X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fmedia%2Fvideo%2Fvideobuf-dma-sg.c;h=03a7b946bd5448b4b5e471836fd8469bdfc492c8;hb=c36c804559d3a891a2e655ba8185b4fa7eaee156;hp=98efd7ab1f50a5467c5d543cdbb37573df5f8571;hpb=8f859016ea49cd8d7c743533bd1ab3db9a813ffa;p=linux-2.6 diff --git a/drivers/media/video/videobuf-dma-sg.c b/drivers/media/video/videobuf-dma-sg.c index 98efd7ab1f..03a7b946bd 100644 --- a/drivers/media/video/videobuf-dma-sg.c +++ b/drivers/media/video/videobuf-dma-sg.c @@ -1,5 +1,5 @@ /* - * helper functions for PCI DMA video4linux capture buffers + * helper functions for SG DMA video4linux capture buffers * * The functions expect the hardware being able to scatter gatter * (i.e. the buffers are not linear in physical memory, but fragmented @@ -24,7 +24,7 @@ #include #include -#include +#include #include #include #include @@ -39,10 +39,10 @@ #define MAGIC_CHECK(is,should) if (unlikely((is) != (should))) \ { printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); } -static int debug = 0; +static int debug; module_param(debug, int, 0644); -MODULE_DESCRIPTION("helper module to manage video4linux pci dma sg buffers"); +MODULE_DESCRIPTION("helper module to manage video4linux dma sg buffers"); MODULE_AUTHOR("Mauro Carvalho Chehab "); MODULE_LICENSE("GPL"); @@ -119,10 +119,10 @@ videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset) struct videobuf_dmabuf *videobuf_to_dma (struct videobuf_buffer *buf) { - struct videbuf_pci_sg_memory *mem=buf->priv; - BUG_ON (!mem); + struct videobuf_dma_sg_memory *mem = buf->priv; + BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); return &mem->dma; } @@ -141,9 +141,14 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, dma->direction = direction; switch (dma->direction) { - case PCI_DMA_FROMDEVICE: rw = READ; break; - case PCI_DMA_TODEVICE: rw = WRITE; break; - default: BUG(); + case DMA_FROM_DEVICE: + rw = READ; + break; + case DMA_TO_DEVICE: + rw = WRITE; + break; + default: + BUG(); } first = (data & PAGE_MASK) >> PAGE_SHIFT; @@ -157,9 +162,6 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, dprintk(1,"init user [0x%lx+0x%lx => %d pages]\n", data,size,dma->nr_pages); - dma->varea = (void *) data; - - err = get_user_pages(current,current->mm, data & PAGE_MASK, dma->nr_pages, rw == READ, 1, /* force */ @@ -216,10 +218,8 @@ int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction, return 0; } -int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma) +int videobuf_dma_map(struct videobuf_queue* q, struct videobuf_dmabuf *dma) { - void *dev=q->dev; - MAGIC_CHECK(dma->magic,MAGIC_DMABUF); BUG_ON(0 == dma->nr_pages); @@ -245,11 +245,11 @@ int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma) return -ENOMEM; } if (!dma->bus_addr) { - dma->sglen = pci_map_sg(dev,dma->sglist, + dma->sglen = dma_map_sg(q->dev, dma->sglist, dma->nr_pages, dma->direction); if (0 == dma->sglen) { printk(KERN_WARNING - "%s: videobuf_map_sg failed\n",__FUNCTION__); + "%s: videobuf_map_sg failed\n",__func__); kfree(dma->sglist); dma->sglist = NULL; dma->sglen = 0; @@ -259,26 +259,22 @@ int videobuf_dma_map(struct videobuf_queue* q,struct videobuf_dmabuf *dma) return 0; } -int videobuf_dma_sync(struct videobuf_queue *q,struct videobuf_dmabuf *dma) +int videobuf_dma_sync(struct videobuf_queue *q, struct videobuf_dmabuf *dma) { - void *dev=q->dev; - - MAGIC_CHECK(dma->magic,MAGIC_DMABUF); + MAGIC_CHECK(dma->magic, MAGIC_DMABUF); BUG_ON(!dma->sglen); - pci_dma_sync_sg_for_cpu (dev,dma->sglist,dma->nr_pages,dma->direction); + dma_sync_sg_for_cpu(q->dev, dma->sglist, dma->nr_pages, dma->direction); return 0; } int videobuf_dma_unmap(struct videobuf_queue* q,struct videobuf_dmabuf *dma) { - void *dev=q->dev; - - MAGIC_CHECK(dma->magic,MAGIC_DMABUF); + MAGIC_CHECK(dma->magic, MAGIC_DMABUF); if (!dma->sglen) return 0; - pci_unmap_sg (dev,dma->sglist,dma->nr_pages,dma->direction); + dma_unmap_sg(q->dev, dma->sglist, dma->nr_pages, dma->direction); kfree(dma->sglist); dma->sglist = NULL; @@ -301,33 +297,32 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma) vfree(dma->vmalloc); dma->vmalloc = NULL; - dma->varea = NULL; if (dma->bus_addr) { dma->bus_addr = 0; } - dma->direction = PCI_DMA_NONE; + dma->direction = DMA_NONE; return 0; } /* --------------------------------------------------------------------- */ -int videobuf_pci_dma_map(struct pci_dev *pci,struct videobuf_dmabuf *dma) +int videobuf_sg_dma_map(struct device *dev, struct videobuf_dmabuf *dma) { struct videobuf_queue q; - q.dev=pci; + q.dev = dev; - return (videobuf_dma_map(&q,dma)); + return videobuf_dma_map(&q, dma); } -int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma) +int videobuf_sg_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma) { struct videobuf_queue q; - q.dev=pci; + q.dev = dev; - return (videobuf_dma_unmap(&q,dma)); + return videobuf_dma_unmap(&q, dma); } /* --------------------------------------------------------------------- */ @@ -347,7 +342,7 @@ videobuf_vm_close(struct vm_area_struct *vma) { struct videobuf_mapping *map = vma->vm_private_data; struct videobuf_queue *q = map->q; - struct videbuf_pci_sg_memory *mem; + struct videobuf_dma_sg_memory *mem; int i; dprintk(2,"vm_close %p [count=%d,vma=%08lx-%08lx]\n",map, @@ -356,7 +351,7 @@ videobuf_vm_close(struct vm_area_struct *vma) map->count--; if (0 == map->count) { dprintk(1,"munmap %p q=%p\n",map,q); - mutex_lock(&q->lock); + mutex_lock(&q->vb_lock); for (i = 0; i < VIDEO_MAX_FRAME; i++) { if (NULL == q->bufs[i]) continue; @@ -373,7 +368,7 @@ videobuf_vm_close(struct vm_area_struct *vma) q->bufs[i]->baddr = 0; q->ops->buf_release(q,q->bufs[i]); } - mutex_unlock(&q->lock); + mutex_unlock(&q->vb_lock); kfree(map); } return; @@ -409,18 +404,18 @@ static struct vm_operations_struct videobuf_vm_ops = }; /* --------------------------------------------------------------------- - * PCI handlers for the generic methods + * SG handlers for the generic methods */ /* Allocated area consists on 3 parts: struct video_buffer struct _buffer (cx88_buffer, saa7134_buf, ...) - struct videobuf_pci_sg_memory + struct videobuf_dma_sg_memory */ static void *__videobuf_alloc(size_t size) { - struct videbuf_pci_sg_memory *mem; + struct videobuf_dma_sg_memory *mem; struct videobuf_buffer *vb; vb = kzalloc(size+sizeof(*mem),GFP_KERNEL); @@ -431,22 +426,32 @@ static void *__videobuf_alloc(size_t