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Commit 1806b777 authored by Aristeu Sergio Rozanski Filho's avatar Aristeu Sergio Rozanski Filho Committed by James Bottomley
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[PATCH] qlogicfas: split and create a new module

parent ba08cd44
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Showing with 717 additions and 604 deletions
drivers/scsi/Makefile
View file @ 1806b777
......@@ -75,7 +75,8 @@ obj-$(CONFIG_SCSI_NCR53C406A) += NCR53c406a.o
obj-$(CONFIG_SCSI_NCR_D700) += 53c700.o NCR_D700.o
obj-$(CONFIG_SCSI_NCR_Q720) += NCR_Q720_mod.o
obj-$(CONFIG_SCSI_SYM53C416) += sym53c416.o
obj-$(CONFIG_SCSI_QLOGIC_FAS) += qlogicfas.o
obj-$(CONFIG_SCSI_QLOGIC_FAS) += qlogicfas408.o qlogicfas.o
obj-$(CONFIG_PCMCIA_QLOGIC) += qlogicfas408.o
obj-$(CONFIG_SCSI_QLOGIC_ISP) += qlogicisp.o
obj-$(CONFIG_SCSI_QLOGIC_FC) += qlogicfc.o
obj-$(CONFIG_SCSI_QLOGIC_1280) += qla1280.o
......
drivers/scsi/qlogicfas.c
View file @ 1806b777
/*----------------------------------------------------------------*/
/*
Qlogic linux driver - work in progress. No Warranty express or implied.
Use at your own risk. Support Tort Reform so you won't have to read all
these silly disclaimers.
Copyright 1994, Tom Zerucha.
tz@execpc.com
Additional Code, and much appreciated help by
Michael A. Griffith
grif@cs.ucr.edu
Thanks to Eric Youngdale and Dave Hinds for loadable module and PCMCIA
help respectively, and for suffering through my foolishness during the
debugging process.
Reference Qlogic FAS408 Technical Manual, 53408-510-00A, May 10, 1994
(you can reference it, but it is incomplete and inaccurate in places)
Version 0.46 1/30/97 - kernel 1.2.0+
Functions as standalone, loadable, and PCMCIA driver, the latter from
Dave Hinds' PCMCIA package.
Cleaned up 26/10/2002 by Alan Cox <alan@redhat.com> as part of the 2.5
SCSI driver cleanup and audit. This driver still needs work on the
following
- Non terminating hardware waits
- Some layering violations with its pcmcia stub
Redistributable under terms of the GNU General Public License
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.
*/
* Qlogic FAS408 ISA card driver
*
* Copyright 1994, Tom Zerucha.
* tz@execpc.com
*
* Redistributable under terms of the GNU General Public License
*
* 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.
*
* Check qlogicfas408.c for more credits and info.
*/
#include <linux/module.h>
#include <linux/blkdev.h> /* to get disk capacity */
......@@ -57,428 +33,28 @@
#include "scsi.h"
#include "hosts.h"
#include "qlogicfas.h"
/*----------------------------------------------------------------*/
int qlcfg5 = (XTALFREQ << 5); /* 15625/512 */
int qlcfg6 = SYNCXFRPD;
int qlcfg7 = SYNCOFFST;
int qlcfg8 = (SLOWCABLE << 7) | (QL_ENABLE_PARITY << 4);
int qlcfg9 = ((XTALFREQ + 4) / 5);
int qlcfgc = (FASTCLK << 3) | (FASTSCSI << 4);
static char qlogicfas_name[] = "qlogicfas";
int qlogicfas_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *));
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* local functions */
/*----------------------------------------------------------------*/
/* error recovery - reset everything */
static void ql_zap(qlogicfas_priv_t priv)
{
int x;
int qbase = priv->qbase;
x = inb(qbase + 0xd);
REG0;
outb(3, qbase + 3); /* reset SCSI */
outb(2, qbase + 3); /* reset chip */
if (x & 0x80)
REG1;
}
/*
* Do a pseudo-dma tranfer
*/
static int ql_pdma(qlogicfas_priv_t priv, int phase, char *request, int reqlen)
{
int j;
int qbase = priv->qbase;
j = 0;
if (phase & 1) { /* in */
#if QL_TURBO_PDMA
rtrc(4)
/* empty fifo in large chunks */
if (reqlen >= 128 && (inb(qbase + 8) & 2)) { /* full */
insl(qbase + 4, request, 32);
reqlen -= 128;
request += 128;
}
while (reqlen >= 84 && !(j & 0xc0)) /* 2/3 */
if ((j = inb(qbase + 8)) & 4)
{
insl(qbase + 4, request, 21);
reqlen -= 84;
request += 84;
}
if (reqlen >= 44 && (inb(qbase + 8) & 8)) { /* 1/3 */
insl(qbase + 4, request, 11);
reqlen -= 44;
request += 44;
}
#endif
/* until both empty and int (or until reclen is 0) */
rtrc(7)
j = 0;
while (reqlen && !((j & 0x10) && (j & 0xc0)))
{
/* while bytes to receive and not empty */
j &= 0xc0;
while (reqlen && !((j = inb(qbase + 8)) & 0x10))
{
*request++ = inb(qbase + 4);
reqlen--;
}
if (j & 0x10)
j = inb(qbase + 8);
}
} else { /* out */
#if QL_TURBO_PDMA
rtrc(4)
if (reqlen >= 128 && inb(qbase + 8) & 0x10) { /* empty */
outsl(qbase + 4, request, 32);
reqlen -= 128;
request += 128;
}
while (reqlen >= 84 && !(j & 0xc0)) /* 1/3 */
if (!((j = inb(qbase + 8)) & 8)) {
outsl(qbase + 4, request, 21);
reqlen -= 84;
request += 84;
}
if (reqlen >= 40 && !(inb(qbase + 8) & 4)) { /* 2/3 */
outsl(qbase + 4, request, 10);
reqlen -= 40;
request += 40;
}
#endif
/* until full and int (or until reclen is 0) */
rtrc(7)
j = 0;
while (reqlen && !((j & 2) && (j & 0xc0))) {
/* while bytes to send and not full */
while (reqlen && !((j = inb(qbase + 8)) & 2))
{
outb(*request++, qbase + 4);
reqlen--;
}
if (j & 2)
j = inb(qbase + 8);
}
}
/* maybe return reqlen */
return inb(qbase + 8) & 0xc0;
}
/*
* Wait for interrupt flag (polled - not real hardware interrupt)
*/
static int ql_wai(qlogicfas_priv_t priv)
{
int k;
int qbase = priv->qbase;
unsigned long i;
k = 0;
i = jiffies + WATCHDOG;
while (time_before(jiffies, i) && !priv->qabort &&
!((k = inb(qbase + 4)) & 0xe0)) {
barrier();
cpu_relax();
}
if (time_after_eq(jiffies, i))
return (DID_TIME_OUT);
if (priv->qabort)
return (priv->qabort == 1 ? DID_ABORT : DID_RESET);
if (k & 0x60)
ql_zap(priv);
if (k & 0x20)
return (DID_PARITY);
if (k & 0x40)
return (DID_ERROR);
return 0;
}
/*
* Initiate scsi command - queueing handler
* caller must hold host lock
*/
static void ql_icmd(Scsi_Cmnd * cmd)
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(cmd->device->host->hostdata[0]);
int qbase = priv->qbase;
unsigned int i;
priv->qabort = 0;
REG0;
/* clearing of interrupts and the fifo is needed */
inb(qbase + 5); /* clear interrupts */
if (inb(qbase + 5)) /* if still interrupting */
outb(2, qbase + 3); /* reset chip */
else if (inb(qbase + 7) & 0x1f)
outb(1, qbase + 3); /* clear fifo */
while (inb(qbase + 5)); /* clear ints */
REG1;
outb(1, qbase + 8); /* set for PIO pseudo DMA */
outb(0, qbase + 0xb); /* disable ints */
inb(qbase + 8); /* clear int bits */
REG0;
outb(0x40, qbase + 0xb); /* enable features */
/* configurables */
outb(qlcfgc, qbase + 0xc);
/* config: no reset interrupt, (initiator) bus id */
outb(0x40 | qlcfg8 | priv->qinitid, qbase + 8);
outb(qlcfg7, qbase + 7);
outb(qlcfg6, qbase + 6);
/**/ outb(qlcfg5, qbase + 5); /* select timer */
outb(qlcfg9 & 7, qbase + 9); /* prescaler */
/* outb(0x99, qbase + 5); */
outb(cmd->device->id, qbase + 4);
for (i = 0; i < cmd->cmd_len; i++)
outb(cmd->cmnd[i], qbase + 2);
priv->qlcmd = cmd;
outb(0x41, qbase + 3); /* select and send command */
}
/*
* Process scsi command - usually after interrupt
*/
static unsigned int ql_pcmd(Scsi_Cmnd * cmd)
{
unsigned int i, j;
unsigned long k;
unsigned int result; /* ultimate return result */
unsigned int status; /* scsi returned status */
unsigned int message; /* scsi returned message */
unsigned int phase; /* recorded scsi phase */
unsigned int reqlen; /* total length of transfer */
struct scatterlist *sglist; /* scatter-gather list pointer */
unsigned int sgcount; /* sg counter */
char *buf;
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(cmd->device->host->hostdata[0]);
int qbase = priv->qbase;
rtrc(1)
j = inb(qbase + 6);
i = inb(qbase + 5);
if (i == 0x20) {
return (DID_NO_CONNECT << 16);
}
i |= inb(qbase + 5); /* the 0x10 bit can be set after the 0x08 */
if (i != 0x18) {
printk(KERN_ERR "Ql:Bad Interrupt status:%02x\n", i);
ql_zap(priv);
return (DID_BAD_INTR << 16);
}
j &= 7; /* j = inb( qbase + 7 ) >> 5; */
/* correct status is supposed to be step 4 */
/* it sometimes returns step 3 but with 0 bytes left to send */
/* We can try stuffing the FIFO with the max each time, but we will get a
sequence of 3 if any bytes are left (but we do flush the FIFO anyway */
if (j != 3 && j != 4) {
printk(KERN_ERR "Ql:Bad sequence for command %d, int %02X, cmdleft = %d\n",
j, i, inb(qbase + 7) & 0x1f);
ql_zap(priv);
return (DID_ERROR << 16);
}
result = DID_OK;
if (inb(qbase + 7) & 0x1f) /* if some bytes in fifo */
outb(1, qbase + 3); /* clear fifo */
/* note that request_bufflen is the total xfer size when sg is used */
reqlen = cmd->request_bufflen;
/* note that it won't work if transfers > 16M are requested */
if (reqlen && !((phase = inb(qbase + 4)) & 6)) { /* data phase */
rtrc(2)
outb(reqlen, qbase); /* low-mid xfer cnt */
outb(reqlen >> 8, qbase + 1); /* low-mid xfer cnt */
outb(reqlen >> 16, qbase + 0xe); /* high xfer cnt */
outb(0x90, qbase + 3); /* command do xfer */
/* PIO pseudo DMA to buffer or sglist */
REG1;
if (!cmd->use_sg)
ql_pdma(priv, phase, cmd->request_buffer,
cmd->request_bufflen);
else {
sgcount = cmd->use_sg;
sglist = cmd->request_buffer;
while (sgcount--) {
if (priv->qabort) {
REG0;
return ((priv->qabort == 1 ?
DID_ABORT : DID_RESET) << 16);
}
buf = page_address(sglist->page) + sglist->offset;
if (ql_pdma(priv, phase, buf, sglist->length))
break;
sglist++;
}
}
REG0;
rtrc(2)
/*
* Wait for irq (split into second state of irq handler
* if this can take time)
*/
if ((k = ql_wai(priv)))
return (k << 16);
k = inb(qbase + 5); /* should be 0x10, bus service */
}
/*
* Enter Status (and Message In) Phase
*/
k = jiffies + WATCHDOG;
while (time_before(jiffies, k) && !priv->qabort &&
!(inb(qbase + 4) & 6))
cpu_relax(); /* wait for status phase */
if (time_after_eq(jiffies, k)) {
ql_zap(priv);
return (DID_TIME_OUT << 16);
}
/* FIXME: timeout ?? */
while (inb(qbase + 5))
cpu_relax(); /* clear pending ints */
if (priv->qabort)
return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
outb(0x11, qbase + 3); /* get status and message */
if ((k = ql_wai(priv)))
return (k << 16);
i = inb(qbase + 5); /* get chip irq stat */
j = inb(qbase + 7) & 0x1f; /* and bytes rec'd */
status = inb(qbase + 2);
message = inb(qbase + 2);
/*
* Should get function complete int if Status and message, else
* bus serv if only status
*/
if (!((i == 8 && j == 2) || (i == 0x10 && j == 1))) {
printk(KERN_ERR "Ql:Error during status phase, int=%02X, %d bytes recd\n", i, j);
result = DID_ERROR;
}
outb(0x12, qbase + 3); /* done, disconnect */
rtrc(1)
if ((k = ql_wai(priv)))
return (k << 16);
/*
* Should get bus service interrupt and disconnect interrupt
*/
i = inb(qbase + 5); /* should be bus service */
while (!priv->qabort && ((i & 0x20) != 0x20)) {
barrier();
cpu_relax();
i |= inb(qbase + 5);
}
rtrc(0)
if (priv->qabort)
return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
return (result << 16) | (message << 8) | (status & STATUS_MASK);
}
/*
* Interrupt handler
*/
static void ql_ihandl(int irq, void *dev_id, struct pt_regs *regs)
{
Scsi_Cmnd *icmd;
struct Scsi_Host *host = (struct Scsi_Host *)dev_id;
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(host->hostdata[0]);
int qbase = priv->qbase;
REG0;
if (!(inb(qbase + 4) & 0x80)) /* false alarm? */
return;
if (priv->qlcmd == NULL) { /* no command to process? */
int i;
i = 16;
while (i-- && inb(qbase + 5)); /* maybe also ql_zap() */
return;
}
icmd = priv->qlcmd;
icmd->result = ql_pcmd(icmd);
priv->qlcmd = NULL;
/*
* If result is CHECK CONDITION done calls qcommand to request
* sense
*/
(icmd->scsi_done) (icmd);
}
irqreturn_t do_ql_ihandl(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned long flags;
struct Scsi_Host *host = dev_id;
#include "qlogicfas408.h"
spin_lock_irqsave(host->host_lock, flags);
ql_ihandl(irq, dev_id, regs);
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_HANDLED;
}
/*
* Queued command
/* Set the following to 2 to use normal interrupt (active high/totempole-
* tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
* drain
*/
#define INT_TYPE 2
int qlogicfas_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(cmd->device->host->hostdata[0]);
if (cmd->device->id == priv->qinitid) {
cmd->result = DID_BAD_TARGET << 16;
done(cmd);
return 0;
}
cmd->scsi_done = done;
/* wait for the last command's interrupt to finish */
while (priv->qlcmd != NULL) {
barrier();
cpu_relax();
}
ql_icmd(cmd);
return 0;
}
static char qlogicfas_name[] = "qlogicfas";
#ifndef PCMCIA
/*
* Look for qlogic card and init if found
*/
struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host, int qbase,
static struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host,
int qbase,
int qlirq)
{
int qltyp; /* type of chip */
int qinitid;
struct Scsi_Host *hreg; /* registered host structure */
qlogicfas_priv_t priv;
struct qlogicfas408_priv *priv;
/* Qlogic Cards only exist at 0x230 or 0x330 (the chip itself
* decodes the address - I check 230 first since MIDI cards are
......@@ -498,9 +74,7 @@ struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host, int qbase,
goto err;
}
REG1;
if (((inb(qbase + 0xe) ^ inb(qbase + 0xe)) != 7)
|| ((inb(qbase + 0xe) ^ inb(qbase + 0xe)) != 7)) {
if (!qlogicfas408_detect(qbase, INT_TYPE)) {
printk(KERN_WARNING "%s: probe failed for %#x\n",
qlogicfas_name,
qbase);
......@@ -510,29 +84,17 @@ struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host, int qbase,
printk(KERN_INFO "%s: Using preset base address of %03x,"
" IRQ %d\n", qlogicfas_name, qbase, qlirq);
qltyp = inb(qbase + 0xe) & 0xf8;
qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
qinitid = host->this_id;
if (qinitid < 0)
qinitid = 7; /* if no ID, use 7 */
outb(1, qbase + 8); /* set for PIO pseudo DMA */
REG0;
outb(0x40 | qlcfg8 | qinitid, qbase + 8); /* (ini) bus id, disable scsi rst */
outb(qlcfg5, qbase + 5); /* select timer */
outb(qlcfg9, qbase + 9); /* prescaler */
#if QL_RESET_AT_START
outb(3, qbase + 3);
REG1;
/* FIXME: timeout */
while (inb(qbase + 0xf) & 4)
cpu_relax();
REG0;
#endif
hreg = scsi_host_alloc(host, sizeof(struct qlogicfas_priv));
qlogicfas408_setup(qbase, qinitid, INT_TYPE);
hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
if (!hreg)
goto err_release_mem;
priv = (qlogicfas_priv_t)&(hreg->hostdata[0]);
priv = get_priv_by_host(hreg);
hreg->io_port = qbase;
hreg->n_io_port = 16;
hreg->dma_channel = -1;
......@@ -542,13 +104,14 @@ struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host, int qbase,
priv->qlirq = qlirq;
priv->qinitid = qinitid;
priv->shost = hreg;
priv->int_type = INT_TYPE;
sprintf(priv->qinfo,
"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
qltyp, qbase, qlirq, QL_TURBO_PDMA);
host->name = qlogicfas_name;
if (request_irq(qlirq, do_ql_ihandl, 0, qlogicfas_name, hreg))
if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg))
goto free_scsi_host;
if (scsi_add_host(hreg, NULL))
......@@ -571,7 +134,7 @@ struct Scsi_Host *__qlogicfas_detect(Scsi_Host_Template *host, int qbase,
}
#define MAX_QLOGICFAS 8
static qlogicfas_priv_t cards;
static struct qlogicfas408_priv *cards;
static int iobase[MAX_QLOGICFAS];
static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
MODULE_PARM(iobase, "1-" __MODULE_STRING(MAX_QLOGICFAS) "i");
......@@ -579,10 +142,10 @@ MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_QLOGICFAS) "i");
MODULE_PARM_DESC(iobase, "I/O address");
MODULE_PARM_DESC(irq, "IRQ");
int __devinit qlogicfas_detect(Scsi_Host_Template *sht)
static int __devinit qlogicfas_detect(Scsi_Host_Template *sht)
{
struct Scsi_Host *shost;
qlogicfas_priv_t priv;
struct qlogicfas408_priv *priv;
int num;
for (num = 0; num < MAX_QLOGICFAS; num++) {
......@@ -591,7 +154,7 @@ int __devinit qlogicfas_detect(Scsi_Host_Template *sht)
/* no more devices */
break;
}
priv = (qlogicfas_priv_t)&(shost->hostdata[0]);
priv = get_priv_by_host(shost);
priv->next = cards;
cards = priv;
}
......@@ -601,13 +164,10 @@ int __devinit qlogicfas_detect(Scsi_Host_Template *sht)
static int qlogicfas_release(struct Scsi_Host *shost)
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(shost->hostdata[0]);
int qbase = priv->qbase;
struct qlogicfas408_priv *priv = get_priv_by_host(shost);
if (shost->irq) {
REG1;
outb(0, qbase + 0xb); /* disable ints */
qlogicfas408_disable_ints(priv);
free_irq(shost->irq, shost);
}
if (shost->dma_channel != 0xff)
......@@ -619,100 +179,21 @@ static int qlogicfas_release(struct Scsi_Host *shost)
return 0;
}
#endif /* ifndef PCMCIA */
/*
* Return bios parameters
*/
int qlogicfas_biosparam(struct scsi_device * disk,
struct block_device *dev,
sector_t capacity, int ip[])
{
/* This should mimic the DOS Qlogic driver's behavior exactly */
ip[0] = 0x40;
ip[1] = 0x20;
ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
if (ip[2] > 1024) {
ip[0] = 0xff;
ip[1] = 0x3f;
ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
#if 0
if (ip[2] > 1023)
ip[2] = 1023;
#endif
}
return 0;
}
/*
* Abort a command in progress
*/
static int qlogicfas_abort(Scsi_Cmnd * cmd)
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(cmd->device->host->hostdata[0]);
priv->qabort = 1;
ql_zap(priv);
return SUCCESS;
}
/*
* Reset SCSI bus
* FIXME: This function is invoked with cmd = NULL directly by
* the PCMCIA qlogic_stub code. This wants fixing
*/
int qlogicfas_bus_reset(Scsi_Cmnd * cmd)
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(cmd->device->host->hostdata[0]);
priv->qabort = 2;
ql_zap(priv);
return SUCCESS;
}
/*
* Reset SCSI host controller
*/
static int qlogicfas_host_reset(Scsi_Cmnd * cmd)
{
return FAILED;
}
/*
* Reset SCSI device
*/
static int qlogicfas_device_reset(Scsi_Cmnd * cmd)
{
return FAILED;
}
/*
* Return info string
*/
static const char *qlogicfas_info(struct Scsi_Host *host)
{
qlogicfas_priv_t priv = (qlogicfas_priv_t)&(host->hostdata[0]);
return priv->qinfo;
}
/*
* The driver template is also needed for PCMCIA
*/
Scsi_Host_Template qlogicfas_driver_template = {
static Scsi_Host_Template qlogicfas_driver_template = {
.module = THIS_MODULE,
.name = qlogicfas_name,
.proc_name = qlogicfas_name,
.info = qlogicfas_info,
.queuecommand = qlogicfas_queuecommand,
.eh_abort_handler = qlogicfas_abort,
.eh_bus_reset_handler = qlogicfas_bus_reset,
.eh_device_reset_handler= qlogicfas_device_reset,
.eh_host_reset_handler = qlogicfas_host_reset,
.bios_param = qlogicfas_biosparam,
.info = qlogicfas408_info,
.queuecommand = qlogicfas408_queuecommand,
.eh_abort_handler = qlogicfas408_abort,
.eh_bus_reset_handler = qlogicfas408_bus_reset,
.eh_device_reset_handler= qlogicfas408_device_reset,
.eh_host_reset_handler = qlogicfas408_host_reset,
.bios_param = qlogicfas408_biosparam,
.can_queue = 1,
.this_id = -1,
.sg_tablesize = SG_ALL,
......@@ -720,7 +201,6 @@ Scsi_Host_Template qlogicfas_driver_template = {
.use_clustering = DISABLE_CLUSTERING,
};
#ifndef PCMCIA
static __init int qlogicfas_init(void)
{
if (!qlogicfas_detect(&qlogicfas_driver_template)) {
......@@ -736,16 +216,15 @@ static __init int qlogicfas_init(void)
static __exit void qlogicfas_exit(void)
{
qlogicfas_priv_t priv;
struct qlogicfas408_priv *priv;
for (priv = cards; priv != NULL; priv = priv->next)
qlogicfas_release(priv->shost);
}
MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
MODULE_DESCRIPTION("Driver for the Qlogic FAS SCSI controllers");
MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card");
MODULE_LICENSE("GPL");
module_init(qlogicfas_init);
module_exit(qlogicfas_exit);
#endif /* ifndef PCMCIA */
drivers/scsi/qlogicfas408.c 0 → 100644
View file @ 1806b777
/*----------------------------------------------------------------*/
/*
Qlogic linux driver - work in progress. No Warranty express or implied.
