MFC mpr(4) changes: r265484, r265485, r265709 and r265712

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  r265484 | ken | 2014-05-06 23:11:16 -0600 (Tue, 06 May 2014) | 5 lines

  Remove some debugging code.

  Submitted by:	Steve McConnell <stephen.mcconnell@avagotech.com>

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  r265485 | ken | 2014-05-06 23:14:48 -0600 (Tue, 06 May 2014) | 9 lines

  Hold the SIM lock when calling xpt_create_path() and xpt_action() in
  mprsas_SSU_to_SATA_devices().

  This fixes an assertion on shutdown with INVARIANTS enabled with SATA
  drives present on an IR firmware controller.

  Reviewed by:	Steve McConnell <stephen.mcconnell@avagotech.com>.

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  r265709 | ken | 2014-05-08 14:28:22 -0600 (Thu, 08 May 2014) | 15 lines

  Fix TLR (Transport Layer Retry) support in the mps(4) and mpr(4) drivers.

  TLR is necessary for reliable communication with SAS tape drives.

  This was broken by change 246713 in the mps(4) driver.  It changed the
  cm_data field for SCSI I/O requests to point to the CCB instead of the data
  buffer.  So, instead, look at the CCB's data pointer to determine whether
  or not we're talking to a tape drive.

  Also, take the residual into account to make sure that we don't go off the
  end of the request.

  Sponsored by:	Spectra Logic Corporation

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  r265712 | ken | 2014-05-08 14:46:46 -0600 (Thu, 08 May 2014) | 10 lines

  Add #ifdefs in the mpr(4) driver so that versions of stable/9 that
  have implemented the PIM_NOSCAN rescan functionality will have it
  enabled.

  This is a no-op for head.

  Reviewed by:	slm
  Sponsored by:	Spectra Logic Corporation

  ------------------------------------------------------------------------

Sponsored by:	Spectra Logic, Avago

3 files changed, 20 insertions, 9 deletions

diff --git a/sys/dev/mpr/mpr.c b/sys/dev/mpr/mpr.c
index fe187a5..3656eec 100644
--- a/sys/dev/mpr/mpr.c
+++ b/sys/dev/mpr/mpr.c
@@ -2182,8 +2182,6 @@ mpr_add_chain(struct mpr_command *cm, int segsleft)
 	 * code other than 0.
 	 */
 	if (cm->cm_flags & MPR_CM_FLAGS_SGE_SIMPLE) {
-//SLM-test
-printf("Trying to add a chain element to an MPI SGL\n");
 		mpr_dprint(sc, MPR_ERROR, "A chain element cannot be added to "
 		    "an MPI SGL.\n");
 		return(ENOBUFS);
diff --git a/sys/dev/mpr/mpr_sas.c b/sys/dev/mpr/mpr_sas.c
index 1a51109..1f95358 100644
--- a/sys/dev/mpr/mpr_sas.c
+++ b/sys/dev/mpr/mpr_sas.c
@@ -183,7 +183,8 @@ mprsas_startup_increment(struct mprsas_softc *sassc)
 			/* just starting, freeze the simq */
 			mpr_dprint(sassc->sc, MPR_INIT,
 			    "%s freezing simq\n", __func__);
-#if __FreeBSD_version >= 1000039
+#if (__FreeBSD_version >= 1000039) || \
+    ((__FreeBSD_version < 1000000) && (__FreeBSD_version >= 902502))
 			xpt_hold_boot();
 #endif
 			xpt_freeze_simq(sassc->sim, 1);
@@ -217,7 +218,8 @@ mprsas_startup_decrement(struct mprsas_softc *sassc)
 			    "%s releasing simq\n", __func__);
 			sassc->flags &= ~MPRSAS_IN_STARTUP;
 			xpt_release_simq(sassc->sim, 1);
-#if __FreeBSD_version >= 1000039
+#if (__FreeBSD_version >= 1000039) || \
+    ((__FreeBSD_version < 1000000) && (__FreeBSD_version >= 902502))
 			xpt_release_boot();
 #else
 			mprsas_rescan_target(sassc->sc, NULL);
@@ -974,7 +976,8 @@ mprsas_action(struct cam_sim *sim, union ccb *ccb)
 		cpi->version_num = 1;
 		cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 		cpi->target_sprt = 0;
-#if __FreeBSD_version >= 1000039
+#if (__FreeBSD_version >= 1000039) || \
+    ((__FreeBSD_version < 1000000) && (__FreeBSD_version >= 902502))
 		cpi->hba_misc = PIM_NOBUSRESET | PIM_UNMAPPED | PIM_NOSCAN;
 #else
 		cpi->hba_misc = PIM_NOBUSRESET | PIM_UNMAPPED;
@@ -2355,8 +2358,9 @@ mprsas_scsiio_complete(struct mpr_softc *sc, struct mpr_command *cm)
 		    (csio->cdb_io.cdb_bytes[1] & SI_EVPD) &&
 		    (csio->cdb_io.cdb_bytes[2] == SVPD_SUPPORTED_PAGE_LIST) &&
 		    ((csio->ccb_h.flags & CAM_DATA_MASK) == CAM_DATA_VADDR) &&
-		    (csio->data_ptr != NULL) && (((uint8_t *)cm->cm_data)[0] ==
-		    T_SEQUENTIAL) && (sc->control_TLR) &&
+		    (csio->data_ptr != NULL) &&
+		    ((csio->data_ptr[0] & 0x1f) == T_SEQUENTIAL) &&
+		    (sc->control_TLR) &&
 		    (sc->mapping_table[csio->ccb_h.target_id].device_info &
 		    MPI2_SAS_DEVICE_INFO_SSP_TARGET)) {
 			vpd_list = (struct scsi_vpd_supported_page_list *)
@@ -2367,6 +2371,7 @@ mprsas_scsiio_complete(struct mpr_softc *sc, struct mpr_command *cm)
 			TLR_on = (u8)MPI2_SCSIIO_CONTROL_TLR_ON;
 			alloc_len = ((u16)csio->cdb_io.cdb_bytes[3] << 8) +
 			    csio->cdb_io.cdb_bytes[4];
+			alloc_len -= csio->resid;
 			for (i = 0; i < MIN(vpd_list->length, alloc_len); i++) {
 				if (vpd_list->list[i] == 0x90) {
 					*TLR_bits = TLR_on;
diff --git a/sys/dev/mpr/mpr_sas_lsi.c b/sys/dev/mpr/mpr_sas_lsi.c
index cf5be2b..32e9b3a 100644
--- a/sys/dev/mpr/mpr_sas_lsi.c
+++ b/sys/dev/mpr/mpr_sas_lsi.c
@@ -801,7 +801,8 @@ mprsas_add_device(struct mpr_softc *sc, u16 handle, u8 linkrate){
 		    "and connector name (%4s)\n", targ->encl_level,
 		    targ->connector_name);
 	}
-#if __FreeBSD_version < 1000039
+#if ((__FreeBSD_version >= 1000000) && (__FreeBSD_version < 1000039)) || \
+    (__FreeBSD_version < 902502)
 	if ((sassc->flags & MPRSAS_IN_STARTUP) == 0)
 #endif
 		mprsas_rescan_target(sc, targ);
@@ -992,7 +993,8 @@ mprsas_volume_add(struct mpr_softc *sc, u16 handle)
 		free(lun, M_MPR);
 	}
 	SLIST_INIT(&targ->luns);
-#if __FreeBSD_version < 1000039
+#if ((__FreeBSD_version >= 1000000) && (__FreeBSD_version < 1000039)) || \
+    (__FreeBSD_version < 902502)
 	if ((sassc->flags & MPRSAS_IN_STARTUP) == 0)
 #endif
 		mprsas_rescan_target(sc, targ);
@@ -1026,6 +1028,8 @@ mprsas_SSU_to_SATA_devices(struct mpr_softc *sc)
 	char path_str[64];
 	struct timeval cur_time, start_time;
 
+	mpr_lock(sc);
+
 	/*
 	 * For each LUN of each target, issue a StartStopUnit command to stop
 	 * the device.
@@ -1041,6 +1045,7 @@ mprsas_SSU_to_SATA_devices(struct mpr_softc *sc)
 		SLIST_FOREACH(lun, &target->luns, lun_link) {
 			ccb = xpt_alloc_ccb_nowait();
 			if (ccb == NULL) {
+				mpr_unlock(sc);
 				mpr_dprint(sc, MPR_FAULT, "Unable to alloc "
 				    "CCB to stop unit.\n");
 				return;
@@ -1057,6 +1062,7 @@ mprsas_SSU_to_SATA_devices(struct mpr_softc *sc)
 					mpr_dprint(sc, MPR_FAULT, "Unable to "
 					    "create LUN path to stop unit.\n");
 					xpt_free_ccb(ccb);
+					mpr_unlock(sc);
 					return;
 				}
 				xpt_path_string(ccb->ccb_h.path, path_str,
@@ -1092,6 +1098,8 @@ mprsas_SSU_to_SATA_devices(struct mpr_softc *sc)
 		}
 	}
 
+	mpr_unlock(sc);
+
 	/*
 	 * Wait until all of the SSU commands have completed or time has
 	 * expired (60 seconds).  pause for 100ms each time through.  If any