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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU Updates from Joerg Roedel:
"Besides some fixes and cleanups in the code there are three more
important changes to point out this time:
* New IOMMU driver for the ARM SHMOBILE platform
* An IOMMU-API extension for non-paging IOMMUs (required for
upcoming PAMU driver)
* Rework of the way the Tegra IOMMU driver accesses its
registetrs - register windows are easier to extend now.
There are also a few changes to non-iommu code, but that is acked by
the respective maintainers."
* tag 'iommu-updates-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (23 commits)
iommu/tegra: assume CONFIG_OF in SMMU driver
iommu/tegra: assume CONFIG_OF in gart driver
iommu/amd: Remove redundant NULL check before dma_ops_domain_free().
iommu/amd: Initialize device table after dma_ops
iommu/vt-d: Zero out allocated memory in dmar_enable_qi
iommu/tegra: smmu: Fix incorrect mask for regbase
iommu/exynos: Make exynos_sysmmu_disable static
ARM: mach-shmobile: r8a7740: Add IPMMU device
ARM: mach-shmobile: sh73a0: Add IPMMU device
ARM: mach-shmobile: sh7372: Add IPMMU device
iommu/shmobile: Add iommu driver for Renesas IPMMU modules
iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
iommu: Add domain window handling functions
iommu: Implement DOMAIN_ATTR_PAGING attribute
iommu: Check for valid pgsize_bitmap in iommu_map/unmap
iommu: Make sure DOMAIN_ATTR_MAX is really the maximum
iommu/tegra: smmu: Change SMMU's dependency on ARCH_TEGRA
iommu/tegra: smmu: Use helper function to check for valid register offset
iommu/tegra: smmu: Support variable MMIO ranges/blocks
iommu/tegra: Add missing spinlock initialization
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'arm/shmobile', 'arm/exynos', 'x86/vt-d' and 'x86/amd' into next
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This removes System MMU initialization from arch/arm/mach-exynos/
to move them to DT and the exynos-iommu driver except gating clock
definitions.
Signed-off-by: KyongHo Cho <pullip.cho@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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This patch adds an IPMMU device and notifies the IPMMU driver which
devices are connected via the IPMMU module. All devices connected to the main
memory bus via the IPMMU module MUST be registered when SHMOBILE_IPMMU and
SHMOBILE_IOMMU are enabled because physical address cannot be used
while the IPMMU module's MMU function is enabled.
Signed-off-by: Hideki EIRAKU <hdk@igel.co.jp>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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This patch adds an IPMMU device and notifies the IPMMU driver which
devices are connected via the IPMMU module. All devices connected to the main
memory bus via the IPMMU module MUST be registered when SHMOBILE_IPMMU and
SHMOBILE_IOMMU are enabled because physical address cannot be used
while the IPMMU module's MMU function is enabled.
Signed-off-by: Hideki EIRAKU <hdk@igel.co.jp>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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This patch adds an IPMMU device and notifies the IPMMU driver which
devices are connected via the IPMMU module. All devices connected to the main
memory bus via the IPMMU module MUST be registered when SHMOBILE_IPMMU and
SHMOBILE_IOMMU are enabled because physical address cannot be used
while the IPMMU module's MMU function is enabled.
Signed-off-by: Hideki EIRAKU <hdk@igel.co.jp>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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git://git.linaro.org/people/mszyprowski/linux-dma-mapping
Pull DMA-mapping updates from Marek Szyprowski:
"This time all patches are related only to ARM DMA-mapping subsystem.
The main extension provided by this pull request is highmem support.
Besides that it contains a bunch of small bugfixes and cleanups."
* 'for-v3.9' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
ARM: DMA-mapping: fix memory leak in IOMMU dma-mapping implementation
ARM: dma-mapping: Add maximum alignment order for dma iommu buffers
ARM: dma-mapping: use himem for DMA buffers for IOMMU-mapped devices
ARM: dma-mapping: add support for CMA regions placed in highmem zone
arm: dma mapping: export arm iommu functions
ARM: dma-mapping: Add arm_iommu_detach_device()
ARM: dma-mapping: Add macro to_dma_iommu_mapping()
ARM: dma-mapping: Set arm_dma_set_mask() for iommu->set_dma_mask()
ARM: iommu: Include linux/kref.h in asm/dma-iommu.h
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This patch removes page_address() usage in IOMMU-aware dma-mapping
implementation and replaced it with direct use of the cpu virtual address
provided by the caller. page_address() returned incorrect address for
pages remapped in atomic pool, what caused memory leak.
