04 Jul, 2013
1 commit
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(*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
as a inline funcion vma_pages() in linux/mm.h, so using it.Signed-off-by: Libin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jun, 2013
1 commit
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This eliminates having an #ifdef returning NULL for the case
when OF is disabled.Signed-off-by: Sachin Kamat
Signed-off-by: Greg Kroah-Hartman
25 Jun, 2013
2 commits
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In a SMP case there was a race condition issue between
uio_pdrv_genirq_irqcontrol() running on one CPU and irq handler on
another CPU. Fix it by spin_locking shared resources access inside irq
handler. Also:
- Change disable_irq to disable_irq_nosync to avoid deadlock, because
disable_irq waits for the completion of the irq handler;
- Change atomic bit-manipulation routines to their non-atomic
counterparts as we already are guarding the code by spinlock.Signed-off-by: Vitalii Demianets
Reviewed-by: Pavel Machek
Signed-off-by: Greg Kroah-Hartman -
This eliminates having an #ifdef returning NULL for the case
when OF is disabled.Signed-off-by: Sachin Kamat
Acked-by: Damian Hobson-Garcia
Signed-off-by: Greg Kroah-Hartman
19 Jun, 2013
2 commits
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If device is initialized from device tree, but has no interrupt
assigned, uio will still try to request and interrupt old way,
fails, and fails registration.This is wrong; don't try initializing irq using platform data if
device tree is available.Simplified code based on suggestion by Grant Likely.
Fixed memory leak in "irq can not be registered" error path.
Signed-off-by: Pavel Machek
Reported-by: Detlev Zundel
Signed-off-by: Greg Kroah-Hartman -
This adds ability to bind uio driver to given open firmware device
using command line option. Thus, userspace driver can be developed and
used without modifying the kernel.Signed-off-by: Pavel Machek
Tested-by: Detlev Zundel
Signed-off-by: Greg Kroah-Hartman
07 Jun, 2013
1 commit
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In function pruss_probe we free gdev and try to use
it on the next line. I have moved the dereference to
above the kfree of gdev.Signed-off-by: Emil Goode
Signed-off-by: Greg Kroah-Hartman
27 May, 2013
1 commit
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We want the changes in here.
Signed-off-by: Greg Kroah-Hartman
22 May, 2013
6 commits
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Removing some boilerplate by using module_pci_driver instead of calling
register and unregister in the otherwise empty init/exit functions.It removes a pr_info showing some details about the driver, but
these infos can also be retrieved by using modinfo.The name of the pci_driver struct had to be changed in order to prevent a
build failure.Signed-off-by: Peter Huewe
Signed-off-by: Greg Kroah-Hartman -
If NO_DMA=y:
drivers/built-in.o: In function `uio_dmem_genirq_release':
drivers/uio/uio_dmem_genirq.c:95: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `uio_dmem_genirq_open':
drivers/uio/uio_dmem_genirq.c:61: undefined reference to `dma_alloc_coherent'Signed-off-by: Geert Uytterhoeven
Cc: Hans J. Koch
Cc: Greg Kroah-Hartman
Signed-off-by: Greg Kroah-Hartman -
Removing some boilerplate by using module_pci_driver instead of calling
register and unregister in the otherwise empty init/exit functions.Signed-off-by: Peter Huewe
Signed-off-by: Greg Kroah-Hartman -
Removing some boilerplate by using module_pci_driver instead of calling
register and unregister in the otherwise empty init/exit functions.Signed-off-by: Peter Huewe
Signed-off-by: Greg Kroah-Hartman -
Removing some boilerplate by using module_pci_driver instead of calling
register and unregister in the otherwise empty init/exit functions.Signed-off-by: Peter Huewe
Signed-off-by: Greg Kroah-Hartman -
Removing some boilerplate by using module_pci_driver instead of calling
register and unregister in the otherwise empty init/exit functions.Signed-off-by: Peter Huewe
Signed-off-by: Greg Kroah-Hartman
30 Mar, 2013
1 commit
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Until recently uio_get_minor() returned 0 for success and
a negative value on failure. This became non-negative for suceess and
negative for failure. Restore the original return value spec so that we can
successfully initialize UIO devices with a non-zero minor device
number.Cc: "Hans J. Koch"
Signed-off-by: Damian Hobson-Garcia
Signed-off-by: Greg Kroah-Hartman
28 Feb, 2013
1 commit
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Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo
Acked-by: Greg Kroah-Hartman
Cc: "Hans J. Koch"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Feb, 2013
1 commit
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Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
13 Dec, 2012
1 commit
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Pull ARM SoC updates from Olof Johansson:
"This contains the bulk of new SoC development for this merge window.Two new platforms have been added, the sunxi platforms (Allwinner A1x
SoCs) by Maxime Ripard, and a generic Broadcom platform for a new
series of ARMv7 platforms from them, where the hope is that we can
keep the platform code generic enough to have them all share one mach
directory. The new Broadcom platform is contributed by Christian
Daudt.Highbank has grown support for Calxeda's next generation of hardware,
ECX-2000.clps711x has seen a lot of cleanup from Alexander Shiyan, and he's
also taken on maintainership of the platform.Beyond this there has been a bunch of work from a number of people on
converting more platforms to IRQ domains, pinctrl conversion, cleanup
and general feature enablement across most of the active platforms."Fix up trivial conflicts as per Olof.
* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (174 commits)
mfd: vexpress-sysreg: Remove LEDs code
irqchip: irq-sunxi: Add terminating entry for sunxi_irq_dt_ids
clocksource: sunxi_timer: Add terminating entry for sunxi_timer_dt_ids
irq: versatile: delete dangling variable
ARM: sunxi: add missing include for mdelay()
ARM: EXYNOS: Avoid early use of of_machine_is_compatible()
ARM: dts: add node for PL330 MDMA1 controller for exynos4
ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
ARM: EXYNOS: add UART3 to DEBUG_LL ports
ARM: S3C24XX: Add clkdev entry for camif-upll clock
ARM: SAMSUNG: Add s3c24xx/s3c64xx CAMIF GPIO setup helpers
ARM: sunxi: Add missing sun4i.dtsi file
pinctrl: samsung: Do not initialise statics to 0
ARM i.MX6: remove gate_mask from pllv3
ARM i.MX6: Fix ethernet PLL clocks
ARM i.MX6: rename PLLs according to datasheet
ARM i.MX6: Add pwm support
ARM i.MX51: Add pwm support
ARM i.MX53: Add pwm support
ARM: mx5: Replace clk_register_clkdev with clock DT lookup
...
22 Nov, 2012
8 commits
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The same condition should be used both when allocating and freeing the
driver private data. When dev.of_node is non NULL, allocate a new
private data structure, otherwise use the values from the platform data.Reported-by: Fengguang Wu
Signed-off-by: Damian Hobson-Garcia
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
The uio device should not fail on open just because one memory allocation
fails. The device might export several regions, the failure of some of
which may or may not be a problem for the user space driver. Failing
regions will remain unmapped, and successful regions will be mapped and
exported to user space. Also deals with the case where failing to map
a region after successfully allocating others would not unmap the
successfully allocated regions before dying.Signed-off-by: Damian Hobson-Garcia
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
DMA_ERROR_CODE is not defined on all architectures and is architecture
specific. Instead, use the constant, ~0 to indicate unmapped regions.Reported-by: Fengguang Wu
Reported-by: Geert Uytterhoeven
Signed-off-by: Damian Hobson-Garcia
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
Assigning the virtual address returned from dma_alloc_coherent to the the
internal_addr element of uioinfo produces the following sparse errors since
internal_addr is a void __iomem * and dma_alloc_coherent returns void *.+ drivers/uio/uio_dmem_genirq.c:65:39: sparse: incorrect type in assignment (different address spaces)
drivers/uio/uio_dmem_genirq.c:65:39: expected void [noderef] *internal_addr
drivers/uio/uio_dmem_genirq.c:65:39: got void *[assigned] addr
+ drivers/uio/uio_dmem_genirq.c:93:17: sparse: incorrect type in argument 3 (different address spaces)
drivers/uio/uio_dmem_genirq.c:93:17: expected void *vaddr
drivers/uio/uio_dmem_genirq.c:93:17: got void [noderef] *internal_addrStore the void * in the driver's private data instead.
