[PATCH] ppc64: split pSeries specific parts out of vio.c

This patch just splits out the pSeries specific parts of vio.c.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 13 insertions, 277 deletions

diff --git a/arch/ppc64/kernel/vio.c b/arch/ppc64/kernel/vio.c
index 8a243cad0f8b..3b790bafcaad 100644
--- a/arch/ppc64/kernel/vio.c
+++ b/arch/ppc64/kernel/vio.c
@@ -1,10 +1,11 @@
 /*
  * IBM PowerPC Virtual I/O Infrastructure Support.
  *
- *    Copyright (c) 2003 IBM Corp.
+ *    Copyright (c) 2003-2005 IBM Corp.
  *     Dave Engebretsen engebret@us.ibm.com
  *     Santiago Leon santil@us.ibm.com
  *     Hollis Blanchard <hollisb@us.ibm.com>
+ *     Stephen Rothwell
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -14,29 +15,16 @@
 
 #include <linux/init.h>
 #include <linux/console.h>
-#include <linux/version.h>
 #include <linux/module.h>
-#include <linux/kobject.h>
 #include <linux/mm.h>
 #include <linux/dma-mapping.h>
-#include <asm/rtas.h>
 #include <asm/iommu.h>
 #include <asm/dma.h>
-#include <asm/ppcdebug.h>
 #include <asm/vio.h>
-#include <asm/hvcall.h>
-
-#define DBGENTER() pr_debug("%s entered\n", __FUNCTION__)
-
-extern struct subsystem devices_subsys; /* needed for vio_find_name() */
 
 static const struct vio_device_id *vio_match_device(
                 const struct vio_device_id *, const struct vio_dev *);
 
-#ifdef CONFIG_PPC_PSERIES
-static struct iommu_table *vio_build_iommu_table(struct vio_dev *);
-static int vio_num_address_cells;
-#endif
 struct vio_dev vio_bus_device  = { /* fake "parent" device */
         .name = vio_bus_device.dev.bus_id,
         .type = "",
@@ -46,6 +34,8 @@ struct vio_dev vio_bus_device  = { /* fake "parent" device */
 
 static int (*is_match)(const struct vio_device_id *id,
                 const struct vio_dev *dev);
+static void (*unregister_device_callback)(struct vio_dev *dev);
+static void (*release_device_callback)(struct device *dev);
 
 /* convert from struct device to struct vio_dev and pass to driver.
  * dev->driver has already been set by generic code because vio_bus_match
@@ -57,8 +47,6 @@ static int vio_bus_probe(struct device *dev)
         const struct vio_device_id *id;
         int error = -ENODEV;
 
-        DBGENTER();
-
         if (!viodrv->probe)
                 return error;
 
@@ -76,8 +64,6 @@ static int vio_bus_remove(struct device *dev)
         struct vio_dev *viodev = to_vio_dev(dev);
         struct vio_driver *viodrv = to_vio_driver(dev->driver);
 
-        DBGENTER();
-
         if (viodrv->remove) {
                 return viodrv->remove(viodev);
         }
@@ -127,8 +113,6 @@ EXPORT_SYMBOL(vio_unregister_driver);
 static const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
         const struct vio_dev *dev)
 {
-        DBGENTER();
-
         while (ids->type) {
                 if (is_match(ids, dev))
                         return ids;
@@ -137,39 +121,19 @@ static const struct vio_device_id * vio_match_device(const struct vio_device_id
         return NULL;
 }
 
-#ifdef CONFIG_PPC_PSERIES
-static void probe_bus_pseries(void)
-{
-        struct device_node *node_vroot, *of_node;
-
-        node_vroot = find_devices("vdevice");
-        if ((node_vroot == NULL) || (node_vroot->child == NULL))
-                /* this machine doesn't do virtual IO, and that's ok */
-                return;
-
-        vio_num_address_cells = prom_n_addr_cells(node_vroot->child);
-
-        /*
-         * Create struct vio_devices for each virtual device in the device tree.
-         * Drivers will associate with them later.
-         */
-        for (of_node = node_vroot->child; of_node != NULL;
-                        of_node = of_node->sibling) {
-                printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, of_node);
-                vio_register_device_node(of_node);
-        }
-}
-#endif
-
 /**
  * vio_bus_init: - Initialize the virtual IO bus
  */
 int __init vio_bus_init(int (*match_func)(const struct vio_device_id *id,
-                        const struct vio_dev *dev))
+                        const struct vio_dev *dev),
+                void (*unregister_dev)(struct vio_dev *),
+                void (*release_dev)(struct device *))
 {
         int err;
 
         is_match = match_func;
+        unregister_device_callback = unregister_dev;
+        release_device_callback = release_dev;
 
         err = bus_register(&vio_bus_type);
         if (err) {
@@ -190,56 +154,14 @@ int __init vio_bus_init(int (*match_func)(const struct vio_device_id *id,
         return 0;
 }
 
