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1/* SPDX-License-Identifier: GPL-2.0-only */2/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */3 4#ifndef _VNIC_INTR_H_5#define _VNIC_INTR_H_6 7#include <linux/pci.h>8#include "vnic_dev.h"9 10#define VNIC_INTR_TIMER_MAX 0xffff11 12#define VNIC_INTR_TIMER_TYPE_ABS 013#define VNIC_INTR_TIMER_TYPE_QUIET 114 15/* Interrupt control */16struct vnic_intr_ctrl {17 u32 coalescing_timer; /* 0x00 */18 u32 pad0;19 u32 coalescing_value; /* 0x08 */20 u32 pad1;21 u32 coalescing_type; /* 0x10 */22 u32 pad2;23 u32 mask_on_assertion; /* 0x18 */24 u32 pad3;25 u32 mask; /* 0x20 */26 u32 pad4;27 u32 int_credits; /* 0x28 */28 u32 pad5;29 u32 int_credit_return; /* 0x30 */30 u32 pad6;31};32 33struct vnic_intr {34 unsigned int index;35 struct vnic_dev *vdev;36 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */37};38 39static inline void40svnic_intr_unmask(struct vnic_intr *intr)41{42 iowrite32(0, &intr->ctrl->mask);43}44 45static inline void46svnic_intr_mask(struct vnic_intr *intr)47{48 iowrite32(1, &intr->ctrl->mask);49}50 51static inline void52svnic_intr_return_credits(struct vnic_intr *intr,53 unsigned int credits,54 int unmask,55 int reset_timer)56{57#define VNIC_INTR_UNMASK_SHIFT 1658#define VNIC_INTR_RESET_TIMER_SHIFT 1759 60 u32 int_credit_return = (credits & 0xffff) |61 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |62 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);63 64 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);65}66 67static inline unsigned int68svnic_intr_credits(struct vnic_intr *intr)69{70 return ioread32(&intr->ctrl->int_credits);71}72 73static inline void74svnic_intr_return_all_credits(struct vnic_intr *intr)75{76 unsigned int credits = svnic_intr_credits(intr);77 int unmask = 1;78 int reset_timer = 1;79 80 svnic_intr_return_credits(intr, credits, unmask, reset_timer);81}82 83void svnic_intr_free(struct vnic_intr *);84int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int);85void svnic_intr_init(struct vnic_intr *intr,86 unsigned int coalescing_timer,87 unsigned int coalescing_type,88 unsigned int mask_on_assertion);89void svnic_intr_clean(struct vnic_intr *);90 91#endif /* _VNIC_INTR_H_ */92