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/linux-6.15/Documentation/core-api/
H A Dswiotlb.rst14 temporary memory buffer is called a "bounce buffer".
21 freeing, and sync'ing of bounce buffers. Since the DMA attributes are per
41 to force all DMA I/O to use bounce buffers, and the bounce buffer memory is set
56 operation and ensuring that unused portions of the bounce buffers do not
132 the bounce buffer. Similarly, the end of the bounce buffer is rounded up to an
157 bounce buffers. Furthermore, a bounce buffer must be allocated from a single
196 the amount of memory available for allocation as bounce buffers. If a bounce
263 identifier for a bounce buffer. This address is returned by
279 occupied by the bounce buffer. An adjusted "alloc_size" of the bounce buffer is
292 a new bounce buffer and when freeing a bounce buffer. At pool creation time, the
[all …]
/linux-6.15/lib/
H A Dtest_hmm.c131 bounce->addr = addr; in dmirror_bounce_init()
133 bounce->cpages = 0; in dmirror_bounce_init()
135 if (!bounce->ptr) in dmirror_bounce_init()
157 vfree(bounce->ptr); in dmirror_bounce_fini()
367 ptr = bounce->ptr + ((start - bounce->addr) & PAGE_MASK); in dmirror_do_read()
381 bounce->cpages++; in dmirror_do_read()
419 bounce.size)) in dmirror_read()
433 ptr = bounce->ptr + ((start - bounce->addr) & PAGE_MASK); in dmirror_do_write()
447 bounce->cpages++; in dmirror_do_write()
815 bounce.size)) in dmirror_exclusive()
[all …]
/linux-6.15/arch/s390/mm/
H A Dmaccess.c154 void *bounce = ptr; in xlate_dev_mem_ptr() local
166 bounce = (void *)__get_free_page(GFP_ATOMIC); in xlate_dev_mem_ptr()
167 if (!bounce) in xlate_dev_mem_ptr()
173 memcpy(bounce, ptr, size); in xlate_dev_mem_ptr()
177 memcpy(bounce, ptr, size); in xlate_dev_mem_ptr()
179 memcpy(bounce, ptr, size); in xlate_dev_mem_ptr()
184 return bounce; in xlate_dev_mem_ptr()
/linux-6.15/drivers/gpu/drm/
H A Ddrm_cache.c230 char bounce[MEMCPY_BOUNCE_SIZE]; in memcpy_fallback() local
235 memcpy_fromio(bounce, _src, MEMCPY_BOUNCE_SIZE); in memcpy_fallback()
236 memcpy_toio(_dst, bounce, MEMCPY_BOUNCE_SIZE); in memcpy_fallback()
242 memcpy_fromio(bounce, _src, MEMCPY_BOUNCE_SIZE); in memcpy_fallback()
243 memcpy_toio(_dst, bounce, MEMCPY_BOUNCE_SIZE); in memcpy_fallback()
/linux-6.15/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()
H A Dvmwgfx_devcaps.c56 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce, in vmw_fill_compat_cap() argument
60 (struct svga_3d_compat_cap *) bounce; in vmw_fill_compat_cap()
/linux-6.15/Documentation/devicetree/bindings/firmware/
H A Dbrcm,kona-smc.yaml7 title: Broadcom Kona family Secure Monitor bounce buffer