-#ifdef CONFIG_PPC_PSERIES
-/**
- * vio_match_device_pseries: - Tell if a pSeries VIO device matches a
- *      vio_device_id
- */
-static int vio_match_device_pseries(const struct vio_device_id *id,
-                const struct vio_dev *dev)
-{
-        return (strncmp(dev->type, id->type, strlen(id->type)) == 0) &&
-                        device_is_compatible(dev->dev.platform_data, id->compat);
-}
-
-/**
- * vio_bus_init_pseries: - Initialize the pSeries virtual IO bus
- */
-static int __init vio_bus_init_pseries(void)
-{
-        int err;
-
-        err = vio_bus_init(vio_match_device_pseries);
-        if (err == 0)
-                probe_bus_pseries();
-        return err;
-}
-
-__initcall(vio_bus_init_pseries);
-#endif
-
 /* vio_dev refcount hit 0 */
 static void __devinit vio_dev_release(struct device *dev)
 {
-        DBGENTER();
-
-#ifdef CONFIG_PPC_PSERIES
-        /* XXX free TCE table */
-        of_node_put(dev->platform_data);
-#endif
+        if (release_device_callback)
+                release_device_callback(dev);
         kfree(to_vio_dev(dev));
 }
 
-#ifdef CONFIG_PPC_PSERIES
-static ssize_t viodev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
-{
-        struct device_node *of_node = dev->platform_data;
-
-        return sprintf(buf, "%s\n", of_node->full_name);
-}
-DEVICE_ATTR(devspec, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_devspec, NULL);
-#endif
-
 static ssize_t viodev_show_name(struct device *dev, struct device_attribute *attr, char *buf)
 {
         return sprintf(buf, "%s\n", to_vio_dev(dev)->name);
@@ -250,8 +172,6 @@ struct vio_dev * __devinit vio_register_device_common(
                 struct vio_dev *viodev, char *name, char *type,
                 uint32_t unit_address, struct iommu_table *iommu_table)
 {
-        DBGENTER();
-
         viodev->name = name;
         viodev->type = type;
         viodev->unit_address = unit_address;
@@ -272,197 +192,15 @@ struct vio_dev * __devinit vio_register_device_common(
         return viodev;
 }
 
-#ifdef CONFIG_PPC_PSERIES
-/**
- * vio_register_device_node: - Register a new vio device.
- * @of_node:    The OF node for this device.
- *
- * Creates and initializes a vio_dev structure from the data in
- * of_node (dev.platform_data) and adds it to the list of virtual devices.
- * Returns a pointer to the created vio_dev or NULL if node has
- * NULL device_type or compatible fields.
- */
-struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node)
-{
-        struct vio_dev *viodev;
-        unsigned int *unit_address;
-        unsigned int *irq_p;
-
-        DBGENTER();
-
-        /* we need the 'device_type' property, in order to match with drivers */
-        if ((NULL == of_node->type)) {
-                printk(KERN_WARNING
-                        "%s: node %s missing 'device_type'\n", __FUNCTION__,
-                        of_node->name ? of_node->name : "<unknown>");
-                return NULL;
-        }
-
-        unit_address = (unsigned int *)get_property(of_node, "reg", NULL);
-        if (!unit_address) {
-                printk(KERN_WARNING "%s: node %s missing 'reg'\n", __FUNCTION__,
-                        of_node->name ? of_node->name : "<unknown>");
-                return NULL;
-        }
-
-        /* allocate a vio_dev for this node */
-        viodev = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
-        if (!viodev) {
-                return NULL;
-        }
-        memset(viodev, 0, sizeof(struct vio_dev));
-
-        viodev->dev.platform_data = of_node_get(of_node);
-
-        viodev->irq = NO_IRQ;
-        irq_p = (unsigned int *)get_property(of_node, "interrupts", NULL);
-        if (irq_p) {
-                int virq = virt_irq_create_mapping(*irq_p);
-                if (virq == NO_IRQ) {
-                        printk(KERN_ERR "Unable to allocate interrupt "
-                               "number for %s\n", of_node->full_name);
-                } else
-                        viodev->irq = irq_offset_up(virq);
-        }
-
-        snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address);
-
-        /* register with generic device framework */
-        if (vio_register_device_common(viodev, of_node->name, of_node->type,
-                                *unit_address, vio_build_iommu_table(viodev))
-                        == NULL) {
-                /* XXX free TCE table */
-                kfree(viodev);
-                return NULL;
-        }
-        device_create_file(&viodev->dev, &dev_attr_devspec);
-
-        return viodev;
-}
-EXPORT_SYMBOL(vio_register_device_node);
-#endif
-
 void __devinit vio_unregister_device(struct vio_dev *viodev)
 {
-        DBGENTER();
-#ifdef CONFIG_PPC_PSERIES
-        device_remove_file(&viodev->dev, &dev_attr_devspec);
-#endif
+        if (unregister_device_callback)
+                unregister_device_callback(viodev);
         device_remove_file(&viodev->dev, &dev_attr_name);
         device_unregister(&viodev->dev);
 }
 EXPORT_SYMBOL(vio_unregister_device);
 
