Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966352Ab3DQMXu (ORCPT ); Wed, 17 Apr 2013 08:23:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:7619 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966325Ab3DQMXe (ORCPT ); Wed, 17 Apr 2013 08:23:34 -0400 From: Mauro Carvalho Chehab Cc: Linux Kernel Mailing List , Clemens Ladisch , Arnd Bergmann , Takashi Iwai , Mauro Carvalho Chehab , Linux Media Mailing List Subject: [PATCH 1/2] [media] videobuf-dma-contig: remove support for cached mem Date: Wed, 17 Apr 2013 09:22:15 -0300 Message-Id: <1366201336-9481-1-git-send-email-mchehab@redhat.com> In-Reply-To: <20130417074300.33d05475@redhat.com> References: <20130417074300.33d05475@redhat.com> To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7629 Lines: 249 videobuf_queue_dma_contig_init_cached() is not used anywhere. Drop support for it, cleaning up the code a little bit. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/videobuf-dma-contig.c | 130 +++----------------------- include/media/videobuf-dma-contig.h | 10 -- 2 files changed, 14 insertions(+), 126 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf-dma-contig.c b/drivers/media/v4l2-core/videobuf-dma-contig.c index 3a43ba0..67f572c 100644 --- a/drivers/media/v4l2-core/videobuf-dma-contig.c +++ b/drivers/media/v4l2-core/videobuf-dma-contig.c @@ -27,7 +27,6 @@ struct videobuf_dma_contig_memory { u32 magic; void *vaddr; dma_addr_t dma_handle; - bool cached; unsigned long size; }; @@ -43,26 +42,8 @@ static int __videobuf_dc_alloc(struct device *dev, unsigned long size, gfp_t flags) { mem->size = size; - if (mem->cached) { - mem->vaddr = alloc_pages_exact(mem->size, flags | GFP_DMA); - if (mem->vaddr) { - int err; - - mem->dma_handle = dma_map_single(dev, mem->vaddr, - mem->size, - DMA_FROM_DEVICE); - err = dma_mapping_error(dev, mem->dma_handle); - if (err) { - dev_err(dev, "dma_map_single failed\n"); - - free_pages_exact(mem->vaddr, mem->size); - mem->vaddr = NULL; - return err; - } - } - } else - mem->vaddr = dma_alloc_coherent(dev, mem->size, - &mem->dma_handle, flags); + mem->vaddr = dma_alloc_coherent(dev, mem->size, + &mem->dma_handle, flags); if (!mem->vaddr) { dev_err(dev, "memory alloc size %ld failed\n", mem->size); @@ -77,14 +58,7 @@ static int __videobuf_dc_alloc(struct device *dev, static void __videobuf_dc_free(struct device *dev, struct videobuf_dma_contig_memory *mem) { - if (mem->cached) { - if (!mem->vaddr) - return; - dma_unmap_single(dev, mem->dma_handle, mem->size, - DMA_FROM_DEVICE); - free_pages_exact(mem->vaddr, mem->size); - } else - dma_free_coherent(dev, mem->size, mem->vaddr, mem->dma_handle); + dma_free_coherent(dev, mem->size, mem->vaddr, mem->dma_handle); mem->vaddr = NULL; } @@ -234,7 +208,7 @@ out_up: return ret; } -static struct videobuf_buffer *__videobuf_alloc_vb(size_t size, bool cached) +static struct videobuf_buffer *__videobuf_alloc(size_t size) { struct videobuf_dma_contig_memory *mem; struct videobuf_buffer *vb; @@ -244,22 +218,11 @@ static struct videobuf_buffer *__videobuf_alloc_vb(size_t size, bool cached) vb->priv = ((char *)vb) + size; mem = vb->priv; mem->magic = MAGIC_DC_MEM; - mem->cached = cached; } return vb; } -static struct videobuf_buffer *__videobuf_alloc_uncached(size_t size) -{ - return __videobuf_alloc_vb(size, false); -} - -static struct videobuf_buffer *__videobuf_alloc_cached(size_t size) -{ - return __videobuf_alloc_vb(size, true); -} - static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) { struct videobuf_dma_contig_memory *mem = buf->priv; @@ -310,19 +273,6 @@ static int __videobuf_iolock(struct videobuf_queue *q, return 0; } -static int __videobuf_sync(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - dma_sync_single_for_cpu(q->dev, mem->dma_handle, mem->size, - DMA_FROM_DEVICE); - - return 0; -} - static int __videobuf_mmap_mapper(struct videobuf_queue *q, struct videobuf_buffer *buf, struct vm_area_struct *vma) @@ -331,8 +281,6 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, struct videobuf_mapping *map; int retval; unsigned long size; - unsigned long pos, start = vma->vm_start; - struct page *page; dev_dbg(q->dev, "%s\n", __func__); @@ -359,43 +307,16 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, size = vma->vm_end - vma->vm_start; size = (size < mem->size) ? size : mem->size; - if (!mem->cached) { - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - retval = remap_pfn_range(vma, vma->vm_start, - mem->dma_handle >> PAGE_SHIFT, + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + retval = remap_pfn_range(vma, vma->vm_start, + mem->dma_handle >> PAGE_SHIFT, size, vma->vm_page_prot); - if (retval) { - dev_err(q->dev, "mmap: remap failed with error %d. ", - retval); - dma_free_coherent(q->dev, mem->size, - mem->vaddr, mem->dma_handle); - goto error; - } - } else { - pos = (unsigned long)mem->vaddr; - - while (size > 0) { - page = virt_to_page((void *)pos); - if (NULL == page) { - dev_err(q->dev, "mmap: virt_to_page failed\n"); - __videobuf_dc_free(q->dev, mem); - goto error; - } - retval = vm_insert_page(vma, start, page); - if (retval) { - dev_err(q->dev, "mmap: insert failed with error %d\n", - retval); - __videobuf_dc_free(q->dev, mem); - goto error; - } - start += PAGE_SIZE; - pos += PAGE_SIZE; - - if (size > PAGE_SIZE) - size -= PAGE_SIZE; - else - size = 0; - } + if (retval) { + dev_err(q->dev, "mmap: remap failed with error %d. ", + retval); + dma_free_coherent(q->dev, mem->size, + mem->vaddr, mem->dma_handle); + goto error; } vma->vm_ops = &videobuf_vm_ops; @@ -417,17 +338,8 @@ error: static struct videobuf_qtype_ops qops = { .magic = MAGIC_QTYPE_OPS, - .alloc_vb = __videobuf_alloc_uncached, - .iolock = __videobuf_iolock, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = __videobuf_to_vaddr, -}; - -static struct videobuf_qtype_ops qops_cached = { - .magic = MAGIC_QTYPE_OPS, - .alloc_vb = __videobuf_alloc_cached, + .alloc_vb = __videobuf_alloc, .iolock = __videobuf_iolock, - .sync = __videobuf_sync, .mmap_mapper = __videobuf_mmap_mapper, .vaddr = __videobuf_to_vaddr, }; @@ -447,20 +359,6 @@ void videobuf_queue_dma_contig_init(struct videobuf_queue *q, } EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init); -void videobuf_queue_dma_contig_init_cached(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &qops_cached, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init_cached); - dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf) { struct videobuf_dma_contig_memory *mem = buf->priv; diff --git a/include/media/videobuf-dma-contig.h b/include/media/videobuf-dma-contig.h index f473aeb..f0ed825 100644 --- a/include/media/videobuf-dma-contig.h +++ b/include/media/videobuf-dma-contig.h @@ -26,16 +26,6 @@ void videobuf_queue_dma_contig_init(struct videobuf_queue *q, void *priv, struct mutex *ext_lock); -void videobuf_queue_dma_contig_init_cached(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock); - dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); void videobuf_dma_contig_free(struct videobuf_queue *q, struct videobuf_buffer *buf); -- 1.8.1.4 -- 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/