It is to solve RDMA performance issue.
Change-Id: I441d2943e504e2ef7d33de0e8773a0f9b8fdb2ca
Signed-off-by: Eric Huang <jinhuieric.hu...@amd.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 46 ++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index 5085b36..7e59bc8 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -771,6 +771,47 @@ static int vega20_init_smc_table(struct pp_hwmgr *hwmgr)
return 0;
}
+static int vega20_override_pcie_parameters(struct pp_hwmgr *hwmgr)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+ uint32_t pcie_speed = 0, pcie_width = 0, pcie_arg;
+ int ret;
+
+ if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4)
+ pcie_speed = 16;
+ else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)
+ pcie_speed = 8;
+ else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2)
+ pcie_speed = 5;
+ else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1)
+ pcie_speed = 2;
+
+ if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X32)
+ pcie_width = 32;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X16)
+ pcie_width = 16;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X12)
+ pcie_width = 12;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X8)
+ pcie_width = 8;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X4)
+ pcie_width = 4;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X2)
+ pcie_width = 2;
+ else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X1)
+ pcie_width = 1;
+
+ pcie_arg = pcie_width | (pcie_speed << 8);
+
+ ret = smum_send_msg_to_smc_with_parameter(hwmgr,
+ PPSMC_MSG_OverridePcieParameters, pcie_arg);
+ PP_ASSERT_WITH_CODE(!ret,
+ "[OverridePcieParameters] Attempt to override pcie params
failed!",
+ return ret);
+
+ return 0;
+}
+
static int vega20_set_allowed_featuresmask(struct pp_hwmgr *hwmgr)
{
struct vega20_hwmgr *data =
@@ -1570,6 +1611,11 @@ static int vega20_enable_dpm_tasks(struct pp_hwmgr
*hwmgr)
"[EnableDPMTasks] Failed to initialize SMC table!",
return result);
+ result = vega20_override_pcie_parameters(hwmgr);
+ PP_ASSERT_WITH_CODE(!result,
+ "[EnableDPMTasks] Failed to override pcie parameters!",
+ return result);
+
result = vega20_run_btc(hwmgr);
PP_ASSERT_WITH_CODE(!result,
"[EnableDPMTasks] Failed to run btc!",
--
2.7.4
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