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Message-ID: <20241013064540.170722-9-tariqt@nvidia.com>
Date: Sun, 13 Oct 2024 09:45:33 +0300
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, <cjubran@...dia.com>,
<cratiu@...dia.com>, Tariq Toukan <tariqt@...dia.com>
Subject: [PATCH net-next 08/15] net/mlx5: Refactor vport QoS to use scheduling node structure
From: Carolina Jubran <cjubran@...dia.com>
Refactor the vport QoS structure by moving group membership and
scheduling details into the `mlx5_esw_sched_node` structure.
This change consolidates the vport into the rate hierarchy by unifying
the handling of different types of scheduling element nodes.
In addition, add a direct reference to the mlx5_vport within the
mlx5_esw_sched_node structure, to ensure that the vport is easily
accessible when a scheduling node is associated with a vport.
Signed-off-by: Carolina Jubran <cjubran@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
.../mlx5/core/esw/diag/qos_tracepoint.h | 7 +-
.../net/ethernet/mellanox/mlx5/core/esw/qos.c | 146 ++++++++++++------
.../net/ethernet/mellanox/mlx5/core/esw/qos.h | 3 +
.../net/ethernet/mellanox/mlx5/core/eswitch.c | 2 +
.../net/ethernet/mellanox/mlx5/core/eswitch.h | 11 +-
5 files changed, 106 insertions(+), 63 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/diag/qos_tracepoint.h b/drivers/net/ethernet/mellanox/mlx5/core/esw/diag/qos_tracepoint.h
index 0b50ef0871f2..43550a416a6f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/diag/qos_tracepoint.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/diag/qos_tracepoint.h
@@ -9,6 +9,7 @@
#include <linux/tracepoint.h>
#include "eswitch.h"
+#include "qos.h"
TRACE_EVENT(mlx5_esw_vport_qos_destroy,
TP_PROTO(const struct mlx5_core_dev *dev, const struct mlx5_vport *vport),
@@ -19,7 +20,7 @@ TRACE_EVENT(mlx5_esw_vport_qos_destroy,
),
TP_fast_assign(__assign_str(devname);
__entry->vport_id = vport->vport;
- __entry->sched_elem_ix = vport->qos.esw_sched_elem_ix;
+ __entry->sched_elem_ix = mlx5_esw_qos_vport_get_sched_elem_ix(vport);
),
TP_printk("(%s) vport=%hu sched_elem_ix=%u\n",
__get_str(devname), __entry->vport_id, __entry->sched_elem_ix
@@ -39,10 +40,10 @@ DECLARE_EVENT_CLASS(mlx5_esw_vport_qos_template,
),
TP_fast_assign(__assign_str(devname);
__entry->vport_id = vport->vport;
- __entry->sched_elem_ix = vport->qos.esw_sched_elem_ix;
+ __entry->sched_elem_ix = mlx5_esw_qos_vport_get_sched_elem_ix(vport);
__entry->bw_share = bw_share;
__entry->max_rate = max_rate;
- __entry->parent = vport->qos.parent;
+ __entry->parent = mlx5_esw_qos_vport_get_parent(vport);
),
TP_printk("(%s) vport=%hu sched_elem_ix=%u bw_share=%u, max_rate=%u parent=%p\n",
__get_str(devname), __entry->vport_id, __entry->sched_elem_ix,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
index d2bdf04421b0..571f7c797968 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
@@ -63,6 +63,7 @@ static void esw_qos_domain_release(struct mlx5_eswitch *esw)
enum sched_node_type {
SCHED_NODE_TYPE_VPORTS_TSAR,
+ SCHED_NODE_TYPE_VPORT,
};
struct mlx5_esw_sched_node {
@@ -82,13 +83,34 @@ struct mlx5_esw_sched_node {
struct mlx5_eswitch *esw;
/* The children nodes of this node, empty list for leaf nodes. */
struct list_head children;
+ /* Valid only if this node is associated with a vport. */
+ struct mlx5_vport *vport;
};
-static void esw_qos_vport_set_parent(struct mlx5_vport *vport, struct mlx5_esw_sched_node *parent)
+static void
+esw_qos_node_set_parent(struct mlx5_esw_sched_node *node, struct mlx5_esw_sched_node *parent)
+{
+ list_del_init(&node->entry);
+ node->parent = parent;
