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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6 7#ifndef _VNIC_INTR_H_8#define _VNIC_INTR_H_9 10#include <linux/pci.h>11 12#include "vnic_dev.h"13 14#define VNIC_INTR_TIMER_TYPE_ABS 015#define VNIC_INTR_TIMER_TYPE_QUIET 116 17/* Interrupt control */18struct vnic_intr_ctrl {19 u32 coalescing_timer; /* 0x00 */20 u32 pad0;21 u32 coalescing_value; /* 0x08 */22 u32 pad1;23 u32 coalescing_type; /* 0x10 */24 u32 pad2;25 u32 mask_on_assertion; /* 0x18 */26 u32 pad3;27 u32 mask; /* 0x20 */28 u32 pad4;29 u32 int_credits; /* 0x28 */30 u32 pad5;31 u32 int_credit_return; /* 0x30 */32 u32 pad6;33};34 35struct vnic_intr {36 unsigned int index;37 struct vnic_dev *vdev;38 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */39};40 41static inline void vnic_intr_unmask(struct vnic_intr *intr)42{43 iowrite32(0, &intr->ctrl->mask);44}45 46static inline void vnic_intr_mask(struct vnic_intr *intr)47{48 iowrite32(1, &intr->ctrl->mask);49}50 51static inline int vnic_intr_masked(struct vnic_intr *intr)52{53 return ioread32(&intr->ctrl->mask);54}55 56static inline void vnic_intr_return_credits(struct vnic_intr *intr,57 unsigned int credits, int unmask, int reset_timer)58{59#define VNIC_INTR_UNMASK_SHIFT 1660#define VNIC_INTR_RESET_TIMER_SHIFT 1761 62 u32 int_credit_return = (credits & 0xffff) |63 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |64 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);65 66 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);67}68 69static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)70{71 return ioread32(&intr->ctrl->int_credits);72}73 74static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)75{76 unsigned int credits = vnic_intr_credits(intr);77 int unmask = 1;78 int reset_timer = 1;79 80 vnic_intr_return_credits(intr, credits, unmask, reset_timer);81}82 83static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)84{85 /* read PBA without clearing */86 return ioread32(legacy_pba);87}88 89void vnic_intr_free(struct vnic_intr *intr);90int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,91 unsigned int index);92void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,93 unsigned int coalescing_type, unsigned int mask_on_assertion);94void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,95 u32 coalescing_timer);96void vnic_intr_clean(struct vnic_intr *intr);97 98#endif /* _VNIC_INTR_H_ */99