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Commit 1fbcea01 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
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[PATCH] first pass at seagate st-02 for 2.5

parent 147f09f5
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Showing with 359 additions and 467 deletions
drivers/scsi/seagate.c
View file @ 1fbcea01
......@@ -265,16 +265,14 @@ MODULE_LICENSE("GPL");
#define WRITE_CONTROL(d) { isa_writeb((d), st0x_cr_sr); }
#define WRITE_DATA(d) { isa_writeb((d), st0x_dr); }
void
st0x_setup (char *str, int *ints)
static void st0x_setup (char *str, int *ints)
{
controller_type = SEAGATE;
base_address = ints[1];
irq = ints[2];
}
void
tmc8xx_setup (char *str, int *ints)
static void tmc8xx_setup (char *str, int *ints)
{
controller_type = FD;
base_address = ints[1];
......@@ -389,8 +387,14 @@ static void __init borken_init (void)
{
register int count = 0, start = jiffies + 1, stop = start + 25;
while (time_before (jiffies, start)) ;
for (; time_before (jiffies, stop); ++count) ;
/* FIXME: There may be a better approach, this is a straight port for
now */
preempt_disable();
while (time_before (jiffies, start))
cpu_relax();
for (; time_before (jiffies, stop); ++count)
cpu_relax();
preempt_enable();
/*
* Ok, we now have a count for .25 seconds. Convert to a
......@@ -406,8 +410,9 @@ static inline void borken_wait (void)
{
register int count;
for (count = borken_calibration; count && (STATUS & STAT_REQ);
--count) ;
for (count = borken_calibration; count && (STATUS & STAT_REQ); --count)
cpu_relax();
#if (DEBUG & DEBUG_BORKEN)
if (count)
printk ("scsi%d : borken timeout\n", hostno);
......@@ -462,14 +467,9 @@ int __init seagate_st0x_detect (Scsi_Host_Template * tpnt)
* space for the on-board RAM instead.
*/
for (i = 0;
i < (sizeof (seagate_bases) / sizeof (unsigned int)); ++i)
for (i = 0; i < (sizeof (seagate_bases) / sizeof (unsigned int)); ++i)
for (j = 0; !base_address && j < NUM_SIGNATURES; ++j)
if (isa_check_signature
(seagate_bases[i] + signatures[j].offset,
signatures[j].signature,
signatures[j].length)) {
if (isa_check_signature(seagate_bases[i] + signatures[j].offset, signatures[j].signature, signatures[j].length)) {
base_address = seagate_bases[i];
controller_type = signatures[j].type;
}
......@@ -480,40 +480,36 @@ int __init seagate_st0x_detect (Scsi_Host_Template * tpnt)
tpnt->name = (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR;
if (!base_address) {
DANY ("ST0x / TMC-8xx not detected.\n");
printk(KERN_INFO "seagate: ST0x/TMC-8xx not detected.\n");
return 0;
}
st0x_cr_sr =
base_address + (controller_type == SEAGATE ? 0x1a00 : 0x1c00);
st0x_cr_sr = base_address + (controller_type == SEAGATE ? 0x1a00 : 0x1c00);
st0x_dr = st0x_cr_sr + 0x200;
DANY ("%s detected. Base address = %x, cr = %x, dr = %x\n",
DANY("%s detected. Base address = %x, cr = %x, dr = %x\n",
tpnt->name, base_address, st0x_cr_sr, st0x_dr);
/*
* At all times, we will use IRQ 5. Should also check for IRQ3 if we
* loose our first interrupt.
/*
* At all times, we will use IRQ 5. Should also check for IRQ3
* if we loose our first interrupt.
*/
instance = scsi_register (tpnt, 0);
if (instance == NULL)
return 0;
hostno = instance->host_no;
if (request_irq (irq, do_seagate_reconnect_intr, SA_INTERRUPT,
(controller_type == SEAGATE) ? "seagate" : "tmc-8xx",
instance)) {
printk ("scsi%d : unable to allocate IRQ%d\n", hostno, irq);
if (request_irq (irq, do_seagate_reconnect_intr, SA_INTERRUPT, (controller_type == SEAGATE) ? "seagate" : "tmc-8xx", instance)) {
printk(KERN_ERR "scsi%d : unable to allocate IRQ%d\n", hostno, irq);
return 0;
}
instance->irq = irq;
instance->io_port = base_address;
#ifdef SLOW_RATE
printk (KERN_INFO "Calibrating borken timer... ");
borken_init ();
printk (" %d cycles per transfer\n", borken_calibration);
printk(KERN_INFO "Calibrating borken timer... ");
borken_init();
printk(" %d cycles per transfer\n", borken_calibration);
#endif
printk (KERN_INFO "This is one second... ");
{
int clock;
......@@ -559,12 +555,11 @@ int __init seagate_st0x_detect (Scsi_Host_Template * tpnt)
return 1;
}
const char *
seagate_st0x_info (struct Scsi_Host *shpnt)
static const char *seagate_st0x_info (struct Scsi_Host *shpnt)
{
static char buffer[64];
sprintf (buffer, "%s at irq %d, address 0x%05X",
snprintf(buffer, 64, "%s at irq %d, address 0x%05X",
(controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR,
irq, base_address);
return buffer;
......@@ -640,36 +635,29 @@ static void seagate_reconnect_intr (int irq, void *dev_id, struct pt_regs *regs)
int temp;
Scsi_Cmnd *SCtmp;
DPRINTK (PHASE_RESELECT, "scsi%d : seagate_reconnect_intr() called\n",
hostno);
DPRINTK (PHASE_RESELECT, "scsi%d : seagate_reconnect_intr() called\n", hostno);
if (!should_reconnect)
printk ("scsi%d: unexpected interrupt.\n", hostno);
printk(KERN_WARNING "scsi%d: unexpected interrupt.\n", hostno);
else {
should_reconnect = 0;
DPRINTK (PHASE_RESELECT, "scsi%d : internal_command("
"%d, %08x, %08x, RECONNECT_NOW\n", hostno,
