drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.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
  26 #include <core/msgqueue.h>
  27 #include <subdev/timer.h>
  28
  29 void
  30 nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
  31 {
  32         if (pmu && pmu->func->pgob)
  33                 pmu->func->pgob(pmu, enable);
  34 }
  35
  36 static void
  37 nvkm_pmu_recv(struct work_struct *work)
  38 {
  39         struct nvkm_pmu *pmu = container_of(work, typeof(*pmu), recv.work);
  40         return pmu->func->recv(pmu);
  41 }
  42
  43 int
  44 nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
  45               u32 process, u32 message, u32 data0, u32 data1)
  46 {
  47         if (!pmu || !pmu->func->send)
  48                 return -ENODEV;
  49         return pmu->func->send(pmu, reply, process, message, data0, data1);
  50 }
  51
  52 static void
  53 nvkm_pmu_intr(struct nvkm_subdev *subdev)
  54 {
  55         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
  56         if (!pmu->func->intr)
  57                 return;
  58         pmu->func->intr(pmu);
  59 }
  60
  61 static int
  62 nvkm_pmu_fini(struct nvkm_subdev *subdev, bool suspend)
  63 {
  64         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
  65
  66         if (pmu->func->fini)
  67                 pmu->func->fini(pmu);
  68
  69         flush_work(&pmu->recv.work);
  70         return 0;
  71 }
  72
  73 static int
  74 nvkm_pmu_reset(struct nvkm_pmu *pmu)
  75 {
  76         struct nvkm_device *device = pmu->subdev.device;
  77
  78         if (!pmu->func->enabled(pmu))
  79                 return 0;
  80
  81         /* Inhibit interrupts, and wait for idle. */
  82         nvkm_wr32(device, 0x10a014, 0x0000ffff);
  83         nvkm_msec(device, 2000,
  84                 if (!nvkm_rd32(device, 0x10a04c))
  85                         break;
  86         );
  87
  88         /* Reset. */
  89         if (pmu->func->reset)
  90                 pmu->func->reset(pmu);
  91
  92         /* Wait for IMEM/DMEM scrubbing to be complete. */
  93         nvkm_msec(device, 2000,
  94                 if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006))
  95                         break;
  96         );
  97
  98         return 0;
  99 }
 100
 101 static int
 102 nvkm_pmu_preinit(struct nvkm_subdev *subdev)
 103 {
 104         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
 105         return nvkm_pmu_reset(pmu);
 106 }
 107
 108 static int
 109 nvkm_pmu_init(struct nvkm_subdev *subdev)
 110 {
 111         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
 112         int ret = nvkm_pmu_reset(pmu);
 113         if (ret == 0 && pmu->func->init)
 114                 ret = pmu->func->init(pmu);
 115         return ret;
 116 }
 117
 118 static int
 119 nvkm_pmu_oneinit(struct nvkm_subdev *subdev)
 120 {
 121         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
 122         return nvkm_falcon_v1_new(&pmu->subdev, "PMU", 0x10a000, &pmu->falcon);
 123 }
 124
 125 static void *
 126 nvkm_pmu_dtor(struct nvkm_subdev *subdev)
 127 {
 128         struct nvkm_pmu *pmu = nvkm_pmu(subdev);
 129         nvkm_msgqueue_del(&pmu->queue);
 130         nvkm_falcon_del(&pmu->falcon);
 131         return nvkm_pmu(subdev);
 132 }
 133
 134 static const struct nvkm_subdev_func
 135 nvkm_pmu = {
 136         .dtor = nvkm_pmu_dtor,
 137         .preinit = nvkm_pmu_preinit,
 138         .oneinit = nvkm_pmu_oneinit,
 139         .init = nvkm_pmu_init,
 140         .fini = nvkm_pmu_fini,
 141         .intr = nvkm_pmu_intr,
 142 };
 143
 144 int
 145 nvkm_pmu_ctor(const struct nvkm_pmu_func *func, struct nvkm_device *device,
 146               int index, struct nvkm_pmu *pmu)
 147 {
 148         nvkm_subdev_ctor(&nvkm_pmu, device, index, &pmu->subdev);
 149         pmu->func = func;
 150         INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
 151         init_waitqueue_head(&pmu->recv.wait);
 152         return 0;
 153 }
 154
 155 int
 156 nvkm_pmu_new_(const struct nvkm_pmu_func *func, struct nvkm_device *device,
 157               int index, struct nvkm_pmu **ppmu)
 158 {
 159         struct nvkm_pmu *pmu;
 160         if (!(pmu = *ppmu = kzalloc(sizeof(*pmu), GFP_KERNEL)))
 161                 return -ENOMEM;
 162         return nvkm_pmu_ctor(func, device, index, *ppmu);
 163 }