diff options
Diffstat (limited to 'drivers/crypto/qce/dma.h')
| -rw-r--r-- | drivers/crypto/qce/dma.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/crypto/qce/dma.h b/drivers/crypto/qce/dma.h new file mode 100644 index 000000000..65bedb81d --- /dev/null +++ b/drivers/crypto/qce/dma.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _DMA_H_ +#define _DMA_H_ + +#include <linux/dmaengine.h> + +/* maximum data transfer block size between BAM and CE */ +#define QCE_BAM_BURST_SIZE 64 + +#define QCE_AUTHIV_REGS_CNT 16 +#define QCE_AUTH_BYTECOUNT_REGS_CNT 4 +#define QCE_CNTRIV_REGS_CNT 4 + +struct qce_result_dump { + u32 auth_iv[QCE_AUTHIV_REGS_CNT]; + u32 auth_byte_count[QCE_AUTH_BYTECOUNT_REGS_CNT]; + u32 encr_cntr_iv[QCE_CNTRIV_REGS_CNT]; + u32 status; + u32 status2; +}; + +#define QCE_IGNORE_BUF_SZ (2 * QCE_BAM_BURST_SIZE) +#define QCE_RESULT_BUF_SZ \ + ALIGN(sizeof(struct qce_result_dump), QCE_BAM_BURST_SIZE) + +struct qce_dma_data { + struct dma_chan *txchan; + struct dma_chan *rxchan; + struct qce_result_dump *result_buf; + void *ignore_buf; +}; + +int qce_dma_request(struct device *dev, struct qce_dma_data *dma); +void qce_dma_release(struct qce_dma_data *dma); +int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in, + int in_ents, struct scatterlist *sg_out, int out_ents, + dma_async_tx_callback cb, void *cb_param); +void qce_dma_issue_pending(struct qce_dma_data *dma); +int qce_dma_terminate_all(struct qce_dma_data *dma); +int qce_countsg(struct scatterlist *sg_list, int nbytes, bool *chained); +void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, bool chained); +int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, bool chained); +struct scatterlist * +qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add); + +#endif /* _DMA_H_ */ |