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qemu / qemu / b74987cd3bf9bd4bf452ed371d864cbd1dccb08e / . / hw / usb / hcd-xhci.c
blob: d85adaca0dcbd783f5d7b302e94133f9f22224aa [file] [log] [blame]
/*
* USB xHCI controller emulation
*
* Copyright (c) 2011 Securiforest
* Date: 2011-05-11 ; Author: Hector Martin <hector@marcansoft.com>
* Based on usb-ohci.c, emulates Renesas NEC USB 3.0
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/timer.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/queue.h"
#include "migration/vmstate.h"
#include "hw/qdev-properties.h"
#include "trace.h"
#include "qapi/error.h"
#include "hcd-xhci.h"
//#define DEBUG_XHCI
//#define DEBUG_DATA
#ifdef DEBUG_XHCI
#define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
#else
#define DPRINTF(...) do {} while (0)
#endif
#define FIXME(_msg) do { fprintf(stderr, "FIXME %s:%d %s\n", \
__func__, __LINE__, _msg); abort(); } while (0)
#define TRB_LINK_LIMIT 32
#define COMMAND_LIMIT 256
#define TRANSFER_LIMIT 256
#define LEN_CAP 0x40
#define LEN_OPER (0x400 + 0x10 * XHCI_MAXPORTS)
#define LEN_RUNTIME ((XHCI_MAXINTRS + 1) * 0x20)
#define LEN_DOORBELL ((XHCI_MAXSLOTS + 1) * 0x20)
#define OFF_OPER LEN_CAP
#define OFF_RUNTIME 0x1000
#define OFF_DOORBELL 0x2000
#if (OFF_OPER + LEN_OPER) > OFF_RUNTIME
#error Increase OFF_RUNTIME
#endif
#if (OFF_RUNTIME + LEN_RUNTIME) > OFF_DOORBELL
#error Increase OFF_DOORBELL
#endif
#if (OFF_DOORBELL + LEN_DOORBELL) > XHCI_LEN_REGS
# error Increase XHCI_LEN_REGS
#endif
/* bit definitions */
#define USBCMD_RS (1<<0)
#define USBCMD_HCRST (1<<1)
#define USBCMD_INTE (1<<2)
#define USBCMD_HSEE (1<<3)
#define USBCMD_LHCRST (1<<7)
#define USBCMD_CSS (1<<8)
#define USBCMD_CRS (1<<9)
#define USBCMD_EWE (1<<10)
#define USBCMD_EU3S (1<<11)
#define USBSTS_HCH (1<<0)
#define USBSTS_HSE (1<<2)
#define USBSTS_EINT (1<<3)
#define USBSTS_PCD (1<<4)
#define USBSTS_SSS (1<<8)
#define USBSTS_RSS (1<<9)
#define USBSTS_SRE (1<<10)
#define USBSTS_CNR (1<<11)
#define USBSTS_HCE (1<<12)
#define PORTSC_CCS (1<<0)
#define PORTSC_PED (1<<1)
#define PORTSC_OCA (1<<3)
#define PORTSC_PR (1<<4)
#define PORTSC_PLS_SHIFT 5
#define PORTSC_PLS_MASK 0xf
#define PORTSC_PP (1<<9)
#define PORTSC_SPEED_SHIFT 10
#define PORTSC_SPEED_MASK 0xf
#define PORTSC_SPEED_FULL (1<<10)
#define PORTSC_SPEED_LOW (2<<10)
#define PORTSC_SPEED_HIGH (3<<10)
#define PORTSC_SPEED_SUPER (4<<10)
#define PORTSC_PIC_SHIFT 14
#define PORTSC_PIC_MASK 0x3
#define PORTSC_LWS (1<<16)
#define PORTSC_CSC (1<<17)
#define PORTSC_PEC (1<<18)
#define PORTSC_WRC (1<<19)
#define PORTSC_OCC (1<<20)
#define PORTSC_PRC (1<<21)
#define PORTSC_PLC (1<<22)
#define PORTSC_CEC (1<<23)
#define PORTSC_CAS (1<<24)
#define PORTSC_WCE (1<<25)
#define PORTSC_WDE (1<<26)
#define PORTSC_WOE (1<<27)
#define PORTSC_DR (1<<30)
#define PORTSC_WPR (1<<31)
#define CRCR_RCS (1<<0)
#define CRCR_CS (1<<1)
#define CRCR_CA (1<<2)
#define CRCR_CRR (1<<3)
#define IMAN_IP (1<<0)
#define IMAN_IE (1<<1)
#define ERDP_EHB (1<<3)
#define TRB_SIZE 16
typedef struct XHCITRB {
uint64_t parameter;
uint32_t status;
uint32_t control;
dma_addr_t addr;
bool ccs;
} XHCITRB;
enum {
PLS_U0 = 0,
PLS_U1 = 1,
PLS_U2 = 2,
PLS_U3 = 3,
PLS_DISABLED = 4,
PLS_RX_DETECT = 5,
PLS_INACTIVE = 6,
PLS_POLLING = 7,
PLS_RECOVERY = 8,
PLS_HOT_RESET = 9,
PLS_COMPILANCE_MODE = 10,
PLS_TEST_MODE = 11,
PLS_RESUME = 15,
};
#define CR_LINK TR_LINK
#define TRB_C (1<<0)
#define TRB_TYPE_SHIFT 10
#define TRB_TYPE_MASK 0x3f
#define TRB_TYPE(t) (((t).control >> TRB_TYPE_SHIFT) & TRB_TYPE_MASK)
#define TRB_EV_ED (1<<2)
#define TRB_TR_ENT (1<<1)
#define TRB_TR_ISP (1<<2)
#define TRB_TR_NS (1<<3)
#define TRB_TR_CH (1<<4)
#define TRB_TR_IOC (1<<5)
#define TRB_TR_IDT (1<<6)
#define TRB_TR_TBC_SHIFT 7
#define TRB_TR_TBC_MASK 0x3
#define TRB_TR_BEI (1<<9)
#define TRB_TR_TLBPC_SHIFT 16
#define TRB_TR_TLBPC_MASK 0xf
#define TRB_TR_FRAMEID_SHIFT 20
#define TRB_TR_FRAMEID_MASK 0x7ff
#define TRB_TR_SIA (1<<31)
#define TRB_TR_DIR (1<<16)
#define TRB_CR_SLOTID_SHIFT 24
#define TRB_CR_SLOTID_MASK 0xff
#define TRB_CR_EPID_SHIFT 16
#define TRB_CR_EPID_MASK 0x1f
#define TRB_CR_BSR (1<<9)
#define TRB_CR_DC (1<<9)
#define TRB_LK_TC (1<<1)
#define TRB_INTR_SHIFT 22
#define TRB_INTR_MASK 0x3ff
#define TRB_INTR(t) (((t).status >> TRB_INTR_SHIFT) & TRB_INTR_MASK)
#define EP_TYPE_MASK 0x7
#define EP_TYPE_SHIFT 3
#define EP_STATE_MASK 0x7
#define EP_DISABLED (0<<0)
#define EP_RUNNING (1<<0)
#define EP_HALTED (2<<0)
#define EP_STOPPED (3<<0)
#define EP_ERROR (4<<0)
#define SLOT_STATE_MASK 0x1f
#define SLOT_STATE_SHIFT 27
#define SLOT_STATE(s) (((s)>>SLOT_STATE_SHIFT)&SLOT_STATE_MASK)
#define SLOT_ENABLED 0
#define SLOT_DEFAULT 1
#define SLOT_ADDRESSED 2
#define SLOT_CONFIGURED 3
#define SLOT_CONTEXT_ENTRIES_MASK 0x1f
#define SLOT_CONTEXT_ENTRIES_SHIFT 27
#define get_field(data, field) \
(((data) >> field##_SHIFT) & field##_MASK)
#define set_field(data, newval, field) do { \
uint32_t val_ = *data; \
val_ &= ~(field##_MASK << field##_SHIFT); \
val_ |= ((newval) & field##_MASK) << field##_SHIFT; \
*data = val_; \
} while (0)
typedef enum EPType {
ET_INVALID = 0,
ET_ISO_OUT,
ET_BULK_OUT,
ET_INTR_OUT,
ET_CONTROL,
ET_ISO_IN,
ET_BULK_IN,
ET_INTR_IN,
} EPType;
typedef struct XHCITransfer {
XHCIEPContext *epctx;
USBPacket packet;
QEMUSGList sgl;
bool running_async;
bool running_retry;
bool complete;
bool int_req;
unsigned int iso_pkts;
unsigned int streamid;
bool in_xfer;
bool iso_xfer;
bool timed_xfer;
unsigned int trb_count;
XHCITRB *trbs;
TRBCCode status;
unsigned int pkts;
unsigned int pktsize;
unsigned int cur_pkt;
uint64_t mfindex_kick;
QTAILQ_ENTRY(XHCITransfer) next;
} XHCITransfer;
struct XHCIStreamContext {
dma_addr_t pctx;
unsigned int sct;
XHCIRing ring;
};
struct XHCIEPContext {
XHCIState *xhci;
unsigned int slotid;
unsigned int epid;
XHCIRing ring;
uint32_t xfer_count;
QTAILQ_HEAD(, XHCITransfer) transfers;
XHCITransfer *retry;
EPType type;
dma_addr_t pctx;
unsigned int max_psize;
uint32_t state;
uint32_t kick_active;
/* streams */
unsigned int max_pstreams;
bool lsa;
unsigned int nr_pstreams;
XHCIStreamContext *pstreams;
/* iso xfer scheduling */
unsigned int interval;
int64_t mfindex_last;
QEMUTimer *kick_timer;
};
typedef struct XHCIEvRingSeg {
uint32_t addr_low;
uint32_t addr_high;
uint32_t size;
uint32_t rsvd;
} XHCIEvRingSeg;
static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid, unsigned int streamid);
static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid);
static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid);
static void xhci_xfer_report(XHCITransfer *xfer);
static void xhci_event(XHCIState *xhci, XHCIEvent *event, int v);
static void xhci_write_event(XHCIState *xhci, XHCIEvent *event, int v);
static USBEndpoint *xhci_epid_to_usbep(XHCIEPContext *epctx);
static const char *TRBType_names[] = {
[TRB_RESERVED] = "TRB_RESERVED",
[TR_NORMAL] = "TR_NORMAL",
[TR_SETUP] = "TR_SETUP",
[TR_DATA] = "TR_DATA",
[TR_STATUS] = "TR_STATUS",
[TR_ISOCH] = "TR_ISOCH",
[TR_LINK] = "TR_LINK",
[TR_EVDATA] = "TR_EVDATA",
[TR_NOOP] = "TR_NOOP",
[CR_ENABLE_SLOT] = "CR_ENABLE_SLOT",
[CR_DISABLE_SLOT] = "CR_DISABLE_SLOT",
[CR_ADDRESS_DEVICE] = "CR_ADDRESS_DEVICE",
[CR_CONFIGURE_ENDPOINT] = "CR_CONFIGURE_ENDPOINT",
[CR_EVALUATE_CONTEXT] = "CR_EVALUATE_CONTEXT",
[CR_RESET_ENDPOINT] = "CR_RESET_ENDPOINT",
[CR_STOP_ENDPOINT] = "CR_STOP_ENDPOINT",
[CR_SET_TR_DEQUEUE] = "CR_SET_TR_DEQUEUE",
[CR_RESET_DEVICE] = "CR_RESET_DEVICE",
[CR_FORCE_EVENT] = "CR_FORCE_EVENT",
[CR_NEGOTIATE_BW] = "CR_NEGOTIATE_BW",
[CR_SET_LATENCY_TOLERANCE] = "CR_SET_LATENCY_TOLERANCE",
[CR_GET_PORT_BANDWIDTH] = "CR_GET_PORT_BANDWIDTH",
[CR_FORCE_HEADER] = "CR_FORCE_HEADER",
[CR_NOOP] = "CR_NOOP",
[ER_TRANSFER] = "ER_TRANSFER",
[ER_COMMAND_COMPLETE] = "ER_COMMAND_COMPLETE",
[ER_PORT_STATUS_CHANGE] = "ER_PORT_STATUS_CHANGE",
[ER_BANDWIDTH_REQUEST] = "ER_BANDWIDTH_REQUEST",
[ER_DOORBELL] = "ER_DOORBELL",
[ER_HOST_CONTROLLER] = "ER_HOST_CONTROLLER",
[ER_DEVICE_NOTIFICATION] = "ER_DEVICE_NOTIFICATION",
[ER_MFINDEX_WRAP] = "ER_MFINDEX_WRAP",
[CR_VENDOR_NEC_FIRMWARE_REVISION] = "CR_VENDOR_NEC_FIRMWARE_REVISION",
[CR_VENDOR_NEC_CHALLENGE_RESPONSE] = "CR_VENDOR_NEC_CHALLENGE_RESPONSE",
};
static const char *TRBCCode_names[] = {
[CC_INVALID] = "CC_INVALID",
[CC_SUCCESS] = "CC_SUCCESS",
[CC_DATA_BUFFER_ERROR] = "CC_DATA_BUFFER_ERROR",
[CC_BABBLE_DETECTED] = "CC_BABBLE_DETECTED",
[CC_USB_TRANSACTION_ERROR] = "CC_USB_TRANSACTION_ERROR",
[CC_TRB_ERROR] = "CC_TRB_ERROR",
[CC_STALL_ERROR] = "CC_STALL_ERROR",
[CC_RESOURCE_ERROR] = "CC_RESOURCE_ERROR",
[CC_BANDWIDTH_ERROR] = "CC_BANDWIDTH_ERROR",
[CC_NO_SLOTS_ERROR] = "CC_NO_SLOTS_ERROR",
[CC_INVALID_STREAM_TYPE_ERROR] = "CC_INVALID_STREAM_TYPE_ERROR",
[CC_SLOT_NOT_ENABLED_ERROR] = "CC_SLOT_NOT_ENABLED_ERROR",
[CC_EP_NOT_ENABLED_ERROR] = "CC_EP_NOT_ENABLED_ERROR",
[CC_SHORT_PACKET] = "CC_SHORT_PACKET",
[CC_RING_UNDERRUN] = "CC_RING_UNDERRUN",
[CC_RING_OVERRUN] = "CC_RING_OVERRUN",
[CC_VF_ER_FULL] = "CC_VF_ER_FULL",
[CC_PARAMETER_ERROR] = "CC_PARAMETER_ERROR",
[CC_BANDWIDTH_OVERRUN] = "CC_BANDWIDTH_OVERRUN",
[CC_CONTEXT_STATE_ERROR] = "CC_CONTEXT_STATE_ERROR",
[CC_NO_PING_RESPONSE_ERROR] = "CC_NO_PING_RESPONSE_ERROR",
[CC_EVENT_RING_FULL_ERROR] = "CC_EVENT_RING_FULL_ERROR",
[CC_INCOMPATIBLE_DEVICE_ERROR] = "CC_INCOMPATIBLE_DEVICE_ERROR",
[CC_MISSED_SERVICE_ERROR] = "CC_MISSED_SERVICE_ERROR",
[CC_COMMAND_RING_STOPPED] = "CC_COMMAND_RING_STOPPED",
[CC_COMMAND_ABORTED] = "CC_COMMAND_ABORTED",
[CC_STOPPED] = "CC_STOPPED",
[CC_STOPPED_LENGTH_INVALID] = "CC_STOPPED_LENGTH_INVALID",
[CC_MAX_EXIT_LATENCY_TOO_LARGE_ERROR]
= "CC_MAX_EXIT_LATENCY_TOO_LARGE_ERROR",
[CC_ISOCH_BUFFER_OVERRUN] = "CC_ISOCH_BUFFER_OVERRUN",
[CC_EVENT_LOST_ERROR] = "CC_EVENT_LOST_ERROR",
[CC_UNDEFINED_ERROR] = "CC_UNDEFINED_ERROR",
[CC_INVALID_STREAM_ID_ERROR] = "CC_INVALID_STREAM_ID_ERROR",
[CC_SECONDARY_BANDWIDTH_ERROR] = "CC_SECONDARY_BANDWIDTH_ERROR",
[CC_SPLIT_TRANSACTION_ERROR] = "CC_SPLIT_TRANSACTION_ERROR",
};
static const char *ep_state_names[] = {
[EP_DISABLED] = "disabled",
[EP_RUNNING] = "running",
[EP_HALTED] = "halted",
[EP_STOPPED] = "stopped",
[EP_ERROR] = "error",
};
static const char *lookup_name(uint32_t index, const char **list, uint32_t llen)
{
if (index >= llen || list[index] == NULL) {
return "???";
}
return list[index];
}
static const char *trb_name(XHCITRB *trb)
{
return lookup_name(TRB_TYPE(*trb), TRBType_names,
ARRAY_SIZE(TRBType_names));
}
static const char *event_name(XHCIEvent *event)
{
return lookup_name(event->ccode, TRBCCode_names,
ARRAY_SIZE(TRBCCode_names));
}
static const char *ep_state_name(uint32_t state)
{
return lookup_name(state, ep_state_names,
ARRAY_SIZE(ep_state_names));
}
bool xhci_get_flag(XHCIState *xhci, enum xhci_flags bit)
{
return xhci->flags & (1 << bit);
}
void xhci_set_flag(XHCIState *xhci, enum xhci_flags bit)
{
xhci->flags |= (1 << bit);
}
static uint64_t xhci_mfindex_get(XHCIState *xhci)
{
int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
