node, "Attach evt=%s, proceed to shutdown\n", ocs_sm_event_name(evt));
ocs_fabric_initiate_shutdown(node);
break;
/* ignore shutdown event as we're already in shutdown path */
case OCS_EVT_SHUTDOWN:
node_printf(node, "Shutdown event received\n");
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Wait for an RFTID response event.
*
* @par Description
* Waits for an RFTID response event; if configured for an initiator operation,
* a GIDPT name services request is issued.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_rftid_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK:
if (node_check_ns_req(ctx, evt, arg, FC_GS_NAMESERVER_RFT_ID, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/*sm: send RFFID */
ocs_ns_send_rffid(node, OCS_FC_ELS_CT_SEND_DEFAULT_TIMEOUT,
OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_rffid_wait_rsp, NULL);
break;
/* if receive RSCN just ignore,
* we haven't sent GID_PT yet (ACC sent by fabctl node) */
case OCS_EVT_RSCN_RCVD:
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Fabric node state machine: Wait for RFFID response event.
*
* @par Description
* Waits for an RFFID response event; if configured for an initiator operation,
* a GIDPT name services request is issued.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_rffid_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
if (node_check_ns_req(ctx, evt, arg, FC_GS_NAMESERVER_RFF_ID, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
if (node->sport->enable_rscn) {
/* sm: if enable_rscn / send GIDPT */
ocs_ns_send_gidpt(node, OCS_FC_ELS_CT_SEND_DEFAULT_TIMEOUT,
OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_gidpt_wait_rsp, NULL);
} else {
/* if 'T' only, we're done, go to idle */
ocs_node_transition(node, __ocs_ns_idle, NULL);
}
break;
}
/* if receive RSCN just ignore,
* we haven't sent GID_PT yet (ACC sent by fabctl node) */
case OCS_EVT_RSCN_RCVD:
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Wait for a GIDPT response.
*
* @par Description
* Wait for a GIDPT response from the name server. Process the FC_IDs that are
* reported by creating new remote ports, as needed.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_gidpt_wait_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
if (node_check_ns_req(ctx, evt, arg, FC_GS_NAMESERVER_GID_PT, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/* sm: / process GIDPT payload */
ocs_process_gidpt_payload(node, cbdata->els->els_rsp.virt, cbdata->els->els_rsp.len);
/* TODO: should we logout at this point or just go idle */
ocs_node_transition(node, __ocs_ns_idle, NULL);
break;
}
case OCS_EVT_SRRS_ELS_REQ_FAIL: {
/* not much we can do; will retry with the next RSCN */
node_printf(node, "GID_PT failed to complete\n");
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
ocs_node_transition(node, __ocs_ns_idle, NULL);
break;
}
/* if receive RSCN here, queue up another discovery processing */
case OCS_EVT_RSCN_RCVD: {
node_printf(node, "RSCN received during GID_PT processing\n");
node->rscn_pending = 1;
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Idle state.
*
* @par Description
* Idle. Waiting for RSCN received events (posted from the fabric controller), and
* restarts the GIDPT name services query and processing.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_idle(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
if (!node->rscn_pending) {
break;
}
node_printf(node, "RSCN pending, restart discovery\n");
node->rscn_pending = 0;
/* fall through */
case OCS_EVT_RSCN_RCVD: {
/* sm: / send GIDPT
* If target RSCN processing is enabled, and this is target only
* (not initiator), and tgt_rscn_delay is non-zero,
* then we delay issuing the GID_PT
*/
if ((ocs->tgt_rscn_delay_msec != 0) && !node->sport->enable_ini && node->sport->enable_tgt &&
enable_target_rscn(ocs)) {
ocs_node_transition(node, __ocs_ns_gidpt_delay, NULL);
} else {
ocs_ns_send_gidpt(node, OCS_FC_ELS_CT_SEND_DEFAULT_TIMEOUT,
OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_gidpt_wait_rsp, NULL);
}
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Handle GIDPT delay timer callback
*
* @par Description
* Post an OCS_EVT_GIDPT_DEIALY_EXPIRED event to the passed in node.
