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sys/dev/ocs_fc/ocs_unsol.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.
*
*/
/**
* @file
* Code to handle unsolicited received FC frames.
*/
/*!
* @defgroup unsol Unsolicited Frame Handling
*/
#include "ocs.h"
#include "ocs_els.h"
#include "ocs_fabric.h"
#include "ocs_device.h"
#define frame_printf(ocs, hdr, fmt, ...) \
do { \
char s_id_text[16]; \
ocs_node_fcid_display(fc_be24toh((hdr)->s_id), s_id_text, sizeof(s_id_text)); \
ocs_log_debug(ocs, "[%06x.%s] %02x/%04x/%04x: " fmt, fc_be24toh((hdr)->d_id), s_id_text, \
(hdr)->r_ctl, ocs_be16toh((hdr)->ox_id), ocs_be16toh((hdr)->rx_id), ##__VA_ARGS__); \
} while(0)
static int32_t ocs_unsol_process(ocs_t *ocs, ocs_hw_sequence_t *seq);
static int32_t ocs_dispatch_fcp_cmd(ocs_node_t *node, ocs_hw_sequence_t *seq);
static int32_t ocs_dispatch_fcp_cmd_auto_xfer_rdy(ocs_node_t *node, ocs_hw_sequence_t *seq);
static int32_t ocs_dispatch_fcp_data(ocs_node_t *node, ocs_hw_sequence_t *seq);
static int32_t ocs_domain_dispatch_frame(void *arg, ocs_hw_sequence_t *seq);
static int32_t ocs_node_dispatch_frame(void *arg, ocs_hw_sequence_t *seq);
static int32_t ocs_fc_tmf_rejected_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status, uint32_t flags, void *arg);
static ocs_hw_sequence_t *ocs_frame_next(ocs_list_t *pend_list, ocs_lock_t *list_lock);
static uint8_t ocs_node_frames_held(void *arg);
static uint8_t ocs_domain_frames_held(void *arg);
static int32_t ocs_purge_pending(ocs_t *ocs, ocs_list_t *pend_list, ocs_lock_t *list_lock);
static int32_t ocs_sframe_send_task_set_full_or_busy(ocs_node_t *node, ocs_hw_sequence_t *seq);
#define OCS_MAX_FRAMES_BEFORE_YEILDING 10000
/**
* @brief Process the RQ circular buffer and process the incoming frames.
*
* @param mythread Pointer to thread object.
*
* @return Returns 0 on success, or a non-zero value on failure.
*/
int32_t
ocs_unsol_rq_thread(ocs_thread_t *mythread)
{
ocs_xport_rq_thread_info_t *thread_data = mythread->arg;
ocs_t *ocs = thread_data->ocs;
ocs_hw_sequence_t *seq;
uint32_t yield_count = OCS_MAX_FRAMES_BEFORE_YEILDING;
ocs_log_debug(ocs, "%s running\n", mythread->name);
while (!ocs_thread_terminate_requested(mythread)) {
seq = ocs_cbuf_get(thread_data->seq_cbuf, 100000);
if (seq == NULL) {
/* Prevent soft lockups by yielding the CPU */
ocs_thread_yield(&thread_data->thread);
yield_count = OCS_MAX_FRAMES_BEFORE_YEILDING;
continue;
}
/* Note: Always returns 0 */
ocs_unsol_process((ocs_t*)seq->hw->os, seq);
/* We have to prevent CPU soft lockups, so just yield the CPU after x frames. */
if (--yield_count == 0) {
ocs_thread_yield(&thread_data->thread);
yield_count = OCS_MAX_FRAMES_BEFORE_YEILDING;
}
}
ocs_log_debug(ocs, "%s exiting\n", mythread->name);
thread_data->thread_started = FALSE;
return 0;
}
/**
* @ingroup unsol
* @brief Callback function when aborting a port owned XRI
* exchanges.
*
* @return Returns 0.
*/
static int32_t
ocs_unsol_abort_cb (ocs_hw_io_t *hio, ocs_remote_node_t *rnode, uint32_t len, int32_t status, uint32_t ext, void *arg)
{
ocs_t *ocs = arg;
ocs_assert(hio, -1);
ocs_assert(arg, -1);
ocs_log_debug(ocs, "xri=0x%x tag=0x%x\n", hio->indicator, hio->reqtag);
ocs_hw_io_free(&ocs->hw, hio);
return 0;
}
/**
* @ingroup unsol
* @brief Abort either a RQ Pair auto XFER RDY XRI.
* @return Returns None.
*/
static void
ocs_port_owned_abort(ocs_t *ocs, ocs_hw_io_t *hio)
{
ocs_hw_rtn_e hw_rc;
hw_rc = ocs_hw_io_abort(&ocs->hw, hio, FALSE,
ocs_unsol_abort_cb, ocs);
if((hw_rc == OCS_HW_RTN_IO_ABORT_IN_PROGRESS) ||
(hw_rc == OCS_HW_RTN_IO_PORT_OWNED_ALREADY_ABORTED)) {
ocs_log_debug(ocs, "already aborted XRI 0x%x\n", hio->indicator);
} else if(hw_rc != OCS_HW_RTN_SUCCESS) {
ocs_log_debug(ocs, "Error aborting XRI 0x%x status %d\n",
hio->indicator, hw_rc);
}
}
/**
* @ingroup unsol
* @brief Handle unsolicited FC frames.
*
* <h3 class="desc">Description</h3>
* This function is called from the HW with unsolicited FC frames (FCP, ELS, BLS, etc.).
*
* @param arg Application-specified callback data.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 on success; or a negative error value on failure.
