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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6#ifndef _VNIC_INTR_H_7#define _VNIC_INTR_H_8 9#include <linux/pci.h>10#include "vnic_dev.h"11 12/*13 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth14 * Driver) when both are built with CONFIG options =y15 */16#define vnic_intr_unmask fnic_intr_unmask17#define vnic_intr_mask fnic_intr_mask18#define vnic_intr_return_credits fnic_intr_return_credits19#define vnic_intr_credits fnic_intr_credits20#define vnic_intr_return_all_credits fnic_intr_return_all_credits21#define vnic_intr_legacy_pba fnic_intr_legacy_pba22#define vnic_intr_free fnic_intr_free23#define vnic_intr_alloc fnic_intr_alloc24#define vnic_intr_init fnic_intr_init25#define vnic_intr_clean fnic_intr_clean26 27#define VNIC_INTR_TIMER_MAX 0xffff28 29#define VNIC_INTR_TIMER_TYPE_ABS 030#define VNIC_INTR_TIMER_TYPE_QUIET 131 32/* Interrupt control */33struct vnic_intr_ctrl {34 u32 coalescing_timer; /* 0x00 */35 u32 pad0;36 u32 coalescing_value; /* 0x08 */37 u32 pad1;38 u32 coalescing_type; /* 0x10 */39 u32 pad2;40 u32 mask_on_assertion; /* 0x18 */41 u32 pad3;42 u32 mask; /* 0x20 */43 u32 pad4;44 u32 int_credits; /* 0x28 */45 u32 pad5;46 u32 int_credit_return; /* 0x30 */47 u32 pad6;48};49 50struct vnic_intr {51 unsigned int index;52 struct vnic_dev *vdev;53 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */54};55 56static inline void vnic_intr_unmask(struct vnic_intr *intr)57{58 iowrite32(0, &intr->ctrl->mask);59}60 61static inline void vnic_intr_mask(struct vnic_intr *intr)62{63 iowrite32(1, &intr->ctrl->mask);64}65 66static inline void vnic_intr_return_credits(struct vnic_intr *intr,67 unsigned int credits, int unmask, int reset_timer)68{69#define VNIC_INTR_UNMASK_SHIFT 1670#define VNIC_INTR_RESET_TIMER_SHIFT 1771 72 u32 int_credit_return = (credits & 0xffff) |73 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |74 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);75 76 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);77}78 79static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)80{81 return ioread32(&intr->ctrl->int_credits);82}83 84static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)85{86 unsigned int credits = vnic_intr_credits(intr);87 int unmask = 1;88 int reset_timer = 1;89 90 vnic_intr_return_credits(intr, credits, unmask, reset_timer);91}92 93static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)94{95 /* read PBA without clearing */96 return ioread32(legacy_pba);97}98 99void vnic_intr_free(struct vnic_intr *intr);100int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,101 unsigned int index);102void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,103 unsigned int coalescing_type, unsigned int mask_on_assertion);104void vnic_intr_clean(struct vnic_intr *intr);105 106#endif /* _VNIC_INTR_H_ */107