This series: * removes the swiotlb_(arch_)_phys_to_bus and bus_to_phys __weak hooks, replacing them with an architecture-specific phys_to_dma and dma_to_phys interface. These are used by both PowerPC and Xen to provide the correct mapping from physical to DMA addresses. * removes the swiotlb_address_needs_mapping and swiotlb_range_needs_mapping __weak functions as well as is_buffer_dma_capable (which should never have been a generic function). All three are replaced by a single architecture-specific interface which meets the needs of both PowerPC and Xen. * removes the swiotlb_virt_to_bus __weak function and replaces it with a CONFIG_HIGHMEM compatible version when high memory is in use. This is needed for 32 bit PowerPC swiotlb support. * removes the swiotlb_alloc* __weak functions and replaces them with swiotlb_init_with_buffer which allows the use of a caller allocated buffer (and emergency pool).
I think these new interfaces are cleaner than the existing __weak functions and isolate the swiotlb code from architecture internals. This series does not contain any Xen or PowerPC specific changes, those will follow in separate postings. The complete patchset has been boot tested under Xen and native-x86 and compiled for IA64 and PowerPC Changes since v1: - Fixed compile error in swiotlb_dma_to_virt highmem version. Moved #ifdef into function to avoid prototype drift. - checkpatch fixes. - missed a swiotlb_arch_range_needs_mapping in swiotlb.h and x86 pci-swiotlb.c and swiotlb_bus_to_phys/phys_to_bus implementations in x86. - additionally replaced __weak swiotlb_alloc* with swiotlb_init_with_buffer. Signed-off-by: Ian Campbell <[email protected]> Cc: Becky Bruce <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: FUJITA Tomonori <[email protected]> Cc: Greg KH <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jeremy Fitzhardinge <[email protected]> Cc: Kumar Gala <[email protected]> Cc: Olaf Kirch <[email protected]> Cc: Tony Luck <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] _______________________________________________ Linuxppc-dev mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-dev
