blob: c7c5612378832602944be4db2942336759ec549f [file] [log] [blame]
/*
* Copyright(c) 2011-2016 Intel Corporation. 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, 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 (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 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.
*
* Authors:
* Kevin Tian <kevin.tian@intel.com>
* Eddie Dong <eddie.dong@intel.com>
*
* Contributors:
* Niu Bing <bing.niu@intel.com>
* Zhi Wang <zhi.a.wang@intel.com>
*
*/
#include <linux/types.h>
#include <linux/kthread.h>
#include "i915_drv.h"
#include "intel_gvt.h"
#include "gvt.h"
#include <linux/vfio.h>
#include <linux/mdev.h>
struct intel_gvt_host intel_gvt_host;
static const char * const supported_hypervisors[] = {
[INTEL_GVT_HYPERVISOR_XEN] = "XEN",
[INTEL_GVT_HYPERVISOR_KVM] = "KVM",
};
static struct intel_vgpu_type *intel_gvt_find_vgpu_type(struct intel_gvt *gvt,
const char *name)
{
const char *driver_name =
dev_driver_string(&gvt->gt->i915->drm.pdev->dev);
int i;
name += strlen(driver_name) + 1;
for (i = 0; i < gvt->num_types; i++) {
struct intel_vgpu_type *t = &gvt->types[i];
if (!strncmp(t->name, name, sizeof(t->name)))
return t;
}
return NULL;
}
static ssize_t available_instances_show(struct kobject *kobj,
struct device *dev, char *buf)
{
struct intel_vgpu_type *type;
unsigned int num = 0;
void *gvt = kdev_to_i915(dev)->gvt;
type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
if (!type)
num = 0;
else
num = type->avail_instance;
return sprintf(buf, "%u\n", num);
}
static ssize_t device_api_show(struct kobject *kobj, struct device *dev,
char *buf)
{
return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
}
static ssize_t description_show(struct kobject *kobj, struct device *dev,
char *buf)
{
struct intel_vgpu_type *type;
void *gvt = kdev_to_i915(dev)->gvt;
type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
if (!type)
return 0;
return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n"
"fence: %d\nresolution: %s\n"
"weight: %d\n",
BYTES_TO_MB(type->low_gm_size),
BYTES_TO_MB(type->high_gm_size),
type->fence, vgpu_edid_str(type->resolution),
type->weight);
}
static MDEV_TYPE_ATTR_RO(available_instances);
static MDEV_TYPE_ATTR_RO(device_api);
static MDEV_TYPE_ATTR_RO(description);
static struct attribute *gvt_type_attrs[] = {
&mdev_type_attr_available_instances.attr,
&mdev_type_attr_device_api.attr,
&mdev_type_attr_description.attr,
NULL,
};
static struct attribute_group *gvt_vgpu_type_groups[] = {
[0 ... NR_MAX_INTEL_VGPU_TYPES - 1] = NULL,
};
static bool intel_get_gvt_attrs(struct attribute_group ***intel_vgpu_type_groups)
{
*intel_vgpu_type_groups = gvt_vgpu_type_groups;
return true;
}
static bool intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
{
int i, j;
struct intel_vgpu_type *type;
struct attribute_group *group;
for (i = 0; i < gvt->num_types; i++) {
type = &gvt->types[i];
group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL);
if (WARN_ON(!group))
goto unwind;
group->name = type->name;
group->attrs = gvt_type_attrs;
gvt_vgpu_type_groups[i] = group;
}
return true;
unwind:
for (j = 0; j < i; j++) {
group = gvt_vgpu_type_groups[j];
kfree(group);
}
return false;
}
static void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
{
int i;
struct attribute_group *group;
for (i = 0; i < gvt->num_types; i++) {
group = gvt_vgpu_type_groups[i];
gvt_vgpu_type_groups[i] = NULL;
