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freebsd-skq/sys/dev/ocs_fc/ocs_els.c
Mateusz Guzik 98d835ae88 ocs_fc: clean up empty lines in .c and .h files
2020-09-01 22:02:12 +00:00

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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
* Functions to build and send ELS/CT/BLS commands and responses.
*/
/*!
@defgroup els_api ELS/BLS/CT Command and Response Functions
*/
#include "ocs.h"
#include "ocs_els.h"
#include "ocs_scsi.h"
#include "ocs_device.h"
#define ELS_IOFMT "[i:%04x t:%04x h:%04x]"
#define ELS_IOFMT_ARGS(els) els->init_task_tag, els->tgt_task_tag, els->hw_tag
#define node_els_trace() \
do { \
if (OCS_LOG_ENABLE_ELS_TRACE(ocs)) \
ocs_log_info(ocs, "[%s] %-20s\n", node->display_name, __func__); \
} while (0)
#define els_io_printf(els, fmt, ...) \
ocs_log_debug(els->node->ocs, "[%s]" ELS_IOFMT " %-8s " fmt, els->node->display_name, ELS_IOFMT_ARGS(els), els->display_name, ##__VA_ARGS__);
static int32_t ocs_els_send(ocs_io_t *els, uint32_t reqlen, uint32_t timeout_sec, ocs_hw_srrs_cb_t cb);
static int32_t ocs_els_send_rsp(ocs_io_t *els, uint32_t rsplen);
static int32_t ocs_els_acc_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *arg);
static ocs_io_t *ocs_bls_send_acc(ocs_io_t *io, uint32_t s_id, uint16_t ox_id, uint16_t rx_id);
static int32_t ocs_bls_send_acc_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length,
int32_t status, uint32_t ext_status, void *app);
static void ocs_io_transition(ocs_io_t *els, ocs_sm_function_t state, void *data);
static ocs_io_t *ocs_els_abort_io(ocs_io_t *els, int send_abts);
static void _ocs_els_io_free(void *arg);
static void ocs_els_delay_timer_cb(void *arg);
/**
* @ingroup els_api
* @brief ELS state machine transition wrapper.
*
* <h3 class="desc">Description</h3>
* This function is the transition wrapper for the ELS state machine. It grabs
* the node lock prior to making the transition to protect
* against multiple threads accessing a particular ELS. For example,
* one thread transitioning from __els_init to
* __ocs_els_wait_resp and another thread (tasklet) handling the
* completion of that ELS request.
*
* @param els Pointer to the IO context.
* @param state State to transition to.
* @param data Data to pass in with the transition.
*
* @return None.
*/
static void
ocs_io_transition(ocs_io_t *els, ocs_sm_function_t state, void *data)
{
/* protect ELS events with node lock */
ocs_node_t *node = els->node;
ocs_node_lock(node);
ocs_sm_transition(&els->els_sm, state, data);
ocs_node_unlock(node);
}
/**
* @ingroup els_api
* @brief ELS state machine post event wrapper.
*
* <h3 class="desc">Description</h3>
* Post an event wrapper for the ELS state machine. This function grabs
* the node lock prior to posting the event.
*
* @param els Pointer to the IO context.
* @param evt Event to process.
* @param data Data to pass in with the transition.
*
* @return None.
*/
void
ocs_els_post_event(ocs_io_t *els, ocs_sm_event_t evt, void *data)
{
/* protect ELS events with node lock */
ocs_node_t *node = els->node;
ocs_node_lock(node);
els->els_evtdepth ++;
ocs_sm_post_event(&els->els_sm, evt, data);
els->els_evtdepth --;
ocs_node_unlock(node);
if (els->els_evtdepth == 0 && els->els_req_free) {
ocs_els_io_free(els);
}
}
/**
* @ingroup els_api
* @brief Allocate an IO structure for an ELS IO context.
*
* <h3 class="desc">Description</h3>
* Allocate an IO for an ELS context. Uses OCS_ELS_RSP_LEN as response size.
*
* @param node node to associate ELS IO with
* @param reqlen Length of ELS request
* @param role Role of ELS (originator/responder)
*
* @return pointer to IO structure allocated
*/
ocs_io_t *
ocs_els_io_alloc(ocs_node_t *node, uint32_t reqlen, ocs_els_role_e role)
{
return ocs_els_io_alloc_size(node, reqlen, OCS_ELS_RSP_LEN, role);
}
/**
* @ingroup els_api
* @brief Allocate an IO structure for an ELS IO context.
*
* <h3 class="desc">Description</h3>
* Allocate an IO for an ELS context, allowing the caller to specify the size of the response.
*
* @param node node to associate ELS IO with
* @param reqlen Length of ELS request
* @param rsplen Length of ELS response
* @param role Role of ELS (originator/responder)
*
* @return pointer to IO structure allocated
*/
ocs_io_t *
ocs_els_io_alloc_size(ocs_node_t *node, uint32_t reqlen, uint32_t rsplen, ocs_els_role_e role)
{
ocs_t *ocs;
ocs_xport_t *xport;
ocs_io_t *els;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs = node->ocs;
ocs_assert(ocs->xport, NULL);
xport = ocs->xport;
ocs_lock(&node->active_ios_lock);
if (!node->io_alloc_enabled) {
ocs_log_debug(ocs, "called with io_alloc_enabled = FALSE\n");
ocs_unlock(&node->active_ios_lock);
return NULL;
}
els = ocs_io_alloc(ocs);
if (els == NULL) {
ocs_atomic_add_return(&xport->io_alloc_failed_count, 1);
ocs_unlock(&node->active_ios_lock);
return NULL;
}
/* initialize refcount */
ocs_ref_init(&els->ref, _ocs_els_io_free, els);
switch (role) {
case OCS_ELS_ROLE_ORIGINATOR:
els->cmd_ini = TRUE;
els->cmd_tgt = FALSE;
break;
case OCS_ELS_ROLE_RESPONDER:
els->cmd_ini = FALSE;
els->cmd_tgt = TRUE;
break;
}
/* IO should not have an associated HW IO yet. Assigned below. */
if (els->hio != NULL) {
ocs_log_err(ocs, "assertion failed. HIO is not null\n");
ocs_io_free(ocs, els);
ocs_unlock(&node->active_ios_lock);
return NULL;
}
/* populate generic io fields */
els->ocs = ocs;
els->node = node;
/* set type and ELS-specific fields */
els->io_type = OCS_IO_TYPE_ELS;
els->display_name = "pending";
if (reqlen > OCS_ELS_REQ_LEN) {
ocs_log_err(ocs, "ELS command request len greater than allocated\n");
ocs_io_free(ocs, els);
ocs_unlock(&node->active_ios_lock);
return NULL;
}
if (rsplen > OCS_ELS_GID_PT_RSP_LEN) {
ocs_log_err(ocs, "ELS command response len: %d "
"greater than allocated\n", rsplen);
ocs_io_free(ocs, els);
ocs_unlock(&node->active_ios_lock);
return NULL;
}
els->els_req.size = reqlen;
els->els_rsp.size = rsplen;
if (els != NULL) {
ocs_memset(&els->els_sm, 0, sizeof(els->els_sm));
els->els_sm.app = els;
/* initialize fields */
els->els_retries_remaining = OCS_FC_ELS_DEFAULT_RETRIES;
els->els_evtdepth = 0;
els->els_pend = 0;
els->els_active = 0;
/* add els structure to ELS IO list */
ocs_list_add_tail(&node->els_io_pend_list, els);
els->els_pend = 1;
}
ocs_unlock(&node->active_ios_lock);
return els;
}
/**
* @ingroup els_api
* @brief Free IO structure for an ELS IO context.
*
* <h3 class="desc">Description</h3> Free IO for an ELS
* IO context
*
* @param els ELS IO structure for which IO is allocated
*
* @return None
*/
void
ocs_els_io_free(ocs_io_t *els)
{
ocs_ref_put(&els->ref);
}
/**
* @ingroup els_api
* @brief Free IO structure for an ELS IO context.
*
* <h3 class="desc">Description</h3> Free IO for an ELS
* IO context
*
* @param arg ELS IO structure for which IO is allocated
*
* @return None
*/
static void
_ocs_els_io_free(void *arg)
{
ocs_io_t *els = (ocs_io_t *)arg;
ocs_t *ocs;
ocs_node_t *node;
int send_empty_event = FALSE;
ocs_assert(els);
ocs_assert(els->node);
ocs_assert(els->node->ocs);
ocs = els->node->ocs;
node = els->node;
ocs = node->ocs;
ocs_lock(&node->active_ios_lock);
if (els->els_active) {
/* if active, remove from active list and check empty */
ocs_list_remove(&node->els_io_active_list, els);
/* Send list empty event if the IO allocator is disabled, and the list is empty
* If node->io_alloc_enabled was not checked, the event would be posted continually
*/
send_empty_event = (!node->io_alloc_enabled) && ocs_list_empty(&node->els_io_active_list);
els->els_active = 0;
} else if (els->els_pend) {
/* if pending, remove from pending list; node shutdown isn't
* gated off the pending list (only the active list), so no
* need to check if pending list is empty
*/
ocs_list_remove(&node->els_io_pend_list, els);
els->els_pend = 0;
} else {
ocs_log_err(ocs, "assertion failed: niether els->els_pend nor els->active set\n");
ocs_unlock(&node->active_ios_lock);
return;
}
ocs_unlock(&node->active_ios_lock);
ocs_io_free(ocs, els);
if (send_empty_event) {
ocs_node_post_event(node, OCS_EVT_ALL_CHILD_NODES_FREE, NULL);
}
ocs_scsi_check_pending(ocs);
}
/**
* @ingroup els_api
* @brief Make ELS IO active
*
* @param els Pointer to the IO context to make active.
*
* @return Returns 0 on success; or a negative error code value on failure.
*/
static void
ocs_els_make_active(ocs_io_t *els)
{
ocs_node_t *node = els->node;
/* move ELS from pending list to active list */
ocs_lock(&node->active_ios_lock);
if (els->els_pend) {
if (els->els_active) {
ocs_log_err(node->ocs, "assertion failed: both els->els_pend and els->active set\n");
ocs_unlock(&node->active_ios_lock);
return;
} else {
/* remove from pending list */
ocs_list_remove(&node->els_io_pend_list, els);
els->els_pend = 0;
/* add els structure to ELS IO list */
ocs_list_add_tail(&node->els_io_active_list, els);
els->els_active = 1;
}
} else {
/* must be retrying; make sure it's already active */
if (!els->els_active) {
ocs_log_err(node->ocs, "assertion failed: niether els->els_pend nor els->active set\n");
}
}
ocs_unlock(&node->active_ios_lock);
}
/**
* @ingroup els_api
* @brief Send the ELS command.
*
* <h3 class="desc">Description</h3>
* The command, given by the \c els IO context, is sent to the node that the IO was
* configured with, using ocs_hw_srrs_send(). Upon completion,
* the \c cb callback is invoked,
* with the application-specific argument set to the \c els IO context.
*
* @param els Pointer to the IO context.
* @param reqlen Byte count in the payload to send.
* @param timeout_sec Command timeout, in seconds (0 -> 2*R_A_TOV).
* @param cb Completion callback.
*
* @return Returns 0 on success; or a negative error code value on failure.
*/
static int32_t
ocs_els_send(ocs_io_t *els, uint32_t reqlen, uint32_t timeout_sec, ocs_hw_srrs_cb_t cb)
{
ocs_node_t *node = els->node;
/* update ELS request counter */
node->els_req_cnt++;
/* move ELS from pending list to active list */
ocs_els_make_active(els);
els->wire_len = reqlen;
return ocs_scsi_io_dispatch(els, cb);
}
/**
* @ingroup els_api
* @brief Send the ELS response.
*
* <h3 class="desc">Description</h3>
* The ELS response, given by the \c els IO context, is sent to the node
* that the IO was configured with, using ocs_hw_srrs_send().
*
* @param els Pointer to the IO context.
* @param rsplen Byte count in the payload to send.
*
* @return Returns 0 on success; or a negative error value on failure.
*/
static int32_t
ocs_els_send_rsp(ocs_io_t *els, uint32_t rsplen)
{
ocs_node_t *node = els->node;
/* increment ELS completion counter */
node->els_cmpl_cnt++;
/* move ELS from pending list to active list */
ocs_els_make_active(els);
els->wire_len = rsplen;
return ocs_scsi_io_dispatch(els, ocs_els_acc_cb);
}
/**
* @ingroup els_api
* @brief Handle ELS IO request completions.
*
* <h3 class="desc">Description</h3>
* This callback is used for several ELS send operations.
*
* @param hio Pointer to the HW IO context that completed.
* @param rnode Pointer to the remote node.
* @param length Length of the returned payload data.
* @param status Status of the completion.
* @param ext_status Extended status of the completion.
* @param arg Application-specific argument (generally a pointer to the ELS IO context).
*
* @return Returns 0 on success; or a negative error value on failure.
*/
static int32_t
ocs_els_req_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *arg)
{
ocs_io_t *els;
ocs_node_t *node;
ocs_t *ocs;
ocs_node_cb_t cbdata;
ocs_io_t *io;
ocs_assert(arg, -1);
io = arg;
els = io;
ocs_assert(els, -1);
ocs_assert(els->node, -1);
node = els->node;
ocs_assert(node->ocs, -1);
ocs = node->ocs;
ocs_assert(io->hio, -1);
ocs_assert(hio == io->hio, -1);
if (status != 0) {
els_io_printf(els, "status x%x ext x%x\n", status, ext_status);
}
/* set the response len element of els->rsp */
els->els_rsp.len = length;
cbdata.status = status;
cbdata.ext_status = ext_status;
cbdata.header = NULL;
cbdata.els = els;
/* FW returns the number of bytes received on the link in
* the WCQE, not the amount placed in the buffer; use this info to
* check if there was an overrun.
*/
if (length > els->els_rsp.size) {
ocs_log_warn(ocs, "ELS response returned len=%d > buflen=%zu\n",
length, els->els_rsp.size);
ocs_els_post_event(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &cbdata);
return 0;
}
/* Post event to ELS IO object */
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
ocs_els_post_event(els, OCS_EVT_SRRS_ELS_REQ_OK, &cbdata);
break;
case SLI4_FC_WCQE_STATUS_LS_RJT:
ocs_els_post_event(els, OCS_EVT_SRRS_ELS_REQ_RJT, &cbdata);
break;
case SLI4_FC_WCQE_STATUS_LOCAL_REJECT:
switch (ext_status) {
case SLI4_FC_LOCAL_REJECT_SEQUENCE_TIMEOUT:
ocs_els_post_event(els, OCS_EVT_ELS_REQ_TIMEOUT, &cbdata);
break;
case SLI4_FC_LOCAL_REJECT_ABORT_REQUESTED:
ocs_els_post_event(els, OCS_EVT_ELS_REQ_ABORTED, &cbdata);
break;
default:
ocs_els_post_event(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &cbdata);
break;
}
break;
default:
ocs_log_warn(ocs, "els req complete: failed status x%x, ext_status, x%x\n", status, ext_status);
ocs_els_post_event(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &cbdata);
break;
}
return 0;
}
/**
* @ingroup els_api
* @brief Handle ELS IO accept/response completions.
*
* <h3 class="desc">Description</h3>
* This callback is used for several ELS send operations.
*
* @param hio Pointer to the HW IO context that completed.
* @param rnode Pointer to the remote node.
* @param length Length of the returned payload data.
* @param status Status of the completion.
* @param ext_status Extended status of the completion.
* @param arg Application-specific argument (generally a pointer to the ELS IO context).
*
* @return Returns 0 on success; or a negative error value on failure.
*/
static int32_t
ocs_els_acc_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *arg)
{
ocs_io_t *els;
ocs_node_t *node;
ocs_t *ocs;
ocs_node_cb_t cbdata;
ocs_io_t *io;
ocs_assert(arg, -1);
io = arg;
els = io;
ocs_assert(els, -1);
ocs_assert(els->node, -1);
node = els->node;
ocs_assert(node->ocs, -1);
ocs = node->ocs;
ocs_assert(io->hio, -1);
ocs_assert(hio == io->hio, -1);
cbdata.status = status;
cbdata.ext_status = ext_status;
cbdata.header = NULL;
cbdata.els = els;
/* Post node event */
switch (status) {
case SLI4_FC_WCQE_STATUS_SUCCESS:
ocs_node_post_event(node, OCS_EVT_SRRS_ELS_CMPL_OK, &cbdata);
break;
default:
ocs_log_warn(ocs, "[%s] %-8s failed status x%x, ext_status x%x\n",
node->display_name, els->display_name, status, ext_status);
ocs_log_warn(ocs, "els acc complete: failed status x%x, ext_status, x%x\n", status, ext_status);
ocs_node_post_event(node, OCS_EVT_SRRS_ELS_CMPL_FAIL, &cbdata);
break;
}
/* If this IO has a callback, invoke it */
if (els->els_callback) {
(*els->els_callback)(node, &cbdata, els->els_callback_arg);
}
ocs_els_io_free(els);
return 0;
}
/**
* @ingroup els_api
* @brief Format and send a PLOGI ELS command.
*
* <h3 class="desc">Description</h3>
* Construct a PLOGI payload using the domain SLI port service parameters,
* and send to the \c node.
*
* @param node Node to which the PLOGI is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_plogi(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
void (*cb)(ocs_node_t *node, ocs_node_cb_t *cbdata, void *arg), void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fc_plogi_payload_t *plogi;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*plogi), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "plogi";
/* Build PLOGI request */
plogi = els->els_req.virt;
ocs_memcpy(plogi, node->sport->service_params, sizeof(*plogi));
plogi->command_code = FC_ELS_CMD_PLOGI;
plogi->resv1 = 0;
ocs_display_sparams(node->display_name, "plogi send req", 0, NULL, plogi->common_service_parameters);
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Format and send a FLOGI ELS command.
*
* <h3 class="desc">Description</h3>
* Construct an FLOGI payload, and send to the \c node.
*
* @param node Node to which the FLOGI is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_flogi(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs;
fc_plogi_payload_t *flogi;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs_assert(node->sport, NULL);
ocs = node->ocs;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*flogi), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "flogi";
/* Build FLOGI request */
flogi = els->els_req.virt;
ocs_memcpy(flogi, node->sport->service_params, sizeof(*flogi));
flogi->command_code = FC_ELS_CMD_FLOGI;
flogi->resv1 = 0;
/* Priority tagging support */
flogi->common_service_parameters[1] |= ocs_htobe32(1U << 23);
ocs_display_sparams(node->display_name, "flogi send req", 0, NULL, flogi->common_service_parameters);
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Format and send a FDISC ELS command.
*
* <h3 class="desc">Description</h3>
* Construct an FDISC payload, and send to the \c node.
*
* @param node Node to which the FDISC is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_fdisc(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs;
fc_plogi_payload_t *fdisc;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs = node->ocs;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*fdisc), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "fdisc";
/* Build FDISC request */
fdisc = els->els_req.virt;
ocs_memcpy(fdisc, node->sport->service_params, sizeof(*fdisc));
fdisc->command_code = FC_ELS_CMD_FDISC;
fdisc->resv1 = 0;
ocs_display_sparams(node->display_name, "fdisc send req", 0, NULL, fdisc->common_service_parameters);
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a PRLI ELS command.
*
* <h3 class="desc">Description</h3>
* Construct a PRLI ELS command, and send to the \c node.
*
* @param node Node to which the PRLI is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_prli(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_t *ocs = node->ocs;
ocs_io_t *els;
fc_prli_payload_t *prli;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*prli), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "prli";
/* Build PRLI request */
prli = els->els_req.virt;
ocs_memset(prli, 0, sizeof(*prli));
prli->command_code = FC_ELS_CMD_PRLI;
prli->page_length = 16;
prli->payload_length = ocs_htobe16(sizeof(fc_prli_payload_t));
prli->type = FC_TYPE_FCP;
prli->type_ext = 0;
prli->flags = ocs_htobe16(FC_PRLI_ESTABLISH_IMAGE_PAIR);
prli->service_params = ocs_htobe16(FC_PRLI_READ_XRDY_DISABLED |
(node->sport->enable_ini ? FC_PRLI_INITIATOR_FUNCTION : 0) |
(node->sport->enable_tgt ? FC_PRLI_TARGET_FUNCTION : 0));
/* For Tape Drive support */
prli->service_params |= ocs_htobe16(FC_PRLI_CONFIRMED_COMPLETION | FC_PRLI_RETRY |
FC_PRLI_TASK_RETRY_ID_REQ| FC_PRLI_REC_SUPPORT);
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a PRLO ELS command.
*
* <h3 class="desc">Description</h3>
* Construct a PRLO ELS command, and send to the \c node.
*
* @param node Node to which the PRLO is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_prlo(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_t *ocs = node->ocs;
ocs_io_t *els;
fc_prlo_payload_t *prlo;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*prlo), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "prlo";
/* Build PRLO request */
prlo = els->els_req.virt;
ocs_memset(prlo, 0, sizeof(*prlo));
prlo->command_code = FC_ELS_CMD_PRLO;
prlo->page_length = 16;
prlo->payload_length = ocs_htobe16(sizeof(fc_prlo_payload_t));
prlo->type = FC_TYPE_FCP;
prlo->type_ext = 0;
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a LOGO ELS command.
*
* <h3 class="desc">Description</h3>
* Format a LOGO, and send to the \c node.
*
* @param node Node to which the LOGO is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_logo(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs;
fc_logo_payload_t *logo;
fc_plogi_payload_t *sparams;
ocs = node->ocs;
node_els_trace();
sparams = (fc_plogi_payload_t*) node->sport->service_params;
els = ocs_els_io_alloc(node, sizeof(*logo), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "logo";
/* Build LOGO request */
logo = els->els_req.virt;
ocs_memset(logo, 0, sizeof(*logo));
logo->command_code = FC_ELS_CMD_LOGO;
logo->resv1 = 0;
logo->port_id = fc_htobe24(node->rnode.sport->fc_id);
logo->port_name_hi = sparams->port_name_hi;
logo->port_name_lo = sparams->port_name_lo;
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send an ADISC ELS command.
*
* <h3 class="desc">Description</h3>
* Construct an ADISC ELS command, and send to the \c node.
*
* @param node Node to which the ADISC is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_adisc(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs;
fc_adisc_payload_t *adisc;
fc_plogi_payload_t *sparams;
ocs_sport_t *sport = node->sport;
ocs = node->ocs;
node_els_trace();
sparams = (fc_plogi_payload_t*) node->sport->service_params;
els = ocs_els_io_alloc(node, sizeof(*adisc), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "adisc";
/* Build ADISC request */
adisc = els->els_req.virt;
sparams = (fc_plogi_payload_t*) node->sport->service_params;
ocs_memset(adisc, 0, sizeof(*adisc));
adisc->command_code = FC_ELS_CMD_ADISC;
adisc->hard_address = fc_htobe24(sport->fc_id);
adisc->port_name_hi = sparams->port_name_hi;
adisc->port_name_lo = sparams->port_name_lo;
adisc->node_name_hi = sparams->node_name_hi;
adisc->node_name_lo = sparams->node_name_lo;
adisc->port_id = fc_htobe24(node->rnode.sport->fc_id);
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a PDISC ELS command.
*
* <h3 class="desc">Description</h3>
* Construct a PDISC ELS command, and send to the \c node.
