2005-04-16 16:20:36 -06:00
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/*
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* IBM PowerPC Virtual I/O Infrastructure Support.
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*
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* Copyright (c) 2003 IBM Corp.
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* Dave Engebretsen engebret@us.ibm.com
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* Santiago Leon santil@us.ibm.com
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* Hollis Blanchard <hollisb@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kobject.h>
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#include <linux/mm.h>
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#include <linux/dma-mapping.h>
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#include <asm/rtas.h>
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#include <asm/iommu.h>
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#include <asm/dma.h>
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#include <asm/ppcdebug.h>
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#include <asm/vio.h>
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#include <asm/hvcall.h>
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#include <asm/iSeries/vio.h>
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#include <asm/iSeries/HvTypes.h>
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#include <asm/iSeries/HvCallXm.h>
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#include <asm/iSeries/HvLpConfig.h>
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#define DBGENTER() pr_debug("%s entered\n", __FUNCTION__)
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extern struct subsystem devices_subsys; /* needed for vio_find_name() */
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static const struct vio_device_id *vio_match_device(
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const struct vio_device_id *, const struct vio_dev *);
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#ifdef CONFIG_PPC_PSERIES
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static struct iommu_table *vio_build_iommu_table(struct vio_dev *);
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static int vio_num_address_cells;
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#endif
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static struct vio_dev *vio_bus_device; /* fake "parent" device */
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#ifdef CONFIG_PPC_ISERIES
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static struct vio_dev *__init vio_register_device_iseries(char *type,
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uint32_t unit_num);
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static struct iommu_table veth_iommu_table;
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static struct iommu_table vio_iommu_table;
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static struct vio_dev _vio_dev = {
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.iommu_table = &vio_iommu_table,
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.dev.bus = &vio_bus_type
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};
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struct device *iSeries_vio_dev = &_vio_dev.dev;
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EXPORT_SYMBOL(iSeries_vio_dev);
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#define device_is_compatible(a, b) 1
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#endif
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/* convert from struct device to struct vio_dev and pass to driver.
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* dev->driver has already been set by generic code because vio_bus_match
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* succeeded. */
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static int vio_bus_probe(struct device *dev)
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{
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struct vio_dev *viodev = to_vio_dev(dev);
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struct vio_driver *viodrv = to_vio_driver(dev->driver);
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const struct vio_device_id *id;
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int error = -ENODEV;
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DBGENTER();
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if (!viodrv->probe)
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return error;
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id = vio_match_device(viodrv->id_table, viodev);
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if (id) {
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error = viodrv->probe(viodev, id);
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}
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return error;
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}
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/* convert from struct device to struct vio_dev and pass to driver. */
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static int vio_bus_remove(struct device *dev)
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{
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struct vio_dev *viodev = to_vio_dev(dev);
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struct vio_driver *viodrv = to_vio_driver(dev->driver);
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DBGENTER();
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if (viodrv->remove) {
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return viodrv->remove(viodev);
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}
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/* driver can't remove */
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return 1;
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}
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/**
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* vio_register_driver: - Register a new vio driver
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* @drv: The vio_driver structure to be registered.
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*/
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int vio_register_driver(struct vio_driver *viodrv)
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{
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printk(KERN_DEBUG "%s: driver %s registering\n", __FUNCTION__,
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viodrv->name);
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/* fill in 'struct driver' fields */
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viodrv->driver.name = viodrv->name;
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viodrv->driver.bus = &vio_bus_type;
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viodrv->driver.probe = vio_bus_probe;
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viodrv->driver.remove = vio_bus_remove;
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return driver_register(&viodrv->driver);
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}
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EXPORT_SYMBOL(vio_register_driver);
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/**
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* vio_unregister_driver - Remove registration of vio driver.
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* @driver: The vio_driver struct to be removed form registration
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*/
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void vio_unregister_driver(struct vio_driver *viodrv)
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{
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driver_unregister(&viodrv->driver);
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}
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EXPORT_SYMBOL(vio_unregister_driver);
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/**
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* vio_match_device: - Tell if a VIO device has a matching VIO device id structure.
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* @ids: array of VIO device id structures to search in
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* @dev: the VIO device structure to match against
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*
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* Used by a driver to check whether a VIO device present in the
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* system is in its list of supported devices. Returns the matching
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* vio_device_id structure or NULL if there is no match.
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*/
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static const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
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const struct vio_dev *dev)
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{
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DBGENTER();
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while (ids->type) {
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if ((strncmp(dev->type, ids->type, strlen(ids->type)) == 0) &&
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device_is_compatible(dev->dev.platform_data, ids->compat))
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return ids;
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ids++;
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}
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return NULL;
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}
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#ifdef CONFIG_PPC_ISERIES
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void __init iommu_vio_init(void)
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{
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struct iommu_table *t;
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struct iommu_table_cb cb;
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unsigned long cbp;
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unsigned long itc_entries;
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cb.itc_busno = 255; /* Bus 255 is the virtual bus */
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cb.itc_virtbus = 0xff; /* Ask for virtual bus */
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cbp = virt_to_abs(&cb);
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HvCallXm_getTceTableParms(cbp);
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itc_entries = cb.itc_size * PAGE_SIZE / sizeof(union tce_entry);
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veth_iommu_table.it_size = itc_entries / 2;
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veth_iommu_table.it_busno = cb.itc_busno;
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veth_iommu_table.it_offset = cb.itc_offset;
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veth_iommu_table.it_index = cb.itc_index;
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veth_iommu_table.it_type = TCE_VB;
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veth_iommu_table.it_blocksize = 1;
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t = iommu_init_table(&veth_iommu_table);
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if (!t)
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printk("Virtual Bus VETH TCE table failed.\n");
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vio_iommu_table.it_size = itc_entries - veth_iommu_table.it_size;
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vio_iommu_table.it_busno = cb.itc_busno;
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vio_iommu_table.it_offset = cb.itc_offset +
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veth_iommu_table.it_size;
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vio_iommu_table.it_index = cb.itc_index;
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vio_iommu_table.it_type = TCE_VB;
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vio_iommu_table.it_blocksize = 1;
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t = iommu_init_table(&vio_iommu_table);
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if (!t)
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printk("Virtual Bus VIO TCE table failed.\n");
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}
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#endif
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#ifdef CONFIG_PPC_PSERIES
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static void probe_bus_pseries(void)
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{
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struct device_node *node_vroot, *of_node;
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node_vroot = find_devices("vdevice");
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if ((node_vroot == NULL) || (node_vroot->child == NULL))
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/* this machine doesn't do virtual IO, and that's ok */
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return;
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vio_num_address_cells = prom_n_addr_cells(node_vroot->child);
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/*
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* Create struct vio_devices for each virtual device in the device tree.
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* Drivers will associate with them later.
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*/
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for (of_node = node_vroot->child; of_node != NULL;
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of_node = of_node->sibling) {
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printk(KERN_DEBUG "%s: processing %p\n", __FUNCTION__, of_node);
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vio_register_device_node(of_node);
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}
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}
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#endif
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#ifdef CONFIG_PPC_ISERIES
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static void probe_bus_iseries(void)
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{
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HvLpIndexMap vlan_map = HvLpConfig_getVirtualLanIndexMap();
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struct vio_dev *viodev;
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int i;
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/* there is only one of each of these */
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vio_register_device_iseries("viocons", 0);
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vio_register_device_iseries("vscsi", 0);
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vlan_map = HvLpConfig_getVirtualLanIndexMap();
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
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if ((vlan_map & (0x8000 >> i)) == 0)
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continue;
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viodev = vio_register_device_iseries("vlan", i);
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/* veth is special and has it own iommu_table */
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viodev->iommu_table = &veth_iommu_table;
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}
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
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vio_register_device_iseries("viodasd", i);
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
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vio_register_device_iseries("viocd", i);
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
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vio_register_device_iseries("viotape", i);
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}
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#endif
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/**
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* vio_bus_init: - Initialize the virtual IO bus
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*/
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static int __init vio_bus_init(void)
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{
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int err;
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err = bus_register(&vio_bus_type);
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if (err) {
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printk(KERN_ERR "failed to register VIO bus\n");
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return err;
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}
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/* the fake parent of all vio devices, just to give us a nice directory */
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vio_bus_device = kmalloc(sizeof(struct vio_dev), GFP_KERNEL);
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if (!vio_bus_device) {
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return 1;
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}
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memset(vio_bus_device, 0, sizeof(struct vio_dev));
