From: Thomas Zimmermann <tzimmermann@suse.de>
To: daniel@ffwll.ch, airlied@linux.ie, mripard@kernel.org,
maarten.lankhorst@linux.intel.com, bskeggs@redhat.com,
kraxel@redhat.com
Cc: nouveau@lists.freedesktop.org,
Thomas Zimmermann <tzimmermann@suse.de>,
spice-devel@lists.freedesktop.org,
dri-devel@lists.freedesktop.org,
virtualization@lists.linux-foundation.org
Subject: [PATCH 1/4] drm/gem-ttm-helper: Provide helper for struct drm_driver.dumb_map_offset
Date: Tue, 6 Apr 2021 10:29:39 +0200 [thread overview]
Message-ID: <20210406082942.24049-2-tzimmermann@suse.de> (raw)
In-Reply-To: <20210406082942.24049-1-tzimmermann@suse.de>
Provides an implementation of struct drm_driver.dumb_map_offset that
can be used by TTM-based GEM drivers.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/drm_gem_ttm_helper.c | 33 ++++++++++++++++++++++++++++
include/drm/drm_gem_ttm_helper.h | 5 ++++-
2 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
index de28720757af..b14bed8be771 100644
--- a/drivers/gpu/drm/drm_gem_ttm_helper.c
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -114,5 +114,38 @@ int drm_gem_ttm_mmap(struct drm_gem_object *gem,
}
EXPORT_SYMBOL(drm_gem_ttm_mmap);
+/**
+ * drm_gem_ttm_dumb_map_offset() - Implements struct &drm_driver.dumb_map_offset
+ * @file: DRM file pointer.
+ * @dev: DRM device.
+ * @handle: GEM handle
+ * @offset: Returns the mapping's memory offset on success
+ *
+ * Provides an implementation of struct &drm_driver.dumb_map_offset for
+ * TTM-based GEM drivers. TTM allocates the offset internally and
+ * drm_gem_ttm_dumb_map_offset() returns it for dumb-buffer implementations.
+ *
+ * See struct &drm_driver.dumb_map_offset.
+ *
+ * Returns:
+ * 0 on success, or a negative errno code otherwise.
+ */
+int drm_gem_ttm_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
+ uint32_t handle, uint64_t *offset)
+{
+ struct drm_gem_object *gem;
+
+ gem = drm_gem_object_lookup(file, handle);
+ if (!gem)
+ return -ENOENT;
+
+ *offset = drm_vma_node_offset_addr(&gem->vma_node);
+
+ drm_gem_object_put(gem);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_gem_ttm_dumb_map_offset);
+
MODULE_DESCRIPTION("DRM gem ttm helpers");
MODULE_LICENSE("GPL");
diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
index 7c6d874910b8..c1aa02bd4c89 100644
--- a/include/drm/drm_gem_ttm_helper.h
+++ b/include/drm/drm_gem_ttm_helper.h
@@ -5,8 +5,8 @@
#include <linux/kernel.h>
-#include <drm/drm_gem.h>
#include <drm/drm_device.h>
+#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
@@ -24,4 +24,7 @@ void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
int drm_gem_ttm_mmap(struct drm_gem_object *gem,
struct vm_area_struct *vma);
+int drm_gem_ttm_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
+ uint32_t handle, uint64_t *offset);
+
#endif
--
2.30.2
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next prev parent reply other threads:[~2021-04-06 8:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-06 8:29 [PATCH 0/4] drm: Generic dumb_map_offset for TTM-based drivers Thomas Zimmermann
2021-04-06 8:29 ` Thomas Zimmermann [this message]
2021-04-06 8:29 ` [PATCH 2/4] drm/vram-helper: Use drm_gem_ttm_dumb_map_offset() Thomas Zimmermann
2021-04-06 8:29 ` [PATCH 3/4] drm/nouveau: " Thomas Zimmermann
2021-04-06 8:29 ` [PATCH 4/4] drm/qxl: " Thomas Zimmermann
2021-04-08 11:16 ` [PATCH 0/4] drm: Generic dumb_map_offset for TTM-based drivers Daniel Vetter
2021-04-08 11:34 ` Thomas Zimmermann
2021-04-08 11:39 ` Daniel Vetter
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