diff options
| author | Michael Chan <mchan@broadcom.com> | 2005-07-25 21:31:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-07-25 21:31:17 +0200 |
| commit | 7e72aad48c3790636bfa006f3b0027852ccad47e (patch) | |
| tree | ba2f201b4554f95b3e432f75f6cc7a2cbb296f70 /drivers | |
| parent | [TG3]: add 5780 basic jumbo frame support (diff) | |
| download | linux-7e72aad48c3790636bfa006f3b0027852ccad47e.tar.xz linux-7e72aad48c3790636bfa006f3b0027852ccad47e.zip | |
[TG3]: add variable buffer size for standard ring
Add a new rx_pkt_buf_sz to the tg3 structure to support variable buffer
sizes on the standard ring.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tg3.c | 11 | ||||
| -rw-r--r-- | drivers/net/tg3.h | 2 |
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 9188a9b3ba2e..eca4b91454c0 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -2621,7 +2621,7 @@ static int tg3_alloc_rx_skb(struct tg3 *tp, u32 opaque_key, map = &tp->rx_std_buffers[dest_idx]; if (src_idx >= 0) src_map = &tp->rx_std_buffers[src_idx]; - skb_size = RX_PKT_BUF_SZ; + skb_size = tp->rx_pkt_buf_sz; break; case RXD_OPAQUE_RING_JUMBO: @@ -3500,7 +3500,7 @@ static void tg3_free_rings(struct tg3 *tp) continue; pci_unmap_single(tp->pdev, pci_unmap_addr(rxp, mapping), - RX_PKT_BUF_SZ - tp->rx_offset, + tp->rx_pkt_buf_sz - tp->rx_offset, PCI_DMA_FROMDEVICE); dev_kfree_skb_any(rxp->skb); rxp->skb = NULL; @@ -3573,6 +3573,11 @@ static void tg3_init_rings(struct tg3 *tp) memset(tp->rx_rcb, 0, TG3_RX_RCB_RING_BYTES(tp)); memset(tp->tx_ring, 0, TG3_TX_RING_BYTES); + tp->rx_pkt_buf_sz = RX_PKT_BUF_SZ; + if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780) && + (tp->dev->mtu > ETH_DATA_LEN)) + tp->rx_pkt_buf_sz = RX_JUMBO_PKT_BUF_SZ; + /* Initialize invariants of the rings, we only set this * stuff once. This works because the card does not * write into the rx buffer posting rings. @@ -3581,7 +3586,7 @@ static void tg3_init_rings(struct tg3 *tp) struct tg3_rx_buffer_desc *rxd; rxd = &tp->rx_std[i]; - rxd->idx_len = (RX_PKT_BUF_SZ - tp->rx_offset - 64) + rxd->idx_len = (tp->rx_pkt_buf_sz - tp->rx_offset - 64) << RXD_LEN_SHIFT; rxd->type_flags = (RXD_FLAG_END << RXD_FLAGS_SHIFT); rxd->opaque = (RXD_OPAQUE_RING_STD | diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 7cb2eefa7aad..15eb2bdb2de1 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -2088,6 +2088,8 @@ struct tg3 { struct tg3_rx_buffer_desc *rx_rcb; dma_addr_t rx_rcb_mapping; + u32 rx_pkt_buf_sz; + /* begin "everything else" cacheline(s) section */ struct net_device_stats net_stats; struct net_device_stats net_stats_prev; |