diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_context.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_context.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 68db6b28e606..5d2f8ba92b59 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -1504,8 +1504,92 @@ out_siblings: return err; } +static int +set_engines__bond(struct i915_user_extension __user *base, void *data) +{ + struct i915_context_engines_bond __user *ext = + container_of_user(base, typeof(*ext), base); + const struct set_engines *set = data; + struct i915_engine_class_instance ci; + struct intel_engine_cs *virtual; + struct intel_engine_cs *master; + u16 idx, num_bonds; + int err, n; + + if (get_user(idx, &ext->virtual_index)) + return -EFAULT; + + if (idx >= set->engines->num_engines) { + DRM_DEBUG("Invalid index for virtual engine: %d >= %d\n", + idx, set->engines->num_engines); + return -EINVAL; + } + + idx = array_index_nospec(idx, set->engines->num_engines); + if (!set->engines->engines[idx]) { + DRM_DEBUG("Invalid engine at %d\n", idx); + return -EINVAL; + } + virtual = set->engines->engines[idx]->engine; + + err = check_user_mbz(&ext->flags); + if (err) + return err; + + for (n = 0; n < ARRAY_SIZE(ext->mbz64); n++) { + err = check_user_mbz(&ext->mbz64[n]); + if (err) + return err; + } + + if (copy_from_user(&ci, &ext->master, sizeof(ci))) + return -EFAULT; + + master = intel_engine_lookup_user(set->ctx->i915, + ci.engine_class, ci.engine_instance); + if (!master) { + DRM_DEBUG("Unrecognised master engine: { class:%u, instance:%u }\n", + ci.engine_class, ci.engine_instance); + return -EINVAL; + } + + if (get_user(num_bonds, &ext->num_bonds)) + return -EFAULT; + + for (n = 0; n < num_bonds; n++) { + struct intel_engine_cs *bond; + + if (copy_from_user(&ci, &ext->engines[n], sizeof(ci))) + return -EFAULT; + + bond = intel_engine_lookup_user(set->ctx->i915, + ci.engine_class, + ci.engine_instance); + if (!bond) { + DRM_DEBUG("Unrecognised engine[%d] for bonding: { class:%d, instance: %d }\n", + n, ci.engine_class, ci.engine_instance); + return -EINVAL; + } + + /* + * A non-virtual engine has no siblings to choose between; and + * a submit fence will always be directed to the one engine. + */ + if (intel_engine_is_virtual(virtual)) { + err = intel_virtual_engine_attach_bond(virtual, + master, + bond); + if (err) + return err; + } + } + + return 0; +} + static const i915_user_extension_fn set_engines__extensions[] = { [I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE] = set_engines__load_balance, + [I915_CONTEXT_ENGINES_EXT_BOND] = set_engines__bond, }; static int |