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1 | /* |
2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. | |
3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. | |
4 | * | |
5 | * This program is free software; you may redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
16 | * SOFTWARE. | |
17 | */ | |
18 | #ifndef _VNIC_INTR_H_ | |
19 | #define _VNIC_INTR_H_ | |
20 | ||
21 | #include <linux/pci.h> | |
22 | #include "vnic_dev.h" | |
23 | ||
24 | /* | |
25 | * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth | |
26 | * Driver) when both are built with CONFIG options =y | |
27 | */ | |
28 | #define vnic_intr_unmask fnic_intr_unmask | |
29 | #define vnic_intr_mask fnic_intr_mask | |
30 | #define vnic_intr_return_credits fnic_intr_return_credits | |
31 | #define vnic_intr_credits fnic_intr_credits | |
32 | #define vnic_intr_return_all_credits fnic_intr_return_all_credits | |
33 | #define vnic_intr_legacy_pba fnic_intr_legacy_pba | |
34 | #define vnic_intr_free fnic_intr_free | |
35 | #define vnic_intr_alloc fnic_intr_alloc | |
36 | #define vnic_intr_init fnic_intr_init | |
37 | #define vnic_intr_clean fnic_intr_clean | |
38 | ||
39 | #define VNIC_INTR_TIMER_MAX 0xffff | |
40 | ||
41 | #define VNIC_INTR_TIMER_TYPE_ABS 0 | |
42 | #define VNIC_INTR_TIMER_TYPE_QUIET 1 | |
43 | ||
44 | /* Interrupt control */ | |
45 | struct vnic_intr_ctrl { | |
46 | u32 coalescing_timer; /* 0x00 */ | |
47 | u32 pad0; | |
48 | u32 coalescing_value; /* 0x08 */ | |
49 | u32 pad1; | |
50 | u32 coalescing_type; /* 0x10 */ | |
51 | u32 pad2; | |
52 | u32 mask_on_assertion; /* 0x18 */ | |
53 | u32 pad3; | |
54 | u32 mask; /* 0x20 */ | |
55 | u32 pad4; | |
56 | u32 int_credits; /* 0x28 */ | |
57 | u32 pad5; | |
58 | u32 int_credit_return; /* 0x30 */ | |
59 | u32 pad6; | |
60 | }; | |
61 | ||
62 | struct vnic_intr { | |
63 | unsigned int index; | |
64 | struct vnic_dev *vdev; | |
65 | struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ | |
66 | }; | |
67 | ||
68 | static inline void vnic_intr_unmask(struct vnic_intr *intr) | |
69 | { | |
70 | iowrite32(0, &intr->ctrl->mask); | |
71 | } | |
72 | ||
73 | static inline void vnic_intr_mask(struct vnic_intr *intr) | |
74 | { | |
75 | iowrite32(1, &intr->ctrl->mask); | |
76 | } | |
77 | ||
78 | static inline void vnic_intr_return_credits(struct vnic_intr *intr, | |
79 | unsigned int credits, int unmask, int reset_timer) | |
80 | { | |
81 | #define VNIC_INTR_UNMASK_SHIFT 16 | |
82 | #define VNIC_INTR_RESET_TIMER_SHIFT 17 | |
83 | ||
84 | u32 int_credit_return = (credits & 0xffff) | | |
85 | (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | | |
86 | (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); | |
87 | ||
88 | iowrite32(int_credit_return, &intr->ctrl->int_credit_return); | |
89 | } | |
90 | ||
91 | static inline unsigned int vnic_intr_credits(struct vnic_intr *intr) | |
92 | { | |
93 | return ioread32(&intr->ctrl->int_credits); | |
94 | } | |
95 | ||
96 | static inline void vnic_intr_return_all_credits(struct vnic_intr *intr) | |
97 | { | |
98 | unsigned int credits = vnic_intr_credits(intr); | |
99 | int unmask = 1; | |
100 | int reset_timer = 1; | |
101 | ||
102 | vnic_intr_return_credits(intr, credits, unmask, reset_timer); | |
103 | } | |
104 | ||
105 | static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba) | |
106 | { | |
107 | /* read PBA without clearing */ | |
108 | return ioread32(legacy_pba); | |
109 | } | |
110 | ||
111 | void vnic_intr_free(struct vnic_intr *intr); | |
112 | int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, | |
113 | unsigned int index); | |
114 | void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, | |
115 | unsigned int coalescing_type, unsigned int mask_on_assertion); | |
116 | void vnic_intr_clean(struct vnic_intr *intr); | |
117 | ||
118 | #endif /* _VNIC_INTR_H_ */ |