[PATCH v1 2/2] drm/amdgpu: enable redirection of irq's for IH v7.0

[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_v7_0.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
index 548b3c63a765..6852081fcff2 100644
--- a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
@@ -346,6 +346,21 @@ static int ih_v7_0_irq_init(struct amdgpu_device *adev)
 			    DELAY, 3);
 	WREG32_SOC15(OSSSYS, 0, regIH_MSI_STORM_CTRL, tmp);
 
+	/* Redirect the interrupts to IH RB1 for 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