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linux-next/drivers/crypto/bcm/cipher.c
Ard Biesheuvel a9c01cd608 crypto: bcm-spu - switch to skcipher API 
Commit 7a7ffe65c8 ("crypto: skcipher - Add top-level skcipher interface")
dated 20 august 2015 introduced the new skcipher API which is supposed to
replace both blkcipher and ablkcipher. While all consumers of the API have
been converted long ago, some producers of the ablkcipher remain, forcing
us to keep the ablkcipher support routines alive, along with the matching
code to expose [a]blkciphers via the skcipher API.

So switch this driver to the skcipher API, allowing us to finally drop the
ablkcipher code in the near future.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-11-17 09:02:46 +08:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2016 Broadcom
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/crypto.h>
#include <linux/kthread.h>
#include <linux/rtnetlink.h>
#include <linux/sched.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <crypto/algapi.h>
#include <crypto/aead.h>
#include <crypto/internal/aead.h>
#include <crypto/aes.h>
#include <crypto/internal/des.h>
#include <crypto/hmac.h>
#include <crypto/sha.h>
#include <crypto/md5.h>
#include <crypto/authenc.h>
#include <crypto/skcipher.h>
#include <crypto/hash.h>
#include <crypto/sha3.h>
#include "util.h"
#include "cipher.h"
#include "spu.h"
#include "spum.h"
#include "spu2.h"
/* ================= Device Structure ================== */
struct device_private iproc_priv;
/* ==================== Parameters ===================== */
int flow_debug_logging;
module_param(flow_debug_logging, int, 0644);
MODULE_PARM_DESC(flow_debug_logging, "Enable Flow Debug Logging");
int packet_debug_logging;
module_param(packet_debug_logging, int, 0644);
MODULE_PARM_DESC(packet_debug_logging, "Enable Packet Debug Logging");
int debug_logging_sleep;
module_param(debug_logging_sleep, int, 0644);
MODULE_PARM_DESC(debug_logging_sleep, "Packet Debug Logging Sleep");
/*
* The value of these module parameters is used to set the priority for each
* algo type when this driver registers algos with the kernel crypto API.
* To use a priority other than the default, set the priority in the insmod or
* modprobe. Changing the module priority after init time has no effect.
*
* The default priorities are chosen to be lower (less preferred) than ARMv8 CE
* algos, but more preferred than generic software algos.
*/
static int cipher_pri = 150;
module_param(cipher_pri, int, 0644);
MODULE_PARM_DESC(cipher_pri, "Priority for cipher algos");
static int hash_pri = 100;
module_param(hash_pri, int, 0644);
MODULE_PARM_DESC(hash_pri, "Priority for hash algos");
static int aead_pri = 150;
module_param(aead_pri, int, 0644);
MODULE_PARM_DESC(aead_pri, "Priority for AEAD algos");
/* A type 3 BCM header, expected to precede the SPU header for SPU-M.
* Bits 3 and 4 in the first byte encode the channel number (the dma ringset).
* 0x60 - ring 0
* 0x68 - ring 1
* 0x70 - ring 2
* 0x78 - ring 3
*/
static char BCMHEADER[] = { 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28 };
/*
* Some SPU hw does not use BCM header on SPU messages. So BCM_HDR_LEN
* is set dynamically after reading SPU type from device tree.
*/
#define BCM_HDR_LEN iproc_priv.bcm_hdr_len
/* min and max time to sleep before retrying when mbox queue is full. usec */
#define MBOX_SLEEP_MIN 800
#define MBOX_SLEEP_MAX 1000
/**
* select_channel() - Select a SPU channel to handle a crypto request. Selects
* channel in round robin order.
*
* Return: channel index
*/
static u8 select_channel(void)
{
u8 chan_idx = atomic_inc_return(&iproc_priv.next_chan);
return chan_idx % iproc_priv.spu.num_chan;
}
/**
* spu_skcipher_rx_sg_create() - Build up the scatterlist of buffers used to
* receive a SPU response message for an skcipher request. Includes buffers to
* catch SPU message headers and the response data.
* @mssg: mailbox message containing the receive sg
* @rctx: crypto request context
* @rx_frag_num: number of scatterlist elements required to hold the
* SPU response message
* @chunksize: Number of bytes of response data expected
* @stat_pad_len: Number of bytes required to pad the STAT field to
* a 4-byte boundary
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Returns:
* 0 if successful
* < 0 if an error
*/
static int
spu_skcipher_rx_sg_create(struct brcm_message *mssg,
struct iproc_reqctx_s *rctx,
u8 rx_frag_num,
unsigned int chunksize, u32 stat_pad_len)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
struct iproc_ctx_s *ctx = rctx->ctx;
u32 datalen; /* Number of bytes of response data expected */
mssg->spu.dst = kcalloc(rx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (!mssg->spu.dst)
return -ENOMEM;
sg = mssg->spu.dst;
sg_init_table(sg, rx_frag_num);
/* Space for SPU message header */
sg_set_buf(sg++, rctx->msg_buf.spu_resp_hdr, ctx->spu_resp_hdr_len);
/* If XTS tweak in payload, add buffer to receive encrypted tweak */
if ((ctx->cipher.mode == CIPHER_MODE_XTS) &&
spu->spu_xts_tweak_in_payload())
sg_set_buf(sg++, rctx->msg_buf.c.supdt_tweak,
SPU_XTS_TWEAK_SIZE);
/* Copy in each dst sg entry from request, up to chunksize */
datalen = spu_msg_sg_add(&sg, &rctx->dst_sg, &rctx->dst_skip,
rctx->dst_nents, chunksize);
if (datalen < chunksize) {
pr_err("%s(): failed to copy dst sg to mbox msg. chunksize %u, datalen %u",
__func__, chunksize, datalen);
return -EFAULT;
}
if (ctx->cipher.alg == CIPHER_ALG_RC4)
/* Add buffer to catch 260-byte SUPDT field for RC4 */
sg_set_buf(sg++, rctx->msg_buf.c.supdt_tweak, SPU_SUPDT_LEN);
if (stat_pad_len)
sg_set_buf(sg++, rctx->msg_buf.rx_stat_pad, stat_pad_len);
memset(rctx->msg_buf.rx_stat, 0, SPU_RX_STATUS_LEN);
sg_set_buf(sg, rctx->msg_buf.rx_stat, spu->spu_rx_status_len());
return 0;
}
/**
* spu_skcipher_tx_sg_create() - Build up the scatterlist of buffers used to
* send a SPU request message for an skcipher request. Includes SPU message
* headers and the request data.
* @mssg: mailbox message containing the transmit sg
* @rctx: crypto request context
* @tx_frag_num: number of scatterlist elements required to construct the
* SPU request message
* @chunksize: Number of bytes of request data
* @pad_len: Number of pad bytes
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Returns:
* 0 if successful
* < 0 if an error
*/
static int
spu_skcipher_tx_sg_create(struct brcm_message *mssg,
struct iproc_reqctx_s *rctx,
u8 tx_frag_num, unsigned int chunksize, u32 pad_len)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
struct iproc_ctx_s *ctx = rctx->ctx;
u32 datalen; /* Number of bytes of response data expected */
u32 stat_len;
mssg->spu.src = kcalloc(tx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (unlikely(!mssg->spu.src))
return -ENOMEM;
sg = mssg->spu.src;
sg_init_table(sg, tx_frag_num);
sg_set_buf(sg++, rctx->msg_buf.bcm_spu_req_hdr,
BCM_HDR_LEN + ctx->spu_req_hdr_len);
/* if XTS tweak in payload, copy from IV (where crypto API puts it) */
if ((ctx->cipher.mode == CIPHER_MODE_XTS) &&
spu->spu_xts_tweak_in_payload())
sg_set_buf(sg++, rctx->msg_buf.iv_ctr, SPU_XTS_TWEAK_SIZE);
/* Copy in each src sg entry from request, up to chunksize */
datalen = spu_msg_sg_add(&sg, &rctx->src_sg, &rctx->src_skip,
rctx->src_nents, chunksize);
if (unlikely(datalen < chunksize)) {
pr_err("%s(): failed to copy src sg to mbox msg",
__func__);
return -EFAULT;
}
if (pad_len)
sg_set_buf(sg++, rctx->msg_buf.spu_req_pad, pad_len);
stat_len = spu->spu_tx_status_len();
if (stat_len) {
memset(rctx->msg_buf.tx_stat, 0, stat_len);
sg_set_buf(sg, rctx->msg_buf.tx_stat, stat_len);
}
return 0;
}
static int mailbox_send_message(struct brcm_message *mssg, u32 flags,
u8 chan_idx)
{
int err;
int retry_cnt = 0;
struct device *dev = &(iproc_priv.pdev->dev);
err = mbox_send_message(iproc_priv.mbox[chan_idx], mssg);
if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) {
while ((err == -ENOBUFS) && (retry_cnt < SPU_MB_RETRY_MAX)) {
/*
* Mailbox queue is full. Since MAY_SLEEP is set, assume
* not in atomic context and we can wait and try again.
*/
retry_cnt++;
usleep_range(MBOX_SLEEP_MIN, MBOX_SLEEP_MAX);
err = mbox_send_message(iproc_priv.mbox[chan_idx],
mssg);
atomic_inc(&iproc_priv.mb_no_spc);
}
}
if (err < 0) {
atomic_inc(&iproc_priv.mb_send_fail);
return err;
}
/* Check error returned by mailbox controller */
err = mssg->error;
if (unlikely(err < 0)) {
dev_err(dev, "message error %d", err);
/* Signal txdone for mailbox channel */
}
/* Signal txdone for mailbox channel */
mbox_client_txdone(iproc_priv.mbox[chan_idx], err);
return err;
}
/**
* handle_skcipher_req() - Submit as much of a block cipher request as fits in
* a single SPU request message, starting at the current position in the request
* data.
* @rctx: Crypto request context
*
* This may be called on the crypto API thread, or, when a request is so large
* it must be broken into multiple SPU messages, on the thread used to invoke
* the response callback. When requests are broken into multiple SPU
* messages, we assume subsequent messages depend on previous results, and
* thus always wait for previous results before submitting the next message.
* Because requests are submitted in lock step like this, there is no need
* to synchronize access to request data structures.
*
* Return: -EINPROGRESS: request has been accepted and result will be returned
* asynchronously
* Any other value indicates an error
*/
static int handle_skcipher_req(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_async_request *areq = rctx->parent;
struct skcipher_request *req =
container_of(areq, struct skcipher_request, base);
struct iproc_ctx_s *ctx = rctx->ctx;
struct spu_cipher_parms cipher_parms;
int err = 0;
unsigned int chunksize = 0; /* Num bytes of request to submit */
int remaining = 0; /* Bytes of request still to process */
int chunk_start; /* Beginning of data for current SPU msg */
/* IV or ctr value to use in this SPU msg */
u8 local_iv_ctr[MAX_IV_SIZE];
u32 stat_pad_len; /* num bytes to align status field */
u32 pad_len; /* total length of all padding */
bool update_key = false;
struct brcm_message *mssg; /* mailbox message */
/* number of entries in src and dst sg in mailbox message. */
u8 rx_frag_num = 2; /* response header and STATUS */
u8 tx_frag_num = 1; /* request header */
flow_log("%s\n", __func__);
cipher_parms.alg = ctx->cipher.alg;
cipher_parms.mode = ctx->cipher.mode;
cipher_parms.type = ctx->cipher_type;
cipher_parms.key_len = ctx->enckeylen;
cipher_parms.key_buf = ctx->enckey;
cipher_parms.iv_buf = local_iv_ctr;
cipher_parms.iv_len = rctx->iv_ctr_len;
mssg = &rctx->mb_mssg;
chunk_start = rctx->src_sent;
remaining = rctx->total_todo - chunk_start;
/* determine the chunk we are breaking off and update the indexes */
if ((ctx->max_payload != SPU_MAX_PAYLOAD_INF) &&
(remaining > ctx->max_payload))
chunksize = ctx->max_payload;
else
chunksize = remaining;
rctx->src_sent += chunksize;
rctx->total_sent = rctx->src_sent;
/* Count number of sg entries to be included in this request */
rctx->src_nents = spu_sg_count(rctx->src_sg, rctx->src_skip, chunksize);
rctx->dst_nents = spu_sg_count(rctx->dst_sg, rctx->dst_skip, chunksize);
if ((ctx->cipher.mode == CIPHER_MODE_CBC) &&
rctx->is_encrypt && chunk_start)
/*
* Encrypting non-first first chunk. Copy last block of
* previous result to IV for this chunk.
*/
sg_copy_part_to_buf(req->dst, rctx->msg_buf.iv_ctr,
rctx->iv_ctr_len,
chunk_start - rctx->iv_ctr_len);
if (rctx->iv_ctr_len) {
/* get our local copy of the iv */
__builtin_memcpy(local_iv_ctr, rctx->msg_buf.iv_ctr,
rctx->iv_ctr_len);
/* generate the next IV if possible */
if ((ctx->cipher.mode == CIPHER_MODE_CBC) &&
!rctx->is_encrypt) {
/*
* CBC Decrypt: next IV is the last ciphertext block in
* this chunk
*/
sg_copy_part_to_buf(req->src, rctx->msg_buf.iv_ctr,
rctx->iv_ctr_len,
rctx->src_sent - rctx->iv_ctr_len);
} else if (ctx->cipher.mode == CIPHER_MODE_CTR) {
/*
* The SPU hardware increments the counter once for
* each AES block of 16 bytes. So update the counter
* for the next chunk, if there is one. Note that for
* this chunk, the counter has already been copied to
* local_iv_ctr. We can assume a block size of 16,
* because we only support CTR mode for AES, not for
* any other cipher alg.
*/
add_to_ctr(rctx->msg_buf.iv_ctr, chunksize >> 4);
}
}
if (ctx->cipher.alg == CIPHER_ALG_RC4) {
rx_frag_num++;
if (chunk_start) {
/*
* for non-first RC4 chunks, use SUPDT from previous
* response as key for this chunk.
*/
cipher_parms.key_buf = rctx->msg_buf.c.supdt_tweak;
update_key = true;
cipher_parms.type = CIPHER_TYPE_UPDT;
} else if (!rctx->is_encrypt) {
/*
* First RC4 chunk. For decrypt, key in pre-built msg
* header may have been changed if encrypt required
* multiple chunks. So revert the key to the
* ctx->enckey value.
*/
update_key = true;
cipher_parms.type = CIPHER_TYPE_INIT;
}
}
if (ctx->max_payload == SPU_MAX_PAYLOAD_INF)
flow_log("max_payload infinite\n");
else
flow_log("max_payload %u\n", ctx->max_payload);
flow_log("sent:%u start:%u remains:%u size:%u\n",
rctx->src_sent, chunk_start, remaining, chunksize);
/* Copy SPU header template created at setkey time */
memcpy(rctx->msg_buf.bcm_spu_req_hdr, ctx->bcm_spu_req_hdr,
sizeof(rctx->msg_buf.bcm_spu_req_hdr));
/*
* Pass SUPDT field as key. Key field in finish() call is only used
* when update_key has been set above for RC4. Will be ignored in
* all other cases.
*/
spu->spu_cipher_req_finish(rctx->msg_buf.bcm_spu_req_hdr + BCM_HDR_LEN,
ctx->spu_req_hdr_len, !(rctx->is_encrypt),
&cipher_parms, update_key, chunksize);
atomic64_add(chunksize, &iproc_priv.bytes_out);
stat_pad_len = spu->spu_wordalign_padlen(chunksize);
if (stat_pad_len)
rx_frag_num++;
pad_len = stat_pad_len;
if (pad_len) {
tx_frag_num++;
spu->spu_request_pad(rctx->msg_buf.spu_req_pad, 0,
0, ctx->auth.alg, ctx->auth.mode,
rctx->total_sent, stat_pad_len);
}
spu->spu_dump_msg_hdr(rctx->msg_buf.bcm_spu_req_hdr + BCM_HDR_LEN,
ctx->spu_req_hdr_len);
packet_log("payload:\n");
dump_sg(rctx->src_sg, rctx->src_skip, chunksize);
packet_dump(" pad: ", rctx->msg_buf.spu_req_pad, pad_len);
/*
* Build mailbox message containing SPU request msg and rx buffers
* to catch response message
*/
memset(mssg, 0, sizeof(*mssg));
mssg->type = BRCM_MESSAGE_SPU;
mssg->ctx = rctx; /* Will be returned in response */
/* Create rx scatterlist to catch result */
rx_frag_num += rctx->dst_nents;
if ((ctx->cipher.mode == CIPHER_MODE_XTS) &&
spu->spu_xts_tweak_in_payload())
rx_frag_num++; /* extra sg to insert tweak */
err = spu_skcipher_rx_sg_create(mssg, rctx, rx_frag_num, chunksize,
stat_pad_len);
if (err)
return err;
/* Create tx scatterlist containing SPU request message */
tx_frag_num += rctx->src_nents;
if (spu->spu_tx_status_len())
tx_frag_num++;
if ((ctx->cipher.mode == CIPHER_MODE_XTS) &&
spu->spu_xts_tweak_in_payload())
tx_frag_num++; /* extra sg to insert tweak */
err = spu_skcipher_tx_sg_create(mssg, rctx, tx_frag_num, chunksize,
pad_len);
if (err)
return err;
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
return -EINPROGRESS;
}
/**
* handle_skcipher_resp() - Process a block cipher SPU response. Updates the
* total received count for the request and updates global stats.
* @rctx: Crypto request context
*/
static void handle_skcipher_resp(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
#ifdef DEBUG
struct crypto_async_request *areq = rctx->parent;
struct skcipher_request *req = skcipher_request_cast(areq);
#endif
struct iproc_ctx_s *ctx = rctx->ctx;
u32 payload_len;
/* See how much data was returned */
payload_len = spu->spu_payload_length(rctx->msg_buf.spu_resp_hdr);
/*
* In XTS mode, the first SPU_XTS_TWEAK_SIZE bytes may be the
* encrypted tweak ("i") value; we don't count those.
*/
if ((ctx->cipher.mode == CIPHER_MODE_XTS) &&
spu->spu_xts_tweak_in_payload() &&
(payload_len >= SPU_XTS_TWEAK_SIZE))
payload_len -= SPU_XTS_TWEAK_SIZE;
atomic64_add(payload_len, &iproc_priv.bytes_in);
flow_log("%s() offset: %u, bd_len: %u BD:\n",
__func__, rctx->total_received, payload_len);
dump_sg(req->dst, rctx->total_received, payload_len);
if (ctx->cipher.alg == CIPHER_ALG_RC4)
packet_dump(" supdt ", rctx->msg_buf.c.supdt_tweak,
SPU_SUPDT_LEN);
rctx->total_received += payload_len;
if (rctx->total_received == rctx->total_todo) {
atomic_inc(&iproc_priv.op_counts[SPU_OP_CIPHER]);
atomic_inc(
&iproc_priv.cipher_cnt[ctx->cipher.alg][ctx->cipher.mode]);
}
}
/**
* spu_ahash_rx_sg_create() - Build up the scatterlist of buffers used to
* receive a SPU response message for an ahash request.
* @mssg: mailbox message containing the receive sg
* @rctx: crypto request context
* @rx_frag_num: number of scatterlist elements required to hold the
* SPU response message
* @digestsize: length of hash digest, in bytes
* @stat_pad_len: Number of bytes required to pad the STAT field to
* a 4-byte boundary
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Return:
* 0 if successful
* < 0 if an error
*/
static int
spu_ahash_rx_sg_create(struct brcm_message *mssg,
struct iproc_reqctx_s *rctx,
u8 rx_frag_num, unsigned int digestsize,
u32 stat_pad_len)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
struct iproc_ctx_s *ctx = rctx->ctx;
mssg->spu.dst = kcalloc(rx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (!mssg->spu.dst)
return -ENOMEM;
sg = mssg->spu.dst;
sg_init_table(sg, rx_frag_num);
/* Space for SPU message header */
sg_set_buf(sg++, rctx->msg_buf.spu_resp_hdr, ctx->spu_resp_hdr_len);
/* Space for digest */
sg_set_buf(sg++, rctx->msg_buf.digest, digestsize);
if (stat_pad_len)
sg_set_buf(sg++, rctx->msg_buf.rx_stat_pad, stat_pad_len);
memset(rctx->msg_buf.rx_stat, 0, SPU_RX_STATUS_LEN);
sg_set_buf(sg, rctx->msg_buf.rx_stat, spu->spu_rx_status_len());
return 0;
}
/**
* spu_ahash_tx_sg_create() - Build up the scatterlist of buffers used to send
* a SPU request message for an ahash request. Includes SPU message headers and
* the request data.
* @mssg: mailbox message containing the transmit sg
* @rctx: crypto request context
* @tx_frag_num: number of scatterlist elements required to construct the
* SPU request message
* @spu_hdr_len: length in bytes of SPU message header
* @hash_carry_len: Number of bytes of data carried over from previous req
* @new_data_len: Number of bytes of new request data
* @pad_len: Number of pad bytes
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Return:
* 0 if successful
* < 0 if an error
*/
static int
spu_ahash_tx_sg_create(struct brcm_message *mssg,
struct iproc_reqctx_s *rctx,
u8 tx_frag_num,
u32 spu_hdr_len,
unsigned int hash_carry_len,
unsigned int new_data_len, u32 pad_len)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
u32 datalen; /* Number of bytes of response data expected */
u32 stat_len;
mssg->spu.src = kcalloc(tx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (!mssg->spu.src)
return -ENOMEM;
sg = mssg->spu.src;
sg_init_table(sg, tx_frag_num);
sg_set_buf(sg++, rctx->msg_buf.bcm_spu_req_hdr,
BCM_HDR_LEN + spu_hdr_len);
if (hash_carry_len)
sg_set_buf(sg++, rctx->hash_carry, hash_carry_len);
if (new_data_len) {
/* Copy in each src sg entry from request, up to chunksize */
datalen = spu_msg_sg_add(&sg, &rctx->src_sg, &rctx->src_skip,
rctx->src_nents, new_data_len);
if (datalen < new_data_len) {
pr_err("%s(): failed to copy src sg to mbox msg",
__func__);
return -EFAULT;
}
}
if (pad_len)
sg_set_buf(sg++, rctx->msg_buf.spu_req_pad, pad_len);
stat_len = spu->spu_tx_status_len();
if (stat_len) {
memset(rctx->msg_buf.tx_stat, 0, stat_len);
sg_set_buf(sg, rctx->msg_buf.tx_stat, stat_len);
}
return 0;
}
/**
* handle_ahash_req() - Process an asynchronous hash request from the crypto
* API.
* @rctx: Crypto request context
*
* Builds a SPU request message embedded in a mailbox message and submits the
* mailbox message on a selected mailbox channel. The SPU request message is
* constructed as a scatterlist, including entries from the crypto API's
* src scatterlist to avoid copying the data to be hashed. This function is
* called either on the thread from the crypto API, or, in the case that the
* crypto API request is too large to fit in a single SPU request message,
* on the thread that invokes the receive callback with a response message.
* Because some operations require the response from one chunk before the next
* chunk can be submitted, we always wait for the response for the previous
* chunk before submitting the next chunk. Because requests are submitted in
* lock step like this, there is no need to synchronize access to request data
* structures.
*
* Return:
* -EINPROGRESS: request has been submitted to SPU and response will be
* returned asynchronously
* -EAGAIN: non-final request included a small amount of data, which for
* efficiency we did not submit to the SPU, but instead stored
* to be submitted to the SPU with the next part of the request
* other: an error code
*/
static int handle_ahash_req(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_async_request *areq = rctx->parent;
struct ahash_request *req = ahash_request_cast(areq);
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct crypto_tfm *tfm = crypto_ahash_tfm(ahash);
unsigned int blocksize = crypto_tfm_alg_blocksize(tfm);
struct iproc_ctx_s *ctx = rctx->ctx;
/* number of bytes still to be hashed in this req */
unsigned int nbytes_to_hash = 0;
int err = 0;
unsigned int chunksize = 0; /* length of hash carry + new data */
/*
* length of new data, not from hash carry, to be submitted in
* this hw request
*/
unsigned int new_data_len;
unsigned int __maybe_unused chunk_start = 0;
u32 db_size; /* Length of data field, incl gcm and hash padding */
int pad_len = 0; /* total pad len, including gcm, hash, stat padding */
u32 data_pad_len = 0; /* length of GCM/CCM padding */
u32 stat_pad_len = 0; /* length of padding to align STATUS word */
struct brcm_message *mssg; /* mailbox message */
struct spu_request_opts req_opts;
struct spu_cipher_parms cipher_parms;
struct spu_hash_parms hash_parms;
struct spu_aead_parms aead_parms;
unsigned int local_nbuf;
u32 spu_hdr_len;
unsigned int digestsize;
u16 rem = 0;
/*
* number of entries in src and dst sg. Always includes SPU msg header.
* rx always includes a buffer to catch digest and STATUS.
*/
u8 rx_frag_num = 3;
u8 tx_frag_num = 1;
flow_log("total_todo %u, total_sent %u\n",
rctx->total_todo, rctx->total_sent);
memset(&req_opts, 0, sizeof(req_opts));
memset(&cipher_parms, 0, sizeof(cipher_parms));
memset(&hash_parms, 0, sizeof(hash_parms));
memset(&aead_parms, 0, sizeof(aead_parms));
req_opts.bd_suppress = true;
hash_parms.alg = ctx->auth.alg;
hash_parms.mode = ctx->auth.mode;
hash_parms.type = HASH_TYPE_NONE;
hash_parms.key_buf = (u8 *)ctx->authkey;
hash_parms.key_len = ctx->authkeylen;
/*
* For hash algorithms below assignment looks bit odd but
* it's needed for AES-XCBC and AES-CMAC hash algorithms
* to differentiate between 128, 192, 256 bit key values.
* Based on the key values, hash algorithm is selected.
* For example for 128 bit key, hash algorithm is AES-128.
*/
cipher_parms.type = ctx->cipher_type;
mssg = &rctx->mb_mssg;
chunk_start = rctx->src_sent;
/*
* Compute the amount remaining to hash. This may include data
* carried over from previous requests.
*/
nbytes_to_hash = rctx->total_todo - rctx->total_sent;
chunksize = nbytes_to_hash;
if ((ctx->max_payload != SPU_MAX_PAYLOAD_INF) &&
(chunksize > ctx->max_payload))
chunksize = ctx->max_payload;
/*
* If this is not a final request and the request data is not a multiple
* of a full block, then simply park the extra data and prefix it to the
* data for the next request.
*/
if (!rctx->is_final) {
u8 *dest = rctx->hash_carry + rctx->hash_carry_len;
u16 new_len; /* len of data to add to hash carry */
rem = chunksize % blocksize; /* remainder */
if (rem) {
/* chunksize not a multiple of blocksize */
chunksize -= rem;
if (chunksize == 0) {
/* Don't have a full block to submit to hw */
new_len = rem - rctx->hash_carry_len;
sg_copy_part_to_buf(req->src, dest, new_len,
rctx->src_sent);
rctx->hash_carry_len = rem;
flow_log("Exiting with hash carry len: %u\n",
rctx->hash_carry_len);
packet_dump(" buf: ",
rctx->hash_carry,
rctx->hash_carry_len);
return -EAGAIN;
}
}
}
/* if we have hash carry, then prefix it to the data in this request */
local_nbuf = rctx->hash_carry_len;
rctx->hash_carry_len = 0;
if (local_nbuf)
tx_frag_num++;
new_data_len = chunksize - local_nbuf;
/* Count number of sg entries to be used in this request */
rctx->src_nents = spu_sg_count(rctx->src_sg, rctx->src_skip,
new_data_len);
/* AES hashing keeps key size in type field, so need to copy it here */
if (hash_parms.alg == HASH_ALG_AES)
hash_parms.type = (enum hash_type)cipher_parms.type;
else
hash_parms.type = spu->spu_hash_type(rctx->total_sent);
digestsize = spu->spu_digest_size(ctx->digestsize, ctx->auth.alg,
hash_parms.type);
hash_parms.digestsize = digestsize;
/* update the indexes */
rctx->total_sent += chunksize;
/* if you sent a prebuf then that wasn't from this req->src */
rctx->src_sent += new_data_len;
if ((rctx->total_sent == rctx->total_todo) && rctx->is_final)
hash_parms.pad_len = spu->spu_hash_pad_len(hash_parms.alg,
hash_parms.mode,
chunksize,
blocksize);
/*
* If a non-first chunk, then include the digest returned from the
* previous chunk so that hw can add to it (except for AES types).
*/
if ((hash_parms.type == HASH_TYPE_UPDT) &&
(hash_parms.alg != HASH_ALG_AES)) {
hash_parms.key_buf = rctx->incr_hash;
hash_parms.key_len = digestsize;
}
atomic64_add(chunksize, &iproc_priv.bytes_out);
flow_log("%s() final: %u nbuf: %u ",
__func__, rctx->is_final, local_nbuf);
if (ctx->max_payload == SPU_MAX_PAYLOAD_INF)
flow_log("max_payload infinite\n");
else
flow_log("max_payload %u\n", ctx->max_payload);
flow_log("chunk_start: %u chunk_size: %u\n", chunk_start, chunksize);
/* Prepend SPU header with type 3 BCM header */
memcpy(rctx->msg_buf.bcm_spu_req_hdr, BCMHEADER, BCM_HDR_LEN);
hash_parms.prebuf_len = local_nbuf;
spu_hdr_len = spu->spu_create_request(rctx->msg_buf.bcm_spu_req_hdr +
BCM_HDR_LEN,
&req_opts, &cipher_parms,
&hash_parms, &aead_parms,
new_data_len);
if (spu_hdr_len == 0) {
pr_err("Failed to create SPU request header\n");
return -EFAULT;
}
/*
* Determine total length of padding required. Put all padding in one
* buffer.
*/
data_pad_len = spu->spu_gcm_ccm_pad_len(ctx->cipher.mode, chunksize);
db_size = spu_real_db_size(0, 0, local_nbuf, new_data_len,
0, 0, hash_parms.pad_len);
if (spu->spu_tx_status_len())
stat_pad_len = spu->spu_wordalign_padlen(db_size);
if (stat_pad_len)
rx_frag_num++;
pad_len = hash_parms.pad_len + data_pad_len + stat_pad_len;
if (pad_len) {
tx_frag_num++;
spu->spu_request_pad(rctx->msg_buf.spu_req_pad, data_pad_len,
hash_parms.pad_len, ctx->auth.alg,
ctx->auth.mode, rctx->total_sent,
stat_pad_len);
}
spu->spu_dump_msg_hdr(rctx->msg_buf.bcm_spu_req_hdr + BCM_HDR_LEN,
spu_hdr_len);
packet_dump(" prebuf: ", rctx->hash_carry, local_nbuf);
flow_log("Data:\n");
dump_sg(rctx->src_sg, rctx->src_skip, new_data_len);
packet_dump(" pad: ", rctx->msg_buf.spu_req_pad, pad_len);
/*
* Build mailbox message containing SPU request msg and rx buffers
* to catch response message
*/
memset(mssg, 0, sizeof(*mssg));
mssg->type = BRCM_MESSAGE_SPU;
mssg->ctx = rctx; /* Will be returned in response */
/* Create rx scatterlist to catch result */
err = spu_ahash_rx_sg_create(mssg, rctx, rx_frag_num, digestsize,
stat_pad_len);
if (err)
return err;
/* Create tx scatterlist containing SPU request message */
tx_frag_num += rctx->src_nents;
if (spu->spu_tx_status_len())
tx_frag_num++;
err = spu_ahash_tx_sg_create(mssg, rctx, tx_frag_num, spu_hdr_len,
local_nbuf, new_data_len, pad_len);
if (err)
return err;
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
return -EINPROGRESS;
}
/**
* spu_hmac_outer_hash() - Request synchonous software compute of the outer hash
* for an HMAC request.
* @req: The HMAC request from the crypto API
* @ctx: The session context
*
* Return: 0 if synchronous hash operation successful
* -EINVAL if the hash algo is unrecognized
* any other value indicates an error
*/
static int spu_hmac_outer_hash(struct ahash_request *req,
struct iproc_ctx_s *ctx)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
unsigned int blocksize =
crypto_tfm_alg_blocksize(crypto_ahash_tfm(ahash));
int rc;
switch (ctx->auth.alg) {
case HASH_ALG_MD5:
rc = do_shash("md5", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
case HASH_ALG_SHA1:
rc = do_shash("sha1", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
case HASH_ALG_SHA224:
rc = do_shash("sha224", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
case HASH_ALG_SHA256:
rc = do_shash("sha256", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
case HASH_ALG_SHA384:
rc = do_shash("sha384", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
case HASH_ALG_SHA512:
rc = do_shash("sha512", req->result, ctx->opad, blocksize,
req->result, ctx->digestsize, NULL, 0);
break;
default:
pr_err("%s() Error : unknown hmac type\n", __func__);
rc = -EINVAL;
}
return rc;
}
/**
* ahash_req_done() - Process a hash result from the SPU hardware.
* @rctx: Crypto request context
*
* Return: 0 if successful
* < 0 if an error
*/
static int ahash_req_done(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_async_request *areq = rctx->parent;
struct ahash_request *req = ahash_request_cast(areq);
struct iproc_ctx_s *ctx = rctx->ctx;
int err;
memcpy(req->result, rctx->msg_buf.digest, ctx->digestsize);
if (spu->spu_type == SPU_TYPE_SPUM) {
/* byte swap the output from the UPDT function to network byte
* order
*/
if (ctx->auth.alg == HASH_ALG_MD5) {
__swab32s((u32 *)req->result);
__swab32s(((u32 *)req->result) + 1);
__swab32s(((u32 *)req->result) + 2);
__swab32s(((u32 *)req->result) + 3);
__swab32s(((u32 *)req->result) + 4);
}
}
flow_dump(" digest ", req->result, ctx->digestsize);
/* if this an HMAC then do the outer hash */
if (rctx->is_sw_hmac) {
err = spu_hmac_outer_hash(req, ctx);
if (err < 0)
return err;
flow_dump(" hmac: ", req->result, ctx->digestsize);
}
if (rctx->is_sw_hmac || ctx->auth.mode == HASH_MODE_HMAC) {
atomic_inc(&iproc_priv.op_counts[SPU_OP_HMAC]);
atomic_inc(&iproc_priv.hmac_cnt[ctx->auth.alg]);
} else {
atomic_inc(&iproc_priv.op_counts[SPU_OP_HASH]);
atomic_inc(&iproc_priv.hash_cnt[ctx->auth.alg]);
}
return 0;
}
/**
* handle_ahash_resp() - Process a SPU response message for a hash request.
* Checks if the entire crypto API request has been processed, and if so,
* invokes post processing on the result.
* @rctx: Crypto request context
*/
static void handle_ahash_resp(struct iproc_reqctx_s *rctx)
{
struct iproc_ctx_s *ctx = rctx->ctx;
#ifdef DEBUG
struct crypto_async_request *areq = rctx->parent;
struct ahash_request *req = ahash_request_cast(areq);
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
unsigned int blocksize =
crypto_tfm_alg_blocksize(crypto_ahash_tfm(ahash));
#endif
/*
* Save hash to use as input to next op if incremental. Might be copying
* too much, but that's easier than figuring out actual digest size here
*/
memcpy(rctx->incr_hash, rctx->msg_buf.digest, MAX_DIGEST_SIZE);
flow_log("%s() blocksize:%u digestsize:%u\n",
__func__, blocksize, ctx->digestsize);
atomic64_add(ctx->digestsize, &iproc_priv.bytes_in);
if (rctx->is_final && (rctx->total_sent == rctx->total_todo))
ahash_req_done(rctx);
}
/**
* spu_aead_rx_sg_create() - Build up the scatterlist of buffers used to receive
* a SPU response message for an AEAD request. Includes buffers to catch SPU
* message headers and the response data.
* @mssg: mailbox message containing the receive sg
* @rctx: crypto request context
* @rx_frag_num: number of scatterlist elements required to hold the
* SPU response message
* @assoc_len: Length of associated data included in the crypto request
* @ret_iv_len: Length of IV returned in response
* @resp_len: Number of bytes of response data expected to be written to
* dst buffer from crypto API
* @digestsize: Length of hash digest, in bytes
* @stat_pad_len: Number of bytes required to pad the STAT field to
* a 4-byte boundary
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Returns:
* 0 if successful
* < 0 if an error
*/
static int spu_aead_rx_sg_create(struct brcm_message *mssg,
struct aead_request *req,
struct iproc_reqctx_s *rctx,
u8 rx_frag_num,
unsigned int assoc_len,
u32 ret_iv_len, unsigned int resp_len,
unsigned int digestsize, u32 stat_pad_len)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
struct iproc_ctx_s *ctx = rctx->ctx;
u32 datalen; /* Number of bytes of response data expected */
u32 assoc_buf_len;
u8 data_padlen = 0;
if (ctx->is_rfc4543) {
/* RFC4543: only pad after data, not after AAD */
data_padlen = spu->spu_gcm_ccm_pad_len(ctx->cipher.mode,
assoc_len + resp_len);
assoc_buf_len = assoc_len;
} else {
data_padlen = spu->spu_gcm_ccm_pad_len(ctx->cipher.mode,
resp_len);
assoc_buf_len = spu->spu_assoc_resp_len(ctx->cipher.mode,
assoc_len, ret_iv_len,
rctx->is_encrypt);
}
if (ctx->cipher.mode == CIPHER_MODE_CCM)
/* ICV (after data) must be in the next 32-bit word for CCM */
data_padlen += spu->spu_wordalign_padlen(assoc_buf_len +
resp_len +
data_padlen);
if (data_padlen)
/* have to catch gcm pad in separate buffer */
rx_frag_num++;
mssg->spu.dst = kcalloc(rx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (!mssg->spu.dst)
return -ENOMEM;
sg = mssg->spu.dst;
sg_init_table(sg, rx_frag_num);
/* Space for SPU message header */
sg_set_buf(sg++, rctx->msg_buf.spu_resp_hdr, ctx->spu_resp_hdr_len);
if (assoc_buf_len) {
/*
* Don't write directly to req->dst, because SPU may pad the
* assoc data in the response
*/
memset(rctx->msg_buf.a.resp_aad, 0, assoc_buf_len);
sg_set_buf(sg++, rctx->msg_buf.a.resp_aad, assoc_buf_len);
}
if (resp_len) {
/*
* Copy in each dst sg entry from request, up to chunksize.
* dst sg catches just the data. digest caught in separate buf.
*/
datalen = spu_msg_sg_add(&sg, &rctx->dst_sg, &rctx->dst_skip,
rctx->dst_nents, resp_len);
if (datalen < (resp_len)) {
pr_err("%s(): failed to copy dst sg to mbox msg. expected len %u, datalen %u",
__func__, resp_len, datalen);
return -EFAULT;
}
}
/* If GCM/CCM data is padded, catch padding in separate buffer */
if (data_padlen) {
memset(rctx->msg_buf.a.gcmpad, 0, data_padlen);
sg_set_buf(sg++, rctx->msg_buf.a.gcmpad, data_padlen);
}
/* Always catch ICV in separate buffer */
sg_set_buf(sg++, rctx->msg_buf.digest, digestsize);
flow_log("stat_pad_len %u\n", stat_pad_len);
if (stat_pad_len) {
memset(rctx->msg_buf.rx_stat_pad, 0, stat_pad_len);
sg_set_buf(sg++, rctx->msg_buf.rx_stat_pad, stat_pad_len);
}
memset(rctx->msg_buf.rx_stat, 0, SPU_RX_STATUS_LEN);
sg_set_buf(sg, rctx->msg_buf.rx_stat, spu->spu_rx_status_len());
return 0;
}
/**
* spu_aead_tx_sg_create() - Build up the scatterlist of buffers used to send a
* SPU request message for an AEAD request. Includes SPU message headers and the
* request data.
* @mssg: mailbox message containing the transmit sg
* @rctx: crypto request context
* @tx_frag_num: number of scatterlist elements required to construct the
* SPU request message
* @spu_hdr_len: length of SPU message header in bytes
* @assoc: crypto API associated data scatterlist
* @assoc_len: length of associated data
* @assoc_nents: number of scatterlist entries containing assoc data
* @aead_iv_len: length of AEAD IV, if included
* @chunksize: Number of bytes of request data
* @aad_pad_len: Number of bytes of padding at end of AAD. For GCM/CCM.
* @pad_len: Number of pad bytes
* @incl_icv: If true, write separate ICV buffer after data and
* any padding
*
* The scatterlist that gets allocated here is freed in spu_chunk_cleanup()
* when the request completes, whether the request is handled successfully or
* there is an error.
*
* Return:
* 0 if successful
* < 0 if an error
*/
static int spu_aead_tx_sg_create(struct brcm_message *mssg,
struct iproc_reqctx_s *rctx,
u8 tx_frag_num,
u32 spu_hdr_len,
struct scatterlist *assoc,
unsigned int assoc_len,
int assoc_nents,
unsigned int aead_iv_len,
unsigned int chunksize,
u32 aad_pad_len, u32 pad_len, bool incl_icv)
{
struct spu_hw *spu = &iproc_priv.spu;
struct scatterlist *sg; /* used to build sgs in mbox message */
struct scatterlist *assoc_sg = assoc;
struct iproc_ctx_s *ctx = rctx->ctx;
u32 datalen; /* Number of bytes of data to write */
u32 written; /* Number of bytes of data written */
u32 assoc_offset = 0;
u32 stat_len;
mssg->spu.src = kcalloc(tx_frag_num, sizeof(struct scatterlist),
rctx->gfp);
if (!mssg->spu.src)
return -ENOMEM;
sg = mssg->spu.src;
sg_init_table(sg, tx_frag_num);
sg_set_buf(sg++, rctx->msg_buf.bcm_spu_req_hdr,
BCM_HDR_LEN + spu_hdr_len);
if (assoc_len) {
/* Copy in each associated data sg entry from request */
written = spu_msg_sg_add(&sg, &assoc_sg, &assoc_offset,
assoc_nents, assoc_len);
if (written < assoc_len) {
pr_err("%s(): failed to copy assoc sg to mbox msg",
__func__);
return -EFAULT;
}
}
if (aead_iv_len)
sg_set_buf(sg++, rctx->msg_buf.iv_ctr, aead_iv_len);
if (aad_pad_len) {
memset(rctx->msg_buf.a.req_aad_pad, 0, aad_pad_len);
sg_set_buf(sg++, rctx->msg_buf.a.req_aad_pad, aad_pad_len);
}
datalen = chunksize;
if ((chunksize > ctx->digestsize) && incl_icv)
datalen -= ctx->digestsize;
if (datalen) {
/* For aead, a single msg should consume the entire src sg */
written = spu_msg_sg_add(&sg, &rctx->src_sg, &rctx->src_skip,
rctx->src_nents, datalen);
if (written < datalen) {
pr_err("%s(): failed to copy src sg to mbox msg",
__func__);
return -EFAULT;
}
}
if (pad_len) {
memset(rctx->msg_buf.spu_req_pad, 0, pad_len);
sg_set_buf(sg++, rctx->msg_buf.spu_req_pad, pad_len);
}
if (incl_icv)
sg_set_buf(sg++, rctx->msg_buf.digest, ctx->digestsize);
stat_len = spu->spu_tx_status_len();
if (stat_len) {
memset(rctx->msg_buf.tx_stat, 0, stat_len);
sg_set_buf(sg, rctx->msg_buf.tx_stat, stat_len);
}
return 0;
}
/**
* handle_aead_req() - Submit a SPU request message for the next chunk of the
* current AEAD request.
* @rctx: Crypto request context
*
* Unlike other operation types, we assume the length of the request fits in
* a single SPU request message. aead_enqueue() makes sure this is true.
* Comments for other op types regarding threads applies here as well.
*
* Unlike incremental hash ops, where the spu returns the entire hash for
* truncated algs like sha-224, the SPU returns just the truncated hash in
* response to aead requests. So digestsize is always ctx->digestsize here.
*
* Return: -EINPROGRESS: crypto request has been accepted and result will be
* returned asynchronously
* Any other value indicates an error
*/
static int handle_aead_req(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_async_request *areq = rctx->parent;
struct aead_request *req = container_of(areq,
struct aead_request, base);
struct iproc_ctx_s *ctx = rctx->ctx;
int err;
unsigned int chunksize;
unsigned int resp_len;
u32 spu_hdr_len;
u32 db_size;
u32 stat_pad_len;
u32 pad_len;
struct brcm_message *mssg; /* mailbox message */
struct spu_request_opts req_opts;
struct spu_cipher_parms cipher_parms;
struct spu_hash_parms hash_parms;
struct spu_aead_parms aead_parms;
int assoc_nents = 0;
bool incl_icv = false;
unsigned int digestsize = ctx->digestsize;
/* number of entries in src and dst sg. Always includes SPU msg header.
*/
u8 rx_frag_num = 2; /* and STATUS */
u8 tx_frag_num = 1;
/* doing the whole thing at once */
chunksize = rctx->total_todo;
flow_log("%s: chunksize %u\n", __func__, chunksize);
memset(&req_opts, 0, sizeof(req_opts));
memset(&hash_parms, 0, sizeof(hash_parms));
memset(&aead_parms, 0, sizeof(aead_parms));
req_opts.is_inbound = !(rctx->is_encrypt);
req_opts.auth_first = ctx->auth_first;
req_opts.is_aead = true;
req_opts.is_esp = ctx->is_esp;
cipher_parms.alg = ctx->cipher.alg;
cipher_parms.mode = ctx->cipher.mode;
cipher_parms.type = ctx->cipher_type;
cipher_parms.key_buf = ctx->enckey;
cipher_parms.key_len = ctx->enckeylen;
cipher_parms.iv_buf = rctx->msg_buf.iv_ctr;
cipher_parms.iv_len = rctx->iv_ctr_len;
hash_parms.alg = ctx->auth.alg;
hash_parms.mode = ctx->auth.mode;
hash_parms.type = HASH_TYPE_NONE;
hash_parms.key_buf = (u8 *)ctx->authkey;
hash_parms.key_len = ctx->authkeylen;
hash_parms.digestsize = digestsize;
if ((ctx->auth.alg == HASH_ALG_SHA224) &&
(ctx->authkeylen < SHA224_DIGEST_SIZE))
hash_parms.key_len = SHA224_DIGEST_SIZE;
aead_parms.assoc_size = req->assoclen;
if (ctx->is_esp && !ctx->is_rfc4543) {
/*
* 8-byte IV is included assoc data in request. SPU2
* expects AAD to include just SPI and seqno. So
* subtract off the IV len.
*/
aead_parms.assoc_size -= GCM_RFC4106_IV_SIZE;
if (rctx->is_encrypt) {
aead_parms.return_iv = true;
aead_parms.ret_iv_len = GCM_RFC4106_IV_SIZE;
aead_parms.ret_iv_off = GCM_ESP_SALT_SIZE;
}
} else {
aead_parms.ret_iv_len = 0;
}
/*
* Count number of sg entries from the crypto API request that are to
* be included in this mailbox message. For dst sg, don't count space
* for digest. Digest gets caught in a separate buffer and copied back
* to dst sg when processing response.
