Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1541 insertions, 0 deletions

diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
new file mode 100644
index 00000000000..a917ab7475a
--- /dev/null
+++ b/drivers/scsi/qlogicpti.c
@@ -0,0 +1,1541 @@
+/* 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);
+}
+
+/*
+ * 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;
+
+			if (Cmnd->use_sg != 0)
+				BUG();
+
+			iqd = ((unsigned char *)Cmnd->buffer);
+
+			/* 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;
+			}
+			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");
+