From: Christoph Hellwig <hch@lst.de> To: Mauro Carvalho Chehab <mchehab@kernel.org>, Marek Szyprowski <m.szyprowski@samsung.com>, Tomasz Figa <tfiga@chromium.org>, Ricardo Ribalda <ribalda@chromium.org>, Sergey Senozhatsky <senozhatsky@google.com>, iommu@lists.linux-foundation.org Cc: Robin Murphy <robin.murphy@arm.com>, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH 3/7] dma-mapping: refactor dma_{alloc,free}_pages Date: Tue, 2 Feb 2021 10:51:06 +0100 [thread overview] Message-ID: <20210202095110.1215346-4-hch@lst.de> (raw) In-Reply-To: <20210202095110.1215346-1-hch@lst.de> Factour out internal versions without the dma_debug calls in preparation for callers that will need different dma_debug calls. Note that this changes the dma_debug calls to get the not page aligned size values, but as long as alloc and free agree on one variant we are fine. Signed-off-by: Christoph Hellwig <hch@lst.de> --- kernel/dma/mapping.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index c1e515496c067b..5e87dac6cc6d9a 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -475,11 +475,10 @@ void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr, } EXPORT_SYMBOL(dma_free_attrs); -struct page *dma_alloc_pages(struct device *dev, size_t size, +static struct page *__dma_alloc_pages(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) { const struct dma_map_ops *ops = get_dma_ops(dev); - struct page *page; if (WARN_ON_ONCE(!dev->coherent_dma_mask)) return NULL; @@ -488,31 +487,41 @@ struct page *dma_alloc_pages(struct device *dev, size_t size, size = PAGE_ALIGN(size); if (dma_alloc_direct(dev, ops)) - page = dma_direct_alloc_pages(dev, size, dma_handle, dir, gfp); - else if (ops->alloc_pages) - page = ops->alloc_pages(dev, size, dma_handle, dir, gfp); - else + return dma_direct_alloc_pages(dev, size, dma_handle, dir, gfp); + if (!ops->alloc_pages) return NULL; + return ops->alloc_pages(dev, size, dma_handle, dir, gfp); +} - debug_dma_map_page(dev, page, 0, size, dir, *dma_handle); +struct page *dma_alloc_pages(struct device *dev, size_t size, + dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) +{ + struct page *page = __dma_alloc_pages(dev, size, dma_handle, dir, gfp); + if (page) + debug_dma_map_page(dev, page, 0, size, dir, *dma_handle); return page; } EXPORT_SYMBOL_GPL(dma_alloc_pages); -void dma_free_pages(struct device *dev, size_t size, struct page *page, +static void __dma_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_handle, enum dma_data_direction dir) { const struct dma_map_ops *ops = get_dma_ops(dev); size = PAGE_ALIGN(size); - debug_dma_unmap_page(dev, dma_handle, size, dir); - if (dma_alloc_direct(dev, ops)) dma_direct_free_pages(dev, size, page, dma_handle, dir); else if (ops->free_pages) ops->free_pages(dev, size, page, dma_handle, dir); } + +void dma_free_pages(struct device *dev, size_t size, struct page *page, + dma_addr_t dma_handle, enum dma_data_direction dir) +{ + debug_dma_unmap_page(dev, dma_handle, size, dir); + __dma_free_pages(dev, size, page, dma_handle, dir); +} EXPORT_SYMBOL_GPL(dma_free_pages); int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, -- 2.29.2
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de> To: Mauro Carvalho Chehab <mchehab@kernel.org>, Marek Szyprowski <m.szyprowski@samsung.com>, Tomasz Figa <tfiga@chromium.org>, Ricardo Ribalda <ribalda@chromium.org>, Sergey Senozhatsky <senozhatsky@google.com>, iommu@lists.linux-foundation.org Cc: linux-media@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH 3/7] dma-mapping: refactor dma_{alloc,free}_pages Date: Tue, 2 Feb 2021 10:51:06 +0100 [thread overview] Message-ID: <20210202095110.1215346-4-hch@lst.de> (raw) In-Reply-To: <20210202095110.1215346-1-hch@lst.de> Factour out internal versions without the dma_debug calls in preparation for callers that will need different dma_debug calls. Note that this changes the dma_debug calls to get the not page aligned size values, but as long as alloc and free agree on one variant we are fine. Signed-off-by: Christoph Hellwig <hch@lst.de> --- kernel/dma/mapping.