Mike Marciniszyn 38fd98afee IB/hfi1: Add atomic triggered sleep/wakeup ... When running iperf in a two host configuration the following trace can occur: [ 319.728730] NETDEV WATCHDOG: ib0 (hfi1): transmit queue 0 timed out The issue happens because the current implementation relies on the netif txq being stopped to control the flushing of the tx list. There are two resources that the transmit logic can wait on and stop the txq: - SDMA descriptors - Ring space to hold completions The ring space is tested on the sending side and relieved when the ring is consumed in the napi tx reaping. Unfortunately, that reaping can run conncurrently with the workqueue flushing of the txlist. If the txq is started just before the workitem executes, the txlist will never be flushed, leading to the txq being stuck. Fix by: - Adding sleep/wakeup wrappers * Use an atomic to control the call to the netif routines inside the wrappers - Use another atomic to record ring space exhaustion * Only wakeup when the a ring space exhaustion has happened and it relieved Add additional wrappers to clarify the ring space resource handling. Fixes: d99dc602e2 ("IB/hfi1: Add functions to transmit datagram ipoib packets") Link: https://lore.kernel.org/r/20200623204327.108092.4024.stgit@awfm-01.aw.intel.com Reviewed-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>		2020-06-24 16:13:38 -03:00
..
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	IB/hfi1: Add functions to receive accelerated ipoib packets	2020-05-21 11:23:56 -03:00
affinity.c	IB/hfi1: Add interrupt handler functions for accelerated ipoib	2020-05-21 11:23:56 -03:00
affinity.h	IB/hfi1: Add interrupt handler functions for accelerated ipoib	2020-05-21 11:23:56 -03:00
aspm.c	IB/hfi1: Reduce excessive aspm inlines	2019-06-28 22:34:26 -03:00
aspm.h	IB/hfi1: Reduce excessive aspm inlines	2019-06-28 22:34:26 -03:00
chip.c	IB/hfi1: Fix spelling mistake "enought" -> "enough"	2020-05-29 15:27:51 -03:00
chip.h	IB/hfi1: Add interrupt handler functions for accelerated ipoib	2020-05-21 11:23:56 -03:00
chip_registers.h	IB/hfi1: Add RcvShortLengthErrCnt to hfi1stats	2020-01-10 10:57:17 -04:00
common.h	IB/hfi1: Enable the transmit side of the datagram ipoib netdev	2020-05-21 11:23:58 -03:00
debugfs.c	IB/hfi1: Fix module use count flaw due to leftover module put calls	2020-06-24 15:54:08 -03:00
debugfs.h	infiniband: hfi1: drop crazy DEBUGFS_SEQ_FILE_CREATE() macro	2019-01-24 09:22:29 -07:00
device.c	infiniband: utilize the new cdev_set_parent function	2017-03-21 06:44:33 +01:00
device.h	…
driver.c	IB/hfi1: Add packet histogram trace event	2020-05-21 11:23:57 -03:00
efivar.c	infiniband: hfi1: Use EFI GetVariable only when available	2020-02-23 21:59:42 +01:00
efivar.h	…
eprom.c	IB/hfi1: Check eeprom config partition validity	2017-09-27 11:10:36 -04:00
eprom.h	IB/hfi1: Add ability to read platform config from the EPROM	2016-10-02 08:42:20 -04:00
exp_rcv.c	IB/hfi1: Remove WARN_ON when freeing expected receive groups	2019-04-03 15:27:30 -03:00
exp_rcv.h	IB/hfi1: Cleanup of exp_rcv	2018-05-24 09:39:25 -06:00
fault.c	IB/hfi1: Use scnprintf() for avoiding potential buffer overflow	2020-03-26 15:06:14 -03:00
fault.h	IB/hfi1: Rework fault injection machinery	2018-05-09 15:53:30 -04:00
file_ops.c	IB/hfi1: Remove module parameter for KDETH qpns	2020-05-21 11:23:54 -03:00
firmware.c	IB/hfi1: Fix infinite loop in 8051 command error path	2018-01-05 13:34:55 -05:00
hfi.h	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
init.c	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
intr.c	IB/hfi1: Allow MgmtAllowed on B2B setups	2017-11-13 15:53:56 -05:00
iowait.c	IB/hfi1: Don't cancel unused work item	2020-01-03 16:41:51 -04:00
iowait.h	RDMA/hfi1: Fix trivial mis-spelling of 'descriptor'	2020-06-15 15:56:54 -03:00
ipoib.h	IB/hfi1: Add atomic triggered sleep/wakeup	2020-06-24 16:13:38 -03:00
ipoib_main.c	IB/hfi1: Add rx functions for dummy netdev	2020-05-21 11:23:56 -03:00
ipoib_rx.c	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
ipoib_tx.c	IB/hfi1: Add atomic triggered sleep/wakeup	2020-06-24 16:13:38 -03:00
mad.c	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
mad.h	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
mmu_rb.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
