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authorJakub Kicinski <jakub.kicinski@netronome.com>2016-10-31 23:43:16 +0300
committerDavid S. Miller <davem@davemloft.net>2016-11-01 18:04:59 +0300
commitb64b7bb6d492ef1bbe9aa9ed7eeb18f7148ece3d (patch)
tree95b9b52909c1762fa6e429401067ec4906ff90d1 /drivers/net/ethernet/netronome
parentc0f031bc88660e8b96060b76aa72fbe8859bdcc8 (diff)
downloadlinux-b64b7bb6d492ef1bbe9aa9ed7eeb18f7148ece3d.tar.xz
nfp: add separate buffer allocation function for napi
Introduce a separate buffer allocation function to be called from NAPI. We can make assumptions about the context and buffer size. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome')
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_net_common.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 449ec798a9b7..b43d2dbae368 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -1098,6 +1098,26 @@ nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr,
return frag;
}
+static void *nfp_net_napi_alloc_one(struct nfp_net *nn, dma_addr_t *dma_addr)
+{
+ void *frag;
+
+ frag = napi_alloc_frag(nn->fl_bufsz);
+ if (!frag) {
+ nn_warn_ratelimit(nn, "Failed to alloc receive page frag\n");
+ return NULL;
+ }
+
+ *dma_addr = nfp_net_dma_map_rx(nn, frag, nn->fl_bufsz, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) {
+ skb_free_frag(frag);
+ nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n");
+ return NULL;
+ }
+
+ return frag;
+}
+
/**
* nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings
* @rx_ring: RX ring structure
@@ -1413,8 +1433,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
nfp_net_rx_drop(r_vec, rx_ring, rxbuf, NULL);
continue;
}
- new_frag = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr,
- nn->fl_bufsz);
+ new_frag = nfp_net_napi_alloc_one(nn, &new_dma_addr);
if (unlikely(!new_frag)) {
nfp_net_rx_drop(r_vec, rx_ring, rxbuf, skb);
continue;