Commit bcda1aca authored Jan 02, 2017 by Artemy Kovalyov Committed by David S. Miller Jan 02, 2017

net/mlx5: Support new MR features



This patch adds the following items to IFC file.

1. MLX5_MKC_ACCESS_MODE_KSM enum value for creating KSM memory keys.
KSM access mode used when indirect MKey associated with fixed memory
size entries.

2. null_mkey field that is used to indicate non-present KLM/KSM
entries, where it causes the device to generate page fault event
when trying to access it.

3. struct mlx5_ifc_cmd_hca_cap_bits capability bits indicating
related value/field is supported:
* fixed_buffer_size - MLX5_MKC_ACCESS_MODE_KSM
* umr_extended_translation_offset - translation_offset_42_16
    in UMR ctrl segment
* null_mkey - null_mkey in QUERY_SPECIAL_CONTEXTS

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent d5ea2df9

include/linux/mlx5/mlx5_ifc.h

+8 −2

Original line number	Diff line number	Diff line
		@@ -782,11 +782,12 @@ struct mlx5_ifc_cmd_hca_cap_bits {
		u8 log_max_eq[0x4];

		u8 max_indirection[0x8];
		u8 reserved_at_108[0x1];
		u8 fixed_buffer_size[0x1];
		u8 log_max_mrw_sz[0x7];
		u8 reserved_at_110[0x2];
		u8 log_max_bsf_list_size[0x6];
		u8 reserved_at_118[0x2];
		u8 umr_extended_translation_offset[0x1];
		u8 null_mkey[0x1];
		u8 log_max_klm_list_size[0x6];

		u8 reserved_at_120[0xa];
		@@ -2569,6 +2570,7 @@ enum {
		MLX5_MKC_ACCESS_MODE_PA = 0x0,
		MLX5_MKC_ACCESS_MODE_MTT = 0x1,
		MLX5_MKC_ACCESS_MODE_KLMS = 0x2,
		MLX5_MKC_ACCESS_MODE_KSM = 0x3,
		};

		struct mlx5_ifc_mkc_bits {
		@@ -3677,6 +3679,10 @@ struct mlx5_ifc_query_special_contexts_out_bits {
		u8 dump_fill_mkey[0x20];

		u8 resd_lkey[0x20];

		u8 null_mkey[0x20];

		u8 reserved_at_a0[0x60];
		};

		struct mlx5_ifc_query_special_contexts_in_bits {

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