From: Ruchika Gupta Date: Fri, 25 Oct 2013 06:31:03 +0000 (+0530) Subject: crypto: caam - Modify the interface layers to use JR API's X-Git-Tag: v3.13-rc2~35^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cfc6f11b768a9bdda17aac280474de1f0e344fea;p=platform%2Fkernel%2Flinux-exynos.git crypto: caam - Modify the interface layers to use JR API's - Earlier interface layers - caamalg, caamhash, caamrng were directly using the Controller driver private structure to access the Job ring. - Changed the above to use alloc/free API's provided by Job Ring Drive Signed-off-by: Ruchika Gupta Reviewed-by: Garg Vakul-B16394 Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c index ad9781e..4f44b71 100644 --- a/drivers/crypto/caam/caamalg.c +++ b/drivers/crypto/caam/caamalg.c @@ -86,6 +86,7 @@ #else #define debug(format, arg...) #endif +static struct list_head alg_list; /* Set DK bit in class 1 operation if shared */ static inline void append_dec_op1(u32 *desc, u32 type) @@ -2057,7 +2058,6 @@ static struct caam_alg_template driver_algs[] = { struct caam_crypto_alg { struct list_head entry; - struct device *ctrldev; int class1_alg_type; int class2_alg_type; int alg_op; @@ -2070,16 +2070,12 @@ static int caam_cra_init(struct crypto_tfm *tfm) struct caam_crypto_alg *caam_alg = container_of(alg, struct caam_crypto_alg, crypto_alg); struct caam_ctx *ctx = crypto_tfm_ctx(tfm); - struct caam_drv_private *priv = dev_get_drvdata(caam_alg->ctrldev); - struct platform_device *pdev; - int tgt_jr = atomic_inc_return(&priv->tfm_count); - /* - * distribute tfms across job rings to ensure in-order - * crypto request processing per tfm - */ - pdev = priv->jrpdev[(tgt_jr / 2) % priv->total_jobrs]; - ctx->jrdev = &pdev->dev; + ctx->jrdev = caam_jr_alloc(); + if (IS_ERR(ctx->jrdev)) { + pr_err("Job Ring Device allocation for transform failed\n"); + return PTR_ERR(ctx->jrdev); + } /* copy descriptor header template value */ ctx->class1_alg_type = OP_TYPE_CLASS1_ALG | caam_alg->class1_alg_type; @@ -2106,44 +2102,26 @@ static void caam_cra_exit(struct crypto_tfm *tfm) dma_unmap_single(ctx->jrdev, ctx->sh_desc_givenc_dma, desc_bytes(ctx->sh_desc_givenc), DMA_TO_DEVICE); + + caam_jr_free(ctx->jrdev); } static void __exit caam_algapi_exit(void) { - struct device_node *dev_node; - struct platform_device *pdev; - struct device *ctrldev; - struct caam_drv_private *priv; struct caam_crypto_alg *t_alg, *n; - 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; - } - - pdev = of_find_device_by_node(dev_node); - if (!pdev) - return; - - ctrldev = &pdev->dev; - of_node_put(dev_node); - priv = dev_get_drvdata(ctrldev); - - if (!priv->alg_list.next) + if (!alg_list.next) return; - list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { + list_for_each_entry_safe(t_alg, n, &alg_list, entry) { crypto_unregister_alg(&t_alg->crypto_alg); list_del(&t_alg->entry); kfree(t_alg); } } -static struct caam_crypto_alg *caam_alg_alloc(struct device *ctrldev, - struct caam_alg_template +static struct caam_crypto_alg *caam_alg_alloc(struct caam_alg_template *template) { struct caam_crypto_alg *t_alg; @@ -2151,7 +2129,7 @@ static struct caam_crypto_alg *caam_alg_alloc(struct device *ctrldev, t_alg = kzalloc(sizeof(struct caam_crypto_alg), GFP_KERNEL); if (!t_alg) { - dev_err(ctrldev, "failed to allocate t_alg\n"); + pr_err("failed to allocate t_alg\n"); return ERR_PTR(-ENOMEM); } @@ -2183,69 +2161,39 @@ static struct caam_crypto_alg *caam_alg_alloc(struct device *ctrldev, t_alg->class1_alg_type = template->class1_alg_type; t_alg->class2_alg_type = template->class2_alg_type; t_alg->alg_op = template->alg_op; - t_alg->ctrldev = ctrldev; return t_alg; } static int __init caam_algapi_init(void) { - struct device_node *dev_node; - struct platform_device *pdev; - struct device *ctrldev; - struct caam_drv_private *priv; int i = 0, err = 0; - 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) - 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) - return -ENODEV; - - INIT_LIST_HEAD(&priv->alg_list); - - atomic_set(&priv->tfm_count, -1); + INIT_LIST_HEAD(&alg_list); /* register crypto algorithms the device supports */ for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { /* TODO: check if h/w supports alg */ struct caam_crypto_alg *t_alg; - t_alg = caam_alg_alloc(ctrldev, &driver_algs[i]); + t_alg = caam_alg_alloc(&driver_algs[i]); if (IS_ERR(t_alg)) { err = PTR_ERR(t_alg); - dev_warn(ctrldev, "%s alg allocation failed\n", - driver_algs[i].driver_name); + pr_warn("%s alg allocation failed\n", + driver_algs[i].driver_name); continue; } err = crypto_register_alg(&t_alg->crypto_alg); if (err) { - dev_warn(ctrldev, "%s alg registration failed\n", + pr_warn("%s alg registration failed\n", t_alg->crypto_alg.cra_driver_name); kfree(t_alg); } else - list_add_tail(&t_alg->entry, &priv->alg_list); + list_add_tail(&t_alg->entry, &alg_list); } - if (!list_empty(&priv->alg_list)) - dev_info(ctrldev, "%s algorithms registered in /proc/crypto\n", - (char *)of_get_property(dev_node, "compatible", NULL)); + if (!list_empty(&alg_list)) + pr_info("caam algorithms registered in /proc/crypto\n"); return err; } diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 91a9354..0378328 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -94,6 +94,9 @@ #define debug(format, arg...) #endif + +static struct list_head hash_list; + /* ahash per-session context */ struct caam_hash_ctx { struct device *jrdev; @@ -1653,7 +1656,6 @@ static struct caam_hash_template driver_hash[] = { struct caam_hash_alg { struct list_head entry; - struct device *ctrldev; int alg_type; int alg_op; struct ahash_alg ahash_alg; @@ -1670,7 +1672,6 @@ static int caam_hash_cra_init(struct crypto_tfm *tfm) struct caam_hash_alg *caam_hash = container_of(alg, struct caam_hash_alg, ahash_alg); struct caam_hash_ctx *ctx = crypto_tfm_ctx(tfm); - struct caam_drv_private *priv = dev_get_drvdata(caam_hash->ctrldev); /* Sizes for MDHA running digests: MD5, SHA1, 224, 256, 384, 512 */ static const u8 runninglen[] = { HASH_MSG_LEN + MD5_DIGEST_SIZE, HASH_MSG_LEN + SHA1_DIGEST_SIZE, @@ -1678,17 +1679,17 @@ static int caam_hash_cra_init(struct crypto_tfm *tfm) HASH_MSG_LEN + SHA256_DIGEST_SIZE, HASH_MSG_LEN + 64, HASH_MSG_LEN + SHA512_DIGEST_SIZE }; - int tgt_jr = atomic_inc_return(&priv->tfm_count); int ret = 0; - struct platform_device *pdev; /* - * distribute tfms across job rings to ensure in-order + * Get a Job ring from Job Ring driver to ensure in-order * crypto request processing per tfm */ - pdev = priv->jrpdev[tgt_jr % priv->total_jobrs]; - ctx->jrdev = &pdev->dev; - + ctx->jrdev = caam_jr_alloc(); + if (IS_ERR(ctx->jrdev)) { + pr_err("Job Ring Device allocation for transform failed\n"); + return PTR_ERR(ctx->jrdev); + } /* copy descriptor header template value */ ctx->alg_type = OP_TYPE_CLASS2_ALG | caam_hash->alg_type; ctx->alg_op = OP_TYPE_CLASS2_ALG | caam_hash->alg_op; @@ -1731,35 +1732,18 @@ static void caam_hash_cra_exit(struct crypto_tfm *tfm) !dma_mapping_error(ctx->jrdev, ctx->sh_desc_finup_dma)) dma_unmap_single(ctx->jrdev, ctx->sh_desc_finup_dma, desc_bytes(ctx->sh_desc_finup), DMA_TO_DEVICE); + + caam_jr_free(ctx->jrdev); } static void __exit caam_algapi_hash_exit(void) { - struct device_node *dev_node; - struct platform_device *pdev; - struct device *ctrldev; - struct caam_drv_private *priv; struct caam_hash_alg *t_alg, *n; - 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; - } - - pdev = of_find_device_by_node(dev_node); - if (!pdev) - return; - - ctrldev = &pdev->dev; - of_node_put(dev_node); - priv = dev_get_drvdata(ctrldev); - - if (!priv->hash_list.next) + if (!hash_list.next) return; - list_for_each_entry_safe(t_alg, n, &priv->hash_list, entry) { + list_for_each_entry_safe(t_alg, n, &hash_list, entry) { crypto_unregister_ahash(&t_alg->ahash_alg); list_del(&t_alg->entry); kfree(t_alg); @@ -1767,7 +1751,7 @@ static void __exit caam_algapi_hash_exit(void) } static struct caam_hash_alg * -caam_hash_alloc(struct device *ctrldev, struct caam_hash_template *template, +caam_hash_alloc(struct caam_hash_template *template, bool keyed) { struct caam_hash_alg *t_alg; @@ -1776,7 +1760,7 @@ caam_hash_alloc(struct device *ctrldev, struct caam_hash_template *template, t_alg = kzalloc(sizeof(struct caam_hash_alg), GFP_KERNEL); if (!t_alg) { - dev_err(ctrldev, "failed to allocate t_alg\n"); + pr_err("failed to allocate t_alg\n"); return ERR_PTR(-ENOMEM); } @@ -1807,44 +1791,15 @@ caam_hash_alloc(struct device *ctrldev, struct caam_hash_template *template, t_alg->alg_type = template->alg_type; t_alg->alg_op = template->alg_op; - t_alg->ctrldev = ctrldev; return t_alg; } static int __init caam_algapi_hash_init(void) { - struct device_node *dev_node; - struct platform_device *pdev; - struct device *ctrldev; - struct caam_drv_private *priv; int i = 0, err = 0; - 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) - 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) - return -ENODEV; - - INIT_LIST_HEAD(&priv->hash_list); - - atomic_set(&priv->tfm_count, -1); + INIT_LIST_HEAD(&hash_list); /* register crypto algorithms the device supports */ for (i = 0; i < ARRAY_SIZE(driver_hash); i++) { @@ -1852,38 +1807,38 @@ static int __init caam_algapi_hash_init(void) struct caam_hash_alg *t_alg; /* register hmac version */ - t_alg = caam_hash_alloc(ctrldev, &driver_hash[i], true); + t_alg = caam_hash_alloc(&driver_hash[i], true); if (IS_ERR(t_alg)) { err = PTR_ERR(t_alg); - dev_warn(ctrldev, "%s alg allocation failed\n", - driver_hash[i].driver_name); + pr_warn("%s alg allocation failed\n", + driver_hash[i].driver_name); continue; } err = crypto_register_ahash(&t_alg->ahash_alg); if (err) { - dev_warn(ctrldev, "%s alg registration failed\n", + pr_warn("%s alg registration failed\n", t_alg->ahash_alg.halg.base.cra_driver_name); kfree(t_alg); } else - list_add_tail(&t_alg->entry, &priv->hash_list); + list_add_tail(&t_alg->entry, &hash_list); /* register unkeyed version */ - t_alg = caam_hash_alloc(ctrldev, &driver_hash[i], false); + t_alg = caam_hash_alloc(&driver_hash[i], false); if (IS_ERR(t_alg)) { err = PTR_ERR(t_alg); - dev_warn(ctrldev, "%s alg allocation failed\n", - driver_hash[i].driver_name); + pr_warn("%s alg allocation failed\n", + driver_hash[i].driver_name); continue; } err = crypto_register_ahash(&t_alg->ahash_alg); if (err) { - dev_warn(ctrldev, "%s alg registration failed\n", + pr_warn("%s alg registration failed\n", t_alg->ahash_alg.halg.base.cra_driver_name); kfree(t_alg); } else - list_add_tail(&t_alg->entry, &priv->hash_list); + list_add_tail(&t_alg->entry, &hash_list); } return err; diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index 4e4ed15..28486b1 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -273,42 +273,23 @@ static struct hwrng caam_rng = { static void __exit caam_rng_exit(void) { + caam_jr_free(rng_ctx.jrdev); hwrng_unregister(&caam_rng); } static int __init caam_rng_init(void) { - struct device_node *dev_node; - struct platform_device *pdev, *jrpdev; - struct device *ctrldev; - struct caam_drv_private *priv; - - 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) - return -ENODEV; + struct device *dev; - 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) - return -ENODEV; + dev = caam_jr_alloc(); + if (IS_ERR(dev)) { + pr_err("Job Ring Device allocation for transform failed\n"); + return PTR_ERR(dev); + } - jrpdev = priv->jrpdev[0]; - caam_init_rng(&rng_ctx, &jrpdev->dev); + caam_init_rng(&rng_ctx, dev); - dev_info(&jrpdev->dev, "registering rng-caam\n"); + dev_info(dev, "registering rng-caam\n"); return hwrng_register(&caam_rng); } diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h index b781445..6d85fcc 100644 --- a/drivers/crypto/caam/intern.h +++ b/drivers/crypto/caam/intern.h @@ -83,13 +83,6 @@ struct caam_drv_private { u8 qi_present; /* Nonzero if QI present in device */ int secvio_irq; /* Security violation interrupt number */ - /* which jr allocated to scatterlist crypto */ - atomic_t tfm_count ____cacheline_aligned; - /* list of registered crypto algorithms (mk generic context handle?) */ - struct list_head alg_list; - /* list of registered hash algorithms (mk generic context handle?) */ - struct list_head hash_list; - #define RNG4_MAX_HANDLES 2 /* RNG4 block */ u32 rng4_sh_init; /* This bitmap shows which of the State