public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: Leon Romanovsky <leon@kernel.org>
To: Binoy Jayan <binoy.jayan@linaro.org>
Cc: Doug Ledford <dledford@redhat.com>,
	Sean Hefty <sean.hefty@intel.com>,
	Hal Rosenstock <hal.rosenstock@gmail.com>,
	Arnd Bergmann <arnd@arndb.de>,
	linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 8/8] IB/mlx5: Add helper mlx5_ib_post_send_wait
Date: Tue, 25 Oct 2016 15:26:09 +0300	[thread overview]
Message-ID: <20161025122609.GQ25013@leon.nu> (raw)
In-Reply-To: <1477396919-27669-9-git-send-email-binoy.jayan@linaro.org>

[-- Attachment #1: Type: text/plain, Size: 7079 bytes --]

On Tue, Oct 25, 2016 at 05:31:59PM +0530, Binoy Jayan wrote:
> Clean up common code (to post a list of work requests to the send queue of
> the specified QP) at various places and add a helper function
> 'mlx5_ib_post_send_wait' to implement the same. The counting semaphore
> 'umr_common:sem' is also moved into the helper. This may later be modified
> to replace the semaphore with an alternative.
>
> Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
> ---
>  drivers/infiniband/hw/mlx5/mr.c | 96 +++++++++++++----------------------------
>  1 file changed, 29 insertions(+), 67 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
> index d4ad672..261984b 100644
> --- a/drivers/infiniband/hw/mlx5/mr.c
> +++ b/drivers/infiniband/hw/mlx5/mr.c
> @@ -856,16 +856,38 @@ static inline void mlx5_ib_init_umr_context(struct mlx5_ib_umr_context *context)
>  	init_completion(&context->done);
>  }
>
> +static inline int mlx5_ib_post_send_wait(struct mlx5_ib_dev *dev,
> +					 struct mlx5_ib_umr_context *umr_context,
> +					 struct mlx5_umr_wr *umrwr)
> +{
> +	struct umr_common *umrc = &dev->umrc;
> +	struct ib_send_wr __maybe_unused *bad;
> +	int err;
> +
> +	down(&umrc->sem);
> +	err = ib_post_send(umrc->qp, &umrwr->wr, &bad);
> +	if (err) {
> +		mlx5_ib_warn(dev, "UMR post send failed, err %d\n", err);
> +	} else {
> +		wait_for_completion(&umr_context->done);
> +		if (umr_context->status != IB_WC_SUCCESS) {
> +			mlx5_ib_warn(dev, "reg umr failed (%u)\n",
> +				     umr_context->status);
> +			err = -EFAULT;
> +		}
> +	}
> +	up(&umrc->sem);
> +	return err;
> +}
> +
>  static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
>  				  u64 virt_addr, u64 len, int npages,
>  				  int page_shift, int order, int access_flags)
>  {
>  	struct mlx5_ib_dev *dev = to_mdev(pd->device);
>  	struct device *ddev = dev->ib_dev.dma_device;
> -	struct umr_common *umrc = &dev->umrc;
>  	struct mlx5_ib_umr_context umr_context;
>  	struct mlx5_umr_wr umrwr = {};
> -	struct ib_send_wr *bad;
>  	struct mlx5_ib_mr *mr;
>  	struct ib_sge sg;
>  	int size;
> @@ -900,18 +922,9 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
>  	prep_umr_reg_wqe(pd, &umrwr.wr, &sg, dma, npages, mr->mmkey.key,
>  			 page_shift, virt_addr, len, access_flags);
>
> -	down(&umrc->sem);
> -	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);
> -	if (err) {
> -		mlx5_ib_warn(dev, "post send failed, err %d\n", err);
> +	err = mlx5_ib_post_send_wait(dev, &umr_context, &umrwr);
> +	if (err != -EFAULT)
>  		goto unmap_dma;

In case of success (err == 0), you will call to unmap_dma instead of
normal flow.

