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thunderx: setup xdp_rxq_info 

This driver uses a bool scheme for "enable"/"disable" when setting up
different resources.  Thus, the hook points for xdp_rxq_info is done
in the same function call nicvf_rcv_queue_config().  This is activated
through enable/disable via nicvf_config_data_transfer(), which is tied
into nicvf_stop()/nicvf_open().

Extending driver packet handler call-path nicvf_rcv_pkt_handler() with
a pointer to the given struct rcv_queue, in-order to access the
xdp_rxq_info data area (in nicvf_xdp_rx()).

V2: Driver have no proper error path for failed XDP RX-queue info reg,
as nicvf_rcv_queue_config is a void function.

Cc: linux-arm-kernel@lists.infradead.org
Cc: Sunil Goutham <sgoutham@cavium.com>
Cc: Robert Richter <rric@kernel.org>
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 11:25:54 +01:00 committed by Alexei Starovoitov
parent 7f1c684a89
commit 27e95e3648
3 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/ethernet/cavium/thunder/nicvf_main.c
View File

@ -521,7 +521,7 @@ static void nicvf_unmap_page(struct nicvf *nic, struct page *page, u64 dma_addr)
static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
struct cqe_rx_t *cqe_rx, struct snd_queue *sq,
struct sk_buff **skb)
struct rcv_queue *rq, struct sk_buff **skb)
{
struct xdp_buff xdp;
struct page *page;
@ -545,6 +545,7 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
xdp.data = (void *)cpu_addr;
xdp_set_data_meta_invalid(&xdp);
xdp.data_end = xdp.data + len;
xdp.rxq = &rq->xdp_rxq;
orig_data = xdp.data;
rcu_read_lock();
@ -698,7 +699,8 @@ static inline void nicvf_set_rxhash(struct net_device *netdev,
static void nicvf_rcv_pkt_handler(struct net_device *netdev,
struct napi_struct *napi,
struct cqe_rx_t *cqe_rx, struct snd_queue *sq)
struct cqe_rx_t *cqe_rx,
struct snd_queue *sq, struct rcv_queue *rq)
{
struct sk_buff *skb = NULL;
struct nicvf *nic = netdev_priv(netdev);
@ -724,7 +726,7 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev,
/* For XDP, ignore pkts spanning multiple pages */
if (nic->xdp_prog && (cqe_rx->rb_cnt == 1)) {
/* Packet consumed by XDP */
if (nicvf_xdp_rx(snic, nic->xdp_prog, cqe_rx, sq, &skb))
if (nicvf_xdp_rx(snic, nic->xdp_prog, cqe_rx, sq, rq, &skb))
return;
} else {
skb = nicvf_get_rcv_skb(snic, cqe_rx,
@ -781,6 +783,7 @@ static int nicvf_cq_intr_handler(struct net_device *netdev, u8 cq_idx,
struct cqe_rx_t *cq_desc;
struct netdev_queue *txq;
struct snd_queue *sq = &qs->sq[cq_idx];
struct rcv_queue *rq = &qs->rq[cq_idx];
unsigned int tx_pkts = 0, tx_bytes = 0, txq_idx;
spin_lock_bh(&cq->lock);
@ -811,7 +814,7 @@ loop:
switch (cq_desc->cqe_type) {
case CQE_TYPE_RX:
nicvf_rcv_pkt_handler(netdev, napi, cq_desc, sq);
nicvf_rcv_pkt_handler(netdev, napi, cq_desc, sq, rq);
work_done++;
break;
case CQE_TYPE_SEND:

4
drivers/net/ethernet/cavium/thunder/nicvf_queues.c
View File

@ -760,6 +760,7 @@ static void nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
if (!rq->enable) {
nicvf_reclaim_rcv_queue(nic, qs, qidx);
xdp_rxq_info_unreg(&rq->xdp_rxq);
return;
}
@ -772,6 +773,9 @@ static void nicvf_rcv_queue_config(struct nicvf *nic, struct queue_set *qs,
/* all writes of RBDR data to be loaded into L2 Cache as well*/
rq->caching = 1;
/* Driver have no proper error path for failed XDP RX-queue info reg */
WARN_ON(xdp_rxq_info_reg(&rq->xdp_rxq, nic->netdev, qidx) < 0);
/* Send a mailbox msg to PF to config RQ */
mbx.rq.msg = NIC_MBOX_MSG_RQ_CFG;
mbx.rq.qs_num = qs->vnic_id;

2
drivers/net/ethernet/cavium/thunder/nicvf_queues.h
View File

@ -12,6 +12,7 @@
#include <linux/netdevice.h>
#include <linux/iommu.h>
#include <linux/bpf.h>
#include <net/xdp.h>
#include "q_struct.h"
#define MAX_QUEUE_SET 128
@ -255,6 +256,7 @@ struct rcv_queue {
u8 start_qs_rbdr_idx; /* RBDR idx in the above QS */
u8 caching;
struct rx_tx_queue_stats stats;
struct xdp_rxq_info xdp_rxq;
} ____cacheline_aligned_in_smp;
struct cmp_queue {