mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Eric Biggers](/assets/img/avatar_default.png)
Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2273 lines
54 KiB
C
2273 lines
54 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Cryptographic API.
|
|
*
|
|
* Support for OMAP SHA1/MD5 HW acceleration.
|
|
*
|
|
* Copyright (c) 2010 Nokia Corporation
|
|
* Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
|
|
* Copyright (c) 2011 Texas Instruments Incorporated
|
|
*
|
|
* Some ideas are from old omap-sha1-md5.c driver.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "%s: " fmt, __func__
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/crypto.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/sha1.h>
|
|
#include <crypto/sha2.h>
|
|
#include <crypto/hash.h>
|
|
#include <crypto/hmac.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/engine.h>
|
|
|
|
#define MD5_DIGEST_SIZE 16
|
|
|
|
#define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04))
|
|
#define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04))
|
|
#define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs)
|
|
|
|
#define SHA_REG_ODIGEST(dd, x) ((dd)->pdata->odigest_ofs + (x * 0x04))
|
|
|
|
#define SHA_REG_CTRL 0x18
|
|
#define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5)
|
|
#define SHA_REG_CTRL_CLOSE_HASH (1 << 4)
|
|
#define SHA_REG_CTRL_ALGO_CONST (1 << 3)
|
|
#define SHA_REG_CTRL_ALGO (1 << 2)
|
|
#define SHA_REG_CTRL_INPUT_READY (1 << 1)
|
|
#define SHA_REG_CTRL_OUTPUT_READY (1 << 0)
|
|
|
|
#define SHA_REG_REV(dd) ((dd)->pdata->rev_ofs)
|
|
|
|
#define SHA_REG_MASK(dd) ((dd)->pdata->mask_ofs)
|
|
#define SHA_REG_MASK_DMA_EN (1 << 3)
|
|
#define SHA_REG_MASK_IT_EN (1 << 2)
|
|
#define SHA_REG_MASK_SOFTRESET (1 << 1)
|
|
#define SHA_REG_AUTOIDLE (1 << 0)
|
|
|
|
#define SHA_REG_SYSSTATUS(dd) ((dd)->pdata->sysstatus_ofs)
|
|
#define SHA_REG_SYSSTATUS_RESETDONE (1 << 0)
|
|
|
|
#define SHA_REG_MODE(dd) ((dd)->pdata->mode_ofs)
|
|
#define SHA_REG_MODE_HMAC_OUTER_HASH (1 << 7)
|
|
#define SHA_REG_MODE_HMAC_KEY_PROC (1 << 5)
|
|
#define SHA_REG_MODE_CLOSE_HASH (1 << 4)
|
|
#define SHA_REG_MODE_ALGO_CONSTANT (1 << 3)
|
|
|
|
#define SHA_REG_MODE_ALGO_MASK (7 << 0)
|
|
#define SHA_REG_MODE_ALGO_MD5_128 (0 << 1)
|
|
#define SHA_REG_MODE_ALGO_SHA1_160 (1 << 1)
|
|
#define SHA_REG_MODE_ALGO_SHA2_224 (2 << 1)
|
|
#define SHA_REG_MODE_ALGO_SHA2_256 (3 << 1)
|
|
#define SHA_REG_MODE_ALGO_SHA2_384 (1 << 0)
|
|
#define SHA_REG_MODE_ALGO_SHA2_512 (3 << 0)
|
|
|
|
#define SHA_REG_LENGTH(dd) ((dd)->pdata->length_ofs)
|
|
|
|
#define SHA_REG_IRQSTATUS 0x118
|
|
#define SHA_REG_IRQSTATUS_CTX_RDY (1 << 3)
|
|
#define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2)
|
|
#define SHA_REG_IRQSTATUS_INPUT_RDY (1 << 1)
|
|
#define SHA_REG_IRQSTATUS_OUTPUT_RDY (1 << 0)
|
|
|
|
#define SHA_REG_IRQENA 0x11C
|
|
#define SHA_REG_IRQENA_CTX_RDY (1 << 3)
|
|
#define SHA_REG_IRQENA_PARTHASH_RDY (1 << 2)
|
|
#define SHA_REG_IRQENA_INPUT_RDY (1 << 1)
|
|
#define SHA_REG_IRQENA_OUTPUT_RDY (1 << 0)
|
|
|
|
#define DEFAULT_TIMEOUT_INTERVAL HZ
|
|
|
|
#define DEFAULT_AUTOSUSPEND_DELAY 1000
|
|
|
|
/* mostly device flags */
|
|
#define FLAGS_FINAL 1
|
|
#define FLAGS_DMA_ACTIVE 2
|
|
#define FLAGS_OUTPUT_READY 3
|
|
#define FLAGS_INIT 4
|
|
#define FLAGS_CPU 5
|
|
#define FLAGS_DMA_READY 6
|
|
#define FLAGS_AUTO_XOR 7
|
|
#define FLAGS_BE32_SHA1 8
|
|
#define FLAGS_SGS_COPIED 9
|
|
#define FLAGS_SGS_ALLOCED 10
|
|
#define FLAGS_HUGE 11
|
|
|
|
/* context flags */
|
|
#define FLAGS_FINUP 16
|
|
|
|
#define FLAGS_MODE_SHIFT 18
|
|
#define FLAGS_MODE_MASK (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_MD5 (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_SHA1 (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_SHA224 (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_SHA256 (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_SHA384 (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
|
|
#define FLAGS_MODE_SHA512 (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
|
|
|
|
#define FLAGS_HMAC 21
|
|
#define FLAGS_ERROR 22
|
|
|
|
#define OP_UPDATE 1
|
|
#define OP_FINAL 2
|
|
|
|
#define OMAP_ALIGN_MASK (sizeof(u32)-1)
|
|
#define OMAP_ALIGNED __attribute__((aligned(sizeof(u32))))
|
|
|
|
#define BUFLEN SHA512_BLOCK_SIZE
|
|
#define OMAP_SHA_DMA_THRESHOLD 256
|
|
|
|
#define OMAP_SHA_MAX_DMA_LEN (1024 * 2048)
|
|
|
|
struct omap_sham_dev;
|
|
|
|
struct omap_sham_reqctx {
|
|
struct omap_sham_dev *dd;
|
|
unsigned long flags;
|
|
u8 op;
|
|
|
|
u8 digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED;
|
|
size_t digcnt;
|
|
size_t bufcnt;
|
|
size_t buflen;
|
|
|
|
/* walk state */
|
|
struct scatterlist *sg;
|
|
struct scatterlist sgl[2];
|
|
int offset; /* offset in current sg */
|
|
int sg_len;
|
|
unsigned int total; /* total request */
|
|
|
|
u8 buffer[] OMAP_ALIGNED;
|
|
};
|
|
|
|
struct omap_sham_hmac_ctx {
|
|
struct crypto_shash *shash;
|
|
u8 ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
|
|
u8 opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
|
|
};
|
|
|
|
struct omap_sham_ctx {
|
|
struct crypto_engine_ctx enginectx;
|
|
unsigned long flags;
|
|
|
|
/* fallback stuff */
|
|
struct crypto_shash *fallback;
|
|
|
|
struct omap_sham_hmac_ctx base[];
|
|
};
|
|
|
|
#define OMAP_SHAM_QUEUE_LENGTH 10
|
|
|
|
struct omap_sham_algs_info {
|
|
struct ahash_alg *algs_list;
|
|
unsigned int size;
|
|
unsigned int registered;
|
|
};
|
|
|
|
struct omap_sham_pdata {
|
|
struct omap_sham_algs_info *algs_info;
|
|
unsigned int algs_info_size;
|
|
unsigned long flags;
|
|
int digest_size;
|
|
|
|
void (*copy_hash)(struct ahash_request *req, int out);
|
|
void (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
|
|
int final, int dma);
|
|
void (*trigger)(struct omap_sham_dev *dd, size_t length);
|
|
int (*poll_irq)(struct omap_sham_dev *dd);
|
|
irqreturn_t (*intr_hdlr)(int irq, void *dev_id);
|
|
|
|
u32 odigest_ofs;
|
|
u32 idigest_ofs;
|
|
u32 din_ofs;
|
|
u32 digcnt_ofs;
|
|
u32 rev_ofs;
|
|
u32 mask_ofs;
|
|
u32 sysstatus_ofs;
|
|
u32 mode_ofs;
|
|
u32 length_ofs;
|
|
|
|
u32 major_mask;
|
|
u32 major_shift;
|
|
u32 minor_mask;
|
|
u32 minor_shift;
|
|
};
|
|
|
|
struct omap_sham_dev {
|
|
struct list_head list;
|
|
unsigned long phys_base;
|
|
struct device *dev;
|
|
void __iomem *io_base;
|
|
int irq;
|
|
int err;
|
|
struct dma_chan *dma_lch;
|
|
struct tasklet_struct done_task;
|
|
u8 polling_mode;
|
|
u8 xmit_buf[BUFLEN] OMAP_ALIGNED;
|
|
|
|
unsigned long flags;
|
|
int fallback_sz;
|
|
struct crypto_queue queue;
|
|
struct ahash_request *req;
|
|
struct crypto_engine *engine;
|
|
|
|
const struct omap_sham_pdata *pdata;
|
|
};
|
|
|
|
struct omap_sham_drv {
|
|
struct list_head dev_list;
|
|
spinlock_t lock;
|
|
unsigned long flags;
|
|
};
|
|
|
|
static struct omap_sham_drv sham = {
|
|
.dev_list = LIST_HEAD_INIT(sham.dev_list),
|
|
.lock = __SPIN_LOCK_UNLOCKED(sham.lock),
|
|
};
|
|
|
|
static int omap_sham_enqueue(struct ahash_request *req, unsigned int op);
|
|
static void omap_sham_finish_req(struct ahash_request *req, int err);
|
|
|
|
static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset)
|
|
{
|
|
return __raw_readl(dd->io_base + offset);
|
|
}
|
|
|
|
static inline void omap_sham_write(struct omap_sham_dev *dd,
|
|
u32 offset, u32 value)
|
|
{
|
|
__raw_writel(value, dd->io_base + offset);
|
|
}
|
|
|
|
static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address,
|
|
u32 value, u32 mask)
|
|
{
|
|
u32 val;
|
|
|
|
val = omap_sham_read(dd, address);
|
|
val &= ~mask;
|
|
val |= value;
|
|
omap_sham_write(dd, address, val);
|
|
}
|
|
|
|
static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
|
|
{
|
|
unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;
|
|
|
|
while (!(omap_sham_read(dd, offset) & bit)) {
|
|
if (time_is_before_jiffies(timeout))
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
u32 *hash = (u32 *)ctx->digest;
|
|
int i;
|
|
|
|
for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
|
|
if (out)
|
|
hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i));
|
|
else
|
|
omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]);
|
|
}
|
|
}
|
|
|
|
static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
int i;
|
|
|
|
if (ctx->flags & BIT(FLAGS_HMAC)) {
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
|
|
struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
u32 *opad = (u32 *)bctx->opad;
|
|
|
|
for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
|
|
if (out)
|
|
opad[i] = omap_sham_read(dd,
|
|
SHA_REG_ODIGEST(dd, i));
|
|
else
|
|
omap_sham_write(dd, SHA_REG_ODIGEST(dd, i),
|
|
opad[i]);
|
|
}
|
|
}
|
|
|
|
omap_sham_copy_hash_omap2(req, out);
|
|
}
|
|
|
|
static void omap_sham_copy_ready_hash(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
u32 *in = (u32 *)ctx->digest;
|
|
u32 *hash = (u32 *)req->result;
|
|
int i, d, big_endian = 0;
|
|
|
|
if (!hash)
|
|
return;
|
|
|
|
switch (ctx->flags & FLAGS_MODE_MASK) {
|
|
case FLAGS_MODE_MD5:
|
|
d = MD5_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
case FLAGS_MODE_SHA1:
|
|
/* OMAP2 SHA1 is big endian */
|
|
if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags))
|
|
big_endian = 1;
|
|
d = SHA1_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
case FLAGS_MODE_SHA224:
|
|
d = SHA224_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
case FLAGS_MODE_SHA256:
|
|
d = SHA256_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
case FLAGS_MODE_SHA384:
|
|
d = SHA384_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
case FLAGS_MODE_SHA512:
|
|
d = SHA512_DIGEST_SIZE / sizeof(u32);
|
|
break;
|
|
default:
|
|
d = 0;
|
|
}
|
|
|
|
if (big_endian)
|
|
for (i = 0; i < d; i++)
|
|
hash[i] = be32_to_cpup((__be32 *)in + i);
|
|
else
|
|
for (i = 0; i < d; i++)
|
|
hash[i] = le32_to_cpup((__le32 *)in + i);
|
|
}
|
|
|
|
static int omap_sham_hw_init(struct omap_sham_dev *dd)
|
|
{
|
|
int err;
|
|
|
|
err = pm_runtime_get_sync(dd->dev);
|
|
if (err < 0) {
|
|
dev_err(dd->dev, "failed to get sync: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if (!test_bit(FLAGS_INIT, &dd->flags)) {
|
|
set_bit(FLAGS_INIT, &dd->flags);
|
|
dd->err = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
|
|
int final, int dma)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
|
|
u32 val = length << 5, mask;
|
|
|
|
if (likely(ctx->digcnt))
|
|
omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
|
|
|
|
omap_sham_write_mask(dd, SHA_REG_MASK(dd),
|
|
SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
|
|
SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
|
|
/*
|
|
* Setting ALGO_CONST only for the first iteration
|
|
* and CLOSE_HASH only for the last one.
|
|
*/
|
|
if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
|
|
val |= SHA_REG_CTRL_ALGO;
|
|
if (!ctx->digcnt)
|
|
val |= SHA_REG_CTRL_ALGO_CONST;
|
|
if (final)
|
|
val |= SHA_REG_CTRL_CLOSE_HASH;
|
|
|
|
mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
|
|
SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
|
|
|
|
omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
|
|
}
|
|
|
|
static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
|
|
{
|
|
}
|
|
|
|
static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
|
|
{
|
|
return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
|
|
}
|
|
|
|
static int get_block_size(struct omap_sham_reqctx *ctx)
|
|
{
|
|
int d;
|
|
|
|
switch (ctx->flags & FLAGS_MODE_MASK) {
|
|
case FLAGS_MODE_MD5:
|
|
case FLAGS_MODE_SHA1:
|
|
d = SHA1_BLOCK_SIZE;
|
|
break;
|
|
case FLAGS_MODE_SHA224:
|
|
case FLAGS_MODE_SHA256:
|
|
d = SHA256_BLOCK_SIZE;
|
|
break;
|
|
case FLAGS_MODE_SHA384:
|
|
case FLAGS_MODE_SHA512:
|
|
d = SHA512_BLOCK_SIZE;
|
|
break;
|
|
default:
|
|
d = 0;
|
|
}
|
|
|
|
return d;
|
|
}
|
|
|
|
static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
|
|
u32 *value, int count)
|
|
{
|
|
for (; count--; value++, offset += 4)
|
|
omap_sham_write(dd, offset, *value);
|
|
}
|
|
|
|
static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
|
|
int final, int dma)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
|
|
u32 val, mask;
|
|
|
|
if (likely(ctx->digcnt))
|
|
omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
|
|
|
|
/*
|
|
* Setting ALGO_CONST only for the first iteration and
|
|
* CLOSE_HASH only for the last one. Note that flags mode bits
|
|
* correspond to algorithm encoding in mode register.
|
|
*/
|
|
val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
|
|
if (!ctx->digcnt) {
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
|
|
struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
int bs, nr_dr;
|
|
|
|
val |= SHA_REG_MODE_ALGO_CONSTANT;
|
|
|
|
if (ctx->flags & BIT(FLAGS_HMAC)) {
|
|
bs = get_block_size(ctx);
|
|
nr_dr = bs / (2 * sizeof(u32));
|
|
val |= SHA_REG_MODE_HMAC_KEY_PROC;
|
|
omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
|
|
(u32 *)bctx->ipad, nr_dr);
|
|
omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
|
|
(u32 *)bctx->ipad + nr_dr, nr_dr);
|
|
ctx->digcnt += bs;
|
|
}
|
|
}
|
|
|
|
if (final) {
|
|
val |= SHA_REG_MODE_CLOSE_HASH;
|
|
|
|
if (ctx->flags & BIT(FLAGS_HMAC))
|
|
val |= SHA_REG_MODE_HMAC_OUTER_HASH;
|
|
}
|
|
|
|
mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
|
|
SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
|
|
SHA_REG_MODE_HMAC_KEY_PROC;
|
|
|
|
dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
|
|
omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
|
|
omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
|
|
omap_sham_write_mask(dd, SHA_REG_MASK(dd),
|
|
SHA_REG_MASK_IT_EN |
|
|
(dma ? SHA_REG_MASK_DMA_EN : 0),
|
|
SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
|
|
}
|
|
|
|
static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
|
|
{
|
|
omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
|
|
}
|
|
|
|
static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
|
|
{
|
|
return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
|
|
SHA_REG_IRQSTATUS_INPUT_RDY);
|
|
}
|
|
|
|
static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, size_t length,
|
|
int final)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
|
|
int count, len32, bs32, offset = 0;
|
|
const u32 *buffer;
|
|
int mlen;
|
|
struct sg_mapping_iter mi;
|
|
|
|
dev_dbg(dd->dev, "xmit_cpu: digcnt: %zd, length: %zd, final: %d\n",
|
|
ctx->digcnt, length, final);
|
|
|
|
dd->pdata->write_ctrl(dd, length, final, 0);
|
|
dd->pdata->trigger(dd, length);
|
|
|
|
/* should be non-zero before next lines to disable clocks later */
|
|
ctx->digcnt += length;
|
|
ctx->total -= length;
|
|
|
|
if (final)
|
|
set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
|
|
|
|
set_bit(FLAGS_CPU, &dd->flags);
|
|
|
|
len32 = DIV_ROUND_UP(length, sizeof(u32));
|
|
bs32 = get_block_size(ctx) / sizeof(u32);
|
|
|
|
sg_miter_start(&mi, ctx->sg, ctx->sg_len,
|
|
SG_MITER_FROM_SG | SG_MITER_ATOMIC);
|
|
|
|
mlen = 0;
|
|
|
|
while (len32) {
|
|
if (dd->pdata->poll_irq(dd))
|
|
return -ETIMEDOUT;
|
|
|
|
for (count = 0; count < min(len32, bs32); count++, offset++) {
|
|
if (!mlen) {
|
|
sg_miter_next(&mi);
|
|
mlen = mi.length;
|
|
if (!mlen) {
|
|
pr_err("sg miter failure.\n");
|
|
return -EINVAL;
|
|
}
|
|
offset = 0;
|
|
buffer = mi.addr;
|
|
}
|
|
omap_sham_write(dd, SHA_REG_DIN(dd, count),
|
|
buffer[offset]);
|
|
mlen -= 4;
|
|
}
|
|
len32 -= min(len32, bs32);
|
|
}
|
|
|
|
sg_miter_stop(&mi);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static void omap_sham_dma_callback(void *param)
|
|
{
|
|
struct omap_sham_dev *dd = param;
|
|
|
|
set_bit(FLAGS_DMA_READY, &dd->flags);
|
|
tasklet_schedule(&dd->done_task);
|
|
}
|
|
|
|
static int omap_sham_xmit_dma(struct omap_sham_dev *dd, size_t length,
|
|
int final)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
|
|
struct dma_async_tx_descriptor *tx;
|
|
struct dma_slave_config cfg;
|
|
int ret;
|
|
|
|
dev_dbg(dd->dev, "xmit_dma: digcnt: %zd, length: %zd, final: %d\n",
|
|
ctx->digcnt, length, final);
|
|
|
|
if (!dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE)) {
|
|
dev_err(dd->dev, "dma_map_sg error\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&cfg, 0, sizeof(cfg));
|
|
|
|
cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
|
|
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
cfg.dst_maxburst = get_block_size(ctx) / DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
|
|
ret = dmaengine_slave_config(dd->dma_lch, &cfg);
|
|
if (ret) {
|
|
pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
tx = dmaengine_prep_slave_sg(dd->dma_lch, ctx->sg, ctx->sg_len,
|
|
DMA_MEM_TO_DEV,
|
|
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
|
|
|
|
if (!tx) {
|
|
dev_err(dd->dev, "prep_slave_sg failed\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tx->callback = omap_sham_dma_callback;
|
|
tx->callback_param = dd;
|
|
|
|
dd->pdata->write_ctrl(dd, length, final, 1);
|
|
|
|
ctx->digcnt += length;
|
|
ctx->total -= length;
|
|
|
|
if (final)
|
|
set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
|
|
|
|
set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
|
|
|
|
dmaengine_submit(tx);
|
|
dma_async_issue_pending(dd->dma_lch);
|
|
|
|
dd->pdata->trigger(dd, length);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx,
|
|
struct scatterlist *sg, int bs, int new_len)
|
|
{
|
|
int n = sg_nents(sg);
|
|
struct scatterlist *tmp;
|
|
int offset = ctx->offset;
|
|
|
|
ctx->total = new_len;
|
|
|
|
if (ctx->bufcnt)
|
|
n++;
|
|
|
|
ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
|
|
if (!ctx->sg)
|
|
return -ENOMEM;
|
|
|
|
sg_init_table(ctx->sg, n);
|
|
|
|
tmp = ctx->sg;
|
|
|
|
ctx->sg_len = 0;
|
|
|
|
if (ctx->bufcnt) {
|
|
sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt);
|
|
tmp = sg_next(tmp);
|
|
ctx->sg_len++;
|
|
new_len -= ctx->bufcnt;
|
|
}
|
|
|
|
while (sg && new_len) {
|
|
int len = sg->length - offset;
|
|
|
|
if (len <= 0) {
|
|
offset -= sg->length;
|
|
sg = sg_next(sg);
|
|
continue;
|
|
}
|
|
|
|
if (new_len < len)
|
|
len = new_len;
|
|
|
|
if (len > 0) {
|
|
new_len -= len;
|
|
sg_set_page(tmp, sg_page(sg), len, sg->offset + offset);
|
|
offset = 0;
|
|
ctx->offset = 0;
|
|
ctx->sg_len++;
|
|
if (new_len <= 0)
|
|
break;
|
|
tmp = sg_next(tmp);
|
|
}
|
|
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
if (tmp)
|
|
sg_mark_end(tmp);
|
|
|
|
set_bit(FLAGS_SGS_ALLOCED, &ctx->dd->flags);
|
|
|
|
ctx->offset += new_len - ctx->bufcnt;
|
|
ctx->bufcnt = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_copy_sgs(struct omap_sham_reqctx *ctx,
|
|
struct scatterlist *sg, int bs,
|
|
unsigned int new_len)
|
|
{
|
|
int pages;
|
|
void *buf;
|
|
|
|
pages = get_order(new_len);
|
|
|
|
buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
|
|
if (!buf) {
|
|
pr_err("Couldn't allocate pages for unaligned cases.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (ctx->bufcnt)
|
|
memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt);
|
|
|
|
scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->offset,
|
|
min(new_len, ctx->total) - ctx->bufcnt, 0);
|
|
sg_init_table(ctx->sgl, 1);
|
|
sg_set_buf(ctx->sgl, buf, new_len);
|
|
ctx->sg = ctx->sgl;
|
|
set_bit(FLAGS_SGS_COPIED, &ctx->dd->flags);
|
|
ctx->sg_len = 1;
|
|
ctx->offset += new_len - ctx->bufcnt;
|
|
ctx->bufcnt = 0;
|
|
ctx->total = new_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_align_sgs(struct scatterlist *sg,
|
|
int nbytes, int bs, bool final,
|
|
struct omap_sham_reqctx *rctx)
|
|
{
|
|
int n = 0;
|
|
bool aligned = true;
|
|