+ list_add_tail(&node->entry, &parent->children);
+ node->esw = parent->esw;
+}
+
+u32 mlx5_esw_qos_vport_get_sched_elem_ix(const struct mlx5_vport *vport)
+{
+ if (!vport->qos.sched_node)
+ return 0;
+
+ return vport->qos.sched_node->ix;
+}
+
+struct mlx5_esw_sched_node *
+mlx5_esw_qos_vport_get_parent(const struct mlx5_vport *vport)
{
- list_del_init(&vport->qos.parent_entry);
- vport->qos.parent = parent;
- list_add_tail(&vport->qos.parent_entry, &parent->children);
+ if (!vport->qos.sched_node)
+ return 0;
+
+ return vport->qos.sched_node->parent;
}
static int esw_qos_sched_elem_config(struct mlx5_core_dev *dev, u32 sched_elem_ix,
@@ -131,10 +153,11 @@ static int esw_qos_vport_config(struct mlx5_vport *vport,
u32 max_rate, u32 bw_share,
struct netlink_ext_ack *extack)
{
- struct mlx5_core_dev *dev = vport->qos.parent->esw->dev;
+ struct mlx5_esw_sched_node *vport_node = vport->qos.sched_node;
+ struct mlx5_core_dev *dev = vport_node->parent->esw->dev;
int err;
- err = esw_qos_sched_elem_config(dev, vport->qos.esw_sched_elem_ix, max_rate, bw_share);
+ err = esw_qos_sched_elem_config(dev, vport_node->ix, max_rate, bw_share);
if (err) {
esw_warn(dev,
"E-Switch modify vport scheduling element failed (vport=%d,err=%d)\n",
@@ -151,15 +174,15 @@ static int esw_qos_vport_config(struct mlx5_vport *vport,
static u32 esw_qos_calculate_node_min_rate_divider(struct mlx5_esw_sched_node *node)
{
u32 fw_max_bw_share = MLX5_CAP_QOS(node->esw->dev, max_tsar_bw_share);
- struct mlx5_vport *vport;
+ struct mlx5_esw_sched_node *vport_node;
u32 max_guarantee = 0;
/* Find max min_rate across all vports in this node.
* This will correspond to fw_max_bw_share in the final bw_share calculation.
*/
- list_for_each_entry(vport, &node->children, qos.parent_entry) {
- if (vport->qos.min_rate > max_guarantee)
- max_guarantee = vport->qos.min_rate;
+ list_for_each_entry(vport_node, &node->children, entry) {
+ if (vport_node->min_rate > max_guarantee)
+ max_guarantee = vport_node->min_rate;
}
if (max_guarantee)
@@ -213,21 +236,22 @@ static int esw_qos_normalize_node_min_rate(struct mlx5_esw_sched_node *node,
{
u32 fw_max_bw_share = MLX5_CAP_QOS(node->esw->dev, max_tsar_bw_share);
u32 divider = esw_qos_calculate_node_min_rate_divider(node);
- struct mlx5_vport *vport;
+ struct mlx5_esw_sched_node *vport_node;
u32 bw_share;
int err;
- list_for_each_entry(vport, &node->children, qos.parent_entry) {
- bw_share = esw_qos_calc_bw_share(vport->qos.min_rate, divider, fw_max_bw_share);
+ list_for_each_entry(vport_node, &node->children, entry) {
+ bw_share = esw_qos_calc_bw_share(vport_node->min_rate, divider, fw_max_bw_share);
- if (bw_share == vport->qos.bw_share)
+ if (bw_share == vport_node->bw_share)
continue;
- err = esw_qos_vport_config(vport, vport->qos.max_rate, bw_share, extack);
+ err = esw_qos_vport_config(vport_node->vport, vport_node->max_rate, bw_share,
+ extack);
if (err)
return err;
- vport->qos.bw_share = bw_share;
+ vport_node->bw_share = bw_share;
}
return 0;
@@ -271,6 +295,7 @@ static int esw_qos_normalize_min_rate(struct mlx5_eswitch *esw, struct netlink_e
static int esw_qos_set_vport_min_rate(struct mlx5_vport *vport,
u32 min_rate, struct netlink_ext_ack *extack)
{
+ struct mlx5_esw_sched_node *vport_node = vport->qos.sched_node;
struct mlx5_eswitch *esw = vport->dev->priv.eswitch;
u32 fw_max_bw_share, previous_min_rate;
bool min_rate_supported;
@@ -282,14 +307,14 @@ static int esw_qos_set_vport_min_rate(struct mlx5_vport *vport,
fw_max_bw_share >= MLX5_MIN_BW_SHARE;
if (min_rate && !min_rate_supported)
return -EOPNOTSUPP;
- if (min_rate == vport->qos.min_rate)
+ if (min_rate == vport_node->min_rate)
return 0;
- previous_min_rate = vport->qos.min_rate;
- vport->qos.min_rate = min_rate;
- err = esw_qos_normalize_node_min_rate(vport->qos.parent, extack);
+ previous_min_rate = vport_node->min_rate;
+ vport_node->min_rate = min_rate;
+ err = esw_qos_normalize_node_min_rate(vport_node->parent, extack);
if (err)
- vport->qos.min_rate = previous_min_rate;
+ vport_node->min_rate = previous_min_rate;
return err;
}
@@ -297,6 +322,7 @@ static int esw_qos_set_vport_min_rate(struct mlx5_vport *vport,
static int esw_qos_set_vport_max_rate(struct mlx5_vport *vport,
u32 max_rate, struct netlink_ext_ack *extack)
{
+ struct mlx5_esw_sched_node *vport_node = vport->qos.sched_node;
struct mlx5_eswitch *esw = vport->dev->priv.eswitch;
u32 act_max_rate = max_rate;
bool max_rate_supported;
@@ -307,17 +333,17 @@ static int esw_qos_set_vport_max_rate(struct mlx5_vport *vport,
if (max_rate && !max_rate_supported)
return -EOPNOTSUPP;
- if (max_rate == vport->qos.max_rate)
+ if (max_rate == vport_node->max_rate)
return 0;
/* Use parent node limit if new max rate is 0. */
if (!max_rate)
- act_max_rate = vport->qos.parent->max_rate;
+ act_max_rate = vport_node->parent->max_rate;
- err = esw_qos_vport_config(vport, act_max_rate, vport->qos.bw_share, extack);
+ err = esw_qos_vport_config(vport, act_max_rate, vport_node->bw_share, extack);
if (!err)
- vport->qos.max_rate = max_rate;
+ vport_node->max_rate = max_rate;
return err;
}
@@ -354,7 +380,7 @@ static int esw_qos_set_node_min_rate(struct mlx5_esw_sched_node *node,
static int esw_qos_set_node_max_rate(struct mlx5_esw_sched_node *node,
u32 max_rate, struct netlink_ext_ack *extack)
{
- struct mlx5_vport *vport;
+ struct mlx5_esw_sched_node *vport_node;
int err;
if (node->max_rate == max_rate)
@@ -367,11 +393,12 @@ static int esw_qos_set_node_max_rate(struct mlx5_esw_sched_node *node,
node->max_rate = max_rate;
/* Any unlimited vports in the node should be set with the value of the node. */
- list_for_each_entry(vport, &node->children, qos.parent_entry) {
- if (vport->qos.max_rate)
+ list_for_each_entry(vport_node, &node->children, entry) {
+ if (vport_node->max_rate)
continue;
- err = esw_qos_vport_config(vport, max_rate, vport->qos.bw_share, extack);
+ err = esw_qos_vport_config(vport_node->vport, max_rate, vport_node->bw_share,
+ extack);
if (err)
NL_SET_ERR_MSG_MOD(extack,
"E-Switch vport implicit rate limit setting failed");
@@ -448,34 +475,37 @@ static int esw_qos_update_node_scheduling_element(struct mlx5_vport *vport,
struct mlx5_esw_sched_node *new_node,
struct netlink_ext_ack *extack)
{
+ struct mlx5_esw_sched_node *vport_node = vport->qos.sched_node;
u32 max_rate;
int err;
err = mlx5_destroy_scheduling_element_cmd(curr_node->esw->dev,
SCHEDULING_HIERARCHY_E_SWITCH,
- vport->qos.esw_sched_elem_ix);
+ vport_node->ix);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "E-Switch destroy vport scheduling element failed");
return err;
}
/* Use new node max rate if vport max rate is unlimited. */
- max_rate = vport->qos.max_rate ? vport->qos.max_rate : new_node->max_rate;
- err = esw_qos_vport_create_sched_element(vport, new_node, max_rate, vport->qos.bw_share,
- &vport->qos.esw_sched_elem_ix);
+ max_rate = vport_node->max_rate ? vport_node->max_rate : new_node->max_rate;
+ err = esw_qos_vport_create_sched_element(vport, new_node, max_rate,
+ vport_node->bw_share,
+ &vport_node->ix);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "E-Switch vport node set failed.");
goto err_sched;
}
- esw_qos_vport_set_parent(vport, new_node);
+ esw_qos_node_set_parent(vport->qos.sched_node, new_node);
