From patchwork Mon Mar 26 20:15:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 10308635 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 1FF3F60212 for ; Mon, 26 Mar 2018 20:14:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1714329844 for ; Mon, 26 Mar 2018 20:14:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0907C29846; Mon, 26 Mar 2018 20:14:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 69D2F29844 for ; Mon, 26 Mar 2018 20:14:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=dVX7ODWeokAjF+4qx8i+RELlXZ82l3N8rFx/0xYLRRs=; b=dBKM9cZuNkEfn5 0UrLQuR+4GTkEElYVoZOy1lqoJrCbapiT8Pt0aXgjADaw6uXh6a1B/VK5dYLXKioCIw+M8VhZxadE BXdzNE6ynz9DZGVI063Myxbfz3lHY2yJmeEBkf5Yg5Msnhjp5QbBx79D4N8kBRZ+WuJkxmicOFXAN Q09kRBLfIiXO1R/aMV0FoNorGs3xxG+lJORlTGFUA87VZC//02kJrDbn9+tjuJO1MgHB9ry8eXndb J9raWZk+S5GkczCVRo1o283VjKw163znnZqgcQUOhYCizb4iZEeqmrxp+uGfe12+lQUjKkDcs9H1f NeUtAQ/2+LydJ7YtMEZg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f0YVm-0000vq-S9; Mon, 26 Mar 2018 20:14:34 +0000 Received: from lelnx194.ext.ti.com ([198.47.27.80]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f0YUF-00087U-Qk for linux-arm-kernel@lists.infradead.org; Mon, 26 Mar 2018 20:13:01 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id w2QKCbI0003042; Mon, 26 Mar 2018 15:12:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1522095157; bh=DYI06GI9WAB63Q7JHNyTa3MDwCkf4eeYmWCYPlOIDWk=; h=From:To:Subject:Date:In-Reply-To:References; b=E5emqtJBsU0GiYKf2vWUCoIKlKWzTzmGmPFeA2igJwPhAqzOaGoB3aapwz5zvcMgX sOwki+Emm2vAodyF649shC0E+hGFVTZNCm/0loWjJj2SvGMzRKH/rqNCmdtnt0Grxd lcMq5tt08MEEwl5FUFqag6vqoB4hGvWOs3Da2cYo= Received: from DFLE110.ent.ti.com (dfle110.ent.ti.com [10.64.6.31]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w2QKCbZv002094; Mon, 26 Mar 2018 15:12:37 -0500 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1261.35; Mon, 26 Mar 2018 15:12:36 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1261.35 via Frontend Transport; Mon, 26 Mar 2018 15:12:36 -0500 Received: from ula0868495.am.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w2QKCYLM005546; Mon, 26 Mar 2018 15:12:36 -0500 From: Murali Karicheri To: , , , , , , , , , Subject: [net-next PATCH 2/5] soc: ti: K2G: provide APIs to support driver probe deferral Date: Mon, 26 Mar 2018 16:15:09 -0400 Message-ID: <1522095312-23249-3-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1522095312-23249-1-git-send-email-m-karicheri2@ti.com> References: <1522095312-23249-1-git-send-email-m-karicheri2@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180326_131259_961736_21051270 X-CRM114-Status: GOOD ( 15.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch provide APIs to allow client drivers to support probe deferral. On K2G SoC, devices can be probed only after the ti_sci_pm_domains driver is probed and ready. As drivers may get probed at different order, any driver that depends on knav dma and qmss drivers, for example netcp network driver, needs to defer probe until knav devices are probed and ready to service. To do this, add an API to query the device ready status from the knav dma and qmss devices. Signed-off-by: Murali Karicheri --- drivers/soc/ti/knav_dma.c | 8 ++++++++ drivers/soc/ti/knav_qmss_queue.c | 8 ++++++++ include/linux/soc/ti/knav_dma.h | 12 ++++++++++++ include/linux/soc/ti/knav_qmss.h | 1 + 4 files changed, 29 insertions(+) diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c index 026182d..224d7dd 100644 --- a/drivers/soc/ti/knav_dma.c +++ b/drivers/soc/ti/knav_dma.c @@ -134,6 +134,13 @@ struct knav_dma_chan { static struct knav_dma_pool_device *kdev; +static bool device_ready; +bool knav_dma_device_ready(void) +{ + return device_ready; +} +EXPORT_SYMBOL_GPL(knav_dma_device_ready); + static bool check_config(struct knav_dma_chan *chan, struct knav_dma_cfg *cfg) { if (!memcmp(&chan->cfg, cfg, sizeof(*cfg))) @@ -773,6 +780,7 @@ static int knav_dma_probe(struct platform_device *pdev) debugfs_create_file("knav_dma", S_IFREG | S_IRUGO, NULL, NULL, &knav_dma_debug_ops); + device_ready = true; return ret; } diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c index 5b2c4e9..f0e67aa 100644 --- a/drivers/soc/ti/knav_qmss_queue.c +++ b/drivers/soc/ti/knav_qmss_queue.c @@ -74,6 +74,13 @@ */ const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"}; +static bool device_ready; +bool knav_qmss_device_ready(void) +{ + return device_ready; +} +EXPORT_SYMBOL_GPL(knav_qmss_device_ready); + /** * knav_queue_notify: qmss queue notfier call * @@ -1849,6 +1856,7 @@ static int knav_queue_probe(struct platform_device *pdev) debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL, &knav_queue_debug_ops); + device_ready = true; return 0; err: diff --git a/include/linux/soc/ti/knav_dma.h b/include/linux/soc/ti/knav_dma.h index 66693bc..7127ec3 100644 --- a/include/linux/soc/ti/knav_dma.h +++ b/include/linux/soc/ti/knav_dma.h @@ -167,6 +167,8 @@ struct knav_dma_desc { void *knav_dma_open_channel(struct device *dev, const char *name, struct knav_dma_cfg *config); void knav_dma_close_channel(void *channel); +int knav_dma_get_flow(void *channel); +bool knav_dma_device_ready(void); #else static inline void *knav_dma_open_channel(struct device *dev, const char *name, struct knav_dma_cfg *config) @@ -176,6 +178,16 @@ static inline void *knav_dma_open_channel(struct device *dev, const char *name, static inline void knav_dma_close_channel(void *channel) {} +static inline int knav_dma_get_flow(void *channel) +{ + return -EINVAL; +} + +static inline bool knav_dma_device_ready(void) +{ + return false; +} + #endif #endif /* __SOC_TI_KEYSTONE_NAVIGATOR_DMA_H__ */ diff --git a/include/linux/soc/ti/knav_qmss.h b/include/linux/soc/ti/knav_qmss.h index 9f0ebb3b..9745df6 100644 --- a/include/linux/soc/ti/knav_qmss.h +++ b/include/linux/soc/ti/knav_qmss.h @@ -86,5 +86,6 @@ int knav_pool_desc_map(void *ph, void *desc, unsigned size, void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz); dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt); void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma); +bool knav_qmss_device_ready(void); #endif /* __SOC_TI_KNAV_QMSS_H__ */