From: Xiaojie Yuan xiaojie.yuan@amd.com
commit 210b3b3c7563df391bd81d49c51af303b928de4a upstream.
This patch fixes 2nd baco reset failure with gfxoff enabled on navi1x.
clear state buffer (resides in vram) is corrupted after 1st baco reset, upon gfxoff exit, CPF gets garbage header in CSIB and hangs.
Signed-off-by: Xiaojie Yuan xiaojie.yuan@amd.com Reviewed-by: Hawking Zhang Hawking.Zhang@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 43 ++++++++++++++++++++++++++++----- 1 file changed, 37 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c @@ -1785,27 +1785,52 @@ static void gfx_v10_0_enable_gui_idle_in WREG32_SOC15(GC, 0, mmCP_INT_CNTL_RING0, tmp); }
-static void gfx_v10_0_init_csb(struct amdgpu_device *adev) +static int gfx_v10_0_init_csb(struct amdgpu_device *adev) { + int r; + + if (adev->in_gpu_reset) { + r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, false); + if (r) + return r; + + r = amdgpu_bo_kmap(adev->gfx.rlc.clear_state_obj, + (void **)&adev->gfx.rlc.cs_ptr); + if (!r) { + adev->gfx.rlc.funcs->get_csb_buffer(adev, + adev->gfx.rlc.cs_ptr); + amdgpu_bo_kunmap(adev->gfx.rlc.clear_state_obj); + } + + amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj); + if (r) + return r; + } + /* csib */ WREG32_SOC15(GC, 0, mmRLC_CSIB_ADDR_HI, adev->gfx.rlc.clear_state_gpu_addr >> 32); WREG32_SOC15(GC, 0, mmRLC_CSIB_ADDR_LO, adev->gfx.rlc.clear_state_gpu_addr & 0xfffffffc); WREG32_SOC15(GC, 0, mmRLC_CSIB_LENGTH, adev->gfx.rlc.clear_state_size); + + return 0; }
-static void gfx_v10_0_init_pg(struct amdgpu_device *adev) +static int gfx_v10_0_init_pg(struct amdgpu_device *adev) { int i; + int r;
- gfx_v10_0_init_csb(adev); + r = gfx_v10_0_init_csb(adev); + if (r) + return r;
for (i = 0; i < adev->num_vmhubs; i++) amdgpu_gmc_flush_gpu_tlb(adev, 0, i, 0);
/* TODO: init power gating */ - return; + return 0; }
void gfx_v10_0_rlc_stop(struct amdgpu_device *adev) @@ -1907,7 +1932,10 @@ static int gfx_v10_0_rlc_resume(struct a r = gfx_v10_0_wait_for_rlc_autoload_complete(adev); if (r) return r; - gfx_v10_0_init_pg(adev); + + r = gfx_v10_0_init_pg(adev); + if (r) + return r;
/* enable RLC SRM */ gfx_v10_0_rlc_enable_srm(adev); @@ -1933,7 +1961,10 @@ static int gfx_v10_0_rlc_resume(struct a return r; }
- gfx_v10_0_init_pg(adev); + r = gfx_v10_0_init_pg(adev); + if (r) + return r; + adev->gfx.rlc.funcs->start(adev);
if (adev->firmware.load_type == AMDGPU_FW_LOAD_RLC_BACKDOOR_AUTO) {