1/*
2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Eddie Dong <eddie.dong@intel.com>
25 * Kevin Tian <kevin.tian@intel.com>
26 *
27 * Contributors:
28 * Zhi Wang <zhi.a.wang@intel.com>
29 * Changbin Du <changbin.du@intel.com>
30 * Zhenyu Wang <zhenyuw@linux.intel.com>
31 * Tina Zhang <tina.zhang@intel.com>
32 * Bing Niu <bing.niu@intel.com>
33 *
34 */
35
36#include "i915_drv.h"
37#include "i915_reg.h"
38#include "gt/intel_context.h"
39#include "gt/intel_engine_regs.h"
40#include "gt/intel_gpu_commands.h"
41#include "gt/intel_gt_regs.h"
42#include "gt/intel_ring.h"
43#include "gvt.h"
44#include "trace.h"
45
46#define GEN9_MOCS_SIZE 64
47
48struct engine_mmio {
49 enum intel_engine_id id;
50 i915_reg_t reg;
51 u32 mask;
52 bool in_context;
53 u32 value;
54};
55
56/* Raw offset is appened to each line for convenience. */
57static struct engine_mmio gen8_engine_mmio_list[] __cacheline_aligned = {
58 {RCS0, RING_MODE_GEN7(RENDER_RING_BASE), 0xffff, false}, /* 0x229c */
59 {RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
60 {RCS0, HWSTAM, 0x0, false}, /* 0x2098 */
61 {RCS0, INSTPM, 0xffff, true}, /* 0x20c0 */
62 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */
63 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */
64 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */
65 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */
66 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */
67 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */
68 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */
69 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */
70 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */
71 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */
72 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */
73 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */
74 {RCS0, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */
75 {RCS0, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */
76 {RCS0, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */
77 {RCS0, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */
78 {RCS0, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */
79 {RCS0, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */
80
81 {BCS0, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */
82 {BCS0, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */
83 {BCS0, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */
84 {BCS0, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */
85 {BCS0, RING_EXCC(BLT_RING_BASE), 0xffff, false}, /* 0x22028 */
86 {RCS0, INVALID_MMIO_REG, 0, false } /* Terminated */
87};
88
89static struct engine_mmio gen9_engine_mmio_list[] __cacheline_aligned = {
90 {RCS0, RING_MODE_GEN7(RENDER_RING_BASE), 0xffff, false}, /* 0x229c */
91 {RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
92 {RCS0, HWSTAM, 0x0, false}, /* 0x2098 */
93 {RCS0, INSTPM, 0xffff, true}, /* 0x20c0 */
94 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */
95 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */
96 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */
97 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */
98 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */
99 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */
100 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */
101 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */
102 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */
103 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */
104 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */
105 {RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */
106 {RCS0, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */
107 {RCS0, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */
108 {RCS0, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */
109 {RCS0, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */
110 {RCS0, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */
111 {RCS0, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */
112
113 {RCS0, GEN8_PRIVATE_PAT_LO, 0, false}, /* 0x40e0 */
114 {RCS0, GEN8_PRIVATE_PAT_HI, 0, false}, /* 0x40e4 */
115 {RCS0, GEN8_CS_CHICKEN1, 0xffff, true}, /* 0x2580 */
116 {RCS0, COMMON_SLICE_CHICKEN2, 0xffff, true}, /* 0x7014 */
117 {RCS0, GEN9_CS_DEBUG_MODE1, 0xffff, false}, /* 0x20ec */
118 {RCS0, _MMIO(0xb118), 0, false}, /* GEN8_L3SQCREG4 */
119 {RCS0, _MMIO(0xb11c), 0, false}, /* GEN9_SCRATCH1 */
120 {RCS0, GEN9_SCRATCH_LNCF1, 0, false}, /* 0xb008 */
121 {RCS0, GEN7_HALF_SLICE_CHICKEN1, 0xffff, true}, /* 0xe100 */
122 {RCS0, _MMIO(0xe180), 0xffff, true}, /* HALF_SLICE_CHICKEN2 */
123 {RCS0, _MMIO(0xe184), 0xffff, true}, /* GEN8_HALF_SLICE_CHICKEN3 */
124 {RCS0, _MMIO(0xe188), 0xffff, true}, /* GEN9_HALF_SLICE_CHICKEN5 */
125 {RCS0, _MMIO(0xe194), 0xffff, true}, /* GEN9_HALF_SLICE_CHICKEN7 */
126 {RCS0, _MMIO(0xe4f0), 0xffff, true}, /* GEN8_ROW_CHICKEN */
127 {RCS0, TRVATTL3PTRDW(0), 0, true}, /* 0x4de0 */
128 {RCS0, TRVATTL3PTRDW(1), 0, true}, /* 0x4de4 */
129 {RCS0, TRNULLDETCT, 0, true}, /* 0x4de8 */
130 {RCS0, TRINVTILEDETCT, 0, true}, /* 0x4dec */
131 {RCS0, TRVADR, 0, true}, /* 0x4df0 */
132 {RCS0, TRTTE, 0, true}, /* 0x4df4 */
133 {RCS0, _MMIO(0x4dfc), 0, true},
134
135 {BCS0, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */
136 {BCS0, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */
137 {BCS0, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */
138 {BCS0, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */
139 {BCS0, RING_EXCC(BLT_RING_BASE), 0xffff, false}, /* 0x22028 */
140
141 {VCS1, RING_EXCC(GEN8_BSD2_RING_BASE), 0xffff, false}, /* 0x1c028 */
142
143 {VECS0, RING_EXCC(VEBOX_RING_BASE), 0xffff, false}, /* 0x1a028 */
144
145 {RCS0, GEN8_HDC_CHICKEN1, 0xffff, true}, /* 0x7304 */
146 {RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
147 {RCS0, GEN7_UCGCTL4, 0x0, false}, /* 0x940c */
148 {RCS0, GAMT_CHKN_BIT_REG, 0x0, false}, /* 0x4ab8 */
149
150 {RCS0, GEN9_GAMT_ECO_REG_RW_IA, 0x0, false}, /* 0x4ab0 */
151 {RCS0, GEN9_CSFE_CHICKEN1_RCS, 0xffff, false}, /* 0x20d4 */
152 {RCS0, _MMIO(0x20D8), 0xffff, true}, /* 0x20d8 */
153
154 {RCS0, GEN8_GARBCNTL, 0x0, false}, /* 0xb004 */
155 {RCS0, GEN7_FF_THREAD_MODE, 0x0, false}, /* 0x20a0 */
156 {RCS0, FF_SLICE_CS_CHICKEN2, 0xffff, false}, /* 0x20e4 */
157 {RCS0, INVALID_MMIO_REG, 0, false } /* Terminated */
158};
159
160static struct {
161 bool initialized;
162 u32 control_table[I915_NUM_ENGINES][GEN9_MOCS_SIZE];
163 u32 l3cc_table[GEN9_MOCS_SIZE / 2];
164} gen9_render_mocs;
165
166static u32 gen9_mocs_mmio_offset_list[] = {
167 [RCS0] = 0xc800,
168 [VCS0] = 0xc900,
169 [VCS1] = 0xca00,
170 [BCS0] = 0xcc00,
171 [VECS0] = 0xcb00,
172};
173
174static void load_render_mocs(const struct intel_engine_cs *engine)
175{
176 struct intel_gvt *gvt = engine->i915->gvt;
177 struct intel_uncore *uncore = engine->uncore;
178 u32 cnt = gvt->engine_mmio_list.mocs_mmio_offset_list_cnt;
179 u32 *regs = gvt->engine_mmio_list.mocs_mmio_offset_list;
180 i915_reg_t offset;
181 int ring_id, i;
182
183 /* Platform doesn't have mocs mmios. */
184 if (!regs)
185 return;
186
187 for (ring_id = 0; ring_id < cnt; ring_id++) {
188 if (!HAS_ENGINE(engine->gt, ring_id))
189 continue;
190
191 offset.reg = regs[ring_id];
192 for (i = 0; i < GEN9_MOCS_SIZE; i++) {
193 gen9_render_mocs.control_table[ring_id][i] =
194 intel_uncore_read_fw(uncore, offset);
195 offset.reg += 4;
196 }
197 }
198
199 offset.reg = 0xb020;
200 for (i = 0; i < GEN9_MOCS_SIZE / 2; i++) {
201 gen9_render_mocs.l3cc_table[i] =
202 intel_uncore_read_fw(uncore, offset);
203 offset.reg += 4;
204 }
205 gen9_render_mocs.initialized = true;
206}
207
208static int
209restore_context_mmio_for_inhibit(struct intel_vgpu *vgpu,
210 struct i915_request *req)
211{
212 u32 *cs;
213 int ret;
214 struct engine_mmio *mmio;
215 struct intel_gvt *gvt = vgpu->gvt;
216 int ring_id = req->engine->id;
217 int count = gvt->engine_mmio_list.ctx_mmio_count[ring_id];
218
219 if (count == 0)
220 return 0;
221
222 ret = req->engine->emit_flush(req, EMIT_BARRIER);
223 if (ret)
224 return ret;
225
226 cs = intel_ring_begin(rq: req, num_dwords: count * 2 + 2);
227 if (IS_ERR(ptr: cs))
228 return PTR_ERR(ptr: cs);
229
230 *cs++ = MI_LOAD_REGISTER_IMM(count);
231 for (mmio = gvt->engine_mmio_list.mmio;
232 i915_mmio_reg_valid(mmio->reg); mmio++) {
233 if (mmio->id != ring_id || !mmio->in_context)
234 continue;
235
236 *cs++ = i915_mmio_reg_offset(mmio->reg);
237 *cs++ = vgpu_vreg_t(vgpu, mmio->reg) | (mmio->mask << 16);
238 gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
239 *(cs-2), *(cs-1), vgpu->id, ring_id);
240 }
241
242 *cs++ = MI_NOOP;
243 intel_ring_advance(rq: req, cs);
244
245 ret = req->engine->emit_flush(req, EMIT_BARRIER);
246 if (ret)
247 return ret;
248
249 return 0;
250}
251
252static int
253restore_render_mocs_control_for_inhibit(struct intel_vgpu *vgpu,
254 struct i915_request *req)
255{
256 unsigned int index;
257 u32 *cs;
258
259 cs = intel_ring_begin(rq: req, num_dwords: 2 * GEN9_MOCS_SIZE + 2);
260 if (IS_ERR(ptr: cs))
261 return PTR_ERR(ptr: cs);
262
263 *cs++ = MI_LOAD_REGISTER_IMM(GEN9_MOCS_SIZE);
264
265 for (index = 0; index < GEN9_MOCS_SIZE; index++) {
266 *cs++ = i915_mmio_reg_offset(GEN9_GFX_MOCS(index));
267 *cs++ = vgpu_vreg_t(vgpu, GEN9_GFX_MOCS(index));
268 gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
269 *(cs-2), *(cs-1), vgpu->id, req->engine->id);
270
271 }
272
273 *cs++ = MI_NOOP;
274 intel_ring_advance(rq: req, cs);
275
276 return 0;
277}
278
279static int
280restore_render_mocs_l3cc_for_inhibit(struct intel_vgpu *vgpu,
281 struct i915_request *req)
282{
283 unsigned int index;
284 u32 *cs;
285
286 cs = intel_ring_begin(rq: req, num_dwords: 2 * GEN9_MOCS_SIZE / 2 + 2);
287 if (IS_ERR(ptr: cs))
288 return PTR_ERR(ptr: cs);
289
290 *cs++ = MI_LOAD_REGISTER_IMM(GEN9_MOCS_SIZE / 2);
291
292 for (index = 0; index < GEN9_MOCS_SIZE / 2; index++) {
293 *cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(index));
294 *cs++ = vgpu_vreg_t(vgpu, GEN9_LNCFCMOCS(index));
295 gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
296 *(cs-2), *(cs-1), vgpu->id, req->engine->id);
297
298 }
299
300 *cs++ = MI_NOOP;
301 intel_ring_advance(rq: req, cs);
302
303 return 0;
304}
305
306/*
307 * Use lri command to initialize the mmio which is in context state image for
308 * inhibit context, it contains tracked engine mmio, render_mocs and
309 * render_mocs_l3cc.
310 */
311int intel_vgpu_restore_inhibit_context(struct intel_vgpu *vgpu,
312 struct i915_request *req)
313{
314 int ret;
315 u32 *cs;
316
317 cs = intel_ring_begin(rq: req, num_dwords: 2);
318 if (IS_ERR(ptr: cs))
319 return PTR_ERR(ptr: cs);
320
321 *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
322 *cs++ = MI_NOOP;
323 intel_ring_advance(rq: req, cs);
324
325 ret = restore_context_mmio_for_inhibit(vgpu, req);
326 if (ret)
327 goto out;
328
329 /* no MOCS register in context except render engine */
330 if (req->engine->id != RCS0)
331 goto out;
332
333 ret = restore_render_mocs_control_for_inhibit(vgpu, req);
334 if (ret)
335 goto out;
336
337 ret = restore_render_mocs_l3cc_for_inhibit(vgpu, req);
338 if (ret)
339 goto out;
340
341out:
342 cs = intel_ring_begin(rq: req, num_dwords: 2);
343 if (IS_ERR(ptr: cs))
344 return PTR_ERR(ptr: cs);
345
346 *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
347 *cs++ = MI_NOOP;
348 intel_ring_advance(rq: req, cs);
349
350 return ret;
351}
352
353static u32 gen8_tlb_mmio_offset_list[] = {
354 [RCS0] = 0x4260,
355 [VCS0] = 0x4264,
356 [VCS1] = 0x4268,
357 [BCS0] = 0x426c,
358 [VECS0] = 0x4270,
359};
360
361static void handle_tlb_pending_event(struct intel_vgpu *vgpu,
362 const struct intel_engine_cs *engine)
363{
364 struct intel_uncore *uncore = engine->uncore;
365 struct intel_vgpu_submission *s = &vgpu->submission;
366 u32 *regs = vgpu->gvt->engine_mmio_list.tlb_mmio_offset_list;
367 u32 cnt = vgpu->gvt->engine_mmio_list.tlb_mmio_offset_list_cnt;
368 enum forcewake_domains fw;
369 i915_reg_t reg;
370
371 if (!regs)
372 return;
373
374 if (drm_WARN_ON(&engine->i915->drm, engine->id >= cnt))
375 return;
376
377 if (!test_and_clear_bit(nr: engine->id, addr: (void *)s->tlb_handle_pending))
378 return;
379
380 reg = _MMIO(regs[engine->id]);
381
382 /* WaForceWakeRenderDuringMmioTLBInvalidate:skl
383 * we need to put a forcewake when invalidating RCS TLB caches,
384 * otherwise device can go to RC6 state and interrupt invalidation
385 * process
386 */
387 fw = intel_uncore_forcewake_for_reg(uncore, reg,
388 FW_REG_READ | FW_REG_WRITE);
389 if (engine->id == RCS0 && GRAPHICS_VER(engine->i915) >= 9)
390 fw |= FORCEWAKE_RENDER;
391
392 intel_uncore_forcewake_get(uncore, domains: fw);
393
394 intel_uncore_write_fw(uncore, reg, 0x1);
395
396 if (wait_for_atomic(intel_uncore_read_fw(uncore, reg) == 0, 50))
397 gvt_vgpu_err("timeout in invalidate ring %s tlb\n",
398 engine->name);
399 else
400 vgpu_vreg_t(vgpu, reg) = 0;
401
402 intel_uncore_forcewake_put(uncore, domains: fw);
403
404 gvt_dbg_core("invalidate TLB for ring %s\n", engine->name);
405}
406
407static void switch_mocs(struct intel_vgpu *pre, struct intel_vgpu *next,
408 const struct intel_engine_cs *engine)
409{
410 u32 regs[] = {
411 [RCS0] = 0xc800,
412 [VCS0] = 0xc900,
413 [VCS1] = 0xca00,
414 [BCS0] = 0xcc00,
415 [VECS0] = 0xcb00,
416 };
