[PATCH 2/7] dmaengine: ste_dma40: use writel_relaxed for lcxa
From: Per Forlin
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
Reviewed-by: Narayanan Gopalakrishnan
Reviewed-by: Rabin Vincent
Acked-by: Linus Walleij
Signed-off-by: Fabio Baltieri
---
drivers/dma/ste_dma40_ll.c | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 536e848..c0781ae 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -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, [0].lcsp0);
- writel(lli_src->lcsp13, [0].lcsp1);
- writel(lli_dst->lcsp02, [0].lcsp2);
- writel(lli_dst->lcsp13, [0].lcsp3);
+ writel_relaxed(lli_src->lcsp02, [0].lcsp0);
+ writel_relaxed(lli_src->lcsp13, [0].lcsp1);
+ writel_relaxed(lli_dst->lcsp02, [0].lcsp2);
+ writel_relaxed(lli_dst->lcsp13, [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, [0].lcsp02);
- writel(lli_src->lcsp13, [0].lcsp13);
- writel(lli_dst->lcsp02, [1].lcsp02);
- writel(lli_dst->lcsp13, [1].lcsp13);
+ writel_relaxed(lli_src->lcsp02, [0].lcsp02);
+ writel_relaxed(lli_src->lcsp13, [0].lcsp13);
+ writel_relaxed(lli_dst->lcsp02, [1].lcsp02);
+ writel_relaxed(lli_dst->lcsp13, [1].lcsp13);
}
static void d40_log_fill_lli(struct d40_log_lli *lli,
--
1.7.12.1
--
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[PATCH 2/7] dmaengine: ste_dma40: use writel_relaxed for lcxa
From: Per Forlin per.for...@stericsson.com
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.for...@stericsson.com
Reviewed-by: Narayanan Gopalakrishnan narayanan.gopalakrish...@stericsson.com
Reviewed-by: Rabin Vincent rabin.vinc...@stericsson.com
Acked-by: Linus Walleij linus.wall...@linaro.org
Signed-off-by: Fabio Baltieri fabio.balti...@linaro.org
---
drivers/dma/ste_dma40_ll.c | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 536e848..c0781ae 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -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,
--
1.7.12.1
--
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