Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754308AbaJXSwn (ORCPT ); Fri, 24 Oct 2014 14:52:43 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:58378 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751615AbaJXSwi (ORCPT ); Fri, 24 Oct 2014 14:52:38 -0400 Message-ID: <544A9FEA.6020304@gmail.com> Date: Fri, 24 Oct 2014 20:52:26 +0200 From: Corentin LABBE User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 MIME-Version: 1.0 To: Maxime Ripard CC: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, linux@arm.linux.org.uk, herbert@gondor.apana.org.au, davem@davemloft.net, grant.likely@linaro.org, akpm@linux-foundation.org, gregkh@linuxfoundation.org, joe@perches.com, mchehab@osg.samsung.com, crope@iki.fi, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-sunxi@googlegroups.com Subject: Re: [PATCH v5 4/4] crypto: Add Allwinner Security System crypto accelerator References: <1413728182-13569-1-git-send-email-clabbe.montjoie@gmail.com> <1413728182-13569-5-git-send-email-clabbe.montjoie@gmail.com> <20141021191149.GQ21108@lukather> In-Reply-To: <20141021191149.GQ21108@lukather> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/21/14 21:11, Maxime Ripard wrote: > Hi Corentin, > > Thanks for resending it. > > On Sun, Oct 19, 2014 at 04:16:22PM +0200, LABBE Corentin wrote: >> Add support for the Security System included in Allwinner SoC A20. >> The Security System is a hardware cryptographic accelerator that support AES/MD5/SHA1/DES/3DES/PRNG algorithms. >> >> Signed-off-by: LABBE Corentin >> --- >> drivers/crypto/Kconfig | 17 ++ >> +static int sunxi_ss_aes_poll_atomic(struct ablkcipher_request *areq) >> +{ >> + u32 spaces; >> + struct scatterlist *in_sg = areq->src; >> + struct scatterlist *out_sg = areq->dst; >> + void *src_addr; >> + void *dst_addr; >> + unsigned int ileft = areq->nbytes; >> + unsigned int oleft = areq->nbytes; >> + unsigned int todo; >> + u32 *src32; >> + u32 *dst32; >> + u32 rx_cnt = 32; >> + u32 tx_cnt = 0; >> + int i; >> + >> + src_addr = kmap_atomic(sg_page(in_sg)) + in_sg->offset; > > Where does this scatter_list is coming from? Can it even be allocated > in highmem? > With AF_ALG and cryptodev, the SG is in highmem. Verified with some PageHighMem(). >> + if (src_addr == NULL) { >> + dev_err(ss->dev, "kmap_atomic error for src SG\n"); >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return -EINVAL; >> + } >> + >> + dst_addr = kmap_atomic(sg_page(out_sg)) + out_sg->offset; >> + if (dst_addr == NULL) { >> + dev_err(ss->dev, "kmap_atomic error for dst SG\n"); >> + writel(0, ss->base + SS_CTL); >> + kunmap_atomic(src_addr); >> + mutex_unlock(&ss->lock); >> + return -EINVAL; > > Please use gotos in your error path. > Ok >> + } >> + >> + src32 = (u32 *)src_addr; >> + dst32 = (u32 *)dst_addr; >> + ileft = areq->nbytes / 4; >> + oleft = areq->nbytes / 4; >> + i = 0; >> + do { >> + if (ileft > 0 && rx_cnt > 0) { >> + todo = min(rx_cnt, ileft); >> + ileft -= todo; >> + do { >> + writel_relaxed(*src32++, > > Please put some braces around that referencing/increment. > Ok >> + ss->base + >> + SS_RXFIFO); >> + todo--; >> + } while (todo > 0); >> + } >> + if (tx_cnt > 0) { >> + todo = min(tx_cnt, oleft); >> + oleft -= todo; >> + do { >> + *dst32++ = readl_relaxed(ss->base + >> + SS_TXFIFO); >> + todo--; >> + } while (todo > 0); >> + } >> + spaces = readl_relaxed(ss->base + SS_FCSR); >> + rx_cnt = SS_RXFIFO_SPACES(spaces); >> + tx_cnt = SS_TXFIFO_SPACES(spaces); >> + } while (oleft > 0); >> + writel(0, ss->base + SS_CTL); >> + kunmap_atomic(src_addr); >> + kunmap_atomic(dst_addr); >> + mutex_unlock(&ss->lock); > > You never took that mutex in that function... > Solved with comment from Vladimir Zapolskiy >> + return 0; [] >> + int no_chunk = 1; >> + struct scatterlist *in_sg = areq->src; >> + struct scatterlist *out_sg = areq->dst; >> + >> + /* >> + * if we have only SGs with size multiple of 4, >> + * we can use the SS AES function >> + */ >> + while (in_sg != NULL && no_chunk == 1) { >> + if ((in_sg->length % 4) != 0) >> + no_chunk = 0; >> + in_sg = sg_next(in_sg); >> + } >> + while (out_sg != NULL && no_chunk == 1) { >> + if ((out_sg->length % 4) != 0) >> + no_chunk = 0; >> + out_sg = sg_next(out_sg); >> + } >> + >> + if (no_chunk == 1) >> + return sunxi_ss_aes_poll(areq, mode); >> + >> + in_sg = areq->src; >> + out_sg = areq->dst; >> + >> + nb_in_sg_rx = sg_nents(in_sg); >> + nb_in_sg_tx = sg_nents(out_sg); >> + >> + /* >> + * buf_in and buf_out are allocated only one time >> + * then we keep the buffer until driver end >> + * the allocation can only grow more >> + * we do not reduce it for simplification >> + */ >> + mutex_lock(&ss->bufin_lock); >> + if (ss->buf_in == NULL) { >> + ss->buf_in = kmalloc(areq->nbytes, GFP_KERNEL); >> + ss->buf_in_size = areq->nbytes; >> + } else { >> + if (areq->nbytes > ss->buf_in_size) { >> + kfree(ss->buf_in); >> + ss->buf_in = kmalloc(areq->nbytes, GFP_KERNEL); >> + ss->buf_in_size = areq->nbytes; >> + } >> + } >> + if (ss->buf_in == NULL) { >> + ss->buf_in_size = 0; >> + mutex_unlock(&ss->bufin_lock); >> + dev_err(ss->dev, "Unable to allocate pages.\n"); >> + return -ENOMEM; >> + } >> + mutex_lock(&ss->bufout_lock); > > What are these two mutexes used for? It looks like you're only using > them in this function. > > What would prevent you from just using the "main" lock like you did > for the AES? > I have just removed all that DES/3DES code and now I use a fallback for that case. >> + if (ss->buf_out == NULL) { >> + ss->buf_out = kmalloc(areq->nbytes, GFP_KERNEL); >> + if (ss->buf_out == NULL) { >> + ss->buf_out_size = 0; >> + mutex_unlock(&ss->bufin_lock); >> + mutex_unlock(&ss->bufout_lock); >> + dev_err(ss->dev, "Unable to allocate pages.\n"); >> + return -ENOMEM; >> + } >> + ss->buf_out_size = areq->nbytes; >> + } else { >> + if (areq->nbytes > ss->buf_out_size) { >> + kfree(ss->buf_out); >> + ss->buf_out = kmalloc(areq->nbytes, GFP_KERNEL); >> + if (ss->buf_out == NULL) { >> + ss->buf_out_size = 0; >> + mutex_unlock(&ss->bufin_lock); >> + mutex_unlock(&ss->bufout_lock); >> + dev_err(ss->dev, "Unable to allocate pages.\n"); >> + return -ENOMEM; >> + } >> + ss->buf_out_size = areq->nbytes; >> + } >> + } >> + >> + sg_copy_to_buffer(areq->src, nb_in_sg_rx, ss->buf_in, areq->nbytes); >> + >> + ir = 0; >> + it = 0; >> + mutex_lock(&ss->lock); >> + >> + for (i = 0; i < op->keylen; i += 4) >> + writel(*(op->key + i/4), ss->base + SS_KEY0 + i); >> + if (areq->info != NULL) { >> + for (i = 0; i < 4 && i < ivsize / 4; i++) { >> + v = *(u32 *)(areq->info + i * 4); >> + writel(v, ss->base + SS_IV0 + i * 4); >> + } >> + } >> + writel(mode, ss->base + SS_CTL); >> + >> + do { >> + if (rx_cnt == 0 || tx_cnt == 0) { >> + spaces = readl(ss->base + SS_FCSR); >> + rx_cnt = SS_RXFIFO_SPACES(spaces); >> + tx_cnt = SS_TXFIFO_SPACES(spaces); >> + } >> + if (rx_cnt > 0 && ir < areq->nbytes) { >> + do { >> + value = *(u32 *)(ss->buf_in + ir); >> + writel(value, ss->base + SS_RXFIFO); >> + ir += 4; >> + rx_cnt--; >> + } while (rx_cnt > 0 && ir < areq->nbytes); >> + } >> + if (tx_cnt > 0 && it < areq->nbytes) { >> + do { >> + value = readl(ss->base + SS_TXFIFO); >> + *(u32 *)(ss->buf_out + it) = value; >> + it += 4; >> + tx_cnt--; >> + } while (tx_cnt > 0 && it < areq->nbytes); >> + } >> + if (ir == areq->nbytes) { >> + mutex_unlock(&ss->bufin_lock); > > If tx_cnt <= 0 and it < areq->nbytes, your loop will stop, and you'll > not release the mutex. > Solved with the cleaning >> + ir++; >> + } >> + } while (it < areq->nbytes); >> + >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + >> + /* >> + * a simple optimization, since we dont need the hardware for this copy >> + * we release the lock and do the copy. With that we gain 5/10% perf >> + */ >> + sg_copy_from_buffer(areq->dst, nb_in_sg_tx, ss->buf_out, areq->nbytes); >> + >> + mutex_unlock(&ss->bufout_lock); >> + return 0; >> +} >> + >> +/* check and set the AES key, prepare the mode to be used */ >> +int sunxi_ss_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen) >> +{ >> + struct sunxi_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); >> + >> + switch (keylen) { >> + case 128 / 8: >> + op->keymode = SS_AES_128BITS; >> + break; >> + case 192 / 8: >> + op->keymode = SS_AES_192BITS; >> + break; >> + case 256 / 8: >> + op->keymode = SS_AES_256BITS; >> + break; >> + default: >> + dev_err(ss->dev, "ERROR: Invalid keylen %u\n", keylen); >> + crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); >> + return -EINVAL; >> + } >> + op->keylen = keylen; >> + memcpy(op->key, key, keylen); >> + return 0; >> +} >> + >> +/* check and set the DES key, prepare the mode to be used */ >> +int sunxi_ss_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen) >> +{ >> + struct sunxi_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); >> + >> + if (keylen != DES_KEY_SIZE) { >> + dev_err(ss->dev, "Invalid keylen %u\n", keylen); >> + crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); >> + return -EINVAL; >> + } >> + op->keylen = keylen; >> + memcpy(op->key, key, keylen); >> + return 0; >> +} >> + >> +/* check and set the 3DES key, prepare the mode to be used */ >> +int sunxi_ss_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen) >> +{ >> + struct sunxi_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); >> + >> + if (keylen != 3 * DES_KEY_SIZE) { >> + dev_err(ss->dev, "Invalid keylen %u\n", keylen); >> + crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); >> + return -EINVAL; >> + } >> + op->keylen = keylen; >> + memcpy(op->key, key, keylen); >> + return 0; >> +} >> diff --git a/drivers/crypto/sunxi-ss/sunxi-ss-core.c b/drivers/crypto/sunxi-ss/sunxi-ss-core.c >> new file mode 100644 >> index 0000000..e66d7e2 >> --- /dev/null >> +++ b/drivers/crypto/sunxi-ss/sunxi-ss-core.c >> @@ -0,0 +1,318 @@ >> +/* >> + * sunxi-ss-core.c - hardware cryptographic accelerator for Allwinner A20 SoC >> + * >> + * Copyright (C) 2013-2014 Corentin LABBE >> + * >> + * Core file which registers crypto algorithms supported by the SS. >> + * >> + * You could find a link for the datasheet in Documentation/arm/sunxi/README >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License as published by >> + * the Free Software Foundation; either version 2 of the License, or >> + * (at your option) any later version. >> + */ >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> + >> +#include "sunxi-ss.h" >> + >> +struct sunxi_ss_ctx *ss; >> + >> +/* >> + * General notes for whole driver: >> + * >> + * After each request the device must be disabled with a write of 0 in SS_CTL >> + * >> + * For performance reason, we use writel_relaxed/read_relaxed for all >> + * operations on RX and TX FIFO and also SS_FCSR. >> + * Excepts for the last write on TX FIFO. >> + * For all other registers, we use writel/readl. >> + * See http://permalink.gmane.org/gmane.linux.ports.arm.kernel/117644 >> + * and http://permalink.gmane.org/gmane.linux.ports.arm.kernel/117640 >> + */ > > I don't really know why that comment is here, when there's not a > single writel in this file. > It is a note from the whole driver. I do not want to duplicate that comment in others files. But now I use writesl() and that comment is now unnecessary. >> + >> +static struct ahash_alg sunxi_md5_alg = { >> + .init = sunxi_hash_init, >> + .update = sunxi_hash_update, >> + .final = sunxi_hash_final, >> + .finup = sunxi_hash_finup, >> + .digest = sunxi_hash_digest, >> + .halg = { >> + .digestsize = MD5_DIGEST_SIZE, >> + .base = { >> + .cra_name = "md5", >> + .cra_driver_name = "md5-sunxi-ss", >> + .cra_priority = 300, >> + .cra_alignmask = 3, >> + .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC, >> + .cra_blocksize = MD5_HMAC_BLOCK_SIZE, >> + .cra_ctxsize = sizeof(struct sunxi_req_ctx), >> + .cra_module = THIS_MODULE, >> + .cra_type = &crypto_ahash_type, >> + .cra_init = sunxi_hash_crainit >> + } >> + } >> +}; >> + >> +static struct ahash_alg sunxi_sha1_alg = { >> + .init = sunxi_hash_init, >> + .update = sunxi_hash_update, >> + .final = sunxi_hash_final, >> + .finup = sunxi_hash_finup, >> + .digest = sunxi_hash_digest, >> + .halg = { >> + .digestsize = SHA1_DIGEST_SIZE, >> + .base = { >> + .cra_name = "sha1", >> + .cra_driver_name = "sha1-sunxi-ss", >> + .cra_priority = 300, >> + .cra_alignmask = 3, >> + .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC, >> + .cra_blocksize = SHA1_BLOCK_SIZE, >> + .cra_ctxsize = sizeof(struct sunxi_req_ctx), >> + .cra_module = THIS_MODULE, >> + .cra_type = &crypto_ahash_type, >> + .cra_init = sunxi_hash_crainit >> + } >> + } >> +}; >> + >> +static struct crypto_alg sunxi_cipher_algs[] = { >> +{ >> + .cra_name = "cbc(aes)", >> + .cra_driver_name = "cbc-aes-sunxi-ss", >> + .cra_priority = 300, >> + .cra_blocksize = AES_BLOCK_SIZE, >> + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER, >> + .cra_ctxsize = sizeof(struct sunxi_tfm_ctx), >> + .cra_module = THIS_MODULE, >> + .cra_alignmask = 3, >> + .cra_type = &crypto_ablkcipher_type, >> + .cra_init = sunxi_ss_cipher_init, >> + .cra_u = { >> + .ablkcipher = { >> + .min_keysize = AES_MIN_KEY_SIZE, >> + .max_keysize = AES_MAX_KEY_SIZE, >> + .ivsize = AES_BLOCK_SIZE, >> + .setkey = sunxi_ss_aes_setkey, >> + .encrypt = sunxi_ss_cipher_encrypt, >> + .decrypt = sunxi_ss_cipher_decrypt, >> + } >> + } >> +}, { >> + .cra_name = "cbc(des)", >> + .cra_driver_name = "cbc-des-sunxi-ss", >> + .cra_priority = 300, >> + .cra_blocksize = DES_BLOCK_SIZE, >> + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER, >> + .cra_ctxsize = sizeof(struct sunxi_req_ctx), >> + .cra_module = THIS_MODULE, >> + .cra_alignmask = 3, >> + .cra_type = &crypto_ablkcipher_type, >> + .cra_init = sunxi_ss_cipher_init, >> + .cra_u.ablkcipher = { >> + .min_keysize = DES_KEY_SIZE, >> + .max_keysize = DES_KEY_SIZE, >> + .ivsize = DES_BLOCK_SIZE, >> + .setkey = sunxi_ss_des_setkey, >> + .encrypt = sunxi_ss_cipher_encrypt, >> + .decrypt = sunxi_ss_cipher_decrypt, >> + } >> +}, { >> + .cra_name = "cbc(des3_ede)", >> + .cra_driver_name = "cbc-des3-sunxi-ss", >> + .cra_priority = 300, >> + .cra_blocksize = DES3_EDE_BLOCK_SIZE, >> + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER, >> + .cra_ctxsize = sizeof(struct sunxi_req_ctx), >> + .cra_module = THIS_MODULE, >> + .cra_alignmask = 3, >> + .cra_type = &crypto_ablkcipher_type, >> + .cra_init = sunxi_ss_cipher_init, >> + .cra_u.ablkcipher = { >> + .min_keysize = DES3_EDE_KEY_SIZE, >> + .max_keysize = DES3_EDE_KEY_SIZE, >> + .ivsize = DES3_EDE_BLOCK_SIZE, >> + .setkey = sunxi_ss_des3_setkey, >> + .encrypt = sunxi_ss_cipher_encrypt, >> + .decrypt = sunxi_ss_cipher_decrypt, >> + } >> +} >> +}; >> + >> +static int sunxi_ss_probe(struct platform_device *pdev) >> +{ >> + struct resource *res; >> + u32 v; >> + int err; >> + unsigned long cr; >> + const unsigned long cr_ahb = 24 * 1000 * 1000; >> + const unsigned long cr_mod = 150 * 1000 * 1000; >> + >> + if (!pdev->dev.of_node) >> + return -ENODEV; >> + >> + ss = devm_kzalloc(&pdev->dev, sizeof(*ss), GFP_KERNEL); >> + if (ss == NULL) >> + return -ENOMEM; >> + >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + ss->base = devm_ioremap_resource(&pdev->dev, res); >> + if (IS_ERR(ss->base)) { >> + dev_err(&pdev->dev, "Cannot request MMIO\n"); >> + return PTR_ERR(ss->base); >> + } >> + >> + ss->ssclk = devm_clk_get(&pdev->dev, "mod"); >> + if (IS_ERR(ss->ssclk)) { >> + err = PTR_ERR(ss->ssclk); >> + dev_err(&pdev->dev, "Cannot get SS clock err=%d\n", err); >> + return err; >> + } >> + dev_dbg(&pdev->dev, "clock ss acquired\n"); >> + >> + ss->busclk = devm_clk_get(&pdev->dev, "ahb"); >> + if (IS_ERR(ss->busclk)) { >> + err = PTR_ERR(ss->busclk); >> + dev_err(&pdev->dev, "Cannot get AHB SS clock err=%d\n", err); >> + return err; >> + } >> + dev_dbg(&pdev->dev, "clock ahb_ss acquired\n"); >> + >> + /* Enable both clocks */ >> + err = clk_prepare_enable(ss->busclk); >> + if (err != 0) { >> + dev_err(&pdev->dev, "Cannot prepare_enable busclk\n"); >> + return err; >> + } >> + err = clk_prepare_enable(ss->ssclk); >> + if (err != 0) { >> + dev_err(&pdev->dev, "Cannot prepare_enable ssclk\n"); >> + clk_disable_unprepare(ss->busclk); >> + return err; >> + } >> + >> + /* >> + * Check that clock have the correct rates gived in the datasheet >> + * Try to set the clock to the maximum allowed >> + */ >> + err = clk_set_rate(ss->ssclk, cr_mod); >> + if (err != 0) { >> + dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n"); >> + clk_disable_unprepare(ss->ssclk); >> + clk_disable_unprepare(ss->busclk); >> + return err; >> + } >> + >> + cr = clk_get_rate(ss->busclk); >> + if (cr >= cr_ahb) >> + dev_dbg(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n", >> + cr, cr / 1000000, cr_ahb); >> + else >> + dev_warn(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n", >> + cr, cr / 1000000, cr_ahb); >> + >> + cr = clk_get_rate(ss->ssclk); >> + if (cr <= cr_mod) >> + if (cr < cr_mod) >> + dev_info(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n", >> + cr, cr / 1000000, cr_mod); >> + else >> + dev_dbg(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n", >> + cr, cr / 1000000, cr_mod); >> + else >> + dev_warn(&pdev->dev, "Clock ss is at %lu (%lu MHz) (must be <= %lu)\n", >> + cr, cr / 1000000, cr_mod); > > If the set_rate fails, it will return an error. All this is useless. > Ok >> + >> + /* >> + * Datasheet named it "Die Bonding ID" >> + * I expect to be a sort of Security System Revision number. >> + * Since the A80 seems to have an other version of SS >> + * this info could be useful >> + */ >> + writel(SS_ENABLED, ss->base + SS_CTL); >> + v = readl(ss->base + SS_CTL); >> + v >>= 16; >> + v &= 0x07; >> + dev_info(&pdev->dev, "Die ID %d\n", v); >> + writel(0, ss->base + SS_CTL); > > If the A80 has a different IP, it will most likely have a different > compatible anyway. You can remove that code. > >> + >> + ss->dev = &pdev->dev; >> + >> + mutex_init(&ss->lock); >> + mutex_init(&ss->bufin_lock); >> + mutex_init(&ss->bufout_lock); >> + >> + err = crypto_register_ahash(&sunxi_md5_alg); >> + if (err) >> + goto error_md5; >> + err = crypto_register_ahash(&sunxi_sha1_alg); >> + if (err) >> + goto error_sha1; >> + err = crypto_register_algs(sunxi_cipher_algs, >> + ARRAY_SIZE(sunxi_cipher_algs)); >> + if (err) >> + goto error_ciphers; >> + >> + return 0; >> +error_ciphers: >> + crypto_unregister_ahash(&sunxi_sha1_alg); >> +error_sha1: >> + crypto_unregister_ahash(&sunxi_md5_alg); >> +error_md5: >> + clk_disable_unprepare(ss->ssclk); >> + clk_disable_unprepare(ss->busclk); >> + return err; >> +} >> + >> +static int __exit sunxi_ss_remove(struct platform_device *pdev) > > The remove callback should not be in the __exit section. > > Here, that function will get removed if the driver is compiled as > built-in the remove function will not even be in the kernel > image. Which will result in an instant crash when the kernel will try > to call this function (since it's not even there anymore). > Ok >> +{ >> + if (!pdev->dev.of_node) >> + return 0; >> + >> + crypto_unregister_ahash(&sunxi_md5_alg); >> + crypto_unregister_ahash(&sunxi_sha1_alg); >> + crypto_unregister_algs(sunxi_cipher_algs, >> + ARRAY_SIZE(sunxi_cipher_algs)); >> + >> + if (ss->buf_in != NULL) >> + kfree(ss->buf_in); >> + if (ss->buf_out != NULL) >> + kfree(ss->buf_out); >> + >> + writel(0, ss->base + SS_CTL); >> + clk_disable_unprepare(ss->busclk); >> + clk_disable_unprepare(ss->ssclk); >> + return 0; >> +} >> + >> +static const struct of_device_id a20ss_crypto_of_match_table[] = { >> + { .compatible = "allwinner,sun7i-a20-crypto" }, >> + {} >> +}; >> +MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table); >> + >> +static struct platform_driver sunxi_ss_driver = { >> + .probe = sunxi_ss_probe, >> + .remove = __exit_p(sunxi_ss_remove), > > And this is why you're not seeing any warning. > >> + .driver = { >> + .owner = THIS_MODULE, > > You can drop this, it's already set by module_platform_driver. > Ok >> + .name = "sunxi-ss", >> + .of_match_table = a20ss_crypto_of_match_table, >> + }, >> +}; >> + >> +module_platform_driver(sunxi_ss_driver); >> + >> +MODULE_DESCRIPTION("Allwinner Security System cryptographic accelerator"); >> +MODULE_LICENSE("GPL"); >> +MODULE_AUTHOR("Corentin LABBE "); >> diff --git a/drivers/crypto/sunxi-ss/sunxi-ss-hash.c b/drivers/crypto/sunxi-ss/sunxi-ss-hash.c >> new file mode 100644 >> index 0000000..ec8758f >> --- /dev/null >> +++ b/drivers/crypto/sunxi-ss/sunxi-ss-hash.c >> @@ -0,0 +1,445 @@ >> +/* >> + * sunxi-ss-hash.c - hardware cryptographic accelerator for Allwinner A20 SoC >> + * >> + * Copyright (C) 2013-2014 Corentin LABBE >> + * >> + * This file add support for MD5 and SHA1. >> + * >> + * You could find the datasheet in Documentation/arm/sunxi/README >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License as published by >> + * the Free Software Foundation; either version 2 of the License, or >> + * (at your option) any later version. >> + */ >> +#include "sunxi-ss.h" >> + >> +/* This is a totaly arbitrary value */ >> +#define SS_TIMEOUT 100 >> + >> +extern struct sunxi_ss_ctx *ss; >> + >> +int sunxi_hash_crainit(struct crypto_tfm *tfm) >> +{ >> + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), >> + sizeof(struct sunxi_req_ctx)); >> + return 0; >> +} >> + >> +/* sunxi_hash_init: initialize request context */ >> +int sunxi_hash_init(struct ahash_request *areq) >> +{ >> + const char *hash_type; >> + struct sunxi_req_ctx *op = ahash_request_ctx(areq); >> + >> + memset(op, 0, sizeof(struct sunxi_req_ctx)); >> + >> + hash_type = crypto_tfm_alg_name(areq->base.tfm); >> + >> + if (strcmp(hash_type, "sha1") == 0) >> + op->mode = SS_OP_SHA1; >> + if (strcmp(hash_type, "md5") == 0) >> + op->mode = SS_OP_MD5; >> + if (op->mode == 0) >> + return -EINVAL; >> + >> + return 0; >> +} >> + >> +static u32 rx_cnt; >> + >> +inline void ss_writer(const u32 v) >> +{ >> + u32 spaces; >> + >> + writel(v, ss->base + SS_RXFIFO); >> + rx_cnt--; >> + while (rx_cnt == 0) { >> + spaces = readl_relaxed(ss->base + SS_FCSR); >> + rx_cnt = SS_RXFIFO_SPACES(spaces); >> + } >> +} > > Errrr. What?! > > Who sets that rx_cnt variable? And it persists between calls? It looks > broken. > rx_cnt was set at 0 at start of update/final functions. I have found cleaner way so that code is removed. >> +inline void ss_writer_relaxed(const u32 v) >> +{ >> + u32 spaces; >> + >> + writel_relaxed(v, ss->base + SS_RXFIFO); >> + rx_cnt--; >> + while (rx_cnt == 0) { >> + spaces = readl_relaxed(ss->base + SS_FCSR); >> + rx_cnt = SS_RXFIFO_SPACES(spaces); >> + } >> +} >> + >> +/* >> + * sunxi_hash_update: update hash engine >> + * >> + * Could be used for both SHA1 and MD5 >> + * Write data by step of 32bits and put then in the SS. >> + * >> + * Since we cannot leave partial data and hash state in the engine, >> + * we need to get the hash state at the end of this function. >> + * After some work, I have found that we can get the hash state every 64o >> + * >> + * So the first work is to get the number of bytes to write to SS modulo 64 >> + * The extra bytes will go to two different destination: >> + * op->wait for full 32bits word >> + * op->wb (waiting bytes) for partial 32 bits word >> + * So we can have up to (64/4)-1 op->wait words and 0/1/2/3 bytes in wb >> + * >> + * So at the begin of update() >> + * if op->nwait * 4 + areq->nbytes < 64 >> + * => all data writed to wait buffers and end=0 >> + * if not write all nwait to the device and position end to complete to 64o >> + * >> + * example 1: >> + * update1 60o => nwait=15 >> + * update2 60o => need one more word to have 64o >> + * end=4 >> + * so write all data in op->wait and one word of SGs >> + * write remaining data in op->wait >> + * final state op->nwait=14 >> + */ >> +int sunxi_hash_update(struct ahash_request *areq) >> +{ >> + u32 v, ivmode = 0; >> + unsigned int i = 0; >> + /* >> + * i is the total bytes read from SGs, to be compared to areq->nbytes >> + * i is important because we cannot rely on SG length since the sum of >> + * SG->length could be greater than areq->nbytes >> + */ >> + >> + struct sunxi_req_ctx *op = ahash_request_ctx(areq); >> + struct scatterlist *in_sg; >> + unsigned int in_i = 0; /* advancement in the current SG */ >> + u64 end; >> + /* >> + * end is the position when we need to stop writing to the device, >> + * to be compared to i >> + */ >> + int in_r; >> + void *src_addr; >> + >> + dev_dbg(ss->dev, "%s %s bc=%llu len=%u mode=%x bw=%u ww=%u", >> + __func__, crypto_tfm_alg_name(areq->base.tfm), >> + op->byte_count, areq->nbytes, op->mode, >> + op->nbw, op->nwait); >> + >> + if (areq->nbytes == 0) >> + return 0; >> + >> + end = ((areq->nbytes + op->nwait * 4 + op->nbw) / 64) * 64 >> + - op->nbw - op->nwait * 4; >> + >> + if (end > areq->nbytes || areq->nbytes - end > 63) { >> + dev_err(ss->dev, "ERROR: Bound error %llu %u\n", >> + end, areq->nbytes); >> + return -EINVAL; >> + } >> + >> + if (op->nwait > 0 && end > 0) { >> + /* a precedent update was done */ >> + for (i = 0; i < op->nwait; i++) { >> + ss_writer(op->wait[i]); >> + op->byte_count += 4; >> + } >> + op->nwait = 0; >> + } >> + >> + mutex_lock(&ss->lock); >> + /* >> + * if some data have been processed before, >> + * we need to restore the partial hash state >> + */ >> + if (op->byte_count > 0) { >> + ivmode = SS_IV_ARBITRARY; >> + for (i = 0; i < 5; i++) >> + writel(op->hash[i], ss->base + SS_IV0 + i * 4); >> + } >> + /* Enable the device */ >> + writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL); >> + >> + rx_cnt = 0; >> + i = 0; >> + >> + in_sg = areq->src; >> + src_addr = kmap(sg_page(in_sg)) + in_sg->offset; >> + if (src_addr == NULL) { >> + mutex_unlock(&ss->lock); >> + dev_err(ss->dev, "ERROR: Cannot kmap source buffer\n"); >> + return -EFAULT; >> + } >> + do { >> + /* >> + * step 1, if some bytes remains from last SG, >> + * try to complete them to 4 and send that word >> + */ >> + if (op->nbw > 0) { >> + while (op->nbw < 4 && i < areq->nbytes && >> + in_i < in_sg->length) { >> + op->wb |= (*(u8 *)(src_addr + in_i)) >> + << (8 * op->nbw); >> + dev_dbg(ss->dev, "%s Complete w=%d wb=%x\n", >> + __func__, op->nbw, op->wb); >> + i++; >> + in_i++; >> + op->nbw++; >> + } >> + if (op->nbw == 4) { >> + if (i <= end) { >> + ss_writer(op->wb); >> + op->byte_count += 4; >> + } else { >> + op->wait[op->nwait] = op->wb; >> + op->nwait++; >> + dev_dbg(ss->dev, "%s Keep %u bytes after %llu\n", >> + __func__, op->nwait, end); >> + } >> + op->nbw = 0; >> + op->wb = 0; >> + } >> + } >> + /* step 2, main loop, read data 4bytes at a time */ >> + while (i < areq->nbytes && in_i < in_sg->length) { >> + /* how many bytes we can read, (we need 4) */ >> + in_r = min(in_sg->length - in_i, areq->nbytes - i); >> + if (in_r < 4) { >> + /* Not enough data to write to the device */ >> + op->wb = 0; >> + while (in_r > 0) { >> + op->wb |= (*(u8 *)(src_addr + in_i)) >> + << (8 * op->nbw); >> + dev_dbg(ss->dev, "%s ending bw=%d wb=%x\n", >> + __func__, op->nbw, op->wb); >> + in_r--; >> + i++; >> + in_i++; >> + op->nbw++; >> + } >> + goto nextsg; >> + } >> + v = *(u32 *)(src_addr + in_i); >> + if (i < end) { >> + /* last write must be done without relaxed */ >> + if (i + 4 >= end) >> + ss_writer(v); >> + else >> + ss_writer_relaxed(v); >> + i += 4; >> + op->byte_count += 4; >> + in_i += 4; >> + } else { >> + op->wait[op->nwait] = v; >> + i += 4; >> + in_i += 4; >> + op->nwait++; >> + dev_dbg(ss->dev, "%s Keep word ww=%u after %llu\n", >> + __func__, op->nwait, end); >> + if (op->nwait > 15) { >> + dev_err(ss->dev, "FATAL: Cannot enqueue more, bug?\n"); >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return -EIO; >> + } >> + } >> + } >> +nextsg: >> + /* Nothing more to read in this SG */ >> + if (in_i == in_sg->length) { >> + kunmap(sg_page(in_sg)); >> + do { >> + in_sg = sg_next(in_sg); >> + } while (in_sg != NULL && in_sg->length == 0); >> + in_i = 0; >> + if (in_sg != NULL) { >> + src_addr = kmap(sg_page(in_sg)) + in_sg->offset; >> + if (src_addr == NULL) { >> + mutex_unlock(&ss->lock); >> + dev_err(ss->dev, "ERROR: Cannot kmap source buffer\n"); >> + return -EFAULT; >> + } >> + } >> + } >> + } while (in_sg != NULL && i < areq->nbytes); >> + >> + /* ask the device to finish the hashing */ >> + writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL); >> + i = 0; >> + do { >> + v = readl(ss->base + SS_CTL); >> + i++; >> + } while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0); >> + if (i >= SS_TIMEOUT) { >> + dev_err(ss->dev, "ERROR: %s hash end timeout after %d loop, CTL=%x\n", >> + __func__, i, v); >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return -EIO; >> + } >> + >> + /* get the partial hash */ >> + if (op->mode == SS_OP_SHA1) { >> + for (i = 0; i < 5; i++) >> + op->hash[i] = readl(ss->base + SS_MD0 + i * 4); >> + } else { >> + for (i = 0; i < 4; i++) >> + op->hash[i] = readl(ss->base + SS_MD0 + i * 4); >> + } >> + >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return 0; >> +} >> + >> +/* >> + * sunxi_hash_final: finalize hashing operation >> + * >> + * If we have some remaining bytes, we write them. >> + * Then ask the SS for finalizing the hashing operation >> + */ >> +int sunxi_hash_final(struct ahash_request *areq) >> +{ >> + u32 v, ivmode = 0; >> + unsigned int i; >> + int zeros; >> + unsigned int index, padlen; >> + __be64 bits; >> + struct sunxi_req_ctx *op = ahash_request_ctx(areq); >> + >> + dev_dbg(ss->dev, "%s byte=%llu len=%u mode=%x bw=%u %x h=%x ww=%u", >> + __func__, op->byte_count, areq->nbytes, op->mode, >> + op->nbw, op->wb, op->hash[0], op->nwait); >> + >> + mutex_lock(&ss->lock); >> + rx_cnt = 0; >> + >> + /* >> + * if we have already writed something, >> + * restore the partial hash state >> + */ >> + if (op->byte_count > 0) { >> + ivmode = SS_IV_ARBITRARY; >> + for (i = 0; i < 5; i++) >> + writel(op->hash[i], ss->base + SS_IV0 + i * 4); >> + } >> + writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL); >> + >> + /* write the remaining words of the wait buffer */ >> + if (op->nwait > 0) { >> + for (i = 0; i < op->nwait; i++) { >> + v = op->wait[i]; >> + ss_writer(v); >> + op->byte_count += 4; >> + dev_dbg(ss->dev, "%s write %llu i=%u %x\n", >> + __func__, op->byte_count, i, v); >> + } >> + op->nwait = 0; >> + } >> + >> + /* write the remaining bytes of the nbw buffer */ >> + if (op->nbw > 0) { >> + op->wb |= ((1 << 7) << (op->nbw * 8)); >> + ss_writer(op->wb); >> + } else { >> + ss_writer((1 << 7)); >> + } >> + >> + /* >> + * number of space to pad to obtain 64o minus 8(size) minus 4 (final 1) >> + * I take the operations from other md5/sha1 implementations >> + */ >> + >> + /* we have already send 4 more byte of which nbw data */ >> + if (op->mode == SS_OP_MD5) { >> + index = (op->byte_count + 4) & 0x3f; >> + op->byte_count += op->nbw; >> + if (index > 56) >> + zeros = (120 - index) / 4; >> + else >> + zeros = (56 - index) / 4; >> + } else { >> + op->byte_count += op->nbw; >> + index = op->byte_count & 0x3f; >> + padlen = (index < 56) ? (56 - index) : ((64+56) - index); >> + zeros = (padlen - 1) / 4; >> + } >> + for (i = 0; i < zeros; i++) >> + ss_writer(0); >> + >> + /* write the length of data */ >> + if (op->mode == SS_OP_SHA1) { >> + bits = cpu_to_be64(op->byte_count << 3); >> + ss_writer(bits & 0xffffffff); >> + ss_writer((bits >> 32) & 0xffffffff); >> + } else { >> + ss_writer((op->byte_count << 3) & 0xffffffff); >> + ss_writer((op->byte_count >> 29) & 0xffffffff); >> + } >> + >> + /* Tell the SS to stop the hashing */ >> + writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL); >> + >> + /* >> + * Wait for SS to finish the hash. >> + * The timeout could happend only in case of bad overcloking >> + * or driver bug. >> + */ >> + i = 0; >> + do { >> + v = readl(ss->base + SS_CTL); >> + i++; >> + } while (i < SS_TIMEOUT && (v & SS_DATA_END) > 0); >> + if (i >= SS_TIMEOUT) { >> + dev_err(ss->dev, "ERROR: hash end timeout %d>%d ctl=%x len=%u\n", >> + i, SS_TIMEOUT, v, areq->nbytes); >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return -EIO; >> + } >> + >> + /* Get the hash from the device */ >> + if (op->mode == SS_OP_SHA1) { >> + for (i = 0; i < 5; i++) { >> + v = cpu_to_be32(readl(ss->base + SS_MD0 + i * 4)); >> + memcpy(areq->result + i * 4, &v, 4); >> + } >> + } else { >> + for (i = 0; i < 4; i++) { >> + v = readl(ss->base + SS_MD0 + i * 4); >> + memcpy(areq->result + i * 4, &v, 4); >> + } >> + } >> + writel(0, ss->base + SS_CTL); >> + mutex_unlock(&ss->lock); >> + return 0; >> +} >> + >> +/* sunxi_hash_finup: finalize hashing operation after an update */ >> +int sunxi_hash_finup(struct ahash_request *areq) >> +{ >> + int err; >> + >> + err = sunxi_hash_update(areq); >> + if (err != 0) >> + return err; >> + >> + return sunxi_hash_final(areq); >> +} >> + >> +/* combo of init/update/final functions */ >> +int sunxi_hash_digest(struct ahash_request *areq) >> +{ >> + int err; >> + >> + err = sunxi_hash_init(areq); >> + if (err != 0) >> + return err; >> + >> + err = sunxi_hash_update(areq); >> + if (err != 0) >> + return err; >> + >> + return sunxi_hash_final(areq); >> +} >> diff --git a/drivers/crypto/sunxi-ss/sunxi-ss.h b/drivers/crypto/sunxi-ss/sunxi-ss.h >> new file mode 100644 >> index 0000000..331e75b >> --- /dev/null >> +++ b/drivers/crypto/sunxi-ss/sunxi-ss.h >> @@ -0,0 +1,193 @@ >> +/* >> + * sunxi-ss.c - hardware cryptographic accelerator for Allwinner A20 SoC >> + * >> + * Copyright (C) 2013-2014 Corentin LABBE >> + * >> + * Support AES cipher with 128,192,256 bits keysize. >> + * Support MD5 and SHA1 hash algorithms. >> + * Support DES and 3DES >> + * >> + * You could find the datasheet in Documentation/arm/sunxi/README >> + * >> + * Licensed under the GPL-2. >> + */ >> + >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> + >> +#define SS_CTL 0x00 >> +#define SS_KEY0 0x04 >> +#define SS_KEY1 0x08 >> +#define SS_KEY2 0x0C >> +#define SS_KEY3 0x10 >> +#define SS_KEY4 0x14 >> +#define SS_KEY5 0x18 >> +#define SS_KEY6 0x1C >> +#define SS_KEY7 0x20 >> + >> +#define SS_IV0 0x24 >> +#define SS_IV1 0x28 >> +#define SS_IV2 0x2C >> +#define SS_IV3 0x30 >> + >> +#define SS_CNT0 0x34 >> +#define SS_CNT1 0x38 >> +#define SS_CNT2 0x3C >> +#define SS_CNT3 0x40 >> + >> +#define SS_FCSR 0x44 >> +#define SS_ICSR 0x48 >> + >> +#define SS_MD0 0x4C >> +#define SS_MD1 0x50 >> +#define SS_MD2 0x54 >> +#define SS_MD3 0x58 >> +#define SS_MD4 0x5C >> + >> +#define SS_RXFIFO 0x200 >> +#define SS_TXFIFO 0x204 >> + >> +/* SS_CTL configuration values */ >> + >> +/* PRNG generator mode - bit 15 */ >> +#define SS_PRNG_ONESHOT (0 << 15) >> +#define SS_PRNG_CONTINUE (1 << 15) >> + >> +/* IV mode for hash */ >> +#define SS_IV_ARBITRARY (1 << 14) >> + >> +/* SS operation mode - bits 12-13 */ >> +#define SS_ECB (0 << 12) >> +#define SS_CBC (1 << 12) >> +#define SS_CNT (2 << 12) >> + >> +/* Counter width for CNT mode - bits 10-11 */ >> +#define SS_CNT_16BITS (0 << 10) >> +#define SS_CNT_32BITS (1 << 10) >> +#define SS_CNT_64BITS (2 << 10) >> + >> +/* Key size for AES - bits 8-9 */ >> +#define SS_AES_128BITS (0 << 8) >> +#define SS_AES_192BITS (1 << 8) >> +#define SS_AES_256BITS (2 << 8) >> + >> +/* Operation direction - bit 7 */ >> +#define SS_ENCRYPTION (0 << 7) >> +#define SS_DECRYPTION (1 << 7) >> + >> +/* SS Method - bits 4-6 */ >> +#define SS_OP_AES (0 << 4) >> +#define SS_OP_DES (1 << 4) >> +#define SS_OP_3DES (2 << 4) >> +#define SS_OP_SHA1 (3 << 4) >> +#define SS_OP_MD5 (4 << 4) >> +#define SS_OP_PRNG (5 << 4) >> + >> +/* Data end bit - bit 2 */ >> +#define SS_DATA_END (1 << 2) >> + >> +/* PRNG start bit - bit 1 */ >> +#define SS_PRNG_START (1 << 1) >> + >> +/* SS Enable bit - bit 0 */ >> +#define SS_DISABLED (0 << 0) >> +#define SS_ENABLED (1 << 0) >> + >> +/* SS_FCSR configuration values */ >> +/* RX FIFO status - bit 30 */ >> +#define SS_RXFIFO_FREE (1 << 30) >> + >> +/* RX FIFO empty spaces - bits 24-29 */ >> +#define SS_RXFIFO_SPACES(val) (((val) >> 24) & 0x3f) >> + >> +/* TX FIFO status - bit 22 */ >> +#define SS_TXFIFO_AVAILABLE (1 << 22) >> + >> +/* TX FIFO available spaces - bits 16-21 */ >> +#define SS_TXFIFO_SPACES(val) (((val) >> 16) & 0x3f) >> + >> +#define SS_RXFIFO_EMP_INT_PENDING (1 << 10) >> +#define SS_TXFIFO_AVA_INT_PENDING (1 << 8) >> +#define SS_RXFIFO_EMP_INT_ENABLE (1 << 2) >> +#define SS_TXFIFO_AVA_INT_ENABLE (1 << 0) >> + >> +/* SS_ICSR configuration values */ >> +#define SS_ICS_DRQ_ENABLE (1 << 4) >> + >> +struct sunxi_ss_ctx { >> + void __iomem *base; >> + int irq; >> + struct clk *busclk; >> + struct clk *ssclk; >> + struct device *dev; >> + struct resource *res; >> + void *buf_in; /* pointer to data to be uploaded to the device */ >> + size_t buf_in_size; /* size of buf_in */ >> + void *buf_out; >> + size_t buf_out_size; >> + struct mutex lock; /* control the use of the device */ >> + struct mutex bufout_lock; /* control the use of buf_out*/ >> + struct mutex bufin_lock; /* control the sue of buf_in*/ >> +}; >> + >> +struct sunxi_tfm_ctx { >> + u32 key[AES_MAX_KEY_SIZE / 4];/* divided by sizeof(u32) */ >> + u32 keylen; >> + u32 keymode; >> +}; >> + >> +struct sunxi_req_ctx { >> + u32 mode; >> + u64 byte_count; /* number of bytes "uploaded" to the device */ >> + u32 wb; /* a partial word waiting to be completed and >> + uploaded to the device */ >> + /* number of bytes to be uploaded in the wb word */ >> + unsigned int nbw; >> + u32 hash[5]; >> + u32 wait[64]; >> + unsigned int nwait; >> +}; >> + >> +#define SS_SEED_LEN (192/8) >> +#define SS_DATA_LEN (160/8) >> + >> +struct prng_context { >> + u32 seed[SS_SEED_LEN/4]; >> + unsigned int slen; >> +}; >> + >> +int sunxi_hash_crainit(struct crypto_tfm *tfm); >> +int sunxi_hash_init(struct ahash_request *areq); >> +int sunxi_hash_update(struct ahash_request *areq); >> +int sunxi_hash_final(struct ahash_request *areq); >> +int sunxi_hash_finup(struct ahash_request *areq); >> +int sunxi_hash_digest(struct ahash_request *areq); >> +int sunxi_hash_export(struct ahash_request *areq, void *out); >> +int sunxi_hash_import(struct ahash_request *areq, const void *in); >> + >> +int sunxi_ss_aes_poll(struct ablkcipher_request *areq, u32 mode); >> +int sunxi_ss_des_poll(struct ablkcipher_request *areq, u32 mode); >> +int sunxi_ss_cipher_init(struct crypto_tfm *tfm); >> +int sunxi_ss_cipher_encrypt(struct ablkcipher_request *areq); >> +int sunxi_ss_cipher_decrypt(struct ablkcipher_request *areq); >> +int sunxi_ss_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen); >> +int sunxi_ss_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen); >> +int sunxi_ss_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key, >> + unsigned int keylen); >> -- >> 2.0.4 >> > > Thanks, > Maxime > Thanks for your review and time. Corentin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/