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68a2d20b HZ |
1 | /* |
2 | * Copyright (c) 2012, Microsoft Corporation. | |
3 | * | |
4 | * Author: | |
5 | * Haiyang Zhang <haiyangz@microsoft.com> | |
6 | * | |
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. | |
10 | * | |
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 | |
15 | * details. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * Hyper-V Synthetic Video Frame Buffer Driver | |
20 | * | |
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 | |
24 | * or earlier. | |
25 | * | |
26 | * It also solves the double mouse cursor issue of the emulated video mode. | |
27 | * | |
28 | * The default screen resolution is 1152x864, which may be changed by a | |
29 | * kernel parameter: | |
30 | * video=hyperv_fb:<width>x<height> | |
31 | * For example: video=hyperv_fb:1280x1024 | |
32 | * | |
33 | * Portrait orientation is also supported: | |
34 | * For example: video=hyperv_fb:864x1152 | |
35 | */ | |
36 | ||
37 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
38 | ||
39 | #include <linux/module.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/completion.h> | |
43 | #include <linux/fb.h> | |
44 | #include <linux/pci.h> | |
9069fd54 | 45 | #include <linux/efi.h> |
68a2d20b HZ |
46 | |
47 | #include <linux/hyperv.h> | |
48 | ||
49 | ||
50 | /* Hyper-V Synthetic Video Protocol definitions and structures */ | |
51 | #define MAX_VMBUS_PKT_SIZE 0x4000 | |
52 | ||
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) | |
56 | ||
57 | #define SYNTHVID_DEPTH_WIN7 16 | |
58 | #define SYNTHVID_DEPTH_WIN8 32 | |
59 | ||
60 | #define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024) | |
61 | #define SYNTHVID_WIDTH_MAX_WIN7 1600 | |
62 | #define SYNTHVID_HEIGHT_MAX_WIN7 1200 | |
63 | ||
64 | #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) | |
65 | ||
66 | #define PCI_VENDOR_ID_MICROSOFT 0x1414 | |
67 | #define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353 | |
68 | ||
69 | ||
70 | enum pipe_msg_type { | |
71 | PIPE_MSG_INVALID, | |
72 | PIPE_MSG_DATA, | |
73 | PIPE_MSG_MAX | |
74 | }; | |
75 | ||
76 | struct pipe_msg_hdr { | |
77 | u32 type; | |
78 | u32 size; /* size of message after this field */ | |
79 | } __packed; | |
80 | ||
81 | ||
82 | enum synthvid_msg_type { | |
83 | SYNTHVID_ERROR = 0, | |
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, | |
93 | SYNTHVID_DIRT = 10, | |
94 | ||
95 | SYNTHVID_MAX = 11 | |
96 | }; | |
97 | ||
98 | struct synthvid_msg_hdr { | |
99 | u32 type; | |
100 | u32 size; /* size of this header + payload after this field*/ | |
101 | } __packed; | |
102 | ||
103 | ||
104 | struct synthvid_version_req { | |
105 | u32 version; | |
106 | } __packed; | |
107 | ||
108 | struct synthvid_version_resp { | |
109 | u32 version; | |
110 | u8 is_accepted; | |
111 | u8 max_video_outputs; | |
112 | } __packed; | |
113 | ||
114 | struct synthvid_vram_location { | |
115 | u64 user_ctx; | |
116 | u8 is_vram_gpa_specified; | |
117 | u64 vram_gpa; | |
118 | } __packed; | |
119 | ||
120 | struct synthvid_vram_location_ack { | |
121 | u64 user_ctx; | |
122 | } __packed; | |
123 | ||
124 | struct video_output_situation { | |
125 | u8 active; | |
126 | u32 vram_offset; | |
127 | u8 depth_bits; | |
128 | u32 width_pixels; | |
129 | u32 height_pixels; | |
130 | u32 pitch_bytes; | |
131 | } __packed; | |
132 | ||
133 | struct synthvid_situation_update { | |
134 | u64 user_ctx; | |
135 | u8 video_output_count; | |
136 | struct video_output_situation video_output[1]; | |
137 | } __packed; | |
138 | ||
139 | struct synthvid_situation_update_ack { | |
140 | u64 user_ctx; | |
141 | } __packed; | |
142 | ||
143 | struct synthvid_pointer_position { | |
144 | u8 is_visible; | |
145 | u8 video_output; | |
146 | s32 image_x; | |
147 | s32 image_y; | |
148 | } __packed; | |
149 | ||
150 | ||
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) | |
156 | ||
157 | struct synthvid_pointer_shape { | |
158 | u8 part_idx; | |
159 | u8 is_argb; | |
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 */ | |
163 | u32 hot_y; | |
164 | u8 data[4]; | |
165 | } __packed; | |
166 | ||
167 | struct synthvid_feature_change { | |
168 | u8 is_dirt_needed; | |
169 | u8 is_ptr_pos_needed; | |
170 | u8 is_ptr_shape_needed; | |
171 | u8 is_situ_needed; | |
172 | } __packed; | |
173 | ||
174 | struct rect { | |
175 | s32 x1, y1; /* top left corner */ | |
176 | s32 x2, y2; /* bottom right corner, exclusive */ | |
177 | } __packed; | |
178 | ||
179 | struct synthvid_dirt { | |
180 | u8 video_output; | |
181 | u8 dirt_count; | |
182 | struct rect rect[1]; | |
183 | } __packed; | |
184 | ||
185 | struct synthvid_msg { | |
186 | struct pipe_msg_hdr pipe_hdr; | |
187 | struct synthvid_msg_hdr vid_hdr; | |
188 | union { | |
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; | |
199 | }; | |
200 | } __packed; | |
201 | ||
202 | ||
203 | ||
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 | |
209 | ||
210 | #define RING_BUFSIZE (256 * 1024) | |
211 | #define VSP_TIMEOUT (10 * HZ) | |
212 | #define HVFB_UPDATE_DELAY (HZ / 20) | |
213 | ||
214 | struct hvfb_par { | |
215 | struct fb_info *info; | |
9069fd54 | 216 | struct resource mem; |
68a2d20b HZ |
217 | bool fb_ready; /* fb device is ready */ |
218 | struct completion wait; | |
219 | u32 synthvid_version; | |
220 | ||
221 | struct delayed_work dwork; | |
222 | bool update; | |
223 | ||
224 | u32 pseudo_palette[16]; | |
225 | u8 init_buf[MAX_VMBUS_PKT_SIZE]; | |
226 | u8 recv_buf[MAX_VMBUS_PKT_SIZE]; | |
3686fe96 DC |
227 | |
228 | /* If true, the VSC notifies the VSP on every framebuffer change */ | |
229 | bool synchronous_fb; | |
230 | ||
231 | struct notifier_block hvfb_panic_nb; | |
68a2d20b HZ |
232 | }; |
233 | ||
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; | |
238 | ||
239 | /* Send message to Hyper-V host */ | |
240 | static inline int synthvid_send(struct hv_device *hdev, | |
241 | struct synthvid_msg *msg) | |
242 | { | |
243 | static atomic64_t request_id = ATOMIC64_INIT(0); | |
244 | int ret; | |
245 | ||
246 | msg->pipe_hdr.type = PIPE_MSG_DATA; | |
247 | msg->pipe_hdr.size = msg->vid_hdr.size; | |
248 | ||
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); | |
253 | ||
254 | if (ret) | |
255 | pr_err("Unable to send packet via vmbus\n"); | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | ||
261 | /* Send screen resolution info to host */ | |
262 | static int synthvid_send_situ(struct hv_device *hdev) | |
263 | { | |
264 | struct fb_info *info = hv_get_drvdata(hdev); | |
265 | struct synthvid_msg msg; | |
266 | ||
267 | if (!info) | |
268 | return -ENODEV; | |
269 | ||
270 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
271 | ||
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; | |
283 | ||
284 | synthvid_send(hdev, &msg); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* Send mouse pointer info to host */ | |
290 | static int synthvid_send_ptr(struct hv_device *hdev) | |
291 | { | |
292 | struct synthvid_msg msg; | |
