projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 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> | |
| 45 | ||
| 46 | #include <linux/hyperv.h> | |
| 47 | ||
| 48 | ||
| 49 | /* Hyper-V Synthetic Video Protocol definitions and structures */ | |
| 50 | #define MAX_VMBUS_PKT_SIZE 0x4000 | |
| 51 | ||
| 52 | #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major)) | |
| 53 | #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) | |
| 54 | #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) | |
| 55 | ||
| 56 | #define SYNTHVID_DEPTH_WIN7 16 | |
| 57 | #define SYNTHVID_DEPTH_WIN8 32 | |
| 58 | ||
| 59 | #define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024) | |
| 60 | #define SYNTHVID_WIDTH_MAX_WIN7 1600 | |
| 61 | #define SYNTHVID_HEIGHT_MAX_WIN7 1200 | |
| 62 | ||
| 63 | #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) | |
| 64 | ||
| 65 | #define PCI_VENDOR_ID_MICROSOFT 0x1414 | |
| 66 | #define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353 | |
| 67 | ||
| 68 | ||
| 69 | enum pipe_msg_type { | |
| 70 | PIPE_MSG_INVALID, | |
| 71 | PIPE_MSG_DATA, | |
| 72 | PIPE_MSG_MAX | |
| 73 | }; | |
| 74 | ||
| 75 | struct pipe_msg_hdr { | |
| 76 | u32 type; | |
| 77 | u32 size; /* size of message after this field */ | |
| 78 | } __packed; | |
| 79 | ||
| 80 | ||
| 81 | enum synthvid_msg_type { | |
| 82 | SYNTHVID_ERROR = 0, | |
| 83 | SYNTHVID_VERSION_REQUEST = 1, | |
| 84 | SYNTHVID_VERSION_RESPONSE = 2, | |
| 85 | SYNTHVID_VRAM_LOCATION = 3, | |
| 86 | SYNTHVID_VRAM_LOCATION_ACK = 4, | |
| 87 | SYNTHVID_SITUATION_UPDATE = 5, | |
| 88 | SYNTHVID_SITUATION_UPDATE_ACK = 6, | |
| 89 | SYNTHVID_POINTER_POSITION = 7, | |
| 90 | SYNTHVID_POINTER_SHAPE = 8, | |
| 91 | SYNTHVID_FEATURE_CHANGE = 9, | |
| 92 | SYNTHVID_DIRT = 10, | |
| 93 | ||
| 94 | SYNTHVID_MAX = 11 | |
| 95 | }; | |
| 96 | ||
| 97 | struct synthvid_msg_hdr { | |
| 98 | u32 type; | |
| 99 | u32 size; /* size of this header + payload after this field*/ | |
| 100 | } __packed; | |
| 101 | ||
| 102 | ||
| 103 | struct synthvid_version_req { | |
| 104 | u32 version; | |
| 105 | } __packed; | |
| 106 | ||
| 107 | struct synthvid_version_resp { | |
| 108 | u32 version; | |
| 109 | u8 is_accepted; | |
| 110 | u8 max_video_outputs; | |
| 111 | } __packed; | |
| 112 | ||
| 113 | struct synthvid_vram_location { | |
| 114 | u64 user_ctx; | |
| 115 | u8 is_vram_gpa_specified; | |
| 116 | u64 vram_gpa; | |
| 117 | } __packed; | |
| 118 | ||
| 119 | struct synthvid_vram_location_ack { | |
| 120 | u64 user_ctx; | |
| 121 | } __packed; | |
| 122 | ||
| 123 | struct video_output_situation { | |
| 124 | u8 active; | |
| 125 | u32 vram_offset; | |
| 126 | u8 depth_bits; | |
| 127 | u32 width_pixels; | |
| 128 | u32 height_pixels; | |
| 129 | u32 pitch_bytes; | |
| 130 | } __packed; | |
| 131 | ||
| 132 | struct synthvid_situation_update { | |
| 133 | u64 user_ctx; | |
| 134 | u8 video_output_count; | |
| 135 | struct video_output_situation video_output[1]; | |
| 136 | } __packed; | |
| 137 | ||
| 138 | struct synthvid_situation_update_ack { | |
| 139 | u64 user_ctx; | |
| 140 | } __packed; | |
| 141 | ||
| 142 | struct synthvid_pointer_position { | |
| 143 | u8 is_visible; | |
| 144 | u8 video_output; | |
| 145 | s32 image_x; | |
| 146 | s32 image_y; | |
| 147 | } __packed; | |
| 148 | ||
| 149 | ||
| 150 | #define CURSOR_MAX_X 96 | |
| 151 | #define CURSOR_MAX_Y 96 | |
| 152 | #define CURSOR_ARGB_PIXEL_SIZE 4 | |
| 153 | #define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE) | |
| 154 | #define CURSOR_COMPLETE (-1) | |
| 155 | ||
| 156 | struct synthvid_pointer_shape { | |
| 157 | u8 part_idx; | |
| 158 | u8 is_argb; | |
| 159 | u32 width; /* CURSOR_MAX_X at most */ | |
| 160 | u32 height; /* CURSOR_MAX_Y at most */ | |
| 161 | u32 hot_x; /* hotspot relative to upper-left of pointer image */ | |
| 162 | u32 hot_y; | |
| 163 | u8 data[4]; | |
| 164 | } __packed; | |
| 165 | ||
| 166 | struct synthvid_feature_change { | |
| 167 | u8 is_dirt_needed; | |
| 168 | u8 is_ptr_pos_needed; | |
| 169 | u8 is_ptr_shape_needed; | |
| 170 | u8 is_situ_needed; | |
| 171 | } __packed; | |
| 172 | ||
| 173 | struct rect { | |
| 174 | s32 x1, y1; /* top left corner */ | |
| 175 | s32 x2, y2; /* bottom right corner, exclusive */ | |
| 176 | } __packed; | |
| 177 | ||
| 178 | struct synthvid_dirt { | |
| 179 | u8 video_output; | |
| 180 | u8 dirt_count; | |
| 181 | struct rect rect[1]; | |
| 182 | } __packed; | |
| 183 | ||
| 184 | struct synthvid_msg { | |
| 185 | struct pipe_msg_hdr pipe_hdr; | |
| 186 | struct synthvid_msg_hdr vid_hdr; | |
| 187 | union { | |
| 188 | struct synthvid_version_req ver_req; | |
| 189 | struct synthvid_version_resp ver_resp; | |
| 190 | struct synthvid_vram_location vram; | |
| 191 | struct synthvid_vram_location_ack vram_ack; | |
| 192 | struct synthvid_situation_update situ; | |
| 193 | struct synthvid_situation_update_ack situ_ack; | |
| 194 | struct synthvid_pointer_position ptr_pos; | |
| 195 | struct synthvid_pointer_shape ptr_shape; | |
| 196 | struct synthvid_feature_change feature_chg; | |
| 197 | struct synthvid_dirt dirt; | |
| 198 | }; | |
| 199 | } __packed; | |
| 200 | ||
| 201 | ||
| 202 | ||
| 203 | /* FB driver definitions and structures */ | |
| 204 | #define HVFB_WIDTH 1152 /* default screen width */ | |
| 205 | #define HVFB_HEIGHT 864 /* default screen height */ | |
| 206 | #define HVFB_WIDTH_MIN 640 | |
| 207 | #define HVFB_HEIGHT_MIN 480 | |
| 208 | ||
| 209 | #define RING_BUFSIZE (256 * 1024) | |
| 210 | #define VSP_TIMEOUT (10 * HZ) | |
| 211 | #define HVFB_UPDATE_DELAY (HZ / 20) | |
| 212 | ||
| 213 | struct hvfb_par { | |
| 214 | struct fb_info *info; | |
| 215 | bool fb_ready; /* fb device is ready */ | |
| 216 | struct completion wait; | |
| 217 | u32 synthvid_version; | |
| 218 | ||
| 219 | struct delayed_work dwork; | |
| 220 | bool update; | |
| 221 | ||
| 222 | u32 pseudo_palette[16]; | |
| 223 | u8 init_buf[MAX_VMBUS_PKT_SIZE]; | |
| 224 | u8 recv_buf[MAX_VMBUS_PKT_SIZE]; | |
| 225 | }; | |
| 226 | ||
| 227 | static uint screen_width = HVFB_WIDTH; | |
| 228 | static uint screen_height = HVFB_HEIGHT; | |
| 229 | static uint screen_depth; | |
| 230 | static uint screen_fb_size; | |
| 231 | ||
| 232 | /* Send message to Hyper-V host */ | |
| 233 | static inline int synthvid_send(struct hv_device *hdev, | |
| 234 | struct synthvid_msg *msg) | |
| 235 | { | |
| 236 | static atomic64_t request_id = ATOMIC64_INIT(0); | |
| 237 | int ret; | |
| 238 | ||
| 239 | msg->pipe_hdr.type = PIPE_MSG_DATA; | |
| 240 | msg->pipe_hdr.size = msg->vid_hdr.size; | |
| 241 | ||
| 242 | ret = vmbus_sendpacket(hdev->channel, msg, | |
| 243 | msg->vid_hdr.size + sizeof(struct pipe_msg_hdr), | |
| 244 | atomic64_inc_return(&request_id), | |
| 245 | VM_PKT_DATA_INBAND, 0); | |
| 246 | ||
| 247 | if (ret) | |
| 248 | pr_err("Unable to send packet via vmbus\n"); | |
| 249 | ||
| 250 | return ret; | |
| 251 | } | |
| 252 | ||
| 253 | ||
| 254 | /* Send screen resolution info to host */ | |
| 255 | static int synthvid_send_situ(struct hv_device *hdev) | |
| 256 | { | |
