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Initialize USB ports in parallel to speed-up boot.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-03-19 23:06:44 +01:00
parent d745dda77e
commit f6df57d216
4 changed files with 227 additions and 149 deletions
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4
ChangeLog
View file

@ -1,3 +1,7 @@
2013-03-19 Vladimir Serbinenko <phcoder@gmail.com>
Initialize USB ports in parallel to speed-up boot.
2013-03-19 Vladimir Serbinenko <phcoder@gmail.com>
Fix USB devices not being detected when requested

38
grub-core/bus/usb/usb.c
View file

@ -26,46 +26,8 @@
GRUB_MOD_LICENSE ("GPLv3+");
static grub_usb_controller_dev_t grub_usb_list;
static struct grub_usb_attach_desc *attach_hooks;
/* Iterate over all controllers found by the driver. */
static int
grub_usb_controller_dev_register_iter (grub_usb_controller_t dev, void *data)
{
grub_usb_controller_dev_t usb = data;
dev->dev = usb;
/* Enable the ports of the USB Root Hub. */
grub_usb_root_hub (dev);
return 0;
}
void
grub_usb_controller_dev_register (grub_usb_controller_dev_t usb)
{
usb->next = grub_usb_list;
grub_usb_list = usb;
if (usb->iterate)
usb->iterate (grub_usb_controller_dev_register_iter, usb);
}
void
grub_usb_controller_dev_unregister (grub_usb_controller_dev_t usb)
{
grub_usb_controller_dev_t *p, q;
for (p = &grub_usb_list, q = *p; q; p = &(q->next), q = q->next)
if (q == usb)
{
*p = q->next;
break;
}
}
#if 0
/* Context for grub_usb_controller_iterate. */
struct grub_usb_controller_iterate_ctx

