/*
|
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
|
* Author:Mark Yao <mark.yao@rock-chips.com>
|
*
|
* This software is licensed under the terms of the GNU General Public
|
* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
|
* This program is distributed in the hope that it will be useful,
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
* GNU General Public License for more details.
|
*/
|
|
#include <drm/drm.h>
|
#include <drm/drmP.h>
|
#include <drm/drm_gem.h>
|
#include <drm/drm_vma_manager.h>
|
|
#include <linux/dma-buf.h>
|
#include <linux/genalloc.h>
|
#include <linux/iommu.h>
|
#include <linux/pagemap.h>
|
#include <linux/vmalloc.h>
|
#include <linux/swiotlb.h>
|
|
#include "rockchip_drm_drv.h"
|
#include "rockchip_drm_gem.h"
|
|
struct page_info {
|
struct page *page;
|
struct list_head list;
|
};
|
|
#define PG_ROUND 8
|
|
static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_device *drm = rk_obj->base.dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
int prot = IOMMU_READ | IOMMU_WRITE | IOMMU_TLB_SHOT_ENTIRE;
|
ssize_t ret;
|
|
mutex_lock(&private->mm_lock);
|
ret = drm_mm_insert_node_generic(&private->mm, &rk_obj->mm,
|
rk_obj->base.size, PAGE_SIZE,
|
0, 0);
|
mutex_unlock(&private->mm_lock);
|
|
if (ret < 0) {
|
DRM_ERROR("out of I/O virtual memory: %zd\n", ret);
|
return ret;
|
}
|
|
rk_obj->dma_addr = rk_obj->mm.start;
|
|
ret = iommu_map_sg(private->domain, rk_obj->dma_addr, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents, prot);
|
if (ret < rk_obj->base.size) {
|
DRM_ERROR("failed to map buffer: size=%zd request_size=%zd\n",
|
ret, rk_obj->base.size);
|
ret = -ENOMEM;
|
goto err_remove_node;
|
}
|
|
rk_obj->size = ret;
|
|
return 0;
|
|
err_remove_node:
|
mutex_lock(&private->mm_lock);
|
drm_mm_remove_node(&rk_obj->mm);
|
mutex_unlock(&private->mm_lock);
|
|
return ret;
|
}
|
|
static int rockchip_gem_iommu_unmap(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_device *drm = rk_obj->base.dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
|
iommu_unmap(private->domain, rk_obj->dma_addr, rk_obj->size);
|
|
mutex_lock(&private->mm_lock);
|
|
drm_mm_remove_node(&rk_obj->mm);
|
|
mutex_unlock(&private->mm_lock);
|
|
return 0;
|
}
|
|
static void rockchip_gem_free_list(struct list_head lists[])
|
{
|
struct page_info *info, *tmp_info;
|
int i;
|
|
for (i = 0; i < PG_ROUND; i++) {
|
list_for_each_entry_safe(info, tmp_info, &lists[i], list) {
|
list_del(&info->list);
|
kfree(info);
|
}
|
}
|
}
|
|
static struct sg_table *rockchip_gem_pages_to_sg(struct page **pages, unsigned int nr_pages)
|
{
|
struct sg_table *sg = NULL;
|
int ret;
|
#define SG_SIZE_MAX (IO_TLB_SEGSIZE * (1 << IO_TLB_SHIFT))
|
|
sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
|
if (!sg) {
|
ret = -ENOMEM;
|
goto out;
|
}
|
|
ret = __sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
|
nr_pages << PAGE_SHIFT,
|
SG_SIZE_MAX, GFP_KERNEL);
|
if (ret)
|
goto out;
|
|
return sg;
|
out:
|
kfree(sg);
|
return ERR_PTR(ret);
|
}
|
|
static struct page **get_pages(struct drm_gem_object *obj)
|
{
|
if (IS_ENABLED(CONFIG_DMABUF_PAGE_POOL)) {
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *priv = drm->dev_private;
|
struct dmabuf_page_pool *pool = priv->page_pools;
|
|
return dmabuf_page_pool_alloc_pages_array(pool,
|
obj->size >>
|
PAGE_SHIFT);
|
}
|
|
return drm_gem_get_pages(obj);
|
}
|
|
static void put_pages(struct drm_gem_object *obj, struct page **pages,
|
bool dirty, bool accessed)
|
{
|
if (IS_ENABLED(CONFIG_DMABUF_PAGE_POOL)) {
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *priv = drm->dev_private;
|
struct dmabuf_page_pool *pool = priv->page_pools;
|
|
return dmabuf_page_pool_free_pages_array(pool, pages,
|
obj->size >>
|
PAGE_SHIFT);
|
}
|
|
return drm_gem_put_pages(obj, pages, dirty, accessed);
|
}
|
|
static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_device *drm = rk_obj->base.dev;
|
int ret, i;
|
struct scatterlist *s;
|
unsigned int cur_page;
|
struct page **pages, **dst_pages;
|
int j;
|
int n_pages;
|
unsigned long chunk_pages;
|
unsigned long remain;
|
struct list_head lists[PG_ROUND];
|
dma_addr_t phys;
|
int end = 0;
|
unsigned int bit12_14;
|
unsigned int block_index[PG_ROUND] = {0};
|
struct page_info *info;
|
unsigned int maximum;
|
|
for (i = 0; i < PG_ROUND; i++)
|
INIT_LIST_HEAD(&lists[i]);
|
|
pages = get_pages(&rk_obj->base);
|
if (IS_ERR(pages))
|
return PTR_ERR(pages);
|
|
rk_obj->pages = pages;
|
|
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
|
|
n_pages = rk_obj->num_pages;
|
|
dst_pages = __vmalloc(sizeof(struct page *) * n_pages,
|
GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
|
if (!dst_pages) {
|
ret = -ENOMEM;
|
goto err_put_pages;
|
}
|
|
cur_page = 0;
|
remain = n_pages;
|
/* look for the end of the current chunk */
|
while (remain) {
|
for (j = cur_page + 1; j < n_pages; ++j) {
|
if (page_to_pfn(pages[j]) !=
|
page_to_pfn(pages[j - 1]) + 1)
|
break;
|
}
|
|
chunk_pages = j - cur_page;
|
if (chunk_pages > 7) {
|
for (i = 0; i < chunk_pages; i++)
|
dst_pages[end + i] = pages[cur_page + i];
|
end += chunk_pages;
|
} else {
|
for (i = 0; i < chunk_pages; i++) {
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
if (!info) {
|
ret = -ENOMEM;
|
goto err_put_list;
|
}
|
|
INIT_LIST_HEAD(&info->list);
|
info->page = pages[cur_page + i];
|
phys = page_to_phys(info->page);
|
bit12_14 = (phys >> 12) & 0x7;
|
list_add_tail(&info->list, &lists[bit12_14]);
|
block_index[bit12_14]++;
|
}
|
}
|
|
cur_page = j;
|
remain -= chunk_pages;
|
}
|
|
maximum = block_index[0];
|
for (i = 1; i < PG_ROUND; i++)
|
maximum = max(maximum, block_index[i]);
|
|
for (i = 0; i < maximum; i++) {
|
for (j = 0; j < PG_ROUND; j++) {
|
if (!list_empty(&lists[j])) {
|
struct page_info *info;
|
|
info = list_first_entry(&lists[j],
|
struct page_info, list);
|
dst_pages[end++] = info->page;
|
list_del(&info->list);
|
kfree(info);
|
}
|
}
|
}
|
|
DRM_DEBUG_KMS("%s, %d, end = %d, n_pages = %d\n", __func__, __LINE__,
|
end, n_pages);
|
|
rk_obj->sgt = rockchip_gem_pages_to_sg(dst_pages, rk_obj->num_pages);
|
|
if (IS_ERR(rk_obj->sgt)) {
|
ret = PTR_ERR(rk_obj->sgt);
|
goto err_put_list;
|
}
|
|
rk_obj->pages = dst_pages;
|
|
/*
|
* Fake up the SG table so that dma_sync_sg_for_device() can be used
|
* to flush the pages associated with it.
|
*
|
* TODO: Replace this by drm_clflush_sg() once it can be implemented
|
* without relying on symbols that are not exported.
