linux/drivers/misc/mic, branch v4.3

misc: mic: scif bug fix for vmalloc_to_page crash

2015-07-23T04:25:36Z

v4.2-rc1 enabled huge page support for ioremap(..). Calling vmalloc_to_page after v4.2-rc1 results in the crash shown below on the host upon booting X100 coprocessors: BUG: unable to handle kernel paging request at ffffc47c00000000 IP: [] vmalloc_to_page+0x6c/0xb0 This patch fixes this crash by obtaining the fake struct page pointer which is required to be passed into dma_map_sg(..) by calling pfn_to_page(..) instead of vmalloc_to_page(..). Link: https://lkml.org/lkml/2015/7/18/110 Reviewed-by: Nikhil Rao Suggested-by: Toshi Kani Signed-off-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: Fix reported static checker warning

2015-06-13T00:01:43Z

Delete unnecessary prints resulting in an "spdev could be null" warning from a static checker in scif_peer_remove(..). Reported-by: Dan Carpenter Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: Fix randconfig build error by including errno.h

2015-06-13T00:01:43Z

This issue was reported @ https://lkml.org/lkml/2015/6/9/731 Reported-by: Jim Davis Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: MIC card driver specific changes to enable SCIF

2015-05-24T19:13:37Z

MIC card driver specific changes to enable SCIF. This patch implements the SCIF hardware bus operations and registers a SCIF device on the SCIF hardware bus. Reviewed-by: Nikhil Rao Signed-off-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: MIC host driver specific changes to enable SCIF

2015-05-24T19:13:37Z

MIC host driver specific changes to enable SCIF. This patch implements the SCIF hardware bus operations and registers a SCIF device on the SCIF hardware bus. Reviewed-by: Nikhil Rao Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: SCIF messaging and node enumeration APIs

2015-05-24T19:13:37Z

SCIF messaging APIs which allow sending messages between the SCIF endpoints via a byte stream based ring buffer which has been optimized to avoid reads across PCIe. The SCIF messaging APIs are typically used for short < 1024 byte messages for best performance while the RDMA APIs which will be submitted in a future patch series is recommended for larger transfers. The node enumeration API enables a user to query for the number of nodes online in the SCIF network and their node ids. Reviewed-by: Ashutosh Dixit Signed-off-by: Nikhil Rao Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: SCIF connections APIs i.e. accept and connect

2015-05-24T19:13:36Z

SCIF connection APIs which establish a SCIF connection between a pair of SCIF endpoints. A SCIF connection consists of a dedicated queue-pair between the endpoints. Client messages are sent over the queue-pair whereas the signaling associated with the message is multiplexed over the node queue-pair. Similarly other control messages such as exposing registered memory are also sent over the node queue-pair. The SCIF endpoints must be in connected state to exchange messages, register memory, map remote memory and trigger DMA transfers. SCIF connections can be set up asynchronously or synchronously. Thanks to Johnnie S Peters for authoring parts of this patch during early bring up of the SCIF driver. Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Nikhil Rao Signed-off-by: Greg Kroah-Hartman

misc: mic: SCIF open close bind and listen APIs

2015-05-24T19:13:36Z

SCIF character device file operations and kernel APIs for opening and closing a user and kernel mode SCIF endpoint. This patch also enables binding to a SCIF port and listening for incoming SCIF connections. Reviewed-by: Nikhil Rao Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: SCIF node queue pair setup management

2015-05-24T19:13:36Z

SCIF node queue pair setup creates the SCIF driver kernel mode private node queue pairs between all the nodes to enable internal control message communication once SCIF gets probed by the SCIF hardware bus. Peer to peer communication between MIC Coprocessor nodes is supported. Reviewed-by: Nikhil Rao Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman

misc: mic: SCIF module initialization

2015-05-24T19:13:36Z

SCIF module initialization, DMA mapping, ioremap wrapper APIs and debugfs hooks. SCIF gets probed by the SCIF hardware bus if SCIF devices were registered by base drivers. A MISC device is registered to provide the SCIF character device interface. Reviewed-by: Nikhil Rao Reviewed-by: Ashutosh Dixit Signed-off-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman