drm_gem_shmem_object is base for memory objects provided by the patch
Signed-off-by: Maciej Kwapulinski <maciej.kwapulinski@xxxxxxxxxxxxxxx>
Tested-by: Mikolaj Grzybowski <mikolajx.grzybowski@xxxxxxxxx>
---
drivers/gpu/drm/gna/Kconfig | 1 +
drivers/gpu/drm/gna/gna_device.c | 27 +++++++++++-
drivers/gpu/drm/gna/gna_device.h | 13 ++++++
drivers/gpu/drm/gna/gna_gem.h | 15 +++++++
drivers/gpu/drm/gna/gna_ioctl.c | 70 ++++++++++++++++++++++++++++++++
include/uapi/drm/gna_drm.h | 23 +++++++++++
6 files changed, 148 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/gna/gna_gem.h
diff --git a/drivers/gpu/drm/gna/Kconfig b/drivers/gpu/drm/gna/Kconfig
index e56b933458dc..6c32716bf43a 100644
--- a/drivers/gpu/drm/gna/Kconfig
+++ b/drivers/gpu/drm/gna/Kconfig
@@ -6,6 +6,7 @@ config DRM_GNA
tristate "Intel(R) Gaussian & Neural Accelerator (Intel(R) GNA)"
depends on X86 && PCI
depends on DRM
+ select DRM_GEM_SHMEM_HELPER
help
This option enables the Intel(R) Gaussian & Neural Accelerator
(Intel(R) GNA) driver: gna
diff --git a/drivers/gpu/drm/gna/gna_device.c b/drivers/gpu/drm/gna/gna_device.c
index 592478bca526..ab9e16121dcf 100644
--- a/drivers/gpu/drm/gna/gna_device.c
+++ b/drivers/gpu/drm/gna/gna_device.c
@@ -3,20 +3,27 @@
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
+#include <drm/drm_gem.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <uapi/drm/gna_drm.h>
#include "gna_device.h"
+#include "gna_gem.h"
#define GNA_DDI_VERSION_CURRENT GNA_DDI_VERSION_3
+DEFINE_DRM_GEM_FOPS(gna_drm_fops);
+
static const struct drm_ioctl_desc gna_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(GNA_GET_PARAMETER, gna_getparam_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(GNA_GEM_NEW, gna_gem_new_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(GNA_GEM_FREE, gna_gem_free_ioctl, DRM_RENDER_ALLOW),
};
@@ -36,10 +43,28 @@ static int gna_drm_dev_init(struct drm_device *dev)
return drmm_add_action_or_reset(dev, gna_drm_dev_fini, NULL);
}
+static struct drm_gem_object *gna_create_gem_object(struct drm_device *dev,
+ size_t size)
+{
+ struct drm_gem_shmem_object *dshmem;
+ struct gna_gem_object *shmem;
+
+ shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
+ if (!shmem)
+ return NULL;
+
+ dshmem = &shmem->base;
+
+ return &dshmem->base;
+}
+
static const struct drm_driver gna_drm_driver = {
- .driver_features = DRIVER_RENDER,
+ .driver_features = DRIVER_GEM | DRIVER_RENDER,
+ .gem_create_object = gna_create_gem_object,
+
.ioctls = gna_drm_ioctls,
.num_ioctls = ARRAY_SIZE(gna_drm_ioctls),
+ .fops = &gna_drm_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
diff --git a/drivers/gpu/drm/gna/gna_device.h b/drivers/gpu/drm/gna/gna_device.h
index 035c627e33b7..329729f392d8 100644
--- a/drivers/gpu/drm/gna/gna_device.h
+++ b/drivers/gpu/drm/gna/gna_device.h
@@ -5,10 +5,12 @@
#define __GNA_DEVICE_H__
#include <drm/drm_device.h>
+#include <drm/drm_gem_shmem_helper.h>
#include <linux/io.h>
#include <linux/types.h>
+#include "gna_gem.h"
#include "gna_hw.h"
#include "gna_mem.h"
@@ -43,6 +45,12 @@ int gna_getparam(struct gna_device *gna_priv, union gna_parameter *param);
int gna_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
+int gna_gem_new_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+
+int gna_gem_free_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+
static inline u32 gna_reg_read(struct gna_device *gna_priv, u32 reg)
{
return readl(gna_priv->iobase + reg);
@@ -58,4 +66,9 @@ static inline struct gna_device *to_gna_device(struct drm_device *dev)
return container_of(dev, struct gna_device, drm);
}
+static inline struct gna_gem_object *to_gna_gem_obj(struct drm_gem_shmem_object *drm_gem_shmem)
+{
+ return container_of(drm_gem_shmem, struct gna_gem_object, base);
