mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
194 lines
4.7 KiB
194 lines
4.7 KiB
/* |
|
* 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 <linux/slab.h> |
|
#include "vnic_dev.h" |
|
#include "vnic_rq.h" |
|
|
|
static int vnic_rq_alloc_bufs(struct vnic_rq *rq) |
|
{ |
|
struct vnic_rq_buf *buf; |
|
unsigned int i, j, count = rq->ring.desc_count; |
|
unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count); |
|
|
|
for (i = 0; i < blks; i++) { |
|
rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC); |
|
if (!rq->bufs[i]) { |
|
printk(KERN_ERR "Failed to alloc rq_bufs\n"); |
|
return -ENOMEM; |
|
} |
|
} |
|
|
|
for (i = 0; i < blks; i++) { |
|
buf = rq->bufs[i]; |
|
for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) { |
|
buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j; |
|
buf->desc = (u8 *)rq->ring.descs + |
|
rq->ring.desc_size * buf->index; |
|
if (buf->index + 1 == count) { |
|
buf->next = rq->bufs[0]; |
|
break; |
|
} else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) { |
|
buf->next = rq->bufs[i + 1]; |
|
} else { |
|
buf->next = buf + 1; |
|
buf++; |
|
} |
|
} |
|
} |
|
|
|
rq->to_use = rq->to_clean = rq->bufs[0]; |
|
rq->buf_index = 0; |
|
|
|
return 0; |
|
} |
|
|
|
void vnic_rq_free(struct vnic_rq *rq) |
|
{ |
|
struct vnic_dev *vdev; |
|
unsigned int i; |
|
|
|
vdev = rq->vdev; |
|
|
|
vnic_dev_free_desc_ring(vdev, &rq->ring); |
|
|
|
for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) { |
|
kfree(rq->bufs[i]); |
|
rq->bufs[i] = NULL; |
|
} |
|
|
|
rq->ctrl = NULL; |
|
} |
|
|
|
int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index, |
|
unsigned int desc_count, unsigned int desc_size) |
|
{ |
|
int err; |
|
|
|
rq->index = index; |
|
rq->vdev = vdev; |
|
|
|
rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index); |
|
if (!rq->ctrl) { |
|
printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index); |
|
return -EINVAL; |
|
} |
|
|
|
vnic_rq_disable(rq); |
|
|
|
err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size); |
|
if (err) |
|
return err; |
|
|
|
err = vnic_rq_alloc_bufs(rq); |
|
if (err) { |
|
vnic_rq_free(rq); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, |
|
unsigned int error_interrupt_enable, |
|
unsigned int error_interrupt_offset) |
|
{ |
|
u64 paddr; |
|
u32 fetch_index; |
|
|
|
paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET; |
|
writeq(paddr, &rq->ctrl->ring_base); |
|
iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size); |
|
iowrite32(cq_index, &rq->ctrl->cq_index); |
|
iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable); |
|
iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset); |
|
iowrite32(0, &rq->ctrl->dropped_packet_count); |
|
iowrite32(0, &rq->ctrl->error_status); |
|
|
|
/* Use current fetch_index as the ring starting point */ |
|
fetch_index = ioread32(&rq->ctrl->fetch_index); |
|
rq->to_use = rq->to_clean = |
|
&rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES] |
|
[fetch_index % VNIC_RQ_BUF_BLK_ENTRIES]; |
|
iowrite32(fetch_index, &rq->ctrl->posted_index); |
|
|
|
rq->buf_index = 0; |
|
} |
|
|
|
unsigned int vnic_rq_error_status(struct vnic_rq *rq) |
|
{ |
|
return ioread32(&rq->ctrl->error_status); |
|
} |
|
|
|
void vnic_rq_enable(struct vnic_rq *rq) |
|
{ |
|
iowrite32(1, &rq->ctrl->enable); |
|
} |
|
|
|
int vnic_rq_disable(struct vnic_rq *rq) |
|
{ |
|
unsigned int wait; |
|
|
|
iowrite32(0, &rq->ctrl->enable); |
|
|
|
/* Wait for HW to ACK disable request */ |
|
for (wait = 0; wait < 100; wait++) { |
|
if (!(ioread32(&rq->ctrl->running))) |
|
return 0; |
|
udelay(1); |
|
} |
|
|
|
printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index); |
|
|
|
return -ETIMEDOUT; |
|
} |
|
|
|
void vnic_rq_clean(struct vnic_rq *rq, |
|
void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf)) |
|
{ |
|
struct vnic_rq_buf *buf; |
|
u32 fetch_index; |
|
|
|
WARN_ON(ioread32(&rq->ctrl->enable)); |
|
|
|
buf = rq->to_clean; |
|
|
|
while (vnic_rq_desc_used(rq) > 0) { |
|
|
|
(*buf_clean)(rq, buf); |
|
|
|
buf = rq->to_clean = buf->next; |
|
rq->ring.desc_avail++; |
|
} |
|
|
|
/* Use current fetch_index as the ring starting point */ |
|
fetch_index = ioread32(&rq->ctrl->fetch_index); |
|
rq->to_use = rq->to_clean = |
|
&rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES] |
|
[fetch_index % VNIC_RQ_BUF_BLK_ENTRIES]; |
|
iowrite32(fetch_index, &rq->ctrl->posted_index); |
|
|
|
rq->buf_index = 0; |
|
|
|
vnic_dev_clear_desc_ring(&rq->ring); |
|
} |
|
|
|
|