diff options
| -rw-r--r-- | drivers/net/mhi/mhi.h | 1 | ||||
| -rw-r--r-- | drivers/net/mhi/net.c | 4 | ||||
| -rw-r--r-- | drivers/net/mhi/proto_mbim.c | 11 |
3 files changed, 15 insertions, 1 deletions
diff --git a/drivers/net/mhi/mhi.h b/drivers/net/mhi/mhi.h index 12e7407d712a..1d0c499d27a3 100644 --- a/drivers/net/mhi/mhi.h +++ b/drivers/net/mhi/mhi.h @@ -29,6 +29,7 @@ struct mhi_net_dev { struct mhi_net_stats stats; u32 rx_queue_sz; int msg_enable; + unsigned int mru; }; struct mhi_net_proto { diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c index f59960876083..5ec7a29f668d 100644 --- a/drivers/net/mhi/net.c +++ b/drivers/net/mhi/net.c @@ -265,10 +265,12 @@ static void mhi_net_rx_refill_work(struct work_struct *work) rx_refill.work); struct net_device *ndev = mhi_netdev->ndev; struct mhi_device *mdev = mhi_netdev->mdev; - int size = READ_ONCE(ndev->mtu); struct sk_buff *skb; + unsigned int size; int err; + size = mhi_netdev->mru ? mhi_netdev->mru : READ_ONCE(ndev->mtu); + while (!mhi_queue_is_full(mdev, DMA_FROM_DEVICE)) { skb = netdev_alloc_skb(ndev, size); if (unlikely(!skb)) diff --git a/drivers/net/mhi/proto_mbim.c b/drivers/net/mhi/proto_mbim.c index 5a176c3eed53..fc72b3f6ec9e 100644 --- a/drivers/net/mhi/proto_mbim.c +++ b/drivers/net/mhi/proto_mbim.c @@ -26,6 +26,15 @@ #define MBIM_NDP16_SIGN_MASK 0x00ffffff +/* Usual WWAN MTU */ +#define MHI_MBIM_DEFAULT_MTU 1500 + +/* 3500 allows to optimize skb allocation, the skbs will basically fit in + * one 4K page. Large MBIM packets will simply be split over several MHI + * transfers and chained by the MHI net layer (zerocopy). + */ +#define MHI_MBIM_DEFAULT_MRU 3500 + struct mbim_context { u16 rx_seq; u16 tx_seq; @@ -281,6 +290,8 @@ static int mbim_init(struct mhi_net_dev *mhi_netdev) return -ENOMEM; ndev->needed_headroom = sizeof(struct mbim_tx_hdr); + ndev->mtu = MHI_MBIM_DEFAULT_MTU; + mhi_netdev->mru = MHI_MBIM_DEFAULT_MRU; return 0; } |