![Lee Nipper](/assets/img/avatar_default.png)
This patch adds support for: authenc(hmac(sha256),cbc(aes)), authenc(hmac(sha256),cbc(des3_ede)), authenc(hmac(md5),cbc(aes)), authenc(hmac(md5),cbc(des3_ede)). Some constant usage was changed to use aes, des, and sha include files. Signed-off-by: Lee Nipper <lee.nipper@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
1598 lines
43 KiB
C
1598 lines
43 KiB
C
/*
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* talitos - Freescale Integrated Security Engine (SEC) device driver
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*
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* Copyright (c) 2008 Freescale Semiconductor, Inc.
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*
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* Scatterlist Crypto API glue code copied from files with the following:
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* Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* Crypto algorithm registration code copied from hifn driver:
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* 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/crypto.h>
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#include <linux/hw_random.h>
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#include <linux/of_platform.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <linux/rtnetlink.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/des.h>
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#include <crypto/sha.h>
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#include <crypto/aead.h>
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#include <crypto/authenc.h>
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#include "talitos.h"
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#define TALITOS_TIMEOUT 100000
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#define TALITOS_MAX_DATA_LEN 65535
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#define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f)
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#define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf)
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#define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf)
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/* descriptor pointer entry */
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struct talitos_ptr {
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__be16 len; /* length */
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u8 j_extent; /* jump to sg link table and/or extent */
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u8 eptr; /* extended address */
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__be32 ptr; /* address */
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};
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/* descriptor */
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struct talitos_desc {
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__be32 hdr; /* header high bits */
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__be32 hdr_lo; /* header low bits */
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struct talitos_ptr ptr[7]; /* ptr/len pair array */
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};
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/**
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* talitos_request - descriptor submission request
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* @desc: descriptor pointer (kernel virtual)
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* @dma_desc: descriptor's physical bus address
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* @callback: whom to call when descriptor processing is done
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* @context: caller context (optional)
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*/
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struct talitos_request {
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struct talitos_desc *desc;
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dma_addr_t dma_desc;
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void (*callback) (struct device *dev, struct talitos_desc *desc,
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void *context, int error);
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void *context;
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};
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struct talitos_private {
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struct device *dev;
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struct of_device *ofdev;
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void __iomem *reg;
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int irq;
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/* SEC version geometry (from device tree node) */
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unsigned int num_channels;
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unsigned int chfifo_len;
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unsigned int exec_units;
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unsigned int desc_types;
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/* next channel to be assigned next incoming descriptor */
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atomic_t last_chan;
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/* per-channel request fifo */
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struct talitos_request **fifo;
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/*
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* length of the request fifo
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* fifo_len is chfifo_len rounded up to next power of 2
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* so we can use bitwise ops to wrap
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*/
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unsigned int fifo_len;
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/* per-channel index to next free descriptor request */
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int *head;
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/* per-channel index to next in-progress/done descriptor request */
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int *tail;
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/* per-channel request submission (head) and release (tail) locks */
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spinlock_t *head_lock;
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spinlock_t *tail_lock;
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/* request callback tasklet */
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struct tasklet_struct done_task;
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struct tasklet_struct error_task;
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/* list of registered algorithms */
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struct list_head alg_list;
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/* hwrng device */
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struct hwrng rng;
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};
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/*
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* map virtual single (contiguous) pointer to h/w descriptor pointer
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*/
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static void map_single_talitos_ptr(struct device *dev,
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struct talitos_ptr *talitos_ptr,
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unsigned short len, void *data,
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unsigned char extent,
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enum dma_data_direction dir)
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{
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talitos_ptr->len = cpu_to_be16(len);
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talitos_ptr->ptr = cpu_to_be32(dma_map_single(dev, data, len, dir));
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talitos_ptr->j_extent = extent;
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}
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/*
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* unmap bus single (contiguous) h/w descriptor pointer
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*/
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static void unmap_single_talitos_ptr(struct device *dev,
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struct talitos_ptr *talitos_ptr,
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enum dma_data_direction dir)
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{
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dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
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be16_to_cpu(talitos_ptr->len), dir);
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}
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static int reset_channel(struct device *dev, int ch)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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unsigned int timeout = TALITOS_TIMEOUT;
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setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET);
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while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET)
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&& --timeout)
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cpu_relax();
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if (timeout == 0) {
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dev_err(dev, "failed to reset channel %d\n", ch);
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return -EIO;
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}
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/* set done writeback and IRQ */
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setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE |
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TALITOS_CCCR_LO_CDIE);
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return 0;
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}
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static int reset_device(struct device *dev)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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unsigned int timeout = TALITOS_TIMEOUT;
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setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR);
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while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR)
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&& --timeout)
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cpu_relax();
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if (timeout == 0) {
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dev_err(dev, "failed to reset device\n");
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return -EIO;
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}
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return 0;
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}
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/*
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* Reset and initialize the device
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*/
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static int init_device(struct device *dev)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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int ch, err;
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/*
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* Master reset
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* errata documentation: warning: certain SEC interrupts
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* are not fully cleared by writing the MCR:SWR bit,
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* set bit twice to completely reset
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*/
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err = reset_device(dev);
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if (err)
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return err;
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err = reset_device(dev);
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if (err)
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return err;
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/* reset channels */
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for (ch = 0; ch < priv->num_channels; ch++) {
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err = reset_channel(dev, ch);
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if (err)
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return err;
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}
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/* enable channel done and error interrupts */
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setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
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setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
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return 0;
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}
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/**
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* talitos_submit - submits a descriptor to the device for processing
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* @dev: the SEC device to be used
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* @desc: the descriptor to be processed by the device
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* @callback: whom to call when processing is complete
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* @context: a handle for use by caller (optional)
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*
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* desc must contain valid dma-mapped (bus physical) address pointers.
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* callback must check err and feedback in descriptor header
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* for device processing status.
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*/
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static int talitos_submit(struct device *dev, struct talitos_desc *desc,
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void (*callback)(struct device *dev,
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struct talitos_desc *desc,
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void *context, int error),
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void *context)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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struct talitos_request *request;
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unsigned long flags, ch;
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int head;
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/* select done notification */
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desc->hdr |= DESC_HDR_DONE_NOTIFY;
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/* emulate SEC's round-robin channel fifo polling scheme */
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ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1);
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spin_lock_irqsave(&priv->head_lock[ch], flags);
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head = priv->head[ch];
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request = &priv->fifo[ch][head];
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if (request->desc) {
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/* request queue is full */
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spin_unlock_irqrestore(&priv->head_lock[ch], flags);
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return -EAGAIN;
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}
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/* map descriptor and save caller data */
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request->dma_desc = dma_map_single(dev, desc, sizeof(*desc),
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DMA_BIDIRECTIONAL);
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request->callback = callback;
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request->context = context;
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/* increment fifo head */
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priv->head[ch] = (priv->head[ch] + 1) & (priv->fifo_len - 1);
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smp_wmb();
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request->desc = desc;
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/* GO! */
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wmb();
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out_be32(priv->reg + TALITOS_FF_LO(ch), request->dma_desc);
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spin_unlock_irqrestore(&priv->head_lock[ch], flags);
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return -EINPROGRESS;
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}
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/*
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* process what was done, notify callback of error if not
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*/
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static void flush_channel(struct device *dev, int ch, int error, int reset_ch)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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struct talitos_request *request, saved_req;
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unsigned long flags;
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int tail, status;
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spin_lock_irqsave(&priv->tail_lock[ch], flags);
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tail = priv->tail[ch];
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while (priv->fifo[ch][tail].desc) {
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request = &priv->fifo[ch][tail];
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/* descriptors with their done bits set don't get the error */
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rmb();
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if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE)
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status = 0;
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else
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if (!error)
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break;
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else
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status = error;
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dma_unmap_single(dev, request->dma_desc,
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sizeof(struct talitos_desc), DMA_BIDIRECTIONAL);
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/* copy entries so we can call callback outside lock */
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saved_req.desc = request->desc;
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saved_req.callback = request->callback;
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saved_req.context = request->context;
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/* release request entry in fifo */
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smp_wmb();
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request->desc = NULL;
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/* increment fifo tail */
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priv->tail[ch] = (tail + 1) & (priv->fifo_len - 1);
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spin_unlock_irqrestore(&priv->tail_lock[ch], flags);
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saved_req.callback(dev, saved_req.desc, saved_req.context,
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status);
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/* channel may resume processing in single desc error case */
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if (error && !reset_ch && status == error)
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return;
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spin_lock_irqsave(&priv->tail_lock[ch], flags);
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tail = priv->tail[ch];
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}
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spin_unlock_irqrestore(&priv->tail_lock[ch], flags);
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}
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/*
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* process completed requests for channels that have done status
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*/
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static void talitos_done(unsigned long data)
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{
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struct device *dev = (struct device *)data;
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struct talitos_private *priv = dev_get_drvdata(dev);
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int ch;
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for (ch = 0; ch < priv->num_channels; ch++)
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flush_channel(dev, ch, 0, 0);
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}
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/*
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* locate current (offending) descriptor
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*/
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static struct talitos_desc *current_desc(struct device *dev, int ch)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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int tail = priv->tail[ch];
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dma_addr_t cur_desc;
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cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch));
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while (priv->fifo[ch][tail].dma_desc != cur_desc) {
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tail = (tail + 1) & (priv->fifo_len - 1);
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if (tail == priv->tail[ch]) {
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dev_err(dev, "couldn't locate current descriptor\n");
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return NULL;
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}
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}
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return priv->fifo[ch][tail].desc;
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}
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/*
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* user diagnostics; report root cause of error based on execution unit status
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*/
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static void report_eu_error(struct device *dev, int ch, struct talitos_desc *desc)
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{
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struct talitos_private *priv = dev_get_drvdata(dev);
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int i;
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switch (desc->hdr & DESC_HDR_SEL0_MASK) {
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case DESC_HDR_SEL0_AFEU:
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dev_err(dev, "AFEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_AFEUISR),
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in_be32(priv->reg + TALITOS_AFEUISR_LO));
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break;
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case DESC_HDR_SEL0_DEU:
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dev_err(dev, "DEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_DEUISR),
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in_be32(priv->reg + TALITOS_DEUISR_LO));
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break;
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case DESC_HDR_SEL0_MDEUA:
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case DESC_HDR_SEL0_MDEUB:
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dev_err(dev, "MDEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_MDEUISR),
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in_be32(priv->reg + TALITOS_MDEUISR_LO));
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break;
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case DESC_HDR_SEL0_RNG:
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dev_err(dev, "RNGUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_RNGUISR),
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in_be32(priv->reg + TALITOS_RNGUISR_LO));
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break;
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case DESC_HDR_SEL0_PKEU:
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dev_err(dev, "PKEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_PKEUISR),
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in_be32(priv->reg + TALITOS_PKEUISR_LO));
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break;
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case DESC_HDR_SEL0_AESU:
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dev_err(dev, "AESUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_AESUISR),
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in_be32(priv->reg + TALITOS_AESUISR_LO));
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break;
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case DESC_HDR_SEL0_CRCU:
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dev_err(dev, "CRCUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_CRCUISR),
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in_be32(priv->reg + TALITOS_CRCUISR_LO));
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break;
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case DESC_HDR_SEL0_KEU:
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dev_err(dev, "KEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_KEUISR),
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in_be32(priv->reg + TALITOS_KEUISR_LO));
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break;
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}
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switch (desc->hdr & DESC_HDR_SEL1_MASK) {
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case DESC_HDR_SEL1_MDEUA:
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case DESC_HDR_SEL1_MDEUB:
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dev_err(dev, "MDEUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_MDEUISR),
