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dmaengine: ste_dma40: use writel_relaxed for lcxa 

lcpa and lcla are written often and the cache_sync() overhead in writel
is costly, especially for wlan where every single network packet (in RX
mode) corresponds to a separate DMA transfer.

Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Reviewed-by: Narayanan Gopalakrishnan <narayanan.gopalakrishnan@stericsson.com>
Reviewed-by: Rabin Vincent <rabin.vincent@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
This commit is contained in:
Per Forlin 2011-09-28 09:32:20 +02:00 committed by Fabio Baltieri
parent 0fd602235d
commit 8a5d2039ab
1 changed files with 8 additions and 8 deletions
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16
drivers/dma/ste_dma40_ll.c
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@ -332,10 +332,10 @@ void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
{
d40_log_lli_link(lli_dst, lli_src, next, flags);
writel(lli_src->lcsp02, &lcpa[0].lcsp0);
writel(lli_src->lcsp13, &lcpa[0].lcsp1);
writel(lli_dst->lcsp02, &lcpa[0].lcsp2);
writel(lli_dst->lcsp13, &lcpa[0].lcsp3);
writel_relaxed(lli_src->lcsp02, &lcpa[0].lcsp0);
writel_relaxed(lli_src->lcsp13, &lcpa[0].lcsp1);
writel_relaxed(lli_dst->lcsp02, &lcpa[0].lcsp2);
writel_relaxed(lli_dst->lcsp13, &lcpa[0].lcsp3);
}
void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
@ -345,10 +345,10 @@ void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
{
d40_log_lli_link(lli_dst, lli_src, next, flags);
writel(lli_src->lcsp02, &lcla[0].lcsp02);
writel(lli_src->lcsp13, &lcla[0].lcsp13);
writel(lli_dst->lcsp02, &lcla[1].lcsp02);
writel(lli_dst->lcsp13, &lcla[1].lcsp13);
writel_relaxed(lli_src->lcsp02, &lcla[0].lcsp02);
writel_relaxed(lli_src->lcsp13, &lcla[0].lcsp13);
writel_relaxed(lli_dst->lcsp02, &lcla[1].lcsp02);
writel_relaxed(lli_dst->lcsp13, &lcla[1].lcsp13);
}
static void d40_log_fill_lli(struct d40_log_lli *lli,