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 * Kevin Tian <kevin.tian@intel.com>
25 * Zhi Wang <zhi.a.wang@intel.com>
26 *
27 * Contributors:
28 * Min he <min.he@intel.com>
29 *
30 */
31
32 #include <linux/eventfd.h>
33
34 #include "i915_drv.h"
35 #include "i915_reg.h"
36 #include "gvt.h"
37 #include "trace.h"
38
39 /* common offset among interrupt control registers */
40 #define regbase_to_isr(base) (base)
41 #define regbase_to_imr(base) (base + 0x4)
42 #define regbase_to_iir(base) (base + 0x8)
43 #define regbase_to_ier(base) (base + 0xC)
44
45 #define iir_to_regbase(iir) (iir - 0x8)
46 #define ier_to_regbase(ier) (ier - 0xC)
47
48 #define get_event_virt_handler(irq, e) (irq->events[e].v_handler)
49 #define get_irq_info(irq, e) (irq->events[e].info)
50
51 #define irq_to_gvt(irq) \
52 container_of(irq, struct intel_gvt, irq)
53
54 static void update_upstream_irq(struct intel_vgpu *vgpu,
55 struct intel_gvt_irq_info *info);
56
57 static const char * const irq_name[INTEL_GVT_EVENT_MAX] = {
58 [RCS_MI_USER_INTERRUPT] = "Render CS MI USER INTERRUPT",
59 [RCS_DEBUG] = "Render EU debug from SVG",
60 [RCS_MMIO_SYNC_FLUSH] = "Render MMIO sync flush status",
61 [RCS_CMD_STREAMER_ERR] = "Render CS error interrupt",
62 [RCS_PIPE_CONTROL] = "Render PIPE CONTROL notify",
63 [RCS_WATCHDOG_EXCEEDED] = "Render CS Watchdog counter exceeded",
64 [RCS_PAGE_DIRECTORY_FAULT] = "Render page directory faults",
65 [RCS_AS_CONTEXT_SWITCH] = "Render AS Context Switch Interrupt",
66
67 [VCS_MI_USER_INTERRUPT] = "Video CS MI USER INTERRUPT",
68 [VCS_MMIO_SYNC_FLUSH] = "Video MMIO sync flush status",
69 [VCS_CMD_STREAMER_ERR] = "Video CS error interrupt",
70 [VCS_MI_FLUSH_DW] = "Video MI FLUSH DW notify",
71 [VCS_WATCHDOG_EXCEEDED] = "Video CS Watchdog counter exceeded",
72 [VCS_PAGE_DIRECTORY_FAULT] = "Video page directory faults",
73 [VCS_AS_CONTEXT_SWITCH] = "Video AS Context Switch Interrupt",
74 [VCS2_MI_USER_INTERRUPT] = "VCS2 Video CS MI USER INTERRUPT",
75 [VCS2_MI_FLUSH_DW] = "VCS2 Video MI FLUSH DW notify",
76 [VCS2_AS_CONTEXT_SWITCH] = "VCS2 Context Switch Interrupt",
77
78 [BCS_MI_USER_INTERRUPT] = "Blitter CS MI USER INTERRUPT",
79 [BCS_MMIO_SYNC_FLUSH] = "Billter MMIO sync flush status",
80 [BCS_CMD_STREAMER_ERR] = "Blitter CS error interrupt",
81 [BCS_MI_FLUSH_DW] = "Blitter MI FLUSH DW notify",
82 [BCS_PAGE_DIRECTORY_FAULT] = "Blitter page directory faults",
83 [BCS_AS_CONTEXT_SWITCH] = "Blitter AS Context Switch Interrupt",
84
85 [VECS_MI_FLUSH_DW] = "Video Enhanced Streamer MI FLUSH DW notify",
86 [VECS_AS_CONTEXT_SWITCH] = "VECS Context Switch Interrupt",
87
88 [PIPE_A_FIFO_UNDERRUN] = "Pipe A FIFO underrun",
89 [PIPE_A_CRC_ERR] = "Pipe A CRC error",
90 [PIPE_A_CRC_DONE] = "Pipe A CRC done",
91 [PIPE_A_VSYNC] = "Pipe A vsync",
92 [PIPE_A_LINE_COMPARE] = "Pipe A line compare",
93 [PIPE_A_ODD_FIELD] = "Pipe A odd field",
94 [PIPE_A_EVEN_FIELD] = "Pipe A even field",
95 [PIPE_A_VBLANK] = "Pipe A vblank",
96 [PIPE_B_FIFO_UNDERRUN] = "Pipe B FIFO underrun",
97 [PIPE_B_CRC_ERR] = "Pipe B CRC error",
98 [PIPE_B_CRC_DONE] = "Pipe B CRC done",
