drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c

   1 /*
   2  * Copyright 2018 Red Hat 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 #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
  30 static void
  31 gv100_fault_buffer_process(struct nvkm_fault_buffer *buffer)
  32 {
  33         struct nvkm_device *device = buffer->fault->subdev.device;
  34         struct nvkm_memory *mem = buffer->mem;
  35         u32 get = nvkm_rd32(device, buffer->get);
  36         u32 put = nvkm_rd32(device, buffer->put);
  37         if (put == get)
  38                 return;
  39
  40         nvkm_kmap(mem);
  41         while (get != put) {
  42                 const u32   base = get * buffer->fault->func->buffer.entry_size;
  43                 const u32 instlo = nvkm_ro32(mem, base + 0x00);
  44                 const u32 insthi = nvkm_ro32(mem, base + 0x04);
  45                 const u32 addrlo = nvkm_ro32(mem, base + 0x08);
  46                 const u32 addrhi = nvkm_ro32(mem, base + 0x0c);
  47                 const u32 timelo = nvkm_ro32(mem, base + 0x10);
  48                 const u32 timehi = nvkm_ro32(mem, base + 0x14);
  49                 const u32  info0 = nvkm_ro32(mem, base + 0x18);
  50                 const u32  info1 = nvkm_ro32(mem, base + 0x1c);
  51                 struct nvkm_fault_data info;
  52
  53                 if (++get == buffer->entries)
  54                         get = 0;
  55                 nvkm_wr32(device, buffer->get, get);
  56
  57                 info.addr   = ((u64)addrhi << 32) | addrlo;
  58                 info.inst   = ((u64)insthi << 32) | instlo;
  59                 info.time   = ((u64)timehi << 32) | timelo;
  60                 info.engine = (info0 & 0x000000ff);
  61                 info.valid  = (info1 & 0x80000000) >> 31;
  62                 info.gpc    = (info1 & 0x1f000000) >> 24;
  63                 info.hub    = (info1 & 0x00100000) >> 20;
  64                 info.access = (info1 & 0x000f0000) >> 16;
  65                 info.client = (info1 & 0x00007f00) >> 8;
  66                 info.reason = (info1 & 0x0000001f);
  67
  68                 nvkm_fifo_fault(device->fifo, &info);
  69         }
  70         nvkm_done(mem);
  71 }
  72
  73 static void
  74 gv100_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
  75 {
  76         struct nvkm_device *device = buffer->fault->subdev.device;
  77         const u32 intr = buffer->id ? 0x08000000 : 0x20000000;
  78         if (enable)
  79                 nvkm_mask(device, 0x100a2c, intr, intr);
  80         else
  81                 nvkm_mask(device, 0x100a34, intr, intr);
  82 }
  83
  84 static void
  85 gv100_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
  86 {
  87         struct nvkm_device *device = buffer->fault->subdev.device;
  88         const u32 foff = buffer->id * 0x14;
  89         nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x00000000);
  90 }
  91
  92 static void
  93 gv100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
  94 {
  95         struct nvkm_device *device = buffer->fault->subdev.device;
  96         const u32 foff = buffer->id * 0x14;
  97
  98         nvkm_mask(device, 0x100e34 + foff, 0xc0000000, 0x40000000);
  99         nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->addr));
 100         nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->addr));
 101         nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x80000000);
 102 }
 103
 104 static void
 105 gv100_fault_buffer_info(struct nvkm_fault_buffer *buffer)
 106 {
 107         struct nvkm_device *device = buffer->fault->subdev.device;
 108         const u32 foff = buffer->id * 0x14;
 109
 110         nvkm_mask(device, 0x100e34 + foff, 0x40000000, 0x40000000);
 111
 112         buffer->entries = nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;
 113         buffer->get = 0x100e2c + foff;
 114         buffer->put = 0x100e30 + foff;
 115 }
 116
 117 static int
 118 gv100_fault_ntfy_nrpfb(struct nvkm_notify *notify)
 119 {
 120         struct nvkm_fault *fault = container_of(notify, typeof(*fault), nrpfb);
 121         gv100_fault_buffer_process(fault->buffer[0]);
 122         return NVKM_NOTIFY_KEEP;
 123 }
 124
 125 static void
