[Intel-gfx] [RFCv2 02/14] drm/i915/gvt: Introduce the basic architecture of GVT-g
Joonas Lahtinen
joonas.lahtinen at linux.intel.com
Tue Feb 23 12:53:33 UTC 2016
A one more note below.
On to, 2016-02-18 at 19:42 +0800, Zhi Wang wrote:
> This patch introduces the very basic framework of GVT-g device model,
> includes basic prototypes, definitions, initialization.
>
> v2:
> - Introduce i915_gvt.c.
> It's necessary to introduce the stubs between i915 driver and GVT-g host,
> as GVT-g components is configurable in kernel config. When disabled, the
> stubs here do nothing.
>
> Take Joonas's comments:
> - Replace boolean return value with int.
> - Replace customized info/warn/debug macros with DRM macros.
> - Document all non-static functions like i915.
> - Remove empty and unused functions.
> - Replace magic number with marcos.
> - Set GVT-g in kernel config to "n" by default.
>
> Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
> ---
> drivers/gpu/drm/i915/Kconfig | 15 ++
> drivers/gpu/drm/i915/Makefile | 2 +
> drivers/gpu/drm/i915/gvt/Makefile | 5 +
> drivers/gpu/drm/i915/gvt/debug.h | 57 +++++
> drivers/gpu/drm/i915/gvt/gvt.c | 393 +++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/gvt/gvt.h | 100 +++++++++
> drivers/gpu/drm/i915/gvt/hypercall.h | 30 +++
> drivers/gpu/drm/i915/gvt/mpt.h | 34 +++
> drivers/gpu/drm/i915/gvt/params.c | 32 +++
> drivers/gpu/drm/i915/gvt/params.h | 34 +++
> drivers/gpu/drm/i915/gvt/reg.h | 34 +++
> drivers/gpu/drm/i915/i915_dma.c | 14 ++
> drivers/gpu/drm/i915/i915_drv.h | 12 ++
> drivers/gpu/drm/i915/i915_gvt.c | 93 +++++++++
> drivers/gpu/drm/i915/i915_gvt.h | 49 +++++
> 15 files changed, 904 insertions(+)
> create mode 100644 drivers/gpu/drm/i915/gvt/Makefile
> create mode 100644 drivers/gpu/drm/i915/gvt/debug.h
> create mode 100644 drivers/gpu/drm/i915/gvt/gvt.c
> create mode 100644 drivers/gpu/drm/i915/gvt/gvt.h
> create mode 100644 drivers/gpu/drm/i915/gvt/hypercall.h
> create mode 100644 drivers/gpu/drm/i915/gvt/mpt.h
> create mode 100644 drivers/gpu/drm/i915/gvt/params.c
> create mode 100644 drivers/gpu/drm/i915/gvt/params.h
> create mode 100644 drivers/gpu/drm/i915/gvt/reg.h
> create mode 100644 drivers/gpu/drm/i915/i915_gvt.c
> create mode 100644 drivers/gpu/drm/i915/i915_gvt.h
>
> diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
> index 4c59793..082e77d 100644
> --- a/drivers/gpu/drm/i915/Kconfig
> +++ b/drivers/gpu/drm/i915/Kconfig
> @@ -45,3 +45,18 @@ config DRM_I915_PRELIMINARY_HW_SUPPORT
> option changes the default for that module option.
>
> If in doubt, say "N".
> +
> +config DRM_I915_GVT
> + tristate "GVT-g host driver"
> + depends on DRM_I915
> + default n
> + help
> + Enabling GVT-g mediated graphics passthrough technique for Intel i915
> + based integrated graphics card. With GVT-g, it's possible to have one
> + integrated i915 device shared by multiple VMs. Performance critical
> + opterations such as apperture accesses and ring buffer operations
> + are pass-throughed to VM, with a minimal set of conflicting resources
> + (e.g. display settings) mediated by vGT driver. The benefit of vGT
> + is on both the performance, given that each VM could directly operate
> + its aperture space and submit commands like running on native, and
> + the feature completeness, given that a true GEN hardware is exposed.
