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 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; 25 struct kfifo queue; 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 63extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64); 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 79