config DRM_EXYNOS_DP
bool "EXYNOS DRM DP driver support"
- depends on DRM_EXYNOS && (DRM_EXYNOS_FIMD || DRM_EXYNOS7_DECON) && (DRM_PTN3460=n || DRM_PTN3460=y || DRM_PTN3460=DRM_EXYNOS)
+ depends on DRM_EXYNOS && (DRM_EXYNOS_FIMD || DRM_EXYNOS7_DECON)
default DRM_EXYNOS
select DRM_PANEL
help
config DRM_EXYNOS_G2D
bool "Exynos DRM G2D"
depends on DRM_EXYNOS && !VIDEO_SAMSUNG_S5P_G2D
+ select FRAME_VECTOR
help
Choose this option if you want to use Exynos G2D for DRM.
/* registers for base address */
#define G2D_SRC_BASE_ADDR 0x0304
+#define G2D_SRC_STRIDE_REG 0x0308
#define G2D_SRC_COLOR_MODE 0x030C
#define G2D_SRC_LEFT_TOP 0x0310
#define G2D_SRC_RIGHT_BOTTOM 0x0314
#define G2D_SRC_PLANE2_BASE_ADDR 0x0318
#define G2D_DST_BASE_ADDR 0x0404
+#define G2D_DST_STRIDE_REG 0x0408
#define G2D_DST_COLOR_MODE 0x040C
#define G2D_DST_LEFT_TOP 0x0410
#define G2D_DST_RIGHT_BOTTOM 0x0414
* A structure of buffer description
*
* @format: color format
+ * @stride: buffer stride/pitch in bytes
* @left_x: the x coordinates of left top corner
* @top_y: the y coordinates of left top corner
* @right_x: the x coordinates of right bottom corner
*/
struct g2d_buf_desc {
unsigned int format;
+ unsigned int stride;
unsigned int left_x;
unsigned int top_y;
unsigned int right_x;
dma_addr_t dma_addr;
unsigned long userptr;
unsigned long size;
- struct page **pages;
- unsigned int npages;
+ struct frame_vector *vec;
struct sg_table *sgt;
- struct vm_area_struct *vma;
atomic_t refcount;
bool in_pool;
bool out_of_list;
{
struct g2d_cmdlist_userptr *g2d_userptr =
(struct g2d_cmdlist_userptr *)obj;
+ struct page **pages;
if (!obj)
return;
exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
DMA_BIDIRECTIONAL);
- exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
- g2d_userptr->npages,
- g2d_userptr->vma);
+ pages = frame_vector_pages(g2d_userptr->vec);
+ if (!IS_ERR(pages)) {
+ int i;
- exynos_gem_put_vma(g2d_userptr->vma);
+ for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++)
+ set_page_dirty_lock(pages[i]);
+ }
+ put_vaddr_frames(g2d_userptr->vec);
+ frame_vector_destroy(g2d_userptr->vec);
if (!g2d_userptr->out_of_list)
list_del_init(&g2d_userptr->list);
sg_free_table(g2d_userptr->sgt);
kfree(g2d_userptr->sgt);
-
- drm_free_large(g2d_userptr->pages);
kfree(g2d_userptr);
}
struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
struct g2d_cmdlist_userptr *g2d_userptr;
struct g2d_data *g2d;
- struct page **pages;
struct sg_table *sgt;
- struct vm_area_struct *vma;
unsigned long start, end;
unsigned int npages, offset;
int ret;
return ERR_PTR(-ENOMEM);
atomic_set(&g2d_userptr->refcount, 1);
+ g2d_userptr->size = size;
start = userptr & PAGE_MASK;
offset = userptr & ~PAGE_MASK;
end = PAGE_ALIGN(userptr + size);
npages = (end - start) >> PAGE_SHIFT;
- g2d_userptr->npages = npages;
-
- pages = drm_calloc_large(npages, sizeof(struct page *));
- if (!pages) {
- DRM_ERROR("failed to allocate pages.\n");
+ g2d_userptr->vec = frame_vector_create(npages);
+ if (!g2d_userptr->vec) {
ret = -ENOMEM;
goto err_free;
}
- down_read(¤t->mm->mmap_sem);
- vma = find_vma(current->mm, userptr);
- if (!vma) {
- up_read(¤t->mm->mmap_sem);
- DRM_ERROR("failed to get vm region.\n");
+ ret = get_vaddr_frames(start, npages, true, true, g2d_userptr->vec);
+ if (ret != npages) {
+ DRM_ERROR("failed to get user pages from userptr.\n");
+ if (ret < 0)
+ goto err_destroy_framevec;
ret = -EFAULT;
- goto err_free_pages;
+ goto err_put_framevec;
}
-
- if (vma->vm_end < userptr + size) {
- up_read(¤t->mm->mmap_sem);
- DRM_ERROR("vma is too small.\n");
+ if (frame_vector_to_pages(g2d_userptr->vec) < 0) {
ret = -EFAULT;
- goto err_free_pages;
+ goto err_put_framevec;
}
- g2d_userptr->vma = exynos_gem_get_vma(vma);
- if (!g2d_userptr->vma) {
- up_read(¤t->mm->mmap_sem);
- DRM_ERROR("failed to copy vma.\n");
- ret = -ENOMEM;
- goto err_free_pages;
- }
-
- g2d_userptr->size = size;
-
- ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
- npages, pages, vma);
- if (ret < 0) {
- up_read(¤t->mm->mmap_sem);
- DRM_ERROR("failed to get user pages from userptr.\n");
- goto err_put_vma;
- }
-
- up_read(¤t->mm->mmap_sem);
- g2d_userptr->pages = pages;
-
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt) {
ret = -ENOMEM;
- goto err_free_userptr;
+ goto err_put_framevec;
}
- ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
- size, GFP_KERNEL);
+ ret = sg_alloc_table_from_pages(sgt,
+ frame_vector_pages(g2d_userptr->vec),
+ npages, offset, size, GFP_KERNEL);
if (ret < 0) {
DRM_ERROR("failed to get sgt from pages.\n");
goto err_free_sgt;
