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RDMA/umem: Add support for creating pinned DMABUF umem with a given dma device

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Add support for creating pinned DMABUF umem with a specified DMA device
instead of the DMA device of the given IB device.

This API will be utilized in the upcoming patches of the series when
multiple path DMAs are implemented.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://patch.msgid.link/038aad36a43797e5591b20ba81051fc5758124f9.1722512548.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Yishai Hadas 2024-08-01 15:05:13 +03:00 committed by Leon Romanovsky
parent 2e8e631d7a
commit 682358fd35
2 changed files with 49 additions and 11 deletions
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45
drivers/infiniband/core/umem_dmabuf.c
View File

@ -110,10 +110,12 @@ void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf)
}
EXPORT_SYMBOL(ib_umem_dmabuf_unmap_pages);
struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
unsigned long offset, size_t size,
int fd, int access,
const struct dma_buf_attach_ops *ops)
static struct ib_umem_dmabuf *
ib_umem_dmabuf_get_with_dma_device(struct ib_device *device,
struct device *dma_device,
unsigned long offset, size_t size,
int fd, int access,
const struct dma_buf_attach_ops *ops)
{
struct dma_buf *dmabuf;
struct ib_umem_dmabuf *umem_dmabuf;
@ -152,7 +154,7 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
umem_dmabuf->attach = dma_buf_dynamic_attach(
dmabuf,
device->dma_device,
dma_device,
ops,
umem_dmabuf);
if (IS_ERR(umem_dmabuf->attach)) {
@ -168,6 +170,15 @@ out_release_dmabuf:
dma_buf_put(dmabuf);
return ret;
}
struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
unsigned long offset, size_t size,
int fd, int access,
const struct dma_buf_attach_ops *ops)
{
return ib_umem_dmabuf_get_with_dma_device(device, device->dma_device,
offset, size, fd, access, ops);
}
EXPORT_SYMBOL(ib_umem_dmabuf_get);
static void
@ -184,16 +195,18 @@ static struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_ops = {
.move_notify = ib_umem_dmabuf_unsupported_move_notify,
};
struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device,
unsigned long offset,
size_t size, int fd,
int access)
struct ib_umem_dmabuf *
ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device,
struct device *dma_device,
unsigned long offset, size_t size,
int fd, int access)
{
struct ib_umem_dmabuf *umem_dmabuf;
int err;
umem_dmabuf = ib_umem_dmabuf_get(device, offset, size, fd, access,
&ib_umem_dmabuf_attach_pinned_ops);
umem_dmabuf = ib_umem_dmabuf_get_with_dma_device(device, dma_device, offset,
size, fd, access,
&ib_umem_dmabuf_attach_pinned_ops);
if (IS_ERR(umem_dmabuf))
return umem_dmabuf;
@ -217,6 +230,16 @@ err_release:
ib_umem_release(&umem_dmabuf->umem);
return ERR_PTR(err);
}
EXPORT_SYMBOL(ib_umem_dmabuf_get_pinned_with_dma_device);
struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device,
unsigned long offset,
size_t size, int fd,
int access)
{
return ib_umem_dmabuf_get_pinned_with_dma_device(device, device->dma_device,
offset, size, fd, access);
}
EXPORT_SYMBOL(ib_umem_dmabuf_get_pinned);
void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf)

15
include/rdma/ib_umem.h
View File

@ -150,6 +150,11 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device,
unsigned long offset,
size_t size, int fd,
int access);
struct ib_umem_dmabuf *
ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device,
struct device *dma_device,
unsigned long offset, size_t size,
int fd, int access);
int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf);
void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf);
void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf);
@ -196,6 +201,16 @@ ib_umem_dmabuf_get_pinned(struct ib_device *device, unsigned long offset,
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct ib_umem_dmabuf *
ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device,
struct device *dma_device,
unsigned long offset, size_t size,
int fd, int access)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
{
return -EOPNOTSUPP;