forked from mirrors/linux
drm/hyperv: Add DRM driver for hyperv synthetic video device
DRM driver for hyperv synthetic video device, based on hyperv_fb framebuffer driver. Also added config option "DRM_HYPERV" to enabled this driver. v2: - Add support for gen2 VM - Fixed review comments v3: - Split into multiple files as suggested by Thomas Zimmermann - Fixed hibernation issue as suggested by Dexuan Cui - Use ioremap_cache as suggested by Dexuan Cui - Incorporated other review comments v4: - Fix bitrotted code - Review comments - Updated the copyright and license to match hyperv_fb v5: - Address review comments and rebased with drm-misc-next v6: - Minor code/comment improvement as suggested by Dexuan Cui Signed-off-by: Deepak Rawat <drawat.floss@gmail.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20210527112230.1274-1-drawat.floss@gmail.com
This commit is contained in:
Deepak Rawat
parent
abb50d67ad
commit
76c56a5aff
7 changed files with 1091 additions and 0 deletions
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@ -379,6 +379,19 @@ source "drivers/gpu/drm/xlnx/Kconfig"
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source "drivers/gpu/drm/gud/Kconfig"
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config DRM_HYPERV
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tristate "DRM Support for Hyper-V synthetic video device"
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depends on DRM && PCI && MMU && HYPERV
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select DRM_KMS_HELPER
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select DRM_GEM_SHMEM_HELPER
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help
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This is a KMS driver for Hyper-V synthetic video device. Choose this
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option if you would like to enable drm driver for Hyper-V virtual
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machine. Unselect Hyper-V framebuffer driver (CONFIG_FB_HYPERV) so
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that DRM driver is used by default.
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If M is selected the module will be called hyperv_drm.
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# Keep legacy drivers last
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menuconfig DRM_LEGACY
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@ -126,3 +126,4 @@ obj-$(CONFIG_DRM_MCDE) += mcde/
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obj-$(CONFIG_DRM_TIDSS) += tidss/
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obj-y += xlnx/
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obj-y += gud/
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obj-$(CONFIG_DRM_HYPERV) += hyperv/
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8
drivers/gpu/drm/hyperv/Makefile
Normal file
8
drivers/gpu/drm/hyperv/Makefile
Normal file
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@ -0,0 +1,8 @@
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# SPDX-License-Identifier: GPL-2.0-only
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hyperv_drm-y := \
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hyperv_drm_drv.o \
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hyperv_drm_modeset.o \
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hyperv_drm_proto.o
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obj-$(CONFIG_DRM_HYPERV) += hyperv_drm.o
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51
drivers/gpu/drm/hyperv/hyperv_drm.h
Normal file
51
drivers/gpu/drm/hyperv/hyperv_drm.h
Normal file
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@ -0,0 +1,51 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2021 Microsoft
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*/
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#ifndef _HYPERV_DRM_H_
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#define _HYPERV_DRM_H_
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#define VMBUS_MAX_PACKET_SIZE 0x4000
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struct hyperv_drm_device {
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/* drm */
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struct drm_device dev;
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struct drm_simple_display_pipe pipe;
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struct drm_connector connector;
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/* mode */
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u32 screen_width_max;
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u32 screen_height_max;
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u32 preferred_width;
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u32 preferred_height;
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u32 screen_depth;
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/* hw */
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struct resource *mem;
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void __iomem *vram;
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unsigned long fb_base;
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unsigned long fb_size;
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struct completion wait;
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u32 synthvid_version;
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u32 mmio_megabytes;
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u8 init_buf[VMBUS_MAX_PACKET_SIZE];
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u8 recv_buf[VMBUS_MAX_PACKET_SIZE];
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struct hv_device *hdev;
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};
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#define to_hv(_dev) container_of(_dev, struct hyperv_drm_device, dev)
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/* hyperv_drm_modeset */
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int hyperv_mode_config_init(struct hyperv_drm_device *hv);
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/* hyperv_drm_proto */
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int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp);
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int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
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u32 w, u32 h, u32 pitch);
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int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect);
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int hyperv_connect_vsp(struct hv_device *hdev);
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#endif
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309
drivers/gpu/drm/hyperv/hyperv_drm_drv.c
Normal file
309
drivers/gpu/drm/hyperv/hyperv_drm_drv.c
Normal file
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@ -0,0 +1,309 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 Microsoft
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*/
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#include <linux/efi.h>
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#include <linux/hyperv.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <drm/drm_aperture.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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#include "hyperv_drm.h"
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#define DRIVER_NAME "hyperv_drm"
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#define DRIVER_DESC "DRM driver for Hyper-V synthetic video device"
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#define DRIVER_DATE "2020"
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#define DRIVER_MAJOR 1
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#define DRIVER_MINOR 0
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#define PCI_VENDOR_ID_MICROSOFT 0x1414
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#define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353
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DEFINE_DRM_GEM_FOPS(hv_fops);
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static struct drm_driver hyperv_driver = {
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.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.fops = &hv_fops,
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DRM_GEM_SHMEM_DRIVER_OPS,
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};
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static int hyperv_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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return 0;
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}
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static void hyperv_pci_remove(struct pci_dev *pdev)
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{
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}
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static const struct pci_device_id hyperv_pci_tbl[] = {
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{
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.vendor = PCI_VENDOR_ID_MICROSOFT,
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.device = PCI_DEVICE_ID_HYPERV_VIDEO,
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},
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{ /* end of list */ }
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};
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/*
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* PCI stub to support gen1 VM.
