to guess the pciide capabilities, rather than trying to guess it by ourselve.
Add preliminary support for the 686b (Ultra/100) guessed from FreeBSD/linux
driver (datasheet not publically available, I contacted via).
Let chip-specific map routine do the autoconf printf if ide_name is NULL
(they may have more details about the controller than we have in pciide_attach)
XXX Currently disabled by default because it has some problems on macppc.
XXX Maybe some more initialization is needed, but there is few information
XXX about the chips.
Paul Kranenburg, many thanks !): the control register I/O is 4 byte long
although only one is used, but the control register is at offset 2, and not
0 as expected by IC code. Use bus_space_subregion() to get a handle which
points to the control register, and is one byte long.
is the same for the Ultra/33 and Ultra/66 version, so test writability of
the U66 enable bit (idea from Chris Cappuccio).
Thanks to David Carrel for testings.
XXX the datasheet for the HPT370 is wrong
While I'm there clear the DRIVE_DMA flag when we're going to use Ultra/DMA
where it was missed, so that wdc_print_modes() only prints what's used.
pci_attach_args *" instead of from four separate parameters which in
all cases were extracted from the same "struct pci_attach_args".
This both simplifies the driver api, and allows for alternate PCI
interrupt mapping schemes, such as one using the tables described in
the Intel Multiprocessor Spec which describe interrupt wirings for
devices behind pci-pci bridges based on the device's location rather
the bridge's location.
Tested on alpha and i386; welcome to 1.5Q
immediately with a lost interrupt on udma mode 2, downgrades to mode 1
at which point it silently corrupts data on high disk activity. This
happens on two out of 3 machines I own that exhibit high disk activity.
wdc drivers (like macppc's obio IDE interface) can use it. Also add
support to both wd attach line and to wdc_print_modes() to print
Ultra/{33,66,100} for respective UDMA modes (From Manuel Bouyer).
disable multiword DMA for these chips. multiword DMA can be forced with
options PCIIDE_AMD756_ENABLEDMA on rev D2 chips, but use at your own risk !
While I'm there remove a duplicate allocation of sc_wdcdev.nchannels in HPT
code.
Some AMD controllers have a bug which can look up the machine when using DMA, so
disable DMA for some revisions (info provided by AMD).
"options PCIIDE_AMD756_ENABLEDMA" can be used to force DMA on these chips.
<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>
also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.