*/
rctx->src_nents = spu_sg_count(rctx->src_sg, rctx->src_skip, chunksize);
rctx->dst_nents = spu_sg_count(rctx->dst_sg, rctx->dst_skip, chunksize);
if (aead_parms.assoc_size)
assoc_nents = spu_sg_count(rctx->assoc, 0,
aead_parms.assoc_size);
mssg = &rctx->mb_mssg;
rctx->total_sent = chunksize;
rctx->src_sent = chunksize;
if (spu->spu_assoc_resp_len(ctx->cipher.mode,
aead_parms.assoc_size,
aead_parms.ret_iv_len,
rctx->is_encrypt))
rx_frag_num++;
aead_parms.iv_len = spu->spu_aead_ivlen(ctx->cipher.mode,
rctx->iv_ctr_len);
if (ctx->auth.alg == HASH_ALG_AES)
hash_parms.type = (enum hash_type)ctx->cipher_type;
/* General case AAD padding (CCM and RFC4543 special cases below) */
aead_parms.aad_pad_len = spu->spu_gcm_ccm_pad_len(ctx->cipher.mode,
aead_parms.assoc_size);
/* General case data padding (CCM decrypt special case below) */
aead_parms.data_pad_len = spu->spu_gcm_ccm_pad_len(ctx->cipher.mode,
chunksize);
if (ctx->cipher.mode == CIPHER_MODE_CCM) {
/*
* for CCM, AAD len + 2 (rather than AAD len) needs to be
* 128-bit aligned
*/
aead_parms.aad_pad_len = spu->spu_gcm_ccm_pad_len(
ctx->cipher.mode,
aead_parms.assoc_size + 2);
/*
* And when decrypting CCM, need to pad without including
* size of ICV which is tacked on to end of chunk
*/
if (!rctx->is_encrypt)
aead_parms.data_pad_len =
spu->spu_gcm_ccm_pad_len(ctx->cipher.mode,
chunksize - digestsize);
/* CCM also requires software to rewrite portions of IV: */
spu->spu_ccm_update_iv(digestsize, &cipher_parms, req->assoclen,
chunksize, rctx->is_encrypt,
ctx->is_esp);
}
if (ctx->is_rfc4543) {
/*
* RFC4543: data is included in AAD, so don't pad after AAD
* and pad data based on both AAD + data size
*/
aead_parms.aad_pad_len = 0;
if (!rctx->is_encrypt)
aead_parms.data_pad_len = spu->spu_gcm_ccm_pad_len(
ctx->cipher.mode,
aead_parms.assoc_size + chunksize -
digestsize);
else
aead_parms.data_pad_len = spu->spu_gcm_ccm_pad_len(
ctx->cipher.mode,
aead_parms.assoc_size + chunksize);
req_opts.is_rfc4543 = true;
}
if (spu_req_incl_icv(ctx->cipher.mode, rctx->is_encrypt)) {
incl_icv = true;
tx_frag_num++;
/* Copy ICV from end of src scatterlist to digest buf */
sg_copy_part_to_buf(req->src, rctx->msg_buf.digest, digestsize,
req->assoclen + rctx->total_sent -
digestsize);
}
atomic64_add(chunksize, &iproc_priv.bytes_out);
flow_log("%s()-sent chunksize:%u\n", __func__, chunksize);
/* Prepend SPU header with type 3 BCM header */
memcpy(rctx->msg_buf.bcm_spu_req_hdr, BCMHEADER, BCM_HDR_LEN);
spu_hdr_len = spu->spu_create_request(rctx->msg_buf.bcm_spu_req_hdr +
BCM_HDR_LEN, &req_opts,
&cipher_parms, &hash_parms,
&aead_parms, chunksize);
/* Determine total length of padding. Put all padding in one buffer. */
db_size = spu_real_db_size(aead_parms.assoc_size, aead_parms.iv_len, 0,
chunksize, aead_parms.aad_pad_len,
aead_parms.data_pad_len, 0);
stat_pad_len = spu->spu_wordalign_padlen(db_size);
if (stat_pad_len)
rx_frag_num++;
pad_len = aead_parms.data_pad_len + stat_pad_len;
if (pad_len) {
tx_frag_num++;
spu->spu_request_pad(rctx->msg_buf.spu_req_pad,
aead_parms.data_pad_len, 0,
ctx->auth.alg, ctx->auth.mode,
rctx->total_sent, stat_pad_len);
}
spu->spu_dump_msg_hdr(rctx->msg_buf.bcm_spu_req_hdr + BCM_HDR_LEN,
spu_hdr_len);
dump_sg(rctx->assoc, 0, aead_parms.assoc_size);
packet_dump(" aead iv: ", rctx->msg_buf.iv_ctr, aead_parms.iv_len);
packet_log("BD:\n");
dump_sg(rctx->src_sg, rctx->src_skip, chunksize);
packet_dump(" pad: ", rctx->msg_buf.spu_req_pad, pad_len);
/*
* Build mailbox message containing SPU request msg and rx buffers
* to catch response message
*/
memset(mssg, 0, sizeof(*mssg));
mssg->type = BRCM_MESSAGE_SPU;
mssg->ctx = rctx; /* Will be returned in response */
/* Create rx scatterlist to catch result */
rx_frag_num += rctx->dst_nents;
resp_len = chunksize;
/*
* Always catch ICV in separate buffer. Have to for GCM/CCM because of
* padding. Have to for SHA-224 and other truncated SHAs because SPU
* sends entire digest back.
*/
rx_frag_num++;
if (((ctx->cipher.mode == CIPHER_MODE_GCM) ||
(ctx->cipher.mode == CIPHER_MODE_CCM)) && !rctx->is_encrypt) {
/*
* Input is ciphertxt plus ICV, but ICV not incl
* in output.
*/
resp_len -= ctx->digestsize;
if (resp_len == 0)
/* no rx frags to catch output data */
rx_frag_num -= rctx->dst_nents;
}
err = spu_aead_rx_sg_create(mssg, req, rctx, rx_frag_num,
aead_parms.assoc_size,
aead_parms.ret_iv_len, resp_len, digestsize,
stat_pad_len);
if (err)
return err;
/* Create tx scatterlist containing SPU request message */
tx_frag_num += rctx->src_nents;
tx_frag_num += assoc_nents;
if (aead_parms.aad_pad_len)
tx_frag_num++;
if (aead_parms.iv_len)
tx_frag_num++;
if (spu->spu_tx_status_len())
tx_frag_num++;
err = spu_aead_tx_sg_create(mssg, rctx, tx_frag_num, spu_hdr_len,
rctx->assoc, aead_parms.assoc_size,
assoc_nents, aead_parms.iv_len, chunksize,
aead_parms.aad_pad_len, pad_len, incl_icv);
if (err)
return err;
err = mailbox_send_message(mssg, req->base.flags, rctx->chan_idx);
if (unlikely(err < 0))
return err;
return -EINPROGRESS;
}
/**
* handle_aead_resp() - Process a SPU response message for an AEAD request.
* @rctx: Crypto request context
*/
static void handle_aead_resp(struct iproc_reqctx_s *rctx)
{
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_async_request *areq = rctx->parent;
struct aead_request *req = container_of(areq,
struct aead_request, base);
struct iproc_ctx_s *ctx = rctx->ctx;
u32 payload_len;
unsigned int icv_offset;
u32 result_len;
/* See how much data was returned */
payload_len = spu->spu_payload_length(rctx->msg_buf.spu_resp_hdr);
flow_log("payload_len %u\n", payload_len);
/* only count payload */
atomic64_add(payload_len, &iproc_priv.bytes_in);
if (req->assoclen)
packet_dump(" assoc_data ", rctx->msg_buf.a.resp_aad,
req->assoclen);
/*
* Copy the ICV back to the destination
* buffer. In decrypt case, SPU gives us back the digest, but crypto
* API doesn't expect ICV in dst buffer.
*/
result_len = req->cryptlen;
if (rctx->is_encrypt) {
icv_offset = req->assoclen + rctx->total_sent;
packet_dump(" ICV: ", rctx->msg_buf.digest, ctx->digestsize);
flow_log("copying ICV to dst sg at offset %u\n", icv_offset);
sg_copy_part_from_buf(req->dst, rctx->msg_buf.digest,
ctx->digestsize, icv_offset);
result_len += ctx->digestsize;
}
packet_log("response data: ");
dump_sg(req->dst, req->assoclen, result_len);
atomic_inc(&iproc_priv.op_counts[SPU_OP_AEAD]);
if (ctx->cipher.alg == CIPHER_ALG_AES) {
if (ctx->cipher.mode == CIPHER_MODE_CCM)
atomic_inc(&iproc_priv.aead_cnt[AES_CCM]);
else if (ctx->cipher.mode == CIPHER_MODE_GCM)
atomic_inc(&iproc_priv.aead_cnt[AES_GCM]);
else
atomic_inc(&iproc_priv.aead_cnt[AUTHENC]);
} else {
atomic_inc(&iproc_priv.aead_cnt[AUTHENC]);
}
}
/**
* spu_chunk_cleanup() - Do cleanup after processing one chunk of a request
* @rctx: request context
*
* Mailbox scatterlists are allocated for each chunk. So free them after
* processing each chunk.
*/
static void spu_chunk_cleanup(struct iproc_reqctx_s *rctx)
{
/* mailbox message used to tx request */
struct brcm_message *mssg = &rctx->mb_mssg;
kfree(mssg->spu.src);
kfree(mssg->spu.dst);
memset(mssg, 0, sizeof(struct brcm_message));
}
/**
* finish_req() - Used to invoke the complete callback from the requester when
* a request has been handled asynchronously.
* @rctx: Request context
* @err: Indicates whether the request was successful or not
*
* Ensures that cleanup has been done for request
*/
static void finish_req(struct iproc_reqctx_s *rctx, int err)
{
struct crypto_async_request *areq = rctx->parent;
flow_log("%s() err:%d\n\n", __func__, err);
/* No harm done if already called */
spu_chunk_cleanup(rctx);
if (areq)
areq->complete(areq, err);
}
/**
* spu_rx_callback() - Callback from mailbox framework with a SPU response.
* @cl: mailbox client structure for SPU driver
* @msg: mailbox message containing SPU response
*/
static void spu_rx_callback(struct mbox_client *cl, void *msg)
{
struct spu_hw *spu = &iproc_priv.spu;
struct brcm_message *mssg = msg;
struct iproc_reqctx_s *rctx;
int err = 0;
rctx = mssg->ctx;
if (unlikely(!rctx)) {
/* This is fatal */
pr_err("%s(): no request context", __func__);
err = -EFAULT;
goto cb_finish;
}
/* process the SPU status */
err = spu->spu_status_process(rctx->msg_buf.rx_stat);
if (err != 0) {
if (err == SPU_INVALID_ICV)
atomic_inc(&iproc_priv.bad_icv);
err = -EBADMSG;
goto cb_finish;
}
/* Process the SPU response message */
switch (rctx->ctx->alg->type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
handle_skcipher_resp(rctx);
break;
case CRYPTO_ALG_TYPE_AHASH:
handle_ahash_resp(rctx);
break;
case CRYPTO_ALG_TYPE_AEAD:
handle_aead_resp(rctx);
break;
default:
err = -EINVAL;
goto cb_finish;
}
/*
* If this response does not complete the request, then send the next
* request chunk.
*/
if (rctx->total_sent < rctx->total_todo) {
/* Deallocate anything specific to previous chunk */
spu_chunk_cleanup(rctx);
switch (rctx->ctx->alg->type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
err = handle_skcipher_req(rctx);
break;
case CRYPTO_ALG_TYPE_AHASH:
err = handle_ahash_req(rctx);
if (err == -EAGAIN)
/*
* we saved data in hash carry, but tell crypto
* API we successfully completed request.
*/
err = 0;
break;
case CRYPTO_ALG_TYPE_AEAD:
err = handle_aead_req(rctx);
break;
default:
err = -EINVAL;
}
if (err == -EINPROGRESS)
/* Successfully submitted request for next chunk */
return;
}
cb_finish:
finish_req(rctx, err);
}
/* ==================== Kernel Cryptographic API ==================== */
/**
* skcipher_enqueue() - Handle skcipher encrypt or decrypt request.
* @req: Crypto API request
* @encrypt: true if encrypting; false if decrypting
*
* Return: -EINPROGRESS if request accepted and result will be returned
* asynchronously
* < 0 if an error
*/
static int skcipher_enqueue(struct skcipher_request *req, bool encrypt)
{
struct iproc_reqctx_s *rctx = skcipher_request_ctx(req);
struct iproc_ctx_s *ctx =
crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
int err;
flow_log("%s() enc:%u\n", __func__, encrypt);
rctx->gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
rctx->parent = &req->base;
rctx->is_encrypt = encrypt;
rctx->bd_suppress = false;
rctx->total_todo = req->cryptlen;
rctx->src_sent = 0;
rctx->total_sent = 0;
rctx->total_received = 0;
rctx->ctx = ctx;
/* Initialize current position in src and dst scatterlists */
rctx->src_sg = req->src;
rctx->src_nents = 0;
rctx->src_skip = 0;
rctx->dst_sg = req->dst;
rctx->dst_nents = 0;
rctx->dst_skip = 0;
if (ctx->cipher.mode == CIPHER_MODE_CBC ||
ctx->cipher.mode == CIPHER_MODE_CTR ||
ctx->cipher.mode == CIPHER_MODE_OFB ||
ctx->cipher.mode == CIPHER_MODE_XTS ||
ctx->cipher.mode == CIPHER_MODE_GCM ||
ctx->cipher.mode == CIPHER_MODE_CCM) {
rctx->iv_ctr_len =
crypto_skcipher_ivsize(crypto_skcipher_reqtfm(req));
memcpy(rctx->msg_buf.iv_ctr, req->iv, rctx->iv_ctr_len);
} else {
rctx->iv_ctr_len = 0;
}
/* Choose a SPU to process this request */
rctx->chan_idx = select_channel();
err = handle_skcipher_req(rctx);
if (err != -EINPROGRESS)
/* synchronous result */
spu_chunk_cleanup(rctx);
return err;
}
static int des_setkey(struct crypto_skcipher *cipher, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_skcipher_ctx(cipher);
int err;
err = verify_skcipher_des_key(cipher, key);
if (err)
return err;
ctx->cipher_type = CIPHER_TYPE_DES;
return 0;
}
static int threedes_setkey(struct crypto_skcipher *cipher, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_skcipher_ctx(cipher);
int err;
err = verify_skcipher_des3_key(cipher, key);
if (err)
return err;
ctx->cipher_type = CIPHER_TYPE_3DES;
return 0;
}
static int aes_setkey(struct crypto_skcipher *cipher, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_skcipher_ctx(cipher);
if (ctx->cipher.mode == CIPHER_MODE_XTS)
/* XTS includes two keys of equal length */
keylen = keylen / 2;
switch (keylen) {
case AES_KEYSIZE_128:
ctx->cipher_type = CIPHER_TYPE_AES128;
break;
case AES_KEYSIZE_192:
ctx->cipher_type = CIPHER_TYPE_AES192;
break;
case AES_KEYSIZE_256:
ctx->cipher_type = CIPHER_TYPE_AES256;
break;
default:
crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
WARN_ON((ctx->max_payload != SPU_MAX_PAYLOAD_INF) &&
((ctx->max_payload % AES_BLOCK_SIZE) != 0));
return 0;
}
static int rc4_setkey(struct crypto_skcipher *cipher, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_skcipher_ctx(cipher);
int i;
ctx->enckeylen = ARC4_MAX_KEY_SIZE + ARC4_STATE_SIZE;
ctx->enckey[0] = 0x00; /* 0x00 */
ctx->enckey[1] = 0x00; /* i */
ctx->enckey[2] = 0x00; /* 0x00 */
ctx->enckey[3] = 0x00; /* j */
for (i = 0; i < ARC4_MAX_KEY_SIZE; i++)
ctx->enckey[i + ARC4_STATE_SIZE] = key[i % keylen];
ctx->cipher_type = CIPHER_TYPE_INIT;
return 0;
}
static int skcipher_setkey(struct crypto_skcipher *cipher, const u8 *key,
unsigned int keylen)
{
struct spu_hw *spu = &iproc_priv.spu;
struct iproc_ctx_s *ctx = crypto_skcipher_ctx(cipher);
struct spu_cipher_parms cipher_parms;
u32 alloc_len = 0;
int err;
flow_log("skcipher_setkey() keylen: %d\n", keylen);
flow_dump(" key: ", key, keylen);
switch (ctx->cipher.alg) {
case CIPHER_ALG_DES:
err = des_setkey(cipher, key, keylen);
break;
case CIPHER_ALG_3DES:
err = threedes_setkey(cipher, key, keylen);
break;
case CIPHER_ALG_AES:
err = aes_setkey(cipher, key, keylen);
break;
case CIPHER_ALG_RC4:
err = rc4_setkey(cipher, key, keylen);
break;
default:
pr_err("%s() Error: unknown cipher alg\n", __func__);
err = -EINVAL;
}
if (err)
return err;
/* RC4 already populated ctx->enkey */
if (ctx->cipher.alg != CIPHER_ALG_RC4) {
memcpy(ctx->enckey, key, keylen);
ctx->enckeylen = keylen;
}
/* SPU needs XTS keys in the reverse order the crypto API presents */
if ((ctx->cipher.alg == CIPHER_ALG_AES) &&
(ctx->cipher.mode == CIPHER_MODE_XTS)) {
unsigned int xts_keylen = keylen / 2;
memcpy(ctx->enckey, key + xts_keylen, xts_keylen);
memcpy(ctx->enckey + xts_keylen, key, xts_keylen);
}
if (spu->spu_type == SPU_TYPE_SPUM)
alloc_len = BCM_HDR_LEN + SPU_HEADER_ALLOC_LEN;
else if (spu->spu_type == SPU_TYPE_SPU2)
alloc_len = BCM_HDR_LEN + SPU2_HEADER_ALLOC_LEN;
memset(ctx->bcm_spu_req_hdr, 0, alloc_len);
cipher_parms.iv_buf = NULL;
cipher_parms.iv_len = crypto_skcipher_ivsize(cipher);
flow_log("%s: iv_len %u\n", __func__, cipher_parms.iv_len);
cipher_parms.alg = ctx->cipher.alg;
cipher_parms.mode = ctx->cipher.mode;
cipher_parms.type = ctx->cipher_type;
cipher_parms.key_buf = ctx->enckey;
cipher_parms.key_len = ctx->enckeylen;
/* Prepend SPU request message with BCM header */
memcpy(ctx->bcm_spu_req_hdr, BCMHEADER, BCM_HDR_LEN);
ctx->spu_req_hdr_len =
spu->spu_cipher_req_init(ctx->bcm_spu_req_hdr + BCM_HDR_LEN,
&cipher_parms);
ctx->spu_resp_hdr_len = spu->spu_response_hdr_len(ctx->authkeylen,
ctx->enckeylen,
false);
atomic_inc(&iproc_priv.setkey_cnt[SPU_OP_CIPHER]);
return 0;
}
static int skcipher_encrypt(struct skcipher_request *req)
{
flow_log("skcipher_encrypt() nbytes:%u\n", req->cryptlen);
return skcipher_enqueue(req, true);
}
static int skcipher_decrypt(struct skcipher_request *req)
{
flow_log("skcipher_decrypt() nbytes:%u\n", req->cryptlen);
return skcipher_enqueue(req, false);
}
static int ahash_enqueue(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
int err = 0;
const char *alg_name;
flow_log("ahash_enqueue() nbytes:%u\n", req->nbytes);
rctx->gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
rctx->parent = &req->base;
rctx->ctx = ctx;
rctx->bd_suppress = true;
memset(&rctx->mb_mssg, 0, sizeof(struct brcm_message));
/* Initialize position in src scatterlist */
rctx->src_sg = req->src;
rctx->src_skip = 0;
rctx->src_nents = 0;
rctx->dst_sg = NULL;
rctx->dst_skip = 0;
rctx->dst_nents = 0;
/* SPU2 hardware does not compute hash of zero length data */
if ((rctx->is_final == 1) && (rctx->total_todo == 0) &&
(iproc_priv.spu.spu_type == SPU_TYPE_SPU2)) {
alg_name = crypto_tfm_alg_name(crypto_ahash_tfm(tfm));
flow_log("Doing %sfinal %s zero-len hash request in software\n",
rctx->is_final ? "" : "non-", alg_name);
err = do_shash((unsigned char *)alg_name, req->result,
NULL, 0, NULL, 0, ctx->authkey,
ctx->authkeylen);
if (err < 0)
flow_log("Hash request failed with error %d\n", err);
return err;
}
/* Choose a SPU to process this request */
rctx->chan_idx = select_channel();
err = handle_ahash_req(rctx);
if (err != -EINPROGRESS)
/* synchronous result */
spu_chunk_cleanup(rctx);
if (err == -EAGAIN)
/*
* we saved data in hash carry, but tell crypto API
* we successfully completed request.