*
* @param arg Pointer to node.
*
* @return None.
*/
static void
gidpt_delay_timer_cb(void *arg)
{
ocs_node_t *node = arg;
int32_t rc;
ocs_del_timer(&node->gidpt_delay_timer);
rc = ocs_xport_control(node->ocs->xport, OCS_XPORT_POST_NODE_EVENT, node, OCS_EVT_GIDPT_DELAY_EXPIRED, NULL);
if (rc) {
ocs_log_err(node->ocs, "ocs_xport_control(OCS_XPORT_POST_NODE_EVENT) failed: %d\n", rc);
}
}
/**
* @ingroup ns_sm
* @brief Name services node state machine: Delayed GIDPT.
*
* @par Description
* Waiting for GIDPT delay to expire before submitting GIDPT to name server.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_ns_gidpt_delay(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER: {
time_t delay_msec;
ocs_assert(ocs->tgt_rscn_delay_msec != 0, NULL);
/*
* Compute the delay time. Set to tgt_rscn_delay, if the time since last GIDPT
* is less than tgt_rscn_period, then use tgt_rscn_period.
*/
delay_msec = ocs->tgt_rscn_delay_msec;
if ((ocs_msectime() - node->time_last_gidpt_msec) < ocs->tgt_rscn_period_msec) {
delay_msec = ocs->tgt_rscn_period_msec;
}
ocs_setup_timer(ocs, &node->gidpt_delay_timer, gidpt_delay_timer_cb, node, delay_msec);
break;
}
case OCS_EVT_GIDPT_DELAY_EXPIRED:
node->time_last_gidpt_msec = ocs_msectime();
ocs_ns_send_gidpt(node, OCS_FC_ELS_CT_SEND_DEFAULT_TIMEOUT,
OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_ns_gidpt_wait_rsp, NULL);
break;
case OCS_EVT_RSCN_RCVD: {
ocs_log_debug(ocs, "RSCN received while in GIDPT delay - no action\n");
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric controller node state machine: Initial state.
*
* @par Description
* Issue a PLOGI to a well-known fabric controller address.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabctl_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_t *node = ctx->app;
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/* no need to login to fabric controller, just send SCR */
ocs_send_scr(node, OCS_FC_ELS_SEND_DEFAULT_TIMEOUT, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_fabctl_wait_scr_rsp, NULL);
break;
case OCS_EVT_NODE_ATTACH_OK:
node->attached = TRUE;
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric controller node state machine: Wait for a node attach request
* to complete.
*
* @par Description
* Wait for a node attach to complete. If successful, issue an SCR
* to the fabric controller, subscribing to all RSCN.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*
*/
void *
__ocs_fabctl_wait_node_attach(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_NODE_ATTACH_OK:
node->attached = TRUE;
/* sm: / send SCR */
ocs_send_scr(node, OCS_FC_ELS_SEND_DEFAULT_TIMEOUT, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_fabctl_wait_scr_rsp, NULL);
break;
case OCS_EVT_NODE_ATTACH_FAIL:
/* node attach failed, shutdown the node */
node->attached = FALSE;
node_printf(node, "Node attach failed\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
case OCS_EVT_SHUTDOWN:
node_printf(node, "Shutdown event received\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_node_transition(node, __ocs_fabric_wait_attach_evt_shutdown, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric controller node state machine: Wait for an SCR response from the
* fabric controller.
*
* @par Description
* Waits for an SCR response from the fabric controller.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabctl_wait_scr_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK:
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_SCR, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
ocs_node_transition(node, __ocs_fabctl_ready, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric controller node state machine: Ready.
*
* @par Description
* In this state, the fabric controller sends a RSCN, which is received
* by this node and is forwarded to the name services node object; and
* the RSCN LS_ACC is sent.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabctl_ready(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_RSCN_RCVD: {
fc_header_t *hdr = cbdata->header->dma.virt;
/* sm: / process RSCN (forward to name services node),
* send LS_ACC */
ocs_process_rscn(node, cbdata);
ocs_send_ls_acc(cbdata->io, ocs_be16toh(hdr->ox_id), NULL, NULL);
ocs_node_transition(node, __ocs_fabctl_wait_ls_acc_cmpl, NULL);
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Fabric controller node state machine: Wait for LS_ACC.
*
* @par Description
* Waits for the LS_ACC from the fabric controller.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_fabctl_wait_ls_acc_cmpl(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_SRRS_ELS_CMPL_OK:
ocs_assert(node->els_cmpl_cnt, NULL);
node->els_cmpl_cnt--;
ocs_node_transition(node, __ocs_fabctl_ready, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup fabric_sm
* @brief Initiate fabric node shutdown.
*
* @param node Node for which shutdown is initiated.
*
* @return Returns None.
*/
static void
ocs_fabric_initiate_shutdown(ocs_node_t *node)
{
ocs_hw_rtn_e rc;
ocs_t *ocs = node->ocs;
ocs_scsi_io_alloc_disable(node);
if (node->attached) {
/* issue hw node free; don't care if succeeds right away
* or sometime later, will check node->attached later in
* shutdown process
*/
rc = ocs_hw_node_detach(&ocs->hw, &node->rnode);
if (node->rnode.free_group) {
ocs_remote_node_group_free(node->node_group);
node->node_group = NULL;
node->rnode.free_group = FALSE;
}
if (rc != OCS_HW_RTN_SUCCESS && rc != OCS_HW_RTN_SUCCESS_SYNC) {
node_printf(node, "Failed freeing HW node, rc=%d\n", rc);
}
}
/*
* node has either been detached or is in the process of being detached,
* call common node's initiate cleanup function
*/
ocs_node_initiate_cleanup(node);
}
/**
* @ingroup fabric_sm
* @brief Fabric node state machine: Handle the common fabric node events.
*
* @param funcname Function name text.
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
static void *
__ocs_fabric_common(const char *funcname, ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_t *node = NULL;
ocs_assert(ctx, NULL);
ocs_assert(ctx->app, NULL);
node = ctx->app;
switch(evt) {
case OCS_EVT_DOMAIN_ATTACH_OK:
break;
case OCS_EVT_SHUTDOWN:
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
default:
/* call default event handler common to all nodes */
__ocs_node_common(funcname, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Return TRUE if the remote node is an NPORT.
*
* @par Description
* Examines the service parameters. Returns TRUE if the node reports itself as
* an NPORT.
*
* @param remote_sparms Remote node service parameters.
*
* @return Returns TRUE if NPORT.
*/
int32_t
ocs_rnode_is_nport(fc_plogi_payload_t *remote_sparms)
{
return (ocs_be32toh(remote_sparms->common_service_parameters[1]) & (1U << 28)) == 0;
}
/**
* @brief Return the node's WWPN as an uint64_t.
*
* @par Description
* The WWPN is computed from service parameters, and returned as a uint64_t.
*
* @param sp Pointer to service parameters.
*
* @return Returns WWPN.
*
*/
static uint64_t
ocs_get_wwpn(fc_plogi_payload_t *sp)
{
return (((uint64_t)ocs_be32toh(sp->port_name_hi) << 32ll) | (ocs_be32toh(sp->port_name_lo)));
}
/**
* @brief Return TRUE if the remote node is the point-to-point winner.
*
* @par Description
* Compares WWPNs. Returns TRUE if the remote node's WWPN is numerically
* higher than the local node's WWPN.
*
* @param sport Pointer to the sport object.
*
* @return
* - 0, if the remote node is the loser.
* - 1, if the remote node is the winner.
* - (-1), if remote node is neither the loser nor the winner
* (WWPNs match)
*/
static int32_t
ocs_rnode_is_winner(ocs_sport_t *sport)
{
fc_plogi_payload_t *remote_sparms = (fc_plogi_payload_t*) sport->domain->flogi_service_params;
uint64_t remote_wwpn = ocs_get_wwpn(remote_sparms);
uint64_t local_wwpn = sport->wwpn;
char prop_buf[32];
uint64_t wwn_bump = 0;
if (ocs_get_property("wwn_bump", prop_buf, sizeof(prop_buf)) == 0) {
wwn_bump = ocs_strtoull(prop_buf, 0, 0);
}
local_wwpn ^= wwn_bump;
remote_wwpn = ocs_get_wwpn(remote_sparms);
ocs_log_debug(sport->ocs, "r: %08x %08x\n", ocs_be32toh(remote_sparms->port_name_hi), ocs_be32toh(remote_sparms->port_name_lo));
ocs_log_debug(sport->ocs, "l: %08x %08x\n", (uint32_t) (local_wwpn >> 32ll), (uint32_t) local_wwpn);
if (remote_wwpn == local_wwpn) {
ocs_log_warn(sport->ocs, "WWPN of remote node [%08x %08x] matches local WWPN\n",
(uint32_t) (local_wwpn >> 32ll), (uint32_t) local_wwpn);
return (-1);
}
return (remote_wwpn > local_wwpn);
}
/**
* @ingroup p2p_sm
* @brief Point-to-point state machine: Wait for the domain attach to complete.
*
* @par Description
* Once the domain attach has completed, a PLOGI is sent (if we're the
* winning point-to-point node).
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_wait_domain_attach(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_DOMAIN_ATTACH_OK: {
ocs_sport_t *sport = node->sport;
ocs_node_t *rnode;
/* this transient node (SID=0 (recv'd FLOGI) or DID=fabric (sent FLOGI))
* is the p2p winner, will use a separate node to send PLOGI to peer
*/
ocs_assert (node->sport->p2p_winner, NULL);
rnode = ocs_node_find(sport, node->sport->p2p_remote_port_id);
if (rnode != NULL) {
/* the "other" transient p2p node has already kicked off the
* new node from which PLOGI is sent */
node_printf(node, "Node with fc_id x%x already exists\n", rnode->rnode.fc_id);
ocs_assert (rnode != node, NULL);
} else {
/* create new node (SID=1, DID=2) from which to send PLOGI */
rnode = ocs_node_alloc(sport, sport->p2p_remote_port_id, FALSE, FALSE);
if (rnode == NULL) {
ocs_log_err(ocs, "node alloc failed\n");
return NULL;
}
ocs_fabric_notify_topology(node);
/* sm: allocate p2p remote node */
ocs_node_transition(rnode, __ocs_p2p_rnode_init, NULL);
}
/* the transient node (SID=0 or DID=fabric) has served its purpose */
if (node->rnode.fc_id == 0) {
/* if this is the SID=0 node, move to the init state in case peer
* has restarted FLOGI discovery and FLOGI is pending
*/
/* don't send PLOGI on ocs_d_init entry */
ocs_node_init_device(node, FALSE);
} else {
/* if this is the DID=fabric node (we initiated FLOGI), shut it down */
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
}
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup p2p_sm
* @brief Point-to-point state machine: Remote node initialization state.
*
* @par Description
* This state is entered after winning point-to-point, and the remote node
* is instantiated.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_rnode_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/* sm: / send PLOGI */
ocs_send_plogi(node, OCS_FC_ELS_SEND_DEFAULT_TIMEOUT, OCS_FC_ELS_DEFAULT_RETRIES, NULL, NULL);
ocs_node_transition(node, __ocs_p2p_wait_plogi_rsp, NULL);
break;
case OCS_EVT_ABTS_RCVD:
/* sm: send BA_ACC */
ocs_bls_send_acc_hdr(cbdata->io, cbdata->header->dma.virt);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup p2p_sm
* @brief Point-to-point node state machine: Wait for the FLOGI accept completion.
