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PCI: Change the type of probe argument in reset functions

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Change the type of probe argument in functions which implement reset
methods from int to bool to make the context and intent clear.

Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20210817180500.1253-10-ameynarkhede03@gmail.com
Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Amey Narkhede 2021-08-17 23:35:00 +05:30 committed by Bjorn Helgaas
parent 6937b7dd43
commit 9bdc81ce44
12 changed files with 51 additions and 48 deletions
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2
drivers/crypto/cavium/nitrox/nitrox_main.c
View File

@ -306,7 +306,7 @@ static int nitrox_device_flr(struct pci_dev *pdev)
return -ENOMEM;
}
pcie_reset_flr(pdev, 0);
pcie_reset_flr(pdev, PCI_RESET_DO_RESET);
pci_restore_state(pdev);

2
drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
View File

@ -526,7 +526,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
oct->irq_name_storage = NULL;
}
/* Soft reset the octeon device before exiting */
if (!pcie_reset_flr(oct->pci_dev, 1))
if (!pcie_reset_flr(oct->pci_dev, PCI_RESET_PROBE))
octeon_pci_flr(oct);
else
cn23xx_vf_ask_pf_to_do_flr(oct);

2
drivers/pci/hotplug/pciehp.h
View File

@ -184,7 +184,7 @@ void pciehp_release_ctrl(struct controller *ctrl);
int pciehp_sysfs_enable_slot(struct hotplug_slot *hotplug_slot);
int pciehp_sysfs_disable_slot(struct hotplug_slot *hotplug_slot);
int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, int probe);
int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, bool probe);
int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status);
int pciehp_set_raw_indicator_status(struct hotplug_slot *h_slot, u8 status);
int pciehp_get_raw_indicator_status(struct hotplug_slot *h_slot, u8 *status);

2
drivers/pci/hotplug/pciehp_hpc.c
View File

@ -870,7 +870,7 @@ void pcie_disable_interrupt(struct controller *ctrl)
* momentarily, if we see that they could interfere. Also, clear any spurious
* events after.
*/
int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, int probe)
int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, bool probe)
{
struct controller *ctrl = to_ctrl(hotplug_slot);
struct pci_dev *pdev = ctrl_dev(ctrl);

2
drivers/pci/hotplug/pnv_php.c
View File

@ -526,7 +526,7 @@ scan:
return 0;
}
static int pnv_php_reset_slot(struct hotplug_slot *slot, int probe)
static int pnv_php_reset_slot(struct hotplug_slot *slot, bool probe)
{
struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
struct pci_dev *bridge = php_slot->pdev;

4
drivers/pci/pci-acpi.c
View File

@ -944,9 +944,9 @@ void pci_set_acpi_fwnode(struct pci_dev *dev)
/**
* pci_dev_acpi_reset - do a function level reset using _RST method
* @dev: device to reset
* @probe: check if _RST method is included in the acpi_device context.
* @probe: if true, return 0 if device supports _RST
*/
int pci_dev_acpi_reset(struct pci_dev *dev, int probe)
int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
{
acpi_handle handle = ACPI_HANDLE(&dev->dev);

44
drivers/pci/pci.c
View File

@ -4658,11 +4658,11 @@ EXPORT_SYMBOL_GPL(pcie_flr);
/**
* pcie_reset_flr - initiate a PCIe function level reset
* @dev: device to reset
* @probe: If set, only check if the device can be reset this way.
* @probe: if true, return 0 if device can be reset this way
*
* Initiate a function level reset on @dev.
*/
int pcie_reset_flr(struct pci_dev *dev, int probe)
int pcie_reset_flr(struct pci_dev *dev, bool probe)
{
if (dev->dev_flags & PCI_DEV_FLAGS_NO_FLR_RESET)
return -ENOTTY;
@ -4677,7 +4677,7 @@ int pcie_reset_flr(struct pci_dev *dev, int probe)
}
EXPORT_SYMBOL_GPL(pcie_reset_flr);
static int pci_af_flr(struct pci_dev *dev, int probe)
static int pci_af_flr(struct pci_dev *dev, bool probe)
{
int pos;
u8 cap;
@ -4724,7 +4724,7 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
/**
* pci_pm_reset - Put device into PCI_D3 and back into PCI_D0.
* @dev: Device to reset.
* @probe: If set, only check if the device can be reset this way.
* @probe: if true, return 0 if the device can be reset this way.
*
* If @dev supports native PCI PM and its PCI_PM_CTRL_NO_SOFT_RESET flag is
* unset, it will be reinitialized internally when going from PCI_D3hot to
@ -4736,7 +4736,7 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
* by default (i.e. unless the @dev's d3hot_delay field has a different value).
* Moreover, only devices in D0 can be reset by this function.
*/
static int pci_pm_reset(struct pci_dev *dev, int probe)
static int pci_pm_reset(struct pci_dev *dev, bool probe)
{
u16 csr;
@ -4996,7 +4996,7 @@ int pci_bridge_secondary_bus_reset(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_bridge_secondary_bus_reset);
static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
static int pci_parent_bus_reset(struct pci_dev *dev, bool probe)
{
struct pci_dev *pdev;
@ -5014,7 +5014,7 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
return pci_bridge_secondary_bus_reset(dev->bus->self);
}
static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe)
static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, bool probe)
{
int rc = -ENOTTY;
@ -5029,7 +5029,7 @@ static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe)
return rc;
}
static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
static int pci_dev_reset_slot_function(struct pci_dev *dev, bool probe)
{
if (dev->multifunction || dev->subordinate || !dev->slot ||
dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET)
@ -5038,7 +5038,7 @@ static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
return pci_reset_hotplug_slot(dev->slot->hotplug, probe);
}
static int pci_reset_bus_function(struct pci_dev *dev, int probe)
static int pci_reset_bus_function(struct pci_dev *dev, bool probe)
{
int rc;
@ -5204,7 +5204,7 @@ static ssize_t reset_method_store(struct device *dev,
goto error;
}
if (pci_reset_fn_methods[m].reset_fn(pdev, 1)) {
if (pci_reset_fn_methods[m].reset_fn(pdev, PCI_RESET_PROBE)) {
pci_err(pdev, "Unsupported reset method '%s'", name);
goto error;
}
@ -5220,7 +5220,7 @@ static ssize_t reset_method_store(struct device *dev,
reset_methods[n] = 0;
/* Warn if dev-specific supported but not highest priority */
if (pci_reset_fn_methods[1].reset_fn(pdev, 1) == 0 &&
if (pci_reset_fn_methods[1].reset_fn(pdev, PCI_RESET_PROBE) == 0 &&
reset_methods[0] != 1)
pci_warn(pdev, "Device-specific reset disabled/de-prioritized by user");
memcpy(pdev->reset_methods, reset_methods, sizeof(pdev->reset_methods));
@ -5294,7 +5294,7 @@ int __pci_reset_function_locked(struct pci_dev *dev)
if (!m)
return -ENOTTY;
rc = pci_reset_fn_methods[m].reset_fn(dev, 0);
rc = pci_reset_fn_methods[m].reset_fn(dev, PCI_RESET_DO_RESET);
if (!rc)
return 0;
if (rc != -ENOTTY)
@ -5327,7 +5327,7 @@ void pci_init_reset_methods(struct pci_dev *dev)
i = 0;
for (m = 1; m < PCI_NUM_RESET_METHODS; m++) {
rc = pci_reset_fn_methods[m].reset_fn(dev, 1);
rc = pci_reset_fn_methods[m].reset_fn(dev, PCI_RESET_PROBE);
if (!rc)
dev->reset_methods[i++] = m;
else if (rc != -ENOTTY)
@ -5644,7 +5644,7 @@ static void pci_slot_restore_locked(struct pci_slot *slot)
}
}
static int pci_slot_reset(struct pci_slot *slot, int probe)
static int pci_slot_reset(struct pci_slot *slot, bool probe)
{
int rc;
@ -5672,7 +5672,7 @@ static int pci_slot_reset(struct pci_slot *slot, int probe)
*/
int pci_probe_reset_slot(struct pci_slot *slot)
{
return pci_slot_reset(slot, 1);
return pci_slot_reset(slot, PCI_RESET_PROBE);
}
EXPORT_SYMBOL_GPL(pci_probe_reset_slot);
@ -5695,14 +5695,14 @@ static int __pci_reset_slot(struct pci_slot *slot)
{
int rc;
rc = pci_slot_reset(slot, 1);
rc = pci_slot_reset(slot, PCI_RESET_PROBE);
if (rc)
return rc;
if (pci_slot_trylock(slot)) {
pci_slot_save_and_disable_locked(slot);
might_sleep();
rc = pci_reset_hotplug_slot(slot->hotplug, 0);
rc = pci_reset_hotplug_slot(slot->hotplug, PCI_RESET_DO_RESET);
pci_slot_restore_locked(slot);
pci_slot_unlock(slot);
} else
@ -5711,7 +5711,7 @@ static int __pci_reset_slot(struct pci_slot *slot)
return rc;
}
static int pci_bus_reset(struct pci_bus *bus, int probe)
static int pci_bus_reset(struct pci_bus *bus, bool probe)
{
int ret;
@ -5757,14 +5757,14 @@ int pci_bus_error_reset(struct pci_dev *bridge)
goto bus_reset;
list_for_each_entry(slot, &bus->slots, list)
if (pci_slot_reset(slot, 0))
if (pci_slot_reset(slot, PCI_RESET_DO_RESET))
goto bus_reset;
mutex_unlock(&pci_slot_mutex);
return 0;
bus_reset:
mutex_unlock(&pci_slot_mutex);
return pci_bus_reset(bridge->subordinate, 0);
return pci_bus_reset(bridge->subordinate, PCI_RESET_DO_RESET);
}
/**
@ -5775,7 +5775,7 @@ bus_reset:
*/
int pci_probe_reset_bus(struct pci_bus *bus)
{
return pci_bus_reset(bus, 1);
return pci_bus_reset(bus, PCI_RESET_PROBE);
}
EXPORT_SYMBOL_GPL(pci_probe_reset_bus);
@ -5789,7 +5789,7 @@ static int __pci_reset_bus(struct pci_bus *bus)
{
int rc;
rc = pci_bus_reset(bus, 1);
rc = pci_bus_reset(bus, PCI_RESET_PROBE);
if (rc)
return rc;

12
drivers/pci/pci.h
View File

@ -608,18 +608,18 @@ static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
struct pci_dev_reset_methods {
u16 vendor;
u16 device;
int (*reset)(struct pci_dev *dev, int probe);
int (*reset)(struct pci_dev *dev, bool probe);
};
struct pci_reset_fn_method {
int (*reset_fn)(struct pci_dev *pdev, int probe);
int (*reset_fn)(struct pci_dev *pdev, bool probe);
char *name;
};
#ifdef CONFIG_PCI_QUIRKS
int pci_dev_specific_reset(struct pci_dev *dev, int probe);
int pci_dev_specific_reset(struct pci_dev *dev, bool probe);
#else
static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
{
return -ENOTTY;
}
@ -708,9 +708,9 @@ static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL
int pci_acpi_program_hp_params(struct pci_dev *dev);
extern const struct attribute_group pci_dev_acpi_attr_group;
void pci_set_acpi_fwnode(struct pci_dev *dev);
int pci_dev_acpi_reset(struct pci_dev *dev, int probe);
int pci_dev_acpi_reset(struct pci_dev *dev, bool probe);
#else
static inline int pci_dev_acpi_reset(struct pci_dev *dev, int probe)
static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
{
return -ENOTTY;
}

2
drivers/pci/pcie/aer.c
View File

@ -1407,7 +1407,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
}
if (type == PCI_EXP_TYPE_RC_EC || type == PCI_EXP_TYPE_RC_END) {
rc = pcie_reset_flr(dev, 0);
rc = pcie_reset_flr(dev, PCI_RESET_DO_RESET);
if (!rc)
pci_info(dev, "has been reset\n");
else

20
drivers/pci/quirks.c
View File

@ -3702,7 +3702,7 @@ DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL,
* reset a single function if other methods (e.g. FLR, PM D0->D3) are
* not available.
*/
static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, bool probe)
{
/*
* http://www.intel.com/content/dam/doc/datasheet/82599-10-gbe-controller-datasheet.pdf
@ -3724,7 +3724,7 @@ static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
#define NSDE_PWR_STATE 0xd0100
#define IGD_OPERATION_TIMEOUT 10000 /* set timeout 10 seconds */
static int reset_ivb_igd(struct pci_dev *dev, int probe)
static int reset_ivb_igd(struct pci_dev *dev, bool probe)
{
void __iomem *mmio_base;
unsigned long timeout;
@ -3767,7 +3767,7 @@ reset_complete:
}
/* Device-specific reset method for Chelsio T4-based adapters */
static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
static int reset_chelsio_generic_dev(struct pci_dev *dev, bool probe)
{
u16 old_command;
u16 msix_flags;
@ -3845,14 +3845,14 @@ static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
* Chapter 3: NVMe control registers
* Chapter 7.3: Reset behavior
*/
static int nvme_disable_and_flr(struct pci_dev *dev, int probe)
static int nvme_disable_and_flr(struct pci_dev *dev, bool probe)
{
void __iomem *bar;
u16 cmd;
u32 cfg;
if (dev->class != PCI_CLASS_STORAGE_EXPRESS ||
pcie_reset_flr(dev, 1) || !pci_resource_start(dev, 0))
pcie_reset_flr(dev, PCI_RESET_PROBE) || !pci_resource_start(dev, 0))
return -ENOTTY;
if (probe)
@ -3919,12 +3919,12 @@ static int nvme_disable_and_flr(struct pci_dev *dev, int probe)
* device too soon after FLR. A 250ms delay after FLR has heuristically
* proven to produce reliably working results for device assignment cases.
*/
static int delay_250ms_after_flr(struct pci_dev *dev, int probe)
static int delay_250ms_after_flr(struct pci_dev *dev, bool probe)
{
if (probe)
return pcie_reset_flr(dev, 1);
return pcie_reset_flr(dev, PCI_RESET_PROBE);
pcie_reset_flr(dev, 0);
pcie_reset_flr(dev, PCI_RESET_DO_RESET);
msleep(250);
@ -3939,7 +3939,7 @@ static int delay_250ms_after_flr(struct pci_dev *dev, int probe)
#define HINIC_OPERATION_TIMEOUT 15000 /* 15 seconds */
/* Device-specific reset method for Huawei Intelligent NIC virtual functions */
static int reset_hinic_vf_dev(struct pci_dev *pdev, int probe)
static int reset_hinic_vf_dev(struct pci_dev *pdev, bool probe)
{
unsigned long timeout;
void __iomem *bar;
@ -4016,7 +4016,7 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
* because when a host assigns a device to a guest VM, the host may need
* to reset the device but probably doesn't have a driver for it.
*/
int pci_dev_specific_reset(struct pci_dev *dev, int probe)
int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
{
const struct pci_dev_reset_methods *i;

5
include/linux/pci.h
View File

@ -52,6 +52,9 @@
/* Number of reset methods used in pci_reset_fn_methods array in pci.c */
#define PCI_NUM_RESET_METHODS 7
#define PCI_RESET_PROBE true
#define PCI_RESET_DO_RESET false
/*
* The PCI interface treats multi-function devices as independent
* devices. The slot/function address of each device is encoded
@ -1234,7 +1237,7 @@ u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
enum pci_bus_speed *speed,
enum pcie_link_width *width);
void pcie_print_link_status(struct pci_dev *dev);
int pcie_reset_flr(struct pci_dev *dev, int probe);
int pcie_reset_flr(struct pci_dev *dev, bool probe);
int pcie_flr(struct pci_dev *dev);
int __pci_reset_function_locked(struct pci_dev *dev);
int pci_reset_function(struct pci_dev *dev);

2
include/linux/pci_hotplug.h
View File

@ -44,7 +44,7 @@ struct hotplug_slot_ops {
int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
int (*reset_slot) (struct hotplug_slot *slot, int probe);
int (*reset_slot) (struct hotplug_slot *slot, bool probe);
};
/**