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* Fix a few incorrectly checked [io_]remap_pfn_range() callsLinus Torvalds2013-10-291-2/+15
| | | | | | | | | | | | Nico Golde reports a few straggling uses of [io_]remap_pfn_range() that really should use the vm_iomap_memory() helper. This trivially converts two of them to the helper, and comments about why the third one really needs to continue to use remap_pfn_range(), and adds the missing size check. Reported-by: Nico Golde <nico@ngolde.de> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org.
* Merge tag 'driver-core-3.12-rc1' of ↵Linus Torvalds2013-09-031-9/+13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core patches from Greg KH: "Here's the big driver core pull request for 3.12-rc1. Lots of tiny changes here fixing up the way sysfs attributes are created, to try to make drivers simpler, and fix a whole class race conditions with creations of device attributes after the device was announced to userspace. All the various pieces are acked by the different subsystem maintainers" * tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (119 commits) firmware loader: fix pending_fw_head list corruption drivers/base/memory.c: introduce help macro to_memory_block dynamic debug: line queries failing due to uninitialized local variable sysfs: sysfs_create_groups returns a value. debugfs: provide debugfs_create_x64() when disabled rbd: convert bus code to use bus_groups firmware: dcdbas: use binary attribute groups sysfs: add sysfs_create/remove_groups for when SYSFS is not enabled driver core: add #include <linux/sysfs.h> to core files. HID: convert bus code to use dev_groups Input: serio: convert bus code to use drv_groups Input: gameport: convert bus code to use drv_groups driver core: firmware: use __ATTR_RW() driver core: core: use DEVICE_ATTR_RO driver core: bus: use DRIVER_ATTR_WO() driver core: create write-only attribute macros for devices and drivers sysfs: create __ATTR_WO() driver-core: platform: convert bus code to use dev_groups workqueue: convert bus code to use dev_groups MEI: convert bus code to use dev_groups ...
| * UIO: convert class code to use dev_groupsGreg Kroah-Hartman2013-07-241-9/+13
| | | | | | | | | | | | | | | | | | The dev_attrs field of struct class is going away soon, dev_groups should be used instead. This converts the uio class code to use the correct field. Cc: Hans J. Koch <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio: Kconfig: add MMU dependancy for UIOChen Gang2013-08-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The User space I/O drivers are useful, only when user space meaningful (MMU must be enabled). So need let it depend on MMU, or can not pass compiling, the related error (allmodconfig for H8300): CC [M] drivers/uio/uio.o drivers/uio/uio.c: In function 'uio_mmap_physical': drivers/uio/uio.c:650:2: error: implicit declaration of function 'pgprot_noncached' [-Werror=implicit-function-declaration] drivers/uio/uio.c:650:20: error: incompatible types when assigning to type 'pgprot_t' from type 'int' Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio: Add driver for Humusoft MF624 DAQ PCI cardRostislav Lisovy2013-08-303-0/+261
| | | | | | | | | | Signed-off-by: Rostislav Lisovy <lisovy@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_pdrv_genirq: use dev_get_platdata()Jingoo Han2013-08-301-1/+1
| | | | | | | | | | | | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_pruss: use dev_get_platdata()Jingoo Han2013-08-301-1/+1
| | | | | | | | | | | | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_dmem_genirq: use dev_get_platdata()Jingoo Han2013-08-301-1/+1
| | | | | | | | | | | | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: uio_pruss: remove unnecessary platform_set_drvdata()Jingoo Han2013-08-271-1/+0
| | | | | | | | | | | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: drop unused vma_count member in uio_device structUwe Kleine-König2013-08-121-16/+0
| | | | | | | | | | | | | | vma_count is used write-only and so fails to be useful. So remove it. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: provide vm access to UIO_MEM_PHYS mapsUwe Kleine-König2013-08-121-9/+17
| | | | | | | | | | | | | | | | | | | | | | This makes it possible to let gdb access mappings of the process that is being debugged. uio_mmap_logical was moved and uio_vm_ops renamed to group related code and differentiate to new stuff. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: Remove uio_pdrv and use uio_pdrv_genirq insteadMichal Simek2013-07-263-121/+0
|/ | | | | | | | | | | | | | | The patch "UIO: fix uio_pdrv_genirq with device tree but no interrupt" (sha1: e3a3c3a205554e564751cd9c0276b2af813d7a92) add support to use this driver with no interrupts. uio_pdrv_genirq also supports device-tree binding which is not available in uio_pdrv. That's why this uio_pdrv driver can be just removed. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Vitalii Demianets <vitas@nppfactor.kiev.ua> Reviewed-by: Pavel Machek <pavel@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* uio: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFTLibin2013-07-031-1/+1
| | | | | | | | | (*->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 <huawei.libin@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers: uio_pdrv_genirq: Use of_match_ptr() macroSachin Kamat2013-06-251-4/+1
| | | | | | | | This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* UIO: Fix concurrency issueVitalii Demianets2013-06-241-5/+13
| | | | | | | | | | | | | | | 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 <vitas@nppfactor.kiev.ua> Reviewed-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers: uio_dmem_genirq: Use of_match_ptr() macroSachin Kamat2013-06-241-3/+1
| | | | | | | | | This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* UIO: fix uio_pdrv_genirq with device tree but no interruptPavel Machek2013-06-181-15/+10
| | | | | | | | | | | | | | | | | 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 <pavel@denx.de> Reported-by: Detlev Zundel <dzu@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* UIO: allow binding uio_pdrv_genirq.c to devices using command line optionPavel Machek2013-06-181-2/+6
| | | | | | | | | | 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 <pavel@denx.de> Tested-by: Detlev Zundel <dzu@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* uio: uio_pruss: Fix potential NULL pointer dereferenceEmil Goode2013-06-061-1/+1
| | | | | | | | | 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 <emilgoode@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge 3.10-rc3 into char-misc-nextGreg Kroah-Hartman2013-05-271-0/+1
