Add WSDISPLAYIO_GET_FBINFO support to most TURBOchannel framebuffers

This adds WSDISPLAYIO_GET_FBINFO to cfb, mfb, sfb, tfb and xcfb
TURBOchannel framebuffers as used by pmax and alpha

It does not add support to px and pxg (they handle ioctls in common
code in stic.c and more careful wiring is required)

These changes allow an Xswfb X server to use the framebuffer
directly, albeit without any special acceleration

A subsequent change will re-enable X server building on pmax, and
also hopefully switch alpha from Xorg 1.10 to 1.20

Merge thorpej-cfargs2.

branches: 1.58.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.57.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.56.4;
Fix integer overflows noted by Silvio Cesare of InfoSect.

Someone^TM should name these idioms so we can eliminate this class of
copypasta bug.

adjust wsfont_find()

branches: 1.54.8; 1.54.12;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Clear RI_NO_AUTO in actual attach functions during autoconf(9)
for console devices that set the flag during consinit().

Set RI_NO_AUTO in ri_flg if *fb_common_init() is invoked from cnattach.
Untested.

branches: 1.51.2; 1.51.4;
u_intNN_t -> uintNN_t

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.48.2;
Follow up on the removal of MALLOC(), use malloc() instead.

branches: 1.47.2;
- device/softc split
- make sfbplus at least compilable

branches: 1.46.2; 1.46.4;
- assign 2 clause TNF license to the files cited as my ownership.
- abandon and remove my copyright notice from the three files were
copied in order to adapt HW I don't have; pvr.c, pm.c and stic.c

branches: 1.45.16; 1.45.18; 1.45.20; 1.45.22;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.44.2; 1.44.14; 1.44.16; 1.44.20;
Fix some caddr_t rototill fallout.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.42.14;
Add an extra cookie to the ioctl and mmap wsdisplay accessops that points
to the screen on which they are being called. The driver cannot guess
this by itself but it is needed to implement, at least, the getwschar and
putwschar functions in the correct place. There are no functional changes
yet.

Tested on i386 (vga, vga_raster, machfb, vesafb), macppc and sparc64.
Suggested and reviewed by macallan@.

Use ANSI function decls, apply static.

Use device_private().

branches: 1.39.4; 1.39.6; 1.39.8; 1.39.10; 1.39.12;
merge ktrace-lwp.

branches: 1.38.4;
nuke trailing whitespace

branches: 1.37.2; 1.37.4;
Fix and simplify incorrect check for screen blanking in WSDISPLAYIO_SVIDEO.

- Minor coding modifications for VDAC register access.
- De-__P() this time.
Tested valid with 4MAXINE.

- Restore the display to a sane state when leaving mapped mode.
- OR updates into sc_changed, and protect with spltty()/splx().

Make this compile again.

eliminate uvm_useracc() in favor of checking the return value of
copyin() or copyout().

uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.

branches: 1.32.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Leaving overflow-sensitive code, very similar to what was fixed
in the previous changes to cfb.c / sfb.c / xcfb.c, would not be clever.
Just modify in the similar way.

integer overflow. from silvio@qualys.com

alloc_attr -> allocattr

Approved by Matthias Drochner.

branches: 1.27.4; 1.27.6;
Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Reorganise the wsfont stuff slightly so that multiple display adapters
with different bit/byte order requirements can co-exist happily.

add/cleanup RCSIDs

Nuke fb_devconfig data structure which was found unnecessary to have.

use unsigned variable types as appropriate

branches: 1.22.2;
Fix spelling errors in comments.

branches: 1.21.2;
Fix errors in initializing the software copy of 256 entry colormap
stored in device softc. rasops_cmap[] array is orginazed in 256
iteration of 3 byte long RBG triplet, which does not match with
struct wsdisplay_cmap design.

Found glyph pixel order inverted on screen.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.17.4;
Place 34 by 80 console at the center of screen.

Respect video console colour designation by configration file.

Switch to improved flexible video console text rasterizer provided by
rasops and wsfont.

update for changed struct wsdisplay_accessops:show_screen signature.
no functional changes

Const poisoning.

branches: 1.12.2;
Enable 'WSSCREEN_REVERSE' scr-capability.

branches: 1.11.2; 1.11.4;
- Sweep abit preparing for code merge to have common 'vdacops' across
various graphics cards.

- Nuke debugging aids mistakenly committed.

- I finally learned CSR_A register of IMS G332 VDAC must be treated as
write only. Read-motify-write operation breaks its video mode.
- VDAC regiters are now initialized as ULTRIX does.

branches: 1.8.4;
- Unnecessary to have '#include <machine/autoconf.h>' for those.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

remove dummy "load_font" entries

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

- Fix an error in cursor color manipulation. 24bit RGB value was mistakenly
assigned to unsigned short variable.
- XXX PMAG-DV is supposed to emit virtical retrace interrupt, which can be
used for colormap/cursor update just like other TURBOchannel framebuffers.

- Fix many errors in cursor image manipulation. Hardware expect 2
bit/pixel format, not planer format. Assign MSB for cursor mask and
LSB for cursor image, where 10 means mask color and 11 for image color.
Image bit order of Bt431 and Bt459 are opposite to MIPS/Alpha processors
while IMS G332 and DC503 (PCC) are indentical.
- Assume that cursor images are 32 pixel padded as ULTRIX/DU ws interface
do. It's natural to X server.
- XXX Vast majority of codes are duplicated between mfb<->tfb and cfb<->sfb.
Code sharing might be achieved in the context of TGA/SFB+ merge.

- Assign copyright terms.

- Introduce MI NWSCONS drivers for TURBOchannel framebuffer option cards.

N.B., Digital UNIX never supports neither PMAG-AA (mfb) nor PMAG-BA (cfb)
for TC Alphas. PMAG-DV (xcfb) is Personal DECstation built in. All should
be good for console, but need much works for cursor/colormap completeness.

Merge thorpej-cfargs2.

branches: 1.58.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.57.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.56.4;
Fix integer overflows noted by Silvio Cesare of InfoSect.

Someone^TM should name these idioms so we can eliminate this class of
copypasta bug.

adjust wsfont_find()

branches: 1.54.8; 1.54.12;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Clear RI_NO_AUTO in actual attach functions during autoconf(9)
for console devices that set the flag during consinit().

Set RI_NO_AUTO in ri_flg if *fb_common_init() is invoked from cnattach.
Untested.

branches: 1.51.2; 1.51.4;
u_intNN_t -> uintNN_t

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.48.2;
Follow up on the removal of MALLOC(), use malloc() instead.

branches: 1.47.2;
- device/softc split
- make sfbplus at least compilable

branches: 1.46.2; 1.46.4;
- assign 2 clause TNF license to the files cited as my ownership.
- abandon and remove my copyright notice from the three files were
copied in order to adapt HW I don't have; pvr.c, pm.c and stic.c

branches: 1.45.16; 1.45.18; 1.45.20; 1.45.22;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.44.2; 1.44.14; 1.44.16; 1.44.20;
Fix some caddr_t rototill fallout.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.42.14;
Add an extra cookie to the ioctl and mmap wsdisplay accessops that points
to the screen on which they are being called. The driver cannot guess
this by itself but it is needed to implement, at least, the getwschar and
putwschar functions in the correct place. There are no functional changes
yet.

Tested on i386 (vga, vga_raster, machfb, vesafb), macppc and sparc64.
Suggested and reviewed by macallan@.

Use ANSI function decls, apply static.

Use device_private().

branches: 1.39.4; 1.39.6; 1.39.8; 1.39.10; 1.39.12;
merge ktrace-lwp.

branches: 1.38.4;
nuke trailing whitespace

branches: 1.37.2; 1.37.4;
Fix and simplify incorrect check for screen blanking in WSDISPLAYIO_SVIDEO.

- Minor coding modifications for VDAC register access.
- De-__P() this time.
Tested valid with 4MAXINE.

