diff options
Diffstat (limited to 'drivers/char/exynos_mem.c')
-rw-r--r-- | drivers/char/exynos_mem.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/drivers/char/exynos_mem.c b/drivers/char/exynos_mem.c index fdbaf4d..85c7a29 100644 --- a/drivers/char/exynos_mem.c +++ b/drivers/char/exynos_mem.c @@ -241,47 +241,14 @@ static struct vm_operations_struct exynos_mem_ops = { .close = exynos_mem_mmap_close, }; -static struct simple_cma_descriptor cmad_container[CMA_REGION_COUNT]; -static int cmad_container_stored = 0; - -void cma_region_descriptor_add(const char *name, int start, int size) -{ - int i; - - pr_info("[%s] adding [%s] (0x%08x)-(0x%08x)\n", - __func__, name, start, size); - - if(cmad_container_stored == CMA_REGION_COUNT - 1) - return; - - i = cmad_container_stored; - - cmad_container[i].name = name; - cmad_container[i].start = start; - cmad_container[i].size = size; - - cmad_container_stored++; - -} - int exynos_mem_mmap(struct file *filp, struct vm_area_struct *vma) { - -/* Devices not having DMA CMA acess shouldn't be using this in any case at all */ -#ifndef CONFIG_DMA_CMA - return -EINVAL; -#endif - struct exynos_mem *mem = (struct exynos_mem *)filp->private_data; bool cacheable = mem->cacheable; dma_addr_t start = 0; u32 pfn = 0; u32 size = vma->vm_end - vma->vm_start; - int i, allowed; - struct simple_cma_descriptor *b; - allowed = false; - if (vma->vm_pgoff) { start = vma->vm_pgoff << PAGE_SHIFT; pfn = vma->vm_pgoff; @@ -290,50 +257,6 @@ int exynos_mem_mmap(struct file *filp, struct vm_area_struct *vma) pfn = mem->phybase; } - pr_info("[%s] requesting access to (0x%08x)-(0x%08x)\n", - __func__, start, (start + size)); - - b = (struct simple_cma_descriptor*)&cmad_container; - - /* Go over all of the defined CMA blocks */ - for(i = 0; i < cmad_container_stored; i++) { - - pr_info("[%s] Checking space paddr(0x%08x)-(0x%08x) from '%s'\n", - __func__, b->start, (b->start + b->size), b->name); - - /* Check if the requested space is within this current CMA block */ - if(start >= b->start && (start + size) <= (b->start + b->size)){ - - /* Further only conditionally whitelist spaces that we know - * break device functionality if we don't allow access. - * - * Add exceptions as we go. - */ - - if(strcmp(b->name, "s3c-fimc") == 0) { - allowed = true; - pr_info("[%s] Accessing space 0x%08x/0x%08x for '%s'\n", - __func__, b->start, b->size, b->name); - } - else{ - pr_info("[%s] No love for '%s' wanting (0x%08x)-(0x%08x) in (0x%08x)-(0x%08x)\n", - __func__, b->name, start, (start + size), b->start, (b->start + b->size)); - } - - } - - b++; - } - - if (!allowed) { - /* The requested memory space isn't in any CMA block, deny access */ - pr_err("[%s] invalid paddr(0x%08x)-(0x%08x), accessing outside of DMA spaces\n", - __func__, start, (start + size)); - return -EINVAL; - } - - /* The check below doesn't matter anymore */ - /* TODO: currently lowmem is only avaiable */ if ((phys_to_virt(start) < (void *)PAGE_OFFSET) || (phys_to_virt(start) >= high_memory)) { |