[PATCH] drm/i915: Make 48bit full ppgtt configuration generic (v3)

Bob Paauwe
2018-09-10T17:12:59Z

48 bit ppgtt device configuration is really just extended address
range full ppgtt and may actually be something other than 48 bits.

Change USES_FULL_48BIT_PPGTT() to USES_FULL_4LVL_PPGTT() to better
describe that a 4 level walk table extended range PPGTT is being
used. Add a new device info field that specifies the number of
bits to prepare for cases where the range is not 32 or 48 bits.

v2: keep USES_FULL_PPGTT() unchanged (Chris)
v3: Simplify condition in gen8_ppgtt_create() (Chris)
Remove unecessary line coninuations (Bob)
Rename functions/defines/comments from 48bit to 4lvl (Rodrigo/Bob)

Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
CC: Michel Thierry <michel.thierry@intel.com>
CC: Chris Wilson <chris@chris-wilson.co.uk>

Additional work to rename 48bit to 4 level

Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
---
drivers/gpu/drm/i915/gvt/vgpu.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
drivers/gpu/drm/i915/i915_gem_gtt.c | 24 ++++++++++++------------
drivers/gpu/drm/i915/i915_gem_gtt.h | 4 ++--
drivers/gpu/drm/i915/i915_pci.c | 7 +++++--
drivers/gpu/drm/i915/i915_pvinfo.h | 2 +-
drivers/gpu/drm/i915/i915_vgpu.c | 4 ++--
drivers/gpu/drm/i915/i915_vgpu.h | 2 +-
drivers/gpu/drm/i915/intel_device_info.h | 4 +++-
drivers/gpu/drm/i915/intel_lrc.c | 8 ++++----
drivers/gpu/drm/i915/selftests/huge_pages.c | 8 ++++----
drivers/gpu/drm/i915/selftests/mock_gem_device.c | 2 ++
13 files changed, 39 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index a4e8e3cf74fd..52bebd67173a 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -44,7 +44,7 @@ void populate_pvinfo_page(struct intel_vgpu *vgpu)
vgpu_vreg_t(vgpu, vgtif_reg(display_ready)) = 0;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_id)) = vgpu->id;

- vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_48BIT_PPGTT;
+ vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_4LVL_PPGTT;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HUGE_GTT;

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 5a4da5b723fd..a367686fd735 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2569,7 +2569,7 @@ intel_info(const struct drm_i915_private *dev_priv)

#define USES_PPGTT(dev_priv) (i915_modparams.enable_ppgtt)
#define USES_FULL_PPGTT(dev_priv) (i915_modparams.enable_ppgtt >= 2)
-#define USES_FULL_48BIT_PPGTT(dev_priv) (i915_modparams.enable_ppgtt == 3)
+#define USES_FULL_4LVL_PPGTT(dev_priv) ((dev_priv)->info.full_ppgtt_bits > 32)
#define HAS_PAGE_SIZES(dev_priv, sizes) ({ \
GEM_BUG_ON((sizes) == 0); \
((sizes) & ~(dev_priv)->info.page_sizes) == 0; \
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index f15a039772db..1add339ca6be 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -249,7 +249,7 @@ static u32 default_desc_template(const struct drm_i915_private *i915,
desc = GEN8_CTX_VALID | GEN8_CTX_PRIVILEGE;

address_mode = INTEL_LEGACY_32B_CONTEXT;
- if (ppgtt && i915_vm_is_48bit(&ppgtt->vm))
+ if (ppgtt && i915_vm_is_4lvl(&ppgtt->vm))
address_mode = INTEL_LEGACY_64B_CONTEXT;
desc |= address_mode << GEN8_CTX_ADDRESSING_MODE_SHIFT;

