/*
* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <bfa.h>
#include <cs/bfa_debug.h>
#include <bfa_cb_ioim_macros.h>
BFA_TRC_FILE(HAL, IOIM);
/*
* forward declarations.
*/
static bfa_boolean_t bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim);
static bfa_boolean_t bfa_ioim_sge_setup(struct bfa_ioim_s *ioim);
static void bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim);
static bfa_boolean_t bfa_ioim_send_abort(struct bfa_ioim_s *ioim);
static void bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim);
static void __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete);
/**
* bfa_ioim_sm
*/
/**
* IO state machine events
*/
enum bfa_ioim_event {
BFA_IOIM_SM_START = 1, /* io start request from host */
BFA_IOIM_SM_COMP_GOOD = 2, /* io good comp, resource free */
BFA_IOIM_SM_COMP = 3, /* io comp, resource is free */
BFA_IOIM_SM_COMP_UTAG = 4, /* io comp, resource is free */
BFA_IOIM_SM_DONE = 5, /* io comp, resource not free */
BFA_IOIM_SM_FREE = 6, /* io resource is freed */
BFA_IOIM_SM_ABORT = 7, /* abort request from scsi stack */
BFA_IOIM_SM_ABORT_COMP = 8, /* abort from f/w */
BFA_IOIM_SM_ABORT_DONE = 9, /* abort completion from f/w */
BFA_IOIM_SM_QRESUME = 10, /* CQ space available to queue IO */
BFA_IOIM_SM_SGALLOCED = 11, /* SG page allocation successful */
BFA_IOIM_SM_SQRETRY = 12, /* sequence recovery retry */
BFA_IOIM_SM_HCB = 13, /* bfa callback complete */
BFA_IOIM_SM_CLEANUP = 14, /* IO cleanup from itnim */
BFA_IOIM_SM_TMSTART = 15, /* IO cleanup from tskim */
BFA_IOIM_SM_TMDONE = 16, /* IO cleanup from tskim */
BFA_IOIM_SM_HWFAIL = 17, /* IOC h/w failure event */
BFA_IOIM_SM_IOTOV = 18, /* ITN offline TOV */
};
/*
* forward declaration of IO state machine
*/
static void bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_active(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_abort(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
static void bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim,
enum bfa_ioim_event event);
/**
* IO is not started (unallocated).
*/
static void
bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc_fp(ioim->bfa, ioim->iotag);
bfa_trc_fp(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_START:
if (!bfa_itnim_is_online(ioim->itnim)) {
if (!bfa_itnim_hold_io(ioim->itnim)) {
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe,
&ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
__bfa_cb_ioim_pathtov, ioim);
} else {
list_del(&ioim->qe);
list_add_tail(&ioim->qe,
&ioim->itnim->pending_q);
}
break;
}
if (ioim->nsges > BFI_SGE_INLINE) {
if (!bfa_ioim_sge_setup(ioim)) {
bfa_sm_set_state(ioim, bfa_ioim_sm_sgalloc);
return;
}
}
if (!bfa_ioim_send_ioreq(ioim)) {
bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
break;
}
bfa_sm_set_state(ioim, bfa_ioim_sm_active);
break;
case BFA_IOIM_SM_IOTOV:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
__bfa_cb_ioim_pathtov, ioim);
break;
case BFA_IOIM_SM_ABORT:
/**
* IO in pending queue can get abort requests. Complete abort
* requests immediately.
*/
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_assert(bfa_q_is_on_q(&ioim->itnim->pending_q, ioim));
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is waiting for SG pages.
*/
static void
bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_SGALLOCED:
if (!bfa_ioim_send_ioreq(ioim)) {
bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
break;
}
bfa_sm_set_state(ioim, bfa_ioim_sm_active);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_ABORT:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is active.
*/
static void
bfa_ioim_sm_active(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc_fp(ioim->bfa, ioim->iotag);
bfa_trc_fp(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_COMP_GOOD:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
__bfa_cb_ioim_good_comp, ioim);
break;
case BFA_IOIM_SM_COMP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
ioim);
break;
case BFA_IOIM_SM_DONE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
ioim);
break;
case BFA_IOIM_SM_ABORT:
ioim->iosp->abort_explicit = BFA_TRUE;
ioim->io_cbfn = __bfa_cb_ioim_abort;
if (bfa_ioim_send_abort(ioim))
bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
else {
bfa_sm_set_state(ioim, bfa_ioim_sm_abort_qfull);
bfa_reqq_wait(ioim->bfa, ioim->reqq,
&ioim->iosp->reqq_wait);
}
break;
case BFA_IOIM_SM_CLEANUP:
ioim->iosp->abort_explicit = BFA_FALSE;
ioim->io_cbfn = __bfa_cb_ioim_failed;
if (bfa_ioim_send_abort(ioim))
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
else {
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
bfa_reqq_wait(ioim->bfa, ioim->reqq,
&ioim->iosp->reqq_wait);
}
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is being aborted, waiting for completion from firmware.
*/
static void
bfa_ioim_sm_abort(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_COMP_GOOD:
case BFA_IOIM_SM_COMP:
case BFA_IOIM_SM_DONE:
case BFA_IOIM_SM_FREE:
break;
case BFA_IOIM_SM_ABORT_DONE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_ABORT_COMP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_COMP_UTAG:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE);
ioim->iosp->abort_explicit = BFA_FALSE;
if (bfa_ioim_send_abort(ioim))
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
else {
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
bfa_reqq_wait(ioim->bfa, ioim->reqq,
&ioim->iosp->reqq_wait);
}
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is being cleaned up (implicit abort), waiting for completion from
* firmware.
*/
static void
bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_COMP_GOOD:
case BFA_IOIM_SM_COMP:
case BFA_IOIM_SM_DONE:
case BFA_IOIM_SM_FREE:
break;
case BFA_IOIM_SM_ABORT:
/**
* IO is already being aborted implicitly
*/
ioim->io_cbfn = __bfa_cb_ioim_abort;
break;
case BFA_IOIM_SM_ABORT_DONE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_ABORT_COMP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_COMP_UTAG:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
case BFA_IOIM_SM_CLEANUP:
/**
* IO can be in cleanup state already due to TM command. 2nd cleanup
* request comes from ITN offline event.
*/
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is waiting for room in request CQ
*/
static void
bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_QRESUME:
bfa_sm_set_state(ioim, bfa_ioim_sm_active);
bfa_ioim_send_ioreq(ioim);
break;
case BFA_IOIM_SM_ABORT:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* Active IO is being aborted, waiting for room in request CQ.
*/
static void
bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_QRESUME:
bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
bfa_ioim_send_abort(ioim);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_assert(ioim->iosp->abort_explicit == BFA_TRUE);
ioim->iosp->abort_explicit = BFA_FALSE;
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
break;
case BFA_IOIM_SM_COMP_GOOD:
case BFA_IOIM_SM_COMP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_DONE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* Active IO is being cleaned up, waiting for room in request CQ.
*/
static void
bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_QRESUME:
bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
bfa_ioim_send_abort(ioim);
break;
case BFA_IOIM_SM_ABORT:
/**
* IO is already being cleaned up implicitly
*/
ioim->io_cbfn = __bfa_cb_ioim_abort;
break;
case BFA_IOIM_SM_COMP_GOOD:
case BFA_IOIM_SM_COMP:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_DONE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
ioim);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO bfa callback is pending.
*/
static void
bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc_fp(ioim->bfa, ioim->iotag);
bfa_trc_fp(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_HCB:
bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
bfa_ioim_free(ioim);
bfa_cb_ioim_resfree(ioim->bfa->bfad);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO bfa callback is pending. IO resource cannot be freed.
*/
static void
bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_HCB:
bfa_sm_set_state(ioim, bfa_ioim_sm_resfree);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_resfree_q);
break;
case BFA_IOIM_SM_FREE:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* IO is completed, waiting resource free from firmware.
*/
static void
bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, event);
switch (event) {
case BFA_IOIM_SM_FREE:
bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
bfa_ioim_free(ioim);
bfa_cb_ioim_resfree(ioim->bfa->bfad);
break;
case BFA_IOIM_SM_CLEANUP:
bfa_ioim_notify_cleanup(ioim);
break;
case BFA_IOIM_SM_HWFAIL:
break;
default:
bfa_sm_fault(ioim->bfa, event);
}
}
/**
* bfa_ioim_private
*/
static void
__bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete)
{
struct bfa_ioim_s *ioim = cbarg;
if (!complete) {
bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
return;
}
bfa_cb_ioim_good_comp(ioim->bfa->bfad, ioim->dio);
}
static void
__bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete)
{
struct bfa_ioim_s *ioim = cbarg;
struct bfi_ioim_rsp_s *m;
u8 *snsinfo = NULL;
u8 sns_len = 0;
s32 residue = 0;
if (!complete) {
bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
return;
}
m = (struct bfi_ioim_rsp_s *) &ioim->iosp->comp_rspmsg;
if (m->io_status == BFI_IOIM_STS_OK) {
/**
* setup sense information, if present
*/
if (m->scsi_status == SCSI_STATUS_CHECK_CONDITION
&& m->sns_len) {
sns_len = m->sns_len;
snsinfo = ioim->iosp->snsinfo;
}
/**
* setup residue value correctly for normal completions
*/
if (m->resid_flags == FCP_RESID_UNDER)
residue = bfa_os_ntohl(m->residue);
if (m->resid_flags == FCP_RESID_OVER) {
residue = bfa_os_ntohl(m->residue);
residue = -residue;
}
}
bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, m->io_status,
m->scsi_status, sns_len, snsinfo, residue);
}
static void
__bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
{
struct bfa_ioim_s *ioim = cbarg;
if (!complete) {
bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
return;
}
bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_ABORTED,
0, 0, NULL, 0);
}
static void
__bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete)
{
struct bfa_ioim_s *ioim = cbarg;
if (!complete) {
bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
return;
}
bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_PATHTOV,
0, 0, NULL, 0);
}
static void
__bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete)
{
struct bfa_ioim_s *ioim = cbarg;
if (!complete) {
bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
return;
}
bfa_cb_ioim_abort(ioim->bfa->bfad, ioim->dio);
}
static void
bfa_ioim_sgpg_alloced(void *cbarg)
{
struct bfa_ioim_s *ioim = cbarg;
ioim->nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
list_splice_tail_init(&ioim->iosp->sgpg_wqe.sgpg_q, &ioim->sgpg_q);
bfa_ioim_sgpg_setup(ioim);
bfa_sm_send_event(ioim, BFA_IOIM_SM_SGALLOCED);
}
/**
* Send I/O request to firmware.
*/
static bfa_boolean_t
bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim)
{
struct bfa_itnim_s *itnim = ioim->itnim;
struct bfi_ioim_req_s *m;
static struct fcp_cmnd_s cmnd_z0 = { 0 };
struct bfi_sge_s *sge;
u32 pgdlen = 0;
u64 addr;
struct scatterlist *sg;
struct scsi_cmnd *cmnd = (struct scsi_cmnd *) ioim->dio;
/**
* check for room in queue to send request now
*/
m = bfa_reqq_next(ioim->bfa, ioim->reqq);
if (!m) {
bfa_reqq_wait(ioim->bfa, ioim->reqq,
&ioim->iosp->reqq_wait);
return BFA_FALSE;
}
/**
* build i/o request message next
*/
m->io_tag = bfa_os_htons(ioim->iotag);
m->rport_hdl = ioim->itnim->rport->fw_handle;
m->io_timeout = bfa_cb_ioim_get_timeout(ioim->dio);
/**
* build inline IO SG element here
*/
sge = &m->sges[0];
if (ioim->nsges) {
sg = (struct scatterlist *)scsi_sglist(cmnd);
addr = bfa_os_sgaddr(sg_dma_address(sg));
sge->sga = *(union bfi_addr_u *) &addr;
pgdlen = sg_dma_len(sg);
sge->sg_len = pgdlen;
sge->flags = (ioim->nsges > BFI_SGE_INLINE) ?
