[PATCH 3/3] drm/amdgpu: Correct the loss of aca bank reg info

[Ce Sun]

By polling, poll ACA bank count to ensure that valid
ACA bank reg info can be obtained

Signed-off-by: Ce Sun <cesun102 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 46 +++++++------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  2 --
 drivers/gpu/drm/amd/amdgpu/umc_v12_0.c  |  7 ----
 3 files changed, 13 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index f00a9e0c9c47..ad8ad08f0f33 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -122,7 +122,7 @@ const char *get_ras_block_str(struct ras_common_if *ras_block)
 /* typical ECC bad page rate is 1 bad page per 100MB VRAM */
 #define RAS_BAD_PAGE_COVER              (100 * 1024 * 1024ULL)
 
-#define MAX_UMC_POISON_POLLING_TIME_ASYNC  300  //ms
+#define MAX_UMC_POISON_POLLING_TIME_ASYNC  50  //ms
 
 #define AMDGPU_RAS_RETIRE_PAGE_INTERVAL 100  //ms
 
@@ -3317,8 +3317,6 @@ static void amdgpu_ras_ecc_log_init(struct ras_ecc_log_info *ecc_log)
 	mutex_init(&ecc_log->lock);
 
 	INIT_RADIX_TREE(&ecc_log->de_page_tree, GFP_KERNEL);
-	ecc_log->de_queried_count = 0;
-	ecc_log->prev_de_queried_count = 0;
 }
 
 static void amdgpu_ras_ecc_log_fini(struct ras_ecc_log_info *ecc_log)
@@ -3337,8 +3335,6 @@ static void amdgpu_ras_ecc_log_fini(struct ras_ecc_log_info *ecc_log)
 	mutex_unlock(&ecc_log->lock);
 
 	mutex_destroy(&ecc_log->lock);
-	ecc_log->de_queried_count = 0;
-	ecc_log->prev_de_queried_count = 0;
 }
 
 static bool amdgpu_ras_schedule_retirement_dwork(struct amdgpu_ras *con,
@@ -3386,49 +3382,33 @@ static int amdgpu_ras_poison_creation_handler(struct amdgpu_device *adev,
 				uint32_t poison_creation_count)
 {
 	int ret = 0;
-	struct ras_ecc_log_info *ecc_log;
 	struct ras_query_if info;
-	uint32_t timeout = 0;
+	uint32_t timeout = MAX_UMC_POISON_POLLING_TIME_ASYNC;
 	struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
-	uint64_t de_queried_count;
-	uint32_t new_detect_count, total_detect_count;
-	uint32_t need_query_count = poison_creation_count;
 	enum ras_event_type type = RAS_EVENT_TYPE_POISON_CREATION;
+	uint64_t prev_de_queried_count = 0;
+	uint64_t bank_count = 0;
 
 	memset(&info, 0, sizeof(info));
 	info.head.block = AMDGPU_RAS_BLOCK__UMC;
 
-	ecc_log = &ras->umc_ecc_log;
-	total_detect_count = 0;
 	do {
 		ret = amdgpu_ras_query_error_status_with_event(adev, &info, type);
 		if (ret)
 			return ret;
 
-		de_queried_count = ecc_log->de_queried_count;
-		if (de_queried_count > ecc_log->prev_de_queried_count) {
-			new_detect_count = de_queried_count - ecc_log->prev_de_queried_count;
-			ecc_log->prev_de_queried_count = de_queried_count;
-			timeout = 0;
+		bank_count = amdgpu_aca_get_bank_count(adev);
+		if (bank_count) {
+			prev_de_queried_count = bank_count;
+			amdgpu_aca_clear_bank_count(adev);
+			timeout = MAX_UMC_POISON_POLLING_TIME_ASYNC;
 		} else {
-			new_detect_count = 0;
-		}
-
-		if (new_detect_count) {
-			total_detect_count += new_detect_count;
-		} else {
-			if (!timeout && need_query_count)
-				timeout = MAX_UMC_POISON_POLLING_TIME_ASYNC;
-
-			if (timeout) {
-				if (!--timeout)
-					break;
-				msleep(1);
-			}
+			--timeout;
+			msleep(1);
 		}
-	} while (total_detect_count < need_query_count);
+	} while (timeout);
 
-	if (total_detect_count)
+	if (prev_de_queried_count)
 		schedule_delayed_work(&ras->page_retirement_dwork, 0);
 
 	if (amdgpu_ras_is_rma(adev) && atomic_cmpxchg(&ras->rma_in_recovery, 0, 1) == 0)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index ff63020f9c6c..132b45a362c2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -492,8 +492,6 @@ struct ras_ecc_err {
 struct ras_ecc_log_info {
 	struct mutex lock;
 	struct radix_tree_root de_page_tree;
-	uint64_t	de_queried_count;
-	uint64_t	prev_de_queried_count;
 };
 
 struct ras_critical_region {
diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/umc_v12_0.c
index e590cbdd8de9..8dbffe4d22d1 100644
--- a/drivers/gpu/drm/amd/amdgpu/umc_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v12_0.c
@@ -581,17 +581,10 @@ static int umc_v12_0_update_ecc_status(struct amdgpu_device *adev,
 
 	ret = amdgpu_umc_logs_ecc_err(adev, &con->umc_ecc_log.de_page_tree, ecc_err);
 	if (ret) {
-		if (ret == -EEXIST)
-			con->umc_ecc_log.de_queried_count++;
-		else
-			dev_err(adev->dev, "Fail to log ecc error! ret:%d\n", ret);
-
 		kfree(ecc_err);
 		return ret;
 	}
 
-	con->umc_ecc_log.de_queried_count++;
-
 	memset(page_pfn, 0, sizeof(page_pfn));
 	count = amdgpu_umc_lookup_bad_pages_in_a_row(adev,
 				pa_addr,
-- 
2.34.1