crypto: qat - add handling of compression related errors for QAT GEN4

Add logic to detect, report and handle correctable and uncorrectable
errors related to the compression hardware.
These are detected through the EXPRPSSMXLT, EXPRPSSMCPR and EXPRPSSMDCPR
registers.
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

@@ -996,13 +996,87 @@ static bool adf_handle_iaintstatssm(struct adf_accel_dev *accel_dev,
 	return reset_required;
 }
 
+static bool adf_handle_exprpssmcmpr(struct adf_accel_dev *accel_dev,
+				    void __iomem *csr)
+{
+	u32 reg = ADF_CSR_RD(csr, ADF_GEN4_EXPRPSSMCPR);
+
+	reg &= ADF_GEN4_EXPRPSSMCPR_UNCERR_BITMASK;
+	if (!reg)
+		return false;
+
+	dev_err(&GET_DEV(accel_dev),
+		"Uncorrectable error exception in SSM CMP: 0x%x", reg);
+
+	ADF_CSR_WR(csr, ADF_GEN4_EXPRPSSMCPR, reg);
+
+	return false;
+}
+
+static bool adf_handle_exprpssmxlt(struct adf_accel_dev *accel_dev,
+				   void __iomem *csr)
+{
+	u32 reg = ADF_CSR_RD(csr, ADF_GEN4_EXPRPSSMXLT);
+
+	reg &= ADF_GEN4_EXPRPSSMXLT_UNCERR_BITMASK |
+	       ADF_GEN4_EXPRPSSMXLT_CERR_BIT;
+	if (!reg)
+		return false;
+
+	if (reg & ADF_GEN4_EXPRPSSMXLT_UNCERR_BITMASK)
+		dev_err(&GET_DEV(accel_dev),
+			"Uncorrectable error exception in SSM XLT: 0x%x", reg);
+
+	if (reg & ADF_GEN4_EXPRPSSMXLT_CERR_BIT)
+		dev_warn(&GET_DEV(accel_dev),
+			 "Correctable error exception in SSM XLT: 0x%x", reg);
+
+	ADF_CSR_WR(csr, ADF_GEN4_EXPRPSSMXLT, reg);
+
+	return false;
+}
+
+static bool adf_handle_exprpssmdcpr(struct adf_accel_dev *accel_dev,
+				    void __iomem *csr)
+{
+	u32 reg;
+	int i;
+
+	for (i = 0; i < ADF_GEN4_DCPR_SLICES_NUM; i++) {
+		reg = ADF_CSR_RD(csr, ADF_GEN4_EXPRPSSMDCPR(i));
+		reg &= ADF_GEN4_EXPRPSSMDCPR_UNCERR_BITMASK |
+		       ADF_GEN4_EXPRPSSMDCPR_CERR_BITMASK;
+		if (!reg)
+			continue;
+
+		if (reg & ADF_GEN4_EXPRPSSMDCPR_UNCERR_BITMASK)
+			dev_err(&GET_DEV(accel_dev),
+				"Uncorrectable error exception in SSM DCMP: 0x%x", reg);
+
+		if (reg & ADF_GEN4_EXPRPSSMDCPR_CERR_BITMASK)
+			dev_warn(&GET_DEV(accel_dev),
+				 "Correctable error exception in SSM DCMP: 0x%x", reg);
+
+		ADF_CSR_WR(csr, ADF_GEN4_EXPRPSSMDCPR(i), reg);
+	}
+
+	return false;
+}
+
 static bool adf_handle_ssm(struct adf_accel_dev *accel_dev, void __iomem *csr,
 			   u32 errsou)
 {
+	bool reset_required;
+
 	if (!(errsou & ADF_GEN4_ERRSOU2_SSM_ERR_BIT))
 		return false;
 
-	return adf_handle_iaintstatssm(accel_dev, csr);
+	reset_required = adf_handle_iaintstatssm(accel_dev, csr);
+	reset_required |= adf_handle_exprpssmcmpr(accel_dev, csr);
+	reset_required |= adf_handle_exprpssmxlt(accel_dev, csr);
+	reset_required |= adf_handle_exprpssmdcpr(accel_dev, csr);
+
+	return reset_required;
 }
 
 static bool adf_handle_cpp_cfc_err(struct adf_accel_dev *accel_dev,

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

@@ -523,6 +523,82 @@ struct adf_ras_ops;
 #define ADF_GEN4_CPP_CFC_ERR_PPID_LO			0x640C0C
 #define ADF_GEN4_CPP_CFC_ERR_PPID_HI			0x640C10
 
+/* Exception reporting in QAT SSM CMP */
+#define ADF_GEN4_EXPRPSSMCPR				0x2000
+
+/*
+ * Uncorrectable error mask in EXPRPSSMCPR
+ * BIT(2) - Hard fatal error
+ * BIT(16) - Parity error detected in CPR Push FIFO
+ * BIT(17) - Parity error detected in CPR Pull FIFO
+ * BIT(18) - Parity error detected in CPR Hash Table
+ * BIT(19) - Parity error detected in CPR History Buffer Copy 0
+ * BIT(20) - Parity error detected in CPR History Buffer Copy 1
+ * BIT(21) - Parity error detected in CPR History Buffer Copy 2
+ * BIT(22) - Parity error detected in CPR History Buffer Copy 3
+ * BIT(23) - Parity error detected in CPR History Buffer Copy 4
+ * BIT(24) - Parity error detected in CPR History Buffer Copy 5
+ * BIT(25) - Parity error detected in CPR History Buffer Copy 6
+ * BIT(26) - Parity error detected in CPR History Buffer Copy 7
+ */
+#define ADF_GEN4_EXPRPSSMCPR_UNCERR_BITMASK \
+	(BIT(2) | BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(20) | \
+	 BIT(21) | BIT(22) | BIT(23) | BIT(24) | BIT(25) | BIT(26))
+
+/* Exception reporting in QAT SSM XLT */
+#define ADF_GEN4_EXPRPSSMXLT				0xA000
+
+/*
+ * Uncorrectable error mask in EXPRPSSMXLT
+ * BIT(2) - If set, an Uncorrectable Error event occurred
+ * BIT(16) - Parity error detected in XLT Push FIFO
+ * BIT(17) - Parity error detected in XLT Pull FIFO
+ * BIT(18) - Parity error detected in XLT HCTB0
+ * BIT(19) - Parity error detected in XLT HCTB1
+ * BIT(20) - Parity error detected in XLT HCTB2
+ * BIT(21) - Parity error detected in XLT HCTB3
+ * BIT(22) - Parity error detected in XLT CBCL
+ * BIT(23) - Parity error detected in XLT LITPTR
+ */
+#define ADF_GEN4_EXPRPSSMXLT_UNCERR_BITMASK \
+	(BIT(2) | BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(20) | BIT(21) | \
+	 BIT(22) | BIT(23))
+
+/*
+ * Correctable error mask in EXPRPSSMXLT
+ * BIT(3) - Correctable error event occurred.
+ */
+#define ADF_GEN4_EXPRPSSMXLT_CERR_BIT			BIT(3)
+
+/* Exception reporting in QAT SSM DCMP */
+#define ADF_GEN4_EXPRPSSMDCPR(_n_) (0x12000 + (_n_) * 0x80)
+
+/*
+ * Uncorrectable error mask in EXPRPSSMDCPR
+ * BIT(2) - Even hard fatal error
+ * BIT(4) - Odd hard fatal error
+ * BIT(6) - decode soft error
+ * BIT(16) - Parity error detected in CPR Push FIFO
+ * BIT(17) - Parity error detected in CPR Pull FIFO
+ * BIT(18) - Parity error detected in the Input Buffer
+ * BIT(19) - symbuf0parerr
+ *	     Parity error detected in CPR Push FIFO
+ * BIT(20) - symbuf1parerr
+ *	     Parity error detected in CPR Push FIFO
+ */
+#define ADF_GEN4_EXPRPSSMDCPR_UNCERR_BITMASK \
+	(BIT(2) | BIT(4) | BIT(6) | BIT(16) | BIT(17) | \
+	 BIT(18) | BIT(19) | BIT(20))
+
+/*
+ * Correctable error mask in EXPRPSSMDCPR
+ * BIT(3) - Even ecc correctable error
+ * BIT(5) - Odd ecc correctable error
+ */
+#define ADF_GEN4_EXPRPSSMDCPR_CERR_BITMASK		(BIT(3) | BIT(5))
+
+#define ADF_GEN4_DCPR_SLICES_NUM			3
+
 /* Command Parity error detected on IOSFP Command to QAT */
 #define ADF_GEN4_RIMISCSTS_BIT				BIT(0)