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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: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2018-05-15 10:35:38 +08:00 committed by Zhenyu Wang
parent 7163484856
commit c3e697635f
2 changed files with 20 additions and 0 deletions
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19
drivers/gpu/drm/i915/gvt/gtt.c
View File

@ -390,6 +390,24 @@ static bool gen8_gtt_test_pse(struct intel_gvt_gtt_entry *e)
return !!(e->val64 & _PAGE_PSE); 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) static bool gen8_gtt_test_ips(struct intel_gvt_gtt_entry *e)
{ {
if (GEM_WARN_ON(e->type != GTT_TYPE_PPGTT_PDE_ENTRY)) 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, .set_present = gtt_entry_set_present,
.test_present = gen8_gtt_test_present, .test_present = gen8_gtt_test_present,
.test_pse = gen8_gtt_test_pse, .test_pse = gen8_gtt_test_pse,
.clear_pse = gen8_gtt_clear_pse,
.clear_ips = gen8_gtt_clear_ips, .clear_ips = gen8_gtt_clear_ips,
.test_ips = gen8_gtt_test_ips, .test_ips = gen8_gtt_test_ips,
.clear_64k_splited = gen8_gtt_clear_64k_splited, .clear_64k_splited = gen8_gtt_clear_64k_splited,

1
drivers/gpu/drm/i915/gvt/gtt.h
View File

@ -63,6 +63,7 @@ struct intel_gvt_gtt_pte_ops {
void (*clear_present)(struct intel_gvt_gtt_entry *e); void (*clear_present)(struct intel_gvt_gtt_entry *e);
void (*set_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); 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); bool (*test_ips)(struct intel_gvt_gtt_entry *e);
void (*clear_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); bool (*test_64k_splited)(struct intel_gvt_gtt_entry *e);