Rafael – Create a device path using the port/multiplier port information (see BuildDevicePath), then use LocateDevicePath.
From: Rafael Machado [mailto:rafaelrodrigues.mach...@gmail.com] Sent: Wednesday, October 29, 2014 3:32 AM To: edk2-devel Subject: Re: [edk2] Get BlockIo protocol from Ata Device based on Port and Multiplier Port Hi Feng Thanks for the answer. Just to explain better my scenario. What I need to do is execute some ata commands, like read verify sector, this is done sending ata commands to some Port / Multiplier port, but in case this device has a Block Io protocol, I need to use this protocol instead of sending a specific ata command (so my application will be more generic) This is why I need to know if a specific ata device has an associated block io protocol, based on its position (Port/Multiplier port location) If my explanation is not that clear I can try to explain in another way. Thanks a lot for the answer. Rafael R. Machado 2014-10-28 22:55 GMT-02:00 Tian, Feng <feng.t...@intel.com<mailto:feng.t...@intel.com>>: Rafael, Why don’t you directly locate all handles at which BlockIo protocols are installed? After you get these handles, you can get device path from these handles to know which one is you want to access. Thanks Feng From: Rafael Machado [mailto:rafaelrodrigues.mach...@gmail.com<mailto:rafaelrodrigues.mach...@gmail.com>] Sent: Monday, October 27, 2014 18:40 To: edk2-devel Subject: [edk2] Get BlockIo protocol from Ata Device based on Port and Multiplier Port Hi everyone. I have a system, that has a Storage device. This device can be detected at Port 0, Multiplier 0 by the EFI_ATA_PASS_THRU_PROTOCOL.GetNextDevice() typedef EFI_STATUS (EFIAPI *EFI_ATA_PASS_THRU_GET_NEXT_DEVICE) ( IN EFI_ATA_PASS_THRU_PROTOCOL *This, IN UINT16 Port, IN OUT UINT16 *PortMultiplierPort ); Now I need to know the EFI_BLOCK_IO_PROTOCOL "instance" that I need to use to access this device. Is there a way to do this ? Thanks and Regards Rafael R. Machado ------------------------------------------------------------------------------ _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/edk2-devel
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