encode SL in sched_queue field to improve hardware QoS guarantees
for connected QPs.
Signed-off-by: Michael S. Tsirkin <[EMAIL PROTECTED]>
---
Index: linux-2.6/drivers/infiniband/hw/mthca/mthca_qp.c
===================================================================
--- linux-2.6.orig/drivers/infiniband/hw/mthca/mthca_qp.c
+++ linux-2.6/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -49,6 +49,10 @@
#include "mthca_memfree.h"
#include "mthca_wqe.h"
+static int mthca_qos_support = 0;
+module_param_named(qos_support, mthca_qos_support, int, 0644);
+MODULE_PARM_DESC(qos_support, "Enable QoS support if > 0");
+
enum {
MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
MTHCA_ACK_REQ_FREQ = 10,
@@ -694,6 +698,19 @@ int mthca_modify_qp(struct ib_qp *ibqp,
goto out_mailbox;
qp_param->opt_param_mask |=
cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
+ if (mthca_qos_support) {
+ u8 sl = attr->ah_attr.sl;
+ u8 sched_queue = (sl & 0x8) | (sl & (~(sl >> 1)) & 0x4)
|
+ ((sl >> 1) & (sl >> 2) & 0x2) | ((sl >> 1) &
0x1);
+
+ if (mthca_is_memfree(dev)) {
+ qp_context->rlkey_arbel_sched_queue |=
sched_queue;
+ } else {
+ qp_context->tavor_sched_queue |= sched_queue;
+ }
+ qp_param->opt_param_mask |=
+ cpu_to_be32(MTHCA_QP_OPTPAR_SCHED_QUEUE);
+ }
}
if (attr_mask & IB_QP_TIMEOUT) {
--
MST
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