2 * Copyright (C) 2014 Freescale Semiconductor
4 * SPDX-License-Identifier: GPL-2.0+
6 #ifndef __FSL_DPAA_FD_H
7 #define __FSL_DPAA_FD_H
9 /* Place-holder for FDs, we represent it via the simplest form that we need for
10 * now. Different overlays may be needed to support different options, etc. (It
11 * is impractical to define One True Struct, because the resulting encoding
12 * routines (lots of read-modify-writes) would be worst-case performance whether
13 * or not circumstances required them.) */
17 struct dpaa_fd_simple {
21 /* offset in the MS 16 bits, BPID in the LS 16 bits */
23 u32 frc; /* frame context */
24 /* "err", "va", "cbmt", "asal", [...] */
39 static inline u64 ldpaa_fd_get_addr(const struct dpaa_fd *fd)
41 return (u64)((((uint64_t)fd->simple.addr_hi) << 32)
42 + fd->simple.addr_lo);
45 static inline void ldpaa_fd_set_addr(struct dpaa_fd *fd, u64 addr)
47 fd->simple.addr_hi = upper_32_bits(addr);
48 fd->simple.addr_lo = lower_32_bits(addr);
51 static inline u32 ldpaa_fd_get_len(const struct dpaa_fd *fd)
53 return fd->simple.len;
56 static inline void ldpaa_fd_set_len(struct dpaa_fd *fd, u32 len)
61 static inline uint16_t ldpaa_fd_get_offset(const struct dpaa_fd *fd)
63 return (uint16_t)(fd->simple.bpid_offset >> 16) & 0x0FFF;
66 static inline void ldpaa_fd_set_offset(struct dpaa_fd *fd, uint16_t offset)
68 fd->simple.bpid_offset &= 0xF000FFFF;
69 fd->simple.bpid_offset |= (u32)offset << 16;
72 static inline uint16_t ldpaa_fd_get_bpid(const struct dpaa_fd *fd)
74 return (uint16_t)(fd->simple.bpid_offset & 0xFFFF);
77 static inline void ldpaa_fd_set_bpid(struct dpaa_fd *fd, uint16_t bpid)
79 fd->simple.bpid_offset &= 0xFFFF0000;
80 fd->simple.bpid_offset |= (u32)bpid;
83 /* When frames are dequeued, the FDs show up inside "dequeue" result structures
84 * (if at all, not all dequeue results contain valid FDs). This structure type
85 * is intentionally defined without internal detail, and the only reason it
86 * isn't declared opaquely (without size) is to allow the user to provide
87 * suitably-sized (and aligned) memory for these entries. */
89 uint32_t dont_manipulate_directly[16];
92 /* Parsing frame dequeue results */
93 #define LDPAA_DQ_STAT_FQEMPTY 0x80
94 #define LDPAA_DQ_STAT_HELDACTIVE 0x40
95 #define LDPAA_DQ_STAT_FORCEELIGIBLE 0x20
96 #define LDPAA_DQ_STAT_VALIDFRAME 0x10
97 #define LDPAA_DQ_STAT_ODPVALID 0x04
98 #define LDPAA_DQ_STAT_VOLATILE 0x02
99 #define LDPAA_DQ_STAT_EXPIRED 0x01
100 uint32_t ldpaa_dq_flags(const struct ldpaa_dq *);
101 static inline int ldpaa_dq_is_pull(const struct ldpaa_dq *dq)
103 return (int)(ldpaa_dq_flags(dq) & LDPAA_DQ_STAT_VOLATILE);
105 static inline int ldpaa_dq_is_pull_complete(
106 const struct ldpaa_dq *dq)
108 return (int)(ldpaa_dq_flags(dq) & LDPAA_DQ_STAT_EXPIRED);
110 /* seqnum/odpid are valid only if VALIDFRAME and ODPVALID flags are TRUE */
111 uint16_t ldpaa_dq_seqnum(const struct ldpaa_dq *);
112 uint16_t ldpaa_dq_odpid(const struct ldpaa_dq *);
113 uint32_t ldpaa_dq_fqid(const struct ldpaa_dq *);
114 uint32_t ldpaa_dq_byte_count(const struct ldpaa_dq *);
115 uint32_t ldpaa_dq_frame_count(const struct ldpaa_dq *);
116 uint32_t ldpaa_dq_fqd_ctx_hi(const struct ldpaa_dq *);
117 uint32_t ldpaa_dq_fqd_ctx_lo(const struct ldpaa_dq *);
118 /* get the Frame Descriptor */
119 const struct dpaa_fd *ldpaa_dq_fd(const struct ldpaa_dq *);
121 #endif /* __FSL_DPAA_FD_H */