LXR dpdk/drivers/net/enic/base/vnic

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
   3 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4 */
   5
   6#ifndef _VNIC_RQ_H_
   7#define _VNIC_RQ_H_
   8
   9#include <stdbool.h>
  10
  11#include "vnic_dev.h"
  12#include "vnic_cq.h"
  13
  14/* Receive queue control */
  15struct vnic_rq_ctrl {
  16        uint64_t ring_base;                     /* 0x00 */
  17        uint32_t ring_size;                     /* 0x08 */
  18        uint32_t pad0;
  19        uint32_t posted_index;                  /* 0x10 */
  20        uint32_t pad1;
  21        uint32_t cq_index;                      /* 0x18 */
  22        uint32_t pad2;
  23        uint32_t enable;                        /* 0x20 */
  24        uint32_t pad3;
  25        uint32_t running;                       /* 0x28 */
  26        uint32_t pad4;
  27        uint32_t fetch_index;                   /* 0x30 */
  28        uint32_t pad5;
  29        uint32_t error_interrupt_enable;        /* 0x38 */
  30        uint32_t pad6;
  31        uint32_t error_interrupt_offset;        /* 0x40 */
  32        uint32_t pad7;
  33        uint32_t error_status;                  /* 0x48 */
  34        uint32_t pad8;
  35        uint32_t tcp_sn;                        /* 0x50 */
  36        uint32_t pad9;
  37        uint32_t unused;                        /* 0x58 */
  38        uint32_t pad10;
  39        uint32_t dca_select;                    /* 0x60 */
  40        uint32_t pad11;
  41        uint32_t dca_value;                     /* 0x68 */
  42        uint32_t pad12;
  43        uint32_t data_ring;                     /* 0x70 */
  44        uint32_t pad13;
  45        uint32_t header_split;                  /* 0x78 */
  46        uint32_t pad14;
  47};
  48
  49struct vnic_rq {
  50        unsigned int index;
  51        unsigned int posted_index;
  52        struct vnic_dev *vdev;
  53        struct vnic_rq_ctrl __iomem *ctrl;      /* memory-mapped */
  54        struct vnic_dev_ring ring;
  55        struct rte_mbuf **free_mbufs;           /* reserve of free mbufs */
  56        int num_free_mbufs;
  57        struct rte_mbuf **mbuf_ring;            /* array of allocated mbufs */
  58        unsigned int mbuf_next_idx;             /* next mb to consume */
  59        void *os_buf_head;
  60        unsigned int pkts_outstanding;
  61        uint16_t rx_nb_hold;
  62        uint16_t rx_free_thresh;
  63        unsigned int socket_id;
  64        struct rte_mempool *mp;
  65        uint16_t rxst_idx;
  66        uint32_t tot_pkts;
  67        uint16_t data_queue_idx;
  68        uint8_t data_queue_enable;
  69        uint8_t is_sop;
  70        uint8_t in_use;
  71        struct rte_mbuf *pkt_first_seg;
  72        struct rte_mbuf *pkt_last_seg;
  73        unsigned int max_mbufs_per_pkt;
  74        uint16_t tot_nb_desc;
  75        bool need_initial_post;
  76};
  77
  78static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
  79{
  80        /* how many does SW own? */
  81        return rq->ring.desc_avail;
  82}
  83
  84static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
  85{
  86        /* how many does HW own? */
  87        return rq->ring.desc_count - rq->ring.desc_avail - 1;
  88}
  89
  90
  91
  92enum desc_return_options {
  93        VNIC_RQ_RETURN_DESC,
  94        VNIC_RQ_DEFER_RETURN_DESC,
  95};
  96
  97static inline int vnic_rq_fill(struct vnic_rq *rq,
  98        int (*buf_fill)(struct vnic_rq *rq))
  99{
 100        int err;
 101
 102        while (vnic_rq_desc_avail(rq) > 0) {
 103
 104                err = (*buf_fill)(rq);
 105                if (err)
 106                        return err;
 107        }
 108
 109        return 0;
 110}
 111
 112static inline int vnic_rq_fill_count(struct vnic_rq *rq,
 113        int (*buf_fill)(struct vnic_rq *rq), unsigned int count)
 114{
 115        int err;
 116
 117        while ((vnic_rq_desc_avail(rq) > 0) && (count--)) {
 118
 119                err = (*buf_fill)(rq);
 120                if (err)
 121                        return err;
 122        }
 123
 124        return 0;
 125}
 126
 127void vnic_rq_free(struct vnic_rq *rq);
 128int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
 129        unsigned int desc_count, unsigned int desc_size);
 130void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
 131        unsigned int fetch_index, unsigned int posted_index,
 132        unsigned int error_interrupt_enable,
 133        unsigned int error_interrupt_offset);
 134void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
 135        unsigned int error_interrupt_enable,
 136        unsigned int error_interrupt_offset);
 137void vnic_rq_error_out(struct vnic_rq *rq, unsigned int error);
 138unsigned int vnic_rq_error_status(struct vnic_rq *rq);
 139void vnic_rq_enable(struct vnic_rq *rq);
 140int vnic_rq_disable(struct vnic_rq *rq);
 141void vnic_rq_clean(struct vnic_rq *rq,
 142        void (*buf_clean)(struct rte_mbuf **buf));
 143#endif /* _VNIC_RQ_H_ */
 144