mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-15 16:16:37 +07:00
91a7c58fce
The IB verbs objects are counted by the kernel and ib_core ensures that
deallocate PD will success so it will be called once all other objects
that depends on PD will be released. This is achieved by managing various
reference counters on such objects.
The mlx5 driver didn't follow this standard flow when allowed DEVX objects
that are not managed by ib_core to be interleaved with the ones under
ib_core responsibility.
In such interleaved scenarios deallocate command can fail and ib_core will
leave uobject in internal DB and attempt to clean it later to free
resources anyway.
This change partially restores returned value from dealloc_pd() for all
drivers, but keeping in mind that non-DEVX devices and kernel verbs paths
shouldn't fail.
Fixes: 21a428a019 ("RDMA: Handle PD allocations by IB/core")
Link: https://lore.kernel.org/r/20200907120921.476363-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
140 lines
4.1 KiB
C
140 lines
4.1 KiB
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 <linux/pci.h>
|
|
#include <uapi/rdma/hns-abi.h>
|
|
#include "hns_roce_device.h"
|
|
|
|
static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
|
|
{
|
|
return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
|
|
}
|
|
|
|
static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
|
|
{
|
|
hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
|
|
}
|
|
|
|
int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
|
|
{
|
|
return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
|
|
hr_dev->caps.num_pds - 1,
|
|
hr_dev->caps.reserved_pds, 0);
|
|
}
|
|
|
|
void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
|
|
{
|
|
hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
|
|
}
|
|
|
|
int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
|
|
{
|
|
struct ib_device *ib_dev = ibpd->device;
|
|
struct hns_roce_pd *pd = to_hr_pd(ibpd);
|
|
int ret;
|
|
|
|
ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
|
|
if (ret) {
|
|
ibdev_err(ib_dev, "failed to alloc pd, ret = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (udata) {
|
|
struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
|
|
|
|
if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
|
|
hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
|
|
ibdev_err(ib_dev, "failed to copy to udata\n");
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
|
|
{
|
|
hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
|
|
return 0;
|
|
}
|
|
|
|
int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
|
|
{
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
/* Using bitmap to manager UAR index */
|
|
ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
|
|
if (ret)
|
|
return -ENOMEM;
|
|
|
|
if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
|
|
uar->index = (uar->logic_idx - 1) %
|
|
(hr_dev->caps.phy_num_uars - 1) + 1;
|
|
else
|
|
uar->index = 0;
|
|
|
|
if (!dev_is_pci(hr_dev->dev)) {
|
|
res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
|
|
return -EINVAL;
|
|
}
|
|
uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
|
|
} else {
|
|
uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
|
|
>> PAGE_SHIFT);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
|
|
{
|
|
hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
|
|
BITMAP_NO_RR);
|
|
}
|
|
|
|
int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
|
|
{
|
|
return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
|
|
hr_dev->caps.num_uars,
|
|
hr_dev->caps.num_uars - 1,
|
|
hr_dev->caps.reserved_uars, 0);
|
|
}
|
|
|
|
void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
|
|
{
|
|
hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
|
|
}
|