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-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c43
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.h2
-rw-r--r--drivers/gpu/drm/i915/i915_gpu_error.c120
3 files changed, 74 insertions, 91 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 0bb4232f66bc..2d846aa39ca5 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2717,6 +2717,7 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
*/
struct i915_ggtt *ggtt = &dev_priv->ggtt;
unsigned long hole_start, hole_end;
+ struct i915_hw_ppgtt *ppgtt;
struct drm_mm_node *entry;
int ret;
@@ -2724,6 +2725,15 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
if (ret)
return ret;
+ /* Reserve a mappable slot for our lockless error capture */
+ ret = drm_mm_insert_node_in_range_generic(&ggtt->base.mm,
+ &ggtt->error_capture,
+ 4096, 0, -1,
+ 0, ggtt->mappable_end,
+ 0, 0);
+ if (ret)
+ return ret;
+
/* Clear any non-preallocated blocks */
drm_mm_for_each_hole(entry, &ggtt->base.mm, hole_start, hole_end) {
DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
@@ -2738,25 +2748,21 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
true);
if (USES_PPGTT(dev_priv) && !USES_FULL_PPGTT(dev_priv)) {
- struct i915_hw_ppgtt *ppgtt;
-
ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
- if (!ppgtt)
- return -ENOMEM;
+ if (!ppgtt) {
+ ret = -ENOMEM;
+ goto err;
+ }
ret = __hw_ppgtt_init(ppgtt, dev_priv);
- if (ret) {
- kfree(ppgtt);
- return ret;
- }
+ if (ret)
+ goto err_ppgtt;
- if (ppgtt->base.allocate_va_range)
+ if (ppgtt->base.allocate_va_range) {
ret = ppgtt->base.allocate_va_range(&ppgtt->base, 0,
ppgtt->base.total);
- if (ret) {
- ppgtt->base.cleanup(&ppgtt->base);
- kfree(ppgtt);
- return ret;
+ if (ret)
+ goto err_ppgtt_cleanup;
}
ppgtt->base.clear_range(&ppgtt->base,
@@ -2770,6 +2776,14 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
}
return 0;
+
+err_ppgtt_cleanup:
+ ppgtt->base.cleanup(&ppgtt->base);
+err_ppgtt:
+ kfree(ppgtt);
+err:
+ drm_mm_remove_node(&ggtt->error_capture);
+ return ret;
}
/**
@@ -2788,6 +2802,9 @@ void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv)
i915_gem_cleanup_stolen(&dev_priv->drm);
+ if (drm_mm_node_allocated(&ggtt->error_capture))
+ drm_mm_remove_node(&ggtt->error_capture);
+
if (drm_mm_initialized(&ggtt->base.mm)) {
intel_vgt_deballoon(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index ec78be2f8c77..bd93fb8f99d2 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -450,6 +450,8 @@ struct i915_ggtt {
bool do_idle_maps;
int mtrr;
+
+ struct drm_mm_node error_capture;
};
struct i915_hw_ppgtt {
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 159d6d7e0cee..b3b2e6c1c6c6 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -656,7 +656,7 @@ static void i915_error_object_free(struct drm_i915_error_object *obj)
return;
for (page = 0; page < obj->page_count; page++)
- kfree(obj->pages[page]);
+ free_page((unsigned long)obj->pages[page]);
kfree(obj);
}
@@ -693,98 +693,69 @@ static void i915_error_state_free(struct kref *error_ref)
kfree(error);
}
+static int compress_page(void *src, struct drm_i915_error_object *dst)
+{
+ unsigned long page;
+
+ page = __get_free_page(GFP_ATOMIC | __GFP_NOWARN);
+ if (!page)
+ return -ENOMEM;
+
+ dst->pages[dst->page_count++] = (void *)page;
+
+ memcpy((void *)page, src, PAGE_SIZE);
+ return 0;
+}
+
static struct drm_i915_error_object *
-i915_error_object_create(struct drm_i915_private *dev_priv,
+i915_error_object_create(struct drm_i915_private *i915,
struct i915_vma *vma)
{
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
