/* SPDX-License-Identifier: GPL-2.0 */
/*
* xHCI host controller driver
*
* Copyright (C) 2008 Intel Corp.
*
* Author: Sarah Sharp
* Some code borrowed from the Linux EHCI driver.
*/
#ifndef __LINUX_XHCI_HCD_H
#define __LINUX_XHCI_HCD_H
#include <linux/usb.h>
#include <linux/timer.h>
#include <linux/kernel.h>
#include <linux/usb/hcd.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/io-64-nonatomic-hi-lo.h>
/* Code sharing between pci-quirks and xhci hcd */
#include "xhci-ext-caps.h"
#include "pci-quirks.h"
#include "xhci-port.h"
#include "xhci-caps.h"
/* max buffer size for trace and debug messages */
#define XHCI_MSG_MAX 500
/* xHCI PCI Configuration Registers */
#define XHCI_SBRN_OFFSET (0x60)
/* Max number of USB devices for any host controller - limit in section 6.1 */
#define MAX_HC_SLOTS 256
/* Section 5.3.3 - MaxPorts */
#define MAX_HC_PORTS 127
/*
* xHCI register interface.
* This corresponds to the eXtensible Host Controller Interface (xHCI)
* Revision 0.95 specification
*/
/**
* struct xhci_cap_regs - xHCI Host Controller Capability Registers.
* @hc_capbase: length of the capabilities register and HC version number
* @hcs_params1: HCSPARAMS1 - Structural Parameters 1
* @hcs_params2: HCSPARAMS2 - Structural Parameters 2
* @hcs_params3: HCSPARAMS3 - Structural Parameters 3
* @hcc_params: HCCPARAMS - Capability Parameters
* @db_off: DBOFF - Doorbell array offset
* @run_regs_off: RTSOFF - Runtime register space offset
* @hcc_params2: HCCPARAMS2 Capability Parameters 2, xhci 1.1 only
*/
struct xhci_cap_regs {
__le32 hc_capbase;
__le32 hcs_params1;
__le32 hcs_params2;
__le32 hcs_params3;
__le32 hcc_params;
__le32 db_off;
__le32 run_regs_off;
__le32 hcc_params2; /* xhci 1.1 */
/* Reserved up to (CAPLENGTH - 0x1C) */
};
/* Number of registers per port */
#define NUM_PORT_REGS 4
#define PORTSC 0
#define PORTPMSC 1
#define PORTLI 2
#define PORTHLPMC 3
/**
* struct xhci_op_regs - xHCI Host Controller Operational Registers.
* @command: USBCMD - xHC command register
* @status: USBSTS - xHC status register
* @page_size: This indicates the page size that the host controller
* supports. If bit n is set, the HC supports a page size
* of 2^(n+12), up to a 128MB page size.
* 4K is the minimum page size.
* @cmd_ring: CRP - 64-bit Command Ring Pointer
* @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer
* @config_reg: CONFIG - Configure Register
* @port_status_base: PORTSCn - base address for Port Status and Control
* Each port has a Port Status and Control register,
* followed by a Port Power Management Status and Control
* register, a Port Link Info register, and a reserved
* register.
* @port_power_base: PORTPMSCn - base address for
* Port Power Management Status and Control
* @port_link_base: PORTLIn - base address for Port Link Info (current
* Link PM state and control) for USB 2.1 and USB 3.0
* devices.
*/
struct xhci_op_regs {
__le32 command;
__le32 status;
__le32 page_size;
__le32 reserved1;
__le32 reserved2;
__le32 dev_notification;
__le64 cmd_ring;
/* rsvd: offset 0x20-2F */
__le32 reserved3[4];
__le64 dcbaa_ptr;
__le32 config_reg;
/* rsvd: offset 0x3C-3FF */
__le32 reserved4[241];
/* port 1 registers, which serve as a base address for other ports */
__le32 port_status_base;
__le32 port_power_base;
__le32 port_link_base;
__le32 reserved5;
/* registers for ports 2-255 */
__le32 reserved6[NUM_PORT_REGS*254];
};
/* USBCMD - USB command - command bitmasks */
/* start/stop HC execution - do not write unless HC is halted*/
#define CMD_RUN XHCI_CMD_RUN
/* Reset HC - resets internal HC state machine and all registers (except
* PCI config regs). HC does NOT drive a USB reset on the downstream ports.
* The xHCI driver must reinitialize the xHC after setting this bit.
*/
#define CMD_RESET (1 << 1)
/* Event Interrupt Enable - a '1' allows interrupts from the host controller */
#define CMD_EIE XHCI_CMD_EIE
/* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
#define CMD_HSEIE XHCI_CMD_HSEIE
/* bits 4:6 are reserved (and should be preserved on writes). */
/* light reset (port status stays unchanged) - reset completed when this is 0 */
#define CMD_LRESET (1 << 7)
/* host controller save/restore state. */
#define CMD_CSS (1 << 8)
#define CMD_CRS (1 << 9)
/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
#define CMD_EWE XHCI_CMD_EWE
/* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
* hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
* '0' means the xHC can power it off if all ports are in the disconnect,
* disabled, or powered-off state.
*/
#define CMD_PM_INDEX (1 << 11)
/* bit 14 Extended TBC Enable, changes Isoc TRB fields to support larger TBC */
#define CMD_ETE (1 << 14)
/* bits 15:31 are reserved (and should be preserved on writes). */
#define XHCI_RESET_LONG_USEC (10 * 1000 * 1000)
#define XHCI_RESET_SHORT_USEC (250 * 1000)
/* IMAN - Interrupt Management Register */
#define IMAN_IE (1 << 1)
#define IMAN_IP (1 << 0)
/* USBSTS - USB status - status bitmasks */
/* HC not running - set to 1 when run/stop bit is cleared. */
#define STS_HALT XHCI_STS_HALT
/* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */
#define STS_FATAL (1 << 2)
/* event interrupt - clear this prior to clearing any IP flags in IR set*/
#define STS_EINT (1 << 3)
/* port change detect */
#define STS_PORT (1 << 4)
/* bits 5:7 reserved and zeroed */
/* save state status - '1' means xHC is saving state */
#define STS_SAVE (1 << 8)
/* restore state status - '1' means xHC is restoring state */
#define STS_RESTORE (1 << 9)
/* true: save or restore error */
#define STS_SRE (1 << 10)
/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
#define STS_CNR XHCI_STS_CNR
/* true: internal Host Controller Error - SW needs to reset and reinitialize */
#define STS_HCE (1 << 12)
/* bits 13:31 reserved and should be preserved */
/*
* DNCTRL - Device Notification Control Register - dev_notification bitmasks
* Generate a device notification event when the HC sees a transaction with a
* notification type that matches a bit set in this bit field.
*/
#define DEV_NOTE_MASK (0xffff)
#define ENABLE_DEV_NOTE(x) (1 << (x))
/* Most of the device notification types should only be used for debug.
* SW does need to pay attention to function wake notifications.
*/
#define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1)
/* CRCR - Command Ring Control Register - cmd_ring bitmasks */
/* bit 0 is the command ring cycle state */
/* stop ring operation after completion of the currently executing command */
#define CMD_RING_PAUSE (1 << 1)
/* stop ring immediately - abort the currently executing command */
#define CMD_RING_ABORT (1 << 2)
/* true: command ring is running */
#define CMD_RING_RUNNING (1 << 3)
/* bits 4:5 reserved and should be preserved */
/* Command Ring pointer - bit mask for the lower 32 bits. */
#define CMD_RING_RSVD_BITS (0x3f)
/* CONFIG - Configure Register - config_reg bitmasks */
/* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
#define MAX_DEVS(p) ((p) & 0xff)
/* bit 8: U3 Entry Enabled, assert PLC when root port enters U3, xhci 1.1 */
#define CONFIG_U3E (1 << 8)
/* bit 9: Configuration Information Enable, xhci 1.1 */
#define CONFIG_CIE (1 << 9)
/* bits 10:31 - reserved and should be preserved */
/**
* struct xhci_intr_reg - Interrupt Register Set
* @irq_pending: IMAN - Interrupt Management Register. Used to enable
* interrupts and check for pending interrupts.
* @irq_control: IMOD - Interrupt Moderation Register.
* Used to throttle interrupts.
* @erst_size: Number of segments in the Event Ring Segment Table (ERST).
* @erst_base: ERST base address.
* @erst_dequeue: Event ring dequeue pointer.
*
* Each interrupter (defined by a MSI-X vector) has an event ring and an Event
* Ring Segment Table (ERST) associated with it. The event ring is comprised of
* multiple segments of the same size. The HC places events on the ring and
* "updates the Cycle bit in the TRBs to indicate to software the current
* position of the Enqueue Pointer." The HCD (Linux) processes those events and
* updates the dequeue pointer.
*/
struct xhci_intr_reg {
__le32 irq_pending;
__le32 irq_control;
__le32 erst_size;
__le32 rsvd;
__le64 erst_base;
__le64 erst_dequeue;
};
/* irq_pending bitmasks */
#define ER_IRQ_PENDING(p) ((p) & 0x1)
/* bits 2:31 need to be preserved */
/* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
/* irq_control bitmasks */
/* Minimum interval between interrupts (in 250ns intervals). The interval
* between interrupts will be longer if there are no events on the event ring.
* Default is 4000 (1 ms).
*/
#define ER_IRQ_INTERVAL_MASK (0xffff)
/* Counter used to count down the time to the next interrupt - HW use only */
#define ER_IRQ_COUNTER_MASK (0xffff << 16)
/* erst_size bitmasks */
/* Preserve bits 16:31 of erst_size */
#define ERST_SIZE_MASK (0xffff << 16)
/* erst_base bitmasks */
#define ERST_BASE_RSVDP (GENMASK_ULL(5, 0))
/* erst_dequeue bitmasks */
/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
* where the current dequeue pointer lies. This is an optional HW hint.
*/
#define ERST_DESI_MASK (0x7)
/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
* a work queue (or delayed service routine)?
*/
#define ERST_EHB (1 << 3)
#define ERST_PTR_MASK (GENMASK_ULL(63, 4))
/**
* struct xhci_run_regs
* @microframe_index:
* MFINDEX - current microframe number
*
* Section 5.5 Host Controller Runtime Registers:
* "Software should read and write these registers using only Dword (32 bit)
* or larger accesses"
*/
struct xhci_run_regs {
__le32 microframe_index;
__le32 rsvd[7];
struct xhci_intr_reg ir_set[128];
};
/**
* struct doorbell_array
*
* Bits 0 - 7: Endpoint target
* Bits 8 - 15: RsvdZ
* Bits 16 - 31: Stream ID
*
* Section 5.6
*/
struct xhci_doorbell_array {
__le32 doorbell[256];
};
#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
#define DB_VALUE_HOST 0x00000000
#define PLT_MASK (0x03 << 6)
#define PLT_SYM (0x00 << 6)
#define PLT_ASYM_RX (0x02 << 6)
#define PLT_ASYM_TX (0x03 << 6)
/**
* struct xhci_container_ctx
* @type: Type of context. Used to calculated offsets to contained contexts.
