- 21 Jul, 2016 11 commits
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Martin KaFai Lau authored
Add a '-6' option to the sample pktgen scripts for sending out IPv6 packets. [root@kerneldev010.prn1 ~/pktgen]# ./pktgen_sample03_burst_single_flow.sh -i eth0 -s 64 -d fe80::f652:14ff:fec2:a14c -m f4:52:14:c2:a1:4c -b 32 -6 [root@kerneldev011.prn1 ~]# tcpdump -i eth0 -nn -c3 port 9 tcpdump: WARNING: eth0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 14:38:51.815297 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16 14:38:51.815311 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16 14:38:51.815313 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16 Signed-off-by:
Martin KaFai Lau <kafai@fb.com> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Brenden Blanco says: ==================== misc cleanups for xdp This addresses several of the non-blocking comments left over from the xdp patch set. See individual patches for details. ==================== Signed-off-by: -
Brenden Blanco authored
The naming choice of index is not terribly descriptive, and dropcnt is in fact incorrect for xdp2. Pick better names for these: ipproto and rxcnt. Signed-off-by:
Brenden Blanco <bblanco@plumgrid.com> Acked-by:
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Brenden Blanco authored
The IFLA_XDP_ATTACHED nested attribute is meant for read-only, and while do_setlink properly ignores it, it should be more paranoid and reject commands that try to set it. Signed-off-by:
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Brenden Blanco authored
For consistency, and in order to hint at the synchronous nature of the xdp_prog field, use READ_ONCE in the destroy path of the ring. All occurrences should now use either READ_ONCE or xchg. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Jeff Kirsher says: ==================== 100GbE Intel Wired LAN Driver Updates 2016-07-20 This series contains updates to fm10k only. Ngai-Mint provides a fix to clear PCIE_GMBX bits to ensure the proper functioning of the mailbox global interrupt after a data path reset. Jake provides most of the patches in the series, starting with a early return from fm10k_down() if we are already down to prevent conflict with other threads. Fixed an issue where fm10k_update_stats() could cause a null pointer dereference, specifically if it is called when we are going down and the rings have been removed. Cleans up and fixes the data path reset flow, Tx hang routine and stop_hw(). Re-worked the fm10k_reinit() to be more maintainable and fixed several inconsistencies with the work flow. Implemented fm10k_prepare_suspend() and fm10k_handle_resume() which abstract around the now existing fm10k_prepare_for_reset and fm10k_handle_reset. The new functions also handle stopping the service task, which is something that the original re-init flow does not need. Fixed an issue where if an FLR occurs, VF devices will be knocked out of bus master mode, and the driver will be unable to recover from the reset properly, so ensure bus master is enabled after every reset. Fixed an issue where a reset will occur as if for no reason, regularly every few minutes until the switch manager software is loaded, which is caused by continuously requesting the lport map so only do the request after we have verified the switch mailbox is tx_ready. ==================== Signed-off-by: -
David S. Miller authored
Vivien Didelot says: ==================== net: dsa: mv88e6xxx: rework EEPROM code Some switches can access an optional external EEPROM via its registers. The 88E6352 family of switches have 8-bit address / 16-bit data access. The new 88E6390 family has 16-bit address / 8-bit data access. This patchset cleans up the EEPROM code with 16-suffixed Global2 helpers and makes it easy to add future support for 8-bit data EEPROM access. It also removes unnecessary mutexes and a few locked access functions. Changes in v2: - add missing Signed-off-by tag ==================== Signed-off-by: -
Vivien Didelot authored
Get rid of the last usage of the locked mv88e6xxx_reg_read function with a new mv88e6xxx_port_read helper, useful later for chips with different port registers base address. Signed-off-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Vivien Didelot authored
The 6352 family of switches and compatibles provide a 8-bit address and 16-bit data access to an optional EEPROM. Newer chip such as the 6390 family slightly changed the access to 16-bit address and 8-bit data. This commit cleans up the EEPROM access code for 16-bit access and makes it easy to eventually introduce future support for 8-bit access. Here's a list of notable changes brought by this patch: - provide Global2 unlocked helpers for EEPROM commands - remove eeprom_mutex, only reg_lock is necessary for driver functions - eeprom_len is 0 for chip without EEPROM, so return it directly - the Running bit must be 0 before r/w, so wait for Busy *and* Running - remove now unused mv88e6xxx_wait and mv88e6xxx_reg_write - other than that, the logic (in _{get,set}_eeprom16) didn't change Chips with an 8-bit EEPROM access will require to implement the 8-suffixed variant of G2 helpers and the related flag: #define MV88E6XXX_FLAGS_EEPROM8 \ (MV88E6XXX_FLAG_G2_EEPROM_CMD | \ MV88E6XXX_FLAG_G2_EEPROM_ADDR) Signed-off-by: -
Vivien Didelot authored
Only reg_lock is necessary now and phy_mutex is dead. Remove it. Signed-off-by:
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Gavin Shan authored
The initial MAC address is retrieved from hardware if it's not provided by device-tree. The reserved MAC address from hardware will be used if non-reserved MAC address is invalid. It will cause mismatched MAC address seen by hardware and software. This disallows using the reserved hardware MAC address to avoid the mismatched MAC address seen by hardware and software. Fixes: 113ce107 ("net/faraday: Read MAC address from chip") Suggested-by:
David Laight <David.Laight@ACULAB.COM> Suggested-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by:
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- 20 Jul, 2016 29 commits
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Jacob Keller authored
Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Tested-by:
Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Jacob Keller authored
The pci_enable_msix_range() function returns a positive value of the number of allocated vectors if it succeeds. On failure it returns a negative error code. Return this code properly so that the error message printed by the driver will show the actual error code instead of being masked by -ENOMEM. Signed-off-by:
