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-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c17
-rw-r--r--drivers/gpu/drm/i915/i915_reg.h1
-rw-r--r--drivers/gpu/drm/i915/intel_lrc.c60
3 files changed, 55 insertions, 23 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 229a31760260..2ab3cefd60b3 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -650,8 +650,8 @@ 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;
@@ -666,6 +666,12 @@ 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_pte_range(struct i915_address_space *vm,
struct i915_page_directory_pointer *pdp,
uint64_t start,
@@ -1318,14 +1324,13 @@ 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)
@@ -1340,6 +1345,7 @@ 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);
@@ -1537,8 +1543,9 @@ 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));
}
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8e46c348366b..88f20cc5ab8e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1679,6 +1679,7 @@ 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
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 5bc0ce1347ce..138964afd187 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -196,13 +196,21 @@
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 */
@@ -273,7 +281,7 @@ 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;
@@ -348,10 +356,12 @@ 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);
@@ -1515,12 +1525,15 @@ 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 (!USES_FULL_48BIT_PPGTT(req->i915)) {
+ ret = intel_logical_ring_emit_pdps(req);
+ if (ret)
+ return ret;
+ }
req->ctx->ppgtt->pd_dirty_rings &= ~intel_ring_flag(req->ring);
}
@@ -2201,13 +2214,24 @@ 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;
generated by cgit (git 2.34.1) at 2025-06-07 18:14:01 +0000