diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index b47422b0b5b1..74b4349e345a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -40,6 +40,11 @@ #define smnPCS_GOPX1_PCS_ERROR_STATUS 0x12200210 #define smnPCS_GOPX1_PCS_ERROR_NONCORRECTABLE_MASK 0x12200218 +#define XGMI_STATE_DISABLE 0xD1 +#define XGMI_STATE_LS0 0x81 +#define XGMI_LINK_ACTIVE 1 +#define XGMI_LINK_INACTIVE 0 + static DEFINE_MUTEX(xgmi_mutex); #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4 @@ -289,6 +294,42 @@ static const struct amdgpu_pcs_ras_field xgmi3x16_pcs_ras_fields[] = { SOC15_REG_FIELD(PCS_XGMI3X16_PCS_ERROR_STATUS, RxCMDPktErr)}, }; +static u32 xgmi_v6_4_get_link_status(struct amdgpu_device *adev, int global_link_num) +{ + const u32 smnpcs_xgmi3x16_pcs_state_hist1 = 0x11a00070; + const int xgmi_inst = 2; + u32 link_inst; + u64 addr; + + link_inst = global_link_num % xgmi_inst; + + addr = (smnpcs_xgmi3x16_pcs_state_hist1 | (link_inst << 20)) + + adev->asic_funcs->encode_ext_smn_addressing(global_link_num / xgmi_inst); + + return RREG32_PCIE_EXT(addr); +} + +int amdgpu_get_xgmi_link_status(struct amdgpu_device *adev, int global_link_num) +{ + u32 xgmi_state_reg_val; + + switch (amdgpu_ip_version(adev, XGMI_HWIP, 0)) { + case IP_VERSION(6, 4, 0): + xgmi_state_reg_val = xgmi_v6_4_get_link_status(adev, global_link_num); + break; + default: + return -EOPNOTSUPP; + } + + if ((xgmi_state_reg_val & 0xFF) == XGMI_STATE_DISABLE) + return -ENOLINK; + + if ((xgmi_state_reg_val & 0xFF) == XGMI_STATE_LS0) + return XGMI_LINK_ACTIVE; + + return XGMI_LINK_INACTIVE; +} + /** * DOC: AMDGPU XGMI Support * |