diff options
| -rw-r--r-- | Documentation/DocBook/uio-howto.tmpl | 29 | ||||
| -rw-r--r-- | drivers/uio/uio.c | 22 | ||||
| -rw-r--r-- | include/linux/uio_driver.h | 4 |
3 files changed, 51 insertions, 4 deletions
diff --git a/Documentation/DocBook/uio-howto.tmpl b/Documentation/DocBook/uio-howto.tmpl index 52e1b79..8f6e3b2 100644 --- a/Documentation/DocBook/uio-howto.tmpl +++ b/Documentation/DocBook/uio-howto.tmpl @@ -42,6 +42,13 @@ GPL version 2. <revhistory> <revision> + <revnumber>0.8</revnumber> + <date>2008-12-24</date> + <authorinitials>hjk</authorinitials> + <revremark>Added name attributes in mem and portio sysfs directories. + </revremark> + </revision> + <revision> <revnumber>0.7</revnumber> <date>2008-12-23</date> <authorinitials>hjk</authorinitials> @@ -303,12 +310,19 @@ interested in translating it, please email me appear if the size of the mapping is not 0. </para> <para> - Each <filename>mapX/</filename> directory contains two read-only files - that show start address and size of the memory: + Each <filename>mapX/</filename> directory contains four read-only files + that show attributes of the memory: </para> <itemizedlist> <listitem> <para> + <filename>name</filename>: A string identifier for this mapping. This + is optional, the string can be empty. Drivers can set this to make it + easier for userspace to find the correct mapping. + </para> +</listitem> +<listitem> + <para> <filename>addr</filename>: The address of memory that can be mapped. </para> </listitem> @@ -366,12 +380,19 @@ offset = N * getpagesize(); <filename>/sys/class/uio/uioX/portio/</filename>. </para> <para> - Each <filename>portX/</filename> directory contains three read-only - files that show start, size, and type of the port region: + Each <filename>portX/</filename> directory contains four read-only + files that show name, start, size, and type of the port region: </para> <itemizedlist> <listitem> <para> + <filename>name</filename>: A string identifier for this port region. + The string is optional and can be empty. Drivers can set it to make it + easier for userspace to find a certain port region. + </para> +</listitem> +<listitem> + <para> <filename>start</filename>: The first port of this region. </para> </listitem> diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 4ca85a1..68a4965 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -61,6 +61,14 @@ struct uio_map { }; #define to_map(map) container_of(map, struct uio_map, kobj) +static ssize_t map_name_show(struct uio_mem *mem, char *buf) +{ + if (unlikely(!mem->name)) + mem->name = ""; + + return sprintf(buf, "%s\n", mem->name); +} + static ssize_t map_addr_show(struct uio_mem *mem, char *buf) { return sprintf(buf, "0x%lx\n", mem->addr); @@ -82,6 +90,8 @@ struct map_sysfs_entry { ssize_t (*store)(struct uio_mem *, const char *, size_t); }; +static struct map_sysfs_entry name_attribute = + __ATTR(name, S_IRUGO, map_name_show, NULL); static struct map_sysfs_entry addr_attribute = __ATTR(addr, S_IRUGO, map_addr_show, NULL); static struct map_sysfs_entry size_attribute = @@ -90,6 +100,7 @@ static struct map_sysfs_entry offset_attribute = __ATTR(offset, S_IRUGO, map_offset_show, NULL); static struct attribute *attrs[] = { + &name_attribute.attr, &addr_attribute.attr, &size_attribute.attr, &offset_attribute.attr, @@ -133,6 +144,14 @@ struct uio_portio { }; #define to_portio(portio) container_of(portio, struct uio_portio, kobj) +static ssize_t portio_name_show(struct uio_port *port, char *buf) +{ + if (unlikely(!port->name)) + port->name = ""; + + return sprintf(buf, "%s\n", port->name); +} + static ssize_t portio_start_show(struct uio_port *port, char *buf) { return sprintf(buf, "0x%lx\n", port->start); @@ -159,6 +178,8 @@ struct portio_sysfs_entry { ssize_t (*store)(struct uio_port *, const char *, size_t); }; +static struct portio_sysfs_entry portio_name_attribute = + __ATTR(name, S_IRUGO, portio_name_show, NULL); static struct portio_sysfs_entry portio_start_attribute = __ATTR(start, S_IRUGO, portio_start_show, NULL); static struct portio_sysfs_entry portio_size_attribute = @@ -167,6 +188,7 @@ static struct portio_sysfs_entry portio_porttype_attribute = __ATTR(porttype, S_IRUGO, portio_porttype_show, NULL); static struct attribute *portio_attrs[] = { + &portio_name_attribute.attr, &portio_start_attribute.attr, &portio_size_attribute.attr, &portio_porttype_attribute.attr, diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index a0bb6bd..5dcc9ff 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -22,6 +22,7 @@ struct uio_map; /** * struct uio_mem - description of a UIO memory region + * @name: name of the memory region for identification * @addr: address of the device's memory * @size: size of IO * @memtype: type of memory addr points to @@ -29,6 +30,7 @@ struct uio_map; * @map: for use by the UIO core only. */ struct uio_mem { + const char *name; unsigned long addr; unsigned long size; int memtype; @@ -42,12 +44,14 @@ struct uio_portio; /** * struct uio_port - description of a UIO port region + * @name: name of the port region for identification * @start: start of port region * @size: size of port region * @porttype: type of port (see UIO_PORT_* below) * @portio: for use by the UIO core only. */ struct uio_port { + const char *name; unsigned long start; unsigned long size; int porttype; |