blob: 33f8a4b3c98170f2857e15255e4fc23ae8bbb49e [file] [log] [blame]
Ben Widawsky254f9652012-06-04 14:42:42 -07001/*
2 * Copyright © 2011-2012 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Ben Widawsky <ben@bwidawsk.net>
25 *
26 */
27
28/*
29 * This file implements HW context support. On gen5+ a HW context consists of an
30 * opaque GPU object which is referenced at times of context saves and restores.
31 * With RC6 enabled, the context is also referenced as the GPU enters and exists
32 * from RC6 (GPU has it's own internal power context, except on gen5). Though
33 * something like a context does exist for the media ring, the code only
34 * supports contexts for the render ring.
35 *
36 * In software, there is a distinction between contexts created by the user,
37 * and the default HW context. The default HW context is used by GPU clients
38 * that do not request setup of their own hardware context. The default
39 * context's state is never restored to help prevent programming errors. This
40 * would happen if a client ran and piggy-backed off another clients GPU state.
41 * The default context only exists to give the GPU some offset to load as the
42 * current to invoke a save of the context we actually care about. In fact, the
43 * code could likely be constructed, albeit in a more complicated fashion, to
44 * never use the default context, though that limits the driver's ability to
45 * swap out, and/or destroy other contexts.
46 *
47 * All other contexts are created as a request by the GPU client. These contexts
48 * store GPU state, and thus allow GPU clients to not re-emit state (and
49 * potentially query certain state) at any time. The kernel driver makes
50 * certain that the appropriate commands are inserted.
51 *
52 * The context life cycle is semi-complicated in that context BOs may live
53 * longer than the context itself because of the way the hardware, and object
54 * tracking works. Below is a very crude representation of the state machine
55 * describing the context life.
56 * refcount pincount active
57 * S0: initial state 0 0 0
58 * S1: context created 1 0 0
59 * S2: context is currently running 2 1 X
60 * S3: GPU referenced, but not current 2 0 1
61 * S4: context is current, but destroyed 1 1 0
62 * S5: like S3, but destroyed 1 0 1
63 *
64 * The most common (but not all) transitions:
65 * S0->S1: client creates a context
66 * S1->S2: client submits execbuf with context
67 * S2->S3: other clients submits execbuf with context
68 * S3->S1: context object was retired
69 * S3->S2: clients submits another execbuf
70 * S2->S4: context destroy called with current context
71 * S3->S5->S0: destroy path
72 * S4->S5->S0: destroy path on current context
73 *
74 * There are two confusing terms used above:
75 * The "current context" means the context which is currently running on the
Damien Lespiau508842a2013-08-30 14:40:26 +010076 * GPU. The GPU has loaded its state already and has stored away the gtt
Ben Widawsky254f9652012-06-04 14:42:42 -070077 * offset of the BO. The GPU is not actively referencing the data at this
78 * offset, but it will on the next context switch. The only way to avoid this
79 * is to do a GPU reset.
80 *
81 * An "active context' is one which was previously the "current context" and is
82 * on the active list waiting for the next context switch to occur. Until this
83 * happens, the object must remain at the same gtt offset. It is therefore
84 * possible to destroy a context, but it is still active.
85 *
86 */
87
Chris Wilson4ff4b442017-06-16 15:05:16 +010088#include <linux/log2.h>
David Howells760285e2012-10-02 18:01:07 +010089#include <drm/drmP.h>
90#include <drm/i915_drm.h>
Ben Widawsky254f9652012-06-04 14:42:42 -070091#include "i915_drv.h"
Daniele Ceraolo Spurio198c9742014-11-10 13:44:31 +000092#include "i915_trace.h"
Oscar Mateo59b449d2018-04-10 09:12:47 -070093#include "intel_workarounds.h"
Ben Widawsky254f9652012-06-04 14:42:42 -070094
Chris Wilsonb2e862d2016-04-28 09:56:41 +010095#define ALL_L3_SLICES(dev) (1 << NUM_L3_SLICES(dev)) - 1
96
Chris Wilsond1b48c12017-08-16 09:52:08 +010097static void lut_close(struct i915_gem_context *ctx)
Chris Wilson4ff4b442017-06-16 15:05:16 +010098{
Chris Wilsond1b48c12017-08-16 09:52:08 +010099 struct i915_lut_handle *lut, *ln;
100 struct radix_tree_iter iter;
101 void __rcu **slot;
Chris Wilson4ff4b442017-06-16 15:05:16 +0100102
Chris Wilsond1b48c12017-08-16 09:52:08 +0100103 list_for_each_entry_safe(lut, ln, &ctx->handles_list, ctx_link) {
104 list_del(&lut->obj_link);
105 kmem_cache_free(ctx->i915->luts, lut);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100106 }
Chris Wilson4ff4b442017-06-16 15:05:16 +0100107
Chris Wilson547da762017-10-26 14:00:32 +0100108 rcu_read_lock();
Chris Wilsond1b48c12017-08-16 09:52:08 +0100109 radix_tree_for_each_slot(slot, &ctx->handles_vma, &iter, 0) {
110 struct i915_vma *vma = rcu_dereference_raw(*slot);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100111
Chris Wilsond1b48c12017-08-16 09:52:08 +0100112 radix_tree_iter_delete(&ctx->handles_vma, &iter, slot);
Chris Wilson94dec872017-11-09 08:55:40 +0000113 __i915_gem_object_release_unless_active(vma->obj);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100114 }
Chris Wilson547da762017-10-26 14:00:32 +0100115 rcu_read_unlock();
Chris Wilson4ff4b442017-06-16 15:05:16 +0100116}
117
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100118static void i915_gem_context_free(struct i915_gem_context *ctx)
Ben Widawsky40521052012-06-04 14:42:43 -0700119{
Chris Wilsonab82a062018-04-30 14:15:01 +0100120 unsigned int n;
Ben Widawsky40521052012-06-04 14:42:43 -0700121
Chris Wilson91c8a322016-07-05 10:40:23 +0100122 lockdep_assert_held(&ctx->i915->drm.struct_mutex);
Chris Wilson60958682016-12-31 11:20:11 +0000123 GEM_BUG_ON(!i915_gem_context_is_closed(ctx));
Daniele Ceraolo Spurio198c9742014-11-10 13:44:31 +0000124
Daniel Vetterae6c4802014-08-06 15:04:53 +0200125 i915_ppgtt_put(ctx->ppgtt);
126
Chris Wilsonab82a062018-04-30 14:15:01 +0100127 for (n = 0; n < ARRAY_SIZE(ctx->__engine); n++) {
128 struct intel_context *ce = &ctx->__engine[n];
Chris Wilsonbca44d82016-05-24 14:53:41 +0100129
130 if (!ce->state)
131 continue;
132
133 WARN_ON(ce->pin_count);
Chris Wilsondca33ec2016-08-02 22:50:20 +0100134 if (ce->ring)
Chris Wilson7e37f882016-08-02 22:50:21 +0100135 intel_ring_free(ce->ring);
Chris Wilsonbca44d82016-05-24 14:53:41 +0100136
Chris Wilsonf8a7fde2016-10-28 13:58:29 +0100137 __i915_gem_object_release_unless_active(ce->state->obj);
Chris Wilsonbca44d82016-05-24 14:53:41 +0100138 }
139
Chris Wilson562f5d42016-10-28 13:58:54 +0100140 kfree(ctx->name);
Chris Wilsonc84455b2016-08-15 10:49:08 +0100141 put_pid(ctx->pid);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100142
Ben Widawskyc7c48df2013-12-06 14:11:15 -0800143 list_del(&ctx->link);
Chris Wilson5d1808e2016-04-28 09:56:51 +0100144
Chris Wilson829a0af2017-06-20 12:05:45 +0100145 ida_simple_remove(&ctx->i915->contexts.hw_ida, ctx->hw_id);
Chris Wilson1acfc102017-06-20 12:05:47 +0100146 kfree_rcu(ctx, rcu);
Ben Widawsky40521052012-06-04 14:42:43 -0700147}
148
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100149static void contexts_free(struct drm_i915_private *i915)
150{
151 struct llist_node *freed = llist_del_all(&i915->contexts.free_list);
Chris Wilsonfad20832017-07-01 00:05:17 +0100152 struct i915_gem_context *ctx, *cn;
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100153
154 lockdep_assert_held(&i915->drm.struct_mutex);
155
Chris Wilsonfad20832017-07-01 00:05:17 +0100156 llist_for_each_entry_safe(ctx, cn, freed, free_link)
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100157 i915_gem_context_free(ctx);
158}
159
Chris Wilsoncb0aeaa2017-07-05 15:26:34 +0100160static void contexts_free_first(struct drm_i915_private *i915)
161{
162 struct i915_gem_context *ctx;
163 struct llist_node *freed;
164
165 lockdep_assert_held(&i915->drm.struct_mutex);
166
167 freed = llist_del_first(&i915->contexts.free_list);
168 if (!freed)
169 return;
170
171 ctx = container_of(freed, typeof(*ctx), free_link);
172 i915_gem_context_free(ctx);
173}
174
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100175static void contexts_free_worker(struct work_struct *work)
176{
177 struct drm_i915_private *i915 =
178 container_of(work, typeof(*i915), contexts.free_work);
179
180 mutex_lock(&i915->drm.struct_mutex);
181 contexts_free(i915);
182 mutex_unlock(&i915->drm.struct_mutex);
183}
184
185void i915_gem_context_release(struct kref *ref)
186{
187 struct i915_gem_context *ctx = container_of(ref, typeof(*ctx), ref);
188 struct drm_i915_private *i915 = ctx->i915;
189
190 trace_i915_context_free(ctx);
191 if (llist_add(&ctx->free_link, &i915->contexts.free_list))
192 queue_work(i915->wq, &i915->contexts.free_work);
193}
194
Chris Wilson50e046b2016-08-04 07:52:46 +0100195static void context_close(struct i915_gem_context *ctx)
196{
Chris Wilson60958682016-12-31 11:20:11 +0000197 i915_gem_context_set_closed(ctx);
Chris Wilsond1b48c12017-08-16 09:52:08 +0100198
Chris Wilson94dec872017-11-09 08:55:40 +0000199 /*
200 * The LUT uses the VMA as a backpointer to unref the object,
201 * so we need to clear the LUT before we close all the VMA (inside
202 * the ppgtt).
203 */
Chris Wilsond1b48c12017-08-16 09:52:08 +0100204 lut_close(ctx);
Chris Wilson50e046b2016-08-04 07:52:46 +0100205 if (ctx->ppgtt)
206 i915_ppgtt_close(&ctx->ppgtt->base);
Chris Wilsond1b48c12017-08-16 09:52:08 +0100207
Chris Wilson50e046b2016-08-04 07:52:46 +0100208 ctx->file_priv = ERR_PTR(-EBADF);
209 i915_gem_context_put(ctx);
210}
211
Chris Wilson5d1808e2016-04-28 09:56:51 +0100212static int assign_hw_id(struct drm_i915_private *dev_priv, unsigned *out)
213{
214 int ret;
Daniele Ceraolo Spurioac52da62018-03-02 18:14:58 +0200215 unsigned int max;
216
217 if (INTEL_GEN(dev_priv) >= 11)
218 max = GEN11_MAX_CONTEXT_HW_ID;
219 else
220 max = MAX_CONTEXT_HW_ID;
Chris Wilson5d1808e2016-04-28 09:56:51 +0100221
Chris Wilson829a0af2017-06-20 12:05:45 +0100222 ret = ida_simple_get(&dev_priv->contexts.hw_ida,
Daniele Ceraolo Spurioac52da62018-03-02 18:14:58 +0200223 0, max, GFP_KERNEL);
Chris Wilson5d1808e2016-04-28 09:56:51 +0100224 if (ret < 0) {
225 /* Contexts are only released when no longer active.
226 * Flush any pending retires to hopefully release some
227 * stale contexts and try again.
