1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2020 Intel Corporation
  4 */
  5
  6#include <linux/kernel.h>
  7#include <linux/slab.h>
  8#include <linux/types.h>
  9
 10#include <uapi/drm/i915_drm.h>
 11
 12#include <drm/drm_print.h>
 13
 14#include "gem/i915_gem_context.h"
 15#include "i915_drm_client.h"
 16#include "i915_file_private.h"
 17#include "i915_gem.h"
 18#include "i915_utils.h"
 19
 20void i915_drm_clients_init(struct i915_drm_clients *clients,
 21			   struct drm_i915_private *i915)
 22{
 23	clients->i915 = i915;
 24	clients->next_id = 0;
 25
 26	xa_init_flags(&clients->xarray, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
 27}
 28
 29struct i915_drm_client *i915_drm_client_add(struct i915_drm_clients *clients)
 30{
 31	struct i915_drm_client *client;
 32	struct xarray *xa = &clients->xarray;
 33	int ret;
 34
 35	client = kzalloc(sizeof(*client), GFP_KERNEL);
 36	if (!client)
 37		return ERR_PTR(-ENOMEM);
 38
 39	xa_lock_irq(xa);
 40	ret = __xa_alloc_cyclic(xa, &client->id, client, xa_limit_32b,
 41				&clients->next_id, GFP_KERNEL);
 42	xa_unlock_irq(xa);
 43	if (ret < 0)
 44		goto err;
 45
 46	kref_init(&client->kref);
 47	spin_lock_init(&client->ctx_lock);
 48	INIT_LIST_HEAD(&client->ctx_list);
 49	client->clients = clients;
 50
 51	return client;
 52
 53err:
 54	kfree(client);
 55
 56	return ERR_PTR(ret);
 57}
 58
 59void __i915_drm_client_free(struct kref *kref)
 60{
 61	struct i915_drm_client *client =
 62		container_of(kref, typeof(*client), kref);
 63	struct xarray *xa = &client->clients->xarray;
 64	unsigned long flags;
 65
 66	xa_lock_irqsave(xa, flags);
 67	__xa_erase(xa, client->id);
 68	xa_unlock_irqrestore(xa, flags);
 69	kfree(client);
 70}
 71
 72void i915_drm_clients_fini(struct i915_drm_clients *clients)
 73{
 74	GEM_BUG_ON(!xa_empty(&clients->xarray));
 75	xa_destroy(&clients->xarray);
 76}
 77
 78#ifdef CONFIG_PROC_FS
 79static const char * const uabi_class_names[] = {
 80	[I915_ENGINE_CLASS_RENDER] = "render",
 81	[I915_ENGINE_CLASS_COPY] = "copy",
 82	[I915_ENGINE_CLASS_VIDEO] = "video",
 83	[I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
 84	[I915_ENGINE_CLASS_COMPUTE] = "compute",
 85};
 86
 87static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
 88{
 89	struct i915_gem_engines_iter it;
 90	struct intel_context *ce;
 91	u64 total = 0;
 92
 93	for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
 94		if (ce->engine->uabi_class != class)
 95			continue;
 96
 97		total += intel_context_get_total_runtime_ns(ce);
 98	}
 99
100	return total;
101}
102
103static void
104show_client_class(struct seq_file *m,
105		  struct i915_drm_client *client,
106		  unsigned int class)
107{
108	const struct list_head *list = &client->ctx_list;
109	u64 total = atomic64_read(&client->past_runtime[class]);
110	const unsigned int capacity =
111		client->clients->i915->engine_uabi_class_count[class];
112	struct i915_gem_context *ctx;
113
114	rcu_read_lock();
115	list_for_each_entry_rcu(ctx, list, client_link)
116		total += busy_add(ctx, class);
117	rcu_read_unlock();
118
119	if (capacity)
120		seq_printf(m, "drm-engine-%s:\t%llu ns\n",
121			   uabi_class_names[class], total);
122
123	if (capacity > 1)
124		seq_printf(m, "drm-engine-capacity-%s:\t%u\n",
125			   uabi_class_names[class],
126			   capacity);
127}
128
129void i915_drm_client_fdinfo(struct seq_file *m, struct file *f)
130{
131	struct drm_file *file = f->private_data;
132	struct drm_i915_file_private *file_priv = file->driver_priv;
133	struct drm_i915_private *i915 = file_priv->dev_priv;
134	struct i915_drm_client *client = file_priv->client;
135	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
136	unsigned int i;
137
138	/*
139	 * ******************************************************************
140	 * For text output format description please see drm-usage-stats.rst!
141	 * ******************************************************************
142	 */
143
144	seq_printf(m, "drm-driver:\t%s\n", i915->drm.driver->name);
145	seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n",
146		   pci_domain_nr(pdev->bus), pdev->bus->number,
147		   PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
148	seq_printf(m, "drm-client-id:\t%u\n", client->id);
149
150	/*
151	 * Temporarily skip showing client engine information with GuC submission till
152	 * fetching engine busyness is implemented in the GuC submission backend
153	 */
154	if (GRAPHICS_VER(i915) < 8 || intel_uc_uses_guc_submission(&i915->gt0.uc))
155		return;
156
157	for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
158		show_client_class(m, client, i);
159}
160#endif