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123 lines
3.4 KiB
123 lines
3.4 KiB
/* |
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* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. |
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* Copyright 2007 Nuova Systems, Inc. All rights reserved. |
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* |
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* This program is free software; you may redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; version 2 of the License. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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*/ |
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#ifndef _VNIC_CQ_H_ |
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#define _VNIC_CQ_H_ |
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#include "cq_desc.h" |
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#include "vnic_dev.h" |
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/* Completion queue control */ |
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struct vnic_cq_ctrl { |
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u64 ring_base; /* 0x00 */ |
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u32 ring_size; /* 0x08 */ |
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u32 pad0; |
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u32 flow_control_enable; /* 0x10 */ |
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u32 pad1; |
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u32 color_enable; /* 0x18 */ |
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u32 pad2; |
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u32 cq_head; /* 0x20 */ |
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u32 pad3; |
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u32 cq_tail; /* 0x28 */ |
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u32 pad4; |
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u32 cq_tail_color; /* 0x30 */ |
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u32 pad5; |
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u32 interrupt_enable; /* 0x38 */ |
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u32 pad6; |
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u32 cq_entry_enable; /* 0x40 */ |
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u32 pad7; |
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u32 cq_message_enable; /* 0x48 */ |
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u32 pad8; |
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u32 interrupt_offset; /* 0x50 */ |
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u32 pad9; |
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u64 cq_message_addr; /* 0x58 */ |
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u32 pad10; |
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}; |
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struct vnic_rx_bytes_counter { |
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unsigned int small_pkt_bytes_cnt; |
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unsigned int large_pkt_bytes_cnt; |
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}; |
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struct vnic_cq { |
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unsigned int index; |
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struct vnic_dev *vdev; |
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struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */ |
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struct vnic_dev_ring ring; |
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unsigned int to_clean; |
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unsigned int last_color; |
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unsigned int interrupt_offset; |
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struct vnic_rx_bytes_counter pkt_size_counter; |
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unsigned int cur_rx_coal_timeval; |
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unsigned int tobe_rx_coal_timeval; |
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ktime_t prev_ts; |
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}; |
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static inline unsigned int vnic_cq_service(struct vnic_cq *cq, |
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unsigned int work_to_do, |
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int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
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u8 type, u16 q_number, u16 completed_index, void *opaque), |
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void *opaque) |
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{ |
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struct cq_desc *cq_desc; |
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unsigned int work_done = 0; |
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u16 q_number, completed_index; |
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u8 type, color; |
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cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
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cq->ring.desc_size * cq->to_clean); |
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cq_desc_dec(cq_desc, &type, &color, |
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&q_number, &completed_index); |
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while (color != cq->last_color) { |
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if ((*q_service)(cq->vdev, cq_desc, type, |
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q_number, completed_index, opaque)) |
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break; |
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cq->to_clean++; |
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if (cq->to_clean == cq->ring.desc_count) { |
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cq->to_clean = 0; |
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cq->last_color = cq->last_color ? 0 : 1; |
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} |
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cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + |
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cq->ring.desc_size * cq->to_clean); |
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cq_desc_dec(cq_desc, &type, &color, |
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&q_number, &completed_index); |
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work_done++; |
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if (work_done >= work_to_do) |
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break; |
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} |
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return work_done; |
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} |
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void vnic_cq_free(struct vnic_cq *cq); |
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int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, |
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unsigned int desc_count, unsigned int desc_size); |
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void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, |
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unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, |
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unsigned int cq_tail_color, unsigned int interrupt_enable, |
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unsigned int cq_entry_enable, unsigned int message_enable, |
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unsigned int interrupt_offset, u64 message_addr); |
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void vnic_cq_clean(struct vnic_cq *cq); |
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#endif /* _VNIC_CQ_H_ */
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