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/************************************************************
* *
* Linux EATA SCSI PIO driver *
* *
* based on the CAM document CAM / 89 - 004 rev . 2.0 c , *
* DPT ' s driver kit , some internal documents and source , *
* and several other Linux scsi drivers and kernel docs . *
* *
* The driver currently : *
* - supports all EATA - PIO boards *
* - only supports DASD devices *
* *
* ( c ) 1993 - 96 Michael Neuffer , Alfred Arnold *
* neuffer @ goofy . zdv . uni - mainz . de *
* a . arnold @ kfa - juelich . de *
* *
2008-10-27 23:16:36 +08:00
* Updated 2002 by Alan Cox < alan @ lxorguk . ukuu . org . uk > for *
* Linux 2.5 . x and the newer locking and error handling *
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* *
* This program is free software ; you can redistribute it *
* and / or modify it under the terms of the GNU General *
* Public License as published by the Free Software *
* Foundation ; either version 2 of the License , or *
* ( at your option ) any later version . *
* *
* This program is distributed in the hope that it will be *
* useful , but WITHOUT ANY WARRANTY ; without even the *
* implied warranty of MERCHANTABILITY or FITNESS FOR A *
* PARTICULAR PURPOSE . See the GNU General Public License *
* for more details . *
* *
* You should have received a copy of the GNU General *
* Public License along with this kernel ; if not , write to *
* the Free Software Foundation , Inc . , 675 Mass Ave , *
* Cambridge , MA 0213 9 , USA . *
* *
* For the avoidance of doubt the " preferred form " of this *
* code is one which is in an open non patent encumbered *
* format . Where cryptographic key signing forms part of *
* the process of creating an executable the information *
* including keys needed to generate an equivalently *
* functional executable are deemed to be part of the *
* source code are deemed to be part of the source code . *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* last change : 2002 / 11 / 02 OS : Linux 2.5 .45 *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
# include <linux/module.h>
# include <linux/kernel.h>
# include <linux/string.h>
# include <linux/ioport.h>
# include <linux/in.h>
# include <linux/pci.h>
# include <linux/proc_fs.h>
# include <linux/interrupt.h>
# include <linux/blkdev.h>
# include <linux/spinlock.h>
# include <linux/delay.h>
# include <asm/io.h>
# include <scsi/scsi.h>
# include <scsi/scsi_cmnd.h>
# include <scsi/scsi_device.h>
# include <scsi/scsi_host.h>
# include "eata_generic.h"
# include "eata_pio.h"
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static unsigned int ISAbases [ MAXISA ] = {
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0x1F0 , 0x170 , 0x330 , 0x230
} ;
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static unsigned int ISAirqs [ MAXISA ] = {
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14 , 12 , 15 , 11
} ;
static unsigned char EISAbases [ ] = {
1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 ,
1 , 1 , 1 , 1 , 1 , 1 , 1 , 1
} ;
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static unsigned int registered_HBAs ;
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static struct Scsi_Host * last_HBA ;
static struct Scsi_Host * first_HBA ;
static unsigned char reg_IRQ [ 16 ] ;
static unsigned char reg_IRQL [ 16 ] ;
static unsigned long int_counter ;
static unsigned long queue_counter ;
static struct scsi_host_template driver_template ;
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static int eata_pio_show_info ( struct seq_file * m , struct Scsi_Host * shost )
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{
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seq_printf ( m , " EATA (Extended Attachment) PIO driver version: "
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" %d.%d%s \n " , VER_MAJOR , VER_MINOR , VER_SUB ) ;
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seq_printf ( m , " queued commands: %10ld \n "
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" processed interrupts:%10ld \n " , queue_counter , int_counter ) ;
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seq_printf ( m , " \n scsi%-2d: HBA %.10s \n " ,
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shost - > host_no , SD ( shost ) - > name ) ;
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seq_printf ( m , " Firmware revision: v%s \n " ,
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SD ( shost ) - > revision ) ;