| 257 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 258 | struct synthvid_msg msg; | |
| 259 | ||
| 260 | if (!info) | |
| 261 | return -ENODEV; | |
| 262 | ||
| 263 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
| 264 | ||
| 265 | msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE; | |
| 266 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 267 | sizeof(struct synthvid_situation_update); | |
| 268 | msg.situ.user_ctx = 0; | |
| 269 | msg.situ.video_output_count = 1; | |
| 270 | msg.situ.video_output[0].active = 1; | |
| 271 | msg.situ.video_output[0].vram_offset = 0; | |
| 272 | msg.situ.video_output[0].depth_bits = info->var.bits_per_pixel; | |
| 273 | msg.situ.video_output[0].width_pixels = info->var.xres; | |
| 274 | msg.situ.video_output[0].height_pixels = info->var.yres; | |
| 275 | msg.situ.video_output[0].pitch_bytes = info->fix.line_length; | |
| 276 | ||
| 277 | synthvid_send(hdev, &msg); | |
| 278 | ||
| 279 | return 0; | |
| 280 | } | |
| 281 | ||
| 282 | /* Send mouse pointer info to host */ | |
| 283 | static int synthvid_send_ptr(struct hv_device *hdev) | |
| 284 | { | |
| 285 | struct synthvid_msg msg; | |
| 286 | ||
| 287 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
| 288 | msg.vid_hdr.type = SYNTHVID_POINTER_POSITION; | |
| 289 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 290 | sizeof(struct synthvid_pointer_position); | |
| 291 | msg.ptr_pos.is_visible = 1; | |
| 292 | msg.ptr_pos.video_output = 0; | |
| 293 | msg.ptr_pos.image_x = 0; | |
| 294 | msg.ptr_pos.image_y = 0; | |
| 295 | synthvid_send(hdev, &msg); | |
| 296 | ||
| 297 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
| 298 | msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE; | |
| 299 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 300 | sizeof(struct synthvid_pointer_shape); | |
| 301 | msg.ptr_shape.part_idx = CURSOR_COMPLETE; | |
| 302 | msg.ptr_shape.is_argb = 1; | |
| 303 | msg.ptr_shape.width = 1; | |
| 304 | msg.ptr_shape.height = 1; | |
| 305 | msg.ptr_shape.hot_x = 0; | |
| 306 | msg.ptr_shape.hot_y = 0; | |
| 307 | msg.ptr_shape.data[0] = 0; | |
| 308 | msg.ptr_shape.data[1] = 1; | |
| 309 | msg.ptr_shape.data[2] = 1; | |
| 310 | msg.ptr_shape.data[3] = 1; | |
| 311 | synthvid_send(hdev, &msg); | |
| 312 | ||
| 313 | return 0; | |
| 314 | } | |
| 315 | ||
| 316 | /* Send updated screen area (dirty rectangle) location to host */ | |
| 317 | static int synthvid_update(struct fb_info *info) | |
| 318 | { | |
| 319 | struct hv_device *hdev = device_to_hv_device(info->device); | |
| 320 | struct synthvid_msg msg; | |
| 321 | ||
| 322 | memset(&msg, 0, sizeof(struct synthvid_msg)); | |
| 323 | ||
| 324 | msg.vid_hdr.type = SYNTHVID_DIRT; | |
| 325 | msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 326 | sizeof(struct synthvid_dirt); | |
| 327 | msg.dirt.video_output = 0; | |
| 328 | msg.dirt.dirt_count = 1; | |
| 329 | msg.dirt.rect[0].x1 = 0; | |
| 330 | msg.dirt.rect[0].y1 = 0; | |
| 331 | msg.dirt.rect[0].x2 = info->var.xres; | |
| 332 | msg.dirt.rect[0].y2 = info->var.yres; | |
| 333 | ||
| 334 | synthvid_send(hdev, &msg); | |
| 335 | ||
| 336 | return 0; | |
| 337 | } | |
| 338 | ||
| 339 | ||
| 340 | /* | |
| 341 | * Actions on received messages from host: | |
| 342 | * Complete the wait event. | |
| 343 | * Or, reply with screen and cursor info. | |
| 344 | */ | |
| 345 | static void synthvid_recv_sub(struct hv_device *hdev) | |
| 346 | { | |
| 347 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 348 | struct hvfb_par *par; | |
| 349 | struct synthvid_msg *msg; | |
| 350 | ||
| 351 | if (!info) | |
| 352 | return; | |
| 353 | ||
| 354 | par = info->par; | |
| 355 | msg = (struct synthvid_msg *)par->recv_buf; | |
| 356 | ||
| 357 | /* Complete the wait event */ | |
| 358 | if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE || | |
| 359 | msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) { | |
| 360 | memcpy(par->init_buf, msg, MAX_VMBUS_PKT_SIZE); | |
| 361 | complete(&par->wait); | |
| 362 | return; | |
| 363 | } | |
| 364 | ||
| 365 | /* Reply with screen and cursor info */ | |
| 366 | if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { | |
| 367 | if (par->fb_ready) { | |
| 368 | synthvid_send_ptr(hdev); | |
| 369 | synthvid_send_situ(hdev); | |
| 370 | } | |
| 371 | ||
| 372 | par->update = msg->feature_chg.is_dirt_needed; | |
| 373 | if (par->update) | |
| 374 | schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); | |
| 375 | } | |
| 376 | } | |
| 377 | ||
| 378 | /* Receive callback for messages from the host */ | |
| 379 | static void synthvid_receive(void *ctx) | |
| 380 | { | |
| 381 | struct hv_device *hdev = ctx; | |
| 382 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 383 | struct hvfb_par *par; | |
| 384 | struct synthvid_msg *recv_buf; | |
| 385 | u32 bytes_recvd; | |
| 386 | u64 req_id; | |
| 387 | int ret; | |
| 388 | ||
| 389 | if (!info) | |
| 390 | return; | |
| 391 | ||
| 392 | par = info->par; | |
| 393 | recv_buf = (struct synthvid_msg *)par->recv_buf; | |
| 394 | ||
| 395 | do { | |
| 396 | ret = vmbus_recvpacket(hdev->channel, recv_buf, | |
| 397 | MAX_VMBUS_PKT_SIZE, | |
| 398 | &bytes_recvd, &req_id); | |
| 399 | if (bytes_recvd > 0 && | |
| 400 | recv_buf->pipe_hdr.type == PIPE_MSG_DATA) | |
| 401 | synthvid_recv_sub(hdev); | |
| 402 | } while (bytes_recvd > 0 && ret == 0); | |
| 403 | } | |
| 404 | ||
| 405 | /* Check synthetic video protocol version with the host */ | |
| 406 | static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver) | |
| 407 | { | |
| 408 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 409 | struct hvfb_par *par = info->par; | |
| 410 | struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf; | |
| 411 | int t, ret = 0; | |
| 412 | ||
| 413 | memset(msg, 0, sizeof(struct synthvid_msg)); | |
| 414 | msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST; | |
| 415 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 416 | sizeof(struct synthvid_version_req); | |
| 417 | msg->ver_req.version = ver; | |
| 418 | synthvid_send(hdev, msg); | |
| 419 | ||
| 420 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); | |
| 421 | if (!t) { | |
| 422 | pr_err("Time out on waiting version response\n"); | |
| 423 | ret = -ETIMEDOUT; | |
| 424 | goto out; | |
| 425 | } | |
| 426 | if (!msg->ver_resp.is_accepted) { | |
| 427 | ret = -ENODEV; | |
| 428 | goto out; | |
| 429 | } | |
| 430 | ||
| 431 | par->synthvid_version = ver; | |
| 432 | ||
| 433 | out: | |
| 434 | return ret; | |
| 435 | } | |
| 436 | ||
| 437 | /* Connect to VSP (Virtual Service Provider) on host */ | |
| 438 | static int synthvid_connect_vsp(struct hv_device *hdev) | |
| 439 | { | |
| 440 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 441 | struct hvfb_par *par = info->par; | |
| 442 | int ret; | |
| 443 | ||
| 444 | ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE, | |
| 445 | NULL, 0, synthvid_receive, hdev); | |
| 446 | if (ret) { | |
| 447 | pr_err("Unable to open vmbus channel\n"); | |
| 448 | return ret; | |
| 449 | } | |
| 450 | ||
| 451 | /* Negotiate the protocol version with host */ | |
| 452 | if (vmbus_proto_version == VERSION_WS2008 || | |
| 453 | vmbus_proto_version == VERSION_WIN7) | |
| 454 | ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7); | |
| 455 | else | |
| 456 | ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); | |
| 457 | ||
| 458 | if (ret) { | |
| 459 | pr_err("Synthetic video device version not accepted\n"); | |
| 460 | goto error; | |
| 461 | } | |
| 462 | ||
| 463 | if (par->synthvid_version == SYNTHVID_VERSION_WIN7) { | |
| 464 | screen_depth = SYNTHVID_DEPTH_WIN7; | |
| 465 | screen_fb_size = SYNTHVID_FB_SIZE_WIN7; | |
| 466 | } else { | |
| 467 | screen_depth = SYNTHVID_DEPTH_WIN8; | |
| 468 | screen_fb_size = SYNTHVID_FB_SIZE_WIN8; | |
| 469 | } | |
| 470 | ||
| 471 | return 0; | |
| 472 | ||
| 473 | error: | |
| 474 | vmbus_close(hdev->channel); | |
| 475 | return ret; | |
| 476 | } | |
| 477 | ||
| 478 | /* Send VRAM and Situation messages to the host */ | |
| 479 | static int synthvid_send_config(struct hv_device *hdev) | |
| 480 | { | |
| 481 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 482 | struct hvfb_par *par = info->par; | |
| 483 | struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf; | |
| 484 | int t, ret = 0; | |
| 485 | ||
| 486 | /* Send VRAM location */ | |
| 487 | memset(msg, 0, sizeof(struct synthvid_msg)); | |
| 488 | msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION; | |
| 489 | msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + | |
| 490 | sizeof(struct synthvid_vram_location); | |
| 491 | msg->vram.user_ctx = msg->vram.vram_gpa = info->fix.smem_start; | |
| 492 | msg->vram.is_vram_gpa_specified = 1; | |
| 493 | synthvid_send(hdev, msg); | |
| 494 | ||
| 495 | t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); | |
| 496 | if (!t) { | |
| 497 | pr_err("Time out on waiting vram location ack\n"); | |
| 498 | ret = -ETIMEDOUT; | |
| 499 | goto out; | |
| 500 | } | |
| 501 | if (msg->vram_ack.user_ctx != info->fix.smem_start) { | |
| 502 | pr_err("Unable to set VRAM location\n"); | |
| 503 | ret = -ENODEV; | |
| 504 | goto out; | |
| 505 | } | |
| 506 | ||
| 507 | /* Send pointer and situation update */ | |
| 508 | synthvid_send_ptr(hdev); | |
| 509 | synthvid_send_situ(hdev); | |
| 510 | ||
| 511 | out: | |
| 512 | return ret; | |
| 513 | } | |
| 514 | ||
| 515 | ||
| 516 | /* | |
| 517 | * Delayed work callback: | |
| 518 | * It is called at HVFB_UPDATE_DELAY or longer time interval to process | |
| 519 | * screen updates. It is re-scheduled if further update is necessary. | |
| 520 | */ | |
| 521 | static void hvfb_update_work(struct work_struct *w) | |
| 522 | { | |
| 523 | struct hvfb_par *par = container_of(w, struct hvfb_par, dwork.work); | |
| 524 | struct fb_info *info = par->info; | |
| 525 | ||
| 526 | if (par->fb_ready) | |
| 527 | synthvid_update(info); | |
| 528 | ||
| 529 | if (par->update) | |
| 530 | schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); | |
| 531 | } | |
| 532 | ||
| 533 | ||
| 534 | /* Framebuffer operation handlers */ | |
| 535 | ||
| 536 | static int hvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
| 537 | { | |
| 538 | if (var->xres < HVFB_WIDTH_MIN || var->yres < HVFB_HEIGHT_MIN || | |
| 539 | var->xres > screen_width || var->yres > screen_height || | |
| 540 | var->bits_per_pixel != screen_depth) | |
| 541 | return -EINVAL; | |
| 542 | ||
| 543 | var->xres_virtual = var->xres; | |
| 544 | var->yres_virtual = var->yres; | |
| 545 | ||
| 546 | return 0; | |
| 547 | } | |
| 548 | ||
| 549 | static int hvfb_set_par(struct fb_info *info) | |
| 550 | { | |
| 551 | struct hv_device *hdev = device_to_hv_device(info->device); | |
| 552 | ||
| 553 | return synthvid_send_situ(hdev); | |
| 554 | } | |
| 555 | ||
| 556 | ||
| 557 | static inline u32 chan_to_field(u32 chan, struct fb_bitfield *bf) | |
| 558 | { | |
| 559 | return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset; | |
| 560 | } | |
| 561 | ||
| 562 | static int hvfb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
| 563 | unsigned blue, unsigned transp, struct fb_info *info) | |
| 564 | { | |
| 565 | u32 *pal = info->pseudo_palette; | |
| 566 | ||
| 567 | if (regno > 15) | |
| 568 | return -EINVAL; | |
| 569 | ||
| 570 | pal[regno] = chan_to_field(red, &info->var.red) | |
| 571 | | chan_to_field(green, &info->var.green) | |
| 572 | | chan_to_field(blue, &info->var.blue) | |
| 573 | | chan_to_field(transp, &info->var.transp); | |
| 574 | ||
| 575 | return 0; | |
| 576 | } | |
| 577 | ||
| 578 | ||
| 579 | static struct fb_ops hvfb_ops = { | |
| 580 | .owner = THIS_MODULE, | |
| 581 | .fb_check_var = hvfb_check_var, | |
| 582 | .fb_set_par = hvfb_set_par, | |
| 583 | .fb_setcolreg = hvfb_setcolreg, | |
| 584 | .fb_fillrect = cfb_fillrect, | |
| 585 | .fb_copyarea = cfb_copyarea, | |
| 586 | .fb_imageblit = cfb_imageblit, | |
| 587 | }; | |
| 588 | ||
| 589 | ||
| 590 | /* Get options from kernel paramenter "video=" */ | |
| 591 | static void hvfb_get_option(struct fb_info *info) | |
| 592 | { | |
| 593 | struct hvfb_par *par = info->par; | |
| 594 | char *opt = NULL, *p; | |
| 595 | uint x = 0, y = 0; | |
| 596 | ||
| 597 | if (fb_get_options(KBUILD_MODNAME, &opt) || !opt || !*opt) | |
| 598 | return; | |
| 599 | ||
| 600 | p = strsep(&opt, "x"); | |
| 601 | if (!*p || kstrtouint(p, 0, &x) || | |
| 602 | !opt || !*opt || kstrtouint(opt, 0, &y)) { | |
| 603 | pr_err("Screen option is invalid: skipped\n"); | |
| 604 | return; | |
| 605 | } | |
| 606 | ||
| 607 | if (x < HVFB_WIDTH_MIN || y < HVFB_HEIGHT_MIN || | |
| 608 | (par->synthvid_version == SYNTHVID_VERSION_WIN8 && | |
| 609 | x * y * screen_depth / 8 > SYNTHVID_FB_SIZE_WIN8) || | |
| 610 | (par->synthvid_version == SYNTHVID_VERSION_WIN7 && | |
| 611 | (x > SYNTHVID_WIDTH_MAX_WIN7 || y > SYNTHVID_HEIGHT_MAX_WIN7))) { | |
| 612 | pr_err("Screen resolution option is out of range: skipped\n"); | |
| 613 | return; | |
| 614 | } | |
| 615 | ||
| 616 | screen_width = x; | |
| 617 | screen_height = y; | |
| 618 | return; | |
| 619 | } | |
| 620 | ||
| 621 | ||
| 622 | /* Get framebuffer memory from Hyper-V video pci space */ | |
| 623 | static int hvfb_getmem(struct fb_info *info) | |
| 624 | { | |
| 625 | struct pci_dev *pdev; | |
| 626 | ulong fb_phys; | |
| 627 | void __iomem *fb_virt; | |
| 628 | ||
| 629 | pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, | |
| 630 | PCI_DEVICE_ID_HYPERV_VIDEO, NULL); | |
| 631 | if (!pdev) { | |
| 632 | pr_err("Unable to find PCI Hyper-V video\n"); | |
| 633 | return -ENODEV; | |
| 634 | } | |
| 635 | ||
| 636 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || | |
| 637 | pci_resource_len(pdev, 0) < screen_fb_size) | |
| 638 | goto err1; | |
| 639 | ||
| 640 | fb_phys = pci_resource_end(pdev, 0) - screen_fb_size + 1; | |
| 641 | if (!request_mem_region(fb_phys, screen_fb_size, KBUILD_MODNAME)) | |
| 642 | goto err1; | |
| 643 | ||
| 644 | fb_virt = ioremap(fb_phys, screen_fb_size); | |
| 645 | if (!fb_virt) | |
| 646 | goto err2; | |
| 647 | ||
| 648 | info->apertures = alloc_apertures(1); | |
| 649 | if (!info->apertures) | |
| 650 | goto err3; | |
| 651 | ||
| 652 | info->apertures->ranges[0].base = pci_resource_start(pdev, 0); | |
| 653 | info->apertures->ranges[0].size = pci_resource_len(pdev, 0); | |
| 654 | info->fix.smem_start = fb_phys; | |
| 655 | info->fix.smem_len = screen_fb_size; | |
| 656 | info->screen_base = fb_virt; | |
| 657 | info->screen_size = screen_fb_size; | |
| 658 | ||
| 659 | pci_dev_put(pdev); | |
| 660 | return 0; | |
| 661 | ||
| 662 | err3: | |
| 663 | iounmap(fb_virt); | |
| 664 | err2: | |
| 665 | release_mem_region(fb_phys, screen_fb_size); | |
| 666 | err1: | |
| 667 | pci_dev_put(pdev); | |
| 668 | return -ENOMEM; | |
| 669 | } | |
| 670 | ||
| 671 | /* Release the framebuffer */ | |
| 672 | static void hvfb_putmem(struct fb_info *info) | |
| 673 | { | |
| 674 | iounmap(info->screen_base); | |
| 675 | release_mem_region(info->fix.smem_start, screen_fb_size); | |
| 676 | } | |
| 677 | ||
| 678 | ||
| 679 | static int hvfb_probe(struct hv_device *hdev, | |
| 680 | const struct hv_vmbus_device_id *dev_id) | |
| 681 | { | |
| 682 | struct fb_info *info; | |
| 683 | struct hvfb_par *par; | |
| 684 | int ret; | |
| 685 | ||
| 686 | info = framebuffer_alloc(sizeof(struct hvfb_par), &hdev->device); | |
| 687 | if (!info) { | |
| 688 | pr_err("No memory for framebuffer info\n"); | |
| 689 | return -ENOMEM; | |
| 690 | } | |
| 691 | ||
| 692 | par = info->par; | |
| 693 | par->info = info; | |
| 694 | par->fb_ready = false; | |
| 695 | init_completion(&par->wait); | |
| 696 | INIT_DELAYED_WORK(&par->dwork, hvfb_update_work); | |
| 697 | ||
| 698 | /* Connect to VSP */ | |
| 699 | hv_set_drvdata(hdev, info); | |
| 700 | ret = synthvid_connect_vsp(hdev); | |
| 701 | if (ret) { | |
| 702 | pr_err("Unable to connect to VSP\n"); | |
| 703 | goto error1; | |
| 704 | } | |
| 705 | ||
| 706 | ret = hvfb_getmem(info); | |
| 707 | if (ret) { | |
| 708 | pr_err("No memory for framebuffer\n"); | |
| 709 | goto error2; | |
| 710 | } | |
| 711 | ||
| 712 | hvfb_get_option(info); | |
| 713 | pr_info("Screen resolution: %dx%d, Color depth: %d\n", | |
| 714 | screen_width, screen_height, screen_depth); | |
| 715 | ||
| 716 | ||
| 717 | /* Set up fb_info */ | |
| 718 | info->flags = FBINFO_DEFAULT; | |
| 719 | ||
| 720 | info->var.xres_virtual = info->var.xres = screen_width; | |
| 721 | info->var.yres_virtual = info->var.yres = screen_height; | |
| 722 | info->var.bits_per_pixel = screen_depth; | |
| 723 | ||
| 724 | if (info->var.bits_per_pixel == 16) { | |
| 725 | info->var.red = (struct fb_bitfield){11, 5, 0}; | |
| 726 | info->var.green = (struct fb_bitfield){5, 6, 0}; | |
| 727 | info->var.blue = (struct fb_bitfield){0, 5, 0}; | |
| 728 | info->var.transp = (struct fb_bitfield){0, 0, 0}; | |
| 729 | } else { | |
| 730 | info->var.red = (struct fb_bitfield){16, 8, 0}; | |
| 731 | info->var.green = (struct fb_bitfield){8, 8, 0}; | |
| 732 | info->var.blue = (struct fb_bitfield){0, 8, 0}; | |
| 733 | info->var.transp = (struct fb_bitfield){24, 8, 0}; | |
| 734 | } | |
| 735 | ||
| 736 | info->var.activate = FB_ACTIVATE_NOW; | |
| 737 | info->var.height = -1; | |
| 738 | info->var.width = -1; | |
| 739 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
| 740 | ||
| 741 | strcpy(info->fix.id, KBUILD_MODNAME); | |
| 742 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
| 743 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
| 744 | info->fix.line_length = screen_width * screen_depth / 8; | |
| 745 | info->fix.accel = FB_ACCEL_NONE; | |
| 746 | ||
| 747 | info->fbops = &hvfb_ops; | |
| 748 | info->pseudo_palette = par->pseudo_palette; | |
| 749 | ||
| 750 | /* Send config to host */ | |
