From: Martin Oliveira <martin.oliveira@eideticom.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-rdma@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
Artemy Kovalyov <artemyko@nvidia.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,
Logan Gunthorpe <logang@deltatee.com>,
Martin Oliveira <martin.oliveira@eideticom.com>,
Michael Guralnik <michaelgur@nvidia.com>,
Mike Marciniszyn <mike.marciniszyn@intel.com>,
Shiraz Saleem <shiraz.saleem@intel.com>,
Tejun Heo <tj@kernel.org>, John Hubbard <jhubbard@nvidia.com>,
Dan Williams <dan.j.williams@intel.com>,
David Sloan <david.sloan@eideticom.com>,
Jason Gunthorpe <jgg@nvidia.com>
Subject: [PATCH v4 3/3] RDMA/umem: add support for P2P RDMA
Date: Mon, 8 Jul 2024 10:57:14 -0600 [thread overview]
Message-ID: <20240708165714.3401377-4-martin.oliveira@eideticom.com> (raw)
In-Reply-To: <20240708165714.3401377-1-martin.oliveira@eideticom.com>
If the device supports P2PDMA, add the FOLL_PCI_P2PDMA flag
This allows ibv_reg_mr() and friends to use P2PDMA memory that has been
mmaped into userspace for MRs in IB and RDMA transactions.
Co-developed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Martin Oliveira <martin.oliveira@eideticom.com>
Acked-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/infiniband/core/umem.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 07c571c7b699..b59bb6e1475e 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -208,6 +208,9 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
if (umem->writable)
gup_flags |= FOLL_WRITE;
+ if (ib_dma_pci_p2p_dma_supported(device))
+ gup_flags |= FOLL_PCI_P2PDMA;
+
while (npages) {
cond_resched();
pinned = pin_user_pages_fast(cur_base,
--
2.34.1
prev parent reply other threads:[~2024-07-08 16:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-08 16:57 [PATCH v4 0/3] Enable P2PDMA in Userspace RDMA Martin Oliveira
2024-07-08 16:57 ` [PATCH v4 1/3] kernfs: remove page_mkwrite() from vm_operations_struct Martin Oliveira
2024-07-09 5:24 ` Greg Kroah-Hartman
2024-07-09 14:34 ` Matthew Wilcox
2024-07-08 16:57 ` [PATCH v4 2/3] mm/gup: allow FOLL_LONGTERM & FOLL_PCI_P2PDMA Martin Oliveira
2024-07-08 16:57 ` Martin Oliveira [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240708165714.3401377-4-martin.oliveira@eideticom.com \
--to=martin.oliveira@eideticom.com \
--cc=akpm@linux-foundation.org \
--cc=artemyko@nvidia.com \
--cc=dan.j.williams@intel.com \
--cc=david.sloan@eideticom.com \
--cc=gregkh@linuxfoundation.org \
--cc=jgg@nvidia.com \
--cc=jgg@ziepe.ca \
--cc=jhubbard@nvidia.com \
--cc=leon@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-rdma@vger.kernel.org \
--cc=logang@deltatee.com \
--cc=michaelgur@nvidia.com \
--cc=mike.marciniszyn@intel.com \
--cc=shiraz.saleem@intel.com \
--cc=tj@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox