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Date: Mon, 31 May 2021 10:07:21 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Guanhua Gao <guanhua.gao@....com>
Cc: Yi Zhao <yi.zhao@....com>, dmaengine@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] dmaengine: fsl-dpaa2-qdma: Remove the macro of
DPDMAI_MAX_QUEUE_NUM
On 22-04-21, 16:44, Guanhua Gao wrote:
> The max number of queue supported by DPAA2 qdma is determined
> by the number of CPUs. Due to the number of CPUs are different
> in different LS2 platforms, we remove the macro of
> DPDMAI_MAX_QUEUE_NUM which is defined 8.
>
> Signed-off-by: Guanhua Gao <guanhua.gao@....com>
> ---
> Change in v2:
> - Add new patch.
>
> drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c | 43 +++++++++++++++++++++----
> drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h | 4 +--
> drivers/dma/fsl-dpaa2-qdma/dpdmai.h | 5 ---
> 3 files changed, 39 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
> index 86c7ec5dc74e..3875fbb9fac3 100644
> --- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
> +++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c
> @@ -314,6 +314,8 @@ static int __cold dpaa2_qdma_setup(struct fsl_mc_device *ls_dev)
> struct dpaa2_qdma_priv_per_prio *ppriv;
> struct device *dev = &ls_dev->dev;
> struct dpaa2_qdma_priv *priv;
> + struct dpdmai_rx_queue_attr *rx_queue_attr;
> + struct dpdmai_tx_queue_attr *tx_queue_attr;
> int err = -EINVAL;
> int i;
>
> @@ -335,33 +337,51 @@ static int __cold dpaa2_qdma_setup(struct fsl_mc_device *ls_dev)
> &priv->dpdmai_attr);
> if (err) {
> dev_err(dev, "dpdmai_get_attributes() failed\n");
> - goto exit;
> + goto err_get_attr;
> }
>
> priv->num_pairs = priv->dpdmai_attr.num_of_queues;
> + rx_queue_attr = kcalloc(priv->num_pairs, sizeof(*rx_queue_attr),
> + GFP_KERNEL);
> + if (!rx_queue_attr) {
> + err = -ENOMEM;
> + goto err_get_attr;
> + }
> + priv->rx_queue_attr = rx_queue_attr;
> +
> + tx_queue_attr = kcalloc(priv->num_pairs, sizeof(*tx_queue_attr),
> + GFP_KERNEL);
> + if (!tx_queue_attr) {
> + err = -ENOMEM;
> + goto err_tx_queue;
> + }
> + priv->tx_queue_attr = tx_queue_attr;
Pointer is set here
> +
> ppriv = kcalloc(priv->num_pairs, sizeof(*ppriv), GFP_KERNEL);
> if (!ppriv) {
> err = -ENOMEM;
> - goto exit;
> + goto err_ppriv;
> }
> priv->ppriv = ppriv;
>
> for (i = 0; i < priv->num_pairs; i++) {
> err = dpdmai_get_rx_queue(priv->mc_io, 0, ls_dev->mc_handle,
> - i, 0, &priv->rx_queue_attr[i]);
> + i, 0, priv->rx_queue_attr + i);
> if (err) {
> dev_err(dev, "dpdmai_get_rx_queue() failed\n");
> goto exit;
> }
> - ppriv->rsp_fqid = priv->rx_queue_attr[i].fqid;
> + ppriv->rsp_fqid = ((struct dpdmai_rx_queue_attr *)
> + (priv->rx_queue_attr + i))->fqid;
>
> err = dpdmai_get_tx_queue(priv->mc_io, 0, ls_dev->mc_handle,
> - i, 0, &priv->tx_queue_attr[i]);
> + i, 0, priv->tx_queue_attr + i);
> if (err) {
> dev_err(dev, "dpdmai_get_tx_queue() failed\n");
> goto exit;
> }
> - ppriv->req_fqid = priv->tx_queue_attr[i].fqid;
> + ppriv->req_fqid = ((struct dpdmai_tx_queue_attr *)
> + (priv->tx_queue_attr + i))->fqid;
> ppriv->prio = DPAA2_QDMA_DEFAULT_PRIORITY;
> ppriv->priv = priv;
> ppriv->chan_id = i;
> @@ -370,6 +390,12 @@ static int __cold dpaa2_qdma_setup(struct fsl_mc_device *ls_dev)
>
> return 0;
> exit:
> + kfree(ppriv);
> +err_ppriv:
> + kfree(priv->tx_queue_attr);
> +err_tx_queue:
> + kfree(priv->rx_queue_attr);
Freed on error but you still have dangling reference held
> +err_get_attr:
> dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
> return err;
> }
> @@ -733,6 +759,8 @@ static int dpaa2_qdma_probe(struct fsl_mc_device *dpdmai_dev)
> dpaa2_dpmai_store_free(priv);
> dpaa2_dpdmai_dpio_free(priv);
> err_dpio_setup:
> + kfree(priv->rx_queue_attr);
> + kfree(priv->tx_queue_attr);
> kfree(priv->ppriv);
> dpdmai_close(priv->mc_io, 0, dpdmai_dev->mc_handle);
> err_dpdmai_setup:
> @@ -763,6 +791,9 @@ static int dpaa2_qdma_remove(struct fsl_mc_device *ls_dev)
> dpaa2_dpdmai_free_channels(dpaa2_qdma);
>
> dma_async_device_unregister(&dpaa2_qdma->dma_dev);
> + kfree(priv->rx_queue_attr);
> + kfree(priv->tx_queue_attr);
> + kfree(priv->ppriv);
> kfree(priv);
> kfree(dpaa2_qdma);
>
> diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h
> index 0a405fb13452..38aed372214e 100644
> --- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h
> +++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h
> @@ -123,8 +123,8 @@ struct dpaa2_qdma_priv {
> struct dpaa2_qdma_engine *dpaa2_qdma;
> struct dpaa2_qdma_priv_per_prio *ppriv;
>
> - struct dpdmai_rx_queue_attr rx_queue_attr[DPDMAI_MAX_QUEUE_NUM];
> - struct dpdmai_tx_queue_attr tx_queue_attr[DPDMAI_MAX_QUEUE_NUM];
> + struct dpdmai_rx_queue_attr *rx_queue_attr;
> + struct dpdmai_tx_queue_attr *tx_queue_attr;
> };
>
> struct dpaa2_qdma_priv_per_prio {
> diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
> index 0a87d37f7a92..f3a3eac97400 100644
> --- a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
> +++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
> @@ -51,11 +51,6 @@
> * Contains initialization APIs and runtime control APIs for DPDMAI
> */
>
> -/*
> - * Maximum number of Tx/Rx queues per DPDMAI object
> - */
> -#define DPDMAI_MAX_QUEUE_NUM 8
> -
> /**
> * Maximum number of Tx/Rx priorities per DPDMAI object
> */
> --
> 2.25.1
--
~Vinod
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