xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: caam - convert top level drivers to libraries

Browse Source 
Currently we allow top level code, i.e. that which sits between the
low level (HW-specific) drivers and crypto API, to be built as several
drivers: caamalg, caamhash, caam_pkc, caamrng, caamalg_qi.

There is no advantage in this, more it interferes with adding support
for deferred probing (there are no corresponding devices and thus
no bus).

Convert these drivers and call init() / exit() manually at the right
time.
Move algorithms initialization at JR probe / remove time:
-the first probed JR registers the crypto algs
-the last removed JR unregisters the crypto algs

Note: caam_qi_init() is called before JR platform devices creation
(of_populate_bus()), such that QI interface is initialized when
the caam/qi algorithms are registered in the JR driver (by calling
caam_qi_algapi_init().

While here, fix the Kconfig entries under CRYPTO_DEV_FSL_CAAM_JR
to be aligned.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă
2019-05-03 17:17:39 +03:00
committed by Herbert Xu
parent a5e5c13398
commit 1b46c90c8e
10 changed files with 208 additions and 277 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/crypto/caam/caampkc.c
View File

@@ -1013,41 +1013,12 @@ static struct akcipher_alg caam_rsa = {
};
/* Public Key Cryptography module initialization handler */
static int __init caam_pkc_init(void)
int caam_pkc_init(struct device *ctrldev)
{
struct device_node *dev_node;
struct platform_device *pdev;
struct device *ctrldev;
struct caam_drv_private *priv;
struct caam_drv_private *priv = dev_get_drvdata(ctrldev);
u32 pk_inst;
int err;
dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
if (!dev_node) {
dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec4.0");
if (!dev_node)
return -ENODEV;
}
pdev = of_find_device_by_node(dev_node);
if (!pdev) {
of_node_put(dev_node);
return -ENODEV;
}
ctrldev = &pdev->dev;
priv = dev_get_drvdata(ctrldev);
of_node_put(dev_node);
/*
* If priv is NULL, it's probably because the caam driver wasn't
* properly initialized (e.g. RNG4 init failed). Thus, bail out here.
*/
if (!priv) {
err = -ENODEV;
goto out_put_dev;
}
/* Determine public key hardware accelerator presence. */
if (priv->era < 10)
pk_inst = (rd_reg32(&priv->ctrl->perfmon.cha_num_ls) &
@@ -1056,10 +1027,8 @@ static int __init caam_pkc_init(void)
pk_inst = rd_reg32(&priv->ctrl->vreg.pkha) & CHA_VER_NUM_MASK;
/* Do not register algorithms if PKHA is not present. */
if (!pk_inst) {
err = -ENODEV;
goto out_put_dev;
}
if (!pk_inst)
return 0;
err = crypto_register_akcipher(&caam_rsa);
if (err)
@@ -1068,19 +1037,10 @@ static int __init caam_pkc_init(void)
else
dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n");
out_put_dev:
put_device(ctrldev);
return err;
}
static void __exit caam_pkc_exit(void)
void caam_pkc_exit(void)
{
crypto_unregister_akcipher(&caam_rsa);
}
module_init(caam_pkc_init);
module_exit(caam_pkc_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("FSL CAAM support for PKC functions of crypto API");
MODULE_AUTHOR("Freescale Semiconductor");