1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* 4 * xHCI host controller driver 5 * 6 * Copyright (C) 2008 Intel Corp. 7 * 8 * Author: Sarah Sharp 9 * Some code borrowed from the Linux EHCI driver. 10 */ 11 12 #ifndef __LINUX_XHCI_HCD_H 13 #define __LINUX_XHCI_HCD_H 14 15 #include <linux/usb.h> 16 #include <linux/timer.h> 17 #include <linux/kernel.h> 18 #include <linux/usb/hcd.h> 19 #include <linux/io-64-nonatomic-lo-hi.h> 20 21 /* Code sharing between pci-quirks and xhci hcd */ 22 #include "xhci-ext-caps.h" 23 #include "pci-quirks.h" 24 25 /* max buffer size for trace and debug messages */ 26 #define XHCI_MSG_MAX 500 27 28 /* xHCI PCI Configuration Registers */ 29 #define XHCI_SBRN_OFFSET (0x60) 30 31 /* Max number of USB devices for any host controller - limit in section 6.1 */ 32 #define MAX_HC_SLOTS 256 33 /* Section 5.3.3 - MaxPorts */ 34 #define MAX_HC_PORTS 127 35 36 /* 37 * xHCI register interface. 38 * This corresponds to the eXtensible Host Controller Interface (xHCI) 39 * Revision 0.95 specification 40 */ 41 42 /** 43 * struct xhci_cap_regs - xHCI Host Controller Capability Registers. 44 * @hc_capbase: length of the capabilities register and HC version number 45 * @hcs_params1: HCSPARAMS1 - Structural Parameters 1 46 * @hcs_params2: HCSPARAMS2 - Structural Parameters 2 47 * @hcs_params3: HCSPARAMS3 - Structural Parameters 3 48 * @hcc_params: HCCPARAMS - Capability Parameters 49 * @db_off: DBOFF - Doorbell array offset 50 * @run_regs_off: RTSOFF - Runtime register space offset 51 * @hcc_params2: HCCPARAMS2 Capability Parameters 2, xhci 1.1 only 52 */ 53 struct xhci_cap_regs { 54 __le32 hc_capbase; 55 __le32 hcs_params1; 56 __le32 hcs_params2; 57 __le32 hcs_params3; 58 __le32 hcc_params; 59 __le32 db_off; 60 __le32 run_regs_off; 61 __le32 hcc_params2; /* xhci 1.1 */ 62 /* Reserved up to (CAPLENGTH - 0x1C) */ 63 }; 64 65 /* hc_capbase bitmasks */ 66 /* bits 7:0 - how long is the Capabilities register */ 67 #define HC_LENGTH(p) XHCI_HC_LENGTH(p) 68 /* bits 31:16 */ 69 #define HC_VERSION(p) (((p) >> 16) & 0xffff) 70 71 /* HCSPARAMS1 - hcs_params1 - bitmasks */ 72 /* bits 0:7, Max Device Slots */ 73 #define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff) 74 #define HCS_SLOTS_MASK 0xff 75 /* bits 8:18, Max Interrupters */ 76 #define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff) 77 /* bits 24:31, Max Ports - max value is 0x7F = 127 ports */ 78 #define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f) 79 80 /* HCSPARAMS2 - hcs_params2 - bitmasks */ 81 /* bits 0:3, frames or uframes that SW needs to queue transactions 82 * ahead of the HW to meet periodic deadlines */ 83 #define HCS_IST(p) (((p) >> 0) & 0xf) 84 /* bits 4:7, max number of Event Ring segments */ 85 #define HCS_ERST_MAX(p) (((p) >> 4) & 0xf) 86 /* bits 21:25 Hi 5 bits of Scratchpad buffers SW must allocate for the HW */ 87 /* bit 26 Scratchpad restore - for save/restore HW state - not used yet */ 88 /* bits 27:31 Lo 5 bits of Scratchpad buffers SW must allocate for the HW */ 89 #define HCS_MAX_SCRATCHPAD(p) ((((p) >> 16) & 0x3e0) | (((p) >> 27) & 0x1f)) 90 91 /* HCSPARAMS3 - hcs_params3 - bitmasks */ 92 /* bits 0:7, Max U1 to U0 latency for the roothub ports */ 93 #define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff) 94 /* bits 16:31, Max U2 to U0 latency for the roothub ports */ 95 #define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff) 96 97 /* HCCPARAMS - hcc_params - bitmasks */ 98 /* true: HC can use 64-bit address pointers */ 99 #define HCC_64BIT_ADDR(p) ((p) & (1 << 0)) 100 /* true: HC can do bandwidth negotiation */ 101 #define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1)) 102 /* true: HC uses 64-byte Device Context structures 103 * FIXME 64-byte context structures aren't supported yet. 104 */ 105 #define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2)) 106 /* true: HC has port power switches */ 107 #define HCC_PPC(p) ((p) & (1 << 3)) 108 /* true: HC has port indicators */ 109 #define HCS_INDICATOR(p) ((p) & (1 << 4)) 110 /* true: HC has Light HC Reset Capability */ 111 #define HCC_LIGHT_RESET(p) ((p) & (1 << 5)) 112 /* true: HC supports latency tolerance messaging */ 113 #define HCC_LTC(p) ((p) & (1 << 6)) 114 /* true: no secondary Stream ID Support */ 115 #define HCC_NSS(p) ((p) & (1 << 7)) 116 /* true: HC supports Stopped - Short Packet */ 117 #define HCC_SPC(p) ((p) & (1 << 9)) 118 /* true: HC has Contiguous Frame ID Capability */ 119 #define HCC_CFC(p) ((p) & (1 << 11)) 120 /* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */ 121 #define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1)) 122 /* Extended Capabilities pointer from PCI base - section 5.3.6 */ 123 #define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p) 124 125 #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32) 126 127 /* db_off bitmask - bits 0:1 reserved */ 128 #define DBOFF_MASK (~0x3) 129 130 /* run_regs_off bitmask - bits 0:4 reserved */ 131 #define RTSOFF_MASK (~0x1f) 132 133 /* HCCPARAMS2 - hcc_params2 - bitmasks */ 134 /* true: HC supports U3 entry Capability */ 135 #define HCC2_U3C(p) ((p) & (1 << 0)) 136 /* true: HC supports Configure endpoint command Max exit latency too large */ 137 #define HCC2_CMC(p) ((p) & (1 << 1)) 138 /* true: HC supports Force Save context Capability */ 139 #define HCC2_FSC(p) ((p) & (1 << 2)) 140 /* true: HC supports Compliance Transition Capability */ 141 #define HCC2_CTC(p) ((p) & (1 << 3)) 142 /* true: HC support Large ESIT payload Capability > 48k */ 143 #define HCC2_LEC(p) ((p) & (1 << 4)) 144 /* true: HC support Configuration Information Capability */ 145 #define HCC2_CIC(p) ((p) & (1 << 5)) 146 /* true: HC support Extended TBC Capability, Isoc burst count > 65535 */ 147 #define HCC2_ETC(p) ((p) & (1 << 6)) 148 149 /* Number of registers per port */ 150 #define NUM_PORT_REGS 4 151 152 #define PORTSC 0 153 #define PORTPMSC 1 154 #define PORTLI 2 155 #define PORTHLPMC 3 156 157 /** 158 * struct xhci_op_regs - xHCI Host Controller Operational Registers. 159 * @command: USBCMD - xHC command register 160 * @status: USBSTS - xHC status register 161 * @page_size: This indicates the page size that the host controller 162 * supports. If bit n is set, the HC supports a page size 163 * of 2^(n+12), up to a 128MB page size. 164 * 4K is the minimum page size. 165 * @cmd_ring: CRP - 64-bit Command Ring Pointer 166 * @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer 167 * @config_reg: CONFIG - Configure Register 168 * @port_status_base: PORTSCn - base address for Port Status and Control 169 * Each port has a Port Status and Control register, 170 * followed by a Port Power Management Status and Control 171 * register, a Port Link Info register, and a reserved 172 * register. 173 * @port_power_base: PORTPMSCn - base address for 174 * Port Power Management Status and Control 175 * @port_link_base: PORTLIn - base address for Port Link Info (current 176 * Link PM state and control) for USB 2.1 and USB 3.0 177 * devices. 178 */ 179 struct xhci_op_regs { 180 __le32 command; 181 __le32 status; 182 __le32 page_size; 183 __le32 reserved1; 184 __le32 reserved2; 185 __le32 dev_notification; 186 __le64 cmd_ring; 187 /* rsvd: offset 0x20-2F */ 188 __le32 reserved3[4]; 189 __le64 dcbaa_ptr; 190 __le32 config_reg; 191 /* rsvd: offset 0x3C-3FF */ 192 __le32 reserved4[241]; 193 /* port 1 registers, which serve as a base address for other ports */ 194 __le32 port_status_base; 195 __le32 port_power_base; 196 __le32 port_link_base; 197 __le32 reserved5; 198 /* registers for ports 2-255 */ 199 __le32 reserved6[NUM_PORT_REGS*254]; 200 }; 201 202 /* USBCMD - USB command - command bitmasks */ 203 /* start/stop HC execution - do not write unless HC is halted*/ 204 #define CMD_RUN XHCI_CMD_RUN 205 /* Reset HC - resets internal HC state machine and all registers (except 206 * PCI config regs). HC does NOT drive a USB reset on the downstream ports. 207 * The xHCI driver must reinitialize the xHC after setting this bit. 208 */ 209 #define CMD_RESET (1 << 1) 210 /* Event Interrupt Enable - a '1' allows interrupts from the host controller */ 211 #define CMD_EIE XHCI_CMD_EIE 212 /* Host System Error Interrupt Enable - get out-of-band signal for HC errors */ 213 #define CMD_HSEIE XHCI_CMD_HSEIE 214 /* bits 4:6 are reserved (and should be preserved on writes). */ 215 /* light reset (port status stays unchanged) - reset completed when this is 0 */ 216 #define CMD_LRESET (1 << 7) 217 /* host controller save/restore state. */ 218 #define CMD_CSS (1 << 8) 219 #define CMD_CRS (1 << 9) 220 /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ 221 #define CMD_EWE XHCI_CMD_EWE 222 /* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root 223 * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off. 224 * '0' means the xHC can power it off if all ports are in the disconnect, 225 * disabled, or powered-off state. 226 */ 227 #define CMD_PM_INDEX (1 << 11) 228 /* bit 14 Extended TBC Enable, changes Isoc TRB fields to support larger TBC */ 229 #define CMD_ETE (1 << 14) 230 /* bits 15:31 are reserved (and should be preserved on writes). */ 231 232 /* IMAN - Interrupt Management Register */ 233 #define IMAN_IE (1 << 1) 234 #define IMAN_IP (1 << 0) 235 236 /* USBSTS - USB status - status bitmasks */ 237 /* HC not running - set to 1 when run/stop bit is cleared. */ 238 #define STS_HALT XHCI_STS_HALT 239 /* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */ 240 #define STS_FATAL (1 << 2) 241 /* event interrupt - clear this prior to clearing any IP flags in IR set*/ 242 #define STS_EINT (1 << 3) 243 /* port change detect */ 244 #define STS_PORT (1 << 4) 245 /* bits 5:7 reserved and zeroed */ 246 /* save state status - '1' means xHC is saving state */ 247 #define STS_SAVE (1 << 8) 248 /* restore state status - '1' means xHC is restoring state */ 249 #define STS_RESTORE (1 << 9) 250 /* true: save or restore error */ 251 #define STS_SRE (1 << 10) 252 /* true: Controller Not Ready to accept doorbell or op reg writes after reset */ 253 #define STS_CNR XHCI_STS_CNR 254 /* true: internal Host Controller Error - SW needs to reset and reinitialize */ 255 #define STS_HCE (1 << 12) 256 /* bits 13:31 reserved and should be preserved */ 257 258 /* 259 * DNCTRL - Device Notification Control Register - dev_notification bitmasks 260 * Generate a device notification event when the HC sees a transaction with a 261 * notification type that matches a bit set in this bit field. 262 */ 263 #define DEV_NOTE_MASK (0xffff) 264 #define ENABLE_DEV_NOTE(x) (1 << (x)) 265 /* Most of the device notification types should only be used for debug. 266 * SW does need to pay attention to function wake notifications. 267 */ 268 #define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1) 269 270 /* CRCR - Command Ring Control Register - cmd_ring bitmasks */ 271 /* bit 0 is the command ring cycle state */ 272 /* stop ring operation after completion of the currently executing command */ 273 #define CMD_RING_PAUSE (1 << 1) 274 /* stop ring immediately - abort the currently executing command */ 275 #define CMD_RING_ABORT (1 << 2) 276 /* true: command ring is running */ 277 #define CMD_RING_RUNNING (1 << 3) 278 /* bits 4:5 reserved and should be preserved */ 279 /* Command Ring pointer - bit mask for the lower 32 bits. */ 280 #define CMD_RING_RSVD_BITS (0x3f) 281 282 /* CONFIG - Configure Register - config_reg bitmasks */ 283 /* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */ 284 #define MAX_DEVS(p) ((p) & 0xff) 285 /* bit 8: U3 Entry Enabled, assert PLC when root port enters U3, xhci 1.1 */ 286 #define CONFIG_U3E (1 << 8) 287 /* bit 9: Configuration Information Enable, xhci 1.1 */ 288 #define CONFIG_CIE (1 << 9) 289 /* bits 10:31 - reserved and should be preserved */ 290 291 /* PORTSC - Port Status and Control Register - port_status_base bitmasks */ 292 /* true: device connected */ 293 #define PORT_CONNECT (1 << 0) 294 /* true: port enabled */ 295 #define PORT_PE (1 << 1) 296 /* bit 2 reserved and zeroed */ 297 /* true: port has an over-current condition */ 298 #define PORT_OC (1 << 3) 299 /* true: port reset signaling asserted */ 300 #define PORT_RESET (1 << 4) 301 /* Port Link State - bits 5:8 302 * A read gives the current link PM state of the port, 303 * a write with Link State Write Strobe set sets the link state. 304 */ 305 #define PORT_PLS_MASK (0xf << 5) 306 #define XDEV_U0 (0x0 << 5) 307 #define XDEV_U1 (0x1 << 5) 308 #define XDEV_U2 (0x2 << 5) 309 #define XDEV_U3 (0x3 << 5) 310 #define XDEV_DISABLED (0x4 << 5) 311 #define XDEV_RXDETECT (0x5 << 5) 312 #define XDEV_INACTIVE (0x6 << 5) 313 #define XDEV_POLLING (0x7 << 5) 314 #define XDEV_RECOVERY (0x8 << 5) 315 #define XDEV_HOT_RESET (0x9 << 5) 316 #define XDEV_COMP_MODE (0xa << 5) 317 #define XDEV_TEST_MODE (0xb << 5) 318 #define XDEV_RESUME (0xf << 5) 319 320 /* true: port has power (see HCC_PPC) */ 321 #define PORT_POWER (1 << 9) 322 /* bits 10:13 indicate device speed: 323 * 0 - undefined speed - port hasn't be initialized by a reset yet 324 * 1 - full speed 325 * 2 - low speed 326 * 3 - high speed 327 * 4 - super speed 328 * 5-15 reserved 329 */ 330 #define DEV_SPEED_MASK (0xf << 10) 331 #define XDEV_FS (0x1 << 10) 332 #define XDEV_LS (0x2 << 10) 333 #define XDEV_HS (0x3 << 10) 334 #define XDEV_SS (0x4 << 10) 335 #define XDEV_SSP (0x5 << 10) 336 #define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10)) 337 #define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS) 338 #define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS) 339 #define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS) 340 #define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS) 341 #define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP) 342 #define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS) 343 #define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f) 344 345 /* Bits 20:23 in the Slot Context are the speed for the device */ 346 #define SLOT_SPEED_FS (XDEV_FS << 10) 347 #define SLOT_SPEED_LS (XDEV_LS << 10) 348 #define SLOT_SPEED_HS (XDEV_HS << 10) 349 #define SLOT_SPEED_SS (XDEV_SS << 10) 350 #define SLOT_SPEED_SSP (XDEV_SSP << 10) 351 /* Port Indicator Control */ 352 #define PORT_LED_OFF (0 << 14) 353 #define PORT_LED_AMBER (1 << 14) 354 #define PORT_LED_GREEN (2 << 14) 355 #define PORT_LED_MASK (3 << 14) 356 /* Port Link State Write Strobe - set this when changing link state */ 357 #define PORT_LINK_STROBE (1 << 16) 358 /* true: connect status change */ 359 #define PORT_CSC (1 << 17) 360 /* true: port enable change */ 361 #define PORT_PEC (1 << 18) 362 /* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port 363 * into an enabled state, and the device into the default state. A "warm" reset 364 * also resets the link, forcing the device through the link training sequence. 365 * SW can also look at the Port Reset register to see when warm reset is done. 366 */ 367 #define PORT_WRC (1 << 19) 368 /* true: over-current change */ 369 #define PORT_OCC (1 << 20) 370 /* true: reset change - 1 to 0 transition of PORT_RESET */ 371 #define PORT_RC (1 << 21) 372 /* port link status change - set on some port link state transitions: 373 * Transition Reason 374 * ------------------------------------------------------------------------------ 375 * - U3 to Resume Wakeup signaling from a device 376 * - Resume to Recovery to U0 USB 3.0 device resume 377 * - Resume to U0 USB 2.0 device resume 378 * - U3 to Recovery to U0 Software resume of USB 3.0 device complete 379 * - U3 to U0 Software resume of USB 2.0 device complete 380 * - U2 to U0 L1 resume of USB 2.1 device complete 381 * - U0 to U0 (???) L1 entry rejection by USB 2.1 device 382 * - U0 to disabled L1 entry error with USB 2.1 device 383 * - Any state to inactive Error on USB 3.0 port 384 */ 385 #define PORT_PLC (1 << 22) 386 /* port configure error change - port failed to configure its link partner */ 387 #define PORT_CEC (1 << 23) 388 #define PORT_CHANGE_MASK (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \ 389 PORT_RC | PORT_PLC | PORT_CEC) 390 391 392 /* Cold Attach Status - xHC can set this bit to report device attached during 393 * Sx state. Warm port reset should be perfomed to clear this bit and move port 394 * to connected state. 395 */ 396 #define PORT_CAS (1 << 24) 397 /* wake on connect (enable) */ 398 #define PORT_WKCONN_E (1 << 25) 399 /* wake on disconnect (enable) */ 400 #define PORT_WKDISC_E (1 << 26) 401 /* wake on over-current (enable) */ 402 #define PORT_WKOC_E (1 << 27) 403 /* bits 28:29 reserved */ 404 /* true: device is non-removable - for USB 3.0 roothub emulation */ 405 #define PORT_DEV_REMOVE (1 << 30) 406 /* Initiate a warm port reset - complete when PORT_WRC is '1' */ 407 #define PORT_WR (1 << 31) 408 409 /* We mark duplicate entries with -1 */ 410 #define DUPLICATE_ENTRY ((u8)(-1)) 411 412 /* Port Power Management Status and Control - port_power_base bitmasks */ 413 /* Inactivity timer value for transitions into U1, in microseconds. 414 * Timeout can be up to 127us. 0xFF means an infinite timeout. 415 */ 416 #define PORT_U1_TIMEOUT(p) ((p) & 0xff) 417 #define PORT_U1_TIMEOUT_MASK 0xff 418 /* Inactivity timer value for transitions into U2 */ 419 #define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8) 420 #define PORT_U2_TIMEOUT_MASK (0xff << 8) 421 /* Bits 24:31 for port testing */ 422 423 /* USB2 Protocol PORTSPMSC */ 424 #define PORT_L1S_MASK 7 425 #define PORT_L1S_SUCCESS 1 426 #define PORT_RWE (1 << 3) 427 #define PORT_HIRD(p) (((p) & 0xf) << 4) 428 #define PORT_HIRD_MASK (0xf << 4) 429 #define PORT_L1DS_MASK (0xff << 8) 430 #define PORT_L1DS(p) (((p) & 0xff) << 8) 431 #define PORT_HLE (1 << 16) 432 #define PORT_TEST_MODE_SHIFT 28 433 434 /* USB3 Protocol PORTLI Port Link Information */ 435 #define PORT_RX_LANES(p) (((p) >> 16) & 0xf) 436 #define PORT_TX_LANES(p) (((p) >> 20) & 0xf) 437 438 /* USB2 Protocol PORTHLPMC */ 439 #define PORT_HIRDM(p)((p) & 3) 440 #define PORT_L1_TIMEOUT(p)(((p) & 0xff) << 2) 441 #define PORT_BESLD(p)(((p) & 0xf) << 10) 442 443 /* use 512 microseconds as USB2 LPM L1 default timeout. */ 444 #define XHCI_L1_TIMEOUT 512 445 446 /* Set default HIRD/BESL value to 4 (350/400us) for USB2 L1 LPM resume latency. 447 * Safe to use with mixed HIRD and BESL systems (host and device) and is used 448 * by other operating systems. 449 * 450 * XHCI 1.0 errata 8/14/12 Table 13 notes: 451 * "Software should choose xHC BESL/BESLD field values that do not violate a 452 * device's resume latency requirements, 453 * e.g. not program values > '4' if BLC = '1' and a HIRD device is attached, 454 * or not program values < '4' if BLC = '0' and a BESL device is attached. 455 */ 456 #define XHCI_DEFAULT_BESL 4 457 458 /* 459 * USB3 specification define a 360ms tPollingLFPSTiemout for USB3 ports 460 * to complete link training. usually link trainig completes much faster 461 * so check status 10 times with 36ms sleep in places we need to wait for 462 * polling to complete. 463 */ 464 #define XHCI_PORT_POLLING_LFPS_TIME 36 465 466 /** 467 * struct xhci_intr_reg - Interrupt Register Set 468 * @irq_pending: IMAN - Interrupt Management Register. Used to enable 469 * interrupts and check for pending interrupts. 470 * @irq_control: IMOD - Interrupt Moderation Register. 471 * Used to throttle interrupts. 472 * @erst_size: Number of segments in the Event Ring Segment Table (ERST). 473 * @erst_base: ERST base address. 474 * @erst_dequeue: Event ring dequeue pointer. 475 * 476 * Each interrupter (defined by a MSI-X vector) has an event ring and an Event 477 * Ring Segment Table (ERST) associated with it. The event ring is comprised of 478 * multiple segments of the same size. The HC places events on the ring and 479 * "updates the Cycle bit in the TRBs to indicate to software the current 480 * position of the Enqueue Pointer." The HCD (Linux) processes those events and 481 * updates the dequeue pointer. 482 */ 483 struct xhci_intr_reg { 484 __le32 irq_pending; 485 __le32 irq_control; 486 __le32 erst_size; 487 __le32 rsvd; 488 __le64 erst_base; 489 __le64 erst_dequeue; 490 }; 491 492 /* irq_pending bitmasks */ 493 #define ER_IRQ_PENDING(p) ((p) & 0x1) 494 /* bits 2:31 need to be preserved */ 495 /* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */ 496 #define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe) 497 #define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2) 498 #define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2)) 499 500 /* irq_control bitmasks */ 501 /* Minimum interval between interrupts (in 250ns intervals). The interval 502 * between interrupts will be longer if there are no events on the event ring. 503 * Default is 4000 (1 ms). 504 */ 505 #define ER_IRQ_INTERVAL_MASK (0xffff) 506 /* Counter used to count down the time to the next interrupt - HW use only */ 507 #define ER_IRQ_COUNTER_MASK (0xffff << 16) 508 509 /* erst_size bitmasks */ 510 /* Preserve bits 16:31 of erst_size */ 511 #define ERST_SIZE_MASK (0xffff << 16) 512 513 /* erst_dequeue bitmasks */ 514 /* Dequeue ERST Segment Index (DESI) - Segment number (or alias) 515 * where the current dequeue pointer lies. This is an optional HW hint. 516 */ 517 #define ERST_DESI_MASK (0x7) 518 /* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by 519 * a work queue (or delayed service routine)? 520 */ 521 #define ERST_EHB (1 << 3) 522 #define ERST_PTR_MASK (0xf) 523 524 /** 525 * struct xhci_run_regs 526 * @microframe_index: 527 * MFINDEX - current microframe number 528 * 529 * Section 5.5 Host Controller Runtime Registers: 530 * "Software should read and write these registers using only Dword (32 bit) 531 * or larger accesses" 532 */ 533 struct xhci_run_regs { 534 __le32 microframe_index; 535 __le32 rsvd[7]; 536 struct xhci_intr_reg ir_set[128]; 537 }; 538 539 /** 540 * struct doorbell_array 541 * 542 * Bits 0 - 7: Endpoint target 543 * Bits 8 - 15: RsvdZ 544 * Bits 16 - 31: Stream ID 545 * 546 * Section 5.6 547 */ 548 struct xhci_doorbell_array { 549 __le32 doorbell[256]; 550 }; 551 552 #define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16)) 553 #define DB_VALUE_HOST 0x00000000 554 555 /** 556 * struct xhci_protocol_caps 557 * @revision: major revision, minor revision, capability ID, 558 * and next capability pointer. 559 * @name_string: Four ASCII characters to say which spec this xHC 560 * follows, typically "USB ". 561 * @port_info: Port offset, count, and protocol-defined information. 562 */ 563 struct xhci_protocol_caps { 564 u32 revision; 565 u32 name_string; 566 u32 port_info; 567 }; 568 569 #define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff) 570 #define XHCI_EXT_PORT_MINOR(x) (((x) >> 16) & 0xff) 571 #define XHCI_EXT_PORT_PSIC(x) (((x) >> 28) & 0x0f) 572 #define XHCI_EXT_PORT_OFF(x) ((x) & 0xff) 573 #define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff) 574 575 #define XHCI_EXT_PORT_PSIV(x) (((x) >> 0) & 0x0f) 576 #define XHCI_EXT_PORT_PSIE(x) (((x) >> 4) & 0x03) 577 #define XHCI_EXT_PORT_PLT(x) (((x) >> 6) & 0x03) 578 #define XHCI_EXT_PORT_PFD(x) (((x) >> 8) & 0x01) 579 #define XHCI_EXT_PORT_LP(x) (((x) >> 14) & 0x03) 580 #define XHCI_EXT_PORT_PSIM(x) (((x) >> 16) & 0xffff) 581 582 #define PLT_MASK (0x03 << 6) 583 #define PLT_SYM (0x00 << 6) 584 #define PLT_ASYM_RX (0x02 << 6) 585 #define PLT_ASYM_TX (0x03 << 6) 586 587 /** 588 * struct xhci_container_ctx 589 * @type: Type of context. Used to calculated offsets to contained contexts. 590 * @size: Size of the context data 591 * @bytes: The raw context data given to HW 592 * @dma: dma address of the bytes 593 * 594 * Represents either a Device or Input context. Holds a pointer to the raw 595 * memory used for the context (bytes) and dma address of it (dma). 596 */ 597 struct xhci_container_ctx { 598 unsigned type; 599 #define XHCI_CTX_TYPE_DEVICE 0x1 600 #define XHCI_CTX_TYPE_INPUT 0x2 601 602 int size; 603 604 u8 *bytes; 605 dma_addr_t dma; 606 }; 607 608 /** 609 * struct xhci_slot_ctx 610 * @dev_info: Route string, device speed, hub info, and last valid endpoint 611 * @dev_info2: Max exit latency for device number, root hub port number 612 * @tt_info: tt_info is used to construct split transaction tokens 613 * @dev_state: slot state and device address 614 * 615 * Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context 616 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes 617 * reserved at the end of the slot context for HC internal use. 618 */ 619 struct xhci_slot_ctx { 620 __le32 dev_info; 621 __le32 dev_info2; 622 __le32 tt_info; 623 __le32 dev_state; 624 /* offset 0x10 to 0x1f reserved for HC internal use */ 625 __le32 reserved[4]; 626 }; 627 628 /* dev_info bitmasks */ 629 /* Route String - 0:19 */ 630 #define ROUTE_STRING_MASK (0xfffff) 631 /* Device speed - values defined by PORTSC Device Speed field - 20:23 */ 632 #define DEV_SPEED (0xf << 20) 633 #define GET_DEV_SPEED(n) (((n) & DEV_SPEED) >> 20) 634 /* bit 24 reserved */ 635 /* Is this LS/FS device connected through a HS hub? - bit 25 */ 636 #define DEV_MTT (0x1 << 25) 637 /* Set if the device is a hub - bit 26 */ 638 #define DEV_HUB (0x1 << 26) 639 /* Index of the last valid endpoint context in this device context - 27:31 */ 640 #define LAST_CTX_MASK (0x1f << 27) 641 #define LAST_CTX(p) ((p) << 27) 642 #define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1) 643 #define SLOT_FLAG (1 << 0) 644 #define EP0_FLAG (1 << 1) 645 646 /* dev_info2 bitmasks */ 647 /* Max Exit Latency (ms) - worst case time to wake up all links in dev path */ 648 #define MAX_EXIT (0xffff) 649 /* Root hub port number that is needed to access the USB device */ 650 #define ROOT_HUB_PORT(p) (((p) & 0xff) << 16) 651 #define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff) 652 /* Maximum number of ports under a hub device */ 653 #define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24) 654 #define DEVINFO_TO_MAX_PORTS(p) (((p) & (0xff << 24)) >> 24) 655 656 /* tt_info bitmasks */ 657 /* 658 * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub 659 * The Slot ID of the hub that isolates the high speed signaling from 660 * this low or full-speed device. '0' if attached to root hub port. 661 */ 662 #define TT_SLOT (0xff) 663 /* 664 * The number of the downstream facing port of the high-speed hub 665 * '0' if the device is not low or full speed. 666 */ 667 #define TT_PORT (0xff << 8) 668 #define TT_THINK_TIME(p) (((p) & 0x3) << 16) 669 #define GET_TT_THINK_TIME(p) (((p) & (0x3 << 16)) >> 16) 670 671 /* dev_state bitmasks */ 672 /* USB device address - assigned by the HC */ 673 #define DEV_ADDR_MASK (0xff) 674 /* bits 8:26 reserved */ 675 /* Slot state */ 676 #define SLOT_STATE (0x1f << 27) 677 #define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27) 678 679 #define SLOT_STATE_DISABLED 0 680 #define SLOT_STATE_ENABLED SLOT_STATE_DISABLED 681 #define SLOT_STATE_DEFAULT 1 682 #define SLOT_STATE_ADDRESSED 2 683 #define SLOT_STATE_CONFIGURED 3 684 685 /** 686 * struct xhci_ep_ctx 687 * @ep_info: endpoint state, streams, mult, and interval information. 688 * @ep_info2: information on endpoint type, max packet size, max burst size, 689 * error count, and whether the HC will force an event for all 690 * transactions. 691 * @deq: 64-bit ring dequeue pointer address. If the endpoint only 692 * defines one stream, this points to the endpoint transfer ring. 693 * Otherwise, it points to a stream context array, which has a 694 * ring pointer for each flow. 695 * @tx_info: 696 * Average TRB lengths for the endpoint ring and 697 * max payload within an Endpoint Service Interval Time (ESIT). 698 * 699 * Endpoint Context - section 6.2.1.2. This assumes the HC uses 32-byte context 700 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes 701 * reserved at the end of the endpoint context for HC internal use. 702 */ 703 struct xhci_ep_ctx { 704 __le32 ep_info; 705 __le32 ep_info2; 706 __le64 deq; 707 __le32 tx_info; 708 /* offset 0x14 - 0x1f reserved for HC internal use */ 709 __le32 reserved[3]; 710 }; 711 712 /* ep_info bitmasks */ 713 /* 714 * Endpoint State - bits 0:2 715 * 0 - disabled 716 * 1 - running 717 * 2 - halted due to halt condition - ok to manipulate endpoint ring 718 * 3 - stopped 719 * 4 - TRB error 720 * 5-7 - reserved 721 */ 722 #define EP_STATE_MASK (0x7) 723 #define EP_STATE_DISABLED 0 724 #define EP_STATE_RUNNING 1 725 #define EP_STATE_HALTED 2 726 #define EP_STATE_STOPPED 3 727 #define EP_STATE_ERROR 4 728 #define GET_EP_CTX_STATE(ctx) (le32_to_cpu((ctx)->ep_info) & EP_STATE_MASK) 729 730 /* Mult - Max number of burtst within an interval, in EP companion desc. */ 731 #define EP_MULT(p) (((p) & 0x3) << 8) 732 #define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3) 733 /* bits 10:14 are Max Primary Streams */ 734 /* bit 15 is Linear Stream Array */ 735 /* Interval - period between requests to an endpoint - 125u increments. */ 736 #define EP_INTERVAL(p) (((p) & 0xff) << 16) 737 #define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff)) 738 #define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff) 739 #define EP_MAXPSTREAMS_MASK (0x1f << 10) 740 #define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK) 741 #define CTX_TO_EP_MAXPSTREAMS(p) (((p) & EP_MAXPSTREAMS_MASK) >> 10) 742 /* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */ 743 #define EP_HAS_LSA (1 << 15) 744 /* hosts with LEC=1 use bits 31:24 as ESIT high bits. */ 745 #define CTX_TO_MAX_ESIT_PAYLOAD_HI(p) (((p) >> 24) & 0xff) 746 747 /* ep_info2 bitmasks */ 748 /* 749 * Force Event - generate transfer events for all TRBs for this endpoint 750 * This will tell the HC to ignore the IOC and ISP flags (for debugging only). 751 */ 752 #define FORCE_EVENT (0x1) 753 #define ERROR_COUNT(p) (((p) & 0x3) << 1) 754 #define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7) 755 #define EP_TYPE(p) ((p) << 3) 756 #define ISOC_OUT_EP 1 757 #define BULK_OUT_EP 2 758 #define INT_OUT_EP 3 759 #define CTRL_EP 4 760 #define ISOC_IN_EP 5 761 #define BULK_IN_EP 6 762 #define INT_IN_EP 7 763 /* bit 6 reserved */ 764 /* bit 7 is Host Initiate Disable - for disabling stream selection */ 765 #define MAX_BURST(p) (((p)&0xff) << 8) 766 #define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff) 767 #define MAX_PACKET(p) (((p)&0xffff) << 16) 768 #define MAX_PACKET_MASK (0xffff << 16) 769 #define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff) 770 771 /* tx_info bitmasks */ 772 #define EP_AVG_TRB_LENGTH(p) ((p) & 0xffff) 773 #define EP_MAX_ESIT_PAYLOAD_LO(p) (((p) & 0xffff) << 16) 774 #define EP_MAX_ESIT_PAYLOAD_HI(p) ((((p) >> 16) & 0xff) << 24) 775 #define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff) 776 777 /* deq bitmasks */ 778 #define EP_CTX_CYCLE_MASK (1 << 0) 779 #define SCTX_DEQ_MASK (~0xfL) 780 781 782 /** 783 * struct xhci_input_control_context 784 * Input control context; see section 6.2.5. 785 * 786 * @drop_context: set the bit of the endpoint context you want to disable 787 * @add_context: set the bit of the endpoint context you want to enable 788 */ 789 struct xhci_input_control_ctx { 790 __le32 drop_flags; 791 __le32 add_flags; 792 __le32 rsvd2[6]; 793 }; 794 795 #define EP_IS_ADDED(ctrl_ctx, i) \ 796 (le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1))) 797 #define EP_IS_DROPPED(ctrl_ctx, i) \ 798 (le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) 799 800 /* Represents everything that is needed to issue a command on the command ring. 801 * It's useful to pre-allocate these for commands that cannot fail due to 802 * out-of-memory errors, like freeing streams. 803 */ 804 struct xhci_command { 805 /* Input context for changing device state */ 806 struct xhci_container_ctx *in_ctx; 807 u32 status; 808 int slot_id; 809 /* If completion is null, no one is waiting on this command 810 * and the structure can be freed after the command completes. 811 */ 812 struct completion *completion; 813 union xhci_trb *command_trb; 814 struct list_head cmd_list; 815 }; 816 817 /* drop context bitmasks */ 818 #define DROP_EP(x) (0x1 << x) 819 /* add context bitmasks */ 820 #define ADD_EP(x) (0x1 << x) 821 822 struct xhci_stream_ctx { 823 /* 64-bit stream ring address, cycle state, and stream type */ 824 __le64 stream_ring; 825 /* offset 0x14 - 0x1f reserved for HC internal use */ 826 __le32 reserved[2]; 827 }; 828 829 /* Stream Context Types (section 6.4.1) - bits 3:1 of stream ctx deq ptr */ 830 #define SCT_FOR_CTX(p) (((p) & 0x7) << 1) 831 /* Secondary stream array type, dequeue pointer is to a transfer ring */ 832 #define SCT_SEC_TR 0 833 /* Primary stream array type, dequeue pointer is to a transfer ring */ 834 #define SCT_PRI_TR 1 835 /* Dequeue pointer is for a secondary stream array (SSA) with 8 entries */ 836 #define SCT_SSA_8 2 837 #define SCT_SSA_16 3 838 #define SCT_SSA_32 4 839 #define SCT_SSA_64 5 840 #define SCT_SSA_128 6 841 #define SCT_SSA_256 7 842 843 /* Assume no secondary streams for now */ 844 struct xhci_stream_info { 845 struct xhci_ring **stream_rings; 846 /* Number of streams, including stream 0 (which drivers can't use) */ 847 unsigned int num_streams; 848 /* The stream context array may be bigger than 849 * the number of streams the driver asked for 850 */ 851 struct xhci_stream_ctx *stream_ctx_array; 852 unsigned int num_stream_ctxs; 853 dma_addr_t ctx_array_dma; 854 /* For mapping physical TRB addresses to segments in stream rings */ 855 struct radix_tree_root trb_address_map; 856 struct xhci_command *free_streams_command; 857 }; 858 859 #define SMALL_STREAM_ARRAY_SIZE 256 860 #define MEDIUM_STREAM_ARRAY_SIZE 1024 861 862 /* Some Intel xHCI host controllers need software to keep track of the bus 863 * bandwidth. Keep track of endpoint info here. Each root port is allocated 864 * the full bus bandwidth. We must also treat TTs (including each port under a 865 * multi-TT hub) as a separate bandwidth domain. The direct memory interface 866 * (DMI) also limits the total bandwidth (across all domains) that can be used. 867 */ 868 struct xhci_bw_info { 869 /* ep_interval is zero-based */ 870 unsigned int ep_interval; 871 /* mult and num_packets are one-based */ 872 unsigned int mult; 873 unsigned int num_packets; 874 unsigned int max_packet_size; 875 unsigned int max_esit_payload; 876 unsigned int type; 877 }; 878 879 /* "Block" sizes in bytes the hardware uses for different device speeds. 880 * The logic in this part of the hardware limits the number of bits the hardware 881 * can use, so must represent bandwidth in a less precise manner to mimic what 882 * the scheduler hardware computes. 883 */ 884 #define FS_BLOCK 1 885 #define HS_BLOCK 4 886 #define SS_BLOCK 16 887 #define DMI_BLOCK 32 888 889 /* Each device speed has a protocol overhead (CRC, bit stuffing, etc) associated 890 * with each byte transferred. SuperSpeed devices have an initial overhead to 891 * set up bursts. These are in blocks, see above. LS overhead has already been 892 * translated into FS blocks. 893 */ 894 #define DMI_OVERHEAD 8 895 #define DMI_OVERHEAD_BURST 4 896 #define SS_OVERHEAD 8 897 #define SS_OVERHEAD_BURST 32 898 #define HS_OVERHEAD 26 899 #define FS_OVERHEAD 20 900 #define LS_OVERHEAD 128 901 /* The TTs need to claim roughly twice as much bandwidth (94 bytes per 902 * microframe ~= 24Mbps) of the HS bus as the devices can actually use because 903 * of overhead associated with split transfers crossing microframe boundaries. 904 * 31 blocks is pure protocol overhead. 905 */ 906 #define TT_HS_OVERHEAD (31 + 94) 907 #define TT_DMI_OVERHEAD (25 + 12) 908 909 /* Bandwidth limits in blocks */ 910 #define FS_BW_LIMIT 1285 911 #define TT_BW_LIMIT 1320 912 #define HS_BW_LIMIT 1607 913 #define SS_BW_LIMIT_IN 3906 914 #define DMI_BW_LIMIT_IN 3906 915 #define SS_BW_LIMIT_OUT 3906 916 #define DMI_BW_LIMIT_OUT 3906 917 918 /* Percentage of bus bandwidth reserved for non-periodic transfers */ 919 #define FS_BW_RESERVED 10 920 #define HS_BW_RESERVED 20 921 #define SS_BW_RESERVED 10 922 923 struct xhci_virt_ep { 924 struct xhci_virt_device *vdev; /* parent */ 925 unsigned int ep_index; 926 struct xhci_ring *ring; 927 /* Related to endpoints that are configured to use stream IDs only */ 928 struct xhci_stream_info *stream_info; 929 /* Temporary storage in case the configure endpoint command fails and we 930 * have to restore the device state to the previous state 931 */ 932 struct xhci_ring *new_ring; 933 unsigned int ep_state; 934 #define SET_DEQ_PENDING (1 << 0) 935 #define EP_HALTED (1 << 1) /* For stall handling */ 936 #define EP_STOP_CMD_PENDING (1 << 2) /* For URB cancellation */ 937 /* Transitioning the endpoint to using streams, don't enqueue URBs */ 938 #define EP_GETTING_STREAMS (1 << 3) 939 #define EP_HAS_STREAMS (1 << 4) 940 /* Transitioning the endpoint to not using streams, don't enqueue URBs */ 941 #define EP_GETTING_NO_STREAMS (1 << 5) 942 #define EP_HARD_CLEAR_TOGGLE (1 << 6) 943 #define EP_SOFT_CLEAR_TOGGLE (1 << 7) 944 /* usb_hub_clear_tt_buffer is in progress */ 945 #define EP_CLEARING_TT (1 << 8) 946 /* ---- Related to URB cancellation ---- */ 947 struct list_head cancelled_td_list; 948 /* Watchdog timer for stop endpoint command to cancel URBs */ 949 struct timer_list stop_cmd_timer; 950 struct xhci_hcd *xhci; 951 /* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue 952 * command. We'll need to update the ring's dequeue segment and dequeue 953 * pointer after the command completes. 954 */ 955 struct xhci_segment *queued_deq_seg; 956 union xhci_trb *queued_deq_ptr; 957 /* 958 * Sometimes the xHC can not process isochronous endpoint ring quickly 959 * enough, and it will miss some isoc tds on the ring and generate 960 * a Missed Service Error Event. 961 * Set skip flag when receive a Missed Service Error Event and 962 * process the missed tds on the endpoint ring. 963 */ 964 bool skip; 965 /* Bandwidth checking storage */ 966 struct xhci_bw_info bw_info; 967 struct list_head bw_endpoint_list; 968 /* Isoch Frame ID checking storage */ 969 int next_frame_id; 970 /* Use new Isoch TRB layout needed for extended TBC support */ 971 bool use_extended_tbc; 972 }; 973 974 enum xhci_overhead_type { 975 LS_OVERHEAD_TYPE = 0, 976 FS_OVERHEAD_TYPE, 977 HS_OVERHEAD_TYPE, 978 }; 979 980 struct xhci_interval_bw { 981 unsigned int num_packets; 982 /* Sorted by max packet size. 983 * Head of the list is the greatest max packet size. 984 */ 985 struct list_head endpoints; 986 /* How many endpoints of each speed are present. */ 987 unsigned int overhead[3]; 988 }; 989 990 #define XHCI_MAX_INTERVAL 16 991 992 struct xhci_interval_bw_table { 993 unsigned int interval0_esit_payload; 994 struct xhci_interval_bw interval_bw[XHCI_MAX_INTERVAL]; 995 /* Includes reserved bandwidth for async endpoints */ 996 unsigned int bw_used; 997 unsigned int ss_bw_in; 998 unsigned int ss_bw_out; 999 }; 1000 1001 #define EP_CTX_PER_DEV 31 1002 1003 struct xhci_virt_device { 1004 int slot_id; 1005 struct usb_device *udev; 1006 /* 1007 * Commands to the hardware are passed an "input context" that 1008 * tells the hardware what to change in its data structures. 1009 * The hardware will return changes in an "output context" that 1010 * software must allocate for the hardware. We need to keep 1011 * track of input and output contexts separately because 1012 * these commands might fail and we don't trust the hardware. 1013 */ 1014 struct xhci_container_ctx *out_ctx; 1015 /* Used for addressing devices and configuration changes */ 1016 struct xhci_container_ctx *in_ctx; 1017 struct xhci_virt_ep eps[EP_CTX_PER_DEV]; 1018 u8 fake_port; 1019 u8 real_port; 1020 struct xhci_interval_bw_table *bw_table; 1021 struct xhci_tt_bw_info *tt_info; 1022 /* 1023 * flags for state tracking based on events and issued commands. 1024 * Software can not rely on states from output contexts because of 1025 * latency between events and xHC updating output context values. 1026 * See xhci 1.1 section 4.8.3 for more details 1027 */ 1028 unsigned long flags; 1029 #define VDEV_PORT_ERROR BIT(0) /* Port error, link inactive */ 1030 1031 /* The current max exit latency for the enabled USB3 link states. */ 1032 u16 current_mel; 1033 /* Used for the debugfs interfaces. */ 1034 void *debugfs_private; 1035 }; 1036 1037 /* 1038 * For each roothub, keep track of the bandwidth information for each periodic 1039 * interval. 1040 * 1041 * If a high speed hub is attached to the roothub, each TT associated with that 1042 * hub is a separate bandwidth domain. The interval information for the 1043 * endpoints on the devices under that TT will appear in the TT structure. 1044 */ 1045 struct xhci_root_port_bw_info { 1046 struct list_head tts; 1047 unsigned int num_active_tts; 1048 struct xhci_interval_bw_table bw_table; 1049 }; 1050 1051 struct xhci_tt_bw_info { 1052 struct list_head tt_list; 1053 int slot_id; 1054 int ttport; 1055 struct xhci_interval_bw_table bw_table; 1056 int active_eps; 1057 }; 1058 1059 1060 /** 1061 * struct xhci_device_context_array 1062 * @dev_context_ptr array of 64-bit DMA addresses for device contexts 1063 */ 1064 struct xhci_device_context_array { 1065 /* 64-bit device addresses; we only write 32-bit addresses */ 1066 __le64 dev_context_ptrs[MAX_HC_SLOTS]; 1067 /* private xHCD pointers */ 1068 dma_addr_t dma; 1069 }; 1070 /* TODO: write function to set the 64-bit device DMA address */ 1071 /* 1072 * TODO: change this to be dynamically sized at HC mem init time since the HC 1073 * might not be able to handle the maximum number of devices possible. 1074 */ 1075 1076 1077 struct xhci_transfer_event { 1078 /* 64-bit buffer address, or immediate data */ 1079 __le64 buffer; 1080 __le32 transfer_len; 1081 /* This field is interpreted differently based on the type of TRB */ 1082 __le32 flags; 1083 }; 1084 1085 /* Transfer event TRB length bit mask */ 1086 /* bits 0:23 */ 1087 #define EVENT_TRB_LEN(p) ((p) & 0xffffff) 1088 1089 /** Transfer Event bit fields **/ 1090 #define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f) 1091 1092 /* Completion Code - only applicable for some types of TRBs */ 1093 #define COMP_CODE_MASK (0xff << 24) 1094 #define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24) 1095 #define COMP_INVALID 0 1096 #define COMP_SUCCESS 1 1097 #define COMP_DATA_BUFFER_ERROR 2 1098 #define COMP_BABBLE_DETECTED_ERROR 3 1099 #define COMP_USB_TRANSACTION_ERROR 4 1100 #define COMP_TRB_ERROR 5 1101 #define COMP_STALL_ERROR 6 1102 #define COMP_RESOURCE_ERROR 7 1103 #define COMP_BANDWIDTH_ERROR 8 1104 #define COMP_NO_SLOTS_AVAILABLE_ERROR 9 1105 #define COMP_INVALID_STREAM_TYPE_ERROR 10 1106 #define COMP_SLOT_NOT_ENABLED_ERROR 11 1107 #define COMP_ENDPOINT_NOT_ENABLED_ERROR 12 1108 #define COMP_SHORT_PACKET 13 1109 #define COMP_RING_UNDERRUN 14 1110 #define COMP_RING_OVERRUN 15 1111 #define COMP_VF_EVENT_RING_FULL_ERROR 16 1112 #define COMP_PARAMETER_ERROR 17 1113 #define COMP_BANDWIDTH_OVERRUN_ERROR 18 1114 #define COMP_CONTEXT_STATE_ERROR 19 1115 #define COMP_NO_PING_RESPONSE_ERROR 20 1116 #define COMP_EVENT_RING_FULL_ERROR 21 1117 #define COMP_INCOMPATIBLE_DEVICE_ERROR 22 1118 #define COMP_MISSED_SERVICE_ERROR 23 1119 #define COMP_COMMAND_RING_STOPPED 24 1120 #define COMP_COMMAND_ABORTED 25 1121 #define COMP_STOPPED 26 1122 #define COMP_STOPPED_LENGTH_INVALID 27 1123 #define COMP_STOPPED_SHORT_PACKET 28 1124 #define COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR 29 1125 #define COMP_ISOCH_BUFFER_OVERRUN 31 1126 #define COMP_EVENT_LOST_ERROR 32 1127 #define COMP_UNDEFINED_ERROR 33 1128 #define COMP_INVALID_STREAM_ID_ERROR 34 1129 #define COMP_SECONDARY_BANDWIDTH_ERROR 35 1130 #define COMP_SPLIT_TRANSACTION_ERROR 36 1131 1132 static inline const char *xhci_trb_comp_code_string(u8 status) 1133 { 1134 switch (status) { 1135 case COMP_INVALID: 1136 return "Invalid"; 1137 case COMP_SUCCESS: 1138 return "Success"; 1139 case COMP_DATA_BUFFER_ERROR: 1140 return "Data Buffer Error"; 1141 case COMP_BABBLE_DETECTED_ERROR: 1142 return "Babble Detected"; 1143 case COMP_USB_TRANSACTION_ERROR: 1144 return "USB Transaction Error"; 1145 case COMP_TRB_ERROR: 1146 return "TRB Error"; 1147 case COMP_STALL_ERROR: 1148 return "Stall Error"; 1149 case COMP_RESOURCE_ERROR: 1150 return "Resource Error"; 1151 case COMP_BANDWIDTH_ERROR: 1152 return "Bandwidth Error"; 1153 case COMP_NO_SLOTS_AVAILABLE_ERROR: 1154 return "No Slots Available Error"; 1155 case COMP_INVALID_STREAM_TYPE_ERROR: 1156 return "Invalid Stream Type Error"; 1157 case COMP_SLOT_NOT_ENABLED_ERROR: 1158 return "Slot Not Enabled Error"; 1159 case COMP_ENDPOINT_NOT_ENABLED_ERROR: 1160 return "Endpoint Not Enabled Error"; 1161 case COMP_SHORT_PACKET: 1162 return "Short Packet"; 1163 case COMP_RING_UNDERRUN: 1164 return "Ring Underrun"; 1165 case COMP_RING_OVERRUN: 1166 return "Ring Overrun"; 1167 case COMP_VF_EVENT_RING_FULL_ERROR: 1168 return "VF Event Ring Full Error"; 1169 case COMP_PARAMETER_ERROR: 1170 return "Parameter Error"; 1171 case COMP_BANDWIDTH_OVERRUN_ERROR: 1172 return "Bandwidth Overrun Error"; 1173 case COMP_CONTEXT_STATE_ERROR: 1174 return "Context State Error"; 1175 case COMP_NO_PING_RESPONSE_ERROR: 1176 return "No Ping Response Error"; 1177 case COMP_EVENT_RING_FULL_ERROR: 1178 return "Event Ring Full Error"; 1179 case COMP_INCOMPATIBLE_DEVICE_ERROR: 1180 return "Incompatible Device Error"; 1181 case COMP_MISSED_SERVICE_ERROR: 1182 return "Missed Service Error"; 1183 case COMP_COMMAND_RING_STOPPED: 1184 return "Command Ring Stopped"; 1185 case COMP_COMMAND_ABORTED: 1186 return "Command Aborted"; 1187 case COMP_STOPPED: 1188 return "Stopped"; 1189 case COMP_STOPPED_LENGTH_INVALID: 1190 return "Stopped - Length Invalid"; 1191 case COMP_STOPPED_SHORT_PACKET: 1192 return "Stopped - Short Packet"; 1193 case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR: 1194 return "Max Exit Latency Too Large Error"; 1195 case COMP_ISOCH_BUFFER_OVERRUN: 1196 return "Isoch Buffer Overrun"; 1197 case COMP_EVENT_LOST_ERROR: 1198 return "Event Lost Error"; 1199 case COMP_UNDEFINED_ERROR: 1200 return "Undefined Error"; 1201 case COMP_INVALID_STREAM_ID_ERROR: 1202 return "Invalid Stream ID Error"; 1203 case COMP_SECONDARY_BANDWIDTH_ERROR: 1204 return "Secondary Bandwidth Error"; 1205 case COMP_SPLIT_TRANSACTION_ERROR: 1206 return "Split Transaction Error"; 1207 default: 1208 return "Unknown!!"; 1209 } 1210 } 1211 1212 struct xhci_link_trb { 1213 /* 64-bit segment pointer*/ 1214 __le64 segment_ptr; 1215 __le32 intr_target; 1216 __le32 control; 1217 }; 1218 1219 /* control bitfields */ 1220 #define LINK_TOGGLE (0x1<<1) 1221 1222 /* Command completion event TRB */ 1223 struct xhci_event_cmd { 1224 /* Pointer to command TRB, or the value passed by the event data trb */ 1225 __le64 cmd_trb; 1226 __le32 status; 1227 __le32 flags; 1228 }; 1229 1230 /* flags bitmasks */ 1231 1232 /* Address device - disable SetAddress */ 1233 #define TRB_BSR (1<<9) 1234 1235 /* Configure Endpoint - Deconfigure */ 1236 #define TRB_DC (1<<9) 1237 1238 /* Stop Ring - Transfer State Preserve */ 1239 #define TRB_TSP (1<<9) 1240 1241 enum xhci_ep_reset_type { 1242 EP_HARD_RESET, 1243 EP_SOFT_RESET, 1244 }; 1245 1246 /* Force Event */ 1247 #define TRB_TO_VF_INTR_TARGET(p) (((p) & (0x3ff << 22)) >> 22) 1248 #define TRB_TO_VF_ID(p) (((p) & (0xff << 16)) >> 16) 1249 1250 /* Set Latency Tolerance Value */ 1251 #define TRB_TO_BELT(p) (((p) & (0xfff << 16)) >> 16) 1252 1253 /* Get Port Bandwidth */ 1254 #define TRB_TO_DEV_SPEED(p) (((p) & (0xf << 16)) >> 16) 1255 1256 /* Force Header */ 1257 #define TRB_TO_PACKET_TYPE(p) ((p) & 0x1f) 1258 #define TRB_TO_ROOTHUB_PORT(p) (((p) & (0xff << 24)) >> 24) 1259 1260 enum xhci_setup_dev { 1261 SETUP_CONTEXT_ONLY, 1262 SETUP_CONTEXT_ADDRESS, 1263 }; 1264 1265 /* bits 16:23 are the virtual function ID */ 1266 /* bits 24:31 are the slot ID */ 1267 #define TRB_TO_SLOT_ID(p) (((p) & (0xff<<24)) >> 24) 1268 #define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24) 1269 1270 /* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */ 1271 #define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1) 1272 #define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16) 1273 1274 #define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23) 1275 #define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23) 1276 #define LAST_EP_INDEX 30 1277 1278 /* Set TR Dequeue Pointer command TRB fields, 6.4.3.9 */ 1279 #define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16)) 1280 #define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16) 1281 #define SCT_FOR_TRB(p) (((p) << 1) & 0x7) 1282 1283 /* Link TRB specific fields */ 1284 #define TRB_TC (1<<1) 1285 1286 /* Port Status Change Event TRB fields */ 1287 /* Port ID - bits 31:24 */ 1288 #define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24) 1289 1290 #define EVENT_DATA (1 << 2) 1291 1292 /* Normal TRB fields */ 1293 /* transfer_len bitmasks - bits 0:16 */ 1294 #define TRB_LEN(p) ((p) & 0x1ffff) 1295 /* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31) */ 1296 #define TRB_TD_SIZE(p) (min((p), (u32)31) << 17) 1297 #define GET_TD_SIZE(p) (((p) & 0x3e0000) >> 17) 1298 /* xhci 1.1 uses the TD_SIZE field for TBC if Extended TBC is enabled (ETE) */ 1299 #define TRB_TD_SIZE_TBC(p) (min((p), (u32)31) << 17) 1300 /* Interrupter Target - which MSI-X vector to target the completion event at */ 1301 #define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22) 1302 #define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff) 1303 /* Total burst count field, Rsvdz on xhci 1.1 with Extended TBC enabled (ETE) */ 1304 #define TRB_TBC(p) (((p) & 0x3) << 7) 1305 #define TRB_TLBPC(p) (((p) & 0xf) << 16) 1306 1307 /* Cycle bit - indicates TRB ownership by HC or HCD */ 1308 #define TRB_CYCLE (1<<0) 1309 /* 1310 * Force next event data TRB to be evaluated before task switch. 1311 * Used to pass OS data back after a TD completes. 1312 */ 1313 #define TRB_ENT (1<<1) 1314 /* Interrupt on short packet */ 1315 #define TRB_ISP (1<<2) 1316 /* Set PCIe no snoop attribute */ 1317 #define TRB_NO_SNOOP (1<<3) 1318 /* Chain multiple TRBs into a TD */ 1319 #define TRB_CHAIN (1<<4) 1320 /* Interrupt on completion */ 1321 #define TRB_IOC (1<<5) 1322 /* The buffer pointer contains immediate data */ 1323 #define TRB_IDT (1<<6) 1324 /* TDs smaller than this might use IDT */ 1325 #define TRB_IDT_MAX_SIZE 8 1326 1327 /* Block Event Interrupt */ 1328 #define TRB_BEI (1<<9) 1329 1330 /* Control transfer TRB specific fields */ 1331 #define TRB_DIR_IN (1<<16) 1332 #define TRB_TX_TYPE(p) ((p) << 16) 1333 #define TRB_DATA_OUT 2 1334 #define TRB_DATA_IN 3 1335 1336 /* Isochronous TRB specific fields */ 1337 #define TRB_SIA (1<<31) 1338 #define TRB_FRAME_ID(p) (((p) & 0x7ff) << 20) 1339 1340 /* TRB cache size for xHC with TRB cache */ 1341 #define TRB_CACHE_SIZE_HS 8 1342 #define TRB_CACHE_SIZE_SS 16 1343 1344 struct xhci_generic_trb { 1345 __le32 field[4]; 1346 }; 1347 1348 union xhci_trb { 1349 struct xhci_link_trb link; 1350 struct xhci_transfer_event trans_event; 1351 struct xhci_event_cmd event_cmd; 1352 struct xhci_generic_trb generic; 1353 }; 1354 1355 /* TRB bit mask */ 1356 #define TRB_TYPE_BITMASK (0xfc00) 1357 #define TRB_TYPE(p) ((p) << 10) 1358 #define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10) 1359 /* TRB type IDs */ 1360 /* bulk, interrupt, isoc scatter/gather, and control data stage */ 1361 #define TRB_NORMAL 1 1362 /* setup stage for control transfers */ 1363 #define TRB_SETUP 2 1364 /* data stage for control transfers */ 1365 #define TRB_DATA 3 1366 /* status stage for control transfers */ 1367 #define TRB_STATUS 4 1368 /* isoc transfers */ 1369 #define TRB_ISOC 5 1370 /* TRB for linking ring segments */ 1371 #define TRB_LINK 6 1372 #define TRB_EVENT_DATA 7 1373 /* Transfer Ring No-op (not for the command ring) */ 1374 #define TRB_TR_NOOP 8 1375 /* Command TRBs */ 1376 /* Enable Slot Command */ 1377 #define TRB_ENABLE_SLOT 9 1378 /* Disable Slot Command */ 1379 #define TRB_DISABLE_SLOT 10 1380 /* Address Device Command */ 1381 #define TRB_ADDR_DEV 11 1382 /* Configure Endpoint Command */ 1383 #define TRB_CONFIG_EP 12 1384 /* Evaluate Context Command */ 1385 #define TRB_EVAL_CONTEXT 13 1386 /* Reset Endpoint Command */ 1387 #define TRB_RESET_EP 14 1388 /* Stop Transfer Ring Command */ 1389 #define TRB_STOP_RING 15 1390 /* Set Transfer Ring Dequeue Pointer Command */ 1391 #define TRB_SET_DEQ 16 1392 /* Reset Device Command */ 1393 #define TRB_RESET_DEV 17 1394 /* Force Event Command (opt) */ 1395 #define TRB_FORCE_EVENT 18 1396 /* Negotiate Bandwidth Command (opt) */ 1397 #define TRB_NEG_BANDWIDTH 19 1398 /* Set Latency Tolerance Value Command (opt) */ 1399 #define TRB_SET_LT 20 1400 /* Get port bandwidth Command */ 1401 #define TRB_GET_BW 21 1402 /* Force Header Command - generate a transaction or link management packet */ 1403 #define TRB_FORCE_HEADER 22 1404 /* No-op Command - not for transfer rings */ 1405 #define TRB_CMD_NOOP 23 1406 /* TRB IDs 24-31 reserved */ 1407 /* Event TRBS */ 1408 /* Transfer Event */ 1409 #define TRB_TRANSFER 32 1410 /* Command Completion Event */ 1411 #define TRB_COMPLETION 33 1412 /* Port Status Change Event */ 1413 #define TRB_PORT_STATUS 34 1414 /* Bandwidth Request Event (opt) */ 1415 #define TRB_BANDWIDTH_EVENT 35 1416 /* Doorbell Event (opt) */ 1417 #define TRB_DOORBELL 36 1418 /* Host Controller Event */ 1419 #define TRB_HC_EVENT 37 1420 /* Device Notification Event - device sent function wake notification */ 1421 #define TRB_DEV_NOTE 38 1422 /* MFINDEX Wrap Event - microframe counter wrapped */ 1423 #define TRB_MFINDEX_WRAP 39 1424 /* TRB IDs 40-47 reserved, 48-63 is vendor-defined */ 1425 #define TRB_VENDOR_DEFINED_LOW 48 1426 /* Nec vendor-specific command completion event. */ 1427 #define TRB_NEC_CMD_COMP 48 1428 /* Get NEC firmware revision. */ 1429 #define TRB_NEC_GET_FW 49 1430 1431 static inline const char *xhci_trb_type_string(u8 type) 1432 { 1433 switch (type) { 1434 case TRB_NORMAL: 1435 return "Normal"; 1436 case TRB_SETUP: 1437 return "Setup Stage"; 1438 case TRB_DATA: 1439 return "Data Stage"; 1440 case TRB_STATUS: 1441 return "Status Stage"; 1442 case TRB_ISOC: 1443 return "Isoch"; 1444 case TRB_LINK: 1445 return "Link"; 1446 case TRB_EVENT_DATA: 1447 return "Event Data"; 1448 case TRB_TR_NOOP: 1449 return "No-Op"; 1450 case TRB_ENABLE_SLOT: 1451 return "Enable Slot Command"; 1452 case TRB_DISABLE_SLOT: 1453 return "Disable Slot Command"; 1454 case TRB_ADDR_DEV: 1455 return "Address Device Command"; 1456 case TRB_CONFIG_EP: 1457 return "Configure Endpoint Command"; 1458 case TRB_EVAL_CONTEXT: 1459 return "Evaluate Context Command"; 1460 case TRB_RESET_EP: 1461 return "Reset Endpoint Command"; 1462 case TRB_STOP_RING: 1463 return "Stop Ring Command"; 1464 case TRB_SET_DEQ: 1465 return "Set TR Dequeue Pointer Command"; 1466 case TRB_RESET_DEV: 1467 return "Reset Device Command"; 1468 case TRB_FORCE_EVENT: 1469 return "Force Event Command"; 1470 case TRB_NEG_BANDWIDTH: 1471 return "Negotiate Bandwidth Command"; 1472 case TRB_SET_LT: 1473 return "Set Latency Tolerance Value Command"; 1474 case TRB_GET_BW: 1475 return "Get Port Bandwidth Command"; 1476 case TRB_FORCE_HEADER: 1477 return "Force Header Command"; 1478 case TRB_CMD_NOOP: 1479 return "No-Op Command"; 1480 case TRB_TRANSFER: 1481 return "Transfer Event"; 1482 case TRB_COMPLETION: 1483 return "Command Completion Event"; 1484 case TRB_PORT_STATUS: 1485 return "Port Status Change Event"; 1486 case TRB_BANDWIDTH_EVENT: 1487 return "Bandwidth Request Event"; 1488 case TRB_DOORBELL: 1489 return "Doorbell Event"; 1490 case TRB_HC_EVENT: 1491 return "Host Controller Event"; 1492 case TRB_DEV_NOTE: 1493 return "Device Notification Event"; 1494 case TRB_MFINDEX_WRAP: 1495 return "MFINDEX Wrap Event"; 1496 case TRB_NEC_CMD_COMP: 1497 return "NEC Command Completion Event"; 1498 case TRB_NEC_GET_FW: 1499 return "NET Get Firmware Revision Command"; 1500 default: 1501 return "UNKNOWN"; 1502 } 1503 } 1504 1505 #define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK)) 1506 /* Above, but for __le32 types -- can avoid work by swapping constants: */ 1507 #define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ 1508 cpu_to_le32(TRB_TYPE(TRB_LINK))) 1509 #define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ 1510 cpu_to_le32(TRB_TYPE(TRB_TR_NOOP))) 1511 1512 #define NEC_FW_MINOR(p) (((p) >> 0) & 0xff) 1513 #define NEC_FW_MAJOR(p) (((p) >> 8) & 0xff) 1514 1515 /* 1516 * TRBS_PER_SEGMENT must be a multiple of 4, 1517 * since the command ring is 64-byte aligned. 1518 * It must also be greater than 16. 1519 */ 1520 #define TRBS_PER_SEGMENT 256 1521 /* Allow two commands + a link TRB, along with any reserved command TRBs */ 1522 #define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3) 1523 #define TRB_SEGMENT_SIZE (TRBS_PER_SEGMENT*16) 1524 #define TRB_SEGMENT_SHIFT (ilog2(TRB_SEGMENT_SIZE)) 1525 /* TRB buffer pointers can't cross 64KB boundaries */ 1526 #define TRB_MAX_BUFF_SHIFT 16 1527 #define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT) 1528 /* How much data is left before the 64KB boundary? */ 1529 #define TRB_BUFF_LEN_UP_TO_BOUNDARY(addr) (TRB_MAX_BUFF_SIZE - \ 1530 (addr & (TRB_MAX_BUFF_SIZE - 1))) 1531 #define MAX_SOFT_RETRY 3 1532 /* 1533 * Limits of consecutive isoc trbs that can Block Event Interrupt (BEI) if 1534 * XHCI_AVOID_BEI quirk is in use. 1535 */ 1536 #define AVOID_BEI_INTERVAL_MIN 8 1537 #define AVOID_BEI_INTERVAL_MAX 32 1538 1539 struct xhci_segment { 1540 union xhci_trb *trbs; 1541 /* private to HCD */ 1542 struct xhci_segment *next; 1543 dma_addr_t dma; 1544 /* Max packet sized bounce buffer for td-fragmant alignment */ 1545 dma_addr_t bounce_dma; 1546 void *bounce_buf; 1547 unsigned int bounce_offs; 1548 unsigned int bounce_len; 1549 }; 1550 1551 enum xhci_cancelled_td_status { 1552 TD_DIRTY = 0, 1553 TD_HALTED, 1554 TD_CLEARING_CACHE, 1555 TD_CLEARED, 1556 }; 1557 1558 struct xhci_td { 1559 struct list_head td_list; 1560 struct list_head cancelled_td_list; 1561 int status; 1562 enum xhci_cancelled_td_status cancel_status; 1563 struct urb *urb; 1564 struct xhci_segment *start_seg; 1565 union xhci_trb *first_trb; 1566 union xhci_trb *last_trb; 1567 struct xhci_segment *last_trb_seg; 1568 struct xhci_segment *bounce_seg; 1569 /* actual_length of the URB has already been set */ 1570 bool urb_length_set; 1571 unsigned int num_trbs; 1572 }; 1573 1574 /* xHCI command default timeout value */ 1575 #define XHCI_CMD_DEFAULT_TIMEOUT (5 * HZ) 1576 1577 /* command descriptor */ 1578 struct xhci_cd { 1579 struct xhci_command *command; 1580 union xhci_trb *cmd_trb; 1581 }; 1582 1583 enum xhci_ring_type { 1584 TYPE_CTRL = 0, 1585 TYPE_ISOC, 1586 TYPE_BULK, 1587 TYPE_INTR, 1588 TYPE_STREAM, 1589 TYPE_COMMAND, 1590 TYPE_EVENT, 1591 }; 1592 1593 static inline const char *xhci_ring_type_string(enum xhci_ring_type type) 1594 { 1595 switch (type) { 1596 case TYPE_CTRL: 1597 return "CTRL"; 1598 case TYPE_ISOC: 1599 return "ISOC"; 1600 case TYPE_BULK: 1601 return "BULK"; 1602 case TYPE_INTR: 1603 return "INTR"; 1604 case TYPE_STREAM: 1605 return "STREAM"; 1606 case TYPE_COMMAND: 1607 return "CMD"; 1608 case TYPE_EVENT: 1609 return "EVENT"; 1610 } 1611 1612 return "UNKNOWN"; 1613 } 1614 1615 struct xhci_ring { 1616 struct xhci_segment *first_seg; 1617 struct xhci_segment *last_seg; 1618 union xhci_trb *enqueue; 1619 struct xhci_segment *enq_seg; 1620 union xhci_trb *dequeue; 1621 struct xhci_segment *deq_seg; 1622 struct list_head td_list; 1623 /* 1624 * Write the cycle state into the TRB cycle field to give ownership of 1625 * the TRB to the host controller (if we are the producer), or to check 1626 * if we own the TRB (if we are the consumer). See section 4.9.1. 1627 */ 1628 u32 cycle_state; 1629 unsigned int err_count; 1630 unsigned int stream_id; 1631 unsigned int num_segs; 1632 unsigned int num_trbs_free; 1633 unsigned int num_trbs_free_temp; 1634 unsigned int bounce_buf_len; 1635 enum xhci_ring_type type; 1636 bool last_td_was_short; 1637 struct radix_tree_root *trb_address_map; 1638 }; 1639 1640 struct xhci_erst_entry { 1641 /* 64-bit event ring segment address */ 1642 __le64 seg_addr; 1643 __le32 seg_size; 1644 /* Set to zero */ 1645 __le32 rsvd; 1646 }; 1647 1648 struct xhci_erst { 1649 struct xhci_erst_entry *entries; 1650 unsigned int num_entries; 1651 /* xhci->event_ring keeps track of segment dma addresses */ 1652 dma_addr_t erst_dma_addr; 1653 /* Num entries the ERST can contain */ 1654 unsigned int erst_size; 1655 }; 1656 1657 struct xhci_scratchpad { 1658 u64 *sp_array; 1659 dma_addr_t sp_dma; 1660 void **sp_buffers; 1661 }; 1662 1663 struct urb_priv { 1664 int num_tds; 1665 int num_tds_done; 1666 struct xhci_td td[]; 1667 }; 1668 1669 /* 1670 * Each segment table entry is 4*32bits long. 1K seems like an ok size: 1671 * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table, 1672 * meaning 64 ring segments. 1673 * Initial allocated size of the ERST, in number of entries */ 1674 #define ERST_NUM_SEGS 1 1675 /* Poll every 60 seconds */ 1676 #define POLL_TIMEOUT 60 1677 /* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */ 1678 #define XHCI_STOP_EP_CMD_TIMEOUT 5 1679 /* XXX: Make these module parameters */ 1680 1681 struct s3_save { 1682 u32 command; 1683 u32 dev_nt; 1684 u64 dcbaa_ptr; 1685 u32 config_reg; 1686 u32 irq_pending; 1687 u32 irq_control; 1688 u32 erst_size; 1689 u64 erst_base; 1690 u64 erst_dequeue; 1691 }; 1692 1693 /* Use for lpm */ 1694 struct dev_info { 1695 u32 dev_id; 1696 struct list_head list; 1697 }; 1698 1699 struct xhci_bus_state { 1700 unsigned long bus_suspended; 1701 unsigned long next_statechange; 1702 1703 /* Port suspend arrays are indexed by the portnum of the fake roothub */ 1704 /* ports suspend status arrays - max 31 ports for USB2, 15 for USB3 */ 1705 u32 port_c_suspend; 1706 u32 suspended_ports; 1707 u32 port_remote_wakeup; 1708 unsigned long resume_done[USB_MAXCHILDREN]; 1709 /* which ports have started to resume */ 1710 unsigned long resuming_ports; 1711 /* Which ports are waiting on RExit to U0 transition. */ 1712 unsigned long rexit_ports; 1713 struct completion rexit_done[USB_MAXCHILDREN]; 1714 struct completion u3exit_done[USB_MAXCHILDREN]; 1715 }; 1716 1717 1718 /* 1719 * It can take up to 20 ms to transition from RExit to U0 on the 1720 * Intel Lynx Point LP xHCI host. 1721 */ 1722 #define XHCI_MAX_REXIT_TIMEOUT_MS 20 1723 struct xhci_port_cap { 1724 u32 *psi; /* array of protocol speed ID entries */ 1725 u8 psi_count; 1726 u8 psi_uid_count; 1727 u8 maj_rev; 1728 u8 min_rev; 1729 }; 1730 1731 struct xhci_port { 1732 __le32 __iomem *addr; 1733 int hw_portnum; 1734 int hcd_portnum; 1735 struct xhci_hub *rhub; 1736 struct xhci_port_cap *port_cap; 1737 }; 1738 1739 struct xhci_hub { 1740 struct xhci_port **ports; 1741 unsigned int num_ports; 1742 struct usb_hcd *hcd; 1743 /* keep track of bus suspend info */ 1744 struct xhci_bus_state bus_state; 1745 /* supported prococol extended capabiliy values */ 1746 u8 maj_rev; 1747 u8 min_rev; 1748 }; 1749 1750 /* There is one xhci_hcd structure per controller */ 1751 struct xhci_hcd { 1752 struct usb_hcd *main_hcd; 1753 struct usb_hcd *shared_hcd; 1754 /* glue to PCI and HCD framework */ 1755 struct xhci_cap_regs __iomem *cap_regs; 1756 struct xhci_op_regs __iomem *op_regs; 1757 struct xhci_run_regs __iomem *run_regs; 1758 struct xhci_doorbell_array __iomem *dba; 1759 /* Our HCD's current interrupter register set */ 1760 struct xhci_intr_reg __iomem *ir_set; 1761 1762 /* Cached register copies of read-only HC data */ 1763 __u32 hcs_params1; 1764 __u32 hcs_params2; 1765 __u32 hcs_params3; 1766 __u32 hcc_params; 1767 __u32 hcc_params2; 1768 1769 spinlock_t lock; 1770 1771 /* packed release number */ 1772 u8 sbrn; 1773 u16 hci_version; 1774 u8 max_slots; 1775 u8 max_interrupters; 1776 u8 max_ports; 1777 u8 isoc_threshold; 1778 /* imod_interval in ns (I * 250ns) */ 1779 u32 imod_interval; 1780 u32 isoc_bei_interval; 1781 int event_ring_max; 1782 /* 4KB min, 128MB max */ 1783 int page_size; 1784 /* Valid values are 12 to 20, inclusive */ 1785 int page_shift; 1786 /* msi-x vectors */ 1787 int msix_count; 1788 /* optional clocks */ 1789 struct clk *clk; 1790 struct clk *reg_clk; 1791 /* optional reset controller */ 1792 struct reset_control *reset; 1793 /* data structures */ 1794 struct xhci_device_context_array *dcbaa; 1795 struct xhci_ring *cmd_ring; 1796 unsigned int cmd_ring_state; 1797 #define CMD_RING_STATE_RUNNING (1 << 0) 1798 #define CMD_RING_STATE_ABORTED (1 << 1) 1799 #define CMD_RING_STATE_STOPPED (1 << 2) 1800 struct list_head cmd_list; 1801 unsigned int cmd_ring_reserved_trbs; 1802 struct delayed_work cmd_timer; 1803 struct completion cmd_ring_stop_completion; 1804 struct xhci_command *current_cmd; 1805 struct xhci_ring *event_ring; 1806 struct xhci_erst erst; 1807 /* Scratchpad */ 1808 struct xhci_scratchpad *scratchpad; 1809 /* Store LPM test failed devices' information */ 1810 struct list_head lpm_failed_devs; 1811 1812 /* slot enabling and address device helpers */ 1813 /* these are not thread safe so use mutex */ 1814 struct mutex mutex; 1815 /* For USB 3.0 LPM enable/disable. */ 1816 struct xhci_command *lpm_command; 1817 /* Internal mirror of the HW's dcbaa */ 1818 struct xhci_virt_device *devs[MAX_HC_SLOTS]; 1819 /* For keeping track of bandwidth domains per roothub. */ 1820 struct xhci_root_port_bw_info *rh_bw; 1821 1822 /* DMA pools */ 1823 struct dma_pool *device_pool; 1824 struct dma_pool *segment_pool; 1825 struct dma_pool *small_streams_pool; 1826 struct dma_pool *medium_streams_pool; 1827 1828 /* Host controller watchdog timer structures */ 1829 unsigned int xhc_state; 1830 1831 u32 command; 1832 struct s3_save s3; 1833 /* Host controller is dying - not responding to commands. "I'm not dead yet!" 1834 * 1835 * xHC interrupts have been disabled and a watchdog timer will (or has already) 1836 * halt the xHCI host, and complete all URBs with an -ESHUTDOWN code. Any code 1837 * that sees this status (other than the timer that set it) should stop touching 1838 * hardware immediately. Interrupt handlers should return immediately when 1839 * they see this status (any time they drop and re-acquire xhci->lock). 1840 * xhci_urb_dequeue() should call usb_hcd_check_unlink_urb() and return without 1841 * putting the TD on the canceled list, etc. 1842 * 1843 * There are no reports of xHCI host controllers that display this issue. 1844 */ 1845 #define XHCI_STATE_DYING (1 << 0) 1846 #define XHCI_STATE_HALTED (1 << 1) 1847 #define XHCI_STATE_REMOVING (1 << 2) 1848 unsigned long long quirks; 1849 #define XHCI_LINK_TRB_QUIRK BIT_ULL(0) 1850 #define XHCI_RESET_EP_QUIRK BIT_ULL(1) 1851 #define XHCI_NEC_HOST BIT_ULL(2) 1852 #define XHCI_AMD_PLL_FIX BIT_ULL(3) 1853 #define XHCI_SPURIOUS_SUCCESS BIT_ULL(4) 1854 /* 1855 * Certain Intel host controllers have a limit to the number of endpoint 1856 * contexts they can handle. Ideally, they would signal that they can't handle 1857 * anymore endpoint contexts by returning a Resource Error for the Configure 1858 * Endpoint command, but they don't. Instead they expect software to keep track 1859 * of the number of active endpoints for them, across configure endpoint 1860 * commands, reset device commands, disable slot commands, and address device 1861 * commands. 1862 */ 1863 #define XHCI_EP_LIMIT_QUIRK BIT_ULL(5) 1864 #define XHCI_BROKEN_MSI BIT_ULL(6) 1865 #define XHCI_RESET_ON_RESUME BIT_ULL(7) 1866 #define XHCI_SW_BW_CHECKING BIT_ULL(8) 1867 #define XHCI_AMD_0x96_HOST BIT_ULL(9) 1868 #define XHCI_TRUST_TX_LENGTH BIT_ULL(10) 1869 #define XHCI_LPM_SUPPORT BIT_ULL(11) 1870 #define XHCI_INTEL_HOST BIT_ULL(12) 1871 #define XHCI_SPURIOUS_REBOOT BIT_ULL(13) 1872 #define XHCI_COMP_MODE_QUIRK BIT_ULL(14) 1873 #define XHCI_AVOID_BEI BIT_ULL(15) 1874 #define XHCI_PLAT BIT_ULL(16) 1875 #define XHCI_SLOW_SUSPEND BIT_ULL(17) 1876 #define XHCI_SPURIOUS_WAKEUP BIT_ULL(18) 1877 /* For controllers with a broken beyond repair streams implementation */ 1878 #define XHCI_BROKEN_STREAMS BIT_ULL(19) 1879 #define XHCI_PME_STUCK_QUIRK BIT_ULL(20) 1880 #define XHCI_MTK_HOST BIT_ULL(21) 1881 #define XHCI_SSIC_PORT_UNUSED BIT_ULL(22) 1882 #define XHCI_NO_64BIT_SUPPORT BIT_ULL(23) 1883 #define XHCI_MISSING_CAS BIT_ULL(24) 1884 /* For controller with a broken Port Disable implementation */ 1885 #define XHCI_BROKEN_PORT_PED BIT_ULL(25) 1886 #define XHCI_LIMIT_ENDPOINT_INTERVAL_7 BIT_ULL(26) 1887 #define XHCI_U2_DISABLE_WAKE BIT_ULL(27) 1888 #define XHCI_ASMEDIA_MODIFY_FLOWCONTROL BIT_ULL(28) 1889 #define XHCI_HW_LPM_DISABLE BIT_ULL(29) 1890 #define XHCI_SUSPEND_DELAY BIT_ULL(30) 1891 #define XHCI_INTEL_USB_ROLE_SW BIT_ULL(31) 1892 #define XHCI_ZERO_64B_REGS BIT_ULL(32) 1893 #define XHCI_DEFAULT_PM_RUNTIME_ALLOW BIT_ULL(33) 1894 #define XHCI_RESET_PLL_ON_DISCONNECT BIT_ULL(34) 1895 #define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35) 1896 #define XHCI_RENESAS_FW_QUIRK BIT_ULL(36) 1897 #define XHCI_SKIP_PHY_INIT BIT_ULL(37) 1898 #define XHCI_DISABLE_SPARSE BIT_ULL(38) 1899 #define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(39) 1900 #define XHCI_NO_SOFT_RETRY BIT_ULL(40) 1901 #define XHCI_BROKEN_D3COLD BIT_ULL(41) 1902 1903 unsigned int num_active_eps; 1904 unsigned int limit_active_eps; 1905 struct xhci_port *hw_ports; 1906 struct xhci_hub usb2_rhub; 1907 struct xhci_hub usb3_rhub; 1908 /* support xHCI 1.0 spec USB2 hardware LPM */ 1909 unsigned hw_lpm_support:1; 1910 /* Broken Suspend flag for SNPS Suspend resume issue */ 1911 unsigned broken_suspend:1; 1912 /* cached usb2 extened protocol capabilites */ 1913 u32 *ext_caps; 1914 unsigned int num_ext_caps; 1915 /* cached extended protocol port capabilities */ 1916 struct xhci_port_cap *port_caps; 1917 unsigned int num_port_caps; 1918 /* Compliance Mode Recovery Data */ 1919 struct timer_list comp_mode_recovery_timer; 1920 u32 port_status_u0; 1921 u16 test_mode; 1922 /* Compliance Mode Timer Triggered every 2 seconds */ 1923 #define COMP_MODE_RCVRY_MSECS 2000 1924 1925 struct dentry *debugfs_root; 1926 struct dentry *debugfs_slots; 1927 struct list_head regset_list; 1928 1929 void *dbc; 1930 /* platform-specific data -- must come last */ 1931 unsigned long priv[] __aligned(sizeof(s64)); 1932 }; 1933 1934 /* Platform specific overrides to generic XHCI hc_driver ops */ 1935 struct xhci_driver_overrides { 1936 size_t extra_priv_size; 1937 int (*reset)(struct usb_hcd *hcd); 1938 int (*start)(struct usb_hcd *hcd); 1939 int (*add_endpoint)(struct usb_hcd *hcd, struct usb_device *udev, 1940 struct usb_host_endpoint *ep); 1941 int (*drop_endpoint)(struct usb_hcd *hcd, struct usb_device *udev, 1942 struct usb_host_endpoint *ep); 1943 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *); 1944 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); 1945 }; 1946 1947 #define XHCI_CFC_DELAY 10 1948 1949 /* convert between an HCD pointer and the corresponding EHCI_HCD */ 1950 static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd) 1951 { 1952 struct usb_hcd *primary_hcd; 1953 1954 if (usb_hcd_is_primary_hcd(hcd)) 1955 primary_hcd = hcd; 1956 else 1957 primary_hcd = hcd->primary_hcd; 1958 1959 return (struct xhci_hcd *) (primary_hcd->hcd_priv); 1960 } 1961 1962 static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci) 1963 { 1964 return xhci->main_hcd; 1965 } 1966 1967 #define xhci_dbg(xhci, fmt, args...) \ 1968 dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args) 1969 #define xhci_err(xhci, fmt, args...) \ 1970 dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args) 1971 #define xhci_warn(xhci, fmt, args...) \ 1972 dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args) 1973 #define xhci_warn_ratelimited(xhci, fmt, args...) \ 1974 dev_warn_ratelimited(xhci_to_hcd(xhci)->self.controller , fmt , ## args) 1975 #define xhci_info(xhci, fmt, args...) \ 1976 dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args) 1977 1978 /* 1979 * Registers should always be accessed with double word or quad word accesses. 1980 * 1981 * Some xHCI implementations may support 64-bit address pointers. Registers 1982 * with 64-bit address pointers should be written to with dword accesses by 1983 * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second. 1984 * xHCI implementations that do not support 64-bit address pointers will ignore 1985 * the high dword, and write order is irrelevant. 