![Linus Torvalds](/assets/img/avatar_default.png)
support by Dexuan Cui. - Fix for a warning shown when host sends non-aligned balloon requests by Tianyu Lan. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE4n5dijQDou9mhzu83qZv95d3LNwFAl43g98ACgkQ3qZv95d3 LNzKrw/+LrlCrzsmFuH/0drGn+Y6UpaOUMY5SMFZVmkjWRg9CmEugO6vUn1KEEIX lx2JkamXmF6HMZ+xoy8b1QrZAO7ueBq7Nqe4UQuWPfA2MoAjQbFpCl/SP9r8cNYu 3qBTP2zfay1qt0LyAC5LH/uXnm2e++LTFG/mnA0GYlt9e750LlgsjcsZrsNUBo0l yO56219/IBOIEI1LQLAN1q3rwFHnUWYbSY5HVSZBOwjDtTHwK64G45nKFNSnIC1h sFg6czDIPcYBGPzvSHcC4HJsRCddaqcBdt2O1mlXo0UJJXkhmdXx6o4W5DCP9BSD FzJIzU5NjGuPnUrQUBW04aH7IoIZLXOMhyZoX14BDswwNNPkAuWAmsDzwTP8irHH EvaH51c9RO34EkPF+2CgcT57+58KDL1NDOtak2gkOisBtw4SJgozz3vt2r5lZ/2b 4vhho0i7tZcQvMsEwR0ltMsRabMJpO07dgc3OZv2m3s75AKvPI8wtqxUS9N0smu4 dQ+wAYgjfiuvOJ1oLbOOiFWDGAuxNkttilN3h5ZYYJfZ1FamkwATa3xkmmV8MgEh lWj1MbOssEedUBG3asChJ+pjfdI19Pk9H5YNT0TIgSMUt5YFF6ZpP3RQURlDxhmG BxQyft0dua6Ra5MSl11gl4p90PJC5lbknwTToFD3hSPdzcYIr8U= =3tZ1 -----END PGP SIGNATURE----- Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull Hyper-V updates from Sasha Levin: - Most of the commits here are work to enable host-initiated hibernation support by Dexuan Cui. - Fix for a warning shown when host sends non-aligned balloon requests by Tianyu Lan. * tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: hv_utils: Add the support of hibernation hv_utils: Support host-initiated hibernation request hv_utils: Support host-initiated restart request Tools: hv: Reopen the devices if read() or write() returns errors video: hyperv: hyperv_fb: Use physical memory for fb on HyperV Gen 1 VMs. Drivers: hv: vmbus: Ignore CHANNELMSG_TL_CONNECT_RESULT(23) video: hyperv_fb: Fix hibernation for the deferred IO feature Input: hyperv-keyboard: Add the support of hibernation hv_balloon: Balloon up according to request page number
1425 lines
35 KiB
C
1425 lines
35 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2012, Microsoft Corporation.
|
|
*
|
|
* Author:
|
|
* Haiyang Zhang <haiyangz@microsoft.com>
|
|
*/
|
|
|
|
/*
|
|
* Hyper-V Synthetic Video Frame Buffer Driver
|
|
*
|
|
* This is the driver for the Hyper-V Synthetic Video, which supports
|
|
* screen resolution up to Full HD 1920x1080 with 32 bit color on Windows
|
|
* Server 2012, and 1600x1200 with 16 bit color on Windows Server 2008 R2
|
|
* or earlier.
|
|
*
|
|
* It also solves the double mouse cursor issue of the emulated video mode.
|
|
*
|
|
* The default screen resolution is 1152x864, which may be changed by a
|
|
* kernel parameter:
|
|
* video=hyperv_fb:<width>x<height>
|
|
* For example: video=hyperv_fb:1280x1024
|
|
*
|
|
* Portrait orientation is also supported:
|
|
* For example: video=hyperv_fb:864x1152
|
|
*
|
|
* When a Windows 10 RS5+ host is used, the virtual machine screen
|
|
* resolution is obtained from the host. The "video=hyperv_fb" option is
|
|
* not needed, but still can be used to overwrite what the host specifies.
|
|
* The VM resolution on the host could be set by executing the powershell
|
|
* "set-vmvideo" command. For example
|
|
* set-vmvideo -vmname name -horizontalresolution:1920 \
|
|
* -verticalresolution:1200 -resolutiontype single
|
|
*
|
|
* Gen 1 VMs also support direct using VM's physical memory for framebuffer.
|
|
* It could improve the efficiency and performance for framebuffer and VM.
