mirror of
https://github.com/SCST-project/scst.git
synced 2026-08-19 13:46:25 +00:00
Bart Van Assche
6a125e268c
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@2742 d57e44dd-8a1f-0410-8b47-8ef2f437770f
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
#ifndef __LIBSRP_H__
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#define __LIBSRP_H__
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#include <linux/list.h>
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#include <linux/kfifo.h>
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#ifdef INSIDE_KERNEL_TREE
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#include <scst/scst.h>
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#else
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#include "scst.h"
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#endif
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#include <scsi/srp.h>
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struct srp_buf {
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dma_addr_t dma;
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void *buf;
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};
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struct srp_queue {
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void *pool;
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void *items;
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
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struct kfifo *queue;
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#else
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struct kfifo queue;
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#endif
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spinlock_t lock;
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};
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struct srp_target {
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struct scst_tgt *tgt;
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struct device *dev;
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spinlock_t lock;
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size_t srp_iu_size;
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struct srp_queue iu_queue;
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size_t rx_ring_size;
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struct srp_buf **rx_ring;
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void *ldata;
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};
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struct iu_entry {
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struct srp_target *target;
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dma_addr_t remote_token;
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unsigned long flags;
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struct srp_buf *sbuf;
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};
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typedef int (srp_rdma_t)(struct scst_cmd *, struct scatterlist *, int,
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struct srp_direct_buf *, int,
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enum dma_data_direction, unsigned int);
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extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
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extern void srp_target_free(struct srp_target *);
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extern struct iu_entry *srp_iu_get(struct srp_target *);
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extern void srp_iu_put(struct iu_entry *);
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extern int srp_data_length(struct srp_cmd *, enum dma_data_direction);
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extern int srp_cmd_queue(struct scst_session *, struct srp_cmd *, void *, int);
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extern int srp_transfer_data(struct scst_cmd *, struct srp_cmd *,
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srp_rdma_t, int, int);
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static inline int srp_cmd_direction(struct srp_cmd *cmd)
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{
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return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
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}
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#endif
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