1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. |
4 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
5 | */ |
6 | |
7 | #ifndef _VNIC_INTR_H_ |
8 | #define _VNIC_INTR_H_ |
9 | |
10 | #include <linux/pci.h> |
11 | |
12 | #include "vnic_dev.h" |
13 | |
14 | #define VNIC_INTR_TIMER_TYPE_ABS 0 |
15 | #define VNIC_INTR_TIMER_TYPE_QUIET 1 |
16 | |
17 | /* Interrupt control */ |
18 | struct vnic_intr_ctrl { |
19 | u32 coalescing_timer; /* 0x00 */ |
20 | u32 pad0; |
21 | u32 coalescing_value; /* 0x08 */ |
22 | u32 pad1; |
23 | u32 coalescing_type; /* 0x10 */ |
24 | u32 pad2; |
25 | u32 mask_on_assertion; /* 0x18 */ |
26 | u32 pad3; |
27 | u32 mask; /* 0x20 */ |
28 | u32 pad4; |
29 | u32 int_credits; /* 0x28 */ |
30 | u32 pad5; |
31 | u32 int_credit_return; /* 0x30 */ |
32 | u32 pad6; |
33 | }; |
34 | |
35 | struct vnic_intr { |
36 | unsigned int index; |
37 | struct vnic_dev *vdev; |
38 | struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ |
39 | }; |
40 | |
41 | static inline void vnic_intr_unmask(struct vnic_intr *intr) |
42 | { |
43 | iowrite32(0, &intr->ctrl->mask); |
44 | } |
45 | |
46 | static inline void vnic_intr_mask(struct vnic_intr *intr) |
47 | { |
48 | iowrite32(1, &intr->ctrl->mask); |
49 | } |
50 | |
51 | static inline int vnic_intr_masked(struct vnic_intr *intr) |
52 | { |
53 | return ioread32(&intr->ctrl->mask); |
54 | } |
55 | |
56 | static inline void vnic_intr_return_credits(struct vnic_intr *intr, |
57 | unsigned int credits, int unmask, int reset_timer) |
58 | { |
59 | #define VNIC_INTR_UNMASK_SHIFT 16 |
60 | #define VNIC_INTR_RESET_TIMER_SHIFT 17 |
61 | |
62 | u32 int_credit_return = (credits & 0xffff) | |
63 | (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | |
64 | (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); |
65 | |
66 | iowrite32(int_credit_return, &intr->ctrl->int_credit_return); |
67 | } |
68 | |
69 | static inline unsigned int vnic_intr_credits(struct vnic_intr *intr) |
70 | { |
71 | return ioread32(&intr->ctrl->int_credits); |
72 | } |
73 | |
74 | static inline void vnic_intr_return_all_credits(struct vnic_intr *intr) |
75 | { |
76 | unsigned int credits = vnic_intr_credits(intr); |
77 | int unmask = 1; |
78 | int reset_timer = 1; |
79 | |
80 | vnic_intr_return_credits(intr, credits, unmask, reset_timer); |
81 | } |
82 | |
83 | static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba) |
84 | { |
85 | /* read PBA without clearing */ |
86 | return ioread32(legacy_pba); |
87 | } |
88 | |
89 | void vnic_intr_free(struct vnic_intr *intr); |
90 | int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, |
91 | unsigned int index); |
92 | void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer, |
93 | unsigned int coalescing_type, unsigned int mask_on_assertion); |
94 | void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, |
95 | u32 coalescing_timer); |
96 | void vnic_intr_clean(struct vnic_intr *intr); |
97 | |
98 | #endif /* _VNIC_INTR_H_ */ |
99 | |