[PATCH v5 13/34] misc: xlink-pcie: rh: Add PCIe EP driver for Remote Host

[mgross]

From: Srikanth Thokala <srikanth.thokala@xxxxxxxxx>

Add PCIe Endpoint driver that configures PCIe BARs and MSIs on the
Remote Host

Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Mark Gross <mgross@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Gross <mgross@xxxxxxxxxxxxxxx>
Signed-off-by: Srikanth Thokala <srikanth.thokala@xxxxxxxxx>
---
 MAINTAINERS                                  |   2 +-
 drivers/misc/xlink-pcie/Kconfig              |  11 +
 drivers/misc/xlink-pcie/Makefile             |   1 +
 drivers/misc/xlink-pcie/common/xpcie.h       |   1 +
 drivers/misc/xlink-pcie/remote_host/Makefile |   3 +
 drivers/misc/xlink-pcie/remote_host/main.c   |  90 ++++
 drivers/misc/xlink-pcie/remote_host/pci.c    | 449 +++++++++++++++++++
 drivers/misc/xlink-pcie/remote_host/pci.h    |  62 +++
 8 files changed, 618 insertions(+), 1 deletion(-)
 create mode 100644 drivers/misc/xlink-pcie/remote_host/Makefile
 create mode 100644 drivers/misc/xlink-pcie/remote_host/main.c
 create mode 100644 drivers/misc/xlink-pcie/remote_host/pci.c
 create mode 100644 drivers/misc/xlink-pcie/remote_host/pci.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 1154d3e6b359..1d825e6c3c53 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1961,7 +1961,7 @@ F:	Documentation/devicetree/bindings/arm/intel,keembay.yaml
 F:	arch/arm64/boot/dts/intel/keembay-evm.dts
 F:	arch/arm64/boot/dts/intel/keembay-soc.dtsi
 
-ARM KEEM BAY XLINK PCIE SUPPORT
+ARM/INTEL KEEM BAY XLINK PCIE SUPPORT
 M:	Srikanth Thokala <srikanth.thokala@xxxxxxxxx>
 M:	Mark Gross <mgross@xxxxxxxxxxxxxxx>
 S:	Supported
diff --git a/drivers/misc/xlink-pcie/Kconfig b/drivers/misc/xlink-pcie/Kconfig
index 46aa401d79b7..448b9bfbdfa2 100644
--- a/drivers/misc/xlink-pcie/Kconfig
+++ b/drivers/misc/xlink-pcie/Kconfig
@@ -1,3 +1,14 @@
+config XLINK_PCIE_RH_DRIVER
+	tristate "XLink PCIe Remote Host driver"
+	depends on PCI && X86_64
+	help
+	  This option enables XLink PCIe Remote Host driver.
+
+	  Choose M here to compile this driver as a module, name is mxlk.
+	  This driver is used for XLink communication over PCIe,
+	  and is to be loaded on the IA host which is connected to
+	  the Intel Keem Bay.
+
 config XLINK_PCIE_LH_DRIVER
 	tristate "XLink PCIe Local Host driver"
 	depends on PCI_ENDPOINT && ARCH_KEEMBAY
diff --git a/drivers/misc/xlink-pcie/Makefile b/drivers/misc/xlink-pcie/Makefile
index d693d382e9c6..1dd984d8d88c 100644
--- a/drivers/misc/xlink-pcie/Makefile
+++ b/drivers/misc/xlink-pcie/Makefile
@@ -1 +1,2 @@
+obj-$(CONFIG_XLINK_PCIE_RH_DRIVER) += remote_host/
 obj-$(CONFIG_XLINK_PCIE_LH_DRIVER) += local_host/
diff --git a/drivers/misc/xlink-pcie/common/xpcie.h b/drivers/misc/xlink-pcie/common/xpcie.h
index 48529eb49be0..b5cf9242a59a 100644
--- a/drivers/misc/xlink-pcie/common/xpcie.h
+++ b/drivers/misc/xlink-pcie/common/xpcie.h
