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freebsd-nq/sys/dev/safe/safe.c
John Baldwin 895c98cc29 Don't return errors from the cryptodev_process() method. 
The cryptodev_process() method should either return 0 if it has
completed a request, or ERESTART to defer the request until later.  If
a request encounters an error, the error should be reported via
crp_etype before completing the request via crypto_done().

Fix a few more drivers noticed by asomers@ similar to the fix in
r365389.  This is an old bug, but went unnoticed since crypto requests
did not start failing as a normal part of operation until digest
verification was introduced which can fail requests with EBADMSG.

PR:		247986
Reported by:	asomers
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D26361
2020-09-08 22:41:35 +00:00

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52 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Sam Leffler, Errno Consulting
* Copyright (c) 2003 Global Technology Associates, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* SafeNet SafeXcel-1141 hardware crypto accelerator
*/
#include "opt_safe.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/endian.h>
#include <sys/uio.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <opencrypto/cryptodev.h>
#include <opencrypto/xform_auth.h>
#include <sys/random.h>
#include <sys/kobj.h>
#include "cryptodev_if.h"
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#ifdef SAFE_RNDTEST
#include <dev/rndtest/rndtest.h>
#endif
#include <dev/safe/safereg.h>
#include <dev/safe/safevar.h>
#ifndef bswap32
#define bswap32 NTOHL
#endif
/*
* Prototypes and count for the pci_device structure
*/
static int safe_probe(device_t);
static int safe_attach(device_t);
static int safe_detach(device_t);
static int safe_suspend(device_t);
static int safe_resume(device_t);
static int safe_shutdown(device_t);
static int safe_probesession(device_t, const struct crypto_session_params *);
static int safe_newsession(device_t, crypto_session_t,
const struct crypto_session_params *);
static int safe_process(device_t, struct cryptop *, int);
static device_method_t safe_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, safe_probe),
DEVMETHOD(device_attach, safe_attach),
DEVMETHOD(device_detach, safe_detach),
DEVMETHOD(device_suspend, safe_suspend),
DEVMETHOD(device_resume, safe_resume),
DEVMETHOD(device_shutdown, safe_shutdown),
/* crypto device methods */
DEVMETHOD(cryptodev_probesession, safe_probesession),
DEVMETHOD(cryptodev_newsession, safe_newsession),
DEVMETHOD(cryptodev_process, safe_process),
DEVMETHOD_END
};
static driver_t safe_driver = {
"safe",
safe_methods,
sizeof (struct safe_softc)
};
static devclass_t safe_devclass;
DRIVER_MODULE(safe, pci, safe_driver, safe_devclass, 0, 0);
MODULE_DEPEND(safe, crypto, 1, 1, 1);
#ifdef SAFE_RNDTEST
MODULE_DEPEND(safe, rndtest, 1, 1, 1);
#endif
static void safe_intr(void *);
static void safe_callback(struct safe_softc *, struct safe_ringentry *);
static void safe_feed(struct safe_softc *, struct safe_ringentry *);
static void safe_mcopy(struct mbuf *, struct mbuf *, u_int);
#ifndef SAFE_NO_RNG
static void safe_rng_init(struct safe_softc *);
static void safe_rng(void *);
#endif /* SAFE_NO_RNG */
static int safe_dma_malloc(struct safe_softc *, bus_size_t,
struct safe_dma_alloc *, int);
#define safe_dma_sync(_dma, _flags) \
bus_dmamap_sync((_dma)->dma_tag, (_dma)->dma_map, (_flags))
static void safe_dma_free(struct safe_softc *, struct safe_dma_alloc *);
static int safe_dmamap_aligned(const struct safe_operand *);
static int safe_dmamap_uniform(const struct safe_operand *);
static void safe_reset_board(struct safe_softc *);
static void safe_init_board(struct safe_softc *);
static void safe_init_pciregs(device_t dev);
static void safe_cleanchip(struct safe_softc *);
static void safe_totalreset(struct safe_softc *);
static int safe_free_entry(struct safe_softc *, struct safe_ringentry *);
static SYSCTL_NODE(_hw, OID_AUTO, safe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"SafeNet driver parameters");
#ifdef SAFE_DEBUG
static void safe_dump_dmastatus(struct safe_softc *, const char *);
static void safe_dump_ringstate(struct safe_softc *, const char *);
static void safe_dump_intrstate(struct safe_softc *, const char *);
static void safe_dump_request(struct safe_softc *, const char *,
struct safe_ringentry *);
static struct safe_softc *safec; /* for use by hw.safe.dump */
static int safe_debug = 0;
SYSCTL_INT(_hw_safe, OID_AUTO, debug, CTLFLAG_RW, &safe_debug,
0, "control debugging msgs");
#define DPRINTF(_x) if (safe_debug) printf _x
#else
#define DPRINTF(_x)
#endif
#define READ_REG(sc,r) \
bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (r))
#define WRITE_REG(sc,reg,val) \
bus_space_write_4((sc)->sc_st, (sc)->sc_sh, reg, val)
struct safe_stats safestats;
SYSCTL_STRUCT(_hw_safe, OID_AUTO, stats, CTLFLAG_RD, &safestats,
safe_stats, "driver statistics");
#ifndef SAFE_NO_RNG
static int safe_rnginterval = 1; /* poll once a second */
SYSCTL_INT(_hw_safe, OID_AUTO, rnginterval, CTLFLAG_RW, &safe_rnginterval,
0, "RNG polling interval (secs)");
static int safe_rngbufsize = 16; /* 64 bytes each poll */
SYSCTL_INT(_hw_safe, OID_AUTO, rngbufsize, CTLFLAG_RW, &safe_rngbufsize,
0, "RNG polling buffer size (32-bit words)");
static int safe_rngmaxalarm = 8; /* max alarms before reset */
SYSCTL_INT(_hw_safe, OID_AUTO, rngmaxalarm, CTLFLAG_RW, &safe_rngmaxalarm,
0, "RNG max alarms before reset");
#endif /* SAFE_NO_RNG */
static int
safe_probe(device_t dev)
{
if (pci_get_vendor(dev) == PCI_VENDOR_SAFENET &&
pci_get_device(dev) == PCI_PRODUCT_SAFEXCEL)
return (BUS_PROBE_DEFAULT);
return (ENXIO);
}
static const char*
safe_partname(struct safe_softc *sc)
{
/* XXX sprintf numbers when not decoded */
switch (pci_get_vendor(sc->sc_dev)) {
case PCI_VENDOR_SAFENET:
switch (pci_get_device(sc->sc_dev)) {
case PCI_PRODUCT_SAFEXCEL: return "SafeNet SafeXcel-1141";
}
return "SafeNet unknown-part";
}
return "Unknown-vendor unknown-part";
}
#ifndef SAFE_NO_RNG
static void
default_harvest(struct rndtest_state *rsp, void *buf, u_int count)
{
/* MarkM: FIX!! Check that this does not swamp the harvester! */
random_harvest_queue(buf, count, RANDOM_PURE_SAFE);
}
#endif /* SAFE_NO_RNG */
static int
safe_attach(device_t dev)
{
struct safe_softc *sc = device_get_softc(dev);
u_int32_t raddr;
u_int32_t i;
int rid;
bzero(sc, sizeof (*sc));
sc->sc_dev = dev;
/* XXX handle power management */
pci_enable_busmaster(dev);
/*
* Setup memory-mapping of PCI registers.
*/
rid = BS_BAR;
sc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->sc_sr == NULL) {
device_printf(dev, "cannot map register space\n");
goto bad;
}
sc->sc_st = rman_get_bustag(sc->sc_sr);
sc->sc_sh = rman_get_bushandle(sc->sc_sr);
/*
* Arrange interrupt line.
*/
rid = 0;
sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE|RF_ACTIVE);
if (sc->sc_irq == NULL) {
device_printf(dev, "could not map interrupt\n");
goto bad1;
}
/*
* NB: Network code assumes we are blocked with splimp()
* so make sure the IRQ is mapped appropriately.
*/
if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_NET | INTR_MPSAFE,
NULL, safe_intr, sc, &sc->sc_ih)) {
device_printf(dev, "could not establish interrupt\n");
goto bad2;
}
sc->sc_cid = crypto_get_driverid(dev, sizeof(struct safe_session),
CRYPTOCAP_F_HARDWARE);
if (sc->sc_cid < 0) {
device_printf(dev, "could not get crypto driver id\n");
goto bad3;
}
sc->sc_chiprev = READ_REG(sc, SAFE_DEVINFO) &
(SAFE_DEVINFO_REV_MAJ | SAFE_DEVINFO_REV_MIN);
/*
* Setup DMA descriptor area.
*/
if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, /* alignment */
SAFE_DMA_BOUNDARY, /* boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
SAFE_MAX_DMA, /* maxsize */
SAFE_MAX_PART, /* nsegments */
SAFE_MAX_SSIZE, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, NULL, /* locking */
&sc->sc_srcdmat)) {
device_printf(dev, "cannot allocate DMA tag\n");
goto bad4;
}
if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, /* alignment */
SAFE_MAX_DSIZE, /* boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
SAFE_MAX_DMA, /* maxsize */
SAFE_MAX_PART, /* nsegments */
SAFE_MAX_DSIZE, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, NULL, /* locking */
&sc->sc_dstdmat)) {
device_printf(dev, "cannot allocate DMA tag\n");
goto bad4;
}
/*
* Allocate packet engine descriptors.
*/
if (safe_dma_malloc(sc,
SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry),
&sc->sc_ringalloc, 0)) {
device_printf(dev, "cannot allocate PE descriptor ring\n");
bus_dma_tag_destroy(sc->sc_srcdmat);
goto bad4;
}
/*
* Hookup the static portion of all our data structures.
*/
sc->sc_ring = (struct safe_ringentry *) sc->sc_ringalloc.dma_vaddr;
sc->sc_ringtop = sc->sc_ring + SAFE_MAX_NQUEUE;
sc->sc_front = sc->sc_ring;
sc->sc_back = sc->sc_ring;
raddr = sc->sc_ringalloc.dma_paddr;
bzero(sc->sc_ring, SAFE_MAX_NQUEUE * sizeof(struct safe_ringentry));
for (i = 0; i < SAFE_MAX_NQUEUE; i++) {
struct safe_ringentry *re = &sc->sc_ring[i];
re->re_desc.d_sa = raddr +
offsetof(struct safe_ringentry, re_sa);
re->re_sa.sa_staterec = raddr +
offsetof(struct safe_ringentry, re_sastate);
raddr += sizeof (struct safe_ringentry);
}
mtx_init(&sc->sc_ringmtx, device_get_nameunit(dev),
"packet engine ring", MTX_DEF);
/*
* Allocate scatter and gather particle descriptors.
*/
if (safe_dma_malloc(sc, SAFE_TOTAL_SPART * sizeof (struct safe_pdesc),
&sc->sc_spalloc, 0)) {
device_printf(dev, "cannot allocate source particle "
"descriptor ring\n");
mtx_destroy(&sc->sc_ringmtx);
safe_dma_free(sc, &sc->sc_ringalloc);
bus_dma_tag_destroy(sc->sc_srcdmat);
goto bad4;
}
sc->sc_spring = (struct safe_pdesc *) sc->sc_spalloc.dma_vaddr;
sc->sc_springtop = sc->sc_spring + SAFE_TOTAL_SPART;
sc->sc_spfree = sc->sc_spring;
bzero(sc->sc_spring, SAFE_TOTAL_SPART * sizeof(struct safe_pdesc));
if (safe_dma_malloc(sc, SAFE_TOTAL_DPART * sizeof (struct safe_pdesc),
&sc->sc_dpalloc, 0)) {
device_printf(dev, "cannot allocate destination particle "
"descriptor ring\n");
mtx_destroy(&sc->sc_ringmtx);
safe_dma_free(sc, &sc->sc_spalloc);
safe_dma_free(sc, &sc->sc_ringalloc);
bus_dma_tag_destroy(sc->sc_dstdmat);
goto bad4;
}
sc->sc_dpring = (struct safe_pdesc *) sc->sc_dpalloc.dma_vaddr;
sc->sc_dpringtop = sc->sc_dpring + SAFE_TOTAL_DPART;
sc->sc_dpfree = sc->sc_dpring;
bzero(sc->sc_dpring, SAFE_TOTAL_DPART * sizeof(struct safe_pdesc));
device_printf(sc->sc_dev, "%s", safe_partname(sc));
sc->sc_devinfo = READ_REG(sc, SAFE_DEVINFO);
if (sc->sc_devinfo & SAFE_DEVINFO_RNG) {
sc->sc_flags |= SAFE_FLAGS_RNG;
printf(" rng");
}
if (sc->sc_devinfo & SAFE_DEVINFO_PKEY) {
#if 0
printf(" key");
sc->sc_flags |= SAFE_FLAGS_KEY;
crypto_kregister(sc->sc_cid, CRK_MOD_EXP, 0);
crypto_kregister(sc->sc_cid, CRK_MOD_EXP_CRT, 0);
#endif
}
if (sc->sc_devinfo & SAFE_DEVINFO_DES) {
printf(" des/3des");
}
if (sc->sc_devinfo & SAFE_DEVINFO_AES) {
printf(" aes");
}
if (sc->sc_devinfo & SAFE_DEVINFO_MD5) {
printf(" md5");
}
if (sc->sc_devinfo & SAFE_DEVINFO_SHA1) {
printf(" sha1");
}
/* XXX other supported algorithms */
printf("\n");
safe_reset_board(sc); /* reset h/w */
safe_init_pciregs(dev); /* init pci settings */
safe_init_board(sc); /* init h/w */
#ifndef SAFE_NO_RNG
if (sc->sc_flags & SAFE_FLAGS_RNG) {
#ifdef SAFE_RNDTEST
sc->sc_rndtest = rndtest_attach(dev);
if (sc->sc_rndtest)
sc->sc_harvest = rndtest_harvest;
else
sc->sc_harvest = default_harvest;
#else
sc->sc_harvest = default_harvest;
#endif
safe_rng_init(sc);
callout_init(&sc->sc_rngto, 1);
callout_reset(&sc->sc_rngto, hz*safe_rnginterval, safe_rng, sc);
}
#endif /* SAFE_NO_RNG */
#ifdef SAFE_DEBUG
safec = sc; /* for use by hw.safe.dump */
#endif
return (0);
bad4:
crypto_unregister_all(sc->sc_cid);
bad3:
bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
bad2:
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);
bad1:
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr);
bad:
return (ENXIO);
}
/*
* Detach a device that successfully probed.
*/
static int
safe_detach(device_t dev)
{
struct safe_softc *sc = device_get_softc(dev);
/* XXX wait/abort active ops */
WRITE_REG(sc, SAFE_HI_MASK, 0); /* disable interrupts */
callout_stop(&sc->sc_rngto);
crypto_unregister_all(sc->sc_cid);
#ifdef SAFE_RNDTEST
if (sc->sc_rndtest)
rndtest_detach(sc->sc_rndtest);
#endif
safe_cleanchip(sc);
safe_dma_free(sc, &sc->sc_dpalloc);
safe_dma_free(sc, &sc->sc_spalloc);
mtx_destroy(&sc->sc_ringmtx);
safe_dma_free(sc, &sc->sc_ringalloc);
bus_generic_detach(dev);
bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);
bus_dma_tag_destroy(sc->sc_srcdmat);
bus_dma_tag_destroy(sc->sc_dstdmat);
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr);
return (0);
}
/*
* Stop all chip i/o so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static int
safe_shutdown(device_t dev)
{
#ifdef notyet
safe_stop(device_get_softc(dev));
#endif
return (0);
}
/*
* Device suspend routine.
