diff options
Diffstat (limited to 'drivers/dma/dw-edma/dw-edma-core.h')
-rw-r--r-- | drivers/dma/dw-edma/dw-edma-core.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h new file mode 100644 index 0000000000..71894b9e0b --- /dev/null +++ b/drivers/dma/dw-edma/dw-edma-core.h @@ -0,0 +1,209 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018-2019 Synopsys, Inc. and/or its affiliates. + * Synopsys DesignWare eDMA core driver + * + * Author: Gustavo Pimentel <gustavo.pimentel@synopsys.com> + */ + +#ifndef _DW_EDMA_CORE_H +#define _DW_EDMA_CORE_H + +#include <linux/msi.h> +#include <linux/dma/edma.h> + +#include "../virt-dma.h" + +#define EDMA_LL_SZ 24 + +enum dw_edma_dir { + EDMA_DIR_WRITE = 0, + EDMA_DIR_READ +}; + +enum dw_edma_request { + EDMA_REQ_NONE = 0, + EDMA_REQ_STOP, + EDMA_REQ_PAUSE +}; + +enum dw_edma_status { + EDMA_ST_IDLE = 0, + EDMA_ST_PAUSE, + EDMA_ST_BUSY +}; + +enum dw_edma_xfer_type { + EDMA_XFER_SCATTER_GATHER = 0, + EDMA_XFER_CYCLIC, + EDMA_XFER_INTERLEAVED +}; + +struct dw_edma_chan; +struct dw_edma_chunk; + +struct dw_edma_burst { + struct list_head list; + u64 sar; + u64 dar; + u32 sz; +}; + +struct dw_edma_chunk { + struct list_head list; + struct dw_edma_chan *chan; + struct dw_edma_burst *burst; + + u32 bursts_alloc; + + u8 cb; + struct dw_edma_region ll_region; /* Linked list */ +}; + +struct dw_edma_desc { + struct virt_dma_desc vd; + struct dw_edma_chan *chan; + struct dw_edma_chunk *chunk; + + u32 chunks_alloc; + + u32 alloc_sz; + u32 xfer_sz; +}; + +struct dw_edma_chan { + struct virt_dma_chan vc; + struct dw_edma *dw; + int id; + enum dw_edma_dir dir; + + u32 ll_max; + + struct msi_msg msi; + + enum dw_edma_request request; + enum dw_edma_status status; + u8 configured; + + struct dma_slave_config config; +}; + +struct dw_edma_irq { + struct msi_msg msi; + u32 wr_mask; + u32 rd_mask; + struct dw_edma *dw; +}; + +struct dw_edma { + char name[32]; + + struct dma_device dma; + + u16 wr_ch_cnt; + u16 rd_ch_cnt; + + struct dw_edma_irq *irq; + int nr_irqs; + + struct dw_edma_chan *chan; + + raw_spinlock_t lock; /* Only for legacy */ + + struct dw_edma_chip *chip; + + const struct dw_edma_core_ops *core; +}; + +typedef void (*dw_edma_handler_t)(struct dw_edma_chan *); + +struct dw_edma_core_ops { + void (*off)(struct dw_edma *dw); + u16 (*ch_count)(struct dw_edma *dw, enum dw_edma_dir dir); + enum dma_status (*ch_status)(struct dw_edma_chan *chan); + irqreturn_t (*handle_int)(struct dw_edma_irq *dw_irq, enum dw_edma_dir dir, + dw_edma_handler_t done, dw_edma_handler_t abort); + void (*start)(struct dw_edma_chunk *chunk, bool first); + void (*ch_config)(struct dw_edma_chan *chan); + void (*debugfs_on)(struct dw_edma *dw); +}; + +struct dw_edma_sg { + struct scatterlist *sgl; + unsigned int len; +}; + +struct dw_edma_cyclic { + dma_addr_t paddr; + size_t len; + size_t cnt; +}; + +struct dw_edma_transfer { + struct dma_chan *dchan; + union dw_edma_xfer { + struct dw_edma_sg sg; + struct dw_edma_cyclic cyclic; + struct dma_interleaved_template *il; + } xfer; + enum dma_transfer_direction direction; + unsigned long flags; + enum dw_edma_xfer_type type; +}; + +static inline +struct dw_edma_chan *vc2dw_edma_chan(struct virt_dma_chan *vc) +{ + return container_of(vc, struct dw_edma_chan, vc); +} + +static inline +struct dw_edma_chan *dchan2dw_edma_chan(struct dma_chan *dchan) +{ + return vc2dw_edma_chan(to_virt_chan(dchan)); +} + +static inline +void dw_edma_core_off(struct dw_edma *dw) +{ + dw->core->off(dw); +} + +static inline +u16 dw_edma_core_ch_count(struct dw_edma *dw, enum dw_edma_dir dir) +{ + return dw->core->ch_count(dw, dir); +} + +static inline +enum dma_status dw_edma_core_ch_status(struct dw_edma_chan *chan) +{ + return chan->dw->core->ch_status(chan); +} + +static inline irqreturn_t +dw_edma_core_handle_int(struct dw_edma_irq *dw_irq, enum dw_edma_dir dir, + dw_edma_handler_t done, dw_edma_handler_t abort) +{ + return dw_irq->dw->core->handle_int(dw_irq, dir, done, abort); +} + +static inline +void dw_edma_core_start(struct dw_edma *dw, struct dw_edma_chunk *chunk, bool first) +{ + dw->core->start(chunk, first); +} + +static inline +void dw_edma_core_ch_config(struct dw_edma_chan *chan) +{ + chan->dw->core->ch_config(chan); +} + +static inline +void dw_edma_core_debugfs_on(struct dw_edma *dw) +{ + dw->core->debugfs_on(dw); +} + +#endif /* _DW_EDMA_CORE_H */ |