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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 <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);
}
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);
}
struct ib_pd *hns_roce_alloc_pd(struct ib_device *ib_dev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
struct device *dev = hr_dev->dev;
struct hns_roce_pd *pd;
int ret;
pd = kmalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return ERR_PTR(-ENOMEM);
ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
if (ret) {
kfree(pd);
dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
return ERR_PTR(ret);
}
if (context) {
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);
dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
kfree(pd);
return ERR_PTR(-EFAULT);
}
}
return &pd->ibpd;
}
EXPORT_SYMBOL_GPL(hns_roce_alloc_pd);
int hns_roce_dealloc_pd(struct ib_pd *pd)
{
hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
kfree(to_hr_pd(pd));
return 0;
}
EXPORT_SYMBOL_GPL(hns_roce_dealloc_pd);
int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
{
struct resource *res;
int ret = 0;
/* Using bitmap to manager UAR index */
ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->index);
if (ret == -1)
return -ENOMEM;
if (uar->index > 0)
uar->index = (uar->index - 1) %
(hr_dev->caps.phy_num_uars - 1) + 1;
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->index,
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);
}
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