99 [PIPE_B_VSYNC] = "Pipe B vsync",
100 [PIPE_B_LINE_COMPARE] = "Pipe B line compare",
101 [PIPE_B_ODD_FIELD] = "Pipe B odd field",
102 [PIPE_B_EVEN_FIELD] = "Pipe B even field",
103 [PIPE_B_VBLANK] = "Pipe B vblank",
104 [PIPE_C_VBLANK] = "Pipe C vblank",
105 [DPST_PHASE_IN] = "DPST phase in event",
106 [DPST_HISTOGRAM] = "DPST histogram event",
107 [GSE] = "GSE",
108 [DP_A_HOTPLUG] = "DP A Hotplug",
109 [AUX_CHANNEL_A] = "AUX Channel A",
110 [PERF_COUNTER] = "Performance counter",
111 [POISON] = "Poison",
112 [GTT_FAULT] = "GTT fault",
113 [PRIMARY_A_FLIP_DONE] = "Primary Plane A flip done",
114 [PRIMARY_B_FLIP_DONE] = "Primary Plane B flip done",
115 [PRIMARY_C_FLIP_DONE] = "Primary Plane C flip done",
116 [SPRITE_A_FLIP_DONE] = "Sprite Plane A flip done",
117 [SPRITE_B_FLIP_DONE] = "Sprite Plane B flip done",
118 [SPRITE_C_FLIP_DONE] = "Sprite Plane C flip done",
119
120 [PCU_THERMAL] = "PCU Thermal Event",
121 [PCU_PCODE2DRIVER_MAILBOX] = "PCU pcode2driver mailbox event",
122
123 [FDI_RX_INTERRUPTS_TRANSCODER_A] = "FDI RX Interrupts Combined A",
124 [AUDIO_CP_CHANGE_TRANSCODER_A] = "Audio CP Change Transcoder A",
125 [AUDIO_CP_REQUEST_TRANSCODER_A] = "Audio CP Request Transcoder A",
126 [FDI_RX_INTERRUPTS_TRANSCODER_B] = "FDI RX Interrupts Combined B",
127 [AUDIO_CP_CHANGE_TRANSCODER_B] = "Audio CP Change Transcoder B",
128 [AUDIO_CP_REQUEST_TRANSCODER_B] = "Audio CP Request Transcoder B",
129 [FDI_RX_INTERRUPTS_TRANSCODER_C] = "FDI RX Interrupts Combined C",
130 [AUDIO_CP_CHANGE_TRANSCODER_C] = "Audio CP Change Transcoder C",
131 [AUDIO_CP_REQUEST_TRANSCODER_C] = "Audio CP Request Transcoder C",
132 [ERR_AND_DBG] = "South Error and Debug Interrupts Combined",
133 [GMBUS] = "Gmbus",
134 [SDVO_B_HOTPLUG] = "SDVO B hotplug",
135 [CRT_HOTPLUG] = "CRT Hotplug",
136 [DP_B_HOTPLUG] = "DisplayPort/HDMI/DVI B Hotplug",
137 [DP_C_HOTPLUG] = "DisplayPort/HDMI/DVI C Hotplug",
138 [DP_D_HOTPLUG] = "DisplayPort/HDMI/DVI D Hotplug",
139 [AUX_CHANNEL_B] = "AUX Channel B",
140 [AUX_CHANNEL_C] = "AUX Channel C",
141 [AUX_CHANNEL_D] = "AUX Channel D",
142 [AUDIO_POWER_STATE_CHANGE_B] = "Audio Power State change Port B",
143 [AUDIO_POWER_STATE_CHANGE_C] = "Audio Power State change Port C",
144 [AUDIO_POWER_STATE_CHANGE_D] = "Audio Power State change Port D",
145
146 [INTEL_GVT_EVENT_RESERVED] = "RESERVED EVENTS!!!",
147 };
148
regbase_to_irq_info(struct intel_gvt * gvt,unsigned int reg)149 static inline struct intel_gvt_irq_info *regbase_to_irq_info(
150 struct intel_gvt *gvt,
151 unsigned int reg)
152 {
153 struct intel_gvt_irq *irq = &gvt->irq;
154 int i;
155
156 for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
157 if (i915_mmio_reg_offset(irq->info[i]->reg_base) == reg)
158 return irq->info[i];
159 }
160
161 return NULL;
162 }
163
164 /**
165 * intel_vgpu_reg_imr_handler - Generic IMR register emulation write handler
166 * @vgpu: a vGPU
167 * @reg: register offset written by guest
168 * @p_data: register data written by guest
169 * @bytes: register data length
170 *
171 * This function is used to emulate the generic IMR register bit change
172 * behavior.
