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Diffstat (limited to 'kernel/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c')
-rw-r--r--kernel/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c846
1 files changed, 846 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
new file mode 100644
index 000000000..cff2bf9db
--- /dev/null
+++ b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -0,0 +1,846 @@
+/**************************************************************************
+ *
+ * Copyright © 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 "vmwgfx_drv.h"
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_page_alloc.h>
+
+static struct ttm_place vram_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
+};
+
+static struct ttm_place vram_ne_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
+};
+
+static struct ttm_place sys_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED
+};
+
+static struct ttm_place sys_ne_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
+};
+
+static struct ttm_place gmr_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
+};
+
+static struct ttm_place gmr_ne_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
+};
+
+static struct ttm_place mob_placement_flags = {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
+};
+
+struct ttm_placement vmw_vram_placement = {
+ .num_placement = 1,
+ .placement = &vram_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &vram_placement_flags
+};
+
+static struct ttm_place vram_gmr_placement_flags[] = {
+ {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
+ }
+};
+
+static struct ttm_place gmr_vram_placement_flags[] = {
+ {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
+ }
+};
+
+struct ttm_placement vmw_vram_gmr_placement = {
+ .num_placement = 2,
+ .placement = vram_gmr_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &gmr_placement_flags
+};
+
+static struct ttm_place vram_gmr_ne_placement_flags[] = {
+ {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED |
+ TTM_PL_FLAG_NO_EVICT
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED |
+ TTM_PL_FLAG_NO_EVICT
+ }
+};
+
+struct ttm_placement vmw_vram_gmr_ne_placement = {
+ .num_placement = 2,
+ .placement = vram_gmr_ne_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &gmr_ne_placement_flags
+};
+
+struct ttm_placement vmw_vram_sys_placement = {
+ .num_placement = 1,
+ .placement = &vram_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &sys_placement_flags
+};
+
+struct ttm_placement vmw_vram_ne_placement = {
+ .num_placement = 1,
+ .placement = &vram_ne_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &vram_ne_placement_flags
+};
+
+struct ttm_placement vmw_sys_placement = {
+ .num_placement = 1,
+ .placement = &sys_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &sys_placement_flags
+};
+
+struct ttm_placement vmw_sys_ne_placement = {
+ .num_placement = 1,
+ .placement = &sys_ne_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &sys_ne_placement_flags
+};
+
+static struct ttm_place evictable_placement_flags[] = {
+ {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
+ }, {
+ .fpfn = 0,
+ .lpfn = 0,
+ .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
+ }
+};
+
+struct ttm_placement vmw_evictable_placement = {
+ .num_placement = 4,
+ .placement = evictable_placement_flags,
+ .num_busy_placement = 1,
+ .busy_placement = &sys_placement_flags
+};
+
+struct ttm_placement vmw_srf_placement = {
+ .num_placement = 1,
+ .num_busy_placement = 2,
+ .placement = &gmr_placement_flags,
+ .busy_placement = gmr_vram_placement_flags
+};
+
+struct ttm_placement vmw_mob_placement = {
+ .num_placement = 1,
+ .num_busy_placement = 1,
+ .placement = &mob_placement_flags,
+ .busy_placement = &mob_placement_flags
+};
+
+struct vmw_ttm_tt {
+ struct ttm_dma_tt dma_ttm;
+ struct vmw_private *dev_priv;
+ int gmr_id;
+ struct vmw_mob *mob;
+ int mem_type;
+ struct sg_table sgt;
+ struct vmw_sg_table vsgt;
+ uint64_t sg_alloc_size;
+ bool mapped;
+};
+
+const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
+
+/**
+ * Helper functions to advance a struct vmw_piter iterator.
+ *
+ * @viter: Pointer to the iterator.
+ *
+ * These functions return false if past the end of the list,
+ * true otherwise. Functions are selected depending on the current
+ * DMA mapping mode.
+ */
+static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
+{
+ return ++(viter->i) < viter->num_pages;
+}
+
+static bool __vmw_piter_sg_next(struct vmw_piter *viter)
+{
+ return __sg_page_iter_next(&viter->iter);
+}
+
+
+/**
+ * Helper functions to return a pointer to the current page.
+ *
+ * @viter: Pointer to the iterator
+ *
+ * These functions return a pointer to the page currently
+ * pointed to by @viter. Functions are selected depending on the
+ * current mapping mode.
+ */
+static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
+{
+ return viter->pages[viter->i];
+}
+
+static struct page *__vmw_piter_sg_page(struct vmw_piter *viter)
+{
+ return sg_page_iter_page(&viter->iter);
+}
+
+
+/**
+ * Helper functions to return the DMA address of the current page.
+ *
+ * @viter: Pointer to the iterator
+ *
+ * These functions return the DMA address of the page currently
+ * pointed to by @viter. Functions are selected depending on the
+ * current mapping mode.
+ */
+static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
+{
+ return page_to_phys(viter->pages[viter->i]);
+}
+
+static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
+{
+ return viter->addrs[viter->i];
+}
+
+static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
+{
+ return sg_page_iter_dma_address(&viter->iter);
+}
+
+
+/**
+ * vmw_piter_start - Initialize a struct vmw_piter.
+ *
+ * @viter: Pointer to the iterator to initialize
+ * @vsgt: Pointer to a struct vmw_sg_table to initialize from
+ *
+ * Note that we're following the convention of __sg_page_iter_start, so that
+ * the iterator doesn't point to a valid page after initialization; it has
+ * to be advanced one step first.
+ */
+void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
+ unsigned long p_offset)
+{
+ viter->i = p_offset - 1;
+ viter->num_pages = vsgt->num_pages;
+ switch (vsgt->mode) {
+ case vmw_dma_phys:
+ viter->next = &__vmw_piter_non_sg_next;
+ viter->dma_address = &__vmw_piter_phys_addr;
+ viter->page = &__vmw_piter_non_sg_page;
+ viter->pages = vsgt->pages;
+ break;
+ case vmw_dma_alloc_coherent:
+ viter->next = &__vmw_piter_non_sg_next;
+ viter->dma_address = &__vmw_piter_dma_addr;
+ viter->page = &__vmw_piter_non_sg_page;
+ viter->addrs = vsgt->addrs;
+ viter->pages = vsgt->pages;
+ break;
+ case vmw_dma_map_populate:
+ case vmw_dma_map_bind:
+ viter->next = &__vmw_piter_sg_next;
+ viter->dma_address = &__vmw_piter_sg_addr;
+ viter->page = &__vmw_piter_sg_page;
+ __sg_page_iter_start(&viter->iter, vsgt->sgt->sgl,
+ vsgt->sgt->orig_nents, p_offset);
+ break;
+ default:
+ BUG();
+ }
+}
+
+/**
+ * vmw_ttm_unmap_from_dma - unmap device addresses previsouly mapped for
+ * TTM pages
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_backend
+ *
+ * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
+ */
+static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
+{
+ struct device *dev = vmw_tt->dev_priv->dev->dev;
+
+ dma_unmap_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.nents,
+ DMA_BIDIRECTIONAL);
+ vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
+}
+
+/**
+ * vmw_ttm_map_for_dma - map TTM pages to get device addresses
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_backend
+ *
+ * This function is used to get device addresses from the kernel DMA layer.
+ * However, it's violating the DMA API in that when this operation has been
+ * performed, it's illegal for the CPU to write to the pages without first
+ * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
+ * therefore only legal to call this function if we know that the function
+ * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
+ * a CPU write buffer flush.
+ */
+static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
+{
+ struct device *dev = vmw_tt->dev_priv->dev->dev;
+ int ret;
+
+ ret = dma_map_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.orig_nents,
+ DMA_BIDIRECTIONAL);
+ if (unlikely(ret == 0))
+ return -ENOMEM;
+
+ vmw_tt->sgt.nents = ret;
+
+ return 0;
+}
+
+/**
+ * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_tt
+ *
+ * Select the correct function for and make sure the TTM pages are
+ * visible to the device. Allocate storage for the device mappings.
