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Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Browse source 
Pull crypto fix from Herbert Xu:
 "This fixes a hash corruption bug in the marvell driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: marvell - Copy IVDIG before launching partial DMA ahash requests
This commit is contained in:
Linus Torvalds 2016-12-27 17:51:36 -08:00
commit 2d706e790f
3 changed files with 43 additions and 3 deletions
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3
drivers/crypto/marvell/cesa.h
View file

@ -273,7 +273,8 @@ struct mv_cesa_op_ctx {
#define CESA_TDMA_SRC_IN_SRAM BIT(30)
#define CESA_TDMA_END_OF_REQ BIT(29)
#define CESA_TDMA_BREAK_CHAIN BIT(28)
#define CESA_TDMA_TYPE_MSK GENMASK(27, 0)
#define CESA_TDMA_SET_STATE BIT(27)
#define CESA_TDMA_TYPE_MSK GENMASK(26, 0)
#define CESA_TDMA_DUMMY 0
#define CESA_TDMA_DATA 1
#define CESA_TDMA_OP 2

34
drivers/crypto/marvell/hash.c
View file

@ -280,13 +280,32 @@ static void mv_cesa_ahash_std_prepare(struct ahash_request *req)
sreq->offset = 0;
}
static void mv_cesa_ahash_dma_step(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_req *base = &creq->base;
/* We must explicitly set the digest state. */
if (base->chain.first->flags & CESA_TDMA_SET_STATE) {
struct mv_cesa_engine *engine = base->engine;
int i;
/* Set the hash state in the IVDIG regs. */
for (i = 0; i < ARRAY_SIZE(creq->state); i++)
writel_relaxed(creq->state[i], engine->regs +
CESA_IVDIG(i));
}
mv_cesa_dma_step(base);
}
static void mv_cesa_ahash_step(struct crypto_async_request *req)
{
struct ahash_request *ahashreq = ahash_request_cast(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq);
if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
mv_cesa_dma_step(&creq->base);
mv_cesa_ahash_dma_step(ahashreq);
else
mv_cesa_ahash_std_step(ahashreq);
}
@ -584,12 +603,16 @@ static int mv_cesa_ahash_dma_req_init(struct ahash_request *req)
struct mv_cesa_ahash_dma_iter iter;
struct mv_cesa_op_ctx *op = NULL;
unsigned int frag_len;
bool set_state = false;
int ret;
u32 type;
basereq->chain.first = NULL;
basereq->chain.last = NULL;
if (!mv_cesa_mac_op_is_first_frag(&creq->op_tmpl))
set_state = true;
if (creq->src_nents) {
ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
DMA_TO_DEVICE);
@ -683,6 +706,15 @@ static int mv_cesa_ahash_dma_req_init(struct ahash_request *req)
if (type != CESA_TDMA_RESULT)
basereq->chain.last->flags |= CESA_TDMA_BREAK_CHAIN;
if (set_state) {
/*
* Put the CESA_TDMA_SET_STATE flag on the first tdma desc to
* let the step logic know that the IVDIG registers should be
* explicitly set before launching a TDMA chain.
*/
basereq->chain.first->flags |= CESA_TDMA_SET_STATE;
}
return 0;
err_free_tdma:

9
drivers/crypto/marvell/tdma.c
View file

@ -109,7 +109,14 @@ void mv_cesa_tdma_chain(struct mv_cesa_engine *engine,
last->next = dreq->chain.first;
engine->chain.last = dreq->chain.last;
if (!(last->flags & CESA_TDMA_BREAK_CHAIN))
/*
* Break the DMA chain if the CESA_TDMA_BREAK_CHAIN is set on
* the last element of the current chain, or if the request
* being queued needs the IV regs to be set before lauching
* the request.
*/
if (!(last->flags & CESA_TDMA_BREAK_CHAIN) &&
!(dreq->chain.first->flags & CESA_TDMA_SET_STATE))
last->next_dma = dreq->chain.first->cur_dma;
}
}