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b20385f1 OM |
1 | /* |
2 | * Copyright © 2014 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 | * Michel Thierry <michel.thierry@intel.com> | |
26 | * Thomas Daniel <thomas.daniel@intel.com> | |
27 | * Oscar Mateo <oscar.mateo@intel.com> | |
28 | * | |
29 | */ | |
30 | ||
73e4d07f OM |
31 | /** |
32 | * DOC: Logical Rings, Logical Ring Contexts and Execlists | |
33 | * | |
34 | * Motivation: | |
b20385f1 OM |
35 | * GEN8 brings an expansion of the HW contexts: "Logical Ring Contexts". |
36 | * These expanded contexts enable a number of new abilities, especially | |
37 | * "Execlists" (also implemented in this file). | |
38 | * | |
73e4d07f OM |
39 | * One of the main differences with the legacy HW contexts is that logical |
40 | * ring contexts incorporate many more things to the context's state, like | |
41 | * PDPs or ringbuffer control registers: | |
42 | * | |
43 | * The reason why PDPs are included in the context is straightforward: as | |
44 | * PPGTTs (per-process GTTs) are actually per-context, having the PDPs | |
45 | * contained there mean you don't need to do a ppgtt->switch_mm yourself, | |
46 | * instead, the GPU will do it for you on the context switch. | |
47 | * | |
48 | * But, what about the ringbuffer control registers (head, tail, etc..)? | |
49 | * shouldn't we just need a set of those per engine command streamer? This is | |
50 | * where the name "Logical Rings" starts to make sense: by virtualizing the | |
51 | * rings, the engine cs shifts to a new "ring buffer" with every context | |
52 | * switch. When you want to submit a workload to the GPU you: A) choose your | |
53 | * context, B) find its appropriate virtualized ring, C) write commands to it | |
54 | * and then, finally, D) tell the GPU to switch to that context. | |
55 | * | |
56 | * Instead of the legacy MI_SET_CONTEXT, the way you tell the GPU to switch | |
57 | * to a contexts is via a context execution list, ergo "Execlists". | |
58 | * | |
59 | * LRC implementation: | |
60 | * Regarding the creation of contexts, we have: | |
61 | * | |
62 | * - One global default context. | |
63 | * - One local default context for each opened fd. | |
64 | * - One local extra context for each context create ioctl call. | |
65 | * | |
66 | * Now that ringbuffers belong per-context (and not per-engine, like before) | |
67 | * and that contexts are uniquely tied to a given engine (and not reusable, | |
68 | * like before) we need: | |
69 | * | |
70 | * - One ringbuffer per-engine inside each context. | |
71 | * - One backing object per-engine inside each context. | |
72 | * | |
73 | * The global default context starts its life with these new objects fully | |
74 | * allocated and populated. The local default context for each opened fd is | |
75 | * more complex, because we don't know at creation time which engine is going | |
76 | * to use them. To handle this, we have implemented a deferred creation of LR | |
77 | * contexts: | |
78 | * | |
79 | * The local context starts its life as a hollow or blank holder, that only | |
80 | * gets populated for a given engine once we receive an execbuffer. If later | |
81 | * on we receive another execbuffer ioctl for the same context but a different | |
82 | * engine, we allocate/populate a new ringbuffer and context backing object and | |
83 | * so on. | |
84 | * | |
85 | * Finally, regarding local contexts created using the ioctl call: as they are | |
86 | * only allowed with the render ring, we can allocate & populate them right | |
87 | * away (no need to defer anything, at least for now). | |
88 | * | |
89 | * Execlists implementation: | |
b20385f1 OM |
90 | * Execlists are the new method by which, on gen8+ hardware, workloads are |
91 | * submitted for execution (as opposed to the legacy, ringbuffer-based, method). | |
73e4d07f OM |
92 | * This method works as follows: |
93 | * | |
94 | * When a request is committed, its commands (the BB start and any leading or | |
95 | * trailing commands, like the seqno breadcrumbs) are placed in the ringbuffer | |
96 | * for the appropriate context. The tail pointer in the hardware context is not | |
97 | * updated at this time, but instead, kept by the driver in the ringbuffer | |
98 | * structure. A structure representing this request is added to a request queue | |
99 | * for the appropriate engine: this structure contains a copy of the context's | |
100 | * tail after the request was written to the ring buffer and a pointer to the | |
101 | * context itself. | |
102 | * | |
103 | * If the engine's request queue was empty before the request was added, the | |
104 | * queue is processed immediately. Otherwise the queue will be processed during | |
105 | * a context switch interrupt. In any case, elements on the queue will get sent | |
106 | * (in pairs) to the GPU's ExecLists Submit Port (ELSP, for short) with a | |
107 | * globally unique 20-bits submission ID. | |
108 | * | |
109 | * When execution of a request completes, the GPU updates the context status | |
110 | * buffer with a context complete event and generates a context switch interrupt. | |
111 | * During the interrupt handling, the driver examines the events in the buffer: | |
112 | * for each context complete event, if the announced ID matches that on the head | |
113 | * of the request queue, then that request is retired and removed from the queue. | |
114 | * | |
115 | * After processing, if any requests were retired and the queue is not empty | |
116 | * then a new execution list can be submitted. The two requests at the front of | |
117 | * the queue are next to be submitted but since a context may not occur twice in | |
118 | * an execution list, if subsequent requests have the same ID as the first then | |
119 | * the two requests must be combined. This is done simply by discarding requests | |
120 | * at the head of the queue until either only one requests is left (in which case | |
121 | * we use a NULL second context) or the first two requests have unique IDs. | |
122 | * | |
123 | * By always executing the first two requests in the queue the driver ensures | |
124 | * that the GPU is kept as busy as possible. In the case where a single context | |
125 | * completes but a second context is still executing, the request for this second | |
126 | * context will be at the head of the queue when we remove the first one. This | |
127 | * request will then be resubmitted along with a new request for a different context, | |
128 | * which will cause the hardware to continue executing the second request and queue | |
129 | * the new request (the GPU detects the condition of a context getting preempted | |
130 | * with the same context and optimizes the context switch flow by not doing | |
131 | * preemption, but just sampling the new tail pointer). | |
132 | * | |
b20385f1 OM |
133 | */ |
134 | ||
135 | #include <drm/drmP.h> | |
136 | #include <drm/i915_drm.h> | |
137 | #include "i915_drv.h" | |
127f1003 | 138 | |
468c6816 | 139 | #define GEN9_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) |
8c857917 OM |
140 | #define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE) |
141 | #define GEN8_LR_CONTEXT_OTHER_SIZE (2 * PAGE_SIZE) | |
142 | ||
e981e7b1 TD |
143 | #define RING_EXECLIST_QFULL (1 << 0x2) |
144 | #define RING_EXECLIST1_VALID (1 << 0x3) | |
145 | #define RING_EXECLIST0_VALID (1 << 0x4) | |
146 | #define RING_EXECLIST_ACTIVE_STATUS (3 << 0xE) | |
147 | #define RING_EXECLIST1_ACTIVE (1 << 0x11) | |
148 | #define RING_EXECLIST0_ACTIVE (1 << 0x12) | |
149 | ||
150 | #define GEN8_CTX_STATUS_IDLE_ACTIVE (1 << 0) | |
151 | #define GEN8_CTX_STATUS_PREEMPTED (1 << 1) | |
152 | #define GEN8_CTX_STATUS_ELEMENT_SWITCH (1 << 2) | |
153 | #define GEN8_CTX_STATUS_ACTIVE_IDLE (1 << 3) | |
154 | #define GEN8_CTX_STATUS_COMPLETE (1 << 4) | |
155 | #define GEN8_CTX_STATUS_LITE_RESTORE (1 << 15) | |
8670d6f9 OM |
156 | |
157 | #define CTX_LRI_HEADER_0 0x01 | |
158 | #define CTX_CONTEXT_CONTROL 0x02 | |
159 | #define CTX_RING_HEAD 0x04 | |
160 | #define CTX_RING_TAIL 0x06 | |
161 | #define CTX_RING_BUFFER_START 0x08 | |
162 | #define CTX_RING_BUFFER_CONTROL 0x0a | |
163 | #define CTX_BB_HEAD_U 0x0c | |
164 | #define CTX_BB_HEAD_L 0x0e | |
165 | #define CTX_BB_STATE 0x10 | |
166 | #define CTX_SECOND_BB_HEAD_U 0x12 | |
167 | #define CTX_SECOND_BB_HEAD_L 0x14 | |
168 | #define CTX_SECOND_BB_STATE 0x16 | |
169 | #define CTX_BB_PER_CTX_PTR 0x18 | |
170 | #define CTX_RCS_INDIRECT_CTX 0x1a | |
171 | #define CTX_RCS_INDIRECT_CTX_OFFSET 0x1c | |
172 | #define CTX_LRI_HEADER_1 0x21 | |
173 | #define CTX_CTX_TIMESTAMP 0x22 | |
174 | #define CTX_PDP3_UDW 0x24 | |
175 | #define CTX_PDP3_LDW 0x26 | |
176 | #define CTX_PDP2_UDW 0x28 | |
177 | #define CTX_PDP2_LDW 0x2a | |
178 | #define CTX_PDP1_UDW 0x2c | |
179 | #define CTX_PDP1_LDW 0x2e | |
180 | #define CTX_PDP0_UDW 0x30 | |
181 | #define CTX_PDP0_LDW 0x32 | |
182 | #define CTX_LRI_HEADER_2 0x41 | |
183 | #define CTX_R_PWR_CLK_STATE 0x42 | |
184 | #define CTX_GPGPU_CSR_BASE_ADDRESS 0x44 | |
185 | ||
84b790f8 BW |
186 | #define GEN8_CTX_VALID (1<<0) |
187 | #define GEN8_CTX_FORCE_PD_RESTORE (1<<1) | |
188 | #define GEN8_CTX_FORCE_RESTORE (1<<2) | |
189 | #define GEN8_CTX_L3LLC_COHERENT (1<<5) | |
190 | #define GEN8_CTX_PRIVILEGE (1<<8) | |
e5815a2e MT |
191 | |
192 | #define ASSIGN_CTX_PDP(ppgtt, reg_state, n) { \ | |
d852c7bf | 193 | const u64 _addr = i915_page_dir_dma_addr((ppgtt), (n)); \ |
e5815a2e MT |
194 | reg_state[CTX_PDP ## n ## _UDW+1] = upper_32_bits(_addr); \ |
195 | reg_state[CTX_PDP ## n ## _LDW+1] = lower_32_bits(_addr); \ | |
196 | } | |
197 | ||
84b790f8 BW |
198 | enum { |
199 | ADVANCED_CONTEXT = 0, | |
200 | LEGACY_CONTEXT, | |
201 | ADVANCED_AD_CONTEXT, | |
202 | LEGACY_64B_CONTEXT | |
203 | }; | |
204 | #define GEN8_CTX_MODE_SHIFT 3 | |
205 | enum { | |
206 | FAULT_AND_HANG = 0, | |
207 | FAULT_AND_HALT, /* Debug only */ | |
208 | FAULT_AND_STREAM, | |
209 | FAULT_AND_CONTINUE /* Unsupported */ | |
210 | }; | |
211 | #define GEN8_CTX_ID_SHIFT 32 | |
17ee950d | 212 | #define CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT 0x17 |
84b790f8 | 213 | |
7ba717cf TD |
214 | static int intel_lr_context_pin(struct intel_engine_cs *ring, |
215 | struct intel_context *ctx); | |
216 | ||
73e4d07f OM |
217 | /** |
218 | * intel_sanitize_enable_execlists() - sanitize i915.enable_execlists | |
219 | * @dev: DRM device. | |
220 | * @enable_execlists: value of i915.enable_execlists module parameter. | |
221 | * | |
222 | * Only certain platforms support Execlists (the prerequisites being | |
27401d12 | 223 | * support for Logical Ring Contexts and Aliasing PPGTT or better). |
73e4d07f OM |
224 | * |
225 | * Return: 1 if Execlists is supported and has to be enabled. | |
226 | */ | |
127f1003 OM |
227 | int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists) |
228 | { | |
bd84b1e9 DV |
229 | WARN_ON(i915.enable_ppgtt == -1); |
230 | ||
70ee45e1 DL |
231 | if (INTEL_INFO(dev)->gen >= 9) |
232 | return 1; | |
233 | ||
127f1003 OM |
234 | if (enable_execlists == 0) |
235 | return 0; | |
236 | ||
14bf993e OM |
237 | if (HAS_LOGICAL_RING_CONTEXTS(dev) && USES_PPGTT(dev) && |
238 | i915.use_mmio_flip >= 0) | |
127f1003 OM |
239 | return 1; |
240 | ||
241 | return 0; | |
242 | } | |
ede7d42b | 243 | |
73e4d07f OM |
244 | /** |
245 | * intel_execlists_ctx_id() - get the Execlists Context ID | |
246 | * @ctx_obj: Logical Ring Context backing object. | |
247 | * | |
248 | * Do not confuse with ctx->id! Unfortunately we have a name overload | |
249 | * here: the old context ID we pass to userspace as a handler so that | |
250 | * they can refer to a context, and the new context ID we pass to the | |
251 | * ELSP so that the GPU can inform us of the context status via | |
252 | * interrupts. | |
253 | * | |
254 | * Return: 20-bits globally unique context ID. | |
255 | */ | |
84b790f8 BW |
256 | u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj) |
