This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / scsi / libsrp.h

diff --git a/include/scsi/libsrp.h b/include/scsi/libsrp.h
new file mode 100644 (file)
index 0000000..d143171
--- /dev/null
+++ b/include/scsi/libsrp.h
@@ -0,0 +1,77 @@
+#ifndef __LIBSRP_H__
+#define __LIBSRP_H__
+
+#include <linux/list.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/srp.h>
+
+enum iue_flags {
+       V_DIOVER,
+       V_WRITE,
+       V_LINKED,
+       V_FLYING,
+};
+
+struct srp_buf {
+       dma_addr_t dma;
+       void *buf;
+};
+
+struct srp_queue {
+       void *pool;
+       void *items;
+       struct kfifo *queue;
+       spinlock_t lock;
+};
+
+struct srp_target {
+       struct Scsi_Host *shost;
+       struct device *dev;
+
+       spinlock_t lock;
+       struct list_head cmd_queue;
+
+       size_t srp_iu_size;
+       struct srp_queue iu_queue;
+       size_t rx_ring_size;
+       struct srp_buf **rx_ring;
+
+       void *ldata;
+};
+
+struct iu_entry {
+       struct srp_target *target;
+
+       struct list_head ilist;
+       dma_addr_t remote_token;
+       unsigned long flags;
+
+       struct srp_buf *sbuf;
+};
+
+typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
+                        struct srp_direct_buf *, int,
+                        enum dma_data_direction, unsigned int);
+extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
+extern void srp_target_free(struct srp_target *);
+
+extern struct iu_entry *srp_iu_get(struct srp_target *);
+extern void srp_iu_put(struct iu_entry *);
+
+extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64);
+extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
+                            srp_rdma_t, int, int);
+
+
+static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
+{
+       return (struct srp_target *) host->hostdata;
+}
+
+static inline int srp_cmd_direction(struct srp_cmd *cmd)
+{
+       return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+}
+
+#endif