NV services
The Switch makes use of a customized NVIDIA driver that is exposed through multiple services. Communication with these services goes through IPC, as usual.
nvdrv:a
| Cmd | Name |
|---|---|
| 0 | Open |
| 1 | Ioctl |
| 2 | Close |
| 3 | Initialize |
| 4 | QueryEvent |
| 5 | MapSharedMem |
| 6 | |
| 7 | |
| 8 | Audio render related init? |
| 9 | ? |
Ioctls
The ioctl number is generated with the following primitive (see Linux kernel):
#define _IOC(inout, group, num, len) \ (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
The following table contains known ioctls.
| Device | Value | Description | Notes |
|---|---|---|---|
| /dev/nvhost-* | 0xC0??0001 | NVHOST32_IOCTL_CHANNEL_SUBMIT | ?? == size is unknown |
| /dev/nvhost-* | 0xC0080002 | NVHOST_IOCTL_CHANNEL_GET_SYNCPOINT | |
| /dev/nvhost-* | 0xC0080003 | NVHOST_IOCTL_CHANNEL_GET_WAITBASE | |
| /dev/nvhost-* | 0xC0080004 | NVHOST_IOCTL_CHANNEL_SET_TIMEOUT_EX | |
| /dev/nvhost-* | 0xC01C0009 | NVHOST_IOCTL_CHANNEL_SUBMIT(?) | |
| /dev/nvhost-* | 0xC01C000A | NVHOST_IOCTL_CHANNEL_MODULE_REGRDWR(?) | |
| /dev/nvhost-* | 0xC0080014 | NVHOST_IOCTL_CTRL_SYNCPT_READ | |
| /dev/nvhost-* | 0x40040015 | NVHOST_IOCTL_CTRL_SYNCPT_INCR | |
| /dev/nvhost-* | 0xC00C0016 | NVHOST_IOCTL_CTRL_SYNCPT_WAIT | |
| /dev/nvhost-* | 0x40080017 | NVHOST_IOCTL_CTRL_MODULE_MUTEX | |
| /dev/nvhost-* | 0xC0180018 | NVHOST32_IOCTL_CTRL_MODULE_REGRDWR | |
| /dev/nvhost-* | 0xC0100019 | NVHOST_IOCTL_CTRL_SYNCPT_WAITEX | |
| /dev/nvhost-* | 0xC008001A | NVHOST_IOCTL_CTRL_SYNCPT_READ_MAX | |
| /dev/nvhost-* | 0xC004001C | NVHOST_IOCTL_CTRL_GET_VERSION(?) | |
| /dev/nvhost-* | 0xC010001D | NvRmSyncWaitEvent (wait on event?) | |
| /dev/nvhost-* | 0xC010001E | NvRmSyncWaitEvent (wait on event?) | |
| /dev/nvhost-* | 0xC004001F | NvRmSyncWaitEvent (signal event?) | |
| /dev/nvhost-* | 0xC0040020 | NvRmSyncWaitEvent (signal event?) | |
| /dev/nvhost-* | 0x40080021 | Returns busy? | |
| /dev/nvmap | 0xC0080101 | NVMAP_IOC_CREATE | |
| /dev/nvmap | 0xC0080103 | NVMAP_IOC_FROM_ID | |
| /dev/nvmap | 0xC0200104 | NVMAP_IOC_ALLOC | |
| /dev/nvmap | 0xC0180105 | NVMAP_IOC_FREE | |
| /dev/nvmap | 0xC00C0109 | NVMAP_IOC_PARAM | |
| /dev/nvmap | 0xC008010E | NVMAP_IOC_GET_ID | |
| /dev/nvhost-as-gpu | 0x40044101 | NVGPU_AS_IOCTL_BIND_CHANNEL | |
| /dev/nvhost-as-gpu | 0xC0184102 | NVGPU32_AS_IOCTL_ALLOC_SPACE | |
| /dev/nvhost-as-gpu | 0xC0104103 | NVGPU_AS_IOCTL_FREE_SPACE | |