+ * If a mapping has already been performed, indicated by the storage
+ * pointer being non NULL, the function returns success.
+ */
+static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
+{
+ struct vmw_private *dev_priv = vmw_tt->dev_priv;
+ struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
+ struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
+ struct vmw_piter iter;
+ dma_addr_t old;
+ int ret = 0;
+ static size_t sgl_size;
+ static size_t sgt_size;
+
+ if (vmw_tt->mapped)
+ return 0;
+
+ vsgt->mode = dev_priv->map_mode;
+ vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
+ vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
+ vsgt->addrs = vmw_tt->dma_ttm.dma_address;
+ vsgt->sgt = &vmw_tt->sgt;
+
+ switch (dev_priv->map_mode) {
+ case vmw_dma_map_bind:
+ case vmw_dma_map_populate:
+ if (unlikely(!sgl_size)) {
+ sgl_size = ttm_round_pot(sizeof(struct scatterlist));
+ sgt_size = ttm_round_pot(sizeof(struct sg_table));
+ }
+ vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
+ ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, false,
+ true);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
+ vsgt->num_pages, 0,
+ (unsigned long)
+ vsgt->num_pages << PAGE_SHIFT,
+ GFP_KERNEL);
+ if (unlikely(ret != 0))
+ goto out_sg_alloc_fail;
+
+ if (vsgt->num_pages > vmw_tt->sgt.nents) {
+ uint64_t over_alloc =
+ sgl_size * (vsgt->num_pages -
+ vmw_tt->sgt.nents);
+
+ ttm_mem_global_free(glob, over_alloc);
+ vmw_tt->sg_alloc_size -= over_alloc;
+ }
+
+ ret = vmw_ttm_map_for_dma(vmw_tt);
+ if (unlikely(ret != 0))
+ goto out_map_fail;
+
+ break;
+ default:
+ break;
+ }
+
+ old = ~((dma_addr_t) 0);
+ vmw_tt->vsgt.num_regions = 0;
+ for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
+ dma_addr_t cur = vmw_piter_dma_addr(&iter);
+
+ if (cur != old + PAGE_SIZE)
+ vmw_tt->vsgt.num_regions++;
+ old = cur;
+ }
+
+ vmw_tt->mapped = true;
+ return 0;
+
+out_map_fail:
+ sg_free_table(vmw_tt->vsgt.sgt);
+ vmw_tt->vsgt.sgt = NULL;
+out_sg_alloc_fail:
+ ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
+ return ret;
+}
+
+/**
+ * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_tt
+ *
+ * Tear down any previously set up device DMA mappings and free
+ * any storage space allocated for them. If there are no mappings set up,
+ * this function is a NOP.
+ */
+static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
+{
+ struct vmw_private *dev_priv = vmw_tt->dev_priv;
+
+ if (!vmw_tt->vsgt.sgt)
+ return;
+
+ switch (dev_priv->map_mode) {
+ case vmw_dma_map_bind:
+ case vmw_dma_map_populate:
+ vmw_ttm_unmap_from_dma(vmw_tt);
+ sg_free_table(vmw_tt->vsgt.sgt);
+ vmw_tt->vsgt.sgt = NULL;
+ ttm_mem_global_free(vmw_mem_glob(dev_priv),
+ vmw_tt->sg_alloc_size);
+ break;
+ default:
+ break;
+ }
+ vmw_tt->mapped = false;
+}
+
+
+/**
+ * vmw_bo_map_dma - Make sure buffer object pages are visible to the device
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Wrapper around vmw_ttm_map_dma, that takes a TTM buffer object pointer
+ * instead of a pointer to a struct vmw_ttm_backend as argument.
+ * Note that the buffer object must be either pinned or reserved before
+ * calling this function.
+ */
+int vmw_bo_map_dma(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ return vmw_ttm_map_dma(vmw_tt);
+}
+
+
+/**
+ * vmw_bo_unmap_dma - Make sure buffer object pages are visible to the device
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Wrapper around vmw_ttm_unmap_dma, that takes a TTM buffer object pointer
+ * instead of a pointer to a struct vmw_ttm_backend as argument.