 126 gv100_fault_intr_fault(struct nvkm_fault *fault)
 127 {
 128         struct nvkm_subdev *subdev = &fault->subdev;
 129         struct nvkm_device *device = subdev->device;
 130         struct nvkm_fault_data info;
 131         const u32 addrlo = nvkm_rd32(device, 0x100e4c);
 132         const u32 addrhi = nvkm_rd32(device, 0x100e50);
 133         const u32  info0 = nvkm_rd32(device, 0x100e54);
 134         const u32 insthi = nvkm_rd32(device, 0x100e58);
 135         const u32  info1 = nvkm_rd32(device, 0x100e5c);
 136
 137         info.addr = ((u64)addrhi << 32) | addrlo;
 138         info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);
 139         info.time = 0;
 140         info.engine = (info0 & 0x000000ff);
 141         info.valid  = (info1 & 0x80000000) >> 31;
 142         info.gpc    = (info1 & 0x1f000000) >> 24;
 143         info.hub    = (info1 & 0x00100000) >> 20;
 144         info.access = (info1 & 0x000f0000) >> 16;
 145         info.client = (info1 & 0x00007f00) >> 8;
 146         info.reason = (info1 & 0x0000001f);
 147
 148         nvkm_fifo_fault(device->fifo, &info);
 149 }
 150
 151 static void
 152 gv100_fault_intr(struct nvkm_fault *fault)
 153 {
 154         struct nvkm_subdev *subdev = &fault->subdev;
 155         struct nvkm_device *device = subdev->device;
 156         u32 stat = nvkm_rd32(device, 0x100a20);
 157
 158         if (stat & 0x80000000) {
 159                 gv100_fault_intr_fault(fault);
 160                 nvkm_wr32(device, 0x100e60, 0x80000000);
 161                 stat &= ~0x80000000;
 162         }
 163
 164         if (stat & 0x20000000) {
 165                 if (fault->buffer[0]) {
 166                         nvkm_event_send(&fault->event, 1, 0, NULL, 0);
 167                         stat &= ~0x20000000;
 168                 }
 169         }
 170
 171         if (stat & 0x08000000) {
 172                 if (fault->buffer[1]) {
 173                         nvkm_event_send(&fault->event, 1, 1, NULL, 0);
 174                         stat &= ~0x08000000;
 175                 }
 176         }
 177
 178         if (stat) {
 179                 nvkm_debug(subdev, "intr %08x\n", stat);
 180         }
 181 }
 182
 183 static void
 184 gv100_fault_fini(struct nvkm_fault *fault)
 185 {
 186         nvkm_notify_put(&fault->nrpfb);
 187         if (fault->buffer[0])
 188                 fault->func->buffer.fini(fault->buffer[0]);
 189         nvkm_mask(fault->subdev.device, 0x100a34, 0x80000000, 0x80000000);
 190 }
 191
 192 static void
 193 gv100_fault_init(struct nvkm_fault *fault)
 194 {
 195         nvkm_mask(fault->subdev.device, 0x100a2c, 0x80000000, 0x80000000);
 196         fault->func->buffer.init(fault->buffer[0]);
 197         nvkm_notify_get(&fault->nrpfb);
 198 }
 199
 200 int
 201 gv100_fault_oneinit(struct nvkm_fault *fault)
 202 {
 203         return nvkm_notify_init(&fault->buffer[0]->object, &fault->event,
 204                                 gv100_fault_ntfy_nrpfb, true, NULL, 0, 0,
 205                                 &fault->nrpfb);
 206 }
 207
 208 static const struct nvkm_fault_func
 209 gv100_fault = {
 210         .oneinit = gv100_fault_oneinit,
 211         .init = gv100_fault_init,
 212         .fini = gv100_fault_fini,
 213         .intr = gv100_fault_intr,
 214         .buffer.nr = 2,
 215         .buffer.entry_size = 32,
 216         .buffer.info = gv100_fault_buffer_info,
 217         .buffer.pin = gp100_fault_buffer_pin,
 218         .buffer.init = gv100_fault_buffer_init,
 219         .buffer.fini = gv100_fault_buffer_fini,
 220         .buffer.intr = gv100_fault_buffer_intr,
 221         /*TODO: Figure out how to expose non-replayable fault buffer, which,
 222          *      for some reason, is where recoverable CE faults appear...
 223          *
 224          *      It's a bit tricky, as both NVKM and SVM will need access to
 225          *      the non-replayable fault buffer.
 226          */
 227         .user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
 228 };
 229
 230 int
 231 gv100_fault_new(struct nvkm_device *device, int index,
 232                 struct nvkm_fault **pfault)
 233 {
 234         return nvkm_fault_new_(&gv100_fault, device, index, pfault);
 235 }