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linux/drivers/infiniband/hw/hns/hns_roce_qp.c

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/*
* Copyright (c) 2016 Hisilicon Limited.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_umem.h>
#include <rdma/uverbs_ioctl.h>
#include "hns_roce_common.h"
#include "hns_roce_device.h"
#include "hns_roce_hem.h"
#include <rdma/hns-abi.h>
#define SQP_NUM (2 * HNS_ROCE_MAX_PORTS)
void hns_roce_qp_event(struct hns_roce_dev *hr_dev, u32 qpn, int event_type)
{
struct device *dev = hr_dev->dev;
struct hns_roce_qp *qp;
xa_lock(&hr_dev->qp_table_xa);
qp = __hns_roce_qp_lookup(hr_dev, qpn);
if (qp)
atomic_inc(&qp->refcount);
xa_unlock(&hr_dev->qp_table_xa);
if (!qp) {
dev_warn(dev, "Async event for bogus QP %08x\n", qpn);
return;
}
qp->event(qp, (enum hns_roce_event)event_type);
if (atomic_dec_and_test(&qp->refcount))
complete(&qp->free);
}
static void hns_roce_ib_qp_event(struct hns_roce_qp *hr_qp,
enum hns_roce_event type)
{
struct ib_event event;
struct ib_qp *ibqp = &hr_qp->ibqp;
if (ibqp->event_handler) {
event.device = ibqp->device;
event.element.qp = ibqp;
switch (type) {
case HNS_ROCE_EVENT_TYPE_PATH_MIG:
event.event = IB_EVENT_PATH_MIG;
break;
case HNS_ROCE_EVENT_TYPE_COMM_EST:
event.event = IB_EVENT_COMM_EST;
break;
case HNS_ROCE_EVENT_TYPE_SQ_DRAINED:
event.event = IB_EVENT_SQ_DRAINED;
break;
case HNS_ROCE_EVENT_TYPE_SRQ_LAST_WQE_REACH:
event.event = IB_EVENT_QP_LAST_WQE_REACHED;
break;
case HNS_ROCE_EVENT_TYPE_WQ_CATAS_ERROR:
event.event = IB_EVENT_QP_FATAL;
break;
case HNS_ROCE_EVENT_TYPE_PATH_MIG_FAILED:
event.event = IB_EVENT_PATH_MIG_ERR;
break;
case HNS_ROCE_EVENT_TYPE_INV_REQ_LOCAL_WQ_ERROR:
event.event = IB_EVENT_QP_REQ_ERR;
break;
case HNS_ROCE_EVENT_TYPE_LOCAL_WQ_ACCESS_ERROR:
event.event = IB_EVENT_QP_ACCESS_ERR;
break;
default:
dev_dbg(ibqp->device->dev.parent, "roce_ib: Unexpected event type %d on QP %06lx\n",
type, hr_qp->qpn);
return;
}
ibqp->event_handler(&event, ibqp->qp_context);
}
}
static int hns_roce_reserve_range_qp(struct hns_roce_dev *hr_dev, int cnt,
int align, unsigned long *base)
{
struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
return hns_roce_bitmap_alloc_range(&qp_table->bitmap, cnt, align,
base) ?
-ENOMEM :
0;
}
enum hns_roce_qp_state to_hns_roce_state(enum ib_qp_state state)
{
switch (state) {
case IB_QPS_RESET:
return HNS_ROCE_QP_STATE_RST;
case IB_QPS_INIT:
return HNS_ROCE_QP_STATE_INIT;
case IB_QPS_RTR:
return HNS_ROCE_QP_STATE_RTR;
case IB_QPS_RTS:
return HNS_ROCE_QP_STATE_RTS;
case IB_QPS_SQD:
return HNS_ROCE_QP_STATE_SQD;
case IB_QPS_ERR:
return HNS_ROCE_QP_STATE_ERR;
default:
return HNS_ROCE_QP_NUM_STATE;
}
}
static int hns_roce_gsi_qp_alloc(struct hns_roce_dev *hr_dev, unsigned long qpn,
struct hns_roce_qp *hr_qp)
{
struct xarray *xa = &hr_dev->qp_table_xa;
int ret;
if (!qpn)
return -EINVAL;
hr_qp->qpn = qpn;
atomic_set(&hr_qp->refcount, 1);
init_completion(&hr_qp->free);
ret = xa_err(xa_store_irq(xa, hr_qp->qpn & (hr_dev->caps.num_qps - 1),
hr_qp, GFP_KERNEL));
if (ret)
dev_err(hr_dev->dev, "QPC xa_store failed\n");
return ret;
}
static int hns_roce_qp_alloc(struct hns_roce_dev *hr_dev, unsigned long qpn,
struct hns_roce_qp *hr_qp)
{
struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
struct device *dev = hr_dev->dev;
int ret;
if (!qpn)
return -EINVAL;
hr_qp->qpn = qpn;
/* Alloc memory for QPC */
ret = hns_roce_table_get(hr_dev, &qp_table->qp_table, hr_qp->qpn);
if (ret) {
dev_err(dev, "QPC table get failed\n");
goto err_out;
}
/* Alloc memory for IRRL */
ret = hns_roce_table_get(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
if (ret) {
dev_err(dev, "IRRL table get failed\n");
goto err_put_qp;
}
if (hr_dev->caps.trrl_entry_sz) {
/* Alloc memory for TRRL */
ret = hns_roce_table_get(hr_dev, &qp_table->trrl_table,
hr_qp->qpn);
if (ret) {
dev_err(dev, "TRRL table get failed\n");
goto err_put_irrl;
}
}
if (hr_dev->caps.sccc_entry_sz) {
/* Alloc memory for SCC CTX */
ret = hns_roce_table_get(hr_dev, &qp_table->sccc_table,
hr_qp->qpn);
if (ret) {
dev_err(dev, "SCC CTX table get failed\n");
goto err_put_trrl;
}
}
ret = hns_roce_gsi_qp_alloc(hr_dev, qpn, hr_qp);
if (ret)
goto err_put_sccc;
return 0;
err_put_sccc:
if (hr_dev->caps.sccc_entry_sz)
hns_roce_table_put(hr_dev, &qp_table->sccc_table,
hr_qp->qpn);
err_put_trrl:
if (hr_dev->caps.trrl_entry_sz)
hns_roce_table_put(hr_dev, &qp_table->trrl_table, hr_qp->qpn);
err_put_irrl:
hns_roce_table_put(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
err_put_qp:
hns_roce_table_put(hr_dev, &qp_table->qp_table, hr_qp->qpn);
err_out:
return ret;
}
void hns_roce_qp_remove(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
{
struct xarray *xa = &hr_dev->qp_table_xa;
unsigned long flags;
xa_lock_irqsave(xa, flags);
__xa_erase(xa, hr_qp->qpn & (hr_dev->caps.num_qps - 1));
xa_unlock_irqrestore(xa, flags);
}
void hns_roce_qp_free(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp)
{
struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
if (atomic_dec_and_test(&hr_qp->refcount))
complete(&hr_qp->free);
wait_for_completion(&hr_qp->free);
if ((hr_qp->ibqp.qp_type) != IB_QPT_GSI) {
if (hr_dev->caps.trrl_entry_sz)
hns_roce_table_put(hr_dev, &qp_table->trrl_table,
hr_qp->qpn);
hns_roce_table_put(hr_dev, &qp_table->irrl_table, hr_qp->qpn);
}
}
void hns_roce_release_range_qp(struct hns_roce_dev *hr_dev, int base_qpn,
int cnt)
{
struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
if (base_qpn < hr_dev->caps.reserved_qps)
return;
hns_roce_bitmap_free_range(&qp_table->bitmap, base_qpn, cnt, BITMAP_RR);
}
static int hns_roce_set_rq_size(struct hns_roce_dev *hr_dev,
struct ib_qp_cap *cap, bool is_user, int has_rq,
struct hns_roce_qp *hr_qp)
{
struct device *dev = hr_dev->dev;
u32 max_cnt;
/* Check the validity of QP support capacity */
if (cap->max_recv_wr > hr_dev->caps.max_wqes ||
cap->max_recv_sge > hr_dev->caps.max_rq_sg) {
dev_err(dev, "RQ WR or sge error!max_recv_wr=%d max_recv_sge=%d\n",
cap->max_recv_wr, cap->max_recv_sge);
return -EINVAL;
}
/* If srq exist, set zero for relative number of rq */
if (!has_rq) {
hr_qp->rq.wqe_cnt = 0;
hr_qp->rq.max_gs = 0;
cap->max_recv_wr = 0;
cap->max_recv_sge = 0;
} else {
if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge)) {
dev_err(dev, "user space no need config max_recv_wr max_recv_sge\n");
return -EINVAL;
}
if (hr_dev->caps.min_wqes)
max_cnt = max(cap->max_recv_wr, hr_dev->caps.min_wqes);
else
max_cnt = cap->max_recv_wr;
hr_qp->rq.wqe_cnt = roundup_pow_of_two(max_cnt);
if ((u32)hr_qp->rq.wqe_cnt > hr_dev->caps.max_wqes) {
dev_err(dev, "while setting rq size, rq.wqe_cnt too large\n");
return -EINVAL;
}
max_cnt = max(1U, cap->max_recv_sge);
hr_qp->rq.max_gs = roundup_pow_of_two(max_cnt);
if (hr_dev->caps.max_rq_sg <= 2)
hr_qp->rq.wqe_shift =
ilog2(hr_dev->caps.max_rq_desc_sz);
else
hr_qp->rq.wqe_shift =
ilog2(hr_dev->caps.max_rq_desc_sz
* hr_qp->rq.max_gs);
}
cap->max_recv_wr = hr_qp->rq.max_post = hr_qp->rq.wqe_cnt;
cap->max_recv_sge = hr_qp->rq.max_gs;
return 0;
}
static int check_sq_size_with_integrity(struct hns_roce_dev *hr_dev,
struct ib_qp_cap *cap,
struct hns_roce_ib_create_qp *ucmd)
{
u32 roundup_sq_stride = roundup_pow_of_two(hr_dev->caps.max_sq_desc_sz);
u8 max_sq_stride = ilog2(roundup_sq_stride);
/* Sanity check SQ size before proceeding */
if ((u32)(1 << ucmd->log_sq_bb_count) > hr_dev->caps.max_wqes ||
ucmd->log_sq_stride > max_sq_stride ||
ucmd->log_sq_stride < HNS_ROCE_IB_MIN_SQ_STRIDE) {
ibdev_err(&hr_dev->ib_dev, "check SQ size error!\n");
return -EINVAL;
}
if (cap->max_send_sge > hr_dev->caps.max_sq_sg) {
ibdev_err(&hr_dev->ib_dev, "SQ sge error! max_send_sge=%d\n",
cap->max_send_sge);
return -EINVAL;
}
return 0;
}
static int hns_roce_set_user_sq_size(struct hns_roce_dev *hr_dev,
struct ib_qp_cap *cap,
struct hns_roce_qp *hr_qp,
struct hns_roce_ib_create_qp *ucmd)
{
u32 ex_sge_num;
u32 page_size;
u32 max_cnt;
int ret;
ret = check_sq_size_with_integrity(hr_dev, cap, ucmd);
if (ret) {
ibdev_err(&hr_dev->ib_dev, "Sanity check sq size failed\n");
return ret;
}
hr_qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
hr_qp->sq.wqe_shift = ucmd->log_sq_stride;
max_cnt = max(1U, cap->max_send_sge);
if (hr_dev->caps.max_sq_sg <= 2)
hr_qp->sq.max_gs = roundup_pow_of_two(max_cnt);
else
hr_qp->sq.max_gs = max_cnt;
if (hr_qp->sq.max_gs > 2)
hr_qp->sge.sge_cnt = roundup_pow_of_two(hr_qp->sq.wqe_cnt *
(hr_qp->sq.max_gs - 2));
if ((hr_qp->sq.max_gs > 2) && (hr_dev->pci_dev->revision == 0x20)) {
if (hr_qp->sge.sge_cnt > hr_dev->caps.max_extend_sg) {
dev_err(hr_dev->dev,
"The extended sge cnt error! sge_cnt=%d\n",
hr_qp->sge.sge_cnt);
return -EINVAL;
}
}
hr_qp->sge.sge_shift = 4;
ex_sge_num = hr_qp->sge.sge_cnt;
/* Get buf size, SQ and RQ are aligned to page_szie */
if (hr_dev->caps.max_sq_sg <= 2) {
hr_qp->buff_size = HNS_ROCE_ALOGN_UP((hr_qp->rq.wqe_cnt <<
hr_qp->rq.wqe_shift), PAGE_SIZE) +
HNS_ROCE_ALOGN_UP((hr_qp->sq.wqe_cnt <<
hr_qp->sq.wqe_shift), PAGE_SIZE);
hr_qp->sq.offset = 0;
hr_qp->rq.offset = HNS_ROCE_ALOGN_UP((hr_qp->sq.wqe_cnt <<
hr_qp->sq.wqe_shift), PAGE_SIZE);
} else {
page_size = 1 << (hr_dev->caps.mtt_buf_pg_sz + PAGE_SHIFT);
hr_qp->sge.sge_cnt = ex_sge_num ?
max(page_size / (1 << hr_qp->sge.sge_shift), ex_sge_num) : 0;
hr_qp->buff_size = HNS_ROCE_ALOGN_UP((hr_qp->rq.wqe_cnt <<
hr_qp->rq.wqe_shift), page_size) +
HNS_ROCE_ALOGN_UP((hr_qp->sge.sge_cnt <<
hr_qp->sge.sge_shift), page_size) +
HNS_ROCE_ALOGN_UP((hr_qp->sq.wqe_cnt <<
hr_qp->sq.wqe_shift), page_size);
hr_qp->sq.offset = 0;
if (ex_sge_num) {
hr_qp->sge.offset = HNS_ROCE_ALOGN_UP(
(hr_qp->sq.wqe_cnt <<
hr_qp->sq.wqe_shift),
page_size);
hr_qp->rq.offset = hr_qp->sge.offset +
HNS_ROCE_ALOGN_UP((hr_qp->sge.sge_cnt <<
hr_qp->sge.sge_shift),
page_size);
} else {
hr_qp->rq.offset = HNS_ROCE_ALOGN_UP(
(hr_qp->sq.wqe_cnt <<
hr_qp->sq.wqe_shift),
page_size);
}
}
return 0;
}
static int split_wqe_buf_region(struct hns_roce_dev *hr_dev,
struct hns_roce_qp *hr_qp,
struct hns_roce_buf_region *regions,
int region_max, int page_shift)
{
int page_size = 1 << page_shift;
bool is_extend_sge;
int region_cnt = 0;
int buf_size;
int buf_cnt;
if (hr_qp->buff_size < 1 || region_max < 1)
return region_cnt;
if (hr_qp->sge.sge_cnt > 0)
is_extend_sge = true;
else
is_extend_sge = false;
/* sq region */
if (is_extend_sge)
buf_size = hr_qp->sge.offset - hr_qp->sq.offset;
else
buf_size = hr_qp->rq.offset - hr_qp->sq.offset;
if (buf_size > 0 && region_cnt < region_max) {
buf_cnt = DIV_ROUND_UP(buf_size, page_size);
hns_roce_init_buf_region(&regions[region_cnt],
hr_dev->caps.wqe_sq_hop_num,
hr_qp->sq.offset / page_size,
buf_cnt);
region_cnt++;
}
/* sge region */
if (is_extend_sge) {
buf_size = hr_qp->rq.offset - hr_qp->sge.offset;
if (buf_size > 0 && region_cnt < region_max) {
buf_cnt = DIV_ROUND_UP(buf_size, page_size);
hns_roce_init_buf_region(&regions[region_cnt],
hr_dev->caps.wqe_sge_hop_num,
hr_qp->sge.offset / page_size,
buf_cnt);
region_cnt++;
}
}
/* rq region */
buf_size = hr_qp->buff_size - hr_qp->rq.offset;
if (buf_size > 0) {
buf_cnt = DIV_ROUND_UP(buf_size, page_size);
hns_roce_init_buf_region(&regions[region_cnt],
hr_dev->caps.wqe_rq_hop_num,
hr_qp->rq.offset / page_size,
buf_cnt);
region_cnt++;
}
return region_cnt;
}
static int calc_wqe_bt_page_shift(struct hns_roce_dev *hr_dev,
struct hns_roce_buf_region *regions,
int region_cnt)
{
int bt_pg_shift;
int ba_num;
int ret;
bt_pg_shift = PAGE_SHIFT + hr_dev->caps.mtt_ba_pg_sz;
/* all root ba entries must in one bt page */
do {
ba_num = (1 << bt_pg_shift) / BA_BYTE_LEN;
ret = hns_roce_hem_list_calc_root_ba(regions, region_cnt,
ba_num);
if (ret <= ba_num)
break;
bt_pg_shift++;
} while (ret > ba_num);
return bt_pg_shift - PAGE_SHIFT;
}
static int set_extend_sge_param(struct hns_roce_dev *hr_dev,
struct hns_roce_qp *hr_qp)
{
struct device *dev = hr_dev->dev;
if (hr_qp->sq.max_gs > 2) {
hr_qp->sge.sge_cnt = roundup_pow_of_two(hr_qp->sq.wqe_cnt *
(hr_qp->sq.max_gs - 2));
hr_qp->sge.sge_shift = 4;
}
/* ud sqwqe's sge use extend sge */
if (hr_dev->caps.max_sq_sg > 2 && hr_qp->ibqp.qp_type == IB_QPT_GSI) {
hr_qp->sge.sge_cnt = roundup_pow_of_two(hr_qp->sq.wqe_cnt *
hr_qp->sq.max_gs);
hr_qp->sge.sge_shift = 4;
}
if ((hr_qp->sq.max_gs > 2) && hr_dev->pci_dev->revision == 0x20) {
if (hr_qp->sge.sge_cnt > hr_dev->caps.max_extend_sg) {
dev_err(dev, "The extended sge cnt error! sge_cnt=%d\n",
hr_qp->sge.sge_cnt);
return -EINVAL;
}
}
return 0;
}
static int hns_roce_set_kernel_sq_size(struct hns_roce_dev *hr_dev,
struct ib_qp_cap *cap,
struct hns_roce_qp *hr_qp)
{
struct device *dev = hr_dev->dev;
u32 page_size;
u32 max_cnt;
int size;
int ret;
if (cap->max_send_wr > hr_dev->caps.max_wqes ||
cap->max_send_sge > hr_dev->caps.max_sq_sg ||
cap->max_inline_data > hr_dev->caps.max_sq_inline) {
dev_err(dev, "SQ WR or sge or inline data error!\n");
return -EINVAL;
}
hr_qp->sq.wqe_shift = ilog2(hr_dev->caps.max_sq_desc_sz);
if (hr_dev->caps.min_wqes)
max_cnt = max(cap->max_send_wr, hr_dev->caps.min_wqes);
else
max_cnt = cap->max_send_wr;
hr_qp->sq.wqe_cnt = roundup_pow_of_two(max_cnt);
if ((u32)hr_qp->sq.wqe_cnt > hr_dev->caps.max_wqes) {
dev_err(dev, "while setting kernel sq size, sq.wqe_cnt too large\n");
return -EINVAL;
}
/* Get data_seg numbers */
max_cnt = max(1U, cap->max_send_sge);
if (hr_dev->caps.max_sq_sg <= 2)
hr_qp->sq.max_gs = roundup_pow_of_two(max_cnt);
else
hr_qp->sq.max_gs = max_cnt;
ret = set_extend_sge_param(hr_dev, hr_qp);
if (ret) {
dev_err(dev, "set extend sge parameters fail\n");
return ret;
}
/* Get buf size, SQ and RQ are aligned to PAGE_SIZE */
page_size = 1 << (hr_dev->caps.mtt_buf_pg_sz + PAGE_SHIFT);
hr_qp->sq.offset = 0;
size = HNS_ROCE_ALOGN_UP(hr_qp->sq.wqe_cnt << hr_qp->sq.wqe_shift,
page_size);
if (hr_dev->caps.max_sq_sg > 2 && hr_qp->sge.sge_cnt) {
hr_qp->sge.sge_cnt = max(page_size/(1 << hr_qp->sge.sge_shift),
(u32)hr_qp->sge.sge_cnt);
hr_qp->sge.offset = size;
size += HNS_ROCE_ALOGN_UP(hr_qp->sge.sge_cnt <<
hr_qp->sge.sge_shift, page_size);
}
hr_qp->rq.offset = size;
size += HNS_ROCE_ALOGN_UP((hr_qp->rq.wqe_cnt << hr_qp->rq.wqe_shift),
page_size);
hr_qp->buff_size = size;
/* Get wr and sge number which send */
cap->max_send_wr = hr_qp->sq.max_post = hr_qp->sq.wqe_cnt;
cap->max_send_sge = hr_qp->sq.max_gs;
/* We don't support inline sends for kernel QPs (yet) */
cap->max_inline_data = 0;
return 0;
}
static int hns_roce_qp_has_sq(struct ib_qp_init_attr *attr)
{
if (attr->qp_type == IB_QPT_XRC_TGT || !attr->cap.max_send_wr)
return 0;
return 1;
}
static int hns_roce_qp_has_rq(struct ib_qp_init_attr *attr)
{
if (attr->qp_type == IB_QPT_XRC_INI ||
attr->qp_type == IB_QPT_XRC_TGT || attr->srq ||
!attr->cap.max_recv_wr)
return 0;
return 1;
}
static int alloc_rq_inline_buf(struct hns_roce_qp *hr_qp,
struct ib_qp_init_attr *init_attr)
{
u32 max_recv_sge = init_attr->cap.max_recv_sge;
struct hns_roce_rinl_wqe *wqe_list;
u32 wqe_cnt = hr_qp->rq.wqe_cnt;
int i;
/* allocate recv inline buf */
wqe_list = kcalloc(wqe_cnt, sizeof(struct hns_roce_rinl_wqe),
GFP_KERNEL);
if (!wqe_list)
goto err;
/* Allocate a continuous buffer for all inline sge we need */
wqe_list[0].sg_list = kcalloc(wqe_cnt, (max_recv_sge *
sizeof(struct hns_roce_rinl_sge)),
GFP_KERNEL);
if (!wqe_list[0].sg_list)
goto err_wqe_list;
/* Assign buffers of sg_list to each inline wqe */
for (i = 1; i < wqe_cnt; i++)
wqe_list[i].sg_list = &wqe_list[0].sg_list[i * max_recv_sge];
hr_qp->rq_inl_buf.wqe_list = wqe_list;
hr_qp->rq_inl_buf.wqe_cnt = wqe_cnt;
return 0;
err_wqe_list:
kfree(wqe_list);
err:
return -ENOMEM;
}
static void free_rq_inline_buf(struct hns_roce_qp *hr_qp)
{
kfree(hr_qp->rq_inl_buf.wqe_list[0].sg_list);
kfree(hr_qp->rq_inl_buf.wqe_list);
}
static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
struct ib_pd *ib_pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata, unsigned long sqpn,
struct hns_roce_qp *hr_qp)
{
dma_addr_t *buf_list[ARRAY_SIZE(hr_qp->regions)] = { NULL };
struct device *dev = hr_dev->dev;
struct hns_roce_ib_create_qp ucmd;
struct hns_roce_ib_create_qp_resp resp = {};
struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(
udata, struct hns_roce_ucontext, ibucontext);
struct hns_roce_buf_region *r;
unsigned long qpn = 0;
u32 page_shift;
int buf_count;
int ret;
int i;
mutex_init(&hr_qp->mutex);
spin_lock_init(&hr_qp->sq.lock);
spin_lock_init(&hr_qp->rq.lock);
hr_qp->state = IB_QPS_RESET;
hr_qp->ibqp.qp_type = init_attr->qp_type;
if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
hr_qp->sq_signal_bits = IB_SIGNAL_ALL_WR;
else
hr_qp->sq_signal_bits = IB_SIGNAL_REQ_WR;
ret = hns_roce_set_rq_size(hr_dev, &init_attr->cap, udata,
hns_roce_qp_has_rq(init_attr), hr_qp);
if (ret) {
dev_err(dev, "hns_roce_set_rq_size failed\n");
goto err_out;
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE) &&
hns_roce_qp_has_rq(init_attr)) {
ret = alloc_rq_inline_buf(hr_qp, init_attr);
if (ret) {
dev_err(dev, "allocate receive inline buffer failed\n");
goto err_out;
}
}
page_shift = PAGE_SHIFT + hr_dev->caps.mtt_buf_pg_sz;
if (udata) {
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
dev_err(dev, "ib_copy_from_udata error for create qp\n");
ret = -EFAULT;
goto err_alloc_rq_inline_buf;
}
ret = hns_roce_set_user_sq_size(hr_dev, &init_attr->cap, hr_qp,
&ucmd);
if (ret) {
dev_err(dev, "hns_roce_set_user_sq_size error for create qp\n");
goto err_alloc_rq_inline_buf;
}
hr_qp->umem = ib_umem_get(udata, ucmd.buf_addr,
hr_qp->buff_size, 0, 0);
if (IS_ERR(hr_qp->umem)) {
dev_err(dev, "ib_umem_get error for create qp\n");
ret = PTR_ERR(hr_qp->umem);
goto err_alloc_rq_inline_buf;
}
hr_qp->region_cnt = split_wqe_buf_region(hr_dev, hr_qp,
hr_qp->regions, ARRAY_SIZE(hr_qp->regions),
page_shift);
ret = hns_roce_alloc_buf_list(hr_qp->regions, buf_list,
hr_qp->region_cnt);
if (ret) {
dev_err(dev, "alloc buf_list error for create qp\n");
goto err_alloc_list;
}
for (i = 0; i < hr_qp->region_cnt; i++) {
r = &hr_qp->regions[i];
buf_count = hns_roce_get_umem_bufs(hr_dev,
buf_list[i], r->count, r->offset,
hr_qp->umem, page_shift);
if (buf_count != r->count) {
dev_err(dev,
"get umem buf err, expect %d,ret %d.\n",
r->count, buf_count);
ret = -ENOBUFS;
goto err_get_bufs;
}
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SQ_RECORD_DB) &&
(udata->inlen >= sizeof(ucmd)) &&
(udata->outlen >= sizeof(resp)) &&
hns_roce_qp_has_sq(init_attr)) {
ret = hns_roce_db_map_user(uctx, udata, ucmd.sdb_addr,
&hr_qp->sdb);
if (ret) {
dev_err(dev, "sq record doorbell map failed!\n");
goto err_get_bufs;
}
/* indicate kernel supports sq record db */
resp.cap_flags |= HNS_ROCE_SUPPORT_SQ_RECORD_DB;
hr_qp->sdb_en = 1;
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp)) &&
hns_roce_qp_has_rq(init_attr)) {
ret = hns_roce_db_map_user(uctx, udata, ucmd.db_addr,
&hr_qp->rdb);
if (ret) {
dev_err(dev, "rq record doorbell map failed!\n");
goto err_sq_dbmap;
}
/* indicate kernel supports rq record db */
resp.cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
hr_qp->rdb_en = 1;
}
} else {
if (init_attr->create_flags &
IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) {
dev_err(dev, "init_attr->create_flags error!\n");
ret = -EINVAL;
goto err_alloc_rq_inline_buf;
}
if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) {
dev_err(dev, "init_attr->create_flags error!\n");
ret = -EINVAL;
goto err_alloc_rq_inline_buf;
}
/* Set SQ size */
ret = hns_roce_set_kernel_sq_size(hr_dev, &init_attr->cap,
hr_qp);
if (ret) {
dev_err(dev, "hns_roce_set_kernel_sq_size error!\n");
goto err_alloc_rq_inline_buf;
}
/* QP doorbell register address */
hr_qp->sq.db_reg_l = hr_dev->reg_base + hr_dev->sdb_offset +
DB_REG_OFFSET * hr_dev->priv_uar.index;
hr_qp->rq.db_reg_l = hr_dev->reg_base + hr_dev->odb_offset +
DB_REG_OFFSET * hr_dev->priv_uar.index;
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
hns_roce_qp_has_rq(init_attr)) {
ret = hns_roce_alloc_db(hr_dev, &hr_qp->rdb, 0);
if (ret) {
dev_err(dev, "rq record doorbell alloc failed!\n");
goto err_alloc_rq_inline_buf;
}
*hr_qp->rdb.db_record = 0;
hr_qp->rdb_en = 1;
}
/* Allocate QP buf */
if (hns_roce_buf_alloc(hr_dev, hr_qp->buff_size,
(1 << page_shift) * 2,
&hr_qp->hr_buf, page_shift)) {
dev_err(dev, "hns_roce_buf_alloc error!\n");
ret = -ENOMEM;
goto err_db;
}
hr_qp->region_cnt = split_wqe_buf_region(hr_dev, hr_qp,
hr_qp->regions, ARRAY_SIZE(hr_qp->regions),
page_shift);
ret = hns_roce_alloc_buf_list(hr_qp->regions, buf_list,
hr_qp->region_cnt);
if (ret) {
dev_err(dev, "alloc buf_list error for create qp!\n");
goto err_alloc_list;
}
for (i = 0; i < hr_qp->region_cnt; i++) {
r = &hr_qp->regions[i];
buf_count = hns_roce_get_kmem_bufs(hr_dev,
buf_list[i], r->count, r->offset,
&hr_qp->hr_buf);
if (buf_count != r->count) {
dev_err(dev,
"get kmem buf err, expect %d,ret %d.\n",
r->count, buf_count);
ret = -ENOBUFS;
goto err_get_bufs;
}
}
hr_qp->sq.wrid = kcalloc(hr_qp->sq.wqe_cnt, sizeof(u64),
GFP_KERNEL);
if (ZERO_OR_NULL_PTR(hr_qp->sq.wrid)) {
ret = -ENOMEM;
goto err_get_bufs;
}
if (hr_qp->rq.wqe_cnt) {
hr_qp->rq.wrid = kcalloc(hr_qp->rq.wqe_cnt, sizeof(u64),
GFP_KERNEL);
if (ZERO_OR_NULL_PTR(hr_qp->rq.wrid)) {
ret = -ENOMEM;
goto err_sq_wrid;
}
}
}
if (sqpn) {
qpn = sqpn;
} else {
/* Get QPN */
ret = hns_roce_reserve_range_qp(hr_dev, 1, 1, &qpn);
if (ret) {
dev_err(dev, "hns_roce_reserve_range_qp alloc qpn error\n");
goto err_wrid;
}
}
hr_qp->wqe_bt_pg_shift = calc_wqe_bt_page_shift(hr_dev, hr_qp->regions,
hr_qp->region_cnt);
hns_roce_mtr_init(&hr_qp->mtr, PAGE_SHIFT + hr_qp->wqe_bt_pg_shift,
page_shift);
ret = hns_roce_mtr_attach(hr_dev, &hr_qp->mtr, buf_list,
hr_qp->regions, hr_qp->region_cnt);
if (ret) {
dev_err(dev, "mtr attach error for create qp\n");
goto err_mtr;
}
if (init_attr->qp_type == IB_QPT_GSI &&
hr_dev->hw_rev == HNS_ROCE_HW_VER1) {
/* In v1 engine, GSI QP context in RoCE engine's register */
ret = hns_roce_gsi_qp_alloc(hr_dev, qpn, hr_qp);
if (ret) {
dev_err(dev, "hns_roce_qp_alloc failed!\n");
goto err_qpn;
}
} else {
ret = hns_roce_qp_alloc(hr_dev, qpn, hr_qp);
if (ret) {
dev_err(dev, "hns_roce_qp_alloc failed!\n");
goto err_qpn;
}
}
if (sqpn)
hr_qp->doorbell_qpn = 1;
else
hr_qp->doorbell_qpn = (u32)hr_qp->qpn;
if (udata) {
ret = ib_copy_to_udata(udata, &resp,
min(udata->outlen, sizeof(resp)));
if (ret)
goto err_qp;
}
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_QP_FLOW_CTRL) {
ret = hr_dev->hw->qp_flow_control_init(hr_dev, hr_qp);
if (ret)
goto err_qp;
}
hr_qp->event = hns_roce_ib_qp_event;
hns_roce_free_buf_list(buf_list, hr_qp->region_cnt);
return 0;
err_qp:
if (init_attr->qp_type == IB_QPT_GSI &&
hr_dev->hw_rev == HNS_ROCE_HW_VER1)
hns_roce_qp_remove(hr_dev, hr_qp);
else
hns_roce_qp_free(hr_dev, hr_qp);
err_qpn:
if (!sqpn)
hns_roce_release_range_qp(hr_dev, qpn, 1);
err_mtr:
hns_roce_mtr_cleanup(hr_dev, &hr_qp->mtr);
err_wrid:
if (udata) {
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp)) &&
hns_roce_qp_has_rq(init_attr))
hns_roce_db_unmap_user(uctx, &hr_qp->rdb);
} else {
if (hr_qp->rq.wqe_cnt)
kfree(hr_qp->rq.wrid);
}
err_sq_dbmap:
if (udata)
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_SQ_RECORD_DB) &&
(udata->inlen >= sizeof(ucmd)) &&
(udata->outlen >= sizeof(resp)) &&
hns_roce_qp_has_sq(init_attr))
hns_roce_db_unmap_user(uctx, &hr_qp->sdb);
err_sq_wrid:
if (!udata)
kfree(hr_qp->sq.wrid);
err_get_bufs:
hns_roce_free_buf_list(buf_list, hr_qp->region_cnt);
err_alloc_list:
if (!hr_qp->umem)
hns_roce_buf_free(hr_dev, hr_qp->buff_size, &hr_qp->hr_buf);
ib_umem_release(hr_qp->umem);
err_db:
if (!udata && hns_roce_qp_has_rq(init_attr) &&
(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB))
hns_roce_free_db(hr_dev, &hr_qp->rdb);
err_alloc_rq_inline_buf:
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE) &&
hns_roce_qp_has_rq(init_attr))
free_rq_inline_buf(hr_qp);
err_out:
return ret;
}
struct ib_qp *hns_roce_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_sqp *hr_sqp;
struct hns_roce_qp *hr_qp;
int ret;
switch (init_attr->qp_type) {
case IB_QPT_RC: {
hr_qp = kzalloc(sizeof(*hr_qp), GFP_KERNEL);
if (!hr_qp)
return ERR_PTR(-ENOMEM);
ret = hns_roce_create_qp_common(hr_dev, pd, init_attr, udata, 0,
hr_qp);
if (ret) {
ibdev_err(ibdev, "Create RC QP 0x%06lx failed(%d)\n",
hr_qp->qpn, ret);
kfree(hr_qp);
return ERR_PTR(ret);
}
hr_qp->ibqp.qp_num = hr_qp->qpn;
break;
}
case IB_QPT_GSI: {
/* Userspace is not allowed to create special QPs: */
if (udata) {
ibdev_err(ibdev, "not support usr space GSI\n");
return ERR_PTR(-EINVAL);
}
hr_sqp = kzalloc(sizeof(*hr_sqp), GFP_KERNEL);
if (!hr_sqp)
return ERR_PTR(-ENOMEM);
hr_qp = &hr_sqp->hr_qp;
hr_qp->port = init_attr->port_num - 1;
hr_qp->phy_port = hr_dev->iboe.phy_port[hr_qp->port];
/* when hw version is v1, the sqpn is allocated */
if (hr_dev->caps.max_sq_sg <= 2)
hr_qp->ibqp.qp_num = HNS_ROCE_MAX_PORTS +
hr_dev->iboe.phy_port[hr_qp->port];
else
hr_qp->ibqp.qp_num = 1;
ret = hns_roce_create_qp_common(hr_dev, pd, init_attr, udata,
hr_qp->ibqp.qp_num, hr_qp);
if (ret) {
ibdev_err(ibdev, "Create GSI QP failed!\n");
kfree(hr_sqp);
return ERR_PTR(ret);
}
break;
}
default:{
ibdev_err(ibdev, "not support QP type %d\n",
init_attr->qp_type);
return ERR_PTR(-EINVAL);
}
}
return &hr_qp->ibqp;
}
int to_hr_qp_type(int qp_type)
{
int transport_type;
if (qp_type == IB_QPT_RC)
transport_type = SERV_TYPE_RC;
else if (qp_type == IB_QPT_UC)
transport_type = SERV_TYPE_UC;
else if (qp_type == IB_QPT_UD)
transport_type = SERV_TYPE_UD;
else if (qp_type == IB_QPT_GSI)
transport_type = SERV_TYPE_UD;
else
transport_type = -1;
return transport_type;
}
static int check_mtu_validate(struct hns_roce_dev *hr_dev,
struct hns_roce_qp *hr_qp,
struct ib_qp_attr *attr, int attr_mask)
{
enum ib_mtu active_mtu;
int p;
p = attr_mask & IB_QP_PORT ? (attr->port_num - 1) : hr_qp->port;
active_mtu = iboe_get_mtu(hr_dev->iboe.netdevs[p]->mtu);
if ((hr_dev->caps.max_mtu >= IB_MTU_2048 &&
attr->path_mtu > hr_dev->caps.max_mtu) ||
attr->path_mtu < IB_MTU_256 || attr->path_mtu > active_mtu) {
ibdev_err(&hr_dev->ib_dev,
"attr path_mtu(%d)invalid while modify qp",
attr->path_mtu);
return -EINVAL;
}
return 0;
}
static int hns_roce_check_qp_attr(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
int p;
if ((attr_mask & IB_QP_PORT) &&
(attr->port_num == 0 || attr->port_num > hr_dev->caps.num_ports)) {
ibdev_err(&hr_dev->ib_dev,
"attr port_num invalid.attr->port_num=%d\n",
attr->port_num);
return -EINVAL;
}
if (attr_mask & IB_QP_PKEY_INDEX) {
p = attr_mask & IB_QP_PORT ? (attr->port_num - 1) : hr_qp->port;
if (attr->pkey_index >= hr_dev->caps.pkey_table_len[p]) {
ibdev_err(&hr_dev->ib_dev,
"attr pkey_index invalid.attr->pkey_index=%d\n",
attr->pkey_index);
return -EINVAL;
}
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
attr->max_rd_atomic > hr_dev->caps.max_qp_init_rdma) {
ibdev_err(&hr_dev->ib_dev,
"attr max_rd_atomic invalid.attr->max_rd_atomic=%d\n",
attr->max_rd_atomic);
return -EINVAL;
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
attr->max_dest_rd_atomic > hr_dev->caps.max_qp_dest_rdma) {
ibdev_err(&hr_dev->ib_dev,
"attr max_dest_rd_atomic invalid.attr->max_dest_rd_atomic=%d\n",
attr->max_dest_rd_atomic);
return -EINVAL;
}
if (attr_mask & IB_QP_PATH_MTU)
return check_mtu_validate(hr_dev, hr_qp, attr, attr_mask);
return 0;
}
int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
enum ib_qp_state cur_state, new_state;
int ret = -EINVAL;
mutex_lock(&hr_qp->mutex);
cur_state = attr_mask & IB_QP_CUR_STATE ?
attr->cur_qp_state : (enum ib_qp_state)hr_qp->state;
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
if (ibqp->uobject &&
(attr_mask & IB_QP_STATE) && new_state == IB_QPS_ERR) {
if (hr_qp->sdb_en == 1) {
hr_qp->sq.head = *(int *)(hr_qp->sdb.virt_addr);
if (hr_qp->rdb_en == 1)
hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
} else {
ibdev_warn(&hr_dev->ib_dev,
"flush cqe is not supported in userspace!\n");
goto out;
}
}
if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
attr_mask)) {
ibdev_err(&hr_dev->ib_dev, "ib_modify_qp_is_ok failed\n");
goto out;
}
ret = hns_roce_check_qp_attr(ibqp, attr, attr_mask);
if (ret)
goto out;
if (cur_state == new_state && cur_state == IB_QPS_RESET) {
if (hr_dev->caps.min_wqes) {
ret = -EPERM;
ibdev_err(&hr_dev->ib_dev,
"cur_state=%d new_state=%d\n", cur_state,
new_state);
} else {
ret = 0;
}
goto out;
}
ret = hr_dev->hw->modify_qp(ibqp, attr, attr_mask, cur_state,
new_state);
out:
mutex_unlock(&hr_qp->mutex);
return ret;
}
void hns_roce_lock_cqs(struct hns_roce_cq *send_cq, struct hns_roce_cq *recv_cq)
__acquires(&send_cq->lock) __acquires(&recv_cq->lock)
{
if (send_cq == recv_cq) {
spin_lock_irq(&send_cq->lock);
__acquire(&recv_cq->lock);
} else if (send_cq->cqn < recv_cq->cqn) {
spin_lock_irq(&send_cq->lock);
spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
} else {
spin_lock_irq(&recv_cq->lock);
spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
}
}
void hns_roce_unlock_cqs(struct hns_roce_cq *send_cq,
struct hns_roce_cq *recv_cq) __releases(&send_cq->lock)
__releases(&recv_cq->lock)
{
if (send_cq == recv_cq) {
__release(&recv_cq->lock);
spin_unlock_irq(&send_cq->lock);
} else if (send_cq->cqn < recv_cq->cqn) {
spin_unlock(&recv_cq->lock);
spin_unlock_irq(&send_cq->lock);
} else {
spin_unlock(&send_cq->lock);
spin_unlock_irq(&recv_cq->lock);
}
}
static void *get_wqe(struct hns_roce_qp *hr_qp, int offset)
{
return hns_roce_buf_offset(&hr_qp->hr_buf, offset);
}
void *get_recv_wqe(struct hns_roce_qp *hr_qp, int n)
{
return get_wqe(hr_qp, hr_qp->rq.offset + (n << hr_qp->rq.wqe_shift));
}
void *get_send_wqe(struct hns_roce_qp *hr_qp, int n)
{
return get_wqe(hr_qp, hr_qp->sq.offset + (n << hr_qp->sq.wqe_shift));
}
void *get_send_extend_sge(struct hns_roce_qp *hr_qp, int n)
{
return hns_roce_buf_offset(&hr_qp->hr_buf, hr_qp->sge.offset +
(n << hr_qp->sge.sge_shift));
}
bool hns_roce_wq_overflow(struct hns_roce_wq *hr_wq, int nreq,
struct ib_cq *ib_cq)
{
struct hns_roce_cq *hr_cq;
u32 cur;
cur = hr_wq->head - hr_wq->tail;
if (likely(cur + nreq < hr_wq->max_post))
return false;
hr_cq = to_hr_cq(ib_cq);
spin_lock(&hr_cq->lock);
cur = hr_wq->head - hr_wq->tail;
spin_unlock(&hr_cq->lock);
return cur + nreq >= hr_wq->max_post;
}
int hns_roce_init_qp_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_qp_table *qp_table = &hr_dev->qp_table;
int reserved_from_top = 0;
int reserved_from_bot;
int ret;
mutex_init(&qp_table->scc_mutex);
xa_init(&hr_dev->qp_table_xa);
reserved_from_bot = hr_dev->caps.reserved_qps;
ret = hns_roce_bitmap_init(&qp_table->bitmap, hr_dev->caps.num_qps,
hr_dev->caps.num_qps - 1, reserved_from_bot,
reserved_from_top);
if (ret) {
dev_err(hr_dev->dev, "qp bitmap init failed!error=%d\n",
ret);
return ret;
}
return 0;
}
void hns_roce_cleanup_qp_table(struct hns_roce_dev *hr_dev)
{
hns_roce_bitmap_cleanup(&hr_dev->qp_table.bitmap);
}
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