bool list_ok = true;
|
|
struct scatterlist *sg_tmp = sg;
|
|
int new_len;
|
|
int offset = rctx->offset;
|
|
int bufcnt = rctx->bufcnt;
|
|
|
|
if (!sg || !sg->length || !nbytes) {
|
|
if (bufcnt) {
|
|
bufcnt = DIV_ROUND_UP(bufcnt, bs) * bs;
|
|
sg_init_table(rctx->sgl, 1);
|
|
sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, bufcnt);
|
|
rctx->sg = rctx->sgl;
|
|
rctx->sg_len = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
new_len = nbytes;
|
|
|
|
if (offset)
|
|
list_ok = false;
|
|
|
|
if (final)
|
|
new_len = DIV_ROUND_UP(new_len, bs) * bs;
|
|
else
|
|
new_len = (new_len - 1) / bs * bs;
|
|
|
|
if (!new_len)
|
|
return 0;
|
|
|
|
if (nbytes != new_len)
|
|
list_ok = false;
|
|
|
|
while (nbytes > 0 && sg_tmp) {
|
|
n++;
|
|
|
|
if (bufcnt) {
|
|
if (!IS_ALIGNED(bufcnt, bs)) {
|
|
aligned = false;
|
|
break;
|
|
}
|
|
nbytes -= bufcnt;
|
|
bufcnt = 0;
|
|
if (!nbytes)
|
|
list_ok = false;
|
|
|
|
continue;
|
|
}
|
|
|
|
#ifdef CONFIG_ZONE_DMA
|
|
if (page_zonenum(sg_page(sg_tmp)) != ZONE_DMA) {
|
|
aligned = false;
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
if (offset < sg_tmp->length) {
|
|
if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
|
|
aligned = false;
|
|
break;
|
|
}
|
|
|
|
if (!IS_ALIGNED(sg_tmp->length - offset, bs)) {
|
|
aligned = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (offset) {
|
|
offset -= sg_tmp->length;
|
|
if (offset < 0) {
|
|
nbytes += offset;
|
|
offset = 0;
|
|
}
|
|
} else {
|
|
nbytes -= sg_tmp->length;
|
|
}
|
|
|
|
sg_tmp = sg_next(sg_tmp);
|
|
|
|
if (nbytes < 0) {
|
|
list_ok = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (new_len > OMAP_SHA_MAX_DMA_LEN) {
|
|
new_len = OMAP_SHA_MAX_DMA_LEN;
|
|
aligned = false;
|
|
}
|
|
|
|
if (!aligned)
|
|
return omap_sham_copy_sgs(rctx, sg, bs, new_len);
|
|
else if (!list_ok)
|
|
return omap_sham_copy_sg_lists(rctx, sg, bs, new_len);
|
|
|
|
rctx->total = new_len;
|
|
rctx->offset += new_len;
|
|
rctx->sg_len = n;
|
|
if (rctx->bufcnt) {
|
|
sg_init_table(rctx->sgl, 2);
|
|
sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt);
|
|
sg_chain(rctx->sgl, 2, sg);
|
|
rctx->sg = rctx->sgl;
|
|
} else {
|
|
rctx->sg = sg;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_prepare_request(struct crypto_engine *engine, void *areq)
|
|
{
|
|
struct ahash_request *req = container_of(areq, struct ahash_request,
|
|
base);
|
|
struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
|
|
int bs;
|
|
int ret;
|
|
unsigned int nbytes;
|
|
bool final = rctx->flags & BIT(FLAGS_FINUP);
|
|
bool update = rctx->op == OP_UPDATE;
|
|
int hash_later;
|
|
|
|
bs = get_block_size(rctx);
|
|
|
|
nbytes = rctx->bufcnt;
|
|
|
|
if (update)
|
|
nbytes += req->nbytes - rctx->offset;
|
|
|
|
dev_dbg(rctx->dd->dev,
|
|
"%s: nbytes=%d, bs=%d, total=%d, offset=%d, bufcnt=%zd\n",
|
|
__func__, nbytes, bs, rctx->total, rctx->offset,
|
|
rctx->bufcnt);
|
|
|
|
if (!nbytes)
|
|
return 0;
|
|
|
|
rctx->total = nbytes;
|
|
|
|
if (update && req->nbytes && (!IS_ALIGNED(rctx->bufcnt, bs))) {
|
|
int len = bs - rctx->bufcnt % bs;
|
|
|
|
if (len > req->nbytes)
|
|
len = req->nbytes;
|
|
scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src,
|
|
0, len, 0);
|
|
rctx->bufcnt += len;
|
|
rctx->offset = len;
|
|
}
|
|
|
|
if (rctx->bufcnt)
|
|
memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt);
|
|
|
|
ret = omap_sham_align_sgs(req->src, nbytes, bs, final, rctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
hash_later = nbytes - rctx->total;
|
|
if (hash_later < 0)
|
|
hash_later = 0;
|
|
|
|
if (hash_later && hash_later <= rctx->buflen) {
|
|
scatterwalk_map_and_copy(rctx->buffer,
|
|
req->src,
|
|
req->nbytes - hash_later,
|
|
hash_later, 0);
|
|
|
|
rctx->bufcnt = hash_later;
|
|
} else {
|
|
rctx->bufcnt = 0;
|
|
}
|
|
|
|
if (hash_later > rctx->buflen)
|
|
set_bit(FLAGS_HUGE, &rctx->dd->flags);
|
|
|
|
rctx->total = min(nbytes, rctx->total);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
|
|
|
|
dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
|
|
|
|
clear_bit(FLAGS_DMA_ACTIVE, &dd->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct omap_sham_dev *omap_sham_find_dev(struct omap_sham_reqctx *ctx)
|
|
{
|
|
struct omap_sham_dev *dd;
|
|
|
|
if (ctx->dd)
|
|
return ctx->dd;
|
|
|
|
spin_lock_bh(&sham.lock);
|
|
dd = list_first_entry(&sham.dev_list, struct omap_sham_dev, list);
|
|
list_move_tail(&dd->list, &sham.dev_list);
|
|
ctx->dd = dd;
|
|
spin_unlock_bh(&sham.lock);
|
|
|
|
return dd;
|
|
}
|
|
|
|
static int omap_sham_init(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd;
|
|
int bs = 0;
|
|
|
|
ctx->dd = NULL;
|
|
|
|
dd = omap_sham_find_dev(ctx);
|
|
if (!dd)
|
|
return -ENODEV;
|
|
|
|
ctx->flags = 0;
|
|
|
|
dev_dbg(dd->dev, "init: digest size: %d\n",
|
|
crypto_ahash_digestsize(tfm));
|
|
|
|
switch (crypto_ahash_digestsize(tfm)) {
|
|
case MD5_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_MD5;
|
|
bs = SHA1_BLOCK_SIZE;
|
|
break;
|
|
case SHA1_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_SHA1;
|
|
bs = SHA1_BLOCK_SIZE;
|
|
break;
|
|
case SHA224_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_SHA224;
|
|
bs = SHA224_BLOCK_SIZE;
|
|
break;
|
|
case SHA256_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_SHA256;
|
|
bs = SHA256_BLOCK_SIZE;
|
|
break;
|
|
case SHA384_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_SHA384;
|
|
bs = SHA384_BLOCK_SIZE;
|
|
break;
|
|
case SHA512_DIGEST_SIZE:
|
|
ctx->flags |= FLAGS_MODE_SHA512;
|
|
bs = SHA512_BLOCK_SIZE;
|
|
break;
|
|
}
|
|
|
|
ctx->bufcnt = 0;
|
|
ctx->digcnt = 0;
|
|
ctx->total = 0;
|
|
ctx->offset = 0;
|
|
ctx->buflen = BUFLEN;
|
|
|
|
if (tctx->flags & BIT(FLAGS_HMAC)) {
|
|
if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
|
|
memcpy(ctx->buffer, bctx->ipad, bs);
|
|
ctx->bufcnt = bs;
|
|
}
|
|
|
|
ctx->flags |= BIT(FLAGS_HMAC);
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int omap_sham_update_req(struct omap_sham_dev *dd)
|
|
{
|
|
struct ahash_request *req = dd->req;
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
int err;
|
|
bool final = (ctx->flags & BIT(FLAGS_FINUP)) &&
|
|
!(dd->flags & BIT(FLAGS_HUGE));
|
|
|
|
dev_dbg(dd->dev, "update_req: total: %u, digcnt: %zd, final: %d",
|
|
ctx->total, ctx->digcnt, final);
|
|
|
|
if (ctx->total < get_block_size(ctx) ||
|
|
ctx->total < dd->fallback_sz)
|
|
ctx->flags |= BIT(FLAGS_CPU);
|
|
|
|
if (ctx->flags & BIT(FLAGS_CPU))
|
|
err = omap_sham_xmit_cpu(dd, ctx->total, final);
|
|
else
|
|
err = omap_sham_xmit_dma(dd, ctx->total, final);
|
|
|
|
/* wait for dma completion before can take more data */
|
|
dev_dbg(dd->dev, "update: err: %d, digcnt: %zd\n", err, ctx->digcnt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int omap_sham_final_req(struct omap_sham_dev *dd)
|
|
{
|
|
struct ahash_request *req = dd->req;
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
int err = 0, use_dma = 1;
|
|
|
|
if (dd->flags & BIT(FLAGS_HUGE))
|
|
return 0;
|
|
|
|
if ((ctx->total <= get_block_size(ctx)) || dd->polling_mode)
|
|
/*
|
|
* faster to handle last block with cpu or
|
|
* use cpu when dma is not present.