*
* @par Description
* Wait for the FLOGI accept completion.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_wait_flogi_acc_cmpl(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_SRRS_ELS_CMPL_OK:
ocs_assert(node->els_cmpl_cnt, NULL);
node->els_cmpl_cnt--;
/* sm: if p2p_winner / domain_attach */
if (node->sport->p2p_winner) {
ocs_node_transition(node, __ocs_p2p_wait_domain_attach, NULL);
if (node->sport->domain->attached &&
!(node->sport->domain->domain_notify_pend)) {
node_printf(node, "Domain already attached\n");
ocs_node_post_event(node, OCS_EVT_DOMAIN_ATTACH_OK, NULL);
}
} else {
/* this node has served its purpose; we'll expect a PLOGI on a separate
* node (remote SID=0x1); return this node to init state in case peer
* restarts discovery -- it may already have (pending frames may exist).
*/
/* don't send PLOGI on ocs_d_init entry */
ocs_node_init_device(node, FALSE);
}
break;
case OCS_EVT_SRRS_ELS_CMPL_FAIL:
/* LS_ACC failed, possibly due to link down; shutdown node and wait
* for FLOGI discovery to restart */
node_printf(node, "FLOGI LS_ACC failed, shutting down\n");
ocs_assert(node->els_cmpl_cnt, NULL);
node->els_cmpl_cnt--;
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
case OCS_EVT_ABTS_RCVD: {
/* sm: / send BA_ACC */
ocs_bls_send_acc_hdr(cbdata->io, cbdata->header->dma.virt);
break;
}
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup p2p_sm
* @brief Point-to-point node state machine: Wait for a PLOGI response
* as a point-to-point winner.
*
* @par Description
* Wait for a PLOGI response from the remote node as a point-to-point winner.
* Submit node attach request to the HW.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_wait_plogi_rsp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
int32_t rc;
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_PLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/* sm: / save sparams, ocs_node_attach */
ocs_node_save_sparms(node, cbdata->els->els_rsp.virt);
rc = ocs_node_attach(node);
ocs_node_transition(node, __ocs_p2p_wait_node_attach, NULL);
if (rc == OCS_HW_RTN_SUCCESS_SYNC) {
ocs_node_post_event(node, OCS_EVT_NODE_ATTACH_OK, NULL);
}
break;
}
case OCS_EVT_SRRS_ELS_REQ_FAIL: {
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_PLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
node_printf(node, "PLOGI failed, shutting down\n");
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
}
case OCS_EVT_PLOGI_RCVD: {
fc_header_t *hdr = cbdata->header->dma.virt;
/* if we're in external loopback mode, just send LS_ACC */
if (node->ocs->external_loopback) {
ocs_send_plogi_acc(cbdata->io, ocs_be16toh(hdr->ox_id), NULL, NULL);
break;
} else{
/* if this isn't external loopback, pass to default handler */
__ocs_fabric_common(__func__, ctx, evt, arg);
}
break;
}
case OCS_EVT_PRLI_RCVD:
/* I, or I+T */
/* sent PLOGI and before completion was seen, received the
* PRLI from the remote node (WCQEs and RCQEs come in on
* different queues and order of processing cannot be assumed)
* Save OXID so PRLI can be sent after the attach and continue
* to wait for PLOGI response
*/
ocs_process_prli_payload(node, cbdata->payload->dma.virt);
ocs_send_ls_acc_after_attach(cbdata->io, cbdata->header->dma.virt, OCS_NODE_SEND_LS_ACC_PRLI);
ocs_node_transition(node, __ocs_p2p_wait_plogi_rsp_recvd_prli, NULL);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup p2p_sm
* @brief Point-to-point node state machine: Waiting on a response for a
* sent PLOGI.
*
* @par Description
* State is entered when the point-to-point winner has sent
* a PLOGI and is waiting for a response. Before receiving the
* response, a PRLI was received, implying that the PLOGI was
* successful.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_wait_plogi_rsp_recvd_prli(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
int32_t rc;
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/*
* Since we've received a PRLI, we have a port login and will
* just need to wait for the PLOGI response to do the node
* attach and then we can send the LS_ACC for the PRLI. If,
* during this time, we receive FCP_CMNDs (which is possible
* since we've already sent a PRLI and our peer may have accepted).
* At this time, we are not waiting on any other unsolicited
* frames to continue with the login process. Thus, it will not
* hurt to hold frames here.
