From patchwork Mon Apr 2 14:37:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 10319933 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 4A7B060375 for ; Mon, 2 Apr 2018 14:55:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3881828AA7 for ; Mon, 2 Apr 2018 14:55:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2CAAB28ADE; Mon, 2 Apr 2018 14:55:17 +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 BA0C328AA7 for ; Mon, 2 Apr 2018 14:55:16 +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=zH3k8/Ti61fN9Q55xHODfl7VeotKsdDdSukTgGhquqc=; b=BpIfZSV2GL5hS5 0BCWocflYod/92e9kBjR1ouVUn6jhp9/YWDYEN5dPZ9pqrXFhR2FplsIWBmMSoheopu2TDgNqlYEn ThuDLS034vC0Iv8Yt2b2HTYTto+jsl8AH8YJTUejXbEQrQAT7ZBRqxJ3MbYcEZHiRoBQUuF9zCfmg wf9VTEamr4LAnzGLRb+an3/jSnHxXq+OcDOJY13qzIDtoFUSWy5Ej3oShlKA2fgW/fqjbFwA12wFt kP2zALuMppgbol4pUcvhmxkt7CughUB0CBbGPDiDfEydjzrikE2vSoHIZChhsPWstw0A873JbV0Tb DsLAxah2t7mXJPW23PJg==; 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 1f30rS-0001Yh-OX; Mon, 02 Apr 2018 14:55:06 +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 1f30Yi-00045i-N4 for linux-arm-kernel@lists.infradead.org; Mon, 02 Apr 2018 14:35:51 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id w32EZMGE032011; Mon, 2 Apr 2018 09:35:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1522679722; bh=molNR0cvWw2C4RTDn5FWSn8fOGSs1AHMu4D40o1EvwU=; h=From:To:Subject:Date:In-Reply-To:References; b=GKkMduXO2tE4mdqS+8zr1l8u+sxpAOmOW02qVb+aEXImEY8tRnJeF+Ycs6eVOFd0Y rGv4Ag/LlA+QYJVnB/dYzKUPqg/pKgaPRAcTsNeRDON90KXxj+26anKRPB6KyOvYCG ETRC5nsrF9fA4zQXaLgOsgmk9/gORlcGQkZNgZPc= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w32EZMqh024804; Mon, 2 Apr 2018 09:35:22 -0500 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1261.35; Mon, 2 Apr 2018 09:35:22 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1261.35 via Frontend Transport; Mon, 2 Apr 2018 09:35:21 -0500 Received: from ula0868495.am.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id w32EZKbx025486; Mon, 2 Apr 2018 09:35:21 -0500 From: Murali Karicheri To: , , , , , , , , , Subject: [net-next PATCH v3 02/11] soc: ti: K2G: provide APIs to support driver probe deferral Date: Mon, 2 Apr 2018 10:37:52 -0400 Message-ID: <1522679881-25643-3-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1522679881-25643-1-git-send-email-m-karicheri2@ti.com> References: <1522679881-25643-1-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-20180402_073544_864696_A4BBE248 X-CRM114-Status: GOOD ( 17.29 ) 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 8526c8e..419365a 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__ */