Inspired by PowerPC XICS interrupt support code.
All IRQs are virtualized in order to keep NR_IRQS from needing
to be too large. Interrupts on sparc64 are arbitrary 11-bit
values, but we don't need to define NR_IRQS to 2048 if we
virtualize the IRQs.
As PCI and SBUS controller drivers build device IRQs, we divy
out virtual IRQ numbers incrementally starting at 1. Zero is
a special virtual IRQ used for the timer interrupt.
So device drivers all see virtual IRQs, and all the normal
interfaces such as request_irq(), enable_irq(), etc. translate
that into a real IRQ number in order to configure the IRQ.
At this point knowledge of the struct ino_bucket is almost
entirely contained within arch/sparc64/kernel/irq.c There are
a few small bits in the PCI controller drivers that need to
be swept away before we can remove ino_bucket's definition
out of asm-sparc64/irq.h and privately into kernel/irq.c
Signed-off-by: David S. Miller <davem@davemloft.net>
And reuse that struct member for virt_irq, which will
be used in future changesets for the implementation of
mapping between real and virtual IRQ numbers.
This nicely kills off a ton of SBUS and PCI controller
PIL assignment code which is no longer necessary.
Signed-off-by: David S. Miller <davem@davemloft.net>
This ugly hack was long overdue to die.
It was a way to print out Sparc interrupts in a more freindly format,
since IRQ numbers were arbitrary opaque 32-bit integers which vectored
into PIL levels. These 32-bit integers were not necessarily in the
0-->NR_IRQS range, but the PILs they vectored to were.
The idea now is that we will increase NR_IRQS a little bit and use a
virtual<-->real IRQ number mapping scheme similar to PowerPC.
That makes this IRQ printing hack irrelevant, and furthermore only a
handful of drivers actually used __irq_itoa() making it even less
useful.
Signed-off-by: David S. Miller <davem@davemloft.net>
Only pil0_dummy_bucket had a pil of zero and we just killed that
off, so we can delete all special case code that used bp->pil==0
as a way to identify a dummy bucket.
Signed-off-by: David S. Miller <davem@davemloft.net>
This is the first in a series of cleanups that will hopefully
allow a seamless attempt at using the generic IRQ handling
infrastructure in the Linux kernel.
Define PIL_DEVICE_IRQ and vector all device interrupts through
there.
Get rid of the ugly pil0_dummy_{bucket,desc}, instead vector
the timer interrupt directly to a specific handler since the
timer interrupt is the only event that will be signaled on
PIL 14.
The irq_worklist is now in the per-cpu trap_block[].
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix the calculation of the end address when flushing iotlb entries to
ram. This bug has been a cause of esp dma errors, and it affects
HyperSPARC systems much worse than SuperSPARC systems.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix the smp related section mismatch warnings by marking the smp init
functions as cpuinit.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix a link failure by adding the missing can_lock macros for the rw
locks.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Setup cpu_possible_map so the secondary cpus will get started.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix a crash in SMP mode by adding the missing topology_init.
Also makes /proc/cpuinfo backwards compatible with 2.4.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
A local debugging change slipped into a previous changeset.
When SCTP_DEBUG is off SCTP_ASSERT should do nothing.
Signed-off-by: David S. Miller <davem@davemloft.net>
Having two or more qdisc_run's contend against each other is bad because
it can induce packet reordering if the packets have to be requeued. It
appears that this is an unintended consequence of relinquinshing the queue
lock while transmitting. That in turn is needed for devices that spend a
lot of time in their transmit routine.
There are no advantages to be had as devices with queues are inherently
single-threaded (the loopback device is not but then it doesn't have a
queue).
Even if you were to add a queue to a parallel virtual device (e.g., bolt
a tbf filter in front of an ipip tunnel device), you would still want to
process the queue in sequence to ensure that the packets are ordered
correctly.
The solution here is to steal a bit from net_device to prevent this.
BTW, as qdisc_restart is no longer used by anyone as a module inside the
kernel (IIRC it used to with netif_wake_queue), I have not exported the
new __qdisc_run function.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Attached patch declares connector init function as subsys_init()
and returns -EAGAIN in case connector is not initialized yet.
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix endless loop in the SCTP match similar to those already fixed in
the SCTP conntrack helper (was CVE-2006-1527).
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
(990). Turns out some ye-olde unices used EUCLEAN as
Filesystem-needs-cleaning, so now we use that too.
SGI-PV: 953954
SGI-Modid: xfs-linux-melb:xfs-kern:26286a
Signed-off-by: Nathan Scott <nathans@sgi.com>
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (51 commits)
[MIPS] Make timer interrupt frequency configurable from kconfig.
[MIPS] Correct HAL2 Kconfig description
[MIPS] Fix R4K cache macro names
[MIPS] Add Missing R4K Cache Macros to IP27 & IP32
[MIPS] Support for the RM9000-based Basler eXcite smart camera platform.
[MIPS] Support for the R5500-based NEC EMMA2RH Mark-eins board
[MIPS] Support SNI RM200C SNI in big endian mode and R5000 processors.
[MIPS] SN: include asm/sn/types.h for nasid_t.
[MIPS] Random fixes for sb1250
[MIPS] Fix bcm1480 compile
[MIPS] Remove support for NEC DDB5476.
[MIPS] Remove support for NEC DDB5074.
[MIPS] Cleanup memory managment initialization.
[MIPS] SN: Declare bridge_pci_ops.
[MIPS] Remove unused function alloc_pci_controller.
[MIPS] IP27: Extract pci_ops into separate file.
[MIPS] IP27: Use symbolic constants instead of magic numbers.
[MIPS] vr41xx: remove unnecessay items from vr41xx/Kconfig.
[MIPS] IP27: Cleanup N/M mode configuration.
[MIPS] IP27: Throw away old unused hacks.
...
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (109 commits)
[ETHTOOL]: Fix UFO typo
[SCTP]: Fix persistent slowdown in sctp when a gap ack consumes rx buffer.
[SCTP]: Send only 1 window update SACK per message.
[SCTP]: Don't do CRC32C checksum over loopback.
[SCTP] Reset rtt_in_progress for the chunk when processing its sack.
[SCTP]: Reject sctp packets with broadcast addresses.
[SCTP]: Limit association max_retrans setting in setsockopt.
[PFKEYV2]: Fix inconsistent typing in struct sadb_x_kmprivate.
[IPV6]: Sum real space for RTAs.
[IRDA]: Use put_unaligned() in irlmp_do_discovery().
[BRIDGE]: Add support for NETIF_F_HW_CSUM devices
[NET]: Add NETIF_F_GEN_CSUM and NETIF_F_ALL_CSUM
[TG3]: Convert to non-LLTX
[TG3]: Remove unnecessary tx_lock
[TCP]: Add tcp_slow_start_after_idle sysctl.
[BNX2]: Update version and reldate
[BNX2]: Use CPU native page size
[BNX2]: Use compressed firmware
[BNX2]: Add firmware decompression
[BNX2]: Allow WoL settings on new 5708 chips
...
Manual fixup for conflict in drivers/net/tulip/winbond-840.c
* 'i915fb' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/intelfb-2.6: (25 commits)
intelfb: fixup clock calculation debugging.
Removed hard coded EDID buffer size.
intelfb: use regular modedb table instead of VESA
intelfb: use firmware EDID for mode database
Revert "intelfb driver -- use the regular modedb table instead of the VESA"
intelfb: int option fix
sync modesetting code with X.org
intelfb: align with changes from my X driver.
intelfb driver -- use the regular modedb table instead of the VESA
Adds support for 256MB aperture on 945 chipsets to the intelfb driver
intelfb -- uses stride alignment of 64 on the 9xx chipsets.
intelfb: some cleanups for intelfbhw
intelfb: fixup pitch calculation like X does
intelfb: fixup p calculation
This patch makes a needlessly global struct static.
intelfb: add i945GM support
intelfb: fixup whitespace..
intelfb: add hw cursor support for i9xx
intelfb: make i915 modeset
intelfb: add support for i945G
...
Trying to suspend/resume with console messages flying all around is
doomed to failure, when the devices that the messages are trying to
go to are being shut down.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
According to the ACPI spec, it should be enabled on return from suspend,
but bugs happen. Apparently especially on the Apple Intel Macs.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Doing a full ata_busy_sleep() seems to get suspend and resume working
fine on the Apple Mac Mini, at least.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This one's quite tricky. The 53c700 uses the now deprecated fields of
the command structure for saving the prior command when it does
autosense. To fix this, we have to add extra fields to the LUN to
accommodate a copy of the real command.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Updates:
- don't bypass SYNCHRONIZE_CACHE command
- return SCSI_MLQUEUE_HOST_BUSY when no free request slots
- move scsi_remove_host() to the begin of hpt_remove(), or it will
not work after resources being released.
