From patchwork Tue Nov 14 17:02:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiraz Saleem X-Patchwork-Id: 13455718 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5F1DC4167D for ; Tue, 14 Nov 2023 17:04:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233456AbjKNRET (ORCPT ); Tue, 14 Nov 2023 12:04:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233442AbjKNRES (ORCPT ); Tue, 14 Nov 2023 12:04:18 -0500 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B21DCB8 for ; Tue, 14 Nov 2023 09:04:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699981454; x=1731517454; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zxOmDSB1bXtZ53v8/lq3lTjX4uGLeopnE556jUM0y2s=; b=EVYqeeR5rXmLSW/3l4/ze1NBoW1gkwngnU6cr00ctd+J+d63cc9XhOed UoxC05ym2g7i0tLa+J/J62EcEnh7nrj0guLDXPGUWKKm7q5RzEm3KQSUy stSvK6ALj7HIF+JtD91ThS97QAB/UxBezZ1O5ouG8LGUltibOCwnWBWdq YPc9DXMpyumzbDZBi/L8cJm3W7I2+i+09bPVEcX/8Ko/Ywxf7ob9DpdBB TbHs+pwvCJopIWGc79EfvCFwhPQsjMgF04R6ZaUVrhcvcqI9xtHhFAUyZ QDgHpM43HBL/OeCmjJqikeGB2vwIWXw1YuXV5WvAyOrhgO4qG4m6EVraK w==; X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="394614918" X-IronPort-AV: E=Sophos;i="6.03,302,1694761200"; d="scan'208";a="394614918" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 09:03:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="908450235" X-IronPort-AV: E=Sophos;i="6.03,302,1694761200"; d="scan'208";a="908450235" Received: from ssaleem-mobl1.amr.corp.intel.com ([10.93.66.179]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 09:03:16 -0800 From: Shiraz Saleem To: jgg@nvidia.com, leon@kernel.org, linux-rdma@vger.kernel.org Cc: Mustafa Ismail , Shiraz Saleem Subject: [PATCH for-rc 2/2] RDMA/irdma: Add wait for suspend on SQD Date: Tue, 14 Nov 2023 11:02:46 -0600 Message-Id: <20231114170246.238-3-shiraz.saleem@intel.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20231114170246.238-1-shiraz.saleem@intel.com> References: <20231114170246.238-1-shiraz.saleem@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Mustafa Ismail Currently, there is no wait for the QP suspend to complete on a modify to SQD state. Add a wait, after the modify to SQD state, for the Suspend Complete AE. While we are at it, update the suspend timeout value in irdma_prep_tc_change to use IRDMA_EVENT_TIMEOUT_MS too. Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs") Signed-off-by: Mustafa Ismail Signed-off-by: Shiraz Saleem --- drivers/infiniband/hw/irdma/hw.c | 6 +++++- drivers/infiniband/hw/irdma/main.c | 2 +- drivers/infiniband/hw/irdma/main.h | 2 +- drivers/infiniband/hw/irdma/verbs.c | 21 +++++++++++++++++++++ drivers/infiniband/hw/irdma/verbs.h | 1 + 5 files changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c index 8fa7e4a18e73..74f6bc7b7ad1 100644 --- a/drivers/infiniband/hw/irdma/hw.c +++ b/drivers/infiniband/hw/irdma/hw.c @@ -321,7 +321,11 @@ static void irdma_process_aeq(struct irdma_pci_f *rf) break; case IRDMA_AE_QP_SUSPEND_COMPLETE: if (iwqp->iwdev->vsi.tc_change_pending) { - atomic_dec(&iwqp->sc_qp.vsi->qp_suspend_reqs); + if (!atomic_dec_return(&qp->vsi->qp_suspend_reqs)) + wake_up(&iwqp->iwdev->suspend_wq); + } + if (iwqp->suspend_pending) { + iwqp->suspend_pending = false; wake_up(&iwqp->iwdev->suspend_wq); } break; diff --git a/drivers/infiniband/hw/irdma/main.c b/drivers/infiniband/hw/irdma/main.c index 9ac48b4dab41..3f13200ff71b 100644 --- a/drivers/infiniband/hw/irdma/main.c +++ b/drivers/infiniband/hw/irdma/main.c @@ -48,7 +48,7 @@ static void irdma_prep_tc_change(struct irdma_device *iwdev) /* Wait for all qp's to suspend */ wait_event_timeout(iwdev->suspend_wq, !atomic_read(&iwdev->vsi.qp_suspend_reqs), - IRDMA_EVENT_TIMEOUT); + msecs_to_jiffies(IRDMA_EVENT_TIMEOUT_MS)); irdma_ws_reset(&iwdev->vsi); } diff --git a/drivers/infiniband/hw/irdma/main.h b/drivers/infiniband/hw/irdma/main.h index d66d87bb8bc4..b65bc2ea542f 100644 --- a/drivers/infiniband/hw/irdma/main.h +++ b/drivers/infiniband/hw/irdma/main.h @@ -78,7 +78,7 @@ #define MAX_DPC_ITERATIONS 128 -#define IRDMA_EVENT_TIMEOUT 50000 +#define IRDMA_EVENT_TIMEOUT_MS 5000 #define IRDMA_VCHNL_EVENT_TIMEOUT 100000 #define IRDMA_RST_TIMEOUT_HZ 4 diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c index 77a4a12a6493..cb828e3da478 100644 --- a/drivers/infiniband/hw/irdma/verbs.c +++ b/drivers/infiniband/hw/irdma/verbs.c @@ -1159,6 +1159,21 @@ static u8 irdma_roce_get_vlan_prio(const struct ib_gid_attr *attr, u8 prio) return prio; } +static int irdma_wait_for_suspend(struct irdma_qp *iwqp) +{ + if (!wait_event_timeout(iwqp->iwdev->suspend_wq, + !iwqp->suspend_pending, + msecs_to_jiffies(IRDMA_EVENT_TIMEOUT_MS))) { + iwqp->suspend_pending = false; + ibdev_warn(&iwqp->iwdev->ibdev, + "modify_qp timed out waiting for suspend. qp_id = %d, last_ae = 0x%x\n", + iwqp->ibqp.qp_num, iwqp->last_aeq); + return -EBUSY; + } + + return 0; +} + /** * irdma_modify_qp_roce - modify qp request * @ibqp: qp's pointer for modify @@ -1422,6 +1437,7 @@ int irdma_modify_qp_roce(struct ib_qp *ibqp, struct ib_qp_attr *attr, info.next_iwarp_state = IRDMA_QP_STATE_SQD; issue_modify_qp = 1; + iwqp->suspend_pending = true; break; case IB_QPS_SQE: case IB_QPS_ERR: @@ -1462,6 +1478,11 @@ int irdma_modify_qp_roce(struct ib_qp *ibqp, struct ib_qp_attr *attr, ctx_info->rem_endpoint_idx = udp_info->arp_idx; if (irdma_hw_modify_qp(iwdev, iwqp, &info, true)) return -EINVAL; + if (info.next_iwarp_state == IRDMA_QP_STATE_SQD) { + ret = irdma_wait_for_suspend(iwqp); + if (ret) + return ret; + } spin_lock_irqsave(&iwqp->lock, flags); if (iwqp->iwarp_state == info.curr_iwarp_state) { iwqp->iwarp_state = info.next_iwarp_state; diff --git a/drivers/infiniband/hw/irdma/verbs.h b/drivers/infiniband/hw/irdma/verbs.h index c42ac22de00e..cfa140b36395 100644 --- a/drivers/infiniband/hw/irdma/verbs.h +++ b/drivers/infiniband/hw/irdma/verbs.h @@ -198,6 +198,7 @@ struct irdma_qp { u8 flush_issued : 1; u8 sig_all : 1; u8 pau_mode : 1; + u8 suspend_pending : 1; u8 rsvd : 1; u8 iwarp_state; u16 term_sq_flush_code;