Staging: VME Framework for the Linux Kernel

This framework aims to colelese, extend and improve the VME Linux
drivers found at vmelinux.org, universe2.sourceforge.net and
openfmi.net/frs/?group_id=144. The last 2 drivers appear to be forks of
the original code found at vmelinux.org though have extended the
codebase.
Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -137,5 +137,7 @@ source "drivers/staging/udlfb/Kconfig"
 
 source "drivers/staging/hv/Kconfig"
 
+source "drivers/staging/vme/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING

drivers/staging/Makefile

@@ -50,3 +50,4 @@ obj-$(CONFIG_USB_CPC)		+= cpc-usb/
 obj-$(CONFIG_RDC_17F3101X)	+= pata_rdc/
 obj-$(CONFIG_FB_UDL)		+= udlfb/
 obj-$(CONFIG_HYPERV)		+= hv/
+obj-$(CONFIG_VME)		+= vme/

drivers/staging/vme/Kconfig

+#
+# VME configuration.
+#
+
+menuconfig VME
+	tristate "VME bridge support"
+	depends on PCI
+	---help---
+	  If you say Y here you get support for the VME bridge Framework.
+
+if VME
+
+#source "drivers/staging/vme/bridges/Kconfig"
+#
+#source "drivers/staging/vme/devices/Kconfig"
+
+endif # VME

drivers/staging/vme/Makefile

+#
+# Makefile for the VME bridge device drivers.
+#
+obj-$(CONFIG_VME)		+= vme.o
+
+#obj-y				+= bridges/
+#obj-y				+= devices/

