On Thu, May 27, 2021 at 11:26:42AM -0500, Jason Ekstrand wrote:
> This means that the proto-context needs to grow support for engine
> configuration information as well as setparam logic. Fortunately, we'll
> be deleting a lot of setparam logic on the primary context shortly so it
> will hopefully balance out.
>
> There's an extra bit of fun here when it comes to setting SSEU and the
> way it interacts with PARAM_ENGINES. Unfortunately, thanks to
> SET_CONTEXT_PARAM and not being allowed to pick the order in which we
> handle certain parameters, we have think about those interactions.
>
> v2 (Daniel Vetter):
> - Add a proto_context_free_user_engines helper
> - Comment on SSEU in the commit message
> - Use proto_context_set_persistence in set_proto_ctx_param
>
> Signed-off-by: Jason Ekstrand <ja...@jlekstrand.net>
> ---
> drivers/gpu/drm/i915/gem/i915_gem_context.c | 552 +++++++++++++++++-
> .../gpu/drm/i915/gem/i915_gem_context_types.h | 58 ++
> 2 files changed, 588 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c
> b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> index cf7c281977a3e..d68c111bc824a 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> @@ -191,10 +191,24 @@ static int validate_priority(struct drm_i915_private
> *i915,
> return 0;
> }
>
> +static void proto_context_free_user_engines(struct i915_gem_proto_context
> *pc)
> +{
> + int i;
> +
> + if (pc->user_engines) {
> + for (i = 0; i < pc->num_user_engines; i++)
> + kfree(pc->user_engines[i].siblings);
> + kfree(pc->user_engines);
> + }
> + pc->user_engines = NULL;
> + pc->num_user_engines = -1;
> +}
> +
> static void proto_context_close(struct i915_gem_proto_context *pc)
> {
> if (pc->vm)
> i915_vm_put(pc->vm);
> + proto_context_free_user_engines(pc);
> kfree(pc);
> }
>
> @@ -211,7 +225,7 @@ static int proto_context_set_persistence(struct
> drm_i915_private *i915,
> if (!i915->params.enable_hangcheck)
> return -EINVAL;
>
> - __set_bit(UCONTEXT_PERSISTENCE, &pc->user_flags);
> + pc->user_flags |= BIT(UCONTEXT_PERSISTENCE);
> } else {
> /* To cancel a context we use "preempt-to-idle" */
> if (!(i915->caps.scheduler & I915_SCHEDULER_CAP_PREEMPTION))
> @@ -233,7 +247,7 @@ static int proto_context_set_persistence(struct
> drm_i915_private *i915,
> if (!intel_has_reset_engine(&i915->gt))
> return -ENODEV;
>
> - __clear_bit(UCONTEXT_PERSISTENCE, &pc->user_flags);
> + pc->user_flags &= ~BIT(UCONTEXT_PERSISTENCE);
Squashed into wrong patch I think. Also the one right above.
> }
>
> return 0;
> @@ -248,6 +262,9 @@ proto_context_create(struct drm_i915_private *i915,
> unsigned int flags)
> if (!pc)
> return ERR_PTR(-ENOMEM);
>
> + pc->num_user_engines = -1;
> + pc->user_engines = NULL;
If you go with my proto_context_reset_user_engines() suggestion below you
could use that here too. It's overkill, but it makes the code a bit
clearer in what it does I think.
> +
> if (HAS_FULL_PPGTT(i915)) {
> struct i915_ppgtt *ppgtt;
>
> @@ -261,9 +278,8 @@ proto_context_create(struct drm_i915_private *i915,
> unsigned int flags)
> pc->vm = &ppgtt->vm;
> }
>
> - pc->user_flags = 0;
> - __set_bit(UCONTEXT_BANNABLE, &pc->user_flags);
> - __set_bit(UCONTEXT_RECOVERABLE, &pc->user_flags);
> + pc->user_flags = BIT(UCONTEXT_BANNABLE) |
> + BIT(UCONTEXT_RECOVERABLE);
Same here.
> proto_context_set_persistence(i915, pc, true);
> pc->sched.priority = I915_PRIORITY_NORMAL;
>
> @@ -282,6 +298,429 @@ proto_context_create(struct drm_i915_private *i915,
> unsigned int flags)
> return err;
> }
>
> +static int set_proto_ctx_vm(struct drm_i915_file_private *fpriv,
> + struct i915_gem_proto_context *pc,
> + const struct drm_i915_gem_context_param *args)
> +{
> + struct i915_address_space *vm;
> +
> + if (args->size)
> + return -EINVAL;
> +
> + if (!pc->vm)
I got confused by this and then realized it's checking for
HAS_FULL_PPGTT(). I wonder whether we should lock this down more with
runtime checks, or at least have a comment that ctx->vm is only set for
HAS_FULL_PPGTT.
If you concur I'd do the kerneldoc warning that this is tied to full
ppgtt, switch this check to HAS_FULL_PPGTT() and maybe do a
WARN_ON(!!ctx->vm == HAS_FULL_PPGTT());
in the context destroy (not proto context destroy). Or drop this
suggestion if you feel like this is all obvious.
> + return -ENODEV;
> +
> + if (upper_32_bits(args->value))
> + return -ENOENT;
> +
> + vm = i915_gem_vm_lookup(fpriv, args->value);
> + if (!vm)
> + return -ENOENT;
> +
> + i915_vm_put(pc->vm);
> + pc->vm = vm;
> +
> + return 0;
> +}
> +
> +struct set_proto_ctx_engines {
> + struct drm_i915_private *i915;
> + unsigned num_engines;
> + struct i915_gem_proto_engine *engines;
> +};
> +
> +static int
> +set_proto_ctx_engines_balance(struct i915_user_extension __user *base,
> + void *data)
> +{
> + struct i915_context_engines_load_balance __user *ext =
> + container_of_user(base, typeof(*ext), base);
> + const struct set_proto_ctx_engines *set = data;
> + struct drm_i915_private *i915 = set->i915;
> + struct intel_engine_cs **siblings;
> + u16 num_siblings, idx;
> + unsigned int n;
> + int err;
> +
> + if (!HAS_EXECLISTS(i915))
> + return -ENODEV;
> +
> + if (intel_uc_uses_guc_submission(&i915->gt.uc))
> + return -ENODEV; /* not implement yet */
> +
> + if (get_user(idx, &ext->engine_index))
> + return -EFAULT;
> +
> + if (idx >= set->num_engines) {
> + drm_dbg(&i915->drm, "Invalid placement value, %d >= %d\n",
> + idx, set->num_engines);
> + return -EINVAL;
> + }
> +
> + idx = array_index_nospec(idx, set->num_engines);
> + if (set->engines[idx].type != I915_GEM_ENGINE_TYPE_INVALID) {
> + drm_dbg(&i915->drm,
> + "Invalid placement[%d], already occupied\n", idx);
> + return -EEXIST;
> + }
> +
> + if (get_user(num_siblings, &ext->num_siblings))
> + return -EFAULT;
> +
> + err = check_user_mbz(&ext->flags);
> + if (err)
> + return err;
> +
> + err = check_user_mbz(&ext->mbz64);
> + if (err)
> + return err;
> +
> + if (num_siblings == 0)
> + return 0;
> +
> + siblings = kmalloc_array(num_siblings, sizeof(*siblings), GFP_KERNEL);
> + if (!siblings)
> + return -ENOMEM;
> +
> + for (n = 0; n < num_siblings; n++) {
> + struct i915_engine_class_instance ci;
> +
> + if (copy_from_user(&ci, &ext->engines[n], sizeof(ci))) {
> + err = -EFAULT;
> + goto err_siblings;
> + }
> +
> + siblings[n] = intel_engine_lookup_user(i915,
> + ci.engine_class,
