[PATCH 1/2] drm/amdgpu: add vega20 sriov capability detection

[Deucher, Alexander]

Series is:

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Xiangliang Yu <Xiangliang.Yu at amd.com>
Sent: Tuesday, September 18, 2018 5:56:03 AM
To: amd-gfx at lists.freedesktop.org
Cc: Yu, Xiangliang; Min, Frank
Subject: [PATCH 1/2] drm/amdgpu: add vega20 sriov capability detection

From: Frank Min <Frank.Min at amd.com>

Add sriov capability detection for vega20, then can check if device is
virtual device.

Signed-off-by: Frank Min <Frank.Min at amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu at 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 2e65447..f8cee95 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)
--
2.7.4

_______________________________________________
amd-gfx mailing list
amd-gfx at lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
amd-gfx Info Page - freedesktop.org<https://lists.freedesktop.org/mailman/listinfo/amd-gfx>
lists.freedesktop.org
To see the collection of prior postings to the list, visit the amd-gfx Archives.. Using amd-gfx: To post a message to all the list members, send email to amd-gfx at lists.freedesktop.org. You can subscribe to the list, or change your existing subscription, in the sections below.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20180918/61d1b219/attachment.html>