From: Jan Kara <jack@suse.cz> To: Andrew Morton <akpm@linux-foundation.org> Cc: Hans Verkuil <hverkuil@xs4all.nl>, linux-media@vger.kernel.org, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, linux-samsung-soc@vger.kernel.org, linux-mm@kvack.org, Jan Kara <jack@suse.cz> Subject: [PATCH 5/10] media: vb2: Convert vb2_dma_sg_get_userptr() to use frame vector Date: Thu, 18 Jun 2015 16:08:35 +0200 [thread overview] Message-ID: <1434636520-25116-6-git-send-email-jack@suse.cz> (raw) In-Reply-To: <1434636520-25116-1-git-send-email-jack@suse.cz> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz> --- drivers/media/v4l2-core/videobuf2-dma-sg.c | 95 +++++------------------------- 1 file changed, 15 insertions(+), 80 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c index cdcf5ad79012..4ee1b3fbfe2a 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c @@ -38,6 +38,7 @@ struct vb2_dma_sg_buf { struct device *dev; void *vaddr; struct page **pages; + struct frame_vector *vec; int offset; enum dma_data_direction dma_dir; struct sg_table sg_table; @@ -51,7 +52,6 @@ struct vb2_dma_sg_buf { unsigned int num_pages; atomic_t refcount; struct vb2_vmarea_handler handler; - struct vm_area_struct *vma; struct dma_buf_attachment *db_attach; }; @@ -224,25 +224,17 @@ static void vb2_dma_sg_finish(void *buf_priv) dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); } -static inline int vma_is_io(struct vm_area_struct *vma) -{ - return !!(vma->vm_flags & (VM_IO | VM_PFNMAP)); -} - static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, unsigned long size, enum dma_data_direction dma_dir) { struct vb2_dma_sg_conf *conf = alloc_ctx; struct vb2_dma_sg_buf *buf; - unsigned long first, last; - int num_pages_from_user; - struct vm_area_struct *vma; struct sg_table *sgt; DEFINE_DMA_ATTRS(attrs); + struct frame_vector *vec; dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); - buf = kzalloc(sizeof *buf, GFP_KERNEL); if (!buf) return NULL; @@ -253,63 +245,19 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, buf->offset = vaddr & ~PAGE_MASK; buf->size = size; buf->dma_sgt = &buf->sg_table; + vec = vb2_create_framevec(vaddr, size, buf->dma_dir == DMA_FROM_DEVICE); + if (IS_ERR(vec)) + goto userptr_fail_pfnvec; + buf->vec = vec; - first = (vaddr & PAGE_MASK) >> PAGE_SHIFT; - last = ((vaddr + size - 1) & PAGE_MASK) >> PAGE_SHIFT; - buf->num_pages = last - first + 1; - - buf->pages = kzalloc(buf->num_pages * sizeof(struct page *), - GFP_KERNEL); - if (!buf->pages) - goto userptr_fail_alloc_pages; - - down_read(¤t->mm->mmap_sem); - vma = find_vma(current->mm, vaddr); - if (!vma) { - dprintk(1, "no vma for address %lu\n", vaddr); - goto userptr_fail_find_vma; - } - - if (vma->vm_end < vaddr + size) { - dprintk(1, "vma at %lu is too small for %lu bytes\n", - vaddr, size); - goto userptr_fail_find_vma; - } - - buf->vma = vb2_get_vma(vma); - if (!buf->vma) { - dprintk(1, "failed to copy vma\n"); - goto userptr_fail_find_vma; - } - - if (vma_is_io(buf->vma)) { - for (num_pages_from_user = 0; - num_pages_from_user < buf->num_pages; - ++num_pages_from_user, vaddr += PAGE_SIZE) { - unsigned long pfn; - - if (follow_pfn(vma, vaddr, &pfn)) { - dprintk(1, "no page for address %lu\n", vaddr); - break; - } - buf->pages[num_pages_from_user] = pfn_to_page(pfn); - } - } else - num_pages_from_user = get_user_pages(current, current->mm, - vaddr & PAGE_MASK, - buf->num_pages, - buf->dma_dir == DMA_FROM_DEVICE, - 1, /* force */ - buf->pages, - NULL); - up_read(¤t->mm->mmap_sem); - - if (num_pages_from_user != buf->num_pages) - goto userptr_fail_get_user_pages; + buf->pages = frame_vector_pages(vec); + if (IS_ERR(buf->pages)) + goto userptr_fail_sgtable; + buf->num_pages = frame_vector_count(vec); if (sg_alloc_table_from_pages(buf->dma_sgt, buf->pages, buf->num_pages, buf->offset, size, 0)) - goto userptr_fail_alloc_table_from_pages; + goto userptr_fail_sgtable; sgt = &buf->sg_table; /* @@ -323,19 +271,9 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, userptr_fail_map: sg_free_table(&buf->sg_table); -userptr_fail_alloc_table_from_pages: -userptr_fail_get_user_pages: - dprintk(1, "get_user_pages requested/got: %d/%d]\n", - buf->num_pages, num_pages_from_user); - if (!vma_is_io(buf->vma)) - while (--num_pages_from_user >= 0) - put_page(buf->pages[num_pages_from_user]); - down_read(¤t->mm->mmap_sem); - vb2_put_vma(buf->vma); -userptr_fail_find_vma: - up_read(¤t->mm->mmap_sem); - kfree(buf->pages); -userptr_fail_alloc_pages: +userptr_fail_sgtable: + vb2_destroy_framevec(vec); +userptr_fail_pfnvec: kfree(buf); return NULL; } @@ -362,11 +300,8 @@ static void vb2_dma_sg_put_userptr(void *buf_priv) while (--i >= 0) { if (buf->dma_dir == DMA_FROM_DEVICE) set_page_dirty_lock(buf->pages[i]); - if (!vma_is_io(buf->vma)) - put_page(buf->pages[i]); } - kfree(buf->pages); - vb2_put_vma(buf->vma); + vb2_destroy_framevec(buf->vec); kfree(buf); } -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz> To: Andrew Morton <akpm@linux-foundation.org> Cc: Hans Verkuil <hverkuil@xs4all.nl>, linux-media@vger.kernel.org, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, linux-samsung-soc@vger.kernel.org, linux-mm@kvack.org, Jan Kara <jack@suse.cz> Subject: [PATCH 5/10] media: vb2: Convert vb2_dma_sg_get_userptr() to use frame vector Date: Thu, 18 Jun 2015 16:08:35 +0200 [thread overview] Message-ID: <1434636520-25116-6-git-send-email-jack@suse.cz> (raw) In-Reply-To: <1434636520-25116-1-git-send-email-jack@suse.cz> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz> --- drivers/media/v4l2-core/videobuf2-dma-sg.c | 95 +++++------------------------- 1 file changed, 15 insertions(+), 80 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c index cdcf5ad79012..4ee1b3fbfe2a 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c @@ -38,6 +38,7 @@ struct vb2_dma_sg_buf { struct device *dev; void *vaddr; struct page **pages; + struct frame_vector *vec; int offset; enum dma_data_direction dma_dir; struct sg_table sg_table; @@ -51,7 +52,6 @@ struct vb2_dma_sg_buf { unsigned int num_pages; atomic_t refcount; struct vb2_vmarea_handler handler; - struct vm_area_struct *vma; struct dma_buf_attachment *db_attach; }; @@ -224,25 +224,17 @@ static void vb2_dma_sg_finish(void *buf_priv) dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir); } -static inline int vma_is_io(struct vm_area_struct *vma) -{ - return !!(vma->vm_flags & (VM_IO | VM_PFNMAP)); -} - static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, unsigned long size, enum dma_data_direction dma_dir) { struct vb2_dma_sg_conf *conf = alloc_ctx; struct vb2_dma_sg_buf *buf; - unsigned long first, last; - int num_pages_from_user; - struct vm_area_struct *vma; struct sg_table *sgt; DEFINE_DMA_ATTRS(attrs); + struct frame_vector *vec; dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); - buf = kzalloc(sizeof *buf, GFP_KERNEL); if (!buf) return NULL; @@ -253,63 +245,19 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, buf->offset = vaddr & ~PAGE_MASK; buf->size = size; buf->dma_sgt = &buf->sg_table; + vec = vb2_create_framevec(vaddr, size, buf->dma_dir == DMA_FROM_DEVICE); + if (IS_ERR(vec)) + goto userptr_fail_pfnvec; + buf->vec = vec; - first = (vaddr & PAGE_MASK) >> PAGE_SHIFT; - last = ((vaddr + size - 1) & PAGE_MASK) >> PAGE_SHIFT; - buf->num_pages = last - first + 1; - - buf->pages = kzalloc(buf->num_pages * sizeof(struct page *), - GFP_KERNEL); - if (!buf->pages) - goto userptr_fail_alloc_pages; - - down_read(¤t->mm->mmap_sem); - vma = find_vma(current->mm, vaddr); - if (!vma) { - dprintk(1, "no vma for address %lu\n", vaddr); - goto userptr_fail_find_vma; - } - - if (vma->vm_end < vaddr + size) { - dprintk(1, "vma at %lu is too small for %lu