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index eb0e446d6482..c66bbf409791 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -137,18 +137,18 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
int enable_ppgtt)
{
bool has_full_ppgtt;
- bool has_full_48bit_ppgtt;
+ bool has_full_4lvl_ppgtt;

if (!dev_priv->info.has_aliasing_ppgtt)
return 0;

has_full_ppgtt = dev_priv->info.has_full_ppgtt;
- has_full_48bit_ppgtt = dev_priv->info.has_full_48bit_ppgtt;
+ has_full_4lvl_ppgtt = USES_FULL_4LVL_PPGTT(dev_priv);

if (intel_vgpu_active(dev_priv)) {
/* GVT-g has no support for 32bit ppgtt */
has_full_ppgtt = false;
- has_full_48bit_ppgtt = intel_vgpu_has_full_48bit_ppgtt(dev_priv);
+ has_full_4lvl_ppgtt = intel_vgpu_has_full_4lvl_ppgtt(dev_priv);
}

/*
@@ -164,7 +164,7 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
if (enable_ppgtt == 2 && has_full_ppgtt)
return 2;

- if (enable_ppgtt == 3 && has_full_48bit_ppgtt)
+ if (enable_ppgtt == 3 && has_full_4lvl_ppgtt)
return 3;

/* Disable ppgtt on SNB if VT-d is on. */
@@ -173,7 +173,7 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
return 0;
}

- if (has_full_48bit_ppgtt)
+ if (has_full_4lvl_ppgtt)
return 3;

if (has_full_ppgtt)
@@ -628,14 +628,14 @@ setup_scratch_page(struct i915_address_space *vm, gfp_t gfp)
* page-table operating in 64K mode must point to a properly aligned 64K
* region, including any PTEs which happen to point to scratch.
*
- * This is only relevant for the 48b PPGTT where we support
+ * This is only relevant for the 4-level PPGTT where we support
* huge-gtt-pages, see also i915_vma_insert().
*
* TODO: we should really consider write-protecting the scratch-page and
* sharing between ppgtt
*/
size = I915_GTT_PAGE_SIZE_4K;
- if (i915_vm_is_48bit(vm) &&
+ if (i915_vm_is_4lvl(vm) &&
HAS_PAGE_SIZES(vm->i915, I915_GTT_PAGE_SIZE_64K)) {
size = I915_GTT_PAGE_SIZE_64K;
gfp |= __GFP_NOWARN;
@@ -780,7 +780,7 @@ static void __pdp_fini(struct i915_page_directory_pointer *pdp)

static inline bool use_4lvl(const struct i915_address_space *vm)
{
- return i915_vm_is_48bit(vm);
+ return i915_vm_is_4lvl(vm);
}

static struct i915_page_directory_pointer *
@@ -1647,9 +1647,9 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
ppgtt->vm.i915 = i915;
ppgtt->vm.dma = &i915->drm.pdev->dev;

- ppgtt->vm.total = USES_FULL_48BIT_PPGTT(i915) ?
- 1ULL << 48 :
- 1ULL << 32;
+ ppgtt->vm.total = BIT_ULL(i915->info.full_ppgtt_bits);
+ if (i915_modparams.enable_ppgtt < 3)
+ ppgtt->vm.total = min(ppgtt->vm.total, SZ_4G);

/*
* From bdw, there is support for read-only pages in the PPGTT.
@@ -1788,7 +1788,7 @@ static void gen8_ppgtt_enable(struct drm_i915_private *dev_priv)
enum intel_engine_id id;

for_each_engine(engine, dev_priv, id) {
- u32 four_level = USES_FULL_48BIT_PPGTT(dev_priv) ?
+ u32 four_level = USES_FULL_4LVL_PPGTT(dev_priv) ?
GEN8_GFX_PPGTT_48B : 0;
I915_WRITE(RING_MODE_GEN7(engine),
_MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE | four_level));
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 7e2af5f4f39b..b2a709a27cb9 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -363,7 +363,7 @@ struct i915_address_space {
#define i915_is_ggtt(vm) ((vm)->is_ggtt)

static inline bool
-i915_vm_is_48bit(const struct i915_address_space *vm)
+i915_vm_is_4lvl(const struct i915_address_space *vm)
{
return (vm->total - 1) >> 32;
}
@@ -506,7 +506,7 @@ static inline u32 gen6_pde_index(u32 addr)
static inline unsigned int
i915_pdpes_per_pdp(const struct i915_address_space *vm)
{
- if (i915_vm_is_48bit(vm))
+ if (i915_vm_is_4lvl(vm))
return GEN8_PML4ES_PER_PML4;

return GEN8_3LVL_PDPES;
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index d6f7b9fe1d26..e0619952ff52 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -299,6 +299,7 @@ static const struct intel_device_info intel_sandybridge_m_gt2_info = {
.has_rc6p = 1, \
.has_aliasing_ppgtt = 1, \
.has_full_ppgtt = 1, \
+ .full_ppgtt_bits = 32, \
GEN_DEFAULT_PIPEOFFSETS, \
GEN_DEFAULT_PAGE_SIZES, \
IVB_CURSOR_OFFSETS
@@ -353,6 +354,7 @@ static const struct intel_device_info intel_valleyview_info = {
.has_hotplug = 1,
.has_aliasing_ppgtt = 1,
.has_full_ppgtt = 1,
+ .full_ppgtt_bits = 32,
.has_snoop = true,
.has_coherent_ggtt = false,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING,
@@ -399,7 +401,7 @@ static const struct intel_device_info intel_haswell_gt3_info = {
.page_sizes = I915_GTT_PAGE_SIZE_4K | \
I915_GTT_PAGE_SIZE_2M, \
.has_logical_ring_contexts = 1, \
- .has_full_48bit_ppgtt = 1, \
+ .full_ppgtt_bits = 48, \
.has_64bit_reloc = 1, \
.has_reset_engine = 1

@@ -445,6 +447,7 @@ static const struct intel_device_info intel_cherryview_info = {
.has_gmch_display = 1,
.has_aliasing_ppgtt = 1,
.has_full_ppgtt = 1,
+ .full_ppgtt_bits = 32,
.has_reset_engine = 1,
.has_snoop = true,
.has_coherent_ggtt = false,
@@ -520,7 +523,7 @@ static const struct intel_device_info intel_skylake_gt4_info = {
.has_guc = 1, \
.has_aliasing_ppgtt = 1, \
.has_full_ppgtt = 1, \
- .has_full_48bit_ppgtt = 1, \
+ .full_ppgtt_bits = 48, \
.has_reset_engine = 1, \
.has_snoop = true, \
.has_coherent_ggtt = false, \
diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h
index eeaa3d506d95..6d2f9f06ab57 100644
--- a/drivers/gpu/drm/i915/i915_pvinfo.h
+++ b/drivers/gpu/drm/i915/i915_pvinfo.h
@@ -52,7 +52,7 @@ enum vgt_g2v_type {
/*
* VGT capabilities type
*/
-#define VGT_CAPS_FULL_48BIT_PPGTT BIT(2)
+#define VGT_CAPS_FULL_4LVL_PPGTT BIT(2)
#define VGT_CAPS_HWSP_EMULATION BIT(3)
#define VGT_CAPS_HUGE_GTT BIT(4)

diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
index 869cf4a3b6de..180f2dca1223 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.c
+++ b/drivers/gpu/drm/i915/i915_vgpu.c
@@ -81,9 +81,9 @@ void i915_check_vgpu(struct drm_i915_private *dev_priv)
DRM_INFO("Virtual GPU for Intel GVT-g detected.\n");
}

-bool intel_vgpu_has_full_48bit_ppgtt(struct drm_i915_private *dev_priv)
+bool intel_vgpu_has_full_4lvl_ppgtt(struct drm_i915_private *dev_priv)
{
- return dev_priv->vgpu.caps & VGT_CAPS_FULL_48BIT_PPGTT;
+ return dev_priv->vgpu.caps & VGT_CAPS_FULL_4LVL_PPGTT;
}

struct _balloon_info_ {
diff --git a/drivers/gpu/drm/i915/i915_vgpu.h b/drivers/gpu/drm/i915/i915_vgpu.h
index 551acc390046..b830a7b5064f 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.h
+++ b/drivers/gpu/drm/i915/i915_vgpu.h
@@ -28,7 +28,7 @@

void i915_check_vgpu(struct drm_i915_private *dev_priv);

-bool intel_vgpu_has_full_48bit_ppgtt(struct drm_i915_private *dev_priv);
+bool intel_vgpu_has_full_4lvl_ppgtt(struct drm_i915_private *dev_priv);

static inline bool
intel_vgpu_has_hwsp_emulation(struct drm_i915_private *dev_priv)
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 6eecd64734d5..50acb0463e9a 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -88,7 +88,6 @@ enum intel_platform {
func(has_fbc); \
func(has_fpga_dbg); \
func(has_full_ppgtt); \
- func(has_full_48bit_ppgtt); \
func(has_gmch_display); \
func(has_guc); \
func(has_guc_ct); \
@@ -182,6 +181,9 @@ struct intel_device_info {
u16 degamma_lut_size;
u16 gamma_lut_size;
} color;
+
+ /* PPGTT bit size */
+ int full_ppgtt_bits;
};

struct intel_driver_caps {
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index def467c2451b..52a86a8c06b7 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -429,7 +429,7 @@ static u64 execlists_update_context(struct i915_request *rq)
* PML4 is allocated during ppgtt init, so this is not needed
* in 48-bit mode.
*/
- if (ppgtt && !i915_vm_is_48bit(&ppgtt->vm))
+ if (ppgtt && !i915_vm_is_4lvl(&ppgtt->vm))
execlists_update_context_pdps(ppgtt, reg_state);

return ce->lrc_desc;
@@ -2019,7 +2019,7 @@ static int gen8_emit_bb_start(struct i915_request *rq,
* not needed in 48-bit.*/
if (rq->gem_context->ppgtt &&
(intel_engine_flag(rq->engine) & rq->gem_context->ppgtt->pd_dirty_rings) &&
- !i915_vm_is_48bit(&rq->gem_context->ppgtt->vm) &&
+ !i915_vm_is_4lvl(&rq->gem_context->ppgtt->vm) &&
!intel_vgpu_active(rq->i915)) {
ret = intel_logical_ring_emit_pdps(rq);
if (ret)
@@ -2688,8 +2688,8 @@ static void execlists_init_reg_state(u32 *regs,
CTX_REG(regs, CTX_PDP0_UDW, GEN8_RING_PDP_UDW(engine, 0), 0);
CTX_REG(regs, CTX_PDP0_LDW, GEN8_RING_PDP_LDW(engine, 0), 0);

- if (ppgtt && i915_vm_is_48bit(&ppgtt->vm)) {
- /* 64b PPGTT (48bit canonical)
+ if (ppgtt && i915_vm_is_4lvl(&ppgtt->vm)) {
+ /* > 32b PPGTT
* PDP0_DESCRIPTOR contains the base address to PML4 and
* other PDP Descriptors are ignored.
*/
diff --git a/drivers/gpu/drm/i915/selftests/huge_pages.c b/drivers/gpu/drm/i915/selftests/huge_pages.c
index e272127783fe..b065630bf672 100644
--- a/drivers/gpu/drm/i915/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/selftests/huge_pages.c
@@ -1434,8 +1434,8 @@ static int igt_ppgtt_pin_update(void *arg)
* huge-gtt-pages.
*/

- if (!USES_FULL_48BIT_PPGTT(dev_priv)) {
- pr_info("48b PPGTT not supported, skipping\n");
+ if (!USES_FULL_4LVL_PPGTT(dev_priv)) {
+ pr_info("Extended range PPGTT not supported, skipping\n");
return 0;
}

@@ -1708,8 +1708,8 @@ int i915_gem_huge_page_mock_selftests(void)
goto out_unlock;
}

- if (!i915_vm_is_48bit(&ppgtt->vm)) {
- pr_err("failed to create 48b PPGTT\n");
+ if (!i915_vm_is_4lvl(&ppgtt->vm)) {
+ pr_err("failed to create extended PPGTT\n");
err = -EINVAL;
goto out_close;
}
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 43ed8b28aeaa..33d7225edbbb 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -181,6 +181,8 @@ struct drm_i915_private *mock_gem_device(void)
I915_GTT_PAGE_SIZE_64K |
I915_GTT_PAGE_SIZE_2M;

+ mkwrite_device_info(i915)->full_ppgtt_bits = 48;
+
mock_uncore_init(i915);
i915_gem_init__mm(i915);

--
2.14.4