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Vladimir Oltean 640f763f98 net: dsa: sja1105: Add support for Spanning Tree Protocol 
While not explicitly documented as supported in UM10944, compliance with
the STP states can be obtained by manipulating 3 settings at the
(per-port) MAC config level: dynamic learning, inhibiting reception of
regular traffic, and inhibiting transmission of regular traffic.

In all these modes, transmission and reception of special BPDU frames
from the stack is still enabled (not inhibited by the MAC-level
settings).

On ingress, BPDUs are classified by the MAC filter as link-local
(01-80-C2-00-00-00) and forwarded to the CPU port.  This mechanism works
under all conditions (even without the custom 802.1Q tagging) because
the switch hardware inserts the source port and switch ID into bytes 4
and 5 of the MAC-filtered frames. Then the DSA .rcv handler needs to put
back zeroes into the MAC address after decoding the source port
information.

On egress, BPDUs are transmitted using management routes from the xmit
worker thread. Again this does not require switch tagging, as the switch
port is programmed through SPI to hold a temporary (single-fire) route
for a frame with the programmed destination MAC (01-80-C2-00-00-00).

STP is activated using the following commands and was tested by
connecting two front-panel ports together and noticing that switching
loops were prevented (one port remains in the blocking state):

$ ip link add name br0 type bridge stp_state 1 && ip link set br0 up
$ for eth in $(ls /sys/devices/platform/soc/2100000.spi/spi_master/spi0/spi0.1/net/);
  do ip link set ${eth} master br0 && ip link set ${eth} up; done

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 21:52:42 -07:00
..
accessibility
acpi Revert "ACPICA: Clear status of GPEs before enabling them" 2019-04-30 20:03:44 +02:00
amba ARM: 8836/1: drivers: amba: Update component matching to use the CoreSight UCI values. 2019-02-26 11:23:49 +00:00
android binder: fix race between munmap() and direct reclaim 2019-03-21 06:51:32 +01:00
ata libata: fix using DMA buffers on stack 2019-03-28 08:16:04 -06:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-04-25 23:52:29 -04:00
auxdisplay auxdisplay: charlcd: make backlight initial state configurable 2019-03-17 08:48:45 +01:00
base mm/memory_hotplug: do not unlock after failing to take the device_hotplug_lock 2019-04-19 09:46:04 -07:00
bcma
block Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 22:14:21 -04:00
bluetooth Bluetooth: hci_qca: Rename STATE_<flags> to QCA_<flags> 2019-05-05 19:34:00 +02:00
bus ARM: SoC driver updates for 5.1 2019-03-06 09:41:12 -08:00
cdrom cdrom: Fix race condition in cdrom_sysctl_register 2019-02-08 06:46:59 -07:00
char ipmi: fix sleep-in-atomic in free_user at cleanup SRCU user->release_barrier 2019-04-17 10:29:27 -05:00
clk clk: imx: Fix PLL_1416X not rounding rates 2019-04-12 14:21:43 -07:00
clocksource clocksource/drivers/timer-ti-dm: Remove omap_dm_timer_set_load_start 2019-04-16 14:26:54 +02:00
connector connector: fix unsafe usage of ->real_parent 2019-03-08 15:06:38 -08:00
cpufreq cpufreq/intel_pstate: Load only on Intel hardware 2019-04-01 23:39:23 +02:00
cpuidle cpuidle: governor: Add new governors to cpuidle_governors again 2019-03-12 23:46:55 +01:00
crypto crypto: caam - fix copy of next buffer for xcbc and cmac 2019-03-28 13:54:32 +08:00
dax device-dax for 5.1 2019-03-16 13:05:32 -07:00
dca
devfreq
dio
dma dmaengine: mediatek-cqdma: fix wrong register usage in mtk_cqdma_start 2019-04-26 17:26:38 +05:30
dma-buf
edac Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-08 09:11:39 -08:00
eisa
extcon extcon: ptn5150: fix COMPILE_TEST dependencies 2019-04-05 10:08:37 +09:00
firewire scsi: communicate max segment size to the DMA mapping code 2019-01-22 20:40:59 -05:00
firmware memblock: drop memblock_alloc_*_nopanic() variants 2019-03-12 10:04:02 -07:00
fmc
fpga Merge 5.0-rc6 into char-misc-next 2019-02-11 09:05:58 +01:00
fsi
gnss gnss: add driver for mediatek receivers 2019-02-15 16:54:38 +01:00
gpio gpio: Fix gpiochip_add_data_with_key() error path 2019-04-25 09:12:00 +02:00
gpu drm/imx: fix DP CSC handling 2019-04-26 10:33:33 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-04-19 10:28:27 -07:00
hsi HSI: omap_ssi_port: fix debugfs_simple_attr.cocci warnings 2019-02-14 12:36:21 +01:00
hv Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
hwmon hwmon: (ntc_thermistor) Fix temperature type reporting 2019-03-29 09:51:44 -07:00
hwspinlock
hwtracing ARM updates for 5.1-rc1 2019-03-15 14:37:46 -07:00
i2c gcc-9: don't warn about uninitialized variable 2019-05-01 11:07:40 -07:00
i3c i3c: dw: Fix dw_i3c_master_disable controller by using correct mask 2019-04-10 12:46:20 +02:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2019-03-11 09:34:00 -07:00
idle intel_idle: add support for Jacobsville 2019-02-15 10:49:14 +01:00
iio iio: core: fix a possible circular locking dependency 2019-03-31 11:11:31 +01:00
infiniband mlx5-updates-2019-04-30 2019-05-04 00:25:02 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-04-27 16:27:02 -07:00
interconnect
iommu iommu/amd: Set exclusion range correctly 2019-04-12 12:59:45 +02:00
ipack
irqchip A couple more MIPS fixes: 2019-04-22 11:54:47 -07:00
isdn isdn:mISDN: fix misuse of %x in hfcpci.c 2019-04-23 18:33:30 -07:00
leds leds: trigger: netdev: use memcpy in device_name_store 2019-03-30 19:09:32 +01:00
lightnvm lightnvm: pblk: fix crash in pblk_end_partial_read due to multipage bvecs 2019-04-10 12:17:01 -06:00
macintosh treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
mailbox mailbox: imx: keep MU irq working during suspend/resume 2019-03-11 02:51:43 -05:00
mcb
md dm integrity: fix deadlock with overlapping I/O 2019-04-05 18:49:08 -04:00
media bpf: add map helper functions push, pop, peek in more BPF programs 2019-04-16 10:24:02 +02:00
memory
memstick
message
mfd mfd: sun6i-prcm: Allow to compile with COMPILE_TEST 2019-04-03 08:38:07 +01:00
misc misc: fastrpc: add checked value for dma_set_mask 2019-04-02 17:56:54 +02:00
mmc mmc: sdhci-omap: Don't finish_mrq() on a command error during tuning 2019-04-11 12:40:32 +02:00
mtd mtd: rawnand: marvell: Clean the controller state before each operation 2019-04-25 23:21:51 +02:00
mux
net net: dsa: sja1105: Add support for Spanning Tree Protocol 2019-05-05 21:52:42 -07:00
nfc NFC: st95hf: remove set but not used variables 'dev, nfcddev' 2019-04-26 12:07:18 -04:00
ntb Fixes for switchtec debugability and mapping table entries, NTB 2019-03-15 14:32:59 -07:00
nubus
nvdimm libnvdimm/pmem: fix a possible OOB access when read and write pmem 2019-04-07 14:36:04 -07:00
nvme nvmet: fix discover log page when offsets are used 2019-04-11 17:28:30 +02:00
nvmem Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
of of_net: add NVMEM support to of_get_mac_address 2019-05-05 21:47:07 -07:00
opp PM / OPP: Update performance state when freq == old_freq 2019-03-12 09:45:56 +01:00
oprofile
parisc Revert: parisc: Use F_EXTEND() macro in iosapic code 2019-04-06 19:07:55 +02:00
parport Revert "parport: daisy: use new parport device model" 2019-03-25 14:49:00 -07:00
pci PCI/LINK: Add Kconfig option (default off) 2019-05-02 08:34:32 -05:00
pcmcia
perf arm64 updates for 5.1: 2019-03-10 10:17:23 -07:00
phy phy: sun4i-usb: Support set_mode to USB_HOST for non-OTG PHYs 2019-03-26 16:48:55 +09:00
pinctrl This is the bulk of pin control changes for the v5.1 kernel cycle. 2019-03-11 11:12:50 -07:00
platform Here's more than a handful of clk driver fixes for changes that came in 2019-04-13 14:33:56 -07:00
pnp ACPI/ACPICA: Trivial: fix spelling mistakes and fix whitespace formatting 2019-02-24 21:12:01 +01:00
power Power Supply Fixes for 5.1 cycle 2019-05-01 14:57:23 -07:00
powercap powercap/intel_rapl: add Ice Lake mobile 2019-02-18 11:31:39 +01:00
pps
ps3
ptp Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-05 14:08:26 -08:00
pwm pwm: atmel: Remove useless symbolic definitions 2019-03-04 12:52:49 +01:00
rapidio rapidio/mport_cdev: mark expected switch fall-through 2019-03-07 18:32:02 -08:00
ras RAS: Use consistent types for UUIDs 2019-01-25 16:40:40 +01:00
regulator regulator: mc13xxx: Constify regulator_ops variables 2019-03-04 00:01:08 +00:00
remoteproc remoteproc updates for v5.1 2019-03-14 09:00:06 -07:00
reset reset: meson-audio-arb: Fix missing .owner setting of reset_controller_dev 2019-03-25 16:22:10 +01:00
rpmsg rpmsg: virtio: change header file sort style 2019-02-20 21:15:54 -08:00
rtc rtc: da9063: set uie_unsupported when relevant 2019-04-02 23:33:09 +02:00
s390 s390/qeth: trust non-IP cast type in qeth_l3_fill_header() 2019-04-26 11:14:06 -04:00
sbus
scsi SCSI fixes on 20190420 2019-04-20 12:52:23 -07:00
sfi
sh
siox
slimbus
sn
soc This pull request brings in a build fix for arm64 with bcm2835 2019-03-18 10:31:24 -07:00
soundwire
spi pci-v5.1-changes 2019-03-09 14:57:08 -08:00
spmi spmi: pmic-arb: select IRQ_DOMAIN_HIERARCHY in Kconfig 2019-02-14 09:14:50 +01:00
ssb ssb: Fix possible NULL pointer dereference in ssb_host_pcmcia_exit 2019-04-25 19:39:34 +03:00
staging staging: octeon-ethernet: support of_get_mac_address new ERR_PTR error 2019-05-05 21:47:07 -07:00
target genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
tc
tee ARM: SoC driver updates for 5.1 2019-03-06 09:41:12 -08:00
thermal Merge branches 'fixes' and 'thermal-intel' into next 2019-03-18 22:37:44 +08:00
thunderbolt
tty sc16is7xx: put err_spi and err_i2c into correct #ifdef 2019-04-19 14:09:23 +02:00
uio driver: uio: fix possible use-after-free in __uio_register_device 2019-01-31 16:36:52 +01:00
usb USB: yurex: Fix protection fault after device removal 2019-04-25 11:11:41 +02:00
uwb
vfio vfio/type1: Limit DMA mappings per container 2019-04-03 12:43:05 -06:00
vhost vhost: reject zero size iova range 2019-04-10 22:45:38 -07:00
video fbdev changes for v5.1: 2019-03-15 14:22:59 -07:00
virt virt: vbox: Implement passing requestor info to the host for VirtualBox 6.0.x 2019-03-28 01:55:18 +09:00
virtio virtio: Honour 'may_reduce_num' in vring_create_virtqueue 2019-04-08 17:05:52 -04:00
visorbus
vlynq
vme
w1 USB: w1 ds2490: Fix bug caused by improper use of altsetting array 2019-04-25 11:11:41 +02:00
watchdog linux-watchdog 5.1-rc1 tag 2019-03-11 11:22:15 -07:00
xen xen: fixes for 5.1-rc4 2019-04-07 06:12:10 -10:00
zorro
Kconfig
Makefile IOMMU Updates for Linux v5.1 2019-03-10 12:29:52 -07:00