From 22b1df28c009aaf78e77b20a9cc8d8bf98e698c8 Mon Sep 17 00:00:00 2001 From: Guchun Chen Date: Thu, 10 Feb 2022 14:34:51 +0800 Subject: [PATCH] drm/amdgpu: no rlcg legacy read in SRIOV case rlcg legacy read is not available in SRIOV configration. Otherwise, gmc_v9_0_flush_gpu_tlb will always complain timeout and finally breaks driver load. v2: bypass read in amdgpu_virt_get_rlcg_reg_access_flag (from Victor) Fixes: 97d1a3b967a3cb ("drm/amdgpu: switch to get_rlcg_reg_access_flag for gfx9") Signed-off-by: Guchun Chen Reviewed-by: Hawking Zhang Reviewed-by: Victor Skvortsov Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index e128890..6668d7f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -836,7 +836,7 @@ static bool amdgpu_virt_get_rlcg_reg_access_flag(struct amdgpu_device *adev, /* only in new version, AMDGPU_REGS_NO_KIQ and * AMDGPU_REGS_RLC are enabled simultaneously */ } else if ((acc_flags & AMDGPU_REGS_RLC) && - !(acc_flags & AMDGPU_REGS_NO_KIQ)) { + !(acc_flags & AMDGPU_REGS_NO_KIQ) && write) { *rlcg_flag = AMDGPU_RLCG_GC_WRITE_LEGACY; ret = true; } @@ -940,7 +940,7 @@ void amdgpu_sriov_wreg(struct amdgpu_device *adev, u32 rlcg_flag; if (!amdgpu_sriov_runtime(adev) && - amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, true, &rlcg_flag)) { + amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, true, &rlcg_flag)) { amdgpu_virt_rlcg_reg_rw(adev, offset, value, rlcg_flag); return; } @@ -957,7 +957,7 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev, u32 rlcg_flag; if (!amdgpu_sriov_runtime(adev) && - amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, false, &rlcg_flag)) + amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, false, &rlcg_flag)) return amdgpu_virt_rlcg_reg_rw(adev, offset, 0, rlcg_flag); if (acc_flags & AMDGPU_REGS_NO_KIQ) -- 2.7.4