Update the CAM API for FreeBSD 10:

- Remove the timeout_ch field.  It's been deprecated since FreeBSD 7.0;
  MPSAFE drivers should be managing their own timeout storage.  The
  remaining non-MPSAFE drivers have been modified to also manage their own
  storage, and should be considered for updating to MPSAFE (or removal)
  during the FreeBSD 10.x lifecycle.

- Add fields related to soft timeouts and quality of service, to be used
  in upcoming work.

- Add room for more flags in the CCB header and path_inq structures.

- Begin support for extended 64-bit LUNs.

- Bump the CAM version number to 0x18, but add compat shims.  Tested with
  camcontrol and smartctl.

Reviewed by:    nathanw, ken, kib
Approved by:    re
Obtained from:  Netflix

1 files changed, 24 insertions, 9 deletions

diff --git a/sys/dev/asr/asr.c b/sys/dev/asr/asr.c
index 8909d0c..1e4f1a6 100644
--- a/sys/dev/asr/asr.c
+++ b/sys/dev/asr/asr.c
@@ -385,6 +385,21 @@ typedef struct Asr_softc {
 static STAILQ_HEAD(, Asr_softc) Asr_softc_list =
 	STAILQ_HEAD_INITIALIZER(Asr_softc_list);
 
+static __inline void
+set_ccb_timeout_ch(union asr_ccb *ccb, struct callout_handle ch)
+{
+	ccb->ccb_h.sim_priv.entries[0].ptr = ch.callout;
+}
+
+static __inline struct callout_handle
+get_ccb_timeout_ch(union asr_ccb *ccb)
+{
+	struct callout_handle ch;
+
+	ch.callout = ccb->ccb_h.sim_priv.entries[0].ptr;
+	return ch;
+}
+
 /*
  *	Prototypes of the routines we have in this object.
  */
@@ -797,8 +812,8 @@ ASR_ccbAdd(Asr_softc_t *sc, union asr_ccb *ccb)
 			 */
 			ccb->ccb_h.timeout = 6 * 60 * 1000;
 		}
-		ccb->ccb_h.timeout_ch = timeout(asr_timeout, (caddr_t)ccb,
-		  (ccb->ccb_h.timeout * hz) / 1000);
+		set_ccb_timeout_ch(ccb, timeout(asr_timeout, (caddr_t)ccb,
+		  (ccb->ccb_h.timeout * hz) / 1000));
 	}
 	splx(s);
 } /* ASR_ccbAdd */
@@ -812,7 +827,7 @@ ASR_ccbRemove(Asr_softc_t *sc, union asr_ccb *ccb)
 	int s;
 
 	s = splcam();
-	untimeout(asr_timeout, (caddr_t)ccb, ccb->ccb_h.timeout_ch);
+	untimeout(asr_timeout, (caddr_t)ccb, get_ccb_timeout_ch(ccb));
 	LIST_REMOVE(&(ccb->ccb_h), sim_links.le);
 	splx(s);
 } /* ASR_ccbRemove */
@@ -1322,9 +1337,9 @@ asr_timeout(void *arg)
 		  cam_sim_unit(xpt_path_sim(ccb->ccb_h.path)), s);
 		if (ASR_reset (sc) == ENXIO) {
 			/* Try again later */
-			ccb->ccb_h.timeout_ch = timeout(asr_timeout,
+			set_ccb_timeout_ch(ccb, timeout(asr_timeout,
 			  (caddr_t)ccb,
-			  (ccb->ccb_h.timeout * hz) / 1000);
+			  (ccb->ccb_h.timeout * hz) / 1000));
 		}
 		return;
 	}
@@ -1338,9 +1353,9 @@ asr_timeout(void *arg)
 	if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_CMD_TIMEOUT) {
 		debug_asr_printf (" AGAIN\nreinitializing adapter\n");
 		if (ASR_reset (sc) == ENXIO) {
-			ccb->ccb_h.timeout_ch = timeout(asr_timeout,
+			set_ccb_timeout_ch(ccb, timeout(asr_timeout,
 			  (caddr_t)ccb,
-			  (ccb->ccb_h.timeout * hz) / 1000);
+			  (ccb->ccb_h.timeout * hz) / 1000));
 		}
 		splx(s);
 		return;
@@ -1349,8 +1364,8 @@ asr_timeout(void *arg)
 	/* If the BUS reset does not take, then an adapter reset is next! */
 	ccb->ccb_h.status &= ~CAM_STATUS_MASK;
 	ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
-	ccb->ccb_h.timeout_ch = timeout(asr_timeout, (caddr_t)ccb,
-	  (ccb->ccb_h.timeout * hz) / 1000);
+	set_ccb_timeout_ch(ccb, timeout(asr_timeout, (caddr_t)ccb,
+	  (ccb->ccb_h.timeout * hz) / 1000));
 	ASR_resetBus (sc, cam_sim_bus(xpt_path_sim(ccb->ccb_h.path)));
 	xpt_async (AC_BUS_RESET, ccb->ccb_h.path, NULL);
 	splx(s);