1 /* 2 * Copyright 2020 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 <linux/pci.h> 25 26 #include "amdgpu.h" 27 #include "amdgpu_ih.h" 28 #include "soc15.h" 29 30 #include "oss/osssys_4_2_0_offset.h" 31 #include "oss/osssys_4_2_0_sh_mask.h" 32 33 #include "soc15_common.h" 34 #include "vega20_ih.h" 35 36 #define MAX_REARM_RETRY 10 37 38 #define mmIH_CHICKEN_ALDEBARAN 0x18d 39 #define mmIH_CHICKEN_ALDEBARAN_BASE_IDX 0 40 41 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN 0x00ea 42 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN_BASE_IDX 0 43 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE__SHIFT 0x10 44 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE_MASK 0x00010000L 45 46 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev); 47 48 /** 49 * vega20_ih_init_register_offset - Initialize register offset for ih rings 50 * 51 * @adev: amdgpu_device pointer 52 * 53 * Initialize register offset ih rings (VEGA20). 54 */ 55 static void vega20_ih_init_register_offset(struct amdgpu_device *adev) 56 { 57 struct amdgpu_ih_regs *ih_regs; 58 59 if (adev->irq.ih.ring_size) { 60 ih_regs = &adev->irq.ih.ih_regs; 61 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE); 62 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI); 63 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL); 64 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR); 65 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR); 66 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR); 67 ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO); 68 ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI); 69 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL; 70 } 71 72 if (adev->irq.ih1.ring_size) { 73 ih_regs = &adev->irq.ih1.ih_regs; 74 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1); 75 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1); 76 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1); 77 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1); 78 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1); 79 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1); 80 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1; 81 } 82 83 if (adev->irq.ih2.ring_size) { 84 ih_regs = &adev->irq.ih2.ih_regs; 85 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2); 86 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2); 87 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2); 88 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2); 89 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2); 90 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2); 91 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2; 92 } 93 } 94 95 /** 96 * vega20_ih_toggle_ring_interrupts - toggle the interrupt ring buffer 97 * 98 * @adev: amdgpu_device pointer 99 * @ih: amdgpu_ih_ring pointer 100 * @enable: true - enable the interrupts, false - disable the interrupts 101 * 102 * Toggle the interrupt ring buffer (VEGA20) 103 */ 104 static int vega20_ih_toggle_ring_interrupts(struct amdgpu_device *adev, 105 struct amdgpu_ih_ring *ih, 106 bool enable) 107 { 108 struct amdgpu_ih_regs *ih_regs; 109 uint32_t tmp; 110 111 ih_regs = &ih->ih_regs; 112 113 tmp = RREG32(ih_regs->ih_rb_cntl); 114 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0)); 115 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1); 116 117 if (enable) { 118 /* Unset the CLEAR_OVERFLOW bit to make sure the next step 119 * is switching the bit from 0 to 1 120 */ 121 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 122 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 123 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) 124 return -ETIMEDOUT; 125 } else { 126 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 127 } 128 129 /* Clear RB_OVERFLOW bit */ 130 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1); 131 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 132 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) 133 return -ETIMEDOUT; 134 } else { 135 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 136 } 137 138 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows 139 * can be detected. 140 */ 141 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 142 } 143 144 /* enable_intr field is only valid in ring0 */ 145 if (ih == &adev->irq.ih) 146 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0)); 147 if (amdgpu_sriov_vf(adev)) { 148 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) { 149 dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n"); 150 return -ETIMEDOUT; 151 } 152 } else { 153 WREG32(ih_regs->ih_rb_cntl, tmp); 154 } 155 156 if (enable) { 157 ih->enabled = true; 158 } else { 159 /* set rptr, wptr to 0 */ 160 WREG32(ih_regs->ih_rb_rptr, 0); 161 WREG32(ih_regs->ih_rb_wptr, 0); 162 ih->enabled = false; 163 ih->rptr = 0; 164 } 165 166 return 0; 167 } 168 169 /** 170 * vega20_ih_toggle_interrupts - Toggle all the available interrupt ring buffers 171 * 172 * @adev: amdgpu_device pointer 173 * @enable: enable or disable interrupt ring buffers 174 * 175 * Toggle all the available interrupt ring buffers (VEGA20). 176 */ 177 static int vega20_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable) 178 { 179 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2}; 180 int i; 181 int r; 182 183 for (i = 0; i < ARRAY_SIZE(ih); i++) { 184 if (ih[i]->ring_size) { 185 r = vega20_ih_toggle_ring_interrupts(adev, ih[i], enable); 186 if (r) 187 return r; 188 } 189 } 190 191 return 0; 192 } 193 194 static uint32_t vega20_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl) 195 { 196 int rb_bufsz = order_base_2(ih->ring_size / 4); 197 198 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 199 MC_SPACE, ih->use_bus_addr ? 1 : 4); 200 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 201 WPTR_OVERFLOW_CLEAR, 1); 202 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 203 WPTR_OVERFLOW_ENABLE, 1); 204 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz); 205 /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register 206 * value is written to memory 207 */ 208 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 209 WPTR_WRITEBACK_ENABLE, 1); 210 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1); 211 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0); 212 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0); 213 214 return ih_rb_cntl; 215 } 216 217 static uint32_t vega20_ih_doorbell_rptr(struct amdgpu_ih_ring *ih) 218 { 219 u32 ih_doorbell_rtpr = 0; 220 221 if (ih->use_doorbell) { 222 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 223 IH_DOORBELL_RPTR, OFFSET, 224 ih->doorbell_index); 225 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 226 IH_DOORBELL_RPTR, 227 ENABLE, 1); 228 } else { 229 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 230 IH_DOORBELL_RPTR, 231 ENABLE, 0); 232 } 233 return ih_doorbell_rtpr; 234 } 235 236 /** 237 * vega20_ih_enable_ring - enable an ih ring buffer 238 * 239 * @adev: amdgpu_device pointer 240 * @ih: amdgpu_ih_ring pointer 241 * 242 * Enable an ih ring buffer (VEGA20) 243 */ 244 static int vega20_ih_enable_ring(struct amdgpu_device *adev, 245 struct amdgpu_ih_ring *ih) 246 { 247 struct amdgpu_ih_regs *ih_regs; 248 uint32_t tmp; 249 250 ih_regs = &ih->ih_regs; 251 252 /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/ 253 WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8); 254 WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff); 255 256 tmp = RREG32(ih_regs->ih_rb_cntl); 257 tmp = vega20_ih_rb_cntl(ih, tmp); 258 if (ih == &adev->irq.ih) 259 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled); 260 if (ih == &adev->irq.ih1) 261 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1); 262 if (amdgpu_sriov_vf(adev)) { 263 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) { 264 dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n"); 265 return -ETIMEDOUT; 266 } 267 } else { 268 WREG32(ih_regs->ih_rb_cntl, tmp); 269 } 270 271 if (ih == &adev->irq.ih) { 272 /* set the ih ring 0 writeback address whether it's enabled or not */ 273 WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr)); 274 WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF); 275 } 276 277 /* set rptr, wptr to 0 */ 278 WREG32(ih_regs->ih_rb_wptr, 0); 279 WREG32(ih_regs->ih_rb_rptr, 0); 280 281 WREG32(ih_regs->ih_doorbell_rptr, vega20_ih_doorbell_rptr(ih)); 282 283 return 0; 284 } 285 286 static uint32_t vega20_setup_retry_doorbell(u32 doorbell_index) 287 { 288 u32 val = 0; 289 290 val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, OFFSET, doorbell_index); 291 val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, ENABLE, 1); 292 293 return val; 294 } 295 296 /** 297 * vega20_ih_irq_init - init and enable the interrupt ring 298 * 299 * @adev: amdgpu_device pointer 300 * 301 * Allocate a ring buffer for the interrupt controller, 302 * enable the RLC, disable interrupts, enable the IH 303 * ring buffer and enable it (VI). 