2 * Copyright (c) 2012, Microsoft Corporation.
5 * Haiyang Zhang <haiyangz@microsoft.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
14 * NON INFRINGEMENT. See the GNU General Public License for more
19 * Hyper-V Synthetic Video Frame Buffer Driver
21 * This is the driver for the Hyper-V Synthetic Video, which supports
22 * screen resolution up to Full HD 1920x1080 with 32 bit color on Windows
23 * Server 2012, and 1600x1200 with 16 bit color on Windows Server 2008 R2
26 * It also solves the double mouse cursor issue of the emulated video mode.
28 * The default screen resolution is 1152x864, which may be changed by a
30 * video=hyperv_fb:<width>x<height>
31 * For example: video=hyperv_fb:1280x1024
33 * Portrait orientation is also supported:
34 * For example: video=hyperv_fb:864x1152
37 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39 #include <linux/module.h>
40 #include <linux/kernel.h>
41 #include <linux/init.h>
42 #include <linux/completion.h>
44 #include <linux/pci.h>
45 #include <linux/efi.h>
47 #include <linux/hyperv.h>
50 /* Hyper-V Synthetic Video Protocol definitions and structures */
51 #define MAX_VMBUS_PKT_SIZE 0x4000
53 #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
54 #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)
55 #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2)
57 #define SYNTHVID_DEPTH_WIN7 16
58 #define SYNTHVID_DEPTH_WIN8 32
60 #define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
61 #define SYNTHVID_WIDTH_MAX_WIN7 1600
62 #define SYNTHVID_HEIGHT_MAX_WIN7 1200
64 #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
66 #define PCI_VENDOR_ID_MICROSOFT 0x1414
67 #define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353
78 u32 size
; /* size of message after this field */
82 enum synthvid_msg_type
{
84 SYNTHVID_VERSION_REQUEST
= 1,
85 SYNTHVID_VERSION_RESPONSE
= 2,
86 SYNTHVID_VRAM_LOCATION
= 3,
87 SYNTHVID_VRAM_LOCATION_ACK
= 4,
88 SYNTHVID_SITUATION_UPDATE
= 5,
89 SYNTHVID_SITUATION_UPDATE_ACK
= 6,
90 SYNTHVID_POINTER_POSITION
= 7,
91 SYNTHVID_POINTER_SHAPE
= 8,
92 SYNTHVID_FEATURE_CHANGE
= 9,
98 struct synthvid_msg_hdr
{
100 u32 size
; /* size of this header + payload after this field*/
104 struct synthvid_version_req
{
108 struct synthvid_version_resp
{
111 u8 max_video_outputs
;
114 struct synthvid_vram_location
{
116 u8 is_vram_gpa_specified
;
120 struct synthvid_vram_location_ack
{
124 struct video_output_situation
{
133 struct synthvid_situation_update
{
135 u8 video_output_count
;
136 struct video_output_situation video_output
[1];
139 struct synthvid_situation_update_ack
{
143 struct synthvid_pointer_position
{
151 #define CURSOR_MAX_X 96
152 #define CURSOR_MAX_Y 96
153 #define CURSOR_ARGB_PIXEL_SIZE 4
154 #define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE)
155 #define CURSOR_COMPLETE (-1)
157 struct synthvid_pointer_shape
{
160 u32 width
; /* CURSOR_MAX_X at most */
161 u32 height
; /* CURSOR_MAX_Y at most */
162 u32 hot_x
; /* hotspot relative to upper-left of pointer image */