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seq_puts ( m , " IO: PIO \n " ) ;
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seq_printf ( m , " Base IO : %#.4x \n " , ( u32 ) shost - > base ) ;
seq_printf ( m , " Host Bus: %s \n " ,
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( SD ( shost ) - > bustype = = ' P ' ) ? " PCI " :
( SD ( shost ) - > bustype = = ' E ' ) ? " EISA " : " ISA " ) ;
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return 0 ;
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}
static int eata_pio_release ( struct Scsi_Host * sh )
{
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hostdata * hd = SD ( sh ) ;
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if ( sh - > irq & & reg_IRQ [ sh - > irq ] = = 1 )
free_irq ( sh - > irq , NULL ) ;
else
reg_IRQ [ sh - > irq ] - - ;
if ( SD ( sh ) - > channel = = 0 ) {
if ( sh - > io_port & & sh - > n_io_port )
release_region ( sh - > io_port , sh - > n_io_port ) ;
}
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/* At this point the PCI reference can go */
if ( hd - > pdev )
pci_dev_put ( hd - > pdev ) ;
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return 1 ;
}
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static void IncStat ( struct scsi_pointer * SCp , unsigned int Increment )
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{
SCp - > ptr + = Increment ;
if ( ( SCp - > this_residual - = Increment ) = = 0 ) {
if ( ( - - SCp - > buffers_residual ) = = 0 )
SCp - > Status = 0 ;
else {
SCp - > buffer + + ;
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SCp - > ptr = sg_virt ( SCp - > buffer ) ;
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SCp - > this_residual = SCp - > buffer - > length ;
}
}
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static irqreturn_t eata_pio_int_handler ( int irq , void * dev_id ) ;
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static irqreturn_t do_eata_pio_int_handler ( int irq , void * dev_id )
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{
unsigned long flags ;
struct Scsi_Host * dev = dev_id ;
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irqreturn_t ret ;
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spin_lock_irqsave ( dev - > host_lock , flags ) ;
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ret = eata_pio_int_handler ( irq , dev_id ) ;
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spin_unlock_irqrestore ( dev - > host_lock , flags ) ;
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return ret ;
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}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static irqreturn_t eata_pio_int_handler ( int irq , void * dev_id )
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{
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unsigned int eata_stat = 0xfffff ;
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struct scsi_cmnd * cmd ;
hostdata * hd ;
struct eata_ccb * cp ;
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unsigned long base ;
unsigned int x , z ;
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struct Scsi_Host * sh ;
unsigned short zwickel = 0 ;
unsigned char stat , odd ;
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irqreturn_t ret = IRQ_NONE ;
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for ( x = 1 , sh = first_HBA ; x < = registered_HBAs ; x + + , sh = SD ( sh ) - > prev )
{
if ( sh - > irq ! = irq )
continue ;
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if ( inb ( sh - > base + HA_RSTATUS ) & HA_SBUSY )
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continue ;
int_counter + + ;
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ret = IRQ_HANDLED ;
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hd = SD ( sh ) ;
cp = & hd - > ccb [ 0 ] ;
cmd = cp - > cmd ;
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base = cmd - > device - > host - > base ;
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do {
stat = inb ( base + HA_RSTATUS ) ;
if ( stat & HA_SDRQ ) {
if ( cp - > DataIn ) {
z = 256 ;
odd = 0 ;
while ( ( cmd - > SCp . Status ) & & ( ( z > 0 ) | | ( odd ) ) ) {
if ( odd ) {
* ( cmd - > SCp . ptr ) = zwickel > > 8 ;
IncStat ( & cmd - > SCp , 1 ) ;
odd = 0 ;
}
x = min_t ( unsigned int , z , cmd - > SCp . this_residual / 2 ) ;
insw ( base + HA_RDATA , cmd - > SCp . ptr , x ) ;
z - = x ;
IncStat ( & cmd - > SCp , 2 * x ) ;
if ( ( z > 0 ) & & ( cmd - > SCp . this_residual = = 1 ) ) {
zwickel = inw ( base + HA_RDATA ) ;
* ( cmd - > SCp . ptr ) = zwickel & 0xff ;
IncStat ( & cmd - > SCp , 1 ) ;
z - - ;
odd = 1 ;
}
}
while ( z > 0 ) {
zwickel = inw ( base + HA_RDATA ) ;
z - - ;
}
} else { /* cp->DataOut */
odd = 0 ;
z = 256 ;
while ( ( cmd - > SCp . Status ) & & ( ( z > 0 ) | | ( odd ) ) ) {
if ( odd ) {
zwickel + = * ( cmd - > SCp . ptr ) < < 8 ;
IncStat ( & cmd - > SCp , 1 ) ;
outw ( zwickel , base + HA_RDATA ) ;
z - - ;
odd = 0 ;
}
x = min_t ( unsigned int , z , cmd - > SCp . this_residual / 2 ) ;
outsw ( base + HA_RDATA , cmd - > SCp . ptr , x ) ;
z - = x ;
IncStat ( & cmd - > SCp , 2 * x ) ;
if ( ( z > 0 ) & & ( cmd - > SCp . this_residual = = 1 ) ) {
zwickel = * ( cmd - > SCp . ptr ) ;
zwickel & = 0xff ;
IncStat ( & cmd - > SCp , 1 ) ;
odd = 1 ;
}
}
while ( z > 0 | | odd ) {
outw ( zwickel , base + HA_RDATA ) ;
z - - ;
odd = 0 ;
}
}
}
}
while ( ( stat & HA_SDRQ ) | | ( ( stat & HA_SMORE ) & & hd - > moresupport ) ) ;
/* terminate handler if HBA goes busy again, i.e. transfers
* more data */
if ( stat & HA_SBUSY )
break ;
/* OK, this is quite stupid, but I haven't found any correct
* way to get HBA & SCSI status so far */
if ( ! ( inb ( base + HA_RSTATUS ) & HA_SERROR ) ) {
cmd - > result = ( DID_OK < < 16 ) ;
hd - > devflags | = ( 1 < < cp - > cp_id ) ;
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} else if ( hd - > devflags & ( 1 < < cp - > cp_id ) )
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cmd - > result = ( DID_OK < < 16 ) + 0x02 ;
else
cmd - > result = ( DID_NO_CONNECT < < 16 ) ;
if ( cp - > status = = LOCKED ) {
cp - > status = FREE ;
eata_stat = inb ( base + HA_RSTATUS ) ;
printk ( KERN_CRIT " eata_pio: int_handler, freeing locked " " queueslot \n " ) ;
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return ret ;
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}
# if DBG_INTR2
if ( stat ! = 0x50 )
printk ( KERN_DEBUG " stat: %#.2x, result: %#.8x \n " , stat , cmd - > result ) ;
# endif
cp - > status = FREE ; /* now we can release the slot */
cmd - > scsi_done ( cmd ) ;
}
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return ret ;
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}
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static inline unsigned int eata_pio_send_command ( unsigned long base , unsigned char command )
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{
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unsigned int loop = 50 ;
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while ( inb ( base + HA_RSTATUS ) & HA_SBUSY )
if ( - - loop = = 0 )
return 1 ;
/* Enable interrupts for HBA. It is not the best way to do it at this
* place , but I hope that it doesn ' t interfere with the IDE driver
* initialization this way */
outb ( HA_CTRL_8HEADS , base + HA_CTRLREG ) ;
outb ( command , base + HA_WCOMMAND ) ;
return 0 ;
}
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static int eata_pio_queue_lck ( struct scsi_cmnd * cmd ,
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void ( * done ) ( struct scsi_cmnd * ) )
{
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unsigned int x , y ;
unsigned long base ;
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hostdata * hd ;
struct Scsi_Host * sh ;
struct eata_ccb * cp ;
queue_counter + + ;
hd = HD ( cmd ) ;
sh = cmd - > device - > host ;
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base = sh - > base ;
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/* use only slot 0, as 2001 can handle only one cmd at a time */
y = x = 0 ;
if ( hd - > ccb [ y ] . status ! = FREE ) {
DBG ( DBG_QUEUE , printk ( KERN_EMERG " can_queue %d, x %d, y %d \n " , sh - > can_queue , x , y ) ) ;
# if DEBUG_EATA
panic ( KERN_EMERG " eata_pio: run out of queue slots cmdno:%ld " " intrno: %ld \n " , queue_counter , int_counter ) ;
# else
panic ( KERN_EMERG " eata_pio: run out of queue slots.... \n " ) ;
# endif
}
cp = & hd - > ccb [ y ] ;
memset ( cp , 0 , sizeof ( struct eata_ccb ) ) ;
cp - > status = USED ; /* claim free slot */
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DBG ( DBG_QUEUE , scmd_printk ( KERN_DEBUG , cmd ,
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" eata_pio_queue 0x%p, y %d \n " , cmd , y ) ) ;
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cmd - > scsi_done = ( void * ) done ;
if ( cmd - > sc_data_direction = = DMA_TO_DEVICE )
cp - > DataOut = 1 ; /* Output mode */
else
cp - > DataIn = 0 ; /* Input mode */
cp - > Interpret = ( cmd - > device - > id = = hd - > hostid ) ;
