arch/sparc/include/asm/ebus_dma.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SPARC_EBUS_DMA_H
   3 #define __ASM_SPARC_EBUS_DMA_H
   4
   5 struct ebus_dma_info {
   6         spinlock_t      lock;
   7         void __iomem    *regs;
   8
   9         unsigned int    flags;
  10 #define EBUS_DMA_FLAG_USE_EBDMA_HANDLER         0x00000001
  11 #define EBUS_DMA_FLAG_TCI_DISABLE               0x00000002
  12
  13         /* These are only valid is EBUS_DMA_FLAG_USE_EBDMA_HANDLER is
  14          * set.
  15          */
  16         void (*callback)(struct ebus_dma_info *p, int event, void *cookie);
  17         void *client_cookie;
  18         unsigned int    irq;
  19 #define EBUS_DMA_EVENT_ERROR    1
  20 #define EBUS_DMA_EVENT_DMA      2
  21 #define EBUS_DMA_EVENT_DEVICE   4
  22
  23         unsigned char   name[64];
  24 };
  25
  26 int ebus_dma_register(struct ebus_dma_info *p);
  27 int ebus_dma_irq_enable(struct ebus_dma_info *p, int on);
  28 void ebus_dma_unregister(struct ebus_dma_info *p);
  29 int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr,
  30                             size_t len);
  31 void ebus_dma_prepare(struct ebus_dma_info *p, int write);
  32 unsigned int ebus_dma_residue(struct ebus_dma_info *p);
  33 unsigned int ebus_dma_addr(struct ebus_dma_info *p);
  34 void ebus_dma_enable(struct ebus_dma_info *p, int on);
  35
  36 #endif /* __ASM_SPARC_EBUS_DMA_H */