On 29/11/2022 07:26, Niranjana Vishwanathapura wrote:
Support dump capture of persistent mappings upon user request.
Signed-off-by: Brian Welty <brian.welty@xxxxxxxxx>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
---
.../drm/i915/gem/i915_gem_vm_bind_object.c | 11 +++++++++++
drivers/gpu/drm/i915/gt/intel_gtt.c | 3 +++
drivers/gpu/drm/i915/gt/intel_gtt.h | 5 +++++
drivers/gpu/drm/i915/i915_gpu_error.c | 19 +++++++++++++++++++
drivers/gpu/drm/i915/i915_vma.c | 1 +
drivers/gpu/drm/i915/i915_vma_types.h | 2 ++
include/uapi/drm/i915_drm.h | 3 ++-
7 files changed, 43 insertions(+), 1 deletion(-)
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..50969613daf6 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 +88,11 @@ static void i915_gem_vm_bind_remove(struct i915_vma *vma, bool release_obj)
{
lockdep_assert_held(&vma->vm->vm_bind_lock);
+ spin_lock(&vma->vm->vm_capture_lock);
+ if (!list_empty(&vma->vm_capture_link))
+ list_del_init(&vma->vm_capture_link);
+ spin_unlock(&vma->vm->vm_capture_lock);
+
spin_lock(&vma->vm->vm_rebind_lock);
if (!list_empty(&vma->vm_rebind_link))
list_del_init(&vma->vm_rebind_link);
@@ -357,6 +362,12 @@ static int i915_gem_vm_bind_obj(struct i915_address_space *vm,
continue;
}
+ if (va->flags & I915_GEM_VM_BIND_CAPTURE) {
+ spin_lock(&vm->vm_capture_lock);
+ list_add_tail(&vma->vm_capture_link, &vm->vm_capture_list);
+ spin_unlock(&vm->vm_capture_lock);
+ }
+
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 ebf6830574a0..bdabe13fc30e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -297,6 +297,9 @@ 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);
+
+ INIT_LIST_HEAD(&vm->vm_capture_list);
+ spin_lock_init(&vm->vm_capture_lock);
}
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 87e5b6568a00..8e4ddd073348 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -281,6 +281,11 @@ struct i915_address_space {
/** @root_obj: root object for dma-resv sharing by private objects */
struct drm_i915_gem_object *root_obj;
+ /* @vm_capture_list: list of vm captures */
+ struct list_head vm_capture_list;
+ /* @vm_capture_lock: protects vm_capture_list */
+ spinlock_t vm_capture_lock;
+
/* 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..3b2b12a739f7 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;
+
+ spin_lock(&vm->vm_capture_lock);
Does it make sense to move this into the eb3 submission stage, like we
do for eb2? IIRC the gfp flags here are quite limiting due to
potentially being in a fence critical section. If we can use
rq->capture_list for eb3, we shouldn't need to change much here?
Also there is the existing CONFIG_DRM_I915_CAPTURE_ERROR. Should we take
that into account?
+ /* 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");
+ spin_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,
@@ -1471,6 +1487,9 @@ capture_user(struct intel_engine_capture_vma *capture,
capture = capture_vma_snapshot(capture, c->vma_res, gfp,
"user");
+ capture = capture_user_vm(capture, rq->context->vm,
+ GFP_NOWAIT | __GFP_NOWARN);
And this should maybe use the passed in gfp?
+
return capture;
}
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 68a9ac77b4f2..0244864e94f7 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -248,6 +248,7 @@ 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);
+ INIT_LIST_HEAD(&vma->vm_capture_link);
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 90471dc0b235..10ae9f739d57 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -309,6 +309,8 @@ 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;
+ /* @vm_capture_link: link to the captureable VMA list */
+ struct list_head vm_capture_link;
/** 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..0744651ad5b0 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -3930,7 +3930,8 @@ struct drm_i915_gem_vm_bind {
* Note that @fence carries its own flags.
*/
__u64 flags;
-#define __I915_GEM_VM_BIND_UNKNOWN_FLAGS (~0ull)
+#define I915_GEM_VM_BIND_CAPTURE (1 << 0)
1ull << 0
Worried about what the value of UNKNOWN_FLAGS might be otherwise? Also
needs some kernel-doc.
+#define __I915_GEM_VM_BIND_UNKNOWN_FLAGS (-(I915_GEM_VM_BIND_CAPTURE << 1))
/** @rsvd: Reserved, MBZ */
__u64 rsvd[2];