| 751 | ret = synthvid_send_config(hdev); | |
| 752 | if (ret) | |
| 753 | goto error; | |
| 754 | ||
| 755 | ret = register_framebuffer(info); | |
| 756 | if (ret) { | |
| 757 | pr_err("Unable to register framebuffer\n"); | |
| 758 | goto error; | |
| 759 | } | |
| 760 | ||
| 761 | par->fb_ready = true; | |
| 762 | ||
| 763 | return 0; | |
| 764 | ||
| 765 | error: | |
| 766 | hvfb_putmem(info); | |
| 767 | error2: | |
| 768 | vmbus_close(hdev->channel); | |
| 769 | error1: | |
| 770 | cancel_delayed_work_sync(&par->dwork); | |
| 771 | hv_set_drvdata(hdev, NULL); | |
| 772 | framebuffer_release(info); | |
| 773 | return ret; | |
| 774 | } | |
| 775 | ||
| 776 | ||
| 777 | static int hvfb_remove(struct hv_device *hdev) | |
| 778 | { | |
| 779 | struct fb_info *info = hv_get_drvdata(hdev); | |
| 780 | struct hvfb_par *par = info->par; | |
| 781 | ||
| 782 | par->update = false; | |
| 783 | par->fb_ready = false; | |
| 784 | ||
| 785 | unregister_framebuffer(info); | |
| 786 | cancel_delayed_work_sync(&par->dwork); | |
| 787 | ||
| 788 | vmbus_close(hdev->channel); | |
| 789 | hv_set_drvdata(hdev, NULL); | |
| 790 | ||
| 791 | hvfb_putmem(info); | |
| 792 | framebuffer_release(info); | |
| 793 | ||
| 794 | return 0; | |
| 795 | } | |
| 796 | ||
| 797 | ||
| 41bb9b0e GH |
798 | static DEFINE_PCI_DEVICE_TABLE(pci_stub_id_table) = { |
| 799 | { | |
| 800 | .vendor = PCI_VENDOR_ID_MICROSOFT, | |
| 801 | .device = PCI_DEVICE_ID_HYPERV_VIDEO, | |
| 802 | }, | |
| 803 | { /* end of list */ } | |
| 804 | }; | |
| 805 | ||
| 68a2d20b HZ |
806 | static const struct hv_vmbus_device_id id_table[] = { |
| 807 | /* Synthetic Video Device GUID */ | |
| 808 | {HV_SYNTHVID_GUID}, | |
| 809 | {} | |
| 810 | }; | |
| 811 | ||
| 41bb9b0e | 812 | MODULE_DEVICE_TABLE(pci, pci_stub_id_table); |
| 68a2d20b HZ |
813 | MODULE_DEVICE_TABLE(vmbus, id_table); |
| 814 | ||
| 815 | static struct hv_driver hvfb_drv = { | |
| 816 | .name = KBUILD_MODNAME, | |
| 817 | .id_table = id_table, | |
| 818 | .probe = hvfb_probe, | |
| 819 | .remove = hvfb_remove, | |
| 820 | }; | |
| 821 | ||
| 41bb9b0e GH |
822 | static int hvfb_pci_stub_probe(struct pci_dev *pdev, |
| 823 | const struct pci_device_id *ent) | |
| 824 | { | |
| 825 | return 0; | |
| 826 | } | |
| 827 | ||
| 828 | static void hvfb_pci_stub_remove(struct pci_dev *pdev) | |
| 829 | { | |
| 830 | } | |
| 831 | ||
| 832 | static struct pci_driver hvfb_pci_stub_driver = { | |
| 833 | .name = KBUILD_MODNAME, | |
| 834 | .id_table = pci_stub_id_table, | |
| 835 | .probe = hvfb_pci_stub_probe, | |
| 836 | .remove = hvfb_pci_stub_remove, | |
| 837 | }; | |
| 68a2d20b HZ |
838 | |
| 839 | static int __init hvfb_drv_init(void) | |
| 840 | { | |
| 41bb9b0e GH |
841 | int ret; |
| 842 | ||
| 843 | ret = vmbus_driver_register(&hvfb_drv); | |
| 844 | if (ret != 0) | |
| 845 | return ret; | |
| 846 | ||
| 847 | ret = pci_register_driver(&hvfb_pci_stub_driver); | |
| 848 | if (ret != 0) { | |
| 849 | vmbus_driver_unregister(&hvfb_drv); | |
| 850 | return ret; | |
| 851 | } | |
| 852 | ||
| 853 | return 0; | |
| 68a2d20b HZ |
854 | } |
| 855 | ||
| 856 | static void __exit hvfb_drv_exit(void) | |
| 857 | { | |
| 41bb9b0e | 858 | pci_unregister_driver(&hvfb_pci_stub_driver); |
| 68a2d20b HZ |
859 | vmbus_driver_unregister(&hvfb_drv); |
| 860 | } | |
| 861 | ||
| 862 | module_init(hvfb_drv_init); | |
| 863 | module_exit(hvfb_drv_exit); | |
| 864 | ||
| 865 | MODULE_LICENSE("GPL"); | |
| 866 | MODULE_VERSION(HV_DRV_VERSION); | |
| 867 | MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver"); |