691 lines
16 KiB
C
691 lines
16 KiB
C
/*
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* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <bfa.h>
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#include <bfa_cb_ioim_macros.h>
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BFA_TRC_FILE(HAL, TSKIM);
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/**
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* task management completion handling
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*/
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#define bfa_tskim_qcomp(__tskim, __cbfn) do { \
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bfa_cb_queue((__tskim)->bfa, &(__tskim)->hcb_qe, \
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__cbfn, (__tskim)); \
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bfa_tskim_notify_comp(__tskim); \
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} while (0)
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#define bfa_tskim_notify_comp(__tskim) do { \
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if ((__tskim)->notify) \
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bfa_itnim_tskdone((__tskim)->itnim); \
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} while (0)
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/*
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* forward declarations
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*/
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static void __bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete);
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static void __bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete);
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static bfa_boolean_t bfa_tskim_match_scope(struct bfa_tskim_s *tskim,
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lun_t lun);
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static void bfa_tskim_gather_ios(struct bfa_tskim_s *tskim);
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static void bfa_tskim_cleanp_comp(void *tskim_cbarg);
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static void bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim);
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static bfa_boolean_t bfa_tskim_send(struct bfa_tskim_s *tskim);
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static bfa_boolean_t bfa_tskim_send_abort(struct bfa_tskim_s *tskim);
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static void bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim);
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/**
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* bfa_tskim_sm
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*/
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enum bfa_tskim_event {
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BFA_TSKIM_SM_START = 1, /* TM command start */
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BFA_TSKIM_SM_DONE = 2, /* TM completion */
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BFA_TSKIM_SM_QRESUME = 3, /* resume after qfull */
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BFA_TSKIM_SM_HWFAIL = 5, /* IOC h/w failure event */
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BFA_TSKIM_SM_HCB = 6, /* BFA callback completion */
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BFA_TSKIM_SM_IOS_DONE = 7, /* IO and sub TM completions */
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BFA_TSKIM_SM_CLEANUP = 8, /* TM cleanup on ITN offline */
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BFA_TSKIM_SM_CLEANUP_DONE = 9, /* TM abort completion */
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};
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static void bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_active(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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static void bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event);
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/**
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* Task management command beginning state.
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*/
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static void
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bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_START:
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bfa_sm_set_state(tskim, bfa_tskim_sm_active);
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bfa_tskim_gather_ios(tskim);
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/**
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* If device is offline, do not send TM on wire. Just cleanup
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* any pending IO requests and complete TM request.
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*/
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if (!bfa_itnim_is_online(tskim->itnim)) {
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bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
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tskim->tsk_status = BFI_TSKIM_STS_OK;
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bfa_tskim_cleanup_ios(tskim);
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return;
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}
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if (!bfa_tskim_send(tskim)) {
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bfa_sm_set_state(tskim, bfa_tskim_sm_qfull);
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bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
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&tskim->reqq_wait);
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}
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* brief
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* TM command is active, awaiting completion from firmware to
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* cleanup IO requests in TM scope.
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*/
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static void
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bfa_tskim_sm_active(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_DONE:
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bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
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bfa_tskim_cleanup_ios(tskim);
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break;
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case BFA_TSKIM_SM_CLEANUP:
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bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
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if (!bfa_tskim_send_abort(tskim)) {
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bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup_qfull);
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bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
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&tskim->reqq_wait);
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}
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break;
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case BFA_TSKIM_SM_HWFAIL:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_tskim_iocdisable_ios(tskim);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* An active TM is being cleaned up since ITN is offline. Awaiting cleanup
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* completion event from firmware.
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*/
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static void
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bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_DONE:
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/**
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* Ignore and wait for ABORT completion from firmware.
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*/
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break;
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case BFA_TSKIM_SM_CLEANUP_DONE:
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bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
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bfa_tskim_cleanup_ios(tskim);
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break;
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case BFA_TSKIM_SM_HWFAIL:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_tskim_iocdisable_ios(tskim);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
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break;
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default:
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bfa_assert(0);
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}
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}
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static void
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bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_IOS_DONE:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_done);
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break;
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case BFA_TSKIM_SM_CLEANUP:
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/**
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* Ignore, TM command completed on wire.
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* Notify TM conmpletion on IO cleanup completion.
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*/
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break;
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case BFA_TSKIM_SM_HWFAIL:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_tskim_iocdisable_ios(tskim);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* Task management command is waiting for room in request CQ
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*/
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static void
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bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_QRESUME:
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bfa_sm_set_state(tskim, bfa_tskim_sm_active);
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bfa_tskim_send(tskim);
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break;
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case BFA_TSKIM_SM_CLEANUP:
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/**
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* No need to send TM on wire since ITN is offline.
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*/
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bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
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bfa_reqq_wcancel(&tskim->reqq_wait);
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bfa_tskim_cleanup_ios(tskim);
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break;
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case BFA_TSKIM_SM_HWFAIL:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_reqq_wcancel(&tskim->reqq_wait);
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bfa_tskim_iocdisable_ios(tskim);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* Task management command is active, awaiting for room in request CQ
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* to send clean up request.
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*/
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static void
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bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
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enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_DONE:
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bfa_reqq_wcancel(&tskim->reqq_wait);
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/**
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*
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* Fall through !!!
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*/
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case BFA_TSKIM_SM_QRESUME:
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bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
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bfa_tskim_send_abort(tskim);
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break;
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case BFA_TSKIM_SM_HWFAIL:
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bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
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bfa_reqq_wcancel(&tskim->reqq_wait);
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bfa_tskim_iocdisable_ios(tskim);
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bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* BFA callback is pending
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*/
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static void
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bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
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{
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bfa_trc(tskim->bfa, event);
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switch (event) {
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case BFA_TSKIM_SM_HCB:
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bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);
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bfa_tskim_free(tskim);
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break;
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case BFA_TSKIM_SM_CLEANUP:
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bfa_tskim_notify_comp(tskim);
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break;
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case BFA_TSKIM_SM_HWFAIL:
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break;
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default:
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bfa_assert(0);
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}
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}
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/**
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* bfa_tskim_private
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*/
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static void
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__bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete)
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{
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struct bfa_tskim_s *tskim = cbarg;
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if (!complete) {
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bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
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return;
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}
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bfa_stats(tskim->itnim, tm_success);
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bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk, tskim->tsk_status);
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}
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static void
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__bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete)
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{
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struct bfa_tskim_s *tskim = cbarg;
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if (!complete) {
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bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
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return;
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}
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bfa_stats(tskim->itnim, tm_failures);
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bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk,
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BFI_TSKIM_STS_FAILED);
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}
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static bfa_boolean_t
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bfa_tskim_match_scope(struct bfa_tskim_s *tskim, lun_t lun)
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{
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switch (tskim->tm_cmnd) {
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case FCP_TM_TARGET_RESET:
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return BFA_TRUE;
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case FCP_TM_ABORT_TASK_SET:
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case FCP_TM_CLEAR_TASK_SET:
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case FCP_TM_LUN_RESET:
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case FCP_TM_CLEAR_ACA:
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return (tskim->lun == lun);
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default:
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bfa_assert(0);
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}
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return BFA_FALSE;
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}
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/**
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* Gather affected IO requests and task management commands.
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*/
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static void
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bfa_tskim_gather_ios(struct bfa_tskim_s *tskim)
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{
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struct bfa_itnim_s *itnim = tskim->itnim;
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struct bfa_ioim_s *ioim;
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struct list_head *qe, *qen;
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INIT_LIST_HEAD(&tskim->io_q);
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/**
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* Gather any active IO requests first.
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*/
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list_for_each_safe(qe, qen, &itnim->io_q) {
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ioim = (struct bfa_ioim_s *) qe;
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if (bfa_tskim_match_scope
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(tskim, bfa_cb_ioim_get_lun(ioim->dio))) {
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list_del(&ioim->qe);
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list_add_tail(&ioim->qe, &tskim->io_q);
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}
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}
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/**
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* Failback any pending IO requests immediately.
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*/
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list_for_each_safe(qe, qen, &itnim->pending_q) {
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ioim = (struct bfa_ioim_s *) qe;
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if (bfa_tskim_match_scope
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(tskim, bfa_cb_ioim_get_lun(ioim->dio))) {
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list_del(&ioim->qe);
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list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
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bfa_ioim_tov(ioim);
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}
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}
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}
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/**
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* IO cleanup completion
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*/
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static void
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bfa_tskim_cleanp_comp(void *tskim_cbarg)
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{
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struct bfa_tskim_s *tskim = tskim_cbarg;
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bfa_stats(tskim->itnim, tm_io_comps);
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bfa_sm_send_event(tskim, BFA_TSKIM_SM_IOS_DONE);
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}
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/**
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* Gather affected IO requests and task management commands.
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*/
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static void
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bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim)
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{
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struct bfa_ioim_s *ioim;
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struct list_head *qe, *qen;
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bfa_wc_init(&tskim->wc, bfa_tskim_cleanp_comp, tskim);
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list_for_each_safe(qe, qen, &tskim->io_q) {
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ioim = (struct bfa_ioim_s *) qe;
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bfa_wc_up(&tskim->wc);
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bfa_ioim_cleanup_tm(ioim, tskim);
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}
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bfa_wc_wait(&tskim->wc);
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}
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/**
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* Send task management request to firmware.
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*/
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static bfa_boolean_t
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bfa_tskim_send(struct bfa_tskim_s *tskim)
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{
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struct bfa_itnim_s *itnim = tskim->itnim;
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struct bfi_tskim_req_s *m;
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/**
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* check for room in queue to send request now
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*/
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m = bfa_reqq_next(tskim->bfa, itnim->reqq);
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if (!m)
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return BFA_FALSE;
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/**
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* build i/o request message next
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*/
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bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_TM_REQ,
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bfa_lpuid(tskim->bfa));
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m->tsk_tag = bfa_os_htons(tskim->tsk_tag);
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m->itn_fhdl = tskim->itnim->rport->fw_handle;
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m->t_secs = tskim->tsecs;
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m->lun = tskim->lun;
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m->tm_flags = tskim->tm_cmnd;
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/**
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* queue I/O message to firmware
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*/
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bfa_reqq_produce(tskim->bfa, itnim->reqq);
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return BFA_TRUE;
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}
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/**
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* Send abort request to cleanup an active TM to firmware.
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*/
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static bfa_boolean_t
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bfa_tskim_send_abort(struct bfa_tskim_s *tskim)
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{
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struct bfa_itnim_s *itnim = tskim->itnim;
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struct bfi_tskim_abortreq_s *m;
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/**
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* check for room in queue to send request now
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*/
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m = bfa_reqq_next(tskim->bfa, itnim->reqq);
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if (!m)
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return BFA_FALSE;
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/**
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* build i/o request message next
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*/
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bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_ABORT_REQ,
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bfa_lpuid(tskim->bfa));
|
|
|
|
m->tsk_tag = bfa_os_htons(tskim->tsk_tag);
|
|
|
|
/**
|
|
* queue I/O message to firmware
|
|
*/
|
|
bfa_reqq_produce(tskim->bfa, itnim->reqq);
|
|
return BFA_TRUE;
|
|
}
|
|
|
|
/**
|
|
* Call to resume task management cmnd waiting for room in request queue.
|
|
*/
|
|
static void
|
|
bfa_tskim_qresume(void *cbarg)
|
|
{
|
|
struct bfa_tskim_s *tskim = cbarg;
|
|
|
|
bfa_fcpim_stats(tskim->fcpim, qresumes);
|
|
bfa_stats(tskim->itnim, tm_qresumes);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_QRESUME);
|
|
}
|
|
|
|
/**
|
|
* Cleanup IOs associated with a task mangement command on IOC failures.
|
|
*/
|
|
static void
|
|
bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim)
|
|
{
|
|
struct bfa_ioim_s *ioim;
|
|
struct list_head *qe, *qen;
|
|
|
|
list_for_each_safe(qe, qen, &tskim->io_q) {
|
|
ioim = (struct bfa_ioim_s *) qe;
|
|
bfa_ioim_iocdisable(ioim);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* bfa_tskim_friend
|
|
*/
|
|
|
|
/**
|
|
* Notification on completions from related ioim.
|
|
*/
|
|
void
|
|
bfa_tskim_iodone(struct bfa_tskim_s *tskim)
|
|
{
|
|
bfa_wc_down(&tskim->wc);
|
|
}
|
|
|
|
/**
|
|
* Handle IOC h/w failure notification from itnim.
|
|
*/
|
|
void
|
|
bfa_tskim_iocdisable(struct bfa_tskim_s *tskim)
|
|
{
|
|
tskim->notify = BFA_FALSE;
|
|
bfa_stats(tskim->itnim, tm_iocdowns);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_HWFAIL);
|
|
}
|
|
|
|
/**
|
|
* Cleanup TM command and associated IOs as part of ITNIM offline.
|
|
*/
|
|
void
|
|
bfa_tskim_cleanup(struct bfa_tskim_s *tskim)
|
|
{
|
|
tskim->notify = BFA_TRUE;
|
|
bfa_stats(tskim->itnim, tm_cleanups);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP);
|
|
}
|
|
|
|
/**
|
|
* Memory allocation and initialization.