293 | ||
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); | |
303 | ||
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); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | /* Send updated screen area (dirty rectangle) location to host */ | |
324 | static int synthvid_update(struct fb_info *info) | |
325 | { | |
326 | struct hv_device *hdev = device_to_hv_device(info->device); | |
327 | struct synthvid_msg msg; | |
328 | ||
329 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
330 | ||
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; | |
340 | ||
341 | synthvid_send(hdev, &msg); | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | ||
347 | /* | |
348 | * Actions on received messages from host: | |
349 | * Complete the wait event. | |
350 | * Or, reply with screen and cursor info. | |
351 | */ | |
352 | static void synthvid_recv_sub(struct hv_device *hdev) | |
353 | { | |
354 | struct fb_info *info = hv_get_drvdata(hdev); | |
355 | struct hvfb_par *par; | |
356 | struct synthvid_msg *msg; | |
357 | ||
358 | if (!info) | |
359 | return; | |
360 | ||
361 | par = info->par; | |
362 | msg = (struct synthvid_msg *)par->recv_buf; | |
363 | ||
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); | |
369 | return; | |
370 | } | |
371 | ||
372 | /* Reply with screen and cursor info */ | |
373 | if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { | |
374 | if (par->fb_ready) { | |
375 | synthvid_send_ptr(hdev); | |
376 | synthvid_send_situ(hdev); | |
377 | } | |
378 | ||
379 | par->update = msg->feature_chg.is_dirt_needed; | |
380 | if (par->update) | |
381 | schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); | |
382 | } | |
383 | } | |
384 | ||
385 | /* Receive callback for messages from the host */ | |
386 | static void synthvid_receive(void *ctx) | |
387 | { | |
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; | |
392 | u32 bytes_recvd; | |
393 | u64 req_id; | |
394 | int ret; | |
395 | ||
396 | if (!info) | |
397 | return; | |
398 | ||
399 | par = info->par; | |
400 | recv_buf = (struct synthvid_msg *)par->recv_buf; | |
401 | ||
402 | do { | |
403 | ret = vmbus_recvpacket(hdev->channel, recv_buf, | |
404 | MAX_VMBUS_PKT_SIZE, | |
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); | |
410 | } | |
411 | ||
412 | /* Check synthetic video protocol version with the host */ | |
413 | static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver) | |
414 | { | |
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; | |
418 | int t, ret = 0; | |
419 | ||
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); | |
426 | ||
427 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); | |
428 | if (!t) { | |
429 | pr_err("Time out on waiting version response\n"); | |
430 | ret = -ETIMEDOUT; | |
431 | goto out; | |
432 | } | |
433 | if (!msg->ver_resp.is_accepted) { | |
434 | ret = -ENODEV; | |
435 | goto out; | |
436 | } | |
437 | ||
438 | par->synthvid_version = ver; | |
439 | ||
440 | out: | |
441 | return ret; | |
442 | } | |
443 | ||
444 | /* Connect to VSP (Virtual Service Provider) on host */ | |
445 | static int synthvid_connect_vsp(struct hv_device *hdev) | |
446 | { | |
447 | struct fb_info *info = hv_get_drvdata(hdev); | |
448 | struct hvfb_par *par = info->par; | |
449 | int ret; | |
450 | ||
451 | ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE, | |
452 | NULL, 0, synthvid_receive, hdev); | |
453 | if (ret) { | |
454 | pr_err("Unable to open vmbus channel\n"); | |
455 | return ret; | |
456 | } | |
457 | ||
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); | |
462 | else | |
463 | ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); | |
464 | ||
465 | if (ret) { | |
466 | pr_err("Synthetic video device version not accepted\n"); | |
467 | goto error; | |
468 | } | |
469 | ||
9069fd54 | 470 | if (par->synthvid_version == SYNTHVID_VERSION_WIN7) |
68a2d20b | 471 | screen_depth = SYNTHVID_DEPTH_WIN7; |
9069fd54 | 472 | else |
68a2d20b | 473 | screen_depth = SYNTHVID_DEPTH_WIN8; |
9069fd54 GH |
474 | |
475 | screen_fb_size = hdev->channel->offermsg.offer. | |
476 | mmio_megabytes * 1024 * 1024; | |
68a2d20b HZ |
477 | |
478 | return 0; | |
479 | ||
480 | error: | |
481 | vmbus_close(hdev->channel); | |
482 | return ret; | |
483 | } | |
484 | ||
485 | /* Send VRAM and Situation messages to the host */ | |
486 | static int synthvid_send_config(struct hv_device *hdev) | |
487 | { | |
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; | |
491 | int t, ret = 0; | |
492 | ||
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); | |
501 | ||
502 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); | |
503 | if (!t) { | |
504 | pr_err("Time out on waiting vram location ack\n"); | |
505 | ret = -ETIMEDOUT; | |
506 | goto out; | |
507 | } | |
508 | if (msg->vram_ack.user_ctx != info->fix.smem_start) { | |
509 | pr_err("Unable to set VRAM location\n"); | |
510 | ret = -ENODEV; | |
511 | goto out; | |
512 | } | |
513 | ||
514 | /* Send pointer and situation update */ | |
515 | synthvid_send_ptr(hdev); | |
516 | synthvid_send_situ(hdev); | |
517 | ||
518 | out: | |
519 | return ret; | |
520 | } | |
521 | ||
522 | ||
523 | /* | |
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. | |
527 | */ | |
528 | static void hvfb_update_work(struct work_struct *w) | |
529 | { | |
530 | struct hvfb_par *par = container_of(w, struct hvfb_par, dwork.work); | |
531 | struct fb_info *info = par->info; | |
532 | ||
533 | if (par->fb_ready) | |
534 | synthvid_update(info); | |
535 | ||
536 | if (par->update) | |
537 | schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); | |
538 | } | |
539 | ||
3686fe96 DC |
540 | static int hvfb_on_panic(struct notifier_block *nb, |
541 | unsigned long e, void *p) | |
542 | { | |
543 | struct hvfb_par *par; | |
544 | struct fb_info *info; | |
545 | ||
546 | par = container_of(nb, struct hvfb_par, hvfb_panic_nb); | |
547 | par->synchronous_fb = true; | |
548 | info = par->info; | |
549 | synthvid_update(info); | |
550 | ||
551 | return NOTIFY_DONE; | |
552 | } | |
68a2d20b HZ |
553 | |
554 | /* Framebuffer operation handlers */ | |
555 | ||
556 | static int hvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
557 | { | |
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) | |
561 | return -EINVAL; | |
562 | ||
563 | var->xres_virtual = var->xres; | |
564 | var->yres_virtual = var->yres; | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static int hvfb_set_par(struct fb_info *info) | |
570 | { | |
571 | struct hv_device *hdev = device_to_hv_device(info->device); | |
572 | ||
573 | return synthvid_send_situ(hdev); | |
574 | } | |
575 | ||
576 | ||
577 | static inline u32 chan_to_field(u32 chan, struct fb_bitfield *bf) | |
578 | { | |
579 | return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset; | |
580 | } | |
581 | ||
582 | static int hvfb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
583 | unsigned blue, unsigned transp, struct fb_info *info) | |
584 | { | |
585 | u32 *pal = info->pseudo_palette; | |
586 | ||
587 | if (regno > 15) | |
588 | return -EINVAL; | |
589 | ||
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); | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
9b5254b4 GH |
598 | static int hvfb_blank(int blank, struct fb_info *info) |
599 | { | |
600 | return 1; /* get fb_blank to set the colormap to all black */ | |
601 | } | |
68a2d20b | 602 | |
3686fe96 DC |
603 | static void hvfb_cfb_fillrect(struct fb_info *p, |
604 | const struct fb_fillrect *rect) | |
605 | { | |
606 | struct hvfb_par *par = p->par; | |
607 | ||
608 | cfb_fillrect(p, rect); | |
609 | if (par->synchronous_fb) | |
610 | synthvid_update(p); | |
611 | } | |
612 | ||
613 | static void hvfb_cfb_copyarea(struct fb_info *p, | |
614 | const struct fb_copyarea *area) | |
615 | { | |
616 | struct hvfb_par *par = p->par; | |
617 | ||
618 | cfb_copyarea(p, area); | |
619 | if (par->synchronous_fb) | |
620 | synthvid_update(p); | |
621 | } | |
622 | ||
623 | static void hvfb_cfb_imageblit(struct fb_info *p, | |
624 | const struct fb_image *image) | |
625 | { | |
626 | struct hvfb_par *par = p->par; | |
627 | ||
628 | cfb_imageblit(p, image); | |
629 | if (par->synchronous_fb) | |
630 | synthvid_update(p); | |
631 | } | |
632 | ||
68a2d20b HZ |
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, | |
3686fe96 DC |
638 | .fb_fillrect = hvfb_cfb_fillrect, |
639 | .fb_copyarea = hvfb_cfb_copyarea, | |
640 | .fb_imageblit = hvfb_cfb_imageblit, | |
9b5254b4 | 641 | .fb_blank = hvfb_blank, |
68a2d20b HZ |
642 | }; |
643 | ||
644 | ||
645 | /* Get options from kernel paramenter "video=" */ | |
646 | static void hvfb_get_option(struct fb_info *info) | |
647 | { | |
648 | struct hvfb_par *par = info->par; | |
649 | char *opt = NULL, *p; | |
650 | uint x = 0, y = 0; | |
651 | ||
652 | if (fb_get_options(KBUILD_MODNAME, &opt) || !opt || !*opt) | |
653 | return; | |
654 | ||
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"); | |
659 | return; | |
660 | } | |
661 | ||
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"); | |
668 | return; | |
669 | } | |
670 | ||
671 | screen_width = x; | |
672 | screen_height = y; | |
673 | return; | |
674 | } | |
675 | ||
676 | ||
677 | /* Get framebuffer memory from Hyper-V video pci space */ | |
678 | static int hvfb_getmem(struct fb_info *info) | |
679 | { | |
9069fd54 GH |
680 | struct hvfb_par *par = info->par; |
681 | struct pci_dev *pdev = NULL; | |
68a2d20b | 682 | void __iomem *fb_virt; |
9069fd54 GH |
683 | int gen2vm = efi_enabled(EFI_BOOT); |
684 | int ret; | |
68a2d20b | 685 | |
9069fd54 GH |
686 | par->mem.name = KBUILD_MODNAME; |
687 | par->mem.flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
688 | if (gen2vm) { | |
689 | ret = allocate_resource(&hyperv_mmio, &par->mem, | |
690 | screen_fb_size, | |
691 | 0, -1, | |
692 | screen_fb_size, | |
693 | NULL, NULL); | |
694 | if (ret != 0) { | |
695 | pr_err("Unable to allocate framebuffer memory\n"); | |
696 | return -ENODEV; | |
697 | } | |
698 | } else { | |
699 | pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, | |
68a2d20b | 700 | PCI_DEVICE_ID_HYPERV_VIDEO, NULL); |
9069fd54 GH |
701 | if (!pdev) { |
702 | pr_err("Unable to find PCI Hyper-V video\n"); | |
703 | return -ENODEV; | |
704 | } | |
68a2d20b | 705 | |
9069fd54 GH |
706 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || |
707 | pci_resource_len(pdev, 0) < screen_fb_size) | |
708 | goto err1; | |
68a2d20b | 709 | |
9069fd54 GH |
