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| author | Krzysztof Galazka <krzysztof.galazka@intel.com> | 2021-04-05 18:08:33 +0000 |
|---|---|---|
| committer | Eric Joyner <erj@FreeBSD.org> | 2021-04-05 18:17:55 +0000 |
| commit | 20a52706c814ccfd91c65586404abd2a1563a330 (patch) | |
| tree | 67a1125049ff40c7add28c430d59a7fd24892f8a /sys/dev/ixl/if_ixl.c | |
| parent | 741223a65cd1752360c44341b762295f633e21cf (diff) | |
| download | src-20a52706c814ccfd91c65586404abd2a1563a330.tar.gz src-20a52706c814ccfd91c65586404abd2a1563a330.zip | |
ixl(4): Add tunable to override Flow Control settings
Add flow_control to hw.ixl tunables tree to let override
initial flow control configuration for all interfaces.
Keep using configuration set by NVM by default.
Reviewed by: erj@, gallatin@
Tested by: gowtham.kumar.ks_intel.com
MFC after: 1 week
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D29338
Diffstat (limited to 'sys/dev/ixl/if_ixl.c')
| -rw-r--r-- | sys/dev/ixl/if_ixl.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys/dev/ixl/if_ixl.c b/sys/dev/ixl/if_ixl.c index c700af889cf1..3b49da5d76b9 100644 --- a/sys/dev/ixl/if_ixl.c +++ b/sys/dev/ixl/if_ixl.c @@ -304,6 +304,10 @@ TUNABLE_INT("hw.ixl.tx_itr", &ixl_tx_itr); SYSCTL_INT(_hw_ixl, OID_AUTO, tx_itr, CTLFLAG_RDTUN, &ixl_tx_itr, 0, "TX Interrupt Rate"); +static int ixl_flow_control = -1; +SYSCTL_INT(_hw_ixl, OID_AUTO, flow_control, CTLFLAG_RDTUN, + &ixl_flow_control, 0, "Initial Flow Control setting"); + #ifdef IXL_IW int ixl_enable_iwarp = 0; TUNABLE_INT("hw.ixl.enable_iwarp", &ixl_enable_iwarp); @@ -1892,5 +1896,20 @@ ixl_save_pf_tunables(struct ixl_pf *pf) pf->rx_itr = IXL_ITR_8K; } else pf->rx_itr = ixl_rx_itr; + + pf->fc = -1; + if (ixl_flow_control != -1) { + if (ixl_flow_control < 0 || ixl_flow_control > 3) { + device_printf(dev, + "Invalid flow_control value of %d set!\n", + ixl_flow_control); + device_printf(dev, + "flow_control must be between %d and %d, " + "inclusive\n", 0, 3); + device_printf(dev, + "Using default configuration instead\n"); + } else + pf->fc = ixl_flow_control; + } } |