167 struct synthvid_feature_change
{
169 u8 is_ptr_pos_needed
;
170 u8 is_ptr_shape_needed
;
175 s32 x1
, y1
; /* top left corner */
176 s32 x2
, y2
; /* bottom right corner, exclusive */
179 struct synthvid_dirt
{
185 struct synthvid_msg
{
186 struct pipe_msg_hdr pipe_hdr
;
187 struct synthvid_msg_hdr vid_hdr
;
189 struct synthvid_version_req ver_req
;
190 struct synthvid_version_resp ver_resp
;
191 struct synthvid_vram_location vram
;
192 struct synthvid_vram_location_ack vram_ack
;
193 struct synthvid_situation_update situ
;
194 struct synthvid_situation_update_ack situ_ack
;
195 struct synthvid_pointer_position ptr_pos
;
196 struct synthvid_pointer_shape ptr_shape
;
197 struct synthvid_feature_change feature_chg
;
198 struct synthvid_dirt dirt
;
204 /* FB driver definitions and structures */
205 #define HVFB_WIDTH 1152 /* default screen width */
206 #define HVFB_HEIGHT 864 /* default screen height */
207 #define HVFB_WIDTH_MIN 640
208 #define HVFB_HEIGHT_MIN 480
210 #define RING_BUFSIZE (256 * 1024)
211 #define VSP_TIMEOUT (10 * HZ)
212 #define HVFB_UPDATE_DELAY (HZ / 20)
215 struct fb_info
*info
;
217 bool fb_ready
; /* fb device is ready */
218 struct completion wait
;
219 u32 synthvid_version
;
221 struct delayed_work dwork
;
224 u32 pseudo_palette
[16];
225 u8 init_buf
[MAX_VMBUS_PKT_SIZE
];
226 u8 recv_buf
[MAX_VMBUS_PKT_SIZE
];
228 /* If true, the VSC notifies the VSP on every framebuffer change */
231 struct notifier_block hvfb_panic_nb
;
234 static uint screen_width
= HVFB_WIDTH
;
235 static uint screen_height
= HVFB_HEIGHT
;
236 static uint screen_depth
;
237 static uint screen_fb_size
;
239 /* Send message to Hyper-V host */
240 static inline int synthvid_send(struct hv_device
*hdev
,
241 struct synthvid_msg
*msg
)
243 static atomic64_t request_id
= ATOMIC64_INIT(0);
246 msg
->pipe_hdr
.type
= PIPE_MSG_DATA
;
247 msg
->pipe_hdr
.size
= msg
->vid_hdr
.size
;
249 ret
= vmbus_sendpacket(hdev
->channel
, msg
,
250 msg
->vid_hdr
.size
+ sizeof(struct pipe_msg_hdr
),
251 atomic64_inc_return(&request_id
),
252 VM_PKT_DATA_INBAND
, 0);
255 pr_err("Unable to send packet via vmbus\n");
261 /* Send screen resolution info to host */
262 static int synthvid_send_situ(struct hv_device
*hdev
)
264 struct fb_info
*info
= hv_get_drvdata(hdev
);
265 struct synthvid_msg msg
;
270 memset(&msg
, 0, sizeof(struct synthvid_msg
));
272 msg
.vid_hdr
.type
= SYNTHVID_SITUATION_UPDATE
;
273 msg
.vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
274 sizeof(struct synthvid_situation_update
);
275 msg
.situ
.user_ctx
= 0;
276 msg
.situ
.video_output_count
= 1;
277 msg
.situ
.video_output
[0].active
= 1;
278 msg
.situ
.video_output
[0].vram_offset
= 0;
279 msg
.situ
.video_output
[0].depth_bits
= info
->var
.bits_per_pixel
;
280 msg
.situ
.video_output
[0].width_pixels
= info
->var
.xres
;
281 msg
.situ
.video_output
[0].height_pixels
= info
->var
.yres
;
282 msg
.situ
.video_output
[0].pitch_bytes
= info
->fix
.line_length
;
284 synthvid_send(hdev
, &msg
);
289 /* Send mouse pointer info to host */
290 static int synthvid_send_ptr(struct hv_device
*hdev
)
292 struct synthvid_msg msg
;
294 memset(&msg
, 0, sizeof(struct synthvid_msg
));
295 msg
.vid_hdr
.type
= SYNTHVID_POINTER_POSITION
;
296 msg
.vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
297 sizeof(struct synthvid_pointer_position
);
298 msg
.ptr_pos
.is_visible
= 1;
299 msg
.ptr_pos
.video_output
= 0;
300 msg
.ptr_pos
.image_x
= 0;
301 msg
.ptr_pos
.image_y
= 0;
302 synthvid_send(hdev
, &msg
);
304 memset(&msg
, 0, sizeof(struct synthvid_msg
));
305 msg
.vid_hdr
.type
= SYNTHVID_POINTER_SHAPE
;
306 msg
.vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
307 sizeof(struct synthvid_pointer_shape
);
308 msg
.ptr_shape
.part_idx
= CURSOR_COMPLETE
;
309 msg
.ptr_shape
.is_argb
= 1;
310 msg
.ptr_shape
.width
= 1;
311 msg
.ptr_shape
.height
= 1;
312 msg
.ptr_shape
.hot_x
= 0;
313 msg
.ptr_shape
.hot_y
= 0;
314 msg
.ptr_shape
.data
[0] = 0;
315 msg
.ptr_shape
.data
[1] = 1;
316 msg
.ptr_shape
.data
[2] = 1;
317 msg
.ptr_shape
.data
[3] = 1;
318 synthvid_send(hdev
, &msg
);
323 /* Send updated screen area (dirty rectangle) location to host */
324 static int synthvid_update(struct fb_info
*info
)
326 struct hv_device
*hdev
= device_to_hv_device(info
->device
);
327 struct synthvid_msg msg
;
329 memset(&msg
, 0, sizeof(struct synthvid_msg
));
331 msg
.vid_hdr
.type
= SYNTHVID_DIRT
;
332 msg
.vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
333 sizeof(struct synthvid_dirt
);
334 msg
.dirt
.video_output
= 0;
335 msg
.dirt
.dirt_count
= 1;
336 msg
.dirt
.rect
[0].x1
= 0;
337 msg
.dirt
.rect
[0].y1
= 0;
338 msg
.dirt
.rect
[0].x2
= info
->var
.xres
;
339 msg
.dirt
.rect
[0].y2
= info
->var
.yres
;
341 synthvid_send(hdev
, &msg
);
348 * Actions on received messages from host:
349 * Complete the wait event.
350 * Or, reply with screen and cursor info.
352 static void synthvid_recv_sub(struct hv_device
*hdev
)
354 struct fb_info
*info
= hv_get_drvdata(hdev
);
355 struct hvfb_par
*par
;
356 struct synthvid_msg
*msg
;
362 msg
= (struct synthvid_msg
*)par
->recv_buf
;
364 /* Complete the wait event */
365 if (msg
->vid_hdr
.type
== SYNTHVID_VERSION_RESPONSE
||
366 msg
->vid_hdr
.type
== SYNTHVID_VRAM_LOCATION_ACK
) {
367 memcpy(par
->init_buf
, msg
, MAX_VMBUS_PKT_SIZE
);
368 complete(&par
->wait
);
372 /* Reply with screen and cursor info */
373 if (msg
->vid_hdr
.type
== SYNTHVID_FEATURE_CHANGE
) {
375 synthvid_send_ptr(hdev
);
376 synthvid_send_situ(hdev
);
379 par
->update
= msg
->feature_chg
.is_dirt_needed
;
381 schedule_delayed_work(&par
->dwork
, HVFB_UPDATE_DELAY
);
385 /* Receive callback for messages from the host */
386 static void synthvid_receive(void *ctx
)
388 struct hv_device
*hdev
= ctx
;
389 struct fb_info
*info
= hv_get_drvdata(hdev
);
390 struct hvfb_par
*par
;
391 struct synthvid_msg
*recv_buf
;
400 recv_buf
= (struct synthvid_msg
*)par
->recv_buf
;
403 ret
= vmbus_recvpacket(hdev
->channel
, recv_buf
,
405 &bytes_recvd
, &req_id
);
406 if (bytes_recvd
> 0 &&
407 recv_buf
->pipe_hdr
.type
== PIPE_MSG_DATA
)
408 synthvid_recv_sub(hdev
);
409 } while (bytes_recvd
> 0 && ret
== 0);
412 /* Check synthetic video protocol version with the host */
413 static int synthvid_negotiate_ver(struct hv_device
*hdev
, u32 ver
)
415 struct fb_info
*info
= hv_get_drvdata(hdev
);
416 struct hvfb_par
*par
= info
->par
;
417 struct synthvid_msg
*msg
= (struct synthvid_msg
*)par
->init_buf
;
420 memset(msg
, 0, sizeof(struct synthvid_msg
));
421 msg
->vid_hdr
.type
= SYNTHVID_VERSION_REQUEST
;
422 msg
->vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
423 sizeof(struct synthvid_version_req
);
424 msg
->ver_req
.version
= ver
;
425 synthvid_send(hdev
, msg
);
427 t
= wait_for_completion_timeout(&par
->wait
, VSP_TIMEOUT
);
429 pr_err("Time out on waiting version response\n");
433 if (!msg
->ver_resp
.is_accepted
) {
438 par
->synthvid_version
= ver
;
444 /* Connect to VSP (Virtual Service Provider) on host */
445 static int synthvid_connect_vsp(struct hv_device
*hdev
)
447 struct fb_info
*info
= hv_get_drvdata(hdev
);
448 struct hvfb_par
*par
= info
->par
;
451 ret
= vmbus_open(hdev
->channel
, RING_BUFSIZE
, RING_BUFSIZE
,
452 NULL
, 0, synthvid_receive
, hdev
);
454 pr_err("Unable to open vmbus channel\n");
458 /* Negotiate the protocol version with host */
459 if (vmbus_proto_version
== VERSION_WS2008
||
460 vmbus_proto_version
== VERSION_WIN7
)
461 ret
= synthvid_negotiate_ver(hdev
, SYNTHVID_VERSION_WIN7
);
463 ret
= synthvid_negotiate_ver(hdev
, SYNTHVID_VERSION_WIN8
);
466 pr_err("Synthetic video device version not accepted\n");
470 if (par
->synthvid_version
== SYNTHVID_VERSION_WIN7
)
471 screen_depth
= SYNTHVID_DEPTH_WIN7
;
473 screen_depth
= SYNTHVID_DEPTH_WIN8
;
475 screen_fb_size
= hdev
->channel
->offermsg
.offer
.
476 mmio_megabytes
* 1024 * 1024;
481 vmbus_close(hdev
->channel
);
485 /* Send VRAM and Situation messages to the host */
486 static int synthvid_send_config(struct hv_device
*hdev
)
488 struct fb_info
*info
= hv_get_drvdata(hdev
);
489 struct hvfb_par
*par
= info
->par
;
490 struct synthvid_msg
*msg
= (struct synthvid_msg
*)par
->init_buf
;
493 /* Send VRAM location */
494 memset(msg
, 0, sizeof(struct synthvid_msg
));
495 msg
->vid_hdr
.type
= SYNTHVID_VRAM_LOCATION
;
496 msg
->vid_hdr
.size
= sizeof(struct synthvid_msg_hdr
) +
497 sizeof(struct synthvid_vram_location
);
498 msg
->vram
.user_ctx
= msg
->vram
.vram_gpa
= info
->fix
.smem_start
;
499 msg
->vram
.is_vram_gpa_specified
= 1;
500 synthvid_send(hdev
, msg
);
502 t
= wait_for_completion_timeout(&par
->wait
, VSP_TIMEOUT
);
504 pr_err("Time out on waiting vram location ack\n");
508 if (msg
->vram_ack
.user_ctx
!= info
->fix
.smem_start
) {
509 pr_err("Unable to set VRAM location\n");
514 /* Send pointer and situation update */
515 synthvid_send_ptr(hdev
);
516 synthvid_send_situ(hdev
);
524 * Delayed work callback:
525 * It is called at HVFB_UPDATE_DELAY or longer time interval to process
526 * screen updates. It is re-scheduled if further update is necessary.
528 static void hvfb_update_work(struct work_struct
*w
)
530 struct hvfb_par
*par
= container_of(w
, struct hvfb_par
, dwork
.work
);
531 struct fb_info
*info
= par
->info
;
534 synthvid_update(info
);
537 schedule_delayed_work(&par
->dwork
, HVFB_UPDATE_DELAY
);
540 static int hvfb_on_panic(struct notifier_block
*nb
,
541 unsigned long e
, void *p
)
543 struct hvfb_par
*par
;
544 struct fb_info
*info
;
546 par
= container_of(nb
, struct hvfb_par
, hvfb_panic_nb
);
547 par
->synchronous_fb
= true;
549 synthvid_update(info
);
554 /* Framebuffer operation handlers */
556 static int hvfb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
558 if (var
->xres
< HVFB_WIDTH_MIN
|| var
->yres
< HVFB_HEIGHT_MIN
||
559 var
->xres
> screen_width
|| var
->yres
> screen_height
||
560 var
->bits_per_pixel
!= screen_depth
)
563 var
->xres_virtual
= var
->xres
;
564 var
->yres_virtual
= var
->yres
;
569 static int hvfb_set_par(struct fb_info
*info
)
571 struct hv_device
*hdev
= device_to_hv_device(info
->device
);
573 return synthvid_send_situ(hdev
);
577 static inline u32
chan_to_field(u32 chan
, struct fb_bitfield
*bf
)
579 return ((chan
& 0xffff) >> (16 - bf
->length
)) << bf
->offset
;
582 static int hvfb_setcolreg(unsigned regno
, unsigned red
, unsigned green
,
583 unsigned blue
, unsigned transp
, struct fb_info
*info
)
585 u32
*pal
= info
->pseudo_palette
;
590 pal
[regno
] = chan_to_field(red
, &info
->var
.red
)
591 | chan_to_field(green
, &info
->var
.green
)
592 | chan_to_field(blue
, &info
->var
.blue
)
593 | chan_to_field(transp
, &info
->var
.transp
);
598 static int hvfb_blank(int blank
, struct fb_info
*info
)
600 return 1; /* get fb_blank to set the colormap to all black */
603 static void hvfb_cfb_fillrect(struct fb_info
*p
,
604 const struct fb_fillrect
*rect
)
606 struct hvfb_par
*par
= p
->par
;
608 cfb_fillrect(p
, rect
);
609 if (par
->synchronous_fb
)
613 static void hvfb_cfb_copyarea(struct fb_info
*p
,
614 const struct fb_copyarea
*area
)
616 struct hvfb_par
*par
= p
->par
;
618 cfb_copyarea(p
, area
);
619 if (par
->synchronous_fb
)
623 static void hvfb_cfb_imageblit(struct fb_info
*p
,
624 const struct fb_image
*image
)
626 struct hvfb_par
*par
= p
->par
;
628 cfb_imageblit(p
, image
);
629 if (par
->synchronous_fb
)
633 static struct fb_ops hvfb_ops
= {
634 .owner
= THIS_MODULE
,
635 .fb_check_var
= hvfb_check_var
,
636 .fb_set_par
= hvfb_set_par
,
637 .fb_setcolreg
= hvfb_setcolreg
,
638 .fb_fillrect
= hvfb_cfb_fillrect
,
639 .fb_copyarea
= hvfb_cfb_copyarea
,
640 .fb_imageblit
= hvfb_cfb_imageblit
,
641 .fb_blank
= hvfb_blank
,
645 /* Get options from kernel paramenter "video=" */
646 static void hvfb_get_option(struct fb_info
*info
)
648 struct hvfb_par
*par
= info
->par
;
649 char *opt
= NULL
, *p
;
652 if (fb_get_options(KBUILD_MODNAME
, &opt
) || !opt
|| !*opt
)
655 p
= strsep(&opt
, "x");
656 if (!*p
|| kstrtouint(p
, 0, &x
) ||
657 !opt
|| !*opt
|| kstrtouint(opt
, 0, &y
)) {
658 pr_err("Screen option is invalid: skipped\n");
662 if (x
< HVFB_WIDTH_MIN
|| y
< HVFB_HEIGHT_MIN
||
663 (par
->synthvid_version
== SYNTHVID_VERSION_WIN8
&&
664 x
* y
* screen_depth
/ 8 > SYNTHVID_FB_SIZE_WIN8
) ||
665 (par
->synthvid_version
== SYNTHVID_VERSION_WIN7
&&
666 (x
> SYNTHVID_WIDTH_MAX_WIN7
|| y
> SYNTHVID_HEIGHT_MAX_WIN7
))) {
667 pr_err("Screen resolution option is out of range: skipped\n");
677 /* Get framebuffer memory from Hyper-V video pci space */
678 static int hvfb_getmem(struct fb_info
*info
)
680 struct hvfb_par
*par
= info
->par
;
681 struct pci_dev
*pdev
= NULL
;
682 void __iomem
*fb_virt
;
683 int gen2vm
= efi_enabled(EFI_BOOT
);
686 par
->mem
.name
= KBUILD_MODNAME
;
687 par
->mem
.flags
= IORESOURCE_MEM
| IORESOURCE_BUSY
;
689 ret
= allocate_resource(&hyperv_mmio
, &par
->mem
,
695 pr_err("Unable to allocate framebuffer memory\n");
699 pdev
= pci_get_device(PCI_VENDOR_ID_MICROSOFT
,
700 PCI_DEVICE_ID_HYPERV_VIDEO
, NULL
);
702 pr_err("Unable to find PCI Hyper-V video\n");
706 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
) ||
707 pci_resource_len(pdev
, 0) < screen_fb_size
)
710 par
->mem
.end
= pci_resource_end(pdev
, 0);
711 par
->mem
.start
= par
->mem
.end
- screen_fb_size
+ 1;
712 ret
= request_resource(&pdev
->resource
[0], &par
->mem
);
714 pr_err("Unable to request framebuffer memory\n");
719 fb_virt
= ioremap(par
->mem
.start
, screen_fb_size
);
723 info
->apertures
= alloc_apertures(1);
724 if (!info
->apertures
)
728 info
->apertures
->ranges
[0].base
= screen_info
.lfb_base
;
729 info
->apertures
->ranges
[0].size
= screen_info
.lfb_size
;
730 remove_conflicting_framebuffers(info
->apertures
,
731 KBUILD_MODNAME
, false);
733 info
->apertures
->ranges
[0].base
= pci_resource_start(pdev
, 0);
734 info
->apertures
->ranges
[0].size
= pci_resource_len(pdev
, 0);
737 info
->fix
.smem_start
= par
->mem
.start
;
738 info
->fix
.smem_len
= screen_fb_size
;
739 info
->screen_base
= fb_virt
;
740 info
->screen_size
= screen_fb_size
;
750 release_resource(&par
->mem
);
758 /* Release the framebuffer */
759 static void hvfb_putmem(struct fb_info
*info
)
761 struct hvfb_par
*par
= info
->par
;
763 iounmap(info
->screen_base
);
764 release_resource(&par
->mem
);
768 static int hvfb_probe(struct hv_device
*hdev
,
769 const struct hv_vmbus_device_id
*dev_id
)
771 struct fb_info
*info
;
772 struct hvfb_par
*par
;
775 info
= framebuffer_alloc(sizeof(struct hvfb_par
), &hdev
->device
);
777 pr_err("No memory for framebuffer info\n");
783 par
->fb_ready
= false;
784 init_completion(&par
->wait
);
785 INIT_DELAYED_WORK(&par
->dwork
, hvfb_update_work
);
788 hv_set_drvdata(hdev
, info
);
789 ret
= synthvid_connect_vsp(hdev
);
791 pr_err("Unable to connect to VSP\n");
795 ret
= hvfb_getmem(info
);
797 pr_err("No memory for framebuffer\n");
801 hvfb_get_option(info
);
802 pr_info("Screen resolution: %dx%d, Color depth: %d\n",
803 screen_width
, screen_height
, screen_depth
);
807 info
->flags
= FBINFO_DEFAULT
;
809 info
->var
.xres_virtual
= info
->var
.xres
= screen_width
;
810 info
->var
.yres_virtual
= info
->var
.yres
= screen_height
;
811 info
->var
.bits_per_pixel
= screen_depth
;
813 if (info
->var
.bits_per_pixel
== 16) {
814 info
->var
.red
= (struct fb_bitfield
){11, 5, 0};
815 info
->var
.green
= (struct fb_bitfield
){5, 6, 0};
816 info
->var
.blue
= (struct fb_bitfield
){0, 5, 0};
817 info
->var
.transp
= (struct fb_bitfield
){0, 0, 0};
819 info
->var
.red
= (struct fb_bitfield
){16, 8, 0};
820 info
->var
.green
= (struct fb_bitfield
){8, 8, 0};
821 info
->var
.blue
= (struct fb_bitfield
){0, 8, 0};
822 info
->var
.transp
= (struct fb_bitfield
){24, 8, 0};
825 info
->var
.activate
= FB_ACTIVATE_NOW
;
826 info
->var
.height
= -1;
827 info
->var
.width
= -1;
828 info
->var
.vmode
= FB_VMODE_NONINTERLACED
;
830 strcpy(info
->fix
.id
, KBUILD_MODNAME
);
831 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
832 info
->fix
.visual
= FB_VISUAL_TRUECOLOR
;
833 info
->fix
.line_length
= screen_width
* screen_depth
/ 8;
834 info
->fix
.accel
= FB_ACCEL_NONE
;
836 info
->fbops
= &hvfb_ops
;
837 info
->pseudo_palette
= par
->pseudo_palette
;
839 /* Send config to host */
840 ret
= synthvid_send_config(hdev
);
844 ret
= register_framebuffer(info
);
846 pr_err("Unable to register framebuffer\n");
850 par
->fb_ready
= true;
852 par
->synchronous_fb
= false;
853 par
->hvfb_panic_nb
.notifier_call
= hvfb_on_panic
;
854 atomic_notifier_chain_register(&panic_notifier_list
,
855 &par
->hvfb_panic_nb
);
862 vmbus_close(hdev
->channel
);
864 cancel_delayed_work_sync(&par
->dwork
);
865 hv_set_drvdata(hdev
, NULL
);
866 framebuffer_release(info
);
871 static int hvfb_remove(struct hv_device
*hdev
)
873 struct fb_info
*info
= hv_get_drvdata(hdev
);
874 struct hvfb_par
*par
= info
->par
;
876 atomic_notifier_chain_unregister(&panic_notifier_list
,
877 &par
->hvfb_panic_nb
);
880 par
->fb_ready
= false;
882 unregister_framebuffer(info
);
883 cancel_delayed_work_sync(&par
->dwork
);
885 vmbus_close(hdev
->channel
);
886 hv_set_drvdata(hdev
, NULL
);
889 framebuffer_release(info
);
895 static DEFINE_PCI_DEVICE_TABLE(pci_stub_id_table
) = {
897 .vendor
= PCI_VENDOR_ID_MICROSOFT
,
898 .device
= PCI_DEVICE_ID_HYPERV_VIDEO
,
900 { /* end of list */ }
903 static const struct hv_vmbus_device_id id_table
[] = {
904 /* Synthetic Video Device GUID */
909 MODULE_DEVICE_TABLE(pci
, pci_stub_id_table
);
910 MODULE_DEVICE_TABLE(vmbus
, id_table
);
912 static struct hv_driver hvfb_drv
= {
913 .name
= KBUILD_MODNAME
,
914 .id_table
= id_table
,
916 .remove
= hvfb_remove
,
919 static int hvfb_pci_stub_probe(struct pci_dev
*pdev
,
920 const struct pci_device_id
*ent
)
925 static void hvfb_pci_stub_remove(struct pci_dev
*pdev
)
929 static struct pci_driver hvfb_pci_stub_driver
= {
930 .name
= KBUILD_MODNAME
,
931 .id_table
= pci_stub_id_table
,
932 .probe
= hvfb_pci_stub_probe
,
933 .remove
= hvfb_pci_stub_remove
,
936 static int __init
hvfb_drv_init(void)
940 ret
= vmbus_driver_register(&hvfb_drv
);
944 ret
= pci_register_driver(&hvfb_pci_stub_driver
);
946 vmbus_driver_unregister(&hvfb_drv
);
953 static void __exit
hvfb_drv_exit(void)
955 pci_unregister_driver(&hvfb_pci_stub_driver
);
956 vmbus_driver_unregister(&hvfb_drv
);
959 module_init(hvfb_drv_init
);
960 module_exit(hvfb_drv_exit
);
962 MODULE_LICENSE("GPL");
963 MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver");