diff options
Diffstat (limited to 'target/linux/generic/files/crypto/ocf/talitos/talitos.c')
| -rw-r--r-- | target/linux/generic/files/crypto/ocf/talitos/talitos.c | 1355 |
1 files changed, 1355 insertions, 0 deletions
diff --git a/target/linux/generic/files/crypto/ocf/talitos/talitos.c b/target/linux/generic/files/crypto/ocf/talitos/talitos.c new file mode 100644 index 000000000..c4bc8c0fd --- /dev/null +++ b/target/linux/generic/files/crypto/ocf/talitos/talitos.c @@ -0,0 +1,1355 @@ +/* + * crypto/ocf/talitos/talitos.c + * + * An OCF-Linux module that uses Freescale's SEC to do the crypto. + * Based on crypto/ocf/hifn and crypto/ocf/safe OCF drivers + * + * Copyright (c) 2006 Freescale Semiconductor, Inc. + * + * This code written by Kim A. B. Phillips <kim.phillips@freescale.com> + * some code copied from files with the following: + * Copyright (C) 2004-2007 David McCullough <david_mccullough@mcafee.com> + * + * 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + * + * --------------------------------------------------------------------------- + * + * NOTES: + * + * The Freescale SEC (also known as 'talitos') resides on the + * internal bus, and runs asynchronous to the processor core. It has + * a wide gamut of cryptographic acceleration features, including single- + * pass IPsec (also known as algorithm chaining). To properly utilize + * all of the SEC's performance enhancing features, further reworking + * of higher level code (framework, applications) will be necessary. + * + * The following table shows which SEC version is present in which devices: + * + * Devices SEC version + * + * 8272, 8248 SEC 1.0 + * 885, 875 SEC 1.2 + * 8555E, 8541E SEC 2.0 + * 8349E SEC 2.01 + * 8548E SEC 2.1 + * + * The following table shows the features offered by each SEC version: + * + * Max. chan- + * version Bus I/F Clock nels DEU AESU AFEU MDEU PKEU RNG KEU + * + * SEC 1.0 internal 64b 100MHz 4 1 1 1 1 1 1 0 + * SEC 1.2 internal 32b 66MHz 1 1 1 0 1 0 0 0 + * SEC 2.0 internal 64b 166MHz 4 1 1 1 1 1 1 0 + * SEC 2.01 internal 64b 166MHz 4 1 1 1 1 1 1 0 + * SEC 2.1 internal 64b 333MHz 4 1 1 1 1 1 1 1 + * + * Each execution unit in the SEC has two modes of execution; channel and + * slave/debug. This driver employs the channel infrastructure in the + * device for convenience. Only the RNG is directly accessed due to the + * convenience of its random fifo pool. The relationship between the + * channels and execution units is depicted in the following diagram: + * + * ------- ------------ + * ---| ch0 |---| | + * ------- | | + * | |------+-------+-------+-------+------------ + * ------- | | | | | | | + * ---| ch1 |---| | | | | | | + * ------- | | ------ ------ ------ ------ ------ + * |controller| |DEU | |AESU| |MDEU| |PKEU| ... |RNG | + * ------- | | ------ ------ ------ ------ ------ + * ---| ch2 |---| | | | | | | + * ------- | | | | | | | + * | |------+-------+-------+-------+------------ + * ------- | | + * ---| ch3 |---| | + * ------- ------------ + * + * Channel ch0 may drive an aes operation to the aes unit (AESU), + * and, at the same time, ch1 may drive a message digest operation + * to the mdeu. Each channel has an input descriptor FIFO, and the + * FIFO can contain, e.g. on the 8541E, up to 24 entries, before a + * a buffer overrun error is triggered. The controller is responsible + * for fetching the data from descriptor pointers, and passing the + * data to the appropriate EUs. The controller also writes the + * cryptographic operation's result to memory. The SEC notifies + * completion by triggering an interrupt and/or setting the 1st byte + * of the hdr field to 0xff. + * + * TODO: + * o support more algorithms + * o support more versions of the SEC + * o add support for linux 2.4 + * o scatter-gather (sg) support + * o add support for public key ops (PKEU) + * o add statistics + */ + +#include <linux/version.h> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED) +#include <linux/config.h> +#endif +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/random.h> +#include <linux/skbuff.h> +#include <asm/scatterlist.h> +#include <linux/dma-mapping.h> /* dma_map_single() */ +#include <linux/moduleparam.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15) +#include <linux/platform_device.h> +#endif + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) +#include <linux/of_platform.h> +#endif + +#include <cryptodev.h> +#include <uio.h> + +#define DRV_NAME "talitos" + +#include "talitos_dev.h" +#include "talitos_soft.h" + +#define read_random(p,l) get_random_bytes(p,l) + +const char talitos_driver_name[] = "Talitos OCF"; +const char talitos_driver_version[] = "0.2"; + +static int talitos_newsession(device_t dev, u_int32_t *sidp, + struct cryptoini *cri); +static int talitos_freesession(device_t dev, u_int64_t tid); +static int talitos_process(device_t dev, struct cryptop *crp, int hint); +static void dump_talitos_status(struct talitos_softc *sc); +static int talitos_submit(struct talitos_softc *sc, struct talitos_desc *td, + int chsel); +static void talitos_doneprocessing(struct talitos_softc *sc); +static void talitos_init_device(struct talitos_softc *sc); +static void talitos_reset_device_master(struct talitos_softc *sc); +static void talitos_reset_device(struct talitos_softc *sc); +static void talitos_errorprocessing(struct talitos_softc *sc); +#ifdef CONFIG_PPC_MERGE +static int talitos_probe(struct of_device *ofdev, const struct of_device_id *match); +static int talitos_remove(struct of_device *ofdev); +#else +static int talitos_probe(struct platform_device *pdev); +static int talitos_remove(struct platform_device *pdev); +#endif +#ifdef CONFIG_OCF_RANDOMHARVEST +static int talitos_read_random(void *arg, u_int32_t *buf, int maxwords); +static void talitos_rng_init(struct talitos_softc *sc); +#endif + +static device_method_t talitos_methods = { + /* crypto device methods */ + DEVMETHOD(cryptodev_newsession, talitos_newsession), + DEVMETHOD(cryptodev_freesession,talitos_freesession), + DEVMETHOD(cryptodev_process, talitos_process), +}; + +#define debug talitos_debug +int talitos_debug = 0; +module_param(talitos_debug, int, 0644); +MODULE_PARM_DESC(talitos_debug, "Enable debug"); + +static inline void talitos_write(volatile unsigned *addr, u32 val) +{ + out_be32(addr, val); +} + +static inline u32 talitos_read(volatile unsigned *addr) +{ + u32 val; + val = in_be32(addr); + return val; +} + +static void dump_talitos_status(struct talitos_softc *sc) +{ + unsigned int v, v_hi, i, *ptr; + v = talitos_read(sc->sc_base_addr + TALITOS_MCR); + v_hi = talitos_read(sc->sc_base_addr + TALITOS_MCR_HI); + printk(KERN_INFO "%s: MCR 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), v, v_hi); + v = talitos_read(sc->sc_base_addr + TALITOS_IMR); + v_hi = talitos_read(sc->sc_base_addr + TALITOS_IMR_HI); + printk(KERN_INFO "%s: IMR 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), v, v_hi); + v = talitos_read(sc->sc_base_addr + TALITOS_ISR); + v_hi = talitos_read(sc->sc_base_addr + TALITOS_ISR_HI); + printk(KERN_INFO "%s: ISR 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), v, v_hi); + for (i = 0; i < sc->sc_num_channels; i++) { + v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CDPR); + v_hi = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CDPR_HI); + printk(KERN_INFO "%s: CDPR ch%d 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), i, v, v_hi); + } + for (i = 0; i < sc->sc_num_channels; i++) { + v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CCPSR); + v_hi = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CCPSR_HI); + printk(KERN_INFO "%s: CCPSR ch%d 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), i, v, v_hi); + } + ptr = sc->sc_base_addr + TALITOS_CH_DESCBUF; + for (i = 0; i < 16; i++) { + v = talitos_read(ptr++); v_hi = talitos_read(ptr++); + printk(KERN_INFO "%s: DESCBUF ch0 0x%08x_%08x (tdp%02d)\n", + device_get_nameunit(sc->sc_cdev), v, v_hi, i); + } + return; +} + + +#ifdef CONFIG_OCF_RANDOMHARVEST +/* + * pull random numbers off the RNG FIFO, not exceeding amount available + */ +static int +talitos_read_random(void *arg, u_int32_t *buf, int maxwords) +{ + struct talitos_softc *sc = (struct talitos_softc *) arg; + int rc; + u_int32_t v; + + DPRINTF("%s()\n", __FUNCTION__); + + /* check for things like FIFO underflow */ + v = talitos_read(sc->sc_base_addr + TALITOS_RNGISR_HI); + if (unlikely(v)) { + printk(KERN_ERR "%s: RNGISR_HI error %08x\n", + device_get_nameunit(sc->sc_cdev), v); + return 0; + } + /* + * OFL is number of available 64-bit words, + * shift and convert to a 32-bit word count + */ + v = talitos_read(sc->sc_base_addr + TALITOS_RNGSR_HI); + v = (v & TALITOS_RNGSR_HI_OFL) >> (16 - 1); + if (maxwords > v) + maxwords = v; + for (rc = 0; rc < maxwords; rc++) { + buf[rc] = talitos_read(sc->sc_base_addr + + TALITOS_RNG_FIFO + rc*sizeof(u_int32_t)); + } + if (maxwords & 1) { + /* + * RNG will complain with an AE in the RNGISR + * if we don't complete the pairs of 32-bit reads + * to its 64-bit register based FIFO + */ + v = talitos_read(sc->sc_base_addr + + TALITOS_RNG_FIFO + rc*sizeof(u_int32_t)); + } + + return rc; +} + +static void +talitos_rng_init(struct talitos_softc *sc) +{ + u_int32_t v; + + DPRINTF("%s()\n", __FUNCTION__); + /* reset RNG EU */ + v = talitos_read(sc->sc_base_addr + TALITOS_RNGRCR_HI); + v |= TALITOS_RNGRCR_HI_SR; + talitos_write(sc->sc_base_addr + TALITOS_RNGRCR_HI, v); + while ((talitos_read(sc->sc_base_addr + TALITOS_RNGSR_HI) + & TALITOS_RNGSR_HI_RD) == 