Message ID | 20220818094517.214421-1-oushixiong@kylinos.cn (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | [v2] drm/ast: add dmabuf/prime buffer sharing support | expand |
Am 18.08.22 um 11:45 schrieb oushixiong: > This patch adds ast specific codes for DRM prime feature, this is to > allow for offloading of rending in one direction and outputs in other. > > v1->v2: > - Fix the comment. > > Signed-off-by: oushixiong <oushixiong@kylinos.cn> > --- > drivers/gpu/drm/ast/ast_drv.c | 22 ++++++ > drivers/gpu/drm/ast/ast_mode.c | 125 ++++++++++++++++++++++++++++++++- > 2 files changed, 146 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c > index 7465c4f0156a..6c1f75174368 100644 > --- a/drivers/gpu/drm/ast/ast_drv.c > +++ b/drivers/gpu/drm/ast/ast_drv.c > @@ -28,6 +28,7 @@ > > #include <linux/module.h> > #include <linux/pci.h> > +#include <linux/dma-buf.h> > > #include <drm/drm_aperture.h> > #include <drm/drm_atomic_helper.h> > @@ -50,6 +51,23 @@ module_param_named(modeset, ast_modeset, int, 0400); > > DEFINE_DRM_GEM_FOPS(ast_fops); > > +static struct drm_gem_object *ast_gem_prime_import_sg_table(struct drm_device *dev, > + struct dma_buf_attachment *attach, > + struct sg_table *sg) > +{ > + struct drm_gem_vram_object *gbo; > + struct dma_resv *resv = attach->dmabuf->resv; > + > + ww_mutex_lock(&resv->lock, NULL); > + gbo = drm_gem_vram_create(dev, attach->dmabuf->size, 0); > + ww_mutex_unlock(&resv->lock); > + > + if (IS_ERR(gbo)) > + return NULL; Well where do you use the sg_table here? Christian. > + > + return &gbo->bo.base; > +} > + > static const struct drm_driver ast_driver = { > .driver_features = DRIVER_ATOMIC | > DRIVER_GEM | > @@ -63,6 +81,10 @@ static const struct drm_driver ast_driver = { > .minor = DRIVER_MINOR, > .patchlevel = DRIVER_PATCHLEVEL, > > + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, > + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, > + .gem_prime_import_sg_table = ast_gem_prime_import_sg_table, > + > DRM_GEM_VRAM_DRIVER > }; > > diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c > index 45b56b39ad47..ebe732705e34 100644 > --- a/drivers/gpu/drm/ast/ast_mode.c > +++ b/drivers/gpu/drm/ast/ast_mode.c > @@ -48,6 +48,8 @@ > #include "ast_drv.h" > #include "ast_tables.h" > > +MODULE_IMPORT_NS(DMA_BUF); > + > static inline void ast_load_palette_index(struct ast_private *ast, > u8 index, u8 red, u8 green, > u8 blue) > @@ -1535,8 +1537,129 @@ static const struct drm_mode_config_helper_funcs ast_mode_config_helper_funcs = > .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, > }; > > +static int ast_handle_damage(struct drm_framebuffer *fb, int x, int y, > + int width, int height) > +{ > + struct drm_gem_vram_object *dst_bo = NULL; > + void *dst = NULL; > + int ret = 0, i; > + unsigned long offset = 0; > + bool unmap = false; > + unsigned int bytesPerPixel; > + struct iosys_map map; > + struct iosys_map dmabuf_map; > + > + bytesPerPixel = fb->format->cpp[0]; > + > + if (!fb->obj[0]->import_attach) > + return -EINVAL; > + > + if (!fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr) { > + ret = dma_buf_vmap(fb->obj[0]->import_attach->dmabuf, &dmabuf_map); > + if (ret) > + return 0; > + } else > + dmabuf_map.vaddr = fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr; > + > + dst_bo = drm_gem_vram_of_gem(fb->obj[0]); > + > + ret = drm_gem_vram_pin(dst_bo, 0); > + if (ret) { > + DRM_ERROR("ast_bo_pin failed\n"); > + goto error; > + } > + > + if (!dst_bo->map.vaddr) { > + ret = drm_gem_vram_vmap(dst_bo, &map); > + if (ret) { > + DRM_ERROR("failed to vmap fbcon\n"); > + drm_gem_vram_unpin(dst_bo); > + goto error; > + } > + unmap = true; > + } > + dst = dst_bo->map.vaddr; > + > + for (i = y; i < y + height; i++) { > + offset = i * fb->pitches[0] + (x * bytesPerPixel); > + memcpy_toio(dst + offset, dmabuf_map.vaddr + offset, > + width * bytesPerPixel); > + } > + > + if (unmap) > + drm_gem_vram_vunmap(dst_bo, &map); > + > + drm_gem_vram_unpin(dst_bo); > +error: > + return 0; > +} > + > + > +static int ast_user_framebuffer_dirty(struct drm_framebuffer *fb, > + struct drm_file *file, > + unsigned int flags, > + unsigned int color, > + struct drm_clip_rect *clips, > + unsigned int num_clips) > +{ > + int i, ret = 0; > + > + drm_modeset_lock_all(fb->dev); > + if (fb->obj[0]->import_attach) { > + ret = dma_buf_begin_cpu_access(fb->obj[0]->import_attach->dmabuf, > + DMA_FROM_DEVICE); > + if (ret) > + goto unlock; > + } > + > + for (i = 0; i < num_clips; i++) { > + ret = ast_handle_damage(fb, clips[i].x1, clips[i].y1, > + clips[i].x2 - clips[i].x1, clips[i].y2 - clips[i].y1); > + if (ret) > + break; > + } > + > + if (fb->obj[0]->import_attach) { > + dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf, > + DMA_FROM_DEVICE); > + } > + > +unlock: > + drm_modeset_unlock_all(fb->dev); > + > + return ret; > +} > + > +static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb) > +{ > + struct iosys_map dmabuf_map; > + > + if (fb->obj[0]->import_attach) { > + dmabuf_map.vaddr = fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr; > + if (dmabuf_map.vaddr) > + dma_buf_vunmap(fb->obj[0]->import_attach->dmabuf, > + &dmabuf_map); > + } > + > + drm_gem_fb_destroy(fb); > +} > + > +static const struct drm_framebuffer_funcs ast_gem_fb_funcs_dirtyfb = { > + .destroy = ast_user_framebuffer_destroy, > + .create_handle = drm_gem_fb_create_handle, > + .dirty = ast_user_framebuffer_dirty, > +}; > + > +static struct drm_framebuffer * > +ast_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, > + const struct drm_mode_fb_cmd2 *mode_cmd) > +{ > + return drm_gem_fb_create_with_funcs(dev, file, mode_cmd, > + &ast_gem_fb_funcs_dirtyfb); > +} > + > static const struct drm_mode_config_funcs ast_mode_config_funcs = { > - .fb_create = drm_gem_fb_create, > + .fb_create = ast_gem_fb_create_with_dirty, > .mode_valid = drm_vram_helper_mode_valid, > .atomic_check = drm_atomic_helper_check, > .atomic_commit = drm_atomic_helper_commit,
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c index 7465c4f0156a..6c1f75174368 100644 --- a/drivers/gpu/drm/ast/ast_drv.c +++ b/drivers/gpu/drm/ast/ast_drv.c @@ -28,6 +28,7 @@ #include <linux/module.h> #include <linux/pci.h> +#include <linux/dma-buf.h> #include <drm/drm_aperture.h> #include <drm/drm_atomic_helper.h> @@ -50,6 +51,23 @@ module_param_named(modeset, ast_modeset, int, 0400); DEFINE_DRM_GEM_FOPS(ast_fops); +static struct drm_gem_object *ast_gem_prime_import_sg_table(struct drm_device *dev, + struct dma_buf_attachment *attach, + struct sg_table *sg) +{ + struct drm_gem_vram_object *gbo; + struct dma_resv *resv = attach->dmabuf->resv; + + ww_mutex_lock(&resv->lock, NULL); + gbo = drm_gem_vram_create(dev, attach->dmabuf->size, 0); + ww_mutex_unlock(&resv->lock); + + if (IS_ERR(gbo)) + return NULL; + + return &gbo->bo.base; +} + static const struct drm_driver ast_driver = { .driver_features = DRIVER_ATOMIC | DRIVER_GEM | @@ -63,6 +81,10 @@ static const struct drm_driver ast_driver = { .minor = DRIVER_MINOR, .patchlevel = DRIVER_PATCHLEVEL, + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_import_sg_table = ast_gem_prime_import_sg_table, + DRM_GEM_VRAM_DRIVER }; diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c index 45b56b39ad47..ebe732705e34 100644 --- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -48,6 +48,8 @@ #include "ast_drv.h" #include "ast_tables.h" +MODULE_IMPORT_NS(DMA_BUF); + static inline void ast_load_palette_index(struct ast_private *ast, u8 index, u8 red, u8 green, u8 blue) @@ -1535,8 +1537,129 @@ static const struct drm_mode_config_helper_funcs ast_mode_config_helper_funcs = .