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Date: Mon, 17 Oct 2011 14:59:28 +0200 (CEST)
From: Guennadi Liakhovetski <g.liakhovetski@....de>
To: Vinod Koul <vinod.koul@...el.com>
cc: dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
jaswinder.singh@...aro.org, 21cnbao@...il.com,
rmk@....linux.org.uk, Vinod Koul <vinod.koul@...ux.intel.com>,
Nicolas Ferre <nicolas.ferre@...el.com>,
Chris Ball <cjb@...top.org>
Subject: Re: [PATCH 06/10] mmc-host: move to dma_transfer_direction
On Fri, 14 Oct 2011, Vinod Koul wrote:
> From: Vinod Koul <vinod.koul@...ux.intel.com>
>
> Signed-off-by: Vinod Koul <vinod.koul@...ux.intel.com>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Cc: Chris Ball <cjb@...top.org>
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
For sh_mmcifsh_mmcif and tmio_mmc_dma:
Acked-by: Guennadi Liakhovetski <g.liakhovetski@....de>
(of course, the macro naming comment still holds)
Thanks
Guennadi
> ---
> drivers/mmc/host/atmel-mci.c | 9 ++++++---
> drivers/mmc/host/mmci.c | 11 +++++++----
> drivers/mmc/host/mxcmmc.c | 10 +++++++---
> drivers/mmc/host/mxs-mmc.c | 7 ++++++-
> drivers/mmc/host/sh_mmcif.c | 4 ++--
> drivers/mmc/host/tmio_mmc_dma.c | 4 ++--
> 6 files changed, 30 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index fa8cae1..7c9d28a 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -681,16 +681,19 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
> if (atmci_is_mci2())
> mci_writel(host, DMA, MCI_DMA_CHKSIZE(3) | MCI_DMAEN);
>
> - if (data->flags & MMC_DATA_READ)
> + if (data->flags & MMC_DATA_READ) {
> direction = DMA_FROM_DEVICE;
> - else
> + slave_dirn = DEV_TO_MEM;
> + } else {
> direction = DMA_TO_DEVICE;
> + slave_dirn = MEM_TO_DEV;
> + }
>
> sglen = dma_map_sg(chan->device->dev, data->sg,
> data->sg_len, direction);
>
> desc = chan->device->device_prep_slave_sg(chan,
> - data->sg, sglen, direction,
> + data->sg, sglen, slave_dirn,
> DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
> if (!desc)
> goto unmap_exit;
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 56e9a41..efbc743 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -372,6 +372,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
> struct dma_chan *chan;
> struct dma_device *device;
> struct dma_async_tx_descriptor *desc;
> + enum dma_data_direction buffer_dirn;
> int nr_sg;
>
> /* Check if next job is already prepared */
> @@ -385,10 +386,12 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
> }
>
> if (data->flags & MMC_DATA_READ) {
> - conf.direction = DMA_FROM_DEVICE;
> + conf.direction = DEV_TO_MEM;
> + buffer_dirn = DMA_FROM_DEVICE;
> chan = host->dma_rx_channel;
> } else {
> - conf.direction = DMA_TO_DEVICE;
> + conf.direction = MEM_TO_DEV;
> + buffer_dirn = DMA_TO_DEVICE;
> chan = host->dma_tx_channel;
> }
>
> @@ -401,7 +404,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
> return -EINVAL;
>
> device = chan->device;
> - nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, conf.direction);
> + nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
> if (nr_sg == 0)
> return -EINVAL;
>
> @@ -424,7 +427,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
> unmap_exit:
> if (!next)
> dmaengine_terminate_all(chan);
> - dma_unmap_sg(device->dev, data->sg, data->sg_len, conf.direction);
> + dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
> return -ENOMEM;
> }
>
> diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
> index 14aa213..4115108 100644
> --- a/drivers/mmc/host/mxcmmc.c
> +++ b/drivers/mmc/host/mxcmmc.c
> @@ -217,6 +217,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
> unsigned int blksz = data->blksz;
> unsigned int datasize = nob * blksz;
> struct scatterlist *sg;
> + enum dma_transfer_direction slave_dirn;
> int i, nents;
>
> if (data->flags & MMC_DATA_STREAM)
> @@ -239,10 +240,13 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
