#include <round.h>
#include <stdio.h>
#include <string.h>
-#include <kernel/bitmap.h>
#include "threads/pte.h"
#include "threads/malloc.h"
#include "threads/palloc.h"
#define ptr_to_flp(x) (((uintptr_t)x) >> 4)
#define flp_to_ptr(x) (uintptr_t)(((uintptr_t)x) << 4)
-/* frame structures */
+#define UHCI_LP_POINTER 0xfffffff0 /* Pointer field. */
+#define UHCI_LP_TERMINATE 0x00000001 /* 1=pointer not valid */
+#define UHCI_LP_QUEUE_HEAD 0x00000002 /* 1=points to queue head,
+ 0=points to tx descriptor. */
+#define UHCI_LP_DEPTH 0x00000004 /* Tx descriptor only:
+ 1=execute depth first,
+ 0=execute breadth first. */
#pragma pack(1)
-struct frame_list_ptr
-{
- uint32_t terminate:1;
- uint32_t qh_select:1;
- uint32_t depth_select:1; /* only for TD */
- uint32_t resv:1; /* zero */
- uint32_t flp:28; /* frame list pointer */
-};
-
struct td_token
{
uint32_t pid:8; /* packet id */
struct tx_descriptor
{
- struct frame_list_ptr flp;
+ uint32_t next_td;
struct td_control control;
struct td_token token;
uint32_t buf_ptr;
-
- struct frame_list_ptr *head; /* for fast removal */
uint32_t flags;
+ struct list_elem td_elem; /* Element in queue_head's td_list. */
+ size_t offset;
};
struct queue_head
{
- struct frame_list_ptr qhlp; /* queue head link pointer */
- struct frame_list_ptr qelp; /* queue elem link pointer */
+ uint32_t next_qh; /* Queue head link pointer. */
+ uint32_t first_td; /* Queue element link pointer. */
+
+ struct list_elem qh_elem; /* Element in uhci_info's qh_list. */
+ struct list td_list; /* List of tx_descriptor structures. */
+ struct semaphore completion; /* Upped by interrupt on completion. */
};
#pragma pack()
struct pci_dev *dev;
struct pci_io *io; /* pci io space */
struct lock lock;
- struct frame_list_ptr *frame_list; /* page aligned frame list */
-
- struct tx_descriptor *td_pool;
- struct bitmap *td_used;
- struct queue_head *qh_pool;
- struct bitmap *qh_used;
+ uint32_t *frame_list; /* Page-aligned list of 1024 frame pointers. */
+ struct list qh_list; /* List of queue_head structuress. */
+ struct queue_head *term_qh;
uint8_t num_ports;
uint8_t attached_ports;
-
- int timeouts; /* number of timeouts */
-
- struct semaphore td_sem;
- struct list devices; /* devices on host */
- struct list waiting; /* threads waiting */
};
struct usb_wait
int errors; /* aggregate errors */
struct list_elem peers; /* next dev on host */
struct lock lock;
- struct queue_head *qh;
};
struct uhci_eop_info
static int token_to_pid (int token);
-static int uhci_tx_pkt (host_eop_info eop, int token, void *pkt,
- int min_sz, int max_sz, int *in_sz, bool wait);
-
+static int uhci_dev_control (host_eop_info, struct usb_setup_pkt *,
+ void *data, size_t *size);
+static int uhci_dev_bulk (host_eop_info, bool out, void *data, size_t *size);
static int uhci_detect_change (host_info);
-static int uhci_tx_pkt_now (struct uhci_eop_info *ue, int token, void *pkt,
- int sz);
-static int uhci_tx_pkt_wait (struct uhci_eop_info *ue, int token, void *pkt,
- int max_sz, int *in_sz);
-static int uhci_tx_pkt_bulk (struct uhci_eop_info *ue, int token, void *buf,
- int sz, int *tx);
-
+static struct queue_head *allocate_queue_head (void);
+static struct tx_descriptor *allocate_transfer_descriptor (struct queue_head *);
-static int uhci_process_completed (struct uhci_info *ui);
-static struct tx_descriptor *uhci_acquire_td (struct uhci_info *);
-static void uhci_release_td (struct uhci_info *, struct tx_descriptor *);
-static void uhci_remove_qh (struct uhci_info *ui, struct queue_head *qh);
+static void uhci_process_completed (struct uhci_info *ui);
-static void qh_free (struct uhci_info *ui, struct queue_head *qh);
-static struct queue_head *qh_alloc (struct uhci_info *ui);
static struct uhci_info *uhci_create_info (struct pci_io *io);
static void uhci_destroy_info (struct uhci_info *ui);
static void uhci_destroy_chan (host_dev_info);
static void uhci_modify_chan (host_dev_info, int dev_addr, int ver);
-static struct tx_descriptor *td_from_pool (struct uhci_info *ui, int idx);
-
static int check_and_flip_change (struct uhci_info *ui, int reg);
-static void uhci_stop (struct uhci_info *ui);
-static void uhci_run (struct uhci_info *ui);
-static void uhci_stop_unlocked (struct uhci_info *ui);
-static void uhci_run_unlocked (struct uhci_info *ui);
#define uhci_is_stopped(x) (pci_reg_read16((x)->io, UHCI_REG_USBSTS) \
& USB_STATUS_HALTED)
#define uhci_port_enabled(x, y) (pci_reg_read16((x)->io, (y)) & USB_PORT_ENABLE)
-static void uhci_add_td_to_qh (struct queue_head *qh,
- struct tx_descriptor *td);
-static void uhci_remove_error_td (struct tx_descriptor *td);
static void uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
int eop, void *pkt, int sz, int toggle, bool ls);
static int uhci_enable_port (struct uhci_info *ui, int port);
static void uhci_irq (void *uhci_data);
static void uhci_detect_ports (struct uhci_info *ui);
-static int uhci_remove_stalled (struct uhci_info *ui);
-static void uhci_stall_watchdog (struct uhci_info *ui);
-
-static void dump_all_qh (struct uhci_info *ui);
-static void dump_qh (struct queue_head *qh);
-
static void dump_regs (struct uhci_info *ui);
void uhci_init (void);
static struct usb_host uhci_host = {
.name = "UHCI",
- .tx_pkt = uhci_tx_pkt,
+ .dev_control = uhci_dev_control,
+ .dev_bulk = uhci_dev_bulk,
.detect_change = uhci_detect_change,
.create_dev_channel = uhci_create_chan,
.remove_dev_channel = uhci_destroy_chan,
.remove_eop = uhci_remove_eop
};
+static uint32_t
+make_lp (void *p)
+{
+ uint32_t q = vtop (p);
+ ASSERT ((q & UHCI_LP_POINTER) == q);
+ return q;
+}
+
void
uhci_init (void)
{
{
struct pci_io *io;
struct uhci_info *ui;
- uint8_t sof;
int i;
dev_num++;
ui = uhci_create_info (io);
ui->dev = pd;
- sof = pci_reg_read8 (ui->io, UHCI_REG_SOFMOD);
- uhci_detect_ports (ui);
+ //dump_regs (ui);
- /* reset devices */
- pci_reg_write16 (ui->io, UHCI_REG_USBCMD, USB_CMD_GRESET);
- timer_msleep (50);
- pci_reg_write16 (ui->io, UHCI_REG_USBCMD, 0);
- timer_msleep (1);
+ uhci_detect_ports (ui);
- /* reset controller */
+ pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x8f00);
pci_reg_write16 (ui->io, UHCI_REG_USBCMD, USB_CMD_HCRESET);
- timer_msleep (1);
+ asm volatile ("mfence":::"memory");
+ timer_usleep (5);
if (pci_reg_read16 (ui->io, UHCI_REG_USBCMD) & USB_CMD_HCRESET)
- {
- printf ("UHCI: Reset timed out\n");
- uhci_destroy_info (ui);
- continue;
- }
+ printf ("reset failed!\n");
pci_reg_write16 (ui->io, UHCI_REG_USBINTR, 0);
pci_reg_write16 (ui->io, UHCI_REG_USBCMD, 0);
- for (i = 0; i < ui->num_ports; i++)
- pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + i * 2, 0);
-
- timer_msleep (100);
- printf ("UHCI: Enabling %d root ports\n", ui->num_ports);
- ui->attached_ports = 0;
- for (i = 0; i < ui->num_ports; i++)
- ui->attached_ports += uhci_enable_port (ui, i);
+ pci_reg_write16 (ui->io, UHCI_REG_PORTSC1, 0);
+ pci_reg_write16 (ui->io, UHCI_REG_PORTSC2, 0);
- pci_reg_write8 (ui->io, UHCI_REG_SOFMOD, sof);
+ pci_reg_write8 (ui->io, UHCI_REG_SOFMOD, 64);
+ pci_reg_write32 (ui->io, UHCI_REG_FLBASEADD, make_lp (ui->frame_list));
pci_reg_write16 (ui->io, UHCI_REG_FRNUM, 0);
- pci_reg_write32 (ui->io, UHCI_REG_FLBASEADD, vtop (ui->frame_list));
+ asm volatile ("mfence":::"memory");
+
+ /* deactivate SMM junk, only enable IRQ */
+ pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x2000);
+
+ asm volatile ("mfence":::"memory");
+
+ pci_reg_write16 (ui->io, UHCI_REG_USBCMD,
+ USB_CMD_RS | USB_CMD_CONFIGURE | USB_CMD_MAX_PACKET);
pci_reg_write16 (ui->io, UHCI_REG_USBINTR,
USB_INTR_SHORT | USB_INTR_IOC |
USB_INTR_TIMEOUT | USB_INTR_RESUME);
- /* deactivate SMM junk, only enable IRQ */
- pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x2000);
+ asm volatile ("mfence":::"memory");
- uhci_lock (ui);
- uhci_run (ui);
- uhci_unlock (ui);
+ printf ("UHCI: Enabling %d root ports\n", ui->num_ports);
+ ui->attached_ports = 0;
+ for (i = 0; i < ui->num_ports; i++)
+ ui->attached_ports += uhci_enable_port (ui, i);
pci_register_irq (pd, uhci_irq, ui);
#define UHCI_PORT_TIMEOUT 1000
static int
-uhci_enable_port (struct uhci_info *ui, int port)
+uhci_enable_port (struct uhci_info *ui, int idx)
{
uint16_t status;
+ int time, stable_since;
int count;
+ int port;
- /* individual ports must be reset for QEMU to go into USB_STATE_DEFAULT */
- pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2, USB_PORT_RESET);
- timer_msleep (50);
+ port = UHCI_REG_PORTSC1 + idx * 2;
- /* ACK disconnect from reset so we can see if port is connected */
- pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
- USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
- timer_msleep (10);
- status = pci_reg_read16 (ui->io, UHCI_REG_PORTSC1 + port * 2);
- if (!(status & USB_PORT_CONNECTSTATUS))
+ status = 0xffff;
+ stable_since = 0;
+ for (time = 0; ; time += 25)
{
- return 0;
+ uint16_t new_status;
+ new_status = pci_reg_read16 (ui->io, port);
+ if (status != (new_status & USB_PORT_CONNECTSTATUS)
+ || new_status & USB_PORT_CONNECTCHG)
+ {
+ if (new_status & USB_PORT_CONNECTCHG)
+ pci_reg_write16 (ui->io, port, (new_status & ~0xe80a) | USB_PORT_CONNECTCHG);
+ stable_since = time;
+ status = new_status & USB_PORT_CONNECTSTATUS;
+ }
+ else if (time - stable_since >= 100)
+ break;
+ else if (time >= 1500)
+ return 0;
+ timer_msleep (25);
}
+ //printf ("time=%d stable_since=%d\n", time, stable_since);
+
+ if (!(status & USB_PORT_CONNECTSTATUS))
+ return 0;
- /* ACK CONNECTCHG status so port can be enabled */
- pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
- USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
- for (count = 0; count < UHCI_PORT_TIMEOUT; count++)
+ for (count = 0; count < 3; count++)
{
- if (uhci_port_enabled (ui, UHCI_REG_PORTSC1 + port * 2))
- {
- pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
- USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
- return 1;
- }
+ status = pci_reg_read16 (ui->io, port) & ~0xe80a;
+ //printf ("read %x, write %x, ", status, status | USB_PORT_RESET);
+ pci_reg_write16 (ui->io, port, status | USB_PORT_RESET);
+ timer_msleep (50);
+
+ status = pci_reg_read16 (ui->io, port) & ~0xe80a;
+ //printf ("read %x, write %x, ", status, status & ~USB_PORT_RESET);
+ pci_reg_write16 (ui->io, port, status & ~USB_PORT_RESET);
+ timer_usleep (10);
+
+ status = pci_reg_read16 (ui->io, port) & ~0xe80a;
+ //printf ("read %x, write %x, ", status, status & ~(USB_PORT_CONNECTCHG | USB_PORT_CHANGE));
+ pci_reg_write16 (ui->io, port, status & ~(USB_PORT_CONNECTCHG | USB_PORT_CHANGE));
+
+ status = pci_reg_read16 (ui->io, port) & ~0xe80a;
+ //printf ("read %x, write %x, ", status, status | USB_PORT_ENABLE);
+ pci_reg_write16 (ui->io, port, status | USB_PORT_ENABLE);
+
+ status = pci_reg_read16 (ui->io, port);
+ //printf ("read %x\n", status);
+ if (status & USB_PORT_ENABLE)
+ break;
}
- printf ("UHCI: Port %d enable timed out\n", port);
- dump_regs (ui);
+ if (!(status & USB_PORT_CONNECTSTATUS))
+ {
+ //printf ("port %d not connected\n", idx);
+ pci_reg_write16 (ui->io, port, 0);
+ return 0;
+ }
- return 0;
+ //dump_regs (ui);
+ return 1;
}
char *name[] =
{ "cmd", "sts", "intr", "frnum", "base", "sofmod", "portsc1", "portsc2" };
int i;
- printf ("UHCI registers:\n");
+ printf ("UHCI registers: ");
for (i = 0; i < 8; i++)
{
- printf ("%s: %x\n", name[i], (sz[i] == 2) ?
+ if (i)
+ printf (", ");
+ printf ("%s: %x", name[i], (sz[i] == 2) ?
pci_reg_read16 (ui->io, regs[i]) :
pci_reg_read32 (ui->io, regs[i]));
-
}
+ printf (", legsup=%x\n", pci_read_config16 (ui->dev, UHCI_REG_LEGSUP));
}
uhci_destroy_info (struct uhci_info *ui)
{
palloc_free_page (ui->frame_list);
- palloc_free_page (ui->td_pool);
- palloc_free_page (ui->qh_pool);
- bitmap_destroy (ui->qh_used);
- bitmap_destroy (ui->td_used);
free (ui);
}
uhci_create_info (struct pci_io *io)
{
struct uhci_info *ui;
+ struct queue_head *qh1, *qh2;
+ struct tx_descriptor *td;
int i;
ui = malloc (sizeof (struct uhci_info));
ui->io = io;
lock_init (&ui->lock);
- /* create an empty schedule */
+ /* Create initial queue head and put on qh list. */
+ list_init (&ui->qh_list);
+
+ qh1 = allocate_queue_head ();
+ list_push_back (&ui->qh_list, &qh1->qh_elem);
+
+ ui->term_qh = qh2 = allocate_queue_head ();
+ qh1->next_qh = make_lp (qh2) | UHCI_LP_QUEUE_HEAD;
+
+ td = allocate_transfer_descriptor (qh2);
+ td->token.maxlen = 0x7ff;
+ td->token.dev_addr = 0x7f;
+ td->token.pid = USB_TOKEN_IN;
+
+ /* Create an empty schedule */
ui->frame_list = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
- memset (ui->frame_list, 0, PGSIZE);
for (i = 0; i < FRAME_LIST_ENTRIES; i++)
- ui->frame_list[i].terminate = 1;
+ ui->frame_list[i] = make_lp (qh1) | UHCI_LP_QUEUE_HEAD;
+ //printf ("frame_list=%p: %08x\n", ui->frame_list, ui->frame_list[0]);
- /* permit 3 timeouts */
- ui->timeouts = 3;
// thread_create ("uhci watchdog", PRI_MIN,
// (thread_func *) uhci_stall_watchdog, ui);
- ui->td_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
- ui->td_used = bitmap_create (TD_ENTRIES);
- ui->qh_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
- ui->qh_used = bitmap_create (QH_ENTRIES);
- sema_init (&ui->td_sem, TD_ENTRIES);
-
- list_init (&ui->devices);
- list_init (&ui->waiting);
return ui;
}
+static void
+print_td_list (struct queue_head *qh)
+{
+ struct list_elem *e;
+
+ for (e = list_begin (&qh->td_list); e != list_end (&qh->td_list);
+ e = list_next (e))
+ {
+ struct tx_descriptor *td = list_entry (e, struct tx_descriptor, td_elem);
+ printf (" %08x: next_td=%08x control=%08x %d,%d,%d,%d,%x buf_ptr=%08x\n",
+ vtop (td), td->next_td, *(uint32_t *) &td->control,
+ (td->token.maxlen + 1) & 0x7ff, td->token.data_toggle,
+ td->token.end_point, td->token.dev_addr, td->token.pid,
+ td->buf_ptr);
+ hex_dump (0, ptov (td->buf_ptr), (td->token.maxlen + 1) & 0x7ff, true);
+ }
+}
+
+static void
+print_qh_list (struct uhci_info *ui)
+{
+ struct list_elem *e;
+
+ for (e = list_begin (&ui->qh_list); e != list_end (&ui->qh_list);
+ e = list_next (e))
+ {
+ struct queue_head *qh = list_entry (e, struct queue_head, qh_elem);
+ printf ("%08x: next_qh=%08x first_td=%08x\n",
+ vtop (qh), qh->next_qh, qh->first_td);
+ print_td_list (qh);
+ }
+}
+
+static struct tx_descriptor *
+execute_qh (struct uhci_info *ui, struct queue_head *qh)
+{
+ struct queue_head *prev_qh;
+ struct tx_descriptor *last_td;
+ enum intr_level old_level;
+
+ /* Mark the final tx descriptor to interrupt us when it's
+ done. */
+ last_td = list_entry (list_back (&qh->td_list), struct tx_descriptor, td_elem);
+ last_td->control.ioc = 1;
+
+ qh->next_qh = make_lp (ui->term_qh) | UHCI_LP_QUEUE_HEAD;
+
+ /* Add the queue head to the list of queue heads.
+ qh_list is accessed from uhci_irq so we need to disable
+ interrupts. */
+ old_level = intr_disable ();
+ list_push_back (&ui->qh_list, &qh->qh_elem);
+ prev_qh = list_entry (list_prev (&qh->qh_elem), struct queue_head, qh_elem);
+ prev_qh->next_qh = make_lp (qh) | UHCI_LP_QUEUE_HEAD;
+ print_qh_list (ui);
+ //dump_regs (ui);
+ intr_set_level (old_level);
+
+ /* Wait until the queue has been processed. */
+ //printf ("down...");
+ sema_down (&qh->completion);
+ //printf ("up\n");
+
+
+ /* Return the descriptor that failed, or a null pointer on
+ success. */
+ return (qh->first_td & UHCI_LP_TERMINATE
+ ? NULL
+ : ptov (qh->first_td & UHCI_LP_POINTER));
+}
static int
-uhci_tx_pkt (host_eop_info hei, int token, void *pkt, int min_sz,
- int max_sz, int *in_sz, bool wait)
+uhci_dev_control (host_eop_info hei, struct usb_setup_pkt *setup,
+ void *data, size_t *size)
{
struct uhci_eop_info *ue;
struct uhci_dev_info *ud;
-
- ASSERT (min_sz <= max_sz);
-
- /* can't have page overlap */
- if (pkt != NULL)
- {
- ASSERT (max_sz > 0);
- ASSERT (pg_no (pkt + max_sz - 1) == pg_no (pkt));
- }
+ struct queue_head *qh;
+ struct tx_descriptor *td;
+ size_t size_alloced;
+ int status_token;
+ int err;
ue = hei;
ud = ue->ud;
/* don't bother if ports are down */
if (ud->ui->attached_ports == 0)
+ return USB_HOST_ERR_NODEV;
+
+ qh = allocate_queue_head ();
+ if (qh == NULL)
+ return USB_HOST_ERR_NOMEM;
+
+ /* Setup stage: SETUP packet. */
+ td = allocate_transfer_descriptor (qh);
+ if (td == NULL)
+ return USB_HOST_ERR_NOMEM;
+ ue->toggle = 0;
+ uhci_setup_td (td, ud->dev_addr, USB_TOKEN_SETUP, ue->eop,
+ setup, sizeof *setup, ue->toggle, ud->low_speed);
+
+ /* Data stage: IN/OUT packets. */
+ if (data != NULL)
{
- return USB_HOST_ERR_NODEV;
+ size_alloced = 0;
+ while (size_alloced < *size)
+ {
+ int packet = *size - size_alloced;
+ if (packet > ue->maxpkt)
+ packet = ue->maxpkt;
+
+ td = allocate_transfer_descriptor (qh);
+ if (td == NULL)
+ return USB_HOST_ERR_NOMEM;
+
+ ue->toggle = !ue->toggle;
+ uhci_setup_td (td, ud->dev_addr,
+ setup->direction ? USB_TOKEN_IN : USB_TOKEN_OUT,
+ ue->eop, data + size_alloced, packet,
+ ue->toggle, ud->low_speed);
+ td->control.spd = 1;
+ td->offset = size_alloced;
+
+ size_alloced += packet;
+ }
}
+
+ /* Status stage: OUT/IN packet. */
+ td = allocate_transfer_descriptor (qh);
+ if (td == NULL)
+ return USB_HOST_ERR_NOMEM;
+ ue->toggle = 1;
+ status_token = setup->direction ? USB_TOKEN_OUT : USB_TOKEN_IN;
+ uhci_setup_td (td, ud->dev_addr, status_token, ue->eop,
+ NULL, 0, ue->toggle, ud->low_speed);
+
+ /* Execute. */
+ td = execute_qh (ud->ui, qh);
+ if (td != NULL)
+ ue->toggle = td->token.data_toggle;
+ //printf ("execution done, td=%p\n", td);
+ if (td != NULL
+ && setup->direction
+ && list_front (&qh->td_list) != &td->td_elem
+ && list_back (&qh->td_list) != &td->td_elem
+ && !td->control.active
+ && !td->control.stalled
+ && !td->control.buffer_error
+ && !td->control.babble
+ && !td->control.nak
+ && !td->control.timeout
+ && !td->control.bitstuff
+ && (((td->control.actual_len + 1) & 0x7ff)
+ < ((td->token.maxlen + 1) & 0x7ff)))
+ {
+ /* Short packet detected in stream, which indicates that
+ the input data is shorter than the maximum that we
+ expected.
- /* setup token acts to synchronize data toggle */
- if (token == USB_TOKEN_SETUP)
- ue->toggle = 0;
+ Re-queue the Status stage. */
- if (min_sz != 0)
- {
- return uhci_tx_pkt_bulk (ue, token, pkt, max_sz, in_sz);
+ *size = td->offset + ((td->control.actual_len + 1) & 0x7ff);
+
+ //delayed_free_qh (qh);
+
+ qh = allocate_queue_head ();
+ if (qh == NULL)
+ return USB_HOST_ERR_NOMEM;
+
+ td = allocate_transfer_descriptor (qh);
+ if (td == NULL)
+ return USB_HOST_ERR_NOMEM;
+ ue->toggle = 1;
+ uhci_setup_td (td, ud->dev_addr, status_token, ue->eop,
+ NULL, 0, ue->toggle, ud->low_speed);
+
+ //printf ("short packet, requeuing status\n");
+ td = execute_qh (ud->ui, qh);
+ if (td != NULL)
+ ue->toggle = td->token.data_toggle;
}
- else
+
+ if (td != NULL)
{
- if (wait == false)
- {
- if (in_sz != NULL)
- *in_sz = max_sz;
- return uhci_tx_pkt_now (ue, token, pkt, max_sz);
- }
+ if (td->control.bitstuff)
+ err = USB_HOST_ERR_BITSTUFF;
+ else if (td->control.timeout)
+ err = USB_HOST_ERR_TIMEOUT;
+ else if (td->control.nak)
+ err = USB_HOST_ERR_NAK;
+ else if (td->control.babble)
+ err = USB_HOST_ERR_BABBLE;
+ else if (td->control.buffer_error)
+ err = USB_HOST_ERR_BUFFER;
+ else if (td->control.stalled)
+ err = USB_HOST_ERR_STALL;
else
- {
- return uhci_tx_pkt_wait (ue, token, pkt, max_sz, in_sz);
- }
+ PANIC ("unknown USB error");
}
+ else
+ err = USB_HOST_ERR_NONE;
- return 0;
+ //delayed_free_qh (qh);
+
+ //printf ("err=%d\n", err);
+ if (err == 0 && data != NULL)
+ hex_dump (0, data, *size, true);
+ return err;
}
static int
-uhci_tx_pkt_bulk (struct uhci_eop_info *ue, int token, void *buf,
- int sz, int *tx)
+uhci_dev_bulk (host_eop_info hei, bool out, void *data, size_t *size)
{
- /* XXX this can be made to use async packets */
- int bytes = 0;
- int txed = 0;
+ struct uhci_eop_info *ue;
+ struct uhci_dev_info *ud;
+ struct queue_head *qh;
+ struct tx_descriptor *td;
+ size_t size_alloced;
+ int err;
- /* send data in max_pkt sized chunks */
- while (bytes < sz)
+ ue = hei;
+ ud = ue->ud;
+
+ /* don't bother if ports are down */
+ if (ud->ui->attached_ports == 0)
+ return USB_HOST_ERR_NODEV;
+
+ if (!out)
+ memset (data, 0xcc, *size);
+
+ qh = allocate_queue_head ();
+ if (qh == NULL)
+ return USB_HOST_ERR_NOMEM;
+
+ /* Data stage: IN/OUT packets. */
+ size_alloced = 0;
+ while (size_alloced < *size)
{
- int to_tx, pkt_txed;
- int left;
- int err;
- bool wait_on_pkt;
-
- left = sz - bytes;
- to_tx = (left > ue->maxpkt) ? ue->maxpkt : left;
- wait_on_pkt = (left <= to_tx) ? true : false;
-
- pkt_txed = 0;
- err = uhci_tx_pkt (ue, token, buf + bytes, 0, to_tx, &pkt_txed,
- wait_on_pkt);
- if (err)
- {
- if (tx != NULL)
- *tx = txed;
- return err;
- }
- txed += pkt_txed;
- bytes += pkt_txed;
+ int packet = *size - size_alloced;
+ if (packet > ue->maxpkt)
+ packet = ue->maxpkt;
+
+ td = allocate_transfer_descriptor (qh);
+ if (td == NULL)
+ return USB_HOST_ERR_NOMEM;
+
+ uhci_setup_td (td, ud->dev_addr,
+ out ? USB_TOKEN_OUT : USB_TOKEN_IN,
+ ue->eop, data + size_alloced, packet,
+ ue->toggle, ud->low_speed);
+ ue->toggle = !ue->toggle;
+ td->control.spd = 1;
+ td->offset = size_alloced;
+
+ size_alloced += packet;
+ }
+
+ /* Execute. */
+ td = execute_qh (ud->ui, qh);
+ if (td != NULL)
+ {
+ ue->toggle = !td->token.data_toggle;
+ if (!out)
+ *size = td->offset + ((td->control.actual_len + 1) & 0x7ff);
+
+ if (td->control.bitstuff)
+ err = USB_HOST_ERR_BITSTUFF;
+ else if (td->control.timeout)
+ err = USB_HOST_ERR_TIMEOUT;
+ else if (td->control.nak)
+ err = USB_HOST_ERR_NAK;
+ else if (td->control.babble)
+ err = USB_HOST_ERR_BABBLE;
+ else if (td->control.buffer_error)
+ err = USB_HOST_ERR_BUFFER;
+ else if (td->control.stalled)
+ err = USB_HOST_ERR_STALL;
+ else if (!out)
+ {
+ /* Just a short packet. */
+ printf ("short packet\n");
+ err = USB_HOST_ERR_NONE;
+ }
+ else
+ PANIC ("unknown USB error");
}
+ else
+ err = USB_HOST_ERR_NONE;
- if (tx != NULL)
- *tx = txed;
+ //delayed_free_qh (qh);
- return USB_HOST_ERR_NONE;
+ if (err)
+ PANIC ("err=%d\n", err);
+ if (err == 0 && data != NULL && !out)
+ hex_dump (0, data, *size, true);
+ return err;
}
static int
static void
uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
- int eop, void *pkt, int sz, int toggle, bool ls)
+ int eop, void *pkt, int sz, int toggle, bool ls UNUSED)
{
td->buf_ptr = (sz == 0) ? 0 : vtop (pkt);
td->control.actual_len = 0;
td->control.active = 1;
- td->flp.qh_select = 0;
- td->flp.depth_select = 0;
+ td->next_td = UHCI_LP_TERMINATE;
/* kill packet if too many errors */
td->control.error_limit = 3;
}
-static int
-uhci_tx_pkt_now (struct uhci_eop_info *ue, int token, void *pkt, int sz)
-{
- struct tx_descriptor *td;
- struct uhci_dev_info *ud;
-
- ud = ue->ud;
-
- uhci_lock (ud->ui);
-
- td = uhci_acquire_td (ud->ui);
- memset (td, 0, sizeof (struct tx_descriptor));
- uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, sz, ue->toggle,
- ud->low_speed);
- td->control.ioc = 1;
-
- uhci_stop (ud->ui);
-
- uhci_add_td_to_qh (ud->qh, td);
- td->flags = TD_FL_ASYNC | TD_FL_USED;
-
- uhci_run (ud->ui);
- uhci_unlock (ud->ui);
-
- ue->toggle ^= 1;
- return USB_HOST_ERR_NONE;
-}
-
-static int
-uhci_tx_pkt_wait (struct uhci_eop_info *ue, int token, void *pkt,
- int max_sz, int *in_sz)
-{
- enum intr_level old_lvl;
- struct tx_descriptor *td;
- struct usb_wait w;
- int err;
- struct uhci_dev_info *ud;
-
- ud = ue->ud;
-
- uhci_lock (ud->ui);
-
- td = uhci_acquire_td (ud->ui);
- memset (td, 0, sizeof (struct tx_descriptor));
-
- uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, max_sz, ue->toggle,
- ud->low_speed);
- td->control.ioc = 1;
-
- w.td = td;
- w.ud = ud;
- sema_init (&w.sem, 0);
-
- uhci_stop (ud->ui);
-
- /* put into device's queue and add to waiting packet list */
- uhci_add_td_to_qh (ud->qh, td);
- td->flags = TD_FL_USED;
-
- list_push_back (&ud->ui->waiting, &w.peers);
-
- /* reactivate controller and wait */
- old_lvl = intr_disable ();
- uhci_run (ud->ui);
- uhci_unlock (ud->ui);
- sema_down (&w.sem);
- intr_set_level (old_lvl);
-
- if (in_sz != NULL)
- {
- if (w.td->control.actual_len == 0x7ff)
- *in_sz = 0;
- else
- *in_sz = w.td->control.actual_len + 1;
- }
-
- if (w.td->control.bitstuff)
- err = USB_HOST_ERR_BITSTUFF;
- else if (w.td->control.timeout)
- err = USB_HOST_ERR_TIMEOUT;
- else if (w.td->control.nak)
- err = USB_HOST_ERR_NAK;
- else if (w.td->control.babble)
- err = USB_HOST_ERR_BABBLE;
- else if (w.td->control.buffer_error)
- err = USB_HOST_ERR_BUFFER;
- else if (w.td->control.stalled)
- err = USB_HOST_ERR_STALL;
- else
- {
- err = USB_HOST_ERR_NONE;
- ue->toggle ^= 1;
- }
-
- uhci_release_td (ud->ui, td);
-
- return err;
-}
-
-static void
-uhci_add_td_to_qh (struct queue_head *qh, struct tx_descriptor *td)
-{
- struct frame_list_ptr *fp;
-
- ASSERT (td != NULL);
-
- td->head = &qh->qelp;
- if (qh->qelp.terminate == 1)
- {
- /* queue is empty */
- td->flp.terminate = 1;
- barrier ();
- td->flp.flp = 0;
- qh->qelp.flp = ptr_to_flp (vtop (td));
- qh->qelp.terminate = 0;
- }
- else
- {
- /* find the last element in the queue */
- fp = ptov (flp_to_ptr (qh->qelp.flp));
- ASSERT (qh->qelp.terminate == 0);
- while (!fp->terminate)
- {
- fp = ptov (flp_to_ptr (fp->flp));
- }
-
- /* set TD to terminated ptr */
- td->flp = *fp;
-
- fp->qh_select = 0;
- fp->depth_select = 0;
- fp->flp = ptr_to_flp (vtop (td));
- barrier ();
- fp->terminate = 0;
- }
-}
-
static void
uhci_irq (void *uhci_data)
{
struct uhci_info *ui;
uint16_t status;
+ //printf ("uhci_irq\n");
ui = uhci_data;
status = pci_reg_read16 (ui->io, UHCI_REG_USBSTS);
if (status & USB_STATUS_PROCESSERR)
{
- dump_all_qh (ui);
+ //dump_all_qh (ui);
dump_regs (ui);
PANIC ("UHCI: Malformed schedule");
}
else if (status & USB_STATUS_HOSTERR)
{
- dump_all_qh (ui);
+ //dump_all_qh (ui);
dump_regs (ui);
PANIC ("UHCI: Host system error");
}
- else if (status & USB_STATUS_INTERR)
+ else if (status & (USB_STATUS_INTERR | USB_STATUS_USBINT))
{
/* errors */
- pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_INTERR);
- }
-
- if (status & USB_STATUS_USBINT)
- {
- /* turn off interrupt */
- uhci_stop_unlocked (ui);
- pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_USBINT);
+ //pci_reg_write16 (ui->io, UHCI_REG_USBINTR, 0);
+ pci_reg_write16 (ui->io, UHCI_REG_USBSTS,
+ status & (USB_STATUS_INTERR | USB_STATUS_USBINT));
+ if (status & USB_STATUS_INTERR)
+ {
+ printf ("USB_STATUS_INTERR\n");
+ print_qh_list (ui);
+ dump_regs (ui);
+ }
+ //if (status & USB_STATUS_USBINT)
+ //printf ("USB_STATUS_USBINT\n");
+ barrier ();
uhci_process_completed (ui);
- uhci_run_unlocked (ui);
}
+ else
+ printf ("nothing?\n");
}
-static int
-uhci_process_completed (struct uhci_info *ui)
+/* Queue processing finished.
+ Remove from lists, wake up waiter. */
+static void
+finish_qh (struct queue_head *qh)
{
- struct list_elem *li;
- int completed = 0;
- size_t start = 0;
-
- li = list_begin (&ui->waiting);
- while (li != list_end (&ui->waiting))
- {
- struct usb_wait *uw;
- struct list_elem *next;
-
- next = list_next (li);
- uw = list_entry (li, struct usb_wait, peers);
-
- if (!uw->td->control.active)
- {
- list_remove (li);
- if (uw->td->control.error_limit == 0 || uw->td->control.stalled)
- {
- uhci_remove_error_td (uw->td);
- }
- uw->td->flags = 0;
- sema_up (&uw->sem);
- completed++;
- }
- li = next;
- }
-
- /* must be a completed async TD.. */
- /* is this too time consuming? I hope not */
- if (completed != 0)
- return completed;
-
- while (start < TD_ENTRIES)
- {
- struct tx_descriptor *td;
+ struct list_elem *p = list_prev (&qh->qh_elem);
+ struct queue_head *prev_qh = list_entry (p, struct queue_head, qh_elem);
- start = bitmap_scan (ui->td_used, start, 1, true);
- if (start == BITMAP_ERROR)
- break;
-
- td = td_from_pool (ui, start);
-
- if (!td->control.active && (td->flags & TD_FL_ASYNC) &&
- (td->flags & TD_FL_USED))
- {
- if (td->control.error_limit == 0 || td->control.stalled)
- {
- uhci_remove_error_td (td);
- }
- uhci_release_td (ui, td);
- completed++;
- }
- start++;
- }
-
- return completed;
+ //printf ("finish_qh\n");
+ prev_qh->next_qh = qh->next_qh;
+ list_remove (&qh->qh_elem);
+ sema_up (&qh->completion);
}
static void
-uhci_remove_error_td (struct tx_descriptor *td)
+uhci_process_completed (struct uhci_info *ui)
{
- struct frame_list_ptr *fp;
- uint32_t td_flp;
+ struct list_elem *e;
- ASSERT (td->head != NULL);
+ if (list_empty (&ui->qh_list))
+ return;
- fp = td->head;
- td_flp = ptr_to_flp (vtop (td));
- while (fp->flp != td_flp)
+ /* Note that we skip the first element in the list, which is an
+ empty queue head pointed to by every frame list pointer. */
+ for (e = list_next (list_begin (&ui->qh_list));
+ e != list_end (&ui->qh_list); )
{
- ASSERT (fp->terminate == 0);
- fp = ptov (flp_to_ptr (fp->flp));
+ struct queue_head *qh = list_entry (e, struct queue_head, qh_elem);
+ uint32_t first_td = qh->first_td;
+ bool delete = false;
+
+ barrier ();
+ //printf ("first_td=%08x\n", first_td);
+ if ((first_td & UHCI_LP_POINTER) == 0)
+ delete = true;
+ else
+ {
+ struct tx_descriptor *td = ptov (first_td & UHCI_LP_POINTER);
+ if (!td->control.active)
+ delete = true;
+ }
+
+ e = list_next (e);
+ if (delete)
+ finish_qh (qh);
}
- *fp = td->flp;
}
static int
return 0;
}
-static host_dev_info
-uhci_create_chan (host_info hi, int dev_addr, int ver)
+static struct queue_head *
+allocate_queue_head (void)
{
- struct uhci_info *ui;
- struct uhci_dev_info *ud;
- int i;
-
- ASSERT (dev_addr <= 127 && dev_addr >= 0);
-
- ui = hi;
-
- ud = malloc (sizeof (struct uhci_dev_info));
- ud->dev_addr = dev_addr;
- ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
-
- ud->errors = 0;
- ud->ui = ui;
- lock_init (&ud->lock);
-
- uhci_lock (ui);
-
- ud->qh = qh_alloc (ud->ui);
-
- /* queue data */
- memset (ud->qh, 0, sizeof (*ud->qh));
- ud->qh->qelp.terminate = 1;
- barrier ();
- ud->qh->qelp.flp = 0;
- ud->qh->qelp.qh_select = 0;
- ud->qh->qhlp.qh_select = 1;
-
- uhci_stop (ui);
-
- /* add to queues in frame list */
- ud->qh->qhlp.flp = ui->frame_list[0].flp;
- ud->qh->qhlp.terminate = ui->frame_list[0].terminate;
- for (i = 0; i < FRAME_LIST_ENTRIES; i++)
+ size_t qh_size = sizeof *allocate_queue_head ();
+ struct queue_head *qh = calloc (1, qh_size > 16 ? qh_size : 16);
+ if (qh != NULL)
{
- ui->frame_list[i].flp = ptr_to_flp (vtop (ud->qh));
- ui->frame_list[i].qh_select = 1;
- ui->frame_list[i].terminate = 0;
+ qh->next_qh = UHCI_LP_TERMINATE;
+ qh->first_td = UHCI_LP_TERMINATE;
+ list_init (&qh->td_list);
+ sema_init (&qh->completion, 0);
}
-
- /* add to device list */
- list_push_back (&ui->devices, &ud->peers);
-
- uhci_run (ui);
- uhci_unlock (ui);
-
- return ud;
+ return qh;
}
-static void
-uhci_destroy_chan (host_dev_info hd)
+static struct tx_descriptor *
+allocate_transfer_descriptor (struct queue_head *qh)
{
- struct uhci_dev_info *ud;
- struct list_elem *li;
-
- ud = hd;
- uhci_lock (ud->ui);
-
- uhci_stop (ud->ui);
-
- uhci_remove_qh (ud->ui, ud->qh);
-
- /* wake up all waiting */
- li = list_begin (&ud->ui->waiting);
- while (li != list_end (&ud->ui->waiting))
+ struct tx_descriptor *td = calloc (1, sizeof *td);
+ if (td == NULL)
{
- struct usb_wait *w;
- w = list_entry (li, struct usb_wait, peers);
- if (w->ud == ud)
- {
- sema_up (&w->sem);
- list_remove (li);
- }
- li = list_next (li);
+ /* FIXME: free the whole queue head. */
+ return NULL;
}
- list_remove (&ud->peers);
-
- uhci_run (ud->ui);
-
- qh_free (ud->ui, ud->qh);
-
- uhci_unlock (ud->ui);
-
- free (ud);
-}
-
-/**
- * Remove a queue from the UHCI schedule
- */
-static void
-uhci_remove_qh (struct uhci_info *ui, struct queue_head *qh)
-{
- uintptr_t qh_flp;
-
- ASSERT (lock_held_by_current_thread (&ui->lock));
- ASSERT (uhci_is_stopped (ui));
- ASSERT (qh != NULL);
-
- qh_flp = ptr_to_flp (vtop (qh));
- /* remove from host queue */
- if (ui->frame_list[0].flp == qh_flp)
- {
- int i;
- /* up top */
- for (i = 0; i < FRAME_LIST_ENTRIES; i++)
- {
- ui->frame_list[i] = qh->qhlp;
- }
- }
+ if (list_empty (&qh->td_list))
+ qh->first_td = make_lp (td);
else
{
- /* in the middle */
- struct frame_list_ptr *fp;
- struct frame_list_ptr *prev;
-
- fp = ptov (flp_to_ptr (ui->frame_list[0].flp));
- ASSERT (!fp->terminate);
- do
- {
- prev = fp;
- fp = ptov (flp_to_ptr (fp->flp));
- }
- while (!fp->terminate && fp->flp != qh_flp);
- *prev = qh->qhlp;
+ struct list_elem *p = list_back (&qh->td_list);
+ struct tx_descriptor *prev_td = list_entry (p, struct tx_descriptor,
+ td_elem);
+ prev_td->next_td = make_lp (td);
}
+ list_push_back (&qh->td_list, &td->td_elem);
+ td->next_td = UHCI_LP_TERMINATE;
+ return td;
}
-/**
- * Put UHCI into stop state
- * Wait until status register reflects setting
- */
-static void
-uhci_stop (struct uhci_info *ui)
-{
- ASSERT (intr_get_level () != INTR_OFF);
- ASSERT (lock_held_by_current_thread (&ui->lock));
-
- uhci_stop_unlocked (ui);
-}
-
-static void
-uhci_stop_unlocked (struct uhci_info *ui)
+static host_dev_info
+uhci_create_chan (host_info hi, int dev_addr, int ver)
{
- uint16_t cmd;
- int i;
-
- cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
- cmd = cmd & ~USB_CMD_RS;
+ struct uhci_info *ui;
+ struct uhci_dev_info *ud;
- pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
+ ASSERT (dev_addr <= 127 && dev_addr >= 0);
- /* wait for execution schedule to finish up */
- for (i = 0; i < 1000; i++)
- {
- if (uhci_is_stopped (ui))
- return;
- }
+ ui = hi;
- PANIC ("UHCI: Controller did not halt\n");
+ ud = malloc (sizeof (struct uhci_dev_info));
+ ud->dev_addr = dev_addr;
+ ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
-}
+ ud->errors = 0;
+ ud->ui = ui;
+ lock_init (&ud->lock);
-static void
-uhci_run_unlocked (struct uhci_info *ui)
-{
- uint16_t cmd;
- cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
- cmd = cmd | USB_CMD_RS | USB_CMD_MAX_PACKET;
- pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
+ return ud;
}
-/**
- * Put UHCI into 'Run' State
- */
static void
-uhci_run (struct uhci_info *ui)
+uhci_destroy_chan (host_dev_info hd UNUSED)
{
- ASSERT (lock_held_by_current_thread (&ui->lock));
- uhci_run_unlocked (ui);
-}
-
-static struct tx_descriptor *
-uhci_acquire_td (struct uhci_info *ui)
-{
- size_t td_idx;
- struct tx_descriptor *td;
-
- ASSERT (lock_held_by_current_thread (&ui->lock));
- ASSERT (!uhci_is_stopped (ui));
-
- sema_down (&ui->td_sem);
- td_idx = bitmap_scan_and_flip (ui->td_used, 0, 1, false);
- ASSERT (td_idx != BITMAP_ERROR);
- td = td_from_pool (ui, td_idx);
-
- return td;
+ /* FIXME */
+ /* FIXME: wake up all waiting queue heads. */
+ /* FIXME: arrange for qhs to be freed. */
}
static void
ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
}
-static void
-dump_all_qh (struct uhci_info *ui)
-{
- struct list_elem *li;
-
- printf ("schedule: %x...", vtop (ui->frame_list));
- printf ("%x", *((uint32_t *) ui->frame_list));
- li = list_begin (&ui->devices);
- while (li != list_end (&ui->devices))
- {
- struct uhci_dev_info *ud;
- ud = list_entry (li, struct uhci_dev_info, peers);
- dump_qh (ud->qh);
- li = list_next (li);
- }
-}
-
-static void
-dump_qh (struct queue_head *qh)
-{
- struct frame_list_ptr *fp;
- printf ("qh: %p %x\n", qh, vtop (qh));
- fp = &qh->qelp;
- while (!fp->terminate)
- {
- printf ("%x %x\n", *((uint32_t *) fp), *(uint32_t *) (fp + 1));
- fp = ptov (flp_to_ptr (fp->flp));
- }
- printf ("%x %x\n\n", *(uint32_t *) fp, *(uint32_t *) (fp + 1));
-}
-
-static struct tx_descriptor *
-td_from_pool (struct uhci_info *ui, int idx)
-{
- ASSERT (idx >= 0 && idx < TD_ENTRIES);
- return (((void *) ui->td_pool) + idx * 32);
-}
-
static void
uhci_detect_ports (struct uhci_info *ui)
{
}
}
-static void
-uhci_stall_watchdog (struct uhci_info *ui)
-{
- while (1)
- {
- int rmved;
- timer_msleep (1000);
- printf ("watchdog\n");
- uhci_lock (ui);
- uhci_stop (ui);
- rmved = uhci_remove_stalled (ui);
- if (rmved > 0)
- printf ("removed stalled packet in watchdog\n");
- uhci_run (ui);
- uhci_unlock (ui);
- }
-}
-
-static int
-uhci_remove_stalled (struct uhci_info *ui)
-{
- struct list_elem *li;
- int rmved;
-
- rmved = 0;
- li = list_begin (&ui->waiting);
-
- intr_disable ();
-
- while (li != list_end (&ui->waiting))
- {
- struct usb_wait *uw;
- struct list_elem *next;
- uint32_t ctrl;
-
- next = list_next (li);
- uw = list_entry (li, struct usb_wait, peers);
-
- if ((!uw->td->control.active && uw->td->control.stalled) ||
- (uw->td->control.nak))
- {
- memcpy (&ctrl, &uw->td->control, 4);
- printf ("CTRL: %x\n", ctrl);
- list_remove (li);
- uhci_remove_error_td (uw->td);
- sema_up (&uw->sem);
- rmved++;
- }
- li = next;
- }
-
- intr_enable ();
-
- return rmved;
-}
-
-static void
-uhci_release_td (struct uhci_info *ui, struct tx_descriptor *td)
-{
- int ofs = (uintptr_t) td - (uintptr_t) ui->td_pool;
- int entry = ofs / 32;
-
- ASSERT (entry < TD_ENTRIES);
-
- td->flags = 0;
- bitmap_reset (ui->td_used, entry);
- sema_up (&ui->td_sem);
-}
-
static host_eop_info
uhci_create_eop (host_dev_info hd, int eop, int maxpkt)
{
{
free (hei);
}
-
-static struct queue_head *
-qh_alloc (struct uhci_info *ui)
-{
- size_t qh_idx;
- struct queue_head *qh;
-
- ASSERT (lock_held_by_current_thread (&ui->lock));
-
- qh_idx = bitmap_scan_and_flip (ui->qh_used, 0, 1, false);
- if (qh_idx == BITMAP_ERROR)
- {
- PANIC ("UHCI: Too many queue heads in use-- runaway USB stack?\n");
- }
- qh = (void *) (((intptr_t) ui->qh_pool) + qh_idx * 16);
-
- return qh;
-}
-
-static void
-qh_free (struct uhci_info *ui, struct queue_head *qh)
-{
- size_t entry;
- ASSERT (lock_held_by_current_thread (&ui->lock));
-
- entry = ((intptr_t) qh - (intptr_t) ui->qh_pool) / 16;
- bitmap_reset (ui->qh_used, entry);
-}
projects / pintos-anon / blobdiff