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linux/drivers/scsi/qlogicpti.c
David S. Miller f75884d28a [QLOGICPTI]: Handle INQUIRY response sniffing correctly. 
These days, in 2.6.x, even INQUIRY commands are sent using
scatter gather lists.

Bug reported by Tom 'spot' Callaway.

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-10-14 13:44:32 -07:00

1573 lines
44 KiB
C
Raw Blame History

/* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
*
* Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
*
* A lot of this driver was directly stolen from Erik H. Moe's PCI
* Qlogic ISP driver. Mucho kudos to him for this code.
*
* An even bigger kudos to John Grana at Performance Technologies
* for providing me with the hardware to write this driver, you rule
* John you really do.
*
* May, 2, 1997: Added support for QLGC,isp --jj
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/byteorder.h>
#include "qlogicpti.h"
#include <asm/sbus.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <asm/ptrace.h>
#include <asm/pgtable.h>
#include <asm/oplib.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_request.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_host.h>
#define MAX_TARGETS 16
#define MAX_LUNS 8 /* 32 for 1.31 F/W */
#define DEFAULT_LOOP_COUNT 10000
#include "qlogicpti_asm.c"
static struct qlogicpti *qptichain = NULL;
static DEFINE_SPINLOCK(qptichain_lock);
static int qptis_running = 0;
#define PACKB(a, b) (((a)<<4)|(b))
static const u_char mbox_param[] = {
PACKB(1, 1), /* MBOX_NO_OP */
PACKB(5, 5), /* MBOX_LOAD_RAM */
PACKB(2, 0), /* MBOX_EXEC_FIRMWARE */
PACKB(5, 5), /* MBOX_DUMP_RAM */
PACKB(3, 3), /* MBOX_WRITE_RAM_WORD */
PACKB(2, 3), /* MBOX_READ_RAM_WORD */
PACKB(6, 6), /* MBOX_MAILBOX_REG_TEST */
PACKB(2, 3), /* MBOX_VERIFY_CHECKSUM */
PACKB(1, 3), /* MBOX_ABOUT_FIRMWARE */
PACKB(0, 0), /* 0x0009 */
PACKB(0, 0), /* 0x000a */
PACKB(0, 0), /* 0x000b */
PACKB(0, 0), /* 0x000c */
PACKB(0, 0), /* 0x000d */
PACKB(1, 2), /* MBOX_CHECK_FIRMWARE */
PACKB(0, 0), /* 0x000f */
PACKB(5, 5), /* MBOX_INIT_REQ_QUEUE */
PACKB(6, 6), /* MBOX_INIT_RES_QUEUE */
PACKB(4, 4), /* MBOX_EXECUTE_IOCB */
PACKB(2, 2), /* MBOX_WAKE_UP */
PACKB(1, 6), /* MBOX_STOP_FIRMWARE */
PACKB(4, 4), /* MBOX_ABORT */
PACKB(2, 2), /* MBOX_ABORT_DEVICE */
PACKB(3, 3), /* MBOX_ABORT_TARGET */
PACKB(2, 2), /* MBOX_BUS_RESET */
PACKB(2, 3), /* MBOX_STOP_QUEUE */
PACKB(2, 3), /* MBOX_START_QUEUE */
PACKB(2, 3), /* MBOX_SINGLE_STEP_QUEUE */
PACKB(2, 3), /* MBOX_ABORT_QUEUE */
PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_STATUS */
PACKB(0, 0), /* 0x001e */
PACKB(1, 3), /* MBOX_GET_FIRMWARE_STATUS */
PACKB(1, 2), /* MBOX_GET_INIT_SCSI_ID */
PACKB(1, 2), /* MBOX_GET_SELECT_TIMEOUT */
PACKB(1, 3), /* MBOX_GET_RETRY_COUNT */
PACKB(1, 2), /* MBOX_GET_TAG_AGE_LIMIT */
PACKB(1, 2), /* MBOX_GET_CLOCK_RATE */
PACKB(1, 2), /* MBOX_GET_ACT_NEG_STATE */
PACKB(1, 2), /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
PACKB(1, 3), /* MBOX_GET_SBUS_PARAMS */
PACKB(2, 4), /* MBOX_GET_TARGET_PARAMS */
PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_PARAMS */
PACKB(0, 0), /* 0x002a */
PACKB(0, 0), /* 0x002b */
PACKB(0, 0), /* 0x002c */
PACKB(0, 0), /* 0x002d */
PACKB(0, 0), /* 0x002e */
PACKB(0, 0), /* 0x002f */
PACKB(2, 2), /* MBOX_SET_INIT_SCSI_ID */
PACKB(2, 2), /* MBOX_SET_SELECT_TIMEOUT */
PACKB(3, 3), /* MBOX_SET_RETRY_COUNT */
PACKB(2, 2), /* MBOX_SET_TAG_AGE_LIMIT */
PACKB(2, 2), /* MBOX_SET_CLOCK_RATE */
PACKB(2, 2), /* MBOX_SET_ACTIVE_NEG_STATE */
PACKB(2, 2), /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
PACKB(3, 3), /* MBOX_SET_SBUS_CONTROL_PARAMS */
PACKB(4, 4), /* MBOX_SET_TARGET_PARAMS */
PACKB(4, 4), /* MBOX_SET_DEV_QUEUE_PARAMS */
PACKB(0, 0), /* 0x003a */
PACKB(0, 0), /* 0x003b */
PACKB(0, 0), /* 0x003c */
PACKB(0, 0), /* 0x003d */
PACKB(0, 0), /* 0x003e */
PACKB(0, 0), /* 0x003f */
PACKB(0, 0), /* 0x0040 */
PACKB(0, 0), /* 0x0041 */
PACKB(0, 0) /* 0x0042 */
};
#define MAX_MBOX_COMMAND (sizeof(mbox_param)/sizeof(u_short))
/* queue length's _must_ be power of two: */
#define QUEUE_DEPTH(in, out, ql) ((in - out) & (ql))
#define REQ_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, \
QLOGICPTI_REQ_QUEUE_LEN)
#define RES_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
{
sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
qpti->qregs + SBUS_CTRL);
}
static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
{
sbus_writew(0, qpti->qregs + SBUS_CTRL);
}
static inline void set_sbus_cfg1(struct qlogicpti *qpti)
{
u16 val;
u8 bursts = qpti->bursts;
#if 0 /* It appears that at least PTI cards do not support
* 64-byte bursts and that setting the B64 bit actually
* is a nop and the chip ends up using the smallest burst
* size. -DaveM
*/
if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
} else
#endif
if (bursts & DMA_BURST32) {
val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
} else if (bursts & DMA_BURST16) {
val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
} else if (bursts & DMA_BURST8) {
val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
} else {
val = 0; /* No sbus bursts for you... */
}
sbus_writew(val, qpti->qregs + SBUS_CFG1);
}
static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
{
int loop_count;
u16 tmp;
if (mbox_param[param[0]] == 0)
return 1;
/* Set SBUS semaphore. */
tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
tmp |= SBUS_SEMAPHORE_LCK;
sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
/* Wait for host IRQ bit to clear. */
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
barrier();
cpu_relax();
}
if (!loop_count)
printk(KERN_EMERG "qlogicpti: mbox_command loop timeout #1\n");
/* Write mailbox command registers. */
switch (mbox_param[param[0]] >> 4) {
case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
}
/* Clear RISC interrupt. */
tmp = sbus_readw(qpti->qregs + HCCTRL);
tmp |= HCCTRL_CRIRQ;
sbus_writew(tmp, qpti->qregs + HCCTRL);
/* Clear SBUS semaphore. */
sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
/* Set HOST interrupt. */
tmp = sbus_readw(qpti->qregs + HCCTRL);
tmp |= HCCTRL_SHIRQ;
sbus_writew(tmp, qpti->qregs + HCCTRL);
/* Wait for HOST interrupt clears. */
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count &&
(sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
udelay(20);
if (!loop_count)
printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n",
param[0]);
/* Wait for SBUS semaphore to get set. */
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count &&
!(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
udelay(20);
/* Workaround for some buggy chips. */
if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
break;
}
if (!loop_count)
printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n",
param[0]);
/* Wait for MBOX busy condition to go away. */
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
udelay(20);
if (!loop_count)
printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n",
param[0]);
/* Read back output parameters. */
switch (mbox_param[param[0]] & 0xf) {
case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
}
/* Clear RISC interrupt. */
tmp = sbus_readw(qpti->qregs + HCCTRL);
tmp |= HCCTRL_CRIRQ;
sbus_writew(tmp, qpti->qregs + HCCTRL);
/* Release SBUS semaphore. */
tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
tmp &= ~(SBUS_SEMAPHORE_LCK);
sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
/* We're done. */
return 0;
}
static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
{
int i;
qpti->host_param.initiator_scsi_id = qpti->scsi_id;
qpti->host_param.bus_reset_delay = 3;
qpti->host_param.retry_count = 0;
qpti->host_param.retry_delay = 5;
qpti->host_param.async_data_setup_time = 3;
qpti->host_param.req_ack_active_negation = 1;
qpti->host_param.data_line_active_negation = 1;
qpti->host_param.data_dma_burst_enable = 1;
qpti->host_param.command_dma_burst_enable = 1;
qpti->host_param.tag_aging = 8;
qpti->host_param.selection_timeout = 250;
qpti->host_param.max_queue_depth = 256;
for(i = 0; i < MAX_TARGETS; i++) {
/*
* disconnect, parity, arq, reneg on reset, and, oddly enough
* tags...the midlayer's notion of tagged support has to match
* our device settings, and since we base whether we enable a
* tag on a per-cmnd basis upon what the midlayer sez, we
* actually enable the capability here.
