| Commit message (Collapse) | Author | Age | Files | Lines |
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- Validate that user supplied control message length in sendmsg(2)
is not negative.
Security: SA-16:18
Security: CVE-2016-1886
Security: SA-16:19
Security: CVE-2016-1887
Submitted by: C Turt <cturt hardenedbsd.org>
Approved by: so
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o Fix incorrect argument validation in sysarch(2). [SA-16:15]
o Fix Hyper-V KVP (Key-Value Pair) daemon indefinite sleep. [EN-16:04]
Errata: FreeBSD-EN-16:04.hyperv
Security: FreeBSD-SA-16:14.openssh-xauth, CVE-2016-3115
Security: FreeBSD-SA-16:15.sysarch, CVE-2016-1885
Approved by: so
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Fix vt(4) crash with improper ioctl parameters. [EN-15:01]
Updated base system OpenSSL to 1.0.1l. [EN-15:02]
Fix freebsd-update libraries update ordering issue. [EN-15:03]
Approved by: so
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kernel if the system has a fiber-based Intel XL710 adapter installed.
In addition ixl version 1.2.8 and ixlv version 1.1.18 give:
- Improved VF stability (thanks to Ryan Stone for this)
- RSS fixes
- link detection in the ixlv driver
- new sysctl's added
- corrected media reporting
Submitted by: jfv
Approved by: re
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Return BUS_PROBE_DEFAULT instead of BUS_PROBE_VENDOR or 0 for in-tree
driver. This change was verified by Microsoft.
Approved by: re (kib)
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MFC r273402:
Fix an issue where a FreeBSD virtual machine provisioned in
the Microsoft Azure service does not recognize the second
attached disk on the system.
PR: 194376
Approved by: re (delphij)
Sponsored by: The FreeBSD Foundation
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Do nothing in vt_upgrade if there is no vt driver
Previously, if no drivers attached at boot we would panic with
"vtbuf_fill_locked begin.tp_row 0 must be < screen height 0".
PR: 192248
Approved by: re
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MF10: r273037
MFC: r272537
When the screen size is unknown, it's set to 0x0. We can't use that as
the buffer size, otherwise, functions such as vtbuf_fill() will fail.
This fixes a panic on RaspberryPi, where there's no vt(4) backend
configured early in boot.
PR: 193981
Tested by: danilo@
Approved by: re (marius)
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MF10: r273036
MFC: r272416
Add new functions to manipulate these mode & state, instead of calling
kbdd_ioctl() everyhere.
This fixes at least two bugs:
1. The state of the Scroll Lock LED and the state of scroll mode
could be out-of-sync. For instance, if one enables scroll mode on
window #1 and switches to window #2, the LED would remain on, but
the window wouldn't be in scroll mode.
Similarily, when switching between a console and an X.Org
session, the LED states could be inconsistent with the real
state.
2. When exiting from an X.Org session, the user could be unable to
type anything. The workaround was to switch to another console
window and come back.
Differential Revision: https://reviews.freebsd.org/D821
Reviewed by: ray@
Approved by: re (marius), ray@
Tested by: kwm@
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Since introducing the extra mapping in r250103 (head) for architectural performance
events we have actually counted 'Branch Instruction Retired' when people
asked for 'Unhalted core cycles' using the 'unhalted-core-cycles' event mask
mnemonic.
Reviewed by: jimharris
Discussed with: gnn, rwatson
Sponsored by: DARPA/AFRL
Approved by: re (gjb)
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This switches code to using xpt_rescan() routine, irrelevant to locking.
Using xpt_action() directly requires knowledge about higher level locks,
that SIM does not need to have.
This code is obsolete, but that is not a reason to crash.
Approved by: re (marius)
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When we fail to get a USB reference we should just return, because
there are no more references held.
Approved by: re, marius
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- Fix XHCI driver for devices which have more than 15 physical root HUB
ports. The current bitmap array was too small to hold more than 16
bits and would at some point toggle the context size, which then would
trigger an enumeration fault and cause a fallback to the EHCI
companion controller, if any.
- Make sure we always set the maximum number of valid contexts.
- Set default cycle state in case of early interrupts.
Approved by: re, marius
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Instead of creating the full range of possible ports, try to figure
out the actual number of so-called "embedded jacks" which are present
when a USB MIDI device is attaching.
Approved by: re, gjb
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Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft,
many thanks for their continued support of FreeBSD.
While I'm there, also implement a new build knob, WITHOUT_HYPERV to
disable building and installing of the HyperV utilities when necessary.
The HyperV utilities are only built for i386 and amd64 targets.
Approved by: re (gjb)
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Revert changes to shared code of the ixl and ixlv drivers to allow
for easier long-term maintainability.
Restrict the drivers to building on amd64 for now as it is
only tested on that 64bit architecture.
Just depend on PCI and neither INET nor INET6; also make sure we
can build individual drivers and they do not depend on each other
anymore.
Reviewed by: gnn, eric.joyner intel.com
PR: 193824
Approved by: re (gjb)
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Add new USB IDs.
PR: 193775
Approved by: re, gjb
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Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation
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r272128 reversal.
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation
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Though this passes the buildworld test, this fails during
installworld with:
make[3]: "/releng/scripts-release/chroots/10/i386/release/etc/devd/Makefile"
line 13: Malformed conditional (${MK_HYPERV} != "no")
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation
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Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft,
many thanks for their continued support of FreeBSD.
While I'm there, also implement a new build knob, WITHOUT_HYPERV to
disable building and installing of the HyperV utilities when necessary.
The HyperV utilities are only built for i386 and amd64 targets.
Approved by: re (gjb)
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Remove #ifdef-s to reduce difference to upstream.
Pointed by: kib
Approved by: re (glebius)
Sponsored by: The FreeBSD Foundation
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Some XHCI hardware requires dropping the endpoint context before
adding it again.
Approved by: re, glebius
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For ECORE_DBG_BREAK_IF() ECORE_BUG() ECORE_BUG_ON() check bxe_debug flag before printing error message.
Approved by: re(gjb)
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SVN revisions in this MFC:
271756 271758 271868 271871 271872 271899
Detailed commit list:
r271756:
vt(4): Fix out-of-bounds array access in VT_ACTIVATE ioctl handling
CID: 1229964
r271758
vt(4): Use strncpy() to copy into a fixed-size buffer
CID: 1230007
r271868:
vt(4): Remove vt_buf->vb_dirtymask
This structure and the associated functions were unused since the
implementation of vd_bitblt_text_t callbacks.
r271871:
vt(4): Rewrite history scrolling
It's now possible to scroll up the 500 hard-coded lines of history, not
just a fraction of them. For instance, one can reach the top of the boot
process.
Sometimes, when scrolling or when changing the screen size (by changing
the font or loading a KMS driver for instance), one could see the
history cycling (old content appeared below latest lines). This is
fixed.
Now, when the resolution changes are more lines can be shown, the
displayed area is adjusted so that, if the screen was filled with
content before, it's filled with content after as well: more history
is visible, instead of having blank lines below the previously visible
content.
r271872:
vt(4): Remove superfluous word in comment
Submitted by: brueffer@
r271899:
Make gcc happy by initialising the variable only set in a couple of
case statements without a default.
Approved by: re (marius)
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Merge atse(4) interrupt handling and race condition fixes from
cheribsd.
Obtained from: cheribsd
Submitted by: rwatson, emaste
Sponsored by: DARPA/AFRL
Approved by: re (delphij)
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cxgbe(4): knobs to enable/disable PAUSE frame based flow control.
Approved by: re (glebius)
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o Add sysctls to enable/disable potentially dengerous key combinations, like
reboot/halt/debug.
o Add support for most key combinations supported by syscons(4).
o Some spelling fixes
o Remove stray whitespaces.
o Switch vt(4) to traditional behaviour with copy-paste same as syscons(4) do.
o Fix stray char on paste.
o Fix 'function declaration isn't a prototype' warning.
o vt(4): Enclose vt_mouse_paste() prototype inside #ifndef SC_NO_CUTPASTE/#endif
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
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Workaround for receiving Voice Calls using the E1750 dongle from
Huawei. It might appear as if the firmware is allocating memory blocks
according to the USB transfer size and if there is initially a lot of
data, like at the answering machine prompt, it simply dies without any
apparent reason. The simple workaround for this is to force a zero
length packet at hardware level after every 512 bytes of data. This
will force the other side to use smaller memory blocks aswell.
Approved by: re, gjb
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This feature is required by Mesa 9.2+. Without this, a GL application
crashes with the following message:
# glxinfo
name of display: :0.0
Gen6+ requires Kernel 3.6 or later.
Assertion failed: (ctx->Version > 0), function handle_first_current,
file ../../src/mesa/main/context.c, line 1498.
Abort (core dumped)
Now, Mesa 10.2.4 and 10.3-rc3 works fine:
# glxinfo
name of display: :0
display: :0 screen: 0
direct rendering: Yes
...
OpenGL renderer string: Mesa DRI Intel(R) 965GM
OpenGL version string: 2.1 Mesa 10.2.4
...
The code was imported from Linux 3.8.13.
This an MFC of r271705.
Approved by: re (glebius)
Reviewed by: kib@
Tested by: kwm@, danfe@, Henry Hu,
Lundberg, Johannes <johannes@brilliantservice.co.jp>,
Johannes Dieterich <dieterich.joh@gmail.com>,
Lutz Bichler <lutz.bichler@gmail.com>,
Relnotes: yes
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r259550 (glebius):
Make nmdm(4) destroy devices when both sides of a pair are disconnected.
This makes it possible to kldunload nmdm.ko when there are no users of it.
r271350:
Fix issue with nmdm and leading zeros in device name.
The nmdm code enforces a number between the 'nmdm' and 'A|B' portions
of the device name. This is then used as a unit number, and sprintf'd
back into the tty name. If leading zeros were used in the name,
the created device name is different than the string used for the
clone-open (e.g. /dev/nmdm0001A will result in /dev/nmdm1A).
Since unit numbers are no longer required with the updated tty
code, there seems to be no reason to force the string to be a
number. The fix is to allow an arbitrary string between
'nmdm' and 'A|B', within the constraints of devfs names. This allows
all existing user of numeric strings to continue to work, and also
allows more meaningful names to be used, such as bhyve VM names.
PR: 192281
Approved by: re (glebius)
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SVN revisions in this MFC:
269779 270705 270706 271180 271250 271253 271682 271684
Detailed commit list:
r269779:
fbd: Fix a bug where vt_fb_attach() success would be considered a failure
vt_fb_attach() currently always returns 0, but it could return a code
defined in errno.h. However, it doesn't return a CN_* code. So checking
its return value against CN_DEAD (which is 0) is incorrect, and in this
case, a success becomes a failure.
The consequence was unimportant, because the caller (drm_fb_helper.c)
would only log an error message in this case. The console would still
work.
Approved by: nwhitehorn
r270705:
vt(4): Add cngrab() and cnungrab() callbacks
They are used when a panic occurs or when entering a DDB session for
instance.
cngrab() forces a vt-switch to the console window, no matter if the
original window is another terminal or an X session. However, cnungrab()
doesn't vt-switch back to the original window currently.
r270706:
drm: Don't "taskqueue" vt-switch if under DDB/panic situation
If DDB is active, we can't use a taskqueue thread to switch away from
the X window, because this thread can't run.
Reviewed by: ray@
Approved by: ray@
r271180:
vt_vga: vd_setpixel_t and vd_drawrect_t are noop in text mode
r271250:
vt(4): Change the terminal and buffer sizes, even without a font
This fixes a bug where scroll lock would not work for tty #0 when using
vt_vga's textmode. The reason was that this window is created with a
static 256x100 buffer, larger than the real size of 80x25.
Now, in vt_change_font() and vt_compute_drawable_area(), we still
perform operations even of the window has no font loaded (this is the
case in textmode here vw->vw_font == NULL). One of these operation
resizes the buffer accordingly.
In vt_compute_drawable_area(), we take the terminal size as is (ie.
80x25) for the drawable area.
The font argument to vt_set_border() is removed (it was never used) and
the code now uses the computed drawable area instead of re-doing its own
calculation.
Reported by: Harald Schmalzbauer <h.schmalzbauer_omnilan.de>
Tested by: Harald Schmalzbauer <h.schmalzbauer_omnilan.de>
r271253:
pause_sbt(): Take the cold path (ie. use DELAY()) if KDB is active
This fixes a panic in the i915 driver when one uses debug.kdb.enter=1
under vt(4).
PR: 193269
Reported by: emaste@
Submitted by: avg@
r271682:
vt(4): Fix a LOR which occurs during a call to vt_upgrade()
Reported by: kib@
Review: https://reviews.freebsd.org/D785
Reviewed by: ray@
Approved by: ray@
r271684:
vt(4): Use vt_fb_drawrect() and vt_fb_setpixel() in all vt_fb-derivative
Review: https://reviews.freebsd.org/D789
Reviewed by: nwhitehorn
Approved by: nwhitehorn
Approved by: re (gjb)
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Initiate error recovery stats fail to update after 3 retries.
Change bxe_panic() ECORE_DBG_BREAK_IF() ECORE_BUG() ECORE_BUG_ON() to
panic only if ECORE_STOP_ON_ERROR is defined.
Approved by: re(gjb)
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When anouncing link state changes on an 802.11 interface with a vap,
announce the change on the vap's ifnet instead of the main ifnet. This
matches the behavior of other wireless drivers in the tree and allows the
default devd configuration to correctly start dhclient automatically after
an ndis wireless device associates.
Approved by: re (marius for 10)
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This device reports RAID subclass, but appears to be AHCI compatible.
Submitted by: Yuri Perejilin <yuri@rivera.ru>
Approved by: re (gjb)
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Use the right constants in comparisons. This is currently a nop, as
MIN_RXD == MIN_TXD and MAX_RXD == MAX_TXD.
Reviewed by: Eric Joyner @ Intel
Approved by: re (kib)
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Current busdma code for unmapped bios will not properly align the
segment size, causing corruption on blkfront devices. Revert the commit
until busdma code is fixed.
Reported by: mav
Approved by: re
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Invert AHCI_Q_NOBSYRES quirk meaning, waiting for readiness by default.
I gave up to update list of Marvell chips that require this quirk.
The final nail was growing number of PCIe/M.2 SSDs where Marvell
chips have PCI IDs of different vendors.
Approved by: re (delphij)
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Update mixer description for FastTrackPro.
Approved by: re, marius
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Add new quirk.
PR: 193279
Approved by: re, marius
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Fix logical error.
Approved by: re, glebius
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r270973
Fix for WITNESS warning while doing xpt_rescan.
This happen when converting any JBOD to RAID or creating
any new RAID from Unconfigured Drives.
Without this fix, user may see call trace if WITNESS is enabled.
System may panic when reconfiguring the RAID.
Reviewed by: ambrisko
Approved by: re (gleb)
---
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Add support for SOUND_MIXER_INFO IOCTL, used by gstreamer.
Submitted by: Dmitry Luhtionov <dmitryluhtionov@gmail.com>
Approved by: re (marius)
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These are largely dumbbell@'s changes. Most significantly they address
the extreme performance degradation with VGA hardware.
SVN revisions in this MFC:
269471 270290 270293 270322 270324 270329 270331 270336 270338 270340
270341 270342 270343 270388 270390 270404 270411 270412 270413 270431
270446 270448 270485 270587 270589 270613 270618 270620 270667 270702
270707 270708 270720 270721 270785 270786
Detailed commit list:
r270290: Test if the cursor is shown only once
Later, we just see if the "struct mouse_cursor" pointer is set. This
avoids the need to mess with all the conditions several times; this
has been error prone.
While here, rename the variable "m" to a more meaningful "cursor",
like it's done elsewhere in the code.
r270293: Rename the "mouse_cursor" structure to "vt_mouse_cursor"
At the same time, "w" and "h" members are now called "width" and
"height". The goal is to have a more "public" structure, because it
will soon be passed as argument to a new callback, replacing
vd_bitbltchr_t.
r269471 (ray):
Fix vt_vga driver to draw not-8-bit-aligned fonts correctly.
Still one bug here: mouse left some gaps on track when moving left.
r270322:
Add new vd_bitblt_text_t callback, and implement it for vt_vga
Compared to the deprecated vd_bitbltchr_t callback, vd_bitblt_text_t
receives:
o the whole text buffer
o the dirty area
o the mouse cursor (map, position, colors)
This allows the backend to perform optimization on how to draw things.
The goal is to remove vd_bitbltchr_t and vd_putchar_t, once all driver
are converted (only vt_vga is included in this commit).
In vt_vga, this allows to draw the text and the cursor in one pass,
without ever reading from video memory (because it has all the context).
The main benefit is the speed improvement: no more slideshow during
boot!
Other bugs fixed in vt_vga are:
o left-most characters are drawn properly (the left-most pixels were
missing with bold characters and some wide letters such as 'm')
o no more black square around the cursor
o no cursor flickering when the text is scrolling
There are still many problems to fix: the known issues are marked with
"FIXME" inside the code.
r270411:
vt_fb: Implement vd_bitblt_text_t for vt_fb and derivatives
r270412:
creator_fb: Implement vd_bitblt_text_t
r270413: ofwfb: Implement vd_bitblt_text_t
r270324: vt_vga: Clip the draw area to never draw offscreen
This fixes a bug when two windows use different fonts, but a longer-
term solution is required. The dirty area should be stored as pixels,
not character cells, because such coordinates don't have the same
meaning in all windows, when using different fonts.
r270329: Mark new mouse position as dirty only when it's actually displayed
r270331: Store cursor bitmap & colors in struct vt_device
This removes the need to specify them to each call to vd_bitblt_text_t
and, therefore, simplifies the API.
r270336: Give the window to vd_bitblt_text_t callback
... instead of both the buffer and the font. Again, this simplifies
the API.
r270338: The offset to center the text area is per-window now
The previous global offset, based on the last loaded font, had no
meaning for other windows. This caused a shifted text area, often
partly out-of-screen.
r270341: vt_vga: Remove a "FIXME" comment; the issue was solved in r270338
r270340: Don't run vt_set_border() and vt_flush() concurrently
In the case of vt_vga, the two concurrent calls were writing to the
same VGA registers, causing incorrect refresh of the screen.
r270342: Use the actual size of the mouse when marking its position as dirty
This fixes a bug where part of the cursor was not erased.
r270343: Remove "FIXME" about multiple locking of vt_buf in vt_flush()
After some testing, it appears that acquiring the lock once and keeping
it longer is slower than taking it multiple times.
While here, fix a typo in another comment.
r270388: vt_vga: Give only the character part of term_char_t to vga_get_cp437()
This fixes a bug where vga_get_cp437() was called with an invalid
argument. The screen was then filled with '?' instead of the actual
character.
r270390: Fix a crash in vt_mark_mouse_position_as_dirty() when in textmode
In textmode, no font is loaded, thus the page fault in
vt_mark_mouse_position_as_dirty() when it wants the font width/height.
For now, create a fake area for the textmode. This needs to be
modified if vt_vga gains mouse support in textmode.
While here, fix a build failure when SC_NO_CUTPASTE is defined:
vt_mark_mouse_position_as_dirty() must not be included in this case.
r270404: Fix cursor handling in vt_flush()
There were situations where the cursor was not erased/redrawn or its
position was marked as dirty even though it's not displayed. The code
is now more straightforward.
At the same, add a function to determine if the cursor covers a given
area. This is used by backends to know if they need to draw the
cursor.
This new function should be paired with a new state in struct
vt_device, called vd_mshown, which indicates if the cursor should be
displayed. This again simplifies vd_bitblt_text_t callback's API.
r270431: vt(4): Add vd_bitblt_bmp_t callback
The code was already there in all backends, we just expose it. This is
used to display the splash screen.
r270446: Remove vd_bitbltchr_t
It's replaced by vd_bitblt_text_t, which gives more context to the
backend and allows it to perform more efficiently when redrawing a
given area.
r270448: Fix order of arguments (x <-> y) when showing the splash screen
r270485: vt_vga: Fix the display of the splash screen
r270587: Take font offset into account in vt_is_cursor_in_area()
This fixes a "General protection fault" in vt_vga, where
vt_is_cursor_in_area() erroneously reported that the cursor was over
the text. This led to negative integers stored in "unsigned int" and
chaos.
r270589: The cursor coordinates are relative to the drawn area
... not the whole screen. Don't use font offsets in
vt_mark_mouse_position_as_dirty().
This fixes a bug where the mouse position wasn't marked as dirty when
approaching the borders of the drawn area.
r270613: Store a rectangle for the drawable area, not just the top-left corner
This allows backends to verify they do not draw outside of this area.
This fixes a bug in vt_vga where the text was happily drawn over the
right and bottom margins, when using the Gallant font.
r270618: Intialize drawable area rectangle each time a font is loaded
This also fixes a problem where early in boot, the area was zero,
leading to nothing displayed for a few seconds.
r270620: vt_vga: Use Write Mode 0 to draw group of 8 pixels using 3 or more colors
This replaces the method based on Write Mode 3, which required reads
from the video memory to load the latches.
r270667: When creating a window buffer, fill it entirely
... not just the visible part.
This fixes a bug where, when switching from eg. vt_vga to vt_fb (ie.
the resolution goes up), the originally hidden, uninitialized area of
the buffer is displayed on the screen. This leads to a missing text
cursor when it's over an unitialized area.
This was also visible when selecting text: the uninitialized area was
not highlighted.
Internally, this area was zeroed: characters were all 0x00000000,
meaning the foreground and background color was black. Now, everything
is filled with a space with a gray foreground color, like the visible
area.
While here, remove the check for the mute flag and always use
TERMINAL_NORM_ATTR as the character attribute (ie. gray foreground,
black background).
r270702: Implement basic support for KDSETMODE ioctl
With the current implementation, this allows an X11 server to tell
the console it switches a particular window in "graphics mode". This
information is used by the mouse handling code to ignore sysmouse events
in the window taken by the X server: only him should receive those
events.
r270707: Pause the vt_flush() timer when the screen is up-to-date
The timer is restarted whenever a window buffer is marked as dirty or
the mouse cursor moves.
There's still room for improvement. For instance, we should not mark a
window buffer as dirty when this window isn't displayed.
r270708: vt(4): Recompute the drawable area when the resolution changes
This was only done when the font changed.
r270720: vt(4): Fix mouse cursor handling in vt_fb/creator_vt/ofwfb
There were two issues:
1. The area given to vt_is_cursor_in_area() was adding the drawable
area offset, something already handled by this function.
2. The cursor was shifted on the screen by the offset of this area
and thus was misplaced or not erased. Furthermore, when reaching
the bottom or right borders, the cursor was either totally
removed or not erased correctly.
r270721: vt(4): If the terminal shrinks, make sure the mouse is inside
the new area
r270785: vt(4): Change vb_history_size from "int" to "unsigned int"
CID: 1230002, 1230003
r270786: Indicate that KDSETRAD case falls through the next case
CID: 1229953
Relnotes: Yes
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- Update the OFED Linux Emulation layer as a preparation for a
hardware driver update from Mellanox Technologies.
- Remove empty files from the OFED Linux Emulation layer.
- Fix compile warnings related to printf() and the "%lld" and "%llx"
format specifiers.
- Add some missing 2-clause BSD copyrights.
- Add "Mellanox Technologies, Ltd." to list of copyright holders.
- Add some new compatibility files.
- Fix order of uninit in the mlx4ib module to avoid crash at unload
using the new module_exit_order() function.
Sponsored by: Mellanox Technologies
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The goal is to clear the video memory, in case an application drew to
it. So the content shouldn't be loaded in the latches, it can't be
trusted anyway.
This improves a bit the window switch speed.
Sponsored by: The FreeBSD Foundation
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The same functionality can be obtained by testing for mask != NULL in
vd_bitbltchr, which all implementations of vd_bitbltchr() were doing
anyway.
Sponsored by: The FreeBSD Foundation
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Set fb_pbase properly on PowerPC in the case where we have to guess at
the right register bank for the framebuffer. Disable the assigned-
addresses path on SPARC since it is just a hack for IBM PPC systems
and was neither relevant for nor worked on SPARC anyway.
Sponsored by: The FreeBSD Foundation
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r268472 (ray):
Should check fb_read method presence instead of double check for fb_write.
r269620 (nwhitehorn):
Retire various intertwined bits of fbd(4) and vt_fb, in particular the
pixel modification indirection. No actual drivers use it and those
that might (e.g. creatorfb) use custom implementations of
vd_bitbltchr().
Relnotes: No
Sponsored by: The FreeBSD Foundation
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Make mmap() of the console device when using ofwfb work like other
supported framebuffer drivers. This lets ofwfb work with
xf86-video-scfb and makes the driver much more generic and less
PCI-centric. This changes some user-visible behavior and will require
updates to the xorg-server port on PowerPC when using ATI graphics
cards.
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
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