From patchwork Thu Jan 31 09:31:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 10790199 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 B6A3491E for ; Thu, 31 Jan 2019 09:32:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B531830858 for ; Thu, 31 Jan 2019 09:32:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A8D49308E0; Thu, 31 Jan 2019 09:32:13 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 28F1D308E3 for ; Thu, 31 Jan 2019 09:32:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731587AbfAaJcH (ORCPT ); Thu, 31 Jan 2019 04:32:07 -0500 Received: from mail-pf1-f193.google.com ([209.85.210.193]:33195 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731681AbfAaJcG (ORCPT ); Thu, 31 Jan 2019 04:32:06 -0500 Received: by mail-pf1-f193.google.com with SMTP id c123so1233699pfb.0 for ; Thu, 31 Jan 2019 01:32:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=KYayTLAIjqbiHgbKVBbyF73pC5IYaCQpN6ywaeYZLhk=; b=X9j8cW90LeK2WsQyDgUHYwTnO3OihBXBDRBqlI7Tc1CJ7NuruPbmi0DTo3FNQbQjxd 0Gqb9vHPSR0CiPBhAHp9kpfvZieAkc5G70SYXUvPzJLvsRVh2KLKU1WkrQUJPrGiWKJu 5C0X0oGn/kMpST7Ljlsom3sMiPKw/nM7X0gJo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=KYayTLAIjqbiHgbKVBbyF73pC5IYaCQpN6ywaeYZLhk=; b=GAzmhnMvf30lhjMmzMVgCLLstK+MpZiLPwLAek4B0LjBhGzkzN8yr9va+2ufrXzKtl F8CRIqrH2CKJVZbMv3qR3K9zeeGrTTd+CULG++gxwqeBw8v+1iKqY/nJRmhXOh+HymbQ 7ROLUmzmvyhBDYuYKJSIm1LSgtrh4r/TABgZeEhH9/g4DnfaqJJOzY99aLSPY52hGnL/ +Hhrbqw9Ky8BE4O8KqPlXnQ658Bss2YMmB4DyWRXmKQ0h64JJUiEKossWy+1dKIFJ952 nHB3If2d7YVTinSbeivdxxQ11+vi92pdCtyW42YUxv7W1x3/jO8fKlfJv/3w2M9xKJ+I 4X2Q== X-Gm-Message-State: AJcUukeT6Zrhg05W04yYsfl2DZVBqcuT5wYopLkHagjIddbwHFQa2N0T jTUtaykOui2NZo3z6FvIk+J+KA== X-Google-Smtp-Source: ALg8bN7DUK6LyOrUOEcGJ7vtN8iZZyAFdTD0HIW3jW/LZF6c5e+10zrYeAmDej9RsedLjCe1N5g6fQ== X-Received: by 2002:a63:f717:: with SMTP id x23mr31147048pgh.317.1548927125228; Thu, 31 Jan 2019 01:32:05 -0800 (PST) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id w184sm4531197pgd.34.2019.01.31.01.32.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 31 Jan 2019 01:32:04 -0800 (PST) From: Pi-Hsun Shih Cc: Pi-Hsun Shih , Erin Lo , Ohad Ben-Cohen , Bjorn Andersson , Matthias Brugger , linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 6/6] remoteproc/mediatek: Load ELF instead of bin file for mtk_scp. Date: Thu, 31 Jan 2019 17:31:31 +0800 Message-Id: <20190131093131.245531-7-pihsun@chromium.org> X-Mailer: git-send-email 2.20.1.611.gfbb209baf1-goog In-Reply-To: <20190131093131.245531-1-pihsun@chromium.org> References: <20190131093131.245531-1-pihsun@chromium.org> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For better flexibility on loading firmware image, change firmware load for mtk_scp from a plain binary file to ELF format instead. Signed-off-by: Pi-Hsun Shih --- Changes from v3: - New patch to load ELF instead of plain bin file. --- drivers/remoteproc/mtk_common.h | 2 ++ drivers/remoteproc/mtk_scp.c | 59 ++++++++++++++++++++++++++++++-- drivers/remoteproc/mtk_scp_ipi.c | 11 ++++-- 3 files changed, 68 insertions(+), 4 deletions(-) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 7efe2e7374e5ec..dffca9fbea9f1e 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -73,4 +73,6 @@ struct share_obj { u8 share_buf[288]; }; +void scp_memcpy_aligned(void *dst, const void *src, unsigned int len); + #endif diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index c0375119c53289..314ae3f8a82cf7 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -140,6 +140,62 @@ static irqreturn_t scp_irq_handler(int irq, void *priv) return IRQ_HANDLED; } +int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw) +{ + struct device *dev = &rproc->dev; + struct elf32_hdr *ehdr; + struct elf32_phdr *phdr; + int i, ret = 0; + const u8 *elf_data = fw->data; + + ehdr = (struct elf32_hdr *)elf_data; + phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); + + /* go through the available ELF segments */ + for (i = 0; i < ehdr->e_phnum; i++, phdr++) { + u32 da = phdr->p_paddr; + u32 memsz = phdr->p_memsz; + u32 filesz = phdr->p_filesz; + u32 offset = phdr->p_offset; + void __iomem *ptr; + + if (phdr->p_type != PT_LOAD) + continue; + + dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", + phdr->p_type, da, memsz, filesz); + + if (filesz > memsz) { + dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", + filesz, memsz); + ret = -EINVAL; + break; + } + + if (offset + filesz > fw->size) { + dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", + offset + filesz, fw->size); + ret = -EINVAL; + break; + } + + /* grab the kernel address for this device address */ + ptr = rproc_da_to_va(rproc, da, memsz); + if (!ptr) { + dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); + ret = -EINVAL; + break; + } + + /* put the segment where the remote processor expects it */ + if (phdr->p_filesz) + scp_memcpy_aligned(ptr, elf_data + phdr->p_offset, + filesz); + } + + return ret; +} + static int mtk_scp_load(struct rproc *rproc, const struct firmware *fw) { const struct mtk_scp *scp = rproc->priv; @@ -157,8 +213,7 @@ static int mtk_scp_load(struct rproc *rproc, const struct firmware *fw) writel(0x0, scp->reg_base + MT8183_SCP_SRAM_PDN); - memcpy(scp->sram_base, fw->data, fw->size); - return ret; + return scp_elf_load_segments(rproc, fw); } static int mtk_scp_start(struct rproc *rproc) diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c index 1026089335a5c3..b6b248c9da50ac 100644 --- a/drivers/remoteproc/mtk_scp_ipi.c +++ b/drivers/remoteproc/mtk_scp_ipi.c @@ -55,7 +55,13 @@ void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id) } EXPORT_SYMBOL_GPL(scp_ipi_unregister); -static void memcpy_aligned(void *dst, const void *src, unsigned int len) +/* + * Copy src to dst, where dst is in SCP SRAM region. + * Since AP access of SCP SRAM don't support byte write, this always write a + * full word at a time, and may cause some extra bytes to be written at the + * beginning & ending of dst. + */ +void scp_memcpy_aligned(void *dst, const void *src, unsigned int len) { void *ptr; u32 val; @@ -80,6 +86,7 @@ static void memcpy_aligned(void *dst, const void *src, unsigned int len) writel_relaxed(val, dst + i); } } +EXPORT_SYMBOL_GPL(scp_memcpy_aligned); int scp_ipi_send(struct platform_device *pdev, enum scp_ipi_id id, @@ -117,7 +124,7 @@ int scp_ipi_send(struct platform_device *pdev, } } while (readl(scp->reg_base + MT8183_HOST_TO_SCP)); - memcpy_aligned(send_obj->share_buf, buf, len); + scp_memcpy_aligned(send_obj->share_buf, buf, len); send_obj->len = len; send_obj->id = id;