sfc: Disable RSS when using SR-IOV and only 1 RX queue on the PF (634ab72c) · Commits · 戴 / test

On Siena, VFs share RSS configuration with the PF. We attempted to support configurations where the PF only uses 1 RX queue and VFs use multiple RX queues, by (1) setting up RSS for the number of RX queues per VF (2) disabling RSS in the PF's RX default filters. Unfortunately commit ('sfc: Add SR-IOV back-end support for SFC9000 family') only included (1). This is (2). Signed-off-by:

Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/filter.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -414,8 +414,12 @@ static void efx_filter_reset_rx_def(struct efx_nic *efx, unsigned filter_idx)
		struct efx_filter_table *table = &state->table[EFX_FILTER_TABLE_RX_DEF];
		struct efx_filter_spec *spec = &table->spec[filter_idx];

		/* If there's only one channel then disable RSS for non VF
		* traffic, thereby allowing VFs to use RSS when the PF can't.
		*/
		efx_filter_init_rx(spec, EFX_FILTER_PRI_MANUAL,
		EFX_FILTER_FLAG_RX_RSS, 0);
		efx->n_rx_channels > 1 ? EFX_FILTER_FLAG_RX_RSS : 0,
		0);
		spec->type = EFX_FILTER_UC_DEF + filter_idx;
		table->used_bitmap[0] \|= 1 << filter_idx;
		}

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