Use at your own risk. Support Tort Reform so you won't have to read all
these silly disclaimers.
Copyright 1994, Tom Zerucha.
tz@execpc.com
Additional Code, and much appreciated help by
Michael A. Griffith
grif@cs.ucr.edu
Thanks to Eric Youngdale and Dave Hinds for loadable module and PCMCIA
help respectively, and for suffering through my foolishness during the
debugging process.
Reference Qlogic FAS408 Technical Manual, 53408-510-00A, May 10, 1994
(you can reference it, but it is incomplete and inaccurate in places)
Version 0.46 1/30/97 - kernel 1.2.0+
Functions as standalone, loadable, and PCMCIA driver, the latter from
Dave Hinds' PCMCIA package.
Cleaned up 26/10/2002 by Alan Cox <alan@redhat.com> as part of the 2.5
SCSI driver cleanup and audit. This driver still needs work on the
following
- Non terminating hardware waits
- Some layering violations with its pcmcia stub
Redistributable under terms of the GNU General Public License
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.
*/
#include <linux/module.h>
#include <linux/blkdev.h> /* to get disk capacity */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/unistd.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include "scsi.h"
#include "hosts.h"
#include "qlogicfas408.h"
/*----------------------------------------------------------------*/
static int qlcfg5 = (XTALFREQ << 5); /* 15625/512 */
static int qlcfg6 = SYNCXFRPD;
static int qlcfg7 = SYNCOFFST;
static int qlcfg8 = (SLOWCABLE << 7) | (QL_ENABLE_PARITY << 4);
static int qlcfg9 = ((XTALFREQ + 4) / 5);
static int qlcfgc = (FASTCLK << 3) | (FASTSCSI << 4);
/*----------------------------------------------------------------*/
/*----------------------------------------------------------------*/
/* local functions */
/*----------------------------------------------------------------*/
/* error recovery - reset everything */
static void ql_zap(struct qlogicfas408_priv *priv)
{
int x;
int qbase = priv->qbase;
int int_type = priv->int_type;
x = inb(qbase + 0xd);
REG0;
outb(3, qbase + 3); /* reset SCSI */
outb(2, qbase + 3); /* reset chip */
if (x & 0x80)
REG1;
}
/*
* Do a pseudo-dma tranfer
*/
static int ql_pdma(struct qlogicfas408_priv *priv, int phase, char *request, int reqlen)
{
int j;
int qbase = priv->qbase;
j = 0;
if (phase & 1) { /* in */
#if QL_TURBO_PDMA
rtrc(4)
/* empty fifo in large chunks */
if (reqlen >= 128 && (inb(qbase + 8) & 2)) { /* full */
insl(qbase + 4, request, 32);
reqlen -= 128;
request += 128;
}
while (reqlen >= 84 && !(j & 0xc0)) /* 2/3 */
if ((j = inb(qbase + 8)) & 4)
{
insl(qbase + 4, request, 21);
reqlen -= 84;
request += 84;
}
if (reqlen >= 44 && (inb(qbase + 8) & 8)) { /* 1/3 */
insl(qbase + 4, request, 11);
reqlen -= 44;
request += 44;
}
#endif
/* until both empty and int (or until reclen is 0) */
rtrc(7)
j = 0;
while (reqlen && !((j & 0x10) && (j & 0xc0)))
{
/* while bytes to receive and not empty */
j &= 0xc0;
while (reqlen && !((j = inb(qbase + 8)) & 0x10))
{
*request++ = inb(qbase + 4);
reqlen--;
}
if (j & 0x10)
j = inb(qbase + 8);
}
} else { /* out */
#if QL_TURBO_PDMA
rtrc(4)
if (reqlen >= 128 && inb(qbase + 8) & 0x10) { /* empty */
outsl(qbase + 4, request, 32);
reqlen -= 128;
request += 128;
}
while (reqlen >= 84 && !(j & 0xc0)) /* 1/3 */
if (!((j = inb(qbase + 8)) & 8)) {
outsl(qbase + 4, request, 21);
reqlen -= 84;
request += 84;
}
if (reqlen >= 40 && !(inb(qbase + 8) & 4)) { /* 2/3 */
outsl(qbase + 4, request, 10);
reqlen -= 40;
request += 40;
}
#endif
/* until full and int (or until reclen is 0) */
rtrc(7)
j = 0;
while (reqlen && !((j & 2) && (j & 0xc0))) {
/* while bytes to send and not full */
while (reqlen && !((j = inb(qbase + 8)) & 2))
{
outb(*request++, qbase + 4);
reqlen--;
}
if (j & 2)
j = inb(qbase + 8);
}
}
/* maybe return reqlen */
return inb(qbase + 8) & 0xc0;
}
/*
* Wait for interrupt flag (polled - not real hardware interrupt)
*/
static int ql_wai(struct qlogicfas408_priv *priv)
{
int k;
int qbase = priv->qbase;
unsigned long i;
k = 0;
i = jiffies + WATCHDOG;
while (time_before(jiffies, i) && !priv->qabort &&
!((k = inb(qbase + 4)) & 0xe0)) {
barrier();
cpu_relax();
}
if (time_after_eq(jiffies, i))
return (DID_TIME_OUT);
if (priv->qabort)
return (priv->qabort == 1 ? DID_ABORT : DID_RESET);
if (k & 0x60)
ql_zap(priv);
if (k & 0x20)
return (DID_PARITY);
if (k & 0x40)
return (DID_ERROR);
return 0;
}
/*
* Initiate scsi command - queueing handler
* caller must hold host lock
*/
static void ql_icmd(Scsi_Cmnd * cmd)
{
struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
int qbase = priv->qbase;
int int_type = priv->int_type;
unsigned int i;
priv->qabort = 0;
REG0;
/* clearing of interrupts and the fifo is needed */
inb(qbase + 5); /* clear interrupts */
if (inb(qbase + 5)) /* if still interrupting */
outb(2, qbase + 3); /* reset chip */
else if (inb(qbase + 7) & 0x1f)
outb(1, qbase + 3); /* clear fifo */
while (inb(qbase + 5)); /* clear ints */
REG1;
outb(1, qbase + 8); /* set for PIO pseudo DMA */
outb(0, qbase + 0xb); /* disable ints */
inb(qbase + 8); /* clear int bits */
REG0;
outb(0x40, qbase + 0xb); /* enable features */
/* configurables */
outb(qlcfgc, qbase + 0xc);
/* config: no reset interrupt, (initiator) bus id */
outb(0x40 | qlcfg8 | priv->qinitid, qbase + 8);
outb(qlcfg7, qbase + 7);
outb(qlcfg6, qbase + 6);
/**/ outb(qlcfg5, qbase + 5); /* select timer */
outb(qlcfg9 & 7, qbase + 9); /* prescaler */
/* outb(0x99, qbase + 5); */
outb(cmd->device->id, qbase + 4);
for (i = 0; i < cmd->cmd_len; i++)
outb(cmd->cmnd[i], qbase + 2);
priv->qlcmd = cmd;
outb(0x41, qbase + 3); /* select and send command */
}
/*
* Process scsi command - usually after interrupt
*/
static unsigned int ql_pcmd(Scsi_Cmnd * cmd)
{
unsigned int i, j;
unsigned long k;
unsigned int result; /* ultimate return result */
unsigned int status; /* scsi returned status */
unsigned int message; /* scsi returned message */
unsigned int phase; /* recorded scsi phase */
unsigned int reqlen; /* total length of transfer */
struct scatterlist *sglist; /* scatter-gather list pointer */
unsigned int sgcount; /* sg counter */
char *buf;
struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
int qbase = priv->qbase;
int int_type = priv->int_type;
rtrc(1)
j = inb(qbase + 6);
i = inb(qbase + 5);
if (i == 0x20) {
return (DID_NO_CONNECT << 16);
}
i |= inb(qbase + 5); /* the 0x10 bit can be set after the 0x08 */
if (i != 0x18) {
printk(KERN_ERR "Ql:Bad Interrupt status:%02x\n", i);
ql_zap(priv);
return (DID_BAD_INTR << 16);
}
j &= 7; /* j = inb( qbase + 7 ) >> 5; */
/* correct status is supposed to be step 4 */
/* it sometimes returns step 3 but with 0 bytes left to send */
/* We can try stuffing the FIFO with the max each time, but we will get a
sequence of 3 if any bytes are left (but we do flush the FIFO anyway */
if (j != 3 && j != 4) {
printk(KERN_ERR "Ql:Bad sequence for command %d, int %02X, cmdleft = %d\n",
j, i, inb(qbase + 7) & 0x1f);
ql_zap(priv);
return (DID_ERROR << 16);
}
result = DID_OK;
if (inb(qbase + 7) & 0x1f) /* if some bytes in fifo */
outb(1, qbase + 3); /* clear fifo */
/* note that request_bufflen is the total xfer size when sg is used */
reqlen = cmd->request_bufflen;
/* note that it won't work if transfers > 16M are requested */
if (reqlen && !((phase = inb(qbase + 4)) & 6)) { /* data phase */
rtrc(2)
outb(reqlen, qbase); /* low-mid xfer cnt */
outb(reqlen >> 8, qbase + 1); /* low-mid xfer cnt */
outb(reqlen >> 16, qbase + 0xe); /* high xfer cnt */
outb(0x90, qbase + 3); /* command do xfer */
/* PIO pseudo DMA to buffer or sglist */
REG1;
if (!cmd->use_sg)
ql_pdma(priv, phase, cmd->request_buffer,
cmd->request_bufflen);
else {
sgcount = cmd->use_sg;
sglist = cmd->request_buffer;
while (sgcount--) {
if (priv->qabort) {
REG0;
return ((priv->qabort == 1 ?