*/
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_SRRS_ELS_REQ_OK: /* PLOGI response received */
/* Completion from PLOGI sent */
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_PLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
/* sm: / save sparams, ocs_node_attach */
ocs_node_save_sparms(node, cbdata->els->els_rsp.virt);
ocs_display_sparams(node->display_name, "plogi rcvd resp", 0, NULL,
((uint8_t*)cbdata->els->els_rsp.virt) + 4);
rc = ocs_node_attach(node);
ocs_node_transition(node, __ocs_p2p_wait_node_attach, NULL);
if (rc == OCS_HW_RTN_SUCCESS_SYNC) {
ocs_node_post_event(node, OCS_EVT_NODE_ATTACH_OK, NULL);
}
break;
case OCS_EVT_SRRS_ELS_REQ_FAIL: /* PLOGI response received */
case OCS_EVT_SRRS_ELS_REQ_RJT:
/* PLOGI failed, shutdown the node */
if (node_check_els_req(ctx, evt, arg, FC_ELS_CMD_PLOGI, __ocs_fabric_common, __func__)) {
return NULL;
}
ocs_assert(node->els_req_cnt, NULL);
node->els_req_cnt--;
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @ingroup p2p_sm
* @brief Point-to-point node state machine: Wait for a point-to-point node attach
* to complete.
*
* @par Description
* Waits for the point-to-point node attach to complete.
*
* @param ctx Remote node state machine context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_p2p_wait_node_attach(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_node_cb_t *cbdata = arg;
std_node_state_decl();
node_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_node_hold_frames(node);
break;
case OCS_EVT_EXIT:
ocs_node_accept_frames(node);
break;
case OCS_EVT_NODE_ATTACH_OK:
node->attached = TRUE;
switch (node->send_ls_acc) {
case OCS_NODE_SEND_LS_ACC_PRLI: {
ocs_d_send_prli_rsp(node->ls_acc_io, node->ls_acc_oxid);
node->send_ls_acc = OCS_NODE_SEND_LS_ACC_NONE;
node->ls_acc_io = NULL;
break;
}
case OCS_NODE_SEND_LS_ACC_PLOGI: /* Can't happen in P2P */
case OCS_NODE_SEND_LS_ACC_NONE:
default:
/* Normal case for I */
/* sm: send_plogi_acc is not set / send PLOGI acc */
ocs_node_transition(node, __ocs_d_port_logged_in, NULL);
break;
}
break;
case OCS_EVT_NODE_ATTACH_FAIL:
/* node attach failed, shutdown the node */
node->attached = FALSE;
node_printf(node, "Node attach failed\n");
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_fabric_initiate_shutdown(node);
break;
case OCS_EVT_SHUTDOWN:
node_printf(node, "%s received\n", ocs_sm_event_name(evt));
node->shutdown_reason = OCS_NODE_SHUTDOWN_DEFAULT;
ocs_node_transition(node, __ocs_fabric_wait_attach_evt_shutdown, NULL);
break;
case OCS_EVT_PRLI_RCVD:
node_printf(node, "%s: PRLI received before node is attached\n", ocs_sm_event_name(evt));
ocs_process_prli_payload(node, cbdata->payload->dma.virt);
ocs_send_ls_acc_after_attach(cbdata->io, cbdata->header->dma.virt, OCS_NODE_SEND_LS_ACC_PRLI);
break;
default:
__ocs_fabric_common(__func__, ctx, evt, arg);
return NULL;
}
return NULL;
}
/**
* @brief Start up the name services node.
*
* @par Description
* Allocates and starts up the name services node.
*
* @param sport Pointer to the sport structure.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_start_ns_node(ocs_sport_t *sport)
{
ocs_node_t *ns;
/* Instantiate a name services node */
ns = ocs_node_find(sport, FC_ADDR_NAMESERVER);
if (ns == NULL) {
ns = ocs_node_alloc(sport, FC_ADDR_NAMESERVER, FALSE, FALSE);
if (ns == NULL) {
return -1;
}
}
/* TODO: for found ns, should we be transitioning from here?
* breaks transition only 1. from within state machine or
* 2. if after alloc
*/
if (ns->ocs->nodedb_mask & OCS_NODEDB_PAUSE_NAMESERVER) {
ocs_node_pause(ns, __ocs_ns_init);
} else {
ocs_node_transition(ns, __ocs_ns_init, NULL);
}
return 0;
}
/**
* @brief Start up the fabric controller node.
*
* @par Description
* Allocates and starts up the fabric controller node.
*
* @param sport Pointer to the sport structure.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_start_fabctl_node(ocs_sport_t *sport)
{
ocs_node_t *fabctl;
fabctl = ocs_node_find(sport, FC_ADDR_CONTROLLER);
if (fabctl == NULL) {
fabctl = ocs_node_alloc(sport, FC_ADDR_CONTROLLER, FALSE, FALSE);
if (fabctl == NULL) {
return -1;
}
}
/* TODO: for found ns, should we be transitioning from here?
* breaks transition only 1. from within state machine or
* 2. if after alloc
*/
ocs_node_transition(fabctl, __ocs_fabctl_init, NULL);
return 0;
}
/**
* @brief Process the GIDPT payload.
*
* @par Description
* The GIDPT payload is parsed, and new nodes are created, as needed.
*
* @param node Pointer to the node structure.
* @param gidpt Pointer to the GIDPT payload.
* @param gidpt_len Payload length
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_process_gidpt_payload(ocs_node_t *node, fcct_gidpt_acc_t *gidpt, uint32_t gidpt_len)
{
uint32_t i;
uint32_t j;
ocs_node_t *newnode;
ocs_sport_t *sport = node->sport;
ocs_t *ocs = node->ocs;
uint32_t port_id;
uint32_t port_count;
ocs_node_t *n;
ocs_node_t **active_nodes;
uint32_t portlist_count;
uint16_t residual;
residual = ocs_be16toh(gidpt->hdr.max_residual_size);
if (residual != 0) {
ocs_log_debug(node->ocs, "residual is %u words\n", residual);
}
if (ocs_be16toh(gidpt->hdr.cmd_rsp_code) == FCCT_HDR_CMDRSP_REJECT) {
node_printf(node, "GIDPT request failed: rsn x%x rsn_expl x%x\n",
gidpt->hdr.reason_code, gidpt->hdr.reason_code_explanation);
return -1;
}
portlist_count = (gidpt_len - sizeof(fcct_iu_header_t)) / sizeof(gidpt->port_list);
/* Count the number of nodes */
port_count = 0;
ocs_sport_lock(sport);
ocs_list_foreach(&sport->node_list, n) {
port_count ++;
}
/* Allocate a buffer for all nodes */
active_nodes = ocs_malloc(node->ocs, port_count * sizeof(*active_nodes), OCS_M_NOWAIT | OCS_M_ZERO);
if (active_nodes == NULL) {
node_printf(node, "ocs_malloc failed\n");
ocs_sport_unlock(sport);
return -1;
}
/* Fill buffer with fc_id of active nodes */
i = 0;
ocs_list_foreach(&sport->node_list, n) {
port_id = n->rnode.fc_id;
switch (port_id) {
case FC_ADDR_FABRIC:
case FC_ADDR_CONTROLLER:
case FC_ADDR_NAMESERVER:
break;
default:
if (!FC_ADDR_IS_DOMAIN_CTRL(port_id)) {
active_nodes[i++] = n;
}
break;
}
}
/* update the active nodes buffer */
for (i = 0; i < portlist_count; i ++) {
port_id = fc_be24toh(gidpt->port_list[i].port_id);
for (j = 0; j < port_count; j ++) {
if ((active_nodes[j] != NULL) && (port_id == active_nodes[j]->rnode.fc_id)) {
active_nodes[j] = NULL;
}
}
if (gidpt->port_list[i].ctl & FCCT_GID_PT_LAST_ID)
break;
}
/* Those remaining in the active_nodes[] are now gone ! */
for (i = 0; i < port_count; i ++) {
/* if we're an initiator and the remote node is a target, then
* post the node missing event. if we're target and we have enabled
* target RSCN, then post the node missing event.
*/
if (active_nodes[i] != NULL) {
if ((node->sport->enable_ini && active_nodes[i]->targ) ||
(node->sport->enable_tgt && enable_target_rscn(ocs))) {
ocs_node_post_event(active_nodes[i], OCS_EVT_NODE_MISSING, NULL);
} else {
node_printf(node, "GID_PT: skipping non-tgt port_id x%06x\n",
active_nodes[i]->rnode.fc_id);
}
}
}
ocs_free(ocs, active_nodes, port_count * sizeof(*active_nodes));
for(i = 0; i < portlist_count; i ++) {
uint32_t port_id = fc_be24toh(gidpt->port_list[i].port_id);
/* node_printf(node, "GID_PT: port_id x%06x\n", port_id); */
/* Don't create node for ourselves or the associated NPIV ports */
if (port_id != node->rnode.sport->fc_id && !ocs_sport_find(sport->domain, port_id)) {
newnode = ocs_node_find(sport, port_id);
if (newnode) {
/* TODO: what if node deleted here?? */
if (node->sport->enable_ini && newnode->targ) {
ocs_node_post_event(newnode, OCS_EVT_NODE_REFOUND, NULL);
}
/* original code sends ADISC, has notion of "refound" */
} else {
if (node->sport->enable_ini) {
newnode = ocs_node_alloc(sport, port_id, 0, 0);
if (newnode == NULL) {
ocs_log_err(ocs, "ocs_node_alloc() failed\n");
ocs_sport_unlock(sport);
return -1;
}
/* send PLOGI automatically if initiator */
ocs_node_init_device(newnode, TRUE);
}
}
}
if (gidpt->port_list[i].ctl & FCCT_GID_PT_LAST_ID) {
break;
}
}
ocs_sport_unlock(sport);
return 0;
}
/**
* @brief Set up the domain point-to-point parameters.
*
* @par Description
* The remote node service parameters are examined, and various point-to-point
* variables are set.
*
* @param sport Pointer to the sport object.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
int32_t
ocs_p2p_setup(ocs_sport_t *sport)
{
ocs_t *ocs = sport->ocs;
int32_t rnode_winner;
rnode_winner = ocs_rnode_is_winner(sport);
/* set sport flags to indicate p2p "winner" */
if (rnode_winner == 1) {
sport->p2p_remote_port_id = 0;
sport->p2p_port_id = 0;
sport->p2p_winner = FALSE;
} else if (rnode_winner == 0) {
sport->p2p_remote_port_id = 2;
sport->p2p_port_id = 1;
sport->p2p_winner = TRUE;
} else {
/* no winner; only okay if external loopback enabled */
if (sport->ocs->external_loopback) {
/*
* External loopback mode enabled; local sport and remote node
* will be registered with an NPortID = 1;
*/
ocs_log_debug(ocs, "External loopback mode enabled\n");
sport->p2p_remote_port_id = 1;
sport->p2p_port_id = 1;
sport->p2p_winner = TRUE;
} else {
ocs_log_warn(ocs, "failed to determine p2p winner\n");
return rnode_winner;
}
}
return 0;
}
/**
* @brief Process the FABCTL node RSCN.
*
* <h3 class="desc">Description</h3>
* Processes the FABCTL node RSCN payload, simply passes the event to the name server.
*
* @param node Pointer to the node structure.
* @param cbdata Callback data to pass forward.
*
* @return None.
*/
static void
ocs_process_rscn(ocs_node_t *node, ocs_node_cb_t *cbdata)
{
ocs_t *ocs = node->ocs;
ocs_sport_t *sport = node->sport;
ocs_node_t *ns;
/* Forward this event to the name-services node */
ns = ocs_node_find(sport, FC_ADDR_NAMESERVER);
if (ns != NULL) {
ocs_node_post_event(ns, OCS_EVT_RSCN_RCVD, cbdata);
} else {
ocs_log_warn(ocs, "can't find name server node\n");
}
}