drivers/infiniband/hw/hns/hns_roce_pd.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/hns/hns_roce_pd.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/hns/hns_roce_pd.c
Extension
.c
Size
4825 bytes
Lines
172
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <rdma/uverbs_ioctl.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_respond_udata(udata, resp);
		if (ret)
			ida_free(&pd_ida->ida, id);
	}

	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;
	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;

	uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT);
	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE)
		hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4);

	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;

Annotation

Implementation Notes