NAK,
Leon Romanovsky <leonro@mellanox.com>



> -	} else {
> -		wait_for_completion(&umr_context.done);
> -		if (umr_context.status != IB_WC_SUCCESS) {
> -			mlx5_ib_warn(dev, "reg umr failed\n");
> -			err = -EFAULT;
> -		}
> -	}
>
>  	mr->mmkey.iova = virt_addr;
>  	mr->mmkey.size = len;
> @@ -920,7 +933,6 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
>  	mr->live = 1;
>
>  unmap_dma:
> -	up(&umrc->sem);
>  	dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
>
>  	kfree(mr_pas);
> @@ -940,13 +952,11 @@ int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index, int npages,
>  {
>  	struct mlx5_ib_dev *dev = mr->dev;
>  	struct device *ddev = dev->ib_dev.dma_device;
> -	struct umr_common *umrc = &dev->umrc;
>  	struct mlx5_ib_umr_context umr_context;
>  	struct ib_umem *umem = mr->umem;
>  	int size;
>  	__be64 *pas;
>  	dma_addr_t dma;
> -	struct ib_send_wr *bad;
>  	struct mlx5_umr_wr wr;
>  	struct ib_sge sg;
>  	int err = 0;
> @@ -1031,19 +1041,7 @@ int mlx5_ib_update_mtt(struct mlx5_ib_mr *mr, u64 start_page_index, int npages,
>  		wr.mkey = mr->mmkey.key;
>  		wr.target.offset = start_page_index;
>
> -		down(&umrc->sem);
> -		err = ib_post_send(umrc->qp, &wr.wr, &bad);
> -		if (err) {
> -			mlx5_ib_err(dev, "UMR post send failed, err %d\n", err);
> -		} else {
> -			wait_for_completion(&umr_context.done);
> -			if (umr_context.status != IB_WC_SUCCESS) {
> -				mlx5_ib_err(dev, "UMR completion failed, code %d\n",
> -					    umr_context.status);
> -				err = -EFAULT;
> -			}
> -		}
> -		up(&umrc->sem);
> +		err = mlx5_ib_post_send_wait(dev, &umr_context, &wr);
>  	}
>  	dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
>
> @@ -1210,11 +1208,8 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
>  static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
>  {
>  	struct mlx5_core_dev *mdev = dev->mdev;
> -	struct umr_common *umrc = &dev->umrc;
>  	struct mlx5_ib_umr_context umr_context;
>  	struct mlx5_umr_wr umrwr = {};
> -	struct ib_send_wr *bad;
> -	int err;
>
>  	if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
>  		return 0;
> @@ -1224,25 +1219,7 @@ static int unreg_umr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
>  	umrwr.wr.wr_cqe = &umr_context.cqe;
>  	prep_umr_unreg_wqe(dev, &umrwr.wr, mr->mmkey.key);
>
> -	down(&umrc->sem);
> -	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);
> -	if (err) {
> -		up(&umrc->sem);
> -		mlx5_ib_dbg(dev, "err %d\n", err);
> -		goto error;
> -	} else {
> -		wait_for_completion(&umr_context.done);
> -		up(&umrc->sem);
> -	}
> -	if (umr_context.status != IB_WC_SUCCESS) {
> -		mlx5_ib_warn(dev, "unreg umr failed\n");
> -		err = -EFAULT;
> -		goto error;
> -	}
> -	return 0;
> -
> -error:
> -	return err;
> +	return mlx5_ib_post_send_wait(dev, &umr_context, &umrwr);
>  }
>
>  static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr,
> @@ -1252,10 +1229,8 @@ static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr,
>  	struct mlx5_ib_dev *dev = to_mdev(pd->device);
>  	struct device *ddev = dev->ib_dev.dma_device;
>  	struct mlx5_ib_umr_context umr_context;
> -	struct ib_send_wr *bad;
>  	struct mlx5_umr_wr umrwr = {};
>  	struct ib_sge sg;
> -	struct umr_common *umrc = &dev->umrc;
>  	dma_addr_t dma = 0;
>  	__be64 *mr_pas = NULL;
>  	int size;
> @@ -1291,21 +1266,8 @@ static int rereg_umr(struct ib_pd *pd, struct mlx5_ib_mr *mr, u64 virt_addr,
>  	}
>
>  	/* post send request to UMR QP */
> -	down(&umrc->sem);
> -	err = ib_post_send(umrc->qp, &umrwr.wr, &bad);
> -
> -	if (err) {
> -		mlx5_ib_warn(dev, "post send failed, err %d\n", err);
> -	} else {
> -		wait_for_completion(&umr_context.done);
> -		if (umr_context.status != IB_WC_SUCCESS) {
> -			mlx5_ib_warn(dev, "reg umr failed (%u)\n",
> -				     umr_context.status);
> -			err = -EFAULT;
> -		}
> -	}
> +	err = mlx5_ib_post_send_wait(dev, &umr_context, &umrwr);
>
> -	up(&umrc->sem);
>  	if (flags & IB_MR_REREG_TRANS) {
>  		dma_unmap_single(ddev, dma, size, DMA_TO_DEVICE);
>  		kfree(mr_pas);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

  parent reply	other threads:[~2016-10-25 12:26 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-25 12:01 [PATCH v2 0/8] infiniband: Remove semaphores Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 1/8] IB/core: iwpm_nlmsg_request: Replace semaphore with completion Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 2/8] IB/core: Replace semaphore sm_sem " Binoy Jayan
2016-10-25 12:43   ` Jack Wang
2016-10-25 15:08     ` Binoy Jayan
2016-10-25 15:48       ` Jack Wang
2016-10-25 15:48       ` Jason Gunthorpe
2016-10-25 20:15         ` Arnd Bergmann
2016-10-25 12:01 ` [PATCH v2 3/8] IB/hns: Replace semaphore poll_sem with mutex Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 4/8] IB/mthca: " Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 5/8] IB/isert: Replace semaphore sem with completion Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 6/8] IB/hns: Replace counting semaphore event_sem with wait_event Binoy Jayan
2016-10-25 12:28   ` Arnd Bergmann
2016-10-25 12:59     ` Binoy Jayan
2016-10-25 13:21       ` Arnd Bergmann
2016-10-25 13:35         ` Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 7/8] IB/mthca: " Binoy Jayan
2016-10-25 12:01 ` [PATCH v2 8/8] IB/mlx5: Add helper mlx5_ib_post_send_wait Binoy Jayan
2016-10-25 12:23   ` Arnd Bergmann
2016-10-25 12:46     ` Binoy Jayan
2016-10-25 12:26   ` Leon Romanovsky [this message]
2016-10-25 13:16     ` Binoy Jayan
2016-10-27  6:05       ` Leon Romanovsky
2016-10-27  6:23         ` Binoy Jayan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20161025122609.GQ25013@leon.nu \
    --to=leon@kernel.org \
    --cc=arnd@arndb.de \
    --cc=binoy.jayan@linaro.org \
    --cc=dledford@redhat.com \
    --cc=hal.rosenstock@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=sean.hefty@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox