ceph/src/spdk/dpdk/lib/librte_eal/linux/eal/include/rte_kni_common.h

   1 /* SPDX-License-Identifier: (BSD-3-Clause OR LGPL-2.1) */
   2 /*
   3  * Copyright(c) 2007-2014 Intel Corporation.
   4  */
   5
   6 #ifndef _RTE_KNI_COMMON_H_
   7 #define _RTE_KNI_COMMON_H_
   8
   9 #ifdef __KERNEL__
  10 #include <linux/if.h>
  11 #include <asm/barrier.h>
  12 #define RTE_STD_C11
  13 #else
  14 #include <rte_common.h>
  15 #include <rte_config.h>
  16 #endif
  17
  18 /**
  19  * KNI name is part of memzone name.
  20  */
  21 #define RTE_KNI_NAMESIZE 32
  22
  23 #define RTE_CACHE_LINE_MIN_SIZE 64
  24
  25 /*
  26  * Request id.
  27  */
  28 enum rte_kni_req_id {
  29         RTE_KNI_REQ_UNKNOWN = 0,
  30         RTE_KNI_REQ_CHANGE_MTU,
  31         RTE_KNI_REQ_CFG_NETWORK_IF,
  32         RTE_KNI_REQ_CHANGE_MAC_ADDR,
  33         RTE_KNI_REQ_CHANGE_PROMISC,
  34         RTE_KNI_REQ_MAX,
  35 };
  36
  37 /*
  38  * Structure for KNI request.
  39  */
  40 struct rte_kni_request {
  41         uint32_t req_id;             /**< Request id */
  42         RTE_STD_C11
  43         union {
  44                 uint32_t new_mtu;    /**< New MTU */
  45                 uint8_t if_up;       /**< 1: interface up, 0: interface down */
  46                 uint8_t mac_addr[6]; /**< MAC address for interface */
  47                 uint8_t promiscusity;/**< 1: promisc mode enable, 0: disable */
  48         };
  49         int32_t result;               /**< Result for processing request */
  50 } __attribute__((__packed__));
  51
  52 /*
  53  * Fifo struct mapped in a shared memory. It describes a circular buffer FIFO
  54  * Write and read should wrap around. Fifo is empty when write == read
  55  * Writing should never overwrite the read position
  56  */
  57 struct rte_kni_fifo {
  58 #ifdef RTE_USE_C11_MEM_MODEL
  59         unsigned write;              /**< Next position to be written*/
  60         unsigned read;               /**< Next position to be read */
  61 #else
  62         volatile unsigned write;     /**< Next position to be written*/
  63         volatile unsigned read;      /**< Next position to be read */
  64 #endif
  65         unsigned len;                /**< Circular buffer length */
  66         unsigned elem_size;          /**< Pointer size - for 32/64 bit OS */
  67         void *volatile buffer[];     /**< The buffer contains mbuf pointers */
  68 };
  69
  70 /*
  71  * The kernel image of the rte_mbuf struct, with only the relevant fields.
  72  * Padding is necessary to assure the offsets of these fields
  73  */
  74 struct rte_kni_mbuf {
  75         void *buf_addr __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
  76         uint64_t buf_physaddr;
  77         uint16_t data_off;      /**< Start address of data in segment buffer. */
  78         char pad1[2];
  79         uint16_t nb_segs;       /**< Number of segments. */
  80         char pad4[2];
  81         uint64_t ol_flags;      /**< Offload features. */
  82         char pad2[4];
  83         uint32_t pkt_len;       /**< Total pkt len: sum of all segment data_len. */
  84         uint16_t data_len;      /**< Amount of data in segment buffer. */
  85
  86         /* fields on second cache line */
  87         char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_MIN_SIZE)));
  88         void *pool;
  89         void *next;
  90 };
  91
  92 /*
  93  * Struct used to create a KNI device. Passed to the kernel in IOCTL call
  94  */
  95
  96 struct rte_kni_device_info {
  97         char name[RTE_KNI_NAMESIZE];  /**< Network device name for KNI */
  98
  99         phys_addr_t tx_phys;
 100         phys_addr_t rx_phys;
 101         phys_addr_t alloc_phys;
 102         phys_addr_t free_phys;
 103
 104         /* Used by Ethtool */
 105         phys_addr_t req_phys;
 106         phys_addr_t resp_phys;
 107         phys_addr_t sync_phys;
 108         void * sync_va;
 109
 110         /* mbuf mempool */
 111         void * mbuf_va;
 112         phys_addr_t mbuf_phys;
 113
 114         /* PCI info */
 115         uint16_t vendor_id;           /**< Vendor ID or PCI_ANY_ID. */
 116         uint16_t device_id;           /**< Device ID or PCI_ANY_ID. */
 117         uint8_t bus;                  /**< Device bus */
 118         uint8_t devid;                /**< Device ID */
 119         uint8_t function;             /**< Device function. */
 120
 121         uint16_t group_id;            /**< Group ID */
 122         uint32_t core_id;             /**< core ID to bind for kernel thread */
 123
 124         __extension__
 125         uint8_t force_bind : 1;       /**< Flag for kernel thread binding */
 126
 127         /* mbuf size */
 128         unsigned mbuf_size;
 129         unsigned int mtu;
 130         uint8_t mac_addr[6];
 131 };
 132
 133 #define KNI_DEVICE "kni"
 134
 135 #define RTE_KNI_IOCTL_TEST    _IOWR(0, 1, int)
 136 #define RTE_KNI_IOCTL_CREATE  _IOWR(0, 2, struct rte_kni_device_info)
 137 #define RTE_KNI_IOCTL_RELEASE _IOWR(0, 3, struct rte_kni_device_info)
 138
 139 #endif /* _RTE_KNI_COMMON_H_ */