From a7cd942bb6e3559d86257fe3b57844e55341a3a0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Horia=20Geant=C4=83?= Date: Fri, 3 May 2019 17:17:42 +0300 Subject: [PATCH] crypto: caam/qi - DMA map keys using proper device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently there is a mismatch b/w the ICID (Isolation Context ID) used for DMA mapping keys and ICID used for accessing them. -keys are DMA mapped using a job ring device, thus a job ring ICID -keys are accessed from descriptors enqueued via Queue Interface, thus using QI ICID [Note: ICIDs of JRs, QI are configured by U-boot / other entity by: -fixing up the corresponding job ring and controller DT nodes -setting up corresponding caam ICID registers] In order to avoid IOMMU faults, DMA map the key using the controller device instead of a job ring device. Signed-off-by: Horia Geantă Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamalg_qi.c | 33 ++++++++++++++++++-------------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/drivers/crypto/caam/caamalg_qi.c b/drivers/crypto/caam/caamalg_qi.c index f30959335567..c6bb804d82a8 100644 --- a/drivers/crypto/caam/caamalg_qi.c +++ b/drivers/crypto/caam/caamalg_qi.c @@ -237,7 +237,7 @@ static int aead_setkey(struct crypto_aead *aead, const u8 *key, memcpy(ctx->key, keys.authkey, keys.authkeylen); memcpy(ctx->key + ctx->adata.keylen_pad, keys.enckey, keys.enckeylen); - dma_sync_single_for_device(jrdev, ctx->key_dma, + dma_sync_single_for_device(jrdev->parent, ctx->key_dma, ctx->adata.keylen_pad + keys.enckeylen, ctx->dir); goto skip_split_key; @@ -251,8 +251,9 @@ static int aead_setkey(struct crypto_aead *aead, const u8 *key, /* postpend encryption key to auth split key */ memcpy(ctx->key + ctx->adata.keylen_pad, keys.enckey, keys.enckeylen); - dma_sync_single_for_device(jrdev, ctx->key_dma, ctx->adata.keylen_pad + - keys.enckeylen, ctx->dir); + dma_sync_single_for_device(jrdev->parent, ctx->key_dma, + ctx->adata.keylen_pad + keys.enckeylen, + ctx->dir); #ifdef DEBUG print_hex_dump(KERN_ERR, "ctx.key@" __stringify(__LINE__)": ", DUMP_PREFIX_ADDRESS, 16, 4, ctx->key, @@ -392,7 +393,8 @@ static int gcm_setkey(struct crypto_aead *aead, #endif memcpy(ctx->key, key, keylen); - dma_sync_single_for_device(jrdev, ctx->key_dma, keylen, ctx->dir); + dma_sync_single_for_device(jrdev->parent, ctx->key_dma, keylen, + ctx->dir); ctx->cdata.keylen = keylen; ret = gcm_set_sh_desc(aead); @@ -496,8 +498,8 @@ static int rfc4106_setkey(struct crypto_aead *aead, * in the nonce. Update the AES key length. */ ctx->cdata.keylen = keylen - 4; - dma_sync_single_for_device(jrdev, ctx->key_dma, ctx->cdata.keylen, - ctx->dir); + dma_sync_single_for_device(jrdev->parent, ctx->key_dma, + ctx->cdata.keylen, ctx->dir); ret = rfc4106_set_sh_desc(aead); if (ret) @@ -600,8 +602,8 @@ static int rfc4543_setkey(struct crypto_aead *aead, * in the nonce. Update the AES key length. */ ctx->cdata.keylen = keylen - 4; - dma_sync_single_for_device(jrdev, ctx->key_dma, ctx->cdata.keylen, - ctx->dir); + dma_sync_single_for_device(jrdev->parent, ctx->key_dma, + ctx->cdata.keylen, ctx->dir); ret = rfc4543_set_sh_desc(aead); if (ret) @@ -2414,6 +2416,7 @@ static int caam_init_common(struct caam_ctx *ctx, struct caam_alg_entry *caam, bool uses_dkp) { struct caam_drv_private *priv; + struct device *dev; /* * distribute tfms across job rings to ensure in-order @@ -2425,16 +2428,17 @@ static int caam_init_common(struct caam_ctx *ctx, struct caam_alg_entry *caam, return PTR_ERR(ctx->jrdev); } - priv = dev_get_drvdata(ctx->jrdev->parent); + dev = ctx->jrdev->parent; + priv = dev_get_drvdata(dev); if (priv->era >= 6 && uses_dkp) ctx->dir = DMA_BIDIRECTIONAL; else ctx->dir = DMA_TO_DEVICE; - ctx->key_dma = dma_map_single(ctx->jrdev, ctx->key, sizeof(ctx->key), + ctx->key_dma = dma_map_single(dev, ctx->key, sizeof(ctx->key), ctx->dir); - if (dma_mapping_error(ctx->jrdev, ctx->key_dma)) { - dev_err(ctx->jrdev, "unable to map key\n"); + if (dma_mapping_error(dev, ctx->key_dma)) { + dev_err(dev, "unable to map key\n"); caam_jr_free(ctx->jrdev); return -ENOMEM; } @@ -2443,7 +2447,7 @@ static int caam_init_common(struct caam_ctx *ctx, struct caam_alg_entry *caam, ctx->cdata.algtype = OP_TYPE_CLASS1_ALG | caam->class1_alg_type; ctx->adata.algtype = OP_TYPE_CLASS2_ALG | caam->class2_alg_type; - ctx->qidev = ctx->jrdev->parent; + ctx->qidev = dev; spin_lock_init(&ctx->lock); ctx->drv_ctx[ENCRYPT] = NULL; @@ -2477,7 +2481,8 @@ static void caam_exit_common(struct caam_ctx *ctx) caam_drv_ctx_rel(ctx->drv_ctx[ENCRYPT]); caam_drv_ctx_rel(ctx->drv_ctx[DECRYPT]); - dma_unmap_single(ctx->jrdev, ctx->key_dma, sizeof(ctx->key), ctx->dir); + dma_unmap_single(ctx->jrdev->parent, ctx->key_dma, sizeof(ctx->key), + ctx->dir); caam_jr_free(ctx->jrdev); } -- GitLab