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freebsd-skq/sys/dev/cesa/cesa.c
pfg 1537078d8f sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2009-2011 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* CESA SRAM Memory Map:
*
* +------------------------+ <= sc->sc_sram_base_va + CESA_SRAM_SIZE
* | |
* | DATA |
* | |
* +------------------------+ <= sc->sc_sram_base_va + CESA_DATA(0)
* | struct cesa_sa_data |
* +------------------------+
* | struct cesa_sa_hdesc |
* +------------------------+ <= sc->sc_sram_base_va
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/resource.h>
#include <machine/fdt.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <sys/md5.h>
#include <crypto/sha1.h>
#include <crypto/sha2/sha256.h>
#include <crypto/rijndael/rijndael.h>
#include <opencrypto/cryptodev.h>
#include "cryptodev_if.h"
#include <arm/mv/mvreg.h>
#include <arm/mv/mvvar.h>
#include "cesa.h"
static int cesa_probe(device_t);
static int cesa_attach(device_t);
static int cesa_detach(device_t);
static void cesa_intr(void *);
static int cesa_newsession(device_t, u_int32_t *, struct cryptoini *);
static int cesa_freesession(device_t, u_int64_t);
static int cesa_process(device_t, struct cryptop *, int);
static struct resource_spec cesa_res_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_MEMORY, 1, RF_ACTIVE },
{ SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0 }
};
static device_method_t cesa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, cesa_probe),
DEVMETHOD(device_attach, cesa_attach),
DEVMETHOD(device_detach, cesa_detach),
/* Crypto device methods */
DEVMETHOD(cryptodev_newsession, cesa_newsession),
DEVMETHOD(cryptodev_freesession,cesa_freesession),
DEVMETHOD(cryptodev_process, cesa_process),
DEVMETHOD_END
};
static driver_t cesa_driver = {
"cesa",
cesa_methods,
sizeof (struct cesa_softc)
};
static devclass_t cesa_devclass;
DRIVER_MODULE(cesa, simplebus, cesa_driver, cesa_devclass, 0, 0);
MODULE_DEPEND(cesa, crypto, 1, 1, 1);
static void
cesa_dump_cshd(struct cesa_softc *sc, struct cesa_sa_hdesc *cshd)
{
#ifdef DEBUG
device_t dev;
dev = sc->sc_dev;
device_printf(dev, "CESA SA Hardware Descriptor:\n");
device_printf(dev, "\t\tconfig: 0x%08X\n", cshd->cshd_config);
device_printf(dev, "\t\te_src: 0x%08X\n", cshd->cshd_enc_src);
device_printf(dev, "\t\te_dst: 0x%08X\n", cshd->cshd_enc_dst);
device_printf(dev, "\t\te_dlen: 0x%08X\n", cshd->cshd_enc_dlen);
device_printf(dev, "\t\te_key: 0x%08X\n", cshd->cshd_enc_key);
device_printf(dev, "\t\te_iv_1: 0x%08X\n", cshd->cshd_enc_iv);
device_printf(dev, "\t\te_iv_2: 0x%08X\n", cshd->cshd_enc_iv_buf);
device_printf(dev, "\t\tm_src: 0x%08X\n", cshd->cshd_mac_src);
device_printf(dev, "\t\tm_dst: 0x%08X\n", cshd->cshd_mac_dst);
device_printf(dev, "\t\tm_dlen: 0x%08X\n", cshd->cshd_mac_dlen);
device_printf(dev, "\t\tm_tlen: 0x%08X\n", cshd->cshd_mac_total_dlen);
device_printf(dev, "\t\tm_iv_i: 0x%08X\n", cshd->cshd_mac_iv_in);
device_printf(dev, "\t\tm_iv_o: 0x%08X\n", cshd->cshd_mac_iv_out);
#endif
}
static void
cesa_alloc_dma_mem_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct cesa_dma_mem *cdm;
if (error)
return;
KASSERT(nseg == 1, ("Got wrong number of DMA segments, should be 1."));
cdm = arg;
cdm->cdm_paddr = segs->ds_addr;
}
static int
cesa_alloc_dma_mem(struct cesa_softc *sc, struct cesa_dma_mem *cdm,
bus_size_t size)
{
int error;
KASSERT(cdm->cdm_vaddr == NULL,
("%s(): DMA memory descriptor in use.", __func__));
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */
PAGE_SIZE, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
size, 1, /* maxsize, nsegments */
size, 0, /* maxsegsz, flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&cdm->cdm_tag); /* dmat */
if (error) {
device_printf(sc->sc_dev, "failed to allocate busdma tag, error"
" %i!\n", error);
goto err1;
}
error = bus_dmamem_alloc(cdm->cdm_tag, &cdm->cdm_vaddr,
BUS_DMA_NOWAIT | BUS_DMA_ZERO, &cdm->cdm_map);
if (error) {
device_printf(sc->sc_dev, "failed to allocate DMA safe"
" memory, error %i!\n", error);
goto err2;
}
error = bus_dmamap_load(cdm->cdm_tag, cdm->cdm_map, cdm->cdm_vaddr,
size, cesa_alloc_dma_mem_cb, cdm, BUS_DMA_NOWAIT);
if (error) {
device_printf(sc->sc_dev, "cannot get address of the DMA"
" memory, error %i\n", error);
goto err3;
}
return (0);
err3:
bus_dmamem_free(cdm->cdm_tag, cdm->cdm_vaddr, cdm->cdm_map);
err2:
bus_dma_tag_destroy(cdm->cdm_tag);
err1:
cdm->cdm_vaddr = NULL;
return (error);
}
static void
cesa_free_dma_mem(struct cesa_dma_mem *cdm)
{
bus_dmamap_unload(cdm->cdm_tag, cdm->cdm_map);
bus_dmamem_free(cdm->cdm_tag, cdm->cdm_vaddr, cdm->cdm_map);
bus_dma_tag_destroy(cdm->cdm_tag);
cdm->cdm_vaddr = NULL;
}
static void
cesa_sync_dma_mem(struct cesa_dma_mem *cdm, bus_dmasync_op_t op)
{
/* Sync only if dma memory is valid */
if (cdm->cdm_vaddr != NULL)
bus_dmamap_sync(cdm->cdm_tag, cdm->cdm_map, op);
}
static void
cesa_sync_desc(struct cesa_softc *sc, bus_dmasync_op_t op)
{
cesa_sync_dma_mem(&sc->sc_tdesc_cdm, op);
cesa_sync_dma_mem(&sc->sc_sdesc_cdm, op);
cesa_sync_dma_mem(&sc->sc_requests_cdm, op);
}
static struct cesa_session *
cesa_alloc_session(struct cesa_softc *sc)
{
struct cesa_session *cs;
CESA_GENERIC_ALLOC_LOCKED(sc, cs, sessions);
return (cs);
}
static struct cesa_session *
cesa_get_session(struct cesa_softc *sc, uint32_t sid)
{
if (sid >= CESA_SESSIONS)
return (NULL);
return (&sc->sc_sessions[sid]);
}
static void
cesa_free_session(struct cesa_softc *sc, struct cesa_session *cs)
{
CESA_GENERIC_FREE_LOCKED(sc, cs, sessions);
}
static struct cesa_request *
cesa_alloc_request(struct cesa_softc *sc)
{
struct cesa_request *cr;
CESA_GENERIC_ALLOC_LOCKED(sc, cr, requests);
if (!cr)
return (NULL);
STAILQ_INIT(&cr->cr_tdesc);
STAILQ_INIT(&cr->cr_sdesc);
return (cr);
}
static void
cesa_free_request(struct cesa_softc *sc, struct cesa_request *cr)
{
/* Free TDMA descriptors assigned to this request */
CESA_LOCK(sc, tdesc);
STAILQ_CONCAT(&sc->sc_free_tdesc, &cr->cr_tdesc);
CESA_UNLOCK(sc, tdesc);
/* Free SA descriptors assigned to this request */
CESA_LOCK(sc, sdesc);
STAILQ_CONCAT(&sc->sc_free_sdesc, &cr->cr_sdesc);
CESA_UNLOCK(sc, sdesc);
/* Unload DMA memory associated with request */
if (cr->cr_dmap_loaded) {
bus_dmamap_unload(sc->sc_data_dtag, cr->cr_dmap);
cr->cr_dmap_loaded = 0;
}
CESA_GENERIC_FREE_LOCKED(sc, cr, requests);
}
static void
cesa_enqueue_request(struct cesa_softc *sc, struct cesa_request *cr)
{
CESA_LOCK(sc, requests);
STAILQ_INSERT_TAIL(&sc->sc_ready_requests, cr, cr_stq);
CESA_UNLOCK(sc, requests);
}
static struct cesa_tdma_desc *
cesa_alloc_tdesc(struct cesa_softc *sc)
{
struct cesa_tdma_desc *ctd;
CESA_GENERIC_ALLOC_LOCKED(sc, ctd, tdesc);
if (!ctd)
device_printf(sc->sc_dev, "TDMA descriptors pool exhaused. "
"Consider increasing CESA_TDMA_DESCRIPTORS.\n");
return (ctd);
}
static struct cesa_sa_desc *
cesa_alloc_sdesc(struct cesa_softc *sc, struct cesa_request *cr)
{
struct cesa_sa_desc *csd;
CESA_GENERIC_ALLOC_LOCKED(sc, csd, sdesc);
if (!csd) {
device_printf(sc->sc_dev, "SA descriptors pool exhaused. "
"Consider increasing CESA_SA_DESCRIPTORS.\n");
return (NULL);
}
STAILQ_INSERT_TAIL(&cr->cr_sdesc, csd, csd_stq);
/* Fill-in SA descriptor with default values */
csd->csd_cshd->cshd_enc_key = CESA_SA_DATA(csd_key);
csd->csd_cshd->cshd_enc_iv = CESA_SA_DATA(csd_iv);
csd->csd_cshd->cshd_enc_iv_buf = CESA_SA_DATA(csd_iv);
csd->csd_cshd->cshd_enc_src = 0;
csd->csd_cshd->cshd_enc_dst = 0;
csd->csd_cshd->cshd_enc_dlen = 0;
csd->csd_cshd->cshd_mac_dst = CESA_SA_DATA(csd_hash);
csd->csd_cshd->cshd_mac_iv_in = CESA_SA_DATA(csd_hiv_in);
csd->csd_cshd->cshd_mac_iv_out = CESA_SA_DATA(csd_hiv_out);
csd->csd_cshd->cshd_mac_src = 0;
csd->csd_cshd->cshd_mac_dlen = 0;
return (csd);
}
static struct cesa_tdma_desc *
cesa_tdma_copy(struct cesa_softc *sc, bus_addr_t dst, bus_addr_t src,
bus_size_t size)
{
struct cesa_tdma_desc *ctd;
ctd = cesa_alloc_tdesc(sc);
if (!ctd)
return (NULL);
ctd->ctd_cthd->cthd_dst = dst;
ctd->ctd_cthd->cthd_src = src;
ctd->ctd_cthd->cthd_byte_count = size;
/* Handle special control packet */
if (size != 0)
ctd->ctd_cthd->cthd_flags = CESA_CTHD_OWNED;
else
ctd->ctd_cthd->cthd_flags = 0;
return (ctd);
}
static struct cesa_tdma_desc *
cesa_tdma_copyin_sa_data(struct cesa_softc *sc, struct cesa_request *cr)
{
return (cesa_tdma_copy(sc, sc->sc_sram_base_pa +
sizeof(struct cesa_sa_hdesc), cr->cr_csd_paddr,
sizeof(struct cesa_sa_data)));
}
static struct cesa_tdma_desc *
cesa_tdma_copyout_sa_data(struct cesa_softc *sc, struct cesa_request *cr)
{
return (cesa_tdma_copy(sc, cr->cr_csd_paddr, sc->sc_sram_base_pa +
sizeof(struct cesa_sa_hdesc), sizeof(struct cesa_sa_data)));
}
static struct cesa_tdma_desc *
cesa_tdma_copy_sdesc(struct cesa_softc *sc, struct cesa_sa_desc *csd)
{
return (cesa_tdma_copy(sc, sc->sc_sram_base_pa, csd->csd_cshd_paddr,
sizeof(struct cesa_sa_hdesc)));
}
static void
cesa_append_tdesc(struct cesa_request *cr, struct cesa_tdma_desc *ctd)
{
struct cesa_tdma_desc *ctd_prev;
if (!STAILQ_EMPTY(&cr->cr_tdesc)) {
ctd_prev = STAILQ_LAST(&cr->cr_tdesc, cesa_tdma_desc, ctd_stq);
ctd_prev->ctd_cthd->cthd_next = ctd->ctd_cthd_paddr;
}
ctd->ctd_cthd->cthd_next = 0;
STAILQ_INSERT_TAIL(&cr->cr_tdesc, ctd, ctd_stq);
}
static int
cesa_append_packet(struct cesa_softc *sc, struct cesa_request *cr,
struct cesa_packet *cp, struct cesa_sa_desc *csd)
{
struct cesa_tdma_desc *ctd, *tmp;
/* Copy SA descriptor for this packet */
ctd = cesa_tdma_copy_sdesc(sc, csd);
if (!ctd)
return (ENOMEM);
cesa_append_tdesc(cr, ctd);
/* Copy data to be processed */
STAILQ_FOREACH_SAFE(ctd, &cp->cp_copyin, ctd_stq, tmp)
cesa_append_tdesc(cr, ctd);
STAILQ_INIT(&cp->cp_copyin);
/* Insert control descriptor */
ctd = cesa_tdma_copy(sc, 0, 0, 0);
if (!ctd)
return (ENOMEM);
cesa_append_tdesc(cr, ctd);
/* Copy back results */
STAILQ_FOREACH_SAFE(ctd, &cp->cp_copyout, ctd_stq, tmp)
cesa_append_tdesc(cr, ctd);
STAILQ_INIT(&cp->cp_copyout);
return (0);
}
static int
cesa_set_mkey(struct cesa_session *cs, int alg, const uint8_t *mkey, int mklen)
{
uint8_t ipad[CESA_MAX_HMAC_BLOCK_LEN];
uint8_t opad[CESA_MAX_HMAC_BLOCK_LEN];
SHA1_CTX sha1ctx;
SHA256_CTX sha256ctx;
MD5_CTX md5ctx;
uint32_t *hout;
uint32_t *hin;
int i;
memset(ipad, HMAC_IPAD_VAL, CESA_MAX_HMAC_BLOCK_LEN);
memset(opad, HMAC_OPAD_VAL, CESA_MAX_HMAC_BLOCK_LEN);
for (i = 0; i < mklen; i++) {
ipad[i] ^= mkey[i];
opad[i] ^= mkey[i];
}
hin = (uint32_t *)cs->cs_hiv_in;
hout = (uint32_t *)cs->cs_hiv_out;
switch (alg) {
case CRYPTO_MD5_HMAC:
MD5Init(&md5ctx);
MD5Update(&md5ctx, ipad, MD5_HMAC_BLOCK_LEN);
memcpy(hin, md5ctx.state, sizeof(md5ctx.state));
MD5Init(&md5ctx);
MD5Update(&md5ctx, opad, MD5_HMAC_BLOCK_LEN);
memcpy(hout, md5ctx.state, sizeof(md5ctx.state));
break;
case CRYPTO_SHA1_HMAC:
SHA1Init(&sha1ctx);
SHA1Update(&sha1ctx, ipad, SHA1_HMAC_BLOCK_LEN);
memcpy(hin, sha1ctx.h.b32, sizeof(sha1ctx.h.b32));
SHA1Init(&sha1ctx);
SHA1Update(&sha1ctx, opad, SHA1_HMAC_BLOCK_LEN);
memcpy(hout, sha1ctx.h.b32, sizeof(sha1ctx.h.b32));
break;
case CRYPTO_SHA2_256_HMAC:
SHA256_Init(&sha256ctx);
SHA256_Update(&sha256ctx, ipad, SHA2_256_HMAC_BLOCK_LEN);
memcpy(hin, sha256ctx.state, sizeof(sha256ctx.state));
SHA256_Init(&sha256ctx);
SHA256_Update(&sha256ctx, opad, SHA2_256_HMAC_BLOCK_LEN);
memcpy(hout, sha256ctx.state, sizeof(sha256ctx.state));
break;
default:
return (EINVAL);
}
for (i = 0; i < CESA_MAX_HASH_LEN / sizeof(uint32_t); i++) {
hin[i] = htobe32(hin[i]);
hout[i] = htobe32(hout[i]);
}
return (0);
}
static int
cesa_prep_aes_key(struct cesa_session *cs)
{
uint32_t ek[4 * (RIJNDAEL_MAXNR + 1)];
uint32_t *dkey;
int i;
rijndaelKeySetupEnc(ek, cs->cs_key, cs->cs_klen * 8);
cs->cs_config &= ~CESA_CSH_AES_KLEN_MASK;
dkey = (uint32_t *)cs->cs_aes_dkey;
switch (cs->cs_klen) {
case 16:
cs->cs_config |= CESA_CSH_AES_KLEN_128;
for (i = 0; i < 4; i++)
*dkey++ = htobe32(ek[4 * 10 + i]);
break;
case 24:
cs->cs_config |= CESA_CSH_AES_KLEN_192;
for (i = 0; i < 4; i++)
*dkey++ = htobe32(ek[4 * 12 + i]);
for (i = 0; i < 2; i++)
*dkey++ = htobe32(ek[4 * 11 + 2 + i]);
break;
case 32:
cs->cs_config |= CESA_CSH_AES_KLEN_256;
for (i = 0; i < 4; i++)
*dkey++ = htobe32(ek[4 * 14 + i]);
for (i = 0; i < 4; i++)
*dkey++ = htobe32(ek[4 * 13 + i]);
break;
default:
return (EINVAL);
}
return (0);
}
static int
cesa_is_hash(int alg)
{
switch (alg) {
case CRYPTO_MD5:
case CRYPTO_MD5_HMAC:
case CRYPTO_SHA1:
case CRYPTO_SHA1_HMAC:
case CRYPTO_SHA2_256_HMAC:
return (1);
default:
return (0);
}
}
static void
cesa_start_packet(struct cesa_packet *cp, unsigned int size)
{
cp->cp_size = size;
cp->cp_offset = 0;
STAILQ_INIT(&cp->cp_copyin);
STAILQ_INIT(&cp->cp_copyout);
}
static int
cesa_fill_packet(struct cesa_softc *sc, struct cesa_packet *cp,
bus_dma_segment_t *seg)
{
struct cesa_tdma_desc *ctd;
unsigned int bsize;
/* Calculate size of block copy */
bsize = MIN(seg->ds_len, cp->cp_size - cp->cp_offset);
if (bsize > 0) {
ctd = cesa_tdma_copy(sc, sc->sc_sram_base_pa +
CESA_DATA(cp->cp_offset), seg->ds_addr, bsize);
if (!ctd)
return (-ENOMEM);
STAILQ_INSERT_TAIL(&cp->cp_copyin, ctd, ctd_stq);
ctd = cesa_tdma_copy(sc, seg->ds_addr, sc->sc_sram_base_pa +
CESA_DATA(cp->cp_offset), bsize);
if (!ctd)
return (-ENOMEM);
STAILQ_INSERT_TAIL(&cp->cp_copyout, ctd, ctd_stq);
seg->ds_len -= bsize;
seg->ds_addr += bsize;
cp->cp_offset += bsize;
}
return (bsize);
}
static void
cesa_create_chain_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
unsigned int mpsize, fragmented;
unsigned int mlen, mskip, tmlen;
struct cesa_chain_info *cci;
unsigned int elen, eskip;
unsigned int skip, len;
struct cesa_sa_desc *csd;
struct cesa_request *cr;
struct cesa_softc *sc;
struct cesa_packet cp;
bus_dma_segment_t seg;
uint32_t config;
int size;
cci = arg;
sc = cci->cci_sc;
cr = cci->cci_cr;
if (error) {
cci->cci_error = error;
return;
}
elen = cci->cci_enc ? cci->cci_enc->crd_len : 0;
eskip = cci->cci_enc ? cci->cci_enc->crd_skip : 0;
mlen = cci->cci_mac ? cci->cci_mac->crd_len : 0;
mskip = cci->cci_mac ? cci->cci_mac->crd_skip : 0;
if (elen && mlen &&
((eskip > mskip && ((eskip - mskip) & (cr->cr_cs->cs_ivlen - 1))) ||
(mskip > eskip && ((mskip - eskip) & (cr->cr_cs->cs_mblen - 1))) ||
(eskip > (mskip + mlen)) || (mskip > (eskip + elen)))) {
/*
* Data alignment in the request does not meet CESA requiremnts
* for combined encryption/decryption and hashing. We have to
* split the request to separate operations and process them
* one by one.
*/
config = cci->cci_config;
if ((config & CESA_CSHD_OP_MASK) == CESA_CSHD_MAC_AND_ENC) {
config &= ~CESA_CSHD_OP_MASK;
cci->cci_config = config | CESA_CSHD_MAC;
cci->cci_enc = NULL;
cci->cci_mac = cr->cr_mac;
cesa_create_chain_cb(cci, segs, nseg, cci->cci_error);
cci->cci_config = config | CESA_CSHD_ENC;
cci->cci_enc = cr->cr_enc;
cci->cci_mac = NULL;
cesa_create_chain_cb(cci, segs, nseg, cci->cci_error);
} else {
config &= ~CESA_CSHD_OP_MASK;
cci->cci_config = config | CESA_CSHD_ENC;
cci->cci_enc = cr->cr_enc;
cci->cci_mac = NULL;
cesa_create_chain_cb(cci, segs, nseg, cci->cci_error);
cci->cci_config = config | CESA_CSHD_MAC;
cci->cci_enc = NULL;
cci->cci_mac = cr->cr_mac;
cesa_create_chain_cb(cci, segs, nseg, cci->cci_error);
}
return;
}
tmlen = mlen;
fragmented = 0;
mpsize = CESA_MAX_PACKET_SIZE;
mpsize &= ~((cr->cr_cs->cs_ivlen - 1) | (cr->cr_cs->cs_mblen - 1));
if (elen && mlen) {
skip = MIN(eskip, mskip);
len = MAX(elen + eskip, mlen + mskip) - skip;
} else if (elen) {
skip = eskip;
len = elen;
} else {
skip = mskip;
len = mlen;
}
/* Start first packet in chain */
cesa_start_packet(&cp, MIN(mpsize, len));
while (nseg-- && len > 0) {
seg = *(segs++);
/*
* Skip data in buffer on which neither ENC nor MAC operation
* is requested.
*/
if (skip > 0) {
size = MIN(skip, seg.ds_len);
skip -= size;
seg.ds_addr += size;
seg.ds_len -= size;
if (eskip > 0)
eskip -= size;
if (mskip > 0)
mskip -= size;
if (seg.ds_len == 0)
continue;
}
while (1) {
/*
* Fill in current packet with data. Break if there is
* no more data in current DMA segment or an error
* occurred.
*/
size = cesa_fill_packet(sc, &cp, &seg);
if (size <= 0) {
error = -size;
break;
}
len -= size;
/* If packet is full, append it to the chain */
if (cp.cp_size == cp.cp_offset) {
csd = cesa_alloc_sdesc(sc, cr);
if (!csd) {
error = ENOMEM;
break;
}
/* Create SA descriptor for this packet */
csd->csd_cshd->cshd_config = cci->cci_config;
csd->csd_cshd->cshd_mac_total_dlen = tmlen;
/*
* Enable fragmentation if request will not fit
* into one packet.
*/
if (len > 0) {
if (!fragmented) {
fragmented = 1;
csd->csd_cshd->cshd_config |=
CESA_CSHD_FRAG_FIRST;
} else
csd->csd_cshd->cshd_config |=
CESA_CSHD_FRAG_MIDDLE;
} else if (fragmented)
csd->csd_cshd->cshd_config |=
CESA_CSHD_FRAG_LAST;
if (eskip < cp.cp_size && elen > 0) {
csd->csd_cshd->cshd_enc_src =
CESA_DATA(eskip);
csd->csd_cshd->cshd_enc_dst =
CESA_DATA(eskip);
csd->csd_cshd->cshd_enc_dlen =
MIN(elen, cp.cp_size - eskip);
}
if (mskip < cp.cp_size && mlen > 0) {
csd->csd_cshd->cshd_mac_src =
CESA_DATA(mskip);
csd->csd_cshd->cshd_mac_dlen =
MIN(mlen, cp.cp_size - mskip);
}
elen -= csd->csd_cshd->cshd_enc_dlen;
eskip -= MIN(eskip, cp.cp_size);
mlen -= csd->csd_cshd->cshd_mac_dlen;
mskip -= MIN(mskip, cp.cp_size);
cesa_dump_cshd(sc, csd->csd_cshd);
/* Append packet to the request */
error = cesa_append_packet(sc, cr, &cp, csd);
if (error)
break;
/* Start a new packet, as current is full */
cesa_start_packet(&cp, MIN(mpsize, len));
}
}
if (error)
break;
}
if (error) {
/*
* Move all allocated resources to the request. They will be
* freed later.
*/
STAILQ_CONCAT(&cr->cr_tdesc, &cp.cp_copyin);
STAILQ_CONCAT(&cr->cr_tdesc, &cp.cp_copyout);
cci->cci_error = error;
}
}
static void
cesa_create_chain_cb2(void *arg, bus_dma_segment_t *segs, int nseg,
bus_size_t size, int error)
{
cesa_create_chain_cb(arg, segs, nseg, error);
}
static int
cesa_create_chain(struct cesa_softc *sc, struct cesa_request *cr)
{
struct cesa_chain_info cci;
struct cesa_tdma_desc *ctd;
uint32_t config;
int error;
error = 0;
CESA_LOCK_ASSERT(sc, sessions);
/* Create request metadata */
if (cr->cr_enc) {
if (cr->cr_enc->crd_alg == CRYPTO_AES_CBC &&
(cr->cr_enc->crd_flags & CRD_F_ENCRYPT) == 0)
memcpy(cr->cr_csd->csd_key, cr->cr_cs->cs_aes_dkey,
cr->cr_cs->cs_klen);
else
memcpy(cr->cr_csd->csd_key, cr->cr_cs->cs_key,
cr->cr_cs->cs_klen);
}
if (cr->cr_mac) {
memcpy(cr->cr_csd->csd_hiv_in, cr->cr_cs->cs_hiv_in,
CESA_MAX_HASH_LEN);
memcpy(cr->cr_csd->csd_hiv_out, cr->cr_cs->cs_hiv_out,
CESA_MAX_HASH_LEN);
}
ctd = cesa_tdma_copyin_sa_data(sc, cr);
if (!ctd)
return (ENOMEM);
cesa_append_tdesc(cr, ctd);
/* Prepare SA configuration */
config = cr->cr_cs->cs_config;
if (cr->cr_enc && (cr->cr_enc->crd_flags & CRD_F_ENCRYPT) == 0)
config |= CESA_CSHD_DECRYPT;
if (cr->cr_enc && !cr->cr_mac)
config |= CESA_CSHD_ENC;
if (!cr->cr_enc && cr->cr_mac)
config |= CESA_CSHD_MAC;
if (cr->cr_enc && cr->cr_mac)
config |= (config & CESA_CSHD_DECRYPT) ? CESA_CSHD_MAC_AND_ENC :
CESA_CSHD_ENC_AND_MAC;
/* Create data packets */
cci.cci_sc = sc;
cci.cci_cr = cr;
cci.cci_enc = cr->cr_enc;
cci.cci_mac = cr->cr_mac;
cci.cci_config = config;
cci.cci_error = 0;
if (cr->cr_crp->crp_flags & CRYPTO_F_IOV)
error = bus_dmamap_load_uio(sc->sc_data_dtag,
cr->cr_dmap, (struct uio *)cr->cr_crp->crp_buf,
cesa_create_chain_cb2, &cci, BUS_DMA_NOWAIT);
else if (cr->cr_crp->crp_flags & CRYPTO_F_IMBUF)
error = bus_dmamap_load_mbuf(sc->sc_data_dtag,
cr->cr_dmap, (struct mbuf *)cr->cr_crp->crp_buf,
cesa_create_chain_cb2, &cci, BUS_DMA_NOWAIT);
else
error = bus_dmamap_load(sc->sc_data_dtag,
cr->cr_dmap, cr->cr_crp->crp_buf,
cr->cr_crp->crp_ilen, cesa_create_chain_cb, &cci,
BUS_DMA_NOWAIT);
if (!error)
cr->cr_dmap_loaded = 1;
if (cci.cci_error)
error = cci.cci_error;
if (error)
return (error);
/* Read back request metadata */
ctd = cesa_tdma_copyout_sa_data(sc, cr);
if (!ctd)
return (ENOMEM);
cesa_append_tdesc(cr, ctd);
return (0);
}
static void
cesa_execute(struct cesa_softc *sc)
{
struct cesa_tdma_desc *prev_ctd, *ctd;
struct cesa_request *prev_cr, *cr;
CESA_LOCK(sc, requests);
/*
* If ready list is empty, there is nothing to execute. If queued list
* is not empty, the hardware is busy and we cannot start another
* execution.
