diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/irdma/uk.c | 1666 |
1 files changed, 1666 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/irdma/uk.c b/drivers/infiniband/hw/irdma/uk.c new file mode 100644 index 000000000..280d633d4 --- /dev/null +++ b/drivers/infiniband/hw/irdma/uk.c @@ -0,0 +1,1666 @@ +// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB +/* Copyright (c) 2015 - 2021 Intel Corporation */ +#include "osdep.h" +#include "defs.h" +#include "user.h" +#include "irdma.h" + +/** + * irdma_set_fragment - set fragment in wqe + * @wqe: wqe for setting fragment + * @offset: offset value + * @sge: sge length and stag + * @valid: The wqe valid + */ +static void irdma_set_fragment(__le64 *wqe, u32 offset, struct ib_sge *sge, + u8 valid) +{ + if (sge) { + set_64bit_val(wqe, offset, + FIELD_PREP(IRDMAQPSQ_FRAG_TO, sge->addr)); + set_64bit_val(wqe, offset + 8, + FIELD_PREP(IRDMAQPSQ_VALID, valid) | + FIELD_PREP(IRDMAQPSQ_FRAG_LEN, sge->length) | + FIELD_PREP(IRDMAQPSQ_FRAG_STAG, sge->lkey)); + } else { + set_64bit_val(wqe, offset, 0); + set_64bit_val(wqe, offset + 8, + FIELD_PREP(IRDMAQPSQ_VALID, valid)); + } +} + +/** + * irdma_set_fragment_gen_1 - set fragment in wqe + * @wqe: wqe for setting fragment + * @offset: offset value + * @sge: sge length and stag + * @valid: wqe valid flag + */ +static void irdma_set_fragment_gen_1(__le64 *wqe, u32 offset, + struct ib_sge *sge, u8 valid) +{ + if (sge) { + set_64bit_val(wqe, offset, + FIELD_PREP(IRDMAQPSQ_FRAG_TO, sge->addr)); + set_64bit_val(wqe, offset + 8, + FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_LEN, sge->length) | + FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_STAG, sge->lkey)); + } else { + set_64bit_val(wqe, offset, 0); + set_64bit_val(wqe, offset + 8, 0); + } +} + +/** + * irdma_nop_1 - insert a NOP wqe + * @qp: hw qp ptr + */ +static int irdma_nop_1(struct irdma_qp_uk *qp) +{ + u64 hdr; + __le64 *wqe; + u32 wqe_idx; + bool signaled = false; + + if (!qp->sq_ring.head) + return -EINVAL; + + wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring); + wqe = qp->sq_base[wqe_idx].elem; + + qp->sq_wrtrk_array[wqe_idx].quanta = IRDMA_QP_WQE_MIN_QUANTA; + + set_64bit_val(wqe, 0, 0); + set_64bit_val(wqe, 8, 0); + set_64bit_val(wqe, 16, 0); + + hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMAQP_OP_NOP) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + /* make sure WQE is written before valid bit is set */ + dma_wmb(); + + set_64bit_val(wqe, 24, hdr); + + return 0; +} + +/** + * irdma_clr_wqes - clear next 128 sq entries + * @qp: hw qp ptr + * @qp_wqe_idx: wqe_idx + */ +void irdma_clr_wqes(struct irdma_qp_uk *qp, u32 qp_wqe_idx) +{ + struct irdma_qp_quanta *sq; + u32 wqe_idx; + + if (!(qp_wqe_idx & 0x7F)) { + wqe_idx = (qp_wqe_idx + 128) % qp->sq_ring.size; + sq = qp->sq_base + wqe_idx; + if (wqe_idx) + memset(sq, qp->swqe_polarity ? 0 : 0xFF, + 128 * sizeof(*sq)); + else + memset(sq, qp->swqe_polarity ? 0xFF : 0, + 128 * sizeof(*sq)); + } +} + +/** + * irdma_uk_qp_post_wr - ring doorbell + * @qp: hw qp ptr + */ +void irdma_uk_qp_post_wr(struct irdma_qp_uk *qp) +{ + u64 temp; + u32 hw_sq_tail; + u32 sw_sq_head; + + /* valid bit is written and loads completed before reading shadow */ + mb(); + + /* read the doorbell shadow area */ + get_64bit_val(qp->shadow_area, 0, &temp); + + hw_sq_tail = (u32)FIELD_GET(IRDMA_QP_DBSA_HW_SQ_TAIL, temp); + sw_sq_head = IRDMA_RING_CURRENT_HEAD(qp->sq_ring); + if (sw_sq_head != qp->initial_ring.head) { + if (qp->push_dropped) { + writel(qp->qp_id, qp->wqe_alloc_db); + qp->push_dropped = false; + } else if (sw_sq_head != hw_sq_tail) { + if (sw_sq_head > qp->initial_ring.head) { + if (hw_sq_tail >= qp->initial_ring.head && + hw_sq_tail < sw_sq_head) + writel(qp->qp_id, qp->wqe_alloc_db); + } else { + if (hw_sq_tail >= qp->initial_ring.head || + hw_sq_tail < sw_sq_head) + writel(qp->qp_id, qp->wqe_alloc_db); + } + } + } + + qp->initial_ring.head = qp->sq_ring.head; +} + +/** + * irdma_qp_ring_push_db - ring qp doorbell + * @qp: hw qp ptr + * @wqe_idx: wqe index + */ +static void irdma_qp_ring_push_db(struct irdma_qp_uk *qp, u32 wqe_idx) +{ + set_32bit_val(qp->push_db, 0, + FIELD_PREP(IRDMA_WQEALLOC_WQE_DESC_INDEX, wqe_idx >> 3) | qp->qp_id); + qp->initial_ring.head = qp->sq_ring.head; + qp->push_mode = true; + qp->push_dropped = false; +} + +void irdma_qp_push_wqe(struct irdma_qp_uk *qp, __le64 *wqe, u16 quanta, + u32 wqe_idx, bool post_sq) +{ + __le64 *push; + + if (IRDMA_RING_CURRENT_HEAD(qp->initial_ring) != + IRDMA_RING_CURRENT_TAIL(qp->sq_ring) && + !qp->push_mode) { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } else { + push = (__le64 *)((uintptr_t)qp->push_wqe + + (wqe_idx & 0x7) * 0x20); + memcpy(push, wqe, quanta * IRDMA_QP_WQE_MIN_SIZE); + irdma_qp_ring_push_db(qp, wqe_idx); + } +} + +/** + * irdma_qp_get_next_send_wqe - pad with NOP if needed, return where next WR should go + * @qp: hw qp ptr + * @wqe_idx: return wqe index + * @quanta: size of WR in quanta + * @total_size: size of WR in bytes + * @info: info on WR + */ +__le64 *irdma_qp_get_next_send_wqe(struct irdma_qp_uk *qp, u32 *wqe_idx, + u16 quanta, u32 total_size, + struct irdma_post_sq_info *info) +{ + __le64 *wqe; + __le64 *wqe_0 = NULL; + u32 nop_wqe_idx; + u16 avail_quanta; + u16 i; + + avail_quanta = qp->uk_attrs->max_hw_sq_chunk - + (IRDMA_RING_CURRENT_HEAD(qp->sq_ring) % + qp->uk_attrs->max_hw_sq_chunk); + if (quanta <= avail_quanta) { + /* WR fits in current chunk */ + if (quanta > IRDMA_SQ_RING_FREE_QUANTA(qp->sq_ring)) + return NULL; + } else { + /* Need to pad with NOP */ + if (quanta + avail_quanta > + IRDMA_SQ_RING_FREE_QUANTA(qp->sq_ring)) + return NULL; + + nop_wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring); + for (i = 0; i < avail_quanta; i++) { + irdma_nop_1(qp); + IRDMA_RING_MOVE_HEAD_NOCHECK(qp->sq_ring); + } + if (qp->push_db && info->push_wqe) + irdma_qp_push_wqe(qp, qp->sq_base[nop_wqe_idx].elem, + avail_quanta, nop_wqe_idx, true); + } + + *wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring); + if (!*wqe_idx) + qp->swqe_polarity = !qp->swqe_polarity; + + IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->sq_ring, quanta); + + wqe = qp->sq_base[*wqe_idx].elem; + if (qp->uk_attrs->hw_rev == IRDMA_GEN_1 && quanta == 1 && + (IRDMA_RING_CURRENT_HEAD(qp->sq_ring) & 1)) { + wqe_0 = qp->sq_base[IRDMA_RING_CURRENT_HEAD(qp->sq_ring)].elem; + wqe_0[3] = cpu_to_le64(FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity ? 0 : 1)); + } + qp->sq_wrtrk_array[*wqe_idx].wrid = info->wr_id; + qp->sq_wrtrk_array[*wqe_idx].wr_len = total_size; + qp->sq_wrtrk_array[*wqe_idx].quanta = quanta; + + return wqe; +} + +/** + * irdma_qp_get_next_recv_wqe - get next qp's rcv wqe + * @qp: hw qp ptr + * @wqe_idx: return wqe index + */ +__le64 *irdma_qp_get_next_recv_wqe(struct irdma_qp_uk *qp, u32 *wqe_idx) +{ + __le64 *wqe; + int ret_code; + + if (IRDMA_RING_FULL_ERR(qp->rq_ring)) + return NULL; + + IRDMA_ATOMIC_RING_MOVE_HEAD(qp->rq_ring, *wqe_idx, ret_code); + if (ret_code) + return NULL; + + if (!*wqe_idx) + qp->rwqe_polarity = !qp->rwqe_polarity; + /* rq_wqe_size_multiplier is no of 32 byte quanta in one rq wqe */ + wqe = qp->rq_base[*wqe_idx * qp->rq_wqe_size_multiplier].elem; + + return wqe; +} + +/** + * irdma_uk_rdma_write - rdma write operation + * @qp: hw qp ptr + * @info: post sq information + * @post_sq: flag to post sq + */ +int irdma_uk_rdma_write(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info, + bool post_sq) +{ + u64 hdr; + __le64 *wqe; + struct irdma_rdma_write *op_info; + u32 i, wqe_idx; + u32 total_size = 0, byte_off; + int ret_code; + u32 frag_cnt, addl_frag_cnt; + bool read_fence = false; + u16 quanta; + + info->push_wqe = qp->push_db ? true : false; + + op_info = &info->op.rdma_write; + if (op_info->num_lo_sges > qp->max_sq_frag_cnt) + return -EINVAL; + + for (i = 0; i < op_info->num_lo_sges; i++) + total_size += op_info->lo_sg_list[i].length; + + read_fence |= info->read_fence; + + if (info->imm_data_valid) + frag_cnt = op_info->num_lo_sges + 1; + else + frag_cnt = op_info->num_lo_sges; + addl_frag_cnt = frag_cnt > 1 ? (frag_cnt - 1) : 0; + ret_code = irdma_fragcnt_to_quanta_sq(frag_cnt, &quanta); + if (ret_code) + return ret_code; + + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size, + info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + set_64bit_val(wqe, 16, + FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr)); + + if (info->imm_data_valid) { + set_64bit_val(wqe, 0, + FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data)); + i = 0; + } else { + qp->wqe_ops.iw_set_fragment(wqe, 0, + op_info->lo_sg_list, + qp->swqe_polarity); + i = 1; + } + + for (byte_off = 32; i < op_info->num_lo_sges; i++) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, + &op_info->lo_sg_list[i], + qp->swqe_polarity); + byte_off += 16; + } + + /* if not an odd number set valid bit in next fragment */ + if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(frag_cnt & 0x01) && + frag_cnt) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL, + qp->swqe_polarity); + if (qp->uk_attrs->hw_rev == IRDMA_GEN_2) + ++addl_frag_cnt; + } + + hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) | + FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) | + FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, info->imm_data_valid) | + FIELD_PREP(IRDMAQPSQ_REPORTRTT, info->report_rtt) | + FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) | + FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_uk_rdma_read - rdma read command + * @qp: hw qp ptr + * @info: post sq information + * @inv_stag: flag for inv_stag + * @post_sq: flag to post sq + */ +int irdma_uk_rdma_read(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info, + bool inv_stag, bool post_sq) +{ + struct irdma_rdma_read *op_info; + int ret_code; + u32 i, byte_off, total_size = 0; + bool local_fence = false; + u32 addl_frag_cnt; + __le64 *wqe; + u32 wqe_idx; + u16 quanta; + u64 hdr; + + info->push_wqe = qp->push_db ? true : false; + + op_info = &info->op.rdma_read; + if (qp->max_sq_frag_cnt < op_info->num_lo_sges) + return -EINVAL; + + for (i = 0; i < op_info->num_lo_sges; i++) + total_size += op_info->lo_sg_list[i].length; + + ret_code = irdma_fragcnt_to_quanta_sq(op_info->num_lo_sges, &quanta); + if (ret_code) + return ret_code; + + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size, + info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + addl_frag_cnt = op_info->num_lo_sges > 1 ? + (op_info->num_lo_sges - 1) : 0; + local_fence |= info->local_fence; + + qp->wqe_ops.iw_set_fragment(wqe, 0, op_info->lo_sg_list, + qp->swqe_polarity); + for (i = 1, byte_off = 32; i < op_info->num_lo_sges; ++i) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, + &op_info->lo_sg_list[i], + qp->swqe_polarity); + byte_off += 16; + } + + /* if not an odd number set valid bit in next fragment */ + if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && + !(op_info->num_lo_sges & 0x01) && op_info->num_lo_sges) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL, + qp->swqe_polarity); + if (qp->uk_attrs->hw_rev == IRDMA_GEN_2) + ++addl_frag_cnt; + } + set_64bit_val(wqe, 16, + FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr)); + hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) | + FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) | + FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) | + FIELD_PREP(IRDMAQPSQ_OPCODE, + (inv_stag ? IRDMAQP_OP_RDMA_READ_LOC_INV : IRDMAQP_OP_RDMA_READ)) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) | + FIELD_PREP(IRDMAQPSQ_READFENCE, info->read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_uk_send - rdma send command + * @qp: hw qp ptr + * @info: post sq information + * @post_sq: flag to post sq + */ +int irdma_uk_send(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info, + bool post_sq) +{ + __le64 *wqe; + struct irdma_post_send *op_info; + u64 hdr; + u32 i, wqe_idx, total_size = 0, byte_off; + int ret_code; + u32 frag_cnt, addl_frag_cnt; + bool read_fence = false; + u16 quanta; + + info->push_wqe = qp->push_db ? true : false; + + op_info = &info->op.send; + if (qp->max_sq_frag_cnt < op_info->num_sges) + return -EINVAL; + + for (i = 0; i < op_info->num_sges; i++) + total_size += op_info->sg_list[i].length; + + if (info->imm_data_valid) + frag_cnt = op_info->num_sges + 1; + else + frag_cnt = op_info->num_sges; + ret_code = irdma_fragcnt_to_quanta_sq(frag_cnt, &quanta); + if (ret_code) + return ret_code; + + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size, + info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + read_fence |= info->read_fence; + addl_frag_cnt = frag_cnt > 1 ? (frag_cnt - 1) : 0; + if (info->imm_data_valid) { + set_64bit_val(wqe, 0, + FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data)); + i = 0; + } else { + qp->wqe_ops.iw_set_fragment(wqe, 0, + frag_cnt ? op_info->sg_list : NULL, + qp->swqe_polarity); + i = 1; + } + + for (byte_off = 32; i < op_info->num_sges; i++) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, &op_info->sg_list[i], + qp->swqe_polarity); + byte_off += 16; + } + + /* if not an odd number set valid bit in next fragment */ + if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(frag_cnt & 0x01) && + frag_cnt) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL, + qp->swqe_polarity); + if (qp->uk_attrs->hw_rev == IRDMA_GEN_2) + ++addl_frag_cnt; + } + + set_64bit_val(wqe, 16, + FIELD_PREP(IRDMAQPSQ_DESTQKEY, op_info->qkey) | + FIELD_PREP(IRDMAQPSQ_DESTQPN, op_info->dest_qp)); + hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, info->stag_to_inv) | + FIELD_PREP(IRDMAQPSQ_AHID, op_info->ah_id) | + FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, + (info->imm_data_valid ? 1 : 0)) | + FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) | + FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) | + FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) | + FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_UDPHEADER, info->udp_hdr) | + FIELD_PREP(IRDMAQPSQ_L4LEN, info->l4len) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_set_mw_bind_wqe_gen_1 - set mw bind wqe + * @wqe: wqe for setting fragment + * @op_info: info for setting bind wqe values + */ +static void irdma_set_mw_bind_wqe_gen_1(__le64 *wqe, + struct irdma_bind_window *op_info) +{ + set_64bit_val(wqe, 0, (uintptr_t)op_info->va); + set_64bit_val(wqe, 8, + FIELD_PREP(IRDMAQPSQ_PARENTMRSTAG, op_info->mw_stag) | + FIELD_PREP(IRDMAQPSQ_MWSTAG, op_info->mr_stag)); + set_64bit_val(wqe, 16, op_info->bind_len); +} + +/** + * irdma_copy_inline_data_gen_1 - Copy inline data to wqe + * @wqe: pointer to wqe + * @sge_list: table of pointers to inline data + * @num_sges: Total inline data length + * @polarity: compatibility parameter + */ +static void irdma_copy_inline_data_gen_1(u8 *wqe, struct ib_sge *sge_list, + u32 num_sges, u8 polarity) +{ + u32 quanta_bytes_remaining = 16; + int i; + + for (i = 0; i < num_sges; i++) { + u8 *cur_sge = (u8 *)(uintptr_t)sge_list[i].addr; + u32 sge_len = sge_list[i].length; + + while (sge_len) { + u32 bytes_copied; + + bytes_copied = min(sge_len, quanta_bytes_remaining); + memcpy(wqe, cur_sge, bytes_copied); + wqe += bytes_copied; + cur_sge += bytes_copied; + quanta_bytes_remaining -= bytes_copied; + sge_len -= bytes_copied; + + if (!quanta_bytes_remaining) { + /* Remaining inline bytes reside after hdr */ + wqe += 16; + quanta_bytes_remaining = 32; + } + } + } +} + +/** + * irdma_inline_data_size_to_quanta_gen_1 - based on inline data, quanta + * @data_size: data size for inline + * + * Gets the quanta based on inline and immediate data. + */ +static inline u16 irdma_inline_data_size_to_quanta_gen_1(u32 data_size) +{ + return data_size <= 16 ? IRDMA_QP_WQE_MIN_QUANTA : 2; +} + +/** + * irdma_set_mw_bind_wqe - set mw bind in wqe + * @wqe: wqe for setting mw bind + * @op_info: info for setting wqe values + */ +static void irdma_set_mw_bind_wqe(__le64 *wqe, + struct irdma_bind_window *op_info) +{ + set_64bit_val(wqe, 0, (uintptr_t)op_info->va); + set_64bit_val(wqe, 8, + FIELD_PREP(IRDMAQPSQ_PARENTMRSTAG, op_info->mr_stag) | + FIELD_PREP(IRDMAQPSQ_MWSTAG, op_info->mw_stag)); + set_64bit_val(wqe, 16, op_info->bind_len); +} + +/** + * irdma_copy_inline_data - Copy inline data to wqe + * @wqe: pointer to wqe + * @sge_list: table of pointers to inline data + * @num_sges: number of SGE's + * @polarity: polarity of wqe valid bit + */ +static void irdma_copy_inline_data(u8 *wqe, struct ib_sge *sge_list, + u32 num_sges, u8 polarity) +{ + u8 inline_valid = polarity << IRDMA_INLINE_VALID_S; + u32 quanta_bytes_remaining = 8; + bool first_quanta = true; + int i; + + wqe += 8; + + for (i = 0; i < num_sges; i++) { + u8 *cur_sge = (u8 *)(uintptr_t)sge_list[i].addr; + u32 sge_len = sge_list[i].length; + + while (sge_len) { + u32 bytes_copied; + + bytes_copied = min(sge_len, quanta_bytes_remaining); + memcpy(wqe, cur_sge, bytes_copied); + wqe += bytes_copied; + cur_sge += bytes_copied; + quanta_bytes_remaining -= bytes_copied; + sge_len -= bytes_copied; + + if (!quanta_bytes_remaining) { + quanta_bytes_remaining = 31; + + /* Remaining inline bytes reside after hdr */ + if (first_quanta) { + first_quanta = false; + wqe += 16; + } else { + *wqe = inline_valid; + wqe++; + } + } + } + } + if (!first_quanta && quanta_bytes_remaining < 31) + *(wqe + quanta_bytes_remaining) = inline_valid; +} + +/** + * irdma_inline_data_size_to_quanta - based on inline data, quanta + * @data_size: data size for inline + * + * Gets the quanta based on inline and immediate data. + */ +static u16 irdma_inline_data_size_to_quanta(u32 data_size) +{ + if (data_size <= 8) + return IRDMA_QP_WQE_MIN_QUANTA; + else if (data_size <= 39) + return 2; + else if (data_size <= 70) + return 3; + else if (data_size <= 101) + return 4; + else if (data_size <= 132) + return 5; + else if (data_size <= 163) + return 6; + else if (data_size <= 194) + return 7; + else + return 8; +} + +/** + * irdma_uk_inline_rdma_write - inline rdma write operation + * @qp: hw qp ptr + * @info: post sq information + * @post_sq: flag to post sq + */ +int irdma_uk_inline_rdma_write(struct irdma_qp_uk *qp, + struct irdma_post_sq_info *info, bool post_sq) +{ + __le64 *wqe; + struct irdma_rdma_write *op_info; + u64 hdr = 0; + u32 wqe_idx; + bool read_fence = false; + u32 i, total_size = 0; + u16 quanta; + + info->push_wqe = qp->push_db ? true : false; + op_info = &info->op.rdma_write; + + if (unlikely(qp->max_sq_frag_cnt < op_info->num_lo_sges)) + return -EINVAL; + + for (i = 0; i < op_info->num_lo_sges; i++) + total_size += op_info->lo_sg_list[i].length; + + if (unlikely(total_size > qp->max_inline_data)) + return -EINVAL; + + quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(total_size); + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size, + info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + read_fence |= info->read_fence; + set_64bit_val(wqe, 16, + FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr)); + + hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) | + FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) | + FIELD_PREP(IRDMAQPSQ_INLINEDATALEN, total_size) | + FIELD_PREP(IRDMAQPSQ_REPORTRTT, info->report_rtt ? 1 : 0) | + FIELD_PREP(IRDMAQPSQ_INLINEDATAFLAG, 1) | + FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, info->imm_data_valid ? 1 : 0) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe ? 1 : 0) | + FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + if (info->imm_data_valid) + set_64bit_val(wqe, 0, + FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data)); + + qp->wqe_ops.iw_copy_inline_data((u8 *)wqe, op_info->lo_sg_list, + op_info->num_lo_sges, + qp->swqe_polarity); + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_uk_inline_send - inline send operation + * @qp: hw qp ptr + * @info: post sq information + * @post_sq: flag to post sq + */ +int irdma_uk_inline_send(struct irdma_qp_uk *qp, + struct irdma_post_sq_info *info, bool post_sq) +{ + __le64 *wqe; + struct irdma_post_send *op_info; + u64 hdr; + u32 wqe_idx; + bool read_fence = false; + u32 i, total_size = 0; + u16 quanta; + + info->push_wqe = qp->push_db ? true : false; + op_info = &info->op.send; + + if (unlikely(qp->max_sq_frag_cnt < op_info->num_sges)) + return -EINVAL; + + for (i = 0; i < op_info->num_sges; i++) + total_size += op_info->sg_list[i].length; + + if (unlikely(total_size > qp->max_inline_data)) + return -EINVAL; + + quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(total_size); + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size, + info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + set_64bit_val(wqe, 16, + FIELD_PREP(IRDMAQPSQ_DESTQKEY, op_info->qkey) | + FIELD_PREP(IRDMAQPSQ_DESTQPN, op_info->dest_qp)); + + read_fence |= info->read_fence; + hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, info->stag_to_inv) | + FIELD_PREP(IRDMAQPSQ_AHID, op_info->ah_id) | + FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) | + FIELD_PREP(IRDMAQPSQ_INLINEDATALEN, total_size) | + FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, + (info->imm_data_valid ? 1 : 0)) | + FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) | + FIELD_PREP(IRDMAQPSQ_INLINEDATAFLAG, 1) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) | + FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_UDPHEADER, info->udp_hdr) | + FIELD_PREP(IRDMAQPSQ_L4LEN, info->l4len) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + if (info->imm_data_valid) + set_64bit_val(wqe, 0, + FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data)); + qp->wqe_ops.iw_copy_inline_data((u8 *)wqe, op_info->sg_list, + op_info->num_sges, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_uk_stag_local_invalidate - stag invalidate operation + * @qp: hw qp ptr + * @info: post sq information + * @post_sq: flag to post sq + */ +int irdma_uk_stag_local_invalidate(struct irdma_qp_uk *qp, + struct irdma_post_sq_info *info, + bool post_sq) +{ + __le64 *wqe; + struct irdma_inv_local_stag *op_info; + u64 hdr; + u32 wqe_idx; + bool local_fence = false; + struct ib_sge sge = {}; + + info->push_wqe = qp->push_db ? true : false; + op_info = &info->op.inv_local_stag; + local_fence = info->local_fence; + + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, IRDMA_QP_WQE_MIN_QUANTA, + 0, info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + sge.lkey = op_info->target_stag; + qp->wqe_ops.iw_set_fragment(wqe, 0, &sge, 0); + + set_64bit_val(wqe, 16, 0); + + hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMA_OP_TYPE_INV_STAG) | + FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) | + FIELD_PREP(IRDMAQPSQ_READFENCE, info->read_fence) | + FIELD_PREP(IRDMAQPSQ_LOCALFENCE, local_fence) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + + if (info->push_wqe) { + irdma_qp_push_wqe(qp, wqe, IRDMA_QP_WQE_MIN_QUANTA, wqe_idx, + post_sq); + } else { + if (post_sq) + irdma_uk_qp_post_wr(qp); + } + + return 0; +} + +/** + * irdma_uk_post_receive - post receive wqe + * @qp: hw qp ptr + * @info: post rq information + */ +int irdma_uk_post_receive(struct irdma_qp_uk *qp, + struct irdma_post_rq_info *info) +{ + u32 wqe_idx, i, byte_off; + u32 addl_frag_cnt; + __le64 *wqe; + u64 hdr; + + if (qp->max_rq_frag_cnt < info->num_sges) + return -EINVAL; + + wqe = irdma_qp_get_next_recv_wqe(qp, &wqe_idx); + if (!wqe) + return -ENOMEM; + + qp->rq_wrid_array[wqe_idx] = info->wr_id; + addl_frag_cnt = info->num_sges > 1 ? (info->num_sges - 1) : 0; + qp->wqe_ops.iw_set_fragment(wqe, 0, info->sg_list, + qp->rwqe_polarity); + + for (i = 1, byte_off = 32; i < info->num_sges; i++) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, &info->sg_list[i], + qp->rwqe_polarity); + byte_off += 16; + } + + /* if not an odd number set valid bit in next fragment */ + if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(info->num_sges & 0x01) && + info->num_sges) { + qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL, + qp->rwqe_polarity); + if (qp->uk_attrs->hw_rev == IRDMA_GEN_2) + ++addl_frag_cnt; + } + + set_64bit_val(wqe, 16, 0); + hdr = FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->rwqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + + return 0; +} + +/** + * irdma_uk_cq_resize - reset the cq buffer info + * @cq: cq to resize + * @cq_base: new cq buffer addr + * @cq_size: number of cqes + */ +void irdma_uk_cq_resize(struct irdma_cq_uk *cq, void *cq_base, int cq_size) +{ + cq->cq_base = cq_base; + cq->cq_size = cq_size; + IRDMA_RING_INIT(cq->cq_ring, cq->cq_size); + cq->polarity = 1; +} + +/** + * irdma_uk_cq_set_resized_cnt - record the count of the resized buffers + * @cq: cq to resize + * @cq_cnt: the count of the resized cq buffers + */ +void irdma_uk_cq_set_resized_cnt(struct irdma_cq_uk *cq, u16 cq_cnt) +{ + u64 temp_val; + u16 sw_cq_sel; + u8 arm_next_se; + u8 arm_next; + u8 arm_seq_num; + + get_64bit_val(cq->shadow_area, 32, &temp_val); + + sw_cq_sel = (u16)FIELD_GET(IRDMA_CQ_DBSA_SW_CQ_SELECT, temp_val); + sw_cq_sel += cq_cnt; + + arm_seq_num = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_SEQ_NUM, temp_val); + arm_next_se = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT_SE, temp_val); + arm_next = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT, temp_val); + + temp_val = FIELD_PREP(IRDMA_CQ_DBSA_ARM_SEQ_NUM, arm_seq_num) | + FIELD_PREP(IRDMA_CQ_DBSA_SW_CQ_SELECT, sw_cq_sel) | + FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT_SE, arm_next_se) | + FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT, arm_next); + + set_64bit_val(cq->shadow_area, 32, temp_val); +} + +/** + * irdma_uk_cq_request_notification - cq notification request (door bell) + * @cq: hw cq + * @cq_notify: notification type + */ +void irdma_uk_cq_request_notification(struct irdma_cq_uk *cq, + enum irdma_cmpl_notify cq_notify) +{ + u64 temp_val; + u16 sw_cq_sel; + u8 arm_next_se = 0; + u8 arm_next = 0; + u8 arm_seq_num; + + get_64bit_val(cq->shadow_area, 32, &temp_val); + arm_seq_num = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_SEQ_NUM, temp_val); + arm_seq_num++; + sw_cq_sel = (u16)FIELD_GET(IRDMA_CQ_DBSA_SW_CQ_SELECT, temp_val); + arm_next_se = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT_SE, temp_val); + arm_next_se |= 1; + if (cq_notify == IRDMA_CQ_COMPL_EVENT) + arm_next = 1; + temp_val = FIELD_PREP(IRDMA_CQ_DBSA_ARM_SEQ_NUM, arm_seq_num) | + FIELD_PREP(IRDMA_CQ_DBSA_SW_CQ_SELECT, sw_cq_sel) | + FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT_SE, arm_next_se) | + FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT, arm_next); + + set_64bit_val(cq->shadow_area, 32, temp_val); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + writel(cq->cq_id, cq->cqe_alloc_db); +} + +/** + * irdma_uk_cq_poll_cmpl - get cq completion info + * @cq: hw cq + * @info: cq poll information returned + */ +int irdma_uk_cq_poll_cmpl(struct irdma_cq_uk *cq, + struct irdma_cq_poll_info *info) +{ + u64 comp_ctx, qword0, qword2, qword3; + __le64 *cqe; + struct irdma_qp_uk *qp; + struct irdma_ring *pring = NULL; + u32 wqe_idx; + int ret_code; + bool move_cq_head = true; + u8 polarity; + bool ext_valid; + __le64 *ext_cqe; + + if (cq->avoid_mem_cflct) + cqe = IRDMA_GET_CURRENT_EXTENDED_CQ_ELEM(cq); + else + cqe = IRDMA_GET_CURRENT_CQ_ELEM(cq); + + get_64bit_val(cqe, 24, &qword3); + polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword3); + if (polarity != cq->polarity) + return -ENOENT; + + /* Ensure CQE contents are read after valid bit is checked */ + dma_rmb(); + + ext_valid = (bool)FIELD_GET(IRDMA_CQ_EXTCQE, qword3); + if (ext_valid) { + u64 qword6, qword7; + u32 peek_head; + + if (cq->avoid_mem_cflct) { + ext_cqe = (__le64 *)((u8 *)cqe + 32); + get_64bit_val(ext_cqe, 24, &qword7); + polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword7); + } else { + peek_head = (cq->cq_ring.head + 1) % cq->cq_ring.size; + ext_cqe = cq->cq_base[peek_head].buf; + get_64bit_val(ext_cqe, 24, &qword7); + polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword7); + if (!peek_head) + polarity ^= 1; + } + if (polarity != cq->polarity) + return -ENOENT; + + /* Ensure ext CQE contents are read after ext valid bit is checked */ + dma_rmb(); + + info->imm_valid = (bool)FIELD_GET(IRDMA_CQ_IMMVALID, qword7); + if (info->imm_valid) { + u64 qword4; + + get_64bit_val(ext_cqe, 0, &qword4); + info->imm_data = (u32)FIELD_GET(IRDMA_CQ_IMMDATALOW32, qword4); + } + info->ud_smac_valid = (bool)FIELD_GET(IRDMA_CQ_UDSMACVALID, qword7); + info->ud_vlan_valid = (bool)FIELD_GET(IRDMA_CQ_UDVLANVALID, qword7); + if (info->ud_smac_valid || info->ud_vlan_valid) { + get_64bit_val(ext_cqe, 16, &qword6); + if (info->ud_vlan_valid) + info->ud_vlan = (u16)FIELD_GET(IRDMA_CQ_UDVLAN, qword6); + if (info->ud_smac_valid) { + info->ud_smac[5] = qword6 & 0xFF; + info->ud_smac[4] = (qword6 >> 8) & 0xFF; + info->ud_smac[3] = (qword6 >> 16) & 0xFF; + info->ud_smac[2] = (qword6 >> 24) & 0xFF; + info->ud_smac[1] = (qword6 >> 32) & 0xFF; + info->ud_smac[0] = (qword6 >> 40) & 0xFF; + } + } + } else { + info->imm_valid = false; + info->ud_smac_valid = false; + info->ud_vlan_valid = false; + } + + info->q_type = (u8)FIELD_GET(IRDMA_CQ_SQ, qword3); + info->error = (bool)FIELD_GET(IRDMA_CQ_ERROR, qword3); + info->push_dropped = (bool)FIELD_GET(IRDMACQ_PSHDROP, qword3); + info->ipv4 = (bool)FIELD_GET(IRDMACQ_IPV4, qword3); + if (info->error) { + info->major_err = FIELD_GET(IRDMA_CQ_MAJERR, qword3); + info->minor_err = FIELD_GET(IRDMA_CQ_MINERR, qword3); + if (info->major_err == IRDMA_FLUSH_MAJOR_ERR) { + info->comp_status = IRDMA_COMPL_STATUS_FLUSHED; + /* Set the min error to standard flush error code for remaining cqes */ + if (info->minor_err != FLUSH_GENERAL_ERR) { + qword3 &= ~IRDMA_CQ_MINERR; + qword3 |= FIELD_PREP(IRDMA_CQ_MINERR, FLUSH_GENERAL_ERR); + set_64bit_val(cqe, 24, qword3); + } + } else { + info->comp_status = IRDMA_COMPL_STATUS_UNKNOWN; + } + } else { + info->comp_status = IRDMA_COMPL_STATUS_SUCCESS; + } + + get_64bit_val(cqe, 0, &qword0); + get_64bit_val(cqe, 16, &qword2); + + info->tcp_seq_num_rtt = (u32)FIELD_GET(IRDMACQ_TCPSEQNUMRTT, qword0); + info->qp_id = (u32)FIELD_GET(IRDMACQ_QPID, qword2); + info->ud_src_qpn = (u32)FIELD_GET(IRDMACQ_UDSRCQPN, qword2); + + get_64bit_val(cqe, 8, &comp_ctx); + + info->solicited_event = (bool)FIELD_GET(IRDMACQ_SOEVENT, qword3); + qp = (struct irdma_qp_uk *)(unsigned long)comp_ctx; + if (!qp || qp->destroy_pending) { + ret_code = -EFAULT; + goto exit; + } + wqe_idx = (u32)FIELD_GET(IRDMA_CQ_WQEIDX, qword3); + info->qp_handle = (irdma_qp_handle)(unsigned long)qp; + info->op_type = (u8)FIELD_GET(IRDMACQ_OP, qword3); + + if (info->q_type == IRDMA_CQE_QTYPE_RQ) { + u32 array_idx; + + array_idx = wqe_idx / qp->rq_wqe_size_multiplier; + + if (info->comp_status == IRDMA_COMPL_STATUS_FLUSHED || + info->comp_status == IRDMA_COMPL_STATUS_UNKNOWN) { + if (!IRDMA_RING_MORE_WORK(qp->rq_ring)) { + ret_code = -ENOENT; + goto exit; + } + + info->wr_id = qp->rq_wrid_array[qp->rq_ring.tail]; + array_idx = qp->rq_ring.tail; + } else { + info->wr_id = qp->rq_wrid_array[array_idx]; + } + + info->bytes_xfered = (u32)FIELD_GET(IRDMACQ_PAYLDLEN, qword0); + + if (qword3 & IRDMACQ_STAG) { + info->stag_invalid_set = true; + info->inv_stag = (u32)FIELD_GET(IRDMACQ_INVSTAG, qword2); + } else { + info->stag_invalid_set = false; + } + IRDMA_RING_SET_TAIL(qp->rq_ring, array_idx + 1); + if (info->comp_status == IRDMA_COMPL_STATUS_FLUSHED) { + qp->rq_flush_seen = true; + if (!IRDMA_RING_MORE_WORK(qp->rq_ring)) + qp->rq_flush_complete = true; + else + move_cq_head = false; + } + pring = &qp->rq_ring; + } else { /* q_type is IRDMA_CQE_QTYPE_SQ */ + if (qp->first_sq_wq) { + if (wqe_idx + 1 >= qp->conn_wqes) + qp->first_sq_wq = false; + + if (wqe_idx < qp->conn_wqes && qp->sq_ring.head == qp->sq_ring.tail) { + IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring); + IRDMA_RING_MOVE_TAIL(cq->cq_ring); + set_64bit_val(cq->shadow_area, 0, + IRDMA_RING_CURRENT_HEAD(cq->cq_ring)); + memset(info, 0, + sizeof(struct irdma_cq_poll_info)); + return irdma_uk_cq_poll_cmpl(cq, info); + } + } + /*cease posting push mode on push drop*/ + if (info->push_dropped) { + qp->push_mode = false; + qp->push_dropped = true; + } + if (info->comp_status != IRDMA_COMPL_STATUS_FLUSHED) { + info->wr_id = qp->sq_wrtrk_array[wqe_idx].wrid; + if (!info->comp_status) + info->bytes_xfered = qp->sq_wrtrk_array[wqe_idx].wr_len; + info->op_type = (u8)FIELD_GET(IRDMACQ_OP, qword3); + IRDMA_RING_SET_TAIL(qp->sq_ring, + wqe_idx + qp->sq_wrtrk_array[wqe_idx].quanta); + } else { + if (!IRDMA_RING_MORE_WORK(qp->sq_ring)) { + ret_code = -ENOENT; + goto exit; + } + + do { + __le64 *sw_wqe; + u64 wqe_qword; + u32 tail; + + tail = qp->sq_ring.tail; + sw_wqe = qp->sq_base[tail].elem; + get_64bit_val(sw_wqe, 24, + &wqe_qword); + info->op_type = (u8)FIELD_GET(IRDMAQPSQ_OPCODE, + wqe_qword); + IRDMA_RING_SET_TAIL(qp->sq_ring, + tail + qp->sq_wrtrk_array[tail].quanta); + if (info->op_type != IRDMAQP_OP_NOP) { + info->wr_id = qp->sq_wrtrk_array[tail].wrid; + info->bytes_xfered = qp->sq_wrtrk_array[tail].wr_len; + break; + } + } while (1); + if (info->op_type == IRDMA_OP_TYPE_BIND_MW && + info->minor_err == FLUSH_PROT_ERR) + info->minor_err = FLUSH_MW_BIND_ERR; + qp->sq_flush_seen = true; + if (!IRDMA_RING_MORE_WORK(qp->sq_ring)) + qp->sq_flush_complete = true; + } + pring = &qp->sq_ring; + } + + ret_code = 0; + +exit: + if (!ret_code && info->comp_status == IRDMA_COMPL_STATUS_FLUSHED) + if (pring && IRDMA_RING_MORE_WORK(*pring)) + move_cq_head = false; + + if (move_cq_head) { + IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring); + if (!IRDMA_RING_CURRENT_HEAD(cq->cq_ring)) + cq->polarity ^= 1; + + if (ext_valid && !cq->avoid_mem_cflct) { + IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring); + if (!IRDMA_RING_CURRENT_HEAD(cq->cq_ring)) + cq->polarity ^= 1; + } + + IRDMA_RING_MOVE_TAIL(cq->cq_ring); + if (!cq->avoid_mem_cflct && ext_valid) + IRDMA_RING_MOVE_TAIL(cq->cq_ring); + set_64bit_val(cq->shadow_area, 0, + IRDMA_RING_CURRENT_HEAD(cq->cq_ring)); + } else { + qword3 &= ~IRDMA_CQ_WQEIDX; + qword3 |= FIELD_PREP(IRDMA_CQ_WQEIDX, pring->tail); + set_64bit_val(cqe, 24, qword3); + } + + return ret_code; +} + +/** + * irdma_qp_round_up - return round up qp wq depth + * @wqdepth: wq depth in quanta to round up + */ +static int irdma_qp_round_up(u32 wqdepth) +{ + int scount = 1; + + for (wqdepth--; scount <= 16; scount *= 2) + wqdepth |= wqdepth >> scount; + + return ++wqdepth; +} + +/** + * irdma_get_wqe_shift - get shift count for maximum wqe size + * @uk_attrs: qp HW attributes + * @sge: Maximum Scatter Gather Elements wqe + * @inline_data: Maximum inline data size + * @shift: Returns the shift needed based on sge + * + * Shift can be used to left shift the wqe size based on number of SGEs and inlind data size. + * For 1 SGE or inline data <= 8, shift = 0 (wqe size of 32 + * bytes). For 2 or 3 SGEs or inline data <= 39, shift = 1 (wqe + * size of 64 bytes). + * For 4-7 SGE's and inline <= 101 Shift of 2 otherwise (wqe + * size of 256 bytes). + */ +void irdma_get_wqe_shift(struct irdma_uk_attrs *uk_attrs, u32 sge, + u32 inline_data, u8 *shift) +{ + *shift = 0; + if (uk_attrs->hw_rev >= IRDMA_GEN_2) { + if (sge > 1 || inline_data > 8) { + if (sge < 4 && inline_data <= 39) + *shift = 1; + else if (sge < 8 && inline_data <= 101) + *shift = 2; + else + *shift = 3; + } + } else if (sge > 1 || inline_data > 16) { + *shift = (sge < 4 && inline_data <= 48) ? 1 : 2; + } +} + +/* + * irdma_get_sqdepth - get SQ depth (quanta) + * @uk_attrs: qp HW attributes + * @sq_size: SQ size + * @shift: shift which determines size of WQE + * @sqdepth: depth of SQ + * + */ +int irdma_get_sqdepth(struct irdma_uk_attrs *uk_attrs, u32 sq_size, u8 shift, + u32 *sqdepth) +{ + *sqdepth = irdma_qp_round_up((sq_size << shift) + IRDMA_SQ_RSVD); + + if (*sqdepth < (IRDMA_QP_SW_MIN_WQSIZE << shift)) + *sqdepth = IRDMA_QP_SW_MIN_WQSIZE << shift; + else if (*sqdepth > uk_attrs->max_hw_wq_quanta) + return -EINVAL; + + return 0; +} + +/* + * irdma_get_rqdepth - get RQ depth (quanta) + * @uk_attrs: qp HW attributes + * @rq_size: RQ size + * @shift: shift which determines size of WQE + * @rqdepth: depth of RQ + */ +int irdma_get_rqdepth(struct irdma_uk_attrs *uk_attrs, u32 rq_size, u8 shift, + u32 *rqdepth) +{ + *rqdepth = irdma_qp_round_up((rq_size << shift) + IRDMA_RQ_RSVD); + + if (*rqdepth < (IRDMA_QP_SW_MIN_WQSIZE << shift)) + *rqdepth = IRDMA_QP_SW_MIN_WQSIZE << shift; + else if (*rqdepth > uk_attrs->max_hw_rq_quanta) + return -EINVAL; + + return 0; +} + +static const struct irdma_wqe_uk_ops iw_wqe_uk_ops = { + .iw_copy_inline_data = irdma_copy_inline_data, + .iw_inline_data_size_to_quanta = irdma_inline_data_size_to_quanta, + .iw_set_fragment = irdma_set_fragment, + .iw_set_mw_bind_wqe = irdma_set_mw_bind_wqe, +}; + +static const struct irdma_wqe_uk_ops iw_wqe_uk_ops_gen_1 = { + .iw_copy_inline_data = irdma_copy_inline_data_gen_1, + .iw_inline_data_size_to_quanta = irdma_inline_data_size_to_quanta_gen_1, + .iw_set_fragment = irdma_set_fragment_gen_1, + .iw_set_mw_bind_wqe = irdma_set_mw_bind_wqe_gen_1, +}; + +/** + * irdma_setup_connection_wqes - setup WQEs necessary to complete + * connection. + * @qp: hw qp (user and kernel) + * @info: qp initialization info + */ +static void irdma_setup_connection_wqes(struct irdma_qp_uk *qp, + struct irdma_qp_uk_init_info *info) +{ + u16 move_cnt = 1; + + if (!info->legacy_mode && + (qp->uk_attrs->feature_flags & IRDMA_FEATURE_RTS_AE)) + move_cnt = 3; + + qp->conn_wqes = move_cnt; + IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->sq_ring, move_cnt); + IRDMA_RING_MOVE_TAIL_BY_COUNT(qp->sq_ring, move_cnt); + IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->initial_ring, move_cnt); +} + +/** + * irdma_uk_qp_init - initialize shared qp + * @qp: hw qp (user and kernel) + * @info: qp initialization info + * + * initializes the vars used in both user and kernel mode. + * size of the wqe depends on numbers of max. fragements + * allowed. Then size of wqe * the number of wqes should be the + * amount of memory allocated for sq and rq. + */ +int irdma_uk_qp_init(struct irdma_qp_uk *qp, struct irdma_qp_uk_init_info *info) +{ + int ret_code = 0; + u32 sq_ring_size; + u8 sqshift, rqshift; + + qp->uk_attrs = info->uk_attrs; + if (info->max_sq_frag_cnt > qp->uk_attrs->max_hw_wq_frags || + info->max_rq_frag_cnt > qp->uk_attrs->max_hw_wq_frags) + return -EINVAL; + + irdma_get_wqe_shift(qp->uk_attrs, info->max_rq_frag_cnt, 0, &rqshift); + if (qp->uk_attrs->hw_rev == IRDMA_GEN_1) { + irdma_get_wqe_shift(qp->uk_attrs, info->max_sq_frag_cnt, + info->max_inline_data, &sqshift); + if (info->abi_ver > 4) + rqshift = IRDMA_MAX_RQ_WQE_SHIFT_GEN1; + } else { + irdma_get_wqe_shift(qp->uk_attrs, info->max_sq_frag_cnt + 1, + info->max_inline_data, &sqshift); + } + qp->qp_caps = info->qp_caps; + qp->sq_base = info->sq; + qp->rq_base = info->rq; + qp->qp_type = info->type ? info->type : IRDMA_QP_TYPE_IWARP; + qp->shadow_area = info->shadow_area; + qp->sq_wrtrk_array = info->sq_wrtrk_array; + + qp->rq_wrid_array = info->rq_wrid_array; + qp->wqe_alloc_db = info->wqe_alloc_db; + qp->qp_id = info->qp_id; + qp->sq_size = info->sq_size; + qp->push_mode = false; + qp->max_sq_frag_cnt = info->max_sq_frag_cnt; + sq_ring_size = qp->sq_size << sqshift; + IRDMA_RING_INIT(qp->sq_ring, sq_ring_size); + IRDMA_RING_INIT(qp->initial_ring, sq_ring_size); + if (info->first_sq_wq) { + irdma_setup_connection_wqes(qp, info); + qp->swqe_polarity = 1; + qp->first_sq_wq = true; + } else { + qp->swqe_polarity = 0; + } + qp->swqe_polarity_deferred = 1; + qp->rwqe_polarity = 0; + qp->rq_size = info->rq_size; + qp->max_rq_frag_cnt = info->max_rq_frag_cnt; + qp->max_inline_data = info->max_inline_data; + qp->rq_wqe_size = rqshift; + IRDMA_RING_INIT(qp->rq_ring, qp->rq_size); + qp->rq_wqe_size_multiplier = 1 << rqshift; + if (qp->uk_attrs->hw_rev == IRDMA_GEN_1) + qp->wqe_ops = iw_wqe_uk_ops_gen_1; + else + qp->wqe_ops = iw_wqe_uk_ops; + return ret_code; +} + +/** + * irdma_uk_cq_init - initialize shared cq (user and kernel) + * @cq: hw cq + * @info: hw cq initialization info + */ +void irdma_uk_cq_init(struct irdma_cq_uk *cq, + struct irdma_cq_uk_init_info *info) +{ + cq->cq_base = info->cq_base; + cq->cq_id = info->cq_id; + cq->cq_size = info->cq_size; + cq->cqe_alloc_db = info->cqe_alloc_db; + cq->cq_ack_db = info->cq_ack_db; + cq->shadow_area = info->shadow_area; + cq->avoid_mem_cflct = info->avoid_mem_cflct; + IRDMA_RING_INIT(cq->cq_ring, cq->cq_size); + cq->polarity = 1; +} + +/** + * irdma_uk_clean_cq - clean cq entries + * @q: completion context + * @cq: cq to clean + */ +void irdma_uk_clean_cq(void *q, struct irdma_cq_uk *cq) +{ + __le64 *cqe; + u64 qword3, comp_ctx; + u32 cq_head; + u8 polarity, temp; + + cq_head = cq->cq_ring.head; + temp = cq->polarity; + do { + if (cq->avoid_mem_cflct) + cqe = ((struct irdma_extended_cqe *)(cq->cq_base))[cq_head].buf; + else + cqe = cq->cq_base[cq_head].buf; + get_64bit_val(cqe, 24, &qword3); + polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword3); + + if (polarity != temp) + break; + + /* Ensure CQE contents are read after valid bit is checked */ + dma_rmb(); + + get_64bit_val(cqe, 8, &comp_ctx); + if ((void *)(unsigned long)comp_ctx == q) + set_64bit_val(cqe, 8, 0); + + cq_head = (cq_head + 1) % cq->cq_ring.size; + if (!cq_head) + temp ^= 1; + } while (true); +} + +/** + * irdma_nop - post a nop + * @qp: hw qp ptr + * @wr_id: work request id + * @signaled: signaled for completion + * @post_sq: ring doorbell + */ +int irdma_nop(struct irdma_qp_uk *qp, u64 wr_id, bool signaled, bool post_sq) +{ + __le64 *wqe; + u64 hdr; + u32 wqe_idx; + struct irdma_post_sq_info info = {}; + + info.push_wqe = false; + info.wr_id = wr_id; + wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, IRDMA_QP_WQE_MIN_QUANTA, + 0, &info); + if (!wqe) + return -ENOMEM; + + irdma_clr_wqes(qp, wqe_idx); + + set_64bit_val(wqe, 0, 0); + set_64bit_val(wqe, 8, 0); + set_64bit_val(wqe, 16, 0); + + hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMAQP_OP_NOP) | + FIELD_PREP(IRDMAQPSQ_SIGCOMPL, signaled) | + FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity); + + dma_wmb(); /* make sure WQE is populated before valid bit is set */ + + set_64bit_val(wqe, 24, hdr); + if (post_sq) + irdma_uk_qp_post_wr(qp); + + return 0; +} + +/** + * irdma_fragcnt_to_quanta_sq - calculate quanta based on fragment count for SQ + * @frag_cnt: number of fragments + * @quanta: quanta for frag_cnt + */ +int irdma_fragcnt_to_quanta_sq(u32 frag_cnt, u16 *quanta) +{ + switch (frag_cnt) { + case 0: + case 1: + *quanta = IRDMA_QP_WQE_MIN_QUANTA; + break; + case 2: + case 3: + *quanta = 2; + break; + case 4: + case 5: + *quanta = 3; + break; + case 6: + case 7: + *quanta = 4; + break; + case 8: + case 9: + *quanta = 5; + break; + case 10: + case 11: + *quanta = 6; + break; + case 12: + case 13: + *quanta = 7; + break; + case 14: + case 15: /* when immediate data is present */ + *quanta = 8; + break; + default: + return -EINVAL; + } + + return 0; +} + +/** + * irdma_fragcnt_to_wqesize_rq - calculate wqe size based on fragment count for RQ + * @frag_cnt: number of fragments + * @wqe_size: size in bytes given frag_cnt + */ +int irdma_fragcnt_to_wqesize_rq(u32 frag_cnt, u16 *wqe_size) +{ + switch (frag_cnt) { + case 0: + case 1: + *wqe_size = 32; + break; + case 2: + case 3: + *wqe_size = 64; + break; + case 4: + case 5: + case 6: + case 7: + *wqe_size = 128; + break; + case 8: + case 9: + case 10: + case 11: + case 12: + case 13: + case 14: + *wqe_size = 256; + break; + default: + return -EINVAL; + } + + return 0; +} |