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 0851de07..c65026c 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -91,6 +91,8 @@ i915-y += dvo_ch7017.o \
> intel_sdvo.o \
> intel_tv.o
>
> +obj-$(CONFIG_DRM_I915_GVT) += i915_gvt.o gvt/
> +
> # virtual gpu code
> i915-y += i915_vgpu.o
>
> diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile
> new file mode 100644
> index 0000000..959305f
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/Makefile
> @@ -0,0 +1,5 @@
> +GVT_SOURCE := gvt.o params.o
> +
> +ccflags-y += -I$(src) -I$(src)/.. -Wall -Werror -Wno-unused-function
> +i915_gvt-y := $(GVT_SOURCE)
(This name conflicts with upper level i915_gvt, which I suggested
renaming to intel_gvt.c. A one more reason more so this can be kept as
is).
As the module will be called i915_gvt, I bet the debug prefix should be
changed to reflect that.
So it should look like;
${WHATEVER_DRM_PRINTS} i915-gvt: core: Core debug
${WHATEVER_DRM_PRINTS} i915-gvt: mm: Memory debug
Regards, Joonas
> +obj-$(CONFIG_DRM_I915_GVT) += i915_gvt.o
> diff --git a/drivers/gpu/drm/i915/gvt/debug.h b/drivers/gpu/drm/i915/gvt/debug.h
> new file mode 100644
> index 0000000..0747f28
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/debug.h
> @@ -0,0 +1,57 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef __GVT_DEBUG_H__
> +#define __GVT_DEBUG_H__
> +
> +#define gvt_info(fmt, args...) \
> + DRM_INFO("gvt: "fmt"\n", ##args)
> +
> +#define gvt_err(fmt, args...) \
> + DRM_ERROR("gvt: "fmt"\n", ##args)
> +
> +#define gvt_warn(condition, fmt, args...) \
> + WARN((condition), "gvt: "fmt"\n", ##args)
> +
> +#define gvt_warn_once(condition, fmt, args...) \
> + WARN_ONCE((condition), "gvt: "fmt"\n", ##args)
> +
> +#define gvt_dbg(level, fmt, args...) \
> + DRM_DEBUG_DRIVER("gvt: "fmt"\n", ##args)
> +
> +enum {
> + GVT_DBG_CORE = (1 << 0),
> + GVT_DBG_MM = (1 << 1),
> + GVT_DBG_IRQ = (1 << 2),
> +};
> +
> +#define gvt_dbg_core(fmt, args...) \
> + gvt_dbg(GVT_DBG_CORE, fmt, ##args)
> +
> +#define gvt_dbg_mm(fmt, args...) \
> + gvt_dbg(GVT_DBG_MM, fmt, ##args)
> +
> +#define gvt_dbg_irq(fmt, args...) \
> + gvt_dbg(GVT_DBG_IRQ, fmt, ##args)
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
> new file mode 100644
> index 0000000..52cfa32
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/gvt.c
> @@ -0,0 +1,393 @@
> +/*
> + * 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.
> + */
> +
> +#include
> +#include
> +#include
> +
> +#include "gvt.h"
> +
> +struct gvt_host gvt_host;
> +
> +static const char * const supported_hypervisors[] = {
> + [GVT_HYPERVISOR_TYPE_XEN] = "Xen Hypervisor",
> + [GVT_HYPERVISOR_TYPE_KVM] = "KVM",
> +};
> +
> +static int gvt_init_host(void)
> +{
> + struct gvt_host *host = &gvt_host;
> +
> + if (!gvt.enable) {
> + gvt_dbg_core("GVT-g has been disabled by kernel parameter");
> + return -EINVAL;
> + }
> +
> + if (host->initialized) {
> + gvt_err("GVT-g has already been initialized!");
> + return -EINVAL;
> + }
> +
> + /* Xen DOM U */
> + if (xen_domain() && !xen_initial_domain())
> + return -ENODEV;
> +
> + if (xen_initial_domain()) {
> + /* Xen Dom0 */
> + host->kdm = try_then_request_module(
> + symbol_get(xengt_kdm), "xengt");
> + host->hypervisor_type = GVT_HYPERVISOR_TYPE_XEN;
> + } else {
> + /* not in Xen. Try KVMGT */
> + host->kdm = try_then_request_module(
> + symbol_get(kvmgt_kdm), "kvm");
> + host->hypervisor_type = GVT_HYPERVISOR_TYPE_KVM;
> + }
> +
> + if (!host->kdm)
> + return -EINVAL;
> +
> + if (!hypervisor_detect_host())
> + return -ENODEV;
> +
> + gvt_info("Running with hypervisor %s in host mode",
> + supported_hypervisors[host->hypervisor_type]);
> +
> + idr_init(&host->device_idr);
> + mutex_init(&host->device_idr_lock);
> +
> + host->initialized = true;
> + return 0;
> +}
> +
> +static int init_device_info(struct pgt_device *pdev)
> +{
> + struct gvt_device_info *info = &pdev->device_info;
> +
> + if (!IS_BROADWELL(pdev->dev_priv)) {
> + DRM_DEBUG_DRIVER("Unsupported GEN device");
> + return -ENODEV;
> + }
> +
> + if (IS_BROADWELL(pdev->dev_priv)) {
> + info->max_gtt_gm_sz = (1ULL << 32); /* 4GB */
> + /*
> + * The layout of BAR0 in BDW:
> + * |< - MMIO 2MB ->|<- Reserved 6MB ->|<- MAX GTT 8MB->|
> + *
> + * GTT offset in BAR0 starts from 8MB to 16MB, and
> + * Whatever GTT size is configured in BIOS,
> + * the size of BAR0 is always 16MB. The actual configured
> + * GTT size can be found in GMCH_CTRL.