- struct drm_i915_gem_object *src;
+ struct i915_ggtt *ggtt = &i915->ggtt;
+ const u64 slot = ggtt->error_capture.start;
struct drm_i915_error_object *dst;
- int num_pages;
- bool use_ggtt;
- int i = 0;
- u64 reloc_offset;
+ unsigned long num_pages;
+ struct sgt_iter iter;
+ dma_addr_t dma;
if (!vma)
return NULL;
- src = vma->obj;
- if (!src->pages)
- return NULL;
-
- num_pages = src->base.size >> PAGE_SHIFT;
-
- dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
+ num_pages = min_t(u64, vma->size, vma->obj->base.size) >> PAGE_SHIFT;
+ dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *),
+ GFP_ATOMIC | __GFP_NOWARN);
if (!dst)
return NULL;
dst->gtt_offset = vma->node.start;
dst->gtt_size = vma->node.size;
+ dst->page_count = 0;
- reloc_offset = dst->gtt_offset;
- use_ggtt = (src->cache_level == I915_CACHE_NONE &&
- (vma->flags & I915_VMA_GLOBAL_BIND) &&
- reloc_offset + num_pages * PAGE_SIZE <= ggtt->mappable_end);
-
- /* Cannot access stolen address directly, try to use the aperture */
- if (src->stolen) {
- use_ggtt = true;
-
- if (!(vma->flags & I915_VMA_GLOBAL_BIND))
- goto unwind;
-
- reloc_offset = vma->node.start;
- if (reloc_offset + num_pages * PAGE_SIZE > ggtt->mappable_end)
- goto unwind;
- }
+ for_each_sgt_dma(dma, iter, vma->pages) {
+ void __iomem *s;
+ int ret;
- /* Cannot access snooped pages through the aperture */
- if (use_ggtt && src->cache_level != I915_CACHE_NONE &&
- !HAS_LLC(dev_priv))
- goto unwind;
+ ggtt->base.insert_page(&ggtt->base, dma, slot,
+ I915_CACHE_NONE, 0);
- dst->page_count = num_pages;
- while (num_pages--) {
- void *d;
+ s = io_mapping_map_atomic_wc(&ggtt->mappable, slot);
+ ret = compress_page((void * __force)s, dst);
+ io_mapping_unmap_atomic(s);
- d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
- if (d == NULL)
+ if (ret)
goto unwind;
-
- if (use_ggtt) {
- void __iomem *s;
-
- /* Simply ignore tiling or any overlapping fence.
- * It's part of the error state, and this hopefully
- * captures what the GPU read.
- */
-
- s = io_mapping_map_atomic_wc(&ggtt->mappable,
- reloc_offset);
- memcpy_fromio(d, s, PAGE_SIZE);
- io_mapping_unmap_atomic(s);
- } else {
- struct page *page;
- void *s;
-
- page = i915_gem_object_get_page(src, i);
-
- s = kmap_atomic(page);
- memcpy(d, s, PAGE_SIZE);
- kunmap_atomic(s);
- }
-
- dst->pages[i++] = d;
- reloc_offset += PAGE_SIZE;
}
-
- return dst;
+ goto out;
unwind:
- while (i--)
- kfree(dst->pages[i]);
+ while (dst->page_count--)
+ free_page((unsigned long)dst->pages[dst->page_count]);
kfree(dst);
- return NULL;
+ dst = NULL;
+
+out:
+ ggtt->base.clear_range(&ggtt->base, slot, PAGE_SIZE, true);
+ return dst;
}
/* The error capture is special as tries to run underneath the normal
@@ -1445,9 +1416,6 @@ static int capture(void *data)
{
struct drm_i915_error_state *error = data;
- /* Ensure that what we readback from memory matches what the GPU sees */
- wbinvd();
-
i915_capture_gen_state(error->i915, error);
i915_capture_reg_state(error->i915, error);
i915_gem_record_fences(error->i915, error);
@@ -1460,9 +1428,6 @@ static int capture(void *data)
error->overlay = intel_overlay_capture_error_state(error->i915);
error->display = intel_display_capture_error_state(error->i915);
- /* And make sure we don't leave trash in the CPU cache */
- wbinvd();
-
return 0;
}
@@ -1539,7 +1504,6 @@ void i915_error_state_get(struct drm_device *dev,
if (error_priv->error)
kref_get(&error_priv->error->ref);
spin_unlock_irq(&dev_priv->gpu_error.lock);
-
}
void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.