Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 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> |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 45 | #include <linux/efi.h> |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 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; |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 216 | struct resource *mem; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 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]; |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 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; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 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; |
Nicholas Mc Guire | 7dea97e | 2015-01-29 11:24:16 +0100 | [diff] [blame] | 418 | int ret = 0; |
| 419 | unsigned long t; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 420 | |
| 421 | memset(msg, 0, sizeof(struct synthvid_msg)); |
| 422 | msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST; |
| 423 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + |
| 424 | sizeof(struct synthvid_version_req); |
| 425 | msg->ver_req.version = ver; |
| 426 | synthvid_send(hdev, msg); |
| 427 | |
| 428 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); |
| 429 | if (!t) { |
| 430 | pr_err("Time out on waiting version response\n"); |
| 431 | ret = -ETIMEDOUT; |
| 432 | goto out; |
| 433 | } |
| 434 | if (!msg->ver_resp.is_accepted) { |
| 435 | ret = -ENODEV; |
| 436 | goto out; |
| 437 | } |
| 438 | |
| 439 | par->synthvid_version = ver; |
| 440 | |
| 441 | out: |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | /* Connect to VSP (Virtual Service Provider) on host */ |
| 446 | static int synthvid_connect_vsp(struct hv_device *hdev) |
| 447 | { |
| 448 | struct fb_info *info = hv_get_drvdata(hdev); |
| 449 | struct hvfb_par *par = info->par; |
| 450 | int ret; |
| 451 | |
| 452 | ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE, |
| 453 | NULL, 0, synthvid_receive, hdev); |
| 454 | if (ret) { |
| 455 | pr_err("Unable to open vmbus channel\n"); |
| 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | /* Negotiate the protocol version with host */ |
| 460 | if (vmbus_proto_version == VERSION_WS2008 || |
| 461 | vmbus_proto_version == VERSION_WIN7) |
| 462 | ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7); |
| 463 | else |
| 464 | ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); |
| 465 | |
| 466 | if (ret) { |
| 467 | pr_err("Synthetic video device version not accepted\n"); |
| 468 | goto error; |
| 469 | } |
| 470 | |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 471 | if (par->synthvid_version == SYNTHVID_VERSION_WIN7) |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 472 | screen_depth = SYNTHVID_DEPTH_WIN7; |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 473 | else |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 474 | screen_depth = SYNTHVID_DEPTH_WIN8; |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 475 | |
| 476 | screen_fb_size = hdev->channel->offermsg.offer. |
| 477 | mmio_megabytes * 1024 * 1024; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 478 | |
| 479 | return 0; |
| 480 | |
| 481 | error: |
| 482 | vmbus_close(hdev->channel); |
| 483 | return ret; |
| 484 | } |
| 485 | |
| 486 | /* Send VRAM and Situation messages to the host */ |
| 487 | static int synthvid_send_config(struct hv_device *hdev) |
| 488 | { |
| 489 | struct fb_info *info = hv_get_drvdata(hdev); |
| 490 | struct hvfb_par *par = info->par; |
| 491 | struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf; |
Nicholas Mc Guire | 7dea97e | 2015-01-29 11:24:16 +0100 | [diff] [blame] | 492 | int ret = 0; |
| 493 | unsigned long t; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 494 | |
| 495 | /* Send VRAM location */ |
| 496 | memset(msg, 0, sizeof(struct synthvid_msg)); |
| 497 | msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION; |
| 498 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + |
| 499 | sizeof(struct synthvid_vram_location); |
| 500 | msg->vram.user_ctx = msg->vram.vram_gpa = info->fix.smem_start; |
| 501 | msg->vram.is_vram_gpa_specified = 1; |
| 502 | synthvid_send(hdev, msg); |
| 503 | |
| 504 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); |
| 505 | if (!t) { |
| 506 | pr_err("Time out on waiting vram location ack\n"); |
| 507 | ret = -ETIMEDOUT; |
| 508 | goto out; |
| 509 | } |
| 510 | if (msg->vram_ack.user_ctx != info->fix.smem_start) { |
| 511 | pr_err("Unable to set VRAM location\n"); |
| 512 | ret = -ENODEV; |
| 513 | goto out; |
| 514 | } |
| 515 | |
| 516 | /* Send pointer and situation update */ |
| 517 | synthvid_send_ptr(hdev); |
| 518 | synthvid_send_situ(hdev); |
| 519 | |
| 520 | out: |
| 521 | return ret; |
| 522 | } |
| 523 | |
| 524 | |
| 525 | /* |
| 526 | * Delayed work callback: |
| 527 | * It is called at HVFB_UPDATE_DELAY or longer time interval to process |
| 528 | * screen updates. It is re-scheduled if further update is necessary. |
| 529 | */ |
| 530 | static void hvfb_update_work(struct work_struct *w) |
| 531 | { |
| 532 | struct hvfb_par *par = container_of(w, struct hvfb_par, dwork.work); |
| 533 | struct fb_info *info = par->info; |
| 534 | |
| 535 | if (par->fb_ready) |
| 536 | synthvid_update(info); |
| 537 | |
| 538 | if (par->update) |
| 539 | schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); |
| 540 | } |
| 541 | |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 542 | static int hvfb_on_panic(struct notifier_block *nb, |
| 543 | unsigned long e, void *p) |
| 544 | { |
| 545 | struct hvfb_par *par; |
| 546 | struct fb_info *info; |
| 547 | |
| 548 | par = container_of(nb, struct hvfb_par, hvfb_panic_nb); |
| 549 | par->synchronous_fb = true; |
| 550 | info = par->info; |
| 551 | synthvid_update(info); |
| 552 | |
| 553 | return NOTIFY_DONE; |
| 554 | } |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 555 | |
| 556 | /* Framebuffer operation handlers */ |
| 557 | |
| 558 | static int hvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
| 559 | { |
| 560 | if (var->xres < HVFB_WIDTH_MIN || var->yres < HVFB_HEIGHT_MIN || |
| 561 | var->xres > screen_width || var->yres > screen_height || |
| 562 | var->bits_per_pixel != screen_depth) |
| 563 | return -EINVAL; |
| 564 | |
| 565 | var->xres_virtual = var->xres; |
| 566 | var->yres_virtual = var->yres; |
| 567 | |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | static int hvfb_set_par(struct fb_info *info) |
| 572 | { |
| 573 | struct hv_device *hdev = device_to_hv_device(info->device); |
| 574 | |
| 575 | return synthvid_send_situ(hdev); |
| 576 | } |
| 577 | |
| 578 | |
| 579 | static inline u32 chan_to_field(u32 chan, struct fb_bitfield *bf) |
| 580 | { |
| 581 | return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset; |
| 582 | } |
| 583 | |
| 584 | static int hvfb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| 585 | unsigned blue, unsigned transp, struct fb_info *info) |
| 586 | { |
| 587 | u32 *pal = info->pseudo_palette; |
| 588 | |
| 589 | if (regno > 15) |
| 590 | return -EINVAL; |
| 591 | |
| 592 | pal[regno] = chan_to_field(red, &info->var.red) |
| 593 | | chan_to_field(green, &info->var.green) |
| 594 | | chan_to_field(blue, &info->var.blue) |
