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authorJan Glauber <jang@linux.vnet.ibm.com>2011-01-05 12:47:50 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-01-05 12:47:28 +0100
commit3d6c76ff32bb9b2ebf6e859855d315eb42e3df50 (patch)
tree3a69d4f3023e75fee0bc55ba38ca7a54a8e4760c /arch/s390/include
parent4f325184f2d4c1f2258873b2a333005dc4dfcbc0 (diff)
downloadlinux-linaro-android-3d6c76ff32bb9b2ebf6e859855d315eb42e3df50.tar.gz
[S390] qdio: outbound tasklet scan threshold
Introduce a scan treshold for the qdio outbound queues. By setting the threshold the driver can tell qdio after how much used SBALs qdio should schedule the outbound tasklet that scans the queue for finished SBALs. The threshold is specific by the drivers because a Hipersockets device is much faster in utilizing outbound buffers than a ZFCP or OSA device. The default values after how many used SBALs the tasklet should run are: OSA: > 31 SBALs Hipersockets: > 7 SBALs zfcp: > 55 SBALs Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/qdio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 46e96bc1f5a..350e7ee5952 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -361,6 +361,7 @@ struct qdio_initialize {
qdio_handler_t *input_handler;
qdio_handler_t *output_handler;
void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
+ int scan_threshold;
unsigned long int_parm;
void **input_sbal_addr_array;
void **output_sbal_addr_array;