-#ifdef CONFIG_PPC_PSERIES
-/**
- * vio_get_attribute: - get attribute for virtual device
- * @vdev:       The vio device to get property.
- * @which:      The property/attribute to be extracted.
- * @length:     Pointer to length of returned data size (unused if NULL).
- *
- * Calls prom.c's get_property() to return the value of the
- * attribute specified by the preprocessor constant @which
-*/
-const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length)
-{
-        return get_property(vdev->dev.platform_data, (char*)which, length);
-}
-EXPORT_SYMBOL(vio_get_attribute);
-
-/* vio_find_name() - internal because only vio.c knows how we formatted the
- * kobject name
- * XXX once vio_bus_type.devices is actually used as a kset in
- * drivers/base/bus.c, this function should be removed in favor of
- * "device_find(kobj_name, &vio_bus_type)"
- */
-static struct vio_dev *vio_find_name(const char *kobj_name)
-{
-        struct kobject *found;
-
-        found = kset_find_obj(&devices_subsys.kset, kobj_name);
-        if (!found)
-                return NULL;
-
-        return to_vio_dev(container_of(found, struct device, kobj));
-}
-
-/**
- * vio_find_node - find an already-registered vio_dev
- * @vnode: device_node of the virtual device we're looking for
- */
-struct vio_dev *vio_find_node(struct device_node *vnode)
-{
-        uint32_t *unit_address;
-        char kobj_name[BUS_ID_SIZE];
-
-        /* construct the kobject name from the device node */
-        unit_address = (uint32_t *)get_property(vnode, "reg", NULL);
-        if (!unit_address)
-                return NULL;
-        snprintf(kobj_name, BUS_ID_SIZE, "%x", *unit_address);
-
-        return vio_find_name(kobj_name);
-}
-EXPORT_SYMBOL(vio_find_node);
-
-/**
- * vio_build_iommu_table: - gets the dma information from OF and builds the TCE tree.
- * @dev: the virtual device.
- *
- * Returns a pointer to the built tce tree, or NULL if it can't
- * find property.
-*/
-static struct iommu_table * vio_build_iommu_table(struct vio_dev *dev)
-{
-        unsigned int *dma_window;
-        struct iommu_table *newTceTable;
-        unsigned long offset;
-        int dma_window_property_size;
-
-        dma_window = (unsigned int *) get_property(dev->dev.platform_data, "ibm,my-dma-window", &dma_window_property_size);
-        if(!dma_window) {
-                return NULL;
-        }
-
-        newTceTable = (struct iommu_table *) kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
-
-        /*  There should be some code to extract the phys-encoded offset
-                using prom_n_addr_cells(). However, according to a comment
-                on earlier versions, it's always zero, so we don't bother */
-        offset = dma_window[1] >>  PAGE_SHIFT;
-
-        /* TCE table size - measured in tce entries */
-        newTceTable->it_size            = dma_window[4] >> PAGE_SHIFT;
-        /* offset for VIO should always be 0 */
-        newTceTable->it_offset          = offset;
-        newTceTable->it_busno           = 0;
-        newTceTable->it_index           = (unsigned long)dma_window[0];
-        newTceTable->it_type            = TCE_VB;
-
-        return iommu_init_table(newTceTable);
-}
-
-int vio_enable_interrupts(struct vio_dev *dev)
-{
-        int rc = h_vio_signal(dev->unit_address, VIO_IRQ_ENABLE);
-        if (rc != H_Success) {
-                printk(KERN_ERR "vio: Error 0x%x enabling interrupts\n", rc);
-        }
-        return rc;
-}
-EXPORT_SYMBOL(vio_enable_interrupts);
-
-int vio_disable_interrupts(struct vio_dev *dev)
-{
-        int rc = h_vio_signal(dev->unit_address, VIO_IRQ_DISABLE);
-        if (rc != H_Success) {
-                printk(KERN_ERR "vio: Error 0x%x disabling interrupts\n", rc);
-        }
-        return rc;
-}
-EXPORT_SYMBOL(vio_disable_interrupts);
-#endif
-
 static dma_addr_t vio_map_single(struct device *dev, void *vaddr,
                           size_t size, enum dma_data_direction direction)
 {
@@ -526,8 +264,6 @@ static int vio_bus_match(struct device *dev, struct device_driver *drv)
         const struct vio_device_id *ids = vio_drv->id_table;
         const struct vio_device_id *found_id;
 
-        DBGENTER();
-
         if (!ids)
                 return 0;