diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_exec_queue.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_exec_queue.c | 961 |
1 files changed, 961 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c new file mode 100644 index 000000000000..bcfc4127c7c5 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_exec_queue.c @@ -0,0 +1,961 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "xe_exec_queue.h" + +#include <linux/nospec.h> + +#include <drm/drm_device.h> +#include <drm/drm_file.h> +#include <drm/xe_drm.h> + +#include "xe_device.h" +#include "xe_gt.h" +#include "xe_hw_engine_class_sysfs.h" +#include "xe_hw_fence.h" +#include "xe_lrc.h" +#include "xe_macros.h" +#include "xe_migrate.h" +#include "xe_pm.h" +#include "xe_ring_ops_types.h" +#include "xe_trace.h" +#include "xe_vm.h" + +enum xe_exec_queue_sched_prop { + XE_EXEC_QUEUE_JOB_TIMEOUT = 0, + XE_EXEC_QUEUE_TIMESLICE = 1, + XE_EXEC_QUEUE_PREEMPT_TIMEOUT = 2, + XE_EXEC_QUEUE_SCHED_PROP_MAX = 3, +}; + +static struct xe_exec_queue *__xe_exec_queue_create(struct xe_device *xe, + struct xe_vm *vm, + u32 logical_mask, + u16 width, struct xe_hw_engine *hwe, + u32 flags) +{ + struct xe_exec_queue *q; + struct xe_gt *gt = hwe->gt; + int err; + int i; + + /* only kernel queues can be permanent */ + XE_WARN_ON((flags & EXEC_QUEUE_FLAG_PERMANENT) && !(flags & EXEC_QUEUE_FLAG_KERNEL)); + + q = kzalloc(sizeof(*q) + sizeof(struct xe_lrc) * width, GFP_KERNEL); + if (!q) + return ERR_PTR(-ENOMEM); + + kref_init(&q->refcount); + q->flags = flags; + q->hwe = hwe; + q->gt = gt; + if (vm) + q->vm = xe_vm_get(vm); + q->class = hwe->class; + q->width = width; + q->logical_mask = logical_mask; + q->fence_irq = >->fence_irq[hwe->class]; + q->ring_ops = gt->ring_ops[hwe->class]; + q->ops = gt->exec_queue_ops; + INIT_LIST_HEAD(&q->persistent.link); + INIT_LIST_HEAD(&q->compute.link); + INIT_LIST_HEAD(&q->multi_gt_link); + + q->sched_props.timeslice_us = hwe->eclass->sched_props.timeslice_us; + q->sched_props.preempt_timeout_us = + hwe->eclass->sched_props.preempt_timeout_us; + if (q->flags & EXEC_QUEUE_FLAG_KERNEL && + q->flags & EXEC_QUEUE_FLAG_HIGH_PRIORITY) + q->sched_props.priority = XE_EXEC_QUEUE_PRIORITY_KERNEL; + else + q->sched_props.priority = XE_EXEC_QUEUE_PRIORITY_NORMAL; + + if (xe_exec_queue_is_parallel(q)) { + q->parallel.composite_fence_ctx = dma_fence_context_alloc(1); + q->parallel.composite_fence_seqno = XE_FENCE_INITIAL_SEQNO; + } + if (q->flags & EXEC_QUEUE_FLAG_VM) { + q->bind.fence_ctx = dma_fence_context_alloc(1); + q->bind.fence_seqno = XE_FENCE_INITIAL_SEQNO; + } + + for (i = 0; i < width; ++i) { + err = xe_lrc_init(q->lrc + i, hwe, q, vm, SZ_16K); + if (err) + goto err_lrc; + } + + err = q->ops->init(q); + if (err) + goto err_lrc; + + /* + * Normally the user vm holds an rpm ref to keep the device + * awake, and the context holds a ref for the vm, however for + * some engines we use the kernels migrate vm underneath which offers no + * such rpm ref, or we lack a vm. Make sure we keep a ref here, so we + * can perform GuC CT actions when needed. Caller is expected to have + * already grabbed the rpm ref outside any sensitive locks. + */ + if (!