staging: vme: add struct vme_dev for VME devices
Instead of using a vanilla 'struct device' for VME devices, add new
'struct vme_dev'. Modifications have been made to the VME framework
API as well as all in-tree VME drivers.
The new vme_dev structure has the following advantages from the
current model used by the driver:
* Driver functions (probe, remove) now receive a VME device
instead of a pointer to the bridge device (cleaner design)
* It's easier to differenciate API calls as bridge-based or
device-based (ie. cleaner interface).
Signed-off-by: Manohar Vanga <manohar.vanga@cern.ch>
Cc: Martyn Welch <martyn.welch@ge.com>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Manohar Vanga
Greg Kroah-Hartman
parent
9ad2e2e1d6
commit
8f966dc444
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@ -116,7 +116,7 @@ static struct driver_stats statistics;
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static struct cdev *vme_user_cdev; /* Character device */
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static struct class *vme_user_sysfs_class; /* Sysfs class */
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static struct device *vme_user_bridge; /* Pointer to bridge device */
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static struct vme_dev *vme_user_bridge; /* Pointer to user device */
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static const int type[VME_DEVS] = { MASTER_MINOR, MASTER_MINOR,
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@ -135,8 +135,8 @@ static ssize_t vme_user_write(struct file *, const char __user *, size_t,
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static loff_t vme_user_llseek(struct file *, loff_t, int);
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static long vme_user_unlocked_ioctl(struct file *, unsigned int, unsigned long);
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static int __devinit vme_user_probe(struct device *, int, int);
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static int __devexit vme_user_remove(struct device *, int, int);
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static int __devinit vme_user_probe(struct vme_dev *);
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static int __devexit vme_user_remove(struct vme_dev *);
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static const struct file_operations vme_user_fops = {
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.open = vme_user_open,
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@ -689,8 +689,7 @@ err_nocard:
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* as practical. We will therefore reserve the buffers and request the images
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* here so that we don't have to do it later.
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*/
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static int __devinit vme_user_probe(struct device *dev, int cur_bus,
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int cur_slot)
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static int __devinit vme_user_probe(struct vme_dev *vdev)
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{
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int i, err;
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char name[12];
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@ -702,7 +701,7 @@ static int __devinit vme_user_probe(struct device *dev, int cur_bus,
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err = -EINVAL;
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goto err_dev;
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}
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vme_user_bridge = dev;
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vme_user_bridge = vdev;
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/* Initialise descriptors */
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for (i = 0; i < VME_DEVS; i++) {
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@ -865,8 +864,7 @@ err_dev:
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return err;
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}
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static int __devexit vme_user_remove(struct device *dev, int cur_bus,
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int cur_slot)
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static int __devexit vme_user_remove(struct vme_dev *dev)
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{
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int i;
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@ -42,13 +42,9 @@ static DEFINE_MUTEX(vme_buses_lock);
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static void __exit vme_exit(void);
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static int __init vme_init(void);
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/*
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* Find the bridge resource associated with a specific device resource
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*/
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static struct vme_bridge *dev_to_bridge(struct device *dev)
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static struct vme_dev *dev_to_vme_dev(struct device *dev)
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{
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return dev->platform_data;
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return container_of(dev, struct vme_dev, dev);
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}
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/*
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@ -236,7 +232,7 @@ static int vme_check_window(vme_address_t aspace, unsigned long long vme_base,
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* Request a slave image with specific attributes, return some unique
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* identifier.
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*/
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struct vme_resource *vme_slave_request(struct device *dev,
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struct vme_resource *vme_slave_request(struct vme_dev *vdev,
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vme_address_t address, vme_cycle_t cycle)
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{
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struct vme_bridge *bridge;
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@ -245,7 +241,7 @@ struct vme_resource *vme_slave_request(struct device *dev,
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struct vme_slave_resource *slave_image = NULL;
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struct vme_resource *resource = NULL;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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@ -392,7 +388,7 @@ EXPORT_SYMBOL(vme_slave_free);
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* Request a master image with specific attributes, return some unique
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* identifier.
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*/
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struct vme_resource *vme_master_request(struct device *dev,
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struct vme_resource *vme_master_request(struct vme_dev *vdev,
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vme_address_t address, vme_cycle_t cycle, vme_width_t dwidth)
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{
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struct vme_bridge *bridge;
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@ -401,7 +397,7 @@ struct vme_resource *vme_master_request(struct device *dev,
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struct vme_master_resource *master_image = NULL;
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struct vme_resource *resource = NULL;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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@ -650,7 +646,8 @@ EXPORT_SYMBOL(vme_master_free);
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* Request a DMA controller with specific attributes, return some unique
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* identifier.
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*/
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struct vme_resource *vme_dma_request(struct device *dev, vme_dma_route_t route)
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struct vme_resource *vme_dma_request(struct vme_dev *vdev,
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vme_dma_route_t route)
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{
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struct vme_bridge *bridge;
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struct list_head *dma_pos = NULL;
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@ -661,7 +658,7 @@ struct vme_resource *vme_dma_request(struct device *dev, vme_dma_route_t route)
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/* XXX Not checking resource attributes */
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printk(KERN_ERR "No VME resource Attribute tests done\n");
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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@ -994,13 +991,13 @@ void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
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}
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EXPORT_SYMBOL(vme_irq_handler);
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int vme_irq_request(struct device *dev, int level, int statid,
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int vme_irq_request(struct vme_dev *vdev, int level, int statid,
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void (*callback)(int, int, void *),
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void *priv_data)
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{
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struct vme_bridge *bridge;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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return -EINVAL;
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@ -1037,11 +1034,11 @@ int vme_irq_request(struct device *dev, int level, int statid,
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}
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EXPORT_SYMBOL(vme_irq_request);
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void vme_irq_free(struct device *dev, int level, int statid)
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void vme_irq_free(struct vme_dev *vdev, int level, int statid)
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{
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struct vme_bridge *bridge;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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return;
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@ -1072,11 +1069,11 @@ void vme_irq_free(struct device *dev, int level, int statid)
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}
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EXPORT_SYMBOL(vme_irq_free);
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int vme_irq_generate(struct device *dev, int level, int statid)
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int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
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{
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struct vme_bridge *bridge;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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return -EINVAL;
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@ -1099,7 +1096,7 @@ EXPORT_SYMBOL(vme_irq_generate);
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/*
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* Request the location monitor, return resource or NULL
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*/
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struct vme_resource *vme_lm_request(struct device *dev)
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struct vme_resource *vme_lm_request(struct vme_dev *vdev)
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{
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struct vme_bridge *bridge;
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struct list_head *lm_pos = NULL;
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@ -1107,7 +1104,7 @@ struct vme_resource *vme_lm_request(struct device *dev)
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struct vme_lm_resource *lm = NULL;
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struct vme_resource *resource = NULL;
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bridge = dev_to_bridge(dev);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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@ -1288,11 +1285,11 @@ void vme_lm_free(struct vme_resource *resource)
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}
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EXPORT_SYMBOL(vme_lm_free);
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int vme_slot_get(struct device *bus)
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int vme_slot_get(struct vme_dev *vdev)
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{
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struct vme_bridge *bridge;
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bridge = dev_to_bridge(bus);
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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return -EINVAL;
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@ -1340,12 +1337,12 @@ static void vme_remove_bus(struct vme_bridge *bridge)
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static void vme_dev_release(struct device *dev)
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{
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kfree(dev);
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kfree(dev_to_vme_dev(dev));
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}
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int vme_register_bridge(struct vme_bridge *bridge)
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{
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struct device *dev;
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struct vme_dev *vdev;
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int retval;
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int i;
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@ -1358,26 +1355,29 @@ int vme_register_bridge(struct vme_bridge *bridge)
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* specification.
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*/
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for (i = 0; i < VME_SLOTS_MAX; i++) {
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bridge->dev[i] = kzalloc(sizeof(struct device), GFP_KERNEL);
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bridge->dev[i] = kzalloc(sizeof(struct vme_dev), GFP_KERNEL);
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if (!bridge->dev[i]) {
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retval = -ENOMEM;
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goto err_devalloc;
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}
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dev = bridge->dev[i];
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memset(dev, 0, sizeof(struct device));
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vdev = bridge->dev[i];
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memset(vdev, 0, sizeof(struct vme_dev));
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dev->parent = bridge->parent;
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dev->bus = &vme_bus_type;
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dev->release = vme_dev_release;
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vdev->id.bus = bridge->num;
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vdev->id.slot = i + 1;
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vdev->bridge = bridge;
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vdev->dev.parent = bridge->parent;
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vdev->dev.bus = &vme_bus_type;
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vdev->dev.release = vme_dev_release;
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/*
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* We save a pointer to the bridge in platform_data so that we
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* can get to it later. We keep driver_data for use by the
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* driver that binds against the slot
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*/
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dev->platform_data = bridge;
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dev_set_name(dev, "vme-%x.%x", bridge->num, i + 1);
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vdev->dev.platform_data = bridge;
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dev_set_name(&vdev->dev, "vme-%x.%x", bridge->num, i + 1);
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retval = device_register(dev);
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retval = device_register(&vdev->dev);
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if (retval)
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goto err_reg;
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}
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@ -1385,11 +1385,11 @@ int vme_register_bridge(struct vme_bridge *bridge)
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return retval;
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err_reg:
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kfree(dev);
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kfree(vdev);
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err_devalloc:
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while (--i >= 0) {
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dev = bridge->dev[i];
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device_unregister(dev);
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vdev = bridge->dev[i];
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device_unregister(&vdev->dev);
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}
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vme_remove_bus(bridge);
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return retval;
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@ -1399,12 +1399,12 @@ EXPORT_SYMBOL(vme_register_bridge);
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void vme_unregister_bridge(struct vme_bridge *bridge)
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{
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int i;
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struct device *dev;
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struct vme_dev *vdev;
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for (i = 0; i < VME_SLOTS_MAX; i++) {
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dev = bridge->dev[i];
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device_unregister(dev);
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vdev = bridge->dev[i];
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device_unregister(&vdev->dev);
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}
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vme_remove_bus(bridge);
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}
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@ -1430,32 +1430,6 @@ EXPORT_SYMBOL(vme_unregister_driver);
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/* - Bus Registration ------------------------------------------------------ */
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static int vme_calc_slot(struct device *dev)
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{
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struct vme_bridge *bridge;
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int num;
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bridge = dev_to_bridge(dev);
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/* Determine slot number */
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num = 0;
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while (num < VME_SLOTS_MAX) {
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if (bridge->dev[num] == dev)
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break;
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num++;
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}
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if (num == VME_SLOTS_MAX) {
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dev_err(dev, "Failed to identify slot\n");
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num = 0;
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goto err_dev;
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}
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num++;
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err_dev:
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return num;
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}
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static struct vme_driver *dev_to_vme_driver(struct device *dev)
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{
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if (dev->driver == NULL)
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@ -1466,15 +1440,17 @@ static struct vme_driver *dev_to_vme_driver(struct device *dev)
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static int vme_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct vme_dev *vdev;
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struct vme_bridge *bridge;
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struct vme_driver *driver;
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int i, num;
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bridge = dev_to_bridge(dev);
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vdev = dev_to_vme_dev(dev);
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bridge = vdev->bridge;
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driver = container_of(drv, struct vme_driver, driver);
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num = vme_calc_slot(dev);
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if (!num)
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num = vdev->id.slot;
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if (num <= 0 || num >= VME_SLOTS_MAX)
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goto err_dev;
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if (driver->bind_table == NULL) {
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@ -1494,7 +1470,7 @@ static int vme_bus_match(struct device *dev, struct device_driver *drv)
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return 1;
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if ((driver->bind_table[i].slot == VME_SLOT_CURRENT) &&
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(num == vme_slot_get(dev)))
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(num == vme_slot_get(vdev)))
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return 1;
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}
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i++;
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@ -1507,30 +1483,30 @@ err_table:
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static int vme_bus_probe(struct device *dev)
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{
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struct vme_bridge *bridge;
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struct vme_driver *driver;
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struct vme_dev *vdev;
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int retval = -ENODEV;
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driver = dev_to_vme_driver(dev);
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bridge = dev_to_bridge(dev);
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vdev = dev_to_vme_dev(dev);
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if (driver->probe != NULL)
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retval = driver->probe(dev, bridge->num, vme_calc_slot(dev));
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retval = driver->probe(vdev);
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return retval;
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}
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static int vme_bus_remove(struct device *dev)
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{
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struct vme_bridge *bridge;
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struct vme_driver *driver;
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struct vme_dev *vdev;
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int retval = -ENODEV;
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driver = dev_to_vme_driver(dev);
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bridge = dev_to_bridge(dev);
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vdev = dev_to_vme_dev(dev);
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if (driver->remove != NULL)
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retval = driver->remove(dev, bridge->num, vme_calc_slot(dev));
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retval = driver->remove(vdev);
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return retval;
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}
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@ -91,17 +91,34 @@ extern struct bus_type vme_bus_type;
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#define VME_SLOT_CURRENT -1
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#define VME_SLOT_ALL -2
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/**
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* VME device identifier structure
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* @bus: The bus ID of the bus the device is on
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* @slot: The slot this device is plugged into
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*/
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struct vme_device_id {
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int bus;
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int slot;
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};
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/**
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* Structure representing a VME device
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* @id: The ID of the device (currently the bus and slot number)
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* @bridge: Pointer to the bridge device this device is on
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* @dev: Internal device structure
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*/
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struct vme_dev {
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struct vme_device_id id;
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struct vme_bridge *bridge;
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struct device dev;
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};
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struct vme_driver {
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struct list_head node;
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const char *name;
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const struct vme_device_id *bind_table;
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int (*probe) (struct device *, int, int);
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int (*remove) (struct device *, int, int);
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int (*probe) (struct vme_dev *);
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int (*remove) (struct vme_dev *);
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void (*shutdown) (void);
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struct device_driver driver;
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};
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@ -112,7 +129,7 @@ void vme_free_consistent(struct vme_resource *, size_t, void *,
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size_t vme_get_size(struct vme_resource *);
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struct vme_resource *vme_slave_request(struct device *, vme_address_t,
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struct vme_resource *vme_slave_request(struct vme_dev *, vme_address_t,
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vme_cycle_t);
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int vme_slave_set(struct vme_resource *, int, unsigned long long,
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unsigned long long, dma_addr_t, vme_address_t, vme_cycle_t);
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|
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@ -120,7 +137,7 @@ 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,
|
||||
struct vme_resource *vme_master_request(struct vme_dev *, 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);
|
||||
|
|
@ -132,7 +149,7 @@ 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_dma_request(struct device *, vme_dma_route_t);
|
||||
struct vme_resource *vme_dma_request(struct vme_dev *, vme_dma_route_t);
|
||||
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);
|
||||
|
|
@ -145,12 +162,12 @@ 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_irq_request(struct device *, int, int,
|
||||
int vme_irq_request(struct vme_dev *, int, int,
|
||||
void (*callback)(int, int, void *), void *);
|
||||
void vme_irq_free(struct device *, int, int);
|
||||
int vme_irq_generate(struct device *, int, int);
|
||||
void vme_irq_free(struct vme_dev *, int, int);
|
||||
int vme_irq_generate(struct vme_dev *, int, int);
|
||||
|
||||
struct vme_resource * vme_lm_request(struct device *);
|
||||
struct vme_resource * vme_lm_request(struct vme_dev *);
|
||||
int vme_lm_count(struct vme_resource *);
|
||||
int vme_lm_set(struct vme_resource *, unsigned long long, vme_address_t,
|
||||
vme_cycle_t);
|
||||
|
|
@ -160,7 +177,7 @@ int vme_lm_attach(struct vme_resource *, int, void (*callback)(int));
|
|||
int vme_lm_detach(struct vme_resource *, int);
|
||||
void vme_lm_free(struct vme_resource *);
|
||||
|
||||
int vme_slot_get(struct device *);
|
||||
int vme_slot_get(struct vme_dev *);
|
||||
|
||||
int vme_register_driver(struct vme_driver *);
|
||||
void vme_unregister_driver(struct vme_driver *);
|
||||
|
|
|
|||
|
|
@ -20,8 +20,8 @@ registration function. The structure is as follows:
|
|||
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);
|
||||
int (*probe) (struct vme_dev *);
|
||||
int (*remove) (struct vme_dev *);
|
||||
void (*shutdown) (void);
|
||||
struct device_driver driver;
|
||||
};
|
||||
|
|
@ -33,7 +33,26 @@ to the probe routine.
