[PATCH rdma-next 2/8] RDMA/mana_ib: Track PD per ucontext

[Long Li <longli@microsoft.com>]

Add per-ucontext list tracking for PD objects. Each PD is added to
the ucontext's pd_list on creation and removed on destruction. This
enables iterating over all PDs belonging to a ucontext, which will
be needed for service reset cleanup.

Signed-off-by: Long Li <longli@microsoft.com>
---
 drivers/infiniband/hw/mana/main.c    | 21 +++++++++++++++++++++
 drivers/infiniband/hw/mana/mana_ib.h |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index fc28bdafcfd6..62d89ca06ba1 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -72,6 +72,7 @@ int mana_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 	struct ib_device *ibdev = ibpd->device;
 	struct gdma_create_pd_resp resp = {};
 	struct gdma_create_pd_req req = {};
+	struct mana_ib_ucontext *mana_ucontext;
 	enum gdma_pd_flags flags = 0;
 	struct mana_ib_dev *dev;
 	struct gdma_context *gc;
@@ -107,6 +108,16 @@ int mana_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 
 	mutex_init(&pd->vport_mutex);
 	pd->vport_use_count = 0;
+
+	INIT_LIST_HEAD(&pd->ucontext_list);
+	if (udata) {
+		mana_ucontext = rdma_udata_to_drv_context(udata,
+					struct mana_ib_ucontext, ibucontext);
+		mutex_lock(&mana_ucontext->lock);
+		list_add_tail(&pd->ucontext_list, &mana_ucontext->pd_list);
+		mutex_unlock(&mana_ucontext->lock);
+	}
+
 	return 0;
 }
 
@@ -123,6 +134,15 @@ int mana_ib_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 	dev = container_of(ibdev, struct mana_ib_dev, ib_dev);
 	gc = mdev_to_gc(dev);
 
+	if (udata) {
+		struct mana_ib_ucontext *mana_ucontext =
+			rdma_udata_to_drv_context(udata,
+				struct mana_ib_ucontext, ibucontext);
+		mutex_lock(&mana_ucontext->lock);
+		list_del_init(&pd->ucontext_list);
+		mutex_unlock(&mana_ucontext->lock);
+	}
+
 	mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_PD, sizeof(req),
 			     sizeof(resp));
 
@@ -222,6 +242,7 @@ int mana_ib_alloc_ucontext(struct ib_ucontext *ibcontext,
 	ucontext->doorbell = doorbell_page;
 
 	mutex_init(&ucontext->lock);
+	INIT_LIST_HEAD(&ucontext->pd_list);
 
 	mutex_lock(&mdev->ucontext_lock);
 	list_add_tail(&ucontext->dev_list, &mdev->ucontext_list);
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index c7e333d3e9d8..6dba08bccc18 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -107,6 +107,7 @@ struct mana_ib_pd {
 
 	bool tx_shortform_allowed;
 	u32 tx_vp_offset;
+	struct list_head ucontext_list;
 };
 
 struct mana_ib_av {
@@ -203,6 +204,7 @@ struct mana_ib_ucontext {
 	struct list_head dev_list;
 	/* Protects resource lists below */
 	struct mutex lock;
+	struct list_head pd_list;
 };
 
 struct mana_ib_rwq_ind_table {
-- 
2.43.0