- Overhaul the software interrupt code to use interrupt threads for each

  type of software interrupt.  Roughly, what used to be a bit in spending
  now maps to a swi thread.  Each thread can have multiple handlers, just
  like a hardware interrupt thread.
- Instead of using a bitmask of pending interrupts, we schedule the specific
  software interrupt thread to run, so spending, NSWI, and the shandlers
  array are no longer needed.  We can now have an arbitrary number of
  software interrupt threads.  When you register a software interrupt
  thread via sinthand_add(), you get back a struct intrhand that you pass
  to sched_swi() when you wish to schedule your swi thread to run.
- Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit
  more intuitive.  Also, prefix all the members of struct intrhand with
  'ih_'.
- Make swi_net() a MI function since there is now no point in it being
  MD.

Submitted by:	cp

1 files changed, 17 insertions, 29 deletions

diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
index b498d61..4dd19c4 100644
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -605,6 +605,10 @@ u_int32_t cam_dflags;
 u_int32_t cam_debug_delay;
 #endif
 
+/* Pointers to software interrupt handlers */
+struct intrhand *camnet_ih;
+struct intrhand *cambio_ih;
+
 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 #endif
@@ -693,9 +697,7 @@ static xpt_devicefunc_t xptpassannouncefunc;
 static void	 xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 static void	 xptaction(struct cam_sim *sim, union ccb *work_ccb);
 static void	 xptpoll(struct cam_sim *sim);
-static swihand_t swi_camnet;
-static swihand_t swi_cambio;
-static void	 camisr(cam_isrq_t *queue);
+static void	 camisr(void *);
 #if 0
 static void	 xptstart(struct cam_periph *periph, union ccb *work_ccb);
 static void	 xptasync(struct cam_periph *periph,
@@ -1363,8 +1365,10 @@ xpt_init(dummy)
 	}
 
 	/* Install our software interrupt handlers */
-	register_swi(SWI_CAMNET, swi_camnet);
-	register_swi(SWI_CAMBIO, swi_cambio);
+	camnet_ih = sinthand_add("camnet", NULL, camisr, &cam_netq,
+		SWI_CAMNET, 0);
+	cambio_ih = sinthand_add("cambio", NULL, camisr, &cam_bioq,
+		SWI_CAMBIO, 0);
 }
 
 static cam_status
@@ -3400,8 +3404,8 @@ xpt_polled_action(union ccb *start_ccb)
 	   && (--timeout > 0)) {
 		DELAY(1000);
 		(*(sim->sim_poll))(sim);
-		swi_camnet();
-		swi_cambio();		
+		camisr(&cam_netq);
+		camisr(&cam_bioq);
 	}
 	
 	dev->ccbq.devq_openings++;
@@ -3411,8 +3415,8 @@ xpt_polled_action(union ccb *start_ccb)
 		xpt_action(start_ccb);
 		while(--timeout > 0) {
 			(*(sim->sim_poll))(sim);
-			swi_camnet();
-			swi_cambio();
+			camisr(&cam_netq);
+			camisr(&cam_bioq);
 			if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
 			    != CAM_REQ_INPROG)
 				break;
@@ -4527,13 +4531,13 @@ xpt_done(union ccb *done_ccb)
 			TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
 					  sim_links.tqe);
 			done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
-			setsoftcambio();
+			sched_swi(cambio_ih, SWI_NOSWITCH);
 			break;
 		case CAM_PERIPH_NET:
 			TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h,
 					  sim_links.tqe);
 			done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
-			setsoftcamnet();
+			sched_swi(camnet_ih, SWI_NOSWITCH);
 			break;
 		}
 	}
@@ -6240,26 +6244,10 @@ xptpoll(struct cam_sim *sim)
 {
 }
 
-/*
- * Should only be called by the machine interrupt dispatch routines,
- * so put these prototypes here instead of in the header.
- */
-
-static void
-swi_camnet(void)
-{
-	camisr(&cam_netq);
-}
-
-static void
-swi_cambio(void)
-{
-	camisr(&cam_bioq);
-}
-
 static void
-camisr(cam_isrq_t *queue)
+camisr(void *V_queue)
 {
+	cam_isrq_t *queue = V_queue;
 	int	s;
 	struct	ccb_hdr *ccb_h;