include/fsl-mc/fsl_dpaa_fd.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2014 Freescale Semiconductor
   4  */
   5 #ifndef __FSL_DPAA_FD_H
   6 #define __FSL_DPAA_FD_H
   7
   8 /* Place-holder for FDs, we represent it via the simplest form that we need for
   9  * now. Different overlays may be needed to support different options, etc. (It
  10  * is impractical to define One True Struct, because the resulting encoding
  11  * routines (lots of read-modify-writes) would be worst-case performance whether
  12  * or not circumstances required them.) */
  13 struct dpaa_fd {
  14         union {
  15                 u32 words[8];
  16                 struct dpaa_fd_simple {
  17                         u32 addr_lo;
  18                         u32 addr_hi;
  19                         u32 len;
  20                         /* offset in the MS 16 bits, BPID in the LS 16 bits */
  21                         u32 bpid_offset;
  22                         u32 frc; /* frame context */
  23                         /* "err", "va", "cbmt", "asal", [...] */
  24                         u32 ctrl;
  25                         /* flow context */
  26                         u32 flc_lo;
  27                         u32 flc_hi;
  28                 } simple;
  29         };
  30 };
  31
  32 enum dpaa_fd_format {
  33         dpaa_fd_single = 0,
  34         dpaa_fd_list,
  35         dpaa_fd_sg
  36 };
  37
  38 static inline u64 ldpaa_fd_get_addr(const struct dpaa_fd *fd)
  39 {
  40         return (u64)((((uint64_t)fd->simple.addr_hi) << 32)
  41                                 + fd->simple.addr_lo);
  42 }
  43
  44 static inline void ldpaa_fd_set_addr(struct dpaa_fd *fd, u64 addr)
  45 {
  46         fd->simple.addr_hi = upper_32_bits(addr);
  47         fd->simple.addr_lo = lower_32_bits(addr);
  48 }
  49
  50 static inline u32 ldpaa_fd_get_len(const struct dpaa_fd *fd)
  51 {
  52         return fd->simple.len;
  53 }
  54
  55 static inline void ldpaa_fd_set_len(struct dpaa_fd *fd, u32 len)
  56 {
  57         fd->simple.len = len;
  58 }
  59
  60 static inline uint16_t ldpaa_fd_get_offset(const struct dpaa_fd *fd)
  61 {
  62         return (uint16_t)(fd->simple.bpid_offset >> 16) & 0x0FFF;
  63 }
  64
  65 static inline void ldpaa_fd_set_offset(struct dpaa_fd *fd, uint16_t offset)
  66 {
  67         fd->simple.bpid_offset &= 0xF000FFFF;
  68         fd->simple.bpid_offset |= (u32)offset << 16;
  69 }
  70
  71 static inline uint16_t ldpaa_fd_get_bpid(const struct dpaa_fd *fd)
  72 {
  73         return (uint16_t)(fd->simple.bpid_offset & 0xFFFF);
  74 }
  75
  76 static inline void ldpaa_fd_set_bpid(struct dpaa_fd *fd, uint16_t bpid)
  77 {
  78         fd->simple.bpid_offset &= 0xFFFF0000;
  79         fd->simple.bpid_offset |= (u32)bpid;
  80 }
  81
  82 /* When frames are dequeued, the FDs show up inside "dequeue" result structures
  83  * (if at all, not all dequeue results contain valid FDs). This structure type
  84  * is intentionally defined without internal detail, and the only reason it
  85  * isn't declared opaquely (without size) is to allow the user to provide
  86  * suitably-sized (and aligned) memory for these entries. */
  87 struct ldpaa_dq {
  88         uint32_t dont_manipulate_directly[16];
  89 };
  90
  91 /* Parsing frame dequeue results */
  92 #define LDPAA_DQ_STAT_FQEMPTY       0x80
  93 #define LDPAA_DQ_STAT_HELDACTIVE    0x40
  94 #define LDPAA_DQ_STAT_FORCEELIGIBLE 0x20
  95 #define LDPAA_DQ_STAT_VALIDFRAME    0x10
  96 #define LDPAA_DQ_STAT_ODPVALID      0x04
  97 #define LDPAA_DQ_STAT_VOLATILE      0x02
  98 #define LDPAA_DQ_STAT_EXPIRED       0x01
  99 uint32_t ldpaa_dq_flags(const struct ldpaa_dq *);
 100 static inline int ldpaa_dq_is_pull(const struct ldpaa_dq *dq)
 101 {
 102         return (int)(ldpaa_dq_flags(dq) & LDPAA_DQ_STAT_VOLATILE);
 103 }
 104 static inline int ldpaa_dq_is_pull_complete(
 105                                         const struct ldpaa_dq *dq)
 106 {
 107         return (int)(ldpaa_dq_flags(dq) & LDPAA_DQ_STAT_EXPIRED);
 108 }
 109 /* seqnum/odpid are valid only if VALIDFRAME and ODPVALID flags are TRUE */
 110 uint16_t ldpaa_dq_seqnum(const struct ldpaa_dq *);
 111 uint16_t ldpaa_dq_odpid(const struct ldpaa_dq *);
 112 uint32_t ldpaa_dq_fqid(const struct ldpaa_dq *);
 113 uint32_t ldpaa_dq_byte_count(const struct ldpaa_dq *);
 114 uint32_t ldpaa_dq_frame_count(const struct ldpaa_dq *);
 115 uint32_t ldpaa_dq_fqd_ctx_hi(const struct ldpaa_dq *);
 116 uint32_t ldpaa_dq_fqd_ctx_lo(const struct ldpaa_dq *);
 117 /* get the Frame Descriptor */
 118 const struct dpaa_fd *ldpaa_dq_fd(const struct ldpaa_dq *);
 119
 120 #endif /* __FSL_DPAA_FD_H */