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1/*2 * Copyright 2018 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#include "priv.h"23 24#include <core/memory.h>25#include <subdev/mmu.h>26#include <engine/fifo.h>27 28#include <nvif/class.h>29 30void31gv100_fault_buffer_process(struct work_struct *work)32{33 struct nvkm_fault *fault = container_of(work, typeof(*fault), nrpfb_work);34 struct nvkm_fault_buffer *buffer = fault->buffer[0];35 struct nvkm_device *device = fault->subdev.device;36 struct nvkm_memory *mem = buffer->mem;37 u32 get = nvkm_rd32(device, buffer->get);38 u32 put = nvkm_rd32(device, buffer->put);39 if (put == get)40 return;41 42 nvkm_kmap(mem);43 while (get != put) {44 const u32 base = get * buffer->fault->func->buffer.entry_size;45 const u32 instlo = nvkm_ro32(mem, base + 0x00);46 const u32 insthi = nvkm_ro32(mem, base + 0x04);47 const u32 addrlo = nvkm_ro32(mem, base + 0x08);48 const u32 addrhi = nvkm_ro32(mem, base + 0x0c);49 const u32 timelo = nvkm_ro32(mem, base + 0x10);50 const u32 timehi = nvkm_ro32(mem, base + 0x14);51 const u32 info0 = nvkm_ro32(mem, base + 0x18);52 const u32 info1 = nvkm_ro32(mem, base + 0x1c);53 struct nvkm_fault_data info;54 55 if (++get == buffer->entries)56 get = 0;57 nvkm_wr32(device, buffer->get, get);58 59 info.addr = ((u64)addrhi << 32) | addrlo;60 info.inst = ((u64)insthi << 32) | instlo;61 info.time = ((u64)timehi << 32) | timelo;62 info.engine = (info0 & 0x000000ff);63 info.valid = (info1 & 0x80000000) >> 31;64 info.gpc = (info1 & 0x1f000000) >> 24;65 info.hub = (info1 & 0x00100000) >> 20;66 info.access = (info1 & 0x000f0000) >> 16;67 info.client = (info1 & 0x00007f00) >> 8;68 info.reason = (info1 & 0x0000001f);69 70 nvkm_fifo_fault(device->fifo, &info);71 }72 nvkm_done(mem);73}74 75static void76gv100_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)77{78 struct nvkm_device *device = buffer->fault->subdev.device;79 const u32 intr = buffer->id ? 0x08000000 : 0x20000000;80 if (enable)81 nvkm_mask(device, 0x100a2c, intr, intr);82 else83 nvkm_mask(device, 0x100a34, intr, intr);84}85 86static void87gv100_fault_buffer_fini(struct nvkm_fault_buffer *buffer)88{89 struct nvkm_device *device = buffer->fault->subdev.device;90 const u32 foff = buffer->id * 0x14;91 nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x00000000);92}93 94static void95gv100_fault_buffer_init(struct nvkm_fault_buffer *buffer)96{97 struct nvkm_device *device = buffer->fault->subdev.device;98 const u32 foff = buffer->id * 0x14;99 100 nvkm_mask(device, 0x100e34 + foff, 0xc0000000, 0x40000000);101 nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->addr));102 nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->addr));103 nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x80000000);104}105 106static void107gv100_fault_buffer_info(struct nvkm_fault_buffer *buffer)108{109 struct nvkm_device *device = buffer->fault->subdev.device;110 const u32 foff = buffer->id * 0x14;111 112 nvkm_mask(device, 0x100e34 + foff, 0x40000000, 0x40000000);113 114 buffer->entries = nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;115 buffer->get = 0x100e2c + foff;116 buffer->put = 0x100e30 + foff;117}118 119static int120gv100_fault_ntfy_nrpfb(struct nvkm_event_ntfy *ntfy, u32 bits)121{122 struct nvkm_fault *fault = container_of(ntfy, typeof(*fault), nrpfb);123 124 schedule_work(&fault->nrpfb_work);125 return NVKM_EVENT_KEEP;126}127 128static void129gv100_fault_intr_fault(struct nvkm_fault *fault)130{131 struct nvkm_subdev *subdev = &fault->subdev;132 struct nvkm_device *device = subdev->device;133 struct nvkm_fault_data info;134 const u32 addrlo = nvkm_rd32(device, 0x100e4c);135 const u32 addrhi = nvkm_rd32(device, 0x100e50);136 const u32 info0 = nvkm_rd32(device, 0x100e54);137 const u32 insthi = nvkm_rd32(device, 0x100e58);138 const u32 info1 = nvkm_rd32(device, 0x100e5c);139 140 info.addr = ((u64)addrhi << 32) | addrlo;141 info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);142 info.time = 0;143 info.engine = (info0 & 0x000000ff);144 info.valid = (info1 & 0x80000000) >> 31;145 info.gpc = (info1 & 0x1f000000) >> 24;146 info.hub = (info1 & 0x00100000) >> 20;147 info.access = (info1 & 0x000f0000) >> 16;148 info.client = (info1 & 0x00007f00) >> 8;149 info.reason = (info1 & 0x0000001f);150 151 nvkm_fifo_fault(device->fifo, &info);152}153 154static void155gv100_fault_intr(struct nvkm_fault *fault)156{157 struct nvkm_subdev *subdev = &fault->subdev;158 struct nvkm_device *device = subdev->device;159 u32 stat = nvkm_rd32(device, 0x100a20);160 161 if (stat & 0x80000000) {162 gv100_fault_intr_fault(fault);163 nvkm_wr32(device, 0x100e60, 0x80000000);164 stat &= ~0x80000000;165 }166 167 if (stat & 0x20000000) {168 if (fault->buffer[0]) {169 nvkm_event_ntfy(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING);170 stat &= ~0x20000000;171 }172 }173 174 if (stat & 0x08000000) {175 if (fault->buffer[1]) {176 nvkm_event_ntfy(&fault->event, 1, NVKM_FAULT_BUFFER_EVENT_PENDING);177 stat &= ~0x08000000;178 }179 }180 181 if (stat) {182 nvkm_debug(subdev, "intr %08x\n", stat);183 }184}185 186static void187gv100_fault_fini(struct nvkm_fault *fault)188{189 nvkm_event_ntfy_block(&fault->nrpfb);190 flush_work(&fault->nrpfb_work);191 192 if (fault->buffer[0])193 fault->func->buffer.fini(fault->buffer[0]);194 195 nvkm_mask(fault->subdev.device, 0x100a34, 0x80000000, 0x80000000);196}197 198static void199gv100_fault_init(struct nvkm_fault *fault)200{201 nvkm_mask(fault->subdev.device, 0x100a2c, 0x80000000, 0x80000000);202 fault->func->buffer.init(fault->buffer[0]);203 nvkm_event_ntfy_allow(&fault->nrpfb);204}205 206int207gv100_fault_oneinit(struct nvkm_fault *fault)208{209 nvkm_event_ntfy_add(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING, true,210 gv100_fault_ntfy_nrpfb, &fault->nrpfb);211 return 0;212}213 214static const struct nvkm_fault_func215gv100_fault = {216 .oneinit = gv100_fault_oneinit,217 .init = gv100_fault_init,218 .fini = gv100_fault_fini,219 .intr = gv100_fault_intr,220 .buffer.nr = 2,221 .buffer.entry_size = 32,222 .buffer.info = gv100_fault_buffer_info,223 .buffer.pin = gp100_fault_buffer_pin,224 .buffer.init = gv100_fault_buffer_init,225 .buffer.fini = gv100_fault_buffer_fini,226 .buffer.intr = gv100_fault_buffer_intr,227 /*TODO: Figure out how to expose non-replayable fault buffer, which,228 * for some reason, is where recoverable CE faults appear...229 *230 * It's a bit tricky, as both NVKM and SVM will need access to231 * the non-replayable fault buffer.232 */233 .user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },234};235 236int237gv100_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,238 struct nvkm_fault **pfault)239{240 int ret = nvkm_fault_new_(&gv100_fault, device, type, inst, pfault);241 if (ret)242 return ret;243 244 INIT_WORK(&(*pfault)->nrpfb_work, gv100_fault_buffer_process);245 return 0;246}247