[PATCH v3 4/5] drm/amdgpu: enable redirection of irq's for IH V6.0

[Sunil Khatri]

Enable redirection of irq for pagefaults for specific
clients to avoid overflow without dropping interrupts.

So here we redirect the interrupts to another IH ring
i.e ring1 where only these interrupts are processed.

Signed-off-by: Sunil Khatri <sunil.khatri at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/ih_v6_0.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/ih_v6_0.c b/drivers/gpu/drm/amd/amdgpu/ih_v6_0.c
index 26dc99232eb6..8869aac03b82 100644
--- a/drivers/gpu/drm/amd/amdgpu/ih_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/ih_v6_0.c
@@ -346,6 +346,21 @@ static int ih_v6_0_irq_init(struct amdgpu_device *adev)
 			    DELAY, 3);
 	WREG32_SOC15(OSSSYS, 0, regIH_MSI_STORM_CTRL, tmp);
 
+	/* Redirect the interrupts to IH RB1 fpr dGPU */
+	if (adev->irq.ih1.ring_size) {
+		tmp = RREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_INDEX);
+		tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_INDEX, INDEX, 0);
+		WREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_INDEX, tmp);
+
+		tmp = RREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_DATA);
+		tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA, CLIENT_ID, 0xa);
+		tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA, SOURCE_ID, 0x0);
+		tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA,
+				    SOURCE_ID_MATCH_ENABLE, 0x1);
+
+		WREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_DATA, tmp);
+	}
+
 	pci_set_master(adev->pdev);
 
 	/* enable interrupts */
-- 
2.34.1