[PATCH 2/9] drm/exynox: Implement mmap as GEM object function
Thomas Zimmermann
tzimmermann at suse.de
Wed Jun 9 04:20:05 PDT 2021
Moving the driver-specific mmap code into a GEM object function allows
for using DRM helpers for various mmap callbacks.
The respective exynos functions are being removed. The file_operations
structure exynos_drm_driver_fops is now being created by the helper macro
DEFINE_DRM_GEM_FOPS().
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
drivers/gpu/drm/exynos/exynos_drm_drv.c | 13 ++-----
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 20 ++---------
drivers/gpu/drm/exynos/exynos_drm_gem.c | 43 +++++------------------
drivers/gpu/drm/exynos/exynos_drm_gem.h | 5 ---
4 files changed, 13 insertions(+), 68 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index e60257f1f24b..1d46751cad02 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -102,16 +102,7 @@ static const struct drm_ioctl_desc exynos_ioctls[] = {
DRM_RENDER_ALLOW),
};
-static const struct file_operations exynos_drm_driver_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .mmap = exynos_drm_gem_mmap,
- .poll = drm_poll,
- .read = drm_read,
- .unlocked_ioctl = drm_ioctl,
- .compat_ioctl = drm_compat_ioctl,
- .release = drm_release,
-};
+DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
static const struct drm_driver exynos_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM
@@ -124,7 +115,7 @@ static const struct drm_driver exynos_drm_driver = {
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = exynos_drm_gem_prime_import,
.gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
- .gem_prime_mmap = exynos_drm_gem_prime_mmap,
+ .gem_prime_mmap = drm_gem_prime_mmap,
.ioctls = exynos_ioctls,
.num_ioctls = ARRAY_SIZE(exynos_ioctls),
.fops = &exynos_drm_driver_fops,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index 5147f5929be7..02c97b9ca926 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -15,6 +15,7 @@
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
+#include <drm/drm_prime.h>
#include <drm/drm_probe_helper.h>
#include <drm/exynos_drm.h>
@@ -39,25 +40,8 @@ static int exynos_drm_fb_mmap(struct fb_info *info,
struct drm_fb_helper *helper = info->par;
struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
- unsigned long vm_size;
- int ret;
-
- vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
-
- vm_size = vma->vm_end - vma->vm_start;
-
- if (vm_size > exynos_gem->size)
- return -EINVAL;
- ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie,
- exynos_gem->dma_addr, exynos_gem->size,
- exynos_gem->dma_attrs);
- if (ret < 0) {
- DRM_DEV_ERROR(to_dma_dev(helper->dev), "failed to mmap.\n");
- return ret;
- }
-
- return 0;
+ return drm_gem_prime_mmap(&exynos_gem->base, vma);
}
static const struct fb_ops exynos_drm_fb_ops = {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 4396224227d1..c4b63902ee7a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -17,6 +17,8 @@
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
+static int exynos_drm_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
+
static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem, bool kvmap)
{
struct drm_device *dev = exynos_gem->base.dev;
@@ -135,6 +137,7 @@ static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
static const struct drm_gem_object_funcs exynos_drm_gem_object_funcs = {
.free = exynos_drm_gem_free_object,
.get_sg_table = exynos_drm_gem_prime_get_sg_table,
+ .mmap = exynos_drm_gem_mmap,
.vm_ops = &exynos_drm_gem_vm_ops,
};
@@ -354,12 +357,16 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
return 0;
}
-static int exynos_drm_gem_mmap_obj(struct drm_gem_object *obj,
- struct vm_area_struct *vma)
+static int exynos_drm_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{
struct exynos_drm_gem *exynos_gem = to_exynos_gem(obj);
int ret;
+ if (obj->import_attach)
+ return dma_buf_mmap(obj->dma_buf, vma, 0);
+
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+
DRM_DEV_DEBUG_KMS(to_dma_dev(obj->dev), "flags = 0x%x\n",
exynos_gem->flags);
@@ -385,26 +392,6 @@ static int exynos_drm_gem_mmap_obj(struct drm_gem_object *obj,
return ret;
}
-int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_gem_object *obj;
- int ret;
-
- /* set vm_area_struct. */
- ret = drm_gem_mmap(filp, vma);
- if (ret < 0) {
- DRM_ERROR("failed to mmap.\n");
- return ret;
- }
-
- obj = vma->vm_private_data;
-
- if (obj->import_attach)
- return dma_buf_mmap(obj->dma_buf, vma, 0);
-
- return exynos_drm_gem_mmap_obj(obj, vma);
-}
-
/* low-level interface prime helpers */
struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
@@ -466,15 +453,3 @@ exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
exynos_gem->sgt = sgt;
return &exynos_gem->base;
}
-
-int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj,
- struct vm_area_struct *vma)
-{
- int ret;
-
- ret = drm_gem_mmap_obj(obj, obj->size, vma);
- if (ret < 0)
- return ret;
-
- return exynos_drm_gem_mmap_obj(obj, vma);
-}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index a23272fb96fb..79d7e1a87419 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -96,9 +96,6 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
-/* set vm_flags and we can change the vm attribute to other one at here. */
-int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-
/* low-level interface prime helpers */
struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf);
@@ -107,7 +104,5 @@ struct drm_gem_object *
exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
-int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj,
- struct vm_area_struct *vma);
#endif
--
2.31.1
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