[SCSI] aic79xx: make driver respect nvram for IU and QAS settings

This patch allows the Adaptec firmware to pass on its values for Packetize and
QAS.  To do this, the settings max_iu and max_qas have been introduced into
the SPI transport class and populated from the adaptec NVram tables.  Domain
validation in the SPI transport class will respect the max settings when
configuring to the highest possible speed for testing.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.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 286e9628ed8b..7497a383b1a4 100644
--- a/include/scsi/scsi_transport_spi.h
+++ b/include/scsi/scsi_transport_spi.h
@@ -36,8 +36,10 @@ struct spi_transport_attrs {
         unsigned int width:1;   /* 0 - narrow, 1 - wide */
         unsigned int max_width:1;
         unsigned int iu:1;      /* Information Units enabled */
+        unsigned int max_iu:1;
         unsigned int dt:1;      /* DT clocking enabled */
         unsigned int qas:1;     /* Quick Arbitration and Selection enabled */
+        unsigned int max_qas:1;
         unsigned int wr_flow:1; /* Write Flow control enabled */
         unsigned int rd_strm:1; /* Read streaming enabled */
         unsigned int rti:1;     /* Retain Training Information */
@@ -77,8 +79,10 @@ struct spi_host_attrs {
 #define spi_width(x)    (((struct spi_transport_attrs *)&(x)->starget_data)->width)
 #define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
 #define spi_iu(x)       (((struct spi_transport_attrs *)&(x)->starget_data)->iu)
+#define spi_max_iu(x)   (((struct spi_transport_attrs *)&(x)->starget_data)->max_iu)
 #define spi_dt(x)       (((struct spi_transport_attrs *)&(x)->starget_data)->dt)
 #define spi_qas(x)      (((struct spi_transport_attrs *)&(x)->starget_data)->qas)
+#define spi_max_qas(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->max_qas)
 #define spi_wr_flow(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
 #define spi_rd_strm(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
 #define spi_rti(x)      (((struct spi_transport_attrs *)&(x)->starget_data)->rti)