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nfp: setup xdp_rxq_info 

Driver hook points for xdp_rxq_info:
 * reg  : nfp_net_rx_ring_alloc
 * unreg: nfp_net_rx_ring_free

In struct nfp_net_rx_ring moved member @size into a hole on 64-bit.
Thus, the size remaines the same after adding member @xdp_rxq.

Cc: oss-drivers@netronome.com
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jesper Dangaard Brouer 2018-01-03 11:25:49 +01:00 committed by Alexei Starovoitov
parent 96a8604f95
commit 7f1c684a89
2 changed files with 12 additions and 3 deletions
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5
drivers/net/ethernet/netronome/nfp/nfp_net.h
View File

@ -47,6 +47,7 @@
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/io-64-nonatomic-hi-lo.h>
#include <net/xdp.h>
#include "nfp_net_ctrl.h"
@ -350,6 +351,7 @@ struct nfp_net_rx_buf {
* @rxds: Virtual address of FL/RX ring in host memory
* @dma: DMA address of the FL/RX ring
* @size: Size, in bytes, of the FL/RX ring (needed to free)
* @xdp_rxq: RX-ring info avail for XDP
*/
struct nfp_net_rx_ring {
struct nfp_net_r_vector *r_vec;
@ -361,13 +363,14 @@ struct nfp_net_rx_ring {
u32 idx;
int fl_qcidx;
unsigned int size;
u8 __iomem *qcp_fl;
struct nfp_net_rx_buf *rxbufs;
struct nfp_net_rx_desc *rxds;
dma_addr_t dma;
unsigned int size;
struct xdp_rxq_info xdp_rxq;
} ____cacheline_aligned;
/**

10
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View File

@ -1608,11 +1608,13 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
unsigned int true_bufsz;
struct sk_buff *skb;
int pkts_polled = 0;
struct xdp_buff xdp;
int idx;
rcu_read_lock();
xdp_prog = READ_ONCE(dp->xdp_prog);
true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz;
xdp.rxq = &rx_ring->xdp_rxq;
tx_ring = r_vec->xdp_ring;
while (pkts_polled < budget) {
@ -1703,7 +1705,6 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
dp->bpf_offload_xdp) && !meta.portid) {
void *orig_data = rxbuf->frag + pkt_off;
unsigned int dma_off;
struct xdp_buff xdp;
int act;
xdp.data_hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM;
@ -2252,6 +2253,7 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
kfree(rx_ring->rxbufs);
if (rx_ring->rxds)
@ -2275,7 +2277,11 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
static int
nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
{
int sz;
int sz, err;
err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, rx_ring->idx);
if (err < 0)
return err;
rx_ring->cnt = dp->rxd_cnt;
rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;