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net/mlx5_core: Add setting ATOMIC endian mode

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HW is capable of 2 requestor endianness modes for standard 8 Bytes
atomic: BE (0x0) and host endianness (0x1). Read the supported modes
from hca atomic capabilities and configure HW to host endianness mode if
supported.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Eran Ben Elisha 2015-12-14 16:34:09 +02:00 committed by Doug Ledford
parent 67f1aee6f4
commit f91e6d8941
2 changed files with 70 additions and 9 deletions
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57
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@ -74,6 +74,11 @@ struct mlx5_device_context {
void *context;
};
enum {
MLX5_ATOMIC_REQ_MODE_BE = 0x0,
MLX5_ATOMIC_REQ_MODE_HOST_ENDIANNESS = 0x1,
};
static struct mlx5_profile profile[] = {
[0] = {
.mask = 0,
@ -383,7 +388,7 @@ query_ex:
return err;
}
static int set_caps(struct mlx5_core_dev *dev, void *in, int in_sz)
static int set_caps(struct mlx5_core_dev *dev, void *in, int in_sz, int opmod)
{
u32 out[MLX5_ST_SZ_DW(set_hca_cap_out)];
int err;
@ -391,6 +396,7 @@ static int set_caps(struct mlx5_core_dev *dev, void *in, int in_sz)
memset(out, 0, sizeof(out));
MLX5_SET(set_hca_cap_in, in, opcode, MLX5_CMD_OP_SET_HCA_CAP);
MLX5_SET(set_hca_cap_in, in, op_mod, opmod << 1);
err = mlx5_cmd_exec(dev, in, in_sz, out, sizeof(out));
if (err)
return err;
@ -400,6 +406,46 @@ static int set_caps(struct mlx5_core_dev *dev, void *in, int in_sz)
return err;
}
static int handle_hca_cap_atomic(struct mlx5_core_dev *dev)
{
void *set_ctx;
void *set_hca_cap;
int set_sz = MLX5_ST_SZ_BYTES(set_hca_cap_in);
int req_endianness;
int err;
if (MLX5_CAP_GEN(dev, atomic)) {
err = mlx5_core_get_caps(dev, MLX5_CAP_ATOMIC,
HCA_CAP_OPMOD_GET_CUR);
if (err)
return err;
} else {
return 0;
}
req_endianness =
MLX5_CAP_ATOMIC(dev,
supported_atomic_req_8B_endianess_mode_1);
if (req_endianness != MLX5_ATOMIC_REQ_MODE_HOST_ENDIANNESS)
return 0;
set_ctx = kzalloc(set_sz, GFP_KERNEL);
if (!set_ctx)
return -ENOMEM;
set_hca_cap = MLX5_ADDR_OF(set_hca_cap_in, set_ctx, capability);
/* Set requestor to host endianness */
MLX5_SET(atomic_caps, set_hca_cap, atomic_req_8B_endianess_mode,
MLX5_ATOMIC_REQ_MODE_HOST_ENDIANNESS);
err = set_caps(dev, set_ctx, set_sz, MLX5_SET_HCA_CAP_OP_MOD_ATOMIC);
kfree(set_ctx);
return err;
}
static int handle_hca_cap(struct mlx5_core_dev *dev)
{
void *set_ctx = NULL;
@ -441,7 +487,8 @@ static int handle_hca_cap(struct mlx5_core_dev *dev)
MLX5_SET(cmd_hca_cap, set_hca_cap, log_uar_page_sz, PAGE_SHIFT - 12);
err = set_caps(dev, set_ctx, set_sz);
err = set_caps(dev, set_ctx, set_sz,
MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE);
query_ex:
kfree(set_ctx);
@ -974,6 +1021,12 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
goto reclaim_boot_pages;
}
err = handle_hca_cap_atomic(dev);
if (err) {
dev_err(&pdev->dev, "handle_hca_cap_atomic failed\n");
goto reclaim_boot_pages;
}
err = mlx5_satisfy_startup_pages(dev, 0);
if (err) {
dev_err(&pdev->dev, "failed to allocate init pages\n");

22
include/linux/mlx5/mlx5_ifc.h
View File

@ -66,6 +66,11 @@ enum {
MLX5_MODIFY_TIR_BITMASK_TUNNELED_OFFLOAD_EN = 0x3
};
enum {
MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE = 0x0,
MLX5_SET_HCA_CAP_OP_MOD_ATOMIC = 0x3,
};
enum {
MLX5_CMD_OP_QUERY_HCA_CAP = 0x100,
MLX5_CMD_OP_QUERY_ADAPTER = 0x101,
@ -527,21 +532,24 @@ enum {
struct mlx5_ifc_atomic_caps_bits {
u8 reserved_0[0x40];
u8 atomic_req_endianness[0x1];
u8 reserved_1[0x1f];
u8 atomic_req_8B_endianess_mode[0x2];
u8 reserved_1[0x4];
u8 supported_atomic_req_8B_endianess_mode_1[0x1];
u8 reserved_2[0x20];
u8 reserved_2[0x19];
u8 reserved_3[0x10];
u8 atomic_operations[0x10];
u8 reserved_3[0x20];
u8 reserved_4[0x10];
u8 atomic_size_qp[0x10];
u8 atomic_operations[0x10];
u8 reserved_5[0x10];
u8 atomic_size_qp[0x10];
u8 reserved_6[0x10];
u8 atomic_size_dc[0x10];
u8 reserved_6[0x720];
u8 reserved_7[0x720];
};
struct mlx5_ifc_odp_cap_bits {