Received-SPF: pass (google.com: domain of linux-kernel+bounces-203106-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
From: Martin Oliveira <martin.oliveira@eideticom.com>
To: linux-rdma@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org,
	linux-mm@kvack.org
Cc: Jason Gunthorpe <jgg@ziepe.ca>,
	Leon Romanovsky <leon@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Logan Gunthorpe <logang@deltatee.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Tejun Heo <tj@kernel.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Marciniszyn <mike.marciniszyn@intel.com>,
	Michael Guralnik <michaelgur@nvidia.com>,
	Martin Oliveira <martin.oliveira@eideticom.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Ard Biesheuvel <ardb@kernel.org>,
	Valentine Sinitsyn <valesini@yandex-team.ru>,
	Lukas Wunner <lukas@wunner.de>
Subject: [PATCH 6/6] RDMA/umem: add support for P2P RDMA
Date: Wed,  5 Jun 2024 13:29:34 -0600
Message-Id: <20240605192934.742369-7-martin.oliveira@eideticom.com>
In-Reply-To: <20240605192934.742369-1-martin.oliveira@eideticom.com>
References: <20240605192934.742369-1-martin.oliveira@eideticom.com>
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Precedence: bulk
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0:
	=?us-ascii?Q?VwS2HTB3sluArf9tP/AMjIZe8Jxn2fndAsKHv7BqtII0aix5KJf3NgL/xP2v?=
 =?us-ascii?Q?A1sdQit89Ye4uDZvLWJyjZoT2QfmEaOfR8JzZlGebpJQBRIZSftYhVIIi3WT?=
 =?us-ascii?Q?aCi943r+SNxpYbtU/VO7YPotIjvbHRJH0s7DVuCm8WYTgyZ9ndXdM2GYBrfr?=
 =?us-ascii?Q?Ax0O1nOzYZGVJAhdpjNaifPV7Xw0IqopVxEkuUaiJRfP0xBcpJFF9o96NaZT?=
 =?us-ascii?Q?uPdR8t1+MJQVlSWdYgXBsBOqvnLSvoAw52vNAQRdbpApMWk8mLuX2wywCPjR?=
 =?us-ascii?Q?/5ufTKaN/VX3YycqXojbhTqsURnjUSn//tv6nLQDNYJCKEBhGFp9sSLt8OZM?=
 =?us-ascii?Q?KIyfeYZWkh6YbP0y0b2wU1NNlzNokfF/R92hS26Wa+xlcCQIx9Mhjl4OZQT/?=
 =?us-ascii?Q?9KMjx0trlXUUeCG5xtK5dYG+ExUThszBq1YjlExblOShkNCEhKFFPQXwPFJ1?=
 =?us-ascii?Q?z/rFzZUn29pNNrUhtBw11bwLNR1qVpNK3ZmKuZShXFDTq1sE08d1wduhgC/2?=
 =?us-ascii?Q?nQruvom9YQHA8eTeO3iifNjgSNBk0sFASNy5EJE+IaoJr+C5YCluWpkMUykO?=
 =?us-ascii?Q?XCXtYEctyRWK/AisG3sqZsV1YpRRTCNK7t1TsyuTIVXHvH7z2FRWMRYNalzu?=
 =?us-ascii?Q?CgFwxAWC2So+22EZUvilnMmUD9lSwOWbCdVZBpPgCNTwt568yhd0W0OFAyDd?=
 =?us-ascii?Q?v4souxmopQ/XT0LAQnt/VBjJrqMdwsrXLtlJ7o1jIwkqZE6KQiV/jsRzFvmF?=
 =?us-ascii?Q?xeOTjHf2YkKg5Pi+kGpP0rEN0rKHX7xISlaSm1zu8kIKCdcBKLKP5DHiS6vn?=
 =?us-ascii?Q?d1eeahteF+rAHukOAtrG9tv1htx73WL0h2Bt1SBwl3PC8PQtEecwFRisqL0r?=
 =?us-ascii?Q?5BzJtB3+KWr5ySQNzo8Y+N2jDo4rJr0GAz0qbB+63faZHd1+vuwdRKWG6XE8?=
 =?us-ascii?Q?jXobF12cgfBzHPCsyf8bAB+0L8jZyzX1uRwmtkR3l+vnSvPqpJDkdPC7IQml?=
 =?us-ascii?Q?Epm9V/JoIJD5cDokliDbM9n6E3ALgEZhne4026gcdoBGtlIN03Bef7qiAqGz?=
 =?us-ascii?Q?ShcrytVulkHxOVpNFTTS9MiWdrpjO6oazCkzWNZZqXWmufd2qV0zDeXhs/8z?=
 =?us-ascii?Q?gHvlRIeokMaPUtUIYhGY+/8CsY2p9sCc845hyob4ZeENo8PphiG+KxObq9v0?=
 =?us-ascii?Q?mRoTpV86QEWR+ZGtLwaDWNMjLkl74C2wTpXnnfV2qa3KyDC+BDvqXS/R3nHz?=
 =?us-ascii?Q?X/dosdyJwDcIkta/EjY+ZOy5ZyQlNQ7hm0M92eyt7KEQTV4ChNw/ywYJpG3I?=
 =?us-ascii?Q?A+kemtRnD9NkPFbqB1nmS2mWR+mzXWJ9GylmJYtC7D6yvUdxjbb5nGCQkdvN?=
 =?us-ascii?Q?FsYnj/Id3EPXveofN5QxVBFAqqnThdO/jUDFwPBwVPMa1rhCjO7mTT3enudT?=
 =?us-ascii?Q?nnLYqYWh+f1hTI77Kl+AzPLdxL8+2l/2MPdRqoNueQqr57WGtJha6BOPf/lT?=
 =?us-ascii?Q?+RY2K/HMZZ+0YYHwvi1a5JRShA0jenFOsuwwtDvSGIygwRBVYexdcfAgjXsw?=
 =?us-ascii?Q?zoz8yofD6Lj0FPrXa+Rg0DEM4g6/J1V5kHWWXgnaXVjtAaizXTXCFTpxlAIJ?=
 =?us-ascii?Q?+g=3D=3D?=
X-OriginatorOrg: eideticom.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 5b3302fa-a446-48fc-9457-08dc8595e9df
X-MS-Exchange-CrossTenant-AuthSource: MW3PR19MB4250.namprd19.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jun 2024 19:30:10.1101
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 3490cd4b-0360-4377-abb1-15f8c5af8fc2
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: pW4vfJjQZhLVzHXkMV3OJtREdxV0qWStmNY5Mhj3g+/P+PsH5Ok55ex2XALbpfaYTEzPgsqjRzbj003OD5RBNLbpgz9x5kbuzKMr1z6RIeE=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR19MB7093

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>
---
 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