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Jacob Keller authored
When we resume from an AER recovery with many active VFs, the PF sees many spurious link up and link down events. Prevent this by delaying link down for at least one second after the resume event. Signed-off-by:
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Jacob Keller authored
If the fm10k interface is brought up, but the switch manager software is not running, the driver will continuously request the lport map every few seconds in the base driver watchdog routine. Eventually after several minutes the switch mailbox Tx fifo will fill up and the mailbox will timeout, resulting in a reset. This reset will appear as if for no reason, and occurs regularly every few minutes until the switch manager software is loaded. Prevent this from happening by only requesting the lport map after we've verified the switch mailbox is tx_ready. In order to simplify code logic and reduce code duplication, implement this as a new function pointer "mac.ops.request_lport_map" which the VF will not implement. Otherwise, we have to duplicate the tx_ready check outside of fm10k_get_host_state_generic, or re-implement most of fm10k_get_host_state_generic in the pf version. The resulting code is simpler and easier to understand, and prevents the PF from continuously requesting lport map and filling the Tx fifo of a switch mailbox that isn't ready. Signed-off-by:
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Jacob Keller authored
Sometimes, a VF driver will lose PCIe address access, such as due to a PF FLR event. In fm10k_detach_subtask, poll and check whether the PCIe register space is active again and restore the device when it has. Signed-off-by:
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Jacob Keller authored
If an FLR occurs, VF devices will be knocked out of bus master mode, and the driver will be unable to recover from the reset properly, resulting in malicious driver events and an infinite reset loop. In the normal case, the bus master mode will already be enabled and this call will essentially be a no-op. Since we're doing this every reset, it is possible we could remove the other calls to pci_set_master() but it seems not harmful to just leave them in place. Signed-off-by:
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Jacob Keller authored
Continuing the effort to commonize the similar suspend/resume flows, finish up by using the new fm10k_handle_suspand and fm10k_handle_resume functions for the standard suspend/resume flow. Signed-off-by:
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Jacob Keller authored
When a function level PCI reset is triggered using sysfs, it calls the driver's .reset_notify error handler. Implement a handler based on the now split fm10k_prepare_for_reset and fm10k_handle_reset functions, so that we fully reset the driver when the PCI function level reset occurs. This also ensures the reset is handled in a clean way by first disabling all the driver bits first and then restoring them after the function reset. Previously the stack simply performed a blind function reset and our driver didn't take any part in the process. Signed-off-by:
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Jacob Keller authored
Now that we have extracted the necessary steps for a split suspend/resume flow, re-use these functions instead of using the current open coded flow. This ensures that we don't miss any steps. It also ensures that we have the correct driver states set. Since we'll be handling all of the reset flow ourselves, we no longer need to request a reset in the io_slot_reset() function. Signed-off-by:
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Jacob Keller authored
Implement fm10k_prepare_suspend and fm10k_handle_resume functions which abstract around the now existing fm10k_prepare_for_reset and fm10k_handle_reset. The new functions also handle stopping the service task, which is something that the original re-init flow does not need. Every other location that does a suspend/resume type flow is expected to use these functions, because otherwise they may have conflicts with the running watchdog routines. This also has the effect of preventing possible surprise remove events during handling of FLR events and PCIe errors. Signed-off-by:
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Jacob Keller authored
There are several flows in the driver which perform the similar function of tearing down software and restoring software to recover from certain errors or PCIe events, including: * fm10k_reinit * fm10k_suspend/resume * fm10k_io_error_detected/fm10k_io_resume In addition, we want to implement a .reset_notify() handler as well which will also perform similar function. Rework how the driver codes reset and resume flows by separating out the reinit logic into two functions "fm10k_prepare_for_reset" and "fm10k_handle_reset". This first step will allow us to re-use this functionality in the similar blocks of code instead of re-coding the same sequence of events slightly different. The end result should be more maintainable and correct, fixing several inconsistencies with the work flow. The new functions expect to take the rtnl_lock() themselves, and it does have the unfortunate side effect of having the reinit flow take then release then take the rtnl_lock. However, this minor downside is out weighted by the benefits of code reduction and reducing needless difference between these flows. Signed-off-by:
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Jacob Keller authored
It turns out that sometimes during a reset the Tx queues will be temporarily stuck longer than .stop_hw() expects. Work around this issue by attempting to .stop_hw() first. If it tails, wait a number of attempts until the Tx queues appear to be drained. After this, attempt stop_hw() again. This ensures that we avoid waiting if we don't need to, such as during the first initialization of a VF, and give the proper amount of time necessary to recover from most situations. It is possible that the hardware is actually stuck. For PFs, this is usually fixed by a datapath reset. Unfortunately the VF cannot request a similar reset for itself. Signed-off-by:
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Jacob Keller authored
When stop_hw() routine fails with FM10K_ERR_REQUESTS_PENDING, this indicates that the Tx or Rx queues did not shutdown within the time limit. Print a more suitable message at the dev_info level instead of dev_err. Signed-off-by:
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Jacob Keller authored
Signed-off-by:
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Jacob Keller authored
A while ago, an additional check for the switch being ready was added to reset_hw. A recent refactor accidentally made this check return an error code on failure which caused fm10k_probe to fail when the switch wasn't brought up first. The original reasoning for the check was to prevent additional data path reset when the fabric wasn't ready yet. However, there isn't a compelling reason to keep the check, as the data path reset will restore hardware to a known good state. Remove the check and perform the data path reset regardless of the switch manager state. An alternative fix is to return FM10K_SUCCESS instead, and bypass the actual data path reset. This should be fine as we will perform a reset_hw once the switch is active. However, since data path reset will reset many parts of the hardware it seems better to just perform the reset regardless of switch state. Signed-off-by:
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Jacob Keller authored
Don't report FM10K_ERR_REQUESTS_PENDING when we fail to disable queues within the timeout. This can occur due to a hardware Tx hang, or when the switch ethernet fabric is resetting while we are transmitting traffic. It can sometimes take up to 500ms before the Tx DMA engine gives up. Instead, just skip the DMA engine check and perform a data-path reset anyways. Add a statistic counter to keep track of the number of resets occurring while we have pending DMA on the rings. In order to prevent having to re-assign err to 0, re-order the last few items of the reset_hw_pf function so that we don't perform "return err" at the end. Signed-off-by:
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Ngai-Mint Kwan authored
When a data path reset is initiated, write control to the PCIE_GMBX is yanked from the switch manager. The switch manager writes to this register to clear mailbox global interrupt bits as part of its mailbox interrupt handling routine. When the device recovers from the data path reset and these bits are not cleared, it will prevent future mailbox global interrupts from being triggered. Upon confirming that the device has exited from a data path reset, clear these bits to ensure the proper functioning of the mailbox global interrupt. Signed-off-by:
Ngai-Mint Kwan <ngai-mint.kwan@intel.com> Signed-off-by:
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Jacob Keller authored
Also prevent updating stats while the interface is down. If we're already updating stats, just return doing nothing. When we take the device down, block stat updates until we come back up. This ensures that we avoid tearing down rings when we're updating statistics, and prevents updating statistics until we're up. We can't re-use the __FM10K_DOWN for this because it wouldn't prevent multiple threads from accessing statistics. Neither does it prevent the case where we start updating stats and then start going down in another thread. The fm10k_get_stats64 is except from this, because it has a completely different flow which does not suffer from the same issues as fm10k_update_stats might. Signed-off-by:
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Jacob Keller authored
It's currently possible for fm10k_update_stats to be called during the window when we go down and the rings are removed. This can result in a null pointer dereference. In fm10k_get_stats64 we work around this by using ACCESS_ONCE and a null pointer check inside the loop. Use this same flow in the fm10k_update_stats to avoid the potential null pointer. Signed-off-by:
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Jacob Keller authored
Return early from fm10k_down() when we are already down, since that means another thread is either already finished or has started going down, so shouldn't conflict with them. Signed-off-by:
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David S. Miller authored
Jiri Pirko says: ==================== mlxsw: Add per-{Prio,TC} counters Ido says: Add per-priority and per-tc counters, which are very useful for debugging purposes and fine-tuning. ==================== Signed-off-by: -
Ido Schimmel authored
Expose the transmit queue length of each traffic class and the amount of unicast packets discarded due to insufficient room in the shared buffer. The first counter allows us to debug user priority to traffic class mapping, whereas the drop counter is useful when determining shared buffer configuration. Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Ido Schimmel authored
Expose per-priority bytes / packets / PFC packets counters via ethtool. These counters are very useful when debugging QoS functionality and provide a better insight into the device's forwarding plane. Signed-off-by:
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Wei Yongjun authored
Add the missing free_netdev() before return from function cpmac_probe() in the error handling case. This patch revert commit 0465be8f ("net: cpmac: fix in releasing resources"), which changed to only free_netdev while register_netdev failed. Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
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Wei Yongjun authored
Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR. Generated by: scripts/coccinelle/api/ptr_ret.cocci Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Wei Yongjun authored
In ops->reset() error handling case, clk_disable_unprepare() is missed before return from this function. Signed-off-by:
Mans Rullgard <mans@mansr.com> Signed-off-by:
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Wei Yongjun authored
module_platform_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by:
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Wei Yongjun authored
Remove .owner field if calls are used which set it automatically. Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci Signed-off-by:
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Wei Yongjun authored
In case of error, the function of_parse_phandle() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Fixes: 46aa27df ('net: axienet: Use devm_* calls') Signed-off-by:
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