![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
352 lines
8.5 KiB
C
352 lines
8.5 KiB
C
/******************************************************************************
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* QLOGIC LINUX SOFTWARE
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*
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* QLogic ISP2x00 device driver for Linux 2.6.x
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* Copyright (C) 2003-2004 QLogic Corporation
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* (www.qlogic.com)
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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 as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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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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******************************************************************************/
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/* Management functions for various lists */
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/* __add_to_done_queue()
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*
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* Place SRB command on done queue.
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*
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* Input:
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* ha = host pointer
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* sp = srb pointer.
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* Locking:
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* this function assumes the ha->list_lock is already taken
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*/
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static inline void
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__add_to_done_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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/*
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if (sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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/* Place block on done queue */
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sp->cmd->host_scribble = (unsigned char *) NULL;
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sp->state = SRB_DONE_STATE;
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list_add_tail(&sp->list,&ha->done_queue);
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ha->done_q_cnt++;
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sp->ha = ha;
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}
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static inline void
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__add_to_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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/*
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if( sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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/* Place block on retry queue */
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list_add_tail(&sp->list,&ha->retry_queue);
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ha->retry_q_cnt++;
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sp->flags |= SRB_WATCHDOG;
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sp->state = SRB_RETRY_STATE;
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sp->ha = ha;
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}
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static inline void
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__add_to_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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/*
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if( sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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/* Place block on retry queue */
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list_add_tail(&sp->list,&ha->scsi_retry_queue);
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ha->scsi_retry_q_cnt++;
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sp->state = SRB_SCSI_RETRY_STATE;
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sp->ha = ha;
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}
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static inline void
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add_to_done_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__add_to_done_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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static inline void
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add_to_free_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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mempool_free(sp, ha->srb_mempool);
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}
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static inline void
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add_to_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__add_to_retry_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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static inline void
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add_to_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__add_to_scsi_retry_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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/*
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* __del_from_retry_queue
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* Function used to remove a command block from the
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* watchdog timer queue.
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*
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* Note: Must insure that command is on watchdog
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* list before calling del_from_retry_queue
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* if (sp->flags & SRB_WATCHDOG)
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*
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* Input:
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* ha = adapter block pointer.
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* sp = srb pointer.
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* Locking:
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* this function assumes the list_lock is already taken
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*/
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static inline void
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__del_from_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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list_del_init(&sp->list);
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sp->flags &= ~(SRB_WATCHDOG | SRB_BUSY);
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sp->state = SRB_NO_QUEUE_STATE;
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ha->retry_q_cnt--;
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}
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/*
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* __del_from_scsi_retry_queue
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* Function used to remove a command block from the
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* scsi retry queue.
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*
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* Input:
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* ha = adapter block pointer.
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* sp = srb pointer.
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* Locking:
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* this function assumes the list_lock is already taken
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*/
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static inline void
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__del_from_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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list_del_init(&sp->list);
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ha->scsi_retry_q_cnt--;
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sp->state = SRB_NO_QUEUE_STATE;
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}
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/*
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* del_from_retry_queue
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* Function used to remove a command block from the
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* watchdog timer queue.
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*
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* Note: Must insure that command is on watchdog
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* list before calling del_from_retry_queue
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* if (sp->flags & SRB_WATCHDOG)
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*
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* Input:
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* ha = adapter block pointer.
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* sp = srb pointer.
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* Locking:
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* this function takes and releases the list_lock
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*/
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static inline void
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del_from_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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/* if (unlikely(!(sp->flags & SRB_WATCHDOG)))
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BUG();*/
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spin_lock_irqsave(&ha->list_lock, flags);
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/* if (unlikely(list_empty(&ha->retry_queue)))
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BUG();*/
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__del_from_retry_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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/*
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* del_from_scsi_retry_queue
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* Function used to remove a command block from the
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* scsi retry queue.
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*
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* Input:
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* ha = adapter block pointer.
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* sp = srb pointer.
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* Locking:
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* this function takes and releases the list_lock
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*/
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static inline void
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del_from_scsi_retry_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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/* if (unlikely(list_empty(&ha->scsi_retry_queue)))
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BUG();*/
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__del_from_scsi_retry_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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/*
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* __add_to_pending_queue
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* Add the standard SCB job to the bottom of standard SCB commands.
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*
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* Input:
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* COMPLETE!!!
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* q = SCSI LU pointer.
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* sp = srb pointer.
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* SCSI_LU_Q lock must be already obtained.
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*/
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static inline int
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__add_to_pending_queue(struct scsi_qla_host *ha, srb_t * sp)
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{
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int empty;
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/*
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if( sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_FREE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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empty = list_empty(&ha->pending_queue);
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list_add_tail(&sp->list, &ha->pending_queue);
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ha->qthreads++;
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sp->state = SRB_PENDING_STATE;
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return (empty);
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}
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static inline void
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__add_to_pending_queue_head(struct scsi_qla_host *ha, srb_t * sp)
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{
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/*
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if( sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_FREE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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list_add(&sp->list, &ha->pending_queue);
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ha->qthreads++;
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sp->state = SRB_PENDING_STATE;
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}
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static inline int
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add_to_pending_queue(struct scsi_qla_host *ha, srb_t *sp)
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{
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int empty;
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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empty = __add_to_pending_queue(ha, sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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return (empty);
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}
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static inline void
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add_to_pending_queue_head(struct scsi_qla_host *ha, srb_t *sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__add_to_pending_queue_head(ha, sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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static inline void
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__del_from_pending_queue(struct scsi_qla_host *ha, srb_t *sp)
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{
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list_del_init(&sp->list);
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ha->qthreads--;
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sp->state = SRB_NO_QUEUE_STATE;
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}
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/*
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* Failover Stuff.
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*/
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static inline void
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__add_to_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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/*
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if( sp->state != SRB_NO_QUEUE_STATE &&
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sp->state != SRB_ACTIVE_STATE)
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BUG();
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*/
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list_add_tail(&sp->list,&ha->failover_queue);
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ha->failover_cnt++;
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sp->state = SRB_FAILOVER_STATE;
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sp->ha = ha;
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}
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static inline void add_to_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__add_to_failover_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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static inline void __del_from_failover_queue(struct scsi_qla_host * ha, srb_t *
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sp)
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{
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ha->failover_cnt--;
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list_del_init(&sp->list);
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sp->state = SRB_NO_QUEUE_STATE;
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}
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static inline void del_from_failover_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__del_from_failover_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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static inline void
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del_from_pending_queue(struct scsi_qla_host * ha, srb_t * sp)
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{
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unsigned long flags;
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spin_lock_irqsave(&ha->list_lock, flags);
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__del_from_pending_queue(ha,sp);
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spin_unlock_irqrestore(&ha->list_lock, flags);
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}
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