111 lines · c
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 */14struct 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 40struct vnic_rx_bytes_counter {41 unsigned int small_pkt_bytes_cnt;42 unsigned int large_pkt_bytes_cnt;43};44 45struct 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 59static 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(cq_desc, &type, &color,73 &q_number, &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(cq_desc, &type, &color,90 &q_number, &completed_index);91 92 work_done++;93 if (work_done >= work_to_do)94 break;95 }96 97 return work_done;98}99 100void vnic_cq_free(struct vnic_cq *cq);101int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,102 unsigned int desc_count, unsigned int desc_size);103void 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);108void vnic_cq_clean(struct vnic_cq *cq);109 110#endif /* _VNIC_CQ_H_ */111