]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
drm/amdgpu/nbio7.4: add hw bug workaround for vega20
authorAlex Deucher <alexander.deucher@amd.com>
Wed, 19 Dec 2018 23:05:41 +0000 (18:05 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 20 Dec 2018 17:12:17 +0000 (12:12 -0500)
Configure PCIE_CI_CNTL to work around a hw bug that affects
some multi-GPU compute workloads.

Acked-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c

index f8cee95d61cc164e605289043d1ec31db424e617..4cd31a276dcd29a29cc2187d54ffff4ce083d170 100644 (file)
@@ -31,6 +31,7 @@
 
 #define smnCPM_CONTROL                                                                                  0x11180460
 #define smnPCIE_CNTL2                                                                                   0x11180070
+#define smnPCIE_CI_CNTL                                                                                 0x11180080
 
 static u32 nbio_v7_4_get_rev_id(struct amdgpu_device *adev)
 {
@@ -222,7 +223,13 @@ static void nbio_v7_4_detect_hw_virt(struct amdgpu_device *adev)
 
 static void nbio_v7_4_init_registers(struct amdgpu_device *adev)
 {
+       uint32_t def, data;
+
+       def = data = RREG32_PCIE(smnPCIE_CI_CNTL);
+       data = REG_SET_FIELD(data, PCIE_CI_CNTL, CI_SLV_ORDERING_DIS, 1);
 
+       if (def != data)
+               WREG32_PCIE(smnPCIE_CI_CNTL, data);
 }
 
 const struct amdgpu_nbio_funcs nbio_v7_4_funcs = {