> + */
> + info->gtt_start_offset = (1UL << 23); /* 8MB */
> + info->max_gtt_size = (1UL << 23); /* 8MB */
> + info->gtt_entry_size = 8;
> + info->gtt_entry_size_shift = 3;
> + info->gmadr_bytes_in_cmd = 8;
> + info->mmio_size = 2 * 1024 * 1024; /* 2MB */
> + }
> +
> + return 0;
> +}
> +
> +static void init_initial_cfg_space_state(struct pgt_device *pdev)
> +{
> + struct pci_dev *pci_dev = pdev->dev_priv->dev->pdev;
> + int i;
> +
> + gvt_dbg_core("init initial cfg space, id %d", pdev->id);
> +
> + for (i = 0; i < GVT_CFG_SPACE_SZ; i += 4)
> + pci_read_config_dword(pci_dev, i,
> + (u32 *)&pdev->initial_cfg_space[i]);
> +
> + for (i = 0; i < GVT_BAR_NUM; i++) {
> + pdev->bar_size[i] = pci_resource_len(pci_dev, i * 2);
> + gvt_dbg_core("bar %d size: %llx", i, pdev->bar_size[i]);
> + }
> +}
> +
> +static void clean_initial_mmio_state(struct pgt_device *pdev)
> +{
> + if (pdev->gttmmio_va) {
> + iounmap(pdev->gttmmio_va);
> + pdev->gttmmio_va = NULL;
> + }
> +
> + if (pdev->gmadr_va) {
> + iounmap(pdev->gmadr_va);
> + pdev->gmadr_va = NULL;
> + }
> +}
> +
> +static int init_initial_mmio_state(struct pgt_device *pdev)
> +{
> + struct gvt_device_info *info = &pdev->device_info;
> +
> + u64 bar0, bar1;
> + int rc;
> +
> + gvt_dbg_core("init initial mmio state, id %d", pdev->id);
> +
> + bar0 = *(u64 *)&pdev->initial_cfg_space[GVT_REG_CFG_SPACE_BAR0];
> + bar1 = *(u64 *)&pdev->initial_cfg_space[GVT_REG_CFG_SPACE_BAR1];
> +
> + pdev->gttmmio_base = bar0 & ~0xf;
> + pdev->reg_num = info->mmio_size / 4;
> + pdev->gmadr_base = bar1 & ~0xf;
> +
> + pdev->gttmmio_va = ioremap(pdev->gttmmio_base, pdev->bar_size[0]);
> + if (!pdev->gttmmio_va) {
> + gvt_err("fail to map GTTMMIO BAR.");
> + return -EFAULT;
> + }
> +
> + pdev->gmadr_va = ioremap(pdev->gmadr_base, pdev->bar_size[2]);
> + if (!pdev->gmadr_va) {
> + gvt_err("fail to map GMADR BAR.");
> + rc = -EFAULT;
> + goto err;
> + }
> +
> + gvt_dbg_core("bar0: 0x%llx, bar1: 0x%llx", bar0, bar1);
> + gvt_dbg_core("mmio size: %x", pdev->mmio_size);
> + gvt_dbg_core("gttmmio: 0x%llx, gmadr: 0x%llx", pdev->gttmmio_base,
> + pdev->gmadr_base);
> + gvt_dbg_core("gttmmio_va: %p", pdev->gttmmio_va);
> + gvt_dbg_core("gmadr_va: %p", pdev->gmadr_va);
> +
> + return 0;
> +err:
> + clean_initial_mmio_state(pdev);
> + return rc;
> +}
> +
> +static int gvt_service_thread(void *data)
> +{
> + struct pgt_device *pdev = (struct pgt_device *)data;
> + int r;
> +
> + gvt_dbg_core("service thread start, pgt %d", pdev->id);
> +
> + while (!kthread_should_stop()) {
> + r = wait_event_interruptible(pdev->service_thread_wq,
> + kthread_should_stop() || pdev->service_request);
> +
> + if (kthread_should_stop())
> + break;
> +
> + if (gvt_warn_once(r,
> + "service thread is waken up by unexpected signal."))