|
*/
|
for_each_sg(rk_obj->sgt->sgl, s, rk_obj->sgt->nents, i)
|
sg_dma_address(s) = sg_phys(s);
|
|
dma_sync_sg_for_device(drm->dev, rk_obj->sgt->sgl, rk_obj->sgt->nents,
|
DMA_TO_DEVICE);
|
|
kvfree(pages);
|
|
return 0;
|
|
err_put_list:
|
rockchip_gem_free_list(lists);
|
kvfree(dst_pages);
|
err_put_pages:
|
put_pages(&rk_obj->base, rk_obj->pages, false, false);
|
rk_obj->pages = NULL;
|
return ret;
|
}
|
|
static void rockchip_gem_put_pages(struct rockchip_gem_object *rk_obj)
|
{
|
sg_free_table(rk_obj->sgt);
|
kfree(rk_obj->sgt);
|
rk_obj->sgt = NULL;
|
put_pages(&rk_obj->base, rk_obj->pages, true, true);
|
rk_obj->pages = NULL;
|
}
|
|
static inline void *drm_calloc_large(size_t nmemb, size_t size);
|
static inline void drm_free_large(void *ptr);
|
static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj);
|
static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj,
|
bool alloc_kmap)
|
{
|
struct drm_gem_object *obj = &rk_obj->base;
|
struct drm_device *drm = obj->dev;
|
struct sg_table *sgt;
|
int ret, i;
|
struct scatterlist *s;
|
|
rk_obj->dma_attrs = DMA_ATTR_WRITE_COMBINE;
|
|
if (!alloc_kmap)
|
rk_obj->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
|
|
rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
|
&rk_obj->dma_handle, GFP_KERNEL,
|
rk_obj->dma_attrs);
|
if (!rk_obj->kvaddr) {
|
DRM_ERROR("failed to allocate %zu byte dma buffer", obj->size);
|
return -ENOMEM;
|
}
|
|
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
|
if (!sgt) {
|
ret = -ENOMEM;
|
goto err_dma_free;
|
}
|
|
ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
|
rk_obj->dma_handle, obj->size,
|
rk_obj->dma_attrs);
|
if (ret) {
|
DRM_ERROR("failed to allocate sgt, %d\n", ret);
|
goto err_sgt_free;
|
}
|
|
for_each_sg(sgt->sgl, s, sgt->nents, i)
|
sg_dma_address(s) = sg_phys(s);
|
|
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
|
|
rk_obj->pages = drm_calloc_large(rk_obj->num_pages,
|
sizeof(*rk_obj->pages));
|
if (!rk_obj->pages) {
|
DRM_ERROR("failed to allocate pages.\n");
|
goto err_sg_table_free;
|
}
|
|
if (drm_prime_sg_to_page_addr_arrays(sgt, rk_obj->pages, NULL,
|
rk_obj->num_pages)) {
|
DRM_ERROR("invalid sgtable.\n");
|
ret = -EINVAL;
|
goto err_page_free;
|
}
|
|
rk_obj->sgt = sgt;
|
|
return 0;
|
|
err_page_free:
|
drm_free_large(rk_obj->pages);
|
err_sg_table_free:
|
sg_free_table(sgt);
|
err_sgt_free:
|
kfree(sgt);
|
err_dma_free:
|
dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr,
|
rk_obj->dma_handle, rk_obj->dma_attrs);
|
|
return ret;
|
}
|
|
static inline void *drm_calloc_large(size_t nmemb, size_t size)
|
{
|
if (size != 0 && nmemb > SIZE_MAX / size)
|
return NULL;
|
|
if (size * nmemb <= PAGE_SIZE)
|
return kcalloc(nmemb, size, GFP_KERNEL);
|
|
return __vmalloc(size * nmemb,
|
GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
|
}
|
|
static inline void drm_free_large(void *ptr)
|
{
|
kvfree(ptr);
|
}
|
|
static int rockchip_gem_alloc_secure(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_gem_object *obj = &rk_obj->base;
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
unsigned long paddr;
|
struct sg_table *sgt;
|
int ret = 0, i;
|
|
if (!private->secure_buffer_pool) {
|
DRM_ERROR("No secure buffer pool found\n");
|
return -ENOMEM;
|
}
|
|
paddr = gen_pool_alloc(private->secure_buffer_pool, rk_obj->base.size);
|
if (!paddr) {
|
DRM_ERROR("failed to allocate secure buffer\n");
|
return -ENOMEM;
|
}
|
|
rk_obj->dma_handle = paddr;
|
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
|
|
rk_obj->pages = drm_calloc_large(rk_obj->num_pages,
|
sizeof(*rk_obj->pages));
|
if (!rk_obj->pages) {
|
DRM_ERROR("failed to allocate pages.\n");
|
ret = -ENOMEM;
|
goto err_buf_free;
|
}
|
|
i = 0;
|
while (i < rk_obj->num_pages) {
|
rk_obj->pages[i] = phys_to_page(paddr);
|
paddr += PAGE_SIZE;
|
i++;
|
}
|
sgt = rockchip_gem_pages_to_sg(rk_obj->pages, rk_obj->num_pages);
|
if (IS_ERR(sgt)) {
|
ret = PTR_ERR(sgt);
|
goto err_free_pages;
|
}
|
|
rk_obj->sgt = sgt;
|
|
return 0;
|
|
err_free_pages:
|
drm_free_large(rk_obj->pages);
|
err_buf_free:
|
gen_pool_free(private->secure_buffer_pool, paddr, rk_obj->base.size);
|
|
return ret;
|
}
|
|
static void rockchip_gem_free_secure(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_gem_object *obj = &rk_obj->base;
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
|
drm_free_large(rk_obj->pages);
|
sg_free_table(rk_obj->sgt);
|
kfree(rk_obj->sgt);
|
gen_pool_free(private->secure_buffer_pool, rk_obj->dma_handle,
|
rk_obj->base.size);
|
}
|
|
static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
|
bool alloc_kmap)
|
{
|
struct drm_gem_object *obj = &rk_obj->base;
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
int ret = 0;
|
|
if (!private->domain)
|
rk_obj->flags |= ROCKCHIP_BO_CONTIG;
|
|
if (rk_obj->flags & ROCKCHIP_BO_SECURE) {
|
rk_obj->buf_type = ROCKCHIP_GEM_BUF_TYPE_SECURE;
|
rk_obj->flags |= ROCKCHIP_BO_CONTIG;
|
if (alloc_kmap) {
|
DRM_ERROR("Not allow alloc secure buffer with kmap\n");
|
return -EINVAL;
|
}
|
ret = rockchip_gem_alloc_secure(rk_obj);
|
if (ret)
|
return ret;
|
} else if (rk_obj->flags & ROCKCHIP_BO_CONTIG) {
|
rk_obj->buf_type = ROCKCHIP_GEM_BUF_TYPE_CMA;
|
ret = rockchip_gem_alloc_dma(rk_obj, alloc_kmap);
|
if (ret)
|
return ret;
|
} else {
|
rk_obj->buf_type = ROCKCHIP_GEM_BUF_TYPE_SHMEM;
|
ret = rockchip_gem_get_pages(rk_obj);
|
if (ret < 0)
|
return ret;
|
|
if (alloc_kmap) {
|
rk_obj->kvaddr = vmap(rk_obj->pages, rk_obj->num_pages,
|
VM_MAP,
|
pgprot_writecombine(PAGE_KERNEL));
|
if (!rk_obj->kvaddr) {
|
DRM_ERROR("failed to vmap() buffer\n");
|
ret = -ENOMEM;
|
goto err_iommu_free;
|
}
|
}
|
}
|
|
if (private->domain) {
|
ret = rockchip_gem_iommu_map(rk_obj);
|
if (ret < 0)
|
goto err_free;
|
} else {
|
WARN_ON(!rk_obj->dma_handle);
|
rk_obj->dma_addr = rk_obj->dma_handle;
|
}
|
|
return 0;
|
|
err_iommu_free:
|
if (private->domain)
|
rockchip_gem_iommu_unmap(rk_obj);
|
err_free:
|
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE)
|
rockchip_gem_free_secure(rk_obj);
|
else if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_CMA)
|
rockchip_gem_free_dma(rk_obj);
|
else
|
rockchip_gem_put_pages(rk_obj);
|
return ret;
|
}
|
|
static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_gem_object *obj = &rk_obj->base;
|
struct drm_device *drm = obj->dev;
|
|
drm_free_large(rk_obj->pages);
|
sg_free_table(rk_obj->sgt);
|
kfree(rk_obj->sgt);
|
dma_free_attrs(drm->dev, obj->size, rk_obj->kvaddr,
|
rk_obj->dma_handle, rk_obj->dma_attrs);
|
}
|
|
static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
|
{
|
struct drm_device *drm = rk_obj->base.dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
|
if (private->domain)
|
rockchip_gem_iommu_unmap(rk_obj);
|
|
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SHMEM) {
|
vunmap(rk_obj->kvaddr);
|
rockchip_gem_put_pages(rk_obj);
|
} else if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE) {
|
rockchip_gem_free_secure(rk_obj);
|
} else {
|
rockchip_gem_free_dma(rk_obj);
|
}
|
}
|
|
/*
|
* __vm_map_pages - maps range of kernel pages into user vma
|
* @vma: user vma to map to
|
* @pages: pointer to array of source kernel pages
|
* @num: number of pages in page array
|
* @offset: user's requested vm_pgoff
|
*
|
* This allows drivers to map range of kernel pages into a user vma.
|
*
|
* Return: 0 on success and error code otherwise.
