[PATCH net-next 3/5] net: microchip: sparx5: add support for offloading tbf qdisc
Daniel Machon
daniel.machon at microchip.com
Mon Sep 19 05:02:13 PDT 2022
Add support for offloading tbf qdisc to sparx5 qdisc.
The tbf qdisc makes it possible to attach a shaper on traffic egressing
from a port or a queue. Per-port tbf qdiscs are attached as a root qdisc
directly and queue tbf qdiscs are attached to one of the classes of a
parent qdisc (such as mqprio).
Signed-off-by: Daniel Machon <daniel.machon at microchip.com>
Signed-off-by: Steen Hegelund <steen.hegelund at microchip.com>
---
.../ethernet/microchip/sparx5/sparx5_main.c | 7 +
.../microchip/sparx5/sparx5_main_regs.h | 150 +++++++
.../ethernet/microchip/sparx5/sparx5_qos.c | 402 ++++++++++++++++++
.../ethernet/microchip/sparx5/sparx5_qos.h | 51 +++
.../net/ethernet/microchip/sparx5/sparx5_tc.c | 39 ++
5 files changed, 649 insertions(+)
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
index bbe41734360e..62a325e96345 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
@@ -27,6 +27,7 @@
#include "sparx5_main_regs.h"
#include "sparx5_main.h"
#include "sparx5_port.h"
+#include "sparx5_qos.h"
#define QLIM_WM(fraction) \
((SPX5_BUFFER_MEMORY / SPX5_BUFFER_CELL_SZ - 100) * (fraction) / 100)
@@ -868,6 +869,12 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
goto cleanup_ports;
}
+ err = sparx5_qos_init(sparx5);
+ if (err) {
+ dev_err(sparx5->dev, "Failed to initialize QoS\n");
+ goto cleanup_ports;
+ }
+
err = sparx5_ptp_init(sparx5);
if (err) {
dev_err(sparx5->dev, "PTP failed\n");
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main_regs.h b/drivers/net/ethernet/microchip/sparx5/sparx5_main_regs.h
index c94de436b281..87a5b169c812 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main_regs.h
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main_regs.h
@@ -2993,6 +2993,132 @@ enum sparx5_target {
#define GCB_SIO_CLOCK_SYS_CLK_PERIOD_GET(x)\
FIELD_GET(GCB_SIO_CLOCK_SYS_CLK_PERIOD, x)
+/* HSCH:HSCH_CFG:CIR_CFG */
+#define HSCH_CIR_CFG(g) __REG(TARGET_HSCH, 0, 1, 0, g, 5040, 32, 0, 0, 1, 4)
+
+#define HSCH_CIR_CFG_CIR_RATE GENMASK(22, 6)
+#define HSCH_CIR_CFG_CIR_RATE_SET(x)\
+ FIELD_PREP(HSCH_CIR_CFG_CIR_RATE, x)
+#define HSCH_CIR_CFG_CIR_RATE_GET(x)\
+ FIELD_GET(HSCH_CIR_CFG_CIR_RATE, x)
+
+#define HSCH_CIR_CFG_CIR_BURST GENMASK(5, 0)
+#define HSCH_CIR_CFG_CIR_BURST_SET(x)\
+ FIELD_PREP(HSCH_CIR_CFG_CIR_BURST, x)
+#define HSCH_CIR_CFG_CIR_BURST_GET(x)\
+ FIELD_GET(HSCH_CIR_CFG_CIR_BURST, x)
+
+/* HSCH:HSCH_CFG:EIR_CFG */
+#define HSCH_EIR_CFG(g) __REG(TARGET_HSCH, 0, 1, 0, g, 5040, 32, 4, 0, 1, 4)
+
+#define HSCH_EIR_CFG_EIR_RATE GENMASK(22, 6)
+#define HSCH_EIR_CFG_EIR_RATE_SET(x)\
+ FIELD_PREP(HSCH_EIR_CFG_EIR_RATE, x)
+#define HSCH_EIR_CFG_EIR_RATE_GET(x)\
+ FIELD_GET(HSCH_EIR_CFG_EIR_RATE, x)
+
+#define HSCH_EIR_CFG_EIR_BURST GENMASK(5, 0)
+#define HSCH_EIR_CFG_EIR_BURST_SET(x)\
+ FIELD_PREP(HSCH_EIR_CFG_EIR_BURST, x)
+#define HSCH_EIR_CFG_EIR_BURST_GET(x)\
+ FIELD_GET(HSCH_EIR_CFG_EIR_BURST, x)
+
+/* HSCH:HSCH_CFG:SE_CFG */
+#define HSCH_SE_CFG(g) __REG(TARGET_HSCH, 0, 1, 0, g, 5040, 32, 8, 0, 1, 4)
+
+#define HSCH_SE_CFG_SE_DWRR_CNT GENMASK(12, 6)
+#define HSCH_SE_CFG_SE_DWRR_CNT_SET(x)\
+ FIELD_PREP(HSCH_SE_CFG_SE_DWRR_CNT, x)
+#define HSCH_SE_CFG_SE_DWRR_CNT_GET(x)\
+ FIELD_GET(HSCH_SE_CFG_SE_DWRR_CNT, x)
+
+#define HSCH_SE_CFG_SE_AVB_ENA BIT(5)
+#define HSCH_SE_CFG_SE_AVB_ENA_SET(x)\
+ FIELD_PREP(HSCH_SE_CFG_SE_AVB_ENA, x)
+#define HSCH_SE_CFG_SE_AVB_ENA_GET(x)\
+ FIELD_GET(HSCH_SE_CFG_SE_AVB_ENA, x)
+
+#define HSCH_SE_CFG_SE_FRM_MODE GENMASK(4, 3)
+#define HSCH_SE_CFG_SE_FRM_MODE_SET(x)\
+ FIELD_PREP(HSCH_SE_CFG_SE_FRM_MODE, x)
+#define HSCH_SE_CFG_SE_FRM_MODE_GET(x)\
+ FIELD_GET(HSCH_SE_CFG_SE_FRM_MODE, x)
+
+#define HSCH_SE_CFG_SE_DWRR_FRM_MODE GENMASK(2, 1)
+#define HSCH_SE_CFG_SE_DWRR_FRM_MODE_SET(x)\
+ FIELD_PREP(HSCH_SE_CFG_SE_DWRR_FRM_MODE, x)
+#define HSCH_SE_CFG_SE_DWRR_FRM_MODE_GET(x)\
+ FIELD_GET(HSCH_SE_CFG_SE_DWRR_FRM_MODE, x)
+
+#define HSCH_SE_CFG_SE_STOP BIT(0)
+#define HSCH_SE_CFG_SE_STOP_SET(x)\
+ FIELD_PREP(HSCH_SE_CFG_SE_STOP, x)
+#define HSCH_SE_CFG_SE_STOP_GET(x)\
+ FIELD_GET(HSCH_SE_CFG_SE_STOP, x)
+
+/* HSCH:HSCH_CFG:SE_CONNECT */
+#define HSCH_SE_CONNECT(g) __REG(TARGET_HSCH, 0, 1, 0, g, 5040, 32, 12, 0, 1, 4)
+
+#define HSCH_SE_CONNECT_SE_LEAK_LINK GENMASK(15, 0)
+#define HSCH_SE_CONNECT_SE_LEAK_LINK_SET(x)\
+ FIELD_PREP(HSCH_SE_CONNECT_SE_LEAK_LINK, x)
+#define HSCH_SE_CONNECT_SE_LEAK_LINK_GET(x)\
+ FIELD_GET(HSCH_SE_CONNECT_SE_LEAK_LINK, x)
+
+/* HSCH:HSCH_CFG:SE_DLB_SENSE */
+#define HSCH_SE_DLB_SENSE(g) __REG(TARGET_HSCH, 0, 1, 0, g, 5040, 32, 16, 0, 1, 4)
+
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO GENMASK(12, 10)
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO_SET(x)\
+ FIELD_PREP(HSCH_SE_DLB_SENSE_SE_DLB_PRIO, x)
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO_GET(x)\
+ FIELD_GET(HSCH_SE_DLB_SENSE_SE_DLB_PRIO, x)
+
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT GENMASK(9, 3)
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT_SET(x)\
+ FIELD_PREP(HSCH_SE_DLB_SENSE_SE_DLB_DPORT, x)
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT_GET(x)\
+ FIELD_GET(HSCH_SE_DLB_SENSE_SE_DLB_DPORT, x)
+
+#define HSCH_SE_DLB_SENSE_SE_DLB_SE_ENA BIT(2)
+#define HSCH_SE_DLB_SENSE_SE_DLB_SE_ENA_SET(x)\
+ FIELD_PREP(HSCH_SE_DLB_SENSE_SE_DLB_SE_ENA, x)
+#define HSCH_SE_DLB_SENSE_SE_DLB_SE_ENA_GET(x)\
+ FIELD_GET(HSCH_SE_DLB_SENSE_SE_DLB_SE_ENA, x)
+
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO_ENA BIT(1)
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO_ENA_SET(x)\
+ FIELD_PREP(HSCH_SE_DLB_SENSE_SE_DLB_PRIO_ENA, x)
+#define HSCH_SE_DLB_SENSE_SE_DLB_PRIO_ENA_GET(x)\
+ FIELD_GET(HSCH_SE_DLB_SENSE_SE_DLB_PRIO_ENA, x)
+
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT_ENA BIT(0)
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT_ENA_SET(x)\
+ FIELD_PREP(HSCH_SE_DLB_SENSE_SE_DLB_DPORT_ENA, x)
+#define HSCH_SE_DLB_SENSE_SE_DLB_DPORT_ENA_GET(x)\
+ FIELD_GET(HSCH_SE_DLB_SENSE_SE_DLB_DPORT_ENA, x)
+
+/* HSCH:HSCH_MISC:HSCH_CFG_CFG */
+#define HSCH_HSCH_CFG_CFG __REG(TARGET_HSCH, 0, 1, 163104, 0, 1, 648, 284, 0, 1, 4)
+
+#define HSCH_HSCH_CFG_CFG_CFG_SE_IDX GENMASK(26, 14)
+#define HSCH_HSCH_CFG_CFG_CFG_SE_IDX_SET(x)\
+ FIELD_PREP(HSCH_HSCH_CFG_CFG_CFG_SE_IDX, x)
+#define HSCH_HSCH_CFG_CFG_CFG_SE_IDX_GET(x)\
+ FIELD_GET(HSCH_HSCH_CFG_CFG_CFG_SE_IDX, x)
+
+#define HSCH_HSCH_CFG_CFG_HSCH_LAYER GENMASK(13, 12)
+#define HSCH_HSCH_CFG_CFG_HSCH_LAYER_SET(x)\
+ FIELD_PREP(HSCH_HSCH_CFG_CFG_HSCH_LAYER, x)
+#define HSCH_HSCH_CFG_CFG_HSCH_LAYER_GET(x)\
+ FIELD_GET(HSCH_HSCH_CFG_CFG_HSCH_LAYER, x)
+
+#define HSCH_HSCH_CFG_CFG_CSR_GRANT GENMASK(11, 0)
+#define HSCH_HSCH_CFG_CFG_CSR_GRANT_SET(x)\
+ FIELD_PREP(HSCH_HSCH_CFG_CFG_CSR_GRANT, x)
+#define HSCH_HSCH_CFG_CFG_CSR_GRANT_GET(x)\
+ FIELD_GET(HSCH_HSCH_CFG_CFG_CSR_GRANT, x)
+
/* HSCH:HSCH_MISC:SYS_CLK_PER */
#define HSCH_SYS_CLK_PER __REG(TARGET_HSCH, 0, 1, 163104, 0, 1, 648, 640, 0, 1, 4)
@@ -3002,6 +3128,30 @@ enum sparx5_target {
#define HSCH_SYS_CLK_PER_SYS_CLK_PER_100PS_GET(x)\
FIELD_GET(HSCH_SYS_CLK_PER_SYS_CLK_PER_100PS, x)
+/* HSCH:HSCH_LEAK_LISTS:HSCH_TIMER_CFG */
+#define HSCH_HSCH_TIMER_CFG(g, r) __REG(TARGET_HSCH, 0, 1, 161664, g, 4, 32, 0, r, 4, 4)
+
+#define HSCH_HSCH_TIMER_CFG_LEAK_TIME GENMASK(17, 0)
+#define HSCH_HSCH_TIMER_CFG_LEAK_TIME_SET(x)\
+ FIELD_PREP(HSCH_HSCH_TIMER_CFG_LEAK_TIME, x)
+#define HSCH_HSCH_TIMER_CFG_LEAK_TIME_GET(x)\
+ FIELD_GET(HSCH_HSCH_TIMER_CFG_LEAK_TIME, x)
+
+/* HSCH:HSCH_LEAK_LISTS:HSCH_LEAK_CFG */
+#define HSCH_HSCH_LEAK_CFG(g, r) __REG(TARGET_HSCH, 0, 1, 161664, g, 4, 32, 16, r, 4, 4)
+
+#define HSCH_HSCH_LEAK_CFG_LEAK_FIRST GENMASK(16, 1)
+#define HSCH_HSCH_LEAK_CFG_LEAK_FIRST_SET(x)\
+ FIELD_PREP(HSCH_HSCH_LEAK_CFG_LEAK_FIRST, x)
+#define HSCH_HSCH_LEAK_CFG_LEAK_FIRST_GET(x)\
+ FIELD_GET(HSCH_HSCH_LEAK_CFG_LEAK_FIRST, x)
+
+#define HSCH_HSCH_LEAK_CFG_LEAK_ERR BIT(0)
+#define HSCH_HSCH_LEAK_CFG_LEAK_ERR_SET(x)\
+ FIELD_PREP(HSCH_HSCH_LEAK_CFG_LEAK_ERR, x)
+#define HSCH_HSCH_LEAK_CFG_LEAK_ERR_GET(x)\
+ FIELD_GET(HSCH_HSCH_LEAK_CFG_LEAK_ERR, x)
+
/* HSCH:SYSTEM:FLUSH_CTRL */
#define HSCH_FLUSH_CTRL __REG(TARGET_HSCH, 0, 1, 184000, 0, 1, 312, 4, 0, 1, 4)
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_qos.c b/drivers/net/ethernet/microchip/sparx5/sparx5_qos.c
