Re: [PATCH v2] drm/i915: Drop i915_gem_obj_is_pinned() from set-cache-level

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Hi Chris,

[auto build test WARNING on next-20151009 -- if it's inappropriate base, please ignore]

reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   include/drm/drm_crtc.h:1162: warning: No description found for parameter 'dirty_info_property'
   include/drm/drm_crtc.h:1162: warning: No description found for parameter 'suggested_x_property'
   include/drm/drm_crtc.h:1162: warning: No description found for parameter 'suggested_y_property'
   include/drm/drm_crtc.h:1162: warning: No description found for parameter 'allow_fb_modifiers'
   include/drm/drm_fb_helper.h:148: warning: No description found for parameter 'connector_info'
   include/drm/drm_dp_helper.h:713: warning: No description found for parameter 'i2c_nack_count'
   include/drm/drm_dp_helper.h:713: warning: No description found for parameter 'i2c_defer_count'
   drivers/gpu/drm/drm_dp_mst_topology.c:2226: warning: No description found for parameter 'connector'
   include/drm/drm_dp_mst_helper.h:97: warning: No description found for parameter 'cached_edid'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'max_dpcd_transaction_bytes'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'sink_count'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'total_slots'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'avail_slots'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'total_pbn'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'qlock'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_msg_downq'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_msg_upq'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_down_in_progress'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_up_in_progress'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'payload_lock'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'proposed_vcpis'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'payloads'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'payload_mask'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'vcpi_mask'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_waitq'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'work'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'tx_work'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'destroy_connector_list'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'destroy_connector_lock'
   include/drm/drm_dp_mst_helper.h:471: warning: No description found for parameter 'destroy_connector_work'
   drivers/gpu/drm/drm_dp_mst_topology.c:2226: warning: No description found for parameter 'connector'
   drivers/gpu/drm/drm_irq.c:173: warning: No description found for parameter 'flags'
   include/drm/drmP.h:164: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:180: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:198: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:238: warning: No description found for parameter 'dev'
   include/drm/drmP.h:238: warning: No description found for parameter 'data'
   include/drm/drmP.h:238: warning: No description found for parameter 'file_priv'
   include/drm/drmP.h:271: warning: No description found for parameter 'ioctl'
   include/drm/drmP.h:271: warning: No description found for parameter '_func'
   include/drm/drmP.h:271: warning: No description found for parameter '_flags'
   include/drm/drmP.h:344: warning: cannot understand function prototype: 'struct drm_lock_data '
   include/drm/drmP.h:397: warning: cannot understand function prototype: 'struct drm_driver '
   include/drm/drmP.h:647: warning: cannot understand function prototype: 'struct drm_info_list '
   include/drm/drmP.h:657: warning: cannot understand function prototype: 'struct drm_info_node '
   include/drm/drmP.h:667: warning: cannot understand function prototype: 'struct drm_minor '
   include/drm/drmP.h:715: warning: cannot understand function prototype: 'struct drm_device '
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'wedged'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'wedged'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'wedged'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'wedged'
   drivers/gpu/drm/i915/i915_irq.c:2582: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_gem.c:421: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:421: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:421: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:686: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:686: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:686: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:767: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:767: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:767: warning: No description found for parameter 'args'
   drivers/gpu/drm/i915/i915_gem.c:767: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1029: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1029: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1029: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1194: warning: No description found for parameter 'rps'
   drivers/gpu/drm/i915/i915_gem.c:1400: warning: No description found for parameter 'req'
   drivers/gpu/drm/i915/i915_gem.c:1435: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:1435: warning: No description found for parameter 'readonly'
   drivers/gpu/drm/i915/i915_gem.c:1558: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1558: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1558: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1621: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1621: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1621: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1666: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1666: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1666: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1954: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1954: warning: No description found for parameter 'size'
   drivers/gpu/drm/i915/i915_gem.c:1954: warning: No description found for parameter 'tiling_mode'
   drivers/gpu/drm/i915/i915_gem.c:1954: warning: No description found for parameter 'fenced'
   drivers/gpu/drm/i915/i915_gem.c:1954: warning: Excess function parameter 'obj' description in 'i915_gem_get_gtt_alignment'
   drivers/gpu/drm/i915/i915_gem.c:2816: warning: No description found for parameter 'ring'
   drivers/gpu/drm/i915/i915_gem.c:2945: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:2995: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:2995: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:2995: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:2995: warning: Excess function parameter 'DRM_IOCTL_ARGS' description in 'i915_gem_wait_ioctl'
   drivers/gpu/drm/i915/i915_gem.c:3364: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3364: warning: No description found for parameter 'vm'
   drivers/gpu/drm/i915/i915_gem.c:3364: warning: No description found for parameter 'ggtt_view'
   drivers/gpu/drm/i915/i915_gem.c:3364: warning: No description found for parameter 'alignment'
   drivers/gpu/drm/i915/i915_gem.c:3364: warning: No description found for parameter 'flags'
   drivers/gpu/drm/i915/i915_gem.c:3599: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3599: warning: No description found for parameter 'write'
   drivers/gpu/drm/i915/i915_gem.c:3674: warning: No description found for parameter 'obj'
>> drivers/gpu/drm/i915/i915_gem.c:3674: warning: No description found for parameter 'cache_level'
   drivers/gpu/drm/i915/i915_gem.c:3948: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3948: warning: No description found for parameter 'write'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: No description found for parameter 'params'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'dev' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'file' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'ring' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'ctx' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'batch_obj' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'exec_start' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'dispatch_flags' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: No description found for parameter 'params'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'dev' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'file' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'ring' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'ctx' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'batch_obj' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'exec_start' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:871: warning: Excess function parameter 'dispatch_flags' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_guc_loader.c:1: warning: no structured comments found
       Was looking for 'GuC-specific firmware loader'.
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: No description found for parameter 'rq'
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: Excess function parameter 'ctx' description in 'i915_guc_submit'
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: Excess function parameter 'ring' description in 'i915_guc_submit'
   drivers/gpu/drm/i915/i915_guc_submission.c:741: warning: No description found for parameter 'ctx'
   drivers/gpu/drm/i915/i915_guc_submission.c:1: warning: no structured comments found
       Was looking for 'GuC-based command submissison'.
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: No description found for parameter 'rq'
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: Excess function parameter 'ctx' description in 'i915_guc_submit'
   drivers/gpu/drm/i915/i915_guc_submission.c:598: warning: Excess function parameter 'ring' description in 'i915_guc_submit'
   drivers/gpu/drm/i915/i915_guc_submission.c:741: warning: No description found for parameter 'ctx'
   Warning: didn't use docs for i915_hotplug_interrupt_update
   Warning: didn't use docs for ilk_update_display_irq
   Warning: didn't use docs for ilk_update_gt_irq
   Warning: didn't use docs for snb_update_pm_irq
   Warning: didn't use docs for bdw_update_port_irq
   Warning: didn't use docs for ibx_display_interrupt_update
   Warning: didn't use docs for i915_enable_asle_pipestat
   Warning: didn't use docs for ivybridge_parity_work
   Warning: didn't use docs for i915_reset_and_wakeup
   Warning: didn't use docs for i915_handle_error
   Warning: didn't use docs for intel_irq_install
   Warning: didn't use docs for intel_irq_uninstall

vim +/cache_level +3674 drivers/gpu/drm/i915/i915_gem.c

e47c68e9 Eric Anholt   2008-11-14  3658  
fc05080c Chris Wilson  2015-10-09  3659  /**
fc05080c Chris Wilson  2015-10-09  3660   * Changes the cache-level of an object across all VMA.
fc05080c Chris Wilson  2015-10-09  3661   *
fc05080c Chris Wilson  2015-10-09  3662   * After this function returns, the object will be in the new cache-level
fc05080c Chris Wilson  2015-10-09  3663   * across all GTT and the contents of the backing storage will be coherent,
fc05080c Chris Wilson  2015-10-09  3664   * with respect to the new cache-level. In order to keep the backing storage
fc05080c Chris Wilson  2015-10-09  3665   * coherent for all users, we only allow a single cache level to be set
fc05080c Chris Wilson  2015-10-09  3666   * globally on the object and prevent it from being changed whilst the
fc05080c Chris Wilson  2015-10-09  3667   * hardware is reading from the object. That is if the object is currently
fc05080c Chris Wilson  2015-10-09  3668   * on the scanout it will be set to uncached (or equivalent display
fc05080c Chris Wilson  2015-10-09  3669   * cache coherency) and all non-MOCS GPU access will also be uncached so
fc05080c Chris Wilson  2015-10-09  3670   * that all direct access to the scanout remains coherent.
fc05080c Chris Wilson  2015-10-09  3671   */
e4ffd173 Chris Wilson  2011-04-04  3672  int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
e4ffd173 Chris Wilson  2011-04-04  3673  				    enum i915_cache_level cache_level)
e4ffd173 Chris Wilson  2011-04-04 @3674  {
7bddb01f Daniel Vetter 2012-02-09  3675  	struct drm_device *dev = obj->base.dev;
df6f783a Chris Wilson  2014-03-21  3676  	struct i915_vma *vma, *next;
fc05080c Chris Wilson  2015-10-09  3677  	bool bound = false;
ed75a55b Ville Syrjälä 2015-08-11  3678  	int ret = 0;
e4ffd173 Chris Wilson  2011-04-04  3679  
e4ffd173 Chris Wilson  2011-04-04  3680  	if (obj->cache_level == cache_level)
ed75a55b Ville Syrjälä 2015-08-11  3681  		goto out;
e4ffd173 Chris Wilson  2011-04-04  3682  

:::::: The code at line 3674 was first introduced by commit
:::::: e4ffd173a1c2f96b43127c2537dd99d89e759bba drm/i915: Add an interface to dynamically change the cache level

:::::: TO: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
:::::: CC: Keith Packard <keithp@xxxxxxxxxx>

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