return (now - xhci->mfindex_start) / 125000;
}
static void xhci_mfwrap_update(XHCIState *xhci)
{
const uint32_t bits = USBCMD_RS | USBCMD_EWE;
uint32_t mfindex, left;
int64_t now;
if ((xhci->usbcmd & bits) == bits) {
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
mfindex = ((now - xhci->mfindex_start) / 125000) & 0x3fff;
left = 0x4000 - mfindex;
timer_mod(xhci->mfwrap_timer, now + left * 125000);
} else {
timer_del(xhci->mfwrap_timer);
}
}
static void xhci_mfwrap_timer(void *opaque)
{
XHCIState *xhci = opaque;
XHCIEvent wrap = { ER_MFINDEX_WRAP, CC_SUCCESS };
xhci_event(xhci, &wrap, 0);
xhci_mfwrap_update(xhci);
}
static void xhci_die(XHCIState *xhci)
{
xhci->usbsts |= USBSTS_HCE;
DPRINTF("xhci: asserted controller error\n");
}
static inline dma_addr_t xhci_addr64(uint32_t low, uint32_t high)
{
if (sizeof(dma_addr_t) == 4) {
return low;
} else {
return low | (((dma_addr_t)high << 16) << 16);
}
}
static inline dma_addr_t xhci_mask64(uint64_t addr)
{
if (sizeof(dma_addr_t) == 4) {
return addr & 0xffffffff;
} else {
return addr;
}
}
static inline void xhci_dma_read_u32s(XHCIState *xhci, dma_addr_t addr,
uint32_t *buf, size_t len)
{
int i;
assert((len % sizeof(uint32_t)) == 0);
if (dma_memory_read(xhci->as, addr, buf, len,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
memset(buf, 0xff, len);
xhci_die(xhci);
return;
}
for (i = 0; i < (len / sizeof(uint32_t)); i++) {
buf[i] = le32_to_cpu(buf[i]);
}
}
static inline void xhci_dma_write_u32s(XHCIState *xhci, dma_addr_t addr,
const uint32_t *buf, size_t len)
{
int i;
uint32_t tmp[5];
uint32_t n = len / sizeof(uint32_t);
assert((len % sizeof(uint32_t)) == 0);
assert(n <= ARRAY_SIZE(tmp));
for (i = 0; i < n; i++) {
tmp[i] = cpu_to_le32(buf[i]);
}
if (dma_memory_write(xhci->as, addr, tmp, len,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
xhci_die(xhci);
return;
}
}
static XHCIPort *xhci_lookup_port(XHCIState *xhci, struct USBPort *uport)
{
int index;
if (!uport->dev) {
return NULL;
}
switch (uport->dev->speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
case USB_SPEED_HIGH:
index = uport->index + xhci->numports_3;
break;
case USB_SPEED_SUPER:
index = uport->index;
break;
default:
return NULL;
}
return &xhci->ports[index];
}
static void xhci_intr_update(XHCIState *xhci, int v)
{
int level = 0;
if (v == 0) {
if (xhci->intr[0].iman & IMAN_IP &&
xhci->intr[0].iman & IMAN_IE &&
xhci->usbcmd & USBCMD_INTE) {
level = 1;
}
if (xhci->intr_raise) {
if (xhci->intr_raise(xhci, 0, level)) {
xhci->intr[0].iman &= ~IMAN_IP;
}
}
}
if (xhci->intr_update) {
xhci->intr_update(xhci, v,
xhci->intr[v].iman & IMAN_IE);
}
}
static void xhci_intr_raise(XHCIState *xhci, int v)
{
bool pending = (xhci->intr[v].erdp_low & ERDP_EHB);
xhci->intr[v].erdp_low |= ERDP_EHB;
xhci->intr[v].iman |= IMAN_IP;
xhci->usbsts |= USBSTS_EINT;
if (pending) {
return;
}
if (!(xhci->intr[v].iman & IMAN_IE)) {
return;
}
if (!(xhci->usbcmd & USBCMD_INTE)) {
return;
}
if (xhci->intr_raise) {
if (xhci->intr_raise(xhci, v, true)) {
xhci->intr[v].iman &= ~IMAN_IP;
}
}
}
static inline int xhci_running(XHCIState *xhci)
{
return !(xhci->usbsts & USBSTS_HCH);
}
static void xhci_write_event(XHCIState *xhci, XHCIEvent *event, int v)
{
XHCIInterrupter *intr = &xhci->intr[v];
XHCITRB ev_trb;
dma_addr_t addr;
ev_trb.parameter = cpu_to_le64(event->ptr);
ev_trb.status = cpu_to_le32(event->length | (event->ccode << 24));
ev_trb.control = (event->slotid << 24) | (event->epid << 16) |
event->flags | (event->type << TRB_TYPE_SHIFT);
if (intr->er_pcs) {
ev_trb.control |= TRB_C;
}
ev_trb.control = cpu_to_le32(ev_trb.control);
trace_usb_xhci_queue_event(v, intr->er_ep_idx, trb_name(&ev_trb),
event_name(event), ev_trb.parameter,
ev_trb.status, ev_trb.control);
addr = intr->er_start + TRB_SIZE*intr->er_ep_idx;
if (dma_memory_write(xhci->as, addr, &ev_trb, TRB_SIZE,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
xhci_die(xhci);
}
intr->er_ep_idx++;
if (intr->er_ep_idx >= intr->er_size) {
intr->er_ep_idx = 0;
intr->er_pcs = !intr->er_pcs;
}
}
static void xhci_event(XHCIState *xhci, XHCIEvent *event, int v)
{
XHCIInterrupter *intr;
dma_addr_t erdp;
unsigned int dp_idx;
if (v >= xhci->numintrs) {
DPRINTF("intr nr out of range (%d >= %d)\n", v, xhci->numintrs);
return;
}
intr = &xhci->intr[v];
erdp = xhci_addr64(intr->erdp_low, intr->erdp_high);
if (erdp < intr->er_start ||
erdp >= (intr->er_start + TRB_SIZE*intr->er_size)) {
DPRINTF("xhci: ERDP out of bounds: "DMA_ADDR_FMT"\n", erdp);
DPRINTF("xhci: ER[%d] at "DMA_ADDR_FMT" len %d\n",
v, intr->er_start, intr->er_size);
xhci_die(xhci);
return;
}
dp_idx = (erdp - intr->er_start) / TRB_SIZE;
assert(dp_idx < intr->er_size);
if ((intr->er_ep_idx + 2) % intr->er_size == dp_idx) {
DPRINTF("xhci: ER %d full, send ring full error\n", v);
XHCIEvent full = {ER_HOST_CONTROLLER, CC_EVENT_RING_FULL_ERROR};
xhci_write_event(xhci, &full, v);
} else if ((intr->er_ep_idx + 1) % intr->er_size == dp_idx) {
DPRINTF("xhci: ER %d full, drop event\n", v);
} else {
xhci_write_event(xhci, event, v);
}
xhci_intr_raise(xhci, v);
}
static void xhci_ring_init(XHCIState *xhci, XHCIRing *ring,
dma_addr_t base)
{
ring->dequeue = base;
ring->ccs = 1;
}
static TRBType xhci_ring_fetch(XHCIState *xhci, XHCIRing *ring, XHCITRB *trb,
dma_addr_t *addr)
{
uint32_t link_cnt = 0;
while (1) {
TRBType type;
if (dma_memory_read(xhci->as, ring->dequeue, trb, TRB_SIZE,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
return 0;
}
trb->addr = ring->dequeue;
trb->ccs = ring->ccs;
le64_to_cpus(&trb->parameter);
le32_to_cpus(&trb->status);
le32_to_cpus(&trb->control);
trace_usb_xhci_fetch_trb(ring->dequeue, trb_name(trb),
trb->parameter, trb->status, trb->control);
if ((trb->control & TRB_C) != ring->ccs) {
return 0;
}
type = TRB_TYPE(*trb);
if (type != TR_LINK) {
if (addr) {
*addr = ring->dequeue;
}
ring->dequeue += TRB_SIZE;
return type;
} else {
if (++link_cnt > TRB_LINK_LIMIT) {
trace_usb_xhci_enforced_limit("trb-link");
return 0;
}
ring->dequeue = xhci_mask64(trb->parameter);
if (trb->control & TRB_LK_TC) {
ring->ccs = !ring->ccs;
}
}
}
}
static int xhci_ring_chain_length(XHCIState *xhci, const XHCIRing *ring)
{
XHCITRB trb;
int length = 0;
dma_addr_t dequeue = ring->dequeue;
bool ccs = ring->ccs;
/* hack to bundle together the two/three TDs that make a setup transfer */
bool control_td_set = 0;
uint32_t link_cnt = 0;
do {
TRBType type;
if (dma_memory_read(xhci->as, dequeue, &trb, TRB_SIZE,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
return -1;
}
le64_to_cpus(&trb.parameter);
le32_to_cpus(&trb.status);
le32_to_cpus(&trb.control);
if ((trb.control & TRB_C) != ccs) {
return -length;
}
type = TRB_TYPE(trb);
if (type == TR_LINK) {
if (++link_cnt > TRB_LINK_LIMIT) {
return -length;
}
dequeue = xhci_mask64(trb.parameter);
if (trb.control & TRB_LK_TC) {
ccs = !ccs;
}
continue;
}
length += 1;
dequeue += TRB_SIZE;
if (type == TR_SETUP) {
control_td_set = 1;
} else if (type == TR_STATUS) {
control_td_set = 0;
}
if (!control_td_set && !(trb.control & TRB_TR_CH)) {
return length;
}
/*
* According to the xHCI spec, Transfer Ring segments should have
* a maximum size of 64 kB (see chapter "6 Data Structures")
*/
} while (length < TRB_LINK_LIMIT * 65536 / TRB_SIZE);
qemu_log_mask(LOG_GUEST_ERROR, "%s: exceeded maximum transfer ring size!\n",
__func__);
return -1;
}
static void xhci_er_reset(XHCIState *xhci, int v)
{
XHCIInterrupter *intr = &xhci->intr[v];
XHCIEvRingSeg seg;
dma_addr_t erstba = xhci_addr64(intr->erstba_low, intr->erstba_high);
if (intr->erstsz == 0 || erstba == 0) {
/* disabled */
intr->er_start = 0;
intr->er_size = 0;
return;
}
/* cache the (sole) event ring segment location */
if (intr->erstsz != 1) {
DPRINTF("xhci: invalid value for ERSTSZ: %d\n", intr->erstsz);
xhci_die(xhci);
return;
}
if (dma_memory_read(xhci->as, erstba, &seg, sizeof(seg),
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory access failed!\n",
__func__);
xhci_die(xhci);
return;
}
le32_to_cpus(&seg.addr_low);
le32_to_cpus(&seg.addr_high);
le32_to_cpus(&seg.size);
if (seg.size < 16 || seg.size > 4096) {
DPRINTF("xhci: invalid value for segment size: %d\n", seg.size);
xhci_die(xhci);
return;
}
intr->er_start = xhci_addr64(seg.addr_low, seg.addr_high);
intr->er_size = seg.size;
intr->er_ep_idx = 0;
intr->er_pcs = 1;
DPRINTF("xhci: event ring[%d]:" DMA_ADDR_FMT " [%d]\n",
v, intr->er_start, intr->er_size);
}
static void xhci_run(XHCIState *xhci)
{
trace_usb_xhci_run();
xhci->usbsts &= ~USBSTS_HCH;
xhci->mfindex_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
static void xhci_stop(XHCIState *xhci)
{
trace_usb_xhci_stop();
xhci->usbsts |= USBSTS_HCH;
xhci->crcr_low &= ~CRCR_CRR;
}
static XHCIStreamContext *xhci_alloc_stream_contexts(unsigned count,
dma_addr_t base)
{
XHCIStreamContext *stctx;
unsigned int i;
stctx = g_new0(XHCIStreamContext, count);
for (i = 0; i < count; i++) {
stctx[i].pctx = base + i * 16;
stctx[i].sct = -1;
}
return stctx;
}
static void xhci_reset_streams(XHCIEPContext *epctx)
{
unsigned int i;
for (i = 0; i < epctx->nr_pstreams; i++) {
epctx->pstreams[i].sct = -1;
}
}
static void xhci_alloc_streams(XHCIEPContext *epctx, dma_addr_t base)
{
assert(epctx->pstreams == NULL);
epctx->nr_pstreams = 2 << epctx->max_pstreams;
epctx->pstreams = xhci_alloc_stream_contexts(epctx->nr_pstreams, base);
}
static void xhci_free_streams(XHCIEPContext *epctx)
{
assert(epctx->pstreams != NULL);
g_free(epctx->pstreams);
epctx->pstreams = NULL;
epctx->nr_pstreams = 0;
}
static int xhci_epmask_to_eps_with_streams(XHCIState *xhci,
unsigned int slotid,
uint32_t epmask,
XHCIEPContext **epctxs,
USBEndpoint **eps)
{
XHCISlot *slot;
XHCIEPContext *epctx;
USBEndpoint *ep;
int i, j;
assert(slotid >= 1 && slotid <= xhci->numslots);
slot = &xhci->slots[slotid - 1];
for (i = 2, j = 0; i <= 31; i++) {
if (!(epmask & (1u << i))) {
continue;
}
epctx = slot->eps[i - 1];
ep = xhci_epid_to_usbep(epctx);
if (!epctx || !epctx->nr_pstreams || !ep) {
continue;
}
if (epctxs) {
epctxs[j] = epctx;
}
eps[j++] = ep;
}
return j;
}
static void xhci_free_device_streams(XHCIState *xhci, unsigned int slotid,
uint32_t epmask)
{
USBEndpoint *eps[30];
int nr_eps;
nr_eps = xhci_epmask_to_eps_with_streams(xhci, slotid, epmask, NULL, eps);
if (nr_eps) {
usb_device_free_streams(eps[0]->dev, eps, nr_eps);
}
}
static TRBCCode xhci_alloc_device_streams(XHCIState *xhci, unsigned int slotid,
uint32_t epmask)
{
XHCIEPContext *epctxs[30];
USBEndpoint *eps[30];
int i, r, nr_eps, req_nr_streams, dev_max_streams;
nr_eps = xhci_epmask_to_eps_with_streams(xhci, slotid, epmask, epctxs,
eps);
if (nr_eps == 0) {
return CC_SUCCESS;
}
req_nr_streams = epctxs[0]->nr_pstreams;
dev_max_streams = eps[0]->max_streams;
for (i = 1; i < nr_eps; i++) {
/*
* HdG: I don't expect these to ever trigger, but if they do we need
* to come up with another solution, ie group identical endpoints
* together and make an usb_device_alloc_streams call per group.
*/
if (epctxs[i]->nr_pstreams != req_nr_streams) {
FIXME("guest streams config not identical for all eps");
return CC_RESOURCE_ERROR;
}
if (eps[i]->max_streams != dev_max_streams) {
FIXME("device streams config not identical for all eps");
return CC_RESOURCE_ERROR;
}
}
/*
* max-streams in both the device descriptor and in the controller is a
* power of 2. But stream id 0 is reserved, so if a device can do up to 4
* streams the guest will ask for 5 rounded up to the next power of 2 which
* becomes 8. For emulated devices usb_device_alloc_streams is a nop.
*
* For redirected devices however this is an issue, as there we must ask
* the real xhci controller to alloc streams, and the host driver for the
* real xhci controller will likely disallow allocating more streams then
* the device can handle.
*
* So we limit the requested nr_streams to the maximum number the device
* can handle.
*/
if (req_nr_streams > dev_max_streams) {
req_nr_streams = dev_max_streams;
}
r = usb_device_alloc_streams(eps[0]->dev, eps, nr_eps, req_nr_streams);
if (r != 0) {
DPRINTF("xhci: alloc streams failed\n");
return CC_RESOURCE_ERROR;
}
return CC_SUCCESS;
}
static XHCIStreamContext *xhci_find_stream(XHCIEPContext *epctx,
unsigned int streamid,
uint32_t *cc_error)
{
XHCIStreamContext *sctx;
dma_addr_t base;
uint32_t ctx[2], sct;
assert(streamid != 0);
if (epctx->lsa) {
if (streamid >= epctx->nr_pstreams) {
*cc_error = CC_INVALID_STREAM_ID_ERROR;
return NULL;
}
sctx = epctx->pstreams + streamid;
} else {
fprintf(stderr, "xhci: FIXME: secondary streams not implemented yet");
*cc_error = CC_INVALID_STREAM_TYPE_ERROR;
return NULL;
}
if (sctx->sct == -1) {
xhci_dma_read_u32s(epctx->xhci, sctx->pctx, ctx, sizeof(ctx));
sct = (ctx[0] >> 1) & 0x07;
if (epctx->lsa && sct != 1) {
*cc_error = CC_INVALID_STREAM_TYPE_ERROR;
return NULL;
}
sctx->sct = sct;
base = xhci_addr64(ctx[0] & ~0xf, ctx[1]);
xhci_ring_init(epctx->xhci, &sctx->ring, base);
}
return sctx;
}
static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
XHCIStreamContext *sctx, uint32_t state)
{
XHCIRing *ring = NULL;
uint32_t ctx[5];
uint32_t ctx2[2];
xhci_dma_read_u32s(xhci, epctx->pctx, ctx, sizeof(ctx));
ctx[0] &= ~EP_STATE_MASK;
ctx[0] |= state;
/* update ring dequeue ptr */
if (epctx->nr_pstreams) {
if (sctx != NULL) {
ring = &sctx->ring;
xhci_dma_read_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
ctx2[0] &= 0xe;
ctx2[0] |= sctx->ring.dequeue | sctx->ring.ccs;
ctx2[1] = (sctx->ring.dequeue >> 16) >> 16;
xhci_dma_write_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
}
} else {
ring = &epctx->ring;
}
if (ring) {
ctx[2] = ring->dequeue | ring->ccs;
ctx[3] = (ring->dequeue >> 16) >> 16;
DPRINTF("xhci: set epctx: " DMA_ADDR_FMT " state=%d dequeue=%08x%08x\n",
epctx->pctx, state, ctx[3], ctx[2]);
}
xhci_dma_write_u32s(xhci, epctx->pctx, ctx, sizeof(ctx));
if (epctx->state != state) {
trace_usb_xhci_ep_state(epctx->slotid, epctx->epid,
ep_state_name(epctx->state),
ep_state_name(state));
}
epctx->state = state;
}
static void xhci_ep_kick_timer(void *opaque)
{
XHCIEPContext *epctx = opaque;
xhci_kick_epctx(epctx, 0);
}
static XHCIEPContext *xhci_alloc_epctx(XHCIState *xhci,
unsigned int slotid,
unsigned int epid)
{
XHCIEPContext *epctx;
epctx = g_new0(XHCIEPContext, 1);
epctx->xhci = xhci;
epctx->slotid = slotid;
epctx->epid = epid;
QTAILQ_INIT(&epctx->transfers);
epctx->kick_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, xhci_ep_kick_timer, epctx);
return epctx;
}
static void xhci_init_epctx(XHCIEPContext *epctx,
dma_addr_t pctx, uint32_t *ctx)
{
dma_addr_t dequeue;
dequeue = xhci_addr64(ctx[2] & ~0xf, ctx[3]);
epctx->type = (ctx[1] >> EP_TYPE_SHIFT) & EP_TYPE_MASK;
epctx->pctx = pctx;
epctx->max_psize = ctx[1]>>16;
epctx->max_psize *= 1+((ctx[1]>>8)&0xff);
epctx->max_pstreams = (ctx[0] >> 10) & epctx->xhci->max_pstreams_mask;
epctx->lsa = (ctx[0] >> 15) & 1;
if (epctx->max_pstreams) {
xhci_alloc_streams(epctx, dequeue);
} else {
xhci_ring_init(epctx->xhci, &epctx->ring, dequeue);
epctx->ring.ccs = ctx[2] & 1;
}
epctx->interval = 1 << ((ctx[0] >> 16) & 0xff);
}
static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid, dma_addr_t pctx,
uint32_t *ctx)
{
XHCISlot *slot;
XHCIEPContext *epctx;
trace_usb_xhci_ep_enable(slotid, epid);
assert(slotid >= 1 && slotid <= xhci->numslots);
assert(epid >= 1 && epid <= 31);
slot = &xhci->slots[slotid-1];
if (slot->eps[epid-1]) {
xhci_disable_ep(xhci, slotid, epid);
}
epctx = xhci_alloc_epctx(xhci, slotid, epid);
slot->eps[epid-1] = epctx;
xhci_init_epctx(epctx, pctx, ctx);
DPRINTF("xhci: endpoint %d.%d type is %d, max transaction (burst) "
"size is %d\n", epid/2, epid%2, epctx->type, epctx->max_psize);
epctx->mfindex_last = 0;
epctx->state = EP_RUNNING;
ctx[0] &= ~EP_STATE_MASK;
ctx[0] |= EP_RUNNING;
return CC_SUCCESS;
}
static XHCITransfer *xhci_ep_alloc_xfer(XHCIEPContext *epctx,
uint32_t length)
{
uint32_t limit = epctx->nr_pstreams + 16;
XHCITransfer *xfer;
if (epctx->xfer_count >= limit) {
return NULL;
}
xfer = g_new0(XHCITransfer, 1);
xfer->epctx = epctx;
xfer->trbs = g_new(XHCITRB, length);
xfer->trb_count = length;
usb_packet_init(&xfer->packet);
QTAILQ_INSERT_TAIL(&epctx->transfers, xfer, next);
epctx->xfer_count++;
return xfer;
}
static void xhci_ep_free_xfer(XHCITransfer *xfer)
{
QTAILQ_REMOVE(&xfer->epctx->transfers, xfer, next);
xfer->epctx->xfer_count--;
usb_packet_cleanup(&xfer->packet);
g_free(xfer->trbs);
g_free(xfer);
}
static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report)
{
int killed = 0;
if (report && (t->running_async || t->running_retry)) {
t->status = report;
xhci_xfer_report(t);
}
if (t->running_async) {
usb_cancel_packet(&t->packet);
t->running_async = 0;
killed = 1;
}
if (t->running_retry) {
if (t->epctx) {
t->epctx->retry = NULL;
timer_del(t->epctx->kick_timer);
}
t->running_retry = 0;
killed = 1;
}
g_free(t->trbs);
t->trbs = NULL;
t->trb_count = 0;
return killed;
}
static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
unsigned int epid, TRBCCode report)
{
XHCISlot *slot;
XHCIEPContext *epctx;
XHCITransfer *xfer;
int killed = 0;
USBEndpoint *ep = NULL;
assert(slotid >= 1 && slotid <= xhci->numslots);
assert(epid >= 1 && epid <= 31);
DPRINTF("xhci_ep_nuke_xfers(%d, %d)\n", slotid, epid);
slot = &xhci->slots[slotid-1];
if (!slot->eps[epid-1]) {
return 0;
}
epctx = slot->eps[epid-1];
for (;;) {
xfer = QTAILQ_FIRST(&epctx->transfers);
if (xfer == NULL) {
break;
}
killed += xhci_ep_nuke_one_xfer(xfer, report);
if (killed) {
report = 0; /* Only report once */
}
xhci_ep_free_xfer(xfer);
}
ep = xhci_epid_to_usbep(epctx);
if (ep) {
usb_device_ep_stopped(ep->dev, ep);
}
return killed;
}
static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid)
{
XHCISlot *slot;
XHCIEPContext *epctx;
trace_usb_xhci_ep_disable(slotid, epid);
assert(slotid >= 1 && slotid <= xhci->numslots);
assert(epid >= 1 && epid <= 31);
slot = &xhci->slots[slotid-1];
if (!slot->eps[epid-1]) {
DPRINTF("xhci: slot %d ep %d already disabled\n", slotid, epid);
return CC_SUCCESS;
}
xhci_ep_nuke_xfers(xhci, slotid, epid, 0);
epctx = slot->eps[epid-1];
if (epctx->nr_pstreams) {
xhci_free_streams(epctx);
}
/* only touch guest RAM if we're not resetting the HC */
if (xhci->dcbaap_low || xhci->dcbaap_high) {
xhci_set_ep_state(xhci, epctx, NULL, EP_DISABLED);
}
timer_free(epctx->kick_timer);
g_free(epctx);
slot->eps[epid-1] = NULL;
return CC_SUCCESS;
}
static TRBCCode xhci_stop_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid)
{
XHCISlot *slot;
XHCIEPContext *epctx;
trace_usb_xhci_ep_stop(slotid, epid);
assert(slotid >= 1 && slotid <= xhci->numslots);
if (epid < 1 || epid > 31) {
DPRINTF("xhci: bad ep %d\n", epid);
return CC_TRB_ERROR;
}
slot = &xhci->slots[slotid-1];
if (!slot->eps[epid-1]) {
DPRINTF("xhci: slot %d ep %d not enabled\n", slotid, epid);
return CC_EP_NOT_ENABLED_ERROR;
}
if (xhci_ep_nuke_xfers(xhci, slotid, epid, CC_STOPPED) > 0) {
DPRINTF("xhci: FIXME: endpoint stopped w/ xfers running, "
"data might be lost\n");
}
epctx = slot->eps[epid-1];
xhci_set_ep_state(xhci, epctx, NULL, EP_STOPPED);
if (epctx->nr_pstreams) {
xhci_reset_streams(epctx);
}
return CC_SUCCESS;
}
static TRBCCode xhci_reset_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid)
{
XHCISlot *slot;
XHCIEPContext *epctx;
trace_usb_xhci_ep_reset(slotid, epid);
assert(slotid >= 1 && slotid <= xhci->numslots);
if (epid < 1 || epid > 31) {
DPRINTF("xhci: bad ep %d\n", epid);
return CC_TRB_ERROR;
}
slot = &xhci->slots[slotid-1];
if (!slot->eps[epid-1]) {
DPRINTF("xhci: slot %d ep %d not enabled\n", slotid, epid);
return CC_EP_NOT_ENABLED_ERROR;
}
epctx = slot->eps[epid-1];
if (epctx->state != EP_HALTED) {
DPRINTF("xhci: reset EP while EP %d not halted (%d)\n",
epid, epctx->state);
return CC_CONTEXT_STATE_ERROR;
}
if (xhci_ep_nuke_xfers(xhci, slotid, epid, 0) > 0) {
DPRINTF("xhci: FIXME: endpoint reset w/ xfers running, "
"data might be lost\n");
}
if (!xhci->slots[slotid-1].uport ||
!xhci->slots[slotid-1].uport->dev ||
!xhci->slots[slotid-1].uport->dev->attached) {
return CC_USB_TRANSACTION_ERROR;
}
xhci_set_ep_state(xhci, epctx, NULL, EP_STOPPED);
if (epctx->nr_pstreams) {
xhci_reset_streams(epctx);
}
return CC_SUCCESS;
}
static TRBCCode xhci_set_ep_dequeue(XHCIState *xhci, unsigned int slotid,
unsigned int epid, unsigned int streamid,
uint64_t pdequeue)
{
XHCISlot *slot;
XHCIEPContext *epctx;
XHCIStreamContext *sctx;
dma_addr_t dequeue;
assert(slotid >= 1 && slotid <= xhci->numslots);
if (epid < 1 || epid > 31) {
DPRINTF("xhci: bad ep %d\n", epid);
return CC_TRB_ERROR;
}
trace_usb_xhci_ep_set_dequeue(slotid, epid, streamid, pdequeue);
dequeue = xhci_mask64(pdequeue);
slot = &xhci->slots[slotid-1];
if (!slot->eps[epid-1]) {
DPRINTF("xhci: slot %d ep %d not enabled\n", slotid, epid);
return CC_EP_NOT_ENABLED_ERROR;
}
epctx = slot->eps[epid-1];
if (epctx->state != EP_STOPPED) {
DPRINTF("xhci: set EP dequeue pointer while EP %d not stopped\n", epid);
return CC_CONTEXT_STATE_ERROR;
}
if (epctx->nr_pstreams) {
uint32_t err;
sctx = xhci_find_stream(epctx, streamid, &err);
if (sctx == NULL) {
return err;
}
xhci_ring_init(xhci, &sctx->ring, dequeue & ~0xf);
sctx->ring.ccs = dequeue & 1;
} else {
sctx = NULL;
xhci_ring_init(xhci, &epctx->ring, dequeue & ~0xF);
epctx->ring.ccs = dequeue & 1;
}
xhci_set_ep_state(xhci, epctx, sctx, EP_STOPPED);
return CC_SUCCESS;
}
static int xhci_xfer_create_sgl(XHCITransfer *xfer, int in_xfer)
{
XHCIState *xhci = xfer->epctx->xhci;
int i;
xfer->int_req = false;
qemu_sglist_init(&xfer->sgl, DEVICE(xhci), xfer->trb_count, xhci->as);
for (i = 0; i < xfer->trb_count; i++) {
XHCITRB *trb = &xfer->trbs[i];
dma_addr_t addr;
unsigned int chunk = 0;
if (trb->control & TRB_TR_IOC) {
xfer->int_req = true;
}
switch (TRB_TYPE(*trb)) {
case TR_DATA:
if ((!(trb->control & TRB_TR_DIR)) != (!in_xfer)) {
DPRINTF("xhci: data direction mismatch for TR_DATA\n");
goto err;
}
/* fallthrough */
case TR_NORMAL:
case TR_ISOCH:
addr = xhci_mask64(trb->parameter);
chunk = trb->status & 0x1ffff;
if (trb->control & TRB_TR_IDT) {
if (chunk > 8 || in_xfer) {
DPRINTF("xhci: invalid immediate data TRB\n");
goto err;
}
qemu_sglist_add(&xfer->sgl, trb->addr, chunk);
} else {
qemu_sglist_add(&xfer->sgl, addr, chunk);
