9 Kernel routines

8,468 pages in section 9.

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datagram_poll generic datagram poll

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ddt Compute the derivative of the input function

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dma_alloc_from_coherent try to allocate memory from the per-device coherent area
dma_buf_attach Add the device to dma_buf's attachments list; optionally, calls attach of dma_buf_ops to allow device-specific attach functionality
dma_buf_begin_cpu_access Must be called before accessing a dma_buf from the cpu in the kernel context. Calls begin_cpu_access to allow exporter-specific preparations. Coherency is only guaranteed in the specified range for the specified access direction.
dma_buf_detach Remove the given attachment from dmabuf's attachments list; optionally calls detach of dma_buf_ops for device-specific detach
dma_buf_end_cpu_access Must be called after accessing a dma_buf from the cpu in the kernel context. Calls end_cpu_access to allow exporter-specific actions. Coherency is only guaranteed in the specified range for the specified access direction.
dma_buf_export_named Creates a new dma_buf, and associates an anon file with this buffer, so it can be exported. Also connect the allocator specific data and ops to the buffer. Additionally, provide a name string for exporter; useful in debugging.
dma_buf_fd returns a file descriptor for the given dma_buf
dma_buf_get returns the dma_buf structure related to an fd
dma_buf_kmap Map a page of the buffer object into kernel address space. The same restrictions as for kmap and friends apply.
dma_buf_kmap_atomic Map a page of the buffer object into kernel address space. The same restrictions as for kmap_atomic and friends apply.
dma_buf_kunmap Unmap a page obtained by dma_buf_kmap.
dma_buf_kunmap_atomic Unmap a page obtained by dma_buf_kmap_atomic.
dma_buf_map_attachment Returns the scatterlist table of the attachment; mapped into _device_ address space. Is a wrapper for map_dma_buf of the dma_buf_ops.
dma_buf_mmap Setup up a userspace mmap with the given vma
dma_buf_put decreases refcount of the buffer
dma_buf_unmap_attachment unmaps and decreases usecount of the buffer;might deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf of dma_buf_ops.
dma_buf_vmap Create virtual mapping for the buffer object into kernel address space. Same restrictions as for vmap and friends apply.
dma_buf_vunmap Unmap a vmap obtained by dma_buf_vmap.
dma_mmap_from_coherent try to mmap the memory allocated from per-device coherent memory pool to userspace
dma_pool_alloc get a block of consistent memory
dma_pool_create Creates a pool of consistent memory blocks, for dma.
dma_pool_destroy destroys a pool of dma memory blocks.
dma_pool_free put block back into dma pool
dma_release_from_coherent try to free the memory allocated from per-device coherent memory pool
dmam_alloc_coherent Managed dma_alloc_coherent
dmam_alloc_noncoherent Managed dma_alloc_noncoherent
dmam_declare_coherent_memory Managed dma_declare_coherent_memory
dmam_free_coherent Managed dma_free_coherent
dmam_free_noncoherent Managed dma_free_noncoherent
dmam_pool_create Managed dma_pool_create
dmam_pool_destroy Managed dma_pool_destroy
dmam_release_declared_memory Managed dma_release_declared_memory.
dmi_check_system check system DMI data
dmi_find_device find onboard device by type/name
dmi_first_match find dmi_system_id structure matching system DMI data
dmi_get_date parse a DMI date
dmi_get_system_info return DMI data value
dmi_match compare a string to the dmi field (if exists)
dmi_name_in_vendors Check if string is in the DMI system or board vendor name
dmi_walk Walk the DMI table and get called back for every record

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