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From e76984e73744952153922b2fad73a66aaa7e2479 Mon Sep 17 00:00:00 2001
From: Frank Min <Frank.Min@amd.com>
Date: Fri, 27 Apr 2018 03:44:11 +0800
Subject: [PATCH 0376/2940] drm/amdgpu: add vega20 sriov capability detection
Add sriov capability detection for vega20, then can check if device is
virtual device.
Signed-off-by: Frank Min <Frank.Min@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
index 2e65447637c6..f8cee95d61cc 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
@@ -205,8 +205,19 @@ static const struct nbio_hdp_flush_reg nbio_v7_4_hdp_flush_reg = {
static void nbio_v7_4_detect_hw_virt(struct amdgpu_device *adev)
{
- if (is_virtual_machine()) /* passthrough mode exclus sriov mod */
- adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
+ uint32_t reg;
+
+ reg = RREG32_SOC15(NBIO, 0, mmRCC_IOV_FUNC_IDENTIFIER);
+ if (reg & 1)
+ adev->virt.caps |= AMDGPU_SRIOV_CAPS_IS_VF;
+
+ if (reg & 0x80000000)
+ adev->virt.caps |= AMDGPU_SRIOV_CAPS_ENABLE_IOV;
+
+ if (!reg) {
+ if (is_virtual_machine()) /* passthrough mode exclus sriov mod */
+ adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
+ }
}
static void nbio_v7_4_init_registers(struct amdgpu_device *adev)
--
2.17.1
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