1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright 2018-2020 Broadcom. 4 */ 5 6 #ifndef BCM_VK_H 7 #define BCM_VK_H 8 9 #include <linux/atomic.h> 10 #include <linux/firmware.h> 11 #include <linux/irq.h> 12 #include <linux/kref.h> 13 #include <linux/miscdevice.h> 14 #include <linux/mutex.h> 15 #include <linux/pci.h> 16 #include <linux/poll.h> 17 #include <linux/sched/signal.h> 18 #include <linux/tty.h> 19 #include <linux/uaccess.h> 20 #include <uapi/linux/misc/bcm_vk.h> 21 22 #include "bcm_vk_msg.h" 23 24 #define DRV_MODULE_NAME "bcm-vk" 25 26 /* 27 * Load Image is completed in two stages: 28 * 29 * 1) When the VK device boot-up, M7 CPU runs and executes the BootROM. 30 * The Secure Boot Loader (SBL) as part of the BootROM will run 31 * to open up ITCM for host to push BOOT1 image. 32 * SBL will authenticate the image before jumping to BOOT1 image. 33 * 34 * 2) Because BOOT1 image is a secured image, we also called it the 35 * Secure Boot Image (SBI). At second stage, SBI will initialize DDR 36 * and wait for host to push BOOT2 image to DDR. 37 * SBI will authenticate the image before jumping to BOOT2 image. 38 * 39 */ 40 /* Location of registers of interest in BAR0 */ 41 42 /* Request register for Secure Boot Loader (SBL) download */ 43 #define BAR_CODEPUSH_SBL 0x400 44 /* Start of ITCM */ 45 #define CODEPUSH_BOOT1_ENTRY 0x00400000 46 #define CODEPUSH_MASK 0xfffff000 47 #define CODEPUSH_BOOTSTART BIT(0) 48 49 /* Boot Status register */ 50 #define BAR_BOOT_STATUS 0x404 51 52 #define SRAM_OPEN BIT(16) 53 #define DDR_OPEN BIT(17) 54 55 /* Firmware loader progress status definitions */ 56 #define FW_LOADER_ACK_SEND_MORE_DATA BIT(18) 57 #define FW_LOADER_ACK_IN_PROGRESS BIT(19) 58 #define FW_LOADER_ACK_RCVD_ALL_DATA BIT(20) 59 60 /* Boot1/2 is running in standalone mode */ 61 #define BOOT_STDALONE_RUNNING BIT(21) 62 63 /* definitions for boot status register */ 64 #define BOOT_STATE_MASK (0xffffffff & \ 65 ~(FW_LOADER_ACK_SEND_MORE_DATA | \ 66 FW_LOADER_ACK_IN_PROGRESS | \ 67 BOOT_STDALONE_RUNNING)) 68 69 #define BOOT_ERR_SHIFT 4 70 #define BOOT_ERR_MASK (0xf << BOOT_ERR_SHIFT) 71 #define BOOT_PROG_MASK 0xf 72 73 #define BROM_STATUS_NOT_RUN 0x2 74 #define BROM_NOT_RUN (SRAM_OPEN | BROM_STATUS_NOT_RUN) 75 #define BROM_STATUS_COMPLETE 0x6 76 #define BROM_RUNNING (SRAM_OPEN | BROM_STATUS_COMPLETE) 77 #define BOOT1_STATUS_COMPLETE 0x6 78 #define BOOT1_RUNNING (DDR_OPEN | BOOT1_STATUS_COMPLETE) 79 #define BOOT2_STATUS_COMPLETE 0x6 80 #define BOOT2_RUNNING (FW_LOADER_ACK_RCVD_ALL_DATA | \ 81 BOOT2_STATUS_COMPLETE) 82 83 /* Boot request for Secure Boot Image (SBI) */ 84 #define BAR_CODEPUSH_SBI 0x408 85 /* 64M mapped to BAR2 */ 86 #define CODEPUSH_BOOT2_ENTRY 0x60000000 87 88 #define BAR_CARD_STATUS 0x410 89 /* CARD_STATUS definitions */ 90 #define CARD_STATUS_TTYVK0_READY BIT(0) 91 #define CARD_STATUS_TTYVK1_READY BIT(1) 92 93 #define BAR_BOOT1_STDALONE_PROGRESS 0x420 94 #define BOOT1_STDALONE_SUCCESS (BIT(13) | BIT(14)) 95 #define BOOT1_STDALONE_PROGRESS_MASK BOOT1_STDALONE_SUCCESS 96 97 #define BAR_METADATA_VERSION 0x440 98 #define BAR_OS_UPTIME 0x444 99 #define BAR_CHIP_ID 0x448 100 #define MAJOR_SOC_REV(_chip_id) (((_chip_id) >> 20) & 0xf) 101 102 #define BAR_CARD_TEMPERATURE 0x45c 103 /* defines for all temperature sensor */ 104 #define BCM_VK_TEMP_FIELD_MASK 0xff 105 #define BCM_VK_CPU_TEMP_SHIFT 0 106 #define BCM_VK_DDR0_TEMP_SHIFT 8 107 #define BCM_VK_DDR1_TEMP_SHIFT 16 108 109 #define BAR_CARD_VOLTAGE 0x460 110 /* defines for voltage rail conversion */ 111 #define BCM_VK_VOLT_RAIL_MASK 0xffff 112 #define BCM_VK_3P3_VOLT_REG_SHIFT 16 113 114 #define BAR_CARD_ERR_LOG 0x464 115 /* Error log register bit definition - register for error alerts */ 116 #define ERR_LOG_UECC BIT(0) 117 #define ERR_LOG_SSIM_BUSY BIT(1) 118 #define ERR_LOG_AFBC_BUSY BIT(2) 119 #define ERR_LOG_HIGH_TEMP_ERR BIT(3) 120 #define ERR_LOG_WDOG_TIMEOUT BIT(4) 121 #define ERR_LOG_SYS_FAULT BIT(5) 122 #define ERR_LOG_RAMDUMP BIT(6) 123 #define ERR_LOG_COP_WDOG_TIMEOUT BIT(7) 124 /* warnings */ 125 #define ERR_LOG_MEM_ALLOC_FAIL BIT(8) 126 #define ERR_LOG_LOW_TEMP_WARN BIT(9) 127 #define ERR_LOG_ECC BIT(10) 128 #define ERR_LOG_IPC_DWN BIT(11) 129 130 /* Alert bit definitions detectd on host */ 131 #define ERR_LOG_HOST_INTF_V_FAIL BIT(13) 132 #define ERR_LOG_HOST_HB_FAIL BIT(14) 133 #define ERR_LOG_HOST_PCIE_DWN BIT(15) 134 135 #define BAR_CARD_ERR_MEM 0x468 136 /* defines for mem err, all fields have same width */ 137 #define BCM_VK_MEM_ERR_FIELD_MASK 0xff 138 #define BCM_VK_ECC_MEM_ERR_SHIFT 0 139 #define BCM_VK_UECC_MEM_ERR_SHIFT 8 140 /* threshold of event occurrence and logs start to come out */ 141 #define BCM_VK_ECC_THRESHOLD 10 142 #define BCM_VK_UECC_THRESHOLD 1 143 144 #define BAR_CARD_PWR_AND_THRE 0x46c 145 /* defines for power and temp threshold, all fields have same width */ 146 #define BCM_VK_PWR_AND_THRE_FIELD_MASK 0xff 147 #define BCM_VK_LOW_TEMP_THRE_SHIFT 0 148 #define BCM_VK_HIGH_TEMP_THRE_SHIFT 8 149 #define BCM_VK_PWR_STATE_SHIFT 16 150 151 #define BAR_CARD_STATIC_INFO 0x470 152 153 #define BAR_INTF_VER 0x47c 154 #define BAR_INTF_VER_MAJOR_SHIFT 16 155 #define BAR_INTF_VER_MASK 0xffff 156 /* 157 * major and minor semantic version numbers supported 158 * Please update as required on interface changes 159 */ 160 #define SEMANTIC_MAJOR 1 161 #define SEMANTIC_MINOR 0 162 163 /* 164 * first door bell reg, ie for queue = 0. Only need the first one, as 165 * we will use the queue number to derive the others 166 */ 167 #define VK_BAR0_REGSEG_DB_BASE 0x484 168 #define VK_BAR0_REGSEG_DB_REG_GAP 8 /* 169 * DB register gap, 170 * DB1 at 0x48c and DB2 at 0x494 171 */ 172 173 /* reset register and specific values */ 174 #define VK_BAR0_RESET_DB_NUM 3 175 #define VK_BAR0_RESET_DB_SOFT 0xffffffff 176 #define VK_BAR0_RESET_DB_HARD 0xfffffffd 177 #define VK_BAR0_RESET_RAMPDUMP 