diff mbox series

[v1,2/6] dmaengine: dw-edma: Introduce helpers for getting the eDMA/HDMA max channel count

Message ID 1705669223-5655-3-git-send-email-quic_msarkar@quicinc.com (mailing list archive)
State Changes Requested
Headers show
Series Add Change to integrate HDMA with dwc ep driver | expand

Commit Message

Mrinmay Sarkar Jan. 19, 2024, 1 p.m. UTC 
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Add common helpers for getting the eDMA/HDMA max channel count.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
---
 drivers/dma/dw-edma/dw-edma-core.c           | 18 ++++++++++++++++++
 drivers/pci/controller/dwc/pcie-designware.c |  6 +++---
 include/linux/dma/edma.h                     | 14 ++++++++++++++
 3 files changed, 35 insertions(+), 3 deletions(-)

Comments

Dmitry Baryshkov Jan. 19, 2024, 1:26 p.m. UTC | #1 
On Fri, 19 Jan 2024 at 15:00, Mrinmay Sarkar <quic_msarkar@quicinc.com> wrote:
>
> From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
>
> Add common helpers for getting the eDMA/HDMA max channel count.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
> ---
>  drivers/dma/dw-edma/dw-edma-core.c           | 18 ++++++++++++++++++
>  drivers/pci/controller/dwc/pcie-designware.c |  6 +++---
>  include/linux/dma/edma.h                     | 14 ++++++++++++++
>  3 files changed, 35 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
> index 7fe1c19..2bd6e43 100644
> --- a/drivers/dma/dw-edma/dw-edma-core.c
> +++ b/drivers/dma/dw-edma/dw-edma-core.c
> @@ -902,6 +902,24 @@ static int dw_edma_irq_request(struct dw_edma *dw,
>         return err;
>  }
>
> +static u32 dw_edma_get_max_ch(enum dw_edma_map_format mf, enum dw_edma_dir dir)
> +{
> +       if (mf == EDMA_MF_HDMA_NATIVE)
> +               return HDMA_MAX_NR_CH;

This will break unless patch 5 is applied. Please move the
corresponding definition to this path.

> +
> +       return dir == EDMA_DIR_WRITE ? EDMA_MAX_WR_CH : EDMA_MAX_RD_CH;
> +}
> +
> +u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf)
> +{
> +       return dw_edma_get_max_ch(mf, EDMA_DIR_READ);
> +}
> +
> +u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf)
> +{
> +       return dw_edma_get_max_ch(mf, EDMA_DIR_WRITE);
> +}
> +
>  int dw_edma_probe(struct dw_edma_chip *chip)
>  {
>         struct device *dev;
Manivannan Sadhasivam Jan. 30, 2024, 8:48 a.m. UTC | #2 
On Fri, Jan 19, 2024 at 03:26:56PM +0200, Dmitry Baryshkov wrote:
> On Fri, 19 Jan 2024 at 15:00, Mrinmay Sarkar <quic_msarkar@quicinc.com> wrote:
> >
> > From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> >
> > Add common helpers for getting the eDMA/HDMA max channel count.
> >
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
> > ---
> >  drivers/dma/dw-edma/dw-edma-core.c           | 18 ++++++++++++++++++
> >  drivers/pci/controller/dwc/pcie-designware.c |  6 +++---
> >  include/linux/dma/edma.h                     | 14 ++++++++++++++
> >  3 files changed, 35 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
> > index 7fe1c19..2bd6e43 100644
> > --- a/drivers/dma/dw-edma/dw-edma-core.c
> > +++ b/drivers/dma/dw-edma/dw-edma-core.c
> > @@ -902,6 +902,24 @@ static int dw_edma_irq_request(struct dw_edma *dw,
> >         return err;
> >  }
> >
> > +static u32 dw_edma_get_max_ch(enum dw_edma_map_format mf, enum dw_edma_dir dir)
> > +{
> > +       if (mf == EDMA_MF_HDMA_NATIVE)
> > +               return HDMA_MAX_NR_CH;
> 
> This will break unless patch 5 is applied.

I believe you are referring to patch 4.

> Please move the
> corresponding definition to this path.
>

Right. But it can be fixed by reordering the patches.

Mrinmay, please move patch 4/6 ahead of this one.

- Mani
Serge Semin Feb. 2, 2024, 10:51 a.m. UTC | #3 
On Fri, Jan 19, 2024 at 06:30:18PM +0530, Mrinmay Sarkar wrote:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> 
> Add common helpers for getting the eDMA/HDMA max channel count.

See my comment to the patch 4:
https://lore.kernel.org/linux-pci/qfdsnz7louqdrs6mhz72o6mzjo66kw63vtlhgpz6hgqfyyzyhq@tge3r7mvwtw3/

-Serge(y)

> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
> ---
>  drivers/dma/dw-edma/dw-edma-core.c           | 18 ++++++++++++++++++
>  drivers/pci/controller/dwc/pcie-designware.c |  6 +++---
>  include/linux/dma/edma.h                     | 14 ++++++++++++++
>  3 files changed, 35 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
> index 7fe1c19..2bd6e43 100644
> --- a/drivers/dma/dw-edma/dw-edma-core.c
> +++ b/drivers/dma/dw-edma/dw-edma-core.c
> @@ -902,6 +902,24 @@ static int dw_edma_irq_request(struct dw_edma *dw,
>  	return err;
>  }
>  
> +static u32 dw_edma_get_max_ch(enum dw_edma_map_format mf, enum dw_edma_dir dir)
> +{
> +	if (mf == EDMA_MF_HDMA_NATIVE)
> +		return HDMA_MAX_NR_CH;
> +
> +	return dir == EDMA_DIR_WRITE ? EDMA_MAX_WR_CH : EDMA_MAX_RD_CH;
> +}
> +
> +u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf)
> +{
> +	return dw_edma_get_max_ch(mf, EDMA_DIR_READ);
> +}
> +
> +u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf)
> +{
> +	return dw_edma_get_max_ch(mf, EDMA_DIR_WRITE);
> +}
> +
>  int dw_edma_probe(struct dw_edma_chip *chip)
>  {
>  	struct device *dev;
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index eca047a..96575b8 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -864,7 +864,7 @@ static int dw_pcie_edma_irq_vector(struct dw_edma_chip *edma, unsigned int nr)
>  	char name[6];
>  	int ret;
>  
> -	if (nr >= EDMA_MAX_WR_CH + EDMA_MAX_RD_CH)
> +	if (nr >= dw_edma_get_max_rd_ch(edma->mf) + dw_edma_get_max_wr_ch(edma->mf))
>  		return -EINVAL;
>  
>  	ret = platform_get_irq_byname_optional(pdev, "dma");
> @@ -923,8 +923,8 @@ static int dw_pcie_edma_find_chip(struct dw_pcie *pci)
>  	pci->edma.ll_rd_cnt = FIELD_GET(PCIE_DMA_NUM_RD_CHAN, val);
>  
>  	/* Sanity check the channels count if the mapping was incorrect */
> -	if (!pci->edma.ll_wr_cnt || pci->edma.ll_wr_cnt > EDMA_MAX_WR_CH ||
> -	    !pci->edma.ll_rd_cnt || pci->edma.ll_rd_cnt > EDMA_MAX_RD_CH)
> +	if (!pci->edma.ll_wr_cnt || pci->edma.ll_wr_cnt > dw_edma_get_max_wr_ch(pci->edma.mf) ||
> +	    !pci->edma.ll_rd_cnt || pci->edma.ll_rd_cnt > dw_edma_get_max_rd_ch(pci->edma.mf))
>  		return -EINVAL;
>  
>  	return 0;
> diff --git a/include/linux/dma/edma.h b/include/linux/dma/edma.h
> index 7197a58..550f6a4 100644
> --- a/include/linux/dma/edma.h
> +++ b/include/linux/dma/edma.h
> @@ -106,6 +106,9 @@ struct dw_edma_chip {
>  #if IS_REACHABLE(CONFIG_DW_EDMA)
>  int dw_edma_probe(struct dw_edma_chip *chip);
>  int dw_edma_remove(struct dw_edma_chip *chip);
> +
> +u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf);
> +u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf);
>  #else
>  static inline int dw_edma_probe(struct dw_edma_chip *chip)
>  {
> @@ -116,6 +119,17 @@ static inline int dw_edma_remove(struct dw_edma_chip *chip)
>  {
>  	return 0;
>  }
> +
> +static inline u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf)
> +{
> +	return 0;
> +}
> +
> +static inline u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf)
> +{
> +	return 0;
> +}
> +
>  #endif /* CONFIG_DW_EDMA */
>  
>  #endif /* _DW_EDMA_H */
> -- 
> 2.7.4
>
diff mbox series

Patch

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 7fe1c19..2bd6e43 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -902,6 +902,24 @@  static int dw_edma_irq_request(struct dw_edma *dw,
 	return err;
 }
 
+static u32 dw_edma_get_max_ch(enum dw_edma_map_format mf, enum dw_edma_dir dir)
+{
+	if (mf == EDMA_MF_HDMA_NATIVE)
+		return HDMA_MAX_NR_CH;
+
+	return dir == EDMA_DIR_WRITE ? EDMA_MAX_WR_CH : EDMA_MAX_RD_CH;
+}
+
+u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf)
+{
+	return dw_edma_get_max_ch(mf, EDMA_DIR_READ);
+}
+
+u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf)
+{
+	return dw_edma_get_max_ch(mf, EDMA_DIR_WRITE);
+}
+
 int dw_edma_probe(struct dw_edma_chip *chip)
 {
 	struct device *dev;
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index eca047a..96575b8 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -864,7 +864,7 @@  static int dw_pcie_edma_irq_vector(struct dw_edma_chip *edma, unsigned int nr)
 	char name[6];
 	int ret;
 
-	if (nr >= EDMA_MAX_WR_CH + EDMA_MAX_RD_CH)
+	if (nr >= dw_edma_get_max_rd_ch(edma->mf) + dw_edma_get_max_wr_ch(edma->mf))
 		return -EINVAL;
 
 	ret = platform_get_irq_byname_optional(pdev, "dma");
@@ -923,8 +923,8 @@  static int dw_pcie_edma_find_chip(struct dw_pcie *pci)
 	pci->edma.ll_rd_cnt = FIELD_GET(PCIE_DMA_NUM_RD_CHAN, val);
 
 	/* Sanity check the channels count if the mapping was incorrect */
-	if (!pci->edma.ll_wr_cnt || pci->edma.ll_wr_cnt > EDMA_MAX_WR_CH ||
-	    !pci->edma.ll_rd_cnt || pci->edma.ll_rd_cnt > EDMA_MAX_RD_CH)
+	if (!pci->edma.ll_wr_cnt || pci->edma.ll_wr_cnt > dw_edma_get_max_wr_ch(pci->edma.mf) ||
+	    !pci->edma.ll_rd_cnt || pci->edma.ll_rd_cnt > dw_edma_get_max_rd_ch(pci->edma.mf))
 		return -EINVAL;
 
 	return 0;
diff --git a/include/linux/dma/edma.h b/include/linux/dma/edma.h
index 7197a58..550f6a4 100644
--- a/include/linux/dma/edma.h
+++ b/include/linux/dma/edma.h
@@ -106,6 +106,9 @@  struct dw_edma_chip {
 #if IS_REACHABLE(CONFIG_DW_EDMA)
 int dw_edma_probe(struct dw_edma_chip *chip);
 int dw_edma_remove(struct dw_edma_chip *chip);
+
+u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf);
+u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf);
 #else
 static inline int dw_edma_probe(struct dw_edma_chip *chip)
 {
@@ -116,6 +119,17 @@  static inline int dw_edma_remove(struct dw_edma_chip *chip)
 {
 	return 0;
 }
+
+static inline u32 dw_edma_get_max_rd_ch(enum dw_edma_map_format mf)
+{
+	return 0;
+}
+
+static inline u32 dw_edma_get_max_wr_ch(enum dw_edma_map_format mf)
+{
+	return 0;
+}
+
 #endif /* CONFIG_DW_EDMA */
 
 #endif /* _DW_EDMA_H */