current_target, current_data, current_bufflen);
DPRINTK (PHASE_RESELECT, "scsi%d : internal_command(%d, %08x, %08x, RECONNECT_NOW\n",
hostno, current_target, current_data, current_bufflen);
temp =
internal_command (current_target, current_lun, current_cmnd,
current_data, current_bufflen,
RECONNECT_NOW);
temp = internal_command (current_target, current_lun, current_cmnd, current_data, current_bufflen, RECONNECT_NOW);
if (msg_byte (temp) != DISCONNECT) {
if (msg_byte(temp) != DISCONNECT) {
if (done_fn) {
DPRINTK (PHASE_RESELECT,
"scsi%d : done_fn(%d,%08x)", hostno,
hostno, temp);
DPRINTK(PHASE_RESELECT, "scsi%d : done_fn(%d,%08x)", hostno, hostno, temp);
if (!SCint)
panic ("SCint == NULL in seagate");
SCtmp = SCint;
SCint = NULL;
SCtmp->result = temp;
done_fn (SCtmp);
done_fn(SCtmp);
} else
printk ("done_fn() not defined.\n");
printk(KERN_ERR "done_fn() not defined.\n");
}
}
}
......@@ -687,7 +675,7 @@ static void seagate_reconnect_intr (int irq, void *dev_id, struct pt_regs *regs)
static int recursion_depth = 0;
int seagate_st0x_queue_command (Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
static int seagate_st0x_queue_command (Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
{
int result, reconnect;
Scsi_Cmnd *SCtmp;
......@@ -696,53 +684,49 @@ int seagate_st0x_queue_command (Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
done_fn = done;
current_target = SCpnt->target;
current_lun = SCpnt->lun;
(const void *) current_cmnd = SCpnt->cmnd;
current_cmnd = SCpnt->cmnd;
current_data = (unsigned char *) SCpnt->request_buffer;
current_bufflen = SCpnt->request_bufflen;
SCint = SCpnt;
if (recursion_depth)
return 0;
return 1;
recursion_depth++;
do {
#ifdef LINKED
/*
/*
* Set linked command bit in control field of SCSI command.
*/
current_cmnd[SCpnt->cmd_len] |= 0x01;
if (linked_connected) {
DPRINTK (DEBUG_LINKED,
"scsi%d : using linked commands, current I_T_L nexus is ",
hostno);
if ((linked_target == current_target)
&& (linked_lun == current_lun)) {
DPRINTK (DEBUG_LINKED, "correct\n");
DPRINTK (DEBUG_LINKED, "scsi%d : using linked commands, current I_T_L nexus is ", hostno);
if (linked_target == current_target && linked_lun == current_lun)
{
DPRINTK(DEBUG_LINKED, "correct\n");
reconnect = LINKED_RIGHT;
} else {
DPRINTK (DEBUG_LINKED, "incorrect\n");
DPRINTK(DEBUG_LINKED, "incorrect\n");
reconnect = LINKED_WRONG;
}
} else
#endif /* LINKED */
reconnect = CAN_RECONNECT;
result =
internal_command (SCint->target, SCint->lun, SCint->cmnd,
SCint->request_buffer,
SCint->request_bufflen, reconnect);
if (msg_byte (result) == DISCONNECT)
result = internal_command(SCint->target, SCint->lun, SCint->cmnd,
SCint->request_buffer, SCint->request_bufflen, reconnect);
if (msg_byte(result) == DISCONNECT)
break;
SCtmp = SCint;
SCint = NULL;
SCtmp->result = result;
done_fn (SCtmp);
done_fn(SCtmp);
}
while (SCint);
recursion_depth--;
return 0;
}
int seagate_st0x_command (Scsi_Cmnd * SCpnt)
static int seagate_st0x_command(Scsi_Cmnd * SCpnt)
{
return internal_command (SCpnt->target, SCpnt->lun, SCpnt->cmnd,
SCpnt->request_buffer, SCpnt->request_bufflen,
......@@ -755,17 +739,12 @@ static int internal_command (unsigned char target, unsigned char lun,
unsigned char *data = NULL;
struct scatterlist *buffer = NULL;
int clock, temp, nobuffs = 0, done = 0, len = 0;
unsigned long flags;
#ifdef DEBUG
int transfered = 0, phase = 0, newphase;
#endif
register unsigned char status_read;
unsigned char tmp_data, tmp_control, status = 0, message = 0;
unsigned transfersize = 0, underflow = 0;
#ifdef SLOW_RATE
int borken = (int) SCint->device->borken; /* Does the current target require
Very Slow I/O ? */
......@@ -775,36 +754,36 @@ static int internal_command (unsigned char target, unsigned char lun,
st0x_aborted = 0;
#if (DEBUG & PRINT_COMMAND)
printk ("scsi%d : target = %d, command = ", hostno, target);
print_command ((unsigned char *) cmnd);
printk("scsi%d : target = %d, command = ", hostno, target);
print_command((unsigned char *) cmnd);
#endif
#if (DEBUG & PHASE_RESELECT)
switch (reselect) {
case RECONNECT_NOW:
printk ("scsi%d : reconnecting\n", hostno);
printk("scsi%d : reconnecting\n", hostno);
break;
#ifdef LINKED
case LINKED_RIGHT:
printk ("scsi%d : connected, can reconnect\n", hostno);
printk("scsi%d : connected, can reconnect\n", hostno);
break;
case LINKED_WRONG:
printk ("scsi%d : connected to wrong target, can reconnect\n",
printk("scsi%d : connected to wrong target, can reconnect\n",
hostno);
break;
#endif
case CAN_RECONNECT:
printk ("scsi%d : allowed to reconnect\n", hostno);
printk("scsi%d : allowed to reconnect\n", hostno);
break;
default:
printk ("scsi%d : not allowed to reconnect\n", hostno);
printk("scsi%d : not allowed to reconnect\n", hostno);
}
#endif
if (target == (controller_type == SEAGATE ? 7 : 6))
return DID_BAD_TARGET;
/*
/*
* We work it differently depending on if this is is "the first time,"
* or a reconnect. If this is a reselect phase, then SEL will
* be asserted, and we must skip selection / arbitration phases.
......@@ -813,46 +792,38 @@ static int internal_command (unsigned char target, unsigned char lun,
switch (reselect) {
case RECONNECT_NOW:
DPRINTK (PHASE_RESELECT, "scsi%d : phase RESELECT \n", hostno);
/*
* At this point, we should find the logical or of our ID and the original
* target's ID on the BUS, with BSY, SEL, and I/O signals asserted.
/*
* At this point, we should find the logical or of our ID
* and the original target's ID on the BUS, with BSY, SEL,
* and I/O signals asserted.
*
* After ARBITRATION phase is completed, only SEL, BSY, and the
* target ID are asserted. A valid initiator ID is not on the bus
* until IO is asserted, so we must wait for that.
* After ARBITRATION phase is completed, only SEL, BSY,
* and the target ID are asserted. A valid initiator ID
* is not on the bus until IO is asserted, so we must wait
* for that.
*/
ULOOP (100 * 1000) {
temp = STATUS;
if ((temp & STAT_IO) && !(temp & STAT_BSY))
break;
if (TIMEOUT) {
DPRINTK (PHASE_RESELECT,
"scsi%d : RESELECT timed out while waiting for IO .\n",
hostno);
DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for IO .\n", hostno);
return (DID_BAD_INTR << 16);
}
}
/*
* After I/O is asserted by the target, we can read our ID and its
* ID off of the BUS.
/*
* After I/O is asserted by the target, we can read our ID
* and its ID off of the BUS.
*/
if (!
((temp =
DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) {
DPRINTK (PHASE_RESELECT,
"scsi%d : detected reconnect request to different target.\n"
"\tData bus = %d\n", hostno, temp);
if (!((temp = DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) {
DPRINTK (PHASE_RESELECT, "scsi%d : detected reconnect request to different target.\n\tData bus = %d\n", hostno, temp);
return (DID_BAD_INTR << 16);
}
if (!(temp & (1 << current_target))) {
printk
("scsi%d : Unexpected reselect interrupt. Data bus = %d\n",
hostno, temp);
printk(KERN_WARNING "scsi%d : Unexpected reselect interrupt. Data bus = %d\n", hostno, temp);
return (DID_BAD_INTR << 16);
}
......@@ -862,9 +833,10 @@ static int internal_command (unsigned char target, unsigned char lun,
len = current_bufflen; /* WDE add */
nobuffs = current_nobuffs;
/*
* We have determined that we have been selected. At this point,
* we must respond to the reselection by asserting BSY ourselves
/*
* We have determined that we have been selected. At this
* point, we must respond to the reselection by asserting
* BSY ourselves
*/
#if 1
......@@ -873,9 +845,9 @@ static int internal_command (unsigned char target, unsigned char lun,
WRITE_CONTROL (BASE_CMD | CMD_BSY);
#endif
/*
* The target will drop SEL, and raise BSY, at which time we must drop
* BSY.
/*
* The target will drop SEL, and raise BSY, at which time
* we must drop BSY.
*/
ULOOP (100 * 1000) {
......@@ -883,38 +855,30 @@ static int internal_command (unsigned char target, unsigned char lun,
break;
if (TIMEOUT) {
WRITE_CONTROL (BASE_CMD | CMD_INTR);
DPRINTK (PHASE_RESELECT,
"scsi%d : RESELECT timed out while waiting for SEL.\n",
hostno);
DPRINTK (PHASE_RESELECT, "scsi%d : RESELECT timed out while waiting for SEL.\n", hostno);
return (DID_BAD_INTR << 16);
}
}
WRITE_CONTROL (BASE_CMD);
/*
* At this point, we have connected with the target and can get
* on with our lives.
/*
* At this point, we have connected with the target
* and can get on with our lives.
*/
break;
case CAN_RECONNECT:
#ifdef LINKED
/*
* This is a bletcherous hack, just as bad as the Unix #! interpreter stuff.
* If it turns out we are using the wrong I_T_L nexus, the easiest way to deal
* with it is to go into our INFORMATION TRANSFER PHASE code, send a ABORT
/*
* This is a bletcherous hack, just as bad as the Unix #!
* interpreter stuff. If it turns out we are using the wrong
* I_T_L nexus, the easiest way to deal with it is to go into
* our INFORMATION TRANSFER PHASE code, send a ABORT
* message on MESSAGE OUT phase, and then loop back to here.
*/
connect_loop:
connect_loop:
#endif
DPRINTK (PHASE_BUS_FREE, "scsi%d : phase = BUS FREE \n", hostno);
DPRINTK (PHASE_BUS_FREE, "scsi%d : phase = BUS FREE \n",
hostno);
/*
/*
* BUS FREE PHASE
*
* On entry, we make sure that the BUS is in a BUS FREE
......@@ -927,22 +891,19 @@ static int internal_command (unsigned char target, unsigned char lun,
#error FIXME: this is broken: we may not use jiffies here - we are under cli(). It will hardlock.
clock = jiffies + ST0X_BUS_FREE_DELAY;
while (((STATUS | STATUS | STATUS) &
(STAT_BSY | STAT_SEL)) &&
(!st0x_aborted) && time_before (jiffies, clock)) ;
while (((STATUS | STATUS | STATUS) & (STAT_BSY | STAT_SEL)) && (!st0x_aborted) && time_before (jiffies, clock))
cpu_relax();
if (time_after (jiffies, clock))
return retcode (DID_BUS_BUSY);
else if (st0x_aborted)
return retcode (st0x_aborted);
#endif
DPRINTK (PHASE_SELECTION, "scsi%d : phase = SELECTION\n",
hostno);
DPRINTK (PHASE_SELECTION, "scsi%d : phase = SELECTION\n", hostno);
clock = jiffies + ST0X_SELECTION_DELAY;
/*
/*
* Arbitration/selection procedure :
* 1. Disable drivers
* 2. Write HOST adapter address bit
......@@ -954,12 +915,10 @@ static int internal_command (unsigned char target, unsigned char lun,
*/
#ifdef ARBITRATE
save_flags (flags);
cli ();
WRITE_CONTROL (0);
WRITE_DATA ((controller_type == SEAGATE) ? 0x80 : 0x40);
WRITE_CONTROL (CMD_START_ARB);
restore_flags (flags);
/* FIXME: verify host lock is always held here */
WRITE_CONTROL(0);
WRITE_DATA((controller_type == SEAGATE) ? 0x80 : 0x40);
WRITE_CONTROL(CMD_START_ARB);
ULOOP (ST0X_SELECTION_DELAY * 10000) {
status_read = STATUS;
......@@ -968,40 +927,31 @@ static int internal_command (unsigned char target, unsigned char lun,
if (st0x_aborted) /* FIXME: What? We are going to do something even after abort? */
break;
if (TIMEOUT || (status_read & STAT_SEL)) {
printk
("scsi%d : arbitration lost or timeout.\n",
hostno);
printk(KERN_WARNING "scsi%d : arbitration lost or timeout.\n", hostno);
WRITE_CONTROL (BASE_CMD);
return retcode (DID_NO_CONNECT);
}
}
DPRINTK (PHASE_SELECTION, "scsi%d : arbitration complete\n",
hostno);
DPRINTK (PHASE_SELECTION, "scsi%d : arbitration complete\n", hostno);
#endif
/*
* When the SCSI device decides that we're gawking at it, it will
* respond by asserting BUSY on the bus.
/*
* When the SCSI device decides that we're gawking at it,
* it will respond by asserting BUSY on the bus.
*
* Note : the Seagate ST-01/02 product manual says that we should
* twiddle the DATA register before the control register. However,
* this does not work reliably so we do it the other way around.
* Note : the Seagate ST-01/02 product manual says that we
* should twiddle the DATA register before the control
* register. However, this does not work reliably so we do
* it the other way around.
*
* Probably could be a problem with arbitration too, we really should
* try this with a SCSI protocol or logic analyzer to see what is
* going on.
* Probably could be a problem with arbitration too, we
* really should try this with a SCSI protocol or logic
* analyzer to see what is going on.
*/
tmp_data =
(unsigned char) ((1 << target) |
(controller_type ==
SEAGATE ? 0x80 : 0x40));
tmp_control =
BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | (reselect ? CMD_ATTN
: 0);
save_flags (flags);
cli ();
tmp_data = (unsigned char) ((1 << target) | (controller_type == SEAGATE ? 0x80 : 0x40));
tmp_control = BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | (reselect ? CMD_ATTN : 0);
/* FIXME: verify host lock is always held here */
#ifdef OLDCNTDATASCEME
#ifdef SWAPCNTDATA
WRITE_CONTROL (tmp_control);
......@@ -1018,22 +968,20 @@ static int internal_command (unsigned char target, unsigned char lun,
WRITE_CONTROL (tmp_control); /* -- pavel@ucw.cz */
#endif
restore_flags (flags);
ULOOP (250 * 1000) {
if (st0x_aborted) {
/*
* If we have been aborted, and we have a command in progress, IE the
* target still has BSY asserted, then we will reset the bus, and
* notify the midlevel driver to expect sense.
/*
* If we have been aborted, and we have a
* command in progress, IE the target
* still has BSY asserted, then we will
* reset the bus, and notify the midlevel
* driver to expect sense.
*/
WRITE_CONTROL (BASE_CMD);
if (STATUS & STAT_BSY) {
printk
("scsi%d : BST asserted after we've been aborted.\n",
hostno);
seagate_st0x_reset (NULL, 0);
printk(KERN_WARNING "scsi%d : BST asserted after we've been aborted.\n", hostno);
seagate_st0x_bus_reset(NULL);
return retcode (DID_RESET);
}
return retcode (st0x_aborted);
......@@ -1041,26 +989,20 @@ static int internal_command (unsigned char target, unsigned char lun,
if (STATUS & STAT_BSY)
break;
if (TIMEOUT) {
DPRINTK (PHASE_SELECTION,
"scsi%d : NO CONNECT with target %d, stat = %x \n",
hostno, target, STATUS);
DPRINTK (PHASE_SELECTION, "scsi%d : NO CONNECT with target %d, stat = %x \n", hostno, target, STATUS);
return retcode (DID_NO_CONNECT);
}
}
/* Establish current pointers. Take into account scatter / gather */
/* Establish current pointers. Take into account scatter / gather */
if ((nobuffs = SCint->use_sg)) {
#if (DEBUG & DEBUG_SG)
{
int i;
printk
("scsi%d : scatter gather requested, using %d buffers.\n",
hostno, nobuffs);
printk("scsi%d : scatter gather requested, using %d buffers.\n", hostno, nobuffs);
for (i = 0; i < nobuffs; ++i)
printk
("scsi%d : buffer %d address = %p length = %d\n",
printk("scsi%d : buffer %d address = %p length = %d\n",
hostno, i,
page_address(buffer[i].page) + buffer[i].offset,
buffer[i].length);
......@@ -1069,11 +1011,9 @@ static int internal_command (unsigned char target, unsigned char lun,
buffer = (struct scatterlist *) SCint->buffer;
len = buffer->length;
data = (unsigned char *) buffer->address;
data = page_address(buffer->page) + buffer->offset;
} else {
DPRINTK (DEBUG_SG,
"scsi%d : scatter gather not requested.\n",
hostno);
DPRINTK (DEBUG_SG, "scsi%d : scatter gather not requested.\n", hostno);
buffer = NULL;
len = SCint->request_bufflen;
data = (unsigned char *) SCint->request_buffer;
......@@ -1091,28 +1031,24 @@ static int internal_command (unsigned char target, unsigned char lun,
#endif
} /* end of switch(reselect) */
/*
/*
* There are several conditions under which we wish to send a message :
* 1. When we are allowing disconnect / reconnect, and need to establish
* the I_T_L nexus via an IDENTIFY with the DiscPriv bit set.
* 1. When we are allowing disconnect / reconnect, and need to
* establish the I_T_L nexus via an IDENTIFY with the DiscPriv bit
* set.
*
* 2. When we are doing linked commands, are have the wrong I_T_L nexus
* established and want to send an ABORT message.
* 2. When we are doing linked commands, are have the wrong I_T_L
* nexus established and want to send an ABORT message.
*/
/* GCC does not like an ifdef inside a macro, so do it the hard way. */
/* GCC does not like an ifdef inside a macro, so do it the hard way. */
#ifdef LINKED
WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE |
(((reselect == CAN_RECONNECT)
|| (reselect == LINKED_WRONG)
)? CMD_ATTN : 0));
WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT)|| (reselect == LINKED_WRONG))? CMD_ATTN : 0));
#else
WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE |
(((reselect == CAN_RECONNECT)
)? CMD_ATTN : 0));
WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE | (((reselect == CAN_RECONNECT))? CMD_ATTN : 0));
#endif
/*
/*
* INFORMATION TRANSFER PHASE
*
* The nasty looking read / write inline assembler loops we use for
......@@ -1130,72 +1066,63 @@ static int internal_command (unsigned char target, unsigned char lun,
transfersize = SCint->transfersize;
underflow = SCint->underflow;
/*
/*
* Now, we poll the device for status information,
* and handle any requests it makes. Note that since we are unsure of
* how much data will be flowing across the system, etc and cannot
* make reasonable timeouts, that we will instead have the midlevel
* driver handle any timeouts that occur in this phase.
* and handle any requests it makes. Note that since we are unsure
* of how much data will be flowing across the system, etc and
* cannot make reasonable timeouts, that we will instead have the
* midlevel driver handle any timeouts that occur in this phase.
*/
while (((status_read = STATUS) & STAT_BSY) && !st0x_aborted && !done) {
#ifdef PARITY
if (status_read & STAT_PARITY) {
printk ("scsi%d : got parity error\n", hostno);
printk(KERN_ERR "scsi%d : got parity error\n", hostno);
st0x_aborted = DID_PARITY;
}
#endif
if (status_read & STAT_REQ) {
#if ((DEBUG & PHASE_ETC) == PHASE_ETC)
if ((newphase = (status_read & REQ_MASK)) != phase) {
phase = newphase;
switch (phase) {
case REQ_DATAOUT:
printk ("scsi%d : phase = DATA OUT\n",
hostno);
printk ("scsi%d : phase = DATA OUT\n", hostno);
break;
case REQ_DATAIN:
printk ("scsi%d : phase = DATA IN\n",
hostno);
printk ("scsi%d : phase = DATA IN\n", hostno);
break;
case REQ_CMDOUT:
printk
("scsi%d : phase = COMMAND OUT\n",
hostno);
("scsi%d : phase = COMMAND OUT\n", hostno);
break;
case REQ_STATIN:
printk ("scsi%d : phase = STATUS IN\n",
hostno);
printk ("scsi%d : phase = STATUS IN\n", hostno);
break;
case REQ_MSGOUT:
printk
("scsi%d : phase = MESSAGE OUT\n",
hostno);
("scsi%d : phase = MESSAGE OUT\n", hostno);
break;
case REQ_MSGIN:
printk ("scsi%d : phase = MESSAGE IN\n",
hostno);
printk ("scsi%d : phase = MESSAGE IN\n", hostno);
break;
default:
printk ("scsi%d : phase = UNKNOWN\n",
hostno);
printk ("scsi%d : phase = UNKNOWN\n", hostno);
st0x_aborted = DID_ERROR;
}
}
#endif
switch (status_read & REQ_MASK) {
case REQ_DATAOUT:
/*
* If we are in fast mode, then we simply splat the data out
* in word-sized chunks as fast as we can.
/*
* If we are in fast mode, then we simply splat
* the data out in word-sized chunks as fast as
* we can.
*/
if (!len) {
#if 0
printk
("scsi%d: underflow to target %d lun %d \n",
hostno, target, lun);
printk("scsi%d: underflow to target %d lun %d \n", hostno, target, lun);
st0x_aborted = DID_ERROR;
fast = 0;
#endif
......@@ -1216,7 +1143,7 @@ static int internal_command (unsigned char target, unsigned char lun,
SCint->transfersize, len,
data);
/* SJT: Start. Fast Write */
/* SJT: Start. Fast Write */
#ifdef SEAGATE_USE_ASM
__asm__ ("cld\n\t"
#ifdef FAST32
......@@ -1241,14 +1168,11 @@ static int internal_command (unsigned char target, unsigned char lun,
#else /* SEAGATE_USE_ASM */
{
#ifdef FAST32
unsigned int *iop =
phys_to_virt (st0x_dr);
const unsigned int *dp =
(unsigned int *) data;
unsigned int *iop = phys_to_virt (st0x_dr);
const unsigned int *dp =(unsigned int *) data;
int xferlen = transfersize >> 2;
#else
unsigned char *iop =
phys_to_virt (st0x_dr);
unsigned char *iop = phys_to_virt (st0x_dr);
const unsigned char *dp = data;
int xferlen = transfersize;
#endif
......@@ -1259,13 +1183,12 @@ static int internal_command (unsigned char target, unsigned char lun,
/* SJT: End */
len -= transfersize;
data += transfersize;
DPRINTK (DEBUG_FAST,
"scsi%d : FAST transfer complete len = %d data = %08x\n",
hostno, len, data);
DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
} else {
/*
* We loop as long as we are in a data out phase, there is data to send,
* and BSY is still active.
/*
* We loop as long as we are in a
* data out phase, there is data to
* send, and BSY is still active.
*/
/* SJT: Start. Slow Write. */
......@@ -1335,8 +1258,7 @@ static int internal_command (unsigned char target, unsigned char lun,
--nobuffs;
++buffer;
len = buffer->length;
data =
(unsigned char *) buffer->address;
data = page_address(buffer->page) + buffer->offset;
DPRINTK (DEBUG_SG,
"scsi%d : next scatter-gather buffer len = %d address = %08x\n",
hostno, len, data);
......@@ -1349,13 +1271,9 @@ static int internal_command (unsigned char target, unsigned char lun,
#if (DEBUG & (PHASE_DATAIN))
transfered += len;
#endif
for (;
len
&& (STATUS & (REQ_MASK | STAT_REQ))
== (REQ_DATAIN | STAT_REQ);
--len) {
for (; len && (STATUS & (REQ_MASK | STAT_REQ)) == (REQ_DATAIN | STAT_REQ); --len) {
*data++ = DATA;
borken_wait ();
borken_wait();
}
#if (DEBUG & (PHASE_DATAIN))
transfered -= len;
......@@ -1421,19 +1339,15 @@ static int internal_command (unsigned char target, unsigned char lun,
len -= transfersize;
data += transfersize;
#if (DEBUG & PHASE_DATAIN)
printk ("scsi%d: transfered += %d\n",
hostno, transfersize);
printk ("scsi%d: transfered += %d\n", hostno, transfersize);
transfered += transfersize;
#endif
DPRINTK (DEBUG_FAST,
"scsi%d : FAST transfer complete len = %d data = %08x\n",
hostno, len, data);
DPRINTK (DEBUG_FAST, "scsi%d : FAST transfer complete len = %d data = %08x\n", hostno, len, data);
} else {
#if (DEBUG & PHASE_DATAIN)
printk ("scsi%d: transfered += %d\n",
hostno, len);
printk ("scsi%d: transfered += %d\n", hostno, len);
transfered += len; /* Assume we'll transfer it all, then
subtract what we *didn't* transfer */
#endif
......@@ -1508,8 +1422,7 @@ static int internal_command (unsigned char target, unsigned char lun,
#endif /* SEAGATE_USE_ASM */
/* SJT: End. */
#if (DEBUG & PHASE_DATAIN)
printk ("scsi%d: transfered -= %d\n",
hostno, len);
printk ("scsi%d: transfered -= %d\n", hostno, len);
transfered -= len; /* Since we assumed all of Len got *
transfered, correct our mistake */
#endif
......@@ -1519,26 +1432,17 @@ static int internal_command (unsigned char target, unsigned char lun,
--nobuffs;
++buffer;
len = buffer->length;
data =
(unsigned char *) buffer->address;
DPRINTK (DEBUG_SG,
"scsi%d : next scatter-gather buffer len = %d address = %08x\n",
hostno, len, data);
data = page_address(buffer->page) + buffer->offset;
DPRINTK (DEBUG_SG, "scsi%d : next scatter-gather buffer len = %d address = %08x\n", hostno, len, data);
}
break;
case REQ_CMDOUT:
while (((status_read = STATUS) & STAT_BSY) &&
((status_read & REQ_MASK) == REQ_CMDOUT))
if (status_read & STAT_REQ) {
WRITE_DATA (*
(const unsigned char
*) cmnd);
cmnd =
1 +
(const unsigned char *)
cmnd;
WRITE_DATA (*(const unsigned char *) cmnd);
cmnd = 1 + (const unsigned char *)cmnd;
#ifdef SLOW_RATE
if (borken)
borken_wait ();
......@@ -1551,23 +1455,21 @@ static int internal_command (unsigned char target, unsigned char lun,
break;
case REQ_MSGOUT:
/*
* We can only have sent a MSG OUT if we requested to do this
* by raising ATTN. So, we must drop ATTN.
/*
* We can only have sent a MSG OUT if we
* requested to do this by raising ATTN.
* So, we must drop ATTN.
*/
WRITE_CONTROL (BASE_CMD | CMD_DRVR_ENABLE);
/*
* If we are reconnecting, then we must send an IDENTIFY message in
* response to MSGOUT.
/*
* If we are reconnecting, then we must
* send an IDENTIFY message in response
* to MSGOUT.
*/
switch (reselect) {
case CAN_RECONNECT:
WRITE_DATA (IDENTIFY (1, lun));
DPRINTK (PHASE_RESELECT | PHASE_MSGOUT,
"scsi%d : sent IDENTIFY message.\n",
hostno);
DPRINTK (PHASE_RESELECT | PHASE_MSGOUT, "scsi%d : sent IDENTIFY message.\n", hostno);
break;
#ifdef LINKED
case LINKED_WRONG:
......@@ -1575,23 +1477,19 @@ static int internal_command (unsigned char target, unsigned char lun,
linked_connected = 0;
reselect = CAN_RECONNECT;
goto connect_loop;
DPRINTK (PHASE_MSGOUT | DEBUG_LINKED,
"scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n",
hostno);
DPRINTK (PHASE_MSGOUT | DEBUG_LINKED, "scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n", hostno);
#endif /* LINKED */
DPRINTK (DEBUG_LINKED, "correct\n");
default:
WRITE_DATA (NOP);
printk
("scsi%d : target %d requested MSGOUT, sent NOP message.\n",
hostno, target);
printk("scsi%d : target %d requested MSGOUT, sent NOP message.\n", hostno, target);
}
break;
case REQ_MSGIN:
switch (message = DATA) {
case DISCONNECT:
DANY ("seagate: deciding to disconnect\n");
DANY("seagate: deciding to disconnect\n");
should_reconnect = 1;
current_data = data; /* WDE add */
current_buffer = buffer;
......@@ -1601,9 +1499,7 @@ static int internal_command (unsigned char target, unsigned char lun,
linked_connected = 0;
#endif
done = 1;
DPRINTK ((PHASE_RESELECT | PHASE_MSGIN),
"scsi%d : disconnected.\n",
hostno);
DPRINTK ((PHASE_RESELECT | PHASE_MSGIN), "scsi%d : disconnected.\n", hostno);
break;
#ifdef LINKED
......@@ -1611,18 +1507,14 @@ static int internal_command (unsigned char target, unsigned char lun,
case LINKED_FLG_CMD_COMPLETE:
#endif
case COMMAND_COMPLETE:
/*
/*
* Note : we should check for underflow here.
*/
DPRINTK (PHASE_MSGIN,
"scsi%d : command complete.\n",
hostno);
DPRINTK(PHASE_MSGIN, "scsi%d : command complete.\n", hostno);
done = 1;
break;
case ABORT:
DPRINTK (PHASE_MSGIN,
"scsi%d : abort message.\n",
hostno);
DPRINTK(PHASE_MSGIN, "scsi%d : abort message.\n", hostno);
done = 1;
break;
case SAVE_POINTERS:
......@@ -1630,9 +1522,7 @@ static int internal_command (unsigned char target, unsigned char lun,
current_bufflen = len; /* WDE add */
current_data = data; /* WDE mod */
current_nobuffs = nobuffs;
DPRINTK (PHASE_MSGIN,
"scsi%d : pointers saved.\n",
hostno);
DPRINTK (PHASE_MSGIN, "scsi%d : pointers saved.\n", hostno);
break;
case RESTORE_POINTERS:
buffer = current_buffer;
......@@ -1640,90 +1530,86 @@ static int internal_command (unsigned char target, unsigned char lun,
data = current_data; /* WDE mod */
len = current_bufflen;
nobuffs = current_nobuffs;
DPRINTK (PHASE_MSGIN,
"scsi%d : pointers restored.\n",
hostno);
DPRINTK(PHASE_MSGIN, "scsi%d : pointers restored.\n", hostno);
break;
default:
/*
* IDENTIFY distinguishes itself from the other messages by setting the
* high byte. [FIXME: should not this read "the high bit"? - pavel@ucw.cz]
/*
* IDENTIFY distinguishes itself
* from the other messages by
* setting the high bit.
*
* Note : we need to handle at least one outstanding command per LUN,
* and need to hash the SCSI command for that I_T_L nexus based on the
* known ID (at this point) and LUN.
* Note : we need to handle at
* least one outstanding command
* per LUN, and need to hash the
* SCSI command for that I_T_L
* nexus based on the known ID
* (at this point) and LUN.
*/
if (message & 0x80) {
DPRINTK (PHASE_MSGIN,
"scsi%d : IDENTIFY message received from id %d, lun %d.\n",
hostno, target,
message & 7);
DPRINTK (PHASE_MSGIN, "scsi%d : IDENTIFY message received from id %d, lun %d.\n", hostno, target, message & 7);
} else {
/*
* We should go into a MESSAGE OUT phase, and send a MESSAGE_REJECT
* if we run into a message that we don't like. The seagate driver
* needs some serious restructuring first though.
/*
* We should go into a
* MESSAGE OUT phase, and
* send a MESSAGE_REJECT
* if we run into a message
* that we don't like. The
* seagate driver needs
* some serious
* restructuring first
* though.
*/
DPRINTK (PHASE_MSGIN,
"scsi%d : unknown message %d from target %d.\n",
hostno, message,
target);
DPRINTK (PHASE_MSGIN, "scsi%d : unknown message %d from target %d.\n", hostno, message, target);
}
}
break;
default:
printk ("scsi%d : unknown phase.\n", hostno);
printk(KERN_ERR "scsi%d : unknown phase.\n", hostno);
st0x_aborted = DID_ERROR;
} /* end of switch (status_read &
REQ_MASK) */
} /* end of switch (status_read & REQ_MASK) */
#ifdef SLOW_RATE
/*
* I really don't care to deal with borken devices in each single
* byte transfer case (ie, message in, message out, status), so
* I'll do the wait here if necessary.
/*
* I really don't care to deal with borken devices in
* each single byte transfer case (ie, message in,
* message out, status), so I'll do the wait here if
* necessary.
*/
if (borken)
borken_wait ();
if(borken)
borken_wait();
#endif
} /* if(status_read & STAT_REQ) ends */
} /* while(((status_read = STATUS)...)
ends */
} /* while(((status_read = STATUS)...) ends */
DPRINTK (PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT,
"scsi%d : Transfered %d bytes\n", hostno, transfered);
DPRINTK(PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT, "scsi%d : Transfered %d bytes\n", hostno, transfered);
#if (DEBUG & PHASE_EXIT)
#if 0 /* Doesn't work for scatter/gather */
printk ("Buffer : \n");
for (i = 0; i < 20; ++i)
printk ("%02x ", ((unsigned char *) data)[i]); /* WDE mod */
printk ("\n");
printk("Buffer : \n");
for(i = 0; i < 20; ++i)
printk("%02x ", ((unsigned char *) data)[i]); /* WDE mod */
printk("\n");
#endif
printk ("scsi%d : status = ", hostno);
print_status (status);
printk (" message = %02x\n", message);
printk("scsi%d : status = ", hostno);
print_status(status);
printk(" message = %02x\n", message);
#endif
/* We shouldn't reach this until *after* BSY has been deasserted */
/* We shouldn't reach this until *after* BSY has been deasserted */
#ifdef LINKED
else
{
/*
* Fix the message byte so that unsuspecting high level drivers don't
* puke when they see a LINKED COMMAND message in place of the COMMAND
* COMPLETE they may be expecting. Shouldn't be necessary, but it's
* better to be on the safe side.
/*
* Fix the message byte so that unsuspecting high level drivers
* don't puke when they see a LINKED COMMAND message in place of
* the COMMAND COMPLETE they may be expecting. Shouldn't be
* necessary, but it's better to be on the safe side.
*
* A non LINKED* message byte will indicate that the command completed,
* and we are now disconnected.
* A non LINKED* message byte will indicate that the command
* completed, and we are now disconnected.
*/
switch (message) {
......@@ -1733,33 +1619,27 @@ static int internal_command (unsigned char target, unsigned char lun,
linked_target = current_target;
linked_lun = current_lun;
linked_connected = 1;
DPRINTK (DEBUG_LINKED,
"scsi%d : keeping I_T_L nexus established"
"for linked command.\n", hostno);
DPRINTK (DEBUG_LINKED, "scsi%d : keeping I_T_L nexus established for linked command.\n", hostno);
/* We also will need to adjust status to accommodate intermediate
conditions. */
if ((status == INTERMEDIATE_GOOD) ||
(status == INTERMEDIATE_C_GOOD))
if ((status == INTERMEDIATE_GOOD) || (status == INTERMEDIATE_C_GOOD))
status = GOOD;
break;
/*
* We should also handle what are "normal" termination messages
* here (ABORT, BUS_DEVICE_RESET?, and COMMAND_COMPLETE individually,
* and flake if things aren't right.
/*
* We should also handle what are "normal" termination
* messages here (ABORT, BUS_DEVICE_RESET?, and
* COMMAND_COMPLETE individually, and flake if things
* aren't right.
*/
default:
DPRINTK (DEBUG_LINKED,
"scsi%d : closing I_T_L nexus.\n", hostno);
DPRINTK (DEBUG_LINKED, "scsi%d : closing I_T_L nexus.\n", hostno);
linked_connected = 0;
}
}
#endif /* LINKED */
if (should_reconnect) {
DPRINTK (PHASE_RESELECT,
"scsi%d : exiting seagate_st0x_queue_command()"
"with reconnect enabled.\n", hostno);
DPRINTK (PHASE_RESELECT, "scsi%d : exiting seagate_st0x_queue_command() with reconnect enabled.\n", hostno);
WRITE_CONTROL (BASE_CMD | CMD_INTR);
} else
WRITE_CONTROL (BASE_CMD);
......@@ -1770,7 +1650,7 @@ static int internal_command (unsigned char target, unsigned char lun,
static int seagate_st0x_abort (Scsi_Cmnd * SCpnt)
{
st0x_aborted = DID_ABORT;
return SCSI_ABORT_PENDING;
return SUCCESS;
}
#undef ULOOP
......@@ -1778,14 +1658,16 @@ static int seagate_st0x_abort (Scsi_Cmnd * SCpnt)
/*
* the seagate_st0x_reset function resets the SCSI bus
*
* May be called with SCpnt = NULL
*/
static int seagate_st0x_reset (Scsi_Cmnd * SCpnt, unsigned int reset_flags)
static int seagate_st0x_bus_reset(Scsi_Cmnd * SCpnt)
{
/* No timeouts - this command is going to fail because it was reset. */
/* No timeouts - this command is going to fail because it was reset. */
DANY ("scsi%d: Reseting bus... ", hostno);
/* assert RESET signal on SCSI bus. */
/* assert RESET signal on SCSI bus. */
WRITE_CONTROL (BASE_CMD | CMD_RST);
udelay (20 * 1000);
......@@ -1794,7 +1676,17 @@ static int seagate_st0x_reset (Scsi_Cmnd * SCpnt, unsigned int reset_flags)
st0x_aborted = DID_RESET;
DANY ("done.\n");
return SCSI_RESET_WAKEUP;
return SUCCESS;
}
static int seagate_st0x_host_reset(Scsi_Cmnd *SCpnt)
{
return FAILED;
}
static int seagate_st0x_device_reset(Scsi_Cmnd *SCpnt)
{
return FAILED;
}
/* Eventually this will go into an include file, but this will be later */
......
drivers/scsi/seagate.h
View file @ 1fbcea01
......@@ -7,30 +7,30 @@
*/
#ifndef _SEAGATE_H
#define SEAGATE_H
/*
$Header
*/
#ifndef ASM
int seagate_st0x_detect(Scsi_Host_Template *);
int seagate_st0x_command(Scsi_Cmnd *);
int seagate_st0x_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
#define SEAGATE_H
static int seagate_st0x_detect(Scsi_Host_Template *);
static int seagate_st0x_command(Scsi_Cmnd *);
static int seagate_st0x_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
static int seagate_st0x_abort(Scsi_Cmnd *);
const char *seagate_st0x_info(struct Scsi_Host *);
static int seagate_st0x_reset(Scsi_Cmnd *, unsigned int);
static const char *seagate_st0x_info(struct Scsi_Host *);
static int seagate_st0x_bus_reset(Scsi_Cmnd *);
static int seagate_st0x_device_reset(Scsi_Cmnd *);
static int seagate_st0x_host_reset(Scsi_Cmnd *);
#define SEAGATE_ST0X { detect: seagate_st0x_detect, \
info: seagate_st0x_info, \
command: seagate_st0x_command, \
queuecommand: seagate_st0x_queue_command, \
abort: seagate_st0x_abort, \
reset: seagate_st0x_reset, \
eh_abort_handler: seagate_st0x_abort, \
eh_bus_reset_handler: seagate_st0x_bus_reset, \
eh_host_reset_handler: seagate_st0x_host_reset, \
eh_device_reset_handler:seagate_st0x_device_reset, \
can_queue: 1, \
this_id: 7, \
sg_tablesize: SG_ALL, \
cmd_per_lun: 1, \
use_clustering: DISABLE_CLUSTERING}
#endif /* ASM */
#endif /* _SEAGATE_H */
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