Difference between revisions of "Nvnflinger services"
(Document the specifics of the type parameter for AdjustRefcount) |
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| 2 || [[#GetNativeHandle]] | | 2 || [[#GetNativeHandle]] | ||
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| − | | 3 || [[#TransactParcelAuto]] | + | | 3 || [3.0.0+] [[#TransactParcelAuto]] |
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Command(s) from here are constantly used while displaying gfx. | Command(s) from here are constantly used while displaying gfx. | ||
| − | TransactParcel is used by 1.0.0 official user-processes, while starting with | + | TransactParcel is used by 1.0.0 official user-processes, while starting with 3.0.0 TransactParcelAuto is used instead. |
| + | |||
| + | For IHOSBinderDriver, the below '''ID''' is loaded from the layer's [[Display_services#NativeWindow]]. | ||
== TransactParcel == | == TransactParcel == | ||
| − | Takes a s32 ( | + | Takes a s32 ('''ID'''), an u32 ('''code'''), a type-0x5 input buffer ('''parcel_data'''), a type-0x6 output buffer ('''parcel_reply''') and an input u32 ('''flags'''). Each word is placed immediately after the previous word. |
Analogous to "onTransact" from "android.os.IServiceManager". | Analogous to "onTransact" from "android.os.IServiceManager". | ||
== AdjustRefcount == | == AdjustRefcount == | ||
| − | Takes 3 input s32s: | + | |
| + | Takes 3 input s32s: '''ID''', '''addval''', and '''type'''. Each word immediately follows the previous word. No additional output. | ||
| + | |||
| + | '''type''' indicates whether the strong reference count or weak reference count will be affected. 0 indicates the weak reference count, while 1 indicates the strong reference count. | ||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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| ? || -1 || 0 | | ? || -1 || 0 | ||
|} | |} | ||
| + | |||
| + | During init, {addval=1, type=0} is used then {addval=1, type=1} is used. | ||
== GetNativeHandle == | == GetNativeHandle == | ||
| − | Takes an input s32 and u32, with the latter immediately following the previous word. Returns an output event handle. | + | Takes an input s32 ('''ID''') and u32, with the latter immediately following the previous word. Returns an output event handle. |
== TransactParcelAuto == | == TransactParcelAuto == | ||
| − | Takes a s32 ( | + | Takes a s32 ('''ID'''), an u32 ('''code'''), a type-0x21 input buffer ('''parcel_data'''), a type-0x22 output buffer ('''parcel_reply''') and an input u32 ('''flags'''). Each word is placed immediately after the previous word. |
| + | |||
| + | [[Category:Services]] | ||
Latest revision as of 17:47, 28 January 2019
Nvnflinger is responsible for mediating the communication between vi and nvservices. The vi sysmodule relays display accesses to nvnflinger which in turn uses /dev/nvdisp-ctrl and /dev/nvdisp-disp0, /dev/nvdisp-disp1 from nvservices.
dispdrv
This is "nns::hosbinder::IHOSBinderDriver".
| Cmd | Name |
|---|---|
| 0 | #TransactParcel |
| 1 | #AdjustRefcount |
| 2 | #GetNativeHandle |
| 3 | [3.0.0+] #TransactParcelAuto |
This uses Android code.
Command(s) from here are constantly used while displaying gfx.
TransactParcel is used by 1.0.0 official user-processes, while starting with 3.0.0 TransactParcelAuto is used instead.
For IHOSBinderDriver, the below ID is loaded from the layer's Display_services#NativeWindow.
TransactParcel
Takes a s32 (ID), an u32 (code), a type-0x5 input buffer (parcel_data), a type-0x6 output buffer (parcel_reply) and an input u32 (flags). Each word is placed immediately after the previous word.
Analogous to "onTransact" from "android.os.IServiceManager".
AdjustRefcount
Takes 3 input s32s: ID, addval, and type. Each word immediately follows the previous word. No additional output.
type indicates whether the strong reference count or weak reference count will be affected. 0 indicates the weak reference count, while 1 indicates the strong reference count.
| Called by official function | addval | type |
|---|---|---|
| "android::BpBinder::onFirstRef" | 1 | 1 |
| "android::BpBinder::onLastStrongRef" | -1 | 1 |
| ? | 1 | 0 |
| ? | -1 | 0 |
During init, {addval=1, type=0} is used then {addval=1, type=1} is used.
GetNativeHandle
Takes an input s32 (ID) and u32, with the latter immediately following the previous word. Returns an output event handle.
TransactParcelAuto
Takes a s32 (ID), an u32 (code), a type-0x21 input buffer (parcel_data), a type-0x22 output buffer (parcel_reply) and an input u32 (flags). Each word is placed immediately after the previous word.