Commit Graph

82 Commits

Author SHA1 Message Date
Russ Anderson 5a51467b14 x86/uv: Fix uv_gpa_to_soc_phys_ram() shift
uv_gpa_to_soc_phys_ram() was inadvertently ignoring the
shift values.  This fix takes the shift into account.

Signed-off-by: Russ Anderson <rja@sgi.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/20120119020753.GA7228@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-01-26 10:58:27 +01:00
Cliff Wickman b54bd9be35 x86/UV2: Add accounting for BAU strong nacks
This patch adds separate accounting of UV2 message "strong
nack's" in the BAU statistics.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120116212238.GF5767@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-01-17 09:09:59 +01:00
Cliff Wickman c5d35d399e x86/UV2: Work around BAU bug
This patch implements a workaround for a UV2 hardware bug.
The bug is a non-atomic update of a memory-mapped register. When
hardware message delivery and software message acknowledge occur
simultaneously the pending message acknowledge for the arriving
message may be lost.  This causes the sender's message status to
stay busy.

Part of the workaround is to not acknowledge a completed message
until it is verified that no other message is actually using the
resource that is mistakenly recorded in the completed message.

Part of the workaround is to test for long elapsed time in such
a busy condition, then handle it by using a spare sending
descriptor. The stay-busy condition is eventually timed out by
hardware, and then the original sending descriptor can be
re-used. Most of that logic change is in keeping track of the
current descriptor and the state of the spares.

The occurrences of the workaround are added to the BAU
statistics.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120116211947.GC5767@sgi.com
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-01-17 09:09:54 +01:00
Cliff Wickman da87c937e5 x86/UV2: Fix new UV2 hardware by using native UV2 broadcast mode
Update the use of the Broadcast Assist Unit on SGI Altix UV2 to
the use of native UV2 mode on new hardware (not the legacy mode).

UV2 native mode has a different format for a broadcast message.
We also need quick differentiaton between UV1 and UV2.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120116211750.GA5767@sgi.com
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-01-17 09:09:51 +01:00
Jack Steiner b495e039b4 x86, UV: Fix UV2 hub part number
There was a mixup when the SGI UV2 hub chip was sent to be
fabricated, and it ended up with the wrong part number in the
HRP_NODE_ID mmr. Future versions of the chip will (may) have the
correct part number. Change the UV infrastructure to recognize
both part numbers as valid IDs of a UV2 hub chip.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20111129210058.GA20452@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05 11:49:52 +01:00
Linus Torvalds d630ba565f Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: uv2: Workaround for UV2 Hub bug (system global address format)
2011-10-28 05:43:56 -07:00
Jack Steiner 6a469e4665 x86: uv2: Workaround for UV2 Hub bug (system global address format)
This is a workaround for a UV2 hub bug that affects the format of system
global addresses.

The GRU API for UV2 was inadvertently broken by a hardware change.  The
format of the physical address used for TLB dropins and for addresses used
with instructions running in unmapped mode has changed.  This change was
not documented and became apparent only when diags failed running on
system simulators.

For UV1, TLB and GRU instruction physical addresses are identical to
socket physical addresses (although high NASID bits must be OR'ed into the
address).

For UV2, socket physical addresses need to be converted.  The NODE portion
of the physical address needs to be shifted so that the low bit is in bit
39 or bit 40, depending on an MMR value.

It is not yet clear if this bug will be fixed in a silicon respin.  If it
is fixed, the hub revision will be incremented & the workaround disabled.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-21 11:23:15 +02:00
Jeremy Fitzhardinge 8b8bc2f731 x86: Use xadd helper more widely
This covers the trivial cases from open-coded xadd to the xadd macros.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Link: http://lkml.kernel.org/r/4E5BCC40.3030501@goop.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-08-29 13:44:12 -07:00
cpw@sgi.com ae90c232be x86, UV: Correct UV2 BAU destination timeout
Correct the UV2 broacast assist unit's destination timeout
period. And the activation status register in UV2 should be
tested for a destination timeout with a 4, not a 2.  The values
for Active versus Timeout were reversed.

This patch is critical for TLB shootdown on an Altix UV2 system
(i.e. the follow-on to the current Altix UV).

 Destination timeout period:
  The period is set in 4 bits of memory-mapped register MISC_CONTROL.
  The left bit toggles base period between 10us and 80us.
  The other 3 bits are the multiplier.
 Decimal 15, hex f, gives the maximum: 7 * 80us

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20110621122243.117324443@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-06-21 14:50:34 +02:00
cpw@sgi.com 442d392492 x86, UV: Remove cpumask_t from the stack
Remove the large stack-resident cpumask_t from
reset_with_ipi()'s stack by allocating one per uvhub.

Due to the limited size of the stack the potentially huge cpumask_t may
cause stack overrun.  We haven't seen it happen yet, but we need to make it
a practice not to push such structures onto the stack.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Link: http://lkml.kernel.org/r/20110621122242.832589130@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-06-21 14:50:33 +02:00
cpw@sgi.com a456eaab87 x86, UV: Rename hubmask to pnmask
Rename 'bau_targ_hubmask' to 'pnmask' for clarity.

The BAU distribution bit mask is indexed by pnode number, not hub or
blade number.  This important fact is not clear while the mask is
called a 'hubmask'.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20110621122242.630995969@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-06-21 14:50:32 +02:00
cpw@sgi.com b18fb2c04a x86, UV: Inline header file functions
Make all the functions in uv_bau.h inline so that it can
be included in the fake prom (used in simulations).

If not inlined the unused functions will generate compiler warnings.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Link: http://lkml.kernel.org/r/20110621122242.230529678@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-06-21 14:50:31 +02:00
Jack Steiner 55ba412028 x86, UV: Clean up uv_mmrs.h
No code changes. Reformat definitions to make it more readable.

I fixed alignment of comments in the structure definitions.

Also aligned comments and most field definitions & values. Also
sorted the defines for the SHIFT & MASK values for each MMR.
This make the file visually much more acceptable.

Some of the symbol names are still quite long. The file is based
on post-processing of verilog definitions that are used for the
node controller chip design. Although some symbol names are not
what I would chose, I would like to maintain compatibility with
the names used by the chip designers. We have a number of
cross-reference utilities & having common names is important.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20110527145256.GA31224@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
--
 arch/x86/include/asm/uv/uv_mmrs.h | 2873 +++++++++++++++++++++-----------------
 1 file changed, 1600 insertions(+), 1273 deletions(-)
2011-05-30 11:08:48 +02:00
Cliff Wickman f073cc8f39 x86, UV: Clean up uv_tlb.c
SGI UV's uv_tlb.c driver has become rather hard to read, with overly large
functions, non-standard coding style and (way) too long variable, constant
and function names and non-obvious code flow sequences.

This patch improves the readability and maintainability of the driver
significantly, by doing the following strict code cleanups with no side
effects:

 - Split long functions into shorter logical functions.

 - Shortened some variable and structure member names.

 - Added special functions for reads and writes of MMR regs with
   very long names.

 - Added the 'tunables' table to shortened tunables_write().

 - Added the 'stat_description' table to shorten uv_ptc_proc_write().

 - Pass fewer 'stat' arguments where it can be derived from the 'bcp'
   argument.

 - Function definitions consistent on one line, and inline in few (short) cases.

 - Moved some small structures and an atomic inline function to the header file.

 - Moved some local variables to the blocks where they are used.

 - Updated the copyright date.

 - Shortened uv_write_global_mmr64() etc. using some aliasing; no
   line breaks. Renamed many uv_.. functions that are not exported.

 - Aligned structure fields.
    [ note that not all structures are aligned the same way though; I'd like
      to keep the extensive commenting in some of them. ]

 - Shortened some long structure names.

 - Standard pass/fail exit from init_per_cpu()

 - Vertical alignment for mass initializations.

 - More separation between blocks of code.

Tested on a 16-processor Altix UV.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: penberg@kernel.org
Link: http://lkml.kernel.org/r/E1QOw12-0004MN-Lp@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-05-25 14:20:14 +02:00
Jack Steiner 2a919596c1 x86, UV: Add support for SGI UV2 hub chip
This patch adds support for a new version of the SGI UV hub
chip. The hub chip is the node controller that connects multiple
blades into a larger coherent SSI.

For the most part, UV2 is compatible with UV1. The majority of
the changes are in the addresses of MMRs and in a few cases, the
contents of MMRs. These changes are the result in changes in the
system topology such as node configuration, processor types,
maximum nodes, physical address sizes, etc.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20110511175028.GA18006@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-05-25 14:20:13 +02:00
Cliff Wickman 77ed23f8d9 x86: Fix UV BAU for non-consecutive nasids
This is a fix for the SGI Altix-UV Broadcast Assist Unit code,
which is used for TLB flushing.

Certain hardware configurations (that customers are ordering)
cause nasids (numa address space id's) to be non-consecutive.
Specifically, once you have more than 4 blades in a IRU
(Individual Rack Unit - or 1/2 rack) but less than the maximum
of 16, the nasid numbering becomes non-consecutive.  This
currently results in a 'catastrophic error' (CATERR) detected by
the firmware during OS boot.  The BAU is generating an 'INTD'
request that is targeting a non-existent nasid value. Such
configurations may also occur when a blade is configured off
because of hardware errors. (There is one UV hub per blade.)

This patch is required to support such configurations.

The problem with the tlb_uv.c code is that is using the
consecutive hub numbers as indices to the BAU distribution bit
map. These are simply the ordinal position of the hub or blade
within its partition.  It should be using physical node numbers
(pnodes), which correspond to the physical nasid values. Use of
the hub number only works as long as the nasids in the partition
are consecutive and increase with a stride of 1.

This patch changes the index to be the pnode number, thus
allowing nasids to be non-consecutive.
It also provides a table in local memory for each cpu to
translate target cpu number to target pnode and nasid.
And it improves naming to properly reflect 'node' and 'uvhub'
versus 'nasid'.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/E1QJmxX-0002Mz-Fk@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-05-12 23:45:42 +02:00
Jack Steiner 1d44e8288a x86, UV: Fix NMI handler for UV platforms
This fixes problems seen on UV systems handling NMIs from the
node controller.

I isolated the "dazed..." messages that I saw earlier to a bug in
the BMC on our platform. It was sending NMIs w/o properly setting
a register that indicated the source of NMI.

So rather than _assuming_ any unhandled NMI came from the UV system
maintenance console (SMC), add a check to verify that the SMC actually
sent the NMI.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: gorcunov@gmail.com
Cc: dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-05-10 09:26:55 +02:00
Cliff Wickman 5471262290 x86, UV: Initialize the broadcast assist unit base destination node id properly
The BAU's initialization of the broadcast description header is
lacking the coherence domain (high bits) in the nasid.  This
causes a catastrophic system failure when running on a system
with multiple coherence domains.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
LKML-Reference: <E1PxKBB-0005F0-3U@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-09 16:36:16 +01:00
Cliff Wickman cfa60917f0 x86, UV, BAU: Extend for more than 16 cpus per socket
Fix a hard-coded limit of a maximum of 16 cpu's per socket.

The UV Broadcast Assist Unit code initializes by scanning the
cpu topology of the system and assigning a master cpu for each
socket and UV hub. That scan had an assumption of a limit of 16
cpus per socket. With Westmere we are going over that limit.
The UV hub hardware will allow up to 32.

If the scan finds the system has gone over that limit it returns
an error and we print a warning and fall back to doing TLB
shootdowns without the BAU.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: <stable@kernel.org> # .37.x
LKML-Reference: <E1PZol7-0000mM-77@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-03 20:35:03 +01:00
Dimitri Sivanich 8191c9f692 x86: UV: Address interrupt/IO port operation conflict
This patch for SGI UV systems addresses a problem whereby
interrupt transactions being looped back from a local IOH,
through the hub to a local CPU can (erroneously) conflict with
IO port operations and other transactions.

To workaound this we set a high bit in the APIC IDs used for
interrupts. This bit appears to be ignored by the sockets, but
it avoids the conflict in the hub.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
LKML-Reference: <20101116222352.GA8155@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
___

 arch/x86/include/asm/uv/uv_hub.h   |    4 ++++
 arch/x86/include/asm/uv/uv_mmrs.h  |   19 ++++++++++++++++++-
 arch/x86/kernel/apic/x2apic_uv_x.c |   25 +++++++++++++++++++++++--
 arch/x86/platform/uv/tlb_uv.c      |    2 +-
 arch/x86/platform/uv/uv_time.c     |    4 +++-
 5 files changed, 49 insertions(+), 5 deletions(-)
2010-11-18 10:41:25 +01:00
Jack Steiner 62b0cfc240 x86, UV: Update node controller MMRs
A new version of the SGI UV hub node controller is being
developed. A few of the MMRs (control registers) that exist on
the current hub no longer exist on the new hub. Fortunately,
there are alternate MMRs that are are functionally equivalent
and that exist on both hubs.

This patch changes the UV code to use MMRs that exist in BOTH
versions of the hub node controller.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20101106204056.GA27584@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-10 10:06:38 +01:00
Russ Anderson c8f730b1ab x86, uv: Enable Westmere support on SGI UV
Enable Westmere support on SGI UV.  The UV initialization code is dependent on
the APICID bits.  Westmere-EX uses different APIC bit mapping than Nehalem-EX.
This code reads the apic shift value from a UV MMR to do the proper bit
decoding to determint the pnode.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20101026212728.GB15071@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-26 15:15:28 -07:00
Cliff Wickman f6d8a56693 x86, UV: Modularize BAU send and wait
Streamline the large uv_flush_send_and_wait() function by use of
a couple of helper functions.

And remove some excess comments.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004ay-IH@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:48 +02:00
Cliff Wickman 450a007eeb x86, UV: BAU broadcast to the local hub
Make the Broadcast Assist Unit driver use the BAU for TLB
shootdowns of cpu's on the local uvhub.

It was previously thought that IPI might be faster to the cpu's
on the local hub.  But the IPI operation would have to follow
the completion of the BAU broadcast anyway.  So we broadcast to
the local uvhub in all cases except when the current cpu was the
only local cpu in the mask.

This simplifies uv_flush_send_and_wait() in that it returns
either all shootdowns complete, or none.

Adjust the statistics to account for shootdowns on the local
uvhub.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004aq-G7@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:48 +02:00
Cliff Wickman 90cc7d9449 x86, UV: Remove BAU check for stay-busy
Remove a faulty assumption that a long running BAU request has
encountered a hardware problem and will never finish.

Numalink congestion can make a request appear to have
encountered such a problem, but it is not safe to cancel the
request.  If such a cancel is done but a reply is later received
we can miss a TLB shootdown.

We depend upon the max_bau_concurrent 'throttle' to prevent the
stay-busy case from happening.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004ad-BV@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:47 +02:00
Cliff Wickman 4faca15508 x86, UV: BAU structure rearranging
Move some structure definitions from the C code to the BAU
header file, and change the organization of that header file a
little.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004aI-54@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:45 +02:00
Cliff Wickman 712157aa70 x86, UV: Shorten access to BAU statistics structure
Use a pointer from the per-cpu BAU control structure to the
per-cpu BAU statistics structure.
We nearly always know the first before needing the second.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004aB-2k@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:45 +02:00
Cliff Wickman 50fb55acc5 x86, UV: Disable BAU on network congestion
The numalink network can become so congested that TLB shootdown
using the Broadcast Assist Unit becomes slower than using IPI's.

In that case, disable the use of the BAU for a period of time.
The period is tunable.  When the period expires the use of the
BAU is re-enabled. A count of these actions is added to the
statistics file.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNy-0004a4-0a@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:45 +02:00
Cliff Wickman e8e5e8a804 x86, UV: BAU tunables into a debugfs file
Make the Broadcast Assist Unit driver's nine tuning values variable by
making them accessible through a read/write debugfs file.

The file will normally be mounted as
/sys/kernel/debug/sgi_uv/bau_tunables. The tunables are kept in each
cpu's per-cpu BAU structure.

The patch also does a little name improvement, and corrects the reset of
two destination timeout counters.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNx-0004Zx-Uo@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:44 +02:00
Cliff Wickman 12a6611fa1 x86, UV: Calculate BAU destination timeout
Calculate the Broadcast Assist Unit's destination timeout period from the
values in the relevant MMR's.

Store it in each cpu's per-cpu BAU structure so that a destination
timeout can be differentiated from a 'plugged' situation in which all
software ack resources are already allocated and a timeout is pending.
That case returns an immediate destination error.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: gregkh@suse.de
LKML-Reference: <E1OJvNx-0004Zq-RK@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-08 21:13:44 +02:00
Randy Dunlap a289cc7c70 x86, UV: uv_irq.c: Fix all sparse warnings
Fix all sparse warnings in building uv_irq.c.

 arch/x86/kernel/uv_irq.c:46:17: warning: symbol 'uv_irq_chip' was not declared. Should it be static?
 arch/x86/kernel/uv_irq.c:143:50: error: no identifier for function argument
 arch/x86/kernel/uv_irq.c:162:13: error: typename in expression
 arch/x86/kernel/uv_irq.c:162:13: error: undefined identifier 'restrict'
 arch/x86/kernel/uv_irq.c:250:44: error: no identifier for function argument
 arch/x86/kernel/uv_irq.c:260:17: error: typename in expression
 arch/x86/kernel/uv_irq.c:260:17: error: undefined identifier 'restrict'
 arch/x86/kernel/uv_irq.c:233:50: warning: incorrect type in argument 3 (different signedness)
 arch/x86/kernel/uv_irq.c:233:50:    expected int *pnode
 arch/x86/kernel/uv_irq.c:233:50:    got unsigned int *<noident>
 arch/x86/include/asm/uv/uv_hub.h:318:44: warning: incorrect type in argument 2 (different address spaces)
 arch/x86/include/asm/uv/uv_hub.h:318:44:    expected void volatile [noderef] <asn:2>*addr
 arch/x86/include/asm/uv/uv_hub.h:318:44:    got unsigned long *

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Cliff Wickman <cpw@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100416175142.f4b59683.randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-17 10:37:20 +02:00
Cliff Wickman b8f7fb13d2 x86, UV: Improve BAU performance and error recovery
- increase performance of the interrupt handler

- release timed-out software acknowledge resources

- recover from continuous-busy status due to a hardware issue

- add a 'throttle' to keep a uvhub from sending more than a
  specified number of broadcasts concurrently (work around the hardware issue)

- provide a 'nobau' boot command line option

- rename 'pnode' and 'node' to 'uvhub' (the 'node' terminology
  is ambiguous)

- add some new statistics about the scope of broadcasts, retries, the
  hardware issue and the 'throttle'

- split off new function uv_bau_retry_msg() from
  uv_bau_process_message() per community coding style feedback.

- simplify the argument list to uv_bau_process_message(), per
  community coding style feedback.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: linux-mm@kvack.org
Cc: Jack Steiner <steiner@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Mike Travis <travis@sgi.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <E1O25Z4-0004Ur-PB@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-04-14 18:49:53 +02:00
Jack Steiner 6f4edd69e4 x86, UV: Clean up UV headers for MMR definitions
Update UV mmr definitions header file. Eliminate definitions no
longer needed. Move 2 definitions from tlb_uv.c into the header
file where they belong.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100310204458.GA28835@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-11 14:11:26 +01:00
Linus Torvalds 30ff056c42 Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, uv: Remove recursion in uv_heartbeat_enable()
  x86, uv: uv_global_gru_mmr_address() macro fix
  x86, uv: Add serial number parameter to uv_bios_get_sn_info()
2010-02-28 11:00:55 -08:00
Russ Anderson 78c0617646 x86: Enable NMI on all cpus on UV
Enable NMI on all cpus in UV system and add an NMI handler
to dump_stack on each cpu.

By default on x86 all the cpus except the boot cpu have NMI
masked off.  This patch enables NMI on all cpus in UV system
and adds an NMI handler to dump_stack on each cpu.  This
way if a system hangs we can NMI the machine and get a
backtrace from all the cpus.

Version 2: Use x86_platform driver mechanism for nmi init, per
           Ingo's suggestion.

Version 3: Clean up Ingo's nits.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20100226164912.GA24439@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-02-27 12:34:21 +01:00
Mike Travis 841582ea9e x86, uv: Update UV arch to target Legacy VGA I/O correctly.
Add function to direct Legacy VGA I/O traffic to correct I/O Hub.

Signed-off-by: Mike Travis <travis@sgi.com>
LKML-Reference: <201002022238.o12McEbi018727@imap1.linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-02-05 14:05:41 -08:00
Jack Steiner 7a1110e861 x86, uv: Add function retrieving node controller revision number
Add function for determining the revision id of the SGI UV
node controller chip (HUB). This function is needed in a
subsequent patch.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100112210904.GA24546@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-15 11:08:55 -08:00
Jack Steiner e1e0138d7d x86, uv: uv_global_gru_mmr_address() macro fix
Fix bug in uv_global_gru_mmr_address macro.  Macro failed
to cast an int value to a long prior to a left shift > 32.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100107161240.GA2610@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-07 11:49:57 -08:00
Mike Travis 39d3077099 x86: SGI UV: Fix writes to led registers on remote uv hubs
The wrong address was being used to write the SCIR led regs on
remote hubs.  Also, there was an inconsistency between how BIOS
and the kernel indexed these regs.  Standardize on using the
lower 6 bits of the APIC ID as the index.

This patch fixes the problem of writing to an errant address to
a cpu # >= 64.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Jack Steiner <steiner@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@kernel.org
LKML-Reference: <4B3922F9.3060905@sgi.com>
[ v2: fix a number of annoying checkpatch artifacts and whitespace noise ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-29 06:47:39 +01:00
Russ Anderson b76365a18f x86, uv: Add serial number parameter to uv_bios_get_sn_info()
Add system_serial_number to the information returned by
uv_bios_get_sn_info() UV BIOS call.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20091217165323.GA30774@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-17 11:33:51 -08:00
Jack Steiner 56abcf24ff gru: function to generate chipset IPI values
Create a function to generate the value that is written to the UV hub MMR
to cause an IPI interrupt to be sent.  The function will be used in the
GRU message queue error recovery code that sends IPIs to nodes in remote
partitions.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:17 -08:00
Robin Holt c2c9f11574 x86: uv: update XPC to handle updated BIOS interface
The UV BIOS has moved the location of some of their pointers to the
"partition reserved page" from memory into a uv hub MMR.  The GRU does not
support bcopy operations from MMR space so we need to special case the MMR
addresses using VLOAD operations.

Additionally, the BIOS call for registering a message queue watchlist has
removed the 'blade' value and eliminated the structure that was being
passed in.  This is also reflected in this patch.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:14 -08:00
Robin Holt fae419f2ab x86: uv: introduce uv_gpa_is_mmr
Provide a mechanism for determining if a global physical address is
pointing to a UV hub MMR.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:13 -08:00
Robin Holt 729d69e699 x86: uv: introduce a means to translate from gpa -> socket_paddr
The UV BIOS has been updated to implement some of our interface
functionality differently than originally expected.  These patches update
the kernel to the bios implementation and include a few minor bug fixes
which prevent us from doing significant testing on real hardware.

This patch:

For SGI UV systems, translate from a global physical address back to a
socket physical address.  This does nothing to ensure the socket physical
address is actually addressable by the kernel.  That is the responsibility
of the user of the function.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:13 -08:00
Jiri Kosina d014d04386 Merge branch 'for-next' into for-linus
Conflicts:

	kernel/irq/chip.c
2009-12-07 18:36:35 +01:00
Linus Torvalds a77d2e081b Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits)
  x86, apic: Enable lapic nmi watchdog on AMD Family 11h
  x86: Remove unnecessary mdelay() from cpu_disable_common()
  x86, ioapic: Document another case when level irq is seen as an edge
  x86, ioapic: Fix the EOI register detection mechanism
  x86, io-apic: Move the effort of clearing remoteIRR explicitly before migrating the irq
  x86: SGI UV: Map low MMR ranges
  x86: apic: Print out SRAT table APIC id in hex
  x86: Re-get cfg_new in case reuse/move irq_desc
  x86: apic: Remove not needed #ifdef
  x86: io-apic: IO-APIC MMIO should not fail on resource insertion
  x86: Remove asm/apicnum.h
  x86: apic: Do not use stacked physid_mask_t
  x86, apic: Get rid of apicid_to_cpu_present assign on 64-bit
  x86, ioapic: Use snrpintf while set names for IO-APIC resourses
  x86, apic: Use PAGE_SIZE instead of numbers
  x86: Remove local_irq_enable()/local_irq_disable() in fixup_irqs()
  x86: Use EOI register in io-apic on intel platforms
  x86: Force irq complete move during cpu offline
  x86: Remove move_cleanup_count from irq_cfg
  x86, intr-remap: Avoid irq_chip mask/unmask in fixup_irqs() for intr-remapping
  ...
2009-12-05 15:31:25 -08:00
André Goddard Rosa af901ca181 tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:55 +01:00
Robin Holt 02dd0a0613 x86, UV: Set DELIVERY_MODE=4 for vector=NMI_VECTOR in uv_hub_send_ipi()
When sending a NMI_VECTOR IPI using the UV_HUB_IPI_INT register,
we need to ensure the delivery mode field of that register has
NMI delivery selected.

This makes those IPIs true NMIs, instead of flat IPIs. It
matters to reboot sequences and KGDB, both of which use NMI
IPIs.

Signed-off-by: Robin Holt <holt@sgi.com>
Acked-by: Jack Steiner <steiner@sgi.com>
Cc: Martin Hicks <mort@sgi.com>
Cc: <stable@kernel.org>
LKML-Reference: <20091020193620.877322000@alcatraz.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-21 13:31:13 +02:00
Robin Holt 1d21e6e3ff x86, UV: Fix and clean up bau code to use uv_gpa_to_pnode()
Create an inline function to extract the pnode from a global
physical address and then convert the broadcast assist unit to
use the newly created uv_gpa_to_pnode function.

The open-coded code was wrong as well - it might explain a
few of our unexplained bau hangs.

Signed-off-by: Robin Holt <holt@sgi.com>
Acked-by: Cliff Whickman <cpw@sgi.com>
Cc: linux-mm@kvack.org
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20091016112920.GZ8903@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-16 14:51:53 +02:00
Dimitri Sivanich 9338ad6ffb x86, apic: Move SGI UV functionality out of generic IO-APIC code
Move UV specific functionality out of the generic IO-APIC code.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
LKML-Reference: <20091013203236.GD20543@sgi.com>
[ Cleaned up the code some more in their new places. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-14 09:17:09 +02:00