diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2018-10-20 11:45:29 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-10-20 11:45:29 -0500 |
| commit | 20634dc361e1c5fe2dae380a7d0a21ca7f32c4f7 (patch) | |
| tree | 51666a1885b3b682120553219265722db5eddac4 /drivers/pci | |
| parent | de468b755464426c276df2daf1e54bcd64186020 (diff) | |
| parent | e51cd9ce5dd3b10f9e67a30a4dc00fc1fa80c673 (diff) | |
Merge branch 'pci/hotplug'
- Differentiate between pciehp surprise and safe removal (Lukas Wunner)
- Remove unnecessary pciehp includes (Lukas Wunner)
- Drop pciehp hotplug_slot_ops wrappers (Lukas Wunner)
- Tolerate PCIe Slot Presence Detect being hardwired to zero to
workaround broken hardware, e.g., the Wilocity switch/wireless device
(Lukas Wunner)
- Unify pciehp controller & slot structs (Lukas Wunner)
- Constify hotplug_slot_ops (Lukas Wunner)
- Drop hotplug_slot_info (Lukas Wunner)
- Embed hotplug_slot struct into users instead of allocating it
separately (Lukas Wunner)
- Initialize PCIe port service drivers directly instead of relying on
initcall ordering (Keith Busch)
- Restore PCI config state after a slot reset (Keith Busch)
- Save/restore DPC config state along with other PCI config state (Keith
Busch)
- Reference count devices during AER handling to avoid race issue with
concurrent hot removal (Keith Busch)
- If an Upstream Port reports ERR_FATAL, don't try to read the Port's
config space because it is probably unreachable (Keith Busch)
- During error handling, use slot-specific reset instead of secondary
bus reset to avoid link up/down issues on hotplug ports (Keith Busch)
- Restore previous AER/DPC handling that does not remove and re-enumerate
devices on ERR_FATAL (Keith Busch)
- Notify all drivers that may be affected by error recovery resets (Keith
Busch)
- Always generate error recovery uevents, even if a driver doesn't have
error callbacks (Keith Busch)
- Make PCIe link active reporting detection generic (Keith Busch)
- Support D3cold in PCIe hierarchies during system sleep and runtime,
including hotplug and Thunderbolt ports (Mika Westerberg)
- Handle hpmemsize/hpiosize kernel parameters uniformly, whether slots
are empty or occupied (Jon Derrick)
- Remove duplicated include from pci/pcie/err.c and unused variable from
cpqphp (YueHaibing)
- Remove driver pci_cleanup_aer_uncorrect_error_status() calls (Oza
Pawandeep)
- Uninline PCI bus accessors for better ftracing (Keith Busch)
- Remove unused AER Root Port .error_resume method (Keith Busch)
- Use kfifo in AER instead of a local version (Keith Busch)
- Use threaded IRQ in AER bottom half (Keith Busch)
- Use managed resources in AER core (Keith Busch)
- Reuse pcie_port_find_device() for AER injection (Keith Busch)
- Abstract AER interrupt handling to disconnect error injection (Keith
Busch)
- Refactor AER injection callbacks to simplify future improvments (Keith
Busch)
* pci/hotplug:
PCI/AER: Refactor error injection fallbacks
PCI/AER: Abstract AER interrupt handling
PCI/AER: Reuse existing pcie_port_find_device() interface
PCI/AER: Use managed resource allocations
PCI/AER: Use threaded IRQ for bottom half
PCI/AER: Use kfifo_in_spinlocked() to insert locked elements
PCI/AER: Use kfifo for tracking events instead of reimplementing it
PCI/AER: Remove error source from AER struct aer_rpc
PCI/AER: Remove unused aer_error_resume()
PCI: Uninline PCI bus accessors for better ftracing
PCI/AER: Remove pci_cleanup_aer_uncorrect_error_status() calls
PCI: pnv_php: Use kmemdup()
PCI: cpqphp: Remove set but not used variable 'physical_slot'
PCI/ERR: Remove duplicated include from err.c
PCI: Equalize hotplug memory and io for occupied and empty slots
PCI / ACPI: Whitelist D3 for more PCIe hotplug ports
ACPI / property: Allow multiple property compatible _DSD entries
PCI/PME: Implement runtime PM callbacks
PCI: pciehp: Implement runtime PM callbacks
PCI/portdrv: Add runtime PM hooks for port service drivers
PCI/portdrv: Resume upon exit from system suspend if left runtime suspended
PCI: pciehp: Do not handle events if interrupts are masked
PCI: pciehp: Disable hotplug interrupt during suspend
PCI / ACPI: Enable wake automatically for power managed bridges
PCI: Do not skip power-managed bridges in pci_enable_wake()
PCI: Make link active reporting detection generic
PCI: Unify device inaccessible
PCI/ERR: Always report current recovery status for udev
PCI/ERR: Simplify broadcast callouts
PCI/ERR: Run error recovery callbacks for all affected devices
PCI/ERR: Handle fatal error recovery
PCI/ERR: Use slot reset if available
PCI/AER: Don't read upstream ports below fatal errors
PCI/AER: Take reference on error devices
PCI/DPC: Save and restore config state
PCI: portdrv: Restore PCI config state on slot reset
PCI: portdrv: Initialize service drivers directly
PCI: hotplug: Document TODOs
PCI: hotplug: Embed hotplug_slot
PCI: hotplug: Drop hotplug_slot_info
PCI: hotplug: Constify hotplug_slot_ops
PCI: pciehp: Reshuffle controller struct for clarity
PCI: pciehp: Rename controller struct members for clarity
PCI: pciehp: Unify controller and slot structs
PCI: pciehp: Tolerate Presence Detect hardwired to zero
PCI: pciehp: Drop hotplug_slot_ops wrappers
PCI: pciehp: Drop unnecessary includes
PCI: pciehp: Differentiate between surprise and safe removal
PCI: Simplify disconnected marking
Diffstat (limited to 'drivers/pci')
44 files changed, 1254 insertions, 1484 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index a3ad2fe185b9..544922f097c0 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -33,7 +33,7 @@ DEFINE_RAW_SPINLOCK(pci_lock); #endif #define PCI_OP_READ(size, type, len) \ -int pci_bus_read_config_##size \ +int noinline pci_bus_read_config_##size \ (struct pci_bus *bus, unsigned int devfn, int pos, type *value) \ { \ int res; \ @@ -48,7 +48,7 @@ int pci_bus_read_config_##size \ } #define PCI_OP_WRITE(size, type, len) \ -int pci_bus_write_config_##size \ +int noinline pci_bus_write_config_##size \ (struct pci_bus *bus, unsigned int devfn, int pos, type value) \ { \ int res; \ diff --git a/drivers/pci/hotplug/TODO b/drivers/pci/hotplug/TODO new file mode 100644 index 000000000000..a32070be5adf --- /dev/null +++ b/drivers/pci/hotplug/TODO @@ -0,0 +1,74 @@ +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? + +cpqphp: + +* The driver spawns a kthread cpqhp_event_thread() which is woken by the + hardirq handler cpqhp_ctrl_intr(). Convert this to threaded IRQ handling. + The kthread is also woken from the timer pushbutton_helper_thread(), + convert it to call irq_wake_thread(). Use pciehp as a template. + +* A large portion of cpqphp_ctrl.c and cpqphp_pci.c concerns resource + management. Doesn't this duplicate functionality in the core? + +ibmphp: + +* Implementations of hotplug_slot_ops callbacks such as get_adapter_present() + in ibmphp_core.c create a copy of the struct slot on the stack, then perform + the actual operation on that copy. Determine if this overhead is necessary, + delete it if not. The functions also perform a NULL pointer check on the + struct hotplug_slot, this seems superfluous. + +* Several functions access the pci_slot member in struct hotplug_slot even + though pci_hotplug.h declares it private. See get_max_bus_speed() for an + example. Either the pci_slot member should no longer be declared private + or ibmphp should store a pointer to its bus in struct slot. Probably the + former. + +* The functions get_max_adapter_speed() and get_bus_name() are commented out. + Can they be deleted? There are also forward declarations at the top of + ibmphp_core.c as well as pointers in ibmphp_hotplug_slot_ops, likewise + commented out. + +* ibmphp_init_devno() takes a struct slot **, it could instead take a + struct slot *. + +* The return value of pci_hp_register() is not checked. + +* iounmap(io_mem) is called in the error path of ebda_rsrc_controller() + and once more in the error path of its caller ibmphp_access_ebda(). + +* The various slot data structures are difficult to follow and need to be + simplified. A lot of functions are too large and too complex, they need + to be broken up into smaller, manageable pieces. Negative examples are + ebda_rsrc_controller() and configure_bridge(). + +* A large portion of ibmphp_res.c and ibmphp_pci.c concerns resource + management. Doesn't this duplicate functionality in the core? + +sgi_hotplug: + +* Several functions access the pci_slot member in struct hotplug_slot even + though pci_hotplug.h declares it private. See sn_hp_destroy() for an + example. Either the pci_slot member should no longer be declared private + or sgi_hotplug should store a pointer to it in struct slot. Probably the + former. + +shpchp: + +* There is only a single implementation of struct hpc_ops. Can the struct be + removed and its functions invoked directly? This has already been done in + pciehp with commit 82a9e79ef132 ("PCI: pciehp: remove hpc_ops"). Clarify + if there was a specific reason not to apply the same change to shpchp. + +* The ->get_mode1_ECC_cap callback in shpchp_hpc_ops is never invoked. + Why was it introduced? Can it be removed? + +* The hardirq handler shpc_isr() queues events on a workqueue. It can be + simplified by converting it to threaded IRQ handling. Use pciehp as a + template. diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h index e438a2d734f2..cf3058404f41 100644 --- a/drivers/pci/hotplug/acpiphp.h +++ b/drivers/pci/hotplug/acpiphp.h @@ -33,15 +33,19 @@ struct acpiphp_slot; * struct slot - slot information for each *physical* slot */ struct slot { - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct acpiphp_slot *acpi_slot; - struct hotplug_slot_info info; unsigned int sun; /* ACPI _SUN (Slot User Number) value */ }; static inline const char *slot_name(struct slot *slot) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(&slot->hotplug_slot); +} + +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); } /* diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c index ad32ffbc4b91..c9e2bd40c038 100644 --- a/drivers/pci/hotplug/acpiphp_core.c +++ b/drivers/pci/hotplug/acpiphp_core.c @@ -57,7 +57,7 @@ static int get_attention_status(struct hotplug_slot *slot, u8 *value); static int get_latch_status(struct hotplug_slot *slot, u8 *value); static int get_adapter_status(struct hotplug_slot *slot, u8 *value); -static struct hotplug_slot_ops acpi_hotplug_slot_ops = { +static const struct hotplug_slot_ops acpi_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .set_attention_status = set_attention_status, @@ -118,7 +118,7 @@ EXPORT_SYMBOL_GPL(acpiphp_unregister_attention); */ static int enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -135,7 +135,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) */ static int disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -179,7 +179,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) */ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -225,7 +225,7 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) */ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -245,7 +245,7 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) */ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -266,39 +266,26 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot, if (!slot) goto error; - slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL); - if (!slot->hotplug_slot) - goto error_slot; - - slot->hotplug_slot->info = &slot->info; - - slot->hotplug_slot->private = slot; - slot->hotplug_slot->ops = &acpi_hotplug_slot_ops; + slot->hotplug_slot.ops = &acpi_hotplug_slot_ops; slot->acpi_slot = acpiphp_slot; - slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot); - slot->hotplug_slot->info->attention_status = 0; - slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot); - slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot); acpiphp_slot->slot = slot; slot->sun = sun; snprintf(name, SLOT_NAME_SIZE, "%u", sun); - retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus, + retval = pci_hp_register(&slot->hotplug_slot, acpiphp_slot->bus, acpiphp_slot->device, name); if (retval == -EBUSY) - goto error_hpslot; + goto error_slot; if (retval) { pr_err("pci_hp_register failed with error %d\n", retval); - goto error_hpslot; + goto error_slot; } pr_info("Slot [%s] registered\n", slot_name(slot)); return 0; -error_hpslot: - kfree(slot->hotplug_slot); error_slot: kfree(slot); error: @@ -312,8 +299,7 @@ void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot) pr_info("Slot [%s] unregistered\n", slot_name(slot)); - pci_hp_deregister(slot->hotplug_slot); - kfree(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); kfree(slot); } diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c index 41713f16ff97..df48b3b03ab4 100644 --- a/drivers/pci/hotplug/acpiphp_ibm.c +++ b/drivers/pci/hotplug/acpiphp_ibm.c @@ -41,7 +41,7 @@ MODULE_VERSION(DRIVER_VERSION); #define IBM_HARDWARE_ID1 "IBM37D0" #define IBM_HARDWARE_ID2 "IBM37D4" -#define hpslot_to_sun(A) (((struct slot *)((A)->private))->sun) +#define hpslot_to_sun(A) (to_slot(A)->sun) /* union apci_descriptor - allows access to the * various device descriptors that are embedded in the diff --git a/drivers/pci/hotplug/cpci_hotplug.h b/drivers/pci/hotplug/cpci_hotplug.h index 4658557be01a..f33ff2bca414 100644 --- a/drivers/pci/hotplug/cpci_hotplug.h +++ b/drivers/pci/hotplug/cpci_hotplug.h @@ -32,8 +32,10 @@ struct slot { unsigned int devfn; struct pci_bus *bus; struct pci_dev *dev; + unsigned int latch_status:1; + unsigned int adapter_status:1; unsigned int extracting; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct list_head slot_list; }; @@ -58,7 +60,12 @@ struct cpci_hp_controller { static inline const char *slot_name(struct slot *slot) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(&slot->hotplug_slot); +} + +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); } int cpci_hp_register_controller(struct cpci_hp_controller *controller); diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c index 52a339baf06c..603eadf3d965 100644 --- a/drivers/pci/hotplug/cpci_hotplug_core.c +++ b/drivers/pci/hotplug/cpci_hotplug_core.c @@ -57,7 +57,7 @@ static int get_attention_status(struct hotplug_slot *slot, u8 *value); static int get_adapter_status(struct hotplug_slot *slot, u8 *value); static int get_latch_status(struct hotplug_slot *slot, u8 *value); -static struct hotplug_slot_ops cpci_hotplug_slot_ops = { +static const struct hotplug_slot_ops cpci_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .set_attention_status = set_attention_status, @@ -68,29 +68,9 @@ static struct hotplug_slot_ops cpci_hotplug_slot_ops = { }; static int -update_latch_status(struct hotplug_slot *hotplug_slot, u8 value) -{ - struct hotplug_slot_info info; - - memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); - info.latch_status = value; - return pci_hp_change_slot_info(hotplug_slot, &info); -} - -static int -update_adapter_status(struct hotplug_slot *hotplug_slot, u8 value) -{ - struct hotplug_slot_info info; - - memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); - info.adapter_status = value; - return pci_hp_change_slot_info(hotplug_slot, &info); -} - -static int enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int retval = 0; dbg("%s - physical_slot = %s", __func__, slot_name(slot)); @@ -103,7 +83,7 @@ enable_slot(struct hotplug_slot *hotplug_slot) static int disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int retval = 0; dbg("%s - physical_slot = %s", __func__, slot_name(slot)); @@ -135,8 +115,7 @@ disable_slot(struct hotplug_slot *hotplug_slot) goto disable_error; } - if (update_adapter_status(slot->hotplug_slot, 0)) - warn("failure to update adapter file"); + slot->adapter_status = 0; if (slot->extracting) { slot->extracting = 0; @@ -160,7 +139,7 @@ cpci_get_power_status(struct slot *slot) static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); *value = cpci_get_power_status(slot); return 0; @@ -169,7 +148,7 @@ get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); *value = cpci_get_attention_status(slot); return 0; @@ -178,27 +157,29 @@ get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { - return cpci_set_attention_status(hotplug_slot->private, status); + return cpci_set_attention_status(to_slot(hotplug_slot), status); } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - *value = hotplug_slot->info->adapter_status; + struct slot *slot = to_slot(hotplug_slot); + + *value = slot->adapter_status; return 0; } static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { - *value = hotplug_slot->info->latch_status; + struct slot *slot = to_slot(hotplug_slot); + + *value = slot->latch_status; return 0; } static void release_slot(struct slot *slot) { - kfree(slot->hotplug_slot->info); - kfree(slot->hotplug_slot); pci_dev_put(slot->dev); kfree(slot); } @@ -209,8 +190,6 @@ int cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) { struct slot *slot; - struct hotplug_slot *hotplug_slot; - struct hotplug_slot_info *info; char name[SLOT_NAME_SIZE]; int status; int i; @@ -229,43 +208,19 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) goto error; } - hotplug_slot = - kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); - if (!hotplug_slot) { - status = -ENOMEM; - goto error_slot; - } - slot->hotplug_slot = hotplug_slot; - - info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); - if (!info) { - status = -ENOMEM; - goto error_hpslot; - } - hotplug_slot->info = info; - slot->bus = bus; slot->number = i; slot->devfn = PCI_DEVFN(i, 0); snprintf(name, SLOT_NAME_SIZE, "%02x:%02x", bus->number, i); - hotplug_slot->private = slot; - hotplug_slot->ops = &cpci_hotplug_slot_ops; - - /* - * Initialize the slot info structure with some known - * good values. - */ - dbg("initializing slot %s", name); - info->power_status = cpci_get_power_status(slot); - info->attention_status = cpci_get_attention_status(slot); + slot->hotplug_slot.ops = &cpci_hotplug_slot_ops; dbg("registering slot %s", name); - status = pci_hp_register(slot->hotplug_slot, bus, i, name); + status = pci_hp_register(&slot->hotplug_slot, bus, i, name); if (status) { err("pci_hp_register failed with error %d", status); - goto error_info; + goto error_slot; } dbg("slot registered with name: %s", slot_name(slot)); @@ -276,10 +231,6 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) up_write(&list_rwsem); } return 0; -error_info: - kfree(info); -error_hpslot: - kfree(hotplug_slot); error_slot: kfree(slot); error: @@ -305,7 +256,7 @@ cpci_hp_unregister_bus(struct pci_bus *bus) slots--; dbg("deregistering slot %s", slot_name(slot)); - pci_hp_deregister(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); release_slot(slot); } } @@ -359,10 +310,8 @@ init_slots(int clear_ins) __func__, slot_name(slot)); dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); if (dev) { - if (update_adapter_status(slot->hotplug_slot, 1)) - warn("failure to update adapter file"); - if (update_latch_status(slot->hotplug_slot, 1)) - warn("failure to update latch file"); + slot->adapter_status = 1; + slot->latch_status = 1; slot->dev = dev; } } @@ -424,11 +373,8 @@ check_slots(void) dbg("%s - slot %s HS_CSR (2) = %04x", __func__, slot_name(slot), hs_csr); - if (update_latch_status(slot->hotplug_slot, 1)) - warn("failure to update latch file"); - - if (update_adapter_status(slot->hotplug_slot, 1)) - warn("failure to update adapter file"); + slot->latch_status = 1; + slot->adapter_status = 1; cpci_led_off(slot); @@ -449,9 +395,7 @@ check_slots(void) __func__, slot_name(slot), hs_csr); if (!slot->extracting) { - if (update_latch_status(slot->hotplug_slot, 0)) - warn("failure to update latch file"); - + slot->latch_status = 0; slot->extracting = 1; atomic_inc(&extracting); } @@ -465,8 +409,7 @@ check_slots(void) */ err("card in slot %s was improperly removed", slot_name(slot)); - if (update_adapter_status(slot->hotplug_slot, 0)) - warn("failure to update adapter file"); + slot->adapter_status = 0; slot->extracting = 0; atomic_dec(&extracting); } @@ -615,7 +558,7 @@ cleanup_slots(void) goto cleanup_null; list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { list_del(&slot->slot_list); - pci_hp_deregister(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); release_slot(slot); } cleanup_null: diff --git a/drivers/pci/hotplug/cpci_hotplug_pci.c b/drivers/pci/hotplug/cpci_hotplug_pci.c index 389b8fb50cd9..2c16adb7f4ec 100644 --- a/drivers/pci/hotplug/cpci_hotplug_pci.c +++ b/drivers/pci/hotplug/cpci_hotplug_pci.c @@ -194,8 +194,7 @@ int cpci_led_on(struct slot *slot) slot->devfn, hs_cap + 2, hs_csr)) { - err("Could not set LOO for slot %s", - hotplug_slot_name(slot->hotplug_slot)); + err("Could not set LOO for slot %s", slot_name(slot)); return -ENODEV; } } @@ -223,8 +222,7 @@ int cpci_led_off(struct slot *slot) slot->devfn, hs_cap + 2, hs_csr)) { - err("Could not clear LOO for slot %s", - hotplug_slot_name(slot->hotplug_slot)); + err("Could not clear LOO for slot %s", slot_name(slot)); return -ENODEV; } } diff --git a/drivers/pci/hotplug/cpqphp.h b/drivers/pci/hotplug/cpqphp.h index db78b394a075..77e4e0142fbc 100644 --- a/drivers/pci/hotplug/cpqphp.h +++ b/drivers/pci/hotplug/cpqphp.h @@ -260,7 +260,7 @@ struct slot { u8 hp_slot; struct controller *ctrl; void __iomem *p_sm_slot; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; }; struct pci_resource { @@ -445,7 +445,12 @@ extern u8 cpqhp_disk_irq; static inline const char *slot_name(struct slot *slot) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(&slot->hotplug_slot); +} + +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); } /* diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c index 5a06636e910a..16bbb183695a 100644 --- a/drivers/pci/hotplug/cpqphp_core.c +++ b/drivers/pci/hotplug/cpqphp_core.c @@ -121,7 +121,6 @@ static int init_SERR(struct controller *ctrl) { u32 tempdword; u32 number_of_slots; - u8 physical_slot; if (!ctrl) return 1; @@ -131,7 +130,6 @@ static int init_SERR(struct controller *ctrl) number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; /* Loop through slots */ while (number_of_slots) { - physical_slot = tempdword; writeb(0, ctrl->hpc_reg + SLOT_SERR); tempdword++; number_of_slots--; @@ -275,9 +273,7 @@ static int ctrl_slot_cleanup(struct controller *ctrl) while (old_slot) { next_slot = old_slot->next; - pci_hp_deregister(old_slot->hotplug_slot); - kfree(old_slot->hotplug_slot->info); - kfree(old_slot->hotplug_slot); + pci_hp_deregister(&old_slot->hotplug_slot); kfree(old_slot); old_slot = next_slot; } @@ -419,7 +415,7 @@ cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { struct pci_func *slot_func; - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; u8 bus; u8 devfn; @@ -446,7 +442,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) static int process_SI(struct hotplug_slot *hotplug_slot) { struct pci_func *slot_func; - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; u8 bus; u8 devfn; @@ -478,7 +474,7 @@ static int process_SI(struct hotplug_slot *hotplug_slot) static int process_SS(struct hotplug_slot *hotplug_slot) { struct pci_func *slot_func; - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; u8 bus; u8 devfn; @@ -505,7 +501,7 @@ static int process_SS(struct hotplug_slot *hotplug_slot) static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -516,7 +512,7 @@ static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -527,7 +523,7 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -538,7 +534,7 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -550,7 +546,7 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct controller *ctrl = slot->ctrl; dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); @@ -560,7 +556,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) return 0; } -static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { +static const struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { .set_attention_status = set_attention_status, .enable_slot = process_SI, .disable_slot = process_SS, @@ -578,8 +574,6 @@ static int ctrl_slot_setup(struct controller *ctrl, void __iomem *smbios_table) { struct slot *slot; - struct hotplug_slot *hotplug_slot; - struct hotplug_slot_info *hotplug_slot_info; struct pci_bus *bus = ctrl->pci_bus; u8 number_of_slots; u8 slot_device; @@ -605,22 +599,6 @@ static int ctrl_slot_setup(struct controller *ctrl, goto error; } - slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)), - GFP_KERNEL); - if (!slot->hotplug_slot) { - result = -ENOMEM; - goto error_slot; - } - hotplug_slot = slot->hotplug_slot; - - hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)), - GFP_KERNEL); - if (!hotplug_slot->info) { - result = -ENOMEM; - goto error_hpslot; - } - hotplug_slot_info = hotplug_slot->info; - slot->ctrl = ctrl; slot->bus = ctrl->bus; slot->device = slot_device; @@ -669,29 +647,20 @@ static int ctrl_slot_setup(struct controller *ctrl, ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; /* register this slot with the hotplug pci core */ - hotplug_slot->private = slot; snprintf(name, SLOT_NAME_SIZE, "%u", slot->number); - hotplug_slot->ops = &cpqphp_hotplug_slot_ops; - - hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot); - hotplug_slot_info->attention_status = - cpq_get_attention_status(ctrl, slot); - hotplug_slot_info->latch_status = - cpq_get_latch_status(ctrl, slot); - hotplug_slot_info->adapter_status = - get_presence_status(ctrl, slot); + slot->hotplug_slot.ops = &cpqphp_hotplug_slot_ops; dbg("registering bus %d, dev %d, number %d, ctrl->slot_device_offset %d, slot %d\n", slot->bus, slot->device, slot->number, ctrl->slot_device_offset, slot_number); - result = pci_hp_register(hotplug_slot, + result = pci_hp_register(&slot->hotplug_slot, ctrl->pci_dev->bus, slot->device, name); if (result) { err("pci_hp_register failed with error %d\n", result); - goto error_info; + goto error_slot; } slot->next = ctrl->slot; @@ -703,10 +672,6 @@ static int ctrl_slot_setup(struct controller *ctrl, } return 0; -error_info: - kfree(hotplug_slot_info); -error_hpslot: - kfree(hotplug_slot); error_slot: kfree(slot); error: diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c index 616df442520b..b7f4e1f099d9 100644 --- a/drivers/pci/hotplug/cpqphp_ctrl.c +++ b/drivers/pci/hotplug/cpqphp_ctrl.c @@ -1130,9 +1130,7 @@ static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_ for (slot = ctrl->slot; slot; slot = slot->next) { if (slot->device == (hp_slot + ctrl->slot_device_offset)) continue; - if (!slot->hotplug_slot || !slot->hotplug_slot->info) - continue; - if (slot->hotplug_slot->info->adapter_status == 0) + if (get_presence_status(ctrl, slot) == 0) continue; /* If another adapter is running on the same segment but at a * lower speed/mode, we allow the new adapter to function at @@ -1767,24 +1765,6 @@ void cpqhp_event_stop_thread(void) } -static int update_slot_info(struct controller *ctrl, struct slot *slot) -{ - struct hotplug_slot_info *info; - int result; - - info = kmalloc(sizeof(*info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - info->power_status = get_slot_enabled(ctrl, slot); - info->attention_status = cpq_get_attention_status(ctrl, slot); - info->latch_status = cpq_get_latch_status(ctrl, slot); - info->adapter_status = get_presence_status(ctrl, slot); - result = pci_hp_change_slot_info(slot->hotplug_slot, info); - kfree(info); - return result; -} - static void interrupt_event_handler(struct controller *ctrl) { int loop = 0; @@ -1884,9 +1864,6 @@ static void interrupt_event_handler(struct controller *ctrl) /***********POWER FAULT */ else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { dbg("power fault\n"); - } else { - /* refresh notification */ - update_slot_info(ctrl, p_slot); } ctrl->event_queue[loop].event_type = 0; @@ -2057,9 +2034,6 @@ int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func) if (rc) dbg("%s: rc = %d\n", __func__, rc); - if (p_slot) - update_slot_info(ctrl, p_slot); - return rc; } @@ -2125,9 +2099,6 @@ int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func) rc = 1; } - if (p_slot) - update_slot_info(ctrl, p_slot); - return rc; } diff --git a/drivers/pci/hotplug/ibmphp.h b/drivers/pci/hotplug/ibmphp.h index fddb78606c74..b89f850c3a4e 100644 --- a/drivers/pci/hotplug/ibmphp.h +++ b/drivers/pci/hotplug/ibmphp.h @@ -698,7 +698,7 @@ struct slot { u8 supported_bus_mode; u8 flag; /* this is for disable slot and polling */ u8 ctlr_index; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct controller *ctrl; struct pci_func *func; u8 irq[4]; @@ -740,7 +740,12 @@ int ibmphp_do_disable_slot(struct slot *slot_cur); int ibmphp_update_slot_info(struct slot *); /* This function is called from HPC, so we need it to not be be static */ int ibmphp_configure_card(struct pci_func *, u8); int ibmphp_unconfigure_card(struct slot **, int); -extern struct hotplug_slot_ops ibmphp_hotplug_slot_ops; +extern const struct hotplug_slot_ops ibmphp_hotplug_slot_ops; + +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); +} #endif //__IBMPHP_H diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c index 4ea57e9019f1..08a58e911fc2 100644 --- a/drivers/pci/hotplug/ibmphp_core.c +++ b/drivers/pci/hotplug/ibmphp_core.c @@ -247,11 +247,8 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) break; } if (rc == 0) { - pslot = hotplug_slot->private; - if (pslot) - rc = ibmphp_hpc_writeslot(pslot, cmd); - else - rc = -ENODEV; + pslot = to_slot(hotplug_slot); + rc = ibmphp_hpc_writeslot(pslot, cmd); } } else rc = -ENODEV; @@ -273,19 +270,15 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) ibmphp_lock_operations(); if (hotplug_slot) { - pslot = hotplug_slot->private; - if (pslot) { - memcpy(&myslot, pslot, sizeof(struct slot)); - rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, - &(myslot.status)); - if (!rc) - rc = ibmphp_hpc_readslot(pslot, - READ_EXTSLOTSTATUS, - &(myslot.ext_status)); - if (!rc) - *value = SLOT_ATTN(myslot.status, - myslot.ext_status); - } + pslot = to_slot(hotplug_slot); + memcpy(&myslot, pslot, sizeof(struct slot)); + rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, + &myslot.status); + if (!rc) + rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS, + &myslot.ext_status); + if (!rc) + *value = SLOT_ATTN(myslot.status, myslot.ext_status); } ibmphp_unlock_operations(); @@ -303,14 +296,12 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { - pslot = hotplug_slot->private; - if (pslot) { - memcpy(&myslot, pslot, sizeof(struct slot)); - rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, - &(myslot.status)); - if (!rc) - *value = SLOT_LATCH(myslot.status); - } + pslot = to_slot(hotplug_slot); + memcpy(&myslot, pslot, sizeof(struct slot)); + rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, + &myslot.status); + if (!rc) + *value = SLOT_LATCH(myslot.status); } ibmphp_unlock_operations(); @@ -330,14 +321,12 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { - pslot = hotplug_slot->private; - if (pslot) { - memcpy(&myslot, pslot, sizeof(struct slot)); - rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, - &(myslot.status)); - if (!rc) - *value = SLOT_PWRGD(myslot.status); - } + pslot = to_slot(hotplug_slot); + memcpy(&myslot, pslot, sizeof(struct slot)); + rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, + &myslot.status); + if (!rc) + *value = SLOT_PWRGD(myslot.status); } ibmphp_unlock_operations(); @@ -357,18 +346,16 @@ static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value) (ulong) hotplug_slot, (ulong) value); ibmphp_lock_operations(); if (hotplug_slot) { - pslot = hotplug_slot->private; - if (pslot) { - memcpy(&myslot, pslot, sizeof(struct slot)); - rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, - &(myslot.status)); - if (!rc) { - present = SLOT_PRESENT(myslot.status); - if (present == HPC_SLOT_EMPTY) - *value = 0; - else - *value = 1; - } + pslot = to_slot(hotplug_slot); + memcpy(&myslot, pslot, sizeof(struct slot)); + rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS, + &myslot.status); + if (!rc) { + present = SLOT_PRESENT(myslot.status); + if (present == HPC_SLOT_EMPTY) + *value = 0; + else + *value = 1; } } @@ -382,7 +369,7 @@ static int get_max_bus_speed(struct slot *slot) int rc = 0; u8 mode = 0; enum pci_bus_speed speed; - struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus; + struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus; debug("%s - Entry slot[%p]\n", __func__, slot); @@ -582,29 +569,10 @@ static int validate(struct slot *slot_cur, int opn) ****************************************************************************/ int ibmphp_update_slot_info(struct slot *slot_cur) { - struct hotplug_slot_info *info; - struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus; - int rc; + struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus; u8 bus_speed; u8 mode; - info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - info->power_status = SLOT_PWRGD(slot_cur->status); - info->attention_status = SLOT_ATTN(slot_cur->status, - slot_cur->ext_status); - info->latch_status = SLOT_LATCH(slot_cur->status); - if (!SLOT_PRESENT(slot_cur->status)) { - info->adapter_status = 0; -/* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */ - } else { - info->adapter_status = 1; -/* get_max_adapter_speed_1(slot_cur->hotplug_slot, - &info->max_adapter_speed_status, 0); */ - } - bus_speed = slot_cur->bus_on->current_speed; mode = slot_cur->bus_on->current_bus_mode; @@ -630,9 +598,7 @@ int ibmphp_update_slot_info(struct slot *slot_cur) bus->cur_bus_speed = bus_speed; // To do: bus_names - rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info); - kfree(info); - return rc; + return 0; } @@ -673,7 +639,7 @@ static void free_slots(void) list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head, ibm_slot_list) { - pci_hp_del(slot_cur->hotplug_slot); + pci_hp_del(&slot_cur->hotplug_slot); slot_cur->ctrl = NULL; slot_cur->bus_on = NULL; @@ -683,9 +649,7 @@ static void free_slots(void) */ ibmphp_unconfigure_card(&slot_cur, -1); - pci_hp_destroy(slot_cur->hotplug_slot); - kfree(slot_cur->hotplug_slot->info); - kfree(slot_cur->hotplug_slot); + pci_hp_destroy(&slot_cur->hotplug_slot); kfree(slot_cur); } debug("%s -- exit\n", __func__); @@ -1007,7 +971,7 @@ static int enable_slot(struct hotplug_slot *hs) ibmphp_lock_operations(); debug("ENABLING SLOT........\n"); - slot_cur = hs->private; + slot_cur = to_slot(hs); rc = validate(slot_cur, ENABLE); if (rc) { @@ -1095,8 +1059,7 @@ static int enable_slot(struct hotplug_slot *hs) slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL); if (!slot_cur->func) { - /* We cannot do update_slot_info here, since no memory for - * kmalloc n.e.ways, and update_slot_info allocates some */ + /* do update_slot_info here? */ rc = -ENOMEM; goto error_power; } @@ -1169,7 +1132,7 @@ error_power: **************************************************************/ static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int rc; ibmphp_lock_operations(); @@ -1259,7 +1222,7 @@ error: goto exit; } -struct hotplug_slot_ops ibmphp_hotplug_slot_ops = { +const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = { .set_attention_status = set_attention_status, .enable_slot = enable_slot, .disable_slot = ibmphp_disable_slot, diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c index 6f8e90e3ec08..11a2661dc062 100644 --- a/drivers/pci/hotplug/ibmphp_ebda.c +++ b/drivers/pci/hotplug/ibmphp_ebda.c @@ -666,36 +666,8 @@ static int fillslotinfo(struct hotplug_slot *hotplug_slot) struct slot *slot; int rc = 0; - if (!hotplug_slot || !hotplug_slot->private) - return -EINVAL; - - slot = hotplug_slot->private; + slot = to_slot(hotplug_slot); rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL); - if (rc) - return rc; - - // power - enabled:1 not:0 - hotplug_slot->info->power_status = SLOT_POWER(slot->status); - - // attention - off:0, on:1, blinking:2 - hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status); - - // latch - open:1 closed:0 - hotplug_slot->info->latch_status = SLOT_LATCH(slot->status); - - // pci board - present:1 not:0 - if (SLOT_PRESENT(slot->status)) - hotplug_slot->info->adapter_status = 1; - else - hotplug_slot->info->adapter_status = 0; -/* - if (slot->bus_on->supported_bus_mode - && (slot->bus_on->supported_speed == BUS_SPEED_66)) - hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX; - else - hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed; -*/ - return rc; } @@ -712,7 +684,6 @@ static int __init ebda_rsrc_controller(void) u8 ctlr_id, temp, bus_index; u16 ctlr, slot, bus; u16 slot_num, bus_num, index; - struct hotplug_slot *hp_slot_ptr; struct controller *hpc_ptr; struct ebda_hpc_bus *bus_ptr; struct ebda_hpc_slot *slot_ptr; @@ -771,7 +742,7 @@ static int __init ebda_rsrc_controller(void) bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL); if (!bus_info_ptr1) { rc = -ENOMEM; - goto error_no_hp_slot; + goto error_no_slot; } bus_info_ptr1->slot_min = slot_ptr->slot_num; bus_info_ptr1->slot_max = slot_ptr->slot_num; @@ -842,7 +813,7 @@ static int __init ebda_rsrc_controller(void) (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1), "ibmphp")) { rc = -ENODEV; - goto error_no_hp_slot; + goto error_no_slot; } hpc_ptr->irq = readb(io_mem + addr + 4); addr += 5; @@ -857,7 +828,7 @@ static int __init ebda_rsrc_controller(void) break; default: rc = -ENODEV; - goto error_no_hp_slot; + goto error_no_slot; } //reorganize chassis' linked list @@ -870,19 +841,6 @@ static int __init ebda_rsrc_controller(void) // register slots with hpc core as well as create linked list of ibm slot for (index = 0; index < hpc_ptr->slot_count; index++) { - - hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL); - if (!hp_slot_ptr) { - rc = -ENOMEM; - goto error_no_hp_slot; - } - - hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); - if (!hp_slot_ptr->info) { - rc = -ENOMEM; - goto error_no_hp_info; - } - tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL); if (!tmp_slot) { rc = -ENOMEM; @@ -909,7 +867,6 @@ static int __init ebda_rsrc_controller(void) bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num); if (!bus_info_ptr1) { - kfree(tmp_slot); rc = -ENODEV; goto error; } @@ -919,22 +876,19 @@ static int __init ebda_rsrc_controller(void) tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index; tmp_slot->number = hpc_ptr->slots[index].slot_num; - tmp_slot->hotplug_slot = hp_slot_ptr; - - hp_slot_ptr->private = tmp_slot; - rc = fillslotinfo(hp_slot_ptr); + rc = fillslotinfo(&tmp_slot->hotplug_slot); if (rc) goto error; - rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private); + rc = ibmphp_init_devno(&tmp_slot); if (rc) goto error; - hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops; + tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops; // end of registering ibm slot with hotplug core - list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head); + list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head); } print_bus_info(); @@ -944,7 +898,7 @@ static int __init ebda_rsrc_controller(void) list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) { snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot)); - pci_hp_register(tmp_slot->hotplug_slot, + pci_hp_register(&tmp_slot->hotplug_slot, pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name); } @@ -953,12 +907,8 @@ static int __init ebda_rsrc_controller(void) return 0; error: - kfree(hp_slot_ptr->private); + kfree(tmp_slot); error_no_slot: - kfree(hp_slot_ptr->info); -error_no_hp_info: - kfree(hp_slot_ptr); -error_no_hp_slot: free_ebda_hpc(hpc_ptr); error_no_hpc: iounmap(io_mem); diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c index 90fde5f106d8..5ac31f683b85 100644 --- a/drivers/pci/hotplug/pci_hotplug_core.c +++ b/drivers/pci/hotplug/pci_hotplug_core.c @@ -49,15 +49,13 @@ static DEFINE_MUTEX(pci_hp_mutex); #define GET_STATUS(name, type) \ static int get_##name(struct hotplug_slot *slot, type *value) \ { \ - struct hotplug_slot_ops *ops = slot->ops; \ + const struct hotplug_slot_ops *ops = slot->ops; \ int retval = 0; \ - if (!try_module_get(ops->owner)) \ + if (!try_module_get(slot->owner)) \ return -ENODEV; \ if (ops->get_##name) \ retval = ops->get_##name(slot, value); \ - else \ - *value = slot->info->name; \ - module_put(ops->owner); \ + module_put(slot->owner); \ return retval; \ } @@ -90,7 +88,7 @@ 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->ops->owner)) { + if (!try_module_get(slot->owner)) { retval = -ENODEV; goto exit; } @@ -109,7 +107,7 @@ 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->ops->owner); + module_put(slot->owner); exit: if (retval) @@ -138,7 +136,8 @@ static ssize_t attention_read_file(struct pci_slot *pci_slot, char *buf) static ssize_t attention_write_file(struct pci_slot *pci_slot, const char *buf, size_t count) { - struct hotplug_slot_ops *ops = pci_slot->hotplug->ops; + struct hotplug_slot *slot = pci_slot->hotplug; + const struct hotplug_slot_ops *ops = slot->ops; unsigned long lattention; u8 attention; int retval = 0; @@ -147,13 +146,13 @@ 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(ops->owner)) { + if (!try_module_get(slot->owner)) { retval = -ENODEV; goto exit; } if (ops->set_attention_status) - retval = ops->set_attention_status(pci_slot->hotplug, attention); - module_put(ops->owner); + retval = ops->set_attention_status(slot, attention); + module_put(slot->owner); exit: if (retval) @@ -213,13 +212,13 @@ 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->ops->owner)) { + 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->ops->owner); + module_put(slot->owner); exit: if (retval) @@ -444,11 +443,11 @@ int __pci_hp_initialize(struct hotplug_slot *slot, struct pci_bus *bus, if (slot == NULL) return -ENODEV; - if ((slot->info == NULL) || (slot->ops == NULL)) + if (slot->ops == NULL) return -EINVAL; - slot->ops->owner = owner; - slot->ops->mod_name = mod_name; + slot->owner = owner; + slot->mod_name = mod_name; /* * No problems if we call this interface from both ACPI_PCI_SLOT @@ -559,28 +558,6 @@ void pci_hp_destroy(struct hotplug_slot *slot) } EXPORT_SYMBOL_GPL(pci_hp_destroy); -/** - * pci_hp_change_slot_info - changes the slot's information structure in the core - * @slot: pointer to the slot whose info has changed - * @info: pointer to the info copy into the slot's info structure - * - * @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. - */ -int pci_hp_change_slot_info(struct hotplug_slot *slot, - struct hotplug_slot_info *info) -{ - if (!slot || !info) - return -ENODEV; - - memcpy(slot->info, info, sizeof(struct hotplug_slot_info)); - - return 0; -} -EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); - static int __init pci_hotplug_init(void) { int result; diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index 811cf83f956d..506e1d923a1f 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -19,7 +19,6 @@ #include <linux/pci.h> #include <linux/pci_hotplug.h> #include <linux/delay.h> -#include <linux/sched/signal.h> /* signal_pending() */ #include <linux/mutex.h> #include <linux/rwsem.h> #include <linux/workqueue.h> @@ -60,71 +59,63 @@ do { \ #define SLOT_NAME_SIZE 10 /** - * struct slot - PCIe hotplug slot - * @state: current state machine position - * @ctrl: pointer to the slot's controller structure - * @hotplug_slot: pointer to the structure registered with the PCI hotplug core - * @work: work item to turn the slot on or off after 5 seconds in response to - * an Attention Button press - * @lock: protects reads and writes of @state; - * protects scheduling, execution and cancellation of @work - */ -struct slot { - u8 state; - struct controller *ctrl; - struct hotplug_slot *hotplug_slot; - struct delayed_work work; - struct mutex lock; -}; - -/** * struct controller - PCIe hotplug controller - * @ctrl_lock: serializes writes to the Slot Control register * @pcie: pointer to the controller's PCIe port service device - * @reset_lock: prevents access to the Data Link Layer Link Active bit in the - * Link Status register and to the Presence Detect State bit in the Slot - * Status register during a slot reset which may cause them to flap - * @slot: pointer to the controller's slot structure - * @queue: wait queue to wake up on reception of a Command Completed event, - * used for synchronous writes to the Slot Control register * @slot_cap: cached copy of the Slot Capabilities register * @slot_ctrl: cached copy of the Slot Control register - * @poll_thread: thread to poll for slot events if no IRQ is available, - * enabled with pciehp_poll_mode module parameter + * @ctrl_lock: serializes writes to the Slot Control register * @cmd_started: jiffies when the Slot Control register was last written; * the next write is allowed 1 second later, absent a Command Completed * interrupt (PCIe r4.0, sec 6.7.3.2) * @cmd_busy: flag set on Slot Control register write, cleared by IRQ handler * on reception of a Command Completed event - * @link_active_reporting: cached copy of Data Link Layer Link Active Reporting - * Capable bit in Link Capabilities register; if this bit is zero, the - * Data Link Layer Link Active bit in the Link Status register will never - * be set and the driver is thus confined to wait 1 second before assuming - * the link to a hotplugged device is up and accessing it + * @queue: wait queue to wake up on reception of a Command Completed event, + * used for synchronous writes to the Slot Control register + * @pending_events: used by the IRQ handler to save events retrieved from the + * Slot Status register for later consumption by the IRQ thread * @notification_enabled: whether the IRQ was requested successfully * @power_fault_detected: whether a power fault was detected by the hardware * that has not yet been cleared by the user - * @pending_events: used by the IRQ handler to save events retrieved from the - * Slot Status register for later consumption by the IRQ thread + * @poll_thread: thread to poll for slot events if no IRQ is available, + * enabled with pciehp_poll_mode module parameter + * @state: current state machine position + * @state_lock: protects reads and writes of @state; + * protects scheduling, execution and cancellation of @button_work + * @button_work: work item to turn the slot on or off after 5 seconds + * in response to an Attention Button press + * @hotplug_slot: structure registered with the PCI hotplug core + * @reset_lock: prevents access to the Data Link Layer Link Active bit in the + * Link Status register and to the Presence Detect State bit in the Slot + * Status register during a slot reset which may cause them to flap * @request_result: result of last user request submitted to the IRQ thread * @requester: wait queue to wake up on completion of user request, * used for synchronous slot enable/disable request via sysfs + * + * PCIe hotplug has a 1:1 relationship between controller and slot, hence + * unlike other drivers, the two aren't represented by separate structures. */ struct controller { - struct mutex ctrl_lock; struct pcie_device *pcie; - struct rw_semaphore reset_lock; - struct slot *slot; - wait_queue_head_t queue; - u32 slot_cap; - u16 slot_ctrl; - struct task_struct *poll_thread; - unsigned long cmd_started; /* jiffies */ + + u32 slot_cap; /* capabilities and quirks */ + + u16 slot_ctrl; /* control register access */ + struct mutex ctrl_lock; + unsigned long cmd_started; unsigned int cmd_busy:1; - unsigned int link_active_reporting:1; + wait_queue_head_t queue; + + atomic_t pending_events; /* event handling */ unsigned int notification_enabled:1; unsigned int power_fault_detected; - atomic_t pending_events; + struct task_struct *poll_thread; + + u8 state; /* state machine */ + struct mutex state_lock; + struct delayed_work button_work; + + struct hotplug_slot hotplug_slot; /* hotplug core interface */ + struct rw_semaphore reset_lock; int request_result; wait_queue_head_t requester; }; @@ -174,42 +165,50 @@ struct controller { #define NO_CMD_CMPL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_NCCS) #define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19) -int pciehp_sysfs_enable_slot(struct slot *slot); -int pciehp_sysfs_disable_slot(struct slot *slot); void pciehp_request(struct controller *ctrl, int action); -void pciehp_handle_button_press(struct slot *slot); -void pciehp_handle_disable_request(struct slot *slot); -void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events); -int pciehp_configure_device(struct slot *p_slot); -void pciehp_unconfigure_device(struct slot *p_slot); +void pciehp_handle_button_press(struct controller *ctrl); +void pciehp_handle_disable_request(struct controller *ctrl); +void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events); +int pciehp_configure_device(struct controller *ctrl); +void pciehp_unconfigure_device(struct controller *ctrl, bool presence); void pciehp_queue_pushbutton_work(struct work_struct *work); struct controller *pcie_init(struct pcie_device *dev); int pcie_init_notification(struct controller *ctrl); void pcie_shutdown_notification(struct controller *ctrl); void pcie_clear_hotplug_events(struct controller *ctrl); -int pciehp_power_on_slot(struct slot *slot); -void pciehp_power_off_slot(struct slot *slot); -void pciehp_get_power_status(struct slot *slot, u8 *status); -void pciehp_get_attention_status(struct slot *slot, u8 *status); - -void pciehp_set_attention_status(struct slot *slot, u8 status); -void pciehp_get_latch_status(struct slot *slot, u8 *status); -void pciehp_get_adapter_status(struct slot *slot, u8 *status); -int pciehp_query_power_fault(struct slot *slot); -void pciehp_green_led_on(struct slot *slot); -void pciehp_green_led_off(struct slot *slot); -void pciehp_green_led_blink(struct slot *slot); +void pcie_enable_interrupt(struct controller *ctrl); +void pcie_disable_interrupt(struct controller *ctrl); +int pciehp_power_on_slot(struct controller *ctrl); +void pciehp_power_off_slot(struct controller *ctrl); +void pciehp_get_power_status(struct controller *ctrl, u8 *status); + +void pciehp_set_attention_status(struct controller *ctrl, u8 status); +void pciehp_get_latch_status(struct controller *ctrl, u8 *status); +int pciehp_query_power_fault(struct controller *ctrl); +void pciehp_green_led_on(struct controller *ctrl); +void pciehp_green_led_off(struct controller *ctrl); +void pciehp_green_led_blink(struct controller *ctrl); +bool pciehp_card_present(struct controller *ctrl); +bool pciehp_card_present_or_link_active(struct controller *ctrl); int pciehp_check_link_status(struct controller *ctrl); bool pciehp_check_link_active(struct controller *ctrl); void pciehp_release_ctrl(struct controller *ctrl); -int pciehp_reset_slot(struct slot *slot, int probe); +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_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); -static inline const char *slot_name(struct slot *slot) +static inline const char *slot_name(struct controller *ctrl) +{ + return hotplug_slot_name(&ctrl->hotplug_slot); +} + +static inline struct controller *to_ctrl(struct hotplug_slot *hotplug_slot) { - return hotplug_slot_name(slot->hotplug_slot); + return container_of(hotplug_slot, struct controller, hotplug_slot); } #endif /* _PCIEHP_H */ diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index ec48c9433ae5..fc5366b50e95 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -23,8 +23,6 @@ #include <linux/types.h> #include <linux/pci.h> #include "pciehp.h" -#include <linux/interrupt.h> -#include <linux/time.h> #include "../pci.h" @@ -47,45 +45,30 @@ MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds"); #define PCIE_MODULE_NAME "pciehp" static int set_attention_status(struct hotplug_slot *slot, u8 value); -static int enable_slot(struct hotplug_slot *slot); -static int disable_slot(struct hotplug_slot *slot); static int get_power_status(struct hotplug_slot *slot, u8 *value); -static int get_attention_status(struct hotplug_slot *slot, u8 *value); static int get_latch_status(struct hotplug_slot *slot, u8 *value); static int get_adapter_status(struct hotplug_slot *slot, u8 *value); -static int reset_slot(struct hotplug_slot *slot, int probe); static int init_slot(struct controller *ctrl) { - struct slot *slot = ctrl->slot; - struct hotplug_slot *hotplug = NULL; - struct hotplug_slot_info *info = NULL; - struct hotplug_slot_ops *ops = NULL; + struct hotplug_slot_ops *ops; char name[SLOT_NAME_SIZE]; - int retval = -ENOMEM; - - hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL); - if (!hotplug) - goto out; - - info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) - goto out; + int retval; /* Setup hotplug slot ops */ ops = kzalloc(sizeof(*ops), GFP_KERNEL); if (!ops) - goto out; + return -ENOMEM; - ops->enable_slot = enable_slot; - ops->disable_slot = disable_slot; + ops->enable_slot = pciehp_sysfs_enable_slot; + ops->disable_slot = pciehp_sysfs_disable_slot; ops->get_power_status = get_power_status; ops->get_adapter_status = get_adapter_status; - ops->reset_slot = reset_slot; + ops->reset_slot = pciehp_reset_slot; if (MRL_SENS(ctrl)) ops->get_latch_status = get_latch_status; if (ATTN_LED(ctrl)) { - ops->get_attention_status = get_attention_status; + ops->get_attention_status = pciehp_get_attention_status; ops->set_attention_status = set_attention_status; } else if (ctrl->pcie->port->hotplug_user_indicators) { ops->get_attention_status = pciehp_get_raw_indicator_status; @@ -93,33 +76,24 @@ static int init_slot(struct controller *ctrl) } /* register this slot with the hotplug pci core */ - hotplug->info = info; - hotplug->private = slot; - hotplug->ops = ops; - slot->hotplug_slot = hotplug; + ctrl->hotplug_slot.ops = ops; snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl)); - retval = pci_hp_initialize(hotplug, + retval = pci_hp_initialize(&ctrl->hotplug_slot, ctrl->pcie->port->subordinate, 0, name); - if (retval) - ctrl_err(ctrl, "pci_hp_initialize failed: error %d\n", retval); -out: if (retval) { + ctrl_err(ctrl, "pci_hp_initialize failed: error %d\n", retval); kfree(ops); - kfree(info); - kfree(hotplug); } return retval; } static void cleanup_slot(struct controller *ctrl) { - struct hotplug_slot *hotplug_slot = ctrl->slot->hotplug_slot; + struct hotplug_slot *hotplug_slot = &ctrl->hotplug_slot; pci_hp_destroy(hotplug_slot); kfree(hotplug_slot->ops); - kfree(hotplug_slot->info); - kfree(hotplug_slot); } /* @@ -127,79 +101,48 @@ static void cleanup_slot(struct controller *ctrl) */ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = to_ctrl(hotplug_slot); + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_set_attention_status(slot, status); + pciehp_set_attention_status(ctrl, status); pci_config_pm_runtime_put(pdev); return 0; } - -static int enable_slot(struct hotplug_slot *hotplug_slot) -{ - struct slot *slot = hotplug_slot->private; - - return pciehp_sysfs_enable_slot(slot); -} - - -static int disable_slot(struct hotplug_slot *hotplug_slot) -{ - struct slot *slot = hotplug_slot->private; - - return pciehp_sysfs_disable_slot(slot); -} - static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = to_ctrl(hotplug_slot); + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_get_power_status(slot, value); + pciehp_get_power_status(ctrl, value); pci_config_pm_runtime_put(pdev); return 0; } -static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) -{ - struct slot *slot = hotplug_slot->private; - - pciehp_get_attention_status(slot, value); - return 0; -} - static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = to_ctrl(hotplug_slot); + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_get_latch_status(slot, value); + pciehp_get_latch_status(ctrl, value); pci_config_pm_runtime_put(pdev); return 0; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = to_ctrl(hotplug_slot); + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_get_adapter_status(slot, value); + *value = pciehp_card_present_or_link_active(ctrl); pci_config_pm_runtime_put(pdev); return 0; } -static int reset_slot(struct hotplug_slot *hotplug_slot, int probe) -{ - struct slot *slot = hotplug_slot->private; - - return pciehp_reset_slot(slot, probe); -} - /** * pciehp_check_presence() - synthesize event if presence has changed * @@ -212,20 +155,19 @@ static int reset_slot(struct hotplug_slot *hotplug_slot, int probe) */ static void pciehp_check_presence(struct controller *ctrl) { - struct slot *slot = ctrl->slot; - u8 occupied; + bool occupied; down_read(&ctrl->reset_lock); - mutex_lock(&slot->lock); + mutex_lock(&ctrl->state_lock); - pciehp_get_adapter_status(slot, &occupied); - if ((occupied && (slot->state == OFF_STATE || - slot->state == BLINKINGON_STATE)) || - (!occupied && (slot->state == ON_STATE || - slot->state == BLINKINGOFF_STATE))) + occupied = pciehp_card_present_or_link_active(ctrl); + if ((occupied && (ctrl->state == OFF_STATE || + ctrl->state == BLINKINGON_STATE)) || + (!occupied && (ctrl->state == ON_STATE || + ctrl->state == BLINKINGOFF_STATE))) pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC); - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->state_lock); up_read(&ctrl->reset_lock); } @@ -233,7 +175,6 @@ static int pciehp_probe(struct pcie_device *dev) { int rc; struct controller *ctrl; - struct slot *slot; /* If this is not a "hotplug" service, we have no business here. */ if (dev->service != PCIE_PORT_SERVICE_HP) @@ -271,8 +212,7 @@ static int pciehp_probe(struct pcie_device *dev) } /* Publish to user space */ - slot = ctrl->slot; - rc = pci_hp_add(slot->hotplug_slot); + rc = pci_hp_add(&ctrl->hotplug_slot); if (rc) { ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc); goto err_out_shutdown_notification; @@ -295,29 +235,43 @@ static void pciehp_remove(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); - pci_hp_del(ctrl->slot->hotplug_slot); + pci_hp_del(&ctrl->hotplug_slot); pcie_shutdown_notification(ctrl); cleanup_slot(ctrl); pciehp_release_ctrl(ctrl); } #ifdef CONFIG_PM +static bool pme_is_native(struct pcie_device *dev) +{ + const struct pci_host_bridge *host; + + host = pci_find_host_bridge(dev->port->bus); + return pcie_ports_native || host->native_pme; +} + static int pciehp_suspend(struct pcie_device *dev) { + /* + * Disable hotplug interrupt so that it does not trigger + * immediately when the downstream link goes down. + */ + if (pme_is_native(dev)) + pcie_disable_interrupt(get_service_data(dev)); + return 0; } static int pciehp_resume_noirq(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); - struct slot *slot = ctrl->slot; /* pci_restore_state() just wrote to the Slot Control register */ ctrl->cmd_started = jiffies; ctrl->cmd_busy = true; /* clear spurious events from rediscovery of inserted card */ - if (slot->state == ON_STATE || slot->state == BLINKINGOFF_STATE) + if (ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) pcie_clear_hotplug_events(ctrl); return 0; @@ -327,10 +281,29 @@ static int pciehp_resume(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); + if (pme_is_native(dev)) + pcie_enable_interrupt(ctrl); + pciehp_check_presence(ctrl); return 0; } + +static int pciehp_runtime_resume(struct pcie_device *dev) +{ + struct controller *ctrl = get_service_data(dev); + + /* pci_restore_state() just wrote to the Slot Control register */ + ctrl->cmd_started = jiffies; + ctrl->cmd_busy = true; + + /* clear spurious events from rediscovery of inserted card */ + if ((ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) && + pme_is_native(dev)) + pcie_clear_hotplug_events(ctrl); + + return pciehp_resume(dev); +} #endif /* PM */ static struct pcie_port_service_driver hpdriver_portdrv = { @@ -345,10 +318,12 @@ static struct pcie_port_service_driver hpdriver_portdrv = { .suspend = pciehp_suspend, .resume_noirq = pciehp_resume_noirq, .resume = pciehp_resume, + .runtime_suspend = pciehp_suspend, + .runtime_resume = pciehp_runtime_resume, #endif /* PM */ }; -static int __init pcied_init(void) +int __init pcie_hp_init(void) { int retval = 0; @@ -359,4 +334,3 @@ static int __init pcied_init(void) return retval; } -device_initcall(pcied_init); diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index da7c72372ffc..3f3df4c29f6e 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -13,24 +13,24 @@ * */ -#include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> -#include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/pci.h> -#include "../pci.h" #include "pciehp.h" /* The following routines constitute the bulk of the hotplug controller logic */ -static void set_slot_off(struct controller *ctrl, struct slot *pslot) +#define SAFE_REMOVAL true +#define SURPRISE_REMOVAL false + +static void set_slot_off(struct controller *ctrl) { /* turn off slot, turn on Amber LED, turn off Green LED if supported*/ if (POWER_CTRL(ctrl)) { - pciehp_power_off_slot(pslot); + pciehp_power_off_slot(ctrl); /* * After turning power off, we must wait for at least 1 second @@ -40,31 +40,30 @@ static void set_slot_off(struct controller *ctrl, struct slot *pslot) msleep(1000); } - pciehp_green_led_off(pslot); - pciehp_set_attention_status(pslot, 1); + pciehp_green_led_off(ctrl); + pciehp_set_attention_status(ctrl, 1); } /** * board_added - Called after a board has been added to the system. - * @p_slot: &slot where board is added + * @ctrl: PCIe hotplug controller where board is added * * Turns power on for the board. * Configures board. */ -static int board_added(struct slot *p_slot) +static int board_added(struct controller *ctrl) { int retval = 0; - struct controller *ctrl = p_slot->ctrl; struct pci_bus *parent = ctrl->pcie->port->subordinate; if (POWER_CTRL(ctrl)) { /* Power on slot */ - retval = pciehp_power_on_slot(p_slot); + retval = pciehp_power_on_slot(ctrl); if (retval) return retval; } - pciehp_green_led_blink(p_slot); + pciehp_green_led_blink(ctrl); /* Check link training status */ retval = pciehp_check_link_status(ctrl); @@ -74,13 +73,13 @@ static int board_added(struct slot *p_slot) } /* Check for a power fault */ - if (ctrl->power_fault_detected || pciehp_query_power_fault(p_slot)) { - ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(p_slot)); + if (ctrl->power_fault_detected || pciehp_query_power_fault(ctrl)) { + ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl)); retval = -EIO; goto err_exit; } - retval = pciehp_configure_device(p_slot); + retval = pciehp_configure_device(ctrl); if (retval) { if (retval != -EEXIST) { ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n", @@ -89,27 +88,26 @@ static int board_added(struct slot *p_slot) } } - pciehp_green_led_on(p_slot); - pciehp_set_attention_status(p_slot, 0); + pciehp_green_led_on(ctrl); + pciehp_set_attention_status(ctrl, 0); return 0; err_exit: - set_slot_off(ctrl, p_slot); + set_slot_off(ctrl); return retval; } /** * remove_board - Turns off slot and LEDs - * @p_slot: slot where board is being removed + * @ctrl: PCIe hotplug controller where board is being removed + * @safe_removal: whether the board is safely removed (versus surprise removed) */ -static void remove_board(struct slot *p_slot) +static void remove_board(struct controller *ctrl, bool safe_removal) { - struct controller *ctrl = p_slot->ctrl; - - pciehp_unconfigure_device(p_slot); + pciehp_unconfigure_device(ctrl, safe_removal); if (POWER_CTRL(ctrl)) { - pciehp_power_off_slot(p_slot); + pciehp_power_off_slot(ctrl); /* * After turning power off, we must wait for at least 1 second @@ -120,11 +118,11 @@ static void remove_board(struct slot *p_slot) } /* turn off Green LED */ - pciehp_green_led_off(p_slot); + pciehp_green_led_off(ctrl); } -static int pciehp_enable_slot(struct slot *slot); -static int pciehp_disable_slot(struct slot *slot); +static int pciehp_enable_slot(struct controller *ctrl); +static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal); void pciehp_request(struct controller *ctrl, int action) { @@ -135,11 +133,11 @@ void pciehp_request(struct controller *ctrl, int action) void pciehp_queue_pushbutton_work(struct work_struct *work) { - struct slot *p_slot = container_of(work, struct slot, work.work); - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = container_of(work, struct controller, + button_work.work); - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: pciehp_request(ctrl, DISABLE_SLOT); break; @@ -149,30 +147,28 @@ void pciehp_queue_pushbutton_work(struct work_struct *work) default: break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); } -void pciehp_handle_button_press(struct slot *p_slot) +void pciehp_handle_button_press(struct controller *ctrl) { - struct controller *ctrl = p_slot->ctrl; - - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case OFF_STATE: case ON_STATE: - if (p_slot->state == ON_STATE) { - p_slot->state = BLINKINGOFF_STATE; + if (ctrl->state == ON_STATE) { + ctrl->state = BLINKINGOFF_STATE; ctrl_info(ctrl, "Slot(%s): Powering off due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); } else { - p_slot->state = BLINKINGON_STATE; + ctrl->state = BLINKINGON_STATE; ctrl_info(ctrl, "Slot(%s) Powering on due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); } /* blink green LED and turn off amber */ - pciehp_green_led_blink(p_slot); - pciehp_set_attention_status(p_slot, 0); - schedule_delayed_work(&p_slot->work, 5 * HZ); + pciehp_green_led_blink(ctrl); + pciehp_set_attention_status(ctrl, 0); + schedule_delayed_work(&ctrl->button_work, 5 * HZ); break; case BLINKINGOFF_STATE: case BLINKINGON_STATE: @@ -181,197 +177,184 @@ void pciehp_handle_button_press(struct slot *p_slot) * press the attention again before the 5 sec. limit * expires to cancel hot-add or hot-remove */ - ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(p_slot)); - cancel_delayed_work(&p_slot->work); - if (p_slot->state == BLINKINGOFF_STATE) { - p_slot->state = ON_STATE; - pciehp_green_led_on(p_slot); + ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(ctrl)); + cancel_delayed_work(&ctrl->button_work); + if (ctrl->state == BLINKINGOFF_STATE) { + ctrl->state = ON_STATE; + pciehp_green_led_on(ctrl); } else { - p_slot->state = OFF_STATE; - pciehp_green_led_off(p_slot); + ctrl->state = OFF_STATE; + pciehp_green_led_off(ctrl); } - pciehp_set_attention_status(p_slot, 0); + pciehp_set_attention_status(ctrl, 0); ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Ignoring invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); } -void pciehp_handle_disable_request(struct slot *slot) +void pciehp_handle_disable_request(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - - mutex_lock(&slot->lock); - switch (slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case BLINKINGON_STATE: case BLINKINGOFF_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->button_work); break; } - slot->state = POWEROFF_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWEROFF_STATE; + mutex_unlock(&ctrl->state_lock); - ctrl->request_result = pciehp_disable_slot(slot); + ctrl->request_result = pciehp_disable_slot(ctrl, SAFE_REMOVAL); } -void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events) +void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events) { - struct controller *ctrl = slot->ctrl; - bool link_active; - u8 present; + bool present, link_active; /* * If the slot is on and presence or link has changed, turn it off. * Even if it's occupied again, we cannot assume the card is the same. */ - mutex_lock(&slot->lock); - switch (slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->button_work); /* fall through */ case ON_STATE: - slot->state = POWEROFF_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWEROFF_STATE; + mutex_unlock(&ctrl->state_lock); if (events & PCI_EXP_SLTSTA_DLLSC) ctrl_info(ctrl, "Slot(%s): Link Down\n", - slot_name(slot)); + slot_name(ctrl)); if (events & PCI_EXP_SLTSTA_PDC) ctrl_info(ctrl, "Slot(%s): Card not present\n", - slot_name(slot)); - pciehp_disable_slot(slot); + slot_name(ctrl)); + pciehp_disable_slot(ctrl, SURPRISE_REMOVAL); break; default: - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->state_lock); break; } /* Turn the slot on if it's occupied or link is up */ - mutex_lock(&slot->lock); - pciehp_get_adapter_status(slot, &present); + mutex_lock(&ctrl->state_lock); + present = pciehp_card_present(ctrl); link_active = pciehp_check_link_active(ctrl); if (!present && !link_active) { - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->state_lock); return; } - switch (slot->state) { + switch (ctrl->state) { case BLINKINGON_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->button_work); /* fall through */ case OFF_STATE: - slot->state = POWERON_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWERON_STATE; + mutex_unlock(&ctrl->state_lock); if (present) ctrl_info(ctrl, "Slot(%s): Card present\n", - slot_name(slot)); + slot_name(ctrl)); if (link_active) ctrl_info(ctrl, "Slot(%s): Link Up\n", - slot_name(slot)); - ctrl->request_result = pciehp_enable_slot(slot); + slot_name(ctrl)); + ctrl->request_result = pciehp_enable_slot(ctrl); break; default: - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->state_lock); break; } } -static int __pciehp_enable_slot(struct slot *p_slot) +static int __pciehp_enable_slot(struct controller *ctrl) { u8 getstatus = 0; - struct controller *ctrl = p_slot->ctrl; - pciehp_get_adapter_status(p_slot, &getstatus); - if (!getstatus) { - ctrl_info(ctrl, "Slot(%s): No adapter\n", slot_name(p_slot)); - return -ENODEV; - } - if (MRL_SENS(p_slot->ctrl)) { - pciehp_get_latch_status(p_slot, &getstatus); + if (MRL_SENS(ctrl)) { + pciehp_get_latch_status(ctrl, &getstatus); if (getstatus) { ctrl_info(ctrl, "Slot(%s): Latch open\n", - slot_name(p_slot)); + slot_name(ctrl)); return -ENODEV; } } - if (POWER_CTRL(p_slot->ctrl)) { - pciehp_get_power_status(p_slot, &getstatus); + if (POWER_CTRL(ctrl)) { + pciehp_get_power_status(ctrl, &getstatus); if (getstatus) { ctrl_info(ctrl, "Slot(%s): Already enabled\n", - slot_name(p_slot)); + slot_name(ctrl)); return 0; } } - return board_added(p_slot); + return board_added(ctrl); } -static int pciehp_enable_slot(struct slot *slot) +static int pciehp_enable_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; int ret; pm_runtime_get_sync(&ctrl->pcie->port->dev); - ret = __pciehp_enable_slot(slot); + ret = __pciehp_enable_slot(ctrl); if (ret && ATTN_BUTTN(ctrl)) - pciehp_green_led_off(slot); /* may be blinking */ + pciehp_green_led_off(ctrl); /* may be blinking */ pm_runtime_put(&ctrl->pcie->port->dev); - mutex_lock(&slot->lock); - slot->state = ret ? OFF_STATE : ON_STATE; - mutex_unlock(&slot->lock); + mutex_lock(&ctrl->state_lock); + ctrl->state = ret ? OFF_STATE : ON_STATE; + mutex_unlock(&ctrl->state_lock); return ret; } -static int __pciehp_disable_slot(struct slot *p_slot) +static int __pciehp_disable_slot(struct controller *ctrl, bool safe_removal) { u8 getstatus = 0; - struct controller *ctrl = p_slot->ctrl; - if (POWER_CTRL(p_slot->ctrl)) { - pciehp_get_power_status(p_slot, &getstatus); + if (POWER_CTRL(ctrl)) { + pciehp_get_power_status(ctrl, &getstatus); if (!getstatus) { ctrl_info(ctrl, "Slot(%s): Already disabled\n", - slot_name(p_slot)); + slot_name(ctrl)); return -EINVAL; } } - remove_board(p_slot); + remove_board(ctrl, safe_removal); return 0; } -static int pciehp_disable_slot(struct slot *slot) +static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal) { - struct controller *ctrl = slot->ctrl; int ret; pm_runtime_get_sync(&ctrl->pcie->port->dev); - ret = __pciehp_disable_slot(slot); + ret = __pciehp_disable_slot(ctrl, safe_removal); pm_runtime_put(&ctrl->pcie->port->dev); - mutex_lock(&slot->lock); - slot->state = OFF_STATE; - mutex_unlock(&slot->lock); + mutex_lock(&ctrl->state_lock); + ctrl->state = OFF_STATE; + mutex_unlock(&ctrl->state_lock); return ret; } -int pciehp_sysfs_enable_slot(struct slot *p_slot) +int pciehp_sysfs_enable_slot(struct hotplug_slot *hotplug_slot) { - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = to_ctrl(hotplug_slot); - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case BLINKINGON_STATE: case OFF_STATE: - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); /* * The IRQ thread becomes a no-op if the user pulls out the * card before the thread wakes up, so initialize to -ENODEV. @@ -383,53 +366,53 @@ int pciehp_sysfs_enable_slot(struct slot *p_slot) return ctrl->request_result; case POWERON_STATE: ctrl_info(ctrl, "Slot(%s): Already in powering on state\n", - slot_name(p_slot)); + slot_name(ctrl)); break; case BLINKINGOFF_STATE: case ON_STATE: case POWEROFF_STATE: ctrl_info(ctrl, "Slot(%s): Already enabled\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); return -ENODEV; } -int pciehp_sysfs_disable_slot(struct slot *p_slot) +int pciehp_sysfs_disable_slot(struct hotplug_slot *hotplug_slot) { - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = to_ctrl(hotplug_slot); - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->state_lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: case ON_STATE: - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); pciehp_request(ctrl, DISABLE_SLOT); wait_event(ctrl->requester, !atomic_read(&ctrl->pending_events)); return ctrl->request_result; case POWEROFF_STATE: ctrl_info(ctrl, "Slot(%s): Already in powering off state\n", - slot_name(p_slot)); + slot_name(ctrl)); break; case BLINKINGON_STATE: case OFF_STATE: case POWERON_STATE: ctrl_info(ctrl, "Slot(%s): Already disabled\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->state_lock); return -ENODEV; } diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index a938abdb41ce..7dd443aea5a5 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -13,15 +13,12 @@ */ #include <linux/kernel.h> -#include <linux/module.h> #include <linux/types.h> -#include <linux/signal.h> #include <linux/jiffies.h> #include <linux/kthread.h> #include <linux/pci.h> #include <linux/pm_runtime.h> #include <linux/interrupt.h> -#include <linux/time.h> #include <linux/slab.h> #include "../pci.h" @@ -43,7 +40,7 @@ static inline int pciehp_request_irq(struct controller *ctrl) if (pciehp_poll_mode) { ctrl->poll_thread = kthread_run(&pciehp_poll, ctrl, "pciehp_poll-%s", - slot_name(ctrl->slot)); + slot_name(ctrl)); return PTR_ERR_OR_ZERO(ctrl->poll_thread); } @@ -217,13 +214,6 @@ bool pciehp_check_link_active(struct controller *ctrl) return ret; } -static void pcie_wait_link_active(struct controller *ctrl) -{ - struct pci_dev *pdev = ctrl_dev(ctrl); - - pcie_wait_for_link(pdev, true); -} - static bool pci_bus_check_dev(struct pci_bus *bus, int devfn) { u32 l; @@ -256,18 +246,9 @@ int pciehp_check_link_status(struct controller *ctrl) bool found; u16 lnk_status; - /* - * Data Link Layer Link Active Reporting must be capable for - * hot-plug capable downstream port. But old controller might - * not implement it. In this case, we wait for 1000 ms. - */ - if (ctrl->link_active_reporting) - pcie_wait_link_active(ctrl); - else - msleep(1000); + if (!pcie_wait_for_link(pdev, true)) + return -1; - /* wait 100ms before read pci conf, and try in 1s */ - msleep(100); found = pci_bus_check_dev(ctrl->pcie->port->subordinate, PCI_DEVFN(0, 0)); @@ -318,8 +299,8 @@ static int pciehp_link_enable(struct controller *ctrl) int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot, u8 *status) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct controller *ctrl = to_ctrl(hotplug_slot); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; pci_config_pm_runtime_get(pdev); @@ -329,9 +310,9 @@ int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot, return 0; } -void pciehp_get_attention_status(struct slot *slot, u8 *status) +int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status) { - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = to_ctrl(hotplug_slot); struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; @@ -355,11 +336,12 @@ void pciehp_get_attention_status(struct slot *slot, u8 *status) *status = 0xFF; break; } + + return 0; } -void pciehp_get_power_status(struct slot *slot, u8 *status) +void pciehp_get_power_status(struct controller *ctrl, u8 *status) { - struct controller *ctrl = slot->ctrl; struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; @@ -380,27 +362,41 @@ void pciehp_get_power_status(struct slot *slot, u8 *status) } } -void pciehp_get_latch_status(struct slot *slot, u8 *status) +void pciehp_get_latch_status(struct controller *ctrl, u8 *status) { - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status); *status = !!(slot_status & PCI_EXP_SLTSTA_MRLSS); } -void pciehp_get_adapter_status(struct slot *slot, u8 *status) +bool pciehp_card_present(struct controller *ctrl) { - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status); - *status = !!(slot_status & PCI_EXP_SLTSTA_PDS); + return slot_status & PCI_EXP_SLTSTA_PDS; } -int pciehp_query_power_fault(struct slot *slot) +/** + * pciehp_card_present_or_link_active() - whether given slot is occupied + * @ctrl: PCIe hotplug controller + * + * Unlike pciehp_card_present(), which determines presence solely from the + * Presence Detect State bit, this helper also returns true if the Link Active + * bit is set. This is a concession to broken hotplug ports which hardwire + * Presence Detect State to zero, such as Wilocity's [1ae9:0200]. + */ +bool pciehp_card_present_or_link_active(struct controller *ctrl) +{ + return pciehp_card_present(ctrl) || pciehp_check_link_active(ctrl); +} + +int pciehp_query_power_fault(struct controller *ctrl) { - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status); @@ -410,8 +406,7 @@ int pciehp_query_power_fault(struct slot *slot) int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot, u8 status) { - struct slot *slot = hotplug_slot->private; - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = to_ctrl(hotplug_slot); struct pci_dev *pdev = ctrl_dev(ctrl); pci_config_pm_runtime_get(pdev); @@ -421,9 +416,8 @@ int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot, return 0; } -void pciehp_set_attention_status(struct slot *slot, u8 value) +void pciehp_set_attention_status(struct controller *ctrl, u8 value) { - struct controller *ctrl = slot->ctrl; u16 slot_cmd; if (!ATTN_LED(ctrl)) @@ -447,10 +441,8 @@ void pciehp_set_attention_status(struct slot *slot, u8 value) pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd); } -void pciehp_green_led_on(struct slot *slot) +void pciehp_green_led_on(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -461,10 +453,8 @@ void pciehp_green_led_on(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_ON); } -void pciehp_green_led_off(struct slot *slot) +void pciehp_green_led_off(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -475,10 +465,8 @@ void pciehp_green_led_off(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_OFF); } -void pciehp_green_led_blink(struct slot *slot) +void pciehp_green_led_blink(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -489,9 +477,8 @@ void pciehp_green_led_blink(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_BLINK); } -int pciehp_power_on_slot(struct slot *slot) +int pciehp_power_on_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; int retval; @@ -515,10 +502,8 @@ int pciehp_power_on_slot(struct slot *slot) return retval; } -void pciehp_power_off_slot(struct slot *slot) +void pciehp_power_off_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_OFF, PCI_EXP_SLTCTL_PCC); ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, @@ -533,9 +518,11 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id) u16 status, events; /* - * Interrupts only occur in D3hot or shallower (PCIe r4.0, sec 6.7.3.4). + * Interrupts only occur in D3hot or shallower and only if enabled + * in the Slot Control register (PCIe r4.0, sec 6.7.3.4). */ - if (pdev->current_state == PCI_D3cold) + if (pdev->current_state == PCI_D3cold || + (!(ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE) && !pciehp_poll_mode)) return IRQ_NONE; /* @@ -616,7 +603,6 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) { struct controller *ctrl = (struct controller *)dev_id; struct pci_dev *pdev = ctrl_dev(ctrl); - struct slot *slot = ctrl->slot; irqreturn_t ret; u32 events; @@ -642,16 +628,16 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) /* Check Attention Button Pressed */ if (events & PCI_EXP_SLTSTA_ABP) { ctrl_info(ctrl, "Slot(%s): Attention button pressed\n", - slot_name(slot)); - pciehp_handle_button_press(slot); + slot_name(ctrl)); + pciehp_handle_button_press(ctrl); } /* Check Power Fault Detected */ if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) { ctrl->power_fault_detected = 1; - ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(slot)); - pciehp_set_attention_status(slot, 1); - pciehp_green_led_off(slot); + ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl)); + pciehp_set_attention_status(ctrl, 1); + pciehp_green_led_off(ctrl); } /* @@ -660,9 +646,9 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) */ down_read(&ctrl->reset_lock); if (events & DISABLE_SLOT) - pciehp_handle_disable_request(slot); + pciehp_handle_disable_request(ctrl); else if (events & (PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC)) - pciehp_handle_presence_or_link_change(slot, events); + pciehp_handle_presence_or_link_change(ctrl, events); up_read(&ctrl->reset_lock); pci_config_pm_runtime_put(pdev); @@ -748,6 +734,16 @@ void pcie_clear_hotplug_events(struct controller *ctrl) PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC); } +void pcie_enable_interrupt(struct controller *ctrl) +{ + pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_HPIE, PCI_EXP_SLTCTL_HPIE); +} + +void pcie_disable_interrupt(struct controller *ctrl) +{ + pcie_write_cmd(ctrl, 0, PCI_EXP_SLTCTL_HPIE); +} + /* * pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary * bus reset of the bridge, but at the same time we want to ensure that it is @@ -756,9 +752,9 @@ void pcie_clear_hotplug_events(struct controller *ctrl) * momentarily, if we see that they could interfere. Also, clear any spurious * events after. */ -int pciehp_reset_slot(struct slot *slot, int probe) +int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, int probe) { - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = to_ctrl(hotplug_slot); struct pci_dev *pdev = ctrl_dev(ctrl); u16 stat_mask = 0, ctrl_mask = 0; int rc; @@ -808,34 +804,6 @@ void pcie_shutdown_notification(struct controller *ctrl) } } -static int pcie_init_slot(struct controller *ctrl) -{ - struct pci_bus *subordinate = ctrl_dev(ctrl)->subordinate; - struct slot *slot; - - slot = kzalloc(sizeof(*slot), GFP_KERNEL); - if (!slot) - return -ENOMEM; - - down_read(&pci_bus_sem); - slot->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE; - up_read(&pci_bus_sem); - - slot->ctrl = ctrl; - mutex_init(&slot->lock); - INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work); - ctrl->slot = slot; - return 0; -} - -static void pcie_cleanup_slot(struct controller *ctrl) -{ - struct slot *slot = ctrl->slot; - - cancel_delayed_work_sync(&slot->work); - kfree(slot); -} - static inline void dbg_ctrl(struct controller *ctrl) { struct pci_dev *pdev = ctrl->pcie->port; @@ -857,12 +825,13 @@ struct controller *pcie_init(struct pcie_device *dev) { struct controller *ctrl; u32 slot_cap, link_cap; - u8 occupied, poweron; + u8 poweron; struct pci_dev *pdev = dev->port; + struct pci_bus *subordinate = pdev->subordinate; ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); if (!ctrl) - goto abort; + return NULL; ctrl->pcie = dev; pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &slot_cap); @@ -879,15 +848,19 @@ struct controller *pcie_init(struct pcie_device *dev) ctrl->slot_cap = slot_cap; mutex_init(&ctrl->ctrl_lock); + mutex_init(&ctrl->state_lock); init_rwsem(&ctrl->reset_lock); init_waitqueue_head(&ctrl->requester); init_waitqueue_head(&ctrl->queue); + INIT_DELAYED_WORK(&ctrl->button_work, pciehp_queue_pushbutton_work); dbg_ctrl(ctrl); + down_read(&pci_bus_sem); + ctrl->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE; + up_read(&pci_bus_sem); + /* Check if Data Link Layer Link Active Reporting is implemented */ pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap); - if (link_cap & PCI_EXP_LNKCAP_DLLLARC) - ctrl->link_active_reporting = 1; /* Clear all remaining event bits in Slot Status register. */ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, @@ -909,33 +882,24 @@ struct controller *pcie_init(struct pcie_device *dev) FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC), pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : ""); - if (pcie_init_slot(ctrl)) - goto abort_ctrl; - /* * If empty slot's power status is on, turn power off. The IRQ isn't * requested yet, so avoid triggering a notification with this command. */ if (POWER_CTRL(ctrl)) { - pciehp_get_adapter_status(ctrl->slot, &occupied); - pciehp_get_power_status(ctrl->slot, &poweron); - if (!occupied && poweron) { + pciehp_get_power_status(ctrl, &poweron); + if (!pciehp_card_present_or_link_active(ctrl) && poweron) { pcie_disable_notification(ctrl); - pciehp_power_off_slot(ctrl->slot); + pciehp_power_off_slot(ctrl); } } return ctrl; - -abort_ctrl: - kfree(ctrl); -abort: - return NULL; } void pciehp_release_ctrl(struct controller *ctrl) { - pcie_cleanup_slot(ctrl); + cancel_delayed_work_sync(&ctrl->button_work); kfree(ctrl); } diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c index 5c58c22e0c08..b9c1396db6fe 100644 --- a/drivers/pci/hotplug/pciehp_pci.c +++ b/drivers/pci/hotplug/pciehp_pci.c @@ -13,20 +13,26 @@ * */ -#include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> #include "../pci.h" #include "pciehp.h" -int pciehp_configure_device(struct slot *p_slot) +/** + * pciehp_configure_device() - enumerate PCI devices below a hotplug bridge + * @ctrl: PCIe hotplug controller + * + * Enumerate PCI devices below a hotplug bridge and add them to the system. + * Return 0 on success, %-EEXIST if the devices are already enumerated or + * %-ENODEV if enumeration failed. + */ +int pciehp_configure_device(struct controller *ctrl) { struct pci_dev *dev; - struct pci_dev *bridge = p_slot->ctrl->pcie->port; + struct pci_dev *bridge = ctrl->pcie->port; struct pci_bus *parent = bridge->subordinate; int num, ret = 0; - struct controller *ctrl = p_slot->ctrl; pci_lock_rescan_remove(); @@ -62,17 +68,28 @@ int pciehp_configure_device(struct slot *p_slot) return ret; } -void pciehp_unconfigure_device(struct slot *p_slot) +/** + * pciehp_unconfigure_device() - remove PCI devices below a hotplug bridge + * @ctrl: PCIe hotplug controller + * @presence: whether the card is still present in the slot; + * true for safe removal via sysfs or an Attention Button press, + * false for surprise removal + * + * Unbind PCI devices below a hotplug bridge from their drivers and remove + * them from the system. Safely removed devices are quiesced. Surprise + * removed devices are marked as such to prevent further accesses. + */ +void pciehp_unconfigure_device(struct controller *ctrl, bool presence) { - u8 presence = 0; struct pci_dev *dev, *temp; - struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate; + struct pci_bus *parent = ctrl->pcie->port->subordinate; u16 command; - struct controller *ctrl = p_slot->ctrl; ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n", __func__, pci_domain_nr(parent), parent->number); - pciehp_get_adapter_status(p_slot, &presence); + + if (!presence) + pci_walk_bus(parent, pci_dev_set_disconnected, NULL); pci_lock_rescan_remove(); @@ -85,12 +102,6 @@ void pciehp_unconfigure_device(struct slot *p_slot) list_for_each_entry_safe_reverse(dev, temp, &parent->devices, bus_list) { pci_dev_get(dev); - if (!presence) { - pci_dev_set_disconnected(dev, NULL); - if (pci_has_subordinate(dev)) - pci_walk_bus(dev->subordinate, - pci_dev_set_disconnected, NULL); - } pci_stop_and_remove_bus_device(dev); /* * Ensure that no new Requests will be generated from diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c index 3276a5e4c430..ee54f5bacad1 100644 --- a/drivers/pci/hotplug/pnv_php.c +++ b/drivers/pci/hotplug/pnv_php.c @@ -275,14 +275,13 @@ static int pnv_php_add_devtree(struct pnv_php_slot *php_slot) goto free_fdt1; } - fdt = kzalloc(fdt_totalsize(fdt1), GFP_KERNEL); + fdt = kmemdup(fdt1, fdt_totalsize(fdt1), GFP_KERNEL); if (!fdt) { ret = -ENOMEM; goto free_fdt1; } /* Unflatten device tree blob */ - memcpy(fdt, fdt1, fdt_totalsize(fdt1)); dt = of_fdt_unflatten_tree(fdt, php_slot->dn, NULL); if (!dt) { ret = -EINVAL; @@ -328,10 +327,15 @@ out: return ret; } +static inline struct pnv_php_slot *to_pnv_php_slot(struct hotplug_slot *slot) +{ + return container_of(slot, struct pnv_php_slot, slot); +} + int pnv_php_set_slot_power_state(struct hotplug_slot *slot, uint8_t state) { - struct pnv_php_slot *php_slot = slot->private; + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); struct opal_msg msg; int ret; @@ -363,7 +367,7 @@ EXPORT_SYMBOL_GPL(pnv_php_set_slot_power_state); static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state) { - struct pnv_php_slot *php_slot = slot->private; + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); uint8_t power_state = OPAL_PCI_SLOT_POWER_ON; int ret; @@ -378,7 +382,6 @@ static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state) ret); } else { *state = power_state; - slot->info->power_status = power_state; } return 0; @@ -386,7 +389,7 @@ static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state) static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state) { - struct pnv_php_slot *php_slot = slot->private; + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); uint8_t presence = OPAL_PCI_SLOT_EMPTY; int ret; @@ -397,7 +400,6 @@ 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) { *state = presence; - slot->info->adapter_status = presence; ret = 0; } else { pci_warn(php_slot->pdev, "Error %d getting presence\n", ret); @@ -406,10 +408,20 @@ static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state) return ret; } +static int pnv_php_get_attention_state(struct hotplug_slot *slot, u8 *state) +{ + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); + + *state = php_slot->attention_state; + return 0; +} + static int pnv_php_set_attention_state(struct hotplug_slot *slot, u8 state) { + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); + /* FIXME: Make it real once firmware supports it */ - slot->info->attention_status = state; + php_slot->attention_state = state; return 0; } @@ -501,15 +513,14 @@ scan: static int pnv_php_enable_slot(struct hotplug_slot *slot) { - struct pnv_php_slot *php_slot = container_of(slot, - struct pnv_php_slot, slot); + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); return pnv_php_enable(php_slot, true); } static int pnv_php_disable_slot(struct hotplug_slot *slot) { - struct pnv_php_slot *php_slot = slot->private; + struct pnv_php_slot *php_slot = to_pnv_php_slot(slot); int ret; if (php_slot->state != PNV_PHP_STATE_POPULATED) @@ -530,9 +541,10 @@ static int pnv_php_disable_slot(struct hotplug_slot *slot) return ret; } -static struct hotplug_slot_ops php_slot_ops = { +static const struct hotplug_slot_ops php_slot_ops = { .get_power_status = pnv_php_get_power_state, .get_adapter_status = pnv_php_get_adapter_state, + .get_attention_status = pnv_php_get_attention_state, .set_attention_status = pnv_php_set_attention_state, .enable_slot = pnv_php_enable_slot, .disable_slot = pnv_php_disable_slot, @@ -594,8 +606,6 @@ static struct pnv_php_slot *pnv_php_alloc_slot(struct device_node *dn) php_slot->id = id; php_slot->power_state_check = false; php_slot->slot.ops = &php_slot_ops; - php_slot->slot.info = &php_slot->slot_info; - php_slot->slot.private = php_slot; INIT_LIST_HEAD(&php_slot->children); INIT_LIST_HEAD(&php_slot->link); diff --git a/drivers/pci/hotplug/rpaphp.h b/drivers/pci/hotplug/rpaphp.h index c8311724bd76..bdc954d70869 100644 --- a/drivers/pci/hotplug/rpaphp.h +++ b/drivers/pci/hotplug/rpaphp.h @@ -63,16 +63,22 @@ struct slot { u32 index; u32 type; u32 power_domain; + u8 attention_status; char *name; struct device_node *dn; struct pci_bus *bus; struct list_head *pci_devs; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; }; -extern struct hotplug_slot_ops rpaphp_hotplug_slot_ops; +extern const struct hotplug_slot_ops rpaphp_hotplug_slot_ops; extern struct list_head rpaphp_slot_head; +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); +} + /* function prototypes */ /* rpaphp_pci.c */ diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c index 857c358b727b..bcd5d357ca23 100644 --- a/drivers/pci/hotplug/rpaphp_core.c +++ b/drivers/pci/hotplug/rpaphp_core.c @@ -52,7 +52,7 @@ module_param_named(debug, rpaphp_debug, bool, 0644); static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) { int rc; - struct slot *slot = (struct slot *)hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); switch (value) { case 0: @@ -66,7 +66,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) rc = rtas_set_indicator(DR_INDICATOR, slot->index, value); if (!rc) - hotplug_slot->info->attention_status = value; + slot->attention_status = value; return rc; } @@ -79,7 +79,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value) static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { int retval, level; - struct slot *slot = (struct slot *)hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); retval = rtas_get_power_level(slot->power_domain, &level); if (!retval) @@ -94,14 +94,14 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) */ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = (struct slot *)hotplug_slot->private; - *value = slot->hotplug_slot->info->attention_status; + struct slot *slot = to_slot(hotplug_slot); + *value = slot->attention_status; return 0; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = (struct slot *)hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int rc, state; rc = rpaphp_get_sensor_state(slot, &state); @@ -409,7 +409,7 @@ static void __exit cleanup_slots(void) list_for_each_entry_safe(slot, next, &rpaphp_slot_head, rpaphp_slot_list) { list_del(&slot->rpaphp_slot_list); - pci_hp_deregister(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); dealloc_slot_struct(slot); } return; @@ -434,7 +434,7 @@ static void __exit rpaphp_exit(void) static int enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = (struct slot *)hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int state; int retval; @@ -464,7 +464,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) static int disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = (struct slot *)hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); if (slot->state == NOT_CONFIGURED) return -EINVAL; @@ -477,7 +477,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot) return 0; } -struct hotplug_slot_ops rpaphp_hotplug_slot_ops = { +const struct hotplug_slot_ops rpaphp_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .set_attention_status = set_attention_status, diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c index 0aac33e15dab..beca61badeea 100644 --- a/drivers/pci/hotplug/rpaphp_pci.c +++ b/drivers/pci/hotplug/rpaphp_pci.c @@ -54,25 +54,21 @@ int rpaphp_get_sensor_state(struct slot *slot, int *state) * rpaphp_enable_slot - record slot state, config pci device * @slot: target &slot * - * Initialize values in the slot, and the hotplug_slot info - * structures to indicate if there is a pci card plugged into - * the slot. If the slot is not empty, run the pcibios routine + * Initialize values in the slot structure to indicate if there is a pci card + * plugged into the slot. If the slot is not empty, run the pcibios routine * to get pcibios stuff correctly set up. */ int rpaphp_enable_slot(struct slot *slot) { int rc, level, state; struct pci_bus *bus; - struct hotplug_slot_info *info = slot->hotplug_slot->info; - info->adapter_status = NOT_VALID; slot->state = EMPTY; /* Find out if the power is turned on for the slot */ rc = rtas_get_power_level(slot->power_domain, &level); if (rc) return rc; - info->power_status = level; /* Figure out if there is an adapter in the slot */ rc = rpaphp_get_sensor_state(slot, &state); @@ -85,13 +81,11 @@ int rpaphp_enable_slot(struct slot *slot) return -EINVAL; } - info->adapter_status = EMPTY; slot->bus = bus; slot->pci_devs = &bus->devices; /* if there's an adapter in the slot, go add the pci devices */ if (state == PRESENT) { - info->adapter_status = NOT_CONFIGURED; slot->state = NOT_CONFIGURED; /* non-empty slot has to have child */ @@ -105,7 +99,6 @@ int rpaphp_enable_slot(struct slot *slot) pci_hp_add_devices(bus); if (!list_empty(&bus->devices)) { - info->adapter_status = CONFIGURED; slot->state = CONFIGURED; } diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c index b916c8e4372d..5282aa3e33c5 100644 --- a/drivers/pci/hotplug/rpaphp_slot.c +++ b/drivers/pci/hotplug/rpaphp_slot.c @@ -21,9 +21,7 @@ /* free up the memory used by a slot */ void dealloc_slot_struct(struct slot *slot) { - kfree(slot->hotplug_slot->info); kfree(slot->name); - kfree(slot->hotplug_slot); kfree(slot); } @@ -35,28 +33,16 @@ struct slot *alloc_slot_struct(struct device_node *dn, slot = kzalloc(sizeof(struct slot), GFP_KERNEL); if (!slot) goto error_nomem; - slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); - if (!slot->hotplug_slot) - goto error_slot; - slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), - GFP_KERNEL); - if (!slot->hotplug_slot->info) - goto error_hpslot; slot->name = kstrdup(drc_name, GFP_KERNEL); if (!slot->name) - goto error_info; + goto error_slot; slot->dn = dn; slot->index = drc_index; slot->power_domain = power_domain; - slot->hotplug_slot->private = slot; - slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops; + slot->hotplug_slot.ops = &rpaphp_hotplug_slot_ops; return (slot); -error_info: - kfree(slot->hotplug_slot->info); -error_hpslot: - kfree(slot->hotplug_slot); error_slot: kfree(slot); error_nomem: @@ -77,7 +63,7 @@ static int is_registered(struct slot *slot) int rpaphp_deregister_slot(struct slot *slot) { int retval = 0; - struct hotplug_slot *php_slot = slot->hotplug_slot; + struct hotplug_slot *php_slot = &slot->hotplug_slot; dbg("%s - Entry: deregistering slot=%s\n", __func__, slot->name); @@ -93,7 +79,7 @@ EXPORT_SYMBOL_GPL(rpaphp_deregister_slot); int rpaphp_register_slot(struct slot *slot) { - struct hotplug_slot *php_slot = slot->hotplug_slot; + struct hotplug_slot *php_slot = &slot->hotplug_slot; struct device_node *child; u32 my_index; int retval; diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c index 93b5341d282c..30ee72268790 100644 --- a/drivers/pci/hotplug/s390_pci_hpc.c +++ b/drivers/pci/hotplug/s390_pci_hpc.c @@ -32,10 +32,15 @@ static int zpci_fn_configured(enum zpci_state state) */ struct slot { struct list_head slot_list; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct zpci_dev *zdev; }; +static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +{ + return container_of(hotplug_slot, struct slot, hotplug_slot); +} + static inline int slot_configure(struct slot *slot) { int ret = sclp_pci_configure(slot->zdev->fid); @@ -60,7 +65,7 @@ static inline int slot_deconfigure(struct slot *slot) static int enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); int rc; if (slot->zdev->state != ZPCI_FN_STATE_STANDBY) @@ -88,7 +93,7 @@ out_deconfigure: static int disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); struct pci_dev *pdev; int rc; @@ -110,7 +115,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot) static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; + struct slot *slot = to_slot(hotplug_slot); switch (slot->zdev->state) { case ZPCI_FN_STATE_STANDBY: @@ -130,7 +135,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) return 0; } -static struct hotplug_slot_ops s390_hotplug_slot_ops = { +static const struct hotplug_slot_ops s390_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status, @@ -139,8 +144,6 @@ static struct hotplug_slot_ops s390_hotplug_slot_ops = { int zpci_init_slot(struct zpci_dev *zdev) { - struct hotplug_slot *hotplug_slot; - struct hotplug_slot_info *info; char name[SLOT_NAME_SIZE]; struct slot *slot; int rc; @@ -152,26 +155,11 @@ int zpci_init_slot(struct zpci_dev *zdev) if (!slot) goto error; - hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); - if (!hotplug_slot) - goto error_hp; - hotplug_slot->private = slot; - - slot->hotplug_slot = hotplug_slot; slot->zdev = zdev; - - info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) - goto error_info; - hotplug_slot->info = info; - - hotplug_slot->ops = &s390_hotplug_slot_ops; - - get_power_status(hotplug_slot, &info->power_status); - get_adapter_status(hotplug_slot, &info->adapter_status); + slot->hotplug_slot.ops = &s390_hotplug_slot_ops; snprintf(name, SLOT_NAME_SIZE, "%08x", zdev->fid); - rc = pci_hp_register(slot->hotplug_slot, zdev->bus, + rc = pci_hp_register(&slot->hotplug_slot, zdev->bus, ZPCI_DEVFN, name); if (rc) goto error_reg; @@ -180,10 +168,6 @@ int zpci_init_slot(struct zpci_dev *zdev) return 0; error_reg: - kfree(info); -error_info: - kfree(hotplug_slot); -error_hp: kfree(slot); error: return -ENOMEM; @@ -198,9 +182,7 @@ void zpci_exit_slot(struct zpci_dev *zdev) if (slot->zdev != zdev) continue; list_del(&slot->slot_list); - pci_hp_deregister(slot->hotplug_slot); - kfree(slot->hotplug_slot->info); - kfree(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); kfree(slot); } } diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c index babd23409f61..231f5bdd3d2d 100644 --- a/drivers/pci/hotplug/sgi_hotplug.c +++ b/drivers/pci/hotplug/sgi_hotplug.c @@ -56,7 +56,7 @@ struct slot { int device_num; struct pci_bus *pci_bus; /* this struct for glue internal only */ - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct list_head hp_list; char physical_path[SN_SLOT_NAME_SIZE]; }; @@ -80,7 +80,7 @@ static int enable_slot(struct hotplug_slot *slot); static int disable_slot(struct hotplug_slot *slot); static inline int get_power_status(struct hotplug_slot *slot, u8 *value); -static struct hotplug_slot_ops sn_hotplug_slot_ops = { +static const struct hotplug_slot_ops sn_hotplug_slot_ops = { .enable_slot = enable_slot, .disable_slot = disable_slot, .get_power_status = get_power_status, @@ -88,10 +88,15 @@ static struct hotplug_slot_ops sn_hotplug_slot_ops = { static DEFINE_MUTEX(sn_hotplug_mutex); +static struct slot *to_slot(struct hotplug_slot *bss_hotplug_slot) +{ + return container_of(bss_hotplug_slot, struct slot, hotplug_slot); +} + static ssize_t path_show(struct pci_slot *pci_slot, char *buf) { int retval = -ENOENT; - struct slot *slot = pci_slot->hotplug->private; + struct slot *slot = to_slot(pci_slot->hotplug); if (!slot) return retval; @@ -156,7 +161,7 @@ static int sn_pci_bus_valid(struct pci_bus *pci_bus) return -EIO; } -static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, +static int sn_hp_slot_private_alloc(struct hotplug_slot **bss_hotplug_slot, struct pci_bus *pci_bus, int device, char *name) { @@ -168,7 +173,6 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, slot = kzalloc(sizeof(*slot), GFP_KERNEL); if (!slot) return -ENOMEM; - bss_hotplug_slot->private = slot; slot->device_num = device; slot->pci_bus = pci_bus; @@ -179,8 +183,8 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot, sn_generate_path(pci_bus, slot->physical_path); - slot->hotplug_slot = bss_hotplug_slot; list_add(&slot->hp_list, &sn_hp_list); + *bss_hotplug_slot = &slot->hotplug_slot; return 0; } @@ -192,10 +196,9 @@ static struct hotplug_slot *sn_hp_destroy(void) struct hotplug_slot *bss_hotplug_slot = NULL; list_for_each_entry(slot, &sn_hp_list, hp_list) { - bss_hotplug_slot = slot->hotplug_slot; + bss_hotplug_slot = &slot->hotplug_slot; pci_slot = bss_hotplug_slot->pci_slot; - list_del(&((struct slot *)bss_hotplug_slot->private)-> - hp_list); + list_del(&slot->hp_list); sysfs_remove_file(&pci_slot->kobj, &sn_slot_path_attr.attr); break; @@ -227,7 +230,7 @@ static void sn_bus_free_data(struct pci_dev *dev) static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, int device_num, char **ssdt) { - struct slot *slot = bss_hotplug_slot->private; + struct slot *slot = to_slot(bss_hotplug_slot); struct pcibus_info *pcibus_info; struct pcibr_slot_enable_resp resp; int rc; @@ -267,7 +270,7 @@ static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot, static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, int device_num, int action) { - struct slot *slot = bss_hotplug_slot->private; + struct slot *slot = to_slot(bss_hotplug_slot); struct pcibus_info *pcibus_info; struct pcibr_slot_disable_resp resp; int rc; @@ -323,7 +326,7 @@ static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot, */ static int enable_slot(struct hotplug_slot *bss_hotplug_slot) { - struct slot *slot = bss_hotplug_slot->private; + struct slot *slot = to_slot(bss_hotplug_slot); struct pci_bus *new_bus = NULL; struct pci_dev *dev; int num_funcs; @@ -469,7 +472,7 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot) static int disable_slot(struct hotplug_slot *bss_hotplug_slot) { - struct slot *slot = bss_hotplug_slot->private; + struct slot *slot = to_slot(bss_hotplug_slot); struct pci_dev *dev, *temp; int rc; acpi_handle ssdt_hdl = NULL; @@ -571,7 +574,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot) static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value) { - struct slot *slot = bss_hotplug_slot->private; + struct slot *slot = to_slot(bss_hotplug_slot); struct pcibus_info *pcibus_info; u32 power; @@ -585,9 +588,7 @@ static inline int get_power_status(struct hotplug_slot *bss_hotplug_slot, static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot) { - kfree(bss_hotplug_slot->info); - kfree(bss_hotplug_slot->private); - kfree(bss_hotplug_slot); + kfree(to_slot(bss_hotplug_slot)); } static int sn_hotplug_slot_register(struct pci_bus *pci_bus) @@ -607,22 +608,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus) if (sn_pci_slot_valid(pci_bus, device) != 1) continue; - bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot), - GFP_KERNEL); - if (!bss_hotplug_slot) { - rc = -ENOMEM; - goto alloc_err; - } - - bss_hotplug_slot->info = - kzalloc(sizeof(struct hotplug_slot_info), - GFP_KERNEL); - if (!bss_hotplug_slot->info) { - rc = -ENOMEM; - goto alloc_err; - } - - if (sn_hp_slot_private_alloc(bss_hotplug_slot, + if (sn_hp_slot_private_alloc(&bss_hotplug_slot, pci_bus, device, name)) { rc = -ENOMEM; goto alloc_err; @@ -637,7 +623,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus) rc = sysfs_create_file(&pci_slot->kobj, &sn_slot_path_attr.attr); if (rc) - goto register_err; + goto alloc_err; } pci_dbg(pci_bus->self, "Registered bus with hotplug\n"); return rc; @@ -646,14 +632,11 @@ register_err: pci_dbg(pci_bus->self, "bus failed to register with err = %d\n", rc); -alloc_err: - if (rc == -ENOMEM) - pci_dbg(pci_bus->self, "Memory allocation error\n"); - /* destroy THIS element */ - if (bss_hotplug_slot) - sn_release_slot(bss_hotplug_slot); + sn_hp_destroy(); + sn_release_slot(bss_hotplug_slot); +alloc_err: /* destroy anything else on the list */ while ((bss_hotplug_slot = sn_hp_destroy())) { pci_hp_deregister(bss_hotplug_slot); diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h index 516e4835019c..f7f13ee5d06e 100644 --- a/drivers/pci/hotplug/shpchp.h +++ b/drivers/pci/hotplug/shpchp.h @@ -67,11 +67,13 @@ struct slot { u32 number; u8 is_a_board; u8 state; + u8 attention_save; u8 presence_save; + u8 latch_save; u8 pwr_save; struct controller *ctrl; const struct hpc_ops *hpc_ops; - struct hotplug_slot *hotplug_slot; + struct hotplug_slot hotplug_slot; struct list_head slot_list; struct delayed_work work; /* work for button event */ struct mutex lock; @@ -169,7 +171,7 @@ int shpc_init(struct controller *ctrl, struct pci_dev *pdev); static inline const char *slot_name(struct slot *slot) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(&slot->hotplug_slot); } struct ctrl_reg { @@ -207,7 +209,7 @@ enum ctrl_offsets { static inline struct slot *get_slot(struct hotplug_slot *hotplug_slot) { - return hotplug_slot->private; + return container_of(hotplug_slot, struct slot, hotplug_slot); } static inline struct slot *shpchp_find_slot(struct controller *ctrl, u8 device) diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c index 97cee23f3d51..81a918d47895 100644 --- a/drivers/pci/hotplug/shpchp_core.c +++ b/drivers/pci/hotplug/shpchp_core.c @@ -51,7 +51,7 @@ static int get_attention_status(struct hotplug_slot *slot, u8 *value); static int get_latch_status(struct hotplug_slot *slot, u8 *value); static int get_adapter_status(struct hotplug_slot *slot, u8 *value); -static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { +static const struct hotplug_slot_ops shpchp_hotplug_slot_ops = { .set_attention_status = set_attention_status, .enable_slot = enable_slot, .disable_slot = disable_slot, @@ -65,7 +65,6 @@ static int init_slots(struct controller *ctrl) { struct slot *slot; struct hotplug_slot *hotplug_slot; - struct hotplug_slot_info *info; char name[SLOT_NAME_SIZE]; int retval; int i; @@ -77,19 +76,7 @@ static int init_slots(struct controller *ctrl) goto error; } - hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); - if (!hotplug_slot) { - retval = -ENOMEM; - goto error_slot; - } - slot->hotplug_slot = hotplug_slot; - - info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) { - retval = -ENOMEM; - goto error_hpslot; - } - hotplug_slot->info = info; + hotplug_slot = &slot->hotplug_slot; slot->hp_slot = i; slot->ctrl = ctrl; @@ -101,14 +88,13 @@ static int init_slots(struct controller *ctrl) slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number); if (!slot->wq) { retval = -ENOMEM; - goto error_info; + goto error_slot; } mutex_init(&slot->lock); INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); /* register this slot with the hotplug pci core */ - hotplug_slot->private = slot; snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); hotplug_slot->ops = &shpchp_hotplug_slot_ops; @@ -116,7 +102,7 @@ static int init_slots(struct controller *ctrl) pci_domain_nr(ctrl->pci_dev->subordinate), slot->bus, slot->device, slot->hp_slot, slot->number, ctrl->slot_device_offset); - retval = pci_hp_register(slot->hotplug_slot, + retval = pci_hp_register(hotplug_slot, ctrl->pci_dev->subordinate, slot->device, name); if (retval) { ctrl_err(ctrl, "pci_hp_register failed with error %d\n", @@ -124,10 +110,10 @@ static int init_slots(struct controller *ctrl) goto error_slotwq; } - get_power_status(hotplug_slot, &info->power_status); - get_attention_status(hotplug_slot, &info->attention_status); - get_latch_status(hotplug_slot, &info->latch_status); - get_adapter_status(hotplug_slot, &info->adapter_status); + get_power_status(hotplug_slot, &slot->pwr_save); + get_attention_status(hotplug_slot, &slot->attention_save); + get_latch_status(hotplug_slot, &slot->latch_save); + get_adapter_status(hotplug_slot, &slot->presence_save); list_add(&slot->slot_list, &ctrl->slot_list); } @@ -135,10 +121,6 @@ static int init_slots(struct controller *ctrl) return 0; error_slotwq: destroy_workqueue(slot->wq); -error_info: - kfree(info); -error_hpslot: - kfree(hotplug_slot); error_slot: kfree(slot); error: @@ -153,9 +135,7 @@ void cleanup_slots(struct controller *ctrl) list_del(&slot->slot_list); cancel_delayed_work(&slot->work); destroy_workqueue(slot->wq); - pci_hp_deregister(slot->hotplug_slot); - kfree(slot->hotplug_slot->info); - kfree(slot->hotplug_slot); + pci_hp_deregister(&slot->hotplug_slot); kfree(slot); } } @@ -170,7 +150,7 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", __func__, slot_name(slot)); - hotplug_slot->info->attention_status = status; + slot->attention_save = status; slot->hpc_ops->set_attention_status(slot, status); return 0; @@ -206,7 +186,7 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) retval = slot->hpc_ops->get_power_status(slot, value); if (retval < 0) - *value = hotplug_slot->info->power_status; + *value = slot->pwr_save; return 0; } @@ -221,7 +201,7 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) retval = slot->hpc_ops->get_attention_status(slot, value); if (retval < 0) - *value = hotplug_slot->info->attention_status; + *value = slot->attention_save; return 0; } @@ -236,7 +216,7 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) retval = slot->hpc_ops->get_latch_status(slot, value); if (retval < 0) - *value = hotplug_slot->info->latch_status; + *value = slot->latch_save; return 0; } @@ -251,7 +231,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) retval = slot->hpc_ops->get_adapter_status(slot, value); if (retval < 0) - *value = hotplug_slot->info->adapter_status; + *value = slot->presence_save; return 0; } diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c index 1267dcc5a531..078003dcde5b 100644 --- a/drivers/pci/hotplug/shpchp_ctrl.c +++ b/drivers/pci/hotplug/shpchp_ctrl.c @@ -446,23 +446,12 @@ void shpchp_queue_pushbutton_work(struct work_struct *work) mutex_unlock(&p_slot->lock); } -static int update_slot_info (struct slot *slot) +static void update_slot_info(struct slot *slot) { - struct hotplug_slot_info *info; - int result; - - info = kmalloc(sizeof(*info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - slot->hpc_ops->get_power_status(slot, &(info->power_status)); - slot->hpc_ops->get_attention_status(slot, &(info->attention_status)); - slot->hpc_ops->get_latch_status(slot, &(info->latch_status)); - slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status)); - - result = pci_hp_change_slot_info(slot->hotplug_slot, info); - kfree (info); - return result; + slot->hpc_ops->get_power_status(slot, &slot->pwr_save); + slot->hpc_ops->get_attention_status(slot, &slot->attention_save); + slot->hpc_ops->get_latch_status(slot, &slot->latch_save); + slot->hpc_ops->get_adapter_status(slot, &slot->presence_save); } /* diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 8f75ba068d45..79c8e955a0ab 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -519,6 +519,46 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) return PCI_POWER_ERROR; } +static struct acpi_device *acpi_pci_find_companion(struct device *dev); + +static bool acpi_pci_bridge_d3(struct pci_dev *dev) +{ + const struct fwnode_handle *fwnode; + struct acpi_device *adev; + struct pci_dev *root; + u8 val; + + if (!dev->is_hotplug_bridge) + return false; + + /* + * Look for a special _DSD property for the root port and if it + * is set we know the hierarchy behind it supports D3 just fine. + */ + root = pci_find_pcie_root_port(dev); + if (!root) + return false; + + adev = ACPI_COMPANION(&root->dev); + if (root == dev) { + /* + * It is possible that the ACPI companion is not yet bound + * for the root port so look it up manually here. + */ + if (!adev && !pci_dev_is_added(root)) + adev = acpi_pci_find_companion(&root->dev); + } + + if (!adev) + return false; + + fwnode = acpi_fwnode_handle(adev); + if (fwnode_property_read_u8(fwnode, "HotPlugSupportInD3", &val)) + return false; + + return val == 1; +} + static bool acpi_pci_power_manageable(struct pci_dev *dev) { struct acpi_device *adev = ACPI_COMPANION(&dev->dev); @@ -635,6 +675,7 @@ static bool acpi_pci_need_resume(struct pci_dev *dev) } static const struct pci_platform_pm_ops acpi_pci_platform_pm = { + .bridge_d3 = acpi_pci_bridge_d3, .is_manageable = acpi_pci_power_manageable, .set_state = acpi_pci_set_power_state, .get_state = acpi_pci_get_power_state, @@ -767,19 +808,33 @@ static void pci_acpi_setup(struct device *dev) return; device_set_wakeup_capable(dev, true); + /* + * For bridges that can do D3 we enable wake automatically (as + * we do for the power management itself in that case). The + * reason is that the bridge may have additional methods such as + * _DSW that need to be called. + */ + if (pci_dev->bridge_d3) + device_wakeup_enable(dev); + acpi_pci_wakeup(pci_dev, false); } static void pci_acpi_cleanup(struct device *dev) { struct acpi_device *adev = ACPI_COMPANION(dev); + struct pci_dev *pci_dev = to_pci_dev(dev); if (!adev) return; pci_acpi_remove_pm_notifier(adev); - if (adev->wakeup.flags.valid) + if (adev->wakeup.flags.valid) { + if (pci_dev->bridge_d3) + device_wakeup_disable(dev); + device_set_wakeup_capable(dev, false); + } } static bool pci_acpi_bus_match(struct device *dev) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ee7c2f4eef9b..b309ce855577 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -35,6 +35,8 @@ #include <linux/aer.h> #include "pci.h" +DEFINE_MUTEX(pci_slot_mutex); + const char *pci_power_names[] = { "error", "D0", "D1", "D2", "D3hot", "D3cold", "unknown", }; @@ -791,6 +793,11 @@ static inline bool platform_pci_need_resume(struct pci_dev *dev) return pci_platform_pm ? pci_platform_pm->need_resume(dev) : false; } +static inline bool platform_pci_bridge_d3(struct pci_dev *dev) +{ + return pci_platform_pm ? pci_platform_pm->bridge_d3(dev) : false; +} + /** * pci_raw_set_power_state - Use PCI PM registers to set the power state of * given PCI device @@ -1284,6 +1291,7 @@ int pci_save_state(struct pci_dev *dev) if (i != 0) return i; + pci_save_dpc_state(dev); return pci_save_vc_state(dev); } EXPORT_SYMBOL(pci_save_state); @@ -1378,6 +1386,7 @@ void pci_restore_state(struct pci_dev *dev) pci_restore_ats_state(dev); pci_restore_vc_state(dev); pci_restore_rebar_state(dev); + pci_restore_dpc_state(dev); pci_cleanup_aer_error_status_regs(dev); @@ -2133,10 +2142,13 @@ static int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable int ret = 0; /* - * Bridges can only signal wakeup on behalf of subordinate devices, - * but that is set up elsewhere, so skip them. + * Bridges that are not power-manageable directly only signal + * wakeup on behalf of subordinate devices which is set up + * elsewhere, so skip them. However, bridges that are + * power-manageable may signal wakeup for themselves (for example, + * on a hotplug event) and they need to be covered here. */ - if (pci_has_subordinate(dev)) + if (!pci_power_manageable(dev)) return 0; /* Don't do the same thing twice in a row for one device. */ @@ -2511,6 +2523,10 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge) if (bridge->is_thunderbolt) return true; + /* Platform might know better if the bridge supports D3 */ + if (platform_pci_bridge_d3(bridge)) + return true; + /* * Hotplug ports handled natively by the OS were not validated * by vendors for runtime D3 at least until 2018 because there @@ -4496,21 +4512,42 @@ bool pcie_wait_for_link(struct pci_dev *pdev, bool active) bool ret; u16 lnk_status; + /* + * Some controllers might not implement link active reporting. In this + * case, we wait for 1000 + 100 ms. + */ + if (!pdev->link_active_reporting) { + msleep(1100); + return true; + } + + /* + * PCIe r4.0 sec 6.6.1, a component must enter LTSSM Detect within 20ms, + * after which we should expect an link active if the reset was + * successful. If so, software must wait a minimum 100ms before sending + * configuration requests to devices downstream this port. + * + * If the link fails to activate, either the device was physically + * removed or the link is permanently failed. + */ + if (active) + msleep(20); for (;;) { pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnk_status); ret = !!(lnk_status & PCI_EXP_LNKSTA_DLLLA); if (ret == active) - return true; + break; if (timeout <= 0) break; msleep(10); timeout -= 10; } - - pci_info(pdev, "Data Link Layer Link Active not %s in 1000 msec\n", - active ? "set" : "cleared"); - - return false; + if (active && ret) + msleep(100); + else if (ret != active) + pci_info(pdev, "Data Link Layer Link Active not %s in 1000 msec\n", + active ? "set" : "cleared"); + return ret == active; } void pci_reset_secondary_bus(struct pci_dev *dev) @@ -4582,13 +4619,13 @@ static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe) { int rc = -ENOTTY; - if (!hotplug || !try_module_get(hotplug->ops->owner)) + if (!hotplug || !try_module_get(hotplug->owner)) return rc; if (hotplug->ops->reset_slot) rc = hotplug->ops->reset_slot(hotplug, probe); - module_put(hotplug->ops->owner); + module_put(hotplug->owner); return rc; } @@ -5165,6 +5202,41 @@ static int pci_bus_reset(struct pci_bus *bus, int probe) } /** + * pci_bus_error_reset - reset the bridge's subordinate bus + * @bridge: The parent device that connects to the bus to reset + * + * This function will first try to reset the slots on this bus if the method is + * available. If slot reset fails or is not available, this will fall back to a + * secondary bus reset. + */ +int pci_bus_error_reset(struct pci_dev *bridge) +{ + struct pci_bus *bus = bridge->subordinate; + struct pci_slot *slot; + + if (!bus) + return -ENOTTY; + + mutex_lock(&pci_slot_mutex); + if (list_empty(&bus->slots)) + goto bus_reset; + + list_for_each_entry(slot, &bus->slots, list) + if (pci_probe_reset_slot(slot)) + goto bus_reset; + + list_for_each_entry(slot, &bus->slots, list) + if (pci_slot_reset(slot, 0)) + goto bus_reset; + + mutex_unlock(&pci_slot_mutex); + return 0; +bus_reset: + mutex_unlock(&pci_slot_mutex); + return pci_bus_reset(bridge->subordinate, 0); +} + +/** * pci_probe_reset_bus - probe whether a PCI bus can be reset * @bus: PCI bus to probe * diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 6e0d1528d471..672ba4d1659e 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -35,10 +35,13 @@ int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, int pci_probe_reset_function(struct pci_dev *dev); int pci_bridge_secondary_bus_reset(struct pci_dev *dev); +int pci_bus_error_reset(struct pci_dev *dev); /** * struct pci_platform_pm_ops - Firmware PM callbacks * + * @bridge_d3: Does the bridge allow entering into D3 + * * @is_manageable: returns 'true' if given device is power manageable by the * platform firmware * @@ -60,6 +63,7 @@ int pci_bridge_secondary_bus_reset(struct pci_dev *dev); * these callbacks are mandatory. */ struct pci_platform_pm_ops { + bool (*bridge_d3)(struct pci_dev *dev); bool (*is_manageable)(struct pci_dev *dev); int (*set_state)(struct pci_dev *dev, pci_power_t state); pci_power_t (*get_state)(struct pci_dev *dev); @@ -136,6 +140,7 @@ static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } /* Lock for read/write access to pci device and bus lists */ extern struct rw_semaphore pci_bus_sem; +extern struct mutex pci_slot_mutex; extern raw_spinlock_t pci_lock; @@ -293,21 +298,71 @@ struct pci_sriov { bool drivers_autoprobe; /* Auto probing of VFs by driver */ }; -/* pci_dev priv_flags */ -#define PCI_DEV_DISCONNECTED 0 -#define PCI_DEV_ADDED 1 +/** + * pci_dev_set_io_state - Set the new error state if possible. + * + * @dev - pci device to set new error_state + * @new - the state we want dev to be in + * + * Must be called with device_lock held. + * + * Returns true if state has been changed to the requested state. + */ +static inline bool pci_dev_set_io_state(struct pci_dev *dev, + pci_channel_state_t new) +{ + bool changed = false; + + device_lock_assert(&dev->dev); + switch (new) { + case pci_channel_io_perm_failure: + switch (dev->error_state) { + case pci_channel_io_frozen: + case pci_channel_io_normal: + case pci_channel_io_perm_failure: + changed = true; + break; + } + break; + case pci_channel_io_frozen: + switch (dev->error_state) { + case pci_channel_io_frozen: + case pci_channel_io_normal: + changed = true; + break; + } + break; + case pci_channel_io_normal: + switch (dev->error_state) { + case pci_channel_io_frozen: + case pci_channel_io_normal: + changed = true; + break; + } + break; + } + if (changed) + dev->error_state = new; + return changed; +} static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused) { - set_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags); + device_lock(&dev->dev); + pci_dev_set_io_state(dev, pci_channel_io_perm_failure); + device_unlock(&dev->dev); + return 0; } static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) { - return test_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags); + return dev->error_state == pci_channel_io_perm_failure; } +/* pci_dev priv_flags */ +#define PCI_DEV_ADDED 0 + static inline void pci_dev_assign_added(struct pci_dev *dev, bool added) { assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added); @@ -346,6 +401,14 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info); void aer_print_error(struct pci_dev *dev, struct aer_err_info *info); #endif /* CONFIG_PCIEAER */ +#ifdef CONFIG_PCIE_DPC +void pci_save_dpc_state(struct pci_dev *dev); +void pci_restore_dpc_state(struct pci_dev *dev); +#else +static inline void pci_save_dpc_state(struct pci_dev *dev) {} +static inline void pci_restore_dpc_state(struct pci_dev *dev) {} +#endif + #ifdef CONFIG_PCI_ATS void pci_restore_ats_state(struct pci_dev *dev); #else @@ -423,8 +486,8 @@ static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) #endif /* PCI error reporting and recovery */ -void pcie_do_fatal_recovery(struct pci_dev *dev, u32 service); -void pcie_do_nonfatal_recovery(struct pci_dev *dev); +void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, + u32 service); bool pcie_wait_for_link(struct pci_dev *pdev, bool active); #ifdef CONFIG_PCIEASPM diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 83180edd6ed4..a90a9194ac4a 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -30,7 +30,7 @@ #include "../pci.h" #include "portdrv.h" -#define AER_ERROR_SOURCES_MAX 100 +#define AER_ERROR_SOURCES_MAX 128 #define AER_MAX_TYPEOF_COR_ERRS 16 /* as per PCI_ERR_COR_STATUS */ #define AER_MAX_TYPEOF_UNCOR_ERRS 26 /* as per PCI_ERR_UNCOR_STATUS*/ @@ -42,21 +42,7 @@ struct aer_err_source { struct aer_rpc { struct pci_dev *rpd; /* Root Port device */ - struct work_struct dpc_handler; - struct aer_err_source e_sources[AER_ERROR_SOURCES_MAX]; - struct aer_err_info e_info; - unsigned short prod_idx; /* Error Producer Index */ - unsigned short cons_idx; /* Error Consumer Index */ - int isr; - spinlock_t e_lock; /* - * Lock access to Error Status/ID Regs - * and error producer/consumer index - */ - struct mutex rpc_mutex; /* - * only one thread could do - * recovery on the same - * root port hierarchy - */ + DECLARE_KFIFO(aer_fifo, struct aer_err_source, AER_ERROR_SOURCES_MAX); }; /* AER stats for the device */ @@ -866,7 +852,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity, static int add_error_device(struct aer_err_info *e_info, struct pci_dev *dev) { if (e_info->error_dev_num < AER_MAX_MULTI_ERR_DEVICES) { - e_info->dev[e_info->error_dev_num] = dev; + e_info->dev[e_info->error_dev_num] = pci_dev_get(dev); e_info->error_dev_num++; return 0; } @@ -1010,9 +996,12 @@ static void handle_error_source(struct pci_dev *dev, struct aer_err_info *info) info->status); pci_aer_clear_device_status(dev); } else if (info->severity == AER_NONFATAL) - pcie_do_nonfatal_recovery(dev); + pcie_do_recovery(dev, pci_channel_io_normal, + PCIE_PORT_SERVICE_AER); else if (info->severity == AER_FATAL) - pcie_do_fatal_recovery(dev, PCIE_PORT_SERVICE_AER); + pcie_do_recovery(dev, pci_channel_io_frozen, + PCIE_PORT_SERVICE_AER); + pci_dev_put(dev); } #ifdef CONFIG_ACPI_APEI_PCIEAER @@ -1047,9 +1036,11 @@ static void aer_recover_work_func(struct work_struct *work) } cper_print_aer(pdev, entry.severity, entry.regs); if (entry.severity == AER_NONFATAL) - pcie_do_nonfatal_recovery(pdev); + pcie_do_recovery(pdev, pci_channel_io_normal, + PCIE_PORT_SERVICE_AER); else if (entry.severity == AER_FATAL) - pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_AER); + pcie_do_recovery(pdev, pci_channel_io_frozen, + PCIE_PORT_SERVICE_AER); pci_dev_put(pdev); } } @@ -1065,7 +1056,6 @@ static DECLARE_WORK(aer_recover_work, aer_recover_work_func); void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, int severity, struct aer_capability_regs *aer_regs) { - unsigned long flags; struct aer_recover_entry entry = { .bus = bus, .devfn = devfn, @@ -1074,13 +1064,12 @@ void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, .regs = aer_regs, }; - spin_lock_irqsave(&aer_recover_ring_lock, flags); - if (kfifo_put(&aer_recover_ring, entry)) + if (kfifo_in_spinlocked(&aer_recover_ring, &entry, sizeof(entry), + &aer_recover_ring_lock)) schedule_work(&aer_recover_work); else pr_err("AER recover: Buffer overflow when recovering AER for %04x:%02x:%02x:%x\n", domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); - spin_unlock_irqrestore(&aer_recover_ring_lock, flags); } EXPORT_SYMBOL_GPL(aer_recover_queue); #endif @@ -1115,8 +1104,9 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info) &info->mask); if (!(info->status & ~info->mask)) return 0; - } else if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || - info->severity == AER_NONFATAL) { + } else if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || + pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM || + info->severity == AER_NONFATAL) { /* Link is still healthy for IO reads */ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, @@ -1170,7 +1160,7 @@ static void aer_isr_one_error(struct aer_rpc *rpc, struct aer_err_source *e_src) { struct pci_dev *pdev = rpc->rpd; - struct aer_err_info *e_info = &rpc->e_info; + struct aer_err_info e_info; pci_rootport_aer_stats_incr(pdev, e_src); @@ -1179,83 +1169,57 @@ static void aer_isr_one_error(struct aer_rpc *rpc, * uncorrectable error being logged. Report correctable error first. */ if (e_src->status & PCI_ERR_ROOT_COR_RCV) { - e_info->id = ERR_COR_ID(e_src->id); - e_info->severity = AER_CORRECTABLE; + e_info.id = ERR_COR_ID(e_src->id); + e_info.severity = AER_CORRECTABLE; if (e_src->status & PCI_ERR_ROOT_MULTI_COR_RCV) - e_info->multi_error_valid = 1; + e_info.multi_error_valid = 1; else - e_info->multi_error_valid = 0; - aer_print_port_info(pdev, e_info); + e_info.multi_error_valid = 0; + aer_print_port_info(pdev, &e_info); - if (find_source_device(pdev, e_info)) - aer_process_err_devices(e_info); + if (find_source_device(pdev, &e_info)) + aer_process_err_devices(&e_info); } if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) { - e_info->id = ERR_UNCOR_ID(e_src->id); + e_info.id = ERR_UNCOR_ID(e_src->id); if (e_src->status & PCI_ERR_ROOT_FATAL_RCV) - e_info->severity = AER_FATAL; + e_info.severity = AER_FATAL; else - e_info->severity = AER_NONFATAL; + e_info.severity = AER_NONFATAL; if (e_src->status & PCI_ERR_ROOT_MULTI_UNCOR_RCV) - e_info->multi_error_valid = 1; + e_info.multi_error_valid = 1; else - e_info->multi_error_valid = 0; + e_info.multi_error_valid = 0; - aer_print_port_info(pdev, e_info); + aer_print_port_info(pdev, &e_info); - if (find_source_device(pdev, e_info)) - aer_process_err_devices(e_info); + if (find_source_device(pdev, &e_info)) + aer_process_err_devices(&e_info); } } /** - * get_e_source - retrieve an error source - * @rpc: pointer to the root port which holds an error - * @e_src: pointer to store retrieved error source - * - * Return 1 if an error source is retrieved, otherwise 0. - * - * Invoked by DPC handler to consume an error. - */ -static int get_e_source(struct aer_rpc *rpc, struct aer_err_source *e_src) -{ - unsigned long flags; - - /* Lock access to Root error producer/consumer index */ - spin_lock_irqsave(&rpc->e_lock, flags); - if (rpc->prod_idx == rpc->cons_idx) { - spin_unlock_irqrestore(&rpc->e_lock, flags); - return 0; - } - - *e_src = rpc->e_sources[rpc->cons_idx]; - rpc->cons_idx++; - if (rpc->cons_idx == AER_ERROR_SOURCES_MAX) - rpc->cons_idx = 0; - spin_unlock_irqrestore(&rpc->e_lock, flags); - - return 1; -} - -/** * aer_isr - consume errors detected by root port * @work: definition of this work item * * Invoked, as DPC, when root port records new detected error */ -static void aer_isr(struct work_struct *work) +static irqreturn_t aer_isr(int irq, void *context) { - struct aer_rpc *rpc = container_of(work, struct aer_rpc, dpc_handler); + struct pcie_device *dev = (struct pcie_device *)context; + struct aer_rpc *rpc = get_service_data(dev); struct aer_err_source uninitialized_var(e_src); - mutex_lock(&rpc->rpc_mutex); - while (get_e_source(rpc, &e_src)) + if (kfifo_is_empty(&rpc->aer_fifo)) + return IRQ_NONE; + + while (kfifo_get(&rpc->aer_fifo, &e_src)) aer_isr_one_error(rpc, &e_src); - mutex_unlock(&rpc->rpc_mutex); + return IRQ_HANDLED; } /** @@ -1265,56 +1229,26 @@ static void aer_isr(struct work_struct *work) * * Invoked when Root Port detects AER messages. */ -irqreturn_t aer_irq(int irq, void *context) +static irqreturn_t aer_irq(int irq, void *context) { - unsigned int status, id; struct pcie_device *pdev = (struct pcie_device *)context; struct aer_rpc *rpc = get_service_data(pdev); - int next_prod_idx; - unsigned long flags; - int pos; - - pos = pdev->port->aer_cap; - /* - * Must lock access to Root Error Status Reg, Root Error ID Reg, - * and Root error producer/consumer index - */ - spin_lock_irqsave(&rpc->e_lock, flags); + struct pci_dev *rp = rpc->rpd; + struct aer_err_source e_src = {}; + int pos = rp->aer_cap; - /* Read error status */ - pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, &status); - if (!(status & (PCI_ERR_ROOT_UNCOR_RCV|PCI_ERR_ROOT_COR_RCV))) { - spin_unlock_irqrestore(&rpc->e_lock, flags); + pci_read_config_dword(rp, pos + PCI_ERR_ROOT_STATUS, &e_src.status); + if (!(e_src.status & (PCI_ERR_ROOT_UNCOR_RCV|PCI_ERR_ROOT_COR_RCV))) return IRQ_NONE; - } - /* Read error source and clear error status */ - pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_ERR_SRC, &id); - pci_write_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, status); + pci_read_config_dword(rp, pos + PCI_ERR_ROOT_ERR_SRC, &e_src.id); + pci_write_config_dword(rp, pos + PCI_ERR_ROOT_STATUS, e_src.status); - /* Store error source for later DPC handler */ - next_prod_idx = rpc->prod_idx + 1; - if (next_prod_idx == AER_ERROR_SOURCES_MAX) - next_prod_idx = 0; - if (next_prod_idx == rpc->cons_idx) { - /* - * Error Storm Condition - possibly the same error occurred. - * Drop the error. - */ - spin_unlock_irqrestore(&rpc->e_lock, flags); + if (!kfifo_put(&rpc->aer_fifo, e_src)) return IRQ_HANDLED; - } - rpc->e_sources[rpc->prod_idx].status = status; - rpc->e_sources[rpc->prod_idx].id = id; - rpc->prod_idx = next_prod_idx; - spin_unlock_irqrestore(&rpc->e_lock, flags); - - /* Invoke DPC handler */ - schedule_work(&rpc->dpc_handler); - return IRQ_HANDLED; + return IRQ_WAKE_THREAD; } -EXPORT_SYMBOL_GPL(aer_irq); static int set_device_error_reporting(struct pci_dev *dev, void *data) { @@ -1423,33 +1357,6 @@ static void aer_disable_rootport(struct aer_rpc *rpc) } /** - * aer_alloc_rpc - allocate Root Port data structure - * @dev: pointer to the pcie_dev data structure - * - * Invoked when Root Port's AER service is loaded. - */ -static struct aer_rpc *aer_alloc_rpc(struct pcie_device *dev) -{ - struct aer_rpc *rpc; - - rpc = kzalloc(sizeof(struct aer_rpc), GFP_KERNEL); - if (!rpc) - return NULL; - - /* Initialize Root lock access, e_lock, to Root Error Status Reg */ - spin_lock_init(&rpc->e_lock); - - rpc->rpd = dev->port; - INIT_WORK(&rpc->dpc_handler, aer_isr); - mutex_init(&rpc->rpc_mutex); - - /* Use PCIe bus function to store rpc into PCIe device */ - set_service_data(dev, rpc); - - return rpc; -} - -/** * aer_remove - clean up resources * @dev: pointer to the pcie_dev data structure * @@ -1459,16 +1366,7 @@ static void aer_remove(struct pcie_device *dev) { struct aer_rpc *rpc = get_service_data(dev); - if (rpc) { - /* If register interrupt service, it must be free. */ - if (rpc->isr) - free_irq(dev->irq, dev); - - flush_work(&rpc->dpc_handler); - aer_disable_rootport(rpc); - kfree(rpc); - set_service_data(dev, NULL); - } + aer_disable_rootport(rpc); } /** @@ -1481,27 +1379,24 @@ static int aer_probe(struct pcie_device *dev) { int status; struct aer_rpc *rpc; - struct device *device = &dev->port->dev; + struct device *device = &dev->device; - /* Alloc rpc data structure */ - rpc = aer_alloc_rpc(dev); + rpc = devm_kzalloc(device, sizeof(struct aer_rpc), GFP_KERNEL); if (!rpc) { dev_printk(KERN_DEBUG, device, "alloc AER rpc failed\n"); - aer_remove(dev); return -ENOMEM; } + rpc->rpd = dev->port; + set_service_data(dev, rpc); - /* Request IRQ ISR */ - status = request_irq(dev->irq, aer_irq, IRQF_SHARED, "aerdrv", dev); + status = devm_request_threaded_irq(device, dev->irq, aer_irq, aer_isr, + IRQF_SHARED, "aerdrv", dev); if (status) { dev_printk(KERN_DEBUG, device, "request AER IRQ %d failed\n", dev->irq); - aer_remove(dev); return status; } - rpc->isr = 1; - aer_enable_rootport(rpc); dev_info(device, "AER enabled with IRQ %d\n", dev->irq); return 0; @@ -1526,7 +1421,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev) reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK; pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32); - rc = pci_bridge_secondary_bus_reset(dev); + rc = pci_bus_error_reset(dev); pci_printk(KERN_DEBUG, dev, "Root Port link has been reset\n"); /* Clear Root Error Status */ @@ -1541,18 +1436,6 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev) return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED; } -/** - * aer_error_resume - clean up corresponding error status bits - * @dev: pointer to Root Port's pci_dev data structure - * - * Invoked by Port Bus driver during nonfatal recovery. - */ -static void aer_error_resume(struct pci_dev *dev) -{ - pci_aer_clear_device_status(dev); - pci_cleanup_aer_uncorrect_error_status(dev); -} - static struct pcie_port_service_driver aerdriver = { .name = "aer", .port_type = PCI_EXP_TYPE_ROOT_PORT, @@ -1560,7 +1443,6 @@ static struct pcie_port_service_driver aerdriver = { .probe = aer_probe, .remove = aer_remove, - .error_resume = aer_error_resume, .reset_link = aer_root_reset, }; @@ -1569,10 +1451,9 @@ static struct pcie_port_service_driver aerdriver = { * * Invoked when AER root service driver is loaded. */ -static int __init aer_service_init(void) +int __init pcie_aer_init(void) { if (!pci_aer_available() || aer_acpi_firmware_first()) return -ENXIO; return pcie_port_service_register(&aerdriver); } -device_initcall(aer_service_init); diff --git a/drivers/pci/pcie/aer_inject.c b/drivers/pci/pcie/aer_inject.c index 0eb24346cad3..95d4759664b3 100644 --- a/drivers/pci/pcie/aer_inject.c +++ b/drivers/pci/pcie/aer_inject.c @@ -14,6 +14,7 @@ #include <linux/module.h> #include <linux/init.h> +#include <linux/irq.h> #include <linux/miscdevice.h> #include <linux/pci.h> #include <linux/slab.h> @@ -175,14 +176,48 @@ static u32 *find_pci_config_dword(struct aer_error *err, int where, return target; } +static int aer_inj_read(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 *val) +{ + struct pci_ops *ops, *my_ops; + int rv; + + ops = __find_pci_bus_ops(bus); + if (!ops) + return -1; + + my_ops = bus->ops; + bus->ops = ops; + rv = ops->read(bus, devfn, where, size, val); + bus->ops = my_ops; + + return rv; +} + +static int aer_inj_write(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 val) +{ + struct pci_ops *ops, *my_ops; + int rv; + + ops = __find_pci_bus_ops(bus); + if (!ops) + return -1; + + my_ops = bus->ops; + bus->ops = ops; + rv = ops->write(bus, devfn, where, size, val); + bus->ops = my_ops; + + return rv; +} + static int aer_inj_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val) { u32 *sim; struct aer_error *err; unsigned long flags; - struct pci_ops *ops; - struct pci_ops *my_ops; int domain; int rv; @@ -203,18 +238,7 @@ static int aer_inj_read_config(struct pci_bus *bus, unsigned int devfn, return 0; } out: - ops = __find_pci_bus_ops(bus); - /* - * pci_lock must already be held, so we can directly - * manipulate bus->ops. Many config access functions, - * including pci_generic_config_read() require the original - * bus->ops be installed to function, so temporarily put them - * back. - */ - my_ops = bus->ops; - bus->ops = ops; - rv = ops->read(bus, devfn, where, size, val); - bus->ops = my_ops; + rv = aer_inj_read(bus, devfn, where, size, val); spin_unlock_irqrestore(&inject_lock, flags); return rv; } @@ -226,8 +250,6 @@ static int aer_inj_write_config(struct pci_bus *bus, unsigned int devfn, struct aer_error *err; unsigned long flags; int rw1cs; - struct pci_ops *ops; - struct pci_ops *my_ops; int domain; int rv; @@ -251,18 +273,7 @@ static int aer_inj_write_config(struct pci_bus *bus, unsigned int devfn, return 0; } out: - ops = __find_pci_bus_ops(bus); - /* - * pci_lock must already be held, so we can directly - * manipulate bus->ops. Many config access functions, - * including pci_generic_config_write() require the original - * bus->ops be installed to function, so temporarily put them - * back. - */ - my_ops = bus->ops; - bus->ops = ops; - rv = ops->write(bus, devfn, where, size, val); - bus->ops = my_ops; + rv = aer_inj_write(bus, devfn, where, size, val); spin_unlock_irqrestore(&inject_lock, flags); return rv; } @@ -303,32 +314,13 @@ out: return 0; } -static int find_aer_device_iter(struct device *device, void *data) -{ - struct pcie_device **result = data; - struct pcie_device *pcie_dev; - - if (device->bus == &pcie_port_bus_type) { - pcie_dev = to_pcie_device(device); - if (pcie_dev->service & PCIE_PORT_SERVICE_AER) { - *result = pcie_dev; - return 1; - } - } - return 0; -} - -static int find_aer_device(struct pci_dev *dev, struct pcie_device **result) -{ - return device_for_each_child(&dev->dev, result, find_aer_device_iter); -} - static int aer_inject(struct aer_error_inj *einj) { struct aer_error *err, *rperr; struct aer_error *err_alloc = NULL, *rperr_alloc = NULL; struct pci_dev *dev, *rpdev; struct pcie_device *edev; + struct device *device; unsigned long flags; unsigned int devfn = PCI_DEVFN(einj->dev, einj->fn); int pos_cap_err, rp_pos_cap_err; @@ -464,7 +456,9 @@ static int aer_inject(struct aer_error_inj *einj) if (ret) goto out_put; - if (find_aer_device(rpdev, &edev)) { + device = pcie_port_find_device(rpdev, PCIE_PORT_SERVICE_AER); + if (device) { + edev = to_pcie_device(device); if (!get_service_data(edev)) { dev_warn(&edev->device, "aer_inject: AER service is not initialized\n"); @@ -474,7 +468,9 @@ static int aer_inject(struct aer_error_inj *einj) dev_info(&edev->device, "aer_inject: Injecting errors %08x/%08x into device %s\n", einj->cor_status, einj->uncor_status, pci_name(dev)); - aer_irq(-1, edev); + local_irq_disable(); + generic_handle_irq(edev->irq); + local_irq_enable(); } else { pci_err(rpdev, "aer_inject: AER device not found\n"); ret = -ENODEV; diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index f03279fc87cd..e435d12e61a0 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -44,6 +44,58 @@ static const char * const rp_pio_error_string[] = { "Memory Request Completion Timeout", /* Bit Position 18 */ }; +static struct dpc_dev *to_dpc_dev(struct pci_dev *dev) +{ + struct device *device; + + device = pcie_port_find_device(dev, PCIE_PORT_SERVICE_DPC); + if (!device) + return NULL; + return get_service_data(to_pcie_device(device)); +} + +void pci_save_dpc_state(struct pci_dev *dev) +{ + struct dpc_dev *dpc; + struct pci_cap_saved_state *save_state; + u16 *cap; + + if (!pci_is_pcie(dev)) + return; + + dpc = to_dpc_dev(dev); + if (!dpc) + return; + + save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_DPC); + if (!save_state) + return; + + cap = (u16 *)&save_state->cap.data[0]; + pci_read_config_word(dev, dpc->cap_pos + PCI_EXP_DPC_CTL, cap); +} + +void pci_restore_dpc_state(struct pci_dev *dev) +{ + struct dpc_dev *dpc; + struct pci_cap_saved_state *save_state; + u16 *cap; + + if (!pci_is_pcie(dev)) + return; + + dpc = to_dpc_dev(dev); + if (!dpc) + return; + + save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_DPC); + if (!save_state) + return; + + cap = (u16 *)&save_state->cap.data[0]; + pci_write_config_word(dev, dpc->cap_pos + PCI_EXP_DPC_CTL, *cap); +} + static int dpc_wait_rp_inactive(struct dpc_dev *dpc) { unsigned long timeout = jiffies + HZ; @@ -67,18 +119,13 @@ static int dpc_wait_rp_inactive(struct dpc_dev *dpc) static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev) { struct dpc_dev *dpc; - struct pcie_device *pciedev; - struct device *devdpc; - u16 cap; /* * DPC disables the Link automatically in hardware, so it has * already been reset by the time we get here. */ - devdpc = pcie_port_find_device(pdev, PCIE_PORT_SERVICE_DPC); - pciedev = to_pcie_device(devdpc); - dpc = get_service_data(pciedev); + dpc = to_dpc_dev(pdev); cap = dpc->cap_pos; /* @@ -93,10 +140,12 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev) pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS, PCI_EXP_DPC_STATUS_TRIGGER); + if (!pcie_wait_for_link(pdev, true)) + return PCI_ERS_RESULT_DISCONNECT; + return PCI_ERS_RESULT_RECOVERED; } - static void dpc_process_rp_pio_error(struct dpc_dev *dpc) { struct device *dev = &dpc->dev->device; @@ -169,7 +218,7 @@ static irqreturn_t dpc_handler(int irq, void *context) reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN) >> 1; ext_reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN_EXT) >> 5; - dev_warn(dev, "DPC %s detected, remove downstream devices\n", + dev_warn(dev, "DPC %s detected\n", (reason == 0) ? "unmasked uncorrectable error" : (reason == 1) ? "ERR_NONFATAL" : (reason == 2) ? "ERR_FATAL" : @@ -186,7 +235,7 @@ static irqreturn_t dpc_handler(int irq, void *context) } /* We configure DPC so it only triggers on ERR_FATAL */ - pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC); + pcie_do_recovery(pdev, pci_channel_io_frozen, PCIE_PORT_SERVICE_DPC); return IRQ_HANDLED; } @@ -259,6 +308,8 @@ static int dpc_probe(struct pcie_device *dev) FLAG(cap, PCI_EXP_DPC_CAP_POISONED_TLP), FLAG(cap, PCI_EXP_DPC_CAP_SW_TRIGGER), dpc->rp_log_size, FLAG(cap, PCI_EXP_DPC_CAP_DL_ACTIVE)); + + pci_add_ext_cap_save_buffer(pdev, PCI_EXT_CAP_ID_DPC, sizeof(u16)); return status; } @@ -282,8 +333,7 @@ static struct pcie_port_service_driver dpcdriver = { .reset_link = dpc_reset_link, }; -static int __init dpc_service_init(void) +int __init pcie_dpc_init(void) { return pcie_port_service_register(&dpcdriver); } -device_initcall(dpc_service_init); diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index 708fd3a0d646..773197a12568 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -12,18 +12,12 @@ #include <linux/pci.h> #include <linux/module.h> -#include <linux/pci.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/aer.h> #include "portdrv.h" #include "../pci.h" -struct aer_broadcast_data { - enum pci_channel_state state; - enum pci_ers_result result; -}; - static pci_ers_result_t merge_result(enum pci_ers_result orig, enum pci_ers_result new) { @@ -49,66 +43,52 @@ static pci_ers_result_t merge_result(enum pci_ers_result orig, return orig; } -static int report_error_detected(struct pci_dev *dev, void *data) +static int report_error_detected(struct pci_dev *dev, + enum pci_channel_state state, + enum pci_ers_result *result) { pci_ers_result_t vote; const struct pci_error_handlers *err_handler; - struct aer_broadcast_data *result_data; - - result_data = (struct aer_broadcast_data *) data; device_lock(&dev->dev); - dev->error_state = result_data->state; - - if (!dev->driver || + if (!pci_dev_set_io_state(dev, state) || + !dev->driver || !dev->driver->err_handler || !dev->driver->err_handler->error_detected) { - if (result_data->state == pci_channel_io_frozen && - dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) { - /* - * In case of fatal recovery, if one of down- - * stream device has no driver. We might be - * unable to recover because a later insmod - * of a driver for this device is unaware of - * its hw state. - */ - pci_printk(KERN_DEBUG, dev, "device has %s\n", - dev->driver ? - "no AER-aware driver" : "no driver"); - } - /* - * If there's any device in the subtree that does not - * have an error_detected callback, returning - * PCI_ERS_RESULT_NO_AER_DRIVER prevents calling of - * the subsequent mmio_enabled/slot_reset/resume - * callbacks of "any" device in the subtree. All the - * devices in the subtree are left in the error state - * without recovery. + * If any device in the subtree does not have an error_detected + * callback, PCI_ERS_RESULT_NO_AER_DRIVER prevents subsequent + * error callbacks of "any" device in the subtree, and will + * exit in the disconnected error state. */ - if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) vote = PCI_ERS_RESULT_NO_AER_DRIVER; else vote = PCI_ERS_RESULT_NONE; } else { err_handler = dev->driver->err_handler; - vote = err_handler->error_detected(dev, result_data->state); - pci_uevent_ers(dev, PCI_ERS_RESULT_NONE); + vote = err_handler->error_detected(dev, state); } - - result_data->result = merge_result(result_data->result, vote); + pci_uevent_ers(dev, vote); + *result = merge_result(*result, vote); device_unlock(&dev->dev); return 0; } +static int report_frozen_detected(struct pci_dev *dev, void *data) +{ + return report_error_detected(dev, pci_channel_io_frozen, data); +} + +static int report_normal_detected(struct pci_dev *dev, void *data) +{ + return report_error_detected(dev, pci_channel_io_normal, data); +} + static int report_mmio_enabled(struct pci_dev *dev, void *data) { - pci_ers_result_t vote; + pci_ers_result_t vote, *result = data; const struct pci_error_handlers *err_handler; - struct aer_broadcast_data *result_data; - - result_data = (struct aer_broadcast_data *) data; device_lock(&dev->dev); if (!dev->driver || @@ -118,7 +98,7 @@ static int report_mmio_enabled(struct pci_dev *dev, void *data) err_handler = dev->driver->err_handler; vote = err_handler->mmio_enabled(dev); - result_data->result = merge_result(result_data->result, vote); + *result = merge_result(*result, vote); out: device_unlock(&dev->dev); return 0; @@ -126,11 +106,8 @@ out: static int report_slot_reset(struct pci_dev *dev, void *data) { - pci_ers_result_t vote; + pci_ers_result_t vote, *result = data; const struct pci_error_handlers *err_handler; - struct aer_broadcast_data *result_data; - - result_data = (struct aer_broadcast_data *) data; device_lock(&dev->dev); if (!dev->driver || @@ -140,7 +117,7 @@ static int report_slot_reset(struct pci_dev *dev, void *data) err_handler = dev->driver->err_handler; vote = err_handler->slot_reset(dev); - result_data->result = merge_result(result_data->result, vote); + *result = merge_result(*result, vote); out: device_unlock(&dev->dev); return 0; @@ -151,17 +128,16 @@ static int report_resume(struct pci_dev *dev, void *data) const struct pci_error_handlers *err_handler; device_lock(&dev->dev); - dev->error_state = pci_channel_io_normal; - - if (!dev->driver || + if (!pci_dev_set_io_state(dev, pci_channel_io_normal) || + !dev->driver || !dev->driver->err_handler || !dev->driver->err_handler->resume) goto out; err_handler = dev->driver->err_handler; err_handler->resume(dev); - pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED); out: + pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED); device_unlock(&dev->dev); return 0; } @@ -177,207 +153,86 @@ static pci_ers_result_t default_reset_link(struct pci_dev *dev) { int rc; - rc = pci_bridge_secondary_bus_reset(dev); + rc = pci_bus_error_reset(dev); pci_printk(KERN_DEBUG, dev, "downstream link has been reset\n"); return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED; } static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service) { - struct pci_dev *udev; pci_ers_result_t status; struct pcie_port_service_driver *driver = NULL; - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { - /* Reset this port for all subordinates */ - udev = dev; - } else { - /* Reset the upstream component (likely downstream port) */ - udev = dev->bus->self; - } - - /* Use the aer driver of the component firstly */ - driver = pcie_port_find_service(udev, service); - + driver = pcie_port_find_service(dev, service); if (driver && driver->reset_link) { - status = driver->reset_link(udev); - } else if (udev->has_secondary_link) { - status = default_reset_link(udev); + status = driver->reset_link(dev); + } else if (dev->has_secondary_link) { + status = default_reset_link(dev); } else { pci_printk(KERN_DEBUG, dev, "no link-reset support at upstream device %s\n", - pci_name(udev)); + pci_name(dev)); return PCI_ERS_RESULT_DISCONNECT; } if (status != PCI_ERS_RESULT_RECOVERED) { pci_printk(KERN_DEBUG, dev, "link reset at upstream device %s failed\n", - pci_name(udev)); + pci_name(dev)); return PCI_ERS_RESULT_DISCONNECT; } return status; } -/** - * broadcast_error_message - handle message broadcast to downstream drivers - * @dev: pointer to from where in a hierarchy message is broadcasted down - * @state: error state - * @error_mesg: message to print - * @cb: callback to be broadcasted - * - * Invoked during error recovery process. Once being invoked, the content - * of error severity will be broadcasted to all downstream drivers in a - * hierarchy in question. - */ -static pci_ers_result_t broadcast_error_message(struct pci_dev *dev, - enum pci_channel_state state, - char *error_mesg, - int (*cb)(struct pci_dev *, void *)) -{ - struct aer_broadcast_data result_data; - - pci_printk(KERN_DEBUG, dev, "broadcast %s message\n", error_mesg); - result_data.state = state; - if (cb == report_error_detected) - result_data.result = PCI_ERS_RESULT_CAN_RECOVER; - else - result_data.result = PCI_ERS_RESULT_RECOVERED; - - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { - /* - * If the error is reported by a bridge, we think this error - * is related to the downstream link of the bridge, so we - * do error recovery on all subordinates of the bridge instead - * of the bridge and clear the error status of the bridge. - */ - if (cb == report_error_detected) - dev->error_state = state; - pci_walk_bus(dev->subordinate, cb, &result_data); - if (cb == report_resume) { - pci_aer_clear_device_status(dev); - pci_cleanup_aer_uncorrect_error_status(dev); - dev->error_state = pci_channel_io_normal; - } - } else { - /* - * If the error is reported by an end point, we think this - * error is related to the upstream link of the end point. - * The error is non fatal so the bus is ok; just invoke - * the callback for the function that logged the error. - */ - cb(dev, &result_data); - } - - return result_data.result; -} - -/** - * pcie_do_fatal_recovery - handle fatal error recovery process - * @dev: pointer to a pci_dev data structure of agent detecting an error - * - * Invoked when an error is fatal. Once being invoked, removes the devices - * beneath this AER agent, followed by reset link e.g. secondary bus reset - * followed by re-enumeration of devices. - */ -void pcie_do_fatal_recovery(struct pci_dev *dev, u32 service) +void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, + u32 service) { - struct pci_dev *udev; - struct pci_bus *parent; - struct pci_dev *pdev, *temp; - pci_ers_result_t result; - - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) - udev = dev; + pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER; + struct pci_bus *bus; + + /* + * Error recovery runs on all subordinates of the first downstream port. + * If the downstream port detected the error, it is cleared at the end. + */ + if (!(pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || + pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM)) + dev = dev->bus->self; + bus = dev->subordinate; + + pci_dbg(dev, "broadcast error_detected message\n"); + if (state == pci_channel_io_frozen) + pci_walk_bus(bus, report_frozen_detected, &status); else - udev = dev->bus->self; - - parent = udev->subordinate; - pci_lock_rescan_remove(); - pci_dev_get(dev); - list_for_each_entry_safe_reverse(pdev, temp, &parent->devices, - bus_list) { - pci_dev_get(pdev); - pci_dev_set_disconnected(pdev, NULL); - if (pci_has_subordinate(pdev)) - pci_walk_bus(pdev->subordinate, - pci_dev_set_disconnected, NULL); - pci_stop_and_remove_bus_device(pdev); - pci_dev_put(pdev); - } - - result = reset_link(udev, service); + pci_walk_bus(bus, report_normal_detected, &status); - if ((service == PCIE_PORT_SERVICE_AER) && - (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) { - /* - * If the error is reported by a bridge, we think this error - * is related to the downstream link of the bridge, so we - * do error recovery on all subordinates of the bridge instead - * of the bridge and clear the error status of the bridge. - */ - pci_aer_clear_fatal_status(dev); - pci_aer_clear_device_status(dev); - } + if (state == pci_channel_io_frozen && + reset_link(dev, service) != PCI_ERS_RESULT_RECOVERED) + goto failed; - if (result == PCI_ERS_RESULT_RECOVERED) { - if (pcie_wait_for_link(udev, true)) - pci_rescan_bus(udev->bus); - pci_info(dev, "Device recovery from fatal error successful\n"); - } else { - pci_uevent_ers(dev, PCI_ERS_RESULT_DISCONNECT); - pci_info(dev, "Device recovery from fatal error failed\n"); + if (status == PCI_ERS_RESULT_CAN_RECOVER) { + status = PCI_ERS_RESULT_RECOVERED; + pci_dbg(dev, "broadcast mmio_enabled message\n"); + pci_walk_bus(bus, report_mmio_enabled, &status); } - pci_dev_put(dev); - pci_unlock_rescan_remove(); -} - -/** - * pcie_do_nonfatal_recovery - handle nonfatal error recovery process - * @dev: pointer to a pci_dev data structure of agent detecting an error - * - * Invoked when an error is nonfatal/fatal. Once being invoked, broadcast - * error detected message to all downstream drivers within a hierarchy in - * question and return the returned code. - */ -void pcie_do_nonfatal_recovery(struct pci_dev *dev) -{ - pci_ers_result_t status; - enum pci_channel_state state; - - state = pci_channel_io_normal; - - status = broadcast_error_message(dev, - state, - "error_detected", - report_error_detected); - - if (status == PCI_ERS_RESULT_CAN_RECOVER) - status = broadcast_error_message(dev, - state, - "mmio_enabled", - report_mmio_enabled); - if (status == PCI_ERS_RESULT_NEED_RESET) { /* * TODO: Should call platform-specific * functions to reset slot before calling * drivers' slot_reset callbacks? */ - status = broadcast_error_message(dev, - state, - "slot_reset", - report_slot_reset); + status = PCI_ERS_RESULT_RECOVERED; + pci_dbg(dev, "broadcast slot_reset message\n"); + pci_walk_bus(bus, report_slot_reset, &status); } if (status != PCI_ERS_RESULT_RECOVERED) goto failed; - broadcast_error_message(dev, - state, - "resume", - report_resume); + pci_dbg(dev, "broadcast resume message\n"); + pci_walk_bus(bus, report_resume, &status); + pci_aer_clear_device_status(dev); + pci_cleanup_aer_uncorrect_error_status(dev); pci_info(dev, "AER: Device recovery successful\n"); return; diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c index 3ed67676ea2a..0dbcf429089f 100644 --- a/drivers/pci/pcie/pme.c +++ b/drivers/pci/pcie/pme.c @@ -432,6 +432,31 @@ static void pcie_pme_remove(struct pcie_device *srv) kfree(get_service_data(srv)); } +static int pcie_pme_runtime_suspend(struct pcie_device *srv) +{ + struct pcie_pme_service_data *data = get_service_data(srv); + + spin_lock_irq(&data->lock); + pcie_pme_interrupt_enable(srv->port, false); + pcie_clear_root_pme_status(srv->port); + data->noirq = true; + spin_unlock_irq(&data->lock); + + return 0; +} + +static int pcie_pme_runtime_resume(struct pcie_device *srv) +{ + struct pcie_pme_service_data *data = get_service_data(srv); + + spin_lock_irq(&data->lock); + pcie_pme_interrupt_enable(srv->port, true); + data->noirq = false; + spin_unlock_irq(&data->lock); + + return 0; +} + static struct pcie_port_service_driver pcie_pme_driver = { .name = "pcie_pme", .port_type = PCI_EXP_TYPE_ROOT_PORT, @@ -439,6 +464,8 @@ static struct pcie_port_service_driver pcie_pme_driver = { .probe = pcie_pme_probe, .suspend = pcie_pme_suspend, + .runtime_suspend = pcie_pme_runtime_suspend, + .runtime_resume = pcie_pme_runtime_resume, .resume = pcie_pme_resume, .remove = pcie_pme_remove, }; @@ -446,8 +473,7 @@ static struct pcie_port_service_driver pcie_pme_driver = { /** * pcie_pme_service_init - Register the PCIe PME service driver. */ -static int __init pcie_pme_service_init(void) +int __init pcie_pme_init(void) { return pcie_port_service_register(&pcie_pme_driver); } -device_initcall(pcie_pme_service_init); diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h index d59afa42fc14..e495f04394d0 100644 --- a/drivers/pci/pcie/portdrv.h +++ b/drivers/pci/pcie/portdrv.h @@ -23,6 +23,30 @@ #define PCIE_PORT_DEVICE_MAXSERVICES 4 +#ifdef CONFIG_PCIEAER +int pcie_aer_init(void); +#else +static inline int pcie_aer_init(void) { return 0; } +#endif + +#ifdef CONFIG_HOTPLUG_PCI_PCIE +int pcie_hp_init(void); +#else +static inline int pcie_hp_init(void) { return 0; } +#endif + +#ifdef CONFIG_PCIE_PME +int pcie_pme_init(void); +#else +static inline int pcie_pme_init(void) { return 0; } +#endif + +#ifdef CONFIG_PCIE_DPC +int pcie_dpc_init(void); +#else +static inline int pcie_dpc_init(void) { return 0; } +#endif + /* Port Type */ #define PCIE_ANY_PORT (~0) @@ -52,6 +76,8 @@ struct pcie_port_service_driver { int (*suspend) (struct pcie_device *dev); int (*resume_noirq) (struct pcie_device *dev); int (*resume) (struct pcie_device *dev); + int (*runtime_suspend) (struct pcie_device *dev); + int (*runtime_resume) (struct pcie_device *dev); /* Device driver may resume normal operations */ void (*error_resume)(struct pci_dev *dev); @@ -85,6 +111,8 @@ int pcie_port_device_register(struct pci_dev *dev); int pcie_port_device_suspend(struct device *dev); int pcie_port_device_resume_noirq(struct device *dev); int pcie_port_device_resume(struct device *dev); +int pcie_port_device_runtime_suspend(struct device *dev); +int pcie_port_device_runtime_resume(struct device *dev); #endif void pcie_port_device_remove(struct pci_dev *dev); int __must_check pcie_port_bus_register(void); @@ -123,10 +151,6 @@ static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev) } #endif -#ifdef CONFIG_PCIEAER -irqreturn_t aer_irq(int irq, void *context); -#endif - struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev, u32 service); struct device *pcie_port_find_device(struct pci_dev *dev, u32 service); diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 7c37d815229e..f458ac9cb70c 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -395,6 +395,26 @@ int pcie_port_device_resume(struct device *dev) size_t off = offsetof(struct pcie_port_service_driver, resume); return device_for_each_child(dev, &off, pm_iter); } + +/** + * pcie_port_device_runtime_suspend - runtime suspend port services + * @dev: PCI Express port to handle + */ +int pcie_port_device_runtime_suspend(struct device *dev) +{ + size_t off = offsetof(struct pcie_port_service_driver, runtime_suspend); + return device_for_each_child(dev, &off, pm_iter); +} + +/** + * pcie_port_device_runtime_resume - runtime resume port services + * @dev: PCI Express port to handle + */ +int pcie_port_device_runtime_resume(struct device *dev) +{ + size_t off = offsetof(struct pcie_port_service_driver, runtime_resume); + return device_for_each_child(dev, &off, pm_iter); +} #endif /* PM */ static int remove_iter(struct device *dev, void *data) @@ -466,6 +486,7 @@ struct device *pcie_port_find_device(struct pci_dev *dev, device = pdrvs.dev; return device; } +EXPORT_SYMBOL_GPL(pcie_port_find_device); /** * pcie_port_device_remove - unregister PCI Express port service devices diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index eef22dc29140..0acca3596807 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -45,12 +45,10 @@ __setup("pcie_ports=", pcie_port_setup); #ifdef CONFIG_PM static int pcie_port_runtime_suspend(struct device *dev) { - return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY; -} + if (!to_pci_dev(dev)->bridge_d3) + return -EBUSY; -static int pcie_port_runtime_resume(struct device *dev) -{ - return 0; + return pcie_port_device_runtime_suspend(dev); } static int pcie_port_runtime_idle(struct device *dev) @@ -73,7 +71,7 @@ static const struct dev_pm_ops pcie_portdrv_pm_ops = { .restore_noirq = pcie_port_device_resume_noirq, .restore = pcie_port_device_resume, .runtime_suspend = pcie_port_runtime_suspend, - .runtime_resume = pcie_port_runtime_resume, + .runtime_resume = pcie_port_device_runtime_resume, .runtime_idle = pcie_port_runtime_idle, }; @@ -109,8 +107,8 @@ static int pcie_portdrv_probe(struct pci_dev *dev, pci_save_state(dev); - dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_SMART_SUSPEND | - DPM_FLAG_LEAVE_SUSPENDED); + dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NEVER_SKIP | + DPM_FLAG_SMART_SUSPEND); if (pci_bridge_d3_possible(dev)) { /* @@ -146,6 +144,13 @@ static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, return PCI_ERS_RESULT_CAN_RECOVER; } +static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) +{ + pci_restore_state(dev); + pci_save_state(dev); + return PCI_ERS_RESULT_RECOVERED; +} + static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) { return PCI_ERS_RESULT_RECOVERED; @@ -185,6 +190,7 @@ static const struct pci_device_id port_pci_ids[] = { { static const struct pci_error_handlers pcie_portdrv_err_handler = { .error_detected = pcie_portdrv_error_detected, + .slot_reset = pcie_portdrv_slot_reset, .mmio_enabled = pcie_portdrv_mmio_enabled, .resume = pcie_portdrv_err_resume, }; @@ -226,11 +232,20 @@ static const struct dmi_system_id pcie_portdrv_dmi_table[] __initconst = { {} }; +static void __init pcie_init_services(void) +{ + pcie_aer_init(); + pcie_pme_init(); + pcie_dpc_init(); + pcie_hp_init(); +} + static int __init pcie_portdrv_init(void) { if (pcie_ports_disabled) return -EACCES; + pcie_init_services(); dmi_check_system(pcie_portdrv_dmi_table); return pci_register_driver(&pcie_portdriver); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 201f9e5ff55c..bb2999d1b199 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -713,6 +713,7 @@ static void pci_set_bus_speed(struct pci_bus *bus) pcie_capability_read_dword(bridge, PCI_EXP_LNKCAP, &linkcap); bus->max_bus_speed = pcie_link_speed[linkcap & PCI_EXP_LNKCAP_SLS]; + bridge->link_active_reporting = !!(linkcap & PCI_EXP_LNKCAP_DLLLARC); pcie_capability_read_word(bridge, PCI_EXP_LNKSTA, &linksta); pcie_update_link_speed(bus, linksta); diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 79b1824e83b4..ed960436df5e 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -811,6 +811,8 @@ static struct resource *find_free_bus_resource(struct pci_bus *bus, static resource_size_t calculate_iosize(resource_size_t size, resource_size_t min_size, resource_size_t size1, + resource_size_t add_size, + resource_size_t children_add_size, resource_size_t old_size, resource_size_t align) { @@ -823,15 +825,18 @@ static resource_size_t calculate_iosize(resource_size_t size, #if defined(CONFIG_ISA) || defined(CONFIG_EISA) size = (size & 0xff) + ((size & ~0xffUL) << 2); #endif - size = ALIGN(size + size1, align); + size = size + size1; if (size < old_size) size = old_size; + + size = ALIGN(max(size, add_size) + children_add_size, align); return size; } static resource_size_t calculate_memsize(resource_size_t size, resource_size_t min_size, - resource_size_t size1, + resource_size_t add_size, + resource_size_t children_add_size, resource_size_t old_size, resource_size_t align) { @@ -841,7 +846,8 @@ static resource_size_t calculate_memsize(resource_size_t size, old_size = 0; if (size < old_size) size = old_size; - size = ALIGN(size + size1, align); + + size = ALIGN(max(size, add_size) + children_add_size, align); return size; } @@ -930,12 +936,10 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, } } - size0 = calculate_iosize(size, min_size, size1, + size0 = calculate_iosize(size, min_size, size1, 0, 0, resource_size(b_res), min_align); - if (children_add_size > add_size) - add_size = children_add_size; - size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : - calculate_iosize(size, min_size, add_size + size1, + size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 : + calculate_iosize(size, min_size, size1, add_size, children_add_size, resource_size(b_res), min_align); if (!size0 && !size1) { if (b_res->start || b_res->end) @@ -1079,12 +1083,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, min_align = calculate_mem_align(aligns, max_order); min_align = max(min_align, window_alignment(bus, b_res->flags)); - size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); + size0 = calculate_memsize(size, min_size, 0, 0, resource_size(b_res), min_align); add_align = max(min_align, add_align); - if (children_add_size > add_size) - add_size = children_add_size; - size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : - calculate_memsize(size, min_size, add_size, + size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 : + calculate_memsize(size, min_size, add_size, children_add_size, resource_size(b_res), add_align); if (!size0 && !size1) { if (b_res->start || b_res->end) diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c index e634229ece89..c46d5e1ff536 100644 --- a/drivers/pci/slot.c +++ b/drivers/pci/slot.c @@ -14,7 +14,6 @@ struct kset *pci_slots_kset; EXPORT_SYMBOL_GPL(pci_slots_kset); -static DEFINE_MUTEX(pci_slot_mutex); static ssize_t pci_slot_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) @@ -371,7 +370,7 @@ void pci_hp_create_module_link(struct pci_slot *pci_slot) if (!slot || !slot->ops) return; - kobj = kset_find_obj(module_kset, slot->ops->mod_name); + kobj = kset_find_obj(module_kset, slot->mod_name); if (!kobj) return; ret = sysfs_create_link(&pci_slot->kobj, kobj, "module"); |