@@ -69,6 +69,7 @@ struct xpcie_mmio {
 struct xpcie {
 	u32 status;
 	bool legacy_a0;
+	void *bar0;
 	void *mmio;
 	void *bar4;
 
diff --git a/drivers/misc/xlink-pcie/remote_host/Makefile b/drivers/misc/xlink-pcie/remote_host/Makefile
new file mode 100644
index 000000000000..96374a43023e
--- /dev/null
+++ b/drivers/misc/xlink-pcie/remote_host/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_XLINK_PCIE_RH_DRIVER) += mxlk.o
+mxlk-objs := main.o
+mxlk-objs += pci.o
diff --git a/drivers/misc/xlink-pcie/remote_host/main.c b/drivers/misc/xlink-pcie/remote_host/main.c
new file mode 100644
index 000000000000..ed1a431ed5d4
--- /dev/null
+++ b/drivers/misc/xlink-pcie/remote_host/main.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Keem Bay XLink PCIe Driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+#include "pci.h"
+#include "../common/core.h"
+
+#define HW_ID_LO_MASK	GENMASK(7, 0)
+#define HW_ID_HI_MASK	GENMASK(15, 8)
+
+static const struct pci_device_id xpcie_pci_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KEEMBAY), 0 },
+	{ 0 }
+};
+
+static int intel_xpcie_probe(struct pci_dev *pdev,
+			     const struct pci_device_id *ent)
+{
+	bool new_device = false;
+	struct xpcie_dev *xdev;
+	u32 sw_devid;
+	u16 hw_id;
+	int ret;
+
+	hw_id = FIELD_PREP(HW_ID_HI_MASK, pdev->bus->number) |
+		FIELD_PREP(HW_ID_LO_MASK, PCI_SLOT(pdev->devfn));
+
+	sw_devid = FIELD_PREP(XLINK_DEV_INF_TYPE_MASK,
+			      XLINK_DEV_INF_PCIE) |
+		   FIELD_PREP(XLINK_DEV_PHYS_ID_MASK, hw_id) |
+		   FIELD_PREP(XLINK_DEV_TYPE_MASK, XLINK_DEV_TYPE_KMB) |
+		   FIELD_PREP(XLINK_DEV_PCIE_ID_MASK, XLINK_DEV_PCIE_0) |
+		   FIELD_PREP(XLINK_DEV_FUNC_MASK, XLINK_DEV_FUNC_VPU);
+
+	xdev = intel_xpcie_get_device_by_id(sw_devid);
+	if (!xdev) {
+		xdev = intel_xpcie_create_device(sw_devid, pdev);
+		if (!xdev)
+			return -ENOMEM;
+
+		new_device = true;
+	}
+
+	ret = intel_xpcie_pci_init(xdev, pdev);
+	if (ret) {
+		intel_xpcie_remove_device(xdev);
+		return ret;
+	}
+
+	if (new_device)
+		intel_xpcie_list_add_device(xdev);
+
+	return ret;
+}
+
+static void intel_xpcie_remove(struct pci_dev *pdev)
+{
+	struct xpcie_dev *xdev = pci_get_drvdata(pdev);
+
+	if (xdev) {
+		intel_xpcie_pci_cleanup(xdev);
+		intel_xpcie_remove_device(xdev);
+	}
+}
+
+static struct pci_driver xpcie_driver = {
+	.name = XPCIE_DRIVER_NAME,
+	.id_table = xpcie_pci_table,
+	.probe = intel_xpcie_probe,
+	.remove = intel_xpcie_remove
+};
+
+static int __init intel_xpcie_init_module(void)
+{
+	return pci_register_driver(&xpcie_driver);
+}
+
+static void __exit intel_xpcie_exit_module(void)
+{
+	pci_unregister_driver(&xpcie_driver);
+}
+
+module_init(intel_xpcie_init_module);
+module_exit(intel_xpcie_exit_module);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION(XPCIE_DRIVER_DESC);
diff --git a/drivers/misc/xlink-pcie/remote_host/pci.c b/drivers/misc/xlink-pcie/remote_host/pci.c
new file mode 100644
