Nintendo Switch Brew

NV services: Difference between revisions

← Older editNewer edit →
ByLaws (talk | contribs)
13 edits
m Detail remap_op flags
No edit summary
Line 1: Line 1:
The Switch uses a customized NVIDIA driver.
= nvdrv, nvdrv:a, nvdrv:s, nvdrv:t =
= nvdrv, nvdrv:a, nvdrv:s, nvdrv:t =
This is "nns::nvdrv::INvDrvServices".
This is "nns::nvdrv::INvDrvServices".
Main NVIDIA driver service.


Each service is used by:
Each service is used by:
* "nvdrv": Applications.
* "nvdrv": Applications.
** [[#Permissions|Permission]] mask is [3.0.0+] 0xA82B ([1.0.0-2.3.0] 0x2B).
** [[#NvDrvPermission|Permission]] mask is [11.0.0+] 0xA83B ([1.0.0-2.3.0] 0x2B, [3.0.0+] 0xA82B).
* "nvdrv:a": Applets.
* "nvdrv:a": Applets.
** [[#Permissions|Permission]] mask is [3.0.0+] 0x10A9 ([1.0.0-2.3.0] 0xA9).
** [[#NvDrvPermission|Permission]] mask is [3.0.0+] 0x10A9 ([1.0.0-2.3.0] 0xA9).
* "nvdrv:s": Sysmodules.
* "nvdrv:s": Sysmodules.
** [[#Permissions|Permission]] mask is [3.0.0+] 0x439E ([1.0.0-2.3.0] 0x39E).
** [[#NvDrvPermission|Permission]] mask is [3.0.0+] 0x439E ([1.0.0-2.3.0] 0x39E).
* "nvdrv:t": Factory.
* "nvdrv:t": Factory.
** [[#Permissions|Permission]] mask is 0xFFFFFFFF.
** [[#NvDrvPermission|Permission]] mask is 0xFFFFFFFF.


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 50: Line 46:


== Open ==
== Open ==
Takes a type-0x5 input buffer for the device-path. Returns the output 32bit '''fd''' and the u32 '''error_code'''.
Takes a type-0x5 input buffer '''Path'''. Returns two output u32s '''FdOut''' and '''Err'''.


== Ioctl ==
== Ioctl ==
Takes a 32bit '''fd''', an u32 '''ioctl_cmd''', a type-0x21 input buffer, and a type-0x22 output buffer. Returns an output u32 ('''error_code''').
Takes two input u32s '''Fd''' and '''Iocode''', a type-0x21 input buffer and a type-0x22 output buffer. Returns an output u32 '''Err'''.


The addr/size for send/recv buffers are only set when the associated direction bit is set in the ioctl cmd (addr/size = 0 otherwise).
The addr/size for send/recv buffers are only set when the associated direction bit is set in the ioctl cmd (addr/size = 0 otherwise).


== Close ==
== Close ==
Takes a 32bit '''fd'''. Returns an output u32 ('''error_code''').
Takes an input u32 '''Fd'''. Returns an output u32 '''Err'''.


== Initialize ==
== Initialize ==
Takes two copy-handles ('''current_process''' and '''transfer_memory''') and an input u32 ('''transfer_memory_size'''). Returns an output u32 ('''error_code''').
Takes an input Process handle, an input TransferMemory handle and an input u32 '''Size'''. Returns an output u32 '''Err'''.


Webkit applet creates the transfer-memory with perm = 0 and size 0x300000.
Webkit applet creates the TransferMemory with perm == 0 and size == 0x300000.


== QueryEvent ==
== QueryEvent ==
Takes two input u32s ('''fd''' and '''event_id'''), with the second word immediately after the first one. Returns an output u32 ('''error_code''') and a copy-handle ('''event_handle''').
Takes two input u32s '''Fd''' and '''EvtId'''. Returns an output u32 '''Err''' and an output Event handle.


QueryEvent is only supported on (and implemented differently on):
QueryEvent is only supported on (and implemented differently on):
Line 83: Line 79:


== MapSharedMem ==
== MapSharedMem ==
Takes a copy-handle ('''transfer_memory''') and two input u32s ('''fd''' and '''nvmap_handle'''). Returns an output u32 ('''error_code''').
Takes an input TransferMemory handle and two input u32s '''Fd''' and '''HMem'''. Returns an output u32 '''Err'''.
 
'''HMem''' is a [[#/dev/nvmap|/dev/nvmap]] memory handle.


== GetStatus ==
== GetStatus ==
Takes no input. Returns 0x10-bytes and an output u32 ('''error_code''').
Takes no input. Returns an output [[#NvDrvStatus]] and an output u32 '''Err'''.


== SetAruidWithoutCheck ==
== SetAruidWithoutCheck ==
Takes an input u64 which must [[IPC_Marshalling|match]] the user-process PID ([[Applet_Manager_services#AppletResourceUserId|AppletResourceUserId]]). Returns an output u32 ('''error_code''').
Takes an input u64 '''Aruid'''. Returns an output u32 '''Err'''.
 
'''Aruid''' must [[IPC_Marshalling|match]] the current [[Applet_Manager_services#AppletResourceUserId|AppletResourceUserId]].


== SetAruid ==
== SetAruid ==
Takes a PID-descriptor and an u64 which must [[IPC_Marshalling|match]] the user-process PID ([[Applet_Manager_services#AppletResourceUserId|AppletResourceUserId]]). Returns an output u32 ('''error_code''').
Takes a PID-descriptor and an input [[Applet_Manager_services#AppletResourceUserId|AppletResourceUserId]]. Returns an output u32 '''Err'''.


== DumpStatus ==
== DumpStatus ==
No input or output.
No input/output.


== InitializeDevtools ==
== InitializeDevtools ==
Takes a copy-handle ('''transfer_memory''') and an input u32 ('''transfer_memory_size'''). Returns an output u32 ('''error_code''').
Takes an input TransferMemory handle and an input u32 '''Size'''. Returns an output u32 '''Err'''.


== Ioctl2 ==
== Ioctl2 ==
Takes a type-0x21 buffer, a type-0x22 buffer, a type-0x21 buffer, and two input u32s. Returns an output u32 ('''error_code''').
Takes two input u32s '''Fd''' and '''Iocode''', two type-0x21 input buffers and a type-0x22 output buffer. Returns an output u32 '''Err'''.


== Ioctl3 ==
== Ioctl3 ==
Takes a type-0x21 buffer, a type-0x22 buffer, another type-0x22 buffer, and two input u32s. Returns an output u32 (error_code).
Takes two input u32s '''Fd''' and '''Iocode''', a type-0x21 input buffer and two type-0x22 output buffers. Returns an output u32 '''Err'''.
Cmdhdr_word1 is 0x100B instead of 0xC0B.


== SetGraphicsFirmwareMemoryMarginEnabled ==
== SetGraphicsFirmwareMemoryMarginEnabled ==
Line 112: Line 111:
This sets a boolean value based on the input u64 and the value of the "nv!nv_graphics_firmware_memory_margin" system configuration, but only for "nvdrv" (the other services default to false).
This sets a boolean value based on the input u64 and the value of the "nv!nv_graphics_firmware_memory_margin" system configuration, but only for "nvdrv" (the other services default to false).


Official user-processes starting with 3.0.0 now use this at the end of nvdrv service init with value 0x1.
[3.0.0+] Official user-processes now use this at the end of nvdrv service init with value 0x1.
 
= nvmemp =
This is "nv::MemoryProfiler::IMemoryProfiler".


= Permissions =
/dev/nvhost-ctrl sends the ioctl NVHOST_IOCTL_CTRL_GET_CONFIG to check the config "nv!NV_MEMORY_PROFILER". If config_str returns "1", the application attempts to use nvmemp.
Each nvdrv service is initialized with a bitfield that controls access to nodes and other operations.


{| class="wikitable" border="1"
{| class="wikitable" border="1"
!  Bits
!  Name
!  Description
|-
|-
| 0
! Cmd || Name
| NvDrvPermission_Gpu
| Can access [[#Channels|/dev/nvhost-gpu]], [[#/dev/nvhost-ctrl-gpu|/dev/nvhost-ctrl-gpu]] and [[#/dev/nvhost-as-gpu|/dev/nvhost-as-gpu]].
|-
|-
| 1
| 0 || [[#Open_2|Open]]
| NvDrvPermission_GpuDebug
| Can access [[#/dev/nvhost-dbg-gpu|/dev/nvhost-dbg-gpu]] and [[#/dev/nvhost-prof-gpu|/dev/nvhost-prof-gpu]].
|-
|-
| 2
| 1 || [[#GetPid|GetPid]]
| NvDrvPermission_GpuSchedule
|}
| Can access [[#/dev/nvsched-ctrl|/dev/nvsched-ctrl]].
 
== Open ==
Takes an input TransferMemory handle and an input u32 '''Size'''. No output.
 
== GetPid ==
No input. Returns an output u32 '''Pid'''.
 
= nvdrvdbg =
This is "nns::nvdrv::INvDrvDebugFSServices".
 
{| class="wikitable" border="1"
|-
|-
| 3
! Cmd || Name
| NvDrvPermission_VIC
| Can access [[#Channels|/dev/nvhost-vic]].
|-
|-
| 4
| 0 || [[#DebugFSOpen]]
| NvDrvPermission_VideoEncoder
|-
| Can access [[#Channels|/dev/nvhost-msenc]].
| 1 || [[#DebugFSClose]]
|-
|-
| 5
| 2 || [[#GetDebugFSKeys]]
| NvDrvPermission_VideoDecoder
| Can access [[#Channels|/dev/nvhost-nvdec]].
|-
|-
| 6
| 3 || [[#GetDebugFSValue]]
| NvDrvPermission_TSEC
| Can access [[#Channels|/dev/nvhost-tsec]].
|-
|-
| 7
| 4 || [[#SetDebugFSValue]]
| NvDrvPermission_JPEG
|}
| Can access [[#Channels|/dev/nvhost-nvjpg]].
 
== DebugFSOpen ==
Takes an input Process handle. Returns an output u32 '''Handle'''.
 
== DebugFSClose ==
Takes an input u32 '''Handle'''. No output.
 
== GetDebugFSKeys ==
Takes an input u32 '''Handle''' and a type-0x6 output buffer '''OutValueBuf'''. Returns an output u32 '''Err'''.
 
== GetDebugFSValue ==
Takes an input u32 '''Handle''', a type-0x5 input buffer '''InKeyBuf''' and a type-0x6 output buffer '''OutValueBuf'''. Returns an output u32 '''Err'''.
 
== SetDebugFSValue ==
Takes an input u32 '''Handle''' and two type-0x5 input buffers '''InKeyBuf''' and '''InValueBuf'''. Returns an output u32 '''Err'''.
 
= nvgem:c =
This is "nv::gemcontrol::INvGemControl".
 
{| class="wikitable" border="1"
|-
|-
| 8
! Cmd || Name
| NvDrvPermission_Display
| Can access [[#Channels|/dev/nvhost-display]], [[#/dev/nvcec-ctrl|/dev/nvcec-ctrl]], [[#/dev/nvhdcp_up-ctrl|/dev/nvhdcp_up-ctrl]], [[#/dev/nvdisp-ctrl|/dev/nvdisp-ctrl]], [[#/dev/nvdisp-disp0, /dev/nvdisp-disp1|/dev/nvdisp-disp0]], [[#/dev/nvdisp-disp0, /dev/nvdisp-disp1|/dev/nvdisp-disp1]], [[#/dev/nvdcutil-disp0, /dev/nvdcutil-disp1|/dev/nvdcutil-disp0]] and [[#/dev/nvdcutil-disp0, /dev/nvdcutil-disp1|/dev/nvdcutil-disp1]].
|-
|-
| 9
| 0 || [[#Initialize_2|Initialize]]
| NvDrvPermission_ImportMemory
| Can duplicate [[#/dev/nvmap|nvmap]] handles from other processes with [[#NVMAP_IOC_FROM_ID|NVMAP_IOC_FROM_ID]].
|-
|-
| 10
| 1 || [[#GetEventHandle|GetEventHandle]]
| NvDrvPermission_NoCheckedAruid
| Can use [[#SetAruidWithoutCheck|SetAruidWithoutCheck]].
|-
|-
| 11
| 2 || [[#ControlNotification|ControlNotification]]
|
|-
| Can use [[#SetGraphicsFirmwareMemoryMarginEnabled|SetGraphicsFirmwareMemoryMarginEnabled]].
| 3 || [[#SetNotificationPerm|SetNotificationPerm]]
|-
|-
| 12
| 4 || [[#SetCoreDumpPerm|SetCoreDumpPerm]]
|
| Can duplicate exported [[#/dev/nvmap|nvmap]] handles from other processes with [[#NVMAP_IOC_FROM_ID|NVMAP_IOC_FROM_ID]].
|-
|-
| 13
| 5 || [1.0.0-4.1.0] [[#GetAruid|GetAruid]]
|
|  
|-
|-
| 14
| 6 || [[#Reset|Reset]]
|
| Can use [[#NVMAP_IOC_EXPORT_FOR_ARUID|NVMAP_IOC_EXPORT_FOR_ARUID]] and [[#NVMAP_IOC_REMOVE_EXPORT_FOR_ARUID|NVMAP_IOC_REMOVE_EXPORT_FOR_ARUID]].
|-
|-
| 15
| 7 || [3.0.0+]
|
|  
|}
|}


