netdev - [PATCH rdma-next 01/13] RDMA/mana_ib: Allow registration of DMA-mapped memory in PDs

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Message-Id: <1737394039-28772-2-git-send-email-kotaranov@linux.microsoft.com>
Date: Mon, 20 Jan 2025 09:27:07 -0800
From: Konstantin Taranov <kotaranov@...ux.microsoft.com>
To: kotaranov@...rosoft.com,
	shirazsaleem@...rosoft.com,
	pabeni@...hat.com,
	haiyangz@...rosoft.com,
	kys@...rosoft.com,
	edumazet@...gle.com,
	kuba@...nel.org,
	davem@...emloft.net,
	decui@...rosoft.com,
	wei.liu@...nel.org,
	sharmaajay@...rosoft.com,
	longli@...rosoft.com,
	jgg@...pe.ca,
	leon@...nel.org
Cc: linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-hyperv@...r.kernel.org
Subject: [PATCH rdma-next 01/13] RDMA/mana_ib: Allow registration of DMA-mapped memory in PDs

From: Konstantin Taranov <kotaranov@...rosoft.com>

Allow the HW to register DMA-mapped memory for kernel-level PDs.

Signed-off-by: Konstantin Taranov <kotaranov@...rosoft.com>
Reviewed-by: Shiraz Saleem <shirazsaleem@...rosoft.com>
---
 drivers/infiniband/hw/mana/main.c | 3 +++
 include/net/mana/gdma.h           | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 67c2d43..45b251b 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -82,6 +82,9 @@ int mana_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 	mana_gd_init_req_hdr(&req.hdr, GDMA_CREATE_PD, sizeof(req),
 			     sizeof(resp));
 
+	if (!udata)
+		flags |= GDMA_PD_FLAG_ALLOW_GPA_MR;
+
 	req.flags = flags;
 	err = mana_gd_send_request(gc, sizeof(req), &req,
 				   sizeof(resp), &resp);
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index 90f5665..03e1b25 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h
@@ -775,6 +775,7 @@ struct gdma_destroy_dma_region_req {
 
 enum gdma_pd_flags {
 	GDMA_PD_FLAG_INVALID = 0,
+	GDMA_PD_FLAG_ALLOW_GPA_MR = 1,
 };
 
 struct gdma_create_pd_req {
-- 
2.43.0