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22 Commits

Author SHA1 Message Date
Alexander Gordeev
08261d87f7 PCI/MSI: Enable multiple MSIs with pci_enable_msi_block_auto() 
The new function pci_enable_msi_block_auto() tries to allocate
maximum possible number of MSIs up to the number the device
supports. It generalizes a pattern when pci_enable_msi_block()
is contiguously called until it succeeds or fails.

Opposite to pci_enable_msi_block() which takes the number of
MSIs to allocate as a input parameter,
pci_enable_msi_block_auto() could be used by device drivers to
obtain the number of assigned MSIs and the number of MSIs the
device supports.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/c3de2419df94a0f95ca1a6f755afc421486455e6.1353324359.git.agordeev@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-01-24 17:25:13 +01:00
Michael Witten
798c794df8 Docs: MSI-HOWTO: MSI -> MSIs 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:41 +00:00
Michael Witten
c2b65e181a Docs: MSI-HOWTO: Insert a comma 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:40 +00:00
Michael Witten
1b8386f612 Docs: MSI-HOWTO: can -> could 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:39 +00:00
Michael Witten
e6b85a1f8a Docs: MSI-HOWTO: Use unknown ...' rather than ... know about.' 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:39 +00:00
Michael Witten
952df55b5a Docs: MSI-HOWTO: may -> might 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:37 +00:00
Michael Witten
e14bd7e614 Docs: MSI-HOWTO: Insert a comma 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:37 +00:00
Michael Witten
e6ffceb0de Docs: MSI-HOWTO: API -> function 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:36 +00:00
Michael Witten
5a84fc3162 Docs: MSI-HOWTO: , -> ; 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:36 +00:00
Michael Witten
6457d9b350 Docs: MSI-HOWTO: Move a sentence to another paragraph 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:35 +00:00
Michael Witten
ed737c1882 Docs: MSI-HOWTO: Insert `that' 
... as per Randy Dunlap's wishes :-P
Message-Id: <20110717114023.2b4cce91.rdunlap@xenotime.net>

Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:34 +00:00
Michael Witten
e4439236ef Docs: MSI-HOWTO: Offset modifier with a comma, and insert `yet' for emphasis 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:33 +00:00
Michael Witten
263d8d57b3 Docs: MSI-HOWTO: Put the `because' subordinate clause first 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:32 +00:00
Michael Witten
1d15afcc73 Docs: MSI-HOWTO: Streamline some wording 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:32 +00:00
Michael Witten
a2d4d50128 Docs: MSI-HOWTO: asked for' -> requested' 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:31 +00:00
Michael Witten
4979de6efb Docs: MSI-HOWTO: Use present tense and streamline some wording 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:31 +00:00
Michael Witten
891f692533 Docs: MSI-HOWTO: Use the subjunctive, and change can' to may' 
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Acked-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
 2011-08-02 21:34:30 +00:00
Lucas De Marchi
25985edced Fix common misspellings 
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
 2011-03-31 11:26:23 -03:00
Michael Ellerman
fafad5bf06 PCI MSI: Add example request loop to MSI-HOWTO.txt 
Encourage driver writers to think about supporting a variable number
of MSI-X interrupts, and give an example of how to do such a
request.

Acked-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
 2009-03-20 11:35:04 -07:00
Matthew Wilcox
1c8d7b0a56 PCI MSI: Add support for multiple MSI 
Add the new API pci_enable_msi_block() to allow drivers to
request multiple MSI and reimplement pci_enable_msi in terms of
pci_enable_msi_block.  Ensure that the architecture back ends don't
have to know about multiple MSI.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
 2009-03-20 10:48:14 -07:00
Matthew Wilcox
c41ade2ee1 Rewrite MSI-HOWTO 
I didn't find the previous version very useful, so I rewrote it.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Reviewed-by: Grant Grundler <grundler@parisc-linunx.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
 2009-03-20 10:48:11 -07:00
Randy Dunlap
31c00fc15e Create/use more directory structure in the Documentation/ tree. 
Create Documentation/blockdev/ sub-directory and populate it.
Populate the Documentation/serial/ sub-directory.
Move MSI-HOWTO.txt to Documentation/PCI/.
Move ioctl-number.txt to Documentation/ioctl/.
Update all relevant 00-INDEX files.
Update all relevant Kconfig files and source files.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
 2008-11-14 17:28:53 +00:00