drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gt215.c

   1 /*
   2  * Copyright 2013 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  * Authors: Ben Skeggs
  23  */
  24 #include "priv.h"
  25 #include "fuc/gt215.fuc3.h"
  26
  27 #include <subdev/timer.h>
  28
  29 int
  30 gt215_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
  31                u32 process, u32 message, u32 data0, u32 data1)
  32 {
  33         struct nvkm_subdev *subdev = &pmu->subdev;
  34         struct nvkm_device *device = subdev->device;
  35         u32 addr;
  36
  37         mutex_lock(&subdev->mutex);
  38         /* wait for a free slot in the fifo */
  39         addr  = nvkm_rd32(device, 0x10a4a0);
  40         if (nvkm_msec(device, 2000,
  41                 u32 tmp = nvkm_rd32(device, 0x10a4b0);
  42                 if (tmp != (addr ^ 8))
  43                         break;
  44         ) < 0) {
  45                 mutex_unlock(&subdev->mutex);
  46                 return -EBUSY;
  47         }
  48
  49         /* we currently only support a single process at a time waiting
  50          * on a synchronous reply, take the PMU mutex and tell the
  51          * receive handler what we're waiting for
  52          */
  53         if (reply) {
  54                 pmu->recv.message = message;
  55                 pmu->recv.process = process;
  56         }
  57
  58         /* acquire data segment access */
  59         do {
  60                 nvkm_wr32(device, 0x10a580, 0x00000001);
  61         } while (nvkm_rd32(device, 0x10a580) != 0x00000001);
  62
  63         /* write the packet */
  64         nvkm_wr32(device, 0x10a1c0, 0x01000000 | (((addr & 0x07) << 4) +
  65                                 pmu->send.base));
  66         nvkm_wr32(device, 0x10a1c4, process);
  67         nvkm_wr32(device, 0x10a1c4, message);
  68         nvkm_wr32(device, 0x10a1c4, data0);
  69         nvkm_wr32(device, 0x10a1c4, data1);
  70         nvkm_wr32(device, 0x10a4a0, (addr + 1) & 0x0f);
  71
  72         /* release data segment access */
  73         nvkm_wr32(device, 0x10a580, 0x00000000);
  74
  75         /* wait for reply, if requested */
  76         if (reply) {
  77                 wait_event(pmu->recv.wait, (pmu->recv.process == 0));
  78                 reply[0] = pmu->recv.data[0];
  79                 reply[1] = pmu->recv.data[1];
  80         }
  81
  82         mutex_unlock(&subdev->mutex);
  83         return 0;
  84 }
  85
  86 void
  87 gt215_pmu_recv(struct nvkm_pmu *pmu)
  88 {
  89         struct nvkm_subdev *subdev = &pmu->subdev;
  90         struct nvkm_device *device = subdev->device;
  91         u32 process, message, data0, data1;
  92
  93         /* nothing to do if GET == PUT */
  94         u32 addr =  nvkm_rd32(device, 0x10a4cc);
  95         if (addr == nvkm_rd32(device, 0x10a4c8))
  96                 return;
  97
  98         /* acquire data segment access */
  99         do {
 100                 nvkm_wr32(device, 0x10a580, 0x00000002);
 101         } while (nvkm_rd32(device, 0x10a580) != 0x00000002);
 102
 103         /* read the packet */
 104         nvkm_wr32(device, 0x10a1c0, 0x02000000 | (((addr & 0x07) << 4) +
 105                                 pmu->recv.base));
 106         process = nvkm_rd32(device, 0x10a1c4);
 107         message = nvkm_rd32(device, 0x10a1c4);
 108         data0   = nvkm_rd32(device, 0x10a1c4);
 109         data1   = nvkm_rd32(device, 0x10a1c4);
 110         nvkm_wr32(device, 0x10a4cc, (addr + 1) & 0x0f);
 111
 112         /* release data segment access */
 113         nvkm_wr32(device, 0x10a580, 0x00000000);
 114
 115         /* wake process if it's waiting on a synchronous reply */
 116         if (pmu->recv.process) {
 117                 if (process == pmu->recv.process &&
 118                     message == pmu->recv.message) {
 119                         pmu->recv.data[0] = data0;
 120                         pmu->recv.data[1] = data1;
 121                         pmu->recv.process = 0;
 122                         wake_up(&pmu->recv.wait);
 123                         return;
 124                 }
 125         }
 126
 127         /* right now there's no other expected responses from the engine,
 128          * so assume that any unexpected message is an error.
 129          */
 130         nvkm_warn(subdev, "%c%c%c%c %08x %08x %08x %08x\n",
 131                   (char)((process & 0x000000ff) >>  0),
 132                   (char)((process & 0x0000ff00) >>  8),
 133                   (char)((process & 0x00ff0000) >> 16),
 134                   (char)((process & 0xff000000) >> 24),
 135                   process, message, data0, data1);
 136 }
 137
 138 void
 139 gt215_pmu_intr(struct nvkm_pmu *pmu)
 140 {
 141         struct nvkm_subdev *subdev = &pmu->subdev;
 142         struct nvkm_device *device = subdev->device;
 143         u32 disp = nvkm_rd32(device, 0x10a01c);
 144         u32 intr = nvkm_rd32(device, 0x10a008) & disp & ~(disp >> 16);
 145
 146         if (intr & 0x00000020) {
 147                 u32 stat = nvkm_rd32(device, 0x10a16c);
 148                 if (stat & 0x80000000) {
 149                         nvkm_error(subdev, "UAS fault at %06x addr %08x\n",
 150                                    stat & 0x00ffffff,
 151                                    nvkm_rd32(device, 0x10a168));
 152                         nvkm_wr32(device, 0x10a16c, 0x00000000);
 153                         intr &= ~0x00000020;
 154                 }
 155         }
 156
 157         if (intr & 0x00000040) {
 158                 schedule_work(&pmu->recv.work);
 159                 nvkm_wr32(device, 0x10a004, 0x00000040);
 160                 intr &= ~0x00000040;
 161         }
 162
 163         if (intr & 0x00000080) {
 164                 nvkm_info(subdev, "wr32 %06x %08x\n",
 165                           nvkm_rd32(device, 0x10a7a0),
 166                           nvkm_rd32(device, 0x10a7a4));
 167                 nvkm_wr32(device, 0x10a004, 0x00000080);
 168                 intr &= ~0x00000080;
 169         }
 170
 171         if (intr) {
 172                 nvkm_error(subdev, "intr %08x\n", intr);
 173                 nvkm_wr32(device, 0x10a004, intr);
 174         }
 175 }
 176
 177 void
 178 gt215_pmu_fini(struct nvkm_pmu *pmu)
 179 {
 180         nvkm_wr32(pmu->subdev.device, 0x10a014, 0x00000060);
 181 }
 182
 183 static void
 184 gt215_pmu_reset(struct nvkm_pmu *pmu)
 185 {
 186         struct nvkm_device *device = pmu->subdev.device;
 187         nvkm_mask(device, 0x022210, 0x00000001, 0x00000000);
 188         nvkm_mask(device, 0x022210, 0x00000001, 0x00000001);
 189         nvkm_rd32(device, 0x022210);
 190 }
 191
 192 static bool
 193 gt215_pmu_enabled(struct nvkm_pmu *pmu)
 194 {
 195         return nvkm_rd32(pmu->subdev.device, 0x022210) & 0x00000001;
 196 }
 197
 198 int
 199 gt215_pmu_init(struct nvkm_pmu *pmu)
 200 {
 201         struct nvkm_device *device = pmu->subdev.device;
 202         int i;
 203
 204         /* upload data segment */
 205         nvkm_wr32(device, 0x10a1c0, 0x01000000);
 206         for (i = 0; i < pmu->func->data.size / 4; i++)
 207                 nvkm_wr32(device, 0x10a1c4, pmu->func->data.data[i]);
 208
 209         /* upload code segment */
 210         nvkm_wr32(device, 0x10a180, 0x01000000);
 211         for (i = 0; i < pmu->func->code.size / 4; i++) {
 212                 if ((i & 0x3f) == 0)
 213                         nvkm_wr32(device, 0x10a188, i >> 6);
 214                 nvkm_wr32(device, 0x10a184, pmu->func->code.data[i]);
 215         }
 216
 217         /* start it running */
 218         nvkm_wr32(device, 0x10a10c, 0x00000000);
 219         nvkm_wr32(device, 0x10a104, 0x00000000);
 220         nvkm_wr32(device, 0x10a100, 0x00000002);
 221
 222         /* wait for valid host->pmu ring configuration */
 223         if (nvkm_msec(device, 2000,
 224                 if (nvkm_rd32(device, 0x10a4d0))
 225                         break;
 226         ) < 0)
 227                 return -EBUSY;
 228         pmu->send.base = nvkm_rd32(device, 0x10a4d0) & 0x0000ffff;
 229         pmu->send.size = nvkm_rd32(device, 0x10a4d0) >> 16;
 230
 231         /* wait for valid pmu->host ring configuration */
 232         if (nvkm_msec(device, 2000,
 233                 if (nvkm_rd32(device, 0x10a4dc))
 234                         break;
 235         ) < 0)
 236                 return -EBUSY;
 237         pmu->recv.base = nvkm_rd32(device, 0x10a4dc) & 0x0000ffff;
 238         pmu->recv.size = nvkm_rd32(device, 0x10a4dc) >> 16;
 239
 240         nvkm_wr32(device, 0x10a010, 0x000000e0);
 241         return 0;
 242 }
 243
 244 static const struct nvkm_pmu_func
 245 gt215_pmu = {
 246         .code.data = gt215_pmu_code,
 247         .code.size = sizeof(gt215_pmu_code),
 248         .data.data = gt215_pmu_data,
 249         .data.size = sizeof(gt215_pmu_data),
 250         .enabled = gt215_pmu_enabled,
 251         .reset = gt215_pmu_reset,
 252         .init = gt215_pmu_init,
 253         .fini = gt215_pmu_fini,
 254         .intr = gt215_pmu_intr,
 255         .send = gt215_pmu_send,
 256         .recv = gt215_pmu_recv,
 257 };
 258
 259 int
 260 gt215_pmu_new(struct nvkm_device *device, int index, struct nvkm_pmu **ppmu)
 261 {
 262         return nvkm_pmu_new_(&gt215_pmu, device, index, ppmu);
 263 }