Orange Pi5 kernel

/*
 * 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/platform_device.h>
#include <linux/vmalloc.h>
#include <rdma/ib_umem.h>
#include "hns_roce_device.h"
#include "hns_roce_cmd.h"
#include "hns_roce_hem.h"
 
static u32 hw_index_to_key(unsigned long ind)
{
<------>return (u32)(ind >> 24) | (ind << 8);
}
 
unsigned long key_to_hw_index(u32 key)
{
<------>return (key << 24) | (key >> 8);
}
 
static int hns_roce_hw_create_mpt(struct hns_roce_dev *hr_dev,
<------><------><------><------>  struct hns_roce_cmd_mailbox *mailbox,
<------><------><------><------>  unsigned long mpt_index)
{
<------>return hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, mpt_index, 0,
<------><------><------><------> HNS_ROCE_CMD_CREATE_MPT,
<------><------><------><------> HNS_ROCE_CMD_TIMEOUT_MSECS);
}
 
int hns_roce_hw_destroy_mpt(struct hns_roce_dev *hr_dev,
<------><------><------>    struct hns_roce_cmd_mailbox *mailbox,
<------><------><------>    unsigned long mpt_index)
{
<------>return hns_roce_cmd_mbox(hr_dev, 0, mailbox ? mailbox->dma : 0,
<------><------><------><------> mpt_index, !mailbox, HNS_ROCE_CMD_DESTROY_MPT,
<------><------><------><------> HNS_ROCE_CMD_TIMEOUT_MSECS);
}
 
static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
<------><------><------>u32 pd, u64 iova, u64 size, u32 access)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>unsigned long obj = 0;
<------>int err;
 
<------>/* Allocate a key for mr from mr_table */
<------>err = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &obj);
<------>if (err) {
<------><------>ibdev_err(ibdev,
<------><------><------>  "failed to alloc bitmap for MR key, ret = %d.\n",
<------><------><------>  err);
<------><------>return -ENOMEM;
<------>}
 
<------>mr->iova = iova;			/* MR va starting addr */
<------>mr->size = size;			/* MR addr range */
<------>mr->pd = pd;				/* MR num */
<------>mr->access = access;			/* MR access permit */
<------>mr->enabled = 0;			/* MR active status */
<------>mr->key = hw_index_to_key(obj);		/* MR key */
 
<------>err = hns_roce_table_get(hr_dev, &hr_dev->mr_table.mtpt_table, obj);
<------>if (err) {
<------><------>ibdev_err(ibdev, "failed to alloc mtpt, ret = %d.\n", err);
<------><------>goto err_free_bitmap;
<------>}
 
<------>return 0;
err_free_bitmap:
<------>hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR);
<------>return err;
}
 
static void free_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
{
<------>unsigned long obj = key_to_hw_index(mr->key);
 
<------>hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, obj);
<------>hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap, obj, BITMAP_NO_RR);
}
 
static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
<------><------><------>size_t length, struct ib_udata *udata, u64 start,
<------><------><------>int access)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>bool is_fast = mr->type == MR_TYPE_FRMR;
<------>struct hns_roce_buf_attr buf_attr = {};
<------>int err;
 
<------>mr->pbl_hop_num = is_fast ? 1 : hr_dev->caps.pbl_hop_num;
<------>buf_attr.page_shift = is_fast ? PAGE_SHIFT :
<------><------><------>      hr_dev->caps.pbl_buf_pg_sz + PAGE_SHIFT;
<------>buf_attr.region[0].size = length;
<------>buf_attr.region[0].hopnum = mr->pbl_hop_num;
<------>buf_attr.region_count = 1;
<------>buf_attr.fixed_page = true;
<------>buf_attr.user_access = access;
<------>/* fast MR's buffer is alloced before mapping, not at creation */
<------>buf_attr.mtt_only = is_fast;
 
<------>err = hns_roce_mtr_create(hr_dev, &mr->pbl_mtr, &buf_attr,
<------><------><------><------>  hr_dev->caps.pbl_ba_pg_sz + HNS_HW_PAGE_SHIFT,
<------><------><------><------>  udata, start);
<------>if (err)
<------><------>ibdev_err(ibdev, "failed to alloc pbl mtr, ret = %d.\n", err);
<------>else
<------><------>mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count;
 
<------>return err;
}
 
static void free_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
{
<------>hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr);
}
 
static void hns_roce_mr_free(struct hns_roce_dev *hr_dev,
<------><------><------>     struct hns_roce_mr *mr)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>int ret;
 
<------>if (mr->enabled) {
<------><------>ret = hns_roce_hw_destroy_mpt(hr_dev, NULL,
<------><------><------><------><------>      key_to_hw_index(mr->key) &
<------><------><------><------><------>      (hr_dev->caps.num_mtpts - 1));
<------><------>if (ret)
<------><------><------>ibdev_warn(ibdev, "failed to destroy mpt, ret = %d.\n",
<------><------><------><------>   ret);
<------>}
 
<------>free_mr_pbl(hr_dev, mr);
<------>free_mr_key(hr_dev, mr);
}
 
static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev,
<------><------><------>      struct hns_roce_mr *mr)
{
<------>int ret;
<------>unsigned long mtpt_idx = key_to_hw_index(mr->key);
<------>struct device *dev = hr_dev->dev;
<------>struct hns_roce_cmd_mailbox *mailbox;
 
<------>/* Allocate mailbox memory */
<------>mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
<------>if (IS_ERR(mailbox)) {
<------><------>ret = PTR_ERR(mailbox);
<------><------>return ret;
<------>}
 
<------>if (mr->type != MR_TYPE_FRMR)
<------><------>ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr,
<------><------><------><------><------>     mtpt_idx);
<------>else
<------><------>ret = hr_dev->hw->frmr_write_mtpt(hr_dev, mailbox->buf, mr);
<------>if (ret) {
<------><------>dev_err(dev, "failed to write mtpt, ret = %d.\n", ret);
<------><------>goto err_page;
<------>}
 
<------>ret = hns_roce_hw_create_mpt(hr_dev, mailbox,
<------><------><------><------>     mtpt_idx & (hr_dev->caps.num_mtpts - 1));
<------>if (ret) {
<------><------>dev_err(dev, "failed to create mpt, ret = %d.\n", ret);
<------><------>goto err_page;
<------>}
 
<------>mr->enabled = 1;
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
<------>return 0;
 
err_page:
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
<------>return ret;
}
 
int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev)
{
<------>struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
<------>int ret;
 
<------>ret = hns_roce_bitmap_init(&mr_table->mtpt_bitmap,
<------><------><------><------>   hr_dev->caps.num_mtpts,
<------><------><------><------>   hr_dev->caps.num_mtpts - 1,
<------><------><------><------>   hr_dev->caps.reserved_mrws, 0);
<------>return ret;
}
 
void hns_roce_cleanup_mr_table(struct hns_roce_dev *hr_dev)
{
<------>struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
 
<------>hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap);
}
 
struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
<------>struct hns_roce_mr *mr;
<------>int ret;
 
<------>mr = kzalloc(sizeof(*mr), GFP_KERNEL);
<------>if (mr == NULL)
<------><------>return  ERR_PTR(-ENOMEM);
 
<------>mr->type = MR_TYPE_DMA;
 
<------>/* Allocate memory region key */
<------>hns_roce_hem_list_init(&mr->pbl_mtr.hem_list);
<------>ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, 0, acc);
<------>if (ret)
<------><------>goto err_free;
 
<------>ret = hns_roce_mr_enable(to_hr_dev(pd->device), mr);
<------>if (ret)
<------><------>goto err_mr;
 
<------>mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
 
<------>return &mr->ibmr;
err_mr:
<------>free_mr_key(hr_dev, mr);
 
err_free:
<------>kfree(mr);
<------>return ERR_PTR(ret);
}
 
struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
<------><------><------><------>   u64 virt_addr, int access_flags,
<------><------><------><------>   struct ib_udata *udata)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
<------>struct hns_roce_mr *mr;
<------>int ret;
 
<------>mr = kzalloc(sizeof(*mr), GFP_KERNEL);
<------>if (!mr)
<------><------>return ERR_PTR(-ENOMEM);
 
<------>mr->type = MR_TYPE_MR;
<------>ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, virt_addr, length,
<------><------><------>   access_flags);
<------>if (ret)
<------><------>goto err_alloc_mr;
 
<------>ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, access_flags);
<------>if (ret)
<------><------>goto err_alloc_key;
 
<------>ret = hns_roce_mr_enable(hr_dev, mr);
<------>if (ret)
<------><------>goto err_alloc_pbl;
 
<------>mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
<------>mr->ibmr.length = length;
 
<------>return &mr->ibmr;
 
err_alloc_pbl:
<------>free_mr_pbl(hr_dev, mr);
err_alloc_key:
<------>free_mr_key(hr_dev, mr);
err_alloc_mr:
<------>kfree(mr);
<------>return ERR_PTR(ret);
}
 
static int rereg_mr_trans(struct ib_mr *ibmr, int flags,
<------><------><------>  u64 start, u64 length,
<------><------><------>  u64 virt_addr, int mr_access_flags,
<------><------><------>  struct hns_roce_cmd_mailbox *mailbox,
<------><------><------>  u32 pdn, struct ib_udata *udata)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>struct hns_roce_mr *mr = to_hr_mr(ibmr);
<------>int ret;
 