Reported-by: Fengguang Wu
Signed-off-by: Damian Hobson-Garcia
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.Signed-off-by: Bill Pemberton
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
CONFIG_HOTPLUG is going away as an option so __devinitdata is no
longer needed.Signed-off-by: Bill Pemberton
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.Signed-off-by: Bill Pemberton
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.Signed-off-by: Bill Pemberton
Cc: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman
16 Nov, 2012
1 commit
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If uio_pdrv[_genirq] is used, the uio maps have currently no name set.
This patch sets the uio_mem name to the name of the memory resource.Signed-off-by: Manuel Traut
Reported-by: Stefan Staedtler
Tested-by: Stefan Staedtler
Signed-off-by: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman
27 Oct, 2012
1 commit
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Remove the use of the private DaVinci SRAM API in favor
of genalloc. The pool to be used is provided by platform
data.Signed-off-by: Matt Porter
Signed-off-by: "Hans J. Koch"
Signed-off-by: Sekhar Nori
25 Oct, 2012
1 commit
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This device extends the uio_pdrv_genirq driver to provide limited
dynamic memory allocation for UIO devices. This allows UIO devices
to use CMA and IOMMU allocated memory regions. This driver is based
on the uio_pdrv_genirq driver and provides the same generic interrupt
handling capabilities. Like uio_prdv_genirq,
a fixed number of memory regions, defined in the platform device's
.resources field are exported to userpace. This driver adds the ability
to export additional regions whose number and size are known at boot time,
but whose memory is not allocated until the uio device file is opened for
the first time. When the device file is closed, the allocated memory block
is freed. Physical (DMA) addresses for the dynamic regions are provided to
the userspace via /sys/class/uio/uioX/maps/mapY/addr in the same way as
static addresses are when the uio device file is open, when no processes
are holding the device file open, the address returned to userspace is
DMA_ERROR_CODE.Signed-off-by: Damian Hobson-Garcia
Signed-off-by: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman
09 Oct, 2012
1 commit
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A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA,
currently it lost original meaning but still has some effects:| effect | alternative flags
-+------------------------+---------------------------------------------
1| account as reserved_vm | VM_IO
2| skip in core dump | VM_IO, VM_DONTDUMP
3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
4| do not mlock | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAPThis patch removes reserved_vm counter from mm_struct. Seems like nobody
cares about it, it does not exported into userspace directly, it only
reduces total_vm showed in proc.Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP.
remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP.
remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP.[akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup]
Signed-off-by: Konstantin Khlebnikov
Cc: Alexander Viro
Cc: Carsten Otte
Cc: Chris Metcalf
Cc: Cyrill Gorcunov
Cc: Eric Paris
Cc: H. Peter Anvin
Cc: Hugh Dickins
Cc: Ingo Molnar
Cc: James Morris
Cc: Jason Baron
Cc: Kentaro Takeda
Cc: Matt Helsley
Cc: Nick Piggin
Cc: Oleg Nesterov
Cc: Peter Zijlstra
Cc: Robert Richter
Cc: Suresh Siddha
Cc: Tetsuo Handa
Cc: Venkatesh Pallipadi
Acked-by: Linus Torvalds
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 May, 2012
1 commit
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Platform devices are configured through platform resources. The interrupt
in the driver uio_pdrv_genirq is instead configured through a side channel
i.e. the platform data structure. Make it possible to use the generic
configuration scheme via platform resource.Signed-off-by: Benedikt Spranger
Acked-by: Magnus Damm
Signed-off-by: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman
12 Jan, 2012
1 commit
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* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (80 commits)
x86/PCI: Expand the x86_msi_ops to have a restore MSIs.
PCI: Increase resource array mask bit size in pcim_iomap_regions()
PCI: DEVICE_COUNT_RESOURCE should be equal to PCI_NUM_RESOURCES
PCI: pci_ids: add device ids for STA2X11 device (aka ConneXT)
PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB
x86/PCI: amd: factor out MMCONFIG discovery
PCI: Enable ATS at the device state restore
PCI: msi: fix imbalanced refcount of msi irq sysfs objects
PCI: kconfig: English typo in pci/pcie/Kconfig
PCI/PM/Runtime: make PCI traces quieter
PCI: remove pci_create_bus()
xtensa/PCI: convert to pci_scan_root_bus() for correct root bus resources
x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus()
x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented()
x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan
sparc32, leon/PCI: convert to pci_scan_root_bus() for correct root bus resources
sparc/PCI: convert to pci_create_root_bus()
sh/PCI: convert to pci_scan_root_bus() for correct root bus resources
powerpc/PCI: convert to pci_create_root_bus()
powerpc/PCI: split PHB part out of pcibios_map_io_space()
...Fix up conflicts in drivers/pci/msi.c and include/linux/pci_regs.h due
to the same patches being applied in other branches.
