diff options
Diffstat (limited to 'debian/patches/features/all/ethernet-microsoft/0019-net-mana-Enable-RX-path-to-handle-various-MTU-sizes.patch')
| -rw-r--r-- | debian/patches/features/all/ethernet-microsoft/0019-net-mana-Enable-RX-path-to-handle-various-MTU-sizes.patch | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/debian/patches/features/all/ethernet-microsoft/0019-net-mana-Enable-RX-path-to-handle-various-MTU-sizes.patch b/debian/patches/features/all/ethernet-microsoft/0019-net-mana-Enable-RX-path-to-handle-various-MTU-sizes.patch new file mode 100644 index 000000000..7fb93c495 --- /dev/null +++ b/debian/patches/features/all/ethernet-microsoft/0019-net-mana-Enable-RX-path-to-handle-various-MTU-sizes.patch @@ -0,0 +1,147 @@ +From 8640f747acafd65c43be07bd7db9a431b5926db3 Mon Sep 17 00:00:00 2001 +From: Haiyang Zhang <haiyangz@microsoft.com> +Date: Wed, 12 Apr 2023 14:16:02 -0700 +Subject: [PATCH 19/23] net: mana: Enable RX path to handle various MTU sizes + +Update RX data path to allocate and use RX queue DMA buffers with +proper size based on potentially various MTU sizes. + +Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> +Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +(cherry picked from commit 2fbbd712baf1c60996554326728bbdbef5616e12) +Signed-off-by: Bastian Blank <waldi@debian.org> +--- + drivers/net/ethernet/microsoft/mana/mana_en.c | 38 ++++++++++++++----- + include/net/mana/mana.h | 7 ++++ + 2 files changed, 35 insertions(+), 10 deletions(-) + +diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c +index af0c0ee95d87..afbbe447de1d 100644 +--- a/drivers/net/ethernet/microsoft/mana/mana_en.c ++++ b/drivers/net/ethernet/microsoft/mana/mana_en.c +@@ -1185,10 +1185,10 @@ static void mana_post_pkt_rxq(struct mana_rxq *rxq) + WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); + } + +-static struct sk_buff *mana_build_skb(void *buf_va, uint pkt_len, +- struct xdp_buff *xdp) ++static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, ++ uint pkt_len, struct xdp_buff *xdp) + { +- struct sk_buff *skb = napi_build_skb(buf_va, PAGE_SIZE); ++ struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); + + if (!skb) + return NULL; +@@ -1196,11 +1196,12 @@ static struct sk_buff *mana_build_skb(void *buf_va, uint pkt_len, + if (xdp->data_hard_start) { + skb_reserve(skb, xdp->data - xdp->data_hard_start); + skb_put(skb, xdp->data_end - xdp->data); +- } else { +- skb_reserve(skb, XDP_PACKET_HEADROOM); +- skb_put(skb, pkt_len); ++ return skb; + } + ++ skb_reserve(skb, rxq->headroom); ++ skb_put(skb, pkt_len); ++ + return skb; + } + +@@ -1233,7 +1234,7 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, + if (act != XDP_PASS && act != XDP_TX) + goto drop_xdp; + +- skb = mana_build_skb(buf_va, pkt_len, &xdp); ++ skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); + + if (!skb) + goto drop; +@@ -1301,6 +1302,14 @@ static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, + if (rxq->xdp_save_va) { + va = rxq->xdp_save_va; + rxq->xdp_save_va = NULL; ++ } else if (rxq->alloc_size > PAGE_SIZE) { ++ if (is_napi) ++ va = napi_alloc_frag(rxq->alloc_size); ++ else ++ va = netdev_alloc_frag(rxq->alloc_size); ++ ++ if (!va) ++ return NULL; + } else { + page = dev_alloc_page(); + if (!page) +@@ -1309,7 +1318,7 @@ static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, + va = page_to_virt(page); + } + +- *da = dma_map_single(dev, va + XDP_PACKET_HEADROOM, rxq->datasize, ++ *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, + DMA_FROM_DEVICE); + + if (dma_mapping_error(dev, *da)) { +@@ -1732,7 +1741,7 @@ static int mana_alloc_rx_wqe(struct mana_port_context *apc, + u32 buf_idx; + int ret; + +- WARN_ON(rxq->datasize == 0 || rxq->datasize > PAGE_SIZE); ++ WARN_ON(rxq->datasize == 0); + + *rxq_size = 0; + *cq_size = 0; +@@ -1788,6 +1797,7 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, + struct gdma_dev *gd = apc->ac->gdma_dev; + struct mana_obj_spec wq_spec; + struct mana_obj_spec cq_spec; ++ unsigned int mtu = ndev->mtu; + struct gdma_queue_spec spec; + struct mana_cq *cq = NULL; + struct gdma_context *gc; +@@ -1807,7 +1817,15 @@ static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, + rxq->rxq_idx = rxq_idx; + rxq->rxobj = INVALID_MANA_HANDLE; + +- rxq->datasize = ALIGN(ETH_FRAME_LEN, 64); ++ rxq->datasize = ALIGN(mtu + ETH_HLEN, 64); ++ ++ if (mtu > MANA_XDP_MTU_MAX) { ++ rxq->alloc_size = mtu + MANA_RXBUF_PAD; ++ rxq->headroom = 0; ++ } else { ++ rxq->alloc_size = mtu + MANA_RXBUF_PAD + XDP_PACKET_HEADROOM; ++ rxq->headroom = XDP_PACKET_HEADROOM; ++ } + + err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); + if (err) +diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h +index da556246233e..42795849d68c 100644 +--- a/include/net/mana/mana.h ++++ b/include/net/mana/mana.h +@@ -291,6 +291,11 @@ struct mana_recv_buf_oob { + struct gdma_posted_wqe_info wqe_inf; + }; + ++#define MANA_RXBUF_PAD (SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) \ ++ + ETH_HLEN) ++ ++#define MANA_XDP_MTU_MAX (PAGE_SIZE - MANA_RXBUF_PAD - XDP_PACKET_HEADROOM) ++ + struct mana_rxq { + struct gdma_queue *gdma_rq; + /* Cache the gdma receive queue id */ +@@ -300,6 +305,8 @@ struct mana_rxq { + u32 rxq_idx; + + u32 datasize; ++ u32 alloc_size; ++ u32 headroom; + + mana_handle_t rxobj; + +-- +2.40.1 + |