e6550b3ee1
Based on the normalized pattern:
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
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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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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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return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
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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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