nouveau_ttm.c

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/*
 * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
 * All Rights Reserved.
 * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA,
 * All Rights Reserved.
 *
 * 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, sub license,
 * 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 */

#include <subdev/fb.h>
#include <subdev/vm.h>
#include <subdev/instmem.h>

#include "nouveau_drm.h"
#include "nouveau_ttm.h"
#include "nouveau_gem.h"

static int
nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
{
    /* nothing to do */
    return 0;
}

static int
nouveau_vram_manager_fini(struct ttm_mem_type_manager *man)
{
    /* nothing to do */
    return 0;
}

static inline void
nouveau_mem_node_cleanup(struct nouveau_mem *node)
{
    if (node->vma[0].node) {
        nouveau_vm_unmap(&node->vma[0]);
        nouveau_vm_put(&node->vma[0]);
    }

    if (node->vma[1].node) {
        nouveau_vm_unmap(&node->vma[1]);
        nouveau_vm_put(&node->vma[1]);
    }
}

static void
nouveau_vram_manager_del(struct ttm_mem_type_manager *man,
             struct ttm_mem_reg *mem)
{
    struct nouveau_drm *drm = nouveau_bdev(man->bdev);
    struct nouveau_fb *pfb = nouveau_fb(drm->device);
    nouveau_mem_node_cleanup(mem->mm_node);
    pfb->ram.put(pfb, (struct nouveau_mem **)&mem->mm_node);
}

static int
nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
             struct ttm_buffer_object *bo,
             struct ttm_placement *placement,
             struct ttm_mem_reg *mem)
{
    struct nouveau_drm *drm = nouveau_bdev(man->bdev);
    struct nouveau_fb *pfb = nouveau_fb(drm->device);
    struct nouveau_bo *nvbo = nouveau_bo(bo);
    struct nouveau_mem *node;
    u32 size_nc = 0;
    int ret;

    if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG)
        size_nc = 1 << nvbo->page_shift;

    ret = pfb->ram.get(pfb, mem->num_pages << PAGE_SHIFT,
               mem->page_alignment << PAGE_SHIFT, size_nc,
               (nvbo->tile_flags >> 8) & 0x3ff, &node);
    if (ret) {
        mem->mm_node = NULL;
        return (ret == -ENOSPC) ? 0 : ret;
    }

    node->page_shift = nvbo->page_shift;

    mem->mm_node = node;
    mem->start   = node->offset >> PAGE_SHIFT;
    return 0;
}

static void
nouveau_vram_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
{
    struct nouveau_mm *mm = man->priv;
    struct nouveau_mm_node *r;
    u32 total = 0, free = 0;

    mutex_lock(&mm->mutex);
    list_for_each_entry(r, &mm->nodes, nl_entry) {
        printk(KERN_DEBUG "%s %d: 0x%010llx 0x%010llx\n",
               prefix, r->type, ((u64)r->offset << 12),
               (((u64)r->offset + r->length) << 12));

        total += r->length;
        if (!r->type)
            free += r->length;
    }
    mutex_unlock(&mm->mutex);

    printk(KERN_DEBUG "%s  total: 0x%010llx free: 0x%010llx\n",
           prefix, (u64)total << 12, (u64)free << 12);
    printk(KERN_DEBUG "%s  block: 0x%08x\n",
           prefix, mm->block_size << 12);
}

const struct ttm_mem_type_manager_func nouveau_vram_manager = {
    nouveau_vram_manager_init,
    nouveau_vram_manager_fini,
    nouveau_vram_manager_new,
    nouveau_vram_manager_del,
    nouveau_vram_manager_debug
};

static int
nouveau_gart_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
{
    return 0;
}

static int
nouveau_gart_manager_fini(struct ttm_mem_type_manager *man)
{
    return 0;
}

static void
nouveau_gart_manager_del(struct ttm_mem_type_manager *man,
             struct ttm_mem_reg *mem)
{
    nouveau_mem_node_cleanup(mem->mm_node);
    kfree(mem->mm_node);
    mem->mm_node = NULL;
}

static int
nouveau_gart_manager_new(struct ttm_mem_type_manager *man,
             struct ttm_buffer_object *bo,
             struct ttm_placement *placement,
             struct ttm_mem_reg *mem)
{
    struct nouveau_mem *node;

    if (unlikely((mem->num_pages << PAGE_SHIFT) >= 512 * 1024 * 1024))
        return -ENOMEM;

    node = kzalloc(sizeof(*node), GFP_KERNEL);
    if (!node)
        return -ENOMEM;
    node->page_shift = 12;

    mem->mm_node = node;
    mem->start   = 0;
    return 0;
}

static void
nouveau_gart_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
{
}

const struct ttm_mem_type_manager_func nouveau_gart_manager = {
    nouveau_gart_manager_init,
    nouveau_gart_manager_fini,
    nouveau_gart_manager_new,
    nouveau_gart_manager_del,
    nouveau_gart_manager_debug
};

#include <core/subdev/vm/nv04.h>
static int
nv04_gart_manager_init(struct ttm_mem_type_manager *man, unsigned long psize)
{
    struct nouveau_drm *drm = nouveau_bdev(man->bdev);
    struct nouveau_vmmgr *vmm = nouveau_vmmgr(drm->device);
    struct nv04_vmmgr_priv *priv = (void *)vmm;
    struct nouveau_vm *vm = NULL;
    nouveau_vm_ref(priv->vm, &vm, NULL);
    man->priv = vm;
    return 0;
}

static int
nv04_gart_manager_fini(struct ttm_mem_type_manager *man)
{
    struct nouveau_vm *vm = man->priv;
    nouveau_vm_ref(NULL, &vm, NULL);
    man->priv = NULL;
    return 0;
}

static void
nv04_gart_manager_del(struct ttm_mem_type_manager *man, struct ttm_mem_reg *mem)
{
    struct nouveau_mem *node = mem->mm_node;
    if (node->vma[0].node)
        nouveau_vm_put(&node->vma[0]);
    kfree(mem->mm_node);
    mem->mm_node = NULL;
}

static int
nv04_gart_manager_new(struct ttm_mem_type_manager *man,
              struct ttm_buffer_object *bo,
              struct ttm_placement *placement,
              struct ttm_mem_reg *mem)
{
    struct nouveau_mem *node;
    int ret;

    node = kzalloc(sizeof(*node), GFP_KERNEL);
    if (!node)
        return -ENOMEM;

    node->page_shift = 12;

    ret = nouveau_vm_get(man->priv, mem->num_pages << 12, node->page_shift,
                 NV_MEM_ACCESS_RW, &node->vma[0]);
    if (ret) {
        kfree(node);
        return ret;
    }

    mem->mm_node = node;
    mem->start   = node->vma[0].offset >> PAGE_SHIFT;
    return 0;
}

static void
nv04_gart_manager_debug(struct ttm_mem_type_manager *man, const char *prefix)
{
}

const struct ttm_mem_type_manager_func nv04_gart_manager = {
    nv04_gart_manager_init,
    nv04_gart_manager_fini,
    nv04_gart_manager_new,
    nv04_gart_manager_del,
    nv04_gart_manager_debug
};

int
nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
{
    struct drm_file *file_priv = filp->private_data;
    struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);

    if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
        return drm_mmap(filp, vma);

    return ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
}

static int
nouveau_ttm_mem_global_init(struct drm_global_reference *ref)
{
    return ttm_mem_global_init(ref->object);
}

static void
nouveau_ttm_mem_global_release(struct drm_global_reference *ref)
{
    ttm_mem_global_release(ref->object);
}

int
nouveau_ttm_global_init(struct nouveau_drm *drm)
{
    struct drm_global_reference *global_ref;
    int ret;

    global_ref = &drm->ttm.mem_global_ref;
    global_ref->global_type = DRM_GLOBAL_TTM_MEM;
    global_ref->size = sizeof(struct ttm_mem_global);
    global_ref->init = &nouveau_ttm_mem_global_init;
    global_ref->release = &nouveau_ttm_mem_global_release;

    ret = drm_global_item_ref(global_ref);
    if (unlikely(ret != 0)) {
        DRM_ERROR("Failed setting up TTM memory accounting\n");
        drm->ttm.mem_global_ref.release = NULL;
        return ret;
    }

