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   1 From 72a6312eda9b142ac5910e5f4b652fa8ae8d222d Mon Sep 17 00:00:00 2001
   2 From: Roy Pledge <roy.pledge@nxp.com>
   3 Date: Thu, 25 Oct 2018 16:55:53 -0400
   4 Subject: [PATCH] soc: fsl: dpio: Fix order restoration API for QBMan 5.0
   5
   6 The mechanism for indicating to HW that a frame was dropped
   7 when performing HW order restoration changed in QBMan 5.0 to
   8 use a management command instead of a special enqueue command.
   9 This patch implements that change when running on a QBMan 5.0
  10 and above device.
  11
  12 Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
  13 ---
  14  drivers/soc/fsl/dpio/dpio-service.c | 10 +++++++
  15  drivers/soc/fsl/dpio/qbman-portal.c | 59 ++++++++++++++++++++++++++++++++-----
  16  drivers/soc/fsl/dpio/qbman-portal.h |  9 ++++++
  17  3 files changed, 71 insertions(+), 7 deletions(-)
  18
  19 --- a/drivers/soc/fsl/dpio/dpio-service.c
  20 +++ b/drivers/soc/fsl/dpio/dpio-service.c
  21 @@ -803,10 +803,20 @@ int dpaa2_io_service_orp_seqnum_drop(str
  22  {
  23         struct qbman_eq_desc ed;
  24         struct dpaa2_fd fd;
  25 +       unsigned long irqflags;
  26 +       int ret;
  27
  28         d = service_select(d);
  29         if (!d)
  30                 return -ENODEV;
  31 +
  32 +       if ((d->swp->desc->qman_version & QMAN_REV_MASK) >= QMAN_REV_5000) {
  33 +               spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags);
  34 +               ret = qbman_orp_drop(d->swp, orpid, seqnum);
  35 +               spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags);
  36 +               return ret;
  37 +       }
  38 +
  39         qbman_eq_desc_clear(&ed);
  40         qbman_eq_desc_set_orp_hole(&ed, orpid, seqnum);
  41         return qbman_swp_enqueue(d->swp, &ed, &fd);
  42 --- a/drivers/soc/fsl/dpio/qbman-portal.c
  43 +++ b/drivers/soc/fsl/dpio/qbman-portal.c
  44 @@ -12,19 +12,13 @@
  45
  46  #include "qbman-portal.h"
  47
  48 -#define QMAN_REV_4000   0x04000000
  49 -#define QMAN_REV_4100   0x04010000
  50 -#define QMAN_REV_4101   0x04010001
  51 -#define QMAN_REV_5000   0x05000000
  52 -
  53 -#define QMAN_REV_MASK   0xffff0000
  54 -
  55  /* All QBMan command and result structures use this "valid bit" encoding */
  56  #define QB_VALID_BIT ((u32)0x80)
  57
  58  /* QBMan portal management command codes */
  59  #define QBMAN_MC_ACQUIRE       0x30
  60  #define QBMAN_WQCHAN_CONFIGURE 0x46
  61 +#define QBMAN_MC_ORP           0x63
  62
  63  /* CINH register offsets */
  64  #define QBMAN_CINH_SWP_EQCR_PI      0x800
  65 @@ -1246,3 +1240,54 @@ u32 qbman_bp_info_num_free_bufs(struct q
  66  {
  67         return le32_to_cpu(a->fill);
  68  }
  69 +
  70 +struct qbman_orp_cmd_desc {
  71 +       u8 verb;
  72 +       u8 reserved;
  73 +       u8 cid;
  74 +       u8 reserved2;
  75 +       u16 orpid;
  76 +       u16 seqnum;
  77 +       u8 reserved3[56];
  78 +};
  79 +
  80 +struct qbman_orp_cmd_rslt {
  81 +       u8 verb;
  82 +       u8 rslt;
  83 +       u8 cid;
  84 +       u8 reserved1[61];
  85 +};
  86 +
  87 +int qbman_orp_drop(struct qbman_swp *s, u16 orpid, u16 seqnum)
  88 +{
  89 +       struct qbman_orp_cmd_desc *p;
  90 +       struct qbman_orp_cmd_rslt *r;
  91 +       void *resp;
  92 +
  93 +       p = (struct qbman_orp_cmd_desc *)qbman_swp_mc_start(s);
  94 +       if (!p)
  95 +               return -EBUSY;
  96 +
  97 +       p->cid = 0x7;
  98 +       p->orpid = cpu_to_le16(orpid);
  99 +       p->seqnum = cpu_to_le16(seqnum);
 100 +
 101 +       resp = qbman_swp_mc_complete(s, p, QBMAN_MC_ORP);
 102 +       if (!resp) {
 103 +               pr_err("qbman: Drop sequence num %d orpid 0x%x failed, no response\n",
 104 +                      seqnum, orpid);
 105 +               return -EIO;
 106 +       }
 107 +       r = (struct qbman_orp_cmd_rslt *)resp;
 108 +       /* Decode the outcome */
 109 +       WARN_ON((r->verb & QBMAN_RESPONSE_VERB_MASK) != QBMAN_MC_ORP);
 110 +
 111 +       /* Determine success or failure */
 112 +       if (r->rslt != QBMAN_MC_RSLT_OK) {
 113 +               pr_err("Drop seqnum %d of prpid 0x%x failed, code=0x%02x\n",
 114 +                      seqnum, orpid, r->rslt);
 115 +               return -EIO;
 116 +       }
 117 +
 118 +       return 0;
 119 +}
 120 --- a/drivers/soc/fsl/dpio/qbman-portal.h
 121 +++ b/drivers/soc/fsl/dpio/qbman-portal.h
 122 @@ -9,6 +9,13 @@
 123
 124  #include <soc/fsl/dpaa2-fd.h>
 125
 126 +#define QMAN_REV_4000   0x04000000
 127 +#define QMAN_REV_4100   0x04010000
 128 +#define QMAN_REV_4101   0x04010001
 129 +#define QMAN_REV_5000   0x05000000
 130 +
 131 +#define QMAN_REV_MASK   0xffff0000
 132 +
 133  struct dpaa2_dq;
 134  struct qbman_swp;
 135
 136 @@ -178,6 +185,8 @@ void qbman_eq_desc_set_qd(struct qbman_e
 137  int qbman_swp_enqueue(struct qbman_swp *p, const struct qbman_eq_desc *d,
 138                       const struct dpaa2_fd *fd);
 139
 140 +int qbman_orp_drop(struct qbman_swp *s, u16 orpid, u16 seqnum);
 141 +
 142  void qbman_release_desc_clear(struct qbman_release_desc *d);
 143  void qbman_release_desc_set_bpid(struct qbman_release_desc *d, u16 bpid);
 144  void qbman_release_desc_set_rcdi(struct qbman_release_desc *d, int enable);