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 (1844B)

      1/*
      2 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
      3 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
      4 *
      5 * This program is free software; you may redistribute it and/or modify
      6 * it under the terms of the GNU General Public License as published by
      7 * the Free Software Foundation; version 2 of the License.
      8 *
      9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     16 * SOFTWARE.
     17 */
     18
     19#include <linux/kernel.h>
     20#include <linux/errno.h>
     21#include <linux/types.h>
     22#include <linux/pci.h>
     23#include <linux/delay.h>
     24#include "vnic_dev.h"
     25#include "vnic_intr.h"
     26
     27void vnic_intr_free(struct vnic_intr *intr)
     28{
     29	intr->ctrl = NULL;
     30}
     31
     32int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
     33	unsigned int index)
     34{
     35	intr->index = index;
     36	intr->vdev = vdev;
     37
     38	intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
     39	if (!intr->ctrl) {
     40		printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
     41			index);
     42		return -EINVAL;
     43	}
     44
     45	return 0;
     46}
     47
     48void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
     49	unsigned int coalescing_type, unsigned int mask_on_assertion)
     50{
     51	iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
     52	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
     53	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
     54	iowrite32(0, &intr->ctrl->int_credits);
     55}
     56
     57void vnic_intr_clean(struct vnic_intr *intr)
     58{
     59	iowrite32(0, &intr->ctrl->int_credits);
     60}