diff options
Diffstat (limited to 'target/linux/generic-2.6/files/crypto/ocf/pasemi/pasemi.c')
| -rw-r--r-- | target/linux/generic-2.6/files/crypto/ocf/pasemi/pasemi.c | 1009 |
1 files changed, 0 insertions, 1009 deletions
diff --git a/target/linux/generic-2.6/files/crypto/ocf/pasemi/pasemi.c b/target/linux/generic-2.6/files/crypto/ocf/pasemi/pasemi.c deleted file mode 100644 index c3bb931..0000000 --- a/target/linux/generic-2.6/files/crypto/ocf/pasemi/pasemi.c +++ /dev/null @@ -1,1009 +0,0 @@ -/* - * Copyright (C) 2007 PA Semi, Inc - * - * Driver for the PA Semi PWRficient DMA Crypto Engine - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifndef AUTOCONF_INCLUDED -#include <linux/config.h> -#endif -#include <linux/module.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/timer.h> -#include <linux/random.h> -#include <linux/skbuff.h> -#include <asm/scatterlist.h> -#include <linux/moduleparam.h> -#include <linux/pci.h> -#include <cryptodev.h> -#include <uio.h> -#include "pasemi_fnu.h" - -#define DRV_NAME "pasemi" - -#define TIMER_INTERVAL 1000 - -static void __devexit pasemi_dma_remove(struct pci_dev *pdev); -static struct pasdma_status volatile * dma_status; - -static int debug; -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Enable debug"); - -static void pasemi_desc_start(struct pasemi_desc *desc, u64 hdr) -{ - desc->postop = 0; - desc->quad[0] = hdr; - desc->quad_cnt = 1; - desc->size = 1; -} - -static void pasemi_desc_build(struct pasemi_desc *desc, u64 val) -{ - desc->quad[desc->quad_cnt++] = val; - desc->size = (desc->quad_cnt + 1) / 2; -} - -static void pasemi_desc_hdr(struct pasemi_desc *desc, u64 hdr) -{ - desc->quad[0] |= hdr; -} - -static int pasemi_desc_size(struct pasemi_desc *desc) -{ - return desc->size; -} - -static void pasemi_ring_add_desc( - struct pasemi_fnu_txring *ring, - struct pasemi_desc *desc, - struct cryptop *crp) { - int i; - int ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1)); - - TX_DESC_INFO(ring, ring->next_to_fill).desc_size = desc->size; - TX_DESC_INFO(ring, ring->next_to_fill).desc_postop = desc->postop; - TX_DESC_INFO(ring, ring->next_to_fill).cf_crp = crp; - - for (i = 0; i < desc->quad_cnt; i += 2) { - ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1)); - ring->desc[ring_index] = desc->quad[i]; - ring->desc[ring_index + 1] = desc->quad[i + 1]; - ring->next_to_fill++; - } - - if (desc->quad_cnt & 1) - ring->desc[ring_index + 1] = 0; -} - -static void pasemi_ring_incr(struct pasemi_softc *sc, int chan_index, int incr) -{ - out_le32(sc->dma_regs + PAS_DMA_TXCHAN_INCR(sc->base_chan + chan_index), - incr); -} - -/* - * Generate a new software session. - */ -static int -pasemi_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri) -{ - struct cryptoini *c, *encini = NULL, *macini = NULL; - struct pasemi_softc *sc = device_get_softc(dev); - struct pasemi_session *ses = NULL, **sespp; - int sesn, blksz = 0; - u64 ccmd = 0; - unsigned long flags; - struct pasemi_desc init_desc; - struct pasemi_fnu_txring *txring; - - 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 (ALG_IS_SIG(c->cri_alg)) { - if (macini) - return -EINVAL; - macini = c; - } else if (ALG_IS_CIPHER(c->cri_alg)) { - if (encini) - return -EINVAL; - encini = c; - } else { - DPRINTF("UNKNOWN c->cri_alg %d\n", c->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; - ccmd = DMA_CALGO_DES; - break; - case CRYPTO_3DES_CBC: - if (encini->cri_klen != 192) - return -EINVAL; - ccmd = DMA_CALGO_3DES; - break; - case CRYPTO_AES_CBC: - if (encini->cri_klen != 128 && - encini->cri_klen != 192 && - encini->cri_klen != 256) - return -EINVAL; - ccmd = DMA_CALGO_AES; - break; - case CRYPTO_ARC4: - if (encini->cri_klen != 128) - return -EINVAL; - ccmd = DMA_CALGO_ARC; - break; - default: - DPRINTF("UNKNOWN encini->cri_alg %d\n", - encini->cri_alg); - return -EINVAL; - } - } - - if (macini) { - switch (macini->cri_alg) { - case CRYPTO_MD5: - case CRYPTO_MD5_HMAC: - blksz = 16; - break; - case CRYPTO_SHA1: - case CRYPTO_SHA1_HMAC: - blksz = 20; - break; - default: - DPRINTF("UNKNOWN macini->cri_alg %d\n", - macini->cri_alg); - return -EINVAL; - } - if (((macini->cri_klen + 7) / 8) > blksz) { - DPRINTF("key length %d bigger than blksize %d not supported\n", - ((macini->cri_klen + 7) / 8), blksz); - return -EINVAL; - } - } - - for (sesn = 0; sesn < sc->sc_nsessions; sesn++) { - if (sc->sc_sessions[sesn] == NULL) { - sc->sc_sessions[sesn] = (struct pasemi_session *) - kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC); - ses = sc->sc_sessions[sesn]; - break; - } else if (sc->sc_sessions[sesn]->used == 0) { - ses = sc->sc_sessions[sesn]; - break; - } - } - - if (ses == NULL) { - sespp = (struct pasemi_session **) - kzalloc(sc->sc_nsessions * 2 * - sizeof(struct pasemi_session *), GFP_ATOMIC); - if (sespp == NULL) - return -ENOMEM; - memcpy(sespp, sc->sc_sessions, - sc->sc_nsessions * sizeof(struct pasemi_session *)); - kfree(sc->sc_sessions); - sc->sc_sessions = sespp; - sesn = sc->sc_nsessions; - ses = sc->sc_sessions[sesn] = (struct pasemi_session *) - kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC); - if (ses == NULL) - return -ENOMEM; - sc->sc_nsessions *= 2; - } - - ses->used = 1; - - ses->dma_addr = pci_map_single(sc->dma_pdev, (void *) ses->civ, - sizeof(struct pasemi_session), DMA_TO_DEVICE); - - /* enter the channel scheduler */ - spin_lock_irqsave(&sc->sc_chnlock, flags); - - /* ARC4 has to be processed by the even channel */ - if (encini && (encini->cri_alg == CRYPTO_ARC4)) - ses->chan = sc->sc_lastchn & ~1; - else - ses->chan = sc->sc_lastchn; - sc->sc_lastchn = (sc->sc_lastchn + 1) % sc->sc_num_channels; - - spin_unlock_irqrestore(&sc->sc_chnlock, flags); - - txring = &sc->tx[ses->chan]; - - if (encini) { - ses->ccmd = ccmd; - - /* get an IV */ - /* XXX may read fewer than requested */ - get_random_bytes(ses->civ, sizeof(ses->civ)); - - ses->keysz = (encini->cri_klen - 63) / 64; - memcpy(ses->key, encini->cri_key, (ses->keysz + 1) * 8); - - pasemi_desc_start(&init_desc, - XCT_CTRL_HDR(ses->chan, (encini && macini) ? 0x68 : 0x40, DMA_FN_CIV0)); - pasemi_desc_build(&init_desc, - XCT_FUN_SRC_PTR((encini && macini) ? 