Sigh, nobody ever got back to me about this. So, here it is..

Implement auto scsi scan at insert time for the aic driver.

1 files changed, 35 insertions, 8 deletions

diff --git a/sys/dev/aic/aic.c b/sys/dev/aic/aic.c
index 2123766..634373e 100644
--- a/sys/dev/aic/aic.c
+++ b/sys/dev/aic/aic.c
@@ -30,6 +30,8 @@
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/bus.h>
+#include <sys/malloc.h>
+#include <sys/devicestat.h>	/* for struct devstat */
 
 #include <machine/bus_pio.h>
 #include <machine/bus.h>
@@ -39,6 +41,7 @@
 #include <cam/cam_sim.h>
 #include <cam/cam_xpt_sim.h>
 #include <cam/cam_debug.h>
+#include <cam/cam_periph.h>
 
 #include <cam/scsi/scsi_message.h>
 
@@ -65,6 +68,9 @@ static void aic_timeout __P((void *arg));
 static void aic_scsi_reset __P((struct aic_softc *aic));
 static void aic_chip_reset __P((struct aic_softc *aic));
 static void aic_reset __P((struct aic_softc *aic, int initiate_reset));
+static void aic_cam_rescan_callback __P((struct cam_periph *periph,
+					union ccb *ccb));
+static void aic_cam_rescan __P((struct aic_softc *aic));
 
 devclass_t aic_devclass;
 
@@ -1497,14 +1503,6 @@ aic_attach(struct aic_softc *aic)
 		return (ENXIO);
 	}
 
-	if (xpt_create_path(&aic->path, /*periph*/NULL,
-			    cam_sim_path(aic->sim), CAM_TARGET_WILDCARD,
-			    CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
-		xpt_bus_deregister(cam_sim_path(aic->sim));
-		cam_sim_free(aic->sim, /*free_devq*/TRUE);
-		return (ENXIO);
-	}
-
 	aic_init(aic);
 
 	printf("aic%d: %s", aic->unit,
@@ -1516,6 +1514,9 @@ aic_attach(struct aic_softc *aic)
 	if (aic->flags & AIC_PARITY_ENABLE)
 		printf(", parity check");
 	printf("\n");
+
+	aic_cam_rescan(aic);	/* have CAM rescan the bus */
+
 	return (0);
 }
 
@@ -1528,3 +1529,29 @@ aic_detach(struct aic_softc *aic)
 	cam_sim_free(aic->sim, /*free_devq*/TRUE);
 	return (0);
 }
+
+static void
+aic_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
+{
+	free(ccb, M_TEMP);
+}
+
+static void
+aic_cam_rescan(struct aic_softc *aic)
+{
+	union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO);
+
+	if (xpt_create_path(&aic->path, xpt_periph, cam_sim_path(aic->sim), 0, 0)
+	    != CAM_REQ_CMP) {
+		/* A failure is benign as the user can do a manual rescan */
+		return;
+	}
+
+	xpt_setup_ccb(&ccb->ccb_h, aic->path, 5/*priority (low)*/);
+	ccb->ccb_h.func_code = XPT_SCAN_BUS;
+	ccb->ccb_h.cbfcnp = aic_cam_rescan_callback;
+	ccb->crcn.flags = CAM_FLAG_NONE;
+	xpt_action(ccb);
+
+	/* The scan is in progress now. */
+}