Signed-off-by: Jason Ekstrand jason@jlekstrand.net --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 657 ++++++++++++++++-- drivers/gpu/drm/i915/gem/i915_gem_context.h | 3 + .../gpu/drm/i915/gem/i915_gem_context_types.h | 26 + .../gpu/drm/i915/gem/selftests/mock_context.c | 5 +- drivers/gpu/drm/i915/i915_drv.h | 17 +- 5 files changed, 648 insertions(+), 60 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index db9153e0f85a7..aa8e61211924f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -193,8 +193,15 @@ static int validate_priority(struct drm_i915_private *i915,
static void proto_context_close(struct i915_gem_proto_context *pc) { + int i; + if (pc->vm) i915_vm_put(pc->vm); + if (pc->user_engines) { + for (i = 0; i < pc->num_user_engines; i++) + kfree(pc->user_engines[i].siblings); + kfree(pc->user_engines); + } kfree(pc); }
@@ -274,12 +281,417 @@ proto_context_create(struct drm_i915_private *i915, unsigned int flags) proto_context_set_persistence(i915, pc, true); pc->sched.priority = I915_PRIORITY_NORMAL;
+ pc->num_user_engines = -1; + pc->user_engines = NULL; + if (flags & I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE) pc->single_timeline = true;
return pc; }
+static int proto_context_register_locked(struct drm_i915_file_private *fpriv, + struct i915_gem_proto_context *pc, + u32 *id) +{ + int ret; + void *old; + + ret = xa_alloc(&fpriv->context_xa, id, NULL, xa_limit_32b, GFP_KERNEL); + if (ret) + return ret; + + old = xa_store(&fpriv->proto_context_xa, *id, pc, GFP_KERNEL); + if (xa_is_err(old)) { + xa_erase(&fpriv->context_xa, *id); + return xa_err(old); + } + GEM_BUG_ON(old); + + return 0; +} + +static int proto_context_register(struct drm_i915_file_private *fpriv, + struct i915_gem_proto_context *pc, + u32 *id) +{ + int ret; + + mutex_lock(&fpriv->proto_context_lock); + ret = proto_context_register_locked(fpriv, pc, id); + mutex_unlock(&fpriv->proto_context_lock); + + return ret; +} + +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) + return -ENODEV; + + if (upper_32_bits(args->value)) + return -ENOENT; + + rcu_read_lock(); + vm = xa_load(&fpriv->vm_xa, args->value); + if (vm && !kref_get_unless_zero(&vm->ref)) + vm = NULL; + rcu_read_unlock(); + 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) { + kfree(pc->user_engines); + pc->num_user_engines = -1; + pc->user_engines = NULL; + return 0; + } + + BUILD_BUG_ON(!IS_ALIGNED(sizeof(*user), sizeof(*user->engines))); + if (args->size < sizeof(*user) || + !IS_ALIGNED(args->size, 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); + 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; + } + + kfree(pc->user_engines); + pc->num_user_engines = set.num_engines; + pc->user_engines = set.engines; + + 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) + set_bit(UCONTEXT_NO_ERROR_CAPTURE, &pc->user_flags); + else + clear_bit(UCONTEXT_NO_ERROR_CAPTURE, &pc->user_flags); + 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) + set_bit(UCONTEXT_BANNABLE, &pc->user_flags); + else + clear_bit(UCONTEXT_BANNABLE, &pc->user_flags); + break; + + case I915_CONTEXT_PARAM_RECOVERABLE: + if (args->size) + ret = -EINVAL; + else if (args->value) + set_bit(UCONTEXT_RECOVERABLE, &pc->user_flags); + else + clear_bit(UCONTEXT_RECOVERABLE, &pc->user_flags); + 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 = -ENOTSUPP; + 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; + else if (args->value) + set_bit(UCONTEXT_PERSISTENCE, &pc->user_flags); + else + clear_bit(UCONTEXT_PERSISTENCE, &pc->user_flags); + 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) { @@ -450,6 +862,47 @@ static struct i915_gem_engines *default_engines(struct i915_gem_context *ctx) return e; }
