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Name	Size	Permission
ib.h	2.09 KB	-rw-r--r--
ib_addr.h	7.66 KB	-rw-r--r--
ib_cache.h	4.23 KB	-rw-r--r--
ib_cm.h	16.92 KB	-rw-r--r--
ib_hdrs.h	6.79 KB	-rw-r--r--
ib_mad.h	24.48 KB	-rw-r--r--
ib_marshall.h	778 B	-rw-r--r--
ib_pack.h	7.71 KB	-rw-r--r--
ib_pma.h	4.17 KB	-rw-r--r--
ib_sa.h	19.5 KB	-rw-r--r--
ib_smi.h	4.21 KB	-rw-r--r--
ib_sysfs.h	1.23 KB	-rw-r--r--
ib_umem.h	6.64 KB	-rw-r--r--
ib_umem_odp.h	3.39 KB	-rw-r--r--
ib_verbs.h	138.24 KB	-rw-r--r--
iba.h	5.51 KB	-rw-r--r--
ibta_vol1_c12.h	12.94 KB	-rw-r--r--
iw_cm.h	7.12 KB	-rw-r--r--
iw_portmap.h	2.19 KB	-rw-r--r--
lag.h	530 B	-rw-r--r--
mr_pool.h	568 B	-rw-r--r--
opa_addr.h	2.39 KB	-rw-r--r--
opa_port_info.h	13.43 KB	-rw-r--r--
opa_smi.h	3 KB	-rw-r--r--
opa_vnic.h	2 KB	-rw-r--r--
peer_mem.h	6.19 KB	-rw-r--r--
rdma_cm.h	12.81 KB	-rw-r--r--
rdma_cm_ib.h	797 B	-rw-r--r--
rdma_counter.h	1.78 KB	-rw-r--r--
rdma_netlink.h	3.97 KB	-rw-r--r--
rdma_vt.h	14.22 KB	-rw-r--r--
rdmavt_cq.h	1.74 KB	-rw-r--r--
rdmavt_mr.h	3.94 KB	-rw-r--r--
rdmavt_qp.h	28.01 KB	-rw-r--r--
restrack.h	4.2 KB	-rw-r--r--
rw.h	2.22 KB	-rw-r--r--
signature.h	2.9 KB	-rw-r--r--
tid_rdma_defs.h	2.05 KB	-rw-r--r--
uverbs_ioctl.h	32.22 KB	-rw-r--r--
uverbs_named_ioctl.h	4.72 KB	-rw-r--r--
uverbs_std_types.h	5.23 KB	-rw-r--r--
uverbs_types.h	6.06 KB	-rw-r--r--

Code Editor : ib_umem_odp.h

/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
 * Copyright (c) 2014 Mellanox Technologies. All rights reserved.
 */

#ifndef IB_UMEM_ODP_H
#define IB_UMEM_ODP_H

#include <rdma/ib_umem.h>
#include <rdma/ib_verbs.h>

struct ib_umem_odp {
	struct ib_umem umem;
	struct mmu_interval_notifier notifier;
	struct pid *tgid;

/* An array of the pfns included in the on-demand paging umem. */
	unsigned long *pfn_list;

/*
	 * An array with DMA addresses mapped for pfns in pfn_list.
	 * The lower two bits designate access permissions.
	 * See ODP_READ_ALLOWED_BIT and ODP_WRITE_ALLOWED_BIT.
	 */
	dma_addr_t		*dma_list;
	/*
	 * The umem_mutex protects the page_list and dma_list fields of an ODP
	 * umem, allowing only a single thread to map/unmap pages. The mutex
	 * also protects access to the mmu notifier counters.
	 */
	struct mutex		umem_mutex;
	void			*private; /* for the HW driver to use. */

int npages;

/*
	 * An implicit odp umem cannot be DMA mapped, has 0 length, and serves
	 * only as an anchor for the driver to hold onto the per_mm. FIXME:
	 * This should be removed and drivers should work with the per_mm
	 * directly.
	 */
	bool is_implicit_odp;

unsigned int		page_shift;
};

static inline struct ib_umem_odp *to_ib_umem_odp(struct ib_umem *umem)
{
	return container_of(umem, struct ib_umem_odp, umem);
}

/* Returns the first page of an ODP umem. */
static inline unsigned long ib_umem_start(struct ib_umem_odp *umem_odp)
{
	return umem_odp->notifier.interval_tree.start;
}

/* Returns the address of the page after the last one of an ODP umem. */
static inline unsigned long ib_umem_end(struct ib_umem_odp *umem_odp)
{
	return umem_odp->notifier.interval_tree.last + 1;
}

static inline size_t ib_umem_odp_num_pages(struct ib_umem_odp *umem_odp)
{
	return (ib_umem_end(umem_odp) - ib_umem_start(umem_odp)) >>
	       umem_odp->page_shift;
}

/*
 * The lower 2 bits of the DMA address signal the R/W permissions for
 * the entry. To upgrade the permissions, provide the appropriate
 * bitmask to the map_dma_pages function.
 *
 * Be aware that upgrading a mapped address might result in change of
 * the DMA address for the page.
 */
#define ODP_READ_ALLOWED_BIT  (1<<0ULL)
#define ODP_WRITE_ALLOWED_BIT (1<<1ULL)

#define ODP_DMA_ADDR_MASK (~(ODP_READ_ALLOWED_BIT | ODP_WRITE_ALLOWED_BIT))

#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING

struct ib_umem_odp *
ib_umem_odp_get(struct ib_device *device, unsigned long addr, size_t size,
		int access, const struct mmu_interval_notifier_ops *ops);
struct ib_umem_odp *ib_umem_odp_alloc_implicit(struct ib_device *device,
					       int access);
struct ib_umem_odp *
ib_umem_odp_alloc_child(struct ib_umem_odp *root_umem, unsigned long addr,
			size_t size,
			const struct mmu_interval_notifier_ops *ops);
void ib_umem_odp_release(struct ib_umem_odp *umem_odp);

int ib_umem_odp_map_dma_and_lock(struct ib_umem_odp *umem_odp, u64 start_offset,
				 u64 bcnt, u64 access_mask, bool fault);

void ib_umem_odp_unmap_dma_pages(struct ib_umem_odp *umem_odp, u64 start_offset,
				 u64 bound);

#else /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */

static inline struct ib_umem_odp *
ib_umem_odp_get(struct ib_device *device, unsigned long addr, size_t size,
		int access, const struct mmu_interval_notifier_ops *ops)
{
	return ERR_PTR(-EINVAL);
}

static inline void ib_umem_odp_release(struct ib_umem_odp *umem_odp) {}

#endif /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */

#endif /* IB_UMEM_ODP_H */

${this.title}

Code Editor : ib_umem_odp.h