[Intel-gfx] [PATCH 15/16] drm/i915/vm_bind: userptr dma-resv changes
Niranjana Vishwanathapura
niranjana.vishwanathapura at intel.com
Wed Sep 28 06:19:17 UTC 2022
For persistent (vm_bind) vmas of userptr BOs, handle the user
page pinning by using the i915_gem_object_userptr_submit_init()
/done() functions
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
---
.../gpu/drm/i915/gem/i915_gem_execbuffer3.c | 99 +++++++++++++++++++
drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 17 ++++
.../drm/i915/gem/i915_gem_vm_bind_object.c | 16 +++
drivers/gpu/drm/i915/gt/intel_gtt.c | 2 +
drivers/gpu/drm/i915/gt/intel_gtt.h | 4 +
drivers/gpu/drm/i915/i915_vma_types.h | 2 +
6 files changed, 140 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c
index 1aeeff5e8540..f9e6ae0c8b8b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer3.c
@@ -19,6 +19,7 @@
#include "i915_gem_vm_bind.h"
#include "i915_trace.h"
+#define __EXEC3_USERPTR_USED BIT_ULL(34)
#define __EXEC3_HAS_PIN BIT_ULL(33)
#define __EXEC3_ENGINE_PINNED BIT_ULL(32)
#define __EXEC3_INTERNAL_FLAGS (~0ull << 32)
@@ -141,6 +142,21 @@ static void eb_scoop_unbound_vma_all(struct i915_address_space *vm)
{
struct i915_vma *vma, *vn;
+#ifdef CONFIG_MMU_NOTIFIER
+ /**
+ * Move all invalidated userptr vmas back into vm_bind_list so that
+ * they are looked up and revalidated.
+ */
+ spin_lock(&vm->userptr_invalidated_lock);
+ list_for_each_entry_safe(vma, vn, &vm->userptr_invalidated_list,
+ userptr_invalidated_link) {
+ list_del_init(&vma->userptr_invalidated_link);
+ if (!list_empty(&vma->vm_bind_link))
+ list_move_tail(&vma->vm_bind_link, &vm->vm_bind_list);
+ }
+ spin_unlock(&vm->userptr_invalidated_lock);
+#endif
+
/**
* Move all unbound vmas back into vm_bind_list so that they are
* revalidated.
@@ -154,10 +170,47 @@ static void eb_scoop_unbound_vma_all(struct i915_address_space *vm)
spin_unlock(&vm->vm_rebind_lock);
}
+static int eb_lookup_persistent_userptr_vmas(struct i915_execbuffer *eb)
+{
+ struct i915_address_space *vm = eb->context->vm;
+ struct i915_vma *last_vma = NULL;
+ struct i915_vma *vma;
+ int err;
+
+ lockdep_assert_held(&vm->vm_bind_lock);
+
+ list_for_each_entry(vma, &vm->vm_bind_list, vm_bind_link) {
+ if (!i915_gem_object_is_userptr(vma->obj))
+ continue;
+
+ err = i915_gem_object_userptr_submit_init(vma->obj);
+ if (err)
+ return err;
+
+ /**
+ * The above submit_init() call does the object unbind and
+ * hence adds vma into vm_rebind_list. Remove it from that
+ * list as it is already scooped for revalidation.
+ */
+ spin_lock(&vm->vm_rebind_lock);
+ if (!list_empty(&vma->vm_rebind_link))
+ list_del_init(&vma->vm_rebind_link);
+ spin_unlock(&vm->vm_rebind_lock);
+
+ last_vma = vma;
+ }
+
+ if (last_vma)
+ eb->args->flags |= __EXEC3_USERPTR_USED;
+
+ return 0;
+}
+
static int eb_lookup_vma_all(struct i915_execbuffer *eb)
{
unsigned int i, current_batch = 0;
struct i915_vma *vma;
+ int err = 0;
for (i = 0; i < eb->num_batches; i++) {
vma = eb_find_vma(eb->context->vm, eb->batch_addresses[i]);
@@ -170,6 +223,10 @@ static int eb_lookup_vma_all(struct i915_execbuffer *eb)
eb_scoop_unbound_vma_all(eb->context->vm);
+ err = eb_lookup_persistent_userptr_vmas(eb);
+ if (err)
+ return err;
+
return 0;
}
@@ -327,15 +384,57 @@ static void eb_move_all_persistent_vma_to_active(struct i915_execbuffer *eb)
static int eb_move_to_gpu(struct i915_execbuffer *eb)
{
+ int err = 0;
+
lockdep_assert_held(&eb->context->vm->vm_bind_lock);
assert_object_held(eb->context->vm->root_obj);
eb_move_all_persistent_vma_to_active(eb);
+#ifdef CONFIG_MMU_NOTIFIER
+ /* Check for further userptr invalidations */
+ spin_lock(&eb->context->vm->userptr_invalidated_lock);
+ if (!list_empty(&eb->context->vm->userptr_invalidated_list))
+ err = -EAGAIN;
+ spin_unlock(&eb->context->vm->userptr_invalidated_lock);
+
+ if (!err && (eb->args->flags & __EXEC3_USERPTR_USED)) {
+ struct i915_vma *vma;
+
+ lockdep_assert_held(&eb->context->vm->vm_bind_lock);
+ assert_object_held(eb->context->vm->root_obj);
+
+ read_lock(&eb->i915->mm.notifier_lock);
+ list_for_each_entry(vma, &eb->context->vm->vm_bind_list,
