On Mon, 2007-01-22 at 09:50, Michael S. Tsirkin wrote:
> encode SL in sched_queue field to improve hardware QoS guarantees
> for connected QPs.
Is UD already handled properly in terms of mthca ?
-- Hal
> 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) {
>
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