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
i915_drm_clients_init(struct i915_drm_clients * clients,struct drm_i915_private * i915)20 void 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
i915_drm_client_add(struct i915_drm_clients * clients)29 struct 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
53 err:
54 kfree(client);
55
56 return ERR_PTR(ret);
57 }
58
__i915_drm_client_free(struct kref * kref)59 void __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
i915_drm_clients_fini(struct i915_drm_clients * clients)72 void 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
79 static 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
busy_add(struct i915_gem_context * ctx,unsigned int class)87 static 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
103 static void
show_client_class(struct seq_file * m,struct i915_drm_client * client,unsigned int class)104 show_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
i915_drm_client_fdinfo(struct seq_file * m,struct file * f)129 void 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
161