err_free_sgt:
kfree(sgt);
- err_free_userptr:
- exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
- g2d_userptr->npages,
- g2d_userptr->vma);
-
- err_put_vma:
- exynos_gem_put_vma(g2d_userptr->vma);
+ err_put_framevec:
+ put_vaddr_frames(g2d_userptr->vec);
- err_free_pages:
- drm_free_large(pages);
+ err_destroy_framevec:
+ frame_vector_destroy(g2d_userptr->vec);
err_free:
kfree(g2d_userptr);
switch (reg_offset) {
case G2D_SRC_BASE_ADDR:
+ case G2D_SRC_STRIDE_REG:
case G2D_SRC_COLOR_MODE:
case G2D_SRC_LEFT_TOP:
case G2D_SRC_RIGHT_BOTTOM:
reg_type = REG_TYPE_SRC_PLANE2;
break;
case G2D_DST_BASE_ADDR:
+ case G2D_DST_STRIDE_REG:
case G2D_DST_COLOR_MODE:
case G2D_DST_LEFT_TOP:
case G2D_DST_RIGHT_BOTTOM:
enum g2d_reg_type reg_type,
unsigned long size)
{
- unsigned int width, height;
- unsigned long area;
+ int width, height;
+ unsigned long bpp, last_pos;
/*
* check source and destination buffers only.
if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
return true;
- width = buf_desc->right_x - buf_desc->left_x;
+ /* This check also makes sure that right_x > left_x. */
+ width = (int)buf_desc->right_x - (int)buf_desc->left_x;
if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
- DRM_ERROR("width[%u] is out of range!\n", width);
+ DRM_ERROR("width[%d] is out of range!\n", width);
return false;
}
- height = buf_desc->bottom_y - buf_desc->top_y;
+ /* This check also makes sure that bottom_y > top_y. */
+ height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
- DRM_ERROR("height[%u] is out of range!\n", height);
+ DRM_ERROR("height[%d] is out of range!\n", height);
return false;
}
- area = (unsigned long)width * (unsigned long)height *
- g2d_get_buf_bpp(buf_desc->format);
- if (area > size) {
- DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
+ bpp = g2d_get_buf_bpp(buf_desc->format);
+
+ /* Compute the position of the last byte that the engine accesses. */
+ last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
+ (unsigned long)buf_desc->stride +
+ (unsigned long)buf_desc->right_x * bpp - 1;
+
+ /*
+ * Since right_x > left_x and bottom_y > top_y we already know
+ * that the first_pos < last_pos (first_pos being the position
+ * of the first byte the engine accesses), it just remains to
+ * check if last_pos is smaller then the buffer size.
+ */
+
+ if (last_pos >= size) {
+ DRM_ERROR("last engine access position [%lu] "
+ "is out of range [%lu]!\n", last_pos, size);
return false;
}
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
/* check userptr buffer type. */
if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
} else
buf_info->types[reg_type] = BUF_TYPE_GEM;
break;
+ case G2D_SRC_STRIDE_REG:
+ case G2D_DST_STRIDE_REG:
+ if (for_addr)
+ goto err;
+
+ reg_type = g2d_get_reg_type(reg_offset);
+
+ buf_desc = &buf_info->descs[reg_type];
+ buf_desc->stride = cmdlist->data[index + 1];
+ break;
case G2D_SRC_COLOR_MODE:
case G2D_DST_COLOR_MODE:
if (for_addr)
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
return ret;
}
- if (!is_drm_iommu_supported(drm_dev))
- return 0;
-
ret = drm_iommu_attach_device(drm_dev, dev);
if (ret < 0) {
dev_err(dev, "failed to enable iommu.\n");
static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
- if (!is_drm_iommu_supported(drm_dev))
- return;
-
drm_iommu_detach_device(drm_dev, dev);
}
#include <drm/drm_vma_manager.h>
#include <linux/shmem_fs.h>
+#include <linux/dma-buf.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
-#include "exynos_drm_buf.h"
#include "exynos_drm_iommu.h"
-static unsigned int convert_to_vm_err_msg(int msg)
+static int exynos_drm_alloc_buf(struct exynos_drm_gem_obj *obj)
{
- unsigned int out_msg;
+ struct drm_device *dev = obj->base.dev;
+ enum dma_attr attr;
+ unsigned int nr_pages;
- switch (msg) {
- case 0:
- case -ERESTARTSYS:
- case -EINTR:
- out_msg = VM_FAULT_NOPAGE;
- break;
-
- case -ENOMEM:
- out_msg = VM_FAULT_OOM;
- break;
-
- default:
- out_msg = VM_FAULT_SIGBUS;
- break;
- }
-
- return out_msg;
-}
-
-static int check_gem_flags(unsigned int flags)
-{
- if (flags & ~(EXYNOS_BO_MASK)) {
- DRM_ERROR("invalid flags.\n");
- return -EINVAL;
+ if (obj->dma_addr) {
+ DRM_DEBUG_KMS("already allocated.\n");
+ return 0;
}
- return 0;
-}
+ init_dma_attrs(&obj->dma_attrs);
-static void update_vm_cache_attr(struct exynos_drm_gem_obj *obj,
- struct vm_area_struct *vma)
-{
- DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags);
+ /*
+ * if EXYNOS_BO_CONTIG, fully physically contiguous memory
+ * region will be allocated else physically contiguous
+ * as possible.
