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