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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 */11struct 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 37struct 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 46static 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(cq_desc, &type, &color,60 &q_number, &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(cq_desc, &type, &color,77 &q_number, &completed_index);78 79 work_done++;80 if (work_done >= work_to_do)81 break;82 }83 84 return work_done;85}86 87void svnic_cq_free(struct vnic_cq *cq);88int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,89 unsigned int index, unsigned int desc_count, unsigned int desc_size);90void 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);95void svnic_cq_clean(struct vnic_cq *cq);96#endif /* _VNIC_CQ_H_ */97