linux/drivers
Lukas Wunner fbaa38214c cxl/pci: Fix CDAT retrieval on big endian
The CDAT exposed in sysfs differs between little endian and big endian
arches:  On big endian, every 4 bytes are byte-swapped.

PCI Configuration Space is little endian (PCI r3.0 sec 6.1).  Accessors
such as pci_read_config_dword() implicitly swap bytes on big endian.
That way, the macros in include/uapi/linux/pci_regs.h work regardless of
the arch's endianness.  For an example of implicit byte-swapping, see
ppc4xx_pciex_read_config(), which calls in_le32(), which uses lwbrx
(Load Word Byte-Reverse Indexed).

DOE Read/Write Data Mailbox Registers are unlike other registers in
Configuration Space in that they contain or receive a 4 byte portion of
an opaque byte stream (a "Data Object" per PCIe r6.0 sec 7.9.24.5f).
They need to be copied to or from the request/response buffer verbatim.
So amend pci_doe_send_req() and pci_doe_recv_resp() to undo the implicit
byte-swapping.

The CXL_DOE_TABLE_ACCESS_* and PCI_DOE_DATA_OBJECT_DISC_* macros assume
implicit byte-swapping.  Byte-swap requests after constructing them with
those macros and byte-swap responses before parsing them.

Change the request and response type to __le32 to avoid sparse warnings.
Per a request from Jonathan, replace sizeof(u32) with sizeof(__le32) for
consistency.

