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/linux/arch/arm/mm/
H A Ddma-mapping.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mm/dma-mapping.c
5 * Copyright (C) 2000-2004 Russell King
17 #include <linux/dma-direct.h>
18 #include <linux/dma-map-ops.h>
28 #include <asm/page.h>
33 #include <asm/dma-iommu.h>
36 #include <asm/xen/xen-ops.h>
43 size_t size; member
53 size_t size; member
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/linux/kernel/dma/
H A Ddirect.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2018-2020 Christoph Hellwig.
10 #include <linux/dma-map-ops.h>
21 * override the variable below for dma-direct to work properly.
33 static inline struct page *dma_direct_to_page(struct device *dev, in dma_direct_to_page()
41 phys_addr_t phys = (phys_addr_t)(max_pfn - 1) << PAGE_SHIFT; in dma_direct_get_required_mask()
44 return (1ULL << (fls64(max_dma) - 1)) * 2 - 1; in dma_direct_get_required_mask()
50 dev->coherent_dma_mask, in dma_direct_optimal_gfp_mask()
51 dev->bus_dma_limit); in dma_direct_optimal_gfp_mask()
69 bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size) in dma_coherent_ok() argument
[all …]
H A Dops_helpers.c1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/dma-map-ops.h>
7 #include <linux/iommu-dma.h>
9 static struct page *dma_common_vaddr_to_page(void *cpu_addr) in dma_common_vaddr_to_page()
17 * Create scatter-list for the already allocated DMA buffer.
20 void *cpu_addr, dma_addr_t dma_addr, size_t size, in dma_common_get_sgtable() argument
23 struct page *page = dma_common_vaddr_to_page(cpu_addr); in dma_common_get_sgtable() local
28 sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); in dma_common_get_sgtable()
33 * Create userspace mapping for the DMA-coherent memory.
36 void *cpu_addr, dma_addr_t dma_addr, size_t size, in dma_common_mmap() argument
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H A Dpool.c1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/dma-map-ops.h>
9 #include <linux/dma-direct.h>
23 /* Size can be defined by the coherent_pool command line */
46 static void dma_atomic_pool_size_add(gfp_t gfp, size_t size) in dma_atomic_pool_size_add() argument
49 pool_size_dma += size; in dma_atomic_pool_size_add()
51 pool_size_dma32 += size; in dma_atomic_pool_size_add()
53 pool_size_kernel += size; in dma_atomic_pool_size_add()
58 unsigned long size; in cma_in_zone() local
66 size = cma_get_size(cma); in cma_in_zone()
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H A Dcontiguous.c1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (c) 2010-2011 by Samsung Electronics.
17 * Various devices on embedded systems have no scatter-getter and/or
30 * inaccessible to page system even if device drivers don't use it.
40 #include <asm/page.h>
45 #include <linux/dma-map-ops.h>
58 * Default global CMA area size can be defined in kernel's .config.
61 * The size can be set in bytes or as a percentage of the total memory
64 * Users, who want to set the size of global CMA area for their system
69 static phys_addr_t size_cmdline __initdata = -1;
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/linux/include/net/page_pool/
H A Dhelpers.h1 /* SPDX-License-Identifier: GPL-2.0
11 * The page_pool allocator is optimized for recycling page or page fragment used
15 * which allocate memory with or without page splitting depending on the
16 * requested memory size.
19 * always smaller than half a page, it can use one of the more specific API
22 * 1. page_pool_alloc_pages(): allocate memory without page splitting when
23 * driver knows that the memory it need is always bigger than half of the page
24 * allocated from page pool. There is no cache line dirtying for 'struct page'
25 * when a page is recycled back to the page pool.
