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| author |   Tomas Winkler <tomas.winkler@intel.com> | 2018-11-22 13:11:39 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-26 16:59:48 +0100 |
| commit | 6316321f12ad30cf5af176f26bb39897b320ef46 (patch) | |
| tree | a29d1f9023ba3edc9f2c9313cb5fdf24cb1f44c6 /drivers/misc/mei/mei_dev.h | |
| parent | mei: hw: add dma ring control block (diff) | |
| download | linux-dev-6316321f12ad30cf5af176f26bb39897b320ef46.tar.xz linux-dev-6316321f12ad30cf5af176f26bb39897b320ef46.zip | |
mei: dma ring: implement rx circular buffer logic
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 <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 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 033b5eff8e59..bfd181fbd90c 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -497,7 +497,7 @@ struct mei_device { #endif /* CONFIG_PM */ unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; - u32 rd_msg_hdr; + u32 rd_msg_hdr[MEI_MSG_HDR_MAX]; /* write buffer */ bool hbuf_is_ready; @@ -598,6 +598,7 @@ int mei_dmam_ring_alloc(struct mei_device *dev); 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); /* * MEI interrupt functions prototype |