[PATCH v5 08/24] amdkfd: Add amdkfd skeleton driver

Oded Gabbay
2014-11-08T18:41:00Z

This patch adds the amdkfd skeleton driver. The driver does nothing except
define a /dev/kfd device.

It returns -ENODEV on all amdkfd IOCTLs.

v3: Move bool field to the end of structure, removed the pmc ioctls and added
a meaningful error message for ioctl error.

v5:

Create a new folder drm/amd and move amdkfd from drm/radeon/ to drm/amd/
Remove scheduler_class from kfd_priv.h as it was never used
Add skeleton implementation of the Get Version IOCTL

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
---
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/amd/amdkfd/Kconfig | 10 ++
drivers/gpu/drm/amd/amdkfd/Makefile | 9 ++
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 210 +++++++++++++++++++++++++++++++
drivers/gpu/drm/amd/amdkfd/kfd_device.c | 130 +++++++++++++++++++
drivers/gpu/drm/amd/amdkfd/kfd_module.c | 101 +++++++++++++++
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 81 ++++++++++++
8 files changed, 544 insertions(+)
create mode 100644 drivers/gpu/drm/amd/amdkfd/Kconfig
create mode 100644 drivers/gpu/drm/amd/amdkfd/Makefile
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_device.c
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_module.c
create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_priv.h

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index e3b4b0f..37c5a6e 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -200,3 +200,5 @@ source "drivers/gpu/drm/tegra/Kconfig"
source "drivers/gpu/drm/panel/Kconfig"

source "drivers/gpu/drm/sti/Kconfig"
+
+source "drivers/gpu/drm/amd/amdkfd/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 9292a76..46fd5e8 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -65,3 +65,4 @@ obj-$(CONFIG_DRM_STI) += sti/
obj-y += i2c/
obj-y += panel/
obj-y += bridge/
+obj-$(CONFIG_HSA_AMD) += amd/amdkfd/
diff --git a/drivers/gpu/drm/amd/amdkfd/Kconfig b/drivers/gpu/drm/amd/amdkfd/Kconfig
new file mode 100644
index 0000000..a2ae6d4
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/Kconfig
@@ -0,0 +1,10 @@
+#
+# Heterogenous system architecture configuration
+#
+
+config HSA_AMD
+ tristate "HSA kernel driver for AMD GPU devices"
+ depends on (DRM_RADEON || DRM_AMDGPU) && AMD_IOMMU_V2 && X86_64
+ default m
+ help
+ Enable this if you want to use HSA features on AMD GPU devices.
diff --git a/drivers/gpu/drm/amd/amdkfd/Makefile b/drivers/gpu/drm/amd/amdkfd/Makefile
new file mode 100644
index 0000000..d875ce4
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for Heterogenous System Architecture support for AMD GPU devices
+#
+
+ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/amd/include/
+
+amdkfd-y := kfd_module.o kfd_device.o kfd_chardev.o
+
+obj-$(CONFIG_HSA_AMD) += amdkfd.o
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
new file mode 100644
index 0000000..d7c32eb
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/compat.h>
+#include <uapi/linux/kfd_ioctl.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <uapi/asm-generic/mman-common.h>
+#include <asm/processor.h>
+#include "kfd_priv.h"
+
+static long kfd_ioctl(struct file *, unsigned int, unsigned long);
+static int kfd_open(struct inode *, struct file *);
+
+static const char kfd_dev_name[] = "kfd";
+
+static const struct file_operations kfd_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = kfd_ioctl,
+ .compat_ioctl = kfd_ioctl,
+ .open = kfd_open,
+};
+
+static int kfd_char_dev_major = -1;
+static struct class *kfd_class;
+struct device *kfd_device;
+
+int kfd_chardev_init(void)
+{
+ int err = 0;
+
+ kfd_char_dev_major = register_chrdev(0, kfd_dev_name, &kfd_fops);
+ err = kfd_char_dev_major;
+ if (err < 0)
+ goto err_register_chrdev;
+
+ kfd_class = class_create(THIS_MODULE, kfd_dev_name);
+ err = PTR_ERR(kfd_class);
+ if (IS_ERR(kfd_class))
+ goto err_class_create;
+
+ kfd_device = device_create(kfd_class, NULL,
+ MKDEV(kfd_char_dev_major, 0),
+ NULL, kfd_dev_name);
+ err = PTR_ERR(kfd_device);
+ if (IS_ERR(kfd_device))
+ goto err_device_create;
+
+ return 0;
+
+err_device_create:
+ class_destroy(kfd_class);
+err_class_create:
+ unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
+err_register_chrdev:
+ return err;
+}
+
+void kfd_chardev_exit(void)
+{
+ device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
+ class_destroy(kfd_class);
+ unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
+}
+
+struct device *kfd_chardev(void)
+{
+ return kfd_device;
+}
+
+
+static int kfd_open(struct inode *inode, struct file *filep)
+{
+ if (iminor(inode) != 0)
+ return -ENODEV;
+
+ return 0;
+}
+
+static long kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
+ void __user *arg)
+{
+ return -ENODEV;
+}
+
+static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
+ void __user *arg)
+{
+ return -ENODEV;
+}
+
+static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
+ void __user *arg)
+{
+ return -ENODEV;
+}
+
+static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
+ void __user *arg)
+{
+ return -ENODEV;
+}
+
+static long kfd_ioctl_set_memory_policy(struct file *filep,
+ struct kfd_process *p, void __user *arg)
+{
+ return -ENODEV;
+}
+
+static long kfd_ioctl_get_clock_counters(struct file *filep,
+ struct kfd_process *p, void __user *arg)
+{
+ return -ENODEV;
+}
+
+
+static int kfd_ioctl_get_process_apertures(struct file *filp,
+ struct kfd_process *p, void __user *arg)
+{
+ return -ENODEV;
+}
+
+static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+ struct kfd_process *process;
+ long err = -EINVAL;
+
+ dev_dbg(kfd_device,
+ "ioctl cmd 0x%x (#%d), arg 0x%lx\n",
+ cmd, _IOC_NR(cmd), arg);
+
+ /* TODO: add function that retrieves process */
+ process = NULL;
+
+ switch (cmd) {
+ case KFD_IOC_GET_VERSION:
+ err = kfd_ioctl_get_version(filep, process, (void __user *)arg);
+ break;
+ case KFD_IOC_CREATE_QUEUE:
+ err = kfd_ioctl_create_queue(filep, process,
+ (void __user *)arg);
+ break;
+
+ case KFD_IOC_DESTROY_QUEUE:
+ err = kfd_ioctl_destroy_queue(filep, process,
+ (void __user *)arg);
+ break;
+
+ case KFD_IOC_SET_MEMORY_POLICY:
+ err = kfd_ioctl_set_memory_policy(filep, process,
+ (void __user *)arg);
+ break;
+
+ case KFD_IOC_GET_CLOCK_COUNTERS:
+ err = kfd_ioctl_get_clock_counters(filep, process,
+ (void __user *)arg);
+ break;
+
+ case KFD_IOC_GET_PROCESS_APERTURES:
+ err = kfd_ioctl_get_process_apertures(filep, process,
+ (void __user *)arg);
+ break;
+
+ case KFD_IOC_UPDATE_QUEUE:
+ err = kfd_ioctl_update_queue(filep, process,
+ (void __user *)arg);
+ break;
+
+ default:
+ dev_err(kfd_device,
+ "unknown ioctl cmd 0x%x, arg 0x%lx)\n",
+ cmd, arg);
+ err = -EINVAL;
+ break;
+ }
+
+ if (err < 0)
+ dev_err(kfd_device,
+ "ioctl error %ld for ioctl cmd 0x%x (#%d)\n",
+ err, cmd, _IOC_NR(cmd));
+
+ return err;
+}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
new file mode 100644
index 0000000..d81a58e
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/amd-iommu.h>
+#include <linux/bsearch.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include "kfd_priv.h"
+
+static const struct kfd_device_info kaveri_device_info = {
+ .max_pasid_bits = 16,
+};
+
+struct kfd_deviceid {
+ unsigned short did;
+ const struct kfd_device_info *device_info;
+};
+
+/* Please keep this sorted by increasing device id. */
+static const struct kfd_deviceid supported_devices[] = {
+ { 0x1304, &kaveri_device_info }, /* Kaveri */
+ { 0x1305, &kaveri_device_info }, /* Kaveri */
+ { 0x1306, &kaveri_device_info }, /* Kaveri */
+ { 0x1307, &kaveri_device_info }, /* Kaveri */
+ { 0x1309, &kaveri_device_info }, /* Kaveri */
+ { 0x130A, &kaveri_device_info }, /* Kaveri */
+ { 0x130B, &kaveri_device_info }, /* Kaveri */
+ { 0x130C, &kaveri_device_info }, /* Kaveri */
+ { 0x130D, &kaveri_device_info }, /* Kaveri */
+ { 0x130E, &kaveri_device_info }, /* Kaveri */
+ { 0x130F, &kaveri_device_info }, /* Kaveri */
+ { 0x1310, &kaveri_device_info }, /* Kaveri */
+ { 0x1311, &kaveri_device_info }, /* Kaveri */
+ { 0x1312, &kaveri_device_info }, /* Kaveri */
+ { 0x1313, &kaveri_device_info }, /* Kaveri */
+ { 0x1315, &kaveri_device_info }, /* Kaveri */
+ { 0x1316, &kaveri_device_info }, /* Kaveri */
+ { 0x1317, &kaveri_device_info }, /* Kaveri */
+ { 0x1318, &kaveri_device_info }, /* Kaveri */
+ { 0x131B, &kaveri_device_info }, /* Kaveri */
+ { 0x131C, &kaveri_device_info }, /* Kaveri */
+ { 0x131D, &kaveri_device_info }, /* Kaveri */
+};
+
+static const struct kfd_device_info *lookup_device_info(unsigned short did)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
+ if (supported_devices[i].did == did) {
+ BUG_ON(supported_devices[i].device_info == NULL);
+ return supported_devices[i].device_info;
+ }
+ }
+
+ return NULL;
+}
+
+struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev)
+{
+ struct kfd_dev *kfd;
+
+ const struct kfd_device_info *device_info =
+ lookup_device_info(pdev->device);
+
+ if (!device_info)
+ return NULL;
+
+ kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
+ if (!kfd)
+ return NULL;
+
+ kfd->kgd = kgd;
+ kfd->device_info = device_info;
+ kfd->pdev = pdev;
+
+ return kfd;
+}
+
+bool kgd2kfd_device_init(struct kfd_dev *kfd,
+ const struct kgd2kfd_shared_resources *gpu_resources)
+{
+ kfd->shared_resources = *gpu_resources;
+
+ kfd->init_complete = true;
+ dev_info(kfd_device, "added device (%x:%x)\n", kfd->pdev->vendor,
+ kfd->pdev->device);
+
+ return true;
+}
+
+void kgd2kfd_device_exit(struct kfd_dev *kfd)
+{
+ kfree(kfd);
+}
+
+void kgd2kfd_suspend(struct kfd_dev *kfd)
+{
+ BUG_ON(kfd == NULL);
+}
+
+int kgd2kfd_resume(struct kfd_dev *kfd)
+{
+ BUG_ON(kfd == NULL);
+
+ return 0;
+}
+
+void kgd2kfd_interrupt(struct kfd_dev *dev, const void *ih_ring_entry)
+{
+}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
new file mode 100644
index 0000000..626ead4
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/notifier.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include "kfd_priv.h"
+
+#define KFD_DRIVER_AUTHOR "AMD Inc. and others"
+
+#define KFD_DRIVER_DESC "Standalone HSA driver for AMD's GPUs"
+#define KFD_DRIVER_DATE "20140804"
+#define KFD_DRIVER_MAJOR 0
+#define KFD_DRIVER_MINOR 6
+#define KFD_DRIVER_PATCHLEVEL 4
+
+const struct kfd2kgd_calls *kfd2kgd;
+static const struct kgd2kfd_calls kgd2kfd = {
+ .exit = kgd2kfd_exit,
+ .probe = kgd2kfd_probe,
+ .device_init = kgd2kfd_device_init,
+ .device_exit = kgd2kfd_device_exit,
+ .interrupt = kgd2kfd_interrupt,
+ .suspend = kgd2kfd_suspend,
+ .resume = kgd2kfd_resume,
+};
+
+bool kgd2kfd_init(unsigned interface_version,
+ const struct kfd2kgd_calls *f2g,
+ const struct kgd2kfd_calls **g2f)
+{
+ /*
+ * Only one interface version is supported,
+ * no kfd/kgd version skew allowed.
+ */
+ if (interface_version != KFD_INTERFACE_VERSION)
+ return false;
+
+ kfd2kgd = f2g;
+ *g2f = &kgd2kfd;
+
+ return true;
+}
+EXPORT_SYMBOL(kgd2kfd_init);
+
+void kgd2kfd_exit(void)
+{
+}
+
+static int __init kfd_module_init(void)
+{
+ int err;
+
+ err = kfd_chardev_init();
+ if (err < 0)
+ goto err_ioctl;
+
+ dev_info(kfd_device, "Initialized module\n");
+
+ return 0;
+
+err_ioctl:
+ return err;
+}
+
+static void __exit kfd_module_exit(void)
+{
+ kfd_chardev_exit();
+ dev_info(kfd_device, "Removed module\n");
+}
+
+module_init(kfd_module_init);
+module_exit(kfd_module_exit);
+
+MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
+MODULE_DESCRIPTION(KFD_DRIVER_DESC);
+MODULE_LICENSE("GPL and additional rights");
+MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
+ __stringify(KFD_DRIVER_MINOR) "."
+ __stringify(KFD_DRIVER_PATCHLEVEL));
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
new file mode 100644
index 0000000..219a0d3
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef KFD_PRIV_H_INCLUDED
+#define KFD_PRIV_H_INCLUDED
+
+#include <linux/hashtable.h>
+#include <linux/mmu_notifier.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+#include <linux/atomic.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <kgd_kfd_interface.h>
+
+struct kfd_device_info {
+ unsigned int max_pasid_bits;
+ size_t ih_ring_entry_size;
+};
+
+struct kfd_dev {
+ struct kgd_dev *kgd;
+
+ const struct kfd_device_info *device_info;
+ struct pci_dev *pdev;
+
+ unsigned int id; /* topology stub index */
+
+ struct kgd2kfd_shared_resources shared_resources;
+
+ bool init_complete;
+
+};
+
+/* KGD2KFD callbacks */
+void kgd2kfd_exit(void);
+struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev);
+bool kgd2kfd_device_init(struct kfd_dev *kfd,
+ const struct kgd2kfd_shared_resources *gpu_resources);
+void kgd2kfd_device_exit(struct kfd_dev *kfd);
+
+extern const struct kfd2kgd_calls *kfd2kgd;
+
+/* Character device interface */
+int kfd_chardev_init(void);
+void kfd_chardev_exit(void);
+struct device *kfd_chardev(void);
+
+/* Process data */
+struct kfd_process {
+};
+
+extern struct device *kfd_device;
+
+/* Interrupts */
+void kgd2kfd_interrupt(struct kfd_dev *dev, const void *ih_ring_entry);
+
+/* Power Management */
+void kgd2kfd_suspend(struct kfd_dev *dev);
+int kgd2kfd_resume(struct kfd_dev *dev);
+
+#endif
--
2.1.0