2014-11-25 17:26:42 +00:00
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/*
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* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* Copyright (c) 2014, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "vnic_dev.h"
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#include "vnic_wq.h"
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static inline
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int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
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unsigned int index, enum vnic_res_type res_type)
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{
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wq->ctrl = vnic_dev_get_res(vdev, res_type, index);
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if (!wq->ctrl)
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return -EINVAL;
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return 0;
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}
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static inline
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int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
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unsigned int desc_count, unsigned int desc_size)
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{
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char res_name[NAME_MAX];
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static int instance;
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snprintf(res_name, sizeof(res_name), "%d-wq-%d", instance++, wq->index);
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return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size,
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wq->socket_id, res_name);
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}
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static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
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{
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2016-06-03 00:22:50 +00:00
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unsigned int count = wq->ring.desc_count;
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/* Allocate the mbuf ring */
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wq->bufs = (struct vnic_wq_buf *)rte_zmalloc_socket("wq->bufs",
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sizeof(struct vnic_wq_buf) * count,
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RTE_CACHE_LINE_SIZE, wq->socket_id);
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wq->head_idx = 0;
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wq->tail_idx = 0;
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if (wq->bufs == NULL)
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return -ENOMEM;
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2014-11-25 17:26:42 +00:00
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return 0;
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}
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void vnic_wq_free(struct vnic_wq *wq)
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{
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struct vnic_dev *vdev;
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vdev = wq->vdev;
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vnic_dev_free_desc_ring(vdev, &wq->ring);
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2016-06-03 00:22:50 +00:00
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rte_free(wq->bufs);
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2014-11-25 17:26:42 +00:00
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wq->ctrl = NULL;
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}
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int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
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unsigned int desc_count, unsigned int desc_size)
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{
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int err;
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wq->index = index;
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wq->vdev = vdev;
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err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ);
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if (err) {
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pr_err("Failed to hook WQ[%d] resource, err %d\n", index, err);
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return err;
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}
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vnic_wq_disable(wq);
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err = vnic_wq_alloc_ring(vdev, wq, desc_count, desc_size);
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if (err)
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return err;
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err = vnic_wq_alloc_bufs(wq);
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if (err) {
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vnic_wq_free(wq);
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return err;
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}
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return 0;
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}
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void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
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unsigned int fetch_index, unsigned int posted_index,
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unsigned int error_interrupt_enable,
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unsigned int error_interrupt_offset)
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{
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u64 paddr;
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unsigned int count = wq->ring.desc_count;
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paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
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writeq(paddr, &wq->ctrl->ring_base);
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iowrite32(count, &wq->ctrl->ring_size);
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iowrite32(fetch_index, &wq->ctrl->fetch_index);
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iowrite32(posted_index, &wq->ctrl->posted_index);
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iowrite32(cq_index, &wq->ctrl->cq_index);
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iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
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iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
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iowrite32(0, &wq->ctrl->error_status);
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2016-06-03 00:22:50 +00:00
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wq->head_idx = fetch_index;
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wq->tail_idx = wq->head_idx;
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2014-11-25 17:26:42 +00:00
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}
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void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
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unsigned int error_interrupt_enable,
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unsigned int error_interrupt_offset)
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{
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vnic_wq_init_start(wq, cq_index, 0, 0,
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error_interrupt_enable,
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error_interrupt_offset);
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}
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void vnic_wq_error_out(struct vnic_wq *wq, unsigned int error)
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{
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iowrite32(error, &wq->ctrl->error_status);
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}
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unsigned int vnic_wq_error_status(struct vnic_wq *wq)
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{
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return ioread32(&wq->ctrl->error_status);
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}
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void vnic_wq_enable(struct vnic_wq *wq)
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{
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iowrite32(1, &wq->ctrl->enable);
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}
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int vnic_wq_disable(struct vnic_wq *wq)
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{
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unsigned int wait;
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iowrite32(0, &wq->ctrl->enable);
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/* Wait for HW to ACK disable request */
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for (wait = 0; wait < 1000; wait++) {
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if (!(ioread32(&wq->ctrl->running)))
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return 0;
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udelay(10);
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}
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pr_err("Failed to disable WQ[%d]\n", wq->index);
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return -ETIMEDOUT;
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}
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void vnic_wq_clean(struct vnic_wq *wq,
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void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
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{
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struct vnic_wq_buf *buf;
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2016-06-03 00:22:50 +00:00
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unsigned int to_clean = wq->tail_idx;
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2014-11-25 17:26:42 +00:00
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2016-06-03 00:22:50 +00:00
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buf = &wq->bufs[to_clean];
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2014-11-25 17:26:42 +00:00
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while (vnic_wq_desc_used(wq) > 0) {
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(*buf_clean)(wq, buf);
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2016-06-03 00:22:50 +00:00
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to_clean = buf_idx_incr(wq->ring.desc_count, to_clean);
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2014-11-25 17:26:42 +00:00
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2016-06-03 00:22:50 +00:00
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buf = &wq->bufs[to_clean];
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2014-11-25 17:26:42 +00:00
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wq->ring.desc_avail++;
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}
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2016-06-03 00:22:50 +00:00
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wq->head_idx = 0;
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wq->tail_idx = 0;
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2014-11-25 17:26:42 +00:00
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iowrite32(0, &wq->ctrl->fetch_index);
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iowrite32(0, &wq->ctrl->posted_index);
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iowrite32(0, &wq->ctrl->error_status);
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vnic_dev_clear_desc_ring(&wq->ring);
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}
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