> + continue;
> + }
> +
> + return 0;
> +}
> +
> +static void clean_service_thread(struct pgt_device *pdev)
> +{
> + if (pdev->service_thread) {
> + kthread_stop(pdev->service_thread);
> + pdev->service_thread = NULL;
> + }
> +}
> +
> +static int init_service_thread(struct pgt_device *pdev)
> +{
> + init_waitqueue_head(&pdev->service_thread_wq);
> +
> + pdev->service_thread = kthread_run(gvt_service_thread,
> + pdev, "gvt_service_thread%d", pdev->id);
> +
> + if (!pdev->service_thread) {
> + gvt_err("fail to start service thread.");
> + return -ENOSPC;
> + }
> +
> + return 0;
> +}
> +
> +static void clean_pgt_device(struct pgt_device *pdev)
> +{
> + clean_service_thread(pdev);
> + clean_initial_mmio_state(pdev);
> +}
> +
> +static int init_pgt_device(struct pgt_device *pdev,
> + struct drm_i915_private *dev_priv)
> +{
> + int rc;
> +
> + rc = init_device_info(pdev);
> + if (rc)
> + return rc;
> +
> + init_initial_cfg_space_state(pdev);
> +
> + rc = init_initial_mmio_state(pdev);
> + if (rc)
> + goto err;
> +
> + rc = init_service_thread(pdev);
> + if (rc)
> + goto err;
> +
> + return 0;
> +err:
> + clean_pgt_device(pdev);
> + return rc;
> +}
> +
> +static int post_init_pgt_device(struct pgt_device *pdev)
> +{
> + return 0;
> +}
> +
> +static void free_pgt_device(struct pgt_device *pdev)
> +{
> + struct gvt_host *host = &gvt_host;
> +
> + mutex_lock(&host->device_idr_lock);
> + idr_remove(&host->device_idr, pdev->id);
> + mutex_unlock(&host->device_idr_lock);
> +
> + vfree(pdev);
> +}
> +
> +static struct pgt_device *alloc_pgt_device(struct drm_i915_private *dev_priv)
> +{
> + struct gvt_host *host = &gvt_host;
> + struct pgt_device *pdev = NULL;
> +
> + pdev = vzalloc(sizeof(*pdev));
> + if (!pdev)
> + return NULL;
> +
> + mutex_lock(&host->device_idr_lock);
> + pdev->id = idr_alloc(&host->device_idr, pdev, 0, 0, GFP_KERNEL);
> + mutex_unlock(&host->device_idr_lock);
> +
> + if (pdev->id < 0) {
> + gvt_err("fail to allocate pgt device id.");
> + goto err;
> + }
> +
> + mutex_init(&pdev->lock);
> + pdev->dev_priv = dev_priv;
> + idr_init(&pdev->instance_idr);
> +
> + return pdev;
> +err:
> + free_pgt_device(pdev);
> + return NULL;
> +}
> +
> +void gvt_destroy_pgt_device(void *private_data)
> +{
> + struct pgt_device *pdev = (struct pgt_device *)private_data;
> +
> + clean_pgt_device(pdev);
> + free_pgt_device(pdev);
> +}
> +
> +/**
> + * gvt_create_pgt_device - create a GVT physical device
> + * @dev: drm device
> + *
> + * This function is called at the initialization stage, to create a physical
> + * GVT device and initialize necessary GVT components for it.
> + *
> + * Returns:
> + * pointer to the pgt_device structure, NULL if failed.
> + */
> +void *gvt_create_pgt_device(struct drm_i915_private *dev_priv)
> +{
> + struct pgt_device *pdev = NULL;
> + struct gvt_host *host = &gvt_host;
> + int rc;
> +
> + if (!host->initialized && !gvt_init_host()) {
> + gvt_err("gvt_init_host fail");
> + return NULL;
> + }
> +
> + gvt_dbg_core("create new pgt device, i915 dev_priv: %p", dev_priv);
> +
> + pdev = alloc_pgt_device(dev_priv);
> + if (!pdev) {
> + gvt_err("fail to allocate memory for pgt device.");
> + goto err;
> + }
> +
> + gvt_dbg_core("init pgt device, id %d", pdev->id);
> +
> + rc = init_pgt_device(pdev, dev_priv);
> + if (rc) {
> + gvt_err("fail to init physical device state.");
> + goto err;
> + }
> +
> + gvt_dbg_core("pgt device creation done, id %d", pdev->id);
> +
> + return pdev;
> +err:
> + if (pdev) {
> + gvt_destroy_pgt_device(pdev);
> + pdev = NULL;
> + }
> + return NULL;
> +}
> +
> +/**
> + * gvt_post_init_pgt_device - post init a GVT physical device
> + * @dev: drm device
> + *
> + * This function is called at the end of the initialization stage, to
> + * post-initialize a physical GVT device and initialize necessary
> + * GVT components rely on i915 components.
> + *
> + * Returns:
> + * zero on success, non-zero if failed.
> + */
> +int gvt_post_init_pgt_device(void *private_data)
> +{
> + struct pgt_device *pdev = (struct pgt_device *)private_data;
> + struct gvt_host *host = &gvt_host;
> + int rc;
> +
> + if (!host->initialized) {
> + gvt_err("gvt_host haven't been initialized.");
> + return -ENODEV;
> + }
> +
> + gvt_dbg_core("post init pgt device %d", pdev->id);
> +
> + rc = post_init_pgt_device(pdev);
> + if (rc) {
> + gvt_err("fail to post init physical device state.");
> + return rc;
> + }
> +
> + return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
> new file mode 100644
> index 0000000..d450198
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/gvt.h
> @@ -0,0 +1,100 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _GVT_H_
> +#define _GVT_H_
> +
> +#include "i915_drv.h"
> +#include "i915_vgpu.h"
> +
> +#include "debug.h"
> +#include "params.h"
> +#include "reg.h"
> +#include "hypercall.h"
> +#include "mpt.h"
> +
> +#define GVT_MAX_VGPU 8
> +
> +enum {
> + GVT_HYPERVISOR_TYPE_XEN = 0,
> + GVT_HYPERVISOR_TYPE_KVM,
> +};
> +
> +struct gvt_host {
> + bool initialized;
> + int hypervisor_type;
> + struct mutex device_idr_lock;
> + struct idr device_idr;
> + struct gvt_kernel_dm *kdm;
> +};
> +
> +extern struct gvt_host gvt_host;
> +extern struct gvt_kernel_dm xengt_kdm;
> +extern struct gvt_kernel_dm kvmgt_kdm;
> +
> +/* Describe the limitation of HW.*/
> +struct gvt_device_info {
> + u64 max_gtt_gm_sz;
> + u32 gtt_start_offset;
> + u32 gtt_end_offset;
> + u32 max_gtt_size;
> + u32 gtt_entry_size;
> + u32 gtt_entry_size_shift;
> + u32 gmadr_bytes_in_cmd;
> + u32 mmio_size;
> +};
> +
> +struct vgt_device {
> + int id;
> + int vm_id;
> + struct pgt_device *pdev;
> + bool warn_untrack;
> +};
> +
> +struct pgt_device {
> + struct mutex lock;
> + int id;
> +
> + struct drm_i915_private *dev_priv;
> + struct idr instance_idr;
> +
> + struct gvt_device_info device_info;
> +
> + u8 initial_cfg_space[GVT_CFG_SPACE_SZ];
> + u64 bar_size[GVT_BAR_NUM];
> +
> + u64 gttmmio_base;
> + void *gttmmio_va;
> +
> + u64 gmadr_base;
> + void *gmadr_va;
> +
> + u32 mmio_size;
> + u32 reg_num;
> +
> + wait_queue_head_t service_thread_wq;
> + struct task_struct *service_thread;
> + unsigned long service_request;
> +};
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
> new file mode 100644
> index 0000000..0a41874
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/hypercall.h
> @@ -0,0 +1,30 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _GVT_HYPERCALL_H_
> +#define _GVT_HYPERCALL_H_
> +
> +struct gvt_kernel_dm {
> +};
> +
> +#endif /* _GVT_HYPERCALL_H_ */
> diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
> new file mode 100644
> index 0000000..e594bb8
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/mpt.h
> @@ -0,0 +1,34 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _GVT_MPT_H_
> +#define _GVT_MPT_H_
> +
> +struct vgt_device;
> +
> +static inline bool hypervisor_detect_host(void)
> +{
> + return false;
> +}
> +
> +#endif /* _GVT_MPT_H_ */
> diff --git a/drivers/gpu/drm/i915/gvt/params.c b/drivers/gpu/drm/i915/gvt/params.c
> new file mode 100644
> index 0000000..d381d17
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/params.c
> @@ -0,0 +1,32 @@
> +/*
> + * 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.
