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 (2058B)

      1/*
      2 * Copyright 2008-2010 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
     20#include <linux/kernel.h>
     21#include <linux/errno.h>
     22#include <linux/types.h>
     23#include <linux/pci.h>
     24#include <linux/delay.h>
     25
     26#include "vnic_dev.h"
     27#include "vnic_intr.h"
     28#include "enic.h"
     29
     30void vnic_intr_free(struct vnic_intr *intr)
     31{
     32	intr->ctrl = NULL;
     33}
     34
     35int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
     36	unsigned int index)
     37{
     38	intr->index = index;
     39	intr->vdev = vdev;
     40
     41	intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
     42	if (!intr->ctrl) {
     43		vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n",
     44			 index);
     45		return -EINVAL;
     46	}
     47
     48	return 0;
     49}
     50
     51void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
     52	unsigned int coalescing_type, unsigned int mask_on_assertion)
     53{
     54	vnic_intr_coalescing_timer_set(intr, coalescing_timer);
     55	iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
     56	iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
     57	iowrite32(0, &intr->ctrl->int_credits);
     58}
     59
     60void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
     61	u32 coalescing_timer)
     62{
     63	iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev,
     64		coalescing_timer), &intr->ctrl->coalescing_timer);
     65}
     66
     67void vnic_intr_clean(struct vnic_intr *intr)
     68{
     69	iowrite32(0, &intr->ctrl->int_credits);
     70}