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b556151110
linux-next/arch/powerpc/kernel
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Benjamin Herrenschmidt b556151110 powerpc/pci: Improve detection of unassigned bridge resources 
When the powerpc PCI layer is not configured to re-assign everything,
it currently fails to detect that a PCI to PCI bridge has been left
unassigned by the firmware and tries to allocate resource for the
default window values in the bridge (0...X) (with the notable exception
of a hack we have in there that detects some Apple firmware unassigned
bridge resources).

This results in resource allocation failures, which are generally
fixed up later on but it causes scary warnings in the logs and we
have seen the fixup code fall over in some circumstances (a different
issue to fix as well).

This code improves that by providing a more complete & useful function
to intuit that a bridge was left unassigned by the firmware, and thus
force a full re-allocation by the PCI code without trying to allocate
the existing useless resources first.

The algorithm we use basically considers unassigned a window that
starts at 0 (PCI address) if the corresponding address space enable
bit is not set. In addition, for memory space, it considers such a
resource unassigned also if the host bridge isn't configured to
forward cycles to address 0 (ie, the resource basically overlaps
main memory).

This fixes a range of problems with things like Bare-Metal support
on pSeries machines, or attempt to use partial firmware PCI setup.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-10-15 10:13:29 +11:00
..
vdso32 powerpc: Fixup lwsync at runtime 2008-07-03 16:58:10 +10:00
vdso64 powerpc: Fixup lwsync at runtime 2008-07-03 16:58:10 +10:00
.gitignore powerpc: Ignore generated vmlinux.lds in git 2008-10-07 14:26:18 +11:00
align.c powerpc: Fix uninitialised variable in VSX alignment code 2008-09-03 20:53:14 +10:00
asm-offsets.c POWERPC: Allow 32-bit hashed pgtable code to support 36-bit physical 2008-09-24 16:29:44 -05:00
audit.c [PATCH] audit signal recipients 2007-05-11 05:38:25 -04:00
btext.c powerpc: Use the common ascii hex helpers 2008-08-20 16:34:57 +10:00
clock.c [POWERPC] clk.h interface for platforms 2007-10-03 09:11:56 +10:00
compat_audit.c [PATCH] add SIGNAL syscall class (v3) 2007-05-11 05:38:25 -04:00
cpu_setup_6xx.S [POWERPC] ppc32: Fix errata for 603 CPUs 2008-04-21 15:00:32 -05:00
cpu_setup_44x.S powerpc: Remove use of CONFIG_PPC_MERGE 2008-08-04 13:18:17 +10:00
cpu_setup_pa6t.S [POWERPC] pasemi: Enable one more hid bit 2007-04-24 21:31:49 +10:00
cpu_setup_ppc970.S powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit 2008-09-15 11:08:35 -07:00
cputable.c powerpc: Expose PMCs & cache topology in sysfs on 32-bit 2008-08-20 16:34:58 +10:00
crash_dump.c powerpc: Fix /dev/oldmem interface for kdump 2008-08-20 09:50:21 +10:00
crash.c powerpc: Increase CRASH_HANDLER_MAX 2008-06-30 22:31:00 +10:00
dma-iommu.c powerpc: Drop archdata numa_node 2008-09-24 16:26:43 -05:00
dma.c powerpc: Fix DMA offset for non-coherent DMA 2008-10-14 10:35:26 +11:00
entry_32.S powerpc: Add TIF_NOTIFY_RESUME support for tracehook 2008-07-28 16:30:50 +10:00
entry_64.S powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit 2008-09-15 11:08:35 -07:00
firmware.c
fpu.S powerpc: Add VSX context save/restore, ptrace and signal support 2008-07-01 11:28:50 +10:00
ftrace.c ftrace: store mcount address in rec->ip 2008-06-23 22:10:56 +02:00
head_8xx.S [POWERPC] 8xx: fix swap 2008-03-07 08:42:28 -06:00
head_32.S POWERPC: Allow 32-bit hashed pgtable code to support 36-bit physical 2008-09-24 16:29:44 -05:00
head_40x.S [POWERPC] 40x/Book-E: Save/restore volatile exception registers 2008-06-02 14:56:35 -05:00
