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, 1850 insertions, 0 deletions

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
new file mode 100644
index 000000000000..cf1822a6361c
--- /dev/null
+++ b/drivers/block/cpqarray.c
@@ -0,0 +1,1850 @@
+/*
+ *    Disk Array driver for Compaq SMART2 Controllers
+ *    Copyright 1998 Compaq Computer Corporation
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *    NON INFRINGEMENT.  See the GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
+ *
+ */
+#include <linux/config.h>	/* CONFIG_PROC_FS */
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/bio.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/major.h>
+#include <linux/fs.h>
+#include <linux/blkpg.h>
+#include <linux/timer.h>
+#include <linux/proc_fs.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/init.h>
+#include <linux/hdreg.h>
+#include <linux/spinlock.h>
+#include <linux/blkdev.h>
+#include <linux/genhd.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+#define SMART2_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
+
+#define DRIVER_NAME "Compaq SMART2 Driver (v 2.6.0)"
+#define DRIVER_VERSION SMART2_DRIVER_VERSION(2,6,0)
+
+/* Embedded module documentation macros - see modules.h */
+/* Original author Chris Frantz - Compaq Computer Corporation */
+MODULE_AUTHOR("Compaq Computer Corporation");
+MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
+MODULE_LICENSE("GPL");
+
+#include "cpqarray.h"
+#include "ida_cmd.h"
+#include "smart1,2.h"
+#include "ida_ioctl.h"
+
+#define READ_AHEAD	128
+#define NR_CMDS		128 /* This could probably go as high as ~400 */
+
+#define MAX_CTLR	8
+#define CTLR_SHIFT	8
+
+#define CPQARRAY_DMA_MASK	0xFFFFFFFF	/* 32 bit DMA */
+
+static int nr_ctlr;
+static ctlr_info_t *hba[MAX_CTLR];
+
+static int eisa[8];
+
+#define NR_PRODUCTS (sizeof(products)/sizeof(struct board_type))
+
+/*  board_id = Subsystem Device ID & Vendor ID
+ *  product = Marketing Name for the board
+ *  access = Address of the struct of function pointers 
+ */
+static struct board_type products[] = {
+	{ 0x0040110E, "IDA",			&smart1_access },
+	{ 0x0140110E, "IDA-2",			&smart1_access },
+	{ 0x1040110E, "IAES",			&smart1_access },
+	{ 0x2040110E, "SMART",			&smart1_access },
+	{ 0x3040110E, "SMART-2/E",		&smart2e_access },
+	{ 0x40300E11, "SMART-2/P",		&smart2_access },
+	{ 0x40310E11, "SMART-2SL",		&smart2_access },
+	{ 0x40320E11, "Smart Array 3200",	&smart2_access },
+	{ 0x40330E11, "Smart Array 3100ES",	&smart2_access },
+	{ 0x40340E11, "Smart Array 221",	&smart2_access },
+	{ 0x40400E11, "Integrated Array",	&smart4_access },
+	{ 0x40480E11, "Compaq Raid LC2",        &smart4_access },
+	{ 0x40500E11, "Smart Array 4200",	&smart4_access },
+	{ 0x40510E11, "Smart Array 4250ES",	&smart4_access },
+	{ 0x40580E11, "Smart Array 431",	&smart4_access },
+};
+
+/* define the PCI info for the PCI cards this driver can control */
+static const struct pci_device_id cpqarray_pci_device_id[] =
+{
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
+		0x0E11, 0x4058, 0, 0, 0},       /* SA431 */
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
+		0x0E11, 0x4051, 0, 0, 0},      /* SA4250ES */
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
+		0x0E11, 0x4050, 0, 0, 0},      /* SA4200 */
+	{ PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
+		0x0E11, 0x4048, 0, 0, 0},       /* LC2 */
+	{ PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
+		0x0E11, 0x4040, 0, 0, 0},      /* Integrated Array */
+	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
+		0x0E11, 0x4034, 0, 0, 0},       /* SA 221 */
+	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
+		0x0E11, 0x4033, 0, 0, 0},       /* SA 3100ES*/
+	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
+		0x0E11, 0x4032, 0, 0, 0},       /* SA 3200*/
+	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
+		0x0E11, 0x4031, 0, 0, 0},       /* SA 2SL*/
+	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
+		0x0E11, 0x4030, 0, 0, 0},       /* SA 2P */
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
+
+static struct gendisk *ida_gendisk[MAX_CTLR][NWD];
+
+/* Debug... */
+#define DBG(s)	do { s } while(0)
+/* Debug (general info)... */
+#define DBGINFO(s) do { } while(0)
+/* Debug Paranoid... */
+#define DBGP(s)  do { } while(0)
+/* Debug Extra Paranoid... */
+#define DBGPX(s) do { } while(0)
+
+static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
+static void __iomem *remap_pci_mem(ulong base, ulong size);
+static int cpqarray_eisa_detect(void);
+static int pollcomplete(int ctlr);
+static void getgeometry(int ctlr);
+static void start_fwbk(int ctlr);
+
+static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
+static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
+
+static void free_hba(int i);
+static int alloc_cpqarray_hba(void);
+
+static int sendcmd(
+	__u8	cmd,
+	int	ctlr,
+	void	*buff,
+	size_t	size,
+	unsigned int blk,
+	unsigned int blkcnt,
+	unsigned int log_unit );
+
+static int ida_open(struct inode *inode, struct file *filep);
+static int ida_release(struct inode *inode, struct file *filep);
+static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg);
+static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
+
+static void do_ida_request(request_queue_t *q);
+static void start_io(ctlr_info_t *h);
+
+static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
+static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
+static inline void complete_buffers(struct bio *bio, int ok);
+static inline void complete_command(cmdlist_t *cmd, int timeout);
+
+static irqreturn_t do_ida_intr(int irq, void *dev_id, struct pt_regs * regs);
+static void ida_timer(unsigned long tdata);
+static int ida_revalidate(struct gendisk *disk);
+static int revalidate_allvol(ctlr_info_t *host);
+static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
+
+#ifdef CONFIG_PROC_FS
+static void ida_procinit(int i);
+static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data);
+#else
+static void ida_procinit(int i) {}
+#endif
+
+static inline drv_info_t *get_drv(struct gendisk *disk)
+{
+	return disk->private_data;
+}
+
+static inline ctlr_info_t *get_host(struct gendisk *disk)
+{
+	return disk->queue->queuedata;
+}
+
+
+static struct block_device_operations ida_fops  = {
+	.owner		= THIS_MODULE,
+	.open		= ida_open,
+	.release	= ida_release,
+	.ioctl		= ida_ioctl,
+	.revalidate_disk= ida_revalidate,
+};
+
+
+#ifdef CONFIG_PROC_FS
+
+static struct proc_dir_entry *proc_array;
+
+/*
+ * Get us a file in /proc/array that says something about each controller.
+ * Create /proc/array if it doesn't exist yet.
+ */
+static void __init ida_procinit(int i)
+{
+	if (proc_array == NULL) {
+		proc_array = proc_mkdir("cpqarray", proc_root_driver);
+		if (!proc_array) return;
+	}
+
+	create_proc_read_entry(hba[i]->devname, 0, proc_array,
+			       ida_proc_get_info, hba[i]);
+}
+
+/*
+ * Report information about this controller.
+ */
+static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data)
+{
+	off_t pos = 0;
+	off_t len = 0;
+	int size, i, ctlr;
+	ctlr_info_t *h = (ctlr_info_t*)data;
+	drv_info_t *drv;
+#ifdef CPQ_PROC_PRINT_QUEUES
+	cmdlist_t *c;
+	unsigned long flags;
+#endif
+
+	ctlr = h->ctlr;
+	size = sprintf(buffer, "%s:  Compaq %s Controller\n"
+		"       Board ID: 0x%08lx\n"
+		"       Firmware Revision: %c%c%c%c\n"
+		"       Controller Sig: 0x%08lx\n"
+		"       Memory Address: 0x%08lx\n"
+		"       I/O Port: 0x%04x\n"
+		"       IRQ: %d\n"
+		"       Logical drives: %d\n"
+		"       Physical drives: %d\n\n"
+		"       Current Q depth: %d\n"
+		"       Max Q depth since init: %d\n\n",
+		h->devname, 
+		h->product_name,
+		(unsigned long)h->board_id,
+		h->firm_rev[0], h->firm_rev[1], h->firm_rev[2], h->firm_rev[3],
+		(unsigned long)h->ctlr_sig, (unsigned long)h->vaddr,
+		(unsigned int) h->io_mem_addr, (unsigned int)h->intr,
+		h->log_drives, h->phys_drives,
+		h->Qdepth, h->maxQsinceinit);
+
+	pos += size; len += size;
+	
+	size = sprintf(buffer+len, "Logical Drive Info:\n");
+	pos += size; len += size;
+
+	for(i=0; i<h->log_drives; i++) {
+		drv = &h->drv[i];
+		size = sprintf(buffer+len, "ida/c%dd%d: blksz=%d nr_blks=%d\n",
+				ctlr, i, drv->blk_size, drv->nr_blks);
+		pos += size; len += size;
+	}
+
+#ifdef CPQ_PROC_PRINT_QUEUES
+	spin_lock_irqsave(IDA_LOCK(h->ctlr), flags); 
+	size = sprintf(buffer+len, "\nCurrent Queues:\n");
+	pos += size; len += size;
+
+	c = h->reqQ;
+	size = sprintf(buffer+len, "reqQ = %p", c); pos += size; len += size;
+	if (c) c=c->next;
+	while(c && c != h->reqQ) {
+		size = sprintf(buffer+len, "->%p", c);
+		pos += size; len += size;
+		c=c->next;
+	}
+
+	c = h->cmpQ;
+	size = sprintf(buffer+len, "\ncmpQ = %p", c); pos += size; len += size;
+	if (c) c=c->next;
+	while(c && c != h->cmpQ) {
+		size = sprintf(buffer+len, "->%p", c);
+		pos += size; len += size;
+		c=c->next;
+	}
+
+	size = sprintf(buffer+len, "\n"); pos += size; len += size;
+	spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags); 
+#endif
+	size = sprintf(buffer+len, "nr_allocs = %d\nnr_frees = %d\n",
+			h->nr_allocs, h->nr_frees);
+	pos += size; len += size;
+
+	*eof = 1;
+	*start = buffer+offset;
+	len -= offset;
+	if (len>length)
+		len = length;
+	return len;
+}
+#endif /* CONFIG_PROC_FS */
+
+module_param_array(eisa, int, NULL, 0);
+
+static void release_io_mem(ctlr_info_t *c)
+{
+	/* if IO mem was not protected do nothing */
+	if( c->io_mem_addr == 0)
+		return;
+	release_region(c->io_mem_addr, c->io_mem_length);
+	c->io_mem_addr = 0;
+	c->io_mem_length = 0;
+}
+
+static void __devexit cpqarray_remove_one(int i)
+{
+	int j;
+	char buff[4];
+
+	/* sendcmd will turn off interrupt, and send the flush...
+	 * To write all data in the battery backed cache to disks
+	 * no data returned, but don't want to send NULL to sendcmd */
+	if( sendcmd(FLUSH_CACHE, i, buff, 4, 0, 0, 0))
+	{
+		printk(KERN_WARNING "Unable to flush cache on controller %d\n",
+				i);
+	}
+	free_irq(hba[i]->intr, hba[i]);
+	iounmap(hba[i]->vaddr);
+	unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
+	del_timer(&hba[i]->timer);
+	remove_proc_entry(hba[i]->devname, proc_array);
+	pci_free_consistent(hba[i]->pci_dev,
+			NR_CMDS * sizeof(cmdlist_t), (hba[i]->cmd_pool),
+			hba[i]->cmd_pool_dhandle);
+	kfree(hba[i]->cmd_pool_bits);
+	for(j = 0; j < NWD; j++) {
+		if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
+			del_gendisk(ida_gendisk[i][j]);
+		devfs_remove("ida/c%dd%d",i,j);
+		put_disk(ida_gendisk[i][j]);
+	}
+	blk_cleanup_queue(hba[i]->queue);
+	release_io_mem(hba[i]);
+	free_hba(i);
+}
+
+static void __devexit cpqarray_remove_one_pci (struct pci_dev *pdev)
+{
+	int i;
+	ctlr_info_t *tmp_ptr;
+
+	if (pci_get_drvdata(pdev) == NULL) {
+		printk( KERN_ERR "cpqarray: Unable to remove device \n");
+		return;
+	}
+
+	tmp_ptr = pci_get_drvdata(pdev);
+	i = tmp_ptr->ctlr;
+	if (hba[i] == NULL) {
+		printk(KERN_ERR "cpqarray: controller %d appears to have"
+			"already been removed \n", i);
+		return;
+        }
+	pci_set_drvdata(pdev, NULL);
+
+	cpqarray_remove_one(i);
+}
+
+/* removing an instance that was not removed automatically..
+ * must be an eisa card.
+ */
+static void __devexit cpqarray_remove_one_eisa (int i)
+{
+	if (hba[i] == NULL) {
+		printk(KERN_ERR "cpqarray: controller %d appears to have"
+			"already been removed \n", i);
+		return;
+        }
+	cpqarray_remove_one(i);
+}
+
+/* pdev is NULL for eisa */
+static int cpqarray_register_ctlr( int i, struct pci_dev *pdev)
+{
+	request_queue_t *q;
+	int j;
+
+	/* 
+	 * register block devices
+	 * Find disks and fill in structs
+	 * Get an interrupt, set the Q depth and get into /proc
+	 */
+
+	/* If this successful it should insure that we are the only */
+	/* instance of the driver */
+	if (register_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname)) {
+		goto Enomem4;
+	}
+	hba[i]->access.set_intr_mask(hba[i], 0);
+	if (request_irq(hba[i]->intr, do_ida_intr,
+		SA_INTERRUPT|SA_SHIRQ|SA_SAMPLE_RANDOM,
+		hba[i]->devname, hba[i]))
+	{
+		printk(KERN_ERR "cpqarray: Unable to get irq %d for %s\n",
+				hba[i]->intr, hba[i]->devname);
+		goto Enomem3;
+	}
+		
+	for (j=0; j<NWD; j++) {
+		ida_gendisk[i][j] = alloc_disk(1 << NWD_SHIFT);
+		if (!ida_gendisk[i][j])
+			goto Enomem2;
+	}
+
+	hba[i]->cmd_pool = (cmdlist_t *)pci_alloc_consistent(
+		hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
+		&(hba[i]->cmd_pool_dhandle));
+	hba[i]->cmd_pool_bits = kmalloc(
+		((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long),
+		GFP_KERNEL);
+
+	if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
+			goto Enomem1;
+
+	memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
+	memset(hba[i]->cmd_pool_bits, 0, ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long));
+	printk(KERN_INFO "cpqarray: Finding drives on %s",
+		hba[i]->devname);
+
+	spin_lock_init(&hba[i]->lock);
+	q = blk_init_queue(do_ida_request, &hba[i]->lock);
+	if (!q)
+		goto Enomem1;
+
+	hba[i]->queue = q;
+	q->queuedata = hba[i];
+
+	getgeometry(i);
+	start_fwbk(i);
+
+	ida_procinit(i);
+
+	if (pdev)
+		blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
+
+	/* This is a hardware imposed limit. */
+	blk_queue_max_hw_segments(q, SG_MAX);
+
+	/* This is a driver limit and could be eliminated. */
+	blk_queue_max_phys_segments(q, SG_MAX);
+	
+	init_timer(&hba[i]->timer);
+	hba[i]->timer.expires = jiffies + IDA_TIMER;
+	hba[i]->timer.data = (unsigned long)hba[i];
+	hba[i]->timer.function = ida_timer;
+	add_timer(&hba[i]->timer);
+
+	/* Enable IRQ now that spinlock and rate limit timer are set up */
+	hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
+
+	for(j=0; j<NWD; j++) {
+		struct gendisk *disk = ida_gendisk[i][j];
+		drv_info_t *drv = &hba[i]->drv[j];
+		sprintf(disk->disk_name, "ida/c%dd%d", i, j);
+		disk->major = COMPAQ_SMART2_MAJOR + i;
+		disk->first_minor = j<<NWD_SHIFT;
+		disk->fops = &ida_fops;
+		if (j && !drv->nr_blks)
+			continue;
+		blk_queue_hardsect_size(hba[i]->queue, drv->blk_size);
+		set_capacity(disk, drv->nr_blks);
+		disk->queue = hba[i]->queue;
+		disk->private_data = drv;
+		add_disk(disk);
+	}
+
+	/* done ! */
+	return(i);
+
+Enomem1:
+	nr_ctlr = i; 
+	kfree(hba[i]->cmd_pool_bits);
+	if (hba[i]->cmd_pool)
+		pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t), 
+				    hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
+Enomem2:
+	while (j--) {
+		put_disk(ida_gendisk[i][j]);
+		ida_gendisk[i][j] = NULL;
+	}
+	free_irq(hba[i]->intr, hba[i]);
+Enomem3:
+	unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
+Enomem4:
+	if (pdev)
+		pci_set_drvdata(pdev, NULL);
+	release_io_mem(hba[i]);
+	free_hba(i);
+
+	printk( KERN_ERR "cpqarray: out of memory");
+
+	return -1;
+}
+
+static int __init cpqarray_init_one( struct pci_dev *pdev,
+	const struct pci_device_id *ent)
+{
+	int i;
+
+	printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
+			" bus %d dev %d func %d\n",
+			pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
+			PCI_FUNC(pdev->devfn));
+	i = alloc_cpqarray_hba();
+	if( i < 0 )
+		return (-1);
+	memset(hba[i], 0, sizeof(ctlr_info_t));
+	sprintf(hba[i]->devname, "ida%d", i);
+	hba[i]->ctlr = i;
+	/* Initialize the pdev driver private data */
+	pci_set_drvdata(pdev, hba[i]);
+
+	if (cpqarray_pci_init(hba[i], pdev) != 0) {
+		pci_set_drvdata(pdev, NULL);
+		release_io_mem(hba[i]);
+		free_hba(i);
+		return -1;
+	}
+
+	return (cpqarray_register_ctlr(i, pdev));
+}
+
+static struct pci_driver cpqarray_pci_driver = {
+	.name = "cpqarray",
+	.probe = cpqarray_init_one,
+	.remove = __devexit_p(cpqarray_remove_one_pci),
+	.id_table = cpqarray_pci_device_id,
+};
+
+/*
+ *  This is it.  Find all the controllers and register them.
+ *  returns the number of block devices registered.
+ */
+static int __init cpqarray_init(void)
+{
+	int num_cntlrs_reg = 0;
+	int i;
+	int rc = 0;
+
+	/* detect controllers */
+	printk(DRIVER_NAME "\n");
+
+	rc = pci_register_driver(&cpqarray_pci_driver);
+	if (rc)
+		return rc;
+	cpqarray_eisa_detect();
+	
+	for (i=0; i < MAX_CTLR; i++) {
+		if (hba[i] != NULL)
+			num_cntlrs_reg++;
+	}
+
+	return(num_cntlrs_reg);
+}
+
+/* Function to find the first free pointer into our hba[] array */
+/* Returns -1 if no free entries are left.  */
+static int alloc_cpqarray_hba(void)
+{
+	int i;
+
+	for(i=0; i< MAX_CTLR; i++) {
+		if (hba[i] == NULL) {
+			hba[i] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
+			if(hba[i]==NULL) {
+				printk(KERN_ERR "cpqarray: out of memory.\n");
+				return (-1);
+			}
+			return (i);
+		}
+	}
+	printk(KERN_WARNING "cpqarray: This driver supports a maximum"
+		" of 8 controllers.\n");
+	return(-1);
+}
+
+static void free_hba(int i)
+{
+	kfree(hba[i]);
+	hba[i]=NULL;
+}
+
+/*
+ * Find the IO address of the controller, its IRQ and so forth.  Fill
+ * in some basic stuff into the ctlr_info_t structure.
+ */
+static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
+{
+	ushort vendor_id, device_id, command;
+	unchar cache_line_size, latency_timer;
+	unchar irq, revision;
+	unsigned long addr[6];
+	__u32 board_id;
+
+	int i;
+
+	c->pci_dev = pdev;
+	if (pci_enable_device(pdev)) {
+		printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
+		return -1;
+	}
+	vendor_id = pdev->vendor;
+	device_id = pdev->device;
+	irq = pdev->irq;
+
+	for(i=0; i<6; i++)
+		addr[i] = pci_resource_start(pdev, i);
+
+	if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
+	{
+		printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
+		return -1;
+	}
+
+	pci_read_config_word(pdev, PCI_COMMAND, &command);
+	pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
+	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
+	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
+
+	pci_read_config_dword(pdev, 0x2c, &board_id);
+
+	/* check to see if controller has been disabled */
+	if(!(command & 0x02)) {
+		printk(KERN_WARNING
+			"cpqarray: controller appears to be disabled\n");
+		return(-1);
+	}
+
+DBGINFO(
+	printk("vendor_id = %x\n", vendor_id);
+	printk("device_id = %x\n", device_id);
+	printk("command = %x\n", command);
+	for(i=0; i<6; i++)
+		printk("addr[%d] = %lx\n", i, addr[i]);
+	printk("revision = %x\n", revision);
+	printk("irq = %x\n", irq);
+	printk("cache_line_size = %x\n", cache_line_size);
+	printk("latency_timer = %x\n", latency_timer);
+	printk("board_id = %x\n", board_id);
+);
+
+	c->intr = irq;
+
+	for(i=0; i<6; i++) {
+		if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
+		{ /* IO space */
+			c->io_mem_addr = addr[i];
+			c->io_mem_length = pci_resource_end(pdev, i)
+				- pci_resource_start(pdev, i) + 1;
+			if(!request_region( c->io_mem_addr, c->io_mem_length,
+				"cpqarray"))
+			{
+				printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
+				c->io_mem_addr = 0;
+				c->io_mem_length = 0;
+			}
+			break;
+		}
+	}
+
+	c->paddr = 0;
+	for(i=0; i<6; i++)
+		if (!(pci_resource_flags(pdev, i) &
+				PCI_BASE_ADDRESS_SPACE_IO)) {
+			c->paddr = pci_resource_start (pdev, i);
+			break;
+		}
+	if (!c->paddr)
+		return -1;
+	c->vaddr = remap_pci_mem(c->paddr, 128);
+	if (!c->vaddr)
+		return -1;
+	c->board_id = board_id;
+
+	for(i=0; i<NR_PRODUCTS; i++) {
+		if (board_id == products[i].board_id) {
+			c->product_name = products[i].product_name;
+			c->access = *(products[i].access);
+			break;
+		}
+	}
+	if (i == NR_PRODUCTS) {
+		printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
+			" to access the SMART Array controller %08lx\n", 
+				(unsigned long)board_id);
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Map (physical) PCI mem into (virtual) kernel space
+ */
+static void __iomem *remap_pci_mem(ulong base, ulong size)
+{
+        ulong page_base        = ((ulong) base) & PAGE_MASK;
+        ulong page_offs        = ((ulong) base) - page_base;
+        void __iomem *page_remapped    = ioremap(page_base, page_offs+size);
+
+        return (page_remapped ? (page_remapped + page_offs) : NULL);
+}
+
+#ifndef MODULE
+/*
+ * Config string is a comma separated set of i/o addresses of EISA cards.
+ */
+static int cpqarray_setup(char *str)
+{
+	int i, ints[9];
+
+	(void)get_options(str, ARRAY_SIZE(ints), ints);
+
+	for(i=0; i<ints[0] && i<8; i++)
+		eisa[i] = ints[i+1];
+	return 1;
+}
+
+__setup("smart2=", cpqarray_setup);
+
+#endif
+
+/*
+ * Find an EISA controller's signature.  Set up an hba if we find it.
+ */
+static int cpqarray_eisa_detect(void)
+{
+	int i=0, j;
+	__u32 board_id;
+	int intr;
+	int ctlr;
+	int num_ctlr = 0;
+
+	while(i<8 && eisa[i]) {
+		ctlr = alloc_cpqarray_hba();
+		if(ctlr == -1)
+			break;
+		board_id = inl(eisa[i]+0xC80);
+		for(j=0; j < NR_PRODUCTS; j++)
+			if (board_id == products[j].board_id) 
+				break;
+
+		if (j == NR_PRODUCTS) {
+			printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
+				" to access the SMART Array controller %08lx\n",				 (unsigned long)board_id);
+			continue;
+		}
+
+		memset(hba[ctlr], 0, sizeof(ctlr_info_t));
+		hba[ctlr]->io_mem_addr = eisa[i];
+		hba[ctlr]->io_mem_length = 0x7FF;
+		if(!request_region(hba[ctlr]->io_mem_addr,
+				hba[ctlr]->io_mem_length,
+				"cpqarray"))
+		{
+			printk(KERN_WARNING "cpqarray: I/O range already in "
+					"use addr = %lx length = %ld\n",
+					hba[ctlr]->io_mem_addr,
+					hba[ctlr]->io_mem_length);
+			free_hba(ctlr);
+			continue;
+		}
+
+		/*
+		 * Read the config register to find our interrupt
+		 */
+		intr = inb(eisa[i]+0xCC0) >> 4;
+		if (intr & 1) intr = 11;
+		else if (intr & 2) intr = 10;
+		else if (intr & 4) intr = 14;
+		else if (intr & 8) intr = 15;
+		
+		hba[ctlr]->intr = intr;
+		sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
+		hba[ctlr]->product_name = products[j].product_name;
+		hba[ctlr]->access = *(products[j].access);
+		hba[ctlr]->ctlr = ctlr;
+		hba[ctlr]->board_id = board_id;
+		hba[ctlr]->pci_dev = NULL; /* not PCI */
+
+DBGINFO(
+	printk("i = %d, j = %d\n", i, j);
+	printk("irq = %x\n", intr);
+	printk("product name = %s\n", products[j].product_name);
+	printk("board_id = %x\n", board_id);
+);
+
+		num_ctlr++;
+		i++;
+
+		if (cpqarray_register_ctlr(ctlr, NULL) == -1)
+			printk(KERN_WARNING
+				"cpqarray: Can't register EISA controller %d\n",
+				ctlr);
+
+	}
+
+	return num_ctlr;
+}
+
+/*
+ * Open.  Make sure the device is really there.
+ */
+static int ida_open(struct inode *inode, struct file *filep)
+{
+	drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
+	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
+
+	DBGINFO(printk("ida_open %s\n", inode->i_bdev->bd_disk->disk_name));
+	/*
+	 * Root is allowed to open raw volume zero even if it's not configured
+	 * so array config can still work.  I don't think I really like this,
+	 * but I'm already using way to many device nodes to claim another one
+	 * for "raw controller".
+	 */
+	if (!drv->nr_blks) {
+		if (!capable(CAP_SYS_RAWIO))
+			return -ENXIO;
+		if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
+			return -ENXIO;
+	}
+	host->usage_count++;
+	return 0;
+}
+
+/*
+ * Close.  Sync first.
+ */
+static int ida_release(struct inode *inode, struct file *filep)
+{
+	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
+	host->usage_count--;
+	return 0;
+}
+
+/*
+ * Enqueuing and dequeuing functions for cmdlists.
+ */
+static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
+{
+	if (*Qptr == NULL) {
+		*Qptr = c;
+		c->next = c->prev = c;
+	} else {
+		c->prev = (*Qptr)->prev;
+		c->next = (*Qptr);
+		(*Qptr)->prev->next = c;
+		(*Qptr)->prev = c;
+	}
+}
+
+static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
+{
+	if (c && c->next != c) {
+		if (*Qptr == c) *Qptr = c->next;
+		c->prev->next = c->next;
+		c->next->prev = c->prev;
+	} else {
+		*Qptr = NULL;
+	}
+	return c;
+}
+
+/*
+ * Get a request and submit it to the controller.
+ * This routine needs to grab all the requests it possibly can from the
+ * req Q and submit them.  Interrupts are off (and need to be off) when you
+ * are in here (either via the dummy do_ida_request functions or by being
+ * called from the interrupt handler
+ */
+static void do_ida_request(request_queue_t *q)
+{
+	ctlr_info_t *h = q->queuedata;
+	cmdlist_t *c;
+	struct request *creq;
+	struct scatterlist tmp_sg[SG_MAX];
+	int i, dir, seg;
+
+	if (blk_queue_plugged(q))
+		goto startio;
+
+queue_next:
+	creq = elv_next_request(q);
+	if (!creq)
+		goto startio;
+
+	if (creq->nr_phys_segments > SG_MAX)
+		BUG();
+
+	if ((c = cmd_alloc(h,1)) == NULL)
+		goto startio;
+
+	blkdev_dequeue_request(creq);
+
+	c->ctlr = h->ctlr;
+	c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
+	c->hdr.size = sizeof(rblk_t) >> 2;
+	c->size += sizeof(rblk_t);
+
+	c->req.hdr.blk = creq->sector;
+	c->rq = creq;
+DBGPX(
+	printk("sector=%d, nr_sectors=%d\n", creq->sector, creq->nr_sectors);
+);
+	seg = blk_rq_map_sg(q, creq, tmp_sg);
+
+	/* Now do all the DMA Mappings */
+	if (rq_data_dir(creq) == READ)
+		dir = PCI_DMA_FROMDEVICE;
+	else
+		dir = PCI_DMA_TODEVICE;
+	for( i=0; i < seg; i++)
+	{
+		c->req.sg[i].size = tmp_sg[i].length;
+		c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
+						 tmp_sg[i].page,
+						 tmp_sg[i].offset,
+						 tmp_sg[i].length, dir);
+	}
+DBGPX(	printk("Submitting %d sectors in %d segments\n", creq->nr_sectors, seg); );
+	c->req.hdr.sg_cnt = seg;
+	c->req.hdr.blk_cnt = creq->nr_sectors;
+	c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
+	c->type = CMD_RWREQ;
+
+	/* Put the request on the tail of the request queue */
+	addQ(&h->reqQ, c);
+	h->Qdepth++;
+	if (h->Qdepth > h->maxQsinceinit) 
+		h->maxQsinceinit = h->Qdepth;
+
+	goto queue_next;
+
+startio:
+	start_io(h);
+}
+
+/* 
+ * start_io submits everything on a controller's request queue
+ * and moves it to the completion queue.