Fixes: c97006046c ("cxl/port: Read CDAT table")
Tested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: stable@vger.kernel.org # v6.0+
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/3051114102f41d19df3debbee123129118fc5e6d.1678543498.git.lukas@wunner.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2023-03-21 12:27:08 -07:00
..
accel accel: Build sub-directories based on config options 2023-03-13 12:44:53 +01:00
accessibility
acpi Merge branches 'acpi-video', 'acpi-x86', 'acpi-tools' and 'acpi-docs' 2023-03-17 16:44:41 +01:00
amba
android Char/Misc and other driver subsystem changes for 6.3-rc1 2023-02-24 12:47:33 -08:00
ata ata: pata_parport: fix memory leaks 2023-03-16 16:54:38 +09:00
atm
auxdisplay
base A set of updates for the interrupt susbsystem: 2023-03-05 11:19:16 -08:00
bcma
block block: sunvdc: add check for mdesc_grab() returning NULL 2023-03-15 08:48:58 -06:00
bluetooth Bluetooth: btintel: Set Per Platform Antenna Gain(PPAG) 2023-02-09 14:20:04 -08:00
bus ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
cdrom
char tpm: disable hwrng for fTPM on some AMD designs 2023-03-12 23:28:10 +02:00
clk clk: k210: remove an implicit 64-bit division 2023-03-06 14:41:20 -08:00
clocksource Updates for timekeeping, timers and clockevent/source drivers: 2023-02-21 09:45:13 -08:00
comedi
connector
counter
cpufreq More power management updates for 6.3-rc1 2023-03-03 10:30:58 -08:00
cpuidle cpuidle: psci: Iterate backwards over list in psci_pd_remove() 2023-03-07 14:04:13 +01:00
crypto This push fixes a regression in the caam driver. 2023-03-05 11:32:30 -08:00
cxl cxl/pci: Fix CDAT retrieval on big endian 2023-03-21 12:27:08 -07:00
dax cxl for v6.3 2023-02-25 09:19:23 -08:00
dca
devfreq
dio
dma dmaengine updates for v6.3 2023-02-24 17:18:54 -08:00
dma-buf dma-buf: make kobj_type structure constant 2023-02-17 09:16:34 +01:00
edac - Add a driver for the RAS functionality on Xilinx's on chip memory 2023-02-21 08:10:03 -08:00
eisa
extcon
firewire Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
firmware firmware: xilinx: don't make a sleepable memory allocation from an atomic context 2023-03-09 18:00:31 +01:00
fpga Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
fsi
gnss
gpio ACPI: x86: Introduce an acpi_quirk_skip_gpio_event_handlers() helper 2023-03-07 14:15:10 +01:00
gpu drm/ttm: drop extra ttm_bo_put in ttm_bo_cleanup_refs 2023-03-17 16:06:58 +10:00
greybus
hid for-linus-2023030901 2023-03-09 10:17:23 -08:00
hsi Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
hte
hv Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
hwmon hwmon: (ltc2992) Set can_sleep flag for GPIO chip 2023-03-15 19:15:00 -07:00
hwspinlock
hwtracing Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
i2c i2c: dev: Fix bus callback return values 2023-03-09 22:07:52 +01:00
i3c I3C for 6.3 2023-02-28 16:05:01 -08:00
idle Power management updates for 6.3-rc1 2023-02-21 12:13:58 -08:00
iio Char/Misc and other driver subsystem changes for 6.3-rc1 2023-02-24 12:47:33 -08:00
infiniband v6.3 RDMA pull request 2023-02-24 15:11:03 -08:00
input ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
interconnect interconnect: exynos: drop redundant link destroy 2023-03-13 21:13:48 +02:00
iommu ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
ipack Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
irqchip ARM: 2023-02-25 11:30:21 -08:00
isdn
leds - Remove Drivers 2023-02-23 15:09:31 -08:00
macintosh powerpc updates for 6.3 2023-02-25 11:00:06 -08:00
mailbox mailbox: qcom-apcs-ipc: add IPQ5332 APSS clock support 2023-02-23 14:47:13 -06:00
mcb
md Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-6.3 2023-03-15 12:18:07 -06:00
media media: m5mols: fix off-by-one loop termination error 2023-03-18 11:07:15 -07:00
memory memory: tegra30-emc: fix interconnect registration race 2023-03-13 21:13:49 +02:00
memstick MMC core: 2023-02-27 09:47:26 -08:00
message
mfd Including fixes from wireless and netfilter. 2023-02-27 14:05:08 -08:00
misc misc: ad525x_dpot-i2c: Convert to i2c's .probe_new() 2023-03-09 21:58:45 +01:00
mmc mmc: dw_mmc-starfive: Fix initialization of prev_err 2023-03-09 15:33:51 +01:00
most
mtd * regression fix for the notifier handling of the I2C core 2023-03-11 09:24:05 -08:00
mux
net bonding: restore bond's IFF_SLAVE flag if a non-eth dev enslave fails 2023-03-17 07:56:41 +00:00
nfc nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition 2023-03-15 00:28:23 -07:00
ntb
nubus
nvdimm virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
nvme nvme fixes for Linux 6.3 2023-03-16 07:01:48 -06:00
nvmem nvmem: core: return -ENOENT if nvmem cell is not found 2023-03-10 10:55:49 +01:00
of IOMMU Updates for Linux v6.3: 2023-02-24 13:40:13 -08:00
opp OPP: fix error checking in opp_migrate_dentry() 2023-02-16 13:48:53 +01:00
parisc
parport Char/Misc and other driver subsystem changes for 6.3-rc1 2023-02-24 12:47:33 -08:00
pci cxl/pci: Fix CDAT retrieval on big endian 2023-03-21 12:27:08 -07:00
pcmcia Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
peci
perf RISC-V Patches for the 6.3 Merge Window, Part 2 2023-03-03 09:32:51 -08:00
phy ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
pinctrl ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
platform platform: mellanox: mlx-platform: Initialize shift variable to 0 2023-03-07 12:08:30 +01:00
pnp
power power supply changes for the v6.3 series (part 2) 2023-03-03 16:33:28 -08:00
powercap More power management updates for 6.3-rc1 2023-03-03 10:30:58 -08:00
pps
ps3
ptp ptp: vclock: use mutex to fix "sleep on atomic" bug 2023-02-22 21:23:48 -08:00
pwm pwm: dwc: Use devm_pwmchip_add() 2023-02-20 12:26:35 +01:00
rapidio
ras
regulator regulator: Fixes for v6.3 2023-03-02 09:21:25 -08:00
remoteproc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
reset
rpmsg rpmsg updates for v6.3 2023-02-26 12:10:28 -08:00
rtc RTC for 6.3 2023-03-03 09:15:50 -08:00
s390 SCSI misc on 20230303 2023-03-03 14:41:50 -08:00
sbus mm: replace vma->vm_flags direct modifications with modifier calls 2023-02-09 16:51:39 -08:00
scsi SCSI fixes on 20230316 2023-03-17 09:30:57 -07:00
sh sh updates for v6.3 2023-03-01 09:44:22 -08:00
siox
slimbus
soc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
soundwire soundwire updates for 6.3 2023-02-24 17:29:52 -08:00
spi spi: Fixes for v6.3 2023-03-02 09:25:38 -08:00
spmi
ssb
staging staging: r8188eu: delete driver 2023-03-09 10:06:28 +01:00
target scsi: target: iscsi: Fix an error message in iscsi_check_key() 2023-03-06 16:50:42 -05:00
tc
tee Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
thermal thermal: intel: int340x: processor_thermal: Fix deadlock 2023-03-03 20:34:49 +01:00
thunderbolt Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
tty TTY/Serial driver fixes for 6.3-rc3 2023-03-19 10:09:58 -07:00
ufs scsi: ufs: mcq: Use active_reqs to check busy in clock scaling 2023-03-09 21:09:28 -05:00
uio - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
usb phy-for-6.3 2023-02-24 17:22:11 -08:00
vdpa vdpa_sim: set last_used_idx as last_avail_idx in vdpasim_queue_ready 2023-03-13 02:29:12 -04:00
vfio VFIO updates for v6.3-rc1 2023-02-25 11:52:57 -08:00
vhost vhost-vdpa: free iommu domain after last use during cleanup 2023-03-13 02:29:11 -04:00
video fbdev updates for kernel 6.3-rc3: 2023-03-18 16:01:34 -07:00
virt virt/coco/sev-guest: Add throttling awareness 2023-03-13 13:29:27 +01:00
virtio virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
vlynq
w1 w1: ds2482: Convert to i2c's .probe_new() 2023-03-09 21:58:57 +01:00
watchdog linux-watchdog 6.3-rc1 tag 2023-03-02 11:12:01 -08:00
xen xen: branch for v6.3-rc3 2023-03-17 10:45:49 -07:00
zorro
Kconfig
Makefile Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00