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 */ 14 struct 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 40 struct vnic_rx_bytes_counter { 41 unsigned int small_pkt_bytes_cnt; 42 unsigned int large_pkt_bytes_cnt; 43 }; 44 45 struct 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 59 static 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 } 99 100 void vnic_cq_free(struct vnic_cq *cq); 101 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, 102 unsigned int desc_count, unsigned int desc_size); 103 void 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); 108 void vnic_cq_clean(struct vnic_cq *cq); 109 110 #endif /* _VNIC_CQ_H_ */ 111