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net: stmmac: Add support for CBS QDISC

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This adds support for CBS reconfiguration using the TC application.

A new callback was added to TC ops struct and another one to DMA ops to
reconfigure the channel mode.

Tested in GMAC5.10.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Vitor Soares <soares@synopsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2018-06-27 15:57:02 +01:00 committed by David S. Miller
parent 30408a43a3
commit 1f705bc61a
4 changed files with 87 additions and 0 deletions
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15
drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
View File

@ -407,6 +407,19 @@ static void dwmac4_enable_tso(void __iomem *ioaddr, bool en, u32 chan)
}
}
static void dwmac4_qmode(void __iomem *ioaddr, u32 channel, u8 qmode)
{
u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel));
mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK;
if (qmode != MTL_QUEUE_AVB)
mtl_tx_op |= MTL_OP_MODE_TXQEN;
else
mtl_tx_op |= MTL_OP_MODE_TXQEN_AV;
writel(mtl_tx_op, ioaddr + MTL_CHAN_TX_OP_MODE(channel));
}
const struct stmmac_dma_ops dwmac4_dma_ops = {
.reset = dwmac4_dma_reset,
.init = dwmac4_dma_init,
@ -431,6 +444,7 @@ const struct stmmac_dma_ops dwmac4_dma_ops = {
.set_rx_tail_ptr = dwmac4_set_rx_tail_ptr,
.set_tx_tail_ptr = dwmac4_set_tx_tail_ptr,
.enable_tso = dwmac4_enable_tso,
.qmode = dwmac4_qmode,
};
const struct stmmac_dma_ops dwmac410_dma_ops = {
@ -457,4 +471,5 @@ const struct stmmac_dma_ops dwmac410_dma_ops = {
.set_rx_tail_ptr = dwmac4_set_rx_tail_ptr,
.set_tx_tail_ptr = dwmac4_set_tx_tail_ptr,
.enable_tso = dwmac4_enable_tso,
.qmode = dwmac4_qmode,
};

8
drivers/net/ethernet/stmicro/stmmac/hwif.h
View File

@ -183,6 +183,7 @@ struct stmmac_dma_ops {
void (*set_rx_tail_ptr)(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
void (*set_tx_tail_ptr)(void __iomem *ioaddr, u32 tail_ptr, u32 chan);
void (*enable_tso)(void __iomem *ioaddr, bool en, u32 chan);
void (*qmode)(void __iomem *ioaddr, u32 channel, u8 qmode);
};
#define stmmac_reset(__priv, __args...) \
@ -235,6 +236,8 @@ struct stmmac_dma_ops {
stmmac_do_void_callback(__priv, dma, set_tx_tail_ptr, __args)
#define stmmac_enable_tso(__priv, __args...) \
stmmac_do_void_callback(__priv, dma, enable_tso, __args)
#define stmmac_dma_qmode(__priv, __args...) \
stmmac_do_void_callback(__priv, dma, qmode, __args)
struct mac_device_info;
struct net_device;
@ -441,17 +444,22 @@ struct stmmac_mode_ops {
struct stmmac_priv;
struct tc_cls_u32_offload;
struct tc_cbs_qopt_offload;
struct stmmac_tc_ops {
int (*init)(struct stmmac_priv *priv);
int (*setup_cls_u32)(struct stmmac_priv *priv,
struct tc_cls_u32_offload *cls);
int (*setup_cbs)(struct stmmac_priv *priv,
struct tc_cbs_qopt_offload *qopt);
};
#define stmmac_tc_init(__priv, __args...) \
stmmac_do_callback(__priv, tc, init, __args)
#define stmmac_tc_setup_cls_u32(__priv, __args...) \
stmmac_do_callback(__priv, tc, setup_cls_u32, __args)
#define stmmac_tc_setup_cbs(__priv, __args...) \
stmmac_do_callback(__priv, tc, setup_cbs, __args)
struct stmmac_regs_off {
u32 ptp_off;

2
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -3793,6 +3793,8 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
switch (type) {
case TC_SETUP_BLOCK:
return stmmac_setup_tc_block(priv, type_data);
case TC_SETUP_QDISC_CBS:
return stmmac_tc_setup_cbs(priv, priv, type_data);
default:
return -EOPNOTSUPP;
}

62
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
View File

@ -289,7 +289,69 @@ static int tc_init(struct stmmac_priv *priv)
return 0;
}
static int tc_setup_cbs(struct stmmac_priv *priv,
struct tc_cbs_qopt_offload *qopt)
{
u32 tx_queues_count = priv->plat->tx_queues_to_use;
u32 queue = qopt->queue;
u32 ptr, speed_div;
u32 mode_to_use;
u64 value;
int ret;
/* Queue 0 is not AVB capable */
if (queue <= 0 || queue >= tx_queues_count)
return -EINVAL;
if (priv->speed != SPEED_100 && priv->speed != SPEED_1000)
return -EOPNOTSUPP;
mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB);
if (ret)
return ret;
priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
} else if (!qopt->enable) {
return stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_DCB);
}
/* Port Transmit Rate and Speed Divider */
ptr = (priv->speed == SPEED_100) ? 4 : 8;
speed_div = (priv->speed == SPEED_100) ? 100000 : 1000000;
/* Final adjustments for HW */
value = qopt->idleslope * 1024 * ptr;
do_div(value, speed_div);
priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0);
value = -qopt->sendslope * 1024UL * ptr;
do_div(value, speed_div);
priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0);
value = qopt->hicredit * 1024 * 8;
priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0);
value = qopt->locredit * 1024 * 8;
priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0);
ret = stmmac_config_cbs(priv, priv->hw,
priv->plat->tx_queues_cfg[queue].send_slope,
priv->plat->tx_queues_cfg[queue].idle_slope,
priv->plat->tx_queues_cfg[queue].high_credit,
priv->plat->tx_queues_cfg[queue].low_credit,
queue);
if (ret)
return ret;
dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n",
queue, qopt->sendslope, qopt->idleslope,
qopt->hicredit, qopt->locredit);
return 0;
}
const struct stmmac_tc_ops dwmac510_tc_ops = {
.init = tc_init,
.setup_cls_u32 = tc_setup_cls_u32,
.setup_cbs = tc_setup_cbs,
};