Merge HEAD from /spare/repo/linux-2.6/.git

1 files changed, 35 insertions, 409 deletions

diff --git a/arch/ppc64/kernel/vio.c b/arch/ppc64/kernel/vio.c
index 0c0ba71..c90e1dd 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
@@ -14,61 +15,30 @@
 
 #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>
-#include <asm/iSeries/vio.h>
-#include <asm/iSeries/HvTypes.h>
-#include <asm/iSeries/HvCallXm.h>
-#include <asm/iSeries/HvLpConfig.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
-#ifdef CONFIG_PPC_ISERIES
-static struct iommu_table veth_iommu_table;
-static struct iommu_table vio_iommu_table;
-#endif
-static struct vio_dev vio_bus_device  = { /* fake "parent" device */
+struct vio_dev vio_bus_device  = { /* fake "parent" device */
 	.name = vio_bus_device.dev.bus_id,
 	.type = "",
-#ifdef CONFIG_PPC_ISERIES
-	.iommu_table = &vio_iommu_table,
-#endif
 	.dev.bus_id = "vio",
 	.dev.bus = &vio_bus_type,
 };
 
-#ifdef CONFIG_PPC_ISERIES
-static struct vio_dev *__init vio_register_device_iseries(char *type,
-		uint32_t unit_num);
-
-struct device *iSeries_vio_dev = &vio_bus_device.dev;
-EXPORT_SYMBOL(iSeries_vio_dev);
-
-#define device_is_compatible(a, b)	1
+static struct vio_bus_ops vio_bus_ops;
 
-#endif
-
-/* convert from struct device to struct vio_dev and pass to driver.
+/*
+ * 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
- * succeeded. */
+ * succeeded.
+ */
 static int vio_bus_probe(struct device *dev)
 {
 	struct vio_dev *viodev = to_vio_dev(dev);
@@ -76,15 +46,12 @@ static int vio_bus_probe(struct device *dev)
 	const struct vio_device_id *id;
 	int error = -ENODEV;
 
-	DBGENTER();
-
 	if (!viodrv->probe)
 		return error;
 
 	id = vio_match_device(viodrv->id_table, viodev);
-	if (id) {
+	if (id)
 		error = viodrv->probe(viodev, id);
-	}
 
 	return error;
 }
@@ -95,11 +62,8 @@ 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) {
+	if (viodrv->remove)
 		return viodrv->remove(viodev);
-	}
 
 	/* driver can't remove */
 	return 1;
@@ -135,193 +99,72 @@ void vio_unregister_driver(struct vio_driver *viodrv)
 EXPORT_SYMBOL(vio_unregister_driver);
 
 /**
- * vio_match_device: - Tell if a VIO device has a matching VIO device id structure.
- * @ids: 	array of VIO device id structures to search in
- * @dev: 	the VIO device structure to match against
+ * vio_match_device: - Tell if a VIO device has a matching
+ *			VIO device id structure.
+ * @ids:	array of VIO device id structures to search in
+ * @dev:	the VIO device structure to match against
  *
  * Used by a driver to check whether a VIO device present in the
  * system is in its list of supported devices. Returns the matching
  * vio_device_id structure or NULL if there is no match.
  */
-static const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
-	const struct vio_dev *dev)
+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 ((strncmp(dev->type, ids->type, strlen(ids->type)) == 0) &&
-			device_is_compatible(dev->dev.platform_data, ids->compat))
+	while (ids->type[0] != '\0') {
+		if (vio_bus_ops.match(ids, dev))
 			return ids;
 		ids++;
 	}
 	return NULL;
 }
 
