diff options
| author | Florian Fainelli <f.fainelli@gmail.com> | 2015-05-28 15:24:42 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-30 23:51:09 -0700 |
| commit | baf387a8edaa4a55afeaf4f498d3891ddcb03fb7 (patch) | |
| tree | 004fa2cfa90e25253e0f0a9986bb049820137ed0 | |
| parent | 3d2f6d41d1588c975d16c5969726d018bba90794 (diff) | |
| download | linux-baf387a8edaa4a55afeaf4f498d3891ddcb03fb7.tar.bz2 | |
net: systemport: Pre-calculate and utilize cb->bd_addr
There is a 1:1 mapping between the software maintained control block in
priv->rx_cbs and the buffer address in priv->rx_bds, such that there is
no need to keep computing the buffer address when refiling a control
block.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/broadcom/bcmsysport.c | 18 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/bcmsysport.h | 2 |
2 files changed, 9 insertions, 11 deletions
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c index 084a50a555de..267330ccd595 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -549,12 +549,7 @@ static int bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, } dma_unmap_addr_set(cb, dma_addr, mapping); - dma_desc_set_addr(priv, priv->rx_bd_assign_ptr, mapping); - - priv->rx_bd_assign_index++; - priv->rx_bd_assign_index &= (priv->num_rx_bds - 1); - priv->rx_bd_assign_ptr = priv->rx_bds + - (priv->rx_bd_assign_index * DESC_SIZE); + dma_desc_set_addr(priv, cb->bd_addr, mapping); netif_dbg(priv, rx_status, ndev, "RX refill\n"); @@ -568,7 +563,7 @@ static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) unsigned int i; for (i = 0; i < priv->num_rx_bds; i++) { - cb = &priv->rx_cbs[priv->rx_bd_assign_index]; + cb = &priv->rx_cbs[i]; if (cb->skb) continue; @@ -1330,14 +1325,14 @@ static inline int tdma_enable_set(struct bcm_sysport_priv *priv, static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) { + struct bcm_sysport_cb *cb; u32 reg; int ret; + int i; /* Initialize SW view of the RX ring */ priv->num_rx_bds = NUM_RX_DESC; priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; - priv->rx_bd_assign_ptr = priv->rx_bds; - priv->rx_bd_assign_index = 0; priv->rx_c_index = 0; priv->rx_read_ptr = 0; priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb), @@ -1347,6 +1342,11 @@ static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) return -ENOMEM; } + for (i = 0; i < priv->num_rx_bds; i++) { + cb = priv->rx_cbs + i; + cb->bd_addr = priv->rx_bds + i * DESC_SIZE; + } + ret = bcm_sysport_alloc_rx_bufs(priv); if (ret) { netif_err(priv, hw, priv->netdev, "SKB allocation failed\n"); diff --git a/drivers/net/ethernet/broadcom/bcmsysport.h b/drivers/net/ethernet/broadcom/bcmsysport.h index 42a4b4a0bc14..f28bf545d7f4 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.h +++ b/drivers/net/ethernet/broadcom/bcmsysport.h @@ -663,8 +663,6 @@ struct bcm_sysport_priv { /* Receive queue */ void __iomem *rx_bds; - void __iomem *rx_bd_assign_ptr; - unsigned int rx_bd_assign_index; struct bcm_sysport_cb *rx_cbs; unsigned int num_rx_bds; unsigned int rx_read_ptr; |