+ *
+ * Interrupts had better be off if you're in here
+ */
+static void start_io(ctlr_info_t *h)
+{
+	cmdlist_t *c;
+
+	while((c = h->reqQ) != NULL) {
+		/* Can't do anything if we're busy */
+		if (h->access.fifo_full(h) == 0)
+			return;
+
+		/* Get the first entry from the request Q */
+		removeQ(&h->reqQ, c);
+		h->Qdepth--;
+	
+		/* Tell the controller to do our bidding */
+		h->access.submit_command(h, c);
+
+		/* Get onto the completion Q */
+		addQ(&h->cmpQ, c);
+	}
+}
+
+static inline void complete_buffers(struct bio *bio, int ok)
+{
+	struct bio *xbh;
+	while(bio) {
+		int nr_sectors = bio_sectors(bio);
+
+		xbh = bio->bi_next;
+		bio->bi_next = NULL;
+		
+		blk_finished_io(nr_sectors);
+		bio_endio(bio, nr_sectors << 9, ok ? 0 : -EIO);
+
+		bio = xbh;
+	}
+}
+/*
+ * Mark all buffers that cmd was responsible for
+ */
+static inline void complete_command(cmdlist_t *cmd, int timeout)
+{
+	int ok=1;
+	int i, ddir;
+
+	if (cmd->req.hdr.rcode & RCODE_NONFATAL &&
+	   (hba[cmd->ctlr]->misc_tflags & MISC_NONFATAL_WARN) == 0) {
+		printk(KERN_NOTICE "Non Fatal error on ida/c%dd%d\n",
+				cmd->ctlr, cmd->hdr.unit);
+		hba[cmd->ctlr]->misc_tflags |= MISC_NONFATAL_WARN;
+	}
+	if (cmd->req.hdr.rcode & RCODE_FATAL) {
+		printk(KERN_WARNING "Fatal error on ida/c%dd%d\n",
+				cmd->ctlr, cmd->hdr.unit);
+		ok = 0;
+	}
+	if (cmd->req.hdr.rcode & RCODE_INVREQ) {
+				printk(KERN_WARNING "Invalid request on ida/c%dd%d = (cmd=%x sect=%d cnt=%d sg=%d ret=%x)\n",
+				cmd->ctlr, cmd->hdr.unit, cmd->req.hdr.cmd,
+				cmd->req.hdr.blk, cmd->req.hdr.blk_cnt,
+				cmd->req.hdr.sg_cnt, cmd->req.hdr.rcode);
+		ok = 0;	
+	}
+	if (timeout) ok = 0;
+	/* unmap the DMA mapping for all the scatter gather elements */
+	if (cmd->req.hdr.cmd == IDA_READ)
+		ddir = PCI_DMA_FROMDEVICE;
+	else
+		ddir = PCI_DMA_TODEVICE;
+        for(i=0; i<cmd->req.hdr.sg_cnt; i++)
+                pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
+				cmd->req.sg[i].size, ddir);
+
+	complete_buffers(cmd->rq->bio, ok);
+
+        DBGPX(printk("Done with %p\n", cmd->rq););
+	end_that_request_last(cmd->rq);
+}
+
+/*
+ *  The controller will interrupt us upon completion of commands.
+ *  Find the command on the completion queue, remove it, tell the OS and
+ *  try to queue up more IO
+ */
+static irqreturn_t do_ida_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+	ctlr_info_t *h = dev_id;
+	cmdlist_t *c;
+	unsigned long istat;
+	unsigned long flags;
+	__u32 a,a1;
+
+	istat = h->access.intr_pending(h);
+	/* Is this interrupt for us? */
+	if (istat == 0)
+		return IRQ_NONE;
+
+	/*
+	 * If there are completed commands in the completion queue,
+	 * we had better do something about it.
+	 */
+	spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
+	if (istat & FIFO_NOT_EMPTY) {
+		while((a = h->access.command_completed(h))) {
+			a1 = a; a &= ~3;
+			if ((c = h->cmpQ) == NULL)
+			{  
+				printk(KERN_WARNING "cpqarray: Completion of %08lx ignored\n", (unsigned long)a1);
+				continue;	
+			} 
+			while(c->busaddr != a) {
+				c = c->next;
+				if (c == h->cmpQ) 
+					break;
+			}
+			/*
+			 * If we've found the command, take it off the
+			 * completion Q and free it
+			 */
+			if (c->busaddr == a) {
+				removeQ(&h->cmpQ, c);
+				/*  Check for invalid command.
+                                 *  Controller returns command error,
+                                 *  But rcode = 0.
+                                 */
+
+				if((a1 & 0x03) && (c->req.hdr.rcode == 0))
+                                {
+                                	c->req.hdr.rcode = RCODE_INVREQ;
+                                }
+				if (c->type == CMD_RWREQ) {
+					complete_command(c, 0);
+					cmd_free(h, c, 1);
+				} else if (c->type == CMD_IOCTL_PEND) {
+					c->type = CMD_IOCTL_DONE;
+				}
+				continue;
+			}
+		}
+	}
+
+	/*
+	 * See if we can queue up some more IO
+	 */
+	do_ida_request(h->queue);
+	spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags); 
+	return IRQ_HANDLED;
+}
+
+/*
+ * This timer was for timing out requests that haven't happened after
+ * IDA_TIMEOUT.  That wasn't such a good idea.  This timer is used to
+ * reset a flags structure so we don't flood the user with
+ * "Non-Fatal error" messages.
+ */
+static void ida_timer(unsigned long tdata)
+{
+	ctlr_info_t *h = (ctlr_info_t*)tdata;
+
+	h->timer.expires = jiffies + IDA_TIMER;
+	add_timer(&h->timer);
+	h->misc_tflags = 0;
+}
+
+/*
+ *  ida_ioctl does some miscellaneous stuff like reporting drive geometry,
+ *  setting readahead and submitting commands from userspace to the controller.
+ */
+static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg)
+{
+	drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
+	ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
+	int error;
+	int diskinfo[4];
+	struct hd_geometry __user *geo = (struct hd_geometry __user *)arg;
+	ida_ioctl_t __user *io = (ida_ioctl_t __user *)arg;
+	ida_ioctl_t *my_io;
+
+	switch(cmd) {
+	case HDIO_GETGEO:
+		if (drv->cylinders) {
+			diskinfo[0] = drv->heads;
+			diskinfo[1] = drv->sectors;
+			diskinfo[2] = drv->cylinders;
+		} else {
+			diskinfo[0] = 0xff;
+			diskinfo[1] = 0x3f;
+			diskinfo[2] = drv->nr_blks / (0xff*0x3f);
+		}
+		put_user(diskinfo[0], &geo->heads);
+		put_user(diskinfo[1], &geo->sectors);
+		put_user(diskinfo[2], &geo->cylinders);
+		put_user(get_start_sect(inode->i_bdev), &geo->start);
+		return 0;
+	case IDAGETDRVINFO:
+		if (copy_to_user(&io->c.drv, drv, sizeof(drv_info_t)))
+			return -EFAULT;
+		return 0;
+	case IDAPASSTHRU:
+		if (!capable(CAP_SYS_RAWIO))
+			return -EPERM;
+		my_io = kmalloc(sizeof(ida_ioctl_t), GFP_KERNEL);
+		if (!my_io)
+			return -ENOMEM;
+		error = -EFAULT;
+		if (copy_from_user(my_io, io, sizeof(*my_io)))
+			goto out_passthru;
+		error = ida_ctlr_ioctl(host, drv - host->drv, my_io);
+		if (error)
+			goto out_passthru;
+		error = -EFAULT;
+		if (copy_to_user(io, my_io, sizeof(*my_io)))
+			goto out_passthru;
+		error = 0;
+out_passthru:
+		kfree(my_io);
+		return error;
+	case IDAGETCTLRSIG:
+		if (!arg) return -EINVAL;
+		put_user(host->ctlr_sig, (int __user *)arg);
+		return 0;
+	case IDAREVALIDATEVOLS:
+		if (iminor(inode) != 0)
+			return -ENXIO;
+		return revalidate_allvol(host);
+	case IDADRIVERVERSION:
+		if (!arg) return -EINVAL;
+		put_user(DRIVER_VERSION, (unsigned long __user *)arg);
+		return 0;
+	case IDAGETPCIINFO:
+	{
+		
+		ida_pci_info_struct pciinfo;
+
+		if (!arg) return -EINVAL;
+		pciinfo.bus = host->pci_dev->bus->number;
+		pciinfo.dev_fn = host->pci_dev->devfn;
+		pciinfo.board_id = host->board_id;
+		if(copy_to_user((void __user *) arg, &pciinfo,  
+			sizeof( ida_pci_info_struct)))
+				return -EFAULT;
+		return(0);
+	}	
+
+	default:
+		return -EINVAL;
+	}
+		
+}
+/*
+ * ida_ctlr_ioctl is for passing commands to the controller from userspace.
