diff options
Diffstat (limited to 'drivers/net/enic/vnic_wq.c')
| -rw-r--r-- | drivers/net/enic/vnic_wq.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/drivers/net/enic/vnic_wq.c b/drivers/net/enic/vnic_wq.c deleted file mode 100644 index df61bd932ea6..000000000000 --- a/drivers/net/enic/vnic_wq.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * Copyright 2008-2010 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/kernel.h> -#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_wq.h" - -static int vnic_wq_alloc_bufs(struct vnic_wq *wq) -{ - struct vnic_wq_buf *buf; - struct vnic_dev *vdev; - unsigned int i, j, count = wq->ring.desc_count; - unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count); - - vdev = wq->vdev; - - for (i = 0; i < blks; i++) { - wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC); - if (!wq->bufs[i]) { - pr_err("Failed to alloc wq_bufs\n"); - return -ENOMEM; - } - } - - for (i = 0; i < blks; i++) { - buf = wq->bufs[i]; - for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) { - buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j; - buf->desc = (u8 *)wq->ring.descs + - wq->ring.desc_size * buf->index; - if (buf->index + 1 == count) { - buf->next = wq->bufs[0]; - break; - } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) { - buf->next = wq->bufs[i + 1]; - } else { - buf->next = buf + 1; - buf++; - } - } - } - - wq->to_use = wq->to_clean = wq->bufs[0]; - - return 0; -} - -void vnic_wq_free(struct vnic_wq *wq) -{ - struct vnic_dev *vdev; - unsigned int i; - - vdev = wq->vdev; - - vnic_dev_free_desc_ring(vdev, &wq->ring); - - for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) { - if (wq->bufs[i]) { - kfree(wq->bufs[i]); - wq->bufs[i] = NULL; - } - } - - 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; - - wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index); - if (!wq->ctrl) { - pr_err("Failed to hook WQ[%d] resource\n", index); - return -EINVAL; - } - - vnic_wq_disable(wq); - - err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size); - if (err) - return err; - - err = vnic_wq_alloc_bufs(wq); - if (err) { - vnic_wq_free(wq); - return err; - } - - return 0; -} - -static 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->to_use = wq->to_clean = - &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)] - [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)]; -} - -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); -} - -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 *wq, struct vnic_wq_buf *buf)) -{ - struct vnic_wq_buf *buf; - - buf = wq->to_clean; - - while (vnic_wq_desc_used(wq) > 0) { - - (*buf_clean)(wq, buf); - - buf = wq->to_clean = buf->next; - wq->ring.desc_avail++; - } - - wq->to_use = wq->to_clean = wq->bufs[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); -} |