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/* $OpenBSD: imxenet.h,v 1.1 2013/09/06 20:45:53 patrick Exp $ */
/*
* Copyright (c) 2012-2013 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* what should we use? */
#define ENET_MAX_TXD 32
#define ENET_MAX_RXD 32
#define ENET_MAX_PKT_SIZE 1536
#define ENET_ROUNDUP(size, unit) (((size) + (unit) - 1) & ~((unit) - 1))
/* buffer descriptor status bits */
#define ENET_RXD_EMPTY (1 << 15)
#define ENET_RXD_WRAP (1 << 13)
#define ENET_RXD_LAST (1 << 11)
#define ENET_RXD_MISS (1 << 8)
#define ENET_RXD_BC (1 << 7)
#define ENET_RXD_MC (1 << 6)
#define ENET_RXD_LG (1 << 5)
#define ENET_RXD_NO (1 << 4)
#define ENET_RXD_CR (1 << 2)
#define ENET_RXD_OV (1 << 1)
#define ENET_RXD_TR (1 << 0)
#define ENET_TXD_READY (1 << 15)
#define ENET_TXD_WRAP (1 << 13)
#define ENET_TXD_LAST (1 << 11)
#define ENET_TXD_TC (1 << 10)
#define ENET_TXD_ABC (1 << 9)
#define ENET_TXD_STATUS_MASK 0x3ff
#ifdef ENET_ENHANCED_BD
/* enhanced */
#define ENET_RXD_INT (1 << 23)
#define ENET_TXD_INT (1 << 30)
#endif
/*
* Bus dma allocation structure used by
* imxenet_dma_malloc and imxenet_dma_free.
*/
struct imxenet_dma_alloc {
bus_addr_t dma_paddr;
caddr_t dma_vaddr;
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
bus_dma_segment_t dma_seg;
bus_size_t dma_size;
int dma_nseg;
};
struct imxenet_buf_desc {
uint16_t data_length; /* payload's length in bytes */
uint16_t status; /* BD's status (see datasheet) */
uint32_t data_pointer; /* payload's buffer address */
#ifdef ENET_ENHANCED_BD
uint32_t enhanced_status; /* enhanced status with IEEE 1588 */
uint32_t reserved0; /* reserved */
uint32_t update_done; /* buffer descriptor update done */
uint32_t timestamp; /* IEEE 1588 timestamp */
uint32_t reserved1[2]; /* reserved */
#endif
};
struct imxenet_buffer {
uint8_t data[ENET_MAX_PKT_SIZE];
};
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