*/
int32_t
ocs_unsolicited_cb(void *arg, ocs_hw_sequence_t *seq)
{
ocs_t *ocs = arg;
ocs_xport_t *xport = ocs->xport;
int32_t rc;
CPUTRACE("");
if (ocs->rq_threads == 0) {
rc = ocs_unsol_process(ocs, seq);
} else {
/* use the ox_id to dispatch this IO to a thread */
fc_header_t *hdr = seq->header->dma.virt;
uint32_t ox_id = ocs_be16toh(hdr->ox_id);
uint32_t thr_index = ox_id % ocs->rq_threads;
rc = ocs_cbuf_put(xport->rq_thread_info[thr_index].seq_cbuf, seq);
}
if (rc) {
ocs_hw_sequence_free(&ocs->hw, seq);
}
return 0;
}
/**
* @ingroup unsol
* @brief Handle unsolicited FC frames.
*
* <h3 class="desc">Description</h3>
* This function is called either from ocs_unsolicited_cb() or ocs_unsol_rq_thread().
*
* @param ocs Pointer to the ocs structure.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_unsol_process(ocs_t *ocs, ocs_hw_sequence_t *seq)
{
ocs_xport_fcfi_t *xport_fcfi = NULL;
ocs_domain_t *domain;
uint8_t seq_fcfi = seq->fcfi;
/* HW_WORKAROUND_OVERRIDE_FCFI_IN_SRB */
if (ocs->hw.workaround.override_fcfi) {
if (ocs->hw.first_domain_idx > -1) {
seq_fcfi = ocs->hw.first_domain_idx;
}
}
/* Range check seq->fcfi */
if (seq_fcfi < ARRAY_SIZE(ocs->xport->fcfi)) {
xport_fcfi = &ocs->xport->fcfi[seq_fcfi];
}
/* If the transport FCFI entry is NULL, then drop the frame */
if (xport_fcfi == NULL) {
ocs_log_test(ocs, "FCFI %d is not valid, dropping frame\n", seq->fcfi);
if (seq->hio != NULL) {
ocs_port_owned_abort(ocs, seq->hio);
}
ocs_hw_sequence_free(&ocs->hw, seq);
return 0;
}
domain = ocs_hw_domain_get(&ocs->hw, seq_fcfi);
/*
* If we are holding frames or the domain is not yet registered or
* there's already frames on the pending list,
* then add the new frame to pending list
*/
if (domain == NULL ||
xport_fcfi->hold_frames ||
!ocs_list_empty(&xport_fcfi->pend_frames)) {
ocs_lock(&xport_fcfi->pend_frames_lock);
ocs_list_add_tail(&xport_fcfi->pend_frames, seq);
ocs_unlock(&xport_fcfi->pend_frames_lock);
if (domain != NULL) {
/* immediately process pending frames */
ocs_domain_process_pending(domain);
}
} else {
/*
* We are not holding frames and pending list is empty, just process frame.
* A non-zero return means the frame was not handled - so cleanup
*/
if (ocs_domain_dispatch_frame(domain, seq)) {
if (seq->hio != NULL) {
ocs_port_owned_abort(ocs, seq->hio);
}
ocs_hw_sequence_free(&ocs->hw, seq);
}
}
return 0;
}
/**
* @ingroup unsol
* @brief Process pending frames queued to the given node.
*
* <h3 class="desc">Description</h3>
* Frames that are queued for the \c node are dispatched and returned
* to the RQ.
*
* @param node Node of the queued frames that are to be dispatched.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
int32_t
ocs_process_node_pending(ocs_node_t *node)
{
ocs_t *ocs = node->ocs;
ocs_hw_sequence_t *seq = NULL;
uint32_t pend_frames_processed = 0;
for (;;) {
/* need to check for hold frames condition after each frame processed
* because any given frame could cause a transition to a state that
* holds frames
*/
if (ocs_node_frames_held(node)) {
break;
}
/* Get next frame/sequence */
ocs_lock(&node->pend_frames_lock);
seq = ocs_list_remove_head(&node->pend_frames);
if (seq == NULL) {
pend_frames_processed = node->pend_frames_processed;
node->pend_frames_processed = 0;
ocs_unlock(&node->pend_frames_lock);
break;
}
node->pend_frames_processed++;
ocs_unlock(&node->pend_frames_lock);
/* now dispatch frame(s) to dispatch function */
if (ocs_node_dispatch_frame(node, seq)) {
if (seq->hio != NULL) {
ocs_port_owned_abort(ocs, seq->hio);
}
ocs_hw_sequence_free(&ocs->hw, seq);
}
}
if (pend_frames_processed != 0) {
ocs_log_debug(ocs, "%u node frames held and processed\n", pend_frames_processed);
}
return 0;
}
/**
* @ingroup unsol
* @brief Process pending frames queued to the given domain.
*
* <h3 class="desc">Description</h3>
* Frames that are queued for the \c domain are dispatched and
* returned to the RQ.
*
* @param domain Domain of the queued frames that are to be
* dispatched.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
int32_t
ocs_domain_process_pending(ocs_domain_t *domain)
{
ocs_t *ocs = domain->ocs;
ocs_xport_fcfi_t *xport_fcfi;
ocs_hw_sequence_t *seq = NULL;
uint32_t pend_frames_processed = 0;
ocs_assert(domain->fcf_indicator < SLI4_MAX_FCFI, -1);
xport_fcfi = &ocs->xport->fcfi[domain->fcf_indicator];
for (;;) {
/* need to check for hold frames condition after each frame processed
* because any given frame could cause a transition to a state that
* holds frames
*/
if (ocs_domain_frames_held(domain)) {
break;
}
/* Get next frame/sequence */
ocs_lock(&xport_fcfi->pend_frames_lock);
seq = ocs_list_remove_head(&xport_fcfi->pend_frames);
if (seq == NULL) {
pend_frames_processed = xport_fcfi->pend_frames_processed;
xport_fcfi->pend_frames_processed = 0;
ocs_unlock(&xport_fcfi->pend_frames_lock);
break;
}
xport_fcfi->pend_frames_processed++;
ocs_unlock(&xport_fcfi->pend_frames_lock);
/* now dispatch frame(s) to dispatch function */
if (ocs_domain_dispatch_frame(domain, seq)) {
if (seq->hio != NULL) {
ocs_port_owned_abort(ocs, seq->hio);
}
ocs_hw_sequence_free(&ocs->hw, seq);
}
}
if (pend_frames_processed != 0) {
ocs_log_debug(ocs, "%u domain frames held and processed\n", pend_frames_processed);
}
return 0;
}
/**
* @ingroup unsol
* @brief Purge given pending list
*
* <h3 class="desc">Description</h3>
* Frames that are queued on the given pending list are
* discarded and returned to the RQ.
*
* @param ocs Pointer to ocs object.
* @param pend_list Pending list to be purged.
* @param list_lock Lock that protects pending list.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_purge_pending(ocs_t *ocs, ocs_list_t *pend_list, ocs_lock_t *list_lock)
{
ocs_hw_sequence_t *frame;
for (;;) {
frame = ocs_frame_next(pend_list, list_lock);
if (frame == NULL) {
break;
}
frame_printf(ocs, (fc_header_t*) frame->header->dma.virt, "Discarding held frame\n");
if (frame->hio != NULL) {
ocs_port_owned_abort(ocs, frame->hio);
}
ocs_hw_sequence_free(&ocs->hw, frame);
}
return 0;
}
/**
* @ingroup unsol
* @brief Purge node's pending (queued) frames.
*
* <h3 class="desc">Description</h3>
* Frames that are queued for the \c node are discarded and returned
* to the RQ.
*
* @param node Node of the queued frames that are to be discarded.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
int32_t
ocs_node_purge_pending(ocs_node_t *node)
{
return ocs_purge_pending(node->ocs, &node->pend_frames, &node->pend_frames_lock);
}
/**
* @ingroup unsol
* @brief Purge xport's pending (queued) frames.
*
* <h3 class="desc">Description</h3>
* Frames that are queued for the \c xport are discarded and
* returned to the RQ.
*
* @param domain Pointer to domain object.
*
* @return Returns 0 on success; or a negative error value on failure.
*/
int32_t
ocs_domain_purge_pending(ocs_domain_t *domain)
{
ocs_t *ocs = domain->ocs;
ocs_xport_fcfi_t *xport_fcfi;
ocs_assert(domain->fcf_indicator < SLI4_MAX_FCFI, -1);
xport_fcfi = &ocs->xport->fcfi[domain->fcf_indicator];
return ocs_purge_pending(domain->ocs,
&xport_fcfi->pend_frames,
&xport_fcfi->pend_frames_lock);
}
/**
* @ingroup unsol
* @brief Check if node's pending frames are held.
*
* @param arg Node for which the pending frame hold condition is
* checked.
*
* @return Returns 1 if node is holding pending frames, or 0
* if not.
*/
static uint8_t
ocs_node_frames_held(void *arg)
{
ocs_node_t *node = (ocs_node_t *)arg;
return node->hold_frames;
}
/**
* @ingroup unsol
* @brief Check if domain's pending frames are held.
*
* @param arg Domain for which the pending frame hold condition is
* checked.
*
* @return Returns 1 if domain is holding pending frames, or 0
* if not.
*/
static uint8_t
ocs_domain_frames_held(void *arg)
{
ocs_domain_t *domain = (ocs_domain_t *)arg;
ocs_t *ocs = domain->ocs;
ocs_xport_fcfi_t *xport_fcfi;
ocs_assert(domain != NULL, 1);
ocs_assert(domain->fcf_indicator < SLI4_MAX_FCFI, 1);
xport_fcfi = &ocs->xport->fcfi[domain->fcf_indicator];
return xport_fcfi->hold_frames;
}
/**
* @ingroup unsol
* @brief Globally (at xport level) hold unsolicited frames.
*
* <h3 class="desc">Description</h3>
* This function places a hold on processing unsolicited FC
* frames queued to the xport pending list.
*
* @param domain Pointer to domain object.
*
* @return Returns None.
*/
void
ocs_domain_hold_frames(ocs_domain_t *domain)
{
ocs_t *ocs = domain->ocs;
ocs_xport_fcfi_t *xport_fcfi;
ocs_assert(domain->fcf_indicator < SLI4_MAX_FCFI);
xport_fcfi = &ocs->xport->fcfi[domain->fcf_indicator];
if (!xport_fcfi->hold_frames) {
ocs_log_debug(domain->ocs, "hold frames set for FCFI %d\n",
domain->fcf_indicator);
xport_fcfi->hold_frames = 1;
}
}
/**
* @ingroup unsol
* @brief Clear hold on unsolicited frames.
*
* <h3 class="desc">Description</h3>
* This function clears the hold on processing unsolicited FC
* frames queued to the domain pending list.
*
* @param domain Pointer to domain object.
*
* @return Returns None.
*/
void
ocs_domain_accept_frames(ocs_domain_t *domain)
{
ocs_t *ocs = domain->ocs;
ocs_xport_fcfi_t *xport_fcfi;
ocs_assert(domain->fcf_indicator < SLI4_MAX_FCFI);
xport_fcfi = &ocs->xport->fcfi[domain->fcf_indicator];
if (xport_fcfi->hold_frames == 1) {
ocs_log_debug(domain->ocs, "hold frames cleared for FCFI %d\n",
domain->fcf_indicator);
}
xport_fcfi->hold_frames = 0;
ocs_domain_process_pending(domain);
}
/**
* @ingroup unsol
* @brief Dispatch unsolicited FC frame.
*
* <h3 class="desc">Description</h3>
* This function processes an unsolicited FC frame queued at the
* domain level.
*
* @param arg Pointer to ocs object.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 if frame processed and RX buffers cleaned
* up appropriately, -1 if frame not handled.
