lkml.org 
[lkml]   [2022]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 33/54] net: ethernet: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} for mellanox
Date
Mellanox code uses bitmap_weight() to compare the weight of bitmap with
a given number. We can do it more efficiently with bitmap_weight_{eq, ...}
because conditional bitmap_weight may stop traversing the bitmap earlier,
as soon as condition is met.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
drivers/net/ethernet/mellanox/mlx4/cmd.c | 10 +++-------
drivers/net/ethernet/mellanox/mlx4/eq.c | 4 ++--
drivers/net/ethernet/mellanox/mlx4/fw.c | 4 ++--
drivers/net/ethernet/mellanox/mlx4/main.c | 2 +-
4 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index c56d2194cbfc..5bca0c68f00a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -2792,9 +2792,8 @@ int mlx4_slave_convert_port(struct mlx4_dev *dev, int slave, int port)
{
unsigned n;
struct mlx4_active_ports actv_ports = mlx4_get_active_ports(dev, slave);
- unsigned m = bitmap_weight(actv_ports.ports, dev->caps.num_ports);

- if (port <= 0 || port > m)
+ if (port <= 0 || bitmap_weight_lt(actv_ports.ports, dev->caps.num_ports, port))
return -EINVAL;

n = find_first_bit(actv_ports.ports, dev->caps.num_ports);
@@ -3404,10 +3403,6 @@ int mlx4_vf_set_enable_smi_admin(struct mlx4_dev *dev, int slave, int port,
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_active_ports actv_ports = mlx4_get_active_ports(
&priv->dev, slave);
- int min_port = find_first_bit(actv_ports.ports,
- priv->dev.caps.num_ports) + 1;
- int max_port = min_port - 1 +
- bitmap_weight(actv_ports.ports, priv->dev.caps.num_ports);

if (slave == mlx4_master_func_num(dev))
return 0;
@@ -3417,7 +3412,8 @@ int mlx4_vf_set_enable_smi_admin(struct mlx4_dev *dev, int slave, int port,
enabled < 0 || enabled > 1)
return -EINVAL;

- if (min_port == max_port && dev->caps.num_ports > 1) {
+ if (dev->caps.num_ports > 1 &&
+ bitmap_weight_eq(actv_ports.ports, priv->dev.caps.num_ports, 1)) {
mlx4_info(dev, "SMI access disallowed for single ported VFs\n");
return -EPROTONOSUPPORT;
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 414e390e6b48..0c09432ff389 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -1435,8 +1435,8 @@ int mlx4_is_eq_shared(struct mlx4_dev *dev, int vector)
if (vector <= 0 || (vector >= dev->caps.num_comp_vectors + 1))
return -EINVAL;

- return !!(bitmap_weight(priv->eq_table.eq[vector].actv_ports.ports,
- dev->caps.num_ports) > 1);
+ return bitmap_weight_gt(priv->eq_table.eq[vector].actv_ports.ports,
+ dev->caps.num_ports, 1);
}
EXPORT_SYMBOL(mlx4_is_eq_shared);

diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 42c96c9d7fb1..855aae326ccb 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -1300,8 +1300,8 @@ int mlx4_QUERY_DEV_CAP_wrapper(struct mlx4_dev *dev, int slave,
actv_ports = mlx4_get_active_ports(dev, slave);
first_port = find_first_bit(actv_ports.ports, dev->caps.num_ports);
for (slave_port = 0, real_port = first_port;
- real_port < first_port +
- bitmap_weight(actv_ports.ports, dev->caps.num_ports);
+ bitmap_weight_gt(actv_ports.ports, dev->caps.num_ports,
+ real_port - first_port);
++real_port, ++slave_port) {
if (flags & (MLX4_DEV_CAP_FLAG_WOL_PORT1 << real_port))
flags |= MLX4_DEV_CAP_FLAG_WOL_PORT1 << slave_port;
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index b187c210d4d6..cfbaa7ac712f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1383,7 +1383,7 @@ static int mlx4_mf_bond(struct mlx4_dev *dev)
dev->persist->num_vfs + 1);

/* only single port vfs are allowed */
- if (bitmap_weight(slaves_port_1_2, dev->persist->num_vfs + 1) > 1) {
+ if (bitmap_weight_gt(slaves_port_1_2, dev->persist->num_vfs + 1, 1)) {
mlx4_warn(dev, "HA mode unsupported for dual ported VFs\n");
return -EINVAL;
}
--
2.30.2
\
 
 \ /
  Last update: 2022-01-23 19:43    [W:0.286 / U:0.676 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site