[PATCH 3/6] drm/amdgpu:change SR-IOV DMAframe scheme

[Monk Liu]

According to CP/hw team requirment, to support PAL/CHAINED-IB
MCBP, kernel driver must guarantee DE_META must be inserted
right prior to the work_load DE IB (with PREEMPT flag), there
cannot be any non-work_load DE IB between-in DE_META and
work_load DE IB.

Change-Id: Ie060f1a39effa1edd5e3bf10c08624ffc82dfa44
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c |  9 +++++----
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 10 ++++++----
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index e547df4..eed5745 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -6407,9 +6407,13 @@ static void gfx_v8_0_ring_emit_ib_gfx(struct amdgpu_ring *ring,
 
 	control |= ib->length_dw | (vm_id << 24);
 
-	if (amdgpu_sriov_vf(ring->adev) && ib->flags & AMDGPU_IB_FLAG_PREEMPT)
+	if (amdgpu_sriov_vf(ring->adev) && (ib->flags & AMDGPU_IB_FLAG_PREEMPT)) {
 		control |= INDIRECT_BUFFER_PRE_ENB(1);
 
+		if (!(ib->flags & AMDGPU_IB_FLAG_CE))
+			gfx_v8_0_ring_emit_de_meta(ring);
+	}
+
 	amdgpu_ring_write(ring, header);
 	amdgpu_ring_write(ring,
 #ifdef __BIG_ENDIAN
@@ -6618,9 +6622,6 @@ static void gfx_v8_ring_emit_cntxcntl(struct amdgpu_ring *ring, uint32_t flags)
 	amdgpu_ring_write(ring, PACKET3(PACKET3_CONTEXT_CONTROL, 1));
 	amdgpu_ring_write(ring, dw2);
 	amdgpu_ring_write(ring, 0);
-
-	if (amdgpu_sriov_vf(ring->adev))
-		gfx_v8_0_ring_emit_de_meta(ring);
 }
 
 static unsigned gfx_v8_0_ring_emit_init_cond_exec(struct amdgpu_ring *ring)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 6857581..f192297 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -119,6 +119,7 @@ static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
                                  struct amdgpu_cu_info *cu_info);
 static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device *adev);
 static void gfx_v9_0_select_se_sh(struct amdgpu_device *adev, u32 se_num, u32 sh_num, u32 instance);
+static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring);
 
 static void gfx_v9_0_init_golden_registers(struct amdgpu_device *adev)
 {
@@ -2882,9 +2883,13 @@ static void gfx_v9_0_ring_emit_ib_gfx(struct amdgpu_ring *ring,
 
 	control |= ib->length_dw | (vm_id << 24);
 
-	if (amdgpu_sriov_vf(ring->adev) && (ib->flags & AMDGPU_IB_FLAG_PREEMPT))
+	if (amdgpu_sriov_vf(ring->adev) && (ib->flags & AMDGPU_IB_FLAG_PREEMPT)) {
 		control |= INDIRECT_BUFFER_PRE_ENB(1);
 
+		if (!(ib->flags & AMDGPU_IB_FLAG_CE))
+			gfx_v9_0_ring_emit_de_meta(ring);
+	}
+
 	amdgpu_ring_write(ring, header);
 BUG_ON(ib->gpu_addr & 0x3); /* Dword align */
 	amdgpu_ring_write(ring,
@@ -3124,9 +3129,6 @@ static void gfx_v9_ring_emit_cntxcntl(struct amdgpu_ring *ring, uint32_t flags)
 	amdgpu_ring_write(ring, PACKET3(PACKET3_CONTEXT_CONTROL, 1));
 	amdgpu_ring_write(ring, dw2);
 	amdgpu_ring_write(ring, 0);
-
-	if (amdgpu_sriov_vf(ring->adev))
-		gfx_v9_0_ring_emit_de_meta(ring);
 }
 
 static unsigned gfx_v9_0_ring_emit_init_cond_exec(struct amdgpu_ring *ring)
-- 
2.7.4