diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/exp_rcv.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/exp_rcv.h b/drivers/infiniband/hw/hfi1/exp_rcv.h new file mode 100644 index 000000000..c6291bbf7 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/exp_rcv.h @@ -0,0 +1,170 @@ +/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ +/* + * Copyright(c) 2017 Intel Corporation. + */ + +#ifndef _HFI1_EXP_RCV_H +#define _HFI1_EXP_RCV_H +#include "hfi.h" + +#define EXP_TID_SET_EMPTY(set) (set.count == 0 && list_empty(&set.list)) + +#define EXP_TID_TIDLEN_MASK 0x7FFULL +#define EXP_TID_TIDLEN_SHIFT 0 +#define EXP_TID_TIDCTRL_MASK 0x3ULL +#define EXP_TID_TIDCTRL_SHIFT 20 +#define EXP_TID_TIDIDX_MASK 0x3FFULL +#define EXP_TID_TIDIDX_SHIFT 22 +#define EXP_TID_GET(tid, field) \ + (((tid) >> EXP_TID_TID##field##_SHIFT) & EXP_TID_TID##field##_MASK) + +#define EXP_TID_SET(field, value) \ + (((value) & EXP_TID_TID##field##_MASK) << \ + EXP_TID_TID##field##_SHIFT) +#define EXP_TID_CLEAR(tid, field) ({ \ + (tid) &= ~(EXP_TID_TID##field##_MASK << \ + EXP_TID_TID##field##_SHIFT); \ + }) +#define EXP_TID_RESET(tid, field, value) do { \ + EXP_TID_CLEAR(tid, field); \ + (tid) |= EXP_TID_SET(field, (value)); \ + } while (0) + +/* + * Define fields in the KDETH header so we can update the header + * template. + */ +#define KDETH_OFFSET_SHIFT 0 +#define KDETH_OFFSET_MASK 0x7fff +#define KDETH_OM_SHIFT 15 +#define KDETH_OM_MASK 0x1 +#define KDETH_TID_SHIFT 16 +#define KDETH_TID_MASK 0x3ff +#define KDETH_TIDCTRL_SHIFT 26 +#define KDETH_TIDCTRL_MASK 0x3 +#define KDETH_INTR_SHIFT 28 +#define KDETH_INTR_MASK 0x1 +#define KDETH_SH_SHIFT 29 +#define KDETH_SH_MASK 0x1 +#define KDETH_KVER_SHIFT 30 +#define KDETH_KVER_MASK 0x3 +#define KDETH_JKEY_SHIFT 0x0 +#define KDETH_JKEY_MASK 0xff +#define KDETH_HCRC_UPPER_SHIFT 16 +#define KDETH_HCRC_UPPER_MASK 0xff +#define KDETH_HCRC_LOWER_SHIFT 24 +#define KDETH_HCRC_LOWER_MASK 0xff + +#define KDETH_GET(val, field) \ + (((le32_to_cpu((val))) >> KDETH_##field##_SHIFT) & KDETH_##field##_MASK) +#define KDETH_SET(dw, field, val) do { \ + u32 dwval = le32_to_cpu(dw); \ + dwval &= ~(KDETH_##field##_MASK << KDETH_##field##_SHIFT); \ + dwval |= (((val) & KDETH_##field##_MASK) << \ + KDETH_##field##_SHIFT); \ + dw = cpu_to_le32(dwval); \ + } while (0) + +#define KDETH_RESET(dw, field, val) ({ dw = 0; KDETH_SET(dw, field, val); }) + +/* KDETH OM multipliers and switch over point */ +#define KDETH_OM_SMALL 4 +#define KDETH_OM_SMALL_SHIFT 2 +#define KDETH_OM_LARGE 64 +#define KDETH_OM_LARGE_SHIFT 6 +#define KDETH_OM_MAX_SIZE (1 << ((KDETH_OM_LARGE / KDETH_OM_SMALL) + 1)) + +struct tid_group { + struct list_head list; + u32 base; + u8 size; + u8 used; + u8 map; +}; + +/* + * Write an "empty" RcvArray entry. + * This function exists so the TID registaration code can use it + * to write to unused/unneeded entries and still take advantage + * of the WC performance improvements. The HFI will ignore this + * write to the RcvArray entry. + */ +static inline void rcv_array_wc_fill(struct hfi1_devdata *dd, u32 index) +{ + /* + * Doing the WC fill writes only makes sense if the device is + * present and the RcvArray has been mapped as WC memory. + */ + if ((dd->flags & HFI1_PRESENT) && dd->rcvarray_wc) { + writeq(0, dd->rcvarray_wc + (index * 8)); + if ((index & 3) == 3) + flush_wc(); + } +} + +static inline void tid_group_add_tail(struct tid_group *grp, + struct exp_tid_set *set) +{ + list_add_tail(&grp->list, &set->list); + set->count++; +} + +static inline void tid_group_remove(struct tid_group *grp, + struct exp_tid_set *set) +{ + list_del_init(&grp->list); + set->count--; +} + +static inline void tid_group_move(struct tid_group *group, + struct exp_tid_set *s1, + struct exp_tid_set *s2) +{ + tid_group_remove(group, s1); + tid_group_add_tail(group, s2); +} + +static inline struct tid_group *tid_group_pop(struct exp_tid_set *set) +{ + struct tid_group *grp = + list_first_entry(&set->list, struct tid_group, list); + list_del_init(&grp->list); + set->count--; + return grp; +} + +static inline u32 rcventry2tidinfo(u32 rcventry) +{ + u32 pair = rcventry & ~0x1; + + return EXP_TID_SET(IDX, pair >> 1) | + EXP_TID_SET(CTRL, 1 << (rcventry - pair)); +} + +/** + * hfi1_tid_group_to_idx - convert an index to a group + * @rcd - the receive context + * @grp - the group pointer + */ +static inline u16 +hfi1_tid_group_to_idx(struct hfi1_ctxtdata *rcd, struct tid_group *grp) +{ + return grp - &rcd->groups[0]; +} + +/** + * hfi1_idx_to_tid_group - convert a group to an index + * @rcd - the receive context + * @idx - the index + */ +static inline struct tid_group * +hfi1_idx_to_tid_group(struct hfi1_ctxtdata *rcd, u16 idx) +{ + return &rcd->groups[idx]; +} + +int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd); +void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd); +void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd); + +#endif /* _HFI1_EXP_RCV_H */ |