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/*
* 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_wq.h"
static inline
int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
unsigned int index, enum vnic_res_type res_type)
{
wq->ctrl = vnic_dev_get_res(vdev, res_type, index);
if (!wq->ctrl)
return -EINVAL;
return 0;
}
static inline
int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
unsigned int desc_count, unsigned int desc_size)
{
char res_name[NAME_MAX];
static int instance;
snprintf(res_name, sizeof(res_name), "%d-wq-%d", instance++, wq->index);
return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size,
wq->socket_id, res_name);
}
static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
{
unsigned int count = wq->ring.desc_count;
/* Allocate the mbuf ring */
wq->bufs = (struct vnic_wq_buf *)rte_zmalloc_socket("wq->bufs",
sizeof(struct vnic_wq_buf) * count,
RTE_CACHE_LINE_SIZE, wq->socket_id);
wq->head_idx = 0;
wq->tail_idx = 0;
if (wq->bufs == NULL)
return -ENOMEM;
return 0;
}
void vnic_wq_free(struct vnic_wq *wq)
{
struct vnic_dev *vdev;
vdev = wq->vdev;
vnic_dev_free_desc_ring(vdev, &wq->ring);
rte_free(wq->bufs);
wq->ctrl = NULL;
}
int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
unsigned int desc_count, unsigned int desc_size)
{
int err;
wq->index = index;
wq->vdev = vdev;
err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ);
if (err) {
pr_err("Failed to hook WQ[%d] resource, err %d\n", index, err);
return err;
}
vnic_wq_disable(wq);
err = vnic_wq_alloc_ring(vdev, wq, desc_count, desc_size);
if (err)
return err;
err = vnic_wq_alloc_bufs(wq);
if (err) {
vnic_wq_free(wq);
return err;
}
return 0;
}
void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
unsigned int fetch_index, unsigned int posted_index,
unsigned int error_interrupt_enable,
unsigned int error_interrupt_offset)
{
u64 paddr;
unsigned int count = wq->ring.desc_count;
paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
writeq(paddr, &wq->ctrl->ring_base);
iowrite32(count, &wq->ctrl->ring_size);
iowrite32(fetch_index, &wq->ctrl->fetch_index);
iowrite32(posted_index, &wq->ctrl->posted_index);
iowrite32(cq_index, &wq->ctrl->cq_index);
iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
iowrite32(0, &wq->ctrl->error_status);
wq->head_idx = fetch_index;
wq->tail_idx = wq->head_idx;
}
void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
unsigned int error_interrupt_enable,
unsigned int error_interrupt_offset)
{
vnic_wq_init_start(wq, cq_index, 0, 0,
error_interrupt_enable,
error_interrupt_offset);
wq->last_completed_index = 0;
}
void vnic_wq_error_out(struct vnic_wq *wq, unsigned int error)
{
iowrite32(error, &wq->ctrl->error_status);
}
unsigned int vnic_wq_error_status(struct vnic_wq *wq)
{
return ioread32(&wq->ctrl->error_status);
}
void vnic_wq_enable(struct vnic_wq *wq)
{
iowrite32(1, &wq->ctrl->enable);
}
int vnic_wq_disable(struct vnic_wq *wq)
{
unsigned int wait;
iowrite32(0, &wq->ctrl->enable);
/* Wait for HW to ACK disable request */
for (wait = 0; wait < 1000; wait++) {
if (!(ioread32(&wq->ctrl->running)))
return 0;
udelay(10);
}
pr_err("Failed to disable WQ[%d]\n", wq->index);
return -ETIMEDOUT;
}
void vnic_wq_clean(struct vnic_wq *wq,
void (*buf_clean)(struct vnic_wq_buf *buf))
{
struct vnic_wq_buf *buf;
unsigned int to_clean = wq->tail_idx;
buf = &wq->bufs[to_clean];
while (vnic_wq_desc_used(wq) > 0) {
(*buf_clean)(buf);
to_clean = buf_idx_incr(wq->ring.desc_count, to_clean);
buf = &wq->bufs[to_clean];
wq->ring.desc_avail++;
}
wq->head_idx = 0;
wq->tail_idx = 0;
wq->last_completed_index = 0;
*((uint32_t *)wq->cqmsg_rz->addr) = 0;
iowrite32(0, &wq->ctrl->fetch_index);
iowrite32(0, &wq->ctrl->posted_index);
iowrite32(0, &wq->ctrl->error_status);
vnic_dev_clear_desc_ring(&wq->ring);
}
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