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Merge branch 'pci/hotplug'

Browse source 
- 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
This commit is contained in:
Bjorn Helgaas 2018-10-20 11:45:29 -05:00
commit 20634dc361
84 changed files with 1382 additions and 1746 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
Documentation/PCI/pci-error-recovery.txt
View file

@ -110,7 +110,7 @@ The actual steps taken by a platform to recover from a PCI error
event will be platform-dependent, but will follow the general
sequence described below.
STEP 0: Error Event: ERR_NONFATAL
STEP 0: Error Event
-------------------
A PCI bus error is detected by the PCI hardware. On powerpc, the slot
is isolated, in that all I/O is blocked: all reads return 0xffffffff,
@ -228,7 +228,13 @@ proceeds to either STEP3 (Link Reset) or to STEP 5 (Resume Operations).
If any driver returned PCI_ERS_RESULT_NEED_RESET, then the platform
proceeds to STEP 4 (Slot Reset)
STEP 3: Slot Reset
STEP 3: Link Reset
------------------
The platform resets the link. This is a PCI-Express specific step
and is done whenever a fatal error has been detected that can be
"solved" by resetting the link.
STEP 4: Slot Reset
------------------
In response to a return value of PCI_ERS_RESULT_NEED_RESET, the
@ -314,7 +320,7 @@ Failure).
>>> However, it probably should.
STEP 4: Resume Operations
STEP 5: Resume Operations
-------------------------
The platform will call the resume() callback on all affected device
drivers if all drivers on the segment have returned
@ -326,7 +332,7 @@ a result code.
At this point, if a new error happens, the platform will restart
a new error recovery sequence.
STEP 5: Permanent Failure
STEP 6: Permanent Failure
-------------------------
A "permanent failure" has occurred, and the platform cannot recover
the device. The platform will call error_detected() with a
@ -349,27 +355,6 @@ errors. See the discussion in powerpc/eeh-pci-error-recovery.txt
for additional detail on real-life experience of the causes of
software errors.
STEP 0: Error Event: ERR_FATAL
-------------------
PCI bus error is detected by the PCI hardware. On powerpc, the slot is
isolated, in that all I/O is blocked: all reads return 0xffffffff, all
writes are ignored.
STEP 1: Remove devices
--------------------
Platform removes the devices depending on the error agent, it could be
this port for all subordinates or upstream component (likely downstream
port)
STEP 2: Reset link
--------------------
The platform resets the link. This is a PCI-Express specific step and is
done whenever a fatal error has been detected that can be "solved" by
resetting the link.
STEP 3: Re-enumerate the devices
--------------------
Initiates the re-enumeration.
Conclusion; General Remarks
---------------------------

2
arch/powerpc/include/asm/pnv-pci.h
View file

@ -54,7 +54,6 @@ void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs,
struct pnv_php_slot {
struct hotplug_slot slot;
struct hotplug_slot_info slot_info;
uint64_t id;
char *name;
int slot_no;
@ -72,6 +71,7 @@ struct pnv_php_slot {
struct pci_dev *pdev;
struct pci_bus *bus;
bool power_state_check;
u8 attention_state;
void *fdt;
void *dt;
struct of_changeset ocs;

97
drivers/acpi/property.c
View file

@ -24,11 +24,15 @@ static int acpi_data_get_property_array(const struct acpi_device_data *data,
acpi_object_type type,
const union acpi_object **obj);
/* ACPI _DSD device properties GUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */
static const guid_t prp_guid =
static const guid_t prp_guids[] = {
/* ACPI _DSD device properties GUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301 */
GUID_INIT(0xdaffd814, 0x6eba, 0x4d8c,
0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01);
/* ACPI _DSD data subnodes GUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */
0x8a, 0x91, 0xbc, 0x9b, 0xbf, 0x4a, 0xa3, 0x01),
/* Hotplug in D3 GUID: 6211e2c0-58a3-4af3-90e1-927a4e0c55a4 */
GUID_INIT(0x6211e2c0, 0x58a3, 0x4af3,
0x90, 0xe1, 0x92, 0x7a, 0x4e, 0x0c, 0x55, 0xa4),
};
static const guid_t ads_guid =
GUID_INIT(0xdbb8e3e6, 0x5886, 0x4ba6,
0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b);
@ -56,6 +60,7 @@ static bool acpi_nondev_subnode_extract(const union acpi_object *desc,
dn->name = link->package.elements[0].string.pointer;
dn->fwnode.ops = &acpi_data_fwnode_ops;
dn->parent = parent;
INIT_LIST_HEAD(&dn->data.properties);
INIT_LIST_HEAD(&dn->data.subnodes);
result = acpi_extract_properties(desc, &dn->data);
@ -288,6 +293,35 @@ static void acpi_init_of_compatible(struct acpi_device *adev)
adev->flags.of_compatible_ok = 1;
}
static bool acpi_is_property_guid(const guid_t *guid)
{
int i;
for (i = 0; i < ARRAY_SIZE(prp_guids); i++) {
if (guid_equal(guid, &prp_guids[i]))
return true;
}
return false;
}
struct acpi_device_properties *
acpi_data_add_props(struct acpi_device_data *data, const guid_t *guid,
const union acpi_object *properties)
{
struct acpi_device_properties *props;
props = kzalloc(sizeof(*props), GFP_KERNEL);
if (props) {
INIT_LIST_HEAD(&props->list);
props->guid = guid;
props->properties = properties;
list_add_tail(&props->list, &data->properties);
}
return props;
}
static bool acpi_extract_properties(const union acpi_object *desc,
struct acpi_device_data *data)
{
@ -312,7 +346,7 @@ static bool acpi_extract_properties(const union acpi_object *desc,
properties->type != ACPI_TYPE_PACKAGE)
break;
if (!guid_equal((guid_t *)guid->buffer.pointer, &prp_guid))
if (!acpi_is_property_guid((guid_t *)guid->buffer.pointer))
continue;
/*
@ -320,13 +354,13 @@ static bool acpi_extract_properties(const union acpi_object *desc,
* package immediately following it.
*/
if (!acpi_properties_format_valid(properties))
break;
continue;
data->properties = properties;
return true;
acpi_data_add_props(data, (const guid_t *)guid->buffer.pointer,
properties);
}
return false;
return !list_empty(&data->properties);
}
void acpi_init_properties(struct acpi_device *adev)
@ -336,6 +370,7 @@ void acpi_init_properties(struct acpi_device *adev)
acpi_status status;
bool acpi_of = false;
INIT_LIST_HEAD(&adev->data.properties);
INIT_LIST_HEAD(&adev->data.subnodes);
if (!adev->handle)
@ -398,11 +433,16 @@ static void acpi_destroy_nondev_subnodes(struct list_head *list)
void acpi_free_properties(struct acpi_device *adev)
{
struct acpi_device_properties *props, *tmp;
acpi_destroy_nondev_subnodes(&adev->data.subnodes);
ACPI_FREE((void *)adev->data.pointer);
adev->data.of_compatible = NULL;
adev->data.pointer = NULL;
adev->data.properties = NULL;
list_for_each_entry_safe(props, tmp, &adev->data.properties, list) {
list_del(&props->list);
kfree(props);
}
}
/**
@ -427,32 +467,37 @@ static int acpi_data_get_property(const struct acpi_device_data *data,
const char *name, acpi_object_type type,
const union acpi_object **obj)
{
const union acpi_object *properties;
int i;
const struct acpi_device_properties *props;
if (!data || !name)
return -EINVAL;
if (!data->pointer || !data->properties)
if (!data->pointer || list_empty(&data->properties))
return -EINVAL;
properties = data->properties;
for (i = 0; i < properties->package.count; i++) {
const union acpi_object *propname, *propvalue;
const union acpi_object *property;
list_for_each_entry(props, &data->properties, list) {
const union acpi_object *properties;
unsigned int i;
property = &properties->package.elements[i];
properties = props->properties;
for (i = 0; i < properties->package.count; i++) {
const union acpi_object *propname, *propvalue;
const union acpi_object *property;
propname = &property->package.elements[0];
propvalue = &property->package.elements[1];
property = &properties->package.elements[i];
if (!strcmp(name, propname->string.pointer)) {
if (type != ACPI_TYPE_ANY && propvalue->type != type)
return -EPROTO;
if (obj)
*obj = propvalue;
propname = &property->package.elements[0];
propvalue = &property->package.elements[1];
return 0;
if (!strcmp(name, propname->string.pointer)) {
if (type != ACPI_TYPE_ANY &&
propvalue->type != type)
return -EPROTO;
if (obj)
*obj = propvalue;
return 0;
}
}
}
return -EINVAL;

2
drivers/acpi/x86/apple.c
View file

@ -132,8 +132,8 @@ void acpi_extract_apple_properties(struct acpi_device *adev)
}
WARN_ON(free_space != (void *)newprops + newsize);
adev->data.properties = newprops;
adev->data.pointer = newprops;
acpi_data_add_props(&adev->data, &apple_prp_guid, newprops);
out_free:
ACPI_FREE(props);

1
drivers/crypto/qat/qat_common/adf_aer.c
View file

@ -198,7 +198,6 @@ static pci_ers_result_t adf_slot_reset(struct pci_dev *pdev)
pr_err("QAT: Can't find acceleration device\n");
return PCI_ERS_RESULT_DISCONNECT;
}
pci_cleanup_aer_uncorrect_error_status(pdev);
if (adf_dev_aer_schedule_reset(accel_dev, ADF_DEV_RESET_SYNC))
return PCI_ERS_RESULT_DISCONNECT;

