Hi Yishai, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.6-rc6 next-20231017] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Yishai-Hadas/virtio-pci-Fix-common-config-map-for-modern-device/20231017-214450 base: linus/master patch link: https://lore.kernel.org/r/20231017134217.82497-7-yishaih%40nvidia.com patch subject: [PATCH V1 vfio 6/9] virtio-pci: Introduce APIs to execute legacy IO admin commands config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20231018/202310180437.jo2csM6u-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231018/202310180437.jo2csM6u-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310180437.jo2csM6u-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/virtio/virtio_pci_modern.c:731:5: warning: no previous prototype for 'virtio_pci_admin_list_query' [-Wmissing-prototypes] 731 | int virtio_pci_admin_list_query(struct pci_dev *pdev, u8 *buf, int buf_size) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/virtio/virtio_pci_modern.c:758:5: warning: no previous prototype for 'virtio_pci_admin_list_use' [-Wmissing-prototypes] 758 | int virtio_pci_admin_list_use(struct pci_dev *pdev, u8 *buf, int buf_size) | ^~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/virtio/virtio_pci_modern.c:786:5: warning: no previous prototype for 'virtio_pci_admin_legacy_io_write' [-Wmissing-prototypes] 786 | int virtio_pci_admin_legacy_io_write(struct pci_dev *pdev, u16 opcode, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/virtio/virtio_pci_modern.c:831:5: warning: no previous prototype for 'virtio_pci_admin_legacy_io_read' [-Wmissing-prototypes] 831 | int virtio_pci_admin_legacy_io_read(struct pci_dev *pdev, u16 opcode, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/virtio/virtio_pci_modern.c:877:5: warning: no previous prototype for 'virtio_pci_admin_legacy_io_notify_info' [-Wmissing-prototypes] 877 | int virtio_pci_admin_legacy_io_notify_info(struct pci_dev *pdev, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/virtio_pci_admin_list_query +731 drivers/virtio/virtio_pci_modern.c 721 722 /* 723 * virtio_pci_admin_list_query - Provides to driver list of commands 724 * supported for the PCI VF. 725 * @dev: VF pci_dev 726 * @buf: buffer to hold the returned list 727 * @buf_size: size of the given buffer 728 * 729 * Returns 0 on success, or negative on failure. 730 */ > 731 int virtio_pci_admin_list_query(struct pci_dev *pdev, u8 *buf, int buf_size) 732 { 733 struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev); 734 struct virtio_admin_cmd cmd = {}; 735 struct scatterlist result_sg; 736 737 if (!virtio_dev) 738 return -ENODEV; 739 740 sg_init_one(&result_sg, buf, buf_size); 741 cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_LIST_QUERY); 742 cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV); 743 cmd.result_sg = &result_sg; 744 745 return vp_modern_admin_cmd_exec(virtio_dev, &cmd); 746 } 747 EXPORT_SYMBOL_GPL(virtio_pci_admin_list_query); 748 749 /* 750 * virtio_pci_admin_list_use - Provides to device list of commands 751 * used for the PCI VF. 752 * @dev: VF pci_dev 753 * @buf: buffer which holds the list 754 * @buf_size: size of the given buffer 755 * 756 * Returns 0 on success, or negative on failure. 757 */ > 758 int virtio_pci_admin_list_use(struct pci_dev *pdev, u8 *buf, int buf_size) 759 { 760 struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev); 761 struct virtio_admin_cmd cmd = {}; 762 struct scatterlist data_sg; 763 764 if (!virtio_dev) 765 return -ENODEV; 766 767 sg_init_one(&data_sg, buf, buf_size); 768 cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_LIST_USE); 769 cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV); 770 cmd.data_sg = &data_sg; 771 772 return vp_modern_admin_cmd_exec(virtio_dev, &cmd); 773 } 774 EXPORT_SYMBOL_GPL(virtio_pci_admin_list_use); 775 776 /* 777 * virtio_pci_admin_legacy_io_write - Write legacy registers of a member device 778 * @dev: VF pci_dev 779 * @opcode: op code of the io write command 780 * @offset: starting byte offset within the registers to write to 781 * @size: size of the data to write 782 * @buf: buffer which holds the data 783 * 784 * Returns 0 on success, or negative on failure. 