On navi4x and up, HW can monitor up to 2048 doorbells that not be
mapped currently and trigger the interrupt to MES when these unmapped
doorbell been ringed.
Signed-off-by: shaoyunl <shaoyun.liu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/mes_v12_0.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index ac41c649caa0..eac34ed1a504 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -455,6 +455,27 @@ static void mes_v12_0_init_aggregated_doorbell(struct amdgpu_mes *mes)
WREG32_SOC15(GC, 0, regCP_HQD_GFX_CONTROL, data);
}
+
+static void mes_v12_0_enable_unmapped_doorbell_handling(
+ struct amdgpu_mes *mes, bool enable)
+{
+ struct amdgpu_device *adev = mes->adev;
+ uint32_t data = RREG32_SOC15(GC, 0, regCP_UNMAPPED_DOORBELL);
+
+ /*
+ * The default PROC_LSB settng is 0xc which means doorbell
+ * addr[16:12] gives the doorbell page number. For kfd, each
+ * process will use 2 pages of doorbell, we need to change the
+ * setting to 0xd
+ */
+ data &= ~CP_UNMAPPED_DOORBELL__PROC_LSB_MASK;
+ data |= 0xd << CP_UNMAPPED_DOORBELL__PROC_LSB__SHIFT;
+
+ data |= (enable ? 1 : 0) << CP_UNMAPPED_DOORBELL__ENABLE__SHIFT;
+
+ WREG32_SOC15(GC, 0, regCP_UNMAPPED_DOORBELL, data);
+}
+
static const struct amdgpu_mes_funcs mes_v12_0_funcs = {
.add_hw_queue = mes_v12_0_add_hw_queue,
.remove_hw_queue = mes_v12_0_remove_hw_queue,
@@ -1235,6 +1256,9 @@ static int mes_v12_0_hw_init(void *handle)
mes_v12_0_init_aggregated_doorbell(&adev->mes);
+ /* Enable the MES to handle doorbell ring on unmapped queue */
+ mes_v12_0_enable_unmapped_doorbell_handling(&adev->mes, true);
+
r = mes_v12_0_query_sched_status(&adev->mes);
if (r) {
DRM_ERROR("MES is busy\n");
--
2.34.1
