* First baby steps in letting our drivers use the new I/O request/scheduler

architecture: for now, we do this on the lowest layer only, therefore all
  requests are handled synchronously (ie. in the scheduler's thread).
* Instead of using the block_io module, scsi_disk (and scsi_cd) are now
  exporting a device on their own, and use an I/O scheduler with an appropriate
  DMA resource.
* There are still lots of TODOs, and it can easily panic - don't update if
  you intend to demo Haiku.
* scsi_periph now only has an io() function that get an io_operation, instead
  of the previous read/write functions, moved preferred CCB size from those
  functions into the device registration.
* Changed all scsi_periph files to C++.
* scsi_cd ported, too, but untested.
* Removed block_io from image - it will be removed completely soon.
* Temporarily commented an ASSERT() in the ATA bus manager (in case you use
  it); it's sometimes triggered by the code now, and I haven't yet looked into
  the issue -- doesn't seem to harm, at least.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26828 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/jam/HaikuImage

@@ -160,7 +160,7 @@ AddFilesToHaikuImage beos system add-ons kernel debugger
 AddFilesToHaikuImage beos system add-ons kernel file_systems
 	: $(BEOS_ADD_ONS_FILE_SYSTEMS) ;
 AddFilesToHaikuImage beos system add-ons kernel generic
-	: block_io dpc ide_adapter locked_pool mpu401 scsi_periph ;
+	: dpc ide_adapter locked_pool mpu401 scsi_periph ;
 AddFilesToHaikuImage beos system add-ons kernel partitioning_systems
 	: intel session ;
 AddFilesToHaikuImage beos system add-ons kernel interrupt_controllers
@@ -372,7 +372,7 @@ AddFilesToHaikuImage beos system : zbeos ;
 AddBootModuleSymlinksToHaikuImage
 	pci $(X86_ONLY)isa config_manager ide scsi usb
 	$(PPC_ONLY)openpic
-	block_io ide_adapter locked_pool scsi_periph
+	ide_adapter locked_pool scsi_periph
 	ahci generic_ide_pci it8211 legacy_sata silicon_image_3112 $(X86_ONLY)ide_isa
 	<usb>uhci <usb>ohci <usb>ehci
 	scsi_cd scsi_disk usb_disk