drivers/gpu/drm/amd/amdgpu/mxgpu_ai.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 "vega10/soc15ip.h"
  26 #include "vega10/NBIO/nbio_6_1_offset.h"
  27 #include "vega10/NBIO/nbio_6_1_sh_mask.h"
  28 #include "vega10/GC/gc_9_0_offset.h"
  29 #include "vega10/GC/gc_9_0_sh_mask.h"
  30 #include "soc15.h"
  31 #include "vega10_ih.h"
  32 #include "soc15_common.h"
  33 #include "mxgpu_ai.h"
  34
  35 static void xgpu_ai_mailbox_send_ack(struct amdgpu_device *adev)
  36 {
  37         u32 reg;
  38         int timeout = AI_MAILBOX_TIMEDOUT;
  39         u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_VALID);
  40
  41         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  42                                              mmBIF_BX_PF0_MAILBOX_CONTROL));
  43         reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_ACK, 1);
  44         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  45                                        mmBIF_BX_PF0_MAILBOX_CONTROL), reg);
  46
  47         /*Wait for RCV_MSG_VALID to be 0*/
  48         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  49                                              mmBIF_BX_PF0_MAILBOX_CONTROL));
  50         while (reg & mask) {
  51                 if (timeout <= 0) {
  52                         pr_err("RCV_MSG_VALID is not cleared\n");
  53                         break;
  54                 }
  55                 mdelay(1);
  56                 timeout -=1;
  57
  58                 reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  59                                                      mmBIF_BX_PF0_MAILBOX_CONTROL));
  60         }
  61 }
  62
  63 static void xgpu_ai_mailbox_set_valid(struct amdgpu_device *adev, bool val)
  64 {
  65         u32 reg;
  66
  67         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  68                                              mmBIF_BX_PF0_MAILBOX_CONTROL));
  69         reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_CONTROL,
  70                             TRN_MSG_VALID, val ? 1 : 0);
  71         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_CONTROL),
  72                       reg);
  73 }
  74
  75 static int xgpu_ai_mailbox_rcv_msg(struct amdgpu_device *adev,
  76                                    enum idh_event event)
  77 {
  78         u32 reg;
  79         u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_VALID);
  80
  81         if (event != IDH_FLR_NOTIFICATION_CMPL) {
  82                 reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  83                                                      mmBIF_BX_PF0_MAILBOX_CONTROL));
  84                 if (!(reg & mask))
  85                         return -ENOENT;
  86         }
  87
  88         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
  89                                              mmBIF_BX_PF0_MAILBOX_MSGBUF_RCV_DW0));
  90         if (reg != event)
  91                 return -ENOENT;
  92
  93         xgpu_ai_mailbox_send_ack(adev);
  94
  95         return 0;
  96 }
  97
  98 static int xgpu_ai_poll_ack(struct amdgpu_device *adev)
  99 {
 100         int r = 0, timeout = AI_MAILBOX_TIMEDOUT;
 101         u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, TRN_MSG_ACK);
 102         u32 reg;
 103
 104         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
 105                                              mmBIF_BX_PF0_MAILBOX_CONTROL));
 106         while (!(reg & mask)) {
 107                 if (timeout <= 0) {
 108                         pr_err("Doesn't get ack from pf.\n");
 109                         r = -ETIME;
 110                         break;
 111                 }
 112                 mdelay(5);
 113                 timeout -= 5;
 114
 115                 reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
 116                                                      mmBIF_BX_PF0_MAILBOX_CONTROL));
 117         }
 118
 119         return r;
 120 }
 121
 122 static int xgpu_ai_poll_msg(struct amdgpu_device *adev, enum idh_event event)
 123 {
 124         int r = 0, timeout = AI_MAILBOX_TIMEDOUT;
 125
 126         r = xgpu_ai_mailbox_rcv_msg(adev, event);
 127         while (r) {
 128                 if (timeout <= 0) {
 129                         pr_err("Doesn't get msg:%d from pf.\n", event);
 130                         r = -ETIME;
 131                         break;
 132                 }
 133                 mdelay(5);
 134                 timeout -= 5;
 135
 136                 r = xgpu_ai_mailbox_rcv_msg(adev, event);
 137         }
 138
 139         return r;
 140 }
 141
 142 static void xgpu_ai_mailbox_trans_msg (struct amdgpu_device *adev,
 143               enum idh_request req, u32 data1, u32 data2, u32 data3) {
 144         u32 reg;
 145         int r;
 146
 147         reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
 148                                              mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0));
 149         reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0,
 150                             MSGBUF_DATA, req);
 151         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0),
 152                       reg);
 153         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW1),
 154                                 data1);
 155         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW2),
 156                                 data2);
 157         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW3),
 158                                 data3);
 159
 160         xgpu_ai_mailbox_set_valid(adev, true);
 161
 162         /* start to poll ack */
 163         r = xgpu_ai_poll_ack(adev);
 164         if (r)
 165                 pr_err("Doesn't get ack from pf, continue\n");
 166
 167         xgpu_ai_mailbox_set_valid(adev, false);
 168 }
 169
 170 static int xgpu_ai_send_access_requests(struct amdgpu_device *adev,
 171                                         enum idh_request req)
 172 {
 173         int r;
 174
 175         xgpu_ai_mailbox_trans_msg(adev, req, 0, 0, 0);
 176
 177         /* start to check msg if request is idh_req_gpu_init_access */
 178         if (req == IDH_REQ_GPU_INIT_ACCESS ||
 179                 req == IDH_REQ_GPU_FINI_ACCESS ||
 180                 req == IDH_REQ_GPU_RESET_ACCESS) {
 181                 r = xgpu_ai_poll_msg(adev, IDH_READY_TO_ACCESS_GPU);
 182                 if (r) {
 183                         pr_err("Doesn't get READY_TO_ACCESS_GPU from pf, give up\n");
 184                         return r;
 185                 }
 186         }
 187
 188         return 0;
 189 }
 190
 191 static int xgpu_ai_request_reset(struct amdgpu_device *adev)
 192 {
 193         return xgpu_ai_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
 194 }
 195
 196 static int xgpu_ai_request_full_gpu_access(struct amdgpu_device *adev,
 197                                            bool init)
 198 {
 199         enum idh_request req;
 200
 201         req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
 202         return xgpu_ai_send_access_requests(adev, req);
 203 }
 204
 205 static int xgpu_ai_release_full_gpu_access(struct amdgpu_device *adev,
 206                                            bool init)
 207 {
 208         enum idh_request req;
 209         int r = 0;
 210
 211         req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
 212         r = xgpu_ai_send_access_requests(adev, req);
 213
 214         return r;
 215 }
 216
 217 static int xgpu_ai_mailbox_ack_irq(struct amdgpu_device *adev,
 218                                         struct amdgpu_irq_src *source,
 219                                         struct amdgpu_iv_entry *entry)
 220 {
 221         DRM_DEBUG("get ack intr and do nothing.\n");
 222         return 0;
 223 }
 224
 225 static int xgpu_ai_set_mailbox_ack_irq(struct amdgpu_device *adev,
 226                                         struct amdgpu_irq_src *source,
 227                                         unsigned type,
 228                                         enum amdgpu_interrupt_state state)
 229 {
 230         u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_INT_CNTL));
 231
 232         tmp = REG_SET_FIELD(tmp, BIF_BX_PF0_MAILBOX_INT_CNTL, ACK_INT_EN,
 233                                 (state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
 234         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_INT_CNTL), tmp);
 235
 236         return 0;
 237 }
 238
 239 static void xgpu_ai_mailbox_flr_work(struct work_struct *work)
 240 {
 241         struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
 242         struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
 243
 244         /* wait until RCV_MSG become 3 */
 245         if (xgpu_ai_poll_msg(adev, IDH_FLR_NOTIFICATION_CMPL)) {
 246                 pr_err("failed to recieve FLR_CMPL\n");
 247                 return;
 248         }
 249
 250         /* Trigger recovery due to world switch failure */
 251         amdgpu_sriov_gpu_reset(adev, NULL);
 252 }
 253
 254 static int xgpu_ai_set_mailbox_rcv_irq(struct amdgpu_device *adev,
 255                                        struct amdgpu_irq_src *src,
 256                                        unsigned type,
 257                                        enum amdgpu_interrupt_state state)
 258 {
 259         u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_INT_CNTL));
 260
 261         tmp = REG_SET_FIELD(tmp, BIF_BX_PF0_MAILBOX_INT_CNTL, VALID_INT_EN,
 262                             (state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
 263         WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_INT_CNTL), tmp);
 264
 265         return 0;
 266 }
 267
 268 static int xgpu_ai_mailbox_rcv_irq(struct amdgpu_device *adev,
 269                                    struct amdgpu_irq_src *source,
 270                                    struct amdgpu_iv_entry *entry)
 271 {
 272         int r;
 273
 274         /* trigger gpu-reset by hypervisor only if TDR disbaled */
 275         if (amdgpu_lockup_timeout == 0) {
 276                 /* see what event we get */
 277                 r = xgpu_ai_mailbox_rcv_msg(adev, IDH_FLR_NOTIFICATION);
 278
 279                 /* sometimes the interrupt is delayed to inject to VM, so under such case
 280                  * the IDH_FLR_NOTIFICATION is overwritten by VF FLR from GIM side, thus
 281                  * above recieve message could be failed, we should schedule the flr_work
 282                  * anyway
 283                  */
 284                 if (r) {
 285                         DRM_ERROR("FLR_NOTIFICATION is missed\n");
 286                         xgpu_ai_mailbox_send_ack(adev);
 287                 }
 288
 289                 schedule_work(&adev->virt.flr_work);
 290         }
 291
 292         return 0;
 293 }
 294
 295 static const struct amdgpu_irq_src_funcs xgpu_ai_mailbox_ack_irq_funcs = {
 296         .set = xgpu_ai_set_mailbox_ack_irq,
 297         .process = xgpu_ai_mailbox_ack_irq,
 298 };
 299
 300 static const struct amdgpu_irq_src_funcs xgpu_ai_mailbox_rcv_irq_funcs = {
 301         .set = xgpu_ai_set_mailbox_rcv_irq,
 302         .process = xgpu_ai_mailbox_rcv_irq,
 303 };
 304
 305 void xgpu_ai_mailbox_set_irq_funcs(struct amdgpu_device *adev)
 306 {
 307         adev->virt.ack_irq.num_types = 1;
 308         adev->virt.ack_irq.funcs = &xgpu_ai_mailbox_ack_irq_funcs;
 309         adev->virt.rcv_irq.num_types = 1;
 310         adev->virt.rcv_irq.funcs = &xgpu_ai_mailbox_rcv_irq_funcs;
 311 }
 312
 313 int xgpu_ai_mailbox_add_irq_id(struct amdgpu_device *adev)
 314 {
 315         int r;
 316
 317         r = amdgpu_irq_add_id(adev, AMDGPU_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
 318         if (r)
 319                 return r;
 320
 321         r = amdgpu_irq_add_id(adev, AMDGPU_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
 322         if (r) {
 323                 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 324                 return r;
 325         }
 326
 327         return 0;
 328 }
 329
 330 int xgpu_ai_mailbox_get_irq(struct amdgpu_device *adev)
 331 {
 332         int r;
 333
 334         r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
 335         if (r)
 336                 return r;
 337         r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
 338         if (r) {
 339                 amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 340                 return r;
 341         }
 342
 343         INIT_WORK(&adev->virt.flr_work, xgpu_ai_mailbox_flr_work);
 344
 345         return 0;
 346 }
 347
 348 void xgpu_ai_mailbox_put_irq(struct amdgpu_device *adev)
 349 {
 350         amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
 351         amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 352 }
 353
 354 const struct amdgpu_virt_ops xgpu_ai_virt_ops = {
 355         .req_full_gpu   = xgpu_ai_request_full_gpu_access,
 356         .rel_full_gpu   = xgpu_ai_release_full_gpu_access,
 357         .reset_gpu = xgpu_ai_request_reset,
 358         .trans_msg = xgpu_ai_mailbox_trans_msg,
 359 };