|
*/
|
static int __vm_map_pages(struct vm_area_struct *vma, struct page **pages,
|
unsigned long num, unsigned long offset)
|
{
|
unsigned long count = vma_pages(vma);
|
unsigned long uaddr = vma->vm_start;
|
int ret, i;
|
|
/* Fail if the user requested offset is beyond the end of the object */
|
if (offset > num)
|
return -ENXIO;
|
|
/* Fail if the user requested size exceeds available object size */
|
if (count > num - offset)
|
return -ENXIO;
|
|
for (i = 0; i < count; i++) {
|
ret = vm_insert_page(vma, uaddr, pages[offset + i]);
|
if (ret < 0)
|
return ret;
|
uaddr += PAGE_SIZE;
|
}
|
|
return 0;
|
}
|
|
static int rockchip_drm_gem_object_mmap_iommu(struct drm_gem_object *obj,
|
struct vm_area_struct *vma)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
unsigned int count = obj->size >> PAGE_SHIFT;
|
unsigned long user_count = vma_pages(vma);
|
|
if (user_count == 0)
|
return -ENXIO;
|
|
return __vm_map_pages(vma, rk_obj->pages, count, vma->vm_pgoff);
|
}
|
|
static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj,
|
struct vm_area_struct *vma)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
|
return dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr,
|
obj->size, rk_obj->dma_attrs);
|
}
|
|
static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
|
struct vm_area_struct *vma)
|
{
|
int ret;
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
|
/* default is wc. */
|
if (rk_obj->flags & ROCKCHIP_BO_CACHABLE)
|
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
|
|
/*
|
* We allocated a struct page table for rk_obj, so clear
|
* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
|
*/
|
vma->vm_flags &= ~VM_PFNMAP;
|
|
if (rk_obj->buf_type == ROCKCHIP_GEM_BUF_TYPE_SECURE) {
|
DRM_ERROR("Disallow mmap for secure buffer\n");
|
ret = -EINVAL;
|
} else if (rk_obj->pages) {
|
ret = rockchip_drm_gem_object_mmap_iommu(obj, vma);
|
} else {
|
ret = rockchip_drm_gem_object_mmap_dma(obj, vma);
|
}
|
|
if (ret)
|
drm_gem_vm_close(vma);
|
|
return ret;
|
}
|
|
int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
|
struct vm_area_struct *vma)
|
{
|
int ret;
|
|
ret = drm_gem_mmap_obj(obj, obj->size, vma);
|
if (ret)
|
return ret;
|
|
return rockchip_drm_gem_object_mmap(obj, vma);
|
}
|
|
/* drm driver mmap file operations */
|
int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
|
{
|
struct drm_gem_object *obj;
|
int ret;
|
|
ret = drm_gem_mmap(filp, vma);
|
if (ret)
|
return ret;
|
|
/*
|
* Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
|
* whole buffer from the start.
|
*/
|
vma->vm_pgoff = 0;
|
|
obj = vma->vm_private_data;
|
|
return rockchip_drm_gem_object_mmap(obj, vma);
|
}
|
|
static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
|
{
|
drm_gem_object_release(&rk_obj->base);
|
kfree(rk_obj);
|
}
|
|
static struct rockchip_gem_object *
|
rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
|
{
|
struct address_space *mapping;
|
struct rockchip_gem_object *rk_obj;
|
struct drm_gem_object *obj;
|
|
#ifdef CONFIG_ARM_LPAE
|
gfp_t gfp_mask = GFP_HIGHUSER | __GFP_RECLAIMABLE | __GFP_DMA32;
|
#else
|
gfp_t gfp_mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
|
#endif
|
size = round_up(size, PAGE_SIZE);
|
|
rk_obj = kzalloc(sizeof(*rk_obj), GFP_KERNEL);
|
if (!rk_obj)
|
return ERR_PTR(-ENOMEM);
|
|
obj = &rk_obj->base;
|
|
drm_gem_object_init(drm, obj, size);
|
|
mapping = file_inode(obj->filp)->i_mapping;
|
mapping_set_gfp_mask(mapping, gfp_mask);
|
|
return rk_obj;
|
}
|
|
struct rockchip_gem_object *
|
rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
|
bool alloc_kmap, unsigned int flags)
|
{
|
struct rockchip_gem_object *rk_obj;
|
int ret;
|
|
rk_obj = rockchip_gem_alloc_object(drm, size);
|
if (IS_ERR(rk_obj))
|
return rk_obj;
|
rk_obj->flags = flags;
|
|
ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap);
|
if (ret)
|
goto err_free_rk_obj;
|
|
return rk_obj;
|
|
err_free_rk_obj:
|
rockchip_gem_release_object(rk_obj);
|
return ERR_PTR(ret);
|
}
|
|
/*
|
* rockchip_gem_free_object - (struct drm_driver)->gem_free_object_unlocked
|
* callback function
|
*/
|
void rockchip_gem_free_object(struct drm_gem_object *obj)
|
{
|
struct drm_device *drm = obj->dev;
|
struct rockchip_drm_private *private = drm->dev_private;
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
|
if (obj->import_attach) {
|
if (private->domain) {
|
rockchip_gem_iommu_unmap(rk_obj);
|
} else {
|
dma_unmap_sg(drm->dev, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents, DMA_BIDIRECTIONAL);
|
}
|
drm_free_large(rk_obj->pages);
|
#ifndef CONFIG_ARCH_ROCKCHIP
|
drm_prime_gem_destroy(obj, rk_obj->sgt);
|
#endif
|
} else {
|
rockchip_gem_free_buf(rk_obj);
|
}
|
|
rockchip_gem_release_object(rk_obj);
|
}
|
|
/*
|
* rockchip_gem_create_with_handle - allocate an object with the given
|
* size and create a gem handle on it
|
*
|
* returns a struct rockchip_gem_object* on success or ERR_PTR values
|
* on failure.