head_44x.S powerpc: rework 4xx PTE access and TLB miss 2008-07-09 13:36:17 -04:00
head_64.S powerpc: Make the 64-bit kernel as a position-independent executable 2008-09-15 11:08:38 -07:00
head_booke.h powerpc: rework 4xx PTE access and TLB miss 2008-07-09 13:36:17 -04:00
head_fsl_booke.S powerpc: remove non-dependent load fsl_booke PTE_64BIT 2008-10-13 11:09:59 -05:00
ibmebus.c powerpc/ibmebus: Restore "name" sysfs attribute on ibmebus devices 2008-08-20 09:50:21 +10:00
idle_6xx.S powerpc: Fix for getting CPU number in power_save_ppc32_restore() 2008-09-03 20:53:47 +10:00
idle_e500.S powerpc: Fix for getting CPU number in power_save_ppc32_restore() 2008-09-03 20:53:47 +10:00
idle_power4.S [POWERPC] powermac: Support G5 CPU hotplug 2007-05-07 20:31:13 +10:00
idle.c nohz: prevent tick stop outside of the idle loop 2008-07-18 18:10:28 +02:00
init_task.c [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
io.c ftrace: support for PowerPC 2008-05-23 22:43:11 +02:00
iomap.c [POWERPC] Add 64-bit resources support to pci_iomap 2007-09-20 07:36:52 -05:00
iommu.c powerpc/pseries: iommu enablement for CMO 2008-07-25 15:44:43 +10:00
irq.c powerpc: Make the irq reverse mapping radix tree lockless 2008-09-15 11:08:45 -07:00
isa-bridge.c [POWERPC] Remove leftover printk in isa-bridge.c 2008-05-09 20:22:59 +10:00
kgdb.c kgdb, powerpc: arch specific powerpc kgdb support 2008-07-23 11:30:15 -05:00
kprobes.c kprobes: improve kretprobe scalability with hashed locking 2008-07-25 10:53:30 -07:00
l2cr_6xx.S Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
legacy_serial.c powerpc/powermac: Fixup default serial port device for pmac_zilog 2008-07-28 16:30:53 +10:00
lparcfg.c powerpc: Replace __FUNCTION__ with __func__ 2008-08-20 16:34:57 +10:00
machine_kexec_32.c kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE 2008-08-15 08:35:42 -07:00
machine_kexec_64.c Merge commit 'origin/master' 2008-07-16 11:07:59 +10:00
machine_kexec.c kexec jump 2008-07-26 12:00:04 -07:00
Makefile powerpc: Merge 32 and 64-bit dma code 2008-09-24 16:26:45 -05:00
misc_32.S powerpc: Fix error path in kernel_thread function 2008-10-10 15:55:18 +11:00
misc_64.S powerpc: Fix error path in kernel_thread function 2008-10-10 15:55:18 +11:00
misc.S powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit 2008-09-15 11:08:35 -07:00
module_32.c powerpc: Move common module code into its own file 2008-07-01 11:28:05 +10:00
module_64.c lib: Correct printk %pF to work on all architectures 2008-09-09 11:51:15 -07:00
module.c powerpc: Remove dead module_find_bug code 2008-08-18 14:22:35 +10:00
msi.c [POWERPC] Fix sparse warnings in arch/powerpc/kernel 2008-05-14 22:31:59 +10:00
nvram_64.c [POWERPC] pseries: Eliminate global error_log_cnt variable 2007-08-17 11:01:52 +10:00
of_device.c powerpc: Drop archdata numa_node 2008-09-24 16:26:43 -05:00
of_platform.c powerpc: Add missing reference to coherent_dma_mask 2008-07-08 21:06:35 -07:00
paca.c powerpc: Make the 64-bit kernel as a position-independent executable 2008-09-15 11:08:38 -07:00
pci_32.c powerpc/fsl: Hide MPC5121 pci bridge. 2008-10-13 11:09:58 -05:00
pci_64.c powerpc: Merge 32 and 64-bit dma code 2008-09-24 16:26:45 -05:00
pci_dn.c [POWERPC] iSeries: eliminate pci_dn bussubno 2008-01-17 14:57:05 +11:00
pci-common.c powerpc/pci: Improve detection of unassigned bridge resources 2008-10-15 10:13:29 +11:00
pmc.c [POWERPC] Made FSL Book-E PMC support more generic 2008-02-05 23:34:14 -06:00
ppc32.h powerpc: Add VSX context save/restore, ptrace and signal support 2008-07-01 11:28:50 +10:00
ppc_ksyms.c powerpc: Introduce local (non-broadcast) forms of tlb invalidates 2008-09-24 16:29:40 -05:00
proc_ppc64.c powerpc: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
process.c powerpc: Remove use of CONFIG_PPC_MERGE 2008-08-04 13:18:17 +10:00
