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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 */
18struct 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
35struct vnic_intr {
36 unsigned int index;
37 struct vnic_dev *vdev;
38 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
39};
40
41static inline void vnic_intr_unmask(struct vnic_intr *intr)
42{
43 iowrite32(0, &intr->ctrl->mask);
44}
45
46static inline void vnic_intr_mask(struct vnic_intr *intr)
47{
48 iowrite32(1, &intr->ctrl->mask);
49}
50
51static inline int vnic_intr_masked(struct vnic_intr *intr)
52{
53 return ioread32(&intr->ctrl->mask);
54}
55
56static 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
69static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
70{
71 return ioread32(&intr->ctrl->int_credits);
72}
73
74static 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
83static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
84{
85 /* read PBA without clearing */
86 return ioread32(legacy_pba);
87}
88
89void vnic_intr_free(struct vnic_intr *intr);
90int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
91 unsigned int index);
92void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
93 unsigned int coalescing_type, unsigned int mask_on_assertion);
94void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
95 u32 coalescing_timer);
96void vnic_intr_clean(struct vnic_intr *intr);
97
98#endif /* _VNIC_INTR_H_ */
1/*
2 * Copyright 2008-2010 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 */
19
20#ifndef _VNIC_INTR_H_
21#define _VNIC_INTR_H_
22
23#include <linux/pci.h>
24
25#include "vnic_dev.h"
26
27#define VNIC_INTR_TIMER_TYPE_ABS 0
28#define VNIC_INTR_TIMER_TYPE_QUIET 1
29
30/* Interrupt control */
31struct vnic_intr_ctrl {
32 u32 coalescing_timer; /* 0x00 */
33 u32 pad0;
34 u32 coalescing_value; /* 0x08 */
35 u32 pad1;
36 u32 coalescing_type; /* 0x10 */
37 u32 pad2;
38 u32 mask_on_assertion; /* 0x18 */
39 u32 pad3;
40 u32 mask; /* 0x20 */
41 u32 pad4;
42 u32 int_credits; /* 0x28 */
43 u32 pad5;
44 u32 int_credit_return; /* 0x30 */
45 u32 pad6;
46};
47
48struct vnic_intr {
49 unsigned int index;
50 struct vnic_dev *vdev;
51 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
52};
53
54static inline void vnic_intr_unmask(struct vnic_intr *intr)
55{
56 iowrite32(0, &intr->ctrl->mask);
57}
58
59static inline void vnic_intr_mask(struct vnic_intr *intr)
60{
61 iowrite32(1, &intr->ctrl->mask);
62}
63
64static inline int vnic_intr_masked(struct vnic_intr *intr)
65{
66 return ioread32(&intr->ctrl->mask);
67}
68
69static inline void vnic_intr_return_credits(struct vnic_intr *intr,
70 unsigned int credits, int unmask, int reset_timer)
71{
72#define VNIC_INTR_UNMASK_SHIFT 16
73#define VNIC_INTR_RESET_TIMER_SHIFT 17
74
75 u32 int_credit_return = (credits & 0xffff) |
76 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
77 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
78
79 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
80}
81
82static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
83{
84 return ioread32(&intr->ctrl->int_credits);
85}
86
87static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
88{
89 unsigned int credits = vnic_intr_credits(intr);
90 int unmask = 1;
91 int reset_timer = 1;
92
93 vnic_intr_return_credits(intr, credits, unmask, reset_timer);
94}
95
96static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
97{
98 /* read PBA without clearing */
99 return ioread32(legacy_pba);
100}
101
102void vnic_intr_free(struct vnic_intr *intr);
103int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
104 unsigned int index);
105void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
106 unsigned int coalescing_type, unsigned int mask_on_assertion);
107void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
108 u32 coalescing_timer);
109void vnic_intr_clean(struct vnic_intr *intr);
110
111#endif /* _VNIC_INTR_H_ */