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Message-Id: <20181219115127.31359-12-kraxel@redhat.com>
Date: Wed, 19 Dec 2018 12:51:24 +0100
From: Gerd Hoffmann <kraxel@...hat.com>
To: dri-devel@...ts.freedesktop.org, David Airlie <airlied@...hat.com>
Cc: Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>,
virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR
BOCHS VIRTUAL GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 11/14] drm/bochs: add basic prime support
Generic framebuffer emulation needs this.
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
drivers/gpu/drm/bochs/bochs.h | 11 +++++++
drivers/gpu/drm/bochs/bochs_drv.c | 15 +++++++++-
drivers/gpu/drm/bochs/bochs_mm.c | 63 +++++++++++++++++++++++++++++++++++++++
3 files changed, 88 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
index d0d474e06f..4236d5d811 100644
--- a/drivers/gpu/drm/bochs/bochs.h
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -145,6 +145,17 @@ int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag);
int bochs_bo_unpin(struct bochs_bo *bo);
+int bochs_gem_prime_pin(struct drm_gem_object *obj);
+void bochs_gem_prime_unpin(struct drm_gem_object *obj);
+struct sg_table *bochs_gem_prime_get_sg_table(struct drm_gem_object *obj);
+struct drm_gem_object *bochs_gem_prime_import_sg_table(
+ struct drm_device *dev, struct dma_buf_attachment *attach,
+ struct sg_table *sgt);
+void *bochs_gem_prime_vmap(struct drm_gem_object *obj);
+void bochs_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
+int bochs_gem_prime_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma);
+
/* bochs_kms.c */
int bochs_kms_init(struct bochs_device *bochs);
void bochs_kms_fini(struct bochs_device *bochs);
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 278f9d2e7f..a9c7140e3b 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -81,7 +81,8 @@ static const struct file_operations bochs_fops = {
};
static struct drm_driver bochs_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
+ DRIVER_PRIME,
.fops = &bochs_fops,
.name = "bochs-drm",
.desc = "bochs dispi vga interface (qemu stdvga)",
@@ -91,6 +92,18 @@ static struct drm_driver bochs_driver = {
.gem_free_object_unlocked = bochs_gem_free_object,
.dumb_create = bochs_dumb_create,
.dumb_map_offset = bochs_dumb_mmap_offset,
+
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_pin = bochs_gem_prime_pin,
+ .gem_prime_unpin = bochs_gem_prime_unpin,
+ .gem_prime_get_sg_table = bochs_gem_prime_get_sg_table,
+ .gem_prime_import_sg_table = bochs_gem_prime_import_sg_table,
+ .gem_prime_vmap = bochs_gem_prime_vmap,
+ .gem_prime_vunmap = bochs_gem_prime_vunmap,
+ .gem_prime_mmap = bochs_gem_prime_mmap,
};
/* ---------------------------------------------------------------------- */
diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
index 5a0e092847..cfe061c25f 100644
--- a/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -387,3 +387,66 @@ int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
drm_gem_object_put_unlocked(obj);
return 0;
}
+
+/* ---------------------------------------------------------------------- */
+
+int bochs_gem_prime_pin(struct drm_gem_object *obj)
+{
+ struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+ return bochs_bo_pin(bo, TTM_PL_FLAG_VRAM);
+}
+
+void bochs_gem_prime_unpin(struct drm_gem_object *obj)
+{
+ struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+ bochs_bo_unpin(bo);
+}
+
+struct sg_table *bochs_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+ WARN_ONCE(1, "not implemented");
+ return ERR_PTR(-ENODEV);
+}
+
+struct drm_gem_object *bochs_gem_prime_import_sg_table(
+ struct drm_device *dev, struct dma_buf_attachment *attach,
+ struct sg_table *table)
+{
+ WARN_ONCE(1, "not implemented");
+ return ERR_PTR(-ENODEV);
+}
+
+void *bochs_gem_prime_vmap(struct drm_gem_object *obj)
+{
+ struct bochs_bo *bo = gem_to_bochs_bo(obj);
+ bool is_iomem;
+ int ret;
+
+ ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM);
+ if (ret)
+ return NULL;
+ ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+ if (ret) {
+ bochs_bo_unpin(bo);
+ return NULL;
+ }
+ return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+}
+
+void bochs_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+ struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+ ttm_bo_kunmap(&bo->kmap);
+ bochs_bo_unpin(bo);
+}
+
+int bochs_gem_prime_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma)
+{
+ struct bochs_bo *bo = gem_to_bochs_bo(obj);
+
+ return ttm_fbdev_mmap(vma, &bo->bo);
+}
--
2.9.3
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