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crypto: acomp - Add ACOMP_FBREQ_ON_STACK

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Add a helper to create an on-stack fallback request from a given
request.  Use this helper in acomp_do_nondma.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-04-07 18:02:55 +08:00
parent b04b395f7a
commit 05fa2c6e87
2 changed files with 27 additions and 13 deletions
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14
crypto/acompress.c
View file

@ -253,21 +253,9 @@ static void acomp_virt_to_sg(struct acomp_req *req)
static int acomp_do_nondma(struct acomp_req *req, bool comp)
{
u32 keep = CRYPTO_ACOMP_REQ_SRC_VIRT |
CRYPTO_ACOMP_REQ_SRC_NONDMA |
CRYPTO_ACOMP_REQ_DST_VIRT |
CRYPTO_ACOMP_REQ_DST_NONDMA;
ACOMP_REQUEST_ON_STACK(fbreq, crypto_acomp_reqtfm(req));
ACOMP_FBREQ_ON_STACK(fbreq, req);
int err;
acomp_request_set_callback(fbreq, req->base.flags, NULL, NULL);
fbreq->base.flags &= ~keep;
fbreq->base.flags |= req->base.flags & keep;
fbreq->src = req->src;
fbreq->dst = req->dst;
fbreq->slen = req->slen;
fbreq->dlen = req->dlen;
if (comp)
err = crypto_acomp_compress(fbreq);
else

26
include/crypto/internal/acompress.h
View file

@ -23,6 +23,12 @@
struct acomp_req *name = acomp_request_on_stack_init( \
__##name##_req, (tfm), 0, true)
#define ACOMP_FBREQ_ON_STACK(name, req) \
char __##name##_req[sizeof(struct acomp_req) + \
MAX_SYNC_COMP_REQSIZE] CRYPTO_MINALIGN_ATTR; \
struct acomp_req *name = acomp_fbreq_on_stack_init( \
__##name##_req, (req))
/**
* struct acomp_alg - asynchronous compression algorithm
*
@ -235,4 +241,24 @@ static inline u32 acomp_request_flags(struct acomp_req *req)
return crypto_request_flags(&req->base) & ~CRYPTO_ACOMP_REQ_PRIVATE;
}
static inline struct acomp_req *acomp_fbreq_on_stack_init(
char *buf, struct acomp_req *old)
{
struct crypto_acomp *tfm = crypto_acomp_reqtfm(old);
struct acomp_req *req;
req = acomp_request_on_stack_init(buf, tfm, 0, true);
acomp_request_set_callback(req, acomp_request_flags(old), NULL, NULL);
req->base.flags &= ~CRYPTO_ACOMP_REQ_PRIVATE;
req->base.flags |= old->base.flags & CRYPTO_ACOMP_REQ_PRIVATE;
req->src = old->src;
req->dst = old->dst;
req->slen = old->slen;
req->dlen = old->dlen;
req->soff = old->soff;
req->doff = old->doff;
return req;
}
#endif