118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
|
|
* Copyright 2008 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you may redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/delay.h>
|
|
#include "vnic_wq_copy.h"
|
|
|
|
void vnic_wq_copy_enable(struct vnic_wq_copy *wq)
|
|
{
|
|
iowrite32(1, &wq->ctrl->enable);
|
|
}
|
|
|
|
int vnic_wq_copy_disable(struct vnic_wq_copy *wq)
|
|
{
|
|
unsigned int wait;
|
|
|
|
iowrite32(0, &wq->ctrl->enable);
|
|
|
|
/* Wait for HW to ACK disable request */
|
|
for (wait = 0; wait < 100; wait++) {
|
|
if (!(ioread32(&wq->ctrl->running)))
|
|
return 0;
|
|
udelay(1);
|
|
}
|
|
|
|
printk(KERN_ERR "Failed to disable Copy WQ[%d],"
|
|
" fetch index=%d, posted_index=%d\n",
|
|
wq->index, ioread32(&wq->ctrl->fetch_index),
|
|
ioread32(&wq->ctrl->posted_index));
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
|
|
void (*q_clean)(struct vnic_wq_copy *wq,
|
|
struct fcpio_host_req *wq_desc))
|
|
{
|
|
BUG_ON(ioread32(&wq->ctrl->enable));
|
|
|
|
if (vnic_wq_copy_desc_in_use(wq))
|
|
vnic_wq_copy_service(wq, -1, q_clean);
|
|
|
|
wq->to_use_index = wq->to_clean_index = 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);
|
|
}
|
|
|
|
void vnic_wq_copy_free(struct vnic_wq_copy *wq)
|
|
{
|
|
struct vnic_dev *vdev;
|
|
|
|
vdev = wq->vdev;
|
|
vnic_dev_free_desc_ring(vdev, &wq->ring);
|
|
wq->ctrl = NULL;
|
|
}
|
|
|
|
int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
|
|
unsigned int index, unsigned int desc_count,
|
|
unsigned int desc_size)
|
|
{
|
|
int err;
|
|
|
|
wq->index = index;
|
|
wq->vdev = vdev;
|
|
wq->to_use_index = wq->to_clean_index = 0;
|
|
wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
|
|
if (!wq->ctrl) {
|
|
printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);
|
|
return -EINVAL;
|
|
}
|
|
|
|
vnic_wq_copy_disable(wq);
|
|
|
|
err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
|
|
if (err)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
|
|
unsigned int error_interrupt_enable,
|
|
unsigned int error_interrupt_offset)
|
|
{
|
|
u64 paddr;
|
|
|
|
paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
|
|
writeq(paddr, &wq->ctrl->ring_base);
|
|
iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
|
|
iowrite32(0, &wq->ctrl->fetch_index);
|
|
iowrite32(0, &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);
|
|
}
|
|
|