Commit graph

698 commits

Author SHA1 Message Date
cinap_lenrek e4b5f170cf libc: change usize to 64-bit for amd64 and arm64, make memory(2) functions use usize 2021-07-25 15:54:22 +00:00
cinap_lenrek c3589ef3cf kernel: export pcienumcaps() for custom capability enumeration in drivers (virtio)
This used to be a internal function, but virtio
uses multiple structures with the same cap type
to indicate the location of various register
blocks in the pci bars so export it.
2021-07-10 18:34:22 +00:00
cinap_lenrek c848ca6267 devmouse: default to no blanking instead of 30 minute blank timeout 2021-07-01 23:11:11 +00:00
cinap_lenrek c2297ce5c1 kernel: use 64-bit virtual entry point for expanded header, document behaviour in a.out(6)
For 64-bit architectures, the a.out header has the HDR_MAGIC flag set
in the magic and is expanded by 8 bytes containing the 64-bit virtual
address of the programs entry point. While Exec.entry contains physical
address for kernel images.

Our sysexec() would always use Exec.entry, even for 64-bit a.out binaries,
which worked because PADDR(entry) == entry for userspace pointers.

This change fixes it, having the kernel use the 64-bit entry point
and document the behaviour in the manpage.
2021-05-29 14:18:35 +02:00
cinap_lenrek c0d4498ab8 kernel: clean up Mach structure
Remove unused fields and factor common fields into a
new PMach struct in port/portdat.h.

The fields machno, splpc and proc are not moved to
PMach as they are part of the known offsets from
assembly (l.s).
2021-04-25 17:41:34 +02:00
cinap_lenrek 52a367f3ea devloopback: fix wrong device character (thanks romano)
devloopback was changed from using #X to #λ awhile ago; one bit was missed.
2021-04-18 16:20:04 +02:00
cinap_lenrek 295acd7e0d kernel: get rid of physical page bank array and use conf.mem[] instead
We can take advantage of the fact that xinit() allocates
kernel memory from conf.mem[] banks always at the beginning
of a bank, so the separate palloc.mem[] array can be eleminated
as we can calculate the amount of non-kernel memory like:

upages = cm->npage - (PGROUND(cm->klimit - cm->kbase)/BY2PG)

for the number of reserved kernel pages,
we provide the new function: ulong nkpages(Confmem*)

This eleminates the error case of running out of slots in
the array and avoids wasting memory in ports that have simple
memory configurations (compared to pc/pc64).
2021-04-02 20:23:25 +02:00
cinap_lenrek a2ebe5c79a devfs: fix locking and ignore undocumented "fsdev:\n" configuration signature
The confstr was shared between readers so seprintconf() could
write concurrently to that buffer which is not safe.

This replaces the shared static confstr[Maxconf] buffer with a
pointer that is initially nil and a buffer that is alloced on
demand.

The new confstr pointer (and buffer) is now only updated while
wlock()ed from the new setconfstr() function.

This is now done by mconfig() / mdelctl() just before releasing
the wlock.

Now, rdconf() will check if confstr has been initialized, and
test for it again while wlock()ed; making sure the configuration
is read only once.

Also, rdconf() used to check for a undocumented "fsdev:\n" string
at the beginning of config data tho that was never documented.

This changes mconfig() to ignore that particular signature so
the example from the manpage will work as documented.
2021-03-31 17:49:10 +02:00
cinap_lenrek 3841a46421 kernel: remove ucalloc.c duplicates 2021-03-13 14:57:53 +01:00
cinap_lenrek 7c62c12701 kernel: use 64-bit mask to avoid compiler warning in port/pci.c 2021-03-13 14:20:00 +01:00
cinap_lenrek a0404ff582 devpccard, pci: fix pccard support and handle pci expansion roms
let pci.c deal with the special cardbus controller bar0 and
expansion roms.

handle apic interrupt routing for devices behind a cardbus slot.

do not free the pcidev on card removal, as the drivers
most certanly are not prepared to handle this yet.
instead, we provide a pcidevfree() function that just unlinks
the device from pcilist and the parent bridge.
2021-03-01 17:24:54 +01:00
cinap_lenrek 999e98b9b8 usbehci: use 64-bit base address, remove resetlck, simplify scanpci() 2021-01-17 11:55:39 +01:00
cinap_lenrek ab103ba349 devproc: allow anyone to change user of its own processes to "none" 2020-12-23 13:09:31 +01:00
cinap_lenrek 29f60cace1 kernel: avoid palloc lock during mmurelease()
Previously, mmurelease() was always called with
palloc spinlock held.

This is unneccesary for some mmurelease()
implementations as they wont release pages
to the palloc pool.

This change removes pagechainhead() and
pagechaindone() and replaces them with just
freepages() call, which aquires the palloc
lock internally as needed.

freepages() avoids holding the palloc lock
while walking the linked list of pages,
avoding some lock contention.
2020-12-22 16:29:55 +01:00
cinap_lenrek 0ad4ceb8d0 kernel: make addbroken() static, remove misleading Proc* argument 2020-12-21 22:03:46 +01:00
cinap_lenrek e4ce6aadac kernel: handle tos and per process pcycle counters in port/
we might as well handle the per process cycle
counter in the portable part instead of duplicating the code
in every arch and have inconsistent implementations.

we now have a portable kenter() and kexit() function,
that is ment to be used in trap/syscall from user,
which updates the counters.

some kernels missed initializing Mach.cyclefreq.
2020-12-20 22:34:41 +01:00
cinap_lenrek 58e6750401 kernel: remove Proc* argument from procsetuser() function 2020-12-19 18:07:12 +01:00
cinap_lenrek d919ad3b5e devsons: remove #c/pgrpid
The process group id is essentially a unique id
of the namespace but it was never well documented
nor is it used by any program.
2020-12-19 14:59:19 +01:00
cinap_lenrek 0b33b3b8ad kernel: implement per file descriptor OCEXEC flag, reject ORCLOSE when opening /fd, /srv and /shr
The OCEXEC flag used to be maintained per channel,
making it shared between all the file desciptors.

This has a unexpected side effects with regard to
channel passing drivers such as devdup (/fd),
devsrv (/srv) and devshr (/shr).

For example, opening a /srv file with OCEXEC
makes it impossible to be remounted by exportfs
as it internally does a exec() to mount and
re-export it. There is no way to reset the flag.

This change makes the OCEXEC flag per file descriptor,
so a open with the OCEXEC flag only affects the fd
group of the calling process, and not the channel
itself.

On rfork(RFFDG), the per file descriptor flags get
copied.

On dup(), the per file descriptor flags are reset.

The second modification is that /fd, /srv and /shr
should reject the ORCLOSE flag, as the files that
are returned have already been opend.
2020-12-13 16:04:09 +01:00
Sigrid 3d9abd96ae devmouse: remove redundant check 2020-12-08 11:21:18 +01:00
cinap_lenrek 1376d39ef1 kernel: add portable pcimsienable()/pcimsidisable(), disable MSI/MSI-X on pcidisable()/pcireset()
This avoids some duplication in the pci support code and
allows pcireset() to diable MSI and MSI-X interrupts
when disabling or reseting a device.
2020-11-21 16:02:21 +01:00
cinap_lenrek da54e4bfc2 kernel: remove unused pcinextcap() function 2020-11-21 00:41:57 +01:00
cinap_lenrek 0ba91ae22a pc, pc64: allocate i/o port space for unassigned pci bars, move ioalloc() to port/iomap.c
With some newer UEFI firmware, not all pci bars get
programmed and we have to assign them ourselfs.

This was already done for memory bars. This change
adds the same for i/o port space, by providing a
ioreservewin() function which can be used to allocate
port space within the parent pci-pci bridge window.

Also, the pci code now allocates the pci config
space i/o ports 0xCF8/0xCFC so userspace needs to
use devpnp to access pci config space now. (see
latest realemu change).

Also, this moves the ioalloc()/iofree() code out
of devarch into port/iomap.c as it can be shared
with the ppc mtx kernel.
2020-11-03 20:46:09 +01:00
cinap_lenrek c7598b18f3 kernel: get rid of unused ucallocb
the whole idea of a ucallocb() is bad, as even access to the
metadata header would be in uncached memory. also, it tuns out
that it was never used by anyone.
2020-10-09 22:05:32 +02:00
cinap_lenrek 4f85115526 kernel: massive pci code rewrite
The new pci code is moved to port/pci.[hc] and shared by
all ports.

Each port has its own PCI controller implementation,
providing the pcicfgrw*() functions for low level pci
config space access. The locking for pcicfgrw*() is now
done by the caller (only port/pci.c).

Device drivers now need to include "../port/pci.h" in
addition to "io.h".

The new code now checks bridge windows and membars,
while enumerating the bus, giving the pc driver a chance
to re-assign them. This is needed because some UEFI
implementations fail to assign the bars for some devices,
so we need to do it outselfs. (See pcireservemem()).

While working on this, it was discovered that the pci
code assimed the smallest I/O bar size is 16 (pcibarsize()),
which is wrong. I/O bars can be as small as 4 bytes.
Bit 1 in an I/O bar is also reserved and should be masked off,
making the port mask: port = bar & ~3;
2020-09-13 20:33:17 +02:00
cinap_lenrek a87b6909bc wifi: add packet timestamping support 2020-09-06 16:51:02 +02:00
cinap_lenrek 603d9812a7 kernel: fix Abind cyclic reference and mounthead leaks (thanks Alex Musolino)
The Abind case in namec() needs to cunique() the chan
before attaching the umh mount head pointer onto it.

This is because we cannot give a reference to the mount
head to any of the mh->mount...->to channels, as they
will never go away until the mount head goes away.
This is a cyclic reference.

This could be reproduced with:

	@{rfork n; mount -a '#s/boot' /mnt/root; bind /mnt/root /}

Also, fix memory leaks around cunique(), which can
error, leaking the mount head we got from domount().

Move the umh != nil check inside cunique().
2020-08-23 05:07:30 +02:00
cinap_lenrek d913f652f5 devmnt: print chanpath for unexpected reply tag 2020-08-04 16:23:22 +02:00
cinap_lenrek 77ddc8c654 kernel: make segments non-executable when icache is not maintained
This change makes it mandatory for programs to call segflush() on
code that is not in the text segment if they want to execute it.

As a side effect, this means that everything but the text segment
will be non-executable by default, even without the SG_NOEXEC
attribute. Segments with the SG_NOEXEC attribute never become
executable, even when segflush() is called on them.
2020-07-12 21:42:26 +02:00
cinap_lenrek 30ab804b58 kernel: segflush() needs to flush tlb of other processes
instruction cache maintenance is done on tlb miss;
when a page gets fauled in; with putmmu() checking
the page->txtflush cpu bitmap.

syssegflush() used to only call flushmmu() after
segflush() for the calling process, but when a segment
is shared with other processes, we have to flush the
other processes tlb as well.

this adds the missing procflushseg() call into segflush().

note that procflushseg() leaves the calling process alone,
so the flushmmu() call in syssegflush() is still required.

segmentioproc() does not need to call flushmmu() after
segflush() as it is never going to jump to the modified
page, hence the stale icache does not matter.
2020-06-28 16:26:59 +02:00
cinap_lenrek 55d8082842 usbxhci: implement isochronous in transfers (for webcam, audio recording) 2020-06-21 21:42:13 +02:00
cinap_lenrek 4fb65ae3e8 devusb: keep isochronous ep->hz consistent with maxpkt, ntds and pollival
The sample frequency is an artificial parameter used for
isochronous out transfers to better match the target
frequency (usually, a sound card).

when hz is set, devusb adjusts the endpoint's maxpkt to get
the requested frequency and a multiple of the samplesize per
packet.

however, when hz is not set, then we should calculate the
frequency from maxpkt, ntds and pollival, so all parameters
will be consistent with each other.
2020-06-21 21:36:50 +02:00
cinap_lenrek 4eeaedbcaf usbxhci: use 64-bit physical addresses 2020-06-06 15:18:18 +02:00
cinap_lenrek b6becc7a64 devpnp, devether, devusb: cast ISAConf.port to uvlong (for 32-bit implementations)
The ISAConf.port might still be 32-bit on some archs.
2020-06-06 15:17:08 +02:00
cinap_lenrek 6ae50ce330 devusb: print Hci.port as 64-bit uvlong 2020-06-06 15:12:50 +02:00
cinap_lenrek d4213dbce5 devether: print Ether.port as 64-bit uvlong 2020-06-06 15:11:56 +02:00
cinap_lenrek 0a96d33a1c devpnp: print pci membar as 64-bit uvlong 2020-06-06 15:10:23 +02:00
cinap_lenrek 94916808dd kernel: remove unused segment argument in freepte() 2020-05-31 17:25:16 +02:00
cinap_lenrek f59101231a usbehci: release ctlr ilock before calling pollcheck() 2020-05-24 02:43:21 +02:00
cinap_lenrek 3869d7a843 usbehci: avoid kproc() while holding poll lock 2020-05-24 02:11:37 +02:00
cinap_lenrek dbfec06bf1 kernel: fix checkpages() and segflush() on SG_PHYSICAL type segments
do not touch s->map on SG_PHYSICAL type segments as they do
not have a pte map (s->mapsize == 0 && s->map == nil).

also remove the SG_PHYSICAL switch in freepte(), this is never
reached.
2020-05-10 16:54:42 +02:00
cinap_lenrek c474179f9a usbxhci: fix wrong control endpoint 0 output device context address
the calculation for the control endpoint0 output device context
missed the context size scaling shift, resulting in botched
stall handling as we would not read the correct endpoint status
value.

note, this calculation only affected control endpoint 0, which
was handled separately from all other endpoints.
2020-05-10 02:43:39 +02:00
cinap_lenrek 61a062ee9f kernel: improve page reclaimation strategy and locking
when reclaiming pages from an image, always reclaim all
the hash chains equally. that way, we avoid being biased
towards the chains at the start of the Image.pghash[] array.

images can be in two states: active or inactive. inactive
images are the ones which are not used by program while
active ones aare.

when reclaiming pages, we should try to reclaim pages
from inactive images first and only if that set becomes
exhausted attempt to release text pages and attempt to
reclaim pages from active images.

when we run out of Image structures, it makes only sense
to reclaim pages from inactive images, as reclaiming pages
from active ones will never free any Image structures.

change putimage() to require a image already locked and
make it unlock the image. this avoids many pointless
unlock()/lock() sequences as all callers of putimage()
already had the image locked.
2020-04-26 19:54:46 +02:00
Ori Bernstein eb266ded8d remove unused macro from chan.c 2020-04-21 17:32:02 -07:00
cinap_lenrek 1aa80c1d10 kernel: remove unused mem2bl() prototype 2020-04-12 16:11:41 +02:00
cinap_lenrek 1fe3143e4c kernel: cleanup the software mouse cursor mess
The swcursor used a 32x32 image for saving/restoring
screen contents for no reason.

Add a doflush argument to swcursorhide(), so that
disabling software cursor with a double buffered
softscreen is properly hidden. The doflush parameter
should be set to 0 in all other cases as swcursordraw()
will flushes both (current and previours) locations.

Make sure swcursorinit() and swcursorhide() clear the
visibility flag, even when gscreen is nil.

Remove the cursor locking and just do everything within
the drawlock. All cursor functions such as curson(),
cursoff() and setcursor() will be called drawlock
locked. This also means &cursor can be read.

Fix devmouse cursor reads and writes. We now have the
global cursor variable that is only modified under
the drawlock. So copy under drawlock.

Move the pc software cursor implementation into vgasoft
driver, so screen.c does not need to handle it as
a special case.

Remove unused functions such as drawhasclients().
2020-04-10 17:12:51 +02:00
cinap_lenrek 8debb0736e kernel: add portable memory map code (port/memmap.c)
This is a generic memory map for physical addresses. Entries
can be added with memmapadd() giving a range and a type.
Ranges can be allocated and freed from the map. The code
automatically resolves overlapping ranges by type priority.
2020-04-04 16:04:27 +02:00
cinap_lenrek f99b9cae6a devshr: unmount service on #σc/share/mount removal
when the control mountpoint side gets removed, close
mount channel immediately. this is usefull for implementing
automatic cleanup with ORCLOSE create mode.
2020-03-08 18:23:07 +01:00
cinap_lenrek a609c1a2f8 devproc: return process id when reading /proc/n/ctl file
allow reading the control file of a process and return
its pid number. if the process has exited, return an error.

this can be usefull as a way to test if a process is
still alive. and also makes it behave similar to
network protocol directories.

another side effect is that processes who erroneously
open the ctl file ORDWR would be allowed todo so as
along as they have write permission and the process is
not a kernel process.
2020-03-08 14:11:23 +01:00
cinap_lenrek a0879abae4 devproc: don't allow /proc/$pid/ctl to be opens for reading 2020-03-07 23:58:47 +01:00