Madalin Bucur
fbc835b0b4
dt-bindings: net: FMan erratum A050385 ...
[ Upstream commit 26d5bb9e4c4b541c475751e015072eb2cbf70d15 ]
FMAN DMA read or writes under heavy traffic load may cause FMAN
internal resource leak; thus stopping further packet processing.
The FMAN internal queue can overflow when FMAN splits single
read or write transactions into multiple smaller transactions
such that more than 17 AXI transactions are in flight from FMAN
to interconnect. When the FMAN internal queue overflows, it can
stall further packet processing. The issue can occur with any one
of the following three conditions:
1. FMAN AXI transaction crosses 4K address boundary (Errata
A010022)
2. FMAN DMA address for an AXI transaction is not 16 byte
aligned, i.e. the last 4 bits of an address are non-zero
3. Scatter Gather (SG) frames have more than one SG buffer in
the SG list and any one of the buffers, except the last
buffer in the SG list has data size that is not a multiple
of 16 bytes, i.e., other than 16, 32, 48, 64, etc.
With any one of the above three conditions present, there is
likelihood of stalled FMAN packet processing, especially under
stress with multiple ports injecting line-rate traffic.
To avoid situations that stall FMAN packet processing, all of the
above three conditions must be avoided; therefore, configure the
system with the following rules:
1. Frame buffers must not span a 4KB address boundary, unless
the frame start address is 256 byte aligned
2. All FMAN DMA start addresses (for example, BMAN buffer
address, FD[address] + FD[offset]) are 16B aligned
3. SG table and buffer addresses are 16B aligned and the size
of SG buffers are multiple of 16 bytes, except for the last
SG buffer that can be of any size.
Additional workaround notes:
- Address alignment of 64 bytes is recommended for maximally
efficient system bus transactions (although 16 byte alignment is
sufficient to avoid the stall condition)
- To support frame sizes that are larger than 4K bytes, there are
two options:
1. Large single buffer frames that span a 4KB page boundary can
be converted into SG frames to avoid transaction splits at
the 4KB boundary,
2. Align the large single buffer to 256B address boundaries,
ensure that the frame address plus offset is 256B aligned.
- If software generated SG frames have buffers that are unaligned
and with random non-multiple of 16 byte lengths, before
transmitting such frames via FMAN, frames will need to be copied
into a new single buffer or multiple buffer SG frame that is
compliant with the three rules listed above.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-02 15:28:14 +02:00
PM / devfreq: Add new name attribute for sysfs
2020-02-05 14:43:34 +00:00
ocxl: Document new OCXL IOCTLs
2018-06-03 20:40:33 +10:00
ACPI: property: graph: Update graph documentation to use generic references
2018-07-23 12:44:52 +02:00
ACPI: watchdog: Allow disabling WDAT at boot
2020-03-20 11:55:52 +01:00
ARM: 8833/1: Ensure that NEON code always compiles with Clang
2019-04-05 22:33:08 +02:00
arm64: docs: Document SSBS HWCAP
2019-10-11 18:21:31 +02:00
Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/
2018-04-12 16:08:02 +02:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
zram: introduce zram memory tracking
2018-06-07 17:34:34 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2018-08-07 11:02:05 -07:00
Documentation/cdrom: fix German sharp s in LaTex
2018-03-08 19:35:29 -07:00
page cache: use xa_lock
2018-04-11 10:28:39 -07:00
Documentation: corrections to console/console.txt
2018-08-10 16:09:40 -06:00
idr: Change documentation license
2018-10-15 16:31:29 -04:00
cpufreq: Drop cpufreq_table_validate_and_show()
2018-04-10 08:40:45 +02:00
cpuidle: Add definition of residency to sysfs documentation
2018-04-09 13:44:37 +02:00
crypto: remove redundant type flags from tfm allocation
2018-07-09 00:30:29 +08:00
doc: dev-tools: kselftest.rst: update contributing new tests
2018-06-29 09:01:50 -06:00
dm raid: bump target version, update comments and documentation
2018-09-06 17:07:58 -04:00
dt-bindings: net: FMan erratum A050385
2020-04-02 15:28:14 +02:00
Documentation/sphinx: allow "functions" with no parameters
2018-06-30 07:52:42 -06:00
driver core: Remove device link creation limitation
2020-03-20 11:55:58 +01:00
dmaengine: add a new helper dmaenginem_async_device_register
2018-07-30 10:50:22 +05:30
initramfs: move gen_initramfs_list.sh from scripts/ to usr/
2018-08-22 23:21:44 +09:00
Documentation: nvme: Documentation for nvme fault injection
2018-03-26 08:53:43 -06:00
uvesafb: Fix URLs in the documentation
2018-09-26 18:11:23 +02:00
ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()
2018-07-11 11:02:08 +01:00
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:14:21 +01:00
docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview
2018-07-15 13:55:44 +02:00
Documentation: gpio: Move drivers-on-gpio.txt to driver-api
2018-03-23 04:22:29 +01:00
drm/msm/gpu: Add the buffer objects from the submit to the crash dump
2018-07-30 08:50:10 -04:00
HID: doc: fix wrong data structure reference for UHID_OUTPUT
2019-12-05 09:20:36 +01:00
hwmon: (ina2xx) fix sysfs shunt resistor read access
2018-08-26 17:45:25 -07:00
i2c: i801: Add support for Intel Comet Lake
2019-05-04 09:20:15 +02:00
ia64: doc: tweak whitespace for 'console=' parameter
2018-03-05 14:41:38 -08:00
iio: adc: New driver for Cirrus Logic EP93xx ADC
2017-07-25 19:56:23 +01:00
Documentation/ABI: update infiniband sysfs interfaces
2018-02-23 08:18:33 -07:00
input: add MT_TOOL_DIAL
2018-07-17 15:33:47 +02:00
Char/Misc driver patches for 4.19-rc1
2018-08-18 11:04:51 -07:00
Documentation/isdn: check and fix dead links ...
2018-03-26 12:31:13 -04:00
kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt
2018-08-22 23:21:42 +09:00
doc:it_IT: translation for kernel-hacking
2018-07-26 16:21:09 -06:00
platform/x86: thinkpad_acpi: silence HKEY 0x6032, 0x60f0, 0x6030
2018-05-07 15:10:31 +03:00
Documentation: leds: Update 00-INDEX file
2017-10-23 20:17:03 +02:00
livepatch: Remove not longer valid limitations from the documentation
2018-05-24 15:37:57 +02:00
locking: Implement an algorithm choice for Wound-Wait mutexes
2018-07-03 09:44:36 +02:00
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
raid5-ppl: PPL support for disks with write-back cache enabled
2018-01-15 14:29:42 -08:00
media: replace ADOBERGB by OPRGB
2018-11-13 11:08:54 -08:00
Documentation: mips: Update AU1xxx_IDE Kconfig dependencies
2018-02-01 12:45:35 -07:00
pci_endpoint_test: Add 2 ioctl commands
2018-07-19 11:46:57 +01:00
mtd: spi-nor: add an API to restore the status of SPI flash chip
2017-12-13 00:36:00 +01:00
netfilter: nf_flowtable: fix documentation
2020-03-05 16:42:23 +01:00
NVMEM documentation fix: A minor typo
2017-08-24 13:31:58 -06:00
Documentation: openrisc: Updates to README
2017-10-30 21:37:53 +09:00
Merge branch 'remotes/lorenzo/pci/dwc'
2018-08-15 14:59:11 -05:00
pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function
2018-08-18 12:30:42 -07:00
drivers/bus: Move Arm CCN PMU driver
2018-03-06 17:26:15 +01:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
powerpc: Document issues with TM on POWER9
2018-07-02 23:54:29 +10:00
drivers/pps: aesthetic tweaks to PPS-related content
2017-09-08 18:26:51 -07:00
stable-kernel-rules.rst: add link to networking patch queue
2019-03-23 20:10:10 +01:00
ptp: Fix documentation to match code.
2018-03-26 12:13:21 -04:00
Documentation: rapidio: move sysfs interface to ABI
2018-02-23 08:25:45 -07:00
rculist: Improve documentation for list_for_each_entry_from_rcu()
2018-07-12 15:39:25 -07:00
perf: riscv: Add Document for Future Porting Guide
2018-06-04 14:02:11 -07:00
vfio-ccw: update documentation
2018-03-01 17:32:14 +01:00
sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
2019-11-12 19:20:50 +01:00
scsi: documentation: add scsi_mod.use_blk_mq to scsi-parameters
2018-08-27 12:26:10 -04:00
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
ASoC: Updates for v4.19
2018-08-13 12:12:31 +02:00
sparc64: Add support for ADI (Application Data Integrity)
2018-03-18 07:38:48 -07:00
doc: Cope with Sphinx logging deprecations
2019-06-09 09:17:21 +02:00
docs RTD theme: code-block with line nos - lines and line numbers don't line up.
2017-07-17 13:48:45 -06:00
bpf: add bpf_jit_limit knob to restrict unpriv allocations
2019-05-31 06:46:03 -07:00
thermal: Add cooling device's statistics in sysfs
2018-04-02 21:49:01 +08:00
timekeeping.txt: Correct maxCount of n-bit binary counter
2018-07-23 09:33:06 -06:00
This was a moderately busy cycle for docs, with the usual collection of
2018-08-14 14:29:31 -07:00
This was a moderately busy cycle for docs, with the usual collection of
2018-08-14 14:29:31 -07:00
USB: rio500: Remove Rio 500 kernel driver
2019-10-17 13:44:47 -07:00
Documentation: Add section about CPU vulnerabilities for Spectre
2019-07-14 08:11:17 +02:00
kvm: Convert kvm_lock to a mutex
2019-11-12 19:21:40 +01:00
docs/vm: move ksm and transhuge from "user" to "internals" section.
2018-05-29 06:45:55 -06:00
w1: fix w1_ds2438 documentation
2018-07-07 17:27:13 +02:00
watchdog: remove bfin_wdt driver
2018-03-26 15:57:04 +02:00
x86/speculation/taa: Add documentation for TSX Async Abort
2019-11-12 19:21:34 +01:00
xtensa: add support for KASAN
2017-12-16 22:37:12 -08:00
docs: admin-guide: add cgroup-v2 documentation
2018-05-10 15:42:41 -06:00
locking/atomic/bitops: Document and clarify ordering semantics for failed test_and_{}_bit()
2018-02-13 14:55:53 +01:00
x86/atomic: Fix smp_mb__{before,after}_atomic()
2019-07-26 09:14:08 +02:00
kernel debug: support resetting WARN*_ONCE
2017-11-17 16:10:00 -08:00
docs: Fix conf.py for Sphinx 2.0
2019-06-09 09:17:20 +02:00
Documentation: remove stale firmware API reference
2018-05-14 16:44:41 +02:00
dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
2017-09-01 11:59:17 +02:00
Remove gperf usage from toolchain
2017-08-19 11:02:53 -07:00
x86/speculation/mds: Add mds_clear_cpu_buffers()
2019-05-14 19:17:54 +02:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
ipmi: Make IPMI panic strings always available
2017-09-27 16:03:45 -05:00
irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG
2018-01-24 12:32:58 +01:00
IRQ.txt: add a markup for its title
2017-07-14 13:51:42 -06:00
irqflags-tracing.txt: standardize document format
2017-07-14 13:51:42 -06:00
isa.txt: standardize document format
2017-07-14 13:51:43 -06:00
isapnp.txt: promote title level
2017-07-14 13:51:43 -06:00
kernel-per-CPU-kthreads.txt: standardize document format
2017-07-14 13:51:43 -06:00
kobject.txt: standardize document format
2017-07-14 13:51:44 -06:00
