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Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/portdrv.h5
-rw-r--r--drivers/pci/pcie/portdrv_core.c95
2 files changed, 39 insertions, 61 deletions
diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index 2529f3f2ea5..b0dcbc73415 100644
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -28,8 +28,9 @@
#define get_descriptor_id(type, service) (((type - 4) << 4) | service)
-struct pcie_port_device_ext {
- int interrupt_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
+struct pcie_port_data {
+ int port_type; /* Type of the port */
+ int port_irq_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
};
extern struct bus_type pcie_port_bus_type;
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 8b3f8c18032..273e97619bc 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -15,10 +15,9 @@
#include <linux/slab.h>
#include <linux/pcieport_if.h>
+#include "../pci.h"
#include "portdrv.h"
-extern int pcie_mch_quirk; /* MSI-quirk Indicator */
-
/**
* release_pcie_device - free PCI Express port service device structure
* @dev: Port service device to release
@@ -31,28 +30,6 @@ static void release_pcie_device(struct device *dev)
kfree(to_pcie_device(dev));
}
-static int is_msi_quirked(struct pci_dev *dev)
-{
- int port_type, quirk = 0;
- u16 reg16;
-
- pci_read_config_word(dev,
- pci_find_capability(dev, PCI_CAP_ID_EXP) +
- PCIE_CAPABILITIES_REG, &reg16);
- port_type = (reg16 >> 4) & PORT_TYPE_MASK;
- switch(port_type) {
- case PCIE_RC_PORT:
- if (pcie_mch_quirk == 1)
- quirk = 1;
- break;
- case PCIE_SW_UPSTREAM_PORT:
- case PCIE_SW_DOWNSTREAM_PORT:
- default:
- break;
- }
- return quirk;
-}
-
/**
* assign_interrupt_mode - choose interrupt mode for PCI Express port services
* (INTx, MSI-X, MSI) and set up vectors
@@ -64,6 +41,7 @@ static int is_msi_quirked(struct pci_dev *dev)
*/
static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
{
+ struct pcie_port_data *port_data = pci_get_drvdata(dev);
int i, pos, nvec, status = -EINVAL;
int interrupt_mode = PCIE_PORT_INTx_MODE;
@@ -75,7 +53,7 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
}
/* Check MSI quirk */
- if (is_msi_quirked(dev))
+ if (port_data->port_type == PCIE_RC_PORT && pcie_mch_quirk)
return interrupt_mode;
/* Select MSI-X over MSI if supported */
@@ -132,13 +110,11 @@ static int get_port_device_capability(struct pci_dev *dev)
pos + PCIE_SLOT_CAPABILITIES_REG, &reg32);
if (reg32 & SLOT_HP_CAPABLE_MASK)
services |= PCIE_PORT_SERVICE_HP;
- }
- /* PME Capable - root port capability */
- if (((reg16 >> 4) & PORT_TYPE_MASK) == PCIE_RC_PORT)
- services |= PCIE_PORT_SERVICE_PME;
-
+ }
+ /* AER capable */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))
services |= PCIE_PORT_SERVICE_AER;
+ /* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
@@ -152,15 +128,15 @@ static int get_port_device_capability(struct pci_dev *dev)
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
- * @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
- int port_type, int service_type, int irq, int irq_mode)
+ int service_type, int irq)
{
+ struct pcie_port_data *port_data = pci_get_drvdata(parent);
struct device *device;
+ int port_type = port_data->port_type;
dev->port = parent;
- dev->interrupt_mode = irq_mode;
dev->irq = irq;
dev->id.vendor = parent->vendor;
dev->id.device = parent->device;
@@ -185,10 +161,9 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
- * @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
- int port_type, int service_type, int irq, int irq_mode)
+ int service_type, int irq)
{
struct pcie_device *device;
@@ -196,7 +171,7 @@ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
if (!device)
return NULL;
- pcie_device_init(parent, device, port_type, service_type, irq,irq_mode);
+ pcie_device_init(parent, device, service_type, irq);
return device;
}
@@ -230,39 +205,36 @@ int pcie_port_device_probe(struct pci_dev *dev)
*/
int pcie_port_device_register(struct pci_dev *dev)
{
- struct pcie_port_device_ext *p_ext;
- int status, type, capabilities, irq_mode, i;
+ struct pcie_port_data *port_data;
+ int status, capabilities, irq_mode, i;
int vectors[PCIE_PORT_DEVICE_MAXSERVICES];
u16 reg16;
- /* Allocate port device extension */
- if (!(p_ext = kmalloc(sizeof(struct pcie_port_device_ext), GFP_KERNEL)))
+ port_data = kzalloc(sizeof(*port_data), GFP_KERNEL);
+ if (!port_data)
return -ENOMEM;
-
- pci_set_drvdata(dev, p_ext);
+ pci_set_drvdata(dev, port_data);
/* Get port type */
pci_read_config_word(dev,
pci_find_capability(dev, PCI_CAP_ID_EXP) +
PCIE_CAPABILITIES_REG, &reg16);
- type = (reg16 >> 4) & PORT_TYPE_MASK;
+ port_data->port_type = (reg16 >> 4) & PORT_TYPE_MASK;
- /* Now get port services */
capabilities = get_port_device_capability(dev);
+ /* Root ports are capable of generating PME too */
+ if (port_data->port_type == PCIE_RC_PORT)
+ capabilities |= PCIE_PORT_SERVICE_PME;
+
irq_mode = assign_interrupt_mode(dev, vectors, capabilities);
- p_ext->interrupt_mode = irq_mode;
+ port_data->port_irq_mode = irq_mode;
/* Allocate child services if any */
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
struct pcie_device *child;
if (capabilities & (1 << i)) {
- child = alloc_pcie_device(
- dev, /* parent */
- type, /* port type */
- i, /* service type */
- vectors[i], /* irq */
- irq_mode /* interrupt mode */);
+ child = alloc_pcie_device(dev, i, vectors[i]);
if (child) {
status = device_register(&child->device);
if (status) {
@@ -349,25 +321,30 @@ static int remove_iter(struct device *dev, void *data)
*/
void pcie_port_device_remove(struct pci_dev *dev)
{
- struct device *device;
- unsigned long device_addr;
- int interrupt_mode = PCIE_PORT_INTx_MODE;
+ struct pcie_port_data *port_data = pci_get_drvdata(dev);
int status;
do {
+ unsigned long device_addr;
+
status = device_for_each_child(&dev->dev, &device_addr, remove_iter);
if (status) {
- device = (struct device*)device_addr;
- interrupt_mode = (to_pcie_device(device))->interrupt_mode;
+ struct device *device = (struct device*)device_addr;
put_device(device);
device_unregister(device);
}
} while (status);
- /* Switch to INTx by default if MSI enabled */
- if (interrupt_mode == PCIE_PORT_MSIX_MODE)
+
+ switch (port_data->port_irq_mode) {
+ case PCIE_PORT_MSIX_MODE:
pci_disable_msix(dev);
- else if (interrupt_mode == PCIE_PORT_MSI_MODE)
+ break;
+ case PCIE_PORT_MSI_MODE:
pci_disable_msi(dev);
+ break;
+ }
+
+ kfree(port_data);
}
/**
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-17 09:19:36 +0000