07 Jan, 2012
2 commits
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The new PCI API provides both generic probing for 2.3 masking support
and check&mask in the interrupt handler.Acked-by: Michael S. Tsirkin
Signed-off-by: Jan Kiszka
Signed-off-by: Jesse Barnes -
pci_block_user_cfg_access was designed for the use case that a single
context, the IPR driver, temporarily delays user space accesses to the
config space via sysfs. This assumption became invalid by the time
pci_dev_reset was added as locking instance. Today, if you run two loops
in parallel that reset the same device via sysfs, you end up with a
kernel BUG as pci_block_user_cfg_access detect the broken assumption.This reworks the pci_block_user_cfg_access to a sleeping service
pci_cfg_access_lock and an atomic-compatible variant called
pci_cfg_access_trylock. The former not only blocks user space access as
before but also waits if access was already locked. The latter service
just returns false in this case, allowing the caller to resolve the
conflict instead of raising a BUG.Adaptions of the ipr driver were originally written by Brian King.
Acked-by: Brian King
Acked-by: Michael S. Tsirkin
Signed-off-by: Jan Kiszka
Signed-off-by: Jesse Barnes
27 Nov, 2011
1 commit
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This patch converts the drivers in drivers/uio/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.Cc: Uwe Kleine-König
Cc: Magnus Damm
Cc: Amit Chatterjee
Cc: Pratheesh Gangadhar
Signed-off-by: Axel Lin
Signed-off-by: Greg Kroah-Hartman
01 Nov, 2011
1 commit
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We are cleaning up the omnipresent module.h stuff, so people
who really use it need to call it out explicitly.Signed-off-by: Paul Gortmaker
19 Oct, 2011
1 commit
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To support >32-bit physical addresses for UIO_MEM_PHYS type we need to
extend the width of 'addr' in struct uio_mem. Numerous platforms like
embedded PPC, ARM, and X86 have support for systems with larger physical
address than logical.Since 'addr' may contain a physical, logical, or virtual address the
easiest solution is to just change the type to 'phys_addr_t' which
should always be greater than or equal to the sizeof(void *) such that
it can properly hold any of the address types.For physical address we can support up to a 44-bit physical address on a
typical 32-bit system as we utilize remap_pfn_range() for the mapping of
the memory region and pfn's are represnted by shifting the address by
the page size (typically 4k).Signed-off-by: Kai Jiang
Signed-off-by: Minghuan Lian
Signed-off-by: Kumar Gala
Signed-off-by: Hans J. Koch
Signed-off-by: Greg Kroah-Hartman
23 Aug, 2011
3 commits
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Remove the __devinitconst to fix the section mismatch.
WARNING: drivers/uio/built-in.o(.data+0x2e8): Section mismatch in
reference from the variable uio_pdrv_genirq to the variable
.devinit.rodata:uio_of_genirq_match
The variable uio_pdrv_genirq references
the variable __devinitconst uio_of_genirq_match
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the
variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one,
*_consoleSigned-off-by: Wanlong Gao
Signed-off-by: Greg Kroah-Hartman -
Remove one *goto* label in uio.c.
Signed-off-by: Wanlong Gao
Signed-off-by: "Hans J. Koch"
Signed-off-by: Greg Kroah-Hartman -
The spin_lock in uio_pci_generic.c is only used in the interrupt
handler, which cannot be executed twice at the same time.
That makes the lock rather pointless. This patch removes it.Cc: "Michael S. Tsirkin"
Cc: Chris Wright
Cc: Jesse Barnes
Cc: Sebastian Andrzej Siewior
Cc: Anthony Foiani
Reported-by: Anthony Foiani
Reported-by: Sebastian Andrzej Siewior
Signed-off-by: Hans J. Koch
Acked-by: Michael S. Tsirkin
Signed-off-by: Greg Kroah-Hartman
