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grub2/0215-Initialize-USB-ports-in-parallel-to-speed-up-boot.patch
Peter Jones f74b50e380 Rebase to upstream, fix a pile of bugs. The usual. 
Signed-off-by: Peter Jones <pjones@redhat.com>
2013-06-12 15:37:08 -04:00

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From b528ebd33741511b054926e6076b23ab0637f6da Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Tue, 19 Mar 2013 23:06:44 +0100
Subject: [PATCH 215/482] Initialize USB ports in parallel to speed-up
boot.
---
ChangeLog | 4 +
grub-core/bus/usb/usb.c | 38 ------
grub-core/bus/usb/usbhub.c | 320 +++++++++++++++++++++++++++++----------------
include/grub/usb.h | 16 +++
4 files changed, 228 insertions(+), 150 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 725fbe2..dd9c97a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
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
due to delayed attach.
diff --git a/grub-core/bus/usb/usb.c b/grub-core/bus/usb/usb.c
index 108c69b..024190e 100644
--- a/grub-core/bus/usb/usb.c
+++ b/grub-core/bus/usb/usb.c
@@ -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
diff --git a/grub-core/bus/usb/usbhub.c b/grub-core/bus/usb/usbhub.c
index 253e49f..d0be80d 100644
--- a/grub-core/bus/usb/usbhub.c
+++ b/grub-core/bus/usb/usbhub.c
@@ -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);
-
- if (speed != GRUB_USB_SPEED_NONE)
- attach_root_port (hub, i, speed);
- }
+ 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;
+
+ 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 ("USB root hub registered");
+ grub_boot_time ("After the stable power wait on USB root");
- return GRUB_USB_ERR_NONE;
+ 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");
}
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
diff --git a/include/grub/usb.h b/include/grub/usb.h
index 7164dd5..12a456b 100644
--- a/include/grub/usb.h
+++ b/include/grub/usb.h
@@ -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;
--
1.8.2.1
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