[ppc64] VIO support, from Dave Boutcher, Hollis Blanchard and Santiago Leon
Add virtual I/O support. These routines provide the infrastructure
needed by virtual SCSI, virtual ethernet, virtual serial on IBM
pSeries servers
---
arch/ppc64/kernel/Makefile | 2
arch/ppc64/kernel/pci_dma.c | 10
arch/ppc64/kernel/vio.c | 535 ++++++++++++++++++++++++++++++++++++++++++++
include/asm-ppc64/vio.h | 130 ++++++++++
4 files changed, 671 insertions(+), 6 deletions(-)
diff -puN arch/ppc64/kernel/Makefile~ppc64-addvio arch/ppc64/kernel/Makefile
--- 25/arch/ppc64/kernel/Makefile~ppc64-addvio 2004-01-13 23:22:58.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/Makefile 2004-01-13 23:22:58.000000000 -0800
@@ -29,7 +29,7 @@ obj-$(CONFIG_PPC_ISERIES) += iSeries_irq
obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
eeh.o nvram.o rtasd.o ras.o \
open_pic.o xics.o pSeries_htab.o rtas.o \
- chrp_setup.o i8259.o prom.o
+ chrp_setup.o i8259.o prom.o vio.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
diff -puN arch/ppc64/kernel/pci_dma.c~ppc64-addvio arch/ppc64/kernel/pci_dma.c
--- 25/arch/ppc64/kernel/pci_dma.c~ppc64-addvio 2004-01-13 23:22:58.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/pci_dma.c 2004-01-13 23:22:58.000000000 -0800
@@ -100,7 +100,7 @@ void free_tce_range_nolock(struct TceTab
unsigned order );
/* allocates a range of tces and sets them to the pages */
-static inline dma_addr_t get_tces( struct TceTable *,
+inline dma_addr_t get_tces( struct TceTable *,
unsigned order,
void *page,
unsigned numPages,
@@ -212,7 +212,7 @@ static void tce_build_pSeries(struct Tce
* Build a TceTable structure. This contains a multi-level bit map which
* is used to manage allocation of the tce space.
*/
-static struct TceTable *build_tce_table( struct TceTable * tbl )
+struct TceTable *build_tce_table( struct TceTable * tbl )
{
unsigned long bits, bytes, totalBytes;
unsigned long numBits[NUM_TCE_LEVELS], numBytes[NUM_TCE_LEVELS];
@@ -520,7 +520,7 @@ static long test_tce_range( struct TceTa
return retval;
}
-static inline dma_addr_t get_tces( struct TceTable *tbl, unsigned order, void *page, unsigned numPages, int direction )
+inline dma_addr_t get_tces( struct TceTable *tbl, unsigned order, void *page, unsigned numPages, int direction )
{
long tcenum;
unsigned long uaddr;
@@ -555,7 +555,7 @@ static inline dma_addr_t get_tces( struc
}
#ifdef CONFIG_PPC_ISERIES
-static void tce_free_one_iSeries( struct TceTable *tbl, long tcenum )
+void tce_free_one_iSeries( struct TceTable *tbl, long tcenum )
{
u64 set_tce_rc;
union Tce tce;
@@ -583,7 +583,7 @@ static void tce_free_one_pSeries( struct
}
#endif
-static void tce_free(struct TceTable *tbl, dma_addr_t dma_addr,
+void tce_free(struct TceTable *tbl, dma_addr_t dma_addr,
unsigned order, unsigned num_pages)
{
long tcenum, total_tces, free_tce;
diff -puN /dev/null arch/ppc64/kernel/vio.c
--- /dev/null 2002-08-30 16:31:37.000000000 -0700
+++ 25-akpm/arch/ppc64/kernel/vio.c 2004-01-13 23:22:58.000000000 -0800
@@ -0,0 +1,535 @@
+/*
+ * IBM PowerPC Virtual I/O Infrastructure Support.
+ *
+ * Copyright (c) 2003 IBM Corp.