Reported-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Hiroshi Doyu <hdoyu@nvidia.com>
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Alignment order for a dma iommu buffer is set by buffer size. For
large buffer, it is a waste of iommu address space. So configurable
parameter to limit maximum alignment order can reduce the waste.
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin.park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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IOMMU can provide access to any memory page, so there is no point in
limiting the allocated pages only to lowmem, once other parts of
dma-mapping subsystem correctly supports himem pages.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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This patch adds missing pieces to correctly support memory pages served
from CMA regions placed in high memory zones. Please note that the default
global CMA area is still put into lowmem and is limited by optional
architecture specific DMA zone. One can however put device specific CMA
regions in high memory zone to reduce lowmem usage.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
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This patch adds EXPORT_SYMBOL_GPL calls to the three arm iommu
functions - arm_iommu_create_mapping, arm_iommu_free_mapping
and arm_iommu_attach_device. These three functions are arm specific
wrapper functions for creating/freeing/using an iommu mapping and
they are called by various drivers. If any of these drivers need
to be built as dynamic modules, these functions need to be exported.
Changelog v2: using EXPORT_SYMBOL_GPL as suggested by Marek.
Signed-off-by: Prathyush K <prathyush.k@samsung.com>
[m.szyprowski: extended with recently introduced
EXPORT_SYMBOL_GPL(arm_iommu_detach_device)]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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A counter part of arm_iommu_attach_device().
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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This can be built without CONFIG_ARM_DMA_USE_IOMMU.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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struct dma_map_ops iommu_ops doesn't have ->set_dma_mask, which causes
crash when dma_set_mask() is called from some driver.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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The dma_iommu_mapping structure defined in asm/dma-iommu.h embeds a
struct kref, include the appropriate header file.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Pull GPIO changes from Grant Likely:
"This branch contains the usual set of individual driver improvements
and bug fixes, as well as updates to the core code. The more notable
changes include:
- Internally add new API for referencing GPIOs by gpio_desc instead
of number. Eventually this will become a public API
- ACPI GPIO binding support"
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (33 commits)
arm64: select ARCH_WANT_OPTIONAL_GPIOLIB
gpio: em: Use irq_domain_add_simple() to fix runtime error
gpio: using common order: let 'static const' instead of 'const static'
gpio/vt8500: memory cleanup missing
gpiolib: Fix locking on gpio debugfs files
gpiolib: let gpio_chip reference its descriptors
gpiolib: use descriptors internally
gpiolib: use gpio_chips list in gpiochip_find_base
gpiolib: use gpio_chips list in sysfs ops
gpiolib: use gpio_chips list in gpiochip_find
gpiolib: use gpio_chips list in gpiolib_sysfs_init
gpiolib: link all gpio_chips using a list
gpio/langwell: cleanup driver
gpio/langwell: Add Cloverview ids to pci device table
gpio/lynxpoint: add chipset gpio driver.
gpiolib: add missing braces in gpio_direction_show
gpiolib-acpi: Fix error checks in interrupt requesting
gpio: mpc8xxx: don't set IRQ_TYPE_NONE when creating irq mapping
gpiolib: remove gpiochip_reserve()
arm: pxa: tosa: do not use gpiochip_reserve()
...
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An architecture should not unconditionally enable 'GENERIC_GPIO'
without providing an implementation. In case of arm64, selecting
ARCH_WANT_OPTIONAL_GPIOLIB is the right solution, because it
lets us enable GPIOLIB when configuring the kernel, and that
implicitly turns on GENERIC_GPIO.
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git into gpio/next
Device driver features, cleanups and bug fixes.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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GPIO address space reservation during early platform initialization is
not needed anymore for Tosa. Remove the calls to gpiochip_reserve()
which is due to be removed.
