linux/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
Sam Ravnborg 6ae8748bf7 drm/vmwgfx: drop reminaing users of drmP.h
Drop use of the deprecated drmP.h file from the
remaining files.
In several cases the drmP.h include could be removed without
furter fixes. Other files required a few header files to be added.

In all files divided includes files in blocks and sort them.

v2:
- fix warning in i386 build wiht HIGHMEM disabled

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reported-by: kbuild test robot <lkp@intel.com> [warning in i386 build]
Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
2019-08-15 08:40:04 +02:00

706 lines
19 KiB
C

// 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;
}