mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-09 04:05:19 +02:00
1010 lines
26 KiB
C
1010 lines
26 KiB
C
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/*
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* Copyright (C) 2007 PA Semi, Inc
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*
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* Driver for the PA Semi PWRficient DMA Crypto Engine
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef AUTOCONF_INCLUDED
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#include <linux/config.h>
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#endif
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/random.h>
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#include <linux/skbuff.h>
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#include <asm/scatterlist.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include <cryptodev.h>
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#include <uio.h>
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#include "pasemi_fnu.h"
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#define DRV_NAME "pasemi"
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#define TIMER_INTERVAL 1000
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static void __devexit pasemi_dma_remove(struct pci_dev *pdev);
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static struct pasdma_status volatile * dma_status;
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Enable debug");
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static void pasemi_desc_start(struct pasemi_desc *desc, u64 hdr)
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{
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desc->postop = 0;
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desc->quad[0] = hdr;
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desc->quad_cnt = 1;
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desc->size = 1;
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}
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static void pasemi_desc_build(struct pasemi_desc *desc, u64 val)
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{
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desc->quad[desc->quad_cnt++] = val;
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desc->size = (desc->quad_cnt + 1) / 2;
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}
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static void pasemi_desc_hdr(struct pasemi_desc *desc, u64 hdr)
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{
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desc->quad[0] |= hdr;
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}
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static int pasemi_desc_size(struct pasemi_desc *desc)
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{
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return desc->size;
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}
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static void pasemi_ring_add_desc(
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struct pasemi_fnu_txring *ring,
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struct pasemi_desc *desc,
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struct cryptop *crp) {
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int i;
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int ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1));
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TX_DESC_INFO(ring, ring->next_to_fill).desc_size = desc->size;
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TX_DESC_INFO(ring, ring->next_to_fill).desc_postop = desc->postop;
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TX_DESC_INFO(ring, ring->next_to_fill).cf_crp = crp;
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for (i = 0; i < desc->quad_cnt; i += 2) {
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ring_index = 2 * (ring->next_to_fill & (TX_RING_SIZE-1));
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ring->desc[ring_index] = desc->quad[i];
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ring->desc[ring_index + 1] = desc->quad[i + 1];
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ring->next_to_fill++;
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}
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if (desc->quad_cnt & 1)
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ring->desc[ring_index + 1] = 0;
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}
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static void pasemi_ring_incr(struct pasemi_softc *sc, int chan_index, int incr)
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{
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out_le32(sc->dma_regs + PAS_DMA_TXCHAN_INCR(sc->base_chan + chan_index),
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incr);
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}
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/*
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* Generate a new software session.
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*/
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static int
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pasemi_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
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{
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struct cryptoini *c, *encini = NULL, *macini = NULL;
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struct pasemi_softc *sc = device_get_softc(dev);
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struct pasemi_session *ses = NULL, **sespp;
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int sesn, blksz = 0;
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u64 ccmd = 0;
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unsigned long flags;
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struct pasemi_desc init_desc;
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struct pasemi_fnu_txring *txring;
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DPRINTF("%s()\n", __FUNCTION__);
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if (sidp == NULL || cri == NULL || sc == NULL) {
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DPRINTF("%s,%d - EINVAL\n", __FILE__, __LINE__);
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return -EINVAL;
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}
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for (c = cri; c != NULL; c = c->cri_next) {
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if (ALG_IS_SIG(c->cri_alg)) {
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if (macini)
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return -EINVAL;
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macini = c;
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} else if (ALG_IS_CIPHER(c->cri_alg)) {
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if (encini)
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return -EINVAL;
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encini = c;
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} else {
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DPRINTF("UNKNOWN c->cri_alg %d\n", c->cri_alg);
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return -EINVAL;
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}
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}
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if (encini == NULL && macini == NULL)
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return -EINVAL;
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if (encini) {
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/* validate key length */
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switch (encini->cri_alg) {
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case CRYPTO_DES_CBC:
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if (encini->cri_klen != 64)
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return -EINVAL;
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ccmd = DMA_CALGO_DES;
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break;
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case CRYPTO_3DES_CBC:
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if (encini->cri_klen != 192)
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return -EINVAL;
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ccmd = DMA_CALGO_3DES;
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break;
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case CRYPTO_AES_CBC:
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if (encini->cri_klen != 128 &&
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encini->cri_klen != 192 &&
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encini->cri_klen != 256)
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return -EINVAL;
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ccmd = DMA_CALGO_AES;
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break;
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case CRYPTO_ARC4:
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if (encini->cri_klen != 128)
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return -EINVAL;
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ccmd = DMA_CALGO_ARC;
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break;
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default:
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DPRINTF("UNKNOWN encini->cri_alg %d\n",
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encini->cri_alg);
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return -EINVAL;
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}
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}
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if (macini) {
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switch (macini->cri_alg) {
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case CRYPTO_MD5:
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case CRYPTO_MD5_HMAC:
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blksz = 16;
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break;
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case CRYPTO_SHA1:
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case CRYPTO_SHA1_HMAC:
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blksz = 20;
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break;
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default:
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DPRINTF("UNKNOWN macini->cri_alg %d\n",
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macini->cri_alg);
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return -EINVAL;
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}
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if (((macini->cri_klen + 7) / 8) > blksz) {
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DPRINTF("key length %d bigger than blksize %d not supported\n",
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((macini->cri_klen + 7) / 8), blksz);
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return -EINVAL;
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}
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}
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for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
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if (sc->sc_sessions[sesn] == NULL) {
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sc->sc_sessions[sesn] = (struct pasemi_session *)
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kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC);
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ses = sc->sc_sessions[sesn];
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break;
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} else if (sc->sc_sessions[sesn]->used == 0) {
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ses = sc->sc_sessions[sesn];
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break;
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}
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}
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if (ses == NULL) {
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sespp = (struct pasemi_session **)
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kzalloc(sc->sc_nsessions * 2 *
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sizeof(struct pasemi_session *), GFP_ATOMIC);
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if (sespp == NULL)
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return -ENOMEM;
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memcpy(sespp, sc->sc_sessions,
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sc->sc_nsessions * sizeof(struct pasemi_session *));
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kfree(sc->sc_sessions);
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sc->sc_sessions = sespp;
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sesn = sc->sc_nsessions;
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ses = sc->sc_sessions[sesn] = (struct pasemi_session *)
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kzalloc(sizeof(struct pasemi_session), GFP_ATOMIC);
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if (ses == NULL)
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return -ENOMEM;
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sc->sc_nsessions *= 2;
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}
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ses->used = 1;
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ses->dma_addr = pci_map_single(sc->dma_pdev, (void *) ses->civ,
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sizeof(struct pasemi_session), DMA_TO_DEVICE);
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/* enter the channel scheduler */
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spin_lock_irqsave(&sc->sc_chnlock, flags);
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/* ARC4 has to be processed by the even channel */
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if (encini && (encini->cri_alg == CRYPTO_ARC4))
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ses->chan = sc->sc_lastchn & ~1;
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else
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ses->chan = sc->sc_lastchn;
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sc->sc_lastchn = (sc->sc_lastchn + 1) % sc->sc_num_channels;
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spin_unlock_irqrestore(&sc->sc_chnlock, flags);
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txring = &sc->tx[ses->chan];
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if (encini) {
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ses->ccmd = ccmd;
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/* get an IV */
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/* XXX may read fewer than requested */
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get_random_bytes(ses->civ, sizeof(ses->civ));
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ses->keysz = (encini->cri_klen - 63) / 64;
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memcpy(ses->key, encini->cri_key, (ses->keysz + 1) * 8);
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pasemi_desc_start(&init_desc,
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XCT_CTRL_HDR(ses->chan, (encini && macini) ? 0x68 : 0x40, DMA_FN_CIV0));
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pasemi_desc_build(&init_desc,
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XCT_FUN_SRC_PTR((encini && macini) ? 0x68 : 0x40, ses->dma_addr));
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}
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if (macini) {
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if (macini->cri_alg == CRYPTO_MD5_HMAC ||
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macini->cri_alg == CRYPTO_SHA1_HMAC)
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memcpy(ses->hkey, macini->cri_key, blksz);
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else {
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/* Load initialization constants(RFC 1321, 3174) */
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ses->hiv[0] = 0x67452301efcdab89ULL;
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ses->hiv[1] = 0x98badcfe10325476ULL;
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ses->hiv[2] = 0xc3d2e1f000000000ULL;
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}
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ses->hseq = 0ULL;
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}
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spin_lock_irqsave(&txring->fill_lock, flags);
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if (((txring->next_to_fill + pasemi_desc_size(&init_desc)) -
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txring->next_to_clean) > TX_RING_SIZE) {
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spin_unlock_irqrestore(&txring->fill_lock, flags);
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return ERESTART;
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}
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if (encini) {
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pasemi_ring_add_desc(txring, &init_desc, NULL);
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pasemi_ring_incr(sc, ses->chan,
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pasemi_desc_size(&init_desc));
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}
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|
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txring->sesn = sesn;
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spin_unlock_irqrestore(&txring->fill_lock, flags);
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|
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*sidp = PASEMI_SID(sesn);
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return 0;
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}
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|
|
||
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/*
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* Deallocate a session.
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*/
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static int
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pasemi_freesession(device_t dev, u_int64_t tid)
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{
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struct pasemi_softc *sc = device_get_softc(dev);
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int session;
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u_int32_t sid = ((u_int32_t) tid) & 0xffffffff;
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|
|
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DPRINTF("%s()\n", __FUNCTION__);
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|
|
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if (sc == NULL)
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return -EINVAL;
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session = PASEMI_SESSION(sid);
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if (session >= sc->sc_nsessions || !sc->sc_sessions[session])
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return -EINVAL;
|
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|
|
||
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pci_unmap_single(sc->dma_pdev,
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sc->sc_sessions[session]->dma_addr,
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sizeof(struct pasemi_session), DMA_TO_DEVICE);
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memset(sc->sc_sessions[session], 0,
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sizeof(struct pasemi_session));
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|
|
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return 0;
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}
|
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|
|
||
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static int
|
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pasemi_process(device_t dev, struct cryptop *crp, int hint)
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{
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|
|
||
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int err = 0, ivsize, srclen = 0, reinit = 0, reinit_size = 0, chsel;
|
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struct pasemi_softc *sc = device_get_softc(dev);
|
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struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
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caddr_t ivp;
|
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struct pasemi_desc init_desc, work_desc;
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struct pasemi_session *ses;
|
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struct sk_buff *skb;
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struct uio *uiop;
|
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unsigned long flags;
|
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|
struct pasemi_fnu_txring *txring;
|
||
|
|
||
|
DPRINTF("%s()\n", __FUNCTION__);
|
||
|
|
||
|
if (crp == NULL || crp->crp_callback == NULL || sc == NULL)
|
||
|
return -EINVAL;
|
||
|
|
||
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crp->crp_etype = 0;
|
||
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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");
|