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/*
*------------------------------------------------------------------
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#ifndef _AF_XDP_H_
#define _AF_XDP_H_
#include <vlib/log.h>
#include <vnet/interface.h>
#include <bpf/xsk.h>
#define AF_XDP_NUM_RX_QUEUES_ALL ((u16)-1)
#define af_xdp_log(lvl, dev, f, ...) \
vlib_log(lvl, af_xdp_main.log_class, "%v: " f, (dev)->name, ##__VA_ARGS__)
#define foreach_af_xdp_device_flags \
_ (0, INITIALIZED, "initialized") \
_ (1, ERROR, "error") \
_ (2, ADMIN_UP, "admin-up") \
_ (3, LINK_UP, "link-up") \
_ (4, ZEROCOPY, "zero-copy") \
_ (5, SYSCALL_LOCK, "syscall-lock")
enum
{
#define _(a, b, c) AF_XDP_DEVICE_F_##b = (1 << a),
foreach_af_xdp_device_flags
#undef _
};
#define af_xdp_device_error(dev, fmt, ...) \
if (!(dev)->error) \
{ \
clib_error_t *err_ = clib_error_return_unix (0, fmt, ## __VA_ARGS__); \
if (!clib_atomic_bool_cmp_and_swap (&(dev)->error, 0, err_)) \
clib_error_free(err_); \
}
typedef enum
{
AF_XDP_RXQ_MODE_UNKNOWN,
AF_XDP_RXQ_MODE_POLLING,
AF_XDP_RXQ_MODE_INTERRUPT,
} __clib_packed af_xdp_rxq_mode_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
clib_spinlock_t syscall_lock;
struct xsk_ring_cons rx;
struct xsk_ring_prod fq;
int xsk_fd;
/* fields below are accessed in control-plane only (cold) */
uword file_index;
u32 queue_index;
af_xdp_rxq_mode_t mode;
} af_xdp_rxq_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
clib_spinlock_t lock;
clib_spinlock_t syscall_lock;
struct xsk_ring_prod tx;
struct xsk_ring_cons cq;
int xsk_fd;
} af_xdp_txq_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* fields below are accessed in data-plane (hot) */
af_xdp_rxq_t *rxqs;
af_xdp_txq_t *txqs;
vlib_buffer_t *buffer_template;
u32 per_interface_next_index;
u32 sw_if_index;
u32 hw_if_index;
u32 flags;
u8 pool; /* buffer pool index */
u8 txq_num;
/* fields below are accessed in control-plane only (cold) */
char *name;
char *linux_ifname;
u32 dev_instance;
u8 hwaddr[6];
u8 rxq_num;
struct xsk_umem **umem;
struct xsk_socket **xsk;
struct bpf_object *bpf_obj;
unsigned linux_ifindex;
/* error */
clib_error_t *error;
} af_xdp_device_t;
typedef struct
{
af_xdp_device_t *devices;
vlib_log_class_t log_class;
u16 msg_id_base;
} af_xdp_main_t;
extern af_xdp_main_t af_xdp_main;
typedef enum
{
AF_XDP_MODE_AUTO = 0,
AF_XDP_MODE_COPY = 1,
AF_XDP_MODE_ZERO_COPY = 2,
} af_xdp_mode_t;
typedef enum
{
AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK = 1,
} af_xdp_create_flag_t;
typedef struct
{
char *linux_ifname;
char *name;
char *prog;
af_xdp_mode_t mode;
af_xdp_create_flag_t flags;
u32 rxq_size;
u32 txq_size;
u32 rxq_num;
/* return */
int rv;
u32 sw_if_index;
clib_error_t *error;
} af_xdp_create_if_args_t;
void af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args);
void af_xdp_delete_if (vlib_main_t * vm, af_xdp_device_t * ad);
void af_xdp_device_input_refill (af_xdp_device_t *ad);
extern vlib_node_registration_t af_xdp_input_node;
extern vnet_device_class_t af_xdp_device_class;
/* format.c */
format_function_t format_af_xdp_device;
format_function_t format_af_xdp_device_name;
format_function_t format_af_xdp_input_trace;
/* unformat.c */
unformat_function_t unformat_af_xdp_create_if_args;
typedef struct
{
u32 next_index;
u32 hw_if_index;
} af_xdp_input_trace_t;
#define foreach_af_xdp_tx_func_error \
_ (NO_FREE_SLOTS, "no free tx slots") \
_ (SYSCALL_REQUIRED, "syscall required") \
_ (SYSCALL_FAILURES, "syscall failures")
typedef enum
{
#define _(f,s) AF_XDP_TX_ERROR_##f,
foreach_af_xdp_tx_func_error
#undef _
AF_XDP_TX_N_ERROR,
} af_xdp_tx_func_error_t;
#endif /* _AF_XDP_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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