0xa0000000 178 179 #define VK_BAR0_Q_DB_BASE(q_num) (VK_BAR0_REGSEG_DB_BASE + \ 180 ((q_num) * VK_BAR0_REGSEG_DB_REG_GAP)) 181 #define VK_BAR0_RESET_DB_BASE (VK_BAR0_REGSEG_DB_BASE + \ 182 (VK_BAR0_RESET_DB_NUM * VK_BAR0_REGSEG_DB_REG_GAP)) 183 184 #define BAR_BOOTSRC_SELECT 0xc78 185 /* BOOTSRC definitions */ 186 #define BOOTSRC_SOFT_ENABLE BIT(14) 187 188 /* Card OS Firmware version size */ 189 #define BAR_FIRMWARE_TAG_SIZE 50 190 #define FIRMWARE_STATUS_PRE_INIT_DONE 0x1f 191 192 /* VK MSG_ID defines */ 193 #define VK_MSG_ID_BITMAP_SIZE 4096 194 #define VK_MSG_ID_BITMAP_MASK (VK_MSG_ID_BITMAP_SIZE - 1) 195 #define VK_MSG_ID_OVERFLOW 0xffff 196 197 /* 198 * BAR1 199 */ 200 201 /* BAR1 message q definition */ 202 203 /* indicate if msgq ctrl in BAR1 is populated */ 204 #define VK_BAR1_MSGQ_DEF_RDY 0x60c0 205 /* ready marker value for the above location, normal boot2 */ 206 #define VK_BAR1_MSGQ_RDY_MARKER 0xbeefcafe 207 /* ready marker value for the above location, normal boot2 */ 208 #define VK_BAR1_DIAG_RDY_MARKER 0xdeadcafe 209 /* number of msgqs in BAR1 */ 210 #define VK_BAR1_MSGQ_NR 0x60c4 211 /* BAR1 queue control structure offset */ 212 #define VK_BAR1_MSGQ_CTRL_OFF 0x60c8 213 214 /* BAR1 ucode and boot1 version tag */ 215 #define VK_BAR1_UCODE_VER_TAG 0x6170 216 #define VK_BAR1_BOOT1_VER_TAG 0x61b0 217 #define VK_BAR1_VER_TAG_SIZE 64 218 219 /* Memory to hold the DMA buffer memory address allocated for boot2 download */ 220 #define VK_BAR1_DMA_BUF_OFF_HI 0x61e0 221 #define VK_BAR1_DMA_BUF_OFF_LO (VK_BAR1_DMA_BUF_OFF_HI + 4) 222 #define VK_BAR1_DMA_BUF_SZ (VK_BAR1_DMA_BUF_OFF_HI + 8) 223 224 /* Scratch memory allocated on host for VK */ 225 #define VK_BAR1_SCRATCH_OFF_HI 0x61f0 226 #define VK_BAR1_SCRATCH_OFF_LO (VK_BAR1_SCRATCH_OFF_HI + 4) 227 #define VK_BAR1_SCRATCH_SZ_ADDR (VK_BAR1_SCRATCH_OFF_HI + 8) 228 #define VK_BAR1_SCRATCH_DEF_NR_PAGES 32 229 230 /* BAR1 DAUTH info */ 231 #define VK_BAR1_DAUTH_BASE_ADDR 0x6200 232 #define VK_BAR1_DAUTH_STORE_SIZE 0x48 233 #define VK_BAR1_DAUTH_VALID_SIZE 0x8 234 #define VK_BAR1_DAUTH_MAX 4 235 #define VK_BAR1_DAUTH_STORE_ADDR(x) \ 236 (VK_BAR1_DAUTH_BASE_ADDR + \ 237 (x) * (VK_BAR1_DAUTH_STORE_SIZE + VK_BAR1_DAUTH_VALID_SIZE)) 238 #define VK_BAR1_DAUTH_VALID_ADDR(x) \ 239 (VK_BAR1_DAUTH_STORE_ADDR(x) + VK_BAR1_DAUTH_STORE_SIZE) 240 241 /* BAR1 SOTP AUTH and REVID info */ 242 #define VK_BAR1_SOTP_REVID_BASE_ADDR 0x6340 243 #define VK_BAR1_SOTP_REVID_SIZE 0x10 244 #define VK_BAR1_SOTP_REVID_MAX 2 245 #define VK_BAR1_SOTP_REVID_ADDR(x) \ 246 (VK_BAR1_SOTP_REVID_BASE_ADDR + (x) * VK_BAR1_SOTP_REVID_SIZE) 247 248 /* VK device supports a maximum of 3 bars */ 249 #define MAX_BAR 3 250 251 /* default number of msg blk for inband SGL */ 252 #define BCM_VK_DEF_IB_SGL_BLK_LEN 16 253 #define BCM_VK_IB_SGL_BLK_MAX 24 254 255 enum pci_barno { 256 BAR_0 = 0, 257 BAR_1, 258 BAR_2 259 }; 260 261 #ifdef CONFIG_BCM_VK_TTY 262 #define