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC update from Chris Ball:
"MMC highlights for 3.9:
Core:
- Support for packed commands in eMMC 4.5. (This requires a host
capability to be turned on. It increases write throughput by 20%+,
but may also increase average write latency; more testing needed.)
- Add DT bindings for capability flags.
- Add mmc_of_parse() for shared DT parsing between drivers.
Drivers:
- android-goldfish: New MMC driver for the Android Goldfish emulator.
- mvsdio: Add DT bindings, pinctrl, use slot-gpio for card detection.
- omap_hsmmc: Fix boot hangs with RPMB partitions.
- sdhci-bcm2835: New driver for controller used by Raspberry Pi.
- sdhci-esdhc-imx: Add 8-bit data, auto CMD23 support, use slot-gpio.
- sh_mmcif: Add support for eMMC DDR, bundled MMCIF IRQs.
- tmio_mmc: Add DT bindings, support for vccq regulator"
* tag 'mmc-updates-for-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (92 commits)
mmc: tegra: assume CONFIG_OF, remove platform data
mmc: add DT bindings for more MMC capability flags
mmc: tmio: add support for the VccQ regulator
mmc: tmio: remove unused and deprecated symbols
mmc: sh_mobile_sdhi: use managed resource allocations
mmc: sh_mobile_sdhi: remove unused .pdata field
mmc: tmio-mmc: parse device-tree bindings
mmc: tmio-mmc: define device-tree bindings
mmc: sh_mmcif: use mmc_of_parse() to parse standard MMC DT bindings
mmc: (cosmetic) remove "extern" from function declarations
mmc: provide a standard MMC device-tree binding parser centrally
mmc: detailed definition of CD and WP MMC line polarities in DT
mmc: sdhi, tmio: only check flags in tmio-mmc driver proper
mmc: sdhci: Fix parameter of sdhci_do_start_signal_voltage_switch()
mmc: sdhci: check voltage range only on regulators aware of voltage value
mmc: bcm2835: set SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
mmc: support packed write command for eMMC4.5 devices
mmc: add packed command feature of eMMC4.5
mmc: rtsx: remove driving adjustment
mmc: use regulator_can_change_voltage() instead of regulator_count_voltages
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The next change will remove the code from the dw_mmc-exynos that added
the DW_MCI_QUIRK_NO_WRITE_PROTECT. Keep existing functionality of
having no write protect pin on smdk5250 by adding the disable-wp
property.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Chris Ball <cjb@laptop.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
Pull LED subsystem update from Bryan Wu.
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (61 commits)
leds: leds-sunfire: use dev_err()/pr_err() instead of printk()
leds: 88pm860x: Add missing of_node_put()
leds: tca6507: Use of_get_child_count()
leds: leds-pwm: make it depend on PWM and not HAVE_PWM
Documentation: leds: update LP55xx family devices
leds-lp55xx: fix problem on removing LED attributes
leds-lp5521/5523: add author and copyright description
leds-lp5521/5523: use new lp55xx common header
leds-lp55xx: clean up headers
leds-lp55xx: clean up definitions
leds-lp55xx: clean up unused data and functions
leds-lp55xx: clean up _remove()
leds-lp55xx: add new function for removing device attribtues
leds-lp55xx: code refactoring on selftest function
leds-lp55xx: use common device attribute driver function
leds-lp55xx: support device specific attributes
leds-lp5523: use generic firmware interface
leds-lp5521: use generic firmware interface
leds-lp55xx: support firmware interface
leds-lp55xx: add new lp55xx_register_sysfs() for the firmware interface
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The LP55xx common driver provides a new header, leds-lp55xx.h.
This driver enables removing duplicate code for both drivers and
making coherent driver structure.
LP5521 and LP5523/55231 platform data were merged into one common file.
Therefore, the LP5521/5523 platform code need to be fixed.
This patch has been already acked.