*/
static int
safe_suspend(device_t dev)
{
struct safe_softc *sc = device_get_softc(dev);
#ifdef notyet
/* XXX stop the device and save PCI settings */
#endif
sc->sc_suspended = 1;
return (0);
}
static int
safe_resume(device_t dev)
{
struct safe_softc *sc = device_get_softc(dev);
#ifdef notyet
/* XXX retore PCI settings and start the device */
#endif
sc->sc_suspended = 0;
return (0);
}
/*
* SafeXcel Interrupt routine
*/
static void
safe_intr(void *arg)
{
struct safe_softc *sc = arg;
volatile u_int32_t stat;
stat = READ_REG(sc, SAFE_HM_STAT);
if (stat == 0) /* shared irq, not for us */
return;
WRITE_REG(sc, SAFE_HI_CLR, stat); /* IACK */
if ((stat & SAFE_INT_PE_DDONE)) {
/*
* Descriptor(s) done; scan the ring and
* process completed operations.
*/
mtx_lock(&sc->sc_ringmtx);
while (sc->sc_back != sc->sc_front) {
struct safe_ringentry *re = sc->sc_back;
#ifdef SAFE_DEBUG
if (safe_debug) {
safe_dump_ringstate(sc, __func__);
safe_dump_request(sc, __func__, re);
}
#endif
/*
* safe_process marks ring entries that were allocated
* but not used with a csr of zero. This insures the
* ring front pointer never needs to be set backwards
* in the event that an entry is allocated but not used
* because of a setup error.
*/
if (re->re_desc.d_csr != 0) {
if (!SAFE_PE_CSR_IS_DONE(re->re_desc.d_csr))
break;
if (!SAFE_PE_LEN_IS_DONE(re->re_desc.d_len))
break;
sc->sc_nqchip--;
safe_callback(sc, re);
}
if (++(sc->sc_back) == sc->sc_ringtop)
sc->sc_back = sc->sc_ring;
}
mtx_unlock(&sc->sc_ringmtx);
}
/*
* Check to see if we got any DMA Error
*/
if (stat & SAFE_INT_PE_ERROR) {
DPRINTF(("dmaerr dmastat %08x\n",
READ_REG(sc, SAFE_PE_DMASTAT)));
safestats.st_dmaerr++;
safe_totalreset(sc);
#if 0
safe_feed(sc);
#endif
}
if (sc->sc_needwakeup) { /* XXX check high watermark */
int wakeup = sc->sc_needwakeup & (CRYPTO_SYMQ|CRYPTO_ASYMQ);
DPRINTF(("%s: wakeup crypto %x\n", __func__,
sc->sc_needwakeup));
sc->sc_needwakeup &= ~wakeup;
crypto_unblock(sc->sc_cid, wakeup);
}
}
/*
* safe_feed() - post a request to chip
*/
static void
safe_feed(struct safe_softc *sc, struct safe_ringentry *re)
{
bus_dmamap_sync(sc->sc_srcdmat, re->re_src_map, BUS_DMASYNC_PREWRITE);
if (re->re_dst_map != NULL)
bus_dmamap_sync(sc->sc_dstdmat, re->re_dst_map,
BUS_DMASYNC_PREREAD);
/* XXX have no smaller granularity */
safe_dma_sync(&sc->sc_ringalloc,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
safe_dma_sync(&sc->sc_spalloc, BUS_DMASYNC_PREWRITE);
safe_dma_sync(&sc->sc_dpalloc, BUS_DMASYNC_PREWRITE);
#ifdef SAFE_DEBUG
if (safe_debug) {
safe_dump_ringstate(sc, __func__);
safe_dump_request(sc, __func__, re);
}
#endif
sc->sc_nqchip++;
if (sc->sc_nqchip > safestats.st_maxqchip)
safestats.st_maxqchip = sc->sc_nqchip;
/* poke h/w to check descriptor ring, any value can be written */
WRITE_REG(sc, SAFE_HI_RD_DESCR, 0);
}
#define N(a) (sizeof(a) / sizeof (a[0]))
static void
safe_setup_enckey(struct safe_session *ses, const void *key)
{
int i;
bcopy(key, ses->ses_key, ses->ses_klen);
/* PE is little-endian, insure proper byte order */
for (i = 0; i < N(ses->ses_key); i++)
ses->ses_key[i] = htole32(ses->ses_key[i]);
}
static void
safe_setup_mackey(struct safe_session *ses, int algo, const uint8_t *key,
int klen)
{
SHA1_CTX sha1ctx;
int i;
hmac_init_ipad(&auth_hash_hmac_sha1, key, klen, &sha1ctx);
bcopy(sha1ctx.h.b32, ses->ses_hminner, sizeof(sha1ctx.h.b32));
hmac_init_opad(&auth_hash_hmac_sha1, key, klen, &sha1ctx);
bcopy(sha1ctx.h.b32, ses->ses_hmouter, sizeof(sha1ctx.h.b32));
explicit_bzero(&sha1ctx, sizeof(sha1ctx));
/* PE is little-endian, insure proper byte order */
for (i = 0; i < N(ses->ses_hminner); i++) {
ses->ses_hminner[i] = htole32(ses->ses_hminner[i]);
ses->ses_hmouter[i] = htole32(ses->ses_hmouter[i]);
}
}
#undef N
static bool
safe_auth_supported(struct safe_softc *sc,
const struct crypto_session_params *csp)
{
switch (csp->csp_auth_alg) {
case CRYPTO_SHA1_HMAC:
if ((sc->sc_devinfo & SAFE_DEVINFO_SHA1) == 0)
return (false);
break;
default:
return (false);
}
return (true);
}
static bool
safe_cipher_supported(struct safe_softc *sc,
const struct crypto_session_params *csp)
{
switch (csp->csp_cipher_alg) {
case CRYPTO_AES_CBC:
if ((sc->sc_devinfo & SAFE_DEVINFO_AES) == 0)
return (false);
if (csp->csp_ivlen != 16)
return (false);
if (csp->csp_cipher_klen != 16 &&
csp->csp_cipher_klen != 24 &&
csp->csp_cipher_klen != 32)
return (false);
break;
}
return (true);
}
static int
safe_probesession(device_t dev, const struct crypto_session_params *csp)
{
struct safe_softc *sc = device_get_softc(dev);
if (csp->csp_flags != 0)
return (EINVAL);
switch (csp->csp_mode) {
case CSP_MODE_DIGEST:
if (!safe_auth_supported(sc, csp))
return (EINVAL);
break;
case CSP_MODE_CIPHER:
if (!safe_cipher_supported(sc, csp))
return (EINVAL);
break;
case CSP_MODE_ETA:
if (!safe_auth_supported(sc, csp) ||
!safe_cipher_supported(sc, csp))
return (EINVAL);
break;
default:
return (EINVAL);
}
return (CRYPTODEV_PROBE_HARDWARE);
}
/*
* Allocate a new 'session'.
*/
static int
safe_newsession(device_t dev, crypto_session_t cses,
const struct crypto_session_params *csp)
{
struct safe_session *ses;
ses = crypto_get_driver_session(cses);
if (csp->csp_cipher_alg != 0) {
ses->ses_klen = csp->csp_cipher_klen;
if (csp->csp_cipher_key != NULL)
safe_setup_enckey(ses, csp->csp_cipher_key);
}
if (csp->csp_auth_alg != 0) {
ses->ses_mlen = csp->csp_auth_mlen;
if (ses->ses_mlen == 0) {
ses->ses_mlen = SHA1_HASH_LEN;
}
if (csp->csp_auth_key != NULL) {
safe_setup_mackey(ses, csp->csp_auth_alg,
csp->csp_auth_key, csp->csp_auth_klen);
}
}
return (0);
}
static void
safe_op_cb(void *arg, bus_dma_segment_t *seg, int nsegs, int error)
{
struct safe_operand *op = arg;
DPRINTF(("%s: nsegs %d error %d\n", __func__,
nsegs, error));
if (error != 0)
return;
op->nsegs = nsegs;
bcopy(seg, op->segs, nsegs * sizeof (seg[0]));
}
static int
safe_process(device_t dev, struct cryptop *crp, int hint)
{
struct safe_softc *sc = device_get_softc(dev);
const struct crypto_session_params *csp;
int err = 0, i, nicealign, uniform;
int bypass, oplen;
int16_t coffset;
struct safe_session *ses;
struct safe_ringentry *re;
struct safe_sarec *sa;
struct safe_pdesc *pd;
u_int32_t cmd0, cmd1, staterec;
mtx_lock(&sc->sc_ringmtx);
if (sc->sc_front == sc->sc_back && sc->sc_nqchip != 0) {
safestats.st_ringfull++;
sc->sc_needwakeup |= CRYPTO_SYMQ;
mtx_unlock(&sc->sc_ringmtx);
return (ERESTART);
}
re = sc->sc_front;
staterec = re->re_sa.sa_staterec; /* save */
/* NB: zero everything but the PE descriptor */
bzero(&re->re_sa, sizeof(struct safe_ringentry) - sizeof(re->re_desc));
re->re_sa.sa_staterec = staterec; /* restore */
re->re_crp = crp;
sa = &re->re_sa;
ses = crypto_get_driver_session(crp->crp_session);
csp = crypto_get_params(crp->crp_session);
cmd0 = SAFE_SA_CMD0_BASIC; /* basic group operation */
cmd1 = 0;
switch (csp->csp_mode) {
case CSP_MODE_DIGEST:
cmd0 |= SAFE_SA_CMD0_OP_HASH;
break;
case CSP_MODE_CIPHER:
cmd0 |= SAFE_SA_CMD0_OP_CRYPT;
break;
case CSP_MODE_ETA:
cmd0 |= SAFE_SA_CMD0_OP_BOTH;
break;
}
if (csp->csp_cipher_alg != 0) {
if (crp->crp_cipher_key != NULL)
safe_setup_enckey(ses, crp->crp_cipher_key);
switch (csp->csp_cipher_alg) {
case CRYPTO_AES_CBC:
cmd0 |= SAFE_SA_CMD0_AES;
cmd1 |= SAFE_SA_CMD1_CBC;
if (ses->ses_klen * 8 == 128)
cmd1 |= SAFE_SA_CMD1_AES128;
else if (ses->ses_klen * 8 == 192)
cmd1 |= SAFE_SA_CMD1_AES192;
else
cmd1 |= SAFE_SA_CMD1_AES256;
}
/*
* Setup encrypt/decrypt state. When using basic ops
* we can't use an inline IV because hash/crypt offset
* must be from the end of the IV to the start of the
* crypt data and this leaves out the preceding header
* from the hash calculation. Instead we place the IV
* in the state record and set the hash/crypt offset to
* copy both the header+IV.
*/
crypto_read_iv(crp, re->re_sastate.sa_saved_iv);
cmd0 |= SAFE_SA_CMD0_IVLD_STATE;
if (CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) {
cmd0 |= SAFE_SA_CMD0_OUTBOUND;
/*
* XXX: I suspect we don't need this since we
* don't save the returned IV.
*/
cmd0 |= SAFE_SA_CMD0_SAVEIV;
} else {
cmd0 |= SAFE_SA_CMD0_INBOUND;
}
/*
* For basic encryption use the zero pad algorithm.
* This pads results to an 8-byte boundary and
* suppresses padding verification for inbound (i.e.
* decrypt) operations.
*
* NB: Not sure if the 8-byte pad boundary is a problem.
*/
cmd0 |= SAFE_SA_CMD0_PAD_ZERO;
/* XXX assert key bufs have the same size */
bcopy(ses->ses_key, sa->sa_key, sizeof(sa->sa_key));
}
if (csp->csp_auth_alg != 0) {
if (crp->crp_auth_key != NULL) {
safe_setup_mackey(ses, csp->csp_auth_alg,
crp->crp_auth_key, csp->csp_auth_klen);
}
switch (csp->csp_auth_alg) {
case CRYPTO_SHA1_HMAC:
cmd0 |= SAFE_SA_CMD0_SHA1;
cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */
break;
}
/*
* Digest data is loaded from the SA and the hash
* result is saved to the state block where we
* retrieve it for return to the caller.
*/
/* XXX assert digest bufs have the same size */
bcopy(ses->ses_hminner, sa->sa_indigest,
sizeof(sa->sa_indigest));
bcopy(ses->ses_hmouter, sa->sa_outdigest,
sizeof(sa->sa_outdigest));
cmd0 |= SAFE_SA_CMD0_HSLD_SA | SAFE_SA_CMD0_SAVEHASH;
re->re_flags |= SAFE_QFLAGS_COPYOUTICV;
}
if (csp->csp_mode == CSP_MODE_ETA) {
/*
* The driver only supports ETA requests where there
* is no gap between the AAD and payload.
*/
if (crp->crp_aad_length != 0 &&
crp->crp_aad_start + crp->crp_aad_length !=
crp->crp_payload_start) {
safestats.st_lenmismatch++;
err = EINVAL;
goto errout;
}
if (crp->crp_aad_length != 0)
bypass = crp->crp_aad_start;
else
bypass = crp->crp_payload_start;
coffset = crp->crp_aad_length;
oplen = crp->crp_payload_start + crp->crp_payload_length;
#ifdef SAFE_DEBUG
if (safe_debug) {
printf("AAD: skip %d, len %d, digest %d\n",
crp->crp_aad_start, crp->crp_aad_length,
crp->crp_digest_start);
printf("payload: skip %d, len %d, IV %d\n",
crp->crp_payload_start, crp->crp_payload_length,
crp->crp_iv_start);
printf("bypass %d coffset %d oplen %d\n",
bypass, coffset, oplen);
}
#endif
if (coffset & 3) { /* offset must be 32-bit aligned */
DPRINTF(("%s: coffset %u misaligned\n",
__func__, coffset));
safestats.st_coffmisaligned++;
err = EINVAL;
goto errout;
}
coffset >>= 2;
if (coffset > 255) { /* offset must be <256 dwords */
DPRINTF(("%s: coffset %u too big\n",
__func__, coffset));
safestats.st_cofftoobig++;
err = EINVAL;
goto errout;
}
/*
* Tell the hardware to copy the header to the output.
* The header is defined as the data from the end of
* the bypass to the start of data to be encrypted.
* Typically this is the inline IV. Note that you need
* to do this even if src+dst are the same; it appears
* that w/o this bit the crypted data is written
* immediately after the bypass data.
*/
cmd1 |= SAFE_SA_CMD1_HDRCOPY;
/*
* Disable IP header mutable bit handling. This is
* needed to get correct HMAC calculations.
*/
cmd1 |= SAFE_SA_CMD1_MUTABLE;
} else {
bypass = crp->crp_payload_start;
oplen = bypass + crp->crp_payload_length;
coffset = 0;
}
/* XXX verify multiple of 4 when using s/g */
if (bypass > 96) { /* bypass offset must be <= 96 bytes */
DPRINTF(("%s: bypass %u too big\n", __func__, bypass));
safestats.st_bypasstoobig++;
err = EINVAL;
goto errout;
}
if (bus_dmamap_create(sc->sc_srcdmat, BUS_DMA_NOWAIT, &re->re_src_map)) {
safestats.st_nomap++;
err = ENOMEM;
goto errout;
}
if (bus_dmamap_load_crp(sc->sc_srcdmat, re->re_src_map, crp, safe_op_cb,
&re->re_src, BUS_DMA_NOWAIT) != 0) {
bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map);
re->re_src_map = NULL;
safestats.st_noload++;
err = ENOMEM;
goto errout;
}
re->re_src_mapsize = crypto_buffer_len(&crp->crp_buf);
nicealign = safe_dmamap_aligned(&re->re_src);
uniform = safe_dmamap_uniform(&re->re_src);
DPRINTF(("src nicealign %u uniform %u nsegs %u\n",
nicealign, uniform, re->re_src.nsegs));
if (re->re_src.nsegs > 1) {
re->re_desc.d_src = sc->sc_spalloc.dma_paddr +
((caddr_t) sc->sc_spfree - (caddr_t) sc->sc_spring);
for (i = 0; i < re->re_src_nsegs; i++) {
/* NB: no need to check if there's space */
pd = sc->sc_spfree;
if (++(sc->sc_spfree) == sc->sc_springtop)
sc->sc_spfree = sc->sc_spring;
KASSERT((pd->pd_flags&3) == 0 ||
(pd->pd_flags&3) == SAFE_PD_DONE,
("bogus source particle descriptor; flags %x",
pd->pd_flags));
pd->pd_addr = re->re_src_segs[i].ds_addr;
pd->pd_size = re->re_src_segs[i].ds_len;
pd->pd_flags = SAFE_PD_READY;
}
cmd0 |= SAFE_SA_CMD0_IGATHER;
} else {
/*
* No need for gather, reference the operand directly.
*/
re->re_desc.d_src = re->re_src_segs[0].ds_addr;
}
if (csp->csp_mode == CSP_MODE_DIGEST) {
/*
* Hash op; no destination needed.
*/
} else {
if (nicealign && uniform == 1) {
/*
* Source layout is suitable for direct
* sharing of the DMA map and segment list.
*/
re->re_dst = re->re_src;
} else if (nicealign && uniform == 2) {
/*
* The source is properly aligned but requires a
* different particle list to handle DMA of the
* result. Create a new map and do the load to
* create the segment list. The particle
* descriptor setup code below will handle the
* rest.
*/
if (bus_dmamap_create(sc->sc_dstdmat, BUS_DMA_NOWAIT,
&re->re_dst_map)) {
safestats.st_nomap++;
err = ENOMEM;
goto errout;
}
if (bus_dmamap_load_crp(sc->sc_dstdmat, re->re_dst_map,
crp, safe_op_cb, &re->re_dst, BUS_DMA_NOWAIT) !=
0) {
bus_dmamap_destroy(sc->sc_dstdmat,
re->re_dst_map);
re->re_dst_map = NULL;
safestats.st_noload++;
err = ENOMEM;
goto errout;
}
} else if (crp->crp_buf.cb_type == CRYPTO_BUF_MBUF) {
int totlen, len;
struct mbuf *m, *top, **mp;
/*
* DMA constraints require that we allocate a
* new mbuf chain for the destination. We
* allocate an entire new set of mbufs of
* optimal/required size and then tell the
* hardware to copy any bits that are not
* created as a byproduct of the operation.
*/
if (!nicealign)
safestats.st_unaligned++;
if (!uniform)
safestats.st_notuniform++;
totlen = re->re_src_mapsize;
if (crp->crp_buf.cb_mbuf->m_flags & M_PKTHDR) {
len = MHLEN;
MGETHDR(m, M_NOWAIT, MT_DATA);
if (m && !m_dup_pkthdr(m, crp->crp_buf.cb_mbuf,
M_NOWAIT)) {
m_free(m);
m = NULL;
}
} else {
len = MLEN;
MGET(m, M_NOWAIT, MT_DATA);
}
if (m == NULL) {
safestats.st_nombuf++;
err = sc->sc_nqchip ? ERESTART : ENOMEM;
goto errout;
}
if (totlen >= MINCLSIZE) {
if (!(MCLGET(m, M_NOWAIT))) {
m_free(m);
safestats.st_nomcl++;
err = sc->sc_nqchip ?
ERESTART : ENOMEM;
goto errout;
}
len = MCLBYTES;
}
m->m_len = len;
top = NULL;
mp = &top;
while (totlen > 0) {
if (top) {
MGET(m, M_NOWAIT, MT_DATA);
if (m == NULL) {
m_freem(top);
safestats.st_nombuf++;
err = sc->sc_nqchip ?
ERESTART : ENOMEM;
goto errout;
}
len = MLEN;
}
if (top && totlen >= MINCLSIZE) {
if (!(MCLGET(m, M_NOWAIT))) {
*mp = m;
m_freem(top);
safestats.st_nomcl++;
err = sc->sc_nqchip ?
ERESTART : ENOMEM;
goto errout;
}
len = MCLBYTES;
}
m->m_len = len = min(totlen, len);
totlen -= len;
*mp = m;
mp = &m->m_next;
}
re->re_dst_m = top;
if (bus_dmamap_create(sc->sc_dstdmat,
BUS_DMA_NOWAIT, &re->re_dst_map) != 0) {
safestats.st_nomap++;
err = ENOMEM;
goto errout;
}
if (bus_dmamap_load_mbuf_sg(sc->sc_dstdmat,
re->re_dst_map, top, re->re_dst_segs,
&re->re_dst_nsegs, 0) != 0) {
bus_dmamap_destroy(sc->sc_dstdmat,
re->re_dst_map);
re->re_dst_map = NULL;
safestats.st_noload++;
err = ENOMEM;
goto errout;
}
re->re_dst_mapsize = re->re_src_mapsize;
if (re->re_src.mapsize > oplen) {
/*
* There's data following what the
* hardware will copy for us. If this
* isn't just the ICV (that's going to
* be written on completion), copy it
* to the new mbufs
*/
if (!(csp->csp_mode == CSP_MODE_ETA &&
(re->re_src.mapsize-oplen) == ses->ses_mlen &&
crp->crp_digest_start == oplen))
safe_mcopy(crp->crp_buf.cb_mbuf,
re->re_dst_m, oplen);
else
safestats.st_noicvcopy++;
}
} else {
if (!nicealign) {
safestats.st_iovmisaligned++;
err = EINVAL;
goto errout;
} else {
/*
* There's no way to handle the DMA
* requirements with this uio. We
* could create a separate DMA area for
* the result and then copy it back,
* but for now we just bail and return
* an error. Note that uio requests
* > SAFE_MAX_DSIZE are handled because
* the DMA map and segment list for the
* destination wil result in a
* destination particle list that does
* the necessary scatter DMA.
*/
safestats.st_iovnotuniform++;
err = EINVAL;
goto errout;
}
}
if (re->re_dst.nsegs > 1) {
re->re_desc.d_dst = sc->sc_dpalloc.dma_paddr +
((caddr_t) sc->sc_dpfree - (caddr_t) sc->sc_dpring);
for (i = 0; i < re->re_dst_nsegs; i++) {
pd = sc->sc_dpfree;
KASSERT((pd->pd_flags&3) == 0 ||
(pd->pd_flags&3) == SAFE_PD_DONE,
("bogus dest particle descriptor; flags %x",
pd->pd_flags));
if (++(sc->sc_dpfree) == sc->sc_dpringtop)
sc->sc_dpfree = sc->sc_dpring;
pd->pd_addr = re->re_dst_segs[i].ds_addr;
pd->pd_flags = SAFE_PD_READY;
}
cmd0 |= SAFE_SA_CMD0_OSCATTER;
} else {
/*
* No need for scatter, reference the operand directly.
*/
re->re_desc.d_dst = re->re_dst_segs[0].ds_addr;
}
}
/*
* All done with setup; fillin the SA command words
* and the packet engine descriptor. The operation
* is now ready for submission to the hardware.
*/
sa->sa_cmd0 = cmd0 | SAFE_SA_CMD0_IPCI | SAFE_SA_CMD0_OPCI;
sa->sa_cmd1 = cmd1
| (coffset << SAFE_SA_CMD1_OFFSET_S)
| SAFE_SA_CMD1_SAREV1 /* Rev 1 SA data structure */
| SAFE_SA_CMD1_SRPCI
;
/*
* NB: the order of writes is important here. In case the
* chip is scanning the ring because of an outstanding request
* it might nab this one too. In that case we need to make
* sure the setup is complete before we write the length
* field of the descriptor as it signals the descriptor is
* ready for processing.
