2005-04-17 06:20:36 +08:00
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/*
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* IBM PowerPC Virtual I/O Infrastructure Support.
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*
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2005-07-12 15:50:26 +08:00
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* Copyright (c) 2003-2005 IBM Corp.
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2005-04-17 06:20:36 +08:00
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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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2005-07-12 15:50:26 +08:00
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* Stephen Rothwell
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2005-04-17 06:20:36 +08:00
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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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2006-04-27 15:23:32 +08:00
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#include <linux/types.h>
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#include <linux/device.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/dma-mapping.h>
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2006-04-27 15:23:32 +08:00
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#include <linux/kobject.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/iommu.h>
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#include <asm/dma.h>
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#include <asm/vio.h>
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2005-11-09 13:34:36 +08:00
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#include <asm/prom.h>
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2006-04-27 15:18:21 +08:00
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#include <asm/firmware.h>
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2006-04-27 15:23:32 +08:00
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#include <asm/tce.h>
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#include <asm/abs_addr.h>
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#include <asm/page.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/hv_types.h>
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#include <asm/iseries/hv_lp_config.h>
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#include <asm/iseries/hv_call_xm.h>
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#include <asm/iseries/iommu.h>
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2007-09-21 12:32:05 +08:00
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static struct bus_type vio_bus_type;
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2006-04-27 15:23:32 +08:00
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static struct vio_dev vio_bus_device = { /* fake "parent" device */
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2005-06-22 08:15:54 +08:00
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.name = vio_bus_device.dev.bus_id,
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.type = "",
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.dev.bus_id = "vio",
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.dev.bus = &vio_bus_type,
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2005-04-17 06:20:36 +08:00
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};
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2005-06-22 08:15:54 +08:00
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2006-04-27 15:23:32 +08:00
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static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
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{
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2007-10-11 12:55:02 +08:00
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const unsigned char *dma_window;
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struct iommu_table *tbl;
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unsigned long offset, size;
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if (firmware_has_feature(FW_FEATURE_ISERIES))
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return vio_build_iommu_table_iseries(dev);
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2006-04-27 15:23:32 +08:00
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2007-10-11 12:55:02 +08:00
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dma_window = of_get_property(dev->dev.archdata.of_node,
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"ibm,my-dma-window", NULL);
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if (!dma_window)
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return NULL;
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2006-04-27 15:23:32 +08:00
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2007-10-11 12:55:02 +08:00
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tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
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2006-04-27 15:23:32 +08:00
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2007-10-11 12:55:02 +08:00
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of_parse_dma_window(dev->dev.archdata.of_node, dma_window,
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&tbl->it_index, &offset, &size);
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2006-04-27 15:23:32 +08:00
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2007-10-11 12:55:02 +08:00
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/* TCE table size - measured in tce entries */
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tbl->it_size = size >> IOMMU_PAGE_SHIFT;
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/* offset for VIO should always be 0 */
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tbl->it_offset = offset >> IOMMU_PAGE_SHIFT;
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tbl->it_busno = 0;
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tbl->it_type = TCE_VB;
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2006-04-27 15:23:32 +08:00
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2007-10-11 12:55:02 +08:00
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return iommu_init_table(tbl, -1);
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2006-04-27 15:23:32 +08:00
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}
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2005-04-17 06:20:36 +08:00
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2006-04-27 15:18:21 +08:00
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/**
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* vio_match_device: - Tell if a VIO device has a matching
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* 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(
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const struct vio_device_id *ids, const struct vio_dev *dev)
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{
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while (ids->type[0] != '\0') {
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2006-04-27 15:21:46 +08:00
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if ((strncmp(dev->type, ids->type, strlen(ids->type)) == 0) &&
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2007-05-03 15:26:52 +08:00
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of_device_is_compatible(dev->dev.archdata.of_node,
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2006-11-11 14:25:02 +08:00
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ids->compat))
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2006-04-27 15:18:21 +08:00
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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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2005-08-17 14:37:35 +08:00
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/*
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* Convert from struct device to struct vio_dev and pass to driver.
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2005-04-17 06:20:36 +08:00
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* dev->driver has already been set by generic code because vio_bus_match
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2005-08-17 14:37:35 +08:00
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* succeeded.
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*/
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2005-04-17 06:20:36 +08:00
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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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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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2005-08-17 14:37:35 +08:00
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if (id)
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2005-04-17 06:20:36 +08:00
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error = viodrv->probe(viodev, id);
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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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2005-08-17 14:37:35 +08:00
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if (viodrv->remove)
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2005-04-17 06:20:36 +08:00
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return viodrv->remove(viodev);
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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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2008-03-29 05:21:07 +08:00
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printk(KERN_DEBUG "%s: driver %s registering\n", __func__,
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2005-10-24 12:53:21 +08:00
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viodrv->driver.name);
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2005-04-17 06:20:36 +08:00
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/* fill in 'struct driver' fields */
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viodrv->driver.bus = &vio_bus_type;
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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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2006-04-27 15:23:32 +08:00
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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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2007-01-02 19:38:36 +08:00
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/* XXX should free TCE table */
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of_node_put(dev->archdata.of_node);
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2006-04-27 15:23:32 +08:00
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kfree(to_vio_dev(dev));
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}
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2005-04-17 06:20:36 +08:00
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/**
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2006-04-27 15:18:21 +08:00
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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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2005-04-17 06:20:36 +08:00
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*
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2006-04-27 15:18:21 +08:00
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* Creates and initializes a vio_dev structure from the data in
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2006-11-11 14:25:02 +08:00
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* of_node and adds it to the list of virtual devices.
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2006-04-27 15:18:21 +08:00
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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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2005-04-17 06:20:36 +08:00
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*/
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2008-02-05 11:15:12 +08:00
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struct vio_dev *vio_register_device_node(struct device_node *of_node)
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2005-04-17 06:20:36 +08:00
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{
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2006-04-27 15:18:21 +08:00
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struct vio_dev *viodev;
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2006-07-12 13:35:54 +08:00
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const unsigned int *unit_address;
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2006-04-27 15:18:21 +08:00
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/* we need the 'device_type' property, in order to match with drivers */
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if (of_node->type == NULL) {
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printk(KERN_WARNING "%s: node %s missing 'device_type'\n",
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2008-03-29 05:21:07 +08:00
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__func__,
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2006-04-27 15:18:21 +08:00
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of_node->name ? of_node->name : "<unknown>");
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return NULL;
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2005-04-17 06:20:36 +08:00
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}
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2006-04-27 15:18:21 +08:00
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2007-04-03 20:26:41 +08:00
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unit_address = of_get_property(of_node, "reg", NULL);
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2006-04-27 15:18:21 +08:00
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if (unit_address == NULL) {
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printk(KERN_WARNING "%s: node %s missing 'reg'\n",
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2008-03-29 05:21:07 +08:00
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__func__,
