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path: root/drivers/crypto/ccree/cc_debugfs.c (follow)
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2020-05-15crypto: ccree - constify struct debugfs_reg32Rikard Falkeborn1-2/+2
pid_cd_regs and debug_regs are never changed and can therefore be made const. This allows the compiler to put it in the text section instead of the data section. Before: text data bss dec hex filename 2871 2320 64 5255 1487 drivers/crypto/ccree/cc_debugfs.o After: text data bss dec hex filename 3255 1936 64 5255 1487 drivers/crypto/ccree/cc_debugfs.o Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-22crypto: ccree - remove struct cc_debugfs_ctxGeert Uytterhoeven1-20/+7
The cc_debugfs_ctx structure contains only a single member, and only one instance exists. Simplify the code and reduce memory consumption by moving this member to struct cc_drvdata. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-02-22crypto: ccree - fix debugfs register access while suspendedGeert Uytterhoeven1-0/+2
Reading the debugfs files under /sys/kernel/debug/ccree/ can be done by the user at any time. On R-Car SoCs, the CCREE device is power-managed using a moduile clock, and if this clock is not running, bogus register values may be read. Fix this by filling in the debugfs_regset32.dev field, so debugfs will make sure the device is resumed while its registers are being read. This fixes the bogus values (0x00000260) in the register dumps on R-Car H3 ES1.0: -e6601000.crypto/regs:HOST_IRR = 0x00000260 -e6601000.crypto/regs:HOST_POWER_DOWN_EN = 0x00000260 +e6601000.crypto/regs:HOST_IRR = 0x00000038 +e6601000.crypto/regs:HOST_POWER_DOWN_EN = 0x00000038 e6601000.crypto/regs:AXIM_MON_ERR = 0x00000000 e6601000.crypto/regs:DSCRPTR_QUEUE_CONTENT = 0x000002aa -e6601000.crypto/regs:HOST_IMR = 0x00000260 +e6601000.crypto/regs:HOST_IMR = 0x017ffeff e6601000.crypto/regs:AXIM_CFG = 0x001f0007 e6601000.crypto/regs:AXIM_CACHE_PARAMS = 0x00000000 -e6601000.crypto/regs:GPR_HOST = 0x00000260 +e6601000.crypto/regs:GPR_HOST = 0x017ffeff e6601000.crypto/regs:AXIM_MON_COMP = 0x00000000 -e6601000.crypto/version:SIGNATURE = 0x00000260 -e6601000.crypto/version:VERSION = 0x00000260 +e6601000.crypto/version:SIGNATURE = 0xdcc63000 +e6601000.crypto/version:VERSION = 0xaf400001 Note that this behavior is system-dependent, and the issue does not show up on all R-Car Gen3 SoCs and boards. Even when the device is suspended, the module clock may be left enabled, if configured by the firmware for Secure Mode, or when controlled by the Real-Time Core. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Gilad Ben-Yossef <gilad@benyossef.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-25crypto: ccree - fix typo in debugfs error pathGilad Ben-Yossef1-1/+1
Fix a typo in debugfs interface error path which can result in a panic following a memory allocation failure. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-25crypto: ccree - add CID and PID supportGilad Ben-Yossef1-7/+37
The new HW uses a new standard product and component ID registers replacing the old ad-hoc version and signature gister schemes. Update the driver to support the new HW ID registers. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-02-01crypto: ccree - no need to check return value of debugfs_create functionsGreg Kroah-Hartman1-19/+3
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Yael Chemla <yael.chemla@foss.arm.com> Cc: Gilad Ben-Yossef <gilad@benyossef.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-By: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-31crypto: ccree - correct host regs offsetGilad Ben-Yossef1-2/+5
The product signature and HW revision register have different offset on the older HW revisions. This fixes the problem of the driver failing sanity check on silicon despite working on the FPGA emulation systems. Fixes: 27b3b22dd98c ("crypto: ccree - add support for older HW revs") Cc: stable@vger.kernel.org Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-02-15crypto: ccree - introduce CryptoCell driverGilad Ben-Yossef1-0/+101
Introduce basic low level Arm TrustZone CryptoCell HW support. This first patch doesn't actually register any Crypto API transformations, these will follow up in the next patch. This first revision supports the CC 712 REE component. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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