diff options
Diffstat (limited to 'drivers')
4 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c index fbe1986b87f6..c12cfa4113cc 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c @@ -2445,7 +2445,11 @@ static int liquidio_napi_poll(struct napi_struct *napi, int budget) __func__, iq_no); } - if ((work_done < budget) && (tx_done)) { + /* force enable interrupt if reg cnts are high to avoid wraparound */ + if ((work_done < budget && tx_done) || + (iq->pkt_in_done >= MAX_REG_CNT) || + (droq->pkt_count >= MAX_REG_CNT)) { + tx_done = 1; napi_complete_done(napi, work_done); octeon_process_droq_poll_cmd(droq->oct_dev, droq->q_no, POLL_EVENT_ENABLE_INTR, 0); diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c index 78cfa8ba1b57..631f1c0f9e4d 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c @@ -1630,7 +1630,11 @@ static int liquidio_napi_poll(struct napi_struct *napi, int budget) __func__, iq_no); } - if ((work_done < budget) && (tx_done)) { + /* force enable interrupt if reg cnts are high to avoid wraparound */ + if ((work_done < budget && tx_done) || + (iq->pkt_in_done >= MAX_REG_CNT) || + (droq->pkt_count >= MAX_REG_CNT)) { + tx_done = 1; napi_complete_done(napi, work_done); octeon_process_droq_poll_cmd(droq->oct_dev, droq->q_no, POLL_EVENT_ENABLE_INTR, 0); diff --git a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h index bc0af8af1a0c..294c6f3c6b48 100644 --- a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h +++ b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h @@ -99,6 +99,7 @@ enum octeon_tag_type { #define CVM_DRV_APP_END (CVM_DRV_INVALID_APP - 1) #define BYTES_PER_DHLEN_UNIT 8 +#define MAX_REG_CNT 2000000U static inline u32 incr_index(u32 index, u32 count, u32 max) { diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.c b/drivers/net/ethernet/cavium/liquidio/octeon_device.c index a8df493a5012..9675ffbf25e6 100644 --- a/drivers/net/ethernet/cavium/liquidio/octeon_device.c +++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.c @@ -1361,6 +1361,8 @@ void lio_enable_irq(struct octeon_droq *droq, struct octeon_instr_queue *iq) spin_lock_bh(&droq->lock); writel(droq->pkt_count, droq->pkts_sent_reg); droq->pkt_count = 0; + /* this write needs to be flushed before we release the lock */ + mmiowb(); spin_unlock_bh(&droq->lock); oct = droq->oct_dev; } @@ -1368,6 +1370,8 @@ void lio_enable_irq(struct octeon_droq *droq, struct octeon_instr_queue *iq) spin_lock_bh(&iq->lock); writel(iq->pkt_in_done, iq->inst_cnt_reg); iq->pkt_in_done = 0; + /* this write needs to be flushed before we release the lock */ + mmiowb(); spin_unlock_bh(&iq->lock); oct = iq->oct_dev; } |