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2006-04-27 15:18:21 +08:00
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of_node->name ? of_node->name : "<unknown>");
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return NULL;
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}
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/* allocate a vio_dev for this node */
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viodev = kzalloc(sizeof(struct vio_dev), GFP_KERNEL);
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if (viodev == NULL)
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return NULL;
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2006-07-03 19:36:01 +08:00
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viodev->irq = irq_of_parse_and_map(of_node, 0);
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2006-04-27 15:18:21 +08:00
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snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address);
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viodev->name = of_node->name;
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viodev->type = of_node->type;
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viodev->unit_address = *unit_address;
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if (firmware_has_feature(FW_FEATURE_ISERIES)) {
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2007-04-03 20:26:41 +08:00
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unit_address = of_get_property(of_node,
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2006-04-27 15:18:21 +08:00
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"linux,unit_address", NULL);
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if (unit_address != NULL)
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viodev->unit_address = *unit_address;
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}
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2006-11-11 14:25:02 +08:00
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viodev->dev.archdata.of_node = of_node_get(of_node);
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viodev->dev.archdata.dma_ops = &dma_iommu_ops;
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viodev->dev.archdata.dma_data = vio_build_iommu_table(viodev);
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viodev->dev.archdata.numa_node = of_node_to_nid(of_node);
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2006-04-27 15:23:32 +08:00
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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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2006-04-27 15:18:21 +08:00
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/* register with generic device framework */
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2006-04-27 15:23:32 +08:00
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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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2008-03-29 05:21:07 +08:00
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__func__, viodev->dev.bus_id);
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2006-04-27 15:18:21 +08:00
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/* XXX free TCE table */
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kfree(viodev);
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return NULL;
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}
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return viodev;
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2005-04-17 06:20:36 +08:00
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}
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2006-04-27 15:18:21 +08:00
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EXPORT_SYMBOL(vio_register_device_node);
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2005-04-17 06:20:36 +08:00
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/**
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* vio_bus_init: - Initialize the virtual IO bus
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*/
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2006-04-27 15:23:32 +08:00
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static int __init vio_bus_init(void)
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2005-04-17 06:20:36 +08:00
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{
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int err;
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2006-04-27 15:18:21 +08:00
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struct device_node *node_vroot;
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2005-04-17 06:20:36 +08:00
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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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2005-08-17 14:37:35 +08:00
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/*
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* The fake parent of all vio devices, just to give us
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2005-07-12 15:40:17 +08:00
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* a nice directory
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*/
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2005-06-22 08:15:54 +08:00
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err = device_register(&vio_bus_device.dev);
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2005-04-17 06:20:36 +08:00
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if (err) {
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2005-07-12 15:40:17 +08:00
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printk(KERN_WARNING "%s: device_register returned %i\n",
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2008-03-29 05:21:07 +08:00
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__func__, err);
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2005-04-17 06:20:36 +08:00
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return err;
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}
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2007-04-24 11:53:04 +08:00
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node_vroot = of_find_node_by_name(NULL, "vdevice");