Signed-off-by: HighPoint Linux Team <linux@highpoint-tech.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Received from Mark Salyzyn
Spelling correction, orphaned comment removal & update branch name.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Received From Mark Salyzyn
Some of the cards product names changed.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Remove checks for value, since the hotplug core always provides
a valid value.
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Current SHPCHP driver shows device number of slots in info messages,
but it is useless and should be replaced with slot name.
This patch replaces the device number shown in the info messages with
the slot name.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch removes unused hpc_event_lock. This patch has no functional
change.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch cleans up the interrupt polling timer code in
shpchp_hpc.c. This has no functional changes.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch cleans up the code related to issuing SHPC commands. This
patch has no functional changes.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch cleans up the interrupt handler of shpchp driver. This
patch has no functional changes.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch implements .get_address callback of hotplug_slot_ops for
PCIEHP driver. With this patch, we can see bus address of hotplug
slots as follows:
# cat /sys/bus/pci/slots/0010_0000/address
0000:0a:00
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch replaces pci_find_slot() with pci_get_slot() in PCIEHP
driver. This patch enables PCI Express Hotplug on the system which has
multiple PCI domains.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a repost of a patch submitted by Prarit Bhargava on 01-19-06 that
never got integrated.
The get_power_status function is currently reporting a bitwise mapping of
the slot if the slot is powered on. It should return 1 if powered on and
0 if powered off.
Signed-off-by: Mike Habeck <habeck@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The workqueue thread of shpchp driver should be created only when SHPC
based hotplug slots are detected on the system.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Global SERR and Interrupt should be masked at shpchp driver unload time.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Current SHPCHP driver doesn't take care of RsvdP/RsvdZ[*] bits in
controller SERR-INT register. This might cause unpredicable
results. This patch fixes this bug.
[*] RsvdP and RsvdZ are defined in SHPC spec as follows:
RsvdP - Reserved and Preserved. Register bits of this type are
reserved for future use as R/W bits. The value read is
undefined. Writes are ignored. Software must follow These rules
when accessing RsvdP bits:
- Software must ignore RsvdP bits when testing values read
from these registers.
- Software must not depend on RsvdP bit's ability to retain
information when written
- Software must always write back the value read in the RsvdP
bits when writing one of these registers.
RsvdZ - Reserved and Zero. Register bits of this type are reserved
for future use as R/WC bits. The value read is undefined. Writes
are ignored. Software must follow these rules when accessing RsvdZ
bits:
- Software must ignore RsvdZ bits when testing values read
from these registers.
- Software must not depends on a RsvdZ bit's ability to retain
information when written.
- Software must always write 0 to RsvdZ bits when writing one
of these register.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Current SHPCHP driver doesn't take care of RsvdP/RsvdZ[*] bits
in logical slot registers. This might cause unpredicable results. This
patch fixes this bug.
[*] RsvdP and RsvdZ are defined in SHPC spec as follows:
RsvdP - Reserved and Preserved. Register bits of this type are
reserved for future use as R/W bits. The value read is
undefined. Writes are ignored. Software must follow These rules
when accessing RsvdP bits:
- Software must ignore RsvdP bits when testing values read
from these registers.
- Software must not depend on RsvdP bit's ability to retain
information when written
- Software must always write back the value read in the RsvdP
bits when writing one of these registers.
RsvdZ - Reserved and Zero. Register bits of this type are reserved
for future use as R/WC bits. The value read is undefined. Writes
are ignored. Software must follow these rules when accessing RsvdZ
bits:
- Software must ignore RsvdZ bits when testing values read
from these registers.
- Software must not depends on a RsvdZ bit's ability to retain
information when written.
- Software must always write 0 to RsvdZ bits when writing one
of these register.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David S. Miller
Bob Breuer
David S. Miller
Herbert Xu
Evgeniy Polyakov
Patrick McHardy
Nathan Scott
Linus Torvalds
James Bottomley
HighPoint Linux Team
Mark Haverkamp
Jan Beulich
Eric Sesterhenn
Kenji Kaneshige
Mike Habeck