iio_device_alloc – allocate an iio_dev from a driver Synopsis struct iio_dev *iio_device_alloc(int sizeof_priv); Arguments sizeof_priv Space to allocate for private structure. Author Daniel Baluta <daniel.baluta [at] intel.com> Author. Copyright
iio_buffer_put – Release the reference to the buffer Synopsis void iio_buffer_put(struct iio_buffer *buffer); Arguments buffer The buffer to release the reference for, may be NULL Author Daniel Baluta <daniel.baluta [at] intel.com> Author. Copyright
iio_buffer_get – Grab a reference to the buffer Synopsis struct iio_buffer *iio_buffer_get(struct iio_buffer *buffer); Arguments buffer The buffer to grab a reference for, may be NULL Description Returns the pointer to the buffer that was passed into the function. Author Daniel Baluta <daniel.baluta [at] intel.com> Author. Copyright
iget_locked – obtain an inode from a mounted file system Synopsis struct inode *iget_locked(struct super_block *sb, unsigned long ino); Arguments sb super block of file system ino inode number to get Description Search for the inode specified by ino in the inode cache and if present return it with an increased reference count. This is…
iget_failed – Mark an under-construction inode as dead and release it Synopsis void iget_failed(struct inode *inode); Arguments inode The inode to discard Description Mark an under-construction inode as dead and release it. Copyright
iget5_locked – obtain an inode from a mounted file system Synopsis struct inode *iget5_locked(struct super_block *sb, unsigned long hashval, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *data); Arguments sb super block of file system hashval hash value (usually inode number) to get test callback used for comparisons between inodes…
idr_replace – replace pointer for given id Synopsis void *idr_replace(struct idr *idp, void *ptr, int id); Arguments idp idr handle ptr pointer you want associated with the id id lookup key Description Replace the pointer registered with an id and return the old value. A -ENOENT return indicates that id was not found. A -EINVAL…
idr_remove – remove the given id and free its slot Synopsis void idr_remove(struct idr *idp, int id); Arguments idp idr handle id unique key Copyright
idr_preload – preload for idr_alloc Synopsis void idr_preload(gfp_t gfp_mask); Arguments gfp_mask allocation mask to use for preloading Description Preload per-cpu layer buffer for idr_alloc. Can only be used from process context and each idr_preload invocation should be matched with idr_preload_end. Note that preemption is disabled while preloaded. The first idr_alloc in the preloaded section can…
idr_init – initialize idr handle Synopsis void idr_init(struct idr *idp); Arguments idp idr handle Description This function is use to set up the handle (idp) that you will pass to the rest of the functions. Copyright
idr_get_next – lookup next object of id to given id. Synopsis void *idr_get_next(struct idr *idp, int *nextidp); Arguments idp idr handle nextidp pointer to lookup key Description Returns pointer to registered object with id, which is next number to given id. After being looked up, *nextidp will be updated for the next iteration. This function…
idr_for_each – iterate through all stored pointers Synopsis int idr_for_each(struct idr *idp, int (*fn)(int id, void *p, void *data), void *data); Arguments idp idr handle fn function to be called for each pointer data data passed back to callback function Description Iterate over the pointers registered with the given idr. The callback function will be…
idr_destroy – release all cached layers within an idr tree Synopsis void idr_destroy(struct idr *idp); Arguments idp idr handle Description Free all id mappings and all idp_layers. After this function, idp is completely unused and can be freed / recycled. The caller is responsible for ensuring that no one else accesses idp during or after…
idr_alloc_cyclic – allocate new idr entry in a cyclical fashion Synopsis int idr_alloc_cyclic(struct idr *idr, void *ptr, int start, int end, gfp_t gfp_mask); Arguments idr the (initialized) idr ptr pointer to be associated with the new id start the minimum id (inclusive) end the maximum id (exclusive, <= 0 for max) gfp_mask memory allocation flags…
idr_alloc – allocate new idr entry Synopsis int idr_alloc(struct idr *idr, void *ptr, int start, int end, gfp_t gfp_mask); Arguments idr the (initialized) idr ptr pointer to be associated with the new id start the minimum id (inclusive) end the maximum id (exclusive, <= 0 for max) gfp_mask memory allocation flags Description Allocate an id…
ida_simple_remove – remove an allocated id. Synopsis void ida_simple_remove(struct ida *ida, unsigned int id); Arguments ida the (initialized) ida. id the id returned by ida_simple_get. Copyright
ida_simple_get – get a new id. Synopsis int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end, gfp_t gfp_mask); Arguments ida the (initialized) ida. start the minimum id (inclusive, < 0x8000000) end the maximum id (exclusive, < 0x8000000 or 0) gfp_mask memory allocation flags Description Allocates an id in the range start <= id <…
ida_remove – remove the given ID Synopsis void ida_remove(struct ida *ida, int id); Arguments ida ida handle id ID to free Copyright
ida_pre_get – reserve resources for ida allocation Synopsis int ida_pre_get(struct ida *ida, gfp_t gfp_mask); Arguments ida ida handle gfp_mask memory allocation flag Description This function should be called prior to locking and calling the following function. It preallocates enough memory to satisfy the worst possible allocation. If the system is REALLY out of memory this…
ida_init – initialize ida handle Synopsis void ida_init(struct ida *ida); Arguments ida ida handle Description This function is use to set up the handle (ida) that you will pass to the rest of the functions. Copyright