(q->flags & EXEC_QUEUE_FLAG_PERMANENT) && (q->flags & EXEC_QUEUE_FLAG_VM || !vm)) + drm_WARN_ON(&xe->drm, !xe_device_mem_access_get_if_ongoing(xe)); + + return q; + +err_lrc: + for (i = i - 1; i >= 0; --i) + xe_lrc_finish(q->lrc + i); + kfree(q); + return ERR_PTR(err); +} + +struct xe_exec_queue *xe_exec_queue_create(struct xe_device *xe, struct xe_vm *vm, + u32 logical_mask, u16 width, + struct xe_hw_engine *hwe, u32 flags) +{ + struct xe_exec_queue *q; + int err; + + if (vm) { + err = xe_vm_lock(vm, true); + if (err) + return ERR_PTR(err); + } + q = __xe_exec_queue_create(xe, vm, logical_mask, width, hwe, flags); + if (vm) + xe_vm_unlock(vm); + + return q; +} + +struct xe_exec_queue *xe_exec_queue_create_class(struct xe_device *xe, struct xe_gt *gt, + struct xe_vm *vm, + enum xe_engine_class class, u32 flags) +{ + struct xe_hw_engine *hwe, *hwe0 = NULL; + enum xe_hw_engine_id id; + u32 logical_mask = 0; + + for_each_hw_engine(hwe, gt, id) { + if (xe_hw_engine_is_reserved(hwe)) + continue; + + if (hwe->class == class) { + logical_mask |= BIT(hwe->logical_instance); + if (!hwe0) + hwe0 = hwe; + } + } + + if (!logical_mask) + return ERR_PTR(-ENODEV); + + return xe_exec_queue_create(xe, vm, logical_mask, 1, hwe0, flags); +} + +void xe_exec_queue_destroy(struct kref *ref) +{ + struct xe_exec_queue *q = container_of(ref, struct xe_exec_queue, refcount); + struct xe_exec_queue *eq, *next; + + xe_exec_queue_last_fence_put_unlocked(q); + if (!(q->flags & EXEC_QUEUE_FLAG_BIND_ENGINE_CHILD)) { + list_for_each_entry_safe(eq, next, &q->multi_gt_list, + multi_gt_link) + xe_exec_queue_put(eq); + } + + q->ops->fini(q); +} + +void xe_exec_queue_fini(struct xe_exec_queue *q) +{ + int i; + + for (i = 0; i < q->width; ++i) + xe_lrc_finish(q->lrc + i); + if (!(q->flags & EXEC_QUEUE_FLAG_PERMANENT) && (q->flags & EXEC_QUEUE_FLAG_VM || !q->vm)) + xe_device_mem_access_put(gt_to_xe(q->gt)); + if (q->vm) + xe_vm_put(q->vm); + + kfree(q); +} + +void xe_exec_queue_assign_name(struct xe_exec_queue *q, u32 instance) +{ + switch (q->class) { + case XE_ENGINE_CLASS_RENDER: + sprintf(q->name, "rcs%d", instance); + break; + case XE_ENGINE_CLASS_VIDEO_DECODE: + sprintf(q->name, "vcs%d", instance); + break; + case XE_ENGINE_CLASS_VIDEO_ENHANCE: + sprintf(q->name, "vecs%d", instance); + break; + case XE_ENGINE_CLASS_COPY: + sprintf(q->name, "bcs%d", instance); + break; + case XE_ENGINE_CLASS_COMPUTE: + sprintf(q->name, "ccs%d", instance); + break; + case XE_ENGINE_CLASS_OTHER: + sprintf(q->name, "gsccs%d", instance); + break; + default: + XE_WARN_ON(q->class); + } +} + +struct xe_exec_queue *xe_exec_queue_lookup(struct xe_file *xef, u32 id) +{ + struct xe_exec_queue *q; + + mutex_lock(&xef->exec_queue.lock); + q = xa_load(&xef->exec_queue.xa, id); + if (q) + xe_exec_queue_get(q); + mutex_unlock(&xef->exec_queue.lock); + + return q; +} + +enum xe_exec_queue_priority +xe_exec_queue_device_get_max_priority(struct xe_device *xe) +{ + return capable(CAP_SYS_NICE) ? XE_EXEC_QUEUE_PRIORITY_HIGH : + XE_EXEC_QUEUE_PRIORITY_NORMAL; +} + +static int exec_queue_set_priority(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + if (XE_IOCTL_DBG(xe, value > XE_EXEC_QUEUE_PRIORITY_HIGH)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, value > xe_exec_queue_device_get_max_priority(xe))) + return -EPERM; + + return q->ops->set_priority(q, value); +} + +static bool xe_exec_queue_enforce_schedule_limit(void) +{ +#if IS_ENABLED(CONFIG_DRM_XE_ENABLE_SCHEDTIMEOUT_LIMIT) + return true; +#else + return !capable(CAP_SYS_NICE); +#endif +} + +static void +xe_exec_queue_get_prop_minmax(struct xe_hw_engine_class_intf *eclass, + enum xe_exec_queue_sched_prop prop, + u32 *min, u32 *max) +{ + switch (prop) { + case XE_EXEC_QUEUE_JOB_TIMEOUT: + *min = eclass->sched_props.job_timeout_min; + *max = eclass->sched_props.job_timeout_max; + break; + case XE_EXEC_QUEUE_TIMESLICE: + *min = eclass->sched_props.timeslice_min; + *max = eclass->sched_props.timeslice_max; + break; + case XE_EXEC_QUEUE_PREEMPT_TIMEOUT: + *min = eclass->sched_props.preempt_timeout_min; + *max = eclass->sched_props.preempt_timeout_max; + break; + default: + break; + } +#if IS_ENABLED(CONFIG_DRM_XE_ENABLE_SCHEDTIMEOUT_LIMIT) + if (capable(CAP_SYS_NICE)) { + switch (prop) { + case XE_EXEC_QUEUE_JOB_TIMEOUT: + *min = XE_HW_ENGINE_JOB_TIMEOUT_MIN; + *max = XE_HW_ENGINE_JOB_TIMEOUT_MAX; + break; + case XE_EXEC_QUEUE_TIMESLICE: + *min = XE_HW_ENGINE_TIMESLICE_MIN; + *max = XE_HW_ENGINE_TIMESLICE_MAX; + break; + case XE_EXEC_QUEUE_PREEMPT_TIMEOUT: + *min = XE_HW_ENGINE_PREEMPT_TIMEOUT_MIN; + *max = XE_HW_ENGINE_PREEMPT_TIMEOUT_MAX; + break; + default: + break; + } + } +#endif +} + +static int exec_queue_set_timeslice(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + u32 min = 0, max = 0; + + xe_exec_queue_get_prop_minmax(q->hwe->eclass, + XE_EXEC_QUEUE_TIMESLICE, &min, &max); + + if (xe_exec_queue_enforce_schedule_limit() && + !xe_hw_engine_timeout_in_range(value, min, max)) + return -EINVAL; + + return q->ops->set_timeslice(q, value); +} + +static int exec_queue_set_preemption_timeout(struct xe_device *xe, + struct xe_exec_queue *q, u64 value, + bool create) +{ + u32 min = 0, max = 0; + + xe_exec_queue_get_prop_minmax(q->hwe->eclass, + XE_EXEC_QUEUE_PREEMPT_TIMEOUT, &min, &max); + + if (xe_exec_queue_enforce_schedule_limit() && + !xe_hw_engine_timeout_in_range(value, min, max)) + return -EINVAL; + + return q->ops->set_preempt_timeout(q, value); +} + +static int exec_queue_set_persistence(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + if (XE_IOCTL_DBG(xe, !create)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, xe_vm_in_preempt_fence_mode(q->vm))) + return -EINVAL; + + if (value) + q->flags |= EXEC_QUEUE_FLAG_PERSISTENT; + else + q->flags &= ~EXEC_QUEUE_FLAG_PERSISTENT; + + return 0; +} + +static int exec_queue_set_job_timeout(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + u32 min = 0, max = 0; + + if (XE_IOCTL_DBG(xe, !create)) + return -EINVAL; + + xe_exec_queue_get_prop_minmax(q->hwe->eclass, + XE_EXEC_QUEUE_JOB_TIMEOUT, &min, &max); + + if (xe_exec_queue_enforce_schedule_limit() && + !xe_hw_engine_timeout_in_range(value, min, max)) + return -EINVAL; + + return q->ops->set_job_timeout(q, value); +} + +static int exec_queue_set_acc_trigger(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + if (XE_IOCTL_DBG(xe, !create)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, !xe->info.has_usm)) + return -EINVAL; + + q->usm.acc_trigger = value; + + return 0; +} + +static int exec_queue_set_acc_notify(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + if (XE_IOCTL_DBG(xe, !create)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, !xe->info.has_usm)) + return -EINVAL; + + q->usm.acc_notify = value; + + return 0; +} + +static int exec_queue_set_acc_granularity(struct xe_device *xe, struct xe_exec_queue *q, + u64 value, bool create) +{ + if (XE_IOCTL_DBG(xe, !create)) + return -EINVAL; + + if (XE_IOCTL_DBG(xe, !xe->info.has_usm)) + return -EINVAL; + + if (value > DRM_XE_ACC_GRANULARITY_64M) + return -EINVAL; + + q->usm.acc_granularity = value; + + return 0; +} + +typedef int (*xe_exec_queue_set_property_fn)(struct xe_device *xe, + struct xe_exec_queue *q, + u64 value, bool create); + +static const xe_exec_queue_set_property_fn exec_queue_set_property_funcs[] = { + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_PRIORITY] = exec_queue_set_priority, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_TIMESLICE] = exec_queue_set_timeslice, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_PREEMPTION_TIMEOUT] = exec_queue_set_preemption_timeout, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_PERSISTENCE] = exec_queue_set_persistence, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_JOB_TIMEOUT] = exec_queue_set_job_timeout, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_ACC_TRIGGER] = exec_queue_set_acc_trigger, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_ACC_NOTIFY] = exec_queue_set_acc_notify, + [DRM_XE_EXEC_QUEUE_SET_PROPERTY_ACC_GRANULARITY] = exec_queue_set_acc_granularity, +}; + +static int exec_queue_user_ext_set_property(struct xe_device *xe, + struct xe_exec_queue *q, + u64 extension, + bool create) +{ + u64 __user *address = u64_to_user_ptr(extension); + struct drm_xe_ext_set_property ext; + int err; + u32 idx; + + err = __copy_from_user(&ext, address, sizeof(ext)); + if (XE_IOCTL_DBG(xe, err)) + return -EFAULT; + + if (XE_IOCTL_DBG(xe, ext.property >= + ARRAY_SIZE(exec_queue_set_property_funcs)) || + XE_IOCTL_DBG(xe, ext.pad)) + return -EINVAL; + + idx = array_index_nospec(ext.property, ARRAY_SIZE(exec_queue_set_property_funcs)); + return exec_queue_set_property_funcs[idx](xe, q, ext.value, create); +} + +typedef int (*xe_exec_queue_user_extension_fn)(struct xe_device *xe, + struct xe_exec_queue *q, + u64 extension, + bool create); + +static const xe_exec_queue_set_property_fn exec_queue_user_extension_funcs[] = { + [DRM_XE_EXEC_QUEUE_EXTENSION_SET_PROPERTY] = exec_queue_user_ext_set_property, +}; + +#define MAX_USER_EXTENSIONS 16 +static int exec_queue_user_extensions(struct xe_device *xe, struct xe_exec_queue *q, + u64 extensions, int ext_number, bool create) +{ + u64 __user *address = u64_to_user_ptr(extensions); + struct drm_xe_user_extension ext; + int err; + u32 idx; + + if (XE_IOCTL_DBG(xe, ext_number >= MAX_USER_EXTENSIONS)) + return -E2BIG; + + err = __copy_from_user(&ext, address, sizeof(ext)); + if (XE_IOCTL_DBG(xe, err)) + return -EFAULT; + + if (XE_IOCTL_DBG(xe, ext.pad) || + XE_IOCTL_DBG(xe, ext.name >= + ARRAY_SIZE(exec_queue_user_extension_funcs))) + return -EINVAL; + + idx = array_index_nospec(ext.name, + ARRAY_SIZE(exec_queue_user_extension_funcs)); + err = exec_queue_user_extension_funcs[idx](xe, q, extensions, create); + if (XE_IOCTL_DBG(xe, err)) + return err; + + if (ext.next_extension) + return exec_queue_user_extensions(xe, q, ext.next_extension, + ++ext_number, create); + + return 0; +} + +static const enum xe_engine_class user_to_xe_engine_class[] = { + [DRM_XE_ENGINE_CLASS_RENDER] = XE_ENGINE_CLASS_RENDER, + [DRM_XE_ENGINE_CLASS_COPY] = XE_ENGINE_CLASS_COPY, + [DRM_XE_ENGINE_CLASS_VIDEO_DECODE] = XE_ENGINE_CLASS_VIDEO_DECODE, + [DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE] = XE_ENGINE_CLASS_VIDEO_ENHANCE, + [DRM_XE_ENGINE_CLASS_COMPUTE] = XE_ENGINE_CLASS_COMPUTE, +}; + +static struct xe_hw_engine * +find_hw_engine(struct xe_device *xe, + struct drm_xe_engine_class_instance eci) +{ + u32 idx; + + if (eci.engine_class > ARRAY_SIZE(user_to_xe_engine_class)) + return NULL; + + if (eci.gt_id >= xe->info.gt_count) + return NULL; + + idx = array_index_nospec(eci.engine_class, + ARRAY_SIZE(user_to_xe_engine_class)); + + return xe_gt_hw_engine(xe_device_get_gt(xe, eci.gt_id), + user_to_xe_engine_class[idx], + eci.engine_instance, true); +} + +static u32 bind_exec_queue_logical_mask(struct xe_device *xe, struct xe_gt *gt, + struct drm_xe_engine_class_instance *eci, + u16 width, u16 num_placements) +{ + struct xe_hw_engine *hwe; + enum xe_hw_engine_id id; + u32 logical_mask = 0; + + if (XE_IOCTL_DBG(xe, width != 1)) + return 0; + if (XE_IOCTL_DBG(xe, num_placements != 1)) + return 0; + if (XE_IOCTL_DBG(xe, eci[0].engine_instance != 0)) + return 0; + + eci[0].engine_class = DRM_XE_ENGINE_CLASS_COPY; + + for_each_hw_engine(hwe, gt, id) { + if (xe_hw_engine_is_reserved(hwe)) + continue; + + if (hwe->class == + user_to_xe_engine_class[DRM_XE_ENGINE_CLASS_COPY]) + logical_mask |= BIT(hwe->logical_instance); + } + + return logical_mask; +} + +static u32 calc_validate_logical_mask(struct xe_device *xe, struct xe_gt *gt, + struct drm_xe_engine_class_instance *eci, + u16 width, u16 num_placements) +{ + int len = width * num_placements; + int i, j, n; + u16 class; + u16 gt_id; + u32 return_mask = 0, prev_mask; + + if (XE_IOCTL_DBG(xe, !xe_device_uc_enabled(xe) && + len > 1)) + return 0; + + for (i = 0; i < width; ++i) { + u32 current_mask = 0; + + for (j = 0; j < num_placements; ++j) { + struct xe_hw_engine *hwe; + + n = j * width + i; + + hwe = find_hw_engine(xe, eci[n]); + if (XE_IOCTL_DBG(xe, !hwe)) + return 0; + + if (XE_IOCTL_DBG(xe, xe_hw_engine_is_reserved(hwe))) + return 0; + + if (XE_IOCTL_DBG(xe, n && eci[n].gt_id != gt_id) || + XE_IOCTL_DBG(xe, n && eci[n].engine_class != class)) + return 0; + + class = eci[n].engine_class; + gt_id = eci[n].gt_id; + + if (width == 1 || !i) + return_mask |= BIT(eci[n].engine_instance); + current_mask |= BIT(eci[n].engine_instance); + } + + /* Parallel submissions must be logically contiguous */ + if (i && XE_IOCTL_DBG(xe, current_mask != prev_mask << 1)) + return 0; + + prev_mask = current_mask; + } + + return return_mask; +} + +int xe_exec_queue_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct xe_device *xe = to_xe_device(dev); + struct xe_file *xef = to_xe_file(file); + struct drm_xe_exec_queue_create *args = data; + struct drm_xe_engine_class_instance eci[XE_HW_ENGINE_MAX_INSTANCE]; + struct drm_xe_engine_class_instance __user *user_eci = + u64_to_user_ptr(args->instances); + struct xe_hw_engine *hwe; + struct xe_vm *vm, *migrate_vm; + struct xe_gt *gt; + struct xe_exec_queue *q = NULL; + u32 logical_mask; + u32 id; + u32 len; + int err; + + if (XE_IOCTL_DBG(xe, args->flags) || + XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1])) + return -EINVAL; + + len = args->width * args->num_placements; + if (XE_IOCTL_DBG(xe, !len || len > XE_HW_ENGINE_MAX_INSTANCE)) + return -EINVAL; + + err = __copy_from_user(eci, user_eci, + sizeof(struct drm_xe_engine_class_instance) * + len); + if (XE_IOCTL_DBG(xe, err)) + return -EFAULT; + + if (XE_IOCTL_DBG(xe, eci[0].gt_id >= xe->info.gt_count)) + return -EINVAL; + + if (eci[0].engine_class == DRM_XE_ENGINE_CLASS_VM_BIND) { + for_each_gt(gt, xe, id) { + struct xe_exec_queue *new; + + if (xe_gt_is_media_type(gt)) + continue; + + eci[0].gt_id = gt->info.id; + logical_mask = bind_exec_queue_logical_mask(xe, gt, eci, + args->width, + args->num_placements); + if (XE_IOCTL_DBG(xe, !logical_mask)) + return -EINVAL; + + hwe = find_hw_engine(xe, eci[0]); + if (XE_IOCTL_DBG(xe, !hwe)) + return -EINVAL; + + /* The migration vm doesn't hold rpm ref */ + xe_device_mem_access_get(xe); + + migrate_vm = xe_migrate_get_vm(gt_to_tile(gt)->migrate); + new = xe_exec_queue_create(xe, migrate_vm, logical_mask, + args->width, hwe, + EXEC_QUEUE_FLAG_PERSISTENT | + EXEC_QUEUE_FLAG_VM | + (id ? + EXEC_QUEUE_FLAG_BIND_ENGINE_CHILD : + 0)); + + xe_device_mem_access_put(xe); /* now held by engine */ + + xe_vm_put(migrate_vm); + if (IS_ERR(new)) { + err = PTR_ERR(new); + if (q) + goto put_exec_queue; + return err; + } + if (id == 0) + q = new; + else + list_add_tail(&new->multi_gt_list, + &q->multi_gt_link); + } + } else { + gt = xe_device_get_gt(xe, eci[0].gt_id); + logical_mask = calc_validate_logical_mask(xe, gt, eci, + args->width, + args->num_placements); + if (XE_IOCTL_DBG(xe, !logical_mask)) + return -EINVAL; + + hwe = find_hw_engine(xe, eci[0]); + if (XE_IOCTL_DBG(xe, !hwe)) + return -EINVAL; + + vm = xe_vm_lookup(xef, args->vm_id); + if (XE_IOCTL_DBG(xe, !vm)) + return -ENOENT; + + err = down_read_interruptible(&vm->lock); + if (err) { + xe_vm_put(vm); + return err; + } + + if (XE_IOCTL_DBG(xe, xe_vm_is_closed_or_banned(vm))) { + up_read(&vm->lock); + xe_vm_put(vm); + return -ENOENT; + } + + q = xe_exec_queue_create(xe, vm, logical_mask, + args->width, hwe, + xe_vm_in_lr_mode(vm) ? 