linux/drivers/scsi/fnic/vnic_rq.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */
#ifndef _VNIC_RQ_H_
#define _VNIC_RQ_H_

#include <linux/pci.h>
#include "vnic_dev.h"
#include "vnic_cq.h"

/*
 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
 * Driver) when both are built with CONFIG options =y
 */
#define vnic_rq_desc_avail …
#define vnic_rq_desc_used …
#define vnic_rq_next_desc …
#define vnic_rq_next_index …
#define vnic_rq_next_buf_index …
#define vnic_rq_post …
#define vnic_rq_posting_soon …
#define vnic_rq_return_descs …
#define vnic_rq_service …
#define vnic_rq_fill …
#define vnic_rq_free …
#define vnic_rq_alloc …
#define vnic_rq_init …
#define vnic_rq_error_status …
#define vnic_rq_enable …
#define vnic_rq_disable …
#define vnic_rq_clean …

/* Receive queue control */
struct vnic_rq_ctrl { … };

/* Break the vnic_rq_buf allocations into blocks of 64 entries */
#define VNIC_RQ_BUF_BLK_ENTRIES …
#define VNIC_RQ_BUF_BLK_SZ …
#define VNIC_RQ_BUF_BLKS_NEEDED(entries) …
#define VNIC_RQ_BUF_BLKS_MAX …

struct vnic_rq_buf { … };

struct vnic_rq { … };

static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
{ … }

static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
{ … }

static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
{ … }

static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
{ … }

static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
{ … }

static inline void vnic_rq_post(struct vnic_rq *rq,
	void *os_buf, unsigned int os_buf_index,
	dma_addr_t dma_addr, unsigned int len)
{ … }

static inline int vnic_rq_posting_soon(struct vnic_rq *rq)
{ … }

static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
{ … }

enum desc_return_options { … };

static inline void vnic_rq_service(struct vnic_rq *rq,
	struct cq_desc *cq_desc, u16 completed_index,
	int desc_return, void (*buf_service)(struct vnic_rq *rq,
	struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
	int skipped, void *opaque), void *opaque)
{ … }

static inline int vnic_rq_fill(struct vnic_rq *rq,
	int (*buf_fill)(struct vnic_rq *rq))
{ … }

void vnic_rq_free(struct vnic_rq *rq);
int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
	unsigned int desc_count, unsigned int desc_size);
void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
	unsigned int error_interrupt_enable,
	unsigned int error_interrupt_offset);
unsigned int vnic_rq_error_status(struct vnic_rq *rq);
void vnic_rq_enable(struct vnic_rq *rq);
int vnic_rq_disable(struct vnic_rq *rq);
void vnic_rq_clean(struct vnic_rq *rq,
	void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));

#endif /* _VNIC_RQ_H_ */