From patchwork Tue Mar 12 18:07:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Brandes, Shai" X-Patchwork-Id: 138268 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id B166743C94; Tue, 12 Mar 2024 19:09:26 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 8765742E60; Tue, 12 Mar 2024 19:08:12 +0100 (CET) Received: from smtp-fw-80009.amazon.com (smtp-fw-80009.amazon.com [99.78.197.220]) by mails.dpdk.org (Postfix) with ESMTP id 3E7DE42E55 for ; Tue, 12 Mar 2024 19:08:09 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1710266889; x=1741802889; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=5lqm0uK168GIHiXVYS2vKUpV4U51aCKvk93/x4mA6SY=; b=a30N7H4cGZy/QfDacJ6MmOqpRogy/cVre1iy4CV5tlB9akou5iV+iiAc Da7We66osjdLYxg+Xee/NxWGFnAmy+Gmp5F++/l/t0y1DnkR1IUkhdDQv lOclAgUE8sjGqg2jMwkOm5mB/awT37+yArF2JvXrf5y54+YSbt9YxeIHO k=; X-IronPort-AV: E=Sophos;i="6.07,119,1708387200"; d="scan'208";a="72672078" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-80009.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2024 18:08:06 +0000 Received: from EX19MTAEUA001.ant.amazon.com [10.0.17.79:6038] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.26.159:2525] with esmtp (Farcaster) id 49492acd-b1b2-4fdc-8ef6-80b3ec2ce72e; Tue, 12 Mar 2024 18:08:05 +0000 (UTC) X-Farcaster-Flow-ID: 49492acd-b1b2-4fdc-8ef6-80b3ec2ce72e Received: from EX19D007EUA001.ant.amazon.com (10.252.50.133) by EX19MTAEUA001.ant.amazon.com (10.252.50.192) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Tue, 12 Mar 2024 18:08:04 +0000 Received: from EX19MTAUWA001.ant.amazon.com (10.250.64.204) by EX19D007EUA001.ant.amazon.com (10.252.50.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Tue, 12 Mar 2024 18:08:03 +0000 Received: from HFA15-CG15235BS.amazon.com (10.85.143.174) by mail-relay.amazon.com (10.250.64.204) with Microsoft SMTP Server id 15.2.1258.28 via Frontend Transport; Tue, 12 Mar 2024 18:08:02 +0000 From: To: CC: , Shai Brandes Subject: [PATCH v4 18/31] net/ena/base: check for existing keep alive notification Date: Tue, 12 Mar 2024 20:07:03 +0200 Message-ID: <20240312180716.8515-19-shaibran@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240312180716.8515-1-shaibran@amazon.com> References: <20240312180716.8515-1-shaibran@amazon.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org From: Shai Brandes This commit adds an API to query the aenq on whether there is a pending keep alive notification. Signed-off-by: Shai Brandes Reviewed-by: Amit Bernstein --- drivers/net/ena/base/ena_com.c | 39 ++++++++++++++++++++++++++++++++++ drivers/net/ena/base/ena_com.h | 10 +++++++++ 2 files changed, 49 insertions(+) diff --git a/drivers/net/ena/base/ena_com.c b/drivers/net/ena/base/ena_com.c index 8e9c112715..f9613f7807 100644 --- a/drivers/net/ena/base/ena_com.c +++ b/drivers/net/ena/base/ena_com.c @@ -2456,6 +2456,45 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data) mmiowb(); } +bool ena_com_aenq_has_keep_alive(struct ena_com_dev *ena_dev) +{ + struct ena_admin_aenq_common_desc *aenq_common; + struct ena_com_aenq *aenq = &ena_dev->aenq; + struct ena_admin_aenq_entry *aenq_e; + u8 phase = aenq->phase; + u16 masked_head; + + masked_head = aenq->head & (aenq->q_depth - 1); + aenq_e = &aenq->entries[masked_head]; /* Get first entry */ + aenq_common = &aenq_e->aenq_common_desc; + + /* Go over all the events */ + while ((READ_ONCE8(aenq_common->flags) & + ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) { + /* Make sure the device finished writing the rest of the descriptor + * before reading it. + */ + dma_rmb(); + + if (aenq_common->group == ENA_ADMIN_KEEP_ALIVE) + return true; + + /* Get next event entry */ + masked_head++; + + if (unlikely(masked_head == aenq->q_depth)) { + masked_head = 0; + phase = !phase; + } + + aenq_e = &aenq->entries[masked_head]; + aenq_common = &aenq_e->aenq_common_desc; + } + + return false; +} + + int ena_com_dev_reset(struct ena_com_dev *ena_dev, enum ena_regs_reset_reason_types reset_reason) { diff --git a/drivers/net/ena/base/ena_com.h b/drivers/net/ena/base/ena_com.h index c999cd2381..737747f64b 100644 --- a/drivers/net/ena/base/ena_com.h +++ b/drivers/net/ena/base/ena_com.h @@ -639,6 +639,16 @@ void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev); */ void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data); +/* ena_com_aenq_has_keep_alive - Retrieve if there is a keep alive notification in the aenq + * @ena_dev: ENA communication layer struct + * + * This method goes over the async event notification queue and returns if there + * is a keep alive notification. + * + * @return - true if there is a keep alive notification in the aenq or false otherwise + */ +bool ena_com_aenq_has_keep_alive(struct ena_com_dev *ena_dev); + /* ena_com_abort_admin_commands - Abort all the outstanding admin commands. * @ena_dev: ENA communication layer struct *