* @size: Size of the context data
* @bytes: The raw context data given to HW
* @dma: dma address of the bytes
*
* Represents either a Device or Input context. Holds a pointer to the raw
* memory used for the context (bytes) and dma address of it (dma).
*/
struct xhci_container_ctx {
unsigned type;
#define XHCI_CTX_TYPE_DEVICE 0x1
#define XHCI_CTX_TYPE_INPUT 0x2
int size;
u8 *bytes;
dma_addr_t dma;
};
/**
* struct xhci_slot_ctx
* @dev_info: Route string, device speed, hub info, and last valid endpoint
* @dev_info2: Max exit latency for device number, root hub port number
* @tt_info: tt_info is used to construct split transaction tokens
* @dev_state: slot state and device address
*
* Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context
* structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
* reserved at the end of the slot context for HC internal use.
*/
struct xhci_slot_ctx {
__le32 dev_info;
__le32 dev_info2;
__le32 tt_info;
__le32 dev_state;
/* offset 0x10 to 0x1f reserved for HC internal use */
__le32 reserved[4];
};
/* dev_info bitmasks */
/* Route String - 0:19 */
#define ROUTE_STRING_MASK (0xfffff)
/* Device speed - values defined by PORTSC Device Speed field - 20:23 */
#define DEV_SPEED (0xf << 20)
#define GET_DEV_SPEED(n) (((n) & DEV_SPEED) >> 20)
/* bit 24 reserved */
/* Is this LS/FS device connected through a HS hub? - bit 25 */
#define DEV_MTT (0x1 << 25)
/* Set if the device is a hub - bit 26 */
#define DEV_HUB (0x1 << 26)
/* Index of the last valid endpoint context in this device context - 27:31 */
#define LAST_CTX_MASK (0x1f << 27)
#define LAST_CTX(p) ((p) << 27)
#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
#define SLOT_FLAG (1 << 0)
#define EP0_FLAG (1 << 1)
/* dev_info2 bitmasks */
/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
#define MAX_EXIT (0xffff)
/* Root hub port number that is needed to access the USB device */
#define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
#define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff)
/* Maximum number of ports under a hub device */
#define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24)
#define DEVINFO_TO_MAX_PORTS(p) (((p) & (0xff << 24)) >> 24)
/* tt_info bitmasks */
/*
* TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
* The Slot ID of the hub that isolates the high speed signaling from
* this low or full-speed device. '0' if attached to root hub port.
*/
#define TT_SLOT (0xff)
/*
* The number of the downstream facing port of the high-speed hub
* '0' if the device is not low or full speed.
*/
#define TT_PORT (0xff << 8)
#define TT_THINK_TIME(p) (((p) & 0x3) << 16)
#define GET_TT_THINK_TIME(p) (((p) & (0x3 << 16)) >> 16)
/* dev_state bitmasks */
/* USB device address - assigned by the HC */
#define DEV_ADDR_MASK (0xff)
/* bits 8:26 reserved */
/* Slot state */
#define SLOT_STATE (0x1f << 27)
#define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27)
#define SLOT_STATE_DISABLED 0
#define SLOT_STATE_ENABLED SLOT_STATE_DISABLED
#define SLOT_STATE_DEFAULT 1
#define SLOT_STATE_ADDRESSED 2
#define SLOT_STATE_CONFIGURED 3
/**
* struct xhci_ep_ctx
* @ep_info: endpoint state, streams, mult, and interval information.
* @ep_info2: information on endpoint type, max packet size, max burst size,
* error count, and whether the HC will force an event for all
* transactions.
* @deq: 64-bit ring dequeue pointer address. If the endpoint only
* defines one stream, this points to the endpoint transfer ring.
* Otherwise, it points to a stream context array, which has a
* ring pointer for each flow.
* @tx_info:
* Average TRB lengths for the endpoint ring and
* max payload within an Endpoint Service Interval Time (ESIT).
*
* Endpoint Context - section 6.2.1.2. This assumes the HC uses 32-byte context
* structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
* reserved at the end of the endpoint context for HC internal use.
*/
struct xhci_ep_ctx {
__le32 ep_info;
__le32 ep_info2;
__le64 deq;
__le32 tx_info;
/* offset 0x14 - 0x1f reserved for HC internal use */
__le32 reserved[3];
};
/* ep_info bitmasks */
/*
* Endpoint State - bits 0:2
* 0 - disabled
* 1 - running
* 2 - halted due to halt condition - ok to manipulate endpoint ring
* 3 - stopped
* 4 - TRB error
* 5-7 - reserved
*/
#define EP_STATE_MASK (0x7)
#define EP_STATE_DISABLED 0
#define EP_STATE_RUNNING 1
#define EP_STATE_HALTED 2
#define EP_STATE_STOPPED 3
#define EP_STATE_ERROR 4
#define GET_EP_CTX_STATE(ctx) (le32_to_cpu((ctx)->ep_info) & EP_STATE_MASK)
/* Mult - Max number of burtst within an interval, in EP companion desc. */
#define EP_MULT(p) (((p) & 0x3) << 8)
#define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3)
/* bits 10:14 are Max Primary Streams */
/* bit 15 is Linear Stream Array */
/* Interval - period between requests to an endpoint - 125u increments. */
#define EP_INTERVAL(p) (((p) & 0xff) << 16)
#define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff))
#define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff)
#define EP_MAXPSTREAMS_MASK (0x1f << 10)
#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK)
#define CTX_TO_EP_MAXPSTREAMS(p) (((p) & EP_MAXPSTREAMS_MASK) >> 10)
/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
#define EP_HAS_LSA (1 << 15)
/* hosts with LEC=1 use bits 31:24 as ESIT high bits. */
#define CTX_TO_MAX_ESIT_PAYLOAD_HI(p) (((p) >> 24) & 0xff)
/* ep_info2 bitmasks */
/*
* Force Event - generate transfer events for all TRBs for this endpoint
* This will tell the HC to ignore the IOC and ISP flags (for debugging only).
*/
#define FORCE_EVENT (0x1)
#define ERROR_COUNT(p) (((p) & 0x3) << 1)
#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
#define EP_TYPE(p) ((p) << 3)
#define ISOC_OUT_EP 1
#define BULK_OUT_EP 2
#define INT_OUT_EP 3
#define CTRL_EP 4
#define ISOC_IN_EP 5
#define BULK_IN_EP 6
#define INT_IN_EP 7
/* bit 6 reserved */
/* bit 7 is Host Initiate Disable - for disabling stream selection */
#define MAX_BURST(p) (((p)&0xff) << 8)
#define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff)
#define MAX_PACKET(p) (((p)&0xffff) << 16)
#define MAX_PACKET_MASK (0xffff << 16)
#define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff)
/* tx_info bitmasks */
#define EP_AVG_TRB_LENGTH(p) ((p) & 0xffff)
#define EP_MAX_ESIT_PAYLOAD_LO(p) (((p) & 0xffff) << 16)
#define EP_MAX_ESIT_PAYLOAD_HI(p) ((((p) >> 16) & 0xff) << 24)
#define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff)
/* deq bitmasks */
#define EP_CTX_CYCLE_MASK (1 << 0)
#define SCTX_DEQ_MASK (~0xfL)
/**
* struct xhci_input_control_context
* Input control context; see section 6.2.5.
*
* @drop_context: set the bit of the endpoint context you want to disable
* @add_context: set the bit of the endpoint context you want to enable
*/
struct xhci_input_control_ctx {
__le32 drop_flags;
__le32 add_flags;
__le32 rsvd2[6];
};
#define EP_IS_ADDED(ctrl_ctx, i) \
(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))
#define EP_IS_DROPPED(ctrl_ctx, i) \
(le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1)))
/* Represents everything that is needed to issue a command on the command ring.
* It's useful to pre-allocate these for commands that cannot fail due to
* out-of-memory errors, like freeing streams.
*/
struct xhci_command {
/* Input context for changing device state */
struct xhci_container_ctx *in_ctx;
u32 status;
int slot_id;
/* If completion is null, no one is waiting on this command
* and the structure can be freed after the command completes.
*/
struct completion *completion;
union xhci_trb *command_trb;
struct list_head cmd_list;
/* xHCI command response timeout in milliseconds */
unsigned int timeout_ms;
};
/* drop context bitmasks */
#define DROP_EP(x) (0x1 << x)
/* add context bitmasks */
#define ADD_EP(x) (0x1 << x)
struct xhci_stream_ctx {
/* 64-bit stream ring address, cycle state, and stream type */
__le64 stream_ring;
/* offset 0x14 - 0x1f reserved for HC internal use */
__le32 reserved[2];
};
/* Stream Context Types (section 6.4.1) - bits 3:1 of stream ctx deq ptr */
#define SCT_FOR_CTX(p) (((p) & 0x7) << 1)
/* Secondary stream array type, dequeue pointer is to a transfer ring */
#define SCT_SEC_TR 0
/* Primary stream array type, dequeue pointer is to a transfer ring */
#define SCT_PRI_TR 1
/* Dequeue pointer is for a secondary stream array (SSA) with 8 entries */
#define SCT_SSA_8 2
#define SCT_SSA_16 3
#define SCT_SSA_32 4
#define SCT_SSA_64 5
#define SCT_SSA_128 6
#define SCT_SSA_256 7
/* Assume no secondary streams for now */
struct xhci_stream_info {
struct xhci_ring **stream_rings;
/* Number of streams, including stream 0 (which drivers can't use) */
unsigned int num_streams;
/* The stream context array may be bigger than
* the number of streams the driver asked for
*/
struct xhci_stream_ctx *stream_ctx_array;
unsigned int num_stream_ctxs;
dma_addr_t ctx_array_dma;
/* For mapping physical TRB addresses to segments in stream rings */
struct radix_tree_root trb_address_map;
struct xhci_command *free_streams_command;
};
#define SMALL_STREAM_ARRAY_SIZE 256
#define MEDIUM_STREAM_ARRAY_SIZE 1024
/* Some Intel xHCI host controllers need software to keep track of the bus
* bandwidth. Keep track of endpoint info here. Each root port is allocated
* the full bus bandwidth. We must also treat TTs (including each port under a
* multi-TT hub) as a separate bandwidth domain. The direct memory interface
* (DMI) also limits the total bandwidth (across all domains) that can be used.
*/
struct xhci_bw_info {
/* ep_interval is zero-based */
unsigned int ep_interval;
/* mult and num_packets are one-based */
unsigned int mult;
unsigned int num_packets;
unsigned int max_packet_size;
unsigned int max_esit_payload;
unsigned int type;
};
/* "Block" sizes in bytes the hardware uses for different device speeds.