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index c1e515496c067b..5e87dac6cc6d9a 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -475,11 +475,10 @@ void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr, } EXPORT_SYMBOL(dma_free_attrs); -struct page *dma_alloc_pages(struct device *dev, size_t size, +static struct page *__dma_alloc_pages(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) { const struct dma_map_ops *ops = get_dma_ops(dev); - struct page *page; if (WARN_ON_ONCE(!dev->coherent_dma_mask)) return NULL; @@ -488,31 +487,41 @@ struct page *dma_alloc_pages(struct device *dev, size_t size, size = PAGE_ALIGN(size); if (dma_alloc_direct(dev, ops)) - page = dma_direct_alloc_pages(dev, size, dma_handle, dir, gfp); - else if (ops->alloc_pages) - page = ops->alloc_pages(dev, size, dma_handle, dir, gfp); - else + return dma_direct_alloc_pages(dev, size, dma_handle, dir, gfp); + if (!ops->alloc_pages) return NULL; + return ops->alloc_pages(dev, size, dma_handle, dir, gfp); +} - debug_dma_map_page(dev, page, 0, size, dir, *dma_handle); +struct page *dma_alloc_pages(struct device *dev, size_t size, + dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) +{ + struct page *page = __dma_alloc_pages(dev, size, dma_handle, dir, gfp); + if (page) + debug_dma_map_page(dev, page, 0, size, dir, *dma_handle); return page; } EXPORT_SYMBOL_GPL(dma_alloc_pages); -void dma_free_pages(struct device *dev, size_t size, struct page *page, +static void __dma_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_handle, enum dma_data_direction dir) { const struct dma_map_ops *ops = get_dma_ops(dev); size = PAGE_ALIGN(size); - debug_dma_unmap_page(dev, dma_handle, size, dir); - if (dma_alloc_direct(dev, ops)) dma_direct_free_pages(dev, size, page, dma_handle, dir); else if (ops->free_pages) ops->free_pages(dev, size, page, dma_handle, dir); } + +void dma_free_pages(struct device *dev, size_t size, struct page *page, + dma_addr_t dma_handle, enum dma_data_direction dir) +{ + debug_dma_unmap_page(dev, dma_handle, size, dir); + __dma_free_pages(dev, size, page, dma_handle, dir); +} EXPORT_SYMBOL_GPL(dma_free_pages); int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, -- 2.29.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-02-02 9:53 UTC|newest] Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-02 9:51 add a new dma_alloc_noncontiguous API v2 Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-02 9:51 ` [PATCH 1/7] dma-mapping: remove the {alloc,free}_noncoherent methods Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-02 9:51 ` [PATCH 2/7] dma-mapping: add a dma_mmap_pages helper Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig [this message] 2021-02-02 9:51 ` [PATCH 3/7] dma-mapping: refactor dma_{alloc,free}_pages Christoph Hellwig 2021-02-02 9:51 ` [PATCH 4/7] dma-mapping: add a dma_alloc_noncontiguous API Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-16 18:55 ` Robin Murphy 2021-02-16 18:55 ` Robin Murphy 2021-03-01 8:09 ` Christoph Hellwig 2021-03-01 8:09 ` Christoph Hellwig 2021-02-02 9:51 ` [PATCH 5/7] dma-iommu: refactor iommu_dma_alloc_remap Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-02 9:51 ` [PATCH 6/7] dma-iommu: implement ->alloc_noncontiguous Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-16 8:14 ` Tomasz Figa 2021-02-16 8:14 ` Tomasz Figa 2021-02-16 8:49 ` Christoph Hellwig 2021-02-16 8:49 ` Christoph Hellwig 2021-03-01 7:17 ` Sergey Senozhatsky 2021-03-01 7:17 ` Sergey Senozhatsky 2021-03-01 7:21 ` Christoph Hellwig 2021-03-01 7:21 ` Christoph Hellwig 2021-03-01 8:02 ` Sergey Senozhatsky 2021-03-01 8:02 ` Sergey Senozhatsky 2021-03-01 8:11 ` Christoph Hellwig 2021-03-01 8:11 ` Christoph Hellwig 2021-02-02 9:51 ` [PATCH 7/7] media: uvcvideo: Use dma_alloc_noncontiguos API Christoph Hellwig 2021-02-02 9:51 ` Christoph Hellwig 2021-02-04 7:39 ` Hillf Danton 2021-02-07 18:48 ` add a new dma_alloc_noncontiguous API v2 Christoph Hellwig 2021-02-07 18:48 ` Christoph Hellwig 2021-02-08 11:33 ` Tomasz Figa 2021-02-08 11:33 ` Tomasz Figa 2021-02-09 8:22 ` Christoph Hellwig 2021-02-09 8:29 ` Ricardo Ribalda 2021-02-09 8:29 ` Ricardo Ribalda 2021-02-09 14:46 ` Ricardo Ribalda 2021-02-09 14:46 ` Ricardo Ribalda 2021-02-09 17:02 ` Christoph Hellwig 2021-02-11 9:08 ` Ricardo Ribalda 2021-02-11 9:08 ` Ricardo Ribalda 2021-02-11 13:06 ` Christoph Hellwig 2021-02-11 13:06 ` Christoph Hellwig 2021-02-11 13:20 ` Ricardo Ribalda 2021-02-11 13:20 ` Ricardo Ribalda 2021-02-11 13:55 ` Laurent Pinchart 2021-02-11 13:55 ` Laurent Pinchart
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