feat: disconnect Bluetooth devices, flush disks on shutdown/reboot, display progress in login.elf window

kernel/src/Drivers/Storage/Nvme.cpp

@@ -665,6 +665,9 @@ namespace Drivers::Storage::Nvme {
             bdev.WriteSectors = [](void* ctx, uint64_t lba, uint32_t count, const void* buffer) -> bool {
                 return WriteSectors((int)(uintptr_t)ctx, lba, count, buffer);
             };
+            bdev.Flush = [](void* ctx) -> bool {
+                return Flush((int)(uintptr_t)ctx);
+            };
             bdev.Ctx = (void*)(uintptr_t)i;
             bdev.SectorCount = g_namespaces[i].SectorCount;
             bdev.SectorSize = (uint16_t)g_namespaces[i].SectorSize;
@@ -770,6 +773,22 @@ namespace Drivers::Storage::Nvme {
         return ok;
     }
 
+    bool Flush(int ns) {
+        if (!g_initialized || ns < 0 || ns >= g_nsCount || !g_namespaces[ns].Active) {
+            return false;
+        }
+
+        // NVM Flush: commits the namespace's volatile write cache to media.
+        SqEntry cmd = {};
+        cmd.Opcode = IO_CMD_FLUSH;
+        cmd.Nsid = g_namespaces[ns].Nsid;
+
+        SubmitIoCommand(cmd);
+
+        CqEntry cqe;
+        return WaitIoCompletion(cqe);
+    }
+
     bool WriteSectors(int ns, uint64_t lba, uint32_t count, const void* buffer) {
         if (!g_initialized || ns < 0 || ns >= g_nsCount || !g_namespaces[ns].Active) {
             return false;