diff mbox series

[V2,7/9] PCI/AER: Add RCEC AER handling

Message ID 20200804194052.193272-8-sean.v.kelley@intel.com
State New
Headers show
Series Add RCEC handling to PCI/AER | expand

Commit Message

Sean V Kelley Aug. 4, 2020, 7:40 p.m. UTC
The Root Complex Event Collectors(RCEC) appear as peers to Root Ports
and also have the AER capability. So add RCEC support to the current AER
service driver and attach the AER service driver to the RCEC device.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
---
 drivers/pci/pcie/aer.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

Comments

Jonathan Cameron Aug. 5, 2020, 5:49 p.m. UTC | #1
On Tue, 4 Aug 2020 12:40:50 -0700
Sean V Kelley <sean.v.kelley@intel.com> wrote:

> The Root Complex Event Collectors(RCEC) appear as peers to Root Ports
> and also have the AER capability. So add RCEC support to the current AER
> service driver and attach the AER service driver to the RCEC device.
> 
> Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
> Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>

Looks good to me.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/pci/pcie/aer.c | 27 ++++++++++++++++++++-------
>  1 file changed, 20 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index f658607e8e00..55ee9518368f 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -300,7 +300,7 @@ int pci_aer_raw_clear_status(struct pci_dev *dev)
>  		return -EIO;
>  
>  	port_type = pci_pcie_type(dev);
> -	if (port_type == PCI_EXP_TYPE_ROOT_PORT) {
> +	if (port_type == PCI_EXP_TYPE_ROOT_PORT || port_type == PCI_EXP_TYPE_RC_EC) {
>  		pci_read_config_dword(dev, aer + PCI_ERR_ROOT_STATUS, &status);
>  		pci_write_config_dword(dev, aer + PCI_ERR_ROOT_STATUS, status);
>  	}
> @@ -595,7 +595,8 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
>  	if ((a == &dev_attr_aer_rootport_total_err_cor.attr ||
>  	     a == &dev_attr_aer_rootport_total_err_fatal.attr ||
>  	     a == &dev_attr_aer_rootport_total_err_nonfatal.attr) &&
> -	    pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
> +	    ((pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) &&
> +	    (pci_pcie_type(pdev) != PCI_EXP_TYPE_RC_EC)))
>  		return 0;
>  
>  	return a->mode;
> @@ -916,7 +917,10 @@ static bool find_source_device(struct pci_dev *parent,
>  	if (result)
>  		return true;
>  
> -	pci_walk_bus(parent->subordinate, find_device_iter, e_info);
> +	if (pci_pcie_type(parent) == PCI_EXP_TYPE_RC_EC)
> +		pcie_walk_rcec(parent, find_device_iter, e_info);
> +	else
> +		pci_walk_bus(parent->subordinate, find_device_iter, e_info);
>  
>  	if (!e_info->error_dev_num) {
>  		pci_info(parent, "can't find device of ID%04x\n", e_info->id);
> @@ -1053,6 +1057,7 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
>  		if (!(info->status & ~info->mask))
>  			return 0;
>  	} else if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
> +		   pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC ||
>  	           pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM ||
>  		   info->severity == AER_NONFATAL) {
>  
> @@ -1205,6 +1210,7 @@ static int set_device_error_reporting(struct pci_dev *dev, void *data)
>  	int type = pci_pcie_type(dev);
>  
>  	if ((type == PCI_EXP_TYPE_ROOT_PORT) ||
> +	    (type == PCI_EXP_TYPE_RC_EC) ||
>  	    (type == PCI_EXP_TYPE_UPSTREAM) ||
>  	    (type == PCI_EXP_TYPE_DOWNSTREAM)) {
>  		if (enable)
> @@ -1229,9 +1235,11 @@ static void set_downstream_devices_error_reporting(struct pci_dev *dev,
>  {
>  	set_device_error_reporting(dev, &enable);
>  
> -	if (!dev->subordinate)
> -		return;
> -	pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
> +	if (pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC)
> +		pcie_walk_rcec(dev, set_device_error_reporting, &enable);
> +	else if (dev->subordinate)
> +		pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
> +
>  }
>  
>  /**
> @@ -1329,6 +1337,11 @@ static int aer_probe(struct pcie_device *dev)
>  	struct device *device = &dev->device;
>  	struct pci_dev *port = dev->port;
>  
> +	/* Limit to Root Ports or Root Complex Event Collectors */
> +	if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) &&
> +	    (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT))
> +		return -ENODEV;
> +
>  	rpc = devm_kzalloc(device, sizeof(struct aer_rpc), GFP_KERNEL);
>  	if (!rpc)
>  		return -ENOMEM;
> @@ -1385,7 +1398,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
>  
>  static struct pcie_port_service_driver aerdriver = {
>  	.name		= "aer",
> -	.port_type	= PCI_EXP_TYPE_ROOT_PORT,
> +	.port_type	= PCIE_ANY_PORT,
>  	.service	= PCIE_PORT_SERVICE_AER,
>  
>  	.probe		= aer_probe,
diff mbox series

Patch

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index f658607e8e00..55ee9518368f 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -300,7 +300,7 @@  int pci_aer_raw_clear_status(struct pci_dev *dev)
 		return -EIO;
 
 	port_type = pci_pcie_type(dev);
-	if (port_type == PCI_EXP_TYPE_ROOT_PORT) {
+	if (port_type == PCI_EXP_TYPE_ROOT_PORT || port_type == PCI_EXP_TYPE_RC_EC) {
 		pci_read_config_dword(dev, aer + PCI_ERR_ROOT_STATUS, &status);
 		pci_write_config_dword(dev, aer + PCI_ERR_ROOT_STATUS, status);
 	}
@@ -595,7 +595,8 @@  static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
 	if ((a == &dev_attr_aer_rootport_total_err_cor.attr ||
 	     a == &dev_attr_aer_rootport_total_err_fatal.attr ||
 	     a == &dev_attr_aer_rootport_total_err_nonfatal.attr) &&
-	    pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
+	    ((pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT) &&
+	    (pci_pcie_type(pdev) != PCI_EXP_TYPE_RC_EC)))
 		return 0;
 
 	return a->mode;
@@ -916,7 +917,10 @@  static bool find_source_device(struct pci_dev *parent,
 	if (result)
 		return true;
 
-	pci_walk_bus(parent->subordinate, find_device_iter, e_info);
+	if (pci_pcie_type(parent) == PCI_EXP_TYPE_RC_EC)
+		pcie_walk_rcec(parent, find_device_iter, e_info);
+	else
+		pci_walk_bus(parent->subordinate, find_device_iter, e_info);
 
 	if (!e_info->error_dev_num) {
 		pci_info(parent, "can't find device of ID%04x\n", e_info->id);
@@ -1053,6 +1057,7 @@  int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 		if (!(info->status & ~info->mask))
 			return 0;
 	} else if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
+		   pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC ||
 	           pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM ||
 		   info->severity == AER_NONFATAL) {
 
@@ -1205,6 +1210,7 @@  static int set_device_error_reporting(struct pci_dev *dev, void *data)
 	int type = pci_pcie_type(dev);
 
 	if ((type == PCI_EXP_TYPE_ROOT_PORT) ||
+	    (type == PCI_EXP_TYPE_RC_EC) ||
 	    (type == PCI_EXP_TYPE_UPSTREAM) ||
 	    (type == PCI_EXP_TYPE_DOWNSTREAM)) {
 		if (enable)
@@ -1229,9 +1235,11 @@  static void set_downstream_devices_error_reporting(struct pci_dev *dev,
 {
 	set_device_error_reporting(dev, &enable);
 
-	if (!dev->subordinate)
-		return;
-	pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
+	if (pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC)
+		pcie_walk_rcec(dev, set_device_error_reporting, &enable);
+	else if (dev->subordinate)
+		pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
+
 }
 
 /**
@@ -1329,6 +1337,11 @@  static int aer_probe(struct pcie_device *dev)
 	struct device *device = &dev->device;
 	struct pci_dev *port = dev->port;
 
+	/* Limit to Root Ports or Root Complex Event Collectors */
+	if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) &&
+	    (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT))
+		return -ENODEV;
+
 	rpc = devm_kzalloc(device, sizeof(struct aer_rpc), GFP_KERNEL);
 	if (!rpc)
 		return -ENOMEM;
@@ -1385,7 +1398,7 @@  static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
 
 static struct pcie_port_service_driver aerdriver = {
 	.name		= "aer",
-	.port_type	= PCI_EXP_TYPE_ROOT_PORT,
+	.port_type	= PCIE_ANY_PORT,
 	.service	= PCIE_PORT_SERVICE_AER,
 
 	.probe		= aer_probe,