autotest: blacklist OCSSD devices

Detect and blacklist OCSSD devices by unbinding the driver.

Change-Id: I7ba6cefd083a7d3ead6db27fa27a765f8ee52402
Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-on: https://review.gerrithub.io/c/442978
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

autotest.sh

@@ -63,8 +63,41 @@ rm -f /var/tmp/spdk*.sock
 # Let the kernel discover any filesystems or partitions
 sleep 10
 
+if [ $(uname -s) = Linux ]; then
+	# OCSSD devices drivers don't support IO issues by kernel so
+	# detect OCSSD devices and blacklist them (unbind from any driver).
+	# If test scripts want to use this device it needs to do this explicitly.
+	#
+	# If some OCSSD device is bound to other driver than nvme we won't be able to
+	# discover if it is OCSSD or not so load the kernel driver first.
+
+
+	for dev in $(find /dev -maxdepth 1 -regex '/dev/nvme[0-9]+'); do
+		# Send Open Channel 2.0 Geometry opcode "0xe2" - not supported by NVMe device.
+		if nvme admin-passthru $dev --namespace-id=1 --data-len=4096  --opcode=0xe2 --read >/dev/null; then
+			bdf="$(basename $(readlink -e /sys/class/nvme/${dev#/dev/}/device))"
+			echo "INFO: blacklisting OCSSD device: $dev ($bdf)"
+			PCI_BLACKLIST+=" $bdf"
+		fi
+	done
+
+	# Now, bind blacklisted devices to pci-stub module. This will prevent
+	# automatic grabbing these devices when we add device/vendor ID to
+	# proper driver.
+	if [[ -n "$PCI_BLACKLIST" ]]; then
+		PCI_WHITELIST="$PCI_BLACKLIST" \
+		PCI_BLACKLIST="" \
+		DRIVER_OVERRIDE="pci-stub" \
+			./scripts/setup.sh
+
+		# Export our blacklist so it will take effect during next setup.sh
+		export PCI_BLACKLIST
+	fi
+fi
+
 # Delete all leftover lvols and gpt partitions
 # Matches both /dev/nvmeXnY on Linux and /dev/nvmeXnsY on BSD
+# Filter out nvme with partitions - the "p*" suffix
 for dev in $(ls /dev/nvme*n* | grep -v p || true); do
 	dd if=/dev/zero of="$dev" bs=1M count=1
 done