fsl_dpaa_fd.h

/*
 * Copyright (C) 2014 Freescale Semiconductor
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#ifndef __FSL_DPAA_FD_H
#define __FSL_DPAA_FD_H

/* Place-holder for FDs, we represent it via the simplest form that we need for
 * now. Different overlays may be needed to support different options, etc. (It
 * is impractical to define One True Struct, because the resulting encoding
 * routines (lots of read-modify-writes) would be worst-case performance whether
 * or not circumstances required them.) */
struct dpaa_fd {
	union {
		u32 words[8];
		struct dpaa_fd_simple {
			u32 addr_lo;
			u32 addr_hi;
			u32 len;
			/* offset in the MS 16 bits, BPID in the LS 16 bits */
			u32 bpid_offset;
			u32 frc; /* frame context */
			/* "err", "va", "cbmt", "asal", [...] */
			u32 ctrl;
			/* flow context */
			u32 flc_lo;
			u32 flc_hi;
		} simple;
	};
};

enum dpaa_fd_format {
	dpaa_fd_single = 0,
	dpaa_fd_list,
	dpaa_fd_sg
};

static inline u64 ldpaa_fd_get_addr(const struct dpaa_fd *fd)
{
	return (u64)((((uint64_t)fd->simple.addr_hi) << 32)
				+ fd->simple.addr_lo);
}

static inline void ldpaa_fd_set_addr(struct dpaa_fd *fd, u64 addr)
{
	fd->simple.addr_hi = upper_32_bits(addr);
	fd->simple.addr_lo = lower_32_bits(addr);
}

static inline u32 ldpaa_fd_get_len(const struct dpaa_fd *fd)
{
	return fd->simple.len;
}

static inline void ldpaa_fd_set_len(struct dpaa_fd *fd, u32 len)
{
	fd->simple.len = len;
}

static inline uint16_t ldpaa_fd_get_offset(const struct dpaa_fd *fd)
{
	return (uint16_t)(fd->simple.bpid_offset >> 16) & 0x0FFF;
}

static inline void ldpaa_fd_set_offset(struct dpaa_fd *fd, uint16_t offset)
{
	fd->simple.bpid_offset &= 0xF000FFFF;
	fd->simple.bpid_offset |= (u32)offset << 16;
}