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e7219e53c5
linux/rust/kernel
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Gary Guo e7219e53c5 rust: io: add copying methods 
One feature that was lost from the old `dma_read!` and `dma_write!` when
moving to `io_read!` and `io_write!` was the ability to read/write a large
structs. However, the semantics was unclear to begin with, as there was no
guarantee about their atomicity even for structs that were small enough to
fit in u32. Re-introduce the capability in the form of copying methods.

    dma_read!(foo, bar) -> io_project!(foo, bar).copy_read()
    dma_write!(foo, bar, baz) -> io_project!(foo, bar).copy_write(baz)

Model these semantics after memcpy so user has clear expectation of lack of
atomicity. As an additional benefit of this change, this now works for MMIO
as well by mapping them to `memcpy_{from,to}io`.

For slices which is DST so the `copy_read` and `copy_write` API above can't
work, add `copy_from_slice` and `copy_to_slice` to copy from/to normal
memory.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260706-io_projection-v6-19-72cd5d055d54@garyguo.net
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-07-11 18:09:04 +02:00
..
alloc Driver core changes for 7.2-rc1 2026-06-15 12:41:17 +05:30
block rust: block: fix GenDisk cleanup paths 2026-05-31 19:45:06 -06:00
debugfs Driver core changes for 7.0-rc1 2026-02-11 17:43:59 -08:00
device rust: device: replace kernel::c_str! with C-Strings 2025-12-22 17:30:24 +01:00
drm rust/drm/gem: Use DeviceContext with GEM objects 2026-06-02 22:51:16 +02:00
fs rust: fs: add file::Offset type alias 2025-11-05 00:05:38 +01:00
gpu rust: gpu: Add GPU buddy allocator bindings 2026-03-23 21:41:47 +01:00
interop rust: interop: Add list module for C linked list interface 2026-03-23 20:29:28 +01:00
io rust: io: move Io methods to extension trait 2026-07-11 18:07:41 +02:00
iommu rust: iommu: fix srctree link warning 2026-01-22 09:19:30 +01:00
irq rust: irq: move 'static bounds to traits 2026-03-03 20:33:26 +01:00
list Locking updates for v7.1: 2026-04-14 12:36:25 -07:00
mm mm: rename zap_page_range_single() to zap_vma_range() 2026-04-05 13:53:15 -07:00
net rust: make build_assert module the home of related macros 2026-06-10 09:07:13 +02:00
num rust: make build_assert module the home of related macros 2026-06-10 09:07:13 +02:00
pci rust: io: move Io methods to extension trait 2026-07-11 18:07:41 +02:00
ptr rust: ptr: remove implicit index projection syntax 2026-06-05 10:16:47 +02:00
str rust: str: add radix prefixed integer parsing functions 2025-11-03 14:40:45 +01:00
sync Locking updates for v7.2: 2026-06-15 14:21:14 +05:30
time hrtimer: add usage examples to documentation 2026-03-23 08:31:00 +01:00
types rust: types: add ForLt trait for higher-ranked lifetime support 2026-05-27 16:24:59 +02:00
.gitignore rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
acpi.rs rust: acpi: replace core::mem::zeroed with pin_init::zeroed 2025-10-27 20:27:05 +01:00
alloc.rs rust: alloc: cleanup imports and use "kernel vertical" style 2026-05-20 17:34:17 +02:00
auxiliary.rs rust: auxiliary: generalize Registration over ForLt 2026-05-27 16:27:28 +02:00
bitfield.rs rust: bitfield: mark Debug impl as #[inline] 2026-06-17 01:32:56 +02:00
bitmap.rs rust: tests: add Kconfig for KUnit test 2026-06-08 02:30:33 +02:00
bits.rs rust: bits: always inline functions using build_assert with arguments 2026-01-18 20:40:11 +01:00
block.rs rust: block: add block related constants 2025-09-02 05:23:56 -06:00
bug.rs rust: bug: Support DEBUG_BUGVERBOSE_DETAILED option 2026-01-30 05:18:17 +01:00
build_assert.rs rust: make build_assert module the home of related macros 2026-06-10 09:07:13 +02:00
clk.rs rust: clk: implement Send and Sync 2026-04-03 11:57:35 +02:00
configfs.rs rust: configfs: replace kernel::c_str! with C-Strings 2026-01-15 09:26:49 +01:00
cpu.rs rust: kernel: cpu: mark CpuId::current() inline 2025-09-14 23:58:45 +02:00
cpufreq.rs Driver core changes for 7.2-rc1 2026-06-15 12:41:17 +05:30
cpumask.rs rust: cpumask: rename methods of Cpumask for clarity and consistency 2026-01-27 11:21:23 +05:30
cred.rs Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
debugfs.rs rust: debugfs: Use kernel Atomic type in docs example 2026-01-19 15:02:46 +01:00
device_id.rs rust: device_id: replace incorrect word in safety documentation 2025-12-29 14:09:18 +01:00
device.rs rust: device: make Core and CoreInternal lifetime-parameterized 2026-05-27 16:22:42 +02:00
devres.rs rust: io: move Io methods to extension trait 2026-07-11 18:07:41 +02:00
dma.rs rust: io: add copying methods 2026-07-11 18:09:04 +02:00
driver.rs Merge patch series "rust: device: Higher-Ranked Lifetime Types for device drivers" 2026-05-29 00:38:54 +02:00
error.rs rust: error: replace match + panic in const context with const expect 2026-05-28 11:08:27 +02:00
faux.rs rust: faux: use "kernel vertical" style for imports 2026-01-07 19:56:00 +01:00
firmware.rs rust: firmware: replace kernel::c_str! with C-Strings 2025-11-17 00:53:47 +01:00
fmt.rs rust: fmt: use vertical import style 2026-05-20 00:47:24 +02:00
fs.rs rust: fs: add Kiocb struct 2025-09-06 13:27:20 +02:00
generated_arch_reachable_asm.rs.S rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
generated_arch_static_branch_asm.rs.S
generated_arch_warn_asm.rs.S rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
gpu.rs rust: gpu: Add GPU buddy allocator bindings 2026-03-23 21:41:47 +01:00
i2c.rs Driver core changes for 7.2-rc1 2026-06-15 12:41:17 +05:30
id_pool.rs rust: id_pool: do not immediately acquire new ids 2025-12-02 14:17:09 -05:00
impl_flags.rs rust: add impl_flags! macro for defining common bitflag operations 2026-02-02 08:09:11 +01:00
init.rs rust: inline some init methods 2026-06-09 04:13:21 +02:00
interop.rs rust: interop: Add list module for C linked list interface 2026-03-23 20:29:28 +01:00
io.rs rust: io: add copying methods 2026-07-11 18:09:04 +02:00
ioctl.rs rust: make build_assert module the home of related macros 2026-06-10 09:07:13 +02:00
iov.rs rust: iov: add iov_iter abstractions for ITER_DEST 2025-09-06 13:27:20 +02:00
irq.rs rust: irq: add support for threaded IRQs and handlers 2025-08-12 20:22:09 +02:00
jump_label.rs
Kconfig.test rust: bitfield: Add KUnit tests for bitfield 2026-06-09 04:13:07 +02:00
kunit.rs rust: tests: add Kconfig for KUnit test 2026-06-08 02:30:33 +02:00
lib.rs rust: io: add dynamically-sized Region type 2026-07-11 17:42:56 +02:00
list.rs rust: list: hide macros from top-level kernel doc 2026-03-27 12:15:47 +01:00
maple_tree.rs rust: maple_tree: rcu_read_lock() in destructor to silence lockdep 2025-12-23 11:23:15 -08:00
miscdevice.rs rust: miscdevice: remove redundant imports 2026-05-23 13:47:32 +02:00
mm.rs rust: mm: update ARef and AlwaysRefCounted imports from sync::aref 2025-09-13 16:55:15 -07:00
module_param.rs rust: module_param: add missing newline to pr_warn_once 2026-06-04 16:42:34 +00:00
net.rs
num.rs rust: num: add Bounded integer wrapping type 2025-11-19 00:22:24 +01:00
of.rs rust: of: use core::ffi::CStr method names 2025-09-16 09:26:59 +02:00
opp.rs opp: rust: mark OPP methods as inline 2026-05-25 09:40:52 +05:30
page.rs mm.git review status for mm-hotfixes-stable..mm-stable 2026-06-19 10:14:34 -07:00
pci.rs rust: io: add dynamically-sized Region type 2026-07-11 17:42:56 +02:00
pid_namespace.rs rust: pid_namespace: update AlwaysRefCounted imports from sync::aref 2025-08-19 13:08:41 +02:00
platform.rs driver core: platform: set mod_name in driver registration 2026-06-08 23:28:24 +02:00
prelude.rs rust: prelude: add zerocopy{,_derive}::IntoBytes 2026-06-17 00:32:42 +02:00
print.rs rust: print: Add pr_*_once macros 2026-01-30 05:47:05 +01:00
processor.rs rust: Add cpu_relax() helper 2025-08-21 16:58:07 +02:00
ptr.rs rust: io: add dynamically-sized Region type 2026-07-11 17:42:56 +02:00
pwm.rs rust: pwm: Simplify to_result call sites and unsafe blocks 2026-01-20 18:49:58 +01:00
rbtree.rs Rust changes for v6.20 / v7.0 2026-02-10 11:53:01 -08:00
regulator.rs rust: regulator: do not assume that regulator_get() returns non-null 2026-03-24 13:08:21 +00:00
revocable.rs Rust changes for v6.17 2025-08-03 13:49:10 -07:00
safety.rs rust: safety: introduce unsafe_precondition_assert! macro 2026-02-02 08:10:48 +01:00
scatterlist.rs rust: scatterlist: Update ARef imports to use sync::aref 2025-12-18 17:25:45 +01:00
security.rs rust_binder: add Rust Binder driver 2025-09-19 09:40:46 +02:00
seq_file.rs rust: seq_file: replace kernel::c_str! with C-Strings 2026-01-29 15:32:40 +01:00
sizes.rs rust: sizes: add SizeConstants trait for device address space constants 2026-04-07 12:57:50 +02:00
soc.rs rust: Add soc_device support 2025-12-28 12:43:56 +01:00
std_vendor.rs
str.rs rust: str: clean unused import for Rust >= 1.98 2026-06-10 09:07:13 +02:00
sync.rs rust: sync: Replace kernel::c_str! with C-Strings 2026-01-28 09:25:44 +01:00
task.rs Char/Misc/IIO/and others driver updates for 7.1-rc1 2026-04-24 13:23:50 -07:00
time.rs rust: time: make ClockSource unsafe trait 2026-03-23 08:29:48 +01:00
tracepoint.rs
transmute.rs rust: transmute: simplify code with Rust 1.80.0 split_at_*checked() 2026-04-07 10:00:24 +02:00
types.rs rust: types: add ForLt trait for higher-ranked lifetime support 2026-05-27 16:24:59 +02:00
uaccess.rs Char/Misc/IIO/and others driver updates for 7.1-rc1 2026-04-24 13:23:50 -07:00
usb.rs rust: usb: make Driver trait lifetime-parameterized 2026-05-27 16:23:51 +02:00
workqueue.rs rust: workqueue: use new sync::aref path for imports 2026-03-26 15:45:34 +00:00
xarray.rs rust: make build_assert module the home of related macros 2026-06-10 09:07:13 +02:00