Since magit 2.1: magit-log-buffer-file (as per comment below)
Before magit 2.1: magit-file-log is what you are looking for. It will show you all commits for the file in the current buffer in the standard magit log view.
Since magit 2.1: magit-log-buffer-file (as per comment below)
Before magit 2.1: magit-file-log is what you are looking for. It will show you all commits for the file in the current buffer in the standard magit log view.