257 | { | |
258 | u32 lrca = i915_gem_obj_ggtt_offset(ctx_obj); | |
259 | ||
260 | /* LRCA is required to be 4K aligned so the more significant 20 bits | |
261 | * are globally unique */ | |
262 | return lrca >> 12; | |
263 | } | |
264 | ||
203a571b NH |
265 | static uint64_t execlists_ctx_descriptor(struct intel_engine_cs *ring, |
266 | struct drm_i915_gem_object *ctx_obj) | |
84b790f8 | 267 | { |
203a571b | 268 | struct drm_device *dev = ring->dev; |
84b790f8 BW |
269 | uint64_t desc; |
270 | uint64_t lrca = i915_gem_obj_ggtt_offset(ctx_obj); | |
acdd884a MT |
271 | |
272 | WARN_ON(lrca & 0xFFFFFFFF00000FFFULL); | |
84b790f8 BW |
273 | |
274 | desc = GEN8_CTX_VALID; | |
275 | desc |= LEGACY_CONTEXT << GEN8_CTX_MODE_SHIFT; | |
51847fb9 AS |
276 | if (IS_GEN8(ctx_obj->base.dev)) |
277 | desc |= GEN8_CTX_L3LLC_COHERENT; | |
84b790f8 BW |
278 | desc |= GEN8_CTX_PRIVILEGE; |
279 | desc |= lrca; | |
280 | desc |= (u64)intel_execlists_ctx_id(ctx_obj) << GEN8_CTX_ID_SHIFT; | |
281 | ||
282 | /* TODO: WaDisableLiteRestore when we start using semaphore | |
283 | * signalling between Command Streamers */ | |
284 | /* desc |= GEN8_CTX_FORCE_RESTORE; */ | |
285 | ||
203a571b NH |
286 | /* WaEnableForceRestoreInCtxtDescForVCS:skl */ |
287 | if (IS_GEN9(dev) && | |
288 | INTEL_REVID(dev) <= SKL_REVID_B0 && | |
289 | (ring->id == BCS || ring->id == VCS || | |
290 | ring->id == VECS || ring->id == VCS2)) | |
291 | desc |= GEN8_CTX_FORCE_RESTORE; | |
292 | ||
84b790f8 BW |
293 | return desc; |
294 | } | |
295 | ||
296 | static void execlists_elsp_write(struct intel_engine_cs *ring, | |
297 | struct drm_i915_gem_object *ctx_obj0, | |
298 | struct drm_i915_gem_object *ctx_obj1) | |
299 | { | |
6e7cc470 TU |
300 | struct drm_device *dev = ring->dev; |
301 | struct drm_i915_private *dev_priv = dev->dev_private; | |
84b790f8 BW |
302 | uint64_t temp = 0; |
303 | uint32_t desc[4]; | |
304 | ||
305 | /* XXX: You must always write both descriptors in the order below. */ | |
306 | if (ctx_obj1) | |
203a571b | 307 | temp = execlists_ctx_descriptor(ring, ctx_obj1); |
84b790f8 BW |
308 | else |
309 | temp = 0; | |
310 | desc[1] = (u32)(temp >> 32); | |
311 | desc[0] = (u32)temp; | |
312 | ||
203a571b | 313 | temp = execlists_ctx_descriptor(ring, ctx_obj0); |
84b790f8 BW |
314 | desc[3] = (u32)(temp >> 32); |
315 | desc[2] = (u32)temp; | |
316 | ||
a6111f7b CW |
317 | spin_lock(&dev_priv->uncore.lock); |
318 | intel_uncore_forcewake_get__locked(dev_priv, FORCEWAKE_ALL); | |
319 | I915_WRITE_FW(RING_ELSP(ring), desc[1]); | |
320 | I915_WRITE_FW(RING_ELSP(ring), desc[0]); | |
321 | I915_WRITE_FW(RING_ELSP(ring), desc[3]); | |
6daccb0b | 322 | |
84b790f8 | 323 | /* The context is automatically loaded after the following */ |
a6111f7b | 324 | I915_WRITE_FW(RING_ELSP(ring), desc[2]); |
84b790f8 BW |
325 | |
326 | /* ELSP is a wo register, so use another nearby reg for posting instead */ | |
a6111f7b CW |
327 | POSTING_READ_FW(RING_EXECLIST_STATUS(ring)); |
328 | intel_uncore_forcewake_put__locked(dev_priv, FORCEWAKE_ALL); | |
329 | spin_unlock(&dev_priv->uncore.lock); | |
84b790f8 BW |
330 | } |
331 | ||
7ba717cf TD |
332 | static int execlists_update_context(struct drm_i915_gem_object *ctx_obj, |
333 | struct drm_i915_gem_object *ring_obj, | |
d7b2633d | 334 | struct i915_hw_ppgtt *ppgtt, |
7ba717cf | 335 | u32 tail) |
ae1250b9 OM |
336 | { |
337 | struct page *page; | |
338 | uint32_t *reg_state; | |
339 | ||
340 | page = i915_gem_object_get_page(ctx_obj, 1); | |
341 | reg_state = kmap_atomic(page); | |
342 | ||
343 | reg_state[CTX_RING_TAIL+1] = tail; | |
7ba717cf | 344 | reg_state[CTX_RING_BUFFER_START+1] = i915_gem_obj_ggtt_offset(ring_obj); |
ae1250b9 | 345 | |
d7b2633d MT |
346 | /* True PPGTT with dynamic page allocation: update PDP registers and |
347 | * point the unallocated PDPs to the scratch page | |
348 | */ | |
349 | if (ppgtt) { | |
350 | ASSIGN_CTX_PDP(ppgtt, reg_state, 3); | |
351 | ASSIGN_CTX_PDP(ppgtt, reg_state, 2); | |
352 | ASSIGN_CTX_PDP(ppgtt, reg_state, 1); | |
353 | ASSIGN_CTX_PDP(ppgtt, reg_state, 0); | |
354 | } | |
355 | ||
ae1250b9 OM |
356 | kunmap_atomic(reg_state); |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
cd0707cb DG |
361 | static void execlists_submit_contexts(struct intel_engine_cs *ring, |
362 | struct intel_context *to0, u32 tail0, | |
363 | struct intel_context *to1, u32 tail1) | |
84b790f8 | 364 | { |
7ba717cf TD |
365 | struct drm_i915_gem_object *ctx_obj0 = to0->engine[ring->id].state; |
366 | struct intel_ringbuffer *ringbuf0 = to0->engine[ring->id].ringbuf; | |
84b790f8 | 367 | struct drm_i915_gem_object *ctx_obj1 = NULL; |
7ba717cf | 368 | struct intel_ringbuffer *ringbuf1 = NULL; |
84b790f8 | 369 | |
84b790f8 | 370 | BUG_ON(!ctx_obj0); |
acdd884a | 371 | WARN_ON(!i915_gem_obj_is_pinned(ctx_obj0)); |
7ba717cf | 372 | WARN_ON(!i915_gem_obj_is_pinned(ringbuf0->obj)); |
84b790f8 | 373 | |
d7b2633d | 374 | execlists_update_context(ctx_obj0, ringbuf0->obj, to0->ppgtt, tail0); |
ae1250b9 | 375 | |
84b790f8 | 376 | if (to1) { |
7ba717cf | 377 | ringbuf1 = to1->engine[ring->id].ringbuf; |
84b790f8 BW |
378 | ctx_obj1 = to1->engine[ring->id].state; |
379 | BUG_ON(!ctx_obj1); | |
acdd884a | 380 | WARN_ON(!i915_gem_obj_is_pinned(ctx_obj1)); |
7ba717cf | 381 | WARN_ON(!i915_gem_obj_is_pinned(ringbuf1->obj)); |
ae1250b9 | 382 | |
d7b2633d | 383 | execlists_update_context(ctx_obj1, ringbuf1->obj, to1->ppgtt, tail1); |
84b790f8 BW |
384 | } |
385 | ||
386 | execlists_elsp_write(ring, ctx_obj0, ctx_obj1); | |
84b790f8 BW |
387 | } |
388 | ||
acdd884a MT |
389 | static void execlists_context_unqueue(struct intel_engine_cs *ring) |
390 | { | |
6d3d8274 NH |
391 | struct drm_i915_gem_request *req0 = NULL, *req1 = NULL; |
392 | struct drm_i915_gem_request *cursor = NULL, *tmp = NULL; | |
e981e7b1 TD |
393 | |
394 | assert_spin_locked(&ring->execlist_lock); | |
acdd884a | 395 | |
779949f4 PA |
396 | /* |
397 | * If irqs are not active generate a warning as batches that finish | |
398 | * without the irqs may get lost and a GPU Hang may occur. | |
399 | */ | |
400 | WARN_ON(!intel_irqs_enabled(ring->dev->dev_private)); | |
401 | ||
acdd884a MT |
402 | if (list_empty(&ring->execlist_queue)) |
403 | return; | |
404 | ||
405 | /* Try to read in pairs */ | |
406 | list_for_each_entry_safe(cursor, tmp, &ring->execlist_queue, | |
407 | execlist_link) { | |
408 | if (!req0) { | |
409 | req0 = cursor; | |
6d3d8274 | 410 | } else if (req0->ctx == cursor->ctx) { |
acdd884a MT |
411 | /* Same ctx: ignore first request, as second request |
412 | * will update tail past first request's workload */ | |
e1fee72c | 413 | cursor->elsp_submitted = req0->elsp_submitted; |
acdd884a | 414 | list_del(&req0->execlist_link); |
c86ee3a9 TD |
415 | list_add_tail(&req0->execlist_link, |
416 | &ring->execlist_retired_req_list); | |
acdd884a MT |
417 | req0 = cursor; |
418 | } else { | |
419 | req1 = cursor; | |
420 | break; | |
421 | } | |
422 | } | |
423 | ||
53292cdb MT |
424 | if (IS_GEN8(ring->dev) || IS_GEN9(ring->dev)) { |
425 | /* | |
426 | * WaIdleLiteRestore: make sure we never cause a lite | |
427 | * restore with HEAD==TAIL | |
428 | */ | |
d63f820f | 429 | if (req0->elsp_submitted) { |
53292cdb MT |
430 | /* |
431 | * Apply the wa NOOPS to prevent ring:HEAD == req:TAIL | |
432 | * as we resubmit the request. See gen8_emit_request() | |
433 | * for where we prepare the padding after the end of the | |
434 | * request. | |
435 | */ | |
436 | struct intel_ringbuffer *ringbuf; | |
437 | ||
438 | ringbuf = req0->ctx->engine[ring->id].ringbuf; | |
439 | req0->tail += 8; | |
440 | req0->tail &= ringbuf->size - 1; | |
441 | } | |
442 | } | |
443 | ||
e1fee72c OM |
444 | WARN_ON(req1 && req1->elsp_submitted); |
445 | ||
6d3d8274 NH |
446 | execlists_submit_contexts(ring, req0->ctx, req0->tail, |
447 | req1 ? req1->ctx : NULL, | |
448 | req1 ? req1->tail : 0); | |
e1fee72c OM |
449 | |
450 | req0->elsp_submitted++; | |
451 | if (req1) | |
452 | req1->elsp_submitted++; | |
acdd884a MT |
453 | } |
454 | ||
e981e7b1 TD |
455 | static bool execlists_check_remove_request(struct intel_engine_cs *ring, |
456 | u32 request_id) | |
457 | { | |
6d3d8274 | 458 | struct drm_i915_gem_request *head_req; |
e981e7b1 TD |
459 | |
460 | assert_spin_locked(&ring->execlist_lock); | |
461 | ||
462 | head_req = list_first_entry_or_null(&ring->execlist_queue, | |
6d3d8274 | 463 | struct drm_i915_gem_request, |
e981e7b1 TD |
464 | execlist_link); |
465 | ||
466 | if (head_req != NULL) { | |
467 | struct drm_i915_gem_object *ctx_obj = | |
6d3d8274 | 468 | head_req->ctx->engine[ring->id].state; |
e981e7b1 | 469 | if (intel_execlists_ctx_id(ctx_obj) == request_id) { |
e1fee72c OM |
470 | WARN(head_req->elsp_submitted == 0, |
471 | "Never submitted head request\n"); | |
472 | ||
473 | if (--head_req->elsp_submitted <= 0) { | |
474 | list_del(&head_req->execlist_link); | |
c86ee3a9 TD |
475 | list_add_tail(&head_req->execlist_link, |
476 | &ring->execlist_retired_req_list); | |
e1fee72c OM |
477 | return true; |
478 | } | |
e981e7b1 TD |
479 | } |
480 | } | |
481 | ||
482 | return false; | |
483 | } | |
484 | ||
73e4d07f | 485 | /** |
3f7531c3 | 486 | * intel_lrc_irq_handler() - handle Context Switch interrupts |
73e4d07f OM |
487 | * @ring: Engine Command Streamer to handle. |
488 | * | |
489 | * Check the unread Context Status Buffers and manage the submission of new | |
490 | * contexts to the ELSP accordingly. | |
491 | */ | |
3f7531c3 | 492 | void intel_lrc_irq_handler(struct intel_engine_cs *ring) |
e981e7b1 TD |
493 | { |
494 | struct drm_i915_private *dev_priv = ring->dev->dev_private; | |
495 | u32 status_pointer; | |
496 | u8 read_pointer; | |
497 | u8 write_pointer; | |
498 | u32 status; | |
499 | u32 status_id; | |
500 | u32 submit_contexts = 0; | |
501 | ||
502 | status_pointer = I915_READ(RING_CONTEXT_STATUS_PTR(ring)); | |
503 | ||
504 | read_pointer = ring->next_context_status_buffer; | |
505 | write_pointer = status_pointer & 0x07; | |
506 | if (read_pointer > write_pointer) | |
507 | write_pointer += 6; | |
508 | ||
509 | spin_lock(&ring->execlist_lock); | |
510 | ||
511 | while (read_pointer < write_pointer) { | |
512 | read_pointer++; | |
513 | status = I915_READ(RING_CONTEXT_STATUS_BUF(ring) + | |
514 | (read_pointer % 6) * 8); | |
515 | status_id = I915_READ(RING_CONTEXT_STATUS_BUF(ring) + | |
516 | (read_pointer % 6) * 8 + 4); | |
517 | ||
e1fee72c OM |
518 | if (status & GEN8_CTX_STATUS_PREEMPTED) { |
519 | if (status & GEN8_CTX_STATUS_LITE_RESTORE) { | |
520 | if (execlists_check_remove_request(ring, status_id)) | |
521 | WARN(1, "Lite Restored request removed from queue\n"); | |
522 | } else | |
523 | WARN(1, "Preemption without Lite Restore\n"); | |
524 | } | |
525 | ||
526 | if ((status & GEN8_CTX_STATUS_ACTIVE_IDLE) || | |
527 | (status & GEN8_CTX_STATUS_ELEMENT_SWITCH)) { | |
e981e7b1 TD |
528 | if (execlists_check_remove_request(ring, status_id)) |
529 | submit_contexts++; | |
530 | } | |
531 | } | |
532 | ||
533 | if (submit_contexts != 0) | |
534 | execlists_context_unqueue(ring); | |
535 | ||
536 | spin_unlock(&ring->execlist_lock); | |
537 | ||
538 | WARN(submit_contexts > 2, "More than two context complete events?\n"); | |
539 | ring->next_context_status_buffer = write_pointer % 6; | |
540 | ||
541 | I915_WRITE(RING_CONTEXT_STATUS_PTR(ring), | |
542 | ((u32)ring->next_context_status_buffer & 0x07) << 8); | |
543 | } | |
544 | ||
ae70797d | 545 | static int execlists_context_queue(struct drm_i915_gem_request *request) |
acdd884a | 546 | { |
ae70797d | 547 | struct intel_engine_cs *ring = request->ring; |
6d3d8274 | 548 | struct drm_i915_gem_request *cursor; |
f1ad5a1f | 549 | int num_elements = 0; |
acdd884a | 550 | |
ae70797d JH |
551 | if (request->ctx != ring->default_context) |
552 | intel_lr_context_pin(ring, request->ctx); | |
9bb1af44 JH |
553 | |
554 | i915_gem_request_reference(request); | |
555 | ||
ae70797d | 556 | request->tail = request->ringbuf->tail; |
2d12955a | 557 | |
b5eba372 | 558 | spin_lock_irq(&ring->execlist_lock); |
acdd884a | 559 | |
f1ad5a1f OM |
560 | list_for_each_entry(cursor, &ring->execlist_queue, execlist_link) |
561 | if (++num_elements > 2) | |
562 | break; | |
563 | ||
564 | if (num_elements > 2) { | |
6d3d8274 | 565 | struct drm_i915_gem_request *tail_req; |
f1ad5a1f OM |
566 | |
567 | tail_req = list_last_entry(&ring->execlist_queue, | |
6d3d8274 | 568 | struct drm_i915_gem_request, |
f1ad5a1f OM |
569 | execlist_link); |
570 | ||
ae70797d | 571 | if (request->ctx == tail_req->ctx) { |
f1ad5a1f | 572 | WARN(tail_req->elsp_submitted != 0, |
7ba717cf | 573 | "More than 2 already-submitted reqs queued\n"); |
f1ad5a1f | 574 | list_del(&tail_req->execlist_link); |
c86ee3a9 TD |
575 | list_add_tail(&tail_req->execlist_link, |
576 | &ring->execlist_retired_req_list); | |
f1ad5a1f OM |
577 | } |
578 | } | |
579 | ||
6d3d8274 | 580 | list_add_tail(&request->execlist_link, &ring->execlist_queue); |
f1ad5a1f | 581 | if (num_elements == 0) |
acdd884a MT |
582 | execlists_context_unqueue(ring); |
583 | ||
b5eba372 | 584 | spin_unlock_irq(&ring->execlist_lock); |
acdd884a MT |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
2f20055d | 589 | static int logical_ring_invalidate_all_caches(struct drm_i915_gem_request *req) |
ba8b7ccb | 590 | { |
2f20055d | 591 | struct intel_engine_cs *ring = req->ring; |
ba8b7ccb OM |
592 | uint32_t flush_domains; |
593 | int ret; | |
594 | ||
595 | flush_domains = 0; | |
596 | if (ring->gpu_caches_dirty) | |
597 | flush_domains = I915_GEM_GPU_DOMAINS; | |
598 | ||
7deb4d39 | 599 | ret = ring->emit_flush(req, I915_GEM_GPU_DOMAINS, flush_domains); |
ba8b7ccb OM |
600 | if (ret) |
601 | return ret; | |
602 | ||
603 | ring->gpu_caches_dirty = false; | |
604 | return 0; | |
605 | } | |
606 | ||
535fbe82 | 607 | static int execlists_move_to_gpu(struct drm_i915_gem_request *req, |
ba8b7ccb OM |
608 | struct list_head *vmas) |
609 | { | |
535fbe82 | 610 | const unsigned other_rings = ~intel_ring_flag(req->ring); |
ba8b7ccb OM |
611 | struct i915_vma *vma; |
612 | uint32_t flush_domains = 0; | |
613 | bool flush_chipset = false; | |
614 | int ret; | |
615 | ||
616 | list_for_each_entry(vma, vmas, exec_list) { | |
617 | struct drm_i915_gem_object *obj = vma->obj; | |
618 | ||
03ade511 | 619 | if (obj->active & other_rings) { |
91af127f | 620 | ret = i915_gem_object_sync(obj, req->ring, &req); |
03ade511 CW |
621 | if (ret) |
622 | return ret; | |
623 | } | |
ba8b7ccb OM |
624 | |
625 | if (obj->base.write_domain & I915_GEM_DOMAIN_CPU) | |
626 | flush_chipset |= i915_gem_clflush_object(obj, false); | |
627 | ||
628 | flush_domains |= obj->base.write_domain; | |
629 | } | |
630 | ||
631 | if (flush_domains & I915_GEM_DOMAIN_GTT) | |
632 | wmb(); | |
633 | ||
634 | /* Unconditionally invalidate gpu caches and ensure that we do flush | |
635 | * any residual writes from the previous batch. | |
636 | */ | |
2f20055d | 637 | return logical_ring_invalidate_all_caches(req); |
ba8b7ccb OM |
638 | } |
639 | ||
40e895ce | 640 | int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request) |
bc0dce3f | 641 | { |
bc0dce3f JH |
642 | int ret; |
643 | ||
40e895ce JH |
644 | if (request->ctx != request->ring->default_context) { |
645 | ret = intel_lr_context_pin(request->ring, request->ctx); | |
6689cb2b | 646 | if (ret) |
bc0dce3f | 647 | return ret; |
bc0dce3f JH |
648 | } |
649 | ||
40e895ce | 650 | request->ringbuf = request->ctx->engine[request->ring->id].ringbuf; |
bc0dce3f | 651 | |
bc0dce3f JH |
652 | return 0; |
653 | } | |
654 | ||
ae70797d | 655 | static int logical_ring_wait_for_space(struct drm_i915_gem_request *req, |
595e1eeb | 656 | int bytes) |
bc0dce3f | 657 | { |
ae70797d JH |
658 | struct intel_ringbuffer *ringbuf = req->ringbuf; |
659 | struct intel_engine_cs *ring = req->ring; | |
660 | struct drm_i915_gem_request *target; | |
b4716185 CW |
661 | unsigned space; |
662 | int ret; | |
bc0dce3f JH |
663 | |
664 | if (intel_ring_space(ringbuf) >= bytes) | |
665 | return 0; | |
666 | ||
79bbcc29 JH |
667 | /* The whole point of reserving space is to not wait! */ |
668 | WARN_ON(ringbuf->reserved_in_use); | |
669 | ||
ae70797d | 670 | list_for_each_entry(target, &ring->request_list, list) { |
bc0dce3f JH |
671 | /* |
672 | * The request queue is per-engine, so can contain requests | |
673 | * from multiple ringbuffers. Here, we must ignore any that | |
674 | * aren't from the ringbuffer we're considering. | |
675 | */ | |
ae70797d | 676 | if (target->ringbuf != ringbuf) |
bc0dce3f JH |
677 | continue; |
678 | ||
679 | /* Would completion of this request free enough space? */ | |
ae70797d | 680 | space = __intel_ring_space(target->postfix, ringbuf->tail, |
b4716185 CW |
681 | ringbuf->size); |
682 | if (space >= bytes) | |
bc0dce3f | 683 | break; |
bc0dce3f JH |
684 | } |
685 | ||
ae70797d | 686 | if (WARN_ON(&target->list == &ring->request_list)) |
bc0dce3f JH |
687 | return -ENOSPC; |
688 | ||
ae70797d | 689 | ret = i915_wait_request(target); |
bc0dce3f JH |
690 | if (ret) |
691 | return ret; | |
692 | ||
b4716185 CW |
693 | ringbuf->space = space; |
694 | return 0; | |
bc0dce3f JH |
695 | } |
696 | ||
697 | /* | |
698 | * intel_logical_ring_advance_and_submit() - advance the tail and submit the workload | |
ae70797d | 699 | * @request: Request to advance the logical ringbuffer of. |
bc0dce3f JH |
700 | * |
701 | * The tail is updated in our logical ringbuffer struct, not in the actual context. What | |
702 | * really happens during submission is that the context and current tail will be placed | |
703 | * on a queue waiting for the ELSP to be ready to accept a new context submission. At that | |
704 | * point, the tail *inside* the context is updated and the ELSP written to. | |
705 | */ | |
706 | static void | |
ae70797d | 707 | intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request) |
bc0dce3f | 708 | { |
ae70797d | 709 | struct intel_engine_cs *ring = request->ring; |
bc0dce3f | 710 | |
ae70797d | 711 | intel_logical_ring_advance(request->ringbuf); |
bc0dce3f JH |
712 | |
713 | if (intel_ring_stopped(ring)) | |
714 | return; | |
715 | ||
ae70797d | 716 | execlists_context_queue(request); |
bc0dce3f JH |
717 | } |
718 | ||
79bbcc29 | 719 | static void __wrap_ring_buffer(struct intel_ringbuffer *ringbuf) |
bc0dce3f JH |
720 | { |
721 | uint32_t __iomem *virt; | |
722 | int rem = ringbuf->size - ringbuf->tail; | |
723 | ||
bc0dce3f JH |
724 | virt = ringbuf->virtual_start + ringbuf->tail; |
725 | rem /= 4; | |
726 | while (rem--) | |
727 | iowrite32(MI_NOOP, virt++); | |
728 | ||
729 | ringbuf->tail = 0; | |
730 | intel_ring_update_space(ringbuf); | |
bc0dce3f JH |
731 | } |
732 | ||
ae70797d | 733 | static int logical_ring_prepare(struct drm_i915_gem_request *req, int bytes) |
bc0dce3f | 734 | { |
ae70797d | 735 | struct intel_ringbuffer *ringbuf = req->ringbuf; |
79bbcc29 JH |
736 | int remain_usable = ringbuf->effective_size - ringbuf->tail; |
737 | int remain_actual = ringbuf->size - ringbuf->tail; | |
738 | int ret, total_bytes, wait_bytes = 0; | |
739 | bool need_wrap = false; | |
29b1b415 | 740 | |
79bbcc29 JH |
741 | if (ringbuf->reserved_in_use) |
742 | total_bytes = bytes; | |
743 | else | |
744 | total_bytes = bytes + ringbuf->reserved_size; | |
29b1b415 | 745 | |
79bbcc29 JH |
746 | if (unlikely(bytes > remain_usable)) { |
747 | /* | |
748 | * Not enough space for the basic request. So need to flush | |
749 | * out the remainder and then wait for base + reserved. | |
750 | */ | |
751 | wait_bytes = remain_actual + total_bytes; | |
752 | need_wrap = true; | |
753 | } else { | |
754 | if (unlikely(total_bytes > remain_usable)) { | |
755 | /* | |
756 | * The base request will fit but the reserved space | |
757 | * falls off the end. So only need to to wait for the | |
758 | * reserved size after flushing out the remainder. | |
759 | */ | |
760 | wait_bytes = remain_actual + ringbuf->reserved_size; | |
761 | need_wrap = true; | |
762 | } else if (total_bytes > ringbuf->space) { | |
763 | /* No wrapping required, just waiting. */ | |
764 | wait_bytes = total_bytes; | |
29b1b415 | 765 | } |
bc0dce3f JH |
766 | } |
767 | ||
79bbcc29 JH |
768 | if (wait_bytes) { |
769 | ret = logical_ring_wait_for_space(req, wait_bytes); | |
bc0dce3f JH |
770 | if (unlikely(ret)) |
771 | return ret; | |
79bbcc29 JH |
772 | |
773 | if (need_wrap) | |
774 | __wrap_ring_buffer(ringbuf); | |
bc0dce3f JH |
775 | } |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | /** | |
781 | * intel_logical_ring_begin() - prepare the logical ringbuffer to accept some commands | |
782 | * | |
4d616a29 | 783 | * @request: The request to start some new work for |
4d78c8dc | 784 | * @ctx: Logical ring context whose ringbuffer is being prepared. |
bc0dce3f JH |
785 | * @num_dwords: number of DWORDs that we plan to write to the ringbuffer. |
786 | * | |
787 | * The ringbuffer might not be ready to accept the commands right away (maybe it needs to | |
788 | * be wrapped, or wait a bit for the tail to be updated). This function takes care of that | |
789 | * and also preallocates a request (every workload submission is still mediated through | |
790 | * requests, same as it did with legacy ringbuffer submission). | |
791 | * | |
792 | * Return: non-zero if the ringbuffer is not ready to be written to. | |
793 | */ | |
4d616a29 JH |
794 | static int intel_logical_ring_begin(struct drm_i915_gem_request *req, |
795 | int num_dwords) | |
bc0dce3f | 796 | { |
4d616a29 | 797 | struct drm_i915_private *dev_priv; |
bc0dce3f JH |
798 | int ret; |
799 | ||
4d616a29 JH |
800 | WARN_ON(req == NULL); |
801 | dev_priv = req->ring->dev->dev_private; | |
802 | ||
bc0dce3f JH |
803 | ret = i915_gem_check_wedge(&dev_priv->gpu_error, |
804 | dev_priv->mm.interruptible); | |
805 | if (ret) | |
806 | return ret; | |
807 | ||
ae70797d | 808 | ret = logical_ring_prepare(req, num_dwords * sizeof(uint32_t)); |
bc0dce3f JH |
809 | if (ret) |
810 | return ret; | |
811 | ||
4d616a29 | 812 | req->ringbuf->space -= num_dwords * sizeof(uint32_t); |
bc0dce3f JH |
813 | return 0; |
814 | } | |
815 | ||
ccd98fe4 JH |
816 | int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request) |
817 | { | |
818 | /* | |
819 | * The first call merely notes the reserve request and is common for | |
820 | * all back ends. The subsequent localised _begin() call actually | |
821 | * ensures that the reservation is available. Without the begin, if | |
822 | * the request creator immediately submitted the request without | |
823 | * adding any commands to it then there might not actually be | |
824 | * sufficient room for the submission commands. | |
825 | */ | |
826 | intel_ring_reserved_space_reserve(request->ringbuf, MIN_SPACE_FOR_ADD_REQUEST); | |
827 | ||
828 | return intel_logical_ring_begin(request, 0); | |
829 | } | |
830 | ||
73e4d07f OM |
831 | /** |
832 | * execlists_submission() - submit a batchbuffer for execution, Execlists style | |
833 | * @dev: DRM device. | |
834 | * @file: DRM file. | |
835 | * @ring: Engine Command Streamer to submit to. | |
836 | * @ctx: Context to employ for this submission. | |
837 | * @args: execbuffer call arguments. | |
838 | * @vmas: list of vmas. | |
839 | * @batch_obj: the batchbuffer to submit. | |
840 | * @exec_start: batchbuffer start virtual address pointer. | |
8e004efc | 841 | * @dispatch_flags: translated execbuffer call flags. |
73e4d07f OM |
842 | * |
843 | * This is the evil twin version of i915_gem_ringbuffer_submission. It abstracts | |
844 | * away the submission details of the execbuffer ioctl call. | |
845 | * | |
846 | * Return: non-zero if the submission fails. | |
847 | */ | |
5f19e2bf | 848 | int intel_execlists_submission(struct i915_execbuffer_params *params, |
454afebd | 849 | struct drm_i915_gem_execbuffer2 *args, |
5f19e2bf | 850 | struct list_head *vmas) |
454afebd | 851 | { |
5f19e2bf JH |
852 | struct drm_device *dev = params->dev; |
853 | struct intel_engine_cs *ring = params->ring; | |
