crypto: acomp - Move scomp stream allocation code into acomp

Move the dynamic stream allocation code into acomp and make it
available as a helper for acomp algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-03-19 14:04:52 +08:00
parent d348ebc658
commit 42d9f6c774
4 changed files with 166 additions and 140 deletions

View file

@ -9,13 +9,18 @@
#include <crypto/internal/acompress.h>
#include <linux/cryptouser.h>
#include <linux/cpumask.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/page-flags.h>
#include <linux/percpu.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/workqueue.h>
#include <net/netlink.h>
#include "compress.h"
@ -434,5 +439,112 @@ void crypto_unregister_acomps(struct acomp_alg *algs, int count)
}
EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
static void acomp_stream_workfn(struct work_struct *work)
{
struct crypto_acomp_streams *s =
container_of(work, struct crypto_acomp_streams, stream_work);
struct crypto_acomp_stream __percpu *streams = s->streams;
int cpu;
for_each_cpu(cpu, &s->stream_want) {
struct crypto_acomp_stream *ps;
void *ctx;
ps = per_cpu_ptr(streams, cpu);
if (ps->ctx)
continue;
ctx = s->alloc_ctx();
if (IS_ERR(ctx))
break;
spin_lock_bh(&ps->lock);
ps->ctx = ctx;
spin_unlock_bh(&ps->lock);
cpumask_clear_cpu(cpu, &s->stream_want);
}
}
void crypto_acomp_free_streams(struct crypto_acomp_streams *s)
{
struct crypto_acomp_stream __percpu *streams = s->streams;
void (*free_ctx)(void *);
int i;
cancel_work_sync(&s->stream_work);
free_ctx = s->free_ctx;
for_each_possible_cpu(i) {
struct crypto_acomp_stream *ps = per_cpu_ptr(streams, i);
if (!ps->ctx)
continue;
free_ctx(ps->ctx);
}
free_percpu(streams);
}
EXPORT_SYMBOL_GPL(crypto_acomp_free_streams);
int crypto_acomp_alloc_streams(struct crypto_acomp_streams *s)
{
struct crypto_acomp_stream __percpu *streams;
struct crypto_acomp_stream *ps;
unsigned int i;
void *ctx;
if (s->streams)
return 0;
streams = alloc_percpu(struct crypto_acomp_stream);
if (!streams)
return -ENOMEM;
ctx = s->alloc_ctx();
if (IS_ERR(ctx)) {
free_percpu(streams);
return PTR_ERR(ctx);
}
i = cpumask_first(cpu_possible_mask);
ps = per_cpu_ptr(streams, i);
ps->ctx = ctx;
for_each_possible_cpu(i) {
ps = per_cpu_ptr(streams, i);
spin_lock_init(&ps->lock);
}
s->streams = streams;
INIT_WORK(&s->stream_work, acomp_stream_workfn);
return 0;
}
EXPORT_SYMBOL_GPL(crypto_acomp_alloc_streams);
struct crypto_acomp_stream *crypto_acomp_lock_stream_bh(
struct crypto_acomp_streams *s) __acquires(stream)
{
struct crypto_acomp_stream __percpu *streams = s->streams;
int cpu = raw_smp_processor_id();
struct crypto_acomp_stream *ps;
ps = per_cpu_ptr(streams, cpu);
spin_lock_bh(&ps->lock);
if (likely(ps->ctx))
return ps;
spin_unlock(&ps->lock);
cpumask_set_cpu(cpu, &s->stream_want);
schedule_work(&s->stream_work);
ps = per_cpu_ptr(streams, cpumask_first(cpu_possible_mask));
spin_lock(&ps->lock);
return ps;
}
EXPORT_SYMBOL_GPL(crypto_acomp_lock_stream_bh);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous compression type");