Nodes [[#/dev/nvmap|/dev/nvmap]], [[#/dev/nvhost-ctrl|/dev/nvhost-ctrl]] and [[#/dev/nverpt-ctrl|/dev/nverpt-ctrl]] are always accessible.
== Initialize ==
No input. Returns an output u32 '''Err'''.
 
== GetEventHandle ==
No input. Returns an output Event handle and an output u32 '''Err'''.
 
== ControlNotification ==
Takes an input bool '''Enable'''. Returns an output u32 '''Err'''.
 
== SetNotificationPerm ==
Takes an input u64 '''Aruid''' and an input bool '''Enable'''. Returns an output u32 '''Err'''.
 
== SetCoreDumpPerm ==
Takes an input u64 '''Aruid''' and an input bool '''Enable'''. Returns an output u32 '''Err'''.


= Ioctls =
== GetAruid ==
The ioctl number is generated with the following primitive (see Linux kernel):
No input. Returns an output u64 '''Aruid''' and an output u32 '''Err'''.


#define _IOC(inout, group, num, len) \
== Reset ==
    (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
No input. Returns an output u32 '''Err'''.


The following table contains known ioctls.
= nvgem:cd =
This is "nv::gemcoredump::INvGemCoreDump".


== /dev/nvhost-ctrl ==
{| class="wikitable" border="1"
{| class="wikitable" border="1"
! Value || Direction || Size || Description
|-
! Cmd || Name
|-
| 0 || [[#Initialize_3|Initialize]]
|-
| 1 || [[#GetAruid_2|GetAruid]]
|-
| 2 || [1.0.0-8.1.0] [[#ReadNextBlock|ReadNextBlock]]
|-
| 3 || [8.0.0+]
|-
| 4 || [8.0.0+]
|}
 
== Initialize ==
No input. Returns an output u32 '''Err'''.
 
== GetAruid ==
No input. Returns an output u64 '''Aruid''' and an output u32 '''Err'''.
 
== ReadNextBlock ==
Takes a type-0x6 output buffer. Returns an output u32 '''Err'''.
 
= nvdbg:d =
This is "nns::nvdrv::INvDrvDebugSvcServices". This was added with [10.0.0+].
 
This service has no commands.
 
= 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 all known ioctls.
 
== /dev/nvhost-ctrl ==
{| class="wikitable" border="1"
! Value || Direction || Size || Description
|-
|-
| 0xC0080014 || Inout || 8 || [[#NVHOST_IOCTL_CTRL_SYNCPT_READ]]
| 0xC0080014 || Inout || 8 || [[#NVHOST_IOCTL_CTRL_SYNCPT_READ]]
Line 1,504: Line 1,558:
  };
  };


== Channels ==
= Channels =
Channels are a concept for NVIDIA hardware blocks that share a common interface.
Channels are a concept for NVIDIA hardware blocks that share a common interface.


{| class="wikitable" border="1"
{| class="wikitable" border="1"
Line 1,523: Line 1,577:
|}
|}


== Channel Ioctls ==
== Ioctls ==
{| class="wikitable" border="1"
{| class="wikitable" border="1"
! Value || Size || Description
! Value || Size || Description
Line 1,942: Line 1,996:
   };
   };


= nvmemp =
= NvDrvPermission =
This is "nv::MemoryProfiler::IMemoryProfiler".
This is "nns::nvdrv::NvDrvPermission".
 
 
/dev/nvhost-ctrl sends the ioctl NVHOST_IOCTL_CTRL_GET_CONFIG to check the config "nv!NV_MEMORY_PROFILER". If config_str returns "1", the application attempts to use nvmemp.
 
{| class="wikitable" border="1"
{| class="wikitable" border="1"
!  Bits
!  Name
!  Description
|-
|-
! Cmd || Name
| 0
| Gpu
| Can access [[#Channels|/dev/nvhost-gpu]], [[#/dev/nvhost-ctrl-gpu|/dev/nvhost-ctrl-gpu]] and [[#/dev/nvhost-as-gpu|/dev/nvhost-as-gpu]].
|-
|-
| 0 || Open
| 1
| GpuDebug
| Can access [[#/dev/nvhost-dbg-gpu|/dev/nvhost-dbg-gpu]] and [[#/dev/nvhost-prof-gpu|/dev/nvhost-prof-gpu]].
|-
|-
| 1 || GetPid
| 2
|}
| GpuSchedule
 
| Can access [[#/dev/nvsched-ctrl|/dev/nvsched-ctrl]].
= nvdrvdbg =
This is "nns::nvdrv::INvDrvDebugFSServices".
 
{| class="wikitable" border="1"
|-
|-
! Cmd || Name
| 3
| VIC
| Can access [[#Channels|/dev/nvhost-vic]].
|-
|-
| 0 || [[#OpenDebugFS]]
| 4
| VideoEncoder
| Can access [[#Channels|/dev/nvhost-msenc]].
|-
|-
| 1 || [[#CloseDebugFS]]
| 5
| VideoDecoder
| Can access [[#Channels|/dev/nvhost-nvdec]].
|-
|-
| 2 || [[#GetDebugFSKeys]]
| 6
| TSEC
| Can access [[#Channels|/dev/nvhost-tsec]].
|-
|-
| 3 || GetDebugFSValue
| 7
| JPEG
| Can access [[#Channels|/dev/nvhost-nvjpg]].
|-
|-
| 4 || SetDebugFSValue
| 8
|}
| Display
 
| Can access [[#Channels|/dev/nvhost-display]], [[#/dev/nvcec-ctrl|/dev/nvcec-ctrl]], [[#/dev/nvhdcp_up-ctrl|/dev/nvhdcp_up-ctrl]], [[#/dev/nvdisp-ctrl|/dev/nvdisp-ctrl]], [[#/dev/nvdisp-disp0, /dev/nvdisp-disp1|/dev/nvdisp-disp0]], [[#/dev/nvdisp-disp0, /dev/nvdisp-disp1|/dev/nvdisp-disp1]], [[#/dev/nvdcutil-disp0, /dev/nvdcutil-disp1|/dev/nvdcutil-disp0]] and [[#/dev/nvdcutil-disp0, /dev/nvdcutil-disp1|/dev/nvdcutil-disp1]].
== OpenDebugFS ==
Takes a process handle. Returns a u32 '''fd'''.
 
== CloseDebugFS ==
Takes a u32 '''fd''' and closes it.
 
== GetDebugFSKeys ==
Takes a u32 '''fd''' and reads debug contents into a type-6 buffer.
 
= nvgem:c =
This is "nv::gemcontrol::INvGemControl".
 
{| class="wikitable" border="1"
|-
|-
! Cmd || Name
| 9
| ImportMemory
| Can duplicate [[#/dev/nvmap|nvmap]] handles from other processes with [[#NVMAP_IOC_FROM_ID|NVMAP_IOC_FROM_ID]].
|-
|-
| 0 || Initialize
| 10
| NoCheckedAruid
| Can use [[#SetAruidWithoutCheck|SetAruidWithoutCheck]].
|-
|-
| 1 || GetEventHandle
| 11
|
| Can use [[#SetGraphicsFirmwareMemoryMarginEnabled|SetGraphicsFirmwareMemoryMarginEnabled]].
|-
|-
| 2 || ControlNotification
| 12
|
| Can duplicate exported [[#/dev/nvmap|nvmap]] handles from other processes with [[#NVMAP_IOC_FROM_ID|NVMAP_IOC_FROM_ID]].
|-
|-
| 3 || SetNotificationPerm
| 13
|
|  
|-
|-
| 4 || SetCoreDumpPerm
| 14
|
| Can use [[#NVMAP_IOC_EXPORT_FOR_ARUID|NVMAP_IOC_EXPORT_FOR_ARUID]] and [[#NVMAP_IOC_REMOVE_EXPORT_FOR_ARUID|NVMAP_IOC_REMOVE_EXPORT_FOR_ARUID]].
|-
|-
| 5 || [1.0.0-4.1.0] GetAruid
| 15
|-
|
| 6 || Reset
|  
|-
| 7 || [3.0.0+]
|}
|}


= nvgem:cd =
= NvError =
This is "nv::gemcoredump::INvGemCoreDump".
This is "nns::nvdrv::NvError".


{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Cmd || Name
! Value || Name
|-
|-
| 0 || Initialize
| 0x0 || Success
|-
|-
| 1 || GetAruid
| 0x1 || NotImplemented
|-
|-
| 2 || [1.0.0-8.1.0] ReadNextBlock
| 0x2 || NotSupported
|-
|-
| 3 || [8.0.0+]
| 0x3 || NotInitialized
|-
|-
| 4 || [8.0.0+]
| 0x4 || BadParameter
|}
 
= nvdbg:d =
This is "nns::nvdrv::INvDrvDebugSvcServices". This was added with [10.0.0+].
 
This service has no commands.
 
= Errors =
Most nvidia driver commands return an error code apart from the normal return code.
 
{| class="wikitable" border="1"
|-
|-
! Value || Name
| 0x5 || Timeout
|-
|-
| 0x0 || NvError_Success
| 0x6 || InsufficientMemory
|-
|-
| 0x1 || NvError_NotImplemented
| 0x7 || ReadOnlyAttribute
|-
|-
| 0x2 || NvError_NotSupported
| 0x8 || InvalidState
|-
|-
| 0x3 || NvError_NotInitialized
| 0x9 || InvalidAddress
|-
|-
| 0x4 || NvError_BadParameter
| 0xA || InvalidSize
|-
|-
| 0x5 || NvError_Timeout
| 0xB || BadValue
|-
|-
| 0x6 || NvError_InsufficientMemory
| 0xD || AlreadyAllocated
|-
|-
| 0x7 || NvError_ReadOnlyAttribute
| 0xE || Busy
|-
|-
| 0x8 || NvError_InvalidState
| 0xF || ResourceError
|-
|-
| 0x9 || NvError_InvalidAddress
| 0x10 || CountMismatch
|-
|-
| 0xA || NvError_InvalidSize
| 0x11 || OverFlow
|-
|-
| 0xB || NvError_BadValue
| 0x1000 || InsufficientTransferMemory
|-
|-
| 0xD || NvError_AlreadyAllocated
| 0x10000 || InsufficientVideoMemory
|-
|-
| 0xE || NvError_Busy
| 0x10001 || BadSurfaceColorScheme
|-
|-
| 0xF || NvError_ResourceError
| 0x10002 || InvalidSurface
|-
|-
| 0x10 || NvError_CountMismatch
| 0x10003 || SurfaceNotSupported
|-
|-
| 0x11 || NvError_OverFlow
| 0x20000 || DispInitFailed
|-
|-
| 0x1000 || NvError_InsufficientTransferMemory
| 0x20001 || DispAlreadyAttached
|-
|-
| 0x10000 || NvError_InsufficientVideoMemory
| 0x20002 || DispTooManyDisplays
|-
|-
| 0x10001 || NvError_BadSurfaceColorScheme
| 0x20003 || DispNoDisplaysAttached
|-
|-
| 0x10002 || NvError_InvalidSurface
| 0x20004 || DispModeNotSupported
|-
|-
| 0x10003 || NvError_SurfaceNotSupported
| 0x20005 || DispNotFound
|-
|-
| 0x20000 || NvError_DispInitFailed
| 0x20006 || DispAttachDissallowed
|-
|-
| 0x20001 || NvError_DispAlreadyAttached
| 0x20007 || DispTypeNotSupported
|-
|-
| 0x20002 || NvError_DispTooManyDisplays
| 0x20008 || DispAuthenticationFailed
|-
|-
| 0x20003 || NvError_DispNoDisplaysAttached
| 0x20009 || DispNotAttached
|-
|-
| 0x20004 || NvError_DispModeNotSupported
| 0x2000A || DispSamePwrState
|-
|-
| 0x20005 || NvError_DispNotFound
| 0x2000B || DispEdidFailure
|-
|-
| 0x20006 || NvError_DispAttachDissallowed
| 0x2000C || DispDsiReadAckError
|-
|-
| 0x20007 || NvError_DispTypeNotSupported
| 0x2000D || DispDsiReadInvalidResp
|-
|-
| 0x20008 || NvError_DispAuthenticationFailed
| 0x30000 || FileWriteFailed
|-
|-
| 0x20009 || NvError_DispNotAttached
| 0x30001 || FileReadFailed
|-
|-
| 0x2000A || NvError_DispSamePwrState
| 0x30002 || EndOfFile
|-
|-
| 0x2000B || NvError_DispEdidFailure
| 0x30003 || FileOperationFailed
|-
|-
| 0x2000C || NvError_DispDsiReadAckError
| 0x30004 || DirOperationFailed
|-
|-
| 0x2000D || NvError_DispDsiReadInvalidResp
| 0x30005 || EndOfDirList
|-
|-
| 0x30000 || NvError_FileWriteFailed
| 0x30006 || ConfigVarNotFound
|-
|-
| 0x30001 || NvError_FileReadFailed
| 0x30007 || InvalidConfigVar
|-
|-
| 0x30002 || NvError_EndOfFile
| 0x30008 || LibraryNotFound
|-
|-
| 0x30003 || NvError_FileOperationFailed
| 0x30009 || SymbolNotFound
|-
|-
| 0x30004 || NvError_DirOperationFailed
| 0x3000A || MemoryMapFailed
|-
|-
| 0x30005 || NvError_EndOfDirList
| 0x3000F || IoctlFailed                       
|-
|-
| 0x30006 || NvError_ConfigVarNotFound
| 0x30010 || AccessDenied
|-
|-
| 0x30007 || NvError_InvalidConfigVar
| 0x30011 || DeviceNotFound
|-
|-
| 0x30008 || NvError_LibraryNotFound
| 0x30012 || KernelDriverNotFound
|-
|-
| 0x30009 || NvError_SymbolNotFound
| 0x30013 || FileNotFound
|-
|-
| 0x3000A || NvError_MemoryMapFailed
| 0x30014 || PathAlreadyExists
|-
|-
| 0x3000F || NvError_IoctlFailed                       
| 0xA000E || ModuleNotPresent
|}
 
= NvDrvStatus =
This is "nns::nvdrv::NvDrvStatus".
 
{| class="wikitable" border="1"
|-
|-
| 0x30010 || NvError_AccessDenied
! Offset
! Size
! Description
|-
|-
| 0x30011 || NvError_DeviceNotFound
| 0x0
| 0x4
| FreeSize
|-
|-
| 0x30012 || NvError_KernelDriverNotFound
| 0x4
| 0x4
| AllocatableSize
|-
|-
| 0x30013 || NvError_FileNotFound
| 0x8
| 0x4
| MinimumFreeSize
|-
|-
| 0x30014 || NvError_PathAlreadyExists
| 0xC
| 0x4
| MinimumAllocatableSize
|-
|-
| 0xA000E || NvError_ModuleNotPresent
| 0x10
| 0x10
| Reserved
|}
|}


= Panic =
= Notes =
In some cases, a panic may occur. NV forces a crash by doing:
In some cases, a panic may occur. NV forces a crash by doing:
  (void *)0 = 0xCAFE;
  (void *)0 = 0xCAFE;
End result is that the system hangs with a white-screen.
End result is that the system hangs with a white-screen.


== Gpfifo Panic ==
When the gpfifo data in the gpu_va buffers specified by the submitted gpfifo entries is invalid(?), eventually the user-process will be force-terminated after using the submit-gpfifo ioctl. It's unknown how exactly this is done.
When the gpfifo data in the gpu_va buffers specified by the submitted gpfifo entries is invalid(?), eventually the user-process will be force-terminated after using the submit-gpfifo ioctl. It's unknown how exactly this is done.


[[Category:Services]]
[[Category:Services]]
Retrieved from "https://switchbrew.org/wiki/NV_services"