diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/t4_hw.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index c967b24b72b3..9d93f4c27300 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -4191,6 +4191,52 @@ void t4_load_mtus(struct adapter *adap, const unsigned short *mtus, } } +/* Calculates a rate in bytes/s given the number of 256-byte units per 4K core + * clocks. The formula is + * + * bytes/s = bytes256 * 256 * ClkFreq / 4096 + * + * which is equivalent to + * + * bytes/s = 62.5 * bytes256 * ClkFreq_ms + */ +static u64 chan_rate(struct adapter *adap, unsigned int bytes256) +{ + u64 v = bytes256 * adap->params.vpd.cclk; + + return v * 62 + v / 2; +} + +/** + * t4_get_chan_txrate - get the current per channel Tx rates + * @adap: the adapter + * @nic_rate: rates for NIC traffic + * @ofld_rate: rates for offloaded traffic + * + * Return the current Tx rates in bytes/s for NIC and offloaded traffic + * for each channel. + */ +void t4_get_chan_txrate(struct adapter *adap, u64 *nic_rate, u64 *ofld_rate) +{ + u32 v; + + v = t4_read_reg(adap, TP_TX_TRATE_A); + nic_rate[0] = chan_rate(adap, TNLRATE0_G(v)); + nic_rate[1] = chan_rate(adap, TNLRATE1_G(v)); + if (adap->params.arch.nchan == NCHAN) { + nic_rate[2] = chan_rate(adap, TNLRATE2_G(v)); + nic_rate[3] = chan_rate(adap, TNLRATE3_G(v)); + } + + v = t4_read_reg(adap, TP_TX_ORATE_A); + ofld_rate[0] = chan_rate(adap, OFDRATE0_G(v)); + ofld_rate[1] = chan_rate(adap, OFDRATE1_G(v)); + if (adap->params.arch.nchan == NCHAN) { + ofld_rate[2] = chan_rate(adap, OFDRATE2_G(v)); + ofld_rate[3] = chan_rate(adap, OFDRATE3_G(v)); + } +} + /** * t4_pmtx_get_stats - returns the HW stats from PMTX * @adap: the adapter |