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SubjectRe: [PATCH rdma-next 1/4] RDMA/mana_ib: Introduce helpers to create and destroy mana queues
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在 2024/3/13 14:24, Konstantin Taranov 写道:
> From: Konstantin Taranov <kotaranov@microsoft.com>
>
> 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 be used for a WQ or a CQ.
>
> Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
> ---
> drivers/infiniband/hw/mana/main.c | 40 ++++++++++++++++++++++++++++
> drivers/infiniband/hw/mana/mana_ib.h | 10 +++++++
> 2 files changed, 50 insertions(+)
>
> diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
> index 71e33feee..0ec940b97 100644
> --- a/drivers/infiniband/hw/mana/main.c
> +++ b/drivers/infiniband/hw/mana/main.c
> @@ -237,6 +237,46 @@ 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)
> +{
> + mana_ib_gd_destroy_dma_region(mdev, queue->gdma_region);

The function mana_ib_gd_destroy_dma_region will call
mana_gd_destroy_dma_region. In the function mana_gd_destroy_dma_region,
the function mana_gd_send_request will return the error -EPROTO.
The procedure is as below. So the function mana_ib_destroy_queue should
also handle this error?

mana_ib_gd_destroy_dma_region --- > mana_gd_destroy_dma_region

693 int mana_gd_destroy_dma_region(struct gdma_context *gc, u64
dma_region_handle)
694 {

..

706 err = mana_gd_send_request(gc, sizeof(req), &req,
sizeof(resp), &resp);
707 if (err || resp.hdr.status) {
708 dev_err(gc->dev, "Failed to destroy DMA region:
%d, 0x%x\n",
709 err, resp.hdr.status);
710 return -EPROTO;
711 }

..

714 }

Zhu Yanjun

> + 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);


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