mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
fd53699831
A cleanup patch introduced a fatal typo from inbalanced curly braces:
drivers/scsi/arm/acornscsi.c: In function 'acornscsi_host_reset':
drivers/scsi/arm/acornscsi.c:2773:1: error: ISO C90 forbids mixed declarations and code [-Werror=declaration-after-statement]
drivers/scsi/arm/acornscsi.c:2795:12: error: invalid storage class for function 'acornscsi_show_info'
static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance)
The same patch incorrectly changed the argument type of the reset
handler, as shown by this warning:
drivers/scsi/arm/acornscsi.c:2888:27: error: initialization of 'int (*)(struct scsi_cmnd *)' from incompatible pointer type 'int (*)(struct Scsi_Host *)' [-Werror=incompatible-pointer-types]
.eh_host_reset_handler = acornscsi_host_reset,
This removes one the extraneous opening brace and reverts the
argument type change.
[mkp: fixed checkpatch complaint]
Fixes: 74fa80ee3f
("scsi: acornscsi: move bus reset to host reset")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
3017 lines
84 KiB
C
3017 lines
84 KiB
C
/*
|
|
* linux/drivers/acorn/scsi/acornscsi.c
|
|
*
|
|
* Acorn SCSI 3 driver
|
|
* By R.M.King.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Abandoned using the Select and Transfer command since there were
|
|
* some nasty races between our software and the target devices that
|
|
* were not easy to solve, and the device errata had a lot of entries
|
|
* for this command, some of them quite nasty...
|
|
*
|
|
* Changelog:
|
|
* 26-Sep-1997 RMK Re-jigged to use the queue module.
|
|
* Re-coded state machine to be based on driver
|
|
* state not scsi state. Should be easier to debug.
|
|
* Added acornscsi_release to clean up properly.
|
|
* Updated proc/scsi reporting.
|
|
* 05-Oct-1997 RMK Implemented writing to SCSI devices.
|
|
* 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/
|
|
* reconnect race condition causing a warning message.
|
|
* 12-Oct-1997 RMK Added catch for re-entering interrupt routine.
|
|
* 15-Oct-1997 RMK Improved handling of commands.
|
|
* 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h.
|
|
* 13-Dec-1998 RMK Better abort code and command handling. Extra state
|
|
* transitions added to allow dodgy devices to work.
|
|
*/
|
|
#define DEBUG_NO_WRITE 1
|
|
#define DEBUG_QUEUES 2
|
|
#define DEBUG_DMA 4
|
|
#define DEBUG_ABORT 8
|
|
#define DEBUG_DISCON 16
|
|
#define DEBUG_CONNECT 32
|
|
#define DEBUG_PHASES 64
|
|
#define DEBUG_WRITE 128
|
|
#define DEBUG_LINK 256
|
|
#define DEBUG_MESSAGES 512
|
|
#define DEBUG_RESET 1024
|
|
#define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\
|
|
DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\
|
|
DEBUG_DMA|DEBUG_QUEUES)
|
|
|
|
/* DRIVER CONFIGURATION
|
|
*
|
|
* SCSI-II Tagged queue support.
|
|
*
|
|
* I don't have any SCSI devices that support it, so it is totally untested
|
|
* (except to make sure that it doesn't interfere with any non-tagging
|
|
* devices). It is not fully implemented either - what happens when a
|
|
* tagging device reconnects???
|
|
*
|
|
* You can tell if you have a device that supports tagged queueing my
|
|
* cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported
|
|
* as '2 TAG'.
|
|
*
|
|
* Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config
|
|
* scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug,
|
|
* comment out the undef.
|
|
*/
|
|
#undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
/*
|
|
* SCSI-II Synchronous transfer support.
|
|
*
|
|
* Tried and tested...
|
|
*
|
|
* SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max)
|
|
* SDTR_PERIOD - period of REQ signal (min=125, max=1020)
|
|
* DEFAULT_PERIOD - default REQ period.
|
|
*/
|
|
#define SDTR_SIZE 12
|
|
#define SDTR_PERIOD 125
|
|
#define DEFAULT_PERIOD 500
|
|
|
|
/*
|
|
* Debugging information
|
|
*
|
|
* DEBUG - bit mask from list above
|
|
* DEBUG_TARGET - is defined to the target number if you want to debug
|
|
* a specific target. [only recon/write/dma].
|
|
*/
|
|
#define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE)
|
|
/* only allow writing to SCSI device 0 */
|
|
#define NO_WRITE 0xFE
|
|
/*#define DEBUG_TARGET 2*/
|
|
/*
|
|
* Select timeout time (in 10ms units)
|
|
*
|
|
* This is the timeout used between the start of selection and the WD33C93
|
|
* chip deciding that the device isn't responding.
|
|
*/
|
|
#define TIMEOUT_TIME 10
|
|
/*
|
|
* Define this if you want to have verbose explanation of SCSI
|
|
* status/messages.
|
|
*/
|
|
#undef CONFIG_ACORNSCSI_CONSTANTS
|
|
/*
|
|
* Define this if you want to use the on board DMAC [don't remove this option]
|
|
* If not set, then use PIO mode (not currently supported).
|
|
*/
|
|
#define USE_DMAC
|
|
|
|
/*
|
|
* ====================================================================================
|
|
*/
|
|
|
|
#ifdef DEBUG_TARGET
|
|
#define DBG(cmd,xxx...) \
|
|
if (cmd->device->id == DEBUG_TARGET) { \
|
|
xxx; \
|
|
}
|
|
#else
|
|
#define DBG(cmd,xxx...) xxx
|
|
#endif
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/stringify.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/ecard.h>
|
|
|
|
#include "../scsi.h"
|
|
#include <scsi/scsi_dbg.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <scsi/scsi_transport_spi.h>
|
|
#include "acornscsi.h"
|
|
#include "msgqueue.h"
|
|
#include "scsi.h"
|
|
|
|
#include <scsi/scsicam.h>
|
|
|
|
#define VER_MAJOR 2
|
|
#define VER_MINOR 0
|
|
#define VER_PATCH 6
|
|
|
|
#ifndef ABORT_TAG
|
|
#define ABORT_TAG 0xd
|
|
#else
|
|
#error "Yippee! ABORT TAG is now defined! Remove this error!"
|
|
#endif
|
|
|
|
#ifdef USE_DMAC
|
|
/*
|
|
* DMAC setup parameters
|
|
*/
|
|
#define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP)
|
|
#define INIT_DEVCON1 (DEVCON1_BHLD)
|
|
#define DMAC_READ (MODECON_READ)
|
|
#define DMAC_WRITE (MODECON_WRITE)
|
|
#define INIT_SBICDMA (CTRL_DMABURST)
|
|
|
|
#define scsi_xferred have_data_in
|
|
|
|
/*
|
|
* Size of on-board DMA buffer
|
|
*/
|
|
#define DMAC_BUFFER_SIZE 65536
|
|
#endif
|
|
|
|
#define STATUS_BUFFER_TO_PRINT 24
|
|
|
|
unsigned int sdtr_period = SDTR_PERIOD;
|
|
unsigned int sdtr_size = SDTR_SIZE;
|
|
|
|
static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
|
|
unsigned int result);
|
|
static int acornscsi_reconnect_finish(AS_Host *host);
|
|
static void acornscsi_dma_cleanup(AS_Host *host);
|
|
static void acornscsi_abortcmd(AS_Host *host, unsigned char tag);
|
|
|
|
/* ====================================================================================
|
|
* Miscellaneous
|
|
*/
|
|
|
|
/* Offsets from MEMC base */
|
|
#define SBIC_REGIDX 0x2000
|
|
#define SBIC_REGVAL 0x2004
|
|
#define DMAC_OFFSET 0x3000
|
|
|
|
/* Offsets from FAST IOC base */
|
|
#define INT_REG 0x2000
|
|
#define PAGE_REG 0x3000
|
|
|
|
static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value)
|
|
{
|
|
writeb(reg, host->base + SBIC_REGIDX);
|
|
writeb(value, host->base + SBIC_REGVAL);
|
|
}
|
|
|
|
static inline int sbic_arm_read(AS_Host *host, unsigned int reg)
|
|
{
|
|
if(reg == SBIC_ASR)
|
|
return readl(host->base + SBIC_REGIDX) & 255;
|
|
writeb(reg, host->base + SBIC_REGIDX);
|
|
return readl(host->base + SBIC_REGVAL) & 255;
|
|
}
|
|
|
|
#define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL)
|
|
#define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL)
|
|
|
|
#ifdef USE_DMAC
|
|
#define dmac_read(host,reg) \
|
|
readb((host)->base + DMAC_OFFSET + ((reg) << 2))
|
|
|
|
#define dmac_write(host,reg,value) \
|
|
({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); })
|
|
|
|
#define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG)
|
|
|
|
static inline unsigned int dmac_address(AS_Host *host)
|
|
{
|
|
return dmac_read(host, DMAC_TXADRHI) << 16 |
|
|
dmac_read(host, DMAC_TXADRMD) << 8 |
|
|
dmac_read(host, DMAC_TXADRLO);
|
|
}
|
|
|
|
static
|
|
void acornscsi_dumpdma(AS_Host *host, char *where)
|
|
{
|
|
unsigned int mode, addr, len;
|
|
|
|
mode = dmac_read(host, DMAC_MODECON);
|
|
addr = dmac_address(host);
|
|
len = dmac_read(host, DMAC_TXCNTHI) << 8 |
|
|
dmac_read(host, DMAC_TXCNTLO);
|
|
|
|
printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ",
|
|
host->host->host_no, where,
|
|
mode, addr, (len + 1) & 0xffff,
|
|
dmac_read(host, DMAC_MASKREG));
|
|
|
|
printk("DMA @%06x, ", host->dma.start_addr);
|
|
printk("BH @%p +%04x, ", host->scsi.SCp.ptr,
|
|
host->scsi.SCp.this_residual);
|
|
printk("DT @+%04x ST @+%04x", host->dma.transferred,
|
|
host->scsi.SCp.scsi_xferred);
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
|
|
static
|
|
unsigned long acornscsi_sbic_xfcount(AS_Host *host)
|
|
{
|
|
unsigned long length;
|
|
|
|
length = sbic_arm_read(host, SBIC_TRANSCNTH) << 16;
|
|
length |= sbic_arm_readnext(host) << 8;
|
|
length |= sbic_arm_readnext(host);
|
|
|
|
return length;
|
|
}
|
|
|
|
static int
|
|
acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg)
|
|
{
|
|
int asr;
|
|
|
|
do {
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
|
|
if ((asr & stat_mask) == stat)
|
|
return 0;
|
|
|
|
udelay(1);
|
|
} while (--timeout);
|
|
|
|
printk("scsi%d: timeout while %s\n", host->host->host_no, msg);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static
|
|
int acornscsi_sbic_issuecmd(AS_Host *host, int command)
|
|
{
|
|
if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command"))
|
|
return -1;
|
|
|
|
sbic_arm_write(host, SBIC_CMND, command);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
acornscsi_csdelay(unsigned int cs)
|
|
{
|
|
unsigned long target_jiffies, flags;
|
|
|
|
target_jiffies = jiffies + 1 + cs * HZ / 100;
|
|
|
|
local_save_flags(flags);
|
|
local_irq_enable();
|
|
|
|
while (time_before(jiffies, target_jiffies)) barrier();
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static
|
|
void acornscsi_resetcard(AS_Host *host)
|
|
{
|
|
unsigned int i, timeout;
|
|
|
|
/* assert reset line */
|
|
host->card.page_reg = 0x80;
|
|
writeb(host->card.page_reg, host->fast + PAGE_REG);
|
|
|
|
/* wait 3 cs. SCSI standard says 25ms. */
|
|
acornscsi_csdelay(3);
|
|
|
|
host->card.page_reg = 0;
|
|
writeb(host->card.page_reg, host->fast + PAGE_REG);
|
|
|
|
/*
|
|
* Should get a reset from the card
|
|
*/
|
|
timeout = 1000;
|
|
do {
|
|
if (readb(host->fast + INT_REG) & 8)
|
|
break;
|
|
udelay(1);
|
|
} while (--timeout);
|
|
|
|
if (timeout == 0)
|
|
printk("scsi%d: timeout while resetting card\n",
|
|
host->host->host_no);
|
|
|
|
sbic_arm_read(host, SBIC_ASR);
|
|
sbic_arm_read(host, SBIC_SSR);
|
|
|
|
/* setup sbic - WD33C93A */
|
|
sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id);
|
|
sbic_arm_write(host, SBIC_CMND, CMND_RESET);
|
|
|
|
/*
|
|
* Command should cause a reset interrupt
|
|
*/
|
|
timeout = 1000;
|
|
do {
|
|
if (readb(host->fast + INT_REG) & 8)
|
|
break;
|
|
udelay(1);
|
|
} while (--timeout);
|
|
|
|
if (timeout == 0)
|
|
printk("scsi%d: timeout while resetting card\n",
|
|
host->host->host_no);
|
|
|
|
sbic_arm_read(host, SBIC_ASR);
|
|
if (sbic_arm_read(host, SBIC_SSR) != 0x01)
|
|
printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n",
|
|
host->host->host_no);
|
|
|
|
sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
|
|
sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
|
|
sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
|
|
sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
|
|
|
|
host->card.page_reg = 0x40;
|
|
writeb(host->card.page_reg, host->fast + PAGE_REG);
|
|
|
|
/* setup dmac - uPC71071 */
|
|
dmac_write(host, DMAC_INIT, 0);
|
|
#ifdef USE_DMAC
|
|
dmac_write(host, DMAC_INIT, INIT_8BIT);
|
|
dmac_write(host, DMAC_CHANNEL, CHANNEL_0);
|
|
dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0);
|
|
dmac_write(host, DMAC_DEVCON1, INIT_DEVCON1);
|
|
#endif
|
|
|
|
host->SCpnt = NULL;
|
|
host->scsi.phase = PHASE_IDLE;
|
|
host->scsi.disconnectable = 0;
|
|
|
|
memset(host->busyluns, 0, sizeof(host->busyluns));
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
host->device[i].sync_state = SYNC_NEGOCIATE;
|
|
host->device[i].disconnect_ok = 1;
|
|
}
|
|
|
|
/* wait 25 cs. SCSI standard says 250ms. */
|
|
acornscsi_csdelay(25);
|
|
}
|
|
|
|
/*=============================================================================================
|
|
* Utility routines (eg. debug)
|
|
*/
|
|
#ifdef CONFIG_ACORNSCSI_CONSTANTS
|
|
static char *acornscsi_interrupttype[] = {
|
|
"rst", "suc", "p/a", "3",
|
|
"term", "5", "6", "7",
|
|
"serv", "9", "a", "b",
|
|
"c", "d", "e", "f"
|
|
};
|
|
|
|
static signed char acornscsi_map[] = {
|
|
0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
|
|
};
|
|
|
|
static char *acornscsi_interruptcode[] = {
|
|
/* 0 */
|
|
"reset - normal mode", /* 00 */
|
|
"reset - advanced mode", /* 01 */
|
|
|
|
/* 2 */
|
|
"sel", /* 11 */
|
|
"sel+xfer", /* 16 */
|
|
"data-out", /* 18 */
|
|
"data-in", /* 19 */
|
|
"cmd", /* 1A */
|
|
"stat", /* 1B */
|
|
"??-out", /* 1C */
|
|
"??-in", /* 1D */
|
|
"msg-out", /* 1E */
|
|
"msg-in", /* 1F */
|
|
|
|
/* 12 */
|
|
"/ACK asserted", /* 20 */
|
|
"save-data-ptr", /* 21 */
|
|
"{re}sel", /* 22 */
|
|
|
|
/* 15 */
|
|
"inv cmd", /* 40 */
|
|
"unexpected disconnect", /* 41 */
|
|
"sel timeout", /* 42 */
|
|
"P err", /* 43 */
|
|
"P err+ATN", /* 44 */
|
|
"bad status byte", /* 47 */
|
|
|
|
/* 21 */
|
|
"resel, no id", /* 80 */
|
|
"resel", /* 81 */
|
|
"discon", /* 85 */
|
|
};
|
|
|
|
static
|
|
void print_scsi_status(unsigned int ssr)
|
|
{
|
|
if (acornscsi_map[ssr] != -1)
|
|
printk("%s:%s",
|
|
acornscsi_interrupttype[(ssr >> 4)],
|
|
acornscsi_interruptcode[acornscsi_map[ssr]]);
|
|
else
|
|
printk("%X:%X", ssr >> 4, ssr & 0x0f);
|
|
}
|
|
#endif
|
|
|
|
static
|
|
void print_sbic_status(int asr, int ssr, int cmdphase)
|
|
{
|
|
#ifdef CONFIG_ACORNSCSI_CONSTANTS
|
|
printk("sbic: %c%c%c%c%c%c ",
|
|
asr & ASR_INT ? 'I' : 'i',
|
|
asr & ASR_LCI ? 'L' : 'l',
|
|
asr & ASR_BSY ? 'B' : 'b',
|
|
asr & ASR_CIP ? 'C' : 'c',
|
|
asr & ASR_PE ? 'P' : 'p',
|
|
asr & ASR_DBR ? 'D' : 'd');
|
|
printk("scsi: ");
|
|
print_scsi_status(ssr);
|
|
printk(" ph %02X\n", cmdphase);
|
|
#else
|
|
printk("sbic: %02X scsi: %X:%X ph: %02X\n",
|
|
asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
acornscsi_dumplogline(AS_Host *host, int target, int line)
|
|
{
|
|
unsigned long prev;
|
|
signed int ptr;
|
|
|
|
ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT;
|
|
if (ptr < 0)
|
|
ptr += STATUS_BUFFER_SIZE;
|
|
|
|
printk("%c: %3s:", target == 8 ? 'H' : '0' + target,
|
|
line == 0 ? "ph" : line == 1 ? "ssr" : "int");
|
|
|
|
prev = host->status[target][ptr].when;
|
|
|
|
for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
|
|
unsigned long time_diff;
|
|
|
|
if (!host->status[target][ptr].when)
|
|
continue;
|
|
|
|
switch (line) {
|
|
case 0:
|
|
printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ',
|
|
host->status[target][ptr].ph);
|
|
break;
|
|
|
|
case 1:
|
|
printk(" %02X", host->status[target][ptr].ssr);
|
|
break;
|
|
|
|
case 2:
|
|
time_diff = host->status[target][ptr].when - prev;
|
|
prev = host->status[target][ptr].when;
|
|
if (time_diff == 0)
|
|
printk("==^");
|
|
else if (time_diff >= 100)
|
|
printk(" ");
|
|
else
|
|
printk(" %02ld", time_diff);
|
|
break;
|
|
}
|
|
}
|
|
|
|
printk("\n");
|
|
}
|
|
|
|
static
|
|
void acornscsi_dumplog(AS_Host *host, int target)
|
|
{
|
|
do {
|
|
acornscsi_dumplogline(host, target, 0);
|
|
acornscsi_dumplogline(host, target, 1);
|
|
acornscsi_dumplogline(host, target, 2);
|
|
|
|
if (target == 8)
|
|
break;
|
|
|
|
target = 8;
|
|
} while (1);
|
|
}
|
|
|
|
static
|
|
char acornscsi_target(AS_Host *host)
|
|
{
|
|
if (host->SCpnt)
|
|
return '0' + host->SCpnt->device->id;
|
|
return 'H';
|
|
}
|
|
|
|
/*
|
|
* Prototype: cmdtype_t acornscsi_cmdtype(int command)
|
|
* Purpose : differentiate READ from WRITE from other commands
|
|
* Params : command - command to interpret
|
|
* Returns : CMD_READ - command reads data,
|
|
* CMD_WRITE - command writes data,
|
|
* CMD_MISC - everything else
|
|
*/
|
|
static inline
|
|
cmdtype_t acornscsi_cmdtype(int command)
|
|
{
|
|
switch (command) {
|
|
case WRITE_6: case WRITE_10: case WRITE_12:
|
|
return CMD_WRITE;
|
|
case READ_6: case READ_10: case READ_12:
|
|
return CMD_READ;
|
|
default:
|
|
return CMD_MISC;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Prototype: int acornscsi_datadirection(int command)
|
|
* Purpose : differentiate between commands that have a DATA IN phase
|
|
* and a DATA OUT phase
|
|
* Params : command - command to interpret
|
|
* Returns : DATADIR_OUT - data out phase expected
|
|
* DATADIR_IN - data in phase expected
|
|
*/
|
|
static
|
|
datadir_t acornscsi_datadirection(int command)
|
|
{
|
|
switch (command) {
|
|
case CHANGE_DEFINITION: case COMPARE: case COPY:
|
|
case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT:
|
|
case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER:
|
|
case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE:
|
|
case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW:
|
|
case WRITE_6: case WRITE_10: case WRITE_VERIFY:
|
|
case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME:
|
|
case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12:
|
|
case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW:
|
|
case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea:
|
|
return DATADIR_OUT;
|
|
default:
|
|
return DATADIR_IN;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Purpose : provide values for synchronous transfers with 33C93.
|
|
* Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
|
|
* Modified by Russell King for 8MHz WD33C93A
|
|
*/
|
|
static struct sync_xfer_tbl {
|
|
unsigned int period_ns;
|
|
unsigned char reg_value;
|
|
} sync_xfer_table[] = {
|
|
{ 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 },
|
|
{ 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 },
|
|
{ 874, 0x70 }, { 999, 0x00 }, { 0, 0 }
|
|
};
|
|
|
|
/*
|
|
* Prototype: int acornscsi_getperiod(unsigned char syncxfer)
|
|
* Purpose : period for the synchronous transfer setting
|
|
* Params : syncxfer SYNCXFER register value
|
|
* Returns : period in ns.
|
|
*/
|
|
static
|
|
int acornscsi_getperiod(unsigned char syncxfer)
|
|
{
|
|
int i;
|
|
|
|
syncxfer &= 0xf0;
|
|
if (syncxfer == 0x10)
|
|
syncxfer = 0;
|
|
|
|
for (i = 1; sync_xfer_table[i].period_ns; i++)
|
|
if (syncxfer == sync_xfer_table[i].reg_value)
|
|
return sync_xfer_table[i].period_ns;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Prototype: int round_period(unsigned int period)
|
|
* Purpose : return index into above table for a required REQ period
|
|
* Params : period - time (ns) for REQ
|
|
* Returns : table index
|
|
* Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
|
|
*/
|
|
static inline
|
|
int round_period(unsigned int period)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; sync_xfer_table[i].period_ns; i++) {
|
|
if ((period <= sync_xfer_table[i].period_ns) &&
|
|
(period > sync_xfer_table[i - 1].period_ns))
|
|
return i;
|
|
}
|
|
return 7;
|
|
}
|
|
|
|
/*
|
|
* Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
|
|
* Purpose : calculate value for 33c93s SYNC register
|
|
* Params : period - time (ns) for REQ
|
|
* offset - offset in bytes between REQ/ACK
|
|
* Returns : value for SYNC register
|
|
* Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
|
|
*/
|
|
static
|
|
unsigned char __maybe_unused calc_sync_xfer(unsigned int period,
|
|
unsigned int offset)
|
|
{
|
|
return sync_xfer_table[round_period(period)].reg_value |
|
|
((offset < SDTR_SIZE) ? offset : SDTR_SIZE);
|
|
}
|
|
|
|
/* ====================================================================================
|
|
* Command functions
|
|
*/
|
|
/*
|
|
* Function: acornscsi_kick(AS_Host *host)
|
|
* Purpose : kick next command to interface
|
|
* Params : host - host to send command to
|
|
* Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING
|
|
* Notes : interrupts are always disabled!
