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_CQ_H_ |
8 | #define _VNIC_CQ_H_ |
9 | |
10 | #include "cq_desc.h" |
11 | #include "vnic_dev.h" |
12 | |
13 | /* Completion queue control */ |
14 | struct vnic_cq_ctrl { |
15 | u64 ring_base; /* 0x00 */ |
16 | u32 ring_size; /* 0x08 */ |
17 | u32 pad0; |
18 | u32 flow_control_enable; /* 0x10 */ |
19 | u32 pad1; |
20 | u32 color_enable; /* 0x18 */ |
21 | u32 pad2; |
22 | u32 cq_head; /* 0x20 */ |
23 | u32 pad3; |
24 | u32 cq_tail; /* 0x28 */ |
25 | u32 pad4; |
26 | u32 cq_tail_color; /* 0x30 */ |
27 | u32 pad5; |
28 | u32 interrupt_enable; /* 0x38 */ |
29 | u32 pad6; |
30 | u32 cq_entry_enable; /* 0x40 */ |
31 | u32 pad7; |
32 | u32 cq_message_enable; /* 0x48 */ |
33 | u32 pad8; |
34 | u32 interrupt_offset; /* 0x50 */ |
35 | u32 pad9; |
36 | u64 cq_message_addr; /* 0x58 */ |
37 | u32 pad10; |
38 | }; |
39 | |
40 | struct vnic_rx_bytes_counter { |
41 | unsigned int small_pkt_bytes_cnt; |
42 | unsigned int large_pkt_bytes_cnt; |
43 | }; |
44 | |
45 | struct vnic_cq { |
46 | unsigned int index; |
47 | struct vnic_dev *vdev; |
48 | struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */ |
49 | struct vnic_dev_ring ring; |
50 | unsigned int to_clean; |
51 | unsigned int last_color; |
52 | unsigned int interrupt_offset; |
53 | struct vnic_rx_bytes_counter pkt_size_counter; |
54 | unsigned int cur_rx_coal_timeval; |
55 | unsigned int tobe_rx_coal_timeval; |
56 | ktime_t prev_ts; |
57 | }; |
58 | |
59 | static inline unsigned int vnic_cq_service(struct vnic_cq *cq, |
60 | unsigned int work_to_do, |
61 | int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
62 | u8 type, u16 q_number, u16 completed_index, void *opaque), |
63 | void *opaque) |
64 | { |
65 | struct cq_desc *cq_desc; |
66 | unsigned int work_done = 0; |
67 | u16 q_number, completed_index; |
68 | u8 type, color; |
69 | |
70 | cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
71 | cq->ring.desc_size * cq->to_clean); |
72 | cq_desc_dec(desc_arg: cq_desc, type: &type, color: &color, |
73 | q_number: &q_number, completed_index: &completed_index); |
74 | |
75 | while (color != cq->last_color) { |
76 | |
77 | if ((*q_service)(cq->vdev, cq_desc, type, |
78 | q_number, completed_index, opaque)) |
79 | break; |
80 | |
81 | cq->to_clean++; |
82 | if (cq->to_clean == cq->ring.desc_count) { |
83 | cq->to_clean = 0; |
84 | cq->last_color = cq->last_color ? 0 : 1; |
85 | } |
86 | |
87 | cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
88 | cq->ring.desc_size * cq->to_clean); |
89 | cq_desc_dec(desc_arg: cq_desc, type: &type, color: &color, |
90 | q_number: &q_number, completed_index: &completed_index); |
91 | |
92 | work_done++; |
93 | if (work_done >= work_to_do) |
94 | break; |
95 | } |
96 | |
97 | return work_done; |
98 | } |
99 | |
100 | void vnic_cq_free(struct vnic_cq *cq); |
101 | int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, |
102 | unsigned int desc_count, unsigned int desc_size); |
103 | void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, |
104 | unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, |
105 | unsigned int cq_tail_color, unsigned int interrupt_enable, |
106 | unsigned int cq_entry_enable, unsigned int message_enable, |
107 | unsigned int interrupt_offset, u64 message_addr); |
108 | void vnic_cq_clean(struct vnic_cq *cq); |
109 | |
110 | #endif /* _VNIC_CQ_H_ */ |
111 | |