drm/amdgpu: implement umc query error count callback

umc query_ras_error_count will be invoked to query
umc correctable and uncorrectable error. It will
reset the umc ras error counter after the query.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: John Clements <John.Clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
index 05fec10..fe666ac 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
@@ -27,6 +27,13 @@
 #include "umc/umc_6_7_0_offset.h"
 #include "umc/umc_6_7_0_sh_mask.h"
 
+static inline uint32_t get_umc_v6_7_reg_offset(struct amdgpu_device *adev,
+                                             uint32_t umc_inst,
+                                             uint32_t ch_inst)
+{
+       return adev->umc.channel_offs * ch_inst + UMC_V6_7_INST_DIST * umc_inst;
+}
+
 static void umc_v6_7_query_correctable_error_count(struct amdgpu_device *adev,
                                                   uint32_t umc_reg_offset,
                                                   unsigned long *error_count)
@@ -94,6 +101,89 @@ static void umc_v6_7_querry_uncorrectable_error_count(struct amdgpu_device *adev
                *error_count += 1;
 }
 
+static void umc_v6_7_reset_error_count_per_channel(struct amdgpu_device *adev,
+                                                  uint32_t umc_reg_offset)
+{
+       uint32_t ecc_err_cnt_addr;
+       uint32_t ecc_err_cnt_sel, ecc_err_cnt_sel_addr;
+
+       ecc_err_cnt_sel_addr =
+               SOC15_REG_OFFSET(UMC, 0,
+                               regUMCCH0_0_EccErrCntSel);
+       ecc_err_cnt_addr =
+               SOC15_REG_OFFSET(UMC, 0,
+                               regUMCCH0_0_EccErrCnt);
+
+       /* select the lower chip */
+       ecc_err_cnt_sel = RREG32_PCIE((ecc_err_cnt_sel_addr +
+                                      umc_reg_offset) * 4);
+       ecc_err_cnt_sel = REG_SET_FIELD(ecc_err_cnt_sel,
+                                       UMCCH0_0_EccErrCntSel,
+                                       EccErrCntCsSel, 0);
+       WREG32_PCIE((ecc_err_cnt_sel_addr + umc_reg_offset) * 4,
+                       ecc_err_cnt_sel);
+
+       /* clear lower chip error count */
+       WREG32_PCIE((ecc_err_cnt_addr + umc_reg_offset) * 4,
+                       UMC_V6_7_CE_CNT_INIT);
+
+       /* select the higher chip */
+       ecc_err_cnt_sel = RREG32_PCIE((ecc_err_cnt_sel_addr +
+                                       umc_reg_offset) * 4);
+       ecc_err_cnt_sel = REG_SET_FIELD(ecc_err_cnt_sel,
+                                       UMCCH0_0_EccErrCntSel,
+                                       EccErrCntCsSel, 1);
+       WREG32_PCIE((ecc_err_cnt_sel_addr + umc_reg_offset) * 4,
+                       ecc_err_cnt_sel);
+
+       /* clear higher chip error count */
+       WREG32_PCIE((ecc_err_cnt_addr + umc_reg_offset) * 4,
+                       UMC_V6_7_CE_CNT_INIT);
+}
+
+static void umc_v6_7_reset_error_count(struct amdgpu_device *adev)
+{
+       uint32_t umc_inst        = 0;
+       uint32_t ch_inst         = 0;
+       uint32_t umc_reg_offset  = 0;
+
+       LOOP_UMC_INST_AND_CH(umc_inst, ch_inst) {
+               umc_reg_offset = get_umc_v6_7_reg_offset(adev,
+                                                        umc_inst,
+                                                        ch_inst);
+
+               umc_v6_7_reset_error_count_per_channel(adev,
+                                                      umc_reg_offset);
+       }
+}
+
+static void umc_v6_7_query_ras_error_count(struct amdgpu_device *adev,
+                                          void *ras_error_status)
+{
+       struct ras_err_data *err_data = (struct ras_err_data *)ras_error_status;
+
+       uint32_t umc_inst        = 0;
+       uint32_t ch_inst         = 0;
+       uint32_t umc_reg_offset  = 0;
+
+       /*TODO: driver needs to toggle DF Cstate to ensure
+        * safe access of UMC registers. Will add the protection */
+       LOOP_UMC_INST_AND_CH(umc_inst, ch_inst) {
+               umc_reg_offset = get_umc_v6_7_reg_offset(adev,
+                                                        umc_inst,
+                                                        ch_inst);
+               umc_v6_7_query_correctable_error_count(adev,
+                                                      umc_reg_offset,
+                                                      &(err_data->ce_count));
+               umc_v6_7_querry_uncorrectable_error_count(adev,
+                                                         umc_reg_offset,
+                                                         &(err_data->ue_count));
+       }
+
+       umc_v6_7_reset_error_count(adev);
+}
+
 const struct amdgpu_umc_funcs umc_v6_7_funcs = {
        .ras_late_init = amdgpu_umc_ras_late_init,
+       .query_ras_error_count = umc_v6_7_query_ras_error_count,
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.h b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.h
index 6b88122..e59dbdb 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.h
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.h
@@ -30,6 +30,8 @@
 /* umc ce count initial value */
 #define UMC_V6_7_CE_CNT_INIT   (UMC_V6_7_CE_CNT_MAX - UMC_V6_7_CE_INT_THRESHOLD)
 
+#define UMC_V6_7_INST_DIST     0x40000
+
 extern const struct amdgpu_umc_funcs umc_v6_7_funcs;
 
 #endif