*
* @param node Node to which the PDISC is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_pdisc(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fc_plogi_payload_t *pdisc;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*pdisc), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "pdisc";
pdisc = els->els_req.virt;
ocs_memcpy(pdisc, node->sport->service_params, sizeof(*pdisc));
pdisc->command_code = FC_ELS_CMD_PDISC;
pdisc->resv1 = 0;
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send an SCR ELS command.
*
* <h3 class="desc">Description</h3>
* Format an SCR, and send to the \c node.
*
* @param node Node to which the SCR is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function
* @param cbarg Callback function arg
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_scr(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fc_scr_payload_t *req;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*req), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "scr";
req = els->els_req.virt;
ocs_memset(req, 0, sizeof(*req));
req->command_code = FC_ELS_CMD_SCR;
req->function = FC_SCR_REG_FULL;
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send an RRQ ELS command.
*
* <h3 class="desc">Description</h3>
* Format an RRQ, and send to the \c node.
*
* @param node Node to which the RRQ is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function
* @param cbarg Callback function arg
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_rrq(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fc_scr_payload_t *req;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*req), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "scr";
req = els->els_req.virt;
ocs_memset(req, 0, sizeof(*req));
req->command_code = FC_ELS_CMD_RRQ;
req->function = FC_SCR_REG_FULL;
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send an RSCN ELS command.
*
* <h3 class="desc">Description</h3>
* Format an RSCN, and send to the \c node.
*
* @param node Node to which the RRQ is sent.
* @param timeout_sec Command timeout, in seconds.
* @param retries Number of times to retry errors before reporting a failure.
* @param port_ids Pointer to port IDs
* @param port_ids_count Count of port IDs
* @param cb Callback function
* @param cbarg Callback function arg
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_rscn(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
void *port_ids, uint32_t port_ids_count, els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fc_rscn_payload_t *req;
uint32_t payload_length = sizeof(fc_rscn_affected_port_id_page_t)*(port_ids_count - 1) +
sizeof(fc_rscn_payload_t);
node_els_trace();
els = ocs_els_io_alloc(node, payload_length, OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->els_timeout_sec = timeout_sec;
els->els_retries_remaining = retries;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "rscn";
req = els->els_req.virt;
req->command_code = FC_ELS_CMD_RSCN;
req->page_length = sizeof(fc_rscn_affected_port_id_page_t);
req->payload_length = ocs_htobe16(sizeof(*req) +
sizeof(fc_rscn_affected_port_id_page_t)*(port_ids_count-1));
els->hio_type = OCS_HW_ELS_REQ;
els->iparam.els.timeout = timeout_sec;
/* copy in the payload */
ocs_memcpy(req->port_list, port_ids, port_ids_count*sizeof(fc_rscn_affected_port_id_page_t));
/* Submit the request */
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @brief Send an LS_RJT ELS response.
*
* <h3 class="desc">Description</h3>
* Send an LS_RJT ELS response.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID being responded to.
* @param reason_code Reason code value for LS_RJT.
* @param reason_code_expl Reason code explanation value for LS_RJT.
* @param vendor_unique Vendor-unique value for LS_RJT.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_ls_rjt(ocs_io_t *io, uint32_t ox_id, uint32_t reason_code, uint32_t reason_code_expl,
uint32_t vendor_unique, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_ls_rjt_payload_t *rjt;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "ls_rjt";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
rjt = io->els_req.virt;
ocs_memset(rjt, 0, sizeof(*rjt));
rjt->command_code = FC_ELS_CMD_RJT;
rjt->reason_code = reason_code;
rjt->reason_code_exp = reason_code_expl;
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*rjt)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a PLOGI accept response.
*
* <h3 class="desc">Description</h3>
* Construct a PLOGI LS_ACC, and send to the \c node, using the originator exchange ID
* \c ox_id.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID being responsed to.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_plogi_acc(ocs_io_t *io, uint32_t ox_id, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_plogi_payload_t *plogi;
fc_plogi_payload_t *req = (fc_plogi_payload_t *)node->service_params;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "plog_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
plogi = io->els_req.virt;
/* copy our port's service parameters to payload */
ocs_memcpy(plogi, node->sport->service_params, sizeof(*plogi));
plogi->command_code = FC_ELS_CMD_ACC;
plogi->resv1 = 0;
/* Set Application header support bit if requested */
if (req->common_service_parameters[1] & ocs_htobe32(1U << 24)) {
plogi->common_service_parameters[1] |= ocs_htobe32(1U << 24);
}
/* Priority tagging support. */
if (req->common_service_parameters[1] & ocs_htobe32(1U << 23)) {
plogi->common_service_parameters[1] |= ocs_htobe32(1U << 23);
}
ocs_display_sparams(node->display_name, "plogi send resp", 0, NULL, plogi->common_service_parameters);
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*plogi)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send an FLOGI accept response for point-to-point negotiation.
*
* <h3 class="desc">Description</h3>
* Construct an FLOGI accept response, and send to the \c node using the originator
* exchange id \c ox_id. The \c s_id is used for the response frame source FC ID.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID for the response.
* @param s_id Source FC ID to be used in the response frame.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_flogi_p2p_acc(ocs_io_t *io, uint32_t ox_id, uint32_t s_id, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_plogi_payload_t *flogi;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "flogi_p2p_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els_sid.ox_id = ox_id;
io->iparam.els_sid.s_id = s_id;
flogi = io->els_req.virt;
/* copy our port's service parameters to payload */
ocs_memcpy(flogi, node->sport->service_params, sizeof(*flogi));
flogi->command_code = FC_ELS_CMD_ACC;
flogi->resv1 = 0;
ocs_memset(flogi->class1_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class2_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class3_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class4_service_parameters, 0, sizeof(flogi->class1_service_parameters));
io->hio_type = OCS_HW_ELS_RSP_SID;
if ((rc = ocs_els_send_rsp(io, sizeof(*flogi)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
ocs_io_t *
ocs_send_flogi_acc(ocs_io_t *io, uint32_t ox_id, uint32_t is_fport, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_plogi_payload_t *flogi;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "flogi_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els_sid.ox_id = ox_id;
io->iparam.els_sid.s_id = io->node->sport->fc_id;
flogi = io->els_req.virt;
/* copy our port's service parameters to payload */
ocs_memcpy(flogi, node->sport->service_params, sizeof(*flogi));
/* Set F_port */
if (is_fport) {
/* Set F_PORT and Multiple N_PORT_ID Assignment */
flogi->common_service_parameters[1] |= ocs_be32toh(3U << 28);
}
flogi->command_code = FC_ELS_CMD_ACC;
flogi->resv1 = 0;
ocs_display_sparams(node->display_name, "flogi send resp", 0, NULL, flogi->common_service_parameters);
ocs_memset(flogi->class1_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class2_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class3_service_parameters, 0, sizeof(flogi->class1_service_parameters));
ocs_memset(flogi->class4_service_parameters, 0, sizeof(flogi->class1_service_parameters));
io->hio_type = OCS_HW_ELS_RSP_SID;
if ((rc = ocs_els_send_rsp(io, sizeof(*flogi)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a PRLI accept response
*
* <h3 class="desc">Description</h3>
* Construct a PRLI LS_ACC response, and send to the \c node, using the originator
* \c ox_id exchange ID.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_prli_acc(ocs_io_t *io, uint32_t ox_id, uint8_t fc_type, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_prli_payload_t *prli;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "prli_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
prli = io->els_req.virt;
ocs_memset(prli, 0, sizeof(*prli));
prli->command_code = FC_ELS_CMD_ACC;
prli->page_length = 16;
prli->payload_length = ocs_htobe16(sizeof(fc_prli_payload_t));
prli->type = fc_type;
prli->type_ext = 0;
prli->flags = ocs_htobe16(FC_PRLI_ESTABLISH_IMAGE_PAIR | FC_PRLI_REQUEST_EXECUTED);
prli->service_params = ocs_htobe16(FC_PRLI_READ_XRDY_DISABLED |
(node->sport->enable_ini ? FC_PRLI_INITIATOR_FUNCTION : 0) |
(node->sport->enable_tgt ? FC_PRLI_TARGET_FUNCTION : 0));
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*prli)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a PRLO accept response.
*
* <h3 class="desc">Description</h3>
* Construct a PRLO LS_ACC response, and send to the \c node, using the originator
* exchange ID \c ox_id.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_prlo_acc(ocs_io_t *io, uint32_t ox_id, uint8_t fc_type, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_prlo_acc_payload_t *prlo_acc;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "prlo_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
prlo_acc = io->els_req.virt;
ocs_memset(prlo_acc, 0, sizeof(*prlo_acc));
prlo_acc->command_code = FC_ELS_CMD_ACC;
prlo_acc->page_length = 16;
prlo_acc->payload_length = ocs_htobe16(sizeof(fc_prlo_acc_payload_t));
prlo_acc->type = fc_type;
prlo_acc->type_ext = 0;
prlo_acc->response_code = FC_PRLO_REQUEST_EXECUTED;
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*prlo_acc)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a generic LS_ACC response without a payload.
*
* <h3 class="desc">Description</h3>
* A generic LS_ACC response is sent to the \c node using the originator exchange ID
* \c ox_id.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange id.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_ls_acc(ocs_io_t *io, uint32_t ox_id, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_acc_payload_t *acc;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "ls_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
acc = io->els_req.virt;
ocs_memset(acc, 0, sizeof(*acc));
acc->command_code = FC_ELS_CMD_ACC;
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*acc)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a LOGO accept response.
*
* <h3 class="desc">Description</h3>
* Construct a LOGO LS_ACC response, and send to the \c node, using the originator
* exchange ID \c ox_id.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_logo_acc(ocs_io_t *io, uint32_t ox_id, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
ocs_t *ocs = node->ocs;
fc_acc_payload_t *logo;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "logo_acc";
io->init_task_tag = ox_id;
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
logo = io->els_req.virt;
ocs_memset(logo, 0, sizeof(*logo));
logo->command_code = FC_ELS_CMD_ACC;
logo->resv1 = 0;
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*logo)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send an ADISC accept response.
*
* <h3 class="desc">Description</h3>
* Construct an ADISC LS__ACC, and send to the \c node, using the originator
* exchange id \c ox_id.
*
* @param io Pointer to a SCSI IO object.
* @param ox_id Originator exchange ID.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_send_adisc_acc(ocs_io_t *io, uint32_t ox_id, els_cb_t cb, void *cbarg)
{
ocs_node_t *node = io->node;
int32_t rc;
fc_adisc_payload_t *adisc;
fc_plogi_payload_t *sparams;
ocs_t *ocs;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs = node->ocs;
node_els_trace();
io->els_callback = cb;
io->els_callback_arg = cbarg;
io->display_name = "adisc_acc";
io->init_task_tag = ox_id;
/* Go ahead and send the ELS_ACC */
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.els.ox_id = ox_id;
sparams = (fc_plogi_payload_t*) node->sport->service_params;
adisc = io->els_req.virt;
ocs_memset(adisc, 0, sizeof(fc_adisc_payload_t));
adisc->command_code = FC_ELS_CMD_ACC;
adisc->hard_address = 0;
adisc->port_name_hi = sparams->port_name_hi;
adisc->port_name_lo = sparams->port_name_lo;
adisc->node_name_hi = sparams->node_name_hi;
adisc->node_name_lo = sparams->node_name_lo;
adisc->port_id = fc_htobe24(node->rnode.sport->fc_id);
io->hio_type = OCS_HW_ELS_RSP;
if ((rc = ocs_els_send_rsp(io, sizeof(*adisc)))) {
ocs_els_io_free(io);
io = NULL;
}
return io;
}
/**
* @ingroup els_api
* @brief Send a RFTID CT request.
*
* <h3 class="desc">Description</h3>
* Construct an RFTID CT request, and send to the \c node.
*
* @param node Node to which the RFTID request is sent.
* @param timeout_sec Time, in seconds, to wait before timing out the ELS.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_ns_send_rftid(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fcct_rftid_req_t *rftid;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*rftid), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->iparam.fc_ct.r_ctl = FC_RCTL_ELS;
els->iparam.fc_ct.type = FC_TYPE_GS;
els->iparam.fc_ct.df_ctl = 0;
els->iparam.fc_ct.timeout = timeout_sec;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "rftid";
rftid = els->els_req.virt;
ocs_memset(rftid, 0, sizeof(*rftid));
fcct_build_req_header(&rftid->hdr, FC_GS_NAMESERVER_RFT_ID, (OCS_ELS_RSP_LEN - sizeof(rftid->hdr)));
rftid->port_id = ocs_htobe32(node->rnode.sport->fc_id);
rftid->fc4_types[FC_GS_TYPE_WORD(FC_TYPE_FCP)] = ocs_htobe32(1 << FC_GS_TYPE_BIT(FC_TYPE_FCP));
els->hio_type = OCS_HW_FC_CT;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a RFFID CT request.
*
* <h3 class="desc">Description</h3>
* Construct an RFFID CT request, and send to the \c node.
*
* @param node Node to which the RFFID request is sent.
* @param timeout_sec Time, in seconds, to wait before timing out the ELS.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_ns_send_rffid(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fcct_rffid_req_t *rffid;
node_els_trace();
els = ocs_els_io_alloc(node, sizeof(*rffid), OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->iparam.fc_ct.r_ctl = FC_RCTL_ELS;
els->iparam.fc_ct.type = FC_TYPE_GS;
els->iparam.fc_ct.df_ctl = 0;
els->iparam.fc_ct.timeout = timeout_sec;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "rffid";
rffid = els->els_req.virt;
ocs_memset(rffid, 0, sizeof(*rffid));
fcct_build_req_header(&rffid->hdr, FC_GS_NAMESERVER_RFF_ID, (OCS_ELS_RSP_LEN - sizeof(rffid->hdr)));
rffid->port_id = ocs_htobe32(node->rnode.sport->fc_id);
if (node->sport->enable_ini) {
rffid->fc4_feature_bits |= FC4_FEATURE_INITIATOR;
}
if (node->sport->enable_tgt) {
rffid->fc4_feature_bits |= FC4_FEATURE_TARGET;
}
rffid->type = FC_TYPE_FCP;
els->hio_type = OCS_HW_FC_CT;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a GIDPT CT request.
*
* <h3 class="desc">Description</h3>
* Construct a GIDPT CT request, and send to the \c node.
*
* @param node Node to which the GIDPT request is sent.
* @param timeout_sec Time, in seconds, to wait before timing out the ELS.
* @param retries Number of times to retry errors before reporting a failure.
* @param cb Callback function.
* @param cbarg Callback function argument.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_ns_send_gidpt(ocs_node_t *node, uint32_t timeout_sec, uint32_t retries,
els_cb_t cb, void *cbarg)
{
ocs_io_t *els;
ocs_t *ocs = node->ocs;
fcct_gidpt_req_t *gidpt;
node_els_trace();
els = ocs_els_io_alloc_size(node, sizeof(*gidpt), OCS_ELS_GID_PT_RSP_LEN, OCS_ELS_ROLE_ORIGINATOR);
if (els == NULL) {
ocs_log_err(ocs, "IO alloc failed\n");
} else {
els->iparam.fc_ct.r_ctl = FC_RCTL_ELS;
els->iparam.fc_ct.type = FC_TYPE_GS;
els->iparam.fc_ct.df_ctl = 0;
els->iparam.fc_ct.timeout = timeout_sec;
els->els_callback = cb;
els->els_callback_arg = cbarg;
els->display_name = "gidpt";
gidpt = els->els_req.virt;
ocs_memset(gidpt, 0, sizeof(*gidpt));
fcct_build_req_header(&gidpt->hdr, FC_GS_NAMESERVER_GID_PT, (OCS_ELS_GID_PT_RSP_LEN - sizeof(gidpt->hdr)) );
gidpt->domain_id_scope = 0;
gidpt->area_id_scope = 0;
gidpt->port_type = 0x7f;
els->hio_type = OCS_HW_FC_CT;
ocs_io_transition(els, __ocs_els_init, NULL);
}
return els;
}
/**
* @ingroup els_api
* @brief Send a BA_ACC given the request's FC header
*
* <h3 class="desc">Description</h3>
* Using the S_ID/D_ID from the request's FC header, generate a BA_ACC.
*
* @param io Pointer to a SCSI IO object.
* @param hdr Pointer to the FC header.
*
* @return Returns pointer to IO object, or NULL if error.
*/
ocs_io_t *
ocs_bls_send_acc_hdr(ocs_io_t *io, fc_header_t *hdr)
{
uint16_t ox_id = ocs_be16toh(hdr->ox_id);
uint16_t rx_id = ocs_be16toh(hdr->rx_id);
uint32_t d_id = fc_be24toh(hdr->d_id);
return ocs_bls_send_acc(io, d_id, ox_id, rx_id);
}
/**
* @ingroup els_api
* @brief Send a BLS BA_ACC response.
*
* <h3 class="desc">Description</h3>
* Construct a BLS BA_ACC response, and send to the \c node.
*
* @param io Pointer to a SCSI IO object.
* @param s_id S_ID to use for the response. If UINT32_MAX, then use our SLI port
* (sport) S_ID.
* @param ox_id Originator exchange ID.
* @param rx_id Responder exchange ID.
*
* @return Returns pointer to IO object, or NULL if error.
*/
static ocs_io_t *
ocs_bls_send_acc(ocs_io_t *io, uint32_t s_id, uint16_t ox_id, uint16_t rx_id)
{
ocs_node_t *node = io->node;
int32_t rc;
fc_ba_acc_payload_t *acc;
ocs_t *ocs;
ocs_assert(node, NULL);
ocs_assert(node->ocs, NULL);
ocs = node->ocs;
if (node->rnode.sport->fc_id == s_id) {
s_id = UINT32_MAX;
}
/* fill out generic fields */
io->ocs = ocs;
io->node = node;
io->cmd_tgt = TRUE;
/* fill out BLS Response-specific fields */
io->io_type = OCS_IO_TYPE_BLS_RESP;
io->display_name = "ba_acc";
io->hio_type = OCS_HW_BLS_ACC_SID;
io->init_task_tag = ox_id;
/* fill out iparam fields */
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->iparam.bls_sid.s_id = s_id;
io->iparam.bls_sid.ox_id = ox_id;
io->iparam.bls_sid.rx_id = rx_id;
acc = (void *)io->iparam.bls_sid.payload;
ocs_memset(io->iparam.bls_sid.payload, 0, sizeof(io->iparam.bls_sid.payload));
acc->ox_id = io->iparam.bls_sid.ox_id;
acc->rx_id = io->iparam.bls_sid.rx_id;
acc->high_seq_cnt = UINT16_MAX;
if ((rc = ocs_scsi_io_dispatch(io, ocs_bls_send_acc_cb))) {
ocs_log_err(ocs, "ocs_scsi_io_dispatch() failed: %d\n", rc);
ocs_scsi_io_free(io);
io = NULL;
}
return io;
}
/**
* @brief Handle the BLS accept completion.
*
* <h3 class="desc">Description</h3>
* Upon completion of sending a BA_ACC, this callback is invoked by the HW.
*
* @param hio Pointer to the HW IO object.
* @param rnode Pointer to the HW remote node.
* @param length Length of the response payload, in bytes.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Callback private argument.
*
* @return Returns 0 on success; or a negative error value on failure.
*/
static int32_t
ocs_bls_send_acc_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *io = app;
ocs_assert(io, -1);
ocs_scsi_io_free(io);
return 0;
}
/**
* @brief ELS abort callback.
*
* <h3 class="desc">Description</h3>
* This callback is invoked by the HW when an ELS IO is aborted.
*
* @param hio Pointer to the HW IO object.
* @param rnode Pointer to the HW remote node.
* @param length Length of the response payload, in bytes.
* @param status Completion status.
* @param ext_status Extended completion status.
* @param app Callback private argument.
*
* @return Returns 0 on success; or a negative error value on failure.
*/
static int32_t
ocs_els_abort_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *app)
{
ocs_io_t *els;
ocs_io_t *abort_io = NULL; /* IO structure used to abort ELS */
ocs_t *ocs;
ocs_assert(app, -1);
abort_io = app;
els = abort_io->io_to_abort;
ocs_assert(els->node, -1);
ocs_assert(els->node->ocs, -1);
ocs = els->node->ocs;
if (status != 0) {
ocs_log_warn(ocs, "status x%x ext x%x\n", status, ext_status);
}
/* now free the abort IO */
ocs_io_free(ocs, abort_io);
/* send completion event to indicate abort process is complete
* Note: The ELS SM will already be receiving ELS_REQ_OK/FAIL/RJT/ABORTED
*/
ocs_els_post_event(els, OCS_EVT_ELS_ABORT_CMPL, NULL);
/* done with ELS IO to abort */
ocs_ref_put(&els->ref); /* ocs_ref_get(): ocs_els_abort_io() */
return 0;
}
/**
* @brief Abort an ELS IO.
*
* <h3 class="desc">Description</h3>
* The ELS IO is aborted by making a HW abort IO request,
* optionally requesting that an ABTS is sent.
*
* \b Note: This function allocates a HW IO, and associates the HW IO
* with the ELS IO that it is aborting. It does not associate
* the HW IO with the node directly, like for ELS requests. The
* abort completion is propagated up to the node once the
* original WQE and the abort WQE are complete (the original WQE
* completion is not propagated up to node).
*
* @param els Pointer to the ELS IO.
* @param send_abts Boolean to indicate if hardware will automatically generate an ABTS.
*
* @return Returns pointer to Abort IO object, or NULL if error.
*/
static ocs_io_t *
ocs_els_abort_io(ocs_io_t *els, int send_abts)
{
ocs_t *ocs;
ocs_xport_t *xport;
int32_t rc;
ocs_io_t *abort_io = NULL;
ocs_assert(els, NULL);
ocs_assert(els->node, NULL);
ocs_assert(els->node->ocs, NULL);
ocs = els->node->ocs;
ocs_assert(ocs->xport, NULL);
xport = ocs->xport;
/* take a reference on IO being aborted */
if ((ocs_ref_get_unless_zero(&els->ref) == 0)) {
/* command no longer active */
ocs_log_debug(ocs, "els no longer active\n");
return NULL;
}
/* allocate IO structure to send abort */
abort_io = ocs_io_alloc(ocs);
if (abort_io == NULL) {
ocs_atomic_add_return(&xport->io_alloc_failed_count, 1);
} else {
ocs_assert(abort_io->hio == NULL, NULL);
/* set generic fields */
abort_io->ocs = ocs;
abort_io->node = els->node;
abort_io->cmd_ini = TRUE;
/* set type and ABORT-specific fields */
abort_io->io_type = OCS_IO_TYPE_ABORT;
abort_io->display_name = "abort_els";
abort_io->io_to_abort = els;
abort_io->send_abts = send_abts;
/* now dispatch IO */
if ((rc = ocs_scsi_io_dispatch_abort(abort_io, ocs_els_abort_cb))) {
ocs_log_err(ocs, "ocs_scsi_io_dispatch failed: %d\n", rc);
ocs_io_free(ocs, abort_io);
abort_io = NULL;
}
}
/* if something failed, put reference on ELS to abort */
if (abort_io == NULL) {
ocs_ref_put(&els->ref); /* ocs_ref_get(): same function */
}
return abort_io;
}
/*
* ELS IO State Machine
*/
#define std_els_state_decl(...) \
ocs_io_t *els = NULL; \
ocs_node_t *node = NULL; \
ocs_t *ocs = NULL; \
ocs_assert(ctx != NULL, NULL); \
els = ctx->app; \
ocs_assert(els != NULL, NULL); \
node = els->node; \
ocs_assert(node != NULL, NULL); \
ocs = node->ocs; \
ocs_assert(ocs != NULL, NULL);
#define els_sm_trace(...) \
do { \
if (OCS_LOG_ENABLE_ELS_TRACE(ocs)) \
ocs_log_info(ocs, "[%s] %-8s %-20s %-20s\n", node->display_name, els->display_name, \
__func__, ocs_sm_event_name(evt)); \
} while (0)
/**
* @brief Cleanup an ELS IO
*
* <h3 class="desc">Description</h3>
* Cleans up an ELS IO by posting the requested event to the owning node object;
* invoking the callback, if one is provided; and then freeing the
* ELS IO object.
*
* @param els Pointer to the ELS IO.
* @param node_evt Node SM event to post.
* @param arg Node SM event argument.
*
* @return None.
*/
void
ocs_els_io_cleanup(ocs_io_t *els, ocs_sm_event_t node_evt, void *arg)
{
ocs_assert(els);
/* don't want further events that could come; e.g. abort requests
* from the node state machine; thus, disable state machine
*/
ocs_sm_disable(&els->els_sm);
ocs_node_post_event(els->node, node_evt, arg);
/* If this IO has a callback, invoke it */
if (els->els_callback) {
(*els->els_callback)(els->node, arg, els->els_callback_arg);
}
els->els_req_free = 1;
}
/**
* @brief Common event handler for the ELS IO state machine.
*
* <h3 class="desc">Description</h3>
* Provide handler for events for which default actions are desired.
*
* @param funcname Name of the calling function (for logging).
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_common(const char *funcname, ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
switch(evt) {
case OCS_EVT_ENTER:
case OCS_EVT_REENTER:
case OCS_EVT_EXIT:
break;
/* If ELS_REQ_FAIL is not handled in state, then we'll terminate this ELS and
* pass the event to the node
*/
case OCS_EVT_SRRS_ELS_REQ_FAIL:
ocs_log_warn(els->node->ocs, "[%s] %-20s %-20s not handled - terminating ELS\n", node->display_name, funcname,
ocs_sm_event_name(evt));
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, arg);
break;
default:
ocs_log_warn(els->node->ocs, "[%s] %-20s %-20s not handled\n", node->display_name, funcname,
ocs_sm_event_name(evt));
break;
}
return NULL;
}
/**
* @brief Initial ELS IO state
*
* <h3 class="desc">Description</h3>
* This is the initial ELS IO state. Upon entry, the requested ELS/CT is submitted to
* the hardware.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_init(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
int32_t rc = 0;
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_ENTER: {
rc = ocs_els_send(els, els->els_req.size, els->els_timeout_sec, ocs_els_req_cb);
if (rc) {
ocs_node_cb_t cbdata;
cbdata.status = cbdata.ext_status = (~0);
cbdata.els = els;
ocs_log_err(ocs, "ocs_els_send failed: %d\n", rc);
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &cbdata);
} else {
ocs_io_transition(els, __ocs_els_wait_resp, NULL);
}
break;
}
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for the ELS request to complete.
*
* <h3 class="desc">Description</h3>
* This is the ELS IO state that waits for the submitted ELS event to complete.
* If an error completion event is received, the requested ELS is aborted.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_wait_resp(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
ocs_io_t *io;
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK: {
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_OK, arg);
break;
}
case OCS_EVT_SRRS_ELS_REQ_FAIL: {
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, arg);
break;
}
case OCS_EVT_ELS_REQ_TIMEOUT: {
els_io_printf(els, "Timed out, retry (%d tries remaining)\n",
els->els_retries_remaining-1);
ocs_io_transition(els, __ocs_els_retry, NULL);
break;
}
case OCS_EVT_SRRS_ELS_REQ_RJT: {
ocs_node_cb_t *cbdata = arg;
uint32_t reason_code = (cbdata->ext_status >> 16) & 0xff;
/* delay and retry if reason code is Logical Busy */
switch (reason_code) {
case FC_REASON_LOGICAL_BUSY:
els->node->els_req_cnt--;
els_io_printf(els, "LS_RJT Logical Busy response, delay and retry\n");
ocs_io_transition(els, __ocs_els_delay_retry, NULL);
break;
default:
ocs_els_io_cleanup(els, evt, arg);
break;
}
break;
}
case OCS_EVT_ABORT_ELS: {
/* request to abort this ELS without an ABTS */
els_io_printf(els, "ELS abort requested\n");
els->els_retries_remaining = 0; /* Set retries to zero, we are done */
io = ocs_els_abort_io(els, FALSE);
if (io == NULL) {
ocs_log_err(ocs, "ocs_els_send failed\n");
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, arg);
} else {
ocs_io_transition(els, __ocs_els_aborting, NULL);
}
break;
}
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for the ELS IO abort request to complete, and retry the ELS.
*
* <h3 class="desc">Description</h3>
* This state is entered when waiting for an abort of an ELS
* request to complete so the request can be retried.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_retry(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
int32_t rc = 0;
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_ENTER: {
/* handle event for ABORT_XRI WQE
* once abort is complete, retry if retries left;
* don't need to wait for OCS_EVT_SRRS_ELS_REQ_* event because we got
* by receiving OCS_EVT_ELS_REQ_TIMEOUT
*/
ocs_node_cb_t node_cbdata;
node_cbdata.status = node_cbdata.ext_status = (~0);
node_cbdata.els = els;
if (els->els_retries_remaining && --els->els_retries_remaining) {
/* Use a different XRI for the retry (would like a new oxid),
* so free the HW IO (dispatch will allocate a new one). It's an
* optimization to only free the HW IO here and not the ocs_io_t;
* Freeing the ocs_io_t object would require copying all the necessary
* info from the old ocs_io_t object to the * new one; and allocating
* a new ocs_io_t could fail.
*/
ocs_assert(els->hio, NULL);
ocs_hw_io_free(&ocs->hw, els->hio);
els->hio = NULL;
/* result isn't propagated up to node sm, need to decrement req cnt */
ocs_assert(els->node->els_req_cnt, NULL);
els->node->els_req_cnt--;
rc = ocs_els_send(els, els->els_req.size, els->els_timeout_sec, ocs_els_req_cb);
if (rc) {
ocs_log_err(ocs, "ocs_els_send failed: %d\n", rc);
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &node_cbdata);
}
ocs_io_transition(els, __ocs_els_wait_resp, NULL);
} else {
els_io_printf(els, "Retries exhausted\n");
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, &node_cbdata);
}
break;
}
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for a retry timer to expire having received an abort request
*
* <h3 class="desc">Description</h3>
* This state is entered when waiting for a timer event, after having received
* an abort request, to avoid a race condition with the timer handler
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_aborted_delay_retry(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
/* mod/resched the timer for a short duration */
ocs_mod_timer(&els->delay_timer, 1);
break;
case OCS_EVT_TIMER_EXPIRED:
/* Cancel the timer, skip post node event, and free the io */
node->els_req_cnt++;
ocs_els_io_cleanup(els, OCS_EVT_SRRS_ELS_REQ_FAIL, arg);
break;
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for a retry timer to expire
*
* <h3 class="desc">Description</h3>
* This state is entered when waiting for a timer event, so that
* the ELS request can be retried.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_delay_retry(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_ENTER:
ocs_setup_timer(ocs, &els->delay_timer, ocs_els_delay_timer_cb, els, 5000);
break;
case OCS_EVT_TIMER_EXPIRED:
/* Retry delay timer expired, retry the ELS request, Free the HW IO so
* that a new oxid is used.
*/
if (els->hio != NULL) {
ocs_hw_io_free(&ocs->hw, els->hio);
els->hio = NULL;
}
ocs_io_transition(els, __ocs_els_init, NULL);
break;
case OCS_EVT_ABORT_ELS:
ocs_io_transition(els, __ocs_els_aborted_delay_retry, NULL);
break;
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for the ELS IO abort request to complete.
*
* <h3 class="desc">Description</h3>
* This state is entered after we abort an ELS WQE and are
* waiting for either the original ELS WQE request or the abort
* to complete.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_aborting(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK:
case OCS_EVT_SRRS_ELS_REQ_FAIL:
case OCS_EVT_SRRS_ELS_REQ_RJT:
case OCS_EVT_ELS_REQ_TIMEOUT:
case OCS_EVT_ELS_REQ_ABORTED: {
/* completion for ELS received first, transition to wait for abort cmpl */
els_io_printf(els, "request cmpl evt=%s\n", ocs_sm_event_name(evt));
ocs_io_transition(els, __ocs_els_aborting_wait_abort_cmpl, NULL);
break;
}
case OCS_EVT_ELS_ABORT_CMPL: {
/* completion for abort was received first, transition to wait for req cmpl */
els_io_printf(els, "abort cmpl evt=%s\n", ocs_sm_event_name(evt));
ocs_io_transition(els, __ocs_els_aborting_wait_req_cmpl, NULL);
break;
}
case OCS_EVT_ABORT_ELS:
/* nothing we can do but wait */
break;
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief cleanup ELS after abort
*
* @param els ELS IO to cleanup
*
* @return Returns None.
*/
static void
ocs_els_abort_cleanup(ocs_io_t *els)
{
/* handle event for ABORT_WQE
* whatever state ELS happened to be in, propagate aborted event up
* to node state machine in lieu of OCS_EVT_SRRS_ELS_* event
*/
ocs_node_cb_t cbdata;
cbdata.status = cbdata.ext_status = 0;
cbdata.els = els;
els_io_printf(els, "Request aborted\n");
ocs_els_io_cleanup(els, OCS_EVT_ELS_REQ_ABORTED, &cbdata);
}
/**
* @brief Wait for the ELS IO abort request to complete.
*
* <h3 class="desc">Description</h3>
* This state is entered after we abort an ELS WQE, we received
* the abort completion first and are waiting for the original
* ELS WQE request to complete.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_aborting_wait_req_cmpl(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_SRRS_ELS_REQ_OK:
case OCS_EVT_SRRS_ELS_REQ_FAIL:
case OCS_EVT_SRRS_ELS_REQ_RJT:
case OCS_EVT_ELS_REQ_TIMEOUT:
case OCS_EVT_ELS_REQ_ABORTED: {
/* completion for ELS that was aborted */
ocs_els_abort_cleanup(els);
break;
}
case OCS_EVT_ABORT_ELS:
/* nothing we can do but wait */
break;
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Wait for the ELS IO abort request to complete.
*
* <h3 class="desc">Description</h3>
* This state is entered after we abort an ELS WQE, we received
* the original ELS WQE request completion first and are waiting
* for the abort to complete.
*
* @param ctx Remote node SM context.
* @param evt Event to process.
* @param arg Per event optional argument.
*
* @return Returns NULL.
*/
void *
__ocs_els_aborting_wait_abort_cmpl(ocs_sm_ctx_t *ctx, ocs_sm_event_t evt, void *arg)
{
std_els_state_decl();
els_sm_trace();
switch(evt) {
case OCS_EVT_ELS_ABORT_CMPL: {
ocs_els_abort_cleanup(els);
break;
}
case OCS_EVT_ABORT_ELS:
/* nothing we can do but wait */
break;
default:
__ocs_els_common(__func__, ctx, evt, arg);
break;
}
return NULL;
}
/**
* @brief Generate ELS context ddump data.
*
* <h3 class="desc">Description</h3>
* Generate the ddump data for an ELS context.
*
* @param textbuf Pointer to the text buffer.
* @param els Pointer to the ELS context.
*
* @return None.
*/
void
ocs_ddump_els(ocs_textbuf_t *textbuf, ocs_io_t *els)
{
ocs_ddump_section(textbuf, "els", -1);
ocs_ddump_value(textbuf, "req_free", "%d", els->els_req_free);
ocs_ddump_value(textbuf, "evtdepth", "%d", els->els_evtdepth);
ocs_ddump_value(textbuf, "pend", "%d", els->els_pend);
ocs_ddump_value(textbuf, "active", "%d", els->els_active);
ocs_ddump_io(textbuf, els);
ocs_ddump_endsection(textbuf, "els", -1);
}
/**
* @brief return TRUE if given ELS list is empty (while taking proper locks)
*
* Test if given ELS list is empty while holding the node->active_ios_lock.
*
* @param node pointer to node object
* @param list pointer to list
*
* @return TRUE if els_io_list is empty
*/
int32_t
ocs_els_io_list_empty(ocs_node_t *node, ocs_list_t *list)
{
int empty;
ocs_lock(&node->active_ios_lock);
empty = ocs_list_empty(list);
ocs_unlock(&node->active_ios_lock);
return empty;
}
/**
* @brief Handle CT send response completion
*
* Called when CT response completes, free IO
*
* @param hio Pointer to the HW IO context that completed.
* @param rnode Pointer to the remote node.
* @param length Length of the returned payload data.
* @param status Status of the completion.
* @param ext_status Extended status of the completion.
* @param arg Application-specific argument (generally a pointer to the ELS IO context).
*
* @return returns 0
*/
static int32_t
ocs_ct_acc_cb(ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t length, int32_t status, uint32_t ext_status, void *arg)
{
ocs_io_t *io = arg;
ocs_els_io_free(io);
return 0;
}
/**
* @brief Send CT response
*
* Sends a CT response frame with payload
*
* @param io Pointer to the IO context.
* @param ox_id Originator exchange ID
* @param ct_hdr Pointer to the CT IU
* @param cmd_rsp_code CT response code
* @param reason_code Reason code
* @param reason_code_explanation Reason code explanation
*
* @return returns 0 for success, a negative error code value for failure.
*/
int32_t
ocs_send_ct_rsp(ocs_io_t *io, uint32_t ox_id, fcct_iu_header_t *ct_hdr, uint32_t cmd_rsp_code, uint32_t reason_code, uint32_t reason_code_explanation)
{
fcct_iu_header_t *rsp = io->els_rsp.virt;
io->io_type = OCS_IO_TYPE_CT_RESP;
*rsp = *ct_hdr;
fcct_build_req_header(rsp, cmd_rsp_code, 0);
rsp->reason_code = reason_code;
rsp->reason_code_explanation = reason_code_explanation;
io->display_name = "ct response";
io->init_task_tag = ox_id;
io->wire_len += sizeof(*rsp);
ocs_memset(&io->iparam, 0, sizeof(io->iparam));
io->io_type = OCS_IO_TYPE_CT_RESP;
io->hio_type = OCS_HW_FC_CT_RSP;
io->iparam.fc_ct_rsp.ox_id = ocs_htobe16(ox_id);
io->iparam.fc_ct_rsp.r_ctl = 3;
io->iparam.fc_ct_rsp.type = FC_TYPE_GS;
io->iparam.fc_ct_rsp.df_ctl = 0;
io->iparam.fc_ct_rsp.timeout = 5;
if (ocs_scsi_io_dispatch(io, ocs_ct_acc_cb) < 0) {
ocs_els_io_free(io);
return -1;
}
return 0;
}
/**
* @brief Handle delay retry timeout
*
* Callback is invoked when the delay retry timer expires.
*
* @param arg pointer to the ELS IO object
*
* @return none
*/
static void
ocs_els_delay_timer_cb(void *arg)
{
ocs_io_t *els = arg;
ocs_node_t *node = els->node;
/*
* There is a potential deadlock here since is Linux executes timers
* in a soft IRQ context. The lock may be aready locked by the interrupt
* thread. Handle this case by attempting to take the node lock and reset the
* timer if we fail to acquire the lock.
*
* Note: This code relies on the fact that the node lock is recursive.
*/
if (ocs_node_lock_try(node)) {
ocs_els_post_event(els, OCS_EVT_TIMER_EXPIRED, NULL);
ocs_node_unlock(node);
} else {
ocs_setup_timer(els->ocs, &els->delay_timer, ocs_els_delay_timer_cb, els, 1);
}
}
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