}
break;
}
}
return 0;
err:
qemu_sglist_destroy(&xfer->sgl);
xhci_die(xhci);
return -1;
}
static void xhci_xfer_unmap(XHCITransfer *xfer)
{
usb_packet_unmap(&xfer->packet, &xfer->sgl);
qemu_sglist_destroy(&xfer->sgl);
}
static void xhci_xfer_report(XHCITransfer *xfer)
{
uint32_t edtla = 0;
unsigned int left;
bool reported = 0;
bool shortpkt = 0;
XHCIEvent event = {ER_TRANSFER, CC_SUCCESS};
XHCIState *xhci = xfer->epctx->xhci;
int i;
left = xfer->packet.actual_length;
for (i = 0; i < xfer->trb_count; i++) {
XHCITRB *trb = &xfer->trbs[i];
unsigned int chunk = 0;
switch (TRB_TYPE(*trb)) {
case TR_SETUP:
chunk = trb->status & 0x1ffff;
if (chunk > 8) {
chunk = 8;
}
break;
case TR_DATA:
case TR_NORMAL:
case TR_ISOCH:
chunk = trb->status & 0x1ffff;
if (chunk > left) {
chunk = left;
if (xfer->status == CC_SUCCESS) {
shortpkt = 1;
}
}
left -= chunk;
edtla += chunk;
break;
case TR_STATUS:
reported = 0;
shortpkt = 0;
break;
}
if (!reported && ((trb->control & TRB_TR_IOC) ||
(shortpkt && (trb->control & TRB_TR_ISP)) ||
(xfer->status != CC_SUCCESS && left == 0))) {
event.slotid = xfer->epctx->slotid;
event.epid = xfer->epctx->epid;
event.length = (trb->status & 0x1ffff) - chunk;
event.flags = 0;
event.ptr = trb->addr;
if (xfer->status == CC_SUCCESS) {
event.ccode = shortpkt ? CC_SHORT_PACKET : CC_SUCCESS;
} else {
event.ccode = xfer->status;
}
if (TRB_TYPE(*trb) == TR_EVDATA) {
event.ptr = trb->parameter;
event.flags |= TRB_EV_ED;
event.length = edtla & 0xffffff;
DPRINTF("xhci_xfer_data: EDTLA=%d\n", event.length);
edtla = 0;
}
xhci_event(xhci, &event, TRB_INTR(*trb));
reported = 1;
if (xfer->status != CC_SUCCESS) {
return;
}
}
switch (TRB_TYPE(*trb)) {
case TR_SETUP:
reported = 0;
shortpkt = 0;
break;
}
}
}
static void xhci_stall_ep(XHCITransfer *xfer)
{
XHCIEPContext *epctx = xfer->epctx;
XHCIState *xhci = epctx->xhci;
uint32_t err;
XHCIStreamContext *sctx;
if (epctx->type == ET_ISO_IN || epctx->type == ET_ISO_OUT) {
/* never halt isoch endpoints, 4.10.2 */
return;
}
if (epctx->nr_pstreams) {
sctx = xhci_find_stream(epctx, xfer->streamid, &err);
if (sctx == NULL) {
return;
}
sctx->ring.dequeue = xfer->trbs[0].addr;
sctx->ring.ccs = xfer->trbs[0].ccs;
xhci_set_ep_state(xhci, epctx, sctx, EP_HALTED);
} else {
epctx->ring.dequeue = xfer->trbs[0].addr;
epctx->ring.ccs = xfer->trbs[0].ccs;
xhci_set_ep_state(xhci, epctx, NULL, EP_HALTED);
}
}
static int xhci_setup_packet(XHCITransfer *xfer)
{
USBEndpoint *ep;
int dir;
dir = xfer->in_xfer ? USB_TOKEN_IN : USB_TOKEN_OUT;
if (xfer->packet.ep) {
ep = xfer->packet.ep;
} else {
ep = xhci_epid_to_usbep(xfer->epctx);
if (!ep) {
DPRINTF("xhci: slot %d has no device\n",
xfer->epctx->slotid);
return -1;
}
}
xhci_xfer_create_sgl(xfer, dir == USB_TOKEN_IN); /* Also sets int_req */
usb_packet_setup(&xfer->packet, dir, ep, xfer->streamid,
xfer->trbs[0].addr, false, xfer->int_req);
if (usb_packet_map(&xfer->packet, &xfer->sgl)) {
qemu_sglist_destroy(&xfer->sgl);
return -1;
}
DPRINTF("xhci: setup packet pid 0x%x addr %d ep %d\n",
xfer->packet.pid, ep->dev->addr, ep->nr);
return 0;
}
static int xhci_try_complete_packet(XHCITransfer *xfer)
{
if (xfer->packet.status == USB_RET_ASYNC) {
trace_usb_xhci_xfer_async(xfer);
xfer->running_async = 1;
xfer->running_retry = 0;
xfer->complete = 0;
return 0;
} else if (xfer->packet.status == USB_RET_NAK) {
trace_usb_xhci_xfer_nak(xfer);
xfer->running_async = 0;
xfer->running_retry = 1;
xfer->complete = 0;
return 0;
} else {
xfer->running_async = 0;
xfer->running_retry = 0;
xfer->complete = 1;
xhci_xfer_unmap(xfer);
}
if (xfer->packet.status == USB_RET_SUCCESS) {
trace_usb_xhci_xfer_success(xfer, xfer->packet.actual_length);
xfer->status = CC_SUCCESS;
xhci_xfer_report(xfer);
return 0;
}
/* error */
trace_usb_xhci_xfer_error(xfer, xfer->packet.status);
switch (xfer->packet.status) {
case USB_RET_NODEV:
case USB_RET_IOERROR:
xfer->status = CC_USB_TRANSACTION_ERROR;
xhci_xfer_report(xfer);
xhci_stall_ep(xfer);
break;
case USB_RET_STALL:
xfer->status = CC_STALL_ERROR;
xhci_xfer_report(xfer);
xhci_stall_ep(xfer);
break;
case USB_RET_BABBLE:
xfer->status = CC_BABBLE_DETECTED;
xhci_xfer_report(xfer);
xhci_stall_ep(xfer);
break;
default:
DPRINTF("%s: FIXME: status = %d\n", __func__,
xfer->packet.status);
FIXME("unhandled USB_RET_*");
}
return 0;
}
static int xhci_fire_ctl_transfer(XHCIState *xhci, XHCITransfer *xfer)
{
XHCITRB *trb_setup, *trb_status;
uint8_t bmRequestType;
trb_setup = &xfer->trbs[0];
trb_status = &xfer->trbs[xfer->trb_count-1];
trace_usb_xhci_xfer_start(xfer, xfer->epctx->slotid,
xfer->epctx->epid, xfer->streamid);
/* at most one Event Data TRB allowed after STATUS */
if (TRB_TYPE(*trb_status) == TR_EVDATA && xfer->trb_count > 2) {
trb_status--;
}
/* do some sanity checks */
if (TRB_TYPE(*trb_setup) != TR_SETUP) {
DPRINTF("xhci: ep0 first TD not SETUP: %d\n",
TRB_TYPE(*trb_setup));
return -1;
}
if (TRB_TYPE(*trb_status) != TR_STATUS) {
DPRINTF("xhci: ep0 last TD not STATUS: %d\n",
TRB_TYPE(*trb_status));
return -1;
}
if (!(trb_setup->control & TRB_TR_IDT)) {
DPRINTF("xhci: Setup TRB doesn't have IDT set\n");
return -1;
}
if ((trb_setup->status & 0x1ffff) != 8) {
DPRINTF("xhci: Setup TRB has bad length (%d)\n",
(trb_setup->status & 0x1ffff));
return -1;
}
bmRequestType = trb_setup->parameter;
xfer->in_xfer = bmRequestType & USB_DIR_IN;
xfer->iso_xfer = false;
xfer->timed_xfer = false;
if (xhci_setup_packet(xfer) < 0) {
return -1;
}
xfer->packet.parameter = trb_setup->parameter;
usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
xhci_try_complete_packet(xfer);
return 0;
}
static void xhci_calc_intr_kick(XHCIState *xhci, XHCITransfer *xfer,
XHCIEPContext *epctx, uint64_t mfindex)
{
uint64_t asap = ((mfindex + epctx->interval - 1) &
~(epctx->interval-1));
uint64_t kick = epctx->mfindex_last + epctx->interval;
assert(epctx->interval != 0);
xfer->mfindex_kick = MAX(asap, kick);
}
static void xhci_calc_iso_kick(XHCIState *xhci, XHCITransfer *xfer,
XHCIEPContext *epctx, uint64_t mfindex)
{
if (xfer->trbs[0].control & TRB_TR_SIA) {
uint64_t asap = ((mfindex + epctx->interval - 1) &
~(epctx->interval-1));
if (asap >= epctx->mfindex_last &&
asap <= epctx->mfindex_last + epctx->interval * 4) {
xfer->mfindex_kick = epctx->mfindex_last + epctx->interval;
} else {
xfer->mfindex_kick = asap;
}
} else {
xfer->mfindex_kick = ((xfer->trbs[0].control >> TRB_TR_FRAMEID_SHIFT)
& TRB_TR_FRAMEID_MASK) << 3;
xfer->mfindex_kick |= mfindex & ~0x3fff;
if (xfer->mfindex_kick + 0x100 < mfindex) {
xfer->mfindex_kick += 0x4000;
}
}
}
static void xhci_check_intr_iso_kick(XHCIState *xhci, XHCITransfer *xfer,
XHCIEPContext *epctx, uint64_t mfindex)
{
if (xfer->mfindex_kick > mfindex) {
timer_mod(epctx->kick_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
(xfer->mfindex_kick - mfindex) * 125000);
xfer->running_retry = 1;
} else {
epctx->mfindex_last = xfer->mfindex_kick;
timer_del(epctx->kick_timer);
xfer->running_retry = 0;
}
}
static int xhci_submit(XHCIState *xhci, XHCITransfer *xfer, XHCIEPContext *epctx)
{
uint64_t mfindex;
DPRINTF("xhci_submit(slotid=%d,epid=%d)\n", epctx->slotid, epctx->epid);
xfer->in_xfer = epctx->type>>2;
switch(epctx->type) {
case ET_INTR_OUT:
case ET_INTR_IN:
xfer->pkts = 0;
xfer->iso_xfer = false;
xfer->timed_xfer = true;
mfindex = xhci_mfindex_get(xhci);
xhci_calc_intr_kick(xhci, xfer, epctx, mfindex);
xhci_check_intr_iso_kick(xhci, xfer, epctx, mfindex);
if (xfer->running_retry) {
return -1;
}
break;
case ET_BULK_OUT:
case ET_BULK_IN:
xfer->pkts = 0;
xfer->iso_xfer = false;
xfer->timed_xfer = false;
break;
case ET_ISO_OUT:
case ET_ISO_IN:
xfer->pkts = 1;
xfer->iso_xfer = true;
xfer->timed_xfer = true;
mfindex = xhci_mfindex_get(xhci);
xhci_calc_iso_kick(xhci, xfer, epctx, mfindex);
xhci_check_intr_iso_kick(xhci, xfer, epctx, mfindex);
if (xfer->running_retry) {
return -1;
}
break;
default:
trace_usb_xhci_unimplemented("endpoint type", epctx->type);
return -1;
}
if (xhci_setup_packet(xfer) < 0) {
return -1;
}
usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
xhci_try_complete_packet(xfer);
return 0;
}
static int xhci_fire_transfer(XHCIState *xhci, XHCITransfer *xfer, XHCIEPContext *epctx)
{
trace_usb_xhci_xfer_start(xfer, xfer->epctx->slotid,
xfer->epctx->epid, xfer->streamid);
return xhci_submit(xhci, xfer, epctx);
}
static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid,
unsigned int epid, unsigned int streamid)
{
XHCIEPContext *epctx;
assert(slotid >= 1 && slotid <= xhci->numslots);
assert(epid >= 1 && epid <= 31);
if (!xhci->slots[slotid-1].enabled) {
DPRINTF("xhci: xhci_kick_ep for disabled slot %d\n", slotid);
return;
}
epctx = xhci->slots[slotid-1].eps[epid-1];
if (!epctx) {
DPRINTF("xhci: xhci_kick_ep for disabled endpoint %d,%d\n",
epid, slotid);
return;
}
if (epctx->kick_active) {
return;
}
xhci_kick_epctx(epctx, streamid);
}
static bool xhci_slot_ok(XHCIState *xhci, int slotid)
{
return (xhci->slots[slotid - 1].uport &&
xhci->slots[slotid - 1].uport->dev &&
xhci->slots[slotid - 1].uport->dev->attached);
}
static void xhci_kick_epctx(XHCIEPContext *epctx, unsigned int streamid)
{
XHCIState *xhci = epctx->xhci;
XHCIStreamContext *stctx = NULL;
XHCITransfer *xfer;
XHCIRing *ring;
USBEndpoint *ep = NULL;
uint64_t mfindex;
unsigned int count = 0;
int length;
int i;
trace_usb_xhci_ep_kick(epctx->slotid, epctx->epid, streamid);
assert(!epctx->kick_active);
/* If the device has been detached, but the guest has not noticed this
yet the 2 above checks will succeed, but we must NOT continue */
if (!xhci_slot_ok(xhci, epctx->slotid)) {
return;
}
if (epctx->retry) {
xfer = epctx->retry;
trace_usb_xhci_xfer_retry(xfer);
assert(xfer->running_retry);
if (xfer->timed_xfer) {
/* time to kick the transfer? */
mfindex = xhci_mfindex_get(xhci);
xhci_check_intr_iso_kick(xhci, xfer, epctx, mfindex);
if (xfer->running_retry) {
return;
}
xfer->timed_xfer = 0;
xfer->running_retry = 1;
}
if (xfer->iso_xfer) {
/* retry iso transfer */
if (xhci_setup_packet(xfer) < 0) {
return;
}
usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
assert(xfer->packet.status != USB_RET_NAK);
xhci_try_complete_packet(xfer);
} else {
/* retry nak'ed transfer */
if (xhci_setup_packet(xfer) < 0) {
return;
}
usb_handle_packet(xfer->packet.ep->dev, &xfer->packet);
if (xfer->packet.status == USB_RET_NAK) {
xhci_xfer_unmap(xfer);
return;
}
xhci_try_complete_packet(xfer);
}
assert(!xfer->running_retry);
if (xfer->complete) {
/* update ring dequeue ptr */
xhci_set_ep_state(xhci, epctx, stctx, epctx->state);
xhci_ep_free_xfer(epctx->retry);
}
epctx->retry = NULL;
}
if (epctx->state == EP_HALTED) {
DPRINTF("xhci: ep halted, not running schedule\n");
return;
}
if (epctx->nr_pstreams) {
uint32_t err;
stctx = xhci_find_stream(epctx, streamid, &err);
if (stctx == NULL) {
return;
}
ring = &stctx->ring;
xhci_set_ep_state(xhci, epctx, stctx, EP_RUNNING);
} else {
ring = &epctx->ring;
streamid = 0;
xhci_set_ep_state(xhci, epctx, NULL, EP_RUNNING);
}
if (!ring->dequeue) {
return;
}
epctx->kick_active++;
while (1) {
length = xhci_ring_chain_length(xhci, ring);
if (length <= 0) {
if (epctx->type == ET_ISO_OUT || epctx->type == ET_ISO_IN) {
/* 4.10.3.1 */
XHCIEvent ev = { ER_TRANSFER };
ev.ccode = epctx->type == ET_ISO_IN ?
CC_RING_OVERRUN : CC_RING_UNDERRUN;
ev.slotid = epctx->slotid;
ev.epid = epctx->epid;
ev.ptr = epctx->ring.dequeue;
xhci_event(xhci, &ev, xhci->slots[epctx->slotid-1].intr);
}
break;
}
xfer = xhci_ep_alloc_xfer(epctx, length);
if (xfer == NULL) {
break;
}
for (i = 0; i < length; i++) {
TRBType type;
type = xhci_ring_fetch(xhci, ring, &xfer->trbs[i], NULL);
if (!type) {
xhci_die(xhci);
xhci_ep_free_xfer(xfer);
epctx->kick_active--;
return;
}
}
xfer->streamid = streamid;
if (epctx->epid == 1) {
xhci_fire_ctl_transfer(xhci, xfer);
} else {
xhci_fire_transfer(xhci, xfer, epctx);
}
if (!xhci_slot_ok(xhci, epctx->slotid)) {
/* surprise removal -> stop processing */
break;
}
if (xfer->complete) {
/* update ring dequeue ptr */
xhci_set_ep_state(xhci, epctx, stctx, epctx->state);
xhci_ep_free_xfer(xfer);
xfer = NULL;
}
if (epctx->state == EP_HALTED) {
break;
}
if (xfer != NULL && xfer->running_retry) {
DPRINTF("xhci: xfer nacked, stopping schedule\n");
epctx->retry = xfer;
xhci_xfer_unmap(xfer);
break;
}
if (count++ > TRANSFER_LIMIT) {
trace_usb_xhci_enforced_limit("transfers");
break;
}
}
epctx->kick_active--;
ep = xhci_epid_to_usbep(epctx);
if (ep) {
usb_device_flush_ep_queue(ep->dev, ep);
}
}
static TRBCCode xhci_enable_slot(XHCIState *xhci, unsigned int slotid)
{
trace_usb_xhci_slot_enable(slotid);
assert(slotid >= 1 && slotid <= xhci->numslots);
xhci->slots[slotid-1].enabled = 1;
xhci->slots[slotid-1].uport = NULL;
memset(xhci->slots[slotid-1].eps, 0, sizeof(XHCIEPContext*)*31);
return CC_SUCCESS;
}
static TRBCCode xhci_disable_slot(XHCIState *xhci, unsigned int slotid)
{
int i;
trace_usb_xhci_slot_disable(slotid);
assert(slotid >= 1 && slotid <= xhci->numslots);
for (i = 1; i <= 31; i++) {
if (xhci->slots[slotid-1].eps[i-1]) {
xhci_disable_ep(xhci, slotid, i);
}
}
xhci->slots[slotid-1].enabled = 0;
xhci->slots[slotid-1].addressed = 0;
xhci->slots[slotid-1].uport = NULL;
xhci->slots[slotid-1].intr = 0;
return CC_SUCCESS;
}
static USBPort *xhci_lookup_uport(XHCIState *xhci, uint32_t *slot_ctx)
{
USBPort *uport;
char path[32];
int i, pos, port;
port = (slot_ctx[1]>>16) & 0xFF;
if (port < 1 || port > xhci->numports) {
return NULL;
}
port = xhci->ports[port-1].uport->index+1;
pos = snprintf(path, sizeof(path), "%d", port);
for (i = 0; i < 5; i++) {
port = (slot_ctx[0] >> 4*i) & 0x0f;
if (!port) {
break;
}
pos += snprintf(path + pos, sizeof(path) - pos, ".%d", port);
}
QTAILQ_FOREACH(uport, &xhci->bus.used, next) {
if (strcmp(uport->path, path) == 0) {
return uport;
}
}
return NULL;
}
static TRBCCode xhci_address_slot(XHCIState *xhci, unsigned int slotid,
uint64_t pictx, bool bsr)
{
XHCISlot *slot;
USBPort *uport;
USBDevice *dev;
dma_addr_t ictx, octx, dcbaap;
uint64_t poctx;
uint32_t ictl_ctx[2];
uint32_t slot_ctx[4];
uint32_t ep0_ctx[5];
int i;
TRBCCode res;
assert(slotid >= 1 && slotid <= xhci->numslots);
dcbaap = xhci_addr64(xhci->dcbaap_low, xhci->dcbaap_high);
ldq_le_dma(xhci->as, dcbaap + 8 * slotid, &poctx, MEMTXATTRS_UNSPECIFIED);
ictx = xhci_mask64(pictx);
octx = xhci_mask64(poctx);
DPRINTF("xhci: input context at "DMA_ADDR_FMT"\n", ictx);
DPRINTF("xhci: output context at "DMA_ADDR_FMT"\n", octx);
xhci_dma_read_u32s(xhci, ictx, ictl_ctx, sizeof(ictl_ctx));
if (ictl_ctx[0] != 0x0 || ictl_ctx[1] != 0x3) {
DPRINTF("xhci: invalid input context control %08x %08x\n",
ictl_ctx[0], ictl_ctx[1]);
return CC_TRB_ERROR;
}
xhci_dma_read_u32s(xhci, ictx+32, slot_ctx, sizeof(slot_ctx));
xhci_dma_read_u32s(xhci, ictx+64, ep0_ctx, sizeof(ep0_ctx));
DPRINTF("xhci: input slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
DPRINTF("xhci: input ep0 context: %08x %08x %08x %08x %08x\n",
ep0_ctx[0], ep0_ctx[1], ep0_ctx[2], ep0_ctx[3], ep0_ctx[4]);
uport = xhci_lookup_uport(xhci, slot_ctx);
if (uport == NULL) {
DPRINTF("xhci: port not found\n");
return CC_TRB_ERROR;
}
trace_usb_xhci_slot_address(slotid, uport->path);
dev = uport->dev;
if (!dev || !dev->attached) {
DPRINTF("xhci: port %s not connected\n", uport->path);
return CC_USB_TRANSACTION_ERROR;
}
for (i = 0; i < xhci->numslots; i++) {
if (i == slotid-1) {
continue;
}
if (xhci->slots[i].uport == uport) {
DPRINTF("xhci: port %s already assigned to slot %d\n",
uport->path, i+1);
return CC_TRB_ERROR;
}
}
slot = &xhci->slots[slotid-1];
slot->uport = uport;
slot->ctx = octx;
slot->intr = get_field(slot_ctx[2], TRB_INTR);
/* Make sure device is in USB_STATE_DEFAULT state */
usb_device_reset(dev);
if (bsr) {
slot_ctx[3] = SLOT_DEFAULT << SLOT_STATE_SHIFT;
} else {
USBPacket p;
uint8_t buf[1];
slot_ctx[3] = (SLOT_ADDRESSED << SLOT_STATE_SHIFT) | slotid;
memset(&p, 0, sizeof(p));
usb_packet_addbuf(&p, buf, sizeof(buf));
usb_packet_setup(&p, USB_TOKEN_OUT,
usb_ep_get(dev, USB_TOKEN_OUT, 0), 0,
0, false, false);
usb_device_handle_control(dev, &p,
DeviceOutRequest | USB_REQ_SET_ADDRESS,
slotid, 0, 0, NULL);
assert(p.status != USB_RET_ASYNC);
usb_packet_cleanup(&p);
}
res = xhci_enable_ep(xhci, slotid, 1, octx+32, ep0_ctx);
DPRINTF("xhci: output slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
DPRINTF("xhci: output ep0 context: %08x %08x %08x %08x %08x\n",
ep0_ctx[0], ep0_ctx[1], ep0_ctx[2], ep0_ctx[3], ep0_ctx[4]);
xhci_dma_write_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
xhci_dma_write_u32s(xhci, octx+32, ep0_ctx, sizeof(ep0_ctx));
xhci->slots[slotid-1].addressed = 1;
return res;
}
static TRBCCode xhci_configure_slot(XHCIState *xhci, unsigned int slotid,
uint64_t pictx, bool dc)
{
dma_addr_t ictx, octx;
uint32_t ictl_ctx[2];
uint32_t slot_ctx[4];
uint32_t islot_ctx[4];
uint32_t ep_ctx[5];
int i;
TRBCCode res;
trace_usb_xhci_slot_configure(slotid);
assert(slotid >= 1 && slotid <= xhci->numslots);
ictx = xhci_mask64(pictx);
octx = xhci->slots[slotid-1].ctx;
DPRINTF("xhci: input context at "DMA_ADDR_FMT"\n", ictx);
DPRINTF("xhci: output context at "DMA_ADDR_FMT"\n", octx);
if (dc) {
for (i = 2; i <= 31; i++) {
if (xhci->slots[slotid-1].eps[i-1]) {
xhci_disable_ep(xhci, slotid, i);
}
}
xhci_dma_read_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
slot_ctx[3] &= ~(SLOT_STATE_MASK << SLOT_STATE_SHIFT);
slot_ctx[3] |= SLOT_ADDRESSED << SLOT_STATE_SHIFT;
DPRINTF("xhci: output slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
xhci_dma_write_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
return CC_SUCCESS;
}
xhci_dma_read_u32s(xhci, ictx, ictl_ctx, sizeof(ictl_ctx));
if ((ictl_ctx[0] & 0x3) != 0x0 || (ictl_ctx[1] & 0x3) != 0x1) {
DPRINTF("xhci: invalid input context control %08x %08x\n",
ictl_ctx[0], ictl_ctx[1]);
return CC_TRB_ERROR;
}
xhci_dma_read_u32s(xhci, ictx+32, islot_ctx, sizeof(islot_ctx));
xhci_dma_read_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
if (SLOT_STATE(slot_ctx[3]) < SLOT_ADDRESSED) {
DPRINTF("xhci: invalid slot state %08x\n", slot_ctx[3]);
return CC_CONTEXT_STATE_ERROR;
}
xhci_free_device_streams(xhci, slotid, ictl_ctx[0] | ictl_ctx[1]);
for (i = 2; i <= 31; i++) {
if (ictl_ctx[0] & (1<<i)) {
xhci_disable_ep(xhci, slotid, i);
}
if (ictl_ctx[1] & (1<<i)) {
xhci_dma_read_u32s(xhci, ictx+32+(32*i), ep_ctx, sizeof(ep_ctx));
DPRINTF("xhci: input ep%d.%d context: %08x %08x %08x %08x %08x\n",
i/2, i%2, ep_ctx[0], ep_ctx[1], ep_ctx[2],
ep_ctx[3], ep_ctx[4]);
xhci_disable_ep(xhci, slotid, i);
res = xhci_enable_ep(xhci, slotid, i, octx+(32*i), ep_ctx);
if (res != CC_SUCCESS) {
return res;
}
DPRINTF("xhci: output ep%d.%d context: %08x %08x %08x %08x %08x\n",
i/2, i%2, ep_ctx[0], ep_ctx[1], ep_ctx[2],
ep_ctx[3], ep_ctx[4]);
xhci_dma_write_u32s(xhci, octx+(32*i), ep_ctx, sizeof(ep_ctx));
}
}
res = xhci_alloc_device_streams(xhci, slotid, ictl_ctx[1]);
if (res != CC_SUCCESS) {
for (i = 2; i <= 31; i++) {
if (ictl_ctx[1] & (1u << i)) {
xhci_disable_ep(xhci, slotid, i);
}
}
return res;
}
slot_ctx[3] &= ~(SLOT_STATE_MASK << SLOT_STATE_SHIFT);
slot_ctx[3] |= SLOT_CONFIGURED << SLOT_STATE_SHIFT;
slot_ctx[0] &= ~(SLOT_CONTEXT_ENTRIES_MASK << SLOT_CONTEXT_ENTRIES_SHIFT);
slot_ctx[0] |= islot_ctx[0] & (SLOT_CONTEXT_ENTRIES_MASK <<
SLOT_CONTEXT_ENTRIES_SHIFT);
DPRINTF("xhci: output slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
xhci_dma_write_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
return CC_SUCCESS;
}
static TRBCCode xhci_evaluate_slot(XHCIState *xhci, unsigned int slotid,
uint64_t pictx)
{
dma_addr_t ictx, octx;
uint32_t ictl_ctx[2];
uint32_t iep0_ctx[5];
uint32_t ep0_ctx[5];
uint32_t islot_ctx[4];
uint32_t slot_ctx[4];
trace_usb_xhci_slot_evaluate(slotid);
assert(slotid >= 1 && slotid <= xhci->numslots);
ictx = xhci_mask64(pictx);
octx = xhci->slots[slotid-1].ctx;
DPRINTF("xhci: input context at "DMA_ADDR_FMT"\n", ictx);
DPRINTF("xhci: output context at "DMA_ADDR_FMT"\n", octx);
xhci_dma_read_u32s(xhci, ictx, ictl_ctx, sizeof(ictl_ctx));
if (ictl_ctx[0] != 0x0 || ictl_ctx[1] & ~0x3) {
DPRINTF("xhci: invalid input context control %08x %08x\n",
ictl_ctx[0], ictl_ctx[1]);
return CC_TRB_ERROR;
}
if (ictl_ctx[1] & 0x1) {
xhci_dma_read_u32s(xhci, ictx+32, islot_ctx, sizeof(islot_ctx));
DPRINTF("xhci: input slot context: %08x %08x %08x %08x\n",
islot_ctx[0], islot_ctx[1], islot_ctx[2], islot_ctx[3]);
xhci_dma_read_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
slot_ctx[1] &= ~0xFFFF; /* max exit latency */
slot_ctx[1] |= islot_ctx[1] & 0xFFFF;
/* update interrupter target field */
xhci->slots[slotid-1].intr = get_field(islot_ctx[2], TRB_INTR);
set_field(&slot_ctx[2], xhci->slots[slotid-1].intr, TRB_INTR);
DPRINTF("xhci: output slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
xhci_dma_write_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
}
if (ictl_ctx[1] & 0x2) {
xhci_dma_read_u32s(xhci, ictx+64, iep0_ctx, sizeof(iep0_ctx));
DPRINTF("xhci: input ep0 context: %08x %08x %08x %08x %08x\n",
iep0_ctx[0], iep0_ctx[1], iep0_ctx[2],
iep0_ctx[3], iep0_ctx[4]);
xhci_dma_read_u32s(xhci, octx+32, ep0_ctx, sizeof(ep0_ctx));
ep0_ctx[1] &= ~0xFFFF0000; /* max packet size*/
ep0_ctx[1] |= iep0_ctx[1] & 0xFFFF0000;
DPRINTF("xhci: output ep0 context: %08x %08x %08x %08x %08x\n",
