crypto: qat - add reporting of correctable errors for QAT GEN4

Add logic to detect and report correctable errors in QAT GEN4
devices.
This includes (1) enabling, disabling and handling error reported
through the ERRSOU0 register and (2) logic to log the errors
in the system log.
Signed-off-by: Shashank Gupta <shashank.gupta@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Tero Kristo <tero.kristo@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_gen4_ras.c

 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright(c) 2023 Intel Corporation */
 #include "adf_common_drv.h"
+#include "adf_gen4_hw_data.h"
 #include "adf_gen4_ras.h"
 
+static void enable_errsou_reporting(void __iomem *csr)
+{
+	/* Enable correctable error reporting in ERRSOU0 */
+	ADF_CSR_WR(csr, ADF_GEN4_ERRMSK0, 0);
+}
+
+static void disable_errsou_reporting(void __iomem *csr)
+{
+	/* Disable correctable error reporting in ERRSOU0 */
+	ADF_CSR_WR(csr, ADF_GEN4_ERRMSK0, ADF_GEN4_ERRSOU0_BIT);
+}
+
+static void enable_ae_error_reporting(struct adf_accel_dev *accel_dev,
+				      void __iomem *csr)
+{
+	u32 ae_mask = GET_HW_DATA(accel_dev)->ae_mask;
+
+	/* Enable Acceleration Engine correctable error reporting */
+	ADF_CSR_WR(csr, ADF_GEN4_HIAECORERRLOGENABLE_CPP0, ae_mask);
+}
+
+static void disable_ae_error_reporting(void __iomem *csr)
+{
+	/* Disable Acceleration Engine correctable error reporting */
+	ADF_CSR_WR(csr, ADF_GEN4_HIAECORERRLOGENABLE_CPP0, 0);
+}
+
 static void adf_gen4_enable_ras(struct adf_accel_dev *accel_dev)
 {
+	void __iomem *csr = adf_get_pmisc_base(accel_dev);
+
+	enable_errsou_reporting(csr);
+	enable_ae_error_reporting(accel_dev, csr);
 }
 
 static void adf_gen4_disable_ras(struct adf_accel_dev *accel_dev)
 {
+	void __iomem *csr = adf_get_pmisc_base(accel_dev);
+
+	disable_errsou_reporting(csr);
+	disable_ae_error_reporting(csr);
+}
+
+static void adf_gen4_process_errsou0(struct adf_accel_dev *accel_dev,
+				     void __iomem *csr)
+{
+	u32 aecorrerr = ADF_CSR_RD(csr, ADF_GEN4_HIAECORERRLOG_CPP0);
+
+	aecorrerr &= GET_HW_DATA(accel_dev)->ae_mask;
+
+	dev_warn(&GET_DEV(accel_dev),
+		 "Correctable error detected in AE: 0x%x\n",
+		 aecorrerr);
+
+	/* Clear interrupt from ERRSOU0 */
+	ADF_CSR_WR(csr, ADF_GEN4_HIAECORERRLOG_CPP0, aecorrerr);
 }
 
 static bool adf_gen4_handle_interrupt(struct adf_accel_dev *accel_dev,
 				      bool *reset_required)
 {
-	return false;
+	void __iomem *csr = adf_get_pmisc_base(accel_dev);
+	u32 errsou = ADF_CSR_RD(csr, ADF_GEN4_ERRSOU0);
+	bool handled = false;
+
+	*reset_required = false;
+
+	if (errsou & ADF_GEN4_ERRSOU0_BIT) {
+		adf_gen4_process_errsou0(accel_dev, csr);
+		handled = true;
+	}
+
+	return handled;
 }
 
 void adf_gen4_init_ras_ops(struct adf_ras_ops *ras_ops)

drivers/crypto/intel/qat/qat_common/adf_gen4_ras.h

@@ -3,8 +3,19 @@
 #ifndef ADF_GEN4_RAS_H_
 #define ADF_GEN4_RAS_H_
 
+#include <linux/bits.h>
+
 struct adf_ras_ops;
 
+/* ERRSOU0 Correctable error mask*/
+#define ADF_GEN4_ERRSOU0_BIT				BIT(0)
+
+/* HI AE Correctable error log */
+#define ADF_GEN4_HIAECORERRLOG_CPP0			0x41A308
+
+/* HI AE Correctable error log enable */
+#define ADF_GEN4_HIAECORERRLOGENABLE_CPP0		0x41A318
+
 void adf_gen4_init_ras_ops(struct adf_ras_ops *ras_ops);
 
 #endif /* ADF_GEN4_RAS_H_ */