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net: fec: Increase buffer descriptor entry number

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In order to support SG, software TSO, let's increase BD entry number.

CC: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nimrod Andy 2014-06-12 08:16:21 +08:00 committed by David S. Miller
parent 09d1e541fd
commit 55d0218ae2
2 changed files with 17 additions and 16 deletions
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4
drivers/net/ethernet/freescale/fec.h
View File

@ -246,8 +246,8 @@ struct bufdesc_ex {
#define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
#define FEC_ENET_TX_FRSIZE 2048
#define FEC_ENET_TX_FRPPG (PAGE_SIZE / FEC_ENET_TX_FRSIZE)
#define TX_RING_SIZE 16 /* Must be power of two */
#define TX_RING_MOD_MASK 15 /* for this to work */
#define TX_RING_SIZE 512 /* Must be power of two */
#define TX_RING_MOD_MASK 511 /* for this to work */
#define BD_ENET_RX_INT 0x00800000
#define BD_ENET_RX_PTP ((ushort)0x0400)

29
drivers/net/ethernet/freescale/fec_main.c
View File

@ -173,10 +173,6 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
#endif
#endif /* CONFIG_M5272 */
#if (((RX_RING_SIZE + TX_RING_SIZE) * 32) > PAGE_SIZE)
#error "FEC: descriptor ring size constants too large"
#endif
/* Interrupt events/masks. */
#define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
#define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
@ -2048,9 +2044,21 @@ static int fec_enet_init(struct net_device *ndev)
const struct platform_device_id *id_entry =
platform_get_device_id(fep->pdev);
struct bufdesc *cbd_base;
int bd_size;
/* init the tx & rx ring size */
fep->tx_ring_size = TX_RING_SIZE;
fep->rx_ring_size = RX_RING_SIZE;
if (fep->bufdesc_ex)
fep->bufdesc_size = sizeof(struct bufdesc_ex);
else
fep->bufdesc_size = sizeof(struct bufdesc);
bd_size = (fep->tx_ring_size + fep->rx_ring_size) *
fep->bufdesc_size;
/* Allocate memory for buffer descriptors. */
cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma,
cbd_base = dma_alloc_coherent(NULL, bd_size, &fep->bd_dma,
GFP_KERNEL);
if (!cbd_base)
return -ENOMEM;
@ -2064,20 +2072,13 @@ static int fec_enet_init(struct net_device *ndev)
/* make sure MAC we just acquired is programmed into the hw */
fec_set_mac_address(ndev, NULL);
/* init the tx & rx ring size */
fep->tx_ring_size = TX_RING_SIZE;
fep->rx_ring_size = RX_RING_SIZE;
/* Set receive and transmit descriptor base. */
fep->rx_bd_base = cbd_base;
if (fep->bufdesc_ex) {
if (fep->bufdesc_ex)
fep->tx_bd_base = (struct bufdesc *)
(((struct bufdesc_ex *)cbd_base) + fep->rx_ring_size);
fep->bufdesc_size = sizeof(struct bufdesc_ex);
} else {
else
fep->tx_bd_base = cbd_base + fep->rx_ring_size;
fep->bufdesc_size = sizeof(struct bufdesc);
}
/* The FEC Ethernet specific entries in the device structure */
ndev->watchdog_timeo = TX_TIMEOUT;