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path: root/drivers/net/pasemi_mac.c
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Diffstat (limited to 'drivers/net/pasemi_mac.c')
-rw-r--r--drivers/net/pasemi_mac.c60
1 files changed, 33 insertions, 27 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 967ff8c96b0..31ad2b9093a 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -243,9 +243,9 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
- PAS_DMA_RXINT_CFG_DHL(3) |
- PAS_DMA_RXINT_CFG_L2 |
- PAS_DMA_RXINT_CFG_LW);
+ PAS_DMA_RXINT_CFG_DHL(3) | PAS_DMA_RXINT_CFG_L2 |
+ PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
+ PAS_DMA_RXINT_CFG_HEN);
ring->next_to_fill = 0;
ring->next_to_clean = 0;
@@ -402,13 +402,12 @@ static void pasemi_mac_free_rx_resources(struct net_device *dev)
static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
{
struct pasemi_mac *mac = netdev_priv(dev);
- int start = mac->rx->next_to_fill;
- unsigned int fill, count;
+ int fill, count;
if (limit <= 0)
return;
- fill = start;
+ fill = mac->rx->next_to_fill;
for (count = 0; count < limit; count++) {
struct pasemi_mac_buffer *info = &RX_RING_INFO(mac, fill);
u64 *buff = &RX_BUFF(mac, fill);
@@ -446,10 +445,10 @@ static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
wmb();
- write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count);
write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
- mac->rx->next_to_fill += count;
+ mac->rx->next_to_fill = (mac->rx->next_to_fill + count) &
+ (RX_RING_SIZE - 1);
}
static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
@@ -517,15 +516,19 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
int count;
struct pasemi_mac_buffer *info;
struct sk_buff *skb;
- unsigned int i, len;
+ unsigned int len;
u64 macrx;
dma_addr_t dma;
+ int buf_index;
+ u64 eval;
spin_lock(&mac->rx->lock);
n = mac->rx->next_to_clean;
- for (count = limit; count; count--) {
+ prefetch(RX_RING(mac, n));
+
+ for (count = 0; count < limit; count++) {
macrx = RX_RING(mac, n);
if ((macrx & XCT_MACRX_E) ||
@@ -537,21 +540,14 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
info = NULL;
- /* We have to scan for our skb since there's no way
- * to back-map them from the descriptor, and if we
- * have several receive channels then they might not
- * show up in the same order as they were put on the
- * interface ring.
- */
+ BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
- dma = (RX_RING(mac, n+1) & XCT_PTR_ADDR_M);
- for (i = mac->rx->next_to_fill;
- i < (mac->rx->next_to_fill + RX_RING_SIZE);
- i++) {
- info = &RX_RING_INFO(mac, i);
- if (info->dma == dma)
- break;
- }
+ eval = (RX_RING(mac, n+1) & XCT_RXRES_8B_EVAL_M) >>
+ XCT_RXRES_8B_EVAL_S;
+ buf_index = eval-1;
+
+ dma = (RX_RING(mac, n+2) & XCT_PTR_ADDR_M);
+ info = &RX_RING_INFO(mac, buf_index);
skb = info->skb;
@@ -600,9 +596,9 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
/* Need to zero it out since hardware doesn't, since the
* replenish loop uses it to tell when it's done.
*/
- RX_BUFF(mac, i) = 0;
+ RX_BUFF(mac, buf_index) = 0;
- n += 2;
+ n += 4;
}
if (n > RX_RING_SIZE) {
@@ -610,8 +606,16 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
write_iob_reg(mac, PAS_IOB_COM_PKTHDRCNT, 0);
n &= (RX_RING_SIZE-1);
}
+
mac->rx->next_to_clean = n;
- pasemi_mac_replenish_rx_ring(mac->netdev, limit-count);
+
+ /* Increase is in number of 16-byte entries, and since each descriptor
+ * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
+ * count*2.
+ */
+ write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count << 1);
+
+ pasemi_mac_replenish_rx_ring(mac->netdev, count);
spin_unlock(&mac->rx->lock);
@@ -927,6 +931,8 @@ static int pasemi_mac_open(struct net_device *dev)
pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
+ write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), RX_RING_SIZE>>1);
+
flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;