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cp - > cp_datalen = cpu_to_be32 ( scsi_bufflen ( cmd ) ) ;
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cp - > Auto_Req_Sen = 0 ;
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cp - > cp_reqDMA = 0 ;
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cp - > reqlen = 0 ;
cp - > cp_id = cmd - > device - > id ;
cp - > cp_lun = cmd - > device - > lun ;
cp - > cp_dispri = 0 ;
cp - > cp_identify = 1 ;
memcpy ( cp - > cp_cdb , cmd - > cmnd , COMMAND_SIZE ( * cmd - > cmnd ) ) ;
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cp - > cp_statDMA = 0 ;
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cp - > cp_viraddr = cp ;
cp - > cmd = cmd ;
cmd - > host_scribble = ( char * ) & hd - > ccb [ y ] ;
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if ( ! scsi_bufflen ( cmd ) ) {
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cmd - > SCp . buffers_residual = 1 ;
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cmd - > SCp . ptr = NULL ;
cmd - > SCp . this_residual = 0 ;
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cmd - > SCp . buffer = NULL ;
} else {
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cmd - > SCp . buffer = scsi_sglist ( cmd ) ;
cmd - > SCp . buffers_residual = scsi_sg_count ( cmd ) ;
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cmd - > SCp . ptr = sg_virt ( cmd - > SCp . buffer ) ;
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cmd - > SCp . this_residual = cmd - > SCp . buffer - > length ;
}
cmd - > SCp . Status = ( cmd - > SCp . this_residual ! = 0 ) ; /* TRUE as long as bytes
* are to transfer */
if ( eata_pio_send_command ( base , EATA_CMD_PIO_SEND_CP ) ) {
cmd - > result = DID_BUS_BUSY < < 16 ;
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scmd_printk ( KERN_NOTICE , cmd ,
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" eata_pio_queue pid 0x%p, HBA busy, "
" returning DID_BUS_BUSY, done. \n " , cmd ) ;
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done ( cmd ) ;
cp - > status = FREE ;
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return 0 ;
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}
/* FIXME: timeout */
while ( ! ( inb ( base + HA_RSTATUS ) & HA_SDRQ ) )
cpu_relax ( ) ;
outsw ( base + HA_RDATA , cp , hd - > cplen ) ;
outb ( EATA_CMD_PIO_TRUNC , base + HA_WCOMMAND ) ;
for ( x = 0 ; x < hd - > cppadlen ; x + + )
outw ( 0 , base + HA_RDATA ) ;
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DBG ( DBG_QUEUE , scmd_printk ( KERN_DEBUG , cmd ,
2011-04-04 21:42:14 +08:00
" Queued base %#.4lx cmd: 0x%p "
" slot %d irq %d \n " , sh - > base , cmd , y , sh - > irq ) ) ;
2005-04-17 06:20:36 +08:00
2007-09-20 22:15:27 +08:00
return 0 ;
2005-04-17 06:20:36 +08:00
}
2010-11-16 15:10:29 +08:00
static DEF_SCSI_QCMD ( eata_pio_queue )
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static int eata_pio_abort ( struct scsi_cmnd * cmd )
{
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unsigned int loop = 100 ;
2005-04-17 06:20:36 +08:00
2005-10-25 06:04:36 +08:00
DBG ( DBG_ABNORM , scmd_printk ( KERN_WARNING , cmd ,
2011-04-04 21:42:14 +08:00
" eata_pio_abort called pid: 0x%p \n " , cmd ) ) ;
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while ( inb ( cmd - > device - > host - > base + HA_RAUXSTAT ) & HA_ABUSY )
if ( - - loop = = 0 ) {
printk ( KERN_WARNING " eata_pio: abort, timeout error. \n " ) ;
return FAILED ;
}
if ( CD ( cmd ) - > status = = FREE ) {
DBG ( DBG_ABNORM , printk ( KERN_WARNING " Returning: SCSI_ABORT_NOT_RUNNING \n " ) ) ;
return FAILED ;
}
if ( CD ( cmd ) - > status = = USED ) {
DBG ( DBG_ABNORM , printk ( KERN_WARNING " Returning: SCSI_ABORT_BUSY \n " ) ) ;
/* We want to sleep a bit more here */
return FAILED ; /* SNOOZE */
}
if ( CD ( cmd ) - > status = = RESET ) {
printk ( KERN_WARNING " eata_pio: abort, command reset error. \n " ) ;
return FAILED ;
}
if ( CD ( cmd ) - > status = = LOCKED ) {
DBG ( DBG_ABNORM , printk ( KERN_WARNING " eata_pio: abort, queue slot " " locked. \n " ) ) ;
return FAILED ;
}
panic ( " eata_pio: abort: invalid slot status \n " ) ;
}
static int eata_pio_host_reset ( struct scsi_cmnd * cmd )
{
2006-09-19 02:18:34 +08:00
unsigned int x , limit = 0 ;
2005-04-17 06:20:36 +08:00
unsigned char success = 0 ;
struct scsi_cmnd * sp ;
struct Scsi_Host * host = cmd - > device - > host ;
2005-10-25 06:04:36 +08:00
DBG ( DBG_ABNORM , scmd_printk ( KERN_WARNING , cmd ,
2011-04-04 21:42:14 +08:00
" eata_pio_reset called \n " ) ) ;
2005-04-17 06:20:36 +08:00
2005-05-28 19:57:14 +08:00
spin_lock_irq ( host - > host_lock ) ;
