5df6d737dd
fnic is a driver for the Cisco PCI-Express FCoE HBA Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* Copyright 2008 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include "vnic_wq_copy.h"
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void vnic_wq_copy_enable(struct vnic_wq_copy *wq)
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{
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iowrite32(1, &wq->ctrl->enable);
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}
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int vnic_wq_copy_disable(struct vnic_wq_copy *wq)
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{
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unsigned int wait;
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iowrite32(0, &wq->ctrl->enable);
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/* Wait for HW to ACK disable request */
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for (wait = 0; wait < 100; wait++) {
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if (!(ioread32(&wq->ctrl->running)))
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return 0;
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udelay(1);
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}
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printk(KERN_ERR "Failed to disable Copy WQ[%d],"
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" fetch index=%d, posted_index=%d\n",
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wq->index, ioread32(&wq->ctrl->fetch_index),
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ioread32(&wq->ctrl->posted_index));
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return -ENODEV;
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}
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void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
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void (*q_clean)(struct vnic_wq_copy *wq,
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struct fcpio_host_req *wq_desc))
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{
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BUG_ON(ioread32(&wq->ctrl->enable));
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if (vnic_wq_copy_desc_in_use(wq))
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vnic_wq_copy_service(wq, -1, q_clean);
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wq->to_use_index = wq->to_clean_index = 0;
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iowrite32(0, &wq->ctrl->fetch_index);
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iowrite32(0, &wq->ctrl->posted_index);
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iowrite32(0, &wq->ctrl->error_status);
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vnic_dev_clear_desc_ring(&wq->ring);
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}
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void vnic_wq_copy_free(struct vnic_wq_copy *wq)
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{
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struct vnic_dev *vdev;
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vdev = wq->vdev;
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vnic_dev_free_desc_ring(vdev, &wq->ring);
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wq->ctrl = NULL;
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}
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int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
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unsigned int index, unsigned int desc_count,
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unsigned int desc_size)
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{
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int err;
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wq->index = index;
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wq->vdev = vdev;
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wq->to_use_index = wq->to_clean_index = 0;
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wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
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if (!wq->ctrl) {
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printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);
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return -EINVAL;
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}
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vnic_wq_copy_disable(wq);
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err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
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if (err)
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return err;
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return 0;
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}
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void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
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unsigned int error_interrupt_enable,
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unsigned int error_interrupt_offset)
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{
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u64 paddr;
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paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
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writeq(paddr, &wq->ctrl->ring_base);
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iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
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iowrite32(0, &wq->ctrl->fetch_index);
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iowrite32(0, &wq->ctrl->posted_index);
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iowrite32(cq_index, &wq->ctrl->cq_index);
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iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
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iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
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}
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