| 595 | | chan_to_field(transp, &info->var.transp); |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
Gerd Hoffmann | 9b5254b | 2013-10-02 13:55:11 +0200 | [diff] [blame] | 600 | static int hvfb_blank(int blank, struct fb_info *info) |
| 601 | { |
| 602 | return 1; /* get fb_blank to set the colormap to all black */ |
| 603 | } |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 604 | |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 605 | static void hvfb_cfb_fillrect(struct fb_info *p, |
| 606 | const struct fb_fillrect *rect) |
| 607 | { |
| 608 | struct hvfb_par *par = p->par; |
| 609 | |
| 610 | cfb_fillrect(p, rect); |
| 611 | if (par->synchronous_fb) |
| 612 | synthvid_update(p); |
| 613 | } |
| 614 | |
| 615 | static void hvfb_cfb_copyarea(struct fb_info *p, |
| 616 | const struct fb_copyarea *area) |
| 617 | { |
| 618 | struct hvfb_par *par = p->par; |
| 619 | |
| 620 | cfb_copyarea(p, area); |
| 621 | if (par->synchronous_fb) |
| 622 | synthvid_update(p); |
| 623 | } |
| 624 | |
| 625 | static void hvfb_cfb_imageblit(struct fb_info *p, |
| 626 | const struct fb_image *image) |
| 627 | { |
| 628 | struct hvfb_par *par = p->par; |
| 629 | |
| 630 | cfb_imageblit(p, image); |
| 631 | if (par->synchronous_fb) |
| 632 | synthvid_update(p); |
| 633 | } |
| 634 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 635 | static struct fb_ops hvfb_ops = { |
| 636 | .owner = THIS_MODULE, |
| 637 | .fb_check_var = hvfb_check_var, |
| 638 | .fb_set_par = hvfb_set_par, |
| 639 | .fb_setcolreg = hvfb_setcolreg, |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 640 | .fb_fillrect = hvfb_cfb_fillrect, |
| 641 | .fb_copyarea = hvfb_cfb_copyarea, |
| 642 | .fb_imageblit = hvfb_cfb_imageblit, |
Gerd Hoffmann | 9b5254b | 2013-10-02 13:55:11 +0200 | [diff] [blame] | 643 | .fb_blank = hvfb_blank, |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 644 | }; |
| 645 | |
| 646 | |
| 647 | /* Get options from kernel paramenter "video=" */ |
| 648 | static void hvfb_get_option(struct fb_info *info) |
| 649 | { |
| 650 | struct hvfb_par *par = info->par; |
| 651 | char *opt = NULL, *p; |
| 652 | uint x = 0, y = 0; |
| 653 | |
| 654 | if (fb_get_options(KBUILD_MODNAME, &opt) || !opt || !*opt) |
| 655 | return; |
| 656 | |
| 657 | p = strsep(&opt, "x"); |
| 658 | if (!*p || kstrtouint(p, 0, &x) || |
| 659 | !opt || !*opt || kstrtouint(opt, 0, &y)) { |
| 660 | pr_err("Screen option is invalid: skipped\n"); |
| 661 | return; |
| 662 | } |
| 663 | |
| 664 | if (x < HVFB_WIDTH_MIN || y < HVFB_HEIGHT_MIN || |
| 665 | (par->synthvid_version == SYNTHVID_VERSION_WIN8 && |
| 666 | x * y * screen_depth / 8 > SYNTHVID_FB_SIZE_WIN8) || |
| 667 | (par->synthvid_version == SYNTHVID_VERSION_WIN7 && |
| 668 | (x > SYNTHVID_WIDTH_MAX_WIN7 || y > SYNTHVID_HEIGHT_MAX_WIN7))) { |
| 669 | pr_err("Screen resolution option is out of range: skipped\n"); |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | screen_width = x; |
| 674 | screen_height = y; |
| 675 | return; |
| 676 | } |
| 677 | |
| 678 | |
| 679 | /* Get framebuffer memory from Hyper-V video pci space */ |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 680 | static int hvfb_getmem(struct hv_device *hdev, struct fb_info *info) |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 681 | { |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 682 | struct hvfb_par *par = info->par; |
| 683 | struct pci_dev *pdev = NULL; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 684 | void __iomem *fb_virt; |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 685 | int gen2vm = efi_enabled(EFI_BOOT); |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 686 | resource_size_t pot_start, pot_end; |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 687 | int ret; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 688 | |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 689 | if (gen2vm) { |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 690 | pot_start = 0; |
| 691 | pot_end = -1; |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 692 | } else { |
| 693 | pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 694 | PCI_DEVICE_ID_HYPERV_VIDEO, NULL); |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 695 | if (!pdev) { |
| 696 | pr_err("Unable to find PCI Hyper-V video\n"); |
| 697 | return -ENODEV; |
| 698 | } |
| 699 | |
| 700 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || |
| 701 | pci_resource_len(pdev, 0) < screen_fb_size) |
| 702 | goto err1; |
| 703 | |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 704 | pot_end = pci_resource_end(pdev, 0); |
| 705 | pot_start = pot_end - screen_fb_size + 1; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 706 | } |
| 707 | |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 708 | ret = vmbus_allocate_mmio(&par->mem, hdev, pot_start, pot_end, |
| 709 | screen_fb_size, 0x100000, true); |
| 710 | if (ret != 0) { |
| 711 | pr_err("Unable to allocate framebuffer memory\n"); |
| 712 | goto err1; |
| 713 | } |
| 714 | |
| 715 | fb_virt = ioremap(par->mem->start, screen_fb_size); |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 716 | if (!fb_virt) |
| 717 | goto err2; |
| 718 | |
| 719 | info->apertures = alloc_apertures(1); |
| 720 | if (!info->apertures) |
| 721 | goto err3; |
| 722 | |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 723 | if (gen2vm) { |
| 724 | info->apertures->ranges[0].base = screen_info.lfb_base; |
| 725 | info->apertures->ranges[0].size = screen_info.lfb_size; |
Gerd Hoffmann | e5bb7425 | 2014-02-26 11:51:25 +0100 | [diff] [blame] | 726 | remove_conflicting_framebuffers(info->apertures, |
| 727 | KBUILD_MODNAME, false); |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 728 | } else { |
| 729 | info->apertures->ranges[0].base = pci_resource_start(pdev, 0); |
| 730 | info->apertures->ranges[0].size = pci_resource_len(pdev, 0); |
| 731 | } |
| 732 | |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 733 | info->fix.smem_start = par->mem->start; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 734 | info->fix.smem_len = screen_fb_size; |
| 735 | info->screen_base = fb_virt; |
| 736 | info->screen_size = screen_fb_size; |
| 737 | |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 738 | if (!gen2vm) |
| 739 | pci_dev_put(pdev); |
| 740 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 741 | return 0; |
| 742 | |
| 743 | err3: |
| 744 | iounmap(fb_virt); |
| 745 | err2: |
Jake Oshins | 696ca5e | 2016-04-05 10:22:52 -0700 | [diff] [blame] | 746 | vmbus_free_mmio(par->mem->start, screen_fb_size); |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 747 | par->mem = NULL; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 748 | err1: |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 749 | if (!gen2vm) |
| 750 | pci_dev_put(pdev); |
| 751 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 752 | return -ENOMEM; |
| 753 | } |
| 754 | |
| 755 | /* Release the framebuffer */ |
| 756 | static void hvfb_putmem(struct fb_info *info) |
| 757 | { |
Gerd Hoffmann | 9069fd5 | 2014-02-26 11:51:24 +0100 | [diff] [blame] | 758 | struct hvfb_par *par = info->par; |
| 759 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 760 | iounmap(info->screen_base); |