0) + cpu_relax(); + /* + * we tell the RNG to start filling the RNG FIFO + * by writing the RNGDSR + */ + v = talitos_read(sc->sc_base_addr + TALITOS_RNGDSR_HI); + talitos_write(sc->sc_base_addr + TALITOS_RNGDSR_HI, v); + /* + * 64 bits of data will be pushed onto the FIFO every + * 256 SEC cycles until the FIFO is full. The RNG then + * attempts to keep the FIFO full. + */ + v = talitos_read(sc->sc_base_addr + TALITOS_RNGISR_HI); + if (v) { + printk(KERN_ERR "%s: RNGISR_HI error %08x\n", + device_get_nameunit(sc->sc_cdev), v); + return; + } + /* + * n.b. we need to add a FIPS test here - if the RNG is going + * to fail, it's going to fail at reset time + */ + return; +} +#endif /* CONFIG_OCF_RANDOMHARVEST */ + +/* + * Generate a new software session. + */ +static int +talitos_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri) +{ + struct cryptoini *c, *encini = NULL, *macini = NULL; + struct talitos_softc *sc = device_get_softc(dev); + struct talitos_session *ses = NULL; + int sesn; + + DPRINTF("%s()\n", __FUNCTION__); + if (sidp == NULL || cri == NULL || sc == NULL) { + DPRINTF("%s,%d - EINVAL\n", __FILE__, __LINE__); + return EINVAL; + } + for (c = cri; c != NULL; c = c->cri_next) { + if (c->cri_alg == CRYPTO_MD5 || + c->cri_alg == CRYPTO_MD5_HMAC || + c->cri_alg == CRYPTO_SHA1 || + 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 { + DPRINTF("UNKNOWN c->cri_alg %d\n", encini->cri_alg); + 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; + default: + DPRINTF("UNKNOWN encini->cri_alg %d\n", + encini->cri_alg); + return EINVAL; + } + } + + if (sc->sc_sessions == NULL) { + ses = sc->sc_sessions = (struct talitos_session *) + kmalloc(sizeof(struct talitos_session), SLAB_ATOMIC); + if (ses == NULL) + return ENOMEM; + memset(ses, 0, sizeof(struct talitos_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) { + /* allocating session */ + sesn = sc->sc_nsessions; + ses = (struct talitos_session *) kmalloc( + (sesn + 1) * sizeof(struct talitos_session), + SLAB_ATOMIC); + if (ses == NULL) + return ENOMEM; + memset(ses, 0, + (sesn + 1) * sizeof(struct talitos_session)); + memcpy(ses, sc->sc_sessions, + sesn * sizeof(struct talitos_session)); + memset(sc->sc_sessions, 0, + sesn * sizeof(struct talitos_session)); + kfree(sc->sc_sessions); + sc->sc_sessions = ses; + ses = &sc->sc_sessions[sesn]; + sc->sc_nsessions++; + } + } + + ses->ses_used = 1; + + if (encini) { + ses->ses_klen = (encini->cri_klen + 7) / 8; + memcpy(ses->ses_key, encini->cri_key, ses->ses_klen); + if (macini) { + /* doing hash on top of cipher */ + ses->ses_hmac_len = (macini->cri_klen + 7) / 8; + memcpy(ses->ses_hmac, macini->cri_key, + ses->ses_hmac_len); + } + } else if (macini) { + /* doing hash */ + ses->ses_klen = (macini->cri_klen + 7) / 8; + memcpy(ses->ses_key, macini->cri_key, ses->ses_klen); + } + + /* back compat way of determining MSC result len */ + 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; + } + } + + /* really should make up a template td here, + * and only fill things like i/o and direction in process() */ + + /* assign session ID */ + *sidp = TALITOS_SID(sc->sc_num, sesn); + return 0; +} + +/* + * Deallocate a session. + */ +static int +talitos_freesession(device_t dev, u_int64_t tid) +{ + struct talitos_softc *sc = device_get_softc(dev); + int session, ret; + u_int32_t sid = ((u_int32_t) tid) & 0xffffffff; + + if (sc == NULL) + return EINVAL; + session = TALITOS_SESSION(sid); + if (session < sc->sc_nsessions) { + memset(&sc->sc_sessions[session], 0, + sizeof(sc->sc_sessions[session])); + ret = 0; + } else + ret = EINVAL; + return ret; +} + +/* + * launch device processing - it will come back with done notification + * in the form of an interrupt and/or HDR_DONE_BITS in header + */ +static int +talitos_submit( + struct talitos_softc *sc, + struct talitos_desc *td, + int chsel) +{ + u_int32_t v; + + v = dma_map_single(NULL, td, sizeof(*td), DMA_TO_DEVICE); + talitos_write(sc->sc_base_addr + + chsel*TALITOS_CH_OFFSET + TALITOS_CH_FF, 0); + talitos_write(sc->sc_base_addr + + chsel*TALITOS_CH_OFFSET + TALITOS_CH_FF_HI, v); + return 0; +} + +static int +talitos_process(device_t dev, struct cryptop *crp, int hint) +{ + int i, err = 0, ivsize; + struct talitos_softc *sc = device_get_softc(dev); + struct cryptodesc *crd1, *crd2, *maccrd, *enccrd; + caddr_t iv; + struct talitos_session *ses; + struct talitos_desc *td; + unsigned long flags; + /* descriptor mappings */ + int hmac_key, hmac_data, cipher_iv, cipher_key, + in_fifo, out_fifo, cipher_iv_out; + static int chsel = -1; + u_int32_t rand_iv[4]; + + DPRINTF("%s()\n", __FUNCTION__); + + if (crp == NULL || crp->crp_callback == NULL || sc == NULL) { + return EINVAL; + } + crp->crp_etype = 0; + if (TALITOS_SESSION(crp->crp_sid) >= sc->sc_nsessions) { + return EINVAL; + } + + ses = &sc->sc_sessions[TALITOS_SESSION(crp->crp_sid)]; + + /* enter the channel scheduler */ + spin_lock_irqsave(&sc->sc_chnfifolock[sc->sc_num_channels], flags); + + /* reuse channel that already had/has requests for the required EU */ + for (i = 0; i < sc->sc_num_channels; i++) { + if (sc->sc_chnlastalg[i] == crp->crp_desc->crd_alg) + break; + } + if (i == sc->sc_num_channels) { + /* + * haven't seen this algo the last sc_num_channels or more + * use round robin in this case + * nb: sc->sc_num_channels must be power of 2 + */ + chsel = (chsel + 1) & (sc->sc_num_channels - 1); + } else { + /* + * matches channel with same target execution unit; + * use same channel in this case + */ + chsel = i; + } + sc->sc_chnlastalg[chsel] = crp->crp_desc->crd_alg; + + /* release the channel scheduler lock */ + spin_unlock_irqrestore(&sc->sc_chnfifolock[sc->sc_num_channels], flags); + + /* acquire the selected channel fifo lock */ + spin_lock_irqsave(&sc->sc_chnfifolock[chsel], flags); + + /* find and reserve next available descriptor-cryptop pair */ + for (i = 0; i < sc->sc_chfifo_len; i++) { + if (sc->sc_chnfifo[chsel][i].cf_desc.hdr == 0) { + /* + * ensure correct descriptor formation by + * avoiding inadvertently setting "optional" entries + * e.g. not using "optional" dptr2 for MD/HMAC descs + */ + memset(&sc->sc_chnfifo[chsel][i].cf_desc, + 0, sizeof(*td)); + /* reserve it with done notification request bit */ + sc->sc_chnfifo[chsel][i].cf_desc.hdr |= + TALITOS_DONE_NOTIFY; + break; + } + } + spin_unlock_irqrestore(&sc->sc_chnfifolock[chsel], flags); + + if (i == sc->sc_chfifo_len) { + /* fifo full */ + err = ERESTART; + goto errout; + } + + td = &sc->sc_chnfifo[chsel][i].cf_desc; + sc->sc_chnfifo[chsel][i].cf_crp = crp; + + crd1 = crp->crp_desc; + if (crd1 == NULL) { + err = EINVAL; + goto errout; + } + crd2 = crd1->crd_next; + /* prevent compiler warning */ + hmac_key = 0; + hmac_data = 0; + if (crd2 == NULL) { + td->hdr |= TD_TYPE_COMMON_NONSNOOP_NO_AFEU; + /* assign descriptor dword ptr mappings for this desc. type */ + cipher_iv = 1; + cipher_key = 2; + in_fifo = 3; + cipher_iv_out = 5; + if (crd1->crd_alg == CRYPTO_MD5_HMAC || + crd1->crd_alg == CRYPTO_SHA1_HMAC || + crd1->crd_alg == CRYPTO_SHA1 || + crd1->crd_alg == CRYPTO_MD5) { + out_fifo = 5; + maccrd = crd1; + enccrd = NULL; + } else if (crd1->crd_alg == CRYPTO_DES_CBC || + crd1->crd_alg == CRYPTO_3DES_CBC || + crd1->crd_alg == CRYPTO_AES_CBC || + crd1->crd_alg == CRYPTO_ARC4) { + out_fifo = 4; + maccrd = NULL; + enccrd = crd1; + } else { + DPRINTF("UNKNOWN crd1->crd_alg %d\n", crd1->crd_alg); + err = EINVAL; + goto errout; + } + } else { + if (sc->sc_desc_types & TALITOS_HAS_DT_IPSEC_ESP) { + td->hdr |= TD_TYPE_IPSEC_ESP; + } else { + DPRINTF("unimplemented: multiple descriptor ipsec\n"); + err = EINVAL; + goto errout; + } + /* assign descriptor dword ptr mappings for this desc. type */ + hmac_key = 0; + hmac_data = 1; + cipher_iv = 2; + cipher_key = 3; + in_fifo = 4; + out_fifo = 5; + cipher_iv_out = 6; + if ((crd1->crd_alg == CRYPTO_MD5_HMAC || + crd1->crd_alg == CRYPTO_SHA1_HMAC || + crd1->crd_alg == CRYPTO_MD5 || + crd1->crd_alg == CRYPTO_SHA1) && + (crd2->crd_alg == CRYPTO_DES_CBC || + crd2->crd_alg == CRYPTO_3DES_CBC || + crd2->crd_alg == CRYPTO_AES_CBC || + crd2->crd_alg == CRYPTO_ARC4) && + ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) { + maccrd = crd1; + enccrd = crd2; + } else if ((crd1->crd_alg == CRYPTO_DES_CBC || + crd1->crd_alg == CRYPTO_ARC4 || + crd1->crd_alg == CRYPTO_3DES_CBC || + crd1->crd_alg == CRYPTO_AES_CBC) && + (crd2->crd_alg == CRYPTO_MD5_HMAC || + crd2->crd_alg == CRYPTO_SHA1_HMAC || + crd2->crd_alg == CRYPTO_MD5 || + crd2->crd_alg == CRYPTO_SHA1) && + (crd1->crd_flags & CRD_F_ENCRYPT)) { + enccrd = crd1; + maccrd = crd2; + } else { + /* We cannot order the SEC as requested */ + printk("%s: cannot do the order\n", + device_get_nameunit(sc->sc_cdev)); + err = EINVAL; + goto errout; + } + } + /* assign in_fifo and out_fifo based on input/output struct type */ + if (crp->crp_flags & CRYPTO_F_SKBUF) { + /* using SKB buffers */ + struct sk_buff *skb = (struct sk_buff *)crp->crp_buf; + if (skb_shinfo(skb)->nr_frags) { + printk("%s: skb frags unimplemented\n", + device_get_nameunit(sc->sc_cdev)); + err = EINVAL; + goto errout; + } + td->ptr[in_fifo].ptr = dma_map_single(NULL, skb->data, + skb->len, DMA_TO_DEVICE); + td->ptr[in_fifo].len = skb->len; + td->ptr[out_fifo].ptr = dma_map_single(NULL, skb->data, + skb->len, DMA_TO_DEVICE); + td->ptr[out_fifo].len = skb->len; + td->ptr[hmac_data].ptr = dma_map_single(NULL, skb->data, + skb->len, DMA_TO_DEVICE); + } else if (crp->crp_flags & CRYPTO_F_IOV) { + /* using IOV buffers */ + struct uio *uiop = (struct uio *)crp->crp_buf; + if (uiop->uio_iovcnt > 1) { + printk("%s: iov frags unimplemented\n", + device_get_nameunit(sc->sc_cdev)); + err = EINVAL; + goto errout; + } + td->ptr[in_fifo].ptr = dma_map_single(NULL, + uiop->uio_iov->iov_base, crp->crp_ilen, DMA_TO_DEVICE); + td->ptr[in_fifo].len = crp->crp_ilen; + /* crp_olen is never set; always use crp_ilen */ + td->ptr[out_fifo].ptr = dma_map_single(NULL, + uiop->uio_iov->iov_base, + crp->crp_ilen, DMA_TO_DEVICE); + td->ptr[out_fifo].len = crp->crp_ilen; + } else { + /* using contig buffers */ + td->ptr[in_fifo].ptr = dma_map_single(NULL, + crp->crp_buf, crp->crp_ilen, DMA_TO_DEVICE); + td->ptr[in_fifo].len = crp->crp_ilen; + td->ptr[out_fifo].ptr = dma_map_single(NULL, + crp->crp_buf, crp->crp_ilen, DMA_TO_DEVICE); + td->ptr[out_fifo].len = crp->crp_ilen; + } + if (enccrd) { + switch (enccrd->crd_alg) { + case CRYPTO_3DES_CBC: + td->hdr |= TALITOS_MODE0_DEU_3DES; + /* FALLTHROUGH */ + case CRYPTO_DES_CBC: + td->hdr |= TALITOS_SEL0_DEU + | TALITOS_MODE0_DEU_CBC; + if (enccrd->crd_flags & CRD_F_ENCRYPT) + td->hdr |= TALITOS_MODE0_DEU_ENC; + ivsize = 2*sizeof(u_int32_t); + DPRINTF("%cDES ses %d ch %d len %d\n", + (td->hdr & TALITOS_MODE0_DEU_3DES)?'3':'1', + (u32)TALITOS_SESSION(crp->crp_sid), + chsel, td->ptr[in_fifo].len); + break; + case CRYPTO_AES_CBC: + td->hdr |= TALITOS_SEL0_AESU + | TALITOS_MODE0_AESU_CBC; + if (enccrd->crd_flags & CRD_F_ENCRYPT) + td->hdr |= TALITOS_MODE0_AESU_ENC; + ivsize = 4*sizeof(u_int32_t); + DPRINTF("AES ses %d ch %d len %d\n", + (u32)TALITOS_SESSION(crp->crp_sid), + chsel, td->ptr[in_fifo].len); + break; + default: + printk("%s: unimplemented enccrd->crd_alg %d\n", + device_get_nameunit(sc->sc_cdev), enccrd->crd_alg); + err = EINVAL; + goto errout; + } + /* + * 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) { + td->hdr |= TALITOS_DIR_OUTBOUND; + if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) + iv = enccrd->crd_iv; + else + read_random((iv = (caddr_t) rand_iv), sizeof(rand_iv)); + if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) { + crypto_copyback(crp->crp_flags, crp->crp_buf, + enccrd->crd_inject, ivsize, iv); + } + } else { + td->hdr |= TALITOS_DIR_INBOUND; + if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) { + iv = enccrd->crd_iv; + } else { + iv = (caddr_t) rand_iv; + crypto_copydata(crp->crp_flags, crp->crp_buf, + enccrd->crd_inject, ivsize, iv); + } + } + td->ptr[cipher_iv].ptr = dma_map_single(NULL, iv, ivsize, + DMA_TO_DEVICE); + td->ptr[cipher_iv].len = ivsize; + /* + * we don't need the cipher iv out length/pointer + * field to do ESP IPsec. Therefore we set the len field as 0, + * which tells the SEC not to do anything with this len/ptr + * field. Previously, when length/pointer as pointing to iv, + * it gave us corruption of packets. + */ + td->ptr[cipher_iv_out].len = 0; + } + if (enccrd && maccrd) { + /* this is ipsec only for now */ + td->hdr |= TALITOS_SEL1_MDEU + | TALITOS_MODE1_MDEU_INIT + | TALITOS_MODE1_MDEU_PAD; + switch (maccrd->crd_alg) { + case CRYPTO_MD5: + td->hdr |= TALITOS_MODE1_MDEU_MD5; + break; + case CRYPTO_MD5_HMAC: + td->hdr |= TALITOS_MODE1_MDEU_MD5_HMAC; + break; + case CRYPTO_SHA1: + td->hdr |= TALITOS_MODE1_MDEU_SHA1; + break; + case CRYPTO_SHA1_HMAC: + td->hdr |= TALITOS_MODE1_MDEU_SHA1_HMAC; + break; + default: + /* We cannot order the SEC as requested */ + printk("%s: cannot do the order\n", + device_get_nameunit(sc->sc_cdev)); + err = EINVAL; + goto errout; + } + if ((maccrd->crd_alg == CRYPTO_MD5_HMAC) || + (maccrd->crd_alg == CRYPTO_SHA1_HMAC)) { + /* + * The offset from hash data to the start of + * crypt data is the difference in the skips. + */ + /* ipsec only for now */ + td->ptr[hmac_key].ptr = dma_map_single(NULL, + ses->ses_hmac, ses->ses_hmac_len, DMA_TO_DEVICE); + td->ptr[hmac_key].len = ses->ses_hmac_len; + td->ptr[in_fifo].ptr += enccrd->crd_skip; + td->ptr[in_fifo].len = enccrd->crd_len; + td->ptr[out_fifo].ptr += enccrd->crd_skip; + td->ptr[out_fifo].len = enccrd->crd_len; + /* bytes of HMAC to postpend to ciphertext */ + td->ptr[out_fifo].extent = ses->ses_mlen; + td->ptr[hmac_data].ptr += maccrd->crd_skip; + td->ptr[hmac_data].len = enccrd->crd_skip - maccrd->crd_skip; + } + if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT) { + printk("%s: CRD_F_KEY_EXPLICIT unimplemented\n", + device_get_nameunit(sc->sc_cdev)); + } + } + if (!enccrd && maccrd) { + /* single MD5 or SHA */ + td->hdr |= TALITOS_SEL0_MDEU + | TALITOS_MODE0_MDEU_INIT + | TALITOS_MODE0_MDEU_PAD; + switch (maccrd->crd_alg) { + case CRYPTO_MD5: + td->hdr |= TALITOS_MODE0_MDEU_MD5; + DPRINTF("MD5 ses %d ch %d len %d\n", + (u32)TALITOS_SESSION(crp->crp_sid), + chsel, td->ptr[in_fifo].len); + break; + case CRYPTO_MD5_HMAC: + td->hdr |= TALITOS_MODE0_MDEU_MD5_HMAC; + break; + case CRYPTO_SHA1: + td->hdr |= TALITOS_MODE0_MDEU_SHA1; + DPRINTF("SHA1 ses %d ch %d len %d\n", + (u32)TALITOS_SESSION(crp->crp_sid), + chsel, td->ptr[in_fifo].len); + break; + case CRYPTO_SHA1_HMAC: + td->hdr |= TALITOS_MODE0_MDEU_SHA1_HMAC; + break; + default: + /* We cannot order the SEC as requested */ + DPRINTF("cannot do the order\n"); + err = EINVAL; + goto errout; + } + + if (crp->crp_flags & CRYPTO_F_IOV) + td->ptr[out_fifo].ptr += maccrd->crd_inject; + + if ((maccrd->crd_alg == CRYPTO_MD5_HMAC) || + (maccrd->crd_alg == CRYPTO_SHA1_HMAC)) { + td->ptr[hmac_key].ptr = dma_map_single(NULL, + ses->ses_hmac, ses->ses_hmac_len, + DMA_TO_DEVICE); + td->ptr[hmac_key].len = ses->ses_hmac_len; + } + } + else { + /* using process key (session data has duplicate) */ + td->ptr[cipher_key].ptr = dma_map_single(NULL, + enccrd->crd_key, (enccrd->crd_klen + 7) / 8, + DMA_TO_DEVICE); + td->ptr[cipher_key].len = (enccrd->crd_klen + 7) / 8; + } + /* descriptor complete - GO! */ + return talitos_submit(sc, td, chsel); + +errout: + if (err != ERESTART) { + crp->crp_etype = err; + crypto_done(crp); + } + return err; +} + +/* go through all channels descriptors, notifying OCF what has + * _and_hasn't_ successfully completed and reset the device + * (otherwise it's up to decoding desc hdrs!) + */ +static void talitos_errorprocessing(struct talitos_softc *sc) +{ + unsigned long flags; + int i, j; + + /* disable further scheduling until under control */ + spin_lock_irqsave(&sc->sc_chnfifolock[sc->sc_num_channels], flags); + + if (debug) dump_talitos_status(sc); + /* go through descriptors, try and salvage those successfully done, + * and EIO those that weren't + */ + for (i = 0; i < sc->sc_num_channels; i++) { + spin_lock_irqsave(&sc->sc_chnfifolock[i], flags); + for (j = 0; j < sc->sc_chfifo_len; j++) { + if (sc->sc_chnfifo[i][j].cf_desc.hdr) { + if ((sc->sc_chnfifo[i][j].cf_desc.hdr + & TALITOS_HDR_DONE_BITS) + != TALITOS_HDR_DONE_BITS) { + /* this one didn't finish */ + /* signify in crp->etype */ + sc->sc_chnfifo[i][j].cf_crp->crp_etype + = EIO; + } + } else + continue; /* free entry */ + /* either way, notify ocf */ + crypto_done(sc->sc_chnfifo[i][j].cf_crp); + /* and tag it available again + * + * memset to ensure correct descriptor formation by + * avoiding inadvertently setting "optional" entries + * e.g. not using "optional" dptr2 MD/HMAC processing + */ + memset(&sc->sc_chnfifo[i][j].cf_desc, + 0, sizeof(struct talitos_desc)); + } + spin_unlock_irqrestore(&sc->sc_chnfifolock[i], flags); + } + /* reset and initialize the SEC h/w device */ + talitos_reset_device(sc); + talitos_init_device(sc); +#ifdef CONFIG_OCF_RANDOMHARVEST + if (sc->sc_exec_units & TALITOS_HAS_EU_RNG) + talitos_rng_init(sc); +#endif + + /* Okay. Stand by. */ + spin_unlock_irqrestore(&sc->sc_chnfifolock[sc->sc_num_channels], flags); + + return; +} + +/* go through all channels descriptors, notifying OCF what's been done */ +static void talitos_doneprocessing(struct talitos_softc *sc) +{ + unsigned long flags; + int i, j; + + /* go through descriptors looking for done bits */ + for (i = 0; i < sc->sc_num_channels; i++) { + spin_lock_irqsave(&sc->sc_chnfifolock[i], flags); + for (j = 0; j < sc->sc_chfifo_len; j++) { + /* descriptor has done bits set? */ + if ((sc->sc_chnfifo[i][j].cf_desc.hdr + & TALITOS_HDR_DONE_BITS) + == TALITOS_HDR_DONE_BITS) { + /* notify ocf */ + crypto_done(sc->sc_chnfifo[i][j].cf_crp); + /* and tag it available again + * + * memset to ensure correct descriptor formation by + * avoiding inadvertently setting "optional" entries + * e.g. not using "optional" dptr2 MD/HMAC processing + */ + memset(&sc->sc_chnfifo[i][j].cf_desc, + 0, sizeof(struct talitos_desc)); + } + } + spin_unlock_irqrestore(&sc->sc_chnfifolock[i], flags); + } + return; +} + +static irqreturn_t +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) +talitos_intr(int irq, void *arg) +#else +talitos_intr(int irq, void *arg, struct pt_regs *regs) +#endif +{ + struct talitos_softc *sc = arg; + u_int32_t v, v_hi; + + /* ack */ + v = talitos_read(sc->sc_base_addr + TALITOS_ISR); + v_hi = talitos_read(sc->sc_base_addr + TALITOS_ISR_HI); + talitos_write(sc->sc_base_addr + TALITOS_ICR, v); + talitos_write(sc->sc_base_addr + TALITOS_ICR_HI, v_hi); + + if (unlikely(v & TALITOS_ISR_ERROR)) { + /* Okay, Houston, we've had a problem here. */ + printk(KERN_DEBUG "%s: got error interrupt - ISR 0x%08x_%08x\n", + device_get_nameunit(sc->sc_cdev), v, v_hi); + talitos_errorprocessing(sc); + } else + if (likely(v & TALITOS_ISR_DONE)) { + talitos_doneprocessing(sc); + } + return IRQ_HANDLED; +} + +/* + * Initialize registers we need to touch only once. + */ +static void +talitos_init_device(struct talitos_softc *sc) +{ + u_int32_t v; + int i; + + DPRINTF("%s()\n", __FUNCTION__); + + /* init all channels */ + for (i = 0; i < sc->sc_num_channels; i++) { + v = talitos_read(sc->sc_base_addr + + i*TALITOS_CH_OFFSET + TALITOS_CH_CCCR_HI); + v |= TALITOS_CH_CCCR_HI_CDWE + | TALITOS_CH_CCCR_HI_CDIE; /* invoke interrupt if done */ + talitos_write(sc->sc_base_addr + + i*TALITOS_CH_OFFSET + TALITOS_CH_CCCR_HI, v); + } + /* enable all interrupts */ + v = talitos_read(sc->sc_base_addr + TALITOS_IMR); + v |= TALITOS_IMR_ALL; + talitos_write(sc->sc_base_addr + TALITOS_IMR, v); + v = talitos_read(sc->sc_base_addr + TALITOS_IMR_HI); + v |= TALITOS_IMR_HI_ERRONLY; + talitos_write(sc->sc_base_addr + TALITOS_IMR_HI, v); + return; +} + +/* + * set the master reset bit on the device. + */ +static void +talitos_reset_device_master(struct talitos_softc *sc) +{ + u_int32_t v; + + /* Reset the device by writing 1 to MCR:SWR and waiting 'til cleared */ + v = talitos_read(sc->sc_base_addr + TALITOS_MCR); + talitos_write(sc->sc_base_addr + TALITOS_MCR, v | TALITOS_MCR_SWR); + + while (talitos_read(sc->sc_base_addr + TALITOS_MCR) & TALITOS_MCR_SWR) + cpu_relax(); + + return; +} + +/* + * Resets the device. Values in the registers are left as is + * from the reset (i.e. initial values are assigned elsewhere). + */ +static void +talitos_reset_device(struct talitos_softc *sc) +{ + u_int32_t v; + int i; + + DPRINTF("%s()\n", __FUNCTION__); + + /* + * Master reset + * errata documentation: warning: certain SEC interrupts + * are not fully cleared by writing the MCR:SWR bit, + * set bit twice to completely reset + */ + talitos_reset_device_master(sc); /* once */ + talitos_reset_device_master(sc); /* and once again */ + + /* reset all channels */ + for (i = 0; i < sc->sc_num_channels; i++) { + v = talitos_read(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CCCR); + talitos_write(sc->sc_base_addr + i*TALITOS_CH_OFFSET + + TALITOS_CH_CCCR, v | TALITOS_CH_CCCR_RESET); + } +} + +/* Set up the crypto device structure, private data, + * and anything else we need before we start */ +#ifdef CONFIG_PPC_MERGE +static int talitos_probe(struct of_device *ofdev, const struct of_device_id *match) +#else +static int talitos_probe(struct platform_device *pdev) +#endif +{ + struct talitos_softc *sc = NULL; + struct resource *r; +#ifdef CONFIG_PPC_MERGE + struct device *device = &ofdev->dev; + struct device_node *np = ofdev->node; + const unsigned int *prop; + int err; + struct resource res; +#endif + static int num_chips = 0; + int rc; + int i; + + DPRINTF("%s()\n", __FUNCTION__); + + sc = (struct talitos_softc *) kmalloc(sizeof(*sc), GFP_KERNEL); + if (!sc) + return -ENOMEM; + memset(sc, 0, sizeof(*sc)); + + softc_device_init(sc, DRV_NAME, num_chips, talitos_methods); + + sc->sc_irq = -1; + sc->sc_cid = -1; +#ifndef CONFIG_PPC_MERGE + sc->sc_dev = pdev; +#endif + sc->sc_num = num_chips++; + +#ifdef CONFIG_PPC_MERGE + dev_set_drvdata(device, sc); +#else + platform_set_drvdata(sc->sc_dev, sc); +#endif + + /* get the irq line */ +#ifdef CONFIG_PPC_MERGE + err = of_address_to_resource(np, 0, &res); + if (err) + return -EINVAL; + r = &res; + + sc->sc_irq = irq_of_parse_and_map(np, 0); +#else + /* get a pointer to the register memory */ + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + sc->sc_irq = platform_get_irq(pdev, 0); +#endif + rc = request_irq(sc->sc_irq, talitos_intr, 0, + device_get_nameunit(sc->sc_cdev), sc); + if (rc) { + printk(KERN_ERR "%s: failed to hook irq %d\n", + device_get_nameunit(sc->sc_cdev), sc->sc_irq); + sc->sc_irq = -1; + goto out; + } + + sc->sc_base_addr = (ocf_iomem_t) ioremap(r->start, (r->end - r->start)); + if (!sc->sc_base_addr) { + printk(KERN_ERR "%s: failed to ioremap\n", + device_get_nameunit(sc->sc_cdev)); + goto out; + } + + /* figure out our SEC's properties and capabilities */ + sc->sc_chiprev = (u64)talitos_read(sc->sc_base_addr + TALITOS_ID) << 32 + | talitos_read(sc->sc_base_addr + TALITOS_ID_HI); + DPRINTF("sec id 0x%llx\n", sc->sc_chiprev); + +#ifdef CONFIG_PPC_MERGE + /* get SEC properties from device tree, defaulting to SEC 2.0 */ + + prop = of_get_property(np, "num-channels", NULL); + sc->sc_num_channels = prop ? *prop : TALITOS_NCHANNELS_SEC_2_0; + + prop = of_get_property(np, "channel-fifo-len", NULL); + sc->sc_chfifo_len = prop ? *prop : TALITOS_CHFIFOLEN_SEC_2_0; + + prop = of_get_property(np, "exec-units-mask", NULL); + sc->sc_exec_units = prop ? *prop : TALITOS_HAS_EUS_SEC_2_0; + + prop = of_get_property(np, "descriptor-types-mask", NULL); + sc->sc_desc_types = prop ? *prop : TALITOS_HAS_DESCTYPES_SEC_2_0; +#else + /* bulk should go away with openfirmware flat device tree support */ + if (sc->sc_chiprev & TALITOS_ID_SEC_2_0) { + sc->sc_num_channels = TALITOS_NCHANNELS_SEC_2_0; + sc->sc_chfifo_len = TALITOS_CHFIFOLEN_SEC_2_0; + sc->sc_exec_units = TALITOS_HAS_EUS_SEC_2_0; + sc->sc_desc_types = TALITOS_HAS_DESCTYPES_SEC_2_0; + } else { + printk(KERN_ERR "%s: failed to id device\n", + device_get_nameunit(sc->sc_cdev)); + goto out; + } +#endif + + /* + 1 is for the meta-channel lock used by the channel scheduler */ + sc->sc_chnfifolock = (spinlock_t *) kmalloc( + (sc->sc_num_channels + 1) * sizeof(spinlock_t), GFP_KERNEL); + if (!sc->sc_chnfifolock) + goto out; + for (i = 0; i < sc->sc_num_channels + 1; i++) { + spin_lock_init(&sc->sc_chnfifolock[i]); + } + + sc->sc_chnlastalg = (int *) kmalloc( + sc->sc_num_channels * sizeof(int), GFP_KERNEL); + if (!sc->sc_chnlastalg) + goto out; + memset(sc->sc_chnlastalg, 0, sc->sc_num_channels * sizeof(int)); + + sc->sc_chnfifo = (struct desc_cryptop_pair **) kmalloc( + sc->sc_num_channels * sizeof(struct desc_cryptop_pair *), + GFP_KERNEL); + if (!sc->sc_chnfifo) + goto out; + for (i = 0; i < sc->sc_num_channels; i++) { + sc->sc_chnfifo[i] = (struct desc_cryptop_pair *) kmalloc( + sc->sc_chfifo_len * sizeof(struct desc_cryptop_pair), + GFP_KERNEL); + if (!sc->sc_chnfifo[i]) + goto out; + memset(sc->sc_chnfifo[i], 0, + sc->sc_chfifo_len * sizeof(struct desc_cryptop_pair)); + } + + /* reset and initialize the SEC h/w device */ + talitos_reset_device(sc); + talitos_init_device(sc); + + sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE); + if (sc->sc_cid < 0) { + printk(KERN_ERR "%s: could not get crypto driver id\n", + device_get_nameunit(sc->sc_cdev)); + goto out; + } + + /* register algorithms with the framework */ + printk("%s:", device_get_nameunit(sc->sc_cdev)); + + if (sc->sc_exec_units & TALITOS_HAS_EU_RNG) { + printk(" rng"); +#ifdef CONFIG_OCF_RANDOMHARVEST + talitos_rng_init(sc); + crypto_rregister(sc->sc_cid, talitos_read_random, sc); +#endif + } + if (sc->sc_exec_units & TALITOS_HAS_EU_DEU) { + printk(" des/3des"); + crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); + crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); + } + if (sc->sc_exec_units & TALITOS_HAS_EU_AESU) { + printk(" aes"); + crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); + } + if (sc->sc_exec_units & TALITOS_HAS_EU_MDEU) { + printk(" md5"); + crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0); + /* HMAC support only with IPsec for now */ + crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); + printk(" sha1"); + crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0); + /* HMAC support only with IPsec for now */ + crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); + } + printk("\n"); + return 0; + +out: +#ifndef CONFIG_PPC_MERGE + talitos_remove(pdev); +#endif + return -ENOMEM; +} + +#ifdef CONFIG_PPC_MERGE +static int talitos_remove(struct of_device *ofdev) +#else +static int talitos_remove(struct platform_device *pdev) +#endif +{ +#ifdef CONFIG_PPC_MERGE + struct talitos_softc *sc = dev_get_drvdata(&ofdev->dev); +#else + struct talitos_softc *sc = platform_get_drvdata(pdev); +#endif + int i; + + DPRINTF("%s()\n", __FUNCTION__); + if (sc->sc_cid >= 0) + crypto_unregister_all(sc->sc_cid); + if (sc->sc_chnfifo) { + for (i = 0; i < sc->sc_num_channels; i++) + if (sc->sc_chnfifo[i]) + kfree(sc->sc_chnfifo[i]); + kfree(sc->sc_chnfifo); + } + if (sc->sc_chnlastalg) + kfree(sc->sc_chnlastalg); + if (sc->sc_chnfifolock) + kfree(sc->sc_chnfifolock); + if (sc->sc_irq != -1) + free_irq(sc->sc_irq, sc); + if (sc->sc_base_addr) + iounmap((void *) sc->sc_base_addr); + kfree(sc); + return 0; +} + +#ifdef CONFIG_PPC_MERGE +static struct of_device_id talitos_match[] = { + { + .type = "crypto", + .compatible = "talitos", + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, talitos_match); + +static struct of_platform_driver talitos_driver = { + .name = DRV_NAME, + .match_table = talitos_match, + .probe = talitos_probe, + .remove = talitos_remove, +}; + +static int __init talitos_init(void) +{ + return of_register_platform_driver(&talitos_driver); +} + +static void __exit talitos_exit(void) +{ + of_unregister_platform_driver(&talitos_driver); +} +#else +/* Structure for a platform device driver */ +static struct platform_driver talitos_driver = { + .probe = talitos_probe, + .remove = talitos_remove, + .driver = { + .name = "fsl-sec2", + } +}; + +static int __init talitos_init(void) +{ + return platform_driver_register(&talitos_driver); +} + +static void __exit talitos_exit(void) +{ + platform_driver_unregister(&talitos_driver); +} +#endif + +module_init(talitos_init); +module_exit(talitos_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_AUTHOR("kim.phillips@freescale.com"); +MODULE_DESCRIPTION("OCF driver for Freescale SEC (talitos)"); |