1#ifndef __LIBSRP_H__
2#define __LIBSRP_H__
3
4#include <linux/list.h>
5#include <scsi/scsi_cmnd.h>
6#include <scsi/scsi_host.h>
7#include <scsi/srp.h>
8
9enum iue_flags {
10	V_DIOVER,
11	V_WRITE,
12	V_LINKED,
13	V_FLYING,
14};
15
16struct srp_buf {
17	dma_addr_t dma;
18	void *buf;
19};
20
21struct srp_queue {
22	void *pool;
23	void *items;
24	struct kfifo *queue;
25	spinlock_t lock;
26};
27
28struct srp_target {
29	struct Scsi_Host *shost;
30	struct device *dev;
31
32	spinlock_t lock;
33	struct list_head cmd_queue;
34
35	size_t srp_iu_size;
36	struct srp_queue iu_queue;
37	size_t rx_ring_size;
38	struct srp_buf **rx_ring;
39
40	void *ldata;
41};
42
43struct iu_entry {
44	struct srp_target *target;
45
46	struct list_head ilist;
47	dma_addr_t remote_token;
48	unsigned long flags;
49
50	struct srp_buf *sbuf;
51};
52
53typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
54			 struct srp_direct_buf *, int,
55			 enum dma_data_direction, unsigned int);
56extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
57extern void srp_target_free(struct srp_target *);
58
59extern struct iu_entry *srp_iu_get(struct srp_target *);
60extern void srp_iu_put(struct iu_entry *);
61
62extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64);
63extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
64			     srp_rdma_t, int, int);
65
66
67static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
68{
69	return (struct srp_target *) host->hostdata;
70}
71
72static inline int srp_cmd_direction(struct srp_cmd *cmd)
73{
74	return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
75}
76
77#endif
78