misc: mic: Update MIC host daemon with COSM changes
This patch updates the MIC host daemon to work with corresponding
changes in COSM. Other MIC daemon fixes, cleanups and enhancements as
are also rolled into this patch. Changes to MIC sysfs ABI which go
into effect with this patch are also documented.
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/Documentation/mic/mic_overview.txt b/Documentation/mic/mic_overview.txt
index 1a2f2c8..73f44fc 100644
--- a/Documentation/mic/mic_overview.txt
+++ b/Documentation/mic/mic_overview.txt
@@ -28,6 +28,10 @@
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 @@
| | | 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 |