linux-toradex.git/Documentation/DocBook/uio-howto.tmpl, branch v3.4.69

uio: documentation fixups

2011-11-15T19:14:01+00:00

The 'name' attribute of struct uio_mem wasn't documented, and the note
about 'kobj' is stale and needs to be changed to 'map'.

Signed-off-by: Geoff Thorpe 
Signed-off-by: "Hans J. Koch" 
Signed-off-by: Greg Kroah-Hartman

uio: Support physical addresses >32 bits on 32-bit systems

2011-10-18T18:18:57+00:00

To support >32-bit physical addresses for UIO_MEM_PHYS type we need to
extend the width of 'addr' in struct uio_mem.  Numerous platforms like
embedded PPC, ARM, and X86 have support for systems with larger physical
address than logical.

Since 'addr' may contain a physical, logical, or virtual address the
easiest solution is to just change the type to 'phys_addr_t' which
should always be greater than or equal to the sizeof(void *) such that
it can properly hold any of the address types.

For physical address we can support up to a 44-bit physical address on a
typical 32-bit system as we utilize remap_pfn_range() for the mapping of
the memory region and pfn's are represnted by shifting the address by
the page size (typically 4k).

Signed-off-by: Kai Jiang 
Signed-off-by: Minghuan Lian 
Signed-off-by: Kumar Gala 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi

Documentation: change email address for Hans Koch

2010-11-18T23:00:46+00:00

My old mail address doesn't exist anymore. This changes all occurrences
to my new address.

Signed-off-by: Hans J. Koch 
Signed-off-by: Randy Dunlap 
Signed-off-by: Linus Torvalds

uio: add generic driver for PCI 2.3 devices

2009-09-15T16:50:48+00:00

This adds a generic uio driver that can bind to any PCI device.  First
user will be virtualization where a qemu userspace process needs to give
guest OS access to the device.

Interrupts are handled using the Interrupt Disable bit in the PCI
command register and Interrupt Status bit in the PCI status register.
All devices compliant to PCI 2.3 (circa 2002) and all compliant PCI
Express devices should support these bits.  Driver detects this support,
and won't bind to devices which do not support the Interrupt Disable Bit
in the command register.

It's expected that more features of interest to virtualization will be
added to this driver in the future. Possibilities are: mmap for device
resources, MSI/MSI-X, eventfd (to interface with kvm), iommu.

Signed-off-by: Michael S. Tsirkin 
Acked-by: Chris Wright 
Signed-off-by: Hans J. Koch 
Acked-by: Jesse Barnes 
Signed-off-by: Greg Kroah-Hartman

UIO: Add name attributes for mappings and port regions

2009-03-24T23:38:24+00:00

If a UIO device has several memory mappings, it can be difficult for userspace
to find the right one. The situation becomes even worse if the UIO driver can
handle different versions of a card that have different numbers of mappings.
Benedikt Spranger has such cards and pointed this out to me. Thanks, Bene!

To address this problem, this patch adds "name" sysfs attributes for each
mapping. Userspace can use these to clearly identify each mapping. The name
string is optional. If a driver doesn't set it, an empty string will be
returned, so this patch won't break existing drivers.

The same problem exists for port region information, so a "name" attribute is
added there, too.

Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: Add missing documentation of features added recently

2009-01-28T23:55:48+00:00

The following features were added to the UIO framework in the near past:

* Generic drivers for platform devices (uio_pdrv, uio_pdrv_genirq)
* an "offset" sysfs attribute for memory mappings

Unfortunately, all this went in without documentation (won't happen again...)

This patch updates UIO documentation.

Signed-off-by: Hans J. Koch 
Acked-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

uio: make uio_info's name and version const

2009-01-06T18:44:44+00:00

These are only ever assigned constant strings and never modified.

This was noticed because Wolfram Sang needed to cast the result of
of_get_property() in order to assign it to the name field of a struct
uio_info.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: Documentation for UIO ioport info handling

2009-01-06T18:44:44+00:00

This patch updates UIO documentation with the changes introduced by
previous UIO patch.

Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

uio-howto.tmpl: use unique output names

2008-07-22T04:54:58+00:00

The Userspace I/O HOWTO template sets two different sections with the same
html output name (about.html).  This clearly won't work, so change the
first one to a unique "aboutthis.html" to prevent clobbering.

Signed-off-by: Mike Frysinger 
Acked-by: Hans J. Koch 
Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman