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| author |   Jan Glauber <jang@linux.vnet.ibm.com> | 2009-03-26 15:24:29 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-26 15:24:21 +0100 |
| commit | e85dea0e415617b5c5627f38c71b33fbc7f94a85 (patch) | |
| tree | 59400d25cb978f66e3b2906dbed01813b617e0ba /drivers/s390/cio/qdio.h | |
| parent | [S390] qdio: move ACK to newest buffer for devices without QEBSM (diff) | |
| download | linux-dev-e85dea0e415617b5c5627f38c71b33fbc7f94a85.tar.xz linux-dev-e85dea0e415617b5c5627f38c71b33fbc7f94a85.zip | |
[S390] qdio: seperate last move index and polling index
The index value that indicated that the input queue moved was also used to
store the index of the first acknowledged buffer. For non-qebsm only the
newest buffer is acknowledged which may be different from the last move index
so two seperate values are needed to track the input queue.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio.h')
| -rw-r--r-- | drivers/s390/cio/qdio.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 42f2b09631b6..57807f5ffe84 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -186,6 +186,9 @@ struct qdio_input_q { /* input buffer acknowledgement flag */ int polling; + /* first ACK'ed buffer */ + int ack_start; + /* how much sbals are acknowledged with qebsm */ int ack_count; @@ -234,7 +237,7 @@ struct qdio_q { int first_to_check; /* first_to_check of the last time */ - int last_move_ftc; + int last_move; /* beginning position for calling the program */ int first_to_kick; |