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linux-zen-server/drivers/infiniband/hw/irdma/uk.c

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// 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,
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(IRDMA_CQ_SQ, 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;
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;
}
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