* 2 of the License, or (at your option) any later version.
*/
-#include <linux/types.h>
-#include <linux/device.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
-#include <linux/kobject.h>
-
#include <asm/iommu.h>
#include <asm/dma.h>
#include <asm/vio.h>
#include <asm/prom.h>
-#include <asm/firmware.h>
-#include <asm/tce.h>
-#include <asm/abs_addr.h>
-#include <asm/page.h>
-#include <asm/hvcall.h>
-#include <asm/iseries/vio.h>
-#include <asm/iseries/hv_types.h>
-#include <asm/iseries/hv_lp_config.h>
-#include <asm/iseries/hv_call_xm.h>
-#include <asm/iseries/iommu.h>
-
-extern struct subsystem devices_subsys; /* needed for vio_find_name() */
-
-static struct vio_dev vio_bus_device = { /* fake "parent" device */
+
+static const struct vio_device_id *vio_match_device(
+ const struct vio_device_id *, const struct vio_dev *);
+
+struct vio_dev vio_bus_device = { /* fake "parent" device */
.name = vio_bus_device.dev.bus_id,
.type = "",
.dev.bus_id = "vio",
.dev.bus = &vio_bus_type,
};
-#ifdef CONFIG_PPC_ISERIES
-struct device *iSeries_vio_dev = &vio_bus_device.dev;
-EXPORT_SYMBOL(iSeries_vio_dev);
-
-static struct iommu_table veth_iommu_table;
-static struct iommu_table vio_iommu_table;
-
-static void __init iommu_vio_init(void)
-{
- iommu_table_getparms_iSeries(255, 0, 0xff, &veth_iommu_table);
- veth_iommu_table.it_size /= 2;
- vio_iommu_table = veth_iommu_table;
- vio_iommu_table.it_offset += veth_iommu_table.it_size;
-
- if (!iommu_init_table(&veth_iommu_table, -1))
- printk("Virtual Bus VETH TCE table failed.\n");
- if (!iommu_init_table(&vio_iommu_table, -1))
- printk("Virtual Bus VIO TCE table failed.\n");
-}
-#endif
-
-static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
-{
-#ifdef CONFIG_PPC_ISERIES
- if (firmware_has_feature(FW_FEATURE_ISERIES)) {
- if (strcmp(dev->type, "network") == 0)
- return &veth_iommu_table;
- return &vio_iommu_table;
- } else
-#endif
- {
- unsigned char *dma_window;
- struct iommu_table *tbl;
- unsigned long offset, size;
-
- dma_window = get_property(dev->dev.platform_data,
- "ibm,my-dma-window", NULL);
- if (!dma_window)
- return NULL;
-
- tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
-
- of_parse_dma_window(dev->dev.platform_data, dma_window,
- &tbl->it_index, &offset, &size);
-
- /* TCE table size - measured in tce entries */
- tbl->it_size = size >> PAGE_SHIFT;
- /* offset for VIO should always be 0 */
- tbl->it_offset = offset >> PAGE_SHIFT;
- tbl->it_busno = 0;
- tbl->it_type = TCE_VB;
-
- return iommu_init_table(tbl, -1);
- }
-}
-
-/**
- * vio_match_device: - Tell if a VIO device has a matching
- * VIO device id structure.
- * @ids: array of VIO device id structures to search in
- * @dev: the VIO device structure to match against
- *
- * Used by a driver to check whether a VIO device present in the
- * system is in its list of supported devices. Returns the matching
- * vio_device_id structure or NULL if there is no match.
- */
-static const struct vio_device_id *vio_match_device(
- const struct vio_device_id *ids, const struct vio_dev *dev)
-{
- while (ids->type[0] != '\0') {
- if ((strncmp(dev->type, ids->type, strlen(ids->type)) == 0) &&
- device_is_compatible(dev->dev.platform_data, ids->compat))
- return ids;
- ids++;
- }
- return NULL;
-}
+static struct vio_bus_ops vio_bus_ops;
/*
* Convert from struct device to struct vio_dev and pass to driver.
}
EXPORT_SYMBOL(vio_unregister_driver);
-/* vio_dev refcount hit 0 */
-static void __devinit vio_dev_release(struct device *dev)
-{
- if (dev->platform_data) {
- /* XXX free TCE table */
- of_node_put(dev->platform_data);
- }
- kfree(to_vio_dev(dev));
-}
-
/**
- * vio_register_device_node: - Register a new vio device.
- * @of_node: The OF node for this device.
+ * 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
*
- * Creates and initializes a vio_dev structure from the data in
- * of_node (dev.platform_data) and adds it to the list of virtual devices.
- * Returns a pointer to the created vio_dev or NULL if node has
- * NULL device_type or compatible fields.
+ * 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.
*/
-struct vio_dev * __devinit vio_register_device_node(struct device_node *of_node)
+static const struct vio_device_id *vio_match_device(
+ const struct vio_device_id *ids, const struct vio_dev *dev)
{
- struct vio_dev *viodev;
- unsigned int *unit_address;
-
- /* we need the 'device_type' property, in order to match with drivers */
- if (of_node->type == NULL) {
- 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 == NULL) {
- 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 = kzalloc(sizeof(struct vio_dev), GFP_KERNEL);
- if (viodev == NULL)
- return NULL;
-
- viodev->dev.platform_data = of_node_get(of_node);
-
- viodev->irq = irq_of_parse_and_map(of_node, 0);
-
- snprintf(viodev->dev.bus_id, BUS_ID_SIZE, "%x", *unit_address);
- viodev->name = of_node->name;
- viodev->type = of_node->type;
- viodev->unit_address = *unit_address;
- if (firmware_has_feature(FW_FEATURE_ISERIES)) {
- unit_address = (unsigned int *)get_property(of_node,
- "linux,unit_address", NULL);
- if (unit_address != NULL)
- viodev->unit_address = *unit_address;
- }
- viodev->iommu_table = vio_build_iommu_table(viodev);
-
- /* init generic 'struct device' fields: */
- viodev->dev.parent = &vio_bus_device.dev;
- viodev->dev.bus = &vio_bus_type;
- viodev->dev.release = vio_dev_release;
-
- /* register with generic device framework */
- if (device_register(&viodev->dev)) {
- printk(KERN_ERR "%s: failed to register device %s\n",
- __FUNCTION__, viodev->dev.bus_id);
- /* XXX free TCE table */
- kfree(viodev);
- return NULL;
+ while (ids->type[0] != '\0') {
+ if (vio_bus_ops.match(ids, dev))
+ return ids;
+ ids++;
}
-
- return viodev;
+ return NULL;
}
-EXPORT_SYMBOL(vio_register_device_node);
/**
* vio_bus_init: - Initialize the virtual IO bus
*/
-static int __init vio_bus_init(void)
+int __init vio_bus_init(struct vio_bus_ops *ops)
{
int err;
- struct device_node *node_vroot;
-#ifdef CONFIG_PPC_ISERIES
- if (firmware_has_feature(FW_FEATURE_ISERIES)) {
- iommu_vio_init();
- vio_bus_device.iommu_table = &vio_iommu_table;
- iSeries_vio_dev = &vio_bus_device.dev;
- }
-#endif
+ vio_bus_ops = *ops;
err = bus_register(&vio_bus_type);
if (err) {
return err;
}
- node_vroot = find_devices("vdevice");
- if (node_vroot) {
- struct device_node *of_node;
-
- /*
- * Create struct vio_devices for each virtual device in
- * the device tree. Drivers will associate with them later.
