[PATCH v8 2/6] PCI: add resizeable BAR infrastructure v5
kbuild test robot
lkp at intel.com
Tue Jul 11 12:39:16 UTC 2017
Hi Christian,
[auto build test WARNING on pci/next]
[also build test WARNING on v4.12 next-20170710]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Christian-K-nig/PCI-add-a-define-for-the-PCI-resource-type-mask-v2/20170711-104904
base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
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)
arch/x86/include/asm/uaccess_32.h:1: warning: no structured comments found
include/linux/init.h:1: warning: no structured comments found
include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_major' description in 'fsl_mc_device_id'
include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_minor' description in 'fsl_mc_device_id'
kernel/sched/core.c:2080: warning: No description found for parameter 'rf'
kernel/sched/core.c:2080: warning: Excess function parameter 'cookie' description in 'try_to_wake_up_local'
include/linux/wait.h:555: warning: No description found for parameter 'wq'
include/linux/wait.h:555: warning: Excess function parameter 'wq_head' description in 'wait_event_interruptible_hrtimeout'
include/linux/wait.h:759: warning: No description found for parameter 'wq_head'
include/linux/wait.h:759: warning: Excess function parameter 'wq' description in 'wait_event_killable'
include/linux/kthread.h:26: warning: Excess function parameter '...' description in 'kthread_create'
kernel/sys.c:1: warning: no structured comments found
Error: Cannot open file kernel/rcu/srcu.c
Error: Cannot open file kernel/rcu/srcu.c
WARNING: kernel-doc 'scripts/kernel-doc -rst -enable-lineno -export kernel/rcu/srcu.c' failed with return code 2
include/linux/device.h:968: warning: No description found for parameter 'dma_ops'
drivers/dma-buf/seqno-fence.c:1: warning: no structured comments found
include/linux/iio/iio.h:603: warning: No description found for parameter 'trig_readonly'
include/linux/iio/trigger.h:151: warning: No description found for parameter 'indio_dev'
include/linux/iio/trigger.h:151: warning: No description found for parameter 'trig'
include/linux/device.h:969: warning: No description found for parameter 'dma_ops'
drivers/ata/libata-eh.c:1449: warning: No description found for parameter 'link'
drivers/ata/libata-eh.c:1449: warning: Excess function parameter 'ap' description in 'ata_eh_done'
drivers/ata/libata-eh.c:1590: warning: No description found for parameter 'qc'
drivers/ata/libata-eh.c:1590: warning: Excess function parameter 'dev' description in 'ata_eh_request_sense'
>> drivers/pci/pci.c:2970: warning: No description found for parameter 'pdev'
>> drivers/pci/pci.c:2970: warning: Excess function parameter 'dev' description in 'pci_rbar_find_pos'
drivers/pci/pci.c:3004: warning: No description found for parameter 'pdev'
>> drivers/pci/pci.c:3004: warning: Excess function parameter 'dev' description in 'pci_rbar_get_possible_sizes'
drivers/pci/pci.c:3026: warning: No description found for parameter 'pdev'
>> drivers/pci/pci.c:3026: warning: Excess function parameter 'dev' description in 'pci_rbar_get_current_size'
drivers/pci/pci.c:3049: warning: No description found for parameter 'pdev'
>> drivers/pci/pci.c:3049: warning: Excess function parameter 'dev' description in 'pci_rbar_set_size'
arch/s390/include/asm/cmb.h:1: warning: no structured comments found
drivers/scsi/scsi_lib.c:1116: warning: No description found for parameter 'rq'
drivers/scsi/constants.c:1: warning: no structured comments found
include/linux/usb/gadget.h:230: warning: No description found for parameter 'claimed'
include/linux/usb/gadget.h:230: warning: No description found for parameter 'enabled'
include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_altset_not_supp'
include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_stall_not_supp'
include/linux/usb/gadget.h:412: warning: No description found for parameter 'quirk_zlp_not_supp'
fs/inode.c:1666: 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:537: warning: No description found for parameter 'set_busid'
include/drm/drm_drv.h:537: warning: No description found for parameter 'debugfs_init'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_open_object'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_close_object'
include/drm/drm_drv.h:537: warning: No description found for parameter 'prime_handle_to_fd'
