1 /* 2 * Copyright 2021 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 29 #include "oss/osssys_6_0_0_offset.h" 30 #include "oss/osssys_6_0_0_sh_mask.h" 31 32 #include "soc15_common.h" 33 #include "ih_v6_0.h" 34 35 #define MAX_REARM_RETRY 10 36 37 static void ih_v6_0_set_interrupt_funcs(struct amdgpu_device *adev); 38 39 /** 40 * ih_v6_0_init_register_offset - Initialize register offset for ih rings 41 * 42 * @adev: amdgpu_device pointer 43 * 44 * Initialize register offset ih rings (IH_V6_0). 45 */ ih_v6_0_init_register_offset(struct amdgpu_device * adev)46 static void ih_v6_0_init_register_offset(struct amdgpu_device *adev) 47 { 48 struct amdgpu_ih_regs *ih_regs; 49 50 /* ih ring 2 is removed 51 * ih ring and ih ring 1 are available */ 52 if (adev->irq.ih.ring_size) { 53 ih_regs = &adev->irq.ih.ih_regs; 54 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_BASE); 55 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_BASE_HI); 56 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_CNTL); 57 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_WPTR); 58 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_RPTR); 59 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_DOORBELL_RPTR); 60 ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_WPTR_ADDR_LO); 61 ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_WPTR_ADDR_HI); 62 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL; 63 } 64 65 if (adev->irq.ih1.ring_size) { 66 ih_regs = &adev->irq.ih1.ih_regs; 67 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_BASE_RING1); 68 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_BASE_HI_RING1); 69 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_CNTL_RING1); 70 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_WPTR_RING1); 71 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_RB_RPTR_RING1); 72 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, regIH_DOORBELL_RPTR_RING1); 73 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1; 74 } 75 } 76 77 /** 78 * force_update_wptr_for_self_int - Force update the wptr for self interrupt 79 * 80 * @adev: amdgpu_device pointer 81 * @threshold: threshold to trigger the wptr reporting 82 * @timeout: timeout to trigger the wptr reporting 83 * @enabled: Enable/disable timeout flush mechanism 84 * 85 * threshold input range: 0 ~ 15, default 0, 86 * real_threshold = 2^threshold 87 * timeout input range: 0 ~ 20, default 8, 88 * real_timeout = (2^timeout) * 1024 / (socclk_freq) 89 * 90 * Force update wptr for self interrupt ( >= SIENNA_CICHLID). 91 */ 92 static void force_update_wptr_for_self_int(struct amdgpu_device * adev,u32 threshold,u32 timeout,bool enabled)93 force_update_wptr_for_self_int(struct amdgpu_device *adev, 94 u32 threshold, u32 timeout, bool enabled) 95 { 96 u32 ih_cntl, ih_rb_cntl; 97 98 ih_cntl = RREG32_SOC15(OSSSYS, 0, regIH_CNTL2); 99 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, regIH_RB_CNTL_RING1); 100 101 ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL2, 102 SELF_IV_FORCE_WPTR_UPDATE_TIMEOUT, timeout); 103 ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL2, 104 SELF_IV_FORCE_WPTR_UPDATE_ENABLE, enabled); 105 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING1, 106 RB_USED_INT_THRESHOLD, threshold); 107 108 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 109 if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING1, ih_rb_cntl)) 110 return; 111 } else { 112 WREG32_SOC15(OSSSYS, 0, regIH_RB_CNTL_RING1, ih_rb_cntl); 113 } 114 115 WREG32_SOC15(OSSSYS, 0, regIH_CNTL2, ih_cntl); 116 } 117 118 /** 119 * ih_v6_0_toggle_ring_interrupts - toggle the interrupt ring buffer 120 * 121 * @adev: amdgpu_device pointer 122 * @ih: amdgpu_ih_ring pointer 123 * @enable: true - enable the interrupts, false - disable the interrupts 124 * 125 * Toggle the interrupt ring buffer (IH_V6_0) 126 */ ih_v6_0_toggle_ring_interrupts(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih,bool enable)127 static int ih_v6_0_toggle_ring_interrupts(struct amdgpu_device *adev, 128 struct amdgpu_ih_ring *ih, 129 bool enable) 130 { 131 struct amdgpu_ih_regs *ih_regs; 132 uint32_t tmp; 133 134 ih_regs = &ih->ih_regs; 135 136 tmp = RREG32(ih_regs->ih_rb_cntl); 137 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0)); 138 139 if (enable) { 140 /* Unset the CLEAR_OVERFLOW bit to make sure the next step 141 * is switching the bit from 0 to 1 142 */ 143 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 144 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 145 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) 146 return -ETIMEDOUT; 147 } else { 148 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 149 } 150 151 /* Clear RB_OVERFLOW bit */ 152 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1); 153 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 154 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) 155 return -ETIMEDOUT; 156 } else { 157 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 158 } 159 160 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows 161 * can be detected. 162 */ 163 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 164 } 165 166 /* enable_intr field is only valid in ring0 */ 167 if (ih == &adev->irq.ih) 168 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0)); 169 170 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 171 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) 172 return -ETIMEDOUT; 173 } else { 174 WREG32(ih_regs->ih_rb_cntl, tmp); 175 } 176 177 if (enable) { 178 ih->enabled = true; 179 } else { 180 /* set rptr, wptr to 0 */ 181 WREG32(ih_regs->ih_rb_rptr, 0); 182 WREG32(ih_regs->ih_rb_wptr, 0); 183 ih->enabled = false; 184 ih->rptr = 0; 185 } 186 187 return 0; 188 } 189 190 /** 191 * ih_v6_0_toggle_interrupts - Toggle all the available interrupt ring buffers 192 * 193 * @adev: amdgpu_device pointer 194 * @enable: enable or disable interrupt ring buffers 195 * 196 * Toggle all the available interrupt ring buffers (IH_V6_0). 197 */ ih_v6_0_toggle_interrupts(struct amdgpu_device * adev,bool enable)198 static int ih_v6_0_toggle_interrupts(struct amdgpu_device *adev, bool enable) 199 { 200 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1}; 201 int i; 202 int r; 203 204 for (i = 0; i < ARRAY_SIZE(ih); i++) { 205 if (ih[i]->ring_size) { 206 r = ih_v6_0_toggle_ring_interrupts(adev, ih[i], enable); 207 if (r) 208 return r; 209 } 210 } 211 212 return 0; 213 } 214 ih_v6_0_rb_cntl(struct amdgpu_ih_ring * ih,uint32_t ih_rb_cntl)215 static uint32_t ih_v6_0_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl) 216 { 217 int rb_bufsz = order_base_2(ih->ring_size / 4); 218 219 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 220 MC_SPACE, ih->use_bus_addr ? 2 : 4); 221 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 222 WPTR_OVERFLOW_CLEAR, 1); 223 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 224 WPTR_OVERFLOW_ENABLE, 1); 225 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz); 226 /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register 227 * value is written to memory 228 */ 229 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 230 WPTR_WRITEBACK_ENABLE, 1); 231 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1); 232 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0); 233 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0); 234 235 return ih_rb_cntl; 236 } 237 ih_v6_0_doorbell_rptr(struct amdgpu_ih_ring * ih)238 static uint32_t ih_v6_0_doorbell_rptr(struct amdgpu_ih_ring *ih) 239 { 240 u32 ih_doorbell_rtpr = 0; 241 242 if (ih->use_doorbell) { 243 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 244 IH_DOORBELL_RPTR, OFFSET, 245 ih->doorbell_index); 246 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 247 IH_DOORBELL_RPTR, 248 ENABLE, 1); 249 } else { 250 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 251 IH_DOORBELL_RPTR, 252 ENABLE, 0); 253 } 254 return ih_doorbell_rtpr; 255 } 256 257 /** 258 * ih_v6_0_enable_ring - enable an ih ring buffer 259 * 260 * @adev: amdgpu_device pointer 261 * @ih: amdgpu_ih_ring pointer 262 * 263 * Enable an ih ring buffer (IH_V6_0) 264 */ ih_v6_0_enable_ring(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)265 static int ih_v6_0_enable_ring(struct amdgpu_device *adev, 266 struct amdgpu_ih_ring *ih) 267 { 268 struct amdgpu_ih_regs *ih_regs; 269 uint32_t tmp; 270 271 ih_regs = &ih->ih_regs; 272 273 /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/ 274 WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8); 275 WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff); 276 277 tmp = RREG32(ih_regs->ih_rb_cntl); 278 tmp = ih_v6_0_rb_cntl(ih, tmp); 279 if (ih == &adev->irq.ih) 280 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled); 281 if (ih == &adev->irq.ih1) { 282 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 0); 283 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1); 284 } 285 286 if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) { 287 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) { 288 DRM_ERROR("PSP program IH_RB_CNTL failed!\n"); 289 return -ETIMEDOUT; 290 } 291 } else { 292 WREG32(ih_regs->ih_rb_cntl, tmp); 293 } 294 295 if (ih == &adev->irq.ih) { 296 /* set the ih ring 0 writeback address whether it's enabled or not */ 297 WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr)); 298 WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF); 299 } 300 301 /* set rptr, wptr to 0 */ 302 WREG32(ih_regs->ih_rb_wptr, 0); 303 WREG32(ih_regs->ih_rb_rptr, 0); 304 305 WREG32(ih_regs->ih_doorbell_rptr, ih_v6_0_doorbell_rptr(ih)); 306 307 return 0; 308 } 309 310 /** 311 * ih_v6_0_irq_init - init and enable the interrupt ring 312 * 313 * @adev: amdgpu_device pointer 314 * 315 * Allocate a ring buffer for the interrupt controller, 316 * enable the RLC, disable interrupts, enable the IH 317 * ring buffer and enable it. 318 * Called at device load and reume. 319 * Returns 0 for success, errors for failure. 320 */ ih_v6_0_irq_init(struct amdgpu_device * adev)321 static int ih_v6_0_irq_init(struct amdgpu_device *adev) 322 { 323 struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1}; 324 u32 ih_chicken; 325 u32 tmp; 326 int ret; 327 int i; 328 329 /* disable irqs */ 330 ret = ih_v6_0_toggle_interrupts(adev, false); 331 if (ret) 332 return ret; 333 334 adev->nbio.funcs->ih_control(adev); 335 336 if (unlikely((adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) || 337 (adev->firmware.load_type == AMDGPU_FW_LOAD_RLC_BACKDOOR_AUTO))) { 338 if (ih[0]->use_bus_addr) { 339 ih_chicken = RREG32_SOC15(OSSSYS, 0, regIH_CHICKEN); 340 ih_chicken = REG_SET_FIELD(ih_chicken, 341 IH_CHICKEN, MC_SPACE_GPA_ENABLE, 1); 342 WREG32_SOC15(OSSSYS, 0, regIH_CHICKEN, ih_chicken); 343 } 344 } 345 346 for (i = 0; i < ARRAY_SIZE(ih); i++) { 347 if (ih[i]->ring_size) { 348 ret = ih_v6_0_enable_ring(adev, ih[i]); 349 if (ret) 350 return ret; 351 } 352 } 353 354 /* update doorbell range for ih ring 0 */ 355 adev->nbio.funcs->ih_doorbell_range(adev, ih[0]->use_doorbell, 356 ih[0]->doorbell_index); 357 358 tmp = RREG32_SOC15(OSSSYS, 0, regIH_STORM_CLIENT_LIST_CNTL); 359 tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL, 