Justin Hammond 0ed5e61bcf drivers/usbhost: Maintain the cache over xHCI data buffers. ... The controller moves every byte itself, so on a machine whose caches are not coherent with it the driver must flush before the controller reads and invalidate before the processor does. Data buffers got no maintenance at all: nothing pushed before an OUT, nothing dropped after an IN. Cache operations act a whole line at a time, which is unsafe for a buffer that does not own its lines: invalidating drops whatever else shares the line, and a writeback lands on top of what the controller has just put there. Mass storage passes a 31 byte command block and a 13 byte status out of its instance structure. Such a buffer is copied through an aligned stand-in; anything large comes from a filesystem or from xhci_ioalloc(), which now rounds its length up as well as aligning its start, so what it returns owns its last line. Whether the controller can reach a buffer at all is asked of the platform through a new dmacapable operation, since it is a property of the system the controller was fitted into rather than of the controller. A platform that does not supply it is taken to accept every address, which is what existing users have. A refused buffer gives -EFAULT, which the FAT filesystem answers by retrying through its own DMA-safe sector buffer. The device output context is also invalidated before the assigned address is read out of it; the controller wrote that address, and reading without invalidating returns whatever the processor had cached. Compiles to nothing where there is no cache to maintain, and dmacapable is NULL on PCI, so the existing user is unaffected. Assisted-by: Claude:claude-opus-5 Signed-off-by: Justin Hammond <justin@dynam.ac>		2026-09-20 22:28:07 +08:00
..
1wire	1wire: Move onewire_valid_rom to 1wire_crc.h	2026-06-26 22:50:43 +08:00
aie	Documentation,drivers/aie: align machine learning docs with current code	2026-09-19 15:16:18 -03:00
analog	analog: add ANIOC_COMP_ENABLE and ANIOC_COMP_DISABLE commands	2026-09-19 22:41:17 +08:00
audio	drivers/audio/i2s: Fix unsigned integers in function signatures	2026-07-05 15:06:04 +08:00
binfmt	binfmt: Add a configuration flag to store the module filename	2025-11-01 22:59:47 +08:00
can	sja1000: replace enter_critical_section with spinlock	2026-01-08 09:15:04 -03:00
clk	drivers/clk: use uintptr_t for register addresses	2026-06-18 21:52:33 +08:00
contactless
coresight
crypto	drivers/crypto: add Microchip RNG90 driver	2026-06-14 18:41:09 +08:00
devfreq	driver/devfreq: add procfs for devfreq	2026-08-08 15:23:54 -03:00
dma
drivers	serial/uart_rpmsg: add _raw version of driver	2026-02-23 09:19:57 -03:00
eeprom	drivers/eeprom: add 24CW160 support	2026-08-06 12:39:36 +02:00
efuse
fs	fs/hostfs: add link, symlink, readlink and lstat support	2026-08-28 18:35:37 +08:00
himem
hwspinlock	nuttx/hwspinlock: hwspinlock should based on irq instead of spinlock_irq	2026-08-27 11:13:29 +08:00
i2c	drivers/i2c: add ioexpander-based lower-half implementation for I2C bit-bang	2026-01-01 17:08:47 +08:00
i3c
input	drivers/input: support ST7123 touchscreen controller	2026-08-06 12:42:15 +02:00
ioexpander	ioexpander/ch422g: add a driver for the WCH CH422G I/O	2026-08-24 09:39:58 +02:00
lcd	style: Fix "the the" typo across the codebase.	2026-03-23 11:07:49 +01:00
leds	!drivers/pwm: remove PWM_MULTICHAN option	2026-05-18 11:35:25 -04:00
lib	libs/libc/elf, binfmt: Describe the GOT by base and size, not by index.	2026-09-08 16:31:16 -03:00