include/drm/drm_drv.h:537: warning: No description found for parameter 'prime_fd_to_handle'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_export'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_import'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_pin'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_unpin'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_res_obj'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_get_sg_table'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_import_sg_table'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_vmap'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_vunmap'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_mmap'
include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_vm_ops'
include/drm/drm_drv.h:537: warning: No description found for parameter 'major'
include/drm/drm_drv.h:537: warning: No description found for parameter 'minor'
include/drm/drm_drv.h:537: warning: No description found for parameter 'patchlevel'
include/drm/drm_drv.h:537: warning: No description found for parameter 'name'
include/drm/drm_drv.h:537: warning: No description found for parameter 'desc'
include/drm/drm_drv.h:537: warning: No description found for parameter 'date'
include/drm/drm_drv.h:537: warning: No description found for parameter 'driver_features'
include/drm/drm_drv.h:537: warning: No description found for parameter 'ioctls'
include/drm/drm_drv.h:537: warning: No description found for parameter 'num_ioctls'
include/drm/drm_drv.h:537: warning: No description found for parameter 'fops'
include/drm/drm_color_mgmt.h:1: warning: no structured comments found
drivers/gpu/drm/drm_syncobj.c:341: warning: Excess function parameter 'dev' description in 'drm_syncobj_open'
drivers/gpu/drm/drm_syncobj.c:366: warning: Excess function parameter 'dev' description in 'drm_syncobj_release'
include/drm/drm_syncobj.h:1: warning: no structured comments found
drivers/gpu/drm/drm_syncobj.c:342: warning: Excess function parameter 'dev' description in 'drm_syncobj_open'
drivers/gpu/drm/drm_syncobj.c:367: warning: Excess function parameter 'dev' description in 'drm_syncobj_release'
drivers/gpu/host1x/bus.c:50: warning: Excess function parameter 'driver' description in 'host1x_subdev_add'
include/net/sock.h:479: warning: No description found for parameter 'sk_tsq_flags'
include/net/sock.h:479: warning: No description found for parameter '__sk_flags_offset'
include/net/sock.h:479: warning: No description found for parameter 'sk_uid'
Documentation/doc-guide/sphinx.rst:121: ERROR: Unknown target name: "sphinx c domain".
kernel/sched/fair.c:7584: WARNING: Inline emphasis start-string without end-string.
kernel/time/timer.c:1200: ERROR: Unexpected indentation.
kernel/time/timer.c:1202: ERROR: Unexpected indentation.
kernel/time/timer.c:1203: WARNING: Block quote ends without a blank line; unexpected unindent.
include/linux/wait.h:108: WARNING: Block quote ends without a blank line; unexpected unindent.
include/linux/wait.h:111: ERROR: Unexpected indentation.
include/linux/wait.h:113: WARNING: Block quote ends without a blank line; unexpected unindent.
kernel/time/hrtimer.c:991: WARNING: Block quote ends without a blank line; unexpected unindent.
kernel/signal.c:323: WARNING: Inline literal start-string without end-string.
kernel/rcu/tree.c:3187: ERROR: Unexpected indentation.
kernel/rcu/tree.c:3214: ERROR: Unexpected indentation.
kernel/rcu/tree.c:3215: WARNING: Bullet list ends without a blank line; unexpected unindent.
include/linux/iio/iio.h:219: ERROR: Unexpected indentation.
include/linux/iio/iio.h:220: WARNING: Block quote ends without a blank line; unexpected unindent.
include/linux/iio/iio.h:226: WARNING: Definition list ends without a blank line; unexpected unindent.
drivers/iio/industrialio-core.c:633: ERROR: Unknown target name: "iio_val".
drivers/iio/industrialio-core.c:640: ERROR: Unknown target name: "iio_val".
drivers/ata/libata-core.c:5906: ERROR: Unknown target name: "hw".
drivers/message/fusion/mptbase.c:5051: WARNING: Definition list ends without a blank line; unexpected unindent.
drivers/tty/serial/serial_core.c:1897: WARNING: Definition list ends without a blank line; unexpected unindent.
drivers/pci/pci.c:3574: ERROR: Unexpected indentation.
include/linux/regulator/driver.h:271: ERROR: Unknown target name: "regulator_regmap_x_voltage".
include/linux/spi/spi.h:373: ERROR: Unexpected indentation.
drivers/w1/w1_io.c:196: WARNING: Definition list ends without a blank line; unexpected unindent.
block/bio.c:407: ERROR: Unknown target name: "gfp".
drivers/gpu/drm/drm_scdc_helper.c:203: ERROR: Unexpected indentation.
drivers/gpu/drm/drm_scdc_helper.c:204: WARNING: Block quote ends without a blank line; unexpected unindent.
drivers/gpu/drm/drm_ioctl.c:702: WARNING: Definition list ends without a blank line; unexpected unindent.
Documentation/gpu/todo.rst:111: ERROR: Unknown target name: "drm_fb".
vim +/pdev +2970 drivers/pci/pci.c
2958
2959 /**
2960 * pci_rbar_find_pos - find position of resize ctrl reg for BAR
2961 * @dev: PCI device
2962 * @bar: BAR to find
2963 *
2964 * Helper to find the postion of the ctrl register for a BAR.
2965 * Returns -ENOTSUPP of resizeable BARs are not supported at all.
2966 * Returns -ENOENT if not ctrl register for the BAR could be found.
2967 */
2968 static int pci_rbar_find_pos(struct pci_dev *pdev, int bar)
2969 {
> 2970 unsigned int pos, nbars;
2971 unsigned int i;
2972 u32 ctrl;
2973
2974 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR);
2975 if (!pos)
2976 return -ENOTSUPP;
2977
2978 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
2979 nbars = (ctrl & PCI_REBAR_CTRL_NBAR_MASK) >> PCI_REBAR_CTRL_NBAR_SHIFT;
2980
2981 for (i = 0; i < nbars; ++i, pos += 8) {
2982 int bar_idx;
2983
2984 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
2985 bar_idx = (ctrl & PCI_REBAR_CTRL_BAR_IDX_MASK) >>
2986 PCI_REBAR_CTRL_BAR_IDX_SHIFT;
2987 if (bar_idx == bar)
2988 return pos;
2989 }
2990
2991 return -ENOENT;
2992 }
2993
2994 /**
2995 * pci_rbar_get_possible_sizes - get possible sizes for BAR
2996 * @dev: PCI device
2997 * @bar: BAR to query
2998 *
2999 * Get the possible sizes of a resizeable BAR as bitmask defined in the spec
3000 * (bit 0=1MB, bit 19=512GB). Returns 0 if BAR isn't resizeable.
3001 */
3002 u32 pci_rbar_get_possible_sizes(struct pci_dev *pdev, int bar)
3003 {
> 3004 u32 cap;
3005 int pos;
3006
3007 pos = pci_rbar_find_pos(pdev, bar);
3008 if (pos < 0)
3009 return 0;
3010
3011 pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap);
3012 return (cap & PCI_REBAR_CTRL_SIZES_MASK) >>
3013 PCI_REBAR_CTRL_SIZES_SHIFT;
3014 }
3015
3016 /**
3017 * pci_rbar_get_current_size - get the current size of a BAR
3018 * @dev: PCI device
3019 * @bar: BAR to set size to
3020 *
3021 * Read the size of a BAR from the resizeable BAR config.
3022 * Returns size if found or negative error code.
3023 */
3024 int pci_rbar_get_current_size(struct pci_dev *pdev, int bar)
3025 {
> 3026 u32 ctrl;
3027 int pos;
3028
3029 pos = pci_rbar_find_pos(pdev, bar);
3030 if (pos < 0)
3031 return pos;
3032
3033 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
3034 return (ctrl & PCI_REBAR_CTRL_BAR_SIZE_MASK) >>
3035 PCI_REBAR_CTRL_BAR_SIZE_SHIFT;
3036 }
3037
3038 /**
3039 * pci_rbar_set_size - set a new size for a BAR
3040 * @dev: PCI device
3041 * @bar: BAR to set size to
3042 * @size: new size as defined in the spec (0=1MB, 19=512GB)
3043 *
3044 * Set the new size of a BAR as defined in the spec.
3045 * Returns zero if resizing was successful, error code otherwise.
3046 */
3047 int pci_rbar_set_size(struct pci_dev *pdev, int bar, int size)
3048 {
> 3049 u32 ctrl;
3050 int pos;
3051
3052 pos = pci_rbar_find_pos(pdev, bar);
3053 if (pos < 0)
3054 return pos;
3055
3056 pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
3057 ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE_MASK;
3058 ctrl |= size << PCI_REBAR_CTRL_BAR_SIZE_SHIFT;
3059 pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
3060 return 0;
3061 }
3062
---
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