[PATCH] drm/amdgpu: enable 48-bit IH timestamp counter

[Alex Sierra]

By default this timestamp is based on a 32 bit counter.
This is used by the amdgpu_gmc_filter_faults, to
avoid process the same interrupt in retry configuration.
Apparently there's a problem when the timestamp coming from
IH overflows and compares against timestamp coming from the
the hash table.
This patch only extends the time overflow from 10 minutes to
aprx 455 days.

Signed-off-by: Alex Sierra <alex.sierra at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/navi10_ih.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
index 837769fcb35b..bda916f33805 100644
--- a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
@@ -94,6 +94,8 @@ static void navi10_ih_enable_interrupts(struct amdgpu_device *adev)
 
 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 1);
 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 1);
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
+				   RB_GPU_TS_ENABLE, 1);
 	if (amdgpu_sriov_vf(adev) && adev->asic_type < CHIP_NAVI10) {
 		if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL, ih_rb_cntl)) {
 			DRM_ERROR("PSP program IH_RB_CNTL failed!\n");
@@ -109,6 +111,8 @@ static void navi10_ih_enable_interrupts(struct amdgpu_device *adev)
 		ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING1);
 		ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING1,
 					   RB_ENABLE, 1);
+		ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING1,
+					   RB_GPU_TS_ENABLE, 1);
 		if (amdgpu_sriov_vf(adev) && adev->asic_type < CHIP_NAVI10) {
 			if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING1,
 						ih_rb_cntl)) {
@@ -125,6 +129,8 @@ static void navi10_ih_enable_interrupts(struct amdgpu_device *adev)
 		ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL_RING2);
 		ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING2,
 					   RB_ENABLE, 1);
+		ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING2,
+					   RB_GPU_TS_ENABLE, 1);
 		if (amdgpu_sriov_vf(adev) && adev->asic_type < CHIP_NAVI10) {
 			if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING2,
 						ih_rb_cntl)) {
-- 
2.17.1