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SubjectRe: [PATCH v2 1/5] crypto: ccree: correct host regs offset
On Thu, May 24, 2018 at 03:19:06PM +0100, Gilad Ben-Yossef wrote:
> 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")

Did the above introduce a regression that is fixed by this patch
or did it add a feature that only works with this patch?

In the case of the latter I would drop the Fixes tag,
but I don't feel strongly about it.

> Cc: stable@vger.kernel.org
> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>

Minor not below not withstanding,

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>

> ---
> drivers/crypto/ccree/cc_debugfs.c | 7 +++++--
> drivers/crypto/ccree/cc_driver.c | 8 ++++++--
> drivers/crypto/ccree/cc_driver.h | 2 ++
> drivers/crypto/ccree/cc_host_regs.h | 6 ++++--
> 4 files changed, 17 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/crypto/ccree/cc_debugfs.c b/drivers/crypto/ccree/cc_debugfs.c
> index 08f8db4..5ca184e 100644
> --- a/drivers/crypto/ccree/cc_debugfs.c
> +++ b/drivers/crypto/ccree/cc_debugfs.c
> @@ -26,7 +26,8 @@ struct cc_debugfs_ctx {
> static struct dentry *cc_debugfs_dir;
>
> static struct debugfs_reg32 debug_regs[] = {
> - CC_DEBUG_REG(HOST_SIGNATURE),
> + { .name = "SIGNATURE" }, /* Must be 0th */
> + { .name = "VERSION" }, /* Must be 1st */
> CC_DEBUG_REG(HOST_IRR),
> CC_DEBUG_REG(HOST_POWER_DOWN_EN),
> CC_DEBUG_REG(AXIM_MON_ERR),
> @@ -34,7 +35,6 @@ static struct debugfs_reg32 debug_regs[] = {
> CC_DEBUG_REG(HOST_IMR),
> CC_DEBUG_REG(AXIM_CFG),
> CC_DEBUG_REG(AXIM_CACHE_PARAMS),
> - CC_DEBUG_REG(HOST_VERSION),
> CC_DEBUG_REG(GPR_HOST),
> CC_DEBUG_REG(AXIM_MON_COMP),
> };
> @@ -58,6 +58,9 @@ int cc_debugfs_init(struct cc_drvdata *drvdata)
> struct debugfs_regset32 *regset;
> struct dentry *file;
>
> + debug_regs[0].offset = drvdata->sig_offset;
> + debug_regs[1].offset = drvdata->ver_offset;
> +
> ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> if (!ctx)
> return -ENOMEM;
> diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
> index 89ce013..6f93ce7 100644
> --- a/drivers/crypto/ccree/cc_driver.c
> +++ b/drivers/crypto/ccree/cc_driver.c
> @@ -207,9 +207,13 @@ static int init_cc_resources(struct platform_device *plat_dev)
> if (hw_rev->rev >= CC_HW_REV_712) {
> new_drvdata->hash_len_sz = HASH_LEN_SIZE_712;
> new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP);
> + new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_712);
> + new_drvdata->ver_offset = CC_REG(HOST_VERSION_712);
> } else {
> new_drvdata->hash_len_sz = HASH_LEN_SIZE_630;
> new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP8);
> + new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_630);
> + new_drvdata->ver_offset = CC_REG(HOST_VERSION_630);
> }
>
> platform_set_drvdata(plat_dev, new_drvdata);
> @@ -276,7 +280,7 @@ static int init_cc_resources(struct platform_device *plat_dev)
> }
>
> /* Verify correct mapping */
> - signature_val = cc_ioread(new_drvdata, CC_REG(HOST_SIGNATURE));
> + signature_val = cc_ioread(new_drvdata, new_drvdata->sig_offset);
> if (signature_val != hw_rev->sig) {
> dev_err(dev, "Invalid CC signature: SIGNATURE=0x%08X != expected=0x%08X\n",
> signature_val, hw_rev->sig);
> @@ -287,7 +291,7 @@ static int init_cc_resources(struct platform_device *plat_dev)
>
> /* Display HW versions */
> dev_info(dev, "ARM CryptoCell %s Driver: HW version 0x%08X, Driver version %s\n",
> - hw_rev->name, cc_ioread(new_drvdata, CC_REG(HOST_VERSION)),
> + hw_rev->name, cc_ioread(new_drvdata, new_drvdata->ver_offset),
> DRV_MODULE_VERSION);
>
> rc = init_cc_regs(new_drvdata, true);
> diff --git a/drivers/crypto/ccree/cc_driver.h b/drivers/crypto/ccree/cc_driver.h
> index 2048fde..95f82b2 100644
> --- a/drivers/crypto/ccree/cc_driver.h
> +++ b/drivers/crypto/ccree/cc_driver.h
> @@ -129,6 +129,8 @@ struct cc_drvdata {

This patch doesn't make things (much) worse
but struct cc_drvdata has a rather incomplete kdoc.

> enum cc_hw_rev hw_rev;
> u32 hash_len_sz;
> u32 axim_mon_offset;
> + u32 sig_offset;
> + u32 ver_offset;
> };
>
> struct cc_crypto_alg {
> diff --git a/drivers/crypto/ccree/cc_host_regs.h b/drivers/crypto/ccree/cc_host_regs.h
> index f510018..616b2e1 100644
> --- a/drivers/crypto/ccree/cc_host_regs.h
> +++ b/drivers/crypto/ccree/cc_host_regs.h
> @@ -45,7 +45,8 @@
> #define CC_HOST_ICR_DSCRPTR_WATERMARK_QUEUE0_CLEAR_BIT_SIZE 0x1UL
> #define CC_HOST_ICR_AXIM_COMP_INT_CLEAR_BIT_SHIFT 0x17UL
> #define CC_HOST_ICR_AXIM_COMP_INT_CLEAR_BIT_SIZE 0x1UL
> -#define CC_HOST_SIGNATURE_REG_OFFSET 0xA24UL
> +#define CC_HOST_SIGNATURE_712_REG_OFFSET 0xA24UL
> +#define CC_HOST_SIGNATURE_630_REG_OFFSET 0xAC8UL
> #define CC_HOST_SIGNATURE_VALUE_BIT_SHIFT 0x0UL
> #define CC_HOST_SIGNATURE_VALUE_BIT_SIZE 0x20UL
> #define CC_HOST_BOOT_REG_OFFSET 0xA28UL
> @@ -105,7 +106,8 @@
> #define CC_HOST_BOOT_ONLY_ENCRYPT_LOCAL_BIT_SIZE 0x1UL
> #define CC_HOST_BOOT_AES_EXISTS_LOCAL_BIT_SHIFT 0x1EUL
> #define CC_HOST_BOOT_AES_EXISTS_LOCAL_BIT_SIZE 0x1UL
> -#define CC_HOST_VERSION_REG_OFFSET 0xA40UL
> +#define CC_HOST_VERSION_712_REG_OFFSET 0xA40UL
> +#define CC_HOST_VERSION_630_REG_OFFSET 0xAD8UL
> #define CC_HOST_VERSION_VALUE_BIT_SHIFT 0x0UL
> #define CC_HOST_VERSION_VALUE_BIT_SIZE 0x20UL
> #define CC_HOST_KFDE0_VALID_REG_OFFSET 0xA60UL
> --
> 2.7.4
>

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