Support dump capture of persistent mappings upon user request.
Capture of a mapping is requested with the VM_BIND ioctl and
processed during the GPU error handling, thus not adding any
additional latency to the submission path.
A list of persistent vmas requiring capture is maintained
instead of a list of vma resources. This allows for no
additional handling around eviction.
v2: enable with CONFIG_DRM_I915_CAPTURE_ERROR, remove gfp
overwrite, add kernel-doc and expand commit message
Signed-off-by: Brian Welty <brian.welty@xxxxxxxxx>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
---
.../gpu/drm/i915/gem/i915_gem_vm_bind_object.c | 13 +++++++++++++
drivers/gpu/drm/i915/gt/intel_gtt.c | 5 +++++
drivers/gpu/drm/i915/gt/intel_gtt.h | 7 +++++++
drivers/gpu/drm/i915/i915_gpu_error.c | 18 +++++++++++++++++-
drivers/gpu/drm/i915/i915_vma.c | 4 ++++
drivers/gpu/drm/i915/i915_vma_types.h | 4 ++++
include/uapi/drm/i915_drm.h | 9 +++++++--
7 files changed, 57 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c
index 78e7c0642c5f..562a67a988f2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c
@@ -88,6 +88,12 @@ static void i915_gem_vm_bind_remove(struct i915_vma *vma, bool release_obj)
{
lockdep_assert_held(&vma->vm->vm_bind_lock);
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ mutex_lock(&vma->vm->vm_capture_lock);
+ if (!list_empty(&vma->vm_capture_link))
+ list_del_init(&vma->vm_capture_link);
+ mutex_unlock(&vma->vm->vm_capture_lock);
+#endif
spin_lock(&vma->vm->vm_rebind_lock);
if (!list_empty(&vma->vm_rebind_link))
list_del_init(&vma->vm_rebind_link);
@@ -357,6 +363,13 @@ static int i915_gem_vm_bind_obj(struct i915_address_space *vm,
continue;
}
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ if (va->flags & I915_GEM_VM_BIND_CAPTURE) {
+ mutex_lock(&vm->vm_capture_lock);
+ list_add_tail(&vma->vm_capture_link, &vm->vm_capture_list);
+ mutex_unlock(&vm->vm_capture_lock);
+ }
+#endif
list_add_tail(&vma->vm_bind_link, &vm->vm_bound_list);
i915_vm_bind_it_insert(vma, &vm->va);
if (!obj->priv_root)
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index 2e4c9fabf3b8..103ca55222be 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -297,6 +297,11 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
spin_lock_init(&vm->vm_rebind_lock);
spin_lock_init(&vm->userptr_invalidated_lock);
INIT_LIST_HEAD(&vm->userptr_invalidated_list);
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ INIT_LIST_HEAD(&vm->vm_capture_list);
+ mutex_init(&vm->vm_capture_lock);
+#endif
}
void *__px_vaddr(struct drm_i915_gem_object *p)
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
index 620b4e020a9f..7f69e1d4fb5e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -281,6 +281,13 @@ struct i915_address_space {
/** @root_obj: root object for dma-resv sharing by private objects */
struct drm_i915_gem_object *root_obj;
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ /* @vm_capture_list: list of vm captures */
+ struct list_head vm_capture_list;
+ /* @vm_capture_lock: protects vm_capture_list */
+ struct mutex vm_capture_lock;
+#endif
+
/* Global GTT */
bool is_ggtt:1;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 9d5d5a397b64..76b2834ce958 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1460,6 +1460,22 @@ capture_vma(struct intel_engine_capture_vma *next,
return next;
}
+static struct intel_engine_capture_vma *
+capture_user_vm(struct intel_engine_capture_vma *capture,
+ struct i915_address_space *vm, gfp_t gfp)
+{
+ struct i915_vma *vma;
+
+ mutex_lock(&vm->vm_capture_lock);
+ /* vma->resource must be valid here as persistent vmas are bound */
+ list_for_each_entry(vma, &vm->vm_capture_list, vm_capture_link)
+ capture = capture_vma_snapshot(capture, vma->resource,
+ gfp, "user");
+ mutex_unlock(&vm->vm_capture_lock);
+
+ return capture;
+}
+
static struct intel_engine_capture_vma *
capture_user(struct intel_engine_capture_vma *capture,
const struct i915_request *rq,
@@ -1471,7 +1487,7 @@ capture_user(struct intel_engine_capture_vma *capture,
capture = capture_vma_snapshot(capture, c->vma_res, gfp,
"user");
- return capture;
+ return capture_user_vm(capture, rq->context->vm, gfp);
}
static void add_vma(struct intel_engine_coredump *ee,
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index d092a86123ae..9be8aa448874 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -248,6 +248,10 @@ vma_create(struct drm_i915_gem_object *obj,
INIT_LIST_HEAD(&vma->non_priv_vm_bind_link);
INIT_LIST_HEAD(&vma->vm_rebind_link);
INIT_LIST_HEAD(&vma->userptr_invalidated_link);
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ INIT_LIST_HEAD(&vma->vm_capture_link);
+#endif
return vma;
err_unlock:
diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h
index 89f9854a6f69..c4fd61d51ce6 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -310,6 +310,10 @@ struct i915_vma {
struct list_head vm_rebind_link; /* Link in vm_rebind_list */
/** @userptr_invalidated_link: link to the vm->userptr_invalidated_list */
struct list_head userptr_invalidated_link;
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+ /* @vm_capture_link: link to the captureable VMA list */
+ struct list_head vm_capture_link;
+#endif
/** Timeline fence for vm_bind completion notification */
struct {
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index b9167f950327..5fde6020e339 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -3925,12 +3925,17 @@ struct drm_i915_gem_vm_bind {
__u64 length;
/**
- * @flags: Currently reserved, MBZ.
+ * @flags: Supported flags are:
+ *
+ * I915_GEM_VM_BIND_CAPTURE:
+ * Capture this mapping in the dump upon GPU error.
+ * CONFIG_DRM_I915_CAPTURE_ERROR should be enabled for valid capture.
*
* Note that @fence carries its own flags.
*/
__u64 flags;
-#define __I915_GEM_VM_BIND_UNKNOWN_FLAGS (~0ull)
+#define I915_GEM_VM_BIND_CAPTURE (1ull << 0)
+#define __I915_GEM_VM_BIND_UNKNOWN_FLAGS (-(I915_GEM_VM_BIND_CAPTURE << 1))
/** @rsvd: Reserved, MBZ */
__u64 rsvd[2];
--
2.21.0.rc0.32.g243a4c7e27
