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1 | #ifndef __LIBSRP_H__ |
2 | #define __LIBSRP_H__ |
3 | |
4 | #include <linux/list.h> |
5 | #include <linux/kfifo.h> |
6 | #include <scsi/scsi_cmnd.h> |
7 | #include <scsi/scsi_host.h> |
8 | #include <scsi/srp.h> |
9 | |
10 | enum iue_flags { |
11 | V_DIOVER, |
12 | V_WRITE, |
13 | V_LINKED, |
14 | V_FLYING, |
15 | }; |
16 | |
17 | struct srp_buf { |
18 | dma_addr_t dma; |
19 | void *buf; |
20 | }; |
21 | |
22 | struct srp_queue { |
23 | void *pool; |
24 | void *items; |
25 | struct kfifo queue; |
26 | spinlock_t lock; |
27 | }; |
28 | |
29 | struct 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 | |
44 | struct 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 | |
54 | typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int, |
55 | struct srp_direct_buf *, int, |
56 | enum dma_data_direction, unsigned int); |
57 | extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t); |
58 | extern void srp_target_free(struct srp_target *); |
59 | |
60 | extern struct iu_entry *srp_iu_get(struct srp_target *); |
61 | extern void srp_iu_put(struct iu_entry *); |
62 | |
63 | extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64); |
64 | extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *, |
65 | srp_rdma_t, int, int); |
66 | |
67 | |
68 | static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host) |
69 | { |
70 | return (struct srp_target *) host->hostdata; |
71 | } |
72 | |
73 | static 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 |
79 |
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