> + */
> +
> +#include "gvt.h"
> +
> +struct gvt_kernel_params gvt = {
> + .enable = false,
> + .debug = 0,
> +};
> +
> +module_param_named(gvt_enable, gvt.enable, bool, 0600);
> +MODULE_PARM_DESC(gvt_enable, "Enable Intel GVT-g host support");
> diff --git a/drivers/gpu/drm/i915/gvt/params.h b/drivers/gpu/drm/i915/gvt/params.h
> new file mode 100644
> index 0000000..d2955b9
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/params.h
> @@ -0,0 +1,34 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _GVT_PARAMS_H_
> +#define _GVT_PARAMS_H_
> +
> +struct gvt_kernel_params {
> + bool enable;
> + int debug;
> +};
> +
> +extern struct gvt_kernel_params gvt;
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/gvt/reg.h b/drivers/gpu/drm/i915/gvt/reg.h
> new file mode 100644
> index 0000000..d363b74
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gvt/reg.h
> @@ -0,0 +1,34 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _GVT_REG_H
> +#define _GVT_REG_H
> +
> +#define GVT_CFG_SPACE_SZ 256
> +#define GVT_BAR_NUM 4
> +
> +#define GVT_REG_CFG_SPACE_BAR0 0x10
> +#define GVT_REG_CFG_SPACE_BAR1 0x18
> +#define GVT_REG_CFG_SPACE_BAR2 0x20
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 1c6d227..f3bed37 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -35,6 +35,7 @@
> #include "intel_drv.h"
> #include
> #include "i915_drv.h"
> +#include "i915_gvt.h"
> #include "i915_vgpu.h"
> #include "i915_trace.h"
> #include
> @@ -1045,6 +1046,10 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
>
> intel_uncore_init(dev);
>
> + ret = intel_gvt_init(dev);
> + if (ret)
> + goto out_uncore_fini;
> +
> ret = i915_gem_gtt_init(dev);
> if (ret)
> goto out_uncore_fini;
> @@ -1135,6 +1140,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
> goto out_power_well;
> }
>
> + ret = intel_gvt_post_init(dev);
> + if (ret) {
> + DRM_ERROR("failed to post init pgt device\n");
> + goto out_power_well;
> + }
> +
> /*
> * Notify a valid surface after modesetting,
> * when running inside a VM.
> @@ -1177,6 +1188,7 @@ out_gem_unload:
> out_gtt:
> i915_global_gtt_cleanup(dev);
> out_uncore_fini:
> + intel_gvt_cleanup(dev);
> intel_uncore_fini(dev);
> i915_mmio_cleanup(dev);
> put_bridge:
> @@ -1223,6 +1235,8 @@ int i915_driver_unload(struct drm_device *dev)
>
> intel_modeset_cleanup(dev);
>
> + intel_gvt_cleanup(dev);
> +
> /*
> * free the memory space allocated for the child device
> * config parsed from VBT
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 20d9dbd..2f897c3 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1705,6 +1705,10 @@ struct i915_workarounds {
> u32 hw_whitelist_count[I915_NUM_RINGS];
> };
>
> +struct i915_gvt {
> + void *pgt_device;
> +};
> +
> struct i915_virtual_gpu {
> bool active;
> };
> @@ -1744,6 +1748,8 @@ struct drm_i915_private {
>
> struct i915_virtual_gpu vgpu;
>
> + struct i915_gvt gvt;
> +
> struct intel_guc guc;
>
> struct intel_csr csr;
> @@ -2780,6 +2786,12 @@ void intel_uncore_forcewake_get__locked(struct drm_i915_private *dev_priv,
> void intel_uncore_forcewake_put__locked(struct drm_i915_private *dev_priv,
> enum forcewake_domains domains);
> void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);
> +
> +static inline bool intel_gvt_active(struct drm_device *dev)
> +{
> + return to_i915(dev)->gvt.pgt_device ? true : false;
> +}
> +
> static inline bool intel_vgpu_active(struct drm_device *dev)
> {
> return to_i915(dev)->vgpu.active;
> diff --git a/drivers/gpu/drm/i915/i915_gvt.c b/drivers/gpu/drm/i915/i915_gvt.c
> new file mode 100644
> index 0000000..3ca7232
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/i915_gvt.c
> @@ -0,0 +1,93 @@
> +/*
> + * 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.