*/
qpti->dev_param[i].device_flags = 0xcd;
qpti->dev_param[i].execution_throttle = 16;
if (qpti->ultra) {
qpti->dev_param[i].synchronous_period = 12;
qpti->dev_param[i].synchronous_offset = 8;
} else {
qpti->dev_param[i].synchronous_period = 25;
qpti->dev_param[i].synchronous_offset = 12;
}
qpti->dev_param[i].device_enable = 1;
}
/* this is very important to set! */
qpti->sbits = 1 << qpti->scsi_id;
}
static int qlogicpti_reset_hardware(struct Scsi_Host *host)
{
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
u_short param[6];
unsigned short risc_code_addr;
int loop_count, i;
unsigned long flags;
risc_code_addr = 0x1000; /* all load addresses are at 0x1000 */
spin_lock_irqsave(host->host_lock, flags);
sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
/* Only reset the scsi bus if it is not free. */
if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
udelay(400);
}
sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
loop_count = DEFAULT_LOOP_COUNT;
while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
udelay(20);
if (!loop_count)
printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n");
sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
set_sbus_cfg1(qpti);
qlogicpti_enable_irqs(qpti);
if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
qpti->ultra = 1;
sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
qpti->qregs + RISC_MTREG);
} else {
qpti->ultra = 0;
sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
qpti->qregs + RISC_MTREG);
}
/* reset adapter and per-device default values. */
/* do it after finding out whether we're ultra mode capable */
qlogicpti_set_hostdev_defaults(qpti);
/* Release the RISC processor. */
sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
/* Get RISC to start executing the firmware code. */
param[0] = MBOX_EXEC_FIRMWARE;
param[1] = risc_code_addr;
if (qlogicpti_mbox_command(qpti, param, 1)) {
printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
/* Set initiator scsi ID. */
param[0] = MBOX_SET_INIT_SCSI_ID;
param[1] = qpti->host_param.initiator_scsi_id;
if (qlogicpti_mbox_command(qpti, param, 1) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
/* Initialize state of the queues, both hw and sw. */
qpti->req_in_ptr = qpti->res_out_ptr = 0;
param[0] = MBOX_INIT_RES_QUEUE;
param[1] = RES_QUEUE_LEN + 1;
param[2] = (u_short) (qpti->res_dvma >> 16);
param[3] = (u_short) (qpti->res_dvma & 0xffff);
param[4] = param[5] = 0;
if (qlogicpti_mbox_command(qpti, param, 1)) {
printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
param[0] = MBOX_INIT_REQ_QUEUE;
param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
param[2] = (u_short) (qpti->req_dvma >> 16);
param[3] = (u_short) (qpti->req_dvma & 0xffff);
param[4] = param[5] = 0;
if (qlogicpti_mbox_command(qpti, param, 1)) {
printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
param[0] = MBOX_SET_RETRY_COUNT;
param[1] = qpti->host_param.retry_count;
param[2] = qpti->host_param.retry_delay;
qlogicpti_mbox_command(qpti, param, 0);
param[0] = MBOX_SET_TAG_AGE_LIMIT;
param[1] = qpti->host_param.tag_aging;
qlogicpti_mbox_command(qpti, param, 0);
for (i = 0; i < MAX_TARGETS; i++) {
param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
param[1] = (i << 8);
qlogicpti_mbox_command(qpti, param, 0);
}
param[0] = MBOX_GET_FIRMWARE_STATUS;
qlogicpti_mbox_command(qpti, param, 0);
param[0] = MBOX_SET_SELECT_TIMEOUT;
param[1] = qpti->host_param.selection_timeout;
qlogicpti_mbox_command(qpti, param, 0);
for (i = 0; i < MAX_TARGETS; i++) {
param[0] = MBOX_SET_TARGET_PARAMS;
param[1] = (i << 8);
param[2] = (qpti->dev_param[i].device_flags << 8);
/*
* Since we're now loading 1.31 f/w, force narrow/async.
*/
param[2] |= 0xc0;
param[3] = 0; /* no offset, we do not have sync mode yet */
qlogicpti_mbox_command(qpti, param, 0);
}
/*
* Always (sigh) do an initial bus reset (kicks f/w).
*/
param[0] = MBOX_BUS_RESET;
param[1] = qpti->host_param.bus_reset_delay;
qlogicpti_mbox_command(qpti, param, 0);
qpti->send_marker = 1;
spin_unlock_irqrestore(host->host_lock, flags);
return 0;
}
#define PTI_RESET_LIMIT 400
static int __init qlogicpti_load_firmware(struct qlogicpti *qpti)
{
struct Scsi_Host *host = qpti->qhost;
unsigned short csum = 0;
unsigned short param[6];
unsigned short *risc_code, risc_code_addr, risc_code_length;
unsigned long flags;
int i, timeout;
risc_code = &sbus_risc_code01[0];
risc_code_addr = 0x1000; /* all f/w modules load at 0x1000 */
risc_code_length = sbus_risc_code_length01;
spin_lock_irqsave(host->host_lock, flags);
/* Verify the checksum twice, one before loading it, and once
* afterwards via the mailbox commands.
*/
for (i = 0; i < risc_code_length; i++)
csum += risc_code[i];
if (csum) {
spin_unlock_irqrestore(host->host_lock, flags);
printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
qpti->qpti_id);
return 1;
}
sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
timeout = PTI_RESET_LIMIT;
while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
udelay(20);
if (!timeout) {
spin_unlock_irqrestore(host->host_lock, flags);
printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
return 1;
}
sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
mdelay(1);
sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
set_sbus_cfg1(qpti);
sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
qpti->ultra = 1;
sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
qpti->qregs + RISC_MTREG);
} else {
qpti->ultra = 0;
sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
qpti->qregs + RISC_MTREG);
}
sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
/* Pin lines are only stable while RISC is paused. */
sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
qpti->differential = 1;
else
qpti->differential = 0;
sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
/* This shouldn't be necessary- we've reset things so we should be
running from the ROM now.. */
param[0] = MBOX_STOP_FIRMWARE;
param[1] = param[2] = param[3] = param[4] = param[5] = 0;
if (qlogicpti_mbox_command(qpti, param, 1)) {
printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
/* Load it up.. */
for (i = 0; i < risc_code_length; i++) {
param[0] = MBOX_WRITE_RAM_WORD;
param[1] = risc_code_addr + i;
param[2] = risc_code[i];
if (qlogicpti_mbox_command(qpti, param, 1) ||
param[0] != MBOX_COMMAND_COMPLETE) {
printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
}
/* Reset the ISP again. */
sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
mdelay(1);
qlogicpti_enable_irqs(qpti);
sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
/* Ask ISP to verify the checksum of the new code. */
param[0] = MBOX_VERIFY_CHECKSUM;
param[1] = risc_code_addr;
if (qlogicpti_mbox_command(qpti, param, 1) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
/* Start using newly downloaded firmware. */
param[0] = MBOX_EXEC_FIRMWARE;
param[1] = risc_code_addr;
qlogicpti_mbox_command(qpti, param, 1);
param[0] = MBOX_ABOUT_FIRMWARE;
if (qlogicpti_mbox_command(qpti, param, 1) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
/* Snag the major and minor revisions from the result. */
qpti->fware_majrev = param[1];
qpti->fware_minrev = param[2];
qpti->fware_micrev = param[3];
/* Set the clock rate */
param[0] = MBOX_SET_CLOCK_RATE;
param[1] = qpti->clock;
if (qlogicpti_mbox_command(qpti, param, 1) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
qpti->qpti_id);
spin_unlock_irqrestore(host->host_lock, flags);
return 1;
}
if (qpti->is_pti != 0) {
/* Load scsi initiator ID and interrupt level into sbus static ram. */
param[0] = MBOX_WRITE_RAM_WORD;
param[1] = 0xff80;
param[2] = (unsigned short) qpti->scsi_id;
qlogicpti_mbox_command(qpti, param, 1);
param[0] = MBOX_WRITE_RAM_WORD;
param[1] = 0xff00;
param[2] = (unsigned short) 3;
qlogicpti_mbox_command(qpti, param, 1);
}
spin_unlock_irqrestore(host->host_lock, flags);
return 0;
}
static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
{
int curstat = sbus_readb(qpti->sreg);
curstat &= 0xf0;
if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
if (curstat != qpti->swsreg) {
int error = 0;
if (curstat & SREG_FUSE) {
error++;
printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
}
if (curstat & SREG_TPOWER) {
error++;
printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
}
if (qpti->differential &&
(curstat & SREG_DSENSE) != SREG_DSENSE) {
error++;
printk("qlogicpti%d: You have a single ended device on a "
"differential bus! Please fix!\n", qpti->qpti_id);
}
qpti->swsreg = curstat;
return error;
}
return 0;
}
static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs);
static void __init qpti_chain_add(struct qlogicpti *qpti)
{
spin_lock_irq(&qptichain_lock);
if (qptichain != NULL) {
struct qlogicpti *qlink = qptichain;
while(qlink->next)
qlink = qlink->next;
qlink->next = qpti;
} else {
qptichain = qpti;
}
qpti->next = NULL;
spin_unlock_irq(&qptichain_lock);
}
static void __init qpti_chain_del(struct qlogicpti *qpti)
{
spin_lock_irq(&qptichain_lock);
if (qptichain == qpti) {
qptichain = qpti->next;
} else {
struct qlogicpti *qlink = qptichain;
while(qlink->next != qpti)
qlink = qlink->next;
qlink->next = qpti->next;
}
qpti->next = NULL;
spin_unlock_irq(&qptichain_lock);
}
static int __init qpti_map_regs(struct qlogicpti *qpti)
{
struct sbus_dev *sdev = qpti->sdev;
qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
sdev->reg_addrs[0].reg_size,
"PTI Qlogic/ISP");
if (!qpti->qregs) {
printk("PTI: Qlogic/ISP registers are unmappable\n");
return -1;
}
if (qpti->is_pti) {
qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
sizeof(unsigned char),
"PTI Qlogic/ISP statreg");
if (!qpti->sreg) {
printk("PTI: Qlogic/ISP status register is unmappable\n");
return -1;
}
}
return 0;
}
static int __init qpti_register_irq(struct qlogicpti *qpti)
{
struct sbus_dev *sdev = qpti->sdev;
qpti->qhost->irq = qpti->irq = sdev->irqs[0];
/* We used to try various overly-clever things to
* reduce the interrupt processing overhead on
* sun4c/sun4m when multiple PTI's shared the
* same IRQ. It was too complex and messy to
* sanely maintain.
*/
if (request_irq(qpti->irq, qpti_intr,
SA_SHIRQ, "Qlogic/PTI", qpti))
goto fail;
printk("qpti%d: IRQ %s ", qpti->qpti_id, __irq_itoa(qpti->irq));
return 0;
fail:
printk("qpti%d: Cannot acquire irq line\n", qpti->qpti_id);
return -1;
}
static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
{
qpti->scsi_id = prom_getintdefault(qpti->prom_node,
"initiator-id",
-1);
if (qpti->scsi_id == -1)
qpti->scsi_id = prom_getintdefault(qpti->prom_node,
"scsi-initiator-id",
-1);
if (qpti->scsi_id == -1)
qpti->scsi_id =
prom_getintdefault(qpti->sdev->bus->prom_node,
"scsi-initiator-id", 7);
qpti->qhost->this_id = qpti->scsi_id;
qpti->qhost->max_sectors = 64;
printk("SCSI ID %d ", qpti->scsi_id);
}
static void qpti_get_bursts(struct qlogicpti *qpti)
{
struct sbus_dev *sdev = qpti->sdev;
u8 bursts, bmask;
bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
bmask = prom_getintdefault(sdev->bus->prom_node,
"burst-sizes", 0xff);
if (bmask != 0xff)
bursts &= bmask;
if (bursts == 0xff ||
(bursts & DMA_BURST16) == 0 ||
(bursts & DMA_BURST32) == 0)
bursts = (DMA_BURST32 - 1);
qpti->bursts = bursts;
}
static void qpti_get_clock(struct qlogicpti *qpti)
{
unsigned int cfreq;
/* Check for what the clock input to this card is.
* Default to 40Mhz.
*/
cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
qpti->clock = (cfreq + 500000)/1000000;
if (qpti->clock == 0) /* bullshit */
qpti->clock = 40;
}
/* The request and response queues must each be aligned
* on a page boundary.
*/
static int __init qpti_map_queues(struct qlogicpti *qpti)
{
struct sbus_dev *sdev = qpti->sdev;
#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
qpti->res_cpu = sbus_alloc_consistent(sdev,
QSIZE(RES_QUEUE_LEN),
&qpti->res_dvma);
if (qpti->res_cpu == NULL ||
qpti->res_dvma == 0) {
printk("QPTI: Cannot map response queue.\n");
return -1;
}
qpti->req_cpu = sbus_alloc_consistent(sdev,
QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
&qpti->req_dvma);
if (qpti->req_cpu == NULL ||
qpti->req_dvma == 0) {
sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
qpti->res_cpu, qpti->res_dvma);
printk("QPTI: Cannot map request queue.\n");
return -1;
}
memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
return 0;
}
/* Detect all PTI Qlogic ISP's in the machine. */
static int __init qlogicpti_detect(struct scsi_host_template *tpnt)
{
struct qlogicpti *qpti;
struct Scsi_Host *qpti_host;
struct sbus_bus *sbus;
struct sbus_dev *sdev;
int nqptis = 0, nqptis_in_use = 0;
tpnt->proc_name = "qlogicpti";
for_each_sbus(sbus) {
for_each_sbusdev(sdev, sbus) {
/* Is this a red snapper? */
if (strcmp(sdev->prom_name, "ptisp") &&
strcmp(sdev->prom_name, "PTI,ptisp") &&
strcmp(sdev->prom_name, "QLGC,isp") &&
strcmp(sdev->prom_name, "SUNW,isp"))
continue;
/* Sometimes Antares cards come up not completely
* setup, and we get a report of a zero IRQ.
* Skip over them in such cases so we survive.
*/
if (sdev->irqs[0] == 0) {
printk("qpti%d: Adapter reports no interrupt, "
"skipping over this card.", nqptis);
continue;
}
/* Yep, register and allocate software state. */
qpti_host = scsi_register(tpnt, sizeof(struct qlogicpti));
if (!qpti_host) {
printk("QPTI: Cannot register PTI Qlogic ISP SCSI host");
continue;
}
qpti = (struct qlogicpti *) qpti_host->hostdata;
/* We are wide capable, 16 targets. */
qpti_host->max_id = MAX_TARGETS;
/* Setup back pointers and misc. state. */
qpti->qhost = qpti_host;
qpti->sdev = sdev;
qpti->qpti_id = nqptis++;
qpti->prom_node = sdev->prom_node;
prom_getstring(qpti->prom_node, "name",
qpti->prom_name,
sizeof(qpti->prom_name));
/* This is not correct, actually. There's a switch
* on the PTI cards that put them into "emulation"
* mode- i.e., report themselves as QLGC,isp
* instead of PTI,ptisp. The only real substantive
* difference between non-pti and pti cards is
* the tmon register. Which is possibly even
* there for Qlogic cards, but non-functional.
*/
qpti->is_pti = (strcmp (qpti->prom_name, "QLGC,isp") != 0);
qpti_chain_add(qpti);
if (qpti_map_regs(qpti) < 0)
goto fail_unlink;
if (qpti_register_irq(qpti) < 0)
goto fail_unmap_regs;
qpti_get_scsi_id(qpti);
qpti_get_bursts(qpti);
qpti_get_clock(qpti);
/* Clear out scsi_cmnd array. */
memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
if (qpti_map_queues(qpti) < 0)
goto fail_free_irq;
/* Load the firmware. */
if (qlogicpti_load_firmware(qpti))
goto fail_unmap_queues;
if (qpti->is_pti) {
/* Check the PTI status reg. */
if (qlogicpti_verify_tmon(qpti))
goto fail_unmap_queues;
}
/* Reset the ISP and init res/req queues. */
if (qlogicpti_reset_hardware(qpti_host))
goto fail_unmap_queues;
printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
qpti->fware_minrev, qpti->fware_micrev);
{
char buffer[60];
prom_getstring (qpti->prom_node,
"isp-fcode", buffer, 60);
if (buffer[0])
printk("(Firmware %s)", buffer);
if (prom_getbool(qpti->prom_node, "differential"))
qpti->differential = 1;
}
printk (" [%s Wide, using %s interface]\n",
(qpti->ultra ? "Ultra" : "Fast"),
(qpti->differential ? "differential" : "single ended"));
nqptis_in_use++;
continue;
fail_unmap_queues:
#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
sbus_free_consistent(qpti->sdev,
QSIZE(RES_QUEUE_LEN),
qpti->res_cpu, qpti->res_dvma);
sbus_free_consistent(qpti->sdev,
QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
qpti->req_cpu, qpti->req_dvma);
#undef QSIZE
fail_free_irq:
free_irq(qpti->irq, qpti);
fail_unmap_regs:
sbus_iounmap(qpti->qregs,
qpti->sdev->reg_addrs[0].reg_size);
if (qpti->is_pti)
sbus_iounmap(qpti->sreg, sizeof(unsigned char));
fail_unlink:
qpti_chain_del(qpti);
scsi_unregister(qpti->qhost);
}
}
if (nqptis)
printk("QPTI: Total of %d PTI Qlogic/ISP hosts found, %d actually in use.\n",
nqptis, nqptis_in_use);
qptis_running = nqptis_in_use;
return nqptis;
}
static int qlogicpti_release(struct Scsi_Host *host)
{
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
/* Remove visibility from IRQ handlers. */
qpti_chain_del(qpti);
