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drm: Wrap drm_mm_node.hole_follows 

Insulate users from changes to the internal hole tracking within
struct drm_mm_node by using an accessor for hole_follows.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
[danvet: resolve conflicts in i915_vma.c]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2016-12-22 08:36:37 +00:00 committed by Daniel Vetter
parent 3fa489dabe
commit 3f85fb3462
4 changed files with 37 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/drm_mm.c
View File

@ -323,7 +323,7 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
}
hole = list_last_entry(&hole->node_list, typeof(*hole), node_list);
if (!hole->hole_follows)
if (!drm_mm_hole_follows(hole))
return -ENOSPC;
adj_start = hole_start = __drm_mm_hole_node_start(hole);
@ -408,7 +408,7 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
u64 adj_start = hole_start;
u64 adj_end = hole_end;
DRM_MM_BUG_ON(!hole_node->hole_follows || node->allocated);
DRM_MM_BUG_ON(!drm_mm_hole_follows(hole_node) || node->allocated);
if (adj_start < start)
adj_start = start;
@ -523,16 +523,16 @@ void drm_mm_remove_node(struct drm_mm_node *node)
prev_node =
list_entry(node->node_list.prev, struct drm_mm_node, node_list);
if (node->hole_follows) {
if (drm_mm_hole_follows(node)) {
DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) ==
__drm_mm_hole_node_end(node));
list_del(&node->hole_stack);
} else
} else {
DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) !=
__drm_mm_hole_node_end(node));
}
if (!prev_node->hole_follows) {
if (!drm_mm_hole_follows(prev_node)) {
prev_node->hole_follows = 1;
list_add(&prev_node->hole_stack, &mm->hole_stack);
} else

4
drivers/gpu/drm/i915/i915_vma.c
View File

@ -320,11 +320,11 @@ bool i915_gem_valid_gtt_space(struct i915_vma *vma,
return true;
other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
if (other->allocated && !other->hole_follows && other->color != cache_level)
if (other->allocated && !drm_mm_hole_follows(other) && other->color != cache_level)
return false;
other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
if (other->allocated && !drm_mm_hole_follows(gtt_space) && other->color != cache_level)
return false;
return true;

18
drivers/gpu/drm/selftests/test-drm_mm.c
View File

@ -63,7 +63,7 @@ static bool assert_no_holes(const struct drm_mm *mm)
}
drm_mm_for_each_node(hole, mm) {
if (hole->hole_follows) {
if (drm_mm_hole_follows(hole)) {
pr_err("Hole follows node, expected none!\n");
return false;
}
@ -125,7 +125,7 @@ static bool assert_continuous(const struct drm_mm *mm, u64 size)
return false;
}
if (node->hole_follows) {
if (drm_mm_hole_follows(node)) {
pr_err("node[%ld] is followed by a hole!\n", n);
return false;
}
@ -828,7 +828,8 @@ static bool assert_contiguous_in_range(struct drm_mm *mm,
return false;
}
if (node->hole_follows && drm_mm_hole_node_end(node) < end) {
if (drm_mm_hole_follows(node) &&
drm_mm_hole_node_end(node) < end) {
pr_err("node %d is followed by a hole!\n", n);
return false;
}
@ -1337,11 +1338,12 @@ static int evict_something(struct drm_mm *mm,
err = -EINVAL;
}
if (!assert_node(&tmp, mm, size, alignment, 0) || tmp.hole_follows) {
if (!assert_node(&tmp, mm, size, alignment, 0) ||
drm_mm_hole_follows(&tmp)) {
pr_err("Inserted did not fill the eviction hole: size=%lld [%d], align=%d [rem=%lld], start=%llx, hole-follows?=%d\n",
tmp.size, size,
alignment, misalignment(&tmp, alignment),
tmp.start, tmp.hole_follows);
tmp.start, drm_mm_hole_follows(&tmp));
err = -EINVAL;
}
@ -1618,7 +1620,7 @@ static int igt_topdown(void *ignored)
goto out;
}
if (nodes[n].hole_follows) {
if (drm_mm_hole_follows(&nodes[n])) {
pr_err("hole after topdown insert %d, start=%llx\n, size=%u",
n, nodes[n].start, size);
goto out;
@ -1650,7 +1652,7 @@ static int igt_topdown(void *ignored)
goto out;
}
if (node->hole_follows) {
if (drm_mm_hole_follows(node)) {
pr_err("hole after topdown insert %d/%d, start=%llx\n",
m, n, node->start);
goto out;
@ -1705,7 +1707,7 @@ static void separate_adjacent_colors(const struct drm_mm_node *node,
static bool colors_abutt(const struct drm_mm_node *node)
{
if (!node->hole_follows &&
if (!drm_mm_hole_follows(node) &&
list_next_entry(node, node_list)->allocated) {
pr_err("colors abutt; %ld [%llx + %llx] is next to %ld [%llx + %llx]!\n",
node->color, node->start, node->size,

22
include/drm/drm_mm.h
View File

@ -155,6 +155,22 @@ static inline bool drm_mm_initialized(const struct drm_mm *mm)
return mm->hole_stack.next;
}
/**
* drm_mm_hole_follows - checks whether a hole follows this node
* @node: drm_mm_node to check
*
* Holes are embedded into the drm_mm using the tail of a drm_mm_node.
* If you wish to know whether a hole follows this particular node,
* query this function.
*
* Returns:
* True if a hole follows the @node.
*/
static inline bool drm_mm_hole_follows(const struct drm_mm_node *node)
{
return node->hole_follows;
}
static inline u64 __drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
{
return hole_node->start + hole_node->size;
@ -166,14 +182,14 @@ static inline u64 __drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
*
* This is useful for driver-specific debug dumpers. Otherwise drivers should
* not inspect holes themselves. Drivers must check first whether a hole indeed
* follows by looking at node->hole_follows.
* follows by looking at drm_mm_hole_follows()
*
* Returns:
* Start of the subsequent hole.
*/
static inline u64 drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
{
DRM_MM_BUG_ON(!hole_node->hole_follows);
DRM_MM_BUG_ON(!drm_mm_hole_follows(hole_node));
return __drm_mm_hole_node_start(hole_node);
}
@ -188,7 +204,7 @@ static inline u64 __drm_mm_hole_node_end(const struct drm_mm_node *hole_node)
*
* This is useful for driver-specific debug dumpers. Otherwise drivers should
* not inspect holes themselves. Drivers must check first whether a hole indeed
* follows by looking at node->hole_follows.
* follows by looking at drm_mm_hole_follows().
*
* Returns:
* End of the subsequent hole.