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2006-04-27 15:18:21 +08:00
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if (node_vroot) {
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struct device_node *of_node;
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/*
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* Create struct vio_devices for each virtual device in
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* the device tree. 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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2007-09-21 12:29:28 +08:00
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of_node = of_node->sibling)
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2006-04-27 15:18:21 +08:00
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vio_register_device_node(of_node);
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2007-04-24 11:53:04 +08:00
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of_node_put(node_vroot);
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2006-04-27 15:18:21 +08:00
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}
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2005-07-12 15:40:17 +08:00
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return 0;
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}
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2006-04-27 15:23:32 +08:00
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__initcall(vio_bus_init);
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2005-04-17 06:20:36 +08:00
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2006-04-27 15:18:21 +08:00
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static ssize_t name_show(struct device *dev,
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2005-08-17 14:37:35 +08:00
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struct device_attribute *attr, char *buf)
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2005-04-17 06:20:36 +08:00
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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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2006-04-27 15:18:21 +08:00
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static ssize_t devspec_show(struct device *dev,
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struct device_attribute *attr, char *buf)
|
|
|
|
{
|
2006-11-11 14:25:02 +08:00
|
|
|
struct device_node *of_node = dev->archdata.of_node;
|
2006-04-27 15:18:21 +08:00
|
|
|
|
|
|
|
return sprintf(buf, "%s\n", of_node ? of_node->full_name : "none");
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct device_attribute vio_dev_attrs[] = {
|
|
|
|
__ATTR_RO(name),
|
|
|
|
__ATTR_RO(devspec),
|
|
|
|
__ATTR_NULL
|
|
|
|
};
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
void __devinit vio_unregister_device(struct vio_dev *viodev)
|
|
|
|
{
|
|
|
|
device_unregister(&viodev->dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(vio_unregister_device);
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
2005-08-17 14:37:35 +08:00
|
|
|
return (ids != NULL) && (vio_match_device(ids, vio_dev) != NULL);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-08-14 21:15:12 +08:00
|
|
|
static int vio_hotplug(struct device *dev, struct kobj_uevent_env *env)
|
2005-11-09 13:34:36 +08:00
|
|
|
{
|
|
|
|
const struct vio_dev *vio_dev = to_vio_dev(dev);
|
2006-11-11 14:25:02 +08:00
|
|
|
struct device_node *dn;
|
2006-07-12 13:35:54 +08:00
|
|
|
const char *cp;
|
2005-11-09 13:34:36 +08:00
|
|
|
|
2006-11-11 14:25:02 +08:00
|
|
|
dn = dev->archdata.of_node;
|
2006-04-27 15:18:21 +08:00
|
|
|
if (!dn)
|
2005-11-09 13:34:36 +08:00
|
|
|
return -ENODEV;
|
2007-08-14 21:15:12 +08:00
|
|
|
cp = of_get_property(dn, "compatible", NULL);
|
2005-11-09 13:34:36 +08:00
|
|
|
if (!cp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2007-08-14 21:15:12 +08:00
|
|
|
add_uevent_var(env, "MODALIAS=vio:T%sS%s", vio_dev->type, cp);
|
2005-11-09 13:34:36 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-09-21 12:32:05 +08:00
|
|
|
static struct bus_type vio_bus_type = {
|
2005-04-17 06:20:36 +08:00
|
|
|
.name = "vio",
|
2006-04-27 15:18:21 +08:00
|
|
|
.dev_attrs = vio_dev_attrs,
|
2005-11-16 16:00:00 +08:00
|
|
|
.uevent = vio_hotplug,
|
2005-04-17 06:20:36 +08:00
|
|
|
.match = vio_bus_match,
|
2006-01-05 22:36:47 +08:00
|
|
|
.probe = vio_bus_probe,
|
|
|
|
.remove = vio_bus_remove,
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
2006-04-27 15:18:21 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* 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).
|
|
|
|
*
|
2007-04-03 20:26:41 +08:00
|
|
|
* Calls prom.c's of_get_property() to return the value of the
|
2006-04-27 15:18:21 +08:00
|
|
|
* attribute specified by @which
|
|
|
|
*/
|
|
|
|
const void *vio_get_attribute(struct vio_dev *vdev, char *which, int *length)
|
|
|
|
{
|
2007-04-03 20:26:41 +08:00
|
|
|
return of_get_property(vdev->dev.archdata.of_node, which, length);
|
2006-04-27 15:18:21 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(vio_get_attribute);
|
2006-04-27 15:23:32 +08:00
|
|
|
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
|
|
/* vio_find_name() - internal because only vio.c knows how we formatted the
|
|
|
|
* kobject name
|
|
|
|
*/
|
2008-01-27 08:45:30 +08:00
|
|
|
static struct vio_dev *vio_find_name(const char *name)
|
2006-04-27 15:23:32 +08:00
|
|
|
{
|
2008-01-27 08:45:30 +08:00
|
|
|
struct device *found;
|
2006-04-27 15:23:32 +08:00
|
|
|
|
2008-01-27 08:45:30 +08:00
|
|
|
found = bus_find_device_by_name(&vio_bus_type, NULL, name);
|
2006-04-27 15:23:32 +08:00
|
|
|
if (!found)
|
|
|
|
return NULL;
|
|
|
|
|
2008-01-27 08:45:30 +08:00
|
|
|
return to_vio_dev(found);
|
2006-04-27 15:23:32 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
2006-07-12 13:35:54 +08:00
|
|
|
const uint32_t *unit_address;
|
2006-04-27 15:23:32 +08:00
|
|
|
char kobj_name[BUS_ID_SIZE];
|
|
|
|
|
|
|
|
/* construct the kobject name from the device node */
|
2007-04-03 20:26:41 +08:00
|
|
|
unit_address = of_get_property(vnode, "reg", NULL);
|
2006-04-27 15:23:32 +08:00
|
|
|
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);
|
|
|
|
|
|
|
|
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 /* CONFIG_PPC_PSERIES */
|