|
*/
|
static struct rockchip_gem_object *
|
rockchip_gem_create_with_handle(struct drm_file *file_priv,
|
struct drm_device *drm, unsigned int size,
|
unsigned int *handle, unsigned int flags)
|
{
|
struct rockchip_gem_object *rk_obj;
|
struct drm_gem_object *obj;
|
int ret;
|
bool alloc_kmap = flags & ROCKCHIP_BO_ALLOC_KMAP ? true : false;
|
|
rk_obj = rockchip_gem_create_object(drm, size, alloc_kmap, flags);
|
if (IS_ERR(rk_obj))
|
return ERR_CAST(rk_obj);
|
|
obj = &rk_obj->base;
|
|
/*
|
* allocate a id of idr table where the obj is registered
|
* and handle has the id what user can see.
|
*/
|
ret = drm_gem_handle_create(file_priv, obj, handle);
|
if (ret)
|
goto err_handle_create;
|
|
/* drop reference from allocate - handle holds it now. */
|
drm_gem_object_put_unlocked(obj);
|
|
return rk_obj;
|
|
err_handle_create:
|
rockchip_gem_free_object(obj);
|
|
return ERR_PTR(ret);
|
}
|
|
/*
|
* rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback
|
* function
|
*
|
* This aligns the pitch and size arguments to the minimum required. wrap
|
* this into your own function if you need bigger alignment.
|
*/
|
int rockchip_gem_dumb_create(struct drm_file *file_priv,
|
struct drm_device *dev,
|
struct drm_mode_create_dumb *args)
|
{
|
struct rockchip_gem_object *rk_obj;
|
int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
|
|
/*
|
* align to 64 bytes since Mali requires it.
|
*/
|
args->pitch = ALIGN(min_pitch, 64);
|
args->size = args->pitch * args->height;
|
|
rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
|
&args->handle, args->flags);
|
|
return PTR_ERR_OR_ZERO(rk_obj);
|
}
|
|
/*
|
* Allocate a sg_table for this GEM object.
|
* Note: Both the table's contents, and the sg_table itself must be freed by
|
* the caller.
|
* Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
|
*/
|
struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
struct sg_table *sgt;
|
int ret;
|
|
if (rk_obj->pages)
|
return rockchip_gem_pages_to_sg(rk_obj->pages, rk_obj->num_pages);
|
|
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
|
if (!sgt)
|
return ERR_PTR(-ENOMEM);
|
|
ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
|
rk_obj->dma_addr, obj->size,
|
rk_obj->dma_attrs);
|
if (ret) {
|
DRM_ERROR("failed to allocate sgt, %d\n", ret);
|
kfree(sgt);
|
return ERR_PTR(ret);
|
}
|
|
return sgt;
|
}
|
|
static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt,
|
int count)
|
{
|
struct scatterlist *s;
|
dma_addr_t expected = sg_dma_address(sgt->sgl);
|
unsigned int i;
|
unsigned long size = 0;
|
|
for_each_sg(sgt->sgl, s, count, i) {
|
if (sg_dma_address(s) != expected)
|
break;
|
expected = sg_dma_address(s) + sg_dma_len(s);
|
size += sg_dma_len(s);
|
}
|
return size;
|
}
|
|
static int
|
rockchip_gem_iommu_map_sg(struct drm_device *drm,
|
struct dma_buf_attachment *attach,
|
struct sg_table *sg,
|
struct rockchip_gem_object *rk_obj)
|
{
|
rk_obj->sgt = sg;
|
return rockchip_gem_iommu_map(rk_obj);
|
}
|
|
static int
|
rockchip_gem_dma_map_sg(struct drm_device *drm,
|
struct dma_buf_attachment *attach,
|
struct sg_table *sg,
|
struct rockchip_gem_object *rk_obj)
|
{
|
int count = dma_map_sg(drm->dev, sg->sgl, sg->nents,
|
DMA_BIDIRECTIONAL);
|
if (!count)
|
return -EINVAL;
|
|
if (rockchip_sg_get_contiguous_size(sg, count) < attach->dmabuf->size) {
|
DRM_ERROR("failed to map sg_table to contiguous linear address.\n");
|
dma_unmap_sg(drm->dev, sg->sgl, sg->nents,
|
DMA_BIDIRECTIONAL);
|
return -EINVAL;
|
}
|
|
rk_obj->dma_addr = sg_dma_address(sg->sgl);
|
rk_obj->sgt = sg;
|
return 0;
|
}
|
|
struct drm_gem_object *
|
rockchip_gem_prime_import_sg_table(struct drm_device *drm,
|
struct dma_buf_attachment *attach,
|
struct sg_table *sg)
|
{
|
struct rockchip_drm_private *private = drm->dev_private;
|
struct rockchip_gem_object *rk_obj;
|
int ret;
|
|
rk_obj = rockchip_gem_alloc_object(drm, attach->dmabuf->size);
|
if (IS_ERR(rk_obj))
|
return ERR_CAST(rk_obj);
|
|
if (private->domain)
|
ret = rockchip_gem_iommu_map_sg(drm, attach, sg, rk_obj);
|
else
|
ret = rockchip_gem_dma_map_sg(drm, attach, sg, rk_obj);
|
|
if (ret < 0) {
|
DRM_ERROR("failed to import sg table: %d\n", ret);
|
goto err_free_rk_obj;
|
}
|
|
rk_obj->num_pages = rk_obj->base.size >> PAGE_SHIFT;
|
rk_obj->pages = drm_calloc_large(rk_obj->num_pages, sizeof(*rk_obj->pages));
|
if (!rk_obj->pages) {
|
DRM_ERROR("failed to allocate pages.\n");
|
ret = -ENOMEM;
|
goto err_free_rk_obj;
|
}
|
|
ret = drm_prime_sg_to_page_addr_arrays(sg, rk_obj->pages, NULL, rk_obj->num_pages);
|
if (ret < 0) {
|
DRM_ERROR("invalid sgtable.\n");
|
drm_free_large(rk_obj->pages);
|
goto err_free_rk_obj;
|
}
|
|
return &rk_obj->base;
|
|
err_free_rk_obj:
|
rockchip_gem_release_object(rk_obj);
|
return ERR_PTR(ret);
|
}
|
|
void *rockchip_gem_prime_vmap(struct drm_gem_object *obj)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
|
if (rk_obj->pages) {
|
pgprot_t prot;
|
|
prot = rk_obj->flags & ROCKCHIP_BO_CACHABLE ? PAGE_KERNEL : pgprot_writecombine(PAGE_KERNEL);
|
|
return vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, prot);
|
}
|
|
if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING)
|
return NULL;
|
|
return rk_obj->kvaddr;
|
}
|
|
void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
|
if (rk_obj->pages) {
|
vunmap(vaddr);
|
return;
|
}
|
|
/* Nothing to do if allocated by DMA mapping API. */
|
}
|
|
int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
|
struct drm_device *dev, uint32_t handle,
|
uint64_t *offset)
|
{
|
struct drm_gem_object *obj;
|
int ret = 0;
|
|
obj = drm_gem_object_lookup(file_priv, handle);
|
if (!obj) {
|
DRM_ERROR("failed to lookup gem object.\n");
|
return -EINVAL;
|
}
|
|
ret = drm_gem_create_mmap_offset(obj);
|
if (ret)
|
goto out;
|
|
*offset = drm_vma_node_offset_addr(&obj->vma_node);
|
DRM_DEBUG_KMS("offset = 0x%llx\n", *offset);
|
|
out:
|
drm_gem_object_unreference_unlocked(obj);
|
|
return ret;
|
}
|
|
int rockchip_gem_create_ioctl(struct drm_device *dev, void *data,
|
struct drm_file *file_priv)
|
{
|
struct drm_rockchip_gem_create *args = data;
|
struct rockchip_gem_object *rk_obj;
|
|
rk_obj = rockchip_gem_create_with_handle(file_priv, dev, args->size,
|
&args->handle, args->flags);
|
return PTR_ERR_OR_ZERO(rk_obj);
|
}
|
|
int rockchip_gem_map_offset_ioctl(struct drm_device *drm, void *data,
|
struct drm_file *file_priv)
|
{
|
struct drm_rockchip_gem_map_off *args = data;
|
|
return rockchip_gem_dumb_map_offset(file_priv, drm, args->handle,
|
&args->offset);
|
}
|
|
int rockchip_gem_get_phys_ioctl(struct drm_device *dev, void *data,
|
struct drm_file *file_priv)
|
{
|
struct drm_rockchip_gem_phys *args = data;
|
struct rockchip_gem_object *rk_obj;
|
struct drm_gem_object *obj;
|
int ret = 0;
|
|
obj = drm_gem_object_lookup(file_priv, args->handle);
|
if (!obj) {
|
DRM_ERROR("failed to lookup gem object.\n");
|
return -EINVAL;
|
}
|
rk_obj = to_rockchip_obj(obj);
|
|
if (!(rk_obj->flags & ROCKCHIP_BO_CONTIG)) {
|
DRM_ERROR("Can't get phys address from non-continue buf.\n");
|
ret = -EINVAL;
|
goto out;
|
}
|
|
args->phy_addr = page_to_phys(rk_obj->pages[0]);
|
|
out:
|
drm_gem_object_unreference_unlocked(obj);
|
return ret;
|
}
|
|
int rockchip_gem_prime_begin_cpu_access(struct drm_gem_object *obj,
|
enum dma_data_direction dir)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
|
if (!rk_obj->sgt)
|
return 0;
|
|
dma_sync_sg_for_cpu(drm->dev, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents, dir);
|
return 0;
|
}
|
|
int rockchip_gem_prime_end_cpu_access(struct drm_gem_object *obj,
|
enum dma_data_direction dir)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
|
if (!rk_obj->sgt)
|
return 0;
|
|
dma_sync_sg_for_device(drm->dev, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents, dir);
|
return 0;
|
}
|
|
static int rockchip_gem_prime_sgl_sync_range(struct device *dev,
|
struct scatterlist *sgl, unsigned int nents,
|
unsigned int offset, unsigned int length,
|
enum dma_data_direction dir, bool for_cpu)
|
{
|
int i;
|
struct scatterlist *sg;
|
unsigned int len = 0;
|
dma_addr_t sg_dma_addr;
|
|
for_each_sg(sgl, sg, nents, i) {
|
unsigned int sg_offset, sg_left, size = 0;
|
|
len += sg->length;
|
if (len <= offset)
|
continue;
|
|
sg_dma_addr = sg_dma_address(sg);
|
sg_left = len - offset;
|
sg_offset = sg->length - sg_left;
|
|
size = (length < sg_left) ? length : sg_left;
|
if (for_cpu)
|
dma_sync_single_range_for_cpu(dev, sg_dma_addr,
|
sg_offset, size, dir);
|
else
|
dma_sync_single_range_for_device(dev, sg_dma_addr,
|
sg_offset, size, dir);
|
|
offset += size;
|
length -= size;
|
|
if (length == 0)
|
break;
|
}
|
|
return 0;
|
}
|
|
int rockchip_gem_prime_begin_cpu_access_partial(struct drm_gem_object *obj,
|
enum dma_data_direction dir,
|
unsigned int offset,
|
unsigned int len)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
|
if (!rk_obj->sgt)
|
return 0;
|
|
rockchip_gem_prime_sgl_sync_range(drm->dev, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents,
|
offset, len, dir, true);
|
|
return 0;
|
}
|
|
int rockchip_gem_prime_end_cpu_access_partial(struct drm_gem_object *obj,
|
enum dma_data_direction dir,
|
unsigned int offset,
|
unsigned int len)
|
{
|
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
|
struct drm_device *drm = obj->dev;
|
|
if (!rk_obj->sgt)
|
return 0;
|
|
rockchip_gem_prime_sgl_sync_range(drm->dev, rk_obj->sgt->sgl,
|
rk_obj->sgt->nents,
|
offset, len, dir, false);
|
|
return 0;
|
}
|