|
|
* This requires to allocate contiguous physical memory from Linux kernel's
|
|
* CMA memory allocator. To enable this, supply a kernel parameter to give
|
|
* enough memory space to CMA allocator for framebuffer. For example:
|
|
* cma=130m
|
|
* This gives 130MB memory to CMA allocator that can be allocated to
|
|
* framebuffer. For reference, 8K resolution (7680x4320) takes about
|
|
* 127MB memory.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/efi.h>
|
|
#include <linux/console.h>
|
|
|
|
#include <linux/hyperv.h>
|
|
|
|
|
|
/* Hyper-V Synthetic Video Protocol definitions and structures */
|
|
#define MAX_VMBUS_PKT_SIZE 0x4000
|
|
|
|
#define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
|
|
#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_VER_GET_MAJOR(ver) (ver & 0x0000ffff)
|
|
#define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16)
|
|
|
|
#define SYNTHVID_DEPTH_WIN7 16
|
|
#define SYNTHVID_DEPTH_WIN8 32
|
|
|
|
#define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
|
|
#define SYNTHVID_WIDTH_MAX_WIN7 1600
|
|
#define SYNTHVID_HEIGHT_MAX_WIN7 1200
|
|
|
|
#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
|
|
|
|
#define PCI_VENDOR_ID_MICROSOFT 0x1414
|
|
#define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353
|
|
|
|
|
|
enum pipe_msg_type {
|
|
PIPE_MSG_INVALID,
|
|
PIPE_MSG_DATA,
|
|
PIPE_MSG_MAX
|
|
};
|
|
|
|
struct pipe_msg_hdr {
|
|
u32 type;
|
|
u32 size; /* size of message after this field */
|
|
} __packed;
|
|
|
|
|
|
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
|
|
};
|
|
|
|
#define SYNTHVID_EDID_BLOCK_SIZE 128
|
|
#define SYNTHVID_MAX_RESOLUTION_COUNT 64
|
|
|
|
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_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_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 CURSOR_MAX_X 96
|
|
#define CURSOR_MAX_Y 96
|
|
#define CURSOR_ARGB_PIXEL_SIZE 4
|
|
#define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE)
|
|
#define CURSOR_COMPLETE (-1)
|
|
|
|
struct synthvid_pointer_shape {
|
|
u8 part_idx;
|
|
u8 is_argb;
|
|
u32 width; /* CURSOR_MAX_X at most */
|
|
u32 height; /* 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;
|
|
|
|
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;
|
|
|
|
|
|
/* FB driver definitions and structures */
|
|
#define HVFB_WIDTH 1152 /* default screen width */
|
|
#define HVFB_HEIGHT 864 /* default screen height */
|
|
#define HVFB_WIDTH_MIN 640
|
|
#define HVFB_HEIGHT_MIN 480
|
|
|
|
#define RING_BUFSIZE (256 * 1024)
|
|
#define VSP_TIMEOUT (10 * HZ)
|
|
#define HVFB_UPDATE_DELAY (HZ / 20)
|
|
#define HVFB_ONDEMAND_THROTTLE (HZ / 20)
|
|
|
|
struct hvfb_par {
|
|
struct fb_info *info;
|
|
struct resource *mem;
|
|
bool fb_ready; /* fb device is ready */
|
|
struct completion wait;
|
|
u32 synthvid_version;
|
|
|
|
struct delayed_work dwork;
|
|
bool update;
|
|
bool update_saved; /* The value of 'update' before hibernation */
|
|
|
|
u32 pseudo_palette[16];
|
|
u8 init_buf[MAX_VMBUS_PKT_SIZE];
|
|
u8 recv_buf[MAX_VMBUS_PKT_SIZE];
|
|
|
|
/* If true, the VSC notifies the VSP on every framebuffer change */
|
|
bool synchronous_fb;
|
|
|
|
/* If true, need to copy from deferred IO mem to framebuffer mem */
|
|
bool need_docopy;
|
|
|
|
struct notifier_block hvfb_panic_nb;
|
|
|
|
/* Memory for deferred IO and frame buffer itself */
|
|
unsigned char *dio_vp;
|
|
unsigned char *mmio_vp;
|
|
phys_addr_t mmio_pp;
|
|
|
|
/* Dirty rectangle, protected by delayed_refresh_lock */
|
|
int x1, y1, x2, y2;
|
|
bool delayed_refresh;
|
|
spinlock_t delayed_refresh_lock;
|
|
};
|
|
|
|
static uint screen_width = HVFB_WIDTH;
|
|
static uint screen_height = HVFB_HEIGHT;
|
|
static uint screen_width_max = HVFB_WIDTH;
|
|
static uint screen_height_max = HVFB_HEIGHT;
|
|
static uint screen_depth;
|
|
static uint screen_fb_size;
|
|
static uint dio_fb_size; /* FB size for deferred IO */
|
|
|
|
/* Send message to Hyper-V host */
|
|
static inline int synthvid_send(struct hv_device *hdev,
|
|
struct synthvid_msg *msg)
|
|
{
|
|
static atomic64_t request_id = ATOMIC64_INIT(0);
|
|
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)
|
|
pr_err("Unable to send packet via vmbus\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Send screen resolution info to host */
|
|
static int synthvid_send_situ(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct synthvid_msg msg;
|
|
|
|
if (!info)
|
|
return -ENODEV;
|
|
|
|
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 = 1;
|
|
msg.situ.video_output[0].vram_offset = 0;
|
|
msg.situ.video_output[0].depth_bits = info->var.bits_per_pixel;
|
|
msg.situ.video_output[0].width_pixels = info->var.xres;
|
|
msg.situ.video_output[0].height_pixels = info->var.yres;
|
|
msg.situ.video_output[0].pitch_bytes = info->fix.line_length;
|
|
|
|
synthvid_send(hdev, &msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Send mouse pointer info to host */
|
|
static int synthvid_send_ptr(struct hv_device *hdev)
|
|
{
|
|
struct synthvid_msg msg;
|
|
|
|
memset(&msg, 0, sizeof(struct synthvid_msg));
|
|
msg.vid_hdr.type = SYNTHVID_POINTER_POSITION;
|
|
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
|
sizeof(struct synthvid_pointer_position);
|
|
msg.ptr_pos.is_visible = 1;
|
|
msg.ptr_pos.video_output = 0;
|
|
msg.ptr_pos.image_x = 0;
|
|
msg.ptr_pos.image_y = 0;
|
|
synthvid_send(hdev, &msg);
|
|
|
|
memset(&msg, 0, sizeof(struct synthvid_msg));
|
|
msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE;
|
|
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
|
sizeof(struct synthvid_pointer_shape);
|
|
msg.ptr_shape.part_idx = CURSOR_COMPLETE;
|
|
msg.ptr_shape.is_argb = 1;
|
|
msg.ptr_shape.width = 1;
|
|
msg.ptr_shape.height = 1;
|
|
msg.ptr_shape.hot_x = 0;
|
|
msg.ptr_shape.hot_y = 0;
|
|
msg.ptr_shape.data[0] = 0;
|
|
msg.ptr_shape.data[1] = 1;
|
|
msg.ptr_shape.data[2] = 1;
|
|
msg.ptr_shape.data[3] = 1;
|
|
synthvid_send(hdev, &msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Send updated screen area (dirty rectangle) location to host */
|
|
static int
|
|
synthvid_update(struct fb_info *info, int x1, int y1, int x2, int y2)
|
|
{
|
|
struct hv_device *hdev = device_to_hv_device(info->device);
|
|
struct synthvid_msg msg;
|
|
|
|
memset(&msg, 0, sizeof(struct synthvid_msg));
|
|
if (x2 == INT_MAX)
|
|
x2 = info->var.xres;
|
|
if (y2 == INT_MAX)
|
|
y2 = info->var.yres;
|
|
|
|
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 = (x1 > x2) ? 0 : x1;
|
|
msg.dirt.rect[0].y1 = (y1 > y2) ? 0 : y1;
|
|
msg.dirt.rect[0].x2 =
|
|
(x2 < x1 || x2 > info->var.xres) ? info->var.xres : x2;
|
|
msg.dirt.rect[0].y2 =
|
|
(y2 < y1 || y2 > info->var.yres) ? info->var.yres : y2;
|
|
|
|
synthvid_send(hdev, &msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hvfb_docopy(struct hvfb_par *par,
|
|
unsigned long offset,
|
|
unsigned long size)
|
|
{
|
|
if (!par || !par->mmio_vp || !par->dio_vp || !par->fb_ready ||
|
|
size == 0 || offset >= dio_fb_size)
|
|
return;
|
|
|
|
if (offset + size > dio_fb_size)
|
|
size = dio_fb_size - offset;
|
|
|
|
memcpy(par->mmio_vp + offset, par->dio_vp + offset, size);
|
|
}
|
|
|
|
/* Deferred IO callback */
|
|
static void synthvid_deferred_io(struct fb_info *p,
|
|
struct list_head *pagelist)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
struct page *page;
|
|
unsigned long start, end;
|
|
int y1, y2, miny, maxy;
|
|
|
|
miny = INT_MAX;
|
|
maxy = 0;
|
|
|
|
/*
|
|
* Merge dirty pages. It is possible that last page cross
|
|
* over the end of frame buffer row yres. This is taken care of
|
|
* in synthvid_update function by clamping the y2
|
|
* value to yres.
|
|
*/
|
|
list_for_each_entry(page, pagelist, lru) {
|
|
start = page->index << PAGE_SHIFT;
|
|
end = start + PAGE_SIZE - 1;
|
|
y1 = start / p->fix.line_length;
|
|
y2 = end / p->fix.line_length;
|
|
miny = min_t(int, miny, y1);
|
|
maxy = max_t(int, maxy, y2);
|
|
|
|
/* Copy from dio space to mmio address */
|
|
if (par->fb_ready && par->need_docopy)
|
|
hvfb_docopy(par, start, PAGE_SIZE);
|
|
}
|
|
|
|
if (par->fb_ready && par->update)
|
|
synthvid_update(p, 0, miny, p->var.xres, maxy + 1);
|
|
}
|
|
|
|
static struct fb_deferred_io synthvid_defio = {
|
|
.delay = HZ / 20,
|
|
.deferred_io = synthvid_deferred_io,
|
|
};
|
|
|
|
/*
|
|
* Actions on received messages from host:
|
|
* Complete the wait event.
|
|
* Or, reply with screen and cursor info.