> }
> }
>
> - if (data->flags & MMC_DATA_READ)
> + if (data->flags & MMC_DATA_READ) {
> host->dma_dir = DMA_FROM_DEVICE;
> - else
> + slave_dirn = DEV_TO_MEM;
> + } else {
> host->dma_dir = DMA_TO_DEVICE;
> + slave_dirn = MEM_TO_DEV;
> + }
>
> nents = dma_map_sg(host->dma->device->dev, data->sg,
> data->sg_len, host->dma_dir);
> @@ -250,7 +254,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
> return -EINVAL;
>
> host->desc = host->dma->device->device_prep_slave_sg(host->dma,
> - data->sg, data->sg_len, host->dma_dir,
> + data->sg, data->sg_len, slave_dirn,
> DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
>
> if (!host->desc) {
> diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
> index d513d47..c0a3def 100644
> --- a/drivers/mmc/host/mxs-mmc.c
> +++ b/drivers/mmc/host/mxs-mmc.c
> @@ -153,6 +153,7 @@ struct mxs_mmc_host {
> struct dma_chan *dmach;
> struct mxs_dma_data dma_data;
> unsigned int dma_dir;
> + enum dma_transfer_direction slave_dirn;
> u32 ssp_pio_words[SSP_PIO_NUM];
>
> unsigned int version;
> @@ -323,7 +324,7 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
> }
>
> desc = host->dmach->device->device_prep_slave_sg(host->dmach,
> - sgl, sg_len, host->dma_dir, append);
> + sgl, sg_len, host->slave_dirn, append);
> if (desc) {
> desc->callback = mxs_mmc_dma_irq_callback;
> desc->callback_param = host;
> @@ -432,6 +433,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
> int i;
>
> unsigned short dma_data_dir, timeout;
> + enum dma_transfer_direction slave_dirn;
> unsigned int data_size = 0, log2_blksz;
> unsigned int blocks = data->blocks;
>
> @@ -447,9 +449,11 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
>
> if (data->flags & MMC_DATA_WRITE) {
> dma_data_dir = DMA_TO_DEVICE;
> + slave_dirn = MEM_TO_DEV;
> read = 0;
> } else {
> dma_data_dir = DMA_FROM_DEVICE;
> + slave_dirn = DEV_TO_MEM;
> read = BM_SSP_CTRL0_READ;
> }
>
> @@ -517,6 +521,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
> WARN_ON(host->data != NULL);
> host->data = data;
> host->dma_dir = dma_data_dir;
> + host->slave_dirn = slave_dirn;
> desc = mxs_mmc_prep_dma(host, 1);
> if (!desc)
> goto out;
> diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
> index 557886b..7a374c9 100644
> --- a/drivers/mmc/host/sh_mmcif.c
> +++ b/drivers/mmc/host/sh_mmcif.c
> @@ -230,7 +230,7 @@ static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
> if (ret > 0) {
> host->dma_active = true;
> desc = chan->device->device_prep_slave_sg(chan, sg, ret,
> - DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
> + DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
> }
>
> if (desc) {
> @@ -278,7 +278,7 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
> if (ret > 0) {
> host->dma_active = true;
> desc = chan->device->device_prep_slave_sg(chan, sg, ret,
> - DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
> + MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
> }
>
> if (desc) {
> diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
> index 86f259c..663624c 100644
> --- a/drivers/mmc/host/tmio_mmc_dma.c
> +++ b/drivers/mmc/host/tmio_mmc_dma.c
> @@ -77,7 +77,7 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
> ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
> if (ret > 0)
> desc = chan->device->device_prep_slave_sg(chan, sg, ret,
> - DMA_FROM_DEVICE, DMA_CTRL_ACK);
> + DEV_TO_MEM, DMA_CTRL_ACK);
>
> if (desc) {
> cookie = dmaengine_submit(desc);
> @@ -158,7 +158,7 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
> ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
> if (ret > 0)
> desc = chan->device->device_prep_slave_sg(chan, sg, ret,
> - DMA_TO_DEVICE, DMA_CTRL_ACK);
> + MEM_TO_DEV, DMA_CTRL_ACK);
>
> if (desc) {
> cookie = dmaengine_submit(desc);
> --
> 1.7.0.4
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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