s/mangement/management/ in comments.

Merge thorpej-cfargs2.

branches: 1.109.8;
Merge thorpej-cfargs branch:

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

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

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

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

...and a sentinel value CFARG_EOL.

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

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

branches: 1.108.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

use pci_intr_establish_xname() everywhere

branches: 1.106.6; 1.106.14; 1.106.16;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.105.2;
KNF. No functional change.

KNF. Remove extra spaces. No functional change.

branches: 1.103.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.102.2;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

Remove unused variable

branches: 1.98.2;
fix device/softc split: initialize sc->sc_dev.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.96.6;
extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

branches: 1.95.2; 1.95.6;
dependant -> dependent

Explicitly get rid of constness.

branches: 1.93.2;
Avoid pointless use of a sysctl definition, CTL_NAMES. Clean up whitespace.

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

printf() size_t with 'z' format modifier in debug code.

branches: 1.90.2; 1.90.4;
use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

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

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

branches: 1.87.12;
Replace device_lookup() with device_lookup_private() on getting softc
for future device_t/softc spilt.

branches: 1.86.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.85.2; 1.85.4;
use aprint_*_dev and device_xname

branches: 1.84.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.83.2; 1.83.14; 1.83.16; 1.83.20;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.82.2;
Change kauth(9) KPI for kauth_authorize_device_passthru() to add another
argument, u_long, serving as a bit-mask of generic requests for the
passthru request.

Discussed on tech-security@ and tech-kern@. Okay tls@.

branches: 1.81.2;
__unused removal on arguments; approved by core.

Replace securelevel checks with kauth(9) calls.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.78.2; 1.78.4;
- add missing initializer
- add missing function decl

Initialize a variable to 0 to appease gcc4 with -O3.

Acting as Elad's keyboard:

Place the securelevel checks in their logical locations.
This will be clearer in the future when code changes to use kauth(9) calls.

input and okay ad@

Coverity ID 2859: Don't leak ccb, move the allocation a few lines
lower next to where it'll be used for the first time.

branches: 1.74.2; 1.74.4; 1.74.6;
Fix memory leak in the TWEIO_GET_PARAM ioctl.
Tested by gendalia@.

branches: 1.73.2; 1.73.4;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.72.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

kill some more simple submatch() functions, use config_stdsubmatch()

replace the "locdesc_t" structure carrying the number of locators
explicitely by a plain integer array
the length in now known to all relevant parties, so this avoids
duplication of information, and we can allocate that thing in
drivers without hacks

branches: 1.68.2;
Use ANSI function decls and static.

Change the rest of the sysctl subsystem to use const consistently.
The __UNCONST macro is now used only where necessary and the RW macros
are gone. Most of the changes here are consumers of the
sysctl_createv(9) interface that now takes a pair of const pointers
which used not to be.

- const poisoning
- avoid variable shadowing.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

branches: 1.64.2; 1.64.4;
Fix PR#24302. Clear PCI abort and parity errors to give the card a chance at
working. Patch provided by Jean-Luc Wasmer, based on the FreeBSD driver.

nuke trailing whitespace

Add sysctl node hw.tweN.driver_version whose value is FreeBSD's driver version
number for now. This is used by 3ware's FreeBSD version of their CLI to find
controllers and check the driver version.

Add some more stripe sizes observed in the field.
Add "JBOD" to twe_table_unittype[].

branches: 1.60.4; 1.60.6;
Take the modulus of the AEN queue tail number rather than the mask of. Now
the tail pointer advances properly.

a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

twe_ccb_map(): Remove the DEBUG panic case of "unknown" S/G list offset.
In all likelihood, this is a command passed from userspace management
tools where no S/G list is needed because no data is being passed.

Double the time we wait for the attention bit following a soft reset (and make
the timeout message just a bit clearer), as the latest firmware appears to be
a bit slower.
OK from Jason Thorpe.

Rename twe_tweio_command_handler() to twe_ccb_wait_handler() and expose it.

Assign a syslog priority to the AEN codes and use that priority when
logging the error message. Potentially allows critical messages to be
noticed much more quickly.

branches: 1.54.2;
When performing command pass-through for management tools, don't poll
for CCB completion. Instead, sleep, and use a CCB callback to wake the
sleeper.

Correct the size passed to a malloc() call when performing command
passthrough for userland management tools.

Remove some assigned-to but otherwise unused variables.

Fix up the TWEIO_COMMAND code to actually work. The 3ware management API
library can now communicate with the card.

- Fix a bug I introduced in a previous commit (oops).
- Add the twe_drivecommand ioctl structure.

- Make CCB allocation slightly more efficient by changing how the
CCB is returned to the caller.
- Make code paths that can use twe_ccb_alloc_wait() use it, and assert
that a CCB is always returned from that function.
- Assert that a CCB is always returned when allocating the reserved CCB
for an AEN fetch.

Add a comment clarifying why we clear TWEF_AEN in twe_reset() now.

Separate the AEN fetching path into its own special path that uses the
reserved CCB. This means that all remaining callers of twe_param_get*()
are called from a valid thread context, and thus have no need to use a
reserved CCB. This will allow for further cleanup in a future commit.

Add support for dynamically attaching and detaching RAID array units.

Improve AEN handling:
- Make AENs use the generic code table stuff.
- Add a few more AEN codes (from FreeBSD).
- Correct the context of a few AEN codes (some were listed as
"unit context" when they're really "port context").
- Add a queue of AENs that management tools in userspace can poll
(from FreeBSD).

Fetch info about the drives during attach, and inject that info
into the msgbuf using aprint_verbose().

Expose the "param get" functions.

- Record more information about the array unit, including array
type and stripe depth.
- Report array type and stripe depth when attaching the logical drive.

Add some helper routines to fetch 1, 2, and 4 byte parameter values.

Modeled after code in FreeBSD.

Add some additional code -> description tables, and add a generic
routine to translate code -> description. AENs will be converted
to this mechanism in a future commit.

Partially from FreeBSD.

tweioctl(): store the result of twe_param_get() directly to the right
variable rather than using (void *) temporary
should fix strict aliasing warning of gcc 3.3

print some additional information about the controller on boot (from FreeBSD)

use aprint_* as appropriate
change some debug #ifdef DIAGNOSTIC messages into #ifdef DEBUG
make aenfmt[] more const
change twe_param_get() signature to take (struct twe_param **) last arg, and
remove now unnecessary casts

branches: 1.37.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Use aprint_normal() in cfprint routines.

Remove comparison of u_int8_t value to (512 - a few bytes), since it's
always false. As found by gcc-current.

Add /dev/twex support. To be used with FreeBSD's 3dmd.
Initial port from Masaru OKI <oki@netbsd.org>, with KNF, memory leak fixes,
denial of service problems, and null pointer fixes from me.

Avoid strict-alias warnings.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.

Missing comma in aenfmt array initialization.

Add missing messages from FreeBSD's driver. Re-organize a bit how the
message is formatted and printed.

SIMPLEQ rototill:
- implement SIMPLEQ_REMOVE(head, elm, type, field). whilst it's O(n),
this mirrors the functionality of SLIST_REMOVE() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE()
- remove the unnecessary elm arg from SIMPLEQ_REMOVE_HEAD().
this mirrors the functionality of SLIST_REMOVE_HEAD() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE_HEAD()
- remove notes about SIMPLEQ not supporting arbitrary element removal
- use SIMPLEQ_FOREACH() instead of home-grown for loops
- use SIMPLEQ_EMPTY() appropriately
- use SIMPLEQ_*() instead of accessing sqh_first,sqh_last,sqe_next directly
- reorder manual page; be consistent about how the types are listed
- other minor cleanups

NBPG is not constant on the sparc, so don't use CPP tricks.

Deal with the NBPG problem in a better way.

branches: 1.22.2;
- Use write barriers.
- NBPG -> PAGE_SIZE.

branches: 1.21.8;
add RCSID

branches: 1.20.4;
Back out previous - it causes panics.

Use bus_dma to get temporary I/O buffers.

Spell 'occurred' with two 'r's.

a whole bunch of changes to improve performance and robustness under load:

- remove special treatment of pager_map mappings in pmaps. this is
required now, since I've removed the globals that expose the address range.
pager_map now uses pmap_kenter_pa() instead of pmap_enter(), so there's
no longer any need to special-case it.
- eliminate struct uvm_vnode by moving its fields into struct vnode.
- rewrite the pageout path. the pager is now responsible for handling the
high-level requests instead of only getting control after a bunch of work
has already been done on its behalf. this will allow us to UBCify LFS,
which needs tighter control over its pages than other filesystems do.
writing a page to disk no longer requires making it read-only, which
allows us to write wired pages without causing all kinds of havoc.
- use a new PG_PAGEOUT flag to indicate that a page should be freed
on behalf of the pagedaemon when it's unlocked. this flag is very similar
to PG_RELEASED, but unlike PG_RELEASED, PG_PAGEOUT can be cleared if the
pageout fails due to eg. an indirect-block buffer being locked.
this allows us to remove the "version" field from struct vm_page,
and together with shrinking "loan_count" from 32 bits to 16,
struct vm_page is now 4 bytes smaller.
- no longer use PG_RELEASED for swap-backed pages. if the page is busy
because it's being paged out, we can't release the swap slot to be
reallocated until that write is complete, but unlike with vnodes we
don't keep a count of in-progress writes so there's no good way to
know when the write is done. instead, when we need to free a busy
swap-backed page, just sleep until we can get it busy ourselves.
- implement a fast-path for extending writes which allows us to avoid
zeroing new pages. this substantially reduces cpu usage.
- encapsulate the data used by the genfs code in a struct genfs_node,
which must be the first element of the filesystem-specific vnode data
for filesystems which use genfs_{get,put}pages().
- eliminate many of the UVM pagerops, since they aren't needed anymore
now that the pager "put" operation is a higher-level operation.
- enhance the genfs code to allow NFS to use the genfs_{get,put}pages
instead of a modified copy.
- clean up struct vnode by removing all the fields that used to be used by
the vfs_cluster.c code (which we don't use anymore with UBC).
- remove kmem_object and mb_object since they were useless.
instead of allocating pages to these objects, we now just allocate
pages with no object. such pages are mapped in the kernel until they
are freed, so we can use the mapping to find the page to free it.
this allows us to remove splvm() protection in several places.

The sum of all these changes improves write throughput on my
decstation 5000/200 to within 1% of the rate of NetBSD 1.5
and reduces the elapsed time for "make release" of a NetBSD 1.5
source tree on my 128MB pc to 10% less than a 1.5 kernel took.

branches: 1.16.2;
Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.15.2;
Reduce the delay when polling so that dumps go faster.

AEN 0x000c appears to mean `init started'. From lukem.

Add BUS_DMA_STREAMING to data transfer maps.

branches: 1.12.2;
Don't choke when we get lots of AENs all at once.

Wait 10x longer for status bits.

Match an upcoming product.

Oops, be sure to clear the ATTN interrupt on error.

opt_twe.h isn't needed any more.

- Complain if interrupt-driven retrieval of AENs fails somehow.
- Clamp the number of outstanding commands to 129.
- Other tweaks.

splimp() -> splvm()

Change pci_intr_map to get interrupt source information from a "struct
pci_attach_args *" instead of from four separate parameters which in
all cases were extracted from the same "struct pci_attach_args".

This both simplifies the driver api, and allows for alternate PCI
interrupt mapping schemes, such as one using the tables described in
the Intel Multiprocessor Spec which describe interrupt wirings for
devices behind pci-pci bridges based on the device's location rather
the bridge's location.

Tested on alpha and i386; welcome to 1.5Q

branches: 1.4.2;
NBPG -> PAGE_SIZE

- Pull in some updates from FreeBSD - mainly clarifications. Thanks to
Mike Smith <msmith@freebsd.org> for pointing these out.
- Ensure that we get AENs: reserve one CCB/command block for parameter
retrieval, and chain AEN retrievals that are the result of an interrupt.

- tsleep()/wakeup_one() will hurt when under load, so use a queue instead.
- Don't copy to or from the aligned buffer unless there's a need to.

Driver for the 3ware Escalade family of RAID controllers.

Merge thorpej-cfargs2.

branches: 1.109.8;
Merge thorpej-cfargs branch:

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

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

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

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

...and a sentinel value CFARG_EOL.

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

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

branches: 1.108.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

use pci_intr_establish_xname() everywhere

branches: 1.106.6; 1.106.14; 1.106.16;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.105.2;
KNF. No functional change.

KNF. Remove extra spaces. No functional change.

branches: 1.103.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.102.2;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

Remove unused variable

branches: 1.98.2;
fix device/softc split: initialize sc->sc_dev.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.96.6;
extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

branches: 1.95.2; 1.95.6;
dependant -> dependent

Explicitly get rid of constness.

branches: 1.93.2;
Avoid pointless use of a sysctl definition, CTL_NAMES. Clean up whitespace.

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

printf() size_t with 'z' format modifier in debug code.

branches: 1.90.2; 1.90.4;
use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

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

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

branches: 1.87.12;
Replace device_lookup() with device_lookup_private() on getting softc
for future device_t/softc spilt.

branches: 1.86.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.85.2; 1.85.4;
use aprint_*_dev and device_xname

branches: 1.84.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.83.2; 1.83.14; 1.83.16; 1.83.20;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.82.2;
Change kauth(9) KPI for kauth_authorize_device_passthru() to add another
argument, u_long, serving as a bit-mask of generic requests for the
passthru request.

Discussed on tech-security@ and tech-kern@. Okay tls@.

branches: 1.81.2;
__unused removal on arguments; approved by core.

Replace securelevel checks with kauth(9) calls.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.78.2; 1.78.4;
- add missing initializer
- add missing function decl

Initialize a variable to 0 to appease gcc4 with -O3.

Acting as Elad's keyboard:

Place the securelevel checks in their logical locations.
This will be clearer in the future when code changes to use kauth(9) calls.

input and okay ad@

Coverity ID 2859: Don't leak ccb, move the allocation a few lines
lower next to where it'll be used for the first time.

branches: 1.74.2; 1.74.4; 1.74.6;
Fix memory leak in the TWEIO_GET_PARAM ioctl.
Tested by gendalia@.

branches: 1.73.2; 1.73.4;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.72.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

kill some more simple submatch() functions, use config_stdsubmatch()

replace the "locdesc_t" structure carrying the number of locators
explicitely by a plain integer array
the length in now known to all relevant parties, so this avoids
duplication of information, and we can allocate that thing in
drivers without hacks

branches: 1.68.2;
Use ANSI function decls and static.

Change the rest of the sysctl subsystem to use const consistently.
The __UNCONST macro is now used only where necessary and the RW macros
are gone. Most of the changes here are consumers of the
sysctl_createv(9) interface that now takes a pair of const pointers
which used not to be.

- const poisoning
- avoid variable shadowing.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

branches: 1.64.2; 1.64.4;
Fix PR#24302. Clear PCI abort and parity errors to give the card a chance at
working. Patch provided by Jean-Luc Wasmer, based on the FreeBSD driver.

nuke trailing whitespace

Add sysctl node hw.tweN.driver_version whose value is FreeBSD's driver version
number for now. This is used by 3ware's FreeBSD version of their CLI to find
controllers and check the driver version.

Add some more stripe sizes observed in the field.
Add "JBOD" to twe_table_unittype[].

branches: 1.60.4; 1.60.6;
Take the modulus of the AEN queue tail number rather than the mask of. Now
the tail pointer advances properly.

a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

twe_ccb_map(): Remove the DEBUG panic case of "unknown" S/G list offset.
In all likelihood, this is a command passed from userspace management
tools where no S/G list is needed because no data is being passed.

Double the time we wait for the attention bit following a soft reset (and make
the timeout message just a bit clearer), as the latest firmware appears to be
a bit slower.
OK from Jason Thorpe.

Rename twe_tweio_command_handler() to twe_ccb_wait_handler() and expose it.

Assign a syslog priority to the AEN codes and use that priority when
logging the error message. Potentially allows critical messages to be
noticed much more quickly.

branches: 1.54.2;
When performing command pass-through for management tools, don't poll
for CCB completion. Instead, sleep, and use a CCB callback to wake the
sleeper.

Correct the size passed to a malloc() call when performing command
passthrough for userland management tools.

Remove some assigned-to but otherwise unused variables.

Fix up the TWEIO_COMMAND code to actually work. The 3ware management API
library can now communicate with the card.

- Fix a bug I introduced in a previous commit (oops).
- Add the twe_drivecommand ioctl structure.

