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net/mlx5: Add Fast teardown support

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Today mlx5 devices support two teardown modes:
1- Regular teardown
2- Force teardown

This change introduces the enhanced version of the "Force teardown" that
allows SW to perform teardown in a faster way without the need to reclaim
all the pages.

Fast teardown provides the following advantages:
1- Fix a FW race condition that could cause command timeout
2- Avoid moving to polling mode
3- Close the vport to prevent PCI ACK to be sent without been scatter
to memory

Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Feras Daoud
2018-08-09 09:55:21 +03:00
committed by Saeed Mahameed
parent 94563847a8
commit fcd29ad17c
6 changed files with 104 additions and 24 deletions
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6
include/linux/mlx5/mlx5_ifc.h
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@@ -896,7 +896,8 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 log_max_mkey[0x6];
u8 reserved_at_f0[0x8];
u8 dump_fill_mkey[0x1];
u8 reserved_at_f9[0x3];
u8 reserved_at_f9[0x2];
u8 fast_teardown[0x1];
u8 log_max_eq[0x4];
u8 max_indirection[0x8];
@@ -3352,12 +3353,13 @@ struct mlx5_ifc_teardown_hca_out_bits {
u8 reserved_at_40[0x3f];
u8 force_state[0x1];
u8 state[0x1];
};
enum {
MLX5_TEARDOWN_HCA_IN_PROFILE_GRACEFUL_CLOSE = 0x0,
MLX5_TEARDOWN_HCA_IN_PROFILE_FORCE_CLOSE = 0x1,
MLX5_TEARDOWN_HCA_IN_PROFILE_PREPARE_FAST_TEARDOWN = 0x2,
};
struct mlx5_ifc_teardown_hca_in_bits {