ep0_ctx[0], ep0_ctx[1], ep0_ctx[2], ep0_ctx[3], ep0_ctx[4]);
xhci_dma_write_u32s(xhci, octx+32, ep0_ctx, sizeof(ep0_ctx));
}
return CC_SUCCESS;
}
static TRBCCode xhci_reset_slot(XHCIState *xhci, unsigned int slotid)
{
uint32_t slot_ctx[4];
dma_addr_t octx;
int i;
trace_usb_xhci_slot_reset(slotid);
assert(slotid >= 1 && slotid <= xhci->numslots);
octx = xhci->slots[slotid-1].ctx;
DPRINTF("xhci: output context at "DMA_ADDR_FMT"\n", octx);
for (i = 2; i <= 31; i++) {
if (xhci->slots[slotid-1].eps[i-1]) {
xhci_disable_ep(xhci, slotid, i);
}
}
xhci_dma_read_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
slot_ctx[3] &= ~(SLOT_STATE_MASK << SLOT_STATE_SHIFT);
slot_ctx[3] |= SLOT_DEFAULT << SLOT_STATE_SHIFT;
DPRINTF("xhci: output slot context: %08x %08x %08x %08x\n",
slot_ctx[0], slot_ctx[1], slot_ctx[2], slot_ctx[3]);
xhci_dma_write_u32s(xhci, octx, slot_ctx, sizeof(slot_ctx));
return CC_SUCCESS;
}
static unsigned int xhci_get_slot(XHCIState *xhci, XHCIEvent *event, XHCITRB *trb)
{
unsigned int slotid;
slotid = (trb->control >> TRB_CR_SLOTID_SHIFT) & TRB_CR_SLOTID_MASK;
if (slotid < 1 || slotid > xhci->numslots) {
DPRINTF("xhci: bad slot id %d\n", slotid);
event->ccode = CC_TRB_ERROR;
return 0;
} else if (!xhci->slots[slotid-1].enabled) {
DPRINTF("xhci: slot id %d not enabled\n", slotid);
event->ccode = CC_SLOT_NOT_ENABLED_ERROR;
return 0;
}
return slotid;
}
/* cleanup slot state on usb device detach */
static void xhci_detach_slot(XHCIState *xhci, USBPort *uport)
{
int slot, ep;
for (slot = 0; slot < xhci->numslots; slot++) {
if (xhci->slots[slot].uport == uport) {
break;
}
}
if (slot == xhci->numslots) {
return;
}
for (ep = 0; ep < 31; ep++) {
if (xhci->slots[slot].eps[ep]) {
xhci_ep_nuke_xfers(xhci, slot + 1, ep + 1, 0);
}
}
xhci->slots[slot].uport = NULL;
}
static TRBCCode xhci_get_port_bandwidth(XHCIState *xhci, uint64_t pctx)
{
dma_addr_t ctx;
DPRINTF("xhci_get_port_bandwidth()\n");
ctx = xhci_mask64(pctx);
DPRINTF("xhci: bandwidth context at "DMA_ADDR_FMT"\n", ctx);
/* TODO: actually implement real values here. This is 80% for all ports. */
if (stb_dma(xhci->as, ctx, 0, MEMTXATTRS_UNSPECIFIED) != MEMTX_OK ||
dma_memory_set(xhci->as, ctx + 1, 80, xhci->numports,
MEMTXATTRS_UNSPECIFIED) != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA memory write failed!\n",
__func__);
return CC_TRB_ERROR;
}
return CC_SUCCESS;
}
static uint32_t rotl(uint32_t v, unsigned count)
{
count &= 31;
return (v << count) | (v >> (32 - count));
}
static uint32_t xhci_nec_challenge(uint32_t hi, uint32_t lo)
{
uint32_t val;
val = rotl(lo - 0x49434878, 32 - ((hi>>8) & 0x1F));
val += rotl(lo + 0x49434878, hi & 0x1F);
val -= rotl(hi ^ 0x49434878, (lo >> 16) & 0x1F);
return ~val;
}
static void xhci_process_commands(XHCIState *xhci)
{
XHCITRB trb;
TRBType type;
XHCIEvent event = {ER_COMMAND_COMPLETE, CC_SUCCESS};
dma_addr_t addr;
unsigned int i, slotid = 0, count = 0;
DPRINTF("xhci_process_commands()\n");
if (!xhci_running(xhci)) {
DPRINTF("xhci_process_commands() called while xHC stopped or paused\n");
return;
}
xhci->crcr_low |= CRCR_CRR;
while ((type = xhci_ring_fetch(xhci, &xhci->cmd_ring, &trb, &addr))) {
event.ptr = addr;
switch (type) {
case CR_ENABLE_SLOT:
for (i = 0; i < xhci->numslots; i++) {
if (!xhci->slots[i].enabled) {
break;
}
}
if (i >= xhci->numslots) {
DPRINTF("xhci: no device slots available\n");
event.ccode = CC_NO_SLOTS_ERROR;
} else {
slotid = i+1;
event.ccode = xhci_enable_slot(xhci, slotid);
}
break;
case CR_DISABLE_SLOT:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
event.ccode = xhci_disable_slot(xhci, slotid);
}
break;
case CR_ADDRESS_DEVICE:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
event.ccode = xhci_address_slot(xhci, slotid, trb.parameter,
trb.control & TRB_CR_BSR);
}
break;
case CR_CONFIGURE_ENDPOINT:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
event.ccode = xhci_configure_slot(xhci, slotid, trb.parameter,
trb.control & TRB_CR_DC);
}
break;
case CR_EVALUATE_CONTEXT:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
event.ccode = xhci_evaluate_slot(xhci, slotid, trb.parameter);
}
break;
case CR_STOP_ENDPOINT:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
unsigned int epid = (trb.control >> TRB_CR_EPID_SHIFT)
& TRB_CR_EPID_MASK;
event.ccode = xhci_stop_ep(xhci, slotid, epid);
}
break;
case CR_RESET_ENDPOINT:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
unsigned int epid = (trb.control >> TRB_CR_EPID_SHIFT)
& TRB_CR_EPID_MASK;
event.ccode = xhci_reset_ep(xhci, slotid, epid);
}
break;
case CR_SET_TR_DEQUEUE:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
unsigned int epid = (trb.control >> TRB_CR_EPID_SHIFT)
& TRB_CR_EPID_MASK;
unsigned int streamid = (trb.status >> 16) & 0xffff;
event.ccode = xhci_set_ep_dequeue(xhci, slotid,
epid, streamid,
trb.parameter);
}
break;
case CR_RESET_DEVICE:
slotid = xhci_get_slot(xhci, &event, &trb);
if (slotid) {
event.ccode = xhci_reset_slot(xhci, slotid);
}
break;
case CR_GET_PORT_BANDWIDTH:
event.ccode = xhci_get_port_bandwidth(xhci, trb.parameter);
break;
case CR_NOOP:
event.ccode = CC_SUCCESS;
break;
case CR_VENDOR_NEC_FIRMWARE_REVISION:
if (xhci->nec_quirks) {
event.type = 48; /* NEC reply */
event.length = 0x3034;
} else {
event.ccode = CC_TRB_ERROR;
}
break;
case CR_VENDOR_NEC_CHALLENGE_RESPONSE:
if (xhci->nec_quirks) {
uint32_t chi = trb.parameter >> 32;
uint32_t clo = trb.parameter;
uint32_t val = xhci_nec_challenge(chi, clo);
event.length = val & 0xFFFF;
event.epid = val >> 16;
slotid = val >> 24;
event.type = 48; /* NEC reply */
} else {
event.ccode = CC_TRB_ERROR;
}
break;
default:
trace_usb_xhci_unimplemented("command", type);
event.ccode = CC_TRB_ERROR;
break;
}
event.slotid = slotid;
xhci_event(xhci, &event, 0);
if (count++ > COMMAND_LIMIT) {
trace_usb_xhci_enforced_limit("commands");
return;
}
}
}
static bool xhci_port_have_device(XHCIPort *port)
{
if (!port->uport->dev || !port->uport->dev->attached) {
return false; /* no device present */
}
if (!((1 << port->uport->dev->speed) & port->speedmask)) {
return false; /* speed mismatch */
}
return true;
}
static void xhci_port_notify(XHCIPort *port, uint32_t bits)
{
XHCIEvent ev = { ER_PORT_STATUS_CHANGE, CC_SUCCESS,
port->portnr << 24 };
if ((port->portsc & bits) == bits) {
return;
}
trace_usb_xhci_port_notify(port->portnr, bits);
port->portsc |= bits;
if (!xhci_running(port->xhci)) {
return;
}
xhci_event(port->xhci, &ev, 0);
}
static void xhci_port_update(XHCIPort *port, int is_detach)
{
uint32_t pls = PLS_RX_DETECT;
assert(port);
port->portsc = PORTSC_PP;
if (!is_detach && xhci_port_have_device(port)) {
port->portsc |= PORTSC_CCS;
switch (port->uport->dev->speed) {
case USB_SPEED_LOW:
port->portsc |= PORTSC_SPEED_LOW;
pls = PLS_POLLING;
break;
case USB_SPEED_FULL:
port->portsc |= PORTSC_SPEED_FULL;
pls = PLS_POLLING;
break;
case USB_SPEED_HIGH:
port->portsc |= PORTSC_SPEED_HIGH;
pls = PLS_POLLING;
break;
case USB_SPEED_SUPER:
port->portsc |= PORTSC_SPEED_SUPER;
port->portsc |= PORTSC_PED;
pls = PLS_U0;
break;
}
}
set_field(&port->portsc, pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, pls);
xhci_port_notify(port, PORTSC_CSC);
}
static void xhci_port_reset(XHCIPort *port, bool warm_reset)
{
trace_usb_xhci_port_reset(port->portnr, warm_reset);
if (!xhci_port_have_device(port)) {
return;
}
usb_device_reset(port->uport->dev);
switch (port->uport->dev->speed) {
case USB_SPEED_SUPER:
if (warm_reset) {
port->portsc |= PORTSC_WRC;
}
/* fall through */
case USB_SPEED_LOW:
case USB_SPEED_FULL:
case USB_SPEED_HIGH:
set_field(&port->portsc, PLS_U0, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, PLS_U0);
port->portsc |= PORTSC_PED;
break;
}
port->portsc &= ~PORTSC_PR;
xhci_port_notify(port, PORTSC_PRC);
}
static void xhci_reset(DeviceState *dev)
{
XHCIState *xhci = XHCI(dev);
int i;
trace_usb_xhci_reset();
if (!(xhci->usbsts & USBSTS_HCH)) {
DPRINTF("xhci: reset while running!\n");
}
xhci->usbcmd = 0;
xhci->usbsts = USBSTS_HCH;
xhci->dnctrl = 0;
xhci->crcr_low = 0;
xhci->crcr_high = 0;
xhci->dcbaap_low = 0;
xhci->dcbaap_high = 0;
xhci->config = 0;
for (i = 0; i < xhci->numslots; i++) {
xhci_disable_slot(xhci, i+1);
}
for (i = 0; i < xhci->numports; i++) {
xhci_port_update(xhci->ports + i, 0);
}
for (i = 0; i < xhci->numintrs; i++) {
xhci->intr[i].iman = 0;
xhci->intr[i].imod = 0;
xhci->intr[i].erstsz = 0;
xhci->intr[i].erstba_low = 0;
xhci->intr[i].erstba_high = 0;
xhci->intr[i].erdp_low = 0;
xhci->intr[i].erdp_high = 0;
xhci->intr[i].er_ep_idx = 0;
xhci->intr[i].er_pcs = 1;
xhci->intr[i].ev_buffer_put = 0;
xhci->intr[i].ev_buffer_get = 0;
}
xhci->mfindex_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
xhci_mfwrap_update(xhci);
}
static uint64_t xhci_cap_read(void *ptr, hwaddr reg, unsigned size)
{
XHCIState *xhci = ptr;
uint32_t ret;
switch (reg) {
case 0x00: /* HCIVERSION, CAPLENGTH */
ret = 0x01000000 | LEN_CAP;
break;
case 0x04: /* HCSPARAMS 1 */
ret = ((xhci->numports_2+xhci->numports_3)<<24)
| (xhci->numintrs<<8) | xhci->numslots;
break;
case 0x08: /* HCSPARAMS 2 */
ret = 0x0000000f;
break;
case 0x0c: /* HCSPARAMS 3 */
ret = 0x00000000;
break;
case 0x10: /* HCCPARAMS */
if (sizeof(dma_addr_t) == 4) {
ret = 0x00080000 | (xhci->max_pstreams_mask << 12);
} else {
ret = 0x00080001 | (xhci->max_pstreams_mask << 12);
}
break;
case 0x14: /* DBOFF */
ret = OFF_DOORBELL;
break;
case 0x18: /* RTSOFF */
ret = OFF_RUNTIME;
break;
/* extended capabilities */
case 0x20: /* Supported Protocol:00 */
ret = 0x02000402; /* USB 2.0 */
break;
case 0x24: /* Supported Protocol:04 */
ret = 0x20425355; /* "USB " */
break;
case 0x28: /* Supported Protocol:08 */
ret = (xhci->numports_2 << 8) | (xhci->numports_3 + 1);
break;
case 0x2c: /* Supported Protocol:0c */
ret = 0x00000000; /* reserved */
break;
case 0x30: /* Supported Protocol:00 */
ret = 0x03000002; /* USB 3.0 */
break;
case 0x34: /* Supported Protocol:04 */
ret = 0x20425355; /* "USB " */
break;