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strcpy(vio_bus_device->dev.bus_id, "vio");
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err = device_register(&vio_bus_device->dev);
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if (err) {
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printk(KERN_WARNING "%s: device_register returned %i\n", __FUNCTION__,
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err);
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kfree(vio_bus_device);
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return err;
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}
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#ifdef CONFIG_PPC_PSERIES
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probe_bus_pseries();
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#endif
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#ifdef CONFIG_PPC_ISERIES
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probe_bus_iseries();
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#endif
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return 0;
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}
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__initcall(vio_bus_init);
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/* vio_dev refcount hit 0 */
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static void __devinit vio_dev_release(struct device *dev)
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{
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DBGENTER();
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#ifdef CONFIG_PPC_PSERIES
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/* XXX free TCE table */
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of_node_put(dev->platform_data);
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#endif
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kfree(to_vio_dev(dev));
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}
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#ifdef CONFIG_PPC_PSERIES
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2005-05-17 04:40:51 -06:00
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static ssize_t viodev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
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2005-04-16 16:20:36 -06:00
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{
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struct device_node *of_node = dev->platform_data;
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return sprintf(buf, "%s\n", of_node->full_name);
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}
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DEVICE_ATTR(devspec, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_devspec, NULL);
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#endif
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2005-05-17 04:40:51 -06:00
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static ssize_t viodev_show_name(struct device *dev, struct device_attribute *attr, char *buf)
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2005-04-16 16:20:36 -06:00
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{
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return sprintf(buf, "%s\n", to_vio_dev(dev)->name);
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}
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DEVICE_ATTR(name, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_name, NULL);
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static struct vio_dev * __devinit vio_register_device_common(
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struct vio_dev *viodev, char *name, char *type,
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uint32_t unit_address, struct iommu_table *iommu_table)
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{
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DBGENTER();
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viodev->name = name;
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viodev->type = type;
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viodev->unit_address = unit_address;
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viodev->iommu_table = iommu_table;
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/* init generic 'struct device' fields: */
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viodev->dev.parent = &vio_bus_device->dev;
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viodev->dev.bus = &vio_bus_type;
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viodev->dev.release = vio_dev_release;
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/* register with generic device framework */
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if (device_register(&viodev->dev)) {
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printk(KERN_ERR "%s: failed to register device %s\n",
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__FUNCTION__, viodev->dev.bus_id);
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return NULL;
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}
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device_create_file(&viodev->dev, &dev_attr_name);
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return viodev;
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}
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#ifdef CONFIG_PPC_PSERIES
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/**
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* vio_register_device_node: - Register a new vio device.
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* @of_node: The OF node for this device.
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*
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* Creates and initializes a vio_dev structure from the data in
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* of_node (dev.platform_data) and adds it to the list of virtual devices.
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* Returns a pointer to the created vio_dev or NULL if node has
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* NULL device_type or compatible fields.
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*/
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struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node)
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{
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|
|
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
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
return iommu_map_single(to_vio_dev(dev)->iommu_table, vaddr, size,
|
|
|
|
direction);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void vio_unmap_single(struct device *dev, dma_addr_t dma_handle,
|
|
|
|
size_t size, enum dma_data_direction direction)
|
|
|
|
{
|
|
|
|
iommu_unmap_single(to_vio_dev(dev)->iommu_table, dma_handle, size,
|
|
|
|
direction);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vio_map_sg(struct device *dev, struct scatterlist *sglist,
|
|
|
|
int nelems, enum dma_data_direction direction)
|
|
|
|
{
|
|
|
|
return iommu_map_sg(dev, to_vio_dev(dev)->iommu_table, sglist,
|
|
|
|
nelems, direction);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void vio_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
|
|
|
int nelems, enum dma_data_direction direction)
|
|
|
|
{
|
|
|
|
iommu_unmap_sg(to_vio_dev(dev)->iommu_table, sglist, nelems, direction);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void *vio_alloc_coherent(struct device *dev, size_t size,
|
|
|
|
dma_addr_t *dma_handle, unsigned int __nocast flag)
|
|
|
|
{
|
|
|
|
return iommu_alloc_coherent(to_vio_dev(dev)->iommu_table, size,
|
|
|
|
dma_handle, flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void vio_free_coherent(struct device *dev, size_t size,
|
|
|
|
void *vaddr, dma_addr_t dma_handle)
|
|
|
|
{
|
|
|
|
iommu_free_coherent(to_vio_dev(dev)->iommu_table, size, vaddr,
|
|
|
|
dma_handle);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vio_dma_supported(struct device *dev, u64 mask)
|
|
|
|
{
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct dma_mapping_ops vio_dma_ops = {
|
|
|
|
.alloc_coherent = vio_alloc_coherent,
|
|
|
|
.free_coherent = vio_free_coherent,
|
|
|
|
.map_single = vio_map_single,
|
|
|
|
.unmap_single = vio_unmap_single,
|
|
|
|
.map_sg = vio_map_sg,
|
|
|
|
.unmap_sg = vio_unmap_sg,
|
|
|
|
.dma_supported = vio_dma_supported,
|
|
|
|
};
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct bus_type vio_bus_type = {
|
|
|
|
.name = "vio",
|
|
|
|
.match = vio_bus_match,
|
|
|
|
};
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(vio_bus_type);
|