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gerrit-public.fairphone.software / kernel / msm-4.9 / c43846a91fc2aeb8f8f519f71324f3bec91bb62f / . / include / scsi / libsrp.h
blob: f4105c91af532d05de69b80cf513f52392b1a4a6 [file] [log] [blame]
FUJITA Tomonori26b14822006-12-01 03:00:50 +0900[diff] [blame]1#ifndef __LIBSRP_H__
2#define __LIBSRP_H__
3
4#include <linux/list.h>
James Bottomley75c85a02009-12-30 13:21:06 -0600[diff] [blame]5#include <linux/kfifo.h>
FUJITA Tomonori26b14822006-12-01 03:00:50 +0900[diff] [blame]6#include <scsi/scsi_cmnd.h>
7#include <scsi/scsi_host.h>
8#include <scsi/srp.h>
9
10enum iue_flags {
11 V_DIOVER,
12 V_WRITE,
13 V_LINKED,
14 V_FLYING,
15};
16
17struct srp_buf {
18 dma_addr_t dma;
19 void *buf;
20};
21
22struct srp_queue {
23 void *pool;
24 void *items;
Stefani Seibold45465482009-12-21 14:37:26 -0800[diff] [blame]25 struct kfifo queue;
FUJITA Tomonori26b14822006-12-01 03:00:50 +0900[diff] [blame]26 spinlock_t lock;
27};
28
29struct srp_target {
30 struct Scsi_Host *shost;
31 struct device *dev;
32
33 spinlock_t lock;
34 struct list_head cmd_queue;
35
36 size_t srp_iu_size;
37 struct srp_queue iu_queue;
38 size_t rx_ring_size;
39 struct srp_buf **rx_ring;
40
41 void *ldata;
42};
43
44struct iu_entry {
45 struct srp_target *target;
46
47 struct list_head ilist;
48 dma_addr_t remote_token;
49 unsigned long flags;
50
51 struct srp_buf *sbuf;
52};
53
54typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
55 struct srp_direct_buf *, int,
56 enum dma_data_direction, unsigned int);
57extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
58extern void srp_target_free(struct srp_target *);
59
60extern struct iu_entry *srp_iu_get(struct srp_target *);
61extern void srp_iu_put(struct iu_entry *);
62
FUJITA Tomonori17b0bcf2007-07-11 15:08:21 +0900[diff] [blame]63extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64);
FUJITA Tomonori26b14822006-12-01 03:00:50 +0900[diff] [blame]64extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
65 srp_rdma_t, int, int);
66
67
68static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
69{
70 return (struct srp_target *) host->hostdata;
71}
72
73static inline int srp_cmd_direction(struct srp_cmd *cmd)
74{
75 return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
76}
77
78#endif