1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */ |
3 | |
4 | #ifndef _VNIC_CQ_H_ |
5 | #define _VNIC_CQ_H_ |
6 | |
7 | #include "cq_desc.h" |
8 | #include "vnic_dev.h" |
9 | |
10 | /* Completion queue control */ |
11 | struct vnic_cq_ctrl { |
12 | u64 ring_base; /* 0x00 */ |
13 | u32 ring_size; /* 0x08 */ |
14 | u32 pad0; |
15 | u32 flow_control_enable; /* 0x10 */ |
16 | u32 pad1; |
17 | u32 color_enable; /* 0x18 */ |
18 | u32 pad2; |
19 | u32 cq_head; /* 0x20 */ |
20 | u32 pad3; |
21 | u32 cq_tail; /* 0x28 */ |
22 | u32 pad4; |
23 | u32 cq_tail_color; /* 0x30 */ |
24 | u32 pad5; |
25 | u32 interrupt_enable; /* 0x38 */ |
26 | u32 pad6; |
27 | u32 cq_entry_enable; /* 0x40 */ |
28 | u32 pad7; |
29 | u32 cq_message_enable; /* 0x48 */ |
30 | u32 pad8; |
31 | u32 interrupt_offset; /* 0x50 */ |
32 | u32 pad9; |
33 | u64 cq_message_addr; /* 0x58 */ |
34 | u32 pad10; |
35 | }; |
36 | |
37 | struct vnic_cq { |
38 | unsigned int index; |
39 | struct vnic_dev *vdev; |
40 | struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */ |
41 | struct vnic_dev_ring ring; |
42 | unsigned int to_clean; |
43 | unsigned int last_color; |
44 | }; |
45 | |
46 | static inline unsigned int svnic_cq_service(struct vnic_cq *cq, |
47 | unsigned int work_to_do, |
48 | int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
49 | u8 type, u16 q_number, u16 completed_index, void *opaque), |
50 | void *opaque) |
51 | { |
52 | struct cq_desc *cq_desc; |
53 | unsigned int work_done = 0; |
54 | u16 q_number, completed_index; |
55 | u8 type, color; |
56 | |
57 | cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
58 | cq->ring.desc_size * cq->to_clean); |
59 | cq_desc_dec(desc_arg: cq_desc, type: &type, color: &color, |
60 | q_number: &q_number, completed_index: &completed_index); |
61 | |
62 | while (color != cq->last_color) { |
63 | |
64 | if ((*q_service)(cq->vdev, cq_desc, type, |
65 | q_number, completed_index, opaque)) |
66 | break; |
67 | |
68 | cq->to_clean++; |
69 | if (cq->to_clean == cq->ring.desc_count) { |
70 | cq->to_clean = 0; |
71 | cq->last_color = cq->last_color ? 0 : 1; |
72 | } |
73 | |
74 | cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
75 | cq->ring.desc_size * cq->to_clean); |
76 | cq_desc_dec(desc_arg: cq_desc, type: &type, color: &color, |
77 | q_number: &q_number, completed_index: &completed_index); |
78 | |
79 | work_done++; |
80 | if (work_done >= work_to_do) |
81 | break; |
82 | } |
83 | |
84 | return work_done; |
85 | } |
86 | |
87 | void svnic_cq_free(struct vnic_cq *cq); |
88 | int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, |
89 | unsigned int index, unsigned int desc_count, unsigned int desc_size); |
90 | void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, |
91 | unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, |
92 | unsigned int cq_tail_color, unsigned int interrupt_enable, |
93 | unsigned int cq_entry_enable, unsigned int message_enable, |
94 | unsigned int interrupt_offset, u64 message_addr); |
95 | void svnic_cq_clean(struct vnic_cq *cq); |
96 | #endif /* _VNIC_CQ_H_ */ |
97 | |