From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 7EC9BC2BA19 for ; Fri, 24 Apr 2020 03:02:26 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 35E2B2074F for ; Fri, 24 Apr 2020 03:02:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35E2B2074F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=vivo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 497f9D4031zDqWg for ; Fri, 24 Apr 2020 13:02:24 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vivo.com (client-ip=59.111.176.16; helo=m17616.mail.qiye.163.com; envelope-from=wenhu.wang@vivo.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=vivo.com Received: from m17616.mail.qiye.163.com (m17616.mail.qiye.163.com [59.111.176.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 497drK275kzDr6B for ; Fri, 24 Apr 2020 12:47:45 +1000 (AEST) Received: from ubuntu.localdomain (unknown [58.251.74.226]) by m17616.mail.qiye.163.com (Hmail) with ESMTPA id 5F729106A2C; Fri, 24 Apr 2020 10:47:38 +0800 (CST) From: Wang Wenhu To: gregkh@linuxfoundation.org, arnd@arndb.de, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3, 5/5] powerpc: sysdev: support userspace access of fsl_85xx_sram Date: Thu, 23 Apr 2020 19:45:54 -0700 Message-Id: <20200424024554.30709-6-wenhu.wang@vivo.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200424024554.30709-1-wenhu.wang@vivo.com> References: <20200424024554.30709-1-wenhu.wang@vivo.com> X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZSVVOSUtCQkJCS0NPT0xJTFlXWShZQU hPN1dZLVlBSVdZCQ4XHghZQVk1NCk2OjckKS43PlkG X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6PVE6GDo6NTg3NFYVOCoULww8 S08wCRpVSlVKTkNMTUJNT05CS09PVTMWGhIXVQweFRMOVQwaFRw7DRINFFUYFBZFWVdZEgtZQVlO Q1VJTkpVTE9VSUlNWVdZCAFZQUxPS043Bg++ X-HM-Tid: 0a71aa155c469374kuws5f729106a2c X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: robh@kernel.org, oss@buserror.net, kernel@vivo.com, paulus@samba.org, Wang Wenhu Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" New module which registers its memory allocation and free APIs to the sram_dynamic module, which would create a device of struct sram_device type to act as an interface for user level applications to access the backend hardware device, fsl_85xx_cache_sram, which is drived by the FSL_85XX_CACHE_SRAM module. Signed-off-by: Wang Wenhu Cc: Christophe Leroy Cc: Scott Wood Cc: Michael Ellerman Cc: Greg Kroah-Hartman Cc: Arnd Bergmann Cc: linuxppc-dev@lists.ozlabs.org --- .../powerpc/include/asm/fsl_85xx_cache_sram.h | 4 ++ arch/powerpc/platforms/85xx/Kconfig | 10 +++++ arch/powerpc/sysdev/Makefile | 1 + arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h | 6 +++ arch/powerpc/sysdev/fsl_85xx_cache_sram.c | 12 ++++++ arch/powerpc/sysdev/fsl_85xx_sram_uapi.c | 39 +++++++++++++++++++ 6 files changed, 72 insertions(+) create mode 100644 arch/powerpc/sysdev/fsl_85xx_sram_uapi.c diff --git a/arch/powerpc/include/asm/fsl_85xx_cache_sram.h b/arch/powerpc/include/asm/fsl_85xx_cache_sram.h index 0235a0447baa..99cb7e202c38 100644 --- a/arch/powerpc/include/asm/fsl_85xx_cache_sram.h +++ b/arch/powerpc/include/asm/fsl_85xx_cache_sram.h @@ -26,6 +26,10 @@ struct mpc85xx_cache_sram { unsigned int size; rh_info_t *rh; spinlock_t lock; + +#ifdef CONFIG_FSL_85XX_SRAM_UAPI + struct device *dev; +#endif }; extern void mpc85xx_cache_sram_free(void *ptr); diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig index fa3d29dcb57e..3a6f6af973eb 100644 --- a/arch/powerpc/platforms/85xx/Kconfig +++ b/arch/powerpc/platforms/85xx/Kconfig @@ -16,6 +16,16 @@ if FSL_SOC_BOOKE if PPC32 +config FSL_85XX_SRAM_UAPI + tristate "Freescale MPC85xx SRAM UAPI Support" + depends on FSL_SOC_BOOKE && SRAM_DYNAMIC + select FSL_85XX_CACHE_SRAM + help + This registers a device of struct sram_device type which would act as + an interface for user level applications to access the Freescale 85xx + Cache-SRAM memory dynamically, meaning allocate on demand dynamically + while they are running. + config FSL_85XX_CACHE_SRAM bool select PPC_LIB_RHEAP diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index cb5a5bd2cef5..e71f82f0d2c3 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_FSL_CORENET_RCPM) += fsl_rcpm.o obj-$(CONFIG_FSL_LBC) += fsl_lbc.o obj-$(CONFIG_FSL_GTM) += fsl_gtm.o obj-$(CONFIG_FSL_85XX_CACHE_SRAM) += fsl_85xx_l2ctlr.o fsl_85xx_cache_sram.o +obj-$(CONFIG_FSL_85XX_SRAM_UAPI) += fsl_85xx_sram_uapi.o obj-$(CONFIG_FSL_RIO) += fsl_rio.o fsl_rmu.o obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o obj-$(CONFIG_RTC_DRV_CMOS) += rtc_cmos_setup.o diff --git a/arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h b/arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h index ce370749add9..4930784d9852 100644 --- a/arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h +++ b/arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h @@ -10,6 +10,8 @@ #ifndef __FSL_85XX_CACHE_CTLR_H__ #define __FSL_85XX_CACHE_CTLR_H__ +#include + #define L2CR_L2FI 0x40000000 /* L2 flash invalidate */ #define L2CR_L2IO 0x00200000 /* L2 instruction only */ #define L2CR_SRAM_ZERO 0x00000000 /* L2SRAM zero size */ @@ -81,6 +83,10 @@ struct sram_parameters { phys_addr_t sram_offset; }; +#ifdef CONFIG_FSL_85XX_SRAM_UAPI +extern struct mpc85xx_cache_sram *mpc85xx_get_cache_sram(void); +#endif + extern int instantiate_cache_sram(struct platform_device *dev, struct sram_parameters sram_params); extern void remove_cache_sram(struct platform_device *dev); diff --git a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c index 3de5ac8382c0..0156ea63a3a2 100644 --- a/arch/powerpc/sysdev/fsl_85xx_cache_sram.c +++ b/arch/powerpc/sysdev/fsl_85xx_cache_sram.c @@ -23,6 +23,14 @@ struct mpc85xx_cache_sram *cache_sram; + +#ifdef CONFIG_FSL_85XX_SRAM_UAPI +struct mpc85xx_cache_sram *mpc85xx_get_cache_sram(void) +{ + return cache_sram; +} +#endif + void *mpc85xx_cache_sram_alloc(unsigned int size, phys_addr_t *phys, unsigned int align) { @@ -115,6 +123,10 @@ int instantiate_cache_sram(struct platform_device *dev, rh_attach_region(cache_sram->rh, 0, cache_sram->size); spin_lock_init(&cache_sram->lock); +#ifdef CONFIG_FSL_85XX_SRAM_UAPI + cache_sram->dev = &dev->dev; +#endif + dev_info(&dev->dev, "[base:0x%llx, size:0x%x] configured and loaded\n", (unsigned long long)cache_sram->base_phys, cache_sram->size); diff --git a/arch/powerpc/sysdev/fsl_85xx_sram_uapi.c b/arch/powerpc/sysdev/fsl_85xx_sram_uapi.c new file mode 100644 index 000000000000..60190bf3c8e9 --- /dev/null +++ b/arch/powerpc/sysdev/fsl_85xx_sram_uapi.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Vivo Communication Technology Co. Ltd. + * Copyright (C) 2020 Wang Wenhu + * All rights reserved. + */ + +#include +#include +#include +#include +#include "fsl_85xx_cache_ctlr.h" + +static struct sram_api mpc85xx_sram_api = { + .name = "mpc85xx_sram", + .alloc = mpc85xx_cache_sram_alloc, + .free = mpc85xx_cache_sram_free, +}; + +static int __init mpc85xx_sram_uapi_init(void) +{ + struct mpc85xx_cache_sram *sram = mpc85xx_get_cache_sram(); + + if (!sram) + return -ENODEV; + + return sram_register_device(sram->dev, &mpc85xx_sram_api); +} +subsys_initcall(mpc85xx_sram_uapi_init); + +static void __exit mpc85xx_sram_uapi_exit(void) +{ + sram_unregister_device(&mpc85xx_sram_api); +} +module_exit(mpc85xx_sram_uapi_exit); + +MODULE_AUTHOR("Wang Wenhu "); +MODULE_DESCRIPTION("MPC85xx SRAM User-Space API Support"); +MODULE_LICENSE("GPL v2"); -- 2.17.1