arcturus allows driver to program ih_cfg_index/data
through mmio directly in case page faults overwhlem
the interrupt handlers and the driver lost the valuable
interrupt information
Change-Id: I24ca6df60ed2ae1ff0ca208d90531268a30f3a73
Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Acked-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Reviewed-by: Dennis Li <Dennis.Li@xxxxxxx>
Reviewed-by: Feifei Xu <Feifei.Xu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/vega20_ih.c | 34 ++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
index e18989ff50a2..c481ff00152c 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
@@ -248,6 +248,38 @@ static int vega20_ih_enable_ring(struct amdgpu_device *adev,
return 0;
}
+/**
+ * vega20_ih_reroute_ih - reroute VMC/UTCL2 ih to an ih ring
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Reroute VMC and UMC interrupts on primary ih ring to
+ * ih ring 1 so they won't lose when bunches of page faults
+ * interrupts overwhelms the interrupt handler(VEGA20)
+ */
+static void vega20_ih_reroute_ih(struct amdgpu_device *adev)
+{
+ uint32_t tmp;
+
+ /* vega20 ih reroute will go through psp
+ * this function is only used for arcturus
+ */
+ if (adev->asic_type == CHIP_ARCTURUS) {
+ /* Reroute to IH ring 1 for VMC */
+ WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x12);
+ tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
+ tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, CLIENT_TYPE, 1);
+ tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
+ WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
+
+ /* Reroute IH ring 1 for UTCL2 */
+ WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x1B);
+ tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
+ tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
+ WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
+ }
+}
+
/**
* vega20_ih_irq_init - init and enable the interrupt ring
*
@@ -289,6 +321,8 @@ static int vega20_ih_irq_init(struct amdgpu_device *adev)
for (i = 0; i < ARRAY_SIZE(ih); i++) {
if (ih[i]->ring_size) {
+ if (i == 1)
+ vega20_ih_reroute_ih(adev);
ret = vega20_ih_enable_ring(adev, ih[i]);
if (ret)
return ret;
--
2.17.1
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