static int ss_aes_start(ss_aes_ctx_t *ctx, ss_aes_req_ctx_t *req_ctx, int len) { int ret = 0; int flow = ctx->comm.flow; ss_pending_clear(flow); ss_dma_enable(flow); ss_fifo_init(); ss_method_set(req_ctx->dir, req_ctx->type); ss_aes_mode_set(req_ctx->mode); SS_DBG("Flow: %d, Dir: %d, Method: %d, Mode: %d, len: %d \n", flow, req_ctx->dir, req_ctx->type, req_ctx->mode, len); init_completion(&req_ctx->done); if (ss_dma_prepare(&req_ctx->dma_src)) return -EBUSY; ss_dma_prepare(&req_ctx->dma_dst); ss_dma_src_config(ss_dev, ctx, req_ctx, len, 0); ss_dma_dst_config(ss_dev, ctx, req_ctx, len, 1); ss_dma_start(&req_ctx->dma_dst); ss_ctrl_start(); ss_dma_start(&req_ctx->dma_src); ret = wait_for_completion_timeout(&req_ctx->done, msecs_to_jiffies(SS_WAIT_TIME)); if (ret == 0) { SS_ERR("Timed out\n"); ss_reset(); return -ETIMEDOUT; } ss_ctrl_stop(); ss_dma_disable(flow); ss_dma_release(ss_dev, &req_ctx->dma_src); ss_dma_release(ss_dev, &req_ctx->dma_dst); return 0; }
static int ss_aes_start(ss_aes_ctx_t *ctx, ss_aes_req_ctx_t *req_ctx, int len) { int ret = 0; int flow = ctx->comm.flow; ss_pending_clear(flow); ss_irq_enable(flow); ss_flow_enable(flow); ss_method_set(req_ctx->dir, req_ctx->type); ss_aes_mode_set(req_ctx->mode); SS_DBG("Flow: %d, Dir: %d, Method: %d, Mode: %d, len: %d \n", flow, req_ctx->dir, req_ctx->type, req_ctx->mode, len); init_completion(&req_ctx->done); /* 1. Copy data from user space to sss->flows[flow].buf_src. */ if (ss_dma_prepare(&req_ctx->dma_src)) return -EBUSY; #ifdef SS_CTR_MODE_ENABLE if ((req_ctx->mode == SS_AES_MODE_CTR) && ((len%AES_BLOCK_SIZE) != 0)) memset(&ss_dev->flows[flow].buf_src[len], 0, AES_BLOCK_SIZE); #endif ss_dma_src_config(ss_dev, ctx, req_ctx, len, 1); ss_dma_start(&req_ctx->dma_src); ret = wait_for_completion_timeout(&req_ctx->done, msecs_to_jiffies(SS_WAIT_TIME)); if (ret == 0) { SS_ERR("Timed out\n"); return -ETIMEDOUT; } /* 2. Start the SS. */ ss_data_src_set(ss_dev->flows[flow].buf_src_dma); ss_data_dst_set(ss_dev->flows[flow].buf_dst_dma); SS_DBG("ss_dev->buf_dst_dma = %#x\n", ss_dev->flows[flow].buf_dst_dma); #ifdef SS_CTS_MODE_ENABLE if (req_ctx->mode == SS_AES_MODE_CTS) { ss_data_len_set(len); if (len < SZ_4K) /* A bad way to determin the last packet of CTS mode. */ ss_cts_last(); } else #endif ss_data_len_set(DIV_ROUND_UP(len, AES_BLOCK_SIZE)*4); ss_ctrl_start(); ret = wait_for_completion_timeout(&ss_dev->flows[flow].done, msecs_to_jiffies(SS_WAIT_TIME*50)); if (ret == 0) { SS_ERR("Timed out\n"); ss_reset(); return -ETIMEDOUT; } /* 3. Copy the result from sss->flows[flow].buf_dst to user space. */ if (ss_dma_prepare(&req_ctx->dma_dst)) return -EBUSY; ss_dma_dst_config(ss_dev, ctx, req_ctx, len, 1); ss_dma_start(&req_ctx->dma_dst); ret = wait_for_completion_timeout(&req_ctx->done, msecs_to_jiffies(SS_WAIT_TIME)); if (ret == 0) { SS_ERR("Timed out\n"); return -ETIMEDOUT; } ss_ctrl_stop(); ss_irq_disable(flow); ss_dma_release(ss_dev, &req_ctx->dma_src); ss_dma_release(ss_dev, &req_ctx->dma_dst); return 0; }