+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * VME Bridge Framework
- *
- * Author: Martyn Welch <martyn.welch@ge.com>
- * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
- *
- * Based on work by Tom Armistead and Ajit Prem
- * Copyright 2004 Motorola Inc.
- */
-
-#include <linux/init.h>
-#include <linux/export.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/mutex.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/vme.h>
-
-#include "vme_bridge.h"
-
-/* Bitmask and list of registered buses both protected by common mutex */
-static unsigned int vme_bus_numbers;
-static LIST_HEAD(vme_bus_list);
-static DEFINE_MUTEX(vme_buses_lock);
-
-static int __init vme_init(void);
-
-static struct vme_dev *dev_to_vme_dev(struct device *dev)
-{
- return container_of(dev, struct vme_dev, dev);
-}
-
-/*
- * 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;
- case VME_SLAVE:
- return list_entry(resource->entry, struct vme_slave_resource,
- list)->parent;
- case VME_DMA:
- return list_entry(resource->entry, struct vme_dma_resource,
- list)->parent;
- case VME_LM:
- return list_entry(resource->entry, struct vme_lm_resource,
- list)->parent;
- default:
- printk(KERN_ERR "Unknown resource type\n");
- return NULL;
- }
-}
-
-/**
- * vme_alloc_consistent - Allocate contiguous memory.
- * @resource: Pointer to VME resource.
- * @size: Size of allocation required.
- * @dma: Pointer to variable to store physical address of allocation.
- *
- * Allocate a contiguous block of memory for use by the driver. This is used to
- * create the buffers for the slave windows.
- *
- * Return: Virtual address of allocation on success, NULL on failure.
- */
-void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
- dma_addr_t *dma)
-{
- struct vme_bridge *bridge;
-
- if (!resource) {
- printk(KERN_ERR "No resource\n");
- return NULL;
- }
-
- bridge = find_bridge(resource);
- if (!bridge) {
- printk(KERN_ERR "Can't find bridge\n");
- return NULL;
- }
-
- if (!bridge->parent) {
- printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
- return NULL;
- }
-
- if (!bridge->alloc_consistent) {
- printk(KERN_ERR "alloc_consistent not supported by bridge %s\n",
- bridge->name);
- return NULL;
- }
-
- return bridge->alloc_consistent(bridge->parent, size, dma);
-}
-EXPORT_SYMBOL(vme_alloc_consistent);
-
-/**
- * vme_free_consistent - Free previously allocated memory.
- * @resource: Pointer to VME resource.
- * @size: Size of allocation to free.
- * @vaddr: Virtual address of allocation.
- * @dma: Physical address of allocation.
- *
- * Free previously allocated block of contiguous memory.
- */
-void vme_free_consistent(struct vme_resource *resource, size_t size,
- void *vaddr, dma_addr_t dma)
-{
- struct vme_bridge *bridge;
-
- if (!resource) {
- printk(KERN_ERR "No resource\n");
- return;
- }
-
- bridge = find_bridge(resource);
- if (!bridge) {
- printk(KERN_ERR "Can't find bridge\n");
- return;
- }
-
- if (!bridge->parent) {
- printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
- return;
- }
-
- if (!bridge->free_consistent) {
- printk(KERN_ERR "free_consistent not supported by bridge %s\n",
- bridge->name);
- return;
- }
-
- bridge->free_consistent(bridge->parent, size, vaddr, dma);
-}
-EXPORT_SYMBOL(vme_free_consistent);
-
-/**
- * vme_get_size - Helper function returning size of a VME window
- * @resource: Pointer to VME slave or master resource.
- *
- * Determine the size of the VME window provided. This is a helper
- * function, wrappering the call to vme_master_get or vme_slave_get
- * depending on the type of window resource handed to it.
- *
- * Return: Size of the window on success, zero on failure.
- */
-size_t vme_get_size(struct vme_resource *resource)
-{
- int enabled, retval;
- unsigned long long base, size;
- dma_addr_t buf_base;
- u32 aspace, cycle, dwidth;
-
- switch (resource->type) {
- case VME_MASTER:
- retval = vme_master_get(resource, &enabled, &base, &size,
- &aspace, &cycle, &dwidth);
- if (retval)
- return 0;
-
- return size;
- case VME_SLAVE:
- retval = vme_slave_get(resource, &enabled, &base, &size,
- &buf_base, &aspace, &cycle);
- if (retval)
- return 0;
-
- return size;
- case VME_DMA:
- return 0;
- default:
- printk(KERN_ERR "Unknown resource type\n");
- return 0;
- }
-}
-EXPORT_SYMBOL(vme_get_size);
-
-int vme_check_window(u32 aspace, unsigned long long vme_base,
- unsigned long long size)
-{
- int retval = 0;
-
- if (vme_base + size < size)
- return -EINVAL;
-
- switch (aspace) {
- case VME_A16:
- if (vme_base + size > VME_A16_MAX)
- retval = -EFAULT;
- break;
- case VME_A24:
- if (vme_base + size > VME_A24_MAX)
- retval = -EFAULT;
- break;
- case VME_A32:
- if (vme_base + size > VME_A32_MAX)
- retval = -EFAULT;
- break;
- case VME_A64:
- /* The VME_A64_MAX limit is actually U64_MAX + 1 */
- break;
- case VME_CRCSR:
- if (vme_base + size > VME_CRCSR_MAX)
- retval = -EFAULT;
- break;
- case VME_USER1:
- case VME_USER2:
- case VME_USER3:
- case VME_USER4:
- /* User Defined */
- break;
- default:
- printk(KERN_ERR "Invalid address space\n");
- retval = -EINVAL;
- break;
- }
-
- return retval;
-}
-EXPORT_SYMBOL(vme_check_window);
-
-static u32 vme_get_aspace(int am)
-{
- switch (am) {
- case 0x29:
- case 0x2D:
- return VME_A16;
- case 0x38:
- case 0x39:
- case 0x3A:
- case 0x3B:
- case 0x3C:
- case 0x3D:
- case 0x3E:
- case 0x3F:
- return VME_A24;
- case 0x8:
- case 0x9:
- case 0xA:
- case 0xB:
- case 0xC:
- case 0xD:
- case 0xE:
- case 0xF:
- return VME_A32;
- case 0x0:
- case 0x1:
- case 0x3:
- return VME_A64;
- }
-
- return 0;
-}
-
-/**
- * vme_slave_request - Request a VME slave window resource.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @address: Required VME address space.
