From patchwork Thu Aug 6 06:40:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hemant Kumar X-Patchwork-Id: 250756 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3B82C4363C for ; Thu, 6 Aug 2020 11:04:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF13122CAE for ; Thu, 6 Aug 2020 11:04:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="DGutri21" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728105AbgHFGlN (ORCPT ); Thu, 6 Aug 2020 02:41:13 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:16410 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726051AbgHFGlL (ORCPT ); Thu, 6 Aug 2020 02:41:11 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1596696070; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=Af/VYpmvsEYjvi37Y3sUb2zwrhWwLcQmLuM0BoB0o78=; b=DGutri21PFQEkpTW1hkPIcYO0VUoEVSZF0xVn+jThfH7bFgkB2NsNbKKsoRM9Ka1YvERyr7M 6XQo/+X9aWaYlvsBeCEnmumikRsnYnxgjlpxhiXYY0Jf9XgvtpNrthDdz/RwePtoaHQEl//v 9AWQMVzXGTlZd9bk4J6ihDtpgKk= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-west-2.postgun.com with SMTP id 5f2ba6063f2ce11020000663 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 06 Aug 2020 06:41:10 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 30381C433C9; Thu, 6 Aug 2020 06:41:10 +0000 (UTC) Received: from codeaurora.org (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: hemantk) by smtp.codeaurora.org (Postfix) with ESMTPSA id 54765C433C9; Thu, 6 Aug 2020 06:41:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 54765C433C9 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=hemantk@codeaurora.org From: Hemant Kumar To: gregkh@linuxfoundation.org, manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, jhugo@codeaurora.org, bbhatt@codeaurora.org, Hemant Kumar Subject: [PATCH v5 0/4] user space client interface driver Date: Wed, 5 Aug 2020 23:40:59 -0700 Message-Id: <1596696063-17802-1-git-send-email-hemantk@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org V5: - Removed mhi_uci_drv structure. - Used idr instead of creating global list of uci devices. - Used kref instead of local ref counting for uci device and open count. - Removed unlikely macro. V4: - Fix locking to protect proper struct members. - Updated documentation describing uci client driver use cases. - Fixed uci ref counting in mhi_uci_open for error case. - Addressed style related review comments. V3: Added documentation for MHI UCI driver. V2: Added mutex lock to prevent multiple readers to access same mhi buffer which can result into use after free. Hemant Kumar (4): bus: mhi: core: Add helper API to return number of free TREs bus: mhi: core: Move MHI_MAX_MTU to external header file docs: Add documentation for userspace client interface bus: mhi: clients: Add userspace client interface driver Documentation/mhi/index.rst | 1 + Documentation/mhi/uci.rst | 39 +++ drivers/bus/mhi/Kconfig | 6 + drivers/bus/mhi/Makefile | 1 + drivers/bus/mhi/clients/Kconfig | 15 + drivers/bus/mhi/clients/Makefile | 3 + drivers/bus/mhi/clients/uci.c | 662 +++++++++++++++++++++++++++++++++++++++ drivers/bus/mhi/core/internal.h | 1 - drivers/bus/mhi/core/main.c | 12 + include/linux/mhi.h | 12 + 10 files changed, 751 insertions(+), 1 deletion(-) create mode 100644 Documentation/mhi/uci.rst create mode 100644 drivers/bus/mhi/clients/Kconfig create mode 100644 drivers/bus/mhi/clients/Makefile create mode 100644 drivers/bus/mhi/clients/uci.c