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Commit 1b46c90c authored by Horia Geantă's avatar Horia Geantă Committed by Herbert Xu
Browse files

crypto: caam - convert top level drivers to libraries 



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: default avatarHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent a5e5c133

drivers/crypto/caam/Kconfig

+17 −29
Original line number Diff line number Diff line
@@ -2,6 +2,12 @@ 
config CRYPTO_DEV_FSL_CAAM_COMMON

	tristate



config CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC

	tristate



config CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC

	tristate



config CRYPTO_DEV_FSL_CAAM

	tristate "Freescale CAAM-Multicore platform driver backend"

	depends on FSL_SOC || ARCH_MXC || ARCH_LAYERSCAPE
@@ -25,7 +31,7 @@ config CRYPTO_DEV_FSL_CAAM_DEBUG 
	  Selecting this will enable printing of various debug

	  information in the CAAM driver.



config CRYPTO_DEV_FSL_CAAM_JR

menuconfig CRYPTO_DEV_FSL_CAAM_JR

	tristate "Freescale CAAM Job Ring driver backend"

	default y

	help
@@ -86,8 +92,9 @@ config CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD 
	  threshold. Range is 1-65535.



config CRYPTO_DEV_FSL_CAAM_CRYPTO_API

	tristate "Register algorithm implementations with the Crypto API"

	bool "Register algorithm implementations with the Crypto API"

	default y

	select CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC

	select CRYPTO_AEAD

	select CRYPTO_AUTHENC

	select CRYPTO_BLKCIPHER
@@ -97,13 +104,11 @@ config CRYPTO_DEV_FSL_CAAM_CRYPTO_API 
	  scatterlist crypto API (such as the linux native IPSec

	  stack) to the SEC4 via job ring.



	  To compile this as a module, choose M here: the module

	  will be called caamalg.



config CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI

	tristate "Queue Interface as Crypto API backend"

	bool "Queue Interface as Crypto API backend"

	depends on FSL_DPAA && NET

	default y

	select CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC

	select CRYPTO_AUTHENC

	select CRYPTO_BLKCIPHER

	help
@@ -114,33 +119,26 @@ config CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI 
	  assigned to the kernel should also be more than the number of

	  job rings.



	  To compile this as a module, choose M here: the module

	  will be called caamalg_qi.



config CRYPTO_DEV_FSL_CAAM_AHASH_API

	tristate "Register hash algorithm implementations with Crypto API"

	bool "Register hash algorithm implementations with Crypto API"

	default y

	select CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC

	select CRYPTO_HASH

	help

	  Selecting this will offload ahash for users of the

	  scatterlist crypto API to the SEC4 via job ring.



	  To compile this as a module, choose M here: the module

	  will be called caamhash.



config CRYPTO_DEV_FSL_CAAM_PKC_API

        tristate "Register public key cryptography implementations with Crypto API"

        bool "Register public key cryptography implementations with Crypto API"

        default y

        select CRYPTO_RSA

        help

          Selecting this will allow SEC Public key support for RSA.

          Supported cryptographic primitives: encryption, decryption,

          signature and verification.

          To compile this as a module, choose M here: the module

          will be called caam_pkc.



config CRYPTO_DEV_FSL_CAAM_RNG_API

	tristate "Register caam device for hwrng API"

	bool "Register caam device for hwrng API"

	default y

	select CRYPTO_RNG

	select HW_RANDOM
@@ -148,9 +146,6 @@ config CRYPTO_DEV_FSL_CAAM_RNG_API 
	  Selecting this will register the SEC4 hardware rng to

	  the hw_random API for suppying the kernel entropy pool.



	  To compile this as a module, choose M here: the module

	  will be called caamrng.



endif # CRYPTO_DEV_FSL_CAAM_JR



endif # CRYPTO_DEV_FSL_CAAM
@@ -160,6 +155,8 @@ config CRYPTO_DEV_FSL_DPAA2_CAAM 
	depends on FSL_MC_DPIO

	depends on NETDEVICES

	select CRYPTO_DEV_FSL_CAAM_COMMON

	select CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC

	select CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC

	select CRYPTO_BLKCIPHER

	select CRYPTO_AUTHENC

	select CRYPTO_AEAD
@@ -171,12 +168,3 @@ config CRYPTO_DEV_FSL_DPAA2_CAAM 


	  To compile this as a module, choose M here: the module

	  will be called dpaa2_caam.
 


config CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC

	def_tristate (CRYPTO_DEV_FSL_CAAM_CRYPTO_API || \

		      CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI || \

		      CRYPTO_DEV_FSL_DPAA2_CAAM)



config CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC

	def_tristate (CRYPTO_DEV_FSL_CAAM_AHASH_API || \

		      CRYPTO_DEV_FSL_DPAA2_CAAM)

drivers/crypto/caam/Makefile

+9 −9
Original line number Diff line number Diff line
@@ -11,20 +11,20 @@ ccflags-y += -DVERSION=\"\" 
obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_COMMON) += error.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_JR) += caam_jr.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += caamalg_qi.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC) += caamalg_desc.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC) += caamhash_desc.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o

obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caam_pkc.o



caam-objs := ctrl.o

caam_jr-objs := jr.o key_gen.o

caam_pkc-y := caampkc.o pkc_desc.o

caam-y := ctrl.o

caam_jr-y := jr.o key_gen.o

caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o

caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += caamalg_qi.o

caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o

caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o

caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caampkc.o pkc_desc.o



caam-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += qi.o

ifneq ($(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI),)

	ccflags-y += -DCONFIG_CAAM_QI

	caam-objs += qi.o

endif



obj-$(CONFIG_CRYPTO_DEV_FSL_DPAA2_CAAM) += dpaa2_caam.o

drivers/crypto/caam/caamalg.c

+3 −40
Original line number Diff line number Diff line
@@ -3471,7 +3471,7 @@ static void caam_aead_exit(struct crypto_aead *tfm) 
	caam_exit_common(crypto_aead_ctx(tfm));