<------>free_mr_pbl(hr_dev, mr);
<------>ret = alloc_mr_pbl(hr_dev, mr, length, udata, start, mr_access_flags);
<------>if (ret) {
<------><------>ibdev_err(ibdev, "failed to create mr PBL, ret = %d.\n", ret);
<------><------>return ret;
<------>}
 
<------>ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn,
<------><------><------><------><------>   mr_access_flags, virt_addr,
<------><------><------><------><------>   length, mailbox->buf);
<------>if (ret) {
<------><------>ibdev_err(ibdev, "failed to write mtpt, ret = %d.\n", ret);
<------><------>free_mr_pbl(hr_dev, mr);
<------>}
 
<------>return ret;
}
 
int hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start, u64 length,
<------><------><------>   u64 virt_addr, int mr_access_flags, struct ib_pd *pd,
<------><------><------>   struct ib_udata *udata)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
<------>struct ib_device *ib_dev = &hr_dev->ib_dev;
<------>struct hns_roce_mr *mr = to_hr_mr(ibmr);
<------>struct hns_roce_cmd_mailbox *mailbox;
<------>unsigned long mtpt_idx;
<------>u32 pdn = 0;
<------>int ret;
 
<------>if (!mr->enabled)
<------><------>return -EINVAL;
 
<------>mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
<------>if (IS_ERR(mailbox))
<------><------>return PTR_ERR(mailbox);
 
<------>mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1);
<------>ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, mtpt_idx, 0,
<------><------><------><------>HNS_ROCE_CMD_QUERY_MPT,
<------><------><------><------>HNS_ROCE_CMD_TIMEOUT_MSECS);
<------>if (ret)
<------><------>goto free_cmd_mbox;
 
<------>ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, mtpt_idx);
<------>if (ret)
<------><------>ibdev_warn(ib_dev, "failed to destroy MPT, ret = %d.\n", ret);
 
<------>mr->enabled = 0;
 
<------>if (flags & IB_MR_REREG_PD)
<------><------>pdn = to_hr_pd(pd)->pdn;
 
<------>if (flags & IB_MR_REREG_TRANS) {
<------><------>ret = rereg_mr_trans(ibmr, flags,
<------><------><------><------>     start, length,
<------><------><------><------>     virt_addr, mr_access_flags,
<------><------><------><------>     mailbox, pdn, udata);
<------><------>if (ret)
<------><------><------>goto free_cmd_mbox;
<------>} else {
<------><------>ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn,
<------><------><------><------><------><------>   mr_access_flags, virt_addr,
<------><------><------><------><------><------>   length, mailbox->buf);
<------><------>if (ret)
<------><------><------>goto free_cmd_mbox;
<------>}
 
<------>ret = hns_roce_hw_create_mpt(hr_dev, mailbox, mtpt_idx);
<------>if (ret) {
<------><------>ibdev_err(ib_dev, "failed to create MPT, ret = %d.\n", ret);
<------><------>goto free_cmd_mbox;
<------>}
 
<------>mr->enabled = 1;
<------>if (flags & IB_MR_REREG_ACCESS)
<------><------>mr->access = mr_access_flags;
 
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
<------>return 0;
 
free_cmd_mbox:
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
<------>return ret;
}
 
int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
<------>struct hns_roce_mr *mr = to_hr_mr(ibmr);
<------>int ret = 0;
 
<------>if (hr_dev->hw->dereg_mr) {
<------><------>ret = hr_dev->hw->dereg_mr(hr_dev, mr, udata);
<------>} else {
<------><------>hns_roce_mr_free(hr_dev, mr);
<------><------>kfree(mr);
<------>}
 
<------>return ret;
}
 
struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
<------><------><------><------>u32 max_num_sg)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
<------>struct device *dev = hr_dev->dev;
<------>struct hns_roce_mr *mr;
<------>u64 length;
<------>int ret;
 
<------>if (mr_type != IB_MR_TYPE_MEM_REG)
<------><------>return ERR_PTR(-EINVAL);
 
<------>if (max_num_sg > HNS_ROCE_FRMR_MAX_PA) {
<------><------>dev_err(dev, "max_num_sg larger than %d\n",
<------><------><------>HNS_ROCE_FRMR_MAX_PA);
<------><------>return ERR_PTR(-EINVAL);
<------>}
 
<------>mr = kzalloc(sizeof(*mr), GFP_KERNEL);
<------>if (!mr)
<------><------>return ERR_PTR(-ENOMEM);
 
<------>mr->type = MR_TYPE_FRMR;
 
<------>/* Allocate memory region key */
<------>length = max_num_sg * (1 << PAGE_SHIFT);
<------>ret = alloc_mr_key(hr_dev, mr, to_hr_pd(pd)->pdn, 0, length, 0);
<------>if (ret)
<------><------>goto err_free;
 
<------>ret = alloc_mr_pbl(hr_dev, mr, length, NULL, 0, 0);
<------>if (ret)
<------><------>goto err_key;
 
<------>ret = hns_roce_mr_enable(hr_dev, mr);
<------>if (ret)
<------><------>goto err_pbl;
 
<------>mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
<------>mr->ibmr.length = length;
 
<------>return &mr->ibmr;
 
err_key:
<------>free_mr_key(hr_dev, mr);
err_pbl:
<------>free_mr_pbl(hr_dev, mr);
err_free:
<------>kfree(mr);
<------>return ERR_PTR(ret);
}
 
static int hns_roce_set_page(struct ib_mr *ibmr, u64 addr)
{
<------>struct hns_roce_mr *mr = to_hr_mr(ibmr);
 
<------>if (likely(mr->npages < mr->pbl_mtr.hem_cfg.buf_pg_count)) {
<------><------>mr->page_list[mr->npages++] = addr;
<------><------>return 0;
<------>}
 
<------>return -ENOBUFS;
}
 
int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
<------><------>       unsigned int *sg_offset)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>struct hns_roce_mr *mr = to_hr_mr(ibmr);
<------>struct hns_roce_mtr *mtr = &mr->pbl_mtr;
<------>int ret = 0;
 
<------>mr->npages = 0;
<------>mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count,
<------><------><------><------> sizeof(dma_addr_t), GFP_KERNEL);
<------>if (!mr->page_list)
<------><------>return ret;
 
<------>ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page);
<------>if (ret < 1) {
<------><------>ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n",
<------><------><------>  mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret);
<------><------>goto err_page_list;
<------>}
 
<------>mtr->hem_cfg.region[0].offset = 0;
<------>mtr->hem_cfg.region[0].count = mr->npages;
<------>mtr->hem_cfg.region[0].hopnum = mr->pbl_hop_num;
<------>mtr->hem_cfg.region_count = 1;
<------>ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages);
<------>if (ret) {
<------><------>ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret);
<------><------>ret = 0;
<------>} else {
<------><------>mr->pbl_mtr.hem_cfg.buf_pg_shift = ilog2(ibmr->page_size);
<------><------>ret = mr->npages;
<------>}
 
err_page_list:
<------>kvfree(mr->page_list);
<------>mr->page_list = NULL;
 
<------>return ret;
}
 
static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,
<------><------><------>     struct hns_roce_mw *mw)
{
<------>struct device *dev = hr_dev->dev;
<------>int ret;
 
<------>if (mw->enabled) {
<------><------>ret = hns_roce_hw_destroy_mpt(hr_dev, NULL,
<------><------><------><------><------>      key_to_hw_index(mw->rkey) &
<------><------><------><------><------>      (hr_dev->caps.num_mtpts - 1));
<------><------>if (ret)
<------><------><------>dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret);
 
<------><------>hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table,
<------><------><------><------>   key_to_hw_index(mw->rkey));
<------>}
 
<------>hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap,
<------><------><------>     key_to_hw_index(mw->rkey), BITMAP_NO_RR);
}
 
static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev,
<------><------><------>      struct hns_roce_mw *mw)
{
<------>struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
<------>struct hns_roce_cmd_mailbox *mailbox;
<------>struct device *dev = hr_dev->dev;
<------>unsigned long mtpt_idx = key_to_hw_index(mw->rkey);
<------>int ret;
 
<------>/* prepare HEM entry memory */
<------>ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx);
<------>if (ret)
<------><------>return ret;
 
<------>mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
<------>if (IS_ERR(mailbox)) {
<------><------>ret = PTR_ERR(mailbox);
<------><------>goto err_table;
<------>}
 
<------>ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw);
<------>if (ret) {
<------><------>dev_err(dev, "MW write mtpt fail!\n");
<------><------>goto err_page;
<------>}
 
<------>ret = hns_roce_hw_create_mpt(hr_dev, mailbox,
<------><------><------><------>     mtpt_idx & (hr_dev->caps.num_mtpts - 1));
<------>if (ret) {
<------><------>dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret);
<------><------>goto err_page;
<------>}
 
<------>mw->enabled = 1;
 
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
<------>return 0;
 
err_page:
<------>hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
err_table:
<------>hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx);
 
<------>return ret;
}
 
int hns_roce_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
<------>struct hns_roce_mw *mw = to_hr_mw(ibmw);
<------>unsigned long index = 0;
<------>int ret;
 
<------>/* Allocate a key for mw from bitmap */
<------>ret = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &index);
<------>if (ret)
<------><------>return ret;
 
<------>mw->rkey = hw_index_to_key(index);
 
