From patchwork Tue Feb 12 07:25:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10807451 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 3E4F814E1 for ; Tue, 12 Feb 2019 07:26:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 27C862915C for ; Tue, 12 Feb 2019 07:26:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1BCA32A3CA; Tue, 12 Feb 2019 07:26:43 +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=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 930862915C for ; Tue, 12 Feb 2019 07:26:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728292AbfBLH0O (ORCPT ); Tue, 12 Feb 2019 02:26:14 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:59874 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728284AbfBLH0N (ORCPT ); Tue, 12 Feb 2019 02:26:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=z2lTeBYlifNP2/9UvuiZxj60a5rzZPCVg1buSdgpIn4=; b=n0c2VdRv3X9nsqqigP7saoTuPQ cd54bgGBZk3FatXrHrTu0iZZBEF4CMlsHulArlfSub8wniVmU08nA5vdYjWdSGKUggRiM5tLXFzFi Pg6YTTePl87DiJmD6AaNt2AEyh4P/ToLncEVq9xbJm6MWw6lepm943kfFu1w4wqhRNqca8r7bzABa GtlBjwaDuBPJCbzgCExjXHp3WftzJFknflql2aDydnIFA0yCyJkbhABure5UY+thuecSO+T99hT7E KWb7ovbRzK10B3jByXhCMLSPK4LmOZOCygC/HvhJfe+WUIA0QSHfQrMO7GtK4iYngP2su6Bm1GiFR KGOaZHFw==; Received: from 089144210182.atnat0019.highway.a1.net ([89.144.210.182] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtSS8-0002oX-QN; Tue, 12 Feb 2019 07:26:01 +0000 From: Christoph Hellwig To: Ulf Hansson Cc: Russell King , Nicolas Pitre , Aaro Koskinen , Ben Dooks , linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH 11/14] mmc: sh_mmcif: handle highmem pages Date: Tue, 12 Feb 2019 08:25:25 +0100 Message-Id: <20190212072528.13167-12-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190212072528.13167-1-hch@lst.de> References: <20190212072528.13167-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Instead of setting up a kernel pointer to track the current PIO address, track the offset in the current page, and do an atomic kmap for the page while doing the actual PIO operations. Signed-off-by: Christoph Hellwig --- drivers/mmc/host/sh_mmcif.c | 59 +++++++++++++++++++++++-------------- 1 file changed, 37 insertions(+), 22 deletions(-) diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 81bd9afb0980..24c3f13bafdb 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -228,7 +228,7 @@ struct sh_mmcif_host { bool dying; long timeout; void __iomem *addr; - u32 *pio_ptr; + u32 pio_offset; spinlock_t lock; /* protect sh_mmcif_host::state */ enum sh_mmcif_state state; enum sh_mmcif_wait_for wait_for; @@ -595,7 +595,7 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host) return ret; } -static bool sh_mmcif_next_block(struct sh_mmcif_host *host, u32 *p) +static bool sh_mmcif_next_block(struct sh_mmcif_host *host) { struct mmc_data *data = host->mrq->data; @@ -606,10 +606,10 @@ static bool sh_mmcif_next_block(struct sh_mmcif_host *host, u32 *p) if (host->sg_blkidx == data->sg->length) { host->sg_blkidx = 0; - if (++host->sg_idx < data->sg_len) - host->pio_ptr = sg_virt(++data->sg); - } else { - host->pio_ptr = p; + if (++host->sg_idx < data->sg_len) { + data->sg++; + host->pio_offset = data->sg->offset / 4; + } } return host->sg_idx != data->sg_len; @@ -631,8 +631,8 @@ static bool sh_mmcif_read_block(struct sh_mmcif_host *host) { struct device *dev = sh_mmcif_host_to_dev(host); struct mmc_data *data = host->mrq->data; - u32 *p = sg_virt(data->sg); - int i; + u32 *p; + int off, i; if (host->sd_error) { data->error = sh_mmcif_error_manage(host); @@ -640,8 +640,11 @@ static bool sh_mmcif_read_block(struct sh_mmcif_host *host) return false; } + p = sg_kmap_atomic(data->sg); + off = data->sg->offset / 4; for (i = 0; i < host->blocksize / 4; i++) - *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); + p[off++] = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); + sg_kunmap_atomic(data->sg, p); /* buffer read end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); @@ -664,7 +667,7 @@ static void sh_mmcif_multi_read(struct sh_mmcif_host *host, host->wait_for = MMCIF_WAIT_FOR_MREAD; host->sg_idx = 0; host->sg_blkidx = 0; - host->pio_ptr = sg_virt(data->sg); + host->pio_offset = data->sg->offset / 4; sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); } @@ -673,7 +676,7 @@ static bool sh_mmcif_mread_block(struct sh_mmcif_host *host) { struct device *dev = sh_mmcif_host_to_dev(host); struct mmc_data *data = host->mrq->data; - u32 *p = host->pio_ptr; + u32 *p; int i; if (host->sd_error) { @@ -684,10 +687,14 @@ static bool sh_mmcif_mread_block(struct sh_mmcif_host *host) BUG_ON(!data->sg->length); - for (i = 0; i < host->blocksize / 4; i++) - *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); + p = sg_kmap_atomic(data->sg); + for (i = 0; i < host->blocksize / 4; i++) { + p[host->pio_offset++] = + sh_mmcif_readl(host->addr, MMCIF_CE_DATA); + } + sg_kunmap_atomic(data->sg, p); - if (!sh_mmcif_next_block(host, p)) + if (!sh_mmcif_next_block(host)) return false; sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); @@ -711,8 +718,8 @@ static bool sh_mmcif_write_block(struct sh_mmcif_host *host) { struct device *dev = sh_mmcif_host_to_dev(host); struct mmc_data *data = host->mrq->data; - u32 *p = sg_virt(data->sg); - int i; + u32 *p; + int off, i; if (host->sd_error) { data->error = sh_mmcif_error_manage(host); @@ -720,8 +727,11 @@ static bool sh_mmcif_write_block(struct sh_mmcif_host *host) return false; } + p = sg_kmap_atomic(data->sg); + off = data->sg->offset / 4; for (i = 0; i < host->blocksize / 4; i++) - sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); + sh_mmcif_writel(host->addr, MMCIF_CE_DATA, p[off++]); + sg_kunmap_atomic(data->sg, p); /* buffer write end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); @@ -744,7 +754,7 @@ static void sh_mmcif_multi_write(struct sh_mmcif_host *host, host->wait_for = MMCIF_WAIT_FOR_MWRITE; host->sg_idx = 0; host->sg_blkidx = 0; - host->pio_ptr = sg_virt(data->sg); + host->pio_offset = data->sg->offset / 4; sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); } @@ -753,7 +763,7 @@ static bool sh_mmcif_mwrite_block(struct sh_mmcif_host *host) { struct device *dev = sh_mmcif_host_to_dev(host); struct mmc_data *data = host->mrq->data; - u32 *p = host->pio_ptr; + u32 *p; int i; if (host->sd_error) { @@ -764,10 +774,14 @@ static bool sh_mmcif_mwrite_block(struct sh_mmcif_host *host) BUG_ON(!data->sg->length); - for (i = 0; i < host->blocksize / 4; i++) - sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); + p = sg_kmap_atomic(data->sg); + for (i = 0; i < host->blocksize / 4; i++) { + sh_mmcif_writel(host->addr, MMCIF_CE_DATA, + p[host->pio_offset++]); + } + sg_kunmap_atomic(data->sg, p); - if (!sh_mmcif_next_block(host, p)) + if (!sh_mmcif_next_block(host)) return false; sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); @@ -1424,6 +1438,7 @@ static int sh_mmcif_probe(struct platform_device *pdev) spin_lock_init(&host->lock); mmc->ops = &sh_mmcif_ops; + mmc->need_kmap = 1; sh_mmcif_init_ocr(host); mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_WAIT_WHILE_BUSY;