On Tue, Aug 16, 2022 at 04:00:43PM +0200, Linus Walleij wrote:
>
> -static int ahash_noimport(struct ahash_request *req, const void *in)
> +static int ahash_import(struct ahash_request *req, const void *in)
> {
> - return -ENOSYS;
> + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
> + struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
> + struct hash_device_data *device_data = ctx->device;
> + struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
> + const struct hash_state *hstate = in;
> + int hash_mode = HASH_OPER_MODE_HASH;
> + u32 cr;
> + s32 count;
> +
> + /* Restore software state */
> + req_ctx->length = hstate->length;
> + req_ctx->index = hstate->index;
> + req_ctx->dma_mode = hstate->dma_mode;
> + req_ctx->hw_initialized = hstate->hw_initialized;
> + memcpy(req_ctx->buffer, hstate->buffer, HASH_BLOCK_SIZE);
> +
> + /*
> + * Restore hardware state
> + * INIT bit. Set this bit to 0b1 to reset the HASH processor core and
> + * prepare the initialize the HASH accelerator to compute the message
> + * digest of a new message.
> + */
> + HASH_INITIALIZE;
> +
> + cr = hstate->temp_cr;
> + writel_relaxed(cr & HASH_CR_RESUME_MASK, &device_data->base->cr);
> +
> + if (readl(&device_data->base->cr) & HASH_CR_MODE_MASK)
> + hash_mode = HASH_OPER_MODE_HMAC;
> + else
> + hash_mode = HASH_OPER_MODE_HASH;
> +
> + for (count = 0; count < HASH_CSR_COUNT; count++) {
> + if ((count >= 36) && (hash_mode == HASH_OPER_MODE_HASH))
> + break;
> + writel_relaxed(hstate->csr[count],
> + &device_data->base->csrx[count]);
> + }
> +
> + writel_relaxed(hstate->csfull, &device_data->base->csfull);
> + writel_relaxed(hstate->csdatain, &device_data->base->csdatain);
> + writel_relaxed(hstate->str_reg, &device_data->base->str);
> + writel_relaxed(cr, &device_data->base->cr);
> +
> + return 0;
> }
At any time we may have multiple requests outstanding for a given
tfm/device, so I'm a bit worried with the direct writes to hardware
in the import function.
Normally import just transfers data from the caller into the
request object as a "soft" state, while the actual update/final
functions will then move them into the hardware state as needed.
Thanks,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