+ * Dave Engebretsen engebret@us.ibm.com
+ * Santiago Leon santil@us.ibm.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <asm/rtas.h>
+#include <asm/pci_dma.h>
+#include <asm/dma.h>
+#include <asm/ppcdebug.h>
+#include <asm/vio.h>
+#include <asm/hvcall.h>
+#include <linux/mm.h>
+#include "open_pic.h" /* temporary, until we merge large irq support */
+
+extern struct TceTable *build_tce_table(struct TceTable *tbl);
+
+extern dma_addr_t get_tces(struct TceTable *, unsigned order,
+ void *page, unsigned numPages, int direction);
+extern void tce_free(struct TceTable *tbl, dma_addr_t dma_addr,
+ unsigned order, unsigned num_pages);
+
+
+static struct vio_bus vio_bus;
+static LIST_HEAD(registered_vio_drivers);
+int vio_num_address_cells;
+EXPORT_SYMBOL(vio_num_address_cells);
+
+/* TODO:
+ * really fit into driver model (see include/linux/device.h)
+ * locking around list accesses
+ */
+
+/**
+ * vio_register_driver: - Register a new vio driver
+ * @drv: The vio_driver structure to be registered.
+ *
+ * Adds the driver structure to the list of registered drivers
+ * Returns the number of vio devices which were claimed by the driver
+ * during registration. The driver remains registered even if the
+ * return value is zero.
+ */
+int vio_register_driver(struct vio_driver *drv)
+{
+ int count = 0;
+ struct vio_dev *dev;
+
+ printk(KERN_DEBUG "%s: driver %s/%s registering\n", __FUNCTION__,
+ drv->id_table[0].type, drv->id_table[0].type);
+
+ /* find matching devices not already claimed by other drivers and pass
+ * them to probe() */
+ list_for_each_entry(dev, &vio_bus.devices, devices_list) {
+ const struct vio_device_id* id;
+
+ if (dev->driver)
+ continue; /* this device is already owned */
+
+ id = vio_match_device(drv->id_table, dev);
+ if (drv && id) {
+ if (0 == drv->probe(dev, id)) {
+ printk(KERN_DEBUG " took device %p\n", dev);
+ dev->driver = drv;
+ count++;
+ }
+ }
+ }
+
+ list_add_tail(&drv->node, ®istered_vio_drivers);
+
+ return count;
+}
+EXPORT_SYMBOL(vio_register_driver);
+
+/**
+ * vio_unregister_driver - Remove registration of vio driver.
+ * @driver: The vio_driver struct to be removed form registration
+ *
+ * Searches for devices that are assigned to the driver and calls
+ * driver->remove() for each one. Removes the driver from the list
+ * of registered drivers. Returns the number of devices that were
+ * assigned to that driver.
+ */
+int vio_unregister_driver(struct vio_driver *driver)
+{
+ struct vio_dev *dev;
+ int devices_found = 0;
+
+ list_for_each_entry(dev, &vio_bus.devices, devices_list) {
+ if (dev->driver == driver) {
+ driver->remove(dev);
+ dev->driver = NULL;
+ devices_found++;
+ }
+ }
+
+ list_del(&driver->node);
+
+ return devices_found;
+}
+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
+ *
+ * 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.
+ */
+const struct vio_device_id *
+vio_match_device(const struct vio_device_id *ids, const struct vio_dev *dev)
+{
+ while (ids->type) {
+ if ((strncmp(dev->archdata->type, ids->type, strlen(ids->type)) == 0) &&
+ device_is_compatible((struct device_node*)dev->archdata, ids->compat))
+ return ids;
+ ids++;
+ }
+ return NULL;
+}
+
+/**
+ * vio_bus_init: - Initialize the virtual IO bus
+ */
+int __init
+vio_bus_init(void)
+{
+ struct device_node *node_vroot, *node_vdev;
+
+ INIT_LIST_HEAD(&vio_bus.devices);
+
+ /*
+ * Create device node entries for each virtual device
+ * identified in the device tree.
+ * Functionally takes the place of pci_scan_bus
+ */
+ node_vroot = find_devices("vdevice");
+ if (!node_vroot) {
+ printk(KERN_WARNING "%s: no /vdevice node\n", __FUNCTION__);
+ return 0;
+ }
+
+ vio_num_address_cells = prom_n_addr_cells(node_vroot->child);
+
+ for (node_vdev = node_vroot->child;
+ node_vdev != NULL;
+ node_vdev = node_vdev->sibling) {
+ printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, node_vdev);
+
+ vio_register_device(node_vdev);
+ }
+
+ return 0;
+}
+
+__initcall(vio_bus_init);
+
+
+/**
+ * vio_probe_device - attach dev to appropriate driver
+ * @dev: device to find a driver for
+ *
+ * Walks the list of registered VIO drivers looking for one to take this
+ * device.