* The logic in this part of the hardware limits the number of bits the hardware
* can use, so must represent bandwidth in a less precise manner to mimic what
* the scheduler hardware computes.
*/
#define FS_BLOCK 1
#define HS_BLOCK 4
#define SS_BLOCK 16
#define DMI_BLOCK 32
/* Each device speed has a protocol overhead (CRC, bit stuffing, etc) associated
* with each byte transferred. SuperSpeed devices have an initial overhead to
* set up bursts. These are in blocks, see above. LS overhead has already been
* translated into FS blocks.
*/
#define DMI_OVERHEAD 8
#define DMI_OVERHEAD_BURST 4
#define SS_OVERHEAD 8
#define SS_OVERHEAD_BURST 32
#define HS_OVERHEAD 26
#define FS_OVERHEAD 20
#define LS_OVERHEAD 128
/* The TTs need to claim roughly twice as much bandwidth (94 bytes per
* microframe ~= 24Mbps) of the HS bus as the devices can actually use because
* of overhead associated with split transfers crossing microframe boundaries.
* 31 blocks is pure protocol overhead.
*/
#define TT_HS_OVERHEAD (31 + 94)
#define TT_DMI_OVERHEAD (25 + 12)
/* Bandwidth limits in blocks */
#define FS_BW_LIMIT 1285
#define TT_BW_LIMIT 1320
#define HS_BW_LIMIT 1607
#define SS_BW_LIMIT_IN 3906
#define DMI_BW_LIMIT_IN 3906
#define SS_BW_LIMIT_OUT 3906
#define DMI_BW_LIMIT_OUT 3906
/* Percentage of bus bandwidth reserved for non-periodic transfers */
#define FS_BW_RESERVED 10
#define HS_BW_RESERVED 20
#define SS_BW_RESERVED 10
struct xhci_virt_ep {
struct xhci_virt_device *vdev; /* parent */
unsigned int ep_index;
struct xhci_ring *ring;
/* Related to endpoints that are configured to use stream IDs only */
struct xhci_stream_info *stream_info;
/* Temporary storage in case the configure endpoint command fails and we
* have to restore the device state to the previous state
*/
struct xhci_ring *new_ring;
unsigned int err_count;
unsigned int ep_state;
#define SET_DEQ_PENDING (1 << 0)
#define EP_HALTED (1 << 1) /* For stall handling */
#define EP_STOP_CMD_PENDING (1 << 2) /* For URB cancellation */
/* Transitioning the endpoint to using streams, don't enqueue URBs */
#define EP_GETTING_STREAMS (1 << 3)
#define EP_HAS_STREAMS (1 << 4)
/* Transitioning the endpoint to not using streams, don't enqueue URBs */
#define EP_GETTING_NO_STREAMS (1 << 5)
#define EP_HARD_CLEAR_TOGGLE (1 << 6)
#define EP_SOFT_CLEAR_TOGGLE (1 << 7)
/* usb_hub_clear_tt_buffer is in progress */
#define EP_CLEARING_TT (1 << 8)
/* ---- Related to URB cancellation ---- */
struct list_head cancelled_td_list;
struct xhci_hcd *xhci;
/* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue
* command. We'll need to update the ring's dequeue segment and dequeue
* pointer after the command completes.
*/
struct xhci_segment *queued_deq_seg;
union xhci_trb *queued_deq_ptr;
/*
* Sometimes the xHC can not process isochronous endpoint ring quickly
* enough, and it will miss some isoc tds on the ring and generate
* a Missed Service Error Event.
* Set skip flag when receive a Missed Service Error Event and
* process the missed tds on the endpoint ring.
*/
bool skip;
/* Bandwidth checking storage */
struct xhci_bw_info bw_info;
struct list_head bw_endpoint_list;
/* Isoch Frame ID checking storage */
int next_frame_id;
/* Use new Isoch TRB layout needed for extended TBC support */
bool use_extended_tbc;
};
enum xhci_overhead_type {
LS_OVERHEAD_TYPE = 0,
FS_OVERHEAD_TYPE,
HS_OVERHEAD_TYPE,
};
struct xhci_interval_bw {
unsigned int num_packets;
/* Sorted by max packet size.
* Head of the list is the greatest max packet size.
*/
struct list_head endpoints;
/* How many endpoints of each speed are present. */
unsigned int overhead[3];
};
#define XHCI_MAX_INTERVAL 16
struct xhci_interval_bw_table {
unsigned int interval0_esit_payload;
struct xhci_interval_bw interval_bw[XHCI_MAX_INTERVAL];
/* Includes reserved bandwidth for async endpoints */
unsigned int bw_used;
unsigned int ss_bw_in;
unsigned int ss_bw_out;
};
#define EP_CTX_PER_DEV 31
struct xhci_virt_device {
int slot_id;
struct usb_device *udev;
/*
* Commands to the hardware are passed an "input context" that
* tells the hardware what to change in its data structures.
* The hardware will return changes in an "output context" that
* software must allocate for the hardware. We need to keep
* track of input and output contexts separately because
* these commands might fail and we don't trust the hardware.
*/
struct xhci_container_ctx *out_ctx;
/* Used for addressing devices and configuration changes */
struct xhci_container_ctx *in_ctx;
struct xhci_virt_ep eps[EP_CTX_PER_DEV];
struct xhci_port *rhub_port;
struct xhci_interval_bw_table *bw_table;
struct xhci_tt_bw_info *tt_info;
/*
* flags for state tracking based on events and issued commands.
* Software can not rely on states from output contexts because of
* latency between events and xHC updating output context values.
* See xhci 1.1 section 4.8.3 for more details
*/
unsigned long flags;
#define VDEV_PORT_ERROR BIT(0) /* Port error, link inactive */
/* The current max exit latency for the enabled USB3 link states. */
u16 current_mel;
/* Used for the debugfs interfaces. */
void *debugfs_private;
};
/*
* For each roothub, keep track of the bandwidth information for each periodic
* interval.
*
* If a high speed hub is attached to the roothub, each TT associated with that
* hub is a separate bandwidth domain. The interval information for the
* endpoints on the devices under that TT will appear in the TT structure.
*/
struct xhci_root_port_bw_info {
struct list_head tts;
unsigned int num_active_tts;
struct xhci_interval_bw_table bw_table;
};
struct xhci_tt_bw_info {
struct list_head tt_list;
int slot_id;
int ttport;
struct xhci_interval_bw_table bw_table;
int active_eps;
};
/**
* struct xhci_device_context_array
* @dev_context_ptr array of 64-bit DMA addresses for device contexts
*/
struct xhci_device_context_array {
/* 64-bit device addresses; we only write 32-bit addresses */
__le64 dev_context_ptrs[MAX_HC_SLOTS];
/* private xHCD pointers */
dma_addr_t dma;
};
/* TODO: write function to set the 64-bit device DMA address */
/*
* TODO: change this to be dynamically sized at HC mem init time since the HC
* might not be able to handle the maximum number of devices possible.
*/
struct xhci_transfer_event {
/* 64-bit buffer address, or immediate data */
__le64 buffer;
__le32 transfer_len;
/* This field is interpreted differently based on the type of TRB */
__le32 flags;
};
/* Transfer event flags bitfield, also for select command completion events */
#define TRB_TO_SLOT_ID(p) (((p) >> 24) & 0xff)
#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
#define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f) /* Endpoint ID 1 - 31 */
#define EP_ID_FOR_TRB(p) (((p) & 0x1f) << 16)
#define TRB_TO_EP_INDEX(p) (TRB_TO_EP_ID(p) - 1) /* Endpoint index 0 - 30 */
#define EP_INDEX_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
/* Transfer event TRB length bit mask */
#define EVENT_TRB_LEN(p) ((p) & 0xffffff)
/* Completion Code - only applicable for some types of TRBs */
#define COMP_CODE_MASK (0xff << 24)
#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
#define COMP_INVALID 0
#define COMP_SUCCESS 1
#define COMP_DATA_BUFFER_ERROR 2
#define COMP_BABBLE_DETECTED_ERROR 3
#define COMP_USB_TRANSACTION_ERROR 4
#define COMP_TRB_ERROR 5
#define COMP_STALL_ERROR 6
#define COMP_RESOURCE_ERROR 7
#define COMP_BANDWIDTH_ERROR 8
#define COMP_NO_SLOTS_AVAILABLE_ERROR 9
#define COMP_INVALID_STREAM_TYPE_ERROR 10
#define COMP_SLOT_NOT_ENABLED_ERROR 11
#define COMP_ENDPOINT_NOT_ENABLED_ERROR 12
#define COMP_SHORT_PACKET 13
#define COMP_RING_UNDERRUN 14
#define COMP_RING_OVERRUN 15
#define COMP_VF_EVENT_RING_FULL_ERROR 16
#define COMP_PARAMETER_ERROR 17
#define COMP_BANDWIDTH_OVERRUN_ERROR 18
#define COMP_CONTEXT_STATE_ERROR 19
#define COMP_NO_PING_RESPONSE_ERROR 20
#define COMP_EVENT_RING_FULL_ERROR 21
#define COMP_INCOMPATIBLE_DEVICE_ERROR 22
#define COMP_MISSED_SERVICE_ERROR 23
#define COMP_COMMAND_RING_STOPPED 24
#define COMP_COMMAND_ABORTED 25
#define COMP_STOPPED 26
#define COMP_STOPPED_LENGTH_INVALID 27
#define COMP_STOPPED_SHORT_PACKET 28
#define COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR 29
#define COMP_ISOCH_BUFFER_OVERRUN 31
#define COMP_EVENT_LOST_ERROR 32
#define COMP_UNDEFINED_ERROR 33
#define COMP_INVALID_STREAM_ID_ERROR 34
#define COMP_SECONDARY_BANDWIDTH_ERROR 35
#define COMP_SPLIT_TRANSACTION_ERROR 36
static inline const char *xhci_trb_comp_code_string(u8 status)
{
switch (status) {
case COMP_INVALID:
return "Invalid";
case COMP_SUCCESS:
return "Success";
case COMP_DATA_BUFFER_ERROR:
return "Data Buffer Error";
case COMP_BABBLE_DETECTED_ERROR:
return "Babble Detected";
case COMP_USB_TRANSACTION_ERROR:
return "USB Transaction Error";
case COMP_TRB_ERROR:
return "TRB Error";
case COMP_STALL_ERROR:
return "Stall Error";
case COMP_RESOURCE_ERROR:
return "Resource Error";
case COMP_BANDWIDTH_ERROR:
return "Bandwidth Error";
case COMP_NO_SLOTS_AVAILABLE_ERROR:
return "No Slots Available Error";
case COMP_INVALID_STREAM_TYPE_ERROR:
return "Invalid Stream Type Error";
case COMP_SLOT_NOT_ENABLED_ERROR:
return "Slot Not Enabled Error";
case COMP_ENDPOINT_NOT_ENABLED_ERROR:
return "Endpoint Not Enabled Error";
case COMP_SHORT_PACKET:
return "Short Packet";
case COMP_RING_UNDERRUN:
return "Ring Underrun";
case COMP_RING_OVERRUN:
return "Ring Overrun";
case COMP_VF_EVENT_RING_FULL_ERROR:
return "VF Event Ring Full Error";
case COMP_PARAMETER_ERROR:
return "Parameter Error";
case COMP_BANDWIDTH_OVERRUN_ERROR:
return "Bandwidth Overrun Error";
case COMP_CONTEXT_STATE_ERROR:
return "Context State Error";
case COMP_NO_PING_RESPONSE_ERROR:
return "No Ping Response Error";
case COMP_EVENT_RING_FULL_ERROR:
return "Event Ring Full Error";
case COMP_INCOMPATIBLE_DEVICE_ERROR:
return "Incompatible Device Error";
case COMP_MISSED_SERVICE_ERROR:
return "Missed Service Error";
case COMP_COMMAND_RING_STOPPED:
return "Command Ring Stopped";
case COMP_COMMAND_ABORTED:
return "Command Aborted";
case COMP_STOPPED:
return "Stopped";
case COMP_STOPPED_LENGTH_INVALID:
return "Stopped - Length Invalid";
case COMP_STOPPED_SHORT_PACKET:
return "Stopped - Short Packet";
case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR:
return "Max Exit Latency Too Large Error";
case COMP_ISOCH_BUFFER_OVERRUN:
return "Isoch Buffer Overrun";
case COMP_EVENT_LOST_ERROR:
return "Event Lost Error";
case COMP_UNDEFINED_ERROR:
return "Undefined Error";
case COMP_INVALID_STREAM_ID_ERROR:
return "Invalid Stream ID Error";
case COMP_SECONDARY_BANDWIDTH_ERROR:
return "Secondary Bandwidth Error";
case COMP_SPLIT_TRANSACTION_ERROR:
return "Split Transaction Error";
default:
return "Unknown!!";
}
}
struct xhci_link_trb {
/* 64-bit segment pointer*/
__le64 segment_ptr;
__le32 intr_target;
__le32 control;
};
/* control bitfields */
#define LINK_TOGGLE (0x1<<1)
/* Command completion event TRB */
struct xhci_event_cmd {
/* Pointer to command TRB, or the value passed by the event data trb */
__le64 cmd_trb;
__le32 status;
__le32 flags;
};
/* Address device - disable SetAddress */
#define TRB_BSR (1<<9)
/* Configure Endpoint - Deconfigure */
#define TRB_DC (1<<9)
/* Stop Ring - Transfer State Preserve */
#define TRB_TSP (1<<9)
enum xhci_ep_reset_type {
EP_HARD_RESET,
EP_SOFT_RESET,
};
/* Force Event */
#define TRB_TO_VF_INTR_TARGET(p) (((p) & (0x3ff << 22)) >> 22)
#define TRB_TO_VF_ID(p) (((p) & (0xff << 16)) >> 16)
/* Set Latency Tolerance Value */
#define TRB_TO_BELT(p) (((p) & (0xfff << 16)) >> 16)
/* Get Port Bandwidth */
#define TRB_TO_DEV_SPEED(p) (((p) & (0xf << 16)) >> 16)
/* Force Header */
#define TRB_TO_PACKET_TYPE(p) ((p) & 0x1f)
#define TRB_TO_ROOTHUB_PORT(p) (((p) & (0xff << 24)) >> 24)
enum xhci_setup_dev {
SETUP_CONTEXT_ONLY,
SETUP_CONTEXT_ADDRESS,
};
/* bits 16:23 are the virtual function ID */
/* bits 24:31 are the slot ID */
/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
#define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23)
#define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23)
#define LAST_EP_INDEX 30
/* Set TR Dequeue Pointer command TRB fields, 6.4.3.9 */
#define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16))
#define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16)
#define SCT_FOR_TRB(p) (((p) << 1) & 0x7)
/* Link TRB specific fields */
#define TRB_TC (1<<1)
/* Port Status Change Event TRB fields */
/* Port ID - bits 31:24 */
#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
#define EVENT_DATA (1 << 2)
/* Normal TRB fields */
/* transfer_len bitmasks - bits 0:16 */
#define TRB_LEN(p) ((p) & 0x1ffff)
/* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31) */
#define TRB_TD_SIZE(p) (min((p), (u32)31) << 17)
#define GET_TD_SIZE(p) (((p) & 0x3e0000) >> 17)
/* xhci 1.1 uses the TD_SIZE field for TBC if Extended TBC is enabled (ETE) */
#define TRB_TD_SIZE_TBC(p) (min((p), (u32)31) << 17)
/* Interrupter Target - which MSI-X vector to target the completion event at */
#define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
#define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
/* Total burst count field, Rsvdz on xhci 1.1 with Extended TBC enabled (ETE) */
#define TRB_TBC(p) (((p) & 0x3) << 7)
#define TRB_TLBPC(p) (((p) & 0xf) << 16)
/* Cycle bit - indicates TRB ownership by HC or HCD */
#define TRB_CYCLE (1<<0)
/*
* Force next event data TRB to be evaluated before task switch.
* Used to pass OS data back after a TD completes.
*/
#define TRB_ENT (1<<1)
/* Interrupt on short packet */
#define TRB_ISP (1<<2)
/* Set PCIe no snoop attribute */
#define TRB_NO_SNOOP (1<<3)
/* Chain multiple TRBs into a TD */
#define TRB_CHAIN (1<<4)
/* Interrupt on completion */
#define TRB_IOC (1<<5)
/* The buffer pointer contains immediate data */
#define TRB_IDT (1<<6)
/* TDs smaller than this might use IDT */
#define TRB_IDT_MAX_SIZE 8
/* Block Event Interrupt */
#define TRB_BEI (1<<9)
/* Control transfer TRB specific fields */
#define TRB_DIR_IN (1<<16)
#define TRB_TX_TYPE(p) ((p) << 16)
#define TRB_DATA_OUT 2
#define TRB_DATA_IN 3
/* Isochronous TRB specific fields */
#define TRB_SIA (1<<31)
#define TRB_FRAME_ID(p) (((p) & 0x7ff) << 20)
/* TRB cache size for xHC with TRB cache */
#define TRB_CACHE_SIZE_HS 8
#define TRB_CACHE_SIZE_SS 16
struct xhci_generic_trb {
__le32 field[4];
};
union xhci_trb {
struct xhci_link_trb link;
struct xhci_transfer_event trans_event;
struct xhci_event_cmd event_cmd;
struct xhci_generic_trb generic;
};
/* TRB bit mask */
#define TRB_TYPE_BITMASK (0xfc00)
#define TRB_TYPE(p) ((p) << 10)
#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
/* TRB type IDs */
/* bulk, interrupt, isoc scatter/gather, and control data stage */
#define TRB_NORMAL 1
/* setup stage for control transfers */
#define TRB_SETUP 2
/* data stage for control transfers */
#define TRB_DATA 3
/* status stage for control transfers */
#define TRB_STATUS 4
/* isoc transfers */
#define TRB_ISOC 5
/* TRB for linking ring segments */
#define TRB_LINK 6
#define TRB_EVENT_DATA 7
/* Transfer Ring No-op (not for the command ring) */
#define TRB_TR_NOOP 8
/* Command TRBs */
/* Enable Slot Command */
#define TRB_ENABLE_SLOT 9
/* Disable Slot Command */
#define TRB_DISABLE_SLOT 10
/* Address Device Command */
#define TRB_ADDR_DEV 11
/* Configure Endpoint Command */
#define TRB_CONFIG_EP 12
/* Evaluate Context Command */
#define TRB_EVAL_CONTEXT 13
/* Reset Endpoint Command */
#define TRB_RESET_EP 14
/* Stop Transfer Ring Command */
#define TRB_STOP_RING 15
/* Set Transfer Ring Dequeue Pointer Command */
#define TRB_SET_DEQ 16
/* Reset Device Command */
#define TRB_RESET_DEV 17
/* Force Event Command (opt) */
#define TRB_FORCE_EVENT 18
/* Negotiate Bandwidth Command (opt) */
#define TRB_NEG_BANDWIDTH 19
/* Set Latency Tolerance Value Command (opt) */
#define TRB_SET_LT 20
/* Get port bandwidth Command */
#define TRB_GET_BW 21
/* Force Header Command - generate a transaction or link management packet */
#define TRB_FORCE_HEADER 22
/* No-op Command - not for transfer rings */
#define TRB_CMD_NOOP 23
/* TRB IDs 24-31 reserved */
/* Event TRBS */
/* Transfer Event */
#define TRB_TRANSFER 32
/* Command Completion Event */
#define TRB_COMPLETION 33
/* Port Status Change Event */
#define TRB_PORT_STATUS 34
/* Bandwidth Request Event (opt) */
#define TRB_BANDWIDTH_EVENT 35
/* Doorbell Event (opt) */
#define TRB_DOORBELL 36
/* Host Controller Event */
#define TRB_HC_EVENT 37
/* Device Notification Event - device sent function wake notification */
#define TRB_DEV_NOTE 38
/* MFINDEX Wrap Event - microframe counter wrapped */
#define TRB_MFINDEX_WRAP 39
/* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
#define TRB_VENDOR_DEFINED_LOW 48
/* Nec vendor-specific command completion event. */
#define TRB_NEC_CMD_COMP 48
/* Get NEC firmware revision. */
#define TRB_NEC_GET_FW 49
static inline const char *xhci_trb_type_string(u8 type)
{
switch (type) {
case TRB_NORMAL:
return "Normal";
case TRB_SETUP:
return "Setup Stage";
case TRB_DATA:
return "Data Stage";
case TRB_STATUS:
return "Status Stage";
case TRB_ISOC:
return "Isoch";
case TRB_LINK:
return "Link";
case TRB_EVENT_DATA:
return "Event Data";
case TRB_TR_NOOP:
return "No-Op";
case TRB_ENABLE_SLOT:
return "Enable Slot Command";
case TRB_DISABLE_SLOT:
return "Disable Slot Command";
case TRB_ADDR_DEV:
return "Address Device Command";
case TRB_CONFIG_EP:
return "Configure Endpoint Command";
case TRB_EVAL_CONTEXT:
return "Evaluate Context Command";
case TRB_RESET_EP:
return "Reset Endpoint Command";
case TRB_STOP_RING:
return "Stop Ring Command";
case TRB_SET_DEQ:
return "Set TR Dequeue Pointer Command";
case TRB_RESET_DEV:
return "Reset Device Command";
case TRB_FORCE_EVENT:
return "Force Event Command";
case TRB_NEG_BANDWIDTH:
return "Negotiate Bandwidth Command";
case TRB_SET_LT:
return "Set Latency Tolerance Value Command";
case TRB_GET_BW:
return "Get Port Bandwidth Command";
case TRB_FORCE_HEADER:
return "Force Header Command";
case TRB_CMD_NOOP:
return "No-Op Command";
case TRB_TRANSFER:
return "Transfer Event";
case TRB_COMPLETION:
return "Command Completion Event";
case TRB_PORT_STATUS:
return "Port Status Change Event";
case TRB_BANDWIDTH_EVENT:
return "Bandwidth Request Event";
case TRB_DOORBELL:
return "Doorbell Event";
case TRB_HC_EVENT:
return "Host Controller Event";
case TRB_DEV_NOTE:
return "Device Notification Event";
case TRB_MFINDEX_WRAP:
return "MFINDEX Wrap Event";
case TRB_NEC_CMD_COMP:
return "NEC Command Completion Event";
case TRB_NEC_GET_FW:
return "NET Get Firmware Revision Command";
default:
return "UNKNOWN";
}
}
#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
/* Above, but for __le32 types -- can avoid work by swapping constants: */
#define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
cpu_to_le32(TRB_TYPE(TRB_LINK)))
#define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
#define NEC_FW_MINOR(p) (((p) >> 0) & 0xff)
#define NEC_FW_MAJOR(p) (((p) >> 8) & 0xff)
/*
* TRBS_PER_SEGMENT must be a multiple of 4,
* since the command ring is 64-byte aligned.