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*/
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static struct pci_driver hyperv_pci_driver = {
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.name = KBUILD_MODNAME,
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.id_table = hyperv_pci_tbl,
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.probe = hyperv_pci_probe,
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.remove = hyperv_pci_remove,
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};
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static int hyperv_setup_gen1(struct hyperv_drm_device *hv)
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{
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struct drm_device *dev = &hv->dev;
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struct pci_dev *pdev;
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int ret;
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pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT,
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PCI_DEVICE_ID_HYPERV_VIDEO, NULL);
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if (!pdev) {
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drm_err(dev, "Unable to find PCI Hyper-V video\n");
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return -ENODEV;
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}
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ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "hypervdrmfb");
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if (ret) {
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drm_err(dev, "Not able to remove boot fb\n");
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return ret;
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}
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if (pci_request_region(pdev, 0, DRIVER_NAME) != 0)
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drm_warn(dev, "Cannot request framebuffer, boot fb still active?\n");
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if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0) {
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drm_err(dev, "Resource at bar 0 is not IORESOURCE_MEM\n");
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ret = -ENODEV;
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goto error;
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}
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hv->fb_base = pci_resource_start(pdev, 0);
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hv->fb_size = pci_resource_len(pdev, 0);
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if (!hv->fb_base) {
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drm_err(dev, "Resource not available\n");
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ret = -ENODEV;
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goto error;
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}
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hv->fb_size = min(hv->fb_size,
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(unsigned long)(hv->mmio_megabytes * 1024 * 1024));
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hv->vram = devm_ioremap(&pdev->dev, hv->fb_base, hv->fb_size);
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if (!hv->vram) {
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drm_err(dev, "Failed to map vram\n");
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ret = -ENOMEM;
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}
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error:
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pci_dev_put(pdev);
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return ret;
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}
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static int hyperv_setup_gen2(struct hyperv_drm_device *hv,
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struct hv_device *hdev)
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{
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struct drm_device *dev = &hv->dev;
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int ret;
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drm_aperture_remove_conflicting_framebuffers(screen_info.lfb_base,
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screen_info.lfb_size,
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false,
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"hypervdrmfb");
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hv->fb_size = (unsigned long)hv->mmio_megabytes * 1024 * 1024;
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ret = vmbus_allocate_mmio(&hv->mem, hdev, 0, -1, hv->fb_size, 0x100000,
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true);
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if (ret) {
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drm_err(dev, "Failed to allocate mmio\n");
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return -ENOMEM;
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}
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/*
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* Map the VRAM cacheable for performance. This is also required for VM
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* connect to display properly for ARM64 Linux VM, as the host also maps
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* the VRAM cacheable.
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*/
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hv->vram = ioremap_cache(hv->mem->start, hv->fb_size);
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if (!hv->vram) {
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drm_err(dev, "Failed to map vram\n");
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ret = -ENOMEM;
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goto error;
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}
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hv->fb_base = hv->mem->start;
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return 0;
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error:
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vmbus_free_mmio(hv->mem->start, hv->fb_size);
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return ret;
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}
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static int hyperv_vmbus_probe(struct hv_device *hdev,
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const struct hv_vmbus_device_id *dev_id)
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{
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struct hyperv_drm_device *hv;
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struct drm_device *dev;
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int ret;
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hv = devm_drm_dev_alloc(&hdev->device, &hyperv_driver,
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struct hyperv_drm_device, dev);
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if (IS_ERR(hv))
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return PTR_ERR(hv);
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dev = &hv->dev;
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init_completion(&hv->wait);
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hv_set_drvdata(hdev, hv);
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hv->hdev = hdev;
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ret = hyperv_connect_vsp(hdev);
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if (ret) {
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drm_err(dev, "Failed to connect to vmbus.\n");
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goto err_hv_set_drv_data;
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}
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if (efi_enabled(EFI_BOOT))
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ret = hyperv_setup_gen2(hv, hdev);
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else
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ret = hyperv_setup_gen1(hv);
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if (ret)
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goto err_vmbus_close;
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/*
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* Should be done only once during init and resume. Failing to update
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* vram location is not fatal. Device will update dirty area till
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* preferred resolution only.
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*/
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ret = hyperv_update_vram_location(hdev, hv->fb_base);
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if (ret)
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drm_warn(dev, "Failed to update vram location.\n");
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ret = hyperv_mode_config_init(hv);
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if (ret)
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goto err_vmbus_close;
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ret = drm_dev_register(dev, 0);
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if (ret) {
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drm_err(dev, "Failed to register drm driver.\n");
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goto err_vmbus_close;
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}
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drm_fbdev_generic_setup(dev, 0);
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return 0;
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err_vmbus_close:
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vmbus_close(hdev->channel);
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err_hv_set_drv_data:
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hv_set_drvdata(hdev, NULL);
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return ret;
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}
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static int hyperv_vmbus_remove(struct hv_device *hdev)
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{
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struct drm_device *dev = hv_get_drvdata(hdev);
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struct hyperv_drm_device *hv = to_hv(dev);
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drm_dev_unplug(dev);
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drm_atomic_helper_shutdown(dev);
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vmbus_close(hdev->channel);
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hv_set_drvdata(hdev, NULL);
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vmbus_free_mmio(hv->mem->start, hv->fb_size);
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return 0;
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}
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static int hyperv_vmbus_suspend(struct hv_device *hdev)
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{
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struct drm_device *dev = hv_get_drvdata(hdev);
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int ret;
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ret = drm_mode_config_helper_suspend(dev);
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if (ret)
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return ret;
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vmbus_close(hdev->channel);
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return 0;
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}
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static int hyperv_vmbus_resume(struct hv_device *hdev)
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{
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struct drm_device *dev = hv_get_drvdata(hdev);
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struct hyperv_drm_device *hv = to_hv(dev);
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int ret;
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ret = hyperv_connect_vsp(hdev);
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if (ret)
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return ret;
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ret = hyperv_update_vram_location(hdev, hv->fb_base);
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if (ret)
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return ret;
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return drm_mode_config_helper_resume(dev);
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}
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static const struct hv_vmbus_device_id hyperv_vmbus_tbl[] = {
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/* Synthetic Video Device GUID */
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{HV_SYNTHVID_GUID},
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{}
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};
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static struct hv_driver hyperv_hv_driver = {
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.name = KBUILD_MODNAME,
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.id_table = hyperv_vmbus_tbl,
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.probe = hyperv_vmbus_probe,
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.remove = hyperv_vmbus_remove,
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.suspend = hyperv_vmbus_suspend,
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.resume = hyperv_vmbus_resume,
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.driver = {
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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},
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};
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static int __init hyperv_init(void)
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{
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int ret;
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ret = pci_register_driver(&hyperv_pci_driver);
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if (ret != 0)
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return ret;
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return vmbus_driver_register(&hyperv_hv_driver);
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}
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static void __exit hyperv_exit(void)
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{
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vmbus_driver_unregister(&hyperv_hv_driver);
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pci_unregister_driver(&hyperv_pci_driver);
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}
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module_init(hyperv_init);
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module_exit(hyperv_exit);
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MODULE_DEVICE_TABLE(pci, hyperv_pci_tbl);
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MODULE_DEVICE_TABLE(vmbus, hyperv_vmbus_tbl);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Deepak Rawat <drawat.floss@gmail.com>");
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MODULE_DESCRIPTION("DRM driver for Hyper-V synthetic video device");
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231
drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
Normal file
231
drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
Normal file
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@ -0,0 +1,231 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 Microsoft
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*/
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#include <linux/hyperv.h>
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#include <drm/drm_damage_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_format_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_atomic_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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#include "hyperv_drm.h"
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static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
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const struct dma_buf_map *map,
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struct drm_rect *rect)
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{
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struct hyperv_drm_device *hv = to_hv(fb->dev);
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void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */
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int idx;
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if (!drm_dev_enter(&hv->dev, &idx))
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return -ENODEV;
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drm_fb_memcpy_dstclip(hv->vram, fb->pitches[0], vmap, fb, rect);
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drm_dev_exit(idx);
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return 0;
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}
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static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer *fb, const struct dma_buf_map *map)
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{
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struct drm_rect fullscreen = {
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.x1 = 0,
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.x2 = fb->width,
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.y1 = 0,
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.y2 = fb->height,
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};
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return hyperv_blit_to_vram_rect(fb, map, &fullscreen);
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}
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static int hyperv_connector_get_modes(struct drm_connector *connector)
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{
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struct hyperv_drm_device *hv = to_hv(connector->dev);
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int count;
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count = drm_add_modes_noedid(connector,
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connector->dev->mode_config.max_width,
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connector->dev->mode_config.max_height);
|
||||
drm_set_preferred_mode(connector, hv->preferred_width,
|
||||
hv->preferred_height);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static const struct drm_connector_helper_funcs hyperv_connector_helper_funcs = {
|
||||
.get_modes = hyperv_connector_get_modes,
|
||||
};
|
||||
|
||||
static const struct drm_connector_funcs hyperv_connector_funcs = {
|
||||
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||
.destroy = drm_connector_cleanup,
|
||||
.reset = drm_atomic_helper_connector_reset,
|
||||
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
||||
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
||||
};
|
||||
|
||||
static inline int hyperv_conn_init(struct hyperv_drm_device *hv)
|
||||
{
|
||||
drm_connector_helper_add(&hv->connector, &hyperv_connector_helper_funcs);
|
||||
return drm_connector_init(&hv->dev, &hv->connector,
|
||||
&hyperv_connector_funcs,
|
||||
DRM_MODE_CONNECTOR_VIRTUAL);
|
||||
}
|
||||
|
||||
static int hyperv_check_size(struct hyperv_drm_device *hv, int w, int h,
|
||||
struct drm_framebuffer *fb)
|
||||
{
|
||||
u32 pitch = w * (hv->screen_depth / 8);
|
||||
|
||||
if (fb)
|
||||
pitch = fb->pitches[0];
|
||||
|
||||
if (pitch * h > hv->fb_size)
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hyperv_pipe_enable(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_crtc_state *crtc_state,
|
||||
struct drm_plane_state *plane_state)
|
||||
{
|
||||
struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
|
||||
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
|
||||
|
||||
hyperv_update_situation(hv->hdev, 1, hv->screen_depth,
|
||||
crtc_state->mode.hdisplay,
|
||||
crtc_state->mode.vdisplay,
|
||||
plane_state->fb->pitches[0]);
|
||||
hyperv_blit_to_vram_fullscreen(plane_state->fb, &shadow_plane_state->map[0]);
|
||||
}
|
||||
|
||||
static int hyperv_pipe_check(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_plane_state *plane_state,
|
||||
struct drm_crtc_state *crtc_state)
|
||||
{
|
||||
struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
|
||||
struct drm_framebuffer *fb = plane_state->fb;
|
||||
|
||||
if (fb->format->format != DRM_FORMAT_XRGB8888)
|
||||
return -EINVAL;
|
||||
|
||||
if (fb->pitches[0] * fb->height > hv->fb_size)
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hyperv_pipe_update(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_plane_state *old_state)
|
||||
{
|
||||
struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
|
||||
struct drm_plane_state *state = pipe->plane.state;
|
||||
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
|
||||
struct drm_rect rect;
|
||||
|
||||
if (drm_atomic_helper_damage_merged(old_state, state, &rect)) {
|
||||
hyperv_blit_to_vram_rect(state->fb, &shadow_plane_state->map[0], &rect);
|
||||
hyperv_update_dirt(hv->hdev, &rect);
|
||||
}
|
||||
}
|
||||
|
||||
static const struct drm_simple_display_pipe_funcs hyperv_pipe_funcs = {
|
||||
.enable = hyperv_pipe_enable,
|
||||
.check = hyperv_pipe_check,
|
||||
.update = hyperv_pipe_update,
|
||||
DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
|
||||
};
|
||||
|
||||
static const uint32_t hyperv_formats[] = {
|
||||
DRM_FORMAT_XRGB8888,
|
||||
};
|
||||
|
||||
static const uint64_t hyperv_modifiers[] = {
|
||||
DRM_FORMAT_MOD_LINEAR,
|
||||
DRM_FORMAT_MOD_INVALID
|
||||
};
|
||||
|
||||
static inline int hyperv_pipe_init(struct hyperv_drm_device *hv)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = drm_simple_display_pipe_init(&hv->dev,
|
||||
&hv->pipe,
|
||||
&hyperv_pipe_funcs,
|
||||
hyperv_formats,
|
||||
ARRAY_SIZE(hyperv_formats),
|
||||
NULL,
|
||||
&hv->connector);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
drm_plane_enable_fb_damage_clips(&hv->pipe.plane);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static enum drm_mode_status
|
||||
hyperv_mode_valid(struct drm_device *dev,
|
||||
const struct drm_display_mode *mode)
|
||||
{
|
||||
struct hyperv_drm_device *hv = to_hv(dev);
|
||||
|
||||
if (hyperv_check_size(hv, mode->hdisplay, mode->vdisplay, NULL))
|
||||
return MODE_BAD;
|
||||
|
||||
return MODE_OK;
|
||||
}
|
||||
|
||||
static const struct drm_mode_config_funcs hyperv_mode_config_funcs = {
|
||||
.fb_create = drm_gem_fb_create_with_dirty,
|
||||
.mode_valid = hyperv_mode_valid,
|
||||
.atomic_check = drm_atomic_helper_check,
|
||||
.atomic_commit = drm_atomic_helper_commit,
|
||||
};
|
||||
|
||||
int hyperv_mode_config_init(struct hyperv_drm_device *hv)
|
||||
{
|
||||
struct drm_device *dev = &hv->dev;
|
||||
int ret;
|
||||
|
||||
ret = drmm_mode_config_init(dev);
|
||||
if (ret) {
|
||||
drm_err(dev, "Failed to initialized mode setting.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
dev->mode_config.min_width = 0;
|
||||
dev->mode_config.min_height = 0;
|
||||
dev->mode_config.max_width = hv->screen_width_max;
|
||||
dev->mode_config.max_height = hv->screen_height_max;
|
||||
|
||||
dev->mode_config.preferred_depth = hv->screen_depth;
|
||||
dev->mode_config.prefer_shadow = 0;
|
||||
|
||||
dev->mode_config.funcs = &hyperv_mode_config_funcs;
|
||||
|
||||
ret = hyperv_conn_init(hv);
|
||||
if (ret) {
|
||||
drm_err(dev, "Failed to initialized connector.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = hyperv_pipe_init(hv);
|
||||
if (ret) {
|
||||
drm_err(dev, "Failed to initialized pipe.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
drm_mode_config_reset(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
478
drivers/gpu/drm/hyperv/hyperv_drm_proto.c
Normal file
478
drivers/gpu/drm/hyperv/hyperv_drm_proto.c
Normal file
|
|
@ -0,0 +1,478 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright 2021 Microsoft
|
||||
*
|
||||
* Portions of this code is derived from hyperv_fb.c
|
||||
*/
|
||||
|
||||
#include <linux/hyperv.h>
|
||||
|
||||
#include <drm/drm_print.h>
|
||||
#include <drm/drm_simple_kms_helper.h>
|
||||
|
||||
#include "hyperv_drm.h"
|
||||
|
||||
#define VMBUS_RING_BUFSIZE (256 * 1024)
|
||||
#define VMBUS_VSP_TIMEOUT (10 * HZ)
|
||||
|
||||
#define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
|
||||
#define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff)
|
||||
#define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16)
|
||||
#define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)
|
||||
#define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2)
|
||||
#define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5)
|
||||
|
||||
#define SYNTHVID_DEPTH_WIN7 16
|
||||
#define SYNTHVID_DEPTH_WIN8 32
|
||||
#define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
|
||||
#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
|
||||
#define SYNTHVID_WIDTH_MAX_WIN7 1600
|
||||
#define SYNTHVID_HEIGHT_MAX_WIN7 1200
|
||||
|
||||
enum pipe_msg_type {
|
||||
PIPE_MSG_INVALID,
|
||||
PIPE_MSG_DATA,
|
||||
PIPE_MSG_MAX
|
||||
};
|
||||
|
||||
enum synthvid_msg_type {
|
||||
SYNTHVID_ERROR = 0,
|
||||
SYNTHVID_VERSION_REQUEST = 1,
|
||||
SYNTHVID_VERSION_RESPONSE = 2,
|
||||
SYNTHVID_VRAM_LOCATION = 3,
|
||||
SYNTHVID_VRAM_LOCATION_ACK = 4,
|
||||
SYNTHVID_SITUATION_UPDATE = 5,
|
||||
SYNTHVID_SITUATION_UPDATE_ACK = 6,
|
||||
SYNTHVID_POINTER_POSITION = 7,
|
||||
SYNTHVID_POINTER_SHAPE = 8,
|
||||
SYNTHVID_FEATURE_CHANGE = 9,
|
||||
SYNTHVID_DIRT = 10,
|
||||
SYNTHVID_RESOLUTION_REQUEST = 13,
|
||||
SYNTHVID_RESOLUTION_RESPONSE = 14,
|
||||
|
||||
SYNTHVID_MAX = 15
|
||||
};
|
||||
|
||||
struct pipe_msg_hdr {
|
||||
u32 type;
|
||||
u32 size; /* size of message after this field */
|
||||
} __packed;
|
||||
|
||||
struct hvd_screen_info {
|
||||
u16 width;
|
||||
u16 height;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_msg_hdr {
|
||||
u32 type;
|
||||
u32 size; /* size of this header + payload after this field */
|
||||
} __packed;
|
||||
|
||||
struct synthvid_version_req {
|
||||
u32 version;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_version_resp {
|
||||
u32 version;
|
||||
u8 is_accepted;
|
||||
u8 max_video_outputs;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_vram_location {
|
||||
u64 user_ctx;
|
||||
u8 is_vram_gpa_specified;
|
||||
u64 vram_gpa;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_vram_location_ack {
|
||||
u64 user_ctx;
|
||||
} __packed;
|
||||
|
||||
struct video_output_situation {
|
||||
u8 active;
|
||||
u32 vram_offset;
|
||||
u8 depth_bits;
|
||||
u32 width_pixels;
|
||||
u32 height_pixels;
|
||||
u32 pitch_bytes;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_situation_update {
|
||||
u64 user_ctx;
|
||||
u8 video_output_count;
|
||||
struct video_output_situation video_output[1];
|
||||
} __packed;
|
||||
|
||||
struct synthvid_situation_update_ack {
|
||||
u64 user_ctx;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_pointer_position {
|
||||
u8 is_visible;
|
||||
u8 video_output;
|
||||
s32 image_x;
|
||||
s32 image_y;
|
||||
} __packed;
|
||||
|
||||
#define SYNTHVID_CURSOR_MAX_X 96
|
||||
#define SYNTHVID_CURSOR_MAX_Y 96
|
||||
#define SYNTHVID_CURSOR_ARGB_PIXEL_SIZE 4
|
||||
#define SYNTHVID_CURSOR_MAX_SIZE (SYNTHVID_CURSOR_MAX_X * \
|
||||
SYNTHVID_CURSOR_MAX_Y * SYNTHVID_CURSOR_ARGB_PIXEL_SIZE)
|
||||
#define SYNTHVID_CURSOR_COMPLETE (-1)
|
||||
|
||||
struct synthvid_pointer_shape {
|
||||
u8 part_idx;
|
||||
u8 is_argb;
|
||||
u32 width; /* SYNTHVID_CURSOR_MAX_X at most */
|
||||
u32 height; /* SYNTHVID_CURSOR_MAX_Y at most */
|
||||
u32 hot_x; /* hotspot relative to upper-left of pointer image */
|
||||
u32 hot_y;
|
||||
u8 data[4];
|
||||
} __packed;
|
||||
|
||||
struct synthvid_feature_change {
|
||||
u8 is_dirt_needed;
|
||||
u8 is_ptr_pos_needed;
|
||||
u8 is_ptr_shape_needed;
|
||||
u8 is_situ_needed;
|
||||
} __packed;
|
||||
|
||||
struct rect {
|
||||
s32 x1, y1; /* top left corner */
|
||||
s32 x2, y2; /* bottom right corner, exclusive */
|
||||
} __packed;
|
||||
|
||||
struct synthvid_dirt {
|
||||
u8 video_output;
|
||||
u8 dirt_count;
|
||||
struct rect rect[1];
|
||||
} __packed;
|
||||
|
||||
#define SYNTHVID_EDID_BLOCK_SIZE 128
|
||||
#define SYNTHVID_MAX_RESOLUTION_COUNT 64
|
||||
|
||||
struct synthvid_supported_resolution_req {
|
||||
u8 maximum_resolution_count;
|
||||
} __packed;
|
||||
|
||||