- */
- for (of_node = node_vroot->child; of_node != NULL;
- of_node = of_node->sibling) {
- printk(KERN_DEBUG "%s: processing %p\n",
- __FUNCTION__, of_node);
- vio_register_device_node(of_node);
- }
- }
-
return 0;
}
-__initcall(vio_bus_init);
-static ssize_t name_show(struct device *dev,
+/* vio_dev refcount hit 0 */
+static void __devinit vio_dev_release(struct device *dev)
+{
+ if (vio_bus_ops.release_device)
+ vio_bus_ops.release_device(dev);
+ kfree(to_vio_dev(dev));
+}
+
+static ssize_t viodev_show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", to_vio_dev(dev)->name);
}
+DEVICE_ATTR(name, S_IRUSR | S_IRGRP | S_IROTH, viodev_show_name, NULL);
-static ssize_t devspec_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+struct vio_dev * __devinit vio_register_device(struct vio_dev *viodev)
{
- struct device_node *of_node = dev->platform_data;
+ /* init generic 'struct device' fields: */
+ viodev->dev.parent = &vio_bus_device.dev;
+ viodev->dev.bus = &vio_bus_type;
+ viodev->dev.release = vio_dev_release;
- return sprintf(buf, "%s\n", of_node ? of_node->full_name : "none");
-}
+ /* register with generic device framework */
+ if (device_register(&viodev->dev)) {
+ printk(KERN_ERR "%s: failed to register device %s\n",
+ __FUNCTION__, viodev->dev.bus_id);
+ return NULL;
+ }
+ device_create_file(&viodev->dev, &dev_attr_name);
-static struct device_attribute vio_dev_attrs[] = {
- __ATTR_RO(name),
- __ATTR_RO(devspec),
- __ATTR_NULL
-};
+ return viodev;
+}
void __devinit vio_unregister_device(struct vio_dev *viodev)
{
+ if (vio_bus_ops.unregister_device)
+ vio_bus_ops.unregister_device(viodev);
+ device_remove_file(&viodev->dev, &dev_attr_name);
device_unregister(&viodev->dev);
}
EXPORT_SYMBOL(vio_unregister_device);
size_t size, enum dma_data_direction direction)
{
return iommu_map_single(to_vio_dev(dev)->iommu_table, vaddr, size,
- ~0ul, direction);
+ direction);
}
static void vio_unmap_single(struct device *dev, dma_addr_t dma_handle,
int nelems, enum dma_data_direction direction)
{
return iommu_map_sg(dev, to_vio_dev(dev)->iommu_table, sglist,
- nelems, ~0ul, direction);
+ nelems, direction);
}
static void vio_unmap_sg(struct device *dev, struct scatterlist *sglist,
dma_addr_t *dma_handle, gfp_t flag)
{
return iommu_alloc_coherent(to_vio_dev(dev)->iommu_table, size,
- dma_handle, ~0ul, flag, -1);
+ dma_handle, flag);
}
static void vio_free_coherent(struct device *dev, size_t size,
char *buffer, int buffer_size)
{
const struct vio_dev *vio_dev = to_vio_dev(dev);
- struct device_node *dn = dev->platform_data;
char *cp;
int length;
if (!num_envp)
return -ENOMEM;
- if (!dn)
+ if (!vio_dev->dev.platform_data)
return -ENODEV;
- cp = (char *)get_property(dn, "compatible", &length);
+ cp = (char *)get_property(vio_dev->dev.platform_data, "compatible", &length);
if (!cp)
return -ENODEV;
envp[0] = buffer;
length = scnprintf(buffer, buffer_size, "MODALIAS=vio:T%sS%s",
vio_dev->type, cp);
- if ((buffer_size - length) <= 0)
+ if (buffer_size - length <= 0)
return -ENOMEM;
envp[1] = NULL;
return 0;
struct bus_type vio_bus_type = {
.name = "vio",
- .dev_attrs = vio_dev_attrs,
.uevent = vio_hotplug,
.match = vio_bus_match,
.probe = vio_bus_probe,
.remove = vio_bus_remove,
.shutdown = vio_bus_shutdown,
};
-
-/**
- * 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 @which
-*/
-const void *vio_get_attribute(struct vio_dev *vdev, char *which, int *length)
-{
- return get_property(vdev->dev.platform_data, which, length);
-}
-EXPORT_SYMBOL(vio_get_attribute);
-
-#ifdef CONFIG_PPC_PSERIES
-/* 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);
-
-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 */
git://git.onelab.eu / linux-2.6.git / blobdiff