[PATCH 07/11] drm/ttm: merge ttm_backend and ttm_tt
Konrad Rzeszutek Wilk
konrad.wilk at oracle.com
Mon Nov 7 06:39:01 PST 2011
On Thu, Nov 03, 2011 at 07:39:11PM -0400, j.glisse at gmail.com wrote:
> From: Jerome Glisse <jglisse at redhat.com>
>
> ttm_backend will exist only and only with a ttm_tt, and ttm_tt
> will be of interesting use only when bind to a backend. Thus to
> avoid code & data duplication btw the two merge them.
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
>
> Signed-off-by: Jerome Glisse <jglisse at redhat.com>
> ---
> drivers/gpu/drm/nouveau/nouveau_bo.c | 14 ++-
> drivers/gpu/drm/nouveau/nouveau_drv.h | 5 +-
> drivers/gpu/drm/nouveau/nouveau_sgdma.c | 188 ++++++++++++--------------
> drivers/gpu/drm/radeon/radeon_ttm.c | 222 ++++++++++++-------------------
> drivers/gpu/drm/ttm/ttm_agp_backend.c | 88 +++++--------
> drivers/gpu/drm/ttm/ttm_bo.c | 9 +-
> drivers/gpu/drm/ttm/ttm_tt.c | 59 ++-------
> drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c | 66 +++------
> include/drm/ttm/ttm_bo_driver.h | 104 ++++++---------
> 9 files changed, 295 insertions(+), 460 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index 7226f41..b060fa4 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -343,8 +343,10 @@ nouveau_bo_wr32(struct nouveau_bo *nvbo, unsigned index, u32 val)
> *mem = val;
> }
>
> -static struct ttm_backend *
> -nouveau_bo_create_ttm_backend_entry(struct ttm_bo_device *bdev)
> +static struct ttm_tt *
> +nouveau_ttm_tt_create(struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> {
> struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
> struct drm_device *dev = dev_priv->dev;
> @@ -352,11 +354,13 @@ nouveau_bo_create_ttm_backend_entry(struct ttm_bo_device *bdev)
> switch (dev_priv->gart_info.type) {
> #if __OS_HAS_AGP
> case NOUVEAU_GART_AGP:
> - return ttm_agp_backend_init(bdev, dev->agp->bridge);
> + return ttm_agp_tt_create(bdev, dev->agp->bridge,
> + size, page_flags, dummy_read_page);
> #endif
> case NOUVEAU_GART_PDMA:
> case NOUVEAU_GART_HW:
> - return nouveau_sgdma_init_ttm(dev);
> + return nouveau_sgdma_create_ttm(bdev, size, page_flags,
> + dummy_read_page);
> default:
> NV_ERROR(dev, "Unknown GART type %d\n",
> dev_priv->gart_info.type);
> @@ -1045,7 +1049,7 @@ nouveau_bo_fence(struct nouveau_bo *nvbo, struct nouveau_fence *fence)
> }
>
> struct ttm_bo_driver nouveau_bo_driver = {
> - .create_ttm_backend_entry = nouveau_bo_create_ttm_backend_entry,
> + .ttm_tt_create = &nouveau_ttm_tt_create,
> .invalidate_caches = nouveau_bo_invalidate_caches,
> .init_mem_type = nouveau_bo_init_mem_type,
> .evict_flags = nouveau_bo_evict_flags,
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
> index 29837da..0c53e39 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drv.h
> +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
> @@ -1000,7 +1000,10 @@ extern int nouveau_sgdma_init(struct drm_device *);
> extern void nouveau_sgdma_takedown(struct drm_device *);
> extern uint32_t nouveau_sgdma_get_physical(struct drm_device *,
> uint32_t offset);
> -extern struct ttm_backend *nouveau_sgdma_init_ttm(struct drm_device *);
> +extern struct ttm_tt *nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
> + unsigned long size,
> + uint32_t page_flags,
> + struct page *dummy_read_page);
>
> /* nouveau_debugfs.c */
> #if defined(CONFIG_DRM_NOUVEAU_DEBUG)
> diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> index b75258a..bc2ab90 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> @@ -8,44 +8,23 @@
> #define NV_CTXDMA_PAGE_MASK (NV_CTXDMA_PAGE_SIZE - 1)
>
> struct nouveau_sgdma_be {
> - struct ttm_backend backend;
> + struct ttm_tt ttm;
> struct drm_device *dev;
> -
> - dma_addr_t *pages;
> - unsigned nr_pages;
> - bool unmap_pages;
> -
> u64 offset;
> - bool bound;
> };
>
> static int
> -nouveau_sgdma_populate(struct ttm_backend *be, unsigned long num_pages,
> - struct page **pages, struct page *dummy_read_page,
> - dma_addr_t *dma_addrs)
> +nouveau_sgdma_dma_map(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_device *dev = nvbe->dev;
> int i;
>
> - NV_DEBUG(nvbe->dev, "num_pages = %ld\n", num_pages);
> -
> - nvbe->pages = dma_addrs;
> - nvbe->nr_pages = num_pages;
> - nvbe->unmap_pages = true;
> -
> - /* this code path isn't called and is incorrect anyways */
> - if (0) { /* dma_addrs[0] != DMA_ERROR_CODE) { */
> - nvbe->unmap_pages = false;
> - return 0;
> - }
> -
> - for (i = 0; i < num_pages; i++) {
> - nvbe->pages[i] = pci_map_page(dev->pdev, pages[i], 0,
> - PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
> - if (pci_dma_mapping_error(dev->pdev, nvbe->pages[i])) {
> - nvbe->nr_pages = --i;
> - be->func->clear(be);
> + for (i = 0; i < ttm->num_pages; i++) {
> + ttm->dma_address[i] = pci_map_page(dev->pdev, ttm->pages[i],
> + 0, PAGE_SIZE,
> + PCI_DMA_BIDIRECTIONAL);
