// 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) { __le64 *wqe; u32 wqe_idx; if (!(qp_wqe_idx & 0x7F)) { wqe_idx = (qp_wqe_idx + 128) % qp->sq_ring.size; wqe = qp->sq_base[wqe_idx].elem; if (wqe_idx) memset(wqe, qp->swqe_polarity ? 0 : 0xFF, 0x1000); else memset(wqe, qp->swqe_polarity ? 0xFF : 0, 0x1000); } } /** * 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, op_info->sg_list, 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 * @dest: pointer to wqe * @src: pointer to inline data * @len: length of inline data to copy * @polarity: compatibility parameter */ static void irdma_copy_inline_data_gen_1(u8 *dest, u8 *src, u32 len, u8 polarity) { if (len <= 16) { memcpy(dest, src, len); } else { memcpy(dest, src, 16); src += 16; dest = dest + 32; memcpy(dest, src, len - 16); } } /** * 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 * @dest: pointer to wqe * @src: pointer to inline data * @len: length of inline data to copy * @polarity: polarity of wqe valid bit */ static void irdma_copy_inline_data(u8 *dest, u8 *src, u32 len, u8 polarity) { u8 inline_valid = polarity << IRDMA_INLINE_VALID_S; u32 copy_size; dest += 8; if (len <= 8) { memcpy(dest, src, len); return; } *((u64 *)dest) = *((u64 *)src); len -= 8; src += 8; dest += 24; /* point to additional 32 byte quanta */ while (len) { copy_size = len < 31 ? len : 31; memcpy(dest, src, copy_size); *(dest + 31) = inline_valid; len -= copy_size; dest += 32; src += copy_size; } } /** * 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_inline_rdma_write *op_info; u64 hdr = 0; u32 wqe_idx; bool read_fence = false; u16 quanta; info->push_wqe = qp->push_db ? true : false; op_info = &info->op.inline_rdma_write; if (op_info->len > qp->max_inline_data) return -EINVAL; quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(op_info->len); wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, op_info->len, 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, op_info->len) | 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->data, op_info->len, 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_inline_send *op_info; u64 hdr; u32 wqe_idx; bool read_fence = false; u16 quanta; info->push_wqe = qp->push_db ? true : false; op_info = &info->op.inline_send; if (op_info->len > qp->max_inline_data) return -EINVAL; quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(op_info->len); wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, op_info->len, 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, op_info->len) | 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->data, op_info->len, 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, q_type; int ret_code; bool move_cq_head = true; u8 polarity; u8 op_type; 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; } 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; if (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 (info->imm_valid) info->op_type = IRDMA_OP_TYPE_REC_IMM; else info->op_type = IRDMA_OP_TYPE_REC; 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); op_type = (u8)FIELD_GET(IRDMAQPSQ_OPCODE, wqe_qword); info->op_type = op_type; IRDMA_RING_SET_TAIL(qp->sq_ring, tail + qp->sq_wrtrk_array[tail].quanta); if (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 (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; 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; }