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net/mlx5e: PFC stall prevention support

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Implement set/get functions to configure PFC stall prevention
timeout by tunables api through ethtool.
By default the stall prevention timeout is configured to 8 sec.
Timeout range is: 80-8000 msec.

Enabling stall prevention with the auto timeout will set
the timeout to 100 msec.

Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Inbar Karmy
2017-11-20 18:06:20 +02:00
committed by Saeed Mahameed
parent e1577c1c88
commit 2afa609f5c
4 changed files with 132 additions and 12 deletions
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17
include/linux/mlx5/mlx5_ifc.h
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@@ -7833,7 +7833,11 @@ struct mlx5_ifc_pifr_reg_bits {
struct mlx5_ifc_pfcc_reg_bits {
u8 reserved_at_0[0x8];
u8 local_port[0x8];
u8 reserved_at_10[0x10];
u8 reserved_at_10[0xb];
u8 ppan_mask_n[0x1];
u8 minor_stall_mask[0x1];
u8 critical_stall_mask[0x1];
u8 reserved_at_1e[0x2];
u8 ppan[0x4];
u8 reserved_at_24[0x4];
@@ -7843,17 +7847,22 @@ struct mlx5_ifc_pfcc_reg_bits {
u8 pptx[0x1];
u8 aptx[0x1];
u8 reserved_at_42[0x6];
u8 pptx_mask_n[0x1];
u8 reserved_at_43[0x5];
u8 pfctx[0x8];
u8 reserved_at_50[0x10];
u8 pprx[0x1];
u8 aprx[0x1];
u8 reserved_at_62[0x6];
u8 pprx_mask_n[0x1];
u8 reserved_at_63[0x5];
u8 pfcrx[0x8];
u8 reserved_at_70[0x10];
u8 reserved_at_80[0x80];
u8 device_stall_minor_watermark[0x10];
u8 device_stall_critical_watermark[0x10];
u8 reserved_at_a0[0x60];
};
struct mlx5_ifc_pelc_reg_bits {