Hello,

On 2016-06-30 10:25, Krzysztof Kozlowski wrote:
Split out subsystem specific changes for easier reviews. This will be
squashed with main commit.

Signed-off-by: Krzysztof Kozlowski <k.kozlow...@samsung.com>

[for vb2-core]
Reviewed-by: Marek Szyprowski <m.szyprow...@samsung.com>

Please note that vb2 code is being modified now by Hans Verkuil, who is
working on complete removal of allocator contexts from vb2 queue.
You can check his patches here:
https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=context3

[for bdisp]
Acked-by: Fabien Dessenne <fabien.desse...@st.com>
---
  drivers/media/platform/sti/bdisp/bdisp-hw.c    | 26 +++++++---------------
  drivers/media/v4l2-core/videobuf2-dma-contig.c | 30 +++++++++++---------------
  drivers/media/v4l2-core/videobuf2-dma-sg.c     | 19 ++++------------
  include/media/videobuf2-dma-contig.h           |  7 ++----
  4 files changed, 26 insertions(+), 56 deletions(-)

diff --git a/drivers/media/platform/sti/bdisp/bdisp-hw.c 
b/drivers/media/platform/sti/bdisp/bdisp-hw.c
index 052c932ac942..d86ba40eec8d 100644
--- a/drivers/media/platform/sti/bdisp/bdisp-hw.c
+++ b/drivers/media/platform/sti/bdisp/bdisp-hw.c
@@ -125,14 +125,11 @@ int bdisp_hw_get_and_clear_irq(struct bdisp_dev *bdisp)
   */
  void bdisp_hw_free_nodes(struct bdisp_ctx *ctx)
  {
-       if (ctx && ctx->node[0]) {
-               DEFINE_DMA_ATTRS(attrs);
-
-               dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
+       if (ctx && ctx->node[0])
                dma_free_attrs(ctx->bdisp_dev->dev,
                               sizeof(struct bdisp_node) * MAX_NB_NODE,
-                              ctx->node[0], ctx->node_paddr[0], &attrs);
-       }
+                              ctx->node[0], ctx->node_paddr[0],
+                              DMA_ATTR_WRITE_COMBINE);
  }
/**
@@ -150,12 +147,10 @@ int bdisp_hw_alloc_nodes(struct bdisp_ctx *ctx)
        unsigned int i, node_size = sizeof(struct bdisp_node);
        void *base;
        dma_addr_t paddr;
-       DEFINE_DMA_ATTRS(attrs);
/* Allocate all the nodes within a single memory page */
-       dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
        base = dma_alloc_attrs(dev, node_size * MAX_NB_NODE, &paddr,
-                              GFP_KERNEL | GFP_DMA, &attrs);
+                              GFP_KERNEL | GFP_DMA, DMA_ATTR_WRITE_COMBINE);
        if (!base) {
                dev_err(dev, "%s no mem\n", __func__);
                return -ENOMEM;
@@ -188,13 +183,9 @@ void bdisp_hw_free_filters(struct device *dev)
  {
        int size = (BDISP_HF_NB * NB_H_FILTER) + (BDISP_VF_NB * NB_V_FILTER);
- if (bdisp_h_filter[0].virt) {
-               DEFINE_DMA_ATTRS(attrs);
-
-               dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
+       if (bdisp_h_filter[0].virt)
                dma_free_attrs(dev, size, bdisp_h_filter[0].virt,
-                              bdisp_h_filter[0].paddr, &attrs);
-       }
+                              bdisp_h_filter[0].paddr, DMA_ATTR_WRITE_COMBINE);
  }
/**
@@ -211,12 +202,11 @@ int bdisp_hw_alloc_filters(struct device *dev)
        unsigned int i, size;
        void *base;
        dma_addr_t paddr;
-       DEFINE_DMA_ATTRS(attrs);
/* Allocate all the filters within a single memory page */
        size = (BDISP_HF_NB * NB_H_FILTER) + (BDISP_VF_NB * NB_V_FILTER);
-       dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
-       base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL | GFP_DMA, &attrs);
+       base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL | GFP_DMA,
+                              DMA_ATTR_WRITE_COMBINE);
        if (!base)
                return -ENOMEM;
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 5361197f3e57..8009a582326b 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -23,7 +23,7 @@
struct vb2_dc_conf {
        struct device           *dev;
-       struct dma_attrs        attrs;
+       unsigned long           attrs;
  };
struct vb2_dc_buf {
@@ -32,7 +32,7 @@ struct vb2_dc_buf {
        unsigned long                   size;
        void                            *cookie;
        dma_addr_t                      dma_addr;
-       struct dma_attrs                attrs;
+       unsigned long                   attrs;
        enum dma_data_direction         dma_dir;
        struct sg_table                 *dma_sgt;
        struct frame_vector             *vec;
@@ -135,7 +135,7 @@ static void vb2_dc_put(void *buf_priv)
                kfree(buf->sgt_base);
        }
        dma_free_attrs(buf->dev, buf->size, buf->cookie, buf->dma_addr,
-                       &buf->attrs);
+                      buf->attrs);
        put_device(buf->dev);
        kfree(buf);
  }
@@ -153,14 +153,14 @@ static void *vb2_dc_alloc(void *alloc_ctx, unsigned long 
size,
buf->attrs = conf->attrs;
        buf->cookie = dma_alloc_attrs(dev, size, &buf->dma_addr,
-                                       GFP_KERNEL | gfp_flags, &buf->attrs);
+                                       GFP_KERNEL | gfp_flags, buf->attrs);
        if (!buf->cookie) {
                dev_err(dev, "dma_alloc_coherent of size %ld failed\n", size);
                kfree(buf);
                return ERR_PTR(-ENOMEM);
        }
- if (!dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, &buf->attrs))
+       if (!dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, buf->attrs))
                buf->vaddr = buf->cookie;
/* Prevent the device from being released while the buffer is used */
@@ -194,7 +194,7 @@ static int vb2_dc_mmap(void *buf_priv, struct 
vm_area_struct *vma)
        vma->vm_pgoff = 0;
ret = dma_mmap_attrs(buf->dev, vma, buf->cookie,
-               buf->dma_addr, buf->size, &buf->attrs);
+               buf->dma_addr, buf->size, buf->attrs);
if (ret) {
                pr_err("Remapping memory failed, error: %d\n", ret);
@@ -377,7 +377,7 @@ static struct sg_table *vb2_dc_get_base_sgt(struct 
vb2_dc_buf *buf)
        }
ret = dma_get_sgtable_attrs(buf->dev, sgt, buf->cookie, buf->dma_addr,
-               buf->size, &buf->attrs);
+               buf->size, buf->attrs);
        if (ret < 0) {
                dev_err(buf->dev, "failed to get scatterlist from DMA API\n");
                kfree(sgt);
@@ -426,15 +426,12 @@ static void vb2_dc_put_userptr(void *buf_priv)
        struct page **pages;
if (sgt) {
-               DEFINE_DMA_ATTRS(attrs);
-
-               dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
                /*
                 * No need to sync to CPU, it's already synced to the CPU
                 * since the finish() memop will have been called before this.
                 */
                dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                                  buf->dma_dir, &attrs);
+                                  buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
                pages = frame_vector_pages(buf->vec);
                /* sgt should exist only if vector contains pages... */
                BUG_ON(IS_ERR(pages));
@@ -490,9 +487,6 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned 
long vaddr,
        struct sg_table *sgt;
        unsigned long contig_size;
        unsigned long dma_align = dma_get_cache_alignment();
-       DEFINE_DMA_ATTRS(attrs);
-
-       dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
/* Only cache aligned DMA transfers are reliable */
        if (!IS_ALIGNED(vaddr | size, dma_align)) {
@@ -554,7 +548,7 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned 
long vaddr,
         * prepare() memop is called.
         */
        sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                                     buf->dma_dir, &attrs);
+                                     buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
        if (sgt->nents <= 0) {
                pr_err("failed to map scatterlist\n");
                ret = -EIO;
@@ -578,7 +572,7 @@ out:
fail_map_sg:
        dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                          buf->dma_dir, &attrs);
+                          buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
fail_sgt_init:
        sg_free_table(sgt);
@@ -730,7 +724,7 @@ const struct vb2_mem_ops vb2_dma_contig_memops = {
  EXPORT_SYMBOL_GPL(vb2_dma_contig_memops);
void *vb2_dma_contig_init_ctx_attrs(struct device *dev,
-                                   struct dma_attrs *attrs)
+                                   unsigned long attrs)
  {
        struct vb2_dc_conf *conf;
@@ -740,7 +734,7 @@ void *vb2_dma_contig_init_ctx_attrs(struct device *dev, conf->dev = dev;
        if (attrs)
-               conf->attrs = *attrs;
+               conf->attrs = attrs;
return conf;
  }
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c 
b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index 9985c89f0513..94f24e610fe7 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -107,9 +107,6 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned 
long size,
        struct sg_table *sgt;
        int ret;
        int num_pages;
-       DEFINE_DMA_ATTRS(attrs);
-
-       dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
if (WARN_ON(alloc_ctx == NULL))
                return NULL;
@@ -148,7 +145,7 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned 
long size,
         * prepare() memop is called.
         */
        sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                                     buf->dma_dir, &attrs);
+                                     buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
        if (!sgt->nents)
                goto fail_map;
@@ -183,13 +180,10 @@ static void vb2_dma_sg_put(void *buf_priv)
        int i = buf->num_pages;
if (atomic_dec_and_test(&buf->refcount)) {
-               DEFINE_DMA_ATTRS(attrs);
-
-               dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
                dprintk(1, "%s: Freeing buffer of %d pages\n", __func__,
                        buf->num_pages);
                dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                                  buf->dma_dir, &attrs);
+                                  buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
                if (buf->vaddr)
                        vm_unmap_ram(buf->vaddr, buf->num_pages);
                sg_free_table(buf->dma_sgt);
@@ -233,10 +227,8 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, 
unsigned long vaddr,
        struct vb2_dma_sg_conf *conf = alloc_ctx;
        struct vb2_dma_sg_buf *buf;
        struct sg_table *sgt;
-       DEFINE_DMA_ATTRS(attrs);
        struct frame_vector *vec;
- dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
        buf = kzalloc(sizeof *buf, GFP_KERNEL);
        if (!buf)
                return NULL;
@@ -267,7 +259,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, 
unsigned long vaddr,
         * prepare() memop is called.
         */
        sgt->nents = dma_map_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents,
-                                     buf->dma_dir, &attrs);
+                                     buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
        if (!sgt->nents)
                goto userptr_fail_map;
@@ -291,14 +283,11 @@ static void vb2_dma_sg_put_userptr(void *buf_priv)
        struct vb2_dma_sg_buf *buf = buf_priv;
        struct sg_table *sgt = &buf->sg_table;
        int i = buf->num_pages;
-       DEFINE_DMA_ATTRS(attrs);
-
-       dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
dprintk(1, "%s: Releasing userspace buffer of %d pages\n",
               __func__, buf->num_pages);
        dma_unmap_sg_attrs(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir,
-                          &attrs);
+                          DMA_ATTR_SKIP_CPU_SYNC);
        if (buf->vaddr)
                vm_unmap_ram(buf->vaddr, buf->num_pages);
        sg_free_table(buf->dma_sgt);
diff --git a/include/media/videobuf2-dma-contig.h 
b/include/media/videobuf2-dma-contig.h
index 2087c9a68be3..048df1320451 100644
--- a/include/media/videobuf2-dma-contig.h
+++ b/include/media/videobuf2-dma-contig.h
@@ -16,8 +16,6 @@
  #include <media/videobuf2-v4l2.h>
  #include <linux/dma-mapping.h>
-struct dma_attrs;
-
  static inline dma_addr_t
  vb2_dma_contig_plane_dma_addr(struct vb2_buffer *vb, unsigned int plane_no)
  {
@@ -26,12 +24,11 @@ vb2_dma_contig_plane_dma_addr(struct vb2_buffer *vb, 
unsigned int plane_no)
        return *addr;
  }
-void *vb2_dma_contig_init_ctx_attrs(struct device *dev,
-                                   struct dma_attrs *attrs);
+void *vb2_dma_contig_init_ctx_attrs(struct device *dev, unsigned long attrs);
static inline void *vb2_dma_contig_init_ctx(struct device *dev)
  {
-       return vb2_dma_contig_init_ctx_attrs(dev, NULL);
+       return vb2_dma_contig_init_ctx_attrs(dev, 0);
  }
void vb2_dma_contig_cleanup_ctx(void *alloc_ctx);

Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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