text: /*
   * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   *
   * Copyright (c) 2014, Cisco Systems, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in
   * the documentation and/or other materials provided with the
   * distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #include "vnic_dev.h"
  #include "vnic_cq.h"
  
  void vnic_cq_free(struct vnic_cq *cq)
  {
  	vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
  
  	cq->ctrl = NULL;
  }
  
  int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
  	unsigned int socket_id,
  	unsigned int desc_count, unsigned int desc_size)
  {
  	int err;
  	char res_name[NAME_MAX];
  	static int instance;
  
  	cq->index = index;
  	cq->vdev = vdev;
  
  	cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
  	if (!cq->ctrl) {
  		pr_err("Failed to hook CQ[%u] resource\n", index);
  		return -EINVAL;
  	}
  
  	snprintf(res_name, sizeof(res_name), "%d-cq-%u", instance++, index);
  	err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size,
  		socket_id, res_name);
  	if (err)
  		return err;
  
  	return 0;
  }
  
  void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
  	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
  	unsigned int cq_tail_color, unsigned int interrupt_enable,
  	unsigned int cq_entry_enable, unsigned int cq_message_enable,
  	unsigned int interrupt_offset, u64 cq_message_addr)
  {
  	u64 paddr;
  
  	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
  	writeq(paddr, &cq->ctrl->ring_base);
  	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
  	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
  	iowrite32(color_enable, &cq->ctrl->color_enable);
  	iowrite32(cq_head, &cq->ctrl->cq_head);
  	iowrite32(cq_tail, &cq->ctrl->cq_tail);
  	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
  	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
  	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
  	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
  	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
  	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
  
  	cq->interrupt_offset = interrupt_offset;
  }
  
  void vnic_cq_clean(struct vnic_cq *cq)
  {
  	cq->to_clean = 0;
  	cq->last_color = 0;
  
  	iowrite32(0, &cq->ctrl->cq_head);
  	iowrite32(0, &cq->ctrl->cq_tail);
  	iowrite32(1, &cq->ctrl->cq_tail_color);
  
  	vnic_dev_clear_desc_ring(&cq->ring);
  }
  