7
drivers/dma/ioat/init.c
View file

@ -1252,7 +1252,6 @@ static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev,
static pci_ers_result_t ioat_pcie_error_slot_reset(struct pci_dev *pdev)
{
pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED;
int err;
dev_dbg(&pdev->dev, "%s post reset handling\n", DRV_NAME);
@ -1267,12 +1266,6 @@ static pci_ers_result_t ioat_pcie_error_slot_reset(struct pci_dev *pdev)
pci_wake_from_d3(pdev, false);
}
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
dev_err(&pdev->dev,
"AER uncorrect error status clear failed: %#x\n", err);
}
return result;
}

2
drivers/gpio/gpiolib-acpi.c
View file

@ -1198,7 +1198,7 @@ int acpi_gpio_count(struct device *dev, const char *con_id)
bool acpi_can_fallback_to_crs(struct acpi_device *adev, const char *con_id)
{
/* Never allow fallback if the device has properties */
if (adev->data.properties || adev->driver_gpios)
if (acpi_dev_has_props(adev) || adev->driver_gpios)
return false;
return con_id == NULL;

1
drivers/infiniband/hw/hfi1/pcie.c
View file

@ -650,7 +650,6 @@ pci_resume(struct pci_dev *pdev)
struct hfi1_devdata *dd = pci_get_drvdata(pdev);
dd_dev_info(dd, "HFI1 resume function called\n");
pci_cleanup_aer_uncorrect_error_status(pdev);
/*
* Running jobs will fail, since it's asynchronous
* unlike sysfs-requested reset. Better than

1
drivers/infiniband/hw/qib/qib_pcie.c
View file

@ -597,7 +597,6 @@ qib_pci_resume(struct pci_dev *pdev)
struct qib_devdata *dd = pci_get_drvdata(pdev);
qib_devinfo(pdev, "QIB resume function called\n");
pci_cleanup_aer_uncorrect_error_status(pdev);
/*
* Running jobs will fail, since it's asynchronous
* unlike sysfs-requested reset. Better than

2
drivers/net/ethernet/atheros/alx/main.c
View file

@ -1964,8 +1964,6 @@ static pci_ers_result_t alx_pci_error_slot_reset(struct pci_dev *pdev)
if (!alx_reset_mac(hw))
rc = PCI_ERS_RESULT_RECOVERED;
out:
pci_cleanup_aer_uncorrect_error_status(pdev);
rtnl_unlock();
return rc;

7
drivers/net/ethernet/broadcom/bnx2.c
View file

@ -8793,13 +8793,6 @@ static pci_ers_result_t bnx2_io_slot_reset(struct pci_dev *pdev)
if (!(bp->flags & BNX2_FLAG_AER_ENABLED))
return result;
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
dev_err(&pdev->dev,
"pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
err); /* non-fatal, continue */
}
return result;
}

8
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
View file

@ -14385,14 +14385,6 @@ static pci_ers_result_t bnx2x_io_slot_reset(struct pci_dev *pdev)
rtnl_unlock();
/* If AER, perform cleanup of the PCIe registers */
if (bp->flags & AER_ENABLED) {
if (pci_cleanup_aer_uncorrect_error_status(pdev))
BNX2X_ERR("pci_cleanup_aer_uncorrect_error_status failed\n");
else
DP(NETIF_MSG_HW, "pci_cleanup_aer_uncorrect_error_status succeeded\n");
}
return PCI_ERS_RESULT_RECOVERED;
}

7
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View file

@ -9231,13 +9231,6 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
rtnl_unlock();
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
dev_err(&pdev->dev,
"pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
err); /* non-fatal, continue */
}
return PCI_ERS_RESULT_RECOVERED;
}

1
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View file

@ -4747,7 +4747,6 @@ static pci_ers_result_t eeh_slot_reset(struct pci_dev *pdev)
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
pci_cleanup_aer_uncorrect_error_status(pdev);
if (t4_wait_dev_ready(adap->regs) < 0)
return PCI_ERS_RESULT_DISCONNECT;

1
drivers/net/ethernet/emulex/benet/be_main.c
View file

@ -6151,7 +6151,6 @@ static pci_ers_result_t be_eeh_reset(struct pci_dev *pdev)
if (status)
return PCI_ERS_RESULT_DISCONNECT;
pci_cleanup_aer_uncorrect_error_status(pdev);
be_clear_error(adapter, BE_CLEAR_ALL);
return PCI_ERS_RESULT_RECOVERED;
}

2
drivers/net/ethernet/intel/e1000e/netdev.c
View file

@ -6854,8 +6854,6 @@ static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_RECOVERED;
}
pci_cleanup_aer_uncorrect_error_status(pdev);
return result;
}

2
drivers/net/ethernet/intel/fm10k/fm10k_pci.c
View file

@ -2462,8 +2462,6 @@ static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_RECOVERED;
}
pci_cleanup_aer_uncorrect_error_status(pdev);
return result;
}

9
drivers/net/ethernet/intel/i40e/i40e_main.c
View file

@ -14227,7 +14227,6 @@ static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
{
struct i40e_pf *pf = pci_get_drvdata(pdev);
pci_ers_result_t result;
int err;
u32 reg;
dev_dbg(&pdev->dev, "%s\n", __func__);
@ -14248,14 +14247,6 @@ static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_DISCONNECT;
}
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
dev_info(&pdev->dev,
"pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
err);
/* non-fatal, continue */
}
return result;
}

9
drivers/net/ethernet/intel/igb/igb_main.c
View file

@ -9116,7 +9116,6 @@ static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
pci_ers_result_t result;
int err;
if (pci_enable_device_mem(pdev)) {
dev_err(&pdev->dev,
@ -9140,14 +9139,6 @@ static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_RECOVERED;
}
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
dev_err(&pdev->dev,
"pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
err);
/* non-fatal, continue */
}
return result;
}

10
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -11075,8 +11075,6 @@ static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
/* Free device reference count */
pci_dev_put(vfdev);
}
pci_cleanup_aer_uncorrect_error_status(pdev);
}
/*
@ -11126,7 +11124,6 @@ static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
{
struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
pci_ers_result_t result;
int err;
if (pci_enable_device_mem(pdev)) {
e_err(probe, "Cannot re-enable PCI device after reset.\n");
@ -11146,13 +11143,6 @@ static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
result = PCI_ERS_RESULT_RECOVERED;
}
err = pci_cleanup_aer_uncorrect_error_status(pdev);
if (err) {
e_dev_err("pci_cleanup_aer_uncorrect_error_status "
"failed 0x%0x\n", err);
/* non-fatal, continue */
}
return result;
}

6
drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
View file

@ -1790,11 +1790,6 @@ static pci_ers_result_t netxen_io_slot_reset(struct pci_dev *pdev)
return err ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
static void netxen_io_resume(struct pci_dev *pdev)
{
pci_cleanup_aer_uncorrect_error_status(pdev);
}
static void netxen_nic_shutdown(struct pci_dev *pdev)
{
struct netxen_adapter *adapter = pci_get_drvdata(pdev);
@ -3488,7 +3483,6 @@ netxen_free_ip_list(struct netxen_adapter *adapter, bool master)
static const struct pci_error_handlers netxen_err_handler = {
.error_detected = netxen_io_error_detected,
.slot_reset = netxen_io_slot_reset,
.resume = netxen_io_resume,
};
static struct pci_driver netxen_driver = {

1
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
View file

@ -4232,7 +4232,6 @@ static void qlcnic_83xx_io_resume(struct pci_dev *pdev)
{
struct qlcnic_adapter *adapter = pci_get_drvdata(pdev);
pci_cleanup_aer_uncorrect_error_status(pdev);
if (test_and_clear_bit(__QLCNIC_AER, &adapter->state))
qlcnic_83xx_aer_start_poll_work(adapter);
}

1
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
View file

@ -3975,7 +3975,6 @@ static void qlcnic_82xx_io_resume(struct pci_dev *pdev)
u32 state;
struct qlcnic_adapter *adapter = pci_get_drvdata(pdev);
pci_cleanup_aer_uncorrect_error_status(pdev);
state = QLC_SHARED_REG_RD32(adapter, QLCNIC_CRB_DEV_STATE);
if (state == QLCNIC_DEV_READY && test_and_clear_bit(__QLCNIC_AER,
&adapter->state))

8
drivers/net/ethernet/sfc/efx.c
View file

@ -3847,7 +3847,6 @@ static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev)
{
struct efx_nic *efx = pci_get_drvdata(pdev);
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
int rc;
if (pci_enable_device(pdev)) {
netif_err(efx, hw, efx->net_dev,
@ -3855,13 +3854,6 @@ static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev)
status = PCI_ERS_RESULT_DISCONNECT;
}
rc = pci_cleanup_aer_uncorrect_error_status(pdev);
if (rc) {
netif_err(efx, hw, efx->net_dev,
"pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc);
/* Non-fatal error. Continue. */
}
return status;
}

8
drivers/net/ethernet/sfc/falcon/efx.c
View file

@ -3186,7 +3186,6 @@ static pci_ers_result_t ef4_io_slot_reset(struct pci_dev *pdev)
{
struct ef4_nic *efx = pci_get_drvdata(pdev);
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
int rc;
if (pci_enable_device(pdev)) {
netif_err(efx, hw, efx->net_dev,
@ -3194,13 +3193,6 @@ static pci_ers_result_t ef4_io_slot_reset(struct pci_dev *pdev)
status = PCI_ERS_RESULT_DISCONNECT;
}
rc = pci_cleanup_aer_uncorrect_error_status(pdev);
if (rc) {
netif_err(efx, hw, efx->net_dev,
"pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc);
/* Non-fatal error. Continue. */
}
return status;
}

1
drivers/nvme/host/pci.c
View file

@ -2649,7 +2649,6 @@ static void nvme_error_resume(struct pci_dev *pdev)
struct nvme_dev *dev = pci_get_drvdata(pdev);
flush_work(&dev->ctrl.reset_work);
pci_cleanup_aer_uncorrect_error_status(pdev);
}
static const struct pci_error_handlers nvme_err_handler = {

4
drivers/pci/access.c
View file

@ -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; \

74
drivers/pci/hotplug/TODO Normal file
View file

@ -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.

10
drivers/pci/hotplug/acpiphp.h
View file

@ -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);
}
/*

36
drivers/pci/hotplug/acpiphp_core.c
View file

@ -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);
}

2
drivers/pci/hotplug/acpiphp_ibm.c
View file

@ -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

11
drivers/pci/hotplug/cpci_hotplug.h
View file

@ -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);

105
drivers/pci/hotplug/cpci_hotplug_core.c
View file

@ -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,
@ -67,30 +67,10 @@ static struct hotplug_slot_ops cpci_hotplug_slot_ops = {
.get_latch_status = get_latch_status,
};
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:

6
drivers/pci/hotplug/cpci_hotplug_pci.c
View file

@ -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;
}
}

9
drivers/pci/hotplug/cpqphp.h
View file

@ -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);
}
/*

61
drivers/pci/hotplug/cpqphp_core.c
View file

@ -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:

31
drivers/pci/hotplug/cpqphp_ctrl.c
View file

@ -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;
}

9
drivers/pci/hotplug/ibmphp.h
View file

@ -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

121
drivers/pci/hotplug/ibmphp_core.c
View file

@ -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 @@ static int enable_slot(struct hotplug_slot *hs)
**************************************************************/
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 @@ int ibmphp_do_disable_slot(struct slot *slot_cur)
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,

70
drivers/pci/hotplug/ibmphp_ebda.c
View file

@ -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);

53
drivers/pci/hotplug/pci_hotplug_core.c
View file

@ -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;

131
drivers/pci/hotplug/pciehp.h
View file

@ -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>
@ -59,72 +58,64 @@ 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 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 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 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(slot->hotplug_slot);
return hotplug_slot_name(&ctrl->hotplug_slot);
}
static inline struct controller *to_ctrl(struct hotplug_slot *hotplug_slot)
{
return container_of(hotplug_slot, struct controller, hotplug_slot);
}
#endif /* _PCIEHP_H */

168
drivers/pci/hotplug/pciehp_core.c
View file

@ -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);

263
drivers/pci/hotplug/pciehp_ctrl.c
View file

@ -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;
}

184
drivers/pci/hotplug/pciehp_hpc.c
View file

@ -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)
{
struct pci_dev *pdev = ctrl_dev(slot->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(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);
}

41
drivers/pci/hotplug/pciehp_pci.c
View file

@ -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

38
drivers/pci/hotplug/pnv_php.c
View file

@ -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 @@ static int pnv_php_add_devtree(struct pnv_php_slot *php_slot)
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 @@ static int pnv_php_enable(struct pnv_php_slot *php_slot, bool rescan)
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);

10
drivers/pci/hotplug/rpaphp.h
View file

@ -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 */

20
drivers/pci/hotplug/rpaphp_core.c
View file

@ -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,

11
drivers/pci/hotplug/rpaphp_pci.c
View file

@ -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;
}

22
drivers/pci/hotplug/rpaphp_slot.c
View file

@ -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;

44
drivers/pci/hotplug/s390_pci_hpc.c
View file

@ -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 @@ 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);
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);
}
}

63
drivers/pci/hotplug/sgi_hotplug.c
View file

@ -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 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
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);

8
drivers/pci/hotplug/shpchp.h
View file

@ -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)

48
drivers/pci/hotplug/shpchp_core.c
View file

@ -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;
}

21
drivers/pci/hotplug/shpchp_ctrl.c
View file

@ -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);
}
/*

57
drivers/pci/pci-acpi.c
View file

@ -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)

94
drivers/pci/pci.c
View file

@ -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;
}
@ -5164,6 +5201,41 @@ static int pci_bus_reset(struct pci_bus *bus, int probe)
return ret;
}
/**
* 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

77
drivers/pci/pci.h
View file

@ -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

239
drivers/pci/pcie/aer.c
View file

@ -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;
struct pci_dev *rp = rpc->rpd;
struct aer_err_source e_src = {};
int pos = rp->aer_cap;
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);
/* 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)
{
@ -1422,33 +1356,6 @@ static void aer_disable_rootport(struct aer_rpc *rpc)
pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, reg32);
}
/**
* 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);

96
drivers/pci/pcie/aer_inject.c
View file

@ -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 @@ static int pci_bus_set_aer_ops(struct pci_bus *bus)
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;

72
drivers/pci/pcie/dpc.c
View file

@ -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);