+ * The command block (io) has already been copied to kernel space for us,
+ * however, any elements in the sglist need to be copied to kernel space
+ * or copied back to userspace.
+ *
+ * Only root may perform a controller passthru command, however I'm not doing
+ * any serious sanity checking on the arguments.  Doing an IDA_WRITE_MEDIA and
+ * putting a 64M buffer in the sglist is probably a *bad* idea.
+ */
+static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
+{
+	int ctlr = h->ctlr;
+	cmdlist_t *c;
+	void *p = NULL;
+	unsigned long flags;
+	int error;
+
+	if ((c = cmd_alloc(h, 0)) == NULL)
+		return -ENOMEM;
+	c->ctlr = ctlr;
+	c->hdr.unit = (io->unit & UNITVALID) ? (io->unit & ~UNITVALID) : dsk;
+	c->hdr.size = sizeof(rblk_t) >> 2;
+	c->size += sizeof(rblk_t);
+
+	c->req.hdr.cmd = io->cmd;
+	c->req.hdr.blk = io->blk;
+	c->req.hdr.blk_cnt = io->blk_cnt;
+	c->type = CMD_IOCTL_PEND;
+
+	/* Pre submit processing */
+	switch(io->cmd) {
+	case PASSTHRU_A:
+		p = kmalloc(io->sg[0].size, GFP_KERNEL);
+		if (!p) 
+		{ 
+			error = -ENOMEM; 
+			cmd_free(h, c, 0); 
+			return(error);
+		}
+		if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
+			kfree(p);
+			cmd_free(h, c, 0); 
+			return -EFAULT;
+		}
+		c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c), 
+				sizeof(ida_ioctl_t), 
+				PCI_DMA_BIDIRECTIONAL);
+		c->req.sg[0].size = io->sg[0].size;
+		c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
+			c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
+		c->req.hdr.sg_cnt = 1;
+		break;
+	case IDA_READ:
+	case READ_FLASH_ROM:
+	case SENSE_CONTROLLER_PERFORMANCE:
+		p = kmalloc(io->sg[0].size, GFP_KERNEL);
+		if (!p) 
+		{ 
+                        error = -ENOMEM; 
+                        cmd_free(h, c, 0);
+                        return(error);
+                }
+
+		c->req.sg[0].size = io->sg[0].size;
+		c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
+			c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL); 
+		c->req.hdr.sg_cnt = 1;
+		break;
+	case IDA_WRITE:
+	case IDA_WRITE_MEDIA:
+	case DIAG_PASS_THRU:
+	case COLLECT_BUFFER:
+	case WRITE_FLASH_ROM:
+		p = kmalloc(io->sg[0].size, GFP_KERNEL);
+		if (!p) 
+ 		{ 
+                        error = -ENOMEM; 
+                        cmd_free(h, c, 0);
+                        return(error);
+                }
+		if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
+			kfree(p);
+                        cmd_free(h, c, 0);
+			return -EFAULT;
+		}
+		c->req.sg[0].size = io->sg[0].size;
+		c->req.sg[0].addr = pci_map_single(h->pci_dev, p, 
+			c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL); 
+		c->req.hdr.sg_cnt = 1;
+		break;
+	default:
+		c->req.sg[0].size = sizeof(io->c);
+		c->req.sg[0].addr = pci_map_single(h->pci_dev,&io->c, 
+			c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
+		c->req.hdr.sg_cnt = 1;
+	}
+	
+	/* Put the request on the tail of the request queue */
+	spin_lock_irqsave(IDA_LOCK(ctlr), flags);
+	addQ(&h->reqQ, c);
+	h->Qdepth++;
+	start_io(h);
+	spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
+
+	/* Wait for completion */
+	while(c->type != CMD_IOCTL_DONE)
+		schedule();
+
+	/* Unmap the DMA  */
+	pci_unmap_single(h->pci_dev, c->req.sg[0].addr, c->req.sg[0].size, 
+		PCI_DMA_BIDIRECTIONAL);
+	/* Post submit processing */
+	switch(io->cmd) {
+	case PASSTHRU_A:
+		pci_unmap_single(h->pci_dev, c->req.hdr.blk,
+                                sizeof(ida_ioctl_t),
+                                PCI_DMA_BIDIRECTIONAL);
+	case IDA_READ:
+	case DIAG_PASS_THRU:
+	case SENSE_CONTROLLER_PERFORMANCE:
+	case READ_FLASH_ROM:
+		if (copy_to_user(io->sg[0].addr, p, io->sg[0].size)) {
+			kfree(p);
+			return -EFAULT;
+		}
+		/* fall through and free p */
+	case IDA_WRITE:
+	case IDA_WRITE_MEDIA:
+	case COLLECT_BUFFER:
+	case WRITE_FLASH_ROM:
+		kfree(p);
+		break;
+	default:;
+		/* Nothing to do */
+	}
+
+	io->rcode = c->req.hdr.rcode;
+	cmd_free(h, c, 0);
+	return(0);
+}
+
+/*
+ * Commands are pre-allocated in a large block.  Here we use a simple bitmap
+ * scheme to suballocte them to the driver.  Operations that are not time
+ * critical (and can wait for kmalloc and possibly sleep) can pass in NULL
+ * as the first argument to get a new command.
+ */
+static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool)
+{
+	cmdlist_t * c;
+	int i;
+	dma_addr_t cmd_dhandle;
+
+	if (!get_from_pool) {
+		c = (cmdlist_t*)pci_alloc_consistent(h->pci_dev, 
+			sizeof(cmdlist_t), &cmd_dhandle);
+		if(c==NULL)
+			return NULL;
+	} else {
+		do {
+			i = find_first_zero_bit(h->cmd_pool_bits, NR_CMDS);
+			if (i == NR_CMDS)
+				return NULL;
+		} while(test_and_set_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG)) != 0);
+		c = h->cmd_pool + i;
+		cmd_dhandle = h->cmd_pool_dhandle + i*sizeof(cmdlist_t);
+		h->nr_allocs++;
+	}
+
+	memset(c, 0, sizeof(cmdlist_t));
+	c->busaddr = cmd_dhandle; 
+	return c;
+}
+
+static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool)
+{
+	int i;
+
+	if (!got_from_pool) {
+		pci_free_consistent(h->pci_dev, sizeof(cmdlist_t), c,
+			c->busaddr);
+	} else {
+		i = c - h->cmd_pool;
+		clear_bit(i&(BITS_PER_LONG-1), h->cmd_pool_bits+(i/BITS_PER_LONG));
+		h->nr_frees++;
+	}
+}
+
+/***********************************************************************
+    name:        sendcmd
+    Send a command to an IDA using the memory mapped FIFO interface
+    and wait for it to complete.  
+    This routine should only be called at init time.
+***********************************************************************/
+static int sendcmd(
+	__u8	cmd,
+	int	ctlr,
+	void	*buff,
+	size_t	size,
+	unsigned int blk,
+	unsigned int blkcnt,
+	unsigned int log_unit )
+{
+	cmdlist_t *c;
+	int complete;
+	unsigned long temp;
+	unsigned long i;
+	ctlr_info_t *info_p = hba[ctlr];
+
+	c = cmd_alloc(info_p, 1);
+	if(!c)
+		return IO_ERROR;
+	c->ctlr = ctlr;
+	c->hdr.unit = log_unit;
+	c->hdr.prio = 0;
+	c->hdr.size = sizeof(rblk_t) >> 2;
+	c->size += sizeof(rblk_t);
+
+	/* The request information. */
+	c->req.hdr.next = 0;
+	c->req.hdr.rcode = 0;
+	c->req.bp = 0;
+	c->req.hdr.sg_cnt = 1;
+	c->req.hdr.reserved = 0;
+	
+	if (size == 0)
+		c->req.sg[0].size = 512;
+	else
+		c->req.sg[0].size = size;
+
+	c->req.hdr.blk = blk;
+	c->req.hdr.blk_cnt = blkcnt;
+	c->req.hdr.cmd = (unsigned char) cmd;
+	c->req.sg[0].addr = (__u32) pci_map_single(info_p->pci_dev, 
+		buff, c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
+	/*
+	 * Disable interrupt
+	 */
+	info_p->access.set_intr_mask(info_p, 0);
+	/* Make sure there is room in the command FIFO */
+	/* Actually it should be completely empty at this time. */
+	for (i = 200000; i > 0; i--) {
+		temp = info_p->access.fifo_full(info_p);
+		if (temp != 0) {
+			break;
+		}
+		udelay(10);
+DBG(
+		printk(KERN_WARNING "cpqarray ida%d: idaSendPciCmd FIFO full,"
+			" waiting!\n", ctlr);
+);
+	} 
+	/*
+	 * Send the cmd
+	 */
+	info_p->access.submit_command(info_p, c);
+	complete = pollcomplete(ctlr);
+	
+	pci_unmap_single(info_p->pci_dev, (dma_addr_t) c->req.sg[0].addr, 
+		c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
+	if (complete != 1) {
+		if (complete != c->busaddr) {
+			printk( KERN_WARNING
+			"cpqarray ida%d: idaSendPciCmd "
+		      "Invalid command list address returned! (%08lx)\n",
+				ctlr, (unsigned long)complete);
+			cmd_free(info_p, c, 1);
+			return (IO_ERROR);
+		}
+	} else {
+		printk( KERN_WARNING
+			"cpqarray ida%d: idaSendPciCmd Timeout out, "
+			"No command list address returned!\n",
+			ctlr);
+		cmd_free(info_p, c, 1);
+		return (IO_ERROR);
+	}
+
+	if (c->req.hdr.rcode & 0x00FE) {
+		if (!(c->req.hdr.rcode & BIG_PROBLEM)) {
+			printk( KERN_WARNING
+			"cpqarray ida%d: idaSendPciCmd, error: "
+				"Controller failed at init time "
+				"cmd: 0x%x, return code = 0x%x\n",
+				ctlr, c->req.hdr.cmd, c->req.hdr.rcode);
+
+			cmd_free(info_p, c, 1);
+			return (IO_ERROR);
+		}
+	}
+	cmd_free(info_p, c, 1);
+	return (IO_OK);
+}
+
+/*
+ * revalidate_allvol is for online array config utilities.  After a
+ * utility reconfigures the drives in the array, it can use this function
+ * (through an ioctl) to make the driver zap any previous disk structs for
+ * that controller and get new ones.
+ *
+ * Right now I'm using the getgeometry() function to do this, but this
+ * function should probably be finer grained and allow you to revalidate one
+ * particualar logical volume (instead of all of them on a particular
+ * controller).
+ */
+static int revalidate_allvol(ctlr_info_t *host)
+{
+	int ctlr = host->ctlr;
+	int i;
+	unsigned long flags;
+
+	spin_lock_irqsave(IDA_LOCK(ctlr), flags);
+	if (host->usage_count > 1) {
+		spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
+		printk(KERN_WARNING "cpqarray: Device busy for volume"
+			" revalidation (usage=%d)\n", host->usage_count);
+		return -EBUSY;
+	}
+	host->usage_count++;
+	spin_unlock_irqrestore(IDA_LOCK(ctlr), flags);
+
+	/*
+	 * Set the partition and block size structures for all volumes
+	 * on this controller to zero.  We will reread all of this data
+	 */
+	set_capacity(ida_gendisk[ctlr][0], 0);
+	for (i = 1; i < NWD; i++) {
+		struct gendisk *disk = ida_gendisk[ctlr][i];
+		if (disk->flags & GENHD_FL_UP)
+			del_gendisk(disk);
+	}
+	memset(host->drv, 0, sizeof(drv_info_t)*NWD);
+
+	/*
+	 * Tell the array controller not to give us any interrupts while
+	 * we check the new geometry.  Then turn interrupts back on when
+	 * we're done.
+	 */
+	host->access.set_intr_mask(host, 0);
+	getgeometry(ctlr);
+	host->access.set_intr_mask(host, FIFO_NOT_EMPTY);
+
+	for(i=0; i<NWD; i++) {
+		struct gendisk *disk = ida_gendisk[ctlr][i];
+		drv_info_t *drv = &host->drv[i];
+		if (i && !drv->nr_blks)
+			continue;
+		blk_queue_hardsect_size(host->queue, drv->blk_size);
+		set_capacity(disk, drv->nr_blks);
+		disk->queue = host->queue;
+		disk->private_data = drv;
+		if (i)
+			add_disk(disk);
+	}
+
+	host->usage_count--;
+	return 0;
+}
+
+static int ida_revalidate(struct gendisk *disk)
+{
+	drv_info_t *drv = disk->private_data;
+	set_capacity(disk, drv->nr_blks);
+	return 0;
+}
+
+/********************************************************************
+    name: pollcomplete
+    Wait polling for a command to complete.
+    The memory mapped FIFO is polled for the completion.
+    Used only at init time, interrupts disabled.
+ ********************************************************************/
+static int pollcomplete(int ctlr)
+{
+	int done;
+	int i;
+
+	/* Wait (up to 2 seconds) for a command to complete */
+
+	for (i = 200000; i > 0; i--) {
+		done = hba[ctlr]->access.command_completed(hba[ctlr]);
+		if (done == 0) {
+			udelay(10);	/* a short fixed delay */
+		} else
+			return (done);
+	}
+	/* Invalid address to tell caller we ran out of time */
+	return 1;
+}
+/*****************************************************************
+    start_fwbk
+    Starts controller firmwares background processing. 
+    Currently only the Integrated Raid controller needs this done.
+    If the PCI mem address registers are written to after this, 
+	 data corruption may occur
+*****************************************************************/
+static void start_fwbk(int ctlr)
+{
+		id_ctlr_t *id_ctlr_buf; 
+	int ret_code;
+
+	if(	(hba[ctlr]->board_id != 0x40400E11)
+		&& (hba[ctlr]->board_id != 0x40480E11) )
+
+	/* Not a Integrated Raid, so there is nothing for us to do */
+		return;
+	printk(KERN_DEBUG "cpqarray: Starting firmware's background"
+		" processing\n");
+	/* Command does not return anything, but idasend command needs a 
+		buffer */
+	id_ctlr_buf = (id_ctlr_t *)kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
+	if(id_ctlr_buf==NULL)
+	{
+		printk(KERN_WARNING "cpqarray: Out of memory. "
+			"Unable to start background processing.\n");
+		return;
+	}		
+	ret_code = sendcmd(RESUME_BACKGROUND_ACTIVITY, ctlr, 
+		id_ctlr_buf, 0, 0, 0, 0);
+	if(ret_code != IO_OK)
+		printk(KERN_WARNING "cpqarray: Unable to start"
+			" background processing\n");
+
+	kfree(id_ctlr_buf);
+}
+/*****************************************************************
+    getgeometry
+    Get ida logical volume geometry from the controller 
+    This is a large bit of code which once existed in two flavors,
+    It is used only at init time.
