> ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'attach' not described in 'drm_gem_unmap_dma_buf' > ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'sgt' not described in 'drm_gem_unmap_dma_buf' > ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'dir' not described in 'drm_gem_unmap_dma_buf' ... Actually I tested. Those parameters are left out on purpose since they are empty functions so far. Regards, Samuel Li > -----Original Message----- > From: Daniel Vetter [mailto:daniel.vetter at ffwll.ch] On Behalf Of Daniel > Vetter > Sent: Tuesday, February 20, 2018 10:13 AM > To: Li, Samuel <Samuel.Li at amd.com> > Cc: Daniel Vetter <daniel at ffwll.ch>; Koenig, Christian > <Christian.Koenig at amd.com>; amd-gfx at lists.freedesktop.org; dri- > devel at lists.freedesktop.org > Subject: Re: [PATCH v2 1/1] drm: add kernel doc for exported gem > dmabuf_ops > > On Tue, Jan 30, 2018 at 04:01:23PM +0000, Li, Samuel wrote: > > > > Alex helped push this into drm-tip, > > https://cgit.freedesktop.org/drm/drm- > tip/commit/drivers/gpu/drm?id=f7a > > 71b0cf9e36c1b0edbfe89ce028a01164b864d > > > > Thanks, > > Samuel Li > > > > > > > -----Original Message----- > > > From: Daniel Vetter [mailto:daniel.vetter at ffwll.ch] On Behalf Of > > > Daniel Vetter > > > Sent: Tuesday, January 30, 2018 4:33 AM > > > To: Koenig, Christian <Christian.Koenig at amd.com> > > > Cc: Li, Samuel <Samuel.Li at amd.com>; amd-gfx at lists.freedesktop.org; > > > dri- devel at lists.freedesktop.org > > > Subject: Re: [PATCH v2 1/1] drm: add kernel doc for exported gem > > > dmabuf_ops > > > > > > On Fri, Jan 19, 2018 at 09:51:20AM +0100, Christian König wrote: > > > > Am 18.01.2018 um 22:44 schrieb Samuel Li: > > > > > Signed-off-by: Samuel Li <Samuel.Li at amd.com> > > > > > Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> > > > > > > Thanks for updating the docs. > > > > > > > > Reviewed-by: Christian König <christian.koenig at amd.com> > > > > > > I'm assuming you'll als push this one. > > I just noticed that fairly obviously this wasn't tested when writing: > > ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'attach' not described in 'drm_gem_unmap_dma_buf' > ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'sgt' not described in 'drm_gem_unmap_dma_buf' > ./drivers/gpu/drm/drm_prime.c:342: warning: Function parameter or > member 'dir' not described in 'drm_gem_unmap_dma_buf' > ./drivers/gpu/drm/drm_prime.c:438: warning: Function parameter or > member 'dma_buf' not described in 'drm_gem_dmabuf_kmap_atomic' > ./drivers/gpu/drm/drm_prime.c:438: warning: Function parameter or > member 'page_num' not described in 'drm_gem_dmabuf_kmap_atomic' > ./drivers/gpu/drm/drm_prime.c:450: warning: Function parameter or > member 'dma_buf' not described in 'drm_gem_dmabuf_kunmap_atomic' > ./drivers/gpu/drm/drm_prime.c:450: warning: Function parameter or > member 'page_num' not described in 'drm_gem_dmabuf_kunmap_atomic' > ./drivers/gpu/drm/drm_prime.c:450: warning: Function parameter or > member 'addr' not described in 'drm_gem_dmabuf_kunmap_atomic' > ./drivers/gpu/drm/drm_prime.c:461: warning: Function parameter or > member 'dma_buf' not described in 'drm_gem_dmabuf_kmap' > ./drivers/gpu/drm/drm_prime.c:461: warning: Function parameter or > member 'page_num' not described in 'drm_gem_dmabuf_kmap' > ./drivers/gpu/drm/drm_prime.c:473: warning: Function parameter or > member 'dma_buf' not described in 'drm_gem_dmabuf_kunmap' > ./drivers/gpu/drm/drm_prime.c:473: warning: Function parameter or > member 'page_num' not described in 'drm_gem_dmabuf_kunmap' > ./drivers/gpu/drm/drm_prime.c:473: warning: Function parameter or > member 'addr' not described in 'drm_gem_dmabuf_kunmap' > > Samuel, can you pls build docs using > > $ make htmldocs > > and fix up the fallout and submit a patch? > > Thanks, Daniel > > > > -Daniel > > > > > > > > > > > > --- > > > > > drivers/gpu/drm/drm_prime.c | 88 > > > +++++++++++++++++++++++++++++++++++++++++++++ > > > > > 1 file changed, 88 insertions(+) > > > > > > > > > > diff --git a/drivers/gpu/drm/drm_prime.c > > > > > b/drivers/gpu/drm/drm_prime.c index ca09ce7..e82a976 100644 > > > > > --- a/drivers/gpu/drm/drm_prime.c > > > > > +++ b/drivers/gpu/drm/drm_prime.c > > > > > @@ -73,6 +73,9 @@ > > > > > * Drivers should detect this situation and return back the gem object > > > > > * from the dma-buf private. Prime will do this automatically > > > > > for drivers > > > that > > > > > * use the drm_gem_prime_{import,export} helpers. > > > > > + * > > > > > + * GEM struct &dma_buf_ops symbols are now exported. They can > > > > > + be resued by > > > > > + * drivers which implement GEM interface. > > > > > */ > > > > > struct drm_prime_member { > > > > > @@ -180,6 +183,18 @@ static int > > > > > drm_prime_lookup_buf_handle(struct > > > drm_prime_file_private *prime_fpri > > > > > return -ENOENT; > > > > > } > > > > > +/** > > > > > + * drm_gem_map_attach - dma_buf attach implementation for GEM > > > > > + * @dma_buf: buffer to attach device to > > > > > + * @target_dev: not used > > > > > + * @attach: buffer attachment data > > > > > + * > > > > > + * Allocates &drm_prime_attachment and calls > > > > > +&drm_driver.gem_prime_pin for > > > > > + * device specific attachment. This can be used as the > > > > > +&dma_buf_ops.attach > > > > > + * callback. > > > > > + * > > > > > + * Returns 0 on success, negative error code on failure. > > > > > + */ > > > > > int drm_gem_map_attach(struct dma_buf *dma_buf, struct device > > > *target_dev, > > > > > struct dma_buf_attachment *attach) > > > > > { > > > > > @@ -201,6 +216,14 @@ int drm_gem_map_attach(struct dma_buf > > > *dma_buf, struct device *target_dev, > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_map_attach); > > > > > +/** > > > > > + * drm_gem_map_detach - dma_buf detach implementation for > GEM > > > > > + * @dma_buf: buffer to detach from > > > > > + * @attach: attachment to be detached > > > > > + * > > > > > + * Cleans up &dma_buf_attachment. This can be used as the > > > > > +&dma_buf_ops.detach > > > > > + * callback. > > > > > + */ > > > > > void drm_gem_map_detach(struct dma_buf *dma_buf, > > > > > struct dma_buf_attachment *attach) > > > > > { > > > > > @@ -255,6 +278,18 @@ void > > > drm_prime_remove_buf_handle_locked(struct drm_prime_file_private > > > *prime_fpr > > > > > } > > > > > } > > > > > +/** > > > > > + * drm_gem_map_dma_buf - map_dma_buf implementation for > GEM > > > > > + * @attach: attachment whose scatterlist is to be returned > > > > > + * @dir: direction of DMA transfer > > > > > + * > > > > > + * Calls &drm_driver.gem_prime_get_sg_table and then maps the > > > > > +scatterlist. This > > > > > + * can be used as the &dma_buf_ops.map_dma_buf callback. > > > > > + * > > > > > + * Returns sg_table containing the scatterlist to be returned; > > > > > +returns ERR_PTR > > > > > + * on error. May return -EINTR if it is interrupted by a signal. > > > > > + */ > > > > > + > > > > > struct sg_table *drm_gem_map_dma_buf(struct > dma_buf_attachment > > > *attach, > > > > > enum dma_data_direction dir) > > > > > { > > > > > @@ -294,6 +329,12 @@ struct sg_table > *drm_gem_map_dma_buf(struct > > > dma_buf_attachment *attach, > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_map_dma_buf); > > > > > +/** > > > > > + * drm_gem_unmap_dma_buf - unmap_dma_buf implementation > for > > > GEM > > > > > + * > > > > > + * Not implemented. The unmap is done at > drm_gem_map_detach(). > > > > > +This can be > > > > > + * used as the &dma_buf_ops.unmap_dma_buf callback. > > > > > + */ > > > > > void drm_gem_unmap_dma_buf(struct dma_buf_attachment > *attach, > > > > > struct sg_table *sgt, > > > > > enum dma_data_direction dir) @@ -351,6 > +392,15 > > > @@ void > > > > > drm_gem_dmabuf_release(struct dma_buf *dma_buf) > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_release); > > > > > +/** > > > > > + * drm_gem_dmabuf_vmap - dma_buf vmap implementation for > GEM > > > > > + * @dma_buf: buffer to be mapped > > > > > + * > > > > > + * Sets up a kernel virtual mapping. This can be used as the > > > > > +&dma_buf_ops.vmap > > > > > + * callback. > > > > > + * > > > > > + * Returns the kernel virtual address. > > > > > + */ > > > > > void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf) > > > > > { > > > > > struct drm_gem_object *obj = dma_buf->priv; @@ -360,6 > +410,14 > > > @@ > > > > > void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf) > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_vmap); > > > > > +/** > > > > > + * drm_gem_dmabuf_vunmap - dma_buf vunmap implementation > for > > > GEM > > > > > + * @dma_buf: buffer to be unmapped > > > > > + * @vaddr: the virtual address of the buffer > > > > > + * > > > > > + * Releases a kernel virtual mapping. This can be used as the > > > > > + * &dma_buf_ops.vunmap callback. > > > > > + */ > > > > > void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void > > > *vaddr) > > > > > { > > > > > struct drm_gem_object *obj = dma_buf->priv; @@ -369,6 > +427,11 > > > @@ > > > > > void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void > *vaddr) > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_vunmap); > > > > > +/** > > > > > + * drm_gem_dmabuf_kmap_atomic - map_atomic implementation > for > > > GEM > > > > > + * > > > > > + * Not implemented. This can be used as the > > > &dma_buf_ops.map_atomic callback. > > > > > + */ > > > > > void *drm_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, > > > > > unsigned long page_num) > > > > > { > > > > > @@ -376,6 +439,11 @@ void > *drm_gem_dmabuf_kmap_atomic(struct > > > dma_buf *dma_buf, > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_kmap_atomic); > > > > > +/** > > > > > + * drm_gem_dmabuf_kunmap_atomic - unmap_atomic > > > implementation for > > > > > +GEM > > > > > + * > > > > > + * Not implemented. This can be used as the > > > &dma_buf_ops.unmap_atomic callback. > > > > > + */ > > > > > void drm_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, > > > > > unsigned long page_num, void > *addr) > > > > > { > > > > > @@ -383,12 +451,22 @@ void > drm_gem_dmabuf_kunmap_atomic(struct > > > dma_buf *dma_buf, > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_kunmap_atomic); > > > > > +/** > > > > > + * drm_gem_dmabuf_kmap - map implementation for GEM > > > > > + * > > > > > + * Not implemented. This can be used as the &dma_buf_ops.map > > > callback. > > > > > + */ > > > > > void *drm_gem_dmabuf_kmap(struct dma_buf *dma_buf, > unsigned > > > long page_num) > > > > > { > > > > > return NULL; > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_kmap); > > > > > +/** > > > > > + * drm_gem_dmabuf_kunmap - unmap implementation for GEM > > > > > + * > > > > > + * Not implemented. This can be used as the &dma_buf_ops.unmap > > > callback. > > > > > + */ > > > > > void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf, > unsigned > > > long page_num, > > > > > void *addr) > > > > > { > > > > > @@ -396,6 +474,16 @@ void drm_gem_dmabuf_kunmap(struct > > > dma_buf *dma_buf, unsigned long page_num, > > > > > } > > > > > EXPORT_SYMBOL(drm_gem_dmabuf_kunmap); > > > > > +/** > > > > > + * drm_gem_dmabuf_mmap - dma_buf mmap implementation for > > > GEM > > > > > + * @dma_buf: buffer to be mapped > > > > > + * @vma: virtual address range > > > > > + * > > > > > + * Provides memory mapping for the buffer. This can be used as > > > > > + the > > > > > + * &dma_buf_ops.mmap callback. > > > > > + * > > > > > + * Returns 0 on success or a negative error code on failure. > > > > > + */ > > > > > int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct > > > vm_area_struct *vma) > > > > > { > > > > > struct drm_gem_object *obj = dma_buf->priv; > > > > > > > > _______________________________________________ > > > > dri-devel mailing list > > > > dri-devel at lists.freedesktop.org > > > > https://lists.freedesktop.org/mailman/listinfo/dri-devel > > > > > > -- > > > Daniel Vetter > > > Software Engineer, Intel Corporation http://blog.ffwll.ch > > -- > Daniel Vetter > Software Engineer, Intel Corporation > http://blog.ffwll.ch
