[PATCH rdma-next v4 1/4] RDMA/mana_ib: Introduce helpers to create and destroy mana queues

Konstantin Taranov
2024-04-08T09:14:21Z

Intoduce helpers to work with mana ib queues (struct mana_ib_queue).
A queue always consists of umem, gdma_region, and id.
A queue can become a WQ or a CQ.

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
---
drivers/infiniband/hw/mana/main.c | 39 ++++++++++++++++++++++++++++
drivers/infiniband/hw/mana/mana_ib.h | 10 +++++++
2 files changed, 49 insertions(+)

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 71e33feee..2d9d7a519 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -237,6 +237,45 @@ void mana_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
ibdev_dbg(ibdev, "Failed to destroy doorbell page %d\n", ret);
}

+int mana_ib_create_queue(struct mana_ib_dev *mdev, u64 addr, u32 size,
+ struct mana_ib_queue *queue)
+{
+ struct ib_umem *umem;
+ int err;
+
+ queue->umem = NULL;
+ queue->id = INVALID_QUEUE_ID;
+ queue->gdma_region = GDMA_INVALID_DMA_REGION;
+
+ umem = ib_umem_get(&mdev->ib_dev, addr, size, IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(umem)) {
+ err = PTR_ERR(umem);
+ ibdev_dbg(&mdev->ib_dev, "Failed to get umem, %d\n", err);
+ return err;
+ }
+
+ err = mana_ib_create_zero_offset_dma_region(mdev, umem, &queue->gdma_region);
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev, "Failed to create dma region, %d\n", err);
+ goto free_umem;
+ }
+ queue->umem = umem;
+
+ return 0;
+free_umem:
+ ib_umem_release(umem);
+ return err;
+}
+
+void mana_ib_destroy_queue(struct mana_ib_dev *mdev, struct mana_ib_queue *queue)
+{
+ /* Ignore return code as there is not much we can do about it.
+ * The error message is printed inside.
+ */
+ mana_ib_gd_destroy_dma_region(mdev, queue->gdma_region);
+ ib_umem_release(queue->umem);
+}
+
static int
mana_ib_gd_first_dma_region(struct mana_ib_dev *dev,
struct gdma_context *gc,
diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index f83390eeb..859fd3bfc 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -45,6 +45,12 @@ struct mana_ib_adapter_caps {
u32 max_inline_data_size;
};

+struct mana_ib_queue {
+ struct ib_umem *umem;
+ u64 gdma_region;
+ u64 id;
+};
+
struct mana_ib_dev {
struct ib_device ib_dev;
struct gdma_dev *gdma_dev;
@@ -169,6 +175,10 @@ int mana_ib_create_dma_region(struct mana_ib_dev *dev, struct ib_umem *umem,
int mana_ib_gd_destroy_dma_region(struct mana_ib_dev *dev,
mana_handle_t gdma_region);

+int mana_ib_create_queue(struct mana_ib_dev *mdev, u64 addr, u32 size,
+ struct mana_ib_queue *queue);
+void mana_ib_destroy_queue(struct mana_ib_dev *mdev, struct mana_ib_queue *queue);
+
struct ib_wq *mana_ib_create_wq(struct ib_pd *pd,
struct ib_wq_init_attr *init_attr,
struct ib_udata *udata);
--
2.43.0