*/
static __inline int32_t
ocs_domain_dispatch_frame(void *arg, ocs_hw_sequence_t *seq)
{
ocs_domain_t *domain = (ocs_domain_t *)arg;
ocs_t *ocs = domain->ocs;
fc_header_t *hdr;
uint32_t s_id;
uint32_t d_id;
ocs_node_t *node = NULL;
ocs_sport_t *sport = NULL;
ocs_assert(seq->header, -1);
ocs_assert(seq->header->dma.virt, -1);
ocs_assert(seq->payload->dma.virt, -1);
hdr = seq->header->dma.virt;
/* extract the s_id and d_id */
s_id = fc_be24toh(hdr->s_id);
d_id = fc_be24toh(hdr->d_id);
sport = domain->sport;
if (sport == NULL) {
frame_printf(ocs, hdr, "phy sport for FC ID 0x%06x is NULL, dropping frame\n", d_id);
return -1;
}
if (sport->fc_id != d_id) {
/* Not a physical port IO lookup sport associated with the npiv port */
sport = ocs_sport_find(domain, d_id); /* Look up without lock */
if (sport == NULL) {
if (hdr->type == FC_TYPE_FCP) {
/* Drop frame */
ocs_log_warn(ocs, "unsolicited FCP frame with invalid d_id x%x, dropping\n",
d_id);
return -1;
} else {
/* p2p will use this case */
sport = domain->sport;
}
}
}
/* Lookup the node given the remote s_id */
node = ocs_node_find(sport, s_id);
/* If not found, then create a new node */
if (node == NULL) {
/* If this is solicited data or control based on R_CTL and there is no node context,
* then we can drop the frame
*/
if ((hdr->r_ctl == FC_RCTL_FC4_DATA) && (
(hdr->info == FC_RCTL_INFO_SOL_DATA) || (hdr->info == FC_RCTL_INFO_SOL_CTRL))) {
ocs_log_debug(ocs, "solicited data/ctrl frame without node, dropping\n");
return -1;
}
node = ocs_node_alloc(sport, s_id, FALSE, FALSE);
if (node == NULL) {
ocs_log_err(ocs, "ocs_node_alloc() failed\n");
return -1;
}
/* don't send PLOGI on ocs_d_init entry */
ocs_node_init_device(node, FALSE);
}
if (node->hold_frames || !ocs_list_empty((&node->pend_frames))) {
/* TODO: info log level
frame_printf(ocs, hdr, "Holding frame\n");
*/
/* add frame to node's pending list */
ocs_lock(&node->pend_frames_lock);
ocs_list_add_tail(&node->pend_frames, seq);
ocs_unlock(&node->pend_frames_lock);
return 0;
}
/* now dispatch frame to the node frame handler */
return ocs_node_dispatch_frame(node, seq);
}
/**
* @ingroup unsol
* @brief Dispatch a frame.
*
* <h3 class="desc">Description</h3>
* A frame is dispatched from the \c node to the handler.
*
* @param arg Node that originated the frame.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 if frame processed and RX buffers cleaned
* up appropriately, -1 if frame not handled.
*/
static int32_t
ocs_node_dispatch_frame(void *arg, ocs_hw_sequence_t *seq)
{
fc_header_t *hdr = seq->header->dma.virt;
uint32_t port_id;
ocs_node_t *node = (ocs_node_t *)arg;
int32_t rc = -1;
int32_t sit_set = 0;
port_id = fc_be24toh(hdr->s_id);
ocs_assert(port_id == node->rnode.fc_id, -1);
if (fc_be24toh(hdr->f_ctl) & FC_FCTL_END_SEQUENCE) {
/*if SIT is set */
if (fc_be24toh(hdr->f_ctl) & FC_FCTL_SEQUENCE_INITIATIVE) {
sit_set = 1;
}
switch (hdr->r_ctl) {
case FC_RCTL_ELS:
if (sit_set) {
rc = ocs_node_recv_els_frame(node, seq);
}
break;
case FC_RCTL_BLS:
if (sit_set) {
rc = ocs_node_recv_abts_frame(node, seq);
}else {
rc = ocs_node_recv_bls_no_sit(node, seq);
}
break;
case FC_RCTL_FC4_DATA:
switch(hdr->type) {
case FC_TYPE_FCP:
if (hdr->info == FC_RCTL_INFO_UNSOL_CMD) {
if (node->fcp_enabled) {
if (sit_set) {
rc = ocs_dispatch_fcp_cmd(node, seq);
}else {
/* send the auto xfer ready command */
rc = ocs_dispatch_fcp_cmd_auto_xfer_rdy(node, seq);
}
} else {
rc = ocs_node_recv_fcp_cmd(node, seq);
}
} else if (hdr->info == FC_RCTL_INFO_SOL_DATA) {
if (sit_set) {
rc = ocs_dispatch_fcp_data(node, seq);
}
}
break;
case FC_TYPE_GS:
if (sit_set) {
rc = ocs_node_recv_ct_frame(node, seq);
}
break;
default:
break;
}
break;
}
} else {
node_printf(node, "Dropping frame hdr = %08x %08x %08x %08x %08x %08x\n",
ocs_htobe32(((uint32_t *)hdr)[0]),
ocs_htobe32(((uint32_t *)hdr)[1]),
ocs_htobe32(((uint32_t *)hdr)[2]),
ocs_htobe32(((uint32_t *)hdr)[3]),
ocs_htobe32(((uint32_t *)hdr)[4]),
ocs_htobe32(((uint32_t *)hdr)[5]));
}
return rc;
}
/**
* @ingroup unsol
* @brief Dispatch unsolicited FCP frames (RQ Pair).
*
* <h3 class="desc">Description</h3>
* Dispatch unsolicited FCP frames (called from the device node state machine).
*
* @param io Pointer to the IO context.
* @param task_management_flags Task management flags from the FCP_CMND frame.
* @param node Node that originated the frame.
* @param lun 32-bit LUN from FCP_CMND frame.
*
* @return Returns None.
*/
static void
ocs_dispatch_unsolicited_tmf(ocs_io_t *io, uint8_t task_management_flags, ocs_node_t *node, uint64_t lun)
{
uint32_t i;
struct {
uint32_t mask;
ocs_scsi_tmf_cmd_e cmd;
} tmflist[] = {
{FCP_QUERY_TASK_SET, OCS_SCSI_TMF_QUERY_TASK_SET},
{FCP_ABORT_TASK_SET, OCS_SCSI_TMF_ABORT_TASK_SET},
{FCP_CLEAR_TASK_SET, OCS_SCSI_TMF_CLEAR_TASK_SET},
{FCP_QUERY_ASYNCHRONOUS_EVENT, OCS_SCSI_TMF_QUERY_ASYNCHRONOUS_EVENT},
{FCP_LOGICAL_UNIT_RESET, OCS_SCSI_TMF_LOGICAL_UNIT_RESET},
{FCP_TARGET_RESET, OCS_SCSI_TMF_TARGET_RESET},
{FCP_CLEAR_ACA, OCS_SCSI_TMF_CLEAR_ACA}};
io->exp_xfer_len = 0; /* BUG 32235 */
for (i = 0; i < ARRAY_SIZE(tmflist); i ++) {
if (tmflist[i].mask & task_management_flags) {
io->tmf_cmd = tmflist[i].cmd;
ocs_scsi_recv_tmf(io, lun, tmflist[i].cmd, NULL, 0);
break;
}
}
if (i == ARRAY_SIZE(tmflist)) {
/* Not handled */
node_printf(node, "TMF x%x rejected\n", task_management_flags);
ocs_scsi_send_tmf_resp(io, OCS_SCSI_TMF_FUNCTION_REJECTED, NULL, ocs_fc_tmf_rejected_cb, NULL);
}
}
static int32_t
ocs_validate_fcp_cmd(ocs_t *ocs, ocs_hw_sequence_t *seq)
{
size_t exp_payload_len = 0;
fcp_cmnd_iu_t *cmnd = seq->payload->dma.virt;
exp_payload_len = sizeof(fcp_cmnd_iu_t) - 16 + cmnd->additional_fcp_cdb_length;
/*
* If we received less than FCP_CMND_IU bytes, assume that the frame is
* corrupted in some way and drop it. This was seen when jamming the FCTL
* fill bytes field.
*/
if (seq->payload->dma.len < exp_payload_len) {
fc_header_t *fchdr = seq->header->dma.virt;
ocs_log_debug(ocs, "dropping ox_id %04x with payload length (%zd) less than expected (%zd)\n",
ocs_be16toh(fchdr->ox_id), seq->payload->dma.len,
exp_payload_len);
return -1;
}
return 0;
}
static void
ocs_populate_io_fcp_cmd(ocs_io_t *io, fcp_cmnd_iu_t *cmnd, fc_header_t *fchdr, uint8_t sit)
{
uint32_t *fcp_dl;
io->init_task_tag = ocs_be16toh(fchdr->ox_id);
/* note, tgt_task_tag, hw_tag set when HW io is allocated */
fcp_dl = (uint32_t*)(&(cmnd->fcp_cdb_and_dl));
fcp_dl += cmnd->additional_fcp_cdb_length;
io->exp_xfer_len = ocs_be32toh(*fcp_dl);
io->transferred = 0;
/* The upper 7 bits of CS_CTL is the frame priority thru the SAN.
* Our assertion here is, the priority given to a frame containing
* the FCP cmd should be the priority given to ALL frames contained
* in that IO. Thus we need to save the incoming CS_CTL here.
*/
if (fc_be24toh(fchdr->f_ctl) & FC_FCTL_PRIORITY_ENABLE) {
io->cs_ctl = fchdr->cs_ctl;
} else {
io->cs_ctl = 0;
}
io->seq_init = sit;
}
static uint32_t
ocs_get_flags_fcp_cmd(fcp_cmnd_iu_t *cmnd)
{
uint32_t flags = 0;
switch (cmnd->task_attribute) {
case FCP_TASK_ATTR_SIMPLE:
flags |= OCS_SCSI_CMD_SIMPLE;
break;
case FCP_TASK_ATTR_HEAD_OF_QUEUE:
flags |= OCS_SCSI_CMD_HEAD_OF_QUEUE;
break;
case FCP_TASK_ATTR_ORDERED:
flags |= OCS_SCSI_CMD_ORDERED;
break;
case FCP_TASK_ATTR_ACA:
flags |= OCS_SCSI_CMD_ACA;
break;
case FCP_TASK_ATTR_UNTAGGED:
flags |= OCS_SCSI_CMD_UNTAGGED;
break;
}
if (cmnd->wrdata)
flags |= OCS_SCSI_CMD_DIR_IN;
if (cmnd->rddata)
flags |= OCS_SCSI_CMD_DIR_OUT;
return flags;
}
/**
* @ingroup unsol
* @brief Dispatch unsolicited FCP_CMND frame.
*
* <h3 class="desc">Description</h3>
* Dispatch unsolicited FCP_CMND frame. RQ Pair mode - always
* used for RQ Pair mode since first burst is not supported.
*
* @param node Node that originated the frame.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 if frame processed and RX buffers cleaned
* up appropriately, -1 if frame not handled and RX buffers need
* to be returned.
*/
static int32_t
ocs_dispatch_fcp_cmd(ocs_node_t *node, ocs_hw_sequence_t *seq)
{
ocs_t *ocs = node->ocs;
fc_header_t *fchdr = seq->header->dma.virt;
fcp_cmnd_iu_t *cmnd = NULL;
ocs_io_t *io = NULL;
fc_vm_header_t *vhdr;
uint8_t df_ctl;
uint64_t lun = UINT64_MAX;
int32_t rc = 0;
ocs_assert(seq->payload, -1);
cmnd = seq->payload->dma.virt;
/* perform FCP_CMND validation check(s) */
if (ocs_validate_fcp_cmd(ocs, seq)) {
return -1;
}
lun = CAM_EXTLUN_BYTE_SWIZZLE(be64dec(cmnd->fcp_lun));
if (lun == UINT64_MAX) {
return -1;
}
io = ocs_scsi_io_alloc(node, OCS_SCSI_IO_ROLE_RESPONDER);
if (io == NULL) {
uint32_t send_frame_capable;
/* If we have SEND_FRAME capability, then use it to send task set full or busy */
rc = ocs_hw_get(&ocs->hw, OCS_HW_SEND_FRAME_CAPABLE, &send_frame_capable);
if ((rc == 0) && send_frame_capable) {
rc = ocs_sframe_send_task_set_full_or_busy(node, seq);
if (rc) {
ocs_log_test(ocs, "ocs_sframe_send_task_set_full_or_busy failed: %d\n", rc);
}
return rc;
}
ocs_log_err(ocs, "IO allocation failed ox_id %04x\n", ocs_be16toh(fchdr->ox_id));
return -1;
}
io->hw_priv = seq->hw_priv;
/* Check if the CMD has vmheader. */
io->app_id = 0;
df_ctl = fchdr->df_ctl;
if (df_ctl & FC_DFCTL_DEVICE_HDR_16_MASK) {
uint32_t vmhdr_offset = 0;
/* Presence of VMID. Get the vm header offset. */
if (df_ctl & FC_DFCTL_ESP_HDR_MASK) {
vmhdr_offset += FC_DFCTL_ESP_HDR_SIZE;
ocs_log_err(ocs, "ESP Header present. Fix ESP Size.\n");
}
if (df_ctl & FC_DFCTL_NETWORK_HDR_MASK) {
vmhdr_offset += FC_DFCTL_NETWORK_HDR_SIZE;
}
vhdr = (fc_vm_header_t *) ((char *)fchdr + sizeof(fc_header_t) + vmhdr_offset);
io->app_id = ocs_be32toh(vhdr->src_vmid);
}
/* RQ pair, if we got here, SIT=1 */
ocs_populate_io_fcp_cmd(io, cmnd, fchdr, TRUE);
if (cmnd->task_management_flags) {
ocs_dispatch_unsolicited_tmf(io, cmnd->task_management_flags, node, lun);
} else {
uint32_t flags = ocs_get_flags_fcp_cmd(cmnd);
/* can return failure for things like task set full and UAs,
* no need to treat as a dropped frame if rc != 0
*/
ocs_scsi_recv_cmd(io, lun, cmnd->fcp_cdb,
sizeof(cmnd->fcp_cdb) +
(cmnd->additional_fcp_cdb_length * sizeof(uint32_t)),
flags);
}
/* successfully processed, now return RX buffer to the chip */
ocs_hw_sequence_free(&ocs->hw, seq);
return 0;
}
/**
* @ingroup unsol
* @brief Dispatch unsolicited FCP_CMND frame (auto xfer rdy).
*
* <h3 class="desc">Description</h3>
* Dispatch unsolicited FCP_CMND frame that is assisted with auto xfer ready.
*
* @param node Node that originated the frame.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 if frame processed and RX buffers cleaned
* up appropriately, -1 if frame not handled and RX buffers need
* to be returned.
*/
static int32_t
ocs_dispatch_fcp_cmd_auto_xfer_rdy(ocs_node_t *node, ocs_hw_sequence_t *seq)
{
ocs_t *ocs = node->ocs;
fc_header_t *fchdr = seq->header->dma.virt;
fcp_cmnd_iu_t *cmnd = NULL;
ocs_io_t *io = NULL;
uint64_t lun = UINT64_MAX;
int32_t rc = 0;
ocs_assert(seq->payload, -1);
cmnd = seq->payload->dma.virt;
/* perform FCP_CMND validation check(s) */
if (ocs_validate_fcp_cmd(ocs, seq)) {
return -1;
}
/* make sure first burst or auto xfer_rdy is enabled */
if (!seq->auto_xrdy) {
node_printf(node, "IO is not Auto Xfr Rdy assisted, dropping FCP_CMND\n");
return -1;
}
lun = CAM_EXTLUN_BYTE_SWIZZLE(be64dec(cmnd->fcp_lun));
/* TODO should there be a check here for an error? Why do any of the
* below if the LUN decode failed? */
io = ocs_scsi_io_alloc(node, OCS_SCSI_IO_ROLE_RESPONDER);
if (io == NULL) {
uint32_t send_frame_capable;
/* If we have SEND_FRAME capability, then use it to send task set full or busy */
rc = ocs_hw_get(&ocs->hw, OCS_HW_SEND_FRAME_CAPABLE, &send_frame_capable);
if ((rc == 0) && send_frame_capable) {
rc = ocs_sframe_send_task_set_full_or_busy(node, seq);
if (rc) {
ocs_log_test(ocs, "ocs_sframe_send_task_set_full_or_busy failed: %d\n", rc);
}
return rc;
}
ocs_log_err(ocs, "IO allocation failed ox_id %04x\n", ocs_be16toh(fchdr->ox_id));
return -1;
}
io->hw_priv = seq->hw_priv;
/* RQ pair, if we got here, SIT=0 */
ocs_populate_io_fcp_cmd(io, cmnd, fchdr, FALSE);
if (cmnd->task_management_flags) {
/* first burst command better not be a TMF */
ocs_log_err(ocs, "TMF flags set 0x%x\n", cmnd->task_management_flags);
ocs_scsi_io_free(io);
return -1;
} else {
uint32_t flags = ocs_get_flags_fcp_cmd(cmnd);
/* activate HW IO */
ocs_hw_io_activate_port_owned(&ocs->hw, seq->hio);
io->hio = seq->hio;
seq->hio->ul_io = io;
io->tgt_task_tag = seq->hio->indicator;
/* Note: Data buffers are received in another call */
ocs_scsi_recv_cmd_first_burst(io, lun, cmnd->fcp_cdb,
sizeof(cmnd->fcp_cdb) +
(cmnd->additional_fcp_cdb_length * sizeof(uint32_t)),
flags, NULL, 0);
}
/* FCP_CMND processed, return RX buffer to the chip */
ocs_hw_sequence_free(&ocs->hw, seq);
return 0;
}
/**
* @ingroup unsol
* @brief Dispatch FCP data frames for auto xfer ready.
*
* <h3 class="desc">Description</h3>
* Dispatch unsolicited FCP data frames (auto xfer ready)
* containing sequence initiative transferred (SIT=1).
*
* @param node Node that originated the frame.
* @param seq Header/payload sequence buffers.
*
* @return Returns 0 if frame processed and RX buffers cleaned
* up appropriately, -1 if frame not handled.
*/
static int32_t
ocs_dispatch_fcp_data(ocs_node_t *node, ocs_hw_sequence_t *seq)
{
ocs_t *ocs = node->ocs;
ocs_hw_t *hw = &ocs->hw;
ocs_hw_io_t *hio = seq->hio;
ocs_io_t *io;
ocs_dma_t fburst[1];
ocs_assert(seq->payload, -1);
ocs_assert(hio, -1);
io = hio->ul_io;
if (io == NULL) {
ocs_log_err(ocs, "data received for NULL io, xri=0x%x\n",
hio->indicator);
return -1;
}
/*
* We only support data completions for auto xfer ready. Make sure
* this is a port owned XRI.
*/
if (!ocs_hw_is_io_port_owned(hw, seq->hio)) {
ocs_log_err(ocs, "data received for host owned XRI, xri=0x%x\n",
hio->indicator);
return -1;
}
/* For error statuses, pass the error to the target back end */
if (seq->status != OCS_HW_UNSOL_SUCCESS) {
ocs_log_err(ocs, "data with status 0x%x received, xri=0x%x\n",
seq->status, hio->indicator);
/*
* In this case, there is an existing, in-use HW IO that
* first may need to be aborted. Then, the backend will be
* notified of the error while waiting for the data.
*/
ocs_port_owned_abort(ocs, seq->hio);
/*
* HW IO has already been allocated and is waiting for data.
* Need to tell backend that an error has occurred.
*/
ocs_scsi_recv_cmd_first_burst(io, 0, NULL, 0, OCS_SCSI_FIRST_BURST_ERR, NULL, 0);
return -1;
}
/* sequence initiative has been transferred */
io->seq_init = 1;
/* convert the array of pointers to the correct type, to send to backend */
fburst[0] = seq->payload->dma;
/* the amount of first burst data was saved as "acculated sequence length" */
io->transferred = seq->payload->dma.len;
if (ocs_scsi_recv_cmd_first_burst(io, 0, NULL, 0, 0,
fburst, io->transferred)) {
ocs_log_err(ocs, "error passing first burst, xri=0x%x, oxid=0x%x\n",
hio->indicator, io->init_task_tag);
}
/* Free the header and all the accumulated payload buffers */
ocs_hw_sequence_free(&ocs->hw, seq);
return 0;
}
/**
* @ingroup unsol
* @brief Handle the callback for the TMF FUNCTION_REJECTED response.
*
* <h3 class="desc">Description</h3>
* Handle the callback of a send TMF FUNCTION_REJECTED response request.
*
* @param io Pointer to the IO context.
* @param scsi_status Status of the response.
* @param flags Callback flags.
* @param arg Callback argument.
*
* @return Returns 0 on success, or a negative error value on failure.
*/
static int32_t
ocs_fc_tmf_rejected_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status, uint32_t flags, void *arg)
{
ocs_scsi_io_free(io);
return 0;
}
/**
* @brief Return next FC frame on node->pend_frames list
*
* The next FC frame on the node->pend_frames list is returned, or NULL
* if the list is empty.
*
* @param pend_list Pending list to be purged.
* @param list_lock Lock that protects pending list.
*
* @return Returns pointer to the next FC frame, or NULL if the pending frame list
* is empty.
*/
static ocs_hw_sequence_t *
ocs_frame_next(ocs_list_t *pend_list, ocs_lock_t *list_lock)
{
ocs_hw_sequence_t *frame = NULL;
ocs_lock(list_lock);
frame = ocs_list_remove_head(pend_list);
ocs_unlock(list_lock);
return frame;
}
/**
* @brief Process send fcp response frame callback
*
* The function is called when the send FCP response posting has completed. Regardless
* of the outcome, the sequence is freed.
*
* @param arg Pointer to originator frame sequence.
* @param cqe Pointer to completion queue entry.
* @param status Status of operation.
*
* @return None.
*/
static void
ocs_sframe_common_send_cb(void *arg, uint8_t *cqe, int32_t status)
{
ocs_hw_send_frame_context_t *ctx = arg;
ocs_hw_t *hw = ctx->hw;
/* Free WQ completion callback */
ocs_hw_reqtag_free(hw, ctx->wqcb);
/* Free sequence */
ocs_hw_sequence_free(hw, ctx->seq);
}
/**
* @brief Send a frame, common code
*
* A frame is sent using SEND_FRAME, the R_CTL/F_CTL/TYPE may be specified, the payload is
* sent as a single frame.
*
* Memory resources are allocated from RQ buffers contained in the passed in sequence data.
*
* @param node Pointer to node object.
* @param seq Pointer to sequence object.
* @param r_ctl R_CTL value to place in FC header.
* @param info INFO value to place in FC header.
* @param f_ctl F_CTL value to place in FC header.
* @param type TYPE value to place in FC header.
* @param payload Pointer to payload data
* @param payload_len Length of payload in bytes.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_sframe_common_send(ocs_node_t *node, ocs_hw_sequence_t *seq, uint8_t r_ctl, uint8_t info, uint32_t f_ctl,
uint8_t type, void *payload, uint32_t payload_len)
{
ocs_t *ocs = node->ocs;
ocs_hw_t *hw = &ocs->hw;
ocs_hw_rtn_e rc = 0;
fc_header_t *behdr = seq->header->dma.virt;
fc_header_le_t hdr;
uint32_t s_id = fc_be24toh(behdr->s_id);
uint32_t d_id = fc_be24toh(behdr->d_id);
uint16_t ox_id = ocs_be16toh(behdr->ox_id);
uint16_t rx_id = ocs_be16toh(behdr->rx_id);
ocs_hw_send_frame_context_t *ctx;
uint32_t heap_size = seq->payload->dma.size;
uintptr_t heap_phys_base = seq->payload->dma.phys;
uint8_t *heap_virt_base = seq->payload->dma.virt;
uint32_t heap_offset = 0;
/* Build the FC header reusing the RQ header DMA buffer */
ocs_memset(&hdr, 0, sizeof(hdr));
hdr.d_id = s_id; /* send it back to whomever sent it to us */
hdr.r_ctl = r_ctl;
hdr.info = info;
hdr.s_id = d_id;
hdr.cs_ctl = 0;
hdr.f_ctl = f_ctl;
hdr.type = type;
hdr.seq_cnt = 0;
hdr.df_ctl = 0;
/*
* send_frame_seq_id is an atomic, we just let it increment, while storing only
* the low 8 bits to hdr->seq_id
*/
hdr.seq_id = (uint8_t) ocs_atomic_add_return(&hw->send_frame_seq_id, 1);
hdr.rx_id = rx_id;
hdr.ox_id = ox_id;
hdr.parameter = 0;
/* Allocate and fill in the send frame request context */
ctx = (void*)(heap_virt_base + heap_offset);
heap_offset += sizeof(*ctx);
ocs_assert(heap_offset < heap_size, -1);
ocs_memset(ctx, 0, sizeof(*ctx));
/* Save sequence */
ctx->seq = seq;
/* Allocate a response payload DMA buffer from the heap */
ctx->payload.phys = heap_phys_base + heap_offset;
ctx->payload.virt = heap_virt_base + heap_offset;
ctx->payload.size = payload_len;
ctx->payload.len = payload_len;
heap_offset += payload_len;
ocs_assert(heap_offset <= heap_size, -1);
/* Copy the payload in */
ocs_memcpy(ctx->payload.virt, payload, payload_len);
/* Send */
rc = ocs_hw_send_frame(&ocs->hw, (void*)&hdr, FC_SOFI3, FC_EOFT, &ctx->payload, ctx,
ocs_sframe_common_send_cb, ctx);
if (rc) {
ocs_log_test(ocs, "ocs_hw_send_frame failed: %d\n", rc);
}
return rc ? -1 : 0;
}
/**
* @brief Send FCP response using SEND_FRAME
*
* The FCP response is send using the SEND_FRAME function.
*
* @param node Pointer to node object.
* @param seq Pointer to inbound sequence.
* @param rsp Pointer to response data.
* @param rsp_len Length of response data, in bytes.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_sframe_send_fcp_rsp(ocs_node_t *node, ocs_hw_sequence_t *seq, void *rsp, uint32_t rsp_len)
{
return ocs_sframe_common_send(node, seq,
FC_RCTL_FC4_DATA,
FC_RCTL_INFO_CMD_STATUS,
FC_FCTL_EXCHANGE_RESPONDER |
FC_FCTL_LAST_SEQUENCE |
FC_FCTL_END_SEQUENCE |
FC_FCTL_SEQUENCE_INITIATIVE,
FC_TYPE_FCP,
rsp, rsp_len);
}
/**
* @brief Send task set full response
*
* Return a task set full or busy response using send frame.
*
* @param node Pointer to node object.
* @param seq Pointer to originator frame sequence.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
static int32_t
ocs_sframe_send_task_set_full_or_busy(ocs_node_t *node, ocs_hw_sequence_t *seq)
{
fcp_rsp_iu_t fcprsp;
fcp_cmnd_iu_t *fcpcmd = seq->payload->dma.virt;
uint32_t *fcp_dl_ptr;
uint32_t fcp_dl;
int32_t rc = 0;
/* extract FCP_DL from FCP command*/
fcp_dl_ptr = (uint32_t*)(&(fcpcmd->fcp_cdb_and_dl));
fcp_dl_ptr += fcpcmd->additional_fcp_cdb_length;
fcp_dl = ocs_be32toh(*fcp_dl_ptr);
/* construct task set full or busy response */
ocs_memset(&fcprsp, 0, sizeof(fcprsp));
ocs_lock(&node->active_ios_lock);
fcprsp.scsi_status = ocs_list_empty(&node->active_ios) ? SCSI_STATUS_BUSY : SCSI_STATUS_TASK_SET_FULL;
ocs_unlock(&node->active_ios_lock);
*((uint32_t*)&fcprsp.fcp_resid) = fcp_dl;
/* send it using send_frame */
rc = ocs_sframe_send_fcp_rsp(node, seq, &fcprsp, sizeof(fcprsp) - sizeof(fcprsp.data));
if (rc) {
ocs_log_test(node->ocs, "ocs_sframe_send_fcp_rsp failed: %d\n", rc);
}
return rc;
}
/**
* @brief Send BA_ACC using sent frame
*
* A BA_ACC is sent using SEND_FRAME
*
* @param node Pointer to node object.
* @param seq Pointer to originator frame sequence.
*
* @return Returns 0 on success, or a negative error code value on failure.
*/
int32_t
ocs_sframe_send_bls_acc(ocs_node_t *node, ocs_hw_sequence_t *seq)
{
fc_header_t *behdr = seq->header->dma.virt;
uint16_t ox_id = ocs_be16toh(behdr->ox_id);
uint16_t rx_id = ocs_be16toh(behdr->rx_id);
fc_ba_acc_payload_t acc = {0};
acc.ox_id = ocs_htobe16(ox_id);
acc.rx_id = ocs_htobe16(rx_id);
acc.low_seq_cnt = UINT16_MAX;
acc.high_seq_cnt = UINT16_MAX;
return ocs_sframe_common_send(node, seq,
FC_RCTL_BLS,
FC_RCTL_INFO_UNSOL_DATA,
FC_FCTL_EXCHANGE_RESPONDER |
FC_FCTL_LAST_SEQUENCE |
FC_FCTL_END_SEQUENCE,
FC_TYPE_BASIC_LINK,
&acc, sizeof(acc));
}