+ */
+void vmw_bo_unmap_dma(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ vmw_ttm_unmap_dma(vmw_tt);
+}
+
+
+/**
+ * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
+ * TTM buffer object
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Returns a pointer to a struct vmw_sg_table object. The object should
+ * not be freed after use.
+ * Note that for the device addresses to be valid, the buffer object must
+ * either be reserved or pinned.
+ */
+const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ return &vmw_tt->vsgt;
+}
+
+
+static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
+{
+ struct vmw_ttm_tt *vmw_be =
+ container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+ int ret;
+
+ ret = vmw_ttm_map_dma(vmw_be);
+ if (unlikely(ret != 0))
+ return ret;
+
+ vmw_be->gmr_id = bo_mem->start;
+ vmw_be->mem_type = bo_mem->mem_type;
+
+ switch (bo_mem->mem_type) {
+ case VMW_PL_GMR:
+ return vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
+ ttm->num_pages, vmw_be->gmr_id);
+ case VMW_PL_MOB:
+ if (unlikely(vmw_be->mob == NULL)) {
+ vmw_be->mob =
+ vmw_mob_create(ttm->num_pages);
+ if (unlikely(vmw_be->mob == NULL))
+ return -ENOMEM;
+ }
+
+ return vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
+ &vmw_be->vsgt, ttm->num_pages,
+ vmw_be->gmr_id);
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static int vmw_ttm_unbind(struct ttm_tt *ttm)
+{
+ struct vmw_ttm_tt *vmw_be =
+ container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ switch (vmw_be->mem_type) {
+ case VMW_PL_GMR:
+ vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
+ break;
+ case VMW_PL_MOB:
+ vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
+ break;
+ default:
+ BUG();
+ }
+
+ if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
+ vmw_ttm_unmap_dma(vmw_be);
+
+ return 0;
+}
+
+
+static void vmw_ttm_destroy(struct ttm_tt *ttm)
+{
+ struct vmw_ttm_tt *vmw_be =
+ container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ vmw_ttm_unmap_dma(vmw_be);
+ if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
+ ttm_dma_tt_fini(&vmw_be->dma_ttm);
+ else
+ ttm_tt_fini(ttm);
+
+ if (vmw_be->mob)
+ vmw_mob_destroy(vmw_be->mob);
+
+ kfree(vmw_be);
+}
+
+
+static int vmw_ttm_populate(struct ttm_tt *ttm)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+ struct vmw_private *dev_priv = vmw_tt->dev_priv;
+ struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
+ int ret;
+
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
+ size_t size =
+ ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
+ ret = ttm_mem_global_alloc(glob, size, false, true);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
+ if (unlikely(ret != 0))
+ ttm_mem_global_free(glob, size);
+ } else
+ ret = ttm_pool_populate(ttm);
+
+ return ret;
+}
+
+static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
+{
+ struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
+ dma_ttm.ttm);
+ struct vmw_private *dev_priv = vmw_tt->dev_priv;
+ struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
+
+
+ if (vmw_tt->mob) {
+ vmw_mob_destroy(vmw_tt->mob);
+ vmw_tt->mob = NULL;
+ }
+
+ vmw_ttm_unmap_dma(vmw_tt);
+ if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
+ size_t size =
+ ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
+
+ ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
+ ttm_mem_global_free(glob, size);
+ } else
+ ttm_pool_unpopulate(ttm);
+}
+
+static struct ttm_backend_func vmw_ttm_func = {
+ .bind = vmw_ttm_bind,
+ .unbind = vmw_ttm_unbind,
+ .destroy = vmw_ttm_destroy,
+};
+
+static 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_tt *vmw_be;
+ int ret;
+
+ vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
+ if (!vmw_be)
+ return NULL;
+
+ vmw_be->dma_ttm.ttm.func = &vmw_ttm_func;
+ vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
