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Commit fbfd76c3 authored by Changbin Du's avatar Changbin Du Committed by Zhenyu Wang
Browse files

drm/i915/gvt: Add helper for tuning MMIO hash table 



We count all the tracked virtual MMIO registers, which can help us to
tune the MMIO hash table.

v2: Move num_tracked_mmio into gvt structure.

Signed-off-by: default avatarChangbin Du <changbin.du@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 5c6d4c67

drivers/gpu/drm/i915/gvt/gvt.h

+1 −0
Original line number Diff line number Diff line
@@ -215,6 +215,7 @@ struct intel_gvt_mmio { 
#define F_UNALIGN	(1 << 6)



	DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS);

	unsigned int num_tracked_mmio;

};



struct intel_gvt_firmware {

drivers/gpu/drm/i915/gvt/handlers.c

+4 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ static int new_mmio_info(struct intel_gvt *gvt, 
		gvt->mmio.mmio_attribute[info->offset / 4] = flags;

		INIT_HLIST_NODE(&info->node);

		hash_add(gvt->mmio.mmio_info_table, &info->node, info->offset);

		gvt->mmio.num_tracked_mmio++;

	}

	return 0;

}
@@ -2931,6 +2932,9 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt) 
		if (ret)

			goto err;

	}



	gvt_dbg_mmio("traced %u virtual mmio registers\n",

		     gvt->mmio.num_tracked_mmio);

	return 0;

err:

	intel_gvt_clean_mmio_info(gvt);