C++ (Cpp) dma_mmap_nonconsistent Exemples

Exemple #1

Fichier : ion_cma_heap.c Projet : souljasteve84/Engine-SM_N9005

static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer,
			struct vm_area_struct *vma)
{
	struct device *dev = buffer->heap->priv;
	struct ion_cma_buffer_info *info = buffer->priv_virt;
#ifdef CONFIG_TIMA_RKP
        if (buffer->size) {
        /* iommu optimization- needs to be turned ON from
         * the tz side.
         */
                cpu_v7_tima_iommu_opt(vma->vm_start, vma->vm_end, (unsigned long)vma->vm_mm->pgd);
                __asm__ __volatile__ (
                "mcr    p15, 0, r0, c8, c3, 0\n"
                "dsb\n"
                "isb\n");
        }
#endif

	if (info->is_cached)
		return dma_mmap_nonconsistent(dev, vma, info->cpu_addr,
				info->handle, buffer->size);
	else
		return dma_mmap_writecombine(dev, vma, info->cpu_addr,
				info->handle, buffer->size);
}

Exemple #2

static int ion_cma_mmap(struct ion_heap *mapper, struct ion_buffer *buffer,
			struct vm_area_struct *vma)
{
	struct device *dev = buffer->heap->priv;
	struct ion_cma_buffer_info *info = buffer->priv_virt;

	if (info->is_cached)
		return dma_mmap_nonconsistent(dev, vma, info->cpu_addr,
				info->handle, buffer->size);
	else
		return dma_mmap_writecombine(dev, vma, info->cpu_addr,
				info->handle, buffer->size);
}