diff options
Diffstat (limited to 'target/linux/generic-2.6/files/crypto/ocf/safe/safe.c')
| -rw-r--r-- | target/linux/generic-2.6/files/crypto/ocf/safe/safe.c | 2288 |
1 files changed, 2288 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files/crypto/ocf/safe/safe.c b/target/linux/generic-2.6/files/crypto/ocf/safe/safe.c new file mode 100644 index 000000000..a77e3a237 --- /dev/null +++ b/target/linux/generic-2.6/files/crypto/ocf/safe/safe.c @@ -0,0 +1,2288 @@ +/*- + * Linux port done by David McCullough <david_mccullough@securecomputing.com> + * Copyright (C) 2004-2007 David McCullough + * The license and original author are listed below. + * + * 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. + * +__FBSDID("$FreeBSD: src/sys/dev/safe/safe.c,v 1.18 2007/03/21 03:42:50 sam Exp $"); + */ + +#ifndef AUTOCONF_INCLUDED +#include <linux/config.h> +#endif +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/wait.h> +#include <linux/sched.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/random.h> +#include <linux/version.h> +#include <linux/skbuff.h> +#include <asm/io.h> + +/* + * SafeNet SafeXcel-1141 hardware crypto accelerator + */ + +#include <cryptodev.h> +#include <uio.h> +#include <safe/safereg.h> +#include <safe/safevar.h> + +#if 1 +#define DPRINTF(a) do { \ + if (debug) { \ + printk("%s: ", sc ? \ + device_get_nameunit(sc->sc_dev) : "safe"); \ + printk a; \ + } \ + } while (0) +#else +#define DPRINTF(a) +#endif + +/* + * until we find a cleaner way, include the BSD md5/sha1 code + * here + */ +#define HMAC_HACK 1 +#ifdef HMAC_HACK +#define LITTLE_ENDIAN 1234 +#define BIG_ENDIAN 4321 +#ifdef __LITTLE_ENDIAN +#define BYTE_ORDER LITTLE_ENDIAN +#endif +#ifdef __BIG_ENDIAN +#define BYTE_ORDER BIG_ENDIAN +#endif +#include <safe/md5.h> +#include <safe/md5.c> +#include <safe/sha1.h> +#include <safe/sha1.c> + +u_int8_t hmac_ipad_buffer[64] = { + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, + 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36 +}; + +u_int8_t hmac_opad_buffer[64] = { + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, + 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C, 0x5C +}; +#endif /* HMAC_HACK */ + +/* add proc entry for this */ +struct safe_stats safestats; + +#define debug safe_debug +int safe_debug = 0; +module_param(safe_debug, int, 0644); +MODULE_PARM_DESC(safe_debug, "Enable debug"); + +static void safe_callback(struct safe_softc *, struct safe_ringentry *); +static void safe_feed(struct safe_softc *, struct safe_ringentry *); +#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG) +static void safe_rng_init(struct safe_softc *); +int safe_rngbufsize = 8; /* 32 bytes each read */ +module_param(safe_rngbufsize, int, 0644); +MODULE_PARM_DESC(safe_rngbufsize, "RNG polling buffer size (32-bit words)"); +int safe_rngmaxalarm = 8; /* max alarms before reset */ +module_param(safe_rngmaxalarm, int, 0644); +MODULE_PARM_DESC(safe_rngmaxalarm, "RNG max alarms before reset"); +#endif /* SAFE_NO_RNG */ + +static void safe_totalreset(struct safe_softc *sc); +static int safe_dmamap_aligned(struct safe_softc *sc, const struct safe_operand *op); +static int safe_dmamap_uniform(struct safe_softc *sc, const struct safe_operand *op); +static int safe_free_entry(struct safe_softc *sc, struct safe_ringentry *re); +static int safe_kprocess(device_t dev, struct cryptkop *krp, int hint); +static int safe_kstart(struct safe_softc *sc); +static int safe_ksigbits(struct safe_softc *sc, struct crparam *cr); +static void safe_kfeed(struct safe_softc *sc); +static void safe_kpoll(unsigned long arg); +static void safe_kload_reg(struct safe_softc *sc, u_int32_t off, + u_int32_t len, struct crparam *n); + +static int safe_newsession(device_t, u_int32_t *, struct cryptoini *); +static int safe_freesession(device_t, u_int64_t); +static int safe_process(device_t, struct cryptop *, int); + +static device_method_t safe_methods = { + /* crypto device methods */ + DEVMETHOD(cryptodev_newsession, safe_newsession), + DEVMETHOD(cryptodev_freesession,safe_freesession), + DEVMETHOD(cryptodev_process, safe_process), + DEVMETHOD(cryptodev_kprocess, safe_kprocess), +}; + +#define READ_REG(sc,r) readl((sc)->sc_base_addr + (r)) +#define WRITE_REG(sc,r,val) writel((val), (sc)->sc_base_addr + (r)) + +#define SAFE_MAX_CHIPS 8 +static struct safe_softc *safe_chip_idx[SAFE_MAX_CHIPS]; + +/* + * split our buffers up into safe DMAable byte fragments to avoid lockup + * bug in 1141 HW on rev 1.0. + */ + +static int +pci_map_linear( + struct safe_softc *sc, + struct safe_operand *buf, + void *addr, + int len) +{ + dma_addr_t tmp; + int chunk, tlen = len; + + tmp = pci_map_single(sc->sc_pcidev, addr, len, PCI_DMA_BIDIRECTIONAL); + + buf->mapsize += len; + while (len > 0) { + chunk = (len > sc->sc_max_dsize) ? sc->sc_max_dsize : len; + buf->segs[buf->nsegs].ds_addr = tmp; + buf->segs[buf->nsegs].ds_len = chunk; + buf->segs[buf->nsegs].ds_tlen = tlen; + buf->nsegs++; + tmp += chunk; + len -= chunk; + tlen = 0; + } + return 0; +} + +/* + * map in a given uio buffer (great on some arches :-) + */ + +static int +pci_map_uio(struct safe_softc *sc, struct safe_operand *buf, struct uio *uio) +{ + struct iovec *iov = uio->uio_iov; + int n; + + DPRINTF(("%s()\n", __FUNCTION__)); + + buf->mapsize = 0; + buf->nsegs = 0; + + for (n = 0; n < uio->uio_iovcnt; n++) { + pci_map_linear(sc, buf, iov->iov_base, iov->iov_len); + iov++; + } + + /* identify this buffer by the first segment */ + buf->map = (void *) buf->segs[0].ds_addr; + return(0); +} + +/* + * map in a given sk_buff + */ + +static int +pci_map_skb(struct safe_softc *sc,struct safe_operand *buf,struct sk_buff *skb) +{ + int i; + + DPRINTF(("%s()\n", __FUNCTION__)); + + buf->mapsize = 0; + buf->nsegs = 0; + + pci_map_linear(sc, buf, skb->data, skb_headlen(skb)); + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + pci_map_linear(sc, buf, + page_address(skb_shinfo(skb)->frags[i].page) + + skb_shinfo(skb)->frags[i].page_offset, + skb_shinfo(skb)->frags[i].size); + } + + /* identify this buffer by the first segment */ + buf->map = (void *) buf->segs[0].ds_addr; + return(0); +} + + +#if 0 /* not needed at this time */ +static void +pci_sync_operand(struct safe_softc *sc, struct safe_operand *buf) +{ + int i; + + DPRINTF(("%s()\n", __FUNCTION__)); + for (i = 0; i < buf->nsegs; i++) + pci_dma_sync_single_for_cpu(sc->sc_pcidev, buf->segs[i].ds_addr, + buf->segs[i].ds_len, PCI_DMA_BIDIRECTIONAL); +} +#endif + +static void +pci_unmap_operand(struct safe_softc *sc, struct safe_operand *buf) +{ + int i; + DPRINTF(("%s()\n", __FUNCTION__)); + for (i = 0; i < buf->nsegs; i++) { + if (buf->segs[i].ds_tlen) { + DPRINTF(("%s - unmap %d 0x%x %d\n", __FUNCTION__, i, buf->segs[i].ds_addr, buf->segs[i].ds_tlen)); + pci_unmap_single(sc->sc_pcidev, buf->segs[i].ds_addr, + buf->segs[i].ds_tlen, PCI_DMA_BIDIRECTIONAL); + DPRINTF(("%s - unmap %d 0x%x %d done\n", __FUNCTION__, i, buf->segs[i].ds_addr, buf->segs[i].ds_tlen)); + } + buf->segs[i].ds_addr = 0; + buf->segs[i].ds_len = 0; + buf->segs[i].ds_tlen = 0; + } + buf->nsegs = 0; + buf->mapsize = 0; + buf->map = 0; +} + + +/* + * SafeXcel Interrupt routine + */ +static irqreturn_t +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) +safe_intr(int irq, void *arg) +#else +safe_intr(int irq, void *arg, struct pt_regs *regs) +#endif +{ + struct safe_softc *sc = arg; + int stat; + unsigned long flags; + + stat = READ_REG(sc, SAFE_HM_STAT); + + DPRINTF(("%s(stat=0x%x)\n", __FUNCTION__, stat)); + + if (stat == 0) /* shared irq, not for us */ + return IRQ_NONE; + + WRITE_REG(sc, SAFE_HI_CLR, stat); /* IACK */ + + if ((stat & SAFE_INT_PE_DDONE)) { + /* + * Descriptor(s) done; scan the ring and + * process completed operations. + */ + spin_lock_irqsave(&sc->sc_ringmtx, flags); + while (sc->sc_back != sc->sc_front) { + struct safe_ringentry *re = sc->sc_back; + +#ifdef SAFE_DEBUG + if (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. + */ + DPRINTF(("%s re->re_desc.d_csr=0x%x\n", __FUNCTION__, re->re_desc.d_csr)); + if (re->re_desc.d_csr != 0) { + if (!SAFE_PE_CSR_IS_DONE(re->re_desc.d_csr)) { + DPRINTF(("%s !CSR_IS_DONE\n", __FUNCTION__)); + break; + } + if (!SAFE_PE_LEN_IS_DONE(re->re_desc.d_len)) { + DPRINTF(("%s !LEN_IS_DONE\n", __FUNCTION__)); + break; + } + sc->sc_nqchip--; + safe_callback(sc, re); + } + if (++(sc->sc_back) == sc->sc_ringtop) + sc->sc_back = sc->sc_ring; + } + spin_unlock_irqrestore(&sc->sc_ringmtx, flags); + } + + /* + * Check to see if we got any DMA Error + */ + if (stat & SAFE_INT_PE_ERROR) { + printk("%s: dmaerr dmastat %08x\n", device_get_nameunit(sc->sc_dev), + (int)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); + } + + return IRQ_HANDLED; +} + +/* + * safe_feed() - post a request to chip + */ +static void +safe_feed(struct safe_softc *sc, struct safe_ringentry *re) +{ + DPRINTF(("%s()\n", __FUNCTION__)); +#ifdef SAFE_DEBUG + if (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, caddr_t key) +{ + int i; + + bcopy(key, ses->ses_key, ses->ses_klen / 8); + + /* 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, caddr_t key, int klen) +{ +#ifdef HMAC_HACK + MD5_CTX md5ctx; + SHA1_CTX sha1ctx; + int i; + + + for (i = 0; i < klen; i++) + key[i] ^= HMAC_IPAD_VAL; + + if (algo == CRYPTO_MD5_HMAC) { + MD5Init(&md5ctx); + MD5Update(&md5ctx, key, klen); + MD5Update(&md5ctx, hmac_ipad_buffer, MD5_HMAC_BLOCK_LEN - klen); + bcopy(md5ctx.md5_st8, ses->ses_hminner, sizeof(md5ctx.md5_st8)); + } else { + SHA1Init(&sha1ctx); + SHA1Update(&sha1ctx, key, klen); + SHA1Update(&sha1ctx, hmac_ipad_buffer, + SHA1_HMAC_BLOCK_LEN - klen); + bcopy(sha1ctx.h.b32, ses->ses_hminner, sizeof(sha1ctx.h.b32)); + } + + for (i = 0; i < klen; i++) + key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL); + + if (algo == CRYPTO_MD5_HMAC) { + MD5Init(&md5ctx); + MD5Update(&md5ctx, key, klen); + MD5Update(&md5ctx, hmac_opad_buffer, MD5_HMAC_BLOCK_LEN - klen); + bcopy(md5ctx.md5_st8, ses->ses_hmouter, sizeof(md5ctx.md5_st8)); + } else { + SHA1Init(&sha1ctx); + SHA1Update(&sha1ctx, key, klen); + SHA1Update(&sha1ctx, hmac_opad_buffer, + SHA1_HMAC_BLOCK_LEN - klen); + bcopy(sha1ctx.h.b32, ses->ses_hmouter, sizeof(sha1ctx.h.b32)); + } + + for (i = 0; i < klen; i++) + key[i] ^= HMAC_OPAD_VAL; + +#if 0 + /* + * this code prevents SHA working on a BE host, + * so it is obviously wrong. I think the byte + * swap setup we do with the chip fixes this for us + */ + + /* 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]); + } +#endif +#else /* HMAC_HACK */ + printk("safe: md5/sha not implemented\n"); +#endif /* HMAC_HACK */ +} +#undef N + +/* + * Allocate a new 'session' and return an encoded session id. 