View file

@ -7,7 +7,6 @@
* Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
*/
#include <crypto/internal/acompress.h>
#include <crypto/internal/scompress.h>
#include <crypto/scatterwalk.h>
#include <linux/cpumask.h>
@ -132,91 +131,15 @@ static int crypto_scomp_alloc_scratches(void)
return scomp_alloc_scratch(scratch, i);
}
static void scomp_free_streams(struct scomp_alg *alg)
{
struct crypto_acomp_stream __percpu *stream = alg->stream;
int i;
for_each_possible_cpu(i) {
struct crypto_acomp_stream *ps = per_cpu_ptr(stream, i);
if (!ps->ctx)
continue;
alg->free_ctx(ps->ctx);
}
free_percpu(stream);
}
static int scomp_alloc_streams(struct scomp_alg *alg)
{
struct crypto_acomp_stream __percpu *stream;
struct crypto_acomp_stream *ps;
unsigned int i;
void *ctx;
stream = alloc_percpu(struct crypto_acomp_stream);
if (!stream)
return -ENOMEM;
ctx = alg->alloc_ctx();
if (IS_ERR(ctx)) {
free_percpu(stream);
return PTR_ERR(ctx);
}
i = cpumask_first(cpu_possible_mask);
ps = per_cpu_ptr(stream, i);
ps->ctx = ctx;
for_each_possible_cpu(i) {
ps = per_cpu_ptr(stream, i);
spin_lock_init(&ps->lock);
}
alg->stream = stream;
return 0;
}
static void scomp_stream_workfn(struct work_struct *work)
{
struct scomp_alg *alg = container_of(work, struct scomp_alg,
stream_work);
struct crypto_acomp_stream __percpu *stream = alg->stream;
int cpu;
for_each_cpu(cpu, &alg->stream_want) {
struct crypto_acomp_stream *ps;
void *ctx;
ps = per_cpu_ptr(stream, cpu);
if (ps->ctx)
continue;
ctx = alg->alloc_ctx();
if (IS_ERR(ctx))
break;
spin_lock_bh(&ps->lock);
ps->ctx = ctx;
spin_unlock_bh(&ps->lock);
cpumask_clear_cpu(cpu, &alg->stream_want);
}
}
static int crypto_scomp_init_tfm(struct crypto_tfm *tfm)
{
struct scomp_alg *alg = crypto_scomp_alg(__crypto_scomp_tfm(tfm));
int ret = 0;
mutex_lock(&scomp_lock);
if (!alg->stream) {
ret = scomp_alloc_streams(alg);
if (ret)
goto unlock;
}
ret = crypto_acomp_alloc_streams(&alg->streams);
if (ret)
goto unlock;
if (!scomp_scratch_users) {
ret = crypto_scomp_alloc_scratches();
if (ret)
@ -229,13 +152,13 @@ unlock:
return ret;
}
static struct scomp_scratch *scomp_lock_scratch_bh(void) __acquires(scratch)
static struct scomp_scratch *scomp_lock_scratch(void) __acquires(scratch)
{
int cpu = raw_smp_processor_id();
struct scomp_scratch *scratch;
scratch = per_cpu_ptr(&scomp_scratch, cpu);
spin_lock_bh(&scratch->lock);
spin_lock(&scratch->lock);
if (likely(scratch->src))
return scratch;
spin_unlock(&scratch->lock);
@ -248,39 +171,10 @@ static struct scomp_scratch *scomp_lock_scratch_bh(void) __acquires(scratch)
return scratch;
}
static inline void scomp_unlock_scratch_bh(struct scomp_scratch *scratch)
static inline void scomp_unlock_scratch(struct scomp_scratch *scratch)
__releases(scratch)
{
spin_unlock_bh(&scratch->lock);
}
static struct crypto_acomp_stream *scomp_lock_stream(struct crypto_scomp *tfm)
__acquires(stream)
{
struct scomp_alg *alg = crypto_scomp_alg(tfm);
struct crypto_acomp_stream __percpu *stream;
int cpu = raw_smp_processor_id();
struct crypto_acomp_stream *ps;
stream = alg->stream;
ps = per_cpu_ptr(stream, cpu);
spin_lock(&ps->lock);
if (likely(ps->ctx))
return ps;
spin_unlock(&ps->lock);
cpumask_set_cpu(cpu, &alg->stream_want);
schedule_work(&alg->stream_work);
ps = per_cpu_ptr(stream, cpumask_first(cpu_possible_mask));
spin_lock(&ps->lock);
return ps;
}
static inline void scomp_unlock_stream(struct crypto_acomp_stream *stream)
__releases(stream)
{
spin_unlock(&stream->lock);
spin_unlock(&scratch->lock);
}
static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
@ -306,7 +200,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
if (!req->dst || !dlen)
return -EINVAL;
scratch = scomp_lock_scratch_bh();
stream = crypto_acomp_lock_stream_bh(&crypto_scomp_alg(scomp)->streams);
scratch = scomp_lock_scratch();
if (acomp_request_src_isvirt(req))
src = req->svirt;
@ -367,7 +262,6 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
dlen = min(dlen, max);
}
stream = scomp_lock_stream(scomp);
if (dir)
ret = crypto_scomp_compress(scomp, src, slen,
dst, &dlen, stream->ctx);
@ -378,8 +272,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
if (dst == scratch->dst)
memcpy_to_sglist(req->dst, 0, dst, dlen);
scomp_unlock_stream(stream);
scomp_unlock_scratch_bh(scratch);
scomp_unlock_scratch(scratch);
crypto_acomp_unlock_stream_bh(stream);
req->dlen = dlen;
@ -466,8 +360,7 @@ static void crypto_scomp_destroy(struct crypto_alg *alg)
{
struct scomp_alg *scomp = __crypto_scomp_alg(alg);
cancel_work_sync(&scomp->stream_work);
scomp_free_streams(scomp);
crypto_acomp_free_streams(&scomp->streams);
}
static const struct crypto_type crypto_scomp_type = {
@ -493,8 +386,6 @@ static void scomp_prepare_alg(struct scomp_alg *alg)
comp_prepare_alg(&alg->calg);
base->cra_flags |= CRYPTO_ALG_REQ_CHAIN;
INIT_WORK(&alg->stream_work, scomp_stream_workfn);
}
int crypto_register_scomp(struct scomp_alg *alg)

