Madalin Bucur
c211a30c18
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>
2020-04-01 11:01:52 +02:00
PM / devfreq: Add new name attribute for sysfs
2020-02-05 21:22:40 +00:00
docs: add some documentation dirs to the driver-api book
2019-07-15 11:03:02 -03:00
ACPI: watchdog: Allow disabling WDAT at boot
2020-03-21 08:11:47 +01:00
Documentation/arm/samsung-s3c24xx: Remove stray U+FEFF character to fix title
2019-08-12 15:25:32 -06:00
mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()
2020-02-28 17:22:21 +01:00
docs: block: null_blk: enhance document style
2019-09-11 16:04:22 -06:00
bpf/flow_dissector: document flags
2019-07-25 18:00:41 -07:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
Modules fixes for v5.4-rc3
2019-10-11 10:19:24 -07:00
Documentation: cpufreq: Update policy notifier documentation
2019-09-02 22:44:05 +02:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2019-09-18 12:11:14 -07:00
mm, page_owner: decouple freeing stack trace from debug_pagealloc
2019-10-14 15:04:00 -07:00
dt-bindings: net: FMan erratum A050385
2020-04-01 11:01:52 +02:00
docs: remove extra conf.py files
2019-07-17 06:57:52 -03:00
This is the bulk of pin control changes for the v5.4 kernel
2019-09-19 14:19:33 -07:00
docs: driver-api: add a series of orphaned documents
2019-07-15 11:03:02 -03:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
fbdev: fix numbering of fbcon options
2020-02-24 08:36:42 +01:00
It's a somewhat calmer cycle for docs this time, as the churn of the mass
2019-09-17 16:22:26 -07:00
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:17:51 +01:00
Documentation: ACPI: DSD: Convert LED documentation to ReST
2019-08-20 23:53:46 +02:00
Documentation: fpga: dfl: add descriptions for virtualization and new interfaces.
2019-09-03 19:35:42 -07:00
Merge drm/drm-next into drm-intel-next-queued
2019-08-22 00:10:36 -07:00
docs: add some documentation dirs to the driver-api book
2019-07-15 11:03:02 -03:00
hwmon: docs: Extend inspur-ipsps1 title underline
2019-10-07 05:56:57 -07:00
docs: i2c: convert to ReST and add to driver-api bookset
2019-07-31 13:25:27 -06:00
docs: add SPDX tags to new index files
2019-07-15 11:03:03 -03:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
docs: add some documentation dirs to the driver-api book
2019-07-15 11:03:02 -03:00
Documentation/infiniband: update name of some functions
2019-09-13 16:55:55 -03:00
Input: docs: fix spelling mistake "potocol" -> "protocol"
2019-08-06 11:24:49 -06:00
fs-verity: add UAPI header
2019-07-28 16:59:16 -07:00
docs: isdn: convert to ReST and add to kAPI bookset
2019-07-31 13:30:25 -06:00
modpost: move the namespace field in Module.symvers last
2020-03-25 08:25:55 +01:00
docs: Add documentation for Symbol Namespaces
2019-09-10 10:30:49 +02:00
leds: core: Add support for composing LED class device names
2019-07-25 20:07:52 +02:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
doc 🔒 remove reference to clever use of read-write lock
2019-09-14 01:53:27 -06:00
docs: README.buddha: convert to ReST and add to m68k book
2019-07-31 13:30:10 -06:00
docs: Fix typo on pull requests guide
2019-08-12 15:14:14 -06:00
drm main pull for 5.4-rc1
2019-09-19 16:24:24 -07:00
docs: driver-api: add remaining converted dirs to it
2019-07-15 11:03:03 -03:00
Main MIPS changes for v5.4:
2019-09-22 09:30:30 -07:00
Docs: misc: xilinx_sdfec: Add documentation
2019-08-15 17:54:38 +02:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
netfilter: nf_flowtable: fix documentation
2020-03-05 16:43:51 +01:00
docs: nios2: add it to the main Documentation body
2019-07-31 13:31:51 -06:00
docs: openrisc: convert to ReST and add to documentation body
2019-07-31 13:30:20 -06:00
docs: parisc: convert to ReST and add to documentation body
2019-07-31 13:30:15 -06:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-08-27 14:23:31 -07:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools'
2019-09-17 09:49:19 +02:00
docs: powerpc: Add missing documentation reference
2019-09-17 23:59:34 +10:00
Documentation/process: Add fallthrough pseudo-keyword
2019-10-11 09:26:05 -07:00
Merge branches 'consolidate.2019.08.01b', 'fixes.2019.08.12a', 'lists.2019.08.13a' and 'torture.2019.08.01b' into HEAD
2019-08-13 14:30:30 -07:00
It's a somewhat calmer cycle for docs this time, as the churn of the mass
2019-09-17 16:22:26 -07:00
Documentation/s390: remove outdated debugging390 documentation
2019-08-21 12:41:43 +02:00
sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
2019-08-08 09:09:30 +02:00
scsi: smartpqi: Update attribute name to driver_version
2020-01-17 19:48:27 +01:00
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2019-09-27 19:37:27 -07:00
docs: remove extra conf.py files
2019-07-17 06:57:52 -03:00
sound updates for 5.4
2019-09-17 17:43:33 -07:00
docs: add arch doc directories to the index
2019-07-15 11:03:01 -03:00
Documentation: sphinx: Don't parse socket() as identifier reference
2019-08-12 14:55:30 -06:00
spi: docs: convert to ReST and add it to the kABI bookset
2019-07-31 14:13:13 -06:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
docs: add some directories to the main documentation index
2019-07-15 11:03:03 -03:00
Tracing updates:
2019-09-20 11:19:48 -07:00
doc: arm64: fix grammar dtb placed in no attributes region
2019-09-06 08:44:34 -06:00
USB: rio500: Remove Rio 500 kernel driver
2019-10-04 10:53:36 +02:00
docs: remove extra conf.py files
2019-07-17 06:57:52 -03:00
KVM/Hyper-V: Add new KVM capability KVM_CAP_HYPERV_DIRECT_TLBFLUSH
2019-09-24 13:37:13 +02:00
cpuidle: add haltpoll governor
2019-07-30 17:27:37 +02:00
mm: treewide: clarify pgtable_page_{ctor,dtor}() naming
2019-09-26 10:10:44 -07:00
docs: w1: convert to ReST and add to the kAPI group of docs
2019-07-31 14:16:17 -06:00
linux-watchdog 5.4-rc1 tag
2019-09-27 11:17:38 -07:00
x86/speculation/taa: Add documentation for TSX Async Abort
2019-10-28 08:37:00 +01:00
docs: add arch doc directories to the index
2019-07-15 11:03:01 -03:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-08 16:12:03 -07:00
docs: conf.py: only use CJK if the font is available
2019-07-17 06:57:51 -03:00
docs: logo.txt: rename it to COPYING-logo
2019-07-15 09:20:27 -03:00
docs: DMA-API-HOWTO.txt: fix an unmarked code block
2019-07-15 09:20:24 -03:00
dma-mapping: remove dma_release_declared_memory
2019-09-04 11:13:19 +02:00
kbuild: create *.mod with full directory path and remove MODVERDIR
2019-07-18 02:19:31 +09:00
Main MIPS changes for v5.4:
2019-09-22 09:30:30 -07:00
docs: fix broken doc references due to renames
2019-07-17 06:57:51 -03:00
padata: allocate workqueue internally
2019-09-13 21:15:39 +10:00
docs: locking: convert docs to ReST and rename to *.rst
2019-07-15 08:53:27 -03:00
docs: rbtree.txt: fix Sphinx build warnings
2019-07-15 09:20:24 -03:00
c211a30c18