785 */ > 786 int virtio_pci_admin_legacy_io_write(struct pci_dev *pdev, u16 opcode, 787 u8 offset, u8 size, u8 *buf) 788 { 789 struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev); 790 struct virtio_admin_cmd_legacy_wr_data *data; 791 struct virtio_admin_cmd cmd = {}; 792 struct scatterlist data_sg; 793 int vf_id; 794 int ret; 795 796 if (!virtio_dev) 797 return -ENODEV; 798 799 vf_id = pci_iov_vf_id(pdev); 800 if (vf_id < 0) 801 return vf_id; 802 803 data = kzalloc(sizeof(*data) + size, GFP_KERNEL); 804 if (!data) 805 return -ENOMEM; 806 807 data->offset = offset; 808 memcpy(data->registers, buf, size); 809 sg_init_one(&data_sg, data, sizeof(*data) + size); 810 cmd.opcode = cpu_to_le16(opcode); 811 cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV); 812 cmd.group_member_id = cpu_to_le64(vf_id + 1); 813 cmd.data_sg = &data_sg; 814 ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd); 815 816 kfree(data); 817 return ret; 818 } 819 EXPORT_SYMBOL_GPL(virtio_pci_admin_legacy_io_write); 820 821 /* 822 * virtio_pci_admin_legacy_io_read - Read legacy registers of a member device 823 * @dev: VF pci_dev 824 * @opcode: op code of the io read command 825 * @offset: starting byte offset within the registers to read from 826 * @size: size of the data to be read 827 * @buf: buffer to hold the returned data 828 * 829 * Returns 0 on success, or negative on failure. 830 */ > 831 int virtio_pci_admin_legacy_io_read(struct pci_dev *pdev, u16 opcode, 832 u8 offset, u8 size, u8 *buf) 833 { 834 struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev); 835 struct virtio_admin_cmd_legacy_rd_data *data; 836 struct scatterlist data_sg, result_sg; 837 struct virtio_admin_cmd cmd = {}; 838 int vf_id; 839 int ret; 840 841 if (!virtio_dev) 842 return -ENODEV; 843 844 vf_id = pci_iov_vf_id(pdev); 845 if (vf_id < 0) 846 return vf_id; 847 848 data = kzalloc(sizeof(*data), GFP_KERNEL); 849 if (!data) 850 return -ENOMEM; 851 852 data->offset = offset; 853 sg_init_one(&data_sg, data, sizeof(*data)); 854 sg_init_one(&result_sg, buf, size); 855 cmd.opcode = cpu_to_le16(opcode); 856 cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV); 857 cmd.group_member_id = cpu_to_le64(vf_id + 1); 858 cmd.data_sg = &data_sg; 859 cmd.result_sg = &result_sg; 860 ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd); 861 862 kfree(data); 863 return ret; 864 } 865 EXPORT_SYMBOL_GPL(virtio_pci_admin_legacy_io_read); 866 867 /* 868 * virtio_pci_admin_legacy_io_notify_info - Read the queue notification 869 * information for legacy interface 870 * @dev: VF pci_dev 871 * @req_bar_flags: requested bar flags 872 * @bar: on output the BAR number of the member device 873 * @bar_offset: on output the offset within bar 874 * 875 * Returns 0 on success, or negative on failure. 876 */ > 877 int virtio_pci_admin_legacy_io_notify_info(struct pci_dev *pdev, 878 u8 req_bar_flags, u8 *bar, 879 u64 *bar_offset) 880 { 881 struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev); 882 struct virtio_admin_cmd_notify_info_result *result; 883 struct virtio_admin_cmd cmd = {}; 884 struct scatterlist result_sg; 885 int vf_id; 886 int ret; 887 888 if (!virtio_dev) 889 return -ENODEV; 890 891 vf_id = pci_iov_vf_id(pdev); 892 if (vf_id < 0) 893 return vf_id; 894 895 result = kzalloc(sizeof(*result), GFP_KERNEL); 896 if (!result) 897 return -ENOMEM; 898 899 sg_init_one(&result_sg, result, sizeof(*result)); 900 cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_LEGACY_NOTIFY_INFO); 901 cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV); 902 cmd.group_member_id = cpu_to_le64(vf_id + 1); 903 cmd.result_sg = &result_sg; 904 ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd); 905 if (!ret) { 906 struct virtio_admin_cmd_notify_info_data *entry; 907 int i; 908 909 ret = -ENOENT; 910 for (i = 0; i < VIRTIO_ADMIN_CMD_MAX_NOTIFY_INFO; i++) { 911 entry = &result->entries[i]; 912 if (entry->flags == VIRTIO_ADMIN_CMD_NOTIFY_INFO_FLAGS_END) 913 break; 914 if (entry->flags != req_bar_flags) 915 continue; 916 *bar = entry->bar; 917 *bar_offset = le64_to_cpu(entry->offset); 918 ret = 0; 919 break; 920 } 921 } 922 923 kfree(result); 924 return ret; 925 } 926 EXPORT_SYMBOL_GPL(virtio_pci_admin_legacy_io_notify_info); 927 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
