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core/linux-armv7 to 3.17.4-2
This commit is contained in:
Kevin Mihelich
parent
aa4b09218d
commit
2301ca81e0
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From 3c583f70a8e2feda03db77d2c8e9a41d302ac657 Mon Sep 17 00:00:00 2001
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From: Andrew Lunn <andrew@lunn.ch>
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Date: Wed, 12 Nov 2014 23:10:08 +0100
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Subject: [PATCH] mmc: mvsdio: Work around broken TX DMA
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In order to use the mvsdio driver for sdio, it has been necessary to
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use a module parameter to disable DMA so to force PIO is used. It is
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then possible to use wireless LAN devices like mwifiex found on
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topkick and mirabox. However, accessing an MMC SD card does work with
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DMA.
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Investigation has shown that MMC block device accesses are always
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aligned to 64 byte boundaries, where as transfers from mwifiex are
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rarely more than word aligned. It has also been determined that card
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to host transfers work with DMA for SDIO devices, but host to card
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transfers with DMA have problems.
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This patch extends the current checks for buffers which are not word
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aligned or multiple of words. All host to card transfers which are not
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64 byte aligned are now also performed via PIO. This should not affect
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the performance of SD cards, but allow sdio devices to work out of the
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box, and they are likely to be more efficient since DMA will be used
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for card to host transfers.
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Tested on mirabox for wifi via mwifiex
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Tested on 370 RD for file systems on an SD card.
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Signed-off-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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---
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drivers/mmc/host/mvsdio.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
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index 6b4c5ad..4f8618f 100644
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--- a/drivers/mmc/host/mvsdio.c
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+++ b/drivers/mmc/host/mvsdio.c
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@@ -111,10 +111,15 @@ static int mvsd_setup_data(struct mvsd_host *host, struct mmc_data *data)
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mvsd_write(MVSD_BLK_COUNT, data->blocks);
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mvsd_write(MVSD_BLK_SIZE, data->blksz);
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- if (nodma || (data->blksz | data->sg->offset) & 3) {
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+ if (nodma || (data->blksz | data->sg->offset) & 3 ||
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+ ((!(data->flags & MMC_DATA_READ) && data->sg->offset & 0x3f))) {
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/*
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* We cannot do DMA on a buffer which offset or size
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* is not aligned on a 4-byte boundary.
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+ *
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+ * It also appears the host to card DMA can corrupt
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+ * data when the buffer is not aligned on a 64 byte
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+ * boundary.
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*/
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host->pio_size = data->blocks * data->blksz;
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host->pio_ptr = sg_virt(data->sg);
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--
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2.1.3
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@ -8,7 +8,7 @@ _srcname=linux-3.17
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_kernelname=${pkgbase#linux}
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_desc="ARMv7 multi-platform"
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pkgver=3.17.4
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pkgrel=1
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pkgrel=2
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rcnrel=armv7-x3
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arch=('armv7h')
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url="http://www.kernel.org/"
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@ -24,6 +24,7 @@ source=("http://www.kernel.org/pub/linux/kernel/v3.x/${_srcname}.tar.xz"
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'0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch'
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'0003-SMILE-Plug-device-tree-file.patch'
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'0004-fix-mvsdio-eMMC-timing.patch'
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'0001-mmc-mvsdio-Work-around-broken-TX-DMA.patch'
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'config')
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md5sums=('fb30d0f29214d75cddd2faa94f73d5cf'
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'df86f9de60a651ce3312af09729f7b1e'
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@ -33,6 +34,7 @@ md5sums=('fb30d0f29214d75cddd2faa94f73d5cf'
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'1c1aa520091fcd25fa135582eddd0671'
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'cbfb644a50651ef450f9e35570da1b3f'
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'19330f72bf29ce5271f77d8bf769706f'
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'8470443040fce04fec4411aa7ddd9f51'
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'c5b8d7891b5625144bf24ef7d25e7627')
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prepare() {
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@ -49,6 +51,7 @@ prepare() {
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git apply ../0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch
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git apply ../0003-SMILE-Plug-device-tree-file.patch
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git apply ../0004-fix-mvsdio-eMMC-timing.patch
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git apply ../0001-mmc-mvsdio-Work-around-broken-TX-DMA.patch
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# AUFS patches
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cp -ru "${srcdir}/aufs3-standalone/Documentation" .
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@ -272,7 +275,7 @@ _package-headers() {
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_package-smileplug() {
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pkgdesc="The Linux Kernel - ${_desc} - Marvell SMILE Plug"
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depends=('linux-armv7')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-ax3')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-ax3' 'linux-armv7-d3plug' 'linux-armv7-cubox')
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replaces=('linux-mvebu-smileplug')
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cd "${srcdir}/${_srcname}"
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@ -285,7 +288,7 @@ _package-smileplug() {
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_package-mirabox() {
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pkgdesc="The Linux Kernel - ${_desc} - Globalscale Mirabox"
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depends=('linux-armv7')
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conflicts=('linux-armv7-smileplug' 'linux-armv7-ax3')
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conflicts=('linux-armv7-smileplug' 'linux-armv7-ax3' 'linux-armv7-d3plug' 'linux-armv7-cubox')
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replaces=('linux-mvebu-mirabox')
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cd "${srcdir}/${_srcname}"
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@ -298,7 +301,7 @@ _package-mirabox() {
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_package-ax3() {
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pkgdesc="The Linux Kernel - ${_desc} - OpenBlocks AX3-4"
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depends=('linux-armv7')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-smileplug')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-smileplug' 'linux-armv7-d3plug' 'linux-armv7-cubox')
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replaces=('linux-mvebu-ax3')
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cd "${srcdir}/${_srcname}"
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@ -308,7 +311,33 @@ _package-ax3() {
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "${pkgname}" -d myimage "${pkgdir}/boot/uImage"
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}
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pkgname=("${pkgbase}" "${pkgbase}-headers" "${pkgbase}-smileplug" "${pkgbase}-mirabox" "${pkgbase}-ax3")
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_package-d3plug() {
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pkgdesc="The Linux Kernel - ${_desc} - Globalscale D3Plug"
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depends=('linux-armv7')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-smileplug' 'linux-armv7-ax3' 'linux-armv7-cubox')
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#replaces=('linux-d3plug')
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cd "${srcdir}/${_srcname}"
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mkdir -p "${pkgdir}/boot"
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cat arch/$KARCH/boot/zImage arch/$KARCH/boot/dts/dove-d3plug.dtb > myimage
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "${pkgname}" -d myimage "${pkgdir}/boot/uImage"
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}
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_package-cubox() {
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pkgdesc="The Linux Kernel - ${_desc} - SolidRun Cubox (Marvell)"
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depends=('linux-armv7')
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conflicts=('linux-armv7-mirabox' 'linux-armv7-smileplug' 'linux-armv7-ax3' 'linux-armv7-d3plug')
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#replaces=('linux-cubox')
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cd "${srcdir}/${_srcname}"
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mkdir -p "${pkgdir}/boot"
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cat arch/$KARCH/boot/zImage arch/$KARCH/boot/dts/dove-cubox.dtb > myimage
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mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n "${pkgname}" -d myimage "${pkgdir}/boot/uImage"
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}
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pkgname=("${pkgbase}" "${pkgbase}-headers" "${pkgbase}-smileplug" "${pkgbase}-mirabox" "${pkgbase}-ax3" "${pkgbase}-d3plug" "${pkgbase}-cubox")
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for _p in ${pkgname[@]}; do
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eval "package_${_p}() {
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_package${_p#${pkgbase}}
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