Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 259 insertions, 0 deletions

diff --git a/scripts/rust_is_available.sh b/scripts/rust_is_available.sh
new file mode 100755
index 000000000..c30983562
--- /dev/null
+++ b/scripts/rust_is_available.sh
@@ -0,0 +1,259 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Tests whether a suitable Rust toolchain is available.
+
+set -e
+
+min_tool_version=$(dirname $0)/min-tool-version.sh
+
+# Convert the version string x.y.z to a canonical up-to-7-digits form.
+#
+# Note that this function uses one more digit (compared to other
+# instances in other version scripts) to give a bit more space to
+# `rustc` since it will reach 1.100.0 in late 2026.
+get_canonical_version()
+{
+	IFS=.
+	set -- $1
+	echo $((100000 * $1 + 100 * $2 + $3))
+}
+
+# Print a reference to the Quick Start guide in the documentation.
+print_docs_reference()
+{
+	echo >&2 "***"
+	echo >&2 "*** Please see Documentation/rust/quick-start.rst for details"
+	echo >&2 "*** on how to set up the Rust support."
+	echo >&2 "***"
+}
+
+# Print an explanation about the fact that the script is meant to be called from Kbuild.
+print_kbuild_explanation()
+{
+	echo >&2 "***"
+	echo >&2 "*** This script is intended to be called from Kbuild."
+	echo >&2 "*** Please use the 'rustavailable' target to call it instead."
+	echo >&2 "*** Otherwise, the results may not be meaningful."
+	exit 1
+}
+
+# If the script fails for any reason, or if there was any warning, then
+# print a reference to the documentation on exit.
+warning=0
+trap 'if [ $? -ne 0 ] || [ $warning -ne 0 ]; then print_docs_reference; fi' EXIT
+
+# Check that the expected environment variables are set.
+if [ -z "${RUSTC+x}" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Environment variable 'RUSTC' is not set."
+	print_kbuild_explanation
+fi
+
+if [ -z "${BINDGEN+x}" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Environment variable 'BINDGEN' is not set."
+	print_kbuild_explanation
+fi
+
+if [ -z "${CC+x}" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Environment variable 'CC' is not set."
+	print_kbuild_explanation
+fi
+
+# Check that the Rust compiler exists.
+if ! command -v "$RUSTC" >/dev/null; then
+	echo >&2 "***"
+	echo >&2 "*** Rust compiler '$RUSTC' could not be found."
+	echo >&2 "***"
+	exit 1
+fi
+
+# Check that the Rust bindings generator exists.
+if ! command -v "$BINDGEN" >/dev/null; then
+	echo >&2 "***"
+	echo >&2 "*** Rust bindings generator '$BINDGEN' could not be found."
+	echo >&2 "***"
+	exit 1
+fi
+
+# Check that the Rust compiler version is suitable.
+#
+# Non-stable and distributions' versions may have a version suffix, e.g. `-dev`.
+rust_compiler_output=$( \
+	LC_ALL=C "$RUSTC" --version 2>/dev/null
+) || rust_compiler_code=$?
+if [ -n "$rust_compiler_code" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$RUSTC' to check the Rust compiler version failed with"
+	echo >&2 "*** code $rust_compiler_code. See output and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$rust_compiler_output"
+	echo >&2 "***"
+	exit 1
+fi
+rust_compiler_version=$( \
+	echo "$rust_compiler_output" \
+		| sed -nE '1s:.*rustc ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
+)
+if [ -z "$rust_compiler_version" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$RUSTC' to check the Rust compiler version did not return"
+	echo >&2 "*** an expected output. See output and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$rust_compiler_output"
+	echo >&2 "***"
+	exit 1
+fi
+rust_compiler_min_version=$($min_tool_version rustc)
+rust_compiler_cversion=$(get_canonical_version $rust_compiler_version)
+rust_compiler_min_cversion=$(get_canonical_version $rust_compiler_min_version)
+if [ "$rust_compiler_cversion" -lt "$rust_compiler_min_cversion" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Rust compiler '$RUSTC' is too old."
+	echo >&2 "***   Your version:    $rust_compiler_version"
+	echo >&2 "***   Minimum version: $rust_compiler_min_version"
+	echo >&2 "***"
+	exit 1
+fi
+
+# Check that the Rust bindings generator is suitable.
+#
+# Non-stable and distributions' versions may have a version suffix, e.g. `-dev`.
+rust_bindings_generator_output=$( \
+	LC_ALL=C "$BINDGEN" --version 2>/dev/null
+) || rust_bindings_generator_code=$?
+if [ -n "$rust_bindings_generator_code" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$BINDGEN' to check the Rust bindings generator version failed with"
+	echo >&2 "*** code $rust_bindings_generator_code. See output and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$rust_bindings_generator_output"
+	echo >&2 "***"
+	exit 1
+fi
+rust_bindings_generator_version=$( \
+	echo "$rust_bindings_generator_output" \
+		| sed -nE '1s:.*bindgen ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
+)
+if [ -z "$rust_bindings_generator_version" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$BINDGEN' to check the bindings generator version did not return"
+	echo >&2 "*** an expected output. See output and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$rust_bindings_generator_output"
+	echo >&2 "***"
+	exit 1
+fi
+rust_bindings_generator_min_version=$($min_tool_version bindgen)
+rust_bindings_generator_cversion=$(get_canonical_version $rust_bindings_generator_version)
+rust_bindings_generator_min_cversion=$(get_canonical_version $rust_bindings_generator_min_version)
+if [ "$rust_bindings_generator_cversion" -lt "$rust_bindings_generator_min_cversion" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Rust bindings generator '$BINDGEN' is too old."