+}
+
#endif /* __GNA_DEVICE_H__ */
diff --git a/drivers/gpu/drm/gna/gna_gem.h b/drivers/gpu/drm/gna/gna_gem.h
new file mode 100644
index 000000000000..f8fa6f35a788
--- /dev/null
+++ b/drivers/gpu/drm/gna/gna_gem.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2017-2022 Intel Corporation */
+
+#ifndef __GNA_GEM_H__
+#define __GNA_GEM_H__
+
+#include <drm/drm_gem_shmem_helper.h>
+
+struct gna_gem_object {
+ struct drm_gem_shmem_object base;
+
+ uint32_t handle;
+};
+
+#endif /* __GNA_GEM_H__ */
diff --git a/drivers/gpu/drm/gna/gna_ioctl.c b/drivers/gpu/drm/gna/gna_ioctl.c
index 21eb7aae4ad2..5051e9af6b06 100644
--- a/drivers/gpu/drm/gna/gna_ioctl.c
+++ b/drivers/gpu/drm/gna/gna_ioctl.c
@@ -2,11 +2,34 @@
// Copyright(c) 2017-2022 Intel Corporation
#include <drm/drm_device.h>
+#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_file.h>
#include <uapi/drm/gna_drm.h>
#include "gna_device.h"
+#include "gna_gem.h"
+
+int gna_gem_free_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ struct gna_device *gna_priv = to_gna_device(dev);
+ struct gna_gem_free *args = data;
+ struct gna_gem_object *gnagemo;
+ struct drm_gem_object *drmgemo;
+ int ret;
+
+ drmgemo = drm_gem_object_lookup(file, args->handle);
+ if (!drmgemo)
+ return -ENOENT;
+
+ gnagemo = to_gna_gem_obj(to_drm_gem_shmem_obj(drmgemo));
+
+ ret = drm_gem_handle_delete(file, args->handle);
+
+ drm_gem_object_put(drmgemo);
+ return ret;
+}
int gna_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
@@ -16,3 +39,50 @@ int gna_getparam_ioctl(struct drm_device *dev, void *data,
return gna_getparam(gna_priv, param);
}
+
+static struct drm_gem_shmem_object *
+drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
+ struct drm_device *dev, size_t size,
+ uint32_t *handle)
+{
+ struct drm_gem_shmem_object *shmem;
+ int ret;
+
+ shmem = drm_gem_shmem_create(dev, size);
+ if (IS_ERR(shmem))
+ return shmem;
+
+ /*
+ * Allocate an id of idr table where the obj is registered
+ * and handle has the id what user can see.
+ */
+ ret = drm_gem_handle_create(file_priv, &shmem->base, handle);
+ /* drop reference from allocate - handle holds it now. */
+ drm_gem_object_put(&shmem->base);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return shmem;
+}
+
+int gna_gem_new_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ struct drm_gem_shmem_object *drmgemshm;
+ struct gna_gem_object *gnagemo;
+ union gna_gem_new *args = data;
+
+ drmgemshm = drm_gem_shmem_create_with_handle(file, dev, args->in.size,
+ &args->out.handle);
+
+ if (IS_ERR(drmgemshm))
+ return PTR_ERR(drmgemshm);
+
+ args->out.size_granted = drmgemshm->base.size;
+ args->out.vma_fake_offset = drm_vma_node_offset_addr(&drmgemshm->base.vma_node);
+
+ gnagemo = to_gna_gem_obj(drmgemshm);
+ gnagemo->handle = args->out.handle;
+
+ return 0;
+}
diff --git a/include/uapi/drm/gna_drm.h b/include/uapi/drm/gna_drm.h
index 5a7cfd7e5df2..5391446bad7d 100644
--- a/include/uapi/drm/gna_drm.h
+++ b/include/uapi/drm/gna_drm.h
@@ -33,8 +33,31 @@ union gna_parameter {
} out;
};
+struct gna_mem_id {
+ __u32 handle;
+ __u32 pad;
+ __u64 vma_fake_offset;
+ __u64 size_granted;
+};
+
+union gna_gem_new {
+ struct {
+ __u64 size;
+ } in;
+
+ struct gna_mem_id out;
+};
+
+struct gna_gem_free {
+ __u32 handle;
+};
+
#define DRM_GNA_GET_PARAMETER 0x00
+#define DRM_GNA_GEM_NEW 0x01
+#define DRM_GNA_GEM_FREE 0x02
#define DRM_IOCTL_GNA_GET_PARAMETER DRM_IOWR(DRM_COMMAND_BASE + DRM_GNA_GET_PARAMETER, union gna_parameter)
+#define DRM_IOCTL_GNA_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_GNA_GEM_NEW, union gna_gem_new)
+#define DRM_IOCTL_GNA_GEM_FREE DRM_IOWR(DRM_COMMAND_BASE + DRM_GNA_GEM_FREE, struct gna_gem_free)
#endif /* _GNA_DRM_H_ */
--
2.25.1
