drivers/net/enic/base/vnic_cq.c

   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 "vnic_dev.h"
   7 #include "vnic_cq.h"
   8
   9 void vnic_cq_free(struct vnic_cq *cq)
  10 {
  11         vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
  12
  13         cq->ctrl = NULL;
  14 }
  15
  16 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
  17         unsigned int socket_id,
  18         unsigned int desc_count, unsigned int desc_size)
  19 {
  20         int err;
  21         char res_name[NAME_MAX];
  22         static int instance;
  23
  24         cq->index = index;
  25         cq->vdev = vdev;
  26
  27         cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
  28         if (!cq->ctrl) {
  29                 pr_err("Failed to hook CQ[%u] resource\n", index);
  30                 return -EINVAL;
  31         }
  32
  33         snprintf(res_name, sizeof(res_name), "%d-cq-%u", instance++, index);
  34         err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size,
  35                 socket_id, res_name);
  36         if (err)
  37                 return err;
  38
  39         return 0;
  40 }
  41
  42 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
  43         unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
  44         unsigned int cq_tail_color, unsigned int interrupt_enable,
  45         unsigned int cq_entry_enable, unsigned int cq_message_enable,
  46         unsigned int interrupt_offset, u64 cq_message_addr)
  47 {
  48         u64 paddr;
  49
  50         paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
  51         writeq(paddr, &cq->ctrl->ring_base);
  52         iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
  53         iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
  54         iowrite32(color_enable, &cq->ctrl->color_enable);
  55         iowrite32(cq_head, &cq->ctrl->cq_head);
  56         iowrite32(cq_tail, &cq->ctrl->cq_tail);
  57         iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
  58         iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
  59         iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
  60         iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
  61         iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
  62         writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
  63
  64         cq->interrupt_offset = interrupt_offset;
  65 }
  66
  67 void vnic_cq_clean(struct vnic_cq *cq)
  68 {
  69         cq->to_clean = 0;
  70         cq->last_color = 0;
  71
  72         iowrite32(0, &cq->ctrl->cq_head);
  73         iowrite32(0, &cq->ctrl->cq_tail);
  74         iowrite32(1, &cq->ctrl->cq_tail_color);
  75
  76         vnic_dev_clear_desc_ring(&cq->ring);
  77 }