size) videobuf_dma_init(&mem->dma); dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __FUNCTION__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb), + __func__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb), mem,(long)sizeof(*mem)); return vb; } +static void *__videobuf_to_vmalloc (struct videobuf_buffer *buf) +{ + struct videobuf_dma_sg_memory *mem = buf->priv; + BUG_ON(!mem); + + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); + + return mem->dma.vmalloc; +} + static int __videobuf_iolock (struct videobuf_queue* q, struct videobuf_buffer *vb, struct v4l2_framebuffer *fbuf) { int err,pages; dma_addr_t bus; - struct videbuf_pci_sg_memory *mem=vb->priv; + struct videobuf_dma_sg_memory *mem = vb->priv; BUG_ON(!mem); - MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); + MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); switch (vb->memory) { case V4L2_MEMORY_MMAP: @@ -455,14 +460,14 @@ static int __videobuf_iolock (struct videobuf_queue* q, /* no userspace addr -- kernel bounce buffer */ pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; err = videobuf_dma_init_kernel( &mem->dma, - PCI_DMA_FROMDEVICE, + DMA_FROM_DEVICE, pages ); if (0 != err) return err; } else if (vb->memory == V4L2_MEMORY_USERPTR) { /* dma directly to userspace */ err = videobuf_dma_init_user( &mem->dma, - PCI_DMA_FROMDEVICE, + DMA_FROM_DEVICE, vb->baddr,vb->bsize ); if (0 != err) return err; @@ -473,7 +478,7 @@ static int __videobuf_iolock (struct videobuf_queue* q, locking inversion, so don't take it here */ err = videobuf_dma_init_user_locked(&mem->dma, - PCI_DMA_FROMDEVICE, + DMA_FROM_DEVICE, vb->baddr, vb->bsize); if (0 != err) return err; @@ -490,7 +495,7 @@ static int __videobuf_iolock (struct videobuf_queue* q, */ bus = (dma_addr_t)(unsigned long)fbuf->base + vb->boff; pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_overlay(&mem->dma,PCI_DMA_FROMDEVICE, + err = videobuf_dma_init_overlay(&mem->dma, DMA_FROM_DEVICE, bus, pages); if (0 != err) return err; @@ -498,7 +503,7 @@ static int __videobuf_iolock (struct videobuf_queue* q, default: BUG(); } - err = videobuf_dma_map(q,&mem->dma); + err = videobuf_dma_map(q, &mem->dma); if (0 != err) return err; @@ -508,8 +513,8 @@ static int __videobuf_iolock (struct videobuf_queue* q, static int __videobuf_sync(struct videobuf_queue *q, struct videobuf_buffer *buf) { - struct videbuf_pci_sg_memory *mem=buf->priv; - BUG_ON (!mem); + struct videobuf_dma_sg_memory *mem = buf->priv; + BUG_ON(!mem); MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); return videobuf_dma_sync(q,&mem->dma); @@ -532,7 +537,7 @@ static int __videobuf_mmap_free(struct videobuf_queue *q) static int __videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) { - struct videbuf_pci_sg_memory *mem; + struct videobuf_dma_sg_memory *mem; struct videobuf_mapping *map; unsigned int first,last,size,i; int retval; @@ -547,12 +552,20 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, goto done; } + /* This function maintains backwards compatibility with V4L1 and will + * map more than one buffer if the vma length is equal to the combined + * size of multiple buffers than it will map them together. See + * VIDIOCGMBUF in the v4l spec + * + * TODO: Allow drivers to specify if they support this mode + */ + /* look for first buffer to map */ for (first = 0; first < VIDEO_MAX_FRAME; first++) { if (NULL == q->bufs[first]) continue; mem=q->bufs[first]->priv; - BUG_ON (!mem); + BUG_ON(!mem); MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); if (V4L2_MEMORY_MMAP != q->bufs[first]->memory) @@ -591,10 +604,16 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, map = kmalloc(sizeof(struct videobuf_mapping),GFP_KERNEL); if (NULL == map) goto done; - for (size = 0, i = first; i <= last; size += q->bufs[i++]->bsize) { + + size = 0; + for (i = first; i <= last; i++) { + if (NULL == q->bufs[i]) + continue; q->bufs[i]->map = map; q->bufs[i]->baddr = vma->vm_start + size; + size += q->bufs[i]->bsize; } + map->count = 1; map->start = vma->vm_start; map->end = vma->vm_end; @@ -615,8 +634,8 @@ static int __videobuf_copy_to_user ( struct videobuf_queue *q, char __user *data, size_t count, int nonblocking ) { - struct videbuf_pci_sg_memory *mem=q->read_buf->priv; - BUG_ON (!mem); + struct videobuf_dma_sg_memory *mem = q->read_buf->priv; + BUG_ON(!mem); MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); /* copy to userspace */ @@ -634,8 +653,8 @@ static int __videobuf_copy_stream ( struct videobuf_queue *q, int vbihack, int nonblocking ) { unsigned int *fc; - struct videbuf_pci_sg_memory *mem=q->read_buf->priv; - BUG_ON (!mem); + struct videobuf_dma_sg_memory *mem = q->read_buf->priv; + BUG_ON(!mem); MAGIC_CHECK(mem->magic,MAGIC_SG_MEM); if (vbihack) { @@ -658,7 +677,7 @@ static int __videobuf_copy_stream ( struct videobuf_queue *q, return count; } -static struct videobuf_qtype_ops pci_ops = { +static struct videobuf_qtype_ops sg_ops = { .magic = MAGIC_QTYPE_OPS, .alloc = __videobuf_alloc, @@ -668,23 +687,24 @@ static struct videobuf_qtype_ops pci_ops = { .mmap_mapper = __videobuf_mmap_mapper, .video_copy_to_user = __videobuf_copy_to_user, .copy_stream = __videobuf_copy_stream, + .vmalloc = __videobuf_to_vmalloc, }; -void *videobuf_pci_alloc (size_t size) +void *videobuf_sg_alloc(size_t size) { struct videobuf_queue q; /* Required to make generic handler to call __videobuf_alloc */ - q.int_ops=&pci_ops; + q.int_ops = &sg_ops; - q.msize=size; + q.msize = size; - return videobuf_alloc (&q); + return videobuf_alloc(&q); } -void videobuf_queue_pci_init(struct videobuf_queue* q, +void videobuf_queue_sg_init(struct videobuf_queue* q, struct videobuf_queue_ops *ops, - void *dev, + struct device *dev, spinlock_t *irqlock, enum v4l2_buf_type type, enum v4l2_field field, @@ -692,7 +712,7 @@ void videobuf_queue_pci_init(struct videobuf_queue* q, void *priv) { videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &pci_ops); + priv, &sg_ops); } /* --------------------------------------------------------------------- */ @@ -709,11 +729,11 @@ EXPORT_SYMBOL_GPL(videobuf_dma_sync); EXPORT_SYMBOL_GPL(videobuf_dma_unmap); EXPORT_SYMBOL_GPL(videobuf_dma_free); -EXPORT_SYMBOL_GPL(videobuf_pci_dma_map); -EXPORT_SYMBOL_GPL(videobuf_pci_dma_unmap); -EXPORT_SYMBOL_GPL(videobuf_pci_alloc); +EXPORT_SYMBOL_GPL(videobuf_sg_dma_map); +EXPORT_SYMBOL_GPL(videobuf_sg_dma_unmap); +EXPORT_SYMBOL_GPL(videobuf_sg_alloc); -EXPORT_SYMBOL_GPL(videobuf_queue_pci_init); +EXPORT_SYMBOL_GPL(videobuf_queue_sg_init); /* * Local variables: