diff options
| author |   Jose Abreu <Jose.Abreu@synopsys.com> | 2019-12-18 11:33:08 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-12-18 12:17:11 -0800 |
| commit | 1ac14241543c0108e9fd23aca4927a148a44c815 (patch) | |
| tree | aeeaad1e25b30264386d25f4b9768b9430d84331 /drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | |
| parent | net: stmmac: Integrate EST with TAPRIO scheduler API (diff) | |
| download | linux-1ac14241543c0108e9fd23aca4927a148a44c815.tar.xz linux-1ac14241543c0108e9fd23aca4927a148a44c815.zip | |
net: stmmac: Add Frame Preemption support using TAPRIO API
Adds the support for Frame Preemption using TAPRIO API. This works along
with EST feature and allows to select if preemptable traffic shall be
sent during specific queues opening time.
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c index 58d4ce094381..8ff8f9b9bb22 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c @@ -597,6 +597,7 @@ static int tc_setup_taprio(struct stmmac_priv *priv, u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep; struct plat_stmmacenet_data *plat = priv->plat; struct timespec64 time; + bool fpe = false; int i, ret = 0; if (!priv->dma_cap.estsel) @@ -667,8 +668,23 @@ static int tc_setup_taprio(struct stmmac_priv *priv, return -ERANGE; if (gates > GENMASK(31 - wid, 0)) return -ERANGE; - if (qopt->entries[i].command != TC_TAPRIO_CMD_SET_GATES) + + switch (qopt->entries[i].command) { + case TC_TAPRIO_CMD_SET_GATES: + if (fpe) + return -EINVAL; + break; + case TC_TAPRIO_CMD_SET_AND_HOLD: + gates |= BIT(0); + fpe = true; + break; + case TC_TAPRIO_CMD_SET_AND_RELEASE: + gates &= ~BIT(0); + fpe = true; + break; + default: return -EOPNOTSUPP; + } priv->plat->est->gcl[i] = delta_ns | (gates << wid); } @@ -681,6 +697,17 @@ static int tc_setup_taprio(struct stmmac_priv *priv, priv->plat->est->ctr[0] = (u32)(qopt->cycle_time % NSEC_PER_SEC); priv->plat->est->ctr[1] = (u32)(qopt->cycle_time / NSEC_PER_SEC); + if (fpe && !priv->dma_cap.fpesel) + return -EOPNOTSUPP; + + ret = stmmac_fpe_configure(priv, priv->ioaddr, + priv->plat->tx_queues_to_use, + priv->plat->rx_queues_to_use, fpe); + if (ret && fpe) { + netdev_err(priv->dev, "failed to enable Frame Preemption\n"); + return ret; + } + ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, priv->plat->clk_ptp_rate); if (ret) { |