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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 <linux/pci.h>
#include "hns_roce_device.h"
void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
ida_init(&pd_ida->ida);
pd_ida->max = hr_dev->caps.num_pds - 1;
pd_ida->min = hr_dev->caps.reserved_pds;
}
int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct ib_device *ib_dev = ibpd->device;
struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
struct hns_roce_pd *pd = to_hr_pd(ibpd);
int ret = 0;
int id;
id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
GFP_KERNEL);
if (id < 0) {
ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
return -ENOMEM;
}
pd->pdn = (unsigned long)id;
if (udata) {
struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
ret = ib_copy_to_udata(udata, &resp,
min(udata->outlen, sizeof(resp)));
if (ret) {
ida_free(&pd_ida->ida, id);
ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
}
}
return ret;
}
int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
return 0;
}
int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
{
struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
struct resource *res;
int id;
/* Using bitmap to manager UAR index */
id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
GFP_KERNEL);
if (id < 0) {
ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
return -ENOMEM;
}
uar->logic_idx = (unsigned long)id;
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) {
ida_free(&uar_ida->ida, id);
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_init_uar_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
ida_init(&uar_ida->ida);
uar_ida->max = hr_dev->caps.num_uars - 1;
uar_ida->min = hr_dev->caps.reserved_uars;
}
static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
{
struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
int id;
id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
GFP_KERNEL);
if (id < 0) {
ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
return -ENOMEM;
}
*xrcdn = (u32)id;
return 0;
}
void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
{
struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
ida_init(&xrcd_ida->ida);
xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
xrcd_ida->min = hr_dev->caps.reserved_xrcds;
}
int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
int ret;
if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC))
return -EINVAL;
ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
if (ret)
return ret;
return 0;
}
int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
return 0;
}
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