173 *
174 * Returns:
175 * Zero on success, negative error code if failed.
176 *
177 */
intel_vgpu_reg_imr_handler(struct intel_vgpu * vgpu,unsigned int reg,void * p_data,unsigned int bytes)178 int intel_vgpu_reg_imr_handler(struct intel_vgpu *vgpu,
179 unsigned int reg, void *p_data, unsigned int bytes)
180 {
181 struct intel_gvt *gvt = vgpu->gvt;
182 const struct intel_gvt_irq_ops *ops = gvt->irq.ops;
183 u32 imr = *(u32 *)p_data;
184
185 trace_write_ir(vgpu->id, "IMR", reg, imr, vgpu_vreg(vgpu, reg),
186 (vgpu_vreg(vgpu, reg) ^ imr));
187
188 vgpu_vreg(vgpu, reg) = imr;
189
190 ops->check_pending_irq(vgpu);
191
192 return 0;
193 }
194
195 /**
196 * intel_vgpu_reg_master_irq_handler - master IRQ write emulation handler
197 * @vgpu: a vGPU
198 * @reg: register offset written by guest
199 * @p_data: register data written by guest
200 * @bytes: register data length
201 *
202 * This function is used to emulate the master IRQ register on gen8+.
203 *
204 * Returns:
205 * Zero on success, negative error code if failed.
206 *
207 */
intel_vgpu_reg_master_irq_handler(struct intel_vgpu * vgpu,unsigned int reg,void * p_data,unsigned int bytes)208 int intel_vgpu_reg_master_irq_handler(struct intel_vgpu *vgpu,
209 unsigned int reg, void *p_data, unsigned int bytes)
210 {
211 struct intel_gvt *gvt = vgpu->gvt;
212 const struct intel_gvt_irq_ops *ops = gvt->irq.ops;
213 u32 ier = *(u32 *)p_data;
214 u32 virtual_ier = vgpu_vreg(vgpu, reg);
215
216 trace_write_ir(vgpu->id, "MASTER_IRQ", reg, ier, virtual_ier,
217 (virtual_ier ^ ier));
218
219 /*
220 * GEN8_MASTER_IRQ is a special irq register,
221 * only bit 31 is allowed to be modified
222 * and treated as an IER bit.
223 */
224 ier &= GEN8_MASTER_IRQ_CONTROL;
225 virtual_ier &= GEN8_MASTER_IRQ_CONTROL;
226 vgpu_vreg(vgpu, reg) &= ~GEN8_MASTER_IRQ_CONTROL;
227 vgpu_vreg(vgpu, reg) |= ier;
228
229 ops->check_pending_irq(vgpu);
230
231 return 0;
232 }
233
234 /**
235 * intel_vgpu_reg_ier_handler - Generic IER write emulation handler
236 * @vgpu: a vGPU
237 * @reg: register offset written by guest
238 * @p_data: register data written by guest
239 * @bytes: register data length
240 *
241 * This function is used to emulate the generic IER register behavior.
242 *
243 * Returns:
244 * Zero on success, negative error code if failed.
