diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec_offload.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec_offload.c | 385 |
1 files changed, 0 insertions, 385 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec_offload.c b/drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec_offload.c deleted file mode 100644 index d6667d38e1de..000000000000 --- a/drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec_offload.c +++ /dev/null @@ -1,385 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB -/* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. */ - -#include "mlx5_core.h" -#include "ipsec_offload.h" -#include "lib/mlx5.h" -#include "en_accel/ipsec_fs.h" - -#define MLX5_IPSEC_DEV_BASIC_CAPS (MLX5_ACCEL_IPSEC_CAP_DEVICE | MLX5_ACCEL_IPSEC_CAP_IPV6 | \ - MLX5_ACCEL_IPSEC_CAP_LSO) - -struct mlx5_ipsec_sa_ctx { - struct rhash_head hash; - u32 enc_key_id; - u32 ipsec_obj_id; - /* hw ctx */ - struct mlx5_core_dev *dev; - struct mlx5_ipsec_esp_xfrm *mxfrm; -}; - -struct mlx5_ipsec_esp_xfrm { - /* reference counter of SA ctx */ - struct mlx5_ipsec_sa_ctx *sa_ctx; - struct mutex lock; /* protects mlx5_ipsec_esp_xfrm */ - struct mlx5_accel_esp_xfrm accel_xfrm; -}; - -static u32 mlx5_ipsec_offload_device_caps(struct mlx5_core_dev *mdev) -{ - u32 caps = MLX5_IPSEC_DEV_BASIC_CAPS; - - if (!mlx5_is_ipsec_device(mdev)) - return 0; - - if (!MLX5_CAP_FLOWTABLE_NIC_TX(mdev, ipsec_encrypt) || - !MLX5_CAP_FLOWTABLE_NIC_RX(mdev, ipsec_decrypt)) - return 0; - - if (MLX5_CAP_IPSEC(mdev, ipsec_crypto_esp_aes_gcm_128_encrypt) && - MLX5_CAP_IPSEC(mdev, ipsec_crypto_esp_aes_gcm_128_decrypt)) - caps |= MLX5_ACCEL_IPSEC_CAP_ESP; - - if (MLX5_CAP_IPSEC(mdev, ipsec_esn)) { - caps |= MLX5_ACCEL_IPSEC_CAP_ESN; - caps |= MLX5_ACCEL_IPSEC_CAP_TX_IV_IS_ESN; - } - - /* We can accommodate up to 2^24 different IPsec objects - * because we use up to 24 bit in flow table metadata - * to hold the IPsec Object unique handle. - */ - WARN_ON_ONCE(MLX5_CAP_IPSEC(mdev, log_max_ipsec_offload) > 24); - return caps; -} - -static int -mlx5_ipsec_offload_esp_validate_xfrm_attrs(struct mlx5_core_dev *mdev, - const struct mlx5_accel_esp_xfrm_attrs *attrs) -{ - if (attrs->replay_type != MLX5_ACCEL_ESP_REPLAY_NONE) { - mlx5_core_err(mdev, "Cannot offload xfrm states with anti replay (replay_type = %d)\n", - attrs->replay_type); - return -EOPNOTSUPP; - } - - if (attrs->keymat_type != MLX5_ACCEL_ESP_KEYMAT_AES_GCM) { - mlx5_core_err(mdev, "Only aes gcm keymat is supported (keymat_type = %d)\n", - attrs->keymat_type); - return -EOPNOTSUPP; - } - - if (attrs->keymat.aes_gcm.iv_algo != - MLX5_ACCEL_ESP_AES_GCM_IV_ALGO_SEQ) { - mlx5_core_err(mdev, "Only iv sequence algo is supported (iv_algo = %d)\n", - attrs->keymat.aes_gcm.iv_algo); - return -EOPNOTSUPP; - } - - if (attrs->keymat.aes_gcm.key_len != 128 && - attrs->keymat.aes_gcm.key_len != 256) { - mlx5_core_err(mdev, "Cannot offload xfrm states with key length other than 128/256 bit (key length = %d)\n", - attrs->keymat.aes_gcm.key_len); - return -EOPNOTSUPP; - } - - if ((attrs->flags & MLX5_ACCEL_ESP_FLAGS_ESN_TRIGGERED) && - !MLX5_CAP_IPSEC(mdev, ipsec_esn)) { - mlx5_core_err(mdev, "Cannot offload xfrm states with ESN triggered\n"); - return -EOPNOTSUPP; - } - - return 0; -} - -static struct mlx5_accel_esp_xfrm * -mlx5_ipsec_offload_esp_create_xfrm(struct mlx5_core_dev *mdev, - const struct mlx5_accel_esp_xfrm_attrs *attrs, - u32 flags) -{ - struct mlx5_ipsec_esp_xfrm *mxfrm; - int err = 0; - - err = mlx5_ipsec_offload_esp_validate_xfrm_attrs(mdev, attrs); - if (err) - return ERR_PTR(err); - - mxfrm = kzalloc(sizeof(*mxfrm), GFP_KERNEL); - if (!mxfrm) - return ERR_PTR(-ENOMEM); - - mutex_init(&mxfrm->lock); - memcpy(&mxfrm->accel_xfrm.attrs, attrs, - sizeof(mxfrm->accel_xfrm.attrs)); - - return &mxfrm->accel_xfrm; -} - -static void mlx5_ipsec_offload_esp_destroy_xfrm(struct mlx5_accel_esp_xfrm *xfrm) -{ - struct mlx5_ipsec_esp_xfrm *mxfrm = container_of(xfrm, struct mlx5_ipsec_esp_xfrm, - accel_xfrm); - - /* assuming no sa_ctx are connected to this xfrm_ctx */ - WARN_ON(mxfrm->sa_ctx); - kfree(mxfrm); -} - -struct mlx5_ipsec_obj_attrs { - const struct aes_gcm_keymat *aes_gcm; - u32 accel_flags; - u32 esn_msb; - u32 enc_key_id; -}; - -static int mlx5_create_ipsec_obj(struct mlx5_core_dev *mdev, - struct mlx5_ipsec_obj_attrs *attrs, - u32 *ipsec_id) -{ - const struct aes_gcm_keymat *aes_gcm = attrs->aes_gcm; - u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; - u32 in[MLX5_ST_SZ_DW(create_ipsec_obj_in)] = {}; - void *obj, *salt_p, *salt_iv_p; - int err; - - obj = MLX5_ADDR_OF(create_ipsec_obj_in, in, ipsec_object); - - /* salt and seq_iv */ - salt_p = MLX5_ADDR_OF(ipsec_obj, obj, salt); - memcpy(salt_p, &aes_gcm->salt, sizeof(aes_gcm->salt)); - - switch (aes_gcm->icv_len) { - case 64: - MLX5_SET(ipsec_obj, obj, icv_length, - MLX5_IPSEC_OBJECT_ICV_LEN_8B); - break; - case 96: - MLX5_SET(ipsec_obj, obj, icv_length, - MLX5_IPSEC_OBJECT_ICV_LEN_12B); - break; - case 128: - MLX5_SET(ipsec_obj, obj, icv_length, - MLX5_IPSEC_OBJECT_ICV_LEN_16B); - break; - default: - return -EINVAL; - } - salt_iv_p = MLX5_ADDR_OF(ipsec_obj, obj, implicit_iv); - memcpy(salt_iv_p, &aes_gcm->seq_iv, sizeof(aes_gcm->seq_iv)); - /* esn */ - if (attrs->accel_flags & MLX5_ACCEL_ESP_FLAGS_ESN_TRIGGERED) { - MLX5_SET(ipsec_obj, obj, esn_en, 1); - MLX5_SET(ipsec_obj, obj, esn_msb, attrs->esn_msb); - if (attrs->accel_flags & MLX5_ACCEL_ESP_FLAGS_ESN_STATE_OVERLAP) - MLX5_SET(ipsec_obj, obj, esn_overlap, 1); - } - - MLX5_SET(ipsec_obj, obj, dekn, attrs->enc_key_id); - - /* general object fields set */ - MLX5_SET(general_obj_in_cmd_hdr, in, opcode, - MLX5_CMD_OP_CREATE_GENERAL_OBJECT); - MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, - MLX5_GENERAL_OBJECT_TYPES_IPSEC); - - err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); - if (!err) - *ipsec_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); - - return err; -} - -static void mlx5_destroy_ipsec_obj(struct mlx5_core_dev *mdev, u32 ipsec_id) -{ - u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {}; - u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; - - MLX5_SET(general_obj_in_cmd_hdr, in, opcode, - MLX5_CMD_OP_DESTROY_GENERAL_OBJECT); - MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, - MLX5_GENERAL_OBJECT_TYPES_IPSEC); - MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, ipsec_id); - - mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); -} - -static void *mlx5_ipsec_offload_create_sa_ctx(struct mlx5_core_dev *mdev, - struct mlx5_accel_esp_xfrm *accel_xfrm, - const __be32 saddr[4], const __be32 daddr[4], - const __be32 spi, bool is_ipv6, u32 *hw_handle) -{ - struct mlx5_accel_esp_xfrm_attrs *xfrm_attrs = &accel_xfrm->attrs; - struct aes_gcm_keymat *aes_gcm = &xfrm_attrs->keymat.aes_gcm; - struct mlx5_ipsec_obj_attrs ipsec_attrs = {}; - struct mlx5_ipsec_esp_xfrm *mxfrm; - struct mlx5_ipsec_sa_ctx *sa_ctx; - int err; - - /* alloc SA context */ - sa_ctx = kzalloc(sizeof(*sa_ctx), GFP_KERNEL); - if (!sa_ctx) - return ERR_PTR(-ENOMEM); - - sa_ctx->dev = mdev; - - mxfrm = container_of(accel_xfrm, struct mlx5_ipsec_esp_xfrm, accel_xfrm); - mutex_lock(&mxfrm->lock); - sa_ctx->mxfrm = mxfrm; - - /* key */ - err = mlx5_create_encryption_key(mdev, aes_gcm->aes_key, - aes_gcm->key_len / BITS_PER_BYTE, - MLX5_ACCEL_OBJ_IPSEC_KEY, - &sa_ctx->enc_key_id); - if (err) { - mlx5_core_dbg(mdev, "Failed to create encryption key (err = %d)\n", err); - goto err_sa_ctx; - } - - ipsec_attrs.aes_gcm = aes_gcm; - ipsec_attrs.accel_flags = accel_xfrm->attrs.flags; - ipsec_attrs.esn_msb = accel_xfrm->attrs.esn; - ipsec_attrs.enc_key_id = sa_ctx->enc_key_id; - err = mlx5_create_ipsec_obj(mdev, &ipsec_attrs, - &sa_ctx->ipsec_obj_id); - if (err) { - mlx5_core_dbg(mdev, "Failed to create IPsec object (err = %d)\n", err); - goto err_enc_key; - } - - *hw_handle = sa_ctx->ipsec_obj_id; - mxfrm->sa_ctx = sa_ctx; - mutex_unlock(&mxfrm->lock); - - return sa_ctx; - -err_enc_key: - mlx5_destroy_encryption_key(mdev, sa_ctx->enc_key_id); -err_sa_ctx: - mutex_unlock(&mxfrm->lock); - kfree(sa_ctx); - return ERR_PTR(err); -} - -static void mlx5_ipsec_offload_delete_sa_ctx(void *context) -{ - struct mlx5_ipsec_sa_ctx *sa_ctx = (struct mlx5_ipsec_sa_ctx *)context; - struct mlx5_ipsec_esp_xfrm *mxfrm = sa_ctx->mxfrm; - - mutex_lock(&mxfrm->lock); - mlx5_destroy_ipsec_obj(sa_ctx->dev, sa_ctx->ipsec_obj_id); - mlx5_destroy_encryption_key(sa_ctx->dev, sa_ctx->enc_key_id); - kfree(sa_ctx); - mxfrm->sa_ctx = NULL; - mutex_unlock(&mxfrm->lock); -} - -static int mlx5_ipsec_offload_init(struct mlx5_core_dev *mdev) -{ - return 0; -} - -static int mlx5_modify_ipsec_obj(struct mlx5_core_dev *mdev, - struct mlx5_ipsec_obj_attrs *attrs, - u32 ipsec_id) -{ - u32 in[MLX5_ST_SZ_DW(modify_ipsec_obj_in)] = {}; - u32 out[MLX5_ST_SZ_DW(query_ipsec_obj_out)]; - u64 modify_field_select = 0; - u64 general_obj_types; - void *obj; - int err; - - if (!(attrs->accel_flags & MLX5_ACCEL_ESP_FLAGS_ESN_TRIGGERED)) - return 0; - - general_obj_types = MLX5_CAP_GEN_64(mdev, general_obj_types); - if (!(general_obj_types & MLX5_HCA_CAP_GENERAL_OBJECT_TYPES_IPSEC)) - return -EINVAL; - - /* general object fields set */ - MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_QUERY_GENERAL_OBJECT); - MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_GENERAL_OBJECT_TYPES_IPSEC); - MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, ipsec_id); - err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); - if (err) { - mlx5_core_err(mdev, "Query IPsec object failed (Object id %d), err = %d\n", - ipsec_id, err); - return err; - } - - obj = MLX5_ADDR_OF(query_ipsec_obj_out, out, ipsec_object); - modify_field_select = MLX5_GET64(ipsec_obj, obj, modify_field_select); - - /* esn */ - if (!(modify_field_select & MLX5_MODIFY_IPSEC_BITMASK_ESN_OVERLAP) || - !(modify_field_select & MLX5_MODIFY_IPSEC_BITMASK_ESN_MSB)) - return -EOPNOTSUPP; - - obj = MLX5_ADDR_OF(modify_ipsec_obj_in, in, ipsec_object); - MLX5_SET(ipsec_obj, obj, esn_msb, attrs->esn_msb); - if (attrs->accel_flags & MLX5_ACCEL_ESP_FLAGS_ESN_STATE_OVERLAP) - MLX5_SET(ipsec_obj, obj, esn_overlap, 1); - - /* general object fields set */ - MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_MODIFY_GENERAL_OBJECT); - - return mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); -} - -static int mlx5_ipsec_offload_esp_modify_xfrm(struct mlx5_accel_esp_xfrm *xfrm, - const struct mlx5_accel_esp_xfrm_attrs *attrs) -{ - struct mlx5_ipsec_obj_attrs ipsec_attrs = {}; - struct mlx5_core_dev *mdev = xfrm->mdev; - struct mlx5_ipsec_esp_xfrm *mxfrm; - - int err = 0; - - if (!memcmp(&xfrm->attrs, attrs, sizeof(xfrm->attrs))) - return 0; - - if (mlx5_ipsec_offload_esp_validate_xfrm_attrs(mdev, attrs)) - return -EOPNOTSUPP; - - mxfrm = container_of(xfrm, struct mlx5_ipsec_esp_xfrm, accel_xfrm); - - mutex_lock(&mxfrm->lock); - - if (!mxfrm->sa_ctx) - /* Not bound xfrm, change only sw attrs */ - goto change_sw_xfrm_attrs; - - /* need to add find and replace in ipsec_rhash_sa the sa_ctx */ - /* modify device with new hw_sa */ - ipsec_attrs.accel_flags = attrs->flags; - ipsec_attrs.esn_msb = attrs->esn; - err = mlx5_modify_ipsec_obj(mdev, - &ipsec_attrs, - mxfrm->sa_ctx->ipsec_obj_id); - -change_sw_xfrm_attrs: - if (!err) - memcpy(&xfrm->attrs, attrs, sizeof(xfrm->attrs)); - - mutex_unlock(&mxfrm->lock); - return err; -} - -static const struct mlx5_accel_ipsec_ops ipsec_offload_ops = { - .device_caps = mlx5_ipsec_offload_device_caps, - .create_hw_context = mlx5_ipsec_offload_create_sa_ctx, - .free_hw_context = mlx5_ipsec_offload_delete_sa_ctx, - .init = mlx5_ipsec_offload_init, - .esp_create_xfrm = mlx5_ipsec_offload_esp_create_xfrm, - .esp_destroy_xfrm = mlx5_ipsec_offload_esp_destroy_xfrm, - .esp_modify_xfrm = mlx5_ipsec_offload_esp_modify_xfrm, -}; - -const struct mlx5_accel_ipsec_ops *mlx5_ipsec_offload_ops(struct mlx5_core_dev *mdev) -{ - if (!mlx5_ipsec_offload_device_caps(mdev)) - return NULL; - - return &ipsec_offload_ops; -} |