return 0;
err_sched:
- max_rate = vport->qos.max_rate ? vport->qos.max_rate : curr_node->max_rate;
- if (esw_qos_vport_create_sched_element(vport, curr_node, max_rate, vport->qos.bw_share,
- &vport->qos.esw_sched_elem_ix))
+ max_rate = vport_node->max_rate ? vport_node->max_rate : curr_node->max_rate;
+ if (esw_qos_vport_create_sched_element(vport, curr_node, max_rate,
+ vport_node->bw_share,
+ &vport_node->ix))
esw_warn(curr_node->esw->dev, "E-Switch vport node restore failed (vport=%d)\n",
vport->vport);
@@ -486,12 +516,13 @@ static int esw_qos_vport_update_node(struct mlx5_vport *vport,
struct mlx5_esw_sched_node *node,
struct netlink_ext_ack *extack)
{
+ struct mlx5_esw_sched_node *vport_node = vport->qos.sched_node;
struct mlx5_eswitch *esw = vport->dev->priv.eswitch;
struct mlx5_esw_sched_node *new_node, *curr_node;
int err;
esw_assert_qos_lock_held(esw);
- curr_node = vport->qos.parent;
+ curr_node = vport_node->parent;
new_node = node ?: esw->qos.node0;
if (curr_node == new_node)
return 0;
@@ -501,7 +532,7 @@ static int esw_qos_vport_update_node(struct mlx5_vport *vport,
return err;
/* Recalculate bw share weights of old and new nodes */
- if (vport->qos.bw_share || new_node->bw_share) {
+ if (vport_node->bw_share || new_node->bw_share) {
esw_qos_normalize_node_min_rate(curr_node, extack);
esw_qos_normalize_node_min_rate(new_node, extack);
}
@@ -707,6 +738,7 @@ static int esw_qos_vport_enable(struct mlx5_vport *vport,
u32 max_rate, u32 bw_share, struct netlink_ext_ack *extack)
{
struct mlx5_eswitch *esw = vport->dev->priv.eswitch;
+ u32 sched_elem_ix;
int err;
esw_assert_qos_lock_held(esw);
@@ -718,18 +750,26 @@ static int esw_qos_vport_enable(struct mlx5_vport *vport,
return err;
err = esw_qos_vport_create_sched_element(vport, esw->qos.node0, max_rate, bw_share,
- &vport->qos.esw_sched_elem_ix);
+ &sched_elem_ix);
if (err)
goto err_out;
- INIT_LIST_HEAD(&vport->qos.parent_entry);
- esw_qos_vport_set_parent(vport, esw->qos.node0);
+ vport->qos.sched_node = __esw_qos_alloc_rate_node(esw, sched_elem_ix, SCHED_NODE_TYPE_VPORT,
+ esw->qos.node0);
+ if (!vport->qos.sched_node)
+ goto err_alloc;
vport->qos.enabled = true;
+ vport->qos.sched_node->vport = vport;
+
trace_mlx5_esw_vport_qos_create(vport->dev, vport, bw_share, max_rate);
return 0;
+err_alloc:
+ if (mlx5_destroy_scheduling_element_cmd(esw->dev,
+ SCHEDULING_HIERARCHY_E_SWITCH, sched_elem_ix))
+ esw_warn(esw->dev, "E-Switch destroy vport scheduling element failed.\n");
err_out:
esw_qos_put(esw);
@@ -739,6 +779,7 @@ static int esw_qos_vport_enable(struct mlx5_vport *vport,
void mlx5_esw_qos_vport_disable(struct mlx5_vport *vport)
{
struct mlx5_eswitch *esw = vport->dev->priv.eswitch;
+ struct mlx5_esw_sched_node *vport_node;
struct mlx5_core_dev *dev;
int err;
@@ -746,20 +787,23 @@ void mlx5_esw_qos_vport_disable(struct mlx5_vport *vport)
esw_qos_lock(esw);
if (!vport->qos.enabled)
goto unlock;
- WARN(vport->qos.parent != esw->qos.node0,
+ vport_node = vport->qos.sched_node;
+ WARN(vport_node->parent != esw->qos.node0,
"Disabling QoS on port before detaching it from node");
- dev = vport->qos.parent->esw->dev;
+ trace_mlx5_esw_vport_qos_destroy(dev, vport);
+
+ dev = vport_node->esw->dev;
err = mlx5_destroy_scheduling_element_cmd(dev,
SCHEDULING_HIERARCHY_E_SWITCH,
- vport->qos.esw_sched_elem_ix);
+ vport_node->ix);
if (err)
esw_warn(dev,
"E-Switch destroy vport scheduling element failed (vport=%d,err=%d)\n",
vport->vport, err);
+ __esw_qos_free_node(vport_node);
memset(&vport->qos, 0, sizeof(vport->qos));
- trace_mlx5_esw_vport_qos_destroy(dev, vport);
esw_qos_put(esw);
unlock:
