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-rw-r--r--sys/crypto/aesni/aesni.c128
-rw-r--r--sys/crypto/aesni/aesni.h1
2 files changed, 103 insertions, 26 deletions
diff --git a/sys/crypto/aesni/aesni.c b/sys/crypto/aesni/aesni.c
index 7f143cb..416c31f 100644
--- a/sys/crypto/aesni/aesni.c
+++ b/sys/crypto/aesni/aesni.c
@@ -45,17 +45,36 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/uio.h>
#include <sys/mbuf.h>
+#include <sys/mutex.h>
+#include <sys/smp.h>
#include <crypto/aesni/aesni.h>
#include <cryptodev_if.h>
#include <opencrypto/gmac.h>
+static struct mtx_padalign *ctx_mtx;
+static struct fpu_kern_ctx **ctx_fpu;
+
struct aesni_softc {
+ int dieing;
int32_t cid;
uint32_t sid;
TAILQ_HEAD(aesni_sessions_head, aesni_session) sessions;
struct rwlock lock;
};
+#define AQUIRE_CTX(i, ctx) \
+ do { \
+ (i) = PCPU_GET(cpuid); \
+ mtx_lock(&ctx_mtx[(i)]); \
+ (ctx) = ctx_fpu[(i)]; \
+ } while (0)
+#define RELEASE_CTX(i, ctx) \
+ do { \
+ mtx_unlock(&ctx_mtx[(i)]); \
+ (i) = -1; \
+ (ctx) = NULL; \
+ } while (0)
+
static int aesni_newsession(device_t, uint32_t *sidp, struct cryptoini *cri);
static int aesni_freesession(device_t, uint64_t tid);
static void aesni_freesession_locked(struct aesni_softc *sc,
@@ -95,14 +114,36 @@ aesni_probe(device_t dev)
return (0);
}
+static void
+aensi_cleanctx(void)
+{
+ int i;
+
+ /* XXX - no way to return driverid */
+ CPU_FOREACH(i) {
+ if (ctx_fpu[i] != NULL) {
+ mtx_destroy(&ctx_mtx[i]);
+ fpu_kern_free_ctx(ctx_fpu[i]);
+ }
+ ctx_fpu[i] = NULL;
+ }
+ free(ctx_mtx, M_AESNI);
+ ctx_mtx = NULL;
+ free(ctx_fpu, M_AESNI);
+ ctx_fpu = NULL;
+}
+
static int
aesni_attach(device_t dev)
{
struct aesni_softc *sc;
+ int i;
sc = device_get_softc(dev);
+ sc->dieing = 0;
TAILQ_INIT(&sc->sessions);
sc->sid = 1;
+
sc->cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE |
CRYPTOCAP_F_SYNC);
if (sc->cid < 0) {
@@ -110,6 +151,16 @@ aesni_attach(device_t dev)
return (ENOMEM);
}
+ ctx_mtx = malloc(sizeof *ctx_mtx * (mp_maxid + 1), M_AESNI,
+ M_WAITOK|M_ZERO);
+ ctx_fpu = malloc(sizeof *ctx_fpu * (mp_maxid + 1), M_AESNI,
+ M_WAITOK|M_ZERO);
+
+ CPU_FOREACH(i) {
+ ctx_fpu[i] = fpu_kern_alloc_ctx(0);
+ mtx_init(&ctx_mtx[i], "anifpumtx", NULL, MTX_DEF);
+ }
+
rw_init(&sc->lock, "aesni_lock");
crypto_register(sc->cid, CRYPTO_AES_CBC, 0, 0);
crypto_register(sc->cid, CRYPTO_AES_ICM, 0, 0);
@@ -128,6 +179,7 @@ aesni_detach(device_t dev)
struct aesni_session *ses;
sc = device_get_softc(dev);
+
rw_wlock(&sc->lock);
TAILQ_FOREACH(ses, &sc->sessions, next) {
if (ses->used) {
@@ -137,14 +189,21 @@ aesni_detach(device_t dev)
return (EBUSY);
}
}
+ sc->dieing = 1;
while ((ses = TAILQ_FIRST(&sc->sessions)) != NULL) {
TAILQ_REMOVE(&sc->sessions, ses, next);
- fpu_kern_free_ctx(ses->fpu_ctx);
free(ses, M_AESNI);
}
rw_wunlock(&sc->lock);
- rw_destroy(&sc->lock);
crypto_unregister_all(sc->cid);
+
+ /* XXX - wait for anyone in _newsession to leave */
+ pause("aniwait", 1);
+
+ rw_destroy(&sc->lock);
+
+ aensi_cleanctx();
+
return (0);
}
@@ -162,6 +221,9 @@ aesni_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
}
sc = device_get_softc(dev);
+ if (sc->dieing)
+ return (EINVAL);
+
ses = NULL;
encini = NULL;
for (; cri != NULL; cri = cri->cri_next) {
@@ -195,6 +257,10 @@ aesni_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
}
rw_wlock(&sc->lock);
+ if (sc->dieing) {
+ rw_wunlock(&sc->lock);
+ return (EINVAL);
+ }
/*
* Free sessions goes first, so if first session is used, we need to
* allocate one.
@@ -206,12 +272,6 @@ aesni_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
rw_wunlock(&sc->lock);
return (ENOMEM);
}
- ses->fpu_ctx = fpu_kern_alloc_ctx(FPU_KERN_NOWAIT);
- if (ses->fpu_ctx == NULL) {
- free(ses, M_AESNI);
- rw_wunlock(&sc->lock);
- return (ENOMEM);
- }
ses->id = sc->sid++;
} else {
TAILQ_REMOVE(&sc->sessions, ses, next);
@@ -237,15 +297,14 @@ aesni_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
static void
aesni_freesession_locked(struct aesni_softc *sc, struct aesni_session *ses)
{
- struct fpu_kern_ctx *ctx;
uint32_t sid;
+ rw_assert(&sc->lock, RA_WLOCKED);
+
sid = ses->id;
TAILQ_REMOVE(&sc->sessions, ses, next);
- ctx = ses->fpu_ctx;
*ses = (struct aesni_session){};
ses->id = sid;
- ses->fpu_ctx = ctx;
TAILQ_INSERT_HEAD(&sc->sessions, ses, next);
}
@@ -429,17 +488,27 @@ MODULE_DEPEND(aesni, crypto, 1, 1, 1);
static int
aesni_cipher_setup(struct aesni_session *ses, struct cryptoini *encini)
{
- struct thread *td;
+ struct fpu_kern_ctx *ctx;
int error;
+ int kt, ctxidx;
+
+ kt = is_fpu_kern_thread(0);
+ if (!kt) {
+ AQUIRE_CTX(ctxidx, ctx);
+ error = fpu_kern_enter(curthread, ctx,
+ FPU_KERN_NORMAL | FPU_KERN_KTHR);
+ if (error != 0)
+ goto out;
+ }
- td = curthread;
- error = fpu_kern_enter(td, ses->fpu_ctx, FPU_KERN_NORMAL |
- FPU_KERN_KTHR);
- if (error != 0)
- return (error);
error = aesni_cipher_setup_common(ses, encini->cri_key,
encini->cri_klen);
- fpu_kern_leave(td, ses->fpu_ctx);
+
+ if (!kt) {
+ fpu_kern_leave(curthread, ctx);
+out:
+ RELEASE_CTX(ctxidx, ctx);
+ }
return (error);
}
@@ -450,12 +519,13 @@ static int
aesni_cipher_process(struct aesni_session *ses, struct cryptodesc *enccrd,
struct cryptodesc *authcrd, struct cryptop *crp)
{
+ struct fpu_kern_ctx *ctx;
uint8_t iv[AES_BLOCK_LEN];
uint8_t tag[GMAC_DIGEST_LEN];
- struct thread *td;
uint8_t *buf, *authbuf;
int error, allocated, authallocated;
int ivlen, encflag;
+ int kt, ctxidx;
encflag = (enccrd->crd_flags & CRD_F_ENCRYPT) == CRD_F_ENCRYPT;
@@ -478,11 +548,14 @@ aesni_cipher_process(struct aesni_session *ses, struct cryptodesc *enccrd,
}
}
- td = curthread;
- error = fpu_kern_enter(td, ses->fpu_ctx, FPU_KERN_NORMAL |
- FPU_KERN_KTHR);
- if (error != 0)
- goto out1;
+ kt = is_fpu_kern_thread(0);
+ if (!kt) {
+ AQUIRE_CTX(ctxidx, ctx);
+ error = fpu_kern_enter(curthread, ctx,
+ FPU_KERN_NORMAL|FPU_KERN_KTHR);
+ if (error != 0)
+ goto out2;
+ }
if ((enccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0) {
error = aesni_cipher_setup_common(ses, enccrd->crd_key,
@@ -578,7 +651,12 @@ aesni_cipher_process(struct aesni_session *ses, struct cryptodesc *enccrd,
}
out:
- fpu_kern_leave(td, ses->fpu_ctx);
+ if (!kt) {
+ fpu_kern_leave(curthread, ctx);
+out2:
+ RELEASE_CTX(ctxidx, ctx);
+ }
+
out1:
if (allocated) {
bzero(buf, enccrd->crd_len);
diff --git a/sys/crypto/aesni/aesni.h b/sys/crypto/aesni/aesni.h
index 2210f7f..0594176 100644
--- a/sys/crypto/aesni/aesni.h
+++ b/sys/crypto/aesni/aesni.h
@@ -64,7 +64,6 @@ struct aesni_session {
int used;
uint32_t id;
TAILQ_ENTRY(aesni_session) next;
- struct fpu_kern_ctx *fpu_ctx;
};
/*
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