[PATCH] PCI: add PCI Express Port Bus Driver subsystem

From: Greg KH
Date: Mon Jan 17 2005 - 18:24:45 EST

ChangeSet 1.2329.2.1, 2005/01/14 15:56:18-08:00, tlnguyen@xxxxxxxxxxxxxxxxxxxxxxx

[PATCH] PCI: add PCI Express Port Bus Driver subsystem

Signed-off-by: T. Long Nguyen <tom.l.nguyen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <greg@xxxxxxxxx>


Documentation/PCIEBUS-HOWTO.txt | 217 ++++++++++++++++++
arch/i386/Kconfig | 2
drivers/Makefile | 1
drivers/pci/hotplug/Kconfig | 21 -
drivers/pci/hotplug/pciehp.h | 3
drivers/pci/hotplug/pciehp_core.c | 83 ++++--
drivers/pci/hotplug/pciehp_hpc.c | 21 -
drivers/pci/pcie/Kconfig | 38 +++
drivers/pci/pcie/Makefile | 7
drivers/pci/pcie/portdrv.h | 42 +++
drivers/pci/pcie/portdrv_bus.c | 88 +++++++
drivers/pci/pcie/portdrv_core.c | 453 ++++++++++++++++++++++++++++++++++++++
drivers/pci/pcie/portdrv_pci.c | 138 +++++++++++
include/linux/pcieport_if.h | 74 ++++++
14 files changed, 1123 insertions(+), 65 deletions(-)


diff -Nru a/Documentation/PCIEBUS-HOWTO.txt b/Documentation/PCIEBUS-HOWTO.txt
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/Documentation/PCIEBUS-HOWTO.txt 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,217 @@
+ The PCI Express Port Bus Driver Guide HOWTO
+ Tom L Nguyen tom.l.nguyen@xxxxxxxxx
+ 11/03/2004
+
+1. About this guide
+
+This guide describes the basics of the PCI Express Port Bus driver
+and provides information on how to enable the service drivers to
+register/unregister with the PCI Express Port Bus Driver.
+
+2. Copyright 2004 Intel Corporation
+
+3. What is the PCI Express Port Bus Driver
+
+A PCI Express Port is a logical PCI-PCI Bridge structure. There
+are two types of PCI Express Port: the Root Port and the Switch
+Port. The Root Port originates a PCI Express link from a PCI Express
+Root Complex and the Switch Port connects PCI Express links to
+internal logical PCI buses. The Switch Port, which has its secondary
+bus representing the switch's internal routing logic, is called the
+switch's Upstream Port. The switch's Downstream Port is bridging from
+switch's internal routing bus to a bus representing the downstream
+PCI Express link from the PCI Express Switch.
+
+A PCI Express Port can provide up to four distinct functions,
+referred to in this document as services, depending on its port type.
+PCI Express Port's services include native hotplug support (HP),
+power management event support (PME), advanced error reporting
+support (AER), and virtual channel support (VC). These services may
+be handled by a single complex driver or be individually distributed
+and handled by corresponding service drivers.
+
+4. Why use the PCI Express Port Bus Driver?
+
+In existing Linux kernels, the Linux Device Driver Model allows a
+physical device to be handled by only a single driver. The PCI
+Express Port is a PCI-PCI Bridge device with multiple distinct
+services. To maintain a clean and simple solution each service
+may have its own software service driver. In this case several
+service drivers will compete for a single PCI-PCI Bridge device.
+For example, if the PCI Express Root Port native hotplug service
+driver is loaded first, it claims a PCI-PCI Bridge Root Port. The
+kernel therefore does not load other service drivers for that Root
+Port. In other words, it is impossible to have multiple service
+drivers load and run on a PCI-PCI Bridge device simultaneously
+using the current driver model.
+
+To enable multiple service drivers running simultaneously requires
+having a PCI Express Port Bus driver, which manages all populated
+PCI Express Ports and distributes all provided service requests
+to the corresponding service drivers as required. Some key
+advantages of using the PCI Express Port Bus driver are listed below:
+
+ - Allow multiple service drivers to run simultaneously on
+ a PCI-PCI Bridge Port device.
+
+ - Allow service drivers implemented in an independent
+ staged approach.
+
+ - Allow one service driver to run on multiple PCI-PCI Bridge
+ Port devices.
+
+ - Manage and distribute resources of a PCI-PCI Bridge Port
+ device to requested service drivers.
+
+5. Configuring the PCI Express Port Bus Driver vs. Service Drivers
+
+5.1 Including the PCI Express Port Bus Driver Support into the Kernel
+
+Including the PCI Express Port Bus driver depends on whether the PCI
+Express support is included in the kernel config. The kernel will
+automatically include the PCI Express Port Bus driver as a kernel
+driver when the PCI Express support is enabled in the kernel.
+
+5.2 Enabling Service Driver Support
+
+PCI device drivers are implemented based on Linux Device Driver Model.
+All service drivers are PCI device drivers. As discussed above, it is
+impossible to load any service driver once the kernel has loaded the
+PCI Express Port Bus Driver. To meet the PCI Express Port Bus Driver
+Model requires some minimal changes on existing service drivers that
+imposes no impact on the functionality of existing service drivers.
+
+A service driver is required to use the two APIs shown below to
+register its service with the PCI Express Port Bus driver (see
+section 5.2.1 & 5.2.2). It is important that a service driver
+initializes the pcie_port_service_driver data structure, included in
+header file /include/linux/pcieport_if.h, before calling these APIs.
+Failure to do so will result an identity mismatch, which prevents
+the PCI Express Port Bus driver from loading a service driver.
+
+5.2.1 pcie_port_service_register
+
+int pcie_port_service_register(struct pcie_port_service_driver *new)
+
+This API replaces the Linux Driver Model's pci_module_init API. A
+service driver should always calls pcie_port_service_register at
+module init. Note that after service driver being loaded, calls
+such as pci_enable_device(dev) and pci_set_master(dev) are no longer
+necessary since these calls are executed by the PCI Port Bus driver.
+
+5.2.2 pcie_port_service_unregister
+
+void pcie_port_service_unregister(struct pcie_port_service_driver *new)
+
+pcie_port_service_unregister replaces the Linux Driver Model's
+pci_unregister_driver. It's always called by service driver when a
+module exits.
+
+5.2.3 Sample Code
+
+Below is sample service driver code to initialize the port service
+driver data structure.
+
+static struct pcie_port_service_id service_id[] = { {
+ .vendor = PCI_ANY_ID,
+ .device = PCI_ANY_ID,
+ .port_type = PCIE_RC_PORT,
+ .service_type = PCIE_PORT_SERVICE_AER,
+ }, { /* end: all zeroes */ }
+};
+
+static struct pcie_port_service_driver root_aerdrv = {
+ .name = (char *)device_name,
+ .id_table = &service_id[0],
+
+ .probe = aerdrv_load,
+ .remove = aerdrv_unload,
+
+ .suspend = aerdrv_suspend,
+ .resume = aerdrv_resume,
+};
+
+Below is a sample code for registering/unregistering a service
+driver.
+
+static int __init aerdrv_service_init(void)
+{
+ int retval = 0;
+
+ retval = pcie_port_service_register(&root_aerdrv);
+ if (!retval) {
+ /*
+ * FIX ME
+ */
+ }
+ return retval;
+}
+
+static void __exit aerdrv_service_exit(void)
+{
+ pcie_port_service_unregister(&root_aerdrv);
+}
+
+module_init(aerdrv_service_init);
+module_exit(aerdrv_service_exit);
+
+6. Possible Resource Conflicts
+
+Since all service drivers of a PCI-PCI Bridge Port device are
+allowed to run simultaneously, below lists a few of possible resource
+conflicts with proposed solutions.
+
+6.1 MSI Vector Resource
+
+The MSI capability structure enables a device software driver to call
+pci_enable_msi to request MSI based interrupts. Once MSI interrupts
+are enabled on a device, it stays in this mode until a device driver
+calls pci_disable_msi to disable MSI interrupts and revert back to
+INTx emulation mode. Since service drivers of the same PCI-PCI Bridge
+port share the same physical device, if an individual service driver
+calls pci_enable_msi/pci_disable_msi it may result unpredictable
+behavior. For example, two service drivers run simultaneously on the
+same physical Root Port. Both service drivers call pci_enable_msi to
+request MSI based interrupts. A service driver may not know whether
+any other service drivers have run on this Root Port. If either one
+of them calls pci_disable_msi, it puts the other service driver
+in a wrong interrupt mode.
+
+To avoid this situation all service drivers are not permitted to
+switch interrupt mode on its device. The PCI Express Port Bus driver
+is responsible for determining the interrupt mode and this should be
+transparent to service drivers. Service drivers need to know only
+the vector IRQ assigned to the field irq of struct pcie_device, which
+is passed in when the PCI Express Port Bus driver probes each service
+driver. Service drivers should use (struct pcie_device*)dev->irq to
+call request_irq/free_irq. In addition, the interrupt mode is stored
+in the field interrupt_mode of struct pcie_device.
+
+6.2 MSI-X Vector Resources
+
+Similar to the MSI a device driver for an MSI-X capable device can
+call pci_enable_msix to request MSI-X interrupts. All service drivers
+are not permitted to switch interrupt mode on its device. The PCI
+Express Port Bus driver is responsible for determining the interrupt
+mode and this should be transparent to service drivers. Any attempt
+by service driver to call pci_enable_msix/pci_disable_msix may
+result unpredictable behavior. Service drivers should use
+(struct pcie_device*)dev->irq and call request_irq/free_irq.
+
+6.3 PCI Memory/IO Mapped Regions
+
+Service drivers for PCI Express Power Management (PME), Advanced
+Error Reporting (AER), Hot-Plug (HP) and Virtual Channel (VC) access
+PCI configuration space on the PCI Express port. In all cases the
+registers accessed are independent of each other. This patch assumes
+that all service drivers will be well behaved and not overwrite
+other service driver's configuration settings.
+
+6.4 PCI Config Registers
+
+Each service driver runs its PCI config operations on its own
+capability structure except the PCI Express capability structure, in
+which Root Control register and Device Control register are shared
+between PME and AER. This patch assumes that all service drivers
+will be well behaved and not overwrite other service driver's
+configuration settings.
diff -Nru a/arch/i386/Kconfig b/arch/i386/Kconfig
--- a/arch/i386/Kconfig 2005-01-17 13:56:37 -08:00
+++ b/arch/i386/Kconfig 2005-01-17 13:56:37 -08:00
@@ -1132,6 +1132,8 @@
select ACPI_BOOT
default y

+source "drivers/pci/pcie/Kconfig"
+
source "drivers/pci/Kconfig"

config ISA
diff -Nru a/drivers/Makefile b/drivers/Makefile
--- a/drivers/Makefile 2005-01-17 13:56:37 -08:00
+++ b/drivers/Makefile 2005-01-17 13:56:37 -08:00
@@ -55,6 +55,7 @@
obj-$(CONFIG_PHONE) += telephony/
obj-$(CONFIG_MD) += md/
obj-$(CONFIG_BT) += bluetooth/
+obj-$(CONFIG_PCIEPORTBUS) += pci/pcie/
obj-$(CONFIG_ISDN) += isdn/
obj-$(CONFIG_MCA) += mca/
obj-$(CONFIG_EISA) += eisa/
diff -Nru a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
--- a/drivers/pci/hotplug/Kconfig 2005-01-17 13:56:37 -08:00
+++ b/drivers/pci/hotplug/Kconfig 2005-01-17 13:56:37 -08:00
@@ -134,27 +134,6 @@

When in doubt, say N.

-config HOTPLUG_PCI_PCIE
- tristate "PCI Express Hotplug driver"
- depends on HOTPLUG_PCI
- help
- Say Y here if you have a motherboard that supports PCI Express Native
- Hotplug
-
- To compile this driver as a module, choose M here: the
- module will be called pciehp.
-
- When in doubt, say N.
-
-config HOTPLUG_PCI_PCIE_POLL_EVENT_MODE
- bool "Use polling mechanism for hot-plug events (for testing purpose)"
- depends on HOTPLUG_PCI_PCIE
- help
- Say Y here if you want to use the polling mechanism for hot-plug
- events for early platform testing.
-
- When in doubt, say N.
-
config HOTPLUG_PCI_SHPC
tristate "SHPC PCI Hotplug driver"
depends on HOTPLUG_PCI
diff -Nru a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
--- a/drivers/pci/hotplug/pciehp.h 2005-01-17 13:56:37 -08:00
+++ b/drivers/pci/hotplug/pciehp.h 2005-01-17 13:56:37 -08:00
@@ -34,6 +34,7 @@
#include <linux/delay.h>
#include <asm/semaphore.h>
#include <asm/io.h>
+#include <linux/pcieport_if.h>
#include "pci_hotplug.h"

#define MY_NAME "pciehp"
@@ -311,7 +312,7 @@

typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);

-int pcie_init(struct controller *ctrl, struct pci_dev *pdev,
+int pcie_init(struct controller *ctrl, struct pcie_device *dev,
php_intr_callback_t attention_button_callback,
php_intr_callback_t switch_change_callback,
php_intr_callback_t presence_change_callback,
diff -Nru a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
--- a/drivers/pci/hotplug/pciehp_core.c 2005-01-17 13:56:37 -08:00
+++ b/drivers/pci/hotplug/pciehp_core.c 2005-01-17 13:56:37 -08:00
@@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include "pciehp.h"
#include "pciehprm.h"
+#include <linux/interrupt.h>

/* Global variables */
int pciehp_debug;
@@ -346,7 +347,7 @@
return 0;
}

-static int pcie_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_id *id)
{
int rc;
struct controller *ctrl;
@@ -354,7 +355,9 @@
int first_device_num = 0 ; /* first PCI device number supported by this PCIE */
int num_ctlr_slots; /* number of slots supported by this HPC */
u8 value;
-
+ struct pci_dev *pdev;
+
+ dbg("%s: Called by hp_drv\n", __FUNCTION__);
ctrl = kmalloc(sizeof(*ctrl), GFP_KERNEL);
if (!ctrl) {
err("%s : out of memory\n", __FUNCTION__);
@@ -363,8 +366,10 @@
memset(ctrl, 0, sizeof(struct controller));

dbg("%s: DRV_thread pid = %d\n", __FUNCTION__, current->pid);
+
+ pdev = dev->port;

- rc = pcie_init(ctrl, pdev,
+ rc = pcie_init(ctrl, dev,
(php_intr_callback_t) pciehp_handle_attention_button,
(php_intr_callback_t) pciehp_handle_switch_change,
(php_intr_callback_t) pciehp_handle_presence_change,
@@ -562,32 +567,52 @@

}

+int hpdriver_context = 0;

-static struct pci_device_id pcied_pci_tbl[] = {
- {
- .class = ((PCI_CLASS_BRIDGE_PCI << 8) | 0x00),
- .class_mask = ~0,
- .vendor = PCI_ANY_ID,
- .device = PCI_ANY_ID,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- },
-
- { /* end: all zeroes */ }
-};
-
-MODULE_DEVICE_TABLE(pci, pcied_pci_tbl);
+static void pciehp_remove (struct pcie_device *device)
+{
+ printk("%s ENTRY\n", __FUNCTION__);
+ printk("%s -> Call free_irq for irq = %d\n",
+ __FUNCTION__, device->irq);
+ free_irq(device->irq, &hpdriver_context);
+}

+#ifdef CONFIG_PM
+static int pciehp_suspend (struct pcie_device *dev, u32 state)
+{
+ printk("%s ENTRY\n", __FUNCTION__);
+ return 0;
+}

+static int pciehp_resume (struct pcie_device *dev)
+{
+ printk("%s ENTRY\n", __FUNCTION__);
+ return 0;
+}
+#endif

-static struct pci_driver pcie_driver = {
- .name = PCIE_MODULE_NAME,
- .id_table = pcied_pci_tbl,
- .probe = pcie_probe,
- /* remove: pcie_remove_one, */
+static struct pcie_port_service_id port_pci_ids[] = { {
+ .vendor = PCI_ANY_ID,
+ .device = PCI_ANY_ID,
+ .port_type = PCIE_RC_PORT,
+ .service_type = PCIE_PORT_SERVICE_HP,
+ .driver_data = 0,
+ }, { /* end: all zeroes */ }
};
+static const char device_name[] = "hpdriver";

-
+static struct pcie_port_service_driver hpdriver_portdrv = {
+ .name = (char *)device_name,
+ .id_table = &port_pci_ids[0],
+
+ .probe = pciehp_probe,
+ .remove = pciehp_remove,
+
+#ifdef CONFIG_PM
+ .suspend = pciehp_suspend,
+ .resume = pciehp_resume,
+#endif /* PM */
+};

static int __init pcied_init(void)
{
@@ -603,9 +628,11 @@

retval = pciehprm_init(PCI);
if (!retval) {
- retval = pci_register_driver(&pcie_driver);
- dbg("pci_register_driver = %d\n", retval);
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ retval = pcie_port_service_register(&hpdriver_portdrv);
+ dbg("pcie_port_service_register = %d\n", retval);
+ info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ if (retval)
+ dbg("%s: Failure to register service\n", __FUNCTION__);
}

error_hpc_init:
@@ -625,8 +652,8 @@

pciehprm_cleanup();

- dbg("pci_unregister_driver\n");
- pci_unregister_driver(&pcie_driver);
+ dbg("pcie_port_service_unregister\n");
+ pcie_port_service_unregister(&hpdriver_portdrv);

info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}
diff -Nru a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
--- a/drivers/pci/hotplug/pciehp_hpc.c 2005-01-17 13:56:37 -08:00
+++ b/drivers/pci/hotplug/pciehp_hpc.c 2005-01-17 13:56:37 -08:00
@@ -1249,7 +1249,7 @@
};

int pcie_init(struct controller * ctrl,
- struct pci_dev *pdev,
+ struct pcie_device *dev,
php_intr_callback_t attention_button_callback,
php_intr_callback_t switch_change_callback,
php_intr_callback_t presence_change_callback,
@@ -1265,6 +1265,7 @@
u32 slot_cap;
int cap_base, saved_cap_base;
u16 slot_status, slot_ctrl;
+ struct pci_dev *pdev;

DBG_ENTER_ROUTINE

@@ -1277,7 +1278,8 @@
}

memset(php_ctlr, 0, sizeof(struct php_ctlr_state_s));
-
+
+ pdev = dev->port;
php_ctlr->pci_dev = pdev; /* save pci_dev in context */

dbg("%s: pdev->vendor %x pdev->device %x\n", __FUNCTION__,
@@ -1338,7 +1340,7 @@
}

dbg("pdev = %p: b:d:f:irq=0x%x:%x:%x:%x\n", pdev, pdev->bus->number,
- PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), pdev->irq);
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
if (pci_resource_len(pdev, rc) > 0)
dbg("pci resource[%d] start=0x%lx(len=0x%lx)\n", rc,
@@ -1355,7 +1357,7 @@
init_waitqueue_head(&ctrl->queue);

/* find the IRQ */
- php_ctlr->irq = pdev->irq;
+ php_ctlr->irq = dev->irq;
dbg("HPC interrupt = %d\n", php_ctlr->irq);

