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Message-Id: <20210805162917.3989-10-ameynarkhede03@gmail.com>
Date: Thu, 5 Aug 2021 21:59:17 +0530
From: Amey Narkhede <ameynarkhede03@...il.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: alex.williamson@...hat.com,
Raphael Norwitz <raphael.norwitz@...anix.com>,
linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
kw@...ux.com, Shanker Donthineni <sdonthineni@...dia.com>,
Sinan Kaya <okaya@...nel.org>, Len Brown <lenb@...nel.org>,
"Rafael J . Wysocki" <rjw@...ysocki.net>,
Amey Narkhede <ameynarkhede03@...il.com>
Subject: [PATCH v15 9/9] PCI: Change the type of probe argument in reset functions
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@...hat.com>
Suggested-by: Krzysztof Wilczyński <kw@...ux.com>
Signed-off-by: Amey Narkhede <ameynarkhede03@...il.com>
---
drivers/crypto/cavium/nitrox/nitrox_main.c | 2 +-
.../ethernet/cavium/liquidio/lio_vf_main.c | 2 +-
drivers/pci/hotplug/pciehp.h | 2 +-
drivers/pci/hotplug/pciehp_hpc.c | 2 +-
drivers/pci/hotplug/pnv_php.c | 4 +-
drivers/pci/pci-acpi.c | 5 +-
drivers/pci/pci.c | 52 +++++++++----------
drivers/pci/pci.h | 12 ++---
drivers/pci/pcie/aer.c | 2 +-
drivers/pci/quirks.c | 20 +++----
include/linux/pci.h | 5 +-
include/linux/pci_hotplug.h | 2 +-
12 files changed, 57 insertions(+), 53 deletions(-)
diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c b/drivers/crypto/cavium/nitrox/nitrox_main.c
index 15d6c8452807..f97fa8e997b5 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_main.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
@@ -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);
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 336d149ee2e2..6e666be6907a 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -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);
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 4fd200d8b0a9..23d6d6813edf 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -181,7 +181,7 @@ 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);
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index fb3840e222ad..d9f782b2e203 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -834,7 +834,7 @@ 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);
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 04565162a449..4c17a5dc26cf 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -526,7 +526,7 @@ static int pnv_php_enable(struct pnv_php_slot *php_slot, bool rescan)
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;
@@ -537,7 +537,7 @@ static int pnv_php_reset_slot(struct hotplug_slot *slot, int probe)
* which don't have a bridge. Only claim to support
* reset_slot() if we have a bridge device (for now...)
*/
- if (probe)
+ if (probe == PCI_RESET_PROBE)
return !bridge;
/* mask our interrupt while resetting the bridge */
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 31f76746741f..7492717c204e 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -944,9 +944,10 @@ 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 PCI_RESET_PROBE, check whether _RST method is included
+ * in the acpi_device context.
*/
-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);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 5f76d04fa864..08e57ece43f8 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4663,11 +4663,11 @@ 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 PCI_RESET_PROBE, only check if the 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 (!pcie_has_flr(dev))
return -ENOTTY;
@@ -4679,7 +4679,7 @@ 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;
@@ -4726,7 +4726,7 @@ 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 PCI_RESET_PROBE, only check 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
@@ -4738,7 +4738,7 @@ 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;
@@ -4749,7 +4749,7 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
if (csr & PCI_PM_CTRL_NO_SOFT_RESET)
return -ENOTTY;
- if (probe)
+ if (probe == PCI_RESET_PROBE)
return 0;
if (dev->current_state != PCI_D0)
@@ -4998,7 +4998,7 @@ 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;
@@ -5016,7 +5016,7 @@ 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;
@@ -5031,7 +5031,7 @@ 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)
@@ -5040,7 +5040,7 @@ 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;
@@ -5203,7 +5203,7 @@ static ssize_t reset_method_store(struct device *dev,
if (i < n)
continue;
- if (pci_reset_fn_methods[m].reset_fn(pdev, 1)) {
+ if (pci_reset_fn_methods[m].reset_fn(pdev, PCI_RESET_PROBE)) {
pci_warn(pdev, "Unsupported reset method '%s'", name);
continue;
}
@@ -5222,7 +5222,7 @@ static ssize_t reset_method_store(struct device *dev,
if (pdev->reset_methods[0] == 0) {
pci_warn(pdev, "All device reset methods disabled by user");
} else if ((pdev->reset_methods[0] != 1) &&
- !pci_reset_fn_methods[1].reset_fn(pdev, 1)) {
+ !pci_reset_fn_methods[1].reset_fn(pdev, PCI_RESET_PROBE)) {
pci_warn(pdev, "Device specific reset disabled/de-prioritized by user");
}
return count;
@@ -5289,7 +5289,7 @@ 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)
@@ -5323,7 +5323,7 @@ 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)
@@ -5640,21 +5640,21 @@ 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;
if (!slot || !pci_slot_resetable(slot))
return -ENOTTY;
- if (!probe)
+ if (probe != PCI_RESET_PROBE)
pci_slot_lock(slot);
might_sleep();
rc = pci_reset_hotplug_slot(slot->hotplug, probe);
- if (!probe)
+ if (probe != PCI_RESET_PROBE)
pci_slot_unlock(slot);
return rc;
@@ -5668,7 +5668,7 @@ 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);
@@ -5691,14 +5691,14 @@ 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
@@ -5707,14 +5707,14 @@ 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;
if (!bus->self || !pci_bus_resetable(bus))
return -ENOTTY;
- if (probe)
+ if (probe == PCI_RESET_PROBE)
return 0;
pci_bus_lock(bus);
@@ -5753,14 +5753,14 @@ 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);
}
/**
@@ -5771,7 +5771,7 @@ int pci_bus_error_reset(struct pci_dev *bridge)
*/
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);
@@ -5785,7 +5785,7 @@ 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;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index b13dae3323da..45c93d78f64a 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -604,18 +604,18 @@ 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;
}
@@ -704,9 +704,9 @@ 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;
}
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 98077595a73e..cfa7a177500b 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1405,7 +1405,7 @@ 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
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 0db5dac3ddce..50c3078bf444 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3669,7 +3669,7 @@ 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
@@ -3691,7 +3691,7 @@ 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;
@@ -3734,7 +3734,7 @@ static int reset_ivb_igd(struct pci_dev *dev, int probe)
}
/* 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;
@@ -3812,14 +3812,14 @@ 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)
@@ -3886,12 +3886,12 @@ 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);
@@ -3906,7 +3906,7 @@ 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;
@@ -3983,7 +3983,7 @@ 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;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index d3b06bfd8b99..5a9e906b0abf 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -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
@@ -1232,7 +1235,7 @@ 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);
diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
index b482e42d7153..608c012eb8ac 100644
--- a/include/linux/pci_hotplug.h
+++ b/include/linux/pci_hotplug.h
@@ -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);
};
/**
--
2.32.0
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