diff mbox series

[v16,5/9] PCI/DPC: Cache DPC capabilities in pci_init_capabilities()

Message ID a3a634b6c6012773e9e668c2110e13a5bd196bb8.1582850766.git.sathyanarayanan.kuppuswamy@linux.intel.com (mailing list archive)
State Superseded, archived
Headers show
Series Add Error Disconnect Recover (EDR) support | expand

Commit Message

Kuppuswamy Sathyanarayanan Feb. 28, 2020, 12:59 a.m. UTC 
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

Since we need to re-use DPC error handling routines in Error Disconnect
Recover (EDR) driver, move the initalization and caching of DPC
capabilities to pci_init_capabilities().

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
 drivers/pci/pci.h      |  2 ++
 drivers/pci/pcie/dpc.c | 32 ++++++++++++++++++++------------
 2 files changed, 22 insertions(+), 12 deletions(-)

Comments

Bjorn Helgaas March 4, 2020, 12:47 a.m. UTC | #1 
On Thu, Feb 27, 2020 at 04:59:47PM -0800, sathyanarayanan.kuppuswamy@linux.intel.com wrote:
> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> 
> Since we need to re-use DPC error handling routines in Error Disconnect
> Recover (EDR) driver, move the initalization and caching of DPC
> capabilities to pci_init_capabilities().
> 
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> ---
>  drivers/pci/pci.h      |  2 ++
>  drivers/pci/pcie/dpc.c | 32 ++++++++++++++++++++------------
>  2 files changed, 22 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index c2c35f152cde..e57e78b619f8 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -448,9 +448,11 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
>  #ifdef CONFIG_PCIE_DPC
>  void pci_save_dpc_state(struct pci_dev *dev);
>  void pci_restore_dpc_state(struct pci_dev *dev);
> +void pci_dpc_init(struct pci_dev *pdev);
>  #else
>  static inline void pci_save_dpc_state(struct pci_dev *dev) {}
>  static inline void pci_restore_dpc_state(struct pci_dev *dev) {}
> +static inline void pci_dpc_init(struct pci_dev *pdev) {}
>  #endif
>  
>  #ifdef CONFIG_PCI_ATS
> diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
> index 114358d62ddf..57e7f94b98cf 100644
> --- a/drivers/pci/pcie/dpc.c
> +++ b/drivers/pci/pcie/dpc.c
> @@ -249,6 +249,26 @@ static irqreturn_t dpc_irq(int irq, void *context)
>  	return IRQ_HANDLED;
>  }
>  
> +void pci_dpc_init(struct pci_dev *pdev)
> +{

I think you forgot to call this?

> +	u16 cap;
> +
> +	pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
> +	if (!pdev->dpc_cap)
> +		return;
> +
> +	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
> +	pdev->dpc_rp_extensions = (cap & PCI_EXP_DPC_CAP_RP_EXT) ? 1 : 0;
> +	if (pdev->dpc_rp_extensions) {
> +		pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
> +		if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
> +			pci_err(pdev, "RP PIO log size %u is invalid\n",
> +				pdev->dpc_rp_log_size);
> +			pdev->dpc_rp_log_size = 0;
> +		}
> +	}
> +}
> +
>  #define FLAG(x, y) (((x) & (y)) ? '+' : '-')
>  static int dpc_probe(struct pcie_device *dev)
>  {
> @@ -260,8 +280,6 @@ static int dpc_probe(struct pcie_device *dev)
>  	if (pcie_aer_get_firmware_first(pdev) && !pcie_ports_dpc_native)
>  		return -ENOTSUPP;
>  
> -	pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
> -
>  	status = devm_request_threaded_irq(device, dev->irq, dpc_irq,
>  					   dpc_handler, IRQF_SHARED,
>  					   "pcie-dpc", pdev);
> @@ -274,16 +292,6 @@ static int dpc_probe(struct pcie_device *dev)
>  	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
>  	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);
>  
> -	pdev->dpc_rp_extensions = (cap & PCI_EXP_DPC_CAP_RP_EXT) ? 1 : 0;
> -	if (pdev->dpc_rp_extensions) {
> -		pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
> -		if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
> -			pci_err(pdev, "RP PIO log size %u is invalid\n",
> -				pdev->dpc_rp_log_size);
> -			pdev->dpc_rp_log_size = 0;
> -		}
> -	}
> -
>  	ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN;
>  	pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);
>  
> -- 
> 2.21.0
>
Kuppuswamy Sathyanarayanan March 4, 2020, 1:01 a.m. UTC | #2 
On 3/3/2020 4:47 PM, Bjorn Helgaas wrote:
> I think you forgot to call this?

Sorry about it. It looks like I missed adding probe.c 
pci_init_capabilities() changes. Let me fix it and send a new version.
diff mbox series

Patch

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index c2c35f152cde..e57e78b619f8 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -448,9 +448,11 @@  void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 #ifdef CONFIG_PCIE_DPC
 void pci_save_dpc_state(struct pci_dev *dev);
 void pci_restore_dpc_state(struct pci_dev *dev);
+void pci_dpc_init(struct pci_dev *pdev);
 #else
 static inline void pci_save_dpc_state(struct pci_dev *dev) {}
 static inline void pci_restore_dpc_state(struct pci_dev *dev) {}
+static inline void pci_dpc_init(struct pci_dev *pdev) {}
 #endif
 
 #ifdef CONFIG_PCI_ATS
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 114358d62ddf..57e7f94b98cf 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -249,6 +249,26 @@  static irqreturn_t dpc_irq(int irq, void *context)
 	return IRQ_HANDLED;
 }
 
+void pci_dpc_init(struct pci_dev *pdev)
+{
+	u16 cap;
+
+	pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
+	if (!pdev->dpc_cap)
+		return;
+
+	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
+	pdev->dpc_rp_extensions = (cap & PCI_EXP_DPC_CAP_RP_EXT) ? 1 : 0;
+	if (pdev->dpc_rp_extensions) {
+		pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
+		if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
+			pci_err(pdev, "RP PIO log size %u is invalid\n",
+				pdev->dpc_rp_log_size);
+			pdev->dpc_rp_log_size = 0;
+		}
+	}
+}
+
 #define FLAG(x, y) (((x) & (y)) ? '+' : '-')
 static int dpc_probe(struct pcie_device *dev)
 {
@@ -260,8 +280,6 @@  static int dpc_probe(struct pcie_device *dev)
 	if (pcie_aer_get_firmware_first(pdev) && !pcie_ports_dpc_native)
 		return -ENOTSUPP;
 
-	pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
-
 	status = devm_request_threaded_irq(device, dev->irq, dpc_irq,
 					   dpc_handler, IRQF_SHARED,
 					   "pcie-dpc", pdev);
@@ -274,16 +292,6 @@  static int dpc_probe(struct pcie_device *dev)
 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);
 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);
 
-	pdev->dpc_rp_extensions = (cap & PCI_EXP_DPC_CAP_RP_EXT) ? 1 : 0;
-	if (pdev->dpc_rp_extensions) {
-		pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
-		if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
-			pci_err(pdev, "RP PIO log size %u is invalid\n",
-				pdev->dpc_rp_log_size);
-			pdev->dpc_rp_log_size = 0;
-		}
-	}
-
 	ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN;
 	pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);