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Commit c3e69763 authored by Changbin Du's avatar Changbin Du Committed by Zhenyu Wang
Browse files

drm/i915/gvt: Add GTT clear_pse operation 



Add clear_pse operation in case we need to split huge gtt into small pages.

v2: correct description.

Signed-off-by: default avatarChangbin Du <changbin.du@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 71634848

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

+19 −0
Original line number Diff line number Diff line
@@ -390,6 +390,24 @@ static bool gen8_gtt_test_pse(struct intel_gvt_gtt_entry *e) 
	return !!(e->val64 & _PAGE_PSE);

}



static void gen8_gtt_clear_pse(struct intel_gvt_gtt_entry *e)

{

	if (gen8_gtt_test_pse(e)) {

		switch (e->type) {

		case GTT_TYPE_PPGTT_PTE_2M_ENTRY:

			e->val64 &= ~_PAGE_PSE;

			e->type = GTT_TYPE_PPGTT_PDE_ENTRY;

			break;

		case GTT_TYPE_PPGTT_PTE_1G_ENTRY:

			e->type = GTT_TYPE_PPGTT_PDP_ENTRY;

			e->val64 &= ~_PAGE_PSE;

			break;

		default:

			WARN_ON(1);

		}

	}

}



static bool gen8_gtt_test_ips(struct intel_gvt_gtt_entry *e)

{

	if (GEM_WARN_ON(e->type != GTT_TYPE_PPGTT_PDE_ENTRY))
@@ -477,6 +495,7 @@ static struct intel_gvt_gtt_pte_ops gen8_gtt_pte_ops = { 
	.set_present = gtt_entry_set_present,

	.test_present = gen8_gtt_test_present,

	.test_pse = gen8_gtt_test_pse,

	.clear_pse = gen8_gtt_clear_pse,

	.clear_ips = gen8_gtt_clear_ips,

	.test_ips = gen8_gtt_test_ips,

	.clear_64k_splited = gen8_gtt_clear_64k_splited,

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

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ struct intel_gvt_gtt_pte_ops { 
	void (*clear_present)(struct intel_gvt_gtt_entry *e);

	void (*set_present)(struct intel_gvt_gtt_entry *e);

	bool (*test_pse)(struct intel_gvt_gtt_entry *e);

	void (*clear_pse)(struct intel_gvt_gtt_entry *e);

	bool (*test_ips)(struct intel_gvt_gtt_entry *e);

	void (*clear_ips)(struct intel_gvt_gtt_entry *e);

	bool (*test_64k_splited)(struct intel_gvt_gtt_entry *e);