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drivers: net: xgene: Get channel number from device binding

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This patch gets ethernet to CPU channel (prefetch buffer number) from
the newly added 'channel' property, thus decoupling Linux driver from
resource management.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Iyappan Subramanian 2016-04-29 11:10:13 -07:00 committed by David S. Miller
parent 582a1db988
commit 2a37daa634
1 changed files with 14 additions and 1 deletions
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15
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
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@ -973,6 +973,17 @@ static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p)
return owner;
}
static u8 xgene_start_cpu_bufnum(struct xgene_enet_pdata *pdata)
{
struct device *dev = &pdata->pdev->dev;
u32 cpu_bufnum;
int ret;
ret = device_property_read_u32(dev, "channel", &cpu_bufnum);
return (!ret) ? cpu_bufnum : pdata->cpu_bufnum;
}
static int xgene_enet_create_desc_rings(struct net_device *ndev)
{
struct xgene_enet_pdata *pdata = netdev_priv(ndev);
@ -981,13 +992,15 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
struct xgene_enet_desc_ring *buf_pool = NULL;
enum xgene_ring_owner owner;
dma_addr_t dma_exp_bufs;
u8 cpu_bufnum = pdata->cpu_bufnum;
u8 cpu_bufnum;
u8 eth_bufnum = pdata->eth_bufnum;
u8 bp_bufnum = pdata->bp_bufnum;
u16 ring_num = pdata->ring_num;
u16 ring_id;
int i, ret, size;
cpu_bufnum = xgene_start_cpu_bufnum(pdata);
for (i = 0; i < pdata->rxq_cnt; i++) {
/* allocate rx descriptor ring */
owner = xgene_derive_ring_owner(pdata);