linker	Revert "zbus: Add linker support and documentation for the zbus port"	2026-08-30 10:45:19 -03:00
math	drivers/math: use small lock to replace enter_critical_section	2026-01-08 11:17:17 +08:00
mbox
mm	net/socket: merge CONFIG_NET_TIMESTAMPING into CONFIG_NET_TIMESTAMP	2026-09-18 20:00:49 +08:00
modem	style: fix checkpatch issues after debug.h move	2026-04-07 07:50:06 -03:00
motor
mtd	drivers/mtd: add MX25UW25645G support	2026-08-19 19:16:00 +02:00
net	net: add NETDEV_RX_STAMP flag in d_features	2026-09-18 20:00:49 +08:00
note	note/ram: support multiple noterams to dump data when panic occurs	2026-01-24 19:33:17 +08:00
nx	nuttx/nx: compilation error occurs	2026-04-14 13:35:26 +08:00
pci	drivers/pci:write legacy num to config space when enable legacy irq	2026-01-30 12:50:42 +08:00
pinctrl	drivers/pinctrl: Add pad read-back and a procfs entry.	2026-08-21 20:04:59 +08:00
power	drivers/power: Describe the regulators through procfs.	2026-08-18 17:28:02 +08:00
rc
regmap
reset	drivers/reset: Add line read-back and a procfs entry.	2026-08-21 20:07:01 +08:00
rf
rpmsg	drivers/rpmsg: use NuttX atomic_t API instead of C11 atomics	2026-05-21 06:28:36 +08:00
rptun	rptun: add configuring the stack of rptun as static	2026-01-19 14:18:27 +08:00
segger
sensors	drivers/sensors: add Microchip TC74 temperature sensor driver	2026-09-18 16:04:32 +08:00
serial	drivers/serial: Modify serial/pty to allow NSH/Telnet line edit	2026-07-22 22:07:18 +08:00
spi	drivers/mtd: add MX25UW25645G support	2026-08-19 19:16:00 +02:00
syslog	driver/ramlog: Implement the rate limiting function for ramlog driver.	2026-01-27 03:17:05 +08:00
timers	timers/clkcnt: Round-up when converting nsec to cnt	2026-09-07 10:17:46 -03:00
usb	drivers/usbhost: Maintain the cache over xHCI data buffers.	2026-09-20 22:28:07 +08:00
usrsock
vhost	drivers/vhost: add vhost_get_vq_buffers() to collect scatter-gather buffers	2026-02-04 02:32:02 +08:00
video	video/videomode: Fix EDID parsing and formatting of video mode dumps	2026-08-29 11:09:11 -03:00
virtio	include/nuttx/virtio: allow common virtio helpers to be used by vhost	2026-02-04 02:32:02 +08:00
wireless	wireless/lpwan: add SX1301 LoRa concentrator driver	2026-08-06 13:01:39 -03:00
.gitignore
addrenv.h	!sched/arch/libc: Give fork() and vfork() their real, separate semantics.	2026-08-10 08:57:30 -03:00
allsyms.h
arch.h	arch/atomic: remove up_testset in spinlock	2026-09-08 08:58:54 +08:00
ascii.h
atexit.h
atomic.h	nuttx/atomic.h: use _Atomic define atomic_t.	2026-08-24 13:20:45 +08:00
bits.h
board.h	drivers/usbhost/usbhost_enumerate.c: Allow selecting USB configuration	2026-05-06 06:20:03 +08:00
cache.h	nuttx/cache.h: fix the compile warning in sim when enable OpenAMP	2025-12-31 02:36:29 +08:00
can.h
cancelpt.h	sched/cancelpt: Fix MISRA C 2012 Rule 10.4 violations	2026-02-02 21:09:40 +08:00
circbuf.h
clock.h	!sys/types.h: change time_t and clock_t to int64_t to align with other OSes	2026-05-19 16:21:28 +08:00
clock_notifier.h	fs/timerfd: implement TFD_TIMER_CANCEL_ON_SET to detect clock changes	2026-01-30 17:20:24 +08:00
compiler.h	nuttx/atomic.h: use _Atomic define atomic_t.	2026-08-24 13:20:45 +08:00
coredump.h
crc8.h	libs/crc: implement AUTOSAR-compatible CRC algorithm	2026-01-30 17:32:15 +08:00
crc16.h	libs/crc: implement AUTOSAR-compatible CRC algorithm	2026-01-30 17:32:15 +08:00
crc32.h	libc/crc32: add IEEE-compatible crc32_ieee for Linux/zlib interop	2026-07-03 10:18:28 +08:00
crc64.h	!compiler: drop CONFIG_HAVE_LONG_LONG and require long long support	2026-05-19 16:21:28 +08:00
debug.h	drivers/clk: Add debug output levels.	2026-08-16 23:23:04 +08:00
devfreq.h	drivers/devfreq: Document the frequency table contract.	2026-08-18 09:46:47 -03:00
elf.h	libs/libc/elf: Place an FDPIC object's segments independently.	2026-09-08 16:31:16 -03:00
environ.h
envpath.h
ethtool.h
event.h	[!] sched/event: Remove wait object dependency from event implementation	2025-10-31 19:56:32 -03:00
fdcheck.h
fdpic.h	binfmt, arch/arm: Add the CONFIG_FDPIC option and the ABI header.	2026-09-08 16:31:16 -03:00
fdt.h
gdbstub.h
hashtable.h
hrtimer.h	sched/hrtimer: Update the comments.	2026-02-02 13:26:22 +08:00
idr.h
init.h	sched: add trace points during system startup and board initialization	2026-01-27 03:18:11 +08:00
instrument.h
ipcc.h
irq.h	sched/irq: Consolidate IRQ bounds checking into IRQ_TO_NDX macro	2026-01-28 13:35:30 +08:00
iterable_sections.h	include/nuttx: Add link-time iterable sections infrastructure	2026-08-27 01:04:05 +08:00
kmalloc.h
kthread.h
lin.h	LIN:adjust the LIN flag	2026-01-08 23:15:31 +08:00
lirc.h
list.h	list: Fix the list conflicts.	2026-01-19 14:12:09 +08:00
list_type.h	list: Fix the list conflicts.	2026-01-19 14:12:09 +08:00
macro.h	include/nuttx/macro.h: Let FOREACH_ARG() paste the argument index	2026-09-01 17:55:52 -03:00
memoryregion.h
mmcsd.h
module.h
mqueue.h	!sys/types.h: change time_t and clock_t to int64_t to align with other OSes	2026-05-19 16:21:28 +08:00
mutex.h	sched/pthread: move pthread mutex from syscall to user-space	2026-01-22 12:40:49 -03:00
notifier.h	include/debug.h: Move to include/nuttx/debug.h	2026-04-07 07:50:06 -03:00
nuttx.h
page.h	style: Fix "is is" typo across the codebase.	2026-03-24 09:39:26 +08:00
panic_notifier.h
pgalloc.h	mm/pgalloc: support 32 KB and 64 KB page sizes	2026-09-10 23:28:43 +08:00
plist.h	driver/devfreq: DVFS framework for devices	2026-08-08 15:23:54 -03:00
progmem.h
pthread.h	pthread: move pthread_cond to userspace	2026-01-26 16:26:39 +08:00
queue.h
random.h
reboot_notifier.h
rwsem.h	sched/sem_rw.c: Add downgrade_write API for sem_rw	2026-01-07 22:47:09 +08:00
sched.h	sched: add per-group filesystem jail root	2026-09-20 22:27:38 +08:00
sched_note.h	include/nuttx/macro.h: Let FOREACH_ARG() paste the argument index	2026-09-01 17:55:52 -03:00
scsi.h
sdio.h	drivers/mmcsd: Switch SD cards into high speed.	2026-08-18 09:38:45 +08:00
sdio_slave.h
semaphore.h	sched/semaphore: Keep a negative task id out of the mutex holder.	2026-08-09 10:05:30 +08:00
seqlock.h	seqlock: Fix struct name and constants.	2025-12-22 10:22:06 -03:00
signal.h	sched/signal: Remove shadow definitions to reduce unnecessary API	2025-10-14 17:40:18 +08:00
spawn.h
spinlock.h	arch/atomic: remove up_testset in spinlock	2026-09-08 08:58:54 +08:00
spinlock_type.h	arch/atomic: remove up_testset in spinlock	2026-09-08 08:58:54 +08:00
streams.h
symtab.h
tee.h	drivers/misc/optee: Expanded RPC support.	2025-08-06 02:29:33 +08:00
thermal.h
tls.h	pthread: remove tl_lock	2026-01-26 20:56:12 +08:00
trace.h	trace: fix macro line continuation formatting	2026-01-25 10:45:26 -03:00
uorb.h	drivers/sensors: Use sensor_data_t for the electrical quantities.	2026-09-20 09:23:37 -04:00
userspace.h	protect: move us_heap to userspace_data_s	2026-02-02 11:06:53 +08:00
vt100.h	Documentation: nsh: document the top command	2026-07-11 09:15:15 -03:00
wdog.h	drivers: Fix comment typos — 'Pubic' → 'Public' across drivers and headers.	2026-07-02 13:29:48 +08:00
wqueue.h	libc/wqueue: support custom user work queues	2026-09-04 23:02:48 +08:00
zoneinfo.h