ba8b7ccb | 854 | struct drm_i915_private *dev_priv = dev->dev_private; |
5f19e2bf JH |
855 | struct intel_ringbuffer *ringbuf = params->ctx->engine[ring->id].ringbuf; |
856 | u64 exec_start; | |
ba8b7ccb OM |
857 | int instp_mode; |
858 | u32 instp_mask; | |
859 | int ret; | |
860 | ||
861 | instp_mode = args->flags & I915_EXEC_CONSTANTS_MASK; | |
862 | instp_mask = I915_EXEC_CONSTANTS_MASK; | |
863 | switch (instp_mode) { | |
864 | case I915_EXEC_CONSTANTS_REL_GENERAL: | |
865 | case I915_EXEC_CONSTANTS_ABSOLUTE: | |
866 | case I915_EXEC_CONSTANTS_REL_SURFACE: | |
867 | if (instp_mode != 0 && ring != &dev_priv->ring[RCS]) { | |
868 | DRM_DEBUG("non-0 rel constants mode on non-RCS\n"); | |
869 | return -EINVAL; | |
870 | } | |
871 | ||
872 | if (instp_mode != dev_priv->relative_constants_mode) { | |
873 | if (instp_mode == I915_EXEC_CONSTANTS_REL_SURFACE) { | |
874 | DRM_DEBUG("rel surface constants mode invalid on gen5+\n"); | |
875 | return -EINVAL; | |
876 | } | |
877 | ||
878 | /* The HW changed the meaning on this bit on gen6 */ | |
879 | instp_mask &= ~I915_EXEC_CONSTANTS_REL_SURFACE; | |
880 | } | |
881 | break; | |
882 | default: | |
883 | DRM_DEBUG("execbuf with unknown constants: %d\n", instp_mode); | |
884 | return -EINVAL; | |
885 | } | |
886 | ||
887 | if (args->num_cliprects != 0) { | |
888 | DRM_DEBUG("clip rectangles are only valid on pre-gen5\n"); | |
889 | return -EINVAL; | |
890 | } else { | |
891 | if (args->DR4 == 0xffffffff) { | |
892 | DRM_DEBUG("UXA submitting garbage DR4, fixing up\n"); | |
893 | args->DR4 = 0; | |
894 | } | |
895 | ||
896 | if (args->DR1 || args->DR4 || args->cliprects_ptr) { | |
897 | DRM_DEBUG("0 cliprects but dirt in cliprects fields\n"); | |
898 | return -EINVAL; | |
899 | } | |
900 | } | |
901 | ||
902 | if (args->flags & I915_EXEC_GEN7_SOL_RESET) { | |
903 | DRM_DEBUG("sol reset is gen7 only\n"); | |
904 | return -EINVAL; | |
905 | } | |
906 | ||
535fbe82 | 907 | ret = execlists_move_to_gpu(params->request, vmas); |
ba8b7ccb OM |
908 | if (ret) |
909 | return ret; | |
910 | ||
911 | if (ring == &dev_priv->ring[RCS] && | |
912 | instp_mode != dev_priv->relative_constants_mode) { | |
4d616a29 | 913 | ret = intel_logical_ring_begin(params->request, 4); |
ba8b7ccb OM |
914 | if (ret) |
915 | return ret; | |
916 | ||
917 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
918 | intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(1)); | |
919 | intel_logical_ring_emit(ringbuf, INSTPM); | |
920 | intel_logical_ring_emit(ringbuf, instp_mask << 16 | instp_mode); | |
921 | intel_logical_ring_advance(ringbuf); | |
922 | ||
923 | dev_priv->relative_constants_mode = instp_mode; | |
924 | } | |
925 | ||
5f19e2bf JH |
926 | exec_start = params->batch_obj_vm_offset + |
927 | args->batch_start_offset; | |
928 | ||
be795fc1 | 929 | ret = ring->emit_bb_start(params->request, exec_start, params->dispatch_flags); |
ba8b7ccb OM |
930 | if (ret) |
931 | return ret; | |
932 | ||
95c24161 | 933 | trace_i915_gem_ring_dispatch(params->request, params->dispatch_flags); |
5e4be7bd | 934 | |
8a8edb59 | 935 | i915_gem_execbuffer_move_to_active(vmas, params->request); |
adeca76d | 936 | i915_gem_execbuffer_retire_commands(params); |
ba8b7ccb | 937 | |
454afebd OM |
938 | return 0; |
939 | } | |
940 | ||
c86ee3a9 TD |
941 | void intel_execlists_retire_requests(struct intel_engine_cs *ring) |
942 | { | |
6d3d8274 | 943 | struct drm_i915_gem_request *req, *tmp; |
c86ee3a9 TD |
944 | struct list_head retired_list; |
945 | ||
946 | WARN_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
947 | if (list_empty(&ring->execlist_retired_req_list)) | |
948 | return; | |
949 | ||
950 | INIT_LIST_HEAD(&retired_list); | |
b5eba372 | 951 | spin_lock_irq(&ring->execlist_lock); |
c86ee3a9 | 952 | list_replace_init(&ring->execlist_retired_req_list, &retired_list); |
b5eba372 | 953 | spin_unlock_irq(&ring->execlist_lock); |
c86ee3a9 TD |
954 | |
955 | list_for_each_entry_safe(req, tmp, &retired_list, execlist_link) { | |
6d3d8274 | 956 | struct intel_context *ctx = req->ctx; |
7ba717cf TD |
957 | struct drm_i915_gem_object *ctx_obj = |
958 | ctx->engine[ring->id].state; | |
959 | ||
960 | if (ctx_obj && (ctx != ring->default_context)) | |
961 | intel_lr_context_unpin(ring, ctx); | |
c86ee3a9 | 962 | list_del(&req->execlist_link); |
f8210795 | 963 | i915_gem_request_unreference(req); |
c86ee3a9 TD |
964 | } |
965 | } | |
966 | ||
454afebd OM |
967 | void intel_logical_ring_stop(struct intel_engine_cs *ring) |
968 | { | |
9832b9da OM |
969 | struct drm_i915_private *dev_priv = ring->dev->dev_private; |
970 | int ret; | |
971 | ||
972 | if (!intel_ring_initialized(ring)) | |
973 | return; | |
974 | ||
975 | ret = intel_ring_idle(ring); | |
976 | if (ret && !i915_reset_in_progress(&to_i915(ring->dev)->gpu_error)) | |
977 | DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n", | |
978 | ring->name, ret); | |
979 | ||
980 | /* TODO: Is this correct with Execlists enabled? */ | |
981 | I915_WRITE_MODE(ring, _MASKED_BIT_ENABLE(STOP_RING)); | |
982 | if (wait_for_atomic((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000)) { | |
983 | DRM_ERROR("%s :timed out trying to stop ring\n", ring->name); | |
984 | return; | |
985 | } | |
986 | I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING)); | |
454afebd OM |
987 | } |
988 | ||
4866d729 | 989 | int logical_ring_flush_all_caches(struct drm_i915_gem_request *req) |
48e29f55 | 990 | { |
4866d729 | 991 | struct intel_engine_cs *ring = req->ring; |
48e29f55 OM |
992 | int ret; |
993 | ||
994 | if (!ring->gpu_caches_dirty) | |
995 | return 0; | |
996 | ||
7deb4d39 | 997 | ret = ring->emit_flush(req, 0, I915_GEM_GPU_DOMAINS); |
48e29f55 OM |
998 | if (ret) |
999 | return ret; | |
1000 | ||
1001 | ring->gpu_caches_dirty = false; | |
1002 | return 0; | |
1003 | } | |
1004 | ||
dcb4c12a OM |
1005 | static int intel_lr_context_pin(struct intel_engine_cs *ring, |
1006 | struct intel_context *ctx) | |
1007 | { | |
1008 | struct drm_i915_gem_object *ctx_obj = ctx->engine[ring->id].state; | |
7ba717cf | 1009 | struct intel_ringbuffer *ringbuf = ctx->engine[ring->id].ringbuf; |
dcb4c12a OM |
1010 | int ret = 0; |
1011 | ||
1012 | WARN_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
a7cbedec | 1013 | if (ctx->engine[ring->id].pin_count++ == 0) { |
dcb4c12a OM |
1014 | ret = i915_gem_obj_ggtt_pin(ctx_obj, |
1015 | GEN8_LR_CONTEXT_ALIGN, 0); | |
1016 | if (ret) | |
a7cbedec | 1017 | goto reset_pin_count; |
7ba717cf TD |
1018 | |
1019 | ret = intel_pin_and_map_ringbuffer_obj(ring->dev, ringbuf); | |
1020 | if (ret) | |
1021 | goto unpin_ctx_obj; | |
dcb4c12a OM |
1022 | } |
1023 | ||
7ba717cf TD |
1024 | return ret; |
1025 | ||
1026 | unpin_ctx_obj: | |
1027 | i915_gem_object_ggtt_unpin(ctx_obj); | |
a7cbedec MK |
1028 | reset_pin_count: |
1029 | ctx->engine[ring->id].pin_count = 0; | |
7ba717cf | 1030 | |
dcb4c12a OM |
1031 | return ret; |
1032 | } | |
1033 | ||
1034 | void intel_lr_context_unpin(struct intel_engine_cs *ring, | |
1035 | struct intel_context *ctx) | |
1036 | { | |
1037 | struct drm_i915_gem_object *ctx_obj = ctx->engine[ring->id].state; | |
7ba717cf | 1038 | struct intel_ringbuffer *ringbuf = ctx->engine[ring->id].ringbuf; |
dcb4c12a OM |
1039 | |
1040 | if (ctx_obj) { | |
1041 | WARN_ON(!mutex_is_locked(&ring->dev->struct_mutex)); | |
a7cbedec | 1042 | if (--ctx->engine[ring->id].pin_count == 0) { |
7ba717cf | 1043 | intel_unpin_ringbuffer_obj(ringbuf); |
dcb4c12a | 1044 | i915_gem_object_ggtt_unpin(ctx_obj); |
7ba717cf | 1045 | } |
dcb4c12a OM |
1046 | } |
1047 | } | |
1048 | ||
e2be4faf | 1049 | static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req) |
771b9a53 MT |
1050 | { |
1051 | int ret, i; | |
e2be4faf JH |
1052 | struct intel_engine_cs *ring = req->ring; |
1053 | struct intel_ringbuffer *ringbuf = req->ringbuf; | |
771b9a53 MT |
1054 | struct drm_device *dev = ring->dev; |
1055 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1056 | struct i915_workarounds *w = &dev_priv->workarounds; | |
1057 | ||
e6c1abb7 | 1058 | if (WARN_ON_ONCE(w->count == 0)) |
771b9a53 MT |
1059 | return 0; |
1060 | ||
1061 | ring->gpu_caches_dirty = true; | |
4866d729 | 1062 | ret = logical_ring_flush_all_caches(req); |
771b9a53 MT |
1063 | if (ret) |
1064 | return ret; | |
1065 | ||
4d616a29 | 1066 | ret = intel_logical_ring_begin(req, w->count * 2 + 2); |
771b9a53 MT |
1067 | if (ret) |
1068 | return ret; | |
1069 | ||
1070 | intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(w->count)); | |
1071 | for (i = 0; i < w->count; i++) { | |
1072 | intel_logical_ring_emit(ringbuf, w->reg[i].addr); | |
1073 | intel_logical_ring_emit(ringbuf, w->reg[i].value); | |
1074 | } | |
1075 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
1076 | ||
1077 | intel_logical_ring_advance(ringbuf); | |
1078 | ||
1079 | ring->gpu_caches_dirty = true; | |
4866d729 | 1080 | ret = logical_ring_flush_all_caches(req); |
771b9a53 MT |
1081 | if (ret) |
1082 | return ret; | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
17ee950d AS |
1087 | #define wa_ctx_emit(batch, cmd) \ |
1088 | do { \ | |
1089 | if (WARN_ON(index >= (PAGE_SIZE / sizeof(uint32_t)))) { \ | |
1090 | return -ENOSPC; \ | |
1091 | } \ | |
1092 | batch[index++] = (cmd); \ | |
1093 | } while (0) | |
1094 | ||
1095 | static inline uint32_t wa_ctx_start(struct i915_wa_ctx_bb *wa_ctx, | |
1096 | uint32_t offset, | |
1097 | uint32_t start_alignment) | |
1098 | { | |
1099 | return wa_ctx->offset = ALIGN(offset, start_alignment); | |
1100 | } | |
1101 | ||
1102 | static inline int wa_ctx_end(struct i915_wa_ctx_bb *wa_ctx, | |
1103 | uint32_t offset, | |
1104 | uint32_t size_alignment) | |
1105 | { | |
1106 | wa_ctx->size = offset - wa_ctx->offset; | |
1107 | ||
1108 | WARN(wa_ctx->size % size_alignment, | |
1109 | "wa_ctx_bb failed sanity checks: size %d is not aligned to %d\n", | |
1110 | wa_ctx->size, size_alignment); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | /** | |
1115 | * gen8_init_indirectctx_bb() - initialize indirect ctx batch with WA | |
1116 | * | |
1117 | * @ring: only applicable for RCS | |
1118 | * @wa_ctx: structure representing wa_ctx | |
1119 | * offset: specifies start of the batch, should be cache-aligned. This is updated | |
1120 | * with the offset value received as input. | |
1121 | * size: size of the batch in DWORDS but HW expects in terms of cachelines | |
1122 | * @batch: page in which WA are loaded | |
1123 | * @offset: This field specifies the start of the batch, it should be | |
1124 | * cache-aligned otherwise it is adjusted accordingly. | |
1125 | * Typically we only have one indirect_ctx and per_ctx batch buffer which are | |
1126 | * initialized at the beginning and shared across all contexts but this field | |
1127 | * helps us to have multiple batches at different offsets and select them based | |
1128 | * on a criteria. At the moment this batch always start at the beginning of the page | |
1129 | * and at this point we don't have multiple wa_ctx batch buffers. | |
1130 | * | |
1131 | * The number of WA applied are not known at the beginning; we use this field | |
1132 | * to return the no of DWORDS written. | |
4d78c8dc | 1133 | * |
17ee950d AS |
1134 | * It is to be noted that this batch does not contain MI_BATCH_BUFFER_END |
1135 | * so it adds NOOPs as padding to make it cacheline aligned. | |
1136 | * MI_BATCH_BUFFER_END will be added to perctx batch and both of them together | |
1137 | * makes a complete batch buffer. | |
1138 | * | |
1139 | * Return: non-zero if we exceed the PAGE_SIZE limit. | |
1140 | */ | |
1141 | ||
1142 | static int gen8_init_indirectctx_bb(struct intel_engine_cs *ring, | |
1143 | struct i915_wa_ctx_bb *wa_ctx, | |
1144 | uint32_t *const batch, | |
1145 | uint32_t *offset) | |
1146 | { | |
0160f055 | 1147 | uint32_t scratch_addr; |
17ee950d AS |
1148 | uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS); |
1149 | ||
7ad00d1a AS |
1150 | /* WaDisableCtxRestoreArbitration:bdw,chv */ |
1151 | wa_ctx_emit(batch, MI_ARB_ON_OFF | MI_ARB_DISABLE); | |
17ee950d | 1152 | |
c82435bb AS |
1153 | /* WaFlushCoherentL3CacheLinesAtContextSwitch:bdw */ |
1154 | if (IS_BROADWELL(ring->dev)) { | |
1155 | struct drm_i915_private *dev_priv = to_i915(ring->dev); | |
1156 | uint32_t l3sqc4_flush = (I915_READ(GEN8_L3SQCREG4) | | |
1157 | GEN8_LQSC_FLUSH_COHERENT_LINES); | |
1158 | ||
1159 | wa_ctx_emit(batch, MI_LOAD_REGISTER_IMM(1)); | |
1160 | wa_ctx_emit(batch, GEN8_L3SQCREG4); | |
1161 | wa_ctx_emit(batch, l3sqc4_flush); | |
1162 | ||
1163 | wa_ctx_emit(batch, GFX_OP_PIPE_CONTROL(6)); | |
1164 | wa_ctx_emit(batch, (PIPE_CONTROL_CS_STALL | | |
1165 | PIPE_CONTROL_DC_FLUSH_ENABLE)); | |
1166 | wa_ctx_emit(batch, 0); | |
1167 | wa_ctx_emit(batch, 0); | |
1168 | wa_ctx_emit(batch, 0); | |
1169 | wa_ctx_emit(batch, 0); | |
1170 | ||
1171 | wa_ctx_emit(batch, MI_LOAD_REGISTER_IMM(1)); | |
1172 | wa_ctx_emit(batch, GEN8_L3SQCREG4); | |
1173 | wa_ctx_emit(batch, l3sqc4_flush & ~GEN8_LQSC_FLUSH_COHERENT_LINES); | |
1174 | } | |
1175 | ||
0160f055 AS |
1176 | /* WaClearSlmSpaceAtContextSwitch:bdw,chv */ |
1177 | /* Actual scratch location is at 128 bytes offset */ | |
1178 | scratch_addr = ring->scratch.gtt_offset + 2*CACHELINE_BYTES; | |
1179 | ||
1180 | wa_ctx_emit(batch, GFX_OP_PIPE_CONTROL(6)); | |
1181 | wa_ctx_emit(batch, (PIPE_CONTROL_FLUSH_L3 | | |
1182 | PIPE_CONTROL_GLOBAL_GTT_IVB | | |
1183 | PIPE_CONTROL_CS_STALL | | |
1184 | PIPE_CONTROL_QW_WRITE)); | |
1185 | wa_ctx_emit(batch, scratch_addr); | |
1186 | wa_ctx_emit(batch, 0); | |
1187 | wa_ctx_emit(batch, 0); | |
1188 | wa_ctx_emit(batch, 0); | |
1189 | ||
17ee950d AS |
1190 | /* Pad to end of cacheline */ |
1191 | while (index % CACHELINE_DWORDS) | |
1192 | wa_ctx_emit(batch, MI_NOOP); | |
1193 | ||
1194 | /* | |
1195 | * MI_BATCH_BUFFER_END is not required in Indirect ctx BB because | |
1196 | * execution depends on the length specified in terms of cache lines | |
1197 | * in the register CTX_RCS_INDIRECT_CTX | |
1198 | */ | |
1199 | ||
1200 | return wa_ctx_end(wa_ctx, *offset = index, CACHELINE_DWORDS); | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * gen8_init_perctx_bb() - initialize per ctx batch with WA | |
1205 | * | |
1206 | * @ring: only applicable for RCS | |
1207 | * @wa_ctx: structure representing wa_ctx | |
1208 | * offset: specifies start of the batch, should be cache-aligned. | |
1209 | * size: size of the batch in DWORDS but HW expects in terms of cachelines | |
4d78c8dc | 1210 | * @batch: page in which WA are loaded |
17ee950d AS |
1211 | * @offset: This field specifies the start of this batch. |
1212 | * This batch is started immediately after indirect_ctx batch. Since we ensure | |
1213 | * that indirect_ctx ends on a cacheline this batch is aligned automatically. | |
1214 | * | |
1215 | * The number of DWORDS written are returned using this field. | |
1216 | * | |
1217 | * This batch is terminated with MI_BATCH_BUFFER_END and so we need not add padding | |
1218 | * to align it with cacheline as padding after MI_BATCH_BUFFER_END is redundant. | |
1219 | */ | |
1220 | static int gen8_init_perctx_bb(struct intel_engine_cs *ring, | |
1221 | struct i915_wa_ctx_bb *wa_ctx, | |
1222 | uint32_t *const batch, | |
1223 | uint32_t *offset) | |
1224 | { | |
1225 | uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS); | |
1226 | ||
7ad00d1a AS |
1227 | /* WaDisableCtxRestoreArbitration:bdw,chv */ |
1228 | wa_ctx_emit(batch, MI_ARB_ON_OFF | MI_ARB_ENABLE); | |
1229 | ||
17ee950d AS |
1230 | wa_ctx_emit(batch, MI_BATCH_BUFFER_END); |
1231 | ||
1232 | return wa_ctx_end(wa_ctx, *offset = index, 1); | |
1233 | } | |
1234 | ||
1235 | static int lrc_setup_wa_ctx_obj(struct intel_engine_cs *ring, u32 size) | |
1236 | { | |
1237 | int ret; | |
1238 | ||
1239 | ring->wa_ctx.obj = i915_gem_alloc_object(ring->dev, PAGE_ALIGN(size)); | |
1240 | if (!ring->wa_ctx.obj) { | |
1241 | DRM_DEBUG_DRIVER("alloc LRC WA ctx backing obj failed.\n"); | |
1242 | return -ENOMEM; | |
1243 | } | |
1244 | ||
1245 | ret = i915_gem_obj_ggtt_pin(ring->wa_ctx.obj, PAGE_SIZE, 0); | |
1246 | if (ret) { | |
1247 | DRM_DEBUG_DRIVER("pin LRC WA ctx backing obj failed: %d\n", | |
1248 | ret); | |
1249 | drm_gem_object_unreference(&ring->wa_ctx.obj->base); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | static void lrc_destroy_wa_ctx_obj(struct intel_engine_cs *ring) | |
1257 | { | |
1258 | if (ring->wa_ctx.obj) { | |
1259 | i915_gem_object_ggtt_unpin(ring->wa_ctx.obj); | |
1260 | drm_gem_object_unreference(&ring->wa_ctx.obj->base); | |
1261 | ring->wa_ctx.obj = NULL; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | static int intel_init_workaround_bb(struct intel_engine_cs *ring) | |
1266 | { | |
1267 | int ret; | |
1268 | uint32_t *batch; | |
1269 | uint32_t offset; | |
1270 | struct page *page; | |
1271 | struct i915_ctx_workarounds *wa_ctx = &ring->wa_ctx; | |
1272 | ||
1273 | WARN_ON(ring->id != RCS); | |
1274 | ||
5e60d790 AS |
1275 | /* update this when WA for higher Gen are added */ |
1276 | if (WARN(INTEL_INFO(ring->dev)->gen > 8, | |
1277 | "WA batch buffer is not initialized for Gen%d\n", | |
1278 | INTEL_INFO(ring->dev)->gen)) | |
1279 | return 0; | |
1280 | ||
c4db7599 AS |
1281 | /* some WA perform writes to scratch page, ensure it is valid */ |
1282 | if (ring->scratch.obj == NULL) { | |
1283 | DRM_ERROR("scratch page not allocated for %s\n", ring->name); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
17ee950d AS |
1287 | ret = lrc_setup_wa_ctx_obj(ring, PAGE_SIZE); |
1288 | if (ret) { | |
1289 | DRM_DEBUG_DRIVER("Failed to setup context WA page: %d\n", ret); | |
1290 | return ret; | |
1291 | } | |
1292 | ||
1293 | page = i915_gem_object_get_page(wa_ctx->obj, 0); | |
1294 | batch = kmap_atomic(page); | |
1295 | offset = 0; | |
1296 | ||
1297 | if (INTEL_INFO(ring->dev)->gen == 8) { | |
1298 | ret = gen8_init_indirectctx_bb(ring, | |
1299 | &wa_ctx->indirect_ctx, | |
1300 | batch, | |
1301 | &offset); | |
1302 | if (ret) | |
1303 | goto out; | |
1304 | ||
1305 | ret = gen8_init_perctx_bb(ring, | |
1306 | &wa_ctx->per_ctx, | |
1307 | batch, | |
1308 | &offset); | |
1309 | if (ret) | |
1310 | goto out; | |
17ee950d AS |
1311 | } |
1312 | ||
1313 | out: | |
1314 | kunmap_atomic(batch); | |
1315 | if (ret) | |
1316 | lrc_destroy_wa_ctx_obj(ring); | |
1317 | ||
1318 | return ret; | |
1319 | } | |
1320 | ||
9b1136d5 OM |
1321 | static int gen8_init_common_ring(struct intel_engine_cs *ring) |
1322 | { | |
1323 | struct drm_device *dev = ring->dev; | |
1324 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1325 | ||
73d477f6 OM |
1326 | I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | ring->irq_keep_mask)); |
1327 | I915_WRITE(RING_HWSTAM(ring->mmio_base), 0xffffffff); | |
1328 | ||
9b1136d5 OM |
1329 | I915_WRITE(RING_MODE_GEN7(ring), |
1330 | _MASKED_BIT_DISABLE(GFX_REPLAY_MODE) | | |
1331 | _MASKED_BIT_ENABLE(GFX_RUN_LIST_ENABLE)); | |
1332 | POSTING_READ(RING_MODE_GEN7(ring)); | |
c0a03a2e | 1333 | ring->next_context_status_buffer = 0; |
9b1136d5 OM |
1334 | DRM_DEBUG_DRIVER("Execlists enabled for %s\n", ring->name); |
1335 | ||
1336 | memset(&ring->hangcheck, 0, sizeof(ring->hangcheck)); | |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | static int gen8_init_render_ring(struct intel_engine_cs *ring) | |
1342 | { | |
1343 | struct drm_device *dev = ring->dev; | |
1344 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1345 | int ret; | |
1346 | ||
1347 | ret = gen8_init_common_ring(ring); | |
1348 | if (ret) | |
1349 | return ret; | |
1350 | ||
1351 | /* We need to disable the AsyncFlip performance optimisations in order | |
1352 | * to use MI_WAIT_FOR_EVENT within the CS. It should already be | |
1353 | * programmed to '1' on all products. | |
1354 | * | |
1355 | * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv,bdw,chv | |
1356 | */ | |
1357 | I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE)); | |
1358 | ||
9b1136d5 OM |
1359 | I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); |
1360 | ||
771b9a53 | 1361 | return init_workarounds_ring(ring); |
9b1136d5 OM |
1362 | } |
1363 | ||
82ef822e DL |
1364 | static int gen9_init_render_ring(struct intel_engine_cs *ring) |
1365 | { | |
1366 | int ret; | |
1367 | ||
1368 | ret = gen8_init_common_ring(ring); | |
1369 | if (ret) | |
1370 | return ret; | |
1371 | ||
1372 | return init_workarounds_ring(ring); | |
1373 | } | |
1374 | ||
7a01a0a2 MT |
1375 | static int intel_logical_ring_emit_pdps(struct drm_i915_gem_request *req) |
1376 | { | |
1377 | struct i915_hw_ppgtt *ppgtt = req->ctx->ppgtt; | |
1378 | struct intel_engine_cs *ring = req->ring; | |
1379 | struct intel_ringbuffer *ringbuf = req->ringbuf; | |
1380 | const int num_lri_cmds = GEN8_LEGACY_PDPES * 2; | |
1381 | int i, ret; | |
1382 | ||
1383 | ret = intel_logical_ring_begin(req, num_lri_cmds * 2 + 2); | |
1384 | if (ret) | |
1385 | return ret; | |
1386 | ||
1387 | intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(num_lri_cmds)); | |
1388 | for (i = GEN8_LEGACY_PDPES - 1; i >= 0; i--) { | |
1389 | const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i); | |
1390 | ||
1391 | intel_logical_ring_emit(ringbuf, GEN8_RING_PDP_UDW(ring, i)); | |
1392 | intel_logical_ring_emit(ringbuf, upper_32_bits(pd_daddr)); | |
1393 | intel_logical_ring_emit(ringbuf, GEN8_RING_PDP_LDW(ring, i)); | |
1394 | intel_logical_ring_emit(ringbuf, lower_32_bits(pd_daddr)); | |
1395 | } | |
1396 | ||
1397 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
1398 | intel_logical_ring_advance(ringbuf); | |
1399 | ||
1400 | return 0; | |
1401 | } | |
1402 | ||
be795fc1 | 1403 | static int gen8_emit_bb_start(struct drm_i915_gem_request *req, |
8e004efc | 1404 | u64 offset, unsigned dispatch_flags) |
15648585 | 1405 | { |
be795fc1 | 1406 | struct intel_ringbuffer *ringbuf = req->ringbuf; |
8e004efc | 1407 | bool ppgtt = !(dispatch_flags & I915_DISPATCH_SECURE); |
15648585 OM |
1408 | int ret; |
1409 | ||
7a01a0a2 MT |
1410 | /* Don't rely in hw updating PDPs, specially in lite-restore. |
1411 | * Ideally, we should set Force PD Restore in ctx descriptor, | |
1412 | * but we can't. Force Restore would be a second option, but | |
1413 | * it is unsafe in case of lite-restore (because the ctx is | |
1414 | * not idle). */ | |
1415 | if (req->ctx->ppgtt && | |
1416 | (intel_ring_flag(req->ring) & req->ctx->ppgtt->pd_dirty_rings)) { | |
1417 | ret = intel_logical_ring_emit_pdps(req); | |
1418 | if (ret) | |
1419 | return ret; | |
1420 | ||
1421 | req->ctx->ppgtt->pd_dirty_rings &= ~intel_ring_flag(req->ring); | |
1422 | } | |
1423 | ||
4d616a29 | 1424 | ret = intel_logical_ring_begin(req, 4); |
15648585 OM |
1425 | if (ret) |
1426 | return ret; | |
1427 | ||
1428 | /* FIXME(BDW): Address space and security selectors. */ | |
6922528a AJ |
1429 | intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | |
1430 | (ppgtt<<8) | | |
1431 | (dispatch_flags & I915_DISPATCH_RS ? | |
1432 | MI_BATCH_RESOURCE_STREAMER : 0)); | |
15648585 OM |
1433 | intel_logical_ring_emit(ringbuf, lower_32_bits(offset)); |
1434 | intel_logical_ring_emit(ringbuf, upper_32_bits(offset)); | |
1435 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
1436 | intel_logical_ring_advance(ringbuf); | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
73d477f6 OM |
1441 | static bool gen8_logical_ring_get_irq(struct intel_engine_cs *ring) |
1442 | { | |
1443 | struct drm_device *dev = ring->dev; | |
1444 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1445 | unsigned long flags; | |
1446 | ||
7cd512f1 | 1447 | if (WARN_ON(!intel_irqs_enabled(dev_priv))) |
73d477f6 OM |
1448 | return false; |
1449 | ||
1450 | spin_lock_irqsave(&dev_priv->irq_lock, flags); | |
1451 | if (ring->irq_refcount++ == 0) { | |
1452 | I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | ring->irq_keep_mask)); | |
1453 | POSTING_READ(RING_IMR(ring->mmio_base)); | |
1454 | } | |
1455 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); | |
1456 | ||
1457 | return true; | |
1458 | } | |
1459 | ||
1460 | static void gen8_logical_ring_put_irq(struct intel_engine_cs *ring) | |
1461 | { | |
1462 | struct drm_device *dev = ring->dev; | |
1463 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1464 | unsigned long flags; | |
1465 | ||
1466 | spin_lock_irqsave(&dev_priv->irq_lock, flags); | |
1467 | if (--ring->irq_refcount == 0) { | |
1468 | I915_WRITE_IMR(ring, ~ring->irq_keep_mask); | |
1469 | POSTING_READ(RING_IMR(ring->mmio_base)); | |
1470 | } | |
1471 | spin_unlock_irqrestore(&dev_priv->irq_lock, flags); | |
1472 | } | |
1473 | ||
7deb4d39 | 1474 | static int gen8_emit_flush(struct drm_i915_gem_request *request, |
4712274c OM |
1475 | u32 invalidate_domains, |
1476 | u32 unused) | |
1477 | { | |
7deb4d39 | 1478 | struct intel_ringbuffer *ringbuf = request->ringbuf; |
4712274c OM |
1479 | struct intel_engine_cs *ring = ringbuf->ring; |
1480 | struct drm_device *dev = ring->dev; | |
1481 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1482 | uint32_t cmd; | |
1483 | int ret; | |
1484 | ||
4d616a29 | 1485 | ret = intel_logical_ring_begin(request, 4); |
4712274c OM |
1486 | if (ret) |
1487 | return ret; | |
1488 | ||
1489 | cmd = MI_FLUSH_DW + 1; | |
1490 | ||
f0a1fb10 CW |
1491 | /* We always require a command barrier so that subsequent |
1492 | * commands, such as breadcrumb interrupts, are strictly ordered | |
1493 | * wrt the contents of the write cache being flushed to memory | |
1494 | * (and thus being coherent from the CPU). | |
1495 | */ | |
1496 | cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; | |
1497 | ||
1498 | if (invalidate_domains & I915_GEM_GPU_DOMAINS) { | |
1499 | cmd |= MI_INVALIDATE_TLB; | |
1500 | if (ring == &dev_priv->ring[VCS]) | |
1501 | cmd |= MI_INVALIDATE_BSD; | |
4712274c OM |
1502 | } |
1503 | ||
1504 | intel_logical_ring_emit(ringbuf, cmd); | |
1505 | intel_logical_ring_emit(ringbuf, | |
1506 | I915_GEM_HWS_SCRATCH_ADDR | | |
1507 | MI_FLUSH_DW_USE_GTT); | |
1508 | intel_logical_ring_emit(ringbuf, 0); /* upper addr */ | |
1509 | intel_logical_ring_emit(ringbuf, 0); /* value */ | |
1510 | intel_logical_ring_advance(ringbuf); | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | ||
7deb4d39 | 1515 | static int gen8_emit_flush_render(struct drm_i915_gem_request *request, |
4712274c OM |
1516 | u32 invalidate_domains, |
1517 | u32 flush_domains) | |
1518 | { | |
7deb4d39 | 1519 | struct intel_ringbuffer *ringbuf = request->ringbuf; |
4712274c OM |
1520 | struct intel_engine_cs *ring = ringbuf->ring; |
1521 | u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; | |
9647ff36 | 1522 | bool vf_flush_wa; |
4712274c OM |
1523 | u32 flags = 0; |
1524 | int ret; | |
1525 | ||
1526 | flags |= PIPE_CONTROL_CS_STALL; | |
1527 | ||
1528 | if (flush_domains) { | |
1529 | flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; | |
1530 | flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; | |
1531 | } | |
1532 | ||
1533 | if (invalidate_domains) { | |
1534 | flags |= PIPE_CONTROL_TLB_INVALIDATE; | |
1535 | flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; | |
1536 | flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; | |
1537 | flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; | |
1538 | flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; | |
1539 | flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; | |
1540 | flags |= PIPE_CONTROL_QW_WRITE; | |
1541 | flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; | |
1542 | } | |
1543 | ||
9647ff36 ID |
1544 | /* |
1545 | * On GEN9+ Before VF_CACHE_INVALIDATE we need to emit a NULL pipe | |
1546 | * control. | |
1547 | */ | |
1548 | vf_flush_wa = INTEL_INFO(ring->dev)->gen >= 9 && | |
1549 | flags & PIPE_CONTROL_VF_CACHE_INVALIDATE; | |
1550 | ||
4d616a29 | 1551 | ret = intel_logical_ring_begin(request, vf_flush_wa ? 12 : 6); |
4712274c OM |
1552 | if (ret) |
1553 | return ret; | |
1554 | ||
9647ff36 ID |
1555 | if (vf_flush_wa) { |
1556 | intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6)); | |
1557 | intel_logical_ring_emit(ringbuf, 0); | |
1558 | intel_logical_ring_emit(ringbuf, 0); | |
1559 | intel_logical_ring_emit(ringbuf, 0); | |
1560 | intel_logical_ring_emit(ringbuf, 0); | |
1561 | intel_logical_ring_emit(ringbuf, 0); | |
1562 | } | |
1563 | ||
4712274c OM |
1564 | intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6)); |
1565 | intel_logical_ring_emit(ringbuf, flags); | |
1566 | intel_logical_ring_emit(ringbuf, scratch_addr); | |
1567 | intel_logical_ring_emit(ringbuf, 0); | |
1568 | intel_logical_ring_emit(ringbuf, 0); | |
1569 | intel_logical_ring_emit(ringbuf, 0); | |
1570 | intel_logical_ring_advance(ringbuf); | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | ||
e94e37ad OM |
1575 | static u32 gen8_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency) |
1576 | { | |
1577 | return intel_read_status_page(ring, I915_GEM_HWS_INDEX); | |
1578 | } | |
1579 | ||
1580 | static void gen8_set_seqno(struct intel_engine_cs *ring, u32 seqno) | |
1581 | { | |
1582 | intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno); | |
1583 | } | |
1584 | ||
c4e76638 | 1585 | static int gen8_emit_request(struct drm_i915_gem_request *request) |
4da46e1e | 1586 | { |
c4e76638 | 1587 | struct intel_ringbuffer *ringbuf = request->ringbuf; |
4da46e1e OM |
1588 | struct intel_engine_cs *ring = ringbuf->ring; |
1589 | u32 cmd; | |
1590 | int ret; | |
1591 | ||
53292cdb MT |
1592 | /* |
1593 | * Reserve space for 2 NOOPs at the end of each request to be | |
1594 | * used as a workaround for not being allowed to do lite | |
1595 | * restore with HEAD==TAIL (WaIdleLiteRestore). | |
1596 | */ | |
4d616a29 | 1597 | ret = intel_logical_ring_begin(request, 8); |
4da46e1e OM |
1598 | if (ret) |
1599 | return ret; | |
1600 | ||
8edfbb8b | 1601 | cmd = MI_STORE_DWORD_IMM_GEN4; |
4da46e1e OM |
1602 | cmd |= MI_GLOBAL_GTT; |
1603 | ||
1604 | intel_logical_ring_emit(ringbuf, cmd); | |
1605 | intel_logical_ring_emit(ringbuf, | |
1606 | (ring->status_page.gfx_addr + | |
1607 | (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT))); | |
1608 | intel_logical_ring_emit(ringbuf, 0); | |
c4e76638 | 1609 | intel_logical_ring_emit(ringbuf, i915_gem_request_get_seqno(request)); |
4da46e1e OM |
1610 | intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT); |
1611 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
ae70797d | 1612 | intel_logical_ring_advance_and_submit(request); |
4da46e1e | 1613 | |
53292cdb MT |
1614 | /* |
1615 | * Here we add two extra NOOPs as padding to avoid | |
1616 | * lite restore of a context with HEAD==TAIL. | |
1617 | */ | |
1618 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
1619 | intel_logical_ring_emit(ringbuf, MI_NOOP); | |
1620 | intel_logical_ring_advance(ringbuf); | |
1621 | ||
4da46e1e OM |
1622 | return 0; |
1623 | } | |
1624 | ||
be01363f | 1625 | static int intel_lr_context_render_state_init(struct drm_i915_gem_request *req) |
cef437ad | 1626 | { |
cef437ad | 1627 | struct render_state so; |
cef437ad DL |
1628 | int ret; |
1629 | ||
be01363f | 1630 | ret = i915_gem_render_state_prepare(req->ring, &so); |
cef437ad DL |
1631 | if (ret) |
1632 | return ret; | |
1633 | ||
1634 | if (so.rodata == NULL) | |
1635 | return 0; | |
1636 | ||
be795fc1 | 1637 | ret = req->ring->emit_bb_start(req, so.ggtt_offset, |
be01363f | 1638 | I915_DISPATCH_SECURE); |
cef437ad DL |
1639 | if (ret) |
1640 | goto out; | |
1641 | ||
b2af0376 | 1642 | i915_vma_move_to_active(i915_gem_obj_to_ggtt(so.obj), req); |
cef437ad | 1643 | |
cef437ad DL |
1644 | out: |
1645 | i915_gem_render_state_fini(&so); | |
1646 | return ret; | |
1647 | } | |
1648 | ||
8753181e | 1649 | static int gen8_init_rcs_context(struct drm_i915_gem_request *req) |
e7778be1 TD |
1650 | { |
1651 | int ret; | |
1652 | ||
e2be4faf | 1653 | ret = intel_logical_ring_workarounds_emit(req); |
e7778be1 TD |
1654 | if (ret) |
1655 | return ret; | |
1656 | ||
be01363f | 1657 | return intel_lr_context_render_state_init(req); |
e7778be1 TD |
1658 | } |
1659 | ||
73e4d07f OM |
1660 | /** |
1661 | * intel_logical_ring_cleanup() - deallocate the Engine Command Streamer | |
1662 | * | |
1663 | * @ring: Engine Command Streamer. | |
1664 | * | |
1665 | */ | |
454afebd OM |
1666 | void intel_logical_ring_cleanup(struct intel_engine_cs *ring) |
1667 | { | |
6402c330 | 1668 | struct drm_i915_private *dev_priv; |
9832b9da | 1669 | |
48d82387 OM |
1670 | if (!intel_ring_initialized(ring)) |
1671 | return; | |
1672 | ||
6402c330 JH |
1673 | dev_priv = ring->dev->dev_private; |
1674 | ||
9832b9da OM |
1675 | intel_logical_ring_stop(ring); |
1676 | WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0); | |
48d82387 OM |
1677 | |
1678 | if (ring->cleanup) | |
1679 | ring->cleanup(ring); | |
1680 | ||
1681 | i915_cmd_parser_fini_ring(ring); | |
06fbca71 | 1682 | i915_gem_batch_pool_fini(&ring->batch_pool); |
48d82387 OM |
1683 | |
1684 | if (ring->status_page.obj) { | |
1685 | kunmap(sg_page(ring->status_page.obj->pages->sgl)); | |
1686 | ring->status_page.obj = NULL; | |
1687 | } | |
17ee950d AS |
1688 | |
1689 | lrc_destroy_wa_ctx_obj(ring); | |
454afebd OM |
1690 | } |
1691 | ||
1692 | static int logical_ring_init(struct drm_device *dev, struct intel_engine_cs *ring) | |
1693 | { | |
48d82387 | 1694 | int ret; |
48d82387 OM |
1695 | |
1696 | /* Intentionally left blank. */ | |
1697 | ring->buffer = NULL; | |
1698 | ||
1699 | ring->dev = dev; | |
1700 | INIT_LIST_HEAD(&ring->active_list); | |
1701 | INIT_LIST_HEAD(&ring->request_list); | |
06fbca71 | 1702 | i915_gem_batch_pool_init(dev, &ring->batch_pool); |
48d82387 OM |
1703 | init_waitqueue_head(&ring->irq_queue); |
1704 | ||
acdd884a | 1705 | INIT_LIST_HEAD(&ring->execlist_queue); |
c86ee3a9 | 1706 | INIT_LIST_HEAD(&ring->execlist_retired_req_list); |
acdd884a MT |
1707 | spin_lock_init(&ring->execlist_lock); |
1708 | ||
48d82387 OM |
1709 | ret = i915_cmd_parser_init_ring(ring); |
1710 | if (ret) | |
1711 | return ret; | |
1712 | ||
564ddb2f OM |
1713 | ret = intel_lr_context_deferred_create(ring->default_context, ring); |
1714 | ||
1715 | return ret; | |
454afebd OM |
1716 | } |
1717 | ||
1718 | static int logical_render_ring_init(struct drm_device *dev) | |
1719 | { | |
1720 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1721 | struct intel_engine_cs *ring = &dev_priv->ring[RCS]; | |
99be1dfe | 1722 | int ret; |
454afebd OM |
1723 | |
1724 | ring->name = "render ring"; | |
1725 | ring->id = RCS; | |
1726 | ring->mmio_base = RENDER_RING_BASE; | |
1727 | ring->irq_enable_mask = | |
1728 | GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT; | |
73d477f6 OM |
1729 | ring->irq_keep_mask = |
1730 | GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT; | |
1731 | if (HAS_L3_DPF(dev)) | |
1732 | ring->irq_keep_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT; | |
454afebd | 1733 | |
82ef822e DL |
1734 | if (INTEL_INFO(dev)->gen >= 9) |
1735 | ring->init_hw = gen9_init_render_ring; | |
1736 | else | |
1737 | ring->init_hw = gen8_init_render_ring; | |
e7778be1 | 1738 | ring->init_context = gen8_init_rcs_context; |
9b1136d5 | 1739 | ring->cleanup = intel_fini_pipe_control; |
e94e37ad OM |
1740 | ring->get_seqno = gen8_get_seqno; |
1741 | ring->set_seqno = gen8_set_seqno; | |
4da46e1e | 1742 | ring->emit_request = gen8_emit_request; |
4712274c | 1743 | ring->emit_flush = gen8_emit_flush_render; |
73d477f6 OM |
1744 | ring->irq_get = gen8_logical_ring_get_irq; |
1745 | ring->irq_put = gen8_logical_ring_put_irq; | |
15648585 | 1746 | ring->emit_bb_start = gen8_emit_bb_start; |
9b1136d5 | 1747 | |
99be1dfe | 1748 | ring->dev = dev; |
c4db7599 AS |
1749 | |
1750 | ret = intel_init_pipe_control(ring); | |
99be1dfe DV |
1751 | if (ret) |
1752 | return ret; | |
1753 | ||
17ee950d AS |
1754 | ret = intel_init_workaround_bb(ring); |
1755 | if (ret) { | |
1756 | /* | |
1757 | * We continue even if we fail to initialize WA batch | |