|
|
*/
|
|
static void synthvid_recv_sub(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par;
|
|
struct synthvid_msg *msg;
|
|
|
|
if (!info)
|
|
return;
|
|
|
|
par = info->par;
|
|
msg = (struct synthvid_msg *)par->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(par->init_buf, msg, MAX_VMBUS_PKT_SIZE);
|
|
complete(&par->wait);
|
|
return;
|
|
}
|
|
|
|
/* Reply with screen and cursor info */
|
|
if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) {
|
|
if (par->fb_ready) {
|
|
synthvid_send_ptr(hdev);
|
|
synthvid_send_situ(hdev);
|
|
}
|
|
|
|
par->update = msg->feature_chg.is_dirt_needed;
|
|
if (par->update)
|
|
schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY);
|
|
}
|
|
}
|
|
|
|
/* Receive callback for messages from the host */
|
|
static void synthvid_receive(void *ctx)
|
|
{
|
|
struct hv_device *hdev = ctx;
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par;
|
|
struct synthvid_msg *recv_buf;
|
|
u32 bytes_recvd;
|
|
u64 req_id;
|
|
int ret;
|
|
|
|
if (!info)
|
|
return;
|
|
|
|
par = info->par;
|
|
recv_buf = (struct synthvid_msg *)par->recv_buf;
|
|
|
|
do {
|
|
ret = vmbus_recvpacket(hdev->channel, recv_buf,
|
|
MAX_VMBUS_PKT_SIZE,
|
|
&bytes_recvd, &req_id);
|
|
if (bytes_recvd > 0 &&
|
|
recv_buf->pipe_hdr.type == PIPE_MSG_DATA)
|
|
synthvid_recv_sub(hdev);
|
|
} while (bytes_recvd > 0 && ret == 0);
|
|
}
|
|
|
|
/* Check if the ver1 version is equal or greater than ver2 */
|
|
static inline bool synthvid_ver_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;
|
|
}
|
|
|
|
/* Check synthetic video protocol version with the host */
|
|
static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf;
|
|
int ret = 0;
|
|
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;
|
|
synthvid_send(hdev, msg);
|
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT);
|
|
if (!t) {
|
|
pr_err("Time out on waiting version response\n");
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
if (!msg->ver_resp.is_accepted) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
par->synthvid_version = ver;
|
|
pr_info("Synthvid Version major %d, minor %d\n",
|
|
SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver));
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* Get current resolution from the host */
|
|
static int synthvid_get_supported_resolution(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf;
|
|
int ret = 0;
|
|
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;
|
|
synthvid_send(hdev, msg);
|
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT);
|
|
if (!t) {
|
|
pr_err("Time out on waiting resolution response\n");
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
if (msg->resolution_resp.resolution_count == 0) {
|
|
pr_err("No supported resolutions\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
index = msg->resolution_resp.default_resolution_index;
|
|
if (index >= msg->resolution_resp.resolution_count) {
|
|
pr_err("Invalid resolution index: %d\n", index);
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < msg->resolution_resp.resolution_count; i++) {
|
|
screen_width_max = max_t(unsigned int, screen_width_max,
|
|
msg->resolution_resp.supported_resolution[i].width);
|
|
screen_height_max = max_t(unsigned int, screen_height_max,
|
|
msg->resolution_resp.supported_resolution[i].height);
|
|
}
|
|
|
|
screen_width =
|
|
msg->resolution_resp.supported_resolution[index].width;
|
|
screen_height =
|
|
msg->resolution_resp.supported_resolution[index].height;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* Connect to VSP (Virtual Service Provider) on host */
|
|
static int synthvid_connect_vsp(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
int ret;
|
|
|
|
ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE,
|
|
NULL, 0, synthvid_receive, hdev);
|
|
if (ret) {
|
|
pr_err("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 = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN10);
|
|
if (!ret)
|
|
break;
|
|
/* Fallthrough */
|
|
case VERSION_WIN8:
|
|
case VERSION_WIN8_1:
|
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8);
|
|
if (!ret)
|
|
break;
|
|
/* Fallthrough */
|
|
case VERSION_WS2008:
|
|
case VERSION_WIN7:
|
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7);
|
|
break;
|
|
default:
|
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN10);
|
|
break;
|
|
}
|
|
|
|
if (ret) {
|
|
pr_err("Synthetic video device version not accepted\n");
|
|
goto error;
|
|
}
|
|
|
|
if (par->synthvid_version == SYNTHVID_VERSION_WIN7)
|
|
screen_depth = SYNTHVID_DEPTH_WIN7;
|
|
else
|
|
screen_depth = SYNTHVID_DEPTH_WIN8;
|
|
|
|
if (synthvid_ver_ge(par->synthvid_version, SYNTHVID_VERSION_WIN10)) {
|
|
ret = synthvid_get_supported_resolution(hdev);
|
|
if (ret)
|
|
pr_info("Failed to get supported resolution from host, use default\n");
|
|
}
|
|
|
|
screen_fb_size = hdev->channel->offermsg.offer.
|
|
mmio_megabytes * 1024 * 1024;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
vmbus_close(hdev->channel);
|
|
return ret;
|
|
}
|
|
|
|
/* Send VRAM and Situation messages to the host */
|
|
static int synthvid_send_config(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf;
|
|
int ret = 0;
|
|
unsigned long t;
|
|
|
|
/* Send VRAM location */
|
|
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 = msg->vram.vram_gpa = par->mmio_pp;
|
|
msg->vram.is_vram_gpa_specified = 1;
|
|
synthvid_send(hdev, msg);
|
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT);
|
|
if (!t) {
|
|
pr_err("Time out on waiting vram location ack\n");
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
if (msg->vram_ack.user_ctx != par->mmio_pp) {
|
|
pr_err("Unable to set VRAM location\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* Send pointer and situation update */
|
|
synthvid_send_ptr(hdev);
|
|
synthvid_send_situ(hdev);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Delayed work callback:
|
|
* It is scheduled to call whenever update request is received and it has
|
|
* not been called in last HVFB_ONDEMAND_THROTTLE time interval.
|
|
*/
|
|
static void hvfb_update_work(struct work_struct *w)
|
|
{
|
|
struct hvfb_par *par = container_of(w, struct hvfb_par, dwork.work);
|
|
struct fb_info *info = par->info;
|
|
unsigned long flags;
|
|
int x1, x2, y1, y2;
|
|
int j;
|
|
|
|
spin_lock_irqsave(&par->delayed_refresh_lock, flags);
|
|
/* Reset the request flag */
|
|
par->delayed_refresh = false;
|
|
|
|
/* Store the dirty rectangle to local variables */
|
|
x1 = par->x1;
|
|
x2 = par->x2;
|
|
y1 = par->y1;
|
|
y2 = par->y2;
|
|
|
|
/* Clear dirty rectangle */
|
|
par->x1 = par->y1 = INT_MAX;
|
|
par->x2 = par->y2 = 0;
|
|
|
|
spin_unlock_irqrestore(&par->delayed_refresh_lock, flags);
|
|
|
|
if (x1 > info->var.xres || x2 > info->var.xres ||
|
|
y1 > info->var.yres || y2 > info->var.yres || x2 <= x1)
|
|
return;
|
|
|
|
/* Copy the dirty rectangle to frame buffer memory */
|
|
if (par->need_docopy)
|
|
for (j = y1; j < y2; j++)
|
|
hvfb_docopy(par,
|
|
j * info->fix.line_length +
|
|
(x1 * screen_depth / 8),
|
|
(x2 - x1) * screen_depth / 8);
|
|
|
|
/* Refresh */
|
|
if (par->fb_ready && par->update)
|
|
synthvid_update(info, x1, y1, x2, y2);
|
|
}
|
|
|
|
/*
|
|
* Control the on-demand refresh frequency. It schedules a delayed
|
|
* screen update if it has not yet.
|
|
*/
|
|
static void hvfb_ondemand_refresh_throttle(struct hvfb_par *par,
|
|
int x1, int y1, int w, int h)
|
|
{
|
|
unsigned long flags;
|
|
int x2 = x1 + w;
|
|
int y2 = y1 + h;
|
|
|
|
spin_lock_irqsave(&par->delayed_refresh_lock, flags);
|
|
|
|
/* Merge dirty rectangle */
|
|
par->x1 = min_t(int, par->x1, x1);
|
|
par->y1 = min_t(int, par->y1, y1);
|
|
par->x2 = max_t(int, par->x2, x2);
|
|
par->y2 = max_t(int, par->y2, y2);
|
|
|
|
/* Schedule a delayed screen update if not yet */
|
|
if (par->delayed_refresh == false) {
|
|
schedule_delayed_work(&par->dwork,
|
|
HVFB_ONDEMAND_THROTTLE);
|
|
par->delayed_refresh = true;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&par->delayed_refresh_lock, flags);
|
|
}
|
|
|
|
static int hvfb_on_panic(struct notifier_block *nb,
|
|
unsigned long e, void *p)
|
|
{
|
|
struct hvfb_par *par;
|
|
struct fb_info *info;
|
|
|
|
par = container_of(nb, struct hvfb_par, hvfb_panic_nb);
|
|
par->synchronous_fb = true;
|
|
info = par->info;
|
|
if (par->need_docopy)
|
|
hvfb_docopy(par, 0, dio_fb_size);
|
|
synthvid_update(info, 0, 0, INT_MAX, INT_MAX);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
/* Framebuffer operation handlers */
|
|
|
|
static int hvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
if (var->xres < HVFB_WIDTH_MIN || var->yres < HVFB_HEIGHT_MIN ||
|
|
var->xres > screen_width || var->yres > screen_height ||
|
|
var->bits_per_pixel != screen_depth)
|
|
return -EINVAL;
|
|
|
|
var->xres_virtual = var->xres;
|
|
var->yres_virtual = var->yres;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_set_par(struct fb_info *info)
|
|
{
|
|
struct hv_device *hdev = device_to_hv_device(info->device);
|
|
|
|
return synthvid_send_situ(hdev);
|
|
}
|
|
|
|
|
|
static inline u32 chan_to_field(u32 chan, struct fb_bitfield *bf)
|
|
{
|
|
return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
|
|
}
|
|
|
|
static int hvfb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp, struct fb_info *info)
|
|
{
|
|
u32 *pal = info->pseudo_palette;
|
|
|
|
if (regno > 15)
|
|
return -EINVAL;
|
|
|
|
pal[regno] = chan_to_field(red, &info->var.red)
|
|
| chan_to_field(green, &info->var.green)
|
|
| chan_to_field(blue, &info->var.blue)
|
|
| chan_to_field(transp, &info->var.transp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_blank(int blank, struct fb_info *info)
|
|
{
|
|
return 1; /* get fb_blank to set the colormap to all black */
|
|
}
|
|
|
|
static void hvfb_cfb_fillrect(struct fb_info *p,
|
|
const struct fb_fillrect *rect)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_fillrect(p, rect);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p, 0, 0, INT_MAX, INT_MAX);
|
|
else
|
|
hvfb_ondemand_refresh_throttle(par, rect->dx, rect->dy,
|
|
rect->width, rect->height);
|
|
}
|
|
|
|
static void hvfb_cfb_copyarea(struct fb_info *p,
|
|
const struct fb_copyarea *area)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_copyarea(p, area);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p, 0, 0, INT_MAX, INT_MAX);
|
|
else
|
|
hvfb_ondemand_refresh_throttle(par, area->dx, area->dy,
|
|
area->width, area->height);
|
|
}
|
|
|
|
static void hvfb_cfb_imageblit(struct fb_info *p,
|
|
const struct fb_image *image)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_imageblit(p, image);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p, 0, 0, INT_MAX, INT_MAX);
|
|
else
|
|
hvfb_ondemand_refresh_throttle(par, image->dx, image->dy,
|
|
image->width, image->height);
|
|
}
|
|
|
|
static const struct fb_ops hvfb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_check_var = hvfb_check_var,
|
|
.fb_set_par = hvfb_set_par,
|
|
.fb_setcolreg = hvfb_setcolreg,
|
|
.fb_fillrect = hvfb_cfb_fillrect,
|
|
.fb_copyarea = hvfb_cfb_copyarea,
|
|
.fb_imageblit = hvfb_cfb_imageblit,
|
|
.fb_blank = hvfb_blank,
|
|
};
|
|
|
|
|
|
/* Get options from kernel paramenter "video=" */
|
|
static void hvfb_get_option(struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
char *opt = NULL, *p;
|
|
uint x = 0, y = 0;
|
|
|
|
if (fb_get_options(KBUILD_MODNAME, &opt) || !opt || !*opt)
|
|
return;
|
|
|
|
p = strsep(&opt, "x");
|
|
if (!*p || kstrtouint(p, 0, &x) ||
|
|
!opt || !*opt || kstrtouint(opt, 0, &y)) {
|
|
pr_err("Screen option is invalid: skipped\n");
|
|
return;
|
|
}
|
|
|
|
if (x < HVFB_WIDTH_MIN || y < HVFB_HEIGHT_MIN ||
|
|
(synthvid_ver_ge(par->synthvid_version, SYNTHVID_VERSION_WIN10) &&
|
|
(x > screen_width_max || y > screen_height_max)) ||
|
|
(par->synthvid_version == SYNTHVID_VERSION_WIN8 &&
|
|
x * y * screen_depth / 8 > SYNTHVID_FB_SIZE_WIN8) ||
|
|
(par->synthvid_version == SYNTHVID_VERSION_WIN7 &&
|
|
(x > SYNTHVID_WIDTH_MAX_WIN7 || y > SYNTHVID_HEIGHT_MAX_WIN7))) {
|
|
pr_err("Screen resolution option is out of range: skipped\n");
|
|
return;
|
|
}
|
|
|
|
screen_width = x;
|
|
screen_height = y;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Allocate enough contiguous physical memory.
|
|
* Return physical address if succeeded or -1 if failed.
|
|
*/
|
|
static phys_addr_t hvfb_get_phymem(struct hv_device *hdev,
|
|
unsigned int request_size)
|
|
{
|
|
struct page *page = NULL;
|
|
dma_addr_t dma_handle;
|
|
void *vmem;
|
|
phys_addr_t paddr = 0;
|
|
unsigned int order = get_order(request_size);
|
|
|
|
if (request_size == 0)
|
|
return -1;
|
|
|
|
if (order < MAX_ORDER) {
|
|
/* Call alloc_pages if the size is less than 2^MAX_ORDER */
|
|
page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
|
|
if (!page)
|
|
return -1;
|
|
|
|
paddr = (page_to_pfn(page) << PAGE_SHIFT);
|
|
} else {
|
|
/* Allocate from CMA */
|
|
hdev->device.coherent_dma_mask = DMA_BIT_MASK(64);
|
|
|
|
vmem = dma_alloc_coherent(&hdev->device,
|
|
round_up(request_size, PAGE_SIZE),
|
|
&dma_handle,
|
|
GFP_KERNEL | __GFP_NOWARN);
|
|
|
|
if (!vmem)
|
|
return -1;
|
|
|
|
paddr = virt_to_phys(vmem);
|
|
}
|
|
|
|
return paddr;
|
|
}
|
|
|
|
/* Release contiguous physical memory */
|
|
static void hvfb_release_phymem(struct hv_device *hdev,
|
|
phys_addr_t paddr, unsigned int size)
|
|
{
|
|
unsigned int order = get_order(size);
|
|
|
|
if (order < MAX_ORDER)
|
|
__free_pages(pfn_to_page(paddr >> PAGE_SHIFT), order);
|
|
else
|
|
dma_free_coherent(&hdev->device,
|
|
round_up(size, PAGE_SIZE),
|
|
phys_to_virt(paddr),
|
|
paddr);
|
|
}
|
|
|
|
|
|
/* Get framebuffer memory from Hyper-V video pci space */
|
|
static int hvfb_getmem(struct hv_device *hdev, struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
struct pci_dev *pdev = NULL;
|
|
void __iomem *fb_virt;
|
|
int gen2vm = efi_enabled(EFI_BOOT);
|
|
resource_size_t pot_start, pot_end;
|
|
phys_addr_t paddr;
|
|
int ret;
|
|
|
|
info->apertures = alloc_apertures(1);
|
|
if (!info->apertures)
|
|
return -ENOMEM;
|
|
|
|
if (!gen2vm) {
|
|
pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT,
|
|
PCI_DEVICE_ID_HYPERV_VIDEO, NULL);
|
|
if (!pdev) {
|
|
pr_err("Unable to find PCI Hyper-V video\n");
|
|
kfree(info->apertures);
|
|
return -ENODEV;
|
|
}
|
|
|
|
info->apertures->ranges[0].base = pci_resource_start(pdev, 0);
|
|
info->apertures->ranges[0].size = pci_resource_len(pdev, 0);
|
|
|
|
/*
|
|
* For Gen 1 VM, we can directly use the contiguous memory
|
|
* from VM. If we succeed, deferred IO happens directly
|
|
* on this allocated framebuffer memory, avoiding extra
|
|
* memory copy.
|
|
*/
|
|
paddr = hvfb_get_phymem(hdev, screen_fb_size);
|
|
if (paddr != (phys_addr_t) -1) {
|
|
par->mmio_pp = paddr;
|
|
par->mmio_vp = par->dio_vp = __va(paddr);
|
|
|
|
info->fix.smem_start = paddr;
|
|
info->fix.smem_len = screen_fb_size;
|
|
info->screen_base = par->mmio_vp;
|
|
info->screen_size = screen_fb_size;
|
|
|
|
par->need_docopy = false;
|
|
goto getmem_done;
|
|
}
|
|
pr_info("Unable to allocate enough contiguous physical memory on Gen 1 VM. Using MMIO instead.\n");
|
|
} else {
|
|
info->apertures->ranges[0].base = screen_info.lfb_base;
|
|
info->apertures->ranges[0].size = screen_info.lfb_size;
|
|
}
|
|
|
|
/*
|
|
* Cannot use the contiguous physical memory.
|
|
* Allocate mmio space for framebuffer.
|
|
*/
|
|
dio_fb_size =
|
|
screen_width * screen_height * screen_depth / 8;
|
|
|
|
if (gen2vm) {
|
|
pot_start = 0;
|
|
pot_end = -1;
|
|
} else {
|
|
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
|
|
pci_resource_len(pdev, 0) < screen_fb_size) {
|
|
pr_err("Resource not available or (0x%lx < 0x%lx)\n",
|
|
(unsigned long) pci_resource_len(pdev, 0),
|
|
(unsigned long) screen_fb_size);
|
|
goto err1;
|
|
}
|
|
|
|
pot_end = pci_resource_end(pdev, 0);
|
|
pot_start = pot_end - screen_fb_size + 1;
|
|
}
|
|
|
|
ret = vmbus_allocate_mmio(&par->mem, hdev, pot_start, pot_end,
|
|
screen_fb_size, 0x100000, true);
|
|
if (ret != 0) {
|
|
pr_err("Unable to allocate framebuffer memory\n");
|
|
goto err1;
|
|
}
|
|
|
|
fb_virt = ioremap(par->mem->start, screen_fb_size);
|
|
if (!fb_virt)
|
|
goto err2;
|
|
|
|
/* Allocate memory for deferred IO */
|
|
par->dio_vp = vzalloc(round_up(dio_fb_size, PAGE_SIZE));
|
|
if (par->dio_vp == NULL)
|
|
goto err3;
|
|
|
|
/* Physical address of FB device */
|
|
par->mmio_pp = par->mem->start;
|
|
/* Virtual address of FB device */
|
|
par->mmio_vp = (unsigned char *) fb_virt;
|
|
|
|
info->fix.smem_start = par->mem->start;
|
|
info->fix.smem_len = dio_fb_size;
|
|
info->screen_base = par->dio_vp;
|
|
info->screen_size = dio_fb_size;
|
|
|
|
getmem_done:
|
|
remove_conflicting_framebuffers(info->apertures,
|
|
KBUILD_MODNAME, false);
|
|
if (!gen2vm)
|
|
pci_dev_put(pdev);
|
|
kfree(info->apertures);
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
iounmap(fb_virt);
|
|
err2:
|
|
vmbus_free_mmio(par->mem->start, screen_fb_size);
|
|
par->mem = NULL;
|
|
err1:
|
|
if (!gen2vm)
|
|
pci_dev_put(pdev);
|
|
kfree(info->apertures);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Release the framebuffer */
|
|
static void hvfb_putmem(struct hv_device *hdev, struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
|
|
if (par->need_docopy) {
|
|
vfree(par->dio_vp);
|
|
iounmap(info->screen_base);
|
|
vmbus_free_mmio(par->mem->start, screen_fb_size);
|
|
} else {
|
|
hvfb_release_phymem(hdev, info->fix.smem_start,
|
|
screen_fb_size);
|
|
}
|
|
|
|
par->mem = NULL;
|
|
}
|
|
|
|
|
|
static int hvfb_probe(struct hv_device *hdev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
struct fb_info *info;
|
|
struct hvfb_par *par;
|
|
int ret;
|
|
|
|
info = framebuffer_alloc(sizeof(struct hvfb_par), &hdev->device);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
par = info->par;
|
|
par->info = info;
|
|
par->fb_ready = false;
|
|
par->need_docopy = true;
|
|
init_completion(&par->wait);
|
|
INIT_DELAYED_WORK(&par->dwork, hvfb_update_work);
|
|
|
|
par->delayed_refresh = false;
|
|
spin_lock_init(&par->delayed_refresh_lock);
|
|
par->x1 = par->y1 = INT_MAX;
|
|
par->x2 = par->y2 = 0;
|
|
|
|
/* Connect to VSP */
|
|
hv_set_drvdata(hdev, info);
|
|
ret = synthvid_connect_vsp(hdev);
|
|
if (ret) {
|
|
pr_err("Unable to connect to VSP\n");
|
|
goto error1;
|
|
}
|
|
|
|
hvfb_get_option(info);
|
|
pr_info("Screen resolution: %dx%d, Color depth: %d\n",
|
|
screen_width, screen_height, screen_depth);
|
|
|
|
ret = hvfb_getmem(hdev, info);
|
|
if (ret) {
|
|
pr_err("No memory for framebuffer\n");
|
|
goto error2;
|
|
}
|
|
|
|
/* Set up fb_info */
|
|
info->flags = FBINFO_DEFAULT;
|
|
|
|
info->var.xres_virtual = info->var.xres = screen_width;
|
|
info->var.yres_virtual = info->var.yres = screen_height;
|
|
info->var.bits_per_pixel = screen_depth;
|
|
|
|
if (info->var.bits_per_pixel == 16) {
|
|
info->var.red = (struct fb_bitfield){11, 5, 0};
|
|
info->var.green = (struct fb_bitfield){5, 6, 0};
|
|
info->var.blue = (struct fb_bitfield){0, 5, 0};
|
|
info->var.transp = (struct fb_bitfield){0, 0, 0};
|
|
} else {
|
|
info->var.red = (struct fb_bitfield){16, 8, 0};
|
|
info->var.green = (struct fb_bitfield){8, 8, 0};
|
|
info->var.blue = (struct fb_bitfield){0, 8, 0};
|
|
info->var.transp = (struct fb_bitfield){24, 8, 0};
|
|
}
|
|
|
|
info->var.activate = FB_ACTIVATE_NOW;
|
|
info->var.height = -1;
|
|
info->var.width = -1;
|
|
info->var.vmode = FB_VMODE_NONINTERLACED;
|
|
|
|
strcpy(info->fix.id, KBUILD_MODNAME);
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.visual = FB_VISUAL_TRUECOLOR;
|
|
info->fix.line_length = screen_width * screen_depth / 8;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
|
|
info->fbops = &hvfb_ops;
|
|
info->pseudo_palette = par->pseudo_palette;
|
|
|
|
/* Initialize deferred IO */
|
|
info->fbdefio = &synthvid_defio;
|
|
fb_deferred_io_init(info);
|
|
|
|
/* Send config to host */
|
|
ret = synthvid_send_config(hdev);
|
|
if (ret)
|
|
goto error;
|
|
|
|
ret = register_framebuffer(info);
|
|
if (ret) {
|
|
pr_err("Unable to register framebuffer\n");
|
|
goto error;
|
|
}
|
|
|
|
par->fb_ready = true;
|
|
|
|
par->synchronous_fb = false;
|
|
par->hvfb_panic_nb.notifier_call = hvfb_on_panic;
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&par->hvfb_panic_nb);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
fb_deferred_io_cleanup(info);
|
|
hvfb_putmem(hdev, info);
|
|
error2:
|
|
vmbus_close(hdev->channel);
|
|
error1:
|
|
cancel_delayed_work_sync(&par->dwork);
|
|
hv_set_drvdata(hdev, NULL);
|
|
framebuffer_release(info);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int hvfb_remove(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
|
|
atomic_notifier_chain_unregister(&panic_notifier_list,
|
|
&par->hvfb_panic_nb);
|
|
|
|
par->update = false;
|
|
par->fb_ready = false;
|
|
|
|
fb_deferred_io_cleanup(info);
|
|
|
|
unregister_framebuffer(info);
|
|
cancel_delayed_work_sync(&par->dwork);
|
|
|
|
vmbus_close(hdev->channel);
|
|
hv_set_drvdata(hdev, NULL);
|
|
|
|
hvfb_putmem(hdev, info);
|
|
framebuffer_release(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_suspend(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
|
|
console_lock();
|
|
|
|
/* 1 means do suspend */
|
|
fb_set_suspend(info, 1);
|
|
|
|
cancel_delayed_work_sync(&par->dwork);
|
|
cancel_delayed_work_sync(&info->deferred_work);
|
|
|
|
par->update_saved = par->update;
|
|
par->update = false;
|
|
par->fb_ready = false;
|
|
|
|
vmbus_close(hdev->channel);
|
|
|
|
console_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_resume(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
int ret;
|
|
|
|
console_lock();
|
|
|
|
ret = synthvid_connect_vsp(hdev);
|
|
if (ret != 0)
|
|
goto out;
|
|
|
|
ret = synthvid_send_config(hdev);
|
|
if (ret != 0) {
|
|
vmbus_close(hdev->channel);
|
|
goto out;
|
|
}
|
|
|
|
par->fb_ready = true;
|
|
par->update = par->update_saved;
|
|
|
|
schedule_delayed_work(&info->deferred_work, info->fbdefio->delay);
|
|
schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY);
|
|
|
|
/* 0 means do resume */
|
|
fb_set_suspend(info, 0);
|
|
|
|
out:
|
|
console_unlock();
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static const struct pci_device_id pci_stub_id_table[] = {
|
|
{
|
|
.vendor = PCI_VENDOR_ID_MICROSOFT,
|
|
.device = PCI_DEVICE_ID_HYPERV_VIDEO,
|
|
},
|
|
{ /* end of list */ }
|
|
};
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Synthetic Video Device GUID */
|
|
{HV_SYNTHVID_GUID},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, pci_stub_id_table);
|
|
MODULE_DEVICE_TABLE(vmbus, id_table);
|
|
|
|
static struct hv_driver hvfb_drv = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = id_table,
|
|
.probe = hvfb_probe,
|
|
.remove = hvfb_remove,
|
|
.suspend = hvfb_suspend,
|
|
.resume = hvfb_resume,
|
|
.driver = {
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
},
|
|
};
|
|
|
|
static int hvfb_pci_stub_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void hvfb_pci_stub_remove(struct pci_dev *pdev)
|
|
{
|
|
}
|
|
|
|
static struct pci_driver hvfb_pci_stub_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = pci_stub_id_table,
|
|
.probe = hvfb_pci_stub_probe,
|
|
.remove = hvfb_pci_stub_remove,
|
|
.driver = {
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
}
|
|
};
|
|
|
|
static int __init hvfb_drv_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = vmbus_driver_register(&hvfb_drv);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
ret = pci_register_driver(&hvfb_pci_stub_driver);
|
|
if (ret != 0) {
|
|
vmbus_driver_unregister(&hvfb_drv);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit hvfb_drv_exit(void)
|
|
{
|
|
pci_unregister_driver(&hvfb_pci_stub_driver);
|
|
vmbus_driver_unregister(&hvfb_drv);
|
|
}
|
|
|
|
module_init(hvfb_drv_init);
|
|
module_exit(hvfb_drv_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver");
|