|
|
*/
|
|
use_dma = 0;
|
|
|
|
if (use_dma)
|
|
err = omap_sham_xmit_dma(dd, ctx->total, 1);
|
|
else
|
|
err = omap_sham_xmit_cpu(dd, ctx->total, 1);
|
|
|
|
ctx->bufcnt = 0;
|
|
|
|
dev_dbg(dd->dev, "final_req: err: %d\n", err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int omap_sham_hash_one_req(struct crypto_engine *engine, void *areq)
|
|
{
|
|
struct ahash_request *req = container_of(areq, struct ahash_request,
|
|
base);
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
int err;
|
|
bool final = (ctx->flags & BIT(FLAGS_FINUP)) &&
|
|
!(dd->flags & BIT(FLAGS_HUGE));
|
|
|
|
dev_dbg(dd->dev, "hash-one: op: %u, total: %u, digcnt: %zd, final: %d",
|
|
ctx->op, ctx->total, ctx->digcnt, final);
|
|
|
|
dd->req = req;
|
|
|
|
err = omap_sham_hw_init(dd);
|
|
if (err)
|
|
return err;
|
|
|
|
if (ctx->digcnt)
|
|
dd->pdata->copy_hash(req, 0);
|
|
|
|
if (ctx->op == OP_UPDATE)
|
|
err = omap_sham_update_req(dd);
|
|
else if (ctx->op == OP_FINAL)
|
|
err = omap_sham_final_req(dd);
|
|
|
|
if (err != -EINPROGRESS)
|
|
omap_sham_finish_req(req, err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_finish_hmac(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
int bs = crypto_shash_blocksize(bctx->shash);
|
|
int ds = crypto_shash_digestsize(bctx->shash);
|
|
SHASH_DESC_ON_STACK(shash, bctx->shash);
|
|
|
|
shash->tfm = bctx->shash;
|
|
|
|
return crypto_shash_init(shash) ?:
|
|
crypto_shash_update(shash, bctx->opad, bs) ?:
|
|
crypto_shash_finup(shash, req->result, ds, req->result);
|
|
}
|
|
|
|
static int omap_sham_finish(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
int err = 0;
|
|
|
|
if (ctx->digcnt) {
|
|
omap_sham_copy_ready_hash(req);
|
|
if ((ctx->flags & BIT(FLAGS_HMAC)) &&
|
|
!test_bit(FLAGS_AUTO_XOR, &dd->flags))
|
|
err = omap_sham_finish_hmac(req);
|
|
}
|
|
|
|
dev_dbg(dd->dev, "digcnt: %zd, bufcnt: %zd\n", ctx->digcnt, ctx->bufcnt);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void omap_sham_finish_req(struct ahash_request *req, int err)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
|
|
if (test_bit(FLAGS_SGS_COPIED, &dd->flags))
|
|
free_pages((unsigned long)sg_virt(ctx->sg),
|
|
get_order(ctx->sg->length));
|
|
|
|
if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags))
|
|
kfree(ctx->sg);
|
|
|
|
ctx->sg = NULL;
|
|
|
|
dd->flags &= ~(BIT(FLAGS_SGS_ALLOCED) | BIT(FLAGS_SGS_COPIED) |
|
|
BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) |
|
|
BIT(FLAGS_OUTPUT_READY));
|
|
|
|
if (!err)
|
|
dd->pdata->copy_hash(req, 1);
|
|
|
|
if (dd->flags & BIT(FLAGS_HUGE)) {
|
|
/* Re-enqueue the request */
|
|
omap_sham_enqueue(req, ctx->op);
|
|
return;
|
|
}
|
|
|
|
if (!err) {
|
|
if (test_bit(FLAGS_FINAL, &dd->flags))
|
|
err = omap_sham_finish(req);
|
|
} else {
|
|
ctx->flags |= BIT(FLAGS_ERROR);
|
|
}
|
|
|
|
/* atomic operation is not needed here */
|
|
dd->flags &= ~(BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
|
|
BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
|
|
|
|
pm_runtime_mark_last_busy(dd->dev);
|
|
pm_runtime_put_autosuspend(dd->dev);
|
|
|
|
ctx->offset = 0;
|
|
|
|
crypto_finalize_hash_request(dd->engine, req, err);
|
|
}
|
|
|
|
static int omap_sham_handle_queue(struct omap_sham_dev *dd,
|
|
struct ahash_request *req)
|
|
{
|
|
return crypto_transfer_hash_request_to_engine(dd->engine, req);
|
|
}
|
|
|
|
static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = ctx->dd;
|
|
|
|
ctx->op = op;
|
|
|
|
return omap_sham_handle_queue(dd, req);
|
|
}
|
|
|
|
static int omap_sham_update(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
struct omap_sham_dev *dd = omap_sham_find_dev(ctx);
|
|
|
|
if (!req->nbytes)
|
|
return 0;
|
|
|
|
if (ctx->bufcnt + req->nbytes <= ctx->buflen) {
|
|
scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
|
|
0, req->nbytes, 0);
|
|
ctx->bufcnt += req->nbytes;
|
|
return 0;
|
|
}
|
|
|
|
if (dd->polling_mode)
|
|
ctx->flags |= BIT(FLAGS_CPU);
|
|
|
|
return omap_sham_enqueue(req, OP_UPDATE);
|
|
}
|
|
|
|
static int omap_sham_final_shash(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
int offset = 0;
|
|
|
|
/*
|
|
* If we are running HMAC on limited hardware support, skip
|
|
* the ipad in the beginning of the buffer if we are going for
|
|
* software fallback algorithm.
|
|
*/
|
|
if (test_bit(FLAGS_HMAC, &ctx->flags) &&
|
|
!test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags))
|
|
offset = get_block_size(ctx);
|
|
|
|
return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer + offset,
|
|
ctx->bufcnt - offset, req->result);
|
|
}
|
|
|
|
static int omap_sham_final(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
|
|
ctx->flags |= BIT(FLAGS_FINUP);
|
|
|
|
if (ctx->flags & BIT(FLAGS_ERROR))
|
|
return 0; /* uncompleted hash is not needed */
|
|
|
|
/*
|
|
* OMAP HW accel works only with buffers >= 9.
|
|
* HMAC is always >= 9 because ipad == block size.
