diff options
| author | Horatiu Vultur <horatiu.vultur@microchip.com> | 2022-11-23 21:31:37 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-25 10:38:10 +0000 |
| commit | 560c7223d6e48171d5a34ca07f6c886d364bcbdf (patch) | |
| tree | c3520e318ff0e004f7b22c906146f9a275c6749b /drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c | |
| parent | 77ddda44411c36f6276616b9609a50ca98dc4d2c (diff) | |
net: lan966x: Update dma_dir of page_pool_params
To add support for XDP_TX it is required to be able to write to the DMA
area therefore it is required that the pages will be mapped using
DMA_BIDIRECTIONAL flag.
Therefore check if there are any xdp programs on the interfaces and in
that case set DMA_BIDRECTIONAL otherwise use DMA_FROM_DEVICE.
Therefore when a new XDP program is added it is required to redo the
page_pool.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c index 8ebde1eb6a09..ba7aa6df9d0e 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c @@ -11,6 +11,8 @@ static int lan966x_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp) struct lan966x_port *port = netdev_priv(dev); struct lan966x *lan966x = port->lan966x; struct bpf_prog *old_prog; + bool old_xdp, new_xdp; + int err; if (!lan966x->fdma) { NL_SET_ERR_MSG_MOD(xdp->extack, @@ -18,7 +20,20 @@ static int lan966x_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp) return -EOPNOTSUPP; } + old_xdp = lan966x_xdp_present(lan966x); old_prog = xchg(&port->xdp_prog, xdp->prog); + new_xdp = lan966x_xdp_present(lan966x); + + if (old_xdp == new_xdp) + goto out; + + err = lan966x_fdma_reload_page_pool(lan966x); + if (err) { + xchg(&port->xdp_prog, old_prog); + return err; + } + +out: if (old_prog) bpf_prog_put(old_prog); @@ -62,6 +77,19 @@ int lan966x_xdp_run(struct lan966x_port *port, struct page *page, u32 data_len) } } +bool lan966x_xdp_present(struct lan966x *lan966x) +{ + for (int p = 0; p < lan966x->num_phys_ports; ++p) { + if (!lan966x->ports[p]) + continue; + + if (lan966x_xdp_port_present(lan966x->ports[p])) + return true; + } + + return false; +} + int lan966x_xdp_port_init(struct lan966x_port *port) { struct lan966x *lan966x = port->lan966x; |