struct synthvid_supported_resolution_resp {
|
||||
u8 edid_block[SYNTHVID_EDID_BLOCK_SIZE];
|
||||
u8 resolution_count;
|
||||
u8 default_resolution_index;
|
||||
u8 is_standard;
|
||||
struct hvd_screen_info supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT];
|
||||
} __packed;
|
||||
|
||||
struct synthvid_msg {
|
||||
struct pipe_msg_hdr pipe_hdr;
|
||||
struct synthvid_msg_hdr vid_hdr;
|
||||
union {
|
||||
struct synthvid_version_req ver_req;
|
||||
struct synthvid_version_resp ver_resp;
|
||||
struct synthvid_vram_location vram;
|
||||
struct synthvid_vram_location_ack vram_ack;
|
||||
struct synthvid_situation_update situ;
|
||||
struct synthvid_situation_update_ack situ_ack;
|
||||
struct synthvid_pointer_position ptr_pos;
|
||||
struct synthvid_pointer_shape ptr_shape;
|
||||
struct synthvid_feature_change feature_chg;
|
||||
struct synthvid_dirt dirt;
|
||||
struct synthvid_supported_resolution_req resolution_req;
|
||||
struct synthvid_supported_resolution_resp resolution_resp;
|
||||
};
|
||||
} __packed;
|
||||
|
||||
static inline bool hyperv_version_ge(u32 ver1, u32 ver2)
|
||||
{
|
||||
if (SYNTHVID_VER_GET_MAJOR(ver1) > SYNTHVID_VER_GET_MAJOR(ver2) ||
|
||||
(SYNTHVID_VER_GET_MAJOR(ver1) == SYNTHVID_VER_GET_MAJOR(ver2) &&
|
||||
SYNTHVID_VER_GET_MINOR(ver1) >= SYNTHVID_VER_GET_MINOR(ver2)))
|
||||
return true;
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline int hyperv_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg)
|
||||
{
|
||||
static atomic64_t request_id = ATOMIC64_INIT(0);
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
int ret;
|
||||
|
||||
msg->pipe_hdr.type = PIPE_MSG_DATA;
|
||||
msg->pipe_hdr.size = msg->vid_hdr.size;
|
||||
|
||||
ret = vmbus_sendpacket(hdev->channel, msg,
|
||||
msg->vid_hdr.size + sizeof(struct pipe_msg_hdr),
|
||||
atomic64_inc_return(&request_id),
|
||||
VM_PKT_DATA_INBAND, 0);
|
||||
|
||||
if (ret)
|
||||
drm_err(&hv->dev, "Unable to send packet via vmbus\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int hyperv_negotiate_version(struct hv_device *hdev, u32 ver)
|
||||
{
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
|
||||
struct drm_device *dev = &hv->dev;
|
||||
unsigned long t;
|
||||
|
||||
memset(msg, 0, sizeof(struct synthvid_msg));
|
||||
msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST;
|
||||
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||||
sizeof(struct synthvid_version_req);
|
||||
msg->ver_req.version = ver;
|
||||
hyperv_sendpacket(hdev, msg);
|
||||
|
||||
t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
|
||||
if (!t) {
|
||||
drm_err(dev, "Time out on waiting version response\n");
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
if (!msg->ver_resp.is_accepted) {
|
||||
drm_err(dev, "Version request not accepted\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
hv->synthvid_version = ver;
|
||||
drm_info(dev, "Synthvid Version major %d, minor %d\n",
|
||||
SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp)
|
||||
{
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
|
||||
struct drm_device *dev = &hv->dev;
|
||||
unsigned long t;
|
||||
|
||||
memset(msg, 0, sizeof(struct synthvid_msg));
|
||||
msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION;
|
||||
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||||
sizeof(struct synthvid_vram_location);
|
||||
msg->vram.user_ctx = vram_pp;
|
||||
msg->vram.vram_gpa = vram_pp;
|
||||
msg->vram.is_vram_gpa_specified = 1;
|
||||
hyperv_sendpacket(hdev, msg);
|
||||
|
||||
t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
|
||||
if (!t) {
|
||||
drm_err(dev, "Time out on waiting vram location ack\n");
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
if (msg->vram_ack.user_ctx != vram_pp) {
|
||||
drm_err(dev, "Unable to set VRAM location\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
|
||||
u32 w, u32 h, u32 pitch)
|
||||
{
|
||||
struct synthvid_msg msg;
|
||||
|
||||
memset(&msg, 0, sizeof(struct synthvid_msg));
|
||||
|
||||
msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE;
|
||||
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||||
sizeof(struct synthvid_situation_update);
|
||||
msg.situ.user_ctx = 0;
|
||||
msg.situ.video_output_count = 1;
|
||||
msg.situ.video_output[0].active = active;
|
||||
/* vram_offset should always be 0 */
|
||||
msg.situ.video_output[0].vram_offset = 0;
|
||||
msg.situ.video_output[0].depth_bits = bpp;
|
||||
msg.situ.video_output[0].width_pixels = w;
|
||||
msg.situ.video_output[0].height_pixels = h;
|
||||
msg.situ.video_output[0].pitch_bytes = pitch;
|
||||
|
||||
hyperv_sendpacket(hdev, &msg);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect)
|
||||
{
|
||||
struct synthvid_msg msg;
|
||||
|
||||
memset(&msg, 0, sizeof(struct synthvid_msg));
|
||||
|
||||
msg.vid_hdr.type = SYNTHVID_DIRT;
|
||||
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||||
sizeof(struct synthvid_dirt);
|
||||
msg.dirt.video_output = 0;
|
||||
msg.dirt.dirt_count = 1;
|
||||
msg.dirt.rect[0].x1 = rect->x1;
|
||||
msg.dirt.rect[0].y1 = rect->y1;
|
||||
msg.dirt.rect[0].x2 = rect->x2;