For ux500: https://lkml.org/lkml/2012/10/11/417
Acked-by: Linus Walleij <linus.walleij@linaro.org>
For omap: https://lkml.org/lkml/2012/10/11/334
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
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Pull slave-dmaengine updates from Vinod Koul:
"This is fairly big pull by my standards as I had missed last merge
window. So we have the support for device tree for slave-dmaengine,
large updates to dw_dmac driver from Andy for reusing on different
architectures. Along with this we have fixes on bunch of the drivers"
Fix up trivial conflicts, usually due to #include line movement next to
each other.
* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (111 commits)
Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT"
ARM: dts: pl330: Add #dma-cells for generic dma binding support
DMA: PL330: Register the DMA controller with the generic DMA helpers
DMA: PL330: Add xlate function
DMA: PL330: Add new pl330 filter for DT case.
dma: tegra20-apb-dma: remove unnecessary assignment
edma: do not waste memory for dma_mask
dma: coh901318: set residue only if dma is in progress
dma: coh901318: avoid unbalanced locking
dmaengine.h: remove redundant else keyword
dma: of-dma: protect list write operation by spin_lock
dmaengine: ste_dma40: do not remove descriptors for cyclic transfers
dma: of-dma.c: fix memory leakage
dw_dmac: apply default dma_mask if needed
dmaengine: ioat - fix spare sparse complain
dmaengine: move drivers/of/dma.c -> drivers/dma/of-dma.c
ioatdma: fix race between updating ioat->head and IOAT_COMPLETION_PENDING
dw_dmac: add support for Lynxpoint DMA controllers
dw_dmac: return proper residue value
dw_dmac: fill individual length of descriptor
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This reverts commit f9965aa20706860077cfa093d04a6351c0c1e940.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This patch adds #dma-cells property to PL330 DMA controller
nodes for supporting generic dma dt bindings on samsung
exynos5250 platform.
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The header is used by drivers/dma/amba-pl08x.c, which can be compiled
under x86, where PL080 exists under a PCI-to-AMBA bridge. This patche
moves it where it can be accessed by other architectures, and fixes
all users.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This patch adds dw_dmac's platform data to DT node. It also creates slave info
node for SPEAr13xx, for the devices which were using dw_dmac.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes from Rafael Wysocki:
- Fixes for blackfin and microblaze build problems introduced by the
removal of global pm_idle. From Lars-Peter Clausen.
- OPP core build fix from Shawn Guo.
- Error condition check fix for the new imx6q-cpufreq driver from Wei
Yongjun.
- Fix for an AER driver crash related to the lack of APEI
initialization for acpi=off. From Rafael J Wysocki.
- Fix for a USB breakage on Thinkpad T430 related to ACPI power
resources and PCI wakeup from Rafael J. Wysocki.
* tag 'pm+acpi-fixes-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / PM: Take unusual configurations of power resources into account
imx6q-cpufreq: fix return value check in imx6q_cpufreq_probe()
PM / OPP: fix condition for empty of_init_opp_table()
ACPI / APEI: Fix crash in apei_hest_parse() for acpi=off
microblaze idle: Fix compile error
blackfin idle: Fix compile error
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* pm-cpuidle:
microblaze idle: Fix compile error
blackfin idle: Fix compile error
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Commit def8203 ("microblaze idle: delete pm_idle") introduced the following
compile error:
arch/microblaze/kernel/process.c: In function 'cpu_idle':
arch/microblaze/kernel/process.c:100: error: 'idle' undeclared (first use in this function)
arch/microblaze/kernel/process.c:100: error: (Each undeclared identifier is reported only once
arch/microblaze/kernel/process.c:100: error: for each function it appears in.)
arch/microblaze/kernel/process.c:106: error: implicit declaration of function 'idle'
This patch fixes it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit 26bab0c ("blackfin idle: delete pm_idle") introduced the following
compile error:
arch/blackfin/kernel/process.c: In function ‘cpu_idle’:
arch/blackfin/kernel/process.c:83: error: ‘idle’ undeclared (first use in this function)
arch/blackfin/kernel/process.c:83: error: (Each undeclared identifier is reported only once
arch/blackfin/kernel/process.c:83: error: for each function it appears in.)