index 000000000000..7b94575ef997
--- /dev/null
+++ b/drivers/misc/xlink-pcie/remote_host/pci.c
@@ -0,0 +1,449 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Keem Bay XLink PCIe Driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+
+#include "pci.h"
+
+#include "../common/core.h"
+#include "../common/util.h"
+
+static int aspm_enable;
+module_param(aspm_enable, int, 0664);
+MODULE_PARM_DESC(aspm_enable, "enable ASPM");
+
+static LIST_HEAD(dev_list);
+static DEFINE_MUTEX(dev_list_mutex);
+
+struct xpcie_dev *intel_xpcie_get_device_by_id(u32 id)
+{
+	struct xpcie_dev *xdev;
+
+	mutex_lock(&dev_list_mutex);
+
+	if (list_empty(&dev_list)) {
+		mutex_unlock(&dev_list_mutex);
+		return NULL;
+	}
+
+	list_for_each_entry(xdev, &dev_list, list) {
+		if (xdev->devid == id) {
+			mutex_unlock(&dev_list_mutex);
+			return xdev;
+		}
+	}
+
+	mutex_unlock(&dev_list_mutex);
+
+	return NULL;
+}
+
+struct xpcie_dev *intel_xpcie_create_device(u32 sw_device_id,
+					    struct pci_dev *pdev)
+{
+	struct xpcie_dev *xdev = kzalloc(sizeof(*xdev), GFP_KERNEL);
+
+	if (!xdev)
+		return NULL;
+
+	xdev->devid = sw_device_id;
+	snprintf(xdev->name, XPCIE_MAX_NAME_LEN, "%02x:%02x.%x",
+		 pdev->bus->number,
+		 PCI_SLOT(pdev->devfn),
+		 PCI_FUNC(pdev->devfn));
+
+	mutex_init(&xdev->lock);
+
+	return xdev;
+}
+
+void intel_xpcie_remove_device(struct xpcie_dev *xdev)
+{
+	mutex_destroy(&xdev->lock);
+	kfree(xdev);
+}
+
+void intel_xpcie_list_add_device(struct xpcie_dev *xdev)
+{
+	mutex_lock(&dev_list_mutex);
+
+	list_add_tail(&xdev->list, &dev_list);
+
+	mutex_unlock(&dev_list_mutex);
+}
+
+void intel_xpcie_list_del_device(struct xpcie_dev *xdev)
+{
+	mutex_lock(&dev_list_mutex);
+
+	list_del(&xdev->list);
+
+	mutex_unlock(&dev_list_mutex);
+}
+
+static void intel_xpcie_pci_set_aspm(struct xpcie_dev *xdev, int aspm)
+{
+	u16 link_control;
+	u8 cap_exp;
+
+	cap_exp = pci_find_capability(xdev->pci, PCI_CAP_ID_EXP);
+	if (!cap_exp) {
+		dev_err(&xdev->pci->dev, "failed to find pcie capability\n");
+		return;
+	}
+
+	pci_read_config_word(xdev->pci, cap_exp + PCI_EXP_LNKCTL,
+			     &link_control);
+	link_control &= ~(PCI_EXP_LNKCTL_ASPMC);
+	link_control |= (aspm & PCI_EXP_LNKCTL_ASPMC);
+	pci_write_config_word(xdev->pci, cap_exp + PCI_EXP_LNKCTL,
+			      link_control);
+}
+
+static void intel_xpcie_pci_unmap_bar(struct xpcie_dev *xdev)
+{
+	if (xdev->xpcie.bar0) {
+		iounmap((void __iomem *)xdev->xpcie.bar0);
+		xdev->xpcie.bar0 = NULL;
+	}
+
+	if (xdev->xpcie.mmio) {
+		iounmap((void __iomem *)(xdev->xpcie.mmio - XPCIE_MMIO_OFFSET));
+		xdev->xpcie.mmio = NULL;
+	}
+
+	if (xdev->xpcie.bar4) {
+		iounmap((void __iomem *)xdev->xpcie.bar4);
+		xdev->xpcie.bar4 = NULL;
+	}
+}
+
+static int intel_xpcie_pci_map_bar(struct xpcie_dev *xdev)
+{
+	if (pci_resource_len(xdev->pci, 2) < XPCIE_IO_COMM_SIZE) {
+		dev_err(&xdev->pci->dev, "device BAR region is too small\n");
+		return -EIO;
+	}
+
+	xdev->xpcie.bar0 = (void __force *)pci_ioremap_bar(xdev->pci, 0);
+	if (!xdev->xpcie.bar0) {
+		dev_err(&xdev->pci->dev, "failed to ioremap BAR0\n");
+		goto bar_error;
+	}
+
+	xdev->xpcie.mmio = (void __force *)
+			   (pci_ioremap_bar(xdev->pci, 2) + XPCIE_MMIO_OFFSET);
+	if (!xdev->xpcie.mmio) {
+		dev_err(&xdev->pci->dev, "failed to ioremap BAR2\n");
+		goto bar_error;
+	}
+
+	xdev->xpcie.bar4 = (void __force *)pci_ioremap_wc_bar(xdev->pci, 4);
+	if (!xdev->xpcie.bar4) {
+		dev_err(&xdev->pci->dev, "failed to ioremap BAR4\n");
+		goto bar_error;
+	}
+
+	return 0;
+
+bar_error:
+	intel_xpcie_pci_unmap_bar(xdev);
+	return -EIO;
+}
+
+static void intel_xpcie_pci_irq_cleanup(struct xpcie_dev *xdev)
+{
+	int irq = pci_irq_vector(xdev->pci, 0);
+
+	if (irq < 0)
+		return;
+
+	synchronize_irq(irq);
+	free_irq(irq, xdev);
+	pci_free_irq_vectors(xdev->pci);
+}
+
+static int intel_xpcie_pci_irq_init(struct xpcie_dev *xdev,
+				    irq_handler_t irq_handler)
+{
+	int rc, irq;
+
+	rc = pci_alloc_irq_vectors(xdev->pci, 1, 1, PCI_IRQ_MSI);
+	if (rc < 0) {
+		dev_err(&xdev->pci->dev,
+			"failed to allocate %d MSI vectors\n", 1);
+		return rc;
+	}
+
+	irq = pci_irq_vector(xdev->pci, 0);
+	if (irq < 0) {
+		dev_err(&xdev->pci->dev, "failed to get irq\n");
+		rc = irq;
+		goto error_irq;
+	}
+	rc = request_irq(irq, irq_handler, 0,
+			 XPCIE_DRIVER_NAME, xdev);
+	if (rc) {
+		dev_err(&xdev->pci->dev, "failed to request irq\n");
+		goto error_irq;
+	}
+
+	return 0;
+
+error_irq:
+	pci_free_irq_vectors(xdev->pci);
+	return rc;
+}
+
+static void xpcie_device_poll(struct work_struct *work)
+{
+	struct xpcie_dev *xdev = container_of(work, struct xpcie_dev,
+					      wait_event.work);
+	u32 dev_status = intel_xpcie_ioread32(xdev->xpcie.mmio +
+					      XPCIE_MMIO_DEV_STATUS);
+
+	if (dev_status < XPCIE_STATUS_RUN)
+		schedule_delayed_work(&xdev->wait_event,
+				      msecs_to_jiffies(100));
+	else
+		xdev->xpcie.status = XPCIE_STATUS_READY;
+}
+
+static int intel_xpcie_pci_prepare_dev_reset(struct xpcie_dev *xdev,
+					     bool notify)
+{
+	if (mutex_lock_interruptible(&xdev->lock))
+		return -EINTR;
+
+	if (xdev->core_irq_callback)
+		xdev->core_irq_callback = NULL;
+
+	xdev->xpcie.status = XPCIE_STATUS_OFF;
+	if (notify)
+		intel_xpcie_pci_raise_irq(xdev, DEV_EVENT, REQUEST_RESET);
+
+	mutex_unlock(&xdev->lock);
+
+	return 0;
+}
+
+static void xpcie_device_shutdown(struct work_struct *work)
+{
+	struct xpcie_dev *xdev = container_of(work, struct xpcie_dev,
+					      shutdown_event.work);
+
+	intel_xpcie_pci_prepare_dev_reset(xdev, false);
+}
+
+static int xpcie_device_init(struct xpcie_dev *xdev)
+{
+	INIT_DELAYED_WORK(&xdev->wait_event, xpcie_device_poll);
+	INIT_DELAYED_WORK(&xdev->shutdown_event, xpcie_device_shutdown);
+
+	pci_set_master(xdev->pci);
+
+	xdev->xpcie.status = XPCIE_STATUS_UNINIT;
+
+	init_waitqueue_head(&xdev->waitqueue);
+	schedule_delayed_work(&xdev->wait_event, 0);
+
+	return 0;
+}
+
+int intel_xpcie_pci_init(struct xpcie_dev *xdev, struct pci_dev *pdev)
+{
+	int rc;
+
+	if (mutex_lock_interruptible(&xdev->lock))
+		return -EINTR;
+
+	xdev->pci = pdev;
+	pci_set_drvdata(pdev, xdev);
+
+	rc = pci_enable_device_mem(xdev->pci);
+	if (rc) {
+		dev_err(&pdev->dev, "failed to enable pci device\n");
+		goto error_exit;
+	}
+
+	rc = pci_request_regions(xdev->pci, XPCIE_DRIVER_NAME);
+	if (rc) {
+		dev_err(&pdev->dev, "failed to request mmio regions\n");
+		goto error_req_mem;
+	}
+
+	rc = intel_xpcie_pci_map_bar(xdev);
+	if (rc)
+		goto error_map;
+
+	rc = dma_set_mask_and_coherent(&xdev->pci->dev, DMA_BIT_MASK(64));
+	if (rc) {
+		dev_err(&pdev->dev, "failed to set dma mask\n");
+		goto error_dma_mask;
+	}
+
+	intel_xpcie_pci_set_aspm(xdev, aspm_enable);
+
+	rc = xpcie_device_init(xdev);
+	if (!rc)
+		goto init_exit;
+
+error_dma_mask:
+	intel_xpcie_pci_unmap_bar(xdev);
+
+error_map:
+	pci_release_regions(xdev->pci);
+
+error_req_mem:
+	pci_disable_device(xdev->pci);
+
+error_exit:
+	xdev->xpcie.status = XPCIE_STATUS_ERROR;
+
+init_exit:
+	mutex_unlock(&xdev->lock);
+	if (rc)
+		mutex_destroy(&xdev->lock);
+	return rc;
+}
+
+int intel_xpcie_pci_cleanup(struct xpcie_dev *xdev)
+{
+	if (mutex_lock_interruptible(&xdev->lock))
+		return -EINTR;
+
+	cancel_delayed_work(&xdev->wait_event);
+	cancel_delayed_work(&xdev->shutdown_event);
+	xdev->core_irq_callback = NULL;
+	intel_xpcie_pci_irq_cleanup(xdev);
+
+	intel_xpcie_pci_unmap_bar(xdev);
+	pci_release_regions(xdev->pci);
+	pci_disable_device(xdev->pci);
+	pci_set_drvdata(xdev->pci, NULL);
+	xdev->xpcie.status = XPCIE_STATUS_OFF;
+	xdev->irq_enabled = false;
+
+	mutex_unlock(&xdev->lock);
+
+	return 0;
+}
+
+int intel_xpcie_pci_register_irq(struct xpcie_dev *xdev,
+				 irq_handler_t irq_handler)
+{
+	int rc;
+
+	if (xdev->xpcie.status != XPCIE_STATUS_READY)
+		return -EINVAL;
+
+	rc = intel_xpcie_pci_irq_init(xdev, irq_handler);
+	if (rc)
+		dev_warn(&xdev->pci->dev, "failed to initialize pci irq\n");
+
+	return rc;
+}
+
+int intel_xpcie_pci_raise_irq(struct xpcie_dev *xdev,
+			      enum xpcie_doorbell_type type,
+			      u8 value)
+{
+	u16 pci_status;
+
+	pci_read_config_word(xdev->pci, PCI_STATUS, &pci_status);
+
+	return 0;
+}
+
+u32 intel_xpcie_get_device_num(u32 *id_list)
+{
+	struct xpcie_dev *p;
+	u32 num = 0;
+
+	mutex_lock(&dev_list_mutex);
+
+	if (list_empty(&dev_list)) {
+		mutex_unlock(&dev_list_mutex);
+		return 0;
+	}
+
+	list_for_each_entry(p, &dev_list, list) {
+		*id_list++ = p->devid;
+		num++;
+	}
+	mutex_unlock(&dev_list_mutex);
+
+	return num;
+}
+
+int intel_xpcie_get_device_name_by_id(u32 id,
+				      char *device_name, size_t name_size)
+{
+	struct xpcie_dev *xdev;
+	size_t size;
+
+	xdev = intel_xpcie_get_device_by_id(id);
+	if (!xdev)
+		return -ENODEV;
+
+	mutex_lock(&xdev->lock);
+
+	size = (name_size > XPCIE_MAX_NAME_LEN) ?
+		XPCIE_MAX_NAME_LEN : name_size;
+	memcpy(device_name, xdev->name, size);
+
+	mutex_unlock(&xdev->lock);
+
+	return 0;
+}
+
+int intel_xpcie_get_device_status_by_id(u32 id, u32 *status)
+{
+	struct xpcie_dev *xdev = intel_xpcie_get_device_by_id(id);
+
+	if (!xdev)
+		return -ENODEV;
+
+	mutex_lock(&xdev->lock);
+	*status = xdev->xpcie.status;
+	mutex_unlock(&xdev->lock);
+
+	return 0;
+}
+
+int intel_xpcie_pci_connect_device(u32 id)
+{
+	struct xpcie_dev *xdev;
+	int rc = 0;
+
+	xdev = intel_xpcie_get_device_by_id(id);
+	if (!xdev)
+		return -ENODEV;
+
+	if (mutex_lock_interruptible(&xdev->lock))
+		return -EINTR;
+
+	if (xdev->xpcie.status == XPCIE_STATUS_RUN)
+		goto connect_cleanup;
+
+	if (xdev->xpcie.status == XPCIE_STATUS_OFF) {
+		rc = -ENODEV;
+		goto connect_cleanup;
+	}
+
+	if (xdev->xpcie.status != XPCIE_STATUS_READY) {
+		rc = -EBUSY;
+		goto connect_cleanup;
+	}
+
+connect_cleanup:
+	mutex_unlock(&xdev->lock);
+	return rc;
+}
diff --git a/drivers/misc/xlink-pcie/remote_host/pci.h b/drivers/misc/xlink-pcie/remote_host/pci.h
new file mode 100644
index 000000000000..bd6b01cc58b8
--- /dev/null
+++ b/drivers/misc/xlink-pcie/remote_host/pci.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Intel Keem Bay XLink PCIe Driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+#ifndef XPCIE_PCI_HEADER_
+#define XPCIE_PCI_HEADER_
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/xlink_drv_inf.h>
+#include "../common/xpcie.h"
+#include "../common/util.h"
+
+#define XPCIE_DRIVER_NAME "mxlk"
+#define XPCIE_DRIVER_DESC "Intel(R) Keem Bay XLink PCIe driver"
+
+#define XPCIE_MAX_NAME_LEN	(32)
+
+struct xpcie_dev {
+	struct list_head list;
+	struct mutex lock; /* Device Lock */
+
+	struct pci_dev *pci;
+	char name[XPCIE_MAX_NAME_LEN];
+	u32 devid;
+	char fw_name[XPCIE_MAX_NAME_LEN];
+
+	struct delayed_work wait_event;
+	struct delayed_work shutdown_event;
+	wait_queue_head_t waitqueue;
+	bool irq_enabled;
+	irq_handler_t core_irq_callback;
+
+	struct xpcie xpcie;
+};
+
+static inline struct device *xpcie_to_dev(struct xpcie *xpcie)
+{
+	struct xpcie_dev *xdev = container_of(xpcie, struct xpcie_dev, xpcie);
+
+	return &xdev->pci->dev;
+}
+
+int intel_xpcie_pci_init(struct xpcie_dev *xdev, struct pci_dev *pdev);
+int intel_xpcie_pci_cleanup(struct xpcie_dev *xdev);
+int intel_xpcie_pci_register_irq(struct xpcie_dev *xdev,
+				 irq_handler_t irq_handler);
+int intel_xpcie_pci_raise_irq(struct xpcie_dev *xdev,
+			      enum xpcie_doorbell_type type,
+			      u8 value);
+
+struct xpcie_dev *intel_xpcie_create_device(u32 sw_device_id,
+					    struct pci_dev *pdev);
+void intel_xpcie_remove_device(struct xpcie_dev *xdev);
+void intel_xpcie_list_add_device(struct xpcie_dev *xdev);
+void intel_xpcie_list_del_device(struct xpcie_dev *xdev);
+
+#endif /* XPCIE_PCI_HEADER_ */
-- 
2.17.1