drivers/staging/vme/vme.c

+/*
+ * VME Bridge Framework
+ *
+ * Author: Martyn Welch <martyn.welch@gefanuc.com>
+ * Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc.
+ *
+ * Based on work by Tom Armistead and Ajit Prem
+ * Copyright 2004 Motorola Inc.
+ *
+ * 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.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/highmem.h>
+#include <linux/interrupt.h>
+#include <linux/pagemap.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/syscalls.h>
+#include <linux/semaphore.h>
+#include <linux/spinlock.h>
+
+#include "vme.h"
+#include "vme_bridge.h"
+
+/* Bitmask and semaphore to keep track of bridge numbers */
+static unsigned int vme_bus_numbers;
+DECLARE_MUTEX(vme_bus_num_sem);
+
+static void __exit vme_exit (void);
+static int __init vme_init (void);
+
+
+/*
+ * Find the bridge resource associated with a specific device resource
+ */
+static struct vme_bridge *dev_to_bridge(struct device *dev)
+{
+	return dev->platform_data;
+}
+
+/*
+ * Find the bridge that the resource is associated with.
+ */
+static struct vme_bridge *find_bridge(struct vme_resource *resource)
+{
+	/* Get list to search */
+	switch (resource->type) {
+	case VME_MASTER:
+		return list_entry(resource->entry, struct vme_master_resource,
+			list)->parent;
+		break;
+	case VME_SLAVE:
+		return list_entry(resource->entry, struct vme_slave_resource,
+			list)->parent;
+		break;
+	case VME_DMA:
+		return list_entry(resource->entry, struct vme_dma_resource,
+			list)->parent;
+		break;
+	default:
+		printk(KERN_ERR "Unknown resource type\n");
+		return NULL;
+		break;
+	}
+}
+
+/*
+ * Allocate a contiguous block of memory for use by the driver. This is used to
+ * create the buffers for the slave windows.
+ *
+ * XXX VME bridges could be available on buses other than PCI. At the momment
+ *     this framework only supports PCI devices.
+ */
+void * vme_alloc_consistent(struct vme_resource *resource, size_t size,
+	dma_addr_t *dma)
+{
+	struct vme_bridge *bridge;
+	struct pci_dev *pdev;
+
+	if(resource == NULL) {
+		printk("No resource\n");
+		return NULL;
+	}
+
+	bridge = find_bridge(resource);
+	if(bridge == NULL) {
+		printk("Can't find bridge\n");
+		return NULL;
+	}
+
+	/* Find pci_dev container of dev */
+	if (bridge->parent == NULL) {
+		printk("Dev entry NULL\n");
+		return NULL;
+	}
+	pdev = container_of(bridge->parent, struct pci_dev, dev);
+
+	return pci_alloc_consistent(pdev, size, dma);
+}
+EXPORT_SYMBOL(vme_alloc_consistent);
+
+/*
+ * Free previously allocated contiguous block of memory.
+ *
+ * XXX VME bridges could be available on buses other than PCI. At the momment
+ *     this framework only supports PCI devices.
+ */
+void vme_free_consistent(struct vme_resource *resource, size_t size,
+	void *vaddr, dma_addr_t dma)
+{
+	struct vme_bridge *bridge;
+	struct pci_dev *pdev;
+
+	if(resource == NULL) {
+		printk("No resource\n");
+		return;
+	}
+
+	bridge = find_bridge(resource);
+	if(bridge == NULL) {
+		printk("Can't find bridge\n");
+		return;
+	}
+
+	/* Find pci_dev container of dev */
+	pdev = container_of(bridge->parent, struct pci_dev, dev);
+
+	pci_free_consistent(pdev, size, vaddr, dma);
+}
+EXPORT_SYMBOL(vme_free_consistent);
+
+size_t vme_get_size(struct vme_resource *resource)
+{
+	int enabled, retval;
+	unsigned long long base, size;
+	dma_addr_t buf_base;
+	vme_address_t aspace;
+	vme_cycle_t cycle;
+	vme_width_t dwidth;
+
+	switch (resource->type) {
+	case VME_MASTER:
+		retval = vme_master_get(resource, &enabled, &base, &size,
+			&aspace, &cycle, &dwidth);
+
+		return size;
+		break;
+	case VME_SLAVE:
+		retval = vme_slave_get(resource, &enabled, &base, &size,
+			&buf_base, &aspace, &cycle);
+
+		return size;
+		break;
+	case VME_DMA:
+		return 0;
+		break;
+	default:
+		printk(KERN_ERR "Unknown resource type\n");
+		return 0;
+		break;
+	}
+}
+EXPORT_SYMBOL(vme_get_size);
+
+static int vme_check_window(vme_address_t aspace, unsigned long long vme_base,
+	unsigned long long size)
+{
+	int retval = 0;
+
+	switch (aspace) {
+	case VME_A16:
+		if (((vme_base + size) > VME_A16_MAX) ||
+				(vme_base > VME_A16_MAX))
+			retval = -EFAULT;
+		break;
+	case VME_A24:
+		if (((vme_base + size) > VME_A24_MAX) ||
+				(vme_base > VME_A24_MAX))
+			retval = -EFAULT;
+		break;
+	case VME_A32:
+		if (((vme_base + size) > VME_A32_MAX) ||
+				(vme_base > VME_A32_MAX))
+			retval = -EFAULT;
+		break;
+	case VME_A64:
+		/*
+		 * Any value held in an unsigned long long can be used as the
+		 * base
+		 */
+		break;
+	case VME_CRCSR:
+		if (((vme_base + size) > VME_CRCSR_MAX) ||
+				(vme_base > VME_CRCSR_MAX))
+			retval = -EFAULT;
+		break;
+	case VME_USER1:
+	case VME_USER2:
+	case VME_USER3:
+	case VME_USER4:
+		/* User Defined */
+		break;
+	default:
+		printk("Invalid address space\n");
+		retval = -EINVAL;
+		break;
+	}
+
+	return retval;
+}
+
+/*
+ * Request a slave image with specific attributes, return some unique
+ * identifier.
+ */
+struct vme_resource * vme_slave_request(struct device *dev,
+	vme_address_t address, vme_cycle_t cycle)
+{
+	struct vme_bridge *bridge;
+	struct list_head *slave_pos = NULL;
+	struct vme_slave_resource *allocated_image = NULL;
+	struct vme_slave_resource *slave_image = NULL;
+	struct vme_resource *resource = NULL;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		goto err_bus;
+	}
+
+	/* Loop through slave resources */
+	list_for_each(slave_pos, &(bridge->slave_resources)) {
+		slave_image = list_entry(slave_pos,
+			struct vme_slave_resource, list);
+
+		if (slave_image == NULL) {
+			printk("Registered NULL Slave resource\n");
+			continue;
+		}
+
+		/* Find an unlocked and compatible image */
+		down(&(slave_image->sem));
+		if(((slave_image->address_attr & address) == address) &&
+			((slave_image->cycle_attr & cycle) == cycle) &&
+			(slave_image->locked == 0)) {
+
+			slave_image->locked = 1;
+			up(&(slave_image->sem));
+			allocated_image = slave_image;
+			break;
+		}
+		up(&(slave_image->sem));
+	}
+
+	/* No free image */