DID_ABORT : DID_RESET) << 16);
}
buf = page_address(sglist->page) + sglist->offset;
if (ql_pdma(priv, phase, buf, sglist->length))
break;
sglist++;
}
}
REG0;
rtrc(2)
/*
* Wait for irq (split into second state of irq handler
* if this can take time)
*/
if ((k = ql_wai(priv)))
return (k << 16);
k = inb(qbase + 5); /* should be 0x10, bus service */
}
/*
* Enter Status (and Message In) Phase
*/
k = jiffies + WATCHDOG;
while (time_before(jiffies, k) && !priv->qabort &&
!(inb(qbase + 4) & 6))
cpu_relax(); /* wait for status phase */
if (time_after_eq(jiffies, k)) {
ql_zap(priv);
return (DID_TIME_OUT << 16);
}
/* FIXME: timeout ?? */
while (inb(qbase + 5))
cpu_relax(); /* clear pending ints */
if (priv->qabort)
return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
outb(0x11, qbase + 3); /* get status and message */
if ((k = ql_wai(priv)))
return (k << 16);
i = inb(qbase + 5); /* get chip irq stat */
j = inb(qbase + 7) & 0x1f; /* and bytes rec'd */
status = inb(qbase + 2);
message = inb(qbase + 2);
/*
* Should get function complete int if Status and message, else
* bus serv if only status
*/
if (!((i == 8 && j == 2) || (i == 0x10 && j == 1))) {
printk(KERN_ERR "Ql:Error during status phase, int=%02X, %d bytes recd\n", i, j);
result = DID_ERROR;
}
outb(0x12, qbase + 3); /* done, disconnect */
rtrc(1)
if ((k = ql_wai(priv)))
return (k << 16);
/*
* Should get bus service interrupt and disconnect interrupt
*/
i = inb(qbase + 5); /* should be bus service */
while (!priv->qabort && ((i & 0x20) != 0x20)) {
barrier();
cpu_relax();
i |= inb(qbase + 5);
}
rtrc(0)
if (priv->qabort)
return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
return (result << 16) | (message << 8) | (status & STATUS_MASK);
}
/*
* Interrupt handler
*/
static void ql_ihandl(int irq, void *dev_id, struct pt_regs *regs)
{
Scsi_Cmnd *icmd;
struct Scsi_Host *host = (struct Scsi_Host *)dev_id;
struct qlogicfas408_priv *priv = get_priv_by_host(host);
int qbase = priv->qbase;
REG0;
if (!(inb(qbase + 4) & 0x80)) /* false alarm? */
return;
if (priv->qlcmd == NULL) { /* no command to process? */
int i;
i = 16;
while (i-- && inb(qbase + 5)); /* maybe also ql_zap() */
return;
}
icmd = priv->qlcmd;
icmd->result = ql_pcmd(icmd);
priv->qlcmd = NULL;
/*
* If result is CHECK CONDITION done calls qcommand to request
* sense
*/
(icmd->scsi_done) (icmd);
}
irqreturn_t qlogicfas408_ihandl(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned long flags;
struct Scsi_Host *host = dev_id;
spin_lock_irqsave(host->host_lock, flags);
ql_ihandl(irq, dev_id, regs);
spin_unlock_irqrestore(host->host_lock, flags);
return IRQ_HANDLED;
}
/*
* Queued command
*/
int qlogicfas408_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
{
struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
if (cmd->device->id == priv->qinitid) {
cmd->result = DID_BAD_TARGET << 16;
done(cmd);
return 0;
}
cmd->scsi_done = done;
/* wait for the last command's interrupt to finish */
while (priv->qlcmd != NULL) {
barrier();
cpu_relax();
}
ql_icmd(cmd);
return 0;
}
/*
* Return bios parameters
*/
int qlogicfas408_biosparam(struct scsi_device * disk,
struct block_device *dev,
sector_t capacity, int ip[])
{
/* This should mimic the DOS Qlogic driver's behavior exactly */
ip[0] = 0x40;
ip[1] = 0x20;
ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
if (ip[2] > 1024) {
ip[0] = 0xff;
ip[1] = 0x3f;
ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
#if 0
if (ip[2] > 1023)
ip[2] = 1023;
#endif
}
return 0;
}
/*
* Abort a command in progress
*/
int qlogicfas408_abort(Scsi_Cmnd * cmd)
{
struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
priv->qabort = 1;
ql_zap(priv);
return SUCCESS;
}
/*
* Reset SCSI bus
* FIXME: This function is invoked with cmd = NULL directly by
* the PCMCIA qlogic_stub code. This wants fixing
*/
int qlogicfas408_bus_reset(Scsi_Cmnd * cmd)
{
struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
priv->qabort = 2;
ql_zap(priv);
return SUCCESS;
}
/*
* Reset SCSI host controller
*/
int qlogicfas408_host_reset(Scsi_Cmnd * cmd)
{
return FAILED;
}
/*
* Reset SCSI device
*/
int qlogicfas408_device_reset(Scsi_Cmnd * cmd)
{
return FAILED;
}
/*
* Return info string
*/
char *qlogicfas408_info(struct Scsi_Host *host)
{
struct qlogicfas408_priv *priv = get_priv_by_host(host);
return priv->qinfo;
}
/*
* Get type of chip
*/
int qlogicfas408_get_chip_type(int qbase, int int_type)
{
REG1;
return inb(qbase + 0xe) & 0xf8;
}
/*
* Perform initialization tasks
*/
void qlogicfas408_setup(int qbase, int id, int int_type)
{
outb(1, qbase + 8); /* set for PIO pseudo DMA */
REG0;
outb(0x40 | qlcfg8 | id, qbase + 8); /* (ini) bus id, disable scsi rst */
