OpenCloudOS-Kernel/drivers/gpu/drm/vmwgfx/vmwgfx_gem.c

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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright 2021 VMware, Inc.
*
* 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* 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/drm_prime.h"
#include "drm/drm_gem_ttm_helper.h"
/**
* vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
* vmw_buffer_object.
*
* @bo: Pointer to the TTM buffer object.
* Return: Pointer to the struct vmw_buffer_object embedding the
* TTM buffer object.
*/
static struct vmw_buffer_object *
vmw_buffer_object(struct ttm_buffer_object *bo)
{
return container_of(bo, struct vmw_buffer_object, base);
}
static void vmw_gem_object_free(struct drm_gem_object *gobj)
{
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj);
if (bo) {
ttm_bo_put(bo);
}
}
static int vmw_gem_object_open(struct drm_gem_object *obj,
struct drm_file *file_priv)
{
return 0;
}
static void vmw_gem_object_close(struct drm_gem_object *obj,
struct drm_file *file_priv)
{
}
static int vmw_gem_pin_private(struct drm_gem_object *obj, bool do_pin)
{
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
struct vmw_buffer_object *vbo = vmw_buffer_object(bo);
int ret;
ret = ttm_bo_reserve(bo, false, false, NULL);
if (unlikely(ret != 0))
goto err;
vmw_bo_pin_reserved(vbo, do_pin);
ttm_bo_unreserve(bo);
err:
return ret;
}
static int vmw_gem_object_pin(struct drm_gem_object *obj)
{
return vmw_gem_pin_private(obj, true);
}
static void vmw_gem_object_unpin(struct drm_gem_object *obj)
{
vmw_gem_pin_private(obj, false);
}
static struct sg_table *vmw_gem_object_get_sg_table(struct drm_gem_object *obj)
{
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
struct vmw_ttm_tt *vmw_tt =
container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
if (vmw_tt->vsgt.sgt)
return vmw_tt->vsgt.sgt;
return drm_prime_pages_to_sg(obj->dev, vmw_tt->dma_ttm.pages, vmw_tt->dma_ttm.num_pages);
}
static const struct drm_gem_object_funcs vmw_gem_object_funcs = {
.free = vmw_gem_object_free,
.open = vmw_gem_object_open,
.close = vmw_gem_object_close,
.print_info = drm_gem_ttm_print_info,
.pin = vmw_gem_object_pin,
.unpin = vmw_gem_object_unpin,
.get_sg_table = vmw_gem_object_get_sg_table,
.vmap = drm_gem_ttm_vmap,
.vunmap = drm_gem_ttm_vunmap,
.mmap = drm_gem_ttm_mmap,
};
/**
* vmw_gem_destroy - vmw buffer object destructor
*
* @bo: Pointer to the embedded struct ttm_buffer_object
*/
void vmw_gem_destroy(struct ttm_buffer_object *bo)
{
struct vmw_buffer_object *vbo = vmw_buffer_object(bo);
WARN_ON(vbo->dirty);
WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
vmw_bo_unmap(vbo);
drm_gem_object_release(&vbo->base.base);
kfree(vbo);
}
int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv,
struct drm_file *filp,
uint32_t size,
uint32_t *handle,
struct vmw_buffer_object **p_vbo)
{
int ret;
ret = vmw_bo_create(dev_priv, size,
(dev_priv->has_mob) ?
&vmw_sys_placement :
&vmw_vram_sys_placement,
true, false, &vmw_gem_destroy, p_vbo);
(*p_vbo)->base.base.funcs = &vmw_gem_object_funcs;
if (ret != 0)
goto out_no_bo;
ret = drm_gem_handle_create(filp, &(*p_vbo)->base.base, handle);
/* drop reference from allocate - handle holds it now */
drm_gem_object_put(&(*p_vbo)->base.base);
out_no_bo:
return ret;
}
int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
{
struct vmw_private *dev_priv = vmw_priv(dev);
union drm_vmw_alloc_dmabuf_arg *arg =
(union drm_vmw_alloc_dmabuf_arg *)data;
struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
struct drm_vmw_dmabuf_rep *rep = &arg->rep;
struct vmw_buffer_object *vbo;
uint32_t handle;
int ret;
ret = vmw_gem_object_create_with_handle(dev_priv, filp,
req->size, &handle, &vbo);
if (ret)
goto out_no_bo;
rep->handle = handle;
rep->map_handle = drm_vma_node_offset_addr(&vbo->base.base.vma_node);
rep->cur_gmr_id = handle;
rep->cur_gmr_offset = 0;
out_no_bo:
return ret;
}
#if defined(CONFIG_DEBUG_FS)
static void vmw_bo_print_info(int id, struct vmw_buffer_object *bo, struct seq_file *m)
{
const char *placement;
const char *type;
switch (bo->base.resource->mem_type) {
case TTM_PL_SYSTEM:
placement = " CPU";
break;
case VMW_PL_GMR:
placement = " GMR";
break;
case VMW_PL_MOB:
placement = " MOB";
break;
case VMW_PL_SYSTEM:
placement = "VCPU";
break;
case TTM_PL_VRAM:
placement = "VRAM";
break;
default:
placement = "None";
break;
}
switch (bo->base.type) {
case ttm_bo_type_device:
type = "device";
break;
case ttm_bo_type_kernel:
type = "kernel";
break;
case ttm_bo_type_sg:
type = "sg ";
break;
default:
type = "none ";
break;
}
seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s",
id, bo->base.base.size, placement, type);
seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
bo->base.priority,
bo->base.pin_count,
kref_read(&bo->base.base.refcount),
kref_read(&bo->base.kref));
seq_puts(m, "\n");
}
static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused)
{
struct vmw_private *vdev = (struct vmw_private *)m->private;
struct drm_device *dev = &vdev->drm;
struct drm_file *file;
int r;
r = mutex_lock_interruptible(&dev->filelist_mutex);
if (r)
return r;
list_for_each_entry(file, &dev->filelist, lhead) {
struct task_struct *task;
struct drm_gem_object *gobj;
int id;
/*
* Although we have a valid reference on file->pid, that does
* not guarantee that the task_struct who called get_pid() is
* still alive (e.g. get_pid(current) => fork() => exit()).
* Therefore, we need to protect this ->comm access using RCU.
*/
rcu_read_lock();
task = pid_task(file->pid, PIDTYPE_PID);
seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid),
task ? task->comm : "<unknown>");
rcu_read_unlock();
spin_lock(&file->table_lock);
idr_for_each_entry(&file->object_idr, gobj, id) {
struct vmw_buffer_object *bo = gem_to_vmw_bo(gobj);
vmw_bo_print_info(id, bo, m);
}
spin_unlock(&file->table_lock);
}
mutex_unlock(&dev->filelist_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);
#endif
void vmw_debugfs_gem_init(struct vmw_private *vdev)
{
#if defined(CONFIG_DEBUG_FS)
struct drm_minor *minor = vdev->drm.primary;
struct dentry *root = minor->debugfs_root;
debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev,
&vmw_debugfs_gem_info_fops);
#endif
}