+	if (allocated_image == NULL)
+		goto err_image;
+
+	resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
+	if (resource == NULL) {
+		printk(KERN_WARNING "Unable to allocate resource structure\n");
+		goto err_alloc;
+	}
+	resource->type = VME_SLAVE;
+	resource->entry = &(allocated_image->list);
+
+	return resource;
+
+err_alloc:
+	/* Unlock image */
+	down(&(slave_image->sem));
+	slave_image->locked = 0;
+	up(&(slave_image->sem));
+err_image:
+err_bus:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_slave_request);
+
+int vme_slave_set (struct vme_resource *resource, int enabled,
+	unsigned long long vme_base, unsigned long long size,
+	dma_addr_t buf_base, vme_address_t aspace, vme_cycle_t cycle)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_slave_resource *image;
+	int retval;
+
+	if (resource->type != VME_SLAVE) {
+		printk("Not a slave resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_slave_resource, list);
+
+	if (bridge->slave_set == NULL) {
+		printk("Function not supported\n");
+		return -ENOSYS;
+	}
+
+	if(!(((image->address_attr & aspace) == aspace) &&
+		((image->cycle_attr & cycle) == cycle))) {
+		printk("Invalid attributes\n");
+		return -EINVAL;
+	}
+
+	retval = vme_check_window(aspace, vme_base, size);
+	if(retval)
+		return retval;
+
+	return bridge->slave_set(image, enabled, vme_base, size, buf_base,
+		aspace, cycle);
+}
+EXPORT_SYMBOL(vme_slave_set);
+
+int vme_slave_get (struct vme_resource *resource, int *enabled,
+	unsigned long long *vme_base, unsigned long long *size,
+	dma_addr_t *buf_base, vme_address_t *aspace, vme_cycle_t *cycle)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_slave_resource *image;
+
+	if (resource->type != VME_SLAVE) {
+		printk("Not a slave resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_slave_resource, list);
+
+	if (bridge->slave_set == NULL) {
+		printk("vme_slave_get not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->slave_get(image, enabled, vme_base, size, buf_base,
+		aspace, cycle);
+}
+EXPORT_SYMBOL(vme_slave_get);
+
+void vme_slave_free(struct vme_resource *resource)
+{
+	struct vme_slave_resource *slave_image;
+
+	if (resource->type != VME_SLAVE) {
+		printk("Not a slave resource\n");
+		return;
+	}
+
+	slave_image = list_entry(resource->entry, struct vme_slave_resource,
+		list);
+	if (slave_image == NULL) {
+		printk("Can't find slave resource\n");
+		return;
+	}
+
+	/* Unlock image */
+	down(&(slave_image->sem));
+	if (slave_image->locked == 0)
+		printk(KERN_ERR "Image is already free\n");
+
+	slave_image->locked = 0;
+	up(&(slave_image->sem));
+
+	/* Free up resource memory */
+	kfree(resource);
+}
+EXPORT_SYMBOL(vme_slave_free);
+
+/*
+ * Request a master image with specific attributes, return some unique
+ * identifier.
+ */
+struct vme_resource * vme_master_request(struct device *dev,
+	vme_address_t address, vme_cycle_t cycle, vme_width_t dwidth)
+{
+	struct vme_bridge *bridge;
+	struct list_head *master_pos = NULL;
+	struct vme_master_resource *allocated_image = NULL;
+	struct vme_master_resource *master_image = NULL;
+	struct vme_resource *resource = NULL;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		goto err_bus;
+	}
+
+	/* Loop through master resources */
+	list_for_each(master_pos, &(bridge->master_resources)) {
+		master_image = list_entry(master_pos,
+			struct vme_master_resource, list);
+
+		if (master_image == NULL) {
+			printk(KERN_WARNING "Registered NULL master resource\n");
+			continue;
+		}
+
+		/* Find an unlocked and compatible image */
+		spin_lock(&(master_image->lock));
+		if(((master_image->address_attr & address) == address) &&
+			((master_image->cycle_attr & cycle) == cycle) &&
+			((master_image->width_attr & dwidth) == dwidth) &&
+			(master_image->locked == 0)) {
+
+			master_image->locked = 1;
+			spin_unlock(&(master_image->lock));
+			allocated_image = master_image;
+			break;
+		}
+		spin_unlock(&(master_image->lock));
+	}
+
+	/* Check to see if we found a resource */
+	if (allocated_image == NULL) {
+		printk(KERN_ERR "Can't find a suitable resource\n");
+		goto err_image;
+	}
+
+	resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
+	if (resource == NULL) {
+		printk(KERN_ERR "Unable to allocate resource structure\n");
+		goto err_alloc;
+	}
+	resource->type = VME_MASTER;
+	resource->entry = &(allocated_image->list);
+
+	return resource;
+
+	kfree(resource);
+err_alloc:
+	/* Unlock image */
+	spin_lock(&(master_image->lock));
+	master_image->locked = 0;
+	spin_unlock(&(master_image->lock));
+err_image:
+err_bus:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_master_request);
+
+int vme_master_set (struct vme_resource *resource, int enabled,
+	unsigned long long vme_base, unsigned long long size,
+	vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_master_resource *image;
+	int retval;
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_master_resource, list);
+
+	if (bridge->master_set == NULL) {
+		printk("vme_master_set not supported\n");
+		return -EINVAL;
+	}
+
+	if(!(((image->address_attr & aspace) == aspace) &&
+		((image->cycle_attr & cycle) == cycle) &&
+		((image->width_attr & dwidth) == dwidth))) {
+		printk("Invalid attributes\n");
+		return -EINVAL;
+	}
+
+	retval = vme_check_window(aspace, vme_base, size);
+	if(retval)
+		return retval;
+
+	return bridge->master_set(image, enabled, vme_base, size, aspace,
+		cycle, dwidth);
+}
+EXPORT_SYMBOL(vme_master_set);
+
+int vme_master_get (struct vme_resource *resource, int *enabled,
+	unsigned long long *vme_base, unsigned long long *size,
+	vme_address_t *aspace, vme_cycle_t *cycle, vme_width_t *dwidth)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_master_resource *image;
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_master_resource, list);
+
+	if (bridge->master_set == NULL) {
+		printk("vme_master_set not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->master_get(image, enabled, vme_base, size, aspace,
+		cycle, dwidth);
+}
+EXPORT_SYMBOL(vme_master_get);
+
+/*
+ * Read data out of VME space into a buffer.
+ */
+ssize_t vme_master_read (struct vme_resource *resource, void *buf, size_t count,
+	loff_t offset)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_master_resource *image;
+	size_t length;
+
+	if (bridge->master_read == NULL) {
+		printk("Reading from resource not supported\n");
+		return -EINVAL;
+	}
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_master_resource, list);
+
+	length = vme_get_size(resource);
+
+	if (offset > length) {
+		printk("Invalid Offset\n");
+		return -EFAULT;
+	}
+
+	if ((offset + count) > length)
+		count = length - offset;
+
+	return bridge->master_read(image, buf, count, offset);
+
+}
+EXPORT_SYMBOL(vme_master_read);
+
+/*
+ * Write data out to VME space from a buffer.
+ */
+ssize_t vme_master_write (struct vme_resource *resource, void *buf,
+	size_t count, loff_t offset)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_master_resource *image;
+	size_t length;
+
+	if (bridge->master_write == NULL) {
+		printk("Writing to resource not supported\n");
+		return -EINVAL;
+	}
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_master_resource, list);
+
+	length = vme_get_size(resource);
+
+	if (offset > length) {
+		printk("Invalid Offset\n");
+		return -EFAULT;
+	}
+
+	if ((offset + count) > length)
+		count = length - offset;
+
+	return bridge->master_write(image, buf, count, offset);
+}
+EXPORT_SYMBOL(vme_master_write);
+
+/*
+ * Perform RMW cycle to provided location.
+ */
+unsigned int vme_master_rmw (struct vme_resource *resource, unsigned int mask,
+	unsigned int compare, unsigned int swap, loff_t offset)
+{
+	struct vme_bridge *bridge = find_bridge(resource);
+	struct vme_master_resource *image;
+
+	if (bridge->master_rmw == NULL) {
+		printk("Writing to resource not supported\n");
+		return -EINVAL;
+	}
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return -EINVAL;
+	}
+
+	image = list_entry(resource->entry, struct vme_master_resource, list);
+
+	return bridge->master_rmw(image, mask, compare, swap, offset);
+}
+EXPORT_SYMBOL(vme_master_rmw);
+
+void vme_master_free(struct vme_resource *resource)
+{
+	struct vme_master_resource *master_image;
+
+	if (resource->type != VME_MASTER) {
+		printk("Not a master resource\n");
+		return;
+	}
+
+	master_image = list_entry(resource->entry, struct vme_master_resource,
+		list);
+	if (master_image == NULL) {
+		printk("Can't find master resource\n");
+		return;
+	}
+
+	/* Unlock image */
+	spin_lock(&(master_image->lock));
+	if (master_image->locked == 0)
+		printk(KERN_ERR "Image is already free\n");
+
+	master_image->locked = 0;
+	spin_unlock(&(master_image->lock));
+
+	/* Free up resource memory */
+	kfree(resource);
+}
+EXPORT_SYMBOL(vme_master_free);
+
+/*
+ * Request a DMA controller with specific attributes, return some unique
+ * identifier.
+ */
+struct vme_resource *vme_request_dma(struct device *dev)
+{
+	struct vme_bridge *bridge;
+	struct list_head *dma_pos = NULL;
+	struct vme_dma_resource *allocated_ctrlr = NULL;
+	struct vme_dma_resource *dma_ctrlr = NULL;
+	struct vme_resource *resource = NULL;
+
+	/* XXX Not checking resource attributes */
+	printk(KERN_ERR "No VME resource Attribute tests done\n");
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		goto err_bus;
+	}
+
+	/* Loop through DMA resources */
+	list_for_each(dma_pos, &(bridge->dma_resources)) {
+		dma_ctrlr = list_entry(dma_pos,
+			struct vme_dma_resource, list);
+
+		if (dma_ctrlr == NULL) {
+			printk("Registered NULL DMA resource\n");
+			continue;
+		}
+
+		/* Find an unlocked controller */
+		down(&(dma_ctrlr->sem));
+		if(dma_ctrlr->locked == 0) {
+			dma_ctrlr->locked = 1;
+			up(&(dma_ctrlr->sem));
+			allocated_ctrlr = dma_ctrlr;
+			break;
+		}
+		up(&(dma_ctrlr->sem));
+	}
+
+	/* Check to see if we found a resource */
+	if (allocated_ctrlr == NULL)
+		goto err_ctrlr;
+
+	resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
+	if (resource == NULL) {
+		printk(KERN_WARNING "Unable to allocate resource structure\n");
+		goto err_alloc;
+	}
+	resource->type = VME_DMA;
+	resource->entry = &(allocated_ctrlr->list);
+
+	return resource;
+
+err_alloc:
+	/* Unlock image */
+	down(&(dma_ctrlr->sem));
+	dma_ctrlr->locked = 0;
+	up(&(dma_ctrlr->sem));
+err_ctrlr:
+err_bus:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_request_dma);
+
+/*
+ * Start new list
+ */
+struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
+{
+	struct vme_dma_resource *ctrlr;
+	struct vme_dma_list *dma_list;
+
+	if (resource->type != VME_DMA) {
+		printk("Not a DMA resource\n");
+		return NULL;
+	}
+
+	ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
+
+	dma_list = (struct vme_dma_list *)kmalloc(
+		sizeof(struct vme_dma_list), GFP_KERNEL);
+	if(dma_list == NULL) {
+		printk("Unable to allocate memory for new dma list\n");
+		return NULL;
+	}
+	INIT_LIST_HEAD(&(dma_list->entries));
+	dma_list->parent = ctrlr;
+	init_MUTEX(&(dma_list->sem));
+
+	return dma_list;
+}
+EXPORT_SYMBOL(vme_new_dma_list);
+
+/*
+ * Create "Pattern" type attributes
+ */
+struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern,
+	vme_pattern_t type)
+{
+	struct vme_dma_attr *attributes;
+	struct vme_dma_pattern *pattern_attr;
+
+	attributes = (struct vme_dma_attr *)kmalloc(
+		sizeof(struct vme_dma_attr), GFP_KERNEL);
+	if(attributes == NULL) {
+		printk("Unable to allocate memory for attributes structure\n");
+		goto err_attr;
+	}
+
+	pattern_attr = (struct vme_dma_pattern *)kmalloc(
+		sizeof(struct vme_dma_pattern), GFP_KERNEL);
+	if(pattern_attr == NULL) {
+		printk("Unable to allocate memory for pattern attributes\n");
+		goto err_pat;
+	}
+
+	attributes->type = VME_DMA_PATTERN;
+	attributes->private = (void *)pattern_attr;
+
+	pattern_attr->pattern = pattern;
+	pattern_attr->type = type;
+
+	return attributes;
+
+	kfree(pattern_attr);
+err_pat:
+	kfree(attributes);
+err_attr:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_dma_pattern_attribute);
+
+/*
+ * Create "PCI" type attributes
+ */
+struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
+{
+	struct vme_dma_attr *attributes;
+	struct vme_dma_pci *pci_attr;
+
+	/* XXX Run some sanity checks here */
+
+	attributes = (struct vme_dma_attr *)kmalloc(
+		sizeof(struct vme_dma_attr), GFP_KERNEL);
+	if(attributes == NULL) {
+		printk("Unable to allocate memory for attributes structure\n");
+		goto err_attr;
+	}
+
+	pci_attr = (struct vme_dma_pci *)kmalloc(sizeof(struct vme_dma_pci),
+		GFP_KERNEL);
+	if(pci_attr == NULL) {
+		printk("Unable to allocate memory for pci attributes\n");
+		goto err_pci;
+	}
+
+
+
+	attributes->type = VME_DMA_PCI;
+	attributes->private = (void *)pci_attr;
+
+	pci_attr->address = address;
+
+	return attributes;
+
+	kfree(pci_attr);
+err_pci:
+	kfree(attributes);
+err_attr:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_dma_pci_attribute);
+
+/*
+ * Create "VME" type attributes
+ */
+struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
+	vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth)
+{
+	struct vme_dma_attr *attributes;
+	struct vme_dma_vme *vme_attr;
+
+	/* XXX Run some sanity checks here */
+
+	attributes = (struct vme_dma_attr *)kmalloc(
+		sizeof(struct vme_dma_attr), GFP_KERNEL);
+	if(attributes == NULL) {
+		printk("Unable to allocate memory for attributes structure\n");
+		goto err_attr;
+	}
+
+	vme_attr = (struct vme_dma_vme *)kmalloc(sizeof(struct vme_dma_vme),
+		GFP_KERNEL);
+	if(vme_attr == NULL) {
+		printk("Unable to allocate memory for vme attributes\n");
+		goto err_vme;
+	}
+
+	attributes->type = VME_DMA_VME;
+	attributes->private = (void *)vme_attr;
+
+	vme_attr->address = address;
+	vme_attr->aspace = aspace;
+	vme_attr->cycle = cycle;
+	vme_attr->dwidth = dwidth;
+
+	return attributes;
+
+	kfree(vme_attr);
+err_vme:
+	kfree(attributes);
+err_attr:
+	return NULL;
+}
+EXPORT_SYMBOL(vme_dma_vme_attribute);
+
+/*
+ * Free attribute
+ */
+void vme_dma_free_attribute(struct vme_dma_attr *attributes)
+{
+	kfree(attributes->private);
+	kfree(attributes);
+}
+EXPORT_SYMBOL(vme_dma_free_attribute);
+
+int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
+	struct vme_dma_attr *dest, size_t count)
+{
+	struct vme_bridge *bridge = list->parent->parent;
+	int retval;
+
+	if (bridge->dma_list_add == NULL) {
+		printk("Link List DMA generation not supported\n");
+		return -EINVAL;
+	}
+
+	if (down_trylock(&(list->sem))) {
+		printk("Link List already submitted\n");
+		return -EINVAL;
+	}
+
+	retval = bridge->dma_list_add(list, src, dest, count);
+
+	up(&(list->sem));
+
+	return retval;
+}
+EXPORT_SYMBOL(vme_dma_list_add);
+
+int vme_dma_list_exec(struct vme_dma_list *list)
+{
+	struct vme_bridge *bridge = list->parent->parent;
+	int retval;
+
+	if (bridge->dma_list_exec == NULL) {
+		printk("Link List DMA execution not supported\n");
+		return -EINVAL;
+	}
+
+	down(&(list->sem));
+
+	retval = bridge->dma_list_exec(list);
+
+	up(&(list->sem));
+
+	return retval;
+}
+EXPORT_SYMBOL(vme_dma_list_exec);
+
+int vme_dma_list_free(struct vme_dma_list *list)
+{
+	struct vme_bridge *bridge = list->parent->parent;
+	int retval;
+
+	if (bridge->dma_list_empty == NULL) {
+		printk("Emptying of Link Lists not supported\n");
+		return -EINVAL;
+	}
+
+	if (down_trylock(&(list->sem))) {
+		printk("Link List in use\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Empty out all of the entries from the dma list. We need to go to the
+	 * low level driver as dma entries are driver specific.
+	 */
+	retval = bridge->dma_list_empty(list);
+	if (retval) {
+		printk("Unable to empty link-list entries\n");
+		up(&(list->sem));
+		return retval;
+	}
+	up(&(list->sem));
+	kfree(list);
+
+	return retval;
+}
+EXPORT_SYMBOL(vme_dma_list_free);
+
+int vme_dma_free(struct vme_resource *resource)
+{
+	struct vme_dma_resource *ctrlr;
+
+	if (resource->type != VME_DMA) {
+		printk("Not a DMA resource\n");
+		return -EINVAL;
+	}
+
+	ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
+
+	if (down_trylock(&(ctrlr->sem))) {
+		printk("Resource busy, can't free\n");
+		return -EBUSY;
+	}
+
+	if (!(list_empty(&(ctrlr->pending)) && list_empty(&(ctrlr->running)))) {
+		printk("Resource still processing transfers\n");
+		up(&(ctrlr->sem));
+		return -EBUSY;
+	}
+
+	ctrlr->locked = 0;
+
+	up(&(ctrlr->sem));
+
+	return 0;
+}
+EXPORT_SYMBOL(vme_dma_free);
+
+int vme_request_irq(struct device *dev, int level, int statid,
+	void (*callback)(int level, int vector, void *priv_data),
+	void *priv_data)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if((level < 1) || (level > 7)) {
+		printk(KERN_WARNING "Invalid interrupt level\n");
+		return -EINVAL;
+	}
+
+	if (bridge->request_irq == NULL) {
+		printk("Registering interrupts not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->request_irq(level, statid, callback, priv_data);
+}
+EXPORT_SYMBOL(vme_request_irq);
+
+void vme_free_irq(struct device *dev, int level, int statid)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return;
+	}
+
+	if((level < 1) || (level > 7)) {
+		printk(KERN_WARNING "Invalid interrupt level\n");
+		return;
+	}
+
+	if (bridge->free_irq == NULL) {
+		printk("Freeing interrupts not supported\n");
+		return;
+	}
+
+	bridge->free_irq(level, statid);
+}
+EXPORT_SYMBOL(vme_free_irq);
+
+int vme_generate_irq(struct device *dev, int level, int statid)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if((level < 1) || (level > 7)) {
+		printk(KERN_WARNING "Invalid interrupt level\n");
+		return -EINVAL;
+	}
+
+	if (bridge->generate_irq == NULL) {
+		printk("Interrupt generation not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->generate_irq(level, statid);
+}
+EXPORT_SYMBOL(vme_generate_irq);
+
+int vme_lm_set(struct device *dev, unsigned long long lm_base, vme_address_t aspace,
+	vme_cycle_t cycle)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if (bridge->lm_set == NULL) {
+		printk("vme_lm_set not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->lm_set(lm_base, aspace, cycle);
+}
+EXPORT_SYMBOL(vme_lm_set);
+