> + */
> +
> +#include "i915_drv.h"
> +#include "i915_gvt.h"
> +
> +/**
> + * DOC: Intel GVT-g host support
> + *
> + * Intel GVT-g is a graphics virtualization technology which shares the
> + * GPU among multiple virtual machines on a time-sharing basis. Each
> + * virtual machine is presented a virtual GPU (vGPU), which has equivalent
> + * features as the underlying physical GPU (pGPU), so i915 driver can run
> + * seamlessly in a virtual machine. This file provides the englightments
> + * of GVT and the necessary components used by GVT in i915 driver.
> + */
> +
> +/**
> + * intel_gvt_init - initialize GVT components at the beginning of i915
> + * driver loading.
> + * @dev: drm device *
> + *
> + * This function is called at the beginning of the initialization stage,
> + * to initialize the GVT components that have to be initialized
> + * before HW gets touched by other i915 components.
> + */
> +int intel_gvt_init(struct drm_device *dev)
> +{
> + struct drm_i915_private *dev_priv = to_i915(dev);
> +
> + dev_priv->gvt.pgt_device = gvt_create_pgt_device(dev_priv);
> + if (intel_gvt_active(dev))
> + DRM_DEBUG_DRIVER("GVT-g is running in host mode\n");
> +
> + return 0;
> +}
> +
> +/**
> + * intel_gvt_post_init - initialize GVT components at the end of i915
> + * driver loading.
> + * @dev: drm device *
> + *
> + * This function is called at the end of the initialization stage,
> + * to initialize the GVT components that have to be initialized after
> + * other i915 components are ready.
> + */
> +int intel_gvt_post_init(struct drm_device *dev)
> +{
> + struct drm_i915_private *dev_priv = to_i915(dev);
> +
> + if (!intel_gvt_active(dev))
> + return 0;
> +
> + return gvt_post_init_pgt_device(dev_priv->gvt.pgt_device);
> +}
> +
> +/**
> + * intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading
> + * @dev: drm device *
> + *
> + * This function is called at the i915 driver unloading stage, to shutdown
> + * GVT components and release the related resources.
> + */
> +void intel_gvt_cleanup(struct drm_device *dev)
> +{
> + struct drm_i915_private *dev_priv = to_i915(dev);
> +
> + if (!intel_gvt_active(dev))
> + return;
> +
> + gvt_destroy_pgt_device(dev_priv->gvt.pgt_device);
> + dev_priv->gvt.pgt_device = NULL;
> +}
> diff --git a/drivers/gpu/drm/i915/i915_gvt.h b/drivers/gpu/drm/i915/i915_gvt.h
> new file mode 100644
> index 0000000..30cc207
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/i915_gvt.h
> @@ -0,0 +1,49 @@
> +/*
> + * 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.
> + */
> +
> +#ifndef _I915_GVT_H_
> +#define _I915_GVT_H_
> +
> +#ifdef CONFIG_DRM_I915_GVT
> +extern void *gvt_create_pgt_device(struct drm_i915_private *dev_priv);
> +extern int gvt_post_init_pgt_device(void *data);
> +extern void gvt_destroy_pgt_device(void *data);
> +
> +extern int intel_gvt_init(struct drm_device *dev);
> +extern int intel_gvt_post_init(struct drm_device *dev);
> +extern void intel_gvt_cleanup(struct drm_device *dev);
> +#else
> +extern int intel_gvt_init(struct drm_device *dev)
> +{
> + return 0;
> +}
> +extern int intel_gvt_post_init(struct drm_device *dev)
> +{
> + return 0;
> +}
> +extern void intel_gvt_cleanup(struct drm_device *dev)
> +{
> +}
> +#endif
> +
> +#endif /* _I915_GVT_H_ */
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
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