Merge branch 'lan966x-qos'

Horatiu Vultur says:

====================
net: lan966x: Add tbf, cbs, ets support

Add support for offloading QoS features with tc command to lan966x.
The offloaded Qos features are tbf, cbs and ets.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/lan966x/Makefile

@@ -9,4 +9,5 @@ lan966x-switch-objs  := lan966x_main.o lan966x_phylink.o lan966x_port.o \
 			lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \
 			lan966x_vlan.o lan966x_fdb.o lan966x_mdb.o \
 			lan966x_ptp.o lan966x_fdma.o lan966x_lag.o \
-			lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o
+			lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o \
+			lan966x_tbf.o lan966x_cbs.o lan966x_ets.o

drivers/net/ethernet/microchip/lan966x/lan966x_cbs.c

@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+
+int lan966x_cbs_add(struct lan966x_port *port,
+		    struct tc_cbs_qopt_offload *qopt)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u32 cir, cbs;
+	u8 se_idx;
+
+	/* Check for invalid values */
+	if (qopt->idleslope <= 0 ||
+	    qopt->sendslope >= 0 ||
+	    qopt->locredit >= qopt->hicredit)
+		return -EINVAL;
+
+	se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue;
+	cir = qopt->idleslope;
+	cbs = (qopt->idleslope - qopt->sendslope) *
+		(qopt->hicredit - qopt->locredit) /
+		-qopt->sendslope;
+
+	/* Rate unit is 100 kbps */
+	cir = DIV_ROUND_UP(cir, 100);
+	/* Avoid using zero rate */
+	cir = cir ?: 1;
+	/* Burst unit is 4kB */
+	cbs = DIV_ROUND_UP(cbs, 4096);
+	/* Avoid using zero burst */
+	cbs = cbs ?: 1;
+
+	/* Check that actually the result can be written */
+	if (cir > GENMASK(15, 0) ||
+	    cbs > GENMASK(6, 0))
+		return -EINVAL;
+
+	lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) |
+		QSYS_SE_CFG_SE_FRM_MODE_SET(1),
+		QSYS_SE_CFG_SE_AVB_ENA |
+		QSYS_SE_CFG_SE_FRM_MODE,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(cir) |
+	       QSYS_CIR_CFG_CIR_BURST_SET(cbs),
+	       lan966x, QSYS_CIR_CFG(se_idx));
+
+	return 0;
+}
+
+int lan966x_cbs_del(struct lan966x_port *port,
+		    struct tc_cbs_qopt_offload *qopt)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u8 se_idx;
+
+	se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue;
+
+	lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) |
+		QSYS_SE_CFG_SE_FRM_MODE_SET(0),
+		QSYS_SE_CFG_SE_AVB_ENA |
+		QSYS_SE_CFG_SE_FRM_MODE,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(0) |
+	       QSYS_CIR_CFG_CIR_BURST_SET(0),
+	       lan966x, QSYS_CIR_CFG(se_idx));
+
+	return 0;
+}