+int vme_lm_get(struct device *dev, unsigned long long *lm_base, vme_address_t *aspace,
+	vme_cycle_t *cycle)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if (bridge->lm_get == NULL) {
+		printk("vme_lm_get not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->lm_get(lm_base, aspace, cycle);
+}
+EXPORT_SYMBOL(vme_lm_get);
+
+int vme_lm_attach(struct device *dev, int monitor, void (*callback)(int))
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if (bridge->lm_attach == NULL) {
+		printk("vme_lm_attach not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->lm_attach(monitor, callback);
+}
+EXPORT_SYMBOL(vme_lm_attach);
+
+int vme_lm_detach(struct device *dev, int monitor)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(dev);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if (bridge->lm_detach == NULL) {
+		printk("vme_lm_detach not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->lm_detach(monitor);
+}
+EXPORT_SYMBOL(vme_lm_detach);
+
+int vme_slot_get(struct device *bus)
+{
+	struct vme_bridge *bridge;
+
+	bridge = dev_to_bridge(bus);
+	if (bridge == NULL) {
+		printk(KERN_ERR "Can't find VME bus\n");
+		return -EINVAL;
+	}
+
+	if (bridge->slot_get == NULL) {
+		printk("vme_slot_get not supported\n");
+		return -EINVAL;
+	}
+
+	return bridge->slot_get();
+}
+EXPORT_SYMBOL(vme_slot_get);
+
+
+/* - Bridge Registration --------------------------------------------------- */
+
+static int vme_alloc_bus_num(void)
+{
+	int i;
+
+	down(&vme_bus_num_sem);
+	for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) {
+		if (((vme_bus_numbers >> i) & 0x1) == 0) {
+			vme_bus_numbers |= (0x1 << i);
+			break;
+		}
+	}
+	up(&vme_bus_num_sem);
+
+	return i;
+}
+
+static void vme_free_bus_num(int bus)
+{
+	down(&vme_bus_num_sem);
+	vme_bus_numbers |= ~(0x1 << bus);
+	up(&vme_bus_num_sem);
+}
+
+int vme_register_bridge (struct vme_bridge *bridge)
+{
+	struct device *dev;
+	int retval;
+	int i;
+
+	bridge->num = vme_alloc_bus_num();
+
+	/* This creates 32 vme "slot" devices. This equates to a slot for each
+	 * ID available in a system conforming to the ANSI/VITA 1-1994
+	 * specification.
+	 */
+	for (i = 0; i < VME_SLOTS_MAX; i++) {
+		dev = &(bridge->dev[i]);
+		memset(dev, 0, sizeof(struct device));
+
+		dev->parent = bridge->parent;
+		dev->bus = &(vme_bus_type);
+		/*
+		 * We save a pointer to the bridge in platform_data so that we
+		 * can get to it later. We keep driver_data for use by the
+		 * driver that binds against the slot
+		 */
+		dev->platform_data = bridge;
+		dev_set_name(dev, "vme-%x.%x", bridge->num, i + 1);
+
+		retval = device_register(dev);
+		if(retval)
+			goto err_reg;
+	}
+
+	return retval;
+
+	i = VME_SLOTS_MAX;
+err_reg:
+	while (i > -1) {
+		dev = &(bridge->dev[i]);
+		device_unregister(dev);
+	}
+	vme_free_bus_num(bridge->num);
+	return retval;
+}
+EXPORT_SYMBOL(vme_register_bridge);
+
+void vme_unregister_bridge (struct vme_bridge *bridge)
+{
+	int i;
+	struct device *dev;
+
+
+	for (i = 0; i < VME_SLOTS_MAX; i++) {
+		dev = &(bridge->dev[i]);
+		device_unregister(dev);
+	}
+	vme_free_bus_num(bridge->num);
+}
+EXPORT_SYMBOL(vme_unregister_bridge);
+
+
+/* - Driver Registration --------------------------------------------------- */
+
+int vme_register_driver (struct vme_driver *drv)
+{
+	drv->driver.name = drv->name;
+	drv->driver.bus = &vme_bus_type;
+
+	return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(vme_register_driver);
+
+void vme_unregister_driver (struct vme_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL(vme_unregister_driver);
+
+/* - Bus Registration ------------------------------------------------------ */
+
+int vme_calc_slot(struct device *dev)
+{
+	struct vme_bridge *bridge;
+	int num;
+
+	bridge = dev_to_bridge(dev);
+
+	/* Determine slot number */
+	num = 0;
+	while(num < VME_SLOTS_MAX) {
+		if(&(bridge->dev[num]) == dev) {
+			break;
+		}
+		num++;
+	}
+	if (num == VME_SLOTS_MAX) {
+		dev_err(dev, "Failed to identify slot\n");
+		num = 0;
+		goto err_dev;
+	}
+	num++;
+
+err_dev:
+	return num;
+}
+
+static struct vme_driver *dev_to_vme_driver(struct device *dev)
+{
+	if(dev->driver == NULL)
+		printk("Bugger dev->driver is NULL\n");
+
+	return container_of(dev->driver, struct vme_driver, driver);
+}
+
+static int vme_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct vme_bridge *bridge;
+	struct vme_driver *driver;
+	int i, num;
+
+	bridge = dev_to_bridge(dev);
+	driver = container_of(drv, struct vme_driver, driver);
+
+	num = vme_calc_slot(dev);
+	if (!num)
+		goto err_dev;
+
+	if (driver->bind_table == NULL) {
+		dev_err(dev, "Bind table NULL\n");
+		goto err_table;
+	}
+
+	i = 0;
+	while((driver->bind_table[i].bus != 0) ||
+		(driver->bind_table[i].slot != 0)) {
+
+		if ((bridge->num == driver->bind_table[i].bus) &&
+			(num == driver->bind_table[i].slot))
+			return 1;
+		i++;
+	}
+
+err_dev:
+err_table:
+	return 0;
+}
+
+static int vme_bus_probe(struct device *dev)
+{
+	struct vme_bridge *bridge;
+	struct vme_driver *driver;
+	int retval = -ENODEV;
+
+	driver = dev_to_vme_driver(dev);
+	bridge = dev_to_bridge(dev);
+
+	if(driver->probe != NULL) {
+		retval = driver->probe(dev, bridge->num, vme_calc_slot(dev));
+	}
+
+	return retval;
+}
+
+static int vme_bus_remove(struct device *dev)
+{
+	struct vme_bridge *bridge;
+	struct vme_driver *driver;
+	int retval = -ENODEV;
+
+	driver = dev_to_vme_driver(dev);
+	bridge = dev_to_bridge(dev);
+
+	if(driver->remove != NULL) {
+		retval = driver->remove(dev, bridge->num, vme_calc_slot(dev));
+	}
+
+	return retval;
+}
+
+struct bus_type vme_bus_type = {
+	.name = "vme",
+	.match = vme_bus_match,
+	.probe = vme_bus_probe,
+	.remove = vme_bus_remove,
+};
+EXPORT_SYMBOL(vme_bus_type);
+
+static int __init vme_init (void)
+{
+	return bus_register(&vme_bus_type);
+}
+
+static void __exit vme_exit (void)
+{
+	bus_unregister(&vme_bus_type);
+}
+
+MODULE_DESCRIPTION("VME bridge driver framework");
+MODULE_AUTHOR("Martyn Welch <martyn.welch@gefanuc.com");
+MODULE_LICENSE("GPL");
+
+module_init(vme_init);
+module_exit(vme_exit);