'sidp' + * contains our registration id, and should contain an encoded session + * id on successful allocation. + */ +static int +safe_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri) +{ + struct safe_softc *sc = device_get_softc(dev); + struct cryptoini *c, *encini = NULL, *macini = NULL; + struct safe_session *ses = NULL; + int sesn; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (sidp == NULL || cri == NULL || sc == NULL) + return (EINVAL); + + for (c = cri; c != NULL; c = c->cri_next) { + if (c->cri_alg == CRYPTO_MD5_HMAC || + c->cri_alg == CRYPTO_SHA1_HMAC || + c->cri_alg == CRYPTO_NULL_HMAC) { + if (macini) + return (EINVAL); + macini = c; + } else if (c->cri_alg == CRYPTO_DES_CBC || + c->cri_alg == CRYPTO_3DES_CBC || + c->cri_alg == CRYPTO_AES_CBC || + c->cri_alg == CRYPTO_NULL_CBC) { + if (encini) + return (EINVAL); + encini = c; + } else + return (EINVAL); + } + if (encini == NULL && macini == NULL) + return (EINVAL); + if (encini) { /* validate key length */ + switch (encini->cri_alg) { + case CRYPTO_DES_CBC: + if (encini->cri_klen != 64) + return (EINVAL); + break; + case CRYPTO_3DES_CBC: + if (encini->cri_klen != 192) + return (EINVAL); + break; + case CRYPTO_AES_CBC: + if (encini->cri_klen != 128 && + encini->cri_klen != 192 && + encini->cri_klen != 256) + return (EINVAL); + break; + } + } + + if (sc->sc_sessions == NULL) { + ses = sc->sc_sessions = (struct safe_session *) + kmalloc(sizeof(struct safe_session), SLAB_ATOMIC); + if (ses == NULL) + return (ENOMEM); + memset(ses, 0, sizeof(struct safe_session)); + sesn = 0; + sc->sc_nsessions = 1; + } else { + for (sesn = 0; sesn < sc->sc_nsessions; sesn++) { + if (sc->sc_sessions[sesn].ses_used == 0) { + ses = &sc->sc_sessions[sesn]; + break; + } + } + + if (ses == NULL) { + sesn = sc->sc_nsessions; + ses = (struct safe_session *) + kmalloc((sesn + 1) * sizeof(struct safe_session), SLAB_ATOMIC); + if (ses == NULL) + return (ENOMEM); + memset(ses, 0, (sesn + 1) * sizeof(struct safe_session)); + bcopy(sc->sc_sessions, ses, sesn * + sizeof(struct safe_session)); + bzero(sc->sc_sessions, sesn * + sizeof(struct safe_session)); + kfree(sc->sc_sessions); + sc->sc_sessions = ses; + ses = &sc->sc_sessions[sesn]; + sc->sc_nsessions++; + } + } + + bzero(ses, sizeof(struct safe_session)); + ses->ses_used = 1; + + if (encini) { + /* get an IV */ + /* XXX may read fewer than requested */ + read_random(ses->ses_iv, sizeof(ses->ses_iv)); + + ses->ses_klen = encini->cri_klen; + if (encini->cri_key != NULL) + safe_setup_enckey(ses, encini->cri_key); + } + + if (macini) { + ses->ses_mlen = macini->cri_mlen; + if (ses->ses_mlen == 0) { + if (macini->cri_alg == CRYPTO_MD5_HMAC) + ses->ses_mlen = MD5_HASH_LEN; + else + ses->ses_mlen = SHA1_HASH_LEN; + } + + if (macini->cri_key != NULL) { + safe_setup_mackey(ses, macini->cri_alg, macini->cri_key, + macini->cri_klen / 8); + } + } + + *sidp = SAFE_SID(device_get_unit(sc->sc_dev), sesn); + return (0); +} + +/* + * Deallocate a session. + */ +static int +safe_freesession(device_t dev, u_int64_t tid) +{ + struct safe_softc *sc = device_get_softc(dev); + int session, ret; + u_int32_t sid = ((u_int32_t) tid) & 0xffffffff; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (sc == NULL) + return (EINVAL); + + session = SAFE_SESSION(sid); + if (session < sc->sc_nsessions) { + bzero(&sc->sc_sessions[session], sizeof(sc->sc_sessions[session])); + ret = 0; + } else + ret = EINVAL; + return (ret); +} + + +static int +safe_process(device_t dev, struct cryptop *crp, int hint) +{ + struct safe_softc *sc = device_get_softc(dev); + int err = 0, i, nicealign, uniform; + struct cryptodesc *crd1, *crd2, *maccrd, *enccrd; + int bypass, oplen, ivsize; + caddr_t iv; + 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; + unsigned long flags; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (crp == NULL || crp->crp_callback == NULL || sc == NULL) { + safestats.st_invalid++; + return (EINVAL); + } + if (SAFE_SESSION(crp->crp_sid) >= sc->sc_nsessions) { + safestats.st_badsession++; + return (EINVAL); + } + + spin_lock_irqsave(&sc->sc_ringmtx, flags); + if (sc->sc_front == sc->sc_back && sc->sc_nqchip != 0) { + safestats.st_ringfull++; + sc->sc_needwakeup |= CRYPTO_SYMQ; + spin_unlock_irqrestore(&sc->sc_ringmtx, flags); + 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; + re->re_sesn = SAFE_SESSION(crp->crp_sid); + + re->re_src.nsegs = 0; + re->re_dst.nsegs = 0; + + if (crp->crp_flags & CRYPTO_F_SKBUF) { + re->re_src_skb = (struct sk_buff *)crp->crp_buf; + re->re_dst_skb = (struct sk_buff *)crp->crp_buf; + } else if (crp->crp_flags & CRYPTO_F_IOV) { + re->re_src_io = (struct uio *)crp->crp_buf; + re->re_dst_io = (struct uio *)crp->crp_buf; + } else { + safestats.st_badflags++; + err = EINVAL; + goto errout; /* XXX we don't handle contiguous blocks! */ + } + + sa = &re->re_sa; + ses = &sc->sc_sessions[re->re_sesn]; + + crd1 = crp->crp_desc; + if (crd1 == NULL) { + safestats.st_nodesc++; + err = EINVAL; + goto errout; + } + crd2 = crd1->crd_next; + + cmd0 = SAFE_SA_CMD0_BASIC; /* basic group operation */ + cmd1 = 0; + if (crd2 == NULL) { + if (crd1->crd_alg == CRYPTO_MD5_HMAC || + crd1->crd_alg == CRYPTO_SHA1_HMAC || + crd1->crd_alg == CRYPTO_NULL_HMAC) { + maccrd = crd1; + enccrd = NULL; + cmd0 |= SAFE_SA_CMD0_OP_HASH; + } else if (crd1->crd_alg == CRYPTO_DES_CBC || + crd1->crd_alg == CRYPTO_3DES_CBC || + crd1->crd_alg == CRYPTO_AES_CBC || + crd1->crd_alg == CRYPTO_NULL_CBC) { + maccrd = NULL; + enccrd = crd1; + cmd0 |= SAFE_SA_CMD0_OP_CRYPT; + } else { + safestats.st_badalg++; + err = EINVAL; + goto errout; + } + } else { + if ((crd1->crd_alg == CRYPTO_MD5_HMAC || + crd1->crd_alg == CRYPTO_SHA1_HMAC || + crd1->crd_alg == CRYPTO_NULL_HMAC) && + (crd2->crd_alg == CRYPTO_DES_CBC || + crd2->crd_alg == CRYPTO_3DES_CBC || + crd2->crd_alg == CRYPTO_AES_CBC || + crd2->crd_alg == CRYPTO_NULL_CBC) && + ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) { + maccrd = crd1; + enccrd = crd2; + } else if ((crd1->crd_alg == CRYPTO_DES_CBC || + crd1->crd_alg == CRYPTO_3DES_CBC || + crd1->crd_alg == CRYPTO_AES_CBC || + crd1->crd_alg == CRYPTO_NULL_CBC) && + (crd2->crd_alg == CRYPTO_MD5_HMAC || + crd2->crd_alg == CRYPTO_SHA1_HMAC || + crd2->crd_alg == CRYPTO_NULL_HMAC) && + (crd1->crd_flags & CRD_F_ENCRYPT)) { + enccrd = crd1; + maccrd = crd2; + } else { + safestats.st_badalg++; + err = EINVAL; + goto errout; + } + cmd0 |= SAFE_SA_CMD0_OP_BOTH; + } + + if (enccrd) { + if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT) + safe_setup_enckey(ses, enccrd->crd_key); + + if (enccrd->crd_alg == CRYPTO_DES_CBC) { + cmd0 |= SAFE_SA_CMD0_DES; + cmd1 |= SAFE_SA_CMD1_CBC; + ivsize = 2*sizeof(u_int32_t); + } else if (enccrd->crd_alg == CRYPTO_3DES_CBC) { + cmd0 |= SAFE_SA_CMD0_3DES; + cmd1 |= SAFE_SA_CMD1_CBC; + ivsize = 2*sizeof(u_int32_t); + } else if (enccrd->crd_alg == CRYPTO_AES_CBC) { + cmd0 |= SAFE_SA_CMD0_AES; + cmd1 |= SAFE_SA_CMD1_CBC; + if (ses->ses_klen == 128) + cmd1 |= SAFE_SA_CMD1_AES128; + else if (ses->ses_klen == 192) + cmd1 |= SAFE_SA_CMD1_AES192; + else + cmd1 |= SAFE_SA_CMD1_AES256; + ivsize = 4*sizeof(u_int32_t); + } else { + cmd0 |= SAFE_SA_CMD0_CRYPT_NULL; + ivsize = 0; + } + + /* + * 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. + */ + if (enccrd->crd_flags & CRD_F_ENCRYPT) { + cmd0 |= SAFE_SA_CMD0_OUTBOUND; + + if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) + iv = enccrd->crd_iv; + else + iv = (caddr_t) ses->ses_iv; + if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) { + crypto_copyback(crp->crp_flags, crp->crp_buf, + enccrd->crd_inject, ivsize, iv); + } + bcopy(iv, re->re_sastate.sa_saved_iv, ivsize); + /* make iv LE */ + for (i = 0; i < ivsize/sizeof(re->re_sastate.sa_saved_iv[0]); i++) + re->re_sastate.sa_saved_iv[i] = + cpu_to_le32(re->re_sastate.sa_saved_iv[i]); + cmd0 |= SAFE_SA_CMD0_IVLD_STATE | SAFE_SA_CMD0_SAVEIV; + re->re_flags |= SAFE_QFLAGS_COPYOUTIV; + } else { + cmd0 |= SAFE_SA_CMD0_INBOUND; + + if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) { + bcopy(enccrd->crd_iv, + re->re_sastate.sa_saved_iv, ivsize); + } else { + crypto_copydata(crp->crp_flags, crp->crp_buf, + enccrd->crd_inject, ivsize, + (caddr_t)re->re_sastate.sa_saved_iv); + } + /* make iv LE */ + for (i = 0; i < ivsize/sizeof(re->re_sastate.sa_saved_iv[0]); i++) + re->re_sastate.sa_saved_iv[i] = + cpu_to_le32(re->re_sastate.sa_saved_iv[i]); + cmd0 |= SAFE_SA_CMD0_IVLD_STATE; + } + /* + * 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 (maccrd) { + if (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) { + safe_setup_mackey(ses, maccrd->crd_alg, + maccrd->crd_key, maccrd->crd_klen / 8); + } + + if (maccrd->crd_alg == CRYPTO_MD5_HMAC) { + cmd0 |= SAFE_SA_CMD0_MD5; + cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */ + } else if (maccrd->crd_alg == CRYPTO_SHA1_HMAC) { + cmd0 |= SAFE_SA_CMD0_SHA1; + cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */ + } else { + cmd0 |= SAFE_SA_CMD0_HASH_NULL; + } + /* + * 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 (enccrd && maccrd) { + /* + * The offset from hash data to the start of + * crypt data is the difference in the skips. + */ + bypass = maccrd->crd_skip; + coffset = enccrd->crd_skip - maccrd->crd_skip; + if (coffset < 0) { + DPRINTF(("%s: hash does not precede crypt; " + "mac skip %u enc skip %u\n", + __func__, maccrd->crd_skip, enccrd->crd_skip)); + safestats.st_skipmismatch++; + err = EINVAL; + goto errout; + } + oplen = enccrd->crd_skip + enccrd->crd_len; + if (maccrd->crd_skip + maccrd->crd_len != oplen) { + DPRINTF(("%s: hash amount %u != crypt amount %u\n", + __func__, maccrd->crd_skip + maccrd->crd_len, + oplen)); + safestats.st_lenmismatch++; + err = EINVAL; + goto errout; + } +#ifdef SAFE_DEBUG + if (debug) { + printf("mac: skip %d, len %d, inject %d\n", + maccrd->crd_skip, maccrd->crd_len, + maccrd->crd_inject); + printf("enc: skip %d, len %d, inject %d\n", + enccrd->crd_skip, enccrd->crd_len, + enccrd->crd_inject); + 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 { + if (enccrd) { + bypass = enccrd->crd_skip; + oplen = bypass + enccrd->crd_len; + } else { + bypass = maccrd->crd_skip; + oplen = bypass + maccrd->crd_len; + } + 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 (crp->crp_flags & CRYPTO_F_SKBUF) { + if (pci_map_skb(sc, &re->re_src, re->re_src_skb)) { + safestats.st_noload++; + err = ENOMEM; + goto errout; + } + } else if (crp->crp_flags & CRYPTO_F_IOV) { + if (pci_map_uio(sc, &re->re_src, re->re_src_io)) { + safestats.st_noload++; + err = ENOMEM; + goto errout; + } + } + nicealign = safe_dmamap_aligned(sc, &re->re_src); + uniform = safe_dmamap_uniform(sc, &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 (enccrd == NULL && maccrd != NULL) { + /* + * Hash op; no destination needed. + */ + } else { + if (crp->crp_flags & (CRYPTO_F_IOV|CRYPTO_F_SKBUF)) { + if (!nicealign) { + safestats.st_iovmisaligned++; + err = EINVAL; + goto errout; + } + if (uniform != 1) { + device_printf(sc->sc_dev, "!uniform source\n"); + if (!uniform) { + /* + * 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; + } + } else + re->re_dst = re->re_src; + } else { + safestats.st_badflags++; + 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 (maccrd) + re->re_desc.d_csr |= SAFE_PE_CSR_LOADSA | SAFE_PE_CSR_HASHFINAL; + wmb(); + 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); + spin_unlock_irqrestore(&sc->sc_ringmtx, flags); + return (0); + +errout: + if (re->re_src.map != re->re_dst.map) + pci_unmap_operand(sc, &re->re_dst); + if (re->re_src.map) + pci_unmap_operand(sc, &re->re_src); + spin_unlock_irqrestore(&sc->sc_ringmtx, flags); + if (err != ERESTART) { + crp->crp_etype = err; + crypto_done(crp); + } else { + sc->sc_needwakeup |= CRYPTO_SYMQ; + } + return (err); +} + +static void +safe_callback(struct safe_softc *sc, struct safe_ringentry *re) +{ + struct cryptop *crp = (struct cryptop *)re->re_crp; + struct cryptodesc *crd; + + DPRINTF(("%s()\n", __FUNCTION__)); + + safestats.st_opackets++; + safestats.st_obytes += re->re_dst.mapsize; + + 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? */ + } + + if (re->re_dst.map != NULL && re->re_dst.map != re->re_src.map) + pci_unmap_operand(sc, &re->re_dst); + pci_unmap_operand(sc, &re->re_src); + + /* + * If result was written to a differet mbuf chain, swap + * it in as the return value and reclaim the original. + */ + if ((crp->crp_flags & CRYPTO_F_SKBUF) && re->re_src_skb != re->re_dst_skb) { + device_printf(sc->sc_dev, "no CRYPTO_F_SKBUF swapping support\n"); + /* kfree_skb(skb) */ + /* crp->crp_buf = (caddr_t)re->re_dst_skb */ + return; + } + + if (re->re_flags & SAFE_QFLAGS_COPYOUTIV) { + /* copy out IV for future use */ + for (crd = crp->crp_desc; crd; crd = crd->crd_next) { + int i; + int ivsize; + + if (crd->crd_alg == CRYPTO_DES_CBC || + crd->crd_alg == CRYPTO_3DES_CBC) { + ivsize = 2*sizeof(u_int32_t); + } else if (crd->crd_alg == CRYPTO_AES_CBC) { + ivsize = 4*sizeof(u_int32_t); + } else + continue; + crypto_copydata(crp->crp_flags, crp->crp_buf, + crd->crd_skip + crd->crd_len - ivsize, ivsize, + (caddr_t)sc->sc_sessions[re->re_sesn].ses_iv); + for (i = 0; + i < ivsize/sizeof(sc->sc_sessions[re->re_sesn].ses_iv[0]); + i++) + sc->sc_sessions[re->re_sesn].ses_iv[i] = + cpu_to_le32(sc->sc_sessions[re->re_sesn].ses_iv[i]); + break; + } + } + + if (re->re_flags & SAFE_QFLAGS_COPYOUTICV) { + /* copy out ICV result */ + for (crd = crp->crp_desc; crd; crd = crd->crd_next) { + if (!(crd->crd_alg == CRYPTO_MD5_HMAC || + crd->crd_alg == CRYPTO_SHA1_HMAC || + crd->crd_alg == CRYPTO_NULL_HMAC)) + continue; + if (crd->crd_alg == CRYPTO_SHA1_HMAC) { + /* + * SHA-1 ICV's are byte-swapped; fix 'em up + * before copy them to their destination. + */ + re->re_sastate.sa_saved_indigest[0] = + cpu_to_be32(re->re_sastate.sa_saved_indigest[0]); + re->re_sastate.sa_saved_indigest[1] = + cpu_to_be32(re->re_sastate.sa_saved_indigest[1]); + re->re_sastate.sa_saved_indigest[2] = + cpu_to_be32(re->re_sastate.sa_saved_indigest[2]); + } else { + re->re_sastate.sa_saved_indigest[0] = + cpu_to_le32(re->re_sastate.sa_saved_indigest[0]); + re->re_sastate.sa_saved_indigest[1] = + cpu_to_le32(re->re_sastate.sa_saved_indigest[1]); + re->re_sastate.sa_saved_indigest[2] = + cpu_to_le32(re->re_sastate.sa_saved_indigest[2]); + } + crypto_copyback(crp->crp_flags, crp->crp_buf, + crd->crd_inject, + sc->sc_sessions[re->re_sesn].ses_mlen, + (caddr_t)re->re_sastate.sa_saved_indigest); + break; + } + } + crypto_done(crp); +} + + +#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG) +#define SAFE_RNG_MAXWAIT 1000 + +static void +safe_rng_init(struct safe_softc *sc) +{ + u_int32_t w, v; + int i; + + DPRINTF(("%s()\n", __FUNCTION__)); + + 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) +{ + DPRINTF(("%s()\n", __FUNCTION__)); + + 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) +{ + DPRINTF(("%s()\n", __FUNCTION__)); + + 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 int +safe_read_random(void *arg, u_int32_t *buf, int maxwords) +{ + struct safe_softc *sc = (struct safe_softc *) arg; + int i, rc; + + DPRINTF(("%s()\n", __FUNCTION__)); + + safestats.st_rng++; + /* + * Fetch the next block of data. + */ + if (maxwords > safe_rngbufsize) + maxwords = safe_rngbufsize; + if (maxwords > SAFE_RNG_MAXBUFSIZ) + maxwords = SAFE_RNG_MAXBUFSIZ; +retry: + /* read as much as we can */ + for (rc = 0; rc < maxwords; rc++) { + if (READ_REG(sc, SAFE_RNG_STAT) != 0) + break; + buf[rc] = READ_REG(sc, SAFE_RNG_OUT); + } + if (rc == 0) + return 0; + /* + * 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__, + (unsigned)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); + + return(rc); +} +#endif /* defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG) */ + + +/* + * 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. + */ + DPRINTF(("%s()\n", __FUNCTION__)); + + 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; + + DPRINTF(("%s()\n", __FUNCTION__)); + + v = READ_REG(sc, SAFE_PE_DMACFG); + v &=~ ( SAFE_PE_DMACFG_PEMODE + | 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_ESPDESC /* endian-swap part. desc's */ + | SAFE_PE_DMACFG_ESSA /* endian-swap SA's */ + | SAFE_PE_DMACFG_ESPACKET /* swap the packet data */ + ); + 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_ESPDESC /* endian-swap part. desc's */ + | SAFE_PE_DMACFG_ESSA /* endian-swap SA's */ +#if 0 + | SAFE_PE_DMACFG_ESPACKET /* swap the packet data */ +#endif + ; + WRITE_REG(sc, SAFE_PE_DMACFG, v); + +#ifdef __BIG_ENDIAN + /* tell the safenet that we are 4321 and not 1234 */ + WRITE_REG(sc, SAFE_ENDIAN, 0xe4e41b1b); +#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", + (unsigned) ((READ_REG(sc, SAFE_DMA_CFG)>>2) & 0xff), + (unsigned) SAFE_REV_MAJ(sc->sc_chiprev), + (unsigned) SAFE_REV_MIN(sc->sc_chiprev)); + sc->sc_max_dsize = 256; + } else { + sc->sc_max_dsize = SAFE_MAX_DSIZE; + } + + /* 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, sc->sc_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_CLR, 0xffffffff); + WRITE_REG(sc, SAFE_HI_DESC_CNT, 1); + WRITE_REG(sc, SAFE_HI_MASK, SAFE_INT_PE_DDONE | SAFE_INT_PE_ERROR); +} + + +/* + * Clean up after a chip crash. + * It is assumed that the caller in splimp() + */ +static void +safe_cleanchip(struct safe_softc *sc) +{ + DPRINTF(("%s()\n", __FUNCTION__)); + + 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; + + DPRINTF(("%s()\n", __FUNCTION__)); + + /* + * Free header MCR + */ + if ((re->re_dst_skb != NULL) && (re->re_src_skb != re->re_dst_skb)) +#ifdef NOTYET + m_freem(re->re_dst_m); +#else + printk("%s,%d: SKB not supported\n", __FILE__, __LINE__); +#endif + + 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) +{ + DPRINTF(("%s()\n", __FUNCTION__)); + + 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(struct safe_softc *sc, const struct safe_operand *op) +{ + int i; + + DPRINTF(("%s()\n", __FUNCTION__)); + + 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(struct safe_softc *sc, const struct safe_operand *op) +{ + int result = 1; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (op->nsegs > 0) { + int i; + + for (i = 0; i < op->nsegs-1; i++) { + if (op->segs[i].ds_len % sc->sc_max_dsize) + return (0); + if (op->segs[i].ds_len != sc->sc_max_dsize) + result = 2; + } + } + return (result); +} + +static int +safe_kprocess(device_t dev, struct cryptkop *krp, int hint) +{ + struct safe_softc *sc = device_get_softc(dev); + struct safe_pkq *q; + unsigned long flags; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (sc == NULL) { + krp->krp_status = EINVAL; + goto err; + } + + if (krp->krp_op != CRK_MOD_EXP) { + krp->krp_status = EOPNOTSUPP; + goto err; + } + + q = (struct safe_pkq *) kmalloc(sizeof(*q), GFP_KERNEL); + if (q == NULL) { + krp->krp_status = ENOMEM; + goto err; + } + memset(q, 0, sizeof(*q)); + q->pkq_krp = krp; + INIT_LIST_HEAD(&q->pkq_list); + + spin_lock_irqsave(&sc->sc_pkmtx, flags); + list_add_tail(&q->pkq_list, &sc->sc_pkq); + safe_kfeed(sc); + spin_unlock_irqrestore(&sc->sc_pkmtx, flags); + return (0); + +err: + crypto_kdone(krp); + return (0); +} + +#define SAFE_CRK_PARAM_BASE 0 +#define SAFE_CRK_PARAM_EXP 1 +#define SAFE_CRK_PARAM_MOD 2 + +static int +safe_kstart(struct safe_softc *sc) +{ + struct cryptkop *krp = sc->sc_pkq_cur->pkq_krp; + int exp_bits, mod_bits, base_bits; + u_int32_t op, a_off, b_off, c_off, d_off; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (krp->krp_iparams < 3 || krp->krp_oparams != 1) { + krp->krp_status = EINVAL; + return (1); + } + + base_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_BASE]); + if (base_bits > 2048) + goto too_big; + if (base_bits <= 0) /* 5. base not zero */ + goto too_small; + + exp_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_EXP]); + if (exp_bits > 2048) + goto too_big; + if (exp_bits <= 0) /* 1. exponent word length > 0 */ + goto too_small; /* 4. exponent not zero */ + + mod_bits = safe_ksigbits(sc, &krp->krp_param[SAFE_CRK_PARAM_MOD]); + if (mod_bits > 2048) + goto too_big; + if (mod_bits <= 32) /* 2. modulus word length > 1 */ + goto too_small; /* 8. MSW of modulus != zero */ + if (mod_bits < exp_bits) /* 3 modulus len >= exponent len */ + goto too_small; + if ((krp->krp_param[SAFE_CRK_PARAM_MOD].crp_p[0] & 1) == 0) + goto bad_domain; /* 6. modulus is odd */ + if (mod_bits > krp->krp_param[krp->krp_iparams].crp_nbits) + goto too_small; /* make sure result will fit */ + + /* 7. modulus > base */ + if (mod_bits < base_bits) + goto too_small; + if (mod_bits == base_bits) { + u_int8_t *basep, *modp; + int i; + + basep = krp->krp_param[SAFE_CRK_PARAM_BASE].crp_p + + ((base_bits + 7) / 8) - 1; + modp = krp->krp_param[SAFE_CRK_PARAM_MOD].crp_p + + ((mod_bits + 7) / 8) - 1; + + for (i = 0; i < (mod_bits + 7) / 8; i++, basep--, modp--) { + if (*modp < *basep) + goto too_small; + if (*modp > *basep) + break; + } + } + + /* And on the 9th step, he rested. */ + + WRITE_REG(sc, SAFE_PK_A_LEN, (exp_bits + 31) / 32); + WRITE_REG(sc, SAFE_PK_B_LEN, (mod_bits + 31) / 32); + if (mod_bits > 1024) { + op = SAFE_PK_FUNC_EXP4; + a_off = 0x000; + b_off = 0x100; + c_off = 0x200; + d_off = 0x300; + } else { + op = SAFE_PK_FUNC_EXP16; + a_off = 0x000; + b_off = 0x080; + c_off = 0x100; + d_off = 0x180; + } + sc->sc_pk_reslen = b_off - a_off; + sc->sc_pk_resoff = d_off; + + /* A is exponent, B is modulus, C is base, D is result */ + safe_kload_reg(sc, a_off, b_off - a_off, + &krp->krp_param[SAFE_CRK_PARAM_EXP]); + WRITE_REG(sc, SAFE_PK_A_ADDR, a_off >> 2); + safe_kload_reg(sc, b_off, b_off - a_off, + &krp->krp_param[SAFE_CRK_PARAM_MOD]); + WRITE_REG(sc, SAFE_PK_B_ADDR, b_off >> 2); + safe_kload_reg(sc, c_off, b_off - a_off, + &krp->krp_param[SAFE_CRK_PARAM_BASE]); + WRITE_REG(sc, SAFE_PK_C_ADDR, c_off >> 2); + WRITE_REG(sc, SAFE_PK_D_ADDR, d_off >> 2); + + WRITE_REG(sc, SAFE_PK_FUNC, op | SAFE_PK_FUNC_RUN); + + return (0); + +too_big: + krp->krp_status = E2BIG; + return (1); +too_small: + krp->krp_status = ERANGE; + return (1); +bad_domain: + krp->krp_status = EDOM; + return (1); +} + +static int +safe_ksigbits(struct safe_softc *sc, struct crparam *cr) +{ + u_int plen = (cr->crp_nbits + 7) / 8; + int i, sig = plen * 8; + u_int8_t c, *p = cr->crp_p; + + DPRINTF(("%s()\n", __FUNCTION__)); + + for (i = plen - 1; i >= 0; i--) { + c = p[i]; + if (c != 0) { + while ((c & 0x80) == 0) { + sig--; + c <<= 1; + } + break; + } + sig -= 8; + } + return (sig); +} + +static void +safe_kfeed(struct safe_softc *sc) +{ + struct safe_pkq *q, *tmp; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (list_empty(&sc->sc_pkq) && sc->sc_pkq_cur == NULL) + return; + if (sc->sc_pkq_cur != NULL) + return; + list_for_each_entry_safe(q, tmp, &sc->sc_pkq, pkq_list) { + sc->sc_pkq_cur = q; + list_del(&q->pkq_list); + if (safe_kstart(sc) != 0) { + crypto_kdone(q->pkq_krp); + kfree(q); + sc->sc_pkq_cur = NULL; + } else { + /* op started, start polling */ + mod_timer(&sc->sc_pkto, jiffies + 1); + break; + } + } +} + +static void +safe_kpoll(unsigned long arg) +{ + struct safe_softc *sc = NULL; + struct safe_pkq *q; + struct crparam *res; + int i; + u_int32_t buf[64]; + unsigned long flags; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (arg >= SAFE_MAX_CHIPS) + return; + sc = safe_chip_idx[arg]; + if (!sc) { + DPRINTF(("%s() - bad callback\n", __FUNCTION__)); + return; + } + + spin_lock_irqsave(&sc->sc_pkmtx, flags); + if (sc->sc_pkq_cur == NULL) + goto out; + if (READ_REG(sc, SAFE_PK_FUNC) & SAFE_PK_FUNC_RUN) { + /* still running, check back later */ + mod_timer(&sc->sc_pkto, jiffies + 1); + goto out; + } + + q = sc->sc_pkq_cur; + res = &q->pkq_krp->krp_param[q->pkq_krp->krp_iparams]; + bzero(buf, sizeof(buf)); + bzero(res->crp_p, (res->crp_nbits + 7) / 8); + for (i = 0; i < sc->sc_pk_reslen >> 2; i++) + buf[i] = le32_to_cpu(READ_REG(sc, SAFE_PK_RAM_START + + sc->sc_pk_resoff + (i << 2))); + bcopy(buf, res->crp_p, (res->crp_nbits + 7) / 8); + /* + * reduce the bits that need copying if possible + */ + res->crp_nbits = min(res->crp_nbits,sc->sc_pk_reslen * 8); + res->crp_nbits = safe_ksigbits(sc, res); + + for (i = SAFE_PK_RAM_START; i < SAFE_PK_RAM_END; i += 4) + WRITE_REG(sc, i, 0); + + crypto_kdone(q->pkq_krp); + kfree(q); + sc->sc_pkq_cur = NULL; + + safe_kfeed(sc); +out: + spin_unlock_irqrestore(&sc->sc_pkmtx, flags); +} + +static void +safe_kload_reg(struct safe_softc *sc, u_int32_t off, u_int32_t len, + struct crparam *n) +{ + u_int32_t buf[64], i; + + DPRINTF(("%s()\n", __FUNCTION__)); + + bzero(buf, sizeof(buf)); + bcopy(n->crp_p, buf, (n->crp_nbits + 7) / 8); + + for (i = 0; i < len >> 2; i++) + WRITE_REG(sc, SAFE_PK_RAM_START + off + (i << 2), + cpu_to_le32(buf[i])); +} + +#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) +{ + unsigned long flags; + + spin_lock_irqsave(&sc->sc_ringmtx, flags); + 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); + } + spin_unlock_irqrestore(&sc->sc_ringmtx, flags); +} +#endif /* SAFE_DEBUG */ + + +static int safe_probe(struct pci_dev *dev, const struct pci_device_id *ent) +{ + struct safe_softc *sc = NULL; + u32 mem_start, mem_len, cmd; + int i, rc, devinfo; + dma_addr_t raddr; + static int num_chips = 0; + + DPRINTF(("%s()\n", __FUNCTION__)); + + if (pci_enable_device(dev) < 0) + return(-ENODEV); + + if (!dev->irq) { + printk("safe: found device with no IRQ assigned. check BIOS settings!"); + pci_disable_device(dev); + return(-ENODEV); + } + + if (pci_set_mwi(dev)) { + printk("safe: pci_set_mwi failed!"); + return(-ENODEV); + } + + sc = (struct safe_softc *) kmalloc(sizeof(*sc), GFP_KERNEL); + if (!sc) + return(-ENOMEM); + memset(sc, 0, sizeof(*sc)); + + softc_device_init(sc, "safe", num_chips, safe_methods); + + sc->sc_irq = -1; + sc->sc_cid = -1; + sc->sc_pcidev = dev; + if (num_chips < SAFE_MAX_CHIPS) { + safe_chip_idx[device_get_unit(sc->sc_dev)] = sc; + num_chips++; + } + + INIT_LIST_HEAD(&sc->sc_pkq); + spin_lock_init(&sc->sc_pkmtx); + + pci_set_drvdata(sc->sc_pcidev, sc); + + /* we read its hardware registers as memory */ + mem_start = pci_resource_start(sc->sc_pcidev, 0); + mem_len = pci_resource_len(sc->sc_pcidev, 0); + + sc->sc_base_addr = (ocf_iomem_t) ioremap(mem_start, mem_len); + if (!sc->sc_base_addr) { + device_printf(sc->sc_dev, "failed to ioremap 0x%x-0x%x\n", + mem_start, mem_start + mem_len - 1); + goto out; + } + + /* fix up the bus size */ + if (pci_set_dma_mask(sc->sc_pcidev, DMA_32BIT_MASK)) { + device_printf(sc->sc_dev, "No usable DMA configuration, aborting.\n"); + goto out; + } + if (pci_set_consistent_dma_mask(sc->sc_pcidev, DMA_32BIT_MASK)) { + device_printf(sc->sc_dev, "No usable consistent DMA configuration, aborting.\n"); + goto out; + } + + pci_set_master(sc->sc_pcidev); + + pci_read_config_dword(sc->sc_pcidev, PCI_COMMAND, &cmd); + + if (!(cmd & PCI_COMMAND_MEMORY)) { + device_printf(sc->sc_dev, "failed to enable memory mapping\n"); + goto out; + } + + if (!(cmd & PCI_COMMAND_MASTER)) { + device_printf(sc->sc_dev, "failed to enable bus mastering\n"); + goto out; + } + + rc = request_irq(dev->irq, safe_intr, IRQF_SHARED, "safe", sc); + if (rc) { + device_printf(sc->sc_dev, "failed to hook irq %d\n", sc->sc_irq); + goto out; + } + sc->sc_irq = dev->irq; + + sc->sc_chiprev = READ_REG(sc, SAFE_DEVINFO) & + (SAFE_DEVINFO_REV_MAJ | SAFE_DEVINFO_REV_MIN); + + /* + * Allocate packet engine descriptors. + */ + sc->sc_ringalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev, + SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry), + &sc->sc_ringalloc.dma_paddr); + if (!sc->sc_ringalloc.dma_vaddr) { + device_printf(sc->sc_dev, "cannot allocate PE descriptor ring\n"); + goto out; + } + + /* + * 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); + } + spin_lock_init(&sc->sc_ringmtx); + + /* + * Allocate scatter and gather particle descriptors. + */ + sc->sc_spalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev, + SAFE_TOTAL_SPART * sizeof (struct safe_pdesc), + &sc->sc_spalloc.dma_paddr); + if (!sc->sc_spalloc.dma_vaddr) { + device_printf(sc->sc_dev, "cannot allocate source particle descriptor ring\n"); + goto out; + } + 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)); + + sc->sc_dpalloc.dma_vaddr = pci_alloc_consistent(sc->sc_pcidev, + SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), + &sc->sc_dpalloc.dma_paddr); + if (!sc->sc_dpalloc.dma_vaddr) { + device_printf(sc->sc_dev, "cannot allocate destination particle descriptor ring\n"); + goto out; + } + 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)); + + sc->sc_cid = crypto_get_driverid(softc_get_device(sc), CRYPTOCAP_F_HARDWARE); + if (sc->sc_cid < 0) { + device_printf(sc->sc_dev, "could not get crypto driver id\n"); + goto out; + } + + printf("%s:", device_get_nameunit(sc->sc_dev)); + + devinfo = READ_REG(sc, SAFE_DEVINFO); + if (devinfo & SAFE_DEVINFO_RNG) { + sc->sc_flags |= SAFE_FLAGS_RNG; + printf(" rng"); + } + if (devinfo & SAFE_DEVINFO_PKEY) { + printf(" key"); + sc->sc_flags |= SAFE_FLAGS_KEY; + crypto_kregister(sc->sc_cid, CRK_MOD_EXP, 0); +#if 0 + crypto_kregister(sc->sc_cid, CRK_MOD_EXP_CRT, 0); +#endif + init_timer(&sc->sc_pkto); + sc->sc_pkto.function = safe_kpoll; + sc->sc_pkto.data = (unsigned long) device_get_unit(sc->sc_dev); + } + if (devinfo & SAFE_DEVINFO_DES) { + printf(" des/3des"); + crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); + } + if (devinfo & SAFE_DEVINFO_AES) { + printf(" aes"); + crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); + } + if (devinfo & SAFE_DEVINFO_MD5) { + printf(" md5"); + crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); + } + if (devinfo & SAFE_DEVINFO_SHA1) { + printf(" sha1"); + crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); + } + printf(" null"); + crypto_register(sc->sc_cid, CRYPTO_NULL_CBC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_NULL_HMAC, 0, 0); + /* XXX other supported algorithms */ + printf("\n"); + + safe_reset_board(sc); /* reset h/w */ + safe_init_board(sc); /* init h/w */ + +#if defined(CONFIG_OCF_RANDOMHARVEST) && !defined(SAFE_NO_RNG) + if (sc->sc_flags & SAFE_FLAGS_RNG) { + safe_rng_init(sc); + crypto_rregister(sc->sc_cid, safe_read_random, sc); + } +#endif /* SAFE_NO_RNG */ + + return (0); + +out: + if (sc->sc_cid >= 0) + crypto_unregister_all(sc->sc_cid); + if (sc->sc_irq != -1) + free_irq(sc->sc_irq, sc); + if (sc->sc_ringalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry), + sc->sc_ringalloc.dma_vaddr, sc->sc_ringalloc.dma_paddr); + if (sc->sc_spalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), + sc->sc_spalloc.dma_vaddr, sc->sc_spalloc.dma_paddr); + if (sc->sc_dpalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), + sc->sc_dpalloc.dma_vaddr, sc->sc_dpalloc.dma_paddr); + kfree(sc); + return(-ENODEV); +} + +static void safe_remove(struct pci_dev *dev) +{ + struct safe_softc *sc = pci_get_drvdata(dev); + + DPRINTF(("%s()\n", __FUNCTION__)); + + /* XXX wait/abort active ops */ + + WRITE_REG(sc, SAFE_HI_MASK, 0); /* disable interrupts */ + + del_timer_sync(&sc->sc_pkto); + + crypto_unregister_all(sc->sc_cid); + + safe_cleanchip(sc); + + if (sc->sc_irq != -1) + free_irq(sc->sc_irq, sc); + if (sc->sc_ringalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry), + sc->sc_ringalloc.dma_vaddr, sc->sc_ringalloc.dma_paddr); + if (sc->sc_spalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), + sc->sc_spalloc.dma_vaddr, sc->sc_spalloc.dma_paddr); + if (sc->sc_dpalloc.dma_vaddr) + pci_free_consistent(sc->sc_pcidev, + SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), + sc->sc_dpalloc.dma_vaddr, sc->sc_dpalloc.dma_paddr); + sc->sc_irq = -1; + sc->sc_ringalloc.dma_vaddr = NULL; + sc->sc_spalloc.dma_vaddr = NULL; + sc->sc_dpalloc.dma_vaddr = NULL; +} + +static struct pci_device_id safe_pci_tbl[] = { + { PCI_VENDOR_SAFENET, PCI_PRODUCT_SAFEXCEL, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, + { }, +}; +MODULE_DEVICE_TABLE(pci, safe_pci_tbl); + +static struct pci_driver safe_driver = { + .name = "safe", + .id_table = safe_pci_tbl, + .probe = safe_probe, + .remove = safe_remove, + /* add PM stuff here one day */ +}; + +static int __init safe_init (void) +{ + struct safe_softc *sc = NULL; + int rc; + + DPRINTF(("%s(%p)\n", __FUNCTION__, safe_init)); + + rc = pci_register_driver(&safe_driver); + pci_register_driver_compat(&safe_driver, rc); + + return rc; +} + +static void __exit safe_exit (void) +{ + pci_unregister_driver(&safe_driver); +} + +module_init(safe_init); +module_exit(safe_exit); + +MODULE_LICENSE("BSD"); +MODULE_AUTHOR("David McCullough <david_mccullough@securecomputing.com>"); +MODULE_DESCRIPTION("OCF driver for safenet PCI crypto devices"); |