drivers/gpu/drm/i915/gvt/interrupt.c

   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 "i915_drv.h"
  33 #include "gvt.h"
  34 #include "trace.h"
  35
  36 /* common offset among interrupt control registers */
  37 #define regbase_to_isr(base)    (base)
  38 #define regbase_to_imr(base)    (base + 0x4)
  39 #define regbase_to_iir(base)    (base + 0x8)
  40 #define regbase_to_ier(base)    (base + 0xC)
  41
  42 #define iir_to_regbase(iir)    (iir - 0x8)
  43 #define ier_to_regbase(ier)    (ier - 0xC)
  44
  45 #define get_event_virt_handler(irq, e)  (irq->events[e].v_handler)
  46 #define get_irq_info(irq, e)            (irq->events[e].info)
  47
  48 #define irq_to_gvt(irq) \
  49         container_of(irq, struct intel_gvt, irq)
  50
  51 static void update_upstream_irq(struct intel_vgpu *vgpu,
  52                 struct intel_gvt_irq_info *info);
  53
  54 static const char * const irq_name[INTEL_GVT_EVENT_MAX] = {
  55         [RCS_MI_USER_INTERRUPT] = "Render CS MI USER INTERRUPT",
  56         [RCS_DEBUG] = "Render EU debug from SVG",
  57         [RCS_MMIO_SYNC_FLUSH] = "Render MMIO sync flush status",
  58         [RCS_CMD_STREAMER_ERR] = "Render CS error interrupt",
  59         [RCS_PIPE_CONTROL] = "Render PIPE CONTROL notify",
  60         [RCS_WATCHDOG_EXCEEDED] = "Render CS Watchdog counter exceeded",
  61         [RCS_PAGE_DIRECTORY_FAULT] = "Render page directory faults",
  62         [RCS_AS_CONTEXT_SWITCH] = "Render AS Context Switch Interrupt",
  63
  64         [VCS_MI_USER_INTERRUPT] = "Video CS MI USER INTERRUPT",
  65         [VCS_MMIO_SYNC_FLUSH] = "Video MMIO sync flush status",
  66         [VCS_CMD_STREAMER_ERR] = "Video CS error interrupt",
  67         [VCS_MI_FLUSH_DW] = "Video MI FLUSH DW notify",
  68         [VCS_WATCHDOG_EXCEEDED] = "Video CS Watchdog counter exceeded",
  69         [VCS_PAGE_DIRECTORY_FAULT] = "Video page directory faults",
  70         [VCS_AS_CONTEXT_SWITCH] = "Video AS Context Switch Interrupt",
  71         [VCS2_MI_USER_INTERRUPT] = "VCS2 Video CS MI USER INTERRUPT",
  72         [VCS2_MI_FLUSH_DW] = "VCS2 Video MI FLUSH DW notify",
  73         [VCS2_AS_CONTEXT_SWITCH] = "VCS2 Context Switch Interrupt",
  74
  75         [BCS_MI_USER_INTERRUPT] = "Blitter CS MI USER INTERRUPT",
  76         [BCS_MMIO_SYNC_FLUSH] = "Billter MMIO sync flush status",
  77         [BCS_CMD_STREAMER_ERR] = "Blitter CS error interrupt",
  78         [BCS_MI_FLUSH_DW] = "Blitter MI FLUSH DW notify",
  79         [BCS_PAGE_DIRECTORY_FAULT] = "Blitter page directory faults",
  80         [BCS_AS_CONTEXT_SWITCH] = "Blitter AS Context Switch Interrupt",
  81
  82         [VECS_MI_FLUSH_DW] = "Video Enhanced Streamer MI FLUSH DW notify",
  83         [VECS_AS_CONTEXT_SWITCH] = "VECS Context Switch Interrupt",
  84
  85         [PIPE_A_FIFO_UNDERRUN] = "Pipe A FIFO underrun",
  86         [PIPE_A_CRC_ERR] = "Pipe A CRC error",
  87         [PIPE_A_CRC_DONE] = "Pipe A CRC done",
  88         [PIPE_A_VSYNC] = "Pipe A vsync",
  89         [PIPE_A_LINE_COMPARE] = "Pipe A line compare",
  90         [PIPE_A_ODD_FIELD] = "Pipe A odd field",
  91         [PIPE_A_EVEN_FIELD] = "Pipe A even field",
  92         [PIPE_A_VBLANK] = "Pipe A vblank",
  93         [PIPE_B_FIFO_UNDERRUN] = "Pipe B FIFO underrun",
  94         [PIPE_B_CRC_ERR] = "Pipe B CRC error",
  95         [PIPE_B_CRC_DONE] = "Pipe B CRC done",
  96         [PIPE_B_VSYNC] = "Pipe B vsync",
  97         [PIPE_B_LINE_COMPARE] = "Pipe B line compare",
  98         [PIPE_B_ODD_FIELD] = "Pipe B odd field",
  99         [PIPE_B_EVEN_FIELD] = "Pipe B even field",
 100         [PIPE_B_VBLANK] = "Pipe B vblank",
 101         [PIPE_C_VBLANK] = "Pipe C vblank",
 102         [DPST_PHASE_IN] = "DPST phase in event",
 103         [DPST_HISTOGRAM] = "DPST histogram event",
 104         [GSE] = "GSE",
 105         [DP_A_HOTPLUG] = "DP A Hotplug",
 106         [AUX_CHANNEL_A] = "AUX Channel A",
 107         [PERF_COUNTER] = "Performance counter",
 108         [POISON] = "Poison",
 109         [GTT_FAULT] = "GTT fault",
 110         [PRIMARY_A_FLIP_DONE] = "Primary Plane A flip done",
 111         [PRIMARY_B_FLIP_DONE] = "Primary Plane B flip done",
 112         [PRIMARY_C_FLIP_DONE] = "Primary Plane C flip done",
 113         [SPRITE_A_FLIP_DONE] = "Sprite Plane A flip done",
 114         [SPRITE_B_FLIP_DONE] = "Sprite Plane B flip done",
 115         [SPRITE_C_FLIP_DONE] = "Sprite Plane C flip done",
 116
 117         [PCU_THERMAL] = "PCU Thermal Event",
 118         [PCU_PCODE2DRIVER_MAILBOX] = "PCU pcode2driver mailbox event",
 119
 120         [FDI_RX_INTERRUPTS_TRANSCODER_A] = "FDI RX Interrupts Combined A",
 121         [AUDIO_CP_CHANGE_TRANSCODER_A] = "Audio CP Change Transcoder A",
 122         [AUDIO_CP_REQUEST_TRANSCODER_A] = "Audio CP Request Transcoder A",
 123         [FDI_RX_INTERRUPTS_TRANSCODER_B] = "FDI RX Interrupts Combined B",
 124         [AUDIO_CP_CHANGE_TRANSCODER_B] = "Audio CP Change Transcoder B",
 125         [AUDIO_CP_REQUEST_TRANSCODER_B] = "Audio CP Request Transcoder B",
 126         [FDI_RX_INTERRUPTS_TRANSCODER_C] = "FDI RX Interrupts Combined C",
 127         [AUDIO_CP_CHANGE_TRANSCODER_C] = "Audio CP Change Transcoder C",
 128         [AUDIO_CP_REQUEST_TRANSCODER_C] = "Audio CP Request Transcoder C",
 129         [ERR_AND_DBG] = "South Error and Debug Interupts Combined",
 130         [GMBUS] = "Gmbus",
 131         [SDVO_B_HOTPLUG] = "SDVO B hotplug",
 132         [CRT_HOTPLUG] = "CRT Hotplug",
 133         [DP_B_HOTPLUG] = "DisplayPort/HDMI/DVI B Hotplug",
 134         [DP_C_HOTPLUG] = "DisplayPort/HDMI/DVI C Hotplug",
 135         [DP_D_HOTPLUG] = "DisplayPort/HDMI/DVI D Hotplug",
 136         [AUX_CHANNEL_B] = "AUX Channel B",
 137         [AUX_CHANNEL_C] = "AUX Channel C",
 138         [AUX_CHANNEL_D] = "AUX Channel D",
 139         [AUDIO_POWER_STATE_CHANGE_B] = "Audio Power State change Port B",
 140         [AUDIO_POWER_STATE_CHANGE_C] = "Audio Power State change Port C",
 141         [AUDIO_POWER_STATE_CHANGE_D] = "Audio Power State change Port D",
 142
 143         [INTEL_GVT_EVENT_RESERVED] = "RESERVED EVENTS!!!",
 144 };
 145
 146 static inline struct intel_gvt_irq_info *regbase_to_irq_info(
 147                 struct intel_gvt *gvt,
 148                 unsigned int reg)
 149 {
 150         struct intel_gvt_irq *irq = &gvt->irq;
 151         int i;
 152
 153         for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
 154                 if (i915_mmio_reg_offset(irq->info[i]->reg_base) == reg)
 155                         return irq->info[i];
 156         }
 157
 158         return NULL;
 159 }
 160
 161 /**
 162  * intel_vgpu_reg_imr_handler - Generic IMR register emulation write handler
 163  * @vgpu: a vGPU
 164  * @reg: register offset written by guest
 165  * @p_data: register data written by guest
 166  * @bytes: register data length
 167  *
 168  * This function is used to emulate the generic IMR register bit change
 169  * behavior.
 170  *
 171  * Returns:
 172  * Zero on success, negative error code if failed.
 173  *
 174  */
 175 int intel_vgpu_reg_imr_handler(struct intel_vgpu *vgpu,
 176         unsigned int reg, void *p_data, unsigned int bytes)
 177 {
 178         struct intel_gvt *gvt = vgpu->gvt;
 179         struct intel_gvt_irq_ops *ops = gvt->irq.ops;
 180         u32 imr = *(u32 *)p_data;
 181
 182         trace_write_ir(vgpu->id, "IMR", reg, imr, vgpu_vreg(vgpu, reg),
 183                        (vgpu_vreg(vgpu, reg) ^ imr));
 184
 185         vgpu_vreg(vgpu, reg) = imr;
 186
 187         ops->check_pending_irq(vgpu);
 188
 189         return 0;
 190 }
 191
 192 /**
 193  * intel_vgpu_reg_master_irq_handler - master IRQ write emulation handler
 194  * @vgpu: a vGPU
 195  * @reg: register offset written by guest
 196  * @p_data: register data written by guest
 197  * @bytes: register data length
 198  *
 199  * This function is used to emulate the master IRQ register on gen8+.
 200  *
 201  * Returns:
 202  * Zero on success, negative error code if failed.
 203  *
 204  */
 205 int intel_vgpu_reg_master_irq_handler(struct intel_vgpu *vgpu,
 206         unsigned int reg, void *p_data, unsigned int bytes)
 207 {
 208         struct intel_gvt *gvt = vgpu->gvt;
 209         struct intel_gvt_irq_ops *ops = gvt->irq.ops;
 210         u32 ier = *(u32 *)p_data;
 211         u32 virtual_ier = vgpu_vreg(vgpu, reg);
 212
 213         trace_write_ir(vgpu->id, "MASTER_IRQ", reg, ier, virtual_ier,
 214                        (virtual_ier ^ ier));
 215
 216         /*
 217          * GEN8_MASTER_IRQ is a special irq register,
 218          * only bit 31 is allowed to be modified
 219          * and treated as an IER bit.
 220          */
 221         ier &= GEN8_MASTER_IRQ_CONTROL;
 222         virtual_ier &= GEN8_MASTER_IRQ_CONTROL;
 223         vgpu_vreg(vgpu, reg) &= ~GEN8_MASTER_IRQ_CONTROL;
 224         vgpu_vreg(vgpu, reg) |= ier;
 225
 226         ops->check_pending_irq(vgpu);
 227
 228         return 0;
 229 }
 230
 231 /**
 232  * intel_vgpu_reg_ier_handler - Generic IER write emulation handler
 233  * @vgpu: a vGPU
 234  * @reg: register offset written by guest
 235  * @p_data: register data written by guest
 236  * @bytes: register data length
 237  *
 238  * This function is used to emulate the generic IER register behavior.
 239  *
 240  * Returns:
 241  * Zero on success, negative error code if failed.
 242  *
 243  */
 244 int intel_vgpu_reg_ier_handler(struct intel_vgpu *vgpu,
 245         unsigned int reg, void *p_data, unsigned int bytes)
 246 {
 247         struct intel_gvt *gvt = vgpu->gvt;
 248         struct intel_gvt_irq_ops *ops = gvt->irq.ops;
 249         struct intel_gvt_irq_info *info;
 250         u32 ier = *(u32 *)p_data;
 251
 252         trace_write_ir(vgpu->id, "IER", reg, ier, vgpu_vreg(vgpu, reg),
 253                        (vgpu_vreg(vgpu, reg) ^ ier));
 254
 255         vgpu_vreg(vgpu, reg) = ier;
 256
 257         info = regbase_to_irq_info(gvt, ier_to_regbase(reg));
 258         if (WARN_ON(!info))
 259                 return -EINVAL;
 260
 261         if (info->has_upstream_irq)
 262                 update_upstream_irq(vgpu, info);
 263
 264         ops->check_pending_irq(vgpu);
 265
 266         return 0;
 267 }
 268
 269 /**
 270  * intel_vgpu_reg_iir_handler - Generic IIR write emulation handler
 271  * @vgpu: a vGPU
 272  * @reg: register offset written by guest
 273  * @p_data: register data written by guest
 274  * @bytes: register data length
 275  *
 276  * This function is used to emulate the generic IIR register behavior.
 277  *
 278  * Returns:
 279  * Zero on success, negative error code if failed.
 280  *
 281  */
 282 int intel_vgpu_reg_iir_handler(struct intel_vgpu *vgpu, unsigned int reg,
 283         void *p_data, unsigned int bytes)
 284 {
 285         struct intel_gvt_irq_info *info = regbase_to_irq_info(vgpu->gvt,
 286                 iir_to_regbase(reg));
 287         u32 iir = *(u32 *)p_data;
 288
 289         trace_write_ir(vgpu->id, "IIR", reg, iir, vgpu_vreg(vgpu, reg),
 290                        (vgpu_vreg(vgpu, reg) ^ iir));
 291
 292         if (WARN_ON(!info))
 293                 return -EINVAL;
 294
 295         vgpu_vreg(vgpu, reg) &= ~iir;
 296
 297         if (info->has_upstream_irq)
 298                 update_upstream_irq(vgpu, info);
 299         return 0;
 300 }
 301
 302 static struct intel_gvt_irq_map gen8_irq_map[] = {
 303         { INTEL_GVT_IRQ_INFO_MASTER, 0, INTEL_GVT_IRQ_INFO_GT0, 0xffff },
 304         { INTEL_GVT_IRQ_INFO_MASTER, 1, INTEL_GVT_IRQ_INFO_GT0, 0xffff0000 },
 305         { INTEL_GVT_IRQ_INFO_MASTER, 2, INTEL_GVT_IRQ_INFO_GT1, 0xffff },
 306         { INTEL_GVT_IRQ_INFO_MASTER, 3, INTEL_GVT_IRQ_INFO_GT1, 0xffff0000 },
 307         { INTEL_GVT_IRQ_INFO_MASTER, 4, INTEL_GVT_IRQ_INFO_GT2, 0xffff },
 308         { INTEL_GVT_IRQ_INFO_MASTER, 6, INTEL_GVT_IRQ_INFO_GT3, 0xffff },
 309         { INTEL_GVT_IRQ_INFO_MASTER, 16, INTEL_GVT_IRQ_INFO_DE_PIPE_A, ~0 },
 310         { INTEL_GVT_IRQ_INFO_MASTER, 17, INTEL_GVT_IRQ_INFO_DE_PIPE_B, ~0 },
 311         { INTEL_GVT_IRQ_INFO_MASTER, 18, INTEL_GVT_IRQ_INFO_DE_PIPE_C, ~0 },
 312         { INTEL_GVT_IRQ_INFO_MASTER, 20, INTEL_GVT_IRQ_INFO_DE_PORT, ~0 },
 313         { INTEL_GVT_IRQ_INFO_MASTER, 22, INTEL_GVT_IRQ_INFO_DE_MISC, ~0 },
 314         { INTEL_GVT_IRQ_INFO_MASTER, 23, INTEL_GVT_IRQ_INFO_PCH, ~0 },
 315         { INTEL_GVT_IRQ_INFO_MASTER, 30, INTEL_GVT_IRQ_INFO_PCU, ~0 },
 316         { -1, -1, ~0 },
 317 };
 318
 319 static void update_upstream_irq(struct intel_vgpu *vgpu,
 320                 struct intel_gvt_irq_info *info)
 321 {
 322         struct intel_gvt_irq *irq = &vgpu->gvt->irq;
 323         struct intel_gvt_irq_map *map = irq->irq_map;
 324         struct intel_gvt_irq_info *up_irq_info = NULL;
 325         u32 set_bits = 0;
 326         u32 clear_bits = 0;
 327         int bit;
 328         u32 val = vgpu_vreg(vgpu,
 329                         regbase_to_iir(i915_mmio_reg_offset(info->reg_base)))
 330                 & vgpu_vreg(vgpu,
 331                         regbase_to_ier(i915_mmio_reg_offset(info->reg_base)));
 332
 333         if (!info->has_upstream_irq)
 334                 return;
 335
 336         for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
 337                 if (info->group != map->down_irq_group)
 338                         continue;
 339
 340                 if (!up_irq_info)
 341                         up_irq_info = irq->info[map->up_irq_group];
 342                 else
 343                         WARN_ON(up_irq_info != irq->info[map->up_irq_group]);
 344
 345                 bit = map->up_irq_bit;
 346
 347                 if (val & map->down_irq_bitmask)
 348                         set_bits |= (1 << bit);
 349                 else
 350                         clear_bits |= (1 << bit);
 351         }
 352
 353         WARN_ON(!up_irq_info);
 354
 355         if (up_irq_info->group == INTEL_GVT_IRQ_INFO_MASTER) {
 356                 u32 isr = i915_mmio_reg_offset(up_irq_info->reg_base);
 357
 358                 vgpu_vreg(vgpu, isr) &= ~clear_bits;
 359                 vgpu_vreg(vgpu, isr) |= set_bits;
 360         } else {
 361                 u32 iir = regbase_to_iir(
 362                         i915_mmio_reg_offset(up_irq_info->reg_base));
 363                 u32 imr = regbase_to_imr(
 364                         i915_mmio_reg_offset(up_irq_info->reg_base));
 365
 366                 vgpu_vreg(vgpu, iir) |= (set_bits & ~vgpu_vreg(vgpu, imr));
 367         }
 368
 369         if (up_irq_info->has_upstream_irq)
 370                 update_upstream_irq(vgpu, up_irq_info);
 371 }
 372
 373 static void init_irq_map(struct intel_gvt_irq *irq)
 374 {
 375         struct intel_gvt_irq_map *map;
 376         struct intel_gvt_irq_info *up_info, *down_info;
 377         int up_bit;
 378
 379         for (map = irq->irq_map; map->up_irq_bit != -1; map++) {
 380                 up_info = irq->info[map->up_irq_group];
 381                 up_bit = map->up_irq_bit;
 382                 down_info = irq->info[map->down_irq_group];
 383
 384                 set_bit(up_bit, up_info->downstream_irq_bitmap);
 385                 down_info->has_upstream_irq = true;
 386
 387                 gvt_dbg_irq("[up] grp %d bit %d -> [down] grp %d bitmask %x\n",
 388                         up_info->group, up_bit,
 389                         down_info->group, map->down_irq_bitmask);
 390         }
 391 }
 392
 393 /* =======================vEvent injection===================== */
 394 static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
 395 {
 396         return intel_gvt_hypervisor_inject_msi(vgpu);
 397 }
 398
 399 static void propagate_event(struct intel_gvt_irq *irq,
 400         enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
 401 {
 402         struct intel_gvt_irq_info *info;
 403         unsigned int reg_base;
 404         int bit;
 405
 406         info = get_irq_info(irq, event);
 407         if (WARN_ON(!info))
 408                 return;
 409
 410         reg_base = i915_mmio_reg_offset(info->reg_base);
 411         bit = irq->events[event].bit;
 412
 413         if (!test_bit(bit, (void *)&vgpu_vreg(vgpu,
 414                                         regbase_to_imr(reg_base)))) {
 415                 trace_propagate_event(vgpu->id, irq_name[event], bit);
 416                 set_bit(bit, (void *)&vgpu_vreg(vgpu,
 417                                         regbase_to_iir(reg_base)));
 418         }
 419 }
 420
 421 /* =======================vEvent Handlers===================== */
 422 static void handle_default_event_virt(struct intel_gvt_irq *irq,
 423         enum intel_gvt_event_type event, struct intel_vgpu *vgpu)
 424 {
 425         if (!vgpu->irq.irq_warn_once[event]) {
 426                 gvt_dbg_core("vgpu%d: IRQ receive event %d (%s)\n",
 427                         vgpu->id, event, irq_name[event]);
 428                 vgpu->irq.irq_warn_once[event] = true;
 429         }
 430         propagate_event(irq, event, vgpu);
 431 }
 432
 433 /* =====================GEN specific logic======================= */
 434 /* GEN8 interrupt routines. */
 435
 436 #define DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(regname, regbase) \
 437 static struct intel_gvt_irq_info gen8_##regname##_info = { \
 438         .name = #regname"-IRQ", \
 439         .reg_base = (regbase), \
 440         .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] = \
 441                 INTEL_GVT_EVENT_RESERVED}, \
 442 }
 443
 444 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt0, GEN8_GT_ISR(0));
 445 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt1, GEN8_GT_ISR(1));
 446 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt2, GEN8_GT_ISR(2));
 447 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(gt3, GEN8_GT_ISR(3));
 448 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_a, GEN8_DE_PIPE_ISR(PIPE_A));
 449 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_b, GEN8_DE_PIPE_ISR(PIPE_B));
 450 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_pipe_c, GEN8_DE_PIPE_ISR(PIPE_C));
 451 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_port, GEN8_DE_PORT_ISR);
 452 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(de_misc, GEN8_DE_MISC_ISR);
 453 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(pcu, GEN8_PCU_ISR);
 454 DEFINE_GVT_GEN8_INTEL_GVT_IRQ_INFO(master, GEN8_MASTER_IRQ);
 455
 456 static struct intel_gvt_irq_info gvt_base_pch_info = {
 457         .name = "PCH-IRQ",
 458         .reg_base = SDEISR,
 459         .bit_to_event = {[0 ... INTEL_GVT_IRQ_BITWIDTH-1] =
 460                 INTEL_GVT_EVENT_RESERVED},
 461 };
 462
 463 static void gen8_check_pending_irq(struct intel_vgpu *vgpu)
 464 {
 465         struct intel_gvt_irq *irq = &vgpu->gvt->irq;
 466         int i;
 467
 468         if (!(vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ)) &
 469                                 GEN8_MASTER_IRQ_CONTROL))
 470                 return;
 471
 472         for_each_set_bit(i, irq->irq_info_bitmap, INTEL_GVT_IRQ_INFO_MAX) {
 473                 struct intel_gvt_irq_info *info = irq->info[i];
 474                 u32 reg_base;
 475
 476                 if (!info->has_upstream_irq)
 477                         continue;
 478
 479                 reg_base = i915_mmio_reg_offset(info->reg_base);
 480                 if ((vgpu_vreg(vgpu, regbase_to_iir(reg_base))
 481                                 & vgpu_vreg(vgpu, regbase_to_ier(reg_base))))
 482                         update_upstream_irq(vgpu, info);
 483         }
 484
 485         if (vgpu_vreg(vgpu, i915_mmio_reg_offset(GEN8_MASTER_IRQ))
 486                         & ~GEN8_MASTER_IRQ_CONTROL)
 487                 inject_virtual_interrupt(vgpu);
 488 }
 489
 490 static void gen8_init_irq(
 491                 struct intel_gvt_irq *irq)
 492 {
 493         struct intel_gvt *gvt = irq_to_gvt(irq);
 494
 495 #define SET_BIT_INFO(s, b, e, i)                \
 496         do {                                    \
 497                 s->events[e].bit = b;           \
 498                 s->events[e].info = s->info[i]; \
 499                 s->info[i]->bit_to_event[b] = e;\
 500         } while (0)
 501
 502 #define SET_IRQ_GROUP(s, g, i) \
 503         do { \
 504                 s->info[g] = i; \
 505                 (i)->group = g; \
 506                 set_bit(g, s->irq_info_bitmap); \
 507         } while (0)
 508
 509         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_MASTER, &gen8_master_info);
 510         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT0, &gen8_gt0_info);
 511         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT1, &gen8_gt1_info);
 512         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT2, &gen8_gt2_info);
 513         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_GT3, &gen8_gt3_info);
 514         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_A, &gen8_de_pipe_a_info);
 515         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_B, &gen8_de_pipe_b_info);
 516         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PIPE_C, &gen8_de_pipe_c_info);
 517         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_PORT, &gen8_de_port_info);
 518         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_DE_MISC, &gen8_de_misc_info);
 519         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCU, &gen8_pcu_info);
 520         SET_IRQ_GROUP(irq, INTEL_GVT_IRQ_INFO_PCH, &gvt_base_pch_info);
 521
 522         /* GEN8 level 2 interrupts. */
 523
 524         /* GEN8 interrupt GT0 events */
 525         SET_BIT_INFO(irq, 0, RCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
 526         SET_BIT_INFO(irq, 4, RCS_PIPE_CONTROL, INTEL_GVT_IRQ_INFO_GT0);
 527         SET_BIT_INFO(irq, 8, RCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
 528
 529         SET_BIT_INFO(irq, 16, BCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT0);
 530         SET_BIT_INFO(irq, 20, BCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT0);
 531         SET_BIT_INFO(irq, 24, BCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT0);
 532
 533         /* GEN8 interrupt GT1 events */
 534         SET_BIT_INFO(irq, 0, VCS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT1);
 535         SET_BIT_INFO(irq, 4, VCS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT1);
 536         SET_BIT_INFO(irq, 8, VCS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT1);
 537
 538         if (HAS_BSD2(gvt->dev_priv)) {
 539                 SET_BIT_INFO(irq, 16, VCS2_MI_USER_INTERRUPT,
 540                         INTEL_GVT_IRQ_INFO_GT1);
 541                 SET_BIT_INFO(irq, 20, VCS2_MI_FLUSH_DW,
 542                         INTEL_GVT_IRQ_INFO_GT1);
 543                 SET_BIT_INFO(irq, 24, VCS2_AS_CONTEXT_SWITCH,
 544                         INTEL_GVT_IRQ_INFO_GT1);
 545         }
 546
 547         /* GEN8 interrupt GT3 events */
 548         SET_BIT_INFO(irq, 0, VECS_MI_USER_INTERRUPT, INTEL_GVT_IRQ_INFO_GT3);
 549         SET_BIT_INFO(irq, 4, VECS_MI_FLUSH_DW, INTEL_GVT_IRQ_INFO_GT3);
 550         SET_BIT_INFO(irq, 8, VECS_AS_CONTEXT_SWITCH, INTEL_GVT_IRQ_INFO_GT3);
 551
 552         SET_BIT_INFO(irq, 0, PIPE_A_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 553         SET_BIT_INFO(irq, 0, PIPE_B_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 554         SET_BIT_INFO(irq, 0, PIPE_C_VBLANK, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 555
 556         /* GEN8 interrupt DE PORT events */
 557         SET_BIT_INFO(irq, 0, AUX_CHANNEL_A, INTEL_GVT_IRQ_INFO_DE_PORT);
 558         SET_BIT_INFO(irq, 3, DP_A_HOTPLUG, INTEL_GVT_IRQ_INFO_DE_PORT);
 559
 560         /* GEN8 interrupt DE MISC events */
 561         SET_BIT_INFO(irq, 0, GSE, INTEL_GVT_IRQ_INFO_DE_MISC);
 562
 563         /* PCH events */
 564         SET_BIT_INFO(irq, 17, GMBUS, INTEL_GVT_IRQ_INFO_PCH);
 565         SET_BIT_INFO(irq, 19, CRT_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
 566         SET_BIT_INFO(irq, 21, DP_B_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
 567         SET_BIT_INFO(irq, 22, DP_C_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
 568         SET_BIT_INFO(irq, 23, DP_D_HOTPLUG, INTEL_GVT_IRQ_INFO_PCH);
 569
 570         if (IS_BROADWELL(gvt->dev_priv)) {
 571                 SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_PCH);
 572                 SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_PCH);
 573                 SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_PCH);
 574
 575                 SET_BIT_INFO(irq, 4, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 576                 SET_BIT_INFO(irq, 5, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 577
 578                 SET_BIT_INFO(irq, 4, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 579                 SET_BIT_INFO(irq, 5, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 580
 581                 SET_BIT_INFO(irq, 4, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 582                 SET_BIT_INFO(irq, 5, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 583         } else if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv)) {
 584                 SET_BIT_INFO(irq, 25, AUX_CHANNEL_B, INTEL_GVT_IRQ_INFO_DE_PORT);
 585                 SET_BIT_INFO(irq, 26, AUX_CHANNEL_C, INTEL_GVT_IRQ_INFO_DE_PORT);
 586                 SET_BIT_INFO(irq, 27, AUX_CHANNEL_D, INTEL_GVT_IRQ_INFO_DE_PORT);
 587
 588                 SET_BIT_INFO(irq, 3, PRIMARY_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 589                 SET_BIT_INFO(irq, 3, PRIMARY_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 590                 SET_BIT_INFO(irq, 3, PRIMARY_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 591
 592                 SET_BIT_INFO(irq, 4, SPRITE_A_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_A);
 593                 SET_BIT_INFO(irq, 4, SPRITE_B_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_B);
 594                 SET_BIT_INFO(irq, 4, SPRITE_C_FLIP_DONE, INTEL_GVT_IRQ_INFO_DE_PIPE_C);
 595         }
 596
 597         /* GEN8 interrupt PCU events */
 598         SET_BIT_INFO(irq, 24, PCU_THERMAL, INTEL_GVT_IRQ_INFO_PCU);
 599         SET_BIT_INFO(irq, 25, PCU_PCODE2DRIVER_MAILBOX, INTEL_GVT_IRQ_INFO_PCU);
 600 }
 601
 602 static struct intel_gvt_irq_ops gen8_irq_ops = {
 603         .init_irq = gen8_init_irq,
 604         .check_pending_irq = gen8_check_pending_irq,
 605 };
 606
 607 /**
 608  * intel_vgpu_trigger_virtual_event - Trigger a virtual event for a vGPU
 609  * @vgpu: a vGPU
 610  * @event: interrupt event
 611  *
 612  * This function is used to trigger a virtual interrupt event for vGPU.
 613  * The caller provides the event to be triggered, the framework itself
 614  * will emulate the IRQ register bit change.
 615  *
 616  */
 617 void intel_vgpu_trigger_virtual_event(struct intel_vgpu *vgpu,
 618         enum intel_gvt_event_type event)
 619 {
 620         struct intel_gvt *gvt = vgpu->gvt;
 621         struct intel_gvt_irq *irq = &gvt->irq;
 622         gvt_event_virt_handler_t handler;
 623         struct intel_gvt_irq_ops *ops = gvt->irq.ops;
 624
 625         handler = get_event_virt_handler(irq, event);
 626         WARN_ON(!handler);
 627
 628         handler(irq, event, vgpu);
 629
 630         ops->check_pending_irq(vgpu);
 631 }
 632
 633 static void init_events(
 634         struct intel_gvt_irq *irq)
 635 {
 636         int i;
 637
 638         for (i = 0; i < INTEL_GVT_EVENT_MAX; i++) {
 639                 irq->events[i].info = NULL;
 640                 irq->events[i].v_handler = handle_default_event_virt;
 641         }
 642 }
 643
 644 static enum hrtimer_restart vblank_timer_fn(struct hrtimer *data)
 645 {
 646         struct intel_gvt_vblank_timer *vblank_timer;
 647         struct intel_gvt_irq *irq;
 648         struct intel_gvt *gvt;
 649
 650         vblank_timer = container_of(data, struct intel_gvt_vblank_timer, timer);
 651         irq = container_of(vblank_timer, struct intel_gvt_irq, vblank_timer);
 652         gvt = container_of(irq, struct intel_gvt, irq);
 653
 654         intel_gvt_request_service(gvt, INTEL_GVT_REQUEST_EMULATE_VBLANK);
 655         hrtimer_add_expires_ns(&vblank_timer->timer, vblank_timer->period);
 656         return HRTIMER_RESTART;
 657 }
 658
 659 /**
 660  * intel_gvt_clean_irq - clean up GVT-g IRQ emulation subsystem
 661  * @gvt: a GVT device
 662  *
 663  * This function is called at driver unloading stage, to clean up GVT-g IRQ
 664  * emulation subsystem.
 665  *
 666  */
 667 void intel_gvt_clean_irq(struct intel_gvt *gvt)
 668 {
 669         struct intel_gvt_irq *irq = &gvt->irq;
 670
 671         hrtimer_cancel(&irq->vblank_timer.timer);
 672 }
 673
 674 #define VBLNAK_TIMER_PERIOD 16000000
 675
 676 /**
 677  * intel_gvt_init_irq - initialize GVT-g IRQ emulation subsystem
 678  * @gvt: a GVT device
 679  *
 680  * This function is called at driver loading stage, to initialize the GVT-g IRQ
 681  * emulation subsystem.
 682  *
 683  * Returns:
 684  * Zero on success, negative error code if failed.
 685  */
 686 int intel_gvt_init_irq(struct intel_gvt *gvt)
 687 {
 688         struct intel_gvt_irq *irq = &gvt->irq;
 689         struct intel_gvt_vblank_timer *vblank_timer = &irq->vblank_timer;
 690
 691         gvt_dbg_core("init irq framework\n");
 692
 693         if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)
 694                 || IS_KABYLAKE(gvt->dev_priv)) {
 695                 irq->ops = &gen8_irq_ops;
 696                 irq->irq_map = gen8_irq_map;
 697         } else {
 698                 WARN_ON(1);
 699                 return -ENODEV;
 700         }
 701
 702         /* common event initialization */
 703         init_events(irq);
 704
 705         /* gen specific initialization */
 706         irq->ops->init_irq(irq);
 707
 708         init_irq_map(irq);
 709
 710         hrtimer_init(&vblank_timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 711         vblank_timer->timer.function = vblank_timer_fn;
 712         vblank_timer->period = VBLNAK_TIMER_PERIOD;
 713
 714         return 0;
 715 }