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
vnic_intr_mask(struct vnic_intr * intr)46 static inline void vnic_intr_mask(struct vnic_intr *intr)
47 {
48 ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 1);
49 }
50
vnic_intr_masked(struct vnic_intr * intr)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
vnic_intr_unmask(struct vnic_intr * intr)59 static inline void vnic_intr_unmask(struct vnic_intr *intr)
60 {
61 ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 0);
62 }
63
vnic_intr_return_credits(struct vnic_intr * intr,unsigned int credits,int unmask,int reset_timer)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
vnic_intr_credits(struct vnic_intr * intr)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
vnic_intr_return_all_credits(struct vnic_intr * intr)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