These basic helper functions for GEM VRAM allow for pinning and mapping
GEM VRAM objects via the PRIME interfaces. It's not a full implementation,
but complete enough for generic fbcon.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/drm_gem_vram_helper.c | 98 +++++++++++++++++++++++++++
include/drm/drm_gem_vram_helper.h | 20 ++++++
2 files changed, 118 insertions(+)
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index aba073279ca2..15c6193e4985 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -2,6 +2,7 @@
#include <drm/drm_gem_vram_helper.h>
#include <drm/drm_mode.h>
+#include <drm/drm_prime.h>
#include <drm/ttm/ttm_page_alloc.h>
/**
@@ -571,3 +572,100 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
return 0;
}
EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
+
+/*
+ * PRIME helpers for struct drm_driver
+ */
+
+/**
+ * drm_gem_vram_driver_gem_prime_pin() - \
+ Implements &struct drm_driver.gem_prime_pin
+ * @gem: The GEM object to pin
+ *
+ * Returns:
+ * 0 on success, or
+ * a negative errno code otherwise.
+ */
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *gem)
+{
+ struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+
+ return drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_pin);
+
+/**
+ * drm_gem_vram_driver_gem_prime_unpin() - \
+ Implements &struct drm_driver.gem_prime_unpin
+ * @gem: The GEM object to unpin
+ */
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *gem)
+{
+ struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+
+ drm_gem_vram_unpin(gbo);
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_unpin);
+
+/**
+ * drm_gem_vram_driver_gem_prime_vmap() - \
+ Implements &struct drm_driver.gem_prime_vmap
+ * @gem: The GEM object to map
+ *
+ * Returns:
+ * The buffers virtual address on success, or
+ * NULL otherwise.
+ */
+void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *gem)
+{
+ struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+ int ret;
+ void *base;
+
+ ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
+ if (ret)
+ return NULL;
+ base = drm_gem_vram_kmap(gbo, true, NULL);
+ if (IS_ERR(base)) {
+ drm_gem_vram_unpin(gbo);
+ return NULL;
+ }
+ return base;
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_vmap);
+
+/**
+ * drm_gem_vram_driver_gem_prime_vunmap() - \
+ Implements &struct drm_driver.gem_prime_vunmap
+ * @gem: The GEM object to unmap
+ * @vaddr: The mapping's base address
+ */
+void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *gem,
+ void *vaddr)
+{
+ struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+
+ drm_gem_vram_kunmap(gbo);
+ drm_gem_vram_unpin(gbo);
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_vunmap);
+
+/**
+ * drm_gem_vram_driver_gem_prime_mmap() - \
+ Implements &struct drm_driver.gem_prime_mmap
+ * @gem: The GEM object to map
+ * @vma: The VMA describing the mapping
+ *
+ * Returns:
+ * 0 on success, or
+ * a negative errno code otherwise.
+ */
+int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *gem,
+ struct vm_area_struct *vma)
+{
+ struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+
+ gbo->gem.vma_node.vm_node.start = gbo->bo.vma_node.vm_node.start;
+ return drm_gem_prime_mmap(gem, vma);
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_prime_mmap);
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 8e54f721c9f8..9a8bd98b623f 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -116,5 +116,25 @@ void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem);
int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
struct drm_device *dev,
uint32_t handle, uint64_t *offset);
+/*
+ * PRIME helpers for struct drm_driver
+ */
+
+int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
+void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
+void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
+void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
+ void *vaddr);
+int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma);
+
+#define DRM_GEM_VRAM_DRIVER_PRIME \
+ .gem_prime_export = drm_gem_prime_export, \
+ .gem_prime_import = drm_gem_prime_import, \
+ .gem_prime_pin = drm_gem_vram_driver_gem_prime_pin, \
+ .gem_prime_unpin = drm_gem_vram_driver_gem_prime_unpin, \
+ .gem_prime_vmap = drm_gem_vram_driver_gem_prime_vmap, \
+ .gem_prime_vunmap = drm_gem_vram_driver_gem_prime_vunmap, \
+ .gem_prime_mmap = drm_gem_vram_driver_gem_prime_mmap
#endif
--
2.21.0
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