[PATCH rdma-next] RDMA/mana_ib: Enable RDMA devices on the CDX bus

[Konstantin Taranov <kotaranov@linux.microsoft.com>]

From: Zhiyue Qiu <zhiyueqiu@microsoft.com>

Enable MANA RDMA on CDX by depending on the shared GDMA core and matching
the CDX auxiliary devices.

Map non-PCI userspace doorbells with pgprot_device() to match the CDX
transport, and report the Microsoft vendor ID directly.

Signed-off-by: Zhiyue Qiu <zhiyueqiu@microsoft.com>
Co-developed-by: Konstantin Taranov <kotaranov@microsoft.com>
Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
---
 drivers/infiniband/hw/mana/Kconfig  | 10 +++++-----
 drivers/infiniband/hw/mana/device.c |  2 ++
 drivers/infiniband/hw/mana/main.c   |  8 +++++---
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/hw/mana/Kconfig b/drivers/infiniband/hw/mana/Kconfig
index 546640657..6eae7fa91 100644
--- a/drivers/infiniband/hw/mana/Kconfig
+++ b/drivers/infiniband/hw/mana/Kconfig
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config MANA_INFINIBAND
 	tristate "Microsoft Azure Network Adapter support"
-	depends on NETDEVICES && ETHERNET && PCI && MICROSOFT_MANA
+	depends on NETDEVICES && ETHERNET && MICROSOFT_GDMA_CORE
 	help
 	  This driver provides low-level RDMA support for Microsoft Azure
-	  Network Adapter (MANA). MANA supports RDMA features that can be used
-	  for workloads (e.g. DPDK, MPI etc) that uses RDMA verbs to directly
-	  access hardware from user-mode processes in Microsoft Azure cloud
-	  environment.
+	  Network Adapter (MANA) on the PCI or CDX bus. MANA supports RDMA
+	  features that workloads such as DPDK and MPI can use to directly
+	  access hardware from user-mode processes in the Microsoft Azure
+	  cloud environment.
diff --git a/drivers/infiniband/hw/mana/device.c b/drivers/infiniband/hw/mana/device.c
index 62c7803ca..33e474907 100644
--- a/drivers/infiniband/hw/mana/device.c
+++ b/drivers/infiniband/hw/mana/device.c
@@ -257,6 +257,8 @@ static void mana_ib_remove(struct auxiliary_device *adev)
 static const struct auxiliary_device_id mana_id_table[] = {
 	{ .name = "mana.rdma", },
 	{ .name = "mana.eth", },
+	{ .name = "mana_cdx.rdma", },
+	{ .name = "mana_cdx.eth", },
 	{},
 };
 
diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 858bbc325..c63ac20e7 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -572,7 +572,10 @@ int mana_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
 	pfn = (gc->phys_db_page_base +
 	       gc->db_page_size * mana_ucontext->doorbell) >>
 	      PAGE_SHIFT;
-	prot = pgprot_writecombine(vma->vm_page_prot);
+	if (dev_is_pci(gc->dev))
+		prot = pgprot_writecombine(vma->vm_page_prot);
+	else
+		prot = pgprot_device(vma->vm_page_prot);
 
 	ret = rdma_user_mmap_io(ibcontext, vma, pfn, PAGE_SIZE, prot,
 				NULL);
@@ -623,14 +626,13 @@ int mana_ib_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
 			 struct ib_udata *uhw)
 {
 	struct mana_ib_dev *dev = container_of(ibdev, struct mana_ib_dev, ib_dev);
-	struct pci_dev *pdev = to_pci_dev(mdev_to_gc(dev)->dev);
 	int err;
 
 	err = ib_no_udata_io(uhw);
 	if (err)
 		return err;
 
-	props->vendor_id = pdev->vendor;
+	props->vendor_id = PCI_VENDOR_ID_MICROSOFT;
 	props->vendor_part_id = dev->gdma_dev->dev_id.type;
 	props->max_mr_size = MANA_IB_MAX_MR_SIZE;
 	props->page_size_cap = dev->adapter_caps.page_size_cap;

base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.43.0