amdkfd: Add amdkfd skeleton driver
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
v6:
Update module version to the correct number and remove the "default m" from the
Kconfig file
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
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)
+{
+}