1758 | * because we only expect rare glitches but nothing | |
1759 | * critical to prevent us from using GPU | |
1760 | */ | |
1761 | DRM_ERROR("WA batch buffer initialization failed: %d\n", | |
1762 | ret); | |
1763 | } | |
1764 | ||
c4db7599 AS |
1765 | ret = logical_ring_init(dev, ring); |
1766 | if (ret) { | |
17ee950d | 1767 | lrc_destroy_wa_ctx_obj(ring); |
c4db7599 | 1768 | } |
17ee950d AS |
1769 | |
1770 | return ret; | |
454afebd OM |
1771 | } |
1772 | ||
1773 | static int logical_bsd_ring_init(struct drm_device *dev) | |
1774 | { | |
1775 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1776 | struct intel_engine_cs *ring = &dev_priv->ring[VCS]; | |
1777 | ||
1778 | ring->name = "bsd ring"; | |
1779 | ring->id = VCS; | |
1780 | ring->mmio_base = GEN6_BSD_RING_BASE; | |
1781 | ring->irq_enable_mask = | |
1782 | GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; | |
73d477f6 OM |
1783 | ring->irq_keep_mask = |
1784 | GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; | |
454afebd | 1785 | |
ecfe00d8 | 1786 | ring->init_hw = gen8_init_common_ring; |
e94e37ad OM |
1787 | ring->get_seqno = gen8_get_seqno; |
1788 | ring->set_seqno = gen8_set_seqno; | |
4da46e1e | 1789 | ring->emit_request = gen8_emit_request; |
4712274c | 1790 | ring->emit_flush = gen8_emit_flush; |
73d477f6 OM |
1791 | ring->irq_get = gen8_logical_ring_get_irq; |
1792 | ring->irq_put = gen8_logical_ring_put_irq; | |
15648585 | 1793 | ring->emit_bb_start = gen8_emit_bb_start; |
9b1136d5 | 1794 | |
454afebd OM |
1795 | return logical_ring_init(dev, ring); |
1796 | } | |
1797 | ||
1798 | static int logical_bsd2_ring_init(struct drm_device *dev) | |
1799 | { | |
1800 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1801 | struct intel_engine_cs *ring = &dev_priv->ring[VCS2]; | |
1802 | ||
1803 | ring->name = "bds2 ring"; | |
1804 | ring->id = VCS2; | |
1805 | ring->mmio_base = GEN8_BSD2_RING_BASE; | |
1806 | ring->irq_enable_mask = | |
1807 | GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; | |
73d477f6 OM |
1808 | ring->irq_keep_mask = |
1809 | GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; | |
454afebd | 1810 | |
ecfe00d8 | 1811 | ring->init_hw = gen8_init_common_ring; |
e94e37ad OM |
1812 | ring->get_seqno = gen8_get_seqno; |
1813 | ring->set_seqno = gen8_set_seqno; | |
4da46e1e | 1814 | ring->emit_request = gen8_emit_request; |
4712274c | 1815 | ring->emit_flush = gen8_emit_flush; |
73d477f6 OM |
1816 | ring->irq_get = gen8_logical_ring_get_irq; |
1817 | ring->irq_put = gen8_logical_ring_put_irq; | |
15648585 | 1818 | ring->emit_bb_start = gen8_emit_bb_start; |
9b1136d5 | 1819 | |
454afebd OM |
1820 | return logical_ring_init(dev, ring); |
1821 | } | |
1822 | ||
1823 | static int logical_blt_ring_init(struct drm_device *dev) | |
1824 | { | |
1825 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1826 | struct intel_engine_cs *ring = &dev_priv->ring[BCS]; | |
1827 | ||
1828 | ring->name = "blitter ring"; | |
1829 | ring->id = BCS; | |
1830 | ring->mmio_base = BLT_RING_BASE; | |
1831 | ring->irq_enable_mask = | |
1832 | GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT; | |
73d477f6 OM |
1833 | ring->irq_keep_mask = |
1834 | GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT; | |
454afebd | 1835 | |
ecfe00d8 | 1836 | ring->init_hw = gen8_init_common_ring; |
e94e37ad OM |
1837 | ring->get_seqno = gen8_get_seqno; |
1838 | ring->set_seqno = gen8_set_seqno; | |
4da46e1e | 1839 | ring->emit_request = gen8_emit_request; |
4712274c | 1840 | ring->emit_flush = gen8_emit_flush; |
73d477f6 OM |
1841 | ring->irq_get = gen8_logical_ring_get_irq; |
1842 | ring->irq_put = gen8_logical_ring_put_irq; | |
15648585 | 1843 | ring->emit_bb_start = gen8_emit_bb_start; |
9b1136d5 | 1844 | |
454afebd OM |
1845 | return logical_ring_init(dev, ring); |
1846 | } | |
1847 | ||
1848 | static int logical_vebox_ring_init(struct drm_device *dev) | |
1849 | { | |
1850 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1851 | struct intel_engine_cs *ring = &dev_priv->ring[VECS]; | |
1852 | ||
1853 | ring->name = "video enhancement ring"; | |
1854 | ring->id = VECS; | |
1855 | ring->mmio_base = VEBOX_RING_BASE; | |
1856 | ring->irq_enable_mask = | |
1857 | GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT; | |
73d477f6 OM |
1858 | ring->irq_keep_mask = |
1859 | GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT; | |
454afebd | 1860 | |
ecfe00d8 | 1861 | ring->init_hw = gen8_init_common_ring; |
e94e37ad OM |
1862 | ring->get_seqno = gen8_get_seqno; |
1863 | ring->set_seqno = gen8_set_seqno; | |
4da46e1e | 1864 | ring->emit_request = gen8_emit_request; |
4712274c | 1865 | ring->emit_flush = gen8_emit_flush; |
73d477f6 OM |
1866 | ring->irq_get = gen8_logical_ring_get_irq; |
1867 | ring->irq_put = gen8_logical_ring_put_irq; | |
15648585 | 1868 | ring->emit_bb_start = gen8_emit_bb_start; |
9b1136d5 | 1869 | |
454afebd OM |
1870 | return logical_ring_init(dev, ring); |
1871 | } | |
1872 | ||
73e4d07f OM |
1873 | /** |
1874 | * intel_logical_rings_init() - allocate, populate and init the Engine Command Streamers | |
1875 | * @dev: DRM device. | |
1876 | * | |
1877 | * This function inits the engines for an Execlists submission style (the equivalent in the | |
1878 | * legacy ringbuffer submission world would be i915_gem_init_rings). It does it only for | |
1879 | * those engines that are present in the hardware. | |
1880 | * | |
1881 | * Return: non-zero if the initialization failed. | |
1882 | */ | |
454afebd OM |
1883 | int intel_logical_rings_init(struct drm_device *dev) |
1884 | { | |
1885 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1886 | int ret; | |
1887 | ||
1888 | ret = logical_render_ring_init(dev); | |
1889 | if (ret) | |
1890 | return ret; | |
1891 | ||
1892 | if (HAS_BSD(dev)) { | |
1893 | ret = logical_bsd_ring_init(dev); | |
1894 | if (ret) | |
1895 | goto cleanup_render_ring; | |
1896 | } | |
1897 | ||
1898 | if (HAS_BLT(dev)) { | |
1899 | ret = logical_blt_ring_init(dev); | |
1900 | if (ret) | |
1901 | goto cleanup_bsd_ring; | |
1902 | } | |
1903 | ||
1904 | if (HAS_VEBOX(dev)) { | |
1905 | ret = logical_vebox_ring_init(dev); | |
1906 | if (ret) | |
1907 | goto cleanup_blt_ring; | |
1908 | } | |
1909 | ||
1910 | if (HAS_BSD2(dev)) { | |
1911 | ret = logical_bsd2_ring_init(dev); | |
1912 | if (ret) | |
1913 | goto cleanup_vebox_ring; | |
1914 | } | |
1915 | ||
1916 | ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000)); | |
1917 | if (ret) | |
1918 | goto cleanup_bsd2_ring; | |
1919 | ||
1920 | return 0; | |
1921 | ||
1922 | cleanup_bsd2_ring: | |
1923 | intel_logical_ring_cleanup(&dev_priv->ring[VCS2]); | |
1924 | cleanup_vebox_ring: | |
1925 | intel_logical_ring_cleanup(&dev_priv->ring[VECS]); | |
1926 | cleanup_blt_ring: | |
1927 | intel_logical_ring_cleanup(&dev_priv->ring[BCS]); | |
1928 | cleanup_bsd_ring: | |
1929 | intel_logical_ring_cleanup(&dev_priv->ring[VCS]); | |
1930 | cleanup_render_ring: | |
1931 | intel_logical_ring_cleanup(&dev_priv->ring[RCS]); | |
1932 | ||
1933 | return ret; | |
1934 | } | |
1935 | ||
0cea6502 JM |
1936 | static u32 |
1937 | make_rpcs(struct drm_device *dev) | |
1938 | { | |
1939 | u32 rpcs = 0; | |
1940 | ||
1941 | /* | |
1942 | * No explicit RPCS request is needed to ensure full | |
1943 | * slice/subslice/EU enablement prior to Gen9. | |
1944 | */ | |
1945 | if (INTEL_INFO(dev)->gen < 9) | |
1946 | return 0; | |
1947 | ||
1948 | /* | |
1949 | * Starting in Gen9, render power gating can leave | |
1950 | * slice/subslice/EU in a partially enabled state. We | |
1951 | * must make an explicit request through RPCS for full | |
1952 | * enablement. | |
1953 | */ | |
1954 | if (INTEL_INFO(dev)->has_slice_pg) { | |
1955 | rpcs |= GEN8_RPCS_S_CNT_ENABLE; | |
1956 | rpcs |= INTEL_INFO(dev)->slice_total << | |
1957 | GEN8_RPCS_S_CNT_SHIFT; | |
1958 | rpcs |= GEN8_RPCS_ENABLE; | |
1959 | } | |
1960 | ||
1961 | if (INTEL_INFO(dev)->has_subslice_pg) { | |
1962 | rpcs |= GEN8_RPCS_SS_CNT_ENABLE; | |
1963 | rpcs |= INTEL_INFO(dev)->subslice_per_slice << | |
1964 | GEN8_RPCS_SS_CNT_SHIFT; | |
1965 | rpcs |= GEN8_RPCS_ENABLE; | |
1966 | } | |
1967 | ||
1968 | if (INTEL_INFO(dev)->has_eu_pg) { | |
1969 | rpcs |= INTEL_INFO(dev)->eu_per_subslice << | |
1970 | GEN8_RPCS_EU_MIN_SHIFT; | |
1971 | rpcs |= INTEL_INFO(dev)->eu_per_subslice << | |
1972 | GEN8_RPCS_EU_MAX_SHIFT; | |
1973 | rpcs |= GEN8_RPCS_ENABLE; | |
1974 | } | |
1975 | ||
1976 | return rpcs; | |
1977 | } | |
1978 | ||
8670d6f9 OM |
1979 | static int |
1980 | populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_obj, | |
1981 | struct intel_engine_cs *ring, struct intel_ringbuffer *ringbuf) | |
1982 | { | |
2d965536 TD |
1983 | struct drm_device *dev = ring->dev; |
1984 | struct drm_i915_private *dev_priv = dev->dev_private; | |
ae6c4806 | 1985 | struct i915_hw_ppgtt *ppgtt = ctx->ppgtt; |
8670d6f9 OM |
1986 | struct page *page; |
1987 | uint32_t *reg_state; | |
1988 | int ret; | |
1989 | ||
2d965536 TD |
1990 | if (!ppgtt) |
1991 | ppgtt = dev_priv->mm.aliasing_ppgtt; | |
1992 | ||
8670d6f9 OM |
1993 | ret = i915_gem_object_set_to_cpu_domain(ctx_obj, true); |
1994 | if (ret) { | |
1995 | DRM_DEBUG_DRIVER("Could not set to CPU domain\n"); | |
1996 | return ret; | |
1997 | } | |
1998 | ||
1999 | ret = i915_gem_object_get_pages(ctx_obj); | |
2000 | if (ret) { | |
2001 | DRM_DEBUG_DRIVER("Could not get object pages\n"); | |
2002 | return ret; | |
2003 | } | |
2004 | ||
2005 | i915_gem_object_pin_pages(ctx_obj); | |
2006 | ||
2007 | /* The second page of the context object contains some fields which must | |
2008 | * be set up prior to the first execution. */ | |
2009 | page = i915_gem_object_get_page(ctx_obj, 1); | |
2010 | reg_state = kmap_atomic(page); | |
2011 | ||
2012 | /* A context is actually a big batch buffer with several MI_LOAD_REGISTER_IMM | |
2013 | * commands followed by (reg, value) pairs. The values we are setting here are | |
2014 | * only for the first context restore: on a subsequent save, the GPU will | |
2015 | * recreate this batchbuffer with new values (including all the missing | |
2016 | * MI_LOAD_REGISTER_IMM commands that we are not initializing here). */ | |
2017 | if (ring->id == RCS) | |
2018 | reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(14); | |
2019 | else | |
2020 | reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(11); | |
2021 | reg_state[CTX_LRI_HEADER_0] |= MI_LRI_FORCE_POSTED; | |
2022 | reg_state[CTX_CONTEXT_CONTROL] = RING_CONTEXT_CONTROL(ring); | |
2023 | reg_state[CTX_CONTEXT_CONTROL+1] = | |
5baa22c5 | 2024 | _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH | |
6922528a AJ |
2025 | CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT | |
2026 | CTX_CTRL_RS_CTX_ENABLE); | |
8670d6f9 OM |
2027 | reg_state[CTX_RING_HEAD] = RING_HEAD(ring->mmio_base); |
2028 | reg_state[CTX_RING_HEAD+1] = 0; | |
2029 | reg_state[CTX_RING_TAIL] = RING_TAIL(ring->mmio_base); | |
2030 | reg_state[CTX_RING_TAIL+1] = 0; | |
2031 | reg_state[CTX_RING_BUFFER_START] = RING_START(ring->mmio_base); | |
7ba717cf TD |
2032 | /* Ring buffer start address is not known until the buffer is pinned. |
2033 | * It is written to the context image in execlists_update_context() | |
2034 | */ | |
8670d6f9 OM |
2035 | reg_state[CTX_RING_BUFFER_CONTROL] = RING_CTL(ring->mmio_base); |
2036 | reg_state[CTX_RING_BUFFER_CONTROL+1] = | |
2037 | ((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) | RING_VALID; | |
2038 | reg_state[CTX_BB_HEAD_U] = ring->mmio_base + 0x168; | |
2039 | reg_state[CTX_BB_HEAD_U+1] = 0; | |
2040 | reg_state[CTX_BB_HEAD_L] = ring->mmio_base + 0x140; | |
2041 | reg_state[CTX_BB_HEAD_L+1] = 0; | |
2042 | reg_state[CTX_BB_STATE] = ring->mmio_base + 0x110; | |
2043 | reg_state[CTX_BB_STATE+1] = (1<<5); | |
2044 | reg_state[CTX_SECOND_BB_HEAD_U] = ring->mmio_base + 0x11c; | |
2045 | reg_state[CTX_SECOND_BB_HEAD_U+1] = 0; | |
2046 | reg_state[CTX_SECOND_BB_HEAD_L] = ring->mmio_base + 0x114; | |
2047 | reg_state[CTX_SECOND_BB_HEAD_L+1] = 0; | |
2048 | reg_state[CTX_SECOND_BB_STATE] = ring->mmio_base + 0x118; | |
2049 | reg_state[CTX_SECOND_BB_STATE+1] = 0; | |
2050 | if (ring->id == RCS) { | |
8670d6f9 OM |
2051 | reg_state[CTX_BB_PER_CTX_PTR] = ring->mmio_base + 0x1c0; |
2052 | reg_state[CTX_BB_PER_CTX_PTR+1] = 0; | |
2053 | reg_state[CTX_RCS_INDIRECT_CTX] = ring->mmio_base + 0x1c4; | |
2054 | reg_state[CTX_RCS_INDIRECT_CTX+1] = 0; | |
2055 | reg_state[CTX_RCS_INDIRECT_CTX_OFFSET] = ring->mmio_base + 0x1c8; | |
2056 | reg_state[CTX_RCS_INDIRECT_CTX_OFFSET+1] = 0; | |
17ee950d AS |
2057 | if (ring->wa_ctx.obj) { |
2058 | struct i915_ctx_workarounds *wa_ctx = &ring->wa_ctx; | |
2059 | uint32_t ggtt_offset = i915_gem_obj_ggtt_offset(wa_ctx->obj); | |
2060 | ||
2061 | reg_state[CTX_RCS_INDIRECT_CTX+1] = | |
2062 | (ggtt_offset + wa_ctx->indirect_ctx.offset * sizeof(uint32_t)) | | |
2063 | (wa_ctx->indirect_ctx.size / CACHELINE_DWORDS); | |
2064 | ||
2065 | reg_state[CTX_RCS_INDIRECT_CTX_OFFSET+1] = | |
2066 | CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT << 6; | |
2067 | ||
2068 | reg_state[CTX_BB_PER_CTX_PTR+1] = | |
2069 | (ggtt_offset + wa_ctx->per_ctx.offset * sizeof(uint32_t)) | | |
2070 | 0x01; | |
2071 | } | |
8670d6f9 OM |
2072 | } |
2073 | reg_state[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9); | |
2074 | reg_state[CTX_LRI_HEADER_1] |= MI_LRI_FORCE_POSTED; | |
2075 | reg_state[CTX_CTX_TIMESTAMP] = ring->mmio_base + 0x3a8; | |
2076 | reg_state[CTX_CTX_TIMESTAMP+1] = 0; | |
2077 | reg_state[CTX_PDP3_UDW] = GEN8_RING_PDP_UDW(ring, 3); | |
2078 | reg_state[CTX_PDP3_LDW] = GEN8_RING_PDP_LDW(ring, 3); | |
2079 | reg_state[CTX_PDP2_UDW] = GEN8_RING_PDP_UDW(ring, 2); | |
2080 | reg_state[CTX_PDP2_LDW] = GEN8_RING_PDP_LDW(ring, 2); | |
2081 | reg_state[CTX_PDP1_UDW] = GEN8_RING_PDP_UDW(ring, 1); | |
2082 | reg_state[CTX_PDP1_LDW] = GEN8_RING_PDP_LDW(ring, 1); | |
2083 | reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0); | |
2084 | reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0); | |
d7b2633d MT |
2085 | |
2086 | /* With dynamic page allocation, PDPs may not be allocated at this point, | |
2087 | * Point the unallocated PDPs to the scratch page | |
e5815a2e MT |
2088 | */ |
2089 | ASSIGN_CTX_PDP(ppgtt, reg_state, 3); | |
2090 | ASSIGN_CTX_PDP(ppgtt, reg_state, 2); | |
2091 | ASSIGN_CTX_PDP(ppgtt, reg_state, 1); | |
2092 | ASSIGN_CTX_PDP(ppgtt, reg_state, 0); | |
8670d6f9 OM |
2093 | if (ring->id == RCS) { |
2094 | reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1); | |
0cea6502 JM |
2095 | reg_state[CTX_R_PWR_CLK_STATE] = GEN8_R_PWR_CLK_STATE; |
2096 | reg_state[CTX_R_PWR_CLK_STATE+1] = make_rpcs(dev); | |
8670d6f9 OM |
2097 | } |
2098 | ||
2099 | kunmap_atomic(reg_state); | |
2100 | ||
2101 | ctx_obj->dirty = 1; | |
2102 | set_page_dirty(page); | |
2103 | i915_gem_object_unpin_pages(ctx_obj); | |
2104 | ||
2105 | return 0; | |
2106 | } | |
2107 | ||
73e4d07f OM |
2108 | /** |
2109 | * intel_lr_context_free() - free the LRC specific bits of a context | |
2110 | * @ctx: the LR context to free. | |
2111 | * | |
2112 | * The real context freeing is done in i915_gem_context_free: this only | |
2113 | * takes care of the bits that are LRC related: the per-engine backing | |
2114 | * objects and the logical ringbuffer. | |
2115 | */ | |
ede7d42b OM |
2116 | void intel_lr_context_free(struct intel_context *ctx) |
2117 | { | |
8c857917 OM |
2118 | int i; |
2119 | ||
2120 | for (i = 0; i < I915_NUM_RINGS; i++) { | |
2121 | struct drm_i915_gem_object *ctx_obj = ctx->engine[i].state; | |
84c2377f | 2122 | |
8c857917 | 2123 | if (ctx_obj) { |
dcb4c12a OM |
2124 | struct intel_ringbuffer *ringbuf = |
2125 | ctx->engine[i].ringbuf; | |
2126 | struct intel_engine_cs *ring = ringbuf->ring; | |
2127 | ||
7ba717cf TD |
2128 | if (ctx == ring->default_context) { |
2129 | intel_unpin_ringbuffer_obj(ringbuf); | |
2130 | i915_gem_object_ggtt_unpin(ctx_obj); | |
2131 | } | |
a7cbedec | 2132 | WARN_ON(ctx->engine[ring->id].pin_count); |
84c2377f OM |
2133 | intel_destroy_ringbuffer_obj(ringbuf); |
2134 | kfree(ringbuf); | |
8c857917 OM |
2135 | drm_gem_object_unreference(&ctx_obj->base); |
2136 | } | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | static uint32_t get_lr_context_size(struct intel_engine_cs *ring) | |
2141 | { | |
2142 | int ret = 0; | |
2143 | ||
468c6816 | 2144 | WARN_ON(INTEL_INFO(ring->dev)->gen < 8); |
8c857917 OM |
2145 | |
2146 | switch (ring->id) { | |
2147 | case RCS: | |
468c6816 MN |
2148 | if (INTEL_INFO(ring->dev)->gen >= 9) |
2149 | ret = GEN9_LR_CONTEXT_RENDER_SIZE; | |
2150 | else | |
2151 | ret = GEN8_LR_CONTEXT_RENDER_SIZE; | |
8c857917 OM |
2152 | break; |
2153 | case VCS: | |
2154 | case BCS: | |
2155 | case VECS: | |
2156 | case VCS2: | |
2157 | ret = GEN8_LR_CONTEXT_OTHER_SIZE; | |
2158 | break; | |
2159 | } | |
2160 | ||
2161 | return ret; | |
ede7d42b OM |
2162 | } |
2163 | ||
70b0ea86 | 2164 | static void lrc_setup_hardware_status_page(struct intel_engine_cs *ring, |
1df06b75 TD |
2165 | struct drm_i915_gem_object *default_ctx_obj) |
2166 | { | |
2167 | struct drm_i915_private *dev_priv = ring->dev->dev_private; | |
2168 | ||
2169 | /* The status page is offset 0 from the default context object | |
2170 | * in LRC mode. */ | |
2171 | ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(default_ctx_obj); | |
2172 | ring->status_page.page_addr = | |
2173 | kmap(sg_page(default_ctx_obj->pages->sgl)); | |
1df06b75 TD |
2174 | ring->status_page.obj = default_ctx_obj; |
2175 | ||
2176 | I915_WRITE(RING_HWS_PGA(ring->mmio_base), | |
2177 | (u32)ring->status_page.gfx_addr); | |
2178 | POSTING_READ(RING_HWS_PGA(ring->mmio_base)); | |
1df06b75 TD |
2179 | } |
2180 | ||
73e4d07f OM |
2181 | /** |
2182 | * intel_lr_context_deferred_create() - create the LRC specific bits of a context | |
2183 | * @ctx: LR context to create. | |
2184 | * @ring: engine to be used with the context. | |
2185 | * | |
2186 | * This function can be called more than once, with different engines, if we plan | |
2187 | * to use the context with them. The context backing objects and the ringbuffers | |
2188 | * (specially the ringbuffer backing objects) suck a lot of memory up, and that's why | |
2189 | * the creation is a deferred call: it's better to make sure first that we need to use | |
2190 | * a given ring with the context. | |
2191 | * | |
32197aab | 2192 | * Return: non-zero on error. |
73e4d07f | 2193 | */ |
ede7d42b OM |
2194 | int intel_lr_context_deferred_create(struct intel_context *ctx, |
2195 | struct intel_engine_cs *ring) | |
2196 | { | |
dcb4c12a | 2197 | const bool is_global_default_ctx = (ctx == ring->default_context); |
8c857917 OM |
2198 | struct drm_device *dev = ring->dev; |
2199 | struct drm_i915_gem_object *ctx_obj; | |
2200 | uint32_t context_size; | |
84c2377f | 2201 | struct intel_ringbuffer *ringbuf; |
8c857917 OM |
2202 | int ret; |
2203 | ||
ede7d42b | 2204 | WARN_ON(ctx->legacy_hw_ctx.rcs_state != NULL); |
bfc882b4 | 2205 | WARN_ON(ctx->engine[ring->id].state); |
ede7d42b | 2206 | |
8c857917 OM |
2207 | context_size = round_up(get_lr_context_size(ring), 4096); |
2208 | ||
149c86e7 | 2209 | ctx_obj = i915_gem_alloc_object(dev, context_size); |
3126a660 DC |
2210 | if (!ctx_obj) { |
2211 | DRM_DEBUG_DRIVER("Alloc LRC backing obj failed.\n"); | |
2212 | return -ENOMEM; | |
8c857917 OM |
2213 | } |
2214 | ||
dcb4c12a OM |
2215 | if (is_global_default_ctx) { |
2216 | ret = i915_gem_obj_ggtt_pin(ctx_obj, GEN8_LR_CONTEXT_ALIGN, 0); | |
2217 | if (ret) { | |
2218 | DRM_DEBUG_DRIVER("Pin LRC backing obj failed: %d\n", | |
2219 | ret); | |
2220 | drm_gem_object_unreference(&ctx_obj->base); | |
2221 | return ret; | |
2222 | } | |
8c857917 OM |
2223 | } |
2224 | ||
84c2377f OM |
2225 | ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL); |
2226 | if (!ringbuf) { | |
2227 | DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n", | |
2228 | ring->name); | |
84c2377f | 2229 | ret = -ENOMEM; |
7ba717cf | 2230 | goto error_unpin_ctx; |
84c2377f OM |
2231 | } |
2232 | ||
0c7dd53b | 2233 | ringbuf->ring = ring; |
582d67f0 | 2234 | |
84c2377f OM |
2235 | ringbuf->size = 32 * PAGE_SIZE; |
2236 | ringbuf->effective_size = ringbuf->size; | |
2237 | ringbuf->head = 0; | |
2238 | ringbuf->tail = 0; | |
84c2377f | 2239 | ringbuf->last_retired_head = -1; |
ebd0fd4b | 2240 | intel_ring_update_space(ringbuf); |
84c2377f | 2241 | |
7ba717cf TD |
2242 | if (ringbuf->obj == NULL) { |
2243 | ret = intel_alloc_ringbuffer_obj(dev, ringbuf); | |
2244 | if (ret) { | |
2245 | DRM_DEBUG_DRIVER( | |
2246 | "Failed to allocate ringbuffer obj %s: %d\n", | |
84c2377f | 2247 | ring->name, ret); |
7ba717cf TD |
2248 | goto error_free_rbuf; |
2249 | } | |
2250 | ||
2251 | if (is_global_default_ctx) { | |
2252 | ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf); | |
2253 | if (ret) { | |
2254 | DRM_ERROR( | |
2255 | "Failed to pin and map ringbuffer %s: %d\n", | |
2256 | ring->name, ret); | |
2257 | goto error_destroy_rbuf; | |
2258 | } | |
2259 | } | |
2260 | ||
8670d6f9 OM |
2261 | } |
2262 | ||
2263 | ret = populate_lr_context(ctx, ctx_obj, ring, ringbuf); | |
2264 | if (ret) { | |
2265 | DRM_DEBUG_DRIVER("Failed to populate LRC: %d\n", ret); | |
8670d6f9 | 2266 | goto error; |
84c2377f OM |
2267 | } |
2268 | ||
2269 | ctx->engine[ring->id].ringbuf = ringbuf; | |
8c857917 | 2270 | ctx->engine[ring->id].state = ctx_obj; |
ede7d42b | 2271 | |
70b0ea86 DV |
2272 | if (ctx == ring->default_context) |
2273 | lrc_setup_hardware_status_page(ring, ctx_obj); | |
e7778be1 | 2274 | else if (ring->id == RCS && !ctx->rcs_initialized) { |
771b9a53 | 2275 | if (ring->init_context) { |
76c39168 JH |
2276 | struct drm_i915_gem_request *req; |
2277 | ||
2278 | ret = i915_gem_request_alloc(ring, ctx, &req); | |
2279 | if (ret) | |
2280 | return ret; | |
2281 | ||
8753181e | 2282 | ret = ring->init_context(req); |
e7778be1 | 2283 | if (ret) { |
771b9a53 | 2284 | DRM_ERROR("ring init context: %d\n", ret); |
76c39168 | 2285 | i915_gem_request_cancel(req); |
e7778be1 TD |
2286 | ctx->engine[ring->id].ringbuf = NULL; |
2287 | ctx->engine[ring->id].state = NULL; | |
2288 | goto error; | |
2289 | } | |
76c39168 | 2290 | |
75289874 | 2291 | i915_add_request_no_flush(req); |
771b9a53 MT |
2292 | } |
2293 | ||
564ddb2f OM |
2294 | ctx->rcs_initialized = true; |
2295 | } | |
2296 | ||
ede7d42b | 2297 | return 0; |
8670d6f9 OM |
2298 | |
2299 | error: | |
7ba717cf TD |
2300 | if (is_global_default_ctx) |
2301 | intel_unpin_ringbuffer_obj(ringbuf); | |
2302 | error_destroy_rbuf: | |
2303 | intel_destroy_ringbuffer_obj(ringbuf); | |
2304 | error_free_rbuf: | |
8670d6f9 | 2305 | kfree(ringbuf); |
7ba717cf | 2306 | error_unpin_ctx: |
dcb4c12a OM |
2307 | if (is_global_default_ctx) |
2308 | i915_gem_object_ggtt_unpin(ctx_obj); | |
8670d6f9 OM |
2309 | drm_gem_object_unreference(&ctx_obj->base); |
2310 | return ret; | |
ede7d42b | 2311 | } |
3e5b6f05 TD |
2312 | |
2313 | void intel_lr_context_reset(struct drm_device *dev, | |
2314 | struct intel_context *ctx) | |
2315 | { | |
2316 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2317 | struct intel_engine_cs *ring; | |
2318 | int i; | |
2319 | ||
2320 | for_each_ring(ring, dev_priv, i) { | |
2321 | struct drm_i915_gem_object *ctx_obj = | |
2322 | ctx->engine[ring->id].state; | |
2323 | struct intel_ringbuffer *ringbuf = | |
2324 | ctx->engine[ring->id].ringbuf; | |
2325 | uint32_t *reg_state; | |
2326 | struct page *page; | |
2327 | ||
2328 | if (!ctx_obj) | |
2329 | continue; | |
2330 | ||
2331 | if (i915_gem_object_get_pages(ctx_obj)) { | |
2332 | WARN(1, "Failed get_pages for context obj\n"); | |
2333 | continue; | |
2334 | } | |
2335 | page = i915_gem_object_get_page(ctx_obj, 1); | |
2336 | reg_state = kmap_atomic(page); | |
2337 | ||
2338 | reg_state[CTX_RING_HEAD+1] = 0; | |
2339 | reg_state[CTX_RING_TAIL+1] = 0; | |
2340 | ||
2341 | kunmap_atomic(reg_state); | |
2342 | ||
2343 | ringbuf->head = 0; | |
2344 | ringbuf->tail = 0; | |
2345 | } | |
2346 | } |