| // SPDX-License-Identifier: MIT |
| /* |
| * Copyright © 2020 Intel Corporation |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| |
| #include <uapi/drm/i915_drm.h> |
| |
| #include <drm/drm_print.h> |
| |
| #include "gem/i915_gem_context.h" |
| #include "i915_drm_client.h" |
| #include "i915_file_private.h" |
| #include "i915_gem.h" |
| #include "i915_utils.h" |
| |
| void i915_drm_clients_init(struct i915_drm_clients *clients, |
| struct drm_i915_private *i915) |
| { |
| clients->i915 = i915; |
| clients->next_id = 0; |
| |
| xa_init_flags(&clients->xarray, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); |
| } |
| |
| struct i915_drm_client *i915_drm_client_add(struct i915_drm_clients *clients) |
| { |
| struct i915_drm_client *client; |
| struct xarray *xa = &clients->xarray; |
| int ret; |
| |
| client = kzalloc(sizeof(*client), GFP_KERNEL); |
| if (!client) |
| return ERR_PTR(-ENOMEM); |
| |
| xa_lock_irq(xa); |
| ret = __xa_alloc_cyclic(xa, &client->id, client, xa_limit_32b, |
| &clients->next_id, GFP_KERNEL); |
| xa_unlock_irq(xa); |
| if (ret < 0) |
| goto err; |
| |
| kref_init(&client->kref); |
| spin_lock_init(&client->ctx_lock); |
| INIT_LIST_HEAD(&client->ctx_list); |
| client->clients = clients; |
| |
| return client; |
| |
| err: |
| kfree(client); |
| |
| return ERR_PTR(ret); |
| } |
| |
| void __i915_drm_client_free(struct kref *kref) |
| { |
| struct i915_drm_client *client = |
| container_of(kref, typeof(*client), kref); |
| struct xarray *xa = &client->clients->xarray; |
| unsigned long flags; |
| |
| xa_lock_irqsave(xa, flags); |
| __xa_erase(xa, client->id); |
| xa_unlock_irqrestore(xa, flags); |
| kfree(client); |
| } |
| |
| void i915_drm_clients_fini(struct i915_drm_clients *clients) |
| { |
| GEM_BUG_ON(!xa_empty(&clients->xarray)); |
| xa_destroy(&clients->xarray); |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| static const char * const uabi_class_names[] = { |
| [I915_ENGINE_CLASS_RENDER] = "render", |
| [I915_ENGINE_CLASS_COPY] = "copy", |
| [I915_ENGINE_CLASS_VIDEO] = "video", |
| [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance", |
| [I915_ENGINE_CLASS_COMPUTE] = "compute", |
| }; |
| |
| static u64 busy_add(struct i915_gem_context *ctx, unsigned int class) |
| { |
| struct i915_gem_engines_iter it; |
| struct intel_context *ce; |
| u64 total = 0; |
| |
| for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) { |
| if (ce->engine->uabi_class != class) |
| continue; |
| |
| total += intel_context_get_total_runtime_ns(ce); |
| } |
| |
| return total; |
| } |
| |
| static void |
| show_client_class(struct seq_file *m, |
| struct i915_drm_client *client, |
| unsigned int class) |
| { |
| const struct list_head *list = &client->ctx_list; |
| u64 total = atomic64_read(&client->past_runtime[class]); |
| const unsigned int capacity = |
| client->clients->i915->engine_uabi_class_count[class]; |
| struct i915_gem_context *ctx; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(ctx, list, client_link) |
| total += busy_add(ctx, class); |
| rcu_read_unlock(); |
| |
| if (capacity) |
| seq_printf(m, "drm-engine-%s:\t%llu ns\n", |
| uabi_class_names[class], total); |
| |
| if (capacity > 1) |
| seq_printf(m, "drm-engine-capacity-%s:\t%u\n", |
| uabi_class_names[class], |
| capacity); |
| } |
| |
| void i915_drm_client_fdinfo(struct seq_file *m, struct file *f) |
| { |
| struct drm_file *file = f->private_data; |
| struct drm_i915_file_private *file_priv = file->driver_priv; |
| struct drm_i915_private *i915 = file_priv->dev_priv; |
| struct i915_drm_client *client = file_priv->client; |
| struct pci_dev *pdev = to_pci_dev(i915->drm.dev); |
| unsigned int i; |
| |
| /* |
| * ****************************************************************** |
| * For text output format description please see drm-usage-stats.rst! |
| * ****************************************************************** |
| */ |
| |
| seq_printf(m, "drm-driver:\t%s\n", i915->drm.driver->name); |
| seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n", |
| pci_domain_nr(pdev->bus), pdev->bus->number, |
| PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); |
| seq_printf(m, "drm-client-id:\t%u\n", client->id); |
| |
| /* |
| * Temporarily skip showing client engine information with GuC submission till |
| * fetching engine busyness is implemented in the GuC submission backend |
| */ |
| if (GRAPHICS_VER(i915) < 8 || intel_uc_uses_guc_submission(&i915->gt0.uc)) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) |
| show_client_class(m, client, i); |
| } |
| #endif |