path: root/drivers/scsi/bfa/bfa_itnim.c

/*
 * 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 <bfa_fcpim.h>
#include "bfa_fcpim_priv.h"

BFA_TRC_FILE(HAL, ITNIM);

#define BFA_ITNIM_FROM_TAG(_fcpim, _tag)				\
	((_fcpim)->itnim_arr + ((_tag) & ((_fcpim)->num_itnims - 1)))

#define bfa_fcpim_additn(__itnim)					\
	list_add_tail(&(__itnim)->qe, &(__itnim)->fcpim->itnim_q)
#define bfa_fcpim_delitn(__itnim)	do {				\
	bfa_assert(bfa_q_is_on_q(&(__itnim)->fcpim->itnim_q, __itnim));      \
	list_del(&(__itnim)->qe);      \
	bfa_assert(list_empty(&(__itnim)->io_q));      \
	bfa_assert(list_empty(&(__itnim)->io_cleanup_q));      \
	bfa_assert(list_empty(&(__itnim)->pending_q));      \
} while (0)

#define bfa_itnim_online_cb(__itnim) do {				\
	if ((__itnim)->bfa->fcs)					\
		bfa_cb_itnim_online((__itnim)->ditn);      \
	else {								\
		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
		__bfa_cb_itnim_online, (__itnim));      \
	}								\
} while (0)

#define bfa_itnim_offline_cb(__itnim) do {				\
	if ((__itnim)->bfa->fcs)					\
		bfa_cb_itnim_offline((__itnim)->ditn);      \
	else {								\
		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
		__bfa_cb_itnim_offline, (__itnim));      \
	}								\
} while (0)

#define bfa_itnim_sler_cb(__itnim) do {					\
	if ((__itnim)->bfa->fcs)					\
		bfa_cb_itnim_sler((__itnim)->ditn);      \
	else {								\
		bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,	\
		__bfa_cb_itnim_sler, (__itnim));      \
	}								\
} while (0)

/*
 * forward declarations
 */
static void     bfa_itnim_iocdisable_cleanup(struct bfa_itnim_s *itnim);
static bfa_boolean_t bfa_itnim_send_fwcreate(struct bfa_itnim_s *itnim);
static bfa_boolean_t bfa_itnim_send_fwdelete(struct bfa_itnim_s *itnim);
static void     bfa_itnim_cleanp_comp(void *itnim_cbarg);
static void     bfa_itnim_cleanup(struct bfa_itnim_s *itnim);
static void     __bfa_cb_itnim_online(void *cbarg, bfa_boolean_t complete);
static void     __bfa_cb_itnim_offline(void *cbarg, bfa_boolean_t complete);
static void     __bfa_cb_itnim_sler(void *cbarg, bfa_boolean_t complete);
static void     bfa_itnim_iotov_online(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_cleanup(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov(void *itnim_arg);
static void     bfa_itnim_iotov_start(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_stop(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_delete(struct bfa_itnim_s *itnim);

/**
 *  bfa_itnim_sm BFA itnim state machine
 */


enum bfa_itnim_event {
	BFA_ITNIM_SM_CREATE = 1,	/*  itnim is created */
	BFA_ITNIM_SM_ONLINE = 2,	/*  itnim is online */
	BFA_ITNIM_SM_OFFLINE = 3,	/*  itnim is offline */
	BFA_ITNIM_SM_FWRSP = 4,		/*  firmware response */
	BFA_ITNIM_SM_DELETE = 5,	/*  deleting an existing itnim */
	BFA_ITNIM_SM_CLEANUP = 6,	/*  IO cleanup completion */
	BFA_ITNIM_SM_SLER = 7,		/*  second level error recovery */
	BFA_ITNIM_SM_HWFAIL = 8,	/*  IOC h/w failure event */
	BFA_ITNIM_SM_QRESUME = 9,	/*  queue space available */
};

static void     bfa_itnim_sm_uninit(struct bfa_itnim_s *itnim,
					enum bfa_itnim_event event);
static void     bfa_itnim_sm_created(struct bfa_itnim_s *itnim,
					 enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwcreate(struct bfa_itnim_s *itnim,
					  enum bfa_itnim_event event);
static void	bfa_itnim_sm_delete_pending(struct bfa_itnim_s *itnim,
				enum bfa_itnim_event event);
static void     bfa_itnim_sm_online(struct bfa_itnim_s *itnim,
					enum bfa_itnim_event event);
static void     bfa_itnim_sm_sler(struct bfa_itnim_s *itnim,
				      enum bfa_itnim_event event);
static void     bfa_itnim_sm_cleanup_offline(struct bfa_itnim_s *itnim,
						 enum bfa_itnim_event event);
static void     bfa_itnim_sm_cleanup_delete(struct bfa_itnim_s *itnim,
						enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwdelete(struct bfa_itnim_s *itnim,
					  enum bfa_itnim_event event);
static void     bfa_itnim_sm_offline(struct bfa_itnim_s *itnim,
					 enum bfa_itnim_event event);
static void     bfa_itnim_sm_iocdisable(struct bfa_itnim_s *itnim,
					    enum bfa_itnim_event event);
static void     bfa_itnim_sm_deleting(struct bfa_itnim_s *itnim,
					  enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwcreate_qfull(struct bfa_itnim_s *itnim,
					  enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwdelete_qfull(struct bfa_itnim_s *itnim,
					  enum bfa_itnim_event event);
static voi