bytes\n", - vaddr, size); - goto userptr_fail_find_vma; - } - - buf->vma = vb2_get_vma(vma); - if (!buf->vma) { - dprintk(1, "failed to copy vma\n"); - goto userptr_fail_find_vma; - } - - if (vma_is_io(buf->vma)) { - for (num_pages_from_user = 0; - num_pages_from_user < buf->num_pages; - ++num_pages_from_user, vaddr += PAGE_SIZE) { - unsigned long pfn; - - if (follow_pfn(vma, vaddr, &pfn)) { - dprintk(1, "no page for address %lu\n", vaddr); - break; - } - buf->pages[num_pages_from_user] = pfn_to_page(pfn); - } - } else - num_pages_from_user = get_user_pages(current, current->mm, - vaddr & PAGE_MASK, - buf->num_pages, - buf->dma_dir == DMA_FROM_DEVICE, - 1, /* force */ - buf->pages, - NULL); - up_read(¤t->mm->mmap_sem); - - if (num_pages_from_user != buf->num_pages) - goto userptr_fail_get_user_pages; + buf->pages = frame_vector_pages(vec); + if (IS_ERR(buf->pages)) + goto userptr_fail_sgtable; + buf->num_pages = frame_vector_count(vec); if (sg_alloc_table_from_pages(buf->dma_sgt, buf->pages, buf->num_pages, buf->offset, size, 0)) - goto userptr_fail_alloc_table_from_pages; + goto userptr_fail_sgtable; sgt = &buf->sg_table; /* @@ -323,19 +271,9 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, userptr_fail_map: sg_free_table(&buf->sg_table); -userptr_fail_alloc_table_from_pages: -userptr_fail_get_user_pages: - dprintk(1, "get_user_pages requested/got: %d/%d]\n", - buf->num_pages, num_pages_from_user); - if (!vma_is_io(buf->vma)) - while (--num_pages_from_user >= 0) - put_page(buf->pages[num_pages_from_user]); - down_read(¤t->mm->mmap_sem); - vb2_put_vma(buf->vma); -userptr_fail_find_vma: - up_read(¤t->mm->mmap_sem); - kfree(buf->pages); -userptr_fail_alloc_pages: +userptr_fail_sgtable: + vb2_destroy_framevec(vec); +userptr_fail_pfnvec: kfree(buf); return NULL; } @@ -362,11 +300,8 @@ static void vb2_dma_sg_put_userptr(void *buf_priv) while (--i >= 0) { if (buf->dma_dir == DMA_FROM_DEVICE) set_page_dirty_lock(buf->pages[i]); - if (!vma_is_io(buf->vma)) - put_page(buf->pages[i]); } - kfree(buf->pages); - vb2_put_vma(buf->vma); + vb2_destroy_framevec(buf->vec); kfree(buf); } -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-06-18 14:08 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-06-18 14:08 [PATCH 0/10 v6] Helper to abstract vma handling in media layer Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 1/10] [media] vb2: Push mmap_sem down to memops Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 2/10] mm: Provide new get_vaddr_frames() helper Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 3/10] media: omap_vout: Convert omap_vout_uservirt_to_phys() to use get_vaddr_pfns() Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 4/10] vb2: Provide helpers for mapping virtual addresses Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` Jan Kara [this message] 2015-06-18 14:08 ` [PATCH 5/10] media: vb2: Convert vb2_dma_sg_get_userptr() to use frame vector Jan Kara 2015-06-18 14:08 ` [PATCH 6/10] media: vb2: Convert vb2_vmalloc_get_userptr() " Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 7/10] media: vb2: Convert vb2_dc_get_userptr() " Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 8/10] media: vb2: Remove unused functions Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 9/10] drm/exynos: Convert g2d_userptr_get_dma_addr() to use get_vaddr_frames() Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-06-18 14:08 ` [PATCH 10/10] mm: Move get_vaddr_frames() behind a config option Jan Kara 2015-06-18 14:08 ` Jan Kara 2015-07-09 11:48 ` [PATCH 0/10 v6] Helper to abstract vma handling in media layer Jan Kara 2015-07-09 11:48 ` Jan Kara 2015-07-09 12:12 ` Hans Verkuil 2015-07-09 12:12 ` Hans Verkuil 2015-07-13 8:45 ` Hans Verkuil 2015-07-13 8:45 ` Hans Verkuil 2015-07-13 13:36 ` Jan Kara 2015-07-13 13:36 ` Jan Kara
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