drivers/net/ethernet/microchip/lan966x/lan966x_ets.c

@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+
+#define DWRR_COST_BIT_WIDTH	BIT(5)
+
+static u32 lan966x_ets_hw_cost(u32 w_min, u32 weight)
+{
+	u32 res;
+
+	/* Round half up: Multiply with 16 before division,
+	 * add 8 and divide result with 16 again
+	 */
+	res = (((DWRR_COST_BIT_WIDTH << 4) * w_min / weight) + 8) >> 4;
+	return max_t(u32, 1, res) - 1;
+}
+
+int lan966x_ets_add(struct lan966x_port *port,
+		    struct tc_ets_qopt_offload *qopt)
+{
+	struct tc_ets_qopt_offload_replace_params *params;
+	struct lan966x *lan966x = port->lan966x;
+	u32 w_min = 100;
+	u8 count = 0;
+	u32 se_idx;
+	u8 i;
+
+	/* Check the input */
+	if (qopt->parent != TC_H_ROOT)
+		return -EINVAL;
+
+	params = &qopt->replace_params;
+	if (params->bands != NUM_PRIO_QUEUES)
+		return -EINVAL;
+
+	for (i = 0; i < params->bands; ++i) {
+		/* In the switch the DWRR is always on the lowest consecutive
+		 * priorities. Due to this, the first priority must map to the
+		 * first DWRR band.
+		 */
+		if (params->priomap[i] != (7 - i))
+			return -EINVAL;
+
+		if (params->quanta[i] && params->weights[i] == 0)
+			return -EINVAL;
+	}
+
+	se_idx = SE_IDX_PORT + port->chip_port;
+
+	/* Find minimum weight */
+	for (i = 0; i < params->bands; ++i) {
+		if (params->quanta[i] == 0)
+			continue;
+
+		w_min = min(w_min, params->weights[i]);
+	}
+
+	for (i = 0; i < params->bands; ++i) {
+		if (params->quanta[i] == 0)
+			continue;
+
+		++count;
+
+		lan_wr(lan966x_ets_hw_cost(w_min, params->weights[i]),
+		       lan966x, QSYS_SE_DWRR_CFG(se_idx, 7 - i));
+	}
+
+	lan_rmw(QSYS_SE_CFG_SE_DWRR_CNT_SET(count) |
+		QSYS_SE_CFG_SE_RR_ENA_SET(0),
+		QSYS_SE_CFG_SE_DWRR_CNT |
+		QSYS_SE_CFG_SE_RR_ENA,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	return 0;
+}
+
+int lan966x_ets_del(struct lan966x_port *port,
+		    struct tc_ets_qopt_offload *qopt)
+{
+	struct lan966x *lan966x = port->lan966x;
+	u32 se_idx;
+	int i;
+
+	se_idx = SE_IDX_PORT + port->chip_port;
+
+	for (i = 0; i < NUM_PRIO_QUEUES; ++i)
+		lan_wr(0, lan966x, QSYS_SE_DWRR_CFG(se_idx, i));
+
+	lan_rmw(QSYS_SE_CFG_SE_DWRR_CNT_SET(0) |
+		QSYS_SE_CFG_SE_RR_ENA_SET(0),
+		QSYS_SE_CFG_SE_DWRR_CNT |
+		QSYS_SE_CFG_SE_RR_ENA,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	return 0;
+}

drivers/net/ethernet/microchip/lan966x/lan966x_main.h

@@ -9,6 +9,7 @@
 #include <linux/phy.h>
 #include <linux/phylink.h>
 #include <linux/ptp_clock_kernel.h>
+#include <net/pkt_cls.h>
 #include <net/pkt_sched.h>
 #include <net/switchdev.h>
 
@@ -81,6 +82,9 @@
 #define FDMA_INJ_CHANNEL		0
 #define FDMA_DCB_MAX			512
 
+#define SE_IDX_QUEUE			0  /* 0-79 : Queue scheduler elements */
+#define SE_IDX_PORT			80 /* 80-89 : Port schedular elements */
+
 /* MAC table entry types.
  * ENTRYTYPE_NORMAL is subject to aging.
  * ENTRYTYPE_LOCKED is not subject to aging.
@@ -462,6 +466,21 @@ int lan966x_taprio_add(struct lan966x_port *port,
 int lan966x_taprio_del(struct lan966x_port *port);
 int lan966x_taprio_speed_set(struct lan966x_port *port, int speed);
 
+int lan966x_tbf_add(struct lan966x_port *port,
+		    struct tc_tbf_qopt_offload *qopt);
+int lan966x_tbf_del(struct lan966x_port *port,
+		    struct tc_tbf_qopt_offload *qopt);
+
+int lan966x_cbs_add(struct lan966x_port *port,
+		    struct tc_cbs_qopt_offload *qopt);
+int lan966x_cbs_del(struct lan966x_port *port,
+		    struct tc_cbs_qopt_offload *qopt);
+
+int lan966x_ets_add(struct lan966x_port *port,
+		    struct tc_ets_qopt_offload *qopt);
+int lan966x_ets_del(struct lan966x_port *port,
+		    struct tc_ets_qopt_offload *qopt);
+
 static inline void __iomem *lan_addr(void __iomem *base[],
 				     int id, int tinst, int tcnt,
 				     int gbase, int ginst,

drivers/net/ethernet/microchip/lan966x/lan966x_regs.h

@@ -1018,6 +1018,56 @@ enum lan966x_target {
 /*      QSYS:RES_CTRL:RES_CFG */
 #define QSYS_RES_CFG(g)           __REG(TARGET_QSYS, 0, 1, 32768, g, 1024, 8, 0, 0, 1, 4)
 
+/*      QSYS:HSCH:CIR_CFG */
+#define QSYS_CIR_CFG(g)           __REG(TARGET_QSYS, 0, 1, 16384, g, 90, 128, 0, 0, 1, 4)
+
+#define QSYS_CIR_CFG_CIR_RATE                    GENMASK(20, 6)
+#define QSYS_CIR_CFG_CIR_RATE_SET(x)\
+	FIELD_PREP(QSYS_CIR_CFG_CIR_RATE, x)
+#define QSYS_CIR_CFG_CIR_RATE_GET(x)\
+	FIELD_GET(QSYS_CIR_CFG_CIR_RATE, x)
+
+#define QSYS_CIR_CFG_CIR_BURST                   GENMASK(5, 0)
+#define QSYS_CIR_CFG_CIR_BURST_SET(x)\
+	FIELD_PREP(QSYS_CIR_CFG_CIR_BURST, x)
+#define QSYS_CIR_CFG_CIR_BURST_GET(x)\
+	FIELD_GET(QSYS_CIR_CFG_CIR_BURST, x)
+
+/*      QSYS:HSCH:SE_CFG */
+#define QSYS_SE_CFG(g)            __REG(TARGET_QSYS, 0, 1, 16384, g, 90, 128, 8, 0, 1, 4)
+
+#define QSYS_SE_CFG_SE_DWRR_CNT                  GENMASK(9, 6)
+#define QSYS_SE_CFG_SE_DWRR_CNT_SET(x)\
+	FIELD_PREP(QSYS_SE_CFG_SE_DWRR_CNT, x)
+#define QSYS_SE_CFG_SE_DWRR_CNT_GET(x)\
+	FIELD_GET(QSYS_SE_CFG_SE_DWRR_CNT, x)
+
+#define QSYS_SE_CFG_SE_RR_ENA                    BIT(5)
+#define QSYS_SE_CFG_SE_RR_ENA_SET(x)\
+	FIELD_PREP(QSYS_SE_CFG_SE_RR_ENA, x)
+#define QSYS_SE_CFG_SE_RR_ENA_GET(x)\
+	FIELD_GET(QSYS_SE_CFG_SE_RR_ENA, x)
+
+#define QSYS_SE_CFG_SE_AVB_ENA                   BIT(4)
+#define QSYS_SE_CFG_SE_AVB_ENA_SET(x)\
+	FIELD_PREP(QSYS_SE_CFG_SE_AVB_ENA, x)
+#define QSYS_SE_CFG_SE_AVB_ENA_GET(x)\
+	FIELD_GET(QSYS_SE_CFG_SE_AVB_ENA, x)
+
+#define QSYS_SE_CFG_SE_FRM_MODE                  GENMASK(3, 2)
+#define QSYS_SE_CFG_SE_FRM_MODE_SET(x)\
+	FIELD_PREP(QSYS_SE_CFG_SE_FRM_MODE, x)
+#define QSYS_SE_CFG_SE_FRM_MODE_GET(x)\
+	FIELD_GET(QSYS_SE_CFG_SE_FRM_MODE, x)
+
+#define QSYS_SE_DWRR_CFG(g, r)    __REG(TARGET_QSYS, 0, 1, 16384, g, 90, 128, 12, r, 12, 4)
+
+#define QSYS_SE_DWRR_CFG_DWRR_COST               GENMASK(4, 0)
+#define QSYS_SE_DWRR_CFG_DWRR_COST_SET(x)\
+	FIELD_PREP(QSYS_SE_DWRR_CFG_DWRR_COST, x)
+#define QSYS_SE_DWRR_CFG_DWRR_COST_GET(x)\
+	FIELD_GET(QSYS_SE_DWRR_CFG_DWRR_COST, x)
+
 /*      QSYS:TAS_CONFIG:TAS_CFG_CTRL */
 #define QSYS_TAS_CFG_CTRL         __REG(TARGET_QSYS, 0, 1, 57372, 0, 1, 12, 0, 0, 1, 4)
 

drivers/net/ethernet/microchip/lan966x/lan966x_tbf.c

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+
+int lan966x_tbf_add(struct lan966x_port *port,
+		    struct tc_tbf_qopt_offload *qopt)
+{
+	struct lan966x *lan966x = port->lan966x;
+	bool root = qopt->parent == TC_H_ROOT;
+	u32 queue = 0;
+	u32 cir, cbs;
+	u32 se_idx;
+
+	if (!root) {
+		queue = TC_H_MIN(qopt->parent) - 1;
+		if (queue >= NUM_PRIO_QUEUES)
+			return -EOPNOTSUPP;
+	}
+
+	if (root)
+		se_idx = SE_IDX_PORT + port->chip_port;
+	else
+		se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + queue;
+
+	cir = div_u64(qopt->replace_params.rate.rate_bytes_ps, 1000) * 8;
+	cbs = qopt->replace_params.max_size;
+
+	/* Rate unit is 100 kbps */
+	cir = DIV_ROUND_UP(cir, 100);
+	/* Avoid using zero rate */
+	cir = cir ?: 1;
+	/* Burst unit is 4kB */
+	cbs = DIV_ROUND_UP(cbs, 4096);
+	/* Avoid using zero burst */
+	cbs = cbs ?: 1;
+
+	/* Check that actually the result can be written */
+	if (cir > GENMASK(15, 0) ||
+	    cbs > GENMASK(6, 0))
+		return -EINVAL;
+
+	lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(0) |
+		QSYS_SE_CFG_SE_FRM_MODE_SET(1),
+		QSYS_SE_CFG_SE_AVB_ENA |
+		QSYS_SE_CFG_SE_FRM_MODE,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(cir) |
+	       QSYS_CIR_CFG_CIR_BURST_SET(cbs),
+	       lan966x, QSYS_CIR_CFG(se_idx));
+
+	return 0;
+}
+
+int lan966x_tbf_del(struct lan966x_port *port,
+		    struct tc_tbf_qopt_offload *qopt)
+{
+	struct lan966x *lan966x = port->lan966x;
+	bool root = qopt->parent == TC_H_ROOT;
+	u32 queue = 0;
+	u32 se_idx;
+
+	if (!root) {
+		queue = TC_H_MIN(qopt->parent) - 1;
+		if (queue >= NUM_PRIO_QUEUES)
+			return -EOPNOTSUPP;
+	}
+
+	if (root)
+		se_idx = SE_IDX_PORT + port->chip_port;
+	else
+		se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + queue;
+
+	lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(0) |
+		QSYS_SE_CFG_SE_FRM_MODE_SET(0),
+		QSYS_SE_CFG_SE_AVB_ENA |
+		QSYS_SE_CFG_SE_FRM_MODE,
+		lan966x, QSYS_SE_CFG(se_idx));
+
+	lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(0) |
+	       QSYS_CIR_CFG_CIR_BURST_SET(0),
+	       lan966x, QSYS_CIR_CFG(se_idx));
+
+	return 0;
+}