Assigning raw mode to PDO in KMDF problem.
in [Device Drivers]
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From: lukost on 12 Aug 2006 04:05 Hi, i want to create a raw-mode PDO for virtual port on my bus (using KMDF). The problem is the documentation says that WdfPdoInitAssignRawDevice can be used only before WdfDeviceCreate, and as such system doesn't ask for new INF file. Does anybody know how to set raw mode for a PDO in the way that would ensure that the user will be prompted for a new INF file? -- cheers, Lukasz Chróst
From: Doron Holan [MS] on 12 Aug 2006 11:26 raw mode and asking for a INF file are polar opposites. the entire reason that raw mode exists is that the PDO can be immediately started. so what happens is this when the PDO is enumerated as raw for the first timei 1) immediately started 2) pnp kicks off a user mode install and tries to find an INF match 3) if an INF match is made, the PDO is removed and then immediately restarted w/how the INF specified d -- Please do not send e-mail directly to this alias. this alias is for newsgroup purposes only. This posting is provided "AS IS" with no warranties, and confers no rights. "lukost" <lukost(a)gmail.com> wrote in message news:1155369941.436930.34470(a)75g2000cwc.googlegroups.com... Hi, i want to create a raw-mode PDO for virtual port on my bus (using KMDF). The problem is the documentation says that WdfPdoInitAssignRawDevice can be used only before WdfDeviceCreate, and as such system doesn't ask for new INF file. Does anybody know how to set raw mode for a PDO in the way that would ensure that the user will be prompted for a new INF file? -- cheers, Lukasz Chrst
From: Doron Holan [MS] on 12 Aug 2006 11:26 raw mode and asking for a INF file are polar opposites. the entire reason that raw mode exists is that the PDO can be immediately started. so what happens is this when the PDO is enumerated as raw for the first timei 1) immediately started 2) pnp kicks off a user mode install and tries to find an INF match 3) if an INF match is made, the PDO is removed and then immediately restarted w/how the INF specified d -- Please do not send e-mail directly to this alias. this alias is for newsgroup purposes only. This posting is provided "AS IS" with no warranties, and confers no rights. "lukost" <lukost(a)gmail.com> wrote in message news:1155369941.436930.34470(a)75g2000cwc.googlegroups.com... Hi, i want to create a raw-mode PDO for virtual port on my bus (using KMDF). The problem is the documentation says that WdfPdoInitAssignRawDevice can be used only before WdfDeviceCreate, and as such system doesn't ask for new INF file. Does anybody know how to set raw mode for a PDO in the way that would ensure that the user will be prompted for a new INF file? -- cheers, Lukasz Chrst
From: Pavel A. on 13 Aug 2006 06:36 "Doron Holan [MS]" wrote: > raw mode and asking for a INF file are polar opposites. the entire reason > that raw mode exists is that the PDO can be immediately started. so what > happens is this when the PDO is enumerated as raw for the first timei > > 1) immediately started > 2) pnp kicks off a user mode install and tries to find an INF match > 3) if an INF match is made, the PDO is removed and then immediately > restarted w/how the INF specified > > d Doron, The raw mode means that the bus driver alone can do something useful with the device, right? Can a bus driver create a raw DO so that PnP just accepts it "as is" and won't look for INF, display any UI *at all*? --PA ~~~~~~~~~~~ > "lukost" <lukost(a)gmail.com> wrote in message > news:1155369941.436930.34470(a)75g2000cwc.googlegroups.com... > Hi, i want to create a raw-mode PDO for virtual port on my bus (using > KMDF). > > The problem is the documentation says that WdfPdoInitAssignRawDevice > can be used only before WdfDeviceCreate, and as such system doesn't ask > for new INF file. > > Does anybody know how to set raw mode for a PDO in the way that would > ensure that the user will be prompted for a new INF file? > > -- > cheers, > Lukasz Chróst
From:
Lukasz Chróst on 13 Aug 2006 06:39
Thanks - in fact i've messed up with GUIDs and that's why my driver didn't even try to look for corresponding inf file (as it installed as 'standard device that doesn't need driver' - the one with question mark icon in device manager). > 1) immediately started > 2) pnp kicks off a user mode install and tries to find an INF match > 3) if an INF match is made, the PDO is removed and then immediately > restarted w/how the INF specified So that's why i get to IRP_MN_START_DEVICE right after loading the driver and after 'finding' the inf file. I have wondered why two EvtPrepareHardware callbacks occur. Thanks. -- Lukasz Chróst |