radeon_gem.c

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/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * 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: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */
#include <drm/drmP.h>
#include <drm/radeon_drm.h>
#include "radeon.h"

int radeon_gem_object_init(struct drm_gem_object *obj)
{
    BUG();

    return 0;
}

void radeon_gem_object_free(struct drm_gem_object *gobj)
{
    struct radeon_bo *robj = gem_to_radeon_bo(gobj);

    if (robj) {
        if (robj->gem_base.import_attach)
            drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
        radeon_bo_unref(&robj);
    }
}

int radeon_gem_object_create(struct radeon_device *rdev, int size,
                int alignment, int initial_domain,
                bool discardable, bool kernel,
                struct drm_gem_object **obj)
{
    struct radeon_bo *robj;
    unsigned long max_size;
    int r;

    *obj = NULL;
    /* At least align on page size */
    if (alignment < PAGE_SIZE) {
        alignment = PAGE_SIZE;
    }

    /* maximun bo size is the minimun btw visible vram and gtt size */
    max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
    if (size > max_size) {
        printk(KERN_WARNING "%s:%d alloc size %dMb bigger than %ldMb limit\n",
               __func__, __LINE__, size >> 20, max_size >> 20);
        return -ENOMEM;
    }

retry:
    r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain, NULL, &robj);
    if (r) {
        if (r != -ERESTARTSYS) {
            if (initial_domain == RADEON_GEM_DOMAIN_VRAM) {
                initial_domain |= RADEON_GEM_DOMAIN_GTT;
                goto retry;
            }
            DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
                  size, initial_domain, alignment, r);
        }
        return r;
    }
    *obj = &robj->gem_base;

    mutex_lock(&rdev->gem.mutex);
    list_add_tail(&robj->list, &rdev->gem.objects);
    mutex_unlock(&rdev->gem.mutex);

    return 0;
}

int radeon_gem_set_domain(struct drm_gem_object *gobj,
              uint32_t rdomain, uint32_t wdomain)
{
    struct radeon_bo *robj;
    uint32_t domain;
    int r;

    /* FIXME: reeimplement */
    robj = gem_to_radeon_bo(gobj);
    /* work out where to validate the buffer to */
    domain = wdomain;
    if (!domain) {
        domain = rdomain;
    }
    if (!domain) {
        /* Do nothings */
        printk(KERN_WARNING "Set domain without domain !\n");
        return 0;
    }
    if (domain == RADEON_GEM_DOMAIN_CPU) {
        /* Asking for cpu access wait for object idle */
        r = radeon_bo_wait(robj, NULL, false);
        if (r) {
            printk(KERN_ERR "Failed to wait for object !\n");
            return r;
        }
    }
    return 0;
}

int radeon_gem_init(struct radeon_device *rdev)
{
    INIT_LIST_HEAD(&rdev->gem.objects);
    return 0;
}

void radeon_gem_fini(struct radeon_device *rdev)
{
    radeon_bo_force_delete(rdev);
}

/*
 * Call from drm_gem_handle_create which appear in both new and open ioctl
 * case.
 */
int radeon_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
{
    struct radeon_bo *rbo = gem_to_radeon_bo(obj);
    struct radeon_device *rdev = rbo->rdev;
    struct radeon_fpriv *fpriv = file_priv->driver_priv;
    struct radeon_vm *vm = &fpriv->vm;
    struct radeon_bo_va *bo_va;
    int r;

    if (rdev->family < CHIP_CAYMAN) {
        return 0;
    }

    r = radeon_bo_reserve(rbo, false);
    if (r) {
        return r;
    }

    bo_va = radeon_vm_bo_find(vm, rbo);
    if (!bo_va) {
        bo_va = radeon_vm_bo_add(rdev, vm, rbo);
    } else {
        ++bo_va->ref_count;
    }
    radeon_bo_unreserve(rbo);

    return 0;
}

void radeon_gem_object_close(struct drm_gem_object *obj,
                 struct drm_file *file_priv)
{
    struct radeon_bo *rbo = gem_to_radeon_bo(obj);
    struct radeon_device *rdev = rbo->rdev;
    struct radeon_fpriv *fpriv = file_priv->driver_priv;
    struct radeon_vm *vm = &fpriv->vm;
    struct radeon_bo_va *bo_va;
    int r;