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, }; +static int ast_handle_damage(struct drm_framebuffer *fb, int x, int y, + int width, int height) +{ + struct drm_gem_vram_object *dst_bo = NULL; + void *dst = NULL; + int ret = 0, i; + unsigned long offset = 0; + bool unmap = false; + unsigned int bytesPerPixel; + struct iosys_map map; + struct iosys_map dmabuf_map; + + bytesPerPixel = fb->format->cpp[0]; + + if (!fb->obj[0]->import_attach) + return -EINVAL; + + if (!fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr) { + ret = dma_buf_vmap(fb->obj[0]->import_attach->dmabuf, &dmabuf_map); + if (ret) + return 0; + } else + dmabuf_map.vaddr = fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr; + + dst_bo = drm_gem_vram_of_gem(fb->obj[0]); + + ret = drm_gem_vram_pin(dst_bo, 0); + if (ret) { + DRM_ERROR("ast_bo_pin failed\n"); + goto error; + } + + if (!dst_bo->map.vaddr) { + ret = drm_gem_vram_vmap(dst_bo, &map); + if (ret) { + DRM_ERROR("failed to vmap fbcon\n"); + drm_gem_vram_unpin(dst_bo); + goto error; + } + unmap = true; + } + dst = dst_bo->map.vaddr; + + for (i = y; i < y + height; i++) { + offset = i * fb->pitches[0] + (x * bytesPerPixel); + memcpy_toio(dst + offset, dmabuf_map.vaddr + offset, + width * bytesPerPixel); + } + + if (unmap) + drm_gem_vram_vunmap(dst_bo, &map); + + drm_gem_vram_unpin(dst_bo); +error: + return 0; +} + + +static int ast_user_framebuffer_dirty(struct drm_framebuffer *fb, + struct drm_file *file, + unsigned int flags, + unsigned int color, + struct drm_clip_rect *clips, + unsigned int num_clips) +{ + int i, ret = 0; + + drm_modeset_lock_all(fb->dev); + if (fb->obj[0]->import_attach) { + ret = dma_buf_begin_cpu_access(fb->obj[0]->import_attach->dmabuf, + DMA_FROM_DEVICE); + if (ret) + goto unlock; + } + + for (i = 0; i < num_clips; i++) { + ret = ast_handle_damage(fb, clips[i].x1, clips[i].y1, + clips[i].x2 - clips[i].x1, clips[i].y2 - clips[i].y1); + if (ret) + break; + } + + if (fb->obj[0]->import_attach) { + dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf, + DMA_FROM_DEVICE); + } + +unlock: + drm_modeset_unlock_all(fb->dev); + + return ret; +} + +static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb) +{ + struct iosys_map dmabuf_map; + + if (fb->obj[0]->import_attach) { + dmabuf_map.vaddr = fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr; + if (dmabuf_map.vaddr) + dma_buf_vunmap(fb->obj[0]->import_attach->dmabuf, + &dmabuf_map); + } + + drm_gem_fb_destroy(fb); +} + +static const struct drm_framebuffer_funcs ast_gem_fb_funcs_dirtyfb = { + .destroy = ast_user_framebuffer_destroy, + .create_handle = drm_gem_fb_create_handle, + .dirty = ast_user_framebuffer_dirty, +}; + +static struct drm_framebuffer * +ast_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + return drm_gem_fb_create_with_funcs(dev, file, mode_cmd, + &ast_gem_fb_funcs_dirtyfb); +} + static const struct drm_mode_config_funcs ast_mode_config_funcs = { - .fb_create = drm_gem_fb_create, + .fb_create = ast_gem_fb_create_with_dirty, .mode_valid = drm_vram_helper_mode_valid, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit,
This patch adds ast specific codes for DRM prime feature, this is to allow for offloading of rending in one direction and outputs in other. v1->v2: - Fix the comment. Signed-off-by: oushixiong <oushixiong@kylinos.cn> --- drivers/gpu/drm/ast/ast_drv.c | 22 ++++++ drivers/gpu/drm/ast/ast_mode.c | 125 ++++++++++++++++++++++++++++++++- 2 files changed, 146 insertions(+), 1 deletion(-)