0 : + EXEC_QUEUE_FLAG_PERSISTENT); + up_read(&vm->lock); + xe_vm_put(vm); + if (IS_ERR(q)) + return PTR_ERR(q); + + if (xe_vm_in_preempt_fence_mode(vm)) { + q->compute.context = dma_fence_context_alloc(1); + spin_lock_init(&q->compute.lock); + + err = xe_vm_add_compute_exec_queue(vm, q); + if (XE_IOCTL_DBG(xe, err)) + goto put_exec_queue; + } + } + + if (args->extensions) { + err = exec_queue_user_extensions(xe, q, args->extensions, 0, true); + if (XE_IOCTL_DBG(xe, err)) + goto kill_exec_queue; + } + + q->persistent.xef = xef; + + mutex_lock(&xef->exec_queue.lock); + err = xa_alloc(&xef->exec_queue.xa, &id, q, xa_limit_32b, GFP_KERNEL); + mutex_unlock(&xef->exec_queue.lock); + if (err) + goto kill_exec_queue; + + args->exec_queue_id = id; + + return 0; + +kill_exec_queue: + xe_exec_queue_kill(q); +put_exec_queue: + xe_exec_queue_put(q); + return err; +} + +int xe_exec_queue_get_property_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct xe_device *xe = to_xe_device(dev); + struct xe_file *xef = to_xe_file(file); + struct drm_xe_exec_queue_get_property *args = data; + struct xe_exec_queue *q; + int ret; + + if (XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1])) + return -EINVAL; + + q = xe_exec_queue_lookup(xef, args->exec_queue_id); + if (XE_IOCTL_DBG(xe, !q)) + return -ENOENT; + + switch (args->property) { + case DRM_XE_EXEC_QUEUE_GET_PROPERTY_BAN: + args->value = !!(q->flags & EXEC_QUEUE_FLAG_BANNED); + ret = 0; + break; + default: + ret = -EINVAL; + } + + xe_exec_queue_put(q); + + return ret; +} + +/** + * xe_exec_queue_is_lr() - Whether an exec_queue is long-running + * @q: The exec_queue + * + * Return: True if the exec_queue is long-running, false otherwise. + */ +bool xe_exec_queue_is_lr(struct xe_exec_queue *q) +{ + return q->vm && xe_vm_in_lr_mode(q->vm) && + !(q->flags & EXEC_QUEUE_FLAG_VM); +} + +static s32 xe_exec_queue_num_job_inflight(struct xe_exec_queue *q) +{ + return q->lrc->fence_ctx.next_seqno - xe_lrc_seqno(q->lrc) - 1; +} + +/** + * xe_exec_queue_ring_full() - Whether an exec_queue's ring is full + * @q: The exec_queue + * + * Return: True if the exec_queue's ring is full, false otherwise. + */ +bool xe_exec_queue_ring_full(struct xe_exec_queue *q) +{ + struct xe_lrc *lrc = q->lrc; + s32 max_job = lrc->ring.size / MAX_JOB_SIZE_BYTES; + + return xe_exec_queue_num_job_inflight(q) >= max_job; +} + +/** + * xe_exec_queue_is_idle() - Whether an exec_queue is idle. + * @q: The exec_queue + * + * FIXME: Need to determine what to use as the short-lived + * timeline lock for the exec_queues, so that the return value + * of this function becomes more than just an advisory + * snapshot in time. The timeline lock must protect the + * seqno from racing submissions on the same exec_queue. + * Typically vm->resv, but user-created timeline locks use the migrate vm + * and never grabs the migrate vm->resv so we have a race there. + * + * Return: True if the exec_queue is idle, false otherwise. + */ +bool xe_exec_queue_is_idle(struct xe_exec_queue *q) +{ + if (xe_exec_queue_is_parallel(q)) { + int i; + + for (i = 0; i < q->width; ++i) { + if (xe_lrc_seqno(&q->lrc[i]) != + q->lrc[i].fence_ctx.next_seqno - 1) + return false; + } + + return true; + } + + return xe_lrc_seqno(&q->lrc[0]) == + q->lrc[0].fence_ctx.next_seqno - 1; +} + +void xe_exec_queue_kill(struct xe_exec_queue *q) +{ + struct xe_exec_queue *eq = q, *next; + + list_for_each_entry_safe(eq, next, &eq->multi_gt_list, + multi_gt_link) { + q->ops->kill(eq); + xe_vm_remove_compute_exec_queue(q->vm, eq); + } + + q->ops->kill(q); + xe_vm_remove_compute_exec_queue(q->vm, q); +} + +int xe_exec_queue_destroy_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct xe_device *xe = to_xe_device(dev); + struct xe_file *xef = to_xe_file(file); + struct drm_xe_exec_queue_destroy *args = data; + struct xe_exec_queue *q; + + if (XE_IOCTL_DBG(xe, args->pad) || + XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1])) + return -EINVAL; + + mutex_lock(&xef->exec_queue.lock); + q = xa_erase(&xef->exec_queue.xa, args->exec_queue_id); + mutex_unlock(&xef->exec_queue.lock); + if (XE_IOCTL_DBG(xe, !q)) + return -ENOENT; + + if (!(q->flags & EXEC_QUEUE_FLAG_PERSISTENT)) + xe_exec_queue_kill(q); + else + xe_device_add_persistent_exec_queues(xe, q); + + trace_xe_exec_queue_close(q); + xe_exec_queue_put(q); + + return 0; +} + +static void xe_exec_queue_last_fence_lockdep_assert(struct xe_exec_queue *q, + struct xe_vm *vm) +{ + if (q->flags & EXEC_QUEUE_FLAG_VM) + lockdep_assert_held(&vm->lock); + else + xe_vm_assert_held(vm); +} + +/** + * xe_exec_queue_last_fence_put() - Drop ref to last fence + * @q: The exec queue + * @vm: The VM the engine does a bind or exec for + */ +void xe_exec_queue_last_fence_put(struct xe_exec_queue *q, struct xe_vm *vm) +{ + xe_exec_queue_last_fence_lockdep_assert(q, vm); + + if (q->last_fence) { + dma_fence_put(q->last_fence); + q->last_fence = NULL; + } +} + +/** + * xe_exec_queue_last_fence_put_unlocked() - Drop ref to last fence unlocked + * @q: The exec queue + * + * Only safe to be called from xe_exec_queue_destroy(). + */ +void xe_exec_queue_last_fence_put_unlocked(struct xe_exec_queue *q) +{ + if (q->last_fence) { + dma_fence_put(q->last_fence); + q->last_fence = NULL; + } +} + +/** + * xe_exec_queue_last_fence_get() - Get last fence + * @q: The exec queue + * @vm: The VM the engine does a bind or exec for + * + * Get last fence, does not take a ref + * + * Returns: last fence if not signaled, dma fence stub if signaled + */ +struct dma_fence *xe_exec_queue_last_fence_get(struct xe_exec_queue *q, + struct xe_vm *vm) +{ + xe_exec_queue_last_fence_lockdep_assert(q, vm); + + if (q->last_fence && + test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &q->last_fence->flags)) + xe_exec_queue_last_fence_put(q, vm); + + return q->last_fence ? q->last_fence : dma_fence_get_stub(); +} + +/** + * xe_exec_queue_last_fence_set() - Set last fence + * @q: The exec queue + * @vm: The VM the engine does a bind or exec for + * @fence: The fence + * + * Set the last fence for the engine. Increases reference count for fence, when + * closing engine xe_exec_queue_last_fence_put should be called. + */ +void xe_exec_queue_last_fence_set(struct xe_exec_queue *q, struct xe_vm *vm, + struct dma_fence *fence) +{ + xe_exec_queue_last_fence_lockdep_assert(q, vm); + + xe_exec_queue_last_fence_put(q, vm); + q->last_fence = dma_fence_get(fence); +} |