+ *
+ * Returns a pointer to the matched driver or NULL if driver is not
+ * found.
+ */
+struct vio_driver * __devinit vio_probe_device(struct vio_dev* dev)
+{
+ struct vio_driver *driver;
+
+ list_for_each_entry(driver, ®istered_vio_drivers, node) {
+ const struct vio_device_id* id;
+
+ id = vio_match_device(driver->id_table, dev);
+ if (id && (0 < driver->probe(dev, id))) {
+ printk(KERN_DEBUG "%s: driver %s/%s took device %p\n",
+ __FUNCTION__, id->type, id->compat, dev);
+ dev->driver = driver;
+ return driver;
+ }
+ }
+
+ printk(KERN_DEBUG "%s: device %p found no driver\n", __FUNCTION__, dev);
+ return NULL;
+}
+
+/**
+ * vio_register_device: - Register a new vio device.
+ * @archdata: The OF node for this device.
+ *
+ * Creates and initializes a vio_dev structure from the data in
+ * node_vdev (archdata) 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(struct device_node *node_vdev)
+{
+ struct vio_dev *dev;
+ unsigned int *unit_address;
+ unsigned int *irq_p;
+
+ /* guarantee all vio_devs have 'device_type' field*/
+ if ((NULL == node_vdev->type)) {
+ printk(KERN_WARNING
+ "%s: node %s missing 'device_type'\n", __FUNCTION__,
+ node_vdev->name ? node_vdev->name : "<unknown>");
+ return NULL;
+ }
+
+ unit_address = (unsigned int *)get_property(node_vdev, "reg", NULL);
+ if (!unit_address) {
+ printk(KERN_WARNING "%s: node %s missing 'reg'\n", __FUNCTION__,
+ node_vdev->name ? node_vdev->name : "<unknown>");
+ return NULL;
+ }
+
+ /* allocate a vio_dev for this node */
+ dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+ memset(dev, 0, sizeof(*dev));
+
+ dev->archdata = (void*)of_node_get(node_vdev);
+ dev->bus = &vio_bus;
+ dev->unit_address = *unit_address;
+ dev->tce_table = vio_build_tce_table(dev);
+
+ irq_p = (unsigned int *) get_property(node_vdev, "interrupts", 0);
+ if(irq_p) {
+ dev->irq = openpic_to_irq(virt_irq_create_mapping(*irq_p));
+ } else {
+ dev->irq = (unsigned int) -1;
+ }
+
+ list_add_tail(&dev->devices_list, &vio_bus.devices);
+
+ vio_probe_device(dev); /* finally, assign it to a driver */
+
+ return dev;
+}
+EXPORT_SYMBOL(vio_register_device);
+
+int __devinit vio_unregister_device(struct vio_dev *dev)
+{
+ list_del(&dev->devices_list);
+ of_node_put(dev->archdata);
+
+ return 0;
+}
+EXPORT_SYMBOL(vio_unregister_device);
+
+/**
+ * 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((struct device_node *)vdev->archdata, (char*)which, length);
+}
+EXPORT_SYMBOL(vio_get_attribute);
+
+/**
+ * vio_build_tce_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.
+*/
+struct TceTable * vio_build_tce_table(struct vio_dev *dev)
+{
+ unsigned int *dma_window;
+ struct TceTable *newTceTable;
+ unsigned long offset;
+ unsigned long size;
+ int dma_window_property_size;
+
+ dma_window = (unsigned int *) get_property((struct device_node *)dev->archdata, "ibm,my-dma-window", &dma_window_property_size);
+ if(!dma_window) {
+ return NULL;
+ }
+
+ newTceTable = (struct TceTable *) kmalloc(sizeof(struct TceTable), GFP_KERNEL);
+
+ /* RPA docs say that #address-cells is always 1 for virtual
+ devices, but some older boxes' OF returns 2. This should
+ be removed by GA, unless there is legacy OFs that still
+ have 2 for #address-cells */
+ size = ((dma_window[1+vio_num_address_cells]
+ >> PAGE_SHIFT) << 3) >> PAGE_SHIFT;
+
+ /* This is just an ugly kludge. Remove as soon as the OF for all
+ machines actually follow the spec and encodes the offset field
+ as phys-encode (that is, #address-cells wide)*/
+ if (dma_window_property_size == 12) {
+ size = ((dma_window[1] >> PAGE_SHIFT) << 3) >> PAGE_SHIFT;
+ } else if (dma_window_property_size == 20) {
+ size = ((dma_window[4] >> PAGE_SHIFT) << 3) >> PAGE_SHIFT;
+ } else {
+ printk(KERN_WARNING "vio_build_tce_table: Invalid size of ibm,my-dma-window=%i, using 0x80 for size\n", dma_window_property_size);
+ size = 0x80;
+ }
+
+ /* 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 units of pages of tce table */
+ newTceTable->size = size;
+ /* offset for VIO should always be 0 */
+ newTceTable->startOffset = offset;
+ newTceTable->busNumber = 0;
+ newTceTable->index = (unsigned long)dma_window[0];
+ newTceTable->tceType = TCE_VB;
+
+ return build_tce_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);
+
+
+dma_addr_t vio_map_single(struct vio_dev *dev, void *vaddr,
+ size_t size, int direction )
+{
+ struct TceTable * tbl;
+ dma_addr_t dma_handle = NO_TCE;
+ unsigned long uaddr;
+ unsigned order, nPages;
+
+ if(direction == PCI_DMA_NONE) BUG();
+
+ uaddr = (unsigned long)vaddr;
+ nPages = PAGE_ALIGN( uaddr + size ) - ( uaddr & PAGE_MASK );
+ order = get_order( nPages & PAGE_MASK );
+ nPages >>= PAGE_SHIFT;
+
+ /* Client asked for way to much space. This is checked later anyway */
+ /* It is easier to debug here for the drivers than in the tce tables.*/
+ if(order >= NUM_TCE_LEVELS) {
+ printk("VIO_DMA: vio_map_single size to large: 0x%lx \n",size);
+ return NO_TCE;
+ }
+
+ tbl = dev->tce_table;
+
+ if(tbl) {
+ dma_handle = get_tces(tbl, order, vaddr, nPages, direction);
+ dma_handle |= (uaddr & ~PAGE_MASK);
+ }
+
+ return dma_handle;
+}
+EXPORT_SYMBOL(vio_map_single);
+
+void vio_unmap_single(struct vio_dev *dev, dma_addr_t dma_handle,
+ size_t size, int direction)
+{
+ struct TceTable * tbl;
+ unsigned order, nPages;
+
+ if (direction == PCI_DMA_NONE) BUG();
+
+ nPages = PAGE_ALIGN( dma_handle + size ) - ( dma_handle & PAGE_MASK );
+ order = get_order( nPages & PAGE_MASK );
+ nPages >>= PAGE_SHIFT;
+
+ /* Client asked for way to much space. This is checked later anyway */
+ /* It is easier to debug here for the drivers than in the tce tables.*/
+ if(order >= NUM_TCE_LEVELS) {
+ printk("VIO_DMA: vio_unmap_single 0x%lx size to large: 0x%lx \n",(unsigned long)dma_handle,(unsigned long)size);
+ return;
+ }
+
+ tbl = dev->tce_table;
+ if(tbl) tce_free(tbl, dma_handle, order, nPages);
+}
+EXPORT_SYMBOL(vio_unmap_single);
+
+int vio_map_sg(struct vio_dev *vdev, struct scatterlist *sglist, int nelems,
+ int direction)
+{
+ int i;
+
+ for (i = 0; i < nelems; i++) {
+
+ /* 2.4 scsi scatterlists use address field.
+ Not sure about other subsystems. */
+ void *vaddr;
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,0)
+ if (sglist->address)
+ vaddr = sglist->address;
+ else
+#endif
+ vaddr = page_address(sglist->page) + sglist->offset;
+
+ sglist->dma_address = vio_map_single(vdev, vaddr,
+ sglist->length,
+ direction);
+ sglist->dma_length = sglist->length;
+ sglist++;
+ }
+
+ return nelems;
+}
+EXPORT_SYMBOL(vio_map_sg);
+
+void vio_unmap_sg(struct vio_dev *vdev, struct scatterlist *sglist, int nelems,
+ int direction)
+{
+ while (nelems--) {
+ vio_unmap_single(vdev, sglist->dma_address,
+ sglist->dma_length, direction);
+ sglist++;
+ }
+}
+
+void *vio_alloc_consistent(struct vio_dev *dev, size_t size,
+ dma_addr_t *dma_handle)
+{
+ struct TceTable * tbl;
+ void *ret = NULL;
+ unsigned order, nPages;
+ dma_addr_t tce;
+
+ size = PAGE_ALIGN(size);
+ order = get_order(size);
+ nPages = 1 << order;
+
+ /* Client asked for way to much space. This is checked later anyway */
+ /* It is easier to debug here for the drivers than in the tce tables.*/
+ if(order >= NUM_TCE_LEVELS) {
+ printk("VIO_DMA: vio_alloc_consistent size to large: 0x%lx \n",size);
+ return (void *)NO_TCE;
+ }
+
+ tbl = dev->tce_table;
+
+ if ( tbl ) {
+ /* Alloc enough pages (and possibly more) */
+ ret = (void *)__get_free_pages( GFP_ATOMIC, order );
+ if ( ret ) {
+ /* Page allocation succeeded */
+ memset(ret, 0, nPages << PAGE_SHIFT);
+ /* Set up tces to cover the allocated range */
+ tce = get_tces( tbl, order, ret, nPages, PCI_DMA_BIDIRECTIONAL );
+ if ( tce == NO_TCE ) {
+ PPCDBG(PPCDBG_TCE, "vio_alloc_consistent: get_tces failed\n" );
+ free_pages( (unsigned long)ret, order );
+ ret = NULL;
+ }
+ else
+ {
+ *dma_handle = tce;
+ }
+ }
+ else PPCDBG(PPCDBG_TCE, "vio_alloc_consistent: __get_free_pages failed for order = %d\n", order);
+ }
+ else PPCDBG(PPCDBG_TCE, "vio_alloc_consistent: get_tce_table failed for 0x%016lx\n", dev);
+
+ PPCDBG(PPCDBG_TCE, "\tvio_alloc_consistent: dma_handle = 0x%16.16lx\n", *dma_handle);
+ PPCDBG(PPCDBG_TCE, "\tvio_alloc_consistent: return = 0x%16.16lx\n", ret);
+ return ret;
+}
+EXPORT_SYMBOL(vio_alloc_consistent);
+
+void vio_free_consistent(struct vio_dev *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ struct TceTable * tbl;
+ unsigned order, nPages;
+
+ PPCDBG(PPCDBG_TCE, "vio_free_consistent:\n");
+ PPCDBG(PPCDBG_TCE, "\tdev = 0x%16.16lx, size = 0x%16.16lx, dma_handle = 0x%16.16lx, vaddr = 0x%16.16lx\n", dev, size, dma_handle, vaddr);
+
+ size = PAGE_ALIGN(size);
+ order = get_order(size);
+ nPages = 1 << order;
+
+ /* Client asked for way to much space. This is checked later anyway */
+ /* It is easier to debug here for the drivers than in the tce tables.*/
+ if(order >= NUM_TCE_LEVELS) {
+ printk("PCI_DMA: pci_free_consistent size to large: 0x%lx \n",size);
+ return;
+ }
+
+ tbl = dev->tce_table;
+
+ if ( tbl ) {
+ tce_free(tbl, dma_handle, order, nPages);
+ free_pages( (unsigned long)vaddr, order );
+ }
+}
+EXPORT_SYMBOL(vio_free_consistent);
+
+EXPORT_SYMBOL(plpar_hcall_norets);
+EXPORT_SYMBOL(plpar_hcall_8arg_2ret);
diff -puN /dev/null include/asm-ppc64/vio.h
--- /dev/null 2002-08-30 16:31:37.000000000 -0700
+++ 25-akpm/include/asm-ppc64/vio.h 2004-01-13 23:22:58.000000000 -0800
@@ -0,0 +1,130 @@
+/*
+ * IBM PowerPC Virtual I/O Infrastructure Support.
+ *
+ * Copyright (c) 2003 IBM Corp.
+ * Dave Engebretsen engebret@us.ibm.com
+ * Santiago Leon santil@us.ibm.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _VIO_H
+#define _VIO_H
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <asm/hvcall.h>
+#include <asm/prom.h>
+#include <asm/scatterlist.h>
+/*
+ * Architecture-specific constants for drivers to
+ * extract attributes of the device using vio_get_attribute()
+*/
+#define VETH_MAC_ADDR "local-mac-address"
+#define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
+
+/* End architecture-specific constants */
+
+#define h_vio_signal(ua, mode) \
+ plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
+
+#define VIO_IRQ_DISABLE 0UL
+#define VIO_IRQ_ENABLE 1UL
+
+struct vio_dev;
+struct vio_driver;
+struct vio_device_id;
+struct TceTable;
+
+int vio_register_driver(struct vio_driver *drv);
+int vio_unregister_driver(struct vio_driver *drv);
+const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
+ const struct vio_dev *dev);
+struct vio_dev * __devinit vio_register_device(struct device_node *node_vdev);
+int __devinit vio_unregister_device(struct vio_dev *dev);
+const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length);
+int vio_get_irq(struct vio_dev *dev);
+struct TceTable * vio_build_tce_table(struct vio_dev *dev);
+int vio_enable_interrupts(struct vio_dev *dev);
+int vio_disable_interrupts(struct vio_dev *dev);
+
+dma_addr_t vio_map_single(struct vio_dev *dev, void *vaddr,
+ size_t size, int direction);
+void vio_unmap_single(struct vio_dev *dev, dma_addr_t dma_handle,
+ size_t size, int direction);
+int vio_map_sg(struct vio_dev *vdev, struct scatterlist *sglist,
+ int nelems, int direction);
+void vio_unmap_sg(struct vio_dev *vdev, struct scatterlist *sglist,
+ int nelems, int direction);
+void *vio_alloc_consistent(struct vio_dev *dev, size_t size,
+ dma_addr_t *dma_handle);
+void vio_free_consistent(struct vio_dev *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle);
+
+struct vio_device_id {
+ char *type;
+ char *compat;
+/* I don't think we need this
+ unsigned long driver_data; */ /* Data private to the driver */
+};
+
+struct vio_driver {
+ struct list_head node;
+ char *name;
+ const struct vio_device_id *id_table; /* NULL if wants all devices */
+ int (*probe) (struct vio_dev *dev, const struct vio_device_id *id); /* New device inserted */
+ void (*remove) (struct vio_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
+ unsigned long driver_data;
+};
+
+struct vio_bus;
+/*
+ * The vio_dev structure is used to describe virtual I/O devices.
+ */
+struct vio_dev {
+ struct list_head devices_list; /* node in list of all vio devices */
+ struct device_node *archdata; /* Open Firmware node */
+ struct vio_bus *bus; /* bus this device is on */
+ struct vio_driver *driver; /* owning driver */
+ void *driver_data; /* data private to the driver */
+ unsigned long unit_address;
+
+ struct TceTable *tce_table; /* vio_map_* uses this */
+ unsigned int irq;
+ struct proc_dir_entry *procent; /* device entry in /proc/bus/vio */
+};
+
+struct vio_bus {
+ struct list_head devices; /* list of virtual devices */
+};
+
+
+static inline int vio_module_init(struct vio_driver *drv)
+{
+ int rc = vio_register_driver (drv);
+
+ if (rc > 0)
+ return 0;
+
+ /* iff CONFIG_HOTPLUG and built into kernel, we should
+ * leave the driver around for future hotplug events.
+ * For the module case, a hotplug daemon of some sort
+ * should load a module in response to an insert event. */
+#if defined(CONFIG_HOTPLUG) && !defined(MODULE)
+ if (rc == 0)
+ return 0;
+#else
+ if (rc == 0)
+ rc = -ENODEV;
+#endif
+
+ /* if we get here, we need to clean up vio driver instance
+ * and return some sort of error */
+
+ return rc;
+}
+
+#endif /* _PHYP_H */
_