tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/resource head: ca6a28653cfce7ad50c241d61409ce99fecca19f commit: 23ef8ffd84db01266d5b4dea61319b94ae12364b [2/4] PCI: Add resizable BAR infrastructure reproduce: make htmldocs All warnings (new ones prefixed by >>): WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick (https://www.imagemagick.org) kernel/trace/blktrace.c:824: warning: No description found for parameter 'cgid' include/linux/sync_file.h:51: warning: No description found for parameter 'flags' drivers/gpio/gpiolib.c:593: warning: No description found for parameter '16' drivers/gpio/gpiolib.c:593: warning: Excess struct/union/enum/typedef member 'events' description in 'lineevent_state' >> drivers/pci/pci.c:2979: warning: No description found for parameter 'pdev' >> drivers/pci/pci.c:2979: warning: Excess function parameter 'dev' description in 'pci_rebar_find_pos' drivers/pci/pci.c:3012: warning: No description found for parameter 'pdev' >> drivers/pci/pci.c:3012: warning: Excess function parameter 'dev' description in 'pci_rebar_get_possible_sizes' drivers/pci/pci.c:3033: warning: No description found for parameter 'pdev' >> drivers/pci/pci.c:3033: warning: Excess function parameter 'dev' description in 'pci_rebar_get_current_size' drivers/pci/pci.c:3055: warning: No description found for parameter 'pdev' >> drivers/pci/pci.c:3055: warning: Excess function parameter 'dev' description in 'pci_rebar_set_size' include/linux/usb/gadget.h:232: warning: No description found for parameter 'claimed' include/linux/usb/gadget.h:232: warning: No description found for parameter 'enabled' include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_altset_not_supp' include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_stall_not_supp' include/linux/usb/gadget.h:414: warning: No description found for parameter 'quirk_zlp_not_supp' fs/inode.c:1680: warning: No description found for parameter 'rcu' include/linux/jbd2.h:443: warning: No description found for parameter 'i_transaction' include/linux/jbd2.h:443: warning: No description found for parameter 'i_next_transaction' include/linux/jbd2.h:443: warning: No description found for parameter 'i_list' include/linux/jbd2.h:443: warning: No description found for parameter 'i_vfs_inode' include/linux/jbd2.h:443: warning: No description found for parameter 'i_flags' include/linux/jbd2.h:497: warning: No description found for parameter 'h_rsv_handle' include/linux/jbd2.h:497: warning: No description found for parameter 'h_reserved' include/linux/jbd2.h:497: warning: No description found for parameter 'h_type' include/linux/jbd2.h:497: warning: No description found for parameter 'h_line_no' include/linux/jbd2.h:497: warning: No description found for parameter 'h_start_jiffies' include/linux/jbd2.h:497: warning: No description found for parameter 'h_requested_credits' include/linux/jbd2.h:497: warning: No description found for parameter 'saved_alloc_context' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chkpt_bhs' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_devname' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_average_commit_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_min_batch_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_max_batch_time' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_commit_callback' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_failed_commit' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_chksum_driver' include/linux/jbd2.h:1050: warning: No description found for parameter 'j_csum_seed' fs/jbd2/transaction.c:511: warning: No description found for parameter 'type' fs/jbd2/transaction.c:511: warning: No description found for parameter 'line_no' fs/jbd2/transaction.c:641: warning: No description found for parameter 'gfp_mask' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_pin' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_unpin' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_res_obj' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_get_sg_table' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_import_sg_table' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_vmap' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_vunmap' include/drm/drm_drv.h:594: warning: No description found for parameter 'gem_prime_mmap' include/drm/drm_mode_config.h:771: warning: No description found for parameter 'modifiers_property' include/drm/drm_mode_config.h:771: warning: Excess struct/union/enum/typedef member 'modifiers' description in 'drm_mode_config' include/drm/drm_plane.h:544: warning: No description found for parameter 'modifiers' include/drm/drm_plane.h:544: warning: No description found for parameter 'modifier_count' drivers/gpu/host1x/bus.c:50: warning: No description found for parameter 'driver' Documentation/core-api/kernel-api.rst:354: ERROR: Error in "kernel-doc" directive: unknown option: "external". vim +/pdev +2979 drivers/pci/pci.c 2967 2968 /** 2969 * pci_rebar_find_pos - find position of resize ctrl reg for BAR 2970 * @dev: PCI device 2971 * @bar: BAR to find 2972 * 2973 * Helper to find the position of the ctrl register for a BAR. 2974 * Returns -ENOTSUPP if resizable BARs are not supported at all. 2975 * Returns -ENOENT if no ctrl register for the BAR could be found. 2976 */ 2977 static int pci_rebar_find_pos(struct pci_dev *pdev, int bar) 2978 { > 2979 unsigned int pos, nbars, i; 2980 u32 ctrl; 2981 2982 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR); 2983 if (!pos) 2984 return -ENOTSUPP; 2985 2986 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl); 2987 nbars = (ctrl & PCI_REBAR_CTRL_NBAR_MASK) >> 2988 PCI_REBAR_CTRL_NBAR_SHIFT; 2989 2990 for (i = 0; i < nbars; i++, pos += 8) { 2991 int bar_idx; 2992 2993 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl); 2994 bar_idx = ctrl & PCI_REBAR_CTRL_BAR_IDX; 2995 if (bar_idx == bar) 2996 return pos; 2997 } 2998 2999 return -ENOENT; 3000 } 3001 3002 /** 3003 * pci_rebar_get_possible_sizes - get possible sizes for BAR 3004 * @dev: PCI device 3005 * @bar: BAR to query 3006 * 3007 * Get the possible sizes of a resizable BAR as bitmask defined in the spec 3008 * (bit 0=1MB, bit 19=512GB). Returns 0 if BAR isn't resizable. 3009 */ 3010 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar) 3011 { > 3012 int pos; 3013 u32 cap; 3014 3015 pos = pci_rebar_find_pos(pdev, bar); 3016 if (pos < 0) 3017 return 0; 3018 3019 pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap); 3020 return (cap & PCI_REBAR_CAP_SIZES) >> 4; 3021 } 3022 3023 /** 3024 * pci_rebar_get_current_size - get the current size of a BAR 3025 * @dev: PCI device 3026 * @bar: BAR to set size to 3027 * 3028 * Read the size of a BAR from the resizable BAR config. 3029 * Returns size if found or negative error code. 3030 */ 3031 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar) 3032 { > 3033 int pos; 3034 u32 ctrl; 3035 3036 pos = pci_rebar_find_pos(pdev, bar); 3037 if (pos < 0) 3038 return pos; 3039 3040 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl); 3041 return (ctrl & PCI_REBAR_CTRL_BAR_SIZE) >> 8; 3042 } 3043 3044 /** 3045 * pci_rebar_set_size - set a new size for a BAR 3046 * @dev: PCI device 3047 * @bar: BAR to set size to 3048 * @size: new size as defined in the spec (0=1MB, 19=512GB) 3049 * 3050 * Set the new size of a BAR as defined in the spec. 3051 * Returns zero if resizing was successful, error code otherwise. 3052 */ 3053 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size) 3054 { > 3055 int pos; 3056 u32 ctrl; 3057 3058 pos = pci_rebar_find_pos(pdev, bar); 3059 if (pos < 0) 3060 return pos; 3061 3062 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl); 3063 ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE; 3064 ctrl |= size << 8; 3065 pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl); 3066 return 0; 3067 } 3068 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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