2016-03-30 11:57:55

by Jisheng Zhang

Subject: [PATCH] net: mvpp2: replace MVPP2_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES

The mvpp2 ip maybe used in SoCs which may have have 64bytes cacheline
size. Replace the MVPP2_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES.

And since dma_alloc_coherent() is always cacheline size aligned, so
remove the align checks.

Signed-off-by: Jisheng Zhang <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index c797971a..05f358b 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -321,7 +321,6 @@
/* Lbtd 802.3 type */
#define MVPP2_IP_LBDT_TYPE 0xfffa

-#define MVPP2_CPU_D_CACHE_LINE_SIZE 32
#define MVPP2_TX_CSUM_MAX_SIZE 9800

/* Timeout constants */
@@ -377,7 +376,7 @@

#define MVPP2_RX_PKT_SIZE(mtu) \
ALIGN((mtu) + MVPP2_MH_SIZE + MVPP2_VLAN_TAG_LEN + \
- ETH_HLEN + ETH_FCS_LEN, MVPP2_CPU_D_CACHE_LINE_SIZE)
+ ETH_HLEN + ETH_FCS_LEN, L1_CACHE_BYTES)

#define MVPP2_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD)
#define MVPP2_RX_TOTAL_SIZE(buf_size) ((buf_size) + MVPP2_SKB_SHINFO_SIZE)
@@ -4493,10 +4492,6 @@ static int mvpp2_aggr_txq_init(struct platform_device *pdev,
if (!aggr_txq->descs)
return -ENOMEM;

- /* Make sure descriptor address is cache line size aligned */
- BUG_ON(aggr_txq->descs !=
- PTR_ALIGN(aggr_txq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));
-
aggr_txq->last_desc = aggr_txq->size - 1;

/* Aggr TXQ no reset WA */
@@ -4526,9 +4521,6 @@ static int mvpp2_rxq_init(struct mvpp2_port *port,
if (!rxq->descs)
return -ENOMEM;

- BUG_ON(rxq->descs !=
- PTR_ALIGN(rxq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));
-
rxq->last_desc = rxq->size - 1;

/* Zero occupied and non-occupied counters - direct access */
@@ -4616,10 +4608,6 @@ static int mvpp2_txq_init(struct mvpp2_port *port,
if (!txq->descs)
return -ENOMEM;

- /* Make sure descriptor address is cache line size aligned */
- BUG_ON(txq->descs !=
- PTR_ALIGN(txq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));
-
txq->last_desc = txq->size - 1;

/* Set Tx descriptors queue starting address - indirect access */
--
2.8.0.rc3

2016-03-31 19:15:46

by David Miller

Subject: Re: [PATCH] net: mvpp2: replace MVPP2_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES

From: Jisheng Zhang <[email protected]>
Date: Wed, 30 Mar 2016 19:53:41 +0800

> The mvpp2 ip maybe used in SoCs which may have have 64bytes cacheline
> size. Replace the MVPP2_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES.
>
> And since dma_alloc_coherent() is always cacheline size aligned, so
> remove the align checks.
>
> Signed-off-by: Jisheng Zhang <[email protected]>

Applied.