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in_be32(priv->reg + TALITOS_MDEUISR_LO));
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break;
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case DESC_HDR_SEL1_CRCU:
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dev_err(dev, "CRCUISR 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_CRCUISR),
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in_be32(priv->reg + TALITOS_CRCUISR_LO));
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break;
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}
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for (i = 0; i < 8; i++)
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dev_err(dev, "DESCBUF 0x%08x_%08x\n",
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in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i),
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in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i));
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}
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/*
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* recover from error interrupts
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*/
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static void talitos_error(unsigned long data)
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{
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struct device *dev = (struct device *)data;
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struct talitos_private *priv = dev_get_drvdata(dev);
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unsigned int timeout = TALITOS_TIMEOUT;
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int ch, error, reset_dev = 0, reset_ch = 0;
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u32 isr, isr_lo, v, v_lo;
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isr = in_be32(priv->reg + TALITOS_ISR);
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isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
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for (ch = 0; ch < priv->num_channels; ch++) {
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/* skip channels without errors */
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if (!(isr & (1 << (ch * 2 + 1))))
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continue;
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error = -EINVAL;
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v = in_be32(priv->reg + TALITOS_CCPSR(ch));
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v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch));
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if (v_lo & TALITOS_CCPSR_LO_DOF) {
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dev_err(dev, "double fetch fifo overflow error\n");
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error = -EAGAIN;
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reset_ch = 1;
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}
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if (v_lo & TALITOS_CCPSR_LO_SOF) {
|
|
/* h/w dropped descriptor */
|
|
dev_err(dev, "single fetch fifo overflow error\n");
|
|
error = -EAGAIN;
|
|
}
|
|
if (v_lo & TALITOS_CCPSR_LO_MDTE)
|
|
dev_err(dev, "master data transfer error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_SGDLZ)
|
|
dev_err(dev, "s/g data length zero error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_FPZ)
|
|
dev_err(dev, "fetch pointer zero error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_IDH)
|
|
dev_err(dev, "illegal descriptor header error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_IEU)
|
|
dev_err(dev, "invalid execution unit error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_EU)
|
|
report_eu_error(dev, ch, current_desc(dev, ch));
|
|
if (v_lo & TALITOS_CCPSR_LO_GB)
|
|
dev_err(dev, "gather boundary error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_GRL)
|
|
dev_err(dev, "gather return/length error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_SB)
|
|
dev_err(dev, "scatter boundary error\n");
|
|
if (v_lo & TALITOS_CCPSR_LO_SRL)
|
|
dev_err(dev, "scatter return/length error\n");
|
|
|
|
flush_channel(dev, ch, error, reset_ch);
|
|
|
|
if (reset_ch) {
|
|
reset_channel(dev, ch);
|
|
} else {
|
|
setbits32(priv->reg + TALITOS_CCCR(ch),
|
|
TALITOS_CCCR_CONT);
|
|
setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0);
|
|
while ((in_be32(priv->reg + TALITOS_CCCR(ch)) &
|
|
TALITOS_CCCR_CONT) && --timeout)
|
|
cpu_relax();
|
|
if (timeout == 0) {
|
|
dev_err(dev, "failed to restart channel %d\n",
|
|
ch);
|
|
reset_dev = 1;
|
|
}
|
|
}
|
|
}
|
|
if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) {
|
|
dev_err(dev, "done overflow, internal time out, or rngu error: "
|
|
"ISR 0x%08x_%08x\n", isr, isr_lo);
|
|
|
|
/* purge request queues */
|
|
for (ch = 0; ch < priv->num_channels; ch++)
|
|
flush_channel(dev, ch, -EIO, 1);
|
|
|
|
/* reset and reinitialize the device */
|
|
init_device(dev);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t talitos_interrupt(int irq, void *data)
|
|
{
|
|
struct device *dev = data;
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
u32 isr, isr_lo;
|
|
|
|
isr = in_be32(priv->reg + TALITOS_ISR);
|
|
isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
|
|
|
|
/* ack */
|
|
out_be32(priv->reg + TALITOS_ICR, isr);
|
|
out_be32(priv->reg + TALITOS_ICR_LO, isr_lo);
|
|
|
|
if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo))
|
|
talitos_error((unsigned long)data);
|
|
else
|
|
if (likely(isr & TALITOS_ISR_CHDONE))
|
|
tasklet_schedule(&priv->done_task);
|
|
|
|
return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE;
|
|
}
|
|
|
|
/*
|
|
* hwrng
|
|
*/
|
|
static int talitos_rng_data_present(struct hwrng *rng, int wait)
|
|
{
|
|
struct device *dev = (struct device *)rng->priv;
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
u32 ofl;
|
|
int i;
|
|
|
|
for (i = 0; i < 20; i++) {
|
|
ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) &
|
|
TALITOS_RNGUSR_LO_OFL;
|
|
if (ofl || !wait)
|
|
break;
|
|
udelay(10);
|
|
}
|
|
|
|
return !!ofl;
|
|
}
|
|
|
|
static int talitos_rng_data_read(struct hwrng *rng, u32 *data)
|
|
{
|
|
struct device *dev = (struct device *)rng->priv;
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
|
|
/* rng fifo requires 64-bit accesses */
|
|
*data = in_be32(priv->reg + TALITOS_RNGU_FIFO);
|
|
*data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO);
|
|
|
|
return sizeof(u32);
