ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c b/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
new file mode 100644
index 0000000..0a6bbac
--- /dev/null
+++ b/marvell/linux/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
@@ -0,0 +1,705 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2012-2015 VMware, Inc., Palo Alto, CA., USA
+ *
+ * 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 <linux/highmem.h>
+
+#include "vmwgfx_drv.h"
+
+/*
+ * If we set up the screen target otable, screen objects stop working.
+ */
+
+#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE ? 0 : 1))
+
+#ifdef CONFIG_64BIT
+#define VMW_PPN_SIZE 8
+#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH64_0
+#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH64_1
+#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH64_2
+#else
+#define VMW_PPN_SIZE 4
+#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH_0
+#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH_1
+#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH_2
+#endif
+
+/*
+ * struct vmw_mob - Structure containing page table and metadata for a
+ * Guest Memory OBject.
+ *
+ * @num_pages Number of pages that make up the page table.
+ * @pt_level The indirection level of the page table. 0-2.
+ * @pt_root_page DMA address of the level 0 page of the page table.
+ */
+struct vmw_mob {
+ struct ttm_buffer_object *pt_bo;
+ unsigned long num_pages;
+ unsigned pt_level;
+ dma_addr_t pt_root_page;
+ uint32_t id;
+};
+
+/*
+ * struct vmw_otable - Guest Memory OBject table metadata
+ *
+ * @size: Size of the table (page-aligned).
+ * @page_table: Pointer to a struct vmw_mob holding the page table.
+ */
+static const struct vmw_otable pre_dx_tables[] = {
+ {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE,
+ NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}
+};
+
+static const struct vmw_otable dx_tables[] = {
+ {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true},
+ {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE,
+ NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE},
+ {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true},
+};
+
+static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
+ struct vmw_mob *mob);
+static void vmw_mob_pt_setup(struct vmw_mob *mob,
+ struct vmw_piter data_iter,
+ unsigned long num_data_pages);
+
+/*
+ * vmw_setup_otable_base - Issue an object table base setup command to
+ * the device
+ *
+ * @dev_priv: Pointer to a device private structure
+ * @type: Type of object table base
+ * @offset Start of table offset into dev_priv::otable_bo
+ * @otable Pointer to otable metadata;
+ *
+ * This function returns -ENOMEM if it fails to reserve fifo space,
+ * and may block waiting for fifo space.
+ */
+static int vmw_setup_otable_base(struct vmw_private *dev_priv,
+ SVGAOTableType type,
+ struct ttm_buffer_object *otable_bo,
+ unsigned long offset,
+ struct vmw_otable *otable)
+{
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdSetOTableBase64 body;
+ } *cmd;
+ struct vmw_mob *mob;
+ const struct vmw_sg_table *vsgt;
+ struct vmw_piter iter;
+ int ret;
+
+ BUG_ON(otable->page_table != NULL);
+
+ vsgt = vmw_bo_sg_table(otable_bo);
+ vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT);
+ WARN_ON(!vmw_piter_next(&iter));
+
+ mob = vmw_mob_create(otable->size >> PAGE_SHIFT);
+ if (unlikely(mob == NULL)) {
+ DRM_ERROR("Failed creating OTable page table.\n");
+ return -ENOMEM;
+ }
+
+ if (otable->size <= PAGE_SIZE) {
+ mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
+ mob->pt_root_page = vmw_piter_dma_addr(&iter);
+ } else if (vsgt->num_regions == 1) {
+ mob->pt_level = SVGA3D_MOBFMT_RANGE;
+ mob->pt_root_page = vmw_piter_dma_addr(&iter);
+ } else {
+ ret = vmw_mob_pt_populate(dev_priv, mob);
+ if (unlikely(ret != 0))
+ goto out_no_populate;
+
+ vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT);
+ mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1;
+ }
+
+ cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL)) {
+ ret = -ENOMEM;
+ goto out_no_fifo;
+ }
+
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.type = type;
+ cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT;
+ cmd->body.sizeInBytes = otable->size;
+ cmd->body.validSizeInBytes = 0;
+ cmd->body.ptDepth = mob->pt_level;
+
+ /*
+ * The device doesn't support this, But the otable size is
+ * determined at compile-time, so this BUG shouldn't trigger
+ * randomly.
+ */
+ BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2);
+
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+ otable->page_table = mob;
+
+ return 0;
+
+out_no_fifo:
+out_no_populate:
+ vmw_mob_destroy(mob);
+ return ret;
+}
+
+/*
+ * vmw_takedown_otable_base - Issue an object table base takedown command
+ * to the device
+ *
+ * @dev_priv: Pointer to a device private structure
+ * @type: Type of object table base
+ *
+ */
+static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
+ SVGAOTableType type,
+ struct vmw_otable *otable)
+{
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdSetOTableBase body;
+ } *cmd;
+ struct ttm_buffer_object *bo;
+
+ if (otable->page_table == NULL)
+ return;
+
+ bo = otable->page_table->pt_bo;
+ cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL))
+ return;
+
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.type = type;
+ cmd->body.baseAddress = 0;
+ cmd->body.sizeInBytes = 0;
+ cmd->body.validSizeInBytes = 0;
+ cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ if (bo) {
+ int ret;
+
+ ret = ttm_bo_reserve(bo, false, true, NULL);
+ BUG_ON(ret != 0);
+
+ vmw_bo_fence_single(bo, NULL);
+ ttm_bo_unreserve(bo);
+ }
+
+ vmw_mob_destroy(otable->page_table);
+ otable->page_table = NULL;
+}
+
+
+static int vmw_otable_batch_setup(struct vmw_private *dev_priv,
+ struct vmw_otable_batch *batch)
+{
+ unsigned long offset;
+ unsigned long bo_size;
+ struct vmw_otable *otables = batch->otables;
+ struct ttm_operation_ctx ctx = {
+ .interruptible = false,
+ .no_wait_gpu = false
+ };
+ SVGAOTableType i;
+ int ret;
+
+ bo_size = 0;
+ for (i = 0; i < batch->num_otables; ++i) {
+ if (!otables[i].enabled)
+ continue;
+
+ otables[i].size =
+ (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK;
+ bo_size += otables[i].size;
+ }
+
+ ret = ttm_bo_create(&dev_priv->bdev, bo_size,
+ ttm_bo_type_device,
+ &vmw_sys_ne_placement,
+ 0, false, &batch->otable_bo);
+
+ if (unlikely(ret != 0))
+ goto out_no_bo;
+
+ ret = ttm_bo_reserve(batch->otable_bo, false, true, NULL);
+ BUG_ON(ret != 0);
+ ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm, &ctx);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+ ret = vmw_bo_map_dma(batch->otable_bo);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+
+ ttm_bo_unreserve(batch->otable_bo);
+
+ offset = 0;
+ for (i = 0; i < batch->num_otables; ++i) {
+ if (!batch->otables[i].enabled)
+ continue;
+
+ ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo,
+ offset,
+ &otables[i]);
+ if (unlikely(ret != 0))
+ goto out_no_setup;
+ offset += otables[i].size;
+ }
+
+ return 0;
+
+out_unreserve:
+ ttm_bo_unreserve(batch->otable_bo);
+out_no_setup:
+ for (i = 0; i < batch->num_otables; ++i) {
+ if (batch->otables[i].enabled)
+ vmw_takedown_otable_base(dev_priv, i,
+ &batch->otables[i]);
+ }
+
+ ttm_bo_put(batch->otable_bo);
+ batch->otable_bo = NULL;
+out_no_bo:
+ return ret;
+}
+
+/*
+ * vmw_otables_setup - Set up guest backed memory object tables
+ *
+ * @dev_priv: Pointer to a device private structure
+ *
+ * Takes care of the device guest backed surface
+ * initialization, by setting up the guest backed memory object tables.
+ * Returns 0 on success and various error codes on failure. A successful return
+ * means the object tables can be taken down using the vmw_otables_takedown
+ * function.
+ */
+int vmw_otables_setup(struct vmw_private *dev_priv)
+{
+ struct vmw_otable **otables = &dev_priv->otable_batch.otables;
+ int ret;
+
+ if (dev_priv->has_dx) {
+ *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL);
+ if (!(*otables))
+ return -ENOMEM;
+
+ dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables);
+ } else {
+ *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables),
+ GFP_KERNEL);
+ if (!(*otables))
+ return -ENOMEM;
+
+ dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables);
+ }
+
+ ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch);
+ if (unlikely(ret != 0))
+ goto out_setup;
+
+ return 0;
+
+out_setup:
+ kfree(*otables);
+ return ret;
+}
+
+static void vmw_otable_batch_takedown(struct vmw_private *dev_priv,
+ struct vmw_otable_batch *batch)
+{
+ SVGAOTableType i;
+ struct ttm_buffer_object *bo = batch->otable_bo;
+ int ret;
+
+ for (i = 0; i < batch->num_otables; ++i)
+ if (batch->otables[i].enabled)
+ vmw_takedown_otable_base(dev_priv, i,
+ &batch->otables[i]);
+
+ ret = ttm_bo_reserve(bo, false, true, NULL);
+ BUG_ON(ret != 0);
+
+ vmw_bo_fence_single(bo, NULL);
+ ttm_bo_unreserve(bo);
+
+ ttm_bo_put(batch->otable_bo);
+ batch->otable_bo = NULL;
+}
+
+/*
+ * vmw_otables_takedown - Take down guest backed memory object tables
+ *
+ * @dev_priv: Pointer to a device private structure
+ *
+ * Take down the Guest Memory Object tables.
+ */
+void vmw_otables_takedown(struct vmw_private *dev_priv)
+{
+ vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch);
+ kfree(dev_priv->otable_batch.otables);
+}
+
+/*
+ * vmw_mob_calculate_pt_pages - Calculate the number of page table pages
+ * needed for a guest backed memory object.
+ *
+ * @data_pages: Number of data pages in the memory object buffer.
+ */
+static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages)
+{
+ unsigned long data_size = data_pages * PAGE_SIZE;
+ unsigned long tot_size = 0;
+
+ while (likely(data_size > PAGE_SIZE)) {
+ data_size = DIV_ROUND_UP(data_size, PAGE_SIZE);
+ data_size *= VMW_PPN_SIZE;
+ tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK;
+ }
+
+ return tot_size >> PAGE_SHIFT;
+}
+
+/*
+ * vmw_mob_create - Create a mob, but don't populate it.
+ *
+ * @data_pages: Number of data pages of the underlying buffer object.
+ */
+struct vmw_mob *vmw_mob_create(unsigned long data_pages)
+{
+ struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL);
+
+ if (unlikely(!mob))
+ return NULL;
+
+ mob->num_pages = vmw_mob_calculate_pt_pages(data_pages);
+
+ return mob;
+}
+
+/*
+ * vmw_mob_pt_populate - Populate the mob pagetable
+ *
+ * @mob: Pointer to the mob the pagetable of which we want to
+ * populate.
+ *
+ * This function allocates memory to be used for the pagetable, and
+ * adjusts TTM memory accounting accordingly. Returns ENOMEM if
+ * memory resources aren't sufficient and may cause TTM buffer objects
+ * to be swapped out by using the TTM memory accounting function.
+ */
+static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
+ struct vmw_mob *mob)
+{
+ int ret;
+ struct ttm_operation_ctx ctx = {
+ .interruptible = false,
+ .no_wait_gpu = false
+ };
+
+ BUG_ON(mob->pt_bo != NULL);
+
+ ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE,
+ ttm_bo_type_device,
+ &vmw_sys_ne_placement,
+ 0, false, &mob->pt_bo);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL);
+
+ BUG_ON(ret != 0);
+ ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm, &ctx);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+ ret = vmw_bo_map_dma(mob->pt_bo);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+
+ ttm_bo_unreserve(mob->pt_bo);
+
+ return 0;
+
+out_unreserve:
+ ttm_bo_unreserve(mob->pt_bo);
+ ttm_bo_put(mob->pt_bo);
+ mob->pt_bo = NULL;
+
+ return ret;
+}
+
+/**
+ * vmw_mob_assign_ppn - Assign a value to a page table entry
+ *
+ * @addr: Pointer to pointer to page table entry.
+ * @val: The page table entry
+ *
+ * Assigns a value to a page table entry pointed to by *@addr and increments
+ * *@addr according to the page table entry size.
+ */
+#if (VMW_PPN_SIZE == 8)
+static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val)
+{
+ *((u64 *) *addr) = val >> PAGE_SHIFT;
+ *addr += 2;
+}
+#else
+static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val)
+{
+ *(*addr)++ = val >> PAGE_SHIFT;
+}
+#endif
+
+/*
+ * vmw_mob_build_pt - Build a pagetable
+ *
+ * @data_addr: Array of DMA addresses to the underlying buffer
+ * object's data pages.
+ * @num_data_pages: Number of buffer object data pages.
+ * @pt_pages: Array of page pointers to the page table pages.
+ *
+ * Returns the number of page table pages actually used.
+ * Uses atomic kmaps of highmem pages to avoid TLB thrashing.
+ */
+static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter,
+ unsigned long num_data_pages,
+ struct vmw_piter *pt_iter)
+{
+ unsigned long pt_size = num_data_pages * VMW_PPN_SIZE;
+ unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE);
+ unsigned long pt_page;
+ u32 *addr, *save_addr;
+ unsigned long i;
+ struct page *page;
+
+ for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) {
+ page = vmw_piter_page(pt_iter);
+
+ save_addr = addr = kmap_atomic(page);
+
+ for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) {
+ vmw_mob_assign_ppn(&addr,
+ vmw_piter_dma_addr(data_iter));
+ if (unlikely(--num_data_pages == 0))
+ break;
+ WARN_ON(!vmw_piter_next(data_iter));
+ }
+ kunmap_atomic(save_addr);
+ vmw_piter_next(pt_iter);
+ }
+
+ return num_pt_pages;
+}
+
+/*
+ * vmw_mob_build_pt - Set up a multilevel mob pagetable
+ *
+ * @mob: Pointer to a mob whose page table needs setting up.
+ * @data_addr Array of DMA addresses to the buffer object's data
+ * pages.
+ * @num_data_pages: Number of buffer object data pages.
+ *
+ * Uses tail recursion to set up a multilevel mob page table.
+ */
+static void vmw_mob_pt_setup(struct vmw_mob *mob,
+ struct vmw_piter data_iter,
+ unsigned long num_data_pages)
+{
+ unsigned long num_pt_pages = 0;
+ struct ttm_buffer_object *bo = mob->pt_bo;
+ struct vmw_piter save_pt_iter;
+ struct vmw_piter pt_iter;
+ const struct vmw_sg_table *vsgt;
+ int ret;
+
+ ret = ttm_bo_reserve(bo, false, true, NULL);
+ BUG_ON(ret != 0);
+
+ vsgt = vmw_bo_sg_table(bo);
+ vmw_piter_start(&pt_iter, vsgt, 0);
+ BUG_ON(!vmw_piter_next(&pt_iter));
+ mob->pt_level = 0;
+ while (likely(num_data_pages > 1)) {
+ ++mob->pt_level;
+ BUG_ON(mob->pt_level > 2);
+ save_pt_iter = pt_iter;
+ num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages,
+ &pt_iter);
+ data_iter = save_pt_iter;
+ num_data_pages = num_pt_pages;
+ }
+
+ mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter);
+ ttm_bo_unreserve(bo);
+}
+
+/*
+ * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary.
+ *
+ * @mob: Pointer to a mob to destroy.
+ */
+void vmw_mob_destroy(struct vmw_mob *mob)
+{
+ if (mob->pt_bo) {
+ ttm_bo_put(mob->pt_bo);
+ mob->pt_bo = NULL;
+ }
+ kfree(mob);
+}
+
+/*
+ * vmw_mob_unbind - Hide a mob from the device.
+ *
+ * @dev_priv: Pointer to a device private.
+ * @mob_id: Device id of the mob to unbind.
+ */
+void vmw_mob_unbind(struct vmw_private *dev_priv,
+ struct vmw_mob *mob)
+{
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdDestroyGBMob body;
+ } *cmd;
+ int ret;
+ struct ttm_buffer_object *bo = mob->pt_bo;
+
+ if (bo) {
+ ret = ttm_bo_reserve(bo, false, true, NULL);
+ /*
+ * Noone else should be using this buffer.
+ */
+ BUG_ON(ret != 0);
+ }
+
+ cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
+ if (cmd) {
+ cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.mobid = mob->id;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+ }
+
+ if (bo) {
+ vmw_bo_fence_single(bo, NULL);
+ ttm_bo_unreserve(bo);
+ }
+ vmw_fifo_resource_dec(dev_priv);
+}
+
+/*
+ * vmw_mob_bind - Make a mob visible to the device after first
+ * populating it if necessary.
+ *
+ * @dev_priv: Pointer to a device private.
+ * @mob: Pointer to the mob we're making visible.
+ * @data_addr: Array of DMA addresses to the data pages of the underlying
+ * buffer object.
+ * @num_data_pages: Number of data pages of the underlying buffer
+ * object.
+ * @mob_id: Device id of the mob to bind
+ *
+ * This function is intended to be interfaced with the ttm_tt backend
+ * code.
+ */
+int vmw_mob_bind(struct vmw_private *dev_priv,
+ struct vmw_mob *mob,
+ const struct vmw_sg_table *vsgt,
+ unsigned long num_data_pages,
+ int32_t mob_id)
+{
+ int ret;
+ bool pt_set_up = false;
+ struct vmw_piter data_iter;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdDefineGBMob64 body;
+ } *cmd;
+
+ mob->id = mob_id;
+ vmw_piter_start(&data_iter, vsgt, 0);
+ if (unlikely(!vmw_piter_next(&data_iter)))
+ return 0;
+
+ if (likely(num_data_pages == 1)) {
+ mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
+ mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
+ } else if (vsgt->num_regions == 1) {
+ mob->pt_level = SVGA3D_MOBFMT_RANGE;
+ mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
+ } else if (unlikely(mob->pt_bo == NULL)) {
+ ret = vmw_mob_pt_populate(dev_priv, mob);
+ if (unlikely(ret != 0))
+ return ret;
+
+ vmw_mob_pt_setup(mob, data_iter, num_data_pages);
+ pt_set_up = true;
+ mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1;
+ }
+
+ vmw_fifo_resource_inc(dev_priv);
+
+ cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL))
+ goto out_no_cmd_space;
+
+ cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.mobid = mob_id;
+ cmd->body.ptDepth = mob->pt_level;
+ cmd->body.base = mob->pt_root_page >> PAGE_SHIFT;
+ cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE;
+
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ return 0;
+
+out_no_cmd_space:
+ vmw_fifo_resource_dec(dev_priv);
+ if (pt_set_up) {
+ ttm_bo_put(mob->pt_bo);
+ mob->pt_bo = NULL;
+ }
+
+ return -ENOMEM;
+}