cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/ethernet/cisco/enic/vnic_cq.h

/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#ifndef _VNIC_CQ_H_

#define _VNIC_CQ_H_

#include "cq_desc.h"
#include "vnic_dev.h"

/* Completion queue control */

struct vnic_cq_ctrl {
	
u64 ring_base;			/* 0x00 */
	
u32 ring_size;			/* 0x08 */
	
u32 pad0;
	
u32 flow_control_enable;	/* 0x10 */
	
u32 pad1;
	
u32 color_enable;		/* 0x18 */
	
u32 pad2;
	
u32 cq_head;			/* 0x20 */
	
u32 pad3;
	
u32 cq_tail;			/* 0x28 */
	
u32 pad4;
	
u32 cq_tail_color;		/* 0x30 */
	
u32 pad5;
	
u32 interrupt_enable;		/* 0x38 */
	
u32 pad6;
	
u32 cq_entry_enable;		/* 0x40 */
	
u32 pad7;
	
u32 cq_message_enable;		/* 0x48 */
	
u32 pad8;
	
u32 interrupt_offset;		/* 0x50 */
	
u32 pad9;
	
u64 cq_message_addr;		/* 0x58 */
	
u32 pad10;
};


struct vnic_rx_bytes_counter {
	
unsigned int small_pkt_bytes_cnt;
	
unsigned int large_pkt_bytes_cnt;
};


struct vnic_cq {
	
unsigned int index;
	
struct vnic_dev *vdev;
	
struct vnic_cq_ctrl __iomem *ctrl;              /* memory-mapped */
	
struct vnic_dev_ring ring;
	
unsigned int to_clean;
	
unsigned int last_color;
	
unsigned int interrupt_offset;
	
struct vnic_rx_bytes_counter pkt_size_counter;
	
unsigned int cur_rx_coal_timeval;
	
unsigned int tobe_rx_coal_timeval;
	
ktime_t prev_ts;
};


static inline unsigned int vnic_cq_service(struct vnic_cq *cq, unsigned int work_to_do, int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc, u8 type, u16 q_number, u16 completed_index, void *opaque), void *opaque) { struct cq_desc *cq_desc; unsigned int work_done = 0; u16 q_number, completed_index; u8 type, color; cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + cq->ring.desc_size * cq->to_clean); cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); while (color != cq->last_color) { if ((*q_service)(cq->vdev, cq_desc, type, q_number, completed_index, opaque)) break; cq->to_clean++; if (cq->to_clean == cq->ring.desc_count) { cq->to_clean = 0; cq->last_color = cq->last_color ? 0 : 1; } cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs + cq->ring.desc_size * cq->to_clean); cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); work_done++; if (work_done >= work_to_do) break; } return work_done; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman247100.00%1100.00%
Total247100.00%1100.00%

void vnic_cq_free(struct vnic_cq *cq); int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, unsigned int desc_count, unsigned int desc_size); void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, unsigned int cq_tail_color, unsigned int interrupt_enable, unsigned int cq_entry_enable, unsigned int message_enable, unsigned int interrupt_offset, u64 message_addr); void vnic_cq_clean(struct vnic_cq *cq); #endif /* _VNIC_CQ_H_ */

Overall Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman47493.49%125.00%
Sujith Sankar285.52%125.00%
Vasanthy Kolluri50.99%250.00%
Total507100.00%4100.00%
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