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mmc: tmio_mmc: allow multi-element scatter-gather lists

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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 <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski
2010-11-11 12:15:06 +01:00
committed by Chris Ball
parent 1a2727e987
commit 729b0c79c2
1 changed files with 7 additions and 2 deletions
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9
drivers/mmc/host/tmio_mmc.c
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@@ -864,10 +864,15 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
goto host_free; goto host_free;
mmc->ops = &tmio_mmc_ops; mmc->ops = &tmio_mmc_ops;
mmc->caps = MMC_CAP_4_BIT_DATA; mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities;
mmc->caps |= pdata->capabilities;
mmc->f_max = pdata->hclk; mmc->f_max = pdata->hclk;
mmc->f_min = mmc->f_max / 512; 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) if (pdata->ocr_mask)
mmc->ocr_avail = pdata->ocr_mask; mmc->ocr_avail = pdata->ocr_mask;
else else