index 1febc3cdc571..3f3872ab2921 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_qos.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_qos.c
@@ -4,7 +4,363 @@
* Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
*/
+#include <net/pkt_cls.h>
+
#include "sparx5_main.h"
+#include "sparx5_qos.h"
+
+/* Max rates for leak groups */
+static const u32 spx5_hsch_max_group_rate[SPX5_HSCH_LEAK_GRP_CNT] = {
+ 1048568, /* 1.049 Gbps */
+ 2621420, /* 2.621 Gbps */
+ 10485680, /* 10.486 Gbps */
+ 26214200 /* 26.214 Gbps */
+};
+
+static struct sparx5_layer layers[SPX5_HSCH_LAYER_CNT];
+
+static u32 sparx5_lg_get_leak_time(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ u32 value;
+
+ value = spx5_rd(sparx5, HSCH_HSCH_TIMER_CFG(layer, group));
+ return HSCH_HSCH_TIMER_CFG_LEAK_TIME_GET(value);
+}
+
+static void sparx5_lg_set_leak_time(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 leak_time)
+{
+ spx5_wr(HSCH_HSCH_TIMER_CFG_LEAK_TIME_SET(leak_time), sparx5,
+ HSCH_HSCH_TIMER_CFG(layer, group));
+}
+
+static u32 sparx5_lg_get_first(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ u32 value;
+
+ value = spx5_rd(sparx5, HSCH_HSCH_LEAK_CFG(layer, group));
+ return HSCH_HSCH_LEAK_CFG_LEAK_FIRST_GET(value);
+}
+
+static u32 sparx5_lg_get_next(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 idx)
+
+{
+ u32 value;
+
+ value = spx5_rd(sparx5, HSCH_SE_CONNECT(idx));
+ return HSCH_SE_CONNECT_SE_LEAK_LINK_GET(value);
+}
+
+static u32 sparx5_lg_get_last(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ u32 itr, next;
+
+ itr = sparx5_lg_get_first(sparx5, layer, group);
+
+ for (;;) {
+ next = sparx5_lg_get_next(sparx5, layer, group, itr);
+ if (itr == next)
+ return itr;
+
+ itr = next;
+ }
+}
+
+static bool sparx5_lg_is_last(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 idx)
+{
+ return idx == sparx5_lg_get_next(sparx5, layer, group, idx);
+}
+
+static bool sparx5_lg_is_first(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 idx)
+{
+ return idx == sparx5_lg_get_first(sparx5, layer, group);
+}
+
+static bool sparx5_lg_is_empty(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ return sparx5_lg_get_leak_time(sparx5, layer, group) == 0;
+}
+
+static bool sparx5_lg_is_singular(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ if (sparx5_lg_is_empty(sparx5, layer, group))
+ return false;
+
+ return sparx5_lg_get_first(sparx5, layer, group) ==
+ sparx5_lg_get_last(sparx5, layer, group);
+}
+
+static void sparx5_lg_enable(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 leak_time)
+{
+ sparx5_lg_set_leak_time(sparx5, layer, group, leak_time);
+}
+
+static void sparx5_lg_disable(struct sparx5 *sparx5, u32 layer, u32 group)
+{
+ sparx5_lg_set_leak_time(sparx5, layer, group, 0);
+}
+
+static int sparx5_lg_get_group_by_index(struct sparx5 *sparx5, u32 layer,
+ u32 idx, u32 *group)
+{
+ u32 itr, next;
+ int i;
+
+ for (i = 0; i < SPX5_HSCH_LEAK_GRP_CNT; i++) {
+ if (sparx5_lg_is_empty(sparx5, layer, i))
+ continue;
+
+ itr = sparx5_lg_get_first(sparx5, layer, i);
+
+ for (;;) {
+ next = sparx5_lg_get_next(sparx5, layer, i, itr);
+
+ if (itr == idx) {
+ *group = i;
+ return 0; /* Found it */
+ }
+ if (itr == next)
+ break; /* Was not found */
+
+ itr = next;
+ }
+ }
+
+ return -1;
+}
+
+static int sparx5_lg_get_group_by_rate(u32 layer, u32 rate, u32 *group)
+{
+ struct sparx5_layer *l = &layers[layer];
+ struct sparx5_lg *lg;
+ u32 i;
+
+ for (i = 0; i < SPX5_HSCH_LEAK_GRP_CNT; i++) {
+ lg = &l->leak_groups[i];
+ if (rate <= lg->max_rate) {
+ *group = i;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static int sparx5_lg_get_adjacent(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 idx, u32 *prev, u32 *next, u32 *first)
+{
+ u32 itr;
+
+ *first = sparx5_lg_get_first(sparx5, layer, group);
+ *prev = *first;
+ *next = *first;
+ itr = *first;
+
+ for (;;) {
+ *next = sparx5_lg_get_next(sparx5, layer, group, itr);
+
+ if (itr == idx)
+ return 0; /* Found it */
+
+ if (itr == *next)
+ return -1; /* Was not found */
+
+ *prev = itr;
+ itr = *next;
+ }
+
+ return -1;
+}
+
+static int sparx5_lg_conf_set(struct sparx5 *sparx5, u32 layer, u32 group,
+ u32 se_first, u32 idx, u32 idx_next, bool empty)
+{
+ u32 leak_time = layers[layer].leak_groups[group].leak_time;
+
+ /* Stop leaking */
+ sparx5_lg_disable(sparx5, layer, group);
+
+ if (empty)
+ return 0;
+
+ /* Select layer */
+ spx5_rmw(HSCH_HSCH_CFG_CFG_HSCH_LAYER_SET(layer),
+ HSCH_HSCH_CFG_CFG_HSCH_LAYER, sparx5, HSCH_HSCH_CFG_CFG);
+
+ /* Link elements */
+ spx5_wr(HSCH_SE_CONNECT_SE_LEAK_LINK_SET(idx_next), sparx5,
+ HSCH_SE_CONNECT(idx));
+
+ /* Set the first element. */
+ spx5_rmw(HSCH_HSCH_LEAK_CFG_LEAK_FIRST_SET(se_first),
+ HSCH_HSCH_LEAK_CFG_LEAK_FIRST, sparx5,
+ HSCH_HSCH_LEAK_CFG(layer, group));
+
+ /* Start leaking */
+ sparx5_lg_enable(sparx5, layer, group, leak_time);
+
+ return 0;
+}
+
+static int sparx5_lg_del(struct sparx5 *sparx5, u32 layer, u32 group, u32 idx)
+{
+ u32 first, next, prev;
+ bool empty = false;
+
+ /* idx *must* be present in the leak group */
+ WARN_ON(sparx5_lg_get_adjacent(sparx5, layer, group, idx, &prev, &next,
+ &first) < 0);
+
+ if (sparx5_lg_is_singular(sparx5, layer, group)) {
+ empty = true;
+ } else if (sparx5_lg_is_last(sparx5, layer, group, idx)) {
+ /* idx is removed, prev is now last */
+ idx = prev;
+ next = prev;
+ } else if (sparx5_lg_is_first(sparx5, layer, group, idx)) {
+ /* idx is removed and points to itself, first is next */
+ first = next;
+ next = idx;
+ } else {
