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path: root/drivers/uio
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Diffstat (limited to 'drivers/uio')
-rw-r--r--drivers/uio/uio.c159
1 files changed, 142 insertions, 17 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 2d2440cd57a9..4ca85a113aa2 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -35,6 +35,7 @@ struct uio_device {
int vma_count;
struct uio_info *info;
struct kobject *map_dir;
+ struct kobject *portio_dir;
};
static int uio_major;
@@ -75,17 +76,17 @@ static ssize_t map_offset_show(struct uio_mem *mem, char *buf)
return sprintf(buf, "0x%lx\n", mem->addr & ~PAGE_MASK);
}
-struct uio_sysfs_entry {
+struct map_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct uio_mem *, char *);
ssize_t (*store)(struct uio_mem *, const char *, size_t);
};
-static struct uio_sysfs_entry addr_attribute =
+static struct map_sysfs_entry addr_attribute =
__ATTR(addr, S_IRUGO, map_addr_show, NULL);
-static struct uio_sysfs_entry size_attribute =
+static struct map_sysfs_entry size_attribute =
__ATTR(size, S_IRUGO, map_size_show, NULL);
-static struct uio_sysfs_entry offset_attribute =
+static struct map_sysfs_entry offset_attribute =
__ATTR(offset, S_IRUGO, map_offset_show, NULL);
static struct attribute *attrs[] = {
@@ -106,9 +107,9 @@ static ssize_t map_type_show(struct kobject *kobj, struct attribute *attr,
{
struct uio_map *map = to_map(kobj);
struct uio_mem *mem = map->mem;
- struct uio_sysfs_entry *entry;
+ struct map_sysfs_entry *entry;
- entry = container_of(attr, struct uio_sysfs_entry, attr);
+ entry = container_of(attr, struct map_sysfs_entry, attr);
if (!entry->show)
return -EIO;
@@ -116,16 +117,93 @@ static ssize_t map_type_show(struct kobject *kobj, struct attribute *attr,
return entry->show(mem, buf);
}
-static struct sysfs_ops uio_sysfs_ops = {
+static struct sysfs_ops map_sysfs_ops = {
.show = map_type_show,
};
static struct kobj_type map_attr_type = {
.release = map_release,
- .sysfs_ops = &uio_sysfs_ops,
+ .sysfs_ops = &map_sysfs_ops,
.default_attrs = attrs,
};
+struct uio_portio {
+ struct kobject kobj;
+ struct uio_port *port;
+};
+#define to_portio(portio) container_of(portio, struct uio_portio, kobj)
+
+static ssize_t portio_start_show(struct uio_port *port, char *buf)
+{
+ return sprintf(buf, "0x%lx\n", port->start);
+}
+
+static ssize_t portio_size_show(struct uio_port *port, char *buf)
+{
+ return sprintf(buf, "0x%lx\n", port->size);
+}
+
+static ssize_t portio_porttype_show(struct uio_port *port, char *buf)
+{
+ const char *porttypes[] = {"none", "x86", "gpio", "other"};
+
+ if ((port->porttype < 0) || (port->porttype > UIO_PORT_OTHER))
+ return -EINVAL;
+
+ return sprintf(buf, "port_%s\n", porttypes[port->porttype]);
+}
+
+struct portio_sysfs_entry {
+ struct attribute attr;
+ ssize_t (*show)(struct uio_port *, char *);
+ ssize_t (*store)(struct uio_port *, const char *, size_t);
+};
+
+static struct portio_sysfs_entry portio_start_attribute =
+ __ATTR(start, S_IRUGO, portio_start_show, NULL);
+static struct portio_sysfs_entry portio_size_attribute =
+ __ATTR(size, S_IRUGO, portio_size_show, NULL);
+static struct portio_sysfs_entry portio_porttype_attribute =
+ __ATTR(porttype, S_IRUGO, portio_porttype_show, NULL);
+
+static struct attribute *portio_attrs[] = {
+ &portio_start_attribute.attr,
+ &portio_size_attribute.attr,
+ &portio_porttype_attribute.attr,
+ NULL,
+};
+
+static void portio_release(struct kobject *kobj)
+{
+ struct uio_portio *portio = to_portio(kobj);
+ kfree(portio);
+}
+
+static ssize_t portio_type_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct uio_portio *portio = to_portio(kobj);
+ struct uio_port *port = portio->port;
+ struct portio_sysfs_entry *entry;
+
+ entry = container_of(attr, struct portio_sysfs_entry, attr);
+
+ if (!entry->show)
+ return -EIO;
+
+ return entry->show(port, buf);
+}
+
+static struct sysfs_ops portio_sysfs_ops = {
+ .show = portio_type_show,
+};
+
+static struct kobj_type portio_attr_type = {
+ .release = portio_release,
+ .sysfs_ops = &portio_sysfs_ops,
+ .default_attrs = portio_attrs,
+};
+
static ssize_t show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -177,10 +255,13 @@ static struct attribute_group uio_attr_grp = {
static int uio_dev_add_attributes(struct uio_device *idev)
{
int ret;
- int mi;
+ int mi, pi;
int map_found = 0;
+ int portio_found = 0;
struct uio_mem *mem;
struct uio_map *map;
+ struct uio_port *port;
+ struct uio_portio *portio;
ret = sysfs_create_group(&idev->dev->kobj, &uio_attr_grp);
if (ret)
@@ -195,25 +276,58 @@ static int uio_dev_add_attributes(struct uio_device *idev)
idev->map_dir = kobject_create_and_add("maps",
&idev->dev->kobj);
if (!idev->map_dir)
- goto err;
+ goto err_map;
}
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map)
- goto err;
+ goto err_map;
kobject_init(&map->kobj, &map_attr_type);
map->mem = mem;
mem->map = map;
ret = kobject_add(&map->kobj, idev->map_dir, "map%d", mi);
if (ret)
- goto err;
+ goto err_map;
ret = kobject_uevent(&map->kobj, KOBJ_ADD);
if (ret)
- goto err;
+ goto err_map;
+ }
+
+ for (pi = 0; pi < MAX_UIO_PORT_REGIONS; pi++) {
+ port = &idev->info->port[pi];
+ if (port->size == 0)
+ break;
+ if (!portio_found) {
+ portio_found = 1;
+ idev->portio_dir = kobject_create_and_add("portio",
+ &idev->dev->kobj);
+ if (!idev->portio_dir)
+ goto err_portio;
+ }
+ portio = kzalloc(sizeof(*portio), GFP_KERNEL);
+ if (!portio)
+ goto err_portio;
+ kobject_init(&portio->kobj, &portio_attr_type);
+ portio->port = port;
+ port->portio = portio;
+ ret = kobject_add(&portio->kobj, idev->portio_dir,
+ "port%d", pi);
+ if (ret)
+ goto err_portio;
+ ret = kobject_uevent(&portio->kobj, KOBJ_ADD);
+ if (ret)
+ goto err_portio;
}
return 0;
-err:
+err_portio:
+ for (pi--; pi >= 0; pi--) {
+ port = &idev->info->port[pi];
+ portio = port->portio;
+ kobject_put(&portio->kobj);
+ }
+ kobject_put(idev->portio_dir);
+err_map:
for (mi--; mi>=0; mi--) {
mem = &idev->info->mem[mi];
map = mem->map;
@@ -228,15 +342,26 @@ err_group:
static void uio_dev_del_attributes(struct uio_device *idev)
{
- int mi;
+ int i;
struct uio_mem *mem;
- for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
- mem = &idev->info->mem[mi];
+ struct uio_port *port;
+
+ for (i = 0; i < MAX_UIO_MAPS; i++) {
+ mem = &idev->info->mem[i];
if (mem->size == 0)
break;
kobject_put(&mem->map->kobj);
}
kobject_put(idev->map_dir);
+
+ for (i = 0; i < MAX_UIO_PORT_REGIONS; i++) {
+ port = &idev->info->port[i];
+ if (port->size == 0)
+ break;
+ kobject_put(&port->portio->kobj);
+ }
+ kobject_put(idev->portio_dir);
+
sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 08:56:10 +0000