kfree(group);
}
}
static const struct intel_gvt_ops intel_gvt_ops = {
.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
.emulate_mmio_read = intel_vgpu_emulate_mmio_read,
.emulate_mmio_write = intel_vgpu_emulate_mmio_write,
.vgpu_create = intel_gvt_create_vgpu,
.vgpu_destroy = intel_gvt_destroy_vgpu,
.vgpu_release = intel_gvt_release_vgpu,
.vgpu_reset = intel_gvt_reset_vgpu,
.vgpu_activate = intel_gvt_activate_vgpu,
.vgpu_deactivate = intel_gvt_deactivate_vgpu,
.gvt_find_vgpu_type = intel_gvt_find_vgpu_type,
.get_gvt_attrs = intel_get_gvt_attrs,
.vgpu_query_plane = intel_vgpu_query_plane,
.vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
.write_protect_handler = intel_vgpu_page_track_handler,
.emulate_hotplug = intel_vgpu_emulate_hotplug,
};
static void init_device_info(struct intel_gvt *gvt)
{
struct intel_gvt_device_info *info = &gvt->device_info;
struct pci_dev *pdev = gvt->gt->i915->drm.pdev;
info->max_support_vgpus = 8;
info->cfg_space_size = PCI_CFG_SPACE_EXP_SIZE;
info->mmio_size = 2 * 1024 * 1024;
info->mmio_bar = 0;
info->gtt_start_offset = 8 * 1024 * 1024;
info->gtt_entry_size = 8;
info->gtt_entry_size_shift = 3;
info->gmadr_bytes_in_cmd = 8;
info->max_surface_size = 36 * 1024 * 1024;
info->msi_cap_offset = pdev->msi_cap;
}
static int gvt_service_thread(void *data)
{
struct intel_gvt *gvt = (struct intel_gvt *)data;
int ret;
gvt_dbg_core("service thread start\n");
while (!kthread_should_stop()) {
ret = wait_event_interruptible(gvt->service_thread_wq,
kthread_should_stop() || gvt->service_request);
if (kthread_should_stop())
break;
if (WARN_ONCE(ret, "service thread is waken up by signal.\n"))
continue;
if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK,
(void *)&gvt->service_request))
intel_gvt_emulate_vblank(gvt);
if (test_bit(INTEL_GVT_REQUEST_SCHED,
(void *)&gvt->service_request) ||
test_bit(INTEL_GVT_REQUEST_EVENT_SCHED,
(void *)&gvt->service_request)) {
intel_gvt_schedule(gvt);
}
}
return 0;
}
static void clean_service_thread(struct intel_gvt *gvt)
{
kthread_stop(gvt->service_thread);
}
static int init_service_thread(struct intel_gvt *gvt)
{
init_waitqueue_head(&gvt->service_thread_wq);
gvt->service_thread = kthread_run(gvt_service_thread,
gvt, "gvt_service_thread");
if (IS_ERR(gvt->service_thread)) {
gvt_err("fail to start service thread.\n");
return PTR_ERR(gvt->service_thread);
}
return 0;
}
/**
* intel_gvt_clean_device - clean a GVT device
* @i915: i915 private
*
* This function is called at the driver unloading stage, to free the
* resources owned by a GVT device.
*
*/
void intel_gvt_clean_device(struct drm_i915_private *i915)
{
struct intel_gvt *gvt = fetch_and_zero(&i915->gvt);
if (drm_WARN_ON(&i915->drm, !gvt))
return;
intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
intel_gvt_cleanup_vgpu_type_groups(gvt);
intel_gvt_clean_vgpu_types(gvt);
intel_gvt_debugfs_clean(gvt);
clean_service_thread(gvt);
intel_gvt_clean_cmd_parser(gvt);
intel_gvt_clean_sched_policy(gvt);
intel_gvt_clean_workload_scheduler(gvt);
intel_gvt_clean_gtt(gvt);
intel_gvt_clean_irq(gvt);
intel_gvt_free_firmware(gvt);
intel_gvt_clean_mmio_info(gvt);
idr_destroy(&gvt->vgpu_idr);
kfree(i915->gvt);
}
/**
* intel_gvt_init_device - initialize a GVT device
* @i915: drm i915 private data
*
* This function is called at the initialization stage, to initialize
* necessary GVT components.
*
* Returns:
* Zero on success, negative error code if failed.