View file

@ -11,6 +11,10 @@
#include <crypto/acompress.h>
#include <crypto/algapi.h>
#include <linux/compiler_types.h>
#include <linux/cpumask_types.h>
#include <linux/spinlock.h>
#include <linux/workqueue_types.h>
#define ACOMP_REQUEST_ON_STACK(name, tfm) \
char __##name##_req[sizeof(struct acomp_req) + \
@ -53,6 +57,24 @@ struct acomp_alg {
};
};
struct crypto_acomp_stream {
spinlock_t lock;
void *ctx;
};
struct crypto_acomp_streams {
/* These must come first because of struct scomp_alg. */
void *(*alloc_ctx)(void);
union {
void (*free_ctx)(void *);
void (*cfree_ctx)(const void *);
};
struct crypto_acomp_stream __percpu *streams;
struct work_struct stream_work;
cpumask_t stream_want;
};
/*
* Transform internal helpers.
*/
@ -157,4 +179,15 @@ static inline bool crypto_acomp_req_chain(struct crypto_acomp *tfm)
return crypto_tfm_req_chain(&tfm->base);
}
void crypto_acomp_free_streams(struct crypto_acomp_streams *s);
int crypto_acomp_alloc_streams(struct crypto_acomp_streams *s);
struct crypto_acomp_stream *crypto_acomp_lock_stream_bh(
struct crypto_acomp_streams *s) __acquires(stream);
static inline void crypto_acomp_unlock_stream_bh(
struct crypto_acomp_stream *stream) __releases(stream)
{
spin_unlock_bh(&stream->lock);
}
#endif

View file

@ -9,22 +9,12 @@
#ifndef _CRYPTO_SCOMP_INT_H
#define _CRYPTO_SCOMP_INT_H
#include <crypto/acompress.h>
#include <crypto/algapi.h>
#include <linux/cpumask_types.h>
#include <linux/workqueue_types.h>
struct acomp_req;
#include <crypto/internal/acompress.h>
struct crypto_scomp {
struct crypto_tfm base;
};
struct crypto_acomp_stream {
spinlock_t lock;
void *ctx;
};
/**
* struct scomp_alg - synchronous compression algorithm
*
@ -33,14 +23,10 @@ struct crypto_acomp_stream {
* @compress: Function performs a compress operation
* @decompress: Function performs a de-compress operation
* @base: Common crypto API algorithm data structure
* @stream: Per-cpu memory for algorithm
* @stream_work: Work struct to allocate stream memmory
* @stream_want: CPU mask for allocating stream memory
* @streams: Per-cpu memory for algorithm
* @calg: Cmonn algorithm data structure shared with acomp
*/
struct scomp_alg {
void *(*alloc_ctx)(void);
void (*free_ctx)(void *ctx);
int (*compress)(struct crypto_scomp *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx);
@ -48,9 +34,13 @@ struct scomp_alg {
unsigned int slen, u8 *dst, unsigned int *dlen,
void *ctx);
struct crypto_acomp_stream __percpu *stream;
struct work_struct stream_work;
cpumask_t stream_want;
union {
struct {
void *(*alloc_ctx)(void);
void (*free_ctx)(void *ctx);
};
struct crypto_acomp_streams streams;
};
union {
struct COMP_ALG_COMMON;