diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 122 |
1 files changed, 21 insertions, 101 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c index 863a881dd7cd..30cf1cdc1aa3 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c +++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c @@ -1,26 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0-only /* - * drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c - * - * Copyright (C) 2011 Texas Instruments + * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ * Author: Rob Clark <rob.clark@linaro.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/dma-buf.h> +#include <linux/highmem.h> + +#include <drm/drm_prime.h> #include "omap_drv.h" +MODULE_IMPORT_NS("DMA_BUF"); + /* ----------------------------------------------------------------------------- * DMABUF Export */ @@ -31,45 +23,18 @@ static struct sg_table *omap_gem_map_dma_buf( { struct drm_gem_object *obj = attachment->dmabuf->priv; struct sg_table *sg; - dma_addr_t dma_addr; - int ret; - - sg = kzalloc(sizeof(*sg), GFP_KERNEL); - if (!sg) - return ERR_PTR(-ENOMEM); - - /* camera, etc, need physically contiguous.. but we need a - * better way to know this.. - */ - ret = omap_gem_pin(obj, &dma_addr); - if (ret) - goto out; - - ret = sg_alloc_table(sg, 1, GFP_KERNEL); - if (ret) - goto out; - - sg_init_table(sg->sgl, 1); - sg_dma_len(sg->sgl) = obj->size; - sg_set_page(sg->sgl, pfn_to_page(PFN_DOWN(dma_addr)), obj->size, 0); - sg_dma_address(sg->sgl) = dma_addr; - - /* this must be after omap_gem_pin() to ensure we have pages attached */ - omap_gem_dma_sync_buffer(obj, dir); + sg = omap_gem_get_sg(obj, dir); + if (IS_ERR(sg)) + return sg; return sg; -out: - kfree(sg); - return ERR_PTR(ret); } static void omap_gem_unmap_dma_buf(struct dma_buf_attachment *attachment, struct sg_table *sg, enum dma_data_direction dir) { struct drm_gem_object *obj = attachment->dmabuf->priv; - omap_gem_unpin(obj); - sg_free_table(sg); - kfree(sg); + omap_gem_put_sg(obj, sg); } static int omap_gem_dmabuf_begin_cpu_access(struct dma_buf *buffer, @@ -77,7 +42,7 @@ static int omap_gem_dmabuf_begin_cpu_access(struct dma_buf *buffer, { struct drm_gem_object *obj = buffer->priv; struct page **pages; - if (omap_gem_flags(obj) & OMAP_BO_TILED) { + if (omap_gem_flags(obj) & OMAP_BO_TILED_MASK) { /* TODO we would need to pin at least part of the buffer to * get de-tiled view. For now just reject it. */ @@ -95,79 +60,34 @@ static int omap_gem_dmabuf_end_cpu_access(struct dma_buf *buffer, return 0; } - -static void *omap_gem_dmabuf_kmap_atomic(struct dma_buf *buffer, - unsigned long page_num) -{ - struct drm_gem_object *obj = buffer->priv; - struct page **pages; - omap_gem_get_pages(obj, &pages, false); - omap_gem_cpu_sync_page(obj, page_num); - return kmap_atomic(pages[page_num]); -} - -static void omap_gem_dmabuf_kunmap_atomic(struct dma_buf *buffer, - unsigned long page_num, void *addr) -{ - kunmap_atomic(addr); -} - -static void *omap_gem_dmabuf_kmap(struct dma_buf *buffer, - unsigned long page_num) -{ - struct drm_gem_object *obj = buffer->priv; - struct page **pages; - omap_gem_get_pages(obj, &pages, false); - omap_gem_cpu_sync_page(obj, page_num); - return kmap(pages[page_num]); -} - -static void omap_gem_dmabuf_kunmap(struct dma_buf *buffer, - unsigned long page_num, void *addr) -{ - struct drm_gem_object *obj = buffer->priv; - struct page **pages; - omap_gem_get_pages(obj, &pages, false); - kunmap(pages[page_num]); -} - static int omap_gem_dmabuf_mmap(struct dma_buf *buffer, struct vm_area_struct *vma) { struct drm_gem_object *obj = buffer->priv; - int ret = 0; - - ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma); - if (ret < 0) - return ret; - return omap_gem_mmap_obj(obj, vma); + return drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma); } -static struct dma_buf_ops omap_dmabuf_ops = { +static const struct dma_buf_ops omap_dmabuf_ops = { .map_dma_buf = omap_gem_map_dma_buf, .unmap_dma_buf = omap_gem_unmap_dma_buf, .release = drm_gem_dmabuf_release, .begin_cpu_access = omap_gem_dmabuf_begin_cpu_access, .end_cpu_access = omap_gem_dmabuf_end_cpu_access, - .map_atomic = omap_gem_dmabuf_kmap_atomic, - .unmap_atomic = omap_gem_dmabuf_kunmap_atomic, - .map = omap_gem_dmabuf_kmap, - .unmap = omap_gem_dmabuf_kunmap, .mmap = omap_gem_dmabuf_mmap, }; -struct dma_buf *omap_gem_prime_export(struct drm_device *dev, - struct drm_gem_object *obj, int flags) +struct dma_buf *omap_gem_prime_export(struct drm_gem_object *obj, int flags) { DEFINE_DMA_BUF_EXPORT_INFO(exp_info); exp_info.ops = &omap_dmabuf_ops; - exp_info.size = obj->size; + exp_info.size = omap_gem_mmap_size(obj); exp_info.flags = flags; exp_info.priv = obj; + exp_info.resv = obj->resv; - return drm_gem_dmabuf_export(dev, &exp_info); + return drm_gem_dmabuf_export(obj->dev, &exp_info); } /* ----------------------------------------------------------------------------- @@ -189,7 +109,7 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev, * Importing dmabuf exported from out own gem increases * refcount on gem itself instead of f_count of dmabuf. */ - drm_gem_object_reference(obj); + drm_gem_object_get(obj); return obj; } } @@ -200,7 +120,7 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev, get_dma_buf(dma_buf); - sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE); + sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE); if (IS_ERR(sgt)) { ret = PTR_ERR(sgt); goto fail_detach; @@ -217,7 +137,7 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev, return obj; fail_unmap: - dma_buf_unmap_attachment(attach, sgt, DMA_TO_DEVICE); + dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_TO_DEVICE); fail_detach: dma_buf_detach(dma_buf, attach); dma_buf_put(dma_buf); |