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Oded Gabbay 1251f23ae8 habanalabs: add event queue and interrupts
This patch adds support for receiving events from Goya's control CPU and
for receiving MSI-X interrupts from Goya's DMA engines and CPU.

Goya's PCI controller supports up to 8 MSI-X interrupts, which only 6 of
them are currently used. The first 5 interrupts are dedicated for Goya's
DMA engine queues. The 6th interrupt is dedicated for Goya's control CPU.

The DMA queue will signal its MSI-X entry upon each completion of a command
buffer that was placed on its primary queue. The driver will then mark that
CB as completed and free the related resources. It will also update the
command submission object which that CB belongs to.

There is a dedicated event queue (EQ) between the driver and Goya's control
CPU. The EQ is located on the Host memory. The control CPU writes a new
entry to the EQ for various reasons, such as ECC error, MMU page fault, Hot
temperature. After writing the new entry to the EQ, the control CPU will
trigger its dedicated MSI-X entry to signal the driver that there is a new
entry in the EQ. The driver will then read the entry and act accordingly.

Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-18 09:46:45 +01:00
arch Merge 5.0-rc6 into char-misc-next 2019-02-11 09:05:58 +01:00
block for-linus-20190209 2019-02-09 10:26:09 -08:00
certs
crypto
Documentation misc: dt-bindings: Add Qualcomm Fastrpc bindings 2019-02-12 10:40:30 +01:00
drivers habanalabs: add event queue and interrupts 2019-02-18 09:46:45 +01:00
firmware
fs for-linus-20190209 2019-02-09 10:26:09 -08:00
include habanalabs: add h/w queues module 2019-02-18 09:46:45 +01:00
init
ipc
kernel Merge 5.0-rc6 into char-misc-next 2019-02-11 09:05:58 +01:00
lib Merge 5.0-rc6 into char-misc-next 2019-02-11 09:05:58 +01:00
LICENSES
mm
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-02-08 11:21:54 -08:00
samples
scripts
security
sound
tools Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-02-10 09:48:18 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge 5.0-rc6 into char-misc-next 2019-02-11 09:05:58 +01:00
Makefile Linux 5.0-rc6 2019-02-10 14:42:20 -08:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.