|
|
*/
|
|
void
|
|
bfa_tskim_attach(struct bfa_fcpim_mod_s *fcpim, struct bfa_meminfo_s *minfo)
|
|
{
|
|
struct bfa_tskim_s *tskim;
|
|
u16 i;
|
|
|
|
INIT_LIST_HEAD(&fcpim->tskim_free_q);
|
|
|
|
tskim = (struct bfa_tskim_s *) bfa_meminfo_kva(minfo);
|
|
fcpim->tskim_arr = tskim;
|
|
|
|
for (i = 0; i < fcpim->num_tskim_reqs; i++, tskim++) {
|
|
/*
|
|
* initialize TSKIM
|
|
*/
|
|
bfa_os_memset(tskim, 0, sizeof(struct bfa_tskim_s));
|
|
tskim->tsk_tag = i;
|
|
tskim->bfa = fcpim->bfa;
|
|
tskim->fcpim = fcpim;
|
|
tskim->notify = BFA_FALSE;
|
|
bfa_reqq_winit(&tskim->reqq_wait, bfa_tskim_qresume,
|
|
tskim);
|
|
bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);
|
|
|
|
list_add_tail(&tskim->qe, &fcpim->tskim_free_q);
|
|
}
|
|
|
|
bfa_meminfo_kva(minfo) = (u8 *) tskim;
|
|
}
|
|
|
|
void
|
|
bfa_tskim_detach(struct bfa_fcpim_mod_s *fcpim)
|
|
{
|
|
/**
|
|
* @todo
|
|
*/
|
|
}
|
|
|
|
void
|
|
bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
|
|
{
|
|
struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
|
|
struct bfi_tskim_rsp_s *rsp = (struct bfi_tskim_rsp_s *) m;
|
|
struct bfa_tskim_s *tskim;
|
|
u16 tsk_tag = bfa_os_ntohs(rsp->tsk_tag);
|
|
|
|
tskim = BFA_TSKIM_FROM_TAG(fcpim, tsk_tag);
|
|
bfa_assert(tskim->tsk_tag == tsk_tag);
|
|
|
|
tskim->tsk_status = rsp->tsk_status;
|
|
|
|
/**
|
|
* Firmware sends BFI_TSKIM_STS_ABORTED status for abort
|
|
* requests. All other statuses are for normal completions.
|
|
*/
|
|
if (rsp->tsk_status == BFI_TSKIM_STS_ABORTED) {
|
|
bfa_stats(tskim->itnim, tm_cleanup_comps);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP_DONE);
|
|
} else {
|
|
bfa_stats(tskim->itnim, tm_fw_rsps);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_DONE);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* bfa_tskim_api
|
|
*/
|
|
|
|
|
|
struct bfa_tskim_s *
|
|
bfa_tskim_alloc(struct bfa_s *bfa, struct bfad_tskim_s *dtsk)
|
|
{
|
|
struct bfa_fcpim_mod_s *fcpim = BFA_FCPIM_MOD(bfa);
|
|
struct bfa_tskim_s *tskim;
|
|
|
|
bfa_q_deq(&fcpim->tskim_free_q, &tskim);
|
|
|
|
if (!tskim)
|
|
bfa_fcpim_stats(fcpim, no_tskims);
|
|
else
|
|
tskim->dtsk = dtsk;
|
|
|
|
return tskim;
|
|
}
|
|
|
|
void
|
|
bfa_tskim_free(struct bfa_tskim_s *tskim)
|
|
{
|
|
bfa_assert(bfa_q_is_on_q_func(&tskim->itnim->tsk_q, &tskim->qe));
|
|
list_del(&tskim->qe);
|
|
list_add_tail(&tskim->qe, &tskim->fcpim->tskim_free_q);
|
|
}
|
|
|
|
/**
|
|
* Start a task management command.
|
|
*
|
|
* @param[in] tskim BFA task management command instance
|
|
* @param[in] itnim i-t nexus for the task management command
|
|
* @param[in] lun lun, if applicable
|
|
* @param[in] tm_cmnd Task management command code.
|
|
* @param[in] t_secs Timeout in seconds
|
|
*
|
|
* @return None.
|
|
*/
|
|
void
|
|
bfa_tskim_start(struct bfa_tskim_s *tskim, struct bfa_itnim_s *itnim, lun_t lun,
|
|
enum fcp_tm_cmnd tm_cmnd, u8 tsecs)
|
|
{
|
|
tskim->itnim = itnim;
|
|
tskim->lun = lun;
|
|
tskim->tm_cmnd = tm_cmnd;
|
|
tskim->tsecs = tsecs;
|
|
tskim->notify = BFA_FALSE;
|
|
bfa_stats(itnim, tm_cmnds);
|
|
|
|
list_add_tail(&tskim->qe, &itnim->tsk_q);
|
|
bfa_sm_send_event(tskim, BFA_TSKIM_SM_START);
|
|
}
|
|
|
|
|