diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-09-20 00:42:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-20 20:00:18 +0300 |
| commit | 93c6eddad8473bc6582b865200add350ddab40ea (patch) | |
| tree | 5a7c4b938a56860c19fd887b89f9d8e94fc31917 /drivers/net/ethernet/netronome | |
| parent | 947ef993e0cbd389f25c6deb545fc78bb55f7f55 (diff) | |
| download | linux-93c6eddad8473bc6582b865200add350ddab40ea.tar.xz | |
nfp: provide a better warning when ring allocation fails
[ Upstream commit 23d9f5531c7c28546954b0bf332134a9b8a38c0a ]
NFP supports fairly enormous ring sizes (up to 256k descriptors).
In commit 466271703867 ("nfp: use kvcalloc() to allocate SW buffer
descriptor arrays") we have started using kvcalloc() functions to
make sure the allocation of software state arrays doesn't hit
the MAX_ORDER limit. Unfortunately, we can't use virtual mappings
for the DMA region holding HW descriptors. In case this allocation
fails instead of the generic (and fairly scary) warning/splat in
the logs print a helpful message explaining what happened and
suggesting how to fix it.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/netronome')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 6df2c8b2ce6f..bffa25d6dc29 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -2169,9 +2169,13 @@ nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; tx_ring->txds = dma_zalloc_coherent(dp->dev, tx_ring->size, - &tx_ring->dma, GFP_KERNEL); - if (!tx_ring->txds) + &tx_ring->dma, + GFP_KERNEL | __GFP_NOWARN); + if (!tx_ring->txds) { + netdev_warn(dp->netdev, "failed to allocate TX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", + tx_ring->cnt); goto err_alloc; + } sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); @@ -2314,9 +2318,13 @@ nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring) rx_ring->cnt = dp->rxd_cnt; rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; rx_ring->rxds = dma_zalloc_coherent(dp->dev, rx_ring->size, - &rx_ring->dma, GFP_KERNEL); - if (!rx_ring->rxds) + &rx_ring->dma, + GFP_KERNEL | __GFP_NOWARN); + if (!rx_ring->rxds) { + netdev_warn(dp->netdev, "failed to allocate RX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", + rx_ring->cnt); goto err_alloc; + } sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); |