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c40bd7d973
linux/drivers
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Dave Jiang c40bd7d973 dmaengine: idxd: process user page faults for completion record 
DSA supports page fault handling through PRS. However, the DMA engine
that's processing the descriptor is blocked until the PRS response is
received. Other workqueues sharing the engine are also blocked.
Page fault handing by the driver with PRS disabled can be used to
mitigate the stalling.

With PRS disabled while ATS remain enabled, DSA handles page faults on
a completion record by reporting an event in the event log. In this
instance, the descriptor is completed and the event log contains the
completion record address and the contents of the completion record. Add
support to the event log handling code to fault in the completion record
and copy the content of the completion record to user memory.

A bitmap is introduced to keep track of discarded event log entries. When
the user process initiates ->release() of the char device, it no longer is
interested in any remaining event log entries tied to the relevant wq and
PASID. The driver will mark the event log entry index in the bitmap. Upon
encountering the entries during processing, the event log handler will just
clear the bitmap bit and skip the entry rather than attempt to process the
event log entry.

Tested-by: Tony Zhu <tony.zhu@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20230407203143.2189681-10-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-04-12 23:18:45 +05:30
..
accel - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
accessibility
acpi More ACPI updates for 6.3-rc1 2023-03-03 10:36:01 -08:00
amba
android Char/Misc and other driver subsystem changes for 6.3-rc1 2023-02-24 12:47:33 -08:00
ata ata: ahci: Revert "ata: ahci: Add Tiger Lake UP{3,4} AHCI controller" 2023-03-03 18:43:02 +09:00
atm
auxdisplay
base A set of updates for the interrupt susbsystem: 2023-03-05 11:19:16 -08:00
bcma
block block-6.3-2023-03-03 2023-03-03 10:21:39 -08:00
bluetooth
bus ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
cdrom
char Char/Misc and other driver subsystem changes for 6.3-rc1 2023-02-24 12:47:33 -08:00
clk We have one small patch to the clk core this time around. It fixes a corner 2023-02-25 15:16:23 -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 ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
crypto This push fixes a regression in the caam driver. 2023-03-05 11:32:30 -08:00
cxl cxl for v6.3 2023-02-25 09:19:23 -08:00
dax cxl for v6.3 2023-02-25 09:19:23 -08:00
dca
devfreq
dio
dma dmaengine: idxd: process user page faults for completion record 2023-04-12 23:18:45 +05:30
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 ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
fpga Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
fsi
gnss
gpio Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
gpu drm-next-fixes for 6.3-rc1 2023-03-02 15:08:54 -08:00
greybus
hid Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -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 - Core Frameworks 2023-02-23 15:03:05 -08:00
hwspinlock
hwtracing Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
i2c i2c: gxp: fix an error code in probe 2023-03-03 21:00:54 +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 SoC: DT changes for 6.3 2023-02-20 15:49:56 -08:00
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 flexible-array transformations for 6.3-rc1 2023-02-25 12:53:42 -08:00
media ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
memory ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
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 ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
mmc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
most
mtd This pull request contains updates for JFFS2, UBI and UBIFS 2023-03-01 09:06:51 -08:00
mux
net Including fixes from wireless and netfilter. 2023-02-27 14:05:08 -08:00
nfc nfc: fix memory leak of se_io context in nfc_genl_se_io 2023-02-26 14:55:13 +00:00
ntb
nubus
nvdimm virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
nvme block-6.3-2023-03-03 2023-03-03 10:21:39 -08:00
nvmem
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 A set of updates for the interrupt susbsystem: 2023-03-05 11:19:16 -08:00
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 power supply and reset changes for the v6.3 series 2023-02-24 17:04:23 -08:00
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
scsi SCSI misc on 20230303 2023-03-03 14:41:50 -08:00
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 media updates for v6.3-rc1 2023-02-26 11:47:26 -08:00
target - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
tc
tee Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
thermal More thermal control updates for 6.3-rc1 2023-03-03 10:41:59 -08:00
thunderbolt Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
tty vc_screen: don't clobber return value in vcs_read 2023-02-27 18:35:28 -08:00
ufs SCSI misc on 20230303 2023-03-03 14:41:50 -08:00
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 virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
vfio VFIO updates for v6.3-rc1 2023-02-25 11:52:57 -08:00
vhost virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
video TTY/Serial driver updates for 6.3-rc1 2023-02-24 12:17:14 -08:00
virt virt/sev-guest: Return -EIO if certificate buffer is not large enough 2023-03-01 10:17:46 +01:00
virtio virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
vlynq
w1 Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
watchdog linux-watchdog 6.3-rc1 tag 2023-03-02 11:12:01 -08:00
xen Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
zorro
Kconfig
Makefile Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00