lkml.org 
[lkml]   [2014]   [Dec]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/5] MIPS: OCTEON: reintroduce crypto features check
Date
Reintroduce run-time check for crypto features. The old one was deleted
because it was unreliable, now decide the crypto availability on early
boot when the model string is constructed.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
---
arch/mips/cavium-octeon/executive/octeon-model.c | 6 ++++++
arch/mips/include/asm/octeon/octeon-feature.h | 17 +++++++++++++++--
2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/arch/mips/cavium-octeon/executive/octeon-model.c b/arch/mips/cavium-octeon/executive/octeon-model.c
index e15b049..b2104bd 100644
--- a/arch/mips/cavium-octeon/executive/octeon-model.c
+++ b/arch/mips/cavium-octeon/executive/octeon-model.c
@@ -27,6 +27,9 @@

#include <asm/octeon/octeon.h>

+enum octeon_feature_bits __octeon_feature_bits __read_mostly;
+EXPORT_SYMBOL_GPL(__octeon_feature_bits);
+
/**
* Read a byte of fuse data
* @byte_addr: address to read
@@ -103,6 +106,9 @@ static const char *__init octeon_model_get_string_buffer(uint32_t chip_id,
else
suffix = "NSP";

+ if (!fus_dat2.s.nocrypto)
+ __octeon_feature_bits |= OCTEON_HAS_CRYPTO;
+
/*
* Assume pass number is encoded using <5:3><2:0>. Exceptions
* will be fixed later.
diff --git a/arch/mips/include/asm/octeon/octeon-feature.h b/arch/mips/include/asm/octeon/octeon-feature.h
index c4fe81f..8ebd3f57 100644
--- a/arch/mips/include/asm/octeon/octeon-feature.h
+++ b/arch/mips/include/asm/octeon/octeon-feature.h
@@ -46,8 +46,6 @@ enum octeon_feature {
OCTEON_FEATURE_SAAD,
/* Does this Octeon support the ZIP offload engine? */
OCTEON_FEATURE_ZIP,
- /* Does this Octeon support crypto acceleration using COP2? */
- OCTEON_FEATURE_CRYPTO,
OCTEON_FEATURE_DORM_CRYPTO,
/* Does this Octeon support PCI express? */
OCTEON_FEATURE_PCIE,
@@ -86,6 +84,21 @@ enum octeon_feature {
OCTEON_MAX_FEATURE
};

+enum octeon_feature_bits {
+ OCTEON_HAS_CRYPTO = 0x0001, /* Crypto acceleration using COP2 */
+};
+extern enum octeon_feature_bits __octeon_feature_bits;
+
+/**
+ * octeon_has_crypto() - Check if this OCTEON has crypto acceleration support.
+ *
+ * Returns: Non-zero if the feature exists. Zero if the feature does not exist.
+ */
+static inline int octeon_has_crypto(void)
+{
+ return __octeon_feature_bits & OCTEON_HAS_CRYPTO;
+}
+
/**
* Determine if the current Octeon supports a specific feature. These
* checks have been optimized to be fairly quick, but they should still
--
2.2.0


\
 
 \ /
  Last update: 2014-12-21 22:21    [W:0.041 / U:0.236 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site