crypto: hisilicon/qm - do not reset hardware when CE happens

mainline inclusion
from mainline-v5.12-rc1-dontuse
commit 1db0016e
category: bugfix
bugzilla: 173981
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1db0016e0d223b644d2c77a4569e8939f5c55a7c

----------------------------------------------------------------------

There is no need to reset hardware when Corrected Error(CE) happens.
Signed-off-by: NWeili Qian <qianweili@huawei.com>
Reviewed-by: NZaibo Xu <xuzaibo@huawei.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NMingqiang Ling <lingmingqiang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/crypto/hisilicon/hpre/hpre_main.c

@@ -881,6 +881,7 @@ static const struct hisi_qm_err_ini hpre_err_ini = {
 		.fe			= 0,
 		.ecc_2bits_mask		= HPRE_CORE_ECC_2BIT_ERR |
 					  HPRE_OOO_ECC_2BIT_ERR,
+		.dev_ce_mask		= HPRE_HAC_RAS_CE_ENABLE,
 		.msi_wr_port		= HPRE_WR_MSI_PORT,
 		.acpi_rst		= "HRST",
 	}

drivers/crypto/hisilicon/qm.c

@@ -1612,7 +1612,7 @@ static void qm_log_hw_error(struct hisi_qm *qm, u32 error_status)
 
 static enum acc_err_result qm_hw_error_handle_v2(struct hisi_qm *qm)
 {
-	u32 error_status, tmp;
+	u32 error_status, tmp, val;
 
 	/* read err sts */
 	tmp = readl(qm->io_base + QM_ABNORMAL_INT_STATUS);
@@ -1623,9 +1623,13 @@ static enum acc_err_result qm_hw_error_handle_v2(struct hisi_qm *qm)
 			qm->err_status.is_qm_ecc_mbit = true;
 
 		qm_log_hw_error(qm, error_status);
-		if (error_status == QM_DB_RANDOM_INVALID) {
+		val = error_status | QM_DB_RANDOM_INVALID | QM_BASE_CE;
+		/* ce error does not need to be reset */
+		if (val == (QM_DB_RANDOM_INVALID | QM_BASE_CE)) {
 			writel(error_status, qm->io_base +
 			       QM_ABNORMAL_INT_SOURCE);
+			writel(qm->err_ini->err_info.nfe,
+			       qm->io_base + QM_RAS_NFE_ENABLE);
 			return ACC_ERR_RECOVERED;
 		}
 
@@ -3317,12 +3321,19 @@ static enum acc_err_result qm_dev_err_handle(struct hisi_qm *qm)
 		if (err_sts & qm->err_ini->err_info.ecc_2bits_mask)
 			qm->err_status.is_dev_ecc_mbit = true;
 
-		if (!qm->err_ini->log_dev_hw_err) {
-			dev_err(&qm->pdev->dev, "Device doesn't support log hw error!\n");
-			return ACC_ERR_NEED_RESET;
+		if (qm->err_ini->log_dev_hw_err)
+			qm->err_ini->log_dev_hw_err(qm, err_sts);
+
+		/* ce error does not need to be reset */
+		if ((err_sts | qm->err_ini->err_info.dev_ce_mask) ==
+		     qm->err_ini->err_info.dev_ce_mask) {
+			if (qm->err_ini->clear_dev_hw_err_status)
+				qm->err_ini->clear_dev_hw_err_status(qm,
+								err_sts);
+
+			return ACC_ERR_RECOVERED;
 		}
 
-		qm->err_ini->log_dev_hw_err(qm, err_sts);
 		return ACC_ERR_NEED_RESET;
 	}
 

drivers/crypto/hisilicon/qm.h

@@ -173,6 +173,7 @@ struct hisi_qm_err_info {
 	char *acpi_rst;
 	u32 msi_wr_port;
 	u32 ecc_2bits_mask;
+	u32 dev_ce_mask;
 	u32 ce;
 	u32 nfe;
 	u32 fe;

drivers/crypto/hisilicon/sec2/sec_main.c

@@ -752,6 +752,7 @@ static const struct hisi_qm_err_ini sec_err_ini = {
 				  QM_ACC_WB_NOT_READY_TIMEOUT,
 		.fe		= 0,
 		.ecc_2bits_mask	= SEC_CORE_INT_STATUS_M_ECC,
+		.dev_ce_mask	= SEC_RAS_CE_ENB_MSK,
 		.msi_wr_port	= BIT(0),
 		.acpi_rst	= "SRST",
 	}

drivers/crypto/hisilicon/zip/zip_main.c

@@ -66,6 +66,7 @@
 #define HZIP_CORE_INT_STATUS_M_ECC	BIT(1)
 #define HZIP_CORE_SRAM_ECC_ERR_INFO	0x301148
 #define HZIP_CORE_INT_RAS_CE_ENB	0x301160
+#define HZIP_CORE_INT_RAS_CE_ENABLE	0x1
 #define HZIP_CORE_INT_RAS_NFE_ENB	0x301164
 #define HZIP_CORE_INT_RAS_FE_ENB        0x301168
 #define HZIP_CORE_INT_RAS_NFE_ENABLE	0x7FE
@@ -327,7 +328,8 @@ static void hisi_zip_hw_error_enable(struct hisi_qm *qm)
 	writel(HZIP_CORE_INT_MASK_ALL, qm->io_base + HZIP_CORE_INT_SOURCE);
 
 	/* configure error type */
-	writel(0x1, qm->io_base + HZIP_CORE_INT_RAS_CE_ENB);
+	writel(HZIP_CORE_INT_RAS_CE_ENABLE,
+	       qm->io_base + HZIP_CORE_INT_RAS_CE_ENB);
 	writel(0x0, qm->io_base + HZIP_CORE_INT_RAS_FE_ENB);
 	writel(HZIP_CORE_INT_RAS_NFE_ENABLE,
 	       qm->io_base + HZIP_CORE_INT_RAS_NFE_ENB);
@@ -727,6 +729,7 @@ static const struct hisi_qm_err_ini hisi_zip_err_ini = {
 					  QM_ACC_WB_NOT_READY_TIMEOUT,
 		.fe			= 0,
 		.ecc_2bits_mask		= HZIP_CORE_INT_STATUS_M_ECC,
+		.dev_ce_mask		= HZIP_CORE_INT_RAS_CE_ENABLE,
 		.msi_wr_port		= HZIP_WR_PORT,
 		.acpi_rst		= "ZRST",
 	}