Jake Oshins | 696ca5e | 2016-04-05 10:22:52 -0700 | [diff] [blame] | 761 | vmbus_free_mmio(par->mem->start, screen_fb_size); |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 762 | par->mem = NULL; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | |
| 766 | static int hvfb_probe(struct hv_device *hdev, |
| 767 | const struct hv_vmbus_device_id *dev_id) |
| 768 | { |
| 769 | struct fb_info *info; |
| 770 | struct hvfb_par *par; |
| 771 | int ret; |
| 772 | |
| 773 | info = framebuffer_alloc(sizeof(struct hvfb_par), &hdev->device); |
| 774 | if (!info) { |
| 775 | pr_err("No memory for framebuffer info\n"); |
| 776 | return -ENOMEM; |
| 777 | } |
| 778 | |
| 779 | par = info->par; |
| 780 | par->info = info; |
| 781 | par->fb_ready = false; |
| 782 | init_completion(&par->wait); |
| 783 | INIT_DELAYED_WORK(&par->dwork, hvfb_update_work); |
| 784 | |
| 785 | /* Connect to VSP */ |
| 786 | hv_set_drvdata(hdev, info); |
| 787 | ret = synthvid_connect_vsp(hdev); |
| 788 | if (ret) { |
| 789 | pr_err("Unable to connect to VSP\n"); |
| 790 | goto error1; |
| 791 | } |
| 792 | |
Jake Oshins | 3546448 | 2015-08-05 00:52:37 -0700 | [diff] [blame] | 793 | ret = hvfb_getmem(hdev, info); |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 794 | if (ret) { |
| 795 | pr_err("No memory for framebuffer\n"); |
| 796 | goto error2; |
| 797 | } |
| 798 | |
| 799 | hvfb_get_option(info); |
| 800 | pr_info("Screen resolution: %dx%d, Color depth: %d\n", |
| 801 | screen_width, screen_height, screen_depth); |
| 802 | |
| 803 | |
| 804 | /* Set up fb_info */ |
| 805 | info->flags = FBINFO_DEFAULT; |
| 806 | |
| 807 | info->var.xres_virtual = info->var.xres = screen_width; |
| 808 | info->var.yres_virtual = info->var.yres = screen_height; |
| 809 | info->var.bits_per_pixel = screen_depth; |
| 810 | |
| 811 | if (info->var.bits_per_pixel == 16) { |
| 812 | info->var.red = (struct fb_bitfield){11, 5, 0}; |
| 813 | info->var.green = (struct fb_bitfield){5, 6, 0}; |
| 814 | info->var.blue = (struct fb_bitfield){0, 5, 0}; |
| 815 | info->var.transp = (struct fb_bitfield){0, 0, 0}; |
| 816 | } else { |
| 817 | info->var.red = (struct fb_bitfield){16, 8, 0}; |
| 818 | info->var.green = (struct fb_bitfield){8, 8, 0}; |
| 819 | info->var.blue = (struct fb_bitfield){0, 8, 0}; |
| 820 | info->var.transp = (struct fb_bitfield){24, 8, 0}; |
| 821 | } |
| 822 | |
| 823 | info->var.activate = FB_ACTIVATE_NOW; |
| 824 | info->var.height = -1; |
| 825 | info->var.width = -1; |
| 826 | info->var.vmode = FB_VMODE_NONINTERLACED; |
| 827 | |
| 828 | strcpy(info->fix.id, KBUILD_MODNAME); |
| 829 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
| 830 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
| 831 | info->fix.line_length = screen_width * screen_depth / 8; |
| 832 | info->fix.accel = FB_ACCEL_NONE; |
| 833 | |
| 834 | info->fbops = &hvfb_ops; |
| 835 | info->pseudo_palette = par->pseudo_palette; |
| 836 | |
| 837 | /* Send config to host */ |
| 838 | ret = synthvid_send_config(hdev); |
| 839 | if (ret) |
| 840 | goto error; |
| 841 | |
| 842 | ret = register_framebuffer(info); |
| 843 | if (ret) { |
| 844 | pr_err("Unable to register framebuffer\n"); |
| 845 | goto error; |
| 846 | } |
| 847 | |
| 848 | par->fb_ready = true; |
| 849 | |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 850 | par->synchronous_fb = false; |
| 851 | par->hvfb_panic_nb.notifier_call = hvfb_on_panic; |
| 852 | atomic_notifier_chain_register(&panic_notifier_list, |
| 853 | &par->hvfb_panic_nb); |
| 854 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 855 | return 0; |
| 856 | |
| 857 | error: |
| 858 | hvfb_putmem(info); |
| 859 | error2: |
| 860 | vmbus_close(hdev->channel); |
| 861 | error1: |
| 862 | cancel_delayed_work_sync(&par->dwork); |
| 863 | hv_set_drvdata(hdev, NULL); |
| 864 | framebuffer_release(info); |
| 865 | return ret; |
| 866 | } |
| 867 | |
| 868 | |
| 869 | static int hvfb_remove(struct hv_device *hdev) |
| 870 | { |
| 871 | struct fb_info *info = hv_get_drvdata(hdev); |
| 872 | struct hvfb_par *par = info->par; |
| 873 | |
Dexuan Cui | 3686fe9 | 2014-08-01 04:27:54 -0700 | [diff] [blame] | 874 | atomic_notifier_chain_unregister(&panic_notifier_list, |
| 875 | &par->hvfb_panic_nb); |
| 876 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 877 | par->update = false; |
| 878 | par->fb_ready = false; |
| 879 | |
| 880 | unregister_framebuffer(info); |
| 881 | cancel_delayed_work_sync(&par->dwork); |
| 882 | |
| 883 | vmbus_close(hdev->channel); |
| 884 | hv_set_drvdata(hdev, NULL); |
| 885 | |
| 886 | hvfb_putmem(info); |
| 887 | framebuffer_release(info); |
| 888 | |
| 889 | return 0; |
| 890 | } |
| 891 | |
| 892 | |
Benoit Taine | 9baa3c3 | 2014-08-08 15:56:03 +0200 | [diff] [blame] | 893 | static const struct pci_device_id pci_stub_id_table[] = { |
Gerd Hoffmann | 7ad9684 | 2013-10-02 13:55:10 +0200 | [diff] [blame] | 894 | { |
| 895 | .vendor = PCI_VENDOR_ID_MICROSOFT, |
| 896 | .device = PCI_DEVICE_ID_HYPERV_VIDEO, |
| 897 | }, |
| 898 | { /* end of list */ } |
| 899 | }; |
| 900 | |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 901 | static const struct hv_vmbus_device_id id_table[] = { |
| 902 | /* Synthetic Video Device GUID */ |
| 903 | {HV_SYNTHVID_GUID}, |
| 904 | {} |
| 905 | }; |
| 906 | |
Gerd Hoffmann | 7ad9684 | 2013-10-02 13:55:10 +0200 | [diff] [blame] | 907 | MODULE_DEVICE_TABLE(pci, pci_stub_id_table); |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 908 | MODULE_DEVICE_TABLE(vmbus, id_table); |
| 909 | |
| 910 | static struct hv_driver hvfb_drv = { |
| 911 | .name = KBUILD_MODNAME, |
| 912 | .id_table = id_table, |
| 913 | .probe = hvfb_probe, |
| 914 | .remove = hvfb_remove, |
| 915 | }; |
| 916 | |
Gerd Hoffmann | 7ad9684 | 2013-10-02 13:55:10 +0200 | [diff] [blame] | 917 | static int hvfb_pci_stub_probe(struct pci_dev *pdev, |
| 918 | const struct pci_device_id *ent) |
| 919 | { |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | static void hvfb_pci_stub_remove(struct pci_dev *pdev) |
| 924 | { |
| 925 | } |
| 926 | |
| 927 | static struct pci_driver hvfb_pci_stub_driver = { |
| 928 | .name = KBUILD_MODNAME, |
| 929 | .id_table = pci_stub_id_table, |
| 930 | .probe = hvfb_pci_stub_probe, |
| 931 | .remove = hvfb_pci_stub_remove, |
| 932 | }; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 933 | |
| 934 | static int __init hvfb_drv_init(void) |
| 935 | { |
Gerd Hoffmann | 7ad9684 | 2013-10-02 13:55:10 +0200 | [diff] [blame] | 936 | int ret; |
| 937 | |
| 938 | ret = vmbus_driver_register(&hvfb_drv); |
| 939 | if (ret != 0) |
| 940 | return ret; |
| 941 | |
| 942 | ret = pci_register_driver(&hvfb_pci_stub_driver); |
| 943 | if (ret != 0) { |
| 944 | vmbus_driver_unregister(&hvfb_drv); |
| 945 | return ret; |
| 946 | } |
| 947 | |
| 948 | return 0; |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | static void __exit hvfb_drv_exit(void) |
| 952 | { |
Gerd Hoffmann | 7ad9684 | 2013-10-02 13:55:10 +0200 | [diff] [blame] | 953 | pci_unregister_driver(&hvfb_pci_stub_driver); |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 954 | vmbus_driver_unregister(&hvfb_drv); |
| 955 | } |
| 956 | |
| 957 | module_init(hvfb_drv_init); |
| 958 | module_exit(hvfb_drv_exit); |
| 959 | |
| 960 | MODULE_LICENSE("GPL"); |
Haiyang Zhang | 68a2d20b | 2013-04-29 15:05:42 -0700 | [diff] [blame] | 961 | MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver"); |