summaryrefslogtreecommitdiff
path: root/Documentation/ABI/stable/firewire-cdev
diff options
context:
space:
mode:
authorMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-10-30 08:40:50 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-10-30 13:14:29 +0100
commit54a19b4d3fe0fa0a31b46cd60951e8177cac25fa (patch)
treeb84ba6fc592daf836a6f42c6a1ba5eda91d73c73 /Documentation/ABI/stable/firewire-cdev
parented8c39d43983d19f181ff47af0374c4e252f84bd (diff)
downloadlwn-54a19b4d3fe0fa0a31b46cd60951e8177cac25fa.tar.gz
lwn-54a19b4d3fe0fa0a31b46cd60951e8177cac25fa.zip
docs: ABI: cleanup several ABI documents
There are some ABI documents that, while they don't generate any warnings, they have issues when parsed by get_abi.pl script on its output result. Address them, in order to provide a clean output. Reviewed-by: Tom Rix <trix@redhat.com> # for fpga-manager Reviewed-By: Kajol Jain<kjain@linux.ibm.com> # for sysfs-bus-event_source-devices-hv_gpci and sysfs-bus-event_source-devices-hv_24x7 Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for IIO Acked-by: Oded Gabbay <oded.gabbay@gmail.com> # for Habanalabs Acked-by: Vaibhav Jain <vaibhav@linux.ibm.com> # for sysfs-bus-papr-pmem Acked-by: Cezary Rojewski <cezary.rojewski@intel.com> # for catpt Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Acked-by: Ilya Dryomov <idryomov@gmail.com> # for rbd Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/5bc78e5b68ed1e9e39135173857cb2e753be868f.1604042072.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/stable/firewire-cdev')
-rw-r--r--Documentation/ABI/stable/firewire-cdev65
1 files changed, 34 insertions, 31 deletions
diff --git a/Documentation/ABI/stable/firewire-cdev b/Documentation/ABI/stable/firewire-cdev
index c9e8ff026154..261f85b13154 100644
--- a/Documentation/ABI/stable/firewire-cdev
+++ b/Documentation/ABI/stable/firewire-cdev
@@ -16,6 +16,7 @@ Description:
different scope:
- The 1394 node which is associated with the file:
+
- Asynchronous request transmission
- Get the Configuration ROM
- Query node ID
@@ -23,6 +24,7 @@ Description:
and local node
- The 1394 bus (i.e. "card") to which the node is attached to:
+
- Isochronous stream transmission and reception
- Asynchronous stream transmission and reception
- Asynchronous broadcast request transmission
@@ -35,6 +37,7 @@ Description:
- Bus reset initiation, bus reset event reception
- All 1394 buses:
+
- Allocation of IEEE 1212 address ranges on the local
link layers, reception of inbound requests to such
an address range, asynchronous response transmission
@@ -59,50 +62,50 @@ Description:
The following file operations are supported:
open(2)
- Currently the only useful flags are O_RDWR.
+ Currently the only useful flags are O_RDWR.
ioctl(2)
- Initiate various actions. Some take immediate effect, others
- are performed asynchronously while or after the ioctl returns.
- See the inline documentation in <linux/firewire-cdev.h> for
- descriptions of all ioctls.
+ Initiate various actions. Some take immediate effect, others
+ are performed asynchronously while or after the ioctl returns.
+ See the inline documentation in <linux/firewire-cdev.h> for
+ descriptions of all ioctls.
poll(2), select(2), epoll_wait(2) etc.
- Watch for events to become available to be read.
+ Watch for events to become available to be read.
read(2)
- Receive various events. There are solicited events like
- outbound asynchronous transaction completion or isochronous
- buffer completion, and unsolicited events such as bus resets,
- request reception, or PHY packet reception. Always use a read
- buffer which is large enough to receive the largest event that
- could ever arrive. See <linux/firewire-cdev.h> for descriptions
- of all event types and for which ioctls affect reception of
- events.
+ Receive various events. There are solicited events like
+ outbound asynchronous transaction completion or isochronous
+ buffer completion, and unsolicited events such as bus resets,
+ request reception, or PHY packet reception. Always use a read
+ buffer which is large enough to receive the largest event that
+ could ever arrive. See <linux/firewire-cdev.h> for descriptions
+ of all event types and for which ioctls affect reception of
+ events.
mmap(2)
- Allocate a DMA buffer for isochronous reception or transmission
- and map it into the process address space. The arguments should
- be used as follows: addr = NULL, length = the desired buffer
- size, i.e. number of packets times size of largest packet,
- prot = at least PROT_READ for reception and at least PROT_WRITE
- for transmission, flags = MAP_SHARED, fd = the handle to the
- /dev/fw*, offset = 0.
+ Allocate a DMA buffer for isochronous reception or transmission
+ and map it into the process address space. The arguments should
+ be used as follows: addr = NULL, length = the desired buffer
+ size, i.e. number of packets times size of largest packet,
+ prot = at least PROT_READ for reception and at least PROT_WRITE
+ for transmission, flags = MAP_SHARED, fd = the handle to the
+ /dev/fw*, offset = 0.
Isochronous reception works in packet-per-buffer fashion except
for multichannel reception which works in buffer-fill mode.
munmap(2)
- Unmap the isochronous I/O buffer from the process address space.
+ Unmap the isochronous I/O buffer from the process address space.
close(2)
- Besides stopping and freeing I/O contexts that were associated
- with the file descriptor, back out any changes to the local
- nodes' Configuration ROM. Deallocate isochronous channels and
- bandwidth at the IRM that were marked for kernel-assisted
- re- and deallocation.
-
-Users: libraw1394
- libdc1394
- libhinawa
+ Besides stopping and freeing I/O contexts that were associated
+ with the file descriptor, back out any changes to the local
+ nodes' Configuration ROM. Deallocate isochronous channels and
+ bandwidth at the IRM that were marked for kernel-assisted
+ re- and deallocation.
+
+Users: libraw1394;
+ libdc1394;
+ libhinawa;
tools like linux-firewire-utils, fwhack, ...