|
|
*/
|
|
static
|
|
intr_ret_t acornscsi_kick(AS_Host *host)
|
|
{
|
|
int from_queue = 0;
|
|
struct scsi_cmnd *SCpnt;
|
|
|
|
/* first check to see if a command is waiting to be executed */
|
|
SCpnt = host->origSCpnt;
|
|
host->origSCpnt = NULL;
|
|
|
|
/* retrieve next command */
|
|
if (!SCpnt) {
|
|
SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns);
|
|
if (!SCpnt)
|
|
return INTR_IDLE;
|
|
|
|
from_queue = 1;
|
|
}
|
|
|
|
if (host->scsi.disconnectable && host->SCpnt) {
|
|
queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
|
|
host->scsi.disconnectable = 0;
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n",
|
|
host->host->host_no, acornscsi_target(host)));
|
|
#endif
|
|
host->SCpnt = NULL;
|
|
}
|
|
|
|
/*
|
|
* If we have an interrupt pending, then we may have been reselected.
|
|
* In this case, we don't want to write to the registers
|
|
*/
|
|
if (!(sbic_arm_read(host, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) {
|
|
sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id);
|
|
sbic_arm_write(host, SBIC_CMND, CMND_SELWITHATN);
|
|
}
|
|
|
|
/*
|
|
* claim host busy - all of these must happen atomically wrt
|
|
* our interrupt routine. Failure means command loss.
|
|
*/
|
|
host->scsi.phase = PHASE_CONNECTING;
|
|
host->SCpnt = SCpnt;
|
|
host->scsi.SCp = SCpnt->SCp;
|
|
host->dma.xfer_setup = 0;
|
|
host->dma.xfer_required = 0;
|
|
host->dma.xfer_done = 0;
|
|
|
|
#if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT))
|
|
DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n",
|
|
host->host->host_no, '0' + SCpnt->device->id,
|
|
SCpnt->cmnd[0]));
|
|
#endif
|
|
|
|
if (from_queue) {
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
/*
|
|
* tagged queueing - allocate a new tag to this command
|
|
*/
|
|
if (SCpnt->device->simple_tags) {
|
|
SCpnt->device->current_tag += 1;
|
|
if (SCpnt->device->current_tag == 0)
|
|
SCpnt->device->current_tag = 1;
|
|
SCpnt->tag = SCpnt->device->current_tag;
|
|
} else
|
|
#endif
|
|
set_bit(SCpnt->device->id * 8 +
|
|
(u8)(SCpnt->device->lun & 0x07), host->busyluns);
|
|
|
|
host->stats.removes += 1;
|
|
|
|
switch (acornscsi_cmdtype(SCpnt->cmnd[0])) {
|
|
case CMD_WRITE:
|
|
host->stats.writes += 1;
|
|
break;
|
|
case CMD_READ:
|
|
host->stats.reads += 1;
|
|
break;
|
|
case CMD_MISC:
|
|
host->stats.miscs += 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return INTR_PROCESSING;
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result)
|
|
* Purpose : complete processing for command
|
|
* Params : host - interface that completed
|
|
* result - driver byte of result
|
|
*/
|
|
static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
|
|
unsigned int result)
|
|
{
|
|
struct scsi_cmnd *SCpnt = *SCpntp;
|
|
|
|
/* clean up */
|
|
sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
|
|
|
|
host->stats.fins += 1;
|
|
|
|
if (SCpnt) {
|
|
*SCpntp = NULL;
|
|
|
|
acornscsi_dma_cleanup(host);
|
|
|
|
SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status;
|
|
|
|
/*
|
|
* In theory, this should not happen. In practice, it seems to.
|
|
* Only trigger an error if the device attempts to report all happy
|
|
* but with untransferred buffers... If we don't do something, then
|
|
* data loss will occur. Should we check SCpnt->underflow here?
|
|
* It doesn't appear to be set to something meaningful by the higher
|
|
* levels all the time.
|
|
*/
|
|
if (result == DID_OK) {
|
|
int xfer_warn = 0;
|
|
|
|
if (SCpnt->underflow == 0) {
|
|
if (host->scsi.SCp.ptr &&
|
|
acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC)
|
|
xfer_warn = 1;
|
|
} else {
|
|
if (host->scsi.SCp.scsi_xferred < SCpnt->underflow ||
|
|
host->scsi.SCp.scsi_xferred != host->dma.transferred)
|
|
xfer_warn = 1;
|
|
}
|
|
|
|
/* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6)
|
|
* Targets which break data transfers into multiple
|
|
* connections shall end each successful connection
|
|
* (except possibly the last) with a SAVE DATA
|
|
* POINTER - DISCONNECT message sequence.
|
|
*
|
|
* This makes it difficult to ensure that a transfer has
|
|
* completed. If we reach the end of a transfer during
|
|
* the command, then we can only have finished the transfer.
|
|
* therefore, if we seem to have some data remaining, this
|
|
* is not a problem.
|
|
*/
|
|
if (host->dma.xfer_done)
|
|
xfer_warn = 0;
|
|
|
|
if (xfer_warn) {
|
|
switch (status_byte(SCpnt->result)) {
|
|
case CHECK_CONDITION:
|
|
case COMMAND_TERMINATED:
|
|
case BUSY:
|
|
case QUEUE_FULL:
|
|
case RESERVATION_CONFLICT:
|
|
break;
|
|
|
|
default:
|
|
scmd_printk(KERN_ERR, SCpnt,
|
|
"incomplete data transfer detected: "
|
|
"result=%08X", SCpnt->result);
|
|
scsi_print_command(SCpnt);
|
|
acornscsi_dumpdma(host, "done");
|
|
acornscsi_dumplog(host, SCpnt->device->id);
|
|
set_host_byte(SCpnt, DID_ERROR);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!SCpnt->scsi_done)
|
|
panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no);
|
|
|
|
clear_bit(SCpnt->device->id * 8 +
|
|
(u8)(SCpnt->device->lun & 0x7), host->busyluns);
|
|
|
|
SCpnt->scsi_done(SCpnt);
|
|
} else
|
|
printk("scsi%d: null command in acornscsi_done", host->host->host_no);
|
|
|
|
host->scsi.phase = PHASE_IDLE;
|
|
}
|
|
|
|
/* ====================================================================================
|
|
* DMA routines
|
|
*/
|
|
/*
|
|
* Purpose : update SCSI Data Pointer
|
|
* Notes : this will only be one SG entry or less
|
|
*/
|
|
static
|
|
void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length)
|
|
{
|
|
SCp->ptr += length;
|
|
SCp->this_residual -= length;
|
|
|
|
if (SCp->this_residual == 0 && next_SCp(SCp) == 0)
|
|
host->dma.xfer_done = 1;
|
|
}
|
|
|
|
/*
|
|
* Prototype: void acornscsi_data_read(AS_Host *host, char *ptr,
|
|
* unsigned int start_addr, unsigned int length)
|
|
* Purpose : read data from DMA RAM
|
|
* Params : host - host to transfer from
|
|
* ptr - DRAM address
|
|
* start_addr - host mem address
|
|
* length - number of bytes to transfer
|
|
* Notes : this will only be one SG entry or less
|
|
*/
|
|
static
|
|
void acornscsi_data_read(AS_Host *host, char *ptr,
|
|
unsigned int start_addr, unsigned int length)
|
|
{
|
|
extern void __acornscsi_in(void __iomem *, char *buf, int len);
|
|
unsigned int page, offset, len = length;
|
|
|
|
page = (start_addr >> 12);
|
|
offset = start_addr & ((1 << 12) - 1);
|
|
|
|
writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
|
|
|
|
while (len > 0) {
|
|
unsigned int this_len;
|
|
|
|
if (len + offset > (1 << 12))
|
|
this_len = (1 << 12) - offset;
|
|
else
|
|
this_len = len;
|
|
|
|
__acornscsi_in(host->base + (offset << 1), ptr, this_len);
|
|
|
|
offset += this_len;
|
|
ptr += this_len;
|
|
len -= this_len;
|
|
|
|
if (offset == (1 << 12)) {
|
|
offset = 0;
|
|
page ++;
|
|
writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
|
|
}
|
|
}
|
|
writeb(host->card.page_reg, host->fast + PAGE_REG);
|
|
}
|
|
|
|
/*
|
|
* Prototype: void acornscsi_data_write(AS_Host *host, char *ptr,
|
|
* unsigned int start_addr, unsigned int length)
|
|
* Purpose : write data to DMA RAM
|
|
* Params : host - host to transfer from
|
|
* ptr - DRAM address
|
|
* start_addr - host mem address
|
|
* length - number of bytes to transfer
|
|
* Notes : this will only be one SG entry or less
|
|
*/
|
|
static
|
|
void acornscsi_data_write(AS_Host *host, char *ptr,
|
|
unsigned int start_addr, unsigned int length)
|
|
{
|
|
extern void __acornscsi_out(void __iomem *, char *buf, int len);
|
|
unsigned int page, offset, len = length;
|
|
|
|
page = (start_addr >> 12);
|
|
offset = start_addr & ((1 << 12) - 1);
|
|
|
|
writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
|
|
|
|
while (len > 0) {
|
|
unsigned int this_len;
|
|
|
|
if (len + offset > (1 << 12))
|
|
this_len = (1 << 12) - offset;
|
|
else
|
|
this_len = len;
|
|
|
|
__acornscsi_out(host->base + (offset << 1), ptr, this_len);
|
|
|
|
offset += this_len;
|
|
ptr += this_len;
|
|
len -= this_len;
|
|
|
|
if (offset == (1 << 12)) {
|
|
offset = 0;
|
|
page ++;
|
|
writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
|
|
}
|
|
}
|
|
writeb(host->card.page_reg, host->fast + PAGE_REG);
|
|
}
|
|
|
|
/* =========================================================================================
|
|
* On-board DMA routines
|
|
*/
|
|
#ifdef USE_DMAC
|
|
/*
|
|
* Prototype: void acornscsi_dmastop(AS_Host *host)
|
|
* Purpose : stop all DMA
|
|
* Params : host - host on which to stop DMA
|
|
* Notes : This is called when leaving DATA IN/OUT phase,
|
|
* or when interface is RESET
|
|
*/
|
|
static inline
|
|
void acornscsi_dma_stop(AS_Host *host)
|
|
{
|
|
dmac_write(host, DMAC_MASKREG, MASK_ON);
|
|
dmac_clearintr(host);
|
|
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "stop"));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
|
|
* Purpose : setup DMA controller for data transfer
|
|
* Params : host - host to setup
|
|
* direction - data transfer direction
|
|
* Notes : This is called when entering DATA I/O phase, not
|
|
* while we're in a DATA I/O phase
|
|
*/
|
|
static
|
|
void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
|
|
{
|
|
unsigned int address, length, mode;
|
|
|
|
host->dma.direction = direction;
|
|
|
|
dmac_write(host, DMAC_MASKREG, MASK_ON);
|
|
|
|
if (direction == DMA_OUT) {
|
|
#if (DEBUG & DEBUG_NO_WRITE)
|
|
if (NO_WRITE & (1 << host->SCpnt->device->id)) {
|
|
printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
return;
|
|
}
|
|
#endif
|
|
mode = DMAC_WRITE;
|
|
} else
|
|
mode = DMAC_READ;
|
|
|
|
/*
|
|
* Allocate some buffer space, limited to half the buffer size
|
|
*/
|
|
length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
|
|
if (length) {
|
|
host->dma.start_addr = address = host->dma.free_addr;
|
|
host->dma.free_addr = (host->dma.free_addr + length) &
|
|
(DMAC_BUFFER_SIZE - 1);
|
|
|
|
/*
|
|
* Transfer data to DMA memory
|
|
*/
|
|
if (direction == DMA_OUT)
|
|
acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
|
|
length);
|
|
|
|
length -= 1;
|
|
dmac_write(host, DMAC_TXCNTLO, length);
|
|
dmac_write(host, DMAC_TXCNTHI, length >> 8);
|
|
dmac_write(host, DMAC_TXADRLO, address);
|
|
dmac_write(host, DMAC_TXADRMD, address >> 8);
|
|
dmac_write(host, DMAC_TXADRHI, 0);
|
|
dmac_write(host, DMAC_MODECON, mode);
|
|
dmac_write(host, DMAC_MASKREG, MASK_OFF);
|
|
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "strt"));
|
|
#endif
|
|
host->dma.xfer_setup = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_dma_cleanup(AS_Host *host)
|
|
* Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct
|
|
* Params : host - host to finish
|
|
* Notes : This is called when a command is:
|
|
* terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT
|
|
* : This must not return until all transfers are completed.
|
|
*/
|
|
static
|
|
void acornscsi_dma_cleanup(AS_Host *host)
|
|
{
|
|
dmac_write(host, DMAC_MASKREG, MASK_ON);
|
|
dmac_clearintr(host);
|
|
|
|
/*
|
|
* Check for a pending transfer
|
|
*/
|
|
if (host->dma.xfer_required) {
|
|
host->dma.xfer_required = 0;
|
|
if (host->dma.direction == DMA_IN)
|
|
acornscsi_data_read(host, host->dma.xfer_ptr,
|
|
host->dma.xfer_start, host->dma.xfer_length);
|
|
}
|
|
|
|
/*
|
|
* Has a transfer been setup?
|
|
*/
|
|
if (host->dma.xfer_setup) {
|
|
unsigned int transferred;
|
|
|
|
host->dma.xfer_setup = 0;
|
|
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi"));
|
|
#endif
|
|
|
|
/*
|
|
* Calculate number of bytes transferred from DMA.
|
|
*/
|
|
transferred = dmac_address(host) - host->dma.start_addr;
|
|
host->dma.transferred += transferred;
|
|
|
|
if (host->dma.direction == DMA_IN)
|
|
acornscsi_data_read(host, host->scsi.SCp.ptr,
|
|
host->dma.start_addr, transferred);
|
|
|
|
/*
|
|
* Update SCSI pointers
|
|
*/
|
|
acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo"));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_dmacintr(AS_Host *host)
|
|
* Purpose : handle interrupts from DMAC device
|
|
* Params : host - host to process
|
|
* Notes : If reading, we schedule the read to main memory &
|
|
* allow the transfer to continue.
|
|
* : If writing, we fill the onboard DMA memory from main
|
|
* memory.
|
|
* : Called whenever DMAC finished it's current transfer.
|
|
*/
|
|
static
|
|
void acornscsi_dma_intr(AS_Host *host)
|
|
{
|
|
unsigned int address, length, transferred;
|
|
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "inti"));
|
|
#endif
|
|
|
|
dmac_write(host, DMAC_MASKREG, MASK_ON);
|
|
dmac_clearintr(host);
|
|
|
|
/*
|
|
* Calculate amount transferred via DMA
|
|
*/
|
|
transferred = dmac_address(host) - host->dma.start_addr;
|
|
host->dma.transferred += transferred;
|
|
|
|
/*
|
|
* Schedule DMA transfer off board
|
|
*/
|
|
if (host->dma.direction == DMA_IN) {
|
|
host->dma.xfer_start = host->dma.start_addr;
|
|
host->dma.xfer_length = transferred;
|
|
host->dma.xfer_ptr = host->scsi.SCp.ptr;
|
|
host->dma.xfer_required = 1;
|
|
}
|
|
|
|
acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
|
|
|
|
/*
|
|
* Allocate some buffer space, limited to half the on-board RAM size
|
|
*/
|
|
length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
|
|
if (length) {
|
|
host->dma.start_addr = address = host->dma.free_addr;
|
|
host->dma.free_addr = (host->dma.free_addr + length) &
|
|
(DMAC_BUFFER_SIZE - 1);
|
|
|
|
/*
|
|
* Transfer data to DMA memory
|
|
*/
|
|
if (host->dma.direction == DMA_OUT)
|
|
acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
|
|
length);
|
|
|
|
length -= 1;
|
|
dmac_write(host, DMAC_TXCNTLO, length);
|
|
dmac_write(host, DMAC_TXCNTHI, length >> 8);
|
|
dmac_write(host, DMAC_TXADRLO, address);
|
|
dmac_write(host, DMAC_TXADRMD, address >> 8);
|
|
dmac_write(host, DMAC_TXADRHI, 0);
|
|
dmac_write(host, DMAC_MASKREG, MASK_OFF);
|
|
|
|
#if (DEBUG & DEBUG_DMA)
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "into"));
|
|
#endif
|
|
} else {
|
|
host->dma.xfer_setup = 0;
|
|
#if 0
|
|
/*
|
|
* If the interface still wants more, then this is an error.
|
|
* We give it another byte, but we also attempt to raise an
|
|
* attention condition. We continue giving one byte until
|
|
* the device recognises the attention.
|
|
*/
|
|
if (dmac_read(host, DMAC_STATUS) & STATUS_RQ0) {
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
|
|
dmac_write(host, DMAC_TXCNTLO, 0);
|
|
dmac_write(host, DMAC_TXCNTHI, 0);
|
|
dmac_write(host, DMAC_TXADRLO, 0);
|
|
dmac_write(host, DMAC_TXADRMD, 0);
|
|
dmac_write(host, DMAC_TXADRHI, 0);
|
|
dmac_write(host, DMAC_MASKREG, MASK_OFF);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_dma_xfer(AS_Host *host)
|
|
* Purpose : transfer data between AcornSCSI and memory
|
|
* Params : host - host to process
|
|
*/
|
|
static
|
|
void acornscsi_dma_xfer(AS_Host *host)
|
|
{
|
|
host->dma.xfer_required = 0;
|
|
|
|
if (host->dma.direction == DMA_IN)
|
|
acornscsi_data_read(host, host->dma.xfer_ptr,
|
|
host->dma.xfer_start, host->dma.xfer_length);
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_dma_adjust(AS_Host *host)
|
|
* Purpose : adjust DMA pointers & count for bytes transferred to
|
|
* SBIC but not SCSI bus.
|
|
* Params : host - host to adjust DMA count for
|
|
*/
|
|
static
|
|
void acornscsi_dma_adjust(AS_Host *host)
|
|
{
|
|
if (host->dma.xfer_setup) {
|
|
signed long transferred;
|
|
#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "adji"));
|
|
#endif
|
|
/*
|
|
* Calculate correct DMA address - DMA is ahead of SCSI bus while
|
|
* writing.
|
|
* host->scsi.SCp.scsi_xferred is the number of bytes
|
|
* actually transferred to/from the SCSI bus.
|
|
* host->dma.transferred is the number of bytes transferred
|
|
* over DMA since host->dma.start_addr was last set.
|
|
*
|
|
* real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred
|
|
* - host->dma.transferred
|
|
*/
|
|
transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred;
|
|
if (transferred < 0)
|
|
printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n",
|
|
host->host->host_no, acornscsi_target(host), transferred);
|
|
else if (transferred == 0)
|
|
host->dma.xfer_setup = 0;
|
|
else {
|
|
transferred += host->dma.start_addr;
|
|
dmac_write(host, DMAC_TXADRLO, transferred);
|
|
dmac_write(host, DMAC_TXADRMD, transferred >> 8);
|
|
dmac_write(host, DMAC_TXADRHI, transferred >> 16);
|
|
#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
|
|
DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo"));
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* =========================================================================================
|
|
* Data I/O
|
|
*/
|
|
static int
|
|
acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout)
|
|
{
|
|
unsigned int asr, timeout = max_timeout;
|
|
int my_ptr = *ptr;
|
|
|
|
while (my_ptr < len) {
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
|
|
if (asr & ASR_DBR) {
|
|
timeout = max_timeout;
|
|
|
|
sbic_arm_write(host, SBIC_DATA, bytes[my_ptr++]);
|
|
} else if (asr & ASR_INT)
|
|
break;
|
|
else if (--timeout == 0)
|
|
break;
|
|
udelay(1);
|
|
}
|
|
|
|
*ptr = my_ptr;
|
|
|
|
return (timeout == 0) ? -1 : 0;
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_sendcommand(AS_Host *host)
|
|
* Purpose : send a command to a target
|
|
* Params : host - host which is connected to target
|
|
*/
|
|
static void
|
|
acornscsi_sendcommand(AS_Host *host)
|
|
{
|
|
struct scsi_cmnd *SCpnt = host->SCpnt;
|
|
|
|
sbic_arm_write(host, SBIC_TRANSCNTH, 0);
|
|
sbic_arm_writenext(host, 0);
|
|
sbic_arm_writenext(host, SCpnt->cmd_len - host->scsi.SCp.sent_command);
|
|
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
|
|
|
|
if (acornscsi_write_pio(host, SCpnt->cmnd,
|
|
(int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000))
|
|
printk("scsi%d: timeout while sending command\n", host->host->host_no);
|
|
|
|
host->scsi.phase = PHASE_COMMAND;
|
|
}
|
|
|
|
static
|
|
void acornscsi_sendmessage(AS_Host *host)
|
|
{
|
|
unsigned int message_length = msgqueue_msglength(&host->scsi.msgs);
|
|
unsigned int msgnr;
|
|
struct message *msg;
|
|
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
printk("scsi%d.%c: sending message ",
|
|
host->host->host_no, acornscsi_target(host));
|
|
#endif
|
|
|
|
switch (message_length) {
|
|
case 0:
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
|
|
|
|
acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1");
|
|
|
|
sbic_arm_write(host, SBIC_DATA, NOP);
|
|
|
|
host->scsi.last_message = NOP;
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
printk("NOP");
|
|
#endif
|
|
break;
|
|
|
|
case 1:
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
|
|
msg = msgqueue_getmsg(&host->scsi.msgs, 0);
|
|
|
|
acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2");
|
|
|
|
sbic_arm_write(host, SBIC_DATA, msg->msg[0]);
|
|
|
|
host->scsi.last_message = msg->msg[0];
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
spi_print_msg(msg->msg);
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14)
|
|
* 'When a target sends this (MESSAGE_REJECT) message, it
|
|
* shall change to MESSAGE IN phase and send this message
|
|
* prior to requesting additional message bytes from the
|
|
* initiator. This provides an interlock so that the
|
|
* initiator can determine which message byte is rejected.
|
|
*/
|
|
sbic_arm_write(host, SBIC_TRANSCNTH, 0);
|
|
sbic_arm_writenext(host, 0);
|
|
sbic_arm_writenext(host, message_length);
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
|
|
|
|
msgnr = 0;
|
|
while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) {
|
|
unsigned int i;
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
spi_print_msg(msg);
|
|
#endif
|
|
i = 0;
|
|
if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000))
|
|
printk("scsi%d: timeout while sending message\n", host->host->host_no);
|
|
|
|
host->scsi.last_message = msg->msg[0];
|
|
if (msg->msg[0] == EXTENDED_MESSAGE)
|
|
host->scsi.last_message |= msg->msg[2] << 8;
|
|
|
|
if (i != msg->length)
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
printk("\n");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_readstatusbyte(AS_Host *host)
|
|
* Purpose : Read status byte from connected target
|
|
* Params : host - host connected to target
|
|
*/
|
|
static
|
|
void acornscsi_readstatusbyte(AS_Host *host)
|
|
{
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT);
|
|
acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte");
|
|
host->scsi.SCp.Status = sbic_arm_read(host, SBIC_DATA);
|
|
}
|
|
|
|
/*
|
|
* Function: unsigned char acornscsi_readmessagebyte(AS_Host *host)
|
|
* Purpose : Read one message byte from connected target
|
|
* Params : host - host connected to target
|
|
*/
|
|
static
|
|
unsigned char acornscsi_readmessagebyte(AS_Host *host)
|
|
{
|
|
unsigned char message;
|
|
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
|
|
|
|
acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte");
|
|
|
|
message = sbic_arm_read(host, SBIC_DATA);
|
|
|
|
/* wait for MSGIN-XFER-PAUSED */
|
|
acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte");
|
|
|
|
sbic_arm_read(host, SBIC_SSR);
|
|
|
|
return message;
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_message(AS_Host *host)
|
|
* Purpose : Read complete message from connected target & action message
|
|
* Params : host - host connected to target
|
|
*/
|
|
static
|
|
void acornscsi_message(AS_Host *host)
|
|
{
|
|
unsigned char message[16];
|
|
unsigned int msgidx = 0, msglen = 1;
|
|
|
|
do {
|
|
message[msgidx] = acornscsi_readmessagebyte(host);
|
|
|
|
switch (msgidx) {
|
|
case 0:
|
|
if (message[0] == EXTENDED_MESSAGE ||
|
|
(message[0] >= 0x20 && message[0] <= 0x2f))
|
|
msglen = 2;
|
|
break;
|
|
|
|
case 1:
|
|
if (message[0] == EXTENDED_MESSAGE)
|
|
msglen += message[msgidx];
|
|
break;
|
|
}
|
|
msgidx += 1;
|
|
if (msgidx < msglen) {
|
|
acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
|
|
|
|
/* wait for next msg-in */
|
|
acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack");
|
|
sbic_arm_read(host, SBIC_SSR);
|
|
}
|
|
} while (msgidx < msglen);
|
|
|
|
#if (DEBUG & DEBUG_MESSAGES)
|
|
printk("scsi%d.%c: message in: ",
|
|
host->host->host_no, acornscsi_target(host));
|
|
spi_print_msg(message);
|
|
printk("\n");
|
|
#endif
|
|
|
|
if (host->scsi.phase == PHASE_RECONNECTED) {
|
|
/*
|
|
* ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17)
|
|
* 'Whenever a target reconnects to an initiator to continue
|
|
* a tagged I/O process, the SIMPLE QUEUE TAG message shall
|
|
* be sent immediately following the IDENTIFY message...'
|
|
*/
|
|
if (message[0] == SIMPLE_QUEUE_TAG)
|
|
host->scsi.reconnected.tag = message[1];
|
|
if (acornscsi_reconnect_finish(host))
|
|
host->scsi.phase = PHASE_MSGIN;
|
|
}
|
|
|
|
switch (message[0]) {
|
|
case ABORT:
|
|
case ABORT_TAG:
|
|
case COMMAND_COMPLETE:
|
|
if (host->scsi.phase != PHASE_STATUSIN) {
|
|
printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
acornscsi_dumplog(host, host->SCpnt->device->id);
|
|
}
|
|
host->scsi.phase = PHASE_DONE;
|
|
host->scsi.SCp.Message = message[0];
|
|
break;
|
|
|
|
case SAVE_POINTERS:
|
|
/*
|
|
* ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20)
|
|
* 'The SAVE DATA POINTER message is sent from a target to
|
|
* direct the initiator to copy the active data pointer to
|
|
* the saved data pointer for the current I/O process.
|
|
*/
|
|
acornscsi_dma_cleanup(host);
|
|
host->SCpnt->SCp = host->scsi.SCp;
|
|
host->SCpnt->SCp.sent_command = 0;
|
|
host->scsi.phase = PHASE_MSGIN;
|
|
break;
|
|
|
|
case RESTORE_POINTERS:
|
|
/*
|
|
* ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19)
|
|
* 'The RESTORE POINTERS message is sent from a target to
|
|
* direct the initiator to copy the most recently saved
|
|
* command, data, and status pointers for the I/O process
|
|
* to the corresponding active pointers. The command and
|
|
* status pointers shall be restored to the beginning of
|
|
* the present command and status areas.'
|
|
*/
|
|
acornscsi_dma_cleanup(host);
|
|
host->scsi.SCp = host->SCpnt->SCp;
|
|
host->scsi.phase = PHASE_MSGIN;
|
|
break;
|
|
|
|
case DISCONNECT:
|
|
/*
|
|
* ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2)
|
|
* 'On those occasions when an error or exception condition occurs
|
|
* and the target elects to repeat the information transfer, the
|
|
* target may repeat the transfer either issuing a RESTORE POINTERS
|
|
* message or by disconnecting without issuing a SAVE POINTERS
|
|
* message. When reconnection is completed, the most recent
|
|
* saved pointer values are restored.'
|
|
*/
|
|
acornscsi_dma_cleanup(host);
|
|
host->scsi.phase = PHASE_DISCONNECT;
|
|
break;
|
|
|
|
case MESSAGE_REJECT:
|
|
#if 0 /* this isn't needed any more */
|
|
/*
|
|
* If we were negociating sync transfer, we don't yet know if
|
|
* this REJECT is for the sync transfer or for the tagged queue/wide
|
|
* transfer. Re-initiate sync transfer negotiation now, and if
|
|
* we got a REJECT in response to SDTR, then it'll be set to DONE.
|
|
*/
|
|
if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST)
|
|
host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE;
|
|
#endif
|
|
|
|
/*
|
|
* If we have any messages waiting to go out, then assert ATN now
|
|
*/
|
|
if (msgqueue_msglength(&host->scsi.msgs))
|
|
acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
|
|
|
|
switch (host->scsi.last_message) {
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
case HEAD_OF_QUEUE_TAG:
|
|
case ORDERED_QUEUE_TAG:
|
|
case SIMPLE_QUEUE_TAG:
|
|
/*
|
|
* ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17)
|
|
* If a target does not implement tagged queuing and a queue tag
|
|
* message is received, it shall respond with a MESSAGE REJECT
|
|
* message and accept the I/O process as if it were untagged.
|
|
*/
|
|
printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
host->SCpnt->device->simple_tags = 0;
|
|
set_bit(host->SCpnt->device->id * 8 +
|
|
(u8)(host->SCpnt->device->lun & 0x7), host->busyluns);
|
|
break;
|
|
#endif
|
|
case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8):
|
|
/*
|
|
* Target can't handle synchronous transfers
|
|
*/
|
|
printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA;
|
|
host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS;
|
|
sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case QUEUE_FULL:
|
|
/* TODO: target queue is full */
|
|
break;
|
|
|
|
case SIMPLE_QUEUE_TAG:
|
|
/* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */
|
|
printk("scsi%d.%c: reconnect queue tag %02X\n",
|
|
host->host->host_no, acornscsi_target(host),
|
|
message[1]);
|
|
break;
|
|
|
|
case EXTENDED_MESSAGE:
|
|
switch (message[2]) {
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
|
|
case EXTENDED_SDTR:
|
|
if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) {
|
|
/*
|
|
* We requested synchronous transfers. This isn't quite right...
|
|
* We can only say if this succeeded if we proceed on to execute the
|
|
* command from this message. If we get a MESSAGE PARITY ERROR,
|
|
* and the target retries fail, then we fallback to asynchronous mode
|
|
*/
|
|
host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED;
|
|
printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n",
|
|
host->host->host_no, acornscsi_target(host),
|
|
message[4], message[3] * 4);
|
|
host->device[host->SCpnt->device->id].sync_xfer =
|
|
calc_sync_xfer(message[3] * 4, message[4]);
|
|
} else {
|
|
unsigned char period, length;
|
|
/*
|
|
* Target requested synchronous transfers. The agreement is only
|
|
* to be in operation AFTER the target leaves message out phase.
|
|
*/
|
|
acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
|
|
period = max_t(unsigned int, message[3], sdtr_period / 4);
|
|
length = min_t(unsigned int, message[4], sdtr_size);
|
|
msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3,
|
|
EXTENDED_SDTR, period, length);
|
|
host->device[host->SCpnt->device->id].sync_xfer =
|
|
calc_sync_xfer(period * 4, length);
|
|
}
|
|
sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
|
|
break;
|
|
#else
|
|
/* We do not accept synchronous transfers. Respond with a
|
|
* MESSAGE_REJECT.
|
|
*/
|
|
#endif
|
|
|
|
case EXTENDED_WDTR:
|
|
/* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT
|
|
* to a wide data transfer request.
|
|
*/
|
|
default:
|
|
acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default: /* reject message */
|
|
printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n",
|
|
host->host->host_no, acornscsi_target(host),
|
|
message[0]);
|
|
acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
|
|
host->scsi.phase = PHASE_MSGIN;
|
|
break;
|
|
}
|
|
acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
|
|
}
|
|
|
|
/*
|
|
* Function: int acornscsi_buildmessages(AS_Host *host)
|
|
* Purpose : build the connection messages for a host
|
|
* Params : host - host to add messages to
|
|
*/
|
|
static
|
|
void acornscsi_buildmessages(AS_Host *host)
|
|
{
|
|
#if 0
|
|
/* does the device need resetting? */
|
|
if (cmd_reset) {
|
|
msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
msgqueue_addmsg(&host->scsi.msgs, 1,
|
|
IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok,
|
|
host->SCpnt->device->lun));
|
|
|
|
#if 0
|
|
/* does the device need the current command aborted */
|
|
if (cmd_aborted) {
|
|
acornscsi_abortcmd(host->SCpnt->tag);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
if (host->SCpnt->tag) {
|
|
unsigned int tag_type;
|
|
|
|
if (host->SCpnt->cmnd[0] == REQUEST_SENSE ||
|
|
host->SCpnt->cmnd[0] == TEST_UNIT_READY ||
|
|
host->SCpnt->cmnd[0] == INQUIRY)
|
|
tag_type = HEAD_OF_QUEUE_TAG;
|
|
else
|
|
tag_type = SIMPLE_QUEUE_TAG;
|
|
msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
|
|
if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) {
|
|
host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST;
|
|
msgqueue_addmsg(&host->scsi.msgs, 5,
|
|
EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
|
|
sdtr_period / 4, sdtr_size);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Function: int acornscsi_starttransfer(AS_Host *host)
|
|
* Purpose : transfer data to/from connected target
|
|
* Params : host - host to which target is connected
|
|
* Returns : 0 if failure
|
|
*/
|
|
static
|
|
int acornscsi_starttransfer(AS_Host *host)
|
|
{
|
|
int residual;
|
|
|
|
if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) {
|
|
printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
return 0;
|
|
}
|
|
|
|
residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred;
|
|
|
|
sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
|
|
sbic_arm_writenext(host, residual >> 16);
|
|
sbic_arm_writenext(host, residual >> 8);
|
|
sbic_arm_writenext(host, residual);
|
|
acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
|
|
return 1;
|
|
}
|
|
|
|
/* =========================================================================================
|
|
* Connection & Disconnection
|
|
*/
|
|
/*
|
|
* Function : acornscsi_reconnect(AS_Host *host)
|
|
* Purpose : reconnect a previously disconnected command
|
|
* Params : host - host specific data
|
|
* Remarks : SCSI spec says:
|
|
* 'The set of active pointers is restored from the set
|
|
* of saved pointers upon reconnection of the I/O process'
|
|
*/
|
|
static
|
|
int acornscsi_reconnect(AS_Host *host)
|
|
{
|
|
unsigned int target, lun, ok = 0;
|
|
|
|
target = sbic_arm_read(host, SBIC_SOURCEID);
|
|
|
|
if (!(target & 8))
|
|
printk(KERN_ERR "scsi%d: invalid source id after reselection "
|
|
"- device fault?\n",
|
|
host->host->host_no);
|
|
|
|
target &= 7;
|
|
|
|
if (host->SCpnt && !host->scsi.disconnectable) {
|
|
printk(KERN_ERR "scsi%d.%d: reconnected while command in "
|
|
"progress to target %d?\n",
|
|
host->host->host_no, target, host->SCpnt->device->id);
|
|
host->SCpnt = NULL;
|
|
}
|
|
|
|
lun = sbic_arm_read(host, SBIC_DATA) & 7;
|
|
|
|
host->scsi.reconnected.target = target;
|
|
host->scsi.reconnected.lun = lun;
|
|
host->scsi.reconnected.tag = 0;
|
|
|
|
if (host->scsi.disconnectable && host->SCpnt &&
|
|
host->SCpnt->device->id == target && host->SCpnt->device->lun == lun)
|
|
ok = 1;
|
|
|
|
if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun))
|
|
ok = 1;
|
|
|
|
ADD_STATUS(target, 0x81, host->scsi.phase, 0);
|
|
|
|
if (ok) {
|
|
host->scsi.phase = PHASE_RECONNECTED;
|
|
} else {
|
|
/* this doesn't seem to work */
|
|
printk(KERN_ERR "scsi%d.%c: reselected with no command "
|
|
"to reconnect with\n",
|
|
host->host->host_no, '0' + target);
|
|
acornscsi_dumplog(host, target);
|
|
acornscsi_abortcmd(host, 0);
|
|
if (host->SCpnt) {
|
|
queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
|
|
host->SCpnt = NULL;
|
|
}
|
|
}
|
|
acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
|
|
return !ok;
|
|
}
|
|
|
|
/*
|
|
* Function: int acornscsi_reconect_finish(AS_Host *host)
|
|
* Purpose : finish reconnecting a command
|
|
* Params : host - host to complete
|
|
* Returns : 0 if failed
|
|
*/
|
|
static
|
|
int acornscsi_reconnect_finish(AS_Host *host)
|
|
{
|
|
if (host->scsi.disconnectable && host->SCpnt) {
|
|
host->scsi.disconnectable = 0;
|
|
if (host->SCpnt->device->id == host->scsi.reconnected.target &&
|
|
host->SCpnt->device->lun == host->scsi.reconnected.lun &&
|
|
host->SCpnt->tag == host->scsi.reconnected.tag) {
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
DBG(host->SCpnt, printk("scsi%d.%c: reconnected",
|
|
host->host->host_no, acornscsi_target(host)));
|
|
#endif
|
|
} else {
|
|
queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
DBG(host->SCpnt, printk("scsi%d.%c: had to move command "
|
|
"to disconnected queue\n",
|
|
host->host->host_no, acornscsi_target(host)));
|
|
#endif
|
|
host->SCpnt = NULL;
|
|
}
|
|
}
|
|
if (!host->SCpnt) {
|
|
host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected,
|
|
host->scsi.reconnected.target,
|
|
host->scsi.reconnected.lun,
|
|
host->scsi.reconnected.tag);
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
DBG(host->SCpnt, printk("scsi%d.%c: had to get command",
|
|
host->host->host_no, acornscsi_target(host)));
|
|
#endif
|
|
}
|
|
|
|
if (!host->SCpnt)
|
|
acornscsi_abortcmd(host, host->scsi.reconnected.tag);
|
|
else {
|
|
/*
|
|
* Restore data pointer from SAVED pointers.
|
|
*/
|
|
host->scsi.SCp = host->SCpnt->SCp;
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
printk(", data pointers: [%p, %X]",
|
|
host->scsi.SCp.ptr, host->scsi.SCp.this_residual);
|
|
#endif
|
|
}
|
|
#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
|
|
printk("\n");
|
|
#endif
|
|
|
|
host->dma.transferred = host->scsi.SCp.scsi_xferred;
|
|
|
|
return host->SCpnt != NULL;
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_disconnect_unexpected(AS_Host *host)
|
|
* Purpose : handle an unexpected disconnect
|
|
* Params : host - host on which disconnect occurred
|
|
*/
|
|
static
|
|
void acornscsi_disconnect_unexpected(AS_Host *host)
|
|
{
|
|
printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
#if (DEBUG & DEBUG_ABORT)
|
|
acornscsi_dumplog(host, 8);
|
|
#endif
|
|
|
|
acornscsi_done(host, &host->SCpnt, DID_ERROR);
|
|
}
|
|
|
|
/*
|
|
* Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag)
|
|
* Purpose : abort a currently executing command
|
|
* Params : host - host with connected command to abort
|
|
* tag - tag to abort
|
|
*/
|
|
static
|
|
void acornscsi_abortcmd(AS_Host *host, unsigned char tag)
|
|
{
|
|
host->scsi.phase = PHASE_ABORTED;
|
|
sbic_arm_write(host, SBIC_CMND, CMND_ASSERTATN);
|
|
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
if (tag)
|
|
msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag);
|
|
else
|
|
#endif
|
|
msgqueue_addmsg(&host->scsi.msgs, 1, ABORT);
|
|
}
|
|
|
|
/* ==========================================================================================
|
|
* Interrupt routines.
|
|
*/
|
|
/*
|
|
* Function: int acornscsi_sbicintr(AS_Host *host)
|
|
* Purpose : handle interrupts from SCSI device
|
|
* Params : host - host to process
|
|
* Returns : INTR_PROCESS if expecting another SBIC interrupt
|
|
* INTR_IDLE if no interrupt
|
|
* INTR_NEXT_COMMAND if we have finished processing the command
|
|
*/
|
|
static
|
|
intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
|
|
{
|
|
unsigned int asr, ssr;
|
|
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
if (!(asr & ASR_INT))
|
|
return INTR_IDLE;
|
|
|
|
ssr = sbic_arm_read(host, SBIC_SSR);
|
|
|
|
#if (DEBUG & DEBUG_PHASES)
|
|
print_sbic_status(asr, ssr, host->scsi.phase);
|
|
#endif
|
|
|
|
ADD_STATUS(8, ssr, host->scsi.phase, in_irq);
|
|
|
|
if (host->SCpnt && !host->scsi.disconnectable)
|
|
ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
|
|
|
|
switch (ssr) {
|
|
case 0x00: /* reset state - not advanced */
|
|
printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n",
|
|
host->host->host_no);
|
|
/* setup sbic - WD33C93A */
|
|
sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id);
|
|
sbic_arm_write(host, SBIC_CMND, CMND_RESET);
|
|
return INTR_IDLE;
|
|
|
|
case 0x01: /* reset state - advanced */
|
|
sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
|
|
sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
|
|
sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
|
|
sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
return INTR_IDLE;
|
|
|
|
case 0x41: /* unexpected disconnect aborted command */
|
|
acornscsi_disconnect_unexpected(host);
|
|
return INTR_NEXT_COMMAND;
|
|
}
|
|
|
|
switch (host->scsi.phase) {
|
|
case PHASE_CONNECTING: /* STATE: command removed from issue queue */
|
|
switch (ssr) {
|
|
case 0x11: /* -> PHASE_CONNECTED */
|
|
/* BUS FREE -> SELECTION */
|
|
host->scsi.phase = PHASE_CONNECTED;
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
host->dma.transferred = host->scsi.SCp.scsi_xferred;
|
|
/* 33C93 gives next interrupt indicating bus phase */
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
if (!(asr & ASR_INT))
|
|
break;
|
|
ssr = sbic_arm_read(host, SBIC_SSR);
|
|
ADD_STATUS(8, ssr, host->scsi.phase, 1);
|
|
ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1);
|
|
goto connected;
|
|
|
|
case 0x42: /* select timed out */
|
|
/* -> PHASE_IDLE */
|
|
acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT);
|
|
return INTR_NEXT_COMMAND;
|
|
|
|
case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */
|
|
/* BUS FREE -> RESELECTION */
|
|
host->origSCpnt = host->SCpnt;
|
|
host->SCpnt = NULL;
|
|
msgqueue_flush(&host->scsi.msgs);
|
|
acornscsi_reconnect(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
connected:
|
|
case PHASE_CONNECTED: /* STATE: device selected ok */
|
|
switch (ssr) {
|
|
#ifdef NONSTANDARD
|
|
case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
|
|
/* SELECTION -> COMMAND */
|
|
acornscsi_sendcommand(host);
|
|
break;
|
|
|
|
case 0x8b: /* -> PHASE_STATUS */
|
|
/* SELECTION -> STATUS */
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
#endif
|
|
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* SELECTION ->MESSAGE OUT */
|
|
host->scsi.phase = PHASE_MSGOUT;
|
|
acornscsi_buildmessages(host);
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
/* these should not happen */
|
|
case 0x85: /* target disconnected */
|
|
acornscsi_done(host, &host->SCpnt, DID_ERROR);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */
|
|
/*
|
|
* SCSI standard says that MESSAGE OUT phases can be followed by a
|
|
* DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase
|
|
*/
|
|
switch (ssr) {
|
|
case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
|
|
case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
|
|
/* MESSAGE OUT -> COMMAND */
|
|
acornscsi_sendcommand(host);
|
|
break;
|
|
|
|
case 0x8b: /* -> PHASE_STATUS */
|
|
case 0x1b: /* -> PHASE_STATUS */
|
|
/* MESSAGE OUT -> STATUS */
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
/* MESSAGE OUT -> MESSAGE IN */
|
|
acornscsi_message(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_COMMAND: /* STATE: connected & command sent */
|
|
switch (ssr) {
|
|
case 0x18: /* -> PHASE_DATAOUT */
|
|
/* COMMAND -> DATA OUT */
|
|
if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
acornscsi_dma_setup(host, DMA_OUT);
|
|
if (!acornscsi_starttransfer(host))
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
host->scsi.phase = PHASE_DATAOUT;
|
|
return INTR_IDLE;
|
|
|
|
case 0x19: /* -> PHASE_DATAIN */
|
|
/* COMMAND -> DATA IN */
|
|
if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
acornscsi_dma_setup(host, DMA_IN);
|
|
if (!acornscsi_starttransfer(host))
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
host->scsi.phase = PHASE_DATAIN;
|
|
return INTR_IDLE;
|
|
|
|
case 0x1b: /* -> PHASE_STATUS */
|
|
/* COMMAND -> STATUS */
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
|
|
case 0x1e: /* -> PHASE_MSGOUT */
|
|
/* COMMAND -> MESSAGE OUT */
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
/* COMMAND -> MESSAGE IN */
|
|
acornscsi_message(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */
|
|
if (ssr == 0x85) { /* -> PHASE_IDLE */
|
|
host->scsi.disconnectable = 1;
|
|
host->scsi.reconnected.tag = 0;
|
|
host->scsi.phase = PHASE_IDLE;
|
|
host->stats.disconnects += 1;
|
|
} else {
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_NEXT_COMMAND;
|
|
|
|
case PHASE_IDLE: /* STATE: disconnected */
|
|
if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */
|
|
acornscsi_reconnect(host);
|
|
else {
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */
|
|
/*
|
|
* Command reconnected - if MESGIN, get message - it may be
|
|
* the tag. If not, get command out of disconnected queue
|
|
*/
|
|
/*
|
|
* If we reconnected and we're not in MESSAGE IN phase after IDENTIFY,
|
|
* reconnect I_T_L command
|
|
*/
|
|
if (ssr != 0x8f && !acornscsi_reconnect_finish(host))
|
|
return INTR_IDLE;
|
|
ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
|
|
switch (ssr) {
|
|
case 0x88: /* data out phase */
|
|
/* -> PHASE_DATAOUT */
|
|
/* MESSAGE IN -> DATA OUT */
|
|
acornscsi_dma_setup(host, DMA_OUT);
|
|
if (!acornscsi_starttransfer(host))
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
host->scsi.phase = PHASE_DATAOUT;
|
|
return INTR_IDLE;
|
|
|
|
case 0x89: /* data in phase */
|
|
/* -> PHASE_DATAIN */
|
|
/* MESSAGE IN -> DATA IN */
|
|
acornscsi_dma_setup(host, DMA_IN);
|
|
if (!acornscsi_starttransfer(host))
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
host->scsi.phase = PHASE_DATAIN;
|
|
return INTR_IDLE;
|
|
|
|
case 0x8a: /* command out */
|
|
/* MESSAGE IN -> COMMAND */
|
|
acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
|
|
break;
|
|
|
|
case 0x8b: /* status in */
|
|
/* -> PHASE_STATUSIN */
|
|
/* MESSAGE IN -> STATUS */
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
|
|
case 0x8e: /* message out */
|
|
/* -> PHASE_MSGOUT */
|
|
/* MESSAGE IN -> MESSAGE OUT */
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x8f: /* message in */
|
|
acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_DATAIN: /* STATE: transferred data in */
|
|
/*
|
|
* This is simple - if we disconnect then the DMA address & count is
|
|
* correct.
|
|
*/
|
|
switch (ssr) {
|
|
case 0x19: /* -> PHASE_DATAIN */
|
|
case 0x89: /* -> PHASE_DATAIN */
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
return INTR_IDLE;
|
|
|
|
case 0x1b: /* -> PHASE_STATUSIN */
|
|
case 0x4b: /* -> PHASE_STATUSIN */
|
|
case 0x8b: /* -> PHASE_STATUSIN */
|
|
/* DATA IN -> STATUS */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
|
|
case 0x1e: /* -> PHASE_MSGOUT */
|
|
case 0x4e: /* -> PHASE_MSGOUT */
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* DATA IN -> MESSAGE OUT */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x1f: /* message in */
|
|
case 0x4f: /* message in */
|
|
case 0x8f: /* message in */
|
|
/* DATA IN -> MESSAGE IN */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_DATAOUT: /* STATE: transferred data out */
|
|
/*
|
|
* This is more complicated - if we disconnect, the DMA could be 12
|
|
* bytes ahead of us. We need to correct this.
|
|
*/
|
|
switch (ssr) {
|
|
case 0x18: /* -> PHASE_DATAOUT */
|
|
case 0x88: /* -> PHASE_DATAOUT */
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
return INTR_IDLE;
|
|
|
|
case 0x1b: /* -> PHASE_STATUSIN */
|
|
case 0x4b: /* -> PHASE_STATUSIN */
|
|
case 0x8b: /* -> PHASE_STATUSIN */
|
|
/* DATA OUT -> STATUS */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_dma_adjust(host);
|
|
acornscsi_readstatusbyte(host);
|
|
host->scsi.phase = PHASE_STATUSIN;
|
|
break;
|
|
|
|
case 0x1e: /* -> PHASE_MSGOUT */
|
|
case 0x4e: /* -> PHASE_MSGOUT */
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* DATA OUT -> MESSAGE OUT */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_dma_adjust(host);
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x1f: /* message in */
|
|
case 0x4f: /* message in */
|
|
case 0x8f: /* message in */
|
|
/* DATA OUT -> MESSAGE IN */
|
|
host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
|
|
acornscsi_sbic_xfcount(host);
|
|
acornscsi_dma_stop(host);
|
|
acornscsi_dma_adjust(host);
|
|
acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_STATUSIN: /* STATE: status in complete */
|
|
switch (ssr) {
|
|
case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
|
|
case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
|
|
/* STATUS -> MESSAGE IN */
|
|
acornscsi_message(host);
|
|
break;
|
|
|
|
case 0x1e: /* -> PHASE_MSGOUT */
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* STATUS -> MESSAGE OUT */
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_MSGIN: /* STATE: message in */
|
|
switch (ssr) {
|
|
case 0x1e: /* -> PHASE_MSGOUT */
|
|
case 0x4e: /* -> PHASE_MSGOUT */
|
|
case 0x8e: /* -> PHASE_MSGOUT */
|
|
/* MESSAGE IN -> MESSAGE OUT */
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
|
|
case 0x2f:
|
|
case 0x4f:
|
|
case 0x8f:
|
|
acornscsi_message(host);
|
|
break;
|
|
|
|
case 0x85:
|
|
printk("scsi%d.%c: strange message in disconnection\n",
|
|
host->host->host_no, acornscsi_target(host));
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
acornscsi_done(host, &host->SCpnt, DID_ERROR);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_DONE: /* STATE: received status & message */
|
|
switch (ssr) {
|
|
case 0x85: /* -> PHASE_IDLE */
|
|
acornscsi_done(host, &host->SCpnt, DID_OK);
|
|
return INTR_NEXT_COMMAND;
|
|
|
|
case 0x1e:
|
|
case 0x8e:
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
case PHASE_ABORTED:
|
|
switch (ssr) {
|
|
case 0x85:
|
|
if (host->SCpnt)
|
|
acornscsi_done(host, &host->SCpnt, DID_ABORT);
|
|
else {
|
|
clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun,
|
|
host->busyluns);
|
|
host->scsi.phase = PHASE_IDLE;
|
|
}
|
|
return INTR_NEXT_COMMAND;
|
|
|
|
case 0x1e:
|
|
case 0x2e:
|
|
case 0x4e:
|
|
case 0x8e:
|
|
acornscsi_sendmessage(host);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n",
|
|
host->host->host_no, acornscsi_target(host), ssr);
|
|
acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
|
|
}
|
|
return INTR_PROCESSING;
|
|
}
|
|
|
|
/*
|
|
* Prototype: void acornscsi_intr(int irq, void *dev_id)
|
|
* Purpose : handle interrupts from Acorn SCSI card
|
|
* Params : irq - interrupt number
|
|
* dev_id - device specific data (AS_Host structure)
|
|
*/
|
|
static irqreturn_t
|
|
acornscsi_intr(int irq, void *dev_id)
|
|
{
|
|
AS_Host *host = (AS_Host *)dev_id;
|
|
intr_ret_t ret;
|
|
int iostatus;
|
|
int in_irq = 0;
|
|
|
|
do {
|
|
ret = INTR_IDLE;
|
|
|
|
iostatus = readb(host->fast + INT_REG);
|
|
|
|
if (iostatus & 2) {
|
|
acornscsi_dma_intr(host);
|
|
iostatus = readb(host->fast + INT_REG);
|
|
}
|
|
|
|
if (iostatus & 8)
|
|
ret = acornscsi_sbicintr(host, in_irq);
|
|
|
|
/*
|
|
* If we have a transfer pending, start it.
|
|
* Only start it if the interface has already started transferring
|
|
* it's data
|
|
*/
|
|
if (host->dma.xfer_required)
|
|
acornscsi_dma_xfer(host);
|
|
|
|
if (ret == INTR_NEXT_COMMAND)
|
|
ret = acornscsi_kick(host);
|
|
|
|
in_irq = 1;
|
|
} while (ret != INTR_IDLE);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*=============================================================================================
|
|
* Interfaces between interrupt handler and rest of scsi code
|
|
*/
|
|
|
|
/*
|
|
* Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
|
|
* Purpose : queues a SCSI command
|
|
* Params : cmd - SCSI command
|
|
* done - function called on completion, with pointer to command descriptor
|
|
* Returns : 0, or < 0 on error.
|
|
*/
|
|
static int acornscsi_queuecmd_lck(struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
|
|
|
|
if (!done) {
|
|
/* there should be some way of rejecting errors like this without panicing... */
|
|
panic("scsi%d: queuecommand called with NULL done function [cmd=%p]",
|
|
host->host->host_no, SCpnt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
#if (DEBUG & DEBUG_NO_WRITE)
|
|
if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) {
|
|
printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n",
|
|
host->host->host_no, '0' + SCpnt->device->id);
|
|
SCpnt->result = DID_NO_CONNECT << 16;
|
|
done(SCpnt);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
SCpnt->scsi_done = done;
|
|
SCpnt->host_scribble = NULL;
|
|
SCpnt->result = 0;
|
|
SCpnt->tag = 0;
|
|
SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]);
|
|
SCpnt->SCp.sent_command = 0;
|
|
SCpnt->SCp.scsi_xferred = 0;
|
|
|
|
init_SCp(SCpnt);
|
|
|
|
host->stats.queues += 1;
|
|
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) {
|
|
SCpnt->result = DID_ERROR << 16;
|
|
done(SCpnt);
|
|
return 0;
|
|
}
|
|
local_irq_save(flags);
|
|
if (host->scsi.phase == PHASE_IDLE)
|
|
acornscsi_kick(host);
|
|
local_irq_restore(flags);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
DEF_SCSI_QCMD(acornscsi_queuecmd)
|
|
|
|
/*
|
|
* Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result)
|
|
* Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2
|
|
* Params : SCpntp1 - pointer to command to return
|
|
* SCpntp2 - pointer to command to check
|
|
* result - result to pass back to mid-level done function
|
|
* Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2.
|
|
*/
|
|
static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1,
|
|
struct scsi_cmnd **SCpntp2,
|
|
int result)
|
|
{
|
|
struct scsi_cmnd *SCpnt = *SCpntp1;
|
|
|
|
if (SCpnt) {
|
|
*SCpntp1 = NULL;
|
|
|
|
SCpnt->result = result;
|
|
SCpnt->scsi_done(SCpnt);
|
|
}
|
|
|
|
if (SCpnt == *SCpntp2)
|
|
*SCpntp2 = NULL;
|
|
}
|
|
|
|
enum res_abort { res_not_running, res_success, res_success_clear, res_snooze };
|
|
|
|
/*
|
|
* Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt)
|
|
* Purpose : abort a command on this host
|
|
* Params : SCpnt - command to abort
|
|
* Returns : our abort status
|
|
*/
|
|
static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt)
|
|
{
|
|
enum res_abort res = res_not_running;
|
|
|
|
if (queue_remove_cmd(&host->queues.issue, SCpnt)) {
|
|
/*
|
|
* The command was on the issue queue, and has not been
|
|
* issued yet. We can remove the command from the queue,
|
|
* and acknowledge the abort. Neither the devices nor the
|
|
* interface know about the command.
|
|
*/
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("on issue queue ");
|
|
//#endif
|
|
res = res_success;
|
|
} else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) {
|
|
/*
|
|
* The command was on the disconnected queue. Simply
|
|
* acknowledge the abort condition, and when the target
|
|
* reconnects, we will give it an ABORT message. The
|
|
* target should then disconnect, and we will clear
|
|
* the busylun bit.
|
|
*/
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("on disconnected queue ");
|
|
//#endif
|
|
res = res_success;
|
|
} else if (host->SCpnt == SCpnt) {
|
|
unsigned long flags;
|
|
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("executing ");
|
|
//#endif
|
|
|
|
local_irq_save(flags);
|
|
switch (host->scsi.phase) {
|
|
/*
|
|
* If the interface is idle, and the command is 'disconnectable',
|
|
* then it is the same as on the disconnected queue. We simply
|
|
* remove all traces of the command. When the target reconnects,
|
|
* we will give it an ABORT message since the command could not
|
|
* be found. When the target finally disconnects, we will clear
|
|
* the busylun bit.
|
|
*/
|
|
case PHASE_IDLE:
|
|
if (host->scsi.disconnectable) {
|
|
host->scsi.disconnectable = 0;
|
|
host->SCpnt = NULL;
|
|
res = res_success;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* If the command has connected and done nothing further,
|
|
* simply force a disconnect. We also need to clear the
|
|
* busylun bit.
|
|
*/
|
|
case PHASE_CONNECTED:
|
|
sbic_arm_write(host, SBIC_CMND, CMND_DISCONNECT);
|
|
host->SCpnt = NULL;
|
|
res = res_success_clear;
|
|
break;
|
|
|
|
default:
|
|
acornscsi_abortcmd(host, host->SCpnt->tag);
|
|
res = res_snooze;
|
|
}
|
|
local_irq_restore(flags);
|
|
} else if (host->origSCpnt == SCpnt) {
|
|
/*
|
|
* The command will be executed next, but a command
|
|
* is currently using the interface. This is similar to
|
|
* being on the issue queue, except the busylun bit has
|
|
* been set.
|
|
*/
|
|
host->origSCpnt = NULL;
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("waiting for execution ");
|
|
//#endif
|
|
res = res_success_clear;
|
|
} else
|
|
printk("unknown ");
|
|
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt)
|
|
* Purpose : abort a command on this host
|
|
* Params : SCpnt - command to abort
|
|
* Returns : one of SCSI_ABORT_ macros
|
|
*/
|
|
int acornscsi_abort(struct scsi_cmnd *SCpnt)
|
|
{
|
|
AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata;
|
|
int result;
|
|
|
|
host->stats.aborts += 1;
|
|
|
|
#if (DEBUG & DEBUG_ABORT)
|
|
{
|
|
int asr, ssr;
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
ssr = sbic_arm_read(host, SBIC_SSR);
|
|
|
|
printk(KERN_WARNING "acornscsi_abort: ");
|
|
print_sbic_status(asr, ssr, host->scsi.phase);
|
|
acornscsi_dumplog(host, SCpnt->device->id);
|
|
}
|
|
#endif
|
|
|
|
printk("scsi%d: ", host->host->host_no);
|
|
|
|
switch (acornscsi_do_abort(host, SCpnt)) {
|
|
/*
|
|
* We managed to find the command and cleared it out.
|
|
* We do not expect the command to be executing on the
|
|
* target, but we have set the busylun bit.
|
|
*/
|
|
case res_success_clear:
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("clear ");
|
|
//#endif
|
|
clear_bit(SCpnt->device->id * 8 +
|
|
(u8)(SCpnt->device->lun & 0x7), host->busyluns);
|
|
|
|
/*
|
|
* We found the command, and cleared it out. Either
|
|
* the command is still known to be executing on the
|
|
* target, or the busylun bit is not set.
|
|
*/
|
|
case res_success:
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("success\n");
|
|
//#endif
|
|
result = SUCCESS;
|
|
break;
|
|
|
|
/*
|
|
* We did find the command, but unfortunately we couldn't
|
|
* unhook it from ourselves. Wait some more, and if it
|
|
* still doesn't complete, reset the interface.
|
|
*/
|
|
case res_snooze:
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("snooze\n");
|
|
//#endif
|
|
result = FAILED;
|
|
break;
|
|
|
|
/*
|
|
* The command could not be found (either because it completed,
|
|
* or it got dropped.
|
|
*/
|
|
default:
|
|
case res_not_running:
|
|
acornscsi_dumplog(host, SCpnt->device->id);
|
|
result = FAILED;
|
|
//#if (DEBUG & DEBUG_ABORT)
|
|
printk("not running\n");
|
|
//#endif
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt)
|
|
* Purpose : reset a command on this host/reset this host
|
|
* Params : SCpnt - command causing reset
|
|
* Returns : one of SCSI_RESET_ macros
|
|
*/
|
|
int acornscsi_host_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
|
|
struct scsi_cmnd *SCptr;
|
|
|
|
host->stats.resets += 1;
|
|
|
|
#if (DEBUG & DEBUG_RESET)
|
|
{
|
|
int asr, ssr, devidx;
|
|
|
|
asr = sbic_arm_read(host, SBIC_ASR);
|
|
ssr = sbic_arm_read(host, SBIC_SSR);
|
|
|
|
printk(KERN_WARNING "acornscsi_reset: ");
|
|
print_sbic_status(asr, ssr, host->scsi.phase);
|
|
for (devidx = 0; devidx < 9; devidx++)
|
|
acornscsi_dumplog(host, devidx);
|
|
}
|
|
#endif
|
|
|
|
acornscsi_dma_stop(host);
|
|
|
|
/*
|
|
* do hard reset. This resets all devices on this host, and so we
|
|
* must set the reset status on all commands.
|
|
*/
|
|
acornscsi_resetcard(host);
|
|
|
|
while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL)
|
|
;
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/*==============================================================================================
|
|
* initialisation & miscellaneous support
|
|
*/
|
|
|
|
/*
|
|
* Function: char *acornscsi_info(struct Scsi_Host *host)
|
|
* Purpose : return a string describing this interface
|
|
* Params : host - host to give information on
|
|
* Returns : a constant string
|
|
*/
|
|
const
|
|
char *acornscsi_info(struct Scsi_Host *host)
|
|
{
|
|
static char string[100], *p;
|
|
|
|
p = string;
|
|
|
|
p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d"
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
|
|
" SYNC"
|
|
#endif
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
" TAG"
|
|
#endif
|
|
#if (DEBUG & DEBUG_NO_WRITE)
|
|
" NOWRITE (" __stringify(NO_WRITE) ")"
|
|
#endif
|
|
, host->hostt->name, host->io_port, host->irq,
|
|
VER_MAJOR, VER_MINOR, VER_PATCH);
|
|
return string;
|
|
}
|
|
|
|
static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance)
|
|
{
|
|
int devidx;
|
|
struct scsi_device *scd;
|
|
AS_Host *host;
|
|
|
|
host = (AS_Host *)instance->hostdata;
|
|
|
|
seq_printf(m, "AcornSCSI driver v%d.%d.%d"
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
|
|
" SYNC"
|
|
#endif
|
|
#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
|
|
" TAG"
|
|
#endif
|
|
#if (DEBUG & DEBUG_NO_WRITE)
|
|
" NOWRITE (" __stringify(NO_WRITE) ")"
|
|
#endif
|
|
"\n\n", VER_MAJOR, VER_MINOR, VER_PATCH);
|
|
|
|
seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n",
|
|
host->base + SBIC_REGIDX, host->scsi.irq);
|
|
#ifdef USE_DMAC
|
|
seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n",
|
|
host->base + DMAC_OFFSET, host->scsi.irq);
|
|
#endif
|
|
|
|
seq_printf(m, "Statistics:\n"
|
|
"Queued commands: %-10u Issued commands: %-10u\n"
|
|
"Done commands : %-10u Reads : %-10u\n"
|
|
"Writes : %-10u Others : %-10u\n"
|
|
"Disconnects : %-10u Aborts : %-10u\n"
|
|
"Resets : %-10u\n\nLast phases:",
|
|
host->stats.queues, host->stats.removes,
|
|
host->stats.fins, host->stats.reads,
|
|
host->stats.writes, host->stats.miscs,
|
|
host->stats.disconnects, host->stats.aborts,
|
|
host->stats.resets);
|
|
|
|
for (devidx = 0; devidx < 9; devidx ++) {
|
|
unsigned int statptr, prev;
|
|
|
|
seq_printf(m, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx));
|
|
statptr = host->status_ptr[devidx] - 10;
|
|
|
|
if ((signed int)statptr < 0)
|
|
statptr += STATUS_BUFFER_SIZE;
|
|
|
|
prev = host->status[devidx][statptr].when;
|
|
|
|
for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
|
|
if (host->status[devidx][statptr].when) {
|
|
seq_printf(m, "%c%02X:%02X+%2ld",
|
|
host->status[devidx][statptr].irq ? '-' : ' ',
|
|
host->status[devidx][statptr].ph,
|
|
host->status[devidx][statptr].ssr,
|
|
(host->status[devidx][statptr].when - prev) < 100 ?
|
|
(host->status[devidx][statptr].when - prev) : 99);
|
|
prev = host->status[devidx][statptr].when;
|
|
}
|
|
}
|
|
}
|
|
|
|
seq_printf(m, "\nAttached devices:\n");
|
|
|
|
shost_for_each_device(scd, instance) {
|
|
seq_printf(m, "Device/Lun TaggedQ Sync\n");
|
|
seq_printf(m, " %d/%llu ", scd->id, scd->lun);
|
|
if (scd->tagged_supported)
|
|
seq_printf(m, "%3sabled(%3d) ",
|
|
scd->simple_tags ? "en" : "dis",
|
|
scd->current_tag);
|
|
else
|
|
seq_printf(m, "unsupported ");
|
|
|
|
if (host->device[scd->id].sync_xfer & 15)
|
|
seq_printf(m, "offset %d, %d ns\n",
|
|
host->device[scd->id].sync_xfer & 15,
|
|
acornscsi_getperiod(host->device[scd->id].sync_xfer));
|
|
else
|
|
seq_printf(m, "async\n");
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct scsi_host_template acornscsi_template = {
|
|
.module = THIS_MODULE,
|
|
.show_info = acornscsi_show_info,
|
|
.name = "AcornSCSI",
|
|
.info = acornscsi_info,
|
|
.queuecommand = acornscsi_queuecmd,
|
|
.eh_abort_handler = acornscsi_abort,
|
|
.eh_host_reset_handler = acornscsi_host_reset,
|
|
.can_queue = 16,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = 2,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
.proc_name = "acornscsi",
|
|
};
|
|
|
|
static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
|
|
{
|
|
struct Scsi_Host *host;
|
|
AS_Host *ashost;
|
|
int ret;
|
|
|
|
ret = ecard_request_resources(ec);
|
|
if (ret)
|
|
goto out;
|
|
|
|
host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host));
|
|
if (!host) {
|
|
ret = -ENOMEM;
|
|
goto out_release;
|
|
}
|
|
|
|
ashost = (AS_Host *)host->hostdata;
|
|
|
|
ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
|
|
ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
|
|
if (!ashost->base || !ashost->fast)
|
|
goto out_put;
|
|
|
|
host->irq = ec->irq;
|
|
ashost->host = host;
|
|
ashost->scsi.irq = host->irq;
|
|
|
|
ec->irqaddr = ashost->fast + INT_REG;
|
|
ec->irqmask = 0x0a;
|
|
|
|
ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost);
|
|
if (ret) {
|
|
printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n",
|
|
host->host_no, ashost->scsi.irq, ret);
|
|
goto out_put;
|
|
}
|
|
|
|
memset(&ashost->stats, 0, sizeof (ashost->stats));
|
|
queue_initialise(&ashost->queues.issue);
|
|
queue_initialise(&ashost->queues.disconnected);
|
|
msgqueue_initialise(&ashost->scsi.msgs);
|
|
|
|
acornscsi_resetcard(ashost);
|
|
|
|
ret = scsi_add_host(host, &ec->dev);
|
|
if (ret)
|
|
goto out_irq;
|
|
|
|
scsi_scan_host(host);
|
|
goto out;
|
|
|
|
out_irq:
|
|
free_irq(host->irq, ashost);
|
|
msgqueue_free(&ashost->scsi.msgs);
|
|
queue_free(&ashost->queues.disconnected);
|
|
queue_free(&ashost->queues.issue);
|
|
out_put:
|
|
ecardm_iounmap(ec, ashost->fast);
|
|
ecardm_iounmap(ec, ashost->base);
|
|
scsi_host_put(host);
|
|
out_release:
|
|
ecard_release_resources(ec);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void acornscsi_remove(struct expansion_card *ec)
|
|
{
|
|
struct Scsi_Host *host = ecard_get_drvdata(ec);
|
|
AS_Host *ashost = (AS_Host *)host->hostdata;
|
|
|
|
ecard_set_drvdata(ec, NULL);
|
|
scsi_remove_host(host);
|
|
|
|
/*
|
|
* Put card into RESET state
|
|
*/
|
|
writeb(0x80, ashost->fast + PAGE_REG);
|
|
|
|
free_irq(host->irq, ashost);
|
|
|
|
msgqueue_free(&ashost->scsi.msgs);
|
|
queue_free(&ashost->queues.disconnected);
|
|
queue_free(&ashost->queues.issue);
|
|
ecardm_iounmap(ec, ashost->fast);
|
|
ecardm_iounmap(ec, ashost->base);
|
|
scsi_host_put(host);
|
|
ecard_release_resources(ec);
|
|
}
|
|
|
|
static const struct ecard_id acornscsi_cids[] = {
|
|
{ MANU_ACORN, PROD_ACORN_SCSI },
|
|
{ 0xffff, 0xffff },
|
|
};
|
|
|
|
static struct ecard_driver acornscsi_driver = {
|
|
.probe = acornscsi_probe,
|
|
.remove = acornscsi_remove,
|
|
.id_table = acornscsi_cids,
|
|
.drv = {
|
|
.name = "acornscsi",
|
|
},
|
|
};
|
|
|
|
static int __init acornscsi_init(void)
|
|
{
|
|
return ecard_register_driver(&acornscsi_driver);
|
|
}
|
|
|
|
static void __exit acornscsi_exit(void)
|
|
{
|
|
ecard_remove_driver(&acornscsi_driver);
|
|
}
|
|
|
|
module_init(acornscsi_init);
|
|
module_exit(acornscsi_exit);
|
|
|
|
MODULE_AUTHOR("Russell King");
|
|
MODULE_DESCRIPTION("AcornSCSI driver");
|
|
MODULE_LICENSE("GPL");
|