search for: guanteed

...enum dma_data_direction dir, gfp_t gfp) > + > +This routine allocates a region of <size> bytes of consistent memory. It > +returns a pointer to the allocated region (in the processor's virtual address > +space) or NULL if the allocation failed. The returned memory is guanteed to > +behave like memory allocated using alloc_pages. There is one aspect that the existing dma_alloc_attrs() handles, but this new function doesn't: IOMMU support. The function will always allocate a physically-contiguous block memory, which is a costly operation and not even guaranteed to...

...dma_addr_t *dma_handle, + enum dma_data_direction dir, gfp_t gfp) + +This routine allocates a region of <size> bytes of consistent memory. It +returns a pointer to the allocated region (in the processor's virtual address +space) or NULL if the allocation failed. The returned memory is guanteed to +behave like memory allocated using alloc_pages. + +It also returns a <dma_handle> which may be cast to an unsigned integer the +same width as the bus and given to the device as the DMA address base of +the region. -Identical to dma_alloc_coherent() except that when the -DMA_ATTR_NON_CON...

Hi all, this series replaced the DMA_ATTR_NON_CONSISTENT flag to dma_alloc_attrs with a separate new dma_alloc_pages API, which is available on all platforms. In addition to cleaning up the convoluted code path, this ensures that other drivers that have asked for better support for non-coherent DMA to pages with incurring bounce buffering over can finally be properly supported. I'm still a