Commit Graph

1944 Commits

Author SHA1 Message Date
marius
9f542929d1 - Unlike cache invalidation and TLB demapping IPIs, reading registers from
other CPUs doesn't require locking so get rid of it. As the latter is used
  for the timecounter on certain machine models, using a spin lock in this
  case can lead to a deadlock with the upcoming callout(9) rework.
- Merge r134227/r167250 from x86:
  Avoid cross-IPI SMP deadlock by using the smp_ipi_mtx spin lock not only
  for smp_rendezvous_cpus() but also for the MD cache invalidation and TLB
  demapping IPIs.
- Mark some unused function arguments as such.

MFC after:	1 week
2012-08-29 16:56:50 +00:00
gjb
3f013cdf9f Grammar fix: s/NIC's/NICs/
MFC after:	3 days
2012-08-26 01:21:02 +00:00
marius
4c012f63e6 Merge r236494 from x86:
Isolate the global TTE list lock from data and other locks to prevent false
sharing within the cache.

MFC after:	3 days
2012-08-05 22:03:13 +00:00
marius
d339b71305 Switch back to the 4BSD scheduler for now. There is some more or less
recent regression with ULE, causing processes to get stuck in getblk
as well as interrupt handler execution delays to rise above the command
timeout of mpt(4).

MFC after:	3 days
2012-06-30 14:55:36 +00:00
ken
da17d879d7 Now that the mps(4) driver is endian-safe, add it to the powerpc and
sparc64 GENERIC config files.

MFC after:	3 days
2012-06-28 20:48:24 +00:00
alc
c5e6daff9d Add new pmap layer locks to the predefined lock order. Change the names
of a few existing VM locks to follow a consistent naming scheme.
2012-06-27 03:45:25 +00:00
andrew
0a7002aae7 Make the wchar_t type machine dependent.
This is required for ARM EABI. Section 7.1.1 of the Procedure Call for the
ARM Architecture (AAPCS) defines wchar_t as either an unsigned int or an
unsigned short with the former preferred.

Because of this requirement we need to move the definition of __wchar_t to
a machine dependent header. It also cleans up the macros defining the limits
of wchar_t by defining __WCHAR_MIN and __WCHAR_MAX in the same machine
dependent header then using them to define WCHAR_MIN and WCHAR_MAX
respectively.

Discussed with:	bde
2012-06-24 04:15:58 +00:00
kib
7b36a08108 Implement mechanism to export some kernel timekeeping data to
usermode, using shared page.  The structures and functions have vdso
prefix, to indicate the intended location of the code in some future.

The versioned per-algorithm data is exported in the format of struct
vdso_timehands, which mostly repeats the content of in-kernel struct
timehands. Usermode reading of the structure can be lockless.
Compatibility export for 32bit processes on 64bit host is also
provided. Kernel also provides usermode with indication about
currently used timecounter, so that libc can fall back to syscall if
configured timecounter is unknown to usermode code.

The shared data updates are initiated both from the tc_windup(), where
a fast task is queued to do the update, and from sysctl handlers which
change timecounter. A manual override switch
kern.timecounter.fast_gettime allows to turn off the mechanism.

Only x86 architectures export the real algorithm data, and there, only
for tsc timecounter. HPET counters page could be exported as well, but
I prefer to not further glue the kernel and libc ABI there until
proper vdso-based solution is developed.

Minimal stubs neccessary for non-x86 architectures to still compile
are provided.

Discussed with:	bde
Reviewed by:	jhb
Tested by:	flo
MFC after:	1 month
2012-06-22 07:06:40 +00:00
kib
d98ad62d7e Reserve AT_TIMEKEEP auxv entry for providing usermode the pointer to
timekeeping information.

MFC after:  1 week
2012-06-22 06:38:31 +00:00
alc
6eeaee04e4 The page flag PGA_WRITEABLE is set and cleared exclusively by the pmap
layer, but it is read directly by the MI VM layer.  This change introduces
pmap_page_is_write_mapped() in order to completely encapsulate all direct
access to PGA_WRITEABLE in the pmap layer.

Aesthetics aside, I am making this change because amd64 will likely begin
using an alternative method to track write mappings, and having
pmap_page_is_write_mapped() in place allows me to make such a change
without further modification to the MI VM layer.

As an added bonus, tidy up some nearby comments concerning page flags.

Reviewed by:	kib
MFC after:	6 weeks
2012-06-16 18:56:19 +00:00
alc
2616fac7a2 Replace all uses of the vm page queues lock by a r/w lock that is private
to this pmap.c.  This new r/w lock is used primarily to synchronize access
to the TTE lists.  However, it will be used in a somewhat unconventional
way.  As finer-grained TTE list locking is added to each of the pmap
functions that acquire this r/w lock, its acquisition will be changed from
write to read, enabling concurrent execution of the pmap functions with
finer-grained locking.

Reviewed by:	attilio
Tested by:	flo
MFC after:	10 days
2012-05-29 01:52:38 +00:00
marius
3b937b5682 Merge from x86: r232521
Exclude USB drivers (except umass and ukbd) from main kernel image.
2012-05-25 14:52:05 +00:00
bz
cd8b136e12 MFp4 bz_ipv6_fast:
in_cksum.h required ip.h to be included for struct ip.  To be
  able to use some general checksum functions like in_addword()
  in a non-IPv4 context, limit the (also exported to user space)
  IPv4 specific functions to the times, when the ip.h header is
  present and IPVERSION is defined (to 4).

  We should consider more general checksum (updating) functions
  to also allow easier incremental checksum updates in the L3/4
  stack and firewalls, as well as ponder further requirements by
  certain NIC drivers needing slightly different pseudo values
  in offloading cases.  Thinking in terms of a better "library".

  Sponsored by:	The FreeBSD Foundation
  Sponsored by:	iXsystems

Reviewed by:	gnn (as part of the whole)
MFC After:	3 days
2012-05-24 22:00:48 +00:00
mav
56ef4027fe MFprojects/zfsd:
Generalize and unify ses device description.
2012-05-24 11:20:51 +00:00
marius
e5cc26d604 Fix mismerge in r235231. 2012-05-10 15:23:20 +00:00
marius
d42dce6416 Merge r234989 from x86:
Revert part of r234723 by re-enabling the SMP protection for intr_bind().
2012-05-10 15:17:21 +00:00
dim
81a3e2b46d Add a convenience macro for the returns_twice attribute, and apply it to
the prototypes of the appropriate functions (getcontext, savectx,
setjmp, sigsetjmp and vfork).

MFC after:	2 weeks
2012-04-29 11:04:31 +00:00
attilio
0b98e6d835 Clean up the intr* MD KPI from the SMP dependency, removing a cause of
discrepancy between modules and kernel, but deal with SMP differences
within the functions themselves.

As an added bonus this also helps in terms of code readability.

Requested by:	gibbs
Reviewed by:	jhb, marius
MFC after:	1 week
2012-04-26 20:24:25 +00:00
marius
910f312b32 Turn on PREEMPTION by default. After fixing several bugs over time, the
last show-stopper keeping PREEMPTION from being usable on sparc64 should
have been dealt with in r230662.
At least on 2-way systems, PREEMPTION causes a little bit of a degradation
in worldstone performance. However, FreeBSD seems to have started building
up regressions in !PREEMPTION cases so sparc64 better should not be an
oddball in this regard.

MFC after:	1 week
2012-04-16 18:29:07 +00:00
marius
7f51c048df Merge from x86:
r233961:

Fix interrupt load balancing regression, introduced in revision
222813, that left all un-pinned interrupts assigned to CPU 0.
In intr_shuffle_irqs(), remove CPU_SETOF() call that initialized
the "intr_cpus" cpuset to only contain CPU0.

This initialization is too late and nullifies the results of calls
to the intr_add_cpu() that occur much earlier in the boot process.

r234074 (partial):

The BSP is not added to the mask of valid target CPUs for interrupts.
Fix this by adding the BSP as an interrupt target directly in

r234105:

Fix !SMP build after r234074.

MFC after: 3 days
2012-04-13 22:58:23 +00:00
marius
83cd4d31b1 Remove checks that are redundant due to tf_type being unsigned.
MFC after:	3 days
2012-03-31 14:03:16 +00:00
marius
6b88064bda Fix panic on kernel traps having a mapping in trap_sig b0rked in r206086.
Repored by:	David E. Cross

MFC after:	3 days
2012-03-31 13:56:24 +00:00
marius
07d4fd218f - Remove erroneous trailing semicolon. [1]
- Correctly determine the maximum payload size for setting the TX link
  frequent NACK latency and replay timer thresholds.

Submitted by:	stefanf [1]
MFC after:	3 days
2012-03-30 15:08:09 +00:00
marius
306ae35dca Given that this is a host-PCI-Express bridge driver, create the parent
DMA tag with a 4 GB boundary as required by PCI-Express. With r232403 in
place this actually is redundant. However, the host-PCI-Express bridge
driver is the more appropriate place for implementing this restriction.

MFC after:	3 days
2012-03-24 13:11:58 +00:00
ed
619ab2327e Remove pty(4) from our kernel configurations.
As of FreeBSD 8, this driver should not be used. Applications that use
posix_openpt(2) and openpty(3) use the pts(4) that is built into the
kernel unconditionally. If it turns out high profile depend on the
pty(4) module anyway, I'd rather get those fixed. So please report any
issues to me.

The pty(4) module is still available as a kernel module of course, so a
simple `kldload pty' can be used to run old-style pseudo-terminals.
2012-03-21 08:38:42 +00:00
nwhitehorn
6a20b9d5e1 Make ofw_bus_get_node() consistently return -1 when there is no associated
OF node, instead of a random mixture of 0 and -1. Update all checks for 0
to check for -1 instead.

MFC after:	4 weeks
2012-03-15 22:53:39 +00:00
dim
cf2c2fde9c Add casts to __uint16_t to the __bswap16() macros on all arches which
didn't already have them.  This is because the ternary expression will
return int, due to the Usual Arithmetic Conversions.  Such casts are not
needed for the 32 and 64 bit variants.

While here, add additional parentheses around the x86 variant, to
protect against unintended consequences.

MFC after:	2 weeks
2012-03-09 20:34:31 +00:00
attilio
9906b913d9 Disable the option VFS_ALLOW_NONMPSAFE by default on all the supported
platforms.
This will make every attempt to mount a non-mpsafe filesystem to the
kernel forbidden, unless it is expressely compiled with
VFS_ALLOW_NONMPSAFE option.

This patch is part of the effort of killing non-MPSAFE filesystems
from the tree.

No MFC is expected for this patch.
2012-03-06 20:01:25 +00:00
jhb
d6e546f14a - Add a bus_dma tag to each PCI bus that is a child of a Host-PCI bridge.
The tag enforces a single restriction that all DMA transactions must not
  cross a 4GB boundary.  Note that while this restriction technically only
  applies to PCI-express, this change applies it to all PCI devices as it
  is simpler to implement that way and errs on the side of caution.
- Add a softc structure for PCI bus devices to hold the bus_dma tag and
  a new pci_attach_common() routine that performs actions common to the
  attach phase of all PCI bus drivers.  Right now this only consists of
  a bootverbose printf and the allocate of a bus_dma tag if necessary.
- Adjust all PCI bus drivers to allocate a PCI bus softc and to call
  pci_attach_common() from their attach routines.

MFC after:	2 weeks
2012-03-02 20:38:04 +00:00
jhb
5013ab31bd - Change contigmalloc() to use the vm_paddr_t type instead of an unsigned
long for specifying a boundary constraint.
- Change bus_dma tags to use bus_addr_t instead of bus_size_t for boundary
  constraints.

These allow boundary constraints to be fully expressed for cases where
sizeof(bus_addr_t) != sizeof(bus_size_t).  Specifically, it allows a
driver to properly specify a 4GB boundary in a PAE kernel.

Note that this cannot be safely MFC'd without a lot of compat shims due
to KBI changes, so I do not intend to merge it.

Reviewed by:	scottl
2012-03-01 19:58:34 +00:00
marius
16da82cb91 As it turns out r227960 may still be insufficient with PREEMPTION
so try harder to get the CDMA sync interrupt delivered and also in
a more efficient way:
- wrap the whole process of sending and receiving the CDMA sync
  interrupt in a critical section so we don't get preempted,
- send the CDMA sync interrupt to the CPU that is actually waiting
  for it to happen so we don't take a detour via another CPU,
- instead of waiting for up to 15 seconds for the interrupt to
  trigger try the whole process for up to 15 times using a one
  second timeout (the code was also changed to just ignore belated
  interrupts of a previous tries should they appear).

According to testing done by Peter Jeremy with the debugging also
added as part of this commit the first two changes apparently are
sufficient to now properly get the CDMA sync interrupts delivered
at the first try though.
2012-01-28 22:42:33 +00:00
marius
87d49c606e Fully disable interrupts while we fiddle with the FP context in the
VIS-based block copy/zero implementations. While with 4BSD it's
sufficient to just disable the tick interrupts, with ULE+PREEMPTION
it's otherwise also possible that these are preempted via IPIs.
2012-01-28 22:22:05 +00:00
marius
b8bb3e4d75 Commit file missed in r230633. 2012-01-27 23:25:24 +00:00
marius
8ec59afebb Now that we have a working OF_printf() since r230631 and a OF_panic()
helper since r230632, use these for output and panicing during the
early cycles and move cninit() until after the static per-CPU data
has been set up. This solves a couple of issue regarding the non-
availability of the static per-CPU data:
- panic() not working and only making things worse when called,
- having to supply a special DELAY() implementation to the low-level
  console drivers,
- curthread accesses of mutex(9) usage in low-level console drivers
  that aren't conditional due to compiler optimizations (basically,
  this is the problem described in r227537 but in this case for
  keyboards attached via uart(4)). [1]

PR:	164123 [1]
2012-01-27 23:21:54 +00:00
marius
43204e516a - Now that we have a working OF_printf() since r230631, use it for
implementing a simple OF_panic() that may be used during the early
  cycles when panic() isn't available, yet.
- Mark cpu_{exit,shutdown}() as __dead2 as appropriate.
2012-01-27 22:35:53 +00:00
marius
f3dd9013de For machines where the kernel address space is unrestricted increase
VM_KMEM_SIZE_SCALE to 2, awaiting more insight from alc@. As it turns
out, the VM apparently has problems with machines that have large holes
in the physical address space, causing the kmem_suballoc() call in
kmeminit() to fail with a VM_KMEM_SIZE_SCALE of 1. Using a value of 2
allows these, namely Blade 1500 with 2GB of RAM, to boot.

PR:	164227
2012-01-27 22:25:46 +00:00
marius
16ae182079 Mark cpu_{halt,reset}() as __dead2 as appropriate. 2012-01-27 22:04:43 +00:00
das
9feb719605 Add C11 macros describing subnormal numbers to float.h.
Reviewed by:	bde
2012-01-23 06:36:41 +00:00
ken
fce645c153 Add the CAM Target Layer (CTL).
CTL is a disk and processor device emulation subsystem originally written
for Copan Systems under Linux starting in 2003.  It has been shipping in
Copan (now SGI) products since 2005.

It was ported to FreeBSD in 2008, and thanks to an agreement between SGI
(who acquired Copan's assets in 2010) and Spectra Logic in 2010, CTL is
available under a BSD-style license.  The intent behind the agreement was
that Spectra would work to get CTL into the FreeBSD tree.

Some CTL features:

 - Disk and processor device emulation.
 - Tagged queueing
 - SCSI task attribute support (ordered, head of queue, simple tags)
 - SCSI implicit command ordering support.  (e.g. if a read follows a mode
   select, the read will be blocked until the mode select completes.)
 - Full task management support (abort, LUN reset, target reset, etc.)
 - Support for multiple ports
 - Support for multiple simultaneous initiators
 - Support for multiple simultaneous backing stores
 - Persistent reservation support
 - Mode sense/select support
 - Error injection support
 - High Availability support (1)
 - All I/O handled in-kernel, no userland context switch overhead.

(1) HA Support is just an API stub, and needs much more to be fully
    functional.

ctl.c:			The core of CTL.  Command handlers and processing,
			character driver, and HA support are here.

ctl.h:			Basic function declarations and data structures.

ctl_backend.c,
ctl_backend.h:		The basic CTL backend API.

ctl_backend_block.c,
ctl_backend_block.h:	The block and file backend.  This allows for using
			a disk or a file as the backing store for a LUN.
			Multiple threads are started to do I/O to the
			backing device, primarily because the VFS API
			requires that to get any concurrency.

ctl_backend_ramdisk.c:	A "fake" ramdisk backend.  It only allocates a
			small amount of memory to act as a source and sink
			for reads and writes from an initiator.  Therefore
			it cannot be used for any real data, but it can be
			used to test for throughput.  It can also be used
			to test initiators' support for extremely large LUNs.

ctl_cmd_table.c:	This is a table with all 256 possible SCSI opcodes,
			and command handler functions defined for supported
			opcodes.

ctl_debug.h:		Debugging support.

ctl_error.c,
ctl_error.h:		CTL-specific wrappers around the CAM sense building
			functions.

ctl_frontend.c,
ctl_frontend.h:		These files define the basic CTL frontend port API.

ctl_frontend_cam_sim.c:	This is a CTL frontend port that is also a CAM SIM.
			This frontend allows for using CTL without any
			target-capable hardware.  So any LUNs you create in
			CTL are visible in CAM via this port.

ctl_frontend_internal.c,
ctl_frontend_internal.h:
			This is a frontend port written for Copan to do
			some system-specific tasks that required sending
			commands into CTL from inside the kernel.  This
			isn't entirely relevant to FreeBSD in general,
			but can perhaps be repurposed.

ctl_ha.h:		This is a stubbed-out High Availability API.  Much
			more is needed for full HA support.  See the
			comments in the header and the description of what
			is needed in the README.ctl.txt file for more
			details.

ctl_io.h:		This defines most of the core CTL I/O structures.
			union ctl_io is conceptually very similar to CAM's
			union ccb.

ctl_ioctl.h:		This defines all ioctls available through the CTL
			character device, and the data structures needed
			for those ioctls.

ctl_mem_pool.c,
ctl_mem_pool.h:		Generic memory pool implementation used by the
			internal frontend.

ctl_private.h:		Private data structres (e.g. CTL softc) and
			function prototypes.  This also includes the SCSI
			vendor and product names used by CTL.

ctl_scsi_all.c,
ctl_scsi_all.h:		CTL wrappers around CAM sense printing functions.

ctl_ser_table.c:	Command serialization table.  This defines what
			happens when one type of command is followed by
			another type of command.

ctl_util.c,
ctl_util.h:		CTL utility functions, primarily designed to be
			used from userland.  See ctladm for the primary
			consumer of these functions.  These include CDB
			building functions.

scsi_ctl.c:		CAM target peripheral driver and CTL frontend port.
			This is the path into CTL for commands from
			target-capable hardware/SIMs.

README.ctl.txt:		CTL code features, roadmap, to-do list.

usr.sbin/Makefile:	Add ctladm.

ctladm/Makefile,
ctladm/ctladm.8,
ctladm/ctladm.c,
ctladm/ctladm.h,
ctladm/util.c:		ctladm(8) is the CTL management utility.
			It fills a role similar to camcontrol(8).
			It allow configuring LUNs, issuing commands,
			injecting errors and various other control
			functions.

usr.bin/Makefile:	Add ctlstat.

ctlstat/Makefile
ctlstat/ctlstat.8,
ctlstat/ctlstat.c:	ctlstat(8) fills a role similar to iostat(8).
			It reports I/O statistics for CTL.

sys/conf/files:		Add CTL files.

sys/conf/NOTES:		Add device ctl.

sys/cam/scsi_all.h:	To conform to more recent specs, the inquiry CDB
			length field is now 2 bytes long.

			Add several mode page definitions for CTL.

sys/cam/scsi_all.c:	Handle the new 2 byte inquiry length.

sys/dev/ciss/ciss.c,
sys/dev/ata/atapi-cam.c,
sys/cam/scsi/scsi_targ_bh.c,
scsi_target/scsi_cmds.c,
mlxcontrol/interface.c:	Update for 2 byte inquiry length field.

scsi_da.h:		Add versions of the format and rigid disk pages
			that are in a more reasonable format for CTL.

amd64/conf/GENERIC,
i386/conf/GENERIC,
ia64/conf/GENERIC,
sparc64/conf/GENERIC:	Add device ctl.

i386/conf/PAE:		The CTL frontend SIM at least does not compile
			cleanly on PAE.

Sponsored by:	Copan Systems, SGI and Spectra Logic
MFC after:	1 month
2012-01-12 00:34:33 +00:00
rwatson
a7ba7afe9c Add "options CAPABILITY_MODE" and "options CAPABILITIES" to GENERIC kernel
configurations for various architectures in FreeBSD 10.x.  This allows
basic Capsicum functionality to be used in the default FreeBSD
configuration on non-embedded architectures; process descriptors are not
yet enabled by default.

MFC after:	3 months
Sponsored by:	Google, Inc
2011-12-29 22:48:36 +00:00
alc
d368df9b98 Eliminate vestiges of page coloring. 2011-12-15 05:07:16 +00:00
ed
cb983d98e7 Replace __signed by signed.
The signed keyword is an integral part of the C syntax. There's no need
to use __signed.
2011-12-13 13:38:03 +00:00
marius
6779d3e54c Revert r225889 a bit. While it's correct that in total store order there's
no need to additionally add CPU memory barriers to the acquire variants of
atomic(9), these are documented to also include compiler memory barriers.
So add the latter, which were previously included by using membar(), back.
2011-12-03 13:51:57 +00:00
jchandra
e5b89f2d70 Fix OF_finddevice error return value in case of FDT.
According to the open firmware standard, finddevice call has to return
a phandle with value of -1 in case of error.

This commit is to:
- Fix the FDT implementation of this interface (ofw_fdt_finddevice) to
  return (phandle_t)-1 in case of error, instead of 0 as it does now.
- Fix up the callers of OF_finddevice() to compare the return value with
  -1 instead of 0 to check for errors.
- Since phandle_t is unsigned, the return value of OF_finddevice should
  be checked with '== -1' rather than '<= 0' or '> 0', fix up these cases
  as well.

Reported by:	nwhitehorn

Reviewed by:	raj
Approved by:	raj, nwhitehorn
2011-12-02 15:24:39 +00:00
marius
eda2646a46 Update comment. 2011-11-27 15:49:46 +00:00
marius
5846bf2bc1 For sparc64 also adjust the geometry of da(4) driven disks to not overflow
the 16-bit cylinders field of the VTOC8 disk label (at around 502GB). The
geometry chosen for disks above that limit allows to use disks up to 2TB,
which is the limit of the extended VTOC8 format. The geometry used for
disks smaller than the 16-bit cylinders limit stays the same as used by
cam_calc_geometry(9) for extended translation.
Thanks to Hans-Joerg Sirtl for providing hardware for testing this change.

MFC after:	3 days
2011-11-27 15:43:40 +00:00
marius
0808475dfb Move to SCHED_ULE by default. Since r226057 SCHED_ULE and sparc64 are
compatible with each other and since r227539 the last issue seen when
using SCHED_ULE is fixed. At least on UP and 2-way machines SCHED_4BSD
still performs better than SCHED_ULE, however, the optimizations done
in r225889 pretty much compensate that so there's at least no net
regression.
Thanks go to Peter Jeremy for extensive testing.
2011-11-25 17:40:01 +00:00
marius
9fd6682e78 Increase the CDMA sync timeout for Schizo bridges to 15 seconds as used by
OpenSolaris. One second turned out to be not enough for certain loads while
10 seconds were sufficient.
Reported by: Peter Jeremy

MFC after:	3 days
2011-11-24 23:48:22 +00:00
marius
1b8636b892 s,KOBJMETHOD_END,DEVMETHOD_END,g in order to fully hide the explicit mention
of kobj(9) from device drivers.
2011-11-22 21:55:40 +00:00
marius
17e14c6132 - There's no need to overwrite the default device method with the default
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00