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;
}
int ss_hash_start(ss_hash_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_DBG("Flow: %d, Dir: %d, Method: %d, Mode: %d, len: %d / %d \n", flow,
req_ctx->dir, req_ctx->type, req_ctx->mode, len, ctx->cnt);
SS_DBG("IV address = 0x%p, size = %d\n", ctx->md, ctx->md_size);
ss_iv_set(ctx->md, ctx->md_size);
ss_iv_mode_set(SS_IV_MODE_ARBITRARY);
init_completion(&req_ctx->done);
if (ss_dma_prepare(&req_ctx->dma_src))
return -EBUSY;
ret = ss_dma_src_config(ss_dev, ctx, req_ctx, len, 1);
if (ret == 0) {
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_md_get(ctx->md, NULL, ctx->md_size);
}
ss_dma_disable(flow);
ss_dma_release(ss_dev, &req_ctx->dma_src);
ctx->cnt += len;
return 0;
}
static int ss_hash_start(ss_hash_ctx_t *ctx, ss_aes_req_ctx_t *req_ctx, int len)
{
int ret = 0;
int flow = ctx->comm.flow;
int md_map_flag = 0;
ss_pending_clear(flow);
ss_irq_enable(flow);
ss_flow_enable(flow);
ss_method_set(req_ctx->dir, req_ctx->type);
SS_DBG("Flow: %d, Dir: %d, Method: %d, Mode: %d, len: %d / %d \n", flow,
req_ctx->dir, req_ctx->type, req_ctx->mode, len, ctx->cnt);
SS_DBG("IV address = 0x%p, size = %d\n", ctx->md, ctx->md_size);
ss_iv_set(ctx->md, ctx->md_size);
ss_iv_mode_set(SS_IV_MODE_ARBITRARY);
init_completion(&req_ctx->done);
if (ss_dma_prepare(&req_ctx->dma_src))
return -EBUSY;
ret = ss_dma_src_config(ss_dev, ctx, req_ctx, len, 1);
if (ret == 0) {
/* 1. Copy data from user space to sss->flows[flow].buf_src. */
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);
ss_data_len_set((len - len%SHA1_BLOCK_SIZE)/4);
#ifdef SS_SHA_SWAP_MID_ENABLE
if (req_ctx->type != SS_METHOD_MD5)
ss_hash_swap(ctx->md, ctx->md_size);
#endif
dma_map_single(&ss_dev->pdev->dev, ctx->md, ctx->md_size, DMA_MEM_TO_DEV);
md_map_flag = 1;
SS_DBG("Before SS, CTRL: 0x%08x \n", ss_reg_rd(SS_REG_CTL));
dma_map_single(&ss_dev->pdev->dev, ss_dev->flows[flow].buf_dst, ctx->md_size, DMA_DEV_TO_MEM);
ss_ctrl_start();
ret = wait_for_completion_timeout(&ss_dev->flows[flow].done, msecs_to_jiffies(SS_WAIT_TIME));
if (ret == 0) {
SS_ERR("Timed out\n");
ss_reset();
return -ETIMEDOUT;
}
SS_DBG("After SS, CTRL: 0x%08x \n", ss_reg_rd(SS_REG_CTL));
SS_DBG("After SS, dst data: \n");
print_hex(ss_dev->flows[flow].buf_dst, 32, (int)ss_dev->flows[flow].buf_dst);
/* 3. Copy the MD from sss->buf_dst to ctx->md. */
memcpy(ctx->md, ss_dev->flows[flow].buf_dst, ctx->md_size);
}
ss_ctrl_stop();
ss_irq_disable(flow);
if (md_map_flag == 1) {
dma_unmap_single(&ss_dev->pdev->dev, ss_dev->flows[flow].buf_dst_dma, ctx->md_size, DMA_DEV_TO_MEM);
dma_unmap_single(&ss_dev->pdev->dev, virt_to_phys(ctx->md), ctx->md_size, DMA_MEM_TO_DEV);
}
ss_dma_release(ss_dev, &req_ctx->dma_src);
ctx->cnt += len;
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;
}
