1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
10 /* Completion queue control */
12 u64 ring_base; /* 0x00 */
13 u32 ring_size; /* 0x08 */
15 u32 flow_control_enable; /* 0x10 */
17 u32 color_enable; /* 0x18 */
19 u32 cq_head; /* 0x20 */
21 u32 cq_tail; /* 0x28 */
23 u32 cq_tail_color; /* 0x30 */
25 u32 interrupt_enable; /* 0x38 */
27 u32 cq_entry_enable; /* 0x40 */
29 u32 cq_message_enable; /* 0x48 */
31 u32 interrupt_offset; /* 0x50 */
33 u64 cq_message_addr; /* 0x58 */
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;
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),
52 struct cq_desc *cq_desc;
53 unsigned int work_done = 0;
54 u16 q_number, completed_index;
57 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
58 cq->ring.desc_size * cq->to_clean);
59 cq_desc_dec(cq_desc, &type, &color,
60 &q_number, &completed_index);
62 while (color != cq->last_color) {
64 if ((*q_service)(cq->vdev, cq_desc, type,
65 q_number, completed_index, opaque))
69 if (cq->to_clean == cq->ring.desc_count) {
71 cq->last_color = cq->last_color ? 0 : 1;
74 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
75 cq->ring.desc_size * cq->to_clean);
76 cq_desc_dec(cq_desc, &type, &color,
77 &q_number, &completed_index);
80 if (work_done >= work_to_do)
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_ */