10 A bounce buffer used for non-secure to secure communications.
/linux-6.15/drivers/char/
H A Dmem.c106 char *bounce; in read_mem() local
130 bounce = kmalloc(PAGE_SIZE, GFP_KERNEL); in read_mem()
131 if (!bounce) in read_mem()
159 probe = copy_from_kernel_nofault(bounce, ptr, sz); in read_mem()
164 remaining = copy_to_user(buf, bounce, sz); in read_mem()
177 kfree(bounce); in read_mem()
183 kfree(bounce); in read_mem()
/linux-6.15/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-6.15/drivers/misc/eeprom/
H A Dat25.c205 u8 *bounce; in at25_ee_write() local
218 bounce = kmalloc(buf_size + at25->addrlen + 1, GFP_KERNEL); in at25_ee_write()
219 if (!bounce) in at25_ee_write()
231 u8 *cp = bounce; in at25_ee_write()
268 status = spi_write(at25->spi, bounce, in at25_ee_write()
315 kfree(bounce); in at25_ee_write()
/linux-6.15/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_lzma.c8 u8 bounce[PAGE_SIZE]; member
186 dctx.bounce = strm->bounce; in z_erofs_lzma_decompress()
H A Ddecompressor_zstd.c7 u8 bounce[PAGE_SIZE]; member
172 dctx.bounce = strm->bounce; in z_erofs_zstd_decompress()
H A Dcompress.h69 void *bounce; /* bounce buffer for inplace I/Os */ member
/linux-6.15/block/
H A Dbounce.c208 bool bounce = false; in __blk_queue_bounce() local
215 bounce = true; in __blk_queue_bounce()
217 if (!bounce) in __blk_queue_bounce()
/linux-6.15/fs/bcachefs/
H A Dio_read.c271 op->write.rbio.bounce = true; in __promote_alloc()
295 bool *bounce, in promote_alloc() argument
333 *bounce = true; in promote_alloc()
409 if (rbio->bounce) in bch2_rbio_free()
740 if (rbio->bounce) { in __bch2_read_endio()
805 if (rbio->bounce) { in __bch2_read_endio()
815 if (rbio->bounce) { in __bch2_read_endio()
1035 bounce = true; in __bch2_read_extent()
1086 } else if (bounce) { in __bch2_read_extent()
1097 rbio->bounce = true; in __bch2_read_extent()
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H A Dio_write_types.h29 bounce:1,
/linux-6.15/arch/loongarch/include/asm/
H A Dkvm_eiointc.h75 union bounce { union
80 } bounce; member
/linux-6.15/Documentation/devicetree/bindings/leds/
H A Dleds-el15203000.txt20 - bounce pattern
21 - inversed bounce pattern
/linux-6.15/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-6.15/arch/loongarch/kvm/intc/
H A Deiointc.c150 data = s->bounce.reg_u8[index]; in loongarch_eiointc_readb()
192 data = s->bounce.reg_u16[index]; in loongarch_eiointc_readw()
234 data = s->bounce.reg_u32[index]; in loongarch_eiointc_readl()
276 data = s->bounce.reg_u64[index]; in loongarch_eiointc_readq()
378 s->bounce.reg_u8[index] = data; in loongarch_eiointc_writeb()
464 s->bounce.reg_u16[index] = data; in loongarch_eiointc_writew()
550 s->bounce.reg_u32[index] = data; in loongarch_eiointc_writel()
636 s->bounce.reg_u64[index] = data; in loongarch_eiointc_writeq()
853 p = &s->bounce.reg_u32[offset]; in kvm_eiointc_regs_access()
/linux-6.15/drivers/gpu/drm/sun4i/
H A Dsun6i_mipi_dsi.c886 u8 *bounce; in sun6i_dsi_dcs_write_long() local
892 bounce = kzalloc(ALIGN(msg->tx_len + sizeof(crc), 4), GFP_KERNEL); in sun6i_dsi_dcs_write_long()
893 if (!bounce) in sun6i_dsi_dcs_write_long()
896 memcpy(bounce, msg->tx_buf, msg->tx_len); in sun6i_dsi_dcs_write_long()
899 crc = sun6i_dsi_crc_compute(bounce, msg->tx_len); in sun6i_dsi_dcs_write_long()
900 memcpy((u8 *)bounce + msg->tx_len, &crc, sizeof(crc)); in sun6i_dsi_dcs_write_long()
903 regmap_bulk_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(1), bounce, DIV_ROUND_UP(len, 4)); in sun6i_dsi_dcs_write_long()
905 kfree(bounce); in sun6i_dsi_dcs_write_long()
/linux-6.15/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()
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()
1500 if (!info->bounce) { in blkif_completion()
1783 info->bounce = !xen_blkif_trusted || in talk_to_blkback()
[all …]
/linux-6.15/drivers/mtd/nand/raw/
H A Dr852.c174 int bounce = 0; in r852_do_dma() local
193 bounce = 1; in r852_do_dma()
195 if (!bounce) { in r852_do_dma()
200 bounce = 1; in r852_do_dma()
203 if (bounce) { in r852_do_dma()
223 if (do_read && bounce) in r852_do_dma()
/linux-6.15/drivers/media/usb/go7007/
H A Dgo7007-driver.c82 void *bounce; in go7007_load_encoder() local
97 bounce = kmemdup(fw_entry->data + 16, fw_len, GFP_KERNEL); in go7007_load_encoder()
98 if (bounce == NULL) { in go7007_load_encoder()
105 go->boot_fw = bounce; in go7007_load_encoder()

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