linux.git/drivers/misc/mei, branch v5.0-rc2

mei: me: mark CNP devices as having dma support

2018-11-26T15:59:48+00:00

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: bump hbm version to 2.1

2018-11-26T15:59:48+00:00

Bump HBM version to 2.1 to indicate DMA transfer support.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: dma ring: implement transmit flow

2018-11-26T15:59:48+00:00

Implement a circular buffer on allocated system memory. Read and write
indices are stored on the control block which is also shared between the
device and the host.
Two new functions are exported from the DMA module: mei_dma_ring_write,
and mei_dma_ring_empty_slots. The former simply copy a packet on the TX
DMA circular buffer and later, returns the number of empty slots on the
TX DMA circular buffer.

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: dma ring: implement rx circular buffer logic

2018-11-26T15:59:48+00:00

Implement circular buffer protocol over receive dma
buffer. Add extension to the mei message header that holds
length of the buffer on the dma buffer.

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: hw: add dma ring control block

2018-11-26T15:59:48+00:00

The DMA ring control block contains write and read
indices for host and device circular buffers.

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: hbm: setup dma ring

2018-11-26T15:59:48+00:00

DMA ring is allocated upon HBM handshake and the ring parameters are set
via dedicated HBM_DMA_SETUP request command. The firmware will perform
its setup and respond with a status. On failure the DMA buffers are
released.

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: dma ring buffers allocation

2018-11-26T15:59:48+00:00

Allocate DMA ring buffers from managed coherent memory.

Signed-off-by: Tomas Winkler 
Signed-off-by: Alexander Usyskin 
Signed-off-by: Greg Kroah-Hartman

mei: expedite ioctl return on the notify set operation error

2018-11-07T12:53:03+00:00

The notify set operation ioctl will wait till timeout is expired
even in case when the FW returned an error.
Check the status field of the client object in wait_event_timeout()
to determine if the caller can return earlier.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: flush queues by the host client only

2018-11-07T12:53:03+00:00

During queues flush, the me client in most cases is already
unlinked hence the me client id is unavailable. The host client
structure pointer is enough for identification.
The function mei_cl_cmp_id() is dropped as it has no more usage.

Signed-off-by: Alexander Usyskin 
Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman

mei: hbm: drop BUG() from the hbm handler

2018-11-07T12:53:03+00:00

Drop BUG() from the hbm handler in order not to crash the whole
kernel on faulty firmware implementation. Instead of it, just return
an error resulting into link reset.
There is no any known issue of faulty firmware in this matter,
the change is just to ease the development.

Signed-off-by: Tomas Winkler 
Signed-off-by: Greg Kroah-Hartman