@@ -792,8 +836,8 @@ bool mlx5_esw_qos_get_vport_rate(struct mlx5_vport *vport, u32 *max_rate, u32 *m
esw_qos_lock(esw);
enabled = vport->qos.enabled;
if (enabled) {
- *max_rate = vport->qos.max_rate;
- *min_rate = vport->qos.min_rate;
+ *max_rate = vport->qos.sched_node->max_rate;
+ *min_rate = vport->qos.sched_node->min_rate;
}
esw_qos_unlock(esw);
return enabled;
@@ -889,16 +933,16 @@ int mlx5_esw_qos_modify_vport_rate(struct mlx5_eswitch *esw, u16 vport_num, u32
esw_qos_lock(esw);
if (!vport->qos.enabled) {
/* Eswitch QoS wasn't enabled yet. Enable it and vport QoS. */
- err = esw_qos_vport_enable(vport, rate_mbps, vport->qos.bw_share, NULL);
+ err = esw_qos_vport_enable(vport, rate_mbps, vport->qos.sched_node->bw_share, NULL);
} else {
- struct mlx5_core_dev *dev = vport->qos.parent->esw->dev;
+ struct mlx5_core_dev *dev = vport->qos.sched_node->parent->esw->dev;
MLX5_SET(scheduling_context, ctx, max_average_bw, rate_mbps);
bitmask = MODIFY_SCHEDULING_ELEMENT_IN_MODIFY_BITMASK_MAX_AVERAGE_BW;
err = mlx5_modify_scheduling_element_cmd(dev,
SCHEDULING_HIERARCHY_E_SWITCH,
ctx,
- vport->qos.esw_sched_elem_ix,
+ vport->qos.sched_node->ix,
bitmask);
}
esw_qos_unlock(esw);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.h b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.h
index b4045efbaf9e..61a6fdd5c267 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.h
@@ -13,6 +13,9 @@ int mlx5_esw_qos_set_vport_rate(struct mlx5_vport *evport, u32 max_rate, u32 min
bool mlx5_esw_qos_get_vport_rate(struct mlx5_vport *vport, u32 *max_rate, u32 *min_rate);
void mlx5_esw_qos_vport_disable(struct mlx5_vport *vport);
+u32 mlx5_esw_qos_vport_get_sched_elem_ix(const struct mlx5_vport *vport);
+struct mlx5_esw_sched_node *mlx5_esw_qos_vport_get_parent(const struct mlx5_vport *vport);
+
int mlx5_esw_devlink_rate_leaf_tx_share_set(struct devlink_rate *rate_leaf, void *priv,
u64 tx_share, struct netlink_ext_ack *extack);
int mlx5_esw_devlink_rate_leaf_tx_max_set(struct devlink_rate *rate_leaf, void *priv,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 2bcd42305f46..09719e9b8611 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -1061,6 +1061,7 @@ static void mlx5_eswitch_clear_vf_vports_info(struct mlx5_eswitch *esw)
unsigned long i;
mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs) {
+ kfree(vport->qos.sched_node);
memset(&vport->qos, 0, sizeof(vport->qos));
memset(&vport->info, 0, sizeof(vport->info));
vport->info.link_state = MLX5_VPORT_ADMIN_STATE_AUTO;
@@ -1073,6 +1074,7 @@ static void mlx5_eswitch_clear_ec_vf_vports_info(struct mlx5_eswitch *esw)
unsigned long i;
mlx5_esw_for_each_ec_vf_vport(esw, i, vport, esw->esw_funcs.num_ec_vfs) {
+ kfree(vport->qos.sched_node);
memset(&vport->qos, 0, sizeof(vport->qos));
memset(&vport->info, 0, sizeof(vport->info));
vport->info.link_state = MLX5_VPORT_ADMIN_STATE_AUTO;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 38f912f5a707..e77ec82787de 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -216,15 +216,8 @@ struct mlx5_vport {
struct {
/* Initially false, set to true whenever any QoS features are used. */
bool enabled;
- u32 esw_sched_elem_ix;
- u32 min_rate;
- u32 max_rate;
- /* A computed value indicating relative min_rate between vports in a group. */
- u32 bw_share;
- /* The parent group of this vport scheduling element. */
- struct mlx5_esw_sched_node *parent;
- /* Membership in the parent 'members' list. */
- struct list_head parent_entry;
+ /* Vport scheduling element node. */
+ struct mlx5_esw_sched_node *sched_node;
} qos;
u16 vport;
--
2.44.0
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