972 Commits

Author SHA1 Message Date
Sven Schnelle
31bc23241b s390/raw3270: fix nullpointer check
Fix the following checkpatch warning:

CHECK: Comparison to NULL could be written "!rp"
+       if (rp == NULL)

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:04 +01:00
Sven Schnelle
420105f450 s390/raw3270: split up raw3270_activate_view()
move the core processing to __raw3270_activate_view() to
reduce the required if/else blocks and indentiion levels.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:04 +01:00
Sven Schnelle
7aeeeb926c s390/raw3270: remove BUG_ON in raw3270_request_reset()
WARN_ON_ONCE if list is not empty, and return an error code
instead.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:04 +01:00
Sven Schnelle
82df96d849 s390/raw3270: use DEVICE_ATTR_RO() for sysfs attributes
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:03 +01:00
Sven Schnelle
fd2a41d07b s390/raw3270: add comment to spinlock member
Add a small comment to the lock member of struct raw3270_view
to make checkpatch happy.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:03 +01:00
Sven Schnelle
0d85d8edaf s390/raw3270: fix raw3270 declarations
checkpatch complains about missing argument names in function
declarations. Fix it.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:03 +01:00
Sven Schnelle
ff61744c97 s390/raw3270: fix indentation/whitespace errors
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:03 +01:00
Sven Schnelle
754f66b59c s390/raw3270: move EXPORT_SYMBOL() next to functions
Fixes a few checkpatch warning about EXPORT_SYMBOL being
at the end of the file instead of being next to the
functions.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:03 +01:00
Sven Schnelle
7ef213879a s390/con3270: fix minor checkpatch issues
Fix remaining checkpatch issues, like misplaced brackets,
whitespace and similar things. No functional change.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
9e1d1d8e76 s390/con3270: use msecs_to_jiffies()
Use msecs_to_jiffies() instead of HZ/10.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
f867493089 s390/con3270: fix multiple assignments in one line
fix the following and similar checkpatch warnings:

CHECK: multiple assignments should be avoided
+		       tp->cx = tp->saved_cx = 0;

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
303bac9df7 s390/con3270: fix camelcase in enum members
fix the following and similar checkpatch warnings:

CHECK: Avoid CamelCase: <ESnormal>
+       enum { ESnormal, ESesc, ESsquare, ESparen, ESgetpars };

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
525c919d5e s390/con3270: add key help to status area
To let the user know about function key bindings, print
them next to the Running/History field at the lower right
of the screen. Also print the scrollback position.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
0573fff205 s390/con3270: reduce highlight width to 3 bits
With the previous change this reduces the size of struct tty3270_attribute
from four to two bytes. As we have this struct allocated for each character
cell, this saves quite some memory.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:02 +01:00
Sven Schnelle
18fc2e93b6 s390/con3270: reduce f_color and b_color attribute size to 4 bit
As we're only supportign 8 colors, we don't need 8 bits. Reduce the
size to 4 bits to save memory.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:01 +01:00
Sven Schnelle
7648507870 s390/con3270: rewrite command line recalling
Command line recalling is the last user of the 3270 custom malloc()
like allocator. Remove this dependency by using a statically allocated
buffer for the saved command lines, and also remove the allocator.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:01 +01:00
Sven Schnelle
164eb66934 s390/tty3270: use normal char buffer for prompt/input
Preparation patch to allow removing the custom 3270 memory allocator.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:01 +01:00
Sven Schnelle
9c138af9b7 s390/tty3270: convert lines during output
The length of the screen line is variable with the 3270 protocol.
For each attribute (foreground, background color, highlighting etc)
we need 3 bytes: the set attribute order, the attribute number, and
the value of the attribute. This means that depending on screen content,
we might end up 3*3 bytes addtional data for a single character.

Allocating the maximum possible amount of memory is quite a lot, and
we cannot easily extend the lines by allocating memory because we
might get called from atomic context. Failing to extend the memory
would also be bad as that would mean that we could miss kernel messages
in oom conditions. Therefore move the conversion to a 3270 datastream
to tty3270_update(), and use only single line buffer.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:01 +01:00
Sven Schnelle
ec1b0a33a3 s390/con3270: generate status line during output
Updating the status line is almost the same as generating
it when redrawing the screen. However, the code is much easier
to read when doing so.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:01 +01:00
Sven Schnelle
ae6572445b s390/tty3270: add 3270 datastream helpers
There are lots of places adding attributes or orders to the datastream.
Add a few helpers to make that code shorter and easier to read.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:00 +01:00
Sven Schnelle
6e49017ce4 s390/tty3270: move ASCII->EBCDIC conversion to convert_line()
Instead of always converting the character set, only convert them
when the line is really displayed.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:00 +01:00
Sven Schnelle
2b62ba58b3 s390/con3270: move tty3270_convert_line()
To make the upcoming patches easier to read, move tty3270_convert_line()
before changing code. No functional change.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:00 +01:00
Sven Schnelle
f77f936afe s390/raw3270: make raw3270_buffer_address() accept x/y coordinates
All callers of raw3270_buffer_address() are calculating the offset
from some x/y coordinates. Move that calculation inside of the
function, so user can pass the x/y values directly. Note that
negative values are relative to the end-of-line or end-of-screen.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:00 +01:00
Sven Schnelle
b2057c8702 s390/tty3270: allocate screen with scrollback
No functional change (except more memory consumption), in preparation
for the line buffer rework.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:34:00 +01:00
Sven Schnelle
9eb99b941b s390/con3270: add helper to get number of tty rows
There a quite a few places using 'tp->view.rows - 2'.
Add a helper function for this. This will also be used
when a function key help line will be added.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
1fefd62fee s390/tty3270: split up tty3270_convert_line()
To make the code easier to read, split up tty3270_convertline()
into several subfunctions:

- tty3270_resize_line() to realloc the line if it doesn't have enough
  space left
- tty3270_required_length() to calculate how much space we need
- tty3270_add_attributes() to add the color and highlight attributes
- tty3270_add_reset_attributes() to reset the attributes at the end of
  the line

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
cbb36313bd s390/tty3270: resize terminal when the clear key is pressed
There's no easy way to figure out whether the user has re-connected
to the z/VM session. When the user re-connected with a different geometry
to z/VM, the screen layout is broken. Allow the user to force a resizing
by pressing the Clear Key.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
91621ba7d7 s390/tty3270: move resize work to raw3270
This change was initially made to reduce code duplication when the
con3270 and tty3270 shared the same resize code. It still makes sense
to move the resize workqueue to raw3270 in case we add some other view
later.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
f08e31558a s390/raw3270: add raw3270_start_request() helper
There are a few places (and there would be more with the following commits)
like this:

raw3270_request_reset(cp->kreset);
raw3270_request_set_cmd(cp->kreset, TC_WRITE);
raw3270_request_add_data(cp->kreset, &kreset_data, 1);
raw3270_start(&cp->view, cp->kreset);

i.e reset a request, setting the command, adding payload, and starting the
request. Add a helper raw3270_start_request() which takes a command and
the payload as argument and calls the approppriate functions.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
e22de7d791 s390/tty3270: add AID defines
Use AID_* instead of hex numbers to make the code a bit
easier to read. also convert the if/else blocks to a
switch statement in tty3270_read_tasklet().

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:59 +01:00
Sven Schnelle
970cf9a97a s390/tty3270: ignore NUL characters
With 'TERM=vt220' zsh is sending several NUL characters with
the prompt to the tty. Both xterm and the linux drm console
seem to ignore them. Ignore them in tty3270 as well.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:58 +01:00
Sven Schnelle
e4b57b9393 s390/tty3270: add support for VT100 graphics escape
Add support for ESC(B and ESC(0 to switch between character charset
and graphics charset. Used in vt100 and later terminal generations.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:58 +01:00
Sven Schnelle
94dbb0a76c s390/tty3270: add support for graphic escape
Add support for ASCII S0/S1 to switch between character
charset and graphic charset.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:58 +01:00
Sven Schnelle
4043ea2253 s390/tty3270: add support for background color
3270 terminals support 8 background colors. Add the code to utilize
them. Unfortunately the line erase code need to be adjusted: Without
background colors, it was sufficient to just set the line length to
zero. With background colors, we need to put spaces with the correct
background color.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:58 +01:00
Sven Schnelle
c2e9375ecd s390/tty3270: add struct tty3270_attribute
In preparation of background color and graphic escape support add
a structure for attributes can be copied at once.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:58 +01:00
Sven Schnelle
562baff577 s390/raw3270: use __packed instead of __attribute__((packed))
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:57 +01:00
Sven Schnelle
65b77ccb1e s390/tty3270: use switch/case in tty3270_erase_display()
This makes the code easier to read.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:57 +01:00
Sven Schnelle
815f3eeea9 s390/tty3270: use switch/case in tty3270_erase_line()
This makes the code easier to read.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:57 +01:00
Sven Schnelle
13d4999ab2 s390/raw3270: fix formatting issues
fix function prototypes split over two lines like:

static void
foobar(void)

and fix superfluous spaces in declarations like

foo * bar

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:57 +01:00
Sven Schnelle
e6d98bb823 s390/con3270: fix formatting issues
fix function prototypes split over two lines like:

static void
foobar(void)

and fix superfluous spaces in declarations like

foo * bar

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:57 +01:00
Sven Schnelle
fbaee7464f s390/tty3270: add support for diag 8c
The current code uses diag210 to infer the 3270 geometry from the
model number when running on z/VM. This doesn't work well as almost
all 3270 software clients report as 3279-2 with a custom resolution.
tty3270 assumes it has a 80x24 terminal connected because of the -2
suffix. Use diag 8c to fetch the realy geometry from z/VM.

Note that this doesn't allow dynamic resizing, i.e. reconnecting to
a z/VM session with a different geometry.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:56 +01:00
Sven Schnelle
9603cb334a s390/tty3270: rename to con3270
Rename the driver file to con3270 to be in sync with con3215.c.
This removes CONFIG_TN3270_TTY, it is now always build if CONFIG_TN3270
is enabled.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:56 +01:00
Sven Schnelle
c17fe081ac s390/3270: unify con3270 + tty3270
There were two flavours of 3270 drivers: con3270, which provides a
console driver, and tty3270 providing a tty driver. A user could switch
with PF3 between the two views. While this sounds nice, it's a bit
annoying: If the user enters a command which triggers a kernel message,
he always has to switch back and forth to see the message. Unify both
views to have kernel messages and tty in one screen, like it is on almost
all other platforms. This also has the nice side effect of removing a lot
of duplicate code.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:56 +01:00
Sven Schnelle
a21e962e12 s390/tty3270: add tty3270_create_view()
Will be used later for the console driver.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-01-09 14:33:56 +01:00
Linus Torvalds
71a7507afb Driver Core changes for 6.2-rc1
Here is the set of driver core and kernfs changes for 6.2-rc1.
 
 The "big" change in here is the addition of a new macro,
 container_of_const() that will preserve the "const-ness" of a pointer
 passed into it.
 
 The "problem" of the current container_of() macro is that if you pass in
 a "const *", out of it can comes a non-const pointer unless you
 specifically ask for it.  For many usages, we want to preserve the
 "const" attribute by using the same call.  For a specific example, this
 series changes the kobj_to_dev() macro to use it, allowing it to be used
 no matter what the const value is.  This prevents every subsystem from
 having to declare 2 different individual macros (i.e.
 kobj_const_to_dev() and kobj_to_dev()) and having the compiler enforce
 the const value at build time, which having 2 macros would not do
 either.
 
 The driver for all of this have been discussions with the Rust kernel
 developers as to how to properly mark driver core, and kobject, objects
 as being "non-mutable".  The changes to the kobject and driver core in
 this pull request are the result of that, as there are lots of paths
 where kobjects and device pointers are not modified at all, so marking
 them as "const" allows the compiler to enforce this.
 
 So, a nice side affect of the Rust development effort has been already
 to clean up the driver core code to be more obvious about object rules.
 
 All of this has been bike-shedded in quite a lot of detail on lkml with
 different names and implementations resulting in the tiny version we
 have in here, much better than my original proposal.  Lots of subsystem
 maintainers have acked the changes as well.
 
 Other than this change, included in here are smaller stuff like:
   - kernfs fixes and updates to handle lock contention better
   - vmlinux.lds.h fixes and updates
   - sysfs and debugfs documentation updates
   - device property updates
 
 All of these have been in the linux-next tree for quite a while with no
 problems, OTHER than some merge issues with other trees that should be
 obvious when you hit them (block tree deletes a driver that this tree
 modifies, iommufd tree modifies code that this tree also touches).  If
 there are merge problems with these trees, please let me know.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the set of driver core and kernfs changes for 6.2-rc1.

  The "big" change in here is the addition of a new macro,
  container_of_const() that will preserve the "const-ness" of a pointer
  passed into it.

  The "problem" of the current container_of() macro is that if you pass
  in a "const *", out of it can comes a non-const pointer unless you
  specifically ask for it. For many usages, we want to preserve the
  "const" attribute by using the same call. For a specific example, this
  series changes the kobj_to_dev() macro to use it, allowing it to be
  used no matter what the const value is. This prevents every subsystem
  from having to declare 2 different individual macros (i.e.
  kobj_const_to_dev() and kobj_to_dev()) and having the compiler enforce
  the const value at build time, which having 2 macros would not do
  either.

  The driver for all of this have been discussions with the Rust kernel
  developers as to how to properly mark driver core, and kobject,
  objects as being "non-mutable". The changes to the kobject and driver
  core in this pull request are the result of that, as there are lots of
  paths where kobjects and device pointers are not modified at all, so
  marking them as "const" allows the compiler to enforce this.

  So, a nice side affect of the Rust development effort has been already
  to clean up the driver core code to be more obvious about object
  rules.

  All of this has been bike-shedded in quite a lot of detail on lkml
  with different names and implementations resulting in the tiny version
  we have in here, much better than my original proposal. Lots of
  subsystem maintainers have acked the changes as well.

  Other than this change, included in here are smaller stuff like:

   - kernfs fixes and updates to handle lock contention better

   - vmlinux.lds.h fixes and updates

   - sysfs and debugfs documentation updates

   - device property updates

  All of these have been in the linux-next tree for quite a while with
  no problems"

* tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (58 commits)
  device property: Fix documentation for fwnode_get_next_parent()
  firmware_loader: fix up to_fw_sysfs() to preserve const
  usb.h: take advantage of container_of_const()
  device.h: move kobj_to_dev() to use container_of_const()
  container_of: add container_of_const() that preserves const-ness of the pointer
  driver core: fix up missed drivers/s390/char/hmcdrv_dev.c class.devnode() conversion.
  driver core: fix up missed scsi/cxlflash class.devnode() conversion.
  driver core: fix up some missing class.devnode() conversions.
  driver core: make struct class.devnode() take a const *
  driver core: make struct class.dev_uevent() take a const *
  cacheinfo: Remove of_node_put() for fw_token
  device property: Add a blank line in Kconfig of tests
  device property: Rename goto label to be more precise
  device property: Move PROPERTY_ENTRY_BOOL() a bit down
  device property: Get rid of __PROPERTY_ENTRY_ARRAY_EL*SIZE*()
  kernfs: fix all kernel-doc warnings and multiple typos
  driver core: pass a const * into of_device_uevent()
  kobject: kset_uevent_ops: make name() callback take a const *
  kobject: kset_uevent_ops: make filter() callback take a const *
  kobject: make kobject_namespace take a const *
  ...
2022-12-16 03:54:54 -08:00
Linus Torvalds
75f4d9af8b iov_iter work; most of that is about getting rid of
direction misannotations and (hopefully) preventing
 more of the same for the future.
 
 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull iov_iter updates from Al Viro:
 "iov_iter work; most of that is about getting rid of direction
  misannotations and (hopefully) preventing more of the same for the
  future"

* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  use less confusing names for iov_iter direction initializers
  iov_iter: saner checks for attempt to copy to/from iterator
  [xen] fix "direction" argument of iov_iter_kvec()
  [vhost] fix 'direction' argument of iov_iter_{init,bvec}()
  [target] fix iov_iter_bvec() "direction" argument
  [s390] memcpy_real(): WRITE is "data source", not destination...
  [s390] zcore: WRITE is "data source", not destination...
  [infiniband] READ is "data destination", not source...
  [fsi] WRITE is "data source", not destination...
  [s390] copy_oldmem_kernel() - WRITE is "data source", not destination
  csum_and_copy_to_iter(): handle ITER_DISCARD
  get rid of unlikely() on page_copy_sane() calls
2022-12-12 18:29:54 -08:00
Heiko Carstens
b64d7254ff s390/sclp: introduce sclp_emergency_printk()
Introduce sclp_emergency_printk() which can be used to emit a message
in emergency cases. sclp_emergency_printk() is only supposed to be
used in cases where it can be assumed that regular console device
drivers may not work anymore.
For example this may be the case for unrecoverable machine checks.

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2022-12-06 16:18:24 +01:00
Heiko Carstens
a4c41fe398 s390/sclp: keep sclp_early_sccb
Keep sclp_early_sccb so it can also be used after initdata has been
freed. This is a prerequisite to allow printing a message from the
machine check handler.

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2022-12-06 16:18:24 +01:00
Sven Schnelle
e2d2a2968f s390/ipl: add eckd dump support
This adds support to use ECKD disks as dump device
to linux. The new dump type is called 'eckd_dump', parameters
are the same as for eckd ipl.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2022-12-06 16:18:22 +01:00
Sven Schnelle
87fd22e0ae s390/ipl: add eckd support
This adds support to IPL from ECKD DASDs to linux.
It introduces a few sysfs files in /sys/firmware/reipl/eckd:

bootprog: the boot program selector
clear:    whether to issue a diag308 LOAD_NORMAL or LOAD_CLEAR
device:   the device to ipl from
br_chr:   Cylinder/Head/Record number to read the bootrecord from.
          Might be '0' or 'auto' if it should be read from the
	  volume label.
scpdata:  data to be passed to the ipl'd program.

The new ipl type is called 'eckd'.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2022-12-06 16:18:21 +01:00