- Make CCB allocation slightly more efficient by changing how the
CCB is returned to the caller.
- Make code paths that can use twe_ccb_alloc_wait() use it, and assert
that a CCB is always returned from that function.
- Assert that a CCB is always returned when allocating the reserved CCB
for an AEN fetch.

Add a comment clarifying why we clear TWEF_AEN in twe_reset() now.

Separate the AEN fetching path into its own special path that uses the
reserved CCB. This means that all remaining callers of twe_param_get*()
are called from a valid thread context, and thus have no need to use a
reserved CCB. This will allow for further cleanup in a future commit.

Add support for dynamically attaching and detaching RAID array units.

Improve AEN handling:
- Make AENs use the generic code table stuff.
- Add a few more AEN codes (from FreeBSD).
- Correct the context of a few AEN codes (some were listed as
"unit context" when they're really "port context").
- Add a queue of AENs that management tools in userspace can poll
(from FreeBSD).

Fetch info about the drives during attach, and inject that info
into the msgbuf using aprint_verbose().

Expose the "param get" functions.

- Record more information about the array unit, including array
type and stripe depth.
- Report array type and stripe depth when attaching the logical drive.

Add some helper routines to fetch 1, 2, and 4 byte parameter values.

Modeled after code in FreeBSD.

Add some additional code -> description tables, and add a generic
routine to translate code -> description. AENs will be converted
to this mechanism in a future commit.

Partially from FreeBSD.

tweioctl(): store the result of twe_param_get() directly to the right
variable rather than using (void *) temporary
should fix strict aliasing warning of gcc 3.3

print some additional information about the controller on boot (from FreeBSD)

use aprint_* as appropriate
change some debug #ifdef DIAGNOSTIC messages into #ifdef DEBUG
make aenfmt[] more const
change twe_param_get() signature to take (struct twe_param **) last arg, and
remove now unnecessary casts

branches: 1.37.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Use aprint_normal() in cfprint routines.

Remove comparison of u_int8_t value to (512 - a few bytes), since it's
always false. As found by gcc-current.

Add /dev/twex support. To be used with FreeBSD's 3dmd.
Initial port from Masaru OKI <oki@netbsd.org>, with KNF, memory leak fixes,
denial of service problems, and null pointer fixes from me.

Avoid strict-alias warnings.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.

Missing comma in aenfmt array initialization.

Add missing messages from FreeBSD's driver. Re-organize a bit how the
message is formatted and printed.

SIMPLEQ rototill:
- implement SIMPLEQ_REMOVE(head, elm, type, field). whilst it's O(n),
this mirrors the functionality of SLIST_REMOVE() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE()
- remove the unnecessary elm arg from SIMPLEQ_REMOVE_HEAD().
this mirrors the functionality of SLIST_REMOVE_HEAD() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE_HEAD()
- remove notes about SIMPLEQ not supporting arbitrary element removal
- use SIMPLEQ_FOREACH() instead of home-grown for loops
- use SIMPLEQ_EMPTY() appropriately
- use SIMPLEQ_*() instead of accessing sqh_first,sqh_last,sqe_next directly
- reorder manual page; be consistent about how the types are listed
- other minor cleanups

NBPG is not constant on the sparc, so don't use CPP tricks.

Deal with the NBPG problem in a better way.

branches: 1.22.2;
- Use write barriers.
- NBPG -> PAGE_SIZE.

branches: 1.21.8;
add RCSID

branches: 1.20.4;
Back out previous - it causes panics.

Use bus_dma to get temporary I/O buffers.

Spell 'occurred' with two 'r's.

a whole bunch of changes to improve performance and robustness under load:

- remove special treatment of pager_map mappings in pmaps. this is
required now, since I've removed the globals that expose the address range.
pager_map now uses pmap_kenter_pa() instead of pmap_enter(), so there's
no longer any need to special-case it.
- eliminate struct uvm_vnode by moving its fields into struct vnode.
- rewrite the pageout path. the pager is now responsible for handling the
high-level requests instead of only getting control after a bunch of work
has already been done on its behalf. this will allow us to UBCify LFS,
which needs tighter control over its pages than other filesystems do.
writing a page to disk no longer requires making it read-only, which
allows us to write wired pages without causing all kinds of havoc.
- use a new PG_PAGEOUT flag to indicate that a page should be freed
on behalf of the pagedaemon when it's unlocked. this flag is very similar
to PG_RELEASED, but unlike PG_RELEASED, PG_PAGEOUT can be cleared if the
pageout fails due to eg. an indirect-block buffer being locked.
this allows us to remove the "version" field from struct vm_page,
and together with shrinking "loan_count" from 32 bits to 16,
struct vm_page is now 4 bytes smaller.
- no longer use PG_RELEASED for swap-backed pages. if the page is busy
because it's being paged out, we can't release the swap slot to be
reallocated until that write is complete, but unlike with vnodes we
don't keep a count of in-progress writes so there's no good way to
know when the write is done. instead, when we need to free a busy
swap-backed page, just sleep until we can get it busy ourselves.
- implement a fast-path for extending writes which allows us to avoid
zeroing new pages. this substantially reduces cpu usage.
- encapsulate the data used by the genfs code in a struct genfs_node,
which must be the first element of the filesystem-specific vnode data
for filesystems which use genfs_{get,put}pages().
- eliminate many of the UVM pagerops, since they aren't needed anymore
now that the pager "put" operation is a higher-level operation.
- enhance the genfs code to allow NFS to use the genfs_{get,put}pages
instead of a modified copy.
- clean up struct vnode by removing all the fields that used to be used by
the vfs_cluster.c code (which we don't use anymore with UBC).
- remove kmem_object and mb_object since they were useless.
instead of allocating pages to these objects, we now just allocate
pages with no object. such pages are mapped in the kernel until they
are freed, so we can use the mapping to find the page to free it.
this allows us to remove splvm() protection in several places.

The sum of all these changes improves write throughput on my
decstation 5000/200 to within 1% of the rate of NetBSD 1.5
and reduces the elapsed time for "make release" of a NetBSD 1.5
source tree on my 128MB pc to 10% less than a 1.5 kernel took.

branches: 1.16.2;
Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.15.2;
Reduce the delay when polling so that dumps go faster.

AEN 0x000c appears to mean `init started'. From lukem.

Add BUS_DMA_STREAMING to data transfer maps.

branches: 1.12.2;
Don't choke when we get lots of AENs all at once.

Wait 10x longer for status bits.

Match an upcoming product.

Oops, be sure to clear the ATTN interrupt on error.

opt_twe.h isn't needed any more.

- Complain if interrupt-driven retrieval of AENs fails somehow.
- Clamp the number of outstanding commands to 129.
- Other tweaks.

splimp() -> splvm()

Change pci_intr_map to get interrupt source information from a "struct
pci_attach_args *" instead of from four separate parameters which in
all cases were extracted from the same "struct pci_attach_args".

This both simplifies the driver api, and allows for alternate PCI
interrupt mapping schemes, such as one using the tables described in
the Intel Multiprocessor Spec which describe interrupt wirings for
devices behind pci-pci bridges based on the device's location rather
the bridge's location.

Tested on alpha and i386; welcome to 1.5Q

branches: 1.4.2;
NBPG -> PAGE_SIZE

- Pull in some updates from FreeBSD - mainly clarifications. Thanks to
Mike Smith <msmith@freebsd.org> for pointing these out.
- Ensure that we get AENs: reserve one CCB/command block for parameter
retrieval, and chain AEN retrievals that are the result of an interrupt.

- tsleep()/wakeup_one() will hurt when under load, so use a queue instead.
- Don't copy to or from the aligned buffer unless there's a need to.

Driver for the 3ware Escalade family of RAID controllers.

Merge thorpej-cfargs branch:

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

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

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

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

...and a sentinel value CFARG_EOL.

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

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

branches: 1.108.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

use pci_intr_establish_xname() everywhere

branches: 1.106.6; 1.106.14; 1.106.16;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.105.2;
KNF. No functional change.

KNF. Remove extra spaces. No functional change.

branches: 1.103.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.102.2;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

Remove unused variable

branches: 1.98.2;
fix device/softc split: initialize sc->sc_dev.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.96.6;
extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

branches: 1.95.2; 1.95.6;
dependant -> dependent

Explicitly get rid of constness.

branches: 1.93.2;
Avoid pointless use of a sysctl definition, CTL_NAMES. Clean up whitespace.

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

printf() size_t with 'z' format modifier in debug code.

branches: 1.90.2; 1.90.4;
use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

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

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

branches: 1.87.12;
Replace device_lookup() with device_lookup_private() on getting softc
for future device_t/softc spilt.

branches: 1.86.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.85.2; 1.85.4;
use aprint_*_dev and device_xname

branches: 1.84.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.83.2; 1.83.14; 1.83.16; 1.83.20;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.82.2;
Change kauth(9) KPI for kauth_authorize_device_passthru() to add another
argument, u_long, serving as a bit-mask of generic requests for the
passthru request.

Discussed on tech-security@ and tech-kern@. Okay tls@.

branches: 1.81.2;
__unused removal on arguments; approved by core.

Replace securelevel checks with kauth(9) calls.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.78.2; 1.78.4;
- add missing initializer
- add missing function decl

Initialize a variable to 0 to appease gcc4 with -O3.

Acting as Elad's keyboard:

Place the securelevel checks in their logical locations.
This will be clearer in the future when code changes to use kauth(9) calls.

input and okay ad@

Coverity ID 2859: Don't leak ccb, move the allocation a few lines
lower next to where it'll be used for the first time.

branches: 1.74.2; 1.74.4; 1.74.6;
Fix memory leak in the TWEIO_GET_PARAM ioctl.
Tested by gendalia@.

branches: 1.73.2; 1.73.4;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.72.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

kill some more simple submatch() functions, use config_stdsubmatch()

replace the "locdesc_t" structure carrying the number of locators
explicitely by a plain integer array
the length in now known to all relevant parties, so this avoids
duplication of information, and we can allocate that thing in
drivers without hacks

branches: 1.68.2;
Use ANSI function decls and static.

Change the rest of the sysctl subsystem to use const consistently.
The __UNCONST macro is now used only where necessary and the RW macros
are gone. Most of the changes here are consumers of the
sysctl_createv(9) interface that now takes a pair of const pointers
which used not to be.

- const poisoning
- avoid variable shadowing.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

branches: 1.64.2; 1.64.4;
Fix PR#24302. Clear PCI abort and parity errors to give the card a chance at
working. Patch provided by Jean-Luc Wasmer, based on the FreeBSD driver.

nuke trailing whitespace

Add sysctl node hw.tweN.driver_version whose value is FreeBSD's driver version
number for now. This is used by 3ware's FreeBSD version of their CLI to find
controllers and check the driver version.

Add some more stripe sizes observed in the field.
Add "JBOD" to twe_table_unittype[].

branches: 1.60.4; 1.60.6;
Take the modulus of the AEN queue tail number rather than the mask of. Now
the tail pointer advances properly.

a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

twe_ccb_map(): Remove the DEBUG panic case of "unknown" S/G list offset.
In all likelihood, this is a command passed from userspace management
tools where no S/G list is needed because no data is being passed.

Double the time we wait for the attention bit following a soft reset (and make
the timeout message just a bit clearer), as the latest firmware appears to be
a bit slower.
OK from Jason Thorpe.

Rename twe_tweio_command_handler() to twe_ccb_wait_handler() and expose it.

Assign a syslog priority to the AEN codes and use that priority when
logging the error message. Potentially allows critical messages to be
noticed much more quickly.

branches: 1.54.2;
When performing command pass-through for management tools, don't poll
for CCB completion. Instead, sleep, and use a CCB callback to wake the
sleeper.

Correct the size passed to a malloc() call when performing command
passthrough for userland management tools.

Remove some assigned-to but otherwise unused variables.

Fix up the TWEIO_COMMAND code to actually work. The 3ware management API
library can now communicate with the card.

- Fix a bug I introduced in a previous commit (oops).
- Add the twe_drivecommand ioctl structure.

- Make CCB allocation slightly more efficient by changing how the
CCB is returned to the caller.
- Make code paths that can use twe_ccb_alloc_wait() use it, and assert
that a CCB is always returned from that function.
- Assert that a CCB is always returned when allocating the reserved CCB
for an AEN fetch.

Add a comment clarifying why we clear TWEF_AEN in twe_reset() now.

Separate the AEN fetching path into its own special path that uses the
reserved CCB. This means that all remaining callers of twe_param_get*()
are called from a valid thread context, and thus have no need to use a
reserved CCB. This will allow for further cleanup in a future commit.

Add support for dynamically attaching and detaching RAID array units.

Improve AEN handling:
- Make AENs use the generic code table stuff.
- Add a few more AEN codes (from FreeBSD).
- Correct the context of a few AEN codes (some were listed as
"unit context" when they're really "port context").
- Add a queue of AENs that management tools in userspace can poll
(from FreeBSD).

Fetch info about the drives during attach, and inject that info
into the msgbuf using aprint_verbose().

Expose the "param get" functions.

- Record more information about the array unit, including array
type and stripe depth.
- Report array type and stripe depth when attaching the logical drive.

Add some helper routines to fetch 1, 2, and 4 byte parameter values.

Modeled after code in FreeBSD.

Add some additional code -> description tables, and add a generic
routine to translate code -> description. AENs will be converted
to this mechanism in a future commit.

Partially from FreeBSD.

tweioctl(): store the result of twe_param_get() directly to the right
variable rather than using (void *) temporary
should fix strict aliasing warning of gcc 3.3

print some additional information about the controller on boot (from FreeBSD)

use aprint_* as appropriate
change some debug #ifdef DIAGNOSTIC messages into #ifdef DEBUG
make aenfmt[] more const
change twe_param_get() signature to take (struct twe_param **) last arg, and
remove now unnecessary casts

branches: 1.37.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Use aprint_normal() in cfprint routines.

Remove comparison of u_int8_t value to (512 - a few bytes), since it's
always false. As found by gcc-current.

Add /dev/twex support. To be used with FreeBSD's 3dmd.
Initial port from Masaru OKI <oki@netbsd.org>, with KNF, memory leak fixes,
denial of service problems, and null pointer fixes from me.

Avoid strict-alias warnings.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.

Missing comma in aenfmt array initialization.

Add missing messages from FreeBSD's driver. Re-organize a bit how the
message is formatted and printed.

SIMPLEQ rototill:
- implement SIMPLEQ_REMOVE(head, elm, type, field). whilst it's O(n),
this mirrors the functionality of SLIST_REMOVE() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE()
- remove the unnecessary elm arg from SIMPLEQ_REMOVE_HEAD().
this mirrors the functionality of SLIST_REMOVE_HEAD() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE_HEAD()
- remove notes about SIMPLEQ not supporting arbitrary element removal
- use SIMPLEQ_FOREACH() instead of home-grown for loops
- use SIMPLEQ_EMPTY() appropriately
- use SIMPLEQ_*() instead of accessing sqh_first,sqh_last,sqe_next directly
- reorder manual page; be consistent about how the types are listed
- other minor cleanups

NBPG is not constant on the sparc, so don't use CPP tricks.

Deal with the NBPG problem in a better way.

branches: 1.22.2;
- Use write barriers.
- NBPG -> PAGE_SIZE.

branches: 1.21.8;
add RCSID

branches: 1.20.4;
Back out previous - it causes panics.

Use bus_dma to get temporary I/O buffers.

Spell 'occurred' with two 'r's.

a whole bunch of changes to improve performance and robustness under load:

- remove special treatment of pager_map mappings in pmaps. this is
required now, since I've removed the globals that expose the address range.
pager_map now uses pmap_kenter_pa() instead of pmap_enter(), so there's
no longer any need to special-case it.
- eliminate struct uvm_vnode by moving its fields into struct vnode.
- rewrite the pageout path. the pager is now responsible for handling the
high-level requests instead of only getting control after a bunch of work
has already been done on its behalf. this will allow us to UBCify LFS,
which needs tighter control over its pages than other filesystems do.
writing a page to disk no longer requires making it read-only, which
allows us to write wired pages without causing all kinds of havoc.
- use a new PG_PAGEOUT flag to indicate that a page should be freed
on behalf of the pagedaemon when it's unlocked. this flag is very similar
to PG_RELEASED, but unlike PG_RELEASED, PG_PAGEOUT can be cleared if the
pageout fails due to eg. an indirect-block buffer being locked.
this allows us to remove the "version" field from struct vm_page,
and together with shrinking "loan_count" from 32 bits to 16,
struct vm_page is now 4 bytes smaller.
- no longer use PG_RELEASED for swap-backed pages. if the page is busy
because it's being paged out, we can't release the swap slot to be
reallocated until that write is complete, but unlike with vnodes we
don't keep a count of in-progress writes so there's no good way to
know when the write is done. instead, when we need to free a busy
swap-backed page, just sleep until we can get it busy ourselves.
- implement a fast-path for extending writes which allows us to avoid
zeroing new pages. this substantially reduces cpu usage.
- encapsulate the data used by the genfs code in a struct genfs_node,
which must be the first element of the filesystem-specific vnode data
for filesystems which use genfs_{get,put}pages().
- eliminate many of the UVM pagerops, since they aren't needed anymore
now that the pager "put" operation is a higher-level operation.
- enhance the genfs code to allow NFS to use the genfs_{get,put}pages
instead of a modified copy.
- clean up struct vnode by removing all the fields that used to be used by
the vfs_cluster.c code (which we don't use anymore with UBC).
- remove kmem_object and mb_object since they were useless.
instead of allocating pages to these objects, we now just allocate
pages with no object. such pages are mapped in the kernel until they
are freed, so we can use the mapping to find the page to free it.
this allows us to remove splvm() protection in several places.

The sum of all these changes improves write throughput on my
decstation 5000/200 to within 1% of the rate of NetBSD 1.5
and reduces the elapsed time for "make release" of a NetBSD 1.5
source tree on my 128MB pc to 10% less than a 1.5 kernel took.

branches: 1.16.2;
Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.15.2;
Reduce the delay when polling so that dumps go faster.

AEN 0x000c appears to mean `init started'. From lukem.

Add BUS_DMA_STREAMING to data transfer maps.

branches: 1.12.2;
Don't choke when we get lots of AENs all at once.

Wait 10x longer for status bits.

Match an upcoming product.

Oops, be sure to clear the ATTN interrupt on error.

opt_twe.h isn't needed any more.

- Complain if interrupt-driven retrieval of AENs fails somehow.
- Clamp the number of outstanding commands to 129.
- Other tweaks.

splimp() -> splvm()

Change pci_intr_map to get interrupt source information from a "struct
pci_attach_args *" instead of from four separate parameters which in
all cases were extracted from the same "struct pci_attach_args".

This both simplifies the driver api, and allows for alternate PCI
interrupt mapping schemes, such as one using the tables described in
the Intel Multiprocessor Spec which describe interrupt wirings for
devices behind pci-pci bridges based on the device's location rather
the bridge's location.

Tested on alpha and i386; welcome to 1.5Q

branches: 1.4.2;
NBPG -> PAGE_SIZE

- Pull in some updates from FreeBSD - mainly clarifications. Thanks to
Mike Smith <msmith@freebsd.org> for pointing these out.
- Ensure that we get AENs: reserve one CCB/command block for parameter
retrieval, and chain AEN retrievals that are the result of an interrupt.

- tsleep()/wakeup_one() will hurt when under load, so use a queue instead.
- Don't copy to or from the aligned buffer unless there's a need to.

Driver for the 3ware Escalade family of RAID controllers.

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

use pci_intr_establish_xname() everywhere

branches: 1.106.6; 1.106.14; 1.106.16;
Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

branches: 1.105.2;
KNF. No functional change.

KNF. Remove extra spaces. No functional change.

branches: 1.103.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.102.2;
make pci_intr_string and eisa_intr_string take a buffer and a length
instead of relying in local static storage.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

Remove unused variable

branches: 1.98.2;
fix device/softc split: initialize sc->sc_dev.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.96.6;
extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

branches: 1.95.2; 1.95.6;
dependant -> dependent

Explicitly get rid of constness.

branches: 1.93.2;
Avoid pointless use of a sysctl definition, CTL_NAMES. Clean up whitespace.

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

printf() size_t with 'z' format modifier in debug code.

branches: 1.90.2; 1.90.4;
use device_private().
"looks good" ad@
XXX for the device_t/softc split, please check the driver that no cases have been missed.

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

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

branches: 1.87.12;
Replace device_lookup() with device_lookup_private() on getting softc
for future device_t/softc spilt.

branches: 1.86.2;
Remove clause 3 and 4 from TNF licenses

branches: 1.85.2; 1.85.4;
use aprint_*_dev and device_xname

branches: 1.84.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.83.2; 1.83.14; 1.83.16; 1.83.20;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.82.2;
Change kauth(9) KPI for kauth_authorize_device_passthru() to add another
argument, u_long, serving as a bit-mask of generic requests for the
passthru request.

Discussed on tech-security@ and tech-kern@. Okay tls@.

branches: 1.81.2;
__unused removal on arguments; approved by core.

Replace securelevel checks with kauth(9) calls.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.78.2; 1.78.4;
- add missing initializer
- add missing function decl

Initialize a variable to 0 to appease gcc4 with -O3.

Acting as Elad's keyboard:

Place the securelevel checks in their logical locations.
This will be clearer in the future when code changes to use kauth(9) calls.

input and okay ad@

Coverity ID 2859: Don't leak ccb, move the allocation a few lines
lower next to where it'll be used for the first time.

branches: 1.74.2; 1.74.4; 1.74.6;
Fix memory leak in the TWEIO_GET_PARAM ioctl.
Tested by gendalia@.

branches: 1.73.2; 1.73.4;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.72.2;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

kill some more simple submatch() functions, use config_stdsubmatch()

replace the "locdesc_t" structure carrying the number of locators
explicitely by a plain integer array
the length in now known to all relevant parties, so this avoids
duplication of information, and we can allocate that thing in
drivers without hacks

branches: 1.68.2;
Use ANSI function decls and static.

Change the rest of the sysctl subsystem to use const consistently.
The __UNCONST macro is now used only where necessary and the RW macros
are gone. Most of the changes here are consumers of the
sysctl_createv(9) interface that now takes a pair of const pointers
which used not to be.

- const poisoning
- avoid variable shadowing.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

branches: 1.64.2; 1.64.4;
Fix PR#24302. Clear PCI abort and parity errors to give the card a chance at
working. Patch provided by Jean-Luc Wasmer, based on the FreeBSD driver.

nuke trailing whitespace

Add sysctl node hw.tweN.driver_version whose value is FreeBSD's driver version
number for now. This is used by 3ware's FreeBSD version of their CLI to find
controllers and check the driver version.

Add some more stripe sizes observed in the field.
Add "JBOD" to twe_table_unittype[].

branches: 1.60.4; 1.60.6;
Take the modulus of the AEN queue tail number rather than the mask of. Now
the tail pointer advances properly.

a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

twe_ccb_map(): Remove the DEBUG panic case of "unknown" S/G list offset.
In all likelihood, this is a command passed from userspace management
tools where no S/G list is needed because no data is being passed.

Double the time we wait for the attention bit following a soft reset (and make
the timeout message just a bit clearer), as the latest firmware appears to be
a bit slower.
OK from Jason Thorpe.

Rename twe_tweio_command_handler() to twe_ccb_wait_handler() and expose it.

Assign a syslog priority to the AEN codes and use that priority when
logging the error message. Potentially allows critical messages to be
noticed much more quickly.

branches: 1.54.2;
When performing command pass-through for management tools, don't poll
for CCB completion. Instead, sleep, and use a CCB callback to wake the
sleeper.

Correct the size passed to a malloc() call when performing command
passthrough for userland management tools.

Remove some assigned-to but otherwise unused variables.

Fix up the TWEIO_COMMAND code to actually work. The 3ware management API
library can now communicate with the card.

- Fix a bug I introduced in a previous commit (oops).
- Add the twe_drivecommand ioctl structure.

- Make CCB allocation slightly more efficient by changing how the
CCB is returned to the caller.
- Make code paths that can use twe_ccb_alloc_wait() use it, and assert
that a CCB is always returned from that function.
- Assert that a CCB is always returned when allocating the reserved CCB
for an AEN fetch.

Add a comment clarifying why we clear TWEF_AEN in twe_reset() now.

Separate the AEN fetching path into its own special path that uses the
reserved CCB. This means that all remaining callers of twe_param_get*()
are called from a valid thread context, and thus have no need to use a
reserved CCB. This will allow for further cleanup in a future commit.

Add support for dynamically attaching and detaching RAID array units.

Improve AEN handling:
- Make AENs use the generic code table stuff.
- Add a few more AEN codes (from FreeBSD).
- Correct the context of a few AEN codes (some were listed as
"unit context" when they're really "port context").
- Add a queue of AENs that management tools in userspace can poll
(from FreeBSD).

Fetch info about the drives during attach, and inject that info
into the msgbuf using aprint_verbose().

Expose the "param get" functions.

- Record more information about the array unit, including array
type and stripe depth.
- Report array type and stripe depth when attaching the logical drive.

Add some helper routines to fetch 1, 2, and 4 byte parameter values.

Modeled after code in FreeBSD.

Add some additional code -> description tables, and add a generic
routine to translate code -> description. AENs will be converted
to this mechanism in a future commit.

Partially from FreeBSD.

tweioctl(): store the result of twe_param_get() directly to the right
variable rather than using (void *) temporary
should fix strict aliasing warning of gcc 3.3

print some additional information about the controller on boot (from FreeBSD)

use aprint_* as appropriate
change some debug #ifdef DIAGNOSTIC messages into #ifdef DEBUG
make aenfmt[] more const
change twe_param_get() signature to take (struct twe_param **) last arg, and
remove now unnecessary casts

branches: 1.37.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Use aprint_normal() in cfprint routines.

Remove comparison of u_int8_t value to (512 - a few bytes), since it's
always false. As found by gcc-current.

Add /dev/twex support. To be used with FreeBSD's 3dmd.
Initial port from Masaru OKI <oki@netbsd.org>, with KNF, memory leak fixes,
denial of service problems, and null pointer fixes from me.

Avoid strict-alias warnings.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.

Missing comma in aenfmt array initialization.

Add missing messages from FreeBSD's driver. Re-organize a bit how the
message is formatted and printed.

SIMPLEQ rototill:
- implement SIMPLEQ_REMOVE(head, elm, type, field). whilst it's O(n),
this mirrors the functionality of SLIST_REMOVE() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE()
- remove the unnecessary elm arg from SIMPLEQ_REMOVE_HEAD().
this mirrors the functionality of SLIST_REMOVE_HEAD() (the other
singly-linked list type) and FreeBSD's STAILQ_REMOVE_HEAD()
- remove notes about SIMPLEQ not supporting arbitrary element removal
- use SIMPLEQ_FOREACH() instead of home-grown for loops
- use SIMPLEQ_EMPTY() appropriately
- use SIMPLEQ_*() instead of accessing sqh_first,sqh_last,sqe_next directly
- reorder manual page; be consistent about how the types are listed
- other minor cleanups

NBPG is not constant on the sparc, so don't use CPP tricks.

Deal with the NBPG problem in a better way.

branches: 1.22.2;
- Use write barriers.
- NBPG -> PAGE_SIZE.

branches: 1.21.8;
add RCSID

branches: 1.20.4;
Back out previous - it causes panics.