Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751793AbbFZB2m (ORCPT ); Thu, 25 Jun 2015 21:28:42 -0400 Received: from regular1.263xmail.com ([211.150.99.135]:42642 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751196AbbFZB2g (ORCPT ); Thu, 25 Jun 2015 21:28:36 -0400 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 X-RL-SENDER: mark.yao@rock-chips.com X-FST-TO: dri-devel@lists.freedesktop.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: mark.yao@rock-chips.com X-UNIQUE-TAG: <425f01593b02646cf7524825878252a8> X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Mark Yao To: dri-devel@lists.freedesktop.org Cc: David Airlie , Heiko Stuebner , Daniel Kurtz , Mark Yao , Philipp Zabel , Daniel Vetter , Rob Clark , linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, tfiga@chromium.org, sandy.huang@rock-chips.com, dkm@rock-chips.com, zwl@rock-chips.com, xw@rock-chips.com Subject: [PATCH v2] drm/rockchip: import dma_buf to gem Date: Fri, 26 Jun 2015 09:27:18 +0800 Message-Id: <1435282038-23778-1-git-send-email-mark.yao@rock-chips.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4196 Lines: 128 We want to display a buffer allocated by other driver, need import the buffer to gem. Signed-off-by: Mark Yao --- Changes in v2: Adviced by Russell King - check sgt-nents == 1 when get iova from scatterlist - remove unused dma_map_sg/dma_unmap_sg, dma_buf_map_attachment->map_dma_buf should do the dma_map drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 1 + drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 40 +++++++++++++++++++++++++-- drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 5 +++- 3 files changed, 42 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index 3962176..9001a90 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -287,6 +287,7 @@ static struct drm_driver rockchip_drm_driver = { .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = drm_gem_prime_import, + .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table, .gem_prime_export = drm_gem_prime_export, .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table, .gem_prime_vmap = rockchip_gem_prime_vmap, diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index eb2282c..e8c4d4e 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -18,6 +18,7 @@ #include #include +#include #include "rockchip_drm_drv.h" #include "rockchip_drm_gem.h" @@ -105,6 +106,36 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma) return ret; } +struct drm_gem_object * +rockchip_gem_prime_import_sg_table(struct drm_device *drm, + struct dma_buf_attachment *attach, + struct sg_table *sgt) +{ + struct rockchip_gem_object *rk_obj; + struct drm_gem_object *obj; + + /* + * Todo: only support continuous buffer now, plan to found a method + * to import non continuous with iommu. + */ + if (sgt->nents != 1) + return ERR_PTR(-EINVAL); + + rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL); + if (!rk_obj) + return ERR_PTR(-ENOMEM); + + obj = &rk_obj->base; + + drm_gem_private_object_init(drm, obj, attach->dmabuf->size); + + rk_obj->dma_addr = sg_dma_address(sgt->sgl); + rk_obj->sgt = sgt; + obj->size = sg_dma_len(sgt->sgl); + + return obj; +} + struct rockchip_gem_object * rockchip_gem_create_object(struct drm_device *drm, unsigned int size, bool alloc_kmap) @@ -142,11 +173,14 @@ void rockchip_gem_free_object(struct drm_gem_object *obj) { struct rockchip_gem_object *rk_obj; - drm_gem_free_mmap_offset(obj); - rk_obj = to_rockchip_obj(obj); - rockchip_gem_free_buf(rk_obj); + if (obj->import_attach) { + drm_prime_gem_destroy(obj, rk_obj->sgt); + } else { + drm_gem_free_mmap_offset(obj); + rockchip_gem_free_buf(rk_obj); + } kfree(rk_obj); } diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h index ad22618..9fd58e3 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h @@ -21,6 +21,7 @@ struct rockchip_gem_object { struct drm_gem_object base; unsigned int flags; + struct sg_table *sgt; void *kvaddr; dma_addr_t dma_addr; struct dma_attrs dma_attrs; @@ -28,8 +29,10 @@ struct rockchip_gem_object { struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object * -rockchip_gem_prime_import_sg_table(struct drm_device *dev, size_t size, +rockchip_gem_prime_import_sg_table(struct drm_device *drm, + struct dma_buf_attachment *attach, struct sg_table *sgt); + void *rockchip_gem_prime_vmap(struct drm_gem_object *obj); void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/