RDMA/mana_ib: Introduce helpers to create and destroy mana queues

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>
Link: https://lore.kernel.org/r/1711483688-24358-2-git-send-email-kotaranov@linux.microsoft.com
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index 71e33feee61bb124ccabf510dda65eb0fb39fda9..4524c6b8074878cdffbf94d90d262d062ccbf7ad 100644 (file)
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c
@@ -237,6 +237,49 @@ 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;
+
+       ibdev_dbg(&mdev->ib_dev,
+                 "create_dma_region ret %d gdma_region 0x%llx\n",
+                 err, queue->gdma_region);
+
+       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 f83390eebb7d751d731c48f232dc03bfc6847baa..859fd3bfc764f24b920134a842e1eeea2531076f 100644 (file)
--- 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);