[PATCH v2 05/10] drm/amdgpu: Add helper to initialize badpage info

[Lijo Lazar]

Add a separate function to read badpage data during initialization.
Reading bad pages will need hardware access and cannot be done during
reset. Hence in cases where device needs a full reset during
init itself, attempting to read will cause a deadlock.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c    | 56 +++++++++++++++-------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h    |  4 +-
 3 files changed, 41 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 0caab1a4ae8c..4928881c13b2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2953,7 +2953,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	 * Note: theoretically, this should be called before all vram allocations
 	 * to protect retired page from abusing
 	 */
-	r = amdgpu_ras_recovery_init(adev);
+	r = amdgpu_ras_recovery_init(adev, true);
 	if (r)
 		goto init_failed;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index c7cdbd2b5adc..f5cd91fd63ea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -3146,7 +3146,42 @@ static int amdgpu_ras_page_retirement_thread(void *param)
 	return 0;
 }
 
-int amdgpu_ras_recovery_init(struct amdgpu_device *adev)
+int amdgpu_ras_init_badpage_info(struct amdgpu_device *adev)
+{
+	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+	int ret;
+
+	if (!con || amdgpu_sriov_vf(adev))
+		return 0;
+
+	ret = amdgpu_ras_eeprom_init(&con->eeprom_control);
+
+	if (ret)
+		return ret;
+
+	/* HW not usable */
+	if (amdgpu_ras_is_rma(adev))
+		return -EHWPOISON;
+
+	if (con->eeprom_control.ras_num_recs) {
+		ret = amdgpu_ras_load_bad_pages(adev);
+		if (ret)
+			return ret;
+
+		amdgpu_dpm_send_hbm_bad_pages_num(
+			adev, con->eeprom_control.ras_num_recs);
+
+		if (con->update_channel_flag == true) {
+			amdgpu_dpm_send_hbm_bad_channel_flag(
+				adev, con->eeprom_control.bad_channel_bitmap);
+			con->update_channel_flag = false;
+		}
+	}
+
+	return ret;
+}
+
+int amdgpu_ras_recovery_init(struct amdgpu_device *adev, bool init_bp_info)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_err_handler_data **data;
@@ -3187,25 +3222,10 @@ int amdgpu_ras_recovery_init(struct amdgpu_device *adev)
 	 */
 	if (adev->init_lvl->level == AMDGPU_INIT_LEVEL_MINIMAL_XGMI)
 		return 0;
-	ret = amdgpu_ras_eeprom_init(&con->eeprom_control);
-	/*
-	 * This calling fails when is_rma is true or
-	 * ret != 0.
-	 */
-	if (amdgpu_ras_is_rma(adev) || ret)
-		goto free;
-
-	if (con->eeprom_control.ras_num_recs) {
-		ret = amdgpu_ras_load_bad_pages(adev);
+	if (init_bp_info) {
+		ret = amdgpu_ras_init_badpage_info(adev);
 		if (ret)
 			goto free;
-
-		amdgpu_dpm_send_hbm_bad_pages_num(adev, con->eeprom_control.ras_num_recs);
-
-		if (con->update_channel_flag == true) {
-			amdgpu_dpm_send_hbm_bad_channel_flag(adev, con->eeprom_control.bad_channel_bitmap);
-			con->update_channel_flag = false;
-		}
 	}
 
 	mutex_init(&con->page_rsv_lock);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index 669720a9c60a..871b2d6278e0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -736,8 +736,8 @@ struct amdgpu_ras_block_hw_ops {
  * 8: feature disable
  */
 
-
-int amdgpu_ras_recovery_init(struct amdgpu_device *adev);
+int amdgpu_ras_init_badpage_info(struct amdgpu_device *adev);
+int amdgpu_ras_recovery_init(struct amdgpu_device *adev, bool init_bp_info);
 
 void amdgpu_ras_resume(struct amdgpu_device *adev);
 void amdgpu_ras_suspend(struct amdgpu_device *adev);
-- 
2.25.1