245 *
246 */
intel_vgpu_reg_ier_handler(struct intel_vgpu * vgpu,unsigned int reg,void * p_data,unsigned int bytes)247 int intel_vgpu_reg_ier_handler(struct intel_vgpu *vgpu,
248 unsigned int reg, void *p_data, unsigned int bytes)
249 {
250 struct intel_gvt *gvt = vgpu->gvt;
251 struct drm_i915_private *i915 = gvt->gt->i915;
252 const struct intel_gvt_irq_ops *ops = gvt->irq.ops;
253 struct intel_gvt_irq_info *info;
254 u32 ier = *(u32 *)p_data;
255
256 trace_write_ir(vgpu->id, "IER", reg, ier, vgpu_vreg(vgpu, reg),
257 (vgpu_vreg(vgpu, reg) ^ ier));
258
259 vgpu_vreg(vgpu, reg) = ier;
260
261 info = regbase_to_irq_info(gvt, ier_to_regbase(reg));
262 if (drm_WARN_ON(&i915->drm, !info))
263 return -EINVAL;
264
265 if (info->has_upstream_irq)
266 update_upstream_irq(vgpu, info);
267
268 ops->check_pending_irq(vgpu);
269
270 return 0;
271 }
272
273 /**
274 * intel_vgpu_reg_iir_handler - Generic IIR write emulation handler
275 * @vgpu: a vGPU
276 * @reg: register offset written by guest
277 * @p_data: register data written by guest
278 * @bytes: register data length
279 *
280 * This function is used to emulate the generic IIR register behavior.
281 *
282 * Returns:
283 * Zero on success, negative error code if failed.
284 *
285 */
intel_vgpu_reg_iir_handler(struct intel_vgpu * vgpu,unsigned int reg,void * p_data,unsigned int bytes)286 int intel_vgpu_reg_iir_handler(struct intel_vgpu *vgpu, unsigned int reg,
287 void *p_data, unsigned int bytes)
288 {
289 struct drm_i915_private *i915 = vgpu->gvt->gt->i915;
290 struct intel_gvt_irq_info *info = regbase_to_irq_info(vgpu->gvt,
291 iir_to_regbase(reg));
292 u32 iir = *(u32 *)p_data;
293
294 trace_write_ir(vgpu->id, "IIR", reg, iir, vgpu_vreg(vgpu, reg),
295 (vgpu_vreg(vgpu, reg) ^ iir));
296
297 if (drm_WARN_ON(&i915->drm, !info))
298 return -EINVAL;
299
300 vgpu_vreg(vgpu, reg) &= ~iir;
301
302 if (info->has_upstream_irq)
303 update_upstream_irq(vgpu, info);
304 return 0;
305 }
306
307 static struct intel_gvt_irq_map gen8_irq_map[] = {
308 { INTEL_GVT_IRQ_INFO_MASTER, 0, INTEL_GVT_IRQ_INFO_GT0, 0xffff },
309 { INTEL_GVT_IRQ_INFO_MASTER, 1, INTEL_GVT_IRQ_INFO_GT0, 0xffff0000 },
310 { INTEL_GVT_IRQ_INFO_MASTER, 2, INTEL_GVT_IRQ_INFO_GT1, 0xffff },
311 { INTEL_GVT_IRQ_INFO_MASTER, 3, INTEL_GVT_IRQ_INFO_GT1, 0xffff0000 },
312 { INTEL_GVT_IRQ_INFO_MASTER, 4, INTEL_GVT_IRQ_INFO_GT2, 0xffff },
313 { INTEL_GVT_IRQ_INFO_MASTER, 6, INTEL_GVT_IRQ_INFO_GT3, 0xffff },
314 { INTEL_GVT_IRQ_INFO_MASTER, 16, INTEL_GVT_IRQ_INFO_DE_PIPE_A, ~0 },
315 { INTEL_GVT_IRQ_INFO_MASTER, 17, INTEL_GVT_IRQ_INFO_DE_PIPE_B, ~0 },
316 { INTEL_GVT_IRQ_INFO_MASTER, 18, INTEL_GVT_IRQ_INFO_DE_PIPE_C, ~0 },
317 { INTEL_GVT_IRQ_INFO_MASTER, 20, INTEL_GVT_IRQ_INFO_DE_PORT, ~0 },
318 { INTEL_GVT_IRQ_INFO_MASTER, 22, INTEL_GVT_IRQ_INFO_DE_MISC, ~0 },
319 { INTEL_GVT_IRQ_INFO_MASTER, 23, INTEL_GVT_IRQ_INFO_PCH, ~0 },
320 { INTEL_GVT_IRQ_INFO_MASTER, 30, INTEL_GVT_IRQ_INFO_PCU, ~0 },
321 { -1, -1, ~0 },
322 };
323
update_upstream_irq(struct intel_vgpu * vgpu,struct intel_gvt_irq_info * info)324 static void update_upstream_irq(struct intel_vgpu *vgpu,
325 struct intel_gvt_irq_info *info)
326 {
327 struct drm_i915_private *i915 = vgpu->gvt->gt->i915;
328 struct intel_gvt_irq *irq = &vgpu->gvt->irq;
329 struct intel_gvt_irq_map *map = irq->irq_map;
330 struct intel_gvt_irq_info *up_irq_info = NULL;
331 u32 set_bits = 0;