-#ifdef CONFIG_PPC_ISERIES
-void __init iommu_vio_init(void)
-{
-	struct iommu_table *t;
-	struct iommu_table_cb cb;
-	unsigned long cbp;
-	unsigned long itc_entries;
-
-	cb.itc_busno = 255;    /* Bus 255 is the virtual bus */
-	cb.itc_virtbus = 0xff; /* Ask for virtual bus */
-
-	cbp = virt_to_abs(&cb);
-	HvCallXm_getTceTableParms(cbp);
-
-	itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
-	veth_iommu_table.it_size        = itc_entries / 2;
-	veth_iommu_table.it_busno       = cb.itc_busno;
-	veth_iommu_table.it_offset      = cb.itc_offset;
-	veth_iommu_table.it_index       = cb.itc_index;
-	veth_iommu_table.it_type        = TCE_VB;
-	veth_iommu_table.it_blocksize	= 1;
-
-	t = iommu_init_table(&veth_iommu_table);
-
-	if (!t)
-		printk("Virtual Bus VETH TCE table failed.\n");
-
-	vio_iommu_table.it_size         = itc_entries - veth_iommu_table.it_size;
-	vio_iommu_table.it_busno        = cb.itc_busno;
-	vio_iommu_table.it_offset       = cb.itc_offset +
-					  veth_iommu_table.it_size;
-	vio_iommu_table.it_index        = cb.itc_index;
-	vio_iommu_table.it_type         = TCE_VB;
-	vio_iommu_table.it_blocksize	= 1;
-
-	t = iommu_init_table(&vio_iommu_table);
-
-	if (!t)
-		printk("Virtual Bus VIO TCE table failed.\n");
-}
-#endif
-
-#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
-
-#ifdef CONFIG_PPC_ISERIES
-static void probe_bus_iseries(void)
-{
-	HvLpIndexMap vlan_map = HvLpConfig_getVirtualLanIndexMap();
-	struct vio_dev *viodev;
-	int i;
-
-	/* there is only one of each of these */
-	vio_register_device_iseries("viocons", 0);
-	vio_register_device_iseries("vscsi", 0);
-
-	vlan_map = HvLpConfig_getVirtualLanIndexMap();
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
-		if ((vlan_map & (0x8000 >> i)) == 0)
-			continue;
-		viodev = vio_register_device_iseries("vlan", i);
-		/* veth is special and has it own iommu_table */
-		viodev->iommu_table = &veth_iommu_table;
-	}
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
-		vio_register_device_iseries("viodasd", i);
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
-		vio_register_device_iseries("viocd", i);
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
-		vio_register_device_iseries("viotape", i);
-}
-#endif
-
 /**
  * vio_bus_init: - Initialize the virtual IO bus
  */
-static int __init vio_bus_init(void)
+int __init vio_bus_init(struct vio_bus_ops *ops)
 {
 	int err;
 
+	vio_bus_ops = *ops;
+
 	err = bus_register(&vio_bus_type);
 	if (err) {
 		printk(KERN_ERR "failed to register VIO bus\n");
 		return err;
 	}
 
-	/* the fake parent of all vio devices, just to give us a nice directory */
+	/*
+	 * The fake parent of all vio devices, just to give us
+	 * a nice directory
+	 */
 	err = device_register(&vio_bus_device.dev);
 	if (err) {
-		printk(KERN_WARNING "%s: device_register returned %i\n", __FUNCTION__,
-			err);
+		printk(KERN_WARNING "%s: device_register returned %i\n",
+				__FUNCTION__, err);
 		return err;
 	}
 
-#ifdef CONFIG_PPC_PSERIES
-	probe_bus_pseries();
-#endif
-#ifdef CONFIG_PPC_ISERIES
-	probe_bus_iseries();
-#endif
-
 	return 0;
 }
 
-__initcall(vio_bus_init);
-
 /* 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 (vio_bus_ops.release_device)
+		vio_bus_ops.release_device(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)
+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);
 }
 DEVICE_ATTR(name, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_name, NULL);
 
-static 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)
+struct vio_dev * __devinit vio_register_device(struct vio_dev *viodev)
 {
-	DBGENTER();
-
-	viodev->name = name;
-	viodev->type = type;
-	viodev->unit_address = unit_address;
-	viodev->iommu_table = iommu_table;
 	/* init generic 'struct device' fields: */
 	viodev->dev.parent = &vio_bus_device.dev;
 	viodev->dev.bus = &vio_bus_type;
@@ -338,222 +181,15 @@ static 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
-
-#ifdef CONFIG_PPC_ISERIES
-/**
- * vio_register_device: - Register a new vio device.
- * @voidev:	The device to register.
- */
-static struct vio_dev *__init vio_register_device_iseries(char *type,
-		uint32_t unit_num)
-{
-	struct vio_dev *viodev;
-
-	DBGENTER();
-
-	/* 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));
-
-	snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%s%d", type, unit_num);
-
-	return vio_register_device_common(viodev, viodev->dev.bus_id, type,
-			unit_num, &vio_iommu_table);
-}
-#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 (vio_bus_ops.unregister_device)
+		vio_bus_ops.unregister_device(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)
 {
@@ -615,18 +251,8 @@ static int vio_bus_match(struct device *dev, struct device_driver *drv)
 	const struct vio_dev *vio_dev = to_vio_dev(dev);
 	struct vio_driver *vio_drv = to_vio_driver(drv);
 	const struct vio_device_id *ids = vio_drv->id_table;
-	const struct vio_device_id *found_id;
-
-	DBGENTER();
 
-	if (!ids)
-		return 0;
-
-	found_id = vio_match_device(ids, vio_dev);
-	if (found_id)
-		return 1;
-
-	return 0;
+	return (ids != NULL) && (vio_match_device(ids, vio_dev) != NULL);
 }
 
 struct bus_type vio_bus_type = {