BFI_SGE_DATA_CPL : BFI_SGE_DATA_LAST;
bfa_sge_to_be(sge);
sge++;
}
if (ioim->nsges > BFI_SGE_INLINE) {
sge->sga = ioim->sgpg->sgpg_pa;
} else {
sge->sga.a32.addr_lo = 0;
sge->sga.a32.addr_hi = 0;
}
sge->sg_len = pgdlen;
sge->flags = BFI_SGE_PGDLEN;
bfa_sge_to_be(sge);
/**
* set up I/O command parameters
*/
bfa_os_assign(m->cmnd, cmnd_z0);
m->cmnd.lun = bfa_cb_ioim_get_lun(ioim->dio);
m->cmnd.iodir = bfa_cb_ioim_get_iodir(ioim->dio);
bfa_os_assign(m->cmnd.cdb,
*(struct scsi_cdb_s *)bfa_cb_ioim_get_cdb(ioim->dio));
m->cmnd.fcp_dl = bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio));
/**
* set up I/O message header
*/
switch (m->cmnd.iodir) {
case FCP_IODIR_READ:
bfi_h2i_set(m->mh, BFI_MC_IOIM_READ, 0, bfa_lpuid(ioim->bfa));
bfa_stats(itnim, input_reqs);
break;
case FCP_IODIR_WRITE:
bfi_h2i_set(m->mh, BFI_MC_IOIM_WRITE, 0, bfa_lpuid(ioim->bfa));
bfa_stats(itnim, output_reqs);
break;
case FCP_IODIR_RW:
bfa_stats(itnim, input_reqs);
bfa_stats(itnim, output_reqs);
default:
bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa));
}
if (itnim->seq_rec ||
(bfa_cb_ioim_get_size(ioim->dio) & (sizeof(u32) - 1)))
bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_lpuid(ioim->bfa));
#ifdef IOIM_ADVANCED
m->cmnd.crn = bfa_cb_ioim_get_crn(ioim->dio);
m->cmnd.priority = bfa_cb_ioim_get_priority(ioim->dio);
m->cmnd.taskattr = bfa_cb_ioim_get_taskattr(ioim->dio);
/**
* Handle large CDB (>16 bytes).
*/
m->cmnd.addl_cdb_len = (bfa_cb_ioim_get_cdblen(ioim->dio) -
FCP_CMND_CDB_LEN) / sizeof(u32);
if (m->cmnd.addl_cdb_len) {
bfa_os_memcpy(&m->cmnd.cdb + 1, (struct scsi_cdb_s *)
bfa_cb_ioim_get_cdb(ioim->dio) + 1,
m->cmnd.addl_cdb_len * sizeof(u32));
fcp_cmnd_fcpdl(&m->cmnd) =
bfa_os_htonl(bfa_cb_ioim_get_size(ioim->dio));
}
#endif
/**
* queue I/O message to firmware
*/
bfa_reqq_produce(ioim->bfa, ioim->reqq);
return BFA_TRUE;
}
/**
* Setup any additional SG pages needed.Inline SG element is setup
* at queuing time.
*/
static bfa_boolean_t
bfa_ioim_sge_setup(struct bfa_ioim_s *ioim)
{
u16 nsgpgs;
bfa_assert(ioim->nsges > BFI_SGE_INLINE);
/**
* allocate SG pages needed
*/
nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
if (!nsgpgs)
return BFA_TRUE;
if (bfa_sgpg_malloc(ioim->bfa, &ioim->sgpg_q, nsgpgs)
!= BFA_STATUS_OK) {
bfa_sgpg_wait(ioim->bfa, &ioim->iosp->sgpg_wqe, nsgpgs);
return BFA_FALSE;
}
ioim->nsgpgs = nsgpgs;
bfa_ioim_sgpg_setup(ioim);
return BFA_TRUE;
}
static void
bfa_ioim_sgpg_setup(struct bfa_ioim_s *ioim)
{
int sgeid, nsges, i;
struct bfi_sge_s *sge;
struct bfa_sgpg_s *sgpg;
u32 pgcumsz;
u64 addr;
struct scatterlist *sg;
struct scsi_cmnd *cmnd = (struct scsi_cmnd *) ioim->dio;
sgeid = BFI_SGE_INLINE;
ioim->sgpg = sgpg = bfa_q_first(&ioim->sgpg_q);
sg = scsi_sglist(cmnd);
sg = sg_next(sg);
do {
sge = sgpg->sgpg->sges;
nsges = ioim->nsges - sgeid;
if (nsges > BFI_SGPG_DATA_SGES)
nsges = BFI_SGPG_DATA_SGES;
pgcumsz = 0;
for (i = 0; i < nsges; i++, sge++, sgeid++, sg = sg_next(sg)) {
addr = bfa_os_sgaddr(sg_dma_address(sg));
sge->sga = *(union bfi_addr_u *) &addr;
sge->sg_len = sg_dma_len(sg);
pgcumsz += sge->sg_len;
/**
* set flags
*/
if (i < (nsges - 1))
sge->flags = BFI_SGE_DATA;
else if (sgeid < (ioim->nsges - 1))
sge->flags = BFI_SGE_DATA_CPL;
else
sge->flags = BFI_SGE_DATA_LAST;
}
sgpg = (struct bfa_sgpg_s *) bfa_q_next(sgpg);
/**
* set the link element of each page
*/
if (sgeid == ioim->nsges) {
sge->flags = BFI_SGE_PGDLEN;
sge->sga.a32.addr_lo = 0;
sge->sga.a32.addr_hi = 0;
} else {
sge->flags = BFI_SGE_LINK;
sge->sga = sgpg->sgpg_pa;
}
sge->sg_len = pgcumsz;
} while (sgeid < ioim->nsges);
}
/**
* Send I/O abort request to firmware.