|
|
}
|
|
|
|
static int talitos_rng_init(struct hwrng *rng)
|
|
{
|
|
struct device *dev = (struct device *)rng->priv;
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
unsigned int timeout = TALITOS_TIMEOUT;
|
|
|
|
setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR);
|
|
while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD)
|
|
&& --timeout)
|
|
cpu_relax();
|
|
if (timeout == 0) {
|
|
dev_err(dev, "failed to reset rng hw\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* start generating */
|
|
setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int talitos_register_rng(struct device *dev)
|
|
{
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
|
|
priv->rng.name = dev_driver_string(dev),
|
|
priv->rng.init = talitos_rng_init,
|
|
priv->rng.data_present = talitos_rng_data_present,
|
|
priv->rng.data_read = talitos_rng_data_read,
|
|
priv->rng.priv = (unsigned long)dev;
|
|
|
|
return hwrng_register(&priv->rng);
|
|
}
|
|
|
|
static void talitos_unregister_rng(struct device *dev)
|
|
{
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
|
|
hwrng_unregister(&priv->rng);
|
|
}
|
|
|
|
/*
|
|
* crypto alg
|
|
*/
|
|
#define TALITOS_CRA_PRIORITY 3000
|
|
#define TALITOS_MAX_KEY_SIZE 64
|
|
#define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
|
|
|
|
#define MD5_DIGEST_SIZE 16
|
|
|
|
struct talitos_ctx {
|
|
struct device *dev;
|
|
__be32 desc_hdr_template;
|
|
u8 key[TALITOS_MAX_KEY_SIZE];
|
|
u8 iv[TALITOS_MAX_IV_LENGTH];
|
|
unsigned int keylen;
|
|
unsigned int enckeylen;
|
|
unsigned int authkeylen;
|
|
unsigned int authsize;
|
|
};
|
|
|
|
static int aead_authenc_setauthsize(struct crypto_aead *authenc,
|
|
unsigned int authsize)
|
|
{
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
|
|
ctx->authsize = authsize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int aead_authenc_setkey(struct crypto_aead *authenc,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct rtattr *rta = (void *)key;
|
|
struct crypto_authenc_key_param *param;
|
|
unsigned int authkeylen;
|
|
unsigned int enckeylen;
|
|
|
|
if (!RTA_OK(rta, keylen))
|
|
goto badkey;
|
|
|
|
if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
|
|
goto badkey;
|
|
|
|
if (RTA_PAYLOAD(rta) < sizeof(*param))
|
|
goto badkey;
|
|
|
|
param = RTA_DATA(rta);
|
|
enckeylen = be32_to_cpu(param->enckeylen);
|
|
|
|
key += RTA_ALIGN(rta->rta_len);
|
|
keylen -= RTA_ALIGN(rta->rta_len);
|
|
|
|
if (keylen < enckeylen)
|
|
goto badkey;
|
|
|
|
authkeylen = keylen - enckeylen;
|
|
|
|
if (keylen > TALITOS_MAX_KEY_SIZE)
|
|
goto badkey;
|
|
|
|
memcpy(&ctx->key, key, keylen);
|
|
|
|
ctx->keylen = keylen;
|
|
ctx->enckeylen = enckeylen;
|
|
ctx->authkeylen = authkeylen;
|
|
|
|
return 0;
|
|
|
|
badkey:
|
|
crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* ipsec_esp_edesc - s/w-extended ipsec_esp descriptor
|
|
* @src_nents: number of segments in input scatterlist
|
|
* @dst_nents: number of segments in output scatterlist
|
|
* @dma_len: length of dma mapped link_tbl space
|
|
* @dma_link_tbl: bus physical address of link_tbl
|
|
* @desc: h/w descriptor
|
|
* @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
|
|
*
|
|
* if decrypting (with authcheck), or either one of src_nents or dst_nents
|
|
* is greater than 1, an integrity check value is concatenated to the end
|
|
* of link_tbl data
|
|
*/
|
|
struct ipsec_esp_edesc {
|
|
int src_nents;
|
|
int dst_nents;
|
|
int dma_len;
|
|
dma_addr_t dma_link_tbl;
|
|
struct talitos_desc desc;
|
|
struct talitos_ptr link_tbl[0];
|
|
};
|
|
|
|
static void ipsec_esp_unmap(struct device *dev,
|
|
struct ipsec_esp_edesc *edesc,
|
|
struct aead_request *areq)
|
|
{
|
|
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
|
|
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
|
|
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
|
|
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
|
|
|
|
dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE);
|
|
|
|
if (areq->src != areq->dst) {
|
|
dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1,
|
|
DMA_TO_DEVICE);
|
|
dma_unmap_sg(dev, areq->dst, edesc->dst_nents ? : 1,
|
|
DMA_FROM_DEVICE);
|
|
} else {
|
|
dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1,
|
|
DMA_BIDIRECTIONAL);
|
|
}
|
|
|
|
if (edesc->dma_len)
|
|
dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
|
|
DMA_BIDIRECTIONAL);
|
|
}
|
|
|
|
/*
|
|
* ipsec_esp descriptor callbacks
|
|
*/
|
|
static void ipsec_esp_encrypt_done(struct device *dev,
|
|
struct talitos_desc *desc, void *context,
|
|
int err)
|
|
{
|
|
struct aead_request *areq = context;
|
|
struct ipsec_esp_edesc *edesc =
|
|
container_of(desc, struct ipsec_esp_edesc, desc);
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct scatterlist *sg;
|
|
void *icvdata;
|
|
|
|
ipsec_esp_unmap(dev, edesc, areq);
|
|
|
|
/* copy the generated ICV to dst */
|
|
if (edesc->dma_len) {
|
|
icvdata = &edesc->link_tbl[edesc->src_nents +
|
|
edesc->dst_nents + 1];
|
|
sg = sg_last(areq->dst, edesc->dst_nents);
|
|
memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
|
|
icvdata, ctx->authsize);
|
|
}
|
|
|
|
kfree(edesc);
|
|
|
|
aead_request_complete(areq, err);
|
|
}
|
|
|
|
static void ipsec_esp_decrypt_done(struct device *dev,
|
|
struct talitos_desc *desc, void *context,
|
|
int err)
|
|
{
|
|
struct aead_request *req = context;
|
|
struct ipsec_esp_edesc *edesc =
|
|
container_of(desc, struct ipsec_esp_edesc, desc);
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct scatterlist *sg;
|
|
void *icvdata;
|
|
|
|
ipsec_esp_unmap(dev, edesc, req);
|
|
|
|
if (!err) {
|
|
/* auth check */
|
|
if (edesc->dma_len)
|
|
icvdata = &edesc->link_tbl[edesc->src_nents +
|
|
edesc->dst_nents + 1];
|
|
else
|
|
icvdata = &edesc->link_tbl[0];
|
|
|
|
sg = sg_last(req->dst, edesc->dst_nents ? : 1);
|
|
err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
|
|
ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
|
|
}
|
|
|
|
kfree(edesc);
|
|
|
|
aead_request_complete(req, err);
|
|
}
|
|
|
|
/*
|
|
* convert scatterlist to SEC h/w link table format
|
|
* stop at cryptlen bytes
|
|
*/
|
|
static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
|
|
int cryptlen, struct talitos_ptr *link_tbl_ptr)
|
|
{
|
|
int n_sg = sg_count;
|
|
|
|
while (n_sg--) {
|
|
link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg));
|
|
link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
|
|
link_tbl_ptr->j_extent = 0;
|
|
link_tbl_ptr++;
|
|
cryptlen -= sg_dma_len(sg);
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
/* adjust (decrease) last one (or two) entry's len to cryptlen */
|
|
link_tbl_ptr--;
|
|
while (link_tbl_ptr->len <= (-cryptlen)) {
|
|
/* Empty this entry, and move to previous one */
|
|
cryptlen += be16_to_cpu(link_tbl_ptr->len);
|
|
link_tbl_ptr->len = 0;
|
|
sg_count--;
|
|
link_tbl_ptr--;
|
|
}
|
|
link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
|
|
+ cryptlen);
|
|
|
|
/* tag end of link table */
|
|
link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
|
|
|
|
return sg_count;
|
|
}
|
|
|
|
/*
|
|
* fill in and submit ipsec_esp descriptor
|
|
*/
|
|
static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
|
|
u8 *giv, u64 seq,
|
|
void (*callback) (struct device *dev,
|
|
struct talitos_desc *desc,
|
|
void *context, int error))
|
|
{
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(areq);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(aead);
|
|
struct device *dev = ctx->dev;
|
|
struct talitos_desc *desc = &edesc->desc;
|
|
unsigned int cryptlen = areq->cryptlen;
|
|
unsigned int authsize = ctx->authsize;
|
|
unsigned int ivsize;
|
|
int sg_count;
|
|
|
|
/* hmac key */
|
|
map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
|
|
0, DMA_TO_DEVICE);
|
|
/* hmac data */
|
|
map_single_talitos_ptr(dev, &desc->ptr[1], sg_virt(areq->src) -
|
|
sg_virt(areq->assoc), sg_virt(areq->assoc), 0,
|
|
DMA_TO_DEVICE);
|
|
/* cipher iv */
|
|
ivsize = crypto_aead_ivsize(aead);
|
|
map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0,
|
|
DMA_TO_DEVICE);
|
|
|
|
/* cipher key */
|
|
map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
|
|
(char *)&ctx->key + ctx->authkeylen, 0,
|
|
DMA_TO_DEVICE);
|
|
|
|
/*
|
|
* cipher in
|
|
* map and adjust cipher len to aead request cryptlen.
|
|
* extent is bytes of HMAC postpended to ciphertext,
|
|
* typically 12 for ipsec
|
|
*/
|
|
desc->ptr[4].len = cpu_to_be16(cryptlen);
|
|
desc->ptr[4].j_extent = authsize;
|
|
|
|
if (areq->src == areq->dst)
|
|
sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1,
|
|
DMA_BIDIRECTIONAL);
|
|
else
|
|
sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1,
|
|
DMA_TO_DEVICE);
|
|
|
|
if (sg_count == 1) {
|
|
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
|
|
} else {
|
|
sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
|
|
&edesc->link_tbl[0]);
|
|
if (sg_count > 1) {
|
|
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
|
|
desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl);
|
|
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
|
|
edesc->dma_len, DMA_BIDIRECTIONAL);
|
|
} else {
|
|
/* Only one segment now, so no link tbl needed */
|
|
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
|
|
}
|
|
}
|
|
|
|
/* cipher out */
|
|
desc->ptr[5].len = cpu_to_be16(cryptlen);
|
|
desc->ptr[5].j_extent = authsize;
|
|
|
|
if (areq->src != areq->dst) {
|
|
sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1,
|
|
DMA_FROM_DEVICE);
|
|
}
|
|
|
|
if (sg_count == 1) {
|
|
desc->ptr[5].ptr = cpu_to_be32(sg_dma_address(areq->dst));
|
|
} else {
|
|
struct talitos_ptr *link_tbl_ptr =
|
|
&edesc->link_tbl[edesc->src_nents];
|
|
struct scatterlist *sg;
|
|
|
|
desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *)
|
|
edesc->dma_link_tbl +
|
|
edesc->src_nents);
|
|
if (areq->src == areq->dst) {
|
|
memcpy(link_tbl_ptr, &edesc->link_tbl[0],
|
|
edesc->src_nents * sizeof(struct talitos_ptr));
|
|
} else {
|
|
sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
|
|
link_tbl_ptr);
|
|
}
|
|
link_tbl_ptr += sg_count - 1;
|
|
|
|
/* handle case where sg_last contains the ICV exclusively */
|
|
sg = sg_last(areq->dst, edesc->dst_nents);
|
|
if (sg->length == ctx->authsize)
|
|
link_tbl_ptr--;
|
|
|
|
link_tbl_ptr->j_extent = 0;
|
|
link_tbl_ptr++;
|
|
link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
|
|
link_tbl_ptr->len = cpu_to_be16(authsize);
|
|
|
|
/* icv data follows link tables */
|
|
link_tbl_ptr->ptr = cpu_to_be32((struct talitos_ptr *)
|
|
edesc->dma_link_tbl +
|
|
edesc->src_nents +
|
|
edesc->dst_nents + 1);
|
|
|
|
desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
|
|
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
|
|
edesc->dma_len, DMA_BIDIRECTIONAL);
|
|
}
|
|
|
|
/* iv out */
|
|
map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
|
|
DMA_FROM_DEVICE);
|
|
|
|
return talitos_submit(dev, desc, callback, areq);
|
|
}
|
|
|
|
|
|
/*
|
|
* derive number of elements in scatterlist
|
|
*/
|
|
static int sg_count(struct scatterlist *sg_list, int nbytes)
|
|
{
|
|
struct scatterlist *sg = sg_list;
|
|
int sg_nents = 0;
|
|
|
|
while (nbytes) {
|
|
sg_nents++;
|
|
nbytes -= sg->length;
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
return sg_nents;
|
|
}
|
|
|
|
/*
|
|
* allocate and map the ipsec_esp extended descriptor
|
|
*/
|
|
static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
|
|
int icv_stashing)
|
|
{
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct ipsec_esp_edesc *edesc;
|
|
int src_nents, dst_nents, alloc_len, dma_len;
|
|
|
|
if (areq->cryptlen + ctx->authsize > TALITOS_MAX_DATA_LEN) {
|
|
dev_err(ctx->dev, "cryptlen exceeds h/w max limit\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize);
|
|
src_nents = (src_nents == 1) ? 0 : src_nents;
|
|
|
|
if (areq->dst == areq->src) {
|
|
dst_nents = src_nents;
|
|
} else {
|
|
dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize);
|
|
dst_nents = (dst_nents == 1) ? 0 : src_nents;
|
|
}
|
|
|
|
/*
|
|
* allocate space for base edesc plus the link tables,
|
|
* allowing for a separate entry for the generated ICV (+ 1),
|
|
* and the ICV data itself
|
|
*/
|
|
alloc_len = sizeof(struct ipsec_esp_edesc);
|
|
if (src_nents || dst_nents) {
|
|
dma_len = (src_nents + dst_nents + 1) *
|
|
sizeof(struct talitos_ptr) + ctx->authsize;
|
|
alloc_len += dma_len;
|
|
} else {
|
|
dma_len = 0;
|
|
alloc_len += icv_stashing ? ctx->authsize : 0;
|
|
}
|
|
|
|
edesc = kmalloc(alloc_len, GFP_DMA);
|
|
if (!edesc) {
|
|
dev_err(ctx->dev, "could not allocate edescriptor\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
edesc->src_nents = src_nents;
|
|
edesc->dst_nents = dst_nents;
|
|
edesc->dma_len = dma_len;
|
|
edesc->dma_link_tbl = dma_map_single(ctx->dev, &edesc->link_tbl[0],
|
|
edesc->dma_len, DMA_BIDIRECTIONAL);
|
|
|
|
return edesc;
|
|
}
|
|
|
|
static int aead_authenc_encrypt(struct aead_request *req)
|
|
{
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct ipsec_esp_edesc *edesc;
|
|
|
|
/* allocate extended descriptor */
|
|
edesc = ipsec_esp_edesc_alloc(req, 0);
|
|
if (IS_ERR(edesc))
|
|
return PTR_ERR(edesc);
|
|
|
|
/* set encrypt */
|
|
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
|
|
|
|
return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done);
|
|
}
|
|
|
|
static int aead_authenc_decrypt(struct aead_request *req)
|
|
{
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
unsigned int authsize = ctx->authsize;
|
|
struct ipsec_esp_edesc *edesc;
|
|
struct scatterlist *sg;
|
|
void *icvdata;
|
|
|
|
req->cryptlen -= authsize;
|
|
|
|
/* allocate extended descriptor */
|
|
edesc = ipsec_esp_edesc_alloc(req, 1);
|
|
if (IS_ERR(edesc))
|
|
return PTR_ERR(edesc);
|
|
|
|
/* stash incoming ICV for later cmp with ICV generated by the h/w */
|
|
if (edesc->dma_len)
|
|
icvdata = &edesc->link_tbl[edesc->src_nents +
|
|
edesc->dst_nents + 1];
|
|
else
|
|
icvdata = &edesc->link_tbl[0];
|
|
|
|
sg = sg_last(req->src, edesc->src_nents ? : 1);
|
|
|
|
memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
|
|
ctx->authsize);
|
|
|
|
/* decrypt */
|
|
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
|
|
|
|
return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_done);
|
|
}
|
|
|
|
static int aead_authenc_givencrypt(
|
|
struct aead_givcrypt_request *req)
|
|
{
|
|
struct aead_request *areq = &req->areq;
|
|
struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
|
|
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
|
|
struct ipsec_esp_edesc *edesc;
|
|
|
|
/* allocate extended descriptor */
|
|
edesc = ipsec_esp_edesc_alloc(areq, 0);
|
|
if (IS_ERR(edesc))
|
|
return PTR_ERR(edesc);
|
|
|
|
/* set encrypt */
|
|
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
|
|
|
|
memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
|
|
|
|
return ipsec_esp(edesc, areq, req->giv, req->seq,
|
|
ipsec_esp_encrypt_done);
|
|
}
|
|
|
|
struct talitos_alg_template {
|
|
char name[CRYPTO_MAX_ALG_NAME];
|
|
char driver_name[CRYPTO_MAX_ALG_NAME];
|
|
unsigned int blocksize;
|
|
struct aead_alg aead;
|
|
struct device *dev;
|
|
__be32 desc_hdr_template;
|
|
};
|
|
|
|
static struct talitos_alg_template driver_algs[] = {
|
|
/* single-pass ipsec_esp descriptor */
|
|
{
|
|
.name = "authenc(hmac(sha1),cbc(aes))",
|
|
.driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
|
|
.blocksize = AES_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.maxauthsize = SHA1_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_AESU |
|
|
DESC_HDR_MODE0_AESU_CBC |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_SHA1_HMAC,
|
|
},
|
|
{
|
|
.name = "authenc(hmac(sha1),cbc(des3_ede))",
|
|
.driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
|
|
.blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.maxauthsize = SHA1_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_DEU |
|
|
DESC_HDR_MODE0_DEU_CBC |
|
|
DESC_HDR_MODE0_DEU_3DES |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_SHA1_HMAC,
|
|
},
|
|
{
|
|
.name = "authenc(hmac(sha256),cbc(aes))",
|
|
.driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
|
|
.blocksize = AES_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.maxauthsize = SHA256_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_AESU |
|
|
DESC_HDR_MODE0_AESU_CBC |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_SHA256_HMAC,
|
|
},
|
|
{
|
|
.name = "authenc(hmac(sha256),cbc(des3_ede))",
|
|
.driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
|
|
.blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.maxauthsize = SHA256_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_DEU |
|
|
DESC_HDR_MODE0_DEU_CBC |
|
|
DESC_HDR_MODE0_DEU_3DES |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_SHA256_HMAC,
|
|
},
|
|
{
|
|
.name = "authenc(hmac(md5),cbc(aes))",
|
|
.driver_name = "authenc-hmac-md5-cbc-aes-talitos",
|
|
.blocksize = AES_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.maxauthsize = MD5_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_AESU |
|
|
DESC_HDR_MODE0_AESU_CBC |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_MD5_HMAC,
|
|
},
|
|
{
|
|
.name = "authenc(hmac(md5),cbc(des3_ede))",
|
|
.driver_name = "authenc-hmac-md5-cbc-3des-talitos",
|
|
.blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.aead = {
|
|
.setkey = aead_authenc_setkey,
|
|
.setauthsize = aead_authenc_setauthsize,
|
|
.encrypt = aead_authenc_encrypt,
|
|
.decrypt = aead_authenc_decrypt,
|
|
.givencrypt = aead_authenc_givencrypt,
|
|
.geniv = "<built-in>",
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.maxauthsize = MD5_DIGEST_SIZE,
|
|
},
|
|
.desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
|
|
DESC_HDR_SEL0_DEU |
|
|
DESC_HDR_MODE0_DEU_CBC |
|
|
DESC_HDR_MODE0_DEU_3DES |
|
|
DESC_HDR_SEL1_MDEUA |
|
|
DESC_HDR_MODE1_MDEU_INIT |
|
|
DESC_HDR_MODE1_MDEU_PAD |
|
|
DESC_HDR_MODE1_MDEU_MD5_HMAC,
|
|
}
|
|
};
|
|
|
|
struct talitos_crypto_alg {
|
|
struct list_head entry;
|
|
struct device *dev;
|
|
__be32 desc_hdr_template;
|
|
struct crypto_alg crypto_alg;
|
|
};
|
|
|
|
static int talitos_cra_init(struct crypto_tfm *tfm)
|
|
{
|
|
struct crypto_alg *alg = tfm->__crt_alg;
|
|
struct talitos_crypto_alg *talitos_alg =
|
|
container_of(alg, struct talitos_crypto_alg, crypto_alg);
|
|
struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
/* update context with ptr to dev */
|
|
ctx->dev = talitos_alg->dev;
|
|
/* copy descriptor header template value */
|
|
ctx->desc_hdr_template = talitos_alg->desc_hdr_template;
|
|
|
|
/* random first IV */
|
|
get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* given the alg's descriptor header template, determine whether descriptor
|
|
* type and primary/secondary execution units required match the hw
|
|
* capabilities description provided in the device tree node.
|
|
*/
|
|
static int hw_supports(struct device *dev, __be32 desc_hdr_template)
|
|
{
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
|
|
(1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
|
|
|
|
if (SECONDARY_EU(desc_hdr_template))
|
|
ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
|
|
& priv->exec_units);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit talitos_remove(struct of_device *ofdev)
|
|
{
|
|
struct device *dev = &ofdev->dev;
|
|
struct talitos_private *priv = dev_get_drvdata(dev);
|
|
struct talitos_crypto_alg *t_alg, *n;
|
|
int i;
|
|
|
|
list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
|
|
crypto_unregister_alg(&t_alg->crypto_alg);
|
|
list_del(&t_alg->entry);
|
|
kfree(t_alg);
|
|
}
|
|
|
|
if (hw_supports(dev, DESC_HDR_SEL0_RNG))
|
|
talitos_unregister_rng(dev);
|
|
|
|
kfree(priv->tail);
|
|
kfree(priv->head);
|
|
|
|
if (priv->fifo)
|
|
for (i = 0; i < priv->num_channels; i++)
|
|
kfree(priv->fifo[i]);
|
|
|
|
kfree(priv->fifo);
|
|
kfree(priv->head_lock);
|
|
kfree(priv->tail_lock);
|
|
|
|
if (priv->irq != NO_IRQ) {
|
|
free_irq(priv->irq, dev);
|
|
irq_dispose_mapping(priv->irq);
|
|
}
|
|
|
|
tasklet_kill(&priv->done_task);
|
|
tasklet_kill(&priv->error_task);
|
|
|
|
iounmap(priv->reg);
|
|
|
|
dev_set_drvdata(dev, NULL);
|
|
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
|
|
struct talitos_alg_template
|
|
*template)
|
|
{
|
|
struct talitos_crypto_alg *t_alg;
|
|
struct crypto_alg *alg;
|
|
|
|
t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
|
|
if (!t_alg)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
alg = &t_alg->crypto_alg;
|
|
|
|
snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name);
|
|
snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
|
|
template->driver_name);
|
|
alg->cra_module = THIS_MODULE;
|
|
alg->cra_init = talitos_cra_init;
|
|
alg->cra_priority = TALITOS_CRA_PRIORITY;
|
|
alg->cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
|
|
alg->cra_blocksize = template->blocksize;
|
|
alg->cra_alignmask = 0;
|
|
alg->cra_type = &crypto_aead_type;
|
|
alg->cra_ctxsize = sizeof(struct talitos_ctx);
|
|
alg->cra_u.aead = template->aead;
|
|
|
|
t_alg->desc_hdr_template = template->desc_hdr_template;
|
|
t_alg->dev = dev;
|
|
|
|
return t_alg;
|
|
}
|
|
|
|
static int talitos_probe(struct of_device *ofdev,
|
|
const struct of_device_id *match)
|
|
{
|
|
struct device *dev = &ofdev->dev;
|
|
struct device_node *np = ofdev->node;
|
|
struct talitos_private *priv;
|
|
const unsigned int *prop;
|
|
int i, err;
|
|
|
|
priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(dev, priv);
|
|
|
|
priv->ofdev = ofdev;
|
|
|
|
tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
|
|
tasklet_init(&priv->error_task, talitos_error, (unsigned long)dev);
|
|
|
|
priv->irq = irq_of_parse_and_map(np, 0);
|
|
|
|
if (priv->irq == NO_IRQ) {
|
|
dev_err(dev, "failed to map irq\n");
|
|
err = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
/* get the irq line */
|
|
err = request_irq(priv->irq, talitos_interrupt, 0,
|
|
dev_driver_string(dev), dev);
|
|
if (err) {
|
|
dev_err(dev, "failed to request irq %d\n", priv->irq);
|
|
irq_dispose_mapping(priv->irq);
|
|
priv->irq = NO_IRQ;
|
|
goto err_out;
|
|
}
|
|
|
|
priv->reg = of_iomap(np, 0);
|
|
if (!priv->reg) {
|
|
dev_err(dev, "failed to of_iomap\n");
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
/* get SEC version capabilities from device tree */
|
|
prop = of_get_property(np, "fsl,num-channels", NULL);
|
|
if (prop)
|
|
priv->num_channels = *prop;
|
|
|
|
prop = of_get_property(np, "fsl,channel-fifo-len", NULL);
|
|
if (prop)
|
|
priv->chfifo_len = *prop;
|
|
|
|
prop = of_get_property(np, "fsl,exec-units-mask", NULL);
|
|
if (prop)
|
|
priv->exec_units = *prop;
|
|
|
|
prop = of_get_property(np, "fsl,descriptor-types-mask", NULL);
|
|
if (prop)
|
|
priv->desc_types = *prop;
|
|
|
|
if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len ||
|
|
!priv->exec_units || !priv->desc_types) {
|
|
dev_err(dev, "invalid property data in device tree node\n");
|
|
err = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
of_node_put(np);
|
|
np = NULL;
|
|
|
|
priv->head_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels,
|
|
GFP_KERNEL);
|
|
priv->tail_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels,
|
|
GFP_KERNEL);
|
|
if (!priv->head_lock || !priv->tail_lock) {
|
|
dev_err(dev, "failed to allocate fifo locks\n");
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
for (i = 0; i < priv->num_channels; i++) {
|
|
spin_lock_init(&priv->head_lock[i]);
|
|
spin_lock_init(&priv->tail_lock[i]);
|
|
}
|
|
|
|
priv->fifo = kmalloc(sizeof(struct talitos_request *) *
|
|
priv->num_channels, GFP_KERNEL);
|
|
if (!priv->fifo) {
|
|
dev_err(dev, "failed to allocate request fifo\n");
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
|
|
|
|
for (i = 0; i < priv->num_channels; i++) {
|
|
priv->fifo[i] = kzalloc(sizeof(struct talitos_request) *
|
|
priv->fifo_len, GFP_KERNEL);
|
|
if (!priv->fifo[i]) {
|
|
dev_err(dev, "failed to allocate request fifo %d\n", i);
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);
|
|
priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);
|
|
if (!priv->head || !priv->tail) {
|
|
dev_err(dev, "failed to allocate request index space\n");
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
/* reset and initialize the h/w */
|
|
err = init_device(dev);
|
|
if (err) {
|
|
dev_err(dev, "failed to initialize device\n");
|
|
goto err_out;
|
|
}
|
|
|
|
/* register the RNG, if available */
|
|
if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
|
|
err = talitos_register_rng(dev);
|
|
if (err) {
|
|
dev_err(dev, "failed to register hwrng: %d\n", err);
|
|
goto err_out;
|
|
} else
|
|
dev_info(dev, "hwrng\n");
|
|
}
|
|
|
|
/* register crypto algorithms the device supports */
|
|
INIT_LIST_HEAD(&priv->alg_list);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
|
|
if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
|
|
struct talitos_crypto_alg *t_alg;
|
|
|
|
t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
|
|
if (IS_ERR(t_alg)) {
|
|
err = PTR_ERR(t_alg);
|
|
goto err_out;
|
|
}
|
|
|
|
err = crypto_register_alg(&t_alg->crypto_alg);
|
|
if (err) {
|
|
dev_err(dev, "%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);
|
|
dev_info(dev, "%s\n",
|
|
t_alg->crypto_alg.cra_driver_name);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
talitos_remove(ofdev);
|
|
if (np)
|
|
of_node_put(np);
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct of_device_id talitos_match[] = {
|
|
{
|
|
.compatible = "fsl,sec2.0",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, talitos_match);
|
|
|
|
static struct of_platform_driver talitos_driver = {
|
|
.name = "talitos",
|
|
.match_table = talitos_match,
|
|
.probe = talitos_probe,
|
|
.remove = __devexit_p(talitos_remove),
|
|
};
|
|
|
|
static int __init talitos_init(void)
|
|
{
|
|
return of_register_platform_driver(&talitos_driver);
|
|
}
|
|
module_init(talitos_init);
|
|
|
|
static void __exit talitos_exit(void)
|
|
{
|
|
of_unregister_platform_driver(&talitos_driver);
|
|
}
|
|
module_exit(talitos_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
|
|
MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");
|