kprobes/Documentation: Fix various typos
2018-06-22 11:10:55 +02:00
kref.txt: standardize document format
2017-07-14 13:51:45 -06:00
ldm.txt: standardize document format
2017-07-14 13:51:45 -06:00
lockup-watchdogs.txt: standardize document format
2017-07-14 13:51:46 -06:00
lzo.txt: standardize document format
2017-07-14 13:51:46 -06:00
mailbox.txt: standardize document format
2017-07-14 13:51:47 -06:00
Documentation: add script and build target to check for broken file references
2017-10-12 11:07:42 -06:00
sched/Documentation: Update wake_up() & co. memory-barrier guarantees
2018-07-17 09:30:34 +02:00
memory-hotplug.txt: standardize document format
2017-07-14 13:57:53 -06:00
men-chameleon-bus.txt: standardize document format
2017-07-14 13:57:54 -06:00
Documentation: nommu-map: Fix duplicate word typo
2018-06-26 09:01:27 -06:00
This series converts a number of top-level documents to the RST format
2017-07-15 12:58:58 -07:00
numastat.txt: standardize document format
2017-07-14 13:57:56 -06:00
padata.txt: standardize document format
2017-07-14 13:57:56 -06:00
parport-lowlevel.txt: standardize document format
2017-07-14 13:57:57 -06:00
percpu-rw-semaphore.txt: standardize document format
2017-07-14 13:57:58 -06:00
phy.txt: standardize document format
2017-07-14 13:57:58 -06:00
Documentation: fix locking rt-mutex doc refs
2017-10-19 12:56:44 -06:00
pnp.txt: standardize document format
2017-07-14 13:57:59 -06:00
preempt-locking.txt: standardize document format
2017-07-14 13:58:00 -06:00
rbtree: cache leftmost node internally
2017-09-08 18:26:48 -07:00
remoteproc.txt: standardize document format
2017-07-14 13:58:02 -06:00
rfkill: Fix several typos in documentation
2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt: standardize document format
2017-07-14 13:58:03 -06:00
futex: Update comments and docs about return values of arch futex code
2019-07-03 13:14:49 +02:00
rpmsg.txt: standardize document format
2017-07-14 13:58:04 -06:00
Documentation: rtc: move iotcl interface documentation to ABI
2018-01-12 00:20:41 +01:00
SAK.txt: standardize document format
2017-07-14 13:58:04 -06:00
sgi-ioc4.txt: standardize document format
2017-07-14 13:58:05 -06:00
siphash.txt: standardize document format
2017-07-14 13:58:06 -06:00
SM501.txt: standardize document format
2017-07-14 13:58:06 -06:00
smsc_ece1099.txt: standardize document format
2017-07-14 13:58:07 -06:00
Documentation: Document array_index_nospec
2018-01-30 21:54:28 +01:00
jump_label: Provide hotplug context variants
2017-08-10 12:28:59 +02:00
documentation/svga.txt: update outdated file
2017-11-20 10:45:50 -07:00
NTB: switchtec_ntb: Update switchtec documentation with notes for NTB
2017-11-18 20:37:13 -05:00
tee.txt: standardize document format
2017-07-14 13:58:14 -06:00
this_cpu_ops.txt: standardize document format
2017-07-14 13:58:08 -06:00
unaligned-memory-access.txt: standardize document format
2017-07-14 13:58:09 -06:00
vfio/mdev: Check globally for duplicate devices
2018-06-08 10:24:27 -06:00
vfio: fix documentation
2018-05-08 09:16:41 -06:00
xillybus.txt: standardize document format
2017-07-14 13:58:11 -06:00
xz.txt: standardize document format
2017-07-14 13:58:11 -06:00
zorro.txt: standardize document format
2017-07-14 13:58:12 -06:00
fbc835b0b4
