From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51565) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gMStn-0003fw-7C for qemu-devel@nongnu.org; Tue, 13 Nov 2018 02:14:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gMStk-0002TJ-EE for qemu-devel@nongnu.org; Tue, 13 Nov 2018 02:14:11 -0500 Received: from aserp2120.oracle.com ([141.146.126.78]:59240) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gMStk-0002SU-7A for qemu-devel@nongnu.org; Tue, 13 Nov 2018 02:14:08 -0500 From: Yuval Shaia Date: Tue, 13 Nov 2018 09:12:51 +0200 Message-Id: <20181113071336.6242-3-yuval.shaia@oracle.com> In-Reply-To: <20181113071336.6242-1-yuval.shaia@oracle.com> References: <20181113071336.6242-1-yuval.shaia@oracle.com> Subject: [Qemu-devel] [PATCH v3 02/23] hw/rdma: Add ability to force notification without re-arm List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: yuval.shaia@oracle.com, marcel.apfelbaum@gmail.com, dmitry.fleytman@gmail.com, jasowang@redhat.com, eblake@redhat.com, armbru@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org, shamir.rabinovitch@oracle.com, cohuck@redhat.com Upon completion of incoming packet the device pushes CQE to driver's RX ring and notify the driver (msix). While for data-path incoming packets the driver needs the ability to control whether it wished to receive interrupts or not, for control-path packets such as incoming MAD the driver needs to be notified anyway, it even do not need to re-arm the notification bit. Enhance the notification field to support this. Signed-off-by: Yuval Shaia Reviewed-by: Marcel Apfelbaum --- hw/rdma/rdma_rm.c | 12 ++++++++++-- hw/rdma/rdma_rm_defs.h | 8 +++++++- hw/rdma/vmw/pvrdma_qp_ops.c | 6 ++++-- 3 files changed, 21 insertions(+), 5 deletions(-) diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c index 8d59a42cd1..4f10fcabcc 100644 --- a/hw/rdma/rdma_rm.c +++ b/hw/rdma/rdma_rm.c @@ -263,7 +263,7 @@ int rdma_rm_alloc_cq(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev, } cq->opaque = opaque; - cq->notify = false; + cq->notify = CNT_CLEAR; rc = rdma_backend_create_cq(backend_dev, &cq->backend_cq, cqe); if (rc) { @@ -291,7 +291,10 @@ void rdma_rm_req_notify_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle, return; } - cq->notify = notify; + if (cq->notify != CNT_SET) { + cq->notify = notify ? CNT_ARM : CNT_CLEAR; + } + pr_dbg("notify=%d\n", cq->notify); } @@ -349,6 +352,11 @@ int rdma_rm_alloc_qp(RdmaDeviceResources *dev_res, uint32_t pd_handle, return -EINVAL; } + if (qp_type == IBV_QPT_GSI) { + scq->notify = CNT_SET; + rcq->notify = CNT_SET; + } + qp = res_tbl_alloc(&dev_res->qp_tbl, &rm_qpn); if (!qp) { return -ENOMEM; diff --git a/hw/rdma/rdma_rm_defs.h b/hw/rdma/rdma_rm_defs.h index 7228151239..9b399063d3 100644 --- a/hw/rdma/rdma_rm_defs.h +++ b/hw/rdma/rdma_rm_defs.h @@ -49,10 +49,16 @@ typedef struct RdmaRmPD { uint32_t ctx_handle; } RdmaRmPD; +typedef enum CQNotificationType { + CNT_CLEAR, + CNT_ARM, + CNT_SET, +} CQNotificationType; + typedef struct RdmaRmCQ { RdmaBackendCQ backend_cq; void *opaque; - bool notify; + CQNotificationType notify; } RdmaRmCQ; /* MR (DMA region) */ diff --git a/hw/rdma/vmw/pvrdma_qp_ops.c b/hw/rdma/vmw/pvrdma_qp_ops.c index c668afd0ed..762700a205 100644 --- a/hw/rdma/vmw/pvrdma_qp_ops.c +++ b/hw/rdma/vmw/pvrdma_qp_ops.c @@ -89,8 +89,10 @@ static int pvrdma_post_cqe(PVRDMADev *dev, uint32_t cq_handle, pvrdma_ring_write_inc(&dev->dsr_info.cq); pr_dbg("cq->notify=%d\n", cq->notify); - if (cq->notify) { - cq->notify = false; + if (cq->notify != CNT_CLEAR) { + if (cq->notify == CNT_ARM) { + cq->notify = CNT_CLEAR; + } post_interrupt(dev, INTR_VEC_CMD_COMPLETION_Q); } -- 2.17.2