CVS log for src/sys/arch/pmax/pmax/bus_dma.c

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Keyword substitution: kv
Default branch: MAIN

s/functin/function/ in copy pasted comment.

Ensure bus_dmatag_subregion is called with an inclusive max_addr
everywhere.

Trailing whitespace

s/invlid/invalid/ in comment.

Sync w/ HEAD.

malloc(9) -> kmem(9)

update from HEAD

Sync with HEAD

Resolve conflicts from previous merge (all resulting from $NetBSD
keywork expansion)

Fix debug (make it compile)

Sync with HEAD

Add struct pmap_limits and pm_{min,max}addr from uvm/pmap/map.h and use it to
store avail_start, avail_end, virtual_start, and virtual_end.
Remove iospace and let emips just bump pmap_limits.virtual_start to get the
VA space it needs.
pmap_segtab.c is almost identical to uvm/pmap/pmap_segtab.c now.  It won't
be long until we switch to the uvm/pmap one.

Resync to 2012-11-19 00:00:00 UTC

sync with head

move common/bus_dma/ -> dev/bus_dma/

Cleanu <machine/*> includes

Sync with HEAD.

sync with head

Sync with HEAD

Merge forward from matt-nb5-mips64.
New interrupt code.
mips64 support for DS5000/260.

Adapt to the new spl/interrupt framework.
Include <mips/locore.h> when needed.

sync with head

Update to reflect mips tree changes.

Merge from matt-nb5-mips64
Merge mips-specific arch files.

sync with head

Fixup (all but mipsco) to deal the new realities in mipsland.

Use bus_dmamem_common.

sync with head.

KNF, ANSIfy, and misc cosmetics.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

Sync w/ -current. 34 merge conflicts to follow.

sync with head.

Sync with HEAD.

Also fix build.

vm_page: put TAILQ_ENTRY into a union with LIST_ENTRY, so we can use both.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with head.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head

sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

Sync with head.

sync with head - hopefully this will work

Mising -> Mixing

merge yamt-uio_vmspace branch.

- use vmspace rather than proc or lwp where appropriate.
  the latter is more natural to specify an address space.
  (and less likely to be abused for random purposes.)
- fix a swdmover race.

fix a typo.

adapt the rest of MD code.

merge ktrace-lwp.

Sync with head.

sync with head.

bus_dmamem_map: honour BUS_DMA_NOWAIT.  noted by Manuel Bouyer.
bus_space_map: always do NOWAIT allocation as it used to be before yamt-km.

we have too many copies!

sync with -current

Sync with HEAD.

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.

sync with head.  xen and whitespace.  xen part is not finished.

Add a dm_maxsegsz public member to bus_dmamap_t.  This allows a user of the API
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create).  dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.

Don't deref a NULL struct lwp *. This shouldn't happen, but...

convert arch/pmax to new apis.

Sync with HEAD.

bus_dmamap_load_mbuf(): Skip zero-length mbufs.
kern/24811

Fix the sync with head I botched.

Sync with HEAD.

Correct a few comment typos that have propagated through the
tree.

Sync with HEAD

__KERNEL_RCSID()

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

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 PAGE_SIZE rather than NBPG.

catch up with -current.

Whitespace.

Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).

catch up with -current on kqueue branch

Catch up to -current.

move initialization of the "struct pglist" returned by uvm_pglistalloc()
from the calling code into uvm_pglistalloc() itself for consistency
and easier error handling

Sync kqueue branch with -current.

Catch up to -current.

lwp'ify

file bus_dma.c was added on branch nathanw_sa on 2001-12-15 07:11:00 +0000

Merge the thorpej-mips-cache branch onto the trunk.  This is an
overhaul of how caches are handled for NetBSD's MIPS ports.

Fix typo in comment.

For the virtually-indexed write-back cache dmamap_sync:

Note that we can only use Inv on PREREAD if the buffer
start/end are cacheline-aligned.  If they're not, we
need to use WB_Inv, otherwise we can end up trashing
someone else's data.

XXX For now, simply use WB_Inv for the PREREAD case
always.  I will make some other changes later that
will enable the dmamap_sync routine to easily determine
if it's safe to use Inv.

Many thanks to Michael Hitch for tracking this down.

Pass KSEG0 address to R3000-style cacheops.

Update for the new cache code.  There are now two optimized
bus_dmamap_sync routines: one for a physically-indexed write-through
cache, and one for a virtually-indexed write-back cache.

Catch up with -current.

don't depend on other headers to include sys/proc.h for us.

Update the kqueue branch to HEAD.

Update pmap_update to now take the updated pmap as an argument.
This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.

Currently this is a no-op on most platforms, so they should see no difference.

Reviewed by Jason.

b{cmp,copy,zero} -> mem{cmp,cpy,set}
Also remove some unnecessary argument casts.

Catch up to -current.

replace vm_page_t with struct vm_page *.

Sprinkle pmap_update() calls after calls to:
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).

These calls are relatively conservative.  It may be possible to
optimize these a little more.

Catch up with -current.

Sync with HEAD.

s/vm_page_alloc_memory/uvm_pglistalloc/ in panic message.

Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.

Pullup 1.25 and 1.26 [tsutsui]:
Add some #ifdef MIPS3's to allow compiling a MIPS1 only configuration.

Redo the previous change to save MIPS1 only configuration.  It's
uncertain whether a multiple page flush with a single HitFlush()
call is safe.

- Hide MachHitFlushDCache() symbol by enclosing #ifdef MIPS3 to make
compilable with MIPS1 only configuration.
- MIPS3 virtually addressed cache op can do its work in a single call for
range of address space.

Pull up rev 1.24 [approved by thorpej].

Need to use MachHitFlushDCache() for the MIPS3 to ensure invalidating
both the primary and the secondary caches.  MachFlushDCache() will not
invalidate the correct secondary cache lines for KSEG2 addresses.
R4000 systems should now be able to boot and run.

Need to use MachHitFlushDCache() for the MIPS3 to ensure invalidating
both the primary and the secondary caches.  MachFlushDCache() will not
invalidate the correct secondary cache lines for KSEG2 addresses.
R4000 systems should now be able to boot and run.

Pull up mmap paddr_t/off_t changes from trunk.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

remove/move more mach vm header files:

	<vm/pglist.h> -> <uvm/uvm_pglist.h>
	<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
	<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
	<vm/vm_object.h> -> nothing
	<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes.  Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

Remove unneeded include files (up to 16 in two files!).

The clean-up continues:
 - Make local-only function and variables static.
 - Move function prototypes and extern variable declarations to
   header files.
 - Delete unused variables.
There's still a handful of extern declaraions that should be fixed up.

Function prototype cleanup.

Pull up to last week's -current.

Merge w/ recent changes in main trunk.

Sync with -current

Update for pmap_enter() API change.  No functional difference.

Sync. w/ main trunk.

eliminate the PMAP_NEW option by making it required for all ports.
ports which previously had no support for PMAP_NEW now implement
the pmap_k* interfaces as wrappers around the non-k versions.

sync to head rev. 1.15 (pmap_extract() interface change)

Update from trunk.

Change the pmap_extract() interface to:
	boolean_t pmap_extract(pmap_t, vaddr_t, paddr_t *);
This makes it possible for the pmap to map physical address 0.

Sync w/ -current.

- Track main trunk changes and cleanup accumulated bozos I made so far.

bus_dmamem_map() maps DMA safe memory, which is usually one or more
managed pages, into KVA space.  Since the pages are managed, we should
use pmap_enter(), not pmap_kenter_pa().

Also, when entering the mappings, enter with an access_type of
VM_PROT_READ | VM_PROT_WRITE.  We do this for a couple of reasons:

	(1) On systems that have H/W mod/ref attributes, the hardware
	    may not be able to track mod/ref done by a bus master.

	(2) On systems that have to do mod/ref emulation, this prevents
	    a mod/ref page fault from potentially happening while in an
	    interrupt context, which can be problematic.

This latter change is fairly important if we ever want to be able to
transfer DMA-safe memory pages to anonymous memory objects; we will need
to know that the pages are modified, or else data could be lost!

Note that while the pages are unowned (i.e. "just DMA-safe memory pages"),
they won't consume any swap resources, as the mappings are wired, and
the pages aren't on the active or inactive queues.

sync with trunk revs 1.11 (UVM removal) and 1.13 (pmap_enter arg change)

Changes for modified pmap_enter() API:
* Map the message buffer with access_type = VM_PROT_READ|VM_PROT_WRITE `just
  because'.
* Map the file system buffers with access_type = VM_PROT_READ|VM_PROT_WRITE to
  avoid possible problems with pagemove().
* Do not use VM_PROT_EXEC with either of the above.
* Map pages for /dev/mem with access_type = prot.  Also, DO NOT use
  pmap_kenter() for this, as we DO NOT want to lose modification information.
* Map pages in dumpsys() with VM_PROT_READ.
* Map pages in m68k mappedcopyin()/mappedcopyout() and writeback() with
  access_type = prot.
* For now, bus_dma*(), pmap_map(), vmapbuf(), and similar functions still use
  access_type = 0.  This should probably be revisited.

Remove trailing whitespace.

completely remove Mach VM support.  all that is left is the all the
header files as UVM still uses (most of) these.

- Complete vm_offset_t purge for DECstation.

- Replace vm_offset_t with vaddr_t/paddr_t.
Note that NetBSD/newsmips has purged vm_offset_t too.  Main trunk mips/
and pmax/ directories is left untouched.

- Reflect new internals.

Make bus_dmamap_load_uio() work, from Kevin Lahey <kml@nas.nasa.gov>.

Implement bus_dmamap_load_uio().

Adjust bus_dmamap_sync() for the R4000; in that case, use the stashed
virtual address for the segment, rather than the physical address, and
adjust the cache call appropriately.

Fill in the virtual address of each DMA segment as we load the map.

Sync w/ i386 port.

Ouch, key debugging printfs off BUS_DMA_DEBUG, not DEBUG ... noisy!

A few fixes to make it really work.

Rewrite at least the R{2,3}000 case for bus_dmamap_sync(), in hopes of
making performance of bus_dma drivers not completely suck on the DECstation.

XXX R4000 case is still abysmal, because some other data structure
modification is required to deal with the virtually-indexed R4000 cache.

Complete from-scratch rewrite of the DECstation bus.h, brining it
up-to-date with the current API, and implementing preliminary
support for bus_dma.