BCM_VK_NUM_TTY 2 263 #else 264 #define BCM_VK_NUM_TTY 0 265 #endif 266 267 struct bcm_vk_tty { 268 struct tty_port port; 269 u32 to_offset; /* bar offset to use */ 270 u32 to_size; /* to VK buffer size */ 271 u32 wr; /* write offset shadow */ 272 u32 from_offset; /* bar offset to use */ 273 u32 from_size; /* from VK buffer size */ 274 u32 rd; /* read offset shadow */ 275 pid_t pid; 276 bool irq_enabled; 277 bool is_opened; /* tracks tty open/close */ 278 }; 279 280 /* VK device max power state, supports 3, full, reduced and low */ 281 #define MAX_OPP 3 282 #define MAX_CARD_INFO_TAG_SIZE 64 283 284 struct bcm_vk_card_info { 285 u32 version; 286 char os_tag[MAX_CARD_INFO_TAG_SIZE]; 287 char cmpt_tag[MAX_CARD_INFO_TAG_SIZE]; 288 u32 cpu_freq_mhz; 289 u32 cpu_scale[MAX_OPP]; 290 u32 ddr_freq_mhz; 291 u32 ddr_size_MB; 292 u32 video_core_freq_mhz; 293 }; 294 295 /* DAUTH related info */ 296 struct bcm_vk_dauth_key { 297 char store[VK_BAR1_DAUTH_STORE_SIZE]; 298 char valid[VK_BAR1_DAUTH_VALID_SIZE]; 299 }; 300 301 struct bcm_vk_dauth_info { 302 struct bcm_vk_dauth_key keys[VK_BAR1_DAUTH_MAX]; 303 }; 304 305 /* 306 * Control structure of logging messages from the card. This 307 * buffer is for logmsg that comes from vk 308 */ 309 struct bcm_vk_peer_log { 310 u32 rd_idx; 311 u32 wr_idx; 312 u32 buf_size; 313 u32 mask; 314 char data[0]; 315 }; 316 317 /* max buf size allowed */ 318 #define BCM_VK_PEER_LOG_BUF_MAX SZ_16K 319 /* max size per line of peer log */ 320 #define BCM_VK_PEER_LOG_LINE_MAX 256 321 322 /* 323 * single entry for processing type + utilization 324 */ 325 #define BCM_VK_PROC_TYPE_TAG_LEN 8 326 struct bcm_vk_proc_mon_entry_t { 327 char tag[BCM_VK_PROC_TYPE_TAG_LEN]; 328 u32 used; 329 u32 max; /**< max capacity */ 330 }; 331 332 /** 333 * Structure for run time utilization 334 */ 335 #define BCM_VK_PROC_MON_MAX 8 /* max entries supported */ 336 struct bcm_vk_proc_mon_info { 337 u32 num; /**< no of entries */ 338 u32 entry_size; /**< per entry size */ 339 struct bcm_vk_proc_mon_entry_t entries[BCM_VK_PROC_MON_MAX]; 340 }; 341 342 struct bcm_vk_hb_ctrl { 343 struct timer_list timer; 344 u32 last_uptime; 345 u32 lost_cnt; 346 }; 347 348 struct bcm_vk_alert { 349 u16 flags; 350 u16 notfs; 351 }; 352 353 /* some alert counters that the driver will keep track */ 354 struct bcm_vk_alert_cnts { 355 u16 ecc; 356 u16 uecc; 357 }; 358 359 struct bcm_vk { 360 struct pci_dev *pdev; 361 void __iomem *bar[MAX_BAR]; 362 int num_irqs; 363 364 struct bcm_vk_card_info card_info; 365 struct bcm_vk_proc_mon_info proc_mon_info; 366 struct bcm_vk_dauth_info dauth_info; 367 368 /* mutex to protect the ioctls */ 369 struct mutex mutex; 370 struct miscdevice miscdev; 371 int devid; /* dev id allocated */ 372 373 #ifdef CONFIG_BCM_VK_TTY 374 struct tty_driver *tty_drv; 375 struct timer_list serial_timer; 376 struct bcm_vk_tty tty[BCM_VK_NUM_TTY]; 377 struct workqueue_struct *tty_wq_thread; 378 