[rhel9] add support for nvlink5+ systems

Signed-off-by: Tariq Ibrahim <[email protected]>

Author: tariq1890

rhel9/nvidia-driver

@@ -268,6 +268,37 @@ _assert_nvswitch_system() {
     return 0
 }
 
+_assert_nvlink5_system() (
+    for dir in /sys/class/infiniband/*/device; do
+        # Define the path to the VPD file
+        vpd_file="$dir/vpd"
+
+        # Check if the VPD file exists
+        if [ -f "$vpd_file" ]; then
+            # Search for 'SW_MNG' in the VPD file
+            if grep -q "SW_MNG" "$vpd_file"; then
+                echo "Detected NVLink5+ system"
+                return 0
+            fi
+        fi
+    done
+    return 1
+)
+
+_ensure_nvlink5_prerequisites() (
+    until  lsmod | grep mlx5_core > /dev/null 2>&1 && lsmod | grep ib_umad > /dev/null 2>&1;
+    do
+        echo "waiting for the mlx5_core and ib_umad kernel modules to be loaded"
+        sleep 10
+    done
+
+    echo "Installing Infiniband packages..."
+    dnf -q -y --releasever=${DNF_RELEASEVER} install libibverbs-utils infiniband-diags > /dev/null
+
+    echo "Installing the NVLink subnet manager..."
+    dnf -q -y --releasever=${DNF_RELEASEVER} install nvlsm > /dev/null
+)
+
 # For each kernel module configuration file mounted into the container,
 # parse the file contents and extract the custom module parameters that
 # are to be passed as input to 'modprobe'.
@@ -370,7 +401,18 @@ _load_driver() {
         _start_vgpu_topology_daemon
     fi
 
-    if _assert_nvswitch_system; then
+    if _assert_nvlink5_system; then
+        _ensure_nvlink5_prerequisites || return 1
+        echo "Starting NVIDIA fabric manager daemon for NVLink5+..."
+
+        fm_config_file=/usr/share/nvidia/nvswitch/fabricmanager.cfg
+        fm_pid_file=/var/run/nvidia-fabricmanager/nv-fabricmanager.pid
+        nvlsm_config_file=/usr/share/nvidia/nvlsm/nvlsm.conf
+        nvlsm_pid_file=/var/run/nvidia-fabricmanager/nvlsm.pid
+        /usr/bin/nvidia-fabricmanager-start.sh $fm_config_file $fm_pid_file $nvlsm_config_file $nvlsm_pid_file
+
+    # If not a NVLink5+ switch, check for the presence of NVLink4 (or below) switches
+    elif _assert_nvswitch_system; then
         echo "Starting NVIDIA fabric manager daemon..."
         nv-fabricmanager -c /usr/share/nvidia/nvswitch/fabricmanager.cfg
     fi
@@ -430,6 +472,21 @@ _unload_driver() {
         fi
     fi
 
+    if [ -f /var/run/nvidia-fabricmanager/nvlsm.pid ]; then
+        echo "Stopping NVLink Subnet Manager daemon..."
+        local pid=$(< /var/run/nvidia-fabricmanager/nvlsm.pid)
+
+        kill -SIGTERM "${pid}"
+        for i in $(seq 1 50); do
+            kill -0 "${pid}" 2> /dev/null || break
+            sleep 0.1
+        done
+        if [ $i -eq 50 ]; then
+            echo "Could not stop NVLink Subnet Manager daemon" >&2
+            return 1
+        fi
+    fi
+
     echo "Unloading NVIDIA driver kernel modules..."
     if [ -f /sys/module/nvidia_modeset/refcnt ]; then
         nvidia_modeset_refs=$(< /sys/module/nvidia_modeset/refcnt)