+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; + unsigned int n; + + e = alloc_engines(num_engines); + for (n = 0; n < num_engines; n++) { + struct intel_context *ce; + + 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)) { + __free_engines(e, n); + return ERR_CAST(ce); + } + + intel_context_set_gem(ce, ctx); + + e->engines[n] = ce; + } + e->num_engines = num_engines; + + return e; +} + void i915_gem_context_release(struct kref *ref) { struct i915_gem_context *ctx = container_of(ref, typeof(*ctx), ref); @@ -890,6 +1343,24 @@ 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, @@ -916,12 +1387,12 @@ void i915_gem_init__contexts(struct drm_i915_private *i915) init_contexts(&i915->gem.contexts); }
-static int gem_context_register(struct i915_gem_context *ctx, - struct drm_i915_file_private *fpriv, - u32 *id) +static void gem_context_register(struct i915_gem_context *ctx, + struct drm_i915_file_private *fpriv, + u32 id) { struct drm_i915_private *i915 = ctx->i915; - int ret; + void *old;
ctx->file_priv = fpriv;
@@ -930,19 +1401,12 @@ static int gem_context_register(struct i915_gem_context *ctx, current->comm, pid_nr(ctx->pid));
/* And finally expose ourselves to userspace via the idr */ - ret = xa_alloc(&fpriv->context_xa, id, ctx, xa_limit_32b, GFP_KERNEL); - if (ret) - goto err_pid; + old = xa_store(&fpriv->context_xa, id, ctx, GFP_KERNEL); + GEM_BUG_ON(old);
spin_lock(&i915->gem.contexts.lock); list_add_tail(&ctx->link, &i915->gem.contexts.list); spin_unlock(&i915->gem.contexts.lock); - - return 0; - -err_pid: - put_pid(fetch_and_zero(&ctx->pid)); - return ret; }
int i915_gem_context_open(struct drm_i915_private *i915, @@ -952,9 +1416,12 @@ int i915_gem_context_open(struct drm_i915_private *i915, struct i915_gem_proto_context *pc; struct i915_gem_context *ctx; int err; - u32 id;
- xa_init_flags(&file_priv->context_xa, XA_FLAGS_ALLOC); + mutex_init(&file_priv->proto_context_lock); + xa_init_flags(&file_priv->proto_context_xa, XA_FLAGS_ALLOC); + + /* 0 reserved for the default context */ + xa_init_flags(&file_priv->context_xa, XA_FLAGS_ALLOC1);
/* 0 reserved for invalid/unassigned ppgtt */ xa_init_flags(&file_priv->vm_xa, XA_FLAGS_ALLOC1); @@ -972,28 +1439,31 @@ int i915_gem_context_open(struct drm_i915_private *i915, goto err; }
- err = gem_context_register(ctx, file_priv, &id); - if (err < 0) - goto err_ctx; + gem_context_register(ctx, file_priv, 0);
- GEM_BUG_ON(id); return 0;
-err_ctx: - context_close(ctx); err: xa_destroy(&file_priv->vm_xa); xa_destroy(&file_priv->context_xa); + xa_destroy(&file_priv->proto_context_xa); + mutex_destroy(&file_priv->proto_context_lock); return err; }
void i915_gem_context_close(struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; + struct i915_gem_proto_context *pc; struct i915_address_space *vm; struct i915_gem_context *ctx; unsigned long idx;
+ xa_for_each(&file_priv->proto_context_xa, idx, pc) + proto_context_close(pc); + xa_destroy(&file_priv->proto_context_xa); + mutex_destroy(&file_priv->proto_context_lock); + xa_for_each(&file_priv->context_xa, idx, ctx) context_close(ctx); xa_destroy(&file_priv->context_xa); @@ -1918,7 +2388,7 @@ 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; };
@@ -1933,7 +2403,7 @@ 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) @@ -1951,12 +2421,71 @@ static bool client_is_banned(struct drm_i915_file_private *file_priv) return atomic_read(&file_priv->ban_score) >= I915_CLIENT_SCORE_BANNED; }
