/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright (c) 2021-2024 Broadcom. All Rights Reserved. The term
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*
* 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_bo.h"
#include "vmwgfx_drv.h"
#include "drm/drm_prime.h"
#include "drm/drm_gem_ttm_helper.h"
#include <linux/debugfs.h>
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_object_pin(struct drm_gem_object *obj)
{
struct vmw_bo *vbo = to_vmw_bo(obj);
vmw_bo_pin_reserved(vbo, true);
return 0;
}
static void vmw_gem_object_unpin(struct drm_gem_object *obj)
{
struct vmw_bo *vbo = to_vmw_bo(obj);
vmw_bo_pin_reserved(vbo, 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 int vmw_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
{
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
int ret;
if (obj->import_attach) {
ret = dma_buf_vmap(obj->import_attach->dmabuf, map);
if (!ret) {
if (drm_WARN_ON(obj->dev, map->is_iomem)) {
dma_buf_vunmap(obj->import_attach->dmabuf, map);
return -EIO;
}
}
} else {
ret = ttm_bo_vmap(bo, map);
}
return ret;
}
static void vmw_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
{
if (obj->import_attach)
dma_buf_vunmap(obj->import_attach->dmabuf, map);
else
drm_gem_ttm_vunmap(obj, map);
}
static int vmw_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{
int ret;
if (obj->import_attach) {
/*
* Reset both vm_ops and vm_private_data, so we don't end up with
* vm_ops pointing to our implementation if the dma-buf backend
* doesn't set those fields.
*/
vma->vm_private_data = NULL;
vma->vm_ops = NULL;
ret = dma_buf_mmap(obj->dma_buf, vma, 0);
/* Drop the reference drm_gem_mmap_obj() acquired.*/
if (!ret)
drm_gem_object_put(obj);
return ret;
}
return drm_gem_ttm_mmap(obj, vma);
}
static const struct vm_operations_struct vmw_vm_ops = {
.pfn_mkwrite = vmw_bo_vm_mkwrite,
.page_mkwrite = vmw_bo_vm_mkwrite,
.fault = vmw_bo_vm_fault,
.open = ttm_bo_vm_open,
.close = ttm_bo_vm_close,
};
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 = vmw_gem_vmap,
.vunmap = vmw_gem_vunmap,
.mmap = vmw_gem_mmap,
.vm_ops = &vmw_vm_ops,
};
int vmw_gem_object_create(struct vmw_private *vmw,
struct vmw_bo_params *params,
struct vmw_bo **p_vbo)
{
int ret = vmw_bo_create(vmw, params, p_vbo);
if (ret != 0)
goto out_no_bo;
(*p_vbo)->tbo.base.funcs = &vmw_gem_object_funcs;
out_no_bo:
return ret;
}
int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv,
struct drm_file *filp,
uint32_t size,
uint32_t *handle,
struct vmw_bo **p_vbo)
{
int ret;
struct vmw_bo_params params = {
.domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM,
.busy_domain = VMW_BO_DOMAIN_SYS,
.bo_type = ttm_bo_type_device,
.size = size,
.pin = false
};
ret = vmw_gem_object_create(dev_priv, ¶ms, p_vbo);
if (ret != 0)
goto out_no_bo;
ret = drm_gem_handle_create(filp, &(*p_vbo)->tbo.base, handle);
out_no_bo:
return ret;
}
struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *table)
{
int ret;
struct vmw_private *dev_priv = vmw_priv(dev);
struct drm_gem_object *gem = NULL;
struct vmw_bo *vbo;
struct vmw_bo_params params = {
.domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM,
.busy_domain = VMW_BO_DOMAIN_SYS,
.bo_type = ttm_bo_type_sg,
.size = attach->dmabuf->size,
.pin = false,
.resv = attach->dmabuf->resv,
.sg = table,
};
dma_resv_lock(params.resv, NULL);
ret = vmw_bo_create(dev_priv, ¶ms, &vbo);
if (ret != 0)
goto out_no_bo;
vbo->tbo.base.funcs = &vmw_gem_object_funcs;
gem = &vbo->tbo.base;
out_no_bo:
dma_resv_unlock(params.resv);
return gem;
}
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_bo *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->tbo.base.vma_node);
rep->cur_gmr_id = handle;
rep->cur_gmr_offset = 0;
/* drop reference from allocate - handle holds it now */
drm_gem_object_put(&vbo->tbo.base);
out_no_bo:
return ret;
}
#if defined(CONFIG_DEBUG_FS)
static void vmw_bo_print_info(int id, struct vmw_bo *bo, struct seq_file *m)
{
const char *placement;
const char *type;
switch (bo->tbo.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->tbo.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->tbo.base.size, placement, type);
seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
bo->tbo.priority,
bo->tbo.pin_count,
kref_read(&bo->tbo.base.refcount),
kref_read(&bo->tbo.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;
struct pid *pid;
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();
pid = rcu_dereference(file->pid);
task = pid_task(pid, PIDTYPE_TGID);
seq_printf(m, "pid %8d command %s:\n", pid_nr(pid),
task ? task->comm : "<unknown>");
rcu_read_unlock();
spin_lock(&file->table_lock);
idr_for_each_entry(&file->object_idr, gobj, id) {
struct vmw_bo *bo = 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
}
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