- * @cycle: Required VME data transfer cycle type.
- *
- * Request use of a VME window resource capable of being set for the requested
- * address space and data transfer cycle.
- *
- * Return: Pointer to VME resource on success, NULL on failure.
- */
-struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
- u32 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 = vdev->bridge;
- if (!bridge) {
- 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) {
- printk(KERN_ERR "Registered NULL Slave resource\n");
- continue;
- }
-
- /* Find an unlocked and compatible image */
- mutex_lock(&slave_image->mtx);
- if (((slave_image->address_attr & address) == address) &&
- ((slave_image->cycle_attr & cycle) == cycle) &&
- (slave_image->locked == 0)) {
-
- slave_image->locked = 1;
- mutex_unlock(&slave_image->mtx);
- allocated_image = slave_image;
- break;
- }
- mutex_unlock(&slave_image->mtx);
- }
-
- /* No free image */
- if (!allocated_image)
- goto err_image;
-
- resource = kmalloc(sizeof(*resource), GFP_KERNEL);
- if (!resource)
- goto err_alloc;
-
- resource->type = VME_SLAVE;
- resource->entry = &allocated_image->list;
-
- return resource;
-
-err_alloc:
- /* Unlock image */
- mutex_lock(&slave_image->mtx);
- slave_image->locked = 0;
- mutex_unlock(&slave_image->mtx);
-err_image:
-err_bus:
- return NULL;
-}
-EXPORT_SYMBOL(vme_slave_request);
-
-/**
- * vme_slave_set - Set VME slave window configuration.
- * @resource: Pointer to VME slave resource.
- * @enabled: State to which the window should be configured.
- * @vme_base: Base address for the window.
- * @size: Size of the VME window.
- * @buf_base: Based address of buffer used to provide VME slave window storage.
- * @aspace: VME address space for the VME window.
- * @cycle: VME data transfer cycle type for the VME window.
- *
- * Set configuration for provided VME slave window.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device, if an invalid resource has been provided or invalid
- * attributes are provided. Hardware specific errors may also be
- * returned.
- */
-int vme_slave_set(struct vme_resource *resource, int enabled,
- unsigned long long vme_base, unsigned long long size,
- dma_addr_t buf_base, u32 aspace, u32 cycle)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_slave_resource *image;
- int retval;
-
- if (resource->type != VME_SLAVE) {
- printk(KERN_ERR "Not a slave resource\n");
- return -EINVAL;
- }
-
- image = list_entry(resource->entry, struct vme_slave_resource, list);
-
- if (!bridge->slave_set) {
- printk(KERN_ERR "Function not supported\n");
- return -ENOSYS;
- }
-
- if (!(((image->address_attr & aspace) == aspace) &&
- ((image->cycle_attr & cycle) == cycle))) {
- printk(KERN_ERR "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);
-
-/**
- * vme_slave_get - Retrieve VME slave window configuration.
- * @resource: Pointer to VME slave resource.
- * @enabled: Pointer to variable for storing state.
- * @vme_base: Pointer to variable for storing window base address.
- * @size: Pointer to variable for storing window size.
- * @buf_base: Pointer to variable for storing slave buffer base address.
- * @aspace: Pointer to variable for storing VME address space.
- * @cycle: Pointer to variable for storing VME data transfer cycle type.
- *
- * Return configuration for provided VME slave window.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device or if an invalid resource has been provided.
- */
-int vme_slave_get(struct vme_resource *resource, int *enabled,
- unsigned long long *vme_base, unsigned long long *size,
- dma_addr_t *buf_base, u32 *aspace, u32 *cycle)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_slave_resource *image;
-
- if (resource->type != VME_SLAVE) {
- printk(KERN_ERR "Not a slave resource\n");
- return -EINVAL;
- }
-
- image = list_entry(resource->entry, struct vme_slave_resource, list);
-
- if (!bridge->slave_get) {
- printk(KERN_ERR "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);
-
-/**
- * vme_slave_free - Free VME slave window
- * @resource: Pointer to VME slave resource.
- *
- * Free the provided slave resource so that it may be reallocated.
- */
-void vme_slave_free(struct vme_resource *resource)
-{
- struct vme_slave_resource *slave_image;
-
- if (resource->type != VME_SLAVE) {
- printk(KERN_ERR "Not a slave resource\n");
- return;
- }
-
- slave_image = list_entry(resource->entry, struct vme_slave_resource,
- list);
- if (!slave_image) {
- printk(KERN_ERR "Can't find slave resource\n");
- return;
- }
-
- /* Unlock image */
- mutex_lock(&slave_image->mtx);
- if (slave_image->locked == 0)
- printk(KERN_ERR "Image is already free\n");
-
- slave_image->locked = 0;
- mutex_unlock(&slave_image->mtx);
-
- /* Free up resource memory */
- kfree(resource);
-}
-EXPORT_SYMBOL(vme_slave_free);
-
-/**
- * vme_master_request - Request a VME master window resource.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @address: Required VME address space.
- * @cycle: Required VME data transfer cycle type.
- * @dwidth: Required VME data transfer width.
- *
- * Request use of a VME window resource capable of being set for the requested
- * address space, data transfer cycle and width.
- *
- * Return: Pointer to VME resource on success, NULL on failure.
- */
-struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
- u32 cycle, u32 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 = vdev->bridge;
- if (!bridge) {
- 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) {
- 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) {
- printk(KERN_ERR "Can't find a suitable resource\n");
- goto err_image;
- }
-
- resource = kmalloc(sizeof(*resource), GFP_KERNEL);
- if (!resource)
- goto err_alloc;
-
- resource->type = VME_MASTER;
- resource->entry = &allocated_image->list;
-
- return 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);
-
-/**
- * vme_master_set - Set VME master window configuration.
- * @resource: Pointer to VME master resource.
- * @enabled: State to which the window should be configured.
- * @vme_base: Base address for the window.
- * @size: Size of the VME window.
- * @aspace: VME address space for the VME window.
- * @cycle: VME data transfer cycle type for the VME window.
- * @dwidth: VME data transfer width for the VME window.
- *
- * Set configuration for provided VME master window.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device, if an invalid resource has been provided or invalid
- * attributes are provided. Hardware specific errors may also be
- * returned.
- */
-int vme_master_set(struct vme_resource *resource, int enabled,
- unsigned long long vme_base, unsigned long long size, u32 aspace,
- u32 cycle, u32 dwidth)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_master_resource *image;
- int retval;
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "Not a master resource\n");
- return -EINVAL;
- }
-
- image = list_entry(resource->entry, struct vme_master_resource, list);
-
- if (!bridge->master_set) {
- printk(KERN_WARNING "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(KERN_WARNING "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);
-
-/**
- * vme_master_get - Retrieve VME master window configuration.
- * @resource: Pointer to VME master resource.
- * @enabled: Pointer to variable for storing state.
- * @vme_base: Pointer to variable for storing window base address.
- * @size: Pointer to variable for storing window size.
- * @aspace: Pointer to variable for storing VME address space.
- * @cycle: Pointer to variable for storing VME data transfer cycle type.
- * @dwidth: Pointer to variable for storing VME data transfer width.
- *
- * Return configuration for provided VME master window.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device or if an invalid resource has been provided.
- */
-int vme_master_get(struct vme_resource *resource, int *enabled,
- unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
- u32 *cycle, u32 *dwidth)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_master_resource *image;
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "Not a master resource\n");
- return -EINVAL;
- }
-
- image = list_entry(resource->entry, struct vme_master_resource, list);
-
- if (!bridge->master_get) {
- printk(KERN_WARNING "%s not supported\n", __func__);
- return -EINVAL;
- }
-
- return bridge->master_get(image, enabled, vme_base, size, aspace,
- cycle, dwidth);
-}
-EXPORT_SYMBOL(vme_master_get);
-
-/**
- * vme_master_read - Read data from VME space into a buffer.
- * @resource: Pointer to VME master resource.
- * @buf: Pointer to buffer where data should be transferred.
- * @count: Number of bytes to transfer.
- * @offset: Offset into VME master window at which to start transfer.
- *
- * Perform read of count bytes of data from location on VME bus which maps into
- * the VME master window at offset to buf.
- *
- * Return: Number of bytes read, -EINVAL if resource is not a VME master
- * resource or read operation is not supported. -EFAULT returned if
- * invalid offset is provided. Hardware specific errors may also be
- * returned.
- */
-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) {
- printk(KERN_WARNING "Reading from resource not supported\n");
- return -EINVAL;
- }
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "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(KERN_WARNING "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);
-
-/**
- * vme_master_write - Write data out to VME space from a buffer.
- * @resource: Pointer to VME master resource.
- * @buf: Pointer to buffer holding data to transfer.
- * @count: Number of bytes to transfer.
- * @offset: Offset into VME master window at which to start transfer.
- *
- * Perform write of count bytes of data from buf to location on VME bus which
- * maps into the VME master window at offset.
- *
- * Return: Number of bytes written, -EINVAL if resource is not a VME master
- * resource or write operation is not supported. -EFAULT returned if
- * invalid offset is provided. Hardware specific errors may also be
- * returned.
- */
-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) {
- printk(KERN_WARNING "Writing to resource not supported\n");
- return -EINVAL;
- }
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "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(KERN_WARNING "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);
-
-/**
- * vme_master_rmw - Perform read-modify-write cycle.
- * @resource: Pointer to VME master resource.
- * @mask: Bits to be compared and swapped in operation.
- * @compare: Bits to be compared with data read from offset.
- * @swap: Bits to be swapped in data read from offset.
- * @offset: Offset into VME master window at which to perform operation.
- *
- * Perform read-modify-write cycle on provided location:
- * - Location on VME bus is read.
- * - Bits selected by mask are compared with compare.
- * - Where a selected bit matches that in compare and are selected in swap,
- * the bit is swapped.
- * - Result written back to location on VME bus.
- *
- * Return: Bytes written on success, -EINVAL if resource is not a VME master
- * resource or RMW operation is not supported. Hardware specific
- * errors may also be returned.
- */
-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) {
- printk(KERN_WARNING "Writing to resource not supported\n");
- return -EINVAL;
- }
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "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);
-
-/**
- * vme_master_mmap - Mmap region of VME master window.
- * @resource: Pointer to VME master resource.
- * @vma: Pointer to definition of user mapping.
- *
- * Memory map a region of the VME master window into user space.
- *
- * Return: Zero on success, -EINVAL if resource is not a VME master
- * resource or -EFAULT if map exceeds window size. Other generic mmap
- * errors may also be returned.
- */
-int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
-{
- struct vme_master_resource *image;
- phys_addr_t phys_addr;
- unsigned long vma_size;
-
- if (resource->type != VME_MASTER) {
- pr_err("Not a master resource\n");
- return -EINVAL;
- }
-
- image = list_entry(resource->entry, struct vme_master_resource, list);
- phys_addr = image->bus_resource.start + (vma->vm_pgoff << PAGE_SHIFT);
- vma_size = vma->vm_end - vma->vm_start;
-
- if (phys_addr + vma_size > image->bus_resource.end + 1) {
- pr_err("Map size cannot exceed the window size\n");
- return -EFAULT;
- }
-
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- return vm_iomap_memory(vma, phys_addr, vma->vm_end - vma->vm_start);
-}
-EXPORT_SYMBOL(vme_master_mmap);
-
-/**
- * vme_master_free - Free VME master window
- * @resource: Pointer to VME master resource.
- *
- * Free the provided master resource so that it may be reallocated.
- */
-void vme_master_free(struct vme_resource *resource)
-{
- struct vme_master_resource *master_image;
-
- if (resource->type != VME_MASTER) {
- printk(KERN_ERR "Not a master resource\n");
- return;
- }
-
- master_image = list_entry(resource->entry, struct vme_master_resource,
- list);
- if (!master_image) {
- printk(KERN_ERR "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);
-
-/**
- * vme_dma_request - Request a DMA controller.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @route: Required src/destination combination.
- *
- * Request a VME DMA controller with capability to perform transfers bewteen
- * requested source/destination combination.
- *
- * Return: Pointer to VME DMA resource on success, NULL on failure.
- */
-struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
-{
- 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 = vdev->bridge;
- if (!bridge) {
- 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) {
- printk(KERN_ERR "Registered NULL DMA resource\n");
- continue;
- }
-
- /* Find an unlocked and compatible controller */
- mutex_lock(&dma_ctrlr->mtx);
- if (((dma_ctrlr->route_attr & route) == route) &&
- (dma_ctrlr->locked == 0)) {
-
- dma_ctrlr->locked = 1;
- mutex_unlock(&dma_ctrlr->mtx);
- allocated_ctrlr = dma_ctrlr;
- break;
- }
- mutex_unlock(&dma_ctrlr->mtx);
- }
-
- /* Check to see if we found a resource */
- if (!allocated_ctrlr)
- goto err_ctrlr;
-
- resource = kmalloc(sizeof(*resource), GFP_KERNEL);
- if (!resource)
- goto err_alloc;
-
- resource->type = VME_DMA;
- resource->entry = &allocated_ctrlr->list;
-
- return resource;
-
-err_alloc:
- /* Unlock image */
- mutex_lock(&dma_ctrlr->mtx);
- dma_ctrlr->locked = 0;
- mutex_unlock(&dma_ctrlr->mtx);
-err_ctrlr:
-err_bus:
- return NULL;
-}
-EXPORT_SYMBOL(vme_dma_request);
-
-/**
- * vme_new_dma_list - Create new VME DMA list.
- * @resource: Pointer to VME DMA resource.
- *
- * Create a new VME DMA list. It is the responsibility of the user to free
- * the list once it is no longer required with vme_dma_list_free().
- *
- * Return: Pointer to new VME DMA list, NULL on allocation failure or invalid
- * VME DMA resource.
- */
-struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
-{
- struct vme_dma_list *dma_list;
-
- if (resource->type != VME_DMA) {
- printk(KERN_ERR "Not a DMA resource\n");
- return NULL;
- }
-
- dma_list = kmalloc(sizeof(*dma_list), GFP_KERNEL);
- if (!dma_list)
- return NULL;
-
- INIT_LIST_HEAD(&dma_list->entries);
- dma_list->parent = list_entry(resource->entry,
- struct vme_dma_resource,
- list);
- mutex_init(&dma_list->mtx);
-
- return dma_list;
-}
-EXPORT_SYMBOL(vme_new_dma_list);
-
-/**
- * vme_dma_pattern_attribute - Create "Pattern" type VME DMA list attribute.
- * @pattern: Value to use used as pattern
- * @type: Type of pattern to be written.
- *
- * Create VME DMA list attribute for pattern generation. It is the
- * responsibility of the user to free used attributes using
- * vme_dma_free_attribute().
- *
- * Return: Pointer to VME DMA attribute, NULL on failure.
- */
-struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
-{
- struct vme_dma_attr *attributes;
- struct vme_dma_pattern *pattern_attr;
-
- attributes = kmalloc(sizeof(*attributes), GFP_KERNEL);
- if (!attributes)
- goto err_attr;
-
- pattern_attr = kmalloc(sizeof(*pattern_attr), GFP_KERNEL);
- if (!pattern_attr)
- goto err_pat;
-
- attributes->type = VME_DMA_PATTERN;
- attributes->private = (void *)pattern_attr;
-
- pattern_attr->pattern = pattern;
- pattern_attr->type = type;
-
- return attributes;
-
-err_pat:
- kfree(attributes);
-err_attr:
- return NULL;
-}
-EXPORT_SYMBOL(vme_dma_pattern_attribute);
-
-/**
- * vme_dma_pci_attribute - Create "PCI" type VME DMA list attribute.
- * @address: PCI base address for DMA transfer.
- *
- * Create VME DMA list attribute pointing to a location on PCI for DMA
- * transfers. It is the responsibility of the user to free used attributes
- * using vme_dma_free_attribute().
- *
- * Return: Pointer to VME DMA attribute, NULL on failure.
- */
-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 = kmalloc(sizeof(*attributes), GFP_KERNEL);
- if (!attributes)
- goto err_attr;
-
- pci_attr = kmalloc(sizeof(*pci_attr), GFP_KERNEL);
- if (!pci_attr)
- goto err_pci;
-
- attributes->type = VME_DMA_PCI;
- attributes->private = (void *)pci_attr;
-
- pci_attr->address = address;
-
- return attributes;
-
-err_pci:
- kfree(attributes);
-err_attr:
- return NULL;
-}
-EXPORT_SYMBOL(vme_dma_pci_attribute);
-
-/**
- * vme_dma_vme_attribute - Create "VME" type VME DMA list attribute.
- * @address: VME base address for DMA transfer.
- * @aspace: VME address space to use for DMA transfer.
- * @cycle: VME bus cycle to use for DMA transfer.
- * @dwidth: VME data width to use for DMA transfer.
- *
- * Create VME DMA list attribute pointing to a location on the VME bus for DMA
- * transfers. It is the responsibility of the user to free used attributes
- * using vme_dma_free_attribute().
- *
- * Return: Pointer to VME DMA attribute, NULL on failure.
- */
-struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
- u32 aspace, u32 cycle, u32 dwidth)
-{
- struct vme_dma_attr *attributes;
- struct vme_dma_vme *vme_attr;
-
- attributes = kmalloc(sizeof(*attributes), GFP_KERNEL);
- if (!attributes)
- goto err_attr;
-
- vme_attr = kmalloc(sizeof(*vme_attr), GFP_KERNEL);
- if (!vme_attr)
- 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;
-
-err_vme:
- kfree(attributes);
-err_attr:
- return NULL;
-}
-EXPORT_SYMBOL(vme_dma_vme_attribute);
-
-/**
- * vme_dma_free_attribute - Free DMA list attribute.
- * @attributes: Pointer to DMA list attribute.
- *
- * Free VME DMA list attribute. VME DMA list attributes can be safely freed
- * once vme_dma_list_add() has returned.
- */
-void vme_dma_free_attribute(struct vme_dma_attr *attributes)
-{
- kfree(attributes->private);
- kfree(attributes);
-}
-EXPORT_SYMBOL(vme_dma_free_attribute);
-
-/**
- * vme_dma_list_add - Add enty to a VME DMA list.
- * @list: Pointer to VME list.
- * @src: Pointer to DMA list attribute to use as source.
- * @dest: Pointer to DMA list attribute to use as destination.
- * @count: Number of bytes to transfer.
- *
- * Add an entry to the provided VME DMA list. Entry requires pointers to source
- * and destination DMA attributes and a count.
- *
- * Please note, the attributes supported as source and destinations for
- * transfers are hardware dependent.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device or if the link list has already been submitted for execution.
- * Hardware specific errors also possible.
- */
-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) {
- printk(KERN_WARNING "Link List DMA generation not supported\n");
- return -EINVAL;
- }
-
- if (!mutex_trylock(&list->mtx)) {
- printk(KERN_ERR "Link List already submitted\n");
- return -EINVAL;
- }
-
- retval = bridge->dma_list_add(list, src, dest, count);
-
- mutex_unlock(&list->mtx);
-
- return retval;
-}
-EXPORT_SYMBOL(vme_dma_list_add);
-
-/**
- * vme_dma_list_exec - Queue a VME DMA list for execution.
- * @list: Pointer to VME list.
- *
- * Queue the provided VME DMA list for execution. The call will return once the
- * list has been executed.
- *
- * Return: Zero on success, -EINVAL if operation is not supported on this
- * device. Hardware specific errors also possible.
- */
-int vme_dma_list_exec(struct vme_dma_list *list)
-{
- struct vme_bridge *bridge = list->parent->parent;
- int retval;
-
- if (!bridge->dma_list_exec) {
- printk(KERN_ERR "Link List DMA execution not supported\n");
- return -EINVAL;
- }
-
- mutex_lock(&list->mtx);
-
- retval = bridge->dma_list_exec(list);
-
- mutex_unlock(&list->mtx);
-
- return retval;
-}
-EXPORT_SYMBOL(vme_dma_list_exec);
-
-/**
- * vme_dma_list_free - Free a VME DMA list.
- * @list: Pointer to VME list.
- *
- * Free the provided DMA list and all its entries.
- *
- * Return: Zero on success, -EINVAL on invalid VME resource, -EBUSY if resource
- * is still in use. Hardware specific errors also possible.
- */
-int vme_dma_list_free(struct vme_dma_list *list)
-{
- struct vme_bridge *bridge = list->parent->parent;
- int retval;
-
- if (!bridge->dma_list_empty) {
- printk(KERN_WARNING "Emptying of Link Lists not supported\n");
- return -EINVAL;
- }
-
- if (!mutex_trylock(&list->mtx)) {
- printk(KERN_ERR "Link List in use\n");
- return -EBUSY;
- }
-
- /*
- * 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(KERN_ERR "Unable to empty link-list entries\n");
- mutex_unlock(&list->mtx);
- return retval;
- }
- mutex_unlock(&list->mtx);
- kfree(list);
-
- return retval;
-}
-EXPORT_SYMBOL(vme_dma_list_free);
-
-/**
- * vme_dma_free - Free a VME DMA resource.
- * @resource: Pointer to VME DMA resource.
- *
- * Free the provided DMA resource so that it may be reallocated.
- *
- * Return: Zero on success, -EINVAL on invalid VME resource, -EBUSY if resource
- * is still active.
- */
-int vme_dma_free(struct vme_resource *resource)
-{
- struct vme_dma_resource *ctrlr;
-
- if (resource->type != VME_DMA) {
- printk(KERN_ERR "Not a DMA resource\n");
- return -EINVAL;
- }
-
- ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
-
- if (!mutex_trylock(&ctrlr->mtx)) {
- printk(KERN_ERR "Resource busy, can't free\n");
- return -EBUSY;
- }
-
- if (!(list_empty(&ctrlr->pending) && list_empty(&ctrlr->running))) {
- printk(KERN_WARNING "Resource still processing transfers\n");
- mutex_unlock(&ctrlr->mtx);
- return -EBUSY;
- }
-
- ctrlr->locked = 0;
-
- mutex_unlock(&ctrlr->mtx);
-
- kfree(resource);
-
- return 0;
-}
-EXPORT_SYMBOL(vme_dma_free);
-
-void vme_bus_error_handler(struct vme_bridge *bridge,
- unsigned long long address, int am)
-{
- struct list_head *handler_pos = NULL;
- struct vme_error_handler *handler;
- int handler_triggered = 0;
- u32 aspace = vme_get_aspace(am);
-
- list_for_each(handler_pos, &bridge->vme_error_handlers) {
- handler = list_entry(handler_pos, struct vme_error_handler,
- list);
- if ((aspace == handler->aspace) &&
- (address >= handler->start) &&
- (address < handler->end)) {
- if (!handler->num_errors)
- handler->first_error = address;
- if (handler->num_errors != UINT_MAX)
- handler->num_errors++;
- handler_triggered = 1;
- }
- }
-
- if (!handler_triggered)
- dev_err(bridge->parent,
- "Unhandled VME access error at address 0x%llx\n",
- address);
-}
-EXPORT_SYMBOL(vme_bus_error_handler);
-
-struct vme_error_handler *vme_register_error_handler(
- struct vme_bridge *bridge, u32 aspace,
- unsigned long long address, size_t len)
-{
- struct vme_error_handler *handler;
-
- handler = kmalloc(sizeof(*handler), GFP_ATOMIC);
- if (!handler)
- return NULL;
-
- handler->aspace = aspace;
- handler->start = address;
- handler->end = address + len;
- handler->num_errors = 0;
- handler->first_error = 0;
- list_add_tail(&handler->list, &bridge->vme_error_handlers);
-
- return handler;
-}
-EXPORT_SYMBOL(vme_register_error_handler);
-
-void vme_unregister_error_handler(struct vme_error_handler *handler)
-{
- list_del(&handler->list);
- kfree(handler);
-}
-EXPORT_SYMBOL(vme_unregister_error_handler);
-
-void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
-{
- void (*call)(int, int, void *);
- void *priv_data;
-
- call = bridge->irq[level - 1].callback[statid].func;
- priv_data = bridge->irq[level - 1].callback[statid].priv_data;
- if (call)
- call(level, statid, priv_data);
- else
- printk(KERN_WARNING "Spurious VME interrupt, level:%x, vector:%x\n",
- level, statid);
-}
-EXPORT_SYMBOL(vme_irq_handler);
-
-/**
- * vme_irq_request - Request a specific VME interrupt.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @level: Interrupt priority being requested.
- * @statid: Interrupt vector being requested.
- * @callback: Pointer to callback function called when VME interrupt/vector
- * received.
- * @priv_data: Generic pointer that will be passed to the callback function.
- *
- * Request callback to be attached as a handler for VME interrupts with provided
- * level and statid.
- *
- * Return: Zero on success, -EINVAL on invalid vme device, level or if the
- * function is not supported, -EBUSY if the level/statid combination is
- * already in use. Hardware specific errors also possible.
- */
-int vme_irq_request(struct vme_dev *vdev, int level, int statid,
- void (*callback)(int, int, void *),
- void *priv_data)
-{
- struct vme_bridge *bridge;
-
- bridge = vdev->bridge;
- if (!bridge) {
- printk(KERN_ERR "Can't find VME bus\n");
- return -EINVAL;
- }
-
- if ((level < 1) || (level > 7)) {
- printk(KERN_ERR "Invalid interrupt level\n");
- return -EINVAL;
- }
-
- if (!bridge->irq_set) {
- printk(KERN_ERR "Configuring interrupts not supported\n");
- return -EINVAL;
- }
-
- mutex_lock(&bridge->irq_mtx);
-
- if (bridge->irq[level - 1].callback[statid].func) {
- mutex_unlock(&bridge->irq_mtx);
- printk(KERN_WARNING "VME Interrupt already taken\n");
- return -EBUSY;
- }
-
- bridge->irq[level - 1].count++;
- bridge->irq[level - 1].callback[statid].priv_data = priv_data;
- bridge->irq[level - 1].callback[statid].func = callback;
-
- /* Enable IRQ level */
- bridge->irq_set(bridge, level, 1, 1);
-
- mutex_unlock(&bridge->irq_mtx);
-
- return 0;
-}
-EXPORT_SYMBOL(vme_irq_request);
-
-/**
- * vme_irq_free - Free a VME interrupt.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @level: Interrupt priority of interrupt being freed.
- * @statid: Interrupt vector of interrupt being freed.
- *
- * Remove previously attached callback from VME interrupt priority/vector.
- */
-void vme_irq_free(struct vme_dev *vdev, int level, int statid)
-{
- struct vme_bridge *bridge;
-
- bridge = vdev->bridge;
- if (!bridge) {
- printk(KERN_ERR "Can't find VME bus\n");
- return;
- }
-
- if ((level < 1) || (level > 7)) {
- printk(KERN_ERR "Invalid interrupt level\n");
- return;
- }
-
- if (!bridge->irq_set) {
- printk(KERN_ERR "Configuring interrupts not supported\n");
- return;
- }
-
- mutex_lock(&bridge->irq_mtx);
-
- bridge->irq[level - 1].count--;
-
- /* Disable IRQ level if no more interrupts attached at this level*/
- if (bridge->irq[level - 1].count == 0)
- bridge->irq_set(bridge, level, 0, 1);
-
- bridge->irq[level - 1].callback[statid].func = NULL;
- bridge->irq[level - 1].callback[statid].priv_data = NULL;
-
- mutex_unlock(&bridge->irq_mtx);
-}
-EXPORT_SYMBOL(vme_irq_free);
-
-/**
- * vme_irq_generate - Generate VME interrupt.
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- * @level: Interrupt priority at which to assert the interrupt.
- * @statid: Interrupt vector to associate with the interrupt.
- *
- * Generate a VME interrupt of the provided level and with the provided
- * statid.
- *
- * Return: Zero on success, -EINVAL on invalid vme device, level or if the
- * function is not supported. Hardware specific errors also possible.
- */
-int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
-{
- struct vme_bridge *bridge;
-
- bridge = vdev->bridge;
- if (!bridge) {
- 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->irq_generate) {
- printk(KERN_WARNING "Interrupt generation not supported\n");
- return -EINVAL;
- }
-
- return bridge->irq_generate(bridge, level, statid);
-}
-EXPORT_SYMBOL(vme_irq_generate);
-
-/**
- * vme_lm_request - Request a VME location monitor
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- *
- * Allocate a location monitor resource to the driver. A location monitor
- * allows the driver to monitor accesses to a contiguous number of
- * addresses on the VME bus.
- *
- * Return: Pointer to a VME resource on success or NULL on failure.
- */
-struct vme_resource *vme_lm_request(struct vme_dev *vdev)
-{
- struct vme_bridge *bridge;
- struct list_head *lm_pos = NULL;
- struct vme_lm_resource *allocated_lm = NULL;
- struct vme_lm_resource *lm = NULL;
- struct vme_resource *resource = NULL;
-
- bridge = vdev->bridge;
- if (!bridge) {
- printk(KERN_ERR "Can't find VME bus\n");
- goto err_bus;
- }
-
- /* Loop through LM resources */
- list_for_each(lm_pos, &bridge->lm_resources) {
- lm = list_entry(lm_pos,
- struct vme_lm_resource, list);
- if (!lm) {
- printk(KERN_ERR "Registered NULL Location Monitor resource\n");
- continue;
- }
-
- /* Find an unlocked controller */
- mutex_lock(&lm->mtx);
- if (lm->locked == 0) {
- lm->locked = 1;
- mutex_unlock(&lm->mtx);
- allocated_lm = lm;
- break;
- }
- mutex_unlock(&lm->mtx);
- }
-
- /* Check to see if we found a resource */
- if (!allocated_lm)
- goto err_lm;
-
- resource = kmalloc(sizeof(*resource), GFP_KERNEL);
- if (!resource)
- goto err_alloc;
-
- resource->type = VME_LM;
- resource->entry = &allocated_lm->list;
-
- return resource;
-
-err_alloc:
- /* Unlock image */
- mutex_lock(&lm->mtx);
- lm->locked = 0;
- mutex_unlock(&lm->mtx);
-err_lm:
-err_bus:
- return NULL;
-}
-EXPORT_SYMBOL(vme_lm_request);
-
-/**
- * vme_lm_count - Determine number of VME Addresses monitored
- * @resource: Pointer to VME location monitor resource.
- *
- * The number of contiguous addresses monitored is hardware dependent.
- * Return the number of contiguous addresses monitored by the
- * location monitor.
- *
- * Return: Count of addresses monitored or -EINVAL when provided with an
- * invalid location monitor resource.
- */
-int vme_lm_count(struct vme_resource *resource)
-{
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return -EINVAL;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- return lm->monitors;
-}
-EXPORT_SYMBOL(vme_lm_count);
-
-/**
- * vme_lm_set - Configure location monitor
- * @resource: Pointer to VME location monitor resource.
- * @lm_base: Base address to monitor.
- * @aspace: VME address space to monitor.
- * @cycle: VME bus cycle type to monitor.
- *
- * Set the base address, address space and cycle type of accesses to be
- * monitored by the location monitor.
