user/sven/linux.git/include/linux/genalloc.h, branch v4.4.12

genalloc: add support of multiple gen_pools per device

2015-09-04T23:54:41Z

This change fills devm_gen_pool_create()/gen_pool_get() "name" argument stub with contents and extends of_gen_pool_get() functionality on this basis. If there is no associated platform device with a device node passed to of_gen_pool_get(), the function attempts to get a label property or device node name (= repeats MTD OF partition standard) and seeks for a named gen_pool registered by device of the parent device node. The main idea of the change is to allow registration of independent gen_pools under the same umbrella device, say "partitions" on "storage device", the original functionality of one "partition" per "storage device" is untouched. [akpm@linux-foundation.org: fix constness in devres_find()] [dan.carpenter@oracle.com: freeing const data pointers] Signed-off-by: Vladimir Zapolskiy Cc: Philipp Zabel Cc: Greg Kroah-Hartman Cc: Russell King Cc: Nicolas Ferre Cc: Alexandre Belloni Cc: Jean-Christophe Plagniol-Villard Cc: Shawn Guo Cc: Sascha Hauer Cc: Mauro Carvalho Chehab Cc: Arnd Bergmann Signed-off-by: Dan Carpenter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: add name arg to gen_pool_get() and devm_gen_pool_create()

2015-09-04T23:54:41Z

This change modifies gen_pool_get() and devm_gen_pool_create() client interfaces adding one more argument "name" of a gen_pool object. Due to implementation gen_pool_get() is capable to retrieve only one gen_pool associated with a device even if multiple gen_pools are created, fortunately right at the moment it is sufficient for the clients, hence provide NULL as a valid argument on both producer devm_gen_pool_create() and consumer gen_pool_get() sides. Because only one created gen_pool per device is addressable, explicitly add a restriction to devm_gen_pool_create() to create only one gen_pool per device, this implies two possible error codes returned by the function, account it on client side (only misc/sram). This completes client side changes related to genalloc updates. [akpm@linux-foundation.org: gen_pool_get() cleanup] Signed-off-by: Vladimir Zapolskiy Cc: Philipp Zabel Cc: Greg Kroah-Hartman Cc: Russell King Cc: Nicolas Ferre Cc: Alexandre Belloni Cc: Jean-Christophe Plagniol-Villard Cc: Shawn Guo Cc: Sascha Hauer Cc: Mauro Carvalho Chehab Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: rename of_get_named_gen_pool() to of_gen_pool_get()

2015-07-01T02:45:01Z

To be consistent with other kernel interface namings, rename of_get_named_gen_pool() to of_gen_pool_get(). In the original function name "_named" suffix references to a device tree property, which contains a phandle to a device and the corresponding device driver is assumed to register a gen_pool object. Due to a weak relation and to avoid any confusion (e.g. in future possible scenario if gen_pool objects are named) the suffix is removed. [sfr@canb.auug.org.au: crypto/marvell/cesa - fix up for of_get_named_gen_pool() rename] Signed-off-by: Vladimir Zapolskiy Cc: Nicolas Ferre Cc: Philipp Zabel Cc: Shawn Guo Cc: Sascha Hauer Cc: Alexandre Belloni Cc: Russell King Cc: Mauro Carvalho Chehab Cc: Vinod Koul Cc: Takashi Iwai Cc: Jaroslav Kysela Signed-off-by: Stephen Rothwell Cc: Herbert Xu Cc: Boris BREZILLON Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: rename dev_get_gen_pool() to gen_pool_get()

2015-07-01T02:45:01Z

To be consistent with other genalloc interface namings, rename dev_get_gen_pool() to gen_pool_get(). The original omitted "dev_" prefix is removed, since it points to argument type of the function, and so it does not bring any useful information. [akpm@linux-foundation.org: update arch/arm/mach-socfpga/pm.c] Signed-off-by: Vladimir Zapolskiy Acked-by: Nicolas Ferre Cc: Philipp Zabel Cc: Shawn Guo Cc: Sascha Hauer Cc: Alexandre Belloni Cc: Russell King Cc: Mauro Carvalho Chehab Cc: Vinod Koul Cc: Takashi Iwai Cc: Jaroslav Kysela Cc: Mark Brown Cc: Nicolas Ferre Cc: Alan Tull Cc: Dinh Nguyen Cc: Kevin Hilman Cc: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: add genpool range check function

2014-10-10T02:25:52Z

After allocating an address from a particular genpool, there is no good way to verify if that address actually belongs to a genpool. Introduce addr_in_gen_pool which will return if an address plus size falls completely within the genpool range. Signed-off-by: Laura Abbott Acked-by: Will Deacon Reviewed-by: Olof Johansson Reviewed-by: Catalin Marinas Cc: Arnd Bergmann Cc: David Riley Cc: Ritesh Harjain Cc: Russell King Cc: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: add power aligned algorithm

2014-10-10T02:25:52Z

One of the more common algorithms used for allocation is to align the start address of the allocation to the order of size requested. Add this as an algorithm option for genalloc. Signed-off-by: Laura Abbott Acked-by: Will Deacon Acked-by: Olof Johansson Reviewed-by: Catalin Marinas Cc: Arnd Bergmann Cc: David Riley Cc: Ritesh Harjain Cc: Russell King Cc: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

include/linux/genalloc.h: spinlock_t needs spinlock_types.h

2014-01-24T00:36:52Z

Compiling a C file which includes genalloc.h but without spinlock_types.h being included before, we will see the compile error below. include/linux/genalloc.h:54:2: error: unknown type name `spinlock_t' Include spinlock_types.h from genalloc.h to fix the problem. Signed-off-by: Shawn Guo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc: add a helper function for DMA buffer allocation

2013-11-13T03:09:22Z

When using pool space for DMA buffer, there might be duplicated calling of gen_pool_alloc() and gen_pool_virt_to_phys() in each implementation. Thus it's better to add a simple helper function, a compatible one to the common dma_alloc_coherent(), to save some code. Signed-off-by: Nicolin Chen Cc: "Hans J. Koch" Cc: Dan Williams Cc: Eric Miao Cc: Grant Likely Cc: Greg Kroah-Hartman Cc: Haojian Zhuang Cc: Jaroslav Kysela Cc: Kevin Hilman Cc: Liam Girdwood Cc: Mark Brown Cc: Mauro Carvalho Chehab Cc: Rob Herring Cc: Russell King Cc: Sekhar Nori Cc: Takashi Iwai Cc: Vinod Koul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: fix overflow of ending address of memory chunk

2013-09-11T22:57:35Z

In struct gen_pool_chunk, end_addr means the end address of memory chunk (inclusive), but in the implementation it is treated as address + size of memory chunk (exclusive), so it points to the address plus one instead of correct ending address. The ending address of memory chunk plus one will cause overflow on the memory chunk including the last address of memory map, e.g. when starting address is 0xFFF00000 and size is 0x100000 on 32bit machine, ending address will be 0x100000000. Use correct ending address like starting address + size - 1. [akpm@linux-foundation.org: add comment to struct gen_pool_chunk:end_addr] Signed-off-by: Joonyoung Shim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: add devres support, allow to find a managed pool by device

2013-04-30T01:28:13Z

This patch adds three exported functions to lib/genalloc.c: devm_gen_pool_create, dev_get_gen_pool, and of_get_named_gen_pool. devm_gen_pool_create is a managed version of gen_pool_create that keeps track of the pool via devres and allows the management code to automatically destroy it after device removal. dev_get_gen_pool retrieves the gen_pool for a given device, if it was created with devm_gen_pool_create, using devres_find. of_get_named_gen_pool retrieves the gen_pool for a given device node and property name, where the property must contain a phandle pointing to a platform device node. The corresponding platform device is then fed into dev_get_gen_pool and the resulting gen_pool is returned. [akpm@linux-foundation.org: make the of_get_named_gen_pool() stub static, fixing a zillion link errors] [akpm@linux-foundation.org: squish "struct device declared inside parameter list" warning] Signed-off-by: Philipp Zabel Acked-by: Grant Likely Tested-by: Michal Simek Cc: Fabio Estevam Cc: Matt Porter Cc: Dong Aisheng Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Paul Gortmaker Cc: Javier Martin Cc: Huang Shijie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds