diff options
Diffstat (limited to 'target/linux/mvebu/patches-5.10/705-net-next-ethernet-marvell-mvnetaMQPrioTCOffload.patch')
| -rw-r--r-- | target/linux/mvebu/patches-5.10/705-net-next-ethernet-marvell-mvnetaMQPrioTCOffload.patch | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-5.10/705-net-next-ethernet-marvell-mvnetaMQPrioTCOffload.patch b/target/linux/mvebu/patches-5.10/705-net-next-ethernet-marvell-mvnetaMQPrioTCOffload.patch new file mode 100644 index 0000000000..d2fd1832d8 --- /dev/null +++ b/target/linux/mvebu/patches-5.10/705-net-next-ethernet-marvell-mvnetaMQPrioTCOffload.patch @@ -0,0 +1,187 @@ +From 2551dc9e398c37a15e52122d385c29a8b06be45f Mon Sep 17 00:00:00 2001 +From: Maxime Chevallier <maxime.chevallier@bootlin.com> +Date: Fri, 26 Nov 2021 12:20:56 +0100 +Subject: net: mvneta: Add TC traffic shaping offload + +The mvneta controller is able to do some tocken-bucket per-queue traffic +shaping. This commit adds support for setting these using the TC mqprio +interface. + +The token-bucket parameters are customisable, but the current +implementation configures them to have a 10kbps resolution for the +rate limitation, since it allows to cover the whole range of max_rate +values from 10kbps to 5Gbps with 10kbps increments. + +Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/marvell/mvneta.c | 120 +++++++++++++++++++++++++++++++++- + 1 file changed, 119 insertions(+), 1 deletion(-) + +(limited to 'drivers/net/ethernet/marvell/mvneta.c') + +diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c +index aba452e8abfe6..2368ae3f0e10d 100644 +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -248,12 +248,39 @@ + #define MVNETA_TXQ_SENT_DESC_MASK 0x3fff0000 + #define MVNETA_PORT_TX_RESET 0x3cf0 + #define MVNETA_PORT_TX_DMA_RESET BIT(0) ++#define MVNETA_TXQ_CMD1_REG 0x3e00 ++#define MVNETA_TXQ_CMD1_BW_LIM_SEL_V1 BIT(3) ++#define MVNETA_TXQ_CMD1_BW_LIM_EN BIT(0) ++#define MVNETA_REFILL_NUM_CLK_REG 0x3e08 ++#define MVNETA_REFILL_MAX_NUM_CLK 0x0000ffff + #define MVNETA_TX_MTU 0x3e0c + #define MVNETA_TX_TOKEN_SIZE 0x3e14 + #define MVNETA_TX_TOKEN_SIZE_MAX 0xffffffff ++#define MVNETA_TXQ_BUCKET_REFILL_REG(q) (0x3e20 + ((q) << 2)) ++#define MVNETA_TXQ_BUCKET_REFILL_PERIOD_MASK 0x3ff00000 ++#define MVNETA_TXQ_BUCKET_REFILL_PERIOD_SHIFT 20 ++#define MVNETA_TXQ_BUCKET_REFILL_VALUE_MAX 0x0007ffff + #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2)) + #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff + ++/* The values of the bucket refill base period and refill period are taken from ++ * the reference manual, and adds up to a base resolution of 10Kbps. This allows ++ * to cover all rate-limit values from 10Kbps up to 5Gbps ++ */ ++ ++/* Base period for the rate limit algorithm */ ++#define MVNETA_TXQ_BUCKET_REFILL_BASE_PERIOD_NS 100 ++ ++/* Number of Base Period to wait between each bucket refill */ ++#define MVNETA_TXQ_BUCKET_REFILL_PERIOD 1000 ++ ++/* The base resolution for rate limiting, in bps. Any max_rate value should be ++ * a multiple of that value. ++ */ ++#define MVNETA_TXQ_RATE_LIMIT_RESOLUTION (NSEC_PER_SEC / \ ++ (MVNETA_TXQ_BUCKET_REFILL_BASE_PERIOD_NS * \ ++ MVNETA_TXQ_BUCKET_REFILL_PERIOD)) ++ + #define MVNETA_LPI_CTRL_0 0x2cc0 + #define MVNETA_LPI_CTRL_1 0x2cc4 + #define MVNETA_LPI_REQUEST_ENABLE BIT(0) +@@ -4906,11 +4933,74 @@ static void mvneta_map_vlan_prio_to_rxq(struct mvneta_port *pp, u8 pri, u8 rxq) + mvreg_write(pp, MVNETA_VLAN_PRIO_TO_RXQ, val); + } + ++static int mvneta_enable_per_queue_rate_limit(struct mvneta_port *pp) ++{ ++ unsigned long core_clk_rate; ++ u32 refill_cycles; ++ u32 val; ++ ++ core_clk_rate = clk_get_rate(pp->clk); ++ if (!core_clk_rate) ++ return -EINVAL; ++ ++ refill_cycles = MVNETA_TXQ_BUCKET_REFILL_BASE_PERIOD_NS / ++ (NSEC_PER_SEC / core_clk_rate); ++ ++ if (refill_cycles > MVNETA_REFILL_MAX_NUM_CLK) ++ return -EINVAL; ++ ++ /* Enable bw limit algorithm version 3 */ ++ val = mvreg_read(pp, MVNETA_TXQ_CMD1_REG); ++ val &= ~(MVNETA_TXQ_CMD1_BW_LIM_SEL_V1 | MVNETA_TXQ_CMD1_BW_LIM_EN); ++ mvreg_write(pp, MVNETA_TXQ_CMD1_REG, val); ++ ++ /* Set the base refill rate */ ++ mvreg_write(pp, MVNETA_REFILL_NUM_CLK_REG, refill_cycles); ++ ++ return 0; ++} ++ ++static void mvneta_disable_per_queue_rate_limit(struct mvneta_port *pp) ++{ ++ u32 val = mvreg_read(pp, MVNETA_TXQ_CMD1_REG); ++ ++ val |= (MVNETA_TXQ_CMD1_BW_LIM_SEL_V1 | MVNETA_TXQ_CMD1_BW_LIM_EN); ++ mvreg_write(pp, MVNETA_TXQ_CMD1_REG, val); ++} ++ ++static int mvneta_setup_queue_rates(struct mvneta_port *pp, int queue, ++ u64 min_rate, u64 max_rate) ++{ ++ u32 refill_val, rem; ++ u32 val = 0; ++ ++ /* Convert to from Bps to bps */ ++ max_rate *= 8; ++ ++ if (min_rate) ++ return -EINVAL; ++ ++ refill_val = div_u64_rem(max_rate, MVNETA_TXQ_RATE_LIMIT_RESOLUTION, ++ &rem); ++ ++ if (rem || !refill_val || ++ refill_val > MVNETA_TXQ_BUCKET_REFILL_VALUE_MAX) ++ return -EINVAL; ++ ++ val = refill_val; ++ val |= (MVNETA_TXQ_BUCKET_REFILL_PERIOD << ++ MVNETA_TXQ_BUCKET_REFILL_PERIOD_SHIFT); ++ ++ mvreg_write(pp, MVNETA_TXQ_BUCKET_REFILL_REG(queue), val); ++ ++ return 0; ++} ++ + static int mvneta_setup_mqprio(struct net_device *dev, + struct tc_mqprio_qopt_offload *mqprio) + { + struct mvneta_port *pp = netdev_priv(dev); +- int rxq, tc; ++ int rxq, txq, tc, ret; + u8 num_tc; + + if (mqprio->qopt.hw != TC_MQPRIO_HW_OFFLOAD_TCS) +@@ -4924,6 +5014,7 @@ static int mvneta_setup_mqprio(struct net_device *dev, + mvneta_clear_rx_prio_map(pp); + + if (!num_tc) { ++ mvneta_disable_per_queue_rate_limit(pp); + netdev_reset_tc(dev); + return 0; + } +@@ -4944,6 +5035,33 @@ static int mvneta_setup_mqprio(struct net_device *dev, + } + } + ++ if (mqprio->shaper != TC_MQPRIO_SHAPER_BW_RATE) { ++ mvneta_disable_per_queue_rate_limit(pp); ++ return 0; ++ } ++ ++ if (mqprio->qopt.num_tc > txq_number) ++ return -EINVAL; ++ ++ ret = mvneta_enable_per_queue_rate_limit(pp); ++ if (ret) ++ return ret; ++ ++ for (tc = 0; tc < mqprio->qopt.num_tc; tc++) { ++ for (txq = mqprio->qopt.offset[tc]; ++ txq < mqprio->qopt.count[tc] + mqprio->qopt.offset[tc]; ++ txq++) { ++ if (txq >= txq_number) ++ return -EINVAL; ++ ++ ret = mvneta_setup_queue_rates(pp, txq, ++ mqprio->min_rate[tc], ++ mqprio->max_rate[tc]); ++ if (ret) ++ return ret; ++ } ++ } ++ + return 0; + } + +-- +cgit 1.2.3-1.el7 + |