From patchwork Tue Sep 29 15:14:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 11806217 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 08FD0112E for ; Tue, 29 Sep 2020 15:14:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E86E1221E7 for ; Tue, 29 Sep 2020 15:14:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731605AbgI2POq (ORCPT ); Tue, 29 Sep 2020 11:14:46 -0400 Received: from mx2.suse.de ([195.135.220.15]:59918 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730942AbgI2POp (ORCPT ); Tue, 29 Sep 2020 11:14:45 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 2E9C7AFB8; Tue, 29 Sep 2020 15:14:43 +0000 (UTC) From: Thomas Zimmermann To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@linux.ie, daniel@ffwll.ch, sam@ravnborg.org, alexander.deucher@amd.com, christian.koenig@amd.com, kraxel@redhat.com, l.stach@pengutronix.de, linux+etnaviv@armlinux.org.uk, christian.gmeiner@gmail.com, inki.dae@samsung.com, jy0922.shim@samsung.com, sw0312.kim@samsung.com, kyungmin.park@samsung.com, kgene@kernel.org, krzk@kernel.org, yuq825@gmail.com, bskeggs@redhat.com, robh@kernel.org, tomeu.vizoso@collabora.com, steven.price@arm.com, alyssa.rosenzweig@collabora.com, hjc@rock-chips.com, heiko@sntech.de, hdegoede@redhat.com, sean@poorly.run, eric@anholt.net, oleksandr_andrushchenko@epam.com, ray.huang@amd.com, sumit.semwal@linaro.org, emil.velikov@collabora.com, luben.tuikov@amd.com, apaneers@amd.com, linus.walleij@linaro.org, melissa.srw@gmail.com, chris@chris-wilson.co.uk, miaoqinglang@huawei.com Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, virtualization@lists.linux-foundation.org, etnaviv@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, lima@lists.freedesktop.org, nouveau@lists.freedesktop.org, spice-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xenproject.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Thomas Zimmermann Subject: [PATCH v3 2/7] drm/ttm: Add ttm_kmap_obj_to_dma_buf_map() for type conversion Date: Tue, 29 Sep 2020 17:14:32 +0200 Message-Id: <20200929151437.19717-3-tzimmermann@suse.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929151437.19717-1-tzimmermann@suse.de> References: <20200929151437.19717-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org The new helper ttm_kmap_obj_to_dma_buf() extracts address and location from and instance of TTM's kmap_obj and initializes struct dma_buf_map with these values. Helpful for TTM-based drivers. Signed-off-by: Thomas Zimmermann --- include/drm/ttm/ttm_bo_api.h | 24 ++++++++++++++++++++++++ include/linux/dma-buf-map.h | 20 ++++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h index c96a25d571c8..62d89f05a801 100644 --- a/include/drm/ttm/ttm_bo_api.h +++ b/include/drm/ttm/ttm_bo_api.h @@ -34,6 +34,7 @@ #include #include #include +#include #include #include #include @@ -486,6 +487,29 @@ static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map, return map->virtual; } +/** + * ttm_kmap_obj_to_dma_buf_map + * + * @kmap: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap. + * @map: Returns the mapping as struct dma_buf_map + * + * Converts struct ttm_bo_kmap_obj to struct dma_buf_map. If the memory + * is not mapped, the returned mapping is initialized to NULL. + */ +static inline void ttm_kmap_obj_to_dma_buf_map(struct ttm_bo_kmap_obj *kmap, + struct dma_buf_map *map) +{ + bool is_iomem; + void *vaddr = ttm_kmap_obj_virtual(kmap, &is_iomem); + + if (!vaddr) + dma_buf_map_clear(map); + else if (is_iomem) + dma_buf_map_set_vaddr_iomem(map, (void __force __iomem *)vaddr); + else + dma_buf_map_set_vaddr(map, vaddr); +} + /** * ttm_bo_kmap * diff --git a/include/linux/dma-buf-map.h b/include/linux/dma-buf-map.h index fd1aba545fdf..2e8bbecb5091 100644 --- a/include/linux/dma-buf-map.h +++ b/include/linux/dma-buf-map.h @@ -45,6 +45,12 @@ * * dma_buf_map_set_vaddr(&map. 0xdeadbeaf); * + * To set an address in I/O memory, use dma_buf_map_set_vaddr_iomem(). + * + * .. code-block:: c + * + * dma_buf_map_set_vaddr_iomem(&map. 0xdeadbeaf); + * * Test if a mapping is valid with either dma_buf_map_is_set() or * dma_buf_map_is_null(). * @@ -118,6 +124,20 @@ static inline void dma_buf_map_set_vaddr(struct dma_buf_map *map, void *vaddr) map->is_iomem = false; } +/** + * dma_buf_map_set_vaddr_iomem - Sets a dma-buf mapping structure to an address in I/O memory + * @map: The dma-buf mapping structure + * @vaddr_iomem: An I/O-memory address + * + * Sets the address and the I/O-memory flag. + */ +static inline void dma_buf_map_set_vaddr_iomem(struct dma_buf_map *map, + void __iomem *vaddr_iomem) +{ + map->vaddr_iomem = vaddr_iomem; + map->is_iomem = true; +} + /** * dma_buf_map_is_equal - Compares two dma-buf mapping structures for equality * @lhs: The dma-buf mapping structure