Commit 2a37daa6 authored by Iyappan Subramanian's avatar Iyappan Subramanian Committed by David S. Miller

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

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: default avatarIyappan Subramanian <isubramanian@apm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 582a1db9
...@@ -973,6 +973,17 @@ static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p) ...@@ -973,6 +973,17 @@ static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p)
return owner; 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) static int xgene_enet_create_desc_rings(struct net_device *ndev)
{ {
struct xgene_enet_pdata *pdata = netdev_priv(ndev); struct xgene_enet_pdata *pdata = netdev_priv(ndev);
...@@ -981,13 +992,15 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev) ...@@ -981,13 +992,15 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
struct xgene_enet_desc_ring *buf_pool = NULL; struct xgene_enet_desc_ring *buf_pool = NULL;
enum xgene_ring_owner owner; enum xgene_ring_owner owner;
dma_addr_t dma_exp_bufs; dma_addr_t dma_exp_bufs;
u8 cpu_bufnum = pdata->cpu_bufnum; u8 cpu_bufnum;
u8 eth_bufnum = pdata->eth_bufnum; u8 eth_bufnum = pdata->eth_bufnum;
u8 bp_bufnum = pdata->bp_bufnum; u8 bp_bufnum = pdata->bp_bufnum;
u16 ring_num = pdata->ring_num; u16 ring_num = pdata->ring_num;
u16 ring_id; u16 ring_id;
int i, ret, size; int i, ret, size;
cpu_bufnum = xgene_start_cpu_bufnum(pdata);
for (i = 0; i < pdata->rxq_cnt; i++) { for (i = 0; i < pdata->rxq_cnt; i++) {
/* allocate rx descriptor ring */ /* allocate rx descriptor ring */
owner = xgene_derive_ring_owner(pdata); owner = xgene_derive_ring_owner(pdata);
......
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