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diff --git a/Documentation/networking/device_drivers/ti/cpsw.txt b/Documentation/networking/device_drivers/ti/cpsw.txt deleted file mode 100644 index d4d4c0751a09..000000000000 --- a/Documentation/networking/device_drivers/ti/cpsw.txt +++ /dev/null @@ -1,541 +0,0 @@ -* Texas Instruments CPSW ethernet driver - -Multiqueue & CBS & MQPRIO -===================================================================== -===================================================================== - -The cpsw has 3 CBS shapers for each external ports. This document -describes MQPRIO and CBS Qdisc offload configuration for cpsw driver -based on examples. It potentially can be used in audio video bridging -(AVB) and time sensitive networking (TSN). - -The following examples were tested on AM572x EVM and BBB boards. - -Test setup -========== - -Under consideration two examples with AM572x EVM running cpsw driver -in dual_emac mode. - -Several prerequisites: -- TX queues must be rated starting from txq0 that has highest priority -- Traffic classes are used starting from 0, that has highest priority -- CBS shapers should be used with rated queues -- The bandwidth for CBS shapers has to be set a little bit more then - potential incoming rate, thus, rate of all incoming tx queues has - to be a little less -- Real rates can differ, due to discreetness -- Map skb-priority to txq is not enough, also skb-priority to l2 prio - map has to be created with ip or vconfig tool -- Any l2/socket prio (0 - 7) for classes can be used, but for - simplicity default values are used: 3 and 2 -- only 2 classes tested: A and B, but checked and can work with more, - maximum allowed 4, but only for 3 rate can be set. - -Test setup for examples -======================= - +-------------------------------+ - |--+ | - | | Workstation0 | - |E | MAC 18:03:73:66:87:42 | -+-----------------------------+ +--|t | | -| | 1 | E | | |h |./tsn_listener -d \ | -| Target board: | 0 | t |--+ |0 | 18:03:73:66:87:42 -i eth0 \| -| AM572x EVM | 0 | h | | | -s 1500 | -| | 0 | 0 | |--+ | -| Only 2 classes: |Mb +---| +-------------------------------+ -| class A, class B | | -| | +---| +-------------------------------+ -| | 1 | E | |--+ | -| | 0 | t | | | Workstation1 | -| | 0 | h |--+ |E | MAC 20:cf:30:85:7d:fd | -| |Mb | 1 | +--|t | | -+-----------------------------+ |h |./tsn_listener -d \ | - |0 | 20:cf:30:85:7d:fd -i eth0 \| - | | -s 1500 | - |--+ | - +-------------------------------+ - -********************************************************************* -********************************************************************* -********************************************************************* -Example 1: One port tx AVB configuration scheme for target board ----------------------------------------------------------------------- -(prints and scheme for AM572x evm, applicable for single port boards) - -tc - traffic class -txq - transmit queue -p - priority -f - fifo (cpsw fifo) -S - shaper configured - -+------------------------------------------------------------------+ u -| +---------------+ +---------------+ +------+ +------+ | s -| | | | | | | | | | e -| | App 1 | | App 2 | | Apps | | Apps | | r -| | Class A | | Class B | | Rest | | Rest | | -| | Eth0 | | Eth0 | | Eth0 | | Eth1 | | s -| | VLAN100 | | VLAN100 | | | | | | | | p -| | 40 Mb/s | | 20 Mb/s | | | | | | | | a -| | SO_PRIORITY=3 | | SO_PRIORITY=2 | | | | | | | | c -| | | | | | | | | | | | | | e -| +---|-----------+ +---|-----------+ +---|--+ +---|--+ | -+-----|------------------|------------------|--------|-------------+ - +-+ +------------+ | | - | | +-----------------+ +--+ - | | | | -+---|-------|-------------|-----------------------|----------------+ -| +----+ +----+ +----+ +----+ +----+ | -| | p3 | | p2 | | p1 | | p0 | | p0 | | k -| \ / \ / \ / \ / \ / | e -| \ / \ / \ / \ / \ / | r -| \/ \/ \/ \/ \/ | n -| | | | | | e -| | | +-----+ | | l -| | | | | | -| +----+ +----+ +----+ +----+ | s -| |tc0 | |tc1 | |tc2 | |tc0 | | p -| \ / \ / \ / \ / | a -| \ / \ / \ / \ / | c -| \/ \/ \/ \/ | e -| | | +-----+ | | -| | | | | | | -| | | | | | | -| | | | | | | -| +----+ +----+ +----+ +----+ +----+ | -| |txq0| |txq1| |txq2| |txq3| |txq4| | -| \ / \ / \ / \ / \ / | -| \ / \ / \ / \ / \ / | -| \/ \/ \/ \/ \/ | -| +-|------|------|------|--+ +--|--------------+ | -| | | | | | | Eth0.100 | | Eth1 | | -+---|------|------|------|------------------------|----------------+ - | | | | | - p p p p | - 3 2 0-1, 4-7 <- L2 priority | - | | | | | - | | | | | -+---|------|------|------|------------------------|----------------+ -| | | | | |----------+ | -| +----+ +----+ +----+ +----+ +----+ | -| |dma7| |dma6| |dma5| |dma4| |dma3| | -| \ / \ / \ / \ / \ / | c -| \S / \S / \ / \ / \ / | p -| \/ \/ \/ \/ \/ | s -| | | | +----- | | w -| | | | | | | -| | | | | | | d -| +----+ +----+ +----+p p+----+ | r -| | | | | | |o o| | | i -| | f3 | | f2 | | f0 |r r| f0 | | v -| |tc0 | |tc1 | |tc2 |t t|tc0 | | e -| \CBS / \CBS / \CBS /1 2\CBS / | r -| \S / \S / \ / \ / | -| \/ \/ \/ \/ | -+------------------------------------------------------------------+ -========================================Eth==========================> - -1) -// Add 4 tx queues, for interface Eth0, and 1 tx queue for Eth1 -$ ethtool -L eth0 rx 1 tx 5 -rx unmodified, ignoring - -2) -// Check if num of queues is set correctly: -$ ethtool -l eth0 -Channel parameters for eth0: -Pre-set maximums: -RX: 8 -TX: 8 -Other: 0 -Combined: 0 -Current hardware settings: -RX: 1 -TX: 5 -Other: 0 -Combined: 0 - -3) -// TX queues must be rated starting from 0, so set bws for tx0 and tx1 -// Set rates 40 and 20 Mb/s appropriately. -// Pay attention, real speed can differ a bit due to discreetness. -// Leave last 2 tx queues not rated. -$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate -$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate - -4) -// Check maximum rate of tx (cpdma) queues: -$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate -40 -20 -0 -0 -0 - -5) -// Map skb->priority to traffic class: -// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 -// Map traffic class to transmit queue: -// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq2, txq3) -$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ -map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@2 hw 1 - -5a) -// As two interface sharing same set of tx queues, assign all traffic -// coming to interface Eth1 to separate queue in order to not mix it -// with traffic from interface Eth0, so use separate txq to send -// packets to Eth1, so all prio -> tc0 and tc0 -> txq4 -// Here hw 0, so here still default configuration for eth1 in hw -$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 1 \ -map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@4 hw 0 - -6) -// Check classes settings -$ tc -g class show dev eth0 -+---(100:ffe2) mqprio -| +---(100:3) mqprio -| +---(100:4) mqprio -| -+---(100:ffe1) mqprio -| +---(100:2) mqprio -| -+---(100:ffe0) mqprio - +---(100:1) mqprio - -$ tc -g class show dev eth1 -+---(100:ffe0) mqprio - +---(100:5) mqprio - -7) -// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc -// Set it +1 Mb for reserve (important!) -// here only idle slope is important, others arg are ignored -// Pay attention, real speed can differ a bit due to discreetness -$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1438 \ -hicredit 62 sendslope -959000 idleslope 41000 offload 1 -net eth0: set FIFO3 bw = 50 - -8) -// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc: -// Set it +1 Mb for reserve (important!) -$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1468 \ -hicredit 65 sendslope -979000 idleslope 21000 offload 1 -net eth0: set FIFO2 bw = 30 - -9) -// Create vlan 100 to map sk->priority to vlan qos -$ ip link add link eth0 name eth0.100 type vlan id 100 -8021q: 802.1Q VLAN Support v1.8 -8021q: adding VLAN 0 to HW filter on device eth0 -8021q: adding VLAN 0 to HW filter on device eth1 -net eth0: Adding vlanid 100 to vlan filter - -10) -// Map skb->priority to L2 prio, 1 to 1 -$ ip link set eth0.100 type vlan \ -egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -11) -// Check egress map for vlan 100 -$ cat /proc/net/vlan/eth0.100 -[...] -INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 -EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -12) -// Run your appropriate tools with socket option "SO_PRIORITY" -// to 3 for class A and/or to 2 for class B -// (I took at https://www.spinics.net/lists/netdev/msg460869.html) -./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& -./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& - -13) -// run your listener on workstation (should be in same vlan) -// (I took at https://www.spinics.net/lists/netdev/msg460869.html) -./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39000 kbps - -14) -// Restore default configuration if needed -$ ip link del eth0.100 -$ tc qdisc del dev eth1 root -$ tc qdisc del dev eth0 root -net eth0: Prev FIFO2 is shaped -net eth0: set FIFO3 bw = 0 -net eth0: set FIFO2 bw = 0 -$ ethtool -L eth0 rx 1 tx 1 - -********************************************************************* -********************************************************************* -********************************************************************* -Example 2: Two port tx AVB configuration scheme for target board ----------------------------------------------------------------------- -(prints and scheme for AM572x evm, for dual emac boards only) - -+------------------------------------------------------------------+ u -| +----------+ +----------+ +------+ +----------+ +----------+ | s -| | | | | | | | | | | | e -| | App 1 | | App 2 | | Apps | | App 3 | | App 4 | | r -| | Class A | | Class B | | Rest | | Class B | | Class A | | -| | Eth0 | | Eth0 | | | | | Eth1 | | Eth1 | | s -| | VLAN100 | | VLAN100 | | | | | VLAN100 | | VLAN100 | | p -| | 40 Mb/s | | 20 Mb/s | | | | | 10 Mb/s | | 30 Mb/s | | a -| | SO_PRI=3 | | SO_PRI=2 | | | | | SO_PRI=3 | | SO_PRI=2 | | c -| | | | | | | | | | | | | | | | | e -| +---|------+ +---|------+ +---|--+ +---|------+ +---|------+ | -+-----|-------------|-------------|---------|-------------|--------+ - +-+ +-------+ | +----------+ +----+ - | | +-------+------+ | | - | | | | | | -+---|-------|-------------|--------------|-------------|-------|---+ -| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | -| | p3 | | p2 | | p1 | | p0 | | p0 | | p1 | | p2 | | p3 | | k -| \ / \ / \ / \ / \ / \ / \ / \ / | e -| \ / \ / \ / \ / \ / \ / \ / \ / | r -| \/ \/ \/ \/ \/ \/ \/ \/ | n -| | | | | | | | e -| | | +----+ +----+ | | | l -| | | | | | | | -| +----+ +----+ +----+ +----+ +----+ +----+ | s -| |tc0 | |tc1 | |tc2 | |tc2 | |tc1 | |tc0 | | p -| \ / \ / \ / \ / \ / \ / | a -| \ / \ / \ / \ / \ / \ / | c -| \/ \/ \/ \/ \/ \/ | e -| | | +-----+ +-----+ | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | E E | | | | | -| +----+ +----+ +----+ +----+ t t +----+ +----+ +----+ +----+ | -| |txq0| |txq1| |txq4| |txq5| h h |txq6| |txq7| |txq3| |txq2| | -| \ / \ / \ / \ / 0 1 \ / \ / \ / \ / | -| \ / \ / \ / \ / . . \ / \ / \ / \ / | -| \/ \/ \/ \/ 1 1 \/ \/ \/ \/ | -| +-|------|------|------|--+ 0 0 +-|------|------|------|--+ | -| | | | | | | 0 0 | | | | | | | -+---|------|------|------|---------------|------|------|------|----+ - | | | | | | | | - p p p p p p p p - 3 2 0-1, 4-7 <-L2 pri-> 0-1, 4-7 2 3 - | | | | | | | | - | | | | | | | | -+---|------|------|------|---------------|------|------|------|----+ -| | | | | | | | | | -| +----+ +----+ +----+ +----+ +----+ +----+ +----+ +----+ | -| |dma7| |dma6| |dma3| |dma2| |dma1| |dma0| |dma4| |dma5| | -| \ / \ / \ / \ / \ / \ / \ / \ / | c -| \S / \S / \ / \ / \ / \ / \S / \S / | p -| \/ \/ \/ \/ \/ \/ \/ \/ | s -| | | | +----- | | | | | w -| | | | | +----+ | | | | -| | | | | | | | | | d -| +----+ +----+ +----+p p+----+ +----+ +----+ | r -| | | | | | |o o| | | | | | | i -| | f3 | | f2 | | f0 |r CPSW r| f3 | | f2 | | f0 | | v -| |tc0 | |tc1 | |tc2 |t t|tc0 | |tc1 | |tc2 | | e -| \CBS / \CBS / \CBS /1 2\CBS / \CBS / \CBS / | r -| \S / \S / \ / \S / \S / \ / | -| \/ \/ \/ \/ \/ \/ | -+------------------------------------------------------------------+ -========================================Eth==========================> - -1) -// Add 8 tx queues, for interface Eth0, but they are common, so are accessed -// by two interfaces Eth0 and Eth1. -$ ethtool -L eth1 rx 1 tx 8 -rx unmodified, ignoring - -2) -// Check if num of queues is set correctly: -$ ethtool -l eth0 -Channel parameters for eth0: -Pre-set maximums: -RX: 8 -TX: 8 -Other: 0 -Combined: 0 -Current hardware settings: -RX: 1 -TX: 8 -Other: 0 -Combined: 0 - -3) -// TX queues must be rated starting from 0, so set bws for tx0 and tx1 for Eth0 -// and for tx2 and tx3 for Eth1. That is, rates 40 and 20 Mb/s appropriately -// for Eth0 and 30 and 10 Mb/s for Eth1. -// Real speed can differ a bit due to discreetness -// Leave last 4 tx queues as not rated -$ echo 40 > /sys/class/net/eth0/queues/tx-0/tx_maxrate -$ echo 20 > /sys/class/net/eth0/queues/tx-1/tx_maxrate -$ echo 30 > /sys/class/net/eth1/queues/tx-2/tx_maxrate -$ echo 10 > /sys/class/net/eth1/queues/tx-3/tx_maxrate - -4) -// Check maximum rate of tx (cpdma) queues: -$ cat /sys/class/net/eth0/queues/tx-*/tx_maxrate -40 -20 -30 -10 -0 -0 -0 -0 - -5) -// Map skb->priority to traffic class for Eth0: -// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 -// Map traffic class to transmit queue: -// tc0 -> txq0, tc1 -> txq1, tc2 -> (txq4, txq5) -$ tc qdisc replace dev eth0 handle 100: parent root mqprio num_tc 3 \ -map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@0 1@1 2@4 hw 1 - -6) -// Check classes settings -$ tc -g class show dev eth0 -+---(100:ffe2) mqprio -| +---(100:5) mqprio -| +---(100:6) mqprio -| -+---(100:ffe1) mqprio -| +---(100:2) mqprio -| -+---(100:ffe0) mqprio - +---(100:1) mqprio - -7) -// Set rate for class A - 41 Mbit (tc0, txq0) using CBS Qdisc for Eth0 -// here only idle slope is important, others ignored -// Real speed can differ a bit due to discreetness -$ tc qdisc add dev eth0 parent 100:1 cbs locredit -1470 \ -hicredit 62 sendslope -959000 idleslope 41000 offload 1 -net eth0: set FIFO3 bw = 50 - -8) -// Set rate for class B - 21 Mbit (tc1, txq1) using CBS Qdisc for Eth0 -$ tc qdisc add dev eth0 parent 100:2 cbs locredit -1470 \ -hicredit 65 sendslope -979000 idleslope 21000 offload 1 -net eth0: set FIFO2 bw = 30 - -9) -// Create vlan 100 to map sk->priority to vlan qos for Eth0 -$ ip link add link eth0 name eth0.100 type vlan id 100 -net eth0: Adding vlanid 100 to vlan filter - -10) -// Map skb->priority to L2 prio for Eth0.100, one to one -$ ip link set eth0.100 type vlan \ -egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -11) -// Check egress map for vlan 100 -$ cat /proc/net/vlan/eth0.100 -[...] -INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 -EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -12) -// Map skb->priority to traffic class for Eth1: -// 3pri -> tc0, 2pri -> tc1, (0,1,4-7)pri -> tc2 -// Map traffic class to transmit queue: -// tc0 -> txq2, tc1 -> txq3, tc2 -> (txq6, txq7) -$ tc qdisc replace dev eth1 handle 100: parent root mqprio num_tc 3 \ -map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 queues 1@2 1@3 2@6 hw 1 - -13) -// Check classes settings -$ tc -g class show dev eth1 -+---(100:ffe2) mqprio -| +---(100:7) mqprio -| +---(100:8) mqprio -| -+---(100:ffe1) mqprio -| +---(100:4) mqprio -| -+---(100:ffe0) mqprio - +---(100:3) mqprio - -14) -// Set rate for class A - 31 Mbit (tc0, txq2) using CBS Qdisc for Eth1 -// here only idle slope is important, others ignored, but calculated -// for interface speed - 100Mb for eth1 port. -// Set it +1 Mb for reserve (important!) -$ tc qdisc add dev eth1 parent 100:3 cbs locredit -1035 \ -hicredit 465 sendslope -69000 idleslope 31000 offload 1 -net eth1: set FIFO3 bw = 31 - -15) -// Set rate for class B - 11 Mbit (tc1, txq3) using CBS Qdisc for Eth1 -// Set it +1 Mb for reserve (important!) -$ tc qdisc add dev eth1 parent 100:4 cbs locredit -1335 \ -hicredit 405 sendslope -89000 idleslope 11000 offload 1 -net eth1: set FIFO2 bw = 11 - -16) -// Create vlan 100 to map sk->priority to vlan qos for Eth1 -$ ip link add link eth1 name eth1.100 type vlan id 100 -net eth1: Adding vlanid 100 to vlan filter - -17) -// Map skb->priority to L2 prio for Eth1.100, one to one -$ ip link set eth1.100 type vlan \ -egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -18) -// Check egress map for vlan 100 -$ cat /proc/net/vlan/eth1.100 -[...] -INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 -EGRESS priority mappings: 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7 - -19) -// Run appropriate tools with socket option "SO_PRIORITY" to 3 -// for class A and to 2 for class B. For both interfaces -./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p2 -s 1500& -./tsn_talker -d 18:03:73:66:87:42 -i eth0.100 -p3 -s 1500& -./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p2 -s 1500& -./tsn_talker -d 20:cf:30:85:7d:fd -i eth1.100 -p3 -s 1500& - -20) -// run your listener on workstation (should be in same vlan) -// (I took at https://www.spinics.net/lists/netdev/msg460869.html) -./tsn_listener -d 18:03:73:66:87:42 -i enp5s0 -s 1500 -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39012 kbps -Receiving data rate: 39000 kbps - -21) -// Restore default configuration if needed -$ ip link del eth1.100 -$ ip link del eth0.100 -$ tc qdisc del dev eth1 root -net eth1: Prev FIFO2 is shaped -net eth1: set FIFO3 bw = 0 -net eth1: set FIFO2 bw = 0 -$ tc qdisc del dev eth0 root -net eth0: Prev FIFO2 is shaped -net eth0: set FIFO3 bw = 0 -net eth0: set FIFO2 bw = 0 -$ ethtool -L eth0 rx 1 tx 1 |