[Intel-gfx] [PATCH 14/28] drm/i915: Take object lock in i915_ggtt_pin if ww is not set

Maarten Lankhorst
2021-10-21T10:37:24Z

i915_vma_wait_for_bind needs the vma lock held, fix the caller.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/i915_vma.c | 40 +++++++++++++++++++++++----------
1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index bacc8d68e495..2877dcd62acb 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -1348,23 +1348,15 @@ static void flush_idle_contexts(struct intel_gt *gt)
intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
}

-int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
- u32 align, unsigned int flags)
+static int __i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+ u32 align, unsigned int flags)
{
struct i915_address_space *vm = vma->vm;
int err;

- GEM_BUG_ON(!i915_vma_is_ggtt(vma));
-
-#ifdef CONFIG_LOCKDEP
- WARN_ON(!ww && dma_resv_held(vma->obj->base.resv));
-#endif
-
do {
- if (ww)
- err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);
- else
- err = i915_vma_pin(vma, 0, align, flags | PIN_GLOBAL);
+ err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);
+
if (err != -ENOSPC) {
if (!err) {
err = i915_vma_wait_for_bind(vma);
@@ -1383,6 +1375,30 @@ int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
} while (1);
}

+int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+ u32 align, unsigned int flags)
+{
+ struct i915_gem_ww_ctx _ww;
+ int err;
+
+ GEM_BUG_ON(!i915_vma_is_ggtt(vma));
+
+ if (ww)
+ return __i915_ggtt_pin(vma, ww, align, flags);
+
+#ifdef CONFIG_LOCKDEP
+ WARN_ON(dma_resv_held(vma->obj->base.resv));
+#endif
+
+ for_i915_gem_ww(&_ww, err, true) {
+ err = i915_gem_object_lock(vma->obj, &_ww);
+ if (!err)
+ err = __i915_ggtt_pin(vma, &_ww, align, flags);
+ }
+
+ return err;
+}
+
static void __vma_close(struct i915_vma *vma, struct intel_gt *gt)
{
/*
--
2.33.0