mm: hugetlb: fix hugepage memory leak caused by wrong reserve count

[linux/fpc-iii.git] / drivers / gpu / drm / nouveau / nouveau_drm.c

/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include <linux/console.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/vga_switcheroo.h>

#include "drmP.h"
#include "drm_crtc_helper.h"

#include <core/gpuobj.h>
#include <core/option.h>
#include <core/pci.h>
#include <core/tegra.h>

#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_ttm.h"
#include "nouveau_gem.h"
#include "nouveau_vga.h"
#include "nouveau_sysfs.h"
#include "nouveau_hwmon.h"
#include "nouveau_acpi.h"
#include "nouveau_bios.h"
#include "nouveau_ioctl.h"
#include "nouveau_abi16.h"
#include "nouveau_fbcon.h"
#include "nouveau_fence.h"
#include "nouveau_debugfs.h"
#include "nouveau_usif.h"
#include "nouveau_connector.h"
#include "nouveau_platform.h"

MODULE_PARM_DESC(config, "option string to pass to driver core");
static char *nouveau_config;
module_param_named(config, nouveau_config, charp, 0400);

MODULE_PARM_DESC(debug, "debug string to pass to driver core");
static char *nouveau_debug;
module_param_named(debug, nouveau_debug, charp, 0400);

MODULE_PARM_DESC(noaccel, "disable kernel/abi16 acceleration");
static int nouveau_noaccel = 0;
module_param_named(noaccel, nouveau_noaccel, int, 0400);

MODULE_PARM_DESC(modeset, "enable driver (default: auto, "
                          "0 = disabled, 1 = enabled, 2 = headless)");
int nouveau_modeset = -1;
module_param_named(modeset, nouveau_modeset, int, 0400);

MODULE_PARM_DESC(runpm, "disable (0), force enable (1), optimus only default (-1)");
int nouveau_runtime_pm = -1;
module_param_named(runpm, nouveau_runtime_pm, int, 0400);

static struct drm_driver driver_stub;
static struct drm_driver driver_pci;
static struct drm_driver driver_platform;

static u64
nouveau_pci_name(struct pci_dev *pdev)
{
        u64 name = (u64)pci_domain_nr(pdev->bus) << 32;
        name |= pdev->bus->number << 16;
        name |= PCI_SLOT(pdev->devfn) << 8;
        return name | PCI_FUNC(pdev->devfn);
}

static u64
nouveau_platform_name(struct platform_device *platformdev)
{
        return platformdev->id;
}

static u64
nouveau_name(struct drm_device *dev)
{
        if (dev->pdev)
                return nouveau_pci_name(dev->pdev);
        else
                return nouveau_platform_name(dev->platformdev);
}

static int
nouveau_cli_create(struct drm_device *dev, const char *sname,
                   int size, void **pcli)
{
        struct nouveau_cli *cli = *pcli = kzalloc(size, GFP_KERNEL);
        int ret;
        if (cli) {
                snprintf(cli->name, sizeof(cli->name), "%s", sname);
                cli->dev = dev;

                ret = nvif_client_init(NULL, cli->name, nouveau_name(dev),
                                       nouveau_config, nouveau_debug,
                                       &cli->base);
                if (ret == 0) {
                        mutex_init(&cli->mutex);
                        usif_client_init(cli);
                }
                return ret;
        }
        return -ENOMEM;
}

static void
nouveau_cli_destroy(struct nouveau_cli *cli)
{
        nvkm_vm_ref(NULL, &nvxx_client(&cli->base)->vm, NULL);
        nvif_client_fini(&cli->base);
        usif_client_fini(cli);
        kfree(cli);
}

static void
nouveau_accel_fini(struct nouveau_drm *drm)
{
        nouveau_channel_idle(drm->channel);
        nvif_object_fini(&drm->ntfy);
        nvkm_gpuobj_del(&drm->notify);
        nvif_notify_fini(&drm->flip);
        nvif_object_fini(&drm->nvsw);
        nouveau_channel_del(&drm->channel);

        nouveau_channel_idle(drm->cechan);
        nvif_object_fini(&drm->ttm.copy);
        nouveau_channel_del(&drm->cechan);

        if (drm->fence)
                nouveau_fence(drm)->dtor(drm);
}

static void
nouveau_accel_init(struct nouveau_drm *drm)
{
        struct nvif_device *device = &drm->device;
        struct nvif_sclass *sclass;
        u32 arg0, arg1;
        int ret, i, n;

        if (nouveau_noaccel)
                return;

        /* initialise synchronisation routines */
        /*XXX: this is crap, but the fence/channel stuff is a little
         *     backwards in some places.  this will be fixed.
         */
        ret = n = nvif_object_sclass_get(&device->object, &sclass);
        if (ret < 0)
                return;

        for (ret = -ENOSYS, i = 0; i < n; i++) {
                switch (sclass[i].oclass) {
                case NV03_CHANNEL_DMA:
                        ret = nv04_fence_create(drm);
                        break;
                case NV10_CHANNEL_DMA:
                        ret = nv10_fence_create(drm);
                        break;
                case NV17_CHANNEL_DMA:
                case NV40_CHANNEL_DMA:
                        ret = nv17_fence_create(drm);
                        break;
                case NV50_CHANNEL_GPFIFO:
                        ret = nv50_fence_create(drm);
                        break;
                case G82_CHANNEL_GPFIFO:
                        ret = nv84_fence_create(drm);
                        break;
                case FERMI_CHANNEL_GPFIFO:
                case KEPLER_CHANNEL_GPFIFO_A:
                case MAXWELL_CHANNEL_GPFIFO_A:
                        ret = nvc0_fence_create(drm);
                        break;
                default:
                        break;
                }
        }

        nvif_object_sclass_put(&sclass);
        if (ret) {
                NV_ERROR(drm, "failed to initialise sync subsystem, %d\n", ret);
                nouveau_accel_fini(drm);
                return;
        }

        if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
                ret = nouveau_channel_new(drm, &drm->device,
                                          KEPLER_CHANNEL_GPFIFO_A_V0_ENGINE_CE0|
                                          KEPLER_CHANNEL_GPFIFO_A_V0_ENGINE_CE1,
                                          0, &drm->cechan);
                if (ret)
                        NV_ERROR(drm, "failed to create ce channel, %d\n", ret);

                arg0 = KEPLER_CHANNEL_GPFIFO_A_V0_ENGINE_GR;
                arg1 = 1;
        } else
        if (device->info.chipset >= 0xa3 &&
            device->info.chipset != 0xaa &&
            device->info.chipset != 0xac) {
                ret = nouveau_channel_new(drm, &drm->device,
                                          NvDmaFB, NvDmaTT, &drm->cechan);
                if (ret)
                        NV_ERROR(drm, "failed to create ce channel, %d\n", ret);

                arg0 = NvDmaFB;
                arg1 = NvDmaTT;
        } else {
                arg0 = NvDmaFB;
                arg1 = NvDmaTT;
        }

        ret = nouveau_channel_new(drm, &drm->device, arg0, arg1, &drm->channel);
        if (ret) {
                NV_ERROR(drm, "failed to create kernel channel, %d\n", ret);
                nouveau_accel_fini(drm);
                return;
        }

        ret = nvif_object_init(&drm->channel->user, NVDRM_NVSW,
                               nouveau_abi16_swclass(drm), NULL, 0, &drm->nvsw);
        if (ret == 0) {
                ret = RING_SPACE(drm->channel, 2);
                if (ret == 0) {
                        if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
                                BEGIN_NV04(drm->channel, NvSubSw, 0, 1);
                                OUT_RING  (drm->channel, NVDRM_NVSW);
                        } else
                        if (device->info.family < NV_DEVICE_INFO_V0_KEPLER) {
                                BEGIN_NVC0(drm->channel, FermiSw, 0, 1);
                                OUT_RING  (drm->channel, 0x001f0000);
                        }
                }

                ret = nvif_notify_init(&drm->nvsw, nouveau_flip_complete,
                                       false, NVSW_NTFY_UEVENT, NULL, 0, 0,
                                       &drm->flip);
                if (ret == 0)
                        ret = nvif_notify_get(&drm->flip);
                if (ret) {
                        nouveau_accel_fini(drm);
                        return;
                }
        }

        if (ret) {
                NV_ERROR(drm, "failed to allocate software object, %d\n", ret);
                nouveau_accel_fini(drm);
                return;
        }

        if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
                ret = nvkm_gpuobj_new(nvxx_device(&drm->device), 32, 0, false,
                                      NULL, &drm->notify);
                if (ret) {
                        NV_ERROR(drm, "failed to allocate notifier, %d\n", ret);
                        nouveau_accel_fini(drm);
                        return;
                }

                ret = nvif_object_init(&drm->channel->user, NvNotify0,
                                       NV_DMA_IN_MEMORY,
                                       &(struct nv_dma_v0) {
                                                .target = NV_DMA_V0_TARGET_VRAM,
                                                .access = NV_DMA_V0_ACCESS_RDWR,
                                                .start = drm->notify->addr,
                                                .limit = drm->notify->addr + 31
                                       }, sizeof(struct nv_dma_v0),
                                       &drm->ntfy);
                if (ret) {
                        nouveau_accel_fini(drm);
                        return;
                }
        }


        nouveau_bo_move_init(drm);
}

static int nouveau_drm_probe(struct pci_dev *pdev,
                             const struct pci_device_id *pent)
{
        struct nvkm_device *device;
        struct apertures_struct *aper;
        bool boot = false;
        int ret;

        /* remove conflicting drivers (vesafb, efifb etc) */
        aper = alloc_apertures(3);
        if (!aper)
                return -ENOMEM;

        aper->ranges[0].base = pci_resource_start(pdev, 1);
        aper->ranges[0].size = pci_resource_len(pdev, 1);
        aper->count = 1;

        if (pci_resource_len(pdev, 2)) {
                aper->ranges[aper->count].base = pci_resource_start(pdev, 2);
                aper->ranges[aper->count].size = pci_resource_len(pdev, 2);
                aper->count++;
        }

        if (pci_resource_len(pdev, 3)) {
                aper->ranges[aper->count].base = pci_resource_start(pdev, 3);
                aper->ranges[aper->count].size = pci_resource_len(pdev, 3);
                aper->count++;
        }

#ifdef CONFIG_X86
        boot = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
#endif
        if (nouveau_modeset != 2)
                remove_conflicting_framebuffers(aper, "nouveaufb", boot);
        kfree(aper);

        ret = nvkm_device_pci_new(pdev, nouveau_config, nouveau_debug,
                                  true, true, ~0ULL, &device);
        if (ret)
                return ret;

        pci_set_master(pdev);

        ret = drm_get_pci_dev(pdev, pent, &driver_pci);
        if (ret) {
                nvkm_device_del(&device);
                return ret;
        }

        return 0;
}

#define PCI_CLASS_MULTIMEDIA_HD_AUDIO 0x0403

static void
nouveau_get_hdmi_dev(struct nouveau_drm *drm)
{
        struct pci_dev *pdev = drm->dev->pdev;

        if (!pdev) {
                DRM_INFO("not a PCI device; no HDMI\n");
                drm->hdmi_device = NULL;
                return;
        }

        /* subfunction one is a hdmi audio device? */
        drm->hdmi_device = pci_get_bus_and_slot((unsigned int)pdev->bus->number,
                                                PCI_DEVFN(PCI_SLOT(pdev->devfn), 1));

        if (!drm->hdmi_device) {
                NV_DEBUG(drm, "hdmi device not found %d %d %d\n", pdev->bus->number, PCI_SLOT(pdev->devfn), 1);
                return;
        }

        if ((drm->hdmi_device->class >> 8) != PCI_CLASS_MULTIMEDIA_HD_AUDIO) {
                NV_DEBUG(drm, "possible hdmi device not audio %d\n", drm->hdmi_device->class);
                pci_dev_put(drm->hdmi_device);
                drm->hdmi_device = NULL;
                return;
        }
}

static int
nouveau_drm_load(struct drm_device *dev, unsigned long flags)
{
        struct nouveau_drm *drm;
        int ret;

        ret = nouveau_cli_create(dev, "DRM", sizeof(*drm), (void **)&drm);
        if (ret)
                return ret;

        dev->dev_private = drm;
        drm->dev = dev;
        nvxx_client(&drm->client.base)->debug =
                nvkm_dbgopt(nouveau_debug, "DRM");

        INIT_LIST_HEAD(&drm->clients);
        spin_lock_init(&drm->tile.lock);

        nouveau_get_hdmi_dev(drm);

        ret = nvif_device_init(&drm->client.base.object, 0, NV_DEVICE,
                               &(struct nv_device_v0) {
                                        .device = ~0,
                               }, sizeof(struct nv_device_v0),
                               &drm->device);
        if (ret)
                goto fail_device;

        dev->irq_enabled = true;

        /* workaround an odd issue on nvc1 by disabling the device's
         * nosnoop capability.  hopefully won't cause issues until a
         * better fix is found - assuming there is one...
         */
        if (drm->device.info.chipset == 0xc1)
                nvif_mask(&drm->device.object, 0x00088080, 0x00000800, 0x00000000);

        nouveau_vga_init(drm);

        if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
                ret = nvkm_vm_new(nvxx_device(&drm->device), 0, (1ULL << 40),
                                  0x1000, NULL, &drm->client.vm);
                if (ret)
                        goto fail_device;

                nvxx_client(&drm->client.base)->vm = drm->client.vm;
        }

        ret = nouveau_ttm_init(drm);
        if (ret)
                goto fail_ttm;

        ret = nouveau_bios_init(dev);
        if (ret)
                goto fail_bios;

        ret = nouveau_display_create(dev);
        if (ret)
                goto fail_dispctor;

        if (dev->mode_config.num_crtc) {
                ret = nouveau_display_init(dev);
                if (ret)
                        goto fail_dispinit;
        }

        nouveau_sysfs_init(dev);
        nouveau_hwmon_init(dev);
        nouveau_accel_init(drm);
        nouveau_fbcon_init(dev);

        if (nouveau_runtime_pm != 0) {
                pm_runtime_use_autosuspend(dev->dev);
                pm_runtime_set_autosuspend_delay(dev->dev, 5000);
                pm_runtime_set_active(dev->dev);
                pm_runtime_allow(dev->dev);
                pm_runtime_mark_last_busy(dev->dev);
                pm_runtime_put(dev->dev);
        }
        return 0;

fail_dispinit:
        nouveau_display_destroy(dev);
fail_dispctor:
        nouveau_bios_takedown(dev);
fail_bios:
        nouveau_ttm_fini(drm);
fail_ttm:
        nouveau_vga_fini(drm);
fail_device:
        nvif_device_fini(&drm->device);
        nouveau_cli_destroy(&drm->client);
        return ret;
}

static int
nouveau_drm_unload(struct drm_device *dev)
{
        struct nouveau_drm *drm = nouveau_drm(dev);

        pm_runtime_get_sync(dev->dev);
        nouveau_fbcon_fini(dev);
        nouveau_accel_fini(drm);
        nouveau_hwmon_fini(dev);
        nouveau_sysfs_fini(dev);

        if (dev->mode_config.num_crtc)
                nouveau_display_fini(dev);
        nouveau_display_destroy(dev);

        nouveau_bios_takedown(dev);

        nouveau_ttm_fini(drm);
        nouveau_vga_fini(drm);

        nvif_device_fini(&drm->device);
        if (drm->hdmi_device)
                pci_dev_put(drm->hdmi_device);
        nouveau_cli_destroy(&drm->client);
        return 0;
}

void
nouveau_drm_device_remove(struct drm_device *dev)
{
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nvkm_client *client;
        struct nvkm_device *device;

        dev->irq_enabled = false;
        client = nvxx_client(&drm->client.base);
        device = nvkm_device_find(client->device);
        drm_put_dev(dev);

        nvkm_device_del(&device);
}

static void
nouveau_drm_remove(struct pci_dev *pdev)
{
        struct drm_device *dev = pci_get_drvdata(pdev);

        nouveau_drm_device_remove(dev);
}

static int
nouveau_do_suspend(struct drm_device *dev, bool runtime)
{
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nouveau_cli *cli;
        int ret;

        if (dev->mode_config.num_crtc) {
                NV_INFO(drm, "suspending console...\n");
                nouveau_fbcon_set_suspend(dev, 1);
                NV_INFO(drm, "suspending display...\n");
                ret = nouveau_display_suspend(dev, runtime);
                if (ret)
                        return ret;
        }

        NV_INFO(drm, "evicting buffers...\n");
        ttm_bo_evict_mm(&drm->ttm.bdev, TTM_PL_VRAM);

        NV_INFO(drm, "waiting for kernel channels to go idle...\n");
        if (drm->cechan) {
                ret = nouveau_channel_idle(drm->cechan);
                if (ret)
                        goto fail_display;
        }

        if (drm->channel) {
                ret = nouveau_channel_idle(drm->channel);
                if (ret)
                        goto fail_display;
        }

        NV_INFO(drm, "suspending client object trees...\n");
        if (drm->fence && nouveau_fence(drm)->suspend) {
                if (!nouveau_fence(drm)->suspend(drm)) {
                        ret = -ENOMEM;
                        goto fail_display;
                }
        }

        list_for_each_entry(cli, &drm->clients, head) {
                ret = nvif_client_suspend(&cli->base);
                if (ret)
                        goto fail_client;
        }

        NV_INFO(drm, "suspending kernel object tree...\n");
        ret = nvif_client_suspend(&drm->client.base);
        if (ret)
                goto fail_client;

        return 0;

fail_client:
        list_for_each_entry_continue_reverse(cli, &drm->clients, head) {
                nvif_client_resume(&cli->base);
        }

        if (drm->fence && nouveau_fence(drm)->resume)
                nouveau_fence(drm)->resume(drm);

fail_display:
        if (dev->mode_config.num_crtc) {
                NV_INFO(drm, "resuming display...\n");
                nouveau_display_resume(dev, runtime);
        }
        return ret;
}

static int
nouveau_do_resume(struct drm_device *dev, bool runtime)
{
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nouveau_cli *cli;

        NV_INFO(drm, "resuming kernel object tree...\n");
        nvif_client_resume(&drm->client.base);

        NV_INFO(drm, "resuming client object trees...\n");
        if (drm->fence && nouveau_fence(drm)->resume)
                nouveau_fence(drm)->resume(drm);

        list_for_each_entry(cli, &drm->clients, head) {
                nvif_client_resume(&cli->base);
        }

        nouveau_run_vbios_init(dev);

        if (dev->mode_config.num_crtc) {
                NV_INFO(drm, "resuming display...\n");
                nouveau_display_resume(dev, runtime);
                NV_INFO(drm, "resuming console...\n");
                nouveau_fbcon_set_suspend(dev, 0);
        }

        return 0;
}

int
nouveau_pmops_suspend(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        int ret;

        if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
            drm_dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
                return 0;

        ret = nouveau_do_suspend(drm_dev, false);
        if (ret)
                return ret;

        pci_save_state(pdev);
        pci_disable_device(pdev);
        pci_set_power_state(pdev, PCI_D3hot);
        udelay(200);
        return 0;
}

int
nouveau_pmops_resume(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        int ret;

        if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
            drm_dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
                return 0;

        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);
        ret = pci_enable_device(pdev);
        if (ret)
                return ret;
        pci_set_master(pdev);

        return nouveau_do_resume(drm_dev, false);
}

static int
nouveau_pmops_freeze(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        return nouveau_do_suspend(drm_dev, false);
}

static int
nouveau_pmops_thaw(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        return nouveau_do_resume(drm_dev, false);
}

static int
nouveau_pmops_runtime_suspend(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        int ret;

        if (nouveau_runtime_pm == 0) {
                pm_runtime_forbid(dev);
                return -EBUSY;
        }

        /* are we optimus enabled? */
        if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
                DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
                pm_runtime_forbid(dev);
                return -EBUSY;
        }

        drm_kms_helper_poll_disable(drm_dev);
        vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_OFF);
        nouveau_switcheroo_optimus_dsm();
        ret = nouveau_do_suspend(drm_dev, true);
        pci_save_state(pdev);
        pci_disable_device(pdev);
        pci_ignore_hotplug(pdev);
        pci_set_power_state(pdev, PCI_D3cold);
        drm_dev->switch_power_state = DRM_SWITCH_POWER_DYNAMIC_OFF;
        return ret;
}

static int
nouveau_pmops_runtime_resume(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        struct nvif_device *device = &nouveau_drm(drm_dev)->device;
        int ret;

        if (nouveau_runtime_pm == 0)
                return -EINVAL;

        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);
        ret = pci_enable_device(pdev);
        if (ret)
                return ret;
        pci_set_master(pdev);

        ret = nouveau_do_resume(drm_dev, true);
        drm_kms_helper_poll_enable(drm_dev);
        /* do magic */
        nvif_mask(&device->object, 0x088488, (1 << 25), (1 << 25));
        vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_ON);
        drm_dev->switch_power_state = DRM_SWITCH_POWER_ON;
        return ret;
}

static int
nouveau_pmops_runtime_idle(struct device *dev)
{
        struct pci_dev *pdev = to_pci_dev(dev);
        struct drm_device *drm_dev = pci_get_drvdata(pdev);
        struct nouveau_drm *drm = nouveau_drm(drm_dev);
        struct drm_crtc *crtc;

        if (nouveau_runtime_pm == 0) {
                pm_runtime_forbid(dev);
                return -EBUSY;
        }

        /* are we optimus enabled? */
        if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
                DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
                pm_runtime_forbid(dev);
                return -EBUSY;
        }

        /* if we have a hdmi audio device - make sure it has a driver loaded */
        if (drm->hdmi_device) {
                if (!drm->hdmi_device->driver) {
                        DRM_DEBUG_DRIVER("failing to power off - no HDMI audio driver loaded\n");
                        pm_runtime_mark_last_busy(dev);
                        return -EBUSY;
                }
        }

        list_for_each_entry(crtc, &drm->dev->mode_config.crtc_list, head) {
                if (crtc->enabled) {
                        DRM_DEBUG_DRIVER("failing to power off - crtc active\n");
                        return -EBUSY;
                }
        }
        pm_runtime_mark_last_busy(dev);
        pm_runtime_autosuspend(dev);
        /* we don't want the main rpm_idle to call suspend - we want to autosuspend */
        return 1;
}

static int
nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv)
{
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nouveau_cli *cli;
        char name[32], tmpname[TASK_COMM_LEN];
        int ret;

        /* need to bring up power immediately if opening device */
        ret = pm_runtime_get_sync(dev->dev);
        if (ret < 0 && ret != -EACCES)
                return ret;

        get_task_comm(tmpname, current);
        snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid));

        ret = nouveau_cli_create(dev, name, sizeof(*cli), (void **)&cli);

        if (ret)
                goto out_suspend;

        cli->base.super = false;

        if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
                ret = nvkm_vm_new(nvxx_device(&drm->device), 0, (1ULL << 40),
                                  0x1000, NULL, &cli->vm);
                if (ret) {
                        nouveau_cli_destroy(cli);
                        goto out_suspend;
                }

                nvxx_client(&cli->base)->vm = cli->vm;
        }

        fpriv->driver_priv = cli;

        mutex_lock(&drm->client.mutex);
        list_add(&cli->head, &drm->clients);
        mutex_unlock(&drm->client.mutex);

out_suspend:
        pm_runtime_mark_last_busy(dev->dev);
        pm_runtime_put_autosuspend(dev->dev);

        return ret;
}

static void
nouveau_drm_preclose(struct drm_device *dev, struct drm_file *fpriv)
{
        struct nouveau_cli *cli = nouveau_cli(fpriv);
        struct nouveau_drm *drm = nouveau_drm(dev);

        pm_runtime_get_sync(dev->dev);

        mutex_lock(&cli->mutex);
        if (cli->abi16)
                nouveau_abi16_fini(cli->abi16);
        mutex_unlock(&cli->mutex);

        mutex_lock(&drm->client.mutex);
        list_del(&cli->head);
        mutex_unlock(&drm->client.mutex);

}

static void
nouveau_drm_postclose(struct drm_device *dev, struct drm_file *fpriv)
{
        struct nouveau_cli *cli = nouveau_cli(fpriv);
        nouveau_cli_destroy(cli);
        pm_runtime_mark_last_busy(dev->dev);
        pm_runtime_put_autosuspend(dev->dev);
}

static const struct drm_ioctl_desc
nouveau_ioctls[] = {
        DRM_IOCTL_DEF_DRV(NOUVEAU_GETPARAM, nouveau_abi16_ioctl_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_SETPARAM, nouveau_abi16_ioctl_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
        DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_ALLOC, nouveau_abi16_ioctl_channel_alloc, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_FREE, nouveau_abi16_ioctl_channel_free, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GROBJ_ALLOC, nouveau_abi16_ioctl_grobj_alloc, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_NOTIFIEROBJ_ALLOC, nouveau_abi16_ioctl_notifierobj_alloc, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GPUOBJ_FREE, nouveau_abi16_ioctl_gpuobj_free, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_NEW, nouveau_gem_ioctl_new, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_PUSHBUF, nouveau_gem_ioctl_pushbuf, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
        DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_AUTH|DRM_RENDER_ALLOW),
};

long
nouveau_drm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
        struct drm_file *filp = file->private_data;
        struct drm_device *dev = filp->minor->dev;
        long ret;

        ret = pm_runtime_get_sync(dev->dev);
        if (ret < 0 && ret != -EACCES)
                return ret;

        switch (_IOC_NR(cmd) - DRM_COMMAND_BASE) {
        case DRM_NOUVEAU_NVIF:
                ret = usif_ioctl(filp, (void __user *)arg, _IOC_SIZE(cmd));
                break;
        default:
                ret = drm_ioctl(file, cmd, arg);
                break;
        }

        pm_runtime_mark_last_busy(dev->dev);
        pm_runtime_put_autosuspend(dev->dev);
        return ret;
}

static const struct file_operations
nouveau_driver_fops = {
        .owner = THIS_MODULE,
        .open = drm_open,
        .release = drm_release,
        .unlocked_ioctl = nouveau_drm_ioctl,
        .mmap = nouveau_ttm_mmap,
        .poll = drm_poll,
        .read = drm_read,
#if defined(CONFIG_COMPAT)
        .compat_ioctl = nouveau_compat_ioctl,
#endif
        .llseek = noop_llseek,
};

static struct drm_driver
driver_stub = {
        .driver_features =
                DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER |
                DRIVER_KMS_LEGACY_CONTEXT,

        .load = nouveau_drm_load,
        .unload = nouveau_drm_unload,
        .open = nouveau_drm_open,
        .preclose = nouveau_drm_preclose,
        .postclose = nouveau_drm_postclose,
        .lastclose = nouveau_vga_lastclose,

#if defined(CONFIG_DEBUG_FS)
        .debugfs_init = nouveau_debugfs_init,
        .debugfs_cleanup = nouveau_debugfs_takedown,
#endif

        .get_vblank_counter = drm_vblank_no_hw_counter,
        .enable_vblank = nouveau_display_vblank_enable,
        .disable_vblank = nouveau_display_vblank_disable,
        .get_scanout_position = nouveau_display_scanoutpos,
        .get_vblank_timestamp = nouveau_display_vblstamp,

        .ioctls = nouveau_ioctls,
        .num_ioctls = ARRAY_SIZE(nouveau_ioctls),
        .fops = &nouveau_driver_fops,

        .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
        .gem_prime_export = drm_gem_prime_export,
        .gem_prime_import = drm_gem_prime_import,
        .gem_prime_pin = nouveau_gem_prime_pin,
        .gem_prime_res_obj = nouveau_gem_prime_res_obj,
        .gem_prime_unpin = nouveau_gem_prime_unpin,
        .gem_prime_get_sg_table = nouveau_gem_prime_get_sg_table,
        .gem_prime_import_sg_table = nouveau_gem_prime_import_sg_table,
        .gem_prime_vmap = nouveau_gem_prime_vmap,
        .gem_prime_vunmap = nouveau_gem_prime_vunmap,

        .gem_free_object = nouveau_gem_object_del,
        .gem_open_object = nouveau_gem_object_open,
        .gem_close_object = nouveau_gem_object_close,

        .dumb_create = nouveau_display_dumb_create,
        .dumb_map_offset = nouveau_display_dumb_map_offset,
        .dumb_destroy = drm_gem_dumb_destroy,

        .name = DRIVER_NAME,
        .desc = DRIVER_DESC,
#ifdef GIT_REVISION
        .date = GIT_REVISION,
#else
        .date = DRIVER_DATE,
#endif
        .major = DRIVER_MAJOR,
        .minor = DRIVER_MINOR,
        .patchlevel = DRIVER_PATCHLEVEL,
};

static struct pci_device_id
nouveau_drm_pci_table[] = {
        {
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID),
                .class = PCI_BASE_CLASS_DISPLAY << 16,
                .class_mask  = 0xff << 16,
        },
        {
                PCI_DEVICE(PCI_VENDOR_ID_NVIDIA_SGS, PCI_ANY_ID),
                .class = PCI_BASE_CLASS_DISPLAY << 16,
                .class_mask  = 0xff << 16,
        },
        {}
};

static void nouveau_display_options(void)
{
        DRM_DEBUG_DRIVER("Loading Nouveau with parameters:\n");

        DRM_DEBUG_DRIVER("... tv_disable   : %d\n", nouveau_tv_disable);
        DRM_DEBUG_DRIVER("... ignorelid    : %d\n", nouveau_ignorelid);
        DRM_DEBUG_DRIVER("... duallink     : %d\n", nouveau_duallink);
        DRM_DEBUG_DRIVER("... nofbaccel    : %d\n", nouveau_nofbaccel);
        DRM_DEBUG_DRIVER("... config       : %s\n", nouveau_config);
        DRM_DEBUG_DRIVER("... debug        : %s\n", nouveau_debug);
        DRM_DEBUG_DRIVER("... noaccel      : %d\n", nouveau_noaccel);
        DRM_DEBUG_DRIVER("... modeset      : %d\n", nouveau_modeset);
        DRM_DEBUG_DRIVER("... runpm        : %d\n", nouveau_runtime_pm);
        DRM_DEBUG_DRIVER("... vram_pushbuf : %d\n", nouveau_vram_pushbuf);
        DRM_DEBUG_DRIVER("... pstate       : %d\n", nouveau_pstate);
}

static const struct dev_pm_ops nouveau_pm_ops = {
        .suspend = nouveau_pmops_suspend,
        .resume = nouveau_pmops_resume,
        .freeze = nouveau_pmops_freeze,
        .thaw = nouveau_pmops_thaw,
        .poweroff = nouveau_pmops_freeze,
        .restore = nouveau_pmops_resume,
        .runtime_suspend = nouveau_pmops_runtime_suspend,
        .runtime_resume = nouveau_pmops_runtime_resume,
        .runtime_idle = nouveau_pmops_runtime_idle,
};

static struct pci_driver
nouveau_drm_pci_driver = {
        .name = "nouveau",
        .id_table = nouveau_drm_pci_table,
        .probe = nouveau_drm_probe,
        .remove = nouveau_drm_remove,
        .driver.pm = &nouveau_pm_ops,
};

struct drm_device *
nouveau_platform_device_create(const struct nvkm_device_tegra_func *func,
                               struct platform_device *pdev,
                               struct nvkm_device **pdevice)
{
        struct drm_device *drm;
        int err;

        err = nvkm_device_tegra_new(func, pdev, nouveau_config, nouveau_debug,
                                    true, true, ~0ULL, pdevice);
        if (err)
                goto err_free;

        drm = drm_dev_alloc(&driver_platform, &pdev->dev);
        if (!drm) {
                err = -ENOMEM;
                goto err_free;
        }

        err = drm_dev_set_unique(drm, "%s", dev_name(&pdev->dev));
        if (err < 0)
                goto err_free;

        drm->platformdev = pdev;
        platform_set_drvdata(pdev, drm);

        return drm;

err_free:
        nvkm_device_del(pdevice);

        return ERR_PTR(err);
}

static int __init
nouveau_drm_init(void)
{
        driver_pci = driver_stub;
        driver_pci.set_busid = drm_pci_set_busid;
        driver_platform = driver_stub;
        driver_platform.set_busid = drm_platform_set_busid;

        nouveau_display_options();

        if (nouveau_modeset == -1) {
#ifdef CONFIG_VGA_CONSOLE
                if (vgacon_text_force())
                        nouveau_modeset = 0;
#endif
        }

        if (!nouveau_modeset)
                return 0;

#ifdef CONFIG_NOUVEAU_PLATFORM_DRIVER
        platform_driver_register(&nouveau_platform_driver);
#endif

        nouveau_register_dsm_handler();
        return drm_pci_init(&driver_pci, &nouveau_drm_pci_driver);
}

static void __exit
nouveau_drm_exit(void)
{
        if (!nouveau_modeset)
                return;

        drm_pci_exit(&driver_pci, &nouveau_drm_pci_driver);
        nouveau_unregister_dsm_handler();

#ifdef CONFIG_NOUVEAU_PLATFORM_DRIVER
        platform_driver_unregister(&nouveau_platform_driver);
#endif
}

module_init(nouveau_drm_init);
module_exit(nouveau_drm_exit);

MODULE_DEVICE_TABLE(pci, nouveau_drm_pci_table);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");