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mei: dma ring: implement rx circular buffer logic

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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>
This commit is contained in:
Tomas Winkler
2018-11-22 13:11:39 +02:00
committed by Greg Kroah-Hartman
parent 2513eb0dd7
commit 6316321f12
6 changed files with 98 additions and 15 deletions
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2
drivers/misc/mei/init.c
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@@ -151,7 +151,7 @@ int mei_reset(struct mei_device *dev)
mei_hbm_reset(dev);
dev->rd_msg_hdr = 0;
memset(dev->rd_msg_hdr, 0, sizeof(dev->rd_msg_hdr));
if (ret) {
dev_err(dev->dev, "hw_reset failed ret = %d\n", ret);