cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

vnic_cq_fw.h (1697B)

      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#ifndef _VNIC_CQ_FW_H_
     19#define _VNIC_CQ_FW_H_
     20
     21#include "snic_fwint.h"
     22
     23static inline unsigned int
     24vnic_cq_fw_service(struct vnic_cq *cq,
     25		   int (*q_service)(struct vnic_dev *vdev,
     26				    unsigned int index,
     27				    struct snic_fw_req *desc),
     28		   unsigned int work_to_do)
     29
     30{
     31	struct snic_fw_req *desc;
     32	unsigned int work_done = 0;
     33	u8 color;
     34
     35	desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
     36		cq->ring.desc_size * cq->to_clean);
     37	snic_color_dec(desc, &color);
     38
     39	while (color != cq->last_color) {
     40
     41		if ((*q_service)(cq->vdev, cq->index, desc))
     42			break;
     43
     44		cq->to_clean++;
     45		if (cq->to_clean == cq->ring.desc_count) {
     46			cq->to_clean = 0;
     47			cq->last_color = cq->last_color ? 0 : 1;
     48		}
     49
     50		desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
     51			cq->ring.desc_size * cq->to_clean);
     52		snic_color_dec(desc, &color);
     53
     54		work_done++;
     55		if (work_done >= work_to_do)
     56			break;
     57	}
     58
     59	return work_done;
     60}
     61
     62#endif /* _VNIC_CQ_FW_H_ */