diff options
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nicvf_queues.h')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_queues.h | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h index 2e3c940c1093..9e2104675bc9 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h @@ -85,12 +85,26 @@ #define MAX_CQES_FOR_TX ((SND_QUEUE_LEN / MIN_SQ_DESC_PER_PKT_XMIT) * \ MAX_CQE_PER_PKT_XMIT) -/* Calculate number of CQEs to reserve for all SQEs. - * Its 1/256th level of CQ size. - * '+ 1' to account for pipelining + +/* RED and Backpressure levels of CQ for pkt reception + * For CQ, level is a measure of emptiness i.e 0x0 means full + * eg: For CQ of size 4K, and for pass/drop levels of 160/144 + * HW accepts pkt if unused CQE >= 2560 + * RED accepts pkt if unused CQE < 2304 & >= 2560 + * DROPs pkts if unused CQE < 2304 + */ +#define RQ_PASS_CQ_LVL 160ULL +#define RQ_DROP_CQ_LVL 144ULL + +/* RED and Backpressure levels of RBDR for pkt reception + * For RBDR, level is a measure of fullness i.e 0x0 means empty + * eg: For RBDR of size 8K, and for pass/drop levels of 4/0 + * HW accepts pkt if unused RBs >= 256 + * RED accepts pkt if unused RBs < 256 & >= 0 + * DROPs pkts if unused RBs < 0 */ -#define RQ_CQ_DROP ((256 / (CMP_QUEUE_LEN / \ - (CMP_QUEUE_LEN - MAX_CQES_FOR_TX))) + 1) +#define RQ_PASS_RBDR_LVL 8ULL +#define RQ_DROP_RBDR_LVL 0ULL /* Descriptor size in bytes */ #define SND_QUEUE_DESC_SIZE 16 @@ -292,7 +306,8 @@ void nicvf_sq_disable(struct nicvf *nic, int qidx); void nicvf_put_sq_desc(struct snd_queue *sq, int desc_cnt); void nicvf_sq_free_used_descs(struct net_device *netdev, struct snd_queue *sq, int qidx); -int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb); +int nicvf_sq_append_skb(struct nicvf *nic, struct snd_queue *sq, + struct sk_buff *skb, u8 sq_num); struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx); void nicvf_rbdr_task(unsigned long data); |