diff options
| -rw-r--r-- | drivers/crypto/omap-aes.c | 120 |
1 files changed, 28 insertions, 92 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 379d70157ae7..e60d2973321d 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -38,6 +38,8 @@ #include <crypto/engine.h> #include <crypto/internal/skcipher.h> +#include "omap-crypto.h" + #define DST_MAXBURST 4 #define DMA_MIN (DST_MAXBURST * sizeof(u32)) @@ -98,6 +100,9 @@ #define FLAGS_FAST BIT(5) #define FLAGS_BUSY BIT(6) +#define FLAGS_IN_DATA_ST_SHIFT 8 +#define FLAGS_OUT_DATA_ST_SHIFT 10 + #define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2) struct omap_aes_ctx { @@ -173,7 +178,6 @@ struct omap_aes_dev { struct scatterlist in_sgl; struct scatterlist out_sgl; struct scatterlist *orig_out; - int sgs_copied; struct scatter_walk in_walk; struct scatter_walk out_walk; @@ -385,20 +389,6 @@ static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) dma_release_channel(dd->dma_lch_in); } -static void sg_copy_buf(void *buf, struct scatterlist *sg, - unsigned int start, unsigned int nbytes, int out) -{ - struct scatter_walk walk; - - if (!nbytes) - return; - - scatterwalk_start(&walk, sg); - scatterwalk_advance(&walk, start); - scatterwalk_copychunks(buf, &walk, nbytes, out); - scatterwalk_done(&walk, out, 0); -} - static int omap_aes_crypt_dma(struct omap_aes_dev *dd, struct scatterlist *in_sg, struct scatterlist *out_sg, @@ -534,62 +524,6 @@ static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) return 0; } -static int omap_aes_check_aligned(struct scatterlist *sg, int total) -{ - int len = 0; - - if (!IS_ALIGNED(total, AES_BLOCK_SIZE)) - return -EINVAL; - - while (sg) { - if (!IS_ALIGNED(sg->offset, 4)) - return -1; - if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) - return -1; - - len += sg->length; - sg = sg_next(sg); - } - - if (len != total) - return -1; - - return 0; -} - -static int omap_aes_copy_sgs(struct omap_aes_dev *dd) -{ - void *buf_in, *buf_out; - int pages, total; - - total = ALIGN(dd->total, AES_BLOCK_SIZE); - pages = get_order(total); - - buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages); - buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages); - - if (!buf_in || !buf_out) { - pr_err("Couldn't allocated pages for unaligned cases.\n"); - return -1; - } - - dd->orig_out = dd->out_sg; - - sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0); - - sg_init_table(&dd->in_sgl, 1); - sg_set_buf(&dd->in_sgl, buf_in, total); - dd->in_sg = &dd->in_sgl; - dd->in_sg_len = 1; - - sg_init_table(&dd->out_sgl, 1); - sg_set_buf(&dd->out_sgl, buf_out, total); - dd->out_sg = &dd->out_sgl; - dd->out_sg_len = 1; - - return 0; -} - static int omap_aes_handle_queue(struct omap_aes_dev *dd, struct ablkcipher_request *req) { @@ -606,6 +540,8 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, crypto_ablkcipher_reqtfm(req)); struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req); struct omap_aes_dev *dd = rctx->dd; + int ret; + u16 flags; if (!dd) return -ENODEV; @@ -616,6 +552,23 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, dd->total_save = req->nbytes; dd->in_sg = req->src; dd->out_sg = req->dst; + dd->orig_out = req->dst; + + flags = OMAP_CRYPTO_COPY_DATA; + if (req->src == req->dst) + flags |= OMAP_CRYPTO_FORCE_COPY; + + ret = omap_crypto_align_sg(&dd->in_sg, dd->total, AES_BLOCK_SIZE, + &dd->in_sgl, flags, + FLAGS_IN_DATA_ST_SHIFT, &dd->flags); + if (ret) + return ret; + + ret = omap_crypto_align_sg(&dd->out_sg, dd->total, AES_BLOCK_SIZE, + &dd->out_sgl, 0, + FLAGS_OUT_DATA_ST_SHIFT, &dd->flags); + if (ret) + return ret; dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total); if (dd->in_sg_len < 0) @@ -625,15 +578,6 @@ static int omap_aes_prepare_req(struct crypto_engine *engine, if (dd->out_sg_len < 0) return dd->out_sg_len; - if (omap_aes_check_aligned(dd->in_sg, dd->total) || - omap_aes_check_aligned(dd->out_sg, dd->total)) { - if (omap_aes_copy_sgs(dd)) - pr_err("Failed to copy SGs for unaligned cases\n"); - dd->sgs_copied = 1; - } else { - dd->sgs_copied = 0; - } - rctx->mode &= FLAGS_MODE_MASK; dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; @@ -658,8 +602,6 @@ static int omap_aes_crypt_req(struct crypto_engine *engine, static void omap_aes_done_task(unsigned long data) { struct omap_aes_dev *dd = (struct omap_aes_dev *)data; - void *buf_in, *buf_out; - int pages, len; pr_debug("enter done_task\n"); @@ -672,17 +614,11 @@ static void omap_aes_done_task(unsigned long data) omap_aes_crypt_dma_stop(dd); } - if (dd->sgs_copied) { - buf_in = sg_virt(&dd->in_sgl); - buf_out = sg_virt(&dd->out_sgl); + omap_crypto_cleanup(&dd->in_sgl, NULL, 0, dd->total_save, + FLAGS_IN_DATA_ST_SHIFT, dd->flags); - sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1); - - len = ALIGN(dd->total_save, AES_BLOCK_SIZE); - pages = get_order(len); - free_pages((unsigned long)buf_in, pages); - free_pages((unsigned long)buf_out, pages); - } + omap_crypto_cleanup(&dd->out_sgl, dd->orig_out, 0, dd->total_save, + FLAGS_OUT_DATA_ST_SHIFT, dd->flags); omap_aes_finish_req(dd, 0); |