/* Shut up the card. */
sbus_writew(0, qpti->qregs + SBUS_CTRL);
/* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
free_irq(qpti->irq, qpti);
#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
sbus_free_consistent(qpti->sdev,
QSIZE(RES_QUEUE_LEN),
qpti->res_cpu, qpti->res_dvma);
sbus_free_consistent(qpti->sdev,
QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
qpti->req_cpu, qpti->req_dvma);
#undef QSIZE
sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
if (qpti->is_pti)
sbus_iounmap(qpti->sreg, sizeof(unsigned char));
return 0;
}
const char *qlogicpti_info(struct Scsi_Host *host)
{
static char buf[80];
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %s regs at %p",
__irq_itoa(qpti->qhost->irq), qpti->qregs);
return buf;
}
/* I am a certified frobtronicist. */
static inline void marker_frob(struct Command_Entry *cmd)
{
struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
memset(marker, 0, sizeof(struct Marker_Entry));
marker->hdr.entry_cnt = 1;
marker->hdr.entry_type = ENTRY_MARKER;
marker->modifier = SYNC_ALL;
marker->rsvd = 0;
}
static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
struct qlogicpti *qpti)
{
memset(cmd, 0, sizeof(struct Command_Entry));
cmd->hdr.entry_cnt = 1;
cmd->hdr.entry_type = ENTRY_COMMAND;
cmd->target_id = Cmnd->device->id;
cmd->target_lun = Cmnd->device->lun;
cmd->cdb_length = Cmnd->cmd_len;
cmd->control_flags = 0;
if (Cmnd->device->tagged_supported) {
if (qpti->cmd_count[Cmnd->device->id] == 0)
qpti->tag_ages[Cmnd->device->id] = jiffies;
if ((jiffies - qpti->tag_ages[Cmnd->device->id]) > (5*HZ)) {
cmd->control_flags = CFLAG_ORDERED_TAG;
qpti->tag_ages[Cmnd->device->id] = jiffies;
} else
cmd->control_flags = CFLAG_SIMPLE_TAG;
}
if ((Cmnd->cmnd[0] == WRITE_6) ||
(Cmnd->cmnd[0] == WRITE_10) ||
(Cmnd->cmnd[0] == WRITE_12))
cmd->control_flags |= CFLAG_WRITE;
else
cmd->control_flags |= CFLAG_READ;
cmd->time_out = 30;
memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
}
/* Do it to it baby. */
static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
{
struct dataseg *ds;
struct scatterlist *sg;
int i, n;
if (Cmnd->use_sg) {
int sg_count;
sg = (struct scatterlist *) Cmnd->buffer;
sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
ds = cmd->dataseg;
cmd->segment_cnt = sg_count;
/* Fill in first four sg entries: */
n = sg_count;
if (n > 4)
n = 4;
for (i = 0; i < n; i++, sg++) {
ds[i].d_base = sg_dma_address(sg);
ds[i].d_count = sg_dma_len(sg);
}
sg_count -= 4;
while (sg_count > 0) {
struct Continuation_Entry *cont;
++cmd->hdr.entry_cnt;
cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
in_ptr = NEXT_REQ_PTR(in_ptr);
if (in_ptr == out_ptr)
return -1;
cont->hdr.entry_type = ENTRY_CONTINUATION;
cont->hdr.entry_cnt = 0;
cont->hdr.sys_def_1 = 0;
cont->hdr.flags = 0;
cont->reserved = 0;
ds = cont->dataseg;
n = sg_count;
if (n > 7)
n = 7;
for (i = 0; i < n; i++, sg++) {
ds[i].d_base = sg_dma_address(sg);
ds[i].d_count = sg_dma_len(sg);
}
sg_count -= n;
}
} else if (Cmnd->request_bufflen) {
Cmnd->SCp.ptr = (char *)(unsigned long)
sbus_map_single(qpti->sdev,
Cmnd->request_buffer,
Cmnd->request_bufflen,
Cmnd->sc_data_direction);
cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
cmd->dataseg[0].d_count = Cmnd->request_bufflen;
cmd->segment_cnt = 1;
} else {
cmd->dataseg[0].d_base = 0;
cmd->dataseg[0].d_count = 0;
cmd->segment_cnt = 1; /* Shouldn't this be 0? */
}
/* Committed, record Scsi_Cmd so we can find it later. */
cmd->handle = in_ptr;
qpti->cmd_slots[in_ptr] = Cmnd;
qpti->cmd_count[Cmnd->device->id]++;
sbus_writew(in_ptr, qpti->qregs + MBOX4);
qpti->req_in_ptr = in_ptr;
return in_ptr;
}
static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
{
/* Temporary workaround until bug is found and fixed (one bug has been found
already, but fixing it makes things even worse) -jj */
int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
host->can_queue = host->host_busy + num_free;
host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
}
static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
{
unsigned char *buf;
unsigned int buflen;
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
buflen = sg->length;
} else {
buf = cmd->request_buffer;
buflen = cmd->request_bufflen;
}
*buf_out = buf;
return buflen;
}
static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
{
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buf - sg->offset, KM_IRQ0);
}
}
/*
* Until we scan the entire bus with inquiries, go throught this fella...
*/
static void ourdone(struct scsi_cmnd *Cmnd)
{
struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
int tgt = Cmnd->device->id;
void (*done) (struct scsi_cmnd *);
/* This grot added by DaveM, blame him for ugliness.
* The issue is that in the 2.3.x driver we use the
* host_scribble portion of the scsi command as a
* completion linked list at interrupt service time,
* so we have to store the done function pointer elsewhere.
*/
done = (void (*)(struct scsi_cmnd *))
(((unsigned long) Cmnd->SCp.Message)
#ifdef __sparc_v9__
| ((unsigned long) Cmnd->SCp.Status << 32UL)
#endif
);
if ((qpti->sbits & (1 << tgt)) == 0) {
int ok = host_byte(Cmnd->result) == DID_OK;
if (Cmnd->cmnd[0] == 0x12 && ok) {
unsigned char *iqd;
unsigned int iqd_len;
iqd_len = scsi_rbuf_get(Cmnd, &iqd);
/* tags handled in midlayer */
/* enable sync mode? */
if (iqd[7] & 0x10) {
qpti->dev_param[tgt].device_flags |= 0x10;
} else {
qpti->dev_param[tgt].synchronous_offset = 0;
qpti->dev_param[tgt].synchronous_period = 0;
}
/* are we wide capable? */
if (iqd[7] & 0x20) {
qpti->dev_param[tgt].device_flags |= 0x20;
}
scsi_rbuf_put(Cmnd, iqd);
qpti->sbits |= (1 << tgt);
} else if (!ok) {
qpti->sbits |= (1 << tgt);
}
}
done(Cmnd);
}
static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
void (*done)(struct scsi_cmnd *))
{
struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
/*
* done checking this host adapter?
* If not, then rewrite the command
* to finish through ourdone so we
* can peek at Inquiry data results.
*/
if (qpti->sbits && qpti->sbits != 0xffff) {
/* See above about in ourdone this ugliness... */
Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
#ifdef CONFIG_SPARC64
Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
#endif
return qlogicpti_queuecommand(Cmnd, ourdone);
}
/*
* We've peeked at all targets for this bus- time
* to set parameters for devices for real now.
*/
if (qpti->sbits == 0xffff) {
int i;
for(i = 0; i < MAX_TARGETS; i++) {
u_short param[6];
param[0] = MBOX_SET_TARGET_PARAMS;
param[1] = (i << 8);
param[2] = (qpti->dev_param[i].device_flags << 8);
if (qpti->dev_param[i].device_flags & 0x10) {
param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
qpti->dev_param[i].synchronous_period;
} else {
param[3] = 0;
}
(void) qlogicpti_mbox_command(qpti, param, 0);
}
/*
* set to zero so any traverse through ourdone
* doesn't start the whole process again,
*/
qpti->sbits = 0;
}
/* check to see if we're done with all adapters... */
for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
if (qpti->sbits) {
break;
}
}
/*
* if we hit the end of the chain w/o finding adapters still
* capability-configuring, then we're done with all adapters
* and can rock on..
*/
if (qpti == NULL)
Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
return qlogicpti_queuecommand(Cmnd, done);
}
/*
* The middle SCSI layer ensures that queuecommand never gets invoked
* concurrently with itself or the interrupt handler (though the
* interrupt handler may call this routine as part of
* request-completion handling).
*
* "This code must fly." -davem
*/
static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
{
struct Scsi_Host *host = Cmnd->device->host;
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
struct Command_Entry *cmd;
u_int out_ptr;
int in_ptr;
Cmnd->scsi_done = done;
in_ptr = qpti->req_in_ptr;
cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
out_ptr = sbus_readw(qpti->qregs + MBOX4);
in_ptr = NEXT_REQ_PTR(in_ptr);
if (in_ptr == out_ptr)
goto toss_command;
if (qpti->send_marker) {
marker_frob(cmd);
qpti->send_marker = 0;
if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
sbus_writew(in_ptr, qpti->qregs + MBOX4);
qpti->req_in_ptr = in_ptr;
goto toss_command;
}
cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
in_ptr = NEXT_REQ_PTR(in_ptr);
}
cmd_frob(cmd, Cmnd, qpti);
if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
goto toss_command;
update_can_queue(host, in_ptr, out_ptr);
return 0;
toss_command:
printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
qpti->qpti_id);
/* Unfortunately, unless you use the new EH code, which
* we don't, the midlayer will ignore the return value,
* which is insane. We pick up the pieces like this.
*/
Cmnd->result = DID_BUS_BUSY;
done(Cmnd);
return 1;
}
static int qlogicpti_return_status(struct Status_Entry *sts, int id)
{
int host_status = DID_ERROR;
switch (sts->completion_status) {
case CS_COMPLETE:
host_status = DID_OK;
break;
case CS_INCOMPLETE:
if (!(sts->state_flags & SF_GOT_BUS))
host_status = DID_NO_CONNECT;
else if (!(sts->state_flags & SF_GOT_TARGET))
host_status = DID_BAD_TARGET;
else if (!(sts->state_flags & SF_SENT_CDB))
host_status = DID_ERROR;
else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
host_status = DID_ERROR;
else if (!(sts->state_flags & SF_GOT_STATUS))
host_status = DID_ERROR;
else if (!(sts->state_flags & SF_GOT_SENSE))
host_status = DID_ERROR;
break;
case CS_DMA_ERROR:
case CS_TRANSPORT_ERROR:
host_status = DID_ERROR;
break;
case CS_RESET_OCCURRED:
case CS_BUS_RESET:
host_status = DID_RESET;
break;
case CS_ABORTED:
host_status = DID_ABORT;
break;
case CS_TIMEOUT:
host_status = DID_TIME_OUT;
break;
case CS_DATA_OVERRUN:
case CS_COMMAND_OVERRUN:
case CS_STATUS_OVERRUN:
case CS_BAD_MESSAGE:
case CS_NO_MESSAGE_OUT:
case CS_EXT_ID_FAILED:
case CS_IDE_MSG_FAILED:
case CS_ABORT_MSG_FAILED:
case CS_NOP_MSG_FAILED:
case CS_PARITY_ERROR_MSG_FAILED:
case CS_DEVICE_RESET_MSG_FAILED:
case CS_ID_MSG_FAILED:
case CS_UNEXP_BUS_FREE:
host_status = DID_ERROR;
break;
case CS_DATA_UNDERRUN:
host_status = DID_OK;
break;
default:
printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n",
id, sts->completion_status);
host_status = DID_ERROR;
break;
}
return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
}
static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
{
struct scsi_cmnd *Cmnd, *done_queue = NULL;
struct Status_Entry *sts;
u_int in_ptr, out_ptr;
if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
return NULL;
in_ptr = sbus_readw(qpti->qregs + MBOX5);
sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
switch (sbus_readw(qpti->qregs + MBOX0)) {
case ASYNC_SCSI_BUS_RESET:
case EXECUTION_TIMEOUT_RESET:
qpti->send_marker = 1;
break;
case INVALID_COMMAND:
case HOST_INTERFACE_ERROR:
case COMMAND_ERROR:
case COMMAND_PARAM_ERROR:
break;
};
sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
}
/* This looks like a network driver! */
out_ptr = qpti->res_out_ptr;
while (out_ptr != in_ptr) {
u_int cmd_slot;
sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
out_ptr = NEXT_RES_PTR(out_ptr);
/* We store an index in the handle, not the pointer in
* some form. This avoids problems due to the fact
* that the handle provided is only 32-bits. -DaveM
*/
cmd_slot = sts->handle;
Cmnd = qpti->cmd_slots[cmd_slot];
qpti->cmd_slots[cmd_slot] = NULL;
if (sts->completion_status == CS_RESET_OCCURRED ||
sts->completion_status == CS_ABORTED ||
(sts->status_flags & STF_BUS_RESET))
qpti->send_marker = 1;
if (sts->state_flags & SF_GOT_SENSE)
memcpy(Cmnd->sense_buffer, sts->req_sense_data,
sizeof(Cmnd->sense_buffer));
if (sts->hdr.entry_type == ENTRY_STATUS)
Cmnd->result =
qlogicpti_return_status(sts, qpti->qpti_id);
else
Cmnd->result = DID_ERROR << 16;
if (Cmnd->use_sg) {
sbus_unmap_sg(qpti->sdev,
(struct scatterlist *)Cmnd->buffer,
Cmnd->use_sg,
Cmnd->sc_data_direction);
} else {
sbus_unmap_single(qpti->sdev,
(__u32)((unsigned long)Cmnd->SCp.ptr),
Cmnd->request_bufflen,
Cmnd->sc_data_direction);
}
qpti->cmd_count[Cmnd->device->id]--;
sbus_writew(out_ptr, qpti->qregs + MBOX5);
Cmnd->host_scribble = (unsigned char *) done_queue;
done_queue = Cmnd;
}
qpti->res_out_ptr = out_ptr;
return done_queue;
}
static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct qlogicpti *qpti = dev_id;
unsigned long flags;
struct scsi_cmnd *dq;
spin_lock_irqsave(qpti->qhost->host_lock, flags);
dq = qlogicpti_intr_handler(qpti);
if (dq != NULL) {
do {
struct scsi_cmnd *next;
next = (struct scsi_cmnd *) dq->host_scribble;
dq->scsi_done(dq);
dq = next;
} while (dq != NULL);
}
spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
return IRQ_HANDLED;
}
static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
{
u_short param[6];
struct Scsi_Host *host = Cmnd->device->host;
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
int return_status = SUCCESS;
u32 cmd_cookie;
int i;
printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n",
(int)Cmnd->device->id, (int)Cmnd->device->lun);
qlogicpti_disable_irqs(qpti);
/* Find the 32-bit cookie we gave to the firmware for
* this command.
*/
for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
if (qpti->cmd_slots[i] == Cmnd)
break;
cmd_cookie = i;
param[0] = MBOX_ABORT;
param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
param[2] = cmd_cookie >> 16;
param[3] = cmd_cookie & 0xffff;
if (qlogicpti_mbox_command(qpti, param, 0) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]);
return_status = FAILED;
}
qlogicpti_enable_irqs(qpti);
return return_status;
}
static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
{
u_short param[6];
struct Scsi_Host *host = Cmnd->device->host;
struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
int return_status = SUCCESS;
printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n");
qlogicpti_disable_irqs(qpti);
param[0] = MBOX_BUS_RESET;
param[1] = qpti->host_param.bus_reset_delay;
if (qlogicpti_mbox_command(qpti, param, 0) ||
(param[0] != MBOX_COMMAND_COMPLETE)) {
printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]);
return_status = FAILED;
}
qlogicpti_enable_irqs(qpti);
return return_status;
}
static struct scsi_host_template driver_template = {
.detect = qlogicpti_detect,
.release = qlogicpti_release,
.info = qlogicpti_info,
.queuecommand = qlogicpti_queuecommand_slow,
.eh_abort_handler = qlogicpti_abort,
.eh_bus_reset_handler = qlogicpti_reset,
.can_queue = QLOGICPTI_REQ_QUEUE_LEN,
.this_id = 7,
.sg_tablesize = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"
MODULE_LICENSE("GPL");
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