+ */
+ if (!(obj->flags & EXYNOS_BO_NONCONTIG))
+ dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &obj->dma_attrs);
- /* non-cachable as default. */
- if (obj->flags & EXYNOS_BO_CACHABLE)
- vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
- else if (obj->flags & EXYNOS_BO_WC)
- vma->vm_page_prot =
- pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+ /*
+ * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping
+ * else cachable mapping.
+ */
+ if (obj->flags & EXYNOS_BO_WC || !(obj->flags & EXYNOS_BO_CACHABLE))
+ attr = DMA_ATTR_WRITE_COMBINE;
else
- vma->vm_page_prot =
- pgprot_noncached(vm_get_page_prot(vma->vm_flags));
-}
+ attr = DMA_ATTR_NON_CONSISTENT;
+
+ dma_set_attr(attr, &obj->dma_attrs);
+ dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &obj->dma_attrs);
+
+ nr_pages = obj->size >> PAGE_SHIFT;
+
+ if (!is_drm_iommu_supported(dev)) {
+ dma_addr_t start_addr;
+ unsigned int i = 0;
+
+ obj->pages = drm_calloc_large(nr_pages, sizeof(struct page *));
+ if (!obj->pages) {
+ DRM_ERROR("failed to allocate pages.\n");
+ return -ENOMEM;
+ }
+
+ obj->cookie = dma_alloc_attrs(dev->dev,
+ obj->size,
+ &obj->dma_addr, GFP_KERNEL,
+ &obj->dma_attrs);
+ if (!obj->cookie) {
+ DRM_ERROR("failed to allocate buffer.\n");
+ drm_free_large(obj->pages);
+ return -ENOMEM;
+ }
+
+ start_addr = obj->dma_addr;
+ while (i < nr_pages) {
+ obj->pages[i] = phys_to_page(start_addr);
+ start_addr += PAGE_SIZE;
+ i++;
+ }
+ } else {
+ obj->pages = dma_alloc_attrs(dev->dev, obj->size,
+ &obj->dma_addr, GFP_KERNEL,
+ &obj->dma_attrs);
+ if (!obj->pages) {
+ DRM_ERROR("failed to allocate buffer.\n");
+ return -ENOMEM;
+ }
+ }
-static unsigned long roundup_gem_size(unsigned long size, unsigned int flags)
-{
- /* TODO */
+ DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
+ (unsigned long)obj->dma_addr,
+ obj->size);
- return roundup(size, PAGE_SIZE);
+ return 0;
}
-static int exynos_drm_gem_map_buf(struct drm_gem_object *obj,
- struct vm_area_struct *vma,
- unsigned long f_vaddr,
- pgoff_t page_offset)
+static void exynos_drm_free_buf(struct exynos_drm_gem_obj *obj)
{
- struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
- struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
- struct scatterlist *sgl;
- unsigned long pfn;
- int i;
-
- if (!buf->sgt)
- return -EINTR;
+ struct drm_device *dev = obj->base.dev;
- if (page_offset >= (buf->size >> PAGE_SHIFT)) {
- DRM_ERROR("invalid page offset\n");
- return -EINVAL;
+ if (!obj->dma_addr) {
+ DRM_DEBUG_KMS("dma_addr is invalid.\n");
+ return;
}
- sgl = buf->sgt->sgl;
- for_each_sg(buf->sgt->sgl, sgl, buf->sgt->nents, i) {
- if (page_offset < (sgl->length >> PAGE_SHIFT))
- break;
- page_offset -= (sgl->length >> PAGE_SHIFT);
- }
+ DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n",
+ (unsigned long)obj->dma_addr, obj->size);
- pfn = __phys_to_pfn(sg_phys(sgl)) + page_offset;
+ if (!is_drm_iommu_supported(dev)) {
+ dma_free_attrs(dev->dev, obj->size, obj->cookie,
+ (dma_addr_t)obj->dma_addr, &obj->dma_attrs);
+ drm_free_large(obj->pages);
+ } else
+ dma_free_attrs(dev->dev, obj->size, obj->pages,
+ (dma_addr_t)obj->dma_addr, &obj->dma_attrs);
- return vm_insert_mixed(vma, f_vaddr, pfn);
+ obj->dma_addr = (dma_addr_t)NULL;
}
static int exynos_drm_gem_handle_create(struct drm_gem_object *obj,
void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj)
{
- struct drm_gem_object *obj;
- struct exynos_drm_gem_buf *buf;
-
- obj = &exynos_gem_obj->base;
- buf = exynos_gem_obj->buffer;
+ struct drm_gem_object *obj = &exynos_gem_obj->base;
DRM_DEBUG_KMS("handle count = %d\n", obj->handle_count);
if (obj->import_attach)
goto out;
- exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf);
+ exynos_drm_free_buf(exynos_gem_obj);
out:
- exynos_drm_fini_buf(obj->dev, buf);
- exynos_gem_obj->buffer = NULL;
-
drm_gem_free_mmap_offset(obj);
/* release file pointer to gem object. */
drm_gem_object_unreference_unlocked(obj);
- return exynos_gem_obj->buffer->size;
+ return exynos_gem_obj->size;
}
exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL);
if (!exynos_gem_obj)
- return NULL;
+ return ERR_PTR(-ENOMEM);
exynos_gem_obj->size = size;
obj = &exynos_gem_obj->base;
if (ret < 0) {
DRM_ERROR("failed to initialize gem object\n");
kfree(exynos_gem_obj);
- return NULL;
+ return ERR_PTR(ret);
}
DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp);
unsigned long size)
{
struct exynos_drm_gem_obj *exynos_gem_obj;
- struct exynos_drm_gem_buf *buf;
int ret;
+ if (flags & ~(EXYNOS_BO_MASK)) {
+ DRM_ERROR("invalid flags.\n");
+ return ERR_PTR(-EINVAL);
+ }
+
if (!size) {
DRM_ERROR("invalid size.\n");
return ERR_PTR(-EINVAL);
}
- size = roundup_gem_size(size, flags);
-
- ret = check_gem_flags(flags);
- if (ret)
- return ERR_PTR(ret);
-
- buf = exynos_drm_init_buf(dev, size);
- if (!buf)
- return ERR_PTR(-ENOMEM);
+ size = roundup(size, PAGE_SIZE);
exynos_gem_obj = exynos_drm_gem_init(dev, size);
- if (!exynos_gem_obj) {
- ret = -ENOMEM;
- goto err_fini_buf;
- }
-
- exynos_gem_obj->buffer = buf;
+ if (IS_ERR(exynos_gem_obj))
+ return exynos_gem_obj;
/* set memory type and cache attribute from user side. */
exynos_gem_obj->flags = flags;
- ret = exynos_drm_alloc_buf(dev, buf, flags);
- if (ret < 0)
- goto err_gem_fini;
+ ret = exynos_drm_alloc_buf(exynos_gem_obj);
+ if (ret < 0) {
+ drm_gem_object_release(&exynos_gem_obj->base);
+ kfree(exynos_gem_obj);
+ return ERR_PTR(ret);
+ }
return exynos_gem_obj;
-
-err_gem_fini:
- drm_gem_object_release(&exynos_gem_obj->base);
- kfree(exynos_gem_obj);
-err_fini_buf:
- exynos_drm_fini_buf(dev, buf);
- return ERR_PTR(ret);
}
int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
exynos_gem_obj = to_exynos_gem_obj(obj);
- return &exynos_gem_obj->buffer->dma_addr;
+ return &exynos_gem_obj->dma_addr;
}
void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
struct vm_area_struct *vma)
{
struct drm_device *drm_dev = exynos_gem_obj->base.dev;
- struct exynos_drm_gem_buf *buffer;
unsigned long vm_size;
int ret;
vm_size = vma->vm_end - vma->vm_start;
- /*
- * a buffer contains information to physically continuous memory
- * allocated by user request or at framebuffer creation.
- */
- buffer = exynos_gem_obj->buffer;
-
/* check if user-requested size is valid. */
- if (vm_size > buffer->size)
+ if (vm_size > exynos_gem_obj->size)
return -EINVAL;
- ret = dma_mmap_attrs(drm_dev->dev, vma, buffer->pages,
- buffer->dma_addr, buffer->size,
- &buffer->dma_attrs);
+ ret = dma_mmap_attrs(drm_dev->dev, vma, exynos_gem_obj->pages,
+ exynos_gem_obj->dma_addr, exynos_gem_obj->size,
+ &exynos_gem_obj->dma_attrs);
if (ret < 0) {
DRM_ERROR("failed to mmap.\n");
return ret;
return 0;
}
- struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma)
- {
- struct vm_area_struct *vma_copy;
-
- vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL);
- if (!vma_copy)
- return NULL;
-
- if (vma->vm_ops && vma->vm_ops->open)
- vma->vm_ops->open(vma);
-
- if (vma->vm_file)
- get_file(vma->vm_file);
-
- memcpy(vma_copy, vma, sizeof(*vma));
-
- vma_copy->vm_mm = NULL;
- vma_copy->vm_next = NULL;
- vma_copy->vm_prev = NULL;
-
- return vma_copy;
- }
-
- void exynos_gem_put_vma(struct vm_area_struct *vma)
- {
- if (!vma)
- return;
-
- if (vma->vm_ops && vma->vm_ops->close)
- vma->vm_ops->close(vma);
-
- if (vma->vm_file)
- fput(vma->vm_file);
-
- kfree(vma);
- }
-
- int exynos_gem_get_pages_from_userptr(unsigned long start,
- unsigned int npages,
- struct page **pages,
- struct vm_area_struct *vma)
- {
- int get_npages;
-
- /* the memory region mmaped with VM_PFNMAP. */
- if (vma_is_io(vma)) {
- unsigned int i;
-
- for (i = 0; i < npages; ++i, start += PAGE_SIZE) {
- unsigned long pfn;
- int ret = follow_pfn(vma, start, &pfn);
- if (ret)
- return ret;
-
- pages[i] = pfn_to_page(pfn);
- }
-
- if (i != npages) {
- DRM_ERROR("failed to get user_pages.\n");
- return -EINVAL;
- }
-
- return 0;
- }
-
- get_npages = get_user_pages(current, current->mm, start,
- npages, 1, 1, pages, NULL);
- get_npages = max(get_npages, 0);
- if (get_npages != npages) {
- DRM_ERROR("failed to get user_pages.\n");
- while (get_npages)
- put_page(pages[--get_npages]);
- return -EFAULT;
- }
-
- return 0;
- }
-
- void exynos_gem_put_pages_to_userptr(struct page **pages,
- unsigned int npages,
- struct vm_area_struct *vma)
- {
- if (!vma_is_io(vma)) {
- unsigned int i;
-
- for (i = 0; i < npages; i++) {
- set_page_dirty_lock(pages[i]);
-
- /*
- * undo the reference we took when populating
- * the table.
- */
- put_page(pages[i]);
- }
- }
- }
-
int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
struct sg_table *sgt,
enum dma_data_direction dir)
void exynos_drm_gem_free_object(struct drm_gem_object *obj)
{
- struct exynos_drm_gem_obj *exynos_gem_obj;
- struct exynos_drm_gem_buf *buf;
-
- exynos_gem_obj = to_exynos_gem_obj(obj);
- buf = exynos_gem_obj->buffer;
-
- if (obj->import_attach)
- drm_prime_gem_destroy(obj, buf->sgt);
-
exynos_drm_gem_destroy(to_exynos_gem_obj(obj));
}
int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct drm_gem_object *obj = vma->vm_private_data;
- struct drm_device *dev = obj->dev;
- unsigned long f_vaddr;
+ struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
+ unsigned long pfn;
pgoff_t page_offset;
int ret;
page_offset = ((unsigned long)vmf->virtual_address -
vma->vm_start) >> PAGE_SHIFT;
- f_vaddr = (unsigned long)vmf->virtual_address;
- mutex_lock(&dev->struct_mutex);
+ if (page_offset >= (exynos_gem_obj->size >> PAGE_SHIFT)) {
+ DRM_ERROR("invalid page offset\n");
+ ret = -EINVAL;
+ goto out;
+ }
- ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset);
- if (ret < 0)
- DRM_ERROR("failed to map a buffer with user.\n");
+ pfn = page_to_pfn(exynos_gem_obj->pages[page_offset]);
+ ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn);
- mutex_unlock(&dev->struct_mutex);
-
- return convert_to_vm_err_msg(ret);
+out:
+ switch (ret) {
+ case 0:
+ case -ERESTARTSYS:
+ case -EINTR:
+ return VM_FAULT_NOPAGE;
+ case -ENOMEM:
+ return VM_FAULT_OOM;
+ default:
+ return VM_FAULT_SIGBUS;
+ }
}
int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
obj = vma->vm_private_data;
exynos_gem_obj = to_exynos_gem_obj(obj);
- ret = check_gem_flags(exynos_gem_obj->flags);
- if (ret)
- goto err_close_vm;
+ DRM_DEBUG_KMS("flags = 0x%x\n", exynos_gem_obj->flags);
- update_vm_cache_attr(exynos_gem_obj, vma);
+ /* non-cachable as default. */
+ if (exynos_gem_obj->flags & EXYNOS_BO_CACHABLE)
+ vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
+ else if (exynos_gem_obj->flags & EXYNOS_BO_WC)
+ vma->vm_page_prot =
+ pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+ else
+ vma->vm_page_prot =
+ pgprot_noncached(vm_get_page_prot(vma->vm_flags));
ret = exynos_drm_gem_mmap_buffer(exynos_gem_obj, vma);
if (ret)
return ret;
}
+
+/* low-level interface prime helpers */
+struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+ struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
+ int npages;
+
+ npages = exynos_gem_obj->size >> PAGE_SHIFT;
+
+ return drm_prime_pages_to_sg(exynos_gem_obj->pages, npages);
+}
+
+struct drm_gem_object *
+exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sgt)
+{
+ struct exynos_drm_gem_obj *exynos_gem_obj;
+ int npages;
+ int ret;
+
+ exynos_gem_obj = exynos_drm_gem_init(dev, attach->dmabuf->size);
+ if (IS_ERR(exynos_gem_obj)) {
+ ret = PTR_ERR(exynos_gem_obj);
+ return ERR_PTR(ret);
+ }
+
+ exynos_gem_obj->dma_addr = sg_dma_address(sgt->sgl);
+
+ npages = exynos_gem_obj->size >> PAGE_SHIFT;
+ exynos_gem_obj->pages = drm_malloc_ab(npages, sizeof(struct page *));
+ if (!exynos_gem_obj->pages) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = drm_prime_sg_to_page_addr_arrays(sgt, exynos_gem_obj->pages, NULL,
+ npages);
+ if (ret < 0)
+ goto err_free_large;
+
+ if (sgt->nents == 1) {
+ /* always physically continuous memory if sgt->nents is 1. */
+ exynos_gem_obj->flags |= EXYNOS_BO_CONTIG;
+ } else {
+ /*
+ * this case could be CONTIG or NONCONTIG type but for now
+ * sets NONCONTIG.
+ * TODO. we have to find a way that exporter can notify
+ * the type of its own buffer to importer.
+ */
+ exynos_gem_obj->flags |= EXYNOS_BO_NONCONTIG;
+ }
+
+ return &exynos_gem_obj->base;
+
+err_free_large:
+ drm_free_large(exynos_gem_obj->pages);
+err:
+ drm_gem_object_release(&exynos_gem_obj->base);
+ kfree(exynos_gem_obj);
+ return ERR_PTR(ret);
+}
+
+void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj)
+{
+ return NULL;
+}
+
+void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+ /* Nothing to do */
+}
}
/*
- * omap_vout_uservirt_to_phys: This inline function is used to convert user
- * space virtual address to physical address.
+ * omap_vout_get_userptr: Convert user space virtual address to physical
+ * address.
*/
- static unsigned long omap_vout_uservirt_to_phys(unsigned long virtp)
+ static int omap_vout_get_userptr(struct videobuf_buffer *vb, u32 virtp,
+ u32 *physp)
{
- unsigned long physp = 0;
- struct vm_area_struct *vma;
- struct mm_struct *mm = current->mm;
+ struct frame_vector *vec;
+ int ret;
/* For kernel direct-mapped memory, take the easy way */
- if (virtp >= PAGE_OFFSET)
- return virt_to_phys((void *) virtp);
-
- down_read(¤t->mm->mmap_sem);
- vma = find_vma(mm, virtp);
- if (vma && (vma->vm_flags & VM_IO) && vma->vm_pgoff) {
- /* this will catch, kernel-allocated, mmaped-to-usermode
- addresses */
- physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
- up_read(¤t->mm->mmap_sem);
- } else {
- /* otherwise, use get_user_pages() for general userland pages */
- int res, nr_pages = 1;
- struct page *pages;
-
- res = get_user_pages(current, current->mm, virtp, nr_pages, 1,
- 0, &pages, NULL);
- up_read(¤t->mm->mmap_sem);
-
- if (res == nr_pages) {
- physp = __pa(page_address(&pages[0]) +
- (virtp & ~PAGE_MASK));
- } else {
- printk(KERN_WARNING VOUT_NAME
- "get_user_pages failed\n");
- return 0;
- }
+ if (virtp >= PAGE_OFFSET) {
+ *physp = virt_to_phys((void *)virtp);
+ return 0;
+ }
+
+ vec = frame_vector_create(1);
+ if (!vec)
+ return -ENOMEM;
+
+ ret = get_vaddr_frames(virtp, 1, true, false, vec);
+ if (ret != 1) {
+ frame_vector_destroy(vec);
+ return -EINVAL;
}
+ *physp = __pfn_to_phys(frame_vector_pfns(vec)[0]);
+ vb->priv = vec;
- return physp;
+ return 0;
}
/*
* address of the buffer
*/
if (V4L2_MEMORY_USERPTR == vb->memory) {
+ int ret;
+
if (0 == vb->baddr)
return -EINVAL;
/* Physical address */
- vout->queued_buf_addr[vb->i] = (u8 *)
- omap_vout_uservirt_to_phys(vb->baddr);
+ ret = omap_vout_get_userptr(vb, vb->baddr,
+ (u32 *)&vout->queued_buf_addr[vb->i]);
+ if (ret < 0)
+ return ret;
} else {
unsigned long addr, dma_addr;
unsigned long size;
static void omap_vout_buffer_release(struct videobuf_queue *q,
struct videobuf_buffer *vb)
{
- struct omap_vout_device *vout = q->priv_data;
-
vb->state = VIDEOBUF_NEEDS_INIT;
+ if (vb->memory == V4L2_MEMORY_USERPTR && vb->priv) {
+ struct frame_vector *vec = vb->priv;
- if (V4L2_MEMORY_MMAP != vout->memory)
- return;
+ put_vaddr_frames(vec);
+ frame_vector_destroy(vec);
+ }
}
/*
vout->mmap_count--;
}
-static struct vm_operations_struct omap_vout_vm_ops = {
+static const struct vm_operations_struct omap_vout_vm_ops = {
.open = omap_vout_vm_open,
.close = omap_vout_vm_close,
};
break;
case VB2_BUF_STATE_PREPARING:
case VB2_BUF_STATE_DEQUEUED:
+ case VB2_BUF_STATE_REQUEUEING:
/* nothing */
break;
}
if (WARN_ON(state != VB2_BUF_STATE_DONE &&
state != VB2_BUF_STATE_ERROR &&
- state != VB2_BUF_STATE_QUEUED))
+ state != VB2_BUF_STATE_QUEUED &&
+ state != VB2_BUF_STATE_REQUEUEING))
state = VB2_BUF_STATE_ERROR;
#ifdef CONFIG_VIDEO_ADV_DEBUG
for (plane = 0; plane < vb->num_planes; ++plane)
call_void_memop(vb, finish, vb->planes[plane].mem_priv);
- /* Add the buffer to the done buffers list */
spin_lock_irqsave(&q->done_lock, flags);
- vb->state = state;
- if (state != VB2_BUF_STATE_QUEUED)
+ if (state == VB2_BUF_STATE_QUEUED ||
+ state == VB2_BUF_STATE_REQUEUEING) {
+ vb->state = VB2_BUF_STATE_QUEUED;
+ } else {
+ /* Add the buffer to the done buffers list */
list_add_tail(&vb->done_entry, &q->done_list);
+ vb->state = state;
+ }
atomic_dec(&q->owned_by_drv_count);
spin_unlock_irqrestore(&q->done_lock, flags);
trace_vb2_buf_done(q, vb);
- if (state == VB2_BUF_STATE_QUEUED) {
+ switch (state) {
+ case VB2_BUF_STATE_QUEUED:
+ return;
+ case VB2_BUF_STATE_REQUEUEING:
if (q->start_streaming_called)
__enqueue_in_driver(vb);
return;
+ default:
+ /* Inform any processes that may be waiting for buffers */
+ wake_up(&q->done_wq);
+ break;
}
-
- /* Inform any processes that may be waiting for buffers */
- wake_up(&q->done_wq);
}
EXPORT_SYMBOL_GPL(vb2_buffer_done);
static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
{
- static bool __check_once __read_mostly;
+ static bool check_once;
- if (__check_once)
+ if (check_once)
return;
- __check_once = true;
- __WARN();
+ check_once = true;
+ WARN_ON(1);
- pr_warn_once("use of bytesused == 0 is deprecated and will be removed in the future,\n");
+ pr_warn("use of bytesused == 0 is deprecated and will be removed in the future,\n");
if (vb->vb2_queue->allow_zero_bytesused)
- pr_warn_once("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n");
+ pr_warn("use VIDIOC_DECODER_CMD(V4L2_DEC_CMD_STOP) instead.\n");
else
- pr_warn_once("use the actual size instead.\n");
+ pr_warn("use the actual size instead.\n");
}
/**
ret = __qbuf_mmap(vb, b);
break;
case V4L2_MEMORY_USERPTR:
- down_read(¤t->mm->mmap_sem);
ret = __qbuf_userptr(vb, b);
- up_read(¤t->mm->mmap_sem);
break;
case V4L2_MEMORY_DMABUF:
ret = __qbuf_dmabuf(vb, b);
#include <linux/shrinker.h>
#include <linux/resource.h>
#include <linux/page_ext.h>
+ #include <linux/err.h>
struct mempolicy;
struct anon_vma;
#define VM_MAYSHARE 0x00000080
#define VM_GROWSDOWN 0x00000100 /* general info on the segment */
+#define VM_UFFD_MISSING 0x00000200 /* missing pages tracking */
#define VM_PFNMAP 0x00000400 /* Page-ranges managed without "struct page", just pure PFN */
#define VM_DENYWRITE 0x00000800 /* ETXTBSY on write attempts.. */
+#define VM_UFFD_WP 0x00001000 /* wrprotect pages tracking */
#define VM_LOCKED 0x00002000
#define VM_IO 0x00004000 /* Memory mapped I/O or similar */
struct vm_operations_struct {
void (*open)(struct vm_area_struct * area);
void (*close)(struct vm_area_struct * area);
+ int (*mremap)(struct vm_area_struct * area);
int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf);
+ int (*pmd_fault)(struct vm_area_struct *, unsigned long address,
+ pmd_t *, unsigned int flags);
void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf);
/* notification that a previously read-only page is about to become
#define page_private(page) ((page)->private)
#define set_page_private(page, v) ((page)->private = (v))
-/* It's valid only if the page is free path or free_list */
-static inline void set_freepage_migratetype(struct page *page, int migratetype)
-{
- page->index = migratetype;
-}
-
-/* It's valid only if the page is free path or free_list */
-static inline int get_freepage_migratetype(struct page *page)
-{
- return page->index;
-}
-
/*
* FIXME: take this include out, include page-flags.h in
* files which need it (119 of them)
return atomic_inc_not_zero(&page->_count);
}
-/*
- * Try to drop a ref unless the page has a refcount of one, return false if
- * that is the case.
- * This is to make sure that the refcount won't become zero after this drop.
- * This can be called when MMU is off so it must not access
- * any of the virtual mappings.
- */
-static inline int put_page_unless_one(struct page *page)
-{
- return atomic_add_unless(&page->_count, -1, 1);
-}
-
extern int page_is_ram(unsigned long pfn);
-extern int region_is_ram(resource_size_t phys_addr, unsigned long size);
+
+enum {
+ REGION_INTERSECTS,
+ REGION_DISJOINT,
+ REGION_MIXED,
+};
+
+int region_intersects(resource_size_t offset, size_t size, const char *type);
/* Support for virtually mapped pages */
struct page *vmalloc_to_page(const void *addr);
return atomic_read(&(page)->_mapcount) >= 0;
}
+/*
+ * Return true only if the page has been allocated with
+ * ALLOC_NO_WATERMARKS and the low watermark was not
+ * met implying that the system is under some pressure.
+ */
+static inline bool page_is_pfmemalloc(struct page *page)
+{
+ /*
+ * Page index cannot be this large so this must be
+ * a pfmemalloc page.
+ */
+ return page->index == -1UL;
+}
+
+/*
+ * Only to be called by the page allocator on a freshly allocated
+ * page.
+ */
+static inline void set_page_pfmemalloc(struct page *page)
+{
+ page->index = -1UL;
+}
+
+static inline void clear_page_pfmemalloc(struct page *page)
+{
+ page->index = 0;
+}
+
/*
* Different kinds of faults, as returned by handle_mm_fault().
