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- /* SPDX-License-Identifier: GPL-2.0-only */
- /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
- #ifndef _VNIC_CQ_H_
- #define _VNIC_CQ_H_
- #include "cq_desc.h"
- #include "vnic_dev.h"
- /* Completion queue control */
- struct vnic_cq_ctrl {
- u64 ring_base; /* 0x00 */
- u32 ring_size; /* 0x08 */
- u32 pad0;
- u32 flow_control_enable; /* 0x10 */
- u32 pad1;
- u32 color_enable; /* 0x18 */
- u32 pad2;
- u32 cq_head; /* 0x20 */
- u32 pad3;
- u32 cq_tail; /* 0x28 */
- u32 pad4;
- u32 cq_tail_color; /* 0x30 */
- u32 pad5;
- u32 interrupt_enable; /* 0x38 */
- u32 pad6;
- u32 cq_entry_enable; /* 0x40 */
- u32 pad7;
- u32 cq_message_enable; /* 0x48 */
- u32 pad8;
- u32 interrupt_offset; /* 0x50 */
- u32 pad9;
- u64 cq_message_addr; /* 0x58 */
- u32 pad10;
- };
- struct vnic_cq {
- unsigned int index;
- struct vnic_dev *vdev;
- struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
- struct vnic_dev_ring ring;
- unsigned int to_clean;
- unsigned int last_color;
- };
- static inline unsigned int svnic_cq_service(struct vnic_cq *cq,
- unsigned int work_to_do,
- int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
- u8 type, u16 q_number, u16 completed_index, void *opaque),
- void *opaque)
- {
- struct cq_desc *cq_desc;
- unsigned int work_done = 0;
- u16 q_number, completed_index;
- u8 type, color;
- cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
- cq->ring.desc_size * cq->to_clean);
- cq_desc_dec(cq_desc, &type, &color,
- &q_number, &completed_index);
- while (color != cq->last_color) {
- if ((*q_service)(cq->vdev, cq_desc, type,
- q_number, completed_index, opaque))
- break;
- cq->to_clean++;
- if (cq->to_clean == cq->ring.desc_count) {
- cq->to_clean = 0;
- cq->last_color = cq->last_color ? 0 : 1;
- }
- cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
- cq->ring.desc_size * cq->to_clean);
- cq_desc_dec(cq_desc, &type, &color,
- &q_number, &completed_index);
- work_done++;
- if (work_done >= work_to_do)
- break;
- }
- return work_done;
- }
- void svnic_cq_free(struct vnic_cq *cq);
- int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
- unsigned int index, unsigned int desc_count, unsigned int desc_size);
- void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
- unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
- unsigned int cq_tail_color, unsigned int interrupt_enable,
- unsigned int cq_entry_enable, unsigned int message_enable,
- unsigned int interrupt_offset, u64 message_addr);
- void svnic_cq_clean(struct vnic_cq *cq);
- #endif /* _VNIC_CQ_H_ */
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