diff options
| author | Bharat Bhushan <bbhushan2@marvell.com> | 2024-12-04 08:56:52 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-12-09 15:15:30 +0300 |
| commit | 195c3d4631816f02071f0e01d2d2def51cf5067a (patch) | |
| tree | a6b618e06029683024c4c117641d88fc15852af0 | |
| parent | 7ea2745766d776866cfbc981b21ed3cfdf50124e (diff) | |
| download | linux-195c3d4631816f02071f0e01d2d2def51cf5067a.tar.xz | |
octeontx2-pf: map skb data as device writeable
Crypto hardware need write permission for in-place encrypt
or decrypt operation on skb-data to support IPsec crypto
offload. That patch uses skb_unshare to make skb data writeable
for ipsec crypto offload and map skb fragment memory as
device read-write.
Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c index 04bc06a80e23..3b0457e52a6a 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c @@ -11,6 +11,7 @@ #include <linux/bpf.h> #include <linux/bpf_trace.h> #include <net/ip6_checksum.h> +#include <net/xfrm.h> #include "otx2_reg.h" #include "otx2_common.h" @@ -83,10 +84,17 @@ static unsigned int frag_num(unsigned int i) static dma_addr_t otx2_dma_map_skb_frag(struct otx2_nic *pfvf, struct sk_buff *skb, int seg, int *len) { + enum dma_data_direction dir = DMA_TO_DEVICE; const skb_frag_t *frag; struct page *page; int offset; + /* Crypto hardware need write permission for ipsec crypto offload */ + if (unlikely(xfrm_offload(skb))) { + dir = DMA_BIDIRECTIONAL; + skb = skb_unshare(skb, GFP_ATOMIC); + } + /* First segment is always skb->data */ if (!seg) { page = virt_to_page(skb->data); @@ -98,16 +106,22 @@ static dma_addr_t otx2_dma_map_skb_frag(struct otx2_nic *pfvf, offset = skb_frag_off(frag); *len = skb_frag_size(frag); } - return otx2_dma_map_page(pfvf, page, offset, *len, DMA_TO_DEVICE); + return otx2_dma_map_page(pfvf, page, offset, *len, dir); } static void otx2_dma_unmap_skb_frags(struct otx2_nic *pfvf, struct sg_list *sg) { + enum dma_data_direction dir = DMA_TO_DEVICE; + struct sk_buff *skb = NULL; int seg; + skb = (struct sk_buff *)sg->skb; + if (unlikely(xfrm_offload(skb))) + dir = DMA_BIDIRECTIONAL; + for (seg = 0; seg < sg->num_segs; seg++) { otx2_dma_unmap_page(pfvf, sg->dma_addr[seg], - sg->size[seg], DMA_TO_DEVICE); + sg->size[seg], dir); } sg->num_segs = 0; } |