318
grub-core/bus/usb/usbhub.c
View file

@ -41,6 +41,7 @@ struct grub_usb_hub
};
static struct grub_usb_hub *hubs;
static grub_usb_controller_dev_t grub_usb_list;
/* Add a device that currently has device number 0 and resides on
CONTROLLER, the Hub reported that the device speed is SPEED. */
@ -146,10 +147,15 @@ grub_usb_add_hub (grub_usb_device_t dev)
grub_dprintf ("usb", "Hub set configuration\n");
grub_usb_set_configuration (dev, 1);
dev->children = grub_zalloc (hubdesc.portcnt * sizeof (dev->children[0]));
if (!dev->children)
return GRUB_USB_ERR_INTERNAL;
dev->nports = hubdesc.portcnt;
dev->children = grub_zalloc (hubdesc.portcnt * sizeof (dev->children[0]));
dev->ports = grub_zalloc (dev->nports * sizeof (dev->ports[0]));
if (!dev->children || !dev->ports)
{
grub_free (dev->children);
grub_free (dev->ports);
return GRUB_USB_ERR_INTERNAL;
}
/* Power on all Hub ports. */
for (i = 1; i <= hubdesc.portcnt; i++)
@ -197,46 +203,6 @@ attach_root_port (struct grub_usb_hub *hub, int portno,
{
grub_usb_device_t dev;
grub_err_t err;
int total, i;
grub_usb_speed_t current_speed = GRUB_USB_SPEED_NONE;
int changed=0;
grub_boot_time ("detect_dev USB root portno=%d\n", portno);
#if 0
/* Specification does not say about disabling of port when device
* connected. If disabling is really necessary for some devices,
* delete this #if 0 and related #endif */
/* Disable the port. XXX: Why? */
err = hub->controller->dev->portstatus (hub->controller, portno, 0);
if (err)
return;
#endif
grub_boot_time ("Before the stable power wait portno=%d", portno);
/* Wait for completion of insertion and stable power (USB spec.)
* Should be at least 100ms, some devices requires more...
* There is also another thing - some devices have worse contacts
* and connected signal is unstable for some time - we should handle
* it - but prevent deadlock in case when device is too faulty... */
for (total = i = 0; (i < 250) && (total < 2000); i++, total++)
{
grub_millisleep (1);
current_speed = hub->controller->dev->detect_dev
(hub->controller, portno, &changed);
if (current_speed == GRUB_USB_SPEED_NONE)
i = 0;
}
grub_boot_time ("After the stable power wait portno=%d", portno);
grub_dprintf ("usb", "total=%d\n", total);
if (total >= 2000)
{
grub_boot_time ("Root port timeout");
return;
}
grub_boot_time ("After detect_dev");
@ -267,12 +233,14 @@ attach_root_port (struct grub_usb_hub *hub, int portno,
grub_boot_time ("Attached root port");
}
grub_usb_err_t
grub_usb_root_hub (grub_usb_controller_t controller)
/* Iterate over all controllers found by the driver. */
static int
grub_usb_controller_dev_register_iter (grub_usb_controller_t controller, void *data)
{
int i;
grub_usb_controller_dev_t usb = data;
struct grub_usb_hub *hub;
int changed=0;
controller->dev = usb;
grub_boot_time ("Registering USB root hub");
@ -295,29 +263,118 @@ grub_usb_root_hub (grub_usb_controller_t controller)
/* Query the number of ports the root Hub has. */
hub->nports = controller->dev->hubports (controller);
hub->devices = grub_zalloc (sizeof (hub->devices[0]) * hub->nports);
if (!hub->devices)
usb->ports = grub_zalloc (sizeof (usb->ports[0]) * hub->nports);
if (!hub->devices || !usb->ports)
{
grub_free (hub->devices);
grub_free (usb->ports);
grub_free (hub->controller);
grub_free (hub);
return GRUB_USB_ERR_INTERNAL;
grub_print_error ();
return 0;
}
for (i = 0; i < hub->nports; i++)
return 0;
}
void
grub_usb_controller_dev_unregister (grub_usb_controller_dev_t usb)
{
grub_usb_controller_dev_t *p, q;
for (p = &grub_usb_list, q = *p; q; p = &(q->next), q = q->next)
if (q == usb)
{
*p = q->next;
break;
}
}
void
grub_usb_controller_dev_register (grub_usb_controller_dev_t usb)
{
int portno;
int continue_waiting = 0;
struct grub_usb_hub *hub;
usb->next = grub_usb_list;
grub_usb_list = usb;
if (usb->iterate)
usb->iterate (grub_usb_controller_dev_register_iter, usb);
grub_boot_time ("waiting for stable power on USB root\n");
while (1)
{
grub_usb_speed_t speed;
if (!controller->dev->pending_reset)
{
speed = controller->dev->detect_dev (hub->controller, i,
&changed);
for (hub = hubs; hub; hub = hub->next)
if (hub->controller->dev == usb)
{
/* Wait for completion of insertion and stable power (USB spec.)
* Should be at least 100ms, some devices requires more...
* There is also another thing - some devices have worse contacts
* and connected signal is unstable for some time - we should handle
* it - but prevent deadlock in case when device is too faulty... */
for (portno = 0; portno < hub->nports; portno++)
{
grub_usb_speed_t speed;
int changed = 0;
if (speed != GRUB_USB_SPEED_NONE)
attach_root_port (hub, i, speed);
}
speed = hub->controller->dev->detect_dev (hub->controller, portno,
&changed);
if (usb->ports[portno].state == PORT_STATE_NORMAL
&& speed != GRUB_USB_SPEED_NONE)
{
usb->ports[portno].soft_limit_time = grub_get_time_ms () + 250;
usb->ports[portno].hard_limit_time = usb->ports[portno].soft_limit_time + 1750;
usb->ports[portno].state = PORT_STATE_WAITING_FOR_STABLE_POWER;
continue_waiting++;
continue;
}
if (usb->ports[portno].state == PORT_STATE_WAITING_FOR_STABLE_POWER
&& speed == GRUB_USB_SPEED_NONE)
{
usb->ports[portno].soft_limit_time = grub_get_time_ms () + 250;
continue;
}
if (usb->ports[portno].state == PORT_STATE_WAITING_FOR_STABLE_POWER
&& grub_get_time_ms () > usb->ports[portno].soft_limit_time)
{
usb->ports[portno].state = PORT_STATE_STABLE_POWER;
continue_waiting--;
continue;
}
if (usb->ports[portno].state == PORT_STATE_WAITING_FOR_STABLE_POWER
&& grub_get_time_ms () > usb->ports[portno].hard_limit_time)
{
usb->ports[portno].state = PORT_STATE_FAILED_DEVICE;
continue_waiting--;
continue;
}
}
}
if (!continue_waiting)
break;
grub_millisleep (1);
}
grub_boot_time ("After the stable power wait on USB root");
for (hub = hubs; hub; hub = hub->next)
if (hub->controller->dev == usb)
for (portno = 0; portno < hub->nports; portno++)
if (usb->ports[portno].state == PORT_STATE_STABLE_POWER)
{
grub_usb_speed_t speed;
int changed = 0;
usb->ports[portno].state = PORT_STATE_NORMAL;
speed = hub->controller->dev->detect_dev (hub->controller, portno, &changed);
attach_root_port (hub, portno, speed);
}
grub_boot_time ("USB root hub registered");
return GRUB_USB_ERR_NONE;
}
static void detach_device (grub_usb_device_t dev);
@ -349,6 +406,71 @@ detach_device (grub_usb_device_t dev)
grub_usb_devs[dev->addr] = 0;
}
static int
wait_power_nonroot_hub (grub_usb_device_t dev)
{
grub_usb_err_t err;
int continue_waiting = 0;
unsigned i;
for (i = 1; i <= dev->nports; i++)
if (dev->ports[i - 1].state == PORT_STATE_WAITING_FOR_STABLE_POWER)
{
grub_uint64_t tm;
grub_uint32_t current_status = 0;
/* Get the port status. */
err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
GRUB_USB_REQ_GET_STATUS,
0, i,
sizeof (current_status),
(char *) &current_status);
if (err)
{
dev->ports[i - 1].state = PORT_STATE_FAILED_DEVICE;
continue;
}
tm = grub_get_time_ms ();
if (!(current_status & GRUB_USB_HUB_STATUS_PORT_CONNECTED))
dev->ports[i - 1].soft_limit_time = tm + 250;
if (tm >= dev->ports[i - 1].soft_limit_time)
{
if (dev->controller.dev->pending_reset)
continue;
/* Now do reset of port. */
grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
GRUB_USB_REQ_SET_FEATURE,
GRUB_USB_HUB_FEATURE_PORT_RESET,
i, 0, 0);
dev->ports[i - 1].state = PORT_STATE_NORMAL;
grub_boot_time ("Resetting port %d", i);
rescan = 1;
/* We cannot reset more than one device at the same time !
* Resetting more devices together results in very bad
* situation: more than one device has default address 0
* at the same time !!!
* Additionaly, we cannot perform another reset
* anywhere on the same OHCI controller until
* we will finish addressing of reseted device ! */
dev->controller.dev->pending_reset = grub_get_time_ms () + 5000;
npending++;
continue;
}
if (tm >= dev->ports[i - 1].hard_limit_time)
{
dev->ports[i - 1].state = PORT_STATE_FAILED_DEVICE;
continue;
}
continue_waiting = 1;
}
return continue_waiting && dev->controller.dev->pending_reset == 0;
}
static void
poll_nonroot_hub (grub_usb_device_t dev)
{
@ -356,7 +478,6 @@ poll_nonroot_hub (grub_usb_device_t dev)
unsigned i;
grub_uint8_t changed;
grub_size_t actual, len;
int j, total;
if (!dev->hub_transfer)
return;
@ -382,9 +503,9 @@ poll_nonroot_hub (grub_usb_device_t dev)
for (i = 1; i <= dev->nports; i++)
{
grub_uint32_t status;
grub_uint32_t current_status = 0;
if (!(changed & (1 << i)))
if (!(changed & (1 << i))
|| dev->ports[i - 1].state == PORT_STATE_WAITING_FOR_STABLE_POWER)
continue;
/* Get the port status. */
@ -444,52 +565,10 @@ poll_nonroot_hub (grub_usb_device_t dev)
* There is also another thing - some devices have worse contacts
* and connected signal is unstable for some time - we should handle
* it - but prevent deadlock in case when device is too faulty... */
for (total = j = 0; (j < 250) && (total < 2000); j++, total++)
{
grub_millisleep (1);
/* Get the port status. */
err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
GRUB_USB_REQ_GET_STATUS,
0, i,
sizeof (current_status),
(char *) &current_status);
if (err)
{
total = 2000;
break;
}
if (!(current_status & GRUB_USB_HUB_STATUS_PORT_CONNECTED))
j = 0;
}
grub_boot_time ("After the stable power wait portno=%d", i);
grub_dprintf ("usb", "(non-root) total=%d\n", total);
if (total >= 2000)
continue;
/* Now do reset of port. */
grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
GRUB_USB_REQ_SET_FEATURE,
GRUB_USB_HUB_FEATURE_PORT_RESET,
i, 0, 0);
grub_boot_time ("Resetting port %d", i);
rescan = 1;
/* We cannot reset more than one device at the same time !
* Resetting more devices together results in very bad
* situation: more than one device has default address 0
* at the same time !!!
* Additionaly, we cannot perform another reset
* anywhere on the same OHCI controller until
* we will finish addressing of reseted device ! */
dev->controller.dev->pending_reset = grub_get_time_ms () + 5000;
npending++;
return;
dev->ports[i - 1].soft_limit_time = grub_get_time_ms () + 250;
dev->ports[i - 1].hard_limit_time = dev->ports[i - 1].soft_limit_time + 1750;
dev->ports[i - 1].state = PORT_STATE_WAITING_FOR_STABLE_POWER;
continue;
}
}
@ -580,6 +659,8 @@ grub_usb_poll_devices (int wait_for_completion)
}
}
grub_boot_time ("Probing USB device driver");
while (1)
{
rescan = 0;
@ -592,11 +673,26 @@ grub_usb_poll_devices (int wait_for_completion)
if (dev && dev->descdev.class == 0x09)
poll_nonroot_hub (dev);
}
while (1)
{
int continue_waiting = 0;
for (i = 0; i < GRUB_USBHUB_MAX_DEVICES; i++)
{
grub_usb_device_t dev = grub_usb_devs[i];
if (dev && dev->descdev.class == 0x09)
continue_waiting = continue_waiting || wait_power_nonroot_hub (dev);
}
if (!continue_waiting)
break;
grub_millisleep (1);
}
if (!(rescan || (npending && wait_for_completion)))
break;
grub_millisleep (50);
grub_millisleep (25);
}
}
int

16
include/grub/usb.h
View file

@ -121,6 +121,8 @@ struct grub_usb_controller_dev
grub_usb_speed_t (*detect_dev) (grub_usb_controller_t dev, int port, int *changed);
struct grub_usb_hub_port *ports;
/* Per controller flag - port reset pending, don't do another reset */
grub_uint64_t pending_reset;
@ -170,6 +172,18 @@ struct grub_usb_configuration
struct grub_usb_interface interf[32];
};
struct grub_usb_hub_port
{
grub_uint64_t soft_limit_time;
grub_uint64_t hard_limit_time;
enum {
PORT_STATE_NORMAL = 0,
PORT_STATE_WAITING_FOR_STABLE_POWER = 1,
PORT_STATE_FAILED_DEVICE = 2,
PORT_STATE_STABLE_POWER = 3,
} state;
};
struct grub_usb_device
{
/* The device descriptor of this device. */
@ -204,6 +218,8 @@ struct grub_usb_device
/* Number of hub ports. */
unsigned nports;
struct grub_usb_hub_port *ports;
grub_usb_transfer_t hub_transfer;
grub_uint32_t statuschange;