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/*
* 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 <rdma/hns-abi.h>
#include "hns_roce_common.h"
static int hns_roce_alloc_cqc(struct hns_roce_dev *hr_dev,
struct hns_roce_cq *hr_cq)
{
struct hns_roce_cmd_mailbox *mailbox;
struct hns_roce_hem_table *mtt_table;
struct hns_roce_cq_table *cq_table;
struct device *dev = hr_dev->dev;
dma_addr_t dma_handle;
u64 *mtts;
int ret;
cq_table = &hr_dev->cq_table;
/* Get the physical address of cq buf */
if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
mtt_table = &hr_dev->mr_table.mtt_cqe_table;
else
mtt_table = &hr_dev->mr_table.mtt_table;
mtts = hns_roce_table_find(hr_dev, mtt_table, hr_cq->mtt.first_seg,
&dma_handle);
if (!mtts) {
dev_err(dev, "Failed to find mtt for CQ buf.\n");
return -EINVAL;
}
ret = hns_roce_bitmap_alloc(&cq_table->bitmap, &hr_cq->cqn);
if (ret) {
dev_err(dev, "Num of CQ out of range.\n");
return ret;
}
/* Get CQC memory HEM(Hardware Entry Memory) table */
ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn);
if (ret) {
dev_err(dev,
"Get context mem failed(%d) when CQ(0x%lx) alloc.\n",
ret, hr_cq->cqn);
goto err_out;
}
ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL));
if (ret) {
dev_err(dev, "Failed to xa_store CQ.\n");
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) {
dev_err(dev,
"Send cmd mailbox failed(%d) when CQ(0x%lx) alloc.\n",
ret, hr_cq->cqn);
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:
hns_roce_bitmap_free(&cq_table->bitmap, hr_cq->cqn, BITMAP_NO_RR);
return ret;
}
void hns_roce_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);
hns_roce_bitmap_free(&cq_table->bitmap, hr_cq->cqn, BITMAP_NO_RR);
}
static int get_cq_umem(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
struct hns_roce_ib_create_cq ucmd,
struct ib_udata *udata)
{
struct hns_roce_buf *buf = &hr_cq->buf;
struct hns_roce_mtt *mtt = &hr_cq->mtt;
struct ib_umem **umem = &hr_cq->umem;
u32 npages;
int ret;
*umem = ib_umem_get(udata, ucmd.buf_addr, buf->size,
IB_ACCESS_LOCAL_WRITE);
if (IS_ERR(*umem))
return PTR_ERR(*umem);
if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
mtt->mtt_type = MTT_TYPE_CQE;
else
mtt->mtt_type = MTT_TYPE_WQE;
npages = DIV_ROUND_UP(ib_umem_page_count(*umem),
1 << hr_dev->caps.cqe_buf_pg_sz);
ret = hns_roce_mtt_init(hr_dev, npages, buf->page_shift, mtt);
if (ret)
goto err_buf;
ret = hns_roce_ib_umem_write_mtt(hr_dev, mtt, *umem);
if (ret)
goto err_mtt;
return 0;
err_mtt:
hns_roce_mtt_cleanup(hr_dev, mtt);
err_buf:
ib_umem_release(*umem);
return ret;
}
static int alloc_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
struct hns_roce_buf *buf = &hr_cq->buf;
struct hns_roce_mtt *mtt = &hr_cq->mtt;
int ret;
ret = hns_roce_buf_alloc(hr_dev, buf->size, (1 << buf->page_shift) * 2,
buf, buf->page_shift);
if (ret)
goto out;
if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
mtt->mtt_type = MTT_TYPE_CQE;
else
mtt->mtt_type = MTT_TYPE_WQE;
ret = hns_roce_mtt_init(hr_dev, buf->npages, buf->page_shift, mtt);
if (ret)
goto err_buf;
ret = hns_roce_buf_write_mtt(hr_dev, mtt, buf);
if (ret)
goto err_mtt;
return 0;
err_mtt:
hns_roce_mtt_cleanup(hr_dev, mtt);
err_buf:
hns_roce_buf_free(hr_dev, buf->size, buf);
out:
return ret;
}
static void free_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq)
{
hns_roce_buf_free(hr_dev, hr_cq->buf.size, &hr_cq->buf);
}
static int create_user_cq(struct hns_roce_dev *hr_dev,
struct hns_roce_cq *hr_cq,
struct ib_udata *udata,
struct hns_roce_ib_create_cq_resp *resp)
{
struct hns_roce_ib_create_cq ucmd;
struct device *dev = hr_dev->dev;
int ret;
struct hns_roce_ucontext *context = rdma_udata_to_drv_context(
udata, struct hns_roce_ucontext, ibucontext);
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
dev_err(dev, "Failed to copy_from_udata.\n");
return -EFAULT;
}
/* Get user space address, write it into mtt table */
ret = get_cq_umem(hr_dev, hr_cq, ucmd, udata);
if (ret) {
dev_err(dev, "Failed to get_cq_umem.\n");
return ret;
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(*resp))) {
ret = hns_roce_db_map_user(context, udata, ucmd.db_addr,
&hr_cq->db);
if (ret) {
dev_err(dev, "cq record doorbell map failed!\n");
goto err_mtt;
}
hr_cq->db_en = 1;
resp->cap_flags |= HNS_ROCE_SUPPORT_CQ_RECORD_DB;
}
return 0;
err_mtt:
hns_roce_mtt_cleanup(hr_dev, &hr_cq->mtt);
ib_umem_release(hr_cq->umem);
return ret;
}
static int create_kernel_cq(struct hns_roce_dev *hr_dev,
struct hns_roce_cq *hr_cq)
{
struct device *dev = hr_dev->dev;
int ret;
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
ret = hns_roce_alloc_db(hr_dev, &hr_cq->db, 1);
if (ret)
return ret;
hr_cq->set_ci_db = hr_cq->db.db_record;
*hr_cq->set_ci_db = 0;
hr_cq->db_en = 1;
}
/* Init mtt table and write buff address to mtt table */
ret = alloc_cq_buf(hr_dev, hr_cq);
if (ret) {
dev_err(dev, "Failed to alloc_cq_buf.\n");
goto err_db;
}
hr_cq->cq_db_l = hr_dev->reg_base + hr_dev->odb_offset +
DB_REG_OFFSET * hr_dev->priv_uar.index;
return 0;
err_db:
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB)
hns_roce_free_db(hr_dev, &hr_cq->db);
return ret;
}
static void destroy_user_cq(struct hns_roce_dev *hr_dev,
struct hns_roce_cq *hr_cq,
struct ib_udata *udata,
struct hns_roce_ib_create_cq_resp *resp)
{
struct hns_roce_ucontext *context = rdma_udata_to_drv_context(
udata, struct hns_roce_ucontext, ibucontext);
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(*resp)))
hns_roce_db_unmap_user(context, &hr_cq->db);
hns_roce_mtt_cleanup(hr_dev, &hr_cq->mtt);
ib_umem_release(hr_cq->umem);
}
static void destroy_kernel_cq(struct hns_roce_dev *hr_dev,
struct hns_roce_cq *hr_cq)
{
hns_roce_mtt_cleanup(hr_dev, &hr_cq->mtt);
free_cq_buf(hr_dev, hr_cq);
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB)
hns_roce_free_db(hr_dev, &hr_cq->db);
}
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 device *dev = hr_dev->dev;
int vector = attr->comp_vector;
u32 cq_entries = attr->cqe;
int ret;
if (cq_entries < 1 || cq_entries > hr_dev->caps.max_cqes) {
dev_err(dev, "Create CQ failed. entries=%d, max=%d\n",
cq_entries, hr_dev->caps.max_cqes);
return -EINVAL;
}
if (vector >= hr_dev->caps.num_comp_vectors) {
dev_err(dev, "Create CQ failed, vector=%d, max=%d\n",
vector, hr_dev->caps.num_comp_vectors);
return -EINVAL;
}
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;
hr_cq->buf.size = hr_cq->cq_depth * hr_dev->caps.cq_entry_sz;
hr_cq->buf.page_shift = PAGE_SHIFT + hr_dev->caps.cqe_buf_pg_sz;
spin_lock_init(&hr_cq->lock);
if (udata) {
ret = create_user_cq(hr_dev, hr_cq, udata, &resp);
if (ret) {
dev_err(dev, "Create cq failed in user mode!\n");
goto err_cq;
}
} else {
ret = create_kernel_cq(hr_dev, hr_cq);
if (ret) {
dev_err(dev, "Create cq failed in kernel mode!\n");
goto err_cq;
}
}
ret = hns_roce_alloc_cqc(hr_dev, hr_cq);
if (ret) {
dev_err(dev, "Alloc CQ failed(%d).\n", ret);
goto err_dbmap;
}
/*
* 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 initialze 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, sizeof(resp));
if (ret)
goto err_cqc;
}
return 0;
err_cqc:
hns_roce_free_cqc(hr_dev, hr_cq);
err_dbmap:
if (udata)
destroy_user_cq(hr_dev, hr_cq, udata, &resp);
else
destroy_kernel_cq(hr_dev, hr_cq);
err_cq:
return ret;
}
void 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);
return;
}
hns_roce_free_cqc(hr_dev, hr_cq);
hns_roce_mtt_cleanup(hr_dev, &hr_cq->mtt);
ib_umem_release(hr_cq->umem);
if (udata) {
if (hr_cq->db_en == 1)
hns_roce_db_unmap_user(rdma_udata_to_drv_context(
udata,
struct hns_roce_ucontext,
ibucontext),
&hr_cq->db);
} else {
/* Free the buff of stored cq */
free_cq_buf(hr_dev, hr_cq);
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB)
hns_roce_free_db(hr_dev, &hr_cq->db);
}
}
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);
}
int hns_roce_init_cq_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table;
xa_init(&cq_table->array);
return hns_roce_bitmap_init(&cq_table->bitmap, hr_dev->caps.num_cqs,
hr_dev->caps.num_cqs - 1,
hr_dev->caps.reserved_cqs, 0);
}
void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev)
{
hns_roce_bitmap_cleanup(&hr_dev->cq_table.bitmap);
}