From patchwork Wed Jul 31 19:56:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 11069197 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9FC67174A for ; Wed, 31 Jul 2019 20:01:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 904E6209CE for ; Wed, 31 Jul 2019 20:01:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 835ED27C2D; Wed, 31 Jul 2019 20:01:39 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D809219AC for ; Wed, 31 Jul 2019 20:01:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729569AbfGaUBd (ORCPT ); Wed, 31 Jul 2019 16:01:33 -0400 Received: from mout.kundenserver.de ([212.227.126.135]:51513 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727411AbfGaUBc (ORCPT ); Wed, 31 Jul 2019 16:01:32 -0400 Received: from threadripper.lan ([149.172.19.189]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.129]) with ESMTPA (Nemesis) id 1MElhb-1i8Xgp2Pet-00GM78; Wed, 31 Jul 2019 22:00:56 +0200 From: Arnd Bergmann To: soc@kernel.org, linux-arm-kernel@lists.infradead.org, Vladimir Zapolskiy , Sylvain Lemieux , Russell King , Gregory Clement , Linus Walleij Cc: Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , "David S. Miller" , Greg Kroah-Hartman , Alan Stern , Guenter Roeck , linux-gpio@vger.kernel.org, netdev@vger.kernel.org, linux-serial@vger.kernel.org, linux-usb@vger.kernel.org, linux-watchdog@vger.kernel.org, Arnd Bergmann , linux-kernel@vger.kernel.org Subject: [PATCH 06/14] net: lpc-enet: factor out iram access Date: Wed, 31 Jul 2019 21:56:48 +0200 Message-Id: <20190731195713.3150463-7-arnd@arndb.de> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20190731195713.3150463-1-arnd@arndb.de> References: <20190731195713.3150463-1-arnd@arndb.de> MIME-Version: 1.0 X-Provags-ID: V03:K1:SIR+StTg1yfrJOk+RcwJDCCTVUYEqRYGtvhttUvKUj31xjabS6n 0LjT+qb3UAb0wMRK253nbzu3yZ3hPz+pIxmA9ovy6x6yoAvgMjctqBTKYeNdbeO3ryTQq28 p/9wr3WFSy9q6FjN5nQAi3ktBtB0uKTJHmeIssaTO4h7KjjpJ9grdl8muSebBIPnDH93laV 3vxDTuWhUy1AUE1bdegow== X-UI-Out-Filterresults: notjunk:1;V03:K0:oRuu35Z+Gjo=:s5+pnERwtAQyP8VJgqAt49 l0k5KqbH9+SS96l4h+t7GvVd1LVAAALILTBfI4FIqIlR10dLieS9fbqrdjL2AQ8WyRaRqOD6W epTKa71yW0dKFbxFd7fzUBx9uvpSW/aLQdPEZDpGrgeJO7mi5B3Wwed3PIXDydKimGUhVRqU2 r/pe2z4V0WzBxz/E4hpeXgbTLft2IESnaRgLyIj1MGF62B8RdKPY2Ww4LvX6oHBj93pLER+Ne T8gmc/dSSkveTkm4kODVLzeWW9wQ5fme4TpyOnYibFO09p4n4OjViFaHBr69bv3YUYhtitzNv vB+MdT8votc29osLornsNrAUeWjVj8hN7O/Pq0vGo41TILFk/9fWyYnJqgT51E0/tWnfKIDVk FI+iwbCPxaA8Mp4gNKH5YZG+O0vQJld5RQZfh+UqvEpFObW/z7qP2ZvOqM2DLR18ZcOM6hQHb 4gegkDsNTebUejDsUoTub4JH4mDFCADIQV5ksAXprlZIcylvj1aLVgpsYcfY8eumW5O10CZmJ 1sw0dflgSdQQ1vHUczcQtEeuULSE9v+Ut+scmAwoNWZduHiN988x4HYFI7g7PHnMoTbf1FCqY yCmsKnSFvA0Vlw6LqowlAAEtPRZDIC3z1pMhGV+yW40QH0mkRF7qhig45pytv3oUneJF56cFi EiybDCqbeBLnSQfInzg22sf8KSPgsVL/8YCanPEE35FDEm8RF+5Y/EpIruCWZ1wrrd2VQtEKX ALqUR6CJ8FkCg3jSiJqjqpftcnb7idgRTWcyIw== Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The lpc_eth driver uses a platform specific method to find the internal sram. This prevents building it on other machines. Rework to only use one function call and keep the other platform internals where they belong. Ideally this would look up the sram location from DT, but as this is a rarely used driver, I want to keep the modifications to a minimum. Signed-off-by: Arnd Bergmann --- arch/arm/mach-lpc32xx/common.c | 9 ++++++-- arch/arm/mach-lpc32xx/common.h | 1 - arch/arm/mach-lpc32xx/include/mach/board.h | 15 -------------- drivers/net/ethernet/nxp/lpc_eth.c | 17 ++++++++------- include/linux/soc/nxp/lpc32xx-misc.h | 24 ++++++++++++++++++++++ 5 files changed, 39 insertions(+), 27 deletions(-) delete mode 100644 arch/arm/mach-lpc32xx/include/mach/board.h create mode 100644 include/linux/soc/nxp/lpc32xx-misc.h diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c index 5b71b4fab2cd..f648324d5fb4 100644 --- a/arch/arm/mach-lpc32xx/common.c +++ b/arch/arm/mach-lpc32xx/common.c @@ -8,6 +8,7 @@ */ #include +#include #include #include @@ -32,7 +33,7 @@ void lpc32xx_get_uid(u32 devid[4]) */ #define LPC32XX_IRAM_BANK_SIZE SZ_128K static u32 iram_size; -u32 lpc32xx_return_iram_size(void) +u32 lpc32xx_return_iram(void __iomem **mapbase, dma_addr_t *dmaaddr) { if (iram_size == 0) { u32 savedval1, savedval2; @@ -53,10 +54,14 @@ u32 lpc32xx_return_iram_size(void) } else iram_size = LPC32XX_IRAM_BANK_SIZE * 2; } + if (dmaaddr) + *dmaaddr = LPC32XX_IRAM_BASE; + if (mapbase) + *mapbase = io_p2v(LPC32XX_IRAM_BASE); return iram_size; } -EXPORT_SYMBOL_GPL(lpc32xx_return_iram_size); +EXPORT_SYMBOL_GPL(lpc32xx_return_iram); static struct map_desc lpc32xx_io_desc[] __initdata = { { diff --git a/arch/arm/mach-lpc32xx/common.h b/arch/arm/mach-lpc32xx/common.h index 8e597ce48a73..32f0ad217807 100644 --- a/arch/arm/mach-lpc32xx/common.h +++ b/arch/arm/mach-lpc32xx/common.h @@ -23,7 +23,6 @@ extern void __init lpc32xx_serial_init(void); */ extern void lpc32xx_get_uid(u32 devid[4]); -extern u32 lpc32xx_return_iram_size(void); /* * Pointers used for sizing and copying suspend function data */ diff --git a/arch/arm/mach-lpc32xx/include/mach/board.h b/arch/arm/mach-lpc32xx/include/mach/board.h deleted file mode 100644 index 476513d970a4..000000000000 --- a/arch/arm/mach-lpc32xx/include/mach/board.h +++ /dev/null @@ -1,15 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* - * arm/arch/mach-lpc32xx/include/mach/board.h - * - * Author: Kevin Wells - * - * Copyright (C) 2010 NXP Semiconductors - */ - -#ifndef __ASM_ARCH_BOARD_H -#define __ASM_ARCH_BOARD_H - -extern u32 lpc32xx_return_iram_size(void); - -#endif /* __ASM_ARCH_BOARD_H */ diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c index f7e11f1b0426..bcdd0adcfb0c 100644 --- a/drivers/net/ethernet/nxp/lpc_eth.c +++ b/drivers/net/ethernet/nxp/lpc_eth.c @@ -18,8 +18,8 @@ #include #include #include +#include -#include #include #include @@ -1311,16 +1311,15 @@ static int lpc_eth_drv_probe(struct platform_device *pdev) /* Get size of DMA buffers/descriptors region */ pldat->dma_buff_size = (ENET_TX_DESC + ENET_RX_DESC) * (ENET_MAXF_SIZE + sizeof(struct txrx_desc_t) + sizeof(struct rx_status_t)); - pldat->dma_buff_base_v = 0; if (use_iram_for_net(dev)) { - dma_handle = LPC32XX_IRAM_BASE; - if (pldat->dma_buff_size <= lpc32xx_return_iram_size()) - pldat->dma_buff_base_v = - io_p2v(LPC32XX_IRAM_BASE); - else + if (pldat->dma_buff_size > + lpc32xx_return_iram(&pldat->dma_buff_base_v, &dma_handle)) { + pldat->dma_buff_base_v = NULL; + pldat->dma_buff_size = 0; netdev_err(ndev, "IRAM not big enough for net buffers, using SDRAM instead.\n"); + } } if (pldat->dma_buff_base_v == 0) { @@ -1409,7 +1408,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev) unregister_netdev(ndev); err_out_dma_unmap: if (!use_iram_for_net(dev) || - pldat->dma_buff_size > lpc32xx_return_iram_size()) + pldat->dma_buff_size > lpc32xx_return_iram(NULL, NULL)) dma_free_coherent(dev, pldat->dma_buff_size, pldat->dma_buff_base_v, pldat->dma_buff_base_p); @@ -1436,7 +1435,7 @@ static int lpc_eth_drv_remove(struct platform_device *pdev) unregister_netdev(ndev); if (!use_iram_for_net(&pldat->pdev->dev) || - pldat->dma_buff_size > lpc32xx_return_iram_size()) + pldat->dma_buff_size > lpc32xx_return_iram(NULL, NULL)) dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size, pldat->dma_buff_base_v, pldat->dma_buff_base_p); diff --git a/include/linux/soc/nxp/lpc32xx-misc.h b/include/linux/soc/nxp/lpc32xx-misc.h new file mode 100644 index 000000000000..f232e1a1bcdc --- /dev/null +++ b/include/linux/soc/nxp/lpc32xx-misc.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Author: Kevin Wells + * + * Copyright (C) 2010 NXP Semiconductors + */ + +#ifndef __SOC_LPC32XX_MISC_H +#define __SOC_LPC32XX_MISC_H + +#include + +#ifdef CONFIG_ARCH_LPC32XX +extern u32 lpc32xx_return_iram(void __iomem **mapbase, dma_addr_t *dmaaddr); +#else +static inline u32 lpc32xx_return_iram(void __iomem **mapbase, dma_addr_t *dmaaddr) +{ + *mapbase = NULL; + *dmaaddr = 0; + return 0; +} +#endif + +#endif /* __SOC_LPC32XX_MISC_H */