* 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>
-
-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 */
+#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>
+
+static struct bus_type vio_bus_type;
+
+static 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,
};
-static struct vio_bus_ops vio_bus_ops;
+static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
+{
+ const unsigned char *dma_window;
+ struct iommu_table *tbl;
+ unsigned long offset, size;
+
+ if (firmware_has_feature(FW_FEATURE_ISERIES))
+ return vio_build_iommu_table_iseries(dev);
+
+ dma_window = of_get_property(dev->dev.archdata.of_node,
+ "ibm,my-dma-window", NULL);
+ if (!dma_window)
+ return NULL;
+
+ tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
+
+ of_parse_dma_window(dev->dev.archdata.of_node, dma_window,
+ &tbl->it_index, &offset, &size);
+
+ /* TCE table size - measured in tce entries */
+ tbl->it_size = size >> IOMMU_PAGE_SHIFT;
+ /* offset for VIO should always be 0 */
+ tbl->it_offset = offset >> IOMMU_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) &&
+ of_device_is_compatible(dev->dev.archdata.of_node,
+ ids->compat))
+ return ids;
+ ids++;
+ }
+ return NULL;
+}
/*
* Convert from struct device to struct vio_dev and pass to driver.
return 1;
}
-/* convert from struct device to struct vio_dev and pass to driver. */
-static void vio_bus_shutdown(struct device *dev)
-{
- struct vio_dev *viodev = to_vio_dev(dev);
- struct vio_driver *viodrv = to_vio_driver(dev->driver);
-
- if (dev->driver && viodrv->shutdown)
- viodrv->shutdown(viodev);
-}
-
/**
* vio_register_driver: - Register a new vio driver
* @drv: The vio_driver structure to be registered.
*/
int vio_register_driver(struct vio_driver *viodrv)
{
- printk(KERN_DEBUG "%s: driver %s registering\n", __FUNCTION__,
+ printk(KERN_DEBUG "%s: driver %s registering\n", __func__,
viodrv->driver.name);
/* fill in 'struct driver' fields */
}
EXPORT_SYMBOL(vio_unregister_driver);
+/* vio_dev refcount hit 0 */
+static void __devinit vio_dev_release(struct device *dev)
+{
+ /* XXX should free TCE table */
+ of_node_put(dev->archdata.of_node);
+ kfree(to_vio_dev(dev));
+}
+
/**
- * vio_match_device: - Tell if a VIO device has a matching
- * VIO device id structure.
- * @ids: array of VIO device id structures to search in
- * @dev: the VIO device structure to match against
+ * vio_register_device_node: - Register a new vio device.
+ * @of_node: The OF node for this device.
*
- * 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.
+ * Creates and initializes a vio_dev structure from the data in
+ * of_node 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.
*/
-static const struct vio_device_id *vio_match_device(
- const struct vio_device_id *ids, const struct vio_dev *dev)
+struct vio_dev *vio_register_device_node(struct device_node *of_node)
{
- while (ids->type[0] != '\0') {
- if (vio_bus_ops.match(ids, dev))
- return ids;
- ids++;
+ struct vio_dev *viodev;
+ const 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",
+ __func__,
+ of_node->name ? of_node->name : "<unknown>");
+ return NULL;
}
- return NULL;
+
+ unit_address = of_get_property(of_node, "reg", NULL);
+ if (unit_address == NULL) {
+ printk(KERN_WARNING "%s: node %s missing 'reg'\n",
+ __func__,
+ 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->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 = of_get_property(of_node,
+ "linux,unit_address", NULL);
+ if (unit_address != NULL)
+ viodev->unit_address = *unit_address;
+ }
+ viodev->dev.archdata.of_node = of_node_get(of_node);
+ viodev->dev.archdata.dma_ops = &dma_iommu_ops;
+ viodev->dev.archdata.dma_data = vio_build_iommu_table(viodev);
+ viodev->dev.archdata.numa_node = of_node_to_nid(of_node);
+
+ /* 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",
+ __func__, viodev->dev.bus_id);
+ /* XXX free TCE table */
+ kfree(viodev);
+ return NULL;
+ }
+
+ return viodev;
}
+EXPORT_SYMBOL(vio_register_device_node);
/**
* vio_bus_init: - Initialize the virtual IO bus
*/
-int __init vio_bus_init(struct vio_bus_ops *ops)
+static int __init vio_bus_init(void)
{
int err;
-
- vio_bus_ops = *ops;
+ struct device_node *node_vroot;
err = bus_register(&vio_bus_type);
if (err) {
err = device_register(&vio_bus_device.dev);
if (err) {
printk(KERN_WARNING "%s: device_register returned %i\n",
- __FUNCTION__, err);
+ __func__, err);
return err;
}
- return 0;
-}
+ node_vroot = of_find_node_by_name(NULL, "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)
+ vio_register_device_node(of_node);
+ of_node_put(node_vroot);
+ }
-/* 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));
+ return 0;
}
+__initcall(vio_bus_init);
-static ssize_t viodev_show_name(struct device *dev,
+static ssize_t name_show(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);
-struct vio_dev * __devinit vio_register_device(struct vio_dev *viodev)
+static ssize_t devspec_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- /* init generic 'struct device' fields: */
- viodev->dev.parent = &vio_bus_device.dev;
- viodev->dev.bus = &vio_bus_type;
- viodev->dev.release = vio_dev_release;
+ struct device_node *of_node = dev->archdata.of_node;
- /* 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);
-
- return viodev;
+ 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
+};
+
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);
-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, gfp_t 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);
return (ids != NULL) && (vio_match_device(ids, vio_dev) != NULL);
}
-static int vio_hotplug(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int vio_hotplug(struct device *dev, struct kobj_uevent_env *env)
{
const struct vio_dev *vio_dev = to_vio_dev(dev);
- char *cp;
- int length;
-
- if (!num_envp)
- return -ENOMEM;
+ struct device_node *dn;
+ const char *cp;
- if (!vio_dev->dev.platform_data)
+ dn = dev->archdata.of_node;
+ if (!dn)
return -ENODEV;
- cp = (char *)get_property(vio_dev->dev.platform_data, "compatible", &length);
+ cp = of_get_property(dn, "compatible", NULL);
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)
- return -ENOMEM;
- envp[1] = NULL;
+ add_uevent_var(env, "MODALIAS=vio:T%sS%s", vio_dev->type, cp);
return 0;
}
-struct bus_type vio_bus_type = {
+static 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 of_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 of_get_property(vdev->dev.archdata.of_node, 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
+ */
+static struct vio_dev *vio_find_name(const char *name)
+{
+ struct device *found;
+
+ found = bus_find_device_by_name(&vio_bus_type, NULL, name);
+ if (!found)
+ return NULL;
+
+ return to_vio_dev(found);
+}
+
+/**
+ * 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)
+{
+ const uint32_t *unit_address;
+ char kobj_name[BUS_ID_SIZE];
+
+ /* construct the kobject name from the device node */
+ unit_address = of_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://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff