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/* SPDX-License-Identifier: (BSD-3-Clause OR LGPL-2.1) */
/*
* Copyright(c) 2007-2014 Intel Corporation.
*/
#ifndef _RTE_KNI_COMMON_H_
#define _RTE_KNI_COMMON_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __KERNEL__
#include <linux/if.h>
#include <asm/barrier.h>
#define RTE_STD_C11
#else
#include <rte_common.h>
#include <rte_config.h>
#endif
/*
* KNI name is part of memzone name. Must not exceed IFNAMSIZ.
*/
#define RTE_KNI_NAMESIZE 16
#define RTE_CACHE_LINE_MIN_SIZE 64
/*
* Request id.
*/
enum rte_kni_req_id {
RTE_KNI_REQ_UNKNOWN = 0,
RTE_KNI_REQ_CHANGE_MTU,
RTE_KNI_REQ_CFG_NETWORK_IF,
RTE_KNI_REQ_CHANGE_MAC_ADDR,
RTE_KNI_REQ_CHANGE_PROMISC,
RTE_KNI_REQ_CHANGE_ALLMULTI,
RTE_KNI_REQ_MAX,
};
/*
* Structure for KNI request.
*/
struct rte_kni_request {
uint32_t req_id; /**< Request id */
RTE_STD_C11
union {
uint32_t new_mtu; /**< New MTU */
uint8_t if_up; /**< 1: interface up, 0: interface down */
uint8_t mac_addr[6]; /**< MAC address for interface */
uint8_t promiscusity;/**< 1: promisc mode enable, 0: disable */
uint8_t allmulti; /**< 1: all-multicast mode enable, 0: disable */
};
int32_t async : 1; /**< 1: request is asynchronous */
int32_t result; /**< Result for processing request */
} __attribute__((__packed__));
/*
* Fifo struct mapped in a shared memory. It describes a circular buffer FIFO
* Write and read should wrap around. Fifo is empty when write == read
* Writing should never overwrite the read position
*/
struct rte_kni_fifo {
#ifdef RTE_USE_C11_MEM_MODEL
unsigned write; /**< Next position to be written*/
unsigned read; /**< Next position to be read */
#else
volatile unsigned write; /**< Next position to be written*/
volatile unsigned read; /**< Next position to be read */
#endif
unsigned len; /**< Circular buffer length */
unsigned elem_size; /**< Pointer size - for 32/64 bit OS */
void *volatile buffer[]; /**< The buffer contains mbuf pointers */
};
/*
* The kernel image of the rte_mbuf struct, with only the relevant fields.
* Padding is necessary to assure the offsets of these fields
*/
struct rte_kni_mbuf {
void *buf_addr __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
uint64_t buf_iova;
uint16_t data_off; /**< Start address of data in segment buffer. */
char pad1[2];
uint16_t nb_segs; /**< Number of segments. */
char pad4[2];
uint64_t ol_flags; /**< Offload features. */
char pad2[4];
uint32_t pkt_len; /**< Total pkt len: sum of all segment data_len. */
uint16_t data_len; /**< Amount of data in segment buffer. */
char pad3[14];
void *pool;
/* fields on second cache line */
__attribute__((__aligned__(RTE_CACHE_LINE_MIN_SIZE)))
void *next; /**< Physical address of next mbuf in kernel. */
};
/*
* Struct used to create a KNI device. Passed to the kernel in IOCTL call
*/
struct rte_kni_device_info {
char name[RTE_KNI_NAMESIZE]; /**< Network device name for KNI */
phys_addr_t tx_phys;
phys_addr_t rx_phys;
phys_addr_t alloc_phys;
phys_addr_t free_phys;
/* Used by Ethtool */
phys_addr_t req_phys;
phys_addr_t resp_phys;
phys_addr_t sync_phys;
void * sync_va;
/* mbuf mempool */
void * mbuf_va;
phys_addr_t mbuf_phys;
uint16_t group_id; /**< Group ID */
uint32_t core_id; /**< core ID to bind for kernel thread */
__extension__
uint8_t force_bind : 1; /**< Flag for kernel thread binding */
/* mbuf size */
unsigned mbuf_size;
unsigned int mtu;
unsigned int min_mtu;
unsigned int max_mtu;
uint8_t mac_addr[6];
uint8_t iova_mode;
};
#define KNI_DEVICE "kni"
#define RTE_KNI_IOCTL_TEST _IOWR(0, 1, int)
#define RTE_KNI_IOCTL_CREATE _IOWR(0, 2, struct rte_kni_device_info)
#define RTE_KNI_IOCTL_RELEASE _IOWR(0, 3, struct rte_kni_device_info)
#ifdef __cplusplus
}
#endif
#endif /* _RTE_KNI_COMMON_H_ */
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