* Used to decide whether a process gets delivered SIGBUS or
int write, int force, struct page **pages);
int get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages);
+
+ /* Container for pinned pfns / pages */
+ struct frame_vector {
+ unsigned int nr_allocated; /* Number of frames we have space for */
+ unsigned int nr_frames; /* Number of frames stored in ptrs array */
+ bool got_ref; /* Did we pin pages by getting page ref? */
+ bool is_pfns; /* Does array contain pages or pfns? */
+ void *ptrs[0]; /* Array of pinned pfns / pages. Use
+ * pfns_vector_pages() or pfns_vector_pfns()
+ * for access */
+ };
+
+ struct frame_vector *frame_vector_create(unsigned int nr_frames);
+ void frame_vector_destroy(struct frame_vector *vec);
+ int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,
+ bool write, bool force, struct frame_vector *vec);
+ void put_vaddr_frames(struct frame_vector *vec);
+ int frame_vector_to_pages(struct frame_vector *vec);
+ void frame_vector_to_pfns(struct frame_vector *vec);
+
+ static inline unsigned int frame_vector_count(struct frame_vector *vec)
+ {
+ return vec->nr_frames;
+ }
+
+ static inline struct page **frame_vector_pages(struct frame_vector *vec)
+ {
+ if (vec->is_pfns) {
+ int err = frame_vector_to_pages(vec);
+
+ if (err)
+ return ERR_PTR(err);
+ }
+ return (struct page **)(vec->ptrs);
+ }
+
+ static inline unsigned long *frame_vector_pfns(struct frame_vector *vec)
+ {
+ if (!vec->is_pfns)
+ frame_vector_to_pfns(vec);
+ return (unsigned long *)(vec->ptrs);
+ }
+
struct kvec;
int get_kernel_pages(const struct kvec *iov, int nr_pages, int write,
struct page **pages);
return vma && (vma->vm_end == addr) && (vma->vm_flags & VM_GROWSDOWN);
}
+static inline bool vma_is_anonymous(struct vm_area_struct *vma)
+{
+ return !vma->vm_ops;
+}
+
static inline int stack_guard_page_start(struct vm_area_struct *vma,
unsigned long addr)
{
extern struct vm_area_struct *vma_merge(struct mm_struct *,
struct vm_area_struct *prev, unsigned long addr, unsigned long end,
unsigned long vm_flags, struct anon_vma *, struct file *, pgoff_t,
- struct mempolicy *);
+ struct mempolicy *, struct vm_userfaultfd_ctx);
extern struct anon_vma *find_mergeable_anon_vma(struct vm_area_struct *);
extern int split_vma(struct mm_struct *,
struct vm_area_struct *, unsigned long addr, int new_below);
extern unsigned long mmap_region(struct file *file, unsigned long addr,
unsigned long len, vm_flags_t vm_flags, unsigned long pgoff);
-extern unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
+extern unsigned long do_mmap(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot, unsigned long flags,
- unsigned long pgoff, unsigned long *populate);
+ vm_flags_t vm_flags, unsigned long pgoff, unsigned long *populate);
extern int do_munmap(struct mm_struct *, unsigned long, size_t);
+static inline unsigned long
+do_mmap_pgoff(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long prot, unsigned long flags,
+ unsigned long pgoff, unsigned long *populate)
+{
+ return do_mmap(file, addr, len, prot, flags, 0, pgoff, populate);
+}
+
#ifdef CONFIG_MMU
extern int __mm_populate(unsigned long addr, unsigned long len,
int ignore_errors);
extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);
extern int unpoison_memory(unsigned long pfn);
extern int get_hwpoison_page(struct page *page);
+extern void put_hwpoison_page(struct page *page);
extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
#define _MEDIA_VIDEOBUF2_MEMOPS_H
#include <media/videobuf2-core.h>
+ #include <linux/mm.h>
/**
- * vb2_vmarea_handler - common vma refcount tracking handler
+ * struct vb2_vmarea_handler - common vma refcount tracking handler
+ *
* @refcount: pointer to refcount entry in the buffer
* @put: callback to function that decreases buffer refcount
* @arg: argument for @put callback
extern const struct vm_operations_struct vb2_common_vm_ops;
- int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
- struct vm_area_struct **res_vma, dma_addr_t *res_pa);
-
- struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
- void vb2_put_vma(struct vm_area_struct *vma);
-
+ struct frame_vector *vb2_create_framevec(unsigned long start,
+ unsigned long length,
+ bool write);
+ void vb2_destroy_framevec(struct frame_vector *vec);
#endif
# On the 'tile' arch, USB OHCI needs the bounce pool since tilegx will often
# have more than 4GB of memory, but we don't currently use the IOTLB to present
# a 32-bit address to OHCI. So we need to use a bounce pool instead.
-#
-# We also use the bounce pool to provide stable page writes for jbd. jbd
-# initiates buffer writeback without locking the page or setting PG_writeback,
-# and fixing that behavior (a second time; jbd2 doesn't have this problem) is
-# a major rework effort. Instead, use the bounce buffer to snapshot pages
-# (until jbd goes away). The only jbd user is ext3.
config NEED_BOUNCE_POOL
bool
- default y if (TILE && USB_OHCI_HCD) || (BLK_DEV_INTEGRITY && JBD)
+ default y if TILE && USB_OHCI_HCD
config NR_QUICK
int
processes running early in the lifetime of the systemm until kswapd
finishes the initialisation.
+config IDLE_PAGE_TRACKING
+ bool "Enable idle page tracking"
+ depends on SYSFS && MMU
+ select PAGE_EXTENSION if !64BIT
+ help
+ This feature allows to estimate the amount of user pages that have
+ not been touched during a given period of time. This information can
+ be useful to tune memory cgroup limits and/or for job placement
+ within a compute cluster.
+
+ See Documentation/vm/idle_page_tracking.txt for more details.
+
+config ZONE_DEVICE
+ bool "Device memory (pmem, etc...) hotplug support" if EXPERT
+ default !ZONE_DMA
+ depends on !ZONE_DMA
+ depends on MEMORY_HOTPLUG
+ depends on MEMORY_HOTREMOVE
+ depends on X86_64 #arch_add_memory() comprehends device memory
+
+ help
+ Device memory hotplug support allows for establishing pmem,
+ or other device driver discovered memory regions, in the
+ memmap. This allows pfn_to_page() lookups of otherwise
+ "device-physical" addresses which is needed for using a DAX
+ mapping in an O_DIRECT operation, among other things.
+
+ If FS_DAX is enabled, then say Y.
++
+ config FRAME_VECTOR
+ bool
obj-$(CONFIG_MEMORY_BALLOON) += balloon_compaction.o
obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o
+obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
+obj-$(CONFIG_IDLE_PAGE_TRACKING) += page_idle.o
+ obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o
projects / deliverable / linux.git / commitdiff
