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mei: add support for variable length mei headers.

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Remove header size knowledge from me and txe hw layers,
this requires to change the write handler to accept
header and its length as well as data and its length.

HBM messages are fixed to use basic header, hence we add mei_hbm2slots()
that converts HBM message length and mei message header,
while mei_data2slots() converts data length directly to the slots.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2018-07-31 09:35:33 +03:00
committed by Greg Kroah-Hartman
parent b34e9a15b3
commit 98e70866aa
6 changed files with 103 additions and 65 deletions
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4
drivers/misc/mei/interrupt.c
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@@ -173,7 +173,7 @@ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb,
int slots;
int ret;
msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_response));
msg_slots = mei_hbm2slots(sizeof(struct hbm_client_connect_response));
slots = mei_hbuf_empty_slots(dev);
if (slots < 0)
return -EOVERFLOW;
@@ -208,7 +208,7 @@ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb,
if (!list_empty(&cl->rd_pending))
return 0;
msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
msg_slots = mei_hbm2slots(sizeof(struct hbm_flow_control));
slots = mei_hbuf_empty_slots(dev);
if (slots < 0)
return -EOVERFLOW;