228 */
Chris Wilsone61e0f52018-02-21 09:56:36 +0000229 i915_retire_requests(dev_priv);
Chris Wilson829a0af2017-06-20 12:05:45 +0100230 ret = ida_simple_get(&dev_priv->contexts.hw_ida,
Daniele Ceraolo Spurioac52da62018-03-02 18:14:58 +0200231 0, max, GFP_KERNEL);
Chris Wilson5d1808e2016-04-28 09:56:51 +0100232 if (ret < 0)
233 return ret;
234 }
235
236 *out = ret;
237 return 0;
238}
239
Chris Wilson949e8ab2017-02-09 14:40:36 +0000240static u32 default_desc_template(const struct drm_i915_private *i915,
241 const struct i915_hw_ppgtt *ppgtt)
Mika Kuoppala2355cf02017-01-27 15:03:09 +0200242{
Chris Wilson949e8ab2017-02-09 14:40:36 +0000243 u32 address_mode;
Mika Kuoppala2355cf02017-01-27 15:03:09 +0200244 u32 desc;
245
Chris Wilson949e8ab2017-02-09 14:40:36 +0000246 desc = GEN8_CTX_VALID | GEN8_CTX_PRIVILEGE;
Mika Kuoppala2355cf02017-01-27 15:03:09 +0200247
Chris Wilson949e8ab2017-02-09 14:40:36 +0000248 address_mode = INTEL_LEGACY_32B_CONTEXT;
249 if (ppgtt && i915_vm_is_48bit(&ppgtt->base))
250 address_mode = INTEL_LEGACY_64B_CONTEXT;
251 desc |= address_mode << GEN8_CTX_ADDRESSING_MODE_SHIFT;
252
253 if (IS_GEN8(i915))
Mika Kuoppala2355cf02017-01-27 15:03:09 +0200254 desc |= GEN8_CTX_L3LLC_COHERENT;
255
256 /* TODO: WaDisableLiteRestore when we start using semaphore
257 * signalling between Command Streamers
258 * ring->ctx_desc_template |= GEN8_CTX_FORCE_RESTORE;
259 */
260
261 return desc;
262}
263
Chris Wilsone2efd132016-05-24 14:53:34 +0100264static struct i915_gem_context *
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000265__create_hw_context(struct drm_i915_private *dev_priv,
Daniel Vetteree960be2014-08-06 15:04:45 +0200266 struct drm_i915_file_private *file_priv)
Ben Widawsky40521052012-06-04 14:42:43 -0700267{
Chris Wilsone2efd132016-05-24 14:53:34 +0100268 struct i915_gem_context *ctx;
Tejun Heoc8c470a2013-02-27 17:04:10 -0800269 int ret;
Ben Widawsky40521052012-06-04 14:42:43 -0700270
Ben Widawskyf94982b2012-11-10 10:56:04 -0800271 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
Ben Widawsky146937e2012-06-29 10:30:39 -0700272 if (ctx == NULL)
273 return ERR_PTR(-ENOMEM);
Ben Widawsky40521052012-06-04 14:42:43 -0700274
Chris Wilson5d1808e2016-04-28 09:56:51 +0100275 ret = assign_hw_id(dev_priv, &ctx->hw_id);
276 if (ret) {
277 kfree(ctx);
278 return ERR_PTR(ret);
279 }
280
Mika Kuoppaladce32712013-04-30 13:30:33 +0300281 kref_init(&ctx->ref);
Chris Wilson829a0af2017-06-20 12:05:45 +0100282 list_add_tail(&ctx->link, &dev_priv->contexts.list);
Chris Wilson9ea4fee2015-05-05 09:17:29 +0100283 ctx->i915 = dev_priv;
Chris Wilsonb7268c52018-04-18 19:40:52 +0100284 ctx->sched.priority = I915_PRIORITY_NORMAL;
Ben Widawsky40521052012-06-04 14:42:43 -0700285
Chris Wilsond1b48c12017-08-16 09:52:08 +0100286 INIT_RADIX_TREE(&ctx->handles_vma, GFP_KERNEL);
287 INIT_LIST_HEAD(&ctx->handles_list);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100288
Chris Wilson691e6412014-04-09 09:07:36 +0100289 /* Default context will never have a file_priv */
Chris Wilson562f5d42016-10-28 13:58:54 +0100290 ret = DEFAULT_CONTEXT_HANDLE;
291 if (file_priv) {
Chris Wilson691e6412014-04-09 09:07:36 +0100292 ret = idr_alloc(&file_priv->context_idr, ctx,
Oscar Mateo821d66d2014-07-03 16:28:00 +0100293 DEFAULT_CONTEXT_HANDLE, 0, GFP_KERNEL);
Chris Wilson691e6412014-04-09 09:07:36 +0100294 if (ret < 0)
Chris Wilson4ff4b442017-06-16 15:05:16 +0100295 goto err_lut;
Chris Wilson562f5d42016-10-28 13:58:54 +0100296 }
297 ctx->user_handle = ret;
Mika Kuoppaladce32712013-04-30 13:30:33 +0300298
299 ctx->file_priv = file_priv;
Chris Wilson562f5d42016-10-28 13:58:54 +0100300 if (file_priv) {
Chris Wilsonc84455b2016-08-15 10:49:08 +0100301 ctx->pid = get_task_pid(current, PIDTYPE_PID);
Chris Wilson562f5d42016-10-28 13:58:54 +0100302 ctx->name = kasprintf(GFP_KERNEL, "%s[%d]/%x",
303 current->comm,
304 pid_nr(ctx->pid),
305 ctx->user_handle);
306 if (!ctx->name) {
307 ret = -ENOMEM;
308 goto err_pid;
309 }
310 }
Chris Wilsonc84455b2016-08-15 10:49:08 +0100311
Ben Widawsky3ccfd192013-09-18 19:03:18 -0700312 /* NB: Mark all slices as needing a remap so that when the context first
313 * loads it will restore whatever remap state already exists. If there
314 * is no remap info, it will be a NOP. */
Chris Wilsonb2e862d2016-04-28 09:56:41 +0100315 ctx->remap_slice = ALL_L3_SLICES(dev_priv);
Ben Widawsky40521052012-06-04 14:42:43 -0700316
Chris Wilson60958682016-12-31 11:20:11 +0000317 i915_gem_context_set_bannable(ctx);
Zhi Wangbcd794c2016-06-16 08:07:01 -0400318 ctx->ring_size = 4 * PAGE_SIZE;
Chris Wilson949e8ab2017-02-09 14:40:36 +0000319 ctx->desc_template =
320 default_desc_template(dev_priv, dev_priv->mm.aliasing_ppgtt);
Chris Wilson676fa572014-12-24 08:13:39 -0800321
Jackie Li6b0478f2018-03-13 17:32:50 -0700322 /*
323 * GuC requires the ring to be placed in Non-WOPCM memory. If GuC is not
Daniele Ceraolo Spuriod3ef1af2016-12-23 15:56:21 -0800324 * present or not in use we still need a small bias as ring wraparound
325 * at offset 0 sometimes hangs. No idea why.
326 */
Michal Wajdeczko93ffbe82017-12-06 13:53:12 +0000327 if (USES_GUC(dev_priv))
Jackie Li6b0478f2018-03-13 17:32:50 -0700328 ctx->ggtt_offset_bias = dev_priv->guc.ggtt_pin_bias;
Daniele Ceraolo Spuriod3ef1af2016-12-23 15:56:21 -0800329 else
Chris Wilsonf51455d2017-01-10 14:47:34 +0000330 ctx->ggtt_offset_bias = I915_GTT_PAGE_SIZE;
Daniele Ceraolo Spuriod3ef1af2016-12-23 15:56:21 -0800331
Ben Widawsky146937e2012-06-29 10:30:39 -0700332 return ctx;
Ben Widawsky40521052012-06-04 14:42:43 -0700333
Chris Wilson562f5d42016-10-28 13:58:54 +0100334err_pid:
335 put_pid(ctx->pid);
336 idr_remove(&file_priv->context_idr, ctx->user_handle);
Chris Wilson4ff4b442017-06-16 15:05:16 +0100337err_lut:
Chris Wilson50e046b2016-08-04 07:52:46 +0100338 context_close(ctx);
Ben Widawsky146937e2012-06-29 10:30:39 -0700339 return ERR_PTR(ret);
Ben Widawsky40521052012-06-04 14:42:43 -0700340}
341
Joonas Lahtinen6d1f9fb2017-02-09 13:34:25 +0200342static void __destroy_hw_context(struct i915_gem_context *ctx,
343 struct drm_i915_file_private *file_priv)
344{
345 idr_remove(&file_priv->context_idr, ctx->user_handle);
346 context_close(ctx);
347}
348
Chris Wilsone2efd132016-05-24 14:53:34 +0100349static struct i915_gem_context *
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000350i915_gem_create_context(struct drm_i915_private *dev_priv,
Daniel Vetterd624d862014-08-06 15:04:54 +0200351 struct drm_i915_file_private *file_priv)
Ben Widawsky254f9652012-06-04 14:42:42 -0700352{
Chris Wilsone2efd132016-05-24 14:53:34 +0100353 struct i915_gem_context *ctx;
Ben Widawsky40521052012-06-04 14:42:43 -0700354
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000355 lockdep_assert_held(&dev_priv->drm.struct_mutex);
Ben Widawsky40521052012-06-04 14:42:43 -0700356
Chris Wilsoncb0aeaa2017-07-05 15:26:34 +0100357 /* Reap the most stale context */
358 contexts_free_first(dev_priv);
Chris Wilsonddfc9252017-07-05 15:26:32 +0100359
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000360 ctx = __create_hw_context(dev_priv, file_priv);
Ben Widawsky146937e2012-06-29 10:30:39 -0700361 if (IS_ERR(ctx))
Ben Widawskya45d0f62013-12-06 14:11:05 -0800362 return ctx;
Ben Widawsky40521052012-06-04 14:42:43 -0700363
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000364 if (USES_FULL_PPGTT(dev_priv)) {
Chris Wilson80b204b2016-10-28 13:58:58 +0100365 struct i915_hw_ppgtt *ppgtt;
Ben Widawskybdf4fd72013-12-06 14:11:18 -0800366
Tvrtko Ursulinbf9e8422016-12-01 14:16:38 +0000367 ppgtt = i915_ppgtt_create(dev_priv, file_priv, ctx->name);
Chris Wilsonc6aab912016-05-24 14:53:38 +0100368 if (IS_ERR(ppgtt)) {
Ben Widawsky0eea67e2013-12-06 14:11:19 -0800369 DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n",
370 PTR_ERR(ppgtt));
Joonas Lahtinen6d1f9fb2017-02-09 13:34:25 +0200371 __destroy_hw_context(ctx, file_priv);
Chris Wilsonc6aab912016-05-24 14:53:38 +0100372 return ERR_CAST(ppgtt);
Daniel Vetterae6c4802014-08-06 15:04:53 +0200373 }
374
375 ctx->ppgtt = ppgtt;
Chris Wilson949e8ab2017-02-09 14:40:36 +0000376 ctx->desc_template = default_desc_template(dev_priv, ppgtt);
Daniel Vetterae6c4802014-08-06 15:04:53 +0200377 }
Ben Widawskybdf4fd72013-12-06 14:11:18 -0800378
Daniele Ceraolo Spurio198c9742014-11-10 13:44:31 +0000379 trace_i915_context_create(ctx);
380
Ben Widawskya45d0f62013-12-06 14:11:05 -0800381 return ctx;
Ben Widawsky254f9652012-06-04 14:42:42 -0700382}
383
Zhi Wangc8c35792016-06-16 08:07:05 -0400384/**
385 * i915_gem_context_create_gvt - create a GVT GEM context
386 * @dev: drm device *
387 *
388 * This function is used to create a GVT specific GEM context.
389 *
390 * Returns:
391 * pointer to i915_gem_context on success, error pointer if failed
392 *
393 */
394struct i915_gem_context *
395i915_gem_context_create_gvt(struct drm_device *dev)
396{
397 struct i915_gem_context *ctx;
398 int ret;
399
400 if (!IS_ENABLED(CONFIG_DRM_I915_GVT))
401 return ERR_PTR(-ENODEV);
402
403 ret = i915_mutex_lock_interruptible(dev);
404 if (ret)
405 return ERR_PTR(ret);
406
Chris Wilson984ff29f2017-01-06 15:20:13 +0000407 ctx = __create_hw_context(to_i915(dev), NULL);
Zhi Wangc8c35792016-06-16 08:07:05 -0400408 if (IS_ERR(ctx))
409 goto out;
410
Chris Wilson984ff29f2017-01-06 15:20:13 +0000411 ctx->file_priv = ERR_PTR(-EBADF);
Chris Wilson60958682016-12-31 11:20:11 +0000412 i915_gem_context_set_closed(ctx); /* not user accessible */
413 i915_gem_context_clear_bannable(ctx);
414 i915_gem_context_set_force_single_submission(ctx);
Michal Wajdeczko93ffbe82017-12-06 13:53:12 +0000415 if (!USES_GUC_SUBMISSION(to_i915(dev)))
Chuanxiao Dong718e8842017-02-16 14:36:40 +0800416 ctx->ring_size = 512 * PAGE_SIZE; /* Max ring buffer size */
Chris Wilson984ff29f2017-01-06 15:20:13 +0000417
418 GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
Zhi Wangc8c35792016-06-16 08:07:05 -0400419out:
420 mutex_unlock(&dev->struct_mutex);
421 return ctx;
422}
423
Chris Wilsond2b4b972017-11-10 14:26:33 +0000424struct i915_gem_context *
425i915_gem_context_create_kernel(struct drm_i915_private *i915, int prio)
Ben Widawsky254f9652012-06-04 14:42:42 -0700426{
Chris Wilsone2efd132016-05-24 14:53:34 +0100427 struct i915_gem_context *ctx;
Ben Widawsky254f9652012-06-04 14:42:42 -0700428
Chris Wilsone7af3112017-10-03 21:34:48 +0100429 ctx = i915_gem_create_context(i915, NULL);
430 if (IS_ERR(ctx))
431 return ctx;
432
433 i915_gem_context_clear_bannable(ctx);
Chris Wilsonb7268c52018-04-18 19:40:52 +0100434 ctx->sched.priority = prio;
Chris Wilsone7af3112017-10-03 21:34:48 +0100435 ctx->ring_size = PAGE_SIZE;
436
437 GEM_BUG_ON(!i915_gem_context_is_kernel(ctx));
438
439 return ctx;
440}
441
442static void
443destroy_kernel_context(struct i915_gem_context **ctxp)
444{
445 struct i915_gem_context *ctx;
446
447 /* Keep the context ref so that we can free it immediately ourselves */
448 ctx = i915_gem_context_get(fetch_and_zero(ctxp));
449 GEM_BUG_ON(!i915_gem_context_is_kernel(ctx));
450
451 context_close(ctx);
452 i915_gem_context_free(ctx);
453}
454
Chris Wilsond6376372018-02-07 21:05:44 +0000455static bool needs_preempt_context(struct drm_i915_private *i915)
456{
457 return HAS_LOGICAL_RING_PREEMPTION(i915);
458}
459
Chris Wilsone7af3112017-10-03 21:34:48 +0100460int i915_gem_contexts_init(struct drm_i915_private *dev_priv)
461{
462 struct i915_gem_context *ctx;
Oscar Mateo59b449d2018-04-10 09:12:47 -0700463 int ret;
Chris Wilsone7af3112017-10-03 21:34:48 +0100464
Chris Wilsond6376372018-02-07 21:05:44 +0000465 /* Reassure ourselves we are only called once */
Chris Wilsone7af3112017-10-03 21:34:48 +0100466 GEM_BUG_ON(dev_priv->kernel_context);
Chris Wilsond6376372018-02-07 21:05:44 +0000467 GEM_BUG_ON(dev_priv->preempt_context);
Ben Widawsky254f9652012-06-04 14:42:42 -0700468
Oscar Mateo59b449d2018-04-10 09:12:47 -0700469 ret = intel_ctx_workarounds_init(dev_priv);
470 if (ret)
471 return ret;
472
Chris Wilson829a0af2017-06-20 12:05:45 +0100473 INIT_LIST_HEAD(&dev_priv->contexts.list);
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100474 INIT_WORK(&dev_priv->contexts.free_work, contexts_free_worker);
475 init_llist_head(&dev_priv->contexts.free_list);
Chris Wilson829a0af2017-06-20 12:05:45 +0100476
Chris Wilson5d1808e2016-04-28 09:56:51 +0100477 /* Using the simple ida interface, the max is limited by sizeof(int) */
478 BUILD_BUG_ON(MAX_CONTEXT_HW_ID > INT_MAX);
Daniele Ceraolo Spurioac52da62018-03-02 18:14:58 +0200479 BUILD_BUG_ON(GEN11_MAX_CONTEXT_HW_ID > INT_MAX);
Chris Wilson829a0af2017-06-20 12:05:45 +0100480 ida_init(&dev_priv->contexts.hw_ida);
Chris Wilson5d1808e2016-04-28 09:56:51 +0100481
Chris Wilsone7af3112017-10-03 21:34:48 +0100482 /* lowest priority; idle task */
Chris Wilsond2b4b972017-11-10 14:26:33 +0000483 ctx = i915_gem_context_create_kernel(dev_priv, I915_PRIORITY_MIN);
Chris Wilson691e6412014-04-09 09:07:36 +0100484 if (IS_ERR(ctx)) {
Chris Wilsone7af3112017-10-03 21:34:48 +0100485 DRM_ERROR("Failed to create default global context\n");
Chris Wilsond6376372018-02-07 21:05:44 +0000486 return PTR_ERR(ctx);
Ben Widawsky254f9652012-06-04 14:42:42 -0700487 }
Chris Wilsone7af3112017-10-03 21:34:48 +0100488 /*
489 * For easy recognisablity, we want the kernel context to be 0 and then
Chris Wilson5d12fce2017-01-23 11:31:31 +0000490 * all user contexts will have non-zero hw_id.
491 */
492 GEM_BUG_ON(ctx->hw_id);
Dave Gordoned54c1a2016-01-19 19:02:54 +0000493 dev_priv->kernel_context = ctx;
Oscar Mateoede7d422014-07-24 17:04:12 +0100494
Chris Wilsone7af3112017-10-03 21:34:48 +0100495 /* highest priority; preempting task */
Chris Wilsond6376372018-02-07 21:05:44 +0000496 if (needs_preempt_context(dev_priv)) {
497 ctx = i915_gem_context_create_kernel(dev_priv, INT_MAX);
498 if (!IS_ERR(ctx))
499 dev_priv->preempt_context = ctx;
500 else
501 DRM_ERROR("Failed to create preempt context; disabling preemption\n");
Chris Wilsone7af3112017-10-03 21:34:48 +0100502 }
Chris Wilson984ff29f2017-01-06 15:20:13 +0000503
Oscar Mateoede7d422014-07-24 17:04:12 +0100504 DRM_DEBUG_DRIVER("%s context support initialized\n",
Joonas Lahtinen63ffbcd2017-04-28 10:53:36 +0300505 dev_priv->engine[RCS]->context_size ? "logical" :
506 "fake");
Ben Widawsky8245be32013-11-06 13:56:29 -0200507 return 0;
Ben Widawsky254f9652012-06-04 14:42:42 -0700508}
509
Chris Wilson829a0af2017-06-20 12:05:45 +0100510void i915_gem_contexts_lost(struct drm_i915_private *dev_priv)
Chris Wilsonb2e862d2016-04-28 09:56:41 +0100511{
512 struct intel_engine_cs *engine;
Akash Goel3b3f1652016-10-13 22:44:48 +0530513 enum intel_engine_id id;
Chris Wilsonb2e862d2016-04-28 09:56:41 +0100514
Chris Wilson91c8a322016-07-05 10:40:23 +0100515 lockdep_assert_held(&dev_priv->drm.struct_mutex);
Chris Wilson499f2692016-05-24 14:53:35 +0100516
Akash Goel3b3f1652016-10-13 22:44:48 +0530517 for_each_engine(engine, dev_priv, id) {
Chris Wilsone8a9c582016-12-18 15:37:20 +0000518 engine->legacy_active_context = NULL;
Chris Wilsonb1c24a62017-11-23 15:26:30 +0000519 engine->legacy_active_ppgtt = NULL;
Chris Wilsone8a9c582016-12-18 15:37:20 +0000520
521 if (!engine->last_retired_context)
522 continue;
523
Chris Wilsonab82a062018-04-30 14:15:01 +0100524 intel_context_unpin(engine->last_retired_context, engine);
Chris Wilsone8a9c582016-12-18 15:37:20 +0000525 engine->last_retired_context = NULL;
Chris Wilsonb2e862d2016-04-28 09:56:41 +0100526 }
Chris Wilsonb2e862d2016-04-28 09:56:41 +0100527}
528
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100529void i915_gem_contexts_fini(struct drm_i915_private *i915)
Ben Widawsky254f9652012-06-04 14:42:42 -0700530{
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100531 lockdep_assert_held(&i915->drm.struct_mutex);
Chris Wilson499f2692016-05-24 14:53:35 +0100532
Chris Wilsond6376372018-02-07 21:05:44 +0000533 if (i915->preempt_context)
534 destroy_kernel_context(&i915->preempt_context);
Chris Wilsone7af3112017-10-03 21:34:48 +0100535 destroy_kernel_context(&i915->kernel_context);
Chris Wilson984ff29f2017-01-06 15:20:13 +0000536
Chris Wilson5f09a9c2017-06-20 12:05:46 +0100537 /* Must free all deferred contexts (via flush_workqueue) first */
538 ida_destroy(&i915->contexts.hw_ida);
Ben Widawsky254f9652012-06-04 14:42:42 -0700539}
540
Ben Widawsky40521052012-06-04 14:42:43 -0700541static int context_idr_cleanup(int id, void *p, void *data)
542{
Chris Wilsone2efd132016-05-24 14:53:34 +0100543 struct i915_gem_context *ctx = p;
Ben Widawsky40521052012-06-04 14:42:43 -0700544
Chris Wilson50e046b2016-08-04 07:52:46 +0100545 context_close(ctx);
Ben Widawsky40521052012-06-04 14:42:43 -0700546 return 0;
Ben Widawsky254f9652012-06-04 14:42:42 -0700547}
548
Chris Wilson829a0af2017-06-20 12:05:45 +0100549int i915_gem_context_open(struct drm_i915_private *i915,
550 struct drm_file *file)
Ben Widawskye422b882013-12-06 14:10:58 -0800551{
552 struct drm_i915_file_private *file_priv = file->driver_priv;
Chris Wilsone2efd132016-05-24 14:53:34 +0100553 struct i915_gem_context *ctx;
Ben Widawskye422b882013-12-06 14:10:58 -0800554
555 idr_init(&file_priv->context_idr);
556
Chris Wilson829a0af2017-06-20 12:05:45 +0100557 mutex_lock(&i915->drm.struct_mutex);
558 ctx = i915_gem_create_context(i915, file_priv);
559 mutex_unlock(&i915->drm.struct_mutex);
Oscar Mateof83d6512014-05-22 14:13:38 +0100560 if (IS_ERR(ctx)) {
Ben Widawsky0eea67e2013-12-06 14:11:19 -0800561 idr_destroy(&file_priv->context_idr);
Oscar Mateof83d6512014-05-22 14:13:38 +0100562 return PTR_ERR(ctx);
Ben Widawsky0eea67e2013-12-06 14:11:19 -0800563 }
564
Chris Wilsone4d5dc22017-07-05 15:26:31 +0100565 GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
566
Ben Widawskye422b882013-12-06 14:10:58 -0800567 return 0;
568}
569
Chris Wilson829a0af2017-06-20 12:05:45 +0100570void i915_gem_context_close(struct drm_file *file)
Ben Widawsky254f9652012-06-04 14:42:42 -0700571{
Ben Widawsky40521052012-06-04 14:42:43 -0700572 struct drm_i915_file_private *file_priv = file->driver_priv;
Ben Widawsky254f9652012-06-04 14:42:42 -0700573
Chris Wilson829a0af2017-06-20 12:05:45 +0100574 lockdep_assert_held(&file_priv->dev_priv->drm.struct_mutex);
Chris Wilson499f2692016-05-24 14:53:35 +0100575
Daniel Vetter73c273e2012-06-19 20:27:39 +0200576 idr_for_each(&file_priv->context_idr, context_idr_cleanup, NULL);
Ben Widawsky40521052012-06-04 14:42:43 -0700577 idr_destroy(&file_priv->context_idr);
Ben Widawsky40521052012-06-04 14:42:43 -0700578}
579
Chris Wilsona89d1f92018-05-02 17:38:39 +0100580static struct i915_request *
581last_request_on_engine(struct i915_timeline *timeline,
582 struct intel_engine_cs *engine)
583{
584 struct i915_request *rq;
585
586 if (timeline == &engine->timeline)
587 return NULL;
588
589 rq = i915_gem_active_raw(&timeline->last_request,
590 &engine->i915->drm.struct_mutex);
591 if (rq && rq->engine == engine)
592 return rq;
593
594 return NULL;
595}
596
Chris Wilson20ccd4d2017-10-24 23:08:55 +0100597static bool engine_has_idle_kernel_context(struct intel_engine_cs *engine)
Chris Wilsonf131e352016-12-29 14:40:37 +0000598{
Chris Wilsona89d1f92018-05-02 17:38:39 +0100599 struct i915_timeline *timeline;
Chris Wilsonf131e352016-12-29 14:40:37 +0000600
601 list_for_each_entry(timeline, &engine->i915->gt.timelines, link) {
Chris Wilsona89d1f92018-05-02 17:38:39 +0100602 if (last_request_on_engine(timeline, engine))
Chris Wilsonf131e352016-12-29 14:40:37 +0000603 return false;
604 }
605
Chris Wilson20ccd4d2017-10-24 23:08:55 +0100606 return intel_engine_has_kernel_context(engine);
Chris Wilsonf131e352016-12-29 14:40:37 +0000607}
608
Chris Wilson945657b2016-07-15 14:56:19 +0100609int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv)
610{
611 struct intel_engine_cs *engine;
Chris Wilsona89d1f92018-05-02 17:38:39 +0100612 struct i915_timeline *timeline;
Akash Goel3b3f1652016-10-13 22:44:48 +0530613 enum intel_engine_id id;
Chris Wilson945657b2016-07-15 14:56:19 +0100614
Chris Wilson3033aca2016-10-28 13:58:47 +0100615 lockdep_assert_held(&dev_priv->drm.struct_mutex);
616
Chris Wilsone61e0f52018-02-21 09:56:36 +0000617 i915_retire_requests(dev_priv);
Chris Wilsonf131e352016-12-29 14:40:37 +0000618
Akash Goel3b3f1652016-10-13 22:44:48 +0530619 for_each_engine(engine, dev_priv, id) {
Chris Wilsone61e0f52018-02-21 09:56:36 +0000620 struct i915_request *rq;
Chris Wilson945657b2016-07-15 14:56:19 +0100621
Chris Wilson20ccd4d2017-10-24 23:08:55 +0100622 if (engine_has_idle_kernel_context(engine))
Chris Wilsonf131e352016-12-29 14:40:37 +0000623 continue;
624
Chris Wilsone61e0f52018-02-21 09:56:36 +0000625 rq = i915_request_alloc(engine, dev_priv->kernel_context);
626 if (IS_ERR(rq))
627 return PTR_ERR(rq);
Chris Wilson945657b2016-07-15 14:56:19 +0100628
Chris Wilson3033aca2016-10-28 13:58:47 +0100629 /* Queue this switch after all other activity */
630 list_for_each_entry(timeline, &dev_priv->gt.timelines, link) {
Chris Wilsone61e0f52018-02-21 09:56:36 +0000631 struct i915_request *prev;
Chris Wilson3033aca2016-10-28 13:58:47 +0100632
Chris Wilsona89d1f92018-05-02 17:38:39 +0100633 prev = last_request_on_engine(timeline, engine);
Chris Wilson3033aca2016-10-28 13:58:47 +0100634 if (prev)
Chris Wilsone61e0f52018-02-21 09:56:36 +0000635 i915_sw_fence_await_sw_fence_gfp(&rq->submit,
Chris Wilson3033aca2016-10-28 13:58:47 +0100636 &prev->submit,
Chris Wilson2abe2f82017-12-12 18:06:51 +0000637 I915_FENCE_GFP);
Chris Wilson3033aca2016-10-28 13:58:47 +0100638 }
639
Chris Wilsonc82297f2017-11-26 21:48:56 +0000640 /*
641 * Force a flush after the switch to ensure that all rendering
642 * and operations prior to switching to the kernel context hits
643 * memory. This should be guaranteed by the previous request,
644 * but an extra layer of paranoia before we declare the system
645 * idle (on suspend etc) is advisable!
