From: Gal Pressman <gal@nvidia.com>
MLX5E_100MB and MLX5E_1GB defines are confusing, MLX5E_100MB is not
equal to 100 * MEGA, and MLX5E_1GB is not equal to one GIGA, as they
hide the Kbps rate conversion required for ieee_maxrate.
Replace hardcoded bandwidth conversion values with standard unit
definitions from linux/units.h. Rename MLX5E_100MB/MLX5E_1GB to
MLX5E_100MB_TO_KB/MLX5E_1GB_TO_KB to clarify these are conversion
factors to Kbps, not absolute bandwidth values.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
.../net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 79f9d43b09b3..fddf7c207f8e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -31,14 +31,15 @@
*/
#include <linux/device.h>
#include <linux/netdevice.h>
+#include <linux/units.h>
#include "en.h"
#include "en/port.h"
#include "en/port_buffer.h"
#define MLX5E_MAX_BW_ALLOC 100 /* Max percentage of BW allocation */
-#define MLX5E_100MB (100000)
-#define MLX5E_1GB (1000000)
+#define MLX5E_100MB_TO_KB (100 * MEGA / KILO)
+#define MLX5E_1GB_TO_KB (GIGA / KILO)
#define MLX5E_CEE_STATE_UP 1
#define MLX5E_CEE_STATE_DOWN 0
@@ -572,10 +573,10 @@ static int mlx5e_dcbnl_ieee_getmaxrate(struct net_device *netdev,
for (i = 0; i <= mlx5_max_tc(mdev); i++) {
switch (max_bw_unit[i]) {
case MLX5_100_MBPS_UNIT:
- maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_100MB;
+ maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_100MB_TO_KB;
break;
case MLX5_GBPS_UNIT:
- maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_1GB;
+ maxrate->tc_maxrate[i] = max_bw_value[i] * MLX5E_1GB_TO_KB;
break;
case MLX5_BW_NO_LIMIT:
break;
@@ -614,8 +615,8 @@ static int mlx5e_dcbnl_ieee_setmaxrate(struct net_device *netdev,
memset(max_bw_value, 0, sizeof(max_bw_value));
memset(max_bw_unit, 0, sizeof(max_bw_unit));
- upper_limit_100mbps = U8_MAX * MLX5E_100MB;
- upper_limit_gbps = U8_MAX * MLX5E_1GB;
+ upper_limit_100mbps = U8_MAX * MLX5E_100MB_TO_KB;
+ upper_limit_gbps = U8_MAX * MLX5E_1GB_TO_KB;
for (i = 0; i <= mlx5_max_tc(mdev); i++) {
if (!maxrate->tc_maxrate[i]) {
@@ -624,12 +625,12 @@ static int mlx5e_dcbnl_ieee_setmaxrate(struct net_device *netdev,
}
if (maxrate->tc_maxrate[i] <= upper_limit_100mbps) {
max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
- MLX5E_100MB);
+ MLX5E_100MB_TO_KB);
max_bw_value[i] = max_bw_value[i] ? max_bw_value[i] : 1;
max_bw_unit[i] = MLX5_100_MBPS_UNIT;
} else if (maxrate->tc_maxrate[i] <= upper_limit_gbps) {
max_bw_value[i] = div_u64(maxrate->tc_maxrate[i],
- MLX5E_1GB);
+ MLX5E_1GB_TO_KB);
max_bw_unit[i] = MLX5_GBPS_UNIT;
} else {
netdev_err(netdev,
--
2.31.1