> + ci.engine_instance);
> + if (!siblings[n]) {
> + drm_dbg(&i915->drm,
> + "Invalid sibling[%d]: { class:%d, inst:%d }\n",
> + n, ci.engine_class, ci.engine_instance);
> + err = -EINVAL;
> + goto err_siblings;
> + }
> + }
> +
> + if (num_siblings == 1) {
> + set->engines[idx].type = I915_GEM_ENGINE_TYPE_PHYSICAL;
> + set->engines[idx].engine = siblings[0];
> + kfree(siblings);
> + } else {
> + set->engines[idx].type = I915_GEM_ENGINE_TYPE_BALANCED;
> + set->engines[idx].num_siblings = num_siblings;
> + set->engines[idx].siblings = siblings;
> + }
> +
> + return 0;
> +
> +err_siblings:
> + kfree(siblings);
> +
> + return err;
> +}
> +
> +static int
> +set_proto_ctx_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_proto_ctx_engines *set = data;
> + struct drm_i915_private *i915 = set->i915;
> + struct i915_engine_class_instance ci;
> + struct intel_engine_cs *master;
> + u16 idx, num_bonds;
> + int err, n;
> +
> + if (get_user(idx, &ext->virtual_index))
> + return -EFAULT;
> +
> + if (idx >= set->num_engines) {
> + drm_dbg(&i915->drm,
> + "Invalid index for virtual engine: %d >= %d\n",
> + idx, set->num_engines);
> + return -EINVAL;
> + }
> +
> + idx = array_index_nospec(idx, set->num_engines);
> + if (set->engines[idx].type == I915_GEM_ENGINE_TYPE_INVALID) {
> + drm_dbg(&i915->drm, "Invalid engine at %d\n", idx);
> + return -EINVAL;
> + }
> +
> + if (set->engines[idx].type != I915_GEM_ENGINE_TYPE_PHYSICAL) {
> + drm_dbg(&i915->drm,
> + "Bonding with virtual engines not allowed\n");
> + return -EINVAL;
> + }
> +
> + 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(i915,
> + ci.engine_class,
> + ci.engine_instance);
> + if (!master) {
> + drm_dbg(&i915->drm,
> + "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(i915,
> + ci.engine_class,
> + ci.engine_instance);
> + if (!bond) {
> + drm_dbg(&i915->drm,
> + "Unrecognised engine[%d] for bonding: {
> class:%d, instance: %d }\n",
> + n, ci.engine_class, ci.engine_instance);
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static const i915_user_extension_fn set_proto_ctx_engines_extensions[] = {
> + [I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE] = set_proto_ctx_engines_balance,
> + [I915_CONTEXT_ENGINES_EXT_BOND] = set_proto_ctx_engines_bond,
> +};
> +
> +static int set_proto_ctx_engines(struct drm_i915_file_private *fpriv,
> + struct i915_gem_proto_context *pc,
> + const struct drm_i915_gem_context_param *args)
> +{
> + struct drm_i915_private *i915 = fpriv->dev_priv;
> + struct set_proto_ctx_engines set = { .i915 = i915 };
> + struct i915_context_param_engines __user *user =
> + u64_to_user_ptr(args->value);
> + unsigned int n;
> + u64 extensions;
> + int err;
> +
> + if (!args->size) {
> + proto_context_free_user_engines(pc);
> + memset(&pc->legacy_rcs_sseu, 0, sizeof(pc->legacy_rcs_sseu));
Hm I wonder whether we shouldn't put this into the cleanup helper, and
then maybe call it proto_context_reset_user_engines()? I think that makes
the entire user engines vs sseu flow a notch clearer again.
