[Artful][PATCH 6/7] crypto/nx: Add P9 NX specific error codes for 842 engine

[Gustavo Walbon]

From: Haren Myneni <haren at linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1718292

This patch adds changes for checking P9 specific 842 engine
error codes. These errros are reported in coprocessor status
block (CSB) for failures.

Signed-off-by: Haren Myneni <haren at us.ibm.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
(cherry picked from commit 146e9f1b65478643f2729a97ccb8be60bb4492e5)
Signed-off-by: Gustavo Walbon <gwalbon at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/icswx.h   |  3 +++
 drivers/crypto/nx/nx-842-powernv.c | 18 ++++++++++++++++++
 drivers/crypto/nx/nx-842.h         |  8 ++++++++
 3 files changed, 29 insertions(+)

diff --git a/arch/powerpc/include/asm/icswx.h b/arch/powerpc/include/asm/icswx.h
index 27e588f6c72e..6a2c87577541 100644
--- a/arch/powerpc/include/asm/icswx.h
+++ b/arch/powerpc/include/asm/icswx.h
@@ -69,7 +69,10 @@ struct coprocessor_completion_block {
 #define CSB_CC_WR_PROTECTION	(16)
 #define CSB_CC_UNKNOWN_CODE	(17)
 #define CSB_CC_ABORT		(18)
+#define CSB_CC_EXCEED_BYTE_COUNT	(19)	/* P9 or later */
 #define CSB_CC_TRANSPORT	(20)
+#define CSB_CC_INVALID_CRB	(21)	/* P9 or later */
+#define CSB_CC_INVALID_DDE	(30)	/* P9 or later */
 #define CSB_CC_SEGMENTED_DDL	(31)
 #define CSB_CC_PROGRESS_POINT	(32)
 #define CSB_CC_DDE_OVERFLOW	(33)
diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c
index 829b5cad0043..c0dd4c7e17d3 100644
--- a/drivers/crypto/nx/nx-842-powernv.c
+++ b/drivers/crypto/nx/nx-842-powernv.c
@@ -243,6 +243,13 @@ static int wait_for_csb(struct nx842_workmem *wmem,
 	case CSB_CC_TEMPL_OVERFLOW:
 		CSB_ERR(csb, "Compressed data template shows data past end");
 		return -EINVAL;
+	case CSB_CC_EXCEED_BYTE_COUNT:	/* P9 or later */
+		/*
+		 * DDE byte count exceeds the limit specified in Maximum
+		 * byte count register.
+		 */
+		CSB_ERR(csb, "DDE byte count exceeds the limit");
+		return -EINVAL;
 
 	/* these should not happen */
 	case CSB_CC_INVALID_ALIGN:
@@ -284,9 +291,17 @@ static int wait_for_csb(struct nx842_workmem *wmem,
 		CSB_ERR(csb, "Too many DDEs in DDL");
 		return -EINVAL;
 	case CSB_CC_TRANSPORT:
+	case CSB_CC_INVALID_CRB:	/* P9 or later */
 		/* shouldn't happen, we setup CRB correctly */
 		CSB_ERR(csb, "Invalid CRB");
 		return -EINVAL;
+	case CSB_CC_INVALID_DDE:	/* P9 or later */
+		/*
+		 * shouldn't happen, setup_direct/indirect_dde creates
+		 * DDE right
+		 */
+		CSB_ERR(csb, "Invalid DDE");
+		return -EINVAL;
 	case CSB_CC_SEGMENTED_DDL:
 		/* shouldn't happen, setup_ddl creates DDL right */
 		CSB_ERR(csb, "Segmented DDL error");
@@ -330,6 +345,9 @@ static int wait_for_csb(struct nx842_workmem *wmem,
 	case CSB_CC_HW:
 		CSB_ERR(csb, "Correctable hardware error");
 		return -EPROTO;
+	case CSB_CC_HW_EXPIRED_TIMER:	/* P9 or later */
+		CSB_ERR(csb, "Job did not finish within allowed time");
+		return -EPROTO;
 
 	default:
 		CSB_ERR(csb, "Invalid CC %d", csb->cc);
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h
index 30929bd7d1a9..bb2f31792683 100644
--- a/drivers/crypto/nx/nx-842.h
+++ b/drivers/crypto/nx/nx-842.h
@@ -76,9 +76,17 @@
 #define CSB_CC_DECRYPT_OVERFLOW	(64)
 /* asym crypt codes */
 #define CSB_CC_MINV_OVERFLOW	(128)
+/*
+ * HW error - Job did not finish in the maximum time allowed.
+ * Job terminated.
+ */
+#define CSB_CC_HW_EXPIRED_TIMER		(224)
 /* These are reserved for hypervisor use */
 #define CSB_CC_HYP_RESERVE_START	(240)
 #define CSB_CC_HYP_RESERVE_END		(253)
+#define CSB_CC_HYP_RESERVE_P9_END	(251)
+/* No valid interrupt server (P9 or later). */
+#define CSB_CC_HYP_RESERVE_NO_INTR_SERVER	(252)
 #define CSB_CC_HYP_NO_HW		(254)
 #define CSB_CC_HYP_HANG_ABORTED		(255)
 
-- 
2.13.3