281
drivers/pci/pcie/err.c
View file

@ -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 @@ static int report_mmio_enabled(struct pci_dev *dev, void *data)
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 *))
void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
u32 service)
{
struct aer_broadcast_data result_data;
pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
struct pci_bus *bus;
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;
/*
* 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
result_data.result = PCI_ERS_RESULT_RECOVERED;
pci_walk_bus(bus, report_normal_detected, &status);
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);
if (state == pci_channel_io_frozen &&
reset_link(dev, service) != PCI_ERS_RESULT_RECOVERED)
goto failed;
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);
}
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)
{
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;
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);
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 (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");
}
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;

30
drivers/pci/pcie/pme.c
View file

@ -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);

32
drivers/pci/pcie/portdrv.h
View file

@ -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);

21
drivers/pci/pcie/portdrv_core.c
View file

@ -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

31
drivers/pci/pcie/portdrv_pci.c
View file

@ -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);

1
drivers/pci/probe.c
View file

@ -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);

28
drivers/pci/setup-bus.c
View file

@ -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)

3
drivers/pci/slot.c
View file

@ -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");

39
drivers/platform/x86/asus-wmi.c
View file

@ -254,7 +254,7 @@ struct asus_wmi {
int asus_hwmon_num_fans;
int asus_hwmon_pwm;
struct hotplug_slot *hotplug_slot;
struct hotplug_slot hotplug_slot;
struct mutex hotplug_lock;
struct mutex wmi_lock;
struct workqueue_struct *hotplug_workqueue;
@ -753,7 +753,7 @@ static void asus_rfkill_hotplug(struct asus_wmi *asus)
if (asus->wlan.rfkill)
rfkill_set_sw_state(asus->wlan.rfkill, blocked);
if (asus->hotplug_slot) {
if (asus->hotplug_slot.ops) {
bus = pci_find_bus(0, 1);
if (!bus) {
pr_warn("Unable to find PCI bus 1?\n");
@ -858,7 +858,8 @@ static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
u8 *value)
{
struct asus_wmi *asus = hotplug_slot->private;
struct asus_wmi *asus = container_of(hotplug_slot,
struct asus_wmi, hotplug_slot);
int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
if (result < 0)
@ -868,8 +869,7 @@ static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
return 0;
}
static struct hotplug_slot_ops asus_hotplug_slot_ops = {
.owner = THIS_MODULE,
static const struct hotplug_slot_ops asus_hotplug_slot_ops = {
.get_adapter_status = asus_get_adapter_status,
.get_power_status = asus_get_adapter_status,
};
@ -899,21 +899,9 @@ static int asus_setup_pci_hotplug(struct asus_wmi *asus)
INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
if (!asus->hotplug_slot)
goto error_slot;
asus->hotplug_slot.ops = &asus_hotplug_slot_ops;
asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
GFP_KERNEL);
if (!asus->hotplug_slot->info)
goto error_info;
asus->hotplug_slot->private = asus;
asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
asus_get_adapter_status(asus->hotplug_slot,
&asus->hotplug_slot->info->adapter_status);
ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
ret = pci_hp_register(&asus->hotplug_slot, bus, 0, "asus-wifi");
if (ret) {
pr_err("Unable to register hotplug slot - %d\n", ret);
goto error_register;
@ -922,11 +910,7 @@ static int asus_setup_pci_hotplug(struct asus_wmi *asus)
return 0;
error_register:
kfree(asus->hotplug_slot->info);
error_info:
kfree(asus->hotplug_slot);
asus->hotplug_slot = NULL;
error_slot:
asus->hotplug_slot.ops = NULL;
destroy_workqueue(asus->hotplug_workqueue);
error_workqueue:
return ret;
@ -1054,11 +1038,8 @@ static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
* asus_unregister_rfkill_notifier()
*/
asus_rfkill_hotplug(asus);
if (asus->hotplug_slot) {
pci_hp_deregister(asus->hotplug_slot);
kfree(asus->hotplug_slot->info);
kfree(asus->hotplug_slot);
}
if (asus->hotplug_slot.ops)
pci_hp_deregister(&asus->hotplug_slot);
if (asus->hotplug_workqueue)
destroy_workqueue(asus->hotplug_workqueue);

43
drivers/platform/x86/eeepc-laptop.c
View file

@ -177,7 +177,7 @@ struct eeepc_laptop {
struct rfkill *wwan3g_rfkill;
struct rfkill *wimax_rfkill;
struct hotplug_slot *hotplug_slot;
struct hotplug_slot hotplug_slot;
struct mutex hotplug_lock;
struct led_classdev tpd_led;
@ -582,7 +582,7 @@ static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
mutex_lock(&eeepc->hotplug_lock);
pci_lock_rescan_remove();
if (!eeepc->hotplug_slot)
if (!eeepc->hotplug_slot.ops)
goto out_unlock;
port = acpi_get_pci_dev(handle);
@ -715,8 +715,11 @@ static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
u8 *value)
{
struct eeepc_laptop *eeepc = hotplug_slot->private;
int val = get_acpi(eeepc, CM_ASL_WLAN);
struct eeepc_laptop *eeepc;
int val;
eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot);
val = get_acpi(eeepc, CM_ASL_WLAN);
if (val == 1 || val == 0)
*value = val;
@ -726,8 +729,7 @@ static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
return 0;
}
static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
.owner = THIS_MODULE,
static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
.get_adapter_status = eeepc_get_adapter_status,
.get_power_status = eeepc_get_adapter_status,
};
@ -742,21 +744,9 @@ static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
return -ENODEV;
}
eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
if (!eeepc->hotplug_slot)
goto error_slot;
eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops;
eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
GFP_KERNEL);
if (!eeepc->hotplug_slot->info)
goto error_info;
eeepc->hotplug_slot->private = eeepc;
eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
eeepc_get_adapter_status(eeepc->hotplug_slot,
&eeepc->hotplug_slot->info->adapter_status);
ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
if (ret) {
pr_err("Unable to register hotplug slot - %d\n", ret);
goto error_register;
@ -765,11 +755,7 @@ static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
return 0;
error_register:
kfree(eeepc->hotplug_slot->info);
error_info:
kfree(eeepc->hotplug_slot);
eeepc->hotplug_slot = NULL;
error_slot:
eeepc->hotplug_slot.ops = NULL;
return ret;
}
@ -830,11 +816,8 @@ static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
eeepc->wlan_rfkill = NULL;
}
if (eeepc->hotplug_slot) {
pci_hp_deregister(eeepc->hotplug_slot);
kfree(eeepc->hotplug_slot->info);
kfree(eeepc->hotplug_slot);
}
if (eeepc->hotplug_slot.ops)
pci_hp_deregister(&eeepc->hotplug_slot);
if (eeepc->bluetooth_rfkill) {
rfkill_unregister(eeepc->bluetooth_rfkill);

2
drivers/scsi/aacraid/linit.c
View file

@ -2055,8 +2055,6 @@ static void aac_pci_resume(struct pci_dev *pdev)
struct scsi_device *sdev = NULL;
struct aac_dev *aac = (struct aac_dev *)shost_priv(shost);
pci_cleanup_aer_uncorrect_error_status(pdev);
if (aac_adapter_ioremap(aac, aac->base_size)) {
dev_err(&pdev->dev, "aacraid: ioremap failed\n");

1
drivers/scsi/be2iscsi/be_main.c
View file

@ -5529,7 +5529,6 @@ static pci_ers_result_t beiscsi_eeh_reset(struct pci_dev *pdev)
return PCI_ERS_RESULT_DISCONNECT;
}
pci_cleanup_aer_uncorrect_error_status(pdev);
return PCI_ERS_RESULT_RECOVERED;
}

2
drivers/scsi/bfa/bfad.c
View file

@ -1569,8 +1569,6 @@ bfad_pci_slot_reset(struct pci_dev *pdev)
if (pci_set_dma_mask(bfad->pcidev, DMA_BIT_MASK(32)) != 0)
goto out_disable_device;
pci_cleanup_aer_uncorrect_error_status(pdev);
if (restart_bfa(bfad) == -1)
goto out_disable_device;

1
drivers/scsi/csiostor/csio_init.c
View file

@ -1102,7 +1102,6 @@ csio_pci_slot_reset(struct pci_dev *pdev)
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
pci_cleanup_aer_uncorrect_error_status(pdev);
/* Bring HW s/m to ready state.
* but don't resume IOs.

8
drivers/scsi/lpfc/lpfc_init.c
View file

@ -11329,10 +11329,6 @@ lpfc_io_resume_s3(struct pci_dev *pdev)
/* Bring device online, it will be no-op for non-fatal error resume */
lpfc_online(phba);
/* Clean up Advanced Error Reporting (AER) if needed */
if (phba->hba_flag & HBA_AER_ENABLED)
pci_cleanup_aer_uncorrect_error_status(pdev);
}
/**
@ -12144,10 +12140,6 @@ lpfc_io_resume_s4(struct pci_dev *pdev)
/* Bring the device back online */
lpfc_online(phba);
}
/* Clean up Advanced Error Reporting (AER) if needed */
if (phba->hba_flag & HBA_AER_ENABLED)
pci_cleanup_aer_uncorrect_error_status(pdev);
}
/**

1
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View file

@ -10828,7 +10828,6 @@ scsih_pci_resume(struct pci_dev *pdev)
pr_info(MPT3SAS_FMT "PCI error: resume callback!!\n", ioc->name);
pci_cleanup_aer_uncorrect_error_status(pdev);
mpt3sas_base_start_watchdog(ioc);
scsi_unblock_requests(ioc->shost);
}

2
drivers/scsi/qla2xxx/qla_os.c
View file

@ -6839,8 +6839,6 @@ qla2xxx_pci_resume(struct pci_dev *pdev)
"The device failed to resume I/O from slot/link_reset.\n");
}
pci_cleanup_aer_uncorrect_error_status(pdev);
ha->flags.eeh_busy = 0;
}

1
drivers/scsi/qla4xxx/ql4_os.c
View file

@ -9824,7 +9824,6 @@ qla4xxx_pci_resume(struct pci_dev *pdev)
__func__);
}
pci_cleanup_aer_uncorrect_error_status(pdev);
clear_bit(AF_EEH_BUSY, &ha->flags);
}

8
include/acpi/acpi_bus.h
View file

@ -346,10 +346,16 @@ struct acpi_device_physical_node {
bool put_online:1;
};
struct acpi_device_properties {
const guid_t *guid;
const union acpi_object *properties;
struct list_head list;
};
/* ACPI Device Specific Data (_DSD) */
struct acpi_device_data {
const union acpi_object *pointer;
const union acpi_object *properties;
struct list_head properties;
const union acpi_object *of_compatible;
struct list_head subnodes;
};

9
include/linux/acpi.h
View file

@ -1074,6 +1074,15 @@ static inline int acpi_node_get_property_reference(
NR_FWNODE_REFERENCE_ARGS, args);
}
static inline bool acpi_dev_has_props(const struct acpi_device *adev)
{
return !list_empty(&adev->data.properties);
}
struct acpi_device_properties *
acpi_data_add_props(struct acpi_device_data *data, const guid_t *guid,
const union acpi_object *properties);
int acpi_node_prop_get(const struct fwnode_handle *fwnode, const char *propname,
void **valptr);
int acpi_dev_prop_read_single(struct acpi_device *adev,

1
include/linux/pci.h
View file

@ -403,6 +403,7 @@ struct pci_dev {
unsigned int has_secondary_link:1;
unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
unsigned int is_probed:1; /* Device probing in progress */
unsigned int link_active_reporting:1;/* Device capable of reporting link active */
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */

43
include/linux/pci_hotplug.h
View file

@ -16,8 +16,6 @@
/**
* struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
* @owner: The module owner of this structure
* @mod_name: The module name (KBUILD_MODNAME) of this structure
* @enable_slot: Called when the user wants to enable a specific pci slot
* @disable_slot: Called when the user wants to disable a specific pci slot
* @set_attention_status: Called to set the specific slot's attention LED to
@ -25,17 +23,9 @@
* @hardware_test: Called to run a specified hardware test on the specified
* slot.
* @get_power_status: Called to get the current power status of a slot.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
* @get_attention_status: Called to get the current attention status of a slot.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
* @get_latch_status: Called to get the current latch status of a slot.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
* @get_adapter_status: Called to get see if an adapter is present in the slot or not.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
* @reset_slot: Optional interface to allow override of a bus reset for the
* slot for cases where a secondary bus reset can result in spurious
* hotplug events or where a slot can be reset independent of the bus.
@ -46,8 +36,6 @@
* set an LED, enable / disable power, etc.)
*/
struct hotplug_slot_ops {
struct module *owner;
const char *mod_name;
int (*enable_slot) (struct hotplug_slot *slot);
int (*disable_slot) (struct hotplug_slot *slot);
int (*set_attention_status) (struct hotplug_slot *slot, u8 value);
@ -59,38 +47,20 @@ struct hotplug_slot_ops {
int (*reset_slot) (struct hotplug_slot *slot, int probe);
};
/**
* struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot
* @power_status: if power is enabled or not (1/0)
* @attention_status: if the attention light is enabled or not (1/0)
* @latch_status: if the latch (if any) is open or closed (1/0)
* @adapter_status: if there is a pci board present in the slot or not (1/0)
*
* Used to notify the hotplug pci core of the status of a specific slot.
*/
struct hotplug_slot_info {
u8 power_status;
u8 attention_status;
u8 latch_status;
u8 adapter_status;
};
/**
* struct hotplug_slot - used to register a physical slot with the hotplug pci core
* @ops: pointer to the &struct hotplug_slot_ops to be used for this slot
* @info: pointer to the &struct hotplug_slot_info for the initial values for
* this slot.
* @private: used by the hotplug pci controller driver to store whatever it
* needs.
* @owner: The module owner of this structure
* @mod_name: The module name (KBUILD_MODNAME) of this structure
*/
struct hotplug_slot {
struct hotplug_slot_ops *ops;
struct hotplug_slot_info *info;
void *private;
const struct hotplug_slot_ops *ops;
/* Variables below this are for use only by the hotplug pci core. */
struct list_head slot_list;
struct pci_slot *pci_slot;
struct module *owner;
const char *mod_name;
};
static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
@ -110,9 +80,6 @@ void pci_hp_del(struct hotplug_slot *slot);
void pci_hp_destroy(struct hotplug_slot *slot);
void pci_hp_deregister(struct hotplug_slot *slot);
int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
struct hotplug_slot_info *info);
/* use a define to avoid include chaining to get THIS_MODULE & friends */
#define pci_hp_register(slot, pbus, devnr, name) \
__pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME)