From patchwork Thu May 20 14:01:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kumar, M Chetan" X-Patchwork-Id: 12270427 X-Patchwork-Delegate: johannes@sipsolutions.net 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 76B20C433B4 for ; Thu, 20 May 2021 14:07:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5DBC46100A for ; Thu, 20 May 2021 14:07:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242871AbhETOIr (ORCPT ); Thu, 20 May 2021 10:08:47 -0400 Received: from mga11.intel.com ([192.55.52.93]:5246 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240011AbhETOHj (ORCPT ); Thu, 20 May 2021 10:07:39 -0400 IronPort-SDR: iq0tf0nEsKBJ7tEVCtKaAjs4JJmzp1DM9m+zPSzxqM7lYcB4w8CzOPL5yE0w0rNx1EGyMVsG9M qNAOSUtdmOvw== X-IronPort-AV: E=McAfee;i="6200,9189,9989"; a="198144597" X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="198144597" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 May 2021 07:02:47 -0700 IronPort-SDR: Hn1UBBxrneZ71TeM+nRUBxmqj2BDyHDmQO6PDXAuyz4d/LYN2kmdpb9OPbE6nxHxFATi92vBBS 4dHUHpdBb9CQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="631407557" Received: from bgsxx0031.iind.intel.com ([10.106.222.40]) by fmsmga005.fm.intel.com with ESMTP; 20 May 2021 07:02:45 -0700 From: M Chetan Kumar To: netdev@vger.kernel.org, linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net, krishna.c.sudi@intel.com, linuxwwan@intel.com Subject: [PATCH V3 07/16] net: iosm: wwan port control device Date: Thu, 20 May 2021 19:31:49 +0530 Message-Id: <20210520140158.10132-8-m.chetan.kumar@intel.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20210520140158.10132-1-m.chetan.kumar@intel.com> References: <20210520140158.10132-1-m.chetan.kumar@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Implements wwan port for MBIM & AT protocol communication Signed-off-by: M Chetan Kumar --- v3: * Renamed file to iosm_ipc_port.c * WWAN PORT adaptation for AT & MBIM protocol communication. v2: * Renamed iosm_sio struct to iosm_cdev. * Added memory barriers around atomic operations. --- drivers/net/wwan/iosm/iosm_ipc_port.c | 85 +++++++++++++++++++++++++++ drivers/net/wwan/iosm/iosm_ipc_port.h | 50 ++++++++++++++++ 2 files changed, 135 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_port.c create mode 100644 drivers/net/wwan/iosm/iosm_ipc_port.h diff --git a/drivers/net/wwan/iosm/iosm_ipc_port.c b/drivers/net/wwan/iosm/iosm_ipc_port.c new file mode 100644 index 000000000000..beb944847398 --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_port.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-21 Intel Corporation. + */ + +#include "iosm_ipc_chnl_cfg.h" +#include "iosm_ipc_imem_ops.h" +#include "iosm_ipc_port.h" + +/* open logical channel for control communication */ +static int ipc_port_ctrl_start(struct wwan_port *port) +{ + struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); + int ret = 0; + + ipc_port->channel = ipc_imem_sys_port_open(ipc_port->ipc_imem, + ipc_port->chl_id, + IPC_HP_CDEV_OPEN); + if (!ipc_port->channel) + ret = -EIO; + + return ret; +} + +/* close logical channel */ +static void ipc_port_ctrl_stop(struct wwan_port *port) +{ + struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); + + ipc_imem_sys_cdev_close(ipc_port); +} + +/* transfer control data to modem */ +static int ipc_port_ctrl_tx(struct wwan_port *port, struct sk_buff *skb) +{ + struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port); + + return ipc_imem_sys_cdev_write(ipc_port, skb); +} + +static const struct wwan_port_ops ipc_wwan_ctrl_ops = { + .start = ipc_port_ctrl_start, + .stop = ipc_port_ctrl_stop, + .tx = ipc_port_ctrl_tx, +}; + +/* Port init func */ +struct iosm_cdev *ipc_port_init(struct iosm_imem *ipc_imem, + struct ipc_chnl_cfg ipc_port_cfg) +{ + struct iosm_cdev *ipc_port = kzalloc(sizeof(*ipc_port), GFP_KERNEL); + enum wwan_port_type port_type = ipc_port_cfg.wwan_port_type; + enum ipc_channel_id chl_id = ipc_port_cfg.id; + + if (!ipc_port) + return NULL; + + ipc_port->dev = ipc_imem->dev; + ipc_port->pcie = ipc_imem->pcie; + + ipc_port->port_type = port_type; + ipc_port->chl_id = chl_id; + ipc_port->ipc_imem = ipc_imem; + + ipc_port->iosm_port = wwan_create_port(ipc_port->dev, port_type, + &ipc_wwan_ctrl_ops, ipc_port); + + return ipc_port; +} + +/* Port deinit func */ +void ipc_port_deinit(struct iosm_cdev *port[]) +{ + struct iosm_cdev *ipc_port; + u8 ctrl_chl_nr; + + for (ctrl_chl_nr = 0; ctrl_chl_nr < IPC_MEM_MAX_CHANNELS; + ctrl_chl_nr++) { + if (port[ctrl_chl_nr]) { + ipc_port = port[ctrl_chl_nr]; + wwan_remove_port(ipc_port->iosm_port); + kfree(ipc_port); + } + } +} diff --git a/drivers/net/wwan/iosm/iosm_ipc_port.h b/drivers/net/wwan/iosm/iosm_ipc_port.h new file mode 100644 index 000000000000..11bc8ed21616 --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_port.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (C) 2020-21 Intel Corporation. + */ + +#ifndef IOSM_IPC_PORT_H +#define IOSM_IPC_PORT_H + +#include + +#include "iosm_ipc_imem_ops.h" + +/** + * struct iosm_cdev - State of the char driver layer. + * @iosm_port: Pointer of type wwan_port + * @ipc_imem: imem instance + * @dev: Pointer to device struct + * @pcie: PCIe component + * @port_type: WWAN port type + * @channel: Channel instance + * @chl_id: Channel Indentifier + */ +struct iosm_cdev { + struct wwan_port *iosm_port; + struct iosm_imem *ipc_imem; + struct device *dev; + struct iosm_pcie *pcie; + enum wwan_port_type port_type; + struct ipc_mem_channel *channel; + enum ipc_channel_id chl_id; +}; + +/** + * ipc_port_init - Allocate IPC port & register to wwan subsystem for AT/MBIM + * communication. + * @ipc_imem: Pointer to iosm_imem structure + * @ipc_port_cfg: IPC Port Config + * + * Returns: 0 on success & NULL on failure + */ +struct iosm_cdev *ipc_port_init(struct iosm_imem *ipc_imem, + struct ipc_chnl_cfg ipc_port_cfg); + +/** + * ipc_port_deinit - Free IPC port & unregister port with wwan subsystem. + * @ipc_port: Array of pointer to the ipc port data-struct + */ +void ipc_port_deinit(struct iosm_cdev *ipc_port[]); + +#endif