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generated by cgit v1.2.3 (git 2.25.1) at 2025-12-17 16:49:24 +0000
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/*
 *  scsi_queue.c Copyright (C) 1997 Eric Youngdale
 *
 *  generic mid-level SCSI queueing.
 *
 *  The point of this is that we need to track when hosts are unable to
 *  accept a command because they are busy.  In addition, we track devices
 *  that cannot accept a command because of a QUEUE_FULL condition.  In both
 *  of these cases, we enter the command in the queue.  At some later point,
 *  we attempt to remove commands from the queue and retry them.
 */

#define __NO_VERSION__
#include <xeno/module.h>

#include <xeno/sched.h>
#include <xeno/timer.h>
/*  #include <xeno/string.h> */
/*  #include <xeno/slab.h> */
/*  #include <xeno/ioport.h> */
/*  #include <xeno/kernel.h> */
/*  #include <xeno/stat.h> */
#include <xeno/blk.h>
/*  #include <xeno/interrupt.h> */
/*  #include <xeno/delay.h> */
/*  #include <xeno/smp_lock.h> */

#define __KERNEL_SYSCALLS__

/*#include <xeno/unistd.h>*/

#include <asm/system.h>
#include <asm/irq.h>
#include <asm/dma.h>

#include "scsi.h"
#include "hosts.h"
#include "constants.h"

/*
 * TODO:
 *      1) Prevent multiple traversals of list to look for commands to
 *         queue.
 *      2) Protect against multiple insertions of list at the same time.
 * DONE:
 *      1) Set state of scsi command to a new state value for ml queue.
 *      2) Insert into queue when host rejects command.
 *      3) Make sure status code is properly passed from low-level queue func