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