drivers/staging/vme/vme.h

+#ifndef _VME_H_
+#define _VME_H_
+
+/* Resource Type */
+enum vme_resource_type {
+	VME_MASTER,
+	VME_SLAVE,
+	VME_DMA
+};
+
+/* VME Address Spaces */
+typedef u32 vme_address_t;
+#define VME_A16		0x1
+#define VME_A24		0x2
+#define	VME_A32		0x4
+#define VME_A64		0x8
+#define VME_CRCSR	0x10
+#define VME_USER1	0x20
+#define VME_USER2	0x40
+#define VME_USER3	0x80
+#define VME_USER4	0x100
+
+#define VME_A16_MAX	0x10000ULL
+#define VME_A24_MAX	0x1000000ULL
+#define VME_A32_MAX	0x100000000ULL
+#define VME_A64_MAX	0x10000000000000000ULL
+#define VME_CRCSR_MAX	0x1000000ULL
+
+
+/* VME Cycle Types */
+typedef u32 vme_cycle_t;
+#define VME_SCT		0x1
+#define VME_BLT		0x2
+#define VME_MBLT	0x4
+#define VME_2eVME	0x8
+#define VME_2eSST	0x10
+#define VME_2eSSTB	0x20
+
+#define VME_2eSST160	0x100
+#define VME_2eSST267	0x200
+#define VME_2eSST320	0x400
+
+#define	VME_SUPER	0x1000
+#define	VME_USER	0x2000
+#define	VME_PROG	0x4000
+#define	VME_DATA	0x8000
+
+/* VME Data Widths */
+typedef u32 vme_width_t;
+#define VME_D8		0x1
+#define VME_D16		0x2
+#define VME_D32		0x4
+#define VME_D64		0x8
+
+/* Arbitration Scheduling Modes */
+typedef u32 vme_arbitration_t;
+#define VME_R_ROBIN_MODE	0x1
+#define VME_PRIORITY_MODE	0x2
+
+typedef u32 vme_dma_t;
+#define VME_DMA_PATTERN			(1<<0)
+#define VME_DMA_PCI			(1<<1)
+#define VME_DMA_VME			(1<<2)
+
+typedef u32 vme_pattern_t;
+#define VME_DMA_PATTERN_BYTE		(1<<0)
+#define VME_DMA_PATTERN_WORD		(1<<1)
+#define VME_DMA_PATTERN_INCREMENT	(1<<2)
+
+struct vme_dma_attr {
+	vme_dma_t type;
+	void *private;
+};
+
+struct vme_resource {
+	enum vme_resource_type type;
+	struct list_head *entry;
+};
+
+extern struct bus_type vme_bus_type;
+
+struct vme_device_id {
+	int bus;
+	int slot;
+};
+
+struct vme_driver {
+	struct list_head node;
+	char *name;
+	const struct vme_device_id *bind_table;
+	int (*probe)  (struct device *, int, int);
+	int (*remove) (struct device *, int, int);
+	void (*shutdown) (void);
+	struct device_driver    driver;
+};
+
+void * vme_alloc_consistent(struct vme_resource *, size_t, dma_addr_t *);
+void vme_free_consistent(struct vme_resource *, size_t,  void *,
+	dma_addr_t);
+
+size_t vme_get_size(struct vme_resource *);
+
+struct vme_resource * vme_slave_request(struct device *, vme_address_t, vme_cycle_t);
+int vme_slave_set (struct vme_resource *, int, unsigned long long,
+	unsigned long long, dma_addr_t, vme_address_t, vme_cycle_t);
+int vme_slave_get (struct vme_resource *, int *, unsigned long long *,
+	unsigned long long *, dma_addr_t *, vme_address_t *, vme_cycle_t *);
+void vme_slave_free(struct vme_resource *);
+
+struct vme_resource * vme_master_request(struct device *, vme_address_t, vme_cycle_t,
+	vme_width_t);
+int vme_master_set (struct vme_resource *, int, unsigned long long,
+	unsigned long long, vme_address_t, vme_cycle_t, vme_width_t);
+int vme_master_get (struct vme_resource *, int *, unsigned long long *,
+	unsigned long long *, vme_address_t *, vme_cycle_t *, vme_width_t *);
+ssize_t vme_master_read(struct vme_resource *, void *, size_t, loff_t);
+ssize_t vme_master_write(struct vme_resource *, void *, size_t, loff_t);
+unsigned int vme_master_rmw (struct vme_resource *, unsigned int, unsigned int,
+	unsigned int, loff_t);
+void vme_master_free(struct vme_resource *);
+
+struct vme_resource *vme_request_dma(struct device *);
+struct vme_dma_list *vme_new_dma_list(struct vme_resource *);
+struct vme_dma_attr *vme_dma_pattern_attribute(u32, vme_pattern_t);
+struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t);
+struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long, vme_address_t,
+	vme_cycle_t, vme_width_t);
+void vme_dma_free_attribute(struct vme_dma_attr *);
+int vme_dma_list_add(struct vme_dma_list *, struct vme_dma_attr *,
+	struct vme_dma_attr *, size_t);
+int vme_dma_list_exec(struct vme_dma_list *);
+int vme_dma_list_free(struct vme_dma_list *);
+int vme_dma_free(struct vme_resource *);
+
+int vme_request_irq(struct device *, int, int,
+	void (*callback)(int, int, void *), void *);
+void vme_free_irq(struct device *, int, int);
+int vme_generate_irq(struct device *, int, int);
+
+int vme_lm_set(struct device *, unsigned long long, vme_address_t, vme_cycle_t);
+int vme_lm_get(struct device *, unsigned long long *, vme_address_t *,
+	vme_cycle_t *);
+int vme_lm_attach(struct device *, int, void (*callback)(int));
+int vme_lm_detach(struct device *, int);
+
+int vme_slot_get(struct device *);
+
+int vme_register_driver (struct vme_driver *);
+void vme_unregister_driver (struct vme_driver *);
+
+
+#endif /* _VME_H_ */
+