27 * 2. page_pool_alloc_frag(): allocate memory with page splitting when driver
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/linux/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/
H A Dvmm.c32 kvfree(pgt->pde); in nvkm_vmm_pt_del()
41 const struct nvkm_vmm_page *page) in nvkm_vmm_pt_new() argument
43 const u32 pten = 1 << desc->bits; in nvkm_vmm_pt_new()
47 if (desc->type > PGT) { in nvkm_vmm_pt_new()
48 if (desc->type == SPT) { in nvkm_vmm_pt_new()
49 const struct nvkm_vmm_desc *pair = page[-1].desc; in nvkm_vmm_pt_new()
50 lpte = pten >> (desc->bits - pair->bits); in nvkm_vmm_pt_new()
58 pgt->page = page ? page->shift : 0; in nvkm_vmm_pt_new()
59 pgt->sparse = sparse; in nvkm_vmm_pt_new()
61 if (desc->type == PGD) { in nvkm_vmm_pt_new()
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H A Duvmm.c42 return nvkm_vmm_ref(nvkm_uvmm(object)->vmm); in nvkm_uvmm_search()
51 struct nvkm_vmm *vmm = uvmm->vmm; in nvkm_uvmm_mthd_pfnclr()
52 int ret = -ENOSYS; in nvkm_uvmm_mthd_pfnclr()
53 u64 addr, size; in nvkm_uvmm_mthd_pfnclr() local
55 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) { in nvkm_uvmm_mthd_pfnclr()
56 addr = args->v0.addr; in nvkm_uvmm_mthd_pfnclr()
57 size = args->v0.size; in nvkm_uvmm_mthd_pfnclr()
61 if (nvkm_vmm_in_managed_range(vmm, addr, size) && vmm->managed.raw) in nvkm_uvmm_mthd_pfnclr()
62 return -EINVAL; in nvkm_uvmm_mthd_pfnclr()
64 if (size) { in nvkm_uvmm_mthd_pfnclr()
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/linux/sound/pci/emu10k1/
H A Dmemory.c1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * EMU10K1 memory page allocation (PTB area)
18 /* page arguments of these two macros are Emu page (4096 bytes), not like
21 #define __set_ptb_entry(emu,page,addr) \ argument
22 (((__le32 *)(emu)->ptb_pages.area)[page] = \
23 cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
24 #define __get_ptb_entry(emu, page) \ argument
25 (le32_to_cpu(((__le32 *)(emu)->ptb_pages.area)[page]))
30 /* get aligned page from offset address */
32 /* get offset address from aligned page */
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/linux/Documentation/admin-guide/mm/
H A Dtranshuge.rst12 that supports the automatic promotion and demotion of page sizes and
19 in the examples below we presume that the basic page size is 4K and
20 the huge page size is 2M, although the actual numbers may vary
26 requiring larger clear-page copy-page in page faults which is a
28 single page fault for each 2M virtual region touched by userland (so
43 larger size only if both KVM and the Linux guest are using
48 Modern kernels support "multi-size THP" (mTHP), which introduces the
49 ability to allocate memory in blocks that are bigger than a base page
50 but smaller than traditional PMD-size (as described above), in
51 increments of a power-of-2 number of pages. mTHP can back anonymous
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/linux/mm/
H A Ddmapool.c1 // SPDX-License-Identifier: GPL-2.0-only
9 * This allocator returns small blocks of a given size which are DMA-able by
10 * the given device. It uses the dma_alloc_coherent page allocator to get
11 * new pages, then splits them up into blocks of the required size.
15 * represented by the 'struct dma_pool' which keeps a doubly-linked list of
16 * allocated pages. Each page in the page_list is split into blocks of at
17 * least 'size' bytes. Free blocks are tracked in an unsorted singly-linked
19 * keep a count of how many are currently allocated from each page.
23 #include <linux/dma-mapping.h>
56 unsigned int size; member
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H A Dzbud.c1 // SPDX-License-Identifier: GPL-2.0-only
12 * page.
19 * single memory page called a "zbud page". The first buddy is "left
20 * justified" at the beginning of the zbud page, and the last buddy is "right
21 * justified" at the end of the zbud page. The benefit is that if either
24 * within the zbud page
127 size_to_chunks(size_t size) size_to_chunks() argument
136 init_zbud_page(struct page * page) init_zbud_page() argument
246 zbud_alloc(struct zbud_pool * pool,size_t size,gfp_t gfp,unsigned long * handle) zbud_alloc() argument
252 struct page *page; zbud_alloc() local
393 zbud_zpool_malloc(void * pool,size_t size,gfp_t gfp,unsigned long * handle) zbud_zpool_malloc() argument
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/linux/drivers/vdpa/vdpa_user/
H A Diova_domain.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * MMU-based software IOTLB.
5 * Copyright (C) 2020-2021 Bytedance Inc. and/or its affiliates. All rights reserved.
30 return -ENOMEM; in vduse_iotlb_add_range()
32 map_file->file = get_file(file); in vduse_iotlb_add_range()
33 map_file->offset = offset; in vduse_iotlb_add_range()
35 ret = vhost_iotlb_add_range_ctx(domain->iotlb, start, last, in vduse_iotlb_add_range()
38 fput(map_file->file); in vduse_iotlb_add_range()
51 while ((map = vhost_iotlb_itree_first(domain->iotlb, start, last))) { in vduse_iotlb_del_range()
52 map_file = (struct vdpa_map_file *)map->opaque; in vduse_iotlb_del_range()
[all …]
/linux/drivers/misc/
H A Dvmw_balloon.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2000-2018, VMware, Inc. All Rights Reserved.
46 …"Enable non-cooperative out-of-memory protection. Disabled by default as it may degrade performanc…
54 /* Magic number for the balloon mount-point */
80 #define VMW_BALLOON_2M_ORDER (PMD_SHIFT - PAGE_SHIFT)
83 * 64-bit targets are only supported in 64-bit
118 * enum vmballoon_cmd_type - backdoor commands.
140 * @VMW_BALLOON_CMD_GET_TARGET: Gets the balloon target size.
141 * @VMW_BALLOON_CMD_LOCK: Informs the hypervisor about a ballooned page.
142 * @VMW_BALLOON_CMD_UNLOCK: Informs the hypervisor about a page that is about
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/linux/arch/powerpc/include/asm/nohash/32/
H A Dmmu-8xx.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 * During software tablewalk, the registers used perform mask/shift-add
34 * Then we use the APG to say whether accesses are according to Page rules or
39 * 0 => Kernel => 11 (all accesses performed according as user iaw page definition)
40 * 1 => Kernel+Accessed => 01 (all accesses performed according to page definition)
41 * 2 => User => 11 (all accesses performed according as user iaw page definition)
42 * 3 => User+Accessed => 10 (all accesses performed according to swaped page definition) for KUEP
43 * 4-15 => Not Used
47 /* The effective page number register. When read, contains the information
52 #define MI_EPNMASK 0xfffff000 /* Effective page number for entry */
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/linux/include/linux/
H A Ddma-map-ops.h1 /* SPDX-License-Identifier: GPL-2.0 */
9 #include <linux/dma-mapping.h>
17 void *(*alloc)(struct device *dev, size_t size,
20 void (*free)(struct device *dev, size_t size, void *vaddr,
22 struct page *(*alloc_pages_op)(struct device *dev, size_t size,
25 void (*free_pages)(struct device *dev, size_t size, struct page *vaddr,
31 void *cpu_addr, dma_addr_t dma_addr, size_t size,
34 dma_addr_t (*map_page)(struct device *dev, struct page *page,
35 unsigned long offset, size_t size,
38 size_t size, enum dma_data_direction dir,
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/linux/lib/
H A Diov_iter.c1 // SPDX-License-Identifier: GPL-2.0-only
4 #include <linux/fault-inject-usercopy.h>
78 * fault_in_iov_iter_readable - fault in iov iterator for reading
80 * @size: maximum length
83 * @size. For each iovec, fault in each page that constitutes the iovec.
88 * Always returns 0 for non-userspace iterators.
90 size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t size) in fault_in_iov_iter_readable() argument
93 size_t n = min(size, iov_iter_count(i)); in fault_in_iov_iter_readable()
94 n -= fault_in_readable(i->ubuf + i->iov_offset, n); in fault_in_iov_iter_readable()
95 return size - n; in fault_in_iov_iter_readable()
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/linux/arch/powerpc/mm/
H A Ddma-noncoherent.c1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/dma-direct.h>
14 #include <linux/dma-map-ops.h>
22 static void __dma_sync(void *vaddr, size_t size, int direction) in __dma_sync() argument
25 unsigned long end = start + size; in __dma_sync()
32 * invalidate only when cache-line aligned otherwise there is in __dma_sync()
35 if ((start | end) & (L1_CACHE_BYTES - 1)) in __dma_sync()
52 * In this case, each page of a buffer must be kmapped/kunmapped
57 * beyond the first page.
59 static inline void __dma_sync_page_highmem(struct page *page, in __dma_sync_page_highmem() argument
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/linux/fs/hfsplus/
H A Dbitmap.c1 // SPDX-License-Identifier: GPL-2.0
19 int hfsplus_block_allocate(struct super_block *sb, u32 size, in hfsplus_block_allocate() argument
23 struct page *page; in hfsplus_block_allocate() local
32 return size; in hfsplus_block_allocate()
34 hfs_dbg(BITMAP, "block_allocate: %u,%u,%u\n", size, offset, len); in hfsplus_block_allocate()
35 mutex_lock(&sbi->alloc_mutex); in hfsplus_block_allocate()
36 mapping = sbi->alloc_file->i_mapping; in hfsplus_block_allocate()
37 page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS, NULL); in hfsplus_block_allocate()
38 if (IS_ERR(page)) { in hfsplus_block_allocate()
39 start = size; in hfsplus_block_allocate()
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/linux/sound/pci/trident/
H A Dtrident_memory.c1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * Trident 4DWave-NX memory page allocation (TLB area)
19 /* page arguments of these two macros are Trident page (4096 bytes), not like
22 #define __set_tlb_bus(trident,page,addr) \ argument
23 (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1))
24 #define __tlb_to_addr(trident,page) \ argument
25 (dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
28 /* page size == SNDRV_TRIDENT_PAGE_SIZE */
29 #define ALIGN_PAGE_SIZE PAGE_SIZE /* minimum page size for allocation */
31 /* fill TLB entrie(s) corresponding to page with ptr */
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/linux/drivers/gpu/drm/imagination/
H A Dpvr_mmu.c1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
17 #include <linux/dma-mapping.h>
23 #define PVR_MASK_FROM_SIZE(size_) (~((size_) - U64_C(1)))
26 * The value of the device page size (%PVR_DEVICE_PAGE_SIZE) is currently
27 * pegged to the host page size (%PAGE_SIZE). This chunk of macro goodness both
28 * ensures that the selected host page size corresponds to a valid device page
29 * size and sets up values needed by the MMU code below.
56 # error Unsupported device page size PVR_DEVICE_PAGE_SIZE
61 (PVR_DEVICE_PAGE_SHIFT - PVR_SHIFT_FROM_SIZE(SZ_4K)))
64 PVR_MMU_SYNC_LEVEL_NONE = -1,
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/linux/kernel/module/
H A Ddecompress.c1 // SPDX-License-Identifier: GPL-2.0-or-later
19 struct page **new_pages; in module_extend_max_pages()
21 new_pages = kvmalloc_array(info->max_pages + extent, in module_extend_max_pages()
22 sizeof(info->pages), GFP_KERNEL); in module_extend_max_pages()
24 return -ENOMEM; in module_extend_max_pages()
26 memcpy(new_pages, info->pages, info->max_pages * sizeof(info->pages)); in module_extend_max_pages()
27 kvfree(info->pages); in module_extend_max_pages()
28 info->pages = new_pages; in module_extend_max_pages()
29 info->max_pages += extent; in module_extend_max_pages()
34 static struct page *module_get_next_page(struct load_info *info) in module_get_next_page()
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/linux/mm/kmsan/
H A Dshadow.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2017-2022 Google LLC
22 #define shadow_page_for(page) ((page)->kmsan_shadow) argument
24 #define origin_page_for(page) ((page)->kmsan_origi argument
26 shadow_ptr_for(struct page * page) shadow_ptr_for() argument
31 origin_ptr_for(struct page * page) origin_ptr_for() argument
36 page_has_metadata(struct page * page) page_has_metadata() argument
41 set_no_shadow_origin_page(struct page * page) set_no_shadow_origin_page() argument
81 kmsan_get_shadow_origin_ptr(void * address,u64 size,bool store) kmsan_get_shadow_origin_ptr() argument
127 struct page *page; kmsan_get_metadata() local
170 kmsan_alloc_page(struct page * page,unsigned int order,gfp_t flags) kmsan_alloc_page() argument
205 kmsan_free_page(struct page * page,unsigned int order) kmsan_free_page() argument
278 struct page *page; kmsan_init_alloc_meta_for_range() local
279 u64 size; kmsan_init_alloc_meta_for_range() local
301 kmsan_setup_meta(struct page * page,struct page * shadow,struct page * origin,int order) kmsan_setup_meta() argument
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/linux/tools/testing/selftests/mm/
H A Dcow.c1 // SPDX-License-Identifier: GPL-2.0-only
44 static int sz2ord(size_t size) in sz2ord() argument
46 return __builtin_ctzll(size / pagesize); in sz2ord()
69 ksft_print_msg("[INFO] detected THP size: %zu KiB\n", kb); in detect_thp_sizes()
100 static bool range_is_swapped(void *addr, size_t size) in range_is_swapped() argument
102 for (; size; addr += pagesize, size -= pagesize) in range_is_swapped()
115 if (pipe(comm_pipes->child_ready) < 0) in setup_comm_pipes()
116 return -errno; in setup_comm_pipes()
117 if (pipe(comm_pipes->parent_ready) < 0) { in setup_comm_pipes()
118 close(comm_pipes->child_ready[0]); in setup_comm_pipes()
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/linux/drivers/nvmem/
H A Drave-sp-eeprom.c1 // SPDX-License-Identifier: GPL-2.0+
10 #include <linux/mfd/rave-sp.h>
12 #include <linux/nvmem-provider.h>
18 * enum rave_sp_eeprom_access_type - Supported types of EEPROM access
29 * enum rave_sp_eeprom_header_size - EEPROM command header sizes
31 * @RAVE_SP_EEPROM_HEADER_SMALL: EEPROM header size for "small" devices (< 8K)
32 * @RAVE_SP_EEPROM_HEADER_BIG: EEPROM header size for "big" devices (> 8K)
43 * struct rave_sp_eeprom_page - RAVE SP EEPROM page
59 * struct rave_sp_eeprom - RAVE SP EEPROM device
64 * @header_size: Size of EEPROM command header for this device
[all …]

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