|
||||
msg.dirt.rect[0].y2 = rect->y2;
|
||||
|
||||
hyperv_sendpacket(hdev, &msg);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int hyperv_get_supported_resolution(struct hv_device *hdev)
|
||||
{
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
|
||||
struct drm_device *dev = &hv->dev;
|
||||
unsigned long t;
|
||||
u8 index;
|
||||
int i;
|
||||
|
||||
memset(msg, 0, sizeof(struct synthvid_msg));
|
||||
msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST;
|
||||
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||||
sizeof(struct synthvid_supported_resolution_req);
|
||||
msg->resolution_req.maximum_resolution_count =
|
||||
SYNTHVID_MAX_RESOLUTION_COUNT;
|
||||
hyperv_sendpacket(hdev, msg);
|
||||
|
||||
t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
|
||||
if (!t) {
|
||||
drm_err(dev, "Time out on waiting resolution response\n");
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
if (msg->resolution_resp.resolution_count == 0) {
|
||||
drm_err(dev, "No supported resolutions\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
index = msg->resolution_resp.default_resolution_index;
|
||||
if (index >= msg->resolution_resp.resolution_count) {
|
||||
drm_err(dev, "Invalid resolution index: %d\n", index);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
for (i = 0; i < msg->resolution_resp.resolution_count; i++) {
|
||||
hv->screen_width_max = max_t(u32, hv->screen_width_max,
|
||||
msg->resolution_resp.supported_resolution[i].width);
|
||||
hv->screen_height_max = max_t(u32, hv->screen_height_max,
|
||||
msg->resolution_resp.supported_resolution[i].height);
|
||||
}
|
||||
|
||||
hv->preferred_width =
|
||||
msg->resolution_resp.supported_resolution[index].width;
|
||||
hv->preferred_height =
|
||||
msg->resolution_resp.supported_resolution[index].height;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hyperv_receive_sub(struct hv_device *hdev)
|
||||
{
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct synthvid_msg *msg;
|
||||
|
||||
if (!hv)
|
||||
return;
|
||||
|
||||
msg = (struct synthvid_msg *)hv->recv_buf;
|
||||
|
||||
/* Complete the wait event */
|
||||
if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE ||
|
||||
msg->vid_hdr.type == SYNTHVID_RESOLUTION_RESPONSE ||
|
||||
msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) {
|
||||
memcpy(hv->init_buf, msg, VMBUS_MAX_PACKET_SIZE);
|
||||
complete(&hv->wait);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
static void hyperv_receive(void *ctx)
|
||||
{
|
||||
struct hv_device *hdev = ctx;
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct synthvid_msg *recv_buf;
|
||||
u32 bytes_recvd;
|
||||
u64 req_id;
|
||||
int ret;
|
||||
|
||||
if (!hv)
|
||||
return;
|
||||
|
||||
recv_buf = (struct synthvid_msg *)hv->recv_buf;
|
||||
|
||||
do {
|
||||
ret = vmbus_recvpacket(hdev->channel, recv_buf,
|
||||
VMBUS_MAX_PACKET_SIZE,
|
||||
&bytes_recvd, &req_id);
|
||||
if (bytes_recvd > 0 &&
|
||||
recv_buf->pipe_hdr.type == PIPE_MSG_DATA)
|
||||
hyperv_receive_sub(hdev);
|
||||
} while (bytes_recvd > 0 && ret == 0);
|
||||
}
|
||||
|
||||
int hyperv_connect_vsp(struct hv_device *hdev)
|
||||
{
|
||||
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||||
struct drm_device *dev = &hv->dev;
|
||||
int ret;
|
||||
|
||||
ret = vmbus_open(hdev->channel, VMBUS_RING_BUFSIZE, VMBUS_RING_BUFSIZE,
|
||||
NULL, 0, hyperv_receive, hdev);
|
||||
if (ret) {
|
||||
drm_err(dev, "Unable to open vmbus channel\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Negotiate the protocol version with host */
|
||||
switch (vmbus_proto_version) {
|
||||
case VERSION_WIN10:
|
||||
case VERSION_WIN10_V5:
|
||||
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10);
|
||||
if (!ret)
|
||||
break;
|
||||
fallthrough;
|
||||
case VERSION_WIN8:
|
||||
case VERSION_WIN8_1:
|
||||
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN8);
|
||||
if (!ret)
|
||||
break;
|
||||
fallthrough;
|
||||
case VERSION_WS2008:
|
||||
case VERSION_WIN7:
|
||||
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN7);
|
||||
break;
|
||||
default:
|
||||
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10);
|
||||
break;
|
||||
}
|
||||
|
||||
if (ret) {
|
||||
drm_err(dev, "Synthetic video device version not accepted %d\n", ret);
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (hv->synthvid_version == SYNTHVID_VERSION_WIN7)
|
||||
hv->screen_depth = SYNTHVID_DEPTH_WIN7;
|
||||
else
|
||||
hv->screen_depth = SYNTHVID_DEPTH_WIN8;
|
||||
|
||||
if (hyperv_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) {
|
||||
ret = hyperv_get_supported_resolution(hdev);
|
||||
if (ret)
|
||||
drm_err(dev, "Failed to get supported resolution from host, use default\n");
|
||||
} else {
|
||||
hv->screen_width_max = SYNTHVID_WIDTH_MAX_WIN7;
|
||||
hv->screen_height_max = SYNTHVID_HEIGHT_MAX_WIN7;
|
||||
}
|
||||
|
||||
hv->mmio_megabytes = hdev->channel->offermsg.offer.mmio_megabytes;
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
vmbus_close(hdev->channel);
|
||||
return ret;
|
||||
}
|
||||
Loading…
Reference in a new issue