+static inline struct i915_gem_context * +__context_lookup(struct drm_i915_file_private *file_priv, u32 id) +{ + struct i915_gem_context *ctx; + + rcu_read_lock(); + ctx = xa_load(&file_priv->context_xa, id); + if (ctx && !kref_get_unless_zero(&ctx->ref)) + ctx = NULL; + rcu_read_unlock(); + + return ctx; +} + +struct i915_gem_context * +lazy_create_context_locked(struct drm_i915_file_private *file_priv, + struct i915_gem_proto_context *pc, u32 id) +{ + struct i915_gem_context *ctx; + void *old; + + ctx = i915_gem_create_context(file_priv->dev_priv, pc); + if (IS_ERR(ctx)) + return ctx; + + gem_context_register(ctx, file_priv, id); + + old = xa_erase(&file_priv->proto_context_xa, id); + GEM_BUG_ON(old != pc); + proto_context_close(pc); + + /* One for the xarray and one for the caller */ + return i915_gem_context_get(ctx); +} + +struct i915_gem_context * +i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id) +{ + struct i915_gem_proto_context *pc; + struct i915_gem_context *ctx; + + ctx = __context_lookup(file_priv, id); + if (ctx) + return ctx; + + mutex_lock(&file_priv->proto_context_lock); + /* Try one more time under the lock */ + ctx = __context_lookup(file_priv, id); + if (!ctx) { + pc = xa_load(&file_priv->proto_context_xa, id); + if (!pc) + ctx = ERR_PTR(-ENOENT); + else + ctx = lazy_create_context_locked(file_priv, pc, id); + } + mutex_unlock(&file_priv->proto_context_lock); + + return ctx; +} + int i915_gem_context_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_i915_private *i915 = to_i915(dev); struct drm_i915_gem_context_create_ext *args = data; - struct i915_gem_proto_context *pc; struct create_ext ext_data; int ret; u32 id; @@ -1979,14 +2508,9 @@ 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), @@ -1994,20 +2518,20 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data, ARRAY_SIZE(create_extensions), &ext_data); if (ret) - goto err_ctx; + goto err_pc; }
- ret = gem_context_register(ext_data.ctx, ext_data.fpriv, &id); + ret = proto_context_register(ext_data.fpriv, ext_data.pc, &id); if (ret < 0) - goto err_ctx; + goto err_pc;
args->ctx_id = id; drm_dbg(&i915->drm, "HW context %d created\n", args->ctx_id);
return 0;
-err_ctx: - context_close(ext_data.ctx); +err_pc: + proto_context_close(ext_data.pc); return ret; }
@@ -2016,6 +2540,7 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data, { struct drm_i915_gem_context_destroy *args = data; struct drm_i915_file_private *file_priv = file->driver_priv; + struct i915_gem_proto_context *pc; struct i915_gem_context *ctx;
if (args->pad != 0) @@ -2024,11 +2549,21 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data, if (!args->ctx_id) return -ENOENT;
+ mutex_lock(&file_priv->proto_context_lock); ctx = xa_erase(&file_priv->context_xa, args->ctx_id); - if (!ctx) + pc = xa_erase(&file_priv->proto_context_xa, args->ctx_id); + mutex_unlock(&file_priv->proto_context_lock); + + if (!ctx && !pc) return -ENOENT; + GEM_WARN_ON(ctx && pc); + + if (pc) + proto_context_close(pc); + + if (ctx) + context_close(ctx);
- context_close(ctx); return 0; }
@@ -2161,16 +2696,48 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data, { struct drm_i915_file_private *file_priv = file->driver_priv; struct drm_i915_gem_context_param *args = data; + struct i915_gem_proto_context *pc; struct i915_gem_context *ctx; - int ret; + int ret = 0;
- ctx = i915_gem_context_lookup(file_priv, args->ctx_id); - if (IS_ERR(ctx)) - return PTR_ERR(ctx); + ctx = __context_lookup(file_priv, args->ctx_id); + if (ctx) + goto set_ctx_param;
- ret = ctx_setparam(file_priv, ctx, args); + mutex_lock(&file_priv->proto_context_lock); + ctx = __context_lookup(file_priv, args->ctx_id); + if (ctx) + goto unlock; + + pc = xa_load(&file_priv->proto_context_xa, args->ctx_id); + if (!pc) { + ret = -ENOENT; + goto unlock; + } + + ret = set_proto_ctx_param(file_priv, pc, args); + if (ret == -ENOTSUPP) { + /* Some params, specifically SSEU, can only be set on fully + * created contexts. + */ + ret = 0; + ctx = lazy_create_context_locked(file_priv, pc, args->ctx_id); + if (IS_ERR(ctx)) { + ret = PTR_ERR(ctx); + ctx = NULL; + } + } + +unlock: + mutex_unlock(&file_priv->proto_context_lock); + +set_ctx_param: + if (!ret && ctx) + ret = ctx_setparam(file_priv, ctx, args); + + if (ctx) + i915_gem_context_put(ctx);
