[drm-intel:for-linux-next 2/2] drivers/gpu//drm/i915/i915_guc_submission.c:391:25: warning: cast from pointer to integer of different size

[kbuild test robot]

tree:   git://anongit.freedesktop.org/drm-intel for-linux-next
head:   faf654864b25f4ca4efd416145d37b794c0b805f
commit: faf654864b25f4ca4efd416145d37b794c0b805f [2/2] drm/i915: Unify uC variable types to avoid flooding checkpatch.pl
config: i386-randconfig-x005-201740 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout faf654864b25f4ca4efd416145d37b794c0b805f
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/gpu//drm/i915/i915_guc_submission.c: In function 'guc_stage_desc_init':
>> drivers/gpu//drm/i915/i915_guc_submission.c:391:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     desc->db_trigger_cpu = (u64)__get_doorbell(client);
                            ^
   drivers/gpu//drm/i915/i915_guc_submission.c:397:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     desc->desc_private = (u64)client;
                          ^

vim +391 drivers/gpu//drm/i915/i915_guc_submission.c

   313	
   314	/*
   315	 * Initialise/clear the stage descriptor shared with the GuC firmware.
   316	 *
   317	 * This descriptor tells the GuC where (in GGTT space) to find the important
   318	 * data structures relating to this client (doorbell, process descriptor,
   319	 * write queue, etc).
   320	 */
   321	static void guc_stage_desc_init(struct intel_guc *guc,
   322					struct i915_guc_client *client)
   323	{
   324		struct drm_i915_private *dev_priv = guc_to_i915(guc);
   325		struct intel_engine_cs *engine;
   326		struct i915_gem_context *ctx = client->owner;
   327		struct guc_stage_desc *desc;
   328		unsigned int tmp;
   329		u32 gfx_addr;
   330	
   331		desc = __get_stage_desc(client);
   332		memset(desc, 0, sizeof(*desc));
   333	
   334		desc->attribute = GUC_STAGE_DESC_ATTR_ACTIVE | GUC_STAGE_DESC_ATTR_KERNEL;
   335		desc->stage_id = client->stage_id;
   336		desc->priority = client->priority;
   337		desc->db_id = client->doorbell_id;
   338	
   339		for_each_engine_masked(engine, dev_priv, client->engines, tmp) {
   340			struct intel_context *ce = &ctx->engine[engine->id];
   341			u32 guc_engine_id = engine->guc_id;
   342			struct guc_execlist_context *lrc = &desc->lrc[guc_engine_id];
   343	
   344			/* TODO: We have a design issue to be solved here. Only when we
   345			 * receive the first batch, we know which engine is used by the
   346			 * user. But here GuC expects the lrc and ring to be pinned. It
   347			 * is not an issue for default context, which is the only one
   348			 * for now who owns a GuC client. But for future owner of GuC
   349			 * client, need to make sure lrc is pinned prior to enter here.
   350			 */
   351			if (!ce->state)
   352				break;	/* XXX: continue? */
   353	
   354			/*
   355			 * XXX: When this is a GUC_STAGE_DESC_ATTR_KERNEL client (proxy
   356			 * submission or, in other words, not using a direct submission
   357			 * model) the KMD's LRCA is not used for any work submission.
   358			 * Instead, the GuC uses the LRCA of the user mode context (see
   359			 * guc_wq_item_append below).
   360			 */
   361			lrc->context_desc = lower_32_bits(ce->lrc_desc);
   362	
   363			/* The state page is after PPHWSP */
   364			lrc->ring_lrca =
   365				guc_ggtt_offset(ce->state) + LRC_STATE_PN * PAGE_SIZE;
   366	
   367			/* XXX: In direct submission, the GuC wants the HW context id
   368			 * here. In proxy submission, it wants the stage id */
   369			lrc->context_id = (client->stage_id << GUC_ELC_CTXID_OFFSET) |
   370					(guc_engine_id << GUC_ELC_ENGINE_OFFSET);
   371	
   372			lrc->ring_begin = guc_ggtt_offset(ce->ring->vma);
   373			lrc->ring_end = lrc->ring_begin + ce->ring->size - 1;
   374			lrc->ring_next_free_location = lrc->ring_begin;
   375			lrc->ring_current_tail_pointer_value = 0;
   376	
   377			desc->engines_used |= (1 << guc_engine_id);
   378		}
   379	
   380		DRM_DEBUG_DRIVER("Host engines 0x%x => GuC engines used 0x%x\n",
   381				client->engines, desc->engines_used);
   382		WARN_ON(desc->engines_used == 0);
   383	
   384		/*
   385		 * The doorbell, process descriptor, and workqueue are all parts
   386		 * of the client object, which the GuC will reference via the GGTT
   387		 */
   388		gfx_addr = guc_ggtt_offset(client->vma);
   389		desc->db_trigger_phy = sg_dma_address(client->vma->pages->sgl) +
   390					client->doorbell_offset;
 > 391		desc->db_trigger_cpu = (u64)__get_doorbell(client);
   392		desc->db_trigger_uk = gfx_addr + client->doorbell_offset;
   393		desc->process_desc = gfx_addr + client->proc_desc_offset;
   394		desc->wq_addr = gfx_addr + GUC_DB_SIZE;
   395		desc->wq_size = GUC_WQ_SIZE;
   396	
   397		desc->desc_private = (u64)client;
   398	}
   399	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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