diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2020-02-16 08:03:32 +1100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-02-16 19:48:21 -0800 |
| commit | 5d58c21c1030d8aaebeafd068304d12bc9c6bff7 (patch) | |
| tree | 6f611f3e91411f4e54ce585307bc95f29f72447f /drivers/net/ethernet/natsemi/sonic.c | |
| parent | 888d0584afb884b3c402c5d01aa8c0006c25bc52 (diff) | |
net/sonic: Refactor duplicated code
No functional change.
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/natsemi/sonic.c')
| -rw-r--r-- | drivers/net/ethernet/natsemi/sonic.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/net/ethernet/natsemi/sonic.c b/drivers/net/ethernet/natsemi/sonic.c index e01273654f81..c066510b348e 100644 --- a/drivers/net/ethernet/natsemi/sonic.c +++ b/drivers/net/ethernet/natsemi/sonic.c @@ -50,6 +50,42 @@ static void sonic_msg_init(struct net_device *dev) netif_dbg(lp, drv, dev, "%s", version); } +static int sonic_alloc_descriptors(struct net_device *dev) +{ + struct sonic_local *lp = netdev_priv(dev); + + /* Allocate a chunk of memory for the descriptors. Note that this + * must not cross a 64K boundary. It is smaller than one page which + * means that page alignment is a sufficient condition. + */ + lp->descriptors = + dma_alloc_coherent(lp->device, + SIZEOF_SONIC_DESC * + SONIC_BUS_SCALE(lp->dma_bitmode), + &lp->descriptors_laddr, GFP_KERNEL); + + if (!lp->descriptors) + return -ENOMEM; + + lp->cda = lp->descriptors; + lp->tda = lp->cda + SIZEOF_SONIC_CDA * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rda = lp->tda + SIZEOF_SONIC_TD * SONIC_NUM_TDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rra = lp->rda + SIZEOF_SONIC_RD * SONIC_NUM_RDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + + lp->cda_laddr = lp->descriptors_laddr; + lp->tda_laddr = lp->cda_laddr + SIZEOF_SONIC_CDA * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rda_laddr = lp->tda_laddr + SIZEOF_SONIC_TD * SONIC_NUM_TDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rra_laddr = lp->rda_laddr + SIZEOF_SONIC_RD * SONIC_NUM_RDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + + return 0; +} + /* * Open/initialize the SONIC controller. * |