+ vmw_be->mob = NULL;
+
+ if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
+ ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bdev, size, page_flags,
+ dummy_read_page);
+ else
+ ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bdev, size, page_flags,
+ dummy_read_page);
+ if (unlikely(ret != 0))
+ goto out_no_init;
+
+ return &vmw_be->dma_ttm.ttm;
+out_no_init:
+ kfree(vmw_be);
+ return NULL;
+}
+
+static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
+{
+ return 0;
+}
+
+static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
+ struct ttm_mem_type_manager *man)
+{
+ switch (type) {
+ case TTM_PL_SYSTEM:
+ /* System memory */
+
+ man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
+ man->available_caching = TTM_PL_FLAG_CACHED;
+ man->default_caching = TTM_PL_FLAG_CACHED;
+ break;
+ case TTM_PL_VRAM:
+ /* "On-card" video ram */
+ man->func = &ttm_bo_manager_func;
+ man->gpu_offset = 0;
+ man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
+ man->available_caching = TTM_PL_FLAG_CACHED;
+ man->default_caching = TTM_PL_FLAG_CACHED;
+ break;
+ case VMW_PL_GMR:
+ case VMW_PL_MOB:
+ /*
+ * "Guest Memory Regions" is an aperture like feature with
+ * one slot per bo. There is an upper limit of the number of
+ * slots as well as the bo size.
+ */
+ man->func = &vmw_gmrid_manager_func;
+ man->gpu_offset = 0;
+ man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
+ man->available_caching = TTM_PL_FLAG_CACHED;
+ man->default_caching = TTM_PL_FLAG_CACHED;
+ break;
+ default:
+ DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void vmw_evict_flags(struct ttm_buffer_object *bo,
+ struct ttm_placement *placement)
+{
+ *placement = vmw_sys_placement;
+}
+
+static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
+{
+ struct ttm_object_file *tfile =
+ vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
+
+ return vmw_user_dmabuf_verify_access(bo, tfile);
+}
+
+static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+ struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
+
+ mem->bus.addr = NULL;
+ mem->bus.is_iomem = false;
+ mem->bus.offset = 0;
+ mem->bus.size = mem->num_pages << PAGE_SHIFT;
+ mem->bus.base = 0;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+ return -EINVAL;
+ switch (mem->mem_type) {
+ case TTM_PL_SYSTEM:
+ case VMW_PL_GMR:
+ case VMW_PL_MOB:
+ return 0;
+ case TTM_PL_VRAM:
+ mem->bus.offset = mem->start << PAGE_SHIFT;
+ mem->bus.base = dev_priv->vram_start;
+ mem->bus.is_iomem = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+
+static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
+{
+ return 0;
+}
+
+/**
+ * vmw_move_notify - TTM move_notify_callback
+ *
+ * @bo: The TTM buffer object about to move.
+ * @mem: The truct ttm_mem_reg indicating to what memory
+ * region the move is taking place.
+ *
+ * Calls move_notify for all subsystems needing it.
+ * (currently only resources).
+ */
+static void vmw_move_notify(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem)
+{
+ vmw_resource_move_notify(bo, mem);
+}
+
+
+/**
+ * vmw_swap_notify - TTM move_notify_callback
+ *
+ * @bo: The TTM buffer object about to be swapped out.
+ */
+static void vmw_swap_notify(struct ttm_buffer_object *bo)
+{
+ ttm_bo_wait(bo, false, false, false);
+}
+
+
+struct ttm_bo_driver vmw_bo_driver = {
+ .ttm_tt_create = &vmw_ttm_tt_create,
+ .ttm_tt_populate = &vmw_ttm_populate,
+ .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
+ .invalidate_caches = vmw_invalidate_caches,
+ .init_mem_type = vmw_init_mem_type,
+ .evict_flags = vmw_evict_flags,
+ .move = NULL,
+ .verify_access = vmw_verify_access,
+ .move_notify = vmw_move_notify,
+ .swap_notify = vmw_swap_notify,
+ .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
+ .io_mem_reserve = &vmw_ttm_io_mem_reserve,
+ .io_mem_free = &vmw_ttm_io_mem_free,
+};