* It must also be greater than 16.
*/
#define TRBS_PER_SEGMENT 256
/* Allow two commands + a link TRB, along with any reserved command TRBs */
#define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3)
#define TRB_SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
#define TRB_SEGMENT_SHIFT (ilog2(TRB_SEGMENT_SIZE))
/* TRB buffer pointers can't cross 64KB boundaries */
#define TRB_MAX_BUFF_SHIFT 16
#define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
/* How much data is left before the 64KB boundary? */
#define TRB_BUFF_LEN_UP_TO_BOUNDARY(addr) (TRB_MAX_BUFF_SIZE - \
(addr & (TRB_MAX_BUFF_SIZE - 1)))
#define MAX_SOFT_RETRY 3
/*
* Limits of consecutive isoc trbs that can Block Event Interrupt (BEI) if
* XHCI_AVOID_BEI quirk is in use.
*/
#define AVOID_BEI_INTERVAL_MIN 8
#define AVOID_BEI_INTERVAL_MAX 32
struct xhci_segment {
union xhci_trb *trbs;
/* private to HCD */
struct xhci_segment *next;
unsigned int num;
dma_addr_t dma;
/* Max packet sized bounce buffer for td-fragmant alignment */
dma_addr_t bounce_dma;
void *bounce_buf;
unsigned int bounce_offs;
unsigned int bounce_len;
};
enum xhci_cancelled_td_status {
TD_DIRTY = 0,
TD_HALTED,
TD_CLEARING_CACHE,
TD_CLEARING_CACHE_DEFERRED,
TD_CLEARED,
};
struct xhci_td {
struct list_head td_list;
struct list_head cancelled_td_list;
int status;
enum xhci_cancelled_td_status cancel_status;
struct urb *urb;
struct xhci_segment *start_seg;
union xhci_trb *first_trb;
union xhci_trb *last_trb;
struct xhci_segment *last_trb_seg;
struct xhci_segment *bounce_seg;
/* actual_length of the URB has already been set */
bool urb_length_set;
bool error_mid_td;
};
/*
* xHCI command default timeout value in milliseconds.
* USB 3.2 spec, section 9.2.6.1
*/
#define XHCI_CMD_DEFAULT_TIMEOUT 5000
/* command descriptor */
struct xhci_cd {
struct xhci_command *command;
union xhci_trb *cmd_trb;
};
enum xhci_ring_type {
TYPE_CTRL = 0,
TYPE_ISOC,
TYPE_BULK,
TYPE_INTR,
TYPE_STREAM,
TYPE_COMMAND,
TYPE_EVENT,
};
static inline const char *xhci_ring_type_string(enum xhci_ring_type type)
{
switch (type) {
case TYPE_CTRL:
return "CTRL";
case TYPE_ISOC:
return "ISOC";
case TYPE_BULK:
return "BULK";
case TYPE_INTR:
return "INTR";
case TYPE_STREAM:
return "STREAM";
case TYPE_COMMAND:
return "CMD";
case TYPE_EVENT:
return "EVENT";
}
return "UNKNOWN";
}
struct xhci_ring {
struct xhci_segment *first_seg;
struct xhci_segment *last_seg;
union xhci_trb *enqueue;
struct xhci_segment *enq_seg;
union xhci_trb *dequeue;
struct xhci_segment *deq_seg;
struct list_head td_list;
/*
* Write the cycle state into the TRB cycle field to give ownership of
* the TRB to the host controller (if we are the producer), or to check
* if we own the TRB (if we are the consumer). See section 4.9.1.
*/
u32 cycle_state;
unsigned int stream_id;
unsigned int num_segs;
unsigned int num_trbs_free; /* used only by xhci DbC */
unsigned int bounce_buf_len;
enum xhci_ring_type type;
bool last_td_was_short;
struct radix_tree_root *trb_address_map;
};
struct xhci_erst_entry {
/* 64-bit event ring segment address */
__le64 seg_addr;
__le32 seg_size;
/* Set to zero */
__le32 rsvd;
};
struct xhci_erst {
struct xhci_erst_entry *entries;
unsigned int num_entries;
/* xhci->event_ring keeps track of segment dma addresses */
dma_addr_t erst_dma_addr;
};
struct xhci_scratchpad {
u64 *sp_array;
dma_addr_t sp_dma;
void **sp_buffers;
};
struct urb_priv {
int num_tds;
int num_tds_done;
struct xhci_td td[] __counted_by(num_tds);
};
/* Number of Event Ring segments to allocate, when amount is not specified. (spec allows 32k) */
#define ERST_DEFAULT_SEGS 2
/* Poll every 60 seconds */
#define POLL_TIMEOUT 60
/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
#define XHCI_STOP_EP_CMD_TIMEOUT 5
/* XXX: Make these module parameters */
struct s3_save {
u32 command;
u32 dev_nt;
u64 dcbaa_ptr;
u32 config_reg;
};
/* Use for lpm */
struct dev_info {
u32 dev_id;
struct list_head list;
};
struct xhci_bus_state {
unsigned long bus_suspended;
unsigned long next_statechange;
/* Port suspend arrays are indexed by the portnum of the fake roothub */
/* ports suspend status arrays - max 31 ports for USB2, 15 for USB3 */
u32 port_c_suspend;
u32 suspended_ports;
u32 port_remote_wakeup;
/* which ports have started to resume */
unsigned long resuming_ports;
};
struct xhci_interrupter {
struct xhci_ring *event_ring;
struct xhci_erst erst;
struct xhci_intr_reg __iomem *ir_set;
unsigned int intr_num;
bool ip_autoclear;
u32 isoc_bei_interval;
/* For interrupter registers save and restore over suspend/resume */
u32 s3_irq_pending;
u32 s3_irq_control;
u32 s3_erst_size;
u64 s3_erst_base;
u64 s3_erst_dequeue;
};
/*
* It can take up to 20 ms to transition from RExit to U0 on the
* Intel Lynx Point LP xHCI host.
*/
#define XHCI_MAX_REXIT_TIMEOUT_MS 20
struct xhci_port_cap {
u32 *psi; /* array of protocol speed ID entries */
u8 psi_count;
u8 psi_uid_count;
u8 maj_rev;
u8 min_rev;
u32 protocol_caps;
};
struct xhci_port {
__le32 __iomem *addr;
int hw_portnum;
int hcd_portnum;
struct xhci_hub *rhub;
struct xhci_port_cap *port_cap;
unsigned int lpm_incapable:1;
unsigned long resume_timestamp;
bool rexit_active;
/* Slot ID is the index of the device directly connected to the port */
int slot_id;
struct completion rexit_done;
struct completion u3exit_done;
};
struct xhci_hub {
struct xhci_port **ports;
unsigned int num_ports;
struct usb_hcd *hcd;
/* keep track of bus suspend info */
struct xhci_bus_state bus_state;
/* supported prococol extended capabiliy values */
u8 maj_rev;
u8 min_rev;
};
/* There is one xhci_hcd structure per controller */
struct xhci_hcd {
struct usb_hcd *main_hcd;
struct usb_hcd *shared_hcd;
/* glue to PCI and HCD framework */
struct xhci_cap_regs __iomem *cap_regs;
struct xhci_op_regs __iomem *op_regs;
struct xhci_run_regs __iomem *run_regs;
struct xhci_doorbell_array __iomem *dba;
/* Cached register copies of read-only HC data */
__u32 hcs_params1;
__u32 hcs_params2;
__u32 hcs_params3;
__u32 hcc_params;
__u32 hcc_params2;
spinlock_t lock;
/* packed release number */
u16 hci_version;
u16 max_interrupters;
/* imod_interval in ns (I * 250ns) */
u32 imod_interval;
/* 4KB min, 128MB max */
int page_size;
/* Valid values are 12 to 20, inclusive */
int page_shift;
/* MSI-X/MSI vectors */
int nvecs;
/* optional clocks */
struct clk *clk;
struct clk *reg_clk;
/* optional reset controller */
struct reset_control *reset;
/* data structures */
struct xhci_device_context_array *dcbaa;
struct xhci_interrupter **interrupters;
struct xhci_ring *cmd_ring;
unsigned int cmd_ring_state;
#define CMD_RING_STATE_RUNNING (1 << 0)
#define CMD_RING_STATE_ABORTED (1 << 1)
#define CMD_RING_STATE_STOPPED (1 << 2)
struct list_head cmd_list;
unsigned int cmd_ring_reserved_trbs;
struct delayed_work cmd_timer;
struct completion cmd_ring_stop_completion;
struct xhci_command *current_cmd;
/* Scratchpad */
struct xhci_scratchpad *scratchpad;
/* slot enabling and address device helpers */
/* these are not thread safe so use mutex */
struct mutex mutex;
/* Internal mirror of the HW's dcbaa */
struct xhci_virt_device *devs[MAX_HC_SLOTS];
/* For keeping track of bandwidth domains per roothub. */
struct xhci_root_port_bw_info *rh_bw;
/* DMA pools */
struct dma_pool *device_pool;
struct dma_pool *segment_pool;
struct dma_pool *small_streams_pool;
struct dma_pool *medium_streams_pool;
/* Host controller watchdog timer structures */
unsigned int xhc_state;
unsigned long run_graceperiod;
struct s3_save s3;
/* Host controller is dying - not responding to commands. "I'm not dead yet!"
*
* xHC interrupts have been disabled and a watchdog timer will (or has already)
* halt the xHCI host, and complete all URBs with an -ESHUTDOWN code. Any code
* that sees this status (other than the timer that set it) should stop touching
* hardware immediately. Interrupt handlers should return immediately when
* they see this status (any time they drop and re-acquire xhci->lock).
* xhci_urb_dequeue() should call usb_hcd_check_unlink_urb() and return without
* putting the TD on the canceled list, etc.
*
* There are no reports of xHCI host controllers that display this issue.
*/
#define XHCI_STATE_DYING (1 << 0)
#define XHCI_STATE_HALTED (1 << 1)
#define XHCI_STATE_REMOVING (1 << 2)
unsigned long long quirks;
#define XHCI_LINK_TRB_QUIRK BIT_ULL(0)
#define XHCI_RESET_EP_QUIRK BIT_ULL(1) /* Deprecated */
#define XHCI_NEC_HOST BIT_ULL(2)
#define XHCI_AMD_PLL_FIX BIT_ULL(3)
#define XHCI_SPURIOUS_SUCCESS BIT_ULL(4)
/*
* Certain Intel host controllers have a limit to the number of endpoint
* contexts they can handle. Ideally, they would signal that they can't handle
* anymore endpoint contexts by returning a Resource Error for the Configure
* Endpoint command, but they don't. Instead they expect software to keep track
* of the number of active endpoints for them, across configure endpoint
* commands, reset device commands, disable slot commands, and address device
* commands.
*/
#define XHCI_EP_LIMIT_QUIRK BIT_ULL(5)
#define XHCI_BROKEN_MSI BIT_ULL(6)
#define XHCI_RESET_ON_RESUME BIT_ULL(7)
#define XHCI_SW_BW_CHECKING BIT_ULL(8)
#define XHCI_AMD_0x96_HOST BIT_ULL(9)
#define XHCI_TRUST_TX_LENGTH BIT_ULL(10) /* Deprecated */
#define XHCI_LPM_SUPPORT BIT_ULL(11)
#define XHCI_INTEL_HOST BIT_ULL(12)
#define XHCI_SPURIOUS_REBOOT BIT_ULL(13)
#define XHCI_COMP_MODE_QUIRK BIT_ULL(14)
#define XHCI_AVOID_BEI BIT_ULL(15)
#define XHCI_PLAT BIT_ULL(16) /* Deprecated */
#define XHCI_SLOW_SUSPEND BIT_ULL(17)
#define XHCI_SPURIOUS_WAKEUP BIT_ULL(18)
/* For controllers with a broken beyond repair streams implementation */
#define XHCI_BROKEN_STREAMS BIT_ULL(19)
#define XHCI_PME_STUCK_QUIRK BIT_ULL(20)
#define XHCI_MTK_HOST BIT_ULL(21)
#define XHCI_SSIC_PORT_UNUSED BIT_ULL(22)
#define XHCI_NO_64BIT_SUPPORT BIT_ULL(23)
#define XHCI_MISSING_CAS BIT_ULL(24)
/* For controller with a broken Port Disable implementation */
#define XHCI_BROKEN_PORT_PED BIT_ULL(25)
#define XHCI_LIMIT_ENDPOINT_INTERVAL_7 BIT_ULL(26)
#define XHCI_U2_DISABLE_WAKE BIT_ULL(27)
#define XHCI_ASMEDIA_MODIFY_FLOWCONTROL BIT_ULL(28)
#define XHCI_HW_LPM_DISABLE BIT_ULL(29)
#define XHCI_SUSPEND_DELAY BIT_ULL(30)
#define XHCI_INTEL_USB_ROLE_SW BIT_ULL(31)
#define XHCI_ZERO_64B_REGS BIT_ULL(32)
#define XHCI_DEFAULT_PM_RUNTIME_ALLOW BIT_ULL(33)
#define XHCI_RESET_PLL_ON_DISCONNECT BIT_ULL(34)
#define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35)
/* Reserved. It was XHCI_RENESAS_FW_QUIRK */
#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
#define XHCI_DISABLE_SPARSE BIT_ULL(38)
#define XHCI_SG_TRB_CACHE_SIZE_QUIRK BIT_ULL(39)
#define XHCI_NO_SOFT_RETRY BIT_ULL(40)
#define XHCI_BROKEN_D3COLD_S2I BIT_ULL(41)
#define XHCI_EP_CTX_BROKEN_DCS BIT_ULL(42)
#define XHCI_SUSPEND_RESUME_CLKS BIT_ULL(43)
#define XHCI_RESET_TO_DEFAULT BIT_ULL(44)
#define XHCI_ZHAOXIN_TRB_FETCH BIT_ULL(45)
#define XHCI_ZHAOXIN_HOST BIT_ULL(46)
#define XHCI_WRITE_64_HI_LO BIT_ULL(47)
#define XHCI_CDNS_SCTX_QUIRK BIT_ULL(48)
unsigned int num_active_eps;
unsigned int limit_active_eps;
struct xhci_port *hw_ports;
struct xhci_hub usb2_rhub;
struct xhci_hub usb3_rhub;
/* support xHCI 1.0 spec USB2 hardware LPM */
unsigned hw_lpm_support:1;
/* Broken Suspend flag for SNPS Suspend resume issue */
unsigned broken_suspend:1;
/* Indicates that omitting hcd is supported if root hub has no ports */
unsigned allow_single_roothub:1;
/* cached extended protocol port capabilities */
struct xhci_port_cap *port_caps;
unsigned int num_port_caps;
/* Compliance Mode Recovery Data */
struct timer_list comp_mode_recovery_timer;
u32 port_status_u0;
u16 test_mode;
/* Compliance Mode Timer Triggered every 2 seconds */
#define COMP_MODE_RCVRY_MSECS 2000
struct dentry *debugfs_root;
struct dentry *debugfs_slots;
struct list_head regset_list;
void *dbc;
/* platform-specific data -- must come last */
unsigned long priv[] __aligned(sizeof(s64));
};
/* Platform specific overrides to generic XHCI hc_driver ops */
struct xhci_driver_overrides {
size_t extra_priv_size;
int (*reset)(struct usb_hcd *hcd);
int (*start)(struct usb_hcd *hcd);
int (*add_endpoint)(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep);
int (*drop_endpoint)(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep);
int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
int (*update_hub_device)(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
int (*hub_control)(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength);
};
#define XHCI_CFC_DELAY 10
/* convert between an HCD pointer and the corresponding EHCI_HCD */
static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd)
{
struct usb_hcd *primary_hcd;
if (usb_hcd_is_primary_hcd(hcd))
primary_hcd = hcd;
else
primary_hcd = hcd->primary_hcd;
return (struct xhci_hcd *) (primary_hcd->hcd_priv);
}
static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci)
{
return xhci->main_hcd;
}
static inline struct usb_hcd *xhci_get_usb3_hcd(struct xhci_hcd *xhci)
{
if (xhci->shared_hcd)
return xhci->shared_hcd;
if (!xhci->usb2_rhub.num_ports)
return xhci->main_hcd;
return NULL;
}
static inline bool xhci_hcd_is_usb3(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
return hcd == xhci_get_usb3_hcd(xhci);
}
static inline bool xhci_has_one_roothub(struct xhci_hcd *xhci)
{
return xhci->allow_single_roothub &&
(!xhci->usb2_rhub.num_ports || !xhci->usb3_rhub.num_ports);
}
#define xhci_dbg(xhci, fmt, args...) \
dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
#define xhci_err(xhci, fmt, args...) \
dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
#define xhci_warn(xhci, fmt, args...) \
dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
#define xhci_info(xhci, fmt, args...) \
dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
/*
* Registers should always be accessed with double word or quad word accesses.
*
* Some xHCI implementations may support 64-bit address pointers. Registers
* with 64-bit address pointers should be written to with dword accesses by
* writing the low dword first (ptr[0]), then the high dword (ptr[1]) second.
* xHCI implementations that do not support 64-bit address pointers will ignore
* the high dword, and write order is irrelevant.
*/
static inline u64 xhci_read_64(const struct xhci_hcd *xhci,
__le64 __iomem *regs)
{
return lo_hi_readq(regs);
}
static inline void xhci_write_64(struct xhci_hcd *xhci,
const u64 val, __le64 __iomem *regs)
{
lo_hi_writeq(val, regs);
}
/* Link TRB chain should always be set on 0.95 hosts, and AMD 0.96 ISOC rings */
static inline bool xhci_link_chain_quirk(struct xhci_hcd *xhci, enum xhci_ring_type type)
{
return (xhci->quirks & XHCI_LINK_TRB_QUIRK) ||
(type == TYPE_ISOC && (xhci->quirks & XHCI_AMD_0x96_HOST));
}
/* xHCI debugging */
char *xhci_get_slot_state(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx);
void xhci_dbg_trace(struct xhci_hcd *xhci, void (*trace)(struct va_format *),
const char *fmt, ...);
/* xHCI memory management */
void xhci_mem_cleanup(struct xhci_hcd *xhci);
int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id);
int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags);
int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev);
void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci,
struct usb_device *udev);
unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc);
unsigned int xhci_last_valid_endpoint(u32 added_ctxs);
void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep);
void xhci_update_tt_active_eps(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
int old_active_eps);
void xhci_clear_endpoint_bw_info(struct xhci_bw_info *bw_info);
void xhci_update_bw_info(struct xhci_hcd *xhci,
struct xhci_container_ctx *in_ctx,
struct xhci_input_control_ctx *ctrl_ctx,
struct xhci_virt_device *virt_dev);
void xhci_endpoint_copy(struct xhci_hcd *xhci,
struct xhci_container_ctx *in_ctx,
struct xhci_container_ctx *out_ctx,
unsigned int ep_index);
void xhci_slot_copy(struct xhci_hcd *xhci,
struct xhci_container_ctx *in_ctx,
struct xhci_container_ctx *out_ctx);
int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev,
struct usb_device *udev, struct usb_host_endpoint *ep,
gfp_t mem_flags);
struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
unsigned int num_segs, unsigned int cycle_state,
enum xhci_ring_type type, unsigned int max_packet, gfp_t flags);
void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring);
int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring,
unsigned int num_trbs, gfp_t flags);
void xhci_initialize_ring_info(struct xhci_ring *ring,
unsigned int cycle_state);
void xhci_free_endpoint_ring(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
unsigned int ep_index);
struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
unsigned int num_stream_ctxs,
unsigned int num_streams,
unsigned int max_packet, gfp_t flags);
void xhci_free_stream_info(struct xhci_hcd *xhci,
struct xhci_stream_info *stream_info);
void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci,
struct xhci_ep_ctx *ep_ctx,
struct xhci_stream_info *stream_info);
void xhci_setup_no_streams_ep_input_ctx(struct xhci_ep_ctx *ep_ctx,
struct xhci_virt_ep *ep);
void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev, bool drop_control_ep);
struct xhci_ring *xhci_dma_to_transfer_ring(
struct xhci_virt_ep *ep,
u64 address);
struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
bool allocate_completion, gfp_t mem_flags);
struct xhci_command *xhci_alloc_command_with_ctx(struct xhci_hcd *xhci,
bool allocate_completion, gfp_t mem_flags);
void xhci_urb_free_priv(struct urb_priv *urb_priv);
void xhci_free_command(struct xhci_hcd *xhci,
struct xhci_command *command);
struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
int type, gfp_t flags);
void xhci_free_container_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx);
struct xhci_interrupter *
xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs,
u32 imod_interval);
void xhci_remove_secondary_interrupter(struct usb_hcd
*hcd, struct xhci_interrupter *ir);
/* xHCI host controller glue */
typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *);
int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, u64 timeout_us);
int xhci_handshake_check_state(struct xhci_hcd *xhci, void __iomem *ptr,
u32 mask, u32 done, int usec, unsigned int exit_state);
void xhci_quiesce(struct xhci_hcd *xhci);
int xhci_halt(struct xhci_hcd *xhci);
int xhci_start(struct xhci_hcd *xhci);
int xhci_reset(struct xhci_hcd *xhci, u64 timeout_us);
int xhci_run(struct usb_hcd *hcd);
int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks);
void xhci_shutdown(struct usb_hcd *hcd);
void xhci_stop(struct usb_hcd *hcd);
void xhci_init_driver(struct hc_driver *drv,
const struct xhci_driver_overrides *over);
int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep);
int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep);
int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id);
int xhci_ext_cap_init(struct xhci_hcd *xhci);
int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup);
int xhci_resume(struct xhci_hcd *xhci, pm_message_t msg);
irqreturn_t xhci_irq(struct usb_hcd *hcd);
irqreturn_t xhci_msi_irq(int irq, void *hcd);
int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev);
int xhci_alloc_tt_info(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
int xhci_set_interrupter_moderation(struct xhci_interrupter *ir,
u32 imod_interval);
/* xHCI ring, segment, TRB, and TD functions */
dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
struct xhci_segment *trb_in_td(struct xhci_hcd *xhci, struct xhci_td *td,
dma_addr_t suspect_dma, bool debug);
int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code);
void xhci_ring_cmd_db(struct xhci_hcd *xhci);
int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd,
u32 trb_type, u32 slot_id);
int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
dma_addr_t in_ctx_ptr, u32 slot_id, enum xhci_setup_dev);
int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
u32 field1, u32 field2, u32 field3, u32 field4);
int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
int slot_id, unsigned int ep_index, int suspend);
int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
int slot_id, unsigned int ep_index);
int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
int slot_id, unsigned int ep_index);
int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
int slot_id, unsigned int ep_index);
int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
struct urb *urb, int slot_id, unsigned int ep_index);
int xhci_queue_configure_endpoint(struct xhci_hcd *xhci,
struct xhci_command *cmd, dma_addr_t in_ctx_ptr, u32 slot_id,
bool command_must_succeed);
int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd,
dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed);
int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
int slot_id, unsigned int ep_index,
enum xhci_ep_reset_type reset_type);
int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
u32 slot_id);
void xhci_handle_command_timeout(struct work_struct *work);
void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id,
unsigned int ep_index, unsigned int stream_id);
void xhci_ring_doorbell_for_active_rings(struct xhci_hcd *xhci,
unsigned int slot_id,
unsigned int ep_index);
void xhci_cleanup_command_queue(struct xhci_hcd *xhci);
void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring);
unsigned int count_trbs(u64 addr, u64 len);
/* xHCI roothub code */
void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
u32 link_state);
void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
u32 port_bit);
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
char *buf, u16 wLength);
int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1);
struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd);
enum usb_link_tunnel_mode xhci_port_is_tunneled(struct xhci_hcd *xhci,
struct xhci_port *port);
void xhci_hc_died(struct xhci_hcd *xhci);
#ifdef CONFIG_PM
int xhci_bus_suspend(struct usb_hcd *hcd);
int xhci_bus_resume(struct usb_hcd *hcd);
unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd);
#else
#define xhci_bus_suspend NULL
#define xhci_bus_resume NULL
#define xhci_get_resuming_ports NULL
#endif /* CONFIG_PM */
u32 xhci_port_state_to_neutral(u32 state);
void xhci_ring_device(struct xhci_hcd *xhci, int slot_id);
/* xHCI contexts */
struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx);
struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx);
struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int ep_index);
struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
unsigned int stream_id);
static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
struct urb *urb)
{
return xhci_triad_to_transfer_ring(xhci, urb->dev->slot_id,
xhci_get_endpoint_index(&urb->ep->desc),
urb->stream_id);
}
/*
* TODO: As per spec Isochronous IDT transmissions are supported. We bypass
* them anyways as we where unable to find a device that matches the
* constraints.
*/
static inline bool xhci_urb_suitable_for_idt(struct urb *urb)
{
if (!usb_endpoint_xfer_isoc(&urb->ep->desc) && usb_urb_dir_out(urb) &&
usb_endpoint_maxp(&urb->ep->desc) >= TRB_IDT_MAX_SIZE &&
urb->transfer_buffer_length <= TRB_IDT_MAX_SIZE &&
!(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) &&
!urb->num_sgs)
return true;
return false;
}
static inline char *xhci_slot_state_string(u32 state)
{
switch (state) {
case SLOT_STATE_ENABLED:
return "enabled/disabled";
case SLOT_STATE_DEFAULT:
return "default";
case SLOT_STATE_ADDRESSED:
return "addressed";
case SLOT_STATE_CONFIGURED:
return "configured";
default:
return "reserved";
}
}
static inline const char *xhci_decode_trb(char *str, size_t size,
u32 field0, u32 field1, u32 field2, u32 field3)
{
int type = TRB_FIELD_TO_TYPE(field3);
switch (type) {
case TRB_LINK:
snprintf(str, size,
"LINK %08x%08x intr %d type '%s' flags %c:%c:%c:%c",
field1, field0, GET_INTR_TARGET(field2),
xhci_trb_type_string(type),
field3 & TRB_IOC ? 'I' : 'i',
field3 & TRB_CHAIN ? 'C' : 'c',
field3 & TRB_TC ? 'T' : 't',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_TRANSFER:
case TRB_COMPLETION:
case TRB_PORT_STATUS:
case TRB_BANDWIDTH_EVENT:
case TRB_DOORBELL:
case TRB_HC_EVENT:
case TRB_DEV_NOTE:
case TRB_MFINDEX_WRAP:
snprintf(str, size,
"TRB %08x%08x status '%s' len %d slot %d ep %d type '%s' flags %c:%c",
field1, field0,
xhci_trb_comp_code_string(GET_COMP_CODE(field2)),
EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3),
TRB_TO_EP_ID(field3),
xhci_trb_type_string(type),
field3 & EVENT_DATA ? 'E' : 'e',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_SETUP:
snprintf(str, size,
"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",
field0 & 0xff,
(field0 & 0xff00) >> 8,
(field0 & 0xff000000) >> 24,
(field0 & 0xff0000) >> 16,
(field1 & 0xff00) >> 8,
field1 & 0xff,
(field1 & 0xff000000) >> 16 |
(field1 & 0xff0000) >> 16,
TRB_LEN(field2), GET_TD_SIZE(field2),
GET_INTR_TARGET(field2),
xhci_trb_type_string(type),
field3 & TRB_IDT ? 'I' : 'i',
field3 & TRB_IOC ? 'I' : 'i',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_DATA:
snprintf(str, size,
"Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c",
field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
GET_INTR_TARGET(field2),
xhci_trb_type_string(type),
field3 & TRB_IDT ? 'I' : 'i',
field3 & TRB_IOC ? 'I' : 'i',
field3 & TRB_CHAIN ? 'C' : 'c',
field3 & TRB_NO_SNOOP ? 'S' : 's',
field3 & TRB_ISP ? 'I' : 'i',
field3 & TRB_ENT ? 'E' : 'e',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_STATUS:
snprintf(str, size,
"Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c",
field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
GET_INTR_TARGET(field2),
xhci_trb_type_string(type),
field3 & TRB_IOC ? 'I' : 'i',
field3 & TRB_CHAIN ? 'C' : 'c',
field3 & TRB_ENT ? 'E' : 'e',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_NORMAL:
case TRB_ISOC:
case TRB_EVENT_DATA:
case TRB_TR_NOOP:
snprintf(str, size,
"Buffer %08x%08x length %d TD size %d intr %d type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c",
field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
GET_INTR_TARGET(field2),
xhci_trb_type_string(type),
field3 & TRB_BEI ? 'B' : 'b',
field3 & TRB_IDT ? 'I' : 'i',
field3 & TRB_IOC ? 'I' : 'i',
field3 & TRB_CHAIN ? 'C' : 'c',
field3 & TRB_NO_SNOOP ? 'S' : 's',
field3 & TRB_ISP ? 'I' : 'i',
field3 & TRB_ENT ? 'E' : 'e',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_CMD_NOOP:
case TRB_ENABLE_SLOT:
snprintf(str, size,
"%s: flags %c",
xhci_trb_type_string(type),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_DISABLE_SLOT:
case TRB_NEG_BANDWIDTH:
snprintf(str, size,
"%s: slot %d flags %c",
xhci_trb_type_string(type),
TRB_TO_SLOT_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_ADDR_DEV:
snprintf(str, size,
"%s: ctx %08x%08x slot %d flags %c:%c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_SLOT_ID(field3),
field3 & TRB_BSR ? 'B' : 'b',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_CONFIG_EP:
snprintf(str, size,
"%s: ctx %08x%08x slot %d flags %c:%c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_SLOT_ID(field3),
field3 & TRB_DC ? 'D' : 'd',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_EVAL_CONTEXT:
snprintf(str, size,
"%s: ctx %08x%08x slot %d flags %c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_SLOT_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_RESET_EP:
snprintf(str, size,
"%s: ctx %08x%08x slot %d ep %d flags %c:%c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_SLOT_ID(field3),
TRB_TO_EP_ID(field3),
field3 & TRB_TSP ? 'T' : 't',
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_STOP_RING:
snprintf(str, size,
"%s: slot %d sp %d ep %d flags %c",
xhci_trb_type_string(type),
TRB_TO_SLOT_ID(field3),
TRB_TO_SUSPEND_PORT(field3),
TRB_TO_EP_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_SET_DEQ:
snprintf(str, size,
"%s: deq %08x%08x stream %d slot %d ep %d flags %c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_STREAM_ID(field2),
TRB_TO_SLOT_ID(field3),
TRB_TO_EP_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_RESET_DEV:
snprintf(str, size,
"%s: slot %d flags %c",
xhci_trb_type_string(type),
TRB_TO_SLOT_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_FORCE_EVENT:
snprintf(str, size,
"%s: event %08x%08x vf intr %d vf id %d flags %c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_VF_INTR_TARGET(field2),
TRB_TO_VF_ID(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_SET_LT:
snprintf(str, size,
"%s: belt %d flags %c",
xhci_trb_type_string(type),
TRB_TO_BELT(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_GET_BW:
snprintf(str, size,
"%s: ctx %08x%08x slot %d speed %d flags %c",
xhci_trb_type_string(type),
field1, field0,
TRB_TO_SLOT_ID(field3),
TRB_TO_DEV_SPEED(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
case TRB_FORCE_HEADER:
snprintf(str, size,
"%s: info %08x%08x%08x pkt type %d roothub port %d flags %c",
xhci_trb_type_string(type),
field2, field1, field0 & 0xffffffe0,
TRB_TO_PACKET_TYPE(field0),
TRB_TO_ROOTHUB_PORT(field3),
field3 & TRB_CYCLE ? 'C' : 'c');
break;
default:
snprintf(str, size,
"type '%s' -> raw %08x %08x %08x %08x",
xhci_trb_type_string(type),
field0, field1, field2, field3);
}
return str;
}
static inline const char *xhci_decode_ctrl_ctx(char *str,
unsigned long drop, unsigned long add)
{
unsigned int bit;
int ret = 0;
str[0] = '\0';
if (drop) {
ret = sprintf(str, "Drop:");
for_each_set_bit(bit, &drop, 32)
ret += sprintf(str + ret, " %d%s",
bit / 2,
bit % 2 ? "in":"out");
ret += sprintf(str + ret, ", ");
}
if (add) {
ret += sprintf(str + ret, "Add:%s%s",
(add & SLOT_FLAG) ? " slot":"",
(add & EP0_FLAG) ? " ep0":"");
add &= ~(SLOT_FLAG | EP0_FLAG);
for_each_set_bit(bit, &add, 32)
ret += sprintf(str + ret, " %d%s",
bit / 2,
bit % 2 ? "in":"out");
}
return str;
}
static inline const char *xhci_decode_slot_context(char *str,
u32 info, u32 info2, u32 tt_info, u32 state)
{
u32 speed;
u32 hub;
u32 mtt;
int ret = 0;
speed = info & DEV_SPEED;
hub = info & DEV_HUB;
mtt = info & DEV_MTT;
ret = sprintf(str, "RS %05x %s%s%s Ctx Entries %d MEL %d us Port# %d/%d",
info & ROUTE_STRING_MASK,
({ char *s;
switch (speed) {
case SLOT_SPEED_FS:
s = "full-speed";
break;
case SLOT_SPEED_LS:
s = "low-speed";
break;
case SLOT_SPEED_HS:
s = "high-speed";
break;
case SLOT_SPEED_SS:
s = "super-speed";
break;
case SLOT_SPEED_SSP:
s = "super-speed plus";
break;
default:
s = "UNKNOWN speed";
} s; }),
mtt ? " multi-TT" : "",
hub ? " Hub" : "",
(info & LAST_CTX_MASK) >> 27,
info2 & MAX_EXIT,
DEVINFO_TO_ROOT_HUB_PORT(info2),
DEVINFO_TO_MAX_PORTS(info2));
ret += sprintf(str + ret, " [TT Slot %d Port# %d TTT %d Intr %d] Addr %d State %s",
tt_info & TT_SLOT, (tt_info & TT_PORT) >> 8,
GET_TT_THINK_TIME(tt_info), GET_INTR_TARGET(tt_info),
state & DEV_ADDR_MASK,
xhci_slot_state_string(GET_SLOT_STATE(state)));
return str;
}
static inline const char *xhci_portsc_link_state_string(u32 portsc)
{
switch (portsc & PORT_PLS_MASK) {
case XDEV_U0:
return "U0";
case XDEV_U1:
return "U1";
case XDEV_U2:
return "U2";
case XDEV_U3:
return "U3";
case XDEV_DISABLED:
return "Disabled";
case XDEV_RXDETECT:
return "RxDetect";
case XDEV_INACTIVE:
return "Inactive";
case XDEV_POLLING:
return "Polling";
case XDEV_RECOVERY:
return "Recovery";
case XDEV_HOT_RESET:
return "Hot Reset";
case XDEV_COMP_MODE:
return "Compliance mode";
case XDEV_TEST_MODE:
return "Test mode";
case XDEV_RESUME:
return "Resume";
default:
break;
}
return "Unknown";
}
static inline const char *xhci_decode_portsc(char *str, u32 portsc)
{
int ret;
ret = sprintf(str, "0x%08x ", portsc);
if (portsc == ~(u32)0)
return str;
ret += sprintf(str + ret, "%s %s %s Link:%s PortSpeed:%d ",
portsc & PORT_POWER ? "Powered" : "Powered-off",
portsc & PORT_CONNECT ? "Connected" : "Not-connected",
portsc & PORT_PE ? "Enabled" : "Disabled",
xhci_portsc_link_state_string(portsc),
DEV_PORT_SPEED(portsc));
if (portsc & PORT_OC)
ret += sprintf(str + ret, "OverCurrent ");
if (portsc & PORT_RESET)
ret += sprintf(str + ret, "In-Reset ");
ret += sprintf(str + ret, "Change: ");
if (portsc & PORT_CSC)
ret += sprintf(str + ret, "CSC ");
if (portsc & PORT_PEC)
ret += sprintf(str + ret, "PEC ");
if (portsc & PORT_WRC)
ret += sprintf(str + ret, "WRC ");
if (portsc & PORT_OCC)
ret += sprintf(str + ret, "OCC ");
if (portsc & PORT_RC)
ret += sprintf(str + ret, "PRC ");
if (portsc & PORT_PLC)
ret += sprintf(str + ret, "PLC ");
if (portsc & PORT_CEC)
ret += sprintf(str + ret, "CEC ");
if (portsc & PORT_CAS)
ret += sprintf(str + ret, "CAS ");
ret += sprintf(str + ret, "Wake: ");
if (portsc & PORT_WKCONN_E)
ret += sprintf(str + ret, "WCE ");
if (portsc & PORT_WKDISC_E)
ret += sprintf(str + ret, "WDE ");
if (portsc & PORT_WKOC_E)
ret += sprintf(str + ret, "WOE ");
return str;
}
static inline const char *xhci_decode_usbsts(char *str, u32 usbsts)
{
int ret = 0;
ret = sprintf(str, " 0x%08x", usbsts);
if (usbsts == ~(u32)0)
return str;
if (usbsts & STS_HALT)
ret += sprintf(str + ret, " HCHalted");
if (usbsts & STS_FATAL)
ret += sprintf(str + ret, " HSE");
if (usbsts & STS_EINT)
ret += sprintf(str + ret, " EINT");
if (usbsts & STS_PORT)
ret += sprintf(str + ret, " PCD");
if (usbsts & STS_SAVE)
ret += sprintf(str + ret, " SSS");
if (usbsts & STS_RESTORE)
ret += sprintf(str + ret, " RSS");
if (usbsts & STS_SRE)
ret += sprintf(str + ret, " SRE");
if (usbsts & STS_CNR)
ret += sprintf(str + ret, " CNR");
if (usbsts & STS_HCE)
ret += sprintf(str + ret, " HCE");
return str;
}
static inline const char *xhci_decode_doorbell(char *str, u32 slot, u32 doorbell)
{
u8 ep;
u16 stream;
int ret;
ep = (doorbell & 0xff);
stream = doorbell >> 16;
if (slot == 0) {
sprintf(str, "Command Ring %d", doorbell);
return str;
}
ret = sprintf(str, "Slot %d ", slot);
if (ep > 0 && ep < 32)
ret = sprintf(str + ret, "ep%d%s",
ep / 2,
ep % 2 ? "in" : "out");
else if (ep == 0 || ep < 248)
ret = sprintf(str + ret, "Reserved %d", ep);
else
ret = sprintf(str + ret, "Vendor Defined %d", ep);
if (stream)
ret = sprintf(str + ret, " Stream %d", stream);
return str;
}
static inline const char *xhci_ep_state_string(u8 state)
{
switch (state) {
case EP_STATE_DISABLED:
return "disabled";
case EP_STATE_RUNNING:
return "running";
case EP_STATE_HALTED:
return "halted";
case EP_STATE_STOPPED:
return "stopped";
case EP_STATE_ERROR:
return "error";
default:
return "INVALID";
}
}
static inline const char *xhci_ep_type_string(u8 type)
{
switch (type) {
case ISOC_OUT_EP:
return "Isoc OUT";
case BULK_OUT_EP:
return "Bulk OUT";
case INT_OUT_EP:
return "Int OUT";
case CTRL_EP:
return "Ctrl";
case ISOC_IN_EP:
return "Isoc IN";
case BULK_IN_EP:
return "Bulk IN";
case INT_IN_EP:
return "Int IN";
default:
return "INVALID";
}
}
static inline const char *xhci_decode_ep_context(char *str, u32 info,
u32 info2, u64 deq, u32 tx_info)
{
int ret;
u32 esit;
u16 maxp;
u16 avg;
u8 max_pstr;
u8 ep_state;
u8 interval;
u8 ep_type;
u8 burst;
u8 cerr;
u8 mult;
bool lsa;
bool hid;
esit = CTX_TO_MAX_ESIT_PAYLOAD_HI(info) << 16 |
CTX_TO_MAX_ESIT_PAYLOAD(tx_info);
ep_state = info & EP_STATE_MASK;
max_pstr = CTX_TO_EP_MAXPSTREAMS(info);
interval = CTX_TO_EP_INTERVAL(info);
mult = CTX_TO_EP_MULT(info) + 1;
lsa = !!(info & EP_HAS_LSA);
cerr = (info2 & (3 << 1)) >> 1;
ep_type = CTX_TO_EP_TYPE(info2);
hid = !!(info2 & (1 << 7));
burst = CTX_TO_MAX_BURST(info2);
maxp = MAX_PACKET_DECODED(info2);
avg = EP_AVG_TRB_LENGTH(tx_info);
ret = sprintf(str, "State %s mult %d max P. Streams %d %s",
xhci_ep_state_string(ep_state), mult,
max_pstr, lsa ? "LSA " : "");
ret += sprintf(str + ret, "interval %d us max ESIT payload %d CErr %d ",
(1 << interval) * 125, esit, cerr);
ret += sprintf(str + ret, "Type %s %sburst %d maxp %d deq %016llx ",
xhci_ep_type_string(ep_type), hid ? "HID" : "",
burst, maxp, deq);
ret += sprintf(str + ret, "avg trb len %d", avg);
return str;
}
#endif /* __LINUX_XHCI_HCD_H */
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