> + return 0;
> + }
> +
> + if (args->size < sizeof(*user) ||
> + !IS_ALIGNED(args->size - sizeof(*user), sizeof(*user->engines))) {
> + drm_dbg(&i915->drm, "Invalid size for engine array: %d\n",
> + args->size);
> + return -EINVAL;
> + }
> +
> + set.num_engines = (args->size - sizeof(*user)) / sizeof(*user->engines);
> + /* RING_MASK has no shift so we can use it directly here */
> + if (set.num_engines > I915_EXEC_RING_MASK + 1)
> + return -EINVAL;
> +
> + set.engines = kmalloc_array(set.num_engines, sizeof(*set.engines),
> GFP_KERNEL);
> + if (!set.engines)
> + return -ENOMEM;
> +
> + for (n = 0; n < set.num_engines; n++) {
> + struct i915_engine_class_instance ci;
> + struct intel_engine_cs *engine;
> +
> + if (copy_from_user(&ci, &user->engines[n], sizeof(ci))) {
> + kfree(set.engines);
> + return -EFAULT;
> + }
> +
> + memset(&set.engines[n], 0, sizeof(set.engines[n]));
> +
> + if (ci.engine_class == (u16)I915_ENGINE_CLASS_INVALID &&
> + ci.engine_instance == (u16)I915_ENGINE_CLASS_INVALID_NONE)
> + continue;
> +
> + engine = intel_engine_lookup_user(i915,
> + ci.engine_class,
> + ci.engine_instance);
> + if (!engine) {
> + drm_dbg(&i915->drm,
> + "Invalid engine[%d]: { class:%d, instance:%d
> }\n",
> + n, ci.engine_class, ci.engine_instance);
> + kfree(set.engines);
> + return -ENOENT;
> + }
> +
> + set.engines[n].type = I915_GEM_ENGINE_TYPE_PHYSICAL;
> + set.engines[n].engine = engine;
> + }
> +
> + err = -EFAULT;
> + if (!get_user(extensions, &user->extensions))
> + err = i915_user_extensions(u64_to_user_ptr(extensions),
> + set_proto_ctx_engines_extensions,
> +
> ARRAY_SIZE(set_proto_ctx_engines_extensions),
> + &set);
> + if (err) {
> + kfree(set.engines);
> + return err;
> + }
> +
> + proto_context_free_user_engines(pc);
> + pc->num_user_engines = set.num_engines;
> + pc->user_engines = set.engines;
> +
> + return 0;
> +}
> +
> +static int set_proto_ctx_sseu(struct drm_i915_file_private *fpriv,
> + struct i915_gem_proto_context *pc,
> + struct drm_i915_gem_context_param *args)
> +{
> + struct drm_i915_private *i915 = fpriv->dev_priv;
> + struct drm_i915_gem_context_param_sseu user_sseu;
> + struct intel_sseu *sseu;
> + int ret;
> +
> + if (args->size < sizeof(user_sseu))
> + return -EINVAL;
> +
> + if (!IS_GEN(i915, 11))
> + return -ENODEV;
> +
> + if (copy_from_user(&user_sseu, u64_to_user_ptr(args->value),
> + sizeof(user_sseu)))
> + return -EFAULT;
> +
> + if (user_sseu.rsvd)
> + return -EINVAL;
> +
> + if (user_sseu.flags & ~(I915_CONTEXT_SSEU_FLAG_ENGINE_INDEX))
> + return -EINVAL;
> +
> + if (!!(user_sseu.flags & I915_CONTEXT_SSEU_FLAG_ENGINE_INDEX) !=
> (pc->num_user_engines >= 0))
> + return -EINVAL;
> +
> + if (pc->num_user_engines >= 0) {
> + int idx = user_sseu.engine.engine_instance;
> + struct i915_gem_proto_engine *pe;
> +
> + if (idx >= pc->num_user_engines)
> + return -EINVAL;
> +
> + pe = &pc->user_engines[idx];
> +
> + /* Only render engine supports RPCS configuration. */
> + if (pe->engine->class != RENDER_CLASS)
> + return -EINVAL;
> +
> + sseu = &pe->sseu;
> + } else {
> + /* Only render engine supports RPCS configuration. */
> + if (user_sseu.engine.engine_class != I915_ENGINE_CLASS_RENDER)
> + return -EINVAL;
> +
> + /* There is only one render engine */
> + if (user_sseu.engine.engine_instance != 0)
> + return -EINVAL;
> +
> + sseu = &pc->legacy_rcs_sseu;
> + }
> +
> + ret = i915_gem_user_to_context_sseu(&i915->gt, &user_sseu, sseu);
> + if (ret)
> + return ret;
> +
> + args->size = sizeof(user_sseu);
> +
> + return 0;
> +}
> +
> +static int set_proto_ctx_param(struct drm_i915_file_private *fpriv,
> + struct i915_gem_proto_context *pc,
> + struct drm_i915_gem_context_param *args)
> +{
> + int ret = 0;
> +
> + switch (args->param) {
> + case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
> + if (args->size)
> + ret = -EINVAL;
> + else if (args->value)
> + pc->user_flags |= BIT(UCONTEXT_NO_ERROR_CAPTURE);
> + else
> + pc->user_flags &= ~BIT(UCONTEXT_NO_ERROR_CAPTURE);
> + break;
> +
> + case I915_CONTEXT_PARAM_BANNABLE:
> + if (args->size)
> + ret = -EINVAL;
> + else if (!capable(CAP_SYS_ADMIN) && !args->value)
> + ret = -EPERM;
> + else if (args->value)
> + pc->user_flags |= BIT(UCONTEXT_BANNABLE);
> + else
> + pc->user_flags &= ~BIT(UCONTEXT_BANNABLE);
> + break;
> +
> + case I915_CONTEXT_PARAM_RECOVERABLE:
> + if (args->size)
> + ret = -EINVAL;
> + else if (args->value)
> + pc->user_flags |= BIT(UCONTEXT_RECOVERABLE);
> + else
> + pc->user_flags &= ~BIT(UCONTEXT_RECOVERABLE);
> + break;
> +
> + case I915_CONTEXT_PARAM_PRIORITY:
> + ret = validate_priority(fpriv->dev_priv, args);
> + if (!ret)
> + pc->sched.priority = args->value;
> + break;
> +
> + case I915_CONTEXT_PARAM_SSEU:
> + ret = set_proto_ctx_sseu(fpriv, pc, args);
> + break;
> +
> + case I915_CONTEXT_PARAM_VM:
> + ret = set_proto_ctx_vm(fpriv, pc, args);
> + break;
> +
> + case I915_CONTEXT_PARAM_ENGINES:
> + ret = set_proto_ctx_engines(fpriv, pc, args);
> + break;
> +
> + case I915_CONTEXT_PARAM_PERSISTENCE:
> + if (args->size)
> + ret = -EINVAL;
> + proto_context_set_persistence(fpriv->dev_priv, pc, args->value);
Error handling got lost here.
> + break;
> +
> + case I915_CONTEXT_PARAM_NO_ZEROMAP:
> + case I915_CONTEXT_PARAM_BAN_PERIOD:
> + case I915_CONTEXT_PARAM_RINGSIZE:
> + default:
> + ret = -EINVAL;
> + break;
> + }
> +
> + return ret;
> +}
> +
> static struct i915_address_space *
> context_get_vm_rcu(struct i915_gem_context *ctx)
> {
> @@ -475,6 +914,56 @@ static struct i915_gem_engines *default_engines(struct
> i915_gem_context *ctx,
> return err;
> }
>
> +static struct i915_gem_engines *user_engines(struct i915_gem_context *ctx,
> + unsigned int num_engines,
> + struct i915_gem_proto_engine *pe)
> +{
> + struct i915_gem_engines *e, *err;
> + unsigned int n;
> +
> + e = alloc_engines(num_engines);
> + for (n = 0; n < num_engines; n++) {
> + struct intel_context *ce;
> + int ret;
> +
> + switch (pe[n].type) {
> + case I915_GEM_ENGINE_TYPE_PHYSICAL:
> + ce = intel_context_create(pe[n].engine);
> + break;
> +
> + case I915_GEM_ENGINE_TYPE_BALANCED:
> + ce = intel_execlists_create_virtual(pe[n].siblings,
> + pe[n].num_siblings);
> + break;
> +
> + case I915_GEM_ENGINE_TYPE_INVALID:
> + default:
> + GEM_WARN_ON(pe[n].type != I915_GEM_ENGINE_TYPE_INVALID);
> + continue;
> + }
> +
> + if (IS_ERR(ce)) {
> + err = ERR_CAST(ce);
> + goto free_engines;
> + }
> +
> + e->engines[n] = ce;
> +
> + ret = intel_context_set_gem(ce, ctx, pe->sseu);
> + if (ret) {
> + err = ERR_PTR(ret);
> + goto free_engines;
> + }
> + }
> + e->num_engines = num_engines;
> +
> + return e;
> +
> +free_engines:
> + free_engines(e);
> + return err;
> +}
> +
> void i915_gem_context_release(struct kref *ref)
> {
> struct i915_gem_context *ctx = container_of(ref, typeof(*ctx), ref);
> @@ -779,7 +1268,6 @@ __create_context(struct drm_i915_private *i915,
> {
> struct i915_gem_context *ctx;
> struct i915_gem_engines *e;
> - struct intel_sseu null_sseu = {};
> int err;
> int i;
>
> @@ -797,7 +1285,7 @@ __create_context(struct drm_i915_private *i915,
> INIT_LIST_HEAD(&ctx->stale.engines);
>
> mutex_init(&ctx->engines_mutex);
> - e = default_engines(ctx, null_sseu);
> + e = default_engines(ctx, pc->legacy_rcs_sseu);
> if (IS_ERR(e)) {
> err = PTR_ERR(e);
> goto err_free;
> @@ -916,6 +1404,24 @@ i915_gem_create_context(struct drm_i915_private *i915,
> mutex_unlock(&ctx->mutex);
> }
>
> + if (pc->num_user_engines >= 0) {
> + struct i915_gem_engines *engines;
> +
> + engines = user_engines(ctx, pc->num_user_engines,
> + pc->user_engines);
> + if (IS_ERR(engines)) {
> + context_close(ctx);
> + return ERR_CAST(engines);
> + }
> +
> + mutex_lock(&ctx->engines_mutex);
> + i915_gem_context_set_user_engines(ctx);
> + engines = rcu_replace_pointer(ctx->engines, engines, 1);
> + mutex_unlock(&ctx->engines_mutex);
> +
> + free_engines(engines);
> + }
> +
> if (pc->single_timeline) {
> ret = drm_syncobj_create(&ctx->syncobj,
> DRM_SYNCOBJ_CREATE_SIGNALED,
> @@ -1950,7 +2456,7 @@ static int ctx_setparam(struct drm_i915_file_private
> *fpriv,
> }
>
> struct create_ext {
> - struct i915_gem_context *ctx;
> + struct i915_gem_proto_context *pc;
> struct drm_i915_file_private *fpriv;
> };
>
> @@ -1965,7 +2471,7 @@ static int create_setparam(struct i915_user_extension
> __user *ext, void *data)
> if (local.param.ctx_id)
> return -EINVAL;
>
> - return ctx_setparam(arg->fpriv, arg->ctx, &local.param);
> + return set_proto_ctx_param(arg->fpriv, arg->pc, &local.param);
> }
>
> static int invalid_ext(struct i915_user_extension __user *ext, void *data)
> @@ -1988,7 +2494,7 @@ int i915_gem_context_create_ioctl(struct drm_device
> *dev, void *data,
> {
> struct drm_i915_private *i915 = to_i915(dev);
> struct drm_i915_gem_context_create_ext *args = data;
> - struct i915_gem_proto_context *pc;
> + struct i915_gem_context *ctx;
> struct create_ext ext_data;
> int ret;
> u32 id;
> @@ -2011,25 +2517,27 @@ int i915_gem_context_create_ioctl(struct drm_device
> *dev, void *data,
> return -EIO;
> }
>
> - pc = proto_context_create(i915, args->flags);
> - if (IS_ERR(pc))
> - return PTR_ERR(pc);
> -
> - ext_data.ctx = i915_gem_create_context(i915, pc);
> - proto_context_close(pc);
> - if (IS_ERR(ext_data.ctx))
> - return PTR_ERR(ext_data.ctx);
> + ext_data.pc = proto_context_create(i915, args->flags);
> + if (IS_ERR(ext_data.pc))
> + return PTR_ERR(ext_data.pc);
>
> if (args->flags & I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS) {
> ret = i915_user_extensions(u64_to_user_ptr(args->extensions),
> create_extensions,
> ARRAY_SIZE(create_extensions),
> &ext_data);
> - if (ret)
> - goto err_ctx;
> + if (ret) {
> + proto_context_close(ext_data.pc);
> + return ret;
> + }
> }
>
> - ret = gem_context_register(ext_data.ctx, ext_data.fpriv, &id);
> + ctx = i915_gem_create_context(i915, ext_data.pc);
> + proto_context_close(ext_data.pc);
> + if (IS_ERR(ctx))
> + return PTR_ERR(ctx);
> +
> + ret = gem_context_register(ctx, ext_data.fpriv, &id);
> if (ret < 0)
> goto err_ctx;
>
> @@ -2039,7 +2547,7 @@ int i915_gem_context_create_ioctl(struct drm_device
> *dev, void *data,
> return 0;
>
> err_ctx:
> - context_close(ext_data.ctx);
> + context_close(ctx);
> return ret;
> }
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
> b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
> index 0bf337b6d89ac..2ac341f805c8f 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
> @@ -66,6 +66,55 @@ struct i915_gem_engines_iter {
> const struct i915_gem_engines *engines;
> };
>
> +/**
> + * enum i915_gem_engine_type - Describes the type of an i915_gem_proto_engine
> + */
> +enum i915_gem_engine_type {
> + /** @I915_GEM_ENGINE_TYPE_INVALID: An invalid engine */
> + I915_GEM_ENGINE_TYPE_INVALID = 0,
> +
> + /** @I915_GEM_ENGINE_TYPE_PHYSICAL: A single physical engine */
> + I915_GEM_ENGINE_TYPE_PHYSICAL,
> +
> + /** @I915_GEM_ENGINE_TYPE_BALANCED: A load-balanced engine set */
> + I915_GEM_ENGINE_TYPE_BALANCED,
> +};
> +
> +/**
> + * struct i915_gem_proto_engine - prototype engine
> + *
> + * This struct describes an engine that a context may contain. Engines
> + * have three types:
> + *
> + * - I915_GEM_ENGINE_TYPE_INVALID: Invalid engines can be created but they
> + * show up as a NULL in i915_gem_engines::engines[i] and any attempt to
> + * use them by the user results in -EINVAL. They are also useful during
> + * proto-context construction because the client may create invalid
> + * engines and then set them up later as bonded engines.
s/bonded/virtual/ because we have a few classes of different virtual
engines. Especially once we add the parallel engine as a proper virtual
engine class.
> + *
> + * - I915_GEM_ENGINE_TYPE_PHYSICAL: A single physical engine, described by
> + * i915_gem_proto_engine::engine.
> + *
> + * - I915_GEM_ENGINE_TYPE_BALANCED: A load-balanced engine set, described
> + * i915_gem_proto_engine::num_siblings and
> i915_gem_proto_engine::siblings.
> + */
> +struct i915_gem_proto_engine {
> + /** @type: Type of this engine */
> + enum i915_gem_engine_type type;
> +
> + /** @engine: Engine, for physical */
> + struct intel_engine_cs *engine;
> +
> + /** @num_siblings: Number of balanced siblings */
> + unsigned int num_siblings;
> +
> + /** @siblings: Balanced siblings */
> + struct intel_engine_cs **siblings;
> +
> + /** @sseu: Client-set SSEU parameters */
> + struct intel_sseu sseu;
> +};
> +
> /**
> * struct i915_gem_proto_context - prototype context
> *
> @@ -84,6 +133,15 @@ struct i915_gem_proto_context {
> /** @sched: See i915_gem_context::sched */
> struct i915_sched_attr sched;
>
> + /** @num_user_engines: Number of user-specified engines or -1 */
> + int num_user_engines;
> +
> + /** @user_engines: User-specified engines */
> + struct i915_gem_proto_engine *user_engines;
> +
> + /** @sseu: Client-set SSEU parameters for the legacy RCS */
> + struct intel_sseu legacy_rcs_sseu;
> +
> /** @single_timeline: See See i915_gem_context::syncobj */
> bool single_timeline;
> };
> --
> 2.31.1
I didn't do a full review of the creation code, I checked that last time.
Just what changed. With the remaining nits and bits addressed:
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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