Re: [PATCH 06/12] drm/i915: Populate ctx ID for periodic OA reports

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Hi Sourab,

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on next-20170731]
[cannot apply to v4.13-rc3]
[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/Sagar-Arun-Kamble/i915-perf-support-for-command-stream-based-OA-GPU-and-workload-metrics-capture/20170731-184412
base:   git://anongit.freedesktop.org/drm-intel for-linux-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)
   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
   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/mtd/nand/nand_base.c:2751: warning: Excess function parameter 'cached' description in 'nand_write_page'
   drivers/mtd/nand/nand_base.c:2751: warning: Excess function parameter 'cached' description in 'nand_write_page'
   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:553: warning: No description found for parameter 'debugfs_init'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_open_object'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_close_object'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'prime_handle_to_fd'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'prime_fd_to_handle'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_export'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_import'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_pin'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_unpin'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_res_obj'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_get_sg_table'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_import_sg_table'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_vmap'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_vunmap'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_prime_mmap'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'gem_vm_ops'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'major'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'minor'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'patchlevel'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'name'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'desc'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'date'
   include/drm/drm_drv.h:553: warning: No description found for parameter 'driver_features'
   drivers/gpu/drm/drm_modes.c:1623: warning: No description found for parameter 'display'
   drivers/gpu/drm/drm_modes.c:1623: warning: Excess function parameter 'connector' description in 'drm_mode_is_420_only'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_drv.h:2000: warning: No description found for parameter 'emit_sample_capture'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_buffer'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples_lock'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'poll_wq'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'pollin'
>> drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'last_ctx_id'
   drivers/gpu/drm/i915/i915_drv.h:2000: warning: No description found for parameter 'emit_sample_capture'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_buffer'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples_lock'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'poll_wq'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'pollin'
>> drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'last_ctx_id'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_drv.h:2000: warning: No description found for parameter 'emit_sample_capture'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_buffer'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'cs_samples_lock'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'poll_wq'
   drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'pollin'
>> drivers/gpu/drm/i915/i915_drv.h:2082: warning: No description found for parameter 'last_ctx_id'
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:688: warning: No description found for parameter 'last_ts'
   drivers/gpu/drm/i915/i915_perf.c:1: warning: no structured comments found
   drivers/gpu/drm/i915/i915_perf.c:689: warning: No description found for parameter 'last_ts'
   drivers/gpu/host1x/bus.c:50: warning: Excess function parameter 'driver' description in 'host1x_subdev_add'
   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:3470: 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:404: ERROR: Unknown target name: "gfp".
   include/drm/drm_modeset_helper_vtables.h:1182: WARNING: Bullet list ends without a blank line; unexpected unindent.
   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.
   Documentation/gpu/todo.rst:111: ERROR: Unknown target name: "drm_fb".
   sound/soc/soc-core.c:2703: ERROR: Unknown target name: "snd_soc_daifmt".
   sound/core/jack.c:312: ERROR: Unknown target name: "snd_jack_btn".
   Documentation/media/v4l-drivers/imx.rst:: WARNING: document isn't included in any toctree
   Documentation/virtual/kvm/vcpu-requests.rst:: WARNING: document isn't included in any toctree
   Documentation/dev-tools/kselftest.rst:15: WARNING: Could not lex literal_block as "c". Highlighting skipped.
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
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   Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
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   Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
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   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
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   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected

vim +/last_ctx_id +2082 drivers/gpu/drm/i915/i915_drv.h

eec688e1 Robert Bragg 2016-11-07  1925  
16d98b31 Robert Bragg 2016-12-07  1926  /**
16d98b31 Robert Bragg 2016-12-07  1927   * struct i915_perf_stream_ops - the OPs to support a specific stream type
16d98b31 Robert Bragg 2016-12-07  1928   */
eec688e1 Robert Bragg 2016-11-07  1929  struct i915_perf_stream_ops {
16d98b31 Robert Bragg 2016-12-07  1930  	/**
16d98b31 Robert Bragg 2016-12-07  1931  	 * @enable: Enables the collection of HW samples, either in response to
16d98b31 Robert Bragg 2016-12-07  1932  	 * `I915_PERF_IOCTL_ENABLE` or implicitly called when stream is opened
16d98b31 Robert Bragg 2016-12-07  1933  	 * without `I915_PERF_FLAG_DISABLED`.
eec688e1 Robert Bragg 2016-11-07  1934  	 */
eec688e1 Robert Bragg 2016-11-07  1935  	void (*enable)(struct i915_perf_stream *stream);
eec688e1 Robert Bragg 2016-11-07  1936  
16d98b31 Robert Bragg 2016-12-07  1937  	/**
16d98b31 Robert Bragg 2016-12-07  1938  	 * @disable: Disables the collection of HW samples, either in response
16d98b31 Robert Bragg 2016-12-07  1939  	 * to `I915_PERF_IOCTL_DISABLE` or implicitly called before destroying
16d98b31 Robert Bragg 2016-12-07  1940  	 * the stream.
eec688e1 Robert Bragg 2016-11-07  1941  	 */
eec688e1 Robert Bragg 2016-11-07  1942  	void (*disable)(struct i915_perf_stream *stream);
eec688e1 Robert Bragg 2016-11-07  1943  
16d98b31 Robert Bragg 2016-12-07  1944  	/**
16d98b31 Robert Bragg 2016-12-07  1945  	 * @poll_wait: Call poll_wait, passing a wait queue that will be woken
eec688e1 Robert Bragg 2016-11-07  1946  	 * once there is something ready to read() for the stream
eec688e1 Robert Bragg 2016-11-07  1947  	 */
eec688e1 Robert Bragg 2016-11-07  1948  	void (*poll_wait)(struct i915_perf_stream *stream,
eec688e1 Robert Bragg 2016-11-07  1949  			  struct file *file,
eec688e1 Robert Bragg 2016-11-07  1950  			  poll_table *wait);
eec688e1 Robert Bragg 2016-11-07  1951  
16d98b31 Robert Bragg 2016-12-07  1952  	/**
16d98b31 Robert Bragg 2016-12-07  1953  	 * @wait_unlocked: For handling a blocking read, wait until there is
16d98b31 Robert Bragg 2016-12-07  1954  	 * something to ready to read() for the stream. E.g. wait on the same
d7965152 Robert Bragg 2016-11-07  1955  	 * wait queue that would be passed to poll_wait().
eec688e1 Robert Bragg 2016-11-07  1956  	 */
eec688e1 Robert Bragg 2016-11-07  1957  	int (*wait_unlocked)(struct i915_perf_stream *stream);
eec688e1 Robert Bragg 2016-11-07  1958  
16d98b31 Robert Bragg 2016-12-07  1959  	/**
16d98b31 Robert Bragg 2016-12-07  1960  	 * @read: Copy buffered metrics as records to userspace
16d98b31 Robert Bragg 2016-12-07  1961  	 * **buf**: the userspace, destination buffer
16d98b31 Robert Bragg 2016-12-07  1962  	 * **count**: the number of bytes to copy, requested by userspace
16d98b31 Robert Bragg 2016-12-07  1963  	 * **offset**: zero at the start of the read, updated as the read
16d98b31 Robert Bragg 2016-12-07  1964  	 * proceeds, it represents how many bytes have been copied so far and
16d98b31 Robert Bragg 2016-12-07  1965  	 * the buffer offset for copying the next record.
eec688e1 Robert Bragg 2016-11-07  1966  	 *
16d98b31 Robert Bragg 2016-12-07  1967  	 * Copy as many buffered i915 perf samples and records for this stream
16d98b31 Robert Bragg 2016-12-07  1968  	 * to userspace as will fit in the given buffer.
eec688e1 Robert Bragg 2016-11-07  1969  	 *
16d98b31 Robert Bragg 2016-12-07  1970  	 * Only write complete records; returning -%ENOSPC if there isn't room
16d98b31 Robert Bragg 2016-12-07  1971  	 * for a complete record.
eec688e1 Robert Bragg 2016-11-07  1972  	 *
16d98b31 Robert Bragg 2016-12-07  1973  	 * Return any error condition that results in a short read such as
16d98b31 Robert Bragg 2016-12-07  1974  	 * -%ENOSPC or -%EFAULT, even though these may be squashed before
16d98b31 Robert Bragg 2016-12-07  1975  	 * returning to userspace.
eec688e1 Robert Bragg 2016-11-07  1976  	 */
eec688e1 Robert Bragg 2016-11-07  1977  	int (*read)(struct i915_perf_stream *stream,
eec688e1 Robert Bragg 2016-11-07  1978  		    char __user *buf,
eec688e1 Robert Bragg 2016-11-07  1979  		    size_t count,
eec688e1 Robert Bragg 2016-11-07  1980  		    size_t *offset);
eec688e1 Robert Bragg 2016-11-07  1981  
16d98b31 Robert Bragg 2016-12-07  1982  	/**
16d98b31 Robert Bragg 2016-12-07  1983  	 * @destroy: Cleanup any stream specific resources.
eec688e1 Robert Bragg 2016-11-07  1984  	 *
eec688e1 Robert Bragg 2016-11-07  1985  	 * The stream will always be disabled before this is called.
eec688e1 Robert Bragg 2016-11-07  1986  	 */
eec688e1 Robert Bragg 2016-11-07  1987  	void (*destroy)(struct i915_perf_stream *stream);
b0aca6b4 Sourab Gupta 2017-07-31  1988  
b0aca6b4 Sourab Gupta 2017-07-31  1989  	/*
b0aca6b4 Sourab Gupta 2017-07-31  1990  	 * @emit_sample_capture: Emit the commands in the command streamer
b0aca6b4 Sourab Gupta 2017-07-31  1991  	 * for a particular gpu engine.
b0aca6b4 Sourab Gupta 2017-07-31  1992  	 *
b0aca6b4 Sourab Gupta 2017-07-31  1993  	 * The commands are inserted to capture the perf sample data at
b0aca6b4 Sourab Gupta 2017-07-31  1994  	 * specific points during workload execution, such as before and after
b0aca6b4 Sourab Gupta 2017-07-31  1995  	 * the batch buffer.
b0aca6b4 Sourab Gupta 2017-07-31  1996  	 */
b0aca6b4 Sourab Gupta 2017-07-31  1997  	void (*emit_sample_capture)(struct i915_perf_stream *stream,
b0aca6b4 Sourab Gupta 2017-07-31  1998  				    struct drm_i915_gem_request *request,
b0aca6b4 Sourab Gupta 2017-07-31  1999  				    bool preallocate);
b0aca6b4 Sourab Gupta 2017-07-31 @2000  };
b0aca6b4 Sourab Gupta 2017-07-31  2001  
b0aca6b4 Sourab Gupta 2017-07-31  2002  enum i915_perf_stream_state {
b0aca6b4 Sourab Gupta 2017-07-31  2003  	I915_PERF_STREAM_DISABLED,
b0aca6b4 Sourab Gupta 2017-07-31  2004  	I915_PERF_STREAM_ENABLE_IN_PROGRESS,
b0aca6b4 Sourab Gupta 2017-07-31  2005  	I915_PERF_STREAM_ENABLED,
eec688e1 Robert Bragg 2016-11-07  2006  };
eec688e1 Robert Bragg 2016-11-07  2007  
16d98b31 Robert Bragg 2016-12-07  2008  /**
16d98b31 Robert Bragg 2016-12-07  2009   * struct i915_perf_stream - state for a single open stream FD
16d98b31 Robert Bragg 2016-12-07  2010   */
eec688e1 Robert Bragg 2016-11-07  2011  struct i915_perf_stream {
16d98b31 Robert Bragg 2016-12-07  2012  	/**
16d98b31 Robert Bragg 2016-12-07  2013  	 * @dev_priv: i915 drm device
16d98b31 Robert Bragg 2016-12-07  2014  	 */
eec688e1 Robert Bragg 2016-11-07  2015  	struct drm_i915_private *dev_priv;
eec688e1 Robert Bragg 2016-11-07  2016  
16d98b31 Robert Bragg 2016-12-07  2017  	/**
b0aca6b4 Sourab Gupta 2017-07-31  2018  	 * @engine: Engine to which this stream corresponds.
16d98b31 Robert Bragg 2016-12-07  2019  	 */
b0aca6b4 Sourab Gupta 2017-07-31  2020  	struct intel_engine_cs *engine;
eec688e1 Robert Bragg 2016-11-07  2021  
16d98b31 Robert Bragg 2016-12-07  2022  	/**
16d98b31 Robert Bragg 2016-12-07  2023  	 * @sample_flags: Flags representing the `DRM_I915_PERF_PROP_SAMPLE_*`
16d98b31 Robert Bragg 2016-12-07  2024  	 * properties given when opening a stream, representing the contents
16d98b31 Robert Bragg 2016-12-07  2025  	 * of a single sample as read() by userspace.
16d98b31 Robert Bragg 2016-12-07  2026  	 */
eec688e1 Robert Bragg 2016-11-07  2027  	u32 sample_flags;
16d98b31 Robert Bragg 2016-12-07  2028  
16d98b31 Robert Bragg 2016-12-07  2029  	/**
16d98b31 Robert Bragg 2016-12-07  2030  	 * @sample_size: Considering the configured contents of a sample
16d98b31 Robert Bragg 2016-12-07  2031  	 * combined with the required header size, this is the total size
16d98b31 Robert Bragg 2016-12-07  2032  	 * of a single sample record.
16d98b31 Robert Bragg 2016-12-07  2033  	 */
d7965152 Robert Bragg 2016-11-07  2034  	int sample_size;
eec688e1 Robert Bragg 2016-11-07  2035  
16d98b31 Robert Bragg 2016-12-07  2036  	/**
16d98b31 Robert Bragg 2016-12-07  2037  	 * @ctx: %NULL if measuring system-wide across all contexts or a
16d98b31 Robert Bragg 2016-12-07  2038  	 * specific context that is being monitored.
16d98b31 Robert Bragg 2016-12-07  2039  	 */
eec688e1 Robert Bragg 2016-11-07  2040  	struct i915_gem_context *ctx;
16d98b31 Robert Bragg 2016-12-07  2041  
16d98b31 Robert Bragg 2016-12-07  2042  	/**
b0aca6b4 Sourab Gupta 2017-07-31  2043  	 * @state: Current stream state, which can be either disabled, enabled,
b0aca6b4 Sourab Gupta 2017-07-31  2044  	 * or enable_in_progress, while considering whether the stream was
b0aca6b4 Sourab Gupta 2017-07-31  2045  	 * opened in a disabled state and based on `I915_PERF_IOCTL_ENABLE` and
b0aca6b4 Sourab Gupta 2017-07-31  2046  	 * `I915_PERF_IOCTL_DISABLE` calls.
16d98b31 Robert Bragg 2016-12-07  2047  	 */
b0aca6b4 Sourab Gupta 2017-07-31  2048  	enum i915_perf_stream_state state;
b0aca6b4 Sourab Gupta 2017-07-31  2049  
b0aca6b4 Sourab Gupta 2017-07-31  2050  	/**
b0aca6b4 Sourab Gupta 2017-07-31  2051  	 * @cs_mode: Whether command stream based perf sample collection is
b0aca6b4 Sourab Gupta 2017-07-31  2052  	 * enabled for this stream
b0aca6b4 Sourab Gupta 2017-07-31  2053  	 */
b0aca6b4 Sourab Gupta 2017-07-31  2054  	bool cs_mode;
b0aca6b4 Sourab Gupta 2017-07-31  2055  
b0aca6b4 Sourab Gupta 2017-07-31  2056  	/**
b0aca6b4 Sourab Gupta 2017-07-31  2057  	 * @using_oa: Whether OA unit is in use for this particular stream
b0aca6b4 Sourab Gupta 2017-07-31  2058  	 */
b0aca6b4 Sourab Gupta 2017-07-31  2059  	bool using_oa;
eec688e1 Robert Bragg 2016-11-07  2060  
16d98b31 Robert Bragg 2016-12-07  2061  	/**
16d98b31 Robert Bragg 2016-12-07  2062  	 * @ops: The callbacks providing the implementation of this specific
16d98b31 Robert Bragg 2016-12-07  2063  	 * type of configured stream.
16d98b31 Robert Bragg 2016-12-07  2064  	 */
d7965152 Robert Bragg 2016-11-07  2065  	const struct i915_perf_stream_ops *ops;
b0aca6b4 Sourab Gupta 2017-07-31  2066  
b0aca6b4 Sourab Gupta 2017-07-31  2067  	/* Command stream based perf data buffer */
b0aca6b4 Sourab Gupta 2017-07-31  2068  	struct {
b0aca6b4 Sourab Gupta 2017-07-31  2069  		struct i915_vma *vma;
b0aca6b4 Sourab Gupta 2017-07-31  2070  		u8 *vaddr;
71fd8fc0 Sourab Gupta 2017-07-31  2071  #define I915_PERF_CMD_STREAM_BUF_STATUS_OVERFLOW (1<<0)
71fd8fc0 Sourab Gupta 2017-07-31  2072  		u32 status;
b0aca6b4 Sourab Gupta 2017-07-31  2073  	} cs_buffer;
b0aca6b4 Sourab Gupta 2017-07-31  2074  
b0aca6b4 Sourab Gupta 2017-07-31  2075  	struct list_head cs_samples;
b0aca6b4 Sourab Gupta 2017-07-31  2076  	spinlock_t cs_samples_lock;
b0aca6b4 Sourab Gupta 2017-07-31  2077  
b0aca6b4 Sourab Gupta 2017-07-31  2078  	wait_queue_head_t poll_wq;
b0aca6b4 Sourab Gupta 2017-07-31  2079  	bool pollin;
7405a923 Sourab Gupta 2017-07-31  2080  
7405a923 Sourab Gupta 2017-07-31  2081  	u32 last_ctx_id;
d7965152 Robert Bragg 2016-11-07 @2082  };
d7965152 Robert Bragg 2016-11-07  2083  

:::::: The code at line 2082 was first introduced by commit
:::::: d79651522e89c4ffa8992b48dfe449f0c583f809 drm/i915: Enable i915 perf stream for Haswell OA unit

:::::: TO: Robert Bragg <robert@xxxxxxxxxxxxx>
:::::: CC: Daniel Vetter <daniel.vetter@xxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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