229 lines
7.2 KiB
Diff
229 lines
7.2 KiB
Diff
Cc: James E.J. Bottomley <James.Bottomley@SteelEye.com>,
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linux-scsi@vger.kernel.org
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Subject: [PATCH] m68k: Atari SCSI revival
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From: Michael Schmitz <schmitz@opal.biophys.uni-duesseldorf.de>
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SCSI should be working on a TT (but someone should really try!) but causes
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trouble on a Falcon (as in: it ate a filesystem of mine) at least when
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used concurrently with IDE. I have the notion it's because locking of the
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ST-DMA interrupt by IDE is broken in 2.6 (the IDE driver always complains
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about trying to release an already-released ST-DMA). Needs more work, but
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that's on the IDE or m68k interrupt side rather than SCSI.
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Signed-off-by: Michael Schmitz <schmitz@debian.org>
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Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
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Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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---
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drivers/scsi/Kconfig | 2 -
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drivers/scsi/atari_NCR5380.c | 52 ++++++++++++++++++++++++++++++++++++++-----
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drivers/scsi/atari_scsi.c | 10 +++-----
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drivers/scsi/atari_scsi.h | 30 +++++++++++++++++++++---
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4 files changed, 77 insertions(+), 17 deletions(-)
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--- linux-m68k-2.6.21.orig/drivers/scsi/Kconfig
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+++ linux-m68k-2.6.21/drivers/scsi/Kconfig
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@@ -1649,7 +1649,7 @@ config OKTAGON_SCSI
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config ATARI_SCSI
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tristate "Atari native SCSI support"
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- depends on ATARI && SCSI && BROKEN
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+ depends on ATARI && SCSI
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select SCSI_SPI_ATTRS
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---help---
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If you have an Atari with built-in NCR5380 SCSI controller (TT,
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--- linux-m68k-2.6.21.orig/drivers/scsi/atari_NCR5380.c
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+++ linux-m68k-2.6.21/drivers/scsi/atari_NCR5380.c
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@@ -264,7 +264,7 @@ static struct scsi_host_template *the_te
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(struct NCR5380_hostdata *)(in)->hostdata
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#define HOSTDATA(in) ((struct NCR5380_hostdata *)(in)->hostdata)
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-#define NEXT(cmd) ((Scsi_Cmnd *)((cmd)->host_scribble))
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+#define NEXT(cmd) ((cmd)->host_scribble)
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#define NEXTADDR(cmd) ((Scsi_Cmnd **)&((cmd)->host_scribble))
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#define HOSTNO instance->host_no
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@@ -716,7 +716,7 @@ static void NCR5380_print_status (struct
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printk("NCR5380_print_status: no memory for print buffer\n");
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return;
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}
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- len = NCR5380_proc_info(pr_bfr, &start, 0, PAGE_SIZE, HOSTNO, 0);
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+ len = NCR5380_proc_info(instance, pr_bfr, &start, 0, PAGE_SIZE, 0);
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pr_bfr[len] = 0;
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printk("\n%s\n", pr_bfr);
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free_page((unsigned long) pr_bfr);
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@@ -878,6 +878,46 @@ static int NCR5380_init (struct Scsi_Hos
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}
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/*
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+ * our own old-style timeout update
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+ */
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+/*
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+ * The strategy is to cause the timer code to call scsi_times_out()
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+ * when the soonest timeout is pending.
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+ * The arguments are used when we are queueing a new command, because
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+ * we do not want to subtract the time used from this time, but when we
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+ * set the timer, we want to take this value into account.
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+ */
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+
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+int atari_scsi_update_timeout(Scsi_Cmnd * SCset, int timeout)
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+{
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+ int rtn;
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+
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+ /*
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+ * We are using the new error handling code to actually register/deregister
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+ * timers for timeout.
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+ */
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+
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+ if (!timer_pending(&SCset->eh_timeout)) {
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+ rtn = 0;
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+ } else {
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+ rtn = SCset->eh_timeout.expires - jiffies;
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+ }
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+
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+ if (timeout == 0) {
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+ del_timer(&SCset->eh_timeout);
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+ SCset->eh_timeout.data = (unsigned long) NULL;
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+ SCset->eh_timeout.expires = 0;
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+ } else {
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+ if (SCset->eh_timeout.data != (unsigned long) NULL)
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+ del_timer(&SCset->eh_timeout);
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+ SCset->eh_timeout.data = (unsigned long) SCset;
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+ SCset->eh_timeout.expires = jiffies + timeout;
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+ add_timer(&SCset->eh_timeout);
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+ }
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+ return rtn;
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+}
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+
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+/*
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* Function : int NCR5380_queue_command (Scsi_Cmnd *cmd,
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* void (*done)(Scsi_Cmnd *))
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*
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@@ -902,7 +942,7 @@ int NCR5380_queue_command (Scsi_Cmnd *cm
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Scsi_Cmnd *tmp;
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int oldto;
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unsigned long flags;
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- extern int update_timeout(Scsi_Cmnd * SCset, int timeout);
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+ // extern int update_timeout(Scsi_Cmnd * SCset, int timeout);
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#if (NDEBUG & NDEBUG_NO_WRITE)
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switch (cmd->cmnd[0]) {
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@@ -978,9 +1018,9 @@ int NCR5380_queue_command (Scsi_Cmnd *cm
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* alter queues and touch the lock.
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*/
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if (!IS_A_TT()) {
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- oldto = update_timeout(cmd, 0);
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+ oldto = atari_scsi_update_timeout(cmd, 0);
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falcon_get_lock();
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- update_timeout(cmd, oldto);
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+ atari_scsi_update_timeout(cmd, oldto);
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}
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if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
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LIST(cmd, hostdata->issue_queue);
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@@ -1435,7 +1475,7 @@ static int NCR5380_select (struct Scsi_H
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local_irq_restore(flags);
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/* Wait for arbitration logic to complete */
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-#if NCR_TIMEOUT
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+#if defined(NCR_TIMEOUT)
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{
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unsigned long timeout = jiffies + 2*NCR_TIMEOUT;
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--- linux-m68k-2.6.21.orig/drivers/scsi/atari_scsi.c
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+++ linux-m68k-2.6.21/drivers/scsi/atari_scsi.c
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@@ -395,7 +395,7 @@ static irqreturn_t scsi_tt_intr (int irq
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#endif /* REAL_DMA */
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- NCR5380_intr (0, 0, 0);
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+ NCR5380_intr(0, 0);
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#if 0
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/* To be sure the int is not masked */
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@@ -461,7 +461,7 @@ static irqreturn_t scsi_falcon_intr (int
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#endif /* REAL_DMA */
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- NCR5380_intr (0, 0, 0);
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+ NCR5380_intr(0, 0);
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return IRQ_HANDLED;
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}
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@@ -557,11 +557,11 @@ static void falcon_get_lock( void )
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local_irq_save(flags);
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- while( !in_interrupt() && falcon_got_lock && stdma_others_waiting() )
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+ while (!in_irq() && falcon_got_lock && stdma_others_waiting())
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sleep_on( &falcon_fairness_wait );
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while (!falcon_got_lock) {
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- if (in_interrupt())
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+ if (in_irq())
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panic( "Falcon SCSI hasn't ST-DMA lock in interrupt" );
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if (!falcon_trying_lock) {
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falcon_trying_lock = 1;
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@@ -763,7 +763,6 @@ int atari_scsi_detect (struct scsi_host_
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return( 1 );
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}
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-#ifdef MODULE
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int atari_scsi_release (struct Scsi_Host *sh)
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{
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if (IS_A_TT())
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@@ -772,7 +771,6 @@ int atari_scsi_release (struct Scsi_Host
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atari_stram_free (atari_dma_buffer);
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return 1;
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}
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-#endif
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void __init atari_scsi_setup(char *str, int *ints)
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{
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--- linux-m68k-2.6.21.orig/drivers/scsi/atari_scsi.h
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+++ linux-m68k-2.6.21/drivers/scsi/atari_scsi.h
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@@ -21,11 +21,7 @@
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int atari_scsi_detect (struct scsi_host_template *);
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const char *atari_scsi_info (struct Scsi_Host *);
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int atari_scsi_reset (Scsi_Cmnd *, unsigned int);
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-#ifdef MODULE
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int atari_scsi_release (struct Scsi_Host *);
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-#else
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-#define atari_scsi_release NULL
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-#endif
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/* The values for CMD_PER_LUN and CAN_QUEUE are somehow arbitrary. Higher
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* values should work, too; try it! (but cmd_per_lun costs memory!) */
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@@ -63,6 +59,32 @@ int atari_scsi_release (struct Scsi_Host
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#define NCR5380_dma_xfer_len(i,cmd,phase) \
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atari_dma_xfer_len(cmd->SCp.this_residual,cmd,((phase) & SR_IO) ? 0 : 1)
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+/* former generic SCSI error handling stuff */
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+
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+#define SCSI_ABORT_SNOOZE 0
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+#define SCSI_ABORT_SUCCESS 1
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+#define SCSI_ABORT_PENDING 2
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+#define SCSI_ABORT_BUSY 3
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+#define SCSI_ABORT_NOT_RUNNING 4
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+#define SCSI_ABORT_ERROR 5
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+
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+#define SCSI_RESET_SNOOZE 0
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+#define SCSI_RESET_PUNT 1
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+#define SCSI_RESET_SUCCESS 2
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+#define SCSI_RESET_PENDING 3
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+#define SCSI_RESET_WAKEUP 4
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+#define SCSI_RESET_NOT_RUNNING 5
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+#define SCSI_RESET_ERROR 6
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+
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+#define SCSI_RESET_SYNCHRONOUS 0x01
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+#define SCSI_RESET_ASYNCHRONOUS 0x02
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+#define SCSI_RESET_SUGGEST_BUS_RESET 0x04
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+#define SCSI_RESET_SUGGEST_HOST_RESET 0x08
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+
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+#define SCSI_RESET_BUS_RESET 0x100
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+#define SCSI_RESET_HOST_RESET 0x200
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+#define SCSI_RESET_ACTION 0xff
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+
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/* Debugging printk definitions:
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*
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* ARB -> arbitration
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