crypto: sun8i-ce - enable working on big endian

On big endian kernel, the sun8i-ce crypto driver does not works.
This patch do the necessary modification to permit it to work on BE
kernel (setting descriptor entries as __le32 and adding some cpu_to_le32)

Fixes: 06f751b61329 ("crypto: allwinner - Add sun8i-ce Crypto Engine")
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
index b6e7c34..37d0b6c 100644 (file)
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
@@ -90,7 +90,9 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
        struct ce_task *cet;
        struct scatterlist *sg;
        unsigned int todo, len, offset, ivsize;
+       dma_addr_t addr_iv = 0, addr_key = 0;
        void *backup_iv = NULL;
+       u32 common, sym;
        int flow, i;
        int nr_sgs = 0;
        int nr_sgd = 0;
@@ -115,28 +117,31 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
        cet = chan->tl;
        memset(cet, 0, sizeof(struct ce_task));
 
-       cet->t_id = flow;
-       cet->t_common_ctl = ce->variant->alg_cipher[algt->ce_algo_id];
-       cet->t_common_ctl |= rctx->op_dir | CE_COMM_INT;
-       cet->t_dlen = areq->cryptlen / 4;
+       cet->t_id = cpu_to_le32(flow);
+       common = ce->variant->alg_cipher[algt->ce_algo_id];
+       common |= rctx->op_dir | CE_COMM_INT;
+       cet->t_common_ctl = cpu_to_le32(common);
        /* CTS and recent CE (H6) need length in bytes, in word otherwise */
        if (ce->variant->has_t_dlen_in_bytes)
-               cet->t_dlen = areq->cryptlen;
+               cet->t_dlen = cpu_to_le32(areq->cryptlen);
+       else
+               cet->t_dlen = cpu_to_le32(areq->cryptlen / 4);
 
-       cet->t_sym_ctl = ce->variant->op_mode[algt->ce_blockmode];
+       sym = ce->variant->op_mode[algt->ce_blockmode];
        len = op->keylen;
        switch (len) {
        case 128 / 8:
-               cet->t_sym_ctl |= CE_AES_128BITS;
+               sym |= CE_AES_128BITS;
                break;
        case 192 / 8:
-               cet->t_sym_ctl |= CE_AES_192BITS;
+               sym |= CE_AES_192BITS;
                break;
        case 256 / 8:
-               cet->t_sym_ctl |= CE_AES_256BITS;
+               sym |= CE_AES_256BITS;
                break;
        }
 
+       cet->t_sym_ctl = cpu_to_le32(sym);
        cet->t_asym_ctl = 0;
 
        chan->op_mode = ce->variant->op_mode[algt->ce_blockmode];
@@ -144,9 +149,9 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
        chan->method = ce->variant->alg_cipher[algt->ce_algo_id];
        chan->keylen = op->keylen;
 
-       cet->t_key = dma_map_single(ce->dev, op->key, op->keylen,
-                                   DMA_TO_DEVICE);
-       if (dma_mapping_error(ce->dev, cet->t_key)) {
+       addr_key = dma_map_single(ce->dev, op->key, op->keylen, DMA_TO_DEVICE);
+       cet->t_key = cpu_to_le32(addr_key);
+       if (dma_mapping_error(ce->dev, addr_key)) {
                dev_err(ce->dev, "Cannot DMA MAP KEY\n");
                err = -EFAULT;
                goto theend;
@@ -171,9 +176,10 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
                                                 ivsize, 0);
                }
                memcpy(chan->bounce_iv, areq->iv, ivsize);
-               cet->t_iv = dma_map_single(ce->dev, chan->bounce_iv,
-                                          chan->ivlen, DMA_TO_DEVICE);
-               if (dma_mapping_error(ce->dev, cet->t_iv)) {
+               addr_iv = dma_map_single(ce->dev, chan->bounce_iv, chan->ivlen,
+                                        DMA_TO_DEVICE);
+               cet->t_iv = cpu_to_le32(addr_iv);
+               if (dma_mapping_error(ce->dev, addr_iv)) {
                        dev_err(ce->dev, "Cannot DMA MAP IV\n");
                        err = -ENOMEM;
                        goto theend_iv;
@@ -208,9 +214,9 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
 
        len = areq->cryptlen;
        for_each_sg(areq->src, sg, nr_sgs, i) {
-               cet->t_src[i].addr = sg_dma_address(sg);
+               cet->t_src[i].addr = cpu_to_le32(sg_dma_address(sg));
                todo = min(len, sg_dma_len(sg));
-               cet->t_src[i].len = todo / 4;
+               cet->t_src[i].len = cpu_to_le32(todo / 4);
                dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
                        areq->cryptlen, i, cet->t_src[i].len, sg->offset, todo);
                len -= todo;
@@ -223,9 +229,9 @@ static int sun8i_ce_cipher(struct skcipher_request *areq)
 
        len = areq->cryptlen;
        for_each_sg(areq->dst, sg, nr_sgd, i) {
-               cet->t_dst[i].addr = sg_dma_address(sg);
+               cet->t_dst[i].addr = cpu_to_le32(sg_dma_address(sg));
                todo = min(len, sg_dma_len(sg));
-               cet->t_dst[i].len = todo / 4;
+               cet->t_dst[i].len = cpu_to_le32(todo / 4);
                dev_dbg(ce->dev, "%s total=%u SG(%d %u off=%d) todo=%u\n", __func__,
                        areq->cryptlen, i, cet->t_dst[i].len, sg->offset, todo);
                len -= todo;
@@ -250,8 +256,8 @@ theend_sgs:
 
 theend_iv:
        if (areq->iv && ivsize > 0) {
-               if (cet->t_iv)
-                       dma_unmap_single(ce->dev, cet->t_iv, chan->ivlen,
+               if (addr_iv)
+                       dma_unmap_single(ce->dev, addr_iv, chan->ivlen,
                                         DMA_TO_DEVICE);
                offset = areq->cryptlen - ivsize;
                if (rctx->op_dir & CE_DECRYPTION) {
@@ -265,7 +271,7 @@ theend_iv:
        }
 
 theend_key:
-       dma_unmap_single(ce->dev, cet->t_key, op->keylen, DMA_TO_DEVICE);
+       dma_unmap_single(ce->dev, addr_key, op->keylen, DMA_TO_DEVICE);
 
 theend:
        return err;

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
index c6ddad3..43db49c 100644 (file)
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
@@ -103,8 +103,8 @@ struct ce_variant {
 };
 
 struct sginfo {
-       u32 addr;
-       u32 len;
+       __le32 addr;
+       __le32 len;
 } __packed;
 
 /*
@@ -112,18 +112,18 @@ struct sginfo {
  * The structure of this descriptor could be found in the datasheet
  */
 struct ce_task {
-       u32 t_id;
-       u32 t_common_ctl;
-       u32 t_sym_ctl;
-       u32 t_asym_ctl;
-       u32 t_key;
-       u32 t_iv;
-       u32 t_ctr;
-       u32 t_dlen;
+       __le32 t_id;
+       __le32 t_common_ctl;
+       __le32 t_sym_ctl;
+       __le32 t_asym_ctl;
+       __le32 t_key;
+       __le32 t_iv;
+       __le32 t_ctr;
+       __le32 t_dlen;
        struct sginfo t_src[MAX_SG];
        struct sginfo t_dst[MAX_SG];
-       u32 next;
-       u32 reserved[3];
+       __le32 next;
+       __le32 reserved[3];
 } __packed __aligned(8);
 
 /*