diff options
Diffstat (limited to 'drivers/gpu/drm/exynos_tmp/exynos_drm_buf.c')
| -rw-r--r-- | drivers/gpu/drm/exynos_tmp/exynos_drm_buf.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/drivers/gpu/drm/exynos_tmp/exynos_drm_buf.c b/drivers/gpu/drm/exynos_tmp/exynos_drm_buf.c deleted file mode 100644 index f7bb7be..0000000 --- a/drivers/gpu/drm/exynos_tmp/exynos_drm_buf.c +++ /dev/null @@ -1,241 +0,0 @@ -/* exynos_drm_buf.c - * - * Copyright (c) 2011 Samsung Electronics Co., Ltd. - * Author: Inki Dae <inki.dae@samsung.com> - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "drmP.h" -#include "drm.h" -#include "exynos_drm.h" - -#include <linux/cma.h> -#include "exynos_drm_drv.h" -#include "exynos_drm_gem.h" -#include "exynos_drm_buf.h" - -static int lowlevel_buffer_allocate(struct drm_device *dev, - unsigned int flags, struct exynos_drm_gem_buf *buf) -{ - dma_addr_t start_addr; - unsigned int npages, i = 0; - struct scatterlist *sgl; - int ret = 0; - - DRM_DEBUG_KMS("%s\n", __FILE__); - - if (IS_NONCONTIG_BUFFER(flags)) { - DRM_DEBUG_KMS("not support allocation type.\n"); - return -EINVAL; - } - - if (buf->dma_addr) { - DRM_DEBUG_KMS("already allocated.\n"); - return 0; - } - - if (buf->size >= SZ_1M) { - npages = buf->size >> SECTION_SHIFT; - buf->page_size = SECTION_SIZE; - } else if (buf->size >= SZ_64K) { - npages = buf->size >> 16; - buf->page_size = SZ_64K; - } else { - npages = buf->size >> PAGE_SHIFT; - buf->page_size = PAGE_SIZE; - } - - buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); - if (!buf->sgt) { - DRM_ERROR("failed to allocate sg table.\n"); - return -ENOMEM; - } - - ret = sg_alloc_table(buf->sgt, npages, GFP_KERNEL); - if (ret < 0) { - DRM_ERROR("failed to initialize sg table.\n"); - kfree(buf->sgt); - buf->sgt = NULL; - return -ENOMEM; - } - -#ifdef CONFIG_CMA - buf->dma_addr = cma_alloc(dev->dev, "drm", buf->size, - buf->page_size); - if (IS_ERR((void *)buf->dma_addr)) { - DRM_DEBUG_KMS("cma_alloc of size %ld failed\n", - buf->size); - ret = -ENOMEM; - goto err1; - } - - buf->kvaddr = phys_to_virt(buf->dma_addr); -#else - /* align it as page size(page or section) TODO */ - - buf->kvaddr = dma_alloc_writecombine(dev->dev, buf->size, - &buf->dma_addr, GFP_KERNEL); - if (!buf->kvaddr) { - DRM_ERROR("failed to allocate buffer.\n"); - ret = -ENOMEM; - goto err1; - } -#endif - buf->pages = kzalloc(sizeof(struct page) * npages, GFP_KERNEL); - if (!buf->pages) { - DRM_ERROR("failed to allocate pages.\n"); - ret = -ENOMEM; - goto err2; - } - - sgl = buf->sgt->sgl; - start_addr = buf->dma_addr; - - while (i < npages) { - buf->pages[i] = phys_to_page(start_addr); - sg_set_page(sgl, buf->pages[i], buf->page_size, 0); - sg_dma_address(sgl) = start_addr; - start_addr += buf->page_size; - sgl = sg_next(sgl); - i++; - } - - DRM_INFO("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n", - (unsigned long)buf->kvaddr, - (unsigned long)buf->dma_addr, - buf->size); - - return ret; -err2: -#ifdef CONFIG_CMA - cma_free(buf->dma_addr); -#else - dma_free_writecombine(dev->dev, buf->size, buf->kvaddr, - (dma_addr_t)buf->dma_addr); -#endif - buf->dma_addr = (dma_addr_t)NULL; -err1: - sg_free_table(buf->sgt); - kfree(buf->sgt); - buf->sgt = NULL; - - return ret; -} - -static void lowlevel_buffer_deallocate(struct drm_device *dev, - unsigned int flags, struct exynos_drm_gem_buf *buf) -{ - DRM_DEBUG_KMS("%s.\n", __FILE__); - - /* - * now buffer is being shared and it would be released - * by original owner so ignor free action. - */ - if (buf->shared || atomic_read(&buf->shared_refcount)) - return; - - /* - * release only physically continuous memory and - * non-continuous memory would be released by exynos - * gem framework. - */ - if (IS_NONCONTIG_BUFFER(flags)) { - DRM_DEBUG_KMS("not support allocation type.\n"); - return; - } - - if (!buf->dma_addr) { - DRM_DEBUG_KMS("dma_addr is invalid.\n"); - return; - } - - sg_free_table(buf->sgt); - - kfree(buf->sgt); - buf->sgt = NULL; - - kfree(buf->pages); - buf->pages = NULL; -#ifdef CONFIG_CMA - cma_free(buf->dma_addr); -#else - dma_free_writecombine(dev->dev, buf->size, buf->kvaddr, - (dma_addr_t)buf->dma_addr); -#endif - buf->dma_addr = (dma_addr_t)NULL; -} - -struct exynos_drm_gem_buf *exynos_drm_init_buf(struct drm_device *dev, - unsigned int size) -{ - struct exynos_drm_gem_buf *buffer; - - DRM_DEBUG_KMS("%s.\n", __FILE__); - DRM_DEBUG_KMS("desired size = 0x%x\n", size); - - buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); - if (!buffer) { - DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n"); - return NULL; - } - - buffer->size = size; - return buffer; -} - -void exynos_drm_fini_buf(struct drm_device *dev, - struct exynos_drm_gem_buf *buffer) -{ - DRM_DEBUG_KMS("%s.\n", __FILE__); - - if (!buffer) { - DRM_DEBUG_KMS("buffer is null.\n"); - return; - } - - kfree(buffer); - buffer = NULL; -} - -int exynos_drm_alloc_buf(struct drm_device *dev, - struct exynos_drm_gem_buf *buf, unsigned int flags) -{ - - /* - * allocate memory region and set the memory information - * to vaddr and dma_addr of a buffer object. - */ - if (lowlevel_buffer_allocate(dev, flags, buf) < 0) - return -ENOMEM; - - return 0; -} - -void exynos_drm_free_buf(struct drm_device *dev, - unsigned int flags, struct exynos_drm_gem_buf *buffer) -{ - - lowlevel_buffer_deallocate(dev, flags, buffer); -} - -MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); -MODULE_DESCRIPTION("Samsung SoC DRM Buffer Management Module"); -MODULE_LICENSE("GPL"); |