2005-04-17 06:20:36 +08:00
if ( HD ( cmd ) - > state = = RESET ) {
printk ( KERN_WARNING " eata_pio_reset: exit, already in reset. \n " ) ;
2005-05-28 19:57:14 +08:00
spin_unlock_irq ( host - > host_lock ) ;
2005-04-17 06:20:36 +08:00
return FAILED ;
}
/* force all slots to be free */
for ( x = 0 ; x < cmd - > device - > host - > can_queue ; x + + ) {
if ( HD ( cmd ) - > ccb [ x ] . status = = FREE )
continue ;
sp = HD ( cmd ) - > ccb [ x ] . cmd ;
HD ( cmd ) - > ccb [ x ] . status = RESET ;
2011-04-04 21:42:14 +08:00
printk ( KERN_WARNING " eata_pio_reset: slot %d in reset. \n " , x ) ;
2005-04-17 06:20:36 +08:00
if ( sp = = NULL )
panic ( " eata_pio_reset: slot %d, sp==NULL. \n " , x ) ;
}
/* hard reset the HBA */
2006-09-19 02:18:34 +08:00
outb ( EATA_CMD_RESET , cmd - > device - > host - > base + HA_WCOMMAND ) ;
2005-04-17 06:20:36 +08:00
DBG ( DBG_ABNORM , printk ( KERN_WARNING " eata_pio_reset: board reset done. \n " ) ) ;
HD ( cmd ) - > state = RESET ;
spin_unlock_irq ( host - > host_lock ) ;
msleep ( 3000 ) ;
spin_lock_irq ( host - > host_lock ) ;
DBG ( DBG_ABNORM , printk ( KERN_WARNING " eata_pio_reset: interrupts disabled, " " loops %d. \n " , limit ) ) ;
for ( x = 0 ; x < cmd - > device - > host - > can_queue ; x + + ) {
/* Skip slots already set free by interrupt */
if ( HD ( cmd ) - > ccb [ x ] . status ! = RESET )
continue ;
sp = HD ( cmd ) - > ccb [ x ] . cmd ;
sp - > result = DID_RESET < < 16 ;
/* This mailbox is terminated */
printk ( KERN_WARNING " eata_pio_reset: reset ccb %d. \n " , x ) ;
HD ( cmd ) - > ccb [ x ] . status = FREE ;
sp - > scsi_done ( sp ) ;
}
HD ( cmd ) - > state = 0 ;
2005-05-28 19:57:14 +08:00
spin_unlock_irq ( host - > host_lock ) ;
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if ( success ) { /* hmmm... */
DBG ( DBG_ABNORM , printk ( KERN_WARNING " eata_pio_reset: exit, success. \n " ) ) ;
return SUCCESS ;
} else {
DBG ( DBG_ABNORM , printk ( KERN_WARNING " eata_pio_reset: exit, wakeup. \n " ) ) ;
return FAILED ;
}
}
2006-09-19 02:18:34 +08:00
static char * get_pio_board_data ( unsigned long base , unsigned int irq , unsigned int id , unsigned long cplen , unsigned short cppadlen )
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{
struct eata_ccb cp ;
static char buff [ 256 ] ;
int z ;
memset ( & cp , 0 , sizeof ( struct eata_ccb ) ) ;
memset ( buff , 0 , sizeof ( buff ) ) ;
cp . DataIn = 1 ;
cp . Interpret = 1 ; /* Interpret command */
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cp . cp_datalen = cpu_to_be32 ( 254 ) ;
cp . cp_dataDMA = cpu_to_be32 ( 0 ) ;
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cp . cp_id = id ;
cp . cp_lun = 0 ;
cp . cp_cdb [ 0 ] = INQUIRY ;
cp . cp_cdb [ 1 ] = 0 ;
cp . cp_cdb [ 2 ] = 0 ;
cp . cp_cdb [ 3 ] = 0 ;
cp . cp_cdb [ 4 ] = 254 ;
cp . cp_cdb [ 5 ] = 0 ;
2006-09-19 02:18:34 +08:00
if ( eata_pio_send_command ( base , EATA_CMD_PIO_SEND_CP ) )
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return NULL ;
while ( ! ( inb ( base + HA_RSTATUS ) & HA_SDRQ ) )
cpu_relax ( ) ;
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outsw ( base + HA_RDATA , & cp , cplen ) ;
outb ( EATA_CMD_PIO_TRUNC , base + HA_WCOMMAND ) ;
for ( z = 0 ; z < cppadlen ; z + + )
outw ( 0 , base + HA_RDATA ) ;
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while ( inb ( base + HA_RSTATUS ) & HA_SBUSY )
cpu_relax ( ) ;
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if ( inb ( base + HA_RSTATUS ) & HA_SERROR )
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return NULL ;
2005-04-17 06:20:36 +08:00
else if ( ! ( inb ( base + HA_RSTATUS ) & HA_SDRQ ) )
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return NULL ;
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else {
insw ( base + HA_RDATA , & buff , 127 ) ;
while ( inb ( base + HA_RSTATUS ) & HA_SDRQ )
inw ( base + HA_RDATA ) ;
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return buff ;
2005-04-17 06:20:36 +08:00
}
}
2006-09-19 02:18:34 +08:00
static int get_pio_conf_PIO ( unsigned long base , struct get_conf * buf )
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{
unsigned long loop = HZ / 2 ;
int z ;
unsigned short * p ;
if ( ! request_region ( base , 9 , " eata_pio " ) )
return 0 ;
memset ( buf , 0 , sizeof ( struct get_conf ) ) ;
while ( inb ( base + HA_RSTATUS ) & HA_SBUSY )
if ( - - loop = = 0 )
goto fail ;
2006-09-19 02:18:34 +08:00
DBG ( DBG_PIO & & DBG_PROBE , printk ( KERN_DEBUG " Issuing PIO READ CONFIG to HBA at %#lx \n " , base ) ) ;
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eata_pio_send_command ( base , EATA_CMD_PIO_READ_CONFIG ) ;
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loop = 50 ;
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for ( p = ( unsigned short * ) buf ; ( long ) p < = ( ( long ) buf + ( sizeof ( struct get_conf ) / 2 ) ) ; p + + ) {
while ( ! ( inb ( base + HA_RSTATUS ) & HA_SDRQ ) )
if ( - - loop = = 0 )
goto fail ;
2006-09-19 02:18:34 +08:00
loop = 50 ;
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* p = inw ( base + HA_RDATA ) ;
}
if ( inb ( base + HA_RSTATUS ) & HA_SERROR ) {
DBG ( DBG_PROBE , printk ( " eata_dma: get_conf_PIO, error during "
2006-09-19 02:18:34 +08:00
" transfer for HBA at %lx \n " , base ) ) ;
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goto fail ;
}
2006-09-19 02:18:34 +08:00
if ( cpu_to_be32 ( EATA_SIGNATURE ) ! = buf - > signature )
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goto fail ;
DBG ( DBG_PIO & & DBG_PROBE , printk ( KERN_NOTICE " EATA Controller found "
2006-09-19 02:18:34 +08:00
" at %#4lx EATA Level: %x \n " ,
base , ( unsigned int ) ( buf - > version ) ) ) ;
2005-04-17 06:20:36 +08:00
while ( inb ( base + HA_RSTATUS ) & HA_SDRQ )
inw ( base + HA_RDATA ) ;
if ( ! ALLOW_DMA_BOARDS ) {
for ( z = 0 ; z < MAXISA ; z + + )
if ( base = = ISAbases [ z ] ) {
buf - > IRQ = ISAirqs [ z ] ;
break ;
}
}
return 1 ;
fail :
release_region ( base , 9 ) ;
return 0 ;
}
static void print_pio_config ( struct get_conf * gc )
{
printk ( " Please check values: (read config data) \n " ) ;
2006-09-19 02:18:34 +08:00
printk ( " LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d \n " , be32_to_cpu ( gc - > len ) , gc - > version , gc - > OCS_enabled , gc - > TAR_support , gc - > TRNXFR , gc - > MORE_support ) ;
printk ( " HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d \n " , gc - > HAA_valid , gc - > scsi_id [ 3 ] , gc - > scsi_id [ 2 ] , gc - > scsi_id [ 1 ] , be16_to_cpu ( gc - > queuesiz ) , be16_to_cpu ( gc - > SGsiz ) , gc - > SECOND ) ;
2005-04-17 06:20:36 +08:00
printk ( " IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d \n " , gc - > IRQ , gc - > IRQ_TR , gc - > FORCADR , gc - > MAX_CHAN , gc - > ID_qest ) ;
}
2006-09-19 02:18:34 +08:00
static unsigned int print_selftest ( unsigned int base )
2005-04-17 06:20:36 +08:00
{
unsigned char buffer [ 512 ] ;
# ifdef VERBOSE_SETUP
int z ;
# endif
printk ( " eata_pio: executing controller self test & setup... \n " ) ;
while ( inb ( base + HA_RSTATUS ) & HA_SBUSY ) ;
outb ( EATA_CMD_PIO_SETUPTEST , base + HA_WCOMMAND ) ;
do {
while ( inb ( base + HA_RSTATUS ) & HA_SBUSY )
/* nothing */ ;
if ( inb ( base + HA_RSTATUS ) & HA_SDRQ ) {
insw ( base + HA_RDATA , & buffer , 256 ) ;
# ifdef VERBOSE_SETUP
/* no beeps please... */
for ( z = 0 ; z < 511 & & buffer [ z ] ; z + + )
if ( buffer [ z ] ! = 7 )
printk ( " %c " , buffer [ z ] ) ;
# endif
}
} while ( inb ( base + HA_RSTATUS ) & ( HA_SBUSY | HA_SDRQ ) ) ;
return ( ! ( inb ( base + HA_RSTATUS ) & HA_SERROR ) ) ;
}
2006-09-19 02:18:34 +08:00
static int register_pio_HBA ( long base , struct get_conf * gc , struct pci_dev * pdev )
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{
unsigned long size = 0 ;
char * buff ;
unsigned long cplen ;
unsigned short cppadlen ;
struct Scsi_Host * sh ;
hostdata * hd ;
DBG ( DBG_REGISTER , print_pio_config ( gc ) ) ;
if ( gc - > DMA_support ) {
printk ( " HBA at %#.4lx supports DMA. Please use EATA-DMA driver. \n " , base ) ;
if ( ! ALLOW_DMA_BOARDS )
return 0 ;
}
2006-09-19 02:18:34 +08:00
if ( ( buff = get_pio_board_data ( base , gc - > IRQ , gc - > scsi_id [ 3 ] , cplen = ( cpu_to_be32 ( gc - > cplen ) + 1 ) / 2 , cppadlen = ( cpu_to_be16 ( gc - > cppadlen ) + 1 ) / 2 ) ) = = NULL ) {
printk ( " HBA at %#lx didn't react on INQUIRY. Sorry. \n " , base ) ;
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return 0 ;
}
if ( ! print_selftest ( base ) & & ! ALLOW_DMA_BOARDS ) {
2006-09-19 02:18:34 +08:00
printk ( " HBA at %#lx failed while performing self test & setup. \n " , base ) ;
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return 0 ;
}
2006-09-19 02:18:34 +08:00
size = sizeof ( hostdata ) + ( sizeof ( struct eata_ccb ) * be16_to_cpu ( gc - > queuesiz ) ) ;
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sh = scsi_register ( & driver_template , size ) ;
if ( sh = = NULL )
return 0 ;
if ( ! reg_IRQ [ gc - > IRQ ] ) { /* Interrupt already registered ? */
2014-03-05 13:09:41 +08:00
if ( ! request_irq ( gc - > IRQ , do_eata_pio_int_handler , 0 , " EATA-PIO " , sh ) ) {
2005-04-17 06:20:36 +08:00
reg_IRQ [ gc - > IRQ ] + + ;
if ( ! gc - > IRQ_TR )
reg_IRQL [ gc - > IRQ ] = 1 ; /* IRQ is edge triggered */
} else {
printk ( " Couldn't allocate IRQ %d, Sorry. \n " , gc - > IRQ ) ;
return 0 ;
}
} else { /* More than one HBA on this IRQ */
if ( reg_IRQL [ gc - > IRQ ] ) {
printk ( " Can't support more than one HBA on this IRQ, \n " " if the IRQ is edge triggered. Sorry. \n " ) ;
return 0 ;
} else
reg_IRQ [ gc - > IRQ ] + + ;
}
hd = SD ( sh ) ;
2006-09-19 02:18:34 +08:00
memset ( hd - > ccb , 0 , ( sizeof ( struct eata_ccb ) * be16_to_cpu ( gc - > queuesiz ) ) ) ;
memset ( hd - > reads , 0 , sizeof ( hd - > reads ) ) ;
2005-04-17 06:20:36 +08:00
strlcpy ( SD ( sh ) - > vendor , & buff [ 8 ] , sizeof ( SD ( sh ) - > vendor ) ) ;
strlcpy ( SD ( sh ) - > name , & buff [ 16 ] , sizeof ( SD ( sh ) - > name ) ) ;
SD ( sh ) - > revision [ 0 ] = buff [ 32 ] ;
SD ( sh ) - > revision [ 1 ] = buff [ 33 ] ;
SD ( sh ) - > revision [ 2 ] = buff [ 34 ] ;
SD ( sh ) - > revision [ 3 ] = ' . ' ;
SD ( sh ) - > revision [ 4 ] = buff [ 35 ] ;
SD ( sh ) - > revision [ 5 ] = 0 ;
2006-09-19 02:18:34 +08:00
switch ( be32_to_cpu ( gc - > len ) ) {
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case 0x1c :
SD ( sh ) - > EATA_revision = ' a ' ;
break ;
case 0x1e :
SD ( sh ) - > EATA_revision = ' b ' ;
break ;
case 0x22 :
SD ( sh ) - > EATA_revision = ' c ' ;
break ;
case 0x24 :
SD ( sh ) - > EATA_revision = ' z ' ;
default :
SD ( sh ) - > EATA_revision = ' ? ' ;
}
2006-09-19 02:18:34 +08:00
if ( be32_to_cpu ( gc - > len ) > = 0x22 ) {
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if ( gc - > is_PCI )
hd - > bustype = IS_PCI ;
else if ( gc - > is_EISA )
hd - > bustype = IS_EISA ;
else
hd - > bustype = IS_ISA ;
} else {
if ( buff [ 21 ] = = ' 4 ' )
hd - > bustype = IS_PCI ;
else if ( buff [ 21 ] = = ' 2 ' )
hd - > bustype = IS_EISA ;
else
hd - > bustype = IS_ISA ;
}
SD ( sh ) - > cplen = cplen ;
SD ( sh ) - > cppadlen = cppadlen ;
SD ( sh ) - > hostid = gc - > scsi_id [ 3 ] ;
SD ( sh ) - > devflags = 1 < < gc - > scsi_id [ 3 ] ;
SD ( sh ) - > moresupport = gc - > MORE_support ;
sh - > unique_id = base ;
sh - > base = base ;
sh - > io_port = base ;
sh - > n_io_port = 9 ;
sh - > irq = gc - > IRQ ;
sh - > dma_channel = PIO ;
sh - > this_id = gc - > scsi_id [ 3 ] ;
sh - > can_queue = 1 ;
sh - > cmd_per_lun = 1 ;
sh - > sg_tablesize = SG_ALL ;
hd - > channel = 0 ;
2006-09-19 02:18:34 +08:00
hd - > pdev = pci_dev_get ( pdev ) ; /* Keep a PCI reference */
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sh - > max_id = 8 ;
sh - > max_lun = 8 ;
if ( gc - > SECOND )
hd - > primary = 0 ;
else
hd - > primary = 1 ;
hd - > next = NULL ; /* build a linked list of all HBAs */
hd - > prev = last_HBA ;
if ( hd - > prev ! = NULL )
SD ( hd - > prev ) - > next = sh ;
last_HBA = sh ;
if ( first_HBA = = NULL )
first_HBA = sh ;
registered_HBAs + + ;
return ( 1 ) ;
}
static void find_pio_ISA ( struct get_conf * buf )
{
int i ;
for ( i = 0 ; i < MAXISA ; i + + ) {
if ( ! ISAbases [ i ] )
continue ;
if ( ! get_pio_conf_PIO ( ISAbases [ i ] , buf ) )
continue ;
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if ( ! register_pio_HBA ( ISAbases [ i ] , buf , NULL ) )
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release_region ( ISAbases [ i ] , 9 ) ;
else
ISAbases [ i ] = 0 ;
}
return ;
}
static void find_pio_EISA ( struct get_conf * buf )
{
u32 base ;
int i ;
# ifdef CHECKPAL
u8 pal1 , pal2 , pal3 ;
# endif
for ( i = 0 ; i < MAXEISA ; i + + ) {
if ( EISAbases [ i ] ) { /* Still a possibility ? */
base = 0x1c88 + ( i * 0x1000 ) ;
# ifdef CHECKPAL
pal1 = inb ( ( u16 ) base - 8 ) ;
pal2 = inb ( ( u16 ) base - 7 ) ;
pal3 = inb ( ( u16 ) base - 6 ) ;
if ( ( ( pal1 = = 0x12 ) & & ( pal2 = = 0x14 ) ) | | ( ( pal1 = = 0x38 ) & & ( pal2 = = 0xa3 ) & & ( pal3 = = 0x82 ) ) | | ( ( pal1 = = 0x06 ) & & ( pal2 = = 0x94 ) & & ( pal3 = = 0x24 ) ) ) {
DBG ( DBG_PROBE , printk ( KERN_NOTICE " EISA EATA id tags found: " " %x %x %x \n " , ( int ) pal1 , ( int ) pal2 , ( int ) pal3 ) ) ;
# endif
if ( get_pio_conf_PIO ( base , buf ) ) {
DBG ( DBG_PROBE & & DBG_EISA , print_pio_config ( buf ) ) ;
if ( buf - > IRQ ) {
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if ( ! register_pio_HBA ( base , buf , NULL ) )
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release_region ( base , 9 ) ;
} else {
printk ( KERN_NOTICE " eata_dma: No valid IRQ. HBA " " removed from list \n " ) ;
release_region ( base , 9 ) ;
}
}
/* Nothing found here so we take it from the list */
EISAbases [ i ] = 0 ;
# ifdef CHECKPAL
}
# endif
}
}
return ;
}
static void find_pio_PCI ( struct get_conf * buf )
{
# ifndef CONFIG_PCI
printk ( " eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs. \n " ) ;
# else
struct pci_dev * dev = NULL ;
2006-09-19 02:18:34 +08:00
unsigned long base , x ;
2005-04-17 06:20:36 +08:00
2006-09-19 02:18:34 +08:00
while ( ( dev = pci_get_device ( PCI_VENDOR_ID_DPT , PCI_DEVICE_ID_DPT , dev ) ) ! = NULL ) {
2005-04-17 06:20:36 +08:00
DBG ( DBG_PROBE & & DBG_PCI , printk ( " eata_pio: find_PCI, HBA at %s \n " , pci_name ( dev ) ) ) ;
if ( pci_enable_device ( dev ) )
continue ;
pci_set_master ( dev ) ;
base = pci_resource_flags ( dev , 0 ) ;
if ( base & IORESOURCE_MEM ) {
printk ( " eata_pio: invalid base address of device %s \n " , pci_name ( dev ) ) ;
continue ;
}
base = pci_resource_start ( dev , 0 ) ;
/* EISA tag there ? */
if ( ( inb ( base ) = = 0x12 ) & & ( inb ( base + 1 ) = = 0x14 ) )
continue ; /* Jep, it's forced, so move on */
base + = 0x10 ; /* Now, THIS is the real address */
if ( base ! = 0x1f8 ) {
/* We didn't find it in the primary search */
if ( get_pio_conf_PIO ( base , buf ) ) {
if ( buf - > FORCADR ) { /* If the address is forced */
release_region ( base , 9 ) ;
continue ; /* we'll find it later */
}
/* OK. We made it till here, so we can go now
* and register it . We only have to check and
* eventually remove it from the EISA and ISA list
*/
2006-09-19 02:18:34 +08:00
if ( ! register_pio_HBA ( base , buf , dev ) ) {
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release_region ( base , 9 ) ;
continue ;
}
if ( base < 0x1000 ) {
for ( x = 0 ; x < MAXISA ; + + x ) {
if ( ISAbases [ x ] = = base ) {
ISAbases [ x ] = 0 ;
break ;
}
}
} else if ( ( base & 0x0fff ) = = 0x0c88 ) {
x = ( base > > 12 ) & 0x0f ;
EISAbases [ x ] = 0 ;
}
}
# ifdef CHECK_BLINK
else if ( check_blink_state ( base ) ) {
printk ( " eata_pio: HBA is in BLINK state. \n " " Consult your HBAs manual to correct this. \n " ) ;
}
# endif
}
}
# endif /* #ifndef CONFIG_PCI */
}
static int eata_pio_detect ( struct scsi_host_template * tpnt )
{
struct Scsi_Host * HBA_ptr ;
struct get_conf gc ;
int i ;
find_pio_PCI ( & gc ) ;
find_pio_EISA ( & gc ) ;
find_pio_ISA ( & gc ) ;
2013-08-23 20:11:31 +08:00
for ( i = 0 ; i < MAXIRQ ; i + + )
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if ( reg_IRQ [ i ] )
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request_irq ( i , do_eata_pio_int_handler , 0 , " EATA-PIO " , NULL ) ;
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HBA_ptr = first_HBA ;
if ( registered_HBAs ! = 0 ) {
printk ( " EATA (Extended Attachment) PIO driver version: %d.%d%s \n "
" (c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de \n " " Alfred Arnold, a.arnold@kfa-juelich.de \n " " This release only supports DASD devices (harddisks) \n " , VER_MAJOR , VER_MINOR , VER_SUB ) ;
printk ( " Registered HBAs: \n " ) ;
printk ( " HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr: " " QS: SG: CPL: \n " ) ;
for ( i = 1 ; i < = registered_HBAs ; i + + ) {
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printk ( " scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c "
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" %2d %2d %2d \n " ,
HBA_ptr - > host_no , SD ( HBA_ptr ) - > name , SD ( HBA_ptr ) - > revision ,
SD ( HBA_ptr ) - > EATA_revision , ( SD ( HBA_ptr ) - > bustype = = ' P ' ) ?
" PCI " : ( SD ( HBA_ptr ) - > bustype = = ' E ' ) ? " EISA " : " ISA " ,
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HBA_ptr - > base , HBA_ptr - > irq , SD ( HBA_ptr ) - > channel , HBA_ptr - > this_id ,
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SD ( HBA_ptr ) - > primary ? ' Y ' : ' N ' , HBA_ptr - > can_queue ,
HBA_ptr - > sg_tablesize , HBA_ptr - > cmd_per_lun ) ;
HBA_ptr = SD ( HBA_ptr ) - > next ;
}
}
return ( registered_HBAs ) ;
}
static struct scsi_host_template driver_template = {
. proc_name = " eata_pio " ,
. name = " EATA (Extended Attachment) PIO driver " ,
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. show_info = eata_pio_show_info ,
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. detect = eata_pio_detect ,
. release = eata_pio_release ,
. queuecommand = eata_pio_queue ,
. eh_abort_handler = eata_pio_abort ,
. eh_host_reset_handler = eata_pio_host_reset ,
. use_clustering = ENABLE_CLUSTERING ,
} ;
MODULE_AUTHOR ( " Michael Neuffer, Alfred Arnold " ) ;
MODULE_DESCRIPTION ( " EATA SCSI PIO driver " ) ;
MODULE_LICENSE ( " GPL " ) ;
# include "scsi_module.c"
