From f0c6b79bfc9216bf0e4e35389d4e3e4fc7bbc2ad Mon Sep 17 00:00:00 2001
From: Sunil Khatri <sunil.khatri@amd.com>
Date: Wed, 3 Jul 2024 23:04:11 +0530
Subject: [PATCH] drm/amdgpu: enable redirection of irq's for IH v7.0
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@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@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 548b3c63a7659..6852081fcff21 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 */
--
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