From 729b0c79c2c0f631bffe1be5abaf291febf7792f Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Thu, 11 Nov 2010 12:15:06 +0100 Subject: [PATCH] mmc: tmio_mmc: allow multi-element scatter-gather lists The driver is capable of handling multi-element sg lists in both PIO and DMA modes. In DMA mode this also allows to use the DMA sg capability more efficiently and almost doubles the throughput. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Chris Ball --- drivers/mmc/host/tmio_mmc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index e7765a89593e..4e75799291ca 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -864,10 +864,15 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev) goto host_free; mmc->ops = &tmio_mmc_ops; - mmc->caps = MMC_CAP_4_BIT_DATA; - mmc->caps |= pdata->capabilities; + mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities; mmc->f_max = pdata->hclk; mmc->f_min = mmc->f_max / 512; + mmc->max_segs = 32; + mmc->max_blk_size = 512; + mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) * + mmc->max_segs; + mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; + mmc->max_seg_size = mmc->max_req_size; if (pdata->ocr_mask) mmc->ocr_avail = pdata->ocr_mask; else -- 2.30.2