AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-21 20:47:12 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
38c0f334b3
linux_dsm_epyc7002/drivers
History
Johannes Berg 38c0f334b3 iwlwifi: use coherent DMA memory for command header 
Recently in commit 8a964f44e0
("iwlwifi: always copy first 16 bytes of commands") we fixed
the problem that the hardware writes back to the command and
that could overwrite parts of the data that was still needed
and would thus be corrupted.

Investigating this problem more closely we found that this
write-back isn't really ordered very well with respect to
other DMA traffic. Therefore, it sometimes happened that the
write-back occurred after unmapping the command again which
is clearly an issue and could corrupt the next allocation
that goes to that spot, or (better) cause IOMMU faults.

To fix this, allocate coherent memory for the first 16 bytes
of each command, containing the write-back part, and use it
for all queues. All the dynamic DMA mappings only need to be
TO_DEVICE then. This ensures that even when the write-back
happens "too late" it can't hit memory that has been freed
or a mapping that doesn't exist any more.

Since now the actual command is no longer modified, we can
also remove CMD_WANT_HCMD and get rid of the DMA sync that
was necessary to update the scratch pointer.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-28 11:49:42 +01:00
..
accessibility
acpi Merge branch 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-12-14 10:03:23 -08:00
amba Merge tag 'tegra-for-3.8-fixes-for-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into fixes 2012-12-17 10:04:27 -08:00
ata 1) More ACPI fixes 2012-12-15 12:37:18 -08:00
atm solos-pci: ensure all TX packets are aligned to 4 bytes 2012-12-19 14:53:53 -08:00
auxdisplay
base vfs: turn is_dir argument to kern_path_create into a lookup_flags arg 2012-12-20 18:50:02 -05:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-12-20 14:00:13 -08:00
bluetooth Bluetooth device 04ca:3008 should use ath3k 2013-01-10 02:51:03 -02:00
bus ARM: OMAP: Fix drivers to depend on omap for internal devices 2012-12-16 15:23:37 -08:00
cdrom
char Some nice cleanups, and even a patch my wife did as a "live" demo for 2012-12-20 08:37:05 -08:00
clk MTD pull for 3.8 2012-12-19 12:47:41 -08:00
clocksource ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
connector
cpufreq ACPI and power management updates for 3.8-rc1 2012-12-11 12:45:35 -08:00
cpuidle ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
crypto Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
dca
devfreq Merge branch 'pm-devfreq' 2012-12-07 23:13:36 +01:00
dio
dma dmatest: check for dma mapping error 2012-12-17 17:15:13 -08:00
edac Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-12-14 14:27:45 -08:00
eisa
extcon
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
firmware drivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists 2012-12-20 17:40:19 -08:00
gpio gpio/mvebu-gpio: Make mvebu-gpio depend on OF_CONFIG 2012-12-19 22:15:14 +00:00
gpu Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-12-19 20:24:25 -08:00
hid Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-12-13 19:22:22 -08:00
hsi
hv
hwmon hwmon-vid: Add support for AMD family 11h to 15h processors 2012-12-19 22:17:02 +01:00
hwspinlock hwspinlock: remove use of __devexit 2012-11-28 11:41:36 -08:00
i2c Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux 2012-12-18 16:51:10 -08:00
ide
idle
iio This is the MFD patch set for the 3.8 merge window. 2012-12-16 18:55:20 -08:00
infiniband Second batch of InfiniBand/RDMA changes for 3.8: 2012-12-21 16:40:26 -08:00
input Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-12-19 12:56:42 -08:00
iommu IOMMU Updates for Linux v3.8 2012-12-20 10:07:25 -08:00
ipack TTY/Serial merge for 3.8-rc1 2012-12-11 14:08:47 -08:00
irqchip ARM: arm-soc: Device-tree updates, take 2 2012-12-14 14:42:53 -08:00
isdn mISDN: fix race in timer canceling on module unloading 2012-12-14 13:14:07 -05:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
lguest lguest: fix typo 2012-12-18 15:19:06 +10:30
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
md Miscellaneous device-mapper fixes, cleanups and performance improvements. 2012-12-21 17:08:06 -08:00
media Merge branches 'iommu/fixes', 'dma-debug', 'x86/amd', 'x86/vt-d', 'arm/tegra' and 'arm/omap' into next 2012-12-16 12:24:09 +01:00
memory
memstick
message drivers/message/fusion/mptscsih.c: missing break 2012-12-18 15:02:12 -08:00
mfd ARM: arm-soc fixes for 3.8 2012-12-20 07:21:54 -08:00
misc Merge git://www.linux-watchdog.org/linux-watchdog 2012-12-21 17:10:29 -08:00
mmc This is the MFD patch set for the 3.8 merge window. 2012-12-16 18:55:20 -08:00
mtd Nothing exciting, just clean-ups and nicification. Oh, and one small 2012-12-20 07:39:03 -08:00
net iwlwifi: use coherent DMA memory for command header 2013-02-28 11:49:42 +01:00
nfc NFC: microread: Fix mei physical layer 2013-02-11 18:35:36 +01:00
nubus
of of: Fix export of of_find_matching_node_and_match() 2012-12-19 10:58:53 +00:00
oprofile
parisc
parport
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-12-13 14:20:19 -08:00
pcmcia ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
pinctrl pinctrl: exynos5440/samsung: Staticize pcfgs 2012-12-18 19:00:25 -08:00
platform Corentin has moved 2012-12-17 17:15:14 -08:00
pnp Driver core updates for 3.8-rc1 2012-12-11 13:13:55 -08:00
power In part2: 2012-12-19 08:14:08 -08:00
pps
ps3
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
pwm pwm: Changes for v3.8-rc1 2012-12-19 08:19:07 -08:00
rapidio Driver core updates for 3.8-rc1 2012-12-11 13:13:55 -08:00
regulator Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
remoteproc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
rpmsg virtio: rpmsg: make it clear that virtqueue_add_buf() no longer returns > 0 2012-12-18 15:20:36 +10:30
rtc revert "rtc: recycle id when unloading a rtc driver" 2012-12-20 17:40:20 -08:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-12-13 14:20:19 -08:00
sbus
scsi Second batch of InfiniBand/RDMA changes for 3.8: 2012-12-21 16:40:26 -08:00
sfi
sh
sn
spi spi/sh-hspi: fix return value check in hspi_probe(). 2012-12-19 15:11:41 +00:00
ssb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
staging cfg80211: pass wiphy to cfg80211_ref_bss/put_bss 2013-02-11 18:44:52 +01:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2012-12-15 14:25:10 -08:00
tc
thermal Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
tty Merge branch 'omap-for-v3.8/fixes-for-merge-window' into omap-for-v3.8/fixes-for-merge-window-v2 2012-12-16 11:28:10 -08:00
uio ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
usb usb: musb: use io{read,write}*_rep accessors 2012-12-17 17:15:13 -08:00
uwb
vfio vfio-pci: Enable device before attempting reset 2012-12-07 13:43:51 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2012-12-15 14:25:10 -08:00
video backlight: locomolcd: fix checkpatch error and warning 2012-12-18 15:02:11 -08:00
virt Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
virtio Some nice cleanups, and even a patch my wife did as a "live" demo for 2012-12-20 08:37:05 -08:00
vlynq
vme
w1 ARM: OMAP: Fix drivers to depend on omap for internal devices 2012-12-16 15:23:37 -08:00
watchdog watchdog: Orion: Fix possible null-deference in orion_wdt_probe 2012-12-19 22:25:10 +01:00
xen Feature: 2012-12-16 17:39:14 -08:00
zorro
Kconfig
Makefile