360 CLIENT18_IS_STORM_CLIENT, 1); 361 WREG32_SOC15(OSSSYS, 0, regIH_STORM_CLIENT_LIST_CNTL, tmp); 362 363 tmp = RREG32_SOC15(OSSSYS, 0, regIH_INT_FLOOD_CNTL); 364 tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1); 365 WREG32_SOC15(OSSSYS, 0, regIH_INT_FLOOD_CNTL, tmp); 366 367 /* GC/MMHUB UTCL2 page fault interrupts are configured as 368 * MSI storm capable interrupts by deafult. The delay is 369 * used to avoid ISR being called too frequently 370 * when page fault happens on several continuous page 371 * and thus avoid MSI storm */ 372 tmp = RREG32_SOC15(OSSSYS, 0, regIH_MSI_STORM_CTRL); 373 tmp = REG_SET_FIELD(tmp, IH_MSI_STORM_CTRL, 374 DELAY, 3); 375 WREG32_SOC15(OSSSYS, 0, regIH_MSI_STORM_CTRL, tmp); 376 377 /* Redirect the interrupts to IH RB1 for dGPU */ 378 if (adev->irq.ih1.ring_size) { 379 tmp = RREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_INDEX); 380 tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_INDEX, INDEX, 0); 381 WREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_INDEX, tmp); 382 383 tmp = RREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_DATA); 384 tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA, CLIENT_ID, 0xa); 385 tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA, SOURCE_ID, 0x0); 386 tmp = REG_SET_FIELD(tmp, IH_RING1_CLIENT_CFG_DATA, 387 SOURCE_ID_MATCH_ENABLE, 0x1); 388 389 WREG32_SOC15(OSSSYS, 0, regIH_RING1_CLIENT_CFG_DATA, tmp); 390 } 391 392 pci_set_master(adev->pdev); 393 394 /* enable interrupts */ 395 ret = ih_v6_0_toggle_interrupts(adev, true); 396 if (ret) 397 return ret; 398 /* enable wptr force update for self int */ 399 force_update_wptr_for_self_int(adev, 0, 8, true); 400 401 if (adev->irq.ih_soft.ring_size) 402 adev->irq.ih_soft.enabled = true; 403 404 return 0; 405 } 406 407 /** 408 * ih_v6_0_irq_disable - disable interrupts 409 * 410 * @adev: amdgpu_device pointer 411 * 412 * Disable interrupts on the hw. 413 */ ih_v6_0_irq_disable(struct amdgpu_device * adev)414 static void ih_v6_0_irq_disable(struct amdgpu_device *adev) 415 { 416 force_update_wptr_for_self_int(adev, 0, 8, false); 417 ih_v6_0_toggle_interrupts(adev, false); 418 419 /* Wait and acknowledge irq */ 420 mdelay(1); 421 } 422 423 /** 424 * ih_v6_0_get_wptr - get the IH ring buffer wptr 425 * 426 * @adev: amdgpu_device pointer 427 * @ih: amdgpu_ih_ring pointer 428 * 429 * Get the IH ring buffer wptr from either the register 430 * or the writeback memory buffer. Also check for 431 * ring buffer overflow and deal with it. 432 * Returns the value of the wptr. 433 */ ih_v6_0_get_wptr(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)434 static u32 ih_v6_0_get_wptr(struct amdgpu_device *adev, 435 struct amdgpu_ih_ring *ih) 436 { 437 u32 wptr, tmp; 438 struct amdgpu_ih_regs *ih_regs; 439 440 wptr = le32_to_cpu(*ih->wptr_cpu); 441 ih_regs = &ih->ih_regs; 442 443 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 444 goto out; 445 446 wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr); 447 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 448 goto out; 449 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0); 450 451 /* When a ring buffer overflow happen start parsing interrupt 452 * from the last not overwritten vector (wptr + 32). Hopefully 453 * this should allow us to catch up. 454 */ 455 tmp = (wptr + 32) & ih->ptr_mask; 456 dev_warn(adev->dev, "IH ring buffer overflow " 457 "(0x%08X, 0x%08X, 0x%08X)\n", 458 wptr, ih->rptr, tmp); 459 ih->rptr = tmp; 460 461 tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl); 462 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1); 463 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 464 465 /* Unset the CLEAR_OVERFLOW bit immediately so new overflows 466 * can be detected. 467 */ 468 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0); 469 WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp); 470 out: 471 return (wptr & ih->ptr_mask); 472 } 473 474 /** 475 * ih_v6_0_irq_rearm - rearm IRQ if lost 476 * 477 * @adev: amdgpu_device pointer 478 * @ih: amdgpu_ih_ring pointer 479 * 480 */ ih_v6_0_irq_rearm(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)481 static void ih_v6_0_irq_rearm(struct amdgpu_device *adev, 482 struct amdgpu_ih_ring *ih) 483 { 484 uint32_t v = 0; 485 uint32_t i = 0; 486 struct amdgpu_ih_regs *ih_regs; 487 488 ih_regs = &ih->ih_regs; 489 490 /* Rearm IRQ / re-write doorbell if doorbell write is lost */ 491 for (i = 0; i < MAX_REARM_RETRY; i++) { 492 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr); 493 if ((v < ih->ring_size) && (v != ih->rptr)) 494 WDOORBELL32(ih->doorbell_index, ih->rptr); 495 else 496 break; 497 } 498 } 499 500 /** 501 * ih_v6_0_set_rptr - set the IH ring buffer rptr 502 * 503 * @adev: amdgpu_device pointer 504 * @ih: amdgpu_ih_ring pointer 505 * 506 * Set the IH ring buffer rptr. 507 */ ih_v6_0_set_rptr(struct amdgpu_device * adev,struct amdgpu_ih_ring * ih)508 static void ih_v6_0_set_rptr(struct amdgpu_device *adev, 509 struct amdgpu_ih_ring *ih) 510 { 511 struct amdgpu_ih_regs *ih_regs; 512 513 if (ih->use_doorbell) { 514 /* XXX check if swapping is necessary on BE */ 515 *ih->rptr_cpu = ih->rptr; 516 WDOORBELL32(ih->doorbell_index, ih->rptr); 517 518 if (amdgpu_sriov_vf(adev)) 519 ih_v6_0_irq_rearm(adev, ih); 520 } else { 521 ih_regs = &ih->ih_regs; 522 WREG32(ih_regs->ih_rb_rptr, ih->rptr); 523 } 524 } 525 526 /** 527 * ih_v6_0_self_irq - dispatch work for ring 1 528 * 529 * @adev: amdgpu_device pointer 530 * @source: irq source 531 * @entry: IV with WPTR update 532 * 533 * Update the WPTR from the IV and schedule work to handle the entries. 534 */ ih_v6_0_self_irq(struct amdgpu_device * adev,struct amdgpu_irq_src * source,struct amdgpu_iv_entry * entry)535 static int ih_v6_0_self_irq(struct amdgpu_device *adev, 536 struct amdgpu_irq_src *source, 537 struct amdgpu_iv_entry *entry) 538 { 539 uint32_t wptr = cpu_to_le32(entry->src_data[0]); 540 541 switch (entry->ring_id) { 542 case 1: 543 *adev->irq.ih1.wptr_cpu = wptr; 544 schedule_work(&adev->irq.ih1_work); 545 break; 546 default: 547 break; 548 } 549 return 0; 550 } 551 552 static const struct amdgpu_irq_src_funcs ih_v6_0_self_irq_funcs = { 553 .process = ih_v6_0_self_irq, 554 }; 555 ih_v6_0_set_self_irq_funcs(struct amdgpu_device * adev)556 static void ih_v6_0_set_self_irq_funcs(struct amdgpu_device *adev) 557 { 558 adev->irq.self_irq.num_types = 0; 559 adev->irq.self_irq.funcs = &ih_v6_0_self_irq_funcs; 560 } 561 ih_v6_0_early_init(void * handle)562 static int ih_v6_0_early_init(void *handle) 563 { 564 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 565 566 ih_v6_0_set_interrupt_funcs(adev); 567 ih_v6_0_set_self_irq_funcs(adev); 568 return 0; 569 } 570 ih_v6_0_sw_init(void * handle)571 static int ih_v6_0_sw_init(void *handle) 572 { 573 int r; 574 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 575 bool use_bus_addr; 576 577 r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_IH, 0, 578 &adev->irq.self_irq); 579 580 if (r) 581 return r; 582 583 /* use gpu virtual address for ih ring 584 * until ih_checken is programmed to allow 585 * use bus address for ih ring by psp bl */ 586 use_bus_addr = 587 (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) ? false : true; 588 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr); 589 if (r) 590 return r; 591 592 adev->irq.ih.use_doorbell = true; 593 adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1; 594 595 if (!(adev->flags & AMD_IS_APU)) { 596 r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, IH_RING_SIZE, 597 use_bus_addr); 598 if (r) 599 return r; 600 601 adev->irq.ih1.use_doorbell = true; 602 adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1; 603 } 604 605 /* initialize ih control register offset */ 606 ih_v6_0_init_register_offset(adev); 607 608 r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, true); 609 if (r) 610 return r; 611 612 r = amdgpu_irq_init(adev); 613 614 return r; 615 } 616 ih_v6_0_sw_fini(void * handle)617 static int ih_v6_0_sw_fini(void *handle) 618 { 619 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 620 621 amdgpu_irq_fini_sw(adev); 622 623 return 0; 624 } 625 ih_v6_0_hw_init(void * handle)626 static int ih_v6_0_hw_init(void *handle) 627 { 628 int r; 629 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 630 631 r = ih_v6_0_irq_init(adev); 632 if (r) 633 return r; 634 635 return 0; 636 } 637 ih_v6_0_hw_fini(void * handle)638 static int ih_v6_0_hw_fini(void *handle) 639 { 640 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 641 642 ih_v6_0_irq_disable(adev); 643 644 return 0; 645 } 646 ih_v6_0_suspend(void * handle)647 static int ih_v6_0_suspend(void *handle) 648 { 649 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 650 651 return ih_v6_0_hw_fini(adev); 652 } 653 ih_v6_0_resume(void * handle)654 static int ih_v6_0_resume(void *handle) 655 { 656 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 657 658 return ih_v6_0_hw_init(adev); 659 } 660 ih_v6_0_is_idle(void * handle)661 static bool ih_v6_0_is_idle(void *handle) 662 { 663 /* todo */ 664 return true; 665 } 666 ih_v6_0_wait_for_idle(void * handle)667 static int ih_v6_0_wait_for_idle(void *handle) 668 { 669 /* todo */ 670 return -ETIMEDOUT; 671 } 672 ih_v6_0_soft_reset(void * handle)673 static int ih_v6_0_soft_reset(void *handle) 674 { 675 /* todo */ 676 return 0; 677 } 678 ih_v6_0_update_clockgating_state(struct amdgpu_device * adev,bool enable)679 static void ih_v6_0_update_clockgating_state(struct amdgpu_device *adev, 680 bool enable) 681 { 682 uint32_t data, def, field_val; 683 684 if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) { 685 def = data = RREG32_SOC15(OSSSYS, 0, regIH_CLK_CTRL); 686 field_val = enable ? 0 : 1; 687 data = REG_SET_FIELD(data, IH_CLK_CTRL, 688 DBUS_MUX_CLK_SOFT_OVERRIDE, field_val); 689 data = REG_SET_FIELD(data, IH_CLK_CTRL, 690 OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val); 691 data = REG_SET_FIELD(data, IH_CLK_CTRL, 692 LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val); 693 data = REG_SET_FIELD(data, IH_CLK_CTRL, 694 DYN_CLK_SOFT_OVERRIDE, field_val); 695 data = REG_SET_FIELD(data, IH_CLK_CTRL, 696 REG_CLK_SOFT_OVERRIDE, field_val); 697 if (def != data) 698 WREG32_SOC15(OSSSYS, 0, regIH_CLK_CTRL, data); 699 } 700 } 701 ih_v6_0_set_clockgating_state(void * handle,enum amd_clockgating_state state)702 static int ih_v6_0_set_clockgating_state(void *handle, 703 enum amd_clockgating_state state) 704 { 705 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 706 707 ih_v6_0_update_clockgating_state(adev, 708 state == AMD_CG_STATE_GATE); 709 return 0; 710 } 711 ih_v6_0_update_ih_mem_power_gating(struct amdgpu_device * adev,bool enable)712 static void ih_v6_0_update_ih_mem_power_gating(struct amdgpu_device *adev, 713 bool enable) 714 { 715 uint32_t ih_mem_pwr_cntl; 716 717 /* Disable ih sram power cntl before switch powergating mode */ 718 ih_mem_pwr_cntl = RREG32_SOC15(OSSSYS, 0, regIH_MEM_POWER_CTRL); 719 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 720 IH_BUFFER_MEM_POWER_CTRL_EN, 0); 721 WREG32_SOC15(OSSSYS, 0, regIH_MEM_POWER_CTRL, ih_mem_pwr_cntl); 722 723 /* It is recommended to set mem powergating mode to DS mode */ 724 if (enable) { 725 /* mem power mode */ 726 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 727 IH_BUFFER_MEM_POWER_LS_EN, 0); 728 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 729 IH_BUFFER_MEM_POWER_DS_EN, 1); 730 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 731 IH_BUFFER_MEM_POWER_SD_EN, 0); 732 /* cam mem power mode */ 733 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 734 IH_RETRY_INT_CAM_MEM_POWER_LS_EN, 0); 735 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 736 IH_RETRY_INT_CAM_MEM_POWER_DS_EN, 1); 737 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 738 IH_RETRY_INT_CAM_MEM_POWER_SD_EN, 0); 739 /* re-enable power cntl */ 740 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 741 IH_BUFFER_MEM_POWER_CTRL_EN, 1); 742 } else { 743 /* mem power mode */ 744 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 745 IH_BUFFER_MEM_POWER_LS_EN, 0); 746 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 747 IH_BUFFER_MEM_POWER_DS_EN, 0); 748 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 749 IH_BUFFER_MEM_POWER_SD_EN, 0); 750 /* cam mem power mode */ 751 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 752 IH_RETRY_INT_CAM_MEM_POWER_LS_EN, 0); 753 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 754 IH_RETRY_INT_CAM_MEM_POWER_DS_EN, 0); 755 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 756 IH_RETRY_INT_CAM_MEM_POWER_SD_EN, 0); 757 /* re-enable power cntl*/ 758 ih_mem_pwr_cntl = REG_SET_FIELD(ih_mem_pwr_cntl, IH_MEM_POWER_CTRL, 759 IH_BUFFER_MEM_POWER_CTRL_EN, 1); 760 } 761 762 WREG32_SOC15(OSSSYS, 0, regIH_MEM_POWER_CTRL, ih_mem_pwr_cntl); 763 } 764 ih_v6_0_set_powergating_state(void * handle,enum amd_powergating_state state)765 static int ih_v6_0_set_powergating_state(void *handle, 766 enum amd_powergating_state state) 767 { 768 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 769 bool enable = (state == AMD_PG_STATE_GATE); 770 771 if (adev->pg_flags & AMD_PG_SUPPORT_IH_SRAM_PG) 772 ih_v6_0_update_ih_mem_power_gating(adev, enable); 773 774 return 0; 775 } 776 ih_v6_0_get_clockgating_state(void * handle,u64 * flags)777 static void ih_v6_0_get_clockgating_state(void *handle, u64 *flags) 778 { 779 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 780 781 if (!RREG32_SOC15(OSSSYS, 0, regIH_CLK_CTRL)) 782 *flags |= AMD_CG_SUPPORT_IH_CG; 783 } 784 785 static const struct amd_ip_funcs ih_v6_0_ip_funcs = { 786 .name = "ih_v6_0", 787 .early_init = ih_v6_0_early_init, 788 .late_init = NULL, 789 .sw_init = ih_v6_0_sw_init, 790 .sw_fini = ih_v6_0_sw_fini, 791 .hw_init = ih_v6_0_hw_init, 792 .hw_fini = ih_v6_0_hw_fini, 793 .suspend = ih_v6_0_suspend, 794 .resume = ih_v6_0_resume, 795 .is_idle = ih_v6_0_is_idle, 796 .wait_for_idle = ih_v6_0_wait_for_idle, 797 .soft_reset = ih_v6_0_soft_reset, 798 .set_clockgating_state = ih_v6_0_set_clockgating_state, 799 .set_powergating_state = ih_v6_0_set_powergating_state, 800 .get_clockgating_state = ih_v6_0_get_clockgating_state, 801 .dump_ip_state = NULL, 802 .print_ip_state = NULL, 803 }; 804 805 static const struct amdgpu_ih_funcs ih_v6_0_funcs = { 806 .get_wptr = ih_v6_0_get_wptr, 807 .decode_iv = amdgpu_ih_decode_iv_helper, 808 .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper, 809 .set_rptr = ih_v6_0_set_rptr 810 }; 811 ih_v6_0_set_interrupt_funcs(struct amdgpu_device * adev)812 static void ih_v6_0_set_interrupt_funcs(struct amdgpu_device *adev) 813 { 814 adev->irq.ih_funcs = &ih_v6_0_funcs; 815 } 816 817 const struct amdgpu_ip_block_version ih_v6_0_ip_block = { 818 .type = AMD_IP_BLOCK_TYPE_IH, 819 .major = 6, 820 .minor = 0, 821 .rev = 0, 822 .funcs = &ih_v6_0_ip_funcs, 823 }; 824