* [PATCH] net: stmmac: Add GFP_DMA32 for rx buffers if no 64 capability
@ 2021-12-13 11:15 David Wu
2021-12-13 15:10 ` patchwork-bot+netdevbpf
0 siblings, 1 reply; 2+ messages in thread
From: David Wu @ 2021-12-13 11:15 UTC (permalink / raw)
To: joabreu, davem; +Cc: netdev, linux-kernel, David Wu
Use page_pool_alloc_pages instead of page_pool_dev_alloc_pages, which
can give the gfp parameter, in the case of not supporting 64-bit width,
using 32-bit address memory can reduce a copy from swiotlb.
Signed-off-by: David Wu <david.wu@rock-chips.com>
---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index da8306f60730..8ded4be08b00 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1461,16 +1461,20 @@ static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
+ gfp_t gfp = (GFP_ATOMIC | __GFP_NOWARN);
+
+ if (priv->dma_cap.addr64 <= 32)
+ gfp |= GFP_DMA32;
if (!buf->page) {
- buf->page = page_pool_dev_alloc_pages(rx_q->page_pool);
+ buf->page = page_pool_alloc_pages(rx_q->page_pool, gfp);
if (!buf->page)
return -ENOMEM;
buf->page_offset = stmmac_rx_offset(priv);
}
if (priv->sph && !buf->sec_page) {
- buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool);
+ buf->sec_page = page_pool_alloc_pages(rx_q->page_pool, gfp);
if (!buf->sec_page)
return -ENOMEM;
@@ -4482,6 +4486,10 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
int dirty = stmmac_rx_dirty(priv, queue);
unsigned int entry = rx_q->dirty_rx;
+ gfp_t gfp = (GFP_ATOMIC | __GFP_NOWARN);
+
+ if (priv->dma_cap.addr64 <= 32)
+ gfp |= GFP_DMA32;
while (dirty-- > 0) {
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[entry];
@@ -4494,13 +4502,13 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
p = rx_q->dma_rx + entry;
if (!buf->page) {
- buf->page = page_pool_dev_alloc_pages(rx_q->page_pool);
+ buf->page = page_pool_alloc_pages(rx_q->page_pool, gfp);
if (!buf->page)
break;
}
if (priv->sph && !buf->sec_page) {
- buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool);
+ buf->sec_page = page_pool_alloc_pages(rx_q->page_pool, gfp);
if (!buf->sec_page)
break;
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] net: stmmac: Add GFP_DMA32 for rx buffers if no 64 capability
2021-12-13 11:15 [PATCH] net: stmmac: Add GFP_DMA32 for rx buffers if no 64 capability David Wu
@ 2021-12-13 15:10 ` patchwork-bot+netdevbpf
0 siblings, 0 replies; 2+ messages in thread
From: patchwork-bot+netdevbpf @ 2021-12-13 15:10 UTC (permalink / raw)
To: David Wu; +Cc: joabreu, davem, netdev, linux-kernel
Hello:
This patch was applied to netdev/net.git (master)
by David S. Miller <davem@davemloft.net>:
On Mon, 13 Dec 2021 19:15:15 +0800 you wrote:
> Use page_pool_alloc_pages instead of page_pool_dev_alloc_pages, which
> can give the gfp parameter, in the case of not supporting 64-bit width,
> using 32-bit address memory can reduce a copy from swiotlb.
>
> Signed-off-by: David Wu <david.wu@rock-chips.com>
> ---
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 16 ++++++++++++----
> 1 file changed, 12 insertions(+), 4 deletions(-)
Here is the summary with links:
- net: stmmac: Add GFP_DMA32 for rx buffers if no 64 capability
https://git.kernel.org/netdev/net/c/884d2b845477
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
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2021-12-13 15:10 ` patchwork-bot+netdevbpf
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