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 Eth 14 * Driver) when both are built with CONFIG options =y 15 */ 16 #define vnic_cq_service fnic_cq_service 17 #define vnic_cq_free fnic_cq_free 18 #define vnic_cq_alloc fnic_cq_alloc 19 #define vnic_cq_init fnic_cq_init 20 #define vnic_cq_clean fnic_cq_clean 21 22 /* Completion queue control */ 23 struct 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 49 struct 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 58 static 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 99 void vnic_cq_free(struct vnic_cq *cq); 100 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, 101 unsigned int desc_count, unsigned int desc_size); 102 void 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); 107 void vnic_cq_clean(struct vnic_cq *cq); 108 109 #endif /* _VNIC_CQ_H_ */ 110