- Restore the display to a sane state when leaving mapped mode.
- OR updates into sc_changed, and protect with spltty()/splx().

Make this compile again.

eliminate uvm_useracc() in favor of checking the return value of
copyin() or copyout().

uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.

branches: 1.32.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Leaving overflow-sensitive code, very similar to what was fixed
in the previous changes to cfb.c / sfb.c / xcfb.c, would not be clever.
Just modify in the similar way.

integer overflow. from silvio@qualys.com

alloc_attr -> allocattr

Approved by Matthias Drochner.

branches: 1.27.4; 1.27.6;
Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Reorganise the wsfont stuff slightly so that multiple display adapters
with different bit/byte order requirements can co-exist happily.

add/cleanup RCSIDs

Nuke fb_devconfig data structure which was found unnecessary to have.

use unsigned variable types as appropriate

branches: 1.22.2;
Fix spelling errors in comments.

branches: 1.21.2;
Fix errors in initializing the software copy of 256 entry colormap
stored in device softc. rasops_cmap[] array is orginazed in 256
iteration of 3 byte long RBG triplet, which does not match with
struct wsdisplay_cmap design.

Found glyph pixel order inverted on screen.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.17.4;
Place 34 by 80 console at the center of screen.

Respect video console colour designation by configration file.

Switch to improved flexible video console text rasterizer provided by
rasops and wsfont.

update for changed struct wsdisplay_accessops:show_screen signature.
no functional changes

Const poisoning.

branches: 1.12.2;
Enable 'WSSCREEN_REVERSE' scr-capability.

branches: 1.11.2; 1.11.4;
- Sweep abit preparing for code merge to have common 'vdacops' across
various graphics cards.

- Nuke debugging aids mistakenly committed.

- I finally learned CSR_A register of IMS G332 VDAC must be treated as
write only. Read-motify-write operation breaks its video mode.
- VDAC regiters are now initialized as ULTRIX does.

branches: 1.8.4;
- Unnecessary to have '#include <machine/autoconf.h>' for those.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

remove dummy "load_font" entries

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

- Fix an error in cursor color manipulation. 24bit RGB value was mistakenly
assigned to unsigned short variable.
- XXX PMAG-DV is supposed to emit virtical retrace interrupt, which can be
used for colormap/cursor update just like other TURBOchannel framebuffers.

- Fix many errors in cursor image manipulation. Hardware expect 2
bit/pixel format, not planer format. Assign MSB for cursor mask and
LSB for cursor image, where 10 means mask color and 11 for image color.
Image bit order of Bt431 and Bt459 are opposite to MIPS/Alpha processors
while IMS G332 and DC503 (PCC) are indentical.
- Assume that cursor images are 32 pixel padded as ULTRIX/DU ws interface
do. It's natural to X server.
- XXX Vast majority of codes are duplicated between mfb<->tfb and cfb<->sfb.
Code sharing might be achieved in the context of TGA/SFB+ merge.

- Assign copyright terms.

- Introduce MI NWSCONS drivers for TURBOchannel framebuffer option cards.

N.B., Digital UNIX never supports neither PMAG-AA (mfb) nor PMAG-BA (cfb)
for TC Alphas. PMAG-DV (xcfb) is Personal DECstation built in. All should
be good for console, but need much works for cursor/colormap completeness.

Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.57.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.56.4;
Fix integer overflows noted by Silvio Cesare of InfoSect.

Someone^TM should name these idioms so we can eliminate this class of
copypasta bug.

adjust wsfont_find()

branches: 1.54.8; 1.54.12;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Clear RI_NO_AUTO in actual attach functions during autoconf(9)
for console devices that set the flag during consinit().

Set RI_NO_AUTO in ri_flg if *fb_common_init() is invoked from cnattach.
Untested.

branches: 1.51.2; 1.51.4;
u_intNN_t -> uintNN_t

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.48.2;
Follow up on the removal of MALLOC(), use malloc() instead.

branches: 1.47.2;
- device/softc split
- make sfbplus at least compilable

branches: 1.46.2; 1.46.4;
- assign 2 clause TNF license to the files cited as my ownership.
- abandon and remove my copyright notice from the three files were
copied in order to adapt HW I don't have; pvr.c, pm.c and stic.c

branches: 1.45.16; 1.45.18; 1.45.20; 1.45.22;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.44.2; 1.44.14; 1.44.16; 1.44.20;
Fix some caddr_t rototill fallout.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.42.14;
Add an extra cookie to the ioctl and mmap wsdisplay accessops that points
to the screen on which they are being called. The driver cannot guess
this by itself but it is needed to implement, at least, the getwschar and
putwschar functions in the correct place. There are no functional changes
yet.

Tested on i386 (vga, vga_raster, machfb, vesafb), macppc and sparc64.
Suggested and reviewed by macallan@.

Use ANSI function decls, apply static.

Use device_private().

branches: 1.39.4; 1.39.6; 1.39.8; 1.39.10; 1.39.12;
merge ktrace-lwp.

branches: 1.38.4;
nuke trailing whitespace

branches: 1.37.2; 1.37.4;
Fix and simplify incorrect check for screen blanking in WSDISPLAYIO_SVIDEO.

- Minor coding modifications for VDAC register access.
- De-__P() this time.
Tested valid with 4MAXINE.

- Restore the display to a sane state when leaving mapped mode.
- OR updates into sc_changed, and protect with spltty()/splx().

Make this compile again.

eliminate uvm_useracc() in favor of checking the return value of
copyin() or copyout().

uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.

branches: 1.32.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Leaving overflow-sensitive code, very similar to what was fixed
in the previous changes to cfb.c / sfb.c / xcfb.c, would not be clever.
Just modify in the similar way.

integer overflow. from silvio@qualys.com

alloc_attr -> allocattr

Approved by Matthias Drochner.

branches: 1.27.4; 1.27.6;
Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Reorganise the wsfont stuff slightly so that multiple display adapters
with different bit/byte order requirements can co-exist happily.

add/cleanup RCSIDs

Nuke fb_devconfig data structure which was found unnecessary to have.

use unsigned variable types as appropriate

branches: 1.22.2;
Fix spelling errors in comments.

branches: 1.21.2;
Fix errors in initializing the software copy of 256 entry colormap
stored in device softc. rasops_cmap[] array is orginazed in 256
iteration of 3 byte long RBG triplet, which does not match with
struct wsdisplay_cmap design.

Found glyph pixel order inverted on screen.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.17.4;
Place 34 by 80 console at the center of screen.

Respect video console colour designation by configration file.

Switch to improved flexible video console text rasterizer provided by
rasops and wsfont.

update for changed struct wsdisplay_accessops:show_screen signature.
no functional changes

Const poisoning.

branches: 1.12.2;
Enable 'WSSCREEN_REVERSE' scr-capability.

branches: 1.11.2; 1.11.4;
- Sweep abit preparing for code merge to have common 'vdacops' across
various graphics cards.

- Nuke debugging aids mistakenly committed.

- I finally learned CSR_A register of IMS G332 VDAC must be treated as
write only. Read-motify-write operation breaks its video mode.
- VDAC regiters are now initialized as ULTRIX does.

branches: 1.8.4;
- Unnecessary to have '#include <machine/autoconf.h>' for those.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

remove dummy "load_font" entries

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

- Fix an error in cursor color manipulation. 24bit RGB value was mistakenly
assigned to unsigned short variable.
- XXX PMAG-DV is supposed to emit virtical retrace interrupt, which can be
used for colormap/cursor update just like other TURBOchannel framebuffers.

- Fix many errors in cursor image manipulation. Hardware expect 2
bit/pixel format, not planer format. Assign MSB for cursor mask and
LSB for cursor image, where 10 means mask color and 11 for image color.
Image bit order of Bt431 and Bt459 are opposite to MIPS/Alpha processors
while IMS G332 and DC503 (PCC) are indentical.
- Assume that cursor images are 32 pixel padded as ULTRIX/DU ws interface
do. It's natural to X server.
- XXX Vast majority of codes are duplicated between mfb<->tfb and cfb<->sfb.
Code sharing might be achieved in the context of TGA/SFB+ merge.

- Assign copyright terms.

- Introduce MI NWSCONS drivers for TURBOchannel framebuffer option cards.

N.B., Digital UNIX never supports neither PMAG-AA (mfb) nor PMAG-BA (cfb)
for TC Alphas. PMAG-DV (xcfb) is Personal DECstation built in. All should
be good for console, but need much works for cursor/colormap completeness.

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

Fix integer overflows noted by Silvio Cesare of InfoSect.

Someone^TM should name these idioms so we can eliminate this class of
copypasta bug.

adjust wsfont_find()

branches: 1.54.8; 1.54.12;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Clear RI_NO_AUTO in actual attach functions during autoconf(9)
for console devices that set the flag during consinit().

Set RI_NO_AUTO in ri_flg if *fb_common_init() is invoked from cnattach.
Untested.

branches: 1.51.2; 1.51.4;
u_intNN_t -> uintNN_t

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.48.2;
Follow up on the removal of MALLOC(), use malloc() instead.

branches: 1.47.2;
- device/softc split
- make sfbplus at least compilable

branches: 1.46.2; 1.46.4;
- assign 2 clause TNF license to the files cited as my ownership.
- abandon and remove my copyright notice from the three files were
copied in order to adapt HW I don't have; pvr.c, pm.c and stic.c

branches: 1.45.16; 1.45.18; 1.45.20; 1.45.22;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.44.2; 1.44.14; 1.44.16; 1.44.20;
Fix some caddr_t rototill fallout.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.42.14;
Add an extra cookie to the ioctl and mmap wsdisplay accessops that points
to the screen on which they are being called. The driver cannot guess
this by itself but it is needed to implement, at least, the getwschar and
putwschar functions in the correct place. There are no functional changes
yet.

Tested on i386 (vga, vga_raster, machfb, vesafb), macppc and sparc64.
Suggested and reviewed by macallan@.

Use ANSI function decls, apply static.

Use device_private().

branches: 1.39.4; 1.39.6; 1.39.8; 1.39.10; 1.39.12;
merge ktrace-lwp.

branches: 1.38.4;
nuke trailing whitespace

branches: 1.37.2; 1.37.4;
Fix and simplify incorrect check for screen blanking in WSDISPLAYIO_SVIDEO.

- Minor coding modifications for VDAC register access.
- De-__P() this time.
Tested valid with 4MAXINE.

- Restore the display to a sane state when leaving mapped mode.
- OR updates into sc_changed, and protect with spltty()/splx().

Make this compile again.

eliminate uvm_useracc() in favor of checking the return value of
copyin() or copyout().

uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.

branches: 1.32.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Leaving overflow-sensitive code, very similar to what was fixed
in the previous changes to cfb.c / sfb.c / xcfb.c, would not be clever.
Just modify in the similar way.

integer overflow. from silvio@qualys.com

alloc_attr -> allocattr

Approved by Matthias Drochner.

branches: 1.27.4; 1.27.6;
Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Reorganise the wsfont stuff slightly so that multiple display adapters
with different bit/byte order requirements can co-exist happily.

add/cleanup RCSIDs

Nuke fb_devconfig data structure which was found unnecessary to have.

use unsigned variable types as appropriate

branches: 1.22.2;
Fix spelling errors in comments.

branches: 1.21.2;
Fix errors in initializing the software copy of 256 entry colormap
stored in device softc. rasops_cmap[] array is orginazed in 256
iteration of 3 byte long RBG triplet, which does not match with
struct wsdisplay_cmap design.

Found glyph pixel order inverted on screen.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.17.4;
Place 34 by 80 console at the center of screen.

Respect video console colour designation by configration file.

Switch to improved flexible video console text rasterizer provided by
rasops and wsfont.

update for changed struct wsdisplay_accessops:show_screen signature.
no functional changes

Const poisoning.

branches: 1.12.2;
Enable 'WSSCREEN_REVERSE' scr-capability.

branches: 1.11.2; 1.11.4;
- Sweep abit preparing for code merge to have common 'vdacops' across
various graphics cards.

- Nuke debugging aids mistakenly committed.

- I finally learned CSR_A register of IMS G332 VDAC must be treated as
write only. Read-motify-write operation breaks its video mode.
- VDAC regiters are now initialized as ULTRIX does.

branches: 1.8.4;
- Unnecessary to have '#include <machine/autoconf.h>' for those.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

remove dummy "load_font" entries

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

- Fix an error in cursor color manipulation. 24bit RGB value was mistakenly
assigned to unsigned short variable.
- XXX PMAG-DV is supposed to emit virtical retrace interrupt, which can be
used for colormap/cursor update just like other TURBOchannel framebuffers.

- Fix many errors in cursor image manipulation. Hardware expect 2
bit/pixel format, not planer format. Assign MSB for cursor mask and
LSB for cursor image, where 10 means mask color and 11 for image color.
Image bit order of Bt431 and Bt459 are opposite to MIPS/Alpha processors
while IMS G332 and DC503 (PCC) are indentical.
- Assume that cursor images are 32 pixel padded as ULTRIX/DU ws interface
do. It's natural to X server.
- XXX Vast majority of codes are duplicated between mfb<->tfb and cfb<->sfb.
Code sharing might be achieved in the context of TGA/SFB+ merge.

- Assign copyright terms.

- Introduce MI NWSCONS drivers for TURBOchannel framebuffer option cards.

N.B., Digital UNIX never supports neither PMAG-AA (mfb) nor PMAG-BA (cfb)
for TC Alphas. PMAG-DV (xcfb) is Personal DECstation built in. All should
be good for console, but need much works for cursor/colormap completeness.

Fix integer overflows noted by Silvio Cesare of InfoSect.

Someone^TM should name these idioms so we can eliminate this class of
copypasta bug.

adjust wsfont_find()

branches: 1.54.8; 1.54.12;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Clear RI_NO_AUTO in actual attach functions during autoconf(9)
for console devices that set the flag during consinit().

Set RI_NO_AUTO in ri_flg if *fb_common_init() is invoked from cnattach.
Untested.

branches: 1.51.2; 1.51.4;
u_intNN_t -> uintNN_t

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.48.2;
Follow up on the removal of MALLOC(), use malloc() instead.

branches: 1.47.2;
- device/softc split
- make sfbplus at least compilable

branches: 1.46.2; 1.46.4;
- assign 2 clause TNF license to the files cited as my ownership.
- abandon and remove my copyright notice from the three files were
copied in order to adapt HW I don't have; pvr.c, pm.c and stic.c

branches: 1.45.16; 1.45.18; 1.45.20; 1.45.22;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.44.2; 1.44.14; 1.44.16; 1.44.20;
Fix some caddr_t rototill fallout.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.42.14;
Add an extra cookie to the ioctl and mmap wsdisplay accessops that points
to the screen on which they are being called. The driver cannot guess
this by itself but it is needed to implement, at least, the getwschar and
putwschar functions in the correct place. There are no functional changes
yet.

Tested on i386 (vga, vga_raster, machfb, vesafb), macppc and sparc64.
Suggested and reviewed by macallan@.

Use ANSI function decls, apply static.

Use device_private().

branches: 1.39.4; 1.39.6; 1.39.8; 1.39.10; 1.39.12;
merge ktrace-lwp.

branches: 1.38.4;
nuke trailing whitespace

branches: 1.37.2; 1.37.4;
Fix and simplify incorrect check for screen blanking in WSDISPLAYIO_SVIDEO.

- Minor coding modifications for VDAC register access.
- De-__P() this time.
Tested valid with 4MAXINE.

- Restore the display to a sane state when leaving mapped mode.
- OR updates into sc_changed, and protect with spltty()/splx().

Make this compile again.

eliminate uvm_useracc() in favor of checking the return value of
copyin() or copyout().

uvm_useracc() tells us whether the mapping permissions allow access to
the desired part of an address space, and many callers assume that
this is the same as knowing whether an attempt to access that part of
the address space will succeed. however, access to user space can
fail for reasons other than insufficient permission, most notably that
paging in any non-resident data can fail due to i/o errors. most of
the callers of uvm_useracc() make the above incorrect assumption. the
rest are all misguided optimizations, which optimize for the case
where an operation will fail. we'd rather optimize for operations
succeeding, in which case we should just attempt the access and handle
failures due to insufficient permissions the same way we handle i/o
errors. since there appear to be no good uses of uvm_useracc(), we'll
just remove it.

branches: 1.32.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Leaving overflow-sensitive code, very similar to what was fixed
in the previous changes to cfb.c / sfb.c / xcfb.c, would not be clever.
Just modify in the similar way.

integer overflow. from silvio@qualys.com

alloc_attr -> allocattr

Approved by Matthias Drochner.

branches: 1.27.4; 1.27.6;
Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command". ERESTART is -1, which can lead to
confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4. No ioctl code should now return -1 anywhere. The
ioctl() system call is now properly restartable.

Reorganise the wsfont stuff slightly so that multiple display adapters
with different bit/byte order requirements can co-exist happily.

add/cleanup RCSIDs

Nuke fb_devconfig data structure which was found unnecessary to have.

use unsigned variable types as appropriate

branches: 1.22.2;
Fix spelling errors in comments.

branches: 1.21.2;
Fix errors in initializing the software copy of 256 entry colormap
stored in device softc. rasops_cmap[] array is orginazed in 256
iteration of 3 byte long RBG triplet, which does not match with
struct wsdisplay_cmap design.

Found glyph pixel order inverted on screen.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.17.4;
Place 34 by 80 console at the center of screen.

Respect video console colour designation by configration file.

Switch to improved flexible video console text rasterizer provided by
rasops and wsfont.

update for changed struct wsdisplay_accessops:show_screen signature.
no functional changes

Const poisoning.

branches: 1.12.2;
Enable 'WSSCREEN_REVERSE' scr-capability.

branches: 1.11.2; 1.11.4;
- Sweep abit preparing for code merge to have common 'vdacops' across
various graphics cards.

- Nuke debugging aids mistakenly committed.

- I finally learned CSR_A register of IMS G332 VDAC must be treated as
write only. Read-motify-write operation breaks its video mode.
- VDAC regiters are now initialized as ULTRIX does.

branches: 1.8.4;
- Unnecessary to have '#include <machine/autoconf.h>' for those.

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

remove dummy "load_font" entries

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

- Fix an error in cursor color manipulation. 24bit RGB value was mistakenly
assigned to unsigned short variable.
- XXX PMAG-DV is supposed to emit virtical retrace interrupt, which can be
used for colormap/cursor update just like other TURBOchannel framebuffers.

- Fix many errors in cursor image manipulation. Hardware expect 2
bit/pixel format, not planer format. Assign MSB for cursor mask and
LSB for cursor image, where 10 means mask color and 11 for image color.
Image bit order of Bt431 and Bt459 are opposite to MIPS/Alpha processors
while IMS G332 and DC503 (PCC) are indentical.
- Assume that cursor images are 32 pixel padded as ULTRIX/DU ws interface
do. It's natural to X server.
- XXX Vast majority of codes are duplicated between mfb<->tfb and cfb<->sfb.
Code sharing might be achieved in the context of TGA/SFB+ merge.

- Assign copyright terms.

- Introduce MI NWSCONS drivers for TURBOchannel framebuffer option cards.

N.B., Digital UNIX never supports neither PMAG-AA (mfb) nor PMAG-BA (cfb)
for TC Alphas. PMAG-DV (xcfb) is Personal DECstation built in. All should
be good for console, but need much works for cursor/colormap completeness.