diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h index 6384f6a23349..184d5d83e497 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h @@ -40,7 +40,7 @@ * frames in the Rx queues (length of the current frame is not * taken into account when making the taildrop decision) */ -#define DPAA2_ETH_TAILDROP_THRESH (64 * 1024) +#define DPAA2_ETH_FQ_TAILDROP_THRESH (64 * 1024) /* Maximum number of Tx confirmation frames to be processed * in a single NAPI call @@ -52,11 +52,20 @@ * how many 64B frames fit inside the taildrop threshold and add a margin * to accommodate the buffer refill delay. */ -#define DPAA2_ETH_MAX_FRAMES_PER_QUEUE (DPAA2_ETH_TAILDROP_THRESH / 64) +#define DPAA2_ETH_MAX_FRAMES_PER_QUEUE (DPAA2_ETH_FQ_TAILDROP_THRESH / 64) #define DPAA2_ETH_NUM_BUFS (DPAA2_ETH_MAX_FRAMES_PER_QUEUE + 256) #define DPAA2_ETH_REFILL_THRESH \ (DPAA2_ETH_NUM_BUFS - DPAA2_ETH_BUFS_PER_CMD) +/* Congestion group taildrop threshold: number of frames allowed to accumulate + * at any moment in a group of Rx queues belonging to the same traffic class. + * Choose value such that we don't risk depleting the buffer pool before the + * taildrop kicks in + */ +#define DPAA2_ETH_CG_TAILDROP_THRESH(priv) \ + (DPAA2_ETH_MAX_FRAMES_PER_QUEUE * dpaa2_eth_queue_count(priv) / \ + dpaa2_eth_tc_count(priv)) + /* Maximum number of buffers that can be acquired/released through a single * QBMan command */ |