drm/amdgpu: implement burst NOP for SDMA
Customize the insert_nop func for SDMA rings, and use burst NOP for
ring/IB submissions in other places as well
Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index a7550a8..9bfe92d 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -306,6 +306,19 @@
}
}
+static void sdma_v3_0_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
+{
+ struct amdgpu_sdma *sdma = amdgpu_get_sdma_instance(ring);
+ int i;
+
+ for (i = 0; i < count; i++)
+ if (sdma && sdma->burst_nop && (i == 0))
+ amdgpu_ring_write(ring, ring->nop |
+ SDMA_PKT_NOP_HEADER_COUNT(count - 1));
+ else
+ amdgpu_ring_write(ring, ring->nop);
+}
+
/**
* sdma_v3_0_ring_emit_ib - Schedule an IB on the DMA engine
*
@@ -332,8 +345,7 @@
amdgpu_ring_write(ring, next_rptr);
/* IB packet must end on a 8 DW boundary */
- while ((ring->wptr & 7) != 2)
- amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_NOP));
+ sdma_v3_0_ring_insert_nop(ring, (10 - (ring->wptr & 7)) % 8);
amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_INDIRECT) |
SDMA_PKT_INDIRECT_HEADER_VMID(vmid));
@@ -1001,8 +1013,19 @@
*/
static void sdma_v3_0_vm_pad_ib(struct amdgpu_ib *ib)
{
- while (ib->length_dw & 0x7)
- ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_NOP);
+ struct amdgpu_sdma *sdma = amdgpu_get_sdma_instance(ib->ring);
+ u32 pad_count;
+ int i;
+
+ pad_count = (8 - (ib->length_dw & 0x7)) % 8;
+ for (i = 0; i < pad_count; i++)
+ if (sdma && sdma->burst_nop && (i == 0))
+ ib->ptr[ib->length_dw++] =
+ SDMA_PKT_HEADER_OP(SDMA_OP_NOP) |
+ SDMA_PKT_NOP_HEADER_COUNT(pad_count - 1);
+ else
+ ib->ptr[ib->length_dw++] =
+ SDMA_PKT_HEADER_OP(SDMA_OP_NOP);
}
/**
@@ -1440,7 +1463,7 @@
.test_ring = sdma_v3_0_ring_test_ring,
.test_ib = sdma_v3_0_ring_test_ib,
.is_lockup = sdma_v3_0_ring_is_lockup,
- .insert_nop = amdgpu_ring_insert_nop,
+ .insert_nop = sdma_v3_0_ring_insert_nop,
};
static void sdma_v3_0_set_ring_funcs(struct amdgpu_device *adev)