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[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>
This commit is contained in:
Michael Chan 2005-07-25 12:31:17 -07:00 committed by David S. Miller
parent 0f893dc6ec
commit 7e72aad48c
2 changed files with 10 additions and 3 deletions
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11
drivers/net/tg3.c
View File

@ -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 |

2
drivers/net/tg3.h
View File

@ -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;