*
*/
int intel_gvt_init_device(struct drm_i915_private *i915)
{
struct intel_gvt *gvt;
struct intel_vgpu *vgpu;
int ret;
if (drm_WARN_ON(&i915->drm, i915->gvt))
return -EEXIST;
gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL);
if (!gvt)
return -ENOMEM;
gvt_dbg_core("init gvt device\n");
idr_init(&gvt->vgpu_idr);
spin_lock_init(&gvt->scheduler.mmio_context_lock);
mutex_init(&gvt->lock);
mutex_init(&gvt->sched_lock);
gvt->gt = &i915->gt;
i915->gvt = gvt;
init_device_info(gvt);
ret = intel_gvt_setup_mmio_info(gvt);
if (ret)
goto out_clean_idr;
intel_gvt_init_engine_mmio_context(gvt);
ret = intel_gvt_load_firmware(gvt);
if (ret)
goto out_clean_mmio_info;
ret = intel_gvt_init_irq(gvt);
if (ret)
goto out_free_firmware;
ret = intel_gvt_init_gtt(gvt);
if (ret)
goto out_clean_irq;
ret = intel_gvt_init_workload_scheduler(gvt);
if (ret)
goto out_clean_gtt;
ret = intel_gvt_init_sched_policy(gvt);
if (ret)
goto out_clean_workload_scheduler;
ret = intel_gvt_init_cmd_parser(gvt);
if (ret)
goto out_clean_sched_policy;
ret = init_service_thread(gvt);
if (ret)
goto out_clean_cmd_parser;
ret = intel_gvt_init_vgpu_types(gvt);
if (ret)
goto out_clean_thread;
ret = intel_gvt_init_vgpu_type_groups(gvt);
if (ret == false) {
gvt_err("failed to init vgpu type groups: %d\n", ret);
goto out_clean_types;
}
vgpu = intel_gvt_create_idle_vgpu(gvt);
if (IS_ERR(vgpu)) {
ret = PTR_ERR(vgpu);
gvt_err("failed to create idle vgpu\n");
goto out_clean_types;
}
gvt->idle_vgpu = vgpu;
intel_gvt_debugfs_init(gvt);
gvt_dbg_core("gvt device initialization is done\n");
intel_gvt_host.dev = &i915->drm.pdev->dev;
intel_gvt_host.initialized = true;
return 0;
out_clean_types:
intel_gvt_clean_vgpu_types(gvt);
out_clean_thread:
clean_service_thread(gvt);
out_clean_cmd_parser:
intel_gvt_clean_cmd_parser(gvt);
out_clean_sched_policy:
intel_gvt_clean_sched_policy(gvt);
out_clean_workload_scheduler:
intel_gvt_clean_workload_scheduler(gvt);
out_clean_gtt:
intel_gvt_clean_gtt(gvt);
out_clean_irq:
intel_gvt_clean_irq(gvt);
out_free_firmware:
intel_gvt_free_firmware(gvt);
out_clean_mmio_info:
intel_gvt_clean_mmio_info(gvt);
out_clean_idr:
idr_destroy(&gvt->vgpu_idr);
kfree(gvt);
i915->gvt = NULL;
return ret;
}
int
intel_gvt_register_hypervisor(struct intel_gvt_mpt *m)
{
int ret;
void *gvt;
if (!intel_gvt_host.initialized)
return -ENODEV;
if (m->type != INTEL_GVT_HYPERVISOR_KVM &&
m->type != INTEL_GVT_HYPERVISOR_XEN)
return -EINVAL;
/* Get a reference for device model module */
if (!try_module_get(THIS_MODULE))
return -ENODEV;
intel_gvt_host.mpt = m;
intel_gvt_host.hypervisor_type = m->type;
gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
&intel_gvt_ops);
if (ret < 0) {
gvt_err("Failed to init %s hypervisor module\n",
supported_hypervisors[intel_gvt_host.hypervisor_type]);
module_put(THIS_MODULE);
return -ENODEV;
}
gvt_dbg_core("Running with hypervisor %s in host mode\n",
supported_hypervisors[intel_gvt_host.hypervisor_type]);
return 0;
}
EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
void
intel_gvt_unregister_hypervisor(void)
{
intel_gvt_hypervisor_host_exit(intel_gvt_host.dev);
module_put(THIS_MODULE);
}
EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);