*/
if (STAILQ_EMPTY(&sc->sc_ready_requests) ||
!STAILQ_EMPTY(&sc->sc_queued_requests)) {
CESA_UNLOCK(sc, requests);
return;
}
/* Move all ready requests to queued list */
STAILQ_CONCAT(&sc->sc_queued_requests, &sc->sc_ready_requests);
STAILQ_INIT(&sc->sc_ready_requests);
/* Create one execution chain from all requests on the list */
if (STAILQ_FIRST(&sc->sc_queued_requests) !=
STAILQ_LAST(&sc->sc_queued_requests, cesa_request, cr_stq)) {
prev_cr = NULL;
cesa_sync_dma_mem(&sc->sc_tdesc_cdm, BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
STAILQ_FOREACH(cr, &sc->sc_queued_requests, cr_stq) {
if (prev_cr) {
ctd = STAILQ_FIRST(&cr->cr_tdesc);
prev_ctd = STAILQ_LAST(&prev_cr->cr_tdesc,
cesa_tdma_desc, ctd_stq);
prev_ctd->ctd_cthd->cthd_next =
ctd->ctd_cthd_paddr;
}
prev_cr = cr;
}
cesa_sync_dma_mem(&sc->sc_tdesc_cdm, BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
}
/* Start chain execution in hardware */
cr = STAILQ_FIRST(&sc->sc_queued_requests);
ctd = STAILQ_FIRST(&cr->cr_tdesc);
CESA_TDMA_WRITE(sc, CESA_TDMA_ND, ctd->ctd_cthd_paddr);
if (sc->sc_soc_id == MV_DEV_88F6828 ||
sc->sc_soc_id == MV_DEV_88F6820 ||
sc->sc_soc_id == MV_DEV_88F6810)
CESA_REG_WRITE(sc, CESA_SA_CMD, CESA_SA_CMD_ACTVATE | CESA_SA_CMD_SHA2);
else
CESA_REG_WRITE(sc, CESA_SA_CMD, CESA_SA_CMD_ACTVATE);
CESA_UNLOCK(sc, requests);
}
static int
cesa_setup_sram(struct cesa_softc *sc)
{
phandle_t sram_node;
ihandle_t sram_ihandle;
pcell_t sram_handle, sram_reg[2];
void *sram_va;
int rv;
rv = OF_getencprop(ofw_bus_get_node(sc->sc_dev), "sram-handle",
(void *)&sram_handle, sizeof(sram_handle));
if (rv <= 0)
return (rv);
sram_ihandle = (ihandle_t)sram_handle;
sram_node = OF_instance_to_package(sram_ihandle);
rv = OF_getencprop(sram_node, "reg", (void *)sram_reg, sizeof(sram_reg));
if (rv <= 0)
return (rv);
sc->sc_sram_base_pa = sram_reg[0];
/* Store SRAM size to be able to unmap in detach() */
sc->sc_sram_size = sram_reg[1];
if (sc->sc_soc_id != MV_DEV_88F6828 &&
sc->sc_soc_id != MV_DEV_88F6820 &&
sc->sc_soc_id != MV_DEV_88F6810)
return (0);
/* SRAM memory was not mapped in platform_sram_devmap(), map it now */
sram_va = pmap_mapdev(sc->sc_sram_base_pa, sc->sc_sram_size);
if (sram_va == NULL)
return (ENOMEM);
sc->sc_sram_base_va = (vm_offset_t)sram_va;
return (0);
}
static int
cesa_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "mrvl,cesa"))
return (ENXIO);
device_set_desc(dev, "Marvell Cryptographic Engine and Security "
"Accelerator");
return (BUS_PROBE_DEFAULT);
}
static int
cesa_attach(device_t dev)
{
struct cesa_softc *sc;
uint32_t d, r, val;
int error;
int i;
sc = device_get_softc(dev);
sc->sc_blocked = 0;
sc->sc_error = 0;
sc->sc_dev = dev;
soc_id(&d, &r);
switch (d) {
case MV_DEV_88F6281:
case MV_DEV_88F6282:
/* Check if CESA peripheral device has power turned on */
if (soc_power_ctrl_get(CPU_PM_CTRL_CRYPTO) ==
CPU_PM_CTRL_CRYPTO) {
device_printf(dev, "not powered on\n");
return (ENXIO);
}
sc->sc_tperr = 0;
break;
case MV_DEV_88F6828:
case MV_DEV_88F6820:
case MV_DEV_88F6810:
sc->sc_tperr = 0;
break;
case MV_DEV_MV78100:
case MV_DEV_MV78100_Z0:
/* Check if CESA peripheral device has power turned on */
if (soc_power_ctrl_get(CPU_PM_CTRL_CRYPTO) !=
CPU_PM_CTRL_CRYPTO) {
device_printf(dev, "not powered on\n");
return (ENXIO);
}
sc->sc_tperr = CESA_ICR_TPERR;
break;
default:
return (ENXIO);
}
sc->sc_soc_id = d;
/* Initialize mutexes */
mtx_init(&sc->sc_sc_lock, device_get_nameunit(dev),
"CESA Shared Data", MTX_DEF);
mtx_init(&sc->sc_tdesc_lock, device_get_nameunit(dev),
"CESA TDMA Descriptors Pool", MTX_DEF);
mtx_init(&sc->sc_sdesc_lock, device_get_nameunit(dev),
"CESA SA Descriptors Pool", MTX_DEF);
mtx_init(&sc->sc_requests_lock, device_get_nameunit(dev),
"CESA Requests Pool", MTX_DEF);
mtx_init(&sc->sc_sessions_lock, device_get_nameunit(dev),
"CESA Sessions Pool", MTX_DEF);
/* Allocate I/O and IRQ resources */
error = bus_alloc_resources(dev, cesa_res_spec, sc->sc_res);
if (error) {
device_printf(dev, "could not allocate resources\n");
goto err0;
}
/* Acquire SRAM base address */
error = cesa_setup_sram(sc);
if (error) {
device_printf(dev, "could not setup SRAM\n");
goto err1;
}
/* Setup interrupt handler */
error = bus_setup_intr(dev, sc->sc_res[RES_CESA_IRQ], INTR_TYPE_NET |
INTR_MPSAFE, NULL, cesa_intr, sc, &(sc->sc_icookie));
if (error) {
device_printf(dev, "could not setup engine completion irq\n");
goto err2;
}
/* Create DMA tag for processed data */
error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
CESA_MAX_REQUEST_SIZE, /* maxsize */
CESA_MAX_FRAGMENTS, /* nsegments */
CESA_MAX_REQUEST_SIZE, 0, /* maxsegsz, flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sc->sc_data_dtag); /* dmat */
if (error)
goto err3;
/* Initialize data structures: TDMA Descriptors Pool */
error = cesa_alloc_dma_mem(sc, &sc->sc_tdesc_cdm,
CESA_TDMA_DESCRIPTORS * sizeof(struct cesa_tdma_hdesc));
if (error)
goto err4;
STAILQ_INIT(&sc->sc_free_tdesc);
for (i = 0; i < CESA_TDMA_DESCRIPTORS; i++) {
sc->sc_tdesc[i].ctd_cthd =
(struct cesa_tdma_hdesc *)(sc->sc_tdesc_cdm.cdm_vaddr) + i;
sc->sc_tdesc[i].ctd_cthd_paddr = sc->sc_tdesc_cdm.cdm_paddr +
(i * sizeof(struct cesa_tdma_hdesc));
STAILQ_INSERT_TAIL(&sc->sc_free_tdesc, &sc->sc_tdesc[i],
ctd_stq);
}
/* Initialize data structures: SA Descriptors Pool */
error = cesa_alloc_dma_mem(sc, &sc->sc_sdesc_cdm,
CESA_SA_DESCRIPTORS * sizeof(struct cesa_sa_hdesc));
if (error)
goto err5;
STAILQ_INIT(&sc->sc_free_sdesc);
for (i = 0; i < CESA_SA_DESCRIPTORS; i++) {
sc->sc_sdesc[i].csd_cshd =
(struct cesa_sa_hdesc *)(sc->sc_sdesc_cdm.cdm_vaddr) + i;
sc->sc_sdesc[i].csd_cshd_paddr = sc->sc_sdesc_cdm.cdm_paddr +
(i * sizeof(struct cesa_sa_hdesc));
STAILQ_INSERT_TAIL(&sc->sc_free_sdesc, &sc->sc_sdesc[i],
csd_stq);
}
/* Initialize data structures: Requests Pool */
error = cesa_alloc_dma_mem(sc, &sc->sc_requests_cdm,
CESA_REQUESTS * sizeof(struct cesa_sa_data));
if (error)
goto err6;
STAILQ_INIT(&sc->sc_free_requests);
STAILQ_INIT(&sc->sc_ready_requests);
STAILQ_INIT(&sc->sc_queued_requests);
for (i = 0; i < CESA_REQUESTS; i++) {
sc->sc_requests[i].cr_csd =
(struct cesa_sa_data *)(sc->sc_requests_cdm.cdm_vaddr) + i;
sc->sc_requests[i].cr_csd_paddr =
sc->sc_requests_cdm.cdm_paddr +
(i * sizeof(struct cesa_sa_data));
/* Preallocate DMA maps */
error = bus_dmamap_create(sc->sc_data_dtag, 0,
&sc->sc_requests[i].cr_dmap);
if (error && i > 0) {
i--;
do {
bus_dmamap_destroy(sc->sc_data_dtag,
sc->sc_requests[i].cr_dmap);
} while (i--);
goto err7;
}
STAILQ_INSERT_TAIL(&sc->sc_free_requests, &sc->sc_requests[i],
cr_stq);
}
/* Initialize data structures: Sessions Pool */
STAILQ_INIT(&sc->sc_free_sessions);
for (i = 0; i < CESA_SESSIONS; i++) {
sc->sc_sessions[i].cs_sid = i;
STAILQ_INSERT_TAIL(&sc->sc_free_sessions, &sc->sc_sessions[i],
cs_stq);
}
/*
* Initialize TDMA:
* - Burst limit: 128 bytes,
* - Outstanding reads enabled,
* - No byte-swap.
*/
val = CESA_TDMA_CR_DBL128 | CESA_TDMA_CR_SBL128 |
CESA_TDMA_CR_ORDEN | CESA_TDMA_CR_NBS | CESA_TDMA_CR_ENABLE;
if (sc->sc_soc_id == MV_DEV_88F6828 ||
sc->sc_soc_id == MV_DEV_88F6820 ||
sc->sc_soc_id == MV_DEV_88F6810)
val |= CESA_TDMA_NUM_OUTSTAND;
CESA_TDMA_WRITE(sc, CESA_TDMA_CR, val);
/*
* Initialize SA:
* - SA descriptor is present at beginning of CESA SRAM,
* - Multi-packet chain mode,
* - Cooperation with TDMA enabled.
*/
CESA_REG_WRITE(sc, CESA_SA_DPR, 0);
CESA_REG_WRITE(sc, CESA_SA_CR, CESA_SA_CR_ACTIVATE_TDMA |
CESA_SA_CR_WAIT_FOR_TDMA | CESA_SA_CR_MULTI_MODE);
/* Unmask interrupts */
CESA_REG_WRITE(sc, CESA_ICR, 0);
CESA_REG_WRITE(sc, CESA_ICM, CESA_ICM_ACCTDMA | sc->sc_tperr);
CESA_TDMA_WRITE(sc, CESA_TDMA_ECR, 0);
CESA_TDMA_WRITE(sc, CESA_TDMA_EMR, CESA_TDMA_EMR_MISS |
CESA_TDMA_EMR_DOUBLE_HIT | CESA_TDMA_EMR_BOTH_HIT |
CESA_TDMA_EMR_DATA_ERROR);
/* Register in OCF */
sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE);
if (sc->sc_cid < 0) {
device_printf(dev, "could not get crypto driver id\n");
goto err8;
}
crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
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_MD5, 0, 0);
crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0);
crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
if (sc->sc_soc_id == MV_DEV_88F6828 ||
sc->sc_soc_id == MV_DEV_88F6820 ||
sc->sc_soc_id == MV_DEV_88F6810)
crypto_register(sc->sc_cid, CRYPTO_SHA2_256_HMAC, 0, 0);
return (0);
err8:
for (i = 0; i < CESA_REQUESTS; i++)
bus_dmamap_destroy(sc->sc_data_dtag,
sc->sc_requests[i].cr_dmap);
err7:
cesa_free_dma_mem(&sc->sc_requests_cdm);
err6:
cesa_free_dma_mem(&sc->sc_sdesc_cdm);
err5:
cesa_free_dma_mem(&sc->sc_tdesc_cdm);
err4:
bus_dma_tag_destroy(sc->sc_data_dtag);
err3:
bus_teardown_intr(dev, sc->sc_res[RES_CESA_IRQ], sc->sc_icookie);
err2:
if (sc->sc_soc_id == MV_DEV_88F6828 ||
sc->sc_soc_id == MV_DEV_88F6820 ||
sc->sc_soc_id == MV_DEV_88F6810)
pmap_unmapdev(sc->sc_sram_base_va, sc->sc_sram_size);
err1:
bus_release_resources(dev, cesa_res_spec, sc->sc_res);
err0:
mtx_destroy(&sc->sc_sessions_lock);
mtx_destroy(&sc->sc_requests_lock);
mtx_destroy(&sc->sc_sdesc_lock);
mtx_destroy(&sc->sc_tdesc_lock);
mtx_destroy(&sc->sc_sc_lock);
return (ENXIO);
}
static int
cesa_detach(device_t dev)
{
struct cesa_softc *sc;
int i;
sc = device_get_softc(dev);
/* TODO: Wait for queued requests completion before shutdown. */
/* Mask interrupts */
CESA_REG_WRITE(sc, CESA_ICM, 0);
CESA_TDMA_WRITE(sc, CESA_TDMA_EMR, 0);
/* Unregister from OCF */
crypto_unregister_all(sc->sc_cid);
/* Free DMA Maps */
for (i = 0; i < CESA_REQUESTS; i++)
bus_dmamap_destroy(sc->sc_data_dtag,
sc->sc_requests[i].cr_dmap);
/* Free DMA Memory */
cesa_free_dma_mem(&sc->sc_requests_cdm);
cesa_free_dma_mem(&sc->sc_sdesc_cdm);
cesa_free_dma_mem(&sc->sc_tdesc_cdm);
/* Free DMA Tag */
bus_dma_tag_destroy(sc->sc_data_dtag);
/* Stop interrupt */
bus_teardown_intr(dev, sc->sc_res[RES_CESA_IRQ], sc->sc_icookie);
/* Relase I/O and IRQ resources */
bus_release_resources(dev, cesa_res_spec, sc->sc_res);
/* Unmap SRAM memory */
if (sc->sc_soc_id == MV_DEV_88F6828 ||
sc->sc_soc_id == MV_DEV_88F6820 ||
sc->sc_soc_id == MV_DEV_88F6810)
pmap_unmapdev(sc->sc_sram_base_va, sc->sc_sram_size);
/* Destroy mutexes */
mtx_destroy(&sc->sc_sessions_lock);
mtx_destroy(&sc->sc_requests_lock);
mtx_destroy(&sc->sc_sdesc_lock);
mtx_destroy(&sc->sc_tdesc_lock);
mtx_destroy(&sc->sc_sc_lock);
return (0);
}
static void
cesa_intr(void *arg)
{
STAILQ_HEAD(, cesa_request) requests;
struct cesa_request *cr, *tmp;
struct cesa_softc *sc;
uint32_t ecr, icr;
int blocked;
sc = arg;
/* Ack interrupt */
ecr = CESA_TDMA_READ(sc, CESA_TDMA_ECR);
CESA_TDMA_WRITE(sc, CESA_TDMA_ECR, 0);
icr = CESA_REG_READ(sc, CESA_ICR);
CESA_REG_WRITE(sc, CESA_ICR, 0);
/* Check for TDMA errors */
if (ecr & CESA_TDMA_ECR_MISS) {
device_printf(sc->sc_dev, "TDMA Miss error detected!\n");
sc->sc_error = EIO;
}
if (ecr & CESA_TDMA_ECR_DOUBLE_HIT) {
device_printf(sc->sc_dev, "TDMA Double Hit error detected!\n");
sc->sc_error = EIO;
}
if (ecr & CESA_TDMA_ECR_BOTH_HIT) {
device_printf(sc->sc_dev, "TDMA Both Hit error detected!\n");
sc->sc_error = EIO;
}
if (ecr & CESA_TDMA_ECR_DATA_ERROR) {
device_printf(sc->sc_dev, "TDMA Data error detected!\n");
sc->sc_error = EIO;
}
/* Check for CESA errors */
if (icr & sc->sc_tperr) {
device_printf(sc->sc_dev, "CESA SRAM Parity error detected!\n");
sc->sc_error = EIO;
}
/* If there is nothing more to do, return */
if ((icr & CESA_ICR_ACCTDMA) == 0)
return;
/* Get all finished requests */
CESA_LOCK(sc, requests);
STAILQ_INIT(&requests);
STAILQ_CONCAT(&requests, &sc->sc_queued_requests);
STAILQ_INIT(&sc->sc_queued_requests);
CESA_UNLOCK(sc, requests);
/* Execute all ready requests */
cesa_execute(sc);
/* Process completed requests */
cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
STAILQ_FOREACH_SAFE(cr, &requests, cr_stq, tmp) {
bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
cr->cr_crp->crp_etype = sc->sc_error;
if (cr->cr_mac)
crypto_copyback(cr->cr_crp->crp_flags,
cr->cr_crp->crp_buf, cr->cr_mac->crd_inject,
cr->cr_cs->cs_hlen, cr->cr_csd->csd_hash);
crypto_done(cr->cr_crp);
cesa_free_request(sc, cr);
}
cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
sc->sc_error = 0;
/* Unblock driver if it ran out of resources */
CESA_LOCK(sc, sc);
blocked = sc->sc_blocked;
sc->sc_blocked = 0;
CESA_UNLOCK(sc, sc);
if (blocked)
crypto_unblock(sc->sc_cid, blocked);
}
static int
cesa_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
{
struct cesa_session *cs;
struct cesa_softc *sc;
struct cryptoini *enc;
struct cryptoini *mac;
int error;
sc = device_get_softc(dev);
enc = NULL;
mac = NULL;
error = 0;
/* Check and parse input */
if (cesa_is_hash(cri->cri_alg))
mac = cri;
else
enc = cri;
cri = cri->cri_next;
if (cri) {
if (!enc && !cesa_is_hash(cri->cri_alg))
enc = cri;
if (!mac && cesa_is_hash(cri->cri_alg))
mac = cri;