417 struct intel_uncore *uncore = engine->uncore;
418 i915_reg_t offset, l3_offset;
419 u32 old_v, new_v;
420 int i;
421
422 if (drm_WARN_ON(&engine->i915->drm, engine->id >= ARRAY_SIZE(regs)))
423 return;
424
425 if (engine->id == RCS0 && GRAPHICS_VER(engine->i915) == 9)
426 return;
427
428 if (!pre && !gen9_render_mocs.initialized)
429 load_render_mocs(engine);
430
431 offset.reg = regs[engine->id];
432 for (i = 0; i < GEN9_MOCS_SIZE; i++) {
433 if (pre)
434 old_v = vgpu_vreg_t(pre, offset);
435 else
436 old_v = gen9_render_mocs.control_table[engine->id][i];
437 if (next)
438 new_v = vgpu_vreg_t(next, offset);
439 else
440 new_v = gen9_render_mocs.control_table[engine->id][i];
441
442 if (old_v != new_v)
443 intel_uncore_write_fw(uncore, offset, new_v);
444
445 offset.reg += 4;
446 }
447
448 if (engine->id == RCS0) {
449 l3_offset.reg = 0xb020;
450 for (i = 0; i < GEN9_MOCS_SIZE / 2; i++) {
451 if (pre)
452 old_v = vgpu_vreg_t(pre, l3_offset);
453 else
454 old_v = gen9_render_mocs.l3cc_table[i];
455 if (next)
456 new_v = vgpu_vreg_t(next, l3_offset);
457 else
458 new_v = gen9_render_mocs.l3cc_table[i];
459
460 if (old_v != new_v)
461 intel_uncore_write_fw(uncore, l3_offset, new_v);
462
463 l3_offset.reg += 4;
464 }
465 }
466}
467
468#define CTX_CONTEXT_CONTROL_VAL 0x03
469
470bool is_inhibit_context(struct intel_context *ce)
471{
472 const u32 *reg_state = ce->lrc_reg_state;
473 u32 inhibit_mask =
474 _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
475
476 return inhibit_mask ==
477 (reg_state[CTX_CONTEXT_CONTROL_VAL] & inhibit_mask);
478}
479
480/* Switch ring mmio values (context). */
481static void switch_mmio(struct intel_vgpu *pre,
482 struct intel_vgpu *next,
483 const struct intel_engine_cs *engine)
484{
485 struct intel_uncore *uncore = engine->uncore;
486 struct intel_vgpu_submission *s;
487 struct engine_mmio *mmio;
488 u32 old_v, new_v;
489
490 if (GRAPHICS_VER(engine->i915) >= 9)
491 switch_mocs(pre, next, engine);
492
493 for (mmio = engine->i915->gvt->engine_mmio_list.mmio;
494 i915_mmio_reg_valid(mmio->reg); mmio++) {
495 if (mmio->id != engine->id)
496 continue;
497 /*
498 * No need to do save or restore of the mmio which is in context
499 * state image on gen9, it's initialized by lri command and
500 * save or restore with context together.
501 */
502 if (GRAPHICS_VER(engine->i915) == 9 && mmio->in_context)
503 continue;
504
505 // save
506 if (pre) {
507 vgpu_vreg_t(pre, mmio->reg) =
508 intel_uncore_read_fw(uncore, mmio->reg);
509 if (mmio->mask)
510 vgpu_vreg_t(pre, mmio->reg) &=
511 ~(mmio->mask << 16);
512 old_v = vgpu_vreg_t(pre, mmio->reg);
513 } else {
514 old_v = mmio->value =
515 intel_uncore_read_fw(uncore, mmio->reg);
516 }
517
518 // restore
519 if (next) {
520 s = &next->submission;
521 /*
522 * No need to restore the mmio which is in context state
523 * image if it's not inhibit context, it will restore
524 * itself.
525 */
526 if (mmio->in_context &&
527 !is_inhibit_context(ce: s->shadow[engine->id]))
528 continue;
529
530 if (mmio->mask)
531 new_v = vgpu_vreg_t(next, mmio->reg) |
532 (mmio->mask << 16);
533 else
534 new_v = vgpu_vreg_t(next, mmio->reg);
535 } else {
536 if (mmio->in_context)
537 continue;
538 if (mmio->mask)
539 new_v = mmio->value | (mmio->mask << 16);
540 else
541 new_v = mmio->value;
542 }
543
544 intel_uncore_write_fw(uncore, mmio->reg, new_v);
545
546 trace_render_mmio(old_id: pre ? pre->id : 0,
547 new_id: next ? next->id : 0,
548 action: "switch",
549 i915_mmio_reg_offset(mmio->reg),
550 old_val: old_v, new_val: new_v);
551 }
552
553 if (next)
554 handle_tlb_pending_event(vgpu: next, engine);
555}
556
557/**
558 * intel_gvt_switch_mmio - switch mmio context of specific engine
559 * @pre: the last vGPU that own the engine
560 * @next: the vGPU to switch to
561 * @engine: the engine
562 *
563 * If pre is null indicates that host own the engine. If next is null
564 * indicates that we are switching to host workload.
565 */
566void intel_gvt_switch_mmio(struct intel_vgpu *pre,
567 struct intel_vgpu *next,
568 const struct intel_engine_cs *engine)
569{
570 if (WARN(!pre && !next, "switch ring %s from host to HOST\n",
571 engine->name))
572 return;
573
574 gvt_dbg_render("switch ring %s from %s to %s\n", engine->name,
575 pre ? "vGPU" : "host", next ? "vGPU" : "HOST");
576
577 /**
578 * We are using raw mmio access wrapper to improve the
579 * performace for batch mmio read/write, so we need
580 * handle forcewake mannually.
581 */
582 intel_uncore_forcewake_get(uncore: engine->uncore, domains: FORCEWAKE_ALL);
583 switch_mmio(pre, next, engine);
584 intel_uncore_forcewake_put(uncore: engine->uncore, domains: FORCEWAKE_ALL);
585}
586
587/**
588 * intel_gvt_init_engine_mmio_context - Initiate the engine mmio list
589 * @gvt: GVT device
590 *
591 */
592void intel_gvt_init_engine_mmio_context(struct intel_gvt *gvt)
593{
594 struct engine_mmio *mmio;
595
596 if (GRAPHICS_VER(gvt->gt->i915) >= 9) {
597 gvt->engine_mmio_list.mmio = gen9_engine_mmio_list;
598 gvt->engine_mmio_list.tlb_mmio_offset_list = gen8_tlb_mmio_offset_list;
599 gvt->engine_mmio_list.tlb_mmio_offset_list_cnt = ARRAY_SIZE(gen8_tlb_mmio_offset_list);
600 gvt->engine_mmio_list.mocs_mmio_offset_list = gen9_mocs_mmio_offset_list;
601 gvt->engine_mmio_list.mocs_mmio_offset_list_cnt = ARRAY_SIZE(gen9_mocs_mmio_offset_list);
602 } else {
603 gvt->engine_mmio_list.mmio = gen8_engine_mmio_list;
604 gvt->engine_mmio_list.tlb_mmio_offset_list = gen8_tlb_mmio_offset_list;
605 gvt->engine_mmio_list.tlb_mmio_offset_list_cnt = ARRAY_SIZE(gen8_tlb_mmio_offset_list);
606 }
607
608 for (mmio = gvt->engine_mmio_list.mmio;
609 i915_mmio_reg_valid(mmio->reg); mmio++) {
610 if (mmio->in_context) {
611 gvt->engine_mmio_list.ctx_mmio_count[mmio->id]++;
612 intel_gvt_mmio_set_sr_in_ctx(gvt, offset: mmio->reg.reg);
613 }
614 }
615}
616

source code of linux/drivers/gpu/drm/i915/gvt/mmio_context.c