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path: root/drivers/pci/hotplug
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-rw-r--r--drivers/pci/hotplug/Kconfig12
-rw-r--r--drivers/pci/hotplug/Makefile1
-rw-r--r--drivers/pci/hotplug/TODO4
-rw-r--r--drivers/pci/hotplug/acpiphp_ampere_altra.c2
-rw-r--r--drivers/pci/hotplug/acpiphp_ibm.c4
-rw-r--r--drivers/pci/hotplug/cpci_hotplug.h3
-rw-r--r--drivers/pci/hotplug/cpci_hotplug_core.c17
-rw-r--r--drivers/pci/hotplug/cpqphp_ctrl.c4
-rw-r--r--drivers/pci/hotplug/cpqphp_pci.c55
-rw-r--r--drivers/pci/hotplug/cpqphp_sysfs.c1
-rw-r--r--drivers/pci/hotplug/ibmphp_hpc.c6
-rw-r--r--drivers/pci/hotplug/octep_hp.c427
-rw-r--r--drivers/pci/hotplug/pci_hotplug_core.c223
-rw-r--r--drivers/pci/hotplug/pciehp.h1
-rw-r--r--drivers/pci/hotplug/pciehp_core.c26
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c5
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c91
-rw-r--r--drivers/pci/hotplug/pnv_php.c248
-rw-r--r--drivers/pci/hotplug/s390_pci_hpc.c6
-rw-r--r--drivers/pci/hotplug/shpchp.h18
-rw-r--r--drivers/pci/hotplug/shpchp_core.c13
-rw-r--r--drivers/pci/hotplug/shpchp_hpc.c6
22 files changed, 880 insertions, 293 deletions
diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index 1472aef0fb81..3207860b52e4 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -97,7 +97,7 @@ config HOTPLUG_PCI_CPCI_ZT5550
tristate "Ziatech ZT5550 CompactPCI Hotplug driver"
depends on HOTPLUG_PCI_CPCI && X86
help
- Say Y here if you have an Performance Technologies (formerly Intel,
+ Say Y here if you have a Performance Technologies (formerly Intel,
formerly just Ziatech) Ziatech ZT5550 CompactPCI system card.
To compile this driver as a module, choose M here: the
@@ -118,6 +118,16 @@ config HOTPLUG_PCI_CPCI_GENERIC
When in doubt, say N.
+config HOTPLUG_PCI_OCTEONEP
+ bool "Marvell OCTEON PCI Hotplug driver"
+ depends on HOTPLUG_PCI
+ help
+ Say Y here if you have an OCTEON PCIe device with a hotplug
+ controller. This driver enables the non-controller functions of the
+ device to be registered as hotplug slots.
+
+ When in doubt, say N.
+
config HOTPLUG_PCI_SHPC
bool "SHPC PCI Hotplug driver"
help
diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index 240c99517d5e..40aaf31fe338 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_HOTPLUG_PCI_RPA) += rpaphp.o
obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR) += rpadlpar_io.o
obj-$(CONFIG_HOTPLUG_PCI_ACPI) += acpiphp.o
obj-$(CONFIG_HOTPLUG_PCI_S390) += s390_pci_hpc.o
+obj-$(CONFIG_HOTPLUG_PCI_OCTEONEP) += octep_hp.o
# acpiphp_ibm extends acpiphp, so should be linked afterwards.
diff --git a/drivers/pci/hotplug/TODO b/drivers/pci/hotplug/TODO
index 92e6e20e8595..7397374af171 100644
--- a/drivers/pci/hotplug/TODO
+++ b/drivers/pci/hotplug/TODO
@@ -2,10 +2,6 @@ Contributions are solicited in particular to remedy the following issues:
cpcihp:
-* There are no implementations of the ->hardware_test, ->get_power and
- ->set_power callbacks in struct cpci_hp_controller_ops. Why were they
- introduced? Can they be removed from the struct?
-
* Returned code from pci_hp_add_bridge() is not checked.
cpqphp:
diff --git a/drivers/pci/hotplug/acpiphp_ampere_altra.c b/drivers/pci/hotplug/acpiphp_ampere_altra.c
index f5c9e741c1d4..70dbc0431fc6 100644
--- a/drivers/pci/hotplug/acpiphp_ampere_altra.c
+++ b/drivers/pci/hotplug/acpiphp_ampere_altra.c
@@ -119,7 +119,7 @@ static struct platform_driver altra_led_driver = {
.acpi_match_table = altra_led_ids,
},
.probe = altra_led_probe,
- .remove_new = altra_led_remove,
+ .remove = altra_led_remove,
};
module_platform_driver(altra_led_driver);
diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 8f3a0a33f362..18e01cd55a8e 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -84,7 +84,7 @@ static int ibm_get_attention_status(struct hotplug_slot *slot, u8 *status);
static void ibm_handle_events(acpi_handle handle, u32 event, void *context);
static int ibm_get_table_from_acpi(char **bufp);
static ssize_t ibm_read_apci_table(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
+ const struct bin_attribute *bin_attr,
char *buffer, loff_t pos, size_t size);
static acpi_status __init ibm_find_acpi_device(acpi_handle handle,
u32 lvl, void *context, void **rv);
@@ -353,7 +353,7 @@ read_table_done:
* our solution is to only allow reading the table in all at once.
*/
static ssize_t ibm_read_apci_table(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
+ const struct bin_attribute *bin_attr,
char *buffer, loff_t pos, size_t size)
{
int bytes_read = -EINVAL;
diff --git a/drivers/pci/hotplug/cpci_hotplug.h b/drivers/pci/hotplug/cpci_hotplug.h
index 6d8970d8c3f2..a31d6b62f523 100644
--- a/drivers/pci/hotplug/cpci_hotplug.h
+++ b/drivers/pci/hotplug/cpci_hotplug.h
@@ -44,9 +44,6 @@ struct cpci_hp_controller_ops {
int (*enable_irq)(void);
int (*disable_irq)(void);
int (*check_irq)(void *dev_id);
- int (*hardware_test)(struct slot *slot, u32 value);
- u8 (*get_power)(struct slot *slot);
- int (*set_power)(struct slot *slot, int value);
};
struct cpci_hp_controller {
diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index d0559d2faf50..dd93e53ea7c2 100644
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -71,13 +71,10 @@ static int
enable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = to_slot(hotplug_slot);
- int retval = 0;
dbg("%s - physical_slot = %s", __func__, slot_name(slot));
- if (controller->ops->set_power)
- retval = controller->ops->set_power(slot, 1);
- return retval;
+ return 0;
}
static int
@@ -109,12 +106,6 @@ disable_slot(struct hotplug_slot *hotplug_slot)
}
cpci_led_on(slot);
- if (controller->ops->set_power) {
- retval = controller->ops->set_power(slot, 0);
- if (retval)
- goto disable_error;
- }
-
slot->adapter_status = 0;
if (slot->extracting) {
@@ -129,11 +120,7 @@ disable_error:
static u8
cpci_get_power_status(struct slot *slot)
{
- u8 power = 1;
-
- if (controller->ops->get_power)
- power = controller->ops->get_power(slot);
- return power;
+ return 1;
}
static int
diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
index c01968ef0bd7..760a5dec0431 100644
--- a/drivers/pci/hotplug/cpqphp_ctrl.c
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -1794,7 +1794,7 @@ static void interrupt_event_handler(struct controller *ctrl)
} else if (ctrl->event_queue[loop].event_type ==
INT_BUTTON_CANCEL) {
dbg("button cancel\n");
- del_timer(&p_slot->task_event);
+ timer_delete(&p_slot->task_event);
mutex_lock(&ctrl->crit_sect);
@@ -1883,7 +1883,7 @@ void cpqhp_pushbutton_thread(struct timer_list *t)
{
u8 hp_slot;
struct pci_func *func;
- struct slot *p_slot = from_timer(p_slot, t, task_event);
+ struct slot *p_slot = timer_container_of(p_slot, t, task_event);
struct controller *ctrl = (struct controller *) p_slot->ctrl;
pushbutton_pending = NULL;
diff --git a/drivers/pci/hotplug/cpqphp_pci.c b/drivers/pci/hotplug/cpqphp_pci.c
index 718bc6cf12cb..88929360fe77 100644
--- a/drivers/pci/hotplug/cpqphp_pci.c
+++ b/drivers/pci/hotplug/cpqphp_pci.c
@@ -12,8 +12,11 @@
*
*/
+#define pr_fmt(fmt) "cpqphp: " fmt
+
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/printk.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
@@ -132,18 +135,6 @@ int cpqhp_unconfigure_device(struct pci_func *func)
return 0;
}
-static int PCI_RefinedAccessConfig(struct pci_bus *bus, unsigned int devfn, u8 offset, u32 *value)
-{
- u32 vendID = 0;
-
- if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &vendID) == -1)
- return -1;
- if (PCI_POSSIBLE_ERROR(vendID))
- return -1;
- return pci_bus_read_config_dword(bus, devfn, offset, value);
-}
-
-
/*
* cpqhp_set_irq
*
@@ -202,13 +193,16 @@ static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 *dev_
{
u16 tdevice;
u32 work;
- u8 tbus;
+ int ret = -1;
ctrl->pci_bus->number = bus_num;
for (tdevice = 0; tdevice < 0xFF; tdevice++) {
/* Scan for access first */
- if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
+ if (!pci_bus_read_dev_vendor_id(ctrl->pci_bus, tdevice, &work, 0))
+ continue;
+ ret = pci_bus_read_config_dword(ctrl->pci_bus, tdevice, PCI_CLASS_REVISION, &work);
+ if (ret)
continue;
dbg("Looking for nonbridge bus_num %d dev_num %d\n", bus_num, tdevice);
/* Yep we got one. Not a bridge ? */
@@ -216,23 +210,20 @@ static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 *dev_
*dev_num = tdevice;
dbg("found it !\n");
return 0;
- }
- }
- for (tdevice = 0; tdevice < 0xFF; tdevice++) {
- /* Scan for access first */
- if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
- continue;
- dbg("Looking for bridge bus_num %d dev_num %d\n", bus_num, tdevice);
- /* Yep we got one. bridge ? */
- if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
- pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(tdevice, 0), PCI_SECONDARY_BUS, &tbus);
- /* XXX: no recursion, wtf? */
- dbg("Recurse on bus_num %d tdevice %d\n", tbus, tdevice);
- return 0;
+ } else {
+ /*
+ * XXX: Code whose debug printout indicated
+ * recursion to buses underneath bridges might be
+ * necessary was removed because it never did
+ * any recursion.
+ */
+ ret = 0;
+ pr_warn("missing feature: bridge scan recursion not implemented\n");
}
}
- return -1;
+
+ return ret;
}
@@ -1311,7 +1302,7 @@ int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_st
dbg("found io_node(base, length) = %x, %x\n",
io_node->base, io_node->length);
- dbg("populated slot =%d \n", populated_slot);
+ dbg("populated slot = %d\n", populated_slot);
if (!populated_slot) {
io_node->next = ctrl->io_head;
ctrl->io_head = io_node;
@@ -1334,7 +1325,7 @@ int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_st
dbg("found mem_node(base, length) = %x, %x\n",
mem_node->base, mem_node->length);
- dbg("populated slot =%d \n", populated_slot);
+ dbg("populated slot = %d\n", populated_slot);
if (!populated_slot) {
mem_node->next = ctrl->mem_head;
ctrl->mem_head = mem_node;
@@ -1358,7 +1349,7 @@ int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_st
p_mem_node->length = pre_mem_length << 16;
dbg("found p_mem_node(base, length) = %x, %x\n",
p_mem_node->base, p_mem_node->length);
- dbg("populated slot =%d \n", populated_slot);
+ dbg("populated slot = %d\n", populated_slot);
if (!populated_slot) {
p_mem_node->next = ctrl->p_mem_head;
@@ -1382,7 +1373,7 @@ int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_st
bus_node->length = max_bus - secondary_bus + 1;
dbg("found bus_node(base, length) = %x, %x\n",
bus_node->base, bus_node->length);
- dbg("populated slot =%d \n", populated_slot);
+ dbg("populated slot = %d\n", populated_slot);
if (!populated_slot) {
bus_node->next = ctrl->bus_head;
ctrl->bus_head = bus_node;
diff --git a/drivers/pci/hotplug/cpqphp_sysfs.c b/drivers/pci/hotplug/cpqphp_sysfs.c
index fed1360ee9b1..6143ebf71f21 100644
--- a/drivers/pci/hotplug/cpqphp_sysfs.c
+++ b/drivers/pci/hotplug/cpqphp_sysfs.c
@@ -123,7 +123,6 @@ static int spew_debug_info(struct controller *ctrl, char *data, int size)
struct ctrl_dbg {
int size;
char *data;
- struct controller *ctrl;
};
#define MAX_OUTPUT (4*PAGE_SIZE)
diff --git a/drivers/pci/hotplug/ibmphp_hpc.c b/drivers/pci/hotplug/ibmphp_hpc.c
index a5720d12e573..2324167656a6 100644
--- a/drivers/pci/hotplug/ibmphp_hpc.c
+++ b/drivers/pci/hotplug/ibmphp_hpc.c
@@ -124,7 +124,7 @@ static u8 i2c_ctrl_read(struct controller *ctlr_ptr, void __iomem *WPGBbar, u8 i
unsigned long ultemp;
unsigned long data; // actual data HILO format
- debug_polling("%s - Entry WPGBbar[%p] index[%x] \n", __func__, WPGBbar, index);
+ debug_polling("%s - Entry WPGBbar[%p] index[%x]\n", __func__, WPGBbar, index);
//--------------------------------------------------------------------
// READ - step 1
@@ -147,7 +147,7 @@ static u8 i2c_ctrl_read(struct controller *ctlr_ptr, void __iomem *WPGBbar, u8 i
ultemp = ultemp << 8;
data |= ultemp;
} else {
- err("this controller type is not supported \n");
+ err("this controller type is not supported\n");
return HPC_ERROR;
}
@@ -258,7 +258,7 @@ static u8 i2c_ctrl_write(struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
ultemp = ultemp << 8;
data |= ultemp;
} else {
- err("this controller type is not supported \n");
+ err("this controller type is not supported\n");
return HPC_ERROR;
}
diff --git a/drivers/pci/hotplug/octep_hp.c b/drivers/pci/hotplug/octep_hp.c
new file mode 100644
index 000000000000..2bce7296c050
--- /dev/null
+++ b/drivers/pci/hotplug/octep_hp.c
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2024 Marvell. */
+
+#include <linux/cleanup.h>
+#include <linux/container_of.h>
+#include <linux/delay.h>
+#include <linux/dev_printk.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+#define OCTEP_HP_INTR_OFFSET(x) (0x20400 + ((x) << 4))
+#define OCTEP_HP_INTR_VECTOR(x) (16 + (x))
+#define OCTEP_HP_DRV_NAME "octep_hp"
+
+/*
+ * Type of MSI-X interrupts. OCTEP_HP_INTR_VECTOR() and
+ * OCTEP_HP_INTR_OFFSET() generate the vector and offset for an interrupt
+ * type.
+ */
+enum octep_hp_intr_type {
+ OCTEP_HP_INTR_INVALID = -1,
+ OCTEP_HP_INTR_ENA = 0,
+ OCTEP_HP_INTR_DIS = 1,
+ OCTEP_HP_INTR_MAX = 2,
+};
+
+struct octep_hp_cmd {
+ struct list_head list;
+ enum octep_hp_intr_type intr_type;
+ u64 intr_val;
+};
+
+struct octep_hp_slot {
+ struct list_head list;
+ struct hotplug_slot slot;
+ u16 slot_number;
+ struct pci_dev *hp_pdev;
+ unsigned int hp_devfn;
+ struct octep_hp_controller *ctrl;
+};
+
+struct octep_hp_intr_info {
+ enum octep_hp_intr_type type;
+ int number;
+ char name[16];
+};
+
+struct octep_hp_controller {
+ void __iomem *base;
+ struct pci_dev *pdev;
+ struct octep_hp_intr_info intr[OCTEP_HP_INTR_MAX];
+ struct work_struct work;
+ struct list_head slot_list;
+ struct mutex slot_lock; /* Protects slot_list */
+ struct list_head hp_cmd_list;
+ spinlock_t hp_cmd_lock; /* Protects hp_cmd_list */
+};
+
+static void octep_hp_enable_pdev(struct octep_hp_controller *hp_ctrl,
+ struct octep_hp_slot *hp_slot)
+{
+ guard(mutex)(&hp_ctrl->slot_lock);
+ if (hp_slot->hp_pdev) {
+ pci_dbg(hp_slot->hp_pdev, "Slot %s is already enabled\n",
+ hotplug_slot_name(&hp_slot->slot));
+ return;
+ }
+
+ /* Scan the device and add it to the bus */
+ hp_slot->hp_pdev = pci_scan_single_device(hp_ctrl->pdev->bus,
+ hp_slot->hp_devfn);
+ pci_bus_assign_resources(hp_ctrl->pdev->bus);
+ pci_bus_add_device(hp_slot->hp_pdev);
+
+ dev_dbg(&hp_slot->hp_pdev->dev, "Enabled slot %s\n",
+ hotplug_slot_name(&hp_slot->slot));
+}
+
+static void octep_hp_disable_pdev(struct octep_hp_controller *hp_ctrl,
+ struct octep_hp_slot *hp_slot)
+{
+ guard(mutex)(&hp_ctrl->slot_lock);
+ if (!hp_slot->hp_pdev) {
+ pci_dbg(hp_ctrl->pdev, "Slot %s is already disabled\n",
+ hotplug_slot_name(&hp_slot->slot));
+ return;
+ }
+
+ pci_dbg(hp_slot->hp_pdev, "Disabling slot %s\n",
+ hotplug_slot_name(&hp_slot->slot));
+
+ /* Remove the device from the bus */
+ pci_stop_and_remove_bus_device_locked(hp_slot->hp_pdev);
+ hp_slot->hp_pdev = NULL;
+}
+
+static int octep_hp_enable_slot(struct hotplug_slot *slot)
+{
+ struct octep_hp_slot *hp_slot =
+ container_of(slot, struct octep_hp_slot, slot);
+
+ octep_hp_enable_pdev(hp_slot->ctrl, hp_slot);
+ return 0;
+}
+
+static int octep_hp_disable_slot(struct hotplug_slot *slot)
+{
+ struct octep_hp_slot *hp_slot =
+ container_of(slot, struct octep_hp_slot, slot);
+
+ octep_hp_disable_pdev(hp_slot->ctrl, hp_slot);
+ return 0;
+}
+
+static struct hotplug_slot_ops octep_hp_slot_ops = {
+ .enable_slot = octep_hp_enable_slot,
+ .disable_slot = octep_hp_disable_slot,
+};
+
+#define SLOT_NAME_SIZE 16
+static struct octep_hp_slot *
+octep_hp_register_slot(struct octep_hp_controller *hp_ctrl,
+ struct pci_dev *pdev, u16 slot_number)
+{
+ char slot_name[SLOT_NAME_SIZE];
+ struct octep_hp_slot *hp_slot;
+ int ret;
+
+ hp_slot = kzalloc(sizeof(*hp_slot), GFP_KERNEL);
+ if (!hp_slot)
+ return ERR_PTR(-ENOMEM);
+
+ hp_slot->ctrl = hp_ctrl;
+ hp_slot->hp_pdev = pdev;
+ hp_slot->hp_devfn = pdev->devfn;
+ hp_slot->slot_number = slot_number;
+ hp_slot->slot.ops = &octep_hp_slot_ops;
+
+ snprintf(slot_name, sizeof(slot_name), "octep_hp_%u", slot_number);
+ ret = pci_hp_register(&hp_slot->slot, hp_ctrl->pdev->bus,
+ PCI_SLOT(pdev->devfn), slot_name);
+ if (ret) {
+ kfree(hp_slot);
+ return ERR_PTR(ret);
+ }
+
+ pci_info(pdev, "Registered slot %s for device %s\n",
+ slot_name, pci_name(pdev));
+
+ list_add_tail(&hp_slot->list, &hp_ctrl->slot_list);
+ octep_hp_disable_pdev(hp_ctrl, hp_slot);
+
+ return hp_slot;
+}
+
+static void octep_hp_deregister_slot(void *data)
+{
+ struct octep_hp_slot *hp_slot = data;
+ struct octep_hp_controller *hp_ctrl = hp_slot->ctrl;
+
+ pci_hp_deregister(&hp_slot->slot);
+ octep_hp_enable_pdev(hp_ctrl, hp_slot);
+ list_del(&hp_slot->list);
+ kfree(hp_slot);
+}
+
+static const char *octep_hp_cmd_name(enum octep_hp_intr_type type)
+{
+ switch (type) {
+ case OCTEP_HP_INTR_ENA:
+ return "hotplug enable";
+ case OCTEP_HP_INTR_DIS:
+ return "hotplug disable";
+ default:
+ return "invalid";
+ }
+}
+
+static void octep_hp_cmd_handler(struct octep_hp_controller *hp_ctrl,
+ struct octep_hp_cmd *hp_cmd)
+{
+ struct octep_hp_slot *hp_slot;
+
+ /*
+ * Enable or disable the slots based on the slot mask.
+ * intr_val is a bit mask where each bit represents a slot.
+ */
+ list_for_each_entry(hp_slot, &hp_ctrl->slot_list, list) {
+ if (!(hp_cmd->intr_val & BIT(hp_slot->slot_number)))
+ continue;
+
+ pci_info(hp_ctrl->pdev, "Received %s command for slot %s\n",
+ octep_hp_cmd_name(hp_cmd->intr_type),
+ hotplug_slot_name(&hp_slot->slot));
+
+ switch (hp_cmd->intr_type) {
+ case OCTEP_HP_INTR_ENA:
+ octep_hp_enable_pdev(hp_ctrl, hp_slot);
+ break;
+ case OCTEP_HP_INTR_DIS:
+ octep_hp_disable_pdev(hp_ctrl, hp_slot);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void octep_hp_work_handler(struct work_struct *work)
+{
+ struct octep_hp_controller *hp_ctrl;
+ struct octep_hp_cmd *hp_cmd;
+ unsigned long flags;
+
+ hp_ctrl = container_of(work, struct octep_hp_controller, work);
+
+ /* Process all the hotplug commands */
+ spin_lock_irqsave(&hp_ctrl->hp_cmd_lock, flags);
+ while (!list_empty(&hp_ctrl->hp_cmd_list)) {
+ hp_cmd = list_first_entry(&hp_ctrl->hp_cmd_list,
+ struct octep_hp_cmd, list);
+ list_del(&hp_cmd->list);
+ spin_unlock_irqrestore(&hp_ctrl->hp_cmd_lock, flags);
+
+ octep_hp_cmd_handler(hp_ctrl, hp_cmd);
+ kfree(hp_cmd);
+
+ spin_lock_irqsave(&hp_ctrl->hp_cmd_lock, flags);
+ }
+ spin_unlock_irqrestore(&hp_ctrl->hp_cmd_lock, flags);
+}
+
+static enum octep_hp_intr_type octep_hp_intr_type(struct octep_hp_intr_info *intr,
+ int irq)
+{
+ enum octep_hp_intr_type type;
+
+ for (type = OCTEP_HP_INTR_ENA; type < OCTEP_HP_INTR_MAX; type++) {
+ if (intr[type].number == irq)
+ return type;
+ }
+
+ return OCTEP_HP_INTR_INVALID;
+}
+
+static irqreturn_t octep_hp_intr_handler(int irq, void *data)
+{
+ struct octep_hp_controller *hp_ctrl = data;
+ struct pci_dev *pdev = hp_ctrl->pdev;
+ enum octep_hp_intr_type type;
+ struct octep_hp_cmd *hp_cmd;
+ u64 intr_val;
+
+ type = octep_hp_intr_type(hp_ctrl->intr, irq);
+ if (type == OCTEP_HP_INTR_INVALID) {
+ pci_err(pdev, "Invalid interrupt %d\n", irq);
+ return IRQ_HANDLED;
+ }
+
+ /* Read and clear the interrupt */
+ intr_val = readq(hp_ctrl->base + OCTEP_HP_INTR_OFFSET(type));
+ writeq(intr_val, hp_ctrl->base + OCTEP_HP_INTR_OFFSET(type));
+
+ hp_cmd = kzalloc(sizeof(*hp_cmd), GFP_ATOMIC);
+ if (!hp_cmd)
+ return IRQ_HANDLED;
+
+ hp_cmd->intr_val = intr_val;
+ hp_cmd->intr_type = type;
+
+ /* Add the command to the list and schedule the work */
+ spin_lock(&hp_ctrl->hp_cmd_lock);
+ list_add_tail(&hp_cmd->list, &hp_ctrl->hp_cmd_list);
+ spin_unlock(&hp_ctrl->hp_cmd_lock);
+ schedule_work(&hp_ctrl->work);
+
+ return IRQ_HANDLED;
+}
+
+static void octep_hp_irq_cleanup(void *data)
+{
+ struct octep_hp_controller *hp_ctrl = data;
+
+ pci_free_irq_vectors(hp_ctrl->pdev);
+ flush_work(&hp_ctrl->work);
+}
+
+static int octep_hp_request_irq(struct octep_hp_controller *hp_ctrl,
+ enum octep_hp_intr_type type)
+{
+ struct pci_dev *pdev = hp_ctrl->pdev;
+ struct octep_hp_intr_info *intr;
+ int irq;
+
+ irq = pci_irq_vector(pdev, OCTEP_HP_INTR_VECTOR(type));
+ if (irq < 0)
+ return irq;
+
+ intr = &hp_ctrl->intr[type];
+ intr->number = irq;
+ intr->type = type;
+ snprintf(intr->name, sizeof(intr->name), "octep_hp_%d", type);
+
+ return devm_request_irq(&pdev->dev, irq, octep_hp_intr_handler,
+ IRQF_SHARED, intr->name, hp_ctrl);
+}
+
+static int octep_hp_controller_setup(struct pci_dev *pdev,
+ struct octep_hp_controller *hp_ctrl)
+{
+ struct device *dev = &pdev->dev;
+ enum octep_hp_intr_type type;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to enable PCI device\n");
+
+ hp_ctrl->base = pcim_iomap_region(pdev, 0, OCTEP_HP_DRV_NAME);
+ if (IS_ERR(hp_ctrl->base))
+ return dev_err_probe(dev, PTR_ERR(hp_ctrl->base),
+ "Failed to map PCI device region\n");
+
+ pci_set_master(pdev);
+ pci_set_drvdata(pdev, hp_ctrl);
+
+ INIT_LIST_HEAD(&hp_ctrl->slot_list);
+ INIT_LIST_HEAD(&hp_ctrl->hp_cmd_list);
+ mutex_init(&hp_ctrl->slot_lock);
+ spin_lock_init(&hp_ctrl->hp_cmd_lock);
+ INIT_WORK(&hp_ctrl->work, octep_hp_work_handler);
+ hp_ctrl->pdev = pdev;
+
+ ret = pci_alloc_irq_vectors(pdev, 1,
+ OCTEP_HP_INTR_VECTOR(OCTEP_HP_INTR_MAX),
+ PCI_IRQ_MSIX);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to alloc MSI-X vectors\n");
+
+ ret = devm_add_action(&pdev->dev, octep_hp_irq_cleanup, hp_ctrl);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "Failed to add IRQ cleanup action\n");
+
+ for (type = OCTEP_HP_INTR_ENA; type < OCTEP_HP_INTR_MAX; type++) {
+ ret = octep_hp_request_irq(hp_ctrl, type);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to request IRQ for vector %d\n",
+ OCTEP_HP_INTR_VECTOR(type));
+ }
+
+ return 0;
+}
+
+static int octep_hp_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct octep_hp_controller *hp_ctrl;
+ struct pci_dev *tmp_pdev, *next;
+ struct octep_hp_slot *hp_slot;
+ u16 slot_number = 0;
+ int ret;
+
+ hp_ctrl = devm_kzalloc(&pdev->dev, sizeof(*hp_ctrl), GFP_KERNEL);
+ if (!hp_ctrl)
+ return -ENOMEM;
+
+ ret = octep_hp_controller_setup(pdev, hp_ctrl);
+ if (ret)
+ return ret;
+
+ /*
+ * Register all hotplug slots. Hotplug controller is the first function
+ * of the PCI device. The hotplug slots are the remaining functions of
+ * the PCI device. The hotplug slot functions are logically removed from
+ * the bus during probing and are re-enabled by the driver when a
+ * hotplug event is received.
+ */
+ list_for_each_entry_safe(tmp_pdev, next, &pdev->bus->devices, bus_list) {
+ if (tmp_pdev == pdev)
+ continue;
+
+ hp_slot = octep_hp_register_slot(hp_ctrl, tmp_pdev, slot_number);
+ if (IS_ERR(hp_slot))
+ return dev_err_probe(&pdev->dev, PTR_ERR(hp_slot),
+ "Failed to register hotplug slot %u\n",
+ slot_number);
+
+ ret = devm_add_action(&pdev->dev, octep_hp_deregister_slot,
+ hp_slot);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to add action for deregistering slot %u\n",
+ slot_number);
+ slot_number++;
+ }
+
+ return 0;
+}
+
+#define PCI_DEVICE_ID_CAVIUM_OCTEP_HP_CTLR 0xa0e3
+static struct pci_device_id octep_hp_pci_map[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_CAVIUM_OCTEP_HP_CTLR) },
+ { },
+};
+
+static struct pci_driver octep_hp = {
+ .name = OCTEP_HP_DRV_NAME,
+ .id_table = octep_hp_pci_map,
+ .probe = octep_hp_pci_probe,
+};
+
+module_pci_driver(octep_hp);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marvell");
+MODULE_DESCRIPTION("Marvell OCTEON PCI Hotplug driver");
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 058d5937d8a9..fadcf98a8a66 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -14,21 +14,15 @@
* Scott Murray <scottm@somanetworks.com>
*/
-#include <linux/module.h> /* try_module_get & module_put */
+#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
-#include <linux/list.h>
#include <linux/kobject.h>
#include <linux/sysfs.h>
-#include <linux/pagemap.h>
#include <linux/init.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
-#include <linux/uaccess.h>
#include "../pci.h"
#include "cpci_hotplug.h"
@@ -42,20 +36,14 @@
/* local variables */
static bool debug;
-static LIST_HEAD(pci_hotplug_slot_list);
-static DEFINE_MUTEX(pci_hp_mutex);
-
/* Weee, fun with macros... */
#define GET_STATUS(name, type) \
static int get_##name(struct hotplug_slot *slot, type *value) \
{ \
const struct hotplug_slot_ops *ops = slot->ops; \
int retval = 0; \
- if (!try_module_get(slot->owner)) \
- return -ENODEV; \
if (ops->get_##name) \
retval = ops->get_##name(slot, value); \
- module_put(slot->owner); \
return retval; \
}
@@ -88,10 +76,6 @@ static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
power = (u8)(lpower & 0xff);
dbg("power = %d\n", power);
- if (!try_module_get(slot->owner)) {
- retval = -ENODEV;
- goto exit;
- }
switch (power) {
case 0:
if (slot->ops->disable_slot)
@@ -107,9 +91,7 @@ static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
err("Illegal value specified for power\n");
retval = -EINVAL;
}
- module_put(slot->owner);
-exit:
if (retval)
return retval;
return count;
@@ -146,15 +128,9 @@ static ssize_t attention_write_file(struct pci_slot *pci_slot, const char *buf,
attention = (u8)(lattention & 0xff);
dbg(" - attention = %d\n", attention);
- if (!try_module_get(slot->owner)) {
- retval = -ENODEV;
- goto exit;
- }
if (ops->set_attention_status)
retval = ops->set_attention_status(slot, attention);
- module_put(slot->owner);
-exit:
if (retval)
return retval;
return count;
@@ -212,15 +188,9 @@ static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf,
test = (u32)(ltest & 0xffffffff);
dbg("test = %d\n", test);
- if (!try_module_get(slot->owner)) {
- retval = -ENODEV;
- goto exit;
- }
if (slot->ops->hardware_test)
retval = slot->ops->hardware_test(slot, test);
- module_put(slot->owner);
-exit:
if (retval)
return retval;
return count;
@@ -231,12 +201,8 @@ static struct pci_slot_attribute hotplug_slot_attr_test = {
.store = test_write_file
};
-static bool has_power_file(struct pci_slot *pci_slot)
+static bool has_power_file(struct hotplug_slot *slot)
{
- struct hotplug_slot *slot = pci_slot->hotplug;
-
- if ((!slot) || (!slot->ops))
- return false;
if ((slot->ops->enable_slot) ||
(slot->ops->disable_slot) ||
(slot->ops->get_power_status))
@@ -244,87 +210,79 @@ static bool has_power_file(struct pci_slot *pci_slot)
return false;
}
-static bool has_attention_file(struct pci_slot *pci_slot)
+static bool has_attention_file(struct hotplug_slot *slot)
{
- struct hotplug_slot *slot = pci_slot->hotplug;
-
- if ((!slot) || (!slot->ops))
- return false;
if ((slot->ops->set_attention_status) ||
(slot->ops->get_attention_status))
return true;
return false;
}
-static bool has_latch_file(struct pci_slot *pci_slot)
+static bool has_latch_file(struct hotplug_slot *slot)
{
- struct hotplug_slot *slot = pci_slot->hotplug;
-
- if ((!slot) || (!slot->ops))
- return false;
if (slot->ops->get_latch_status)
return true;
return false;
}
-static bool has_adapter_file(struct pci_slot *pci_slot)
+static bool has_adapter_file(struct hotplug_slot *slot)
{
- struct hotplug_slot *slot = pci_slot->hotplug;
-
- if ((!slot) || (!slot->ops))
- return false;
if (slot->ops->get_adapter_status)
return true;
return false;
}
-static bool has_test_file(struct pci_slot *pci_slot)
+static bool has_test_file(struct hotplug_slot *slot)
{
- struct hotplug_slot *slot = pci_slot->hotplug;
-
- if ((!slot) || (!slot->ops))
- return false;
if (slot->ops->hardware_test)
return true;
return false;
}
-static int fs_add_slot(struct pci_slot *pci_slot)
+static int fs_add_slot(struct hotplug_slot *slot, struct pci_slot *pci_slot)
{
+ struct kobject *kobj;
int retval = 0;
/* Create symbolic link to the hotplug driver module */
- pci_hp_create_module_link(pci_slot);
+ kobj = kset_find_obj(module_kset, slot->mod_name);
+ if (kobj) {
+ retval = sysfs_create_link(&pci_slot->kobj, kobj, "module");
+ if (retval)
+ dev_err(&pci_slot->bus->dev,
+ "Error creating sysfs link (%d)\n", retval);
+ kobject_put(kobj);
+ }
- if (has_power_file(pci_slot)) {
+ if (has_power_file(slot)) {
retval = sysfs_create_file(&pci_slot->kobj,
&hotplug_slot_attr_power.attr);
if (retval)
goto exit_power;
}
- if (has_attention_file(pci_slot)) {
+ if (has_attention_file(slot)) {
retval = sysfs_create_file(&pci_slot->kobj,
&hotplug_slot_attr_attention.attr);
if (retval)
goto exit_attention;
}
- if (has_latch_file(pci_slot)) {
+ if (has_latch_file(slot)) {
retval = sysfs_create_file(&pci_slot->kobj,
&hotplug_slot_attr_latch.attr);
if (retval)
goto exit_latch;
}
- if (has_adapter_file(pci_slot)) {
+ if (has_adapter_file(slot)) {
retval = sysfs_create_file(&pci_slot->kobj,
&hotplug_slot_attr_presence.attr);
if (retval)
goto exit_adapter;
}
- if (has_test_file(pci_slot)) {
+ if (has_test_file(slot)) {
retval = sysfs_create_file(&pci_slot->kobj,
&hotplug_slot_attr_test.attr);
if (retval)
@@ -334,62 +292,51 @@ static int fs_add_slot(struct pci_slot *pci_slot)
goto exit;
exit_test:
- if (has_adapter_file(pci_slot))
+ if (has_adapter_file(slot))
sysfs_remove_file(&pci_slot->kobj,
&hotplug_slot_attr_presence.attr);
exit_adapter:
- if (has_latch_file(pci_slot))
+ if (has_latch_file(slot))
sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr);
exit_latch:
- if (has_attention_file(pci_slot))
+ if (has_attention_file(slot))
sysfs_remove_file(&pci_slot->kobj,
&hotplug_slot_attr_attention.attr);
exit_attention:
- if (has_power_file(pci_slot))
+ if (has_power_file(slot))
sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr);
exit_power:
- pci_hp_remove_module_link(pci_slot);
+ sysfs_remove_link(&pci_slot->kobj, "module");
exit:
return retval;
}
-static void fs_remove_slot(struct pci_slot *pci_slot)
+static void fs_remove_slot(struct hotplug_slot *slot, struct pci_slot *pci_slot)
{
- if (has_power_file(pci_slot))
+ if (has_power_file(slot))
sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr);
- if (has_attention_file(pci_slot))
+ if (has_attention_file(slot))
sysfs_remove_file(&pci_slot->kobj,
&hotplug_slot_attr_attention.attr);
- if (has_latch_file(pci_slot))
+ if (has_latch_file(slot))
sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr);
- if (has_adapter_file(pci_slot))
+ if (has_adapter_file(slot))
sysfs_remove_file(&pci_slot->kobj,
&hotplug_slot_attr_presence.attr);
- if (has_test_file(pci_slot))
+ if (has_test_file(slot))
sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_test.attr);
- pci_hp_remove_module_link(pci_slot);
-}
-
-static struct hotplug_slot *get_slot_from_name(const char *name)
-{
- struct hotplug_slot *slot;
-
- list_for_each_entry(slot, &pci_hotplug_slot_list, slot_list) {
- if (strcmp(hotplug_slot_name(slot), name) == 0)
- return slot;
- }
- return NULL;
+ sysfs_remove_link(&pci_slot->kobj, "module");
}
/**
* __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
- * @bus: bus this slot is on
* @slot: pointer to the &struct hotplug_slot to register
+ * @bus: bus this slot is on
* @devnr: device number
* @name: name registered with kobject core
* @owner: caller module owner
@@ -476,18 +423,19 @@ EXPORT_SYMBOL_GPL(__pci_hp_initialize);
*/
int pci_hp_add(struct hotplug_slot *slot)
{
- struct pci_slot *pci_slot = slot->pci_slot;
+ struct pci_slot *pci_slot;
int result;
- result = fs_add_slot(pci_slot);
+ if (WARN_ON(!slot))
+ return -EINVAL;
+
+ pci_slot = slot->pci_slot;
+
+ result = fs_add_slot(slot, pci_slot);
if (result)
return result;
kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
- mutex_lock(&pci_hp_mutex);
- list_add(&slot->slot_list, &pci_hotplug_slot_list);
- mutex_unlock(&pci_hp_mutex);
- dbg("Added slot %s to the list\n", hotplug_slot_name(slot));
return 0;
}
EXPORT_SYMBOL_GPL(pci_hp_add);
@@ -498,8 +446,6 @@ EXPORT_SYMBOL_GPL(pci_hp_add);
*
* The @slot must have been registered with the pci hotplug subsystem
* previously with a call to pci_hp_register().
- *
- * Returns 0 if successful, anything else for an error.
*/
void pci_hp_deregister(struct hotplug_slot *slot)
{
@@ -513,27 +459,13 @@ EXPORT_SYMBOL_GPL(pci_hp_deregister);
* @slot: pointer to the &struct hotplug_slot to unpublish
*
* Remove a hotplug slot's sysfs interface.
- *
- * Returns 0 on success or a negative int on error.
*/
void pci_hp_del(struct hotplug_slot *slot)
{
- struct hotplug_slot *temp;
-
if (WARN_ON(!slot))
return;
- mutex_lock(&pci_hp_mutex);
- temp = get_slot_from_name(hotplug_slot_name(slot));
- if (WARN_ON(temp != slot)) {
- mutex_unlock(&pci_hp_mutex);
- return;
- }
-
- list_del(&slot->slot_list);
- mutex_unlock(&pci_hp_mutex);
- dbg("Removed slot %s from the list\n", hotplug_slot_name(slot));
- fs_remove_slot(slot->pci_slot);
+ fs_remove_slot(slot, slot->pci_slot);
}
EXPORT_SYMBOL_GPL(pci_hp_del);
@@ -545,8 +477,6 @@ EXPORT_SYMBOL_GPL(pci_hp_del);
* the driver may no longer invoke hotplug_slot_name() to get the slot's
* unique name. The driver no longer needs to handle a ->reset_slot callback
* from this point on.
- *
- * Returns 0 on success or a negative int on error.
*/
void pci_hp_destroy(struct hotplug_slot *slot)
{
@@ -558,6 +488,75 @@ void pci_hp_destroy(struct hotplug_slot *slot)
}
EXPORT_SYMBOL_GPL(pci_hp_destroy);
+static DECLARE_WAIT_QUEUE_HEAD(pci_hp_link_change_wq);
+
+/**
+ * pci_hp_ignore_link_change - begin code section causing spurious link changes
+ * @pdev: PCI hotplug bridge
+ *
+ * Mark the beginning of a code section causing spurious link changes on the
+ * Secondary Bus of @pdev, e.g. as a side effect of a Secondary Bus Reset,
+ * D3cold transition, firmware update or FPGA reconfiguration.
+ *
+ * Hotplug drivers can thus check whether such a code section is executing
+ * concurrently, await it with pci_hp_spurious_link_change() and ignore the
+ * resulting link change events.
+ *
+ * Must be paired with pci_hp_unignore_link_change(). May be called both
+ * from the PCI core and from Endpoint drivers. May be called for bridges
+ * which are not hotplug-capable, in which case it has no effect because
+ * no hotplug driver is bound to the bridge.
+ */
+void pci_hp_ignore_link_change(struct pci_dev *pdev)
+{
+ set_bit(PCI_LINK_CHANGING, &pdev->priv_flags);
+ smp_mb__after_atomic(); /* pairs with implied barrier of wait_event() */
+}
+
+/**
+ * pci_hp_unignore_link_change - end code section causing spurious link changes
+ * @pdev: PCI hotplug bridge
+ *
+ * Mark the end of a code section causing spurious link changes on the
+ * Secondary Bus of @pdev. Must be paired with pci_hp_ignore_link_change().
+ */
+void pci_hp_unignore_link_change(struct pci_dev *pdev)
+{
+ set_bit(PCI_LINK_CHANGED, &pdev->priv_flags);
+ mb(); /* ensure pci_hp_spurious_link_change() sees either bit set */
+ clear_bit(PCI_LINK_CHANGING, &pdev->priv_flags);
+ wake_up_all(&pci_hp_link_change_wq);
+}
+
+/**
+ * pci_hp_spurious_link_change - check for spurious link changes
+ * @pdev: PCI hotplug bridge
+ *
+ * Check whether a code section is executing concurrently which is causing
+ * spurious link changes on the Secondary Bus of @pdev. Await the end of the
+ * code section if so.
+ *
+ * May be called by hotplug drivers to check whether a link change is spurious
+ * and can be ignored.
+ *
+ * Because a genuine link change may have occurred in-between a spurious link
+ * change and the invocation of this function, hotplug drivers should perform
+ * sanity checks such as retrieving the current link state and bringing down
+ * the slot if the link is down.
+ *
+ * Return: %true if such a code section has been executing concurrently,
+ * otherwise %false. Also return %true if such a code section has not been
+ * executing concurrently, but at least once since the last invocation of this
+ * function.
+ */
+bool pci_hp_spurious_link_change(struct pci_dev *pdev)
+{
+ wait_event(pci_hp_link_change_wq,
+ !test_bit(PCI_LINK_CHANGING, &pdev->priv_flags));
+
+ return test_and_clear_bit(PCI_LINK_CHANGED, &pdev->priv_flags);
+}
+
static int __init pci_hotplug_init(void)
{
int result;
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 273dd8c66f4e..debc79b0adfb 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -187,6 +187,7 @@ int pciehp_card_present(struct controller *ctrl);
int pciehp_card_present_or_link_active(struct controller *ctrl);
int pciehp_check_link_status(struct controller *ctrl);
int pciehp_check_link_active(struct controller *ctrl);
+bool pciehp_device_replaced(struct controller *ctrl);
void pciehp_release_ctrl(struct controller *ctrl);
int pciehp_sysfs_enable_slot(struct hotplug_slot *hotplug_slot);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index ff458e692fed..f59baa912970 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -284,32 +284,6 @@ static int pciehp_suspend(struct pcie_device *dev)
return 0;
}
-static bool pciehp_device_replaced(struct controller *ctrl)
-{
- struct pci_dev *pdev __free(pci_dev_put);
- u32 reg;
-
- pdev = pci_get_slot(ctrl->pcie->port->subordinate, PCI_DEVFN(0, 0));
- if (!pdev)
- return true;
-
- if (pci_read_config_dword(pdev, PCI_VENDOR_ID, &reg) ||
- reg != (pdev->vendor | (pdev->device << 16)) ||
- pci_read_config_dword(pdev, PCI_CLASS_REVISION, &reg) ||
- reg != (pdev->revision | (pdev->class << 8)))
- return true;
-
- if (pdev->hdr_type == PCI_HEADER_TYPE_NORMAL &&
- (pci_read_config_dword(pdev, PCI_SUBSYSTEM_VENDOR_ID, &reg) ||
- reg != (pdev->subsystem_vendor | (pdev->subsystem_device << 16))))
- return true;
-
- if (pci_get_dsn(pdev) != ctrl->dsn)
- return true;
-
- return false;
-}
-
static int pciehp_resume_noirq(struct pcie_device *dev)
{
struct controller *ctrl = get_service_data(dev);
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index dcdbfcf404dd..bcc938d4420f 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -19,6 +19,8 @@
#include <linux/types.h>
#include <linux/pm_runtime.h>
#include <linux/pci.h>
+
+#include "../pci.h"
#include "pciehp.h"
/* The following routines constitute the bulk of the
@@ -127,6 +129,9 @@ static void remove_board(struct controller *ctrl, bool safe_removal)
pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
INDICATOR_NOOP);
+
+ /* Don't carry LBMS indications across */
+ pcie_reset_lbms(ctrl->pcie->port);
}
static int pciehp_enable_slot(struct controller *ctrl);
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 736ad8baa2a5..bcc51b26d03d 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -292,7 +292,7 @@ int pciehp_check_link_status(struct controller *ctrl)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
bool found;
- u16 lnk_status;
+ u16 lnk_status, linksta2;
if (!pcie_wait_for_link(pdev, true)) {
ctrl_info(ctrl, "Slot(%s): No link\n", slot_name(ctrl));
@@ -319,7 +319,8 @@ int pciehp_check_link_status(struct controller *ctrl)
return -1;
}
- pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
+ pcie_capability_read_word(pdev, PCI_EXP_LNKSTA2, &linksta2);
+ __pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status, linksta2);
if (!found) {
ctrl_info(ctrl, "Slot(%s): No device found\n",
@@ -430,7 +431,7 @@ void pciehp_get_latch_status(struct controller *ctrl, u8 *status)
* removed immediately after the check so the caller may need to take
* this into account.
*
- * It the hotplug controller itself is not available anymore returns
+ * If the hotplug controller itself is not available anymore returns
* %-ENODEV.
*/
int pciehp_card_present(struct controller *ctrl)
@@ -562,20 +563,50 @@ void pciehp_power_off_slot(struct controller *ctrl)
PCI_EXP_SLTCTL_PWR_OFF);
}
-static void pciehp_ignore_dpc_link_change(struct controller *ctrl,
- struct pci_dev *pdev, int irq)
+bool pciehp_device_replaced(struct controller *ctrl)
+{
+ struct pci_dev *pdev __free(pci_dev_put) = NULL;
+ u32 reg;
+
+ if (pci_dev_is_disconnected(ctrl->pcie->port))
+ return false;
+
+ pdev = pci_get_slot(ctrl->pcie->port->subordinate, PCI_DEVFN(0, 0));
+ if (!pdev)
+ return true;
+
+ if (pci_read_config_dword(pdev, PCI_VENDOR_ID, &reg) ||
+ reg != (pdev->vendor | (pdev->device << 16)) ||
+ pci_read_config_dword(pdev, PCI_CLASS_REVISION, &reg) ||
+ reg != (pdev->revision | (pdev->class << 8)))
+ return true;
+
+ if (pdev->hdr_type == PCI_HEADER_TYPE_NORMAL &&
+ (pci_read_config_dword(pdev, PCI_SUBSYSTEM_VENDOR_ID, &reg) ||
+ reg != (pdev->subsystem_vendor | (pdev->subsystem_device << 16))))
+ return true;
+
+ if (pci_get_dsn(pdev) != ctrl->dsn)
+ return true;
+
+ return false;
+}
+
+static void pciehp_ignore_link_change(struct controller *ctrl,
+ struct pci_dev *pdev, int irq,
+ u16 ignored_events)
{
/*
* Ignore link changes which occurred while waiting for DPC recovery.
* Could be several if DPC triggered multiple times consecutively.
+ * Also ignore link changes caused by Secondary Bus Reset, etc.
*/
synchronize_hardirq(irq);
- atomic_and(~PCI_EXP_SLTSTA_DLLSC, &ctrl->pending_events);
+ atomic_and(~ignored_events, &ctrl->pending_events);
if (pciehp_poll_mode)
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
- PCI_EXP_SLTSTA_DLLSC);
- ctrl_info(ctrl, "Slot(%s): Link Down/Up ignored (recovered by DPC)\n",
- slot_name(ctrl));
+ ignored_events);
+ ctrl_info(ctrl, "Slot(%s): Link Down/Up ignored\n", slot_name(ctrl));
/*
* If the link is unexpectedly down after successful recovery,
@@ -583,8 +614,8 @@ static void pciehp_ignore_dpc_link_change(struct controller *ctrl,
* Synthesize it to ensure that it is acted on.
*/
down_read_nested(&ctrl->reset_lock, ctrl->depth);
- if (!pciehp_check_link_active(ctrl))
- pciehp_request(ctrl, PCI_EXP_SLTSTA_DLLSC);
+ if (!pciehp_check_link_active(ctrl) || pciehp_device_replaced(ctrl))
+ pciehp_request(ctrl, ignored_events);
up_read(&ctrl->reset_lock);
}
@@ -731,12 +762,19 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
/*
* Ignore Link Down/Up events caused by Downstream Port Containment
- * if recovery from the error succeeded.
+ * if recovery succeeded, or caused by Secondary Bus Reset,
+ * suspend to D3cold, firmware update, FPGA reconfiguration, etc.
*/
- if ((events & PCI_EXP_SLTSTA_DLLSC) && pci_dpc_recovered(pdev) &&
+ if ((events & (PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC)) &&
+ (pci_dpc_recovered(pdev) || pci_hp_spurious_link_change(pdev)) &&
ctrl->state == ON_STATE) {
- events &= ~PCI_EXP_SLTSTA_DLLSC;
- pciehp_ignore_dpc_link_change(ctrl, pdev, irq);
+ u16 ignored_events = PCI_EXP_SLTSTA_DLLSC;
+
+ if (!ctrl->inband_presence_disabled)
+ ignored_events |= PCI_EXP_SLTSTA_PDC;
+
+ events &= ~ignored_events;
+ pciehp_ignore_link_change(ctrl, pdev, irq, ignored_events);
}
/*
@@ -842,7 +880,9 @@ void pcie_enable_interrupt(struct controller *ctrl)
{
u16 mask;
- mask = PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_DLLSCE;
+ mask = PCI_EXP_SLTCTL_DLLSCE;
+ if (!pciehp_poll_mode)
+ mask |= PCI_EXP_SLTCTL_HPIE;
pcie_write_cmd(ctrl, mask, mask);
}
@@ -899,7 +939,6 @@ 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);
- u16 stat_mask = 0, ctrl_mask = 0;
int rc;
if (probe)
@@ -907,23 +946,11 @@ int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, bool probe)
down_write_nested(&ctrl->reset_lock, ctrl->depth);
- if (!ATTN_BUTTN(ctrl)) {
- ctrl_mask |= PCI_EXP_SLTCTL_PDCE;
- stat_mask |= PCI_EXP_SLTSTA_PDC;
- }
- ctrl_mask |= PCI_EXP_SLTCTL_DLLSCE;
- stat_mask |= PCI_EXP_SLTSTA_DLLSC;
-
- pcie_write_cmd(ctrl, 0, ctrl_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0);
+ pci_hp_ignore_link_change(pdev);
rc = pci_bridge_secondary_bus_reset(ctrl->pcie->port);
- pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, stat_mask);
- pcie_write_cmd_nowait(ctrl, ctrl_mask, ctrl_mask);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, ctrl_mask);
+ pci_hp_unignore_link_change(pdev);
up_write(&ctrl->reset_lock);
return rc;
@@ -968,7 +995,7 @@ static inline int pcie_hotplug_depth(struct pci_dev *dev)
while (bus->parent) {
bus = bus->parent;
- if (bus->self && bus->self->is_hotplug_bridge)
+ if (bus->self && bus->self->is_pciehp)
depth++;
}
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 573a41869c15..c5345bff9a55 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -3,12 +3,15 @@
* PCI Hotplug Driver for PowerPC PowerNV platform.
*
* Copyright Gavin Shan, IBM Corporation 2016.
+ * Copyright (C) 2025 Raptor Engineering, LLC
+ * Copyright (C) 2025 Raptor Computing Systems, LLC
*/
#include <linux/bitfield.h>
#include <linux/libfdt.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/delay.h>
#include <linux/pci_hotplug.h>
#include <linux/of_fdt.h>
@@ -36,8 +39,10 @@ static void pnv_php_register(struct device_node *dn);
static void pnv_php_unregister_one(struct device_node *dn);
static void pnv_php_unregister(struct device_node *dn);
+static void pnv_php_enable_irq(struct pnv_php_slot *php_slot);
+
static void pnv_php_disable_irq(struct pnv_php_slot *php_slot,
- bool disable_device)
+ bool disable_device, bool disable_msi)
{
struct pci_dev *pdev = php_slot->pdev;
u16 ctrl;
@@ -53,19 +58,15 @@ static void pnv_php_disable_irq(struct pnv_php_slot *php_slot,
php_slot->irq = 0;
}
- if (php_slot->wq) {
- destroy_workqueue(php_slot->wq);
- php_slot->wq = NULL;
- }
-
- if (disable_device) {
+ if (disable_device || disable_msi) {
if (pdev->msix_enabled)
pci_disable_msix(pdev);
else if (pdev->msi_enabled)
pci_disable_msi(pdev);
+ }
+ if (disable_device)
pci_disable_device(pdev);
- }
}
static void pnv_php_free_slot(struct kref *kref)
@@ -74,7 +75,8 @@ static void pnv_php_free_slot(struct kref *kref)
struct pnv_php_slot, kref);
WARN_ON(!list_empty(&php_slot->children));
- pnv_php_disable_irq(php_slot, false);
+ pnv_php_disable_irq(php_slot, false, false);
+ destroy_workqueue(php_slot->wq);
kfree(php_slot->name);
kfree(php_slot);
}
@@ -391,6 +393,20 @@ static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state)
return 0;
}
+static int pcie_check_link_active(struct pci_dev *pdev)
+{
+ u16 lnk_status;
+ int ret;
+
+ ret = pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnk_status);
+ if (ret == PCIBIOS_DEVICE_NOT_FOUND || PCI_POSSIBLE_ERROR(lnk_status))
+ return -ENODEV;
+
+ ret = !!(lnk_status & PCI_EXP_LNKSTA_DLLLA);
+
+ return ret;
+}
+
static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state)
{
struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
@@ -403,6 +419,19 @@ static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state)
*/
ret = pnv_pci_get_presence_state(php_slot->id, &presence);
if (ret >= 0) {
+ if (pci_pcie_type(php_slot->pdev) == PCI_EXP_TYPE_DOWNSTREAM &&
+ presence == OPAL_PCI_SLOT_EMPTY) {
+ /*
+ * Similar to pciehp_hpc, check whether the Link Active
+ * bit is set to account for broken downstream bridges
+ * that don't properly assert Presence Detect State, as
+ * was observed on the Microsemi Switchtec PM8533 PFX
+ * [11f8:8533].
+ */
+ if (pcie_check_link_active(php_slot->pdev) > 0)
+ presence = OPAL_PCI_SLOT_PRESENT;
+ }
+
*state = presence;
ret = 0;
} else {
@@ -412,10 +441,23 @@ static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state)
return ret;
}
+static int pnv_php_get_raw_indicator_status(struct hotplug_slot *slot, u8 *state)
+{
+ struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
+ struct pci_dev *bridge = php_slot->pdev;
+ u16 status;
+
+ pcie_capability_read_word(bridge, PCI_EXP_SLTCTL, &status);
+ *state = (status & (PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC)) >> 6;
+ return 0;
+}
+
+
static int pnv_php_get_attention_state(struct hotplug_slot *slot, u8 *state)
{
struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
+ pnv_php_get_raw_indicator_status(slot, &php_slot->attention_state);
*state = php_slot->attention_state;
return 0;
}
@@ -433,7 +475,7 @@ static int pnv_php_set_attention_state(struct hotplug_slot *slot, u8 state)
mask = PCI_EXP_SLTCTL_AIC;
if (state)
- new = PCI_EXP_SLTCTL_ATTN_IND_ON;
+ new = FIELD_PREP(PCI_EXP_SLTCTL_AIC, state);
else
new = PCI_EXP_SLTCTL_ATTN_IND_OFF;
@@ -442,6 +484,61 @@ static int pnv_php_set_attention_state(struct hotplug_slot *slot, u8 state)
return 0;
}
+static int pnv_php_activate_slot(struct pnv_php_slot *php_slot,
+ struct hotplug_slot *slot)
+{
+ int ret, i;
+
+ /*
+ * Issue initial slot activation command to firmware
+ *
+ * Firmware will power slot on, attempt to train the link, and
+ * discover any downstream devices. If this process fails, firmware
+ * will return an error code and an invalid device tree. Failure
+ * can be caused for multiple reasons, including a faulty
+ * downstream device, poor connection to the downstream device, or
+ * a previously latched PHB fence. On failure, issue fundamental
+ * reset up to three times before aborting.
+ */
+ ret = pnv_php_set_slot_power_state(slot, OPAL_PCI_SLOT_POWER_ON);
+ if (ret) {
+ SLOT_WARN(
+ php_slot,
+ "PCI slot activation failed with error code %d, possible frozen PHB",
+ ret);
+ SLOT_WARN(
+ php_slot,
+ "Attempting complete PHB reset before retrying slot activation\n");
+ for (i = 0; i < 3; i++) {
+ /*
+ * Slot activation failed, PHB may be fenced from a
+ * prior device failure.
+ *
+ * Use the OPAL fundamental reset call to both try a
+ * device reset and clear any potentially active PHB
+ * fence / freeze.
+ */
+ SLOT_WARN(php_slot, "Try %d...\n", i + 1);
+ pci_set_pcie_reset_state(php_slot->pdev,
+ pcie_warm_reset);
+ msleep(250);
+ pci_set_pcie_reset_state(php_slot->pdev,
+ pcie_deassert_reset);
+
+ ret = pnv_php_set_slot_power_state(
+ slot, OPAL_PCI_SLOT_POWER_ON);
+ if (!ret)
+ break;
+ }
+
+ if (i >= 3)
+ SLOT_WARN(php_slot,
+ "Failed to bring slot online, aborting!\n");
+ }
+
+ return ret;
+}
+
static int pnv_php_enable(struct pnv_php_slot *php_slot, bool rescan)
{
struct hotplug_slot *slot = &php_slot->slot;
@@ -504,7 +601,7 @@ static int pnv_php_enable(struct pnv_php_slot *php_slot, bool rescan)
goto scan;
/* Power is off, turn it on and then scan the slot */
- ret = pnv_php_set_slot_power_state(slot, OPAL_PCI_SLOT_POWER_ON);
+ ret = pnv_php_activate_slot(php_slot, slot);
if (ret)
return ret;
@@ -561,8 +658,58 @@ static int pnv_php_reset_slot(struct hotplug_slot *slot, bool probe)
static int pnv_php_enable_slot(struct hotplug_slot *slot)
{
struct pnv_php_slot *php_slot = to_pnv_php_slot(slot);
+ u32 prop32;
+ int ret;
+
+ ret = pnv_php_enable(php_slot, true);
+ if (ret)
+ return ret;
+
+ /* (Re-)enable interrupt if the slot supports surprise hotplug */
+ ret = of_property_read_u32(php_slot->dn, "ibm,slot-surprise-pluggable",
+ &prop32);
+ if (!ret && prop32)
+ pnv_php_enable_irq(php_slot);
+
+ return 0;
+}
+
+/*
+ * Disable any hotplug interrupts for all slots on the provided bus, as well as
+ * all downstream slots in preparation for a hot unplug.
+ */
+static int pnv_php_disable_all_irqs(struct pci_bus *bus)
+{
+ struct pci_bus *child_bus;
+ struct pci_slot *slot;
+
+ /* First go down child buses */
+ list_for_each_entry(child_bus, &bus->children, node)
+ pnv_php_disable_all_irqs(child_bus);
+
+ /* Disable IRQs for all pnv_php slots on this bus */
+ list_for_each_entry(slot, &bus->slots, list) {
+ struct pnv_php_slot *php_slot = to_pnv_php_slot(slot->hotplug);
- return pnv_php_enable(php_slot, true);
+ pnv_php_disable_irq(php_slot, false, true);
+ }
+
+ return 0;
+}
+
+/*
+ * Disable any hotplug interrupts for all downstream slots on the provided
+ * bus in preparation for a hot unplug.
+ */
+static int pnv_php_disable_all_downstream_irqs(struct pci_bus *bus)
+{
+ struct pci_bus *child_bus;
+
+ /* Go down child buses, recursively deactivating their IRQs */
+ list_for_each_entry(child_bus, &bus->children, node)
+ pnv_php_disable_all_irqs(child_bus);
+
+ return 0;
}
static int pnv_php_disable_slot(struct hotplug_slot *slot)
@@ -579,6 +726,13 @@ static int pnv_php_disable_slot(struct hotplug_slot *slot)
php_slot->state != PNV_PHP_STATE_REGISTERED)
return 0;
+ /*
+ * Free all IRQ resources from all child slots before remove.
+ * Note that we do not disable the root slot IRQ here as that
+ * would also deactivate the slot hot (re)plug interrupt!
+ */
+ pnv_php_disable_all_downstream_irqs(php_slot->bus);
+
/* Remove all devices behind the slot */
pci_lock_rescan_remove();
pci_hp_remove_devices(php_slot->bus);
@@ -647,6 +801,15 @@ static struct pnv_php_slot *pnv_php_alloc_slot(struct device_node *dn)
return NULL;
}
+ /* Allocate workqueue for this slot's interrupt handling */
+ php_slot->wq = alloc_workqueue("pciehp-%s", 0, 0, php_slot->name);
+ if (!php_slot->wq) {
+ SLOT_WARN(php_slot, "Cannot alloc workqueue\n");
+ kfree(php_slot->name);
+ kfree(php_slot);
+ return NULL;
+ }
+
if (dn->child && PCI_DN(dn->child))
php_slot->slot_no = PCI_SLOT(PCI_DN(dn->child)->devfn);
else
@@ -745,16 +908,63 @@ static int pnv_php_enable_msix(struct pnv_php_slot *php_slot)
return entry.vector;
}
+static void
+pnv_php_detect_clear_suprise_removal_freeze(struct pnv_php_slot *php_slot)
+{
+ struct pci_dev *pdev = php_slot->pdev;
+ struct eeh_dev *edev;
+ struct eeh_pe *pe;
+ int i, rc;
+
+ /*
+ * When a device is surprise removed from a downstream bridge slot,
+ * the upstream bridge port can still end up frozen due to related EEH
+ * events, which will in turn block the MSI interrupts for slot hotplug
+ * detection.
+ *
+ * Detect and thaw any frozen upstream PE after slot deactivation.
+ */
+ edev = pci_dev_to_eeh_dev(pdev);
+ pe = edev ? edev->pe : NULL;
+ rc = eeh_pe_get_state(pe);
+ if ((rc == -ENODEV) || (rc == -ENOENT)) {
+ SLOT_WARN(
+ php_slot,
+ "Upstream bridge PE state unknown, hotplug detect may fail\n");
+ } else {
+ if (pe->state & EEH_PE_ISOLATED) {
+ SLOT_WARN(
+ php_slot,
+ "Upstream bridge PE %02x frozen, thawing...\n",
+ pe->addr);
+ for (i = 0; i < 3; i++)
+ if (!eeh_unfreeze_pe(pe))
+ break;
+ if (i >= 3)
+ SLOT_WARN(
+ php_slot,
+ "Unable to thaw PE %02x, hotplug detect will fail!\n",
+ pe->addr);
+ else
+ SLOT_WARN(php_slot,
+ "PE %02x thawed successfully\n",
+ pe->addr);
+ }
+ }
+}
+
static void pnv_php_event_handler(struct work_struct *work)
{
struct pnv_php_event *event =
container_of(work, struct pnv_php_event, work);
struct pnv_php_slot *php_slot = event->php_slot;
- if (event->added)
+ if (event->added) {
pnv_php_enable_slot(&php_slot->slot);
- else
+ } else {
pnv_php_disable_slot(&php_slot->slot);
+ pnv_php_detect_clear_suprise_removal_freeze(php_slot);
+ }
kfree(event);
}
@@ -843,14 +1053,6 @@ static void pnv_php_init_irq(struct pnv_php_slot *php_slot, int irq)
u16 sts, ctrl;
int ret;
- /* Allocate workqueue */
- php_slot->wq = alloc_workqueue("pciehp-%s", 0, 0, php_slot->name);
- if (!php_slot->wq) {
- SLOT_WARN(php_slot, "Cannot alloc workqueue\n");
- pnv_php_disable_irq(php_slot, true);
- return;
- }
-
/* Check PDC (Presence Detection Change) is broken or not */
ret = of_property_read_u32(php_slot->dn, "ibm,slot-broken-pdc",
&broken_pdc);
@@ -869,7 +1071,7 @@ static void pnv_php_init_irq(struct pnv_php_slot *php_slot, int irq)
ret = request_irq(irq, pnv_php_interrupt, IRQF_SHARED,
php_slot->name, php_slot);
if (ret) {
- pnv_php_disable_irq(php_slot, true);
+ pnv_php_disable_irq(php_slot, true, true);
SLOT_WARN(php_slot, "Error %d enabling IRQ %d\n", ret, irq);
return;
}
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index 055518ee354d..a55967082ef6 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -8,8 +8,7 @@
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
-#define KMSG_COMPONENT "zpci"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "zpci: " fmt
#include <linux/kernel.h>
#include <linux/slab.h>
@@ -59,16 +58,15 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
if (pdev && pci_num_vf(pdev)) {
- pci_dev_put(pdev);
rc = -EBUSY;
goto out;
}
rc = zpci_deconfigure_device(zdev);
out:
- mutex_unlock(&zdev->state_lock);
if (pdev)
pci_dev_put(pdev);
+ mutex_unlock(&zdev->state_lock);
return rc;
}
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index f0e2d2d54d71..a425530e0939 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -33,24 +33,8 @@ extern bool shpchp_poll_mode;
extern int shpchp_poll_time;
extern bool shpchp_debug;
-#define dbg(format, arg...) \
-do { \
- if (shpchp_debug) \
- printk(KERN_DEBUG "%s: " format, MY_NAME, ## arg); \
-} while (0)
-#define err(format, arg...) \
- printk(KERN_ERR "%s: " format, MY_NAME, ## arg)
-#define info(format, arg...) \
- printk(KERN_INFO "%s: " format, MY_NAME, ## arg)
-#define warn(format, arg...) \
- printk(KERN_WARNING "%s: " format, MY_NAME, ## arg)
-
#define ctrl_dbg(ctrl, format, arg...) \
- do { \
- if (shpchp_debug) \
- pci_printk(KERN_DEBUG, ctrl->pci_dev, \
- format, ## arg); \
- } while (0)
+ pci_dbg(ctrl->pci_dev, format, ## arg)
#define ctrl_err(ctrl, format, arg...) \
pci_err(ctrl->pci_dev, format, ## arg)
#define ctrl_info(ctrl, format, arg...) \
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index a92e28b72908..0c341453afc6 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -22,7 +22,6 @@
#include "shpchp.h"
/* Global variables */
-bool shpchp_debug;
bool shpchp_poll_mode;
int shpchp_poll_time;
@@ -33,10 +32,8 @@ int shpchp_poll_time;
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
-module_param(shpchp_debug, bool, 0644);
module_param(shpchp_poll_mode, bool, 0644);
module_param(shpchp_poll_time, int, 0644);
-MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
@@ -324,20 +321,12 @@ static struct pci_driver shpc_driver = {
static int __init shpcd_init(void)
{
- int retval;
-
- retval = pci_register_driver(&shpc_driver);
- dbg("%s: pci_register_driver = %d\n", __func__, retval);
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
-
- return retval;
+ return pci_register_driver(&shpc_driver);
}
static void __exit shpcd_cleanup(void)
{
- dbg("unload_shpchpd()\n");
pci_unregister_driver(&shpc_driver);
- info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}
module_init(shpcd_init);
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 012b9e3fe5b0..183bf43510a1 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -211,7 +211,7 @@ static inline int shpc_indirect_read(struct controller *ctrl, int index,
*/
static void int_poll_timeout(struct timer_list *t)
{
- struct controller *ctrl = from_timer(ctrl, t, poll_timer);
+ struct controller *ctrl = timer_container_of(ctrl, t, poll_timer);
/* Poll for interrupt events. regs == NULL => polling */
shpc_isr(0, ctrl);
@@ -564,7 +564,7 @@ void shpchp_release_ctlr(struct controller *ctrl)
shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
if (shpchp_poll_mode)
- del_timer(&ctrl->poll_timer);
+ timer_delete(&ctrl->poll_timer);
else {
free_irq(ctrl->pci_dev->irq, ctrl);
pci_disable_msi(ctrl->pci_dev);
@@ -675,7 +675,7 @@ static int shpc_get_cur_bus_speed(struct controller *ctrl)
out:
bus->cur_bus_speed = bus_speed;
- dbg("Current bus speed = %d\n", bus_speed);
+ ctrl_dbg(ctrl, "Current bus speed = %d\n", bus_speed);
return retval;
}
generated by cgit (git 2.34.1) at 2025-12-25 04:55:25 +0000