}



static void __exit caam_algapi_exit(void)

void caam_algapi_exit(void)

{

	int i;
@@ -3516,43 +3516,15 @@ static void caam_aead_alg_init(struct caam_aead_alg *t_alg) 
	alg->exit = caam_aead_exit;

}



static int __init caam_algapi_init(void)

int caam_algapi_init(struct device *ctrldev)

{

	struct device_node *dev_node;

	struct platform_device *pdev;

	struct caam_drv_private *priv;

	struct caam_drv_private *priv = dev_get_drvdata(ctrldev);

	int i = 0, err = 0;

	u32 aes_vid, aes_inst, des_inst, md_vid, md_inst, ccha_inst, ptha_inst;

	u32 arc4_inst;

	unsigned int md_limit = SHA512_DIGEST_SIZE;

	bool registered = false, gcm_support;



	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;

	}



	priv = dev_get_drvdata(&pdev->dev);

	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;

	}





	/*

	 * Register crypto algorithms the device supports.

	 * First, detect presence and attributes of DES, AES, and MD blocks.
@@ -3695,14 +3667,5 @@ static int __init caam_algapi_init(void) 
	if (registered)

		pr_info("caam algorithms registered in /proc/crypto\n");



out_put_dev:

	put_device(&pdev->dev);

	return err;

}
 


module_init(caam_algapi_init);

module_exit(caam_algapi_exit);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("FSL CAAM support for crypto API");

MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");

drivers/crypto/caam/caamalg_qi.c

+4 −41
Original line number Diff line number Diff line
@@ -2492,7 +2492,7 @@ static void caam_aead_exit(struct crypto_aead *tfm) 
	caam_exit_common(crypto_aead_ctx(tfm));

}



static void __exit caam_qi_algapi_exit(void)

void caam_qi_algapi_exit(void)

{

	int i;
@@ -2537,45 +2537,17 @@ static void caam_aead_alg_init(struct caam_aead_alg *t_alg) 
	alg->exit = caam_aead_exit;

}



static int __init caam_qi_algapi_init(void)

int caam_qi_algapi_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);

	int i = 0, err = 0;

	u32 aes_vid, aes_inst, des_inst, md_vid, md_inst;

	unsigned int md_limit = SHA512_DIGEST_SIZE;

	bool registered = false;



	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);

	of_node_put(dev_node);

	if (!pdev)

		return -ENODEV;



	ctrldev = &pdev->dev;

	priv = dev_get_drvdata(ctrldev);



	/*

	 * 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 || !priv->qi_present) {

		err = -ENODEV;

		goto out_put_dev;

	}



	if (caam_dpaa2) {

		dev_info(ctrldev, "caam/qi frontend driver not suitable for DPAA 2.x, aborting...\n");

		err = -ENODEV;

		goto out_put_dev;

		return -ENODEV;

	}



	/*
@@ -2688,14 +2660,5 @@ static int __init caam_qi_algapi_init(void) 
	if (registered)

		dev_info(priv->qidev, "algorithms registered in /proc/crypto\n");



out_put_dev:

	put_device(ctrldev);

	return err;

}
 


module_init(caam_qi_algapi_init);

module_exit(caam_qi_algapi_exit);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Support for crypto API using CAAM-QI backend");

MODULE_AUTHOR("Freescale Semiconductor");

drivers/crypto/caam/caamhash.c

+5 −43
Original line number Diff line number Diff line
@@ -1933,7 +1933,7 @@ static void caam_hash_cra_exit(struct crypto_tfm *tfm) 
	caam_jr_free(ctx->jrdev);

}



static void __exit caam_algapi_hash_exit(void)

void caam_algapi_hash_exit(void)

{

	struct caam_hash_alg *t_alg, *n;
@@ -1991,40 +1991,13 @@ caam_hash_alloc(struct caam_hash_template *template, 
	return t_alg;

}



static int __init caam_algapi_hash_init(void)

int caam_algapi_hash_init(struct device *ctrldev)

{

	struct device_node *dev_node;

	struct platform_device *pdev;

	int i = 0, err = 0;

	struct caam_drv_private *priv;

	struct caam_drv_private *priv = dev_get_drvdata(ctrldev);

	unsigned int md_limit = SHA512_DIGEST_SIZE;

	u32 md_inst, md_vid;



	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;

	}



	priv = dev_get_drvdata(&pdev->dev);

	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;

	}



	/*

	 * Register crypto algorithms the device supports.  First, identify

	 * presence and attributes of MD block.
@@ -2045,10 +2018,8 @@ static int __init caam_algapi_hash_init(void) 
	 * Skip registration of any hashing algorithms if MD block

	 * is not present.

	 */

	if (!md_inst) {

		err = -ENODEV;

		goto out_put_dev;

	}

	if (!md_inst)

		return -ENODEV;



	/* Limit digest size based on LP256 */

	if (md_vid == CHA_VER_VID_MD_LP256)
@@ -2105,14 +2076,5 @@ static int __init caam_algapi_hash_init(void) 
			list_add_tail(&t_alg->entry, &hash_list);

	}



out_put_dev:

	put_device(&pdev->dev);

	return err;

}
 


module_init(caam_algapi_hash_init);

module_exit(caam_algapi_hash_exit);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("FSL CAAM support for ahash functions of crypto API");

MODULE_AUTHOR("Freescale Semiconductor - NMG");