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freebsd/sys/i386/scsi/aic7xxx.c
Justin T. Gibbs a30f48f020 Add support to the host driver for "downloaded constants". These are immediate 
operands that are set during seqeuncer program download instead of at
assembly time.

Remove the REJBYTE sram variable.  The host driver can just as easly
read the accumulator to get this value.

This should fix the reported problems with cards that don't have devices
attached to them failing with a stream of "Somone reset bus X" messages.

Doug Ledford determined the cause of the problem, fixes by me.
1997-09-27 19:38:27 +00:00

3868 lines
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/*
* Generic driver for the aic7xxx based adaptec SCSI controllers
* Product specific probe and attach routines can be found in:
* i386/eisa/aic7770.c 27/284X and aic7770 motherboard controllers
* pci/aic7870.c 3940, 2940, aic7880, aic7870, aic7860,
* and aic7850 controllers
*
* Copyright (c) 1994-1997 Justin Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Where this Software is combined with software released under the terms of
* the GNU Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7xxx.c,v 1.125 1997/09/21 21:43:52 gibbs Exp $
*/
/*
* TODO:
* Implement Target Mode
*
* A few notes on features of the driver.
*
* SCB paging takes advantage of the fact that devices stay disconnected
* from the bus a relatively long time and that while they're disconnected,
* having the SCBs for these transactions down on the host adapter is of
* little use. Instead of leaving this idle SCB down on the card we copy
* it back up into kernel memory and reuse the SCB slot on the card to
* schedule another transaction. This can be a real payoff when doing random
* I/O to tagged queueing devices since there are more transactions active at
* once for the device to sort for optimal seek reduction. The algorithm goes
* like this...
*
* The sequencer maintains two lists of its hardware SCBs. The first is the
* singly linked free list which tracks all SCBs that are not currently in
* use. The second is the doubly linked disconnected list which holds the
* SCBs of transactions that are in the disconnected state sorted most
* recently disconnected first. When the kernel queues a transaction to
* the card, a hardware SCB to "house" this transaction is retrieved from
* either of these two lists. If the SCB came from the disconnected list,
* a check is made to see if any data transfer or SCB linking (more on linking
* in a bit) information has been changed since it was copied from the host
* and if so, DMAs the SCB back up before it can be used. Once a hardware
* SCB has been obtained, the SCB is DMAed from the host. Before any work
* can begin on this SCB, the sequencer must ensure that either the SCB is
* for a tagged transaction or the target is not already working on another
* non-tagged transaction. If a conflict arises in the non-tagged case, the
* sequencer finds the SCB for the active transactions and sets the SCB_LINKED
* field in that SCB to this next SCB to execute. To facilitate finding
* active non-tagged SCBs, the last four bytes of up to the first four hardware
* SCBs serve as a storage area for the currently active SCB ID for each
* target.
*
* When a device reconnects, a search is made of the hardware SCBs to find
* the SCB for this transaction. If the search fails, a hardware SCB is
* pulled from either the free or disconnected SCB list and the proper
* SCB is DMAed from the host. If the SCB_ABORTED control bit is set
* in the control byte of the SCB while it was disconnected, the sequencer
* will send an abort or abort tag message to the target during the
* reconnection and signal the kernel that the abort was successfull.
*
* When a command completes, a check for non-zero status and residuals is
* made. If either of these conditions exists, the SCB is DMAed back up to
* the host so that it can interpret this information. Additionally, in the
* case of bad status, the sequencer generates a special interrupt and pauses
* itself. This allows the host to setup a request sense command if it
* chooses for this target synchronously with the error so that sense
* information isn't lost.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#if defined(__NetBSD__)
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#endif /* defined(__NetBSD__) */
#include <sys/malloc.h>
#include <sys/buf.h>
#include <scsi/scsi_message.h>
#if defined(__NetBSD__)
#include <scsi/scsi_debug.h>
#endif
#include <scsi/scsiconf.h>
#include <scsi/scsi_debug.h>
#if defined(__FreeBSD__)
#include <machine/clock.h>
#endif
#include <vm/vm.h>
#include <vm/pmap.h>
#if defined(__FreeBSD__)
#include <i386/scsi/aic7xxx.h>
#include <dev/aic7xxx/sequencer.h>
#include <aic7xxx_reg.h>
#include <aic7xxx_seq.h>
#endif /* defined(__FreeBSD__) */
#if defined(__NetBSD__)
#include <dev/ic/aic7xxxreg.h>
#include <dev/ic/aic7xxxvar.h>
#define bootverbose 1
#if DEBUGTARGET < 0 /* Negative numbers for disabling cause warnings */
#define DEBUGTARGET 17
#endif
#endif /* defined(__NetBSD__) */
#include <sys/kernel.h>
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#define ALL_TARGETS -1
#define ALL_LUNS -1
#define ALL_CHANNELS '\0'
#if defined(__FreeBSD__)
u_long ahc_unit = 0;
#endif
#ifdef AHC_DEBUG
static int ahc_debug = AHC_DEBUG;
#endif
#ifdef AHC_BROKEN_CACHE
int ahc_broken_cache = 1;
/*
* "wbinvd" cause writing back whole cache (both CPU internal & external)
* to memory, so that the instruction takes a lot of time.
* This makes machine slow.
*/
#define INVALIDATE_CACHE() __asm __volatile("wbinvd")
#endif
/**** bit definitions for SCSIDEF ****/
#define HSCSIID 0x07 /* our SCSI ID */
#define HWSCSIID 0x0f /* our SCSI ID if Wide Bus */
static void ahcminphys __P((struct buf *bp));
static int32_t ahc_scsi_cmd __P((struct scsi_xfer *xs));
static void ahc_run_waiting_queue __P((struct ahc_softc *ahc));
static struct scb *
ahc_get_scb __P((struct ahc_softc *ahc, u_int32_t flags));
static void ahc_free_scb __P((struct ahc_softc *ahc, struct scb *scb));
static struct scb *
ahc_alloc_scb __P((struct ahc_softc *ahc));
static inline void pause_sequencer __P((struct ahc_softc *ahc));
static inline void unpause_sequencer __P((struct ahc_softc *ahc,
int unpause_always));
static inline void restart_sequencer __P((struct ahc_softc *ahc));
#define AHC_BUSRESET_DELAY 1000 /* Reset delay in us */
static struct scsi_adapter ahc_switch =
{
ahc_scsi_cmd,
ahcminphys,
NULL,
NULL,
#if defined(__FreeBSD__)
NULL,
"ahc",
{ 0, 0 }
#endif
};
static struct scsi_device ahc_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
#if defined(__FreeBSD__)
"ahc",
0,
{ 0, 0 }
#endif
};
static inline void
pause_sequencer(ahc)
struct ahc_softc *ahc;
{
ahc_outb(ahc, HCNTRL, ahc->pause);
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
*/
while ((ahc_inb(ahc, HCNTRL) & PAUSE) == 0)
;
}
static inline void
unpause_sequencer(ahc, unpause_always)
struct ahc_softc *ahc;
int unpause_always;
{
if (unpause_always
|| (ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0)
ahc_outb(ahc, HCNTRL, ahc->unpause);
}
/*
* Restart the sequencer program from address zero
*/
static inline void
restart_sequencer(ahc)
struct ahc_softc *ahc;
{
pause_sequencer(ahc);
ahc_outb(ahc, SEQCTL, SEQRESET|FASTMODE);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
}
#if defined(__FreeBSD__)
#define IS_SCSIBUS_B(ahc, sc_link) \
(((u_int32_t)((sc_link)->fordriver) & SELBUSB) != 0)
#else /* NetBSD/OpenBSD */
#define IS_SCSIBUS_B(ahc, sc_link) \
((sc_link)->scsibus == (ahc)->sc_link_b.scsibus)
#endif
#define SCB_TARGET(scb) \
(((scb)->hscb->tcl & TID) >> 4)
#define SCB_LUN(scb) \
((scb)->hscb->tcl & LID)
#define SCB_IS_SCSIBUS_B(scb) \
(((scb)->hscb->tcl & SELBUSB) != 0)
static u_int8_t ahc_abort_wscb __P((struct ahc_softc *ahc, struct scb *scbp,
u_int8_t scbpos, u_int8_t prev,
u_int32_t xs_error));
static void ahc_done __P((struct ahc_softc *ahc, struct scb *scbp));
static void ahc_handle_seqint __P((struct ahc_softc *ahc, u_int8_t intstat));
static void ahc_handle_scsiint __P((struct ahc_softc *ahc,
u_int8_t intstat));
static void ahc_handle_devreset __P((struct ahc_softc *ahc,
int target, char channel));
static void ahc_loadseq __P((struct ahc_softc *ahc));
static struct patch *
ahc_next_patch __P((struct patch *cur_patch, int options,
int instrptr));
static void ahc_download_instr(struct ahc_softc *ahc, int options,
int instrptr, u_int8_t *dconsts);
static int ahc_match_scb __P((struct scb *scb, int target, char channel,
int lun, u_int8_t tag));
static int ahc_poll __P((struct ahc_softc *ahc, int wait));
#ifdef AHC_DEBUG
static void ahc_print_scb __P((struct scb *scb));
#endif
static u_int8_t ahc_find_scb __P((struct ahc_softc *ahc, struct scb *scb));
static int ahc_search_qinfifo __P((struct ahc_softc *ahc, int target,
char channel, int lun, u_int8_t tag,
u_int32_t flags, u_int32_t xs_error,
int requeue));
static int ahc_reset_channel __P((struct ahc_softc *ahc, char channel,
u_int32_t xs_error, int initiate_reset));
static int ahc_reset_device __P((struct ahc_softc *ahc, int target,
char channel, int lun, u_int8_t tag,
u_int32_t xs_error));
static u_int8_t ahc_rem_scb_from_disc_list __P((struct ahc_softc *ahc,
u_int8_t scbptr));
static void ahc_add_curscb_to_free_list __P((struct ahc_softc *ahc));
static void ahc_clear_intstat __P((struct ahc_softc *ahc));
static void ahc_reset_current_bus __P((struct ahc_softc *ahc));
static void ahc_run_done_queue __P((struct ahc_softc *ahc));
static void ahc_untimeout_done_queue __P((struct ahc_softc *ahc));
static void ahc_scsirate __P((struct ahc_softc* ahc, u_int8_t *scsirate,
u_int8_t *period, u_int8_t *offset,
char channel, int target));
#if defined(__FreeBSD__)
static timeout_t
ahc_timeout;
#elif defined(__NetBSD__)
static void ahc_timeout __P((void *));
#endif
static u_int8_t ahc_index_busy_target __P((struct ahc_softc *ahc, int target,
char channel, int unbusy));
static void ahc_busy_target __P((struct ahc_softc *ahc, int target,
char channel, u_int8_t scbid));
static void ahc_construct_sdtr __P((struct ahc_softc *ahc, int start_byte,
u_int8_t period, u_int8_t offset));
static void ahc_construct_wdtr __P((struct ahc_softc *ahc, int start_byte,
u_int8_t bus_width));
static void ahc_calc_residual __P((struct scb *scb));
#if defined(__FreeBSD__)
char *ahc_name(ahc)
struct ahc_softc *ahc;
{
static char name[10];
sprintf(name, "ahc%d", ahc->unit);
return (name);
}
#elif defined(__NetBSD__)
struct cfdriver ahc_cd = {
NULL, "ahc", DV_DULL
};
#endif
#ifdef AHC_DEBUG
static void
ahc_print_scb(scb)
struct scb *scb;
{
struct hardware_scb *hscb = scb->hscb;
printf("scb:%p control:0x%x tcl:0x%x cmdlen:%d cmdpointer:0x%lx\n",
scb,
hscb->control,
hscb->tcl,
hscb->cmdlen,
hscb->cmdpointer );
printf(" datlen:%d data:0x%lx segs:0x%x segp:0x%lx\n",
hscb->datalen,
hscb->data,
hscb->SG_segment_count,
hscb->SG_list_pointer);
printf(" sg_addr:%lx sg_len:%ld\n",
hscb->ahc_dma[0].addr,
hscb->ahc_dma[0].len);
}
#endif
static struct {
u_int8_t errno;
char *errmesg;
} hard_error[] = {
{ ILLHADDR, "Illegal Host Access" },
{ ILLSADDR, "Illegal Sequencer Address referrenced" },
{ ILLOPCODE, "Illegal Opcode in sequencer program" },
{ PARERR, "Sequencer Ram Parity Error" }
};
/*
* Valid SCSIRATE values. (p. 3-17)
* Provides a mapping of tranfer periods in ns to the proper value to
* stick in the scsiscfr reg to use that transfer rate.
*/
static struct {
int sxfr;
/* Rates in Ultra mode have bit 8 of sxfr set */
#define ULTRA_SXFR 0x100
u_int8_t period; /* Period to send to SCSI target */
char *rate;
} ahc_syncrates[] = {
{ 0x100, 12, "20.0" },
{ 0x110, 15, "16.0" },
{ 0x120, 18, "13.4" },
{ 0x000, 25, "10.0" },
{ 0x010, 31, "8.0" },
{ 0x020, 37, "6.67" },
{ 0x030, 43, "5.7" },
{ 0x040, 50, "5.0" },
{ 0x050, 56, "4.4" },
{ 0x060, 62, "4.0" },
{ 0x070, 68, "3.6" }
};
static int ahc_num_syncrates =
sizeof(ahc_syncrates) / sizeof(ahc_syncrates[0]);
/*
* Allocate a controller structure for a new device and initialize it.
*/
#if defined(__FreeBSD__)
struct ahc_softc *
ahc_alloc(unit, iobase, maddr, type, flags, scb_data)
int unit;
u_int32_t iobase;
#elif defined(__NetBSD__)
void
ahc_construct(ahc, bc, ioh, maddr, type, flags)
struct ahc_softc *ahc;
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
#endif
vm_offset_t maddr;
ahc_type type;
ahc_flag flags;
struct scb_data *scb_data;
{
/*
* find unit and check we have that many defined
*/
#if defined(__FreeBSD__)
struct ahc_softc *ahc;
size_t alloc_size;
/*
* Allocate a storage area for us
*/
if (scb_data == NULL)
/*
* We are not sharing SCB space with another controller
* so allocate our own SCB data space.
*/
alloc_size = sizeof(struct full_ahc_softc);
else
alloc_size = sizeof(struct ahc_softc);
ahc = malloc(alloc_size, M_DEVBUF, M_NOWAIT);
if (!ahc) {
printf("ahc%d: cannot malloc!\n", unit);
return NULL;
}
bzero(ahc, alloc_size);
#endif
if (scb_data == NULL) {
struct full_ahc_softc* full_softc = (struct full_ahc_softc*)ahc;
ahc->scb_data = &full_softc->scb_data_storage;
STAILQ_INIT(&ahc->scb_data->free_scbs);
} else
ahc->scb_data = scb_data;
STAILQ_INIT(&ahc->waiting_scbs);
STAILQ_INIT(&ahc->cmplete_scbs);
#if defined(__FreeBSD__)
ahc->unit = unit;
#endif
#if defined(__FreeBSD__)
ahc->baseport = iobase;
#elif defined(__NetBSD__)
ahc->sc_bc = bc;
ahc->sc_ioh = ioh;
#endif
ahc->maddr = (volatile u_int8_t *)maddr;
ahc->type = type;
ahc->flags = flags;
ahc->unpause = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN;
ahc->pause = ahc->unpause | PAUSE;
#if defined(__FreeBSD__)
return (ahc);
#endif
}
void
ahc_free(ahc)
struct ahc_softc *ahc;
{
#if defined(__FreeBSD__)
free(ahc, M_DEVBUF);
return;
#endif
}
void
ahc_reset(ahc)
struct ahc_softc *ahc;
{
u_int8_t hcntrl;
int wait;
/* Retain the IRQ type accross the chip reset */
hcntrl = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN;
ahc_outb(ahc, HCNTRL, CHIPRST | PAUSE);
/*
* Ensure that the reset has finished
*/
wait = 1000;
while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK))
DELAY(1000);
if (wait == 0) {
printf("%s: WARNING - Failed chip reset! "
"Trying to initialize anyway.\n", ahc_name(ahc));
}
ahc_outb(ahc, HCNTRL, hcntrl | PAUSE);
}
/*
* Look up the valid period to SCSIRATE conversion in our table.
*/
static void
ahc_scsirate(ahc, scsirate, period, offset, channel, target )
struct ahc_softc *ahc;
u_int8_t *scsirate;
u_int8_t *period;
u_int8_t *offset;
char channel;
int target;
{
int i;
u_int32_t ultra_enb_addr;
u_int8_t sxfrctl0;
u_int8_t ultra_enb;
i = ahc_num_syncrates; /* Default to async */
if (*period >= ahc_syncrates[0].period && *offset != 0) {
for (i = 0; i < ahc_num_syncrates; i++) {
if (*period <= ahc_syncrates[i].period) {
/*
* Watch out for Ultra speeds when ultra is not
* enabled and vice-versa.
*/
if (!(ahc->type & AHC_ULTRA)
&& (ahc_syncrates[i].sxfr & ULTRA_SXFR)) {
/*
* This should only happen if the
* drive is the first to negotiate
* and chooses a high rate. We'll
* just move down the table util
* we hit a non ultra speed.
*/
continue;
}
*scsirate = (ahc_syncrates[i].sxfr & 0xF0)
| (*offset & 0x0f);
*period = ahc_syncrates[i].period;
if (bootverbose) {
printf("%s: target %d synchronous at "
"%sMHz, offset = 0x%x\n",
ahc_name(ahc), target,
ahc_syncrates[i].rate, *offset );
}
break;
}
}
}
if (i >= ahc_num_syncrates) {
/* Use asynchronous transfers. */
*scsirate = 0;
*period = 0;
*offset = 0;
if (bootverbose)
printf("%s: target %d using asynchronous transfers\n",
ahc_name(ahc), target );
}
/*
* Ensure Ultra mode is set properly for
* this target.
*/
ultra_enb_addr = ULTRA_ENB;
if (channel == 'B' || target > 7)
ultra_enb_addr++;
ultra_enb = ahc_inb(ahc, ultra_enb_addr);
sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
if (*scsirate != 0 && (ahc_syncrates[i].sxfr & ULTRA_SXFR)) {
ultra_enb |= 0x01 << (target & 0x07);
sxfrctl0 |= FAST20;
} else {
ultra_enb &= ~(0x01 << (target & 0x07));
sxfrctl0 &= ~FAST20;
}
ahc_outb(ahc, ultra_enb_addr, ultra_enb);
ahc_outb(ahc, SXFRCTL0, sxfrctl0);
}
#if defined(__NetBSD__)
int
ahcprint(aux, name)
void *aux;
char *name;
{
if (name != NULL)
printf("%s: scsibus ", name);
return UNCONF;
}
#endif
/*
* Attach all the sub-devices we can find
*/
int
ahc_attach(ahc)
struct ahc_softc *ahc;
{
struct scsibus_data *scbus;
#ifdef AHC_BROKEN_CACHE
if (cpu_class == CPUCLASS_386) /* doesn't have "wbinvd" instruction */
ahc_broken_cache = 0;
#endif
/*
* fill in the prototype scsi_links.
*/
#if defined(__FreeBSD__)
ahc->sc_link.adapter_unit = ahc->unit;
ahc->sc_link.adapter_targ = ahc->our_id;
ahc->sc_link.fordriver = 0;
#elif defined(__NetBSD__)
ahc->sc_link.adapter_target = ahc->our_id;
#endif
ahc->sc_link.adapter_softc = ahc;
ahc->sc_link.adapter = &ahc_switch;
ahc->sc_link.opennings = 2;
ahc->sc_link.device = &ahc_dev;
ahc->sc_link.flags = DEBUGLEVEL;
if (ahc->type & AHC_TWIN) {
/* Configure the second scsi bus */
ahc->sc_link_b = ahc->sc_link;
#if defined(__FreeBSD__)
ahc->sc_link_b.adapter_targ = ahc->our_id_b;
ahc->sc_link_b.adapter_bus = 1;
ahc->sc_link_b.fordriver = (void *)SELBUSB;
#elif defined(__NetBSD__)
ahc->sc_link_b.adapter_target = ahc->our_id_b;
#endif
}
#if defined(__FreeBSD__)
/*
* Prepare the scsibus_data area for the upperlevel
* scsi code.
*/
scbus = scsi_alloc_bus();
if(!scbus)
return 0;
scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ?
&ahc->sc_link_b : &ahc->sc_link;
if (ahc->type & AHC_WIDE)
scbus->maxtarg = 15;
/*
* ask the adapter what subunits are present
*/
if (bootverbose)
printf("ahc%d: Probing channel %c\n", ahc->unit,
(ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'B' : 'A');
scsi_attachdevs(scbus);
scbus = NULL; /* Upper-level SCSI code owns this now */
if (ahc->type & AHC_TWIN) {
scbus = scsi_alloc_bus();
if (!scbus)
return 0;
scbus->adapter_link = (ahc->flags & AHC_CHANNEL_B_PRIMARY) ?
&ahc->sc_link : &ahc->sc_link_b;
if (ahc->type & AHC_WIDE)
scbus->maxtarg = 15;
if (bootverbose)
printf("ahc%d: Probing Channel %c\n", ahc->unit,
(ahc->flags & AHC_CHANNEL_B_PRIMARY) ? 'A': 'B');
scsi_attachdevs(scbus);
scbus = NULL; /* Upper-level SCSI code owns this now */
}
#elif defined(__NetBSD__)
/*
* XXX - Update MI SCSI code
*
* if(ahc->type & AHC_WIDE)
* max target of both channel A and B = 15;
*/
/*
* ask the adapter what subunits are present
*/
if ((ahc->flags & AHC_CHANNEL_B_PRIMARY) == 0) {
/* make IS_SCSIBUS_B() == false, while probing channel A */
ahc->sc_link_b.scsibus = 0xff;
if (ahc->type & AHC_TWIN)
printf("%s: Probing channel A\n", ahc_name(ahc));
config_found((void *)ahc, &ahc->sc_link, ahcprint);
if (ahc->type & AHC_TWIN) {
printf("%s: Probing channel B\n", ahc_name(ahc));
config_found((void *)ahc, &ahc->sc_link_b, ahcprint);
}
} else {
/*
* if implementation of IS_SCSIBUS_B() is changed to use
* ahc->sc_link.scsibus, then "ahc->sc_link.scsibus = 0xff;"
* is needed, here.
*/
/* assert(ahc->type & AHC_TWIN); */
printf("%s: Probing channel B\n", ahc_name(ahc));
config_found((void *)ahc, &ahc->sc_link_b, ahcprint);
printf("%s: Probing channel A\n", ahc_name(ahc));
config_found((void *)ahc, &ahc->sc_link, ahcprint);
}
#endif
return 1;
}
/*
* Catch an interrupt from the adapter
*/
#if defined(__FreeBSD__)
void
#elif defined (__NetBSD__)
int
#endif
ahc_intr(arg)
void *arg;
{
struct ahc_softc *ahc;
u_int8_t intstat;
ahc = (struct ahc_softc *)arg;
intstat = ahc_inb(ahc, INTSTAT);
/*
* Is this interrupt for me? or for
* someone who is sharing my interrupt?
*/
if (!(intstat & INT_PEND))
#if defined(__FreeBSD__)
return;
#elif defined(__NetBSD__)
return 0;
#endif
if (intstat & CMDCMPLT) {
struct scb *scb;
u_int8_t scb_index;
u_int8_t qoutcnt;
int int_cleared;
int_cleared = 0;
while ((qoutcnt = (ahc_inb(ahc, QOUTCNT) & ahc->qcntmask)) != 0) {
ahc->cmdoutcnt += qoutcnt;
for (; qoutcnt > 0; qoutcnt--) {
scb_index = ahc_inb(ahc, QOUTFIFO);
scb = ahc->scb_data->scbarray[scb_index];
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("%s: WARNING "
"no command for scb %d "
"(cmdcmplt)\nQOUTCNT == %d\n",
ahc_name(ahc), scb_index,
qoutcnt);
continue;
}
STAILQ_INSERT_TAIL(&ahc->cmplete_scbs, scb,
links);
}
if ((ahc->flags & AHC_PAGESCBS) != 0) {
if (ahc->cmdoutcnt >= ahc->qfullcount) {
/*
* Since paging only occurs on
* aic78X0 chips, we can use
* Auto Access Pause to clear
* the command count.
*/
ahc_outb(ahc, CMDOUTCNT, 0);
ahc->cmdoutcnt = 0;
}
}
while((scb = ahc->cmplete_scbs.stqh_first) != NULL) {
STAILQ_REMOVE_HEAD(&ahc->cmplete_scbs, links);
/*
* Save off the residual if there is one.
*/
if (scb->hscb->residual_SG_segment_count != 0)
ahc_calc_residual(scb);
if ((scb->flags & SCB_QUEUED_ABORT) != 0) {
/* Have to clean up any possible
* entries in the waiting queue and
* QINFIFO.
*/
int target;
char channel;
int lun;
u_int8_t tag;
tag = SCB_LIST_NULL;
target = scb->xs->sc_link->target;
lun = scb->xs->sc_link->lun;
channel = (scb->hscb->tcl & SELBUSB)
? 'B': 'A';
if (scb->hscb->control & TAG_ENB)
tag = scb->hscb->tag;
ahc_reset_device(ahc,
target,
channel,
lun,
tag,
scb->xs->error);
ahc_run_done_queue(ahc);
}
ahc_done(ahc, scb);
}
ahc_outb(ahc, CLRINT, CLRCMDINT);
int_cleared++;
}
if (int_cleared == 0)
ahc_outb(ahc, CLRINT, CLRCMDINT);
}
if (intstat & BRKADRINT) {
/*
* We upset the sequencer :-(
* Lookup the error message
*/
int i, error, num_errors;
error = ahc_inb(ahc, ERROR);
num_errors = sizeof(hard_error)/sizeof(hard_error[0]);
for (i = 0; error != 1 && i < num_errors; i++)
error >>= 1;
printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
ahc_name(ahc), hard_error[i].errmesg,
(ahc_inb(ahc, SEQADDR1) << 8) |
ahc_inb(ahc, SEQADDR0));
ahc_reset_device(ahc, ALL_TARGETS, ALL_CHANNELS, ALL_LUNS,
SCB_LIST_NULL, XS_DRIVER_STUFFUP);
ahc_run_done_queue(ahc);
}
if (intstat & SEQINT)
ahc_handle_seqint(ahc, intstat);
if (intstat & SCSIINT)
ahc_handle_scsiint(ahc, intstat);
if (ahc->waiting_scbs.stqh_first != NULL)
ahc_run_waiting_queue(ahc);
#if defined(__NetBSD__)
return 1;
#endif
}
static void
ahc_handle_seqint(ahc, intstat)
struct ahc_softc *ahc;
u_int8_t intstat;
{
struct scb *scb;
u_int16_t targ_mask;
u_int8_t target;
int scratch_offset;
char channel;
if ((ahc_inb(ahc, SEQ_FLAGS) & RESELECTED) != 0)
target = ahc_inb(ahc, SELID);
else
target = ahc_inb(ahc, SCSIID);
target = (target >> 4) & 0x0f;
scratch_offset = target;
channel = ahc_inb(ahc, SBLKCTL) & SELBUSB ? 'B': 'A';
if (channel == 'B')
scratch_offset += 8;
targ_mask = (0x01 << scratch_offset);
switch (intstat & SEQINT_MASK) {
case NO_MATCH:
{
/*
* This could be for a normal abort request.
* Figure out the SCB that we were trying to find
* and only give an error if we didn't ask for this
* to happen.
*/
u_int8_t scb_index;
u_int8_t busy_scbid;
u_int8_t arg1;
busy_scbid = ahc_index_busy_target(ahc, target, channel,
/*unbusy*/FALSE);
arg1 = ahc_inb(ahc, ARG_1);
if (arg1 == SCB_LIST_NULL)
/* Untagged Request */
scb_index = busy_scbid;
else
scb_index = arg1;
if (scb_index < ahc->scb_data->numscbs) {
scb = ahc->scb_data->scbarray[scb_index];
if (scb->hscb->control & ABORT_SCB) {
/*
* We expected this. Let the busfree
* handler take care of this when we
* the abort is finially sent.
* Set IDENTIFY_SEEN so that the busfree
* handler knows that there is an SCB to
* cleanup.
*/
ahc_outb(ahc, SEQ_FLAGS, ahc_inb(ahc, SEQ_FLAGS)
| IDENTIFY_SEEN);
sc_print_addr(scb->xs->sc_link);
printf("reconnect SCB abort successfull\n");
break;
}
}
printf("%s:%c:%d: no active SCB for reconnecting "
"target - issuing BUS DEVICE RESET\n",
ahc_name(ahc), channel, target);
printf("SAVED_TCL == 0x%x ARG_1 == 0x%x SEQADDR == 0x%x\n",
ahc_inb(ahc, SAVED_TCL), arg1,
(ahc_inb(ahc, SEQADDR1) << 8)
| ahc_inb(ahc, SEQADDR0));
ahc_handle_devreset(ahc, target, channel);
break;
}
case NO_MATCH_BUSY:
{
/*
* XXX Leave this as a panic for the time being since
* it indicates a bug in the timeout code for this
* to happen.
*/
u_int8_t scb_index;
scb_index = ahc_inb(ahc, CUR_SCBID);
scb = ahc->scb_data->scbarray[scb_index];
panic("%s:%c:%d: Target busy link failure.\n",
ahc_name(ahc), (scb->hscb->tcl & SELBUSB) ? 'B' : 'A',
scb->xs->sc_link->target);
}
case SEND_REJECT:
{
u_int8_t rejbyte = ahc_inb(ahc, ACCUM);
printf("%s:%c:%d: Warning - unknown message received from "
"target (0x%x). SEQ_FLAGS == 0x%x. Rejecting\n",
ahc_name(ahc), channel, target, rejbyte,
ahc_inb(ahc, SEQ_FLAGS));
break;
}
case NO_IDENT:
{
/*
* The reconnecting target either did not send an identify
* message, or did, but we didn't find and SCB to match and
* before it could respond to our ATN/abort, it hit a dataphase.
* The only safe thing to do is to blow it away with a bus
* reset.
*/
int found;
printf("%s:%c:%d: Target did not send an IDENTIFY message. "
"LASTPHASE = 0x%x, SAVED_TCL == 0x%x\n",
ahc_name(ahc), channel, target, ahc_inb(ahc, LASTPHASE),
ahc_inb(ahc, SAVED_TCL));
found = ahc_reset_channel(ahc, channel, XS_TIMEOUT,
/*initiate reset*/TRUE);
printf("%s: Issued Channel %c Bus Reset. "
"%d SCBs aborted\n", ahc_name(ahc), channel, found);
break;
}
case BAD_PHASE:
if (ahc_inb(ahc, LASTPHASE) == P_BUSFREE) {
printf("%s:%c:%d: Missed busfree.\n", ahc_name(ahc),
channel, target);
restart_sequencer(ahc);
} else {
printf("%s:%c:%d: unknown scsi bus phase. Attempting "
"to continue\n", ahc_name(ahc), channel, target);
}
break;
case EXTENDED_MSG:
{
u_int8_t message_length;
u_int8_t message_code;
u_int8_t scb_index;
message_length = ahc_inb(ahc, MSGIN_EXT_LEN);
message_code = ahc_inb(ahc, MSGIN_EXT_OPCODE);
scb_index = ahc_inb(ahc, SCB_TAG);
scb = ahc->scb_data->scbarray[scb_index];
switch (message_code) {
case MSG_EXT_SDTR:
{
u_int8_t period;
u_int8_t offset;
u_int8_t saved_offset;
u_int8_t targ_scratch;
u_int8_t maxoffset;
u_int8_t rate;
if (message_length != MSG_EXT_SDTR_LEN) {
ahc_outb(ahc, RETURN_1, SEND_REJ);
break;
}
period = ahc_inb(ahc, MSGIN_EXT_BYTES);
saved_offset = ahc_inb(ahc, MSGIN_EXT_BYTES + 1);
targ_scratch = ahc_inb(ahc, TARG_SCRATCH
+ scratch_offset);
if (targ_scratch & WIDEXFER)
maxoffset = MAX_OFFSET_16BIT;
else
maxoffset = MAX_OFFSET_8BIT;
offset = MIN(saved_offset, maxoffset);
ahc_scsirate(ahc, &rate, &period, &offset,
channel, target);
/* Preserve the WideXfer flag */
targ_scratch = rate | (targ_scratch & WIDEXFER);
/*
* Update both the target scratch area and the
* current SCSIRATE.
*/
ahc_outb(ahc, TARG_SCRATCH + scratch_offset,
targ_scratch);
ahc_outb(ahc, SCSIRATE, targ_scratch);
/*
* See if we initiated Sync Negotiation
* and didn't have to fall down to async
* transfers.
*/
if ((scb->flags & SCB_MSGOUT_SDTR) != 0) {
/* We started it */
if (saved_offset == offset) {
/*
* Don't send an SDTR back to
* the target
*/
ahc_outb(ahc, RETURN_1, 0);
} else
/* Went too low - force async */
ahc_outb(ahc, RETURN_1, SEND_REJ);
} else {
/*
* Send our own SDTR in reply
*/
printf("Sending SDTR!!\n");
ahc_construct_sdtr(ahc, /*start_byte*/0,
period, offset);
ahc_outb(ahc, RETURN_1, SEND_MSG);
}
ahc->needsdtr &= ~targ_mask;
break;
}
case MSG_EXT_WDTR:
{
u_int8_t scratch, bus_width;
if (message_length != MSG_EXT_WDTR_LEN) {
ahc_outb(ahc, RETURN_1, SEND_REJ);
break;
}
bus_width = ahc_inb(ahc, MSGIN_EXT_BYTES);
scratch = ahc_inb(ahc, TARG_SCRATCH + scratch_offset);
if ((scb->flags & SCB_MSGOUT_WDTR) != 0) {
/*
* Don't send a WDTR back to the
* target, since we asked first.
*/
ahc_outb(ahc, RETURN_1, 0);
switch (bus_width){
case BUS_8_BIT:
scratch &= 0x7f;
break;
case BUS_16_BIT:
if (bootverbose)
printf("%s: target %d using "
"16Bit transfers\n",
ahc_name(ahc), target);
scratch |= WIDEXFER;
break;
case BUS_32_BIT:
/*
* How can we do 32bit transfers
* on a 16bit bus?
*/
ahc_outb(ahc, RETURN_1, SEND_REJ);
printf("%s: target %d requested 32Bit "
"transfers. Rejecting...\n",
ahc_name(ahc), target);
break;
default:
break;
}
} else {
/*
* Send our own WDTR in reply
*/
switch (bus_width) {
case BUS_8_BIT:
scratch &= 0x7f;
break;
case BUS_32_BIT:
case BUS_16_BIT:
if (ahc->type & AHC_WIDE) {
/* Negotiate 16_BITS */
bus_width = BUS_16_BIT;
if (bootverbose)
printf("%s: target %d "
"using 16Bit "
"transfers\n",
ahc_name(ahc),
target);
scratch |= WIDEXFER;
} else
bus_width = BUS_8_BIT;
break;
default:
break;
}
ahc_construct_wdtr(ahc, /*start_byte*/0,
bus_width);
ahc_outb(ahc, RETURN_1, SEND_MSG);
}
ahc->needwdtr &= ~targ_mask;
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, scratch);
ahc_outb(ahc, SCSIRATE, scratch);
break;
}
default:
/* Unknown extended message. Reject it. */
ahc_outb(ahc, RETURN_1, SEND_REJ);
}
break;
}
case REJECT_MSG:
{
/*
* What we care about here is if we had an
* outstanding SDTR or WDTR message for this
* target. If we did, this is a signal that
* the target is refusing negotiation.
*/
u_int8_t targ_scratch;
u_int8_t scb_index;
scb_index = ahc_inb(ahc, SCB_TAG);
scb = ahc->scb_data->scbarray[scb_index];
targ_scratch = ahc_inb(ahc, TARG_SCRATCH
+ scratch_offset);
if ((scb->flags & SCB_MSGOUT_WDTR) != 0) {
/* note 8bit xfers and clear flag */
targ_scratch &= 0x7f;
ahc->needwdtr &= ~targ_mask;
printf("%s:%c:%d: refuses WIDE negotiation. Using "
"8bit transfers\n", ahc_name(ahc),
channel, target);
} else if ((scb->flags & SCB_MSGOUT_SDTR) != 0) {
/* note asynch xfers and clear flag */
targ_scratch &= 0xf0;
ahc->needsdtr &= ~targ_mask;
printf("%s:%c:%d: refuses synchronous negotiation. "
"Using asynchronous transfers\n",
ahc_name(ahc),
channel, target);
} else {
/*
* Otherwise, we ignore it.
*/
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOWMISC)
printf("%s:%c:%d: Message reject -- ignored\n",
ahc_name(ahc), channel, target);
#endif
break;
}
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, targ_scratch);
ahc_outb(ahc, SCSIRATE, targ_scratch);
break;
}
case BAD_STATUS:
{
u_int8_t scb_index;
struct scsi_xfer *xs;
struct hardware_scb *hscb;
/*
* The sequencer will notify us when a command
* has an error that would be of interest to
* the kernel. This allows us to leave the sequencer
* running in the common case of command completes
* without error. The sequencer will already have
* dma'd the SCB back up to us, so we can reference
* the in kernel copy directly.
*/
scb_index = ahc_inb(ahc, SCB_TAG);
scb = ahc->scb_data->scbarray[scb_index];
hscb = scb->hscb;
/*
* Set the default return value to 0 (don't
* send sense). The sense code will change
* this if needed and this reduces code
* duplication.
*/
ahc_outb(ahc, RETURN_1, 0);
if (!(scb && (scb->flags & SCB_ACTIVE))) {
printf("%s:%c:%d: ahc_intr - referenced scb "
"not valid during seqint 0x%x scb(%d)\n",
ahc_name(ahc),
channel, target, intstat,
scb_index);
goto clear;
}
xs = scb->xs;
xs->status = hscb->status;
switch (hscb->status){
case SCSI_OK:
printf("%s: Interrupted for staus of"
" 0???\n", ahc_name(ahc));
break;
case SCSI_CHECK:
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOWSENSE) {
sc_print_addr(xs->sc_link);
printf("SCB %d: requests Check Status\n",
scb->hscb->tag);
}
#endif
if ((xs->error == XS_NOERROR)
&& !(scb->flags & SCB_SENSE)) {
struct ahc_dma_seg *sg = scb->ahc_dma;
struct scsi_sense *sc = &(scb->sense_cmd);
/*
* Save off the residual if there is one.
*/
if (hscb->residual_SG_segment_count != 0)
ahc_calc_residual(scb);
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOWSENSE) {
sc_print_addr(xs->sc_link);
printf("Sending Sense\n");
}
#endif
#if defined(__FreeBSD__)
sc->op_code = REQUEST_SENSE;
#elif defined(__NetBSD__)
sc->opcode = REQUEST_SENSE;
#endif
sc->byte2 = xs->sc_link->lun << 5;
sc->length = sizeof(struct scsi_sense_data);
sc->control = 0;
sg->addr = vtophys(&xs->sense);
sg->len = sizeof(struct scsi_sense_data);
/* XXX should allow disconnection, but
* can't as it might allow overlapped
* tagged commands.
*/
/* hscb->control &= DISCENB; */
hscb->control = 0;
hscb->status = 0;
hscb->SG_segment_count = 1;
hscb->SG_list_pointer = vtophys(sg);
hscb->data = sg->addr;
/* Maintain SCB_LINKED_NEXT */
hscb->datalen &= 0xFF000000;
hscb->datalen |= sg->len;
hscb->cmdpointer = vtophys(sc);
hscb->cmdlen = sizeof(*sc);
scb->sg_count = hscb->SG_segment_count;
scb->flags |= SCB_SENSE;
/*
* Ensure the target is busy since this
* will be an untagged request.
*/
ahc_busy_target(ahc, target, channel,
hscb->tag);
ahc_outb(ahc, RETURN_1, SEND_SENSE);
/*
* Ensure we have enough time to actually
* retrieve the sense.
*/
untimeout(ahc_timeout, (caddr_t)scb,
scb->xs->timeout_ch);
scb->xs->timeout_ch = timeout(ahc_timeout,
(caddr_t)scb, hz);
break;
}
/*
* Clear the SCB_SENSE Flag and have
* the sequencer do a normal command
* complete with either a "DRIVER_STUFFUP"
* error or whatever other error condition
* we already had.
*/
scb->flags &= ~SCB_SENSE;
if (xs->error == XS_NOERROR)
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_QUEUE_FULL:
if (scb->hscb->control & TAG_ENB) {
/*
* The upper level SCSI code in 3.0
* handles this properly...
*/
struct scsi_link *sc_link;
sc_link = xs->sc_link;
if (sc_link->active > 2
&& sc_link->opennings != 0) {
/* truncate the opennings */
sc_link->opennings = 0;
sc_print_addr(sc_link);
printf("Tagged openings reduced to "
"%d\n", sc_link->active);
}
/*
* XXX requeue this unconditionally.
*/
scb->xs->retries++;
scb->xs->error = XS_BUSY;
break;
}
/* Else treat as if it is a BUSY condition */
scb->hscb->status = SCSI_BUSY;
/* Fall Through... */
case SCSI_BUSY:
xs->error = XS_BUSY;
sc_print_addr(xs->sc_link);
printf("Target Busy\n");
break;
case SCSI_RSVD:
xs->error = XS_BUSY; /*XXX*/
sc_print_addr(xs->sc_link);
printf("Target Reserved\n");
break;
default:
sc_print_addr(xs->sc_link);
printf("unexpected targ_status: %x\n", hscb->status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
break;
}
case AWAITING_MSG:
{
int scb_index;
u_int8_t message_offset;
scb_index = ahc_inb(ahc, SCB_TAG);
scb = ahc->scb_data->scbarray[scb_index];
/*
* This SCB had MK_MESSAGE set in its control byte,
* informing the sequencer that we wanted to send a
* special message to this target.
*/
message_offset = ahc_inb(ahc, MSG_LEN);
if (scb->flags & SCB_DEVICE_RESET) {
ahc_outb(ahc, MSG_OUT, MSG_BUS_DEV_RESET);
ahc_outb(ahc, MSG_LEN, 1);
sc_print_addr(scb->xs->sc_link);
printf("Bus Device Reset Message Sent\n");
} else if (scb->flags & SCB_ABORT) {
if ((scb->hscb->control & TAG_ENB) != 0)
ahc_outb(ahc, MSG_OUT + message_offset,
MSG_ABORT_TAG);
else
ahc_outb(ahc, MSG_OUT + message_offset,
MSG_ABORT);
ahc_outb(ahc, MSG_LEN, message_offset + 1);
sc_print_addr(scb->xs->sc_link);
printf("Abort Message Sent\n");
} else if (scb->flags & SCB_MSGOUT_WDTR) {
ahc_construct_wdtr(ahc, message_offset, BUS_16_BIT);
} else if (scb->flags & SCB_MSGOUT_SDTR) {
int sxfr;
int i;
u_int16_t ultraenable;
u_int8_t target_scratch;
/* Pull the user defined setting */
target_scratch = ahc_inb(ahc, TARG_SCRATCH
+ scratch_offset);
sxfr = target_scratch & SXFR;
ultraenable = ahc_inb(ahc, ULTRA_ENB)
| (ahc_inb(ahc, ULTRA_ENB + 1) << 8);
if (ultraenable & targ_mask)
/* Want an ultra speed in the table */
sxfr |= 0x100;
for (i = 0; i < ahc_num_syncrates; i++)
if (sxfr == ahc_syncrates[i].sxfr)
break;
ahc_construct_sdtr(ahc, message_offset,
ahc_syncrates[i].period,
(target_scratch & WIDEXFER) ?
MAX_OFFSET_16BIT : MAX_OFFSET_8BIT);
} else
panic("ahc_intr: AWAITING_MSG for an SCB that "
"does not have a waiting message");
break;
}
case DATA_OVERRUN:
{
/*
* When the sequencer detects an overrun, it
* sets STCNT to 0x00ffffff and allows the
* target to complete its transfer in
* BITBUCKET mode.
*/
u_int8_t scbindex = ahc_inb(ahc, SCB_TAG);
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
u_int32_t overrun;
int i;
scb = ahc->scb_data->scbarray[scbindex];
overrun = ahc_inb(ahc, STCNT)
| (ahc_inb(ahc, STCNT + 1) << 8)
| (ahc_inb(ahc, STCNT + 2) << 16);
overrun = 0x00ffffff - overrun;
sc_print_addr(scb->xs->sc_link);
printf("data overrun of %d bytes detected in %s phase."
" Tag == 0x%x. Forcing a retry.\n", overrun,
lastphase == P_DATAIN ? "Data-In" : "Data-Out",
scb->hscb->tag);
sc_print_addr(scb->xs->sc_link);
printf("%s seen Data Phase. Length = %d. NumSGs = %d.\n",
ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
scb->xs->datalen, scb->sg_count);
for (i = 0; i < scb->sg_count; i++) {
printf("sg[%d] - Addr 0x%x : Length %d\n",
i,
scb->ahc_dma[i].addr,
scb->ahc_dma[i].len);
}
/*
* Set this and it will take affect when the
* target does a command complete.
*/
scb->xs->error = XS_DRIVER_STUFFUP;
break;
}
#if NOT_YET
/* XXX Fill these in later */
case MESG_BUFFER_BUSY:
break;
case MSGIN_PHASEMIS:
break;
#endif
#if 0
case SCB_TRACE_POINT:
{
/*
* Print out the bus phase
*/
char *phase;
u_int8_t scbindex = ahc_inb(ahc, SCB_TAG);
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
scb = ahc->scb_data->scbarray[scbindex];
sc_print_addr(scb->xs->sc_link);
switch (lastphase) {
case P_DATAOUT:
phase = "Data-Out";
break;
case P_DATAIN:
phase = "Data-In";
break;
case P_COMMAND:
phase = "Command";
break;
case P_MESGOUT:
phase = "Message-Out";
break;
case P_STATUS:
phase = "Status";
break;
case P_MESGIN:
phase = "Message-In";
break;
default:
phase = "busfree";
break;
}
printf("- %s\n", phase);
break;
}
#endif
case ABORT_CMDCMPLT:
/* This interrupt serves to pause the sequencer
* until we can clean up the QOUTFIFO allowing us
* to hanle any abort SCBs that may have completed
* yet still have an SCB in the QINFIFO or
* waiting for selection queue. By the time we get
* here, we should have already cleaned up the
* queues, so all we need to do is unpause the sequencer.
*/
break;
default:
printf("ahc_intr: seqint, "
"intstat == 0x%x, scsisigi = 0x%x\n",
intstat, ahc_inb(ahc, SCSISIGI));
break;
}
clear:
/*
* Clear the upper byte that holds SEQINT status
* codes and clear the SEQINT bit.
*/
ahc_outb(ahc, CLRINT, CLRSEQINT);
/*
* The sequencer is paused immediately on
* a SEQINT, so we should restart it when
* we're done.
*/
unpause_sequencer(ahc, /*unpause_always*/TRUE);
}
static void
ahc_handle_scsiint(ahc, intstat)
struct ahc_softc *ahc;
u_int8_t intstat;
{
u_int8_t scb_index;
u_int8_t status;
struct scb *scb;
scb_index = ahc_inb(ahc, SCB_TAG);
status = ahc_inb(ahc, SSTAT1);
if (scb_index < ahc->scb_data->numscbs) {
scb = ahc->scb_data->scbarray[scb_index];
if ((scb->flags & SCB_ACTIVE) == 0)
scb = NULL;
} else
scb = NULL;
if ((status & SCSIRSTI) != 0) {
char channel;
channel = (ahc_inb(ahc, SBLKCTL) & SELBUSB) ? 'B' : 'A';
printf("%s: Someone reset channel %c\n",
ahc_name(ahc), channel);
ahc_reset_channel(ahc,
channel,
XS_BUSY,
/* Initiate Reset */FALSE);
scb = NULL;
} else if ((status & BUSFREE) != 0 && (status & SELTO) == 0) {
/*
* First look at what phase we were last in.
* If its message out, chances are pretty good
* that the busfree was in response to one of
* our abort requests.
*/
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
u_int8_t target = (ahc_inb(ahc, SAVED_TCL) >> 4) & 0x0f;
char channel = ahc_inb(ahc, SBLKCTL) & SELBUSB ? 'B': 'A';
int printerror = 1;
ahc_outb(ahc, SCSISEQ, 0);
if (lastphase == P_MESGOUT) {
u_int8_t sindex;
u_int8_t message;
sindex = ahc_inb(ahc, SINDEX);
message = ahc_inb(ahc, sindex - 1);
if (message == MSG_ABORT) {
sc_print_addr(scb->xs->sc_link);
printf("SCB %d - Abort Completed.\n",
scb->hscb->tag);
ahc_reset_device(ahc, target, channel,
SCB_LUN(scb),
SCB_LIST_NULL,
XS_TIMEOUT);
ahc_run_done_queue(ahc);
scb = NULL;
printerror = 0;
} else if (message == MSG_ABORT_TAG) {
sc_print_addr(scb->xs->sc_link);
printf("SCB %d - Abort Tag Completed.\n",
scb->hscb->tag);
ahc_reset_device(ahc,
target,
channel,
SCB_LUN(scb),
scb->hscb->tag,
XS_TIMEOUT);
ahc_run_done_queue(ahc);
scb = NULL;
printerror = 0;
} else if (message == MSG_BUS_DEV_RESET) {
ahc_handle_devreset(ahc, target,
channel);
scb = NULL;
printerror = 0;
}
}
if (printerror != 0) {
if (scb != NULL) {
u_int8_t tag;
if ((scb->hscb->control & TAG_ENB) != 0)
tag = scb->hscb->tag;
else
tag = SCB_LIST_NULL;
ahc_reset_device(ahc, target, channel,
SCB_LUN(scb), tag, XS_TIMEOUT);
} else {
/*
* XXX can we handle this better?
* Reset the bus? Send a Bus Device Reset?
*/
ahc_reset_device(ahc, target, channel,
ALL_LUNS, SCB_LIST_NULL,
XS_TIMEOUT);
printf("%s: ", ahc_name(ahc));
}
printf("Unexpected busfree. LASTPHASE == 0x%x\n"
"SEQADDR == 0x%x\n",
lastphase, (ahc_inb(ahc, SEQADDR1) << 8)
| ahc_inb(ahc, SEQADDR0));
}
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
ahc_outb(ahc, CLRSINT1, CLRBUSFREE);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
restart_sequencer(ahc);
} else if ((status & SELTO) != 0) {
struct scsi_xfer *xs;
u_int8_t scbptr;
u_int8_t nextscb;
scbptr = ahc_inb(ahc, WAITING_SCBH);
ahc_outb(ahc, SCBPTR, scbptr);
scb_index = ahc_inb(ahc, SCB_TAG);
if (scb_index < ahc->scb_data->numscbs) {
scb = ahc->scb_data->scbarray[scb_index];
if ((scb->flags & SCB_ACTIVE) == 0)
scb = NULL;
} else
scb = NULL;
if (scb == NULL) {
printf("%s: ahc_intr - referenced scb not "
"valid during SELTO scb(%d)\n",
ahc_name(ahc), scb_index);
printf("SEQADDR = 0x%x SCSISEQ = 0x%x "
"SSTAT0 = 0x%x SSTAT1 = 0x%x\n",
ahc_inb(ahc, SEQADDR0)
| (ahc_inb(ahc, SEQADDR1) << 8),
ahc_inb(ahc, SCSISEQ), ahc_inb(ahc, SSTAT0),
ahc_inb(ahc,SSTAT1));
} else {
/*
* XXX If we queued an abort tag, go clean up the
* disconnected list.
*/
xs = scb->xs;
xs->error = XS_SELTIMEOUT;
/*
* Clear any pending messages for the timed out
* target, and mark the target as free
*/
ahc_outb(ahc, MSG_LEN, 0);
ahc_index_busy_target(ahc, SCB_TARGET(scb),
SCB_IS_SCSIBUS_B(scb) ? 'B' : 'A',
/*unbusy*/TRUE);
ahc_outb(ahc, SCB_CONTROL, 0);
/* Shift the waiting Q forward. */
nextscb = ahc_inb(ahc, SCB_NEXT);
ahc_outb(ahc, WAITING_SCBH, nextscb);
ahc_add_curscb_to_free_list(ahc);
}
/* Stop the selection */
ahc_outb(ahc, SCSISEQ, 0);
ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
restart_sequencer(ahc);
} else if (scb == NULL) {
printf("%s: ahc_intr - referenced scb not "
"valid during scsiint 0x%x scb(%d)\n"
"SIMODE0 = 0x%x, SIMODE1 = 0x%x, SSTAT0 = 0x%x\n"
"SEQADDR = 0x%x\n", ahc_name(ahc),
status, scb_index, ahc_inb(ahc, SIMODE0),
ahc_inb(ahc, SIMODE1), ahc_inb(ahc, SSTAT0),
(ahc_inb(ahc, SEQADDR1) << 8)
| ahc_inb(ahc, SEQADDR0));
ahc_outb(ahc, CLRSINT1, status);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
scb = NULL;
} else if ((status & SCSIPERR) != 0) {
/*
* Determine the bus phase and
* queue an appropriate message
*/
char *phase;
u_int8_t mesg_out = MSG_NOOP;
u_int8_t lastphase = ahc_inb(ahc, LASTPHASE);
struct scsi_xfer *xs;
xs = scb->xs;
sc_print_addr(xs->sc_link);
switch (lastphase) {
case P_DATAOUT:
phase = "Data-Out";
break;
case P_DATAIN:
phase = "Data-In";
mesg_out = MSG_INITIATOR_DET_ERR;
break;
case P_COMMAND:
phase = "Command";
break;
case P_MESGOUT:
phase = "Message-Out";
break;
case P_STATUS:
phase = "Status";
mesg_out = MSG_INITIATOR_DET_ERR;
break;
case P_MESGIN:
phase = "Message-In";
mesg_out = MSG_PARITY_ERROR;
break;
default:
phase = "unknown";
break;
}
printf("parity error during %s phase.\n", phase);
/*
* We've set the hardware to assert ATN if we
* get a parity error on "in" phases, so all we
* need to do is stuff the message buffer with
* the appropriate message. "In" phases have set
* mesg_out to something other than MSG_NOP.
*/
if (mesg_out != MSG_NOOP) {
ahc_outb(ahc, MSG_OUT, mesg_out);
ahc_outb(ahc, MSG_LEN, 1);
scb = NULL;
} else
/*
* Should we allow the target to make
* this decision for us? If we get a
* sense request from the drive, we will
* not fetch it since xs->error != XS_NOERROR.
* perhaps we need two error fields in the
* xs structure?
*/
xs->error = XS_DRIVER_STUFFUP;
ahc_outb(ahc, CLRSINT1, CLRSCSIPERR);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
} else {
sc_print_addr(scb->xs->sc_link);
printf("Unknown SCSIINT. Status = 0x%x\n", status);
ahc_outb(ahc, CLRSINT1, status);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
scb = NULL;
}
if (scb != NULL) {
/* We want to process the command */
ahc_done(ahc, scb);
}
}
static void
ahc_handle_devreset(ahc, target, channel)
struct ahc_softc *ahc;
int target;
char channel;
{
u_int16_t targ_mask;
u_int8_t targ_scratch;
int scratch_offset = target;
int found;
if (channel == 'B')
scratch_offset += 8;
targ_mask = (0x01 << scratch_offset);
/*
* Go back to async/narrow transfers and
* renegotiate.
*/
ahc->needsdtr |= ahc->needsdtr_orig & targ_mask;
ahc->needwdtr |= ahc->needwdtr_orig & targ_mask;
ahc->sdtrpending &= ~targ_mask;
ahc->wdtrpending &= ~targ_mask;
targ_scratch = ahc_inb(ahc, TARG_SCRATCH + scratch_offset);
targ_scratch &= SXFR;
ahc_outb(ahc, TARG_SCRATCH + scratch_offset, targ_scratch);
found = ahc_reset_device(ahc, target, channel, ALL_LUNS,
SCB_LIST_NULL, XS_NOERROR);
printf("%s: Bus Device Reset delivered. %d SCBs aborted\n",
ahc_name(ahc), found);
ahc_run_done_queue(ahc);
}
/*
* We have a scb which has been processed by the
* adaptor, now we look to see how the operation
* went.
*/
static void
ahc_done(ahc, scb)
struct ahc_softc *ahc;
struct scb *scb;
{
struct scsi_xfer *xs = scb->xs;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_done\n"));
/*
* If the recovery SCB completes, we have to be
* out of our timeout.
*/
if (scb->flags & SCB_RECOVERY_SCB) {
ahc->in_timeout = FALSE;
sc_print_addr(scb->xs->sc_link);
printf("no longer in timeout\n");
}
/*
* Put the results of the operation
* into the xfer and call whoever started it
*/
/* Don't override the error value. */
if (xs->error == XS_NOERROR
&& (scb->flags & SCB_SENSE) != 0)
xs->error = XS_SENSE;
#if defined(__FreeBSD__)
if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) {
/* All went correctly OR errors expected */
xs->error = XS_NOERROR;
}
#elif defined(__NetBSD__)
/*
* Since NetBSD doesn't have error ignoring operation mode
* (SCSI_ERR_OK in FreeBSD), we don't have to care this case.
*/
#endif
xs->flags |= ITSDONE;
#ifdef AHC_TAGENABLE
/*
* This functionality will be provided by the generic SCSI layer
* in FreeBSD 3.0.
*/
if (xs->cmd->opcode == INQUIRY && xs->error == XS_NOERROR) {
struct scsi_inquiry_data *inq_data;
u_int16_t mask = 0x01 << (xs->sc_link->target |
(scb->hscb->tcl & 0x08));
/*
* Sneak a look at the results of the SCSI Inquiry
* command and see if we can do Tagged queing. This
* should really be done by the higher level drivers.
*/
inq_data = (struct scsi_inquiry_data *)xs->data;
if ((inq_data->flags & SID_CmdQue)
&& !(ahc->tagenable & mask)) {
printf("%s: target %d Tagged Queuing Device\n",
ahc_name(ahc), xs->sc_link->target);
ahc->tagenable |= mask;
if (ahc->scb_data->maxhscbs >= 16
|| (ahc->flags & AHC_PAGESCBS)) {
/* Default to 8 tags */
xs->sc_link->opennings += 6;
} else {
/*
* Default to 4 tags on whimpy
* cards that don't have much SCB
* space and can't page. This prevents
* a single device from hogging all
* slots. We should really have a better
* way of providing fairness.
*/
xs->sc_link->opennings += 2;
}
}
}
#endif /* AHC_TAGENABLE */
if ((scb->flags & (SCB_MSGOUT_WDTR|SCB_MSGOUT_SDTR)) != 0) {
/*
* Turn off the pending flags for any DTR messages
* regardless of whether they completed successfully
* or not. This ensures that we don't have lingering
* state after we abort an SCB.
*/
u_int16_t mask;
mask = (0x01 << (xs->sc_link->target
| (IS_SCSIBUS_B(ahc, xs->sc_link) ? SELBUSB : 0)));
if (scb->flags & SCB_MSGOUT_WDTR)
ahc->wdtrpending &= ~mask;
if (scb->flags & SCB_MSGOUT_SDTR)
ahc->sdtrpending &= ~mask;
}
untimeout(ahc_timeout, (caddr_t)scb, scb->xs->timeout_ch);
ahc_free_scb(ahc, scb);
/*
* If we're polling, we rely on the ITS_DONE flag in the xs structure
* to know that the command has completed. Unfortunately, scsi_done
* can cause the same xs to get requeued putting us in an infinite
* loop. So, we defer the scsi_done call until the poll routine exits
* its loop. I hate the way this works.
*/
if ((xs->flags & SCSI_NOMASK) == 0)
scsi_done(xs);
}
/*
* Start the board, ready for normal operation
*/
int
ahc_init(ahc)
struct ahc_softc *ahc;
{
u_int8_t scsi_conf, sblkctl, sxfrctl1, i;
u_int16_t ultraenable = 0;
int max_targ = 15;
/*
* Assume we have a board at this stage and it has been reset.
*/
/* Handle the SCBPAGING option */
#ifndef AHC_SCBPAGING_ENABLE
ahc->flags &= ~AHC_PAGESCBS;
#endif
/* Determine channel configuration and who we are on the scsi bus. */
switch ((sblkctl = ahc_inb(ahc, SBLKCTL) & 0x0a)) {
case 0:
ahc->our_id = (ahc_inb(ahc, SCSICONF) & HSCSIID);
ahc->flags &= ~AHC_CHANNEL_B_PRIMARY;
if ((ahc->type & AHC_39X) != 0) {
char channel = 'A';
if ((ahc->flags & (AHC_CHNLB|AHC_CHNLC)) != 0)
channel = ahc->flags & AHC_CHNLB ? 'B' : 'C';
printf("Channel %c, SCSI Id=%d, ", channel,
ahc->our_id);
} else
printf("Single Channel, SCSI Id=%d, ", ahc->our_id);
ahc_outb(ahc, SEQ_FLAGS, ahc->flags & AHC_PAGESCBS);
break;
case 2:
ahc->our_id = (ahc_inb(ahc, SCSICONF + 1) & HWSCSIID);
ahc->flags &= ~AHC_CHANNEL_B_PRIMARY;
if ((ahc->type & AHC_39X) != 0) {
char channel = 'A';
if ((ahc->flags & (AHC_CHNLB|AHC_CHNLC)) != 0)
channel = ahc->flags & AHC_CHNLB ? 'B' : 'C';
printf("Wide Channel %c, SCSI Id=%d, ", channel,
ahc->our_id);
} else
printf("Wide Channel, SCSI Id=%d, ", ahc->our_id);
ahc->type |= AHC_WIDE;
ahc_outb(ahc, SEQ_FLAGS, WIDE_BUS | (ahc->flags & AHC_PAGESCBS));
break;
case 8:
ahc->our_id = (ahc_inb(ahc, SCSICONF) & HSCSIID);
ahc->our_id_b = (ahc_inb(ahc, SCSICONF + 1) & HSCSIID);
printf("Twin Channel, A SCSI Id=%d, B SCSI Id=%d, ",
ahc->our_id, ahc->our_id_b);
ahc->type |= AHC_TWIN;
ahc_outb(ahc, SEQ_FLAGS, TWIN_BUS | (ahc->flags & AHC_PAGESCBS));
break;
default:
printf(" Unsupported adapter type. Ignoring\n");
return(-1);
}
/* Determine the number of SCBs and initialize them */
if (ahc->scb_data->maxhscbs == 0) {
/* SCB 0 heads the free list */
ahc_outb(ahc, FREE_SCBH, 0);
for (i = 0; i < AHC_SCB_MAX; i++) {
ahc_outb(ahc, SCBPTR, i);
ahc_outb(ahc, SCB_CONTROL, i);
if(ahc_inb(ahc, SCB_CONTROL) != i)
break;
ahc_outb(ahc, SCBPTR, 0);
if(ahc_inb(ahc, SCB_CONTROL) != 0)
break;
ahc_outb(ahc, SCBPTR, i);
/* Clear the control byte. */
ahc_outb(ahc, SCB_CONTROL, 0);
/* Set the next pointer */
ahc_outb(ahc, SCB_NEXT, i+1);
/* Make the tag number invalid */
ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
/* No Busy non-tagged targets yet */
ahc_outb(ahc, SCB_BUSYTARGETS, SCB_LIST_NULL);
ahc_outb(ahc, SCB_BUSYTARGETS + 1, SCB_LIST_NULL);
ahc_outb(ahc, SCB_BUSYTARGETS + 2, SCB_LIST_NULL);
ahc_outb(ahc, SCB_BUSYTARGETS + 3, SCB_LIST_NULL);
}
/* Make that the last SCB terminates the free list */
ahc_outb(ahc, SCBPTR, i-1);
ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
/* Ensure we clear the 0 SCB's control byte. */
ahc_outb(ahc, SCBPTR, 0);
ahc_outb(ahc, SCB_CONTROL, 0);
ahc->scb_data->maxhscbs = i;
}
if ((ahc->scb_data->maxhscbs < AHC_SCB_MAX)
&& (ahc->flags & AHC_PAGESCBS)) {
u_int8_t max_scbid = 255;
/* Determine the number of valid bits in the FIFOs */
ahc_outb(ahc, QINFIFO, max_scbid);
max_scbid = ahc_inb(ahc, QINFIFO);
ahc->scb_data->maxscbs = MIN(AHC_SCB_MAX, max_scbid + 1);
printf("%d/%d SCBs\n", ahc->scb_data->maxhscbs,
ahc->scb_data->maxscbs);
} else {
ahc->scb_data->maxscbs = ahc->scb_data->maxhscbs;
ahc->flags &= ~AHC_PAGESCBS;
printf("%d SCBs\n", ahc->scb_data->maxhscbs);
}
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOWMISC) {
printf("%s: hardware scb %d bytes; kernel scb %d bytes; "
"ahc_dma %d bytes\n",
ahc_name(ahc),
sizeof(struct hardware_scb),
sizeof(struct scb),
sizeof(struct ahc_dma_seg));
}
#endif /* AHC_DEBUG */
/* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/
if (ahc->type & AHC_TWIN) {
/*
* The device is gated to channel B after a chip reset,
* so set those values first
*/
ahc_outb(ahc, SCSIID, ahc->our_id_b);
scsi_conf = ahc_inb(ahc, SCSICONF + 1);
sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
|(sxfrctl1 & STPWEN)
|ENSTIMER|ACTNEGEN);
ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
if (ahc->type & AHC_ULTRA)
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN|FAST20);
else
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
if (scsi_conf & RESET_SCSI) {
/* Reset the bus */
if (bootverbose)
printf("%s: Resetting Channel B\n",
ahc_name(ahc));
ahc_reset_current_bus(ahc);
}
/* Select Channel A */
ahc_outb(ahc, SBLKCTL, 0);
}
ahc_outb(ahc, SCSIID, ahc->our_id);
scsi_conf = ahc_inb(ahc, SCSICONF);
sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
|(sxfrctl1 & STPWEN)
|ENSTIMER|ACTNEGEN);
ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
if (ahc->type & AHC_ULTRA)
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN|FAST20);
else
ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
if (scsi_conf & RESET_SCSI) {
/* Reset the bus */
if (bootverbose)
printf("%s: Resetting Channel A\n", ahc_name(ahc));
ahc_reset_current_bus(ahc);
}
/*
* Look at the information that board initialization or
* the board bios has left us. In the lower four bits of each
* target's scratch space any value other than 0 indicates
* that we should initiate synchronous transfers. If it's zero,
* the user or the BIOS has decided to disable synchronous
* negotiation to that target so we don't activate the needsdtr
* flag.
*/
ahc->needsdtr_orig = 0;
ahc->needwdtr_orig = 0;
/* Grab the disconnection disable table and invert it for our needs */
if (ahc->flags & AHC_USEDEFAULTS) {
printf("%s: Host Adapter Bios disabled. Using default SCSI "
"device parameters\n", ahc_name(ahc));
ahc->discenable = 0xff;
} else
ahc->discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8)
| ahc_inb(ahc, DISC_DSB));
if (!(ahc->type & (AHC_WIDE|AHC_TWIN)))
max_targ = 7;
for (i = 0; i <= max_targ; i++) {
u_int8_t target_settings;
if (ahc->flags & AHC_USEDEFAULTS) {
target_settings = 0; /* 10MHz/20MHz */
ahc->needsdtr_orig |= (0x01 << i);
ahc->needwdtr_orig |= (0x01 << i);
if (ahc->type & AHC_ULTRA)
ultraenable |= (0x01 << i);
} else {
/* Take the settings leftover in scratch RAM. */
target_settings = ahc_inb(ahc, TARG_SCRATCH + i);
if (target_settings & 0x0f) {
ahc->needsdtr_orig |= (0x01 << i);
/*Default to a asynchronous transfers(0 offset)*/
target_settings &= 0xf0;
}
if (target_settings & 0x80) {
ahc->needwdtr_orig |= (0x01 << i);
/*
* We'll set the Wide flag when we
* are successful with Wide negotiation.
* Turn it off for now so we aren't
* confused.
*/
target_settings &= 0x7f;
}
if (ahc->type & AHC_ULTRA) {
/*
* Enable Ultra for any target that
* has a valid ultra syncrate setting.
*/
u_int8_t rate = target_settings & 0x70;
if (rate == 0x00 || rate == 0x10 ||
rate == 0x20 || rate == 0x40) {
if (rate == 0x40) {
/* Treat 10MHz specially */
target_settings &= ~0x70;
} else
ultraenable |= (0x01 << i);
}
}
}
ahc_outb(ahc, TARG_SCRATCH+i,target_settings);
}
/*
* If we are not a WIDE device, forget WDTR. This
* makes the driver work on some cards that don't
* leave these fields cleared when the BIOS is not
* installed.
*/
if ((ahc->type & AHC_WIDE) == 0)
ahc->needwdtr_orig = 0;
ahc->needsdtr = ahc->needsdtr_orig;
ahc->needwdtr = ahc->needwdtr_orig;
ahc->sdtrpending = 0;
ahc->wdtrpending = 0;
ahc->tagenable = 0;
ahc->orderedtag = 0;
ahc_outb(ahc, ULTRA_ENB, ultraenable & 0xff);
ahc_outb(ahc, ULTRA_ENB + 1, (ultraenable >> 8) & 0xff);
#ifdef AHC_DEBUG
/* How did we do? */
if (ahc_debug & AHC_SHOWMISC)
printf("NEEDSDTR == 0x%x\nNEEDWDTR == 0x%x\n"
"DISCENABLE == 0x%x\n", ahc->needsdtr,
ahc->needwdtr, ahc->discenable);
#endif
/*
* Allocate enough "hardware scbs" to handle
* the maximum number of concurrent transactions
* we can have active. We have to use contigmalloc
* if this array crosses a page boundary since the
* sequencer depends on this array being physically
* contiguous.
*/
if (ahc->scb_data->hscbs == NULL) {
size_t array_size;
u_int32_t hscb_physaddr;
array_size = ahc->scb_data->maxscbs*sizeof(struct hardware_scb);
if (array_size > PAGE_SIZE) {
ahc->scb_data->hscbs = (struct hardware_scb *)
contigmalloc(array_size, M_DEVBUF,
M_NOWAIT, 0ul, 0xffffffff,
PAGE_SIZE, 0x10000);
} else {
ahc->scb_data->hscbs = (struct hardware_scb *)
malloc(array_size, M_DEVBUF, M_NOWAIT);
}
if (ahc->scb_data->hscbs == NULL) {
printf("%s: unable to allocate hardware SCB array. "
"Failing attach\n", ahc_name(ahc));
return (-1);
}
/* At least the control byte of each hscb needs to be zeroed */
bzero(ahc->scb_data->hscbs, array_size);
/* Tell the sequencer where it can find the hscb array. */
hscb_physaddr = vtophys(ahc->scb_data->hscbs);
ahc_outb(ahc, HSCB_ADDR, hscb_physaddr & 0xFF);
ahc_outb(ahc, HSCB_ADDR + 1, (hscb_physaddr >> 8)& 0xFF);
ahc_outb(ahc, HSCB_ADDR + 2, (hscb_physaddr >> 16)& 0xFF);
ahc_outb(ahc, HSCB_ADDR + 3, (hscb_physaddr >> 24)& 0xFF);
}
/*
* Q-Full-Count. Some cards have more Q space
* then SCBs.
*/
if (ahc->type & AHC_AIC7770) {
ahc->qfullcount = 4;
ahc->qcntmask = 0x07;
} else if (ahc->type & AHC_AIC7850) {
ahc->qfullcount = 8;
ahc->qcntmask = 0x0f;
} else if (ahc->scb_data->maxhscbs == 255) {
/* 7870/7880 with external SRAM */
ahc->qfullcount = 255;
ahc->qcntmask = 0xff;
} else {
/* 7870/7880 */
ahc->qfullcount = 16;
ahc->qcntmask = 0x1f;
}
ahc_outb(ahc, CMDOUTCNT, 0);
/* We don't have any waiting selections */
ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
/* Our disconnection list is empty too */
ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
/* Message out buffer starts empty */
ahc_outb(ahc, MSG_LEN, 0x00);
/*
* Load the Sequencer program and Enable the adapter
* in "fast" mode.
*/
if (bootverbose)
printf("%s: Downloading Sequencer Program...",
ahc_name(ahc));
ahc_loadseq(ahc);
if (bootverbose)
printf("Done\n");
unpause_sequencer(ahc, /*unpause_always*/TRUE);
/*
* Note that we are going and return (to probe)
*/
ahc->flags |= AHC_INIT;
return (0);
}
static void
ahcminphys(bp)
struct buf *bp;
{
/*
* Even though the card can transfer up to 16megs per command
* we are limited by the number of segments in the dma segment
* list that we can hold. The worst case is that all pages are
* discontinuous physically, hense the "page per segment" limit
* enforced here.
*/
if (bp->b_bcount > ((AHC_NSEG - 1) * PAGE_SIZE)) {
bp->b_bcount = ((AHC_NSEG - 1) * PAGE_SIZE);
}
#if defined(__NetBSD__)
minphys(bp);
#endif
}
/*
* start a scsi operation given the command and
* the data address, target, and lun all of which
* are stored in the scsi_xfer struct
*/
static int32_t
ahc_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scb *scb;
struct hardware_scb *hscb;
struct ahc_softc *ahc;
u_int16_t mask;
int flags;
int s;
ahc = (struct ahc_softc *)xs->sc_link->adapter_softc;
mask = (0x01 << (xs->sc_link->target
| (IS_SCSIBUS_B(ahc, xs->sc_link) ? SELBUSB : 0)));
SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_scsi_cmd\n"));
flags = xs->flags;
/*
* get an scb to use. If the transfer
* is from a buf (possibly from interrupt time)
* then we can't allow it to sleep
*/
if ((scb = ahc_get_scb(ahc, flags)) == NULL) {
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
hscb = scb->hscb;
SC_DEBUG(xs->sc_link, SDEV_DB3, ("start scb(%p)\n", scb));
scb->xs = xs;
/*
* Put all the arguments for the xfer in the scb
*/
if (ahc->discenable & mask) {
hscb->control |= DISCENB;
if (ahc->tagenable & mask)
hscb->control |= MSG_SIMPLE_Q_TAG;
if (ahc->orderedtag & mask) {
/* XXX this should be handled by the upper SCSI layer */
printf("Ordered Tag sent\n");
hscb->control |= MSG_ORDERED_Q_TAG;
ahc->orderedtag &= ~mask;
}
}
if (flags & SCSI_RESET) {
scb->flags |= SCB_DEVICE_RESET;
hscb->control |= MK_MESSAGE;
} else if ((ahc->needwdtr & mask) && !(ahc->wdtrpending & mask)) {
ahc->wdtrpending |= mask;
hscb->control |= MK_MESSAGE;
scb->flags |= SCB_MSGOUT_WDTR;
} else if((ahc->needsdtr & mask) && !(ahc->sdtrpending & mask)) {
ahc->sdtrpending |= mask;
hscb->control |= MK_MESSAGE;
scb->flags |= SCB_MSGOUT_SDTR;
}
#if 0
/* Set the trace flag if this is the target we want to trace */
if (ahc->unit == 2 && xs->sc_link->target == 3)
hscb->control |= TRACE_SCB;
#endif
hscb->tcl = ((xs->sc_link->target << 4) & 0xF0)
| (IS_SCSIBUS_B(ahc,xs->sc_link)? SELBUSB : 0)
| (xs->sc_link->lun & 0x07);
hscb->cmdlen = xs->cmdlen;
hscb->cmdpointer = vtophys(xs->cmd);
xs->resid = 0;
xs->status = 0;
/* Only use S/G if non-zero length */
if (xs->datalen) {
int seg;
u_int32_t datalen;
vm_offset_t vaddr;
u_int32_t paddr;
u_int32_t nextpaddr;
struct ahc_dma_seg *sg;
seg = 0;
datalen = xs->datalen;
vaddr = (vm_offset_t)xs->data;
paddr = vtophys(vaddr);
sg = scb->ahc_dma;
hscb->SG_list_pointer = vtophys(sg);
while ((datalen > 0) && (seg < AHC_NSEG)) {
/* put in the base address and length */
sg->addr = paddr;
sg->len = 0;
/* do it at least once */
nextpaddr = paddr;
while ((datalen > 0) && (paddr == nextpaddr)) {
u_int32_t size;
/*
* This page is contiguous (physically)
* with the the last, just extend the
* length
*/
/* how far to the end of the page */
nextpaddr = (paddr & (~PAGE_MASK)) + PAGE_SIZE;
/*
* Compute the maximum size
*/
size = nextpaddr - paddr;
if (size > datalen)
size = datalen;
sg->len += size;
vaddr += size;
datalen -= size;
if (datalen > 0)
paddr = vtophys(vaddr);
}
/*
* next page isn't contiguous, finish the seg
*/
seg++;
sg++;
}
hscb->SG_segment_count = seg;
scb->sg_count = hscb->SG_segment_count;
/* Copy the first SG into the data pointer area */
hscb->data = scb->ahc_dma->addr;
hscb->datalen = scb->ahc_dma->len | (SCB_LIST_NULL << 24);
if (datalen) {
/* there's still data, must have run out of segs! */
printf("%s: ahc_scsi_cmd: more than %d DMA segs\n",
ahc_name(ahc), AHC_NSEG);
xs->error = XS_DRIVER_STUFFUP;
ahc_free_scb(ahc, scb);
return (COMPLETE);
}
#ifdef AHC_BROKEN_CACHE
if (ahc_broken_cache)
INVALIDATE_CACHE();
#endif
} else {
/*
* No data xfer, use non S/G values
*/
hscb->SG_segment_count = 0;
scb->sg_count = hscb->SG_segment_count;
hscb->SG_list_pointer = 0;
hscb->data = 0;
hscb->datalen = (SCB_LIST_NULL << 24);
}
#ifdef AHC_DEBUG
if((ahc_debug & AHC_SHOWSCBS) && (xs->sc_link->target == DEBUGTARGET))
ahc_print_scb(scb);
#endif
s = splbio();
STAILQ_INSERT_TAIL(&ahc->waiting_scbs, scb, links);
scb->flags |= SCB_ACTIVE|SCB_WAITINGQ;
ahc_run_waiting_queue(ahc);
if ((flags & SCSI_NOMASK) == 0) {
scb->xs->timeout_ch = timeout(ahc_timeout, (caddr_t)scb,
(xs->timeout * hz) / 1000);
splx(s);
return (SUCCESSFULLY_QUEUED);
}
/*
* If we can't use interrupts, poll for completion
*/
SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_poll\n"));
do {
if (ahc_poll(ahc, xs->timeout)) {
if (!(xs->flags & SCSI_SILENT))
printf("cmd fail\n");
ahc_timeout(scb);
break;
}
} while ((xs->flags & ITSDONE) == 0); /* a non command complete intr */
scsi_done(xs);
splx(s);
return (COMPLETE);
}
/*
* Look for space in the QINFIFO and queue as many SCBs in the waiting
* queue as possible. Assumes that it is called at splbio().
*/
static void
ahc_run_waiting_queue(ahc)
struct ahc_softc *ahc;
{
struct scb *scb;
pause_sequencer(ahc);
if (ahc->curqincnt >= ahc->qfullcount) {
ahc->curqincnt = ahc_inb(ahc, QINCNT) & ahc->qcntmask;
}
while ((scb = ahc->waiting_scbs.stqh_first) != NULL
&& (ahc->curqincnt < ahc->qfullcount)) {
STAILQ_REMOVE_HEAD(&ahc->waiting_scbs, links);
scb->flags &= ~SCB_WAITINGQ;
ahc_outb(ahc, QINFIFO, scb->hscb->tag);
if ((ahc->flags & AHC_PAGESCBS) != 0)
/*
* We only care about this statistic when paging
* since it is impossible to overflow the qinfifo
* in the non-paging case.
*/
ahc->curqincnt++;
}
unpause_sequencer(ahc, /*Unpause always*/FALSE);
}
/*
* An scb (and hence an scb entry on the board) is put onto the
* free list.
*/
static void
ahc_free_scb(ahc, scb)
struct ahc_softc *ahc;
struct scb *scb;
{
struct hardware_scb *hscb;
int opri;
hscb = scb->hscb;
opri = splbio();
/* Clean up for the next user */
scb->flags = SCB_FREE;
hscb->control = 0;
hscb->status = 0;
STAILQ_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links);
if (scb->links.stqe_next == NULL) {
/*
* If there were no SCBs available, wake anybody waiting
* for one to come free.
*/
wakeup((caddr_t)&ahc->scb_data->free_scbs);
}
#ifdef AHC_DEBUG
ahc->activescbs--;
#endif
splx(opri);
}
/*
* Get a free scb, either one already assigned to a hardware slot
* on the adapter or one that will require an SCB to be paged out before
* use. If there are none, see if we can allocate a new SCB. Otherwise
* either return an error or sleep.
*/
static struct scb *
ahc_get_scb(ahc, flags)
struct ahc_softc *ahc;
u_int32_t flags;
{
struct scb *scbp;
int opri;
opri = splbio();
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can't allocate a new one.
*/
while (1) {
if ((scbp = ahc->scb_data->free_scbs.stqh_first)) {
STAILQ_REMOVE_HEAD(&ahc->scb_data->free_scbs, links);
} else if(ahc->scb_data->numscbs < ahc->scb_data->maxscbs) {
scbp = ahc_alloc_scb(ahc);
if (scbp == NULL)
printf("%s: Can't malloc SCB\n", ahc_name(ahc));
} else if ((flags & SCSI_NOSLEEP) == 0) {
tsleep((caddr_t)&ahc->scb_data->free_scbs, PRIBIO,
"ahcscb", 0);
continue;
}
break;
}
#ifdef AHC_DEBUG
if (scbp) {
ahc->activescbs++;
if((ahc_debug & AHC_SHOWSCBCNT)
&& (ahc->activescbs == ahc->scb_data->maxhscbs))
printf("%s: Max SCBs active\n", ahc_name(ahc));
}
#endif
splx(opri);
return (scbp);
}
static struct scb *
ahc_alloc_scb(ahc)
struct ahc_softc *ahc;
{
static struct ahc_dma_seg *next_sg_array = NULL;
static int sg_arrays_free = 0;
struct scb *newscb;
newscb = (struct scb *) malloc(sizeof(struct scb), M_DEVBUF, M_NOWAIT);
if (newscb != NULL) {
bzero(newscb, sizeof(struct scb));
if (next_sg_array == NULL) {
size_t alloc_size = sizeof(struct ahc_dma_seg)
* AHC_NSEG;
sg_arrays_free = PAGE_SIZE / alloc_size;
alloc_size *= sg_arrays_free;
if (alloc_size == 0)
panic("%s: SG list doesn't fit in a page",
ahc_name(ahc));
next_sg_array = (struct ahc_dma_seg *)
malloc(alloc_size, M_DEVBUF, M_NOWAIT);
}
if (next_sg_array != NULL) {
struct hardware_scb *hscb;
newscb->ahc_dma = next_sg_array;
sg_arrays_free--;
if (sg_arrays_free == 0)
next_sg_array = NULL;
else
next_sg_array = &next_sg_array[AHC_NSEG];
hscb = &ahc->scb_data->hscbs[ahc->scb_data->numscbs];
newscb->hscb = hscb;
hscb->control = 0;
hscb->status = 0;
hscb->tag = ahc->scb_data->numscbs;
hscb->residual_data_count[2] = 0;
hscb->residual_data_count[1] = 0;
hscb->residual_data_count[0] = 0;
hscb->residual_SG_segment_count = 0;
ahc->scb_data->numscbs++;
/*
* Place in the scbarray
* Never is removed.
*/
ahc->scb_data->scbarray[hscb->tag] = newscb;
} else {
free(newscb, M_DEVBUF);
newscb = NULL;
}
}
return newscb;
}
static void
ahc_loadseq(struct ahc_softc *ahc)
{
int options;
struct patch *cur_patch;
int i;
int downloaded;
u_int8_t download_consts[4];
options = 1; /* Code for all options */
downloaded = 0;
if ((ahc->type & AHC_ULTRA) != 0)
options |= ULTRA;
if ((ahc->type & AHC_TWIN) != 0)
options |= TWIN_CHANNEL;
if (ahc->scb_data->maxscbs > ahc->scb_data->maxhscbs)
options |= SCB_PAGING;
/* Setup downloadable constant table */
download_consts[SCBCOUNT] = ahc->scb_data->maxhscbs;
download_consts[COMP_SCBCOUNT] = -ahc->scb_data->maxscbs & 0xFF;
download_consts[FIFODEPTH] = ahc->qfullcount;
download_consts[QCNTMASK] = ahc->qcntmask;
cur_patch = patches;
ahc_outb(ahc, SEQCTL, PERRORDIS|LOADRAM);
ahc_outb(ahc, SEQADDR0, 0);
ahc_outb(ahc, SEQADDR1, 0);
for(i = 0; i < sizeof(seqprog)/4; i++) {
cur_patch = ahc_next_patch(cur_patch, options, i);
if (cur_patch && cur_patch->begin <= i && cur_patch->end > i)
/* Skip this instruction for this configuration */
continue;
ahc_download_instr(ahc, options, i, download_consts);
downloaded++;
}
ahc_outb(ahc, SEQCTL, FASTMODE);
ahc_outb(ahc, SEQADDR0, 0);
ahc_outb(ahc, SEQADDR1, 0);
if (bootverbose)
printf("%s: %d instructions downloaded\n", ahc_name(ahc),
downloaded);
}
static struct patch *
ahc_next_patch(cur_patch, options, instrptr)
struct patch *cur_patch;
int options;
int instrptr;
{
while(cur_patch != NULL) {
if (((cur_patch->options & options) != 0
&& cur_patch->negative == FALSE)
|| ((cur_patch->options & options) == 0
&& cur_patch->negative == TRUE)
|| (instrptr >= cur_patch->end)) {
/*
* Either we want to keep this section of code,
* or we have consumed this patch. Skip to the
* next patch.
*/
cur_patch++;
if (cur_patch->options == 0)
/* Out of patches */
cur_patch = NULL;
} else
/* Found an okay patch */
break;
}
return (cur_patch);
}
static void
ahc_download_instr(struct ahc_softc *ahc, int options,
int instrptr, u_int8_t *dconsts)
{
u_int8_t opcode;
struct ins_format3 instr;
/* Structure copy */
instr = *(struct ins_format3 *)&seqprog[instrptr * 4];
/* Pull the opcode */
opcode = (instr.opcode_addr & ~DOWNLOAD_CONST_IMMEDIATE) >> 1;
switch (opcode) {
case AIC_OP_JMP:
case AIC_OP_JC:
case AIC_OP_JNC:
case AIC_OP_CALL:
case AIC_OP_JNE:
case AIC_OP_JNZ:
case AIC_OP_JE:
case AIC_OP_JZ:
{
int address_offset;
u_int address;
struct patch *patch;
int i;
address_offset = 0;
address = instr.address;
address |= (instr.opcode_addr & ADDR_HIGH_BIT) << 8;
for (i = 0; i < sizeof(patches)/sizeof(patches[0]); i++) {
patch = &patches[i];
if (((patch->options & options) == 0
&& patch->negative == FALSE)
|| ((patch->options & options) != 0
&& patch->negative == TRUE)) {
if (address >= patch->end)
address_offset +=
patch->end - patch->begin;
}
}
address -= address_offset;
instr.address = address & 0xFF;
instr.opcode_addr &= ~ADDR_HIGH_BIT;
instr.opcode_addr |= (address >> 8) & ADDR_HIGH_BIT;
/* FALLTHROUGH */
}
case AIC_OP_OR:
case AIC_OP_AND:
case AIC_OP_XOR:
case AIC_OP_ADD:
case AIC_OP_ADC:
if ((instr.opcode_addr & DOWNLOAD_CONST_IMMEDIATE) != 0) {
instr.immediate = dconsts[instr.immediate];
}
instr.opcode_addr &= ~DOWNLOAD_CONST_IMMEDIATE;
/* FALLTHROUGH */
case AIC_OP_ROL:
ahc_outsb(ahc, SEQRAM, &instr.immediate, 4);
break;
default:
panic("Unknown opcode encountered in seq program");
break;
}
}
/*
* Function to poll for command completion when
* interrupts are disabled (crash dumps)
*/
static int
ahc_poll(ahc, wait)
struct ahc_softc *ahc;
int wait; /* in msec */
{
while (--wait) {
DELAY(1000);
if (ahc_inb(ahc, INTSTAT) & INT_PEND)
break;
} if (wait == 0) {
printf("%s: board is not responding\n", ahc_name(ahc));
return (EIO);
}
ahc_intr((void *)ahc);
return (0);
}
static void
ahc_timeout(arg)
void *arg;
{
struct scb *scb = (struct scb *)arg;
struct ahc_softc *ahc;
int s, found;
u_int8_t bus_state;
char channel;
ahc = (struct ahc_softc *)scb->xs->sc_link->adapter_softc;
s = splbio();
/*
* Ensure that the card doesn't do anything
* behind our back. Also make sure that we
* didn't "just" miss an interrupt that would
* affect this timeout.
*/
do {
ahc_intr(ahc);
pause_sequencer(ahc);
} while (ahc_inb(ahc, INTSTAT) & INT_PEND);
if (!(scb->flags & SCB_ACTIVE)) {
/* Previous timeout took care of me already */
printf("Timedout SCB handled by another timeout\n");
unpause_sequencer(ahc, /*unpause_always*/TRUE);
splx(s);
return;
}
if (ahc->in_timeout) {
/*
* Some other SCB has started a recovery operation
* and is still working on cleaning things up.
*/
if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
/*
* This is not the SCB that started this timeout
* processing. Give this scb another lifetime so
* that it can continue once we deal with the
* timeout.
*/
scb->flags |= SCB_TIMEDOUT;
sc_print_addr(scb->xs->sc_link);
printf("SCB 0x%x timedout while recovery in progress\n",
scb->hscb->tag);
scb->xs->timeout_ch =
timeout(ahc_timeout, (caddr_t)scb,
(scb->xs->timeout * hz) / 1000);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
splx(s);
return;
}
}
ahc->in_timeout = TRUE;
sc_print_addr(scb->xs->sc_link);
printf("SCB 0x%x - timed out ", scb->hscb->tag);
/*
* Take a snapshot of the bus state and print out
* some information so we can track down driver bugs.
*/
bus_state = ahc_inb(ahc, LASTPHASE);
switch(bus_state)
{
case P_DATAOUT:
printf("in dataout phase");
break;
case P_DATAIN:
printf("in datain phase");
break;
case P_COMMAND:
printf("in command phase");
break;
case P_MESGOUT:
printf("in message out phase");
break;
case P_STATUS:
printf("in status phase");
break;
case P_MESGIN:
printf("in message in phase");
break;
case P_BUSFREE:
printf("while idle, LASTPHASE == 0x%x",
bus_state);
break;
default:
/*
* We aren't in a valid phase, so assume we're
* idle.
*/
printf("invalid phase, LASTPHASE == 0x%x",
bus_state);
break;
}
printf(", SCSISIGI == 0x%x\n", ahc_inb(ahc, SCSISIGI));
printf("SEQADDR = 0x%x SCSISEQ = 0x%x SSTAT0 = 0x%x SSTAT1 = 0x%x\n",
ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8),
ahc_inb(ahc, SCSISEQ), ahc_inb(ahc, SSTAT0),
ahc_inb(ahc,SSTAT1));
/* Decide our course of action */
channel = (scb->hscb->tcl & SELBUSB) ? 'B': 'A';
if (scb->flags & SCB_ABORT) {
/*
* Been down this road before.
* Do a full bus reset.
*/
bus_reset:
scb->flags |= SCB_RECOVERY_SCB;
found = ahc_reset_channel(ahc, channel, XS_TIMEOUT,
/*Initiate Reset*/TRUE);
printf("%s: Issued Channel %c Bus Reset. "
"%d SCBs aborted\n", ahc_name(ahc), channel, found);
} else if ((scb->hscb->control & TAG_ENB) != 0
&& (scb->flags & SCB_SENTORDEREDTAG) == 0) {
/*
* We could be starving this command
* try sending an ordered tag command
* to the target we come from.
*/
u_int16_t mask;
mask = (0x01 << (scb->xs->sc_link->target
| (IS_SCSIBUS_B(ahc, scb->xs->sc_link) ?
SELBUSB : 0)));
scb->flags |= SCB_SENTORDEREDTAG|SCB_RECOVERY_SCB;
ahc->orderedtag |= mask;
scb->xs->timeout_ch = timeout(ahc_timeout, (caddr_t)scb,
(5 * hz));
unpause_sequencer(ahc, /*unpause_always*/TRUE);
printf("Ordered Tag queued\n");
} else {
/*
* Send an Abort Message:
* The target that is holding up the bus may not
* be the same as the one that triggered this timeout
* (different commands have different timeout lengths).
* Our strategy here is to queue an abort message
* to the timed out target if it is disconnected.
* Otherwise, if we have an active target we stuff the
* message buffer with an abort message and assert ATN
* in the hopes that the target will let go of the bus
* and go to the mesgout phase. If this fails, we'll
* get another timeout 2 seconds later which will attempt
* a bus reset.
*/
u_int8_t saved_scbptr;
u_int8_t active_scb_index;
struct scb *active_scb;
saved_scbptr = ahc_inb(ahc, SCBPTR);
active_scb_index = ahc_inb(ahc, SCB_TAG);
active_scb = ahc->scb_data->scbarray[active_scb_index];
if (bus_state != P_BUSFREE) {
if (active_scb_index >= ahc->scb_data->numscbs) {
/* Go "immediatly" to the bus reset */
/*
* XXX queue an abort for the timedout SCB
* instead.
*/
sc_print_addr(scb->xs->sc_link);
printf("SCB %d: Yucky Immediate reset. "
"Flags = 0x%x\n", scb->hscb->tag,
scb->flags);
goto bus_reset;
}
/* Send the abort to the active SCB */
ahc_outb(ahc, MSG_LEN, 1);
ahc_outb(ahc, MSG_OUT,
(active_scb->hscb->control & TAG_ENB) == 0 ?
MSG_ABORT : MSG_ABORT_TAG);
ahc_outb(ahc, SCSISIGO, bus_state|ATNO);
sc_print_addr(active_scb->xs->sc_link);
printf("abort message in message buffer\n");
active_scb->flags |= SCB_ABORT|SCB_RECOVERY_SCB;
if (active_scb != scb) {
untimeout(ahc_timeout,
(caddr_t)active_scb,
active_scb->xs->timeout_ch);
/* Give scb a new lease on life */
scb->xs->timeout_ch =
timeout(ahc_timeout, (caddr_t)scb,
(scb->xs->timeout * hz) / 1000);
}
active_scb->xs->timeout_ch =
timeout(ahc_timeout, active_scb, 2 * hz);
unpause_sequencer(ahc, /*unpause_always*/TRUE);
} else {
int disconnected;
u_int8_t hscb_index;
u_int8_t linked_next;
disconnected = FALSE;
hscb_index = ahc_find_scb(ahc, scb);
if (hscb_index == SCB_LIST_NULL) {
disconnected = TRUE;
linked_next = (scb->hscb->datalen >> 24)
& 0xFF;
} else {
ahc_outb(ahc, SCBPTR, hscb_index);
if (ahc_inb(ahc, SCB_CONTROL) & DISCONNECTED)
disconnected = TRUE;
linked_next = ahc_inb(ahc, SCB_LINKED_NEXT);
}
if (disconnected) {
/*
* Simply set the ABORT_SCB control bit
* and preserve the linked next pointer
*/
scb->hscb->control |= ABORT_SCB|MK_MESSAGE;
scb->hscb->datalen &= ~0xFF000000;
scb->hscb->datalen |= linked_next << 24;
if ((ahc->flags & AHC_PAGESCBS) == 0)
scb->hscb->control &= ~DISCONNECTED;
scb->flags |= SCB_QUEUED_ABORT
| SCB_ABORT|SCB_RECOVERY_SCB;
if (hscb_index != SCB_LIST_NULL) {
u_int8_t scb_control;
scb_control = ahc_inb(ahc, SCB_CONTROL);
ahc_outb(ahc, SCB_CONTROL,
scb_control | MK_MESSAGE
| ABORT_SCB);
}
/*
* Actually re-queue this SCB in case we can
* select the device before it reconnects. If
* the transaction we want to abort is not
* tagged, unbusy it first so that we don't
* get held back from sending the command.
*/
if ((scb->hscb->control & TAG_ENB) == 0) {
int target;
int lun;
target = scb->xs->sc_link->target;
lun = scb->xs->sc_link->lun;
ahc_search_qinfifo(ahc, target,
channel,
lun,
SCB_LIST_NULL,
0, 0,
/*requeue*/TRUE);
}
sc_print_addr(scb->xs->sc_link);
printf("Queueing an Abort SCB\n");
STAILQ_INSERT_HEAD(&ahc->waiting_scbs, scb,
links);
scb->flags |= SCB_WAITINGQ;
scb->xs->timeout_ch =
timeout(ahc_timeout, (caddr_t)scb,
(2000 * hz) / 1000);
ahc_outb(ahc, SCBPTR, saved_scbptr);
/*
* ahc_run_waiting_queue may unpause us
* so do this last.
*/
ahc_run_waiting_queue(ahc);
/*
* If we are using AAP, ahc_run_waiting_queue
* will not unpause us, so ensure we are
* unpaused.
*/
unpause_sequencer(ahc, /*unpause_always*/FALSE);
} else {
/* Go "immediatly" to the bus reset */
sc_print_addr(scb->xs->sc_link);
printf("SCB %d: Immediate reset. "
"Flags = 0x%x\n", scb->hscb->tag,
scb->flags);
goto bus_reset;
}
}
}
splx(s);
}
/*
* Look through the SCB array of the card and attempt to find the
* hardware SCB that corresponds to the passed in SCB. Return
* SCB_LIST_NULL if unsuccessful. This routine assumes that the
* card is already paused.
*/
static u_int8_t
ahc_find_scb(ahc, scb)
struct ahc_softc *ahc;
struct scb *scb;
{
u_int8_t saved_scbptr;
u_int8_t curindex;
saved_scbptr = ahc_inb(ahc, SCBPTR);
for (curindex = 0; curindex < ahc->scb_data->maxhscbs; curindex++) {
ahc_outb(ahc, SCBPTR, curindex);
if (ahc_inb(ahc, SCB_TAG) == scb->hscb->tag)
break;
}
ahc_outb(ahc, SCBPTR, saved_scbptr);
if (curindex >= ahc->scb_data->maxhscbs)
curindex = SCB_LIST_NULL;
return curindex;
}
static int
ahc_search_qinfifo(ahc, target, channel, lun, tag, flags, xs_error, requeue)
struct ahc_softc *ahc;
int target;
char channel;
int lun;
u_int8_t tag;
u_int32_t flags;
u_int32_t xs_error;
int requeue;
{
u_int8_t saved_queue[AHC_SCB_MAX];
int queued = ahc_inb(ahc, QINCNT) & ahc->qcntmask;
int i;
int found;
struct scb *scbp;
STAILQ_HEAD(, scb) removed_scbs;
found = 0;
STAILQ_INIT(&removed_scbs);
for (i = 0; i < (queued - found); i++) {
saved_queue[i] = ahc_inb(ahc, QINFIFO);
scbp = ahc->scb_data->scbarray[saved_queue[i]];
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
/*
* We found an scb that needs to be removed.
*/
if (requeue) {
STAILQ_INSERT_HEAD(&removed_scbs, scbp, links);
} else {
scbp->flags |= flags;
scbp->flags &= ~SCB_ACTIVE;
scbp->xs->error = xs_error;
}
i--;
found++;
}
}
/* Now put the saved scbs back. */
for (queued = 0; queued < i; queued++)
ahc_outb(ahc, QINFIFO, saved_queue[queued]);
if (requeue) {
while ((scbp = removed_scbs.stqh_first) != NULL) {
STAILQ_REMOVE_HEAD(&removed_scbs, links);
STAILQ_INSERT_HEAD(&ahc->waiting_scbs, scbp, links);
scbp->flags |= SCB_WAITINGQ;
}
}
return found;
}
/*
* The device at the given target/channel has been reset. Abort
* all active and queued scbs for that target/channel.
*/
static int
ahc_reset_device(ahc, target, channel, lun, tag, xs_error)
struct ahc_softc *ahc;
int target;
char channel;
int lun;
u_int8_t tag;
u_int32_t xs_error;
{
struct scb *scbp;
u_int8_t active_scb;
int i;
int found;
/* restore this when we're done */
active_scb = ahc_inb(ahc, SCBPTR);
/*
* Deal with the busy target and linked next issues.
*/
{
int min_target, max_target;
u_int8_t busy_scbid;
/* Make all targets 'relative' to bus A */
if (target == ALL_TARGETS) {
switch (channel) {
case 'A':
min_target = 0;
max_target = ahc->type & AHC_WIDE ? 15 : 7;
break;
case 'B':
min_target = 8;
max_target = 15;
break;
case ALL_CHANNELS:
min_target = 0;
max_target = ahc->type & (AHC_WIDE|AHC_TWIN)
? 15 : 7;
break;
default:
/* Shutup warning */
min_target = 0;
max_target = 0;
panic("ahc_reset_device: Bogus Channel");
/* NOTREACHED */
}
} else {
min_target = max_target
= target + (channel == 'B' ? 8 : 0);
}
for (i = min_target; i <= max_target; i++) {
busy_scbid = ahc_index_busy_target(ahc, i, 'A',
/*unbusy*/FALSE);
if (busy_scbid < ahc->scb_data->numscbs) {
struct scb *busy_scb;
struct scb *next_scb;
u_int8_t next_scbid;
busy_scb = ahc->scb_data->scbarray[busy_scbid];
next_scbid = busy_scb->hscb->datalen >> 24;
if (next_scbid == SCB_LIST_NULL) {
busy_scbid = ahc_find_scb(ahc,
busy_scb);
if (busy_scbid != SCB_LIST_NULL) {
ahc_outb(ahc, SCBPTR,
busy_scbid);
next_scbid = ahc_inb(ahc,
SCB_LINKED_NEXT);
}
}
if (ahc_match_scb(busy_scb, target, channel,
lun, tag)) {
ahc_index_busy_target(ahc, i, 'A',
/*unbusy*/TRUE);
}
if (next_scbid != SCB_LIST_NULL) {
next_scb = ahc->scb_data->scbarray[next_scbid];
if (ahc_match_scb(next_scb, target,
channel, lun, tag))
continue;
/* Requeue for later processing */
STAILQ_INSERT_HEAD(&ahc->waiting_scbs,
next_scb, links);
next_scb->flags |= SCB_WAITINGQ;
}
}
}
}
/*
* Remove any entries from the Queue-In FIFO.
*/
found = ahc_search_qinfifo(ahc, target, channel, lun, tag,
SCB_ABORTED|SCB_QUEUED_FOR_DONE, xs_error,
/*requeue*/FALSE);
/*
* Search waiting for selection list.
*/
{
u_int8_t next, prev;
next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
prev = SCB_LIST_NULL;
while (next != SCB_LIST_NULL) {
u_int8_t scb_index;
ahc_outb(ahc, SCBPTR, next);
scb_index = ahc_inb(ahc, SCB_TAG);
if (scb_index >= ahc->scb_data->numscbs) {
panic("Waiting List inconsistency. "
"SCB index == %d, yet numscbs == %d.",
scb_index, ahc->scb_data->numscbs);
}
scbp = ahc->scb_data->scbarray[scb_index];
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
u_int8_t linked_next;
next = ahc_abort_wscb(ahc, scbp, next, prev,
xs_error);
linked_next = ahc_inb(ahc, SCB_LINKED_NEXT);
if (linked_next != SCB_LIST_NULL) {
struct scb *next_scb;
/*
* Re-queue the waiting SCB via the
* waiting list.
*/
next_scb =
ahc->scb_data->scbarray[linked_next];
if (!ahc_match_scb(next_scb, target,
channel, lun, tag)) {
STAILQ_INSERT_HEAD(&ahc->waiting_scbs,
next_scb,
links);
next_scb->flags |= SCB_WAITINGQ;
}
}
found++;
} else {
prev = next;
next = ahc_inb(ahc, SCB_NEXT);
}
}
}
/*
* Go through the disconnected list and remove any entries we
* have queued for completion, 0'ing their control byte too.
*/
{
u_int8_t next, prev;
next = ahc_inb(ahc, DISCONNECTED_SCBH);
prev = SCB_LIST_NULL;
while (next != SCB_LIST_NULL) {
u_int8_t scb_index;
ahc_outb(ahc, SCBPTR, next);
scb_index = ahc_inb(ahc, SCB_TAG);
if (scb_index >= ahc->scb_data->numscbs) {
panic("Disconnected List inconsistency. "
"SCB index == %d, yet numscbs == %d.",
scb_index, ahc->scb_data->numscbs);
}
scbp = ahc->scb_data->scbarray[scb_index];
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
next = ahc_rem_scb_from_disc_list(ahc, next);
} else {
prev = next;
next = ahc_inb(ahc, SCB_NEXT);
}
}
}
/*
* Go through the hardware SCB array looking for commands that
* were active but not on any list.
*/
for(i = 0; i < ahc->scb_data->maxhscbs; i++) {
u_int8_t scbid;
ahc_outb(ahc, SCBPTR, i);
scbid = ahc_inb(ahc, SCB_TAG);
if (scbid < ahc->scb_data->numscbs) {
scbp = ahc->scb_data->scbarray[scbid];
if (ahc_match_scb(scbp, target, channel, lun, tag)) {
ahc_add_curscb_to_free_list(ahc);
}
}
}
/*
* Go through the entire SCB array now and look for
* commands for this target that are still active. These
* are other tagged commands that were disconnected when
* the reset occured or untagged commands that were linked
* to the command that preceeded it.
*/
for (i = 0; i < ahc->scb_data->numscbs; i++) {
scbp = ahc->scb_data->scbarray[i];
if ((scbp->flags & SCB_ACTIVE) != 0
&& ahc_match_scb(scbp, target, channel, lun, tag)) {
scbp->flags |= SCB_ABORTED|SCB_QUEUED_FOR_DONE;
scbp->flags &= ~SCB_ACTIVE;
scbp->xs->error = xs_error;
found++;
if ((scbp->flags & SCB_WAITINGQ) != 0) {
STAILQ_REMOVE(&ahc->waiting_scbs, scbp, scb,
links);
scbp->flags &= ~SCB_WAITINGQ;
}
}
}
ahc_outb(ahc, SCBPTR, active_scb);
return found;
}
static u_int8_t
ahc_rem_scb_from_disc_list(ahc, scbptr)
struct ahc_softc *ahc;
u_int8_t scbptr;
{
u_int8_t next;
u_int8_t prev;
ahc_outb(ahc, SCBPTR, scbptr);
next = ahc_inb(ahc, SCB_NEXT);
prev = ahc_inb(ahc, SCB_PREV);
ahc_outb(ahc, SCB_CONTROL, 0);
ahc_add_curscb_to_free_list(ahc);
if (prev != SCB_LIST_NULL) {
ahc_outb(ahc, SCBPTR, prev);
ahc_outb(ahc, SCB_NEXT, next);
} else
ahc_outb(ahc, DISCONNECTED_SCBH, next);
if (next != SCB_LIST_NULL) {
ahc_outb(ahc, SCBPTR, next);
ahc_outb(ahc, SCB_PREV, prev);
}
return next;
}
static void
ahc_add_curscb_to_free_list(ahc)
struct ahc_softc *ahc;
{
/* Invalidate the tag so that ahc_find_scb doesn't think it's active */
ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH));
ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR));
}
/*
* Manipulate the waiting for selection list and return the
* scb that follows the one that we remove.
*/
static u_char
ahc_abort_wscb (ahc, scbp, scbpos, prev, xs_error)
struct ahc_softc *ahc;
struct scb *scbp;
u_int8_t scbpos;
u_int8_t prev;
u_int32_t xs_error;
{
u_int8_t curscb, next;
/*
* Select the SCB we want to abort and
* pull the next pointer out of it.
*/
curscb = ahc_inb(ahc, SCBPTR);
ahc_outb(ahc, SCBPTR, scbpos);
next = ahc_inb(ahc, SCB_NEXT);
/* Clear the necessary fields */
ahc_outb(ahc, SCB_CONTROL, 0);
ahc_add_curscb_to_free_list(ahc);
/* update the waiting list */
if (prev == SCB_LIST_NULL)
/* First in the list */
ahc_outb(ahc, WAITING_SCBH, next);
else {
/*
* Select the scb that pointed to us
* and update its next pointer.
*/
ahc_outb(ahc, SCBPTR, prev);
ahc_outb(ahc, SCB_NEXT, next);
}
/*
* Point us back at the original scb position
* and inform the SCSI system that the command
* has been aborted.
*/
ahc_outb(ahc, SCBPTR, curscb);
scbp->flags |= SCB_ABORTED|SCB_QUEUED_FOR_DONE;
scbp->flags &= ~SCB_ACTIVE;
scbp->xs->error = xs_error;
return next;
}
static u_int8_t
ahc_index_busy_target(ahc, target, channel, unbusy)
struct ahc_softc *ahc;
int target;
char channel;
int unbusy;
{
u_int8_t active_scb;
u_int8_t info_scb;
u_int8_t busy_scbid;
u_int32_t scb_offset;
info_scb = target / 4;
if (channel == 'B')
info_scb += 2;
active_scb = ahc_inb(ahc, SCBPTR);
ahc_outb(ahc, SCBPTR, info_scb);
scb_offset = SCB_BUSYTARGETS + (target & 0x03);
busy_scbid = ahc_inb(ahc, scb_offset);
if (unbusy)
ahc_outb(ahc, scb_offset, SCB_LIST_NULL);
ahc_outb(ahc, SCBPTR, active_scb);
return busy_scbid;
}
static void
ahc_busy_target(ahc, target, channel, scbid)
struct ahc_softc *ahc;
int target;
char channel;
u_int8_t scbid;
{
u_int8_t active_scb;
u_int8_t info_scb;
u_int32_t scb_offset;
info_scb = target / 4;
if (channel == 'B')
info_scb += 2;
active_scb = ahc_inb(ahc, SCBPTR);
ahc_outb(ahc, SCBPTR, info_scb);
scb_offset = SCB_BUSYTARGETS + (target & 0x03);
ahc_outb(ahc, scb_offset, scbid);
ahc_outb(ahc, SCBPTR, active_scb);
return;
}
static void
ahc_clear_intstat(ahc)
struct ahc_softc *ahc;
{
/* Clear any interrupt conditions this may have caused */
ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
|CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
CLRREQINIT);
ahc_outb(ahc, CLRINT, CLRSCSIINT);
}
static void
ahc_reset_current_bus(ahc)
struct ahc_softc *ahc;
{
u_int8_t scsiseq;
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
scsiseq = ahc_inb(ahc, SCSISEQ);
ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
DELAY(AHC_BUSRESET_DELAY);
/* Turn off the bus reset */
ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO);
ahc_clear_intstat(ahc);
/* Re-enable reset interrupts */
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST);
}
static int
ahc_reset_channel(ahc, channel, xs_error, initiate_reset)
struct ahc_softc *ahc;
char channel;
u_int32_t xs_error;
int initiate_reset;
{
u_int32_t offset, offset_max;
int found;
u_int8_t sblkctl;
char cur_channel;
pause_sequencer(ahc);
/*
* Clean up all the state information for the
* pending transactions on this bus.
*/
found = ahc_reset_device(ahc, ALL_TARGETS, channel, ALL_LUNS,
SCB_LIST_NULL, xs_error);
if (channel == 'B') {
ahc->needsdtr |= (ahc->needsdtr_orig & 0xff00);
ahc->sdtrpending &= 0x00ff;
ahc->orderedtag &= 0x00ff;
offset = TARG_SCRATCH + 8;
offset_max = TARG_SCRATCH + 16;
} else if (ahc->type & AHC_WIDE){
ahc->needsdtr = ahc->needsdtr_orig;
ahc->needwdtr = ahc->needwdtr_orig;
ahc->orderedtag = 0;
ahc->sdtrpending = 0;
ahc->wdtrpending = 0;
offset = TARG_SCRATCH;
offset_max = TARG_SCRATCH + 16;
} else {
ahc->needsdtr |= (ahc->needsdtr_orig & 0x00ff);
ahc->sdtrpending &= 0xff00;
ahc->orderedtag &= 0xff00;
offset = TARG_SCRATCH;
offset_max = TARG_SCRATCH + 8;
}
for (; offset < offset_max; offset++) {
/*
* Revert to async/narrow transfers
* until we renegotiate.
*/
u_int8_t targ_scratch;
targ_scratch = ahc_inb(ahc, offset);
targ_scratch &= SXFR;
ahc_outb(ahc, offset, targ_scratch);
}
/*
* Reset the bus if we are initiating this reset and
* restart/unpause the sequencer
*/
sblkctl = ahc_inb(ahc, SBLKCTL);
cur_channel = (sblkctl & SELBUSB) ? 'B' : 'A';
if (cur_channel != channel) {
/* Case 1: Command for another bus is active
* Stealthily reset the other bus without
* upsetting the current bus.
*/
ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
if (initiate_reset)
ahc_reset_current_bus(ahc);
ahc_outb(ahc, SCSISEQ, 0);
ahc_clear_intstat(ahc);
ahc_outb(ahc, SBLKCTL, sblkctl);
unpause_sequencer(ahc, /*unpause_always*/FALSE);
} else {
/* Case 2: A command from this bus is active or we're idle */
ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
if (initiate_reset)
ahc_reset_current_bus(ahc);
ahc_outb(ahc, SCSISEQ, 0);
ahc_clear_intstat(ahc);
restart_sequencer(ahc);
}
/*
* Untimeout our scbs now in case we have to delay our done
* processing.
*/
ahc_untimeout_done_queue(ahc);
ahc_run_done_queue(ahc);
return found;
}
static void
ahc_run_done_queue(ahc)
struct ahc_softc *ahc;
{
int i;
struct scb *scbp;
for (i = 0; i < ahc->scb_data->numscbs; i++) {
scbp = ahc->scb_data->scbarray[i];
if (scbp->flags & SCB_QUEUED_FOR_DONE)
ahc_done(ahc, scbp);
}
}
static void
ahc_untimeout_done_queue(ahc)
struct ahc_softc *ahc;
{
int i;
struct scb *scbp;
for (i = 0; i < ahc->scb_data->numscbs; i++) {
scbp = ahc->scb_data->scbarray[i];
if (scbp->flags & SCB_QUEUED_FOR_DONE)
untimeout(ahc_timeout, (caddr_t)scbp,
scbp->xs->timeout_ch);
}
}
static int
ahc_match_scb (scb, target, channel, lun, tag)
struct scb *scb;
int target;
char channel;
int lun;
u_int8_t tag;
{
int targ = (scb->hscb->tcl >> 4) & 0x0f;
char chan = (scb->hscb->tcl & SELBUSB) ? 'B' : 'A';
int slun = scb->hscb->tcl & 0x07;
int match;
match = ((chan == channel) || (channel == ALL_CHANNELS));
if (match != 0)
match = ((targ == target) || (target == ALL_TARGETS));
if (match != 0)
match = ((lun == slun) || (lun == ALL_LUNS));
if (match != 0)
match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
return match;
}
static void
ahc_construct_sdtr(ahc, start_byte, period, offset)
struct ahc_softc *ahc;
int start_byte;
u_int8_t period;
u_int8_t offset;
{
ahc_outb(ahc, MSG_OUT + start_byte, MSG_EXTENDED);
ahc_outb(ahc, MSG_OUT + 1 + start_byte, MSG_EXT_SDTR_LEN);
ahc_outb(ahc, MSG_OUT + 2 + start_byte, MSG_EXT_SDTR);
ahc_outb(ahc, MSG_OUT + 3 + start_byte, period);
ahc_outb(ahc, MSG_OUT + 4 + start_byte, offset);
ahc_outb(ahc, MSG_LEN, start_byte + 5);
}
static void
ahc_construct_wdtr(ahc, start_byte, bus_width)
struct ahc_softc *ahc;
int start_byte;
u_int8_t bus_width;
{
ahc_outb(ahc, MSG_OUT + start_byte, MSG_EXTENDED);
ahc_outb(ahc, MSG_OUT + 1 + start_byte, MSG_EXT_WDTR_LEN);
ahc_outb(ahc, MSG_OUT + 2 + start_byte, MSG_EXT_WDTR);
ahc_outb(ahc, MSG_OUT + 3 + start_byte, bus_width);
ahc_outb(ahc, MSG_LEN, start_byte + 4);
}
static void
ahc_calc_residual(scb)
struct scb *scb;
{
struct scsi_xfer *xs;
struct hardware_scb *hscb;
int resid_sgs;
xs = scb->xs;
hscb = scb->hscb;
/*
* If the disconnected flag is still set, this is bogus
* residual information left over from a sequencer
* pagin/pageout, so ignore this case.
*/
if ((scb->hscb->control & DISCONNECTED) == 0
&& (scb->flags & SCB_SENSE) == 0) {
/*
* Remainder of the SG where the transfer
* stopped.
*/
xs->resid = (hscb->residual_data_count[2] <<16) |
(hscb->residual_data_count[1] <<8) |
(hscb->residual_data_count[0]);
/*
* Add up the contents of all residual
* SG segments that are after the SG where
* the transfer stopped.
*/
resid_sgs = scb->hscb->residual_SG_segment_count - 1;
while (resid_sgs > 0) {
int sg;
sg = scb->sg_count - resid_sgs;
xs->resid += scb->ahc_dma[sg].len;
resid_sgs--;
}
#if defined(__FreeBSD__)
xs->flags |= SCSI_RESID_VALID;
#elif defined(__NetBSD__)
/* XXX - Update to do this right */
#endif
}
/*
* Clean out the residual information in this SCB for its
* next consumer.
*/
hscb->residual_data_count[2] = 0;
hscb->residual_data_count[1] = 0;
hscb->residual_data_count[0] = 0;
hscb->residual_SG_segment_count = 0;
#ifdef AHC_DEBUG
if (ahc_debug & AHC_SHOWMISC) {
sc_print_addr(xs->sc_link);
printf("Handled Residual of %ld bytes\n" ,xs->resid);
}
#endif
}
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