diff options
Diffstat (limited to 'drivers/misc/issei/dma.h')
| -rw-r--r-- | drivers/misc/issei/dma.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/misc/issei/dma.h b/drivers/misc/issei/dma.h new file mode 100644 index 000000000000..e6b7aeb50ae6 --- /dev/null +++ b/drivers/misc/issei/dma.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2023-2026 Intel Corporation */ +#ifndef _ISSEI_DMA_H_ +#define _ISSEI_DMA_H_ + +#include <linux/types.h> + +struct issei_device; + +/** + * struct issei_dma_length - sizes of DMA memory portions + * @h2f: host to firmware buffer size + * @f2h: firmware to host buffer size + * @ctl: control buffer size + */ +struct issei_dma_length { + size_t h2f; + size_t f2h; + size_t ctl; +}; + +/** + * struct issei_dma - DMA memory structure + * @vaddr: virtual address + * @daddr: physical address + * @length: memory sizes structure + */ +struct issei_dma { + void *vaddr; + dma_addr_t daddr; + struct issei_dma_length length; +}; + +/* Operation statuses */ +#define HAMS_SUCCESS 0x00 +#define HAMS_PROTOCOL_NOT_SUPPORTED 0x01 +#define HAMS_DEPRECATED_BUS_MSG 0x02 +#define HAMS_CLIENT_NOT_EXISTS 0x03 +#define HAMS_MSG_TOO_BIG 0x04 +#define HAMS_MSG_NOT_CONSUMED 0x05 +#define HAMS_CORRUPTED_BUS_MSG 0x06 +#define HAMS_CORRUPTED_HEADER 0x07 +#define HAMS_INVALID_LENGTH 0x08 +#define HAMS_SHARED_MEMORY_SIZE_UNSUPPORTED 0x09 +#define HAMS_GENERAL_FATAL_ERROR 0xff + +/** + * struct issei_dma_data - data passed through channel + * @fw_id: firmware client id + * @host_id: host client id + * @flags: flags bitmap + * @status: operation status + * @length: data length + * @buf: pointer to data buffer + */ +struct issei_dma_data { + u16 fw_id; + u16 host_id; + u32 flags; + u32 status; + u32 length; + void *buf; +}; + +int issei_dmam_setup(struct issei_device *idev); +int issei_dma_write(struct issei_device *idev, const struct issei_dma_data *data); +int issei_dma_read(struct issei_device *idev, struct issei_dma_data *data); + +#endif /*_ISSEI_DMA_H_*/ |