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); | |
713 | if (ret != 0) { | |
714 | pr_err("Unable to request framebuffer memory\n"); | |
715 | goto err1; | |
716 | } | |
717 | } | |
68a2d20b | 718 | |
9069fd54 | 719 | fb_virt = ioremap(par->mem.start, screen_fb_size); |
68a2d20b HZ |
720 | if (!fb_virt) |
721 | goto err2; | |
722 | ||
723 | info->apertures = alloc_apertures(1); | |
724 | if (!info->apertures) | |
725 | goto err3; | |
726 | ||
9069fd54 GH |
727 | if (gen2vm) { |
728 | info->apertures->ranges[0].base = screen_info.lfb_base; | |
729 | info->apertures->ranges[0].size = screen_info.lfb_size; | |
e5bb7425 GH |
730 | remove_conflicting_framebuffers(info->apertures, |
731 | KBUILD_MODNAME, false); | |
9069fd54 GH |
732 | } else { |
733 | info->apertures->ranges[0].base = pci_resource_start(pdev, 0); | |
734 | info->apertures->ranges[0].size = pci_resource_len(pdev, 0); | |
735 | } | |
736 | ||
737 | info->fix.smem_start = par->mem.start; | |
68a2d20b HZ |
738 | info->fix.smem_len = screen_fb_size; |
739 | info->screen_base = fb_virt; | |
740 | info->screen_size = screen_fb_size; | |
741 | ||
9069fd54 GH |
742 | if (!gen2vm) |
743 | pci_dev_put(pdev); | |
744 | ||
68a2d20b HZ |
745 | return 0; |
746 | ||
747 | err3: | |
748 | iounmap(fb_virt); | |
749 | err2: | |
9069fd54 | 750 | release_resource(&par->mem); |
68a2d20b | 751 | err1: |
9069fd54 GH |
752 | if (!gen2vm) |
753 | pci_dev_put(pdev); | |
754 | ||
68a2d20b HZ |
755 | return -ENOMEM; |
756 | } | |
757 | ||
758 | /* Release the framebuffer */ | |
759 | static void hvfb_putmem(struct fb_info *info) | |
760 | { | |
9069fd54 GH |
761 | struct hvfb_par *par = info->par; |
762 | ||
68a2d20b | 763 | iounmap(info->screen_base); |
9069fd54 | 764 | release_resource(&par->mem); |
68a2d20b HZ |
765 | } |
766 | ||
767 | ||
768 | static int hvfb_probe(struct hv_device *hdev, | |
769 | const struct hv_vmbus_device_id *dev_id) | |
770 | { | |
771 | struct fb_info *info; | |
772 | struct hvfb_par *par; | |
773 | int ret; | |
774 | ||
775 | info = framebuffer_alloc(sizeof(struct hvfb_par), &hdev->device); | |
776 | if (!info) { | |
777 | pr_err("No memory for framebuffer info\n"); | |
778 | return -ENOMEM; | |
779 | } | |
780 | ||
781 | par = info->par; | |
782 | par->info = info; | |
783 | par->fb_ready = false; | |
784 | init_completion(&par->wait); | |
785 | INIT_DELAYED_WORK(&par->dwork, hvfb_update_work); | |
786 | ||
787 | /* Connect to VSP */ | |
788 | hv_set_drvdata(hdev, info); | |
789 | ret = synthvid_connect_vsp(hdev); | |
790 | if (ret) { | |
791 | pr_err("Unable to connect to VSP\n"); | |
792 | goto error1; | |
793 | } | |
794 | ||
795 | ret = hvfb_getmem(info); | |
796 | if (ret) { | |
797 | pr_err("No memory for framebuffer\n"); | |
798 | goto error2; | |
799 | } | |
800 | ||
801 | hvfb_get_option(info); | |
802 | pr_info("Screen resolution: %dx%d, Color depth: %d\n", | |
803 | screen_width, screen_height, screen_depth); | |
804 | ||
805 | ||
806 | /* Set up fb_info */ | |
807 | info->flags = FBINFO_DEFAULT; | |
808 | ||
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; | |
812 | ||
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}; | |
818 | } else { | |
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}; | |
823 | } | |
824 | ||
825 | info->var.activate = FB_ACTIVATE_NOW; | |
826 | info->var.height = -1; | |
827 | info->var.width = -1; | |
828 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
829 | ||
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; | |
835 | ||
836 | info->fbops = &hvfb_ops; | |
837 | info->pseudo_palette = par->pseudo_palette; | |
838 | ||
839 | /* Send config to host */ | |
840 | ret = synthvid_send_config(hdev); | |
841 | if (ret) | |
842 | goto error; | |
843 | ||
844 | ret = register_framebuffer(info); | |
845 | if (ret) { | |
846 | pr_err("Unable to register framebuffer\n"); | |
847 | goto error; | |
848 | } | |
849 | ||
850 | par->fb_ready = true; | |
851 | ||
3686fe96 DC |
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); | |
856 | ||
68a2d20b HZ |
857 | return 0; |
858 | ||
859 | error: | |
860 | hvfb_putmem(info); | |
861 | error2: | |
862 | vmbus_close(hdev->channel); | |
863 | error1: | |
864 | cancel_delayed_work_sync(&par->dwork); | |
865 | hv_set_drvdata(hdev, NULL); | |
866 | framebuffer_release(info); | |
867 | return ret; | |
868 | } | |
869 | ||
870 | ||
871 | static int hvfb_remove(struct hv_device *hdev) | |
872 | { | |
873 | struct fb_info *info = hv_get_drvdata(hdev); | |
874 | struct hvfb_par *par = info->par; | |
875 | ||
3686fe96 DC |
876 | atomic_notifier_chain_unregister(&panic_notifier_list, |
877 | &par->hvfb_panic_nb); | |
878 | ||
68a2d20b HZ |
879 | par->update = false; |
880 | par->fb_ready = false; | |
881 | ||
882 | unregister_framebuffer(info); | |
883 | cancel_delayed_work_sync(&par->dwork); | |
884 | ||
885 | vmbus_close(hdev->channel); | |
886 | hv_set_drvdata(hdev, NULL); | |
887 | ||
888 | hvfb_putmem(info); | |
889 | framebuffer_release(info); | |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
894 | ||
9baa3c34 | 895 | static const struct pci_device_id pci_stub_id_table[] = { |
7ad96847 GH |
896 | { |
897 | .vendor = PCI_VENDOR_ID_MICROSOFT, | |
898 | .device = PCI_DEVICE_ID_HYPERV_VIDEO, | |
899 | }, | |
900 | { /* end of list */ } | |
901 | }; | |
902 | ||
68a2d20b HZ |
903 | static const struct hv_vmbus_device_id id_table[] = { |
904 | /* Synthetic Video Device GUID */ | |
905 | {HV_SYNTHVID_GUID}, | |
906 | {} | |
907 | }; | |
908 | ||
7ad96847 | 909 | MODULE_DEVICE_TABLE(pci, pci_stub_id_table); |
68a2d20b HZ |
910 | MODULE_DEVICE_TABLE(vmbus, id_table); |
911 | ||
912 | static struct hv_driver hvfb_drv = { | |
913 | .name = KBUILD_MODNAME, | |
914 | .id_table = id_table, | |
915 | .probe = hvfb_probe, | |
916 | .remove = hvfb_remove, | |
917 | }; | |
918 | ||
7ad96847 GH |
919 | static int hvfb_pci_stub_probe(struct pci_dev *pdev, |
920 | const struct pci_device_id *ent) | |
921 | { | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static void hvfb_pci_stub_remove(struct pci_dev *pdev) | |
926 | { | |
927 | } | |
928 | ||
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, | |
934 | }; | |
68a2d20b HZ |
935 | |
936 | static int __init hvfb_drv_init(void) | |
937 | { | |
7ad96847 GH |
938 | int ret; |
939 | ||
940 | ret = vmbus_driver_register(&hvfb_drv); | |
941 | if (ret != 0) | |
942 | return ret; | |
943 | ||
944 | ret = pci_register_driver(&hvfb_pci_stub_driver); | |
945 | if (ret != 0) { | |
946 | vmbus_driver_unregister(&hvfb_drv); | |
947 | return ret; | |
948 | } | |
949 | ||
950 | return 0; | |
68a2d20b HZ |
951 | } |
952 | ||
953 | static void __exit hvfb_drv_exit(void) | |
954 | { | |
7ad96847 | 955 | pci_unregister_driver(&hvfb_pci_stub_driver); |
68a2d20b HZ |
956 | vmbus_driver_unregister(&hvfb_drv); |
957 | } | |
958 | ||
959 | module_init(hvfb_drv_init); | |
960 | module_exit(hvfb_drv_exit); | |
961 | ||
962 | MODULE_LICENSE("GPL"); | |
68a2d20b | 963 | MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver"); |