outb(qlcfg5, qbase + 5); /* select timer */
outb(qlcfg9, qbase + 9); /* prescaler */
#if QL_RESET_AT_START
outb(3, qbase + 3);
REG1;
/* FIXME: timeout */
while (inb(qbase + 0xf) & 4)
cpu_relax();
REG0;
#endif
}
/*
* Checks if this is a QLogic FAS 408
*/
int qlogicfas408_detect(int qbase, int int_type)
{
REG1;
return (((inb(qbase + 0xe) ^ inb(qbase + 0xe)) == 7) &&
((inb(qbase + 0xe) ^ inb(qbase + 0xe)) == 7));
}
/*
* Disable interrupts
*/
void qlogicfas408_disable_ints(struct qlogicfas408_priv *priv)
{
int qbase = priv->qbase;
int int_type = priv->int_type;
REG1;
outb(0, qbase + 0xb); /* disable ints */
}
/*
* Init and exit functions
*/
static int __init qlogicfas408_init(void)
{
return 0;
}
static void __exit qlogicfas408_exit(void)
{
}
MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
MODULE_DESCRIPTION("Driver for the Qlogic FAS SCSI controllers");
MODULE_LICENSE("GPL");
module_init(qlogicfas408_init);
module_exit(qlogicfas408_exit);
EXPORT_SYMBOL(qlogicfas408_info);
EXPORT_SYMBOL(qlogicfas408_queuecommand);
EXPORT_SYMBOL(qlogicfas408_abort);
EXPORT_SYMBOL(qlogicfas408_bus_reset);
EXPORT_SYMBOL(qlogicfas408_device_reset);
EXPORT_SYMBOL(qlogicfas408_host_reset);
EXPORT_SYMBOL(qlogicfas408_biosparam);
EXPORT_SYMBOL(qlogicfas408_ihandl);
EXPORT_SYMBOL(qlogicfas408_get_chip_type);
EXPORT_SYMBOL(qlogicfas408_setup);
EXPORT_SYMBOL(qlogicfas408_detect);
EXPORT_SYMBOL(qlogicfas408_disable_ints);
drivers/scsi/qlogicfas.h → drivers/scsi/qlogicfas408.h
View file @ 1806b777
/* to be used by qlogicfas and qlogic_cs */
#ifndef __QLOGICFAS_H
#define __QLOGICFAS_H
#ifndef __QLOGICFAS408_H
#define __QLOGICFAS408_H
/*----------------------------------------------------------------*/
/* Configuration */
/* Set the following to 2 to use normal interrupt (active high/totempole-
tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
drain */
#define QL_INT_ACTIVE_HIGH 2
/* Set the following to max out the speed of the PIO PseudoDMA transfers,
again, 0 tends to be slower, but more stable. */
......@@ -79,34 +73,22 @@
the assertion delay, also in 1/2 clocks (FASTCLK is ignored here). */
/*----------------------------------------------------------------*/
#ifdef PCMCIA
#undef QL_INT_ACTIVE_HIGH
#define QL_INT_ACTIVE_HIGH 0
#endif
struct qlogicfas_priv;
typedef struct qlogicfas_priv *qlogicfas_priv_t;
struct qlogicfas_priv {
struct qlogicfas408_priv {
int qbase; /* Port */
int qinitid; /* initiator ID */
int qabort; /* Flag to cause an abort */
int qlirq; /* IRQ being used */
int int_type; /* type of irq, 2 for ISA board, 0 for PCMCIA */
char qinfo[80]; /* description */
Scsi_Cmnd *qlcmd; /* current command being processed */
struct Scsi_Host *shost; /* pointer back to host */
qlogicfas_priv_t next; /* next private struct */
struct qlogicfas408_priv *next; /* next private struct */
};
extern int qlcfg5;
extern int qlcfg6;
extern int qlcfg7;
extern int qlcfg8;
extern int qlcfg9;
extern int qlcfgc;
/* The qlogic card uses two register maps - These macros select which one */
#define REG0 ( outb( inb( qbase + 0xd ) & 0x7f , qbase + 0xd ), outb( 4 , qbase + 0xd ))
#define REG1 ( outb( inb( qbase + 0xd ) | 0x80 , qbase + 0xd ), outb( 0xb4 | QL_INT_ACTIVE_HIGH , qbase + 0xd ))
#define REG1 ( outb( inb( qbase + 0xd ) | 0x80 , qbase + 0xd ), outb( 0xb4 | int_type, qbase + 0xd ))
/* following is watchdog timeout in microseconds */
#define WATCHDOG 5000000
......@@ -115,10 +97,24 @@ extern int qlcfgc;
/* the following will set the monitor border color (useful to find
where something crashed or gets stuck at and as a simple profiler) */
#if 0
#define rtrc(i) {inb(0x3da);outb(0x31,0x3c0);outb((i),0x3c0);}
#else
#define rtrc(i) {}
#endif
#endif /* __QLOGICFAS_H */
#define get_priv_by_cmd(x) (struct qlogicfas408_priv *)&((x)->device->host->hostdata[0])
#define get_priv_by_host(x) (struct qlogicfas408_priv *)&((x)->hostdata[0])
irqreturn_t qlogicfas408_ihandl(int irq, void *dev_id, struct pt_regs *regs);
int qlogicfas408_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *));
int qlogicfas408_biosparam(struct scsi_device * disk,
struct block_device *dev,
sector_t capacity, int ip[]);
int qlogicfas408_abort(Scsi_Cmnd * cmd);
int qlogicfas408_bus_reset(Scsi_Cmnd * cmd);
int qlogicfas408_host_reset(Scsi_Cmnd * cmd);
int qlogicfas408_device_reset(Scsi_Cmnd * cmd);
char *qlogicfas408_info(struct Scsi_Host *host);
int qlogicfas408_get_chip_type(int qbase, int int_type);
void qlogicfas408_setup(int qbase, int id, int int_type);
int qlogicfas408_detect(int qbase, int int_type);
void qlogicfas408_disable_ints(struct qlogicfas408_priv *priv);
#endif /* __QLOGICFAS408_H */
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