| /dev/nvhost-as-gpu | 0xC0184104 | NVGPU_AS_IOCTL_MAP_BUFFER | |
| /dev/nvhost-as-gpu | 0xC0084105 | NVGPU_AS_IOCTL_UNMAP_BUFFER | |
| /dev/nvhost-as-gpu | 0xC0284106 | NVGPU_AS_IOCTL_ALLOC_SPACE | |
| /dev/nvhost-as-gpu | 0x40104107 | ||
| /dev/nvhost-as-gpu | 0xC0404108 | ||
| /dev/nvhost-as-gpu | 0x40284109 | ||
| /dev/nvhost-as-gpu | 0xC0144114 | ||
| /dev/nvhost-dbg-gpu | 0xC0??4402 | NVGPU_DBG_GPU_IOCTL_REG_OPS | ?? == size is unknown |
| /dev/nvhost-ctrl-gpu | 0x80044701 | NVGPU_GPU_IOCTL_ZCULL_GET_CTX_SIZE | |
| /dev/nvhost-ctrl-gpu | 0x80284702 | NVGPU_GPU_IOCTL_ZCULL_GET_INFO | |
| /dev/nvhost-ctrl-gpu | 0x402C4703 | NVGPU_GPU_IOCTL_ZBC_SET_TABLE | |
| /dev/nvhost-ctrl-gpu | 0xC0344704 | NVGPU_GPU_IOCTL_ZBC_QUERY_TABLE | |
| /dev/nvhost-ctrl-gpu | 0xC0B04705 | NVGPU_GPU_IOCTL_GET_CHARACTERISTICS | |
| /dev/nvhost-ctrl-gpu | 0xC0184706 | NVGPU_AS_IOCTL_ALLOC_SPACE | |
| /dev/nvhost-ctrl-gpu | 0x40084707 | ||
| /dev/nvhost-ctrl-gpu | 0x4008470E | ||
| /dev/nvhost-ctrl-gpu | 0x4010470F | ||
| /dev/nvhost-ctrl-gpu | 0xC0084710 | ||
| /dev/nvhost-ctrl-gpu | 0x80084711 | ||
| /dev/nvhost-ctrl-gpu | 0x80084714 | ||
| /dev/nvhost-ctrl-gpu | 0xC008471B | ||
| /dev/nvhost-ctrl-gpu | 0xC010471C | ||
| /dev/nvhost-* | 0x40044801 | NVGPU_IOCTL_CHANNEL_SET_NVMAP_FD | |
| /dev/nvhost-* | 0x40044803 | NVGPU_IOCTL_CHANNEL_SET_TIMEOUT(?) | |
| /dev/nvhost-* | 0x40084805 | NVGPU_IOCTL_CHANNEL_SET_TIMEOUT_EX(?) | |
| /dev/nvhost-* | 0xC0044807 | NVGPU_IOCTL_CHANNEL_CYCLE_STATS | |
| /dev/nvhost-* | 0xC0184808 | NVGPU_IOCTL_CHANNEL_SUBMIT_GPFIFO | |
| /dev/nvhost-* | 0xC0104809 | NVGPU_IOCTL_CHANNEL_ALLOC_OBJ_CTX | |
| /dev/nvhost-* | 0x4008480A | NVGPU_IOCTL_CHANNEL_FREE_OBJ_CTX | |
| /dev/nvhost-* | 0xC010480B | NVGPU_IOCTL_CHANNEL_ZCULL_BIND | |
| /dev/nvhost-* | 0xC018480C | NVGPU_IOCTL_CHANNEL_SET_ERROR_NOTIFIER | |
| /dev/nvhost-* | 0x4004480D | NVGPU_IOCTL_CHANNEL_OPEN | |
| /dev/nvhost-* | 0x0000480E | NVGPU_IOCTL_CHANNEL_ENABLE | |
| /dev/nvhost-* | 0x0000480F | NVGPU_IOCTL_CHANNEL_DISABLE | |
| /dev/nvhost-* | 0x00004810 | NVGPU_IOCTL_CHANNEL_PREEMPT | |
| /dev/nvhost-* | 0x00004811 | NVGPU_IOCTL_CHANNEL_FORCE_RESET | |
| /dev/nvhost-* | 0x40084812 | NVGPU_IOCTL_CHANNEL_EVENTS_CTRL | |
| /dev/nvhost-* | 0xC0104813 | NVGPU_IOCTL_CHANNEL_CYCLE_STATS_SNAPSHOT | |
| /dev/nvhost-* | 0x80804816 | ||
| /dev/nvhost-* | 0xC0104817 | ||
| /dev/nvhost-* | 0x40204818 | ||
| /dev/nvhost-* | 0xC0184819 | ||
| /dev/nvhost-* | 0xC020481A |