+++ /dev/null
-/*
- * 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.
- *
- */
-#ident "$Id: vnic_wq.c 183023 2014-07-22 23:47:25Z xuywang $"
-
-#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)
-{
- struct vnic_wq_buf *buf;
- unsigned int i, j, count = wq->ring.desc_count;
- unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
-
- for (i = 0; i < blks; i++) {
- wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC);
- if (!wq->bufs[i])
- 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_mem_size(struct vnic_wq *wq, unsigned int desc_count,
- unsigned int desc_size)
-{
- int mem_size = 0;
-
- mem_size += vnic_dev_desc_ring_size(&wq->ring, desc_count, desc_size);
-
- mem_size += VNIC_WQ_BUF_BLKS_NEEDED(wq->ring.desc_count) *
- VNIC_WQ_BUF_BLK_SZ(wq->ring.desc_count);
-
- return mem_size;
-}
-
-
-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->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);
-}
-
-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 *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);
-}
git.droids-corp.org / dpdk.git / blobdiff