304 * Called at device load and reume. 305 * Returns 0 for success, errors for failure. 306 */ 307 static int vega20_ih_irq_init(struct amdgpu_device *adev) 308 { 309 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2}; 310 u32 ih_chicken; 311 int ret; 312 int i; 313 314 /* disable irqs */ 315 ret = vega20_ih_toggle_interrupts(adev, false); 316 if (ret) 317 return ret; 318 319 adev->nbio.funcs->ih_control(adev); 320 321 if (!amdgpu_sriov_vf(adev)) { 322 if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 2, 1)) && 323 adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) { 324 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN); 325 if (adev->irq.ih.use_bus_addr) { 326 ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN, 327 MC_SPACE_GPA_ENABLE, 1); 328 } 329 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken); 330 } 331 332 /* psp firmware won't program IH_CHICKEN for aldebaran 333 * driver needs to program it properly according to 334 * MC_SPACE type in IH_RB_CNTL */ 335 if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0)) || 336 (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2)) || 337 (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 5))) { 338 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN); 339 if (adev->irq.ih.use_bus_addr) { 340 ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN, 341 MC_SPACE_GPA_ENABLE, 1); 342 } 343 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken); 344 } 345 } 346 347 for (i = 0; i < ARRAY_SIZE(ih); i++) { 348 if (ih[i]->ring_size) { 349 ret = vega20_ih_enable_ring(adev, ih[i]); 350 if (ret) 351 return ret; 352 } 353 } 354 355 if (!amdgpu_sriov_vf(adev)) 356 adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell, 357 adev->irq.ih.doorbell_index); 358 359 pci_set_master(adev->pdev); 360 361 /* Allocate the doorbell for IH Retry CAM */ 362 adev->irq.retry_cam_doorbell_index = (adev->doorbell_index.ih + 3) << 1; 363 WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RETRY_CAM, 364 vega20_setup_retry_doorbell(adev->irq.retry_cam_doorbell_index)); 365 366 /* Enable IH Retry CAM */ 367 if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0) || 368 amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2) || 369 amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 5)) 370 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL_ALDEBARAN, 371 ENABLE, 1); 372 else 373 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL, ENABLE, 1); 374 375 adev->irq.retry_cam_enabled = true; 376 377 /* enable interrupts */ 378 ret = vega20_ih_toggle_interrupts(adev, true); 379 if (ret) 380 return ret; 381 382 if (adev->irq.ih_soft.ring_size) 383 adev->irq.ih_soft.enabled = true; 384 385 return 0; 386 } 387 388 /** 389 * vega20_ih_irq_disable - disable interrupts 390 * 391 * @adev: amdgpu_device pointer 392 * 393 * Disable interrupts on the hw (VEGA20). 394 */ 395 static void vega20_ih_irq_disable(struct amdgpu_device *adev) 396 { 397 vega20_ih_toggle_interrupts(adev, false); 398 399 /* Wait and acknowledge irq */ 400 mdelay(1); 401 } 402 403 /** 404 * vega20_ih_get_wptr - get the IH ring buffer wptr 405 * 406 * @adev: amdgpu_device pointer 407 * @ih: amdgpu_ih_ring pointer 408 * 409 * Get the IH ring buffer wptr from either the register 410 * or the writeback memory buffer (VEGA20). Also check for 411 * ring buffer overflow and deal with it. 412 * Returns the value of the wptr. 413 */ 414 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev, 415 struct amdgpu_ih_ring *ih) 416 { 417 u32 wptr, tmp; 418 struct amdgpu_ih_regs *ih_regs; 419 420 if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) { 421 /* Only ring0 supports writeback. On other rings fall back 422 * to register-based code with overflow checking below. 423 * ih_soft ring doesn't have any backing hardware registers, 424 * update wptr and return. 425 */ 426 wptr = le32_to_cpu(*ih->wptr_cpu); 427 428 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 429 goto out; 430 } 431 432 ih_regs = &ih->ih_regs; 433 434 /* Double check that the overflow wasn't already cleared. */ 435 wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr); 436 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 437 goto out; 438 439 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0); 440 441 /* When a ring buffer overflow happen start parsing interrupt 442 * from the last not overwritten vector (wptr + 32). Hopefully 443 * this should allow us to catchup. 444 */ 445 tmp = (wptr + 32) & ih->ptr_mask; 446 dev_warn(adev->dev, "IH ring buffer overflow " 447 "(0x%08X, 0x%08X, 0x%08X)\n", 448 wptr, ih->rptr, tmp); 449 ih->rptr = tmp; 450 451 tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl); 452 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1); 453 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 454 455 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows 456 * can be detected. 457 */ 458 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 459 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 460 461 out: 462 return (wptr & ih->ptr_mask); 463 } 464 465 /** 466 * vega20_ih_irq_rearm - rearm IRQ if lost 467 * 468 * @adev: amdgpu_device pointer 469 * @ih: amdgpu_ih_ring pointer 470 * 471 */ 472 static void vega20_ih_irq_rearm(struct amdgpu_device *adev, 473 struct amdgpu_ih_ring *ih) 474 { 475 uint32_t v = 0; 476 uint32_t i = 0; 477 struct amdgpu_ih_regs *ih_regs; 478 479 ih_regs = &ih->ih_regs; 480 481 /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */ 482 for (i = 0; i < MAX_REARM_RETRY; i++) { 483 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr); 484 if ((v < ih->ring_size) && (v != ih->rptr)) 485 WDOORBELL32(ih->doorbell_index, ih->rptr); 486 else 487 break; 488 } 489 } 490 491 /** 492 * vega20_ih_set_rptr - set the IH ring buffer rptr 493 * 494 * @adev: amdgpu_device pointer 495 * @ih: amdgpu_ih_ring pointer 496 * 497 * Set the IH ring buffer rptr. 498 */ 499 static void vega20_ih_set_rptr(struct amdgpu_device *adev, 500 struct amdgpu_ih_ring *ih) 501 { 502 struct amdgpu_ih_regs *ih_regs; 503 504 if (ih == &adev->irq.ih_soft) 505 return; 506 507 if (ih->use_doorbell) { 508 /* XXX check if swapping is necessary on BE */ 509 *ih->rptr_cpu = ih->rptr; 510 WDOORBELL32(ih->doorbell_index, ih->rptr); 511 512 if (amdgpu_sriov_vf(adev)) 513 vega20_ih_irq_rearm(adev, ih); 514 } else { 515 ih_regs = &ih->ih_regs; 516 WREG32(ih_regs->ih_rb_rptr, ih->rptr); 517 } 518 } 519 520 /** 521 * vega20_ih_self_irq - dispatch work for ring 1 and 2 522 * 523 * @adev: amdgpu_device pointer 524 * @source: irq source 525 * @entry: IV with WPTR update 526 * 527 * Update the WPTR from the IV and schedule work to handle the entries. 528 */ 529 static int vega20_ih_self_irq(struct amdgpu_device *adev, 530 struct amdgpu_irq_src *source, 531 struct amdgpu_iv_entry *entry) 532 { 533 switch (entry->ring_id) { 534 case 1: 535 schedule_work(&adev->irq.ih1_work); 536 break; 537 case 2: 538 schedule_work(&adev->irq.ih2_work); 539 break; 540 default: 541 break; 542 } 543 return 0; 544 } 545 546 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = { 547 .process = vega20_ih_self_irq, 548 }; 549 550 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev) 551 { 552 adev->irq.self_irq.num_types = 0; 553 adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs; 554 } 555 556 static int vega20_ih_early_init(struct amdgpu_ip_block *ip_block) 557 { 558 struct amdgpu_device *adev = ip_block->adev; 559 560 vega20_ih_set_interrupt_funcs(adev); 561 vega20_ih_set_self_irq_funcs(adev); 562 return 0; 563 } 564 565 static int vega20_ih_sw_init(struct amdgpu_ip_block *ip_block) 566 { 567 struct amdgpu_device *adev = ip_block->adev; 568 bool use_bus_addr = true; 569 int r; 570 571 r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0, 572 &adev->irq.self_irq); 573 if (r) 574 return r; 575 576 if ((adev->flags & AMD_IS_APU) && 577 (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2))) 578 use_bus_addr = false; 579 580 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr); 581 if (r) 582 return r; 583 584 adev->irq.ih.use_doorbell = true; 585 adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1; 586 587 r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, use_bus_addr); 588 if (r) 589 return r; 590 591 adev->irq.ih1.use_doorbell = true; 592 adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1; 593 594 if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) != IP_VERSION(4, 4, 2) && 595 amdgpu_ip_version(adev, OSSSYS_HWIP, 0) != IP_VERSION(4, 4, 5)) { 596 r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true); 597 if (r) 598 return r; 599 600 adev->irq.ih2.use_doorbell = true; 601 adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1; 602 } 603 604 /* initialize ih control registers offset */ 605 vega20_ih_init_register_offset(adev); 606 607 r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, use_bus_addr); 608 if (r) 609 return r; 610 611 r = amdgpu_irq_init(adev); 612 613 return r; 614 } 615 616 static int vega20_ih_sw_fini(struct amdgpu_ip_block *ip_block) 617 { 618 struct amdgpu_device *adev = ip_block->adev; 619 620 amdgpu_irq_fini_sw(adev); 621 622 return 0; 623 } 624 625 static int vega20_ih_hw_init(struct amdgpu_ip_block *ip_block) 626 { 627 int r; 628 struct amdgpu_device *adev = ip_block->adev; 629 630 r = vega20_ih_irq_init(adev); 631 if (r) 632 return r; 633 634 return 0; 635 } 636 637 static int vega20_ih_hw_fini(struct amdgpu_ip_block *ip_block) 638 { 639 vega20_ih_irq_disable(ip_block->adev); 640 641 return 0; 642 } 643 644 static int vega20_ih_suspend(struct amdgpu_ip_block *ip_block) 645 { 646 return vega20_ih_hw_fini(ip_block); 647 } 648 649 static int vega20_ih_resume(struct amdgpu_ip_block *ip_block) 650 { 651 return vega20_ih_hw_init(ip_block); 652 } 653 654 static bool vega20_ih_is_idle(void *handle) 655 { 656 /* todo */ 657 return true; 658 } 659 660 static int vega20_ih_wait_for_idle(struct amdgpu_ip_block *ip_block) 661 { 662 /* todo */ 663 return -ETIMEDOUT; 664 } 665 666 static int vega20_ih_soft_reset(struct amdgpu_ip_block *ip_block) 667 { 668 /* todo */ 669 670 return 0; 671 } 672 673 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev, 674 bool enable) 675 { 676 uint32_t data, def, field_val; 677 678 if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) { 679 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL); 680 field_val = enable ? 0 : 1; 681 data = REG_SET_FIELD(data, IH_CLK_CTRL, 682 IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val); 683 data = REG_SET_FIELD(data, IH_CLK_CTRL, 684 IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val); 685 data = REG_SET_FIELD(data, IH_CLK_CTRL, 686 DBUS_MUX_CLK_SOFT_OVERRIDE, field_val); 687 data = REG_SET_FIELD(data, IH_CLK_CTRL, 688 OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val); 689 data = REG_SET_FIELD(data, IH_CLK_CTRL, 690 LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val); 691 data = REG_SET_FIELD(data, IH_CLK_CTRL, 692 DYN_CLK_SOFT_OVERRIDE, field_val); 693 data = REG_SET_FIELD(data, IH_CLK_CTRL, 694 REG_CLK_SOFT_OVERRIDE, field_val); 695 if (def != data) 696 WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data); 697 } 698 } 699 700 static int vega20_ih_set_clockgating_state(void *handle, 701 enum amd_clockgating_state state) 702 { 703 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 704 705 vega20_ih_update_clockgating_state(adev, 706 state == AMD_CG_STATE_GATE); 707 return 0; 708 709 } 710 711 static int vega20_ih_set_powergating_state(void *handle, 712 enum amd_powergating_state state) 713 { 714 return 0; 715 } 716 717 const struct amd_ip_funcs vega20_ih_ip_funcs = { 718 .name = "vega20_ih", 719 .early_init = vega20_ih_early_init, 720 .sw_init = vega20_ih_sw_init, 721 .sw_fini = vega20_ih_sw_fini, 722 .hw_init = vega20_ih_hw_init, 723 .hw_fini = vega20_ih_hw_fini, 724 .suspend = vega20_ih_suspend, 725 .resume = vega20_ih_resume, 726 .is_idle = vega20_ih_is_idle, 727 .wait_for_idle = vega20_ih_wait_for_idle, 728 .soft_reset = vega20_ih_soft_reset, 729 .set_clockgating_state = vega20_ih_set_clockgating_state, 730 .set_powergating_state = vega20_ih_set_powergating_state, 731 }; 732 733 static const struct amdgpu_ih_funcs vega20_ih_funcs = { 734 .get_wptr = vega20_ih_get_wptr, 735 .decode_iv = amdgpu_ih_decode_iv_helper, 736 .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper, 737 .set_rptr = vega20_ih_set_rptr 738 }; 739 740 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev) 741 { 742 adev->irq.ih_funcs = &vega20_ih_funcs; 743 } 744 745 const struct amdgpu_ip_block_version vega20_ih_ip_block = { 746 .type = AMD_IP_BLOCK_TYPE_IH, 747 .major = 4, 748 .minor = 2, 749 .rev = 0, 750 .funcs = &vega20_ih_ip_funcs, 751 }; 752