Add the XPT_PATH_STATS and XPT_GDEV_STATS function codes. These ccb

types allow the reporting of error counts and other statistics.  Currently
we provide information on the last BDR or bus reset as well as active
transaction inforamtion, but this will be expanded as more information is
added to aid in error recovery.

Use the 'last reset' information to better handle bus settle delays.
Peripheral drivers now control whether a bus settle delay occurs and
for how long.  This allows target mode peripheral drivers to avoid
having their device queue frozen by the XPT for what shoudl only be
initiator type behavior.

Don't perform a bus reset if the target device is incapable of performing
transfer negotiation (e.g. Fiber Channel).

If we don't perform a bus reset but the controller is capable of transfer
negotiations, force negotiations on the first transaction to go to the
device.  This ensures that we aren't tripped up by a left over negotiation
from the prom, BIOS, loader, etc.

Add a default async handler funstion to cam_periph.c to remove duplicated
code in all initiator type peripheral drivers.

Allow mapping of XPT_CONT_TARGET_IO ccbs from userland.  They are
itentical to XPT_SCSI_IO ccbs as far as data mapping is concerned.

1 files changed, 9 insertions, 1 deletions

diff --git a/sys/cam/cam_periph.h b/sys/cam/cam_periph.h
index 9bad491..2efee41 100644
--- a/sys/cam/cam_periph.h
+++ b/sys/cam/cam_periph.h
@@ -25,7 +25,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *      $Id: cam_periph.h,v 1.2 1998/10/13 21:41:32 ken Exp $
+ *      $Id: cam_periph.h,v 1.3 1998/10/22 22:16:48 ken Exp $
  */
 
 #ifndef _CAM_CAM_PERIPH_H
@@ -130,9 +130,17 @@ int		cam_periph_ioctl(struct cam_periph *periph, int cmd,
 				 int (*error_routine)(union ccb *ccb,
 						      cam_flags camflags,
 						      u_int32_t sense_flags));
+void		cam_freeze_devq(struct cam_path *path);
 u_int32_t	cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
 				 u_int32_t opening_reduction, u_int32_t timeout,
 				 int getcount_only);
+void		cam_periph_async(struct cam_periph *periph, u_int32_t code,
+		 		 struct cam_path *path, void *arg);
+void		cam_periph_bus_settle(struct cam_periph *periph,
+				      u_int bus_settle_ms);
+void		cam_periph_freeze_after_event(struct cam_periph *periph,
+					      struct timeval* event_time,
+					      u_int duration_ms);
 int		cam_periph_error(union ccb *ccb, cam_flags camflags,
 				 u_int32_t sense_flags, union ccb *save_ccb);