Release 4.7 drivers/scsi/snic/vnic_intr.c
/*
* Copyright 2014 Cisco 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 "vnic_dev.h"
#include "vnic_intr.h"
void svnic_intr_free(struct vnic_intr *intr)
{
intr->ctrl = NULL;
}
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int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
unsigned int index)
{
intr->index = index;
intr->vdev = vdev;
intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
if (!intr->ctrl) {
pr_err("Failed to hook INTR[%d].ctrl resource\n",
index);
return -EINVAL;
}
return 0;
}
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void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
unsigned int coalescing_type, unsigned int mask_on_assertion)
{
iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
iowrite32(0, &intr->ctrl->int_credits);
}
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void svnic_intr_clean(struct vnic_intr *intr)
{
iowrite32(0, &intr->ctrl->int_credits);
}
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