|\ | | | | | | | | | | We want the changes in here. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * uio: UIO_DMEM_GENIRQ should depend on HAS_DMAGeert Uytterhoeven2013-05-211-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <geert@linux-m68k.org> Cc: Hans J. Koch <hjk@hansjkoch.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio/uio_pci_generic: Use module_pci_driver to register driverPeter Huewe2013-05-211-15/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio/uio_cif: Use module_pci_driver to register driverPeter Huewe2013-05-211-13/+1
| | | | | | | | | | | | | | | | 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 <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio/uio_netx: Use module_pci_driver to register driverPeter Huewe2013-05-211-13/+1
| | | | | | | | | | | | | | | | 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 <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio/uio_sercos3: Use module_pci_driver to register driverPeter Huewe2013-05-211-13/+1
| | | | | | | | | | | | | | | | 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 <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio/uio_aec: Use module_pci_driver to register driverPeter Huewe2013-05-211-13/+1
|/ | | | | | | | 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 <peterhuewe@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers: uio: Fix UIO device registration failureDamian Hobson-Garcia2013-03-291-0/+1
| | | | | | | | | | | | 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" <hjk@hansjkoch.de> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* uio: convert to idr_alloc()Tejun Heo2013-02-271-15/+4
| | | | | | | | | | Convert to the much saner new idr interface. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uio: remove !S390 dependency from KconfigHeiko Carstens2013-02-141-1/+0
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds2012-12-122-7/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * uio: uio_pruss: replace private SRAM API with genallocMatt Porter2012-10-272-7/+18
| | | | | | | | | | | | | | | | | | | | 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 <mporter@ti.com> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
* | drivers: uio: Only allocate new private data when probing device tree nodeDamian Hobson-Garcia2012-11-212-2/+2
| | | | | | | | | | | | | | | | | | | | | | 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 <fengguang.wu@intel.com> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_dmem_genirq: Allow partial success when opening deviceDamian Hobson-Garcia2012-11-211-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_dmem_genirq: Don't use DMA_ERROR_CODE to indicate unmapped regionsDamian Hobson-Garcia2012-11-211-2/+4
| | | | | | | | | | | | | | | | | | | | | | 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 <fengguang.wu@intel.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | drivers: uio_dmem_genirq: Don't mix address spaces for dynamic region vaddrDamian Hobson-Garcia2012-11-211-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] <asn:2>*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] <asn:2>*internal_addr Store the void * in the driver's private data instead. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: remove use of __devexitBill Pemberton2012-11-211-1/+1
| | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: remove use of __devinitdataBill Pemberton2012-11-212-2/+2
| | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devinitdata is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: remove use of __devinitBill Pemberton2012-11-216-6/+6
| | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio: remove use of __devexit_pBill Pemberton2012-11-211-1/+1
| | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | uio_pdrv: set memory mapping nameManuel Traut2012-11-152-0/+2
| | | | | | | | | | | | | | | | | | | | | | 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 <manut@linutronix.de> Reported-by: Stefan Staedtler <stefan.staedtler@siemens.com> Tested-by: Stefan Staedtler <stefan.staedtler@siemens.com> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Add new uio device for dynamic memory allocationDamian Hobson-Garcia2012-10-243-0/+371
|/ | | | | | | | | | | | | | | | | | | | | | 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 <dhobsong@igel.co.jp> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mm: kill vma flag VM_RESERVED and mm->reserved_vm counterKonstantin Khlebnikov2012-10-091-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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_PFNMAP This 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 <khlebnikov@openvz.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Eric Paris <eparis@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Morris <james.l.morris@oracle.com> Cc: Jason Baron <jbaron@redhat.com> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Venkatesh Pallipadi <venki@google.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uio_pdrv_genirq: get irq through platform resource if not set otherwiseBenedikt Spranger2012-05-151-0/+8
| | | | | | | | | | | | 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 <b.spranger@linutronix.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge branch 'linux-next' of ↵Linus Torvalds2012-01-111-71/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci * '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.
| * uio: Convert uio_generic_pci to new intx masking APIJan Kiszka2012-01-061-72/+7
| | | | | | | | | | | | | | | | | | 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 <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Rework config space blocking servicesJan Kiszka2012-01-061-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <brking@linux.vnet.ibm.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | uio: convert drivers/uio/* to use module_platform_driver()Axel Lin2011-11-263-36/+3
|/ | | | | | | | | | | | | 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 <Uwe.Kleine-Koenig@digi.com> Cc: Magnus Damm <damm@igel.co.jp> Cc: Amit Chatterjee <amit.chatterjee@ti.com> Cc: Pratheesh Gangadhar <pratheesh@ti.com> Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* uio: Add module.h to implicit drivers/uio usersPaul Gortmaker2011-10-312-0/+2
| | | | | | | 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 <paul.gortmaker@windriver.com>
* uio: Support physical addresses >32 bits on 32-bit systemsKai Jiang2011-10-181-4/+3
| | | | | | | | | | | | | | | | | | | | | | | 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 <Kai.Jiang@freescale.com> Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Hans J. Koch <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* drivers:uio:fix section mismatch in uio_pdrv_genirq.cWanlong Gao2011-08-221-1/+1
| | | | | | | | | | | | | | | | | | 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, *_console Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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