diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drm_client.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drm_client.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c new file mode 100644 index 000000000000..18d38cb59923 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_drm_client.c @@ -0,0 +1,159 @@ +// 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(); + + 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 |