if (cri->cri_next || !(enc && mac))
return (EINVAL);
}
if ((enc && (enc->cri_klen / 8) > CESA_MAX_KEY_LEN) ||
(mac && (mac->cri_klen / 8) > CESA_MAX_MKEY_LEN))
return (E2BIG);
/* Allocate session */
cs = cesa_alloc_session(sc);
if (!cs)
return (ENOMEM);
/* Prepare CESA configuration */
cs->cs_config = 0;
cs->cs_ivlen = 1;
cs->cs_mblen = 1;
if (enc) {
switch (enc->cri_alg) {
case CRYPTO_AES_CBC:
cs->cs_config |= CESA_CSHD_AES | CESA_CSHD_CBC;
cs->cs_ivlen = AES_BLOCK_LEN;
break;
case CRYPTO_DES_CBC:
cs->cs_config |= CESA_CSHD_DES | CESA_CSHD_CBC;
cs->cs_ivlen = DES_BLOCK_LEN;
break;
case CRYPTO_3DES_CBC:
cs->cs_config |= CESA_CSHD_3DES | CESA_CSHD_3DES_EDE |
CESA_CSHD_CBC;
cs->cs_ivlen = DES3_BLOCK_LEN;
break;
default:
error = EINVAL;
break;
}
}
if (!error && mac) {
switch (mac->cri_alg) {
case CRYPTO_MD5:
cs->cs_mblen = 1;
cs->cs_hlen = (mac->cri_mlen == 0) ? MD5_HASH_LEN :
mac->cri_mlen;
cs->cs_config |= CESA_CSHD_MD5;
break;
case CRYPTO_MD5_HMAC:
cs->cs_mblen = MD5_HMAC_BLOCK_LEN;
cs->cs_hlen = (mac->cri_mlen == 0) ? MD5_HASH_LEN :
mac->cri_mlen;
cs->cs_config |= CESA_CSHD_MD5_HMAC;
if (cs->cs_hlen == CESA_HMAC_TRUNC_LEN)
cs->cs_config |= CESA_CSHD_96_BIT_HMAC;
break;
case CRYPTO_SHA1:
cs->cs_mblen = 1;
cs->cs_hlen = (mac->cri_mlen == 0) ? SHA1_HASH_LEN :
mac->cri_mlen;
cs->cs_config |= CESA_CSHD_SHA1;
break;
case CRYPTO_SHA1_HMAC:
cs->cs_mblen = SHA1_HMAC_BLOCK_LEN;
cs->cs_hlen = (mac->cri_mlen == 0) ? SHA1_HASH_LEN :
mac->cri_mlen;
cs->cs_config |= CESA_CSHD_SHA1_HMAC;
if (cs->cs_hlen == CESA_HMAC_TRUNC_LEN)
cs->cs_config |= CESA_CSHD_96_BIT_HMAC;
break;
case CRYPTO_SHA2_256_HMAC:
cs->cs_mblen = SHA2_256_HMAC_BLOCK_LEN;
cs->cs_hlen = (mac->cri_mlen == 0) ? SHA2_256_HASH_LEN :
mac->cri_mlen;
cs->cs_config |= CESA_CSHD_SHA2_256_HMAC;
break;
default:
error = EINVAL;
break;
}
}
/* Save cipher key */
if (!error && enc && enc->cri_key) {
cs->cs_klen = enc->cri_klen / 8;
memcpy(cs->cs_key, enc->cri_key, cs->cs_klen);
if (enc->cri_alg == CRYPTO_AES_CBC)
error = cesa_prep_aes_key(cs);
}
/* Save digest key */
if (!error && mac && mac->cri_key)
error = cesa_set_mkey(cs, mac->cri_alg, mac->cri_key,
mac->cri_klen / 8);
if (error) {
cesa_free_session(sc, cs);
return (EINVAL);
}
*sidp = cs->cs_sid;
return (0);
}
static int
cesa_freesession(device_t dev, uint64_t tid)
{
struct cesa_session *cs;
struct cesa_softc *sc;
sc = device_get_softc(dev);
cs = cesa_get_session(sc, CRYPTO_SESID2LID(tid));
if (!cs)
return (EINVAL);
/* Free session */
cesa_free_session(sc, cs);
return (0);
}
static int
cesa_process(device_t dev, struct cryptop *crp, int hint)
{
struct cesa_request *cr;
struct cesa_session *cs;
struct cryptodesc *crd;
struct cryptodesc *enc;
struct cryptodesc *mac;
struct cesa_softc *sc;
int error;
sc = device_get_softc(dev);
crd = crp->crp_desc;
enc = NULL;
mac = NULL;
error = 0;
/* Check session ID */
cs = cesa_get_session(sc, CRYPTO_SESID2LID(crp->crp_sid));
if (!cs) {
crp->crp_etype = EINVAL;
crypto_done(crp);
return (0);
}
/* Check and parse input */
if (crp->crp_ilen > CESA_MAX_REQUEST_SIZE) {
crp->crp_etype = E2BIG;
crypto_done(crp);
return (0);
}
if (cesa_is_hash(crd->crd_alg))
mac = crd;
else
enc = crd;
crd = crd->crd_next;
if (crd) {
if (!enc && !cesa_is_hash(crd->crd_alg))
enc = crd;
if (!mac && cesa_is_hash(crd->crd_alg))
mac = crd;
if (crd->crd_next || !(enc && mac)) {
crp->crp_etype = EINVAL;
crypto_done(crp);
return (0);
}
}
/*
* Get request descriptor. Block driver if there is no free
* descriptors in pool.
*/
cr = cesa_alloc_request(sc);
if (!cr) {
CESA_LOCK(sc, sc);
sc->sc_blocked = CRYPTO_SYMQ;
CESA_UNLOCK(sc, sc);
return (ERESTART);
}
/* Prepare request */
cr->cr_crp = crp;
cr->cr_enc = enc;
cr->cr_mac = mac;
cr->cr_cs = cs;
CESA_LOCK(sc, sessions);
cesa_sync_desc(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
if (enc && enc->crd_flags & CRD_F_ENCRYPT) {
if (enc->crd_flags & CRD_F_IV_EXPLICIT)
memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen);
else
arc4rand(cr->cr_csd->csd_iv, cs->cs_ivlen, 0);
if ((enc->crd_flags & CRD_F_IV_PRESENT) == 0)
crypto_copyback(crp->crp_flags, crp->crp_buf,
enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv);
} else if (enc) {
if (enc->crd_flags & CRD_F_IV_EXPLICIT)
memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen);
else
crypto_copydata(crp->crp_flags, crp->crp_buf,
enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv);
}
if (enc && enc->crd_flags & CRD_F_KEY_EXPLICIT) {
if ((enc->crd_klen / 8) <= CESA_MAX_KEY_LEN) {
cs->cs_klen = enc->crd_klen / 8;
memcpy(cs->cs_key, enc->crd_key, cs->cs_klen);
if (enc->crd_alg == CRYPTO_AES_CBC)
error = cesa_prep_aes_key(cs);
} else
error = E2BIG;
}
if (!error && mac && mac->crd_flags & CRD_F_KEY_EXPLICIT) {
if ((mac->crd_klen / 8) <= CESA_MAX_MKEY_LEN)
error = cesa_set_mkey(cs, mac->crd_alg, mac->crd_key,
mac->crd_klen / 8);
else
error = E2BIG;
}
/* Convert request to chain of TDMA and SA descriptors */
if (!error)
error = cesa_create_chain(sc, cr);
cesa_sync_desc(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CESA_UNLOCK(sc, sessions);
if (error) {
cesa_free_request(sc, cr);
crp->crp_etype = error;
crypto_done(crp);
return (0);
}
bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap, BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
/* Enqueue request to execution */
cesa_enqueue_request(sc, cr);
/* Start execution, if we have no more requests in queue */
if ((hint & CRYPTO_HINT_MORE) == 0)
cesa_execute(sc);
return (0);
}
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