@@ -210,6 +210,9 @@ static gen8_pde_t gen8_pde_encode(const dma_addr_t addr,
return pde;
}
+#define gen8_pdpe_encode gen8_pde_encode
+#define gen8_pml4e_encode gen8_pde_encode
+
static gen6_pte_t snb_pte_encode(dma_addr_t addr,
enum i915_cache_level level,
bool valid, u32 unused)
@@ -599,6 +602,35 @@ static void free_pdp(struct drm_device *dev,
}
}
+static void
+gen8_setup_page_directory(struct i915_hw_ppgtt *ppgtt,
+ struct i915_page_directory_pointer *pdp,
+ struct i915_page_directory *pd,
+ int index)
+{
+ gen8_ppgtt_pdpe_t *page_directorypo;
+
+ if (!USES_FULL_48BIT_PPGTT(ppgtt->base.dev))
+ return;
+
+ page_directorypo = kmap_px(pdp);
+ page_directorypo[index] = gen8_pdpe_encode(px_dma(pd), I915_CACHE_LLC);
+ kunmap_px(ppgtt, page_directorypo);
+}
+
+static void
+gen8_setup_page_directory_pointer(struct i915_hw_ppgtt *ppgtt,
+ struct i915_pml4 *pml4,
+ struct i915_page_directory_pointer *pdp,
+ int index)
+{
+ gen8_ppgtt_pml4e_t *pagemap = kmap_px(pml4);
+
+ WARN_ON(!USES_FULL_48BIT_PPGTT(ppgtt->base.dev));
+ pagemap[index] = gen8_pml4e_encode(px_dma(pdp), I915_CACHE_LLC);
+ kunmap_px(ppgtt, pagemap);
+}
+
/* Broadwell Page Directory Pointer Descriptors */
static int gen8_write_pdp(struct drm_i915_gem_request *req,
unsigned entry,
@@ -624,8 +656,8 @@ static int gen8_write_pdp(struct drm_i915_gem_request *req,
return 0;
}
-static int gen8_mm_switch(struct i915_hw_ppgtt *ppgtt,
- struct drm_i915_gem_request *req)
+static int gen8_legacy_mm_switch(struct i915_hw_ppgtt *ppgtt,
+ struct drm_i915_gem_request *req)
{
int i, ret;
@@ -640,6 +672,12 @@ static int gen8_mm_switch(struct i915_hw_ppgtt *ppgtt,
return 0;
}
+static int gen8_48b_mm_switch(struct i915_hw_ppgtt *ppgtt,
+ struct drm_i915_gem_request *req)
+{
+ return gen8_write_pdp(req, 0, px_dma(&ppgtt->pml4));
+}
+
static void gen8_ppgtt_clear_range(struct i915_address_space *vm,
uint64_t start,
uint64_t length,
@@ -1100,6 +1138,7 @@ static int gen8_alloc_va_range_3lvl(struct i915_address_space *vm,
kunmap_px(ppgtt, page_directory);
__set_bit(pdpe, pdp->used_pdpes);
+ gen8_setup_page_directory(ppgtt, pdp, pd, pdpe);
}
free_gen8_temp_bitmaps(new_page_dirs, new_page_tables, pdpes);
@@ -1126,6 +1165,8 @@ static int gen8_alloc_va_range_4lvl(struct i915_address_space *vm,
uint64_t length)
{
DECLARE_BITMAP(new_pdps, GEN8_PML4ES_PER_PML4);
+ struct i915_hw_ppgtt *ppgtt =
+ container_of(vm, struct i915_hw_ppgtt, base);
struct i915_page_directory_pointer *pdp;
const uint64_t orig_start = start;
const uint64_t orig_length = length;
@@ -1167,6 +1208,8 @@ static int gen8_alloc_va_range_4lvl(struct i915_address_space *vm,
ret = gen8_alloc_va_range_3lvl(vm, pdp, start, length);
if (ret)
goto err_out;
+
+ gen8_setup_page_directory_pointer(ppgtt, pml4, pdp, pml4e);
}
bitmap_or(pml4->used_pml4es, new_pdps, pml4->used_pml4es,
@@ -1216,14 +1259,13 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
- ppgtt->switch_mm = gen8_mm_switch;
-
if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) {
ret = setup_px(ppgtt->base.dev, &ppgtt->pml4);
if (ret)
goto free_scratch;
ppgtt->base.total = 1ULL << 48;
+ ppgtt->switch_mm = gen8_48b_mm_switch;
} else {
ret = __pdp_init(false, &ppgtt->pdp);
if (ret)
@@ -1238,6 +1280,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
*/
ppgtt->base.total = to_i915(ppgtt->base.dev)->gtt.base.total;
+ ppgtt->switch_mm = gen8_legacy_mm_switch;
trace_i915_page_directory_pointer_entry_alloc(&ppgtt->base,
0, 0,
GEN8_PML4E_SHIFT);
@@ -1435,8 +1478,9 @@ static void gen8_ppgtt_enable(struct drm_device *dev)
int j;
for_each_ring(ring, dev_priv, j) {
+ u32 four_level = USES_FULL_48BIT_PPGTT(dev) ? GEN8_GFX_PPGTT_48B : 0;
I915_WRITE(RING_MODE_GEN7(ring),
- _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE));
+ _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE | four_level));
}
}
@@ -39,6 +39,8 @@ struct drm_i915_file_private;
typedef uint32_t gen6_pte_t;
typedef uint64_t gen8_pte_t;
typedef uint64_t gen8_pde_t;
+typedef uint64_t gen8_ppgtt_pdpe_t;
+typedef uint64_t gen8_ppgtt_pml4e_t;
#define gtt_total_entries(gtt) ((gtt).base.total >> PAGE_SHIFT)
@@ -1669,6 +1669,7 @@ enum skl_disp_power_wells {
#define GFX_REPLAY_MODE (1<<11)
#define GFX_PSMI_GRANULARITY (1<<10)
#define GFX_PPGTT_ENABLE (1<<9)
+#define GEN8_GFX_PPGTT_48B (1<<7)
#define VLV_DISPLAY_BASE 0x180000
#define VLV_MIPI_BASE VLV_DISPLAY_BASE
@@ -195,13 +195,21 @@
reg_state[CTX_PDP ## n ## _LDW+1] = lower_32_bits(_addr); \
}
+#define ASSIGN_CTX_PML4(ppgtt, reg_state) { \
+ reg_state[CTX_PDP0_UDW + 1] = upper_32_bits(px_dma(&ppgtt->pml4)); \
+ reg_state[CTX_PDP0_LDW + 1] = lower_32_bits(px_dma(&ppgtt->pml4)); \
+}
+
enum {
ADVANCED_CONTEXT = 0,
- LEGACY_CONTEXT,
+ LEGACY_32B_CONTEXT,
ADVANCED_AD_CONTEXT,
LEGACY_64B_CONTEXT
};
-#define GEN8_CTX_MODE_SHIFT 3
+#define GEN8_CTX_ADDRESSING_MODE_SHIFT 3
+#define GEN8_CTX_ADDRESSING_MODE(dev) (USES_FULL_48BIT_PPGTT(dev) ?\
+ LEGACY_64B_CONTEXT :\
+ LEGACY_32B_CONTEXT)
enum {
FAULT_AND_HANG = 0,
FAULT_AND_HALT, /* Debug only */
@@ -272,7 +280,7 @@ static uint64_t execlists_ctx_descriptor(struct drm_i915_gem_request *rq)
WARN_ON(lrca & 0xFFFFFFFF00000FFFULL);
desc = GEN8_CTX_VALID;
- desc |= LEGACY_CONTEXT << GEN8_CTX_MODE_SHIFT;
+ desc |= GEN8_CTX_ADDRESSING_MODE(dev) << GEN8_CTX_ADDRESSING_MODE_SHIFT;
if (IS_GEN8(ctx_obj->base.dev))
desc |= GEN8_CTX_L3LLC_COHERENT;
desc |= GEN8_CTX_PRIVILEGE;
@@ -347,10 +355,12 @@ static int execlists_update_context(struct drm_i915_gem_request *rq)
reg_state[CTX_RING_TAIL+1] = rq->tail;
reg_state[CTX_RING_BUFFER_START+1] = i915_gem_obj_ggtt_offset(rb_obj);
- /* True PPGTT with dynamic page allocation: update PDP registers and
- * point the unallocated PDPs to the scratch page
- */
- if (ppgtt) {
+ if (ppgtt && !USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) {
+ /* True 32b PPGTT with dynamic page allocation: update PDP
+ * registers and point the unallocated PDPs to scratch page.
+ * PML4 is allocated during ppgtt init, so this is not needed
+ * in 48-bit mode.
+ */
ASSIGN_CTX_PDP(ppgtt, reg_state, 3);
ASSIGN_CTX_PDP(ppgtt, reg_state, 2);
ASSIGN_CTX_PDP(ppgtt, reg_state, 1);
@@ -1433,12 +1443,15 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
* Ideally, we should set Force PD Restore in ctx descriptor,
* but we can't. Force Restore would be a second option, but
* it is unsafe in case of lite-restore (because the ctx is
- * not idle). */
+ * not idle). PML4 is allocated during ppgtt init so this is
+ * not needed in 48-bit.*/
if (req->ctx->ppgtt &&
(intel_ring_flag(req->ring) & req->ctx->ppgtt->pd_dirty_rings)) {
- ret = intel_logical_ring_emit_pdps(req);
- if (ret)
- return ret;
+ if (GEN8_CTX_ADDRESSING_MODE(req->i915) == LEGACY_32B_CONTEXT) {
+ ret = intel_logical_ring_emit_pdps(req);
+ if (ret)
+ return ret;
+ }
req->ctx->ppgtt->pd_dirty_rings &= ~intel_ring_flag(req->ring);
}
@@ -2105,13 +2118,24 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o
reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0);
reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0);
- /* With dynamic page allocation, PDPs may not be allocated at this point,
- * Point the unallocated PDPs to the scratch page
- */
- ASSIGN_CTX_PDP(ppgtt, reg_state, 3);
- ASSIGN_CTX_PDP(ppgtt, reg_state, 2);
- ASSIGN_CTX_PDP(ppgtt, reg_state, 1);
- ASSIGN_CTX_PDP(ppgtt, reg_state, 0);
+ if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) {
+ /* 64b PPGTT (48bit canonical)
+ * PDP0_DESCRIPTOR contains the base address to PML4 and
+ * other PDP Descriptors are ignored.
+ */
+ ASSIGN_CTX_PML4(ppgtt, reg_state);
+ } else {
+ /* 32b PPGTT
+ * PDP*_DESCRIPTOR contains the base address of space supported.
+ * With dynamic page allocation, PDPs may not be allocated at
+ * this point. Point the unallocated PDPs to the scratch page
+ */
+ ASSIGN_CTX_PDP(ppgtt, reg_state, 3);
+ ASSIGN_CTX_PDP(ppgtt, reg_state, 2);
+ ASSIGN_CTX_PDP(ppgtt, reg_state, 1);
+ ASSIGN_CTX_PDP(ppgtt, reg_state, 0);
+ }
+
if (ring->id == RCS) {
reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
reg_state[CTX_R_PWR_CLK_STATE] = GEN8_R_PWR_CLK_STATE;