This information is contained in several files in /proc/driver/nvidia. When using multiple NVIDIA kernel modules, the files will be split up in separate directories /proc/driver/nvidia/[0-7], with one directory per NVIDIA kernel module.

/proc/driver/nvidia/version

Lists the installed driver revision and the version of the GNU C compiler used to build the Linux kernel module.

/proc/driver/nvidia/warnings

The NVIDIA graphics driver tries to detect potential problems with the host system's kernel and warns about them using the kernel's printk() mechanism, typically logged by the system to /var/log/messages.

Important NVIDIA warning messages are also logged to dedicated text files in this /proc directory.

/proc/driver/nvidia/gpus/domain:bus:device.function/information

Provide information about each of the installed NVIDIA graphics adapters (model name, IRQ, BIOS version, Bus Type). Note that the BIOS version is only available while X is running.