> + if (pci_dma_mapping_error(dev->pdev, ttm->dma_address[i])) {
> return -EFAULT;
> }
> }
> @@ -54,53 +33,52 @@ nouveau_sgdma_populate(struct ttm_backend *be, unsigned long num_pages,
> }
>
> static void
> -nouveau_sgdma_clear(struct ttm_backend *be)
> +nouveau_sgdma_dma_unmap(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_device *dev = nvbe->dev;
> + int i;
>
> - if (nvbe->bound)
> - be->func->unbind(be);
> -
> - if (nvbe->unmap_pages) {
> - while (nvbe->nr_pages--) {
> - pci_unmap_page(dev->pdev, nvbe->pages[nvbe->nr_pages],
> + for (i = 0; i < ttm->num_pages; i++) {
> + if (ttm->dma_address[i]) {
> + pci_unmap_page(dev->pdev, ttm->dma_address[i],
> PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
> }
> + ttm->dma_address[i] = 0;
> }
> }
>
> static void
> -nouveau_sgdma_destroy(struct ttm_backend *be)
> +nouveau_sgdma_destroy(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
>
> - if (be) {
> + if (ttm) {
> NV_DEBUG(nvbe->dev, "\n");
> -
> - if (nvbe) {
> - if (nvbe->pages)
> - be->func->clear(be);
> - kfree(nvbe);
> - }
> + kfree(nvbe);
> }
> }
>
> static int
> -nv04_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> +nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_device *dev = nvbe->dev;
> struct drm_nouveau_private *dev_priv = dev->dev_private;
> struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
> unsigned i, j, pte;
> + int r;
>
> NV_DEBUG(dev, "pg=0x%lx\n", mem->start);
> + r = nouveau_sgdma_dma_map(ttm);
> + if (r) {
> + return r;
> + }
>
> nvbe->offset = mem->start << PAGE_SHIFT;
> pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
> - for (i = 0; i < nvbe->nr_pages; i++) {
> - dma_addr_t dma_offset = nvbe->pages[i];
> + for (i = 0; i < ttm->num_pages; i++) {
> + dma_addr_t dma_offset = ttm->dma_address[i];
> uint32_t offset_l = lower_32_bits(dma_offset);
>
> for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++) {
> @@ -109,14 +87,13 @@ nv04_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> }
> }
>
> - nvbe->bound = true;
> return 0;
> }
>
> static int
> -nv04_sgdma_unbind(struct ttm_backend *be)
> +nv04_sgdma_unbind(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_device *dev = nvbe->dev;
> struct drm_nouveau_private *dev_priv = dev->dev_private;
> struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
> @@ -124,22 +101,20 @@ nv04_sgdma_unbind(struct ttm_backend *be)
>
> NV_DEBUG(dev, "\n");
>
> - if (!nvbe->bound)
> + if (ttm->state != tt_bound)
> return 0;
>
> pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
> - for (i = 0; i < nvbe->nr_pages; i++) {
> + for (i = 0; i < ttm->num_pages; i++) {
> for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++)
> nv_wo32(gpuobj, (pte * 4) + 0, 0x00000000);
> }
>
> - nvbe->bound = false;
> + nouveau_sgdma_dma_unmap(ttm);
> return 0;
> }
>
> static struct ttm_backend_func nv04_sgdma_backend = {
> - .populate = nouveau_sgdma_populate,
> - .clear = nouveau_sgdma_clear,
> .bind = nv04_sgdma_bind,
> .unbind = nv04_sgdma_unbind,
> .destroy = nouveau_sgdma_destroy
> @@ -158,16 +133,21 @@ nv41_sgdma_flush(struct nouveau_sgdma_be *nvbe)
> }
>
> static int
> -nv41_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> +nv41_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
> struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
> - dma_addr_t *list = nvbe->pages;
> + dma_addr_t *list = ttm->dma_address;
> u32 pte = mem->start << 2;
> - u32 cnt = nvbe->nr_pages;
> + u32 cnt = ttm->num_pages;
> + int r;
>
> nvbe->offset = mem->start << PAGE_SHIFT;
> + r = nouveau_sgdma_dma_map(ttm);
> + if (r) {
> + return r;
> + }
>
> while (cnt--) {
> nv_wo32(pgt, pte, (*list++ >> 7) | 1);
> @@ -175,18 +155,17 @@ nv41_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> }
>
> nv41_sgdma_flush(nvbe);
> - nvbe->bound = true;
> return 0;
> }
>
> static int
> -nv41_sgdma_unbind(struct ttm_backend *be)
> +nv41_sgdma_unbind(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
> struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
> u32 pte = (nvbe->offset >> 12) << 2;
> - u32 cnt = nvbe->nr_pages;
> + u32 cnt = ttm->num_pages;
>
> while (cnt--) {
> nv_wo32(pgt, pte, 0x00000000);
> @@ -194,24 +173,23 @@ nv41_sgdma_unbind(struct ttm_backend *be)
> }
>
> nv41_sgdma_flush(nvbe);
> - nvbe->bound = false;
> + nouveau_sgdma_dma_unmap(ttm);
> return 0;
> }
>
> static struct ttm_backend_func nv41_sgdma_backend = {
> - .populate = nouveau_sgdma_populate,
> - .clear = nouveau_sgdma_clear,
> .bind = nv41_sgdma_bind,
> .unbind = nv41_sgdma_unbind,
> .destroy = nouveau_sgdma_destroy
> };
>
> static void
> -nv44_sgdma_flush(struct nouveau_sgdma_be *nvbe)
> +nv44_sgdma_flush(struct ttm_tt *ttm)
> {
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_device *dev = nvbe->dev;
>
> - nv_wr32(dev, 0x100814, (nvbe->nr_pages - 1) << 12);
> + nv_wr32(dev, 0x100814, (ttm->num_pages - 1) << 12);
> nv_wr32(dev, 0x100808, nvbe->offset | 0x20);
> if (!nv_wait(dev, 0x100808, 0x00000001, 0x00000001))
> NV_ERROR(dev, "gart flush timeout: 0x%08x\n",
> @@ -270,17 +248,21 @@ nv44_sgdma_fill(struct nouveau_gpuobj *pgt, dma_addr_t *list, u32 base, u32 cnt)
> }
>
> static int
> -nv44_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> +nv44_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
> struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
> - dma_addr_t *list = nvbe->pages;
> + dma_addr_t *list = ttm->dma_address;
> u32 pte = mem->start << 2, tmp[4];
> - u32 cnt = nvbe->nr_pages;
> - int i;
> + u32 cnt = ttm->num_pages;
> + int i, r;
>
> nvbe->offset = mem->start << PAGE_SHIFT;
> + r = nouveau_sgdma_dma_map(ttm);
> + if (r) {
> + return r;
> + }
>
> if (pte & 0x0000000c) {
> u32 max = 4 - ((pte >> 2) & 0x3);
> @@ -305,19 +287,18 @@ nv44_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> if (cnt)
> nv44_sgdma_fill(pgt, list, pte, cnt);
>
> - nv44_sgdma_flush(nvbe);
> - nvbe->bound = true;
> + nv44_sgdma_flush(ttm);
> return 0;
> }
>
> static int
> -nv44_sgdma_unbind(struct ttm_backend *be)
> +nv44_sgdma_unbind(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> + struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
> struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
> struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
> u32 pte = (nvbe->offset >> 12) << 2;
> - u32 cnt = nvbe->nr_pages;
> + u32 cnt = ttm->num_pages;
>
> if (pte & 0x0000000c) {
> u32 max = 4 - ((pte >> 2) & 0x3);
> @@ -339,55 +320,53 @@ nv44_sgdma_unbind(struct ttm_backend *be)
> if (cnt)
> nv44_sgdma_fill(pgt, NULL, pte, cnt);
>
> - nv44_sgdma_flush(nvbe);
> - nvbe->bound = false;
> + nv44_sgdma_flush(ttm);
> + nouveau_sgdma_dma_unmap(ttm);
> return 0;
> }
>
> static struct ttm_backend_func nv44_sgdma_backend = {
> - .populate = nouveau_sgdma_populate,
> - .clear = nouveau_sgdma_clear,
> .bind = nv44_sgdma_bind,
> .unbind = nv44_sgdma_unbind,
> .destroy = nouveau_sgdma_destroy
> };
>
> static int
> -nv50_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
> +nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> struct nouveau_mem *node = mem->mm_node;
> + int r;
> +
> /* noop: bound in move_notify() */
> - node->pages = nvbe->pages;
> - nvbe->pages = (dma_addr_t *)node;
> - nvbe->bound = true;
> + r = nouveau_sgdma_dma_map(ttm);
> + if (r) {
> + return r;
> + }
> + node->pages = ttm->dma_address;
> return 0;
> }
>
> static int
> -nv50_sgdma_unbind(struct ttm_backend *be)
> +nv50_sgdma_unbind(struct ttm_tt *ttm)
> {
> - struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
> - struct nouveau_mem *node = (struct nouveau_mem *)nvbe->pages;
> /* noop: unbound in move_notify() */
> - nvbe->pages = node->pages;
> - node->pages = NULL;
> - nvbe->bound = false;
> + nouveau_sgdma_dma_unmap(ttm);
> return 0;
> }
>
> static struct ttm_backend_func nv50_sgdma_backend = {
> - .populate = nouveau_sgdma_populate,
> - .clear = nouveau_sgdma_clear,
> .bind = nv50_sgdma_bind,
> .unbind = nv50_sgdma_unbind,
> .destroy = nouveau_sgdma_destroy
> };
>
> -struct ttm_backend *
> -nouveau_sgdma_init_ttm(struct drm_device *dev)
> +struct ttm_tt *
> +nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> {
> - struct drm_nouveau_private *dev_priv = dev->dev_private;
> + struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
> + struct drm_device *dev = dev_priv->dev;
> struct nouveau_sgdma_be *nvbe;
>
> nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
> @@ -395,9 +374,12 @@ nouveau_sgdma_init_ttm(struct drm_device *dev)
> return NULL;
>
> nvbe->dev = dev;
> + nvbe->ttm.func = dev_priv->gart_info.func;
>
> - nvbe->backend.func = dev_priv->gart_info.func;
> - return &nvbe->backend;
> + if (ttm_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page)) {
> + return NULL;
> + }
> + return &nvbe->ttm;
> }
>
> int
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 97c76ae..53ff62b 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -114,24 +114,6 @@ static void radeon_ttm_global_fini(struct radeon_device *rdev)
> }
> }
>
> -struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
> -
> -static struct ttm_backend*
> -radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
> -{
> - struct radeon_device *rdev;
> -
> - rdev = radeon_get_rdev(bdev);
> -#if __OS_HAS_AGP
> - if (rdev->flags & RADEON_IS_AGP) {
> - return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
> - } else
> -#endif
> - {
> - return radeon_ttm_backend_create(rdev);
> - }
> -}
> -
> static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
> {
> return 0;
> @@ -515,8 +497,93 @@ static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
> return radeon_fence_signaled((struct radeon_fence *)sync_obj);
> }
>
> +/*
> + * TTM backend functions.
> + */
> +struct radeon_ttm_tt {
> + struct ttm_tt ttm;
> + struct radeon_device *rdev;
> + u64 offset;
> +};
> +
> +static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
> + struct ttm_mem_reg *bo_mem)
> +{
> + struct radeon_ttm_tt *gtt;
> + int r;
> +
> + gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
> + gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
> + if (!ttm->num_pages) {
> + WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
> + ttm->num_pages, bo_mem, ttm);
> + }
> + r = radeon_gart_bind(gtt->rdev, gtt->offset,
> + ttm->num_pages, ttm->pages, ttm->dma_address);
> + if (r) {
> + DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
> + ttm->num_pages, (unsigned)gtt->offset);
> + return r;
> + }
> + return 0;
> +}
> +
> +static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
> +{
> + struct radeon_ttm_tt *gtt;
> +
> + gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
> + radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
> + return 0;
> +}
> +
> +static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
> +{
> + struct radeon_ttm_tt *gtt;
> +
> + gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
> + if (ttm->state == tt_bound) {
> + radeon_ttm_backend_unbind(ttm);
> + }
> + kfree(gtt);
> +}
> +
> +static struct ttm_backend_func radeon_backend_func = {
> + .bind = &radeon_ttm_backend_bind,
> + .unbind = &radeon_ttm_backend_unbind,
> + .destroy = &radeon_ttm_backend_destroy,
> +};
> +
> +struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> +{
> + struct radeon_device *rdev;
> + struct radeon_ttm_tt *gtt;
> +
> + rdev = radeon_get_rdev(bdev);
> +#if __OS_HAS_AGP
> + if (rdev->flags & RADEON_IS_AGP) {
> + return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
> + size, page_flags, dummy_read_page);
> + }
> +#endif
> +
> + gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
> + if (gtt == NULL) {
> + return NULL;
> + }
> + gtt->ttm.func = &radeon_backend_func;
> + gtt->rdev = rdev;
> + if (ttm_tt_init(>t->ttm, bdev, size, page_flags, dummy_read_page)) {
> + return NULL;
> + }
> + return >t->ttm;
> +}
> +
> +
> static struct ttm_bo_driver radeon_bo_driver = {
> - .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
> + .ttm_tt_create = &radeon_ttm_tt_create,
> .invalidate_caches = &radeon_invalidate_caches,
> .init_mem_type = &radeon_init_mem_type,
> .evict_flags = &radeon_evict_flags,
> @@ -680,123 +747,6 @@ int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
> }
>
>
> -/*
> - * TTM backend functions.
> - */
> -struct radeon_ttm_backend {
> - struct ttm_backend backend;
> - struct radeon_device *rdev;
> - unsigned long num_pages;
> - struct page **pages;
> - struct page *dummy_read_page;
> - dma_addr_t *dma_addrs;
> - bool populated;
> - bool bound;
> - unsigned offset;
> -};
> -
> -static int radeon_ttm_backend_populate(struct ttm_backend *backend,
> - unsigned long num_pages,
> - struct page **pages,
> - struct page *dummy_read_page,
> - dma_addr_t *dma_addrs)
> -{
> - struct radeon_ttm_backend *gtt;
> -
> - gtt = container_of(backend, struct radeon_ttm_backend, backend);
> - gtt->pages = pages;
> - gtt->dma_addrs = dma_addrs;
> - gtt->num_pages = num_pages;
> - gtt->dummy_read_page = dummy_read_page;
> - gtt->populated = true;
> - return 0;
> -}
> -
> -static void radeon_ttm_backend_clear(struct ttm_backend *backend)
> -{
> - struct radeon_ttm_backend *gtt;
> -
> - gtt = container_of(backend, struct radeon_ttm_backend, backend);
> - gtt->pages = NULL;
> - gtt->dma_addrs = NULL;
> - gtt->num_pages = 0;
> - gtt->dummy_read_page = NULL;
> - gtt->populated = false;
> - gtt->bound = false;
> -}
> -
> -
> -static int radeon_ttm_backend_bind(struct ttm_backend *backend,
> - struct ttm_mem_reg *bo_mem)
> -{
> - struct radeon_ttm_backend *gtt;
> - int r;
> -
> - gtt = container_of(backend, struct radeon_ttm_backend, backend);
> - gtt->offset = bo_mem->start << PAGE_SHIFT;
> - if (!gtt->num_pages) {
> - WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
> - gtt->num_pages, bo_mem, backend);
> - }
> - r = radeon_gart_bind(gtt->rdev, gtt->offset,
> - gtt->num_pages, gtt->pages, gtt->dma_addrs);
> - if (r) {
> - DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
> - gtt->num_pages, gtt->offset);
> - return r;
> - }
> - gtt->bound = true;
> - return 0;
> -}
> -
> -static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
> -{
> - struct radeon_ttm_backend *gtt;
> -
> - gtt = container_of(backend, struct radeon_ttm_backend, backend);
> - radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
> - gtt->bound = false;
> - return 0;
> -}
> -
> -static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
> -{
> - struct radeon_ttm_backend *gtt;
> -
> - gtt = container_of(backend, struct radeon_ttm_backend, backend);
> - if (gtt->bound) {
> - radeon_ttm_backend_unbind(backend);
> - }
> - kfree(gtt);
> -}
> -
> -static struct ttm_backend_func radeon_backend_func = {
> - .populate = &radeon_ttm_backend_populate,
> - .clear = &radeon_ttm_backend_clear,
> - .bind = &radeon_ttm_backend_bind,
> - .unbind = &radeon_ttm_backend_unbind,
> - .destroy = &radeon_ttm_backend_destroy,
> -};
> -
> -struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
> -{
> - struct radeon_ttm_backend *gtt;
> -
> - gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
> - if (gtt == NULL) {
> - return NULL;
> - }
> - gtt->backend.bdev = &rdev->mman.bdev;
> - gtt->backend.func = &radeon_backend_func;
> - gtt->rdev = rdev;
> - gtt->pages = NULL;
> - gtt->num_pages = 0;
> - gtt->dummy_read_page = NULL;
> - gtt->populated = false;
> - gtt->bound = false;
> - return >t->backend;
> -}
> -
> #define RADEON_DEBUGFS_MEM_TYPES 2
>
> #if defined(CONFIG_DEBUG_FS)
> diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> index 1c4a72f..14ebd36 100644
> --- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
> +++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> @@ -40,45 +40,33 @@
> #include <asm/agp.h>
>
> struct ttm_agp_backend {
> - struct ttm_backend backend;
> + struct ttm_tt ttm;
> struct agp_memory *mem;
> struct agp_bridge_data *bridge;
> };
>
> -static int ttm_agp_populate(struct ttm_backend *backend,
> - unsigned long num_pages, struct page **pages,
> - struct page *dummy_read_page,
> - dma_addr_t *dma_addrs)
> +static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
> {
> - struct ttm_agp_backend *agp_be =
> - container_of(backend, struct ttm_agp_backend, backend);
> - struct page **cur_page, **last_page = pages + num_pages;
> + struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
> + struct drm_mm_node *node = bo_mem->mm_node;
> struct agp_memory *mem;
> + int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
> + unsigned i;
>
> - mem = agp_allocate_memory(agp_be->bridge, num_pages, AGP_USER_MEMORY);
> + mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
> if (unlikely(mem == NULL))
> return -ENOMEM;
>
> mem->page_count = 0;
> - for (cur_page = pages; cur_page < last_page; ++cur_page) {
> - struct page *page = *cur_page;
> + for (i = 0; i < ttm->num_pages; i++) {
> + struct page *page = ttm->pages[i];
> +
> if (!page)
> - page = dummy_read_page;
> + page = ttm->dummy_read_page;
>
> mem->pages[mem->page_count++] = page;
> }
> agp_be->mem = mem;
> - return 0;
> -}
> -
> -static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
> -{
> - struct ttm_agp_backend *agp_be =
> - container_of(backend, struct ttm_agp_backend, backend);
> - struct drm_mm_node *node = bo_mem->mm_node;
> - struct agp_memory *mem = agp_be->mem;
> - int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
> - int ret;
>
> mem->is_flushed = 1;
> mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
> @@ -90,50 +78,38 @@ static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
> return ret;
> }
>
> -static int ttm_agp_unbind(struct ttm_backend *backend)
> +static int ttm_agp_unbind(struct ttm_tt *ttm)
> {
> - struct ttm_agp_backend *agp_be =
> - container_of(backend, struct ttm_agp_backend, backend);
> -
> - if (agp_be->mem->is_bound)
> - return agp_unbind_memory(agp_be->mem);
> - else
> - return 0;
> -}
> + struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
>
> -static void ttm_agp_clear(struct ttm_backend *backend)
> -{
> - struct ttm_agp_backend *agp_be =
> - container_of(backend, struct ttm_agp_backend, backend);
> - struct agp_memory *mem = agp_be->mem;
> -
> - if (mem) {
> - ttm_agp_unbind(backend);
> - agp_free_memory(mem);
> + if (agp_be->mem) {
> + if (agp_be->mem->is_bound)
> + return agp_unbind_memory(agp_be->mem);
> + agp_free_memory(agp_be->mem);
> + agp_be->mem = NULL;
> }
> - agp_be->mem = NULL;
> + return 0;
> }
>
> -static void ttm_agp_destroy(struct ttm_backend *backend)
> +static void ttm_agp_destroy(struct ttm_tt *ttm)
> {
> - struct ttm_agp_backend *agp_be =
> - container_of(backend, struct ttm_agp_backend, backend);
> + struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
>
> if (agp_be->mem)
> - ttm_agp_clear(backend);
> + ttm_agp_unbind(ttm);
> kfree(agp_be);
> }
>
> static struct ttm_backend_func ttm_agp_func = {
> - .populate = ttm_agp_populate,
> - .clear = ttm_agp_clear,
> .bind = ttm_agp_bind,
> .unbind = ttm_agp_unbind,
> .destroy = ttm_agp_destroy,
> };
>
> -struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
> - struct agp_bridge_data *bridge)
> +struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
> + struct agp_bridge_data *bridge,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> {
> struct ttm_agp_backend *agp_be;
>
> @@ -143,10 +119,14 @@ struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
>
> agp_be->mem = NULL;
> agp_be->bridge = bridge;
> - agp_be->backend.func = &ttm_agp_func;
> - agp_be->backend.bdev = bdev;
> - return &agp_be->backend;
> + agp_be->ttm.func = &ttm_agp_func;
> +
> + if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
> + return NULL;
> + }
> +
> + return &agp_be->ttm;
> }
> -EXPORT_SYMBOL(ttm_agp_backend_init);
> +EXPORT_SYMBOL(ttm_agp_tt_create);
>
> #endif
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 4bde335..cb73527 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -337,8 +337,8 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
> if (zero_alloc)
> page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
> case ttm_bo_type_kernel:
> - bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
> - page_flags, glob->dummy_read_page);
> + bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
> + page_flags, glob->dummy_read_page);
> if (unlikely(bo->ttm == NULL))
> ret = -ENOMEM;
> break;
> @@ -1437,10 +1437,7 @@ int ttm_bo_global_init(struct drm_global_reference *ref)
> goto out_no_shrink;
> }
>
> - glob->ttm_bo_extra_size =
> - ttm_round_pot(sizeof(struct ttm_tt)) +
> - ttm_round_pot(sizeof(struct ttm_backend));
> -
> + glob->ttm_bo_extra_size = ttm_round_pot(sizeof(struct ttm_tt));
> glob->ttm_bo_size = glob->ttm_bo_extra_size +
> ttm_round_pot(sizeof(struct ttm_buffer_object));
>
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index 58ea7dc..b55e132 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -103,7 +103,6 @@ struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index)
> int ttm_tt_populate(struct ttm_tt *ttm)
> {
> struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
> - struct ttm_backend *be;
> int ret;
>
> if (ttm->state != tt_unpopulated)
> @@ -115,8 +114,6 @@ int ttm_tt_populate(struct ttm_tt *ttm)
> return ret;
> }
>
> - be = ttm->be;
> -
> ret = ttm_get_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
> ttm->caching_state, ttm->dma_address);
> if (ret != 0)
> @@ -129,8 +126,6 @@ int ttm_tt_populate(struct ttm_tt *ttm)
> return -ENOMEM;
> }
>
> - be->func->populate(be, ttm->num_pages, ttm->pages,
> - ttm->dummy_read_page, ttm->dma_address);
> ttm->state = tt_unbound;
> return 0;
> }
> @@ -239,12 +234,8 @@ EXPORT_SYMBOL(ttm_tt_set_placement_caching);
>
> static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
> {
> - struct ttm_backend *be = ttm->be;
> struct ttm_mem_global *glob = ttm->glob->mem_glob;
>
> - if (be)
> - be->func->clear(be);
> -
> ttm_mem_global_free_pages(glob, ttm->pages, ttm->num_pages);
> ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
> ttm->caching_state, ttm->dma_address);
> @@ -253,20 +244,11 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
>
> void ttm_tt_destroy(struct ttm_tt *ttm)
> {
> - struct ttm_backend *be;
> -
> if (unlikely(ttm == NULL))
> return;
>
> - be = ttm->be;
> - if (likely(be != NULL)) {
> - be->func->destroy(be);
> - ttm->be = NULL;
> - }
> -
> if (likely(ttm->pages != NULL)) {
> ttm_tt_free_alloced_pages(ttm);
> -
> ttm_tt_free_page_directory(ttm);
> }
>
> @@ -274,52 +256,38 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
> ttm->swap_storage)
> fput(ttm->swap_storage);
>
> - kfree(ttm);
> + ttm->swap_storage = NULL;
> + ttm->func->destroy(ttm);
> }
>
> -struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
> - uint32_t page_flags, struct page *dummy_read_page)
> +int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> {
> - struct ttm_bo_driver *bo_driver = bdev->driver;
> - struct ttm_tt *ttm;
> -
> - if (!bo_driver)
> - return NULL;
> -
> - ttm = kzalloc(sizeof(*ttm), GFP_KERNEL);
> - if (!ttm)
> - return NULL;
> -
> + ttm->bdev = bdev;
> ttm->glob = bdev->glob;
> ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
> ttm->caching_state = tt_cached;
> ttm->page_flags = page_flags;
> -
> ttm->dummy_read_page = dummy_read_page;
> + ttm->state = tt_unpopulated;
>
> ttm_tt_alloc_page_directory(ttm);
> if (!ttm->pages || !ttm->dma_address) {
> ttm_tt_destroy(ttm);
> printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
> - return NULL;
> - }
> - ttm->be = bo_driver->create_ttm_backend_entry(bdev);
> - if (!ttm->be) {
> - ttm_tt_destroy(ttm);
> - printk(KERN_ERR TTM_PFX "Failed creating ttm backend entry\n");
> - return NULL;
> + return -ENOMEM;
> }
> - ttm->state = tt_unpopulated;
> - return ttm;
> + return 0;
> }
> +EXPORT_SYMBOL(ttm_tt_init);
>
> void ttm_tt_unbind(struct ttm_tt *ttm)
> {
> int ret;
> - struct ttm_backend *be = ttm->be;
>
> if (ttm->state == tt_bound) {
> - ret = be->func->unbind(be);
> + ret = ttm->func->unbind(ttm);
> BUG_ON(ret);
> ttm->state = tt_unbound;
> }
> @@ -328,7 +296,6 @@ void ttm_tt_unbind(struct ttm_tt *ttm)
> int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
> {
> int ret = 0;
> - struct ttm_backend *be;
>
> if (!ttm)
> return -EINVAL;
> @@ -336,13 +303,11 @@ int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
> if (ttm->state == tt_bound)
> return 0;
>
> - be = ttm->be;
> -
> ret = ttm_tt_populate(ttm);
> if (ret)
> return ret;
>
> - ret = be->func->bind(be, bo_mem);
> + ret = ttm->func->bind(ttm, bo_mem);
> if (unlikely(ret != 0))
> return ret;
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> index 5a72ed9..cc72435 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> @@ -139,85 +139,61 @@ struct ttm_placement vmw_srf_placement = {
> .busy_placement = gmr_vram_placement_flags
> };
>
> -struct vmw_ttm_backend {
> - struct ttm_backend backend;
> - struct page **pages;
> - unsigned long num_pages;
> +struct vmw_ttm_tt {
> + struct ttm_tt ttm;
> struct vmw_private *dev_priv;
> int gmr_id;
> };
>
> -static int vmw_ttm_populate(struct ttm_backend *backend,
> - unsigned long num_pages, struct page **pages,
> - struct page *dummy_read_page,
> - dma_addr_t *dma_addrs)
> +static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
> {
> - struct vmw_ttm_backend *vmw_be =
> - container_of(backend, struct vmw_ttm_backend, backend);
> -
> - vmw_be->pages = pages;
> - vmw_be->num_pages = num_pages;
> -
> - return 0;
> -}
> -
> -static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
> -{
> - struct vmw_ttm_backend *vmw_be =
> - container_of(backend, struct vmw_ttm_backend, backend);
> + struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
>
> vmw_be->gmr_id = bo_mem->start;
>
> - return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
> - vmw_be->num_pages, vmw_be->gmr_id);
> + return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
> + ttm->num_pages, vmw_be->gmr_id);
> }
>
> -static int vmw_ttm_unbind(struct ttm_backend *backend)
> +static int vmw_ttm_unbind(struct ttm_tt *ttm)
> {
> - struct vmw_ttm_backend *vmw_be =
> - container_of(backend, struct vmw_ttm_backend, backend);
> + struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
>
> vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
> return 0;
> }
>
> -static void vmw_ttm_clear(struct ttm_backend *backend)
> +static void vmw_ttm_destroy(struct ttm_tt *ttm)
> {
> - struct vmw_ttm_backend *vmw_be =
> - container_of(backend, struct vmw_ttm_backend, backend);
> -
> - vmw_be->pages = NULL;
> - vmw_be->num_pages = 0;
> -}
> -
> -static void vmw_ttm_destroy(struct ttm_backend *backend)
> -{
> - struct vmw_ttm_backend *vmw_be =
> - container_of(backend, struct vmw_ttm_backend, backend);
> + struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
>
> kfree(vmw_be);
> }
>
> static struct ttm_backend_func vmw_ttm_func = {
> - .populate = vmw_ttm_populate,
> - .clear = vmw_ttm_clear,
> .bind = vmw_ttm_bind,
> .unbind = vmw_ttm_unbind,
> .destroy = vmw_ttm_destroy,
> };
>
> -struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
> +struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page)
> {
> - struct vmw_ttm_backend *vmw_be;
> + struct vmw_ttm_tt *vmw_be;
>
> vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
> if (!vmw_be)
> return NULL;
>
> - vmw_be->backend.func = &vmw_ttm_func;
> + vmw_be->ttm.func = &vmw_ttm_func;
> vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
>
> - return &vmw_be->backend;
> + if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
> + return NULL;
> + }
> +
> + return &vmw_be->ttm;
> }
>
> int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
> @@ -357,7 +333,7 @@ static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
> }
>
> struct ttm_bo_driver vmw_bo_driver = {
> - .create_ttm_backend_entry = vmw_ttm_backend_init,
> + .ttm_tt_create = &vmw_ttm_tt_create,
> .invalidate_caches = vmw_invalidate_caches,
> .init_mem_type = vmw_init_mem_type,
> .evict_flags = vmw_evict_flags,
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index 6d17140..6b8c5cd 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -43,36 +43,9 @@ struct ttm_backend;
>
> struct ttm_backend_func {
> /**
> - * struct ttm_backend_func member populate
> - *
> - * @backend: Pointer to a struct ttm_backend.
> - * @num_pages: Number of pages to populate.
> - * @pages: Array of pointers to ttm pages.
> - * @dummy_read_page: Page to be used instead of NULL pages in the
> - * array @pages.
> - * @dma_addrs: Array of DMA (bus) address of the ttm pages.
> - *
> - * Populate the backend with ttm pages. Depending on the backend,
> - * it may or may not copy the @pages array.
> - */
> - int (*populate) (struct ttm_backend *backend,
> - unsigned long num_pages, struct page **pages,
> - struct page *dummy_read_page,
> - dma_addr_t *dma_addrs);
> - /**
> - * struct ttm_backend_func member clear
> - *
> - * @backend: Pointer to a struct ttm_backend.
> - *
> - * This is an "unpopulate" function. Release all resources
> - * allocated with populate.
> - */
> - void (*clear) (struct ttm_backend *backend);
> -
> - /**
> * struct ttm_backend_func member bind
> *
> - * @backend: Pointer to a struct ttm_backend.
> + * @ttm: Pointer to a struct ttm_tt.
> * @bo_mem: Pointer to a struct ttm_mem_reg describing the
> * memory type and location for binding.
> *
> @@ -80,40 +53,27 @@ struct ttm_backend_func {
> * indicated by @bo_mem. This function should be able to handle
> * differences between aperture and system page sizes.
> */
> - int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem);
> + int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
>
> /**
> * struct ttm_backend_func member unbind
> *
> - * @backend: Pointer to a struct ttm_backend.
> + * @ttm: Pointer to a struct ttm_tt.
> *
> * Unbind previously bound backend pages. This function should be
> * able to handle differences between aperture and system page sizes.
> */
> - int (*unbind) (struct ttm_backend *backend);
> + int (*unbind) (struct ttm_tt *ttm);
>
> /**
> * struct ttm_backend_func member destroy
> *
> - * @backend: Pointer to a struct ttm_backend.
> + * @ttm: Pointer to a struct ttm_tt.
> *
> - * Destroy the backend.
> + * Destroy the backend. This will be call back from ttm_tt_destroy so
> + * don't call ttm_tt_destroy from the callback or infinite loop.
> */
> - void (*destroy) (struct ttm_backend *backend);
> -};
> -
> -/**
> - * struct ttm_backend
> - *
> - * @bdev: Pointer to a struct ttm_bo_device.
> - * @func: Pointer to a struct ttm_backend_func that describes
> - * the backend methods.
> - *
> - */
> -
> -struct ttm_backend {
> - struct ttm_bo_device *bdev;
> - struct ttm_backend_func *func;
> + void (*destroy) (struct ttm_tt *ttm);
> };
>
> #define TTM_PAGE_FLAG_WRITE (1 << 3)
> @@ -131,6 +91,9 @@ enum ttm_caching_state {
> /**
> * struct ttm_tt
> *
> + * @bdev: Pointer to a struct ttm_bo_device.
> + * @func: Pointer to a struct ttm_backend_func that describes
> + * the backend methods.
> * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
> * pointer.
> * @pages: Array of pages backing the data.
> @@ -148,6 +111,8 @@ enum ttm_caching_state {
> */
>
> struct ttm_tt {
> + struct ttm_bo_device *bdev;
> + struct ttm_backend_func *func;
> struct page *dummy_read_page;
> struct page **pages;
> uint32_t page_flags;
> @@ -336,15 +301,22 @@ struct ttm_mem_type_manager {
>
> struct ttm_bo_driver {
> /**
> - * struct ttm_bo_driver member create_ttm_backend_entry
> + * ttm_tt_create
> *
> - * @bdev: The buffer object device.
> + * @bdev: pointer to a struct ttm_bo_device:
> + * @size: Size of the data needed backing.
> + * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
> + * @dummy_read_page: See struct ttm_bo_device.
> *
> - * Create a driver specific struct ttm_backend.
> + * Create a struct ttm_tt to back data with system memory pages.
> + * No pages are actually allocated.
> + * Returns:
> + * NULL: Out of memory.
> */
> -
> - struct ttm_backend *(*create_ttm_backend_entry)
> - (struct ttm_bo_device *bdev);
> + struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
> + unsigned long size,
> + uint32_t page_flags,
> + struct page *dummy_read_page);
>
> /**
> * struct ttm_bo_driver member invalidate_caches
> @@ -585,8 +557,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
> }
>
> /**
> - * ttm_tt_create
> + * ttm_tt_init
> *
> + * @ttm: The struct ttm_tt.
> * @bdev: pointer to a struct ttm_bo_device:
> * @size: Size of the data needed backing.
> * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
> @@ -597,10 +570,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
> * Returns:
> * NULL: Out of memory.
> */
> -extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev,
> - unsigned long size,
> - uint32_t page_flags,
> - struct page *dummy_read_page);
> +extern int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page);
>
> /**
> * ttm_ttm_bind:
> @@ -626,7 +598,7 @@ extern int ttm_tt_populate(struct ttm_tt *ttm);
> *
> * @ttm: The struct ttm_tt.
> *
> - * Unbind, unpopulate and destroy a struct ttm_tt.
> + * Unbind, unpopulate and destroy common struct ttm_tt.
> */
> extern void ttm_tt_destroy(struct ttm_tt *ttm);
>
> @@ -1013,17 +985,23 @@ extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
> #include <linux/agp_backend.h>
>
> /**
> - * ttm_agp_backend_init
> + * ttm_agp_tt_create
> *
> * @bdev: Pointer to a struct ttm_bo_device.
> * @bridge: The agp bridge this device is sitting on.
> + * @size: Size of the data needed backing.
> + * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
> + * @dummy_read_page: See struct ttm_bo_device.
> + *
> *
> * Create a TTM backend that uses the indicated AGP bridge as an aperture
> * for TT memory. This function uses the linux agpgart interface to
> * bind and unbind memory backing a ttm_tt.
> */
> -extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
> - struct agp_bridge_data *bridge);
> +extern struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
> + struct agp_bridge_data *bridge,
> + unsigned long size, uint32_t page_flags,
> + struct page *dummy_read_page);
> #endif
>
> #endif
> --
> 1.7.7.1
More information about the dri-devel
mailing list