linux-kernel - [PATCH v2 3/5] crypto: hisilicon/sgl

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Date:   Tue, 30 Mar 2021 15:39:04 +0800
From:   Kai Ye <yekai13@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <yekai13@...wei.com>
Subject: [PATCH v2 3/5] crypto: hisilicon/sgl - add some dfx logs

Add some dfx logs in some abnormal exit situations.

Signed-off-by: Kai Ye <yekai13@...wei.com>
---
 drivers/crypto/hisilicon/sgl.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/hisilicon/sgl.c b/drivers/crypto/hisilicon/sgl.c
index b816e74..4bece3d 100644
--- a/drivers/crypto/hisilicon/sgl.c
+++ b/drivers/crypto/hisilicon/sgl.c
@@ -87,8 +87,10 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev,
 		block[i].sgl = dma_alloc_coherent(dev, block_size,
 						  &block[i].sgl_dma,
 						  GFP_KERNEL);
-		if (!block[i].sgl)
+		if (!block[i].sgl) {
+			dev_err(dev, "Fail to allocate hw SG buffer!\n");
 			goto err_free_mem;
+		}
 
 		block[i].size = block_size;
 	}
@@ -97,8 +99,10 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev,
 		block[i].sgl = dma_alloc_coherent(dev, remain_sgl * sgl_size,
 						  &block[i].sgl_dma,
 						  GFP_KERNEL);
-		if (!block[i].sgl)
+		if (!block[i].sgl) {
+			dev_err(dev, "Fail to allocate remained hw SG buffer!\n");
 			goto err_free_mem;
+		}
 
 		block[i].size = remain_sgl * sgl_size;
 	}
@@ -213,16 +217,19 @@ hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
 	sg_n = sg_nents(sgl);
 
 	sg_n_mapped = dma_map_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
-	if (!sg_n_mapped)
+	if (!sg_n_mapped) {
+		dev_err(dev, "DMA mapping for SG error!\n");
 		return ERR_PTR(-EINVAL);
+	}
 
 	if (sg_n_mapped > pool->sge_nr) {
-		dma_unmap_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
+		dev_err(dev, "the number of entries in input scatterlist is bigger than SGL pool setting.\n");
 		return ERR_PTR(-EINVAL);
 	}
 
 	curr_hw_sgl = acc_get_sgl(pool, index, &curr_sgl_dma);
 	if (IS_ERR(curr_hw_sgl)) {
+		dev_err(dev, "Get SGL error!\n");
 		dma_unmap_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
 		return ERR_PTR(-ENOMEM);
 
-- 
2.8.1