*/
err = 0;
return err;
}
static int __ahash_init(struct ahash_request *req)
{
struct spu_hw *spu = &iproc_priv.spu;
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
flow_log("%s()\n", __func__);
/* Initialize the context */
rctx->hash_carry_len = 0;
rctx->is_final = 0;
rctx->total_todo = 0;
rctx->src_sent = 0;
rctx->total_sent = 0;
rctx->total_received = 0;
ctx->digestsize = crypto_ahash_digestsize(tfm);
/* If we add a hash whose digest is larger, catch it here. */
WARN_ON(ctx->digestsize > MAX_DIGEST_SIZE);
rctx->is_sw_hmac = false;
ctx->spu_resp_hdr_len = spu->spu_response_hdr_len(ctx->authkeylen, 0,
true);
return 0;
}
/**
* spu_no_incr_hash() - Determine whether incremental hashing is supported.
* @ctx: Crypto session context
*
* SPU-2 does not support incremental hashing (we'll have to revisit and
* condition based on chip revision or device tree entry if future versions do
* support incremental hash)
*
* SPU-M also doesn't support incremental hashing of AES-XCBC
*
* Return: true if incremental hashing is not supported
* false otherwise
*/
static bool spu_no_incr_hash(struct iproc_ctx_s *ctx)
{
struct spu_hw *spu = &iproc_priv.spu;
if (spu->spu_type == SPU_TYPE_SPU2)
return true;
if ((ctx->auth.alg == HASH_ALG_AES) &&
(ctx->auth.mode == HASH_MODE_XCBC))
return true;
/* Otherwise, incremental hashing is supported */
return false;
}
static int ahash_init(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
const char *alg_name;
struct crypto_shash *hash;
int ret;
gfp_t gfp;
if (spu_no_incr_hash(ctx)) {
/*
* If we get an incremental hashing request and it's not
* supported by the hardware, we need to handle it in software
* by calling synchronous hash functions.
*/
alg_name = crypto_tfm_alg_name(crypto_ahash_tfm(tfm));
hash = crypto_alloc_shash(alg_name, 0, 0);
if (IS_ERR(hash)) {
ret = PTR_ERR(hash);
goto err;
}
gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
ctx->shash = kmalloc(sizeof(*ctx->shash) +
crypto_shash_descsize(hash), gfp);
if (!ctx->shash) {
ret = -ENOMEM;
goto err_hash;
}
ctx->shash->tfm = hash;
/* Set the key using data we already have from setkey */
if (ctx->authkeylen > 0) {
ret = crypto_shash_setkey(hash, ctx->authkey,
ctx->authkeylen);
if (ret)
goto err_shash;
}
/* Initialize hash w/ this key and other params */
ret = crypto_shash_init(ctx->shash);
if (ret)
goto err_shash;
} else {
/* Otherwise call the internal function which uses SPU hw */
ret = __ahash_init(req);
}
return ret;
err_shash:
kfree(ctx->shash);
err_hash:
crypto_free_shash(hash);
err:
return ret;
}
static int __ahash_update(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
flow_log("ahash_update() nbytes:%u\n", req->nbytes);
if (!req->nbytes)
return 0;
rctx->total_todo += req->nbytes;
rctx->src_sent = 0;
return ahash_enqueue(req);
}
static int ahash_update(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
u8 *tmpbuf;
int ret;
int nents;
gfp_t gfp;
if (spu_no_incr_hash(ctx)) {
/*
* If we get an incremental hashing request and it's not
* supported by the hardware, we need to handle it in software
* by calling synchronous hash functions.
*/
if (req->src)
nents = sg_nents(req->src);
else
return -EINVAL;
/* Copy data from req scatterlist to tmp buffer */
gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
tmpbuf = kmalloc(req->nbytes, gfp);
if (!tmpbuf)
return -ENOMEM;
if (sg_copy_to_buffer(req->src, nents, tmpbuf, req->nbytes) !=
req->nbytes) {
kfree(tmpbuf);
return -EINVAL;
}
/* Call synchronous update */
ret = crypto_shash_update(ctx->shash, tmpbuf, req->nbytes);
kfree(tmpbuf);
} else {
/* Otherwise call the internal function which uses SPU hw */
ret = __ahash_update(req);
}
return ret;
}
static int __ahash_final(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
flow_log("ahash_final() nbytes:%u\n", req->nbytes);
rctx->is_final = 1;
return ahash_enqueue(req);
}
static int ahash_final(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
int ret;
if (spu_no_incr_hash(ctx)) {
/*
* If we get an incremental hashing request and it's not
* supported by the hardware, we need to handle it in software
* by calling synchronous hash functions.
*/
ret = crypto_shash_final(ctx->shash, req->result);
/* Done with hash, can deallocate it now */
crypto_free_shash(ctx->shash->tfm);
kfree(ctx->shash);
} else {
/* Otherwise call the internal function which uses SPU hw */
ret = __ahash_final(req);
}
return ret;
}
static int __ahash_finup(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
flow_log("ahash_finup() nbytes:%u\n", req->nbytes);
rctx->total_todo += req->nbytes;
rctx->src_sent = 0;
rctx->is_final = 1;
return ahash_enqueue(req);
}
static int ahash_finup(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
u8 *tmpbuf;
int ret;
int nents;
gfp_t gfp;
if (spu_no_incr_hash(ctx)) {
/*
* If we get an incremental hashing request and it's not
* supported by the hardware, we need to handle it in software
* by calling synchronous hash functions.
*/
if (req->src) {
nents = sg_nents(req->src);
} else {
ret = -EINVAL;
goto ahash_finup_exit;
}
/* Copy data from req scatterlist to tmp buffer */
gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
tmpbuf = kmalloc(req->nbytes, gfp);
if (!tmpbuf) {
ret = -ENOMEM;
goto ahash_finup_exit;
}
if (sg_copy_to_buffer(req->src, nents, tmpbuf, req->nbytes) !=
req->nbytes) {
ret = -EINVAL;
goto ahash_finup_free;
}
/* Call synchronous update */
ret = crypto_shash_finup(ctx->shash, tmpbuf, req->nbytes,
req->result);
} else {
/* Otherwise call the internal function which uses SPU hw */
return __ahash_finup(req);
}
ahash_finup_free:
kfree(tmpbuf);
ahash_finup_exit:
/* Done with hash, can deallocate it now */
crypto_free_shash(ctx->shash->tfm);
kfree(ctx->shash);
return ret;
}
static int ahash_digest(struct ahash_request *req)
{
int err = 0;
flow_log("ahash_digest() nbytes:%u\n", req->nbytes);
/* whole thing at once */
err = __ahash_init(req);
if (!err)
err = __ahash_finup(req);
return err;
}
static int ahash_setkey(struct crypto_ahash *ahash, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_ahash_ctx(ahash);
flow_log("%s() ahash:%p key:%p keylen:%u\n",
__func__, ahash, key, keylen);
flow_dump(" key: ", key, keylen);
if (ctx->auth.alg == HASH_ALG_AES) {
switch (keylen) {
case AES_KEYSIZE_128:
ctx->cipher_type = CIPHER_TYPE_AES128;
break;
case AES_KEYSIZE_192:
ctx->cipher_type = CIPHER_TYPE_AES192;
break;
case AES_KEYSIZE_256:
ctx->cipher_type = CIPHER_TYPE_AES256;
break;
default:
pr_err("%s() Error: Invalid key length\n", __func__);
return -EINVAL;
}
} else {
pr_err("%s() Error: unknown hash alg\n", __func__);
return -EINVAL;
}
memcpy(ctx->authkey, key, keylen);
ctx->authkeylen = keylen;
return 0;
}
static int ahash_export(struct ahash_request *req, void *out)
{
const struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct spu_hash_export_s *spu_exp = (struct spu_hash_export_s *)out;
spu_exp->total_todo = rctx->total_todo;
spu_exp->total_sent = rctx->total_sent;
spu_exp->is_sw_hmac = rctx->is_sw_hmac;
memcpy(spu_exp->hash_carry, rctx->hash_carry, sizeof(rctx->hash_carry));
spu_exp->hash_carry_len = rctx->hash_carry_len;
memcpy(spu_exp->incr_hash, rctx->incr_hash, sizeof(rctx->incr_hash));
return 0;
}
static int ahash_import(struct ahash_request *req, const void *in)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct spu_hash_export_s *spu_exp = (struct spu_hash_export_s *)in;
rctx->total_todo = spu_exp->total_todo;
rctx->total_sent = spu_exp->total_sent;
rctx->is_sw_hmac = spu_exp->is_sw_hmac;
memcpy(rctx->hash_carry, spu_exp->hash_carry, sizeof(rctx->hash_carry));
rctx->hash_carry_len = spu_exp->hash_carry_len;
memcpy(rctx->incr_hash, spu_exp->incr_hash, sizeof(rctx->incr_hash));
return 0;
}
static int ahash_hmac_setkey(struct crypto_ahash *ahash, const u8 *key,
unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_ahash_ctx(ahash);
unsigned int blocksize =
crypto_tfm_alg_blocksize(crypto_ahash_tfm(ahash));
unsigned int digestsize = crypto_ahash_digestsize(ahash);
unsigned int index;
int rc;
flow_log("%s() ahash:%p key:%p keylen:%u blksz:%u digestsz:%u\n",
__func__, ahash, key, keylen, blocksize, digestsize);
flow_dump(" key: ", key, keylen);
if (keylen > blocksize) {
switch (ctx->auth.alg) {
case HASH_ALG_MD5:
rc = do_shash("md5", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA1:
rc = do_shash("sha1", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA224:
rc = do_shash("sha224", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA256:
rc = do_shash("sha256", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA384:
rc = do_shash("sha384", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA512:
rc = do_shash("sha512", ctx->authkey, key, keylen, NULL,
0, NULL, 0);
break;
case HASH_ALG_SHA3_224:
rc = do_shash("sha3-224", ctx->authkey, key, keylen,
NULL, 0, NULL, 0);
break;
case HASH_ALG_SHA3_256:
rc = do_shash("sha3-256", ctx->authkey, key, keylen,
NULL, 0, NULL, 0);
break;
case HASH_ALG_SHA3_384:
rc = do_shash("sha3-384", ctx->authkey, key, keylen,
NULL, 0, NULL, 0);
break;
case HASH_ALG_SHA3_512:
rc = do_shash("sha3-512", ctx->authkey, key, keylen,
NULL, 0, NULL, 0);
break;
default:
pr_err("%s() Error: unknown hash alg\n", __func__);
return -EINVAL;
}
if (rc < 0) {
pr_err("%s() Error %d computing shash for %s\n",
__func__, rc, hash_alg_name[ctx->auth.alg]);
return rc;
}
ctx->authkeylen = digestsize;
flow_log(" keylen > digestsize... hashed\n");
flow_dump(" newkey: ", ctx->authkey, ctx->authkeylen);
} else {
memcpy(ctx->authkey, key, keylen);
ctx->authkeylen = keylen;
}
/*
* Full HMAC operation in SPUM is not verified,
* So keeping the generation of IPAD, OPAD and
* outer hashing in software.
*/
if (iproc_priv.spu.spu_type == SPU_TYPE_SPUM) {
memcpy(ctx->ipad, ctx->authkey, ctx->authkeylen);
memset(ctx->ipad + ctx->authkeylen, 0,
blocksize - ctx->authkeylen);
ctx->authkeylen = 0;
memcpy(ctx->opad, ctx->ipad, blocksize);
for (index = 0; index < blocksize; index++) {
ctx->ipad[index] ^= HMAC_IPAD_VALUE;
ctx->opad[index] ^= HMAC_OPAD_VALUE;
}
flow_dump(" ipad: ", ctx->ipad, blocksize);
flow_dump(" opad: ", ctx->opad, blocksize);
}
ctx->digestsize = digestsize;
atomic_inc(&iproc_priv.setkey_cnt[SPU_OP_HMAC]);
return 0;
}
static int ahash_hmac_init(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
unsigned int blocksize =
crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
flow_log("ahash_hmac_init()\n");
/* init the context as a hash */
ahash_init(req);
if (!spu_no_incr_hash(ctx)) {
/* SPU-M can do incr hashing but needs sw for outer HMAC */
rctx->is_sw_hmac = true;
ctx->auth.mode = HASH_MODE_HASH;
/* start with a prepended ipad */
memcpy(rctx->hash_carry, ctx->ipad, blocksize);
rctx->hash_carry_len = blocksize;
rctx->total_todo += blocksize;
}
return 0;
}
static int ahash_hmac_update(struct ahash_request *req)
{
flow_log("ahash_hmac_update() nbytes:%u\n", req->nbytes);
if (!req->nbytes)
return 0;
return ahash_update(req);
}
static int ahash_hmac_final(struct ahash_request *req)
{
flow_log("ahash_hmac_final() nbytes:%u\n", req->nbytes);
return ahash_final(req);
}
static int ahash_hmac_finup(struct ahash_request *req)
{
flow_log("ahash_hmac_finupl() nbytes:%u\n", req->nbytes);
return ahash_finup(req);
}
static int ahash_hmac_digest(struct ahash_request *req)
{
struct iproc_reqctx_s *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm);
unsigned int blocksize =
crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
flow_log("ahash_hmac_digest() nbytes:%u\n", req->nbytes);
/* Perform initialization and then call finup */
__ahash_init(req);
if (iproc_priv.spu.spu_type == SPU_TYPE_SPU2) {
/*
* SPU2 supports full HMAC implementation in the
* hardware, need not to generate IPAD, OPAD and
* outer hash in software.
* Only for hash key len > hash block size, SPU2
* expects to perform hashing on the key, shorten
* it to digest size and feed it as hash key.
*/
rctx->is_sw_hmac = false;
ctx->auth.mode = HASH_MODE_HMAC;
} else {
rctx->is_sw_hmac = true;
ctx->auth.mode = HASH_MODE_HASH;
/* start with a prepended ipad */
memcpy(rctx->hash_carry, ctx->ipad, blocksize);
rctx->hash_carry_len = blocksize;
rctx->total_todo += blocksize;
}
return __ahash_finup(req);
}
/* aead helpers */
static int aead_need_fallback(struct aead_request *req)
{
struct iproc_reqctx_s *rctx = aead_request_ctx(req);
struct spu_hw *spu = &iproc_priv.spu;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_aead_ctx(aead);
u32 payload_len;
/*
* SPU hardware cannot handle the AES-GCM/CCM case where plaintext
* and AAD are both 0 bytes long. So use fallback in this case.
*/
if (((ctx->cipher.mode == CIPHER_MODE_GCM) ||
(ctx->cipher.mode == CIPHER_MODE_CCM)) &&
(req->assoclen == 0)) {
if ((rctx->is_encrypt && (req->cryptlen == 0)) ||
(!rctx->is_encrypt && (req->cryptlen == ctx->digestsize))) {
flow_log("AES GCM/CCM needs fallback for 0 len req\n");
return 1;
}
}
/* SPU-M hardware only supports CCM digest size of 8, 12, or 16 bytes */
if ((ctx->cipher.mode == CIPHER_MODE_CCM) &&
(spu->spu_type == SPU_TYPE_SPUM) &&
(ctx->digestsize != 8) && (ctx->digestsize != 12) &&
(ctx->digestsize != 16)) {
flow_log("%s() AES CCM needs fallback for digest size %d\n",
__func__, ctx->digestsize);
return 1;
}
/*
* SPU-M on NSP has an issue where AES-CCM hash is not correct
* when AAD size is 0
*/
if ((ctx->cipher.mode == CIPHER_MODE_CCM) &&
(spu->spu_subtype == SPU_SUBTYPE_SPUM_NSP) &&
(req->assoclen == 0)) {
flow_log("%s() AES_CCM needs fallback for 0 len AAD on NSP\n",
__func__);
return 1;
}
/*
* RFC4106 and RFC4543 cannot handle the case where AAD is other than
* 16 or 20 bytes long. So use fallback in this case.
*/
if (ctx->cipher.mode == CIPHER_MODE_GCM &&
ctx->cipher.alg == CIPHER_ALG_AES &&
rctx->iv_ctr_len == GCM_RFC4106_IV_SIZE &&
req->assoclen != 16 && req->assoclen != 20) {
flow_log("RFC4106/RFC4543 needs fallback for assoclen"
" other than 16 or 20 bytes\n");
return 1;
}
payload_len = req->cryptlen;
if (spu->spu_type == SPU_TYPE_SPUM)
payload_len += req->assoclen;
flow_log("%s() payload len: %u\n", __func__, payload_len);
if (ctx->max_payload == SPU_MAX_PAYLOAD_INF)
return 0;
else
return payload_len > ctx->max_payload;
}
static void aead_complete(struct crypto_async_request *areq, int err)
{
struct aead_request *req =
container_of(areq, struct aead_request, base);
struct iproc_reqctx_s *rctx = aead_request_ctx(req);
struct crypto_aead *aead = crypto_aead_reqtfm(req);
flow_log("%s() err:%d\n", __func__, err);
areq->tfm = crypto_aead_tfm(aead);
areq->complete = rctx->old_complete;
areq->data = rctx->old_data;
areq->complete(areq, err);
}
static int aead_do_fallback(struct aead_request *req, bool is_encrypt)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct crypto_tfm *tfm = crypto_aead_tfm(aead);
struct iproc_reqctx_s *rctx = aead_request_ctx(req);
struct iproc_ctx_s *ctx = crypto_tfm_ctx(tfm);
int err;
u32 req_flags;
flow_log("%s() enc:%u\n", __func__, is_encrypt);
if (ctx->fallback_cipher) {
/* Store the cipher tfm and then use the fallback tfm */
rctx->old_tfm = tfm;
aead_request_set_tfm(req, ctx->fallback_cipher);
/*
* Save the callback and chain ourselves in, so we can restore
* the tfm
*/
rctx->old_complete = req->base.complete;
rctx->old_data = req->base.data;
req_flags = aead_request_flags(req);
aead_request_set_callback(req, req_flags, aead_complete, req);
err = is_encrypt ? crypto_aead_encrypt(req) :
crypto_aead_decrypt(req);
if (err == 0) {
/*
* fallback was synchronous (did not return
* -EINPROGRESS). So restore request state here.
*/
aead_request_set_callback(req, req_flags,
rctx->old_complete, req);
req->base.data = rctx->old_data;
aead_request_set_tfm(req, aead);
flow_log("%s() fallback completed successfully\n\n",
__func__);
}
} else {
err = -EINVAL;
}
return err;
}
static int aead_enqueue(struct aead_request *req, bool is_encrypt)
{
struct iproc_reqctx_s *rctx = aead_request_ctx(req);
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct iproc_ctx_s *ctx = crypto_aead_ctx(aead);
int err;
flow_log("%s() enc:%u\n", __func__, is_encrypt);
if (req->assoclen > MAX_ASSOC_SIZE) {
pr_err
("%s() Error: associated data too long. (%u > %u bytes)\n",
__func__, req->assoclen, MAX_ASSOC_SIZE);
return -EINVAL;
}
rctx->gfp = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
rctx->parent = &req->base;
rctx->is_encrypt = is_encrypt;
rctx->bd_suppress = false;
rctx->total_todo = req->cryptlen;
rctx->src_sent = 0;
rctx->total_sent = 0;
rctx->total_received = 0;
rctx->is_sw_hmac = false;
rctx->ctx = ctx;
memset(&rctx->mb_mssg, 0, sizeof(struct brcm_message));
/* assoc data is at start of src sg */
rctx->assoc = req->src;
/*
* Init current position in src scatterlist to be after assoc data.
* src_skip set to buffer offset where data begins. (Assoc data could
* end in the middle of a buffer.)
*/
if (spu_sg_at_offset(req->src, req->assoclen, &rctx->src_sg,
&rctx->src_skip) < 0) {
pr_err("%s() Error: Unable to find start of src data\n",
__func__);
return -EINVAL;
}
rctx->src_nents = 0;
rctx->dst_nents = 0;
if (req->dst == req->src) {
rctx->dst_sg = rctx->src_sg;
rctx->dst_skip = rctx->src_skip;
} else {
/*
* Expect req->dst to have room for assoc data followed by
* output data and ICV, if encrypt. So initialize dst_sg
* to point beyond assoc len offset.
*/
if (spu_sg_at_offset(req->dst, req->assoclen, &rctx->dst_sg,
&rctx->dst_skip) < 0) {
pr_err("%s() Error: Unable to find start of dst data\n",
__func__);
return -EINVAL;
}
}
if (ctx->cipher.mode == CIPHER_MODE_CBC ||
ctx->cipher.mode == CIPHER_MODE_CTR ||
ctx->cipher.mode == CIPHER_MODE_OFB ||
ctx->cipher.mode == CIPHER_MODE_XTS ||
ctx->cipher.mode == CIPHER_MODE_GCM) {
rctx->iv_ctr_len =
ctx->salt_len +
crypto_aead_ivsize(crypto_aead_reqtfm(req));
} else if (ctx->cipher.mode == CIPHER_MODE_CCM) {
rctx->iv_ctr_len = CCM_AES_IV_SIZE;
} else {
rctx->iv_ctr_len = 0;
}
rctx->hash_carry_len = 0;
flow_log(" src sg: %p\n", req->src);
flow_log(" rctx->src_sg: %p, src_skip %u\n",
rctx->src_sg, rctx->src_skip);
flow_log(" assoc: %p, assoclen %u\n", rctx->assoc, req->assoclen);
flow_log(" dst sg: %p\n", req->dst);
flow_log(" rctx->dst_sg: %p, dst_skip %u\n",
rctx->dst_sg, rctx->dst_skip);
flow_log(" iv_ctr_len:%u\n", rctx->iv_ctr_len);
flow_dump(" iv: ", req->iv, rctx->iv_ctr_len);
flow_log(" authkeylen:%u\n", ctx->authkeylen);
flow_log(" is_esp: %s\n", ctx->is_esp ? "yes" : "no");
if (ctx->max_payload == SPU_MAX_PAYLOAD_INF)
flow_log(" max_payload infinite");
else
flow_log(" max_payload: %u\n", ctx->max_payload);
if (unlikely(aead_need_fallback(req)))
return aead_do_fallback(req, is_encrypt);
/*
* Do memory allocations for request after fallback check, because if we
* do fallback, we won't call finish_req() to dealloc.
*/
if (rctx->iv_ctr_len) {
if (ctx->salt_len)
memcpy(rctx->msg_buf.iv_ctr + ctx->salt_offset,
ctx->salt, ctx->salt_len);
memcpy(rctx->msg_buf.iv_ctr + ctx->salt_offset + ctx->salt_len,
req->iv,
rctx->iv_ctr_len - ctx->salt_len - ctx->salt_offset);
}
rctx->chan_idx = select_channel();
err = handle_aead_req(rctx);
if (err != -EINPROGRESS)
/* synchronous result */
spu_chunk_cleanup(rctx);
return err;
}
static int aead_authenc_setkey(struct crypto_aead *cipher,
const u8 *key, unsigned int keylen)
{
struct spu_hw *spu = &iproc_priv.spu;
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
struct crypto_authenc_keys keys;
int ret;
flow_log("%s() aead:%p key:%p keylen:%u\n", __func__, cipher, key,
keylen);
flow_dump(" key: ", key, keylen);
ret = crypto_authenc_extractkeys(&keys, key, keylen);
if (ret)
goto badkey;
if (keys.enckeylen > MAX_KEY_SIZE ||
keys.authkeylen > MAX_KEY_SIZE)
goto badkey;
ctx->enckeylen = keys.enckeylen;
ctx->authkeylen = keys.authkeylen;
memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
/* May end up padding auth key. So make sure it's zeroed. */
memset(ctx->authkey, 0, sizeof(ctx->authkey));
memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
switch (ctx->alg->cipher_info.alg) {
case CIPHER_ALG_DES:
if (verify_aead_des_key(cipher, keys.enckey, keys.enckeylen))
return -EINVAL;
ctx->cipher_type = CIPHER_TYPE_DES;
break;
case CIPHER_ALG_3DES:
if (verify_aead_des3_key(cipher, keys.enckey, keys.enckeylen))
return -EINVAL;
ctx->cipher_type = CIPHER_TYPE_3DES;
break;
case CIPHER_ALG_AES:
switch (ctx->enckeylen) {
case AES_KEYSIZE_128:
ctx->cipher_type = CIPHER_TYPE_AES128;
break;
case AES_KEYSIZE_192:
ctx->cipher_type = CIPHER_TYPE_AES192;
break;
case AES_KEYSIZE_256:
ctx->cipher_type = CIPHER_TYPE_AES256;
break;
default:
goto badkey;
}
break;
case CIPHER_ALG_RC4:
ctx->cipher_type = CIPHER_TYPE_INIT;
break;
default:
pr_err("%s() Error: Unknown cipher alg\n", __func__);
return -EINVAL;
}
flow_log(" enckeylen:%u authkeylen:%u\n", ctx->enckeylen,
ctx->authkeylen);
flow_dump(" enc: ", ctx->enckey, ctx->enckeylen);
flow_dump(" auth: ", ctx->authkey, ctx->authkeylen);
/* setkey the fallback just in case we needto use it */
if (ctx->fallback_cipher) {
flow_log(" running fallback setkey()\n");
ctx->fallback_cipher->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
ctx->fallback_cipher->base.crt_flags |=
tfm->crt_flags & CRYPTO_TFM_REQ_MASK;
ret = crypto_aead_setkey(ctx->fallback_cipher, key, keylen);
if (ret) {
flow_log(" fallback setkey() returned:%d\n", ret);
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |=
(ctx->fallback_cipher->base.crt_flags &
CRYPTO_TFM_RES_MASK);
}
}
ctx->spu_resp_hdr_len = spu->spu_response_hdr_len(ctx->authkeylen,
ctx->enckeylen,
false);
atomic_inc(&iproc_priv.setkey_cnt[SPU_OP_AEAD]);
return ret;
badkey:
ctx->enckeylen = 0;
ctx->authkeylen = 0;
ctx->digestsize = 0;
crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
static int aead_gcm_ccm_setkey(struct crypto_aead *cipher,
const u8 *key, unsigned int keylen)
{
struct spu_hw *spu = &iproc_priv.spu;
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
int ret = 0;
flow_log("%s() keylen:%u\n", __func__, keylen);
flow_dump(" key: ", key, keylen);
if (!ctx->is_esp)
ctx->digestsize = keylen;
ctx->enckeylen = keylen;
ctx->authkeylen = 0;
memcpy(ctx->enckey, key, ctx->enckeylen);
switch (ctx->enckeylen) {
case AES_KEYSIZE_128:
ctx->cipher_type = CIPHER_TYPE_AES128;
break;
case AES_KEYSIZE_192:
ctx->cipher_type = CIPHER_TYPE_AES192;
break;
case AES_KEYSIZE_256:
ctx->cipher_type = CIPHER_TYPE_AES256;
break;
default:
goto badkey;
}
flow_log(" enckeylen:%u authkeylen:%u\n", ctx->enckeylen,
ctx->authkeylen);
flow_dump(" enc: ", ctx->enckey, ctx->enckeylen);
flow_dump(" auth: ", ctx->authkey, ctx->authkeylen);
/* setkey the fallback just in case we need to use it */
if (ctx->fallback_cipher) {
flow_log(" running fallback setkey()\n");
ctx->fallback_cipher->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
ctx->fallback_cipher->base.crt_flags |=
tfm->crt_flags & CRYPTO_TFM_REQ_MASK;
ret = crypto_aead_setkey(ctx->fallback_cipher, key,
keylen + ctx->salt_len);
if (ret) {
flow_log(" fallback setkey() returned:%d\n", ret);
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |=
(ctx->fallback_cipher->base.crt_flags &
CRYPTO_TFM_RES_MASK);
}
}
ctx->spu_resp_hdr_len = spu->spu_response_hdr_len(ctx->authkeylen,
ctx->enckeylen,
false);
atomic_inc(&iproc_priv.setkey_cnt[SPU_OP_AEAD]);
flow_log(" enckeylen:%u authkeylen:%u\n", ctx->enckeylen,
ctx->authkeylen);
return ret;
badkey:
ctx->enckeylen = 0;
ctx->authkeylen = 0;
ctx->digestsize = 0;
crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
/**
* aead_gcm_esp_setkey() - setkey() operation for ESP variant of GCM AES.
* @cipher: AEAD structure
* @key: Key followed by 4 bytes of salt
* @keylen: Length of key plus salt, in bytes
*
* Extracts salt from key and stores it to be prepended to IV on each request.
* Digest is always 16 bytes
*
* Return: Value from generic gcm setkey.
*/
static int aead_gcm_esp_setkey(struct crypto_aead *cipher,
const u8 *key, unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__);
ctx->salt_len = GCM_ESP_SALT_SIZE;
ctx->salt_offset = GCM_ESP_SALT_OFFSET;
memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE);
keylen -= GCM_ESP_SALT_SIZE;
ctx->digestsize = GCM_ESP_DIGESTSIZE;
ctx->is_esp = true;
flow_dump("salt: ", ctx->salt, GCM_ESP_SALT_SIZE);
return aead_gcm_ccm_setkey(cipher, key, keylen);
}
/**
* rfc4543_gcm_esp_setkey() - setkey operation for RFC4543 variant of GCM/GMAC.
* cipher: AEAD structure
* key: Key followed by 4 bytes of salt
* keylen: Length of key plus salt, in bytes
*
* Extracts salt from key and stores it to be prepended to IV on each request.
* Digest is always 16 bytes
*
* Return: Value from generic gcm setkey.
