[SWDEV-499029] Fix unable to change memory partition modes

Changes:
  * [API] Removed checking board name, fixes for other MI ASICs
  * [API] Fixed unable to restart AMD GPU, libdrm blocked
    doing this operation
  * [API] Added ability to unload/reload libdrm
    from within AMD SMI APIs
  * [CLI] Increased progress bar to change memory partition modes
    to 140 seconds, since driver reload is variable per system

Change-Id: I52f227f2ab850c4a6332ff3ecdc899903b1080f1
Signed-off-by: Charis Poag <Charis.Poag@amd.com>

src/amd_smi/amd_smi_lib_loader.cc

@@ -33,18 +33,24 @@ amdsmi_status_t AMDSmiLibraryLoader::load(const char* filename) {
     if (filename == nullptr) {
         return AMDSMI_STATUS_FAIL_LOAD_MODULE;
     }
-    if (libHandler_) {
+    if (libHandler_ || library_loaded_) {
         unload();
     }
 
     std::lock_guard<std::mutex> guard(library_mutex_);
-    libHandler_ = dlopen(filename, RTLD_LAZY);
-    if (!libHandler_) {
-        char* error = dlerror();
-        std::cerr << "Fail to open " << filename <<": " << error
-                << std::endl;
-        return AMDSMI_STATUS_FAIL_LOAD_MODULE;
+    // check if already loaded, return success if it is
+    // dlopen(filename, RTLD_NOLOAD) == null only IFF library is not loaded
+    void* isLibOpen = dlopen(filename, RTLD_NOLOAD);
+    if (isLibOpen == nullptr) {
+      libHandler_ = dlopen(filename, RTLD_LAZY);
+      if (!libHandler_) {
+          char* error = dlerror();
+          std::cerr << "Fail to open " << filename <<": " << error
+                  << std::endl;
+          return AMDSMI_STATUS_FAIL_LOAD_MODULE;
+      }
     }
+    library_loaded_ = true;
 
     return AMDSMI_STATUS_SUCCESS;
 }
@@ -54,6 +60,7 @@ amdsmi_status_t AMDSmiLibraryLoader::unload() {
         if (libHandler_) {
             dlclose(libHandler_);
             libHandler_ = nullptr;
+            library_loaded_ = false;
         }
         return AMDSMI_STATUS_SUCCESS;
 }