- *
- * Return: Zero on success, -EINVAL when provided with an invalid location
- * monitor resource or function is not supported. Hardware specific
- * errors may also be returned.
- */
-int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
- u32 aspace, u32 cycle)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return -EINVAL;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- if (!bridge->lm_set) {
- printk(KERN_ERR "vme_lm_set not supported\n");
- return -EINVAL;
- }
-
- return bridge->lm_set(lm, lm_base, aspace, cycle);
-}
-EXPORT_SYMBOL(vme_lm_set);
-
-/**
- * vme_lm_get - Retrieve location monitor settings
- * @resource: Pointer to VME location monitor resource.
- * @lm_base: Pointer used to output the base address monitored.
- * @aspace: Pointer used to output the address space monitored.
- * @cycle: Pointer used to output the VME bus cycle type monitored.
- *
- * Retrieve the base address, address space and cycle type of accesses to
- * be monitored by the location monitor.
- *
- * Return: Zero on success, -EINVAL when provided with an invalid location
- * monitor resource or function is not supported. Hardware specific
- * errors may also be returned.
- */
-int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
- u32 *aspace, u32 *cycle)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return -EINVAL;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- if (!bridge->lm_get) {
- printk(KERN_ERR "vme_lm_get not supported\n");
- return -EINVAL;
- }
-
- return bridge->lm_get(lm, lm_base, aspace, cycle);
-}
-EXPORT_SYMBOL(vme_lm_get);
-
-/**
- * vme_lm_attach - Provide callback for location monitor address
- * @resource: Pointer to VME location monitor resource.
- * @monitor: Offset to which callback should be attached.
- * @callback: Pointer to callback function called when triggered.
- * @data: Generic pointer that will be passed to the callback function.
- *
- * Attach a callback to the specificed offset into the location monitors
- * monitored addresses. A generic pointer is provided to allow data to be
- * passed to the callback when called.
- *
- * Return: Zero on success, -EINVAL when provided with an invalid location
- * monitor resource or function is not supported. Hardware specific
- * errors may also be returned.
- */
-int vme_lm_attach(struct vme_resource *resource, int monitor,
- void (*callback)(void *), void *data)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return -EINVAL;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- if (!bridge->lm_attach) {
- printk(KERN_ERR "vme_lm_attach not supported\n");
- return -EINVAL;
- }
-
- return bridge->lm_attach(lm, monitor, callback, data);
-}
-EXPORT_SYMBOL(vme_lm_attach);
-
-/**
- * vme_lm_detach - Remove callback for location monitor address
- * @resource: Pointer to VME location monitor resource.
- * @monitor: Offset to which callback should be removed.
- *
- * Remove the callback associated with the specificed offset into the
- * location monitors monitored addresses.
- *
- * Return: Zero on success, -EINVAL when provided with an invalid location
- * monitor resource or function is not supported. Hardware specific
- * errors may also be returned.
- */
-int vme_lm_detach(struct vme_resource *resource, int monitor)
-{
- struct vme_bridge *bridge = find_bridge(resource);
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return -EINVAL;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- if (!bridge->lm_detach) {
- printk(KERN_ERR "vme_lm_detach not supported\n");
- return -EINVAL;
- }
-
- return bridge->lm_detach(lm, monitor);
-}
-EXPORT_SYMBOL(vme_lm_detach);
-
-/**
- * vme_lm_free - Free allocated VME location monitor
- * @resource: Pointer to VME location monitor resource.
- *
- * Free allocation of a VME location monitor.
- *
- * WARNING: This function currently expects that any callbacks that have
- * been attached to the location monitor have been removed.
- *
- * Return: Zero on success, -EINVAL when provided with an invalid location
- * monitor resource.
- */
-void vme_lm_free(struct vme_resource *resource)
-{
- struct vme_lm_resource *lm;
-
- if (resource->type != VME_LM) {
- printk(KERN_ERR "Not a Location Monitor resource\n");
- return;
- }
-
- lm = list_entry(resource->entry, struct vme_lm_resource, list);
-
- mutex_lock(&lm->mtx);
-
- /* XXX
- * Check to see that there aren't any callbacks still attached, if
- * there are we should probably be detaching them!
- */
-
- lm->locked = 0;
-
- mutex_unlock(&lm->mtx);
-
- kfree(resource);
-}
-EXPORT_SYMBOL(vme_lm_free);
-
-/**
- * vme_slot_num - Retrieve slot ID
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- *
- * Retrieve the slot ID associated with the provided VME device.
- *
- * Return: The slot ID on success, -EINVAL if VME bridge cannot be determined
- * or the function is not supported. Hardware specific errors may also
- * be returned.
- */
-int vme_slot_num(struct vme_dev *vdev)
-{
- struct vme_bridge *bridge;
-
- bridge = vdev->bridge;
- if (!bridge) {
- printk(KERN_ERR "Can't find VME bus\n");
- return -EINVAL;
- }
-
- if (!bridge->slot_get) {
- printk(KERN_WARNING "vme_slot_num not supported\n");
- return -EINVAL;
- }
-
- return bridge->slot_get(bridge);
-}
-EXPORT_SYMBOL(vme_slot_num);
-
-/**
- * vme_bus_num - Retrieve bus number
- * @vdev: Pointer to VME device struct vme_dev assigned to driver instance.
- *
- * Retrieve the bus enumeration associated with the provided VME device.
- *
- * Return: The bus number on success, -EINVAL if VME bridge cannot be
- * determined.