*/
static int rfc4543_gcm_esp_setkey(struct crypto_aead *cipher,
const u8 *key, unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__);
ctx->salt_len = GCM_ESP_SALT_SIZE;
ctx->salt_offset = GCM_ESP_SALT_OFFSET;
memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE);
keylen -= GCM_ESP_SALT_SIZE;
ctx->digestsize = GCM_ESP_DIGESTSIZE;
ctx->is_esp = true;
ctx->is_rfc4543 = true;
flow_dump("salt: ", ctx->salt, GCM_ESP_SALT_SIZE);
return aead_gcm_ccm_setkey(cipher, key, keylen);
}
/**
* aead_ccm_esp_setkey() - setkey() operation for ESP variant of CCM AES.
* @cipher: AEAD structure
* @key: Key followed by 4 bytes of salt
* @keylen: Length of key plus salt, in bytes
*
* Extracts salt from key and stores it to be prepended to IV on each request.
* Digest is always 16 bytes
*
* Return: Value from generic ccm setkey.
*/
static int aead_ccm_esp_setkey(struct crypto_aead *cipher,
const u8 *key, unsigned int keylen)
{
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__);
ctx->salt_len = CCM_ESP_SALT_SIZE;
ctx->salt_offset = CCM_ESP_SALT_OFFSET;
memcpy(ctx->salt, key + keylen - CCM_ESP_SALT_SIZE, CCM_ESP_SALT_SIZE);
keylen -= CCM_ESP_SALT_SIZE;
ctx->is_esp = true;
flow_dump("salt: ", ctx->salt, CCM_ESP_SALT_SIZE);
return aead_gcm_ccm_setkey(cipher, key, keylen);
}
static int aead_setauthsize(struct crypto_aead *cipher, unsigned int authsize)
{
struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
int ret = 0;
flow_log("%s() authkeylen:%u authsize:%u\n",
__func__, ctx->authkeylen, authsize);
ctx->digestsize = authsize;
/* setkey the fallback just in case we needto use it */
if (ctx->fallback_cipher) {
flow_log(" running fallback setauth()\n");
ret = crypto_aead_setauthsize(ctx->fallback_cipher, authsize);
if (ret)
flow_log(" fallback setauth() returned:%d\n", ret);
}
return ret;
}
static int aead_encrypt(struct aead_request *req)
{
flow_log("%s() cryptlen:%u %08x\n", __func__, req->cryptlen,
req->cryptlen);
dump_sg(req->src, 0, req->cryptlen + req->assoclen);
flow_log(" assoc_len:%u\n", req->assoclen);
return aead_enqueue(req, true);
}
static int aead_decrypt(struct aead_request *req)
{
flow_log("%s() cryptlen:%u\n", __func__, req->cryptlen);
dump_sg(req->src, 0, req->cryptlen + req->assoclen);
flow_log(" assoc_len:%u\n", req->assoclen);
return aead_enqueue(req, false);
}
/* ==================== Supported Cipher Algorithms ==================== */
static struct iproc_alg_s driver_algs[] = {
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "gcm(aes)",
.cra_driver_name = "gcm-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK
},
.setkey = aead_gcm_ccm_setkey,
.ivsize = GCM_AES_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_GCM,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_GCM,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "ccm(aes)",
.cra_driver_name = "ccm-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK
},
.setkey = aead_gcm_ccm_setkey,
.ivsize = CCM_AES_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CCM,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_CCM,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "rfc4106(gcm(aes))",
.cra_driver_name = "gcm-aes-esp-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK
},
.setkey = aead_gcm_esp_setkey,
.ivsize = GCM_RFC4106_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_GCM,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_GCM,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "rfc4309(ccm(aes))",
.cra_driver_name = "ccm-aes-esp-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK
},
.setkey = aead_ccm_esp_setkey,
.ivsize = CCM_AES_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CCM,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_CCM,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "rfc4543(gcm(aes))",
.cra_driver_name = "gmac-aes-esp-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK
},
.setkey = rfc4543_gcm_esp_setkey,
.ivsize = GCM_RFC4106_IV_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_GCM,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_GCM,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(md5),cbc(aes))",
.cra_driver_name = "authenc-hmac-md5-cbc-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = MD5_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_MD5,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha1),cbc(aes))",
.cra_driver_name = "authenc-hmac-sha1-cbc-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = SHA1_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA1,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha256),cbc(aes))",
.cra_driver_name = "authenc-hmac-sha256-cbc-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA256,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(md5),cbc(des))",
.cra_driver_name = "authenc-hmac-md5-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = MD5_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_MD5,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha1),cbc(des))",
.cra_driver_name = "authenc-hmac-sha1-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA1_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA1,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha224),cbc(des))",
.cra_driver_name = "authenc-hmac-sha224-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA224_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA224,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha256),cbc(des))",
.cra_driver_name = "authenc-hmac-sha256-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA256,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha384),cbc(des))",
.cra_driver_name = "authenc-hmac-sha384-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA384_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA384,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha512),cbc(des))",
.cra_driver_name = "authenc-hmac-sha512-cbc-des-iproc",
.cra_blocksize = DES_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA512_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA512,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(md5),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-md5-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = MD5_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_MD5,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-sha1-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA1_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA1,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha224),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-sha224-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA224_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA224,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-sha256-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA256,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha384),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-sha384-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA384_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA384,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
{
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
.cra_name = "authenc(hmac(sha512),cbc(des3_ede))",
.cra_driver_name = "authenc-hmac-sha512-cbc-des3-iproc",
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.cra_flags = CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC
},
.setkey = aead_authenc_setkey,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA512_DIGEST_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_SHA512,
.mode = HASH_MODE_HMAC,
},
.auth_first = 0,
},
/* SKCIPHER algorithms. */
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(arc4)",
.base.cra_driver_name = "ecb-arc4-iproc",
.base.cra_blocksize = ARC4_BLOCK_SIZE,
.min_keysize = ARC4_MIN_KEY_SIZE,
.max_keysize = ARC4_MAX_KEY_SIZE,
.ivsize = 0,
},
.cipher_info = {
.alg = CIPHER_ALG_RC4,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ofb(des)",
.base.cra_driver_name = "ofb-des-iproc",
.base.cra_blocksize = DES_BLOCK_SIZE,
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_OFB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "cbc(des)",
.base.cra_driver_name = "cbc-des-iproc",
.base.cra_blocksize = DES_BLOCK_SIZE,
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(des)",
.base.cra_driver_name = "ecb-des-iproc",
.base.cra_blocksize = DES_BLOCK_SIZE,
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = 0,
},
.cipher_info = {
.alg = CIPHER_ALG_DES,
.mode = CIPHER_MODE_ECB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ofb(des3_ede)",
.base.cra_driver_name = "ofb-des3-iproc",
.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_OFB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "cbc(des3_ede)",
.base.cra_driver_name = "cbc-des3-iproc",
.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(des3_ede)",
.base.cra_driver_name = "ecb-des3-iproc",
.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = 0,
},
.cipher_info = {
.alg = CIPHER_ALG_3DES,
.mode = CIPHER_MODE_ECB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ofb(aes)",
.base.cra_driver_name = "ofb-aes-iproc",
.base.cra_blocksize = AES_BLOCK_SIZE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_OFB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "cbc(aes)",
.base.cra_driver_name = "cbc-aes-iproc",
.base.cra_blocksize = AES_BLOCK_SIZE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CBC,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(aes)",
.base.cra_driver_name = "ecb-aes-iproc",
.base.cra_blocksize = AES_BLOCK_SIZE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = 0,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_ECB,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ctr(aes)",
.base.cra_driver_name = "ctr-aes-iproc",
.base.cra_blocksize = AES_BLOCK_SIZE,
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_CTR,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
{
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "xts(aes)",
.base.cra_driver_name = "xts-aes-iproc",
.base.cra_blocksize = AES_BLOCK_SIZE,
.min_keysize = 2 * AES_MIN_KEY_SIZE,
.max_keysize = 2 * AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
},
.cipher_info = {
.alg = CIPHER_ALG_AES,
.mode = CIPHER_MODE_XTS,
},
.auth_info = {
.alg = HASH_ALG_NONE,
.mode = HASH_MODE_NONE,
},
},
/* AHASH algorithms. */
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = MD5_DIGEST_SIZE,
.halg.base = {
.cra_name = "md5",
.cra_driver_name = "md5-iproc",
.cra_blocksize = MD5_BLOCK_WORDS * 4,
.cra_flags = CRYPTO_ALG_ASYNC,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_MD5,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = MD5_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(md5)",
.cra_driver_name = "hmac-md5-iproc",
.cra_blocksize = MD5_BLOCK_WORDS * 4,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_MD5,
.mode = HASH_MODE_HMAC,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA1_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-iproc",
.cra_blocksize = SHA1_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA1,
.mode = HASH_MODE_HASH,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA1_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha1)",
.cra_driver_name = "hmac-sha1-iproc",
.cra_blocksize = SHA1_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA1,
.mode = HASH_MODE_HMAC,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA224_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha224",
.cra_driver_name = "sha224-iproc",
.cra_blocksize = SHA224_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA224,
.mode = HASH_MODE_HASH,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA224_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha224)",
.cra_driver_name = "hmac-sha224-iproc",
.cra_blocksize = SHA224_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA224,
.mode = HASH_MODE_HMAC,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA256_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha256",
.cra_driver_name = "sha256-iproc",
.cra_blocksize = SHA256_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA256,
.mode = HASH_MODE_HASH,
},
},
{.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA256_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha256)",
.cra_driver_name = "hmac-sha256-iproc",
.cra_blocksize = SHA256_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA256,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA384_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha384",
.cra_driver_name = "sha384-iproc",
.cra_blocksize = SHA384_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA384,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA384_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha384)",
.cra_driver_name = "hmac-sha384-iproc",
.cra_blocksize = SHA384_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA384,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA512_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha512",
.cra_driver_name = "sha512-iproc",
.cra_blocksize = SHA512_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA512,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA512_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha512)",
.cra_driver_name = "hmac-sha512-iproc",
.cra_blocksize = SHA512_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA512,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_224_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha3-224",
.cra_driver_name = "sha3-224-iproc",
.cra_blocksize = SHA3_224_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_224,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_224_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha3-224)",
.cra_driver_name = "hmac-sha3-224-iproc",
.cra_blocksize = SHA3_224_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_224,
.mode = HASH_MODE_HMAC
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_256_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha3-256",
.cra_driver_name = "sha3-256-iproc",
.cra_blocksize = SHA3_256_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_256,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_256_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha3-256)",
.cra_driver_name = "hmac-sha3-256-iproc",
.cra_blocksize = SHA3_256_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_256,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_384_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha3-384",
.cra_driver_name = "sha3-384-iproc",
.cra_blocksize = SHA3_224_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_384,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_384_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha3-384)",
.cra_driver_name = "hmac-sha3-384-iproc",
.cra_blocksize = SHA3_384_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_384,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_512_DIGEST_SIZE,
.halg.base = {
.cra_name = "sha3-512",
.cra_driver_name = "sha3-512-iproc",
.cra_blocksize = SHA3_512_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_512,
.mode = HASH_MODE_HASH,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = SHA3_512_DIGEST_SIZE,
.halg.base = {
.cra_name = "hmac(sha3-512)",
.cra_driver_name = "hmac-sha3-512-iproc",
.cra_blocksize = SHA3_512_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_SHA3_512,
.mode = HASH_MODE_HMAC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = AES_BLOCK_SIZE,
.halg.base = {
.cra_name = "xcbc(aes)",
.cra_driver_name = "xcbc-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_XCBC,
},
},
{
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.hash = {
.halg.digestsize = AES_BLOCK_SIZE,
.halg.base = {
.cra_name = "cmac(aes)",
.cra_driver_name = "cmac-aes-iproc",
.cra_blocksize = AES_BLOCK_SIZE,
}
},
.cipher_info = {
.alg = CIPHER_ALG_NONE,
.mode = CIPHER_MODE_NONE,
},
.auth_info = {
.alg = HASH_ALG_AES,
.mode = HASH_MODE_CMAC,
},
},
};
static int generic_cra_init(struct crypto_tfm *tfm,
struct iproc_alg_s *cipher_alg)
{
struct spu_hw *spu = &iproc_priv.spu;
struct iproc_ctx_s *ctx = crypto_tfm_ctx(tfm);
unsigned int blocksize = crypto_tfm_alg_blocksize(tfm);
flow_log("%s()\n", __func__);
ctx->alg = cipher_alg;
ctx->cipher = cipher_alg->cipher_info;
ctx->auth = cipher_alg->auth_info;
ctx->auth_first = cipher_alg->auth_first;
ctx->max_payload = spu->spu_ctx_max_payload(ctx->cipher.alg,
ctx->cipher.mode,
blocksize);
ctx->fallback_cipher = NULL;
ctx->enckeylen = 0;
ctx->authkeylen = 0;
atomic_inc(&iproc_priv.stream_count);
atomic_inc(&iproc_priv.session_count);
return 0;
}
static int skcipher_init_tfm(struct crypto_skcipher *skcipher)
{
struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
struct iproc_alg_s *cipher_alg;
flow_log("%s()\n", __func__);
crypto_skcipher_set_reqsize(skcipher, sizeof(struct iproc_reqctx_s));
cipher_alg = container_of(alg, struct iproc_alg_s, alg.skcipher);
return generic_cra_init(tfm, cipher_alg);
}
static int ahash_cra_init(struct crypto_tfm *tfm)
{
int err;
struct crypto_alg *alg = tfm->__crt_alg;
struct iproc_alg_s *cipher_alg;
cipher_alg = container_of(__crypto_ahash_alg(alg), struct iproc_alg_s,
alg.hash);
err = generic_cra_init(tfm, cipher_alg);
flow_log("%s()\n", __func__);
/*
* export state size has to be < 512 bytes. So don't include msg bufs
* in state size.
*/
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct iproc_reqctx_s));
return err;
}
static int aead_cra_init(struct crypto_aead *aead)
{
struct crypto_tfm *tfm = crypto_aead_tfm(aead);
struct iproc_ctx_s *ctx = crypto_tfm_ctx(tfm);
struct crypto_alg *alg = tfm->__crt_alg;
struct aead_alg *aalg = container_of(alg, struct aead_alg, base);
struct iproc_alg_s *cipher_alg = container_of(aalg, struct iproc_alg_s,
alg.aead);
int err = generic_cra_init(tfm, cipher_alg);
flow_log("%s()\n", __func__);
crypto_aead_set_reqsize(aead, sizeof(struct iproc_reqctx_s));
ctx->is_esp = false;
ctx->salt_len = 0;
ctx->salt_offset = 0;
/* random first IV */
get_random_bytes(ctx->iv, MAX_IV_SIZE);
flow_dump(" iv: ", ctx->iv, MAX_IV_SIZE);
if (!err) {
if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
flow_log("%s() creating fallback cipher\n", __func__);
ctx->fallback_cipher =
crypto_alloc_aead(alg->cra_name, 0,
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback_cipher)) {
pr_err("%s() Error: failed to allocate fallback for %s\n",
__func__, alg->cra_name);
return PTR_ERR(ctx->fallback_cipher);
}
}
}
return err;
}
static void generic_cra_exit(struct crypto_tfm *tfm)
{
atomic_dec(&iproc_priv.session_count);
}
static void skcipher_exit_tfm(struct crypto_skcipher *tfm)
{
generic_cra_exit(crypto_skcipher_tfm(tfm));
}
static void aead_cra_exit(struct crypto_aead *aead)
{
struct crypto_tfm *tfm = crypto_aead_tfm(aead);
struct iproc_ctx_s *ctx = crypto_tfm_ctx(tfm);
generic_cra_exit(tfm);
if (ctx->fallback_cipher) {
crypto_free_aead(ctx->fallback_cipher);
ctx->fallback_cipher = NULL;
}
}
/**
* spu_functions_register() - Specify hardware-specific SPU functions based on
* SPU type read from device tree.
* @dev: device structure
* @spu_type: SPU hardware generation
* @spu_subtype: SPU hardware version
*/
static void spu_functions_register(struct device *dev,
enum spu_spu_type spu_type,
enum spu_spu_subtype spu_subtype)
{
struct spu_hw *spu = &iproc_priv.spu;
if (spu_type == SPU_TYPE_SPUM) {
dev_dbg(dev, "Registering SPUM functions");
spu->spu_dump_msg_hdr = spum_dump_msg_hdr;
spu->spu_payload_length = spum_payload_length;
spu->spu_response_hdr_len = spum_response_hdr_len;
spu->spu_hash_pad_len = spum_hash_pad_len;
spu->spu_gcm_ccm_pad_len = spum_gcm_ccm_pad_len;
spu->spu_assoc_resp_len = spum_assoc_resp_len;
spu->spu_aead_ivlen = spum_aead_ivlen;
spu->spu_hash_type = spum_hash_type;
spu->spu_digest_size = spum_digest_size;
spu->spu_create_request = spum_create_request;
spu->spu_cipher_req_init = spum_cipher_req_init;
spu->spu_cipher_req_finish = spum_cipher_req_finish;
spu->spu_request_pad = spum_request_pad;
spu->spu_tx_status_len = spum_tx_status_len;
spu->spu_rx_status_len = spum_rx_status_len;
spu->spu_status_process = spum_status_process;
spu->spu_xts_tweak_in_payload = spum_xts_tweak_in_payload;
spu->spu_ccm_update_iv = spum_ccm_update_iv;
spu->spu_wordalign_padlen = spum_wordalign_padlen;
if (spu_subtype == SPU_SUBTYPE_SPUM_NS2)
spu->spu_ctx_max_payload = spum_ns2_ctx_max_payload;
else
spu->spu_ctx_max_payload = spum_nsp_ctx_max_payload;
} else {
dev_dbg(dev, "Registering SPU2 functions");
spu->spu_dump_msg_hdr = spu2_dump_msg_hdr;
spu->spu_ctx_max_payload = spu2_ctx_max_payload;
spu->spu_payload_length = spu2_payload_length;
spu->spu_response_hdr_len = spu2_response_hdr_len;
spu->spu_hash_pad_len = spu2_hash_pad_len;
spu->spu_gcm_ccm_pad_len = spu2_gcm_ccm_pad_len;
spu->spu_assoc_resp_len = spu2_assoc_resp_len;
spu->spu_aead_ivlen = spu2_aead_ivlen;
spu->spu_hash_type = spu2_hash_type;
spu->spu_digest_size = spu2_digest_size;
spu->spu_create_request = spu2_create_request;
spu->spu_cipher_req_init = spu2_cipher_req_init;
spu->spu_cipher_req_finish = spu2_cipher_req_finish;
spu->spu_request_pad = spu2_request_pad;
spu->spu_tx_status_len = spu2_tx_status_len;
spu->spu_rx_status_len = spu2_rx_status_len;
spu->spu_status_process = spu2_status_process;
spu->spu_xts_tweak_in_payload = spu2_xts_tweak_in_payload;
spu->spu_ccm_update_iv = spu2_ccm_update_iv;
spu->spu_wordalign_padlen = spu2_wordalign_padlen;
}
}
/**
* spu_mb_init() - Initialize mailbox client. Request ownership of a mailbox
* channel for the SPU being probed.
* @dev: SPU driver device structure
*
* Return: 0 if successful
* < 0 otherwise
*/
static int spu_mb_init(struct device *dev)
{
struct mbox_client *mcl = &iproc_priv.mcl;
int err, i;
iproc_priv.mbox = devm_kcalloc(dev, iproc_priv.spu.num_chan,
sizeof(struct mbox_chan *), GFP_KERNEL);
if (!iproc_priv.mbox)
return -ENOMEM;
mcl->dev = dev;
mcl->tx_block = false;
mcl->tx_tout = 0;
mcl->knows_txdone = true;
mcl->rx_callback = spu_rx_callback;
mcl->tx_done = NULL;
for (i = 0; i < iproc_priv.spu.num_chan; i++) {
iproc_priv.mbox[i] = mbox_request_channel(mcl, i);
if (IS_ERR(iproc_priv.mbox[i])) {
err = (int)PTR_ERR(iproc_priv.mbox[i]);
dev_err(dev,
"Mbox channel %d request failed with err %d",
i, err);
iproc_priv.mbox[i] = NULL;
goto free_channels;
}
}
return 0;
free_channels:
for (i = 0; i < iproc_priv.spu.num_chan; i++) {
if (iproc_priv.mbox[i])
mbox_free_channel(iproc_priv.mbox[i]);
}
return err;
}
static void spu_mb_release(struct platform_device *pdev)
{
int i;
for (i = 0; i < iproc_priv.spu.num_chan; i++)
mbox_free_channel(iproc_priv.mbox[i]);
}
static void spu_counters_init(void)
{
int i;
int j;
atomic_set(&iproc_priv.session_count, 0);
atomic_set(&iproc_priv.stream_count, 0);
atomic_set(&iproc_priv.next_chan, (int)iproc_priv.spu.num_chan);
atomic64_set(&iproc_priv.bytes_in, 0);
atomic64_set(&iproc_priv.bytes_out, 0);
for (i = 0; i < SPU_OP_NUM; i++) {
atomic_set(&iproc_priv.op_counts[i], 0);
atomic_set(&iproc_priv.setkey_cnt[i], 0);
}
for (i = 0; i < CIPHER_ALG_LAST; i++)
for (j = 0; j < CIPHER_MODE_LAST; j++)
atomic_set(&iproc_priv.cipher_cnt[i][j], 0);
for (i = 0; i < HASH_ALG_LAST; i++) {
atomic_set(&iproc_priv.hash_cnt[i], 0);
atomic_set(&iproc_priv.hmac_cnt[i], 0);
}
for (i = 0; i < AEAD_TYPE_LAST; i++)
atomic_set(&iproc_priv.aead_cnt[i], 0);
atomic_set(&iproc_priv.mb_no_spc, 0);
atomic_set(&iproc_priv.mb_send_fail, 0);
atomic_set(&iproc_priv.bad_icv, 0);
}
static int spu_register_skcipher(struct iproc_alg_s *driver_alg)
{
struct spu_hw *spu = &iproc_priv.spu;
struct skcipher_alg *crypto = &driver_alg->alg.skcipher;
int err;
/* SPU2 does not support RC4 */
if ((driver_alg->cipher_info.alg == CIPHER_ALG_RC4) &&
(spu->spu_type == SPU_TYPE_SPU2))
return 0;
crypto->base.cra_module = THIS_MODULE;
crypto->base.cra_priority = cipher_pri;
crypto->base.cra_alignmask = 0;
crypto->base.cra_ctxsize = sizeof(struct iproc_ctx_s);
crypto->base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY;
crypto->init = skcipher_init_tfm;
crypto->exit = skcipher_exit_tfm;
crypto->setkey = skcipher_setkey;
crypto->encrypt = skcipher_encrypt;
crypto->decrypt = skcipher_decrypt;
err = crypto_register_skcipher(crypto);
/* Mark alg as having been registered, if successful */
if (err == 0)
driver_alg->registered = true;
pr_debug(" registered skcipher %s\n", crypto->base.cra_driver_name);
return err;
}
static int spu_register_ahash(struct iproc_alg_s *driver_alg)
{
struct spu_hw *spu = &iproc_priv.spu;
struct ahash_alg *hash = &driver_alg->alg.hash;
int err;
/* AES-XCBC is the only AES hash type currently supported on SPU-M */
if ((driver_alg->auth_info.alg == HASH_ALG_AES) &&
(driver_alg->auth_info.mode != HASH_MODE_XCBC) &&
(spu->spu_type == SPU_TYPE_SPUM))
return 0;
/* SHA3 algorithm variants are not registered for SPU-M or SPU2. */
if ((driver_alg->auth_info.alg >= HASH_ALG_SHA3_224) &&
(spu->spu_subtype != SPU_SUBTYPE_SPU2_V2))
return 0;
hash->halg.base.cra_module = THIS_MODULE;
hash->halg.base.cra_priority = hash_pri;
hash->halg.base.cra_alignmask = 0;
hash->halg.base.cra_ctxsize = sizeof(struct iproc_ctx_s);
hash->halg.base.cra_init = ahash_cra_init;
hash->halg.base.cra_exit = generic_cra_exit;
hash->halg.base.cra_flags = CRYPTO_ALG_ASYNC;
hash->halg.statesize = sizeof(struct spu_hash_export_s);
if (driver_alg->auth_info.mode != HASH_MODE_HMAC) {
hash->init = ahash_init;
hash->update = ahash_update;
hash->final = ahash_final;
hash->finup = ahash_finup;
hash->digest = ahash_digest;
if ((driver_alg->auth_info.alg == HASH_ALG_AES) &&
((driver_alg->auth_info.mode == HASH_MODE_XCBC) ||
(driver_alg->auth_info.mode == HASH_MODE_CMAC))) {
hash->setkey = ahash_setkey;
}
} else {
hash->setkey = ahash_hmac_setkey;
hash->init = ahash_hmac_init;
hash->update = ahash_hmac_update;
hash->final = ahash_hmac_final;
hash->finup = ahash_hmac_finup;
hash->digest = ahash_hmac_digest;
}
hash->export = ahash_export;
hash->import = ahash_import;
err = crypto_register_ahash(hash);
/* Mark alg as having been registered, if successful */
if (err == 0)
driver_alg->registered = true;
pr_debug(" registered ahash %s\n",
hash->halg.base.cra_driver_name);
return err;
}
static int spu_register_aead(struct iproc_alg_s *driver_alg)
{
struct aead_alg *aead = &driver_alg->alg.aead;
int err;
aead->base.cra_module = THIS_MODULE;
aead->base.cra_priority = aead_pri;
aead->base.cra_alignmask = 0;
aead->base.cra_ctxsize = sizeof(struct iproc_ctx_s);
aead->base.cra_flags |= CRYPTO_ALG_ASYNC;
/* setkey set in alg initialization */
aead->setauthsize = aead_setauthsize;
aead->encrypt = aead_encrypt;
aead->decrypt = aead_decrypt;
aead->init = aead_cra_init;
aead->exit = aead_cra_exit;
err = crypto_register_aead(aead);
/* Mark alg as having been registered, if successful */
if (err == 0)
driver_alg->registered = true;
pr_debug(" registered aead %s\n", aead->base.cra_driver_name);
return err;
}
/* register crypto algorithms the device supports */
static int spu_algs_register(struct device *dev)
{
int i, j;
int err;
for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
switch (driver_algs[i].type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
err = spu_register_skcipher(&driver_algs[i]);
break;
case CRYPTO_ALG_TYPE_AHASH:
err = spu_register_ahash(&driver_algs[i]);
break;
case CRYPTO_ALG_TYPE_AEAD:
err = spu_register_aead(&driver_algs[i]);
break;
default:
dev_err(dev,
"iproc-crypto: unknown alg type: %d",
driver_algs[i].type);
err = -EINVAL;
}
if (err) {
dev_err(dev, "alg registration failed with error %d\n",
err);
goto err_algs;
}
}
return 0;
err_algs:
for (j = 0; j < i; j++) {
/* Skip any algorithm not registered */
if (!driver_algs[j].registered)
continue;
switch (driver_algs[j].type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
crypto_unregister_skcipher(&driver_algs[j].alg.skcipher);
driver_algs[j].registered = false;
break;
case CRYPTO_ALG_TYPE_AHASH:
crypto_unregister_ahash(&driver_algs[j].alg.hash);
driver_algs[j].registered = false;
break;
case CRYPTO_ALG_TYPE_AEAD:
crypto_unregister_aead(&driver_algs[j].alg.aead);
driver_algs[j].registered = false;
break;
}
}
return err;
}
/* ==================== Kernel Platform API ==================== */
static struct spu_type_subtype spum_ns2_types = {
SPU_TYPE_SPUM, SPU_SUBTYPE_SPUM_NS2
};
static struct spu_type_subtype spum_nsp_types = {
SPU_TYPE_SPUM, SPU_SUBTYPE_SPUM_NSP
};
static struct spu_type_subtype spu2_types = {
SPU_TYPE_SPU2, SPU_SUBTYPE_SPU2_V1
};
static struct spu_type_subtype spu2_v2_types = {
SPU_TYPE_SPU2, SPU_SUBTYPE_SPU2_V2
};
static const struct of_device_id bcm_spu_dt_ids[] = {
{
.compatible = "brcm,spum-crypto",
.data = &spum_ns2_types,
},
{
.compatible = "brcm,spum-nsp-crypto",
.data = &spum_nsp_types,
},
{
.compatible = "brcm,spu2-crypto",
.data = &spu2_types,
},
{
.compatible = "brcm,spu2-v2-crypto",
.data = &spu2_v2_types,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, bcm_spu_dt_ids);
static int spu_dt_read(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct spu_hw *spu = &iproc_priv.spu;
struct resource *spu_ctrl_regs;
const struct spu_type_subtype *matched_spu_type;
struct device_node *dn = pdev->dev.of_node;
int err, i;
/* Count number of mailbox channels */
spu->num_chan = of_count_phandle_with_args(dn, "mboxes", "#mbox-cells");
matched_spu_type = of_device_get_match_data(dev);
if (!matched_spu_type) {
dev_err(&pdev->dev, "Failed to match device\n");
return -ENODEV;
}
spu->spu_type = matched_spu_type->type;
spu->spu_subtype = matched_spu_type->subtype;
i = 0;
for (i = 0; (i < MAX_SPUS) && ((spu_ctrl_regs =
platform_get_resource(pdev, IORESOURCE_MEM, i)) != NULL); i++) {
spu->reg_vbase[i] = devm_ioremap_resource(dev, spu_ctrl_regs);
if (IS_ERR(spu->reg_vbase[i])) {
err = PTR_ERR(spu->reg_vbase[i]);
dev_err(&pdev->dev, "Failed to map registers: %d\n",
err);
spu->reg_vbase[i] = NULL;
return err;
}
}
spu->num_spu = i;
dev_dbg(dev, "Device has %d SPUs", spu->num_spu);
return 0;
}
static int bcm_spu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct spu_hw *spu = &iproc_priv.spu;
int err = 0;
iproc_priv.pdev = pdev;
platform_set_drvdata(iproc_priv.pdev,
&iproc_priv);
err = spu_dt_read(pdev);
if (err < 0)
goto failure;
err = spu_mb_init(&pdev->dev);
if (err < 0)
goto failure;
if (spu->spu_type == SPU_TYPE_SPUM)
iproc_priv.bcm_hdr_len = 8;
else if (spu->spu_type == SPU_TYPE_SPU2)
iproc_priv.bcm_hdr_len = 0;
spu_functions_register(&pdev->dev, spu->spu_type, spu->spu_subtype);
spu_counters_init();
spu_setup_debugfs();
err = spu_algs_register(dev);
if (err < 0)
goto fail_reg;
return 0;
fail_reg:
spu_free_debugfs();
failure:
spu_mb_release(pdev);
dev_err(dev, "%s failed with error %d.\n", __func__, err);
return err;
}
static int bcm_spu_remove(struct platform_device *pdev)
{
int i;
struct device *dev = &pdev->dev;
char *cdn;
for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
/*
* Not all algorithms were registered, depending on whether
* hardware is SPU or SPU2. So here we make sure to skip
* those algorithms that were not previously registered.
*/
if (!driver_algs[i].registered)
continue;
switch (driver_algs[i].type) {
case CRYPTO_ALG_TYPE_SKCIPHER:
crypto_unregister_skcipher(&driver_algs[i].alg.skcipher);
dev_dbg(dev, " unregistered cipher %s\n",
driver_algs[i].alg.skcipher.base.cra_driver_name);
driver_algs[i].registered = false;
break;
case CRYPTO_ALG_TYPE_AHASH:
crypto_unregister_ahash(&driver_algs[i].alg.hash);
cdn = driver_algs[i].alg.hash.halg.base.cra_driver_name;
dev_dbg(dev, " unregistered hash %s\n", cdn);
driver_algs[i].registered = false;
break;
case CRYPTO_ALG_TYPE_AEAD:
crypto_unregister_aead(&driver_algs[i].alg.aead);
dev_dbg(dev, " unregistered aead %s\n",
driver_algs[i].alg.aead.base.cra_driver_name);
driver_algs[i].registered = false;
break;
}
}
spu_free_debugfs();
spu_mb_release(pdev);
return 0;
}
/* ===== Kernel Module API ===== */
static struct platform_driver bcm_spu_pdriver = {
.driver = {
.name = "brcm-spu-crypto",
.of_match_table = of_match_ptr(bcm_spu_dt_ids),
},
.probe = bcm_spu_probe,
.remove = bcm_spu_remove,
};
module_platform_driver(bcm_spu_pdriver);
MODULE_AUTHOR("Rob Rice <rob.rice@broadcom.com>");
MODULE_DESCRIPTION("Broadcom symmetric crypto offload driver");
MODULE_LICENSE("GPL v2");
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