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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6#ifndef _VNIC_CQ_H_7#define _VNIC_CQ_H_8 9#include "cq_desc.h"10#include "vnic_dev.h"11 12/*13 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth14 * Driver) when both are built with CONFIG options =y15 */16#define vnic_cq_service fnic_cq_service17#define vnic_cq_free fnic_cq_free18#define vnic_cq_alloc fnic_cq_alloc19#define vnic_cq_init fnic_cq_init20#define vnic_cq_clean fnic_cq_clean21 22/* Completion queue control */23struct vnic_cq_ctrl {24 u64 ring_base; /* 0x00 */25 u32 ring_size; /* 0x08 */26 u32 pad0;27 u32 flow_control_enable; /* 0x10 */28 u32 pad1;29 u32 color_enable; /* 0x18 */30 u32 pad2;31 u32 cq_head; /* 0x20 */32 u32 pad3;33 u32 cq_tail; /* 0x28 */34 u32 pad4;35 u32 cq_tail_color; /* 0x30 */36 u32 pad5;37 u32 interrupt_enable; /* 0x38 */38 u32 pad6;39 u32 cq_entry_enable; /* 0x40 */40 u32 pad7;41 u32 cq_message_enable; /* 0x48 */42 u32 pad8;43 u32 interrupt_offset; /* 0x50 */44 u32 pad9;45 u64 cq_message_addr; /* 0x58 */46 u32 pad10;47};48 49struct vnic_cq {50 unsigned int index;51 struct vnic_dev *vdev;52 struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */53 struct vnic_dev_ring ring;54 unsigned int to_clean;55 unsigned int last_color;56};57 58static inline unsigned int vnic_cq_service(struct vnic_cq *cq,59 unsigned int work_to_do,60 int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,61 u8 type, u16 q_number, u16 completed_index, void *opaque),62 void *opaque)63{64 struct cq_desc *cq_desc;65 unsigned int work_done = 0;66 u16 q_number, completed_index;67 u8 type, color;68 69 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +70 cq->ring.desc_size * cq->to_clean);71 cq_desc_dec(cq_desc, &type, &color,72 &q_number, &completed_index);73 74 while (color != cq->last_color) {75 76 if ((*q_service)(cq->vdev, cq_desc, type,77 q_number, completed_index, opaque))78 break;79 80 cq->to_clean++;81 if (cq->to_clean == cq->ring.desc_count) {82 cq->to_clean = 0;83 cq->last_color = cq->last_color ? 0 : 1;84 }85 86 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +87 cq->ring.desc_size * cq->to_clean);88 cq_desc_dec(cq_desc, &type, &color,89 &q_number, &completed_index);90 91 work_done++;92 if (work_done >= work_to_do)93 break;94 }95 96 return work_done;97}98 99void vnic_cq_free(struct vnic_cq *cq);100int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,101 unsigned int desc_count, unsigned int desc_size);102void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,103 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,104 unsigned int cq_tail_color, unsigned int interrupt_enable,105 unsigned int cq_entry_enable, unsigned int message_enable,106 unsigned int interrupt_offset, u64 message_addr);107void vnic_cq_clean(struct vnic_cq *cq);108 109#endif /* _VNIC_CQ_H_ */110