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path: root/drivers/pci/pcie
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Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/Kconfig7
-rw-r--r--drivers/pci/pcie/aer/aer_inject.c90
-rw-r--r--drivers/pci/pcie/pme.c11
3 files changed, 73 insertions, 35 deletions
diff --git a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig
index e294713c8..72db7f420 100644
--- a/drivers/pci/pcie/Kconfig
+++ b/drivers/pci/pcie/Kconfig
@@ -44,6 +44,7 @@ config PCIEASPM
/sys/module/pcie_aspm/parameters/policy
When in doubt, say Y.
+
config PCIEASPM_DEBUG
bool "Debug PCI Express ASPM"
depends on PCIEASPM
@@ -58,20 +59,20 @@ choice
depends on PCIEASPM
config PCIEASPM_DEFAULT
- bool "BIOS default"
+ bool "BIOS default"
depends on PCIEASPM
help
Use the BIOS defaults for PCI Express ASPM.
config PCIEASPM_POWERSAVE
- bool "Powersave"
+ bool "Powersave"
depends on PCIEASPM
help
Enable PCI Express ASPM L0s and L1 where possible, even if the
BIOS did not.
config PCIEASPM_PERFORMANCE
- bool "Performance"
+ bool "Performance"
depends on PCIEASPM
help
Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.
diff --git a/drivers/pci/pcie/aer/aer_inject.c b/drivers/pci/pcie/aer/aer_inject.c
index 20db79046..db553dc22 100644
--- a/drivers/pci/pcie/aer/aer_inject.c
+++ b/drivers/pci/pcie/aer/aer_inject.c
@@ -25,6 +25,7 @@
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/stddef.h>
+#include <linux/device.h>
#include "aerdrv.h"
/* Override the existing corrected and uncorrected error masks */
@@ -124,16 +125,13 @@ static struct pci_ops *__find_pci_bus_ops(struct pci_bus *bus)
static struct pci_bus_ops *pci_bus_ops_pop(void)
{
unsigned long flags;
- struct pci_bus_ops *bus_ops = NULL;
+ struct pci_bus_ops *bus_ops;
spin_lock_irqsave(&inject_lock, flags);
- if (list_empty(&pci_bus_ops_list))
- bus_ops = NULL;
- else {
- struct list_head *lh = pci_bus_ops_list.next;
- list_del(lh);
- bus_ops = list_entry(lh, struct pci_bus_ops, list);
- }
+ bus_ops = list_first_entry_or_null(&pci_bus_ops_list,
+ struct pci_bus_ops, list);
+ if (bus_ops)
+ list_del(&bus_ops->list);
spin_unlock_irqrestore(&inject_lock, flags);
return bus_ops;
}
@@ -181,14 +179,16 @@ static u32 *find_pci_config_dword(struct aer_error *err, int where,
return target;
}
-static int pci_read_aer(struct pci_bus *bus, unsigned int devfn, int where,
- int size, u32 *val)
+static int aer_inj_read_config(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
{
u32 *sim;
struct aer_error *err;
unsigned long flags;
struct pci_ops *ops;
+ struct pci_ops *my_ops;
int domain;
+ int rv;
spin_lock_irqsave(&inject_lock, flags);
if (size != sizeof(u32))
@@ -208,19 +208,32 @@ static int pci_read_aer(struct pci_bus *bus, unsigned int devfn, int where,
}
out:
ops = __find_pci_bus_ops(bus);
+ /*
+ * pci_lock must already be held, so we can directly
+ * manipulate bus->ops. Many config access functions,
+ * including pci_generic_config_read() require the original
+ * bus->ops be installed to function, so temporarily put them
+ * back.
+ */
+ my_ops = bus->ops;
+ bus->ops = ops;
+ rv = ops->read(bus, devfn, where, size, val);
+ bus->ops = my_ops;
spin_unlock_irqrestore(&inject_lock, flags);
- return ops->read(bus, devfn, where, size, val);
+ return rv;
}
-static int pci_write_aer(struct pci_bus *bus, unsigned int devfn, int where,
- int size, u32 val)
+static int aer_inj_write_config(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
{
u32 *sim;
struct aer_error *err;
unsigned long flags;
int rw1cs;
struct pci_ops *ops;
+ struct pci_ops *my_ops;
int domain;
+ int rv;
spin_lock_irqsave(&inject_lock, flags);
if (size != sizeof(u32))
@@ -243,13 +256,24 @@ static int pci_write_aer(struct pci_bus *bus, unsigned int devfn, int where,
}
out:
ops = __find_pci_bus_ops(bus);
+ /*
+ * pci_lock must already be held, so we can directly
+ * manipulate bus->ops. Many config access functions,
+ * including pci_generic_config_write() require the original
+ * bus->ops be installed to function, so temporarily put them
+ * back.
+ */
+ my_ops = bus->ops;
+ bus->ops = ops;
+ rv = ops->write(bus, devfn, where, size, val);
+ bus->ops = my_ops;
spin_unlock_irqrestore(&inject_lock, flags);
- return ops->write(bus, devfn, where, size, val);
+ return rv;
}
-static struct pci_ops pci_ops_aer = {
- .read = pci_read_aer,
- .write = pci_write_aer,
+static struct pci_ops aer_inj_pci_ops = {
+ .read = aer_inj_read_config,
+ .write = aer_inj_write_config,
};
static void pci_bus_ops_init(struct pci_bus_ops *bus_ops,
@@ -270,9 +294,9 @@ static int pci_bus_set_aer_ops(struct pci_bus *bus)
bus_ops = kmalloc(sizeof(*bus_ops), GFP_KERNEL);
if (!bus_ops)
return -ENOMEM;
- ops = pci_bus_set_ops(bus, &pci_ops_aer);
+ ops = pci_bus_set_ops(bus, &aer_inj_pci_ops);
spin_lock_irqsave(&inject_lock, flags);
- if (ops == &pci_ops_aer)
+ if (ops == &aer_inj_pci_ops)
goto out;
pci_bus_ops_init(bus_ops, bus, ops);
list_add(&bus_ops->list, &pci_bus_ops_list);
@@ -334,13 +358,15 @@ static int aer_inject(struct aer_error_inj *einj)
return -ENODEV;
rpdev = pcie_find_root_port(dev);
if (!rpdev) {
+ dev_err(&dev->dev, "aer_inject: Root port not found\n");
ret = -ENODEV;
goto out_put;
}
pos_cap_err = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (!pos_cap_err) {
- ret = -EPERM;
+ dev_err(&dev->dev, "aer_inject: Device doesn't support AER\n");
+ ret = -EPROTONOSUPPORT;
goto out_put;
}
pci_read_config_dword(dev, pos_cap_err + PCI_ERR_UNCOR_SEVER, &sever);
@@ -350,7 +376,9 @@ static int aer_inject(struct aer_error_inj *einj)
rp_pos_cap_err = pci_find_ext_capability(rpdev, PCI_EXT_CAP_ID_ERR);
if (!rp_pos_cap_err) {
- ret = -EPERM;
+ dev_err(&rpdev->dev,
+ "aer_inject: Root port doesn't support AER\n");
+ ret = -EPROTONOSUPPORT;
goto out_put;
}
@@ -397,14 +425,16 @@ static int aer_inject(struct aer_error_inj *einj)
if (!aer_mask_override && einj->cor_status &&
!(einj->cor_status & ~cor_mask)) {
ret = -EINVAL;
- printk(KERN_WARNING "The correctable error(s) is masked by device\n");
+ dev_warn(&dev->dev,
+ "aer_inject: The correctable error(s) is masked by device\n");
spin_unlock_irqrestore(&inject_lock, flags);
goto out_put;
}
if (!aer_mask_override && einj->uncor_status &&
!(einj->uncor_status & ~uncor_mask)) {
ret = -EINVAL;
- printk(KERN_WARNING "The uncorrectable error(s) is masked by device\n");
+ dev_warn(&dev->dev,
+ "aer_inject: The uncorrectable error(s) is masked by device\n");
spin_unlock_irqrestore(&inject_lock, flags);
goto out_put;
}
@@ -457,13 +487,19 @@ static int aer_inject(struct aer_error_inj *einj)
if (find_aer_device(rpdev, &edev)) {
if (!get_service_data(edev)) {
- printk(KERN_WARNING "AER service is not initialized\n");
- ret = -EINVAL;
+ dev_warn(&edev->device,
+ "aer_inject: AER service is not initialized\n");
+ ret = -EPROTONOSUPPORT;
goto out_put;
}
+ dev_info(&edev->device,
+ "aer_inject: Injecting errors %08x/%08x into device %s\n",
+ einj->cor_status, einj->uncor_status, pci_name(dev));
aer_irq(-1, edev);
- } else
- ret = -EINVAL;
+ } else {
+ dev_err(&rpdev->dev, "aer_inject: AER device not found\n");
+ ret = -ENODEV;
+ }
out_put:
kfree(err_alloc);
kfree(rperr_alloc);
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 63fc63911..1ae4c73e7 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -396,7 +396,7 @@ static int pcie_pme_suspend(struct pcie_device *srv)
{
struct pcie_pme_service_data *data = get_service_data(srv);
struct pci_dev *port = srv->port;
- bool wakeup;
+ bool wakeup, wake_irq_enabled = false;
int ret;
if (device_may_wakeup(&port->dev)) {
@@ -409,11 +409,12 @@ static int pcie_pme_suspend(struct pcie_device *srv)
spin_lock_irq(&data->lock);
if (wakeup) {
ret = enable_irq_wake(srv->irq);
- data->suspend_level = PME_SUSPEND_WAKEUP;
+ if (ret == 0) {
+ data->suspend_level = PME_SUSPEND_WAKEUP;
+ wake_irq_enabled = true;
+ }
}
- if (!wakeup || ret) {
- struct pci_dev *port = srv->port;
-
+ if (!wake_irq_enabled) {
pcie_pme_interrupt_enable(port, false);
pcie_clear_root_pme_status(port);
data->suspend_level = PME_SUSPEND_NOIRQ;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 16:37:19 +0000