cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vnic_intr.c (1780B)

      1/*
      2 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
      3 *
      4 * This program is free software; you may redistribute it and/or modify
      5 * it under the terms of the GNU General Public License as published by
      6 * the Free Software Foundation; version 2 of the License.
      7 *
      8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     15 * SOFTWARE.
     16 */
     17
     18#include <linux/kernel.h>
     19#include <linux/errno.h>
     20#include <linux/types.h>
     21#include <linux/pci.h>
     22#include <linux/delay.h>
     23#include "vnic_dev.h"
     24#include "vnic_intr.h"
     25
     26void svnic_intr_free(struct vnic_intr *intr)
     27{
     28	intr->ctrl = NULL;
     29}
     30
     31int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
     32	unsigned int index)
     33{
     34	intr->index = index;
     35	intr->vdev = vdev;
     36
     37	intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
     38	if (!intr->ctrl) {
     39		pr_err("Failed to hook INTR[%d].ctrl resource\n",
     40			index);
     41		return -EINVAL;
     42	}
     43
     44	return 0;
     45}
     46
     47void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
     48	unsigned int coalescing_type, unsigned int mask_on_assertion)
     49{
     50	iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
     51	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
     52	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
     53	iowrite32(0, &intr->ctrl->int_credits);
     54}
     55
     56void svnic_intr_clean(struct vnic_intr *intr)
     57{
     58	iowrite32(0, &intr->ctrl->int_credits);
     59}