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authorRusty Russell <rusty@rustcorp.com.au>2007-10-22 11:03:39 +1000
committerRusty Russell <rusty@rustcorp.com.au>2007-10-23 15:49:55 +1000
commitb01d9f2863349b0e041b90c3c86a998ee0fed2b0 (patch)
tree8789a06631a0ee502c58388d12c230eb4a2059b2
parent31610434bc3523c0b01a10917a1185096a03c4c8 (diff)
downloadop-kernel-dev-b01d9f2863349b0e041b90c3c86a998ee0fed2b0.zip
op-kernel-dev-b01d9f2863349b0e041b90c3c86a998ee0fed2b0.tar.gz
Module autoprobing support for virtio drivers.
This adds the logic to convert the virtio ids into module aliases, and includes a modalias entry in sysfs and the env var to make probing work. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--drivers/virtio/virtio.c18
-rw-r--r--scripts/mod/file2alias.c18
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index f640e0b..15d7787 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -20,10 +20,19 @@ static ssize_t status_show(struct device *_d,
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
return sprintf(buf, "0x%08x", dev->config->get_status(dev));
}
+static ssize_t modalias_show(struct device *_d,
+ struct device_attribute *attr, char *buf)
+{
+ struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
+
+ return sprintf(buf, "virtio:d%08Xv%08X\n",
+ dev->id.device, dev->id.vendor);
+}
static struct device_attribute virtio_dev_attrs[] = {
__ATTR_RO(device),
__ATTR_RO(vendor),
__ATTR_RO(status),
+ __ATTR_RO(modalias),
__ATTR_NULL
};
@@ -51,10 +60,19 @@ static int virtio_dev_match(struct device *_dv, struct device_driver *_dr)
return 0;
}
+static int virtio_uevent(struct device *_dv, struct kobj_uevent_env *env)
+{
+ struct virtio_device *dev = container_of(_dv,struct virtio_device,dev);
+
+ return add_uevent_var(env, "MODALIAS=virtio:d%08Xv%08X",
+ dev->id.device, dev->id.vendor);
+}
+
static struct bus_type virtio_bus = {
.name = "virtio",
.match = virtio_dev_match,
.dev_attrs = virtio_dev_attrs,
+ .uevent = virtio_uevent,
};
static void add_status(struct virtio_device *dev, unsigned status)
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 91c15da..d802b5a 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -525,6 +525,20 @@ static int do_ssb_entry(const char *filename,
return 1;
}
+/* Looks like: virtio:dNvN */
+static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
+ char *alias)
+{
+ id->device = TO_NATIVE(id->device);
+ id->vendor = TO_NATIVE(id->vendor);
+
+ strcpy(alias, "virtio:");
+ ADD(alias, "d", 1, id->device);
+ ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor);
+
+ return 1;
+}
+
/* Ignore any prefix, eg. v850 prepends _ */
static inline int sym_is(const char *symbol, const char *name)
{
@@ -651,6 +665,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
do_table(symval, sym->st_size,
sizeof(struct ssb_device_id), "ssb",
do_ssb_entry, mod);
+ else if (sym_is(symname, "__mod_virtio_device_table"))
+ do_table(symval, sym->st_size,
+ sizeof(struct virtio_device_id), "virtio",
+ do_virtio_entry, mod);
free(zeros);
}
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