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#include <rte_memzone.h>
   7#include "vnic_dev.h"
   8#include "vnic_rq.h"
   9
  10void vnic_rq_free(struct vnic_rq *rq)
  11{
  12        struct vnic_dev *vdev;
  13
  14        vdev = rq->vdev;
  15
  16        vnic_dev_free_desc_ring(vdev, &rq->ring);
  17
  18        rq->ctrl = NULL;
  19}
  20
  21int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
  22        unsigned int desc_count, unsigned int desc_size)
  23{
  24        int rc;
  25        char res_name[RTE_MEMZONE_NAMESIZE];
  26        static int instance;
  27
  28        rq->index = index;
  29        rq->vdev = vdev;
  30
  31        rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
  32        if (!rq->ctrl) {
  33                pr_err("Failed to hook RQ[%u] resource\n", index);
  34                return -EINVAL;
  35        }
  36
  37        vnic_rq_disable(rq);
  38
  39        snprintf(res_name, sizeof(res_name), "%d-rq-%u", instance++, index);
  40        rc = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size,
  41                rq->socket_id, res_name);
  42        return rc;
  43}
  44
  45void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
  46        unsigned int fetch_index, unsigned int posted_index,
  47        unsigned int error_interrupt_enable,
  48        unsigned int error_interrupt_offset)
  49{
  50        uint64_t paddr;
  51        unsigned int count = rq->ring.desc_count;
  52
  53        paddr = (uint64_t)rq->ring.base_addr | VNIC_PADDR_TARGET;
  54        writeq(paddr, &rq->ctrl->ring_base);
  55        iowrite32(count, &rq->ctrl->ring_size);
  56        iowrite32(cq_index, &rq->ctrl->cq_index);
  57        iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
  58        iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
  59        iowrite32(0, &rq->ctrl->error_status);
  60        iowrite32(fetch_index, &rq->ctrl->fetch_index);
  61        iowrite32(posted_index, &rq->ctrl->posted_index);
  62        if (rq->data_queue_enable)
  63                iowrite32(((1 << 10) | rq->data_queue_idx),
  64                          &rq->ctrl->data_ring);
  65        else
  66                iowrite32(0, &rq->ctrl->data_ring);
  67}
  68
  69void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
  70        unsigned int error_interrupt_enable,
  71        unsigned int error_interrupt_offset)
  72{
  73        uint32_t fetch_index = 0;
  74
  75        /* Use current fetch_index as the ring starting point */
  76        fetch_index = ioread32(&rq->ctrl->fetch_index);
  77
  78        if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
  79                /* Hardware surprise removal: reset fetch_index */
  80                fetch_index = 0;
  81        }
  82
  83        vnic_rq_init_start(rq, cq_index,
  84                fetch_index, fetch_index,
  85                error_interrupt_enable,
  86                error_interrupt_offset);
  87        rq->rxst_idx = 0;
  88        rq->tot_pkts = 0;
  89        rq->pkt_first_seg = NULL;
  90        rq->pkt_last_seg = NULL;
  91}
  92
  93unsigned int vnic_rq_error_status(struct vnic_rq *rq)
  94{
  95        return ioread32(&rq->ctrl->error_status);
  96}
  97
  98void vnic_rq_enable(struct vnic_rq *rq)
  99{
 100        iowrite32(1, &rq->ctrl->enable);
 101}
 102
 103int vnic_rq_disable(struct vnic_rq *rq)
 104{
 105        unsigned int wait;
 106
 107        iowrite32(0, &rq->ctrl->enable);
 108
 109        /* Wait for HW to ACK disable request */
 110        for (wait = 0; wait < 1000; wait++) {
 111                if (!(ioread32(&rq->ctrl->running)))
 112                        return 0;
 113                usleep(10);
 114        }
 115
 116        pr_err("Failed to disable RQ[%d]\n", rq->index);
 117
 118        return -ETIMEDOUT;
 119}
 120
 121void vnic_rq_clean(struct vnic_rq *rq,
 122        void (*buf_clean)(struct rte_mbuf **buf))
 123{
 124        struct rte_mbuf **buf;
 125        uint32_t fetch_index, i;
 126        unsigned int count = rq->ring.desc_count;
 127
 128        buf = &rq->mbuf_ring[0];
 129
 130        for (i = 0; i < count; i++) {
 131                (*buf_clean)(buf);
 132                buf++;
 133        }
 134        rq->ring.desc_avail = count - 1;
 135        rq->rx_nb_hold = 0;
 136
 137        /* Use current fetch_index as the ring starting point */
 138        fetch_index = ioread32(&rq->ctrl->fetch_index);
 139
 140        if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */
 141                /* Hardware surprise removal: reset fetch_index */
 142                fetch_index = 0;
 143        }
 144
 145        iowrite32(fetch_index, &rq->ctrl->posted_index);
 146
 147        vnic_dev_clear_desc_ring(&rq->ring);
 148}
 149