    drm->ttm.bo_global_ref.mem_glob = global_ref->object;
    global_ref = &drm->ttm.bo_global_ref.ref;
    global_ref->global_type = DRM_GLOBAL_TTM_BO;
    global_ref->size = sizeof(struct ttm_bo_global);
    global_ref->init = &ttm_bo_global_init;
    global_ref->release = &ttm_bo_global_release;

    ret = drm_global_item_ref(global_ref);
    if (unlikely(ret != 0)) {
        DRM_ERROR("Failed setting up TTM BO subsystem\n");
        drm_global_item_unref(&drm->ttm.mem_global_ref);
        drm->ttm.mem_global_ref.release = NULL;
        return ret;
    }

    return 0;
}

void
nouveau_ttm_global_release(struct nouveau_drm *drm)
{
    if (drm->ttm.mem_global_ref.release == NULL)
        return;

    drm_global_item_unref(&drm->ttm.bo_global_ref.ref);
    drm_global_item_unref(&drm->ttm.mem_global_ref);
    drm->ttm.mem_global_ref.release = NULL;
}

int
nouveau_ttm_init(struct nouveau_drm *drm)
{
    struct drm_device *dev = drm->dev;
    u32 bits;
    int ret;

    bits = nouveau_vmmgr(drm->device)->dma_bits;
    if ( drm->agp.stat == ENABLED ||
        !pci_dma_supported(dev->pdev, DMA_BIT_MASK(bits)))
        bits = 32;

    ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
    if (ret)
        return ret;

    ret = pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
    if (ret)
        pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(32));

    ret = nouveau_ttm_global_init(drm);
    if (ret)
        return ret;

    ret = ttm_bo_device_init(&drm->ttm.bdev,
                  drm->ttm.bo_global_ref.ref.object,
                  &nouveau_bo_driver, DRM_FILE_PAGE_OFFSET,
                  bits <= 32 ? true : false);
    if (ret) {
        NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
        return ret;
    }

    /* VRAM init */
    drm->gem.vram_available  = nouveau_fb(drm->device)->ram.size;
    drm->gem.vram_available -= nouveau_instmem(drm->device)->reserved;

    ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_VRAM,
                  drm->gem.vram_available >> PAGE_SHIFT);
    if (ret) {
        NV_ERROR(drm, "VRAM mm init failed, %d\n", ret);
        return ret;
    }

    drm->ttm.mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 1),
                     pci_resource_len(dev->pdev, 1),
                     DRM_MTRR_WC);

    /* GART init */
    if (drm->agp.stat != ENABLED) {
        drm->gem.gart_available = nouveau_vmmgr(drm->device)->limit;
        if (drm->gem.gart_available > 512 * 1024 * 1024)
            drm->gem.gart_available = 512 * 1024 * 1024;
    } else {
        drm->gem.gart_available = drm->agp.size;
    }

    ret = ttm_bo_init_mm(&drm->ttm.bdev, TTM_PL_TT,
                  drm->gem.gart_available >> PAGE_SHIFT);
    if (ret) {
        NV_ERROR(drm, "GART mm init failed, %d\n", ret);
        return ret;
    }

    NV_INFO(drm, "VRAM: %d MiB\n", (u32)(drm->gem.vram_available >> 20));
    NV_INFO(drm, "GART: %d MiB\n", (u32)(drm->gem.gart_available >> 20));
    return 0;
}

void
nouveau_ttm_fini(struct nouveau_drm *drm)
{
    mutex_lock(&drm->dev->struct_mutex);
    ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_VRAM);
    ttm_bo_clean_mm(&drm->ttm.bdev, TTM_PL_TT);
    mutex_unlock(&drm->dev->struct_mutex);

    ttm_bo_device_release(&drm->ttm.bdev);

    nouveau_ttm_global_release(drm);

    if (drm->ttm.mtrr >= 0) {
        drm_mtrr_del(drm->ttm.mtrr,
                 pci_resource_start(drm->dev->pdev, 1),
                 pci_resource_len(drm->dev->pdev, 1), DRM_MTRR_WC);
        drm->ttm.mtrr = -1;
    }
}