+*****************************************************************/
+static void getgeometry(int ctlr)
+{				
+	id_log_drv_t *id_ldrive;
+	id_ctlr_t *id_ctlr_buf;
+	sense_log_drv_stat_t *id_lstatus_buf;
+	config_t *sense_config_buf;
+	unsigned int log_unit, log_index;
+	int ret_code, size;
+	drv_info_t *drv;
+	ctlr_info_t *info_p = hba[ctlr];
+	int i;
+
+	info_p->log_drv_map = 0;	
+	
+	id_ldrive = (id_log_drv_t *)kmalloc(sizeof(id_log_drv_t), GFP_KERNEL);
+	if(id_ldrive == NULL)
+	{
+		printk( KERN_ERR "cpqarray:  out of memory.\n");
+		return;
+	}
+
+	id_ctlr_buf = (id_ctlr_t *)kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
+	if(id_ctlr_buf == NULL)
+	{
+		kfree(id_ldrive);
+		printk( KERN_ERR "cpqarray:  out of memory.\n");
+		return;
+	}
+
+	id_lstatus_buf = (sense_log_drv_stat_t *)kmalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
+	if(id_lstatus_buf == NULL)
+	{
+		kfree(id_ctlr_buf);
+		kfree(id_ldrive);
+		printk( KERN_ERR "cpqarray:  out of memory.\n");
+		return;
+	}
+
+	sense_config_buf = (config_t *)kmalloc(sizeof(config_t), GFP_KERNEL);
+	if(sense_config_buf == NULL)
+	{
+		kfree(id_lstatus_buf);
+		kfree(id_ctlr_buf);
+		kfree(id_ldrive);
+		printk( KERN_ERR "cpqarray:  out of memory.\n");
+		return;
+	}
+
+	memset(id_ldrive, 0, sizeof(id_log_drv_t));
+	memset(id_ctlr_buf, 0, sizeof(id_ctlr_t));
+	memset(id_lstatus_buf, 0, sizeof(sense_log_drv_stat_t));
+	memset(sense_config_buf, 0, sizeof(config_t));
+
+	info_p->phys_drives = 0;
+	info_p->log_drv_map = 0;
+	info_p->drv_assign_map = 0;
+	info_p->drv_spare_map = 0;
+	info_p->mp_failed_drv_map = 0;	/* only initialized here */
+	/* Get controllers info for this logical drive */
+	ret_code = sendcmd(ID_CTLR, ctlr, id_ctlr_buf, 0, 0, 0, 0);
+	if (ret_code == IO_ERROR) {
+		/*
+		 * If can't get controller info, set the logical drive map to 0,
+		 * so the idastubopen will fail on all logical drives
+		 * on the controller.
+		 */
+		 /* Free all the buffers and return */ 
+		printk(KERN_ERR "cpqarray: error sending ID controller\n");
+		kfree(sense_config_buf);
+                kfree(id_lstatus_buf);
+                kfree(id_ctlr_buf);
+                kfree(id_ldrive);
+                return;
+        }
+
+	info_p->log_drives = id_ctlr_buf->nr_drvs;
+	for(i=0;i<4;i++)
+		info_p->firm_rev[i] = id_ctlr_buf->firm_rev[i];
+	info_p->ctlr_sig = id_ctlr_buf->cfg_sig;
+
+	printk(" (%s)\n", info_p->product_name);
+	/*
+	 * Initialize logical drive map to zero
+	 */
+	log_index = 0;
+	/*
+	 * Get drive geometry for all logical drives
+	 */
+	if (id_ctlr_buf->nr_drvs > 16)
+		printk(KERN_WARNING "cpqarray ida%d:  This driver supports "
+			"16 logical drives per controller.\n.  "
+			" Additional drives will not be "
+			"detected\n", ctlr);
+
+	for (log_unit = 0;
+	     (log_index < id_ctlr_buf->nr_drvs)
+	     && (log_unit < NWD);
+	     log_unit++) {
+		struct gendisk *disk = ida_gendisk[ctlr][log_unit];
+
+		size = sizeof(sense_log_drv_stat_t);
+
+		/*
+		   Send "Identify logical drive status" cmd
+		 */
+		ret_code = sendcmd(SENSE_LOG_DRV_STAT,
+			     ctlr, id_lstatus_buf, size, 0, 0, log_unit);
+		if (ret_code == IO_ERROR) {
+			/*
+			   If can't get logical drive status, set
+			   the logical drive map to 0, so the
+			   idastubopen will fail for all logical drives
+			   on the controller. 
+			 */
+			info_p->log_drv_map = 0;	
+			printk( KERN_WARNING
+			     "cpqarray ida%d: idaGetGeometry - Controller"
+				" failed to report status of logical drive %d\n"
+			 "Access to this controller has been disabled\n",
+				ctlr, log_unit);
+			/* Free all the buffers and return */
+                	kfree(sense_config_buf);
+                	kfree(id_lstatus_buf);
+                	kfree(id_ctlr_buf);
+                	kfree(id_ldrive);
+                	return;
+		}
+		/*
+		   Make sure the logical drive is configured
+		 */
+		if (id_lstatus_buf->status != LOG_NOT_CONF) {
+			ret_code = sendcmd(ID_LOG_DRV, ctlr, id_ldrive,
+			       sizeof(id_log_drv_t), 0, 0, log_unit);
+			/*
+			   If error, the bit for this
+			   logical drive won't be set and
+			   idastubopen will return error. 
+			 */
+			if (ret_code != IO_ERROR) {
+				drv = &info_p->drv[log_unit];
+				drv->blk_size = id_ldrive->blk_size;
+				drv->nr_blks = id_ldrive->nr_blks;
+				drv->cylinders = id_ldrive->drv.cyl;
+				drv->heads = id_ldrive->drv.heads;
+				drv->sectors = id_ldrive->drv.sect_per_track;
+				info_p->log_drv_map |=	(1 << log_unit);
+
+	printk(KERN_INFO "cpqarray ida/c%dd%d: blksz=%d nr_blks=%d\n",
+		ctlr, log_unit, drv->blk_size, drv->nr_blks);
+				ret_code = sendcmd(SENSE_CONFIG,
+						  ctlr, sense_config_buf,
+				 sizeof(config_t), 0, 0, log_unit);
+				if (ret_code == IO_ERROR) {
+					info_p->log_drv_map = 0;
+					/* Free all the buffers and return */
+                			printk(KERN_ERR "cpqarray: error sending sense config\n");
+                			kfree(sense_config_buf);
+                			kfree(id_lstatus_buf);
+                			kfree(id_ctlr_buf);
+                			kfree(id_ldrive);
+                			return;
+
+				}
+
+				sprintf(disk->devfs_name, "ida/c%dd%d", ctlr, log_unit);
+
+				info_p->phys_drives =
+				    sense_config_buf->ctlr_phys_drv;
+				info_p->drv_assign_map
+				    |= sense_config_buf->drv_asgn_map;
+				info_p->drv_assign_map
+				    |= sense_config_buf->spare_asgn_map;
+				info_p->drv_spare_map
+				    |= sense_config_buf->spare_asgn_map;
+			}	/* end of if no error on id_ldrive */
+			log_index = log_index + 1;
+		}		/* end of if logical drive configured */
+	}			/* end of for log_unit */
+	kfree(sense_config_buf);
+  	kfree(id_ldrive);
+  	kfree(id_lstatus_buf);
+	kfree(id_ctlr_buf);
+	return;
+
+}
+
+static void __exit cpqarray_exit(void)
+{
+	int i;
+
+	pci_unregister_driver(&cpqarray_pci_driver);
+
+	/* Double check that all controller entries have been removed */
+	for(i=0; i<MAX_CTLR; i++) {
+		if (hba[i] != NULL) {
+			printk(KERN_WARNING "cpqarray: Removing EISA "
+					"controller %d\n", i);
+			cpqarray_remove_one_eisa(i);
+		}
+	}
+
+	devfs_remove("ida");
+	remove_proc_entry("cpqarray", proc_root_driver);
+}
+
+module_init(cpqarray_init)
+module_exit(cpqarray_exit)