Hi Lorenzo, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Lorenzo-Bianconi/mvneta-introduc... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/3652b59c1a912ad4f2d609e074eeb332f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Lorenzo-Bianconi/mvneta-introduce-XDP-multi-buffer-support/20210408-205429 git checkout 3652b59c1a912ad4f2d609e074eeb332f44ba4d7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/net/ethernet/freescale/enetc/enetc.c: In function 'enetc_xdp_frame_to_xdp_tx_swbd': 888 | shinfo = xdp_get_shared_info_from_frame(xdp_frame); | ^ drivers/net/ethernet/freescale/enetc/enetc.c: In function 'enetc_map_rx_buff_to_xdp': drivers/net/ethernet/freescale/enetc/enetc.c:975:9: error: assignment to 'struct skb_shared_info *' from incompatible pointer type 'struct xdp_shared_info *' [-Werror=incompatible-pointer-types] 975 | shinfo = xdp_get_shared_info_from_buff(xdp_buff); | ^ drivers/net/ethernet/freescale/enetc/enetc.c: In function 'enetc_add_rx_buff_to_xdp': 982 | struct skb_shared_info *shinfo = xdp_get_shared_info_from_buff(xdp_buff); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +888 drivers/net/ethernet/freescale/enetc/enetc.c 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 858 9d2b68cc108db2 Vladimir Oltean 2021-03-31 859 static int enetc_xdp_frame_to_xdp_tx_swbd(struct enetc_bdr *tx_ring, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 860 struct enetc_tx_swbd *xdp_tx_arr, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 861 struct xdp_frame *xdp_frame) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 862 { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 863 struct enetc_tx_swbd *xdp_tx_swbd = &xdp_tx_arr[0]; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 864 struct skb_shared_info *shinfo; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 865 void *data = xdp_frame->data; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 866 int len = xdp_frame->len; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 867 skb_frag_t *frag; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 868 dma_addr_t dma; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 869 unsigned int f; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 870 int n = 0; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 871 9d2b68cc108db2 Vladimir Oltean 2021-03-31 872 dma = dma_map_single(tx_ring->dev, data, len, DMA_TO_DEVICE); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 873 if (unlikely(dma_mapping_error(tx_ring->dev, dma))) { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 874 netdev_err(tx_ring->ndev, "DMA map error\n"); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 875 return -1; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 876 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 877 9d2b68cc108db2 Vladimir Oltean 2021-03-31 878 xdp_tx_swbd->dma = dma; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 879 xdp_tx_swbd->dir = DMA_TO_DEVICE; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 880 xdp_tx_swbd->len = len; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 881 xdp_tx_swbd->is_xdp_redirect = true; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 882 xdp_tx_swbd->is_eof = false; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 883 xdp_tx_swbd->xdp_frame = NULL; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 884 9d2b68cc108db2 Vladimir Oltean 2021-03-31 885 n++; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 886 xdp_tx_swbd = &xdp_tx_arr[n]; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 887 9d2b68cc108db2 Vladimir Oltean 2021-03-31 @888 shinfo = xdp_get_shared_info_from_frame(xdp_frame); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 889 9d2b68cc108db2 Vladimir Oltean 2021-03-31 890 for (f = 0, frag = &shinfo->frags[0]; f < shinfo->nr_frags; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 891 f++, frag++) { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 892 data = skb_frag_address(frag); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 893 len = skb_frag_size(frag); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 894 9d2b68cc108db2 Vladimir Oltean 2021-03-31 895 dma = dma_map_single(tx_ring->dev, data, len, DMA_TO_DEVICE); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 896 if (unlikely(dma_mapping_error(tx_ring->dev, dma))) { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 897 /* Undo the DMA mapping for all fragments */ 9d2b68cc108db2 Vladimir Oltean 2021-03-31 898 while (n-- >= 0) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 899 enetc_unmap_tx_buff(tx_ring, &xdp_tx_arr[n]); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 900 9d2b68cc108db2 Vladimir Oltean 2021-03-31 901 netdev_err(tx_ring->ndev, "DMA map error\n"); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 902 return -1; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 903 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 904 9d2b68cc108db2 Vladimir Oltean 2021-03-31 905 xdp_tx_swbd->dma = dma; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 906 xdp_tx_swbd->dir = DMA_TO_DEVICE; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 907 xdp_tx_swbd->len = len; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 908 xdp_tx_swbd->is_xdp_redirect = true; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 909 xdp_tx_swbd->is_eof = false; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 910 xdp_tx_swbd->xdp_frame = NULL; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 911 9d2b68cc108db2 Vladimir Oltean 2021-03-31 912 n++; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 913 xdp_tx_swbd = &xdp_tx_arr[n]; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 914 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 915 9d2b68cc108db2 Vladimir Oltean 2021-03-31 916 xdp_tx_arr[n - 1].is_eof = true; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 917 xdp_tx_arr[n - 1].xdp_frame = xdp_frame; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 918 9d2b68cc108db2 Vladimir Oltean 2021-03-31 919 return n; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 920 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 921 9d2b68cc108db2 Vladimir Oltean 2021-03-31 922 int enetc_xdp_xmit(struct net_device *ndev, int num_frames, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 923 struct xdp_frame **frames, u32 flags) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 924 { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 925 struct enetc_tx_swbd xdp_redirect_arr[ENETC_MAX_SKB_FRAGS] = {0}; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 926 struct enetc_ndev_priv *priv = netdev_priv(ndev); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 927 struct enetc_bdr *tx_ring; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 928 int xdp_tx_bd_cnt, i, k; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 929 int xdp_tx_frm_cnt = 0; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 930 9d2b68cc108db2 Vladimir Oltean 2021-03-31 931 tx_ring = priv->tx_ring[smp_processor_id()]; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 932 9d2b68cc108db2 Vladimir Oltean 2021-03-31 933 prefetchw(ENETC_TXBD(*tx_ring, tx_ring->next_to_use)); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 934 9d2b68cc108db2 Vladimir Oltean 2021-03-31 935 for (k = 0; k < num_frames; k++) { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 936 xdp_tx_bd_cnt = enetc_xdp_frame_to_xdp_tx_swbd(tx_ring, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 937 xdp_redirect_arr, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 938 frames[k]); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 939 if (unlikely(xdp_tx_bd_cnt < 0)) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 940 break; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 941 9d2b68cc108db2 Vladimir Oltean 2021-03-31 942 if (unlikely(!enetc_xdp_tx(tx_ring, xdp_redirect_arr, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 943 xdp_tx_bd_cnt))) { 9d2b68cc108db2 Vladimir Oltean 2021-03-31 944 for (i = 0; i < xdp_tx_bd_cnt; i++) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 945 enetc_unmap_tx_buff(tx_ring, 9d2b68cc108db2 Vladimir Oltean 2021-03-31 946 &xdp_redirect_arr[i]); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 947 tx_ring->stats.xdp_tx_drops++; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 948 break; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 949 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 950 9d2b68cc108db2 Vladimir Oltean 2021-03-31 951 xdp_tx_frm_cnt++; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 952 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 953 9d2b68cc108db2 Vladimir Oltean 2021-03-31 954 if (unlikely((flags & XDP_XMIT_FLUSH) || k != xdp_tx_frm_cnt)) 9d2b68cc108db2 Vladimir Oltean 2021-03-31 955 enetc_update_tx_ring_tail(tx_ring); 9d2b68cc108db2 Vladimir Oltean 2021-03-31 956 9d2b68cc108db2 Vladimir Oltean 2021-03-31 957 tx_ring->stats.xdp_tx += xdp_tx_frm_cnt; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 958 9d2b68cc108db2 Vladimir Oltean 2021-03-31 959 return xdp_tx_frm_cnt; 9d2b68cc108db2 Vladimir Oltean 2021-03-31 960 } 9d2b68cc108db2 Vladimir Oltean 2021-03-31 961 d1b15102dd16ad Vladimir Oltean 2021-03-31 962 static void enetc_map_rx_buff_to_xdp(struct enetc_bdr *rx_ring, int i, d1b15102dd16ad Vladimir Oltean 2021-03-31 963 struct xdp_buff *xdp_buff, u16 size) d1b15102dd16ad Vladimir Oltean 2021-03-31 964 { d1b15102dd16ad Vladimir Oltean 2021-03-31 965 struct enetc_rx_swbd *rx_swbd = enetc_get_rx_buff(rx_ring, i, size); d1b15102dd16ad Vladimir Oltean 2021-03-31 966 void *hard_start = page_address(rx_swbd->page) + rx_swbd->page_offset; d1b15102dd16ad Vladimir Oltean 2021-03-31 967 struct skb_shared_info *shinfo; d1b15102dd16ad Vladimir Oltean 2021-03-31 968 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 969 /* To be used for XDP_TX */ 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 970 rx_swbd->len = size; 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 971 d1b15102dd16ad Vladimir Oltean 2021-03-31 972 xdp_prepare_buff(xdp_buff, hard_start - rx_ring->buffer_offset, d1b15102dd16ad Vladimir Oltean 2021-03-31 973 rx_ring->buffer_offset, size, false); d1b15102dd16ad Vladimir Oltean 2021-03-31 974 d1b15102dd16ad Vladimir Oltean 2021-03-31 975 shinfo = xdp_get_shared_info_from_buff(xdp_buff); d1b15102dd16ad Vladimir Oltean 2021-03-31 976 shinfo->nr_frags = 0; d1b15102dd16ad Vladimir Oltean 2021-03-31 977 } d1b15102dd16ad Vladimir Oltean 2021-03-31 978 d1b15102dd16ad Vladimir Oltean 2021-03-31 979 static void enetc_add_rx_buff_to_xdp(struct enetc_bdr *rx_ring, int i, d1b15102dd16ad Vladimir Oltean 2021-03-31 980 u16 size, struct xdp_buff *xdp_buff) d1b15102dd16ad Vladimir Oltean 2021-03-31 981 { d1b15102dd16ad Vladimir Oltean 2021-03-31 @982 struct skb_shared_info *shinfo = xdp_get_shared_info_from_buff(xdp_buff); d1b15102dd16ad Vladimir Oltean 2021-03-31 983 struct enetc_rx_swbd *rx_swbd = enetc_get_rx_buff(rx_ring, i, size); d1b15102dd16ad Vladimir Oltean 2021-03-31 984 skb_frag_t *frag = &shinfo->frags[shinfo->nr_frags]; d1b15102dd16ad Vladimir Oltean 2021-03-31 985 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 986 /* To be used for XDP_TX */ 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 987 rx_swbd->len = size; 7ed2bc80074ed4 Vladimir Oltean 2021-03-31 988 d1b15102dd16ad Vladimir Oltean 2021-03-31 989 skb_frag_off_set(frag, rx_swbd->page_offset); d1b15102dd16ad Vladimir Oltean 2021-03-31 990 skb_frag_size_set(frag, size); d1b15102dd16ad Vladimir Oltean 2021-03-31 991 __skb_frag_set_page(frag, rx_swbd->page); d1b15102dd16ad Vladimir Oltean 2021-03-31 992 d1b15102dd16ad Vladimir Oltean 2021-03-31 993 shinfo->nr_frags++; d1b15102dd16ad Vladimir Oltean 2021-03-31 994 } d1b15102dd16ad Vladimir Oltean 2021-03-31 995 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org