1*9c067b84SDoug Ambrisko /* SPDX-License-Identifier: BSD-3-Clause 2*9c067b84SDoug Ambrisko * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved. 3*9c067b84SDoug Ambrisko * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4*9c067b84SDoug Ambrisko */ 5*9c067b84SDoug Ambrisko 6*9c067b84SDoug Ambrisko #ifndef _VNIC_INTR_H_ 7*9c067b84SDoug Ambrisko #define _VNIC_INTR_H_ 8*9c067b84SDoug Ambrisko 9*9c067b84SDoug Ambrisko 10*9c067b84SDoug Ambrisko #include "vnic_dev.h" 11*9c067b84SDoug Ambrisko 12*9c067b84SDoug Ambrisko #define VNIC_INTR_TIMER_TYPE_ABS 0 13*9c067b84SDoug Ambrisko #define VNIC_INTR_TIMER_TYPE_QUIET 1 14*9c067b84SDoug Ambrisko 15*9c067b84SDoug Ambrisko /* Interrupt control */ 16*9c067b84SDoug Ambrisko struct vnic_intr_ctrl { 17*9c067b84SDoug Ambrisko u32 coalescing_timer; /* 0x00 */ 18*9c067b84SDoug Ambrisko #define INTR_COALESCING_TIMER 0x00 19*9c067b84SDoug Ambrisko u32 pad0; 20*9c067b84SDoug Ambrisko u32 coalescing_value; /* 0x08 */ 21*9c067b84SDoug Ambrisko #define INTR_COALESCING_VALUE 0x08 22*9c067b84SDoug Ambrisko u32 pad1; 23*9c067b84SDoug Ambrisko u32 coalescing_type; /* 0x10 */ 24*9c067b84SDoug Ambrisko #define INTR_COALESCING_TYPE 0x10 25*9c067b84SDoug Ambrisko u32 pad2; 26*9c067b84SDoug Ambrisko u32 mask_on_assertion; /* 0x18 */ 27*9c067b84SDoug Ambrisko #define INTR_MASK_ON_ASSERTION 0x18 28*9c067b84SDoug Ambrisko u32 pad3; 29*9c067b84SDoug Ambrisko u32 mask; /* 0x20 */ 30*9c067b84SDoug Ambrisko #define INTR_MASK 0x20 31*9c067b84SDoug Ambrisko u32 pad4; 32*9c067b84SDoug Ambrisko u32 int_credits; /* 0x28 */ 33*9c067b84SDoug Ambrisko #define INTR_CREDITS 0x28 34*9c067b84SDoug Ambrisko u32 pad5; 35*9c067b84SDoug Ambrisko u32 int_credit_return; /* 0x30 */ 36*9c067b84SDoug Ambrisko #define INTR_CREDIT_RETURN 0x30 37*9c067b84SDoug Ambrisko u32 pad6; 38*9c067b84SDoug Ambrisko }; 39*9c067b84SDoug Ambrisko 40*9c067b84SDoug Ambrisko struct vnic_intr { 41*9c067b84SDoug Ambrisko unsigned int index; 42*9c067b84SDoug Ambrisko struct vnic_dev *vdev; 43*9c067b84SDoug Ambrisko struct vnic_res *ctrl; 44*9c067b84SDoug Ambrisko }; 45*9c067b84SDoug Ambrisko 46*9c067b84SDoug Ambrisko static inline void vnic_intr_mask(struct vnic_intr *intr) 47*9c067b84SDoug Ambrisko { 48*9c067b84SDoug Ambrisko ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 1); 49*9c067b84SDoug Ambrisko } 50*9c067b84SDoug Ambrisko 51*9c067b84SDoug Ambrisko static inline int vnic_intr_masked(struct vnic_intr *intr) 52*9c067b84SDoug Ambrisko { 53*9c067b84SDoug Ambrisko int ret; 54*9c067b84SDoug Ambrisko 55*9c067b84SDoug Ambrisko ret = ENIC_BUS_READ_4(intr->ctrl, INTR_MASK); 56*9c067b84SDoug Ambrisko return ret; 57*9c067b84SDoug Ambrisko } 58*9c067b84SDoug Ambrisko 59*9c067b84SDoug Ambrisko static inline void vnic_intr_unmask(struct vnic_intr *intr) 60*9c067b84SDoug Ambrisko { 61*9c067b84SDoug Ambrisko ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 0); 62*9c067b84SDoug Ambrisko } 63*9c067b84SDoug Ambrisko 64*9c067b84SDoug Ambrisko static inline void vnic_intr_return_credits(struct vnic_intr *intr, 65*9c067b84SDoug Ambrisko unsigned int credits, int unmask, int reset_timer) 66*9c067b84SDoug Ambrisko { 67*9c067b84SDoug Ambrisko #define VNIC_INTR_UNMASK_SHIFT 16 68*9c067b84SDoug Ambrisko #define VNIC_INTR_RESET_TIMER_SHIFT 17 69*9c067b84SDoug Ambrisko 70*9c067b84SDoug Ambrisko u32 int_credit_return = (credits & 0xffff) | 71*9c067b84SDoug Ambrisko (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | 72*9c067b84SDoug Ambrisko (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); 73*9c067b84SDoug Ambrisko 74*9c067b84SDoug Ambrisko ENIC_BUS_WRITE_4(intr->ctrl, INTR_CREDIT_RETURN, int_credit_return); 75*9c067b84SDoug Ambrisko } 76*9c067b84SDoug Ambrisko 77*9c067b84SDoug Ambrisko static inline unsigned int vnic_intr_credits(struct vnic_intr *intr) 78*9c067b84SDoug Ambrisko { 79*9c067b84SDoug Ambrisko return ENIC_BUS_READ_4(intr->ctrl, INTR_CREDITS); 80*9c067b84SDoug Ambrisko } 81*9c067b84SDoug Ambrisko 82*9c067b84SDoug Ambrisko static inline void vnic_intr_return_all_credits(struct vnic_intr *intr) 83*9c067b84SDoug Ambrisko { 84*9c067b84SDoug Ambrisko unsigned int credits = vnic_intr_credits(intr); 85*9c067b84SDoug Ambrisko int unmask = 1; 86*9c067b84SDoug Ambrisko int reset_timer = 1; 87*9c067b84SDoug Ambrisko 88*9c067b84SDoug Ambrisko vnic_intr_return_credits(intr, credits, unmask, reset_timer); 89*9c067b84SDoug Ambrisko } 90*9c067b84SDoug Ambrisko 91*9c067b84SDoug Ambrisko void vnic_intr_free(struct vnic_intr *intr); 92*9c067b84SDoug Ambrisko int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 93*9c067b84SDoug Ambrisko unsigned int index); 94*9c067b84SDoug Ambrisko void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer, 95*9c067b84SDoug Ambrisko unsigned int coalescing_type, unsigned int mask_on_assertion); 96*9c067b84SDoug Ambrisko void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, 97*9c067b84SDoug Ambrisko u32 coalescing_timer); 98*9c067b84SDoug Ambrisko void vnic_intr_clean(struct vnic_intr *intr); 99*9c067b84SDoug Ambrisko 100*9c067b84SDoug Ambrisko #endif /* _VNIC_INTR_H_ */ 101