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Searched refs:bounce (Results 1 – 24 of 24) sorted by relevance

/linux/Documentation/core-api/
H A Dswiotlb.rst13 memory buffer. This approach is generically called "bounce buffering", and the
14 temporary memory buffer is called a "bounce buffer".
20 if bounce buffering is necessary. If so, the DMA layer manages the allocation,
21 freeing, and sync'ing of bounce buffers. Since the DMA attributes are per
22 device, some devices in a system may use bounce buffering while others do not.
24 Because the CPU copies data between the bounce buffer and the original target
25 memory buffer, doing bounce buffering is slower than doing DMA directly to the
33 only provide 32-bit DMA addresses. By allocating bounce buffer memory below
41 to force all DMA I/O to use bounce buffers, and the bounce buffer memory is set
42 up as unencrypted. The host does DMA I/O to/from the bounce buffer memory, and
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H A Ddma-api.rst198 data to/from a bounce buffer if the kernel is configured with a
/linux/drivers/gpu/drm/vmwgfx/
H A Dvmwgfx_ioctl.c131 void *bounce = NULL; in vmw_get_cap_3d_ioctl() local
149 bounce = vzalloc(size); in vmw_get_cap_3d_ioctl()
150 if (unlikely(bounce == NULL)) { in vmw_get_cap_3d_ioctl()
155 ret = vmw_devcaps_copy(dev_priv, vmw_fp->gb_aware, bounce, size); in vmw_get_cap_3d_ioctl()
159 ret = copy_to_user(buffer, bounce, size); in vmw_get_cap_3d_ioctl()
163 vfree(bounce); in vmw_get_cap_3d_ioctl()
/linux/Documentation/i2c/
H A Ddma-considerations.rst49 bounce buffer. But you don't need to care about that detail, just use the
50 returned buffer. If NULL is returned, the threshold was not met or a bounce
54 function ensures a potentially used bounce buffer is freed::
62 The bounce buffer handling from the core is generic and simple. It will always
63 allocate a new bounce buffer. If you want a more sophisticated handling (e.g.
/linux/fs/erofs/
H A Ddecompressor_deflate.c8 u8 bounce[PAGE_SIZE]; member
141 dctx.bounce = strm->bounce; in __z_erofs_deflate_decompress()
H A Ddecompressor_zstd.c7 u8 bounce[PAGE_SIZE]; member
173 dctx.bounce = strm->bounce; in z_erofs_zstd_decompress()
H A Ddecompressor_lzma.c8 u8 bounce[PAGE_SIZE]; member
187 dctx.bounce = strm->bounce; in z_erofs_lzma_decompress()
H A Ddecompressor.c403 memcpy(dctx->bounce, *src, dctx->inbuf_sz); in z_erofs_stream_switch_bufs()
404 *src = dctx->bounce; in z_erofs_stream_switch_bufs()
/linux/Documentation/devicetree/bindings/leds/
H A Dleds-el15203000.txt20 - bounce pattern
21 - inversed bounce pattern
/linux/kernel/module/
H A Dsysfs.c32 char bounce[MODULE_SECT_READ_SIZE + 1]; in module_sect_read() local
46 wrote = scnprintf(bounce, sizeof(bounce), "0x%px\n", in module_sect_read()
50 memcpy(buf, bounce, count); in module_sect_read()
/linux/drivers/block/
H A Dxen-blkfront.c220 unsigned int bounce:1; member
321 if (info->bounce) { in fill_grant_buffer()
341 if (info->bounce) in fill_grant_buffer()
387 if (info->bounce) in get_grant()
411 if (!info->bounce) { in get_indirect_grant()
714 .need_copy = rq_data_dir(req) && info->bounce, in blkif_queue_rw_req()
1001 "bounce buffer:", info->bounce ? "enabled" : "disabled;"); in xlvbd_flush()
1220 BUG_ON(info->bounce); in blkif_free_ring()
1237 if (info->bounce) in blkif_free_ring()
1258 if (info->bounce) in blkif_free_ring()
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/linux/arch/loongarch/include/asm/
H A Dkvm_eiointc.h67 u64 bounce[EIOINTC_IRQS_U64_NUMS]; member
/linux/Documentation/leds/
H A Dleds-el15203000.rst114 Inverted bounce mode for Pipe LED::
/linux/drivers/gpu/drm/xe/
H A Dxe_oa_types.h171 void *bounce; member
/linux/kernel/dma/
H A DKconfig90 int "Default SWIOTLB bounce buffer size in MB"
95 Sets the default size of the software IO TLB (SWIOTLB) bounce buffer
112 bool "Dynamic allocation of DMA bounce buffers"
/linux/arch/arm/vfp/
H A Dvfpmodule.c775 goto bounce; in vfp_support_entry()
803 bounce: regs->ARM_pc += 4; in vfp_support_entry()
/linux/Documentation/virt/hyperv/
H A Dcoco.rst214 Linux kernel DMA APIs, and so bounce buffering through decrypted swiotlb
220 equivalent of bounce buffering between encrypted and decrypted memory is
222 DMA APIs, and is bounce buffered through swiotlb memory implicitly like in
271 provides bounce-buffering, and although the data is not encrypted, the backing
/linux/Documentation/driver-api/usb/
H A Ddma.rst83 This may force your callers to do some bounce buffering, copying from
/linux/fs/notify/fanotify/
H A Dfanotify_user.c560 unsigned char bounce[FANOTIFY_INLINE_FH_LEN], *fh_buf; in copy_fid_info_to_user() local
623 memcpy(bounce, fh_buf, fh_len); in copy_fid_info_to_user()
624 fh_buf = bounce; in copy_fid_info_to_user()
/linux/drivers/net/
H A Dxen-netfront.c181 bool bounce; member
761 if (np->bounce || unlikely(PAGE_SIZE - offset < ETH_HLEN)) { in xennet_start_xmit()
2272 info->bounce = !xennet_trusted || in talk_to_netback()
2442 if (np->bounce) in xennet_connect()
/linux/drivers/usb/dwc3/
H A Dgadget.c4756 dwc->bounce = dma_alloc_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, in dwc3_gadget_init()
4758 if (!dwc->bounce) { in dwc3_gadget_init()
4838 dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce, in dwc3_gadget_init()
4864 dma_free_coherent(dwc->sysdev, DWC3_BOUNCE_SIZE, dwc->bounce, in dwc3_gadget_exit()
/linux/arch/arm/boot/compressed/
H A Dhead.S651 __HVC(0) @ otherwise bounce to hyp mode
/linux/Documentation/arch/powerpc/
H A Dultravisor.rst177 * For virtual I/O to work bounce buffering must be done.
/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt2621 Use software bounce buffering (SWIOTLB) (default for
7527 force -- force using of bounce buffers even if they
7529 noforce -- Never use bounce buffers (for debugging)