It's never been used by any real userspace. It's used by IGT as a
short-cut for sharing VMs and other stuff between contexts.
Signed-off-by: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 217 +-------------------
include/uapi/drm/i915_drm.h | 16 +-
2 files changed, 6 insertions(+), 227 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index ca37d93ef5e78..92256f4e50764 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -2103,225 +2103,14 @@ static int create_setparam(struct i915_user_extension __user *ext, void *data)
return ctx_setparam(arg->fpriv, arg->ctx, &local.param);
}
-static int copy_ring_size(struct intel_context *dst,
- struct intel_context *src)
+static int invalid_ext(struct i915_user_extension __user *ext, void *data)
{
- long sz;
-
- sz = intel_context_get_ring_size(src);
- if (sz < 0)
- return sz;
-
- return intel_context_set_ring_size(dst, sz);
-}
-
-static int clone_engines(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- struct i915_gem_engines *clone, *e;
- bool user_engines;
- unsigned long n;
-
- e = __context_engines_await(src, &user_engines);
- if (!e)
- return -ENOENT;
-
- clone = alloc_engines(e->num_engines);
- if (!clone)
- goto err_unlock;
-
- for (n = 0; n < e->num_engines; n++) {
- struct intel_engine_cs *engine;
-
- if (!e->engines[n]) {
- clone->engines[n] = NULL;
- continue;
- }
- engine = e->engines[n]->engine;
-
- /*
- * Virtual engines are singletons; they can only exist
- * inside a single context, because they embed their
- * HW context... As each virtual context implies a single
- * timeline (each engine can only dequeue a single request
- * at any time), it would be surprising for two contexts
- * to use the same engine. So let's create a copy of
- * the virtual engine instead.
- */
- if (intel_engine_is_virtual(engine))
- clone->engines[n] =
- intel_execlists_clone_virtual(engine);
- else
- clone->engines[n] = intel_context_create(engine);
- if (IS_ERR_OR_NULL(clone->engines[n])) {
- __free_engines(clone, n);
- goto err_unlock;
- }
-
- intel_context_set_gem(clone->engines[n], dst);
-
- /* Copy across the preferred ringsize */
- if (copy_ring_size(clone->engines[n], e->engines[n])) {
- __free_engines(clone, n + 1);
- goto err_unlock;
- }
- }
- clone->num_engines = n;
- i915_sw_fence_complete(&e->fence);
-
- /* Serialised by constructor */
- engines_idle_release(dst, rcu_replace_pointer(dst->engines, clone, 1));
- if (user_engines)
- i915_gem_context_set_user_engines(dst);
- else
- i915_gem_context_clear_user_engines(dst);
- return 0;
-
-err_unlock:
- i915_sw_fence_complete(&e->fence);
- return -ENOMEM;
-}
-
-static int clone_flags(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- dst->user_flags = src->user_flags;
- return 0;
-}
-
-static int clone_schedattr(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- dst->sched = src->sched;
- return 0;
-}
-
-static int clone_sseu(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- struct i915_gem_engines *e = i915_gem_context_lock_engines(src);
- struct i915_gem_engines *clone;
- unsigned long n;
- int err;
-
- /* no locking required; sole access under constructor*/
- clone = __context_engines_static(dst);
- if (e->num_engines != clone->num_engines) {
- err = -EINVAL;
- goto unlock;
- }
-
- for (n = 0; n < e->num_engines; n++) {
- struct intel_context *ce = e->engines[n];
-
- if (clone->engines[n]->engine->class != ce->engine->class) {
- /* Must have compatible engine maps! */
- err = -EINVAL;
- goto unlock;
- }
-
- /* serialises with set_sseu */
- err = intel_context_lock_pinned(ce);
- if (err)
- goto unlock;
-
- clone->engines[n]->sseu = ce->sseu;
- intel_context_unlock_pinned(ce);
- }
-
- err = 0;
-unlock:
- i915_gem_context_unlock_engines(src);
- return err;
-}
-
-static int clone_timeline(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- if (src->timeline)
- __assign_timeline(dst, src->timeline);
-
- return 0;
-}
-
-static int clone_vm(struct i915_gem_context *dst,
- struct i915_gem_context *src)
-{
- struct i915_address_space *vm;
- int err = 0;
-
- if (!rcu_access_pointer(src->vm))
- return 0;
-
- rcu_read_lock();
- vm = context_get_vm_rcu(src);
- rcu_read_unlock();
-
- if (!mutex_lock_interruptible(&dst->mutex)) {
- __assign_ppgtt(dst, vm);
- mutex_unlock(&dst->mutex);
- } else {
- err = -EINTR;
- }
-
- i915_vm_put(vm);
- return err;
-}
-
-static int create_clone(struct i915_user_extension __user *ext, void *data)
-{
- static int (* const fn[])(struct i915_gem_context *dst,
- struct i915_gem_context *src) = {
-#define MAP(x, y) [ilog2(I915_CONTEXT_CLONE_##x)] = y
- MAP(ENGINES, clone_engines),
- MAP(FLAGS, clone_flags),
- MAP(SCHEDATTR, clone_schedattr),
- MAP(SSEU, clone_sseu),
- MAP(TIMELINE, clone_timeline),
- MAP(VM, clone_vm),
-#undef MAP
- };
- struct drm_i915_gem_context_create_ext_clone local;
- const struct create_ext *arg = data;
- struct i915_gem_context *dst = arg->ctx;
- struct i915_gem_context *src;
- int err, bit;
-
- if (copy_from_user(&local, ext, sizeof(local)))
- return -EFAULT;
-
- BUILD_BUG_ON(GENMASK(BITS_PER_TYPE(local.flags) - 1, ARRAY_SIZE(fn)) !=
- I915_CONTEXT_CLONE_UNKNOWN);
-
- if (local.flags & I915_CONTEXT_CLONE_UNKNOWN)
- return -EINVAL;
-
- if (local.rsvd)
- return -EINVAL;
-
- rcu_read_lock();
- src = __i915_gem_context_lookup_rcu(arg->fpriv, local.clone_id);
- rcu_read_unlock();
- if (!src)
- return -ENOENT;
-
- GEM_BUG_ON(src == dst);
-
- for (bit = 0; bit < ARRAY_SIZE(fn); bit++) {
- if (!(local.flags & BIT(bit)))
- continue;
-
- err = fn[bit](dst, src);
- if (err)
- return err;
- }
-
- return 0;
+ return -EINVAL;
}
static const i915_user_extension_fn create_extensions[] = {
[I915_CONTEXT_CREATE_EXT_SETPARAM] = create_setparam,
- [I915_CONTEXT_CREATE_EXT_CLONE] = create_clone,
+ [I915_CONTEXT_CREATE_EXT_CLONE] = invalid_ext,
};
static bool client_is_banned(struct drm_i915_file_private *file_priv)
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index ddc47bbf48b6d..0ed1b88afedd5 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1853,20 +1853,10 @@ struct drm_i915_gem_context_create_ext_setparam {
struct drm_i915_gem_context_param param;
};
-struct drm_i915_gem_context_create_ext_clone {
+/* This API has been removed. On the off chance someone somewhere has
+ * attempted to use it, never re-use this extension number.
+ */
#define I915_CONTEXT_CREATE_EXT_CLONE 1
- struct i915_user_extension base;
- __u32 clone_id;
- __u32 flags;
-#define I915_CONTEXT_CLONE_ENGINES (1u << 0)
-#define I915_CONTEXT_CLONE_FLAGS (1u << 1)
-#define I915_CONTEXT_CLONE_SCHEDATTR (1u << 2)
-#define I915_CONTEXT_CLONE_SSEU (1u << 3)
-#define I915_CONTEXT_CLONE_TIMELINE (1u << 4)
-#define I915_CONTEXT_CLONE_VM (1u << 5)
-#define I915_CONTEXT_CLONE_UNKNOWN -(I915_CONTEXT_CLONE_VM << 1)
- __u64 rsvd;
-};
struct drm_i915_gem_context_destroy {
__u32 ctx_id;
--
2.29.2
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