LXR linux/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
  29void
  30nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
  31{
  32        if (pmu && pmu->func->pgob)
  33                pmu->func->pgob(pmu, enable);
  34}
  35
  36static void
  37nvkm_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
  43int
  44nvkm_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
  52static void
  53nvkm_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
  61static int
  62nvkm_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
  73static int
  74nvkm_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
 101static int
 102nvkm_pmu_preinit(struct nvkm_subdev *subdev)
 103{
 104        struct nvkm_pmu *pmu = nvkm_pmu(subdev);
 105        return nvkm_pmu_reset(pmu);
 106}
 107
 108static int
 109nvkm_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
 118static int
 119nvkm_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
 125static void *
 126nvkm_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
 134static const struct nvkm_subdev_func
 135nvkm_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
 144int
 145nvkm_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
 155int
 156nvkm_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}
 164