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freebsd-src/sys/i386/isa/seagate.c
Justin T. Gibbs 07b1c6b3c9 Remove hard coded assumption that SCSI busses have 7 targets. 
This change forces the controller drivers to allocate a scsibus_data struct
via a call to scsi_alloc_bus(), fill in the adapter_link field, and optionally
modify any other fields of the struct.  Scsi_alloc_bus() initializes all fields
to the default, so the changes in most drivers are very minimal.  For drivers
that support Wide controllers, the maxtarg field will have to be updated to
allow probing of all targets (for an example, look at the aic7xxx driver).

Scsi_attachdevs() now takes a scsibus_data* as its argument instead of an
sc_link*.  This allows us to expand the role of the scsibus_data struct for
other bus level configuration setings (max number of transactions, current
transaction opennings, etc for better tagged queuing support).

Reviewed by: Rodney Grimes <rgrimes>, Peter Dufault <dufault>, Julian Elischer <julian>
1995-08-23 23:03:34 +00:00

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/*
* (Free/Net/386)BSD ST01/02, Future Domain TMC-885, TMC-950 SCSI driver for
* Julians SCSI-code
*
* Copyright 1994, Kent Palmkvist (kentp@isy.liu.se)
* Copyright 1994, Robert Knier (rknier@qgraph.com)
* Copyright 1992, 1994 Drew Eckhardt (drew@colorado.edu)
* Copyright 1994, Julian Elischer (julian@tfs.com)
* Copyright 1994-1995, Serge Vakulenko (vak@cronyx.ru)
* Copyright 1995 Stephen Hocking (sysseh@devetir.qld.gov.au)
*
* Others that has contributed by example code is
* Glen Overby (overby@cray.com)
* Tatu Yllnen
* Brian E Litzinger
*
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``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 DEVELOPERS 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.
*/
/*
* kentp 940307 alpha version based on newscsi-03 version of Julians SCSI-code
* kentp 940314 Added possibility to not use messages
* rknier 940331 Added fast transfer code
* rknier 940407 Added assembler coded data transfers
* vak 941226 New probe algorithm, based on expected behaviour
* instead of BIOS signatures analysis, better timeout handling,
* new asm fragments for data input/output, target-dependent
* delays, device flags, polling mode, generic cleanup
* vak 950115 Added request-sense ops
* seh 950701 Fixed up Future Domain TMC-885 problems with disconnects,
* weird phases and the like. (we could probably investigate
* what the board's idea of the phases are, but that requires
* doco that I don't have). Note that it is slower than the
* 2.0R driver with both SEA_BLINDTRANSFER & SEA_ASSEMBLER
* defined by a factor of more than 2. I'll look at that later!
* seh 950712 The performance release 8^). Put in the blind transfer code
* from the 2.0R source. Don't use it by commenting out the
* SEA_BLINDTRANSFER below. Note that it only kicks in during
* DATAOUT or DATAIN and then only when the transfer is a
* multiple of BLOCK_SIZE bytes (512). Most devices fit into
* that category, with the possible exception of scanners and
* some of the older MO drives.
*
* $Id: seagate.c,v 1.9 1995/07/13 15:01:38 jkh Exp $
*/
/*
* What should really be done:
*
* Restructure interrupt enable/disable code (runs too long with int disabled)
* Add code to handle Future Domain 840, 841, 880 and 881
* Add code to use tagged commands in SCSI2
* Add code to handle slow devices better (sleep if device not disconnecting)
* Fix unnecessary interrupts
*/
/* Note to users trying to share a disk between DOS and unix:
* The ST01/02 is a translating host-adapter. It is not giving DOS
* the same number of heads/tracks/sectors as specified by the disk.
* It is therefore important to look at what numbers DOS thinks the
* disk has. Use these to disklabel your disk in an appropriate manner
*
* About ST02+IDE coexistence: the original Seagate ST02
* BIOS cannot coexist with IDE or any other disk controller
* because it does not share BIOS disk drive numbers (80h, 81h)
* with others. New probing code allows using ST02 controller
* without BIOS: just unplug the ST02 BIOS chip from the board.
*
* Another problem is the floppy adapter on ST02 which could not be
* disabled by jumpers. I commonly use ST02 adapter as a cheap solution
* for atttaching the tape and CD-ROM drives, and an extra floppy controller
* is just a headache. I found a simple workaround: cutting off
* the AEN signal (A11 contact on ISA connector). AEN then goes high and
* disables the floppy adapter port address decoder.
*
* I also had a problem with ST02 conflicting with IDE during
* IDE data write phase. It seems than ST02 makes some noise
* on /IOW line. The /IOW line is used only for floppy controller
* part of ST02, and because I don't need it, I cut off the /IOW (contact B13)
* and it helped. (vak)
*
* Tested on the following hardware:
* Adapter: Seagate ST02
* Disk: HP D1686
* Streamers: Archive Viper 150, Wangtek 5525
* CD-ROMs: Toshiba XM-3401, NEC CDR-25
*
* Maximum data rate is about 270-280 kbytes/sec (on 386DX/40).
* (vak)
*/
#undef DEBUG
#include "sea.h"
#if NSEA > 0
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/devconf.h>
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifdef DEBUG
# define PRINT(s) printf s
#else
# define PRINT(s) /*void*/
#endif
#define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */
#define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */
#define HOST_SCSI_ADDR 7 /* address of the adapter on the SCSI bus */
#define SEA_BLINDTRANSFER 1 /* for quicker than quick xfers */
/*
* Define config flags
*/
#define FLAG_NOPARITY 0x01 /* disable SCSI bus parity check */
/*
* Board CONTROL register
*/
#define CMD_RST 0x01 /* scsi reset */
#define CMD_SEL 0x02 /* scsi select */
#define CMD_BSY 0x04 /* scsi busy */
#define CMD_ATTN 0x08 /* scsi attention */
#define CMD_START_ARB 0x10 /* start arbitration bit */
#define CMD_EN_PARITY 0x20 /* enable scsi parity generation */
#define CMD_INTR 0x40 /* enable scsi interrupts */
#define CMD_DRVR_ENABLE 0x80 /* scsi enable */
/*
* Board STATUS register
*/
#define STAT_BSY 0x01 /* scsi busy */
#define STAT_MSG 0x02 /* scsi msg */
#define STAT_IO 0x04 /* scsi I/O */
#define STAT_CD 0x08 /* scsi C/D */
#define STAT_REQ 0x10 /* scsi req */
#define STAT_SEL 0x20 /* scsi select */
#define STAT_PARITY 0x40 /* parity error bit */
#define STAT_ARB_CMPL 0x80 /* arbitration complete bit */
#define STAT_BITS "\20\1bsy\2msg\3i/o\4c/d\5req\6sel\7parity\10arb"
/*
* SCSI bus phases
*/
#define PHASE_MASK (STAT_MSG | STAT_CD | STAT_IO)
#define PHASE_DATAOUT 0
#define PHASE_DATAIN STAT_IO
#define PHASE_CMDOUT STAT_CD
#define PHASE_STATIN (STAT_CD | STAT_IO)
#define PHASE_MSGOUT (STAT_MSG | STAT_CD)
#define PHASE_MSGIN (STAT_MSG | STAT_CD | STAT_IO)
#define PHASE_NAME(ph) phase_name[(ph)>>2]
static char *phase_name[] = {
"DATAOUT", "Phase1?", "Phase2?", "Phase3?",
"DATAIN", "Phase5?", "Phase6?", "Phase7?",
"CMDOUT", "Phase9?", "MSGOUT", "Phase11?",
"STATIN", "Phase13?", "MSGIN", "Phase15?",
};
/*
* SCSI message codes
*/
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_SAVE_POINTERS 0x02
#define MSG_RESTORE_POINTERS 0x03
#define MSG_DISCONNECT 0x04
#define MSG_ABORT 0x06
#define MSG_MESSAGE_REJECT 0x07
#define MSG_NOP 0x08
#define MSG_BUS_DEV_RESET 0x0c
#define MSG_IDENTIFY(lun) (0xc0 | ((lun) & 0x7))
#define MSG_ISIDENT(m) ((m) & 0x80)
/*
* SCSI control block used to keep info about a scsi command
*/
typedef struct scb {
int flags; /* status of the instruction */
#define SCB_FREE 0x00
#define SCB_ACTIVE 0x01
#define SCB_ABORTED 0x02
#define SCB_TIMEOUT 0x04
#define SCB_ERROR 0x08
#define SCB_TIMECHK 0x10 /* we have set a timeout on this one */
#define SCB_SENSE 0x20 /* sensed data available */
#define SCB_TBUSY 0x40 /* target busy */
struct scb *next; /* in free list */
struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
u_char *data; /* position in data buffer so far */
int32 datalen; /* bytes remaining to transfer */;
} scb_t;
typedef enum {
CTLR_NONE,
CTLR_SEAGATE,
CTLR_FUTURE_DOMAIN,
} ctlr_t;
/*
* Flags for waiting for REQ deassert during some SCSI bus phases.
*/
typedef struct {
unsigned cmdout1 : 1; /* after CMDOUT[0] byte */
unsigned cmdout : 1; /* after CMDOUT[1..N] bytes */
unsigned msgout : 1; /* after MSGOUT byte */
unsigned statin : 1; /* after STATIN byte */
} phase_t;
/*
* Data structure describing the target state.
*/
typedef struct {
struct adapter *adapter; /* pointer to the adapter structure */
u_char busy; /* mask of busy luns at device target */
u_long perrcnt; /* counter of target parity errors */
phase_t ndelay; /* "don't delay" flags */
phase_t init; /* "initialized" flags */
} target_t;
/*
* Data structure describing current status of the scsi bus. One for each
* controller card.
*/
typedef struct adapter {
ctlr_t type; /* Seagate or Future Domain */
char *name; /* adapter name */
volatile u_char *addr; /* base address for card */
volatile u_char *CONTROL; /* address of control register */
volatile u_char *STATUS; /* address of status register */
volatile u_char *DATA; /* address of data register */
u_char scsi_addr; /* our scsi address, 0..7 */
u_char scsi_id; /* our scsi id mask */
u_char parity; /* parity flag: CMD_EN_PARITY or 0 */
u_char irq; /* IRQ number used or 0 if no IRQ */
u_int timeout_active : 1; /* timeout() active (requested) */
struct scsi_link sc_link; /* struct connecting different data */
scb_t *queue; /* waiting to be issued */
scb_t *disconnected_queue; /* waiting to reconnect */
int numscb; /* number of scsi control blocks */
scb_t *free_scb; /* free scb list */
scb_t scbs[SCB_TABLE_SIZE];
target_t target[8]; /* target state data */
} adapter_t;
adapter_t seadata[NSEA];
#define IS_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &\
(1 << (b)->xfer->sc_link->lun))
#define SET_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy |=\
(1 << (b)->xfer->sc_link->lun))
#define CLEAR_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &=\
~(1 << (b)->xfer->sc_link->lun))
/*
* Wait for condition, given as an boolean expression.
* Print the message on timeout.
*/
#define WAITFOR(condition,message) {\
register u_long cnt = 100000; char *msg = message;\
while (cnt-- && ! (condition)) continue;\
if (cnt == -1 && msg)\
printf ("sea: %s timeout\n", msg); }
#define WAITFOR10(condition,message) {\
register u_long cnt = 1000000; char *msg = message;\
while (cnt-- && ! (condition)) continue;\
if (cnt == -1 && msg)\
printf ("sea: %s timeout\n", msg); }
/*
* Seagate adapter does not support in hardware
* waiting for REQ deassert after transferring each data byte.
* We must do it in software.
* The problem is that some SCSI devices deassert REQ so fast that
* we can miss it. We the flag for each target sayind if we should (not)
* wait for REQ deassert. This flag is initialized when the first
* operation on the target is done.
* 1) Test if we don't need to wait for REQ deassert (`nodelay' flag).
* Initially the flag is off, i.e. wait. If the flag is set,
* go to the step 4.
* 2) Wait for REQ deassert (call sea_wait_for_req_deassert function).
* If REQ deassert got, go to the step 4. If REQ did not cleared
* during timeout period, go to the next step.
* 3) If `nodelay' flag did not initialized yet (`init' flag),
* then set `ndelay' flag.
* 4) Set `init' flag. Done.
*/
#define WAITREQ(t,op,cnt) {\
if (! (t)->ndelay.op &&\
! sea_wait_for_req_deassert ((t)->adapter, cnt, #op) &&\
! (t)->init.op)\
(t)->ndelay.op = 1;\
(t)->init.op = 1; }
int seaintr (int unit);
static int sea_probe (struct isa_device *dev);
static int sea_detect (adapter_t *z, struct isa_device *dev);
static int sea_attach (struct isa_device *dev);
static int32 sea_scsi_cmd (struct scsi_xfer *xs);
static u_int32 sea_adapter_info (int unit);
static void sea_timeout (void *scb);
static void seaminphys (struct buf *bp);
static void sea_done (adapter_t *z, scb_t *scb);
static void sea_start (adapter_t *z);
static void sea_information_transfer (adapter_t *z, scb_t *scb);
static int sea_poll (adapter_t *z, scb_t *scb);
static int sea_init (adapter_t *z);
static int sea_reselect (adapter_t *z);
static int sea_select (volatile adapter_t *z, scb_t *scb);
static int sea_abort (adapter_t *z, scb_t *scb);
static void sea_send_abort (adapter_t *z);
static u_char sea_msg_input (adapter_t *z);
static void sea_tick (void *arg);
static int sea_sense (adapter_t *z, scb_t *scb);
static void sea_data_output (adapter_t *z, u_char **pdata, u_long *plen);
static void sea_data_input (adapter_t *z, u_char **pdata, u_long *plen);
static void sea_cmd_output (target_t *z, u_char *cmd, int cmdlen);
static struct scsi_adapter sea_switch = {
sea_scsi_cmd, seaminphys, 0, 0, sea_adapter_info, "sea", {0},
};
static struct scsi_device sea_dev = { NULL, NULL, NULL, NULL, "sea", 0, {0} };
struct isa_driver seadriver = { sea_probe, sea_attach, "sea" };
static char sea_description [80]; /* XXX BOGUS!!! */
static struct kern_devconf sea_kdc[NSEA] = {{
0, 0, 0, "sea", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, 0,
DC_UNCONFIGURED, sea_description,
DC_CLS_MISC /* host adapters aren't special */
} };
/* FD TMC885's can't handle detach & re-attach */
static int sea_select_cmd = CMD_DRVR_ENABLE | CMD_ATTN;
/*
* Check if the device can be found at the port given and if so,
* detect the type of board. Set it up ready for further work.
* Takes the isa_dev structure from autoconf as an argument.
* Returns 1 if card recognized, 0 if errors.
*/
int sea_probe (struct isa_device *dev)
{
adapter_t *z = &seadata[dev->id_unit];
static const addrtab[] = {
0xc8000, 0xca000, 0xcc000, 0xce000, 0xdc000, 0xde000, 0,
};
int i;
if (dev->id_unit)
sea_kdc[dev->id_unit] = sea_kdc[0];
sea_kdc[dev->id_unit].kdc_unit = dev->id_unit;
sea_kdc[dev->id_unit].kdc_isa = dev;
dev_attach (&sea_kdc[dev->id_unit]);
/* Init fields used by our routines */
z->parity = (dev->id_flags & FLAG_NOPARITY) ? 0 : CMD_EN_PARITY;
z->scsi_addr = HOST_SCSI_ADDR;
z->scsi_id = 1 << z->scsi_addr;
z->irq = dev->id_irq ? ffs (dev->id_irq) - 1 : 0;
z->queue = 0;
z->disconnected_queue = 0;
for (i=0; i<8; i++) {
z->target[i].adapter = z;
z->target[i].busy = 0;
}
/* Link up the free list of scbs */
z->numscb = SCB_TABLE_SIZE;
z->free_scb = z->scbs;
for (i=1; i<SCB_TABLE_SIZE; i++)
z->scbs[i-1].next = z->scbs + i;
z->scbs[SCB_TABLE_SIZE-1].next = 0;
/* Detect the adapter. */
dev->id_msize = 0x4000;
if (! dev->id_maddr)
for (i=0; addrtab[i]; ++i) {
dev->id_maddr = (u_char*) KERNBASE + addrtab[i];
if (sea_detect (z, dev))
return (1);
}
else if (sea_detect (z, dev))
return (1);
bzero (z, sizeof (*z));
return (0);
}
int sea_detect (adapter_t *z, struct isa_device *dev)
{
z->addr = dev->id_maddr;
/* Try Seagate. */
z->type = CTLR_SEAGATE;
z->name = "Seagate ST01/ST02";
z->CONTROL = z->addr + 0x1a00; /* ST01/ST02 register offsets */
z->STATUS = z->addr + 0x1a00;
z->DATA = z->addr + 0x1c00;
if (sea_init (z) == 0)
return (1);
/* Try Future Domain. */
z->type = CTLR_FUTURE_DOMAIN;
z->name = "Future Domain TMC-885/TMC-950";
z->CONTROL = z->addr + 0x1c00; /* TMC-885/TMC-950 reg. offsets */
z->STATUS = z->addr + 0x1c00;
z->DATA = z->addr + 0x1e00;
/* FD TMC885's can't handle detach & re-attach */
sea_select_cmd = CMD_DRVR_ENABLE;
/* FD TMC-885 is supposed to be at id 6. How strange. */
z->scsi_addr = HOST_SCSI_ADDR - 1;
z->scsi_id = 1 << z->scsi_addr;
if (sea_init (z) == 0)
return (1);
return (0);
}
/*
* Probe the adapter, and if found, reset the board and the scsi bus.
* Return 0 if the adapter found.
*/
int sea_init (adapter_t *z)
{
volatile u_char *p;
int i, c;
/* Check that STATUS..STATUS+200h are equal. */
p = z->STATUS;
c = *p;
if (c == 0xff)
return (2);
while (++p < z->STATUS+0x200)
if (*p != c)
return (3);
/* Check that DATA..DATA+200h are equal. */
for (p=z->DATA, c= *p++; p<z->DATA+0x200; ++p)
if (*p != c)
return (4);
/* Check that addr..addr+1800h are not writable. */
for (p=z->addr; p<z->addr+0x1800; ++p) {
c = *p;
*p = ~c;
if (*p == ~c) {
*p = c;
return (5);
}
}
/* Check that addr+1800h..addr+1880h are writable. */
for (p=z->addr+0x1800; p<z->addr+0x1880; ++p) {
c = *p;
*p = 0x55;
if (*p != 0x55) {
*p = c;
return (6);
}
*p = 0xaa;
if (*p != 0xaa) {
*p = c;
return (7);
}
}
/* Reset the scsi bus (I don't know if this is needed). */
*z->CONTROL = CMD_RST | CMD_DRVR_ENABLE | z->parity | CMD_INTR;
/* Hold reset for at least 25 microseconds. */
DELAY (25);
/* Check that status cleared. */
if (*z->STATUS != 0) {
*z->CONTROL = 0;
return (8);
}
/* Check that DATA register is writable. */
for (i=0; i<256; ++i) {
*z->DATA = i;
if (*z->DATA != i) {
*z->CONTROL = 0;
return (9);
}
}
/* Enable the adapter. */
*z->CONTROL = CMD_INTR | z->parity;
/* Wait a Bus Clear Delay (800 ns + bus free delay 800 ns). */
DELAY (10);
/* Check that DATA register is NOT writable. */
c = *z->DATA;
for (i=0; i<256; ++i) {
*z->DATA = i;
if (*z->DATA != c) {
*z->CONTROL = 0;
return (10);
}
}
return (0);
}
/*
* Attach all sub-devices we can find.
*/
int sea_attach (struct isa_device *dev)
{
int unit = dev->id_unit;
adapter_t *z = &seadata[unit];
struct scsibus_data *scbus;
sea_kdc[unit].kdc_state = DC_BUSY; /* host adapters are always busy */
sprintf (sea_description, "%s SCSI controller", z->name);
printf ("\nsea%d: type %s%s\n", unit, z->name,
(dev->id_flags & FLAG_NOPARITY) ? ", no parity" : "");
/* fill in the prototype scsi_link */
z->sc_link.adapter_unit = unit;
z->sc_link.adapter_targ = z->scsi_addr;
z->sc_link.adapter = &sea_switch;
z->sc_link.device = &sea_dev;
/*
* Prepare the scsibus_data area for the upperlevel
* scsi code.
*/
scbus = scsi_alloc_bus();
if(!scbus)
return 0;
scbus->adapter_link = &z->sc_link;
/* ask the adapter what subunits are present */
scsi_attachdevs (scbus);
return (1);
}
/*
* Return some information to the caller about
* the adapter and its capabilities.
*/
u_int32 sea_adapter_info (int unit)
{
return (1);
}
void seaminphys (struct buf *bp)
{
}
/*
* Catch an interrupt from the adaptor.
*/
int seaintr (int unit)
{
adapter_t *z = &seadata[unit];
PRINT (("sea%d: interrupt status=%b\n", unit, *z->STATUS, STAT_BITS));
sea_start (z);
return (1);
}
/*
* This routine is used in the case when we have no IRQ line (z->irq == 0).
* It is called every timer tick and polls for reconnect from target.
*/
void sea_tick (void *arg)
{
adapter_t *z = arg;
int x = splbio ();
z->timeout_active = 0;
sea_start (z);
if (z->disconnected_queue && ! z->timeout_active) {
timeout (sea_tick, z, 1);
z->timeout_active = 1;
}
splx (x);
}
/*
* Start a scsi operation given the command and the data address.
* Also needs the unit, target and lu. Get a free scb and set it up.
* Call send_scb. Either start timer or wait until done.
*/
int32 sea_scsi_cmd (struct scsi_xfer *xs)
{
int unit = xs->sc_link->adapter_unit, flags = xs->flags, x = 0;
adapter_t *z = &seadata[unit];
scb_t *scb;
PRINT (("sea%d/%d/%d command 0x%x\n", unit, xs->sc_link->target,
xs->sc_link->lun, xs->cmd->opcode));
if (xs->bp)
flags |= SCSI_NOSLEEP;
if (flags & ITSDONE) {
printf ("sea%d: already done?", unit);
xs->flags &= ~ITSDONE;
}
if (! (flags & INUSE)) {
printf ("sea%d: not in use?", unit);
xs->flags |= INUSE;
}
if (flags & SCSI_RESET)
printf ("sea%d: SCSI_RESET not implemented\n", unit);
if (! (flags & SCSI_NOMASK))
x = splbio ();
/* Get a free scb.
* If we can and have to, sleep waiting for one to come free. */
while (! (scb = z->free_scb)) {
if (flags & SCSI_NOSLEEP) {
xs->error = XS_DRIVER_STUFFUP;
if (! (flags & SCSI_NOMASK))
splx (x);
return (TRY_AGAIN_LATER);
}
tsleep ((caddr_t)&z->free_scb, PRIBIO, "seascb", 0);
}
/* Get scb from free list. */
z->free_scb = scb->next;
scb->next = 0;
scb->flags = SCB_ACTIVE;
/* Put all the arguments for the xfer in the scb */
scb->xfer = xs;
scb->datalen = xs->datalen;
scb->data = xs->data;
/* Setup the scb to contain necessary values.
* The interesting values can be read from the xs that is saved.
* I therefore think that the structure can be kept very small.
* The driver doesn't use DMA so the scatter/gather is not needed? */
if (! z->queue) {
scb->next = z->queue;
z->queue = scb;
} else {
scb_t *q;
for (q=z->queue; q->next; q=q->next)
continue;
q->next = scb;
scb->next = 0; /* placed at the end of the queue */
}
/* Try to send this command to the board. */
sea_start (z);
/* Usually return SUCCESSFULLY QUEUED. */
if (! (flags & SCSI_NOMASK)) {
splx (x);
if (xs->flags & ITSDONE)
/* Timeout timer not started, already finished.
* Tried to return COMPLETE but the machine hanged
* with this. */
return (SUCCESSFULLY_QUEUED);
timeout (sea_timeout, (caddr_t) scb, (xs->timeout * hz) / 1000);
scb->flags |= SCB_TIMECHK;
PRINT (("sea%d/%d/%d command queued\n", unit,
xs->sc_link->target, xs->sc_link->lun));
return (SUCCESSFULLY_QUEUED);
}
/* If we can't use interrupts, poll on completion. */
if (! sea_poll (z, scb)) {
/* We timed out, so call the timeout handler manually,
* accounting for the fact that the clock is not running yet
* by taking out the clock queue entry it makes. */
sea_timeout ((void*) scb);
/* Because we are polling, take out the timeout entry
* sea_timeout made. */
untimeout (sea_timeout, (void*) scb);
if (! sea_poll (z, scb))
/* We timed out again... This is bad. Notice that
* this time there is no clock queue entry to remove. */
sea_timeout ((void*) scb);
}
PRINT (("sea%d/%d/%d command %s\n", unit,
xs->sc_link->target, xs->sc_link->lun,
xs->error ? "failed" : "done"));
return (xs->error ? HAD_ERROR : COMPLETE);
}
/*
* Coroutine that runs as long as more work can be done.
* Both scsi_cmd() and intr() will try to start it in
* case it is not running.
* Always called with interrupts disabled.
*/
void sea_start (adapter_t *z)
{
scb_t *q, *prev;
again:
/* First check that if any device has tried
* a reconnect while we have done other things
* with interrupts disabled. */
if (sea_reselect (z))
goto again;
/* Search through the queue for a command
* destined for a target that's not busy. */
for (q=z->queue, prev=0; q; prev=q, q=q->next) {
/* Attempt to establish an I_T_L nexus here. */
if (IS_BUSY (z, q) || ! sea_select (z, q))
continue;
/* Remove the command from the issue queue. */
if (prev)
prev->next = q->next;
else
z->queue = q->next;
q->next = 0;
/* We are connected. Do the task. */
sea_information_transfer (z, q);
goto again;
}
}
void sea_timeout (void *arg)
{
scb_t *scb = (scb_t*) arg;
int unit = scb->xfer->sc_link->adapter_unit;
adapter_t *z = &seadata[unit];
int x = splbio ();
if (! (scb->xfer->flags & SCSI_NOMASK))
printf ("sea%d/%d/%d (%s%d) timed out\n", unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
scb->xfer->sc_link->device->name,
scb->xfer->sc_link->dev_unit);
/* If it has been through before, then a previous abort has failed,
* don't try abort again. */
if (! (scb->flags & SCB_ABORTED)) {
sea_abort (z, scb);
/* 2 seconds for the abort */
timeout (sea_timeout, (caddr_t)scb, 2*hz);
scb->flags |= (SCB_ABORTED | SCB_TIMECHK);
} else {
/* abort timed out */
scb->flags |= SCB_ABORTED;
scb->xfer->retries = 0;
sea_done (z, scb);
}
splx (x);
}
/*
* Wait until REQ goes down. This is needed for some devices (CDROMs)
* after every MSGOUT, MSGIN, CMDOUT, STATIN request.
* Return true if REQ deassert found.
*/
static inline int sea_wait_for_req_deassert (adapter_t *z, int cnt, char *msg)
{
asm ("
1: testb $0x10, %2
jz 2f
loop 1b
2:"
: "=c" (cnt) /* output */
: "0" (cnt), "m" (*z->STATUS)); /* input */
if (! cnt) {
PRINT (("sea%d (%s) timeout waiting for !REQ\n",
z->sc_link.adapter_unit, msg));
return (0);
}
/* PRINT (("sea_wait_for_req_deassert %s count=%d\n", msg, cnt)); */
return (1);
}
/*
* Establish I_T_L or I_T_L_Q nexus for new or existing command
* including ARBITRATION, SELECTION, and initial message out
* for IDENTIFY and queue messages.
* Return 1 if selection succeded.
*/
int sea_select (volatile adapter_t *z, scb_t *scb)
{
/* Start arbitration. */
*z->CONTROL = z->parity | CMD_INTR;
*z->DATA = z->scsi_id;
*z->CONTROL = CMD_START_ARB | z->parity;
/* Wait for arbitration to complete. */
WAITFOR (*z->STATUS & STAT_ARB_CMPL, "arbitration");
if (! (*z->STATUS & STAT_ARB_CMPL)) {
if (*z->STATUS & STAT_SEL) {
printf ("sea: arbitration lost\n");
scb->flags |= SCB_ERROR;
} else {
printf ("sea: arbitration timeout\n");
scb->flags |= SCB_TIMEOUT;
}
*z->CONTROL = CMD_INTR | z->parity;
return (0);
}
DELAY (1);
*z->DATA = (1 << scb->xfer->sc_link->target) | z->scsi_id;
*z->CONTROL = sea_select_cmd | CMD_SEL | z->parity;
DELAY (2);
/* Wait for a bsy from target.
* If the target is not present on the bus, we get
* the timeout. Don't PRINT any message -- it's not an error. */
WAITFOR (*z->STATUS & STAT_BSY, 0);
if (! (*z->STATUS & STAT_BSY)) {
/* The target does not respond. Not an error, though. */
PRINT (("sea%d/%d/%d target does not respond\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
*z->CONTROL = CMD_INTR | z->parity;
scb->flags |= SCB_TIMEOUT;
return (0);
}
/* Try to make the target to take a message from us.
* Should start a MSGOUT phase. */
*z->CONTROL = sea_select_cmd | z->parity;
DELAY (15);
WAITFOR (*z->STATUS & STAT_REQ, 0);
if (z->type == CTLR_FUTURE_DOMAIN)
*z->CONTROL = CMD_INTR | z->parity | CMD_DRVR_ENABLE;
WAITFOR (*z->STATUS & STAT_REQ, 0);
if (! (*z->STATUS & STAT_REQ)) {
PRINT (("sea%d/%d/%d timeout waiting for REQ\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
scb->flags |= SCB_ERROR;
*z->CONTROL = CMD_INTR | z->parity;
return (0);
}
/* Check for phase mismatch. FD 885 always seems to get this wrong! */
if ((*z->STATUS & PHASE_MASK) != PHASE_MSGOUT && z->type != CTLR_FUTURE_DOMAIN) {
PRINT (("sea%d/%d/%d waiting for MSGOUT: invalid phase %s\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
PHASE_NAME (*z->STATUS & PHASE_MASK)));
scb->flags |= SCB_ERROR;
*z->CONTROL = CMD_INTR | z->parity;
return (0);
}
/* Allow disconnects. (except for FD controllers) */
if (z->type == CTLR_SEAGATE) {
*z->CONTROL = CMD_DRVR_ENABLE | z->parity;
*z->DATA = MSG_IDENTIFY (scb->xfer->sc_link->lun);
WAITREQ (&z->target[scb->xfer->sc_link->target], msgout, 1000);
}
*z->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | z->parity;
SET_BUSY (z, scb);
return (1);
}
int sea_reselect (adapter_t *z)
{
scb_t *q = 0, *prev = 0;
u_char msg, target_mask, lun;
again:
/* Wait for a device to win the reselection phase. */
/* Signals this by asserting the I/O signal. */
if ((*z->STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) !=
(STAT_SEL | STAT_IO))
return (0);
/* The data bus contains original initiator id ORed with target id. */
/* See that we really are the initiator. */
target_mask = *z->DATA;
if (! (target_mask & z->scsi_id)) {
PRINT (("sea%d reselect not for me: mask=0x%x, status=%b\n",
z->sc_link.adapter_unit, target_mask,
*z->STATUS, STAT_BITS));
goto again;
}
/* Find target who won. */
/* Host responds by asserting the BSY signal. */
/* Target should respond by deasserting the SEL signal. */
target_mask &= ~z->scsi_id;
*z->CONTROL = CMD_DRVR_ENABLE | CMD_BSY | z->parity | CMD_INTR;
WAITFOR (! (*z->STATUS & STAT_SEL), "reselection acknowledge");
/* Remove the busy status. */
/* Target should set the MSGIN phase. */
*z->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | z->parity;
WAITFOR (*z->STATUS & STAT_REQ, "identify message");
/* Hope we get an IDENTIFY message. */
msg = sea_msg_input (z);
if (MSG_ISIDENT (msg)) {
/* Find the command corresponding to the I_T_L or I_T_L_Q
* nexus we just restablished, and remove it from
* the disconnected queue. */
lun = (msg & 7);
for (q=z->disconnected_queue; q; prev=q, q=q->next) {
if (target_mask != (1 << q->xfer->sc_link->target))
continue;
if (lun != q->xfer->sc_link->lun)
continue;
if (prev)
prev->next = q->next;
else
z->disconnected_queue = q->next;
q->next = 0;
PRINT (("sea%d/%d/%d reselect done\n",
z->sc_link.adapter_unit,
ffs (target_mask) - 1, lun));
sea_information_transfer (z, q);
WAITFOR (! (*z->STATUS & STAT_BSY), "reselect !busy");
return (1);
}
} else
printf ("sea%d reselect: expecting IDENTIFY, got 0x%x\n",
z->sc_link.adapter_unit, msg);
/* Since we have an established nexus that we can't
* do anything with, we must abort it. */
sea_send_abort (z);
PRINT (("sea%d reselect aborted\n", z->sc_link.adapter_unit));
WAITFOR (! (*z->STATUS & STAT_BSY), "bus free after reselect abort");
goto again;
}
/*
* Send an abort to the target.
* Return 1 success, 0 on failure.
* Called on splbio level.
*/
int sea_abort (adapter_t *z, scb_t *scb)
{
scb_t *q, **prev;
/* If the command hasn't been issued yet, we simply remove it
* from the issue queue. */
prev = &z->queue;
for (q=z->queue; q; q=q->next) {
if (scb == q) {
(*prev) = q->next;
q->next = 0;
return (1);
}
prev = &q->next;
}
/* If the command is currently disconnected from the bus,
* we reconnect the I_T_L or I_T_L_Q nexus associated with it,
* go into message out, and send an abort message. */
for (q=z->disconnected_queue; q; q=q->next) {
if (scb != q)
continue;
if (! sea_select (z, scb))
return (0);
sea_send_abort (z);
prev = &z->disconnected_queue;
for (q=z->disconnected_queue; q; q=q->next) {
if (scb == q) {
*prev = q->next;
q->next = 0;
/* Set some type of error result
* for the operation. */
return (1);
}
prev = &q->next;
}
}
/* Command not found in any queue. */
return (0);
}
/*
* The task accomplished, mark the i/o control block as done.
* Always called with interrupts disabled.
*/
void sea_done (adapter_t *z, scb_t *scb)
{
struct scsi_xfer *xs = scb->xfer;
if (scb->flags & SCB_TIMECHK)
untimeout (sea_timeout, (caddr_t) scb);
/* How much of the buffer was not touched. */
xs->resid = scb->datalen;
if (scb->flags != SCB_ACTIVE && ! (xs->flags & SCSI_ERR_OK))
if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED))
xs->error = XS_TIMEOUT;
else if (scb->flags & SCB_ERROR)
xs->error = XS_DRIVER_STUFFUP;
else if (scb->flags & SCB_TBUSY)
xs->error = XS_BUSY;
else if (scb->flags & SCB_SENSE)
xs->error = XS_SENSE;
xs->flags |= ITSDONE;
/* Free the control block. */
scb->next = z->free_scb;
z->free_scb = scb;
scb->flags = SCB_FREE;
/* If there were none, wake anybody waiting for one to come free,
* starting with queued entries. */
if (! scb->next)
wakeup ((caddr_t) &z->free_scb);
scsi_done (xs);
}
/*
* Wait for completion of command in polled mode.
* Always called with interrupts masked out.
*/
int sea_poll (adapter_t *z, scb_t *scb)
{
int count;
for (count=0; count<30; ++count) {
DELAY (1000); /* delay for a while */
sea_start (z); /* retry operation */
if (scb->xfer->flags & ITSDONE)
return (1); /* all is done */
if (scb->flags & SCB_TIMEOUT)
return (0); /* no target present */
}
return (0);
}
/*
* Send data to the target.
*/
void sea_data_output (adapter_t *z, u_char **pdata, u_long *plen)
{
volatile u_char *data = *pdata;
volatile u_long len = *plen;
#ifdef SEA_BLINDTRANSFER
if (len && !(len % BLOCK_SIZE)) {
while (len) {
WAITFOR10 (*z->STATUS & STAT_REQ, "blind block read");
asm("
shr $2, %%ecx;
cld;
rep;
movsl; " : :
"D" (z->DATA), "S" (data), "c" (BLOCK_SIZE) :
"cx", "si", "di" );
data += BLOCK_SIZE;
len -= BLOCK_SIZE;
}
} else {
#endif
asm ("cld
1: movb (%%ebx), %%al
xorb $1, %%al
testb $0xf, %%al
jnz 2f
testb $0x10, %%al
jz 1b
lodsb
movb %%al, (%%edi)
loop 1b
2:"
: "=S" (data), "=c" (len) /* output */
: "D" (z->DATA), "b" (z->STATUS), /* input */
"0" (data), "1" (len)
: "eax", "ebx", "edi"); /* clobbered */
#ifdef SEA_BLINDTRANSFER
}
#endif
PRINT (("sea (DATAOUT) send %ld bytes\n", *plen - len));
*plen = len;
*pdata = data;
}
/*
* Receive data from the target.
*/
void sea_data_input (adapter_t *z, u_char **pdata, u_long *plen)
{
volatile u_char *data = *pdata;
volatile u_long len = *plen;
#ifdef SEA_BLINDTRANSFER
if (len && !(len % BLOCK_SIZE)) {
while (len) {
WAITFOR10 (*z->STATUS & STAT_REQ, "blind block read");
asm("
shr $2, %%ecx;
cld;
rep;
movsl; " : :
"S" (z->DATA), "D" (data), "c" (BLOCK_SIZE) :
"cx", "si", "di" );
data += BLOCK_SIZE;
len -= BLOCK_SIZE;
}
} else {
#endif
if (len >= 512) {
asm (" cld
1: movb (%%esi), %%al
xorb $5, %%al
testb $0xf, %%al
jnz 2f
testb $0x10, %%al
jz 1b
movb (%%ebx), %%al
stosb
loop 1b
2:"
: "=D" (data), "=c" (len) /* output */
: "b" (z->DATA), "S" (z->STATUS),
"0" (data), "1" (len) /* input */
: "eax", "ebx", "esi"); /* clobbered */
} else {
asm (" cld
1: movb (%%esi), %%al
xorb $5, %%al
testb $0xf, %%al
jnz 2f
testb $0x10, %%al
jz 1b
movb (%%ebx), %%al
stosb
movb $1000, %%al
3: testb $0x10, (%%esi)
jz 4f
dec %%al
jnz 3b
4: loop 1b
2:"
: "=D" (data), "=c" (len) /* output */
: "b" (z->DATA), "S" (z->STATUS),
"0" (data), "1" (len) /* input */
: "eax", "ebx", "esi"); /* clobbered */
}
#ifdef SEA_BLINDTRANSFER
}
#endif
PRINT (("sea (DATAIN) got %ld bytes\n", *plen - len));
*plen = len;
*pdata = data;
}
/*
* Send the command to the target.
*/
void sea_cmd_output (target_t *t, u_char *cmd, int cmdlen)
{
adapter_t *z = t->adapter;
PRINT (("sea%d send command (%d bytes) ", z->sc_link.adapter_unit,
cmdlen));
PRINT (("%x", *cmd));
*z->DATA = *cmd++;
if (z->type == CTLR_SEAGATE)
WAITREQ (t, cmdout1, 10000);
--cmdlen;
while (cmdlen) {
/* Check for target disconnect. */
u_char sts = *z->STATUS;
if (! (sts & STAT_BSY))
break;
/* Check for phase mismatch. FD 885 seems to get this wrong! */
if ((sts & PHASE_MASK) != PHASE_CMDOUT && z->type != CTLR_FUTURE_DOMAIN) {
printf ("sea: sea_cmd_output: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
return;
}
/* Wait for REQ. */
if (! (sts & STAT_REQ))
continue;
PRINT (("-%x", *cmd));
*z->DATA = *cmd++;
if (z->type == CTLR_SEAGATE)
WAITREQ (t, cmdout, 1000);
--cmdlen;
}
PRINT (("\n"));
}
/*
* Send the message to the target.
*/
void sea_send_abort (adapter_t *z)
{
u_char sts;
*z->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | CMD_ATTN | z->parity;
/* Wait for REQ, after which the phase bits will be valid. */
WAITFOR (*z->STATUS & STAT_REQ, "abort message");
sts = *z->STATUS;
if (! (sts & STAT_REQ))
goto ret;
/* Check for phase mismatch. */
if ((sts & PHASE_MASK) != PHASE_MSGOUT) {
printf ("sea: sending MSG_ABORT: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
goto ret;
}
*z->DATA = MSG_ABORT;
sea_wait_for_req_deassert (z, 1000, "MSG_OUTPUT");
PRINT (("sea%d send abort message\n", z->sc_link.adapter_unit));
ret:
*z->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | z->parity;
}
/*
* Get the message from the target.
* Return the length of the received message.
*/
u_char sea_msg_input (adapter_t *z)
{
u_char sts, msg;
/* Wait for REQ, after which the phase bits will be valid. */
WAITFOR (*z->STATUS & STAT_REQ, "message input");
sts = *z->STATUS;
if (! (sts & STAT_REQ))
return (MSG_ABORT);
/* Check for phase mismatch.
* Reached if the target decides that it has finished the transfer. */
if ((sts & PHASE_MASK) != PHASE_MSGIN) {
printf ("sea: sea_msg_input: invalid phase %s\n",
PHASE_NAME (sts & PHASE_MASK));
return (MSG_ABORT);
}
/* Do actual transfer from SCSI bus to/from memory. */
msg = *z->DATA;
sea_wait_for_req_deassert (z, 1000, "MSG_INPUT");
PRINT (("sea%d (MSG_INPUT) got 0x%x\n", z->sc_link.adapter_unit, msg));
return (msg);
}
/*
* Send request-sense op to the target.
* Return 1 success, 0 on failure.
* Called on splbio level.
*/
int sea_sense (adapter_t *z, scb_t *scb)
{
u_char cmd[6], status, msg, *data;
u_long len;
/* Wait for target to disconnect. */
WAITFOR (! (*z->STATUS & STAT_BSY), "sense bus free");
if (*z->STATUS & STAT_BSY)
return (0);
/* Select the target again. */
if (! sea_select (z, scb))
return (0);
/* Wait for CMDOUT phase. */
WAITFOR (*z->STATUS & STAT_REQ, "sense CMDOUT");
if (! (*z->STATUS & STAT_REQ) ||
(*z->STATUS & PHASE_MASK) != PHASE_CMDOUT)
return (0);
/* Send command. */
len = sizeof (scb->xfer->sense);
cmd[0] = REQUEST_SENSE;
cmd[1] = scb->xfer->sc_link->lun << 5;
cmd[2] = 0;
cmd[3] = 0;
cmd[4] = len;
cmd[5] = 0;
sea_cmd_output (&z->target[scb->xfer->sc_link->target],
cmd, sizeof (cmd));
/* Wait for DATAIN phase. */
WAITFOR (*z->STATUS & STAT_REQ, "sense DATAIN");
if (! (*z->STATUS & STAT_REQ) ||
(*z->STATUS & PHASE_MASK) != PHASE_DATAIN)
return (0);
data = (u_char*) &scb->xfer->sense;
sea_data_input (z, &data, &len);
PRINT (("sea%d sense %x-%x-%x-%x-%x-%x-%x-%x\n",
z->sc_link.adapter_unit, scb->xfer->sense.error_code,
scb->xfer->sense.ext.extended.segment,
scb->xfer->sense.ext.extended.flags,
scb->xfer->sense.ext.extended.info[0],
scb->xfer->sense.ext.extended.info[1],
scb->xfer->sense.ext.extended.info[2],
scb->xfer->sense.ext.extended.info[3],
scb->xfer->sense.ext.extended.extra_len));
/* Wait for STATIN phase. */
WAITFOR (*z->STATUS & STAT_REQ, "sense STATIN");
if (! (*z->STATUS & STAT_REQ) ||
(*z->STATUS & PHASE_MASK) != PHASE_STATIN)
return (0);
status = *z->DATA;
/* Wait for MSGIN phase. */
WAITFOR (*z->STATUS & STAT_REQ, "sense MSGIN");
if (! (*z->STATUS & STAT_REQ) ||
(*z->STATUS & PHASE_MASK) != PHASE_MSGIN)
return (0);
msg = *z->DATA;
if (status != 0 || msg != 0)
printf ("sea%d: bad sense status=0x%x, msg=0x%x\n",
z->sc_link.adapter_unit, status, msg);
return (1);
}
/*
* Do the transfer. We know we are connected. Update the flags,
* call sea_done when task accomplished. Dialog controlled by the target.
* Always called with interrupts disabled.
*/
void sea_information_transfer (adapter_t *z, scb_t *scb)
{
u_char *data = scb->data; /* current data buffer */
u_long datalen = scb->datalen; /* current data transfer size */
target_t *t = &z->target[scb->xfer->sc_link->target];
register u_char sts;
u_char msg;
while ((sts = *z->STATUS) & STAT_BSY) {
/* We only have a valid SCSI phase when REQ is asserted. */
if (! (sts & STAT_REQ))
continue;
if (sts & STAT_PARITY) {
int target = scb->xfer->sc_link->target;
if (++z->target[target].perrcnt <= 8)
printf ("sea%d/%d/%d parity error\n",
z->sc_link.adapter_unit, target,
scb->xfer->sc_link->lun);
if (z->target[target].perrcnt == 8)
printf ("sea%d/%d/%d too many parity errors, not logging any more\n",
z->sc_link.adapter_unit, target,
scb->xfer->sc_link->lun);
}
switch (sts & PHASE_MASK) {
case PHASE_DATAOUT:
if (datalen <= 0) {
printf ("sea%d/%d/%d data length underflow\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun);
/* send zero byte */
*z->DATA = 0;
break;
}
sea_data_output (z, &data, &datalen);
break;
case PHASE_DATAIN:
if (datalen <= 0) {
/* Get extra data. Some devices (e.g. CDROMs)
* use fixed-length blocks (e.g. 2k),
* even if we need less. */
PRINT (("@"));
sts = *z->DATA;
break;
}
sea_data_input (z, &data, &datalen);
break;
case PHASE_CMDOUT:
sea_cmd_output (t, (u_char*) scb->xfer->cmd,
scb->xfer->cmdlen);
break;
case PHASE_STATIN:
scb->xfer->status = *z->DATA;
if (z->type == CTLR_SEAGATE)
WAITREQ (t, statin, 2000);
PRINT (("sea%d/%d/%d (STATIN) got 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
(u_char) scb->xfer->status));
break;
case PHASE_MSGOUT:
/* Send no-op message. */
*z->DATA = MSG_NOP;
sea_wait_for_req_deassert (z, 1000, "MSGOUT");
PRINT (("sea%d/%d/%d (MSGOUT) send NOP\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
break;
case PHASE_MSGIN:
/* Don't handle multi-byte messages here, because they
* should not be present here. */
msg = *z->DATA;
sea_wait_for_req_deassert (z, 2000, "MSGIN");
PRINT (("sea%d/%d/%d (MSGIN) got 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun, msg));
switch (msg) {
case MSG_COMMAND_COMPLETE:
scb->data = data;
scb->datalen = datalen;
/* In the case of check-condition status,
* perform the request-sense op. */
switch (scb->xfer->status & 0x1e) {
case SCSI_CHECK:
if (sea_sense (z, scb))
scb->flags = SCB_SENSE;
break;
case SCSI_BUSY:
scb->flags = SCB_TBUSY;
break;
}
goto done;
case MSG_ABORT:
printf ("sea: command aborted by target\n");
scb->flags = SCB_ABORTED;
goto done;
case MSG_MESSAGE_REJECT:
printf ("sea: message rejected\n");
scb->flags = SCB_ABORTED;
goto done;
case MSG_DISCONNECT:
scb->next = z->disconnected_queue;
z->disconnected_queue = scb;
if (! z->irq && ! z->timeout_active) {
timeout (sea_tick, z, 1);
z->timeout_active = 1;
}
PRINT (("sea%d/%d/%d disconnected\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun));
goto ret;
case MSG_SAVE_POINTERS:
scb->data = data;
scb->datalen = datalen;
break;
case MSG_RESTORE_POINTERS:
data = scb->data;
datalen = scb->datalen;
break;
default:
printf ("sea%d/%d/%d unknown message: 0x%x\n",
z->sc_link.adapter_unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun, msg);
break;
}
break;
default:
printf ("sea: unknown phase: %b\n", sts, STAT_BITS);
break;
}
}
printf ("sea%d/%d/%d unexpected target disconnect\n",
z->sc_link.adapter_unit, scb->xfer->sc_link->target,
scb->xfer->sc_link->lun);
scb->flags = SCB_ERROR;
done:
CLEAR_BUSY (z, scb);
sea_done (z, scb);
ret:
*z->CONTROL = CMD_INTR | z->parity;
}
#endif /* NSEA */
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