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 */
16struct 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
40struct vnic_intr {
41	unsigned int index;
42	struct vnic_dev *vdev;
43	struct vnic_res *ctrl;
44};
45
46static inline void vnic_intr_mask(struct vnic_intr *intr)
47{
48	ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 1);
49}
50
51static 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
59static inline void vnic_intr_unmask(struct vnic_intr *intr)
60{
61	ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 0);
62}
63
64static 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
77static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
78{
79	return ENIC_BUS_READ_4(intr->ctrl, INTR_CREDITS);
80}
81
82static 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
91void vnic_intr_free(struct vnic_intr *intr);
92int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
93	unsigned int index);
94void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
95	unsigned int coalescing_type, unsigned int mask_on_assertion);
96void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
97	u32 coalescing_timer);
98void vnic_intr_clean(struct vnic_intr *intr);
99
100#endif /* _VNIC_INTR_H_ */
101