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| author |   Tomas Winkler <tomas.winkler@intel.com> | 2018-11-22 13:11:40 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-26 16:59:48 +0100 |
| commit | c30362cc326ac5c3d4e6c96aa8f68dbd86955489 (patch) | |
| tree | 5f53064c6b4222e9b1873cf16d955761bb5c5248 /drivers/misc/mei/mei_dev.h | |
| parent | mei: dma ring: implement rx circular buffer logic (diff) | |
| download | linux-dev-c30362cc326ac5c3d4e6c96aa8f68dbd86955489.tar.xz linux-dev-c30362cc326ac5c3d4e6c96aa8f68dbd86955489.zip | |
mei: dma ring: implement transmit flow
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 <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/mei_dev.h')
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index bfd181fbd90c..685b78ce30a5 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -599,6 +599,8 @@ void mei_dmam_ring_free(struct mei_device *dev); bool mei_dma_ring_is_allocated(struct mei_device *dev); void mei_dma_ring_reset(struct mei_device *dev); void mei_dma_ring_read(struct mei_device *dev, unsigned char *buf, u32 len); +void mei_dma_ring_write(struct mei_device *dev, unsigned char *buf, u32 len); +u32 mei_dma_ring_empty_slots(struct mei_device *dev); /* * MEI interrupt functions prototype |