    if (rdev->family < CHIP_CAYMAN) {
        return;
    }

    r = radeon_bo_reserve(rbo, true);
    if (r) {
        dev_err(rdev->dev, "leaking bo va because "
            "we fail to reserve bo (%d)\n", r);
        return;
    }
    bo_va = radeon_vm_bo_find(vm, rbo);
    if (bo_va) {
        if (--bo_va->ref_count == 0) {
            radeon_vm_bo_rmv(rdev, bo_va);
        }
    }
    radeon_bo_unreserve(rbo);
}

static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
{
    if (r == -EDEADLK) {
        r = radeon_gpu_reset(rdev);
        if (!r)
            r = -EAGAIN;
    }
    return r;
}

/*
 * GEM ioctls.
 */
int radeon_gem_info_ioctl(struct drm_device *dev, void *data,
              struct drm_file *filp)
{
    struct radeon_device *rdev = dev->dev_private;
    struct drm_radeon_gem_info *args = data;
    struct ttm_mem_type_manager *man;
    unsigned i;

    man = &rdev->mman.bdev.man[TTM_PL_VRAM];

    args->vram_size = rdev->mc.real_vram_size;
    args->vram_visible = (u64)man->size << PAGE_SHIFT;
    if (rdev->stollen_vga_memory)
        args->vram_visible -= radeon_bo_size(rdev->stollen_vga_memory);
    args->vram_visible -= radeon_fbdev_total_size(rdev);
    args->gart_size = rdev->mc.gtt_size - 4096 - RADEON_IB_POOL_SIZE*64*1024;
    for(i = 0; i < RADEON_NUM_RINGS; ++i)
        args->gart_size -= rdev->ring[i].ring_size;
    return 0;
}

int radeon_gem_pread_ioctl(struct drm_device *dev, void *data,
               struct drm_file *filp)
{
    /* TODO: implement */
    DRM_ERROR("unimplemented %s\n", __func__);
    return -ENOSYS;
}

int radeon_gem_pwrite_ioctl(struct drm_device *dev, void *data,
                struct drm_file *filp)
{
    /* TODO: implement */
    DRM_ERROR("unimplemented %s\n", __func__);
    return -ENOSYS;
}

int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
                struct drm_file *filp)
{
    struct radeon_device *rdev = dev->dev_private;
    struct drm_radeon_gem_create *args = data;
    struct drm_gem_object *gobj;
    uint32_t handle;
    int r;

    down_read(&rdev->exclusive_lock);
    /* create a gem object to contain this object in */
    args->size = roundup(args->size, PAGE_SIZE);
    r = radeon_gem_object_create(rdev, args->size, args->alignment,
                    args->initial_domain, false,
                    false, &gobj);
    if (r) {
        up_read(&rdev->exclusive_lock);
        r = radeon_gem_handle_lockup(rdev, r);
        return r;
    }
    r = drm_gem_handle_create(filp, gobj, &handle);
    /* drop reference from allocate - handle holds it now */
    drm_gem_object_unreference_unlocked(gobj);
    if (r) {
        up_read(&rdev->exclusive_lock);
        r = radeon_gem_handle_lockup(rdev, r);
        return r;
    }
    args->handle = handle;
    up_read(&rdev->exclusive_lock);
    return 0;
}

int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
                struct drm_file *filp)
{
    /* transition the BO to a domain -
     * just validate the BO into a certain domain */
    struct radeon_device *rdev = dev->dev_private;
    struct drm_radeon_gem_set_domain *args = data;
    struct drm_gem_object *gobj;
    struct radeon_bo *robj;
    int r;

    /* for now if someone requests domain CPU -
     * just make sure the buffer is finished with */
    down_read(&rdev->exclusive_lock);

    /* just do a BO wait for now */
    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL) {
        up_read(&rdev->exclusive_lock);
        return -ENOENT;
    }
    robj = gem_to_radeon_bo(gobj);

    r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);

    drm_gem_object_unreference_unlocked(gobj);
    up_read(&rdev->exclusive_lock);
    r = radeon_gem_handle_lockup(robj->rdev, r);
    return r;
}

int radeon_mode_dumb_mmap(struct drm_file *filp,
              struct drm_device *dev,
              uint32_t handle, uint64_t *offset_p)
{
    struct drm_gem_object *gobj;
    struct radeon_bo *robj;

    gobj = drm_gem_object_lookup(dev, filp, handle);
    if (gobj == NULL) {
        return -ENOENT;
    }
    robj = gem_to_radeon_bo(gobj);
    *offset_p = radeon_bo_mmap_offset(robj);
    drm_gem_object_unreference_unlocked(gobj);
    return 0;
}

int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
              struct drm_file *filp)
{
    struct drm_radeon_gem_mmap *args = data;

    return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
}

int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
              struct drm_file *filp)
{
    struct radeon_device *rdev = dev->dev_private;
    struct drm_radeon_gem_busy *args = data;
    struct drm_gem_object *gobj;
    struct radeon_bo *robj;
    int r;
    uint32_t cur_placement = 0;

    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL) {
        return -ENOENT;
    }
    robj = gem_to_radeon_bo(gobj);
    r = radeon_bo_wait(robj, &cur_placement, true);
    switch (cur_placement) {
    case TTM_PL_VRAM:
        args->domain = RADEON_GEM_DOMAIN_VRAM;
        break;
    case TTM_PL_TT:
        args->domain = RADEON_GEM_DOMAIN_GTT;
        break;
    case TTM_PL_SYSTEM:
        args->domain = RADEON_GEM_DOMAIN_CPU;
    default:
        break;
    }
    drm_gem_object_unreference_unlocked(gobj);
    r = radeon_gem_handle_lockup(rdev, r);
    return r;
}

int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *filp)
{
    struct radeon_device *rdev = dev->dev_private;
    struct drm_radeon_gem_wait_idle *args = data;
    struct drm_gem_object *gobj;
    struct radeon_bo *robj;
    int r;

    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL) {
        return -ENOENT;
    }
    robj = gem_to_radeon_bo(gobj);
    r = radeon_bo_wait(robj, NULL, false);
    /* callback hw specific functions if any */
    if (rdev->asic->ioctl_wait_idle)
        robj->rdev->asic->ioctl_wait_idle(rdev, robj);
    drm_gem_object_unreference_unlocked(gobj);
    r = radeon_gem_handle_lockup(rdev, r);
    return r;
}

int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
                struct drm_file *filp)
{
    struct drm_radeon_gem_set_tiling *args = data;
    struct drm_gem_object *gobj;
    struct radeon_bo *robj;
    int r = 0;

    DRM_DEBUG("%d \n", args->handle);
    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL)
        return -ENOENT;
    robj = gem_to_radeon_bo(gobj);
    r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
    drm_gem_object_unreference_unlocked(gobj);
    return r;
}

int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
                struct drm_file *filp)
{
    struct drm_radeon_gem_get_tiling *args = data;
    struct drm_gem_object *gobj;
    struct radeon_bo *rbo;
    int r = 0;

    DRM_DEBUG("\n");
    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL)
        return -ENOENT;
    rbo = gem_to_radeon_bo(gobj);
    r = radeon_bo_reserve(rbo, false);
    if (unlikely(r != 0))
        goto out;
    radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
    radeon_bo_unreserve(rbo);
out:
    drm_gem_object_unreference_unlocked(gobj);
    return r;
}

int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
              struct drm_file *filp)
{
    struct drm_radeon_gem_va *args = data;
    struct drm_gem_object *gobj;
    struct radeon_device *rdev = dev->dev_private;
    struct radeon_fpriv *fpriv = filp->driver_priv;
    struct radeon_bo *rbo;
    struct radeon_bo_va *bo_va;
    u32 invalid_flags;
    int r = 0;

    if (!rdev->vm_manager.enabled) {
        args->operation = RADEON_VA_RESULT_ERROR;
        return -ENOTTY;
    }

    /* !! DONT REMOVE !!
     * We don't support vm_id yet, to be sure we don't have have broken
     * userspace, reject anyone trying to use non 0 value thus moving
     * forward we can use those fields without breaking existant userspace
     */
    if (args->vm_id) {
        args->operation = RADEON_VA_RESULT_ERROR;
        return -EINVAL;
    }

    if (args->offset < RADEON_VA_RESERVED_SIZE) {
        dev_err(&dev->pdev->dev,
            "offset 0x%lX is in reserved area 0x%X\n",
            (unsigned long)args->offset,
            RADEON_VA_RESERVED_SIZE);
        args->operation = RADEON_VA_RESULT_ERROR;
        return -EINVAL;
    }

    /* don't remove, we need to enforce userspace to set the snooped flag
     * otherwise we will endup with broken userspace and we won't be able
     * to enable this feature without adding new interface
     */
    invalid_flags = RADEON_VM_PAGE_VALID | RADEON_VM_PAGE_SYSTEM;
    if ((args->flags & invalid_flags)) {
        dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
            args->flags, invalid_flags);
        args->operation = RADEON_VA_RESULT_ERROR;
        return -EINVAL;
    }
    if (!(args->flags & RADEON_VM_PAGE_SNOOPED)) {
        dev_err(&dev->pdev->dev, "only supported snooped mapping for now\n");
        args->operation = RADEON_VA_RESULT_ERROR;
        return -EINVAL;
    }

    switch (args->operation) {
    case RADEON_VA_MAP:
    case RADEON_VA_UNMAP:
        break;
    default:
        dev_err(&dev->pdev->dev, "unsupported operation %d\n",
            args->operation);
        args->operation = RADEON_VA_RESULT_ERROR;
        return -EINVAL;
    }

    gobj = drm_gem_object_lookup(dev, filp, args->handle);
    if (gobj == NULL) {
        args->operation = RADEON_VA_RESULT_ERROR;
        return -ENOENT;
    }
    rbo = gem_to_radeon_bo(gobj);
    r = radeon_bo_reserve(rbo, false);
    if (r) {
        args->operation = RADEON_VA_RESULT_ERROR;
        drm_gem_object_unreference_unlocked(gobj);
        return r;
    }
    bo_va = radeon_vm_bo_find(&fpriv->vm, rbo);
    if (!bo_va) {
        args->operation = RADEON_VA_RESULT_ERROR;
        drm_gem_object_unreference_unlocked(gobj);
        return -ENOENT;
    }

    switch (args->operation) {
    case RADEON_VA_MAP:
        if (bo_va->soffset) {
            args->operation = RADEON_VA_RESULT_VA_EXIST;
            args->offset = bo_va->soffset;
            goto out;
        }
        r = radeon_vm_bo_set_addr(rdev, bo_va, args->offset, args->flags);
        break;
    case RADEON_VA_UNMAP:
        r = radeon_vm_bo_set_addr(rdev, bo_va, 0, 0);
        break;
    default:
        break;
    }
    args->operation = RADEON_VA_RESULT_OK;
    if (r) {
        args->operation = RADEON_VA_RESULT_ERROR;
    }
out:
    radeon_bo_unreserve(rbo);
    drm_gem_object_unreference_unlocked(gobj);
    return r;
}

int radeon_mode_dumb_create(struct drm_file *file_priv,
                struct drm_device *dev,
                struct drm_mode_create_dumb *args)
{
    struct radeon_device *rdev = dev->dev_private;
    struct drm_gem_object *gobj;
    uint32_t handle;
    int r;

    args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
    args->size = args->pitch * args->height;
    args->size = ALIGN(args->size, PAGE_SIZE);

    r = radeon_gem_object_create(rdev, args->size, 0,
                     RADEON_GEM_DOMAIN_VRAM,
                     false, ttm_bo_type_device,
                     &gobj);
    if (r)
        return -ENOMEM;

    r = drm_gem_handle_create(file_priv, gobj, &handle);
    /* drop reference from allocate - handle holds it now */
    drm_gem_object_unreference_unlocked(gobj);
    if (r) {
        return r;
    }
    args->handle = handle;
    return 0;
}

int radeon_mode_dumb_destroy(struct drm_file *file_priv,
                 struct drm_device *dev,
                 uint32_t handle)
{
    return drm_gem_handle_delete(file_priv, handle);
}