enetc: Use generic rule to map Tx rings to interrupt vectors
Even if the current mapping is correct for the 1 CPU and 2 CPU cases (currently enetc is included in SoCs with up to 2 CPUs only), better use a generic rule for the mapping to cover all possible cases. The number of CPUs is the same as the number of interrupt vectors: Per device Tx rings - device_tx_ring[idx], where idx = 0..n_rings_total-1 Per interrupt vector Tx rings - int_vector[i].ring[j], where i = 0..n_int_vects-1 j = 0..n_rings_per_v-1 Mapping rule - n_rings_per_v = n_rings_total / n_int_vects for i = 0..n_int_vects - 1: for j = 0..n_rings_per_v - 1: idx = n_int_vects * j + i int_vector[i].ring[j] <- device_tx_ring[idx] Signed-off-by:Claudiu Manoil <claudiu.manoil@nxp.com> Tested-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20210409071613.28912-1-claudiu.manoil@nxp.com Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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