|
|||
|
||||
The arguments of the probe routine are as follows:
|
||||
|
||||
probe(struct device *dev, int bus, int slot);
|
||||
probe(struct vme_dev *dev);
|
||||
|
||||
The device structure looks like the following:
|
||||
|
||||
struct vme_dev {
|
||||
struct vme_device_id id;
|
||||
struct vme_bridge *bridge;
|
||||
struct device dev;
|
||||
};
|
||||
|
||||
The 'bridge' field contains a pointer to the bridge device. The 'id' field
|
||||
contains information useful for the probe function:
|
||||
|
||||
struct vme_device_id {
|
||||
int bus;
|
||||
int slot;
|
||||
};
|
||||
|
||||
'bus' is the number of the bus the device being probed is on. 'slot' refers
|
||||
to the specific slot on the VME bus.
|
||||
|
||||
The '.bind_table' is a pointer to an array of type 'vme_device_id':
|
||||
|
||||
|
|
@ -71,13 +90,13 @@ specific window or DMA channel (which may be used by a different driver) this
|
|||
driver allows a resource to be assigned based on the required attributes of the
|
||||
driver in question:
|
||||
|
||||
struct vme_resource * vme_master_request(struct device *dev,
|
||||
struct vme_resource * vme_master_request(struct vme_dev *dev,
|
||||
vme_address_t aspace, vme_cycle_t cycle, vme_width_t width);
|
||||
|
||||
struct vme_resource * vme_slave_request(struct device *dev,
|
||||
struct vme_resource * vme_slave_request(struct vme_dev *dev,
|
||||
vme_address_t aspace, vme_cycle_t cycle);
|
||||
|
||||
struct vme_resource *vme_dma_request(struct device *dev,
|
||||
struct vme_resource *vme_dma_request(struct vme_dev *dev,
|
||||
vme_dma_route_t route);
|
||||
|
||||
For slave windows these attributes are split into those of type 'vme_address_t'
|
||||
|
|
@ -301,10 +320,10 @@ status ID combination. Any given combination can only be assigned a single
|
|||
callback function. A void pointer parameter is provided, the value of which is
|
||||
passed to the callback function, the use of this pointer is user undefined:
|
||||
|
||||
int vme_irq_request(struct device *dev, int level, int statid,
|
||||
int vme_irq_request(struct vme_dev *dev, int level, int statid,
|
||||
void (*callback)(int, int, void *), void *priv);
|
||||
|
||||
void vme_irq_free(struct device *dev, int level, int statid);
|
||||
void vme_irq_free(struct vme_dev *dev, int level, int statid);
|
||||
|
||||
The callback parameters are as follows. Care must be taken in writing a callback
|
||||
function, callback functions run in interrupt context:
|
||||
|
|
@ -318,7 +337,7 @@ Interrupt Generation
|
|||
The following function can be used to generate a VME interrupt at a given VME
|
||||
level and VME status ID:
|
||||
|
||||
int vme_irq_generate(struct device *dev, int level, int statid);
|
||||
int vme_irq_generate(struct vme_dev *dev, int level, int statid);
|
||||
|
||||
|
||||
Location monitors
|
||||
|
|
@ -334,7 +353,7 @@ Location Monitor Management
|
|||
The following functions are provided to request the use of a block of location
|
||||
monitors and to free them after they are no longer required:
|
||||
|
||||
struct vme_resource * vme_lm_request(struct device *dev);
|
||||
struct vme_resource * vme_lm_request(struct vme_dev *dev);
|
||||
|
||||
void vme_lm_free(struct vme_resource * res);
|
||||
|
||||
|
|
@ -380,4 +399,4 @@ Slot Detection
|
|||
|
||||
This function returns the slot ID of the provided bridge.
|
||||
|
||||
int vme_slot_get(struct device *dev);
|
||||
int vme_slot_get(struct vme_dev *dev);
|
||||
|
|
|
|||
|
|
@ -114,9 +114,8 @@ struct vme_bridge {
|
|||
void *driver_priv; /* Private pointer for the bridge driver */
|
||||
struct list_head bus_list; /* list of VME buses */
|
||||
|
||||
struct device *dev[VME_SLOTS_MAX]; /* Device registered with
|
||||
* device model on VME bus
|
||||
*/
|
||||
struct vme_dev *dev[VME_SLOTS_MAX]; /* Device registered
|
||||
* on VME bus */
|
||||
|
||||
/* Interrupt callbacks */
|
||||
struct vme_irq irq[7];
|
||||
|
|
|
|||
Loading…
Reference in New Issue