/* Save interrupt callback info */
@@ -1407,17 +1409,6 @@
start_int_poll_timer( php_ctlr, 10 ); /* start with 10 second delay */
} else {
/* Installs the interrupt handler */
- dbg("%s: pcie_mch_quirk = %x\n", __FUNCTION__, pcie_mch_quirk);
- if (!pcie_mch_quirk) {
- rc = pci_enable_msi(pdev);
- if (rc) {
- info("Can't get msi for the hotplug controller\n");
- info("Use INTx for the hotplug controller\n");
- dbg("%s: rc = %x\n", __FUNCTION__, rc);
- } else
- php_ctlr->irq = pdev->irq;
- }
-
rc = request_irq(php_ctlr->irq, pcie_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
if (rc) {
diff -Nru a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/Kconfig 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,38 @@
+#
+# PCI Express Port Bus Configuration
+#
+config PCIEPORTBUS
+ bool "PCI Express support"
+ depends on PCI_GOMMCONFIG || PCI_GOANY
+ default n
+
+ ---help---
+ This automatically enables PCI Express Port Bus support. Users can
+ choose Native Hot-Plug support, Advanced Error Reporting support,
+ Power Management Event support and Virtual Channel support to run
+ on PCI Express Ports (Root or Switch).
+
+#
+# Include service Kconfig here
+#
+config HOTPLUG_PCI_PCIE
+ tristate "PCI Express Hotplug driver"
+ depends on HOTPLUG_PCI && PCIEPORTBUS
+ help
+ Say Y here if you have a motherboard that supports PCI Express Native
+ Hotplug
+
+ To compile this driver as a module, choose M here: the
+ module will be called pciehp.
+
+ When in doubt, say N.
+
+config HOTPLUG_PCI_PCIE_POLL_EVENT_MODE
+ bool "Use polling mechanism for hot-plug events (for testing purpose)"
+ depends on HOTPLUG_PCI_PCIE
+ help
+ Say Y here if you want to use the polling mechanism for hot-plug
+ events for early platform testing.
+
+ When in doubt, say N.
+
diff -Nru a/drivers/pci/pcie/Makefile b/drivers/pci/pcie/Makefile
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/Makefile 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,7 @@
+#
+# Makefile for PCI-Express PORT Driver
+#
+
+pcieportdrv-y := portdrv_core.o portdrv_pci.o portdrv_bus.o
+
+obj-$(CONFIG_PCIEPORTBUS) += pcieportdrv.o
diff -Nru a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/portdrv.h 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,42 @@
+/*
+ * File: portdrv.h
+ * Purpose: PCI Express Port Bus Driver's Internal Data Structures
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ */
+
+#ifndef _PORTDRV_H_
+#define _PORTDRV_H_
+
+#if !defined(PCI_CAP_ID_PME)
+#define PCI_CAP_ID_PME 1
+#endif
+
+#if !defined(PCI_CAP_ID_EXP)
+#define PCI_CAP_ID_EXP 0x10
+#endif
+
+#define PORT_TYPE_MASK 0xf
+#define PORT_TO_SLOT_MASK 0x100
+#define SLOT_HP_CAPABLE_MASK 0x40
+#define PCIE_CAPABILITIES_REG 0x2
+#define PCIE_SLOT_CAPABILITIES_REG 0x14
+#define PCIE_PORT_DEVICE_MAXSERVICES 4
+#define PCI_CFG_SPACE_SIZE 256
+
+#define get_descriptor_id(type, service) (((type - 4) << 4) | service)
+
+extern struct bus_type pcie_port_bus_type;
+extern struct device_driver pcieport_generic_driver;
+extern int pcie_port_device_probe(struct pci_dev *dev);
+extern int pcie_port_device_register(struct pci_dev *dev);
+#ifdef CONFIG_PM
+extern int pcie_port_device_suspend(struct pcie_device *dev, u32 state);
+extern int pcie_port_device_resume(struct pcie_device *dev);
+#endif
+extern void pcie_port_device_remove(struct pcie_device *dev);
+extern void pcie_port_bus_register(void);
+extern void pcie_port_bus_unregister(void);
+
+#endif /* _PORTDRV_H_ */
diff -Nru a/drivers/pci/pcie/portdrv_bus.c b/drivers/pci/pcie/portdrv_bus.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/portdrv_bus.c 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,88 @@
+/*
+ * File: portdrv_bus.c
+ * Purpose: PCI Express Port Bus Driver's Bus Overloading Functions
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+
+#include <linux/pcieport_if.h>
+
+static int generic_probe (struct device *dev) { return 0;}
+static int generic_remove (struct device *dev) { return 0;}
+static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
+static int pcie_port_bus_suspend(struct device *dev, u32 state);
+static int pcie_port_bus_resume(struct device *dev);
+
+struct bus_type pcie_port_bus_type = {
+ .name = "pci_express",
+ .match = pcie_port_bus_match,
+ .suspend = pcie_port_bus_suspend,
+ .resume = pcie_port_bus_resume,
+};
+
+struct device_driver pcieport_generic_driver = {
+ .name = "pcieport",
+ .bus = &pcie_port_bus_type,
+ .probe = generic_probe,
+ .remove = generic_remove,
+};
+
+static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if ( drv->bus != &pcie_port_bus_type ||
+ dev->bus != &pcie_port_bus_type ||
+ drv == &pcieport_generic_driver) {
+ return 0;
+ }
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(drv);
+ if ( (driver->id_table->vendor != PCI_ANY_ID &&
+ driver->id_table->vendor != pciedev->id.vendor) ||
+ (driver->id_table->device != PCI_ANY_ID &&
+ driver->id_table->device != pciedev->id.device) ||
+ driver->id_table->port_type != pciedev->id.port_type ||
+ driver->id_table->service_type != pciedev->id.service_type )
+ return 0;
+
+ return 1;
+}
+
+static int pcie_port_bus_suspend(struct device *dev, u32 state)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if (!dev || !dev->driver)
+ return 0;
+
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(dev->driver);
+ if (driver && driver->suspend)
+ driver->suspend(pciedev, state);
+ return 0;
+}
+
+static int pcie_port_bus_resume(struct device *dev)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if (!dev || !dev->driver)
+ return 0;
+
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(dev->driver);
+ if (driver && driver->resume)
+ driver->resume(pciedev);
+ return 0;
+}
diff -Nru a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/portdrv_core.c 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,453 @@
+/*
+ * File: portdrv_core.c
+ * Purpose: PCI Express Port Bus Driver's Core Functions
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/pcieport_if.h>
+
+#include "portdrv.h"
+
+extern int pcie_mch_quirk; /* MSI-quirk Indicator */
+
+extern struct device_driver pcieport_generic_driver;
+
+static int pcie_port_probe_service(struct device *dev)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+ int status = -ENODEV;
+
+ if (!dev || !dev->driver)
+ return status;
+
+ driver = to_service_driver(dev->driver);
+ if (!driver || !driver->probe)
+ return status;
+
+ pciedev = to_pcie_device(dev);
+ status = driver->probe(pciedev, driver->id_table);
+ if (!status) {
+ printk(KERN_DEBUG "Load service driver %s on pcie device %s\n",
+ driver->name, dev->bus_id);
+ get_device(dev);
+ }
+ return status;
+}
+
+static int pcie_port_remove_service(struct device *dev)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if (!dev || !dev->driver)
+ return 0;
+
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(dev->driver);
+ if (driver && driver->remove) {
+ printk(KERN_DEBUG "Unload service driver %s on pcie device %s\n",
+ driver->name, dev->bus_id);
+ driver->remove(pciedev);
+ put_device(dev);
+ }
+ return 0;
+}
+
+static void pcie_port_shutdown_service(struct device *dev) {}
+
+static int pcie_port_suspend_service(struct device *dev, u32 state, u32 level)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if (!dev || !dev->driver)
+ return 0;
+
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(dev->driver);
+ if (driver && driver->suspend)
+ driver->suspend(pciedev, state);
+ return 0;
+}
+
+static int pcie_port_resume_service(struct device *dev, u32 state)
+{
+ struct pcie_device *pciedev;
+ struct pcie_port_service_driver *driver;
+
+ if (!dev || !dev->driver)
+ return 0;
+
+ pciedev = to_pcie_device(dev);
+ driver = to_service_driver(dev->driver);
+
+ if (driver && driver->resume)
+ driver->resume(pciedev);
+ return 0;
+}
+
+/*
+ * release_pcie_device
+ *
+ * Being invoked automatically when device is being removed
+ * in response to device_unregister(dev) call.
+ * Release all resources being claimed.
+ */
+static void release_pcie_device(struct device *dev)
+{
+ kfree(to_pcie_device(dev));
+}
+
+static int is_msi_quirked(struct pci_dev *dev)
+{
+ int port_type, quirk = 0;
+ u16 reg16;
+
+ pci_read_config_word(dev,
+ pci_find_capability(dev, PCI_CAP_ID_EXP) +
+ PCIE_CAPABILITIES_REG, &reg16);
+ port_type = (reg16 >> 4) & PORT_TYPE_MASK;
+ switch(port_type) {
+ case PCIE_RC_PORT:
+ if (pcie_mch_quirk == 1)
+ quirk = 1;
+ break;
+ case PCIE_SW_UPSTREAM_PORT:
+ case PCIE_SW_DOWNSTREAM_PORT:
+ default:
+ break;
+ }
+ return quirk;
+}
+
+static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
+{
+ int i, pos, nvec, status = -EINVAL;
+ int interrupt_mode = PCIE_PORT_INTx_MODE;
+
+ /* Set INTx as default */
+ for (i = 0, nvec = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
+ if (mask & (1 << i))
+ nvec++;
+ vectors[i] = dev->irq;
+ }
+
+ /* Check MSI quirk */
+ if (is_msi_quirked(dev))
+ return interrupt_mode;
+
+ /* Select MSI-X over MSI if supported */
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+ if (pos) {
+ struct msix_entry msix_entries[PCIE_PORT_DEVICE_MAXSERVICES] =
+ {{0, 0}, {0, 1}, {0, 2}, {0, 3}};
+ printk("%s Found MSIX capability\n", __FUNCTION__);
+ status = pci_enable_msix(dev, msix_entries, nvec);
+ if (!status) {
+ int j = 0;
+
+ interrupt_mode = PCIE_PORT_MSIX_MODE;
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
+ if (mask & (1 << i))
+ vectors[i] = msix_entries[j++].vector;
+ }
+ }
+ }
+ if (status) {
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ if (pos) {
+ printk("%s Found MSI capability\n", __FUNCTION__);
+ status = pci_enable_msi(dev);
+ if (!status) {
+ interrupt_mode = PCIE_PORT_MSI_MODE;
+ for (i = 0;i < PCIE_PORT_DEVICE_MAXSERVICES;i++)
+ vectors[i] = dev->irq;
+ }
+ }
+ }
+ return interrupt_mode;
+}
+
+static int get_port_device_capability(struct pci_dev *dev)
+{
+ int services = 0, pos;
+ u16 reg16;
+ u32 reg32;
+
+ pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+ pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg16);
+ /* Hot-Plug Capable */
+ if (reg16 & PORT_TO_SLOT_MASK) {
+ pci_read_config_dword(dev,
+ pos + PCIE_SLOT_CAPABILITIES_REG, &reg32);
+ if (reg32 & SLOT_HP_CAPABLE_MASK)
+ services |= PCIE_PORT_SERVICE_HP;
+ }
+ /* PME Capable */
+ pos = pci_find_capability(dev, PCI_CAP_ID_PME);
+ if (pos)
+ services |= PCIE_PORT_SERVICE_PME;
+
+ pos = PCI_CFG_SPACE_SIZE;
+ while (pos) {
+ pci_read_config_dword(dev, pos, &reg32);
+ switch (reg32 & 0xffff) {
+ case PCI_EXT_CAP_ID_ERR:
+ services |= PCIE_PORT_SERVICE_AER;
+ pos = reg32 >> 20;
+ break;
+ case PCI_EXT_CAP_ID_VC:
+ services |= PCIE_PORT_SERVICE_VC;
+ pos = reg32 >> 20;
+ break;
+ default:
+ pos = 0;
+ break;
+ }
+ }
+
+ return services;
+}
+
+static void pcie_device_init(struct pcie_device *parent,
+ struct pcie_device *dev,
+ int port_type, int service_type)
+{
+ struct device *device;
+
+ if (parent) {
+ dev->id.vendor = parent->port->vendor;
+ dev->id.device = parent->port->device;
+ dev->id.port_type = port_type;
+ dev->id.service_type = (1 << service_type);
+ }
+
+ /* Initialize generic device interface */
+ device = &dev->device;
+ memset(device, 0, sizeof(struct device));
+ INIT_LIST_HEAD(&device->node);
+ INIT_LIST_HEAD(&device->children);
+ INIT_LIST_HEAD(&device->bus_list);
+ device->bus = &pcie_port_bus_type;
+ device->driver = NULL;
+ device->driver_data = NULL;
+ device->release = release_pcie_device; /* callback to free pcie dev */
+ sprintf(&device->bus_id[0], "%s.%02x", parent->device.bus_id,
+ get_descriptor_id(port_type, service_type));
+ device->parent = ((parent == NULL) ? NULL : &parent->device);
+}
+
+static struct pcie_device* alloc_pcie_device(
+ struct pcie_device *parent, struct pci_dev *bridge,
+ int port_type, int service_type, int irq, int irq_mode)
+{
+ struct pcie_device *device;
+ static int NR_PORTS = 0;
+
+ device = kmalloc(sizeof(struct pcie_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ memset(device, 0, sizeof(struct pcie_device));
+ device->port = bridge;
+ device->interrupt_mode = irq_mode;
+ device->irq = irq;
+ if (!parent) {
+ pcie_device_init(NULL, device, port_type, service_type);
+ NR_PORTS++;
+ device->device.driver = &pcieport_generic_driver;
+ sprintf(&device->device.bus_id[0], "port%d", NR_PORTS);
+ } else {
+ pcie_device_init(parent, device, port_type, service_type);
+ }
+ printk(KERN_DEBUG "Allocate Port Device[%s]\n", device->device.bus_id);
+ return device;
+}
+
+int pcie_port_device_probe(struct pci_dev *dev)
+{
+ int pos, type;
+ u16 reg;
+
+ if (!(pos = pci_find_capability(dev, PCI_CAP_ID_EXP)))
+ return -ENODEV;
+
+ pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg);
+ type = (reg >> 4) & PORT_TYPE_MASK;
+ if ( type == PCIE_RC_PORT || type == PCIE_SW_UPSTREAM_PORT ||
+ type == PCIE_SW_DOWNSTREAM_PORT )
+ return 0;
+
+ return -ENODEV;
+}
+
+int pcie_port_device_register(struct pci_dev *dev)
+{
+ struct pcie_device *parent;
+ int status, type, capabilities, irq_mode, i;
+ int vectors[PCIE_PORT_DEVICE_MAXSERVICES];
+ u16 reg16;
+
+ /* Get port type */
+ pci_read_config_word(dev,
+ pci_find_capability(dev, PCI_CAP_ID_EXP) +
+ PCIE_CAPABILITIES_REG, &reg16);
+ type = (reg16 >> 4) & PORT_TYPE_MASK;
+
+ /* Now get port services */
+ capabilities = get_port_device_capability(dev);
+ irq_mode = assign_interrupt_mode(dev, vectors, capabilities);
+
+ /* Allocate parent */
+ parent = alloc_pcie_device(NULL, dev, type, 0, dev->irq, irq_mode);
+ if (!parent)
+ return -ENOMEM;
+
+ status = device_register(&parent->device);
+ if (status) {
+ kfree(parent);
+ return status;
+ }
+ get_device(&parent->device);
+ pci_set_drvdata(dev, parent);
+
+ /* Allocate child services if any */
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
+ struct pcie_device *child;
+
+ if (capabilities & (1 << i)) {
+ child = alloc_pcie_device(
+ parent, /* parent */
+ dev, /* Root/Upstream/Downstream */
+ type, /* port type */
+ i, /* service type */
+ vectors[i], /* irq */
+ irq_mode /* interrupt mode */);
+ if (child) {
+ status = device_register(&child->device);
+ if (status) {
+ kfree(child);
+ continue;
+ }
+ get_device(&child->device);
+ }
+ }
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PM
+int pcie_port_device_suspend(struct pcie_device *dev, u32 state)
+{
+ struct list_head *head;
+ struct device *parent, *child;
+ struct device_driver *driver;
+ struct pcie_port_service_driver *service_driver;
+
+ parent = &dev->device;
+ head = &parent->children;
+ while (!list_empty(head)) {
+ child = container_of(head->next, struct device, node);
+ driver = child->driver;
+ if (!driver)
+ continue;
+ service_driver = to_service_driver(driver);
+ if (service_driver->suspend)
+ service_driver->suspend(to_pcie_device(child), state);
+ }
+ return 0;
+}
+
+int pcie_port_device_resume(struct pcie_device *dev)
+{
+ struct list_head *head;
+ struct device *parent, *child;
+ struct device_driver *driver;
+ struct pcie_port_service_driver *service_driver;
+
+ parent = &dev->device;
+ head = &parent->children;
+ while (!list_empty(head)) {
+ child = container_of(head->next, struct device, node);
+ driver = child->driver;
+ if (!driver)
+ continue;
+ service_driver = to_service_driver(driver);
+ if (service_driver->resume)
+ service_driver->resume(to_pcie_device(child));
+ }
+ return 0;
+
+}
+#endif
+
+void pcie_port_device_remove(struct pcie_device *dev)
+{
+ struct list_head *head;
+ struct device *parent, *child;
+ struct device_driver *driver;
+ struct pcie_port_service_driver *service_driver;
+
+ parent = &dev->device;
+ head = &parent->children;
+ while (!list_empty(head)) {
+ child = container_of(head->next, struct device, node);
+ driver = child->driver;
+ if (driver) {
+ service_driver = to_service_driver(driver);
+ if (service_driver->remove)
+ service_driver->remove(to_pcie_device(child));
+ }
+ put_device(child);
+ device_unregister(child);
+ }
+
+ /* Switch to INTx by default if MSI enabled */
+ if (dev->interrupt_mode == PCIE_PORT_MSIX_MODE)
+ pci_disable_msix(dev->port);
+ else if (dev->interrupt_mode == PCIE_PORT_MSI_MODE)
+ pci_disable_msi(dev->port);
+ put_device(parent);
+ device_unregister(parent);
+}
+
+void pcie_port_bus_register(void)
+{
+ bus_register(&pcie_port_bus_type);
+ driver_register(&pcieport_generic_driver);
+}
+
+void pcie_port_bus_unregister(void)
+{
+ driver_unregister(&pcieport_generic_driver);
+ bus_unregister(&pcie_port_bus_type);
+}
+
+int pcie_port_service_register(struct pcie_port_service_driver *new)
+{
+ new->driver.name = (char *)new->name;
+ new->driver.bus = &pcie_port_bus_type;
+ new->driver.probe = pcie_port_probe_service;
+ new->driver.remove = pcie_port_remove_service;
+ new->driver.shutdown = pcie_port_shutdown_service;
+ new->driver.suspend = pcie_port_suspend_service;
+ new->driver.resume = pcie_port_resume_service;
+
+ return driver_register(&new->driver);
+}
+
+void pcie_port_service_unregister(struct pcie_port_service_driver *new)
+{
+ driver_unregister(&new->driver);
+}
+
+EXPORT_SYMBOL(pcie_port_service_register);
+EXPORT_SYMBOL(pcie_port_service_unregister);
diff -Nru a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/pci/pcie/portdrv_pci.c 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,138 @@
+/*
+ * File: portdrv_pci.c
+ * Purpose: PCI Express Port Bus Driver
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/init.h>
+#include <linux/pcieport_if.h>
+
+#include "portdrv.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.0"
+#define DRIVER_AUTHOR "tom.l.nguyen@xxxxxxxxx"
+#define DRIVER_DESC "PCIE Port Bus Driver"
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+/* global data */
+static const char device_name[] = "pcieport-driver";
+
+/*
+ * pcie_portdrv_probe - Probe PCI-Express port devices
+ * @dev: PCI-Express port device being probed
+ *
+ * If detected invokes the pcie_port_device_register() method for
+ * this port device.
+ *
+ */
+static int __devinit pcie_portdrv_probe (struct pci_dev *dev,
+ const struct pci_device_id *id )
+{
+ int status;
+
+ status = pcie_port_device_probe(dev);
+ if (status)
+ return status;
+
+ if (pci_enable_device(dev) < 0)
+ return -ENODEV;
+
+ pci_set_master(dev);
+ if (!dev->irq) {
+ printk(KERN_WARNING
+ "%s->Dev[%04x:%04x] has invalid IRQ. Check vendor BIOS\n",
+ __FUNCTION__, dev->device, dev->vendor);
+ }
+ if (pcie_port_device_register(dev))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void pcie_portdrv_remove (struct pci_dev *dev)
+{
+ struct pcie_device *pciedev;
+
+ pciedev = (struct pcie_device *)pci_get_drvdata(dev);
+ if (pciedev) {
+ pcie_port_device_remove(pciedev);
+ pci_set_drvdata(dev, NULL);
+ }
+}
+
+#ifdef CONFIG_PM
+static int pcie_portdrv_suspend (struct pci_dev *dev, u32 state)
+{
+ struct pcie_device *pciedev;
+
+ pciedev = (struct pcie_device *)pci_get_drvdata(dev);
+ if (pciedev)
+ pcie_port_device_suspend(pciedev, state);
+ return 0;
+}
+
+static int pcie_portdrv_resume (struct pci_dev *dev)
+{
+ struct pcie_device *pciedev;
+
+ pciedev = (struct pcie_device *)pci_get_drvdata(dev);
+ if (pciedev)
+ pcie_port_device_resume(pciedev);
+ return 0;
+}
+#endif
+
+/*
+ * LINUX Device Driver Model
+ */
+static const struct pci_device_id port_pci_ids[] = { {
+ /* handle any PCI-Express port */
+ PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0),
+ }, { /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, port_pci_ids);
+
+static struct pci_driver pcie_portdrv = {
+ .name = (char *)device_name,
+ .id_table = &port_pci_ids[0],
+
+ .probe = pcie_portdrv_probe,
+ .remove = pcie_portdrv_remove,
+
+#ifdef CONFIG_PM
+ .suspend = pcie_portdrv_suspend,
+ .resume = pcie_portdrv_resume,
+#endif /* PM */
+};
+
+static int __init pcie_portdrv_init(void)
+{
+ int retval = 0;
+
+ pcie_port_bus_register();
+ retval = pci_module_init(&pcie_portdrv);
+ if (retval)
+ pcie_port_bus_unregister();
+ return retval;
+}
+
+static void __exit pcie_portdrv_exit(void)
+{
+ pci_unregister_driver(&pcie_portdrv);
+ pcie_port_bus_unregister();
+}
+
+module_init(pcie_portdrv_init);
+module_exit(pcie_portdrv_exit);
diff -Nru a/include/linux/pcieport_if.h b/include/linux/pcieport_if.h
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/include/linux/pcieport_if.h 2005-01-17 13:56:37 -08:00
@@ -0,0 +1,74 @@
+/*
+ * File: pcieport_if.h
+ * Purpose: PCI Express Port Bus Driver's IF Data Structure
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ */
+
+#ifndef _PCIEPORT_IF_H_
+#define _PCIEPORT_IF_H_
+
+/* Port Type */
+#define PCIE_RC_PORT 4 /* Root port of RC */
+#define PCIE_SW_UPSTREAM_PORT 5 /* Upstream port of Switch */
+#define PCIE_SW_DOWNSTREAM_PORT 6 /* Downstream port of Switch */
+#define PCIE_ANY_PORT 7
+
+/* Service Type */
+#define PCIE_PORT_SERVICE_PME 1 /* Power Management Event */
+#define PCIE_PORT_SERVICE_AER 2 /* Advanced Error Reporting */
+#define PCIE_PORT_SERVICE_HP 4 /* Native Hotplug */
+#define PCIE_PORT_SERVICE_VC 8 /* Virtual Channel */
+
+/* Root/Upstream/Downstream Port's Interrupt Mode */
+#define PCIE_PORT_INTx_MODE 0
+#define PCIE_PORT_MSI_MODE 1
+#define PCIE_PORT_MSIX_MODE 2
+
+struct pcie_port_service_id {
+ __u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
+ __u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
+ __u32 class, class_mask; /* (class,subclass,prog-if) triplet */
+ __u32 port_type, service_type; /* Port Entity */
+ kernel_ulong_t driver_data;
+};
+
+struct pcie_device {
+ int irq; /* Service IRQ/MSI/MSI-X Vector */
+ int interrupt_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
+ struct pcie_port_service_id id; /* Service ID */
+ struct pci_dev *port; /* Root/Upstream/Downstream Port */
+ void *priv_data; /* Service Private Data */
+ struct device device; /* Generic Device Interface */
+};
+#define to_pcie_device(d) container_of(d, struct pcie_device, device)
+
+static inline void set_service_data(struct pcie_device *dev, void *data)
+{
+ dev->priv_data = data;
+}
+
+static inline void* get_service_data(struct pcie_device *dev)
+{
+ return dev->priv_data;
+}
+
+struct pcie_port_service_driver {
+ const char *name;
+ int (*probe) (struct pcie_device *dev,
+ const struct pcie_port_service_id *id);
+ void (*remove) (struct pcie_device *dev);
+ int (*suspend) (struct pcie_device *dev, u32 state);
+ int (*resume) (struct pcie_device *dev);
+
+ const struct pcie_port_service_id *id_table;
+ struct device_driver driver;
+};
+#define to_service_driver(d) \
+ container_of(d, struct pcie_port_service_driver, driver)
+
+extern int pcie_port_service_register(struct pcie_port_service_driver *new);
+extern void pcie_port_service_unregister(struct pcie_port_service_driver *new);
+
+#endif /* _PCIEPORT_IF_H_ */

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