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.h (2777B)

      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_INTR_H_
     19#define _VNIC_INTR_H_
     20
     21#include <linux/pci.h>
     22#include "vnic_dev.h"
     23
     24#define VNIC_INTR_TIMER_MAX		0xffff
     25
     26#define VNIC_INTR_TIMER_TYPE_ABS	0
     27#define VNIC_INTR_TIMER_TYPE_QUIET	1
     28
     29/* Interrupt control */
     30struct vnic_intr_ctrl {
     31	u32 coalescing_timer;		/* 0x00 */
     32	u32 pad0;
     33	u32 coalescing_value;		/* 0x08 */
     34	u32 pad1;
     35	u32 coalescing_type;		/* 0x10 */
     36	u32 pad2;
     37	u32 mask_on_assertion;		/* 0x18 */
     38	u32 pad3;
     39	u32 mask;			/* 0x20 */
     40	u32 pad4;
     41	u32 int_credits;		/* 0x28 */
     42	u32 pad5;
     43	u32 int_credit_return;		/* 0x30 */
     44	u32 pad6;
     45};
     46
     47struct vnic_intr {
     48	unsigned int index;
     49	struct vnic_dev *vdev;
     50	struct vnic_intr_ctrl __iomem *ctrl;	/* memory-mapped */
     51};
     52
     53static inline void
     54svnic_intr_unmask(struct vnic_intr *intr)
     55{
     56	iowrite32(0, &intr->ctrl->mask);
     57}
     58
     59static inline void
     60svnic_intr_mask(struct vnic_intr *intr)
     61{
     62	iowrite32(1, &intr->ctrl->mask);
     63}
     64
     65static inline void
     66svnic_intr_return_credits(struct vnic_intr *intr,
     67			  unsigned int credits,
     68			  int unmask,
     69			  int reset_timer)
     70{
     71#define VNIC_INTR_UNMASK_SHIFT		16
     72#define VNIC_INTR_RESET_TIMER_SHIFT	17
     73
     74	u32 int_credit_return = (credits & 0xffff) |
     75		(unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
     76		(reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
     77
     78	iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
     79}
     80
     81static inline unsigned int
     82svnic_intr_credits(struct vnic_intr *intr)
     83{
     84	return ioread32(&intr->ctrl->int_credits);
     85}
     86
     87static inline void
     88svnic_intr_return_all_credits(struct vnic_intr *intr)
     89{
     90	unsigned int credits = svnic_intr_credits(intr);
     91	int unmask = 1;
     92	int reset_timer = 1;
     93
     94	svnic_intr_return_credits(intr, credits, unmask, reset_timer);
     95}
     96
     97void svnic_intr_free(struct vnic_intr *);
     98int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int);
     99void svnic_intr_init(struct vnic_intr *intr,
    100		     unsigned int coalescing_timer,
    101		     unsigned int coalescing_type,
    102		     unsigned int mask_on_assertion);
    103void svnic_intr_clean(struct vnic_intr *);
    104
    105#endif /* _VNIC_INTR_H_ */