arch/blackfin/kernel/process.c:88: error: implicit declaration of function ‘idle’
This patch fixes it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Host bridge hotplug
- Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
- Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
- Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
- Stop caching _PRT and make independent of bus numbers (Yinghai Lu)
PCI device hotplug
- Clean up cpqphp dead code (Sasha Levin)
- Disable ARI unless device and upstream bridge support it (Yijing Wang)
- Initialize all hot-added devices (not functions 0-7) (Yijing Wang)
Power management
- Don't touch ASPM if disabled (Joe Lawrence)
- Fix ASPM link state management (Myron Stowe)
Miscellaneous
- Fix PCI_EXP_FLAGS accessor (Alex Williamson)
- Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
- Document hotplug resource and MPS parameters (Yijing Wang)
- Add accessor for PCIe capabilities (Myron Stowe)
- Drop pciehp suspend/resume messages (Paul Bolle)
- Make pci_slot built-in only (not a module) (Jiang Liu)
- Remove unused PCI/ACPI bind ops (Jiang Liu)
- Removed used pci_root_bus (Bjorn Helgaas)"
* tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits)
PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS
ACPI / PCI: Make pci_slot built-in only, not a module
PCI/PM: Clear state_saved during suspend
PCI: Use atomic_inc_return() rather than atomic_add_return()
PCI: Catch attempts to disable already-disabled devices
PCI: Disable Bus Master unconditionally in pci_device_shutdown()
PCI: acpiphp: Remove dead code for PCI host bridge hotplug
PCI: acpiphp: Create companion ACPI devices before creating PCI devices
PCI: Remove unused "rc" in virtfn_add_bus()
PCI: pciehp: Drop suspend/resume ENTRY messages
PCI/ASPM: Don't touch ASPM if forcibly disabled
PCI/ASPM: Deallocate upstream link state even if device is not PCIe
PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc
PCI: Document hpiosize= and hpmemsize= resource reservation parameters
PCI: Use PCI Express Capability accessor
PCI: Introduce accessor to retrieve PCIe Capabilities Register
PCI: Put pci_dev in device tree as early as possible
PCI: Skip attaching driver in device_add()
PCI: acpiphp: Keep driver loaded even if no slots found
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* pci/rafael-set-root-bridge-handle:
ACPI / PCI: Set root bridge ACPI handle in advance
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The ACPI handles of PCI root bridges need to be known to
acpi_bind_one(), so that it can create the appropriate
"firmware_node" and "physical_node" files for them, but currently
the way it gets to know those handles is not exactly straightforward
(to put it lightly).
This is how it works, roughly:
1. acpi_bus_scan() finds the handle of a PCI root bridge,
creates a struct acpi_device object for it and passes that
object to acpi_pci_root_add().
2. acpi_pci_root_add() creates a struct acpi_pci_root object,
populates its "device" field with its argument's address
(device->handle is the ACPI handle found in step 1).
3. The struct acpi_pci_root object created in step 2 is passed
to pci_acpi_scan_root() and used to get resources that are
passed to pci_create_root_bus().
4. pci_create_root_bus() creates a struct pci_host_bridge object
and passes its "dev" member to device_register().
5. platform_notify(), which for systems with ACPI is set to
acpi_platform_notify(), is called.
So far, so good. Now it starts to be "interesting".
6. acpi_find_bridge_device() is used to find the ACPI handle of
the given device (which is the PCI root bridge) and executes
acpi_pci_find_root_bridge(), among other things, for the
given device object.
7. acpi_pci_find_root_bridge() uses the name (sic!) of the given
device object to extract the segment and bus numbers of the PCI
root bridge and passes them to acpi_get_pci_rootbridge_handle().
8. acpi_get_pci_rootbridge_handle() browses the list of ACPI PCI
root bridges and finds the one that matches the given segment
and bus numbers. Its handle is then used to initialize the
ACPI handle of the PCI root bridge's device object by
acpi_bind_one(). However, this is *exactly* the ACPI handle we
started with in step 1.
Needless to say, this is quite embarassing, but it may be avoided
thanks to commit f3fd0c8 (ACPI: Allow ACPI handles of devices to be
initialized in advance), which makes it possible to initialize the
ACPI handle of a device before passing it to device_register().
Accordingly, add a new __weak routine, pcibios_root_bridge_prepare(),
defaulting to an empty implementation that can be replaced by the
interested architecutres (x86 and ia64 at the moment) with functions
that will set the root bridge's ACPI handle before its dev member is
passed to device_register(). Make both x86 and ia64 provide such
implementations of pcibios_root_bridge_prepare() and remove
acpi_pci_find_root_bridge() and acpi_get_pci_rootbridge_handle() that
aren't necessary any more.
Included is a fix for breakage on systems with non-ACPI PCI host
bridges from Bjorn Helgaas.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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* pci/yinghai-survey-resources:
x86/PCI: Implement pcibios_resource_survey_bus()
PCI/ACPI: Reserve firmware-allocated resources for hot-added root buses
x86/PCI: Keep resource allocation functions after boot
x86/PCI: Don't track firmware-assigned BAR values for hot-added devices
x86/PCI: Factor out pcibios_allocate_dev_rom_resource()
x86/PCI: Allocate resources on a per-bus basis for hot-adding root buses
x86/PCI: Factor out pcibios_allocate_dev_resources()
x86/PCI: Factor out pcibios_allocate_bridge_resources()
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During testing remove/rescan root bus 00, found
[ 338.142574] bus: 'pci': really_probe: probing driver ata_piix with device 0000:00:01.1
[ 338.146788] ata_piix 0000:00:01.1: device not available (can't reserve [io 0x01f0-0x01f7])
[ 338.150565] ata_piix: probe of 0000:00:01.1 failed with error -22
because that fixed resource is not claimed.
For bootint path it is claimed in from
arch/x86/pci/i386.c::pcibios_allocate_resources()
Claim those resources, so on the remove/rescan will still use old
resources.
It is some kind honoring FW setting in the registers during hot add.
esp root-bus hot add is through acpi, BIOS has chance to set some registers
before handing over.
[bhelgaas: move weak definition to patch that uses it]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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The PCI resource allocation functions will be used for hot-added
devices, so keep them around.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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The BIOS doesn't assign BAR values for hot-added devices, so don't
bother saving the original values when we enumerate these devices.
[bhelgaas: changelog, return constant 0 in pcibios_retrieve_fw_addr]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Factor pcibios_allocate_rom_resources() and
pcibios_allocate_dev_rom_resource() out of pcibios_assign_resources().
This will allow us to allocate ROM resources for hot-added root buses.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Previously pcibios_allocate_resources() allocated resources at boot-time
for all PCI devices using for_each_pci_dev(). This patch changes
pcibios_allocate_resources() so we can specify a bus, so we can do
similar allocation when hot-adding a root bus.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Factor pcibios_allocate_dev_resources() out of
pcibios_allocate_resources(). Currently we only allocate these
resources at boot-time with a for_each_pci_dev() loop. Eventually
we'll use pcibios_allocate_dev_resources() for hot-added devices, too.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Thus pcibios_allocate_bus_resources() could more simple and clean.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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pci_root_bus is unused, so remove all references to it.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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pci_root_bus is unused, so remove all references to it.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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pci_root_bus is unused, so remove all references to it.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Pull KVM ARM compile fixes from Gleb Natapov:
"Fix ARM KVM compilation breakage due to changes from kvm.git"
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
ARM: KVM: fix compilation after removal of user_alloc from struct kvm_memory_slot
ARM: KVM: Rename KVM_MEMORY_SLOTS -> KVM_USER_MEM_SLOTS
ARM: KVM: fix kvm_arch_{prepare,commit}_memory_region
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kvm_memory_slot
Commit 7a905b1 (KVM: Remove user_alloc from struct kvm_memory_slot)
broke KVM/ARM by removing the user_alloc field from a public structure.
As we only used this field to alert the user that we didn't support
this operation mode, there is no harm in discarding this bit of code
without any remorse.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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Commit bbacc0c (KVM: Rename KVM_MEMORY_SLOTS -> KVM_USER_MEM_SLOTS)
broke KVM/ARM by changing a global #define.
Apply the same change to fix the compilation breakage.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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