- i915_gem_context_put(ctx); return ret; }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.h b/drivers/gpu/drm/i915/gem/i915_gem_context.h index b5c908f3f4f22..20411db84914a 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.h @@ -133,6 +133,9 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data, int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data, struct drm_file *file);
+struct i915_gem_context * +i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id); + static inline struct i915_gem_context * i915_gem_context_get(struct i915_gem_context *ctx) { 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 a42c429f94577..067ea3030ac91 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h @@ -46,6 +46,26 @@ struct i915_gem_engines_iter { const struct i915_gem_engines *engines; };
+enum i915_gem_engine_type { + I915_GEM_ENGINE_TYPE_INVALID = 0, + I915_GEM_ENGINE_TYPE_PHYSICAL, + I915_GEM_ENGINE_TYPE_BALANCED, +}; + +struct i915_gem_proto_engine { + /** @type: Type of this engine */ + enum i915_gem_engine_type type; + + /** @num_siblings: Engine, for physical */ + struct intel_engine_cs *engine; + + /** @num_siblings: Number of balanced siblings */ + unsigned int num_siblings; + + /** @num_siblings: Balanced siblings */ + struct intel_engine_cs **siblings; +}; + /** * struct i915_gem_proto_context - prototype context * @@ -64,6 +84,12 @@ 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; + + /** @num_user_engines: User-specified engines */ + struct i915_gem_proto_engine *user_engines; + bool single_timeline; };
diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_context.c b/drivers/gpu/drm/i915/gem/selftests/mock_context.c index e0f512ef7f3c6..32cf2103828f9 100644 --- a/drivers/gpu/drm/i915/gem/selftests/mock_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/mock_context.c @@ -80,6 +80,7 @@ void mock_init_contexts(struct drm_i915_private *i915) struct i915_gem_context * live_context(struct drm_i915_private *i915, struct file *file) { + struct drm_i915_file_private *fpriv = to_drm_file(file)->driver_priv; struct i915_gem_proto_context *pc; struct i915_gem_context *ctx; int err; @@ -96,10 +97,12 @@ live_context(struct drm_i915_private *i915, struct file *file)
i915_gem_context_set_no_error_capture(ctx);
- err = gem_context_register(ctx, to_drm_file(file)->driver_priv, &id); + err = xa_alloc(&fpriv->context_xa, &id, NULL, xa_limit_32b, GFP_KERNEL); if (err < 0) goto err_ctx;
+ gem_context_register(ctx, fpriv, id); + return ctx;
err_ctx: diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 004ed0e59c999..365c042529d72 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -200,6 +200,9 @@ struct drm_i915_file_private { struct rcu_head rcu; };
+ struct mutex proto_context_lock; + struct xarray proto_context_xa; + struct xarray context_xa; struct xarray vm_xa;
@@ -1840,20 +1843,6 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
struct dma_buf *i915_gem_prime_export(struct drm_gem_object *gem_obj, int flags);
-static inline struct i915_gem_context * -i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id) -{ - struct i915_gem_context *ctx; - - rcu_read_lock(); - ctx = xa_load(&file_priv->context_xa, id); - if (ctx && !kref_get_unless_zero(&ctx->ref)) - ctx = NULL; - rcu_read_unlock(); - - return ctx ? ctx : ERR_PTR(-ENOENT); -} - /* i915_gem_evict.c */ int __must_check i915_gem_evict_something(struct i915_address_space *vm, u64 min_size, u64 alignment,