+	echo >&2 "***   Your version:    $rust_bindings_generator_version"
+	echo >&2 "***   Minimum version: $rust_bindings_generator_min_version"
+	echo >&2 "***"
+	exit 1
+fi
+
+# Check that the `libclang` used by the Rust bindings generator is suitable.
+#
+# In order to do that, first invoke `bindgen` to get the `libclang` version
+# found by `bindgen`. This step may already fail if, for instance, `libclang`
+# is not found, thus inform the user in such a case.
+bindgen_libclang_output=$( \
+	LC_ALL=C "$BINDGEN" $(dirname $0)/rust_is_available_bindgen_libclang.h 2>&1 >/dev/null
+) || bindgen_libclang_code=$?
+if [ -n "$bindgen_libclang_code" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$BINDGEN' to check the libclang version (used by the Rust"
+	echo >&2 "*** bindings generator) failed with code $bindgen_libclang_code. This may be caused by"
+	echo >&2 "*** a failure to locate libclang. See output and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$bindgen_libclang_output"
+	echo >&2 "***"
+	exit 1
+fi
+
+# `bindgen` returned successfully, thus use the output to check that the version
+# of the `libclang` found by the Rust bindings generator is suitable.
+#
+# Unlike other version checks, note that this one does not necessarily appear
+# in the first line of the output, thus no `sed` address is provided.
+bindgen_libclang_version=$( \
+	echo "$bindgen_libclang_output" \
+		| sed -nE 's:.*clang version ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
+)
+if [ -z "$bindgen_libclang_version" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Running '$BINDGEN' to check the libclang version (used by the Rust"
+	echo >&2 "*** bindings generator) did not return an expected output. See output"
+	echo >&2 "*** and docs below for details:"
+	echo >&2 "***"
+	echo >&2 "$bindgen_libclang_output"
+	echo >&2 "***"
+	exit 1
+fi
+bindgen_libclang_min_version=$($min_tool_version llvm)
+bindgen_libclang_cversion=$(get_canonical_version $bindgen_libclang_version)
+bindgen_libclang_min_cversion=$(get_canonical_version $bindgen_libclang_min_version)
+if [ "$bindgen_libclang_cversion" -lt "$bindgen_libclang_min_cversion" ]; then
+	echo >&2 "***"
+	echo >&2 "*** libclang (used by the Rust bindings generator '$BINDGEN') is too old."
+	echo >&2 "***   Your version:    $bindgen_libclang_version"
+	echo >&2 "***   Minimum version: $bindgen_libclang_min_version"
+	echo >&2 "***"
+	exit 1
+fi
+
+if [ "$bindgen_libclang_cversion" -ge 2200000 ] &&
+	[ "$rust_bindings_generator_cversion" -lt 7201 ]; then
+	# Distributions may have patched the issue.
+	if ! "$BINDGEN" $(dirname $0)/rust_is_available_bindgen_libclang_22.h | grep -q 'pub foo'; then
+		echo >&2 "***"
+		echo >&2 "*** Rust bindings generator '$BINDGEN' < 0.72.1 together with libclang >= 22"
+		echo >&2 "*** may not work due to a bug (https://github.com/rust-lang/rust-bindgen/pull/3278)."
+		echo >&2 "***   Your bindgen version:  $rust_bindings_generator_version"
+		echo >&2 "***   Your libclang version: $bindgen_libclang_version"
+		echo >&2 "***"
+		warning=1
+	fi
+fi
+
+# If the C compiler is Clang, then we can also check whether its version
+# matches the `libclang` version used by the Rust bindings generator.
+#
+# In the future, we might be able to perform a full version check, see
+# https://github.com/rust-lang/rust-bindgen/issues/2138.
+cc_name=$($(dirname $0)/cc-version.sh $CC | cut -f1 -d' ')
+if [ "$cc_name" = Clang ]; then
+	clang_version=$( \
+		LC_ALL=C $CC --version 2>/dev/null \
+			| sed -nE '1s:.*version ([0-9]+\.[0-9]+\.[0-9]+).*:\1:p'
+	)
+	if [ "$clang_version" != "$bindgen_libclang_version" ]; then
+		echo >&2 "***"
+		echo >&2 "*** libclang (used by the Rust bindings generator '$BINDGEN')"
+		echo >&2 "*** version does not match Clang's. This may be a problem."
+		echo >&2 "***   libclang version: $bindgen_libclang_version"
+		echo >&2 "***   Clang version:    $clang_version"
+		echo >&2 "***"
+		warning=1
+	fi
+fi
+
+# Check that the source code for the `core` standard library exists.
+#
+# `$KRUSTFLAGS` is passed in case the user added `--sysroot`.
+rustc_sysroot=$("$RUSTC" $KRUSTFLAGS --print sysroot)
+rustc_src=${RUST_LIB_SRC:-"$rustc_sysroot/lib/rustlib/src/rust/library"}
+rustc_src_core="$rustc_src/core/src/lib.rs"
+if [ ! -e "$rustc_src_core" ]; then
+	echo >&2 "***"
+	echo >&2 "*** Source code for the 'core' standard library could not be found"
+	echo >&2 "*** at '$rustc_src_core'."
+	echo >&2 "***"
+	exit 1
+fi