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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /Documentation/mic/mic_overview.txt
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'Documentation/mic/mic_overview.txt')
-rw-r--r--Documentation/mic/mic_overview.txt31
1 files changed, 18 insertions, 13 deletions
diff --git a/Documentation/mic/mic_overview.txt b/Documentation/mic/mic_overview.txt
index 1a2f2c8ec..73f44fc3e 100644
--- a/Documentation/mic/mic_overview.txt
+++ b/Documentation/mic/mic_overview.txt
@@ -28,6 +28,10 @@ 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
@@ -51,19 +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 | | | SCIF | | | SCIF | | | Driver |
-+-----------+ | +----------+ | +-----------+ | +-----------+
- | | | | | | |
-+---------------+ | +-----+-----+ | +-----+-----+ | +---------------+
-|MIC virtual Bus| | |SCIF HW Bus| | |SCIF HW 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 |