From: Christoph Hellwig <hch@lst.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>,
Nicolas Pitre <nico@fluxnic.net>,
linux-mmc@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Ben Dooks <ben-linux@fluff.org>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH 05/14] mmc: moxart: handle highmem pages
Date: Tue, 12 Feb 2019 08:25:19 +0100 [thread overview]
Message-ID: <20190212072528.13167-6-hch@lst.de> (raw)
In-Reply-To: <20190212072528.13167-1-hch@lst.de>
Instead of setting up a kernel pointer to track the current PIO address,
track the offset in the current page, and do a kmap for the page while
doing the actual PIO operations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/mmc/host/moxart-mmc.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
index a0670e9cd012..116964e6506d 100644
--- a/drivers/mmc/host/moxart-mmc.c
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -311,7 +311,7 @@ static void moxart_transfer_pio(struct moxart_host *host)
if (host->data_len == data->bytes_xfered)
return;
- sgp = sg_virt(host->cur_sg);
+ sgp = kmap(sg_page(host->cur_sg)) + host->cur_sg->offset;
remain = host->data_remain;
if (data->flags & MMC_DATA_WRITE) {
@@ -319,8 +319,7 @@ static void moxart_transfer_pio(struct moxart_host *host)
if (moxart_wait_for_status(host, FIFO_URUN, &status)
== -ETIMEDOUT) {
data->error = -ETIMEDOUT;
- complete(&host->pio_complete);
- return;
+ goto done;
}
for (len = 0; len < remain && len < host->fifo_width;) {
iowrite32(*sgp, host->base + REG_DATA_WINDOW);
@@ -335,8 +334,7 @@ static void moxart_transfer_pio(struct moxart_host *host)
if (moxart_wait_for_status(host, FIFO_ORUN, &status)
== -ETIMEDOUT) {
data->error = -ETIMEDOUT;
- complete(&host->pio_complete);
- return;
+ goto done;
}
for (len = 0; len < remain && len < host->fifo_width;) {
/* SCR data must be read in big endian. */
@@ -356,10 +354,15 @@ static void moxart_transfer_pio(struct moxart_host *host)
data->bytes_xfered += host->data_remain - remain;
host->data_remain = remain;
- if (host->data_len != data->bytes_xfered)
+ if (host->data_len != data->bytes_xfered) {
+ kunmap(sg_page(host->cur_sg));
moxart_next_sg(host);
- else
- complete(&host->pio_complete);
+ return;
+ }
+
+done:
+ kunmap(sg_page(host->cur_sg));
+ complete(&host->pio_complete);
}
static void moxart_prepare_data(struct moxart_host *host)
@@ -614,6 +617,7 @@ static int moxart_probe(struct platform_device *pdev)
spin_lock_init(&host->lock);
mmc->ops = &moxart_ops;
+ mmc->need_kmap = 1;
mmc->f_max = DIV_ROUND_CLOSEST(host->sysclk, 2);
mmc->f_min = DIV_ROUND_CLOSEST(host->sysclk, CLK_DIV_MASK * 2);
mmc->ocr_avail = 0xffff00; /* Support 2.0v - 3.6v power. */
--
2.20.1
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next prev parent reply other threads:[~2019-02-12 7:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 7:25 remove block layer bounce buffering for MMC v2 Christoph Hellwig
2019-02-12 7:25 ` [PATCH 01/14] scatterlist: add sg_kmap_atomic / sg_kunmap_atomic helpers Christoph Hellwig
2019-02-12 7:25 ` [PATCH 02/14] mmc: remove the unused use_blk_mq field from struct mmc_host Christoph Hellwig
2019-02-12 7:25 ` [PATCH 03/14] mmc: add a need_kmap flag to " Christoph Hellwig
2019-02-12 7:25 ` [PATCH 04/14] mmc: davinci: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` Christoph Hellwig [this message]
2019-02-12 7:25 ` [PATCH 06/14] mmc: omap: " Christoph Hellwig
2019-02-12 18:39 ` Tony Lindgren
2019-02-12 7:25 ` [PATCH 07/14] mmc: omap: handle chained sglists Christoph Hellwig
2019-02-12 7:25 ` [PATCH 08/14] mmc: s3cmci: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` [PATCH 09/14] mmc: s3cmci: handle chained sglists Christoph Hellwig
2019-02-12 7:25 ` [PATCH 10/14] mmc: mvsdio: handle highmem pages Christoph Hellwig
2019-02-12 7:25 ` [PATCH 11/14] mmc: sh_mmcif: " Christoph Hellwig
2019-02-12 7:25 ` [PATCH 12/14] mmc: sh_mmcif: handle chained sglists Christoph Hellwig
2019-02-12 7:25 ` [PATCH 13/14] mmc: core: don't use block layer bounce buffers Christoph Hellwig
2019-02-12 7:25 ` [PATCH 14/14] dma-mapping: remove dma_max_pfn Christoph Hellwig
2019-02-25 13:54 ` remove block layer bounce buffering for MMC v2 Ulf Hansson
2019-03-08 9:18 ` Christoph Hellwig
2019-03-08 9:43 ` Ulf Hansson
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