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-rw-r--r--drivers/gpu/drm/omapdrm/omap_gem.c125
-rw-r--r--drivers/gpu/drm/omapdrm/omap_gem.h3
-rw-r--r--drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c5
3 files changed, 73 insertions, 60 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c
index bb12cb49c92a..41c1a6d83b2b 100644
--- a/drivers/gpu/drm/omapdrm/omap_gem.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem.c
@@ -38,7 +38,7 @@ struct omap_gem_object {
/** roll applied when mapping to DMM */
u32 roll;
- /** protects dma_addr_cnt, block, pages, dma_addrs and vaddr */
+ /** protects pin_cnt, block, pages, dma_addrs and vaddr */
struct mutex lock;
/**
@@ -50,24 +50,24 @@ struct omap_gem_object {
* - buffers imported from dmabuf (with the OMAP_BO_MEM_DMABUF flag set)
* if they are physically contiguous (when sgt->orig_nents == 1)
*
- * - buffers mapped through the TILER when dma_addr_cnt is not zero, in
- * which case the DMA address points to the TILER aperture
+ * - buffers mapped through the TILER when pin_cnt is not zero, in which
+ * case the DMA address points to the TILER aperture
*
* Physically contiguous buffers have their DMA address equal to the
* physical address as we don't remap those buffers through the TILER.
*
* Buffers mapped to the TILER have their DMA address pointing to the
- * TILER aperture. As TILER mappings are refcounted (through
- * dma_addr_cnt) the DMA address must be accessed through omap_gem_pin()
- * to ensure that the mapping won't disappear unexpectedly. References
- * must be released with omap_gem_unpin().
+ * TILER aperture. As TILER mappings are refcounted (through pin_cnt)
+ * the DMA address must be accessed through omap_gem_pin() to ensure
+ * that the mapping won't disappear unexpectedly. References must be
+ * released with omap_gem_unpin().
*/
dma_addr_t dma_addr;
/**
- * # of users of dma_addr
+ * # of users
*/
- refcount_t dma_addr_cnt;
+ refcount_t pin_cnt;
/**
* If the buffer has been imported from a dmabuf the OMAP_DB_DMABUF flag
@@ -812,32 +812,28 @@ int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr)
mutex_lock(&omap_obj->lock);
- if (!omap_gem_is_contiguous(omap_obj) && priv->has_dmm) {
- if (refcount_read(&omap_obj->dma_addr_cnt) == 0) {
+ if (!omap_gem_is_contiguous(omap_obj)) {
+ if (refcount_read(&omap_obj->pin_cnt) == 0) {
- refcount_set(&omap_obj->dma_addr_cnt, 1);
+ refcount_set(&omap_obj->pin_cnt, 1);
ret = omap_gem_attach_pages(obj);
if (ret)
goto fail;
- ret = omap_gem_pin_tiler(obj);
- if (ret)
- goto fail;
+ if (priv->has_dmm) {
+ ret = omap_gem_pin_tiler(obj);
+ if (ret)
+ goto fail;
+ }
} else {
- refcount_inc(&omap_obj->dma_addr_cnt);
+ refcount_inc(&omap_obj->pin_cnt);
}
-
- if (dma_addr)
- *dma_addr = omap_obj->dma_addr;
- } else if (omap_gem_is_contiguous(omap_obj)) {
- if (dma_addr)
- *dma_addr = omap_obj->dma_addr;
- } else {
- ret = -EINVAL;
- goto fail;
}
+ if (dma_addr)
+ *dma_addr = omap_obj->dma_addr;
+
fail:
mutex_unlock(&omap_obj->lock);
@@ -856,27 +852,29 @@ static void omap_gem_unpin_locked(struct drm_gem_object *obj)
struct omap_gem_object *omap_obj = to_omap_bo(obj);
int ret;
- if (omap_gem_is_contiguous(omap_obj) || !priv->has_dmm)
+ if (omap_gem_is_contiguous(omap_obj))
return;
- if (refcount_dec_and_test(&omap_obj->dma_addr_cnt)) {
+ if (refcount_dec_and_test(&omap_obj->pin_cnt)) {
if (omap_obj->sgt) {
sg_free_table(omap_obj->sgt);
kfree(omap_obj->sgt);
omap_obj->sgt = NULL;
}
- ret = tiler_unpin(omap_obj->block);
- if (ret) {
- dev_err(obj->dev->dev,
- "could not unpin pages: %d\n", ret);
- }
- ret = tiler_release(omap_obj->block);
- if (ret) {
- dev_err(obj->dev->dev,
- "could not release unmap: %d\n", ret);
+ if (priv->has_dmm) {
+ ret = tiler_unpin(omap_obj->block);
+ if (ret) {
+ dev_err(obj->dev->dev,
+ "could not unpin pages: %d\n", ret);
+ }
+ ret = tiler_release(omap_obj->block);
+ if (ret) {
+ dev_err(obj->dev->dev,
+ "could not release unmap: %d\n", ret);
+ }
+ omap_obj->dma_addr = 0;
+ omap_obj->block = NULL;
}
- omap_obj->dma_addr = 0;
- omap_obj->block = NULL;
}
}
@@ -909,7 +907,7 @@ int omap_gem_rotated_dma_addr(struct drm_gem_object *obj, u32 orient,
mutex_lock(&omap_obj->lock);
- if ((refcount_read(&omap_obj->dma_addr_cnt) > 0) && omap_obj->block &&
+ if ((refcount_read(&omap_obj->pin_cnt) > 0) && omap_obj->block &&
(omap_obj->flags & OMAP_BO_TILED_MASK)) {
*dma_addr = tiler_tsptr(omap_obj->block, orient, x, y);
ret = 0;
@@ -977,7 +975,8 @@ int omap_gem_put_pages(struct drm_gem_object *obj)
return 0;
}
-struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj)
+struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj,
+ enum dma_data_direction dir)
{
struct omap_gem_object *omap_obj = to_omap_bo(obj);
dma_addr_t addr;
@@ -1002,28 +1001,44 @@ struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj)
goto err_unpin;
}
- if (omap_obj->flags & OMAP_BO_TILED_MASK) {
- enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
+ if (addr) {
+ if (omap_obj->flags & OMAP_BO_TILED_MASK) {
+ enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
- len = omap_obj->width << (int)fmt;
- count = omap_obj->height;
- stride = tiler_stride(fmt, 0);
+ len = omap_obj->width << (int)fmt;
+ count = omap_obj->height;
+ stride = tiler_stride(fmt, 0);
+ } else {
+ len = obj->size;
+ count = 1;
+ stride = 0;
+ }
} else {
- len = obj->size;
- count = 1;
- stride = 0;
+ count = obj->size >> PAGE_SHIFT;
}
ret = sg_alloc_table(sgt, count, GFP_KERNEL);
if (ret)
goto err_free;
- for_each_sg(sgt->sgl, sg, count, i) {
- sg_set_page(sg, phys_to_page(addr), len, offset_in_page(addr));
- sg_dma_address(sg) = addr;
- sg_dma_len(sg) = len;
+ /* this must be after omap_gem_pin() to ensure we have pages attached */
+ omap_gem_dma_sync_buffer(obj, dir);
+
+ if (addr) {
+ for_each_sg(sgt->sgl, sg, count, i) {
+ sg_set_page(sg, phys_to_page(addr), len,
+ offset_in_page(addr));
+ sg_dma_address(sg) = addr;
+ sg_dma_len(sg) = len;
- addr += stride;
+ addr += stride;
+ }
+ } else {
+ for_each_sg(sgt->sgl, sg, count, i) {
+ sg_set_page(sg, omap_obj->pages[i], PAGE_SIZE, 0);
+ sg_dma_address(sg) = omap_obj->dma_addrs[i];
+ sg_dma_len(sg) = PAGE_SIZE;
+ }
}
omap_obj->sgt = sgt;
@@ -1133,7 +1148,7 @@ void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d",
omap_obj->flags, obj->name, kref_read(&obj->refcount),
off, &omap_obj->dma_addr,
- refcount_read(&omap_obj->dma_addr_cnt),
+ refcount_read(&omap_obj->pin_cnt),
omap_obj->vaddr, omap_obj->roll);
if (omap_obj->flags & OMAP_BO_TILED_MASK) {
@@ -1196,7 +1211,7 @@ static void omap_gem_free_object(struct drm_gem_object *obj)
mutex_lock(&omap_obj->lock);
/* The object should not be pinned. */
- WARN_ON(refcount_read(&omap_obj->dma_addr_cnt) > 0);
+ WARN_ON(refcount_read(&omap_obj->pin_cnt) > 0);
if (omap_obj->pages) {
if (omap_obj->flags & OMAP_BO_MEM_DMABUF)
diff --git a/drivers/gpu/drm/omapdrm/omap_gem.h b/drivers/gpu/drm/omapdrm/omap_gem.h
index 19209e319663..4d4488939f6b 100644
--- a/drivers/gpu/drm/omapdrm/omap_gem.h
+++ b/drivers/gpu/drm/omapdrm/omap_gem.h
@@ -82,7 +82,8 @@ u32 omap_gem_flags(struct drm_gem_object *obj);
int omap_gem_rotated_dma_addr(struct drm_gem_object *obj, u32 orient,
int x, int y, dma_addr_t *dma_addr);
int omap_gem_tiled_stride(struct drm_gem_object *obj, u32 orient);
-struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj);
+struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj,
+ enum dma_data_direction dir);
void omap_gem_put_sg(struct drm_gem_object *obj, struct sg_table *sgt);
#endif /* __OMAPDRM_GEM_H__ */
diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
index ab3fc86e7256..393f82e26927 100644
--- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c
@@ -23,13 +23,10 @@ static struct sg_table *omap_gem_map_dma_buf(
{
struct drm_gem_object *obj = attachment->dmabuf->priv;
struct sg_table *sg;
- sg = omap_gem_get_sg(obj);
+ sg = omap_gem_get_sg(obj, dir);
if (IS_ERR(sg))
return sg;
- /* this must be after omap_gem_pin() to ensure we have pages attached */
- omap_gem_dma_sync_buffer(obj, dir);
-
return sg;
}