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 (3535B)

      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#ifndef _VNIC_INTR_H_
     19#define _VNIC_INTR_H_
     20
     21#include <linux/pci.h>
     22#include "vnic_dev.h"
     23
     24/*
     25 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
     26 * Driver) when both are built with CONFIG options =y
     27 */
     28#define vnic_intr_unmask fnic_intr_unmask
     29#define vnic_intr_mask fnic_intr_mask
     30#define vnic_intr_return_credits fnic_intr_return_credits
     31#define vnic_intr_credits fnic_intr_credits
     32#define vnic_intr_return_all_credits fnic_intr_return_all_credits
     33#define vnic_intr_legacy_pba fnic_intr_legacy_pba
     34#define vnic_intr_free fnic_intr_free
     35#define vnic_intr_alloc fnic_intr_alloc
     36#define vnic_intr_init fnic_intr_init
     37#define vnic_intr_clean fnic_intr_clean
     38
     39#define VNIC_INTR_TIMER_MAX		0xffff
     40
     41#define VNIC_INTR_TIMER_TYPE_ABS	0
     42#define VNIC_INTR_TIMER_TYPE_QUIET	1
     43
     44/* Interrupt control */
     45struct vnic_intr_ctrl {
     46	u32 coalescing_timer;		/* 0x00 */
     47	u32 pad0;
     48	u32 coalescing_value;		/* 0x08 */
     49	u32 pad1;
     50	u32 coalescing_type;		/* 0x10 */
     51	u32 pad2;
     52	u32 mask_on_assertion;		/* 0x18 */
     53	u32 pad3;
     54	u32 mask;			/* 0x20 */
     55	u32 pad4;
     56	u32 int_credits;		/* 0x28 */
     57	u32 pad5;
     58	u32 int_credit_return;		/* 0x30 */
     59	u32 pad6;
     60};
     61
     62struct vnic_intr {
     63	unsigned int index;
     64	struct vnic_dev *vdev;
     65	struct vnic_intr_ctrl __iomem *ctrl;	/* memory-mapped */
     66};
     67
     68static inline void vnic_intr_unmask(struct vnic_intr *intr)
     69{
     70	iowrite32(0, &intr->ctrl->mask);
     71}
     72
     73static inline void vnic_intr_mask(struct vnic_intr *intr)
     74{
     75	iowrite32(1, &intr->ctrl->mask);
     76}
     77
     78static inline void vnic_intr_return_credits(struct vnic_intr *intr,
     79	unsigned int credits, int unmask, int reset_timer)
     80{
     81#define VNIC_INTR_UNMASK_SHIFT		16
     82#define VNIC_INTR_RESET_TIMER_SHIFT	17
     83
     84	u32 int_credit_return = (credits & 0xffff) |
     85		(unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
     86		(reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
     87
     88	iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
     89}
     90
     91static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
     92{
     93	return ioread32(&intr->ctrl->int_credits);
     94}
     95
     96static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
     97{
     98	unsigned int credits = vnic_intr_credits(intr);
     99	int unmask = 1;
    100	int reset_timer = 1;
    101
    102	vnic_intr_return_credits(intr, credits, unmask, reset_timer);
    103}
    104
    105static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
    106{
    107	/* read PBA without clearing */
    108	return ioread32(legacy_pba);
    109}
    110
    111void vnic_intr_free(struct vnic_intr *intr);
    112int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
    113	unsigned int index);
    114void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
    115	unsigned int coalescing_type, unsigned int mask_on_assertion);
    116void vnic_intr_clean(struct vnic_intr *intr);
    117
    118#endif /* _VNIC_INTR_H_ */