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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // 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/md5.h>
 #include <crypto/authenc.h>
 #include <crypto/skcipher.h>
 #include <crypto/hash.h>
 #include <crypto/sha1.h>
 #include <crypto/sha2.h>
 #include <crypto/sha3.h>
 
 #include "util.h"
 #include "cipher.h"
 #include "spu.h"
 #include "spum.h"
 #include "spu2.h"
 
 /* ================= Device Structure ================== */
 
 struct bcm_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 (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;
     unsigned int chunksize; /* Num bytes of request to submit */
     int remaining;  /* 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 */
     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->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));
 
     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, 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;
     struct crypto_async_request *areq = rctx->parent;
     struct skcipher_request *req = skcipher_request_cast(areq);
     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);
 
     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;
     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;
     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));
     /*
      * 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
  * @req:    Crypto API request
  * @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;
 
     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:
         return -EINVAL;
     }
     WARN_ON((ctx->max_payload != SPU_MAX_PAYLOAD_INF) &&
         ((ctx->max_payload % AES_BLOCK_SIZE) != 0));
     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;
     default:
         pr_err("%s() Error: unknown cipher alg\n", __func__);
         err = -EINVAL;
     }
     if (err)
         return err;
 
     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;
     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;
 
     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;
     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);
     }
 
     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;
 
     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;
 
     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;
     }
 
     memcpy(ctx->enckey, key, ctx->enckeylen);
 
     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);
     }
 
     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;
 
     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__);
 
     if (keylen < GCM_ESP_SALT_SIZE)
         return -EINVAL;
 
     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__);
 
     if (keylen < GCM_ESP_SALT_SIZE)
         return -EINVAL;
 
     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__);
 
     if (keylen < CCM_ESP_SALT_SIZE)
         return -EINVAL;
 
     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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 |
                      CRYPTO_ALG_ALLOCATES_MEMORY
          },
          .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 = "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 |
                          CRYPTO_ALG_ALLOCATES_MEMORY,
                 }
               },
      .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 = 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 skcipher_alg *crypto = &driver_alg->alg.skcipher;
     int err;
 
     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_ALLOCATES_MEMORY |
                  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 |
                     CRYPTO_ALG_ALLOCATES_MEMORY;
     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 | CRYPTO_ALG_ALLOCATES_MEMORY;
     /* 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(dev, "Failed to match device\n");
         return -ENODEV;
     }
 
     spu->spu_type = matched_spu_type->type;
     spu->spu_subtype = matched_spu_type->subtype;
 
     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(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;
 
     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(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(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");