drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #include "amdgpu.h"
  25 #include "nbio/nbio_2_3_offset.h"
  26 #include "nbio/nbio_2_3_sh_mask.h"
  27 #include "gc/gc_10_1_0_offset.h"
  28 #include "gc/gc_10_1_0_sh_mask.h"
  29 #include "soc15.h"
  30 #include "navi10_ih.h"
  31 #include "soc15_common.h"
  32 #include "mxgpu_nv.h"
  33
  34 #include "amdgpu_reset.h"
  35
  36 static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
  37 {
  38         WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
  39 }
  40
  41 static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
  42 {
  43         WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
  44 }
  45
  46 /*
  47  * this peek_msg could *only* be called in IRQ routine becuase in IRQ routine
  48  * RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
  49  * by host.
  50  *
  51  * if called no in IRQ routine, this peek_msg cannot guaranteed to return the
  52  * correct value since it doesn't return the RCV_DW0 under the case that
  53  * RCV_MSG_VALID is set by host.
  54  */
  55 static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
  56 {
  57         return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
  58 }
  59
  60
  61 static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
  62                                    enum idh_event event)
  63 {
  64         u32 reg;
  65
  66         reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
  67         if (reg != event)
  68                 return -ENOENT;
  69
  70         xgpu_nv_mailbox_send_ack(adev);
  71
  72         return 0;
  73 }
  74
  75 static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
  76 {
  77         return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
  78 }
  79
  80 static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
  81 {
  82         int timeout  = NV_MAILBOX_POLL_ACK_TIMEDOUT;
  83         u8 reg;
  84
  85         do {
  86                 reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
  87                 if (reg & 2)
  88                         return 0;
  89
  90                 mdelay(5);
  91                 timeout -= 5;
  92         } while (timeout > 1);
  93
  94         pr_err("Doesn't get TRN_MSG_ACK from pf in %d msec\n", NV_MAILBOX_POLL_ACK_TIMEDOUT);
  95
  96         return -ETIME;
  97 }
  98
  99 static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
 100 {
 101         int r;
 102         uint64_t timeout, now;
 103
 104         now = (uint64_t)ktime_to_ms(ktime_get());
 105         timeout = now + NV_MAILBOX_POLL_MSG_TIMEDOUT;
 106
 107         do {
 108                 r = xgpu_nv_mailbox_rcv_msg(adev, event);
 109                 if (!r)
 110                         return 0;
 111
 112                 msleep(10);
 113                 now = (uint64_t)ktime_to_ms(ktime_get());
 114         } while (timeout > now);
 115
 116
 117         return -ETIME;
 118 }
 119
 120 static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
 121               enum idh_request req, u32 data1, u32 data2, u32 data3)
 122 {
 123         int r;
 124         uint8_t trn;
 125
 126         /* IMPORTANT:
 127          * clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
 128          * and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
 129          * which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
 130          * will return immediatly
 131          */
 132         do {
 133                 xgpu_nv_mailbox_set_valid(adev, false);
 134                 trn = xgpu_nv_peek_ack(adev);
 135                 if (trn) {
 136                         pr_err("trn=%x ACK should not assert! wait again !\n", trn);
 137                         msleep(1);
 138                 }
 139         } while (trn);
 140
 141         WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
 142         WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
 143         WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
 144         WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
 145         xgpu_nv_mailbox_set_valid(adev, true);
 146
 147         /* start to poll ack */
 148         r = xgpu_nv_poll_ack(adev);
 149         if (r)
 150                 pr_err("Doesn't get ack from pf, continue\n");
 151
 152         xgpu_nv_mailbox_set_valid(adev, false);
 153 }
 154
 155 static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
 156                                         enum idh_request req)
 157 {
 158         int r, retry = 1;
 159         enum idh_event event = -1;
 160
 161 send_request:
 162         xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);
 163
 164         switch (req) {
 165         case IDH_REQ_GPU_INIT_ACCESS:
 166         case IDH_REQ_GPU_FINI_ACCESS:
 167         case IDH_REQ_GPU_RESET_ACCESS:
 168                 event = IDH_READY_TO_ACCESS_GPU;
 169                 break;
 170         case IDH_REQ_GPU_INIT_DATA:
 171                 event = IDH_REQ_GPU_INIT_DATA_READY;
 172                 break;
 173         default:
 174                 break;
 175         }
 176
 177         if (event != -1) {
 178                 r = xgpu_nv_poll_msg(adev, event);
 179                 if (r) {
 180                         if (retry++ < 2)
 181                                 goto send_request;
 182
 183                         if (req != IDH_REQ_GPU_INIT_DATA) {
 184                                 pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
 185                                 return r;
 186                         }
 187                         else /* host doesn't support REQ_GPU_INIT_DATA handshake */
 188                                 adev->virt.req_init_data_ver = 0;
 189                 } else {
 190                         if (req == IDH_REQ_GPU_INIT_DATA)
 191                         {
 192                                 adev->virt.req_init_data_ver =
 193                                         RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);
 194
 195                                 /* assume V1 in case host doesn't set version number */
 196                                 if (adev->virt.req_init_data_ver < 1)
 197                                         adev->virt.req_init_data_ver = 1;
 198                         }
 199                 }
 200
 201                 /* Retrieve checksum from mailbox2 */
 202                 if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
 203                         adev->virt.fw_reserve.checksum_key =
 204                                 RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
 205                 }
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int xgpu_nv_request_reset(struct amdgpu_device *adev)
 212 {
 213         int ret, i = 0;
 214
 215         while (i < NV_MAILBOX_POLL_MSG_REP_MAX) {
 216                 ret = xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
 217                 if (!ret)
 218                         break;
 219                 i++;
 220         }
 221
 222         return ret;
 223 }
 224
 225 static int xgpu_nv_request_full_gpu_access(struct amdgpu_device *adev,
 226                                            bool init)
 227 {
 228         enum idh_request req;
 229
 230         req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
 231         return xgpu_nv_send_access_requests(adev, req);
 232 }
 233
 234 static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
 235                                            bool init)
 236 {
 237         enum idh_request req;
 238         int r = 0;
 239
 240         req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
 241         r = xgpu_nv_send_access_requests(adev, req);
 242
 243         return r;
 244 }
 245
 246 static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
 247 {
 248         return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
 249 }
 250
 251 static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
 252                                         struct amdgpu_irq_src *source,
 253                                         struct amdgpu_iv_entry *entry)
 254 {
 255         DRM_DEBUG("get ack intr and do nothing.\n");
 256         return 0;
 257 }
 258
 259 static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
 260                                         struct amdgpu_irq_src *source,
 261                                         unsigned type,
 262                                         enum amdgpu_interrupt_state state)
 263 {
 264         u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
 265
 266         if (state == AMDGPU_IRQ_STATE_ENABLE)
 267                 tmp |= 2;
 268         else
 269                 tmp &= ~2;
 270
 271         WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
 272
 273         return 0;
 274 }
 275
 276 static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
 277 {
 278         struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
 279         struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
 280         int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
 281
 282         /* block amdgpu_gpu_recover till msg FLR COMPLETE received,
 283          * otherwise the mailbox msg will be ruined/reseted by
 284          * the VF FLR.
 285          */
 286         if (atomic_cmpxchg(&adev->reset_domain->in_gpu_reset, 0, 1) != 0)
 287                 return;
 288
 289         down_write(&adev->reset_domain->sem);
 290
 291         amdgpu_virt_fini_data_exchange(adev);
 292
 293         xgpu_nv_mailbox_trans_msg(adev, IDH_READY_TO_RESET, 0, 0, 0);
 294
 295         do {
 296                 if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
 297                         goto flr_done;
 298
 299                 msleep(10);
 300                 timeout -= 10;
 301         } while (timeout > 1);
 302
 303 flr_done:
 304         atomic_set(&adev->reset_domain->in_gpu_reset, 0);
 305         up_write(&adev->reset_domain->sem);
 306
 307         /* Trigger recovery for world switch failure if no TDR */
 308         if (amdgpu_device_should_recover_gpu(adev)
 309                 && (!amdgpu_device_has_job_running(adev) ||
 310                 adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT ||
 311                 adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
 312                 adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
 313                 adev->video_timeout == MAX_SCHEDULE_TIMEOUT)) {
 314                 struct amdgpu_reset_context reset_context;
 315                 memset(&reset_context, 0, sizeof(reset_context));
 316
 317                 reset_context.method = AMD_RESET_METHOD_NONE;
 318                 reset_context.reset_req_dev = adev;
 319                 clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);
 320                 clear_bit(AMDGPU_SKIP_MODE2_RESET, &reset_context.flags);
 321
 322                 amdgpu_device_gpu_recover(adev, NULL, &reset_context);
 323         }
 324 }
 325
 326 static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
 327                                        struct amdgpu_irq_src *src,
 328                                        unsigned type,
 329                                        enum amdgpu_interrupt_state state)
 330 {
 331         u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);
 332
 333         if (state == AMDGPU_IRQ_STATE_ENABLE)
 334                 tmp |= 1;
 335         else
 336                 tmp &= ~1;
 337
 338         WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);
 339
 340         return 0;
 341 }
 342
 343 static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
 344                                    struct amdgpu_irq_src *source,
 345                                    struct amdgpu_iv_entry *entry)
 346 {
 347         enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);
 348
 349         switch (event) {
 350         case IDH_FLR_NOTIFICATION:
 351                 if (amdgpu_sriov_runtime(adev) && !amdgpu_in_reset(adev))
 352                         WARN_ONCE(!amdgpu_reset_domain_schedule(adev->reset_domain,
 353                                    &adev->virt.flr_work),
 354                                   "Failed to queue work! at %s",
 355                                   __func__);
 356                 break;
 357                 /* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
 358                  * it byfar since that polling thread will handle it,
 359                  * other msg like flr complete is not handled here.
 360                  */
 361         case IDH_CLR_MSG_BUF:
 362         case IDH_FLR_NOTIFICATION_CMPL:
 363         case IDH_READY_TO_ACCESS_GPU:
 364         default:
 365                 break;
 366         }
 367
 368         return 0;
 369 }
 370
 371 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
 372         .set = xgpu_nv_set_mailbox_ack_irq,
 373         .process = xgpu_nv_mailbox_ack_irq,
 374 };
 375
 376 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
 377         .set = xgpu_nv_set_mailbox_rcv_irq,
 378         .process = xgpu_nv_mailbox_rcv_irq,
 379 };
 380
 381 void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
 382 {
 383         adev->virt.ack_irq.num_types = 1;
 384         adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
 385         adev->virt.rcv_irq.num_types = 1;
 386         adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
 387 }
 388
 389 int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
 390 {
 391         int r;
 392
 393         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
 394         if (r)
 395                 return r;
 396
 397         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
 398         if (r) {
 399                 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 400                 return r;
 401         }
 402
 403         return 0;
 404 }
 405
 406 int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
 407 {
 408         int r;
 409
 410         r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
 411         if (r)
 412                 return r;
 413         r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
 414         if (r) {
 415                 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 416                 return r;
 417         }
 418
 419         INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);
 420
 421         return 0;
 422 }
 423
 424 void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
 425 {
 426         amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
 427         amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 428 }
 429
 430 const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
 431         .req_full_gpu   = xgpu_nv_request_full_gpu_access,
 432         .rel_full_gpu   = xgpu_nv_release_full_gpu_access,
 433         .req_init_data  = xgpu_nv_request_init_data,
 434         .reset_gpu = xgpu_nv_request_reset,
 435         .wait_reset = NULL,
 436         .trans_msg = xgpu_nv_mailbox_trans_msg,
 437 };