drivers/staging/vme/vme_bridge.h

+#ifndef _VME_BRIDGE_H_
+#define _VME_BRIDGE_H_
+
+#define VME_CRCSR_BUF_SIZE (508*1024)
+#define VME_SLOTS_MAX 32
+/*
+ * Resource structures
+ */
+struct vme_master_resource {
+	struct list_head list;
+	struct vme_bridge *parent;
+	/*
+	 * We are likely to need to access the VME bus in interrupt context, so
+	 * protect master routines with a spinlock rather than a semaphore.
+	 */
+	spinlock_t lock;
+	int locked;
+	int number;
+	vme_address_t address_attr;
+	vme_cycle_t cycle_attr;
+	vme_width_t width_attr;
+	struct resource pci_resource;	/* XXX Rename to be bus agnostic */
+	void *kern_base;
+};
+
+struct vme_slave_resource {
+	struct list_head list;
+	struct vme_bridge *parent;
+	struct semaphore sem;
+	int locked;
+	int number;
+	vme_address_t address_attr;
+	vme_cycle_t cycle_attr;
+};
+
+struct vme_dma_pattern {
+	u32 pattern;
+	vme_pattern_t type;
+};
+
+struct vme_dma_pci {
+	dma_addr_t address;
+};
+
+struct vme_dma_vme {
+	unsigned long long address;
+	vme_address_t aspace;
+	vme_cycle_t cycle;
+	vme_width_t dwidth;
+};
+
+struct vme_dma_list {
+	struct list_head list;
+	struct vme_dma_resource *parent;
+	struct list_head entries;
+	struct semaphore sem;
+};
+
+struct vme_dma_resource {
+	struct list_head list;
+	struct vme_bridge *parent;
+	struct semaphore sem;
+	int locked;
+	int number;
+	struct list_head pending;
+	struct list_head running;
+};
+
+struct vme_bus_error {
+	struct list_head list;
+	unsigned long long address;
+	u32 attributes;
+};
+
+struct vme_callback {
+	void (*func)(int, int, void*);
+	void *priv_data;
+};
+
+struct vme_irq {
+	int count;
+	struct vme_callback callback[255];
+};
+
+/* Allow 16 characters for name (including null character) */
+#define VMENAMSIZ 16
+
+/* This structure stores all the information about one bridge
+ * The structure should be dynamically allocated by the driver and one instance
+ * of the structure should be present for each VME chip present in the system.
+ *
+ * Currently we assume that all chips are PCI-based
+ */
+struct vme_bridge {
+        char name[VMENAMSIZ];
+	int num;
+	struct list_head master_resources;
+	struct list_head slave_resources;
+	struct list_head dma_resources;
+
+	struct list_head vme_errors;	/* List for errors generated on VME */
+
+	/* Bridge Info - XXX Move to private structure? */
+	struct device *parent;	/* Generic device struct (pdev->dev for PCI) */
+	void * base;		/* Base Address of device registers */
+
+	struct device dev[VME_SLOTS_MAX];	/* Device registered with
+						 * device model on VME bus
+						 */
+
+	/* Interrupt callbacks */
+	struct vme_irq irq[7];
+
+	/* Slave Functions */
+	int (*slave_get) (struct vme_slave_resource *, int *,
+		unsigned long long *, unsigned long long *, dma_addr_t *,
+		vme_address_t *, vme_cycle_t *);
+	int (*slave_set) (struct vme_slave_resource *, int, unsigned long long,
+		unsigned long long, dma_addr_t, vme_address_t, vme_cycle_t);
+
+	/* Master Functions */
+	int (*master_get) (struct vme_master_resource *, int *,
+		unsigned long long *, unsigned long long *, vme_address_t *,
+		vme_cycle_t *, vme_width_t *);
+	int (*master_set) (struct vme_master_resource *, int,
+		unsigned long long, unsigned long long,  vme_address_t,
+		vme_cycle_t, vme_width_t);
+	ssize_t (*master_read) (struct vme_master_resource *, void *, size_t,
+		loff_t);
+	ssize_t (*master_write) (struct vme_master_resource *, void *, size_t,
+		loff_t);
+	unsigned int (*master_rmw) (struct vme_master_resource *, unsigned int,
+		unsigned int, unsigned int, loff_t);
+
+	/* DMA Functions */
+	int (*dma_list_add) (struct vme_dma_list *, struct vme_dma_attr *,
+		struct vme_dma_attr *, size_t);
+	int (*dma_list_exec) (struct vme_dma_list *);
+	int (*dma_list_empty) (struct vme_dma_list *);
+
+	/* Interrupt Functions */
+	int (*request_irq) (int, int, void (*cback)(int, int, void*), void *);
+	void (*free_irq) (int, int);
+	int (*generate_irq) (int, int);
+
+	/* Location monitor functions */
+	int (*lm_set) (unsigned long long, vme_address_t, vme_cycle_t);
+	int (*lm_get) (unsigned long long *, vme_address_t *, vme_cycle_t *);
+	int (*lm_attach) (int, void (*callback)(int));
+	int (*lm_detach) (int);
+
+	/* CR/CSR space functions */
+	int (*slot_get) (void);
+	/* Use standard master read and write functions to access CR/CSR */
+
+#if 0
+	int (*set_prefetch) (void);
+	int (*get_prefetch) (void);
+	int (*set_arbiter) (void);
+	int (*get_arbiter) (void);
+	int (*set_requestor) (void);
+	int (*get_requestor) (void);
+#endif
+};
+
+int vme_register_bridge (struct vme_bridge *);
+void vme_unregister_bridge (struct vme_bridge *);
+
+#endif /* _VME_BRIDGE_H_ */
+
+#if 0
+/*
+ *  VMEbus GET INFO Arg Structure
+ */
+struct vmeInfoCfg {
+	int vmeSlotNum;		/*  VME slot number of interest */
+	int boardResponded;	/* Board responded */
+	char sysConFlag;	/*  System controller flag */
+	int vmeControllerID;	/*  Vendor/device ID of VME bridge */
+	int vmeControllerRev;	/*  Revision of VME bridge */
+	char osName[8];		/*  Name of OS e.g. "Linux" */
+	int vmeSharedDataValid;	/*  Validity of data struct */
+	int vmeDriverRev;	/*  Revision of VME driver */
+	unsigned int vmeAddrHi[8];	/* Address on VME bus */
+	unsigned int vmeAddrLo[8];	/* Address on VME bus */
+	unsigned int vmeSize[8];	/* Size on VME bus */
+	unsigned int vmeAm[8];	/* Address modifier on VME bus */
+	int reserved;		/* For future use */
+};
+typedef struct vmeInfoCfg vmeInfoCfg_t;
+
+/*
+ *  VMEbus Requester Arg Structure
+ */
+struct vmeRequesterCfg {
+	int requestLevel;	/*  Requester Bus Request Level */
+	char fairMode;		/*  Requester Fairness Mode Indicator */
+	int releaseMode;	/*  Requester Bus Release Mode */
+	int timeonTimeoutTimer;	/*  Master Time-on Time-out Timer */
+	int timeoffTimeoutTimer;	/*  Master Time-off Time-out Timer */
+	int reserved;		/* For future use */
+};
+typedef struct vmeRequesterCfg vmeRequesterCfg_t;
+
+/*
+ *  VMEbus Arbiter Arg Structure
+ */
+struct vmeArbiterCfg {
+	vme_arbitration_t arbiterMode;	/*  Arbitration Scheduling Algorithm */
+	char arbiterTimeoutFlag;	/*  Arbiter Time-out Timer Indicator */
+	int globalTimeoutTimer;	/*  VMEbus Global Time-out Timer */
+	char noEarlyReleaseFlag;	/*  No Early Release on BBUSY */
+	int reserved;		/* For future use */
+};
+typedef struct vmeArbiterCfg vmeArbiterCfg_t;
+
+
+/*
+ *  VMEbus RMW Configuration Data
+ */
+struct vmeRmwCfg {
+	unsigned int targetAddrU;	/*  VME Address (Upper) to trigger RMW cycle */
+	unsigned int targetAddr;	/*  VME Address (Lower) to trigger RMW cycle */
+	vme_address_t addrSpace;	/*  VME Address Space */
+	int enableMask;		/*  Bit mask defining the bits of interest */
+	int compareData;	/*  Data to be compared with the data read */
+	int swapData;		/*  Data written to the VMEbus on success */
+	int maxAttempts;	/*  Maximum times to try */
+	int numAttempts;	/*  Number of attempts before success */
+	int reserved;		/* For future use */
+
+};
+typedef struct vmeRmwCfg vmeRmwCfg_t;
+
+/*
+ *  VMEbus Location Monitor Arg Structure
+ */
+struct vmeLmCfg {
+	unsigned int addrU;	/*  Location Monitor Address upper */
+	unsigned int addr;	/*  Location Monitor Address lower */
+	vme_address_t addrSpace;	/*  Address Space */
+	int userAccessType;	/*  User/Supervisor Access Type */
+	int dataAccessType;	/*  Data/Program Access Type */
+	int lmWait;		/* Time to wait for access */
+	int lmEvents;		/* Lm event mask */
+	int reserved;		/* For future use */
+};
+typedef struct vmeLmCfg vmeLmCfg_t;
+#endif