1/* $NetBSD: amdgpu_navi10_ih.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $ */ 2 3/* 4 * Copyright 2019 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: amdgpu_navi10_ih.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $"); 28 29#include <linux/pci.h> 30 31#include "amdgpu.h" 32#include "amdgpu_ih.h" 33 34#include "oss/osssys_5_0_0_offset.h" 35#include "oss/osssys_5_0_0_sh_mask.h" 36 37#include "soc15_common.h" 38#include "navi10_ih.h" 39 40 41static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev); 42 43/** 44 * navi10_ih_enable_interrupts - Enable the interrupt ring buffer 45 * 46 * @adev: amdgpu_device pointer 47 * 48 * Enable the interrupt ring buffer (NAVI10). 49 */ 50static void navi10_ih_enable_interrupts(struct amdgpu_device *adev) 51{ 52 u32 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL); 53 54 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 1); 55 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 1); 56 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl); 57 adev->irq.ih.enabled = true; 58} 59 60/** 61 * navi10_ih_disable_interrupts - Disable the interrupt ring buffer 62 * 63 * @adev: amdgpu_device pointer 64 * 65 * Disable the interrupt ring buffer (NAVI10). 66 */ 67static void navi10_ih_disable_interrupts(struct amdgpu_device *adev) 68{ 69 u32 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL); 70 71 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 0); 72 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, ENABLE_INTR, 0); 73 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl); 74 /* set rptr, wptr to 0 */ 75 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, 0); 76 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR, 0); 77 adev->irq.ih.enabled = false; 78 adev->irq.ih.rptr = 0; 79} 80 81static uint32_t navi10_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl) 82{ 83 int rb_bufsz = order_base_2(ih->ring_size / 4); 84 85 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 86 MC_SPACE, ih->use_bus_addr ? 1 : 4); 87 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 88 WPTR_OVERFLOW_CLEAR, 1); 89 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 90 WPTR_OVERFLOW_ENABLE, 1); 91 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz); 92 /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register 93 * value is written to memory 94 */ 95 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, 96 WPTR_WRITEBACK_ENABLE, 1); 97 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1); 98 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0); 99 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0); 100 101 return ih_rb_cntl; 102} 103 104/** 105 * navi10_ih_irq_init - init and enable the interrupt ring 106 * 107 * @adev: amdgpu_device pointer 108 * 109 * Allocate a ring buffer for the interrupt controller, 110 * enable the RLC, disable interrupts, enable the IH 111 * ring buffer and enable it (NAVI). 112 * Called at device load and reume. 113 * Returns 0 for success, errors for failure. 114 */ 115static int navi10_ih_irq_init(struct amdgpu_device *adev) 116{ 117 struct amdgpu_ih_ring *ih = &adev->irq.ih; 118 u32 ih_rb_cntl, ih_doorbell_rtpr, ih_chicken; 119 u32 tmp; 120 121 /* disable irqs */ 122 navi10_ih_disable_interrupts(adev); 123 124 adev->nbio.funcs->ih_control(adev); 125 126 /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/ 127 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE, ih->gpu_addr >> 8); 128 WREG32_SOC15(OSSSYS, 0, mmIH_RB_BASE_HI, (ih->gpu_addr >> 40) & 0xff); 129 130 ih_rb_cntl = RREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL); 131 ih_rb_cntl = navi10_ih_rb_cntl(ih, ih_rb_cntl); 132 ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RPTR_REARM, 133 !!adev->irq.msi_enabled); 134 135 if (unlikely(adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT)) { 136 if (ih->use_bus_addr) { 137 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN); 138 ih_chicken = REG_SET_FIELD(ih_chicken, 139 IH_CHICKEN, MC_SPACE_GPA_ENABLE, 1); 140 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken); 141 } 142 } 143 144 WREG32_SOC15(OSSSYS, 0, mmIH_RB_CNTL, ih_rb_cntl); 145 146 /* set the writeback address whether it's enabled or not */ 147 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO, 148 lower_32_bits(ih->wptr_addr)); 149 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI, 150 upper_32_bits(ih->wptr_addr) & 0xFFFF); 151 152 /* set rptr, wptr to 0 */ 153 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, 0); 154 WREG32_SOC15(OSSSYS, 0, mmIH_RB_WPTR, 0); 155 156 ih_doorbell_rtpr = RREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RPTR); 157 if (ih->use_doorbell) { 158 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 159 IH_DOORBELL_RPTR, OFFSET, 160 ih->doorbell_index); 161 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 162 IH_DOORBELL_RPTR, ENABLE, 1); 163 } else { 164 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr, 165 IH_DOORBELL_RPTR, ENABLE, 0); 166 } 167 WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RPTR, ih_doorbell_rtpr); 168 169 adev->nbio.funcs->ih_doorbell_range(adev, ih->use_doorbell, 170 ih->doorbell_index); 171 172 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL); 173 tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL, 174 CLIENT18_IS_STORM_CLIENT, 1); 175 WREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL, tmp); 176 177 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL); 178 tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1); 179 WREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL, tmp); 180 181 pci_set_master(adev->pdev); 182 183 /* enable interrupts */ 184 navi10_ih_enable_interrupts(adev); 185 186 return 0; 187} 188 189/** 190 * navi10_ih_irq_disable - disable interrupts 191 * 192 * @adev: amdgpu_device pointer 193 * 194 * Disable interrupts on the hw (NAVI10). 195 */ 196static void navi10_ih_irq_disable(struct amdgpu_device *adev) 197{ 198 navi10_ih_disable_interrupts(adev); 199 200 /* Wait and acknowledge irq */ 201 mdelay(1); 202} 203 204/** 205 * navi10_ih_get_wptr - get the IH ring buffer wptr 206 * 207 * @adev: amdgpu_device pointer 208 * 209 * Get the IH ring buffer wptr from either the register 210 * or the writeback memory buffer (NAVI10). Also check for 211 * ring buffer overflow and deal with it. 212 * Returns the value of the wptr. 213 */ 214static u32 navi10_ih_get_wptr(struct amdgpu_device *adev, 215 struct amdgpu_ih_ring *ih) 216{ 217 u32 wptr, reg, tmp; 218 219 wptr = le32_to_cpu(*ih->wptr_cpu); 220 221 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 222 goto out; 223 224 reg = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR); 225 wptr = RREG32_NO_KIQ(reg); 226 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) 227 goto out; 228 wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0); 229 230 /* When a ring buffer overflow happen start parsing interrupt 231 * from the last not overwritten vector (wptr + 32). Hopefully 232 * this should allow us to catch up. 233 */ 234 tmp = (wptr + 32) & ih->ptr_mask; 235 dev_warn(adev->dev, "IH ring buffer overflow " 236 "(0x%08X, 0x%08X, 0x%08X)\n", 237 wptr, ih->rptr, tmp); 238 ih->rptr = tmp; 239 240 reg = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL); 241 tmp = RREG32_NO_KIQ(reg); 242 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1); 243 WREG32_NO_KIQ(reg, tmp); 244out: 245 return (wptr & ih->ptr_mask); 246} 247 248/** 249 * navi10_ih_decode_iv - decode an interrupt vector 250 * 251 * @adev: amdgpu_device pointer 252 * 253 * Decodes the interrupt vector at the current rptr 254 * position and also advance the position. 255 */ 256static void navi10_ih_decode_iv(struct amdgpu_device *adev, 257 struct amdgpu_ih_ring *ih, 258 struct amdgpu_iv_entry *entry) 259{ 260 /* wptr/rptr are in bytes! */ 261 u32 ring_index = ih->rptr >> 2; 262 uint32_t dw[8]; 263 264 dw[0] = le32_to_cpu(ih->ring[ring_index + 0]); 265 dw[1] = le32_to_cpu(ih->ring[ring_index + 1]); 266 dw[2] = le32_to_cpu(ih->ring[ring_index + 2]); 267 dw[3] = le32_to_cpu(ih->ring[ring_index + 3]); 268 dw[4] = le32_to_cpu(ih->ring[ring_index + 4]); 269 dw[5] = le32_to_cpu(ih->ring[ring_index + 5]); 270 dw[6] = le32_to_cpu(ih->ring[ring_index + 6]); 271 dw[7] = le32_to_cpu(ih->ring[ring_index + 7]); 272 273 entry->client_id = dw[0] & 0xff; 274 entry->src_id = (dw[0] >> 8) & 0xff; 275 entry->ring_id = (dw[0] >> 16) & 0xff; 276 entry->vmid = (dw[0] >> 24) & 0xf; 277 entry->vmid_src = (dw[0] >> 31); 278 entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32); 279 entry->timestamp_src = dw[2] >> 31; 280 entry->pasid = dw[3] & 0xffff; 281 entry->pasid_src = dw[3] >> 31; 282 entry->src_data[0] = dw[4]; 283 entry->src_data[1] = dw[5]; 284 entry->src_data[2] = dw[6]; 285 entry->src_data[3] = dw[7]; 286 287 /* wptr/rptr are in bytes! */ 288 ih->rptr += 32; 289} 290 291/** 292 * navi10_ih_set_rptr - set the IH ring buffer rptr 293 * 294 * @adev: amdgpu_device pointer 295 * 296 * Set the IH ring buffer rptr. 297 */ 298static void navi10_ih_set_rptr(struct amdgpu_device *adev, 299 struct amdgpu_ih_ring *ih) 300{ 301 if (ih->use_doorbell) { 302 /* XXX check if swapping is necessary on BE */ 303 *ih->rptr_cpu = ih->rptr; 304 WDOORBELL32(ih->doorbell_index, ih->rptr); 305 } else 306 WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, ih->rptr); 307} 308 309static int navi10_ih_early_init(void *handle) 310{ 311 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 312 313 navi10_ih_set_interrupt_funcs(adev); 314 return 0; 315} 316 317static int navi10_ih_sw_init(void *handle) 318{ 319 int r; 320 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 321 bool use_bus_addr; 322 323 /* use gpu virtual address for ih ring 324 * until ih_checken is programmed to allow 325 * use bus address for ih ring by psp bl */ 326 use_bus_addr = 327 (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) ? false : true; 328 r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, use_bus_addr); 329 if (r) 330 return r; 331 332 adev->irq.ih.use_doorbell = true; 333 adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1; 334 335 r = amdgpu_irq_init(adev); 336 337 return r; 338} 339 340static int navi10_ih_sw_fini(void *handle) 341{ 342 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 343 344 amdgpu_irq_fini(adev); 345 amdgpu_ih_ring_fini(adev, &adev->irq.ih); 346 347 return 0; 348} 349 350static int navi10_ih_hw_init(void *handle) 351{ 352 int r; 353 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 354 355 r = navi10_ih_irq_init(adev); 356 if (r) 357 return r; 358 359 return 0; 360} 361 362static int navi10_ih_hw_fini(void *handle) 363{ 364 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 365 366 navi10_ih_irq_disable(adev); 367 368 return 0; 369} 370 371static int navi10_ih_suspend(void *handle) 372{ 373 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 374 375 return navi10_ih_hw_fini(adev); 376} 377 378static int navi10_ih_resume(void *handle) 379{ 380 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 381 382 return navi10_ih_hw_init(adev); 383} 384 385static bool navi10_ih_is_idle(void *handle) 386{ 387 /* todo */ 388 return true; 389} 390 391static int navi10_ih_wait_for_idle(void *handle) 392{ 393 /* todo */ 394 return -ETIMEDOUT; 395} 396 397static int navi10_ih_soft_reset(void *handle) 398{ 399 /* todo */ 400 return 0; 401} 402 403static void navi10_ih_update_clockgating_state(struct amdgpu_device *adev, 404 bool enable) 405{ 406 uint32_t data, def, field_val; 407 408 if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) { 409 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL); 410 field_val = enable ? 0 : 1; 411 data = REG_SET_FIELD(data, IH_CLK_CTRL, 412 DBUS_MUX_CLK_SOFT_OVERRIDE, field_val); 413 data = REG_SET_FIELD(data, IH_CLK_CTRL, 414 OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val); 415 data = REG_SET_FIELD(data, IH_CLK_CTRL, 416 LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val); 417 data = REG_SET_FIELD(data, IH_CLK_CTRL, 418 DYN_CLK_SOFT_OVERRIDE, field_val); 419 data = REG_SET_FIELD(data, IH_CLK_CTRL, 420 REG_CLK_SOFT_OVERRIDE, field_val); 421 if (def != data) 422 WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data); 423 } 424 425 return; 426} 427 428static int navi10_ih_set_clockgating_state(void *handle, 429 enum amd_clockgating_state state) 430{ 431 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 432 433 navi10_ih_update_clockgating_state(adev, 434 state == AMD_CG_STATE_GATE); 435 return 0; 436} 437 438static int navi10_ih_set_powergating_state(void *handle, 439 enum amd_powergating_state state) 440{ 441 return 0; 442} 443 444static void navi10_ih_get_clockgating_state(void *handle, u32 *flags) 445{ 446 struct amdgpu_device *adev = (struct amdgpu_device *)handle; 447 448 if (!RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL)) 449 *flags |= AMD_CG_SUPPORT_IH_CG; 450 451 return; 452} 453 454static const struct amd_ip_funcs navi10_ih_ip_funcs = { 455 .name = "navi10_ih", 456 .early_init = navi10_ih_early_init, 457 .late_init = NULL, 458 .sw_init = navi10_ih_sw_init, 459 .sw_fini = navi10_ih_sw_fini, 460 .hw_init = navi10_ih_hw_init, 461 .hw_fini = navi10_ih_hw_fini, 462 .suspend = navi10_ih_suspend, 463 .resume = navi10_ih_resume, 464 .is_idle = navi10_ih_is_idle, 465 .wait_for_idle = navi10_ih_wait_for_idle, 466 .soft_reset = navi10_ih_soft_reset, 467 .set_clockgating_state = navi10_ih_set_clockgating_state, 468 .set_powergating_state = navi10_ih_set_powergating_state, 469 .get_clockgating_state = navi10_ih_get_clockgating_state, 470}; 471 472static const struct amdgpu_ih_funcs navi10_ih_funcs = { 473 .get_wptr = navi10_ih_get_wptr, 474 .decode_iv = navi10_ih_decode_iv, 475 .set_rptr = navi10_ih_set_rptr 476}; 477 478static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev) 479{ 480 if (adev->irq.ih_funcs == NULL) 481 adev->irq.ih_funcs = &navi10_ih_funcs; 482} 483 484const struct amdgpu_ip_block_version navi10_ih_ip_block = 485{ 486 .type = AMD_IP_BLOCK_TYPE_IH, 487 .major = 5, 488 .minor = 0, 489 .rev = 0, 490 .funcs = &navi10_ih_ip_funcs, 491}; 492