*/
static bfa_boolean_t
bfa_ioim_send_abort(struct bfa_ioim_s *ioim)
{
struct bfi_ioim_abort_req_s *m;
enum bfi_ioim_h2i msgop;
/**
* check for room in queue to send request now
*/
m = bfa_reqq_next(ioim->bfa, ioim->reqq);
if (!m)
return BFA_FALSE;
/**
* build i/o request message next
*/
if (ioim->iosp->abort_explicit)
msgop = BFI_IOIM_H2I_IOABORT_REQ;
else
msgop = BFI_IOIM_H2I_IOCLEANUP_REQ;
bfi_h2i_set(m->mh, BFI_MC_IOIM, msgop, bfa_lpuid(ioim->bfa));
m->io_tag = bfa_os_htons(ioim->iotag);
m->abort_tag = ++ioim->abort_tag;
/**
* queue I/O message to firmware
*/
bfa_reqq_produce(ioim->bfa, ioim->reqq);
return BFA_TRUE;
}
/**
* Call to resume any I/O requests waiting for room in request queue.
*/
static void
bfa_ioim_qresume(void *cbarg)
{
struct bfa_ioim_s *ioim = cbarg;
bfa_fcpim_stats(ioim->fcpim, qresumes);
bfa_sm_send_event(ioim, BFA_IOIM_SM_QRESUME);
}
static void
bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim)
{
/**
* Move IO from itnim queue to fcpim global queue since itnim will be
* freed.
*/
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
if (!ioim->iosp->tskim) {
if (ioim->fcpim->delay_comp && ioim->itnim->iotov_active) {
bfa_cb_dequeue(&ioim->hcb_qe);
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->itnim->delay_comp_q);
}
bfa_itnim_iodone(ioim->itnim);
} else
bfa_tskim_iodone(ioim->iosp->tskim);
}
/**
* or after the link comes back.
*/
void
bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, bfa_boolean_t iotov)
{
/**
* If path tov timer expired, failback with PATHTOV status - these
* IO requests are not normally retried by IO stack.
*
* Otherwise device cameback online and fail it with normal failed
* status so that IO stack retries these failed IO requests.
*/
if (iotov)
ioim->io_cbfn = __bfa_cb_ioim_pathtov;
else
ioim->io_cbfn = __bfa_cb_ioim_failed;
bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
/**
* Move IO to fcpim global queue since itnim will be
* freed.
*/
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
}
/**
* bfa_ioim_friend
*/
/**
* Memory allocation and initialization.
*/
void
bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo)
{
struct bfa_ioim_s *ioim;
struct bfa_ioim_sp_s *iosp;
u16 i;
u8 *snsinfo;
u32 snsbufsz;
/**
* claim memory first
*/
ioim = (struct bfa_ioim_s *) bfa_meminfo_kva(minfo);
fcpim->ioim_arr = ioim;
bfa_meminfo_kva(minfo) = (u8 *) (ioim + fcpim->num_ioim_reqs);
iosp = (struct bfa_ioim_sp_s *) bfa_meminfo_kva(minfo);
fcpim->ioim_sp_arr = iosp;
bfa_meminfo_kva(minfo) = (u8 *) (iosp + fcpim->num_ioim_reqs);
/**
* Claim DMA memory for per IO sense data.
*/
snsbufsz = fcpim->num_ioim_reqs * BFI_IOIM_SNSLEN;
fcpim->snsbase.pa = bfa_meminfo_dma_phys(minfo);
bfa_meminfo_dma_phys(minfo) += snsbufsz;
fcpim->snsbase.kva = bfa_meminfo_dma_virt(minfo);
bfa_meminfo_dma_virt(minfo) += snsbufsz;
snsinfo = fcpim->snsbase.kva;
bfa_iocfc_set_snsbase(fcpim->bfa, fcpim->snsbase.pa);
/**
* Initialize ioim free queues
*/
INIT_LIST_HEAD(&fcpim->ioim_free_q);
INIT_LIST_HEAD(&fcpim->ioim_resfree_q);
INIT_LIST_HEAD(&fcpim->ioim_comp_q);
for (i = 0; i < fcpim->num_ioim_reqs;
i++, ioim++, iosp++, snsinfo += BFI_IOIM_SNSLEN) {
/*
* initialize IOIM
*/
bfa_os_memset(ioim, 0, sizeof(struct bfa_ioim_s));
ioim->iotag = i;
ioim->bfa = fcpim->bfa;
ioim->fcpim = fcpim;
ioim->iosp = iosp;
iosp->snsinfo = snsinfo;
INIT_LIST_HEAD(&ioim->sgpg_q);
bfa_reqq_winit(&ioim->iosp->reqq_wait,
bfa_ioim_qresume, ioim);
bfa_sgpg_winit(&ioim->iosp->sgpg_wqe,
bfa_ioim_sgpg_alloced, ioim);
bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
list_add_tail(&ioim->qe, &fcpim->ioim_free_q);
}
}
/**
* Driver detach time call.
*/
void
bfa_ioim_detach(struct bfa_fcpim_mod_s *fcpim)
{
}
void
bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
struct bfa_ioim_s *ioim;
u16 iotag;
enum bfa_ioim_event evt = BFA_IOIM_SM_COMP;
iotag = bfa_os_ntohs(rsp->io_tag);
ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
bfa_assert(ioim->iotag == iotag);
bfa_trc(ioim->bfa, ioim->iotag);
bfa_trc(ioim->bfa, rsp->io_status);
bfa_trc(ioim->bfa, rsp->reuse_io_tag);
if (bfa_sm_cmp_state(ioim, bfa_ioim_sm_active))
bfa_os_assign(ioim->iosp->comp_rspmsg, *m);
switch (rsp->io_status) {
case BFI_IOIM_STS_OK:
bfa_fcpim_stats(fcpim, iocomp_ok);
if (rsp->reuse_io_tag == 0)
evt = BFA_IOIM_SM_DONE;
else
evt = BFA_IOIM_SM_COMP;
break;
case BFI_IOIM_STS_TIMEDOUT:
case BFI_IOIM_STS_ABORTED:
rsp->io_status = BFI_IOIM_STS_ABORTED;
bfa_fcpim_stats(fcpim, iocomp_aborted);
if (rsp->reuse_io_tag == 0)
evt = BFA_IOIM_SM_DONE;
else
evt = BFA_IOIM_SM_COMP;
break;
case BFI_IOIM_STS_PROTO_ERR:
bfa_fcpim_stats(fcpim, iocom_proto_err);
bfa_assert(rsp->reuse_io_tag);
evt = BFA_IOIM_SM_COMP;
break;
case BFI_IOIM_STS_SQER_NEEDED:
bfa_fcpim_stats(fcpim, iocom_sqer_needed);
bfa_assert(rsp->reuse_io_tag == 0);
evt = BFA_IOIM_SM_SQRETRY;
break;
case BFI_IOIM_STS_RES_FREE:
bfa_fcpim_stats(fcpim, iocom_res_free);
evt = BFA_IOIM_SM_FREE;
break;
case BFI_IOIM_STS_HOST_ABORTED:
bfa_fcpim_stats(fcpim, iocom_hostabrts);
if (rsp->abort_tag != ioim->abort_tag) {
bfa_trc(ioim->bfa, rsp->abort_tag);
bfa_trc(ioim->bfa, ioim->abort_tag);
return;
}
if (rsp->reuse_io_tag)
evt = BFA_IOIM_SM_ABORT_COMP;
else
evt = BFA_IOIM_SM_ABORT_DONE;
break;
case BFI_IOIM_STS_UTAG:
bfa_fcpim_stats(fcpim, iocom_utags);
evt = BFA_IOIM_SM_COMP_UTAG;
break;
default:
bfa_assert(0);
}
bfa_sm_send_event(ioim, evt);
}
void
bfa_ioim_good_comp_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
struct bfa_ioim_s *ioim;
u16 iotag;
iotag = bfa_os_ntohs(rsp->io_tag);
ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
bfa_assert(ioim->iotag == iotag);
bfa_trc_fp(ioim->bfa, ioim->iotag);
bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD);
}
/**
* Called by itnim to clean up IO while going offline.
*/
void
bfa_ioim_cleanup(struct bfa_ioim_s *ioim)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_fcpim_stats(ioim->fcpim, io_cleanups);
ioim->iosp->tskim = NULL;
bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}
void
bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, struct bfa_tskim_s *tskim)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_fcpim_stats(ioim->fcpim, io_tmaborts);
ioim->iosp->tskim = tskim;
bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}
/**
* IOC failure handling.
*/
void
bfa_ioim_iocdisable(struct bfa_ioim_s *ioim)
{
bfa_sm_send_event(ioim, BFA_IOIM_SM_HWFAIL);
}
/**
* IO offline TOV popped. Fail the pending IO.
*/
void
bfa_ioim_tov(struct bfa_ioim_s *ioim)
{
bfa_sm_send_event(ioim, BFA_IOIM_SM_IOTOV);
}
/**
* bfa_ioim_api
*/
/**
* Allocate IOIM resource for initiator mode I/O request.
*/
struct bfa_ioim_s *
bfa_ioim_alloc(struct bfa_s *bfa, struct bfad_ioim_s *dio,
struct bfa_itnim_s *itnim, u16 nsges)
{
struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
struct bfa_ioim_s *ioim;
/**
* alocate IOIM resource
*/
bfa_q_deq(&fcpim->ioim_free_q, &ioim);
if (!ioim) {
bfa_fcpim_stats(fcpim, no_iotags);
return NULL;
}
ioim->dio = dio;
ioim->itnim = itnim;
ioim->nsges = nsges;
ioim->nsgpgs = 0;
bfa_stats(fcpim, total_ios);
bfa_stats(itnim, ios);
fcpim->ios_active++;
list_add_tail(&ioim->qe, &itnim->io_q);
bfa_trc_fp(ioim->bfa, ioim->iotag);
return ioim;
}
void
bfa_ioim_free(struct bfa_ioim_s *ioim)
{
struct bfa_fcpim_mod_s *fcpim = ioim->fcpim;
bfa_trc_fp(ioim->bfa, ioim->iotag);
bfa_assert_fp(bfa_sm_cmp_state(ioim, bfa_ioim_sm_uninit));
bfa_assert_fp(list_empty(&ioim->sgpg_q)
|| (ioim->nsges > BFI_SGE_INLINE));
if (ioim->nsgpgs > 0)
bfa_sgpg_mfree(ioim->bfa, &ioim->sgpg_q, ioim->nsgpgs);
bfa_stats(ioim->itnim, io_comps);
fcpim->ios_active--;
list_del(&ioim->qe);
list_add_tail(&ioim->qe, &fcpim->ioim_free_q);
}
void
bfa_ioim_start(struct bfa_ioim_s *ioim)
{
bfa_trc_fp(ioim->bfa, ioim->iotag);
/**
* Obtain the queue over which this request has to be issued
*/
ioim->reqq = bfa_fcpim_ioredirect_enabled(ioim->bfa) ?
bfa_cb_ioim_get_reqq(ioim->dio) :
bfa_itnim_get_reqq(ioim);
bfa_sm_send_event(ioim, BFA_IOIM_SM_START);
}
/**
* Driver I/O abort request.
*/
void
bfa_ioim_abort(struct bfa_ioim_s *ioim)
{
bfa_trc(ioim->bfa, ioim->iotag);
bfa_fcpim_stats(ioim->fcpim, io_aborts);
bfa_sm_send_event(ioim, BFA_IOIM_SM_ABORT);
}