- */
-int vme_bus_num(struct vme_dev *vdev)
-{
- struct vme_bridge *bridge;
-
- bridge = vdev->bridge;
- if (!bridge) {
- pr_err("Can't find VME bus\n");
- return -EINVAL;
- }
-
- return bridge->num;
-}
-EXPORT_SYMBOL(vme_bus_num);
-
-/* - Bridge Registration --------------------------------------------------- */
-
-static void vme_dev_release(struct device *dev)
-{
- kfree(dev_to_vme_dev(dev));
-}
-
-/* Common bridge initialization */
-struct vme_bridge *vme_init_bridge(struct vme_bridge *bridge)
-{
- INIT_LIST_HEAD(&bridge->vme_error_handlers);
- INIT_LIST_HEAD(&bridge->master_resources);
- INIT_LIST_HEAD(&bridge->slave_resources);
- INIT_LIST_HEAD(&bridge->dma_resources);
- INIT_LIST_HEAD(&bridge->lm_resources);
- mutex_init(&bridge->irq_mtx);
-
- return bridge;
-}
-EXPORT_SYMBOL(vme_init_bridge);
-
-int vme_register_bridge(struct vme_bridge *bridge)
-{
- int i;
- int ret = -1;
-
- mutex_lock(&vme_buses_lock);
- for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) {
- if ((vme_bus_numbers & (1 << i)) == 0) {
- vme_bus_numbers |= (1 << i);
- bridge->num = i;
- INIT_LIST_HEAD(&bridge->devices);
- list_add_tail(&bridge->bus_list, &vme_bus_list);
- ret = 0;
- break;
- }
- }
- mutex_unlock(&vme_buses_lock);
-
- return ret;
-}
-EXPORT_SYMBOL(vme_register_bridge);
-
-void vme_unregister_bridge(struct vme_bridge *bridge)
-{
- struct vme_dev *vdev;
- struct vme_dev *tmp;
-
- mutex_lock(&vme_buses_lock);
- vme_bus_numbers &= ~(1 << bridge->num);
- list_for_each_entry_safe(vdev, tmp, &bridge->devices, bridge_list) {
- list_del(&vdev->drv_list);
- list_del(&vdev->bridge_list);
- device_unregister(&vdev->dev);
- }
- list_del(&bridge->bus_list);
- mutex_unlock(&vme_buses_lock);
-}
-EXPORT_SYMBOL(vme_unregister_bridge);
-
-/* - Driver Registration --------------------------------------------------- */
-
-static int __vme_register_driver_bus(struct vme_driver *drv,
- struct vme_bridge *bridge, unsigned int ndevs)
-{
- int err;
- unsigned int i;
- struct vme_dev *vdev;
- struct vme_dev *tmp;
-
- for (i = 0; i < ndevs; i++) {
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev) {
- err = -ENOMEM;
- goto err_devalloc;
- }
- vdev->num = i;
- vdev->bridge = bridge;
- vdev->dev.platform_data = drv;
- vdev->dev.release = vme_dev_release;
- vdev->dev.parent = bridge->parent;
- vdev->dev.bus = &vme_bus_type;
- dev_set_name(&vdev->dev, "%s.%u-%u", drv->name, bridge->num,
- vdev->num);
-
- err = device_register(&vdev->dev);
- if (err)
- goto err_reg;
-
- if (vdev->dev.platform_data) {
- list_add_tail(&vdev->drv_list, &drv->devices);
- list_add_tail(&vdev->bridge_list, &bridge->devices);
- } else
- device_unregister(&vdev->dev);
- }
- return 0;
-
-err_reg:
- put_device(&vdev->dev);
-err_devalloc:
- list_for_each_entry_safe(vdev, tmp, &drv->devices, drv_list) {
- list_del(&vdev->drv_list);
- list_del(&vdev->bridge_list);
- device_unregister(&vdev->dev);
- }
- return err;
-}
-
-static int __vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
-{
- struct vme_bridge *bridge;
- int err = 0;
-
- mutex_lock(&vme_buses_lock);
- list_for_each_entry(bridge, &vme_bus_list, bus_list) {
- /*
- * This cannot cause trouble as we already have vme_buses_lock
- * and if the bridge is removed, it will have to go through
- * vme_unregister_bridge() to do it (which calls remove() on
- * the bridge which in turn tries to acquire vme_buses_lock and
- * will have to wait).
- */
- err = __vme_register_driver_bus(drv, bridge, ndevs);
- if (err)
- break;
- }
- mutex_unlock(&vme_buses_lock);
- return err;
-}
-
-/**
- * vme_register_driver - Register a VME driver
- * @drv: Pointer to VME driver structure to register.
- * @ndevs: Maximum number of devices to allow to be enumerated.
- *
- * Register a VME device driver with the VME subsystem.
- *
- * Return: Zero on success, error value on registration failure.
- */
-int vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
-{
- int err;
-
- drv->driver.name = drv->name;
- drv->driver.bus = &vme_bus_type;
- INIT_LIST_HEAD(&drv->devices);
-
- err = driver_register(&drv->driver);
- if (err)
- return err;
-
- err = __vme_register_driver(drv, ndevs);
- if (err)
- driver_unregister(&drv->driver);
-
- return err;
-}
-EXPORT_SYMBOL(vme_register_driver);
-
-/**
- * vme_unregister_driver - Unregister a VME driver
- * @drv: Pointer to VME driver structure to unregister.
- *
- * Unregister a VME device driver from the VME subsystem.
- */
-void vme_unregister_driver(struct vme_driver *drv)
-{
- struct vme_dev *dev, *dev_tmp;
-
- mutex_lock(&vme_buses_lock);
- list_for_each_entry_safe(dev, dev_tmp, &drv->devices, drv_list) {
- list_del(&dev->drv_list);
- list_del(&dev->bridge_list);
- device_unregister(&dev->dev);
- }
- mutex_unlock(&vme_buses_lock);
-
- driver_unregister(&drv->driver);
-}
-EXPORT_SYMBOL(vme_unregister_driver);
-
-/* - Bus Registration ------------------------------------------------------ */
-
-static int vme_bus_match(struct device *dev, struct device_driver *drv)
-{
- struct vme_driver *vme_drv;
-
- vme_drv = container_of(drv, struct vme_driver, driver);
-
- if (dev->platform_data == vme_drv) {
- struct vme_dev *vdev = dev_to_vme_dev(dev);
-
- if (vme_drv->match && vme_drv->match(vdev))
- return 1;
-
- dev->platform_data = NULL;
- }
- return 0;
-}
-
-static int vme_bus_probe(struct device *dev)
-{
- struct vme_driver *driver;
- struct vme_dev *vdev = dev_to_vme_dev(dev);
-
- driver = dev->platform_data;
- if (driver->probe)
- return driver->probe(vdev);
-
- return -ENODEV;
-}
-
-static void vme_bus_remove(struct device *dev)
-{
- struct vme_driver *driver;
- struct vme_dev *vdev = dev_to_vme_dev(dev);
-
- driver = dev->platform_data;
- if (driver->remove)
- driver->remove(vdev);
-}
-
-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);
-}
-subsys_initcall(vme_init);
projects / linux-2.6-microblaze.git / blobdiff