diff options
| author |   José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
|---|---|---|
| committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
| commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
| tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/Documentation/mic/mic_overview.txt | |
| parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) | |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/Documentation/mic/mic_overview.txt')
| -rw-r--r-- | kernel/Documentation/mic/mic_overview.txt | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/kernel/Documentation/mic/mic_overview.txt b/kernel/Documentation/mic/mic_overview.txt index 77c541802..73f44fc3e 100644 --- a/kernel/Documentation/mic/mic_overview.txt +++ b/kernel/Documentation/mic/mic_overview.txt @@ -24,6 +24,14 @@ a virtual bus called mic bus is created and virtual dma devices are created on it by the host/card drivers. On host the channels are private and used only by the host driver to transfer data for the virtio devices. +The Symmetric Communication Interface (SCIF (pronounced as skiff)) is a +low level communications API across PCIe currently implemented for MIC. +More details are available at scif_overview.txt. + +The Coprocessor State Management (COSM) driver on the host allows for +boot, shutdown and reset of Intel MIC devices. It communicates with a COSM +"client" driver on the MIC cards over SCIF to perform these functions. + Here is a block diagram of the various components described above. The virtio backends are situated on the host rather than the card given better single threaded performance for the host compared to MIC, the ability of @@ -47,19 +55,20 @@ the fact that the virtio block storage backend can only be on the host. | | | Virtio over PCIe IOCTLs | | | +--------------------------+ +-----------+ | | | +-----------+ -| MIC DMA | | | | | MIC DMA | -| Driver | | | | | Driver | -+-----------+ | | | +-----------+ - | | | | | -+---------------+ | | | +----------------+ -|MIC virtual Bus| | | | |MIC virtual Bus | -+---------------+ | | | +----------------+ - | | | | | - | +--------------+ | +---------------+ | - | |Intel MIC | | |Intel MIC | | - +---|Card Driver | | |Host Driver | | - +--------------+ | +---------------+-----+ - | | | +| MIC DMA | | +------+ | +------+ +------+ | | MIC DMA | +| Driver | | | SCIF | | | SCIF | | COSM | | | Driver | ++-----------+ | +------+ | +------+ +--+---+ | +-----------+ + | | | | | | | | ++---------------+ | +------+ | +--+---+ +--+---+ | +----------------+ +|MIC virtual Bus| | |SCIF | | |SCIF | | COSM | | |MIC virtual Bus | ++---------------+ | |HW Bus| | |HW Bus| | Bus | | +----------------+ + | | +------+ | +--+---+ +------+ | | + | | | | | | | | + | +-----------+---+ | | | +---------------+ | + | |Intel MIC | | | | |Intel MIC | | + +---|Card Driver | | | | |Host Driver | | + +------------+--------+ | +----+---------------+-----+ + | | | +-------------------------------------------------------------+ | | | PCIe Bus | |