From patchwork Wed Aug 28 06:46:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junxian Huang X-Patchwork-Id: 13780772 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CC1E1448E6; Wed, 28 Aug 2024 06:51:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724827917; cv=none; b=pF6odG1Y/YRz60EnoWVt9kz5V1jtHHJXtmXoqB6fGzYFRhMq6+2FTcxTCalclyTS6h3e0mvq9MWzRyg+nw2/G40rL0r6oQGm1pXXvje92NnhaPqOkmhTv46dETM/ROIW1Ri3D2znmP9fW7UcjLbqVJYkdvt8ay8zfV4EJXL3lEE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724827917; c=relaxed/simple; bh=ztvcn8LTc1wNPg6zZTSXEQJytmb853G+7kwMM5CIXXU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rKZ1chXtXHWtbbTdA6yq8Zjkao/rbvaW5jHmdffnCfUBlM1R8u0ViKEBONa/5QmK3z07mKAs3/P959uYB1sQPi4oU3YvOlGCgfzcbL8tcTKdwebUXd3/6VmqdjxJM5sFD2/N6JBL544M3pAp6AQKT7jozEzqhHy/hgdnBiftLIQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=hisilicon.com; spf=pass smtp.mailfrom=hisilicon.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=hisilicon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hisilicon.com Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Wtw5X5ZM0zpTrS; Wed, 28 Aug 2024 14:50:08 +0800 (CST) Received: from kwepemf100018.china.huawei.com (unknown [7.202.181.17]) by mail.maildlp.com (Postfix) with ESMTPS id 88B771402CD; Wed, 28 Aug 2024 14:51:50 +0800 (CST) Received: from localhost.localdomain (10.90.30.45) by kwepemf100018.china.huawei.com (7.202.181.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 28 Aug 2024 14:51:50 +0800 From: Junxian Huang To: , CC: , , , Subject: [PATCH v3 for-next 2/2] RDMA/hns: Disassociate mmap pages for all uctx when HW is being reset Date: Wed, 28 Aug 2024 14:46:05 +0800 Message-ID: <20240828064605.887519-3-huangjunxian6@hisilicon.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240828064605.887519-1-huangjunxian6@hisilicon.com> References: <20240828064605.887519-1-huangjunxian6@hisilicon.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemf100018.china.huawei.com (7.202.181.17) From: Chengchang Tang When HW is being reset, userspace should not ring doorbell otherwise it may lead to abnormal consequence such as RAS. Disassociate mmap pages for all uctx to prevent userspace from ringing doorbell to HW. Fixes: 9a4435375cd1 ("IB/hns: Add driver files for hns RoCE driver") Signed-off-by: Chengchang Tang Signed-off-by: Junxian Huang --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index 621b057fb9da..ecf4f1c9f51d 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -7012,6 +7012,12 @@ static void hns_roce_hw_v2_uninit_instance(struct hnae3_handle *handle, handle->rinfo.instance_state = HNS_ROCE_STATE_NON_INIT; } + +static void hns_roce_v2_reset_notify_user(struct hns_roce_dev *hr_dev) +{ + rdma_user_mmap_disassociate(&hr_dev->ib_dev); +} + static int hns_roce_hw_v2_reset_notify_down(struct hnae3_handle *handle) { struct hns_roce_dev *hr_dev; @@ -7030,6 +7036,9 @@ static int hns_roce_hw_v2_reset_notify_down(struct hnae3_handle *handle) hr_dev->active = false; hr_dev->dis_db = true; + + hns_roce_v2_reset_notify_user(hr_dev); + hr_dev->state = HNS_ROCE_DEVICE_STATE_RST_DOWN; return 0;