From: Rebecca Schultz Zavin Date: Fri, 13 Dec 2013 22:24:26 +0000 (-0800) Subject: gpu: ion: Refactor common mapping functions out of system heap X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8898227ed555b477e2989a2a9b984fa37e7a9b42;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git gpu: ion: Refactor common mapping functions out of system heap The system heap contained several general purpose functions to map buffers to the kernel and userspace. This patch refactors those into ion_heap.c so they can be used by other heaps. Signed-off-by: Rebecca Schultz Zavin [jstultz: modified patch to apply to staging directory] Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/android/ion/ion_heap.c b/drivers/staging/android/ion/ion_heap.c index 4f7caa87bca9..441e9ef0b69c 100644 --- a/drivers/staging/android/ion/ion_heap.c +++ b/drivers/staging/android/ion/ion_heap.c @@ -15,9 +15,84 @@ */ #include +#include +#include +#include #include "ion.h" #include "ion_priv.h" +void *ion_heap_map_kernel(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + struct scatterlist *sg; + int i, j; + void *vaddr; + pgprot_t pgprot; + struct sg_table *table = buffer->sg_table; + int npages = PAGE_ALIGN(buffer->size) / PAGE_SIZE; + struct page **pages = vmalloc(sizeof(struct page *) * npages); + struct page **tmp = pages; + + if (!pages) + return 0; + + if (buffer->flags & ION_FLAG_CACHED) + pgprot = PAGE_KERNEL; + else + pgprot = pgprot_writecombine(PAGE_KERNEL); + + for_each_sg(table->sgl, sg, table->nents, i) { + int npages_this_entry = PAGE_ALIGN(sg_dma_len(sg)) / PAGE_SIZE; + struct page *page = sg_page(sg); + BUG_ON(i >= npages); + for (j = 0; j < npages_this_entry; j++) { + *(tmp++) = page++; + } + } + vaddr = vmap(pages, npages, VM_MAP, pgprot); + vfree(pages); + + return vaddr; +} + +void ion_heap_unmap_kernel(struct ion_heap *heap, + struct ion_buffer *buffer) +{ + vunmap(buffer->vaddr); +} + +int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer, + struct vm_area_struct *vma) +{ + struct sg_table *table = buffer->sg_table; + unsigned long addr = vma->vm_start; + unsigned long offset = vma->vm_pgoff * PAGE_SIZE; + struct scatterlist *sg; + int i; + + for_each_sg(table->sgl, sg, table->nents, i) { + struct page *page = sg_page(sg); + unsigned long remainder = vma->vm_end - addr; + unsigned long len = sg_dma_len(sg); + + if (offset >= sg_dma_len(sg)) { + offset -= sg_dma_len(sg); + continue; + } else if (offset) { + page += offset / PAGE_SIZE; + len = sg_dma_len(sg) - offset; + offset = 0; + } + len = min(len, remainder); + remap_pfn_range(vma, addr, page_to_pfn(page), len, + vma->vm_page_prot); + addr += len; + if (addr >= vma->vm_end) + return 0; + } + return 0; +} + struct ion_heap *ion_heap_create(struct ion_platform_heap *heap_data) { struct ion_heap *heap = NULL; diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h index 57dbf6a39fac..6b3616e31d14 100644 --- a/drivers/staging/android/ion/ion_priv.h +++ b/drivers/staging/android/ion/ion_priv.h @@ -177,6 +177,16 @@ void ion_device_destroy(struct ion_device *dev); */ void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap); +/** + * some helpers for common operations on buffers using the sg_table + * and vaddr fields + */ +void *ion_heap_map_kernel(struct ion_heap *, struct ion_buffer *); +void ion_heap_unmap_kernel(struct ion_heap *, struct ion_buffer *); +int ion_heap_map_user(struct ion_heap *, struct ion_buffer *, + struct vm_area_struct *); + + /** * functions for creating and destroying the built in ion heaps. * architectures can add their own custom architecture specific diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c index 9327a320a960..89247cf965d7 100644 --- a/drivers/staging/android/ion/ion_system_heap.c +++ b/drivers/staging/android/ion/ion_system_heap.c @@ -224,7 +224,7 @@ void ion_system_heap_free(struct ion_buffer *buffer) struct ion_system_heap *sys_heap = container_of(heap, struct ion_system_heap, heap); - struct sg_table *table = buffer->priv_virt; + struct sg_table *table = buffer->sg_table; struct scatterlist *sg; LIST_HEAD(pages); int i; @@ -247,86 +247,14 @@ void ion_system_heap_unmap_dma(struct ion_heap *heap, return; } -void *ion_system_heap_map_kernel(struct ion_heap *heap, - struct ion_buffer *buffer) -{ - struct scatterlist *sg; - int i, j; - void *vaddr; - pgprot_t pgprot; - struct sg_table *table = buffer->priv_virt; - int npages = PAGE_ALIGN(buffer->size) / PAGE_SIZE; - struct page **pages = vmalloc(sizeof(struct page *) * npages); - struct page **tmp = pages; - - if (!pages) - return 0; - - if (buffer->flags & ION_FLAG_CACHED) - pgprot = PAGE_KERNEL; - else - pgprot = pgprot_writecombine(PAGE_KERNEL); - - for_each_sg(table->sgl, sg, table->nents, i) { - int npages_this_entry = PAGE_ALIGN(sg_dma_len(sg)) / PAGE_SIZE; - struct page *page = sg_page(sg); - BUG_ON(i >= npages); - for (j = 0; j < npages_this_entry; j++) { - *(tmp++) = page++; - } - } - vaddr = vmap(pages, npages, VM_MAP, pgprot); - vfree(pages); - - return vaddr; -} - -void ion_system_heap_unmap_kernel(struct ion_heap *heap, - struct ion_buffer *buffer) -{ - vunmap(buffer->vaddr); -} - -int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer, - struct vm_area_struct *vma) -{ - struct sg_table *table = buffer->priv_virt; - unsigned long addr = vma->vm_start; - unsigned long offset = vma->vm_pgoff * PAGE_SIZE; - struct scatterlist *sg; - int i; - - for_each_sg(table->sgl, sg, table->nents, i) { - struct page *page = sg_page(sg); - unsigned long remainder = vma->vm_end - addr; - unsigned long len = sg_dma_len(sg); - - if (offset >= sg_dma_len(sg)) { - offset -= sg_dma_len(sg); - continue; - } else if (offset) { - page += offset / PAGE_SIZE; - len = sg_dma_len(sg) - offset; - offset = 0; - } - len = min(len, remainder); - remap_pfn_range(vma, addr, page_to_pfn(page), len, - vma->vm_page_prot); - addr += len; - if (addr >= vma->vm_end) - return 0; - } - return 0; -} - static struct ion_heap_ops system_heap_ops = { .allocate = ion_system_heap_allocate, .free = ion_system_heap_free, .map_dma = ion_system_heap_map_dma, .unmap_dma = ion_system_heap_unmap_dma, - .map_kernel = ion_system_heap_map_kernel, - .unmap_kernel = ion_system_heap_unmap_kernel, - .map_user = ion_system_heap_map_user, + .map_kernel = ion_heap_map_kernel, + .unmap_kernel = ion_heap_unmap_kernel, + .map_user = ion_heap_map_user, }; static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s, @@ -468,8 +396,8 @@ static struct ion_heap_ops kmalloc_ops = { .phys = ion_system_contig_heap_phys, .map_dma = ion_system_contig_heap_map_dma, .unmap_dma = ion_system_contig_heap_unmap_dma, - .map_kernel = ion_system_heap_map_kernel, - .unmap_kernel = ion_system_heap_unmap_kernel, + .map_kernel = ion_heap_map_kernel, + .unmap_kernel = ion_heap_unmap_kernel, .map_user = ion_system_contig_heap_map_user, };