diff options
| author | Sudeep Dutt <sudeep.dutt@intel.com> | 2015-04-29 05:32:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 12:13:36 -0700 |
| commit | 7df20f2d893db42eaa1ea1e30a2573c971ec9238 (patch) | |
| tree | 372f796f0c48006754facac07edda9ea390b88c7 /Documentation/mic/mic_overview.txt | |
| parent | 0d09f1a54d9710548c9af72dc1564c8291a5307c (diff) | |
misc: mic: SCIF header file and IOCTL interface
This patch introduces the SCIF documentation in the header file
and describes the IOCTL interface for user mode. mic_overview.txt
is updated with documentation on SCIF and a new document
describing SCIF in more details is available in scif_overview.txt.
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/mic/mic_overview.txt')
| -rw-r--r-- | Documentation/mic/mic_overview.txt | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/Documentation/mic/mic_overview.txt b/Documentation/mic/mic_overview.txt index 77c541802ad9..1a2f2c8ec59e 100644 --- a/Documentation/mic/mic_overview.txt +++ b/Documentation/mic/mic_overview.txt @@ -24,6 +24,10 @@ 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. + 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 @@ -47,18 +51,18 @@ 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 | | | Driver | ++-----------+ | +----------+ | +-----------+ | +-----------+ + | | | | | | | ++---------------+ | +-----+-----+ | +-----+-----+ | +---------------+ +|MIC virtual Bus| | |SCIF HW Bus| | |SCIF HW BUS| | |MIC virtual Bus| ++---------------+ | +-----------+ | +-----+-----+ | +---------------+ + | | | | | | | + | +--------------+ | | | +---------------+ | + | |Intel MIC | | | | |Intel MIC | | + +---|Card Driver +----+ | | |Host Driver | | + +--------------+ | +----+---------------+-----+ | | | +-------------------------------------------------------------+ | | |