1986 */ 1987 static inline u64 xhci_read_64(const struct xhci_hcd *xhci, 1988 __le64 __iomem *regs) 1989 { 1990 return lo_hi_readq(regs); 1991 } 1992 static inline void xhci_write_64(struct xhci_hcd *xhci, 1993 const u64 val, __le64 __iomem *regs) 1994 { 1995 lo_hi_writeq(val, regs); 1996 } 1997 1998 static inline int xhci_link_trb_quirk(struct xhci_hcd *xhci) 1999 { 2000 return xhci->quirks & XHCI_LINK_TRB_QUIRK; 2001 } 2002 2003 /* xHCI debugging */ 2004 char *xhci_get_slot_state(struct xhci_hcd *xhci, 2005 struct xhci_container_ctx *ctx); 2006 void xhci_dbg_trace(struct xhci_hcd *xhci, void (*trace)(struct va_format *), 2007 const char *fmt, ...); 2008 2009 /* xHCI memory management */ 2010 void xhci_mem_cleanup(struct xhci_hcd *xhci); 2011 int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags); 2012 void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id); 2013 int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags); 2014 int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev); 2015 void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci, 2016 struct usb_device *udev); 2017 unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc); 2018 unsigned int xhci_get_endpoint_address(unsigned int ep_index); 2019 unsigned int xhci_last_valid_endpoint(u32 added_ctxs); 2020 void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep); 2021 void xhci_update_tt_active_eps(struct xhci_hcd *xhci, 2022 struct xhci_virt_device *virt_dev, 2023 int old_active_eps); 2024 void xhci_clear_endpoint_bw_info(struct xhci_bw_info *bw_info); 2025 void xhci_update_bw_info(struct xhci_hcd *xhci, 2026 struct xhci_container_ctx *in_ctx, 2027 struct xhci_input_control_ctx *ctrl_ctx, 2028 struct xhci_virt_device *virt_dev); 2029 void xhci_endpoint_copy(struct xhci_hcd *xhci, 2030 struct xhci_container_ctx *in_ctx, 2031 struct xhci_container_ctx *out_ctx, 2032 unsigned int ep_index); 2033 void xhci_slot_copy(struct xhci_hcd *xhci, 2034 struct xhci_container_ctx *in_ctx, 2035 struct xhci_container_ctx *out_ctx); 2036 int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, 2037 struct usb_device *udev, struct usb_host_endpoint *ep, 2038 gfp_t mem_flags); 2039 struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, 2040 unsigned int num_segs, unsigned int cycle_state, 2041 enum xhci_ring_type type, unsigned int max_packet, gfp_t flags); 2042 void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring); 2043 int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring, 2044 unsigned int num_trbs, gfp_t flags); 2045 int xhci_alloc_erst(struct xhci_hcd *xhci, 2046 struct xhci_ring *evt_ring, 2047 struct xhci_erst *erst, 2048 gfp_t flags); 2049 void xhci_initialize_ring_info(struct xhci_ring *ring, 2050 unsigned int cycle_state); 2051 void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst); 2052 void xhci_free_endpoint_ring(struct xhci_hcd *xhci, 2053 struct xhci_virt_device *virt_dev, 2054 unsigned int ep_index); 2055 struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, 2056 unsigned int num_stream_ctxs, 2057 unsigned int num_streams, 2058 unsigned int max_packet, gfp_t flags); 2059 void xhci_free_stream_info(struct xhci_hcd *xhci, 2060 struct xhci_stream_info *stream_info); 2061 void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci, 2062 struct xhci_ep_ctx *ep_ctx, 2063 struct xhci_stream_info *stream_info); 2064 void xhci_setup_no_streams_ep_input_ctx(struct xhci_ep_ctx *ep_ctx, 2065 struct xhci_virt_ep *ep); 2066 void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, 2067 struct xhci_virt_device *virt_dev, bool drop_control_ep); 2068 struct xhci_ring *xhci_dma_to_transfer_ring( 2069 struct xhci_virt_ep *ep, 2070 u64 address); 2071 struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, 2072 bool allocate_completion, gfp_t mem_flags); 2073 struct xhci_command *xhci_alloc_command_with_ctx(struct xhci_hcd *xhci, 2074 bool allocate_completion, gfp_t mem_flags); 2075 void xhci_urb_free_priv(struct urb_priv *urb_priv); 2076 void xhci_free_command(struct xhci_hcd *xhci, 2077 struct xhci_command *command); 2078 struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, 2079 int type, gfp_t flags); 2080 void xhci_free_container_ctx(struct xhci_hcd *xhci, 2081 struct xhci_container_ctx *ctx); 2082 2083 /* xHCI host controller glue */ 2084 typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *); 2085 int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, int usec); 2086 void xhci_quiesce(struct xhci_hcd *xhci); 2087 int xhci_halt(struct xhci_hcd *xhci); 2088 int xhci_start(struct xhci_hcd *xhci); 2089 int xhci_reset(struct xhci_hcd *xhci); 2090 int xhci_run(struct usb_hcd *hcd); 2091 int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks); 2092 void xhci_shutdown(struct usb_hcd *hcd); 2093 void xhci_init_driver(struct hc_driver *drv, 2094 const struct xhci_driver_overrides *over); 2095 int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, 2096 struct usb_host_endpoint *ep); 2097 int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, 2098 struct usb_host_endpoint *ep); 2099 int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev); 2100 void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev); 2101 int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id); 2102 int xhci_ext_cap_init(struct xhci_hcd *xhci); 2103 2104 int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup); 2105 int xhci_resume(struct xhci_hcd *xhci, bool hibernated); 2106 2107 irqreturn_t xhci_irq(struct usb_hcd *hcd); 2108 irqreturn_t xhci_msi_irq(int irq, void *hcd); 2109 int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev); 2110 int xhci_alloc_tt_info(struct xhci_hcd *xhci, 2111 struct xhci_virt_device *virt_dev, 2112 struct usb_device *hdev, 2113 struct usb_tt *tt, gfp_t mem_flags); 2114 2115 /* xHCI ring, segment, TRB, and TD functions */ 2116 dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb); 2117 struct xhci_segment *trb_in_td(struct xhci_hcd *xhci, 2118 struct xhci_segment *start_seg, union xhci_trb *start_trb, 2119 union xhci_trb *end_trb, dma_addr_t suspect_dma, bool debug); 2120 int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code); 2121 void xhci_ring_cmd_db(struct xhci_hcd *xhci); 2122 int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd, 2123 u32 trb_type, u32 slot_id); 2124 int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd, 2125 dma_addr_t in_ctx_ptr, u32 slot_id, enum xhci_setup_dev); 2126 int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd, 2127 u32 field1, u32 field2, u32 field3, u32 field4); 2128 int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd, 2129 int slot_id, unsigned int ep_index, int suspend); 2130 int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb, 2131 int slot_id, unsigned int ep_index); 2132 int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb, 2133 int slot_id, unsigned int ep_index); 2134 int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb, 2135 int slot_id, unsigned int ep_index); 2136 int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags, 2137 struct urb *urb, int slot_id, unsigned int ep_index); 2138 int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, 2139 struct xhci_command *cmd, dma_addr_t in_ctx_ptr, u32 slot_id, 2140 bool command_must_succeed); 2141 int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd, 2142 dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed); 2143 int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd, 2144 int slot_id, unsigned int ep_index, 2145 enum xhci_ep_reset_type reset_type); 2146 int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd, 2147 u32 slot_id); 2148 void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, unsigned int slot_id, 2149 unsigned int ep_index, unsigned int stream_id, 2150 struct xhci_td *td); 2151 void xhci_stop_endpoint_command_watchdog(struct timer_list *t); 2152 void xhci_handle_command_timeout(struct work_struct *work); 2153 2154 void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id, 2155 unsigned int ep_index, unsigned int stream_id); 2156 void xhci_ring_doorbell_for_active_rings(struct xhci_hcd *xhci, 2157 unsigned int slot_id, 2158 unsigned int ep_index); 2159 void xhci_cleanup_command_queue(struct xhci_hcd *xhci); 2160 void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring); 2161 unsigned int count_trbs(u64 addr, u64 len); 2162 2163 /* xHCI roothub code */ 2164 void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port, 2165 u32 link_state); 2166 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port, 2167 u32 port_bit); 2168 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, 2169 char *buf, u16 wLength); 2170 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf); 2171 int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1); 2172 struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd); 2173 2174 void xhci_hc_died(struct xhci_hcd *xhci); 2175 2176 #ifdef CONFIG_PM 2177 int xhci_bus_suspend(struct usb_hcd *hcd); 2178 int xhci_bus_resume(struct usb_hcd *hcd); 2179 unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd); 2180 #else 2181 #define xhci_bus_suspend NULL 2182 #define xhci_bus_resume NULL 2183 #define xhci_get_resuming_ports NULL 2184 #endif /* CONFIG_PM */ 2185 2186 u32 xhci_port_state_to_neutral(u32 state); 2187 int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, 2188 u16 port); 2189 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id); 2190 2191 /* xHCI contexts */ 2192 struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx); 2193 struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx); 2194 struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int ep_index); 2195 2196 struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci, 2197 unsigned int slot_id, unsigned int ep_index, 2198 unsigned int stream_id); 2199 2200 static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, 2201 struct urb *urb) 2202 { 2203 return xhci_triad_to_transfer_ring(xhci, urb->dev->slot_id, 2204 xhci_get_endpoint_index(&urb->ep->desc), 2205 urb->stream_id); 2206 } 2207 2208 /* 2209 * TODO: As per spec Isochronous IDT transmissions are supported. We bypass 2210 * them anyways as we where unable to find a device that matches the 2211 * constraints. 2212 */ 2213 static inline bool xhci_urb_suitable_for_idt(struct urb *urb) 2214 { 2215 if (!usb_endpoint_xfer_isoc(&urb->ep->desc) && usb_urb_dir_out(urb) && 2216 usb_endpoint_maxp(&urb->ep->desc) >= TRB_IDT_MAX_SIZE && 2217 urb->transfer_buffer_length <= TRB_IDT_MAX_SIZE && 2218 !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) && 2219 !urb->num_sgs) 2220 return true; 2221 2222 return false; 2223 } 2224 2225 static inline char *xhci_slot_state_string(u32 state) 2226 { 2227 switch (state) { 2228 case SLOT_STATE_ENABLED: 2229 return "enabled/disabled"; 2230 case SLOT_STATE_DEFAULT: 2231 return "default"; 2232 case SLOT_STATE_ADDRESSED: 2233 return "addressed"; 2234 case SLOT_STATE_CONFIGURED: 2235 return "configured"; 2236 default: 2237 return "reserved"; 2238 } 2239 } 2240 2241 static inline const char *xhci_decode_trb(char *str, size_t size, 2242 u32 field0, u32 field1, u32 field2, u32 field3) 2243 { 2244 int type = TRB_FIELD_TO_TYPE(field3); 2245 2246 switch (type) { 2247 case TRB_LINK: 2248 snprintf(str, size, 2249 "LINK %08x%08x intr %d type '%s' flags %c:%c:%c:%c", 2250 field1, field0, GET_INTR_TARGET(field2), 2251 xhci_trb_type_string(type), 2252 field3 & TRB_IOC ? 'I' : 'i', 2253 field3 & TRB_CHAIN ? 'C' : 'c', 2254 field3 & TRB_TC ? 'T' : 't', 2255 field3 & TRB_CYCLE ? 'C' : 'c'); 2256 break; 2257 case TRB_TRANSFER: 2258 case TRB_COMPLETION: 2259 case TRB_PORT_STATUS: 2260 case TRB_BANDWIDTH_EVENT: 2261 case TRB_DOORBELL: 2262 case TRB_HC_EVENT: 2263 case TRB_DEV_NOTE: 2264 case TRB_MFINDEX_WRAP: 2265 snprintf(str, size, 2266 "TRB %08x%08x status '%s' len %d slot %d ep %d type '%s' flags %c:%c", 2267 field1, field0, 2268 xhci_trb_comp_code_string(GET_COMP_CODE(field2)), 2269 EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3), 2270 /* Macro decrements 1, maybe it shouldn't?!? */ 2271 TRB_TO_EP_INDEX(field3) + 1, 2272 xhci_trb_type_string(type), 2273 field3 & EVENT_DATA ? 'E' : 'e', 2274 field3 & TRB_CYCLE ? 'C' : 'c'); 2275 2276 break; 2277 case TRB_SETUP: 2278 snprintf(str, size, 2279 "bRequestType %02x bRequest %02x wValue %02x%02x wIndex %02x%02x wLength %d length %d TD size %d intr %d type '%s' flags %c:%c:%c", 2280 field0 & 0xff, 2281 (field0 & 0xff00) >> 8, 2282 (field0 & 0xff000000) >> 24, 2283 (field0 & 0xff0000) >> 16, 2284 (field1 & 0xff00) >> 8, 2285 field1 & 0xff, 2286 (field1 & 0xff000000) >> 16 | 2287 (field1 & 0xff0000) >> 16, 2288 TRB_LEN(field2), GET_TD_SIZE(field2), 2289 GET_INTR_TARGET(field2), 2290 xhci_trb_type_string(type), 2291 field3 & TRB_IDT ? 'I' : 'i', 2292 field3 & TRB_IOC ? 'I' : 'i', 2293 field3 & TRB_CYCLE ? 'C' : 'c'); 2294 break; 2295 case TRB_DATA: 2296 snprintf(str, size, 2297 "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c", 2298 field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2), 2299 GET_INTR_TARGET(field2), 2300 xhci_trb_type_string(type), 2301 field3 & TRB_IDT ? 'I' : 'i', 2302 field3 & TRB_IOC ? 'I' : 'i', 2303 field3 & TRB_CHAIN ? 'C' : 'c', 2304 field3 & TRB_NO_SNOOP ? 'S' : 's', 2305 field3 & TRB_ISP ? 'I' : 'i', 2306 field3 & TRB_ENT ? 'E' : 'e', 2307 field3 & TRB_CYCLE ? 'C' : 'c'); 2308 break; 2309 case TRB_STATUS: 2310 snprintf(str, size, 2311 "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c", 2312 field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2), 2313 GET_INTR_TARGET(field2), 2314 xhci_trb_type_string(type), 2315 field3 & TRB_IOC ? 'I' : 'i', 2316 field3 & TRB_CHAIN ? 'C' : 'c', 2317 field3 & TRB_ENT ? 'E' : 'e', 2318 field3 & TRB_CYCLE ? 'C' : 'c'); 2319 break; 2320 case TRB_NORMAL: 2321 case TRB_ISOC: 2322 case TRB_EVENT_DATA: 2323 case TRB_TR_NOOP: 2324 snprintf(str, size, 2325 "Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c", 2326 field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2), 2327 GET_INTR_TARGET(field2), 2328 xhci_trb_type_string(type), 2329 field3 & TRB_BEI ? 'B' : 'b', 2330 field3 & TRB_IDT ? 'I' : 'i', 2331 field3 & TRB_IOC ? 'I' : 'i', 2332 field3 & TRB_CHAIN ? 'C' : 'c', 2333 field3 & TRB_NO_SNOOP ? 'S' : 's', 2334 field3 & TRB_ISP ? 'I' : 'i', 2335 field3 & TRB_ENT ? 'E' : 'e', 2336 field3 & TRB_CYCLE ? 'C' : 'c'); 2337 break; 2338 2339 case TRB_CMD_NOOP: 2340 case TRB_ENABLE_SLOT: 2341 snprintf(str, size, 2342 "%s: flags %c", 2343 xhci_trb_type_string(type), 2344 field3 & TRB_CYCLE ? 'C' : 'c'); 2345 break; 2346 case TRB_DISABLE_SLOT: 2347 case TRB_NEG_BANDWIDTH: 2348 snprintf(str, size, 2349 "%s: slot %d flags %c", 2350 xhci_trb_type_string(type), 2351 TRB_TO_SLOT_ID(field3), 2352 field3 & TRB_CYCLE ? 'C' : 'c'); 2353 break; 2354 case TRB_ADDR_DEV: 2355 snprintf(str, size, 2356 "%s: ctx %08x%08x slot %d flags %c:%c", 2357 xhci_trb_type_string(type), 2358 field1, field0, 2359 TRB_TO_SLOT_ID(field3), 2360 field3 & TRB_BSR ? 'B' : 'b', 2361 field3 & TRB_CYCLE ? 'C' : 'c'); 2362 break; 2363 case TRB_CONFIG_EP: 2364 snprintf(str, size, 2365 "%s: ctx %08x%08x slot %d flags %c:%c", 2366 xhci_trb_type_string(type), 2367 field1, field0, 2368 TRB_TO_SLOT_ID(field3), 2369 field3 & TRB_DC ? 'D' : 'd', 2370 field3 & TRB_CYCLE ? 'C' : 'c'); 2371 break; 2372 case TRB_EVAL_CONTEXT: 2373 snprintf(str, size, 2374 "%s: ctx %08x%08x slot %d flags %c", 2375 xhci_trb_type_string(type), 2376 field1, field0, 2377 TRB_TO_SLOT_ID(field3), 2378 field3 & TRB_CYCLE ? 'C' : 'c'); 2379 break; 2380 case TRB_RESET_EP: 2381 snprintf(str, size, 2382 "%s: ctx %08x%08x slot %d ep %d flags %c:%c", 2383 xhci_trb_type_string(type), 2384 field1, field0, 2385 TRB_TO_SLOT_ID(field3), 2386 /* Macro decrements 1, maybe it shouldn't?!? */ 2387 TRB_TO_EP_INDEX(field3) + 1, 2388 field3 & TRB_TSP ? 'T' : 't', 2389 field3 & TRB_CYCLE ? 'C' : 'c'); 2390 break; 2391 case TRB_STOP_RING: 2392 sprintf(str, 2393 "%s: slot %d sp %d ep %d flags %c", 2394 xhci_trb_type_string(type), 2395 TRB_TO_SLOT_ID(field3), 2396 TRB_TO_SUSPEND_PORT(field3), 2397 /* Macro decrements 1, maybe it shouldn't?!? */ 2398 TRB_TO_EP_INDEX(field3) + 1, 2399 field3 & TRB_CYCLE ? 'C' : 'c'); 2400 break; 2401 case TRB_SET_DEQ: 2402 snprintf(str, size, 2403 "%s: deq %08x%08x stream %d slot %d ep %d flags %c", 2404 xhci_trb_type_string(type), 2405 field1, field0, 2406 TRB_TO_STREAM_ID(field2), 2407 TRB_TO_SLOT_ID(field3), 2408 /* Macro decrements 1, maybe it shouldn't?!? */ 2409 TRB_TO_EP_INDEX(field3) + 1, 2410 field3 & TRB_CYCLE ? 'C' : 'c'); 2411 break; 2412 case TRB_RESET_DEV: 2413 snprintf(str, size, 2414 "%s: slot %d flags %c", 2415 xhci_trb_type_string(type), 2416 TRB_TO_SLOT_ID(field3), 2417 field3 & TRB_CYCLE ? 'C' : 'c'); 2418 break; 2419 case TRB_FORCE_EVENT: 2420 snprintf(str, size, 2421 "%s: event %08x%08x vf intr %d vf id %d flags %c", 2422 xhci_trb_type_string(type), 2423 field1, field0, 2424 TRB_TO_VF_INTR_TARGET(field2), 2425 TRB_TO_VF_ID(field3), 2426 field3 & TRB_CYCLE ? 'C' : 'c'); 2427 break; 2428 case TRB_SET_LT: 2429 snprintf(str, size, 2430 "%s: belt %d flags %c", 2431 xhci_trb_type_string(type), 2432 TRB_TO_BELT(field3), 2433 field3 & TRB_CYCLE ? 'C' : 'c'); 2434 break; 2435 case TRB_GET_BW: 2436 snprintf(str, size, 2437 "%s: ctx %08x%08x slot %d speed %d flags %c", 2438 xhci_trb_type_string(type), 2439 field1, field0, 2440 TRB_TO_SLOT_ID(field3), 2441 TRB_TO_DEV_SPEED(field3), 2442 field3 & TRB_CYCLE ? 'C' : 'c'); 2443 break; 2444 case TRB_FORCE_HEADER: 2445 snprintf(str, size, 2446 "%s: info %08x%08x%08x pkt type %d roothub port %d flags %c", 2447 xhci_trb_type_string(type), 2448 field2, field1, field0 & 0xffffffe0, 2449 TRB_TO_PACKET_TYPE(field0), 2450 TRB_TO_ROOTHUB_PORT(field3), 2451 field3 & TRB_CYCLE ? 'C' : 'c'); 2452 break; 2453 default: 2454 snprintf(str, size, 2455 "type '%s' -> raw %08x %08x %08x %08x", 2456 xhci_trb_type_string(type), 2457 field0, field1, field2, field3); 2458 } 2459 2460 return str; 2461 } 2462 2463 static inline const char *xhci_decode_ctrl_ctx(char *str, 2464 unsigned long drop, unsigned long add) 2465 { 2466 unsigned int bit; 2467 int ret = 0; 2468 2469 if (drop) { 2470 ret = sprintf(str, "Drop:"); 2471 for_each_set_bit(bit, &drop, 32) 2472 ret += sprintf(str + ret, " %d%s", 2473 bit / 2, 2474 bit % 2 ? "in":"out"); 2475 ret += sprintf(str + ret, ", "); 2476 } 2477 2478 if (add) { 2479 ret += sprintf(str + ret, "Add:%s%s", 2480 (add & SLOT_FLAG) ? " slot":"", 2481 (add & EP0_FLAG) ? " ep0":""); 2482 add &= ~(SLOT_FLAG | EP0_FLAG); 2483 for_each_set_bit(bit, &add, 32) 2484 ret += sprintf(str + ret, " %d%s", 2485 bit / 2, 2486 bit % 2 ? "in":"out"); 2487 } 2488 return str; 2489 } 2490 2491 static inline const char *xhci_decode_slot_context(char *str, 2492 u32 info, u32 info2, u32 tt_info, u32 state) 2493 { 2494 u32 speed; 2495 u32 hub; 2496 u32 mtt; 2497 int ret = 0; 2498 2499 speed = info & DEV_SPEED; 2500 hub = info & DEV_HUB; 2501 mtt = info & DEV_MTT; 2502 2503 ret = sprintf(str, "RS %05x %s%s%s Ctx Entries %d MEL %d us Port# %d/%d", 2504 info & ROUTE_STRING_MASK, 2505 ({ char *s; 2506 switch (speed) { 2507 case SLOT_SPEED_FS: 2508 s = "full-speed"; 2509 break; 2510 case SLOT_SPEED_LS: 2511 s = "low-speed"; 2512 break; 2513 case SLOT_SPEED_HS: 2514 s = "high-speed"; 2515 break; 2516 case SLOT_SPEED_SS: 2517 s = "super-speed"; 2518 break; 2519 case SLOT_SPEED_SSP: 2520 s = "super-speed plus"; 2521 break; 2522 default: 2523 s = "UNKNOWN speed"; 2524 } s; }), 2525 mtt ? " multi-TT" : "", 2526 hub ? " Hub" : "", 2527 (info & LAST_CTX_MASK) >> 27, 2528 info2 & MAX_EXIT, 2529 DEVINFO_TO_ROOT_HUB_PORT(info2), 2530 DEVINFO_TO_MAX_PORTS(info2)); 2531 2532 ret += sprintf(str + ret, " [TT Slot %d Port# %d TTT %d Intr %d] Addr %d State %s", 2533 tt_info & TT_SLOT, (tt_info & TT_PORT) >> 8, 2534 GET_TT_THINK_TIME(tt_info), GET_INTR_TARGET(tt_info), 2535 state & DEV_ADDR_MASK, 2536 xhci_slot_state_string(GET_SLOT_STATE(state))); 2537 2538 return str; 2539 } 2540 2541 2542 static inline const char *xhci_portsc_link_state_string(u32 portsc) 2543 { 2544 switch (portsc & PORT_PLS_MASK) { 2545 case XDEV_U0: 2546 return "U0"; 2547 case XDEV_U1: 2548 return "U1"; 2549 case XDEV_U2: 2550 return "U2"; 2551 case XDEV_U3: 2552 return "U3"; 2553 case XDEV_DISABLED: 2554 return "Disabled"; 2555 case XDEV_RXDETECT: 2556 return "RxDetect"; 2557 case XDEV_INACTIVE: 2558 return "Inactive"; 2559 case XDEV_POLLING: 2560 return "Polling"; 2561 case XDEV_RECOVERY: 2562 return "Recovery"; 2563 case XDEV_HOT_RESET: 2564 return "Hot Reset"; 2565 case XDEV_COMP_MODE: 2566 return "Compliance mode"; 2567 case XDEV_TEST_MODE: 2568 return "Test mode"; 2569 case XDEV_RESUME: 2570 return "Resume"; 2571 default: 2572 break; 2573 } 2574 return "Unknown"; 2575 } 2576 2577 static inline const char *xhci_decode_portsc(char *str, u32 portsc) 2578 { 2579 int ret; 2580 2581 ret = sprintf(str, "%s %s %s Link:%s PortSpeed:%d ", 2582 portsc & PORT_POWER ? "Powered" : "Powered-off", 2583 portsc & PORT_CONNECT ? "Connected" : "Not-connected", 2584 portsc & PORT_PE ? "Enabled" : "Disabled", 2585 xhci_portsc_link_state_string(portsc), 2586 DEV_PORT_SPEED(portsc)); 2587 2588 if (portsc & PORT_OC) 2589 ret += sprintf(str + ret, "OverCurrent "); 2590 if (portsc & PORT_RESET) 2591 ret += sprintf(str + ret, "In-Reset "); 2592 2593 ret += sprintf(str + ret, "Change: "); 2594 if (portsc & PORT_CSC) 2595 ret += sprintf(str + ret, "CSC "); 2596 if (portsc & PORT_PEC) 2597 ret += sprintf(str + ret, "PEC "); 2598 if (portsc & PORT_WRC) 2599 ret += sprintf(str + ret, "WRC "); 2600 if (portsc & PORT_OCC) 2601 ret += sprintf(str + ret, "OCC "); 2602 if (portsc & PORT_RC) 2603 ret += sprintf(str + ret, "PRC "); 2604 if (portsc & PORT_PLC) 2605 ret += sprintf(str + ret, "PLC "); 2606 if (portsc & PORT_CEC) 2607 ret += sprintf(str + ret, "CEC "); 2608 if (portsc & PORT_CAS) 2609 ret += sprintf(str + ret, "CAS "); 2610 2611 ret += sprintf(str + ret, "Wake: "); 2612 if (portsc & PORT_WKCONN_E) 2613 ret += sprintf(str + ret, "WCE "); 2614 if (portsc & PORT_WKDISC_E) 2615 ret += sprintf(str + ret, "WDE "); 2616 if (portsc & PORT_WKOC_E) 2617 ret += sprintf(str + ret, "WOE "); 2618 2619 return str; 2620 } 2621 2622 static inline const char *xhci_decode_usbsts(char *str, u32 usbsts) 2623 { 2624 int ret = 0; 2625 2626 if (usbsts == ~(u32)0) 2627 return " 0xffffffff"; 2628 if (usbsts & STS_HALT) 2629 ret += sprintf(str + ret, " HCHalted"); 2630 if (usbsts & STS_FATAL) 2631 ret += sprintf(str + ret, " HSE"); 2632 if (usbsts & STS_EINT) 2633 ret += sprintf(str + ret, " EINT"); 2634 if (usbsts & STS_PORT) 2635 ret += sprintf(str + ret, " PCD"); 2636 if (usbsts & STS_SAVE) 2637 ret += sprintf(str + ret, " SSS"); 2638 if (usbsts & STS_RESTORE) 2639 ret += sprintf(str + ret, " RSS"); 2640 if (usbsts & STS_SRE) 2641 ret += sprintf(str + ret, " SRE"); 2642 if (usbsts & STS_CNR) 2643 ret += sprintf(str + ret, " CNR"); 2644 if (usbsts & STS_HCE) 2645 ret += sprintf(str + ret, " HCE"); 2646 2647 return str; 2648 } 2649 2650 static inline const char *xhci_decode_doorbell(char *str, u32 slot, u32 doorbell) 2651 { 2652 u8 ep; 2653 u16 stream; 2654 int ret; 2655 2656 ep = (doorbell & 0xff); 2657 stream = doorbell >> 16; 2658 2659 if (slot == 0) { 2660 sprintf(str, "Command Ring %d", doorbell); 2661 return str; 2662 } 2663 ret = sprintf(str, "Slot %d ", slot); 2664 if (ep > 0 && ep < 32) 2665 ret = sprintf(str + ret, "ep%d%s", 2666 ep / 2, 2667 ep % 2 ? "in" : "out"); 2668 else if (ep == 0 || ep < 248) 2669 ret = sprintf(str + ret, "Reserved %d", ep); 2670 else 2671 ret = sprintf(str + ret, "Vendor Defined %d", ep); 2672 if (stream) 2673 ret = sprintf(str + ret, " Stream %d", stream); 2674 2675 return str; 2676 } 2677 2678 static inline const char *xhci_ep_state_string(u8 state) 2679 { 2680 switch (state) { 2681 case EP_STATE_DISABLED: 2682 return "disabled"; 2683 case EP_STATE_RUNNING: 2684 return "running"; 2685 case EP_STATE_HALTED: 2686 return "halted"; 2687 case EP_STATE_STOPPED: 2688 return "stopped"; 2689 case EP_STATE_ERROR: 2690 return "error"; 2691 default: 2692 return "INVALID"; 2693 } 2694 } 2695 2696 static inline const char *xhci_ep_type_string(u8 type) 2697 { 2698 switch (type) { 2699 case ISOC_OUT_EP: 2700 return "Isoc OUT"; 2701 case BULK_OUT_EP: 2702 return "Bulk OUT"; 2703 case INT_OUT_EP: 2704 return "Int OUT"; 2705 case CTRL_EP: 2706 return "Ctrl"; 2707 case ISOC_IN_EP: 2708 return "Isoc IN"; 2709 case BULK_IN_EP: 2710 return "Bulk IN"; 2711 case INT_IN_EP: 2712 return "Int IN"; 2713 default: 2714 return "INVALID"; 2715 } 2716 } 2717 2718 static inline const char *xhci_decode_ep_context(char *str, u32 info, 2719 u32 info2, u64 deq, u32 tx_info) 2720 { 2721 int ret; 2722 2723 u32 esit; 2724 u16 maxp; 2725 u16 avg; 2726 2727 u8 max_pstr; 2728 u8 ep_state; 2729 u8 interval; 2730 u8 ep_type; 2731 u8 burst; 2732 u8 cerr; 2733 u8 mult; 2734 2735 bool lsa; 2736 bool hid; 2737 2738 esit = CTX_TO_MAX_ESIT_PAYLOAD_HI(info) << 16 | 2739 CTX_TO_MAX_ESIT_PAYLOAD(tx_info); 2740 2741 ep_state = info & EP_STATE_MASK; 2742 max_pstr = CTX_TO_EP_MAXPSTREAMS(info); 2743 interval = CTX_TO_EP_INTERVAL(info); 2744 mult = CTX_TO_EP_MULT(info) + 1; 2745 lsa = !!(info & EP_HAS_LSA); 2746 2747 cerr = (info2 & (3 << 1)) >> 1; 2748 ep_type = CTX_TO_EP_TYPE(info2); 2749 hid = !!(info2 & (1 << 7)); 2750 burst = CTX_TO_MAX_BURST(info2); 2751 maxp = MAX_PACKET_DECODED(info2); 2752 2753 avg = EP_AVG_TRB_LENGTH(tx_info); 2754 2755 ret = sprintf(str, "State %s mult %d max P. Streams %d %s", 2756 xhci_ep_state_string(ep_state), mult, 2757 max_pstr, lsa ? "LSA " : ""); 2758 2759 ret += sprintf(str + ret, "interval %d us max ESIT payload %d CErr %d ", 2760 (1 << interval) * 125, esit, cerr); 2761 2762 ret += sprintf(str + ret, "Type %s %sburst %d maxp %d deq %016llx ", 2763 xhci_ep_type_string(ep_type), hid ? "HID" : "", 2764 burst, maxp, deq); 2765 2766 ret += sprintf(str + ret, "avg trb len %d", avg); 2767 2768 return str; 2769 } 2770 2771 #endif /* __LINUX_XHCI_HCD_H */ 2772