0x68 : 0x40, ses->dma_addr)); - } - if (macini) { - if (macini->cri_alg == CRYPTO_MD5_HMAC || - macini->cri_alg == CRYPTO_SHA1_HMAC) - memcpy(ses->hkey, macini->cri_key, blksz); - else { - /* Load initialization constants(RFC 1321, 3174) */ - ses->hiv[0] = 0x67452301efcdab89ULL; - ses->hiv[1] = 0x98badcfe10325476ULL; - ses->hiv[2] = 0xc3d2e1f000000000ULL; - } - ses->hseq = 0ULL; - } - - spin_lock_irqsave(&txring->fill_lock, flags); - - if (((txring->next_to_fill + pasemi_desc_size(&init_desc)) - - txring->next_to_clean) > TX_RING_SIZE) { - spin_unlock_irqrestore(&txring->fill_lock, flags); - return ERESTART; - } - - if (encini) { - pasemi_ring_add_desc(txring, &init_desc, NULL); - pasemi_ring_incr(sc, ses->chan, - pasemi_desc_size(&init_desc)); - } - - txring->sesn = sesn; - spin_unlock_irqrestore(&txring->fill_lock, flags); - - *sidp = PASEMI_SID(sesn); - return 0; -} - -/* - * Deallocate a session. - */ -static int -pasemi_freesession(device_t dev, u_int64_t tid) -{ - struct pasemi_softc *sc = device_get_softc(dev); - int session; - u_int32_t sid = ((u_int32_t) tid) & 0xffffffff; - - DPRINTF("%s()\n", __FUNCTION__); - - if (sc == NULL) - return -EINVAL; - session = PASEMI_SESSION(sid); - if (session >= sc->sc_nsessions || !sc->sc_sessions[session]) - return -EINVAL; - - pci_unmap_single(sc->dma_pdev, - sc->sc_sessions[session]->dma_addr, - sizeof(struct pasemi_session), DMA_TO_DEVICE); - memset(sc->sc_sessions[session], 0, - sizeof(struct pasemi_session)); - - return 0; -} - -static int -pasemi_process(device_t dev, struct cryptop *crp, int hint) -{ - - int err = 0, ivsize, srclen = 0, reinit = 0, reinit_size = 0, chsel; - struct pasemi_softc *sc = device_get_softc(dev); - struct cryptodesc *crd1, *crd2, *maccrd, *enccrd; - caddr_t ivp; - struct pasemi_desc init_desc, work_desc; - struct pasemi_session *ses; - struct sk_buff *skb; - struct uio *uiop; - unsigned long flags; - struct pasemi_fnu_txring *txring; - - DPRINTF("%s()\n", __FUNCTION__); - - if (crp == NULL || crp->crp_callback == NULL || sc == NULL) - return -EINVAL; - - crp->crp_etype = 0; - if (PASEMI_SESSION(crp->crp_sid) >= sc->sc_nsessions) - return -EINVAL; - - ses = sc->sc_sessions[PASEMI_SESSION(crp->crp_sid)]; - - crd1 = crp->crp_desc; - if (crd1 == NULL) { - err = -EINVAL; - goto errout; - } - crd2 = crd1->crd_next; - - if (ALG_IS_SIG(crd1->crd_alg)) { - maccrd = crd1; - if (crd2 == NULL) - enccrd = NULL; - else if (ALG_IS_CIPHER(crd2->crd_alg) && - (crd2->crd_flags & CRD_F_ENCRYPT) == 0) - enccrd = crd2; - else - goto erralg; - } else if (ALG_IS_CIPHER(crd1->crd_alg)) { - enccrd = crd1; - if (crd2 == NULL) - maccrd = NULL; - else if (ALG_IS_SIG(crd2->crd_alg) && - (crd1->crd_flags & CRD_F_ENCRYPT)) - maccrd = crd2; - else - goto erralg; - } else - goto erralg; - - chsel = ses->chan; - - txring = &sc->tx[chsel]; - - if (enccrd && !maccrd) { - if (enccrd->crd_alg == CRYPTO_ARC4) - reinit = 1; - reinit_size = 0x40; - srclen = crp->crp_ilen; - - pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I - | XCT_FUN_FUN(chsel)); - if (enccrd->crd_flags & CRD_F_ENCRYPT) - pasemi_desc_hdr(&work_desc, XCT_FUN_CRM_ENC); - else - pasemi_desc_hdr(&work_desc, XCT_FUN_CRM_DEC); - } else if (enccrd && maccrd) { - if (enccrd->crd_alg == CRYPTO_ARC4) - reinit = 1; - reinit_size = 0x68; - - if (enccrd->crd_flags & CRD_F_ENCRYPT) { - /* Encrypt -> Authenticate */ - pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_ENC_SIG - | XCT_FUN_A | XCT_FUN_FUN(chsel)); - srclen = maccrd->crd_skip + maccrd->crd_len; - } else { - /* Authenticate -> Decrypt */ - pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_SIG_DEC - | XCT_FUN_24BRES | XCT_FUN_FUN(chsel)); - pasemi_desc_build(&work_desc, 0); - pasemi_desc_build(&work_desc, 0); - pasemi_desc_build(&work_desc, 0); - work_desc.postop = PASEMI_CHECK_SIG; - srclen = crp->crp_ilen; - } - - pasemi_desc_hdr(&work_desc, XCT_FUN_SHL(maccrd->crd_skip / 4)); - pasemi_desc_hdr(&work_desc, XCT_FUN_CHL(enccrd->crd_skip - maccrd->crd_skip)); - } else if (!enccrd && maccrd) { - srclen = maccrd->crd_len; - - pasemi_desc_start(&init_desc, - XCT_CTRL_HDR(chsel, 0x58, DMA_FN_HKEY0)); - pasemi_desc_build(&init_desc, - XCT_FUN_SRC_PTR(0x58, ((struct pasemi_session *)ses->dma_addr)->hkey)); - - pasemi_desc_start(&work_desc, XCT_FUN_O | XCT_FUN_I | XCT_FUN_CRM_SIG - | XCT_FUN_A | XCT_FUN_FUN(chsel)); - } - - if (enccrd) { - switch (enccrd->crd_alg) { - case CRYPTO_3DES_CBC: - pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_3DES | - XCT_FUN_BCM_CBC); - ivsize = sizeof(u64); - break; - case CRYPTO_DES_CBC: - pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_DES | - XCT_FUN_BCM_CBC); - ivsize = sizeof(u64); - break; - case CRYPTO_AES_CBC: - pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_AES | - XCT_FUN_BCM_CBC); - ivsize = 2 * sizeof(u64); - break; - case CRYPTO_ARC4: - pasemi_desc_hdr(&work_desc, XCT_FUN_ALG_ARC); - ivsize = 0; - break; - default: - printk(DRV_NAME ": unimplemented enccrd->crd_alg %d\n", - enccrd->crd_alg); - err = -EINVAL; - goto errout; - } - - ivp = (ivsize == sizeof(u64)) ? (caddr_t) &ses->civ[1] : (caddr_t) &ses->civ[0]; - if (enccrd->crd_flags & CRD_F_ENCRYPT) { - if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) - memcpy(ivp, enccrd->crd_iv, ivsize); - /* If IV is not present in the buffer already, it has to be copied there */ - if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) - crypto_copyback(crp->crp_flags, crp->crp_buf, - enccrd->crd_inject, ivsize, ivp); - } else { - if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) - /* IV is provided expicitly in descriptor */ - memcpy(ivp, enccrd->crd_iv, ivsize); - else - /* IV is provided in the packet */ - crypto_copydata(crp->crp_flags, crp->crp_buf, - enccrd->crd_inject, ivsize, - ivp); - } - } - - if (maccrd) { - switch (maccrd->crd_alg) { - case CRYPTO_MD5: - pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_MD5 | - XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4)); - break; - case CRYPTO_SHA1: - pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_SHA1 | - XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4)); - break; - case CRYPTO_MD5_HMAC: - pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_HMAC_MD5 | - XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4)); - break; - case CRYPTO_SHA1_HMAC: - pasemi_desc_hdr(&work_desc, XCT_FUN_SIG_HMAC_SHA1 | - XCT_FUN_HSZ((crp->crp_ilen - maccrd->crd_inject) / 4)); - break; - default: - printk(DRV_NAME ": unimplemented maccrd->crd_alg %d\n", - maccrd->crd_alg); - err = -EINVAL; - goto errout; - } - } - - if (crp->crp_flags & CRYPTO_F_SKBUF) { - /* using SKB buffers */ - skb = (struct sk_buff *)crp->crp_buf; - if (skb_shinfo(skb)->nr_frags) { - printk(DRV_NAME ": skb frags unimplemented\n"); - err = -EINVAL; - goto errout; - } - pasemi_desc_build( - &work_desc, - XCT_FUN_DST_PTR(skb->len, pci_map_single( - sc->dma_pdev, skb->data, - skb->len, DMA_TO_DEVICE))); - pasemi_desc_build( - &work_desc, - XCT_FUN_SRC_PTR( - srclen, pci_map_single( - sc->dma_pdev, skb->data, - srclen, DMA_TO_DEVICE))); - pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen)); - } else if (crp->crp_flags & CRYPTO_F_IOV) { - /* using IOV buffers */ - uiop = (struct uio *)crp->crp_buf; - if (uiop->uio_iovcnt > 1) { - printk(DRV_NAME ": iov frags unimplemented\n"); - err = -EINVAL; - goto errout; - } - - /* crp_olen is never set; always use crp_ilen */ - pasemi_desc_build( - &work_desc, - XCT_FUN_DST_PTR(crp->crp_ilen, pci_map_single( - sc->dma_pdev, - uiop->uio_iov->iov_base, - crp->crp_ilen, DMA_TO_DEVICE))); - pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen)); - - pasemi_desc_build( - &work_desc, - XCT_FUN_SRC_PTR(srclen, pci_map_single( - sc->dma_pdev, - uiop->uio_iov->iov_base, - srclen, DMA_TO_DEVICE))); - } else { - /* using contig buffers */ - pasemi_desc_build( - &work_desc, - XCT_FUN_DST_PTR(crp->crp_ilen, pci_map_single( - sc->dma_pdev, - crp->crp_buf, - crp->crp_ilen, DMA_TO_DEVICE))); - pasemi_desc_build( - &work_desc, - XCT_FUN_SRC_PTR(srclen, pci_map_single( - sc->dma_pdev, - crp->crp_buf, srclen, - DMA_TO_DEVICE))); - pasemi_desc_hdr(&work_desc, XCT_FUN_LLEN(srclen)); - } - - spin_lock_irqsave(&txring->fill_lock, flags); - - if (txring->sesn != PASEMI_SESSION(crp->crp_sid)) { - txring->sesn = PASEMI_SESSION(crp->crp_sid); - reinit = 1; - } - - if (enccrd) { - pasemi_desc_start(&init_desc, - XCT_CTRL_HDR(chsel, reinit ? reinit_size : 0x10, DMA_FN_CIV0)); - pasemi_desc_build(&init_desc, - XCT_FUN_SRC_PTR(reinit ? reinit_size : 0x10, ses->dma_addr)); - } - - if (((txring->next_to_fill + pasemi_desc_size(&init_desc) + - pasemi_desc_size(&work_desc)) - - txring->next_to_clean) > TX_RING_SIZE) { - spin_unlock_irqrestore(&txring->fill_lock, flags); - err = ERESTART; - goto errout; - } - - pasemi_ring_add_desc(txring, &init_desc, NULL); - pasemi_ring_add_desc(txring, &work_desc, crp); - - pasemi_ring_incr(sc, chsel, - pasemi_desc_size(&init_desc) + - pasemi_desc_size(&work_desc)); - - spin_unlock_irqrestore(&txring->fill_lock, flags); - - mod_timer(&txring->crypto_timer, jiffies + TIMER_INTERVAL); - - return 0; - -erralg: - printk(DRV_NAME ": unsupported algorithm or algorithm order alg1 %d alg2 %d\n", - crd1->crd_alg, crd2->crd_alg); - err = -EINVAL; - -errout: - if (err != ERESTART) { - crp->crp_etype = err; - crypto_done(crp); - } - return err; -} - -static int pasemi_clean_tx(struct pasemi_softc *sc, int chan) -{ - int i, j, ring_idx; - struct pasemi_fnu_txring *ring = &sc->tx[chan]; - u16 delta_cnt; - int flags, loops = 10; - int desc_size; - struct cryptop *crp; - - spin_lock_irqsave(&ring->clean_lock, flags); - - while ((delta_cnt = (dma_status->tx_sta[sc->base_chan + chan] - & PAS_STATUS_PCNT_M) - ring->total_pktcnt) - && loops--) { - - for (i = 0; i < delta_cnt; i++) { - desc_size = TX_DESC_INFO(ring, ring->next_to_clean).desc_size; - crp = TX_DESC_INFO(ring, ring->next_to_clean).cf_crp; - if (crp) { - ring_idx = 2 * (ring->next_to_clean & (TX_RING_SIZE-1)); - if (TX_DESC_INFO(ring, ring->next_to_clean).desc_postop & PASEMI_CHECK_SIG) { - /* Need to make sure signature matched, - * if not - return error */ - if (!(ring->desc[ring_idx + 1] & (1ULL << 63))) - crp->crp_etype = -EINVAL; - } - crypto_done(TX_DESC_INFO(ring, - ring->next_to_clean).cf_crp); - TX_DESC_INFO(ring, ring->next_to_clean).cf_crp = NULL; - pci_unmap_single( - sc->dma_pdev, - XCT_PTR_ADDR_LEN(ring->desc[ring_idx + 1]), - PCI_DMA_TODEVICE); - - ring->desc[ring_idx] = ring->desc[ring_idx + 1] = 0; - - ring->next_to_clean++; - for (j = 1; j < desc_size; j++) { - ring_idx = 2 * - (ring->next_to_clean & - (TX_RING_SIZE-1)); - pci_unmap_single( - sc->dma_pdev, - XCT_PTR_ADDR_LEN(ring->desc[ring_idx]), - PCI_DMA_TODEVICE); - if (ring->desc[ring_idx + 1]) - pci_unmap_single( - sc->dma_pdev, - XCT_PTR_ADDR_LEN( - ring->desc[ - ring_idx + 1]), - PCI_DMA_TODEVICE); - ring->desc[ring_idx] = - ring->desc[ring_idx + 1] = 0; - ring->next_to_clean++; - } - } else { - for (j = 0; j < desc_size; j++) { - ring_idx = 2 * (ring->next_to_clean & (TX_RING_SIZE-1)); - ring->desc[ring_idx] = - ring->desc[ring_idx + 1] = 0; - ring->next_to_clean++; - } - } - } - - ring->total_pktcnt += delta_cnt; - } - spin_unlock_irqrestore(&ring->clean_lock, flags); - - return 0; -} - -static void sweepup_tx(struct pasemi_softc *sc) -{ - int i; - - for (i = 0; i < sc->sc_num_channels; i++) - pasemi_clean_tx(sc, i); -} - -static irqreturn_t pasemi_intr(int irq, void *arg, struct pt_regs *regs) -{ - struct pasemi_softc *sc = arg; - unsigned int reg; - int chan = irq - sc->base_irq; - int chan_index = sc->base_chan + chan; - u64 stat = dma_status->tx_sta[chan_index]; - - DPRINTF("%s()\n", __FUNCTION__); - - if (!(stat & PAS_STATUS_CAUSE_M)) - return IRQ_NONE; - - pasemi_clean_tx(sc, chan); - - stat = dma_status->tx_sta[chan_index]; - - reg = PAS_IOB_DMA_TXCH_RESET_PINTC | - PAS_IOB_DMA_TXCH_RESET_PCNT(sc->tx[chan].total_pktcnt); - - if (stat & PAS_STATUS_SOFT) - reg |= PAS_IOB_DMA_RXCH_RESET_SINTC; - - out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_RESET(chan_index), reg); - - - return IRQ_HANDLED; -} - -static int pasemi_dma_setup_tx_resources(struct pasemi_softc *sc, int chan) -{ - u32 val; - int chan_index = chan + sc->base_chan; - int ret; - struct pasemi_fnu_txring *ring; - - ring = &sc->tx[chan]; - - spin_lock_init(&ring->fill_lock); - spin_lock_init(&ring->clean_lock); - - ring->desc_info = kzalloc(sizeof(struct pasemi_desc_info) * - TX_RING_SIZE, GFP_KERNEL); - if (!ring->desc_info) - return -ENOMEM; - - /* Allocate descriptors */ - ring->desc = dma_alloc_coherent(&sc->dma_pdev->dev, - TX_RING_SIZE * - 2 * sizeof(u64), - &ring->dma, GFP_KERNEL); - if (!ring->desc) - return -ENOMEM; - - memset((void *) ring->desc, 0, TX_RING_SIZE * 2 * sizeof(u64)); - - out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_RESET(chan_index), 0x30); - - ring->total_pktcnt = 0; - - out_le32(sc->dma_regs + PAS_DMA_TXCHAN_BASEL(chan_index), - PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma)); - - val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32); - val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2); - - out_le32(sc->dma_regs + PAS_DMA_TXCHAN_BASEU(chan_index), val); - - out_le32(sc->dma_regs + PAS_DMA_TXCHAN_CFG(chan_index), - PAS_DMA_TXCHAN_CFG_TY_FUNC | - PAS_DMA_TXCHAN_CFG_TATTR(chan) | - PAS_DMA_TXCHAN_CFG_WT(2)); - - /* enable tx channel */ - out_le32(sc->dma_regs + - PAS_DMA_TXCHAN_TCMDSTA(chan_index), - PAS_DMA_TXCHAN_TCMDSTA_EN); - - out_le32(sc->iob_regs + PAS_IOB_DMA_TXCH_CFG(chan_index), - PAS_IOB_DMA_TXCH_CFG_CNTTH(1000)); - - ring->next_to_fill = 0; - ring->next_to_clean = 0; - - snprintf(ring->irq_name, sizeof(ring->irq_name), - "%s%d", "crypto", chan); - - ring->irq = irq_create_mapping(NULL, sc->base_irq + chan); - ret = request_irq(ring->irq, (irq_handler_t) - pasemi_intr, IRQF_DISABLED, ring->irq_name, sc); - if (ret) { - printk(KERN_ERR DRV_NAME ": failed to hook irq %d ret %d\n", - ring->irq, ret); - ring->irq = -1; - return ret; - } - - setup_timer(&ring->crypto_timer, (void *) sweepup_tx, (unsigned long) sc); - - return 0; -} - -static device_method_t pasemi_methods = { - /* crypto device methods */ - DEVMETHOD(cryptodev_newsession, pasemi_newsession), - DEVMETHOD(cryptodev_freesession, pasemi_freesession), - DEVMETHOD(cryptodev_process, pasemi_process), -}; - -/* Set up the crypto device structure, private data, - * and anything else we need before we start */ - -static int __devinit -pasemi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - struct pasemi_softc *sc; - int ret, i; - - DPRINTF(KERN_ERR "%s()\n", __FUNCTION__); - - sc = kzalloc(sizeof(*sc), GFP_KERNEL); - if (!sc) - return -ENOMEM; - - softc_device_init(sc, DRV_NAME, 1, pasemi_methods); - - pci_set_drvdata(pdev, sc); - - spin_lock_init(&sc->sc_chnlock); - - sc->sc_sessions = (struct pasemi_session **) - kzalloc(PASEMI_INITIAL_SESSIONS * - sizeof(struct pasemi_session *), GFP_ATOMIC); - if (sc->sc_sessions == NULL) { - ret = -ENOMEM; - goto out; - } - - sc->sc_nsessions = PASEMI_INITIAL_SESSIONS; - sc->sc_lastchn = 0; - sc->base_irq = pdev->irq + 6; - sc->base_chan = 6; - sc->sc_cid = -1; - sc->dma_pdev = pdev; - - sc->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); - if (!sc->iob_pdev) { - dev_err(&pdev->dev, "Can't find I/O Bridge\n"); - ret = -ENODEV; - goto out; - } - - /* This is hardcoded and ugly, but we have some firmware versions - * who don't provide the register space in the device tree. Luckily - * they are at well-known locations so we can just do the math here. - */ - sc->dma_regs = - ioremap(0xe0000000 + (sc->dma_pdev->devfn << 12), 0x2000); - sc->iob_regs = - ioremap(0xe0000000 + (sc->iob_pdev->devfn << 12), 0x2000); - if (!sc->dma_regs || !sc->iob_regs) { - dev_err(&pdev->dev, "Can't map registers\n"); - ret = -ENODEV; - goto out; - } - - dma_status = __ioremap(0xfd800000, 0x1000, 0); - if (!dma_status) { - ret = -ENODEV; - dev_err(&pdev->dev, "Can't map dmastatus space\n"); - goto out; - } - - sc->tx = (struct pasemi_fnu_txring *) - kzalloc(sizeof(struct pasemi_fnu_txring) - * 8, GFP_KERNEL); - if (!sc->tx) { - ret = -ENOMEM; - goto out; - } - - /* Initialize the h/w */ - out_le32(sc->dma_regs + PAS_DMA_COM_CFG, - (in_le32(sc->dma_regs + PAS_DMA_COM_CFG) | - PAS_DMA_COM_CFG_FWF)); - out_le32(sc->dma_regs + PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN); - - for (i = 0; i < PASEMI_FNU_CHANNELS; i++) { - sc->sc_num_channels++; - ret = pasemi_dma_setup_tx_resources(sc, i); - if (ret) - goto out; - } - - sc->sc_cid = crypto_get_driverid(softc_get_device(sc), - CRYPTOCAP_F_HARDWARE); - if (sc->sc_cid < 0) { - printk(KERN_ERR DRV_NAME ": could not get crypto driver id\n"); - ret = -ENXIO; - goto out; - } - - /* register algorithms with the framework */ - printk(DRV_NAME ":"); - - crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_ARC4, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); - crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); - - return 0; - -out: - pasemi_dma_remove(pdev); - return ret; -} - -#define MAX_RETRIES 5000 - -static void pasemi_free_tx_resources(struct pasemi_softc *sc, int chan) -{ - struct pasemi_fnu_txring *ring = &sc->tx[chan]; - int chan_index = chan + sc->base_chan; - int retries; - u32 stat; - - /* Stop the channel */ - out_le32(sc->dma_regs + - PAS_DMA_TXCHAN_TCMDSTA(chan_index), - PAS_DMA_TXCHAN_TCMDSTA_ST); - - for (retries = 0; retries < MAX_RETRIES; retries++) { - stat = in_le32(sc->dma_regs + - PAS_DMA_TXCHAN_TCMDSTA(chan_index)); - if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)) - break; - cond_resched(); - } - - if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT) - dev_err(&sc->dma_pdev->dev, "Failed to stop tx channel %d\n", - chan_index); - - /* Disable the channel */ - out_le32(sc->dma_regs + - PAS_DMA_TXCHAN_TCMDSTA(chan_index), - 0); - - if (ring->desc_info) - kfree((void *) ring->desc_info); - if (ring->desc) - dma_free_coherent(&sc->dma_pdev->dev, - TX_RING_SIZE * - 2 * sizeof(u64), - (void *) ring->desc, ring->dma); - if (ring->irq != -1) - free_irq(ring->irq, sc); - - del_timer(&ring->crypto_timer); -} - -static void __devexit pasemi_dma_remove(struct pci_dev *pdev) -{ - struct pasemi_softc *sc = pci_get_drvdata(pdev); - int i; - - DPRINTF("%s()\n", __FUNCTION__); - - if (sc->sc_cid >= 0) { - crypto_unregister_all(sc->sc_cid); - } - - if (sc->tx) { - for (i = 0; i < sc->sc_num_channels; i++) - pasemi_free_tx_resources(sc, i); - - kfree(sc->tx); - } - if (sc->sc_sessions) { - for (i = 0; i < sc->sc_nsessions; i++) - kfree(sc->sc_sessions[i]); - kfree(sc->sc_sessions); - } - if (sc->iob_pdev) - pci_dev_put(sc->iob_pdev); - if (sc->dma_regs) - iounmap(sc->dma_regs); - if (sc->iob_regs) - iounmap(sc->iob_regs); - kfree(sc); -} - -static struct pci_device_id pasemi_dma_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa007) }, -}; - -MODULE_DEVICE_TABLE(pci, pasemi_dma_pci_tbl); - -static struct pci_driver pasemi_dma_driver = { - .name = "pasemi_dma", - .id_table = pasemi_dma_pci_tbl, - .probe = pasemi_dma_probe, - .remove = __devexit_p(pasemi_dma_remove), -}; - -static void __exit pasemi_dma_cleanup_module(void) -{ - pci_unregister_driver(&pasemi_dma_driver); - __iounmap(dma_status); - dma_status = NULL; -} - -int pasemi_dma_init_module(void) -{ - return pci_register_driver(&pasemi_dma_driver); -} - -module_init(pasemi_dma_init_module); -module_exit(pasemi_dma_cleanup_module); - -MODULE_LICENSE("Dual BSD/GPL"); -MODULE_AUTHOR("Egor Martovetsky egor@pasemi.com"); -MODULE_DESCRIPTION("OCF driver for PA Semi PWRficient DMA Crypto Engine"); |