* Added a read_write() function to the scsi_periph module.

* Internally, moved the contents of periph_io() into a static read_write()
  function, and use it from the new periph_read_write() as well.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36988 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/drivers/scsi_periph.h

@@ -101,6 +101,9 @@ typedef struct scsi_periph_interface {
 	status_t (*handle_free)(scsi_periph_handle handle);
 
 	// *** default implementation for block devices ***
+	status_t (*read_write)(scsi_periph_device_info *device, scsi_ccb *request,
+		uint64 offset, size_t numBlocks, physical_entry* vecs, size_t vecCount,
+		bool isWrite, size_t* _bytesTransferred);
 	status_t (*io)(scsi_periph_device device, io_operation *operation,
 		size_t *_bytesTransferred);