swh:1:snp:49cd9498d6cccc5e78252c27dcb645bcf7bf0c91
Tip revision: 62fb9874f5da54fdb243003b386128037319b219 authored by Linus Torvalds on 27 June 2021, 22:21:11 UTC
Linux 5.13
Linux 5.13
Tip revision: 62fb987
hns_roce_cq.c
/*
* Copyright (c) 2016 Hisilicon Limited.
*
* 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/platform_device.h>
#include <rdma/ib_umem.h>
#include <rdma/uverbs_ioctl.h>
#include "hns_roce_device.h"
#include "hns_roce_cmd.h"
#include "hns_roce_hem.h"
#include "hns_roce_common.h"
static u8 get_least_load_bankid_for_cq(struct hns_roce_bank *bank)
{
u32 least_load = bank[0].inuse;
u8 bankid = 0;
u32 bankcnt;
u8 i;
for (i = 1; i < HNS_ROCE_CQ_BANK_NUM; i++) {
bankcnt = bank[i].inuse;
if (bankcnt < least_load) {
least_load = bankcnt;
bankid = i;
}
}
return bankid;
}
static int alloc_cqn(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
struct hns_roce_bank *bank;
u8 bankid;
int id;
mutex_lock(&cq_table->bank_mutex);
bankid = get_least_load_bankid_for_cq(cq_table->bank);
bank = &cq_table->bank[bankid];
id = ida_alloc_range(&bank->ida, bank->min, bank->max, GFP_KERNEL);
if (id < 0) {
mutex_unlock(&cq_table->bank_mutex);
return id;
}
/* the lower 2 bits is bankid */
hr_cq->cqn = (id << CQ_BANKID_SHIFT) | bankid;
bank->inuse++;
mutex_unlock(&cq_table->bank_mutex);
return 0;
}
static inline u8 get_cq_bankid(unsigned long cqn)
{
/* The lower 2 bits of CQN are used to hash to different banks */
return (u8)(cqn & GENMASK(1, 0));
}
static void free_cqn(struct hns_roce_dev *hr_dev, unsigned long cqn)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
struct hns_roce_bank *bank;
bank = &cq_table->bank[get_cq_bankid(cqn)];
ida_free(&bank->ida, cqn >> CQ_BANKID_SHIFT);
mutex_lock(&cq_table->bank_mutex);
bank->inuse--;
mutex_unlock(&cq_table->bank_mutex);
}
static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_cmd_mailbox *mailbox;
u64 mtts[MTT_MIN_COUNT] = { 0 };
dma_addr_t dma_handle;
int ret;
ret = hns_roce_mtr_find(hr_dev, &hr_cq->mtr, 0, mtts, ARRAY_SIZE(mtts),
&dma_handle);
if (!ret) {
ibdev_err(ibdev, "failed to find CQ mtr, ret = %d.\n", ret);
return -EINVAL;
}
/* Get CQC memory HEM(Hardware Entry Memory) table */
ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn);
if (ret) {
ibdev_err(ibdev, "failed to get CQ(0x%lx) context, ret = %d.\n",
hr_cq->cqn, ret);
goto err_out;
}
ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));
if (ret) {
ibdev_err(ibdev, "failed to xa_store CQ, ret = %d.\n", ret);
goto err_put;
}
/* Allocate mailbox memory */
mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
if (IS_ERR(mailbox)) {
ret = PTR_ERR(mailbox);
goto err_xa;
}
hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle);
/* Send mailbox to hw */
ret = hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, hr_cq->cqn, 0,
HNS_ROCE_CMD_CREATE_CQC, HNS_ROCE_CMD_TIMEOUT_MSECS);
hns_roce_free_cmd_mailbox(hr_dev, mailbox);
if (ret) {
ibdev_err(ibdev,
"failed to send create cmd for CQ(0x%lx), ret = %d.\n",
hr_cq->cqn, ret);
goto err_xa;
}
hr_cq->cons_index = 0;
hr_cq->arm_sn = 1;
atomic_set(&hr_cq->refcount, 1);
init_completion(&hr_cq->free);
return 0;
err_xa:
xa_erase(&cq_table->array, hr_cq->cqn);
err_put:
hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
err_out:
return ret;
}
static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
struct device *dev = hr_dev->dev;
int ret;
ret = hns_roce_cmd_mbox(hr_dev, 0, 0, hr_cq->cqn, 1,
HNS_ROCE_CMD_DESTROY_CQC,
HNS_ROCE_CMD_TIMEOUT_MSECS);
if (ret)
dev_err(dev, "DESTROY_CQ failed (%d) for CQN %06lx\n", ret,
hr_cq->cqn);
xa_erase(&cq_table->array, hr_cq->cqn);
/* Waiting interrupt process procedure carried out */
synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq);
/* wait for all interrupt processed */
if (atomic_dec_and_test(&hr_cq->refcount))
complete(&hr_cq->free);
wait_for_completion(&hr_cq->free);
hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn);
}
static int alloc_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
struct ib_udata *udata, unsigned long addr)
{
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_buf_attr buf_attr = {};
int ret;
buf_attr.page_shift = hr_dev->caps.cqe_buf_pg_sz + HNS_HW_PAGE_SHIFT;
buf_attr.region[0].size = hr_cq->cq_depth * hr_cq->cqe_size;
buf_attr.region[0].hopnum = hr_dev->caps.cqe_hop_num;
buf_attr.region_count = 1;
ret = hns_roce_mtr_create(hr_dev, &hr_cq->mtr, &buf_attr,
hr_dev->caps.cqe_ba_pg_sz + HNS_HW_PAGE_SHIFT,
udata, addr);
if (ret)
ibdev_err(ibdev, "failed to alloc CQ mtr, ret = %d.\n", ret);
return ret;
}
static void free_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
hns_roce_mtr_destroy(hr_dev, &hr_cq->mtr);
}
static int alloc_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
struct ib_udata *udata, unsigned long addr,
struct hns_roce_ib_create_cq_resp *resp)
{
bool has_db = hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_CQ_RECORD_DB;
struct hns_roce_ucontext *uctx;
int err;
if (udata) {
if (has_db &&
udata->outlen >= offsetofend(typeof(*resp), cap_flags)) {
uctx = rdma_udata_to_drv_context(udata,
struct hns_roce_ucontext, ibucontext);
err = hns_roce_db_map_user(uctx, udata, addr,
&hr_cq->db);
if (err)
return err;
hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
resp->cap_flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
}
} else {
if (has_db) {
err = hns_roce_alloc_db(hr_dev, &hr_cq->db, 1);
if (err)
return err;
hr_cq->set_ci_db = hr_cq->db.db_record;
*hr_cq->set_ci_db = 0;
hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
}
hr_cq->db_reg = hr_dev->reg_base + hr_dev->odb_offset +
DB_REG_OFFSET * hr_dev->priv_uar.index;
}
return 0;
}
static void free_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
struct ib_udata *udata)
{
struct hns_roce_ucontext *uctx;
if (!(hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB))
return;
hr_cq->flags &= ~HNS_ROCE_CQ_FLAG_RECORD_DB;
if (udata) {
uctx = rdma_udata_to_drv_context(udata,
struct hns_roce_ucontext,
ibucontext);
hns_roce_db_unmap_user(uctx, &hr_cq->db);
} else {
hns_roce_free_db(hr_dev, &hr_cq->db);
}
}
static int verify_cq_create_attr(struct hns_roce_dev *hr_dev,
const struct ib_cq_init_attr *attr)
{
struct ib_device *ibdev = &hr_dev->ib_dev;
if (!attr->cqe || attr->cqe > hr_dev->caps.max_cqes) {
ibdev_err(ibdev, "failed to check CQ count %u, max = %u.\n",
attr->cqe, hr_dev->caps.max_cqes);
return -EINVAL;
}
if (attr->comp_vector >= hr_dev->caps.num_comp_vectors) {
ibdev_err(ibdev, "failed to check CQ vector = %u, max = %d.\n",
attr->comp_vector, hr_dev->caps.num_comp_vectors);
return -EINVAL;
}
return 0;
}
static int get_cq_ucmd(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
struct hns_roce_ib_create_cq *ucmd)
{
struct ib_device *ibdev = hr_cq->ib_cq.device;
int ret;
ret = ib_copy_from_udata(ucmd, udata, min(udata->inlen, sizeof(*ucmd)));
if (ret) {
ibdev_err(ibdev, "failed to copy CQ udata, ret = %d.\n", ret);
return ret;
}
return 0;
}
static void set_cq_param(struct hns_roce_cq *hr_cq, u32 cq_entries, int vector,
struct hns_roce_ib_create_cq *ucmd)
{
struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
cq_entries = max(cq_entries, hr_dev->caps.min_cqes);
cq_entries = roundup_pow_of_two(cq_entries);
hr_cq->ib_cq.cqe = cq_entries - 1; /* used as cqe index */
hr_cq->cq_depth = cq_entries;
hr_cq->vector = vector;
spin_lock_init(&hr_cq->lock);
INIT_LIST_HEAD(&hr_cq->sq_list);
INIT_LIST_HEAD(&hr_cq->rq_list);
}
static void set_cqe_size(struct hns_roce_cq *hr_cq, struct ib_udata *udata,
struct hns_roce_ib_create_cq *ucmd)
{
struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device);
if (udata) {
if (udata->inlen >= offsetofend(typeof(*ucmd), cqe_size))
hr_cq->cqe_size = ucmd->cqe_size;
else
hr_cq->cqe_size = HNS_ROCE_V2_CQE_SIZE;
} else {
hr_cq->cqe_size = hr_dev->caps.cqe_sz;
}
}
int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr,
struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
struct hns_roce_ib_create_cq_resp resp = {};
struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_ib_create_cq ucmd = {};
int ret;
if (attr->flags)
return -EOPNOTSUPP;
ret = verify_cq_create_attr(hr_dev, attr);
if (ret)
return ret;
if (udata) {
ret = get_cq_ucmd(hr_cq, udata, &ucmd);
if (ret)
return ret;
}
set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd);
set_cqe_size(hr_cq, udata, &ucmd);
ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr);
if (ret) {
ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret);
return ret;
}
ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp);
if (ret) {
ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret);
goto err_cq_buf;
}
ret = alloc_cqn(hr_dev, hr_cq);
if (ret) {
ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret);
goto err_cq_db;
}
ret = alloc_cqc(hr_dev, hr_cq);
if (ret) {
ibdev_err(ibdev,
"failed to alloc CQ context, ret = %d.\n", ret);
goto err_cqn;
}
/*
* For the QP created by kernel space, tptr value should be initialized
* to zero; For the QP created by user space, it will cause synchronous
* problems if tptr is set to zero here, so we initialize it in user
* space.
*/
if (!udata && hr_cq->tptr_addr)
*hr_cq->tptr_addr = 0;
if (udata) {
resp.cqn = hr_cq->cqn;
ret = ib_copy_to_udata(udata, &resp,
min(udata->outlen, sizeof(resp)));
if (ret)
goto err_cqc;
}
return 0;
err_cqc:
free_cqc(hr_dev, hr_cq);
err_cqn:
free_cqn(hr_dev, hr_cq->cqn);
err_cq_db:
free_cq_db(hr_dev, hr_cq, udata);
err_cq_buf:
free_cq_buf(hr_dev, hr_cq);
return ret;
}
int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
if (hr_dev->hw->destroy_cq)
hr_dev->hw->destroy_cq(ib_cq, udata);
free_cqc(hr_dev, hr_cq);
free_cqn(hr_dev, hr_cq->cqn);
free_cq_db(hr_dev, hr_cq, udata);
free_cq_buf(hr_dev, hr_cq);
return 0;
}
void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
{
struct hns_roce_cq *hr_cq;
struct ib_cq *ibcq;
hr_cq = xa_load(&hr_dev->cq_table.array,
cqn & (hr_dev->caps.num_cqs - 1));
if (!hr_cq) {
dev_warn(hr_dev->dev, "Completion event for bogus CQ 0x%06x\n",
cqn);
return;
}
++hr_cq->arm_sn;
ibcq = &hr_cq->ib_cq;
if (ibcq->comp_handler)
ibcq->comp_handler(ibcq, ibcq->cq_context);
}
void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type)
{
struct device *dev = hr_dev->dev;
struct hns_roce_cq *hr_cq;
struct ib_event event;
struct ib_cq *ibcq;
hr_cq = xa_load(&hr_dev->cq_table.array,
cqn & (hr_dev->caps.num_cqs - 1));
if (!hr_cq) {
dev_warn(dev, "Async event for bogus CQ 0x%06x\n", cqn);
return;
}
if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID &&
event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR &&
event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) {
dev_err(dev, "Unexpected event type 0x%x on CQ 0x%06x\n",
event_type, cqn);
return;
}
atomic_inc(&hr_cq->refcount);
ibcq = &hr_cq->ib_cq;
if (ibcq->event_handler) {
event.device = ibcq->device;
event.element.cq = ibcq;
event.event = IB_EVENT_CQ_ERR;
ibcq->event_handler(&event, ibcq->cq_context);
}
if (atomic_dec_and_test(&hr_cq->refcount))
complete(&hr_cq->free);
}
void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
unsigned int reserved_from_bot;
unsigned int i;
mutex_init(&cq_table->bank_mutex);
xa_init(&cq_table->array);
reserved_from_bot = hr_dev->caps.reserved_cqs;
for (i = 0; i < reserved_from_bot; i++) {
cq_table->bank[get_cq_bankid(i)].inuse++;
cq_table->bank[get_cq_bankid(i)].min++;
}
for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) {
ida_init(&cq_table->bank[i].ida);
cq_table->bank[i].max = hr_dev->caps.num_cqs /
HNS_ROCE_CQ_BANK_NUM - 1;
}
}
void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev)
{
int i;
for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++)
ida_destroy(&hr_dev->cq_table.bank[i].ida);
}