From b4468cc6f2aeccaea74baa3b211a49851fd84158 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 7 Apr 2015 16:55:14 -0700 Subject: [PATCH] sungem, sunhme, sunvnet: Update drivers to use dma_wmb/rmb This patch goes through and replaces wmb/rmb with dma_wmb/dma_rmb in cases where the barrier is being used to order writes or reads to just memory and doesn't involve any programmed I/O. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- drivers/net/ethernet/sun/sungem.c | 14 +++++++------- drivers/net/ethernet/sun/sunhme.c | 16 ++++++++-------- drivers/net/ethernet/sun/sunvnet.c | 6 +++--- 3 files changed, 18 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c index 74e9b148378c..e23a642357e7 100644 --- a/drivers/net/ethernet/sun/sungem.c +++ b/drivers/net/ethernet/sun/sungem.c @@ -718,7 +718,7 @@ static __inline__ void gem_post_rxds(struct gem *gp, int limit) cluster_start = curr = (gp->rx_new & ~(4 - 1)); count = 0; kick = -1; - wmb(); + dma_wmb(); while (curr != limit) { curr = NEXT_RX(curr); if (++count == 4) { @@ -1038,7 +1038,7 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, if (gem_intme(entry)) ctrl |= TXDCTRL_INTME; txd->buffer = cpu_to_le64(mapping); - wmb(); + dma_wmb(); txd->control_word = cpu_to_le64(ctrl); entry = NEXT_TX(entry); } else { @@ -1076,7 +1076,7 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, txd = &gp->init_block->txd[entry]; txd->buffer = cpu_to_le64(mapping); - wmb(); + dma_wmb(); txd->control_word = cpu_to_le64(this_ctrl | len); if (gem_intme(entry)) @@ -1086,7 +1086,7 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, } txd = &gp->init_block->txd[first_entry]; txd->buffer = cpu_to_le64(first_mapping); - wmb(); + dma_wmb(); txd->control_word = cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len); } @@ -1585,7 +1585,7 @@ static void gem_clean_rings(struct gem *gp) gp->rx_skbs[i] = NULL; } rxd->status_word = 0; - wmb(); + dma_wmb(); rxd->buffer = 0; } @@ -1647,7 +1647,7 @@ static void gem_init_rings(struct gem *gp) RX_BUF_ALLOC_SIZE(gp), PCI_DMA_FROMDEVICE); rxd->buffer = cpu_to_le64(dma_addr); - wmb(); + dma_wmb(); rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); skb_reserve(skb, RX_OFFSET); } @@ -1656,7 +1656,7 @@ static void gem_init_rings(struct gem *gp) struct gem_txd *txd = &gb->txd[i]; txd->control_word = 0; - wmb(); + dma_wmb(); txd->buffer = 0; } wmb(); diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c index 7a8ca2c7b7df..cf4dcff051d5 100644 --- a/drivers/net/ethernet/sun/sunhme.c +++ b/drivers/net/ethernet/sun/sunhme.c @@ -196,14 +196,14 @@ static u32 sbus_hme_read32(void __iomem *reg) static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr) { rxd->rx_addr = (__force hme32)addr; - wmb(); + dma_wmb(); rxd->rx_flags = (__force hme32)flags; } static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr) { txd->tx_addr = (__force hme32)addr; - wmb(); + dma_wmb(); txd->tx_flags = (__force hme32)flags; } @@ -225,14 +225,14 @@ static u32 pci_hme_read32(void __iomem *reg) static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr) { rxd->rx_addr = (__force hme32)cpu_to_le32(addr); - wmb(); + dma_wmb(); rxd->rx_flags = (__force hme32)cpu_to_le32(flags); } static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr) { txd->tx_addr = (__force hme32)cpu_to_le32(addr); - wmb(); + dma_wmb(); txd->tx_flags = (__force hme32)cpu_to_le32(flags); } @@ -268,12 +268,12 @@ static u32 pci_hme_read_desc32(hme32 *p) sbus_readl(__reg) #define hme_write_rxd(__hp, __rxd, __flags, __addr) \ do { (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \ - wmb(); \ + dma_wmb(); \ (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \ } while(0) #define hme_write_txd(__hp, __txd, __flags, __addr) \ do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \ - wmb(); \ + dma_wmb(); \ (__txd)->tx_flags = (__force hme32)(u32)(__flags); \ } while(0) #define hme_read_desc32(__hp, __p) ((__force u32)(hme32)*(__p)) @@ -293,12 +293,12 @@ do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \ readl(__reg) #define hme_write_rxd(__hp, __rxd, __flags, __addr) \ do { (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \ - wmb(); \ + dma_wmb(); \ (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \ } while(0) #define hme_write_txd(__hp, __txd, __flags, __addr) \ do { (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \ - wmb(); \ + dma_wmb(); \ (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \ } while(0) static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p) diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 401abf7254d3..53fe200e0b79 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -519,7 +519,7 @@ static int vnet_walk_rx_one(struct vnet_port *port, if (desc->hdr.state != VIO_DESC_READY) return 1; - rmb(); + dma_rmb(); viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n", desc->hdr.state, desc->hdr.ack, @@ -1380,7 +1380,7 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev) /* This has to be a non-SMP write barrier because we are writing * to memory which is shared with the peer LDOM. */ - wmb(); + dma_wmb(); d->hdr.state = VIO_DESC_READY; @@ -1395,7 +1395,7 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev) * is marked READY, but start_cons was false. * If so, vnet_ack() should send out the missed "start" trigger. * - * Note that the wmb() above makes sure the cookies et al. are + * Note that the dma_wmb() above makes sure the cookies et al. are * not globally visible before the VIO_DESC_READY, and that the * stores are ordered correctly by the compiler. The consumer will * not proceed until the VIO_DESC_READY is visible assuring that -- 2.25.1