mmu_rb.h	IB/hfi1: Don't remove RB entry when not needed.	2017-06-27 16:56:33 -04:00
msix.c	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
msix.h	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
netdev.h	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
netdev_rx.c	IB/hfi1: Restore kfree in dummy_netdev cleanup	2020-06-24 15:54:08 -03:00
opa_compat.h	IB/hfi1: Document phys port state bits not used in IB	2017-08-22 14:22:37 -04:00
opfn.c	IB/hfi1: Add TID RDMA retry timer	2019-02-05 18:07:43 -05:00
opfn.h	IB/hfi1: Make opfn.h self sufficient	2019-04-24 11:31:49 -03:00
pcie.c	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
pio.c	Linux 5.2-rc6	2019-06-28 21:18:23 -03:00
pio.h	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
pio_copy.c	IB/hfi1: Optimize pio_buf and send_context structs	2016-11-15 16:37:27 -05:00
platform.c	IB/hfi1: remove redundant assignment to variable ret	2019-11-25 10:31:47 -04:00
platform.h	IB/hfi1: Define platform_config_table_limits once	2016-12-11 15:29:42 -05:00
qp.c	IB/ipoib: Increase ipoib Datagram mode MTU's upper limit	2020-05-21 11:23:55 -03:00
qp.h	IB/hfi1: Add the dual leg code	2019-02-05 18:07:44 -05:00
qsfp.c	IB/{hfi1, rdmavt}: Fix memory leak in hfi1_alloc_devdata() upon failure	2018-05-03 15:24:48 -04:00
qsfp.h	IB/hfi1: Fetch monitor values on-demand for CableInfo query	2016-08-22 14:31:41 -04:00
rc.c	IB/hfi1: use true,false for bool variable	2020-01-03 19:13:59 -04:00
rc.h	IB/hfi1: Delay the release of destination mr for TID RDMA WRITE DATA	2019-04-03 15:27:30 -03:00
ruc.c	IB/{rdmavt, hfi1): Miscellaneous comment fixes	2019-04-24 11:31:48 -03:00
sdma.c	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
sdma.h	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
sdma_txreq.h	IB/hfi1: Prioritize the sending of ACK packets	2019-02-05 18:07:44 -05:00
sysfs.c	IB/hfi1: Call kobject_put() when kobject_init_and_add() fails	2020-03-27 13:13:36 -03:00
tid_rdma.c	IB/hfi1: Remove module parameter for KDETH qpns	2020-05-21 11:23:54 -03:00
tid_rdma.h	IB/hfi1: Calculate flow weight based on QP MTU for TID RDMA	2019-11-06 13:15:36 -04:00
trace.c	IB/hfi1: Add packet histogram trace event	2020-05-21 11:23:57 -03:00
trace.h	IB/hfi1: Add static trace for OPFN	2019-01-31 11:37:40 -05:00
trace_ctxts.h	IB/hfi1: Add packet histogram trace event	2020-05-21 11:23:57 -03:00
trace_dbg.h	IB/hfi1: Fix two format strings	2019-03-28 11:03:49 -03:00
trace_ibhdrs.h	IB/hfi1: Add missing INVALIDATE opcodes for trace	2019-06-28 22:34:26 -03:00
trace_iowait.h	IB/hfi1: Add static trace for iowait	2018-09-30 19:21:12 -06:00
trace_misc.h	IB/hfi1: Add traces for TID operations	2017-06-27 16:58:13 -04:00
trace_mmu.h	IB/hif1: Remove static tracing from SDMA hot path	2017-08-28 19:12:27 -04:00
trace_rc.h	IB/hfi1: Add static trace for TID RDMA READ protocol	2019-02-05 17:53:56 -05:00
trace_rx.h	IB/hfi1: Add fast and slow handlers for receive context	2020-01-10 10:57:16 -04:00
trace_tid.h	ftrace: Rework event_create_dir()	2019-11-27 07:44:25 +01:00
trace_tx.h	ftrace: Rework event_create_dir()	2019-11-27 07:44:25 +01:00
uc.c	IB/{hfi1, qib, rdmavt}: Put qp in error state when cq is full	2019-06-28 22:34:26 -03:00
ud.c	IB/{rdmavt, hfi1, qib}: Add helpers to hide SWQE WR details	2019-06-28 22:34:26 -03:00
user_exp_rcv.c	hfi1: get rid of pointless access_ok()	2020-05-29 11:06:32 -04:00
user_exp_rcv.h	RDMA: Replace zero-length array with flexible-array member	2020-02-20 13:33:51 -04:00
user_pages.c	mm, tree-wide: rename put_user_page*() to unpin_user_page*()	2020-01-31 10:30:38 -08:00
user_sdma.c	IB/hfi1: Fix another case where pq is left on waitlist	2020-05-12 11:47:48 -03:00
user_sdma.h	IB/hfi1: Remove unused define	2019-07-22 16:10:48 -03:00
verbs.c	RDMA: Remove 'max_map_per_fmr'	2020-06-02 20:32:54 -03:00
verbs.h	treewide: Use sizeof_field() macro	2019-12-09 10:36:44 -08:00
verbs_txreq.c	IB/hfi1: Silence txreq allocation warnings	2019-06-17 21:15:40 -04:00
verbs_txreq.h	RDMA/hfi1: Fix trivial mis-spelling of 'descriptor'	2020-06-15 15:56:54 -03:00
vnic.h	IB/hfi1: Activate the dummy netdev	2020-05-21 11:23:56 -03:00
vnic_main.c	IB/hfi1: Fix hfi1_netdev_rx_init() error handling	2020-06-02 20:32:54 -03:00
vnic_sdma.c	net: Use skb_frag_off accessors	2019-07-30 14:21:32 -07:00