John Garry a229cc14f3 dma-mapping: add dma_opt_mapping_size() ... Streaming DMA mapping involving an IOMMU may be much slower for larger total mapping size. This is because every IOMMU DMA mapping requires an IOVA to be allocated and freed. IOVA sizes above a certain limit are not cached, which can have a big impact on DMA mapping performance. Provide an API for device drivers to know this "optimal" limit, such that they may try to produce mapping which don't exceed it. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>		2022-07-19 06:05:41 +02:00
..
irq	irq: remove handle_domain_{irq,nmi}()	2021-10-26 10:13:31 +01:00
assoc_array.rst
boot-time-mm.rst
bus-virt-phys-mapping.rst	docs: core-api: avoid using ReST :doc:foo markup	2021-06-17 13:24:37 -06:00
cachetlb.rst	mm: Add flush_dcache_folio()	2021-10-18 07:49:36 -04:00
circular-buffers.rst
cpu_hotplug.rst	Documentation: core-api/cpuhotplug: Rewrite the API section	2021-09-11 00:41:21 +02:00
debug-objects.rst
debugging-via-ohci1394.rst	docs: debugging-via-ohci1394.txt: add it to the core-api book	2020-05-15 11:59:17 -06:00
dma-api-howto.rst	docs: move DMA kAPI to Documentation/core-api	2020-05-15 11:51:54 -06:00
dma-api.rst	dma-mapping: add dma_opt_mapping_size()	2022-07-19 06:05:41 +02:00
dma-attributes.rst	Reinstate some of "swiotlb: rework "fix info leak with DMA_FROM_DEVICE""	2022-03-28 11:37:05 -07:00
dma-isa-lpc.rst	docs: core-api: avoid using ReST :doc:foo markup	2021-06-17 13:24:37 -06:00
entry.rst	Documentation: core-api: entry: Add comments about nesting	2022-01-27 11:32:40 -07:00
errseq.rst
genalloc.rst	lib/genalloc.c: rename addr_in_gen_pool to gen_pool_has_addr	2019-12-04 19:44:13 -08:00
generic-radix-tree.rst
genericirq.rst	docs: genericirq.rst: don't document chip.c functions twice	2020-10-15 07:49:41 +02:00
gfp_mask-from-fs-io.rst
idr.rst	Core-api: Documentation: Replace deprecated :c:func: Usage	2020-08-11 10:26:08 -06:00
index.rst	It was a moderately busy cycle for documentation; highlights include:	2022-05-25 11:17:41 -07:00
kernel-api.rst	Convert xfs/iomap to use folios	2022-01-12 12:51:41 -08:00
kobject.rst	kobject documentation: remove default_attrs information	2022-01-07 11:23:37 +01:00
kref.rst	docs: move the kref doc into the core-api book	2020-05-15 12:02:19 -06:00
librs.rst
local_ops.rst
memory-allocation.rst	mm: slab: provide krealloc_array()	2020-12-15 12:13:37 -08:00
memory-hotplug.rst	mm/memory_hotplug: remove HIGHMEM leftovers	2021-11-06 13:30:42 -07:00
mm-api.rst	mm: document and polish read-ahead code	2022-03-22 15:57:00 -07:00
packing.rst
padata.rst	padata: fold padata_alloc_possible() into padata_alloc()	2020-07-23 17:34:18 +10:00
pin_user_pages.rst	mm: Make compound_pincount always available	2022-03-21 12:56:35 -04:00
printk-basics.rst	printk: Move the printk() kerneldoc comment to its new home	2021-07-26 12:36:44 +02:00
printk-formats.rst	vsprintf: Update %pGp documentation about that it prints hex value	2021-11-01 15:55:06 +01:00
printk-index.rst	printk/index: Printk index feature documentation	2022-04-13 14:25:31 +02:00
protection-keys.rst	x86/Kconfig: Update config and kernel doc for MPK feature on AMD	2020-05-28 18:27:40 +02:00
rbtree.rst	docs: rbtree.rst: Fix a typo	2021-03-25 11:38:51 -06:00
refcount-vs-atomic.rst
symbol-namespaces.rst	docs/core-api: Consistent code style	2021-05-03 16:52:50 -06:00
this_cpu_ops.rst	docs: move other kAPI documents to core-api	2020-06-26 11:33:42 -06:00
timekeeping.rst	timekeeping: Introduce fast accessor to clock tai	2022-04-14 16:19:30 +02:00
tracepoint.rst
unaligned-memory-access.rst	docs: move other kAPI documents to core-api	2020-06-26 11:33:42 -06:00
watch_queue.rst	Documentation: move watch_queue to core-api	2022-04-22 09:47:25 -06:00
workqueue.rst	workqueue: doc: Call out the non-reentrance conditions	2021-10-25 07:18:40 -10:00
xarray.rst	XArray: Document the locking requirement for the xa_state	2022-02-03 15:56:50 -05:00