diff options
| author | Claudiu Manoil <claudiu.manoil@nxp.com> | 2021-04-09 09:16:13 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-04-10 03:22:09 +0200 |
| commit | 6c5e6b4ccc1bb9ac56579a9aed25d517d2318be6 (patch) | |
| tree | 93c528200ebed4a2845233a94ebd8695bf02cbaf /kernel | |
| parent | net: enetc: fix TX ring interrupt storm (diff) | |
| download | linux-6c5e6b4ccc1bb9ac56579a9aed25d517d2318be6.tar.xz linux-6c5e6b4ccc1bb9ac56579a9aed25d517d2318be6.zip | |
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>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions