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