[PATCH 29/34] drm/i915/gvt: merge gvt.c into kvmgvt.c

Christoph Hellwig
2022-04-11T14:17:19Z

The code in both files is deeply interconnected, so merge it and
keep a bunch of structures and functions static.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/gpu/drm/i915/gvt/Makefile | 1 -
drivers/gpu/drm/i915/gvt/gvt.c | 291 ------------------------------
drivers/gpu/drm/i915/gvt/gvt.h | 6 -
drivers/gpu/drm/i915/gvt/kvmgt.c | 264 ++++++++++++++++++++++++++-
4 files changed, 260 insertions(+), 302 deletions(-)
delete mode 100644 drivers/gpu/drm/i915/gvt/gvt.c

diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile
index cecedd9830f7c..2b08192930c18 100644
--- a/drivers/gpu/drm/i915/gvt/Makefile
+++ b/drivers/gpu/drm/i915/gvt/Makefile
@@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0

kvmgt-y += \
- gvt/gvt.o \
gvt/aperture_gm.o \
gvt/handlers.o \
gvt/vgpu.o \
diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
deleted file mode 100644
index 047fb6c41788b..0000000000000
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ /dev/null
@@ -1,291 +0,0 @@
-/*
- * 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>
-
-static void init_device_info(struct intel_gvt *gvt)
-{
- struct intel_gvt_device_info *info = &gvt->device_info;
- struct pci_dev *pdev = to_pci_dev(gvt->gt->i915->drm.dev);
-
- 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 void intel_gvt_test_and_emulate_vblank(struct intel_gvt *gvt)
-{
- struct intel_vgpu *vgpu;
- int id;
-
- mutex_lock(&gvt->lock);
- idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) {
- if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK + id,
- (void *)&gvt->service_request)) {
- if (vgpu->active)
- intel_vgpu_emulate_vblank(vgpu);
- }
- }
- mutex_unlock(&gvt->lock);
-}
-
-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;
-
- intel_gvt_test_and_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.
- *
- */
-static 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;
-
- mdev_unregister_device(i915->drm.dev);
- intel_gvt_cleanup_vgpu_type_groups(gvt);
- intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
- 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_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.
- *
- */
-static 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_base(&gvt->vgpu_idr, 1);
- spin_lock_init(&gvt->scheduler.mmio_context_lock);
- mutex_init(&gvt->lock);
- mutex_init(&gvt->sched_lock);
- gvt->gt = to_gt(i915);
- 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_free_firmware;
-
- 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;
-
- 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);
-
- ret = intel_gvt_init_vgpu_type_groups(gvt);
- if (ret)
- goto out_destroy_idle_vgpu;
-
- ret = mdev_register_device(i915->drm.dev, &intel_vgpu_mdev_ops);
- if (ret)
- goto out_cleanup_vgpu_type_groups;
-
- gvt_dbg_core("gvt device initialization is done\n");
- return 0;
-
-out_cleanup_vgpu_type_groups:
- intel_gvt_cleanup_vgpu_type_groups(gvt);
-out_destroy_idle_vgpu:
- intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
- intel_gvt_debugfs_clean(gvt);
-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_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;
-}
-
-static void intel_gvt_pm_resume(struct drm_i915_private *i915)
-{
- struct intel_gvt *gvt = i915->gvt;
-
- intel_gvt_restore_fence(gvt);
- intel_gvt_restore_mmio(gvt);
- intel_gvt_restore_ggtt(gvt);
-}
-
-const struct intel_vgpu_ops intel_gvt_vgpu_ops = {
- .init_device = intel_gvt_init_device,
- .clean_device = intel_gvt_clean_device,
- .pm_resume = intel_gvt_pm_resume,
-};
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index c32e8eb199f10..03ecffc2ba56a 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -765,12 +765,6 @@ int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
dma_addr_t dma_addr);

-int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt);
-void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt);
-
#include "trace.h"

-extern const struct intel_vgpu_ops intel_gvt_vgpu_ops;
-extern const struct mdev_parent_ops intel_vgpu_mdev_ops;
-
#endif
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 4113f850bf92d..f033031c676da 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1,7 +1,7 @@
/*
* KVMGT - the implementation of Intel mediated pass-through framework for KVM
*
- * Copyright(c) 2014-2016 Intel Corporation. All rights reserved.
+ * 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"),
@@ -26,6 +26,11 @@
* Kevin Tian <kevin.tian@intel.com>
* Jike Song <jike.song@intel.com>
* Xiaoguang Chen <xiaoguang.chen@intel.com>
+ * Eddie Dong <eddie.dong@intel.com>
+ *
+ * Contributors:
+ * Niu Bing <bing.niu@intel.com>
+ * Zhi Wang <zhi.a.wang@intel.com>
*/

#include <linux/init.h>
@@ -182,7 +187,7 @@ static struct attribute_group *gvt_vgpu_type_groups[] = {
[0 ... NR_MAX_INTEL_VGPU_TYPES - 1] = NULL,
};

-int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
+static int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
{
int i, j;
struct intel_vgpu_type *type;
@@ -211,7 +216,7 @@ int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
return -ENOMEM;
}

-void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
+static void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
{
int i;
struct attribute_group *group;
@@ -1720,7 +1725,7 @@ static struct mdev_driver intel_vgpu_mdev_driver = {
.remove = intel_vgpu_remove,
};

-const struct mdev_parent_ops intel_vgpu_mdev_ops = {
+static const struct mdev_parent_ops intel_vgpu_mdev_ops = {
.owner = THIS_MODULE,
.supported_type_groups = gvt_vgpu_type_groups,
.device_driver = &intel_vgpu_mdev_driver,
@@ -1925,6 +1930,257 @@ void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
mutex_unlock(&vgpu->cache_lock);
}

+static void init_device_info(struct intel_gvt *gvt)
+{
+ struct intel_gvt_device_info *info = &gvt->device_info;
+ struct pci_dev *pdev = to_pci_dev(gvt->gt->i915->drm.dev);
+
+ 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 void intel_gvt_test_and_emulate_vblank(struct intel_gvt *gvt)
+{
+ struct intel_vgpu *vgpu;
+ int id;
+
+ mutex_lock(&gvt->lock);
+ idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) {
+ if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK + id,
+ (void *)&gvt->service_request)) {
+ if (vgpu->active)
+ intel_vgpu_emulate_vblank(vgpu);
+ }
+ }
+ mutex_unlock(&gvt->lock);
+}
+
+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;
+
+ intel_gvt_test_and_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.
+ *
+ */
+static 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;
+
+ mdev_unregister_device(i915->drm.dev);
+ intel_gvt_cleanup_vgpu_type_groups(gvt);
+ intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
+ 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_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.
+ *
+ */
+static 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_base(&gvt->vgpu_idr, 1);
+ spin_lock_init(&gvt->scheduler.mmio_context_lock);
+ mutex_init(&gvt->lock);
+ mutex_init(&gvt->sched_lock);
+ gvt->gt = to_gt(i915);
+ 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_free_firmware;
+
+ 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;
+
+ 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);
+
+ ret = intel_gvt_init_vgpu_type_groups(gvt);
+ if (ret)
+ goto out_destroy_idle_vgpu;
+
+ ret = mdev_register_device(i915->drm.dev, &intel_vgpu_mdev_ops);
+ if (ret)
+ goto out_cleanup_vgpu_type_groups;
+
+ gvt_dbg_core("gvt device initialization is done\n");
+ return 0;
+
+out_cleanup_vgpu_type_groups:
+ intel_gvt_cleanup_vgpu_type_groups(gvt);
+out_destroy_idle_vgpu:
+ intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
+ intel_gvt_debugfs_clean(gvt);
+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_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;
+}
+
+static void intel_gvt_pm_resume(struct drm_i915_private *i915)
+{
+ struct intel_gvt *gvt = i915->gvt;
+
+ intel_gvt_restore_fence(gvt);
+ intel_gvt_restore_mmio(gvt);
+ intel_gvt_restore_ggtt(gvt);
+}
+
+static const struct intel_vgpu_ops intel_gvt_vgpu_ops = {
+ .init_device = intel_gvt_init_device,
+ .clean_device = intel_gvt_clean_device,
+ .pm_resume = intel_gvt_pm_resume,
+};
+
static int __init kvmgt_init(void)
{
int ret;
--
2.30.2