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

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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: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2017-06-06 15:56:13 +08:00 committed by Zhenyu Wang
parent 5c6d4c676d
commit fbfd76c374
2 changed files with 5 additions and 0 deletions
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1
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -215,6 +215,7 @@ struct intel_gvt_mmio {
#define F_UNALIGN (1 << 6) #define F_UNALIGN (1 << 6)
DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS); DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS);
unsigned int num_tracked_mmio;
}; };
struct intel_gvt_firmware { struct intel_gvt_firmware {

4
drivers/gpu/drm/i915/gvt/handlers.c
View File

@ -124,6 +124,7 @@ static int new_mmio_info(struct intel_gvt *gvt,
gvt->mmio.mmio_attribute[info->offset / 4] = flags; gvt->mmio.mmio_attribute[info->offset / 4] = flags;
INIT_HLIST_NODE(&info->node); INIT_HLIST_NODE(&info->node);
hash_add(gvt->mmio.mmio_info_table, &info->node, info->offset); hash_add(gvt->mmio.mmio_info_table, &info->node, info->offset);
gvt->mmio.num_tracked_mmio++;
} }
return 0; return 0;
} }
@ -2931,6 +2932,9 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt)
if (ret) if (ret)
goto err; goto err;
} }
gvt_dbg_mmio("traced %u virtual mmio registers\n",
gvt->mmio.num_tracked_mmio);
return 0; return 0;
err: err:
intel_gvt_clean_mmio_info(gvt); intel_gvt_clean_mmio_info(gvt);