struct work_struct tty_wq_work; 379 #endif 380 381 /* Reference-counting to handle file operations */ 382 struct kref kref; 383 384 spinlock_t msg_id_lock; /* Spinlock for msg_id */ 385 u16 msg_id; 386 DECLARE_BITMAP(bmap, VK_MSG_ID_BITMAP_SIZE); 387 spinlock_t ctx_lock; /* Spinlock for component context */ 388 struct bcm_vk_ctx ctx[VK_CMPT_CTX_MAX]; 389 struct bcm_vk_ht_entry pid_ht[VK_PID_HT_SZ]; 390 pid_t reset_pid; /* process that issue reset */ 391 392 atomic_t msgq_inited; /* indicate if info has been synced with vk */ 393 struct bcm_vk_msg_chan to_v_msg_chan; 394 struct bcm_vk_msg_chan to_h_msg_chan; 395 396 struct workqueue_struct *wq_thread; 397 struct work_struct wq_work; /* work queue for deferred job */ 398 unsigned long wq_offload[1]; /* various flags on wq requested */ 399 void *tdma_vaddr; /* test dma segment virtual addr */ 400 dma_addr_t tdma_addr; /* test dma segment bus addr */ 401 402 struct notifier_block panic_nb; 403 u32 ib_sgl_size; /* size allocated for inband sgl insertion */ 404 405 /* heart beat mechanism control structure */ 406 struct bcm_vk_hb_ctrl hb_ctrl; 407 /* house-keeping variable of error logs */ 408 spinlock_t host_alert_lock; /* protection to access host_alert struct */ 409 struct bcm_vk_alert host_alert; 410 struct bcm_vk_alert peer_alert; /* bits set by the card */ 411 struct bcm_vk_alert_cnts alert_cnts; 412 413 /* offset of the peer log control in BAR2 */ 414 u32 peerlog_off; 415 struct bcm_vk_peer_log peerlog_info; /* record of peer log info */ 416 /* offset of processing monitoring info in BAR2 */ 417 u32 proc_mon_off; 418 }; 419 420 /* wq offload work items bits definitions */ 421 enum bcm_vk_wq_offload_flags { 422 BCM_VK_WQ_DWNLD_PEND = 0, 423 BCM_VK_WQ_DWNLD_AUTO = 1, 424 BCM_VK_WQ_NOTF_PEND = 2, 425 }; 426 427 /* a macro to get an individual field with mask and shift */ 428 #define BCM_VK_EXTRACT_FIELD(_field, _reg, _mask, _shift) \ 429 (_field = (((_reg) >> (_shift)) & (_mask))) 430 431 struct bcm_vk_entry { 432 const u32 mask; 433 const u32 exp_val; 434 const char *str; 435 }; 436 437 /* alerts that could be generated from peer */ 438 #define BCM_VK_PEER_ERR_NUM 12 439 extern struct bcm_vk_entry const bcm_vk_peer_err[BCM_VK_PEER_ERR_NUM]; 440 /* alerts detected by the host */ 441 #define BCM_VK_HOST_ERR_NUM 3 442 extern struct bcm_vk_entry const bcm_vk_host_err[BCM_VK_HOST_ERR_NUM]; 443 444 /* 445 * check if PCIe interface is down on read. Use it when it is 446 * certain that _val should never be all ones. 447 */ 448 #define BCM_VK_INTF_IS_DOWN(val) ((val) == 0xffffffff) 449 450 static inline u32 vkread32(struct bcm_vk *vk, enum pci_barno bar, u64 offset) 451 { 452 return readl(vk->bar[bar] + offset); 453 } 454 455 static inline void vkwrite32(struct bcm_vk *vk, 456 u32 value, 457 enum pci_barno bar, 458 u64 offset) 459 { 460 writel(value, vk->bar[bar] + offset); 461 } 462 463 static inline u8 vkread8(struct bcm_vk *vk, enum pci_barno bar, u64 offset) 464 { 465 return readb(vk->bar[bar] + offset); 466 } 467 468 static inline void vkwrite8(struct bcm_vk *vk, 469 u8 value, 470 enum pci_barno bar, 471 u64 offset) 472 { 473 writeb(value, vk->bar[bar] + offset); 474 } 475 476 static inline bool bcm_vk_msgq_marker_valid(struct bcm_vk *vk) 477 { 478 u32 rdy_marker = 0; 479 u32 fw_status; 480 481 fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS); 482 483 if ((fw_status & VK_FWSTS_READY) == VK_FWSTS_READY) 484 rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY); 485 486 return (rdy_marker == VK_BAR1_MSGQ_RDY_MARKER); 487 } 488 489 int bcm_vk_open(struct inode *inode, struct file *p_file); 490 ssize_t bcm_vk_read(struct file *p_file, char __user *buf, size_t count, 491 loff_t *f_pos); 492 ssize_t bcm_vk_write(struct file *p_file, const char __user *buf, 493 size_t count, loff_t *f_pos); 494 __poll_t bcm_vk_poll(struct file *p_file, struct poll_table_struct *wait); 495 int bcm_vk_release(struct inode *inode, struct file *p_file); 496 void bcm_vk_release_data(struct kref *kref); 497 irqreturn_t bcm_vk_msgq_irqhandler(int irq, void *dev_id); 498 irqreturn_t bcm_vk_notf_irqhandler(int irq, void *dev_id); 499 irqreturn_t bcm_vk_tty_irqhandler(int irq, void *dev_id); 500 int bcm_vk_msg_init(struct bcm_vk *vk); 501 void bcm_vk_msg_remove(struct bcm_vk *vk); 502 void bcm_vk_drain_msg_on_reset(struct bcm_vk *vk); 503 int bcm_vk_sync_msgq(struct bcm_vk *vk, bool force_sync); 504 void bcm_vk_blk_drv_access(struct bcm_vk *vk); 505 s32 bcm_to_h_msg_dequeue(struct bcm_vk *vk); 506 int bcm_vk_send_shutdown_msg(struct bcm_vk *vk, u32 shut_type, 507 const pid_t pid, const u32 q_num); 508 void bcm_to_v_q_doorbell(struct bcm_vk *vk, u32 q_num, u32 db_val); 509 int bcm_vk_auto_load_all_images(struct bcm_vk *vk); 510 void bcm_vk_hb_init(struct bcm_vk *vk); 511 void bcm_vk_hb_deinit(struct bcm_vk *vk); 512 void bcm_vk_handle_notf(struct bcm_vk *vk); 513 bool bcm_vk_drv_access_ok(struct bcm_vk *vk); 514 void bcm_vk_set_host_alert(struct bcm_vk *vk, u32 bit_mask); 515 516 #ifdef CONFIG_BCM_VK_TTY 517 int bcm_vk_tty_init(struct bcm_vk *vk, char *name); 518 void bcm_vk_tty_exit(struct bcm_vk *vk); 519 void bcm_vk_tty_terminate_tty_user(struct bcm_vk *vk); 520 void bcm_vk_tty_wq_exit(struct bcm_vk *vk); 521 522 static inline void bcm_vk_tty_set_irq_enabled(struct bcm_vk *vk, int index) 523 { 524 vk->tty[index].irq_enabled = true; 525 } 526 #else 527 static inline int bcm_vk_tty_init(struct bcm_vk *vk, char *name) 528 { 529 return 0; 530 } 531 532 static inline void bcm_vk_tty_exit(struct bcm_vk *vk) 533 { 534 } 535 536 static inline void bcm_vk_tty_terminate_tty_user(struct bcm_vk *vk) 537 { 538 } 539 540 static inline void bcm_vk_tty_wq_exit(struct bcm_vk *vk) 541 { 542 } 543 544 static inline void bcm_vk_tty_set_irq_enabled(struct bcm_vk *vk, int index) 545 { 546 } 547 #endif /* CONFIG_BCM_VK_TTY */ 548 549 #endif 550