case 0x38: /* Supported Protocol:08 */
ret = (xhci->numports_3 << 8) | 1;
break;
case 0x3c: /* Supported Protocol:0c */
ret = 0x00000000; /* reserved */
break;
default:
trace_usb_xhci_unimplemented("cap read", reg);
ret = 0;
}
trace_usb_xhci_cap_read(reg, ret);
return ret;
}
static uint64_t xhci_port_read(void *ptr, hwaddr reg, unsigned size)
{
XHCIPort *port = ptr;
uint32_t ret;
switch (reg) {
case 0x00: /* PORTSC */
ret = port->portsc;
break;
case 0x04: /* PORTPMSC */
case 0x08: /* PORTLI */
ret = 0;
break;
case 0x0c: /* reserved */
default:
trace_usb_xhci_unimplemented("port read", reg);
ret = 0;
}
trace_usb_xhci_port_read(port->portnr, reg, ret);
return ret;
}
static void xhci_port_write(void *ptr, hwaddr reg,
uint64_t val, unsigned size)
{
XHCIPort *port = ptr;
uint32_t portsc, notify;
trace_usb_xhci_port_write(port->portnr, reg, val);
switch (reg) {
case 0x00: /* PORTSC */
/* write-1-to-start bits */
if (val & PORTSC_WPR) {
xhci_port_reset(port, true);
break;
}
if (val & PORTSC_PR) {
xhci_port_reset(port, false);
break;
}
portsc = port->portsc;
notify = 0;
/* write-1-to-clear bits*/
portsc &= ~(val & (PORTSC_CSC|PORTSC_PEC|PORTSC_WRC|PORTSC_OCC|
PORTSC_PRC|PORTSC_PLC|PORTSC_CEC));
if (val & PORTSC_LWS) {
/* overwrite PLS only when LWS=1 */
uint32_t old_pls = get_field(port->portsc, PORTSC_PLS);
uint32_t new_pls = get_field(val, PORTSC_PLS);
switch (new_pls) {
case PLS_U0:
if (old_pls != PLS_U0) {
set_field(&portsc, new_pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, new_pls);
notify = PORTSC_PLC;
}
break;
case PLS_U3:
if (old_pls < PLS_U3) {
set_field(&portsc, new_pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, new_pls);
}
break;
case PLS_RESUME:
/* windows does this for some reason, don't spam stderr */
break;
default:
DPRINTF("%s: ignore pls write (old %d, new %d)\n",
__func__, old_pls, new_pls);
break;
}
}
/* read/write bits */
portsc &= ~(PORTSC_PP|PORTSC_WCE|PORTSC_WDE|PORTSC_WOE);
portsc |= (val & (PORTSC_PP|PORTSC_WCE|PORTSC_WDE|PORTSC_WOE));
port->portsc = portsc;
if (notify) {
xhci_port_notify(port, notify);
}
break;
case 0x04: /* PORTPMSC */
case 0x08: /* PORTLI */
default:
trace_usb_xhci_unimplemented("port write", reg);
}
}
static uint64_t xhci_oper_read(void *ptr, hwaddr reg, unsigned size)
{
XHCIState *xhci = ptr;
uint32_t ret;
switch (reg) {
case 0x00: /* USBCMD */
ret = xhci->usbcmd;
break;
case 0x04: /* USBSTS */
ret = xhci->usbsts;
break;
case 0x08: /* PAGESIZE */
ret = 1; /* 4KiB */
break;
case 0x14: /* DNCTRL */
ret = xhci->dnctrl;
break;
case 0x18: /* CRCR low */
ret = xhci->crcr_low & ~0xe;
break;
case 0x1c: /* CRCR high */
ret = xhci->crcr_high;
break;
case 0x30: /* DCBAAP low */
ret = xhci->dcbaap_low;
break;
case 0x34: /* DCBAAP high */
ret = xhci->dcbaap_high;
break;
case 0x38: /* CONFIG */
ret = xhci->config;
break;
default:
trace_usb_xhci_unimplemented("oper read", reg);
ret = 0;
}
trace_usb_xhci_oper_read(reg, ret);
return ret;
}
static void xhci_oper_write(void *ptr, hwaddr reg,
uint64_t val, unsigned size)
{
XHCIState *xhci = XHCI(ptr);
trace_usb_xhci_oper_write(reg, val);
switch (reg) {
case 0x00: /* USBCMD */
if ((val & USBCMD_RS) && !(xhci->usbcmd & USBCMD_RS)) {
xhci_run(xhci);
} else if (!(val & USBCMD_RS) && (xhci->usbcmd & USBCMD_RS)) {
xhci_stop(xhci);
}
if (val & USBCMD_CSS) {
/* save state */
xhci->usbsts &= ~USBSTS_SRE;
}
if (val & USBCMD_CRS) {
/* restore state */
xhci->usbsts |= USBSTS_SRE;
}
xhci->usbcmd = val & 0xc0f;
xhci_mfwrap_update(xhci);
if (val & USBCMD_HCRST) {
xhci_reset(DEVICE(xhci));
}
xhci_intr_update(xhci, 0);
break;
case 0x04: /* USBSTS */
/* these bits are write-1-to-clear */
xhci->usbsts &= ~(val & (USBSTS_HSE|USBSTS_EINT|USBSTS_PCD|USBSTS_SRE));
xhci_intr_update(xhci, 0);
break;
case 0x14: /* DNCTRL */
xhci->dnctrl = val & 0xffff;
break;
case 0x18: /* CRCR low */
xhci->crcr_low = (val & 0xffffffcf) | (xhci->crcr_low & CRCR_CRR);
break;
case 0x1c: /* CRCR high */
xhci->crcr_high = val;
if (xhci->crcr_low & (CRCR_CA|CRCR_CS) && (xhci->crcr_low & CRCR_CRR)) {
XHCIEvent event = {ER_COMMAND_COMPLETE, CC_COMMAND_RING_STOPPED};
xhci->crcr_low &= ~CRCR_CRR;
xhci_event(xhci, &event, 0);
DPRINTF("xhci: command ring stopped (CRCR=%08x)\n", xhci->crcr_low);
} else {
dma_addr_t base = xhci_addr64(xhci->crcr_low & ~0x3f, val);
xhci_ring_init(xhci, &xhci->cmd_ring, base);
}
xhci->crcr_low &= ~(CRCR_CA | CRCR_CS);
break;
case 0x30: /* DCBAAP low */
xhci->dcbaap_low = val & 0xffffffc0;
break;
case 0x34: /* DCBAAP high */
xhci->dcbaap_high = val;
break;
case 0x38: /* CONFIG */
xhci->config = val & 0xff;
break;
default:
trace_usb_xhci_unimplemented("oper write", reg);
}
}
static uint64_t xhci_runtime_read(void *ptr, hwaddr reg,
unsigned size)
{
XHCIState *xhci = ptr;
uint32_t ret = 0;
if (reg < 0x20) {
switch (reg) {
case 0x00: /* MFINDEX */
ret = xhci_mfindex_get(xhci) & 0x3fff;
break;
default:
trace_usb_xhci_unimplemented("runtime read", reg);
break;
}
} else {
int v = (reg - 0x20) / 0x20;
XHCIInterrupter *intr = &xhci->intr[v];
switch (reg & 0x1f) {
case 0x00: /* IMAN */
ret = intr->iman;
break;
case 0x04: /* IMOD */
ret = intr->imod;
break;
case 0x08: /* ERSTSZ */
ret = intr->erstsz;
break;
case 0x10: /* ERSTBA low */
ret = intr->erstba_low;
break;
case 0x14: /* ERSTBA high */
ret = intr->erstba_high;
break;
case 0x18: /* ERDP low */
ret = intr->erdp_low;
break;
case 0x1c: /* ERDP high */
ret = intr->erdp_high;
break;
}
}
trace_usb_xhci_runtime_read(reg, ret);
return ret;
}
static void xhci_runtime_write(void *ptr, hwaddr reg,
uint64_t val, unsigned size)
{
XHCIState *xhci = ptr;
XHCIInterrupter *intr;
int v;
trace_usb_xhci_runtime_write(reg, val);
if (reg < 0x20) {
trace_usb_xhci_unimplemented("runtime write", reg);
return;
}
v = (reg - 0x20) / 0x20;
intr = &xhci->intr[v];
switch (reg & 0x1f) {
case 0x00: /* IMAN */
if (val & IMAN_IP) {
intr->iman &= ~IMAN_IP;
}
intr->iman &= ~IMAN_IE;
intr->iman |= val & IMAN_IE;
xhci_intr_update(xhci, v);
break;
case 0x04: /* IMOD */
intr->imod = val;
break;
case 0x08: /* ERSTSZ */
intr->erstsz = val & 0xffff;
break;
case 0x10: /* ERSTBA low */
if (xhci->nec_quirks) {
/* NEC driver bug: it doesn't align this to 64 bytes */
intr->erstba_low = val & 0xfffffff0;
} else {
intr->erstba_low = val & 0xffffffc0;
}
break;
case 0x14: /* ERSTBA high */
intr->erstba_high = val;
xhci_er_reset(xhci, v);
break;
case 0x18: /* ERDP low */
if (val & ERDP_EHB) {
intr->erdp_low &= ~ERDP_EHB;
}
intr->erdp_low = (val & ~ERDP_EHB) | (intr->erdp_low & ERDP_EHB);
if (val & ERDP_EHB) {
dma_addr_t erdp = xhci_addr64(intr->erdp_low, intr->erdp_high);
unsigned int dp_idx = (erdp - intr->er_start) / TRB_SIZE;
if (erdp >= intr->er_start &&
erdp < (intr->er_start + TRB_SIZE * intr->er_size) &&
dp_idx != intr->er_ep_idx) {
xhci_intr_raise(xhci, v);
}
}
break;
case 0x1c: /* ERDP high */
intr->erdp_high = val;
break;
default:
trace_usb_xhci_unimplemented("oper write", reg);
}
}
static uint64_t xhci_doorbell_read(void *ptr, hwaddr reg,
unsigned size)
{
/* doorbells always read as 0 */
trace_usb_xhci_doorbell_read(reg, 0);
return 0;
}
static void xhci_doorbell_write(void *ptr, hwaddr reg,
uint64_t val, unsigned size)
{
XHCIState *xhci = ptr;
unsigned int epid, streamid;
trace_usb_xhci_doorbell_write(reg, val);
if (!xhci_running(xhci)) {
DPRINTF("xhci: wrote doorbell while xHC stopped or paused\n");
return;
}
reg >>= 2;
if (reg == 0) {
if (val == 0) {
xhci_process_commands(xhci);
} else {
DPRINTF("xhci: bad doorbell 0 write: 0x%x\n",
(uint32_t)val);
}
} else {
epid = val & 0xff;
streamid = (val >> 16) & 0xffff;
if (reg > xhci->numslots) {
DPRINTF("xhci: bad doorbell %d\n", (int)reg);
} else if (epid == 0 || epid > 31) {
DPRINTF("xhci: bad doorbell %d write: 0x%x\n",
(int)reg, (uint32_t)val);
} else {
xhci_kick_ep(xhci, reg, epid, streamid);
}
}
}
static void xhci_cap_write(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
/* nothing */
}
static const MemoryRegionOps xhci_cap_ops = {
.read = xhci_cap_read,
.write = xhci_cap_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 4,
.impl.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps xhci_oper_ops = {
.read = xhci_oper_read,
.write = xhci_oper_write,
.valid.min_access_size = 4,
.valid.max_access_size = sizeof(dma_addr_t),
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps xhci_port_ops = {
.read = xhci_port_read,
.write = xhci_port_write,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps xhci_runtime_ops = {
.read = xhci_runtime_read,
.write = xhci_runtime_write,
.valid.min_access_size = 4,
.valid.max_access_size = sizeof(dma_addr_t),
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps xhci_doorbell_ops = {
.read = xhci_doorbell_read,
.write = xhci_doorbell_write,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void xhci_attach(USBPort *usbport)
{
XHCIState *xhci = usbport->opaque;
XHCIPort *port = xhci_lookup_port(xhci, usbport);
xhci_port_update(port, 0);
}
static void xhci_detach(USBPort *usbport)
{
XHCIState *xhci = usbport->opaque;
XHCIPort *port = xhci_lookup_port(xhci, usbport);
xhci_detach_slot(xhci, usbport);
xhci_port_update(port, 1);
}
static void xhci_wakeup(USBPort *usbport)
{
XHCIState *xhci = usbport->opaque;
XHCIPort *port = xhci_lookup_port(xhci, usbport);
assert(port);
if (get_field(port->portsc, PORTSC_PLS) != PLS_U3) {
return;
}
set_field(&port->portsc, PLS_RESUME, PORTSC_PLS);
xhci_port_notify(port, PORTSC_PLC);
}
static void xhci_complete(USBPort *port, USBPacket *packet)
{
XHCITransfer *xfer = container_of(packet, XHCITransfer, packet);
if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
xhci_ep_nuke_one_xfer(xfer, 0);
return;
}
xhci_try_complete_packet(xfer);
xhci_kick_epctx(xfer->epctx, xfer->streamid);
if (xfer->complete) {
xhci_ep_free_xfer(xfer);
}
}
static void xhci_child_detach(USBPort *uport, USBDevice *child)
{
USBBus *bus = usb_bus_from_device(child);
XHCIState *xhci = container_of(bus, XHCIState, bus);
xhci_detach_slot(xhci, child->port);
}
static USBPortOps xhci_uport_ops = {
.attach = xhci_attach,
.detach = xhci_detach,
.wakeup = xhci_wakeup,
.complete = xhci_complete,
.child_detach = xhci_child_detach,
};
static int xhci_find_epid(USBEndpoint *ep)
{
if (ep->nr == 0) {
return 1;
}
if (ep->pid == USB_TOKEN_IN) {
return ep->nr * 2 + 1;
} else {
return ep->nr * 2;
}
}
static USBEndpoint *xhci_epid_to_usbep(XHCIEPContext *epctx)
{
USBPort *uport;
uint32_t token;
if (!epctx) {
return NULL;
}
uport = epctx->xhci->slots[epctx->slotid - 1].uport;
if (!uport || !uport->dev) {
return NULL;
}
token = (epctx->epid & 1) ? USB_TOKEN_IN : USB_TOKEN_OUT;
return usb_ep_get(uport->dev, token, epctx->epid >> 1);
}
static void xhci_wakeup_endpoint(USBBus *bus, USBEndpoint *ep,
unsigned int stream)
{
XHCIState *xhci = container_of(bus, XHCIState, bus);
int slotid;
DPRINTF("%s\n", __func__);
slotid = ep->dev->addr;
if (slotid == 0 || slotid > xhci->numslots ||
!xhci->slots[slotid - 1].enabled) {
DPRINTF("%s: oops, no slot for dev %d\n", __func__, ep->dev->addr);
return;
}
xhci_kick_ep(xhci, slotid, xhci_find_epid(ep), stream);
}
static USBBusOps xhci_bus_ops = {
.wakeup_endpoint = xhci_wakeup_endpoint,
};
static void usb_xhci_init(XHCIState *xhci)
{
XHCIPort *port;
unsigned int i, usbports, speedmask;
xhci->usbsts = USBSTS_HCH;
if (xhci->numports_2 > XHCI_MAXPORTS_2) {
xhci->numports_2 = XHCI_MAXPORTS_2;
}
if (xhci->numports_3 > XHCI_MAXPORTS_3) {
xhci->numports_3 = XHCI_MAXPORTS_3;
}
usbports = MAX(xhci->numports_2, xhci->numports_3);
xhci->numports = xhci->numports_2 + xhci->numports_3;
usb_bus_new(&xhci->bus, sizeof(xhci->bus), &xhci_bus_ops, xhci->hostOpaque);
for (i = 0; i < usbports; i++) {
speedmask = 0;
if (i < xhci->numports_2) {
port = &xhci->ports[i + xhci->numports_3];
port->portnr = i + 1 + xhci->numports_3;
port->uport = &xhci->uports[i];
port->speedmask =
USB_SPEED_MASK_LOW |
USB_SPEED_MASK_FULL |
USB_SPEED_MASK_HIGH;
assert(i < XHCI_MAXPORTS);
snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+1);
speedmask |= port->speedmask;
}
if (i < xhci->numports_3) {
port = &xhci->ports[i];
port->portnr = i + 1;
port->uport = &xhci->uports[i];
port->speedmask = USB_SPEED_MASK_SUPER;
assert(i < XHCI_MAXPORTS);
snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+1);
speedmask |= port->speedmask;
}
usb_register_port(&xhci->bus, &xhci->uports[i], xhci, i,
&xhci_uport_ops, speedmask);
}
}
static void usb_xhci_realize(DeviceState *dev, Error **errp)
{
int i;
XHCIState *xhci = XHCI(dev);
if (xhci->numintrs > XHCI_MAXINTRS) {
xhci->numintrs = XHCI_MAXINTRS;
}
while (xhci->numintrs & (xhci->numintrs - 1)) { /* ! power of 2 */
xhci->numintrs++;
}
if (xhci->numintrs < 1) {
xhci->numintrs = 1;
}
if (xhci->numslots > XHCI_MAXSLOTS) {
xhci->numslots = XHCI_MAXSLOTS;
}
if (xhci->numslots < 1) {
xhci->numslots = 1;
}
if (xhci_get_flag(xhci, XHCI_FLAG_ENABLE_STREAMS)) {
xhci->max_pstreams_mask = 7; /* == 256 primary streams */
} else {
xhci->max_pstreams_mask = 0;
}
usb_xhci_init(xhci);
xhci->mfwrap_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, xhci_mfwrap_timer, xhci);
memory_region_init(&xhci->mem, OBJECT(dev), "xhci", XHCI_LEN_REGS);
memory_region_init_io(&xhci->mem_cap, OBJECT(dev), &xhci_cap_ops, xhci,
"capabilities", LEN_CAP);
memory_region_init_io(&xhci->mem_oper, OBJECT(dev), &xhci_oper_ops, xhci,
"operational", 0x400);
memory_region_init_io(&xhci->mem_runtime, OBJECT(dev), &xhci_runtime_ops,
xhci, "runtime", LEN_RUNTIME);
memory_region_init_io(&xhci->mem_doorbell, OBJECT(dev), &xhci_doorbell_ops,
xhci, "doorbell", LEN_DOORBELL);
memory_region_add_subregion(&xhci->mem, 0, &xhci->mem_cap);
memory_region_add_subregion(&xhci->mem, OFF_OPER, &xhci->mem_oper);
memory_region_add_subregion(&xhci->mem, OFF_RUNTIME, &xhci->mem_runtime);
memory_region_add_subregion(&xhci->mem, OFF_DOORBELL, &xhci->mem_doorbell);
for (i = 0; i < xhci->numports; i++) {
XHCIPort *port = &xhci->ports[i];
uint32_t offset = OFF_OPER + 0x400 + 0x10 * i;
port->xhci = xhci;
memory_region_init_io(&port->mem, OBJECT(dev), &xhci_port_ops, port,
port->name, 0x10);
memory_region_add_subregion(&xhci->mem, offset, &port->mem);
}
}
static void usb_xhci_unrealize(DeviceState *dev)
{
int i;
XHCIState *xhci = XHCI(dev);
trace_usb_xhci_exit();
for (i = 0; i < xhci->numslots; i++) {
xhci_disable_slot(xhci, i + 1);
}
if (xhci->mfwrap_timer) {
timer_free(xhci->mfwrap_timer);
xhci->mfwrap_timer = NULL;
}
memory_region_del_subregion(&xhci->mem, &xhci->mem_cap);
memory_region_del_subregion(&xhci->mem, &xhci->mem_oper);
memory_region_del_subregion(&xhci->mem, &xhci->mem_runtime);
memory_region_del_subregion(&xhci->mem, &xhci->mem_doorbell);
for (i = 0; i < xhci->numports; i++) {
XHCIPort *port = &xhci->ports[i];
memory_region_del_subregion(&xhci->mem, &port->mem);
}
usb_bus_release(&xhci->bus);
}
static int usb_xhci_post_load(void *opaque, int version_id)
{
XHCIState *xhci = opaque;
XHCISlot *slot;
XHCIEPContext *epctx;
dma_addr_t dcbaap, pctx;
uint32_t slot_ctx[4];
uint32_t ep_ctx[5];
int slotid, epid, state;
uint64_t addr;
dcbaap = xhci_addr64(xhci->dcbaap_low, xhci->dcbaap_high);
for (slotid = 1; slotid <= xhci->numslots; slotid++) {
slot = &xhci->slots[slotid-1];
if (!slot->addressed) {
continue;
}
ldq_le_dma(xhci->as, dcbaap + 8 * slotid, &addr, MEMTXATTRS_UNSPECIFIED);
slot->ctx = xhci_mask64(addr);
xhci_dma_read_u32s(xhci, slot->ctx, slot_ctx, sizeof(slot_ctx));
slot->uport = xhci_lookup_uport(xhci, slot_ctx);
if (!slot->uport) {
/* should not happen, but may trigger on guest bugs */
slot->enabled = 0;
slot->addressed = 0;
continue;
}
assert(slot->uport && slot->uport->dev);
for (epid = 1; epid <= 31; epid++) {
pctx = slot->ctx + 32 * epid;
xhci_dma_read_u32s(xhci, pctx, ep_ctx, sizeof(ep_ctx));
state = ep_ctx[0] & EP_STATE_MASK;
if (state == EP_DISABLED) {
continue;
}
epctx = xhci_alloc_epctx(xhci, slotid, epid);
slot->eps[epid-1] = epctx;
xhci_init_epctx(epctx, pctx, ep_ctx);
epctx->state = state;
if (state == EP_RUNNING) {
/* kick endpoint after vmload is finished */
timer_mod(epctx->kick_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
}
}
}
return 0;
}
static const VMStateDescription vmstate_xhci_ring = {
.name = "xhci-ring",
.version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT64(dequeue, XHCIRing),
VMSTATE_BOOL(ccs, XHCIRing),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_xhci_port = {
.name = "xhci-port",
.version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT32(portsc, XHCIPort),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_xhci_slot = {
.name = "xhci-slot",
.version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_BOOL(enabled, XHCISlot),
VMSTATE_BOOL(addressed, XHCISlot),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_xhci_event = {
.name = "xhci-event",
.version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT32(type, XHCIEvent),
VMSTATE_UINT32(ccode, XHCIEvent),
VMSTATE_UINT64(ptr, XHCIEvent),
VMSTATE_UINT32(length, XHCIEvent),
VMSTATE_UINT32(flags, XHCIEvent),
VMSTATE_UINT8(slotid, XHCIEvent),
VMSTATE_UINT8(epid, XHCIEvent),
VMSTATE_END_OF_LIST()
}
};
static bool xhci_er_full(void *opaque, int version_id)
{
return false;
}
static const VMStateDescription vmstate_xhci_intr = {
.name = "xhci-intr",
.version_id = 1,
.fields = (const VMStateField[]) {
/* registers */
VMSTATE_UINT32(iman, XHCIInterrupter),
VMSTATE_UINT32(imod, XHCIInterrupter),
VMSTATE_UINT32(erstsz, XHCIInterrupter),
VMSTATE_UINT32(erstba_low, XHCIInterrupter),
VMSTATE_UINT32(erstba_high, XHCIInterrupter),
VMSTATE_UINT32(erdp_low, XHCIInterrupter),
VMSTATE_UINT32(erdp_high, XHCIInterrupter),
/* state */
VMSTATE_BOOL(msix_used, XHCIInterrupter),
VMSTATE_BOOL(er_pcs, XHCIInterrupter),
VMSTATE_UINT64(er_start, XHCIInterrupter),
VMSTATE_UINT32(er_size, XHCIInterrupter),
VMSTATE_UINT32(er_ep_idx, XHCIInterrupter),
/* event queue (used if ring is full) */
VMSTATE_BOOL(er_full_unused, XHCIInterrupter),
VMSTATE_UINT32_TEST(ev_buffer_put, XHCIInterrupter, xhci_er_full),
VMSTATE_UINT32_TEST(ev_buffer_get, XHCIInterrupter, xhci_er_full),
VMSTATE_STRUCT_ARRAY_TEST(ev_buffer, XHCIInterrupter, EV_QUEUE,
xhci_er_full, 1,
vmstate_xhci_event, XHCIEvent),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_xhci = {
.name = "xhci-core",
.version_id = 1,
.post_load = usb_xhci_post_load,
.fields = (const VMStateField[]) {
VMSTATE_STRUCT_VARRAY_UINT32(ports, XHCIState, numports, 1,
vmstate_xhci_port, XHCIPort),
VMSTATE_STRUCT_VARRAY_UINT32(slots, XHCIState, numslots, 1,
vmstate_xhci_slot, XHCISlot),
VMSTATE_STRUCT_VARRAY_UINT32(intr, XHCIState, numintrs, 1,
vmstate_xhci_intr, XHCIInterrupter),
/* Operational Registers */
VMSTATE_UINT32(usbcmd, XHCIState),
VMSTATE_UINT32(usbsts, XHCIState),
VMSTATE_UINT32(dnctrl, XHCIState),
VMSTATE_UINT32(crcr_low, XHCIState),
VMSTATE_UINT32(crcr_high, XHCIState),
VMSTATE_UINT32(dcbaap_low, XHCIState),
VMSTATE_UINT32(dcbaap_high, XHCIState),
VMSTATE_UINT32(config, XHCIState),
/* Runtime Registers & state */
VMSTATE_INT64(mfindex_start, XHCIState),
VMSTATE_TIMER_PTR(mfwrap_timer, XHCIState),
VMSTATE_STRUCT(cmd_ring, XHCIState, 1, vmstate_xhci_ring, XHCIRing),
VMSTATE_END_OF_LIST()
}
};
static Property xhci_properties[] = {
DEFINE_PROP_BIT("streams", XHCIState, flags,
XHCI_FLAG_ENABLE_STREAMS, true),
DEFINE_PROP_UINT32("p2", XHCIState, numports_2, 4),
DEFINE_PROP_UINT32("p3", XHCIState, numports_3, 4),
DEFINE_PROP_LINK("host", XHCIState, hostOpaque, TYPE_DEVICE,
DeviceState *),
DEFINE_PROP_END_OF_LIST(),
};
static void xhci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = usb_xhci_realize;
dc->unrealize = usb_xhci_unrealize;
device_class_set_legacy_reset(dc, xhci_reset);
device_class_set_props(dc, xhci_properties);
dc->user_creatable = false;
}
static const TypeInfo xhci_info = {
.name = TYPE_XHCI,
.parent = TYPE_DEVICE,
.instance_size = sizeof(XHCIState),
.class_init = xhci_class_init,
};
static void xhci_register_types(void)
{
type_register_static(&xhci_info);
}
type_init(xhci_register_types)