diff mbox series

[v1,5/6] PCI: qcom-ep: Provide number of read/write channel for HDMA

Message ID 1705669223-5655-6-git-send-email-quic_msarkar@quicinc.com (mailing list archive)
State Superseded
Headers show
Series Add Change to integrate HDMA with dwc ep driver | expand

Commit Message

Mrinmay Sarkar Jan. 19, 2024, 1 p.m. UTC 
There is no standard way to auto detect the number of available
read/write channels in a platform. So adding this change to provide
read/write channels count and also provide "EDMA_MF_HDMA_NATIVE"
flag to support HDMA for 8775 platform.

8775 has IP version 1.34.0 so intruduce a new cfg(cfg_1_34_0) for
this platform. Add struct qcom_pcie_ep_cfg as match data. Assign
hdma_supported flag into struct qcom_pcie_ep_cfg and set it true
in cfg_1_34_0.

Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
---
 drivers/pci/controller/dwc/pcie-qcom-ep.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

Comments

Manivannan Sadhasivam Jan. 30, 2024, 8:53 a.m. UTC | #1 
On Fri, Jan 19, 2024 at 06:30:21PM +0530, Mrinmay Sarkar wrote:
> There is no standard way to auto detect the number of available
> read/write channels in a platform. So adding this change to provide
> read/write channels count and also provide "EDMA_MF_HDMA_NATIVE"
> flag to support HDMA for 8775 platform.
> 
> 8775 has IP version 1.34.0 so intruduce a new cfg(cfg_1_34_0) for
> this platform. Add struct qcom_pcie_ep_cfg as match data. Assign
> hdma_supported flag into struct qcom_pcie_ep_cfg and set it true
> in cfg_1_34_0.
> 
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
> ---
>  drivers/pci/controller/dwc/pcie-qcom-ep.c | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
> index 45008e0..8d56435 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
> @@ -149,6 +149,10 @@ enum qcom_pcie_ep_link_status {
>  	QCOM_PCIE_EP_LINK_DOWN,
>  };
>  

Add kdoc comment please as like the below struct.

> +struct qcom_pcie_ep_cfg {
> +	bool hdma_supported;
> +};
> +
>  /**
>   * struct qcom_pcie_ep - Qualcomm PCIe Endpoint Controller
>   * @pci: Designware PCIe controller struct
> @@ -167,6 +171,7 @@ enum qcom_pcie_ep_link_status {
>   * @num_clks: PCIe clocks count
>   * @perst_en: Flag for PERST enable
>   * @perst_sep_en: Flag for PERST separation enable
> + * @cfg: PCIe EP config struct
>   * @link_status: PCIe Link status
>   * @global_irq: Qualcomm PCIe specific Global IRQ
>   * @perst_irq: PERST# IRQ
> @@ -194,6 +199,7 @@ struct qcom_pcie_ep {
>  	u32 perst_en;
>  	u32 perst_sep_en;
>  
> +	const struct qcom_pcie_ep_cfg *cfg;
>  	enum qcom_pcie_ep_link_status link_status;
>  	int global_irq;
>  	int perst_irq;
> @@ -511,6 +517,10 @@ static void qcom_pcie_perst_assert(struct dw_pcie *pci)
>  	pcie_ep->link_status = QCOM_PCIE_EP_LINK_DISABLED;
>  }
>  
> +static const struct qcom_pcie_ep_cfg cfg_1_34_0 = {
> +	.hdma_supported = true,
> +};
> +
>  /* Common DWC controller ops */
>  static const struct dw_pcie_ops pci_ops = {
>  	.link_up = qcom_pcie_dw_link_up,
> @@ -816,6 +826,13 @@ static int qcom_pcie_ep_probe(struct platform_device *pdev)
>  	pcie_ep->pci.ops = &pci_ops;
>  	pcie_ep->pci.ep.ops = &pci_ep_ops;
>  	pcie_ep->pci.edma.nr_irqs = 1;
> +
> +	pcie_ep->cfg = of_device_get_match_data(dev);

Why do you want to cache "cfg" since it is only used in probe()?

> +	if (pcie_ep->cfg && pcie_ep->cfg->hdma_supported) {
> +		pcie_ep->pci.edma.ll_wr_cnt = 1;
> +		pcie_ep->pci.edma.ll_rd_cnt = 1;

Is the platform really has a single r/w channel?

- Mani
Mrinmay Sarkar Jan. 30, 2024, 1:18 p.m. UTC | #2 
On 1/30/2024 2:23 PM, Manivannan Sadhasivam wrote:
> On Fri, Jan 19, 2024 at 06:30:21PM +0530, Mrinmay Sarkar wrote:
>> There is no standard way to auto detect the number of available
>> read/write channels in a platform. So adding this change to provide
>> read/write channels count and also provide "EDMA_MF_HDMA_NATIVE"
>> flag to support HDMA for 8775 platform.
>>
>> 8775 has IP version 1.34.0 so intruduce a new cfg(cfg_1_34_0) for
>> this platform. Add struct qcom_pcie_ep_cfg as match data. Assign
>> hdma_supported flag into struct qcom_pcie_ep_cfg and set it true
>> in cfg_1_34_0.
>>
>> Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
>> ---
>>   drivers/pci/controller/dwc/pcie-qcom-ep.c | 19 ++++++++++++++++++-
>>   1 file changed, 18 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
>> index 45008e0..8d56435 100644
>> --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
>> +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
>> @@ -149,6 +149,10 @@ enum qcom_pcie_ep_link_status {
>>   	QCOM_PCIE_EP_LINK_DOWN,
>>   };
>>   
> Add kdoc comment please as like the below struct.
>
>> +struct qcom_pcie_ep_cfg {
>> +	bool hdma_supported;
>> +};
>> +
>>   /**
>>    * struct qcom_pcie_ep - Qualcomm PCIe Endpoint Controller
>>    * @pci: Designware PCIe controller struct
>> @@ -167,6 +171,7 @@ enum qcom_pcie_ep_link_status {
>>    * @num_clks: PCIe clocks count
>>    * @perst_en: Flag for PERST enable
>>    * @perst_sep_en: Flag for PERST separation enable
>> + * @cfg: PCIe EP config struct
>>    * @link_status: PCIe Link status
>>    * @global_irq: Qualcomm PCIe specific Global IRQ
>>    * @perst_irq: PERST# IRQ
>> @@ -194,6 +199,7 @@ struct qcom_pcie_ep {
>>   	u32 perst_en;
>>   	u32 perst_sep_en;
>>   
>> +	const struct qcom_pcie_ep_cfg *cfg;
>>   	enum qcom_pcie_ep_link_status link_status;
>>   	int global_irq;
>>   	int perst_irq;
>> @@ -511,6 +517,10 @@ static void qcom_pcie_perst_assert(struct dw_pcie *pci)
>>   	pcie_ep->link_status = QCOM_PCIE_EP_LINK_DISABLED;
>>   }
>>   
>> +static const struct qcom_pcie_ep_cfg cfg_1_34_0 = {
>> +	.hdma_supported = true,
>> +};
>> +
>>   /* Common DWC controller ops */
>>   static const struct dw_pcie_ops pci_ops = {
>>   	.link_up = qcom_pcie_dw_link_up,
>> @@ -816,6 +826,13 @@ static int qcom_pcie_ep_probe(struct platform_device *pdev)
>>   	pcie_ep->pci.ops = &pci_ops;
>>   	pcie_ep->pci.ep.ops = &pci_ep_ops;
>>   	pcie_ep->pci.edma.nr_irqs = 1;
>> +
>> +	pcie_ep->cfg = of_device_get_match_data(dev);
> Why do you want to cache "cfg" since it is only used in probe()?

Yes Mani, no need to cache "cfg" we can use directly here .

>> +	if (pcie_ep->cfg && pcie_ep->cfg->hdma_supported) {
>> +		pcie_ep->pci.edma.ll_wr_cnt = 1;
>> +		pcie_ep->pci.edma.ll_rd_cnt = 1;
> Is the platform really has a single r/w channel?
the platform has 8 r/w channels. but as per the use case we need to use 
single r/w channel.
> - Mani
Thanks,
Mrinmay
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 45008e0..8d56435 100644
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -149,6 +149,10 @@  enum qcom_pcie_ep_link_status {
 	QCOM_PCIE_EP_LINK_DOWN,
 };
 
+struct qcom_pcie_ep_cfg {
+	bool hdma_supported;
+};
+
 /**
  * struct qcom_pcie_ep - Qualcomm PCIe Endpoint Controller
  * @pci: Designware PCIe controller struct
@@ -167,6 +171,7 @@  enum qcom_pcie_ep_link_status {
  * @num_clks: PCIe clocks count
  * @perst_en: Flag for PERST enable
  * @perst_sep_en: Flag for PERST separation enable
+ * @cfg: PCIe EP config struct
  * @link_status: PCIe Link status
  * @global_irq: Qualcomm PCIe specific Global IRQ
  * @perst_irq: PERST# IRQ
@@ -194,6 +199,7 @@  struct qcom_pcie_ep {
 	u32 perst_en;
 	u32 perst_sep_en;
 
+	const struct qcom_pcie_ep_cfg *cfg;
 	enum qcom_pcie_ep_link_status link_status;
 	int global_irq;
 	int perst_irq;
@@ -511,6 +517,10 @@  static void qcom_pcie_perst_assert(struct dw_pcie *pci)
 	pcie_ep->link_status = QCOM_PCIE_EP_LINK_DISABLED;
 }
 
+static const struct qcom_pcie_ep_cfg cfg_1_34_0 = {
+	.hdma_supported = true,
+};
+
 /* Common DWC controller ops */
 static const struct dw_pcie_ops pci_ops = {
 	.link_up = qcom_pcie_dw_link_up,
@@ -816,6 +826,13 @@  static int qcom_pcie_ep_probe(struct platform_device *pdev)
 	pcie_ep->pci.ops = &pci_ops;
 	pcie_ep->pci.ep.ops = &pci_ep_ops;
 	pcie_ep->pci.edma.nr_irqs = 1;
+
+	pcie_ep->cfg = of_device_get_match_data(dev);
+	if (pcie_ep->cfg && pcie_ep->cfg->hdma_supported) {
+		pcie_ep->pci.edma.ll_wr_cnt = 1;
+		pcie_ep->pci.edma.ll_rd_cnt = 1;
+		pcie_ep->pci.edma.mf = EDMA_MF_HDMA_NATIVE;
+	}
 	platform_set_drvdata(pdev, pcie_ep);
 
 	ret = qcom_pcie_ep_get_resources(pdev, pcie_ep);
@@ -875,7 +892,7 @@  static void qcom_pcie_ep_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_pcie_ep_match[] = {
-	{ .compatible = "qcom,sa8775p-pcie-ep", },
+	{ .compatible = "qcom,sa8775p-pcie-ep", .data = &cfg_1_34_0},
 	{ .compatible = "qcom,sdx55-pcie-ep", },
 	{ .compatible = "qcom,sm8450-pcie-ep", },
 	{ }