*/
re->re_desc.d_csr = SAFE_PE_CSR_READY | SAFE_PE_CSR_SAPCI;
if (csp->csp_auth_alg != 0)
re->re_desc.d_csr |= SAFE_PE_CSR_LOADSA | SAFE_PE_CSR_HASHFINAL;
re->re_desc.d_len = oplen
| SAFE_PE_LEN_READY
| (bypass << SAFE_PE_LEN_BYPASS_S)
;
safestats.st_ipackets++;
safestats.st_ibytes += oplen;
if (++(sc->sc_front) == sc->sc_ringtop)
sc->sc_front = sc->sc_ring;
/* XXX honor batching */
safe_feed(sc, re);
mtx_unlock(&sc->sc_ringmtx);
return (0);
errout:
if (re->re_dst_m != NULL)
m_freem(re->re_dst_m);
if (re->re_dst_map != NULL && re->re_dst_map != re->re_src_map) {
bus_dmamap_unload(sc->sc_dstdmat, re->re_dst_map);
bus_dmamap_destroy(sc->sc_dstdmat, re->re_dst_map);
}
if (re->re_src_map != NULL) {
bus_dmamap_unload(sc->sc_srcdmat, re->re_src_map);
bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map);
}
mtx_unlock(&sc->sc_ringmtx);
if (err != ERESTART) {
crp->crp_etype = err;
crypto_done(crp);
err = 0;
} else {
sc->sc_needwakeup |= CRYPTO_SYMQ;
}
return (err);
}
static void
safe_callback(struct safe_softc *sc, struct safe_ringentry *re)
{
const struct crypto_session_params *csp;
struct cryptop *crp = (struct cryptop *)re->re_crp;
struct safe_session *ses;
uint8_t hash[HASH_MAX_LEN];
ses = crypto_get_driver_session(crp->crp_session);
csp = crypto_get_params(crp->crp_session);
safestats.st_opackets++;
safestats.st_obytes += re->re_dst.mapsize;
safe_dma_sync(&sc->sc_ringalloc,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
if (re->re_desc.d_csr & SAFE_PE_CSR_STATUS) {
device_printf(sc->sc_dev, "csr 0x%x cmd0 0x%x cmd1 0x%x\n",
re->re_desc.d_csr,
re->re_sa.sa_cmd0, re->re_sa.sa_cmd1);
safestats.st_peoperr++;
crp->crp_etype = EIO; /* something more meaningful? */
}
/*
* XXX: Should crp_buf.cb_mbuf be updated to re->re_dst_m if
* it is non-NULL?
*/
if (re->re_dst_map != NULL && re->re_dst_map != re->re_src_map) {
bus_dmamap_sync(sc->sc_dstdmat, re->re_dst_map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->sc_dstdmat, re->re_dst_map);
bus_dmamap_destroy(sc->sc_dstdmat, re->re_dst_map);
}
bus_dmamap_sync(sc->sc_srcdmat, re->re_src_map, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_srcdmat, re->re_src_map);
bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map);
if (re->re_flags & SAFE_QFLAGS_COPYOUTICV) {
if (csp->csp_auth_alg == CRYPTO_SHA1_HMAC) {
/*
* SHA-1 ICV's are byte-swapped; fix 'em up
* before copying them to their destination.
*/
re->re_sastate.sa_saved_indigest[0] =
bswap32(re->re_sastate.sa_saved_indigest[0]);
re->re_sastate.sa_saved_indigest[1] =
bswap32(re->re_sastate.sa_saved_indigest[1]);
re->re_sastate.sa_saved_indigest[2] =
bswap32(re->re_sastate.sa_saved_indigest[2]);
}
if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
crypto_copydata(crp, crp->crp_digest_start,
ses->ses_mlen, hash);
if (timingsafe_bcmp(re->re_sastate.sa_saved_indigest,
hash, ses->ses_mlen) != 0)
crp->crp_etype = EBADMSG;
} else
crypto_copyback(crp, crp->crp_digest_start,
ses->ses_mlen, re->re_sastate.sa_saved_indigest);
}
crypto_done(crp);
}
/*
* Copy all data past offset from srcm to dstm.
*/
static void
safe_mcopy(struct mbuf *srcm, struct mbuf *dstm, u_int offset)
{
u_int j, dlen, slen;
caddr_t dptr, sptr;
/*
* Advance src and dst to offset.
*/
j = offset;
while (j >= srcm->m_len) {
j -= srcm->m_len;
srcm = srcm->m_next;
if (srcm == NULL)
return;
}
sptr = mtod(srcm, caddr_t) + j;
slen = srcm->m_len - j;
j = offset;
while (j >= dstm->m_len) {
j -= dstm->m_len;
dstm = dstm->m_next;
if (dstm == NULL)
return;
}
dptr = mtod(dstm, caddr_t) + j;
dlen = dstm->m_len - j;
/*
* Copy everything that remains.
*/
for (;;) {
j = min(slen, dlen);
bcopy(sptr, dptr, j);
if (slen == j) {
srcm = srcm->m_next;
if (srcm == NULL)
return;
sptr = srcm->m_data;
slen = srcm->m_len;
} else
sptr += j, slen -= j;
if (dlen == j) {
dstm = dstm->m_next;
if (dstm == NULL)
return;
dptr = dstm->m_data;
dlen = dstm->m_len;
} else
dptr += j, dlen -= j;
}
}
#ifndef SAFE_NO_RNG
#define SAFE_RNG_MAXWAIT 1000
static void
safe_rng_init(struct safe_softc *sc)
{
u_int32_t w, v;
int i;
WRITE_REG(sc, SAFE_RNG_CTRL, 0);
/* use default value according to the manual */
WRITE_REG(sc, SAFE_RNG_CNFG, 0x834); /* magic from SafeNet */
WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
/*
* There is a bug in rev 1.0 of the 1140 that when the RNG
* is brought out of reset the ready status flag does not
* work until the RNG has finished its internal initialization.
*
* So in order to determine the device is through its
* initialization we must read the data register, using the
* status reg in the read in case it is initialized. Then read
* the data register until it changes from the first read.
* Once it changes read the data register until it changes
* again. At this time the RNG is considered initialized.
* This could take between 750ms - 1000ms in time.
*/
i = 0;
w = READ_REG(sc, SAFE_RNG_OUT);
do {
v = READ_REG(sc, SAFE_RNG_OUT);
if (v != w) {
w = v;
break;
}
DELAY(10);
} while (++i < SAFE_RNG_MAXWAIT);
/* Wait Until data changes again */
i = 0;
do {
v = READ_REG(sc, SAFE_RNG_OUT);
if (v != w)
break;
DELAY(10);
} while (++i < SAFE_RNG_MAXWAIT);
}
static __inline void
safe_rng_disable_short_cycle(struct safe_softc *sc)
{
WRITE_REG(sc, SAFE_RNG_CTRL,
READ_REG(sc, SAFE_RNG_CTRL) &~ SAFE_RNG_CTRL_SHORTEN);
}
static __inline void
safe_rng_enable_short_cycle(struct safe_softc *sc)
{
WRITE_REG(sc, SAFE_RNG_CTRL,
READ_REG(sc, SAFE_RNG_CTRL) | SAFE_RNG_CTRL_SHORTEN);
}
static __inline u_int32_t
safe_rng_read(struct safe_softc *sc)
{
int i;
i = 0;
while (READ_REG(sc, SAFE_RNG_STAT) != 0 && ++i < SAFE_RNG_MAXWAIT)
;
return READ_REG(sc, SAFE_RNG_OUT);
}
static void
safe_rng(void *arg)
{
struct safe_softc *sc = arg;
u_int32_t buf[SAFE_RNG_MAXBUFSIZ]; /* NB: maybe move to softc */
u_int maxwords;
int i;
safestats.st_rng++;
/*
* Fetch the next block of data.
*/
maxwords = safe_rngbufsize;
if (maxwords > SAFE_RNG_MAXBUFSIZ)
maxwords = SAFE_RNG_MAXBUFSIZ;
retry:
for (i = 0; i < maxwords; i++)
buf[i] = safe_rng_read(sc);
/*
* Check the comparator alarm count and reset the h/w if
* it exceeds our threshold. This guards against the
* hardware oscillators resonating with external signals.
*/
if (READ_REG(sc, SAFE_RNG_ALM_CNT) > safe_rngmaxalarm) {
u_int32_t freq_inc, w;
DPRINTF(("%s: alarm count %u exceeds threshold %u\n", __func__,
READ_REG(sc, SAFE_RNG_ALM_CNT), safe_rngmaxalarm));
safestats.st_rngalarm++;
safe_rng_enable_short_cycle(sc);
freq_inc = 18;
for (i = 0; i < 64; i++) {
w = READ_REG(sc, SAFE_RNG_CNFG);
freq_inc = ((w + freq_inc) & 0x3fL);
w = ((w & ~0x3fL) | freq_inc);
WRITE_REG(sc, SAFE_RNG_CNFG, w);
WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
(void) safe_rng_read(sc);
DELAY(25);
if (READ_REG(sc, SAFE_RNG_ALM_CNT) == 0) {
safe_rng_disable_short_cycle(sc);
goto retry;
}
freq_inc = 1;
}
safe_rng_disable_short_cycle(sc);
} else
WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0);
(*sc->sc_harvest)(sc->sc_rndtest, buf, maxwords*sizeof (u_int32_t));
callout_reset(&sc->sc_rngto,
hz * (safe_rnginterval ? safe_rnginterval : 1), safe_rng, sc);
}
#endif /* SAFE_NO_RNG */
static void
safe_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
bus_addr_t *paddr = (bus_addr_t*) arg;
*paddr = segs->ds_addr;
}
static int
safe_dma_malloc(
struct safe_softc *sc,
bus_size_t size,
struct safe_dma_alloc *dma,
int mapflags
)
{
int r;
r = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */
sizeof(u_int32_t), 0, /* alignment, bounds */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
size, /* maxsize */
1, /* nsegments */
size, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, NULL, /* locking */
&dma->dma_tag);
if (r != 0) {
device_printf(sc->sc_dev, "safe_dma_malloc: "
"bus_dma_tag_create failed; error %u\n", r);
goto fail_0;
}
r = bus_dmamem_alloc(dma->dma_tag, (void**) &dma->dma_vaddr,
BUS_DMA_NOWAIT, &dma->dma_map);
if (r != 0) {
device_printf(sc->sc_dev, "safe_dma_malloc: "
"bus_dmammem_alloc failed; size %ju, error %u\n",
(uintmax_t)size, r);
goto fail_1;
}
r = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr,
size,
safe_dmamap_cb,
&dma->dma_paddr,
mapflags | BUS_DMA_NOWAIT);
if (r != 0) {
device_printf(sc->sc_dev, "safe_dma_malloc: "
"bus_dmamap_load failed; error %u\n", r);
goto fail_2;
}
dma->dma_size = size;
return (0);
bus_dmamap_unload(dma->dma_tag, dma->dma_map);
fail_2:
bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
fail_1:
bus_dma_tag_destroy(dma->dma_tag);
fail_0:
dma->dma_tag = NULL;
return (r);
}
static void
safe_dma_free(struct safe_softc *sc, struct safe_dma_alloc *dma)
{
bus_dmamap_unload(dma->dma_tag, dma->dma_map);
bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
bus_dma_tag_destroy(dma->dma_tag);
}
/*
* Resets the board. Values in the regesters are left as is
* from the reset (i.e. initial values are assigned elsewhere).
*/
static void
safe_reset_board(struct safe_softc *sc)
{
u_int32_t v;
/*
* Reset the device. The manual says no delay
* is needed between marking and clearing reset.
*/
v = READ_REG(sc, SAFE_PE_DMACFG) &~
(SAFE_PE_DMACFG_PERESET | SAFE_PE_DMACFG_PDRRESET |
SAFE_PE_DMACFG_SGRESET);
WRITE_REG(sc, SAFE_PE_DMACFG, v
| SAFE_PE_DMACFG_PERESET
| SAFE_PE_DMACFG_PDRRESET
| SAFE_PE_DMACFG_SGRESET);
WRITE_REG(sc, SAFE_PE_DMACFG, v);
}
/*
* Initialize registers we need to touch only once.
*/
static void
safe_init_board(struct safe_softc *sc)
{
u_int32_t v, dwords;
v = READ_REG(sc, SAFE_PE_DMACFG);
v &=~ SAFE_PE_DMACFG_PEMODE;
v |= SAFE_PE_DMACFG_FSENA /* failsafe enable */
| SAFE_PE_DMACFG_GPRPCI /* gather ring on PCI */
| SAFE_PE_DMACFG_SPRPCI /* scatter ring on PCI */
| SAFE_PE_DMACFG_ESDESC /* endian-swap descriptors */
| SAFE_PE_DMACFG_ESSA /* endian-swap SA's */
| SAFE_PE_DMACFG_ESPDESC /* endian-swap part. desc's */
;
WRITE_REG(sc, SAFE_PE_DMACFG, v);
#if 0
/* XXX select byte swap based on host byte order */
WRITE_REG(sc, SAFE_ENDIAN, 0x1b);
#endif
if (sc->sc_chiprev == SAFE_REV(1,0)) {
/*
* Avoid large PCI DMA transfers. Rev 1.0 has a bug where
* "target mode transfers" done while the chip is DMA'ing
* >1020 bytes cause the hardware to lockup. To avoid this
* we reduce the max PCI transfer size and use small source
* particle descriptors (<= 256 bytes).
*/
WRITE_REG(sc, SAFE_DMA_CFG, 256);
device_printf(sc->sc_dev,
"Reduce max DMA size to %u words for rev %u.%u WAR\n",
(READ_REG(sc, SAFE_DMA_CFG)>>2) & 0xff,
SAFE_REV_MAJ(sc->sc_chiprev),
SAFE_REV_MIN(sc->sc_chiprev));
}
/* NB: operands+results are overlaid */
WRITE_REG(sc, SAFE_PE_PDRBASE, sc->sc_ringalloc.dma_paddr);
WRITE_REG(sc, SAFE_PE_RDRBASE, sc->sc_ringalloc.dma_paddr);
/*
* Configure ring entry size and number of items in the ring.
*/
KASSERT((sizeof(struct safe_ringentry) % sizeof(u_int32_t)) == 0,
("PE ring entry not 32-bit aligned!"));
dwords = sizeof(struct safe_ringentry) / sizeof(u_int32_t);
WRITE_REG(sc, SAFE_PE_RINGCFG,
(dwords << SAFE_PE_RINGCFG_OFFSET_S) | SAFE_MAX_NQUEUE);
WRITE_REG(sc, SAFE_PE_RINGPOLL, 0); /* disable polling */
WRITE_REG(sc, SAFE_PE_GRNGBASE, sc->sc_spalloc.dma_paddr);
WRITE_REG(sc, SAFE_PE_SRNGBASE, sc->sc_dpalloc.dma_paddr);
WRITE_REG(sc, SAFE_PE_PARTSIZE,
(SAFE_TOTAL_DPART<<16) | SAFE_TOTAL_SPART);
/*
* NB: destination particles are fixed size. We use
* an mbuf cluster and require all results go to
* clusters or smaller.
*/
WRITE_REG(sc, SAFE_PE_PARTCFG, SAFE_MAX_DSIZE);
/* it's now safe to enable PE mode, do it */
WRITE_REG(sc, SAFE_PE_DMACFG, v | SAFE_PE_DMACFG_PEMODE);
/*
* Configure hardware to use level-triggered interrupts and
* to interrupt after each descriptor is processed.
*/
WRITE_REG(sc, SAFE_HI_CFG, SAFE_HI_CFG_LEVEL);
WRITE_REG(sc, SAFE_HI_DESC_CNT, 1);
WRITE_REG(sc, SAFE_HI_MASK, SAFE_INT_PE_DDONE | SAFE_INT_PE_ERROR);
}
/*
* Init PCI registers
*/
static void
safe_init_pciregs(device_t dev)
{
}
/*
* Clean up after a chip crash.
* It is assumed that the caller in splimp()
*/
static void
safe_cleanchip(struct safe_softc *sc)
{
if (sc->sc_nqchip != 0) {
struct safe_ringentry *re = sc->sc_back;
while (re != sc->sc_front) {
if (re->re_desc.d_csr != 0)
safe_free_entry(sc, re);
if (++re == sc->sc_ringtop)
re = sc->sc_ring;
}
sc->sc_back = re;
sc->sc_nqchip = 0;
}
}
/*
* free a safe_q
* It is assumed that the caller is within splimp().
*/
static int
safe_free_entry(struct safe_softc *sc, struct safe_ringentry *re)
{
struct cryptop *crp;
/*
* Free header MCR
*/
if (re->re_dst_m != NULL)
m_freem(re->re_dst_m);
crp = (struct cryptop *)re->re_crp;
re->re_desc.d_csr = 0;
crp->crp_etype = EFAULT;
crypto_done(crp);
return(0);
}
/*
* Routine to reset the chip and clean up.
* It is assumed that the caller is in splimp()
*/
static void
safe_totalreset(struct safe_softc *sc)
{
safe_reset_board(sc);
safe_init_board(sc);
safe_cleanchip(sc);
}
/*
* Is the operand suitable aligned for direct DMA. Each
* segment must be aligned on a 32-bit boundary and all
* but the last segment must be a multiple of 4 bytes.
*/
static int
safe_dmamap_aligned(const struct safe_operand *op)
{
int i;
for (i = 0; i < op->nsegs; i++) {
if (op->segs[i].ds_addr & 3)
return (0);
if (i != (op->nsegs - 1) && (op->segs[i].ds_len & 3))
return (0);
}
return (1);
}
/*
* Is the operand suitable for direct DMA as the destination
* of an operation. The hardware requires that each ``particle''
* but the last in an operation result have the same size. We
* fix that size at SAFE_MAX_DSIZE bytes. This routine returns
* 0 if some segment is not a multiple of of this size, 1 if all
* segments are exactly this size, or 2 if segments are at worst
* a multple of this size.
*/
static int
safe_dmamap_uniform(const struct safe_operand *op)
{
int result = 1;
if (op->nsegs > 0) {
int i;
for (i = 0; i < op->nsegs-1; i++) {
if (op->segs[i].ds_len % SAFE_MAX_DSIZE)
return (0);
if (op->segs[i].ds_len != SAFE_MAX_DSIZE)
result = 2;
}
}
return (result);
}
#ifdef SAFE_DEBUG
static void
safe_dump_dmastatus(struct safe_softc *sc, const char *tag)
{
printf("%s: ENDIAN 0x%x SRC 0x%x DST 0x%x STAT 0x%x\n"
, tag
, READ_REG(sc, SAFE_DMA_ENDIAN)
, READ_REG(sc, SAFE_DMA_SRCADDR)
, READ_REG(sc, SAFE_DMA_DSTADDR)
, READ_REG(sc, SAFE_DMA_STAT)
);
}
static void
safe_dump_intrstate(struct safe_softc *sc, const char *tag)
{
printf("%s: HI_CFG 0x%x HI_MASK 0x%x HI_DESC_CNT 0x%x HU_STAT 0x%x HM_STAT 0x%x\n"
, tag
, READ_REG(sc, SAFE_HI_CFG)
, READ_REG(sc, SAFE_HI_MASK)
, READ_REG(sc, SAFE_HI_DESC_CNT)
, READ_REG(sc, SAFE_HU_STAT)
, READ_REG(sc, SAFE_HM_STAT)
);
}
static void
safe_dump_ringstate(struct safe_softc *sc, const char *tag)
{
u_int32_t estat = READ_REG(sc, SAFE_PE_ERNGSTAT);
/* NB: assume caller has lock on ring */
printf("%s: ERNGSTAT %x (next %u) back %lu front %lu\n",
tag,
estat, (estat >> SAFE_PE_ERNGSTAT_NEXT_S),
(unsigned long)(sc->sc_back - sc->sc_ring),
(unsigned long)(sc->sc_front - sc->sc_ring));
}
static void
safe_dump_request(struct safe_softc *sc, const char* tag, struct safe_ringentry *re)
{
int ix, nsegs;
ix = re - sc->sc_ring;
printf("%s: %p (%u): csr %x src %x dst %x sa %x len %x\n"
, tag
, re, ix
, re->re_desc.d_csr
, re->re_desc.d_src
, re->re_desc.d_dst
, re->re_desc.d_sa
, re->re_desc.d_len
);
if (re->re_src.nsegs > 1) {
ix = (re->re_desc.d_src - sc->sc_spalloc.dma_paddr) /
sizeof(struct safe_pdesc);
for (nsegs = re->re_src.nsegs; nsegs; nsegs--) {
printf(" spd[%u] %p: %p size %u flags %x"
, ix, &sc->sc_spring[ix]
, (caddr_t)(uintptr_t) sc->sc_spring[ix].pd_addr
, sc->sc_spring[ix].pd_size
, sc->sc_spring[ix].pd_flags
);
if (sc->sc_spring[ix].pd_size == 0)
printf(" (zero!)");
printf("\n");
if (++ix == SAFE_TOTAL_SPART)
ix = 0;
}
}
if (re->re_dst.nsegs > 1) {
ix = (re->re_desc.d_dst - sc->sc_dpalloc.dma_paddr) /
sizeof(struct safe_pdesc);
for (nsegs = re->re_dst.nsegs; nsegs; nsegs--) {
printf(" dpd[%u] %p: %p flags %x\n"
, ix, &sc->sc_dpring[ix]
, (caddr_t)(uintptr_t) sc->sc_dpring[ix].pd_addr
, sc->sc_dpring[ix].pd_flags
);
if (++ix == SAFE_TOTAL_DPART)
ix = 0;
}
}
printf("sa: cmd0 %08x cmd1 %08x staterec %x\n",
re->re_sa.sa_cmd0, re->re_sa.sa_cmd1, re->re_sa.sa_staterec);
printf("sa: key %x %x %x %x %x %x %x %x\n"
, re->re_sa.sa_key[0]
, re->re_sa.sa_key[1]
, re->re_sa.sa_key[2]
, re->re_sa.sa_key[3]
, re->re_sa.sa_key[4]
, re->re_sa.sa_key[5]
, re->re_sa.sa_key[6]
, re->re_sa.sa_key[7]
);
printf("sa: indigest %x %x %x %x %x\n"
, re->re_sa.sa_indigest[0]
, re->re_sa.sa_indigest[1]
, re->re_sa.sa_indigest[2]
, re->re_sa.sa_indigest[3]
, re->re_sa.sa_indigest[4]
);
printf("sa: outdigest %x %x %x %x %x\n"
, re->re_sa.sa_outdigest[0]
, re->re_sa.sa_outdigest[1]
, re->re_sa.sa_outdigest[2]
, re->re_sa.sa_outdigest[3]
, re->re_sa.sa_outdigest[4]
);
printf("sr: iv %x %x %x %x\n"
, re->re_sastate.sa_saved_iv[0]
, re->re_sastate.sa_saved_iv[1]
, re->re_sastate.sa_saved_iv[2]
, re->re_sastate.sa_saved_iv[3]
);
printf("sr: hashbc %u indigest %x %x %x %x %x\n"
, re->re_sastate.sa_saved_hashbc
, re->re_sastate.sa_saved_indigest[0]
, re->re_sastate.sa_saved_indigest[1]
, re->re_sastate.sa_saved_indigest[2]
, re->re_sastate.sa_saved_indigest[3]
, re->re_sastate.sa_saved_indigest[4]
);
}
static void
safe_dump_ring(struct safe_softc *sc, const char *tag)
{
mtx_lock(&sc->sc_ringmtx);
printf("\nSafeNet Ring State:\n");
safe_dump_intrstate(sc, tag);
safe_dump_dmastatus(sc, tag);
safe_dump_ringstate(sc, tag);
if (sc->sc_nqchip) {
struct safe_ringentry *re = sc->sc_back;
do {
safe_dump_request(sc, tag, re);
if (++re == sc->sc_ringtop)
re = sc->sc_ring;
} while (re != sc->sc_front);
}
mtx_unlock(&sc->sc_ringmtx);
}
static int
sysctl_hw_safe_dump(SYSCTL_HANDLER_ARGS)
{
char dmode[64];
int error;
strncpy(dmode, "", sizeof(dmode) - 1);
dmode[sizeof(dmode) - 1] = '\0';
error = sysctl_handle_string(oidp, &dmode[0], sizeof(dmode), req);
if (error == 0 && req->newptr != NULL) {
struct safe_softc *sc = safec;
if (!sc)
return EINVAL;
if (strncmp(dmode, "dma", 3) == 0)
safe_dump_dmastatus(sc, "safe0");
else if (strncmp(dmode, "int", 3) == 0)
safe_dump_intrstate(sc, "safe0");
else if (strncmp(dmode, "ring", 4) == 0)
safe_dump_ring(sc, "safe0");
else
return EINVAL;
}
return error;
}
SYSCTL_PROC(_hw_safe, OID_AUTO, dump,
CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0,
sysctl_hw_safe_dump, "A",
"Dump driver state");
#endif /* SAFE_DEBUG */
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