nouveau_drm.c

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/*
 * 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/module.h>
#include <linux/pci.h>

#include <core/device.h>
#include <core/client.h>
#include <core/gpuobj.h>
#include <core/class.h>

#include <subdev/device.h>
#include <subdev/vm.h>

#include "nouveau_drm.h"
#include "nouveau_irq.h"
#include "nouveau_dma.h"
#include "nouveau_ttm.h"
#include "nouveau_gem.h"
#include "nouveau_agp.h"
#include "nouveau_vga.h"
#include "nouveau_pm.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_ttm.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);

static struct drm_driver driver;

static u64
nouveau_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 int
nouveau_cli_create(struct pci_dev *pdev, const char *name,
           int size, void **pcli)
{
    struct nouveau_cli *cli;
    int ret;

    ret = nouveau_client_create_(name, nouveau_name(pdev), nouveau_config,
                     nouveau_debug, size, pcli);
    cli = *pcli;
    if (ret)
        return ret;

    mutex_init(&cli->mutex);
    return 0;
}

static void
nouveau_cli_destroy(struct nouveau_cli *cli)
{
    struct nouveau_object *client = nv_object(cli);
    nouveau_vm_ref(NULL, &cli->base.vm, NULL);
    nouveau_client_fini(&cli->base, false);
    atomic_set(&client->refcount, 1);
    nouveau_object_ref(NULL, &client);
}

static void
nouveau_accel_fini(struct nouveau_drm *drm)
{
    nouveau_gpuobj_ref(NULL, &drm->notify);
    nouveau_channel_del(&drm->channel);
    nouveau_channel_del(&drm->cechan);
    if (drm->fence)
        nouveau_fence(drm)->dtor(drm);
}

static void
nouveau_accel_init(struct nouveau_drm *drm)
{
    struct nouveau_device *device = nv_device(drm->device);
    struct nouveau_object *object;
    u32 arg0, arg1;
    int ret;

    if (nouveau_noaccel)
        return;

    /* initialise synchronisation routines */
    if      (device->card_type < NV_10) ret = nv04_fence_create(drm);
    else if (device->card_type < NV_50) ret = nv10_fence_create(drm);
    else if (device->chipset   <  0x84) ret = nv50_fence_create(drm);
    else if (device->card_type < NV_C0) ret = nv84_fence_create(drm);
    else                                ret = nvc0_fence_create(drm);
    if (ret) {
        NV_ERROR(drm, "failed to initialise sync subsystem, %d\n", ret);
        nouveau_accel_fini(drm);
        return;
    }

    if (device->card_type >= NV_E0) {
        ret = nouveau_channel_new(drm, &drm->client, NVDRM_DEVICE,
                      NVDRM_CHAN + 1,
                      NVE0_CHANNEL_IND_ENGINE_CE0 |
                      NVE0_CHANNEL_IND_ENGINE_CE1, 0,
                      &drm->cechan);
        if (ret)
            NV_ERROR(drm, "failed to create ce channel, %d\n", ret);

        arg0 = NVE0_CHANNEL_IND_ENGINE_GR;
        arg1 = 0;
    } else {
        arg0 = NvDmaFB;
        arg1 = NvDmaTT;
    }

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

    if (device->card_type < NV_C0) {
        ret = nouveau_gpuobj_new(drm->device, NULL, 32, 0, 0,
                    &drm->notify);
        if (ret) {
            NV_ERROR(drm, "failed to allocate notifier, %d\n", ret);
            nouveau_accel_fini(drm);
            return;
        }

        ret = nouveau_object_new(nv_object(drm),
                     drm->channel->handle, NvNotify0,
                     0x003d, &(struct nv_dma_class) {
                        .flags = NV_DMA_TARGET_VRAM |
                             NV_DMA_ACCESS_RDWR,
                        .start = drm->notify->addr,
                        .limit = drm->notify->addr + 31
                        }, sizeof(struct nv_dma_class),
                     &object);
        if (ret) {
            nouveau_accel_fini(drm);
            return;
        }
    }


    nouveau_bo_move_init(drm);
}

static int __devinit
nouveau_drm_probe(struct pci_dev *pdev, const struct pci_device_id *pent)
{
    struct nouveau_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
    remove_conflicting_framebuffers(aper, "nouveaufb", boot);

    ret = nouveau_device_create(pdev, nouveau_name(pdev), pci_name(pdev),
                    nouveau_config, nouveau_debug, &device);
    if (ret)
        return ret;

    pci_set_master(pdev);

    ret = drm_get_pci_dev(pdev, pent, &driver);
    if (ret) {
        nouveau_object_ref(NULL, (struct nouveau_object **)&device);
        return ret;
    }

    return 0;
}

static int
nouveau_drm_load(struct drm_device *dev, unsigned long flags)
{
    struct pci_dev *pdev = dev->pdev;
    struct nouveau_device *device;
    struct nouveau_drm *drm;
    int ret;

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

    dev->dev_private = drm;
    drm->dev = dev;

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

    /* make sure AGP controller is in a consistent state before we
     * (possibly) execute vbios init tables (see nouveau_agp.h)
     */
    if (drm_pci_device_is_agp(dev) && dev->agp) {
        /* dummy device object, doesn't init anything, but allows
         * agp code access to registers
         */
        ret = nouveau_object_new(nv_object(drm), NVDRM_CLIENT,
                     NVDRM_DEVICE, 0x0080,
                     &(struct nv_device_class) {
                        .device = ~0,
                        .disable =
                         ~(NV_DEVICE_DISABLE_MMIO |
                           NV_DEVICE_DISABLE_IDENTIFY),
                        .debug0 = ~0,
                     }, sizeof(struct nv_device_class),
                     &drm->device);
        if (ret)
            goto fail_device;

        nouveau_agp_reset(drm);
        nouveau_object_del(nv_object(drm), NVDRM_CLIENT, NVDRM_DEVICE);
    }

    ret = nouveau_object_new(nv_object(drm), NVDRM_CLIENT, NVDRM_DEVICE,
                 0x0080, &(struct nv_device_class) {
                    .device = ~0,
                    .disable = 0,
                    .debug0 = 0,
                 }, sizeof(struct nv_device_class),
                 &drm->device);
    if (ret)
        goto fail_device;

    /* 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...
     */
    device = nv_device(drm->device);
    if (nv_device(drm->device)->chipset == 0xc1)
        nv_mask(device, 0x00088080, 0x00000800, 0x00000000);

    nouveau_vga_init(drm);
    nouveau_agp_init(drm);

    if (device->card_type >= NV_50) {
        ret = nouveau_vm_new(nv_device(drm->device), 0, (1ULL << 40),
                     0x1000, &drm->client.base.vm);
        if (ret)
            goto fail_device;
    }

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

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

    ret = nouveau_irq_init(dev);
    if (ret)
        goto fail_irq;

    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_pm_init(dev);

    nouveau_accel_init(drm);
    nouveau_fbcon_init(dev);
    return 0;

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

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

    nouveau_fbcon_fini(dev);
    nouveau_accel_fini(drm);

    nouveau_pm_fini(dev);

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

    nouveau_irq_fini(dev);
    nouveau_bios_takedown(dev);

    nouveau_ttm_fini(drm);
    nouveau_agp_fini(drm);
    nouveau_vga_fini(drm);

    nouveau_cli_destroy(&drm->client);
    return 0;
}

static void
nouveau_drm_remove(struct pci_dev *pdev)
{
    struct drm_device *dev = pci_get_drvdata(pdev);
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_object *device;

    device = drm->client.base.device;
    drm_put_dev(dev);

    nouveau_object_ref(NULL, &device);
    nouveau_object_debug();
}

int
nouveau_drm_suspend(struct pci_dev *pdev, pm_message_t pm_state)
{
    struct drm_device *dev = pci_get_drvdata(pdev);
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_cli *cli;
    int ret;

    if (dev->switch_power_state == DRM_SWITCH_POWER_OFF ||
        pm_state.event == PM_EVENT_PRETHAW)
        return 0;

    if (dev->mode_config.num_crtc) {
        NV_INFO(drm, "suspending fbcon...\n");
        nouveau_fbcon_set_suspend(dev, 1);

        NV_INFO(drm, "suspending display...\n");
        ret = nouveau_display_suspend(dev);
        if (ret)
            return ret;
    }

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

    if (drm->fence && nouveau_fence(drm)->suspend) {
        if (!nouveau_fence(drm)->suspend(drm))
            return -ENOMEM;
    }

    NV_INFO(drm, "suspending client object trees...\n");
    list_for_each_entry(cli, &drm->clients, head) {
        ret = nouveau_client_fini(&cli->base, true);
        if (ret)
            goto fail_client;
    }

    ret = nouveau_client_fini(&drm->client.base, true);
    if (ret)
        goto fail_client;

    nouveau_agp_fini(drm);

    pci_save_state(pdev);
    if (pm_state.event == PM_EVENT_SUSPEND) {
        pci_disable_device(pdev);
        pci_set_power_state(pdev, PCI_D3hot);
    }

    return 0;

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

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

int
nouveau_drm_resume(struct pci_dev *pdev)
{
    struct drm_device *dev = pci_get_drvdata(pdev);
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_cli *cli;
    int ret;

    if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
        return 0;

    NV_INFO(drm, "re-enabling device...\n");
    pci_set_power_state(pdev, PCI_D0);
    pci_restore_state(pdev);
    ret = pci_enable_device(pdev);
    if (ret)
        return ret;
    pci_set_master(pdev);

    nouveau_agp_reset(drm);

    NV_INFO(drm, "resuming client object trees...\n");
    nouveau_client_init(&drm->client.base);
    nouveau_agp_init(drm);

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

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

    nouveau_run_vbios_init(dev);
    nouveau_irq_postinstall(dev);
    nouveau_pm_resume(dev);

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

static int
nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv)
{
    struct pci_dev *pdev = dev->pdev;
    struct nouveau_drm *drm = nouveau_drm(dev);
    struct nouveau_cli *cli;
    char name[16];
    int ret;

    snprintf(name, sizeof(name), "%d", pid_nr(fpriv->pid));

    ret = nouveau_cli_create(pdev, name, sizeof(*cli), (void **)&cli);
    if (ret)
        return ret;

    if (nv_device(drm->device)->card_type >= NV_50) {
        ret = nouveau_vm_new(nv_device(drm->device), 0, (1ULL << 40),
                     0x1000, &cli->base.vm);
        if (ret) {
            nouveau_cli_destroy(cli);
            return ret;
        }
    }

    fpriv->driver_priv = cli;

    mutex_lock(&drm->client.mutex);
    list_add(&cli->head, &drm->clients);
    mutex_unlock(&drm->client.mutex);
    return 0;
}

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);

    if (cli->abi16)
        nouveau_abi16_fini(cli->abi16);

    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);
}

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

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

static struct drm_driver
driver = {
    .driver_features =
        DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG |
        DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM |
        DRIVER_MODESET | DRIVER_PRIME,

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

    .irq_preinstall = nouveau_irq_preinstall,
    .irq_postinstall = nouveau_irq_postinstall,
    .irq_uninstall = nouveau_irq_uninstall,
    .irq_handler = nouveau_irq_handler,

    .get_vblank_counter = drm_vblank_count,
    .enable_vblank = nouveau_vblank_enable,
    .disable_vblank = nouveau_vblank_disable,

    .ioctls = 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 = nouveau_gem_prime_export,
    .gem_prime_import = nouveau_gem_prime_import,

    .gem_init_object = nouveau_gem_object_new,
    .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 = nouveau_display_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 struct pci_driver
nouveau_drm_pci_driver = {
    .name = "nouveau",
    .id_table = nouveau_drm_pci_table,
    .probe = nouveau_drm_probe,
    .remove = nouveau_drm_remove,
    .suspend = nouveau_drm_suspend,
    .resume = nouveau_drm_resume,
};

static int __init
nouveau_drm_init(void)
{
    driver.num_ioctls = ARRAY_SIZE(nouveau_ioctls);

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

    if (!nouveau_modeset)
        return 0;

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

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

    drm_pci_exit(&driver, &nouveau_drm_pci_driver);
    nouveau_unregister_dsm_handler();
}

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");