+ vm_bind_link) {
+ if (!i915_gem_object_is_userptr(vma->obj))
+ continue;
+
+ err = i915_gem_object_userptr_submit_done(vma->obj);
+ if (err)
+ break;
+ }
+
+ read_unlock(&eb->i915->mm.notifier_lock);
+ }
+#endif
+
+ if (unlikely(err))
+ goto err_skip;
+
/* Unconditionally flush any chipset caches (for streaming writes). */
intel_gt_chipset_flush(eb->gt);
return 0;
+
+err_skip:
+ for_each_batch_create_order(eb) {
+ if (!eb->requests[i])
+ break;
+
+ i915_request_set_error_once(eb->requests[i], err);
+ }
+ return err;
}
static int eb_request_submit(struct i915_execbuffer *eb,
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 8423df021b71..c0869f102f28 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -63,6 +63,7 @@ static bool i915_gem_userptr_invalidate(struct mmu_interval_notifier *mni,
{
struct drm_i915_gem_object *obj = container_of(mni, struct drm_i915_gem_object, userptr.notifier);
struct drm_i915_private *i915 = to_i915(obj->base.dev);
+ struct i915_vma *vma;
long r;
if (!mmu_notifier_range_blockable(range))
@@ -85,6 +86,22 @@ static bool i915_gem_userptr_invalidate(struct mmu_interval_notifier *mni,
if (current->flags & PF_EXITING)
return true;
+ /**
+ * Add persistent vmas into userptr_invalidated list for relookup
+ * and revalidation.
+ */
+ spin_lock(&obj->vma.lock);
+ list_for_each_entry(vma, &obj->vma.list, obj_link) {
+ if (!i915_vma_is_persistent(vma))
+ continue;
+
+ spin_lock(&vma->vm->userptr_invalidated_lock);
+ list_add_tail(&vma->userptr_invalidated_link,
+ &vma->vm->userptr_invalidated_list);
+ spin_unlock(&vma->vm->userptr_invalidated_lock);
+ }
+ spin_unlock(&obj->vma.lock);
+
/* we will unbind on next submission, still have userptr pins */
r = dma_resv_wait_timeout(obj->base.resv, DMA_RESV_USAGE_BOOKKEEP, false,
MAX_SCHEDULE_TIMEOUT);
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 d5c222aa3902..f69dcd1ce390 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
@@ -288,6 +288,12 @@ static int i915_gem_vm_bind_obj(struct i915_address_space *vm,
goto put_obj;
}
+ if (i915_gem_object_is_userptr(obj)) {
+ ret = i915_gem_object_userptr_submit_init(obj);
+ if (ret)
+ goto put_obj;
+ }
+
ret = mutex_lock_interruptible(&vm->vm_bind_lock);
if (ret)
goto put_obj;
@@ -319,6 +325,16 @@ static int i915_gem_vm_bind_obj(struct i915_address_space *vm,
/* Make it evictable */
__i915_vma_unpin(vma);
+#ifdef CONFIG_MMU_NOTIFIER
+ if (i915_gem_object_is_userptr(obj)) {
+ read_lock(&vm->i915->mm.notifier_lock);
+ ret = i915_gem_object_userptr_submit_done(obj);
+ read_unlock(&vm->i915->mm.notifier_lock);
+ if (ret)
+ continue;
+ }
+#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 6db31197fa87..401202391649 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -298,6 +298,8 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass)
GEM_BUG_ON(IS_ERR(vm->root_obj));
INIT_LIST_HEAD(&vm->vm_rebind_list);
spin_lock_init(&vm->vm_rebind_lock);
+ spin_lock_init(&vm->userptr_invalidated_lock);
+ INIT_LIST_HEAD(&vm->userptr_invalidated_list);
}
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 b73d35b4e05d..c3069ee42b5a 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -277,6 +277,10 @@ struct i915_address_space {
struct list_head vm_rebind_list;
/* @vm_rebind_lock: protects vm_rebound_list */
spinlock_t vm_rebind_lock;
+ /* @userptr_invalidated_list: list of invalidated userptr vmas */
+ struct list_head userptr_invalidated_list;
+ /* @userptr_invalidated_lock: protects userptr_invalidated_list */
+ spinlock_t userptr_invalidated_lock;
/* @va: tree of persistent vmas */
struct rb_root_cached va;
struct list_head non_priv_vm_bind_list;
diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h
index 5b0f04bccb0a..cc29b36afc53 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -310,6 +310,8 @@ struct i915_vma {
struct list_head non_priv_vm_bind_link;
/* @vm_rebind_link: link to vm_rebind_list and protected by vm_rebind_lock */
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;
/** Timeline fence for vm_bind completion notification */
struct {
--
2.21.0.rc0.32.g243a4c7e27
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