332 u32 clear_bits = 0;
333 int bit;
334 u32 val = vgpu_vreg(vgpu,
335 regbase_to_iir(i915_mmio_reg_offset(info->reg_base)))
336 & vgpu_vreg(vgpu,
337 regbase_to_ier(i915_mmio_reg_offset(info->reg_base)));
338
339 if (!info->has_upstream_irq)
340 return;
341
342 for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
343 if (info->group != map->down_irq_group)
344 continue;
345
346 if (!up_irq_info)
347 up_irq_info = irq->info[map->up_irq_group];
348 else
349 drm_WARN_ON(&i915->drm, up_irq_info !=
350 irq->info[map->up_irq_group]);
351
352 bit = map->up_irq_bit;
353
354 if (val & map->down_irq_bitmask)
355 set_bits |= (1 << bit);
356 else
357 clear_bits |= (1 << bit);
358 }
359
360 if (drm_WARN_ON(&i915->drm, !up_irq_info))
361 return;
362
363 if (up_irq_info->group == INTEL_GVT_IRQ_INFO_MASTER) {
364 u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base);
365
366 vgpu_vreg(vgpu, isr) &= ~clear_bits;
367 vgpu_vreg(vgpu, isr) |= set_bits;
368 } else {
369 u32 iir = regbase_to_iir(
370 i915_mmio_reg_offset(up_irq_info->reg_base));
371 u32 imr = regbase_to_imr(
372 i915_mmio_reg_offset(up_irq_info->reg_base));
373
374 vgpu_vreg(vgpu, iir) |= (set_bits & ~vgpu_vreg(vgpu, imr));
375 }
376
377 if (up_irq_info->has_upstream_irq)
378 update_upstream_irq(vgpu, up_irq_info);
379 }
380
init_irq_map(struct intel_gvt_irq * irq)381 static void init_irq_map(struct intel_gvt_irq *irq)
382 {
383 struct intel_gvt_irq_map *map;
384 struct intel_gvt_irq_info *up_info, *down_info;
385 int up_bit;
386
387 for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
388 up_info = irq->info[map->up_irq_group];
389 up_bit = map->up_irq_bit;
390 down_info = irq->info[map->down_irq_group];
391
392 set_bit(up_bit, up_info->downstream_irq_bitmap);
393 down_info->has_upstream_irq = true;
394
395 gvt_dbg_irq("[up] grp %d bit %d -> [down] grp %d bitmask %x\n",
396 up_info->group, up_bit,
397 down_info->group, map->down_irq_bitmask);
398 }
399 }
400
401 /* =======================vEvent injection===================== */
402
403 #define MSI_CAP_CONTROL(offset) (offset + 2)
404 #define MSI_CAP_ADDRESS(offset) (offset + 4)
405 #define MSI_CAP_DATA(offset) (offset + 8)
406 #define MSI_CAP_EN 0x1
407
inject_virtual_interrupt(struct intel_vgpu * vgpu)408 static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
409 {
410 unsigned long offset = vgpu->gvt->device_info.msi_cap_offset;
411 u16 control, data;
412 u32 addr;
413
414 control = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_CONTROL(offset));
415 addr = *(u32 *)(vgpu_cfg_space(vgpu) + MSI_CAP_ADDRESS(offset));
416 data = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_DATA(offset));
417
418 /* Do not generate MSI if MSIEN is disabled */
419 if (!(control & MSI_CAP_EN))
420 return 0;
421
422 if (WARN(control & GENMASK(15, 1), "only support one MSI format\n"))
423 return -EINVAL;
424
425 trace_inject_msi(vgpu->id, addr, data);
426
427 /*
428 * When guest is powered off, msi_trigger is set to NULL, but vgpu's
429 * config and mmio register isn't restored to default during guest
430 * poweroff. If this vgpu is still used in next vm, this vgpu's pipe
431 * may be enabled, then once this vgpu is active, it will get inject
432 * vblank interrupt request. But msi_trigger is null until msi is
433 * enabled by guest. so if msi_trigger is null, success is still
434 * returned and don't inject interrupt into guest.
435 */
436 if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
437 return -ESRCH;
438 if (vgpu->msi_trigger && eventfd_signal(vgpu->msi_trigger, 1) != 1)
439 return -EFAULT;
440 return 0;
441 }
442
propagate_event(struct intel_gvt_irq * irq,enum intel_gvt_event_type event,struct intel_vgpu * vgpu)443 static void propagate_event(struct intel_gvt_irq *irq,
444 enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
445 {
446 struct intel_gvt_irq_info *info;
447 unsigned int reg_base;
448 int bit;
449
450 info = get_irq_info(irq, event);
451 if (WARN_ON(!info))
452 return;
453
454 reg_base = i915_mmio_reg_offset(info->reg_base);
455 bit = irq->events[event].bit;
456
457 if (!test_bit(bit, (void *)&vgpu_vreg(vgpu,
458 regbase_to_imr(reg_base)))) {
459 trace_propagate_event(vgpu->id, irq_name[event], bit);
460 set_bit(bit, (void *)&vgpu_vreg(vgpu,
461 regbase_to_iir(reg_base)));
462 }
463 }
464
465 /* =======================vEvent Handlers===================== */
handle_default_event_virt(struct intel_gvt_irq * irq,enum intel_gvt_event_type event,struct intel_vgpu * vgpu)466 static void handle_default_event_virt(struct intel_gvt_irq *irq,
467 enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
468 {
469 if (!vgpu->irq.irq_warn_once[event]) {
470 gvt_dbg_core("vgpu%d: IRQ receive event %d (%s)\n",
471 vgpu->id, event, irq_name[event]);
472 vgpu->irq.irq_warn_once[event] = true;
473 }
474 propagate_event(irq, event, vgpu);
475 }
476
477 /* =====================GEN specific logic======================= */
478 /* GEN8 interrupt routines. */
479
480 #define DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(regname, regbase) \
481 static struct intel_gvt_irq_info gen8_##regname##_info = { \
482 .name = #regname"-IRQ", \
483 .reg_base = (regbase), \
484 .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] = \
485 INTEL_GVT_EVENT_RESERVED}, \
486 }
487
488 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt0, GEN8_GT_ISR(0));
489 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt1, GEN8_GT_ISR(1));
490 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt2, GEN8_GT_ISR(2));
491 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt3, GEN8_GT_ISR(3));
492 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_a, GEN8_DE_PIPE_ISR(PIPE_A));
493 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_b, GEN8_DE_PIPE_ISR(PIPE_B));
494 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_c, GEN8_DE_PIPE_ISR(PIPE_C));
495 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_port, GEN8_DE_PORT_ISR);
496 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_misc, GEN8_DE_MISC_ISR);
497 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(pcu, GEN8_PCU_ISR);
498 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(master, GEN8_MASTER_IRQ);
499
500 static struct intel_gvt_irq_info gvt_base_pch_info = {
501 .name = "PCH-IRQ",
502 .reg_base = SDEISR,
503 .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] =
504 INTEL_GVT_EVENT_RESERVED},
505 };
506
gen8_check_pending_irq(struct intel_vgpu * vgpu)507 static void gen8_check_pending_irq(struct intel_vgpu *vgpu)
508 {
509 struct intel_gvt_irq *irq = &vgpu->gvt->irq;
510 int i;
511
512 if (!(vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ)) &
513 GEN8_MASTER_IRQ_CONTROL))
514 return;
515
516 for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
517 struct intel_gvt_irq_info *info = irq->info[i];
518 u32 reg_base;
519
520 if (!info->has_upstream_irq)
521 continue;
522
523 reg_base = i915_mmio_reg_offset(info->reg_base);
524 if ((vgpu_vreg(vgpu, regbase_to_iir(reg_base))
525 & vgpu_vreg(vgpu, regbase_to_ier(reg_base))))
526 update_upstream_irq(vgpu, info);
527 }
528
529 if (vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ))
530 & ~GEN8_MASTER_IRQ_CONTROL)
531 inject_virtual_interrupt(vgpu);
532 }
533
gen8_init_irq(struct intel_gvt_irq * irq)534 static void gen8_init_irq(
535 struct intel_gvt_irq *irq)
536 {
537 struct intel_gvt *gvt = irq_to_gvt(irq);
538
539 #define SET_BIT_INFO(s, b, e, i) \
540 do { \
541 s->events[e].bit = b; \
542 s->events[e].info = s->info[i]; \
543 s->info[i]->bit_to_event[b] = e;\
544 } while (0)
545
546 #define SET_IRQ_GROUP(s, g, i) \
547 do { \
548 s->info[g] = i; \
549 (i)->group = g; \
550 set_bit(g, s->irq_info_bitmap); \
551 } while (0)
552
553 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_MASTER, &gen8_master_info);
554 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT0, &gen8_gt0_info);
555 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT1, &gen8_gt1_info);
556 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT2, &gen8_gt2_info);
557 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT3, &gen8_gt3_info);
558 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_A, &gen8_de_pipe_a_info);
559 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_B, &gen8_de_pipe_b_info);
560 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_C, &gen8_de_pipe_c_info);
561 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PORT, &gen8_de_port_info);
562 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_MISC, &gen8_de_misc_info);
563 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCU, &gen8_pcu_info);
564 SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCH, &gvt_base_pch_info);
565
566 /* GEN8 level 2 interrupts. */
567
568 /* GEN8 interrupt GT0 events */
569 SET_BIT_INFO(irq, 0, RCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
570 SET_BIT_INFO(irq, 4, RCS_PIPE_CONTROL, INTEL_GVT_IRQ_INFO_GT0);
571 SET_BIT_INFO(irq, 8, RCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
572
573 SET_BIT_INFO(irq, 16, BCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
574 SET_BIT_INFO(irq, 20, BCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT0);
575 SET_BIT_INFO(irq, 24, BCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
576
577 /* GEN8 interrupt GT1 events */
578 SET_BIT_INFO(irq, 0, VCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT1);
579 SET_BIT_INFO(irq, 4, VCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT1);
580 SET_BIT_INFO(irq, 8, VCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT1);
581
582 if (HAS_ENGINE(gvt->gt, VCS1)) {
583 SET_BIT_INFO(irq, 16, VCS2_MI_USER_INTERRUPT,
584 INTEL_GVT_IRQ_INFO_GT1);
585 SET_BIT_INFO(irq, 20, VCS2_MI_FLUSH_DW,
586 INTEL_GVT_IRQ_INFO_GT1);
587 SET_BIT_INFO(irq, 24, VCS2_AS_CONTEXT_SWITCH,
588 INTEL_GVT_IRQ_INFO_GT1);
589 }
590
591 /* GEN8 interrupt GT3 events */
592 SET_BIT_INFO(irq, 0, VECS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT3);
593 SET_BIT_INFO(irq, 4, VECS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT3);
594 SET_BIT_INFO(irq, 8, VECS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT3);
595
596 SET_BIT_INFO(irq, 0, PIPE_A_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
597 SET_BIT_INFO(irq, 0, PIPE_B_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
598 SET_BIT_INFO(irq, 0, PIPE_C_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
599
600 /* GEN8 interrupt DE PORT events */
601 SET_BIT_INFO(irq, 0, AUX_CHANNEL_A, INTEL_GVT_IRQ_INFO_DE_PORT);
602 SET_BIT_INFO(irq, 3, DP_A_HOTPLUG, INTEL_GVT_IRQ_INFO_DE_PORT);
603
604 /* GEN8 interrupt DE MISC events */
605 SET_BIT_INFO(irq, 0, GSE, INTEL_GVT_IRQ_INFO_DE_MISC);
606
607 /* PCH events */
608 SET_BIT_INFO(irq, 17, GMBUS, INTEL_GVT_IRQ_INFO_PCH);
609 SET_BIT_INFO(irq, 19, CRT_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
610 SET_BIT_INFO(irq, 21, DP_B_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
611 SET_BIT_INFO(irq, 22, DP_C_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