<------>ibmw->rkey = mw->rkey;
<------>mw->pdn = to_hr_pd(ibmw->pd)->pdn;
<------>mw->pbl_hop_num = hr_dev->caps.pbl_hop_num;
<------>mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
<------>mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
 
<------>ret = hns_roce_mw_enable(hr_dev, mw);
<------>if (ret)
<------><------>goto err_mw;
 
<------>return 0;
 
err_mw:
<------>hns_roce_mw_free(hr_dev, mw);
<------>return ret;
}
 
int hns_roce_dealloc_mw(struct ib_mw *ibmw)
{
<------>struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
<------>struct hns_roce_mw *mw = to_hr_mw(ibmw);
 
<------>hns_roce_mw_free(hr_dev, mw);
<------>return 0;
}
 
static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------><------>  dma_addr_t *pages, struct hns_roce_buf_region *region)
{
<------>__le64 *mtts;
<------>int offset;
<------>int count;
<------>int npage;
<------>u64 addr;
<------>int end;
<------>int i;
 
<------>/* if hopnum is 0, buffer cannot store BAs, so skip write mtt */
<------>if (!region->hopnum)
<------><------>return 0;
 
<------>offset = region->offset;
<------>end = offset + region->count;
<------>npage = 0;
<------>while (offset < end) {
<------><------>mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
<------><------><------><------><------><------>  offset, &count, NULL);
<------><------>if (!mtts)
<------><------><------>return -ENOBUFS;
 
<------><------>for (i = 0; i < count; i++) {
<------><------><------>if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
<------><------><------><------>addr = to_hr_hw_page_addr(pages[npage]);
<------><------><------>else
<------><------><------><------>addr = pages[npage];
 
<------><------><------>mtts[i] = cpu_to_le64(addr);
<------><------><------>npage++;
<------><------>}
<------><------>offset += count;
<------>}
 
<------>return 0;
}
 
static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr)
{
<------>int i;
 
<------>for (i = 0; i < attr->region_count; i++)
<------><------>if (attr->region[i].hopnum != HNS_ROCE_HOP_NUM_0 &&
<------><------>    attr->region[i].hopnum > 0)
<------><------><------>return true;
 
<------>/* because the mtr only one root base address, when hopnum is 0 means
<------> * root base address equals the first buffer address, thus all alloced
<------> * memory must in a continuous space accessed by direct mode.
<------> */
<------>return false;
}
 
static inline size_t mtr_bufs_size(struct hns_roce_buf_attr *attr)
{
<------>size_t size = 0;
<------>int i;
 
<------>for (i = 0; i < attr->region_count; i++)
<------><------>size += attr->region[i].size;
 
<------>return size;
}
 
static inline size_t mtr_kmem_direct_size(bool is_direct, size_t alloc_size,
<------><------><------><------><------>  unsigned int page_shift)
{
<------>if (is_direct)
<------><------>return ALIGN(alloc_size, 1 << page_shift);
<------>else
<------><------>return HNS_HW_DIRECT_PAGE_COUNT << page_shift;
}
 
/*
 * check the given pages in continuous address space
 * Returns 0 on success, or the error page num.
 */
static inline int mtr_check_direct_pages(dma_addr_t *pages, int page_count,
<------><------><------><------><------> unsigned int page_shift)
{
<------>size_t page_size = 1 << page_shift;
<------>int i;
 
<------>for (i = 1; i < page_count; i++)
<------><------>if (pages[i] - pages[i - 1] != page_size)
<------><------><------>return i;
 
<------>return 0;
}
 
static void mtr_free_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
{
<------>/* release user buffers */
<------>if (mtr->umem) {
<------><------>ib_umem_release(mtr->umem);
<------><------>mtr->umem = NULL;
<------>}
 
<------>/* release kernel buffers */
<------>if (mtr->kmem) {
<------><------>hns_roce_buf_free(hr_dev, mtr->kmem);
<------><------>kfree(mtr->kmem);
<------><------>mtr->kmem = NULL;
<------>}
}
 
static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------><------>  struct hns_roce_buf_attr *buf_attr, bool is_direct,
<------><------><------>  struct ib_udata *udata, unsigned long user_addr)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>unsigned int best_pg_shift;
<------>int all_pg_count = 0;
<------>size_t direct_size;
<------>size_t total_size;
<------>int ret;
 
<------>total_size = mtr_bufs_size(buf_attr);
<------>if (total_size < 1) {
<------><------>ibdev_err(ibdev, "Failed to check mtr size\n");
<------><------>return -EINVAL;
<------>}
 
<------>if (udata) {
<------><------>unsigned long pgsz_bitmap;
<------><------>unsigned long page_size;
 
<------><------>mtr->kmem = NULL;
<------><------>mtr->umem = ib_umem_get(ibdev, user_addr, total_size,
<------><------><------><------><------>buf_attr->user_access);
<------><------>if (IS_ERR_OR_NULL(mtr->umem)) {
<------><------><------>ibdev_err(ibdev, "Failed to get umem, ret %ld\n",
<------><------><------><------>  PTR_ERR(mtr->umem));
<------><------><------>return -ENOMEM;
<------><------>}
<------><------>if (buf_attr->fixed_page)
<------><------><------>pgsz_bitmap = 1 << buf_attr->page_shift;
<------><------>else
<------><------><------>pgsz_bitmap = GENMASK(buf_attr->page_shift, PAGE_SHIFT);
 
<------><------>page_size = ib_umem_find_best_pgsz(mtr->umem, pgsz_bitmap,
<------><------><------><------><------><------>   user_addr);
<------><------>if (!page_size)
<------><------><------>return -EINVAL;
<------><------>best_pg_shift = order_base_2(page_size);
<------><------>all_pg_count = ib_umem_num_dma_blocks(mtr->umem, page_size);
<------><------>ret = 0;
<------>} else {
<------><------>mtr->umem = NULL;
<------><------>mtr->kmem = kzalloc(sizeof(*mtr->kmem), GFP_KERNEL);
<------><------>if (!mtr->kmem) {
<------><------><------>ibdev_err(ibdev, "Failed to alloc kmem\n");
<------><------><------>return -ENOMEM;
<------><------>}
<------><------>direct_size = mtr_kmem_direct_size(is_direct, total_size,
<------><------><------><------><------><------>   buf_attr->page_shift);
<------><------>ret = hns_roce_buf_alloc(hr_dev, total_size, direct_size,
<------><------><------><------><------> mtr->kmem, buf_attr->page_shift);
<------><------>if (ret) {
<------><------><------>ibdev_err(ibdev, "Failed to alloc kmem, ret %d\n", ret);
<------><------><------>goto err_alloc_mem;
<------><------>}
<------><------>best_pg_shift = buf_attr->page_shift;
<------><------>all_pg_count = mtr->kmem->npages;
<------>}
 
<------>/* must bigger than minimum hardware page shift */
<------>if (best_pg_shift < HNS_HW_PAGE_SHIFT || all_pg_count < 1) {
<------><------>ret = -EINVAL;
<------><------>ibdev_err(ibdev, "Failed to check mtr page shift %d count %d\n",
<------><------><------>  best_pg_shift, all_pg_count);
<------><------>goto err_alloc_mem;
<------>}
 
<------>mtr->hem_cfg.buf_pg_shift = best_pg_shift;
<------>mtr->hem_cfg.buf_pg_count = all_pg_count;
 
<------>return 0;
err_alloc_mem:
<------>mtr_free_bufs(hr_dev, mtr);
<------>return ret;
}
 
static int mtr_get_pages(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------><------> dma_addr_t *pages, int count, unsigned int page_shift)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>int npage;
<------>int err;
 
<------>if (mtr->umem)
<------><------>npage = hns_roce_get_umem_bufs(hr_dev, pages, count, 0,
<------><------><------><------><------>       mtr->umem, page_shift);
<------>else
<------><------>npage = hns_roce_get_kmem_bufs(hr_dev, pages, count, 0,
<------><------><------><------><------>       mtr->kmem);
 
<------>if (mtr->hem_cfg.is_direct && npage > 1) {
<------><------>err = mtr_check_direct_pages(pages, npage, page_shift);
<------><------>if (err) {
<------><------><------>ibdev_err(ibdev, "Failed to check %s direct page-%d\n",
<------><------><------><------>  mtr->umem ? "user" : "kernel", err);
<------><------><------>npage = err;
<------><------>}
<------>}
 
<------>return npage;
}
 
int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------>     dma_addr_t *pages, int page_cnt)
{
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>struct hns_roce_buf_region *r;
<------>int err;
<------>int i;
 
<------>/*
<------> * Only use the first page address as root ba when hopnum is 0, this
<------> * is because the addresses of all pages are consecutive in this case.
<------> */
<------>if (mtr->hem_cfg.is_direct) {
<------><------>mtr->hem_cfg.root_ba = pages[0];
<------><------>return 0;
<------>}
 
<------>for (i = 0; i < mtr->hem_cfg.region_count; i++) {
<------><------>r = &mtr->hem_cfg.region[i];
<------><------>if (r->offset + r->count > page_cnt) {
<------><------><------>err = -EINVAL;
<------><------><------>ibdev_err(ibdev,
<------><------><------><------>  "failed to check mtr%u end %u + %u, max %u.\n",
<------><------><------><------>  i, r->offset, r->count, page_cnt);
<------><------><------>return err;
<------><------>}
 
<------><------>err = mtr_map_region(hr_dev, mtr, &pages[r->offset], r);
<------><------>if (err) {
<------><------><------>ibdev_err(ibdev,
<------><------><------><------>  "failed to map mtr%u offset %u, ret = %d.\n",
<------><------><------><------>  i, r->offset, err);
<------><------><------>return err;
<------><------>}
<------>}
 
<------>return 0;
}
 
int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------>      int offset, u64 *mtt_buf, int mtt_max, u64 *base_addr)
{
<------>struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
<------>int start_index;
<------>int mtt_count;
<------>int total = 0;
<------>__le64 *mtts;
<------>int npage;
<------>u64 addr;
<------>int left;
 
<------>if (!mtt_buf || mtt_max < 1)
<------><------>goto done;
 
<------>/* no mtt memory in direct mode, so just return the buffer address */
<------>if (cfg->is_direct) {
<------><------>start_index = offset >> HNS_HW_PAGE_SHIFT;
<------><------>for (mtt_count = 0; mtt_count < cfg->region_count &&
<------><------>     total < mtt_max; mtt_count++) {
<------><------><------>npage = cfg->region[mtt_count].offset;
<------><------><------>if (npage < start_index)
<------><------><------><------>continue;
 
<------><------><------>addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT);
<------><------><------>if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
<------><------><------><------>mtt_buf[total] = to_hr_hw_page_addr(addr);
<------><------><------>else
<------><------><------><------>mtt_buf[total] = addr;
 
<------><------><------>total++;
<------><------>}
 
<------><------>goto done;
<------>}
 
<------>start_index = offset >> cfg->buf_pg_shift;
<------>left = mtt_max;
<------>while (left > 0) {
<------><------>mtt_count = 0;
<------><------>mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
<------><------><------><------><------><------>  start_index + total,
<------><------><------><------><------><------>  &mtt_count, NULL);
<------><------>if (!mtts || !mtt_count)
<------><------><------>goto done;
 
<------><------>npage = min(mtt_count, left);
<------><------>left -= npage;
<------><------>for (mtt_count = 0; mtt_count < npage; mtt_count++)
<------><------><------>mtt_buf[total++] = le64_to_cpu(mtts[mtt_count]);
<------>}
 
done:
<------>if (base_addr)
<------><------>*base_addr = cfg->root_ba;
 
<------>return total;
}
 
static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev,
<------><------><------>    struct hns_roce_buf_attr *attr,
<------><------><------>    struct hns_roce_hem_cfg *cfg,
<------><------><------>    unsigned int *buf_page_shift)
{
<------>struct hns_roce_buf_region *r;
<------>unsigned int page_shift;
<------>int page_cnt = 0;
<------>size_t buf_size;
<------>int region_cnt;
 
<------>if (cfg->is_direct) {
<------><------>buf_size = cfg->buf_pg_count << cfg->buf_pg_shift;
<------><------>page_cnt = DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE);
<------><------>/*
<------><------> * When HEM buffer use level-0 addressing, the page size equals
<------><------> * the buffer size, and the the page size = 4K * 2^N.
<------><------> */
<------><------>cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT + order_base_2(page_cnt);
<------><------>if (attr->region_count > 1) {
<------><------><------>cfg->buf_pg_count = page_cnt;
<------><------><------>page_shift = HNS_HW_PAGE_SHIFT;
<------><------>} else {
<------><------><------>cfg->buf_pg_count = 1;
<------><------><------>page_shift = cfg->buf_pg_shift;
<------><------><------>if (buf_size != 1 << page_shift) {
<------><------><------><------>ibdev_err(&hr_dev->ib_dev,
<------><------><------><------><------>  "failed to check direct size %zu shift %d.\n",
<------><------><------><------><------>  buf_size, page_shift);
<------><------><------><------>return -EINVAL;
<------><------><------>}
<------><------>}
<------>} else {
<------><------>page_shift = cfg->buf_pg_shift;
<------>}
 
<------>/* convert buffer size to page index and page count */
<------>for (page_cnt = 0, region_cnt = 0; page_cnt < cfg->buf_pg_count &&
<------>     region_cnt < attr->region_count &&
<------>     region_cnt < ARRAY_SIZE(cfg->region); region_cnt++) {
<------><------>r = &cfg->region[region_cnt];
<------><------>r->offset = page_cnt;
<------><------>buf_size = hr_hw_page_align(attr->region[region_cnt].size);
<------><------>r->count = DIV_ROUND_UP(buf_size, 1 << page_shift);
<------><------>page_cnt += r->count;
<------><------>r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum,
<------><------><------><------><------>     r->count);
<------>}
 
<------>if (region_cnt < 1) {
<------><------>ibdev_err(&hr_dev->ib_dev,
<------><------><------>  "failed to check mtr region count, pages = %d.\n",
<------><------><------>  cfg->buf_pg_count);
<------><------>return -ENOBUFS;
<------>}
 
<------>cfg->region_count = region_cnt;
<------>*buf_page_shift = page_shift;
 
<------>return page_cnt;
}
 
/**
 * hns_roce_mtr_create - Create hns memory translate region.
 *
 * @mtr: memory translate region
 * @buf_attr: buffer attribute for creating mtr
 * @ba_page_shift: page shift for multi-hop base address table
 * @udata: user space context, if it's NULL, means kernel space
 * @user_addr: userspace virtual address to start at
 */
int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
<------><------><------>struct hns_roce_buf_attr *buf_attr,
<------><------><------>unsigned int ba_page_shift, struct ib_udata *udata,
<------><------><------>unsigned long user_addr)
{
<------>struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
<------>struct ib_device *ibdev = &hr_dev->ib_dev;
<------>unsigned int buf_page_shift = 0;
<------>dma_addr_t *pages = NULL;
<------>int all_pg_cnt;
<------>int get_pg_cnt;
<------>int ret = 0;
 
<------>/* if disable mtt, all pages must in a continuous address range */
<------>cfg->is_direct = !mtr_has_mtt(buf_attr);
 
<------>/* if buffer only need mtt, just init the hem cfg */
<------>if (buf_attr->mtt_only) {
<------><------>cfg->buf_pg_shift = buf_attr->page_shift;
<------><------>cfg->buf_pg_count = mtr_bufs_size(buf_attr) >>
<------><------><------><------>    buf_attr->page_shift;
<------><------>mtr->umem = NULL;
<------><------>mtr->kmem = NULL;
<------>} else {
<------><------>ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, cfg->is_direct,
<------><------><------><------>     udata, user_addr);
<------><------>if (ret) {
<------><------><------>ibdev_err(ibdev,
<------><------><------><------>  "failed to alloc mtr bufs, ret = %d.\n", ret);
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>all_pg_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, cfg, &buf_page_shift);
<------>if (all_pg_cnt < 1) {
<------><------>ret = -ENOBUFS;
<------><------>ibdev_err(ibdev, "failed to init mtr buf cfg.\n");
<------><------>goto err_alloc_bufs;
<------>}
 
<------>hns_roce_hem_list_init(&mtr->hem_list);
<------>if (!cfg->is_direct) {
<------><------>ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list,
<------><------><------><------><------><------>cfg->region, cfg->region_count,
<------><------><------><------><------><------>ba_page_shift);
<------><------>if (ret) {
<------><------><------>ibdev_err(ibdev, "failed to request mtr hem, ret = %d.\n",
<------><------><------><------>  ret);
<------><------><------>goto err_alloc_bufs;
<------><------>}
<------><------>cfg->root_ba = mtr->hem_list.root_ba;
<------><------>cfg->ba_pg_shift = ba_page_shift;
<------>} else {
<------><------>cfg->ba_pg_shift = cfg->buf_pg_shift;
<------>}
 
<------>/* no buffer to map */
<------>if (buf_attr->mtt_only)
<------><------>return 0;
 
<------>/* alloc a tmp array to store buffer's dma address */
<------>pages = kvcalloc(all_pg_cnt, sizeof(dma_addr_t), GFP_KERNEL);
<------>if (!pages) {
<------><------>ret = -ENOMEM;
<------><------>ibdev_err(ibdev, "failed to alloc mtr page list %d.\n",
<------><------><------>  all_pg_cnt);
<------><------>goto err_alloc_hem_list;
<------>}
 
<------>get_pg_cnt = mtr_get_pages(hr_dev, mtr, pages, all_pg_cnt,
<------><------><------><------>   buf_page_shift);
<------>if (get_pg_cnt != all_pg_cnt) {
<------><------>ibdev_err(ibdev, "failed to get mtr page %d != %d.\n",
<------><------><------>  get_pg_cnt, all_pg_cnt);
<------><------>ret = -ENOBUFS;
<------><------>goto err_alloc_page_list;
<------>}
 
<------>/* write buffer's dma address to BA table */
<------>ret = hns_roce_mtr_map(hr_dev, mtr, pages, all_pg_cnt);
<------>if (ret) {
<------><------>ibdev_err(ibdev, "failed to map mtr pages, ret = %d.\n", ret);
<------><------>goto err_alloc_page_list;
<------>}
 
<------>/* drop tmp array */
<------>kvfree(pages);
<------>return 0;
err_alloc_page_list:
<------>kvfree(pages);
err_alloc_hem_list:
<------>hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
err_alloc_bufs:
<------>mtr_free_bufs(hr_dev, mtr);
<------>return ret;
}
 
void hns_roce_mtr_destroy(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
{
<------>/* release multi-hop addressing resource */
<------>hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
 
<------>/* free buffers */
<------>mtr_free_bufs(hr_dev, mtr);
}