646 */
Chris Wilsone61e0f52018-02-21 09:56:36 +0000647 __i915_request_add(rq, true);
Chris Wilson945657b2016-07-15 14:56:19 +0100648 }
649
650 return 0;
651}
652
Mika Kuoppalab083a082016-11-18 15:10:47 +0200653static bool client_is_banned(struct drm_i915_file_private *file_priv)
654{
Chris Wilson77b25a92017-07-21 13:32:30 +0100655 return atomic_read(&file_priv->context_bans) > I915_MAX_CLIENT_CONTEXT_BANS;
Mika Kuoppalab083a082016-11-18 15:10:47 +0200656}
657
Ben Widawsky84624812012-06-04 14:42:54 -0700658int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
659 struct drm_file *file)
660{
Joonas Lahtinen63ffbcd2017-04-28 10:53:36 +0300661 struct drm_i915_private *dev_priv = to_i915(dev);
Ben Widawsky84624812012-06-04 14:42:54 -0700662 struct drm_i915_gem_context_create *args = data;
663 struct drm_i915_file_private *file_priv = file->driver_priv;
Chris Wilsone2efd132016-05-24 14:53:34 +0100664 struct i915_gem_context *ctx;
Ben Widawsky84624812012-06-04 14:42:54 -0700665 int ret;
666
Joonas Lahtinen63ffbcd2017-04-28 10:53:36 +0300667 if (!dev_priv->engine[RCS]->context_size)
Daniel Vetter5fa8be62012-06-19 17:16:01 +0200668 return -ENODEV;
669
Chris Wilsonb31e5132016-02-05 16:45:59 +0000670 if (args->pad != 0)
671 return -EINVAL;
672
Mika Kuoppalab083a082016-11-18 15:10:47 +0200673 if (client_is_banned(file_priv)) {
674 DRM_DEBUG("client %s[%d] banned from creating ctx\n",
675 current->comm,
676 pid_nr(get_task_pid(current, PIDTYPE_PID)));
677
678 return -EIO;
679 }
680
Ben Widawsky84624812012-06-04 14:42:54 -0700681 ret = i915_mutex_lock_interruptible(dev);
682 if (ret)
683 return ret;
684
Joonas Lahtinen63ffbcd2017-04-28 10:53:36 +0300685 ctx = i915_gem_create_context(dev_priv, file_priv);
Ben Widawsky84624812012-06-04 14:42:54 -0700686 mutex_unlock(&dev->struct_mutex);
Dan Carpenterbe636382012-07-17 09:44:49 +0300687 if (IS_ERR(ctx))
688 return PTR_ERR(ctx);
Ben Widawsky84624812012-06-04 14:42:54 -0700689
Chris Wilson984ff29f2017-01-06 15:20:13 +0000690 GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
691
Oscar Mateo821d66d2014-07-03 16:28:00 +0100692 args->ctx_id = ctx->user_handle;
Chris Wilsonb84cf532016-11-21 11:31:09 +0000693 DRM_DEBUG("HW context %d created\n", args->ctx_id);
Ben Widawsky84624812012-06-04 14:42:54 -0700694
Dan Carpenterbe636382012-07-17 09:44:49 +0300695 return 0;
Ben Widawsky84624812012-06-04 14:42:54 -0700696}
697
698int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
699 struct drm_file *file)
700{
701 struct drm_i915_gem_context_destroy *args = data;
702 struct drm_i915_file_private *file_priv = file->driver_priv;
Chris Wilsone2efd132016-05-24 14:53:34 +0100703 struct i915_gem_context *ctx;
Ben Widawsky84624812012-06-04 14:42:54 -0700704 int ret;
705
Chris Wilsonb31e5132016-02-05 16:45:59 +0000706 if (args->pad != 0)
707 return -EINVAL;
708
Oscar Mateo821d66d2014-07-03 16:28:00 +0100709 if (args->ctx_id == DEFAULT_CONTEXT_HANDLE)
Ben Widawskyc2cf2412013-12-24 16:02:54 -0800710 return -ENOENT;
Ben Widawsky0eea67e2013-12-06 14:11:19 -0800711
Chris Wilsonca585b52016-05-24 14:53:36 +0100712 ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
Chris Wilson1acfc102017-06-20 12:05:47 +0100713 if (!ctx)
714 return -ENOENT;
715
716 ret = mutex_lock_interruptible(&dev->struct_mutex);
717 if (ret)
718 goto out;
Ben Widawsky84624812012-06-04 14:42:54 -0700719
Joonas Lahtinen6d1f9fb2017-02-09 13:34:25 +0200720 __destroy_hw_context(ctx, file_priv);
Ben Widawsky84624812012-06-04 14:42:54 -0700721 mutex_unlock(&dev->struct_mutex);
722
Chris Wilson1acfc102017-06-20 12:05:47 +0100723out:
724 i915_gem_context_put(ctx);
Ben Widawsky84624812012-06-04 14:42:54 -0700725 return 0;
726}
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800727
728int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
729 struct drm_file *file)
730{
731 struct drm_i915_file_private *file_priv = file->driver_priv;
732 struct drm_i915_gem_context_param *args = data;
Chris Wilsone2efd132016-05-24 14:53:34 +0100733 struct i915_gem_context *ctx;
Chris Wilson1acfc102017-06-20 12:05:47 +0100734 int ret = 0;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800735
Chris Wilsonca585b52016-05-24 14:53:36 +0100736 ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
Chris Wilson1acfc102017-06-20 12:05:47 +0100737 if (!ctx)
738 return -ENOENT;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800739
740 args->size = 0;
741 switch (args->param) {
742 case I915_CONTEXT_PARAM_BAN_PERIOD:
Mika Kuoppala84102172016-11-16 17:20:32 +0200743 ret = -EINVAL;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800744 break;
David Weinehallb1b38272015-05-20 17:00:13 +0300745 case I915_CONTEXT_PARAM_NO_ZEROMAP:
746 args->value = ctx->flags & CONTEXT_NO_ZEROMAP;
747 break;
Chris Wilsonfa8848f2015-10-14 14:17:11 +0100748 case I915_CONTEXT_PARAM_GTT_SIZE:
749 if (ctx->ppgtt)
750 args->value = ctx->ppgtt->base.total;
751 else if (to_i915(dev)->mm.aliasing_ppgtt)
752 args->value = to_i915(dev)->mm.aliasing_ppgtt->base.total;
753 else
Joonas Lahtinen62106b42016-03-18 10:42:57 +0200754 args->value = to_i915(dev)->ggtt.base.total;
Chris Wilsonfa8848f2015-10-14 14:17:11 +0100755 break;
Chris Wilsonbc3d6742016-07-04 08:08:39 +0100756 case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
Chris Wilson60958682016-12-31 11:20:11 +0000757 args->value = i915_gem_context_no_error_capture(ctx);
Chris Wilsonbc3d6742016-07-04 08:08:39 +0100758 break;
Mika Kuoppala84102172016-11-16 17:20:32 +0200759 case I915_CONTEXT_PARAM_BANNABLE:
Chris Wilson60958682016-12-31 11:20:11 +0000760 args->value = i915_gem_context_is_bannable(ctx);
Mika Kuoppala84102172016-11-16 17:20:32 +0200761 break;
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100762 case I915_CONTEXT_PARAM_PRIORITY:
Chris Wilsonb7268c52018-04-18 19:40:52 +0100763 args->value = ctx->sched.priority;
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100764 break;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800765 default:
766 ret = -EINVAL;
767 break;
768 }
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800769
Chris Wilson1acfc102017-06-20 12:05:47 +0100770 i915_gem_context_put(ctx);
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800771 return ret;
772}
773
774int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
775 struct drm_file *file)
776{
777 struct drm_i915_file_private *file_priv = file->driver_priv;
778 struct drm_i915_gem_context_param *args = data;
Chris Wilsone2efd132016-05-24 14:53:34 +0100779 struct i915_gem_context *ctx;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800780 int ret;
781
Chris Wilson1acfc102017-06-20 12:05:47 +0100782 ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
783 if (!ctx)
784 return -ENOENT;
785
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800786 ret = i915_mutex_lock_interruptible(dev);
787 if (ret)
Chris Wilson1acfc102017-06-20 12:05:47 +0100788 goto out;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800789
790 switch (args->param) {
791 case I915_CONTEXT_PARAM_BAN_PERIOD:
Mika Kuoppala84102172016-11-16 17:20:32 +0200792 ret = -EINVAL;
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800793 break;
David Weinehallb1b38272015-05-20 17:00:13 +0300794 case I915_CONTEXT_PARAM_NO_ZEROMAP:
795 if (args->size) {
796 ret = -EINVAL;
797 } else {
798 ctx->flags &= ~CONTEXT_NO_ZEROMAP;
799 ctx->flags |= args->value ? CONTEXT_NO_ZEROMAP : 0;
800 }
801 break;
Chris Wilsonbc3d6742016-07-04 08:08:39 +0100802 case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
Chris Wilson60958682016-12-31 11:20:11 +0000803 if (args->size)
Chris Wilsonbc3d6742016-07-04 08:08:39 +0100804 ret = -EINVAL;
Chris Wilson60958682016-12-31 11:20:11 +0000805 else if (args->value)
806 i915_gem_context_set_no_error_capture(ctx);
807 else
808 i915_gem_context_clear_no_error_capture(ctx);
Chris Wilsonbc3d6742016-07-04 08:08:39 +0100809 break;
Mika Kuoppala84102172016-11-16 17:20:32 +0200810 case I915_CONTEXT_PARAM_BANNABLE:
811 if (args->size)
812 ret = -EINVAL;
813 else if (!capable(CAP_SYS_ADMIN) && !args->value)
814 ret = -EPERM;
Chris Wilson60958682016-12-31 11:20:11 +0000815 else if (args->value)
816 i915_gem_context_set_bannable(ctx);
Mika Kuoppala84102172016-11-16 17:20:32 +0200817 else
Chris Wilson60958682016-12-31 11:20:11 +0000818 i915_gem_context_clear_bannable(ctx);
Mika Kuoppala84102172016-11-16 17:20:32 +0200819 break;
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100820
821 case I915_CONTEXT_PARAM_PRIORITY:
822 {
Chris Wilson11a18f62018-02-08 08:51:51 +0000823 s64 priority = args->value;
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100824
825 if (args->size)
826 ret = -EINVAL;
Chris Wilson3fed1802018-02-07 21:05:43 +0000827 else if (!(to_i915(dev)->caps.scheduler & I915_SCHEDULER_CAP_PRIORITY))
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100828 ret = -ENODEV;
829 else if (priority > I915_CONTEXT_MAX_USER_PRIORITY ||
830 priority < I915_CONTEXT_MIN_USER_PRIORITY)
831 ret = -EINVAL;
832 else if (priority > I915_CONTEXT_DEFAULT_PRIORITY &&
833 !capable(CAP_SYS_NICE))
834 ret = -EPERM;
835 else
Chris Wilsonb7268c52018-04-18 19:40:52 +0100836 ctx->sched.priority = priority;
Chris Wilsonac14fbd2017-10-03 21:34:53 +0100837 }
838 break;
839
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800840 default:
841 ret = -EINVAL;
842 break;
843 }
844 mutex_unlock(&dev->struct_mutex);
845
Chris Wilson1acfc102017-06-20 12:05:47 +0100846out:
847 i915_gem_context_put(ctx);
Chris Wilsonc9dc0f32014-12-24 08:13:40 -0800848 return ret;
849}
Chris Wilsond5387042016-05-13 11:57:19 +0100850
851int i915_gem_context_reset_stats_ioctl(struct drm_device *dev,
852 void *data, struct drm_file *file)
853{
Chris Wilsonfac5e232016-07-04 11:34:36 +0100854 struct drm_i915_private *dev_priv = to_i915(dev);
Chris Wilsond5387042016-05-13 11:57:19 +0100855 struct drm_i915_reset_stats *args = data;
Chris Wilsone2efd132016-05-24 14:53:34 +0100856 struct i915_gem_context *ctx;
Chris Wilsond5387042016-05-13 11:57:19 +0100857 int ret;
858
859 if (args->flags || args->pad)
860 return -EINVAL;
861
Chris Wilson1acfc102017-06-20 12:05:47 +0100862 ret = -ENOENT;
863 rcu_read_lock();
864 ctx = __i915_gem_context_lookup_rcu(file->driver_priv, args->ctx_id);
865 if (!ctx)
866 goto out;
Chris Wilsond5387042016-05-13 11:57:19 +0100867
Chris Wilson1acfc102017-06-20 12:05:47 +0100868 /*
869 * We opt for unserialised reads here. This may result in tearing
870 * in the extremely unlikely event of a GPU hang on this context
871 * as we are querying them. If we need that extra layer of protection,
872 * we should wrap the hangstats with a seqlock.
873 */
Chris Wilsond5387042016-05-13 11:57:19 +0100874
875 if (capable(CAP_SYS_ADMIN))
876 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
877 else
878 args->reset_count = 0;
879
Chris Wilson77b25a92017-07-21 13:32:30 +0100880 args->batch_active = atomic_read(&ctx->guilty_count);
881 args->batch_pending = atomic_read(&ctx->active_count);
Chris Wilsond5387042016-05-13 11:57:19 +0100882
Chris Wilson1acfc102017-06-20 12:05:47 +0100883 ret = 0;
884out:
885 rcu_read_unlock();
886 return ret;
Chris Wilsond5387042016-05-13 11:57:19 +0100887}
Chris Wilson0daf0112017-02-13 17:15:19 +0000888
889#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
890#include "selftests/mock_context.c"
Chris Wilson791ff392017-02-13 17:15:49 +0000891#include "selftests/i915_gem_context.c"
Chris Wilson0daf0112017-02-13 17:15:19 +0000892#endif