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net: mvneta: Convert to be 64 bits compatible

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Prepare the mvneta driver in order to be usable on the 64 bits platform
such as the Armada 3700.

[gregory.clement@free-electrons.com]: this patch was extract from a larger
one to ease review and maintenance.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcin Wojtas 2016-12-01 18:03:07 +01:00 committed by David S. Miller
parent f88bee1c4b
commit 8d5047cf9c
1 changed files with 16 additions and 1 deletions
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17
drivers/net/ethernet/marvell/mvneta.c
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@ -296,6 +296,12 @@
/* descriptor aligned size */
#define MVNETA_DESC_ALIGNED_SIZE 32
/* Number of bytes to be taken into account by HW when putting incoming data
* to the buffers. It is needed in case NET_SKB_PAD exceeds maximum packet
* offset supported in MVNETA_RXQ_CONFIG_REG(q) registers.
*/
#define MVNETA_RX_PKT_OFFSET_CORRECTION 64
#define MVNETA_RX_PKT_SIZE(mtu) \
ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \
ETH_HLEN + ETH_FCS_LEN, \
@ -416,6 +422,7 @@ struct mvneta_port {
u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)];
u32 indir[MVNETA_RSS_LU_TABLE_SIZE];
u16 rx_offset_correction;
};
/* The mvneta_tx_desc and mvneta_rx_desc structures describe the
@ -1807,6 +1814,7 @@ static int mvneta_rx_refill(struct mvneta_port *pp,
return -ENOMEM;
}
phys_addr += pp->rx_offset_correction;
mvneta_rx_desc_fill(rx_desc, phys_addr, data, rxq);
return 0;
}
@ -2782,7 +2790,7 @@ static int mvneta_rxq_init(struct mvneta_port *pp,
mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size);
/* Set Offset */
mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD);
mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD - pp->rx_offset_correction);
/* Set coalescing pkts and time */
mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal);
@ -4033,6 +4041,13 @@ static int mvneta_probe(struct platform_device *pdev)
pp->rxq_def = rxq_def;
/* Set RX packet offset correction for platforms, whose
* NET_SKB_PAD, exceeds 64B. It should be 64B for 64-bit
* platforms and 0B for 32-bit ones.
*/
pp->rx_offset_correction =
max(0, NET_SKB_PAD - MVNETA_RX_PKT_OFFSET_CORRECTION);
pp->indir[0] = rxq_def;
pp->clk = devm_clk_get(&pdev->dev, "core");