612 SET_BIT_INFO(irq, 23, DP_D_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
613
614 if (IS_BROADWELL(gvt->gt->i915)) {
615 SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_PCH);
616 SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_PCH);
617 SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_PCH);
618
619 SET_BIT_INFO(irq, 4, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
620 SET_BIT_INFO(irq, 5, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
621
622 SET_BIT_INFO(irq, 4, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
623 SET_BIT_INFO(irq, 5, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
624
625 SET_BIT_INFO(irq, 4, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
626 SET_BIT_INFO(irq, 5, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
627 } else if (GRAPHICS_VER(gvt->gt->i915) >= 9) {
628 SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_DE_PORT);
629 SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_DE_PORT);
630 SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_DE_PORT);
631
632 SET_BIT_INFO(irq, 3, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
633 SET_BIT_INFO(irq, 3, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
634 SET_BIT_INFO(irq, 3, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
635
636 SET_BIT_INFO(irq, 4, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
637 SET_BIT_INFO(irq, 4, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
638 SET_BIT_INFO(irq, 4, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
639 }
640
641 /* GEN8 interrupt PCU events */
642 SET_BIT_INFO(irq, 24, PCU_THERMAL, INTEL_GVT_IRQ_INFO_PCU);
643 SET_BIT_INFO(irq, 25, PCU_PCODE2DRIVER_MAILBOX, INTEL_GVT_IRQ_INFO_PCU);
644 }
645
646 static const struct intel_gvt_irq_ops gen8_irq_ops = {
647 .init_irq = gen8_init_irq,
648 .check_pending_irq = gen8_check_pending_irq,
649 };
650
651 /**
652 * intel_vgpu_trigger_virtual_event - Trigger a virtual event for a vGPU
653 * @vgpu: a vGPU
654 * @event: interrupt event
655 *
656 * This function is used to trigger a virtual interrupt event for vGPU.
657 * The caller provides the event to be triggered, the framework itself
658 * will emulate the IRQ register bit change.
659 *
660 */
intel_vgpu_trigger_virtual_event(struct intel_vgpu * vgpu,enum intel_gvt_event_type event)661 void intel_vgpu_trigger_virtual_event(struct intel_vgpu *vgpu,
662 enum intel_gvt_event_type event)
663 {
664 struct drm_i915_private *i915 = vgpu->gvt->gt->i915;
665 struct intel_gvt *gvt = vgpu->gvt;
666 struct intel_gvt_irq *irq = &gvt->irq;
667 gvt_event_virt_handler_t handler;
668 const struct intel_gvt_irq_ops *ops = gvt->irq.ops;
669
670 handler = get_event_virt_handler(irq, event);
671 drm_WARN_ON(&i915->drm, !handler);
672
673 handler(irq, event, vgpu);
674
675 ops->check_pending_irq(vgpu);
676 }
677
init_events(struct intel_gvt_irq * irq)678 static void init_events(
679 struct intel_gvt_irq *irq)
680 {
681 int i;
682
683 for (i = 0; i < INTEL_GVT_EVENT_MAX; i++) {
684 irq->events[i].info = NULL;
685 irq->events[i].v_handler = handle_default_event_virt;
686 }
687 }
688
689 /**
690 * intel_gvt_init_irq - initialize GVT-g IRQ emulation subsystem
691 * @gvt: a GVT device
692 *
693 * This function is called at driver loading stage, to initialize the GVT-g IRQ
694 * emulation subsystem.
695 *
696 * Returns:
697 * Zero on success, negative error code if failed.
698 */
intel_gvt_init_irq(struct intel_gvt * gvt)699 int intel_gvt_init_irq(struct intel_gvt *gvt)
700 {
701 struct intel_gvt_irq *irq = &gvt->irq;
702
703 gvt_dbg_core("init irq framework\n");
704
705 irq->ops = &gen8_irq_ops;
706 irq->irq_map = gen8_irq_map;
707
708 /* common event initialization */
709 init_events(irq);
710
711 /* gen specific initialization */
712 irq->ops->init_irq(irq);
713
714 init_irq_map(irq);
715
716 return 0;
717 }
718