prom_init_check.sh [POWERPC] Fix -Os kernel builds with newer gcc versions 2008-06-16 15:00:54 +10:00
prom_init.c powerpc: Sync RPA note in zImage with kernel's RPA note 2008-10-10 15:55:19 +11:00
prom_parse.c powerpc: Fix OF parsing of 64 bits PCI addresses 2008-07-22 10:39:34 +10:00
prom.c powerpc: Make the 64-bit kernel as a position-independent executable 2008-09-15 11:08:38 -07:00
ptrace32.c powerpc: Correctly hookup PTRACE_GET/SETVSRREGS for 32 bit processes 2008-07-30 15:26:54 +10:00
ptrace.c powerpc: Don't use the wrong thread_struct for ptrace get/set VSX regs 2008-07-30 15:26:54 +10:00
reloc_64.S powerpc: Make the 64-bit kernel as a position-independent executable 2008-09-15 11:08:38 -07:00
rtas_flash.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
rtas_pci.c [POWERPC] Fix sparse warnings in arch/powerpc/kernel 2008-05-14 22:31:59 +10:00
rtas-proc.c [POWERPC] Fix sparse warnings in arch/powerpc/kernel 2008-05-14 22:31:59 +10:00
rtas-rtc.c
rtas.c powerpc: Zero fill the return values of rtas argument buffer 2008-08-11 10:09:56 +10:00
setup_32.c powerpc: Reflect the used arguments in machine_init() prototype 2008-10-14 10:35:26 +11:00
setup_64.c powerpc: Make it possible to move the interrupt handlers away from the kernel 2008-09-15 11:08:08 -07:00
setup-common.c powerpc: Fix major revision number for Freescale cores 2008-09-15 11:08:48 -07:00
setup.h
signal_32.c powerpc: fix giveup_vsx to save registers correctly 2008-07-15 12:29:23 +10:00
signal_64.c powerpc: fix giveup_vsx to save registers correctly 2008-07-15 12:29:23 +10:00
signal.c powerpc: Add TIF_NOTIFY_RESUME support for tracehook 2008-07-28 16:30:50 +10:00
signal.h powerpc: Clean up copy_to/from_user for vsx and fpr 2008-07-03 16:58:11 +10:00
smp-tbsync.c [POWERPC] Replace kmalloc+memset with kzalloc 2006-12-04 20:42:09 +11:00
smp.c powerpc/smp: No need to set_need_resched when getting a resched IPI 2008-10-13 16:24:20 +11:00
softemu8xx.c powerpc: Add macros to access floating point registers in thread_struct. 2008-07-01 11:28:43 +10:00
stacktrace.c powerpc: Removed duplicated include in stacktrace.c 2008-07-28 16:30:47 +10:00
suspend.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
swsusp_32.S [POWERPC] Make altivec code in swsusp_32.S depend on CONFIG_ALTIVEC 2007-11-08 14:15:34 +11:00
swsusp_64.c [POWERPC] powermac: Suspend to disk on G5 2007-05-07 20:31:14 +10:00
swsusp_asm64.S powerpc: Fix 64-bit hibernation with 64k pages 2008-10-07 14:26:20 +11:00
swsusp.c powerpc: fixup hard_irq_disable semantics 2007-05-11 08:29:34 -07:00
sys_ppc32.c powerpc: Use sys_pause for 32-bit pause entry point 2008-09-15 11:08:39 -07:00
syscalls.c powerpc/mm: Add Strong Access Ordering support 2008-07-09 16:30:45 +10:00
sysfs.c powerpc: Fix build warnings introduced by PMC support on 32-bit 2008-09-18 17:57:50 -05:00
systbl_chk.c [POWERPC] Fix a couple of copyright symbols 2008-01-25 22:52:50 +11:00
systbl_chk.sh [POWERPC] Fix a couple of copyright symbols 2008-01-25 22:52:50 +11:00
systbl.S [POWERPC] Align the sys_call_table 2007-10-11 14:36:47 +10:00
tau_6xx.c on_each_cpu(): kill unused 'retry' parameter 2008-06-26 11:24:38 +02:00
time.c Merge commit 'origin/master' 2008-07-16 11:07:59 +10:00
traps.c powerpc: BookE hardware watchpoint support 2008-07-25 15:44:39 +10:00
udbg_16550.c [POWERPC] 4xx: Add early udbg support for 40x processors 2007-12-23 13:13:03 -06:00
udbg.c [POWERPC] Mark udbg console as CON_ANYTIME, ie. callable early in boot 2008-04-24 21:08:11 +10:00
vdso.c powerpc: Remove use of CONFIG_PPC_MERGE 2008-08-04 13:18:17 +10:00
vecemu.c
vector.S
vio.c powerpc: Drop archdata numa_node 2008-09-24 16:26:43 -05:00
vmlinux.lds.S powerpc: Sync RPA note in zImage with kernel's RPA note 2008-10-10 15:55:19 +11:00