From 1ac14241543c0108e9fd23aca4927a148a44c815 Mon Sep 17 00:00:00 2001 From: Jose Abreu Date: Wed, 18 Dec 2019 11:33:08 +0100 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/common.h | 1 + drivers/net/ethernet/stmicro/stmmac/hwif.h | 4 +++ .../net/ethernet/stmicro/stmmac/stmmac_tc.c | 29 ++++++++++++++++++- 3 files changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h index 2f1fc93a9b1e..09c72025ed3e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/common.h +++ b/drivers/net/ethernet/stmicro/stmmac/common.h @@ -367,6 +367,7 @@ struct dma_features { unsigned int estwid; unsigned int estdep; unsigned int estsel; + unsigned int fpesel; }; /* GMAC TX FIFO is 8K, Rx FIFO is 16K */ diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h index 22f79c0a9343..905a6f0edaca 100644 --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h @@ -376,6 +376,8 @@ struct stmmac_ops { void (*set_arp_offload)(struct mac_device_info *hw, bool en, u32 addr); int (*est_configure)(void __iomem *ioaddr, struct stmmac_est *cfg, unsigned int ptp_rate); + void (*fpe_configure)(void __iomem *ioaddr, u32 num_txq, u32 num_rxq, + bool enable); }; #define stmmac_core_init(__priv, __args...) \ @@ -464,6 +466,8 @@ struct stmmac_ops { stmmac_do_void_callback(__priv, mac, set_arp_offload, __args) #define stmmac_est_configure(__priv, __args...) \ stmmac_do_callback(__priv, mac, est_configure, __args) +#define stmmac_fpe_configure(__priv, __args...) \ + stmmac_do_void_callback(__priv, mac, fpe_configure, __args) /* PTP and HW Timer helpers */ struct stmmac_hwtimestamp { 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) { -- 2.30.2