+ /* Next is not touched */
+ idx = prev;
+ }
+
+ return sparx5_lg_conf_set(sparx5, layer, group, first, idx, next,
+ empty);
+}
+
+static int sparx5_lg_add(struct sparx5 *sparx5, u32 layer, u32 new_group,
+ u32 idx)
+{
+ u32 first, next, old_group;
+
+ pr_debug("ADD: layer: %d, new_group: %d, idx: %d", layer, new_group,
+ idx);
+
+ /* Is this SE already shaping ? */
+ if (sparx5_lg_get_group_by_index(sparx5, layer, idx, &old_group) >= 0) {
+ if (old_group != new_group) {
+ /* Delete from old group */
+ sparx5_lg_del(sparx5, layer, old_group, idx);
+ } else {
+ /* Nothing to do here */
+ return 0;
+ }
+ }
+
+ /* We always add to head of the list */
+ first = idx;
+
+ if (sparx5_lg_is_empty(sparx5, layer, new_group))
+ next = idx;
+ else
+ next = sparx5_lg_get_first(sparx5, layer, new_group);
+
+ return sparx5_lg_conf_set(sparx5, layer, new_group, first, idx, next,
+ false);
+}
+
+static int sparx5_shaper_conf_set(struct sparx5_port *port,
+ const struct sparx5_shaper *sh, u32 layer,
+ u32 idx, u32 group)
+{
+ int (*sparx5_lg_action)(struct sparx5 *, u32, u32, u32);
+ struct sparx5 *sparx5 = port->sparx5;
+
+ if (!sh->rate && !sh->burst)
+ sparx5_lg_action = &sparx5_lg_del;
+ else
+ sparx5_lg_action = &sparx5_lg_add;
+
+ /* Select layer */
+ spx5_rmw(HSCH_HSCH_CFG_CFG_HSCH_LAYER_SET(layer),
+ HSCH_HSCH_CFG_CFG_HSCH_LAYER, sparx5, HSCH_HSCH_CFG_CFG);
+
+ /* Set frame mode */
+ spx5_rmw(HSCH_SE_CFG_SE_FRM_MODE_SET(sh->mode), HSCH_SE_CFG_SE_FRM_MODE,
+ sparx5, HSCH_SE_CFG(idx));
+
+ /* Set committed rate and burst */
+ spx5_wr(HSCH_CIR_CFG_CIR_RATE_SET(sh->rate) |
+ HSCH_CIR_CFG_CIR_BURST_SET(sh->burst),
+ sparx5, HSCH_CIR_CFG(idx));
+
+ /* This has to be done after the shaper configuration has been set */
+ sparx5_lg_action(sparx5, layer, group, idx);
+
+ return 0;
+}
+
+static int sparx5_leak_groups_init(struct sparx5 *sparx5)
+{
+ struct sparx5_layer *layer;
+ u32 sys_clk_per_100ps;
+ struct sparx5_lg *lg;
+ u32 leak_time_us;
+ int i, ii;
+
+ sys_clk_per_100ps = spx5_rd(sparx5, HSCH_SYS_CLK_PER);
+
+ for (i = 0; i < SPX5_HSCH_LAYER_CNT; i++) {
+ layer = &layers[i];
+ for (ii = 0; ii < SPX5_HSCH_LEAK_GRP_CNT; ii++) {
+ lg = &layer->leak_groups[ii];
+ lg->max_rate = spx5_hsch_max_group_rate[ii];
+
+ /* Calculate the leak time in us, to serve a maximum
+ * rate of 'max_rate' for this group
+ */
+ leak_time_us = (SPX5_SE_RATE_MAX * 1000) / lg->max_rate;
+
+ /* Hardware wants leak time in ns */
+ lg->leak_time = 1000 * leak_time_us;
+
+ /* Calculate resolution */
+ lg->resolution = 1000 / leak_time_us;
+
+ /* Maximum number of shapers that can be served by
+ * this leak group
+ */
+ lg->max_ses = (1000 * leak_time_us) / sys_clk_per_100ps;
+
+ /* Example:
+ * Wanted bandwidth is 100Mbit:
+ *
+ * 100 mbps can be served by leak group zero.
+ *
+ * leak_time is 125000 ns.
+ * resolution is: 8
+ *
+ * cir = 100000 / 8 = 12500
+ * leaks_pr_sec = 125000 / 10^9 = 8000
+ * bw = 12500 * 8000 = 10^8 (100 Mbit)
+ */
+
+ /* Disable by default - this also indicates an empty
+ * leak group
+ */
+ sparx5_lg_disable(sparx5, i, ii);
+ }
+ }
+
+ return 0;
+}
+
+int sparx5_qos_init(struct sparx5 *sparx5)
+{
+ int ret;
+
+ ret = sparx5_leak_groups_init(sparx5);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
int sparx5_tc_mqprio_add(struct net_device *ndev, u8 num_tc)
{
@@ -36,3 +392,49 @@ int sparx5_tc_mqprio_del(struct net_device *ndev)
return 0;
}
+
+int sparx5_tc_tbf_add(struct sparx5_port *port,
+ struct tc_tbf_qopt_offload_replace_params *params,
+ u32 layer, u32 idx)
+{
+ struct sparx5_shaper sh = {
+ .mode = SPX5_SE_MODE_DATARATE,
+ .rate = div_u64(params->rate.rate_bytes_ps, 1000) * 8,
+ .burst = params->max_size,
+ };
+ struct sparx5_lg *lg;
+ u32 group;
+
+ /* Find suitable group for this se */
+ if (sparx5_lg_get_group_by_rate(layer, sh.rate, &group) < 0) {
+ pr_debug("Could not find leak group for se with rate: %d",
+ sh.rate);
+ return -EINVAL;
+ }
+
+ lg = &layers[layer].leak_groups[group];
+
+ pr_debug("Found matching group (speed: %d)\n", lg->max_rate);
+
+ if (sh.rate < SPX5_SE_RATE_MIN || sh.burst < SPX5_SE_BURST_MIN)
+ return -EINVAL;
+
+ /* Calculate committed rate and burst */
+ sh.rate = DIV_ROUND_UP(sh.rate, lg->resolution);
+ sh.burst = DIV_ROUND_UP(sh.burst, SPX5_SE_BURST_UNIT);
+
+ if (sh.rate > SPX5_SE_RATE_MAX || sh.burst > SPX5_SE_BURST_MAX)
+ return -EINVAL;
+
+ return sparx5_shaper_conf_set(port, &sh, layer, idx, group);
+}
+
+int sparx5_tc_tbf_del(struct sparx5_port *port, u32 layer, u32 idx)
+{
+ struct sparx5_shaper sh = {0};
+ u32 group;
+
+ sparx5_lg_get_group_by_index(port->sparx5, layer, idx, &group);
+
+ return sparx5_shaper_conf_set(port, &sh, layer, idx, group);
+}
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_qos.h b/drivers/net/ethernet/microchip/sparx5/sparx5_qos.h
index 0572fb41c949..49662ad86018 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_qos.h
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_qos.h
@@ -9,8 +9,59 @@
#include <linux/netdevice.h>
+/* Number of Layers */
+#define SPX5_HSCH_LAYER_CNT 3
+
+/* Scheduling elements per layer */
+#define SPX5_HSCH_L0_SE_CNT 5040
+#define SPX5_HSCH_L1_SE_CNT 64
+#define SPX5_HSCH_L2_SE_CNT 64
+
+/* Calculate Layer 0 Scheduler Element when using normal hierarchy */
+#define SPX5_HSCH_L0_GET_IDX(port, queue) ((64 * (port)) + (8 * (queue)))
+
+/* Number of leak groups */
+#define SPX5_HSCH_LEAK_GRP_CNT 4
+
+/* Scheduler modes */
+#define SPX5_SE_MODE_LINERATE 0
+#define SPX5_SE_MODE_DATARATE 1
+
+/* Rate and burst */
+#define SPX5_SE_RATE_MAX 262143
+#define SPX5_SE_BURST_MAX 127
+#define SPX5_SE_RATE_MIN 1
+#define SPX5_SE_BURST_MIN 1
+#define SPX5_SE_BURST_UNIT 4096
+
+struct sparx5_shaper {
+ u32 mode;
+ u32 rate;
+ u32 burst;
+};
+
+struct sparx5_lg {
+ u32 max_rate;
+ u32 resolution;
+ u32 leak_time;
+ u32 max_ses;
+};
+
+struct sparx5_layer {
+ struct sparx5_lg leak_groups[SPX5_HSCH_LEAK_GRP_CNT];
+};
+
+int sparx5_qos_init(struct sparx5 *sparx5);
+
/* Multi-Queue Priority */
int sparx5_tc_mqprio_add(struct net_device *ndev, u8 num_tc);
int sparx5_tc_mqprio_del(struct net_device *ndev);
+/* Token Bucket Filter */
+struct tc_tbf_qopt_offload_replace_params;
+int sparx5_tc_tbf_add(struct sparx5_port *port,
+ struct tc_tbf_qopt_offload_replace_params *params,
+ u32 layer, u32 idx);
+int sparx5_tc_tbf_del(struct sparx5_port *port, u32 layer, u32 idx);
+
#endif /* __SPARX5_QOS_H__ */
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
index 6e01a7c7c821..42b102009e7e 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
@@ -10,6 +10,19 @@
#include "sparx5_main.h"
#include "sparx5_qos.h"
+static void sparx5_tc_get_layer_and_idx(u32 parent, u32 portno, u32 *layer,
+ u32 *idx)
+{
+ if (parent == TC_H_ROOT) {
+ *layer = 2;
+ *idx = portno;
+ } else {
+ u32 queue = TC_H_MIN(parent) - 1;
+ *layer = 0;
+ *idx = SPX5_HSCH_L0_GET_IDX(portno, queue);
+ }
+}
+
static int sparx5_tc_setup_qdisc_mqprio(struct net_device *ndev,
struct tc_mqprio_qopt_offload *m)
{
@@ -21,12 +34,38 @@ static int sparx5_tc_setup_qdisc_mqprio(struct net_device *ndev,
return sparx5_tc_mqprio_add(ndev, m->qopt.num_tc);
}
+static int sparx5_tc_setup_qdisc_tbf(struct net_device *ndev,
+ struct tc_tbf_qopt_offload *qopt)
+{
+ struct sparx5_port *port = netdev_priv(ndev);
+ u32 layer, se_idx;
+
+ sparx5_tc_get_layer_and_idx(qopt->parent, port->portno, &layer,
+ &se_idx);
+
+ switch (qopt->command) {
+ case TC_TBF_REPLACE:
+ return sparx5_tc_tbf_add(port, &qopt->replace_params, layer,
+ se_idx);
+ case TC_TBF_DESTROY:
+ return sparx5_tc_tbf_del(port, layer, se_idx);
+ case TC_TBF_STATS:
+ return -EOPNOTSUPP;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return -EOPNOTSUPP;
+}
+
int sparx5_port_setup_tc(struct net_device *ndev, enum tc_setup_type type,
void *type_data)
{
switch (type) {
case TC_SETUP_QDISC_MQPRIO:
return sparx5_tc_setup_qdisc_mqprio(ndev, type_data);
+ case TC_SETUP_QDISC_TBF:
+ return sparx5_tc_setup_qdisc_tbf(ndev, type_data);
default:
return -EOPNOTSUPP;
}
--
2.34.1
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