|
|
* If buffersize is less than fallback_sz, we use fallback
|
|
* SW encoding, as using DMA + HW in this case doesn't provide
|
|
* any benefit.
|
|
*/
|
|
if (!ctx->digcnt && ctx->bufcnt < ctx->dd->fallback_sz)
|
|
return omap_sham_final_shash(req);
|
|
else if (ctx->bufcnt)
|
|
return omap_sham_enqueue(req, OP_FINAL);
|
|
|
|
/* copy ready hash (+ finalize hmac) */
|
|
return omap_sham_finish(req);
|
|
}
|
|
|
|
static int omap_sham_finup(struct ahash_request *req)
|
|
{
|
|
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
|
|
int err1, err2;
|
|
|
|
ctx->flags |= BIT(FLAGS_FINUP);
|
|
|
|
err1 = omap_sham_update(req);
|
|
if (err1 == -EINPROGRESS || err1 == -EBUSY)
|
|
return err1;
|
|
/*
|
|
* final() has to be always called to cleanup resources
|
|
* even if udpate() failed, except EINPROGRESS
|
|
*/
|
|
err2 = omap_sham_final(req);
|
|
|
|
return err1 ?: err2;
|
|
}
|
|
|
|
static int omap_sham_digest(struct ahash_request *req)
|
|
{
|
|
return omap_sham_init(req) ?: omap_sham_finup(req);
|
|
}
|
|
|
|
static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
int bs = crypto_shash_blocksize(bctx->shash);
|
|
int ds = crypto_shash_digestsize(bctx->shash);
|
|
int err, i;
|
|
|
|
err = crypto_shash_setkey(tctx->fallback, key, keylen);
|
|
if (err)
|
|
return err;
|
|
|
|
if (keylen > bs) {
|
|
err = crypto_shash_tfm_digest(bctx->shash, key, keylen,
|
|
bctx->ipad);
|
|
if (err)
|
|
return err;
|
|
keylen = ds;
|
|
} else {
|
|
memcpy(bctx->ipad, key, keylen);
|
|
}
|
|
|
|
memset(bctx->ipad + keylen, 0, bs - keylen);
|
|
|
|
if (!test_bit(FLAGS_AUTO_XOR, &sham.flags)) {
|
|
memcpy(bctx->opad, bctx->ipad, bs);
|
|
|
|
for (i = 0; i < bs; i++) {
|
|
bctx->ipad[i] ^= HMAC_IPAD_VALUE;
|
|
bctx->opad[i] ^= HMAC_OPAD_VALUE;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
|
|
{
|
|
struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
|
|
const char *alg_name = crypto_tfm_alg_name(tfm);
|
|
|
|
/* Allocate a fallback and abort if it failed. */
|
|
tctx->fallback = crypto_alloc_shash(alg_name, 0,
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
|
if (IS_ERR(tctx->fallback)) {
|
|
pr_err("omap-sham: fallback driver '%s' "
|
|
"could not be loaded.\n", alg_name);
|
|
return PTR_ERR(tctx->fallback);
|
|
}
|
|
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct omap_sham_reqctx) + BUFLEN);
|
|
|
|
if (alg_base) {
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
tctx->flags |= BIT(FLAGS_HMAC);
|
|
bctx->shash = crypto_alloc_shash(alg_base, 0,
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
|
if (IS_ERR(bctx->shash)) {
|
|
pr_err("omap-sham: base driver '%s' "
|
|
"could not be loaded.\n", alg_base);
|
|
crypto_free_shash(tctx->fallback);
|
|
return PTR_ERR(bctx->shash);
|
|
}
|
|
|
|
}
|
|
|
|
tctx->enginectx.op.do_one_request = omap_sham_hash_one_req;
|
|
tctx->enginectx.op.prepare_request = omap_sham_prepare_request;
|
|
tctx->enginectx.op.unprepare_request = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_cra_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, NULL);
|
|
}
|
|
|
|
static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "sha1");
|
|
}
|
|
|
|
static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "sha224");
|
|
}
|
|
|
|
static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "sha256");
|
|
}
|
|
|
|
static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "md5");
|
|
}
|
|
|
|
static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "sha384");
|
|
}
|
|
|
|
static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
|
|
{
|
|
return omap_sham_cra_init_alg(tfm, "sha512");
|
|
}
|
|
|
|
static void omap_sham_cra_exit(struct crypto_tfm *tfm)
|
|
{
|
|
struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
|
|
|
|
crypto_free_shash(tctx->fallback);
|
|
tctx->fallback = NULL;
|
|
|
|
if (tctx->flags & BIT(FLAGS_HMAC)) {
|
|
struct omap_sham_hmac_ctx *bctx = tctx->base;
|
|
crypto_free_shash(bctx->shash);
|
|
}
|
|
}
|
|
|
|
static int omap_sham_export(struct ahash_request *req, void *out)
|
|
{
|
|
struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
|
|
|
|
memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_import(struct ahash_request *req, const void *in)
|
|
{
|
|
struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
|
|
const struct omap_sham_reqctx *ctx_in = in;
|
|
|
|
memcpy(rctx, in, sizeof(*rctx) + ctx_in->bufcnt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ahash_alg algs_sha1_md5[] = {
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = SHA1_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name = "omap-sha1",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = MD5_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "md5",
|
|
.cra_driver_name = "omap-md5",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = SHA1_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(sha1)",
|
|
.cra_driver_name = "omap-hmac-sha1",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_sha1_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = MD5_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(md5)",
|
|
.cra_driver_name = "omap-hmac-md5",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_md5_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
}
|
|
};
|
|
|
|
/* OMAP4 has some algs in addition to what OMAP2 has */
|
|
static struct ahash_alg algs_sha224_sha256[] = {
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = SHA224_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "sha224",
|
|
.cra_driver_name = "omap-sha224",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA224_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = SHA256_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "sha256",
|
|
.cra_driver_name = "omap-sha256",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = SHA224_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(sha224)",
|
|
.cra_driver_name = "omap-hmac-sha224",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA224_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_sha224_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = SHA256_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(sha256)",
|
|
.cra_driver_name = "omap-hmac-sha256",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_sha256_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
};
|
|
|
|
static struct ahash_alg algs_sha384_sha512[] = {
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = SHA384_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "sha384",
|
|
.cra_driver_name = "omap-sha384",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA384_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.halg.digestsize = SHA512_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "sha512",
|
|
.cra_driver_name = "omap-sha512",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA512_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = SHA384_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(sha384)",
|
|
.cra_driver_name = "omap-hmac-sha384",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA384_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_sha384_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
{
|
|
.init = omap_sham_init,
|
|
.update = omap_sham_update,
|
|
.final = omap_sham_final,
|
|
.finup = omap_sham_finup,
|
|
.digest = omap_sham_digest,
|
|
.setkey = omap_sham_setkey,
|
|
.halg.digestsize = SHA512_DIGEST_SIZE,
|
|
.halg.base = {
|
|
.cra_name = "hmac(sha512)",
|
|
.cra_driver_name = "omap-hmac-sha512",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
|
CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA512_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct omap_sham_ctx) +
|
|
sizeof(struct omap_sham_hmac_ctx),
|
|
.cra_alignmask = OMAP_ALIGN_MASK,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = omap_sham_cra_sha512_init,
|
|
.cra_exit = omap_sham_cra_exit,
|
|
}
|
|
},
|
|
};
|
|
|
|
static void omap_sham_done_task(unsigned long data)
|
|
{
|
|
struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
|
|
int err = 0;
|
|
|
|
dev_dbg(dd->dev, "%s: flags=%lx\n", __func__, dd->flags);
|
|
|
|
if (test_bit(FLAGS_CPU, &dd->flags)) {
|
|
if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags))
|
|
goto finish;
|
|
} else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
|
|
if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
|
|
omap_sham_update_dma_stop(dd);
|
|
if (dd->err) {
|
|
err = dd->err;
|
|
goto finish;
|
|
}
|
|
}
|
|
if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
|
|
/* hash or semi-hash ready */
|
|
clear_bit(FLAGS_DMA_READY, &dd->flags);
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
finish:
|
|
dev_dbg(dd->dev, "update done: err: %d\n", err);
|
|
/* finish curent request */
|
|
omap_sham_finish_req(dd->req, err);
|
|
}
|
|
|
|
static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
|
|
{
|
|
set_bit(FLAGS_OUTPUT_READY, &dd->flags);
|
|
tasklet_schedule(&dd->done_task);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
|
|
{
|
|
struct omap_sham_dev *dd = dev_id;
|
|
|
|
if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
|
|
/* final -> allow device to go to power-saving mode */
|
|
omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
|
|
|
|
omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
|
|
SHA_REG_CTRL_OUTPUT_READY);
|
|
omap_sham_read(dd, SHA_REG_CTRL);
|
|
|
|
return omap_sham_irq_common(dd);
|
|
}
|
|
|
|
static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
|
|
{
|
|
struct omap_sham_dev *dd = dev_id;
|
|
|
|
omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
|
|
|
|
return omap_sham_irq_common(dd);
|
|
}
|
|
|
|
static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
|
|
{
|
|
.algs_list = algs_sha1_md5,
|
|
.size = ARRAY_SIZE(algs_sha1_md5),
|
|
},
|
|
};
|
|
|
|
static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
|
|
.algs_info = omap_sham_algs_info_omap2,
|
|
.algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
|
|
.flags = BIT(FLAGS_BE32_SHA1),
|
|
.digest_size = SHA1_DIGEST_SIZE,
|
|
.copy_hash = omap_sham_copy_hash_omap2,
|
|
.write_ctrl = omap_sham_write_ctrl_omap2,
|
|
.trigger = omap_sham_trigger_omap2,
|
|
.poll_irq = omap_sham_poll_irq_omap2,
|
|
.intr_hdlr = omap_sham_irq_omap2,
|
|
.idigest_ofs = 0x00,
|
|
.din_ofs = 0x1c,
|
|
.digcnt_ofs = 0x14,
|
|
.rev_ofs = 0x5c,
|
|
.mask_ofs = 0x60,
|
|
.sysstatus_ofs = 0x64,
|
|
.major_mask = 0xf0,
|
|
.major_shift = 4,
|
|
.minor_mask = 0x0f,
|
|
.minor_shift = 0,
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
|
|
{
|
|
.algs_list = algs_sha1_md5,
|
|
.size = ARRAY_SIZE(algs_sha1_md5),
|
|
},
|
|
{
|
|
.algs_list = algs_sha224_sha256,
|
|
.size = ARRAY_SIZE(algs_sha224_sha256),
|
|
},
|
|
};
|
|
|
|
static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
|
|
.algs_info = omap_sham_algs_info_omap4,
|
|
.algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
|
|
.flags = BIT(FLAGS_AUTO_XOR),
|
|
.digest_size = SHA256_DIGEST_SIZE,
|
|
.copy_hash = omap_sham_copy_hash_omap4,
|
|
.write_ctrl = omap_sham_write_ctrl_omap4,
|
|
.trigger = omap_sham_trigger_omap4,
|
|
.poll_irq = omap_sham_poll_irq_omap4,
|
|
.intr_hdlr = omap_sham_irq_omap4,
|
|
.idigest_ofs = 0x020,
|
|
.odigest_ofs = 0x0,
|
|
.din_ofs = 0x080,
|
|
.digcnt_ofs = 0x040,
|
|
.rev_ofs = 0x100,
|
|
.mask_ofs = 0x110,
|
|
.sysstatus_ofs = 0x114,
|
|
.mode_ofs = 0x44,
|
|
.length_ofs = 0x48,
|
|
.major_mask = 0x0700,
|
|
.major_shift = 8,
|
|
.minor_mask = 0x003f,
|
|
.minor_shift = 0,
|
|
};
|
|
|
|
static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
|
|
{
|
|
.algs_list = algs_sha1_md5,
|
|
.size = ARRAY_SIZE(algs_sha1_md5),
|
|
},
|
|
{
|
|
.algs_list = algs_sha224_sha256,
|
|
.size = ARRAY_SIZE(algs_sha224_sha256),
|
|
},
|
|
{
|
|
.algs_list = algs_sha384_sha512,
|
|
.size = ARRAY_SIZE(algs_sha384_sha512),
|
|
},
|
|
};
|
|
|
|
static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
|
|
.algs_info = omap_sham_algs_info_omap5,
|
|
.algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
|
|
.flags = BIT(FLAGS_AUTO_XOR),
|
|
.digest_size = SHA512_DIGEST_SIZE,
|
|
.copy_hash = omap_sham_copy_hash_omap4,
|
|
.write_ctrl = omap_sham_write_ctrl_omap4,
|
|
.trigger = omap_sham_trigger_omap4,
|
|
.poll_irq = omap_sham_poll_irq_omap4,
|
|
.intr_hdlr = omap_sham_irq_omap4,
|
|
.idigest_ofs = 0x240,
|
|
.odigest_ofs = 0x200,
|
|
.din_ofs = 0x080,
|
|
.digcnt_ofs = 0x280,
|
|
.rev_ofs = 0x100,
|
|
.mask_ofs = 0x110,
|
|
.sysstatus_ofs = 0x114,
|
|
.mode_ofs = 0x284,
|
|
.length_ofs = 0x288,
|
|
.major_mask = 0x0700,
|
|
.major_shift = 8,
|
|
.minor_mask = 0x003f,
|
|
.minor_shift = 0,
|
|
};
|
|
|
|
static const struct of_device_id omap_sham_of_match[] = {
|
|
{
|
|
.compatible = "ti,omap2-sham",
|
|
.data = &omap_sham_pdata_omap2,
|
|
},
|
|
{
|
|
.compatible = "ti,omap3-sham",
|
|
.data = &omap_sham_pdata_omap2,
|
|
},
|
|
{
|
|
.compatible = "ti,omap4-sham",
|
|
.data = &omap_sham_pdata_omap4,
|
|
},
|
|
{
|
|
.compatible = "ti,omap5-sham",
|
|
.data = &omap_sham_pdata_omap5,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, omap_sham_of_match);
|
|
|
|
static int omap_sham_get_res_of(struct omap_sham_dev *dd,
|
|
struct device *dev, struct resource *res)
|
|
{
|
|
struct device_node *node = dev->of_node;
|
|
int err = 0;
|
|
|
|
dd->pdata = of_device_get_match_data(dev);
|
|
if (!dd->pdata) {
|
|
dev_err(dev, "no compatible OF match\n");
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
err = of_address_to_resource(node, 0, res);
|
|
if (err < 0) {
|
|
dev_err(dev, "can't translate OF node address\n");
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
dd->irq = irq_of_parse_and_map(node, 0);
|
|
if (!dd->irq) {
|
|
dev_err(dev, "can't translate OF irq value\n");
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
err:
|
|
return err;
|
|
}
|
|
#else
|
|
static const struct of_device_id omap_sham_of_match[] = {
|
|
{},
|
|
};
|
|
|
|
static int omap_sham_get_res_of(struct omap_sham_dev *dd,
|
|
struct device *dev, struct resource *res)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
|
|
struct platform_device *pdev, struct resource *res)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *r;
|
|
int err = 0;
|
|
|
|
/* Get the base address */
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!r) {
|
|
dev_err(dev, "no MEM resource info\n");
|
|
err = -ENODEV;
|
|
goto err;
|
|
}
|
|
memcpy(res, r, sizeof(*res));
|
|
|
|
/* Get the IRQ */
|
|
dd->irq = platform_get_irq(pdev, 0);
|
|
if (dd->irq < 0) {
|
|
err = dd->irq;
|
|
goto err;
|
|
}
|
|
|
|
/* Only OMAP2/3 can be non-DT */
|
|
dd->pdata = &omap_sham_pdata_omap2;
|
|
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static ssize_t fallback_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct omap_sham_dev *dd = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", dd->fallback_sz);
|
|
}
|
|
|
|
static ssize_t fallback_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct omap_sham_dev *dd = dev_get_drvdata(dev);
|
|
ssize_t status;
|
|
long value;
|
|
|
|
status = kstrtol(buf, 0, &value);
|
|
if (status)
|
|
return status;
|
|
|
|
/* HW accelerator only works with buffers > 9 */
|
|
if (value < 9) {
|
|
dev_err(dev, "minimum fallback size 9\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dd->fallback_sz = value;
|
|
|
|
return size;
|
|
}
|
|
|
|
static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct omap_sham_dev *dd = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%d\n", dd->queue.max_qlen);
|
|
}
|
|
|
|
static ssize_t queue_len_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t size)
|
|
{
|
|
struct omap_sham_dev *dd = dev_get_drvdata(dev);
|
|
ssize_t status;
|
|
long value;
|
|
|
|
status = kstrtol(buf, 0, &value);
|
|
if (status)
|
|
return status;
|
|
|
|
if (value < 1)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Changing the queue size in fly is safe, if size becomes smaller
|
|
* than current size, it will just not accept new entries until
|
|
* it has shrank enough.
|
|
*/
|
|
dd->queue.max_qlen = value;
|
|
|
|
return size;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(queue_len);
|
|
static DEVICE_ATTR_RW(fallback);
|
|
|
|
static struct attribute *omap_sham_attrs[] = {
|
|
&dev_attr_queue_len.attr,
|
|
&dev_attr_fallback.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group omap_sham_attr_group = {
|
|
.attrs = omap_sham_attrs,
|
|
};
|
|
|
|
static int omap_sham_probe(struct platform_device *pdev)
|
|
{
|
|
struct omap_sham_dev *dd;
|
|
struct device *dev = &pdev->dev;
|
|
struct resource res;
|
|
dma_cap_mask_t mask;
|
|
int err, i, j;
|
|
u32 rev;
|
|
|
|
dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
|
|
if (dd == NULL) {
|
|
dev_err(dev, "unable to alloc data struct.\n");
|
|
err = -ENOMEM;
|
|
goto data_err;
|
|
}
|
|
dd->dev = dev;
|
|
platform_set_drvdata(pdev, dd);
|
|
|
|
INIT_LIST_HEAD(&dd->list);
|
|
tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
|
|
crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
|
|
|
|
err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
|
|
omap_sham_get_res_pdev(dd, pdev, &res);
|
|
if (err)
|
|
goto data_err;
|
|
|
|
dd->io_base = devm_ioremap_resource(dev, &res);
|
|
if (IS_ERR(dd->io_base)) {
|
|
err = PTR_ERR(dd->io_base);
|
|
goto data_err;
|
|
}
|
|
dd->phys_base = res.start;
|
|
|
|
err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
|
|
IRQF_TRIGGER_NONE, dev_name(dev), dd);
|
|
if (err) {
|
|
dev_err(dev, "unable to request irq %d, err = %d\n",
|
|
dd->irq, err);
|
|
goto data_err;
|
|
}
|
|
|
|
dma_cap_zero(mask);
|
|
dma_cap_set(DMA_SLAVE, mask);
|
|
|
|
dd->dma_lch = dma_request_chan(dev, "rx");
|
|
if (IS_ERR(dd->dma_lch)) {
|
|
err = PTR_ERR(dd->dma_lch);
|
|
if (err == -EPROBE_DEFER)
|
|
goto data_err;
|
|
|
|
dd->polling_mode = 1;
|
|
dev_dbg(dev, "using polling mode instead of dma\n");
|
|
}
|
|
|
|
dd->flags |= dd->pdata->flags;
|
|
sham.flags |= dd->pdata->flags;
|
|
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY);
|
|
|
|
dd->fallback_sz = OMAP_SHA_DMA_THRESHOLD;
|
|
|
|
pm_runtime_enable(dev);
|
|
pm_runtime_irq_safe(dev);
|
|
|
|
err = pm_runtime_get_sync(dev);
|
|
if (err < 0) {
|
|
dev_err(dev, "failed to get sync: %d\n", err);
|
|
goto err_pm;
|
|
}
|
|
|
|
rev = omap_sham_read(dd, SHA_REG_REV(dd));
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
|
|
dev_info(dev, "hw accel on OMAP rev %u.%u\n",
|
|
(rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
|
|
(rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
|
|
|
|
spin_lock(&sham.lock);
|
|
list_add_tail(&dd->list, &sham.dev_list);
|
|
spin_unlock(&sham.lock);
|
|
|
|
dd->engine = crypto_engine_alloc_init(dev, 1);
|
|
if (!dd->engine) {
|
|
err = -ENOMEM;
|
|
goto err_engine;
|
|
}
|
|
|
|
err = crypto_engine_start(dd->engine);
|
|
if (err)
|
|
goto err_engine_start;
|
|
|
|
for (i = 0; i < dd->pdata->algs_info_size; i++) {
|
|
if (dd->pdata->algs_info[i].registered)
|
|
break;
|
|
|
|
for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
|
|
struct ahash_alg *alg;
|
|
|
|
alg = &dd->pdata->algs_info[i].algs_list[j];
|
|
alg->export = omap_sham_export;
|
|
alg->import = omap_sham_import;
|
|
alg->halg.statesize = sizeof(struct omap_sham_reqctx) +
|
|
BUFLEN;
|
|
err = crypto_register_ahash(alg);
|
|
if (err)
|
|
goto err_algs;
|
|
|
|
dd->pdata->algs_info[i].registered++;
|
|
}
|
|
}
|
|
|
|
err = sysfs_create_group(&dev->kobj, &omap_sham_attr_group);
|
|
if (err) {
|
|
dev_err(dev, "could not create sysfs device attrs\n");
|
|
goto err_algs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_algs:
|
|
for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
|
|
for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
|
|
crypto_unregister_ahash(
|
|
&dd->pdata->algs_info[i].algs_list[j]);
|
|
err_engine_start:
|
|
crypto_engine_exit(dd->engine);
|
|
err_engine:
|
|
spin_lock(&sham.lock);
|
|
list_del(&dd->list);
|
|
spin_unlock(&sham.lock);
|
|
err_pm:
|
|
pm_runtime_disable(dev);
|
|
if (!dd->polling_mode)
|
|
dma_release_channel(dd->dma_lch);
|
|
data_err:
|
|
dev_err(dev, "initialization failed.\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int omap_sham_remove(struct platform_device *pdev)
|
|
{
|
|
struct omap_sham_dev *dd;
|
|
int i, j;
|
|
|
|
dd = platform_get_drvdata(pdev);
|
|
if (!dd)
|
|
return -ENODEV;
|
|
spin_lock(&sham.lock);
|
|
list_del(&dd->list);
|
|
spin_unlock(&sham.lock);
|
|
for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
|
|
for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) {
|
|
crypto_unregister_ahash(
|
|
&dd->pdata->algs_info[i].algs_list[j]);
|
|
dd->pdata->algs_info[i].registered--;
|
|
}
|
|
tasklet_kill(&dd->done_task);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
if (!dd->polling_mode)
|
|
dma_release_channel(dd->dma_lch);
|
|
|
|
sysfs_remove_group(&dd->dev->kobj, &omap_sham_attr_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int omap_sham_suspend(struct device *dev)
|
|
{
|
|
pm_runtime_put_sync(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int omap_sham_resume(struct device *dev)
|
|
{
|
|
int err = pm_runtime_get_sync(dev);
|
|
if (err < 0) {
|
|
dev_err(dev, "failed to get sync: %d\n", err);
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(omap_sham_pm_ops, omap_sham_suspend, omap_sham_resume);
|
|
|
|
static struct platform_driver omap_sham_driver = {
|
|
.probe = omap_sham_probe,
|
|
.remove = omap_sham_remove,
|
|
.driver = {
|
|
.name = "omap-sham",
|
|
.pm = &omap_sham_pm_ops,
|
|
.of_match_table = omap_sham_of_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(omap_sham_driver);
|
|
|
|
MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Dmitry Kasatkin");
|
|
MODULE_ALIAS("platform:omap-sham");
|