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crypto: omap-aes - Add support for multiple cores

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Some SoCs like omap4/omap5/dra7 contain multiple AES crypto accelerator
cores. Adapt the driver to support this. The driver picks the last used
device from a list of AES devices.

Signed-off-by: Lokesh Vutla <[email protected]>
[[email protected]: forward ported to 4.7 kernel]
Signed-off-by: Tero Kristo <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Lokesh Vutla 2016-08-04 13:28:43 +03:00 • committed by Herbert Xu
commit 164f3ef301
1 changed files with 6 additions and 14 deletions
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20
drivers/crypto/omap-aes.c
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@ -330,20 +330,12 @@ static void omap_aes_dma_stop(struct omap_aes_dev *dd)
static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
{
struct omap_aes_dev *dd = NULL, *tmp;
struct omap_aes_dev *dd;
spin_lock_bh(&list_lock);
if (!ctx->dd) {
list_for_each_entry(tmp, &dev_list, list) {
/* FIXME: take fist available aes core */
dd = tmp;
break;
}
ctx->dd = dd;
} else {
/* already found before */
dd = ctx->dd;
}
dd = list_first_entry(&dev_list, struct omap_aes_dev, list);
list_move_tail(&dd->list, &dev_list);
ctx->dd = dd;
spin_unlock_bh(&list_lock);
return dd;
@ -616,7 +608,7 @@ static int omap_aes_prepare_req(struct crypto_engine *engine,
{
struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
struct omap_aes_dev *dd = omap_aes_find_dev(ctx);
struct omap_aes_dev *dd = ctx->dd;
struct omap_aes_reqctx *rctx;
if (!dd)
@ -662,7 +654,7 @@ static int omap_aes_crypt_req(struct crypto_engine *engine,
{
struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
crypto_ablkcipher_reqtfm(req));
struct omap_aes_dev *dd = omap_aes_find_dev(ctx);
struct omap_aes_dev *dd = ctx->dd;
if (!dd)
return -ENODEV;