1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */ |
3 | |
4 | #ifndef _VNIC_INTR_H_ |
5 | #define _VNIC_INTR_H_ |
6 | |
7 | #include <linux/pci.h> |
8 | #include "vnic_dev.h" |
9 | |
10 | #define VNIC_INTR_TIMER_MAX 0xffff |
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 | u32 pad0; |
19 | u32 coalescing_value; /* 0x08 */ |
20 | u32 pad1; |
21 | u32 coalescing_type; /* 0x10 */ |
22 | u32 pad2; |
23 | u32 mask_on_assertion; /* 0x18 */ |
24 | u32 pad3; |
25 | u32 mask; /* 0x20 */ |
26 | u32 pad4; |
27 | u32 int_credits; /* 0x28 */ |
28 | u32 pad5; |
29 | u32 int_credit_return; /* 0x30 */ |
30 | u32 pad6; |
31 | }; |
32 | |
33 | struct vnic_intr { |
34 | unsigned int index; |
35 | struct vnic_dev *vdev; |
36 | struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ |
37 | }; |
38 | |
39 | static inline void |
40 | svnic_intr_unmask(struct vnic_intr *intr) |
41 | { |
42 | iowrite32(0, &intr->ctrl->mask); |
43 | } |
44 | |
45 | static inline void |
46 | svnic_intr_mask(struct vnic_intr *intr) |
47 | { |
48 | iowrite32(1, &intr->ctrl->mask); |
49 | } |
50 | |
51 | static inline void |
52 | svnic_intr_return_credits(struct vnic_intr *intr, |
53 | unsigned int credits, |
54 | int unmask, |
55 | int reset_timer) |
56 | { |
57 | #define VNIC_INTR_UNMASK_SHIFT 16 |
58 | #define VNIC_INTR_RESET_TIMER_SHIFT 17 |
59 | |
60 | u32 int_credit_return = (credits & 0xffff) | |
61 | (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | |
62 | (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); |
63 | |
64 | iowrite32(int_credit_return, &intr->ctrl->int_credit_return); |
65 | } |
66 | |
67 | static inline unsigned int |
68 | svnic_intr_credits(struct vnic_intr *intr) |
69 | { |
70 | return ioread32(&intr->ctrl->int_credits); |
71 | } |
72 | |
73 | static inline void |
74 | svnic_intr_return_all_credits(struct vnic_intr *intr) |
75 | { |
76 | unsigned int credits = svnic_intr_credits(intr); |
77 | int unmask = 1; |
78 | int reset_timer = 1; |
79 | |
80 | svnic_intr_return_credits(intr, credits, unmask, reset_timer); |
81 | } |
82 | |
83 | void svnic_intr_free(struct vnic_intr *); |
84 | int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int); |
85 | void svnic_intr_init(struct vnic_intr *intr, |
86 | unsigned int coalescing_timer, |
87 | unsigned int coalescing_type, |
88 | unsigned int mask_on_assertion); |
89 | void svnic_intr_clean(struct vnic_intr *); |
90 | |
91 | #endif /* _VNIC_INTR_H_ */ |
92 | |