sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-27 18:12:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

[arbel] Randomise the high-order bits of queue pair numbers

Browse Source 
This is a backport of commit 0b1222f ("[hermon] Randomise the
high-order bits of queue pair numbers") to the Arbel driver.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-07-17 09:41:32 +01:00
parent 40d7c70438
commit 4cb157a3b7
2 changed files with 10 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/drivers/infiniband/arbel.h
View File

@@ -360,8 +360,8 @@ struct arbel_recv_work_queue {
*/
#define ARBEL_MAX_QPS 8
/** Base queue pair number */
#define ARBEL_QPN_BASE 0x550000
/** Queue pair number randomisation mask */
#define ARBEL_QPN_RANDOM_MASK 0xfff000
/** An Arbel queue pair */
struct arbel_queue_pair {
@@ -564,7 +564,9 @@ arbel_cq_arm_doorbell_idx ( struct arbel *arbel,
*/
static inline unsigned int
arbel_send_doorbell_idx ( struct arbel *arbel, struct ib_queue_pair *qp ) {
return ( ARBEL_MAX_CQS + ( qp->qpn - arbel->special_qpn_base ) );
return ( ARBEL_MAX_CQS +
( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) -
arbel->special_qpn_base ) );
}
/**
@@ -577,7 +579,8 @@ arbel_send_doorbell_idx ( struct arbel *arbel, struct ib_queue_pair *qp ) {
static inline unsigned int
arbel_recv_doorbell_idx ( struct arbel *arbel, struct ib_queue_pair *qp ) {
return ( ARBEL_MAX_DOORBELL_RECORDS - ARBEL_MAX_CQS -
( qp->qpn - arbel->special_qpn_base ) - 1 );
( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) -
arbel->special_qpn_base ) - 1 );
}
/**