diff options
| author | Jose Abreu <Jose.Abreu@synopsys.com> | 2019-08-17 20:54:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-08-17 12:43:59 -0700 |
| commit | 25e80cd05ff81e51750106f1ae12364449ec38e7 (patch) | |
| tree | 520b8763df7b9e4e6a67608cbc94345a61aa5c45 /drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | |
| parent | 83beee5a3aff0fb159b2fb4d0cac8f18a193417e (diff) | |
net: stmmac: Get correct timestamp values from XGMAC
TX Timestamp in XGMAC comes from MAC instead of descriptors. Implement
this in a new callback.
Also, RX Timestamp in XGMAC must be cheked against corruption and we need
a barrier to make sure that descriptor fields are read correctly.
Changes from v2:
- Rework return code check (Jakub)
Changes from v1:
- Rework the get timestamp function (David)
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c index 8c5dd6a36157..58b69fa97837 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c @@ -98,11 +98,17 @@ static int dwxgmac2_rx_check_timestamp(void *desc) unsigned int rdes3 = le32_to_cpu(p->des3); bool desc_valid, ts_valid; + dma_rmb(); + desc_valid = !(rdes3 & XGMAC_RDES3_OWN) && (rdes3 & XGMAC_RDES3_CTXT); ts_valid = !(rdes3 & XGMAC_RDES3_TSD) && (rdes3 & XGMAC_RDES3_TSA); - if (likely(desc_valid && ts_valid)) + if (likely(desc_valid && ts_valid)) { + if ((p->des0 == 0xffffffff) && (p->des1 == 0xffffffff)) + return -EINVAL; return 0; + } + return -EINVAL; } @@ -113,13 +119,10 @@ static int dwxgmac2_get_rx_timestamp_status(void *desc, void *next_desc, unsigned int rdes3 = le32_to_cpu(p->des3); int ret = -EBUSY; - if (likely(rdes3 & XGMAC_RDES3_CDA)) { + if (likely(rdes3 & XGMAC_RDES3_CDA)) ret = dwxgmac2_rx_check_timestamp(next_desc); - if (ret) - return ret; - } - return ret; + return !ret; } static void dwxgmac2_init_rx_desc(struct dma_desc *p, int disable_rx_ic, |