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History log of /src/sys/arch/alpha/pci/pci_kn8ae.c
RevisionDateAuthorComments
 1.34  04-Jul-2021  thorpej Remove unnecessary #include <sys/malloc.h>
 1.33  19-Jun-2021  thorpej Don't use a bunch of switch() statements in the core logic drivers to select
the PCI interrupt initialization routine. Instead, register said routines
by systype in a link set, and look them up and invoke them in a new function
alpha_pci_intr_init().
 1.32  19-Jun-2021  thorpej Remove the "first" argument from pci_kn8ae_pickintr(), instead using
a real once control in that function. Removes a needless divergence from
other "pickintr" routines.
 1.31  25-Sep-2020  thorpej branches: 1.31.6;
Changes to make interrupt {,dis}establish MP-safe on Alpha:
- Protect all of the system interrupt linkage with the cpu_lock mutex.
- Re-order some of the stores to the SCB vector table to make it safe
in the face of lockless interrupt dispatch.
- Add a framework for routing interrupts to specific CPUs. Interrupts
are still funneled only to the primary CPU, but that will change for
some systems soon. Ensure that interrupt handler lists are manipulated
only on the CPUs that handle that specific interrupt source. This required
a re-factor of the alpha_shared_intr_*() family of functions.
- Enable __HAVE_INTR_CONTROL, although interrupt redistribution is still
a no-op.
- Reduce code duplication in the Jenson direct-SCB interrupt handlers.
 1.30  22-Sep-2020  thorpej Changes to make MPSAFE interrupts work on Alpha:

- Remove the ipl argument to scb_set() and the associated array of
"mpsafe" booleans initialized based on the ipl. It was bogus
anyway; all IPL_{BIO,NET,TTY}, etc. values are aliases of IPL_VM,
and for all practical purposes, there is really only one device
interrrupt level on Alpha anyway. Intead, we now treat all dispatches
from the SCB vector table as MP-safe, and it is now the handler for
that vector who is responsible for acquiring the KERNEL_LOCK if needed.

- Update the direct interrupt vector handlers in jensenio and TURBOchannel
to acquire the KERNEL_LOCK.

- Introduce a new ALPHA_INTR_MPSAFE flag, and add a flags argument to
alpha_shared_intr_establish(). When it is set, indicate that the
handler is MP-safe. Update alpha_shared_intr_dispatch() to pay
attention and acquire the KERNEL_LOCK (or not) as indicated.

- Re-factor all of the PCI interrupt handling, providing "generic PCI"
"PCI interrupts through ISA IRQs" implementations to significantly
reduce code duplication. Supplement the PCI chipset tag with more
info to facilitate this, and make the PCI interrupt-related routines
take a pci_chipset_tag_t argument rather than a void * argument.

- Because PCI interrupts on KN8AE are dispatched directly from the
SCB, provide a wrapper for non-MPSAFE interrupt handlers that
acquires the KERNEL_LOCK.

- Change the pci_intr_handle_t type to be a struct rather than an
integer type in order to catch any direct use of it as a value.
Add a set of functions to interact with pci_intr_handle_t, including
setting interrupt flags.

- Implement pci_intr_setattr() so that the PCI_INTR_MPSAFE attribute
can be set on a pci_intr_handle_t.

- While I'm here, make all of the MI PCI back-end operations call
through real functions rather than hopping directly through function
pointers in the chipset tag.

This change looks a lot bigger than it really is because of the re-factor
in the plethora of model-specific PCI interrupt back-ends. The KN8AE,
KN300, and T2/T3/T4 (Sable) are largely un-changed.
 1.29  21-Mar-2014  christos gc sprintf; reduce local static usage of interrupt strings that are only
used once for autoconf printing.
 1.28  04-Nov-2013  christos mark variables used
 1.27  06-Feb-2012  matt branches: 1.27.6; 1.27.10;
Do a minor cleanup of alpha (this will make applying pullups post branching
easier).
u_int{8,16,32,64}_t -> uint{*}_t
Change all old-style definitions to C89 prototypes.
Whitespace cleanup.
Constification in db_disasm.c
 1.26  04-Apr-2011  dyoung branches: 1.26.4; 1.26.8;
Neither pci_dma64_available(), pci_probe_device(), pci_mapreg_map(9),
pci_find_rom(), pci_intr_map(9), pci_enumerate_bus(), nor the match
predicate passed to pciide_compat_intr_establish() should ever modify
their pci_attach_args argument, so make their pci_attach_args arguments
const and deal with the fallout throughout the kernel.

For the most part, these changes add a 'const' where there was no
'const' before, however, some drivers and MD code used to modify
pci_attach_args. Now those drivers either copy their pci_attach_args
and modify the copy, or refrain from modifying pci_attach_args:

Xen: according to Manuel Bouyer, writing to pci_attach_args in
pci_intr_map() was a leftover from Xen 2. Probably a bug. I
stopped writing it. I have not tested this change.

siside(4): sis_hostbr_match() needlessly wrote to pci_attach_args.
Probably a bug. I use a temporary variable. I have not tested this
change.

slide(4): sl82c105_chip_map() overwrote the caller's pci_attach_args.
Probably a bug. Use a local pci_attach_args. I have not tested
this change.

viaide(4): via_sata_chip_map() and via_sata_chip_map_new() overwrote the
caller's pci_attach_args. Probably a bug. Make a local copy of the
caller's pci_attach_args and modify the copy. I have not tested
this change.

While I'm here, make pci_mapreg_submap() static.

With these changes in place, I have tested the compilation of these
kernels:

alpha GENERIC
amd64 GENERIC XEN3_DOM0
arc GENERIC
atari HADES MILAN-PCIIDE
bebox GENERIC
cats GENERIC
cobalt GENERIC
evbarm-eb NSLU2
evbarm-el ADI_BRH ARMADILLO9 CP3100 GEMINI GEMINI_MASTER GEMINI_SLAVE GUMSTIX
HDL_G IMX31LITE INTEGRATOR IQ31244 IQ80310 IQ80321 IXDP425 IXM1200
KUROBOX_PRO LUBBOCK MARVELL_NAS NAPPI SHEEVAPLUG SMDK2800 TEAMASA_NPWR
TEAMASA_NPWR_FC TS7200 TWINTAIL ZAO425
evbmips-el AP30 DBAU1500 DBAU1550 MALTA MERAKI MTX-1 OMSAL400 RB153 WGT624V3
evbmips64-el XLSATX
evbppc EV64260 MPC8536DS MPC8548CDS OPENBLOCKS200 OPENBLOCKS266
OPENBLOCKS266_OPT P2020RDB PMPPC RB800 WALNUT
hp700 GENERIC
i386 ALL XEN3_DOM0 XEN3_DOMU
ibmnws GENERIC
macppc GENERIC
mvmeppc GENERIC
netwinder GENERIC
ofppc GENERIC
prep GENERIC
sandpoint GENERIC
sgimips GENERIC32_IP2x
sparc GENERIC_SUN4U KRUPS
sparc64 GENERIC

As of Sun Apr 3 15:26:26 CDT 2011, I could not compile these kernels
with or without my patches in place:

### evbmips-el GDIUM

nbmake: nbmake: don't know how to make /home/dyoung/pristine-nbsd/src/sys/arch/mips/mips/softintr.c. Stop

### evbarm-el MPCSA_GENERIC
src/sys/arch/evbarm/conf/MPCSA_GENERIC:318: ds1672rtc*: unknown device `ds1672rtc'

### ia64 GENERIC

/tmp/genassym.28085/assym.c: In function 'f111':
/tmp/genassym.28085/assym.c:67: error: invalid application of 'sizeof' to incomplete type 'struct pcb'
/tmp/genassym.28085/assym.c:76: error: dereferencing pointer to incomplete type

### sgimips GENERIC32_IP3x

crmfb.o: In function `crmfb_attach':
crmfb.c:(.text+0x2304): undefined reference to `ddc_read_edid'
crmfb.c:(.text+0x2304): relocation truncated to fit: R_MIPS_26 against `ddc_read_edid'
crmfb.c:(.text+0x234c): undefined reference to `edid_parse'
crmfb.c:(.text+0x234c): relocation truncated to fit: R_MIPS_26 against `edid_parse'
crmfb.c:(.text+0x2354): undefined reference to `edid_print'
crmfb.c:(.text+0x2354): relocation truncated to fit: R_MIPS_26 against `edid_print'
 1.25  15-Dec-2010  matt branches: 1.25.2;
Remove unneeded includes of <uvm/uvm_extern.h>
 1.24  14-Mar-2009  dsl branches: 1.24.4;
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.
 1.23  14-Mar-2009  dsl Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)
 1.22  14-Mar-2009  dsl Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.
 1.21  15-May-2002  thorpej branches: 1.21.116; 1.21.124; 1.21.130;
Rename alpha_pci_decompose_tag() to pci_decompose_tag(). There *is*
some MI PCI code that uses it, and soon there will be more. (The rationale
for not making it available previously was that it could be mis-used, but
that's true of a lot of things.)
 1.20  13-Aug-2001  mjacob branches: 1.20.2;
Fixed the one minor buglet that kept 8200s from working
(SCB_VECTOIDX(vec) - SCB_IOVECBASE] -> SCB_VECTOIDX(vec - SCB_IOVECBASE))

Sigh. This is all very good work- this new interrupt stuff. Yet like the
last time my good friend Jason 'simplified' things, we lost information.
It used to be you could tell which specific slot an interrupt was frame
based upon the vector. Now you can't because they're allocated dynamically.
Oh well- it's not all that important.
 1.19  27-Jul-2001  thorpej Rework the interrupt code, shaving some cycles off in the process.
Rather than an "iointr" routine that decomposes a vector into an
IRQ, we maintain a vector table directly, hooking up each "iointr"
routine at the correct vector. This also allows us to hook device
interrupts up to specific vectors (c.f. Jensen).

We can shave even more cycles off, here, and I will, but it requires
some changes to the alpha_shared_intr stuff.
 1.18  28-Dec-2000  sommerfeld branches: 1.18.4;
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
 1.17  29-Jun-2000  mrg remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>
 1.16  05-Jun-2000  thorpej Switch to the new `evcnt' mechanism for counting interrupts. Maintain
a per-CPU interrupt counter for clock, device, and interprocessor
interrupts.
 1.15  04-Jun-2000  cgd Implement the more flexiable `evcnt' interface as discussed (briefly) on
tech-kern and now documented in evcnt(9).
 1.14  12-Feb-1999  thorpej branches: 1.14.8; 1.14.16;
Fix printf format problems on Alpha.
 1.13  25-Apr-1998  thorpej Fix some whitespace lossage.
 1.12  24-Apr-1998  mjacob fix minor typo
 1.11  18-Apr-1998  thorpej Initialize the PCI IDE compat interrupt PCI method to NULL; PCI IDE
compat interrupts are not currently supported on these platforms.
 1.10  16-Apr-1998  thorpej Make function names in printfs and panics consistent.
 1.9  15-Apr-1998  mjacob spurious interrupt notification and finally adding vmstat -i support
 1.8  23-Mar-1998  mjacob Slightly restructure interrupt handling to accomodate the addition
of a dwlpx_iointr vector.
 1.7  02-Sep-1997  thorpej Nuke the idea of <machine/options.h>. It completely defeats the purpose
of fine-grain option dependencies.
 1.6  19-Jul-1997  cgd branches: 1.6.2;
don't expect/provide pci_decompose_tag to be a MI, public function. It
wasn't intended to be to begin with, and uses of it (e.g. the one in the
'de' driver) are quite likely to be incorrect.
 1.5  24-Jun-1997  mjacob Turn of 'unclaimed interrupt' messages- we know about them already- we can't
really fix this as yet.
 1.4  07-Apr-1997  cgd branches: 1.4.2;
by default, provide RCS IDs for NetBSD/alpha kernel files in kernel binaries.
This can be disabled (to save a bit of space) with the NO_KERNEL_RCSIDS
options, which is present but commented out in the ALPHA config file.
In ELF-format kernels, these strings are present in the kernel binary but
are not loaded into memory. (In ECOFF-format kernels, there's no easy way
to keep them from being loaded, so they _are_ loaded into memory.)
 1.3  07-Apr-1997  cgd clean up NetBSD RCS ID strings, include machine/options.h
 1.2  12-Mar-1997  cgd Copyright notice consistency, per Matthew Jacob.
 1.1  12-Mar-1997  cgd AlphaServer 8200 & 8400 support, including CPU specific details, TurboLaser
system bus support, and KFTxx support. From Matthew Jacob, NASA Ames
Research Center.
 1.4.2.3  22-Jul-1997  cgd sync nwscons branch with changes in -current as of July 21, 1997
 1.4.2.2  01-Jun-1997  cgd sync the nwscons branch up with yesterday's version of the trunk.
Lots of conflicts/changes because of the RCS Id format changes.
Also, a few cleanups and corrections.
 1.4.2.1  07-Apr-1997  cgd file pci_kn8ae.c was added on branch alpha-nwscons on 1997-06-01 04:13:35 +0000
 1.6.2.1  04-Sep-1997  thorpej Update marc-pcmcia branch from trunk.
 1.14.16.1  22-Jun-2000  minoura Sync w/ netbsd-1-5-base.
 1.14.8.2  05-Jan-2001  bouyer Sync with HEAD
 1.14.8.1  20-Nov-2000  bouyer 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.
 1.18.4.3  23-Jun-2002  jdolecek catch up with -current on kqueue branch
 1.18.4.2  25-Aug-2001  thorpej Merge Aug 24 -current into the kqueue branch.
 1.18.4.1  03-Aug-2001  lukem update to -current
 1.20.2.2  20-Jun-2002  nathanw Catch up to -current.
 1.20.2.1  13-Aug-2001  nathanw file pci_kn8ae.c was added on branch nathanw_sa on 2002-06-20 03:37:45 +0000
 1.21.130.1  13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.21.124.1  28-Apr-2009  skrll Sync with HEAD.
 1.21.116.1  04-May-2009  yamt sync with head.
 1.24.4.2  21-Apr-2011  rmind sync with head
 1.24.4.1  05-Mar-2011  rmind sync with head
 1.25.2.1  06-Jun-2011  jruoho Sync with HEAD.
 1.26.8.1  18-Feb-2012  mrg merge to -current.
 1.26.4.2  22-May-2014  yamt sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
 1.26.4.1  17-Apr-2012  yamt sync with head
 1.27.10.1  18-May-2014  rmind sync with head
 1.27.6.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.31.6.1  01-Aug-2021  thorpej Sync with HEAD.

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