[SCSI] Add spi_populate_*_msg functions

Introduce new helpers:
 - spi_populate_width_msg()
 - spi_populate_sync_msg()
 - spi_populate_ppr_msg()

and use them in drivers which already enable the SPI transport.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/scsi/scsi_transport_spi.h b/include/scsi/scsi_transport_spi.h
index fb5a2ffae939..5e1d61913d4e 100644
--- a/include/scsi/scsi_transport_spi.h
+++ b/include/scsi/scsi_transport_spi.h
@@ -148,5 +148,9 @@ void spi_schedule_dv_device(struct scsi_device *);
 void spi_dv_device(struct scsi_device *);
 void spi_display_xfer_agreement(struct scsi_target *);
 int spi_print_msg(const unsigned char *);
+int spi_populate_width_msg(unsigned char *msg, int width);
+int spi_populate_sync_msg(unsigned char *msg, int period, int offset);
+int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width,
+                int options);
 
 #endif /* SCSI_TRANSPORT_SPI_H */