coreboot November 2012

coreboot@coreboot.org

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New patch to review for coreboot: 31e7318 libpayload: Make USB HID support multiple keyboards
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1907 -gerrit commit 31e73184bca37955a6cd40fe7ace331d31f8b351 Author: Nico Huber <nico.huber(a)secunet.com> Date: Fri Nov 23 13:18:13 2012 +0100 libpayload: Make USB HID support multiple keyboards The USB HID driver had some static variables with keyboard state. This moves them to the driver's instance, so multiple attached keyboards don't effect each other. Change-Id: I3f1ccfdea95062b443cebe510abf2f72fdeb1916 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/usbhid.c | 58 ++++++++++++++++++-------------- 1 file changed, 32 insertions(+), 26 deletions(-) diff --git a/payloads/libpayload/drivers/usb/usbhid.c b/payloads/libpayload/drivers/usb/usbhid.c index 496fbaa..9464680 100644 --- a/payloads/libpayload/drivers/usb/usbhid.c +++ b/payloads/libpayload/drivers/usb/usbhid.c @@ -42,9 +42,22 @@ enum { GET_REPORT = 0x1, GET_IDLE = 0x2, GET_PROTOCOL = 0x3, SET_REPORT = 0x9, SET_IDLE = 0xa, SET_PROTOCOL = 0xb }; +typedef union { + struct { + u8 modifiers; + u8 repeats; + u8 keys[6]; + }; + u8 buffer[8]; +} usb_hid_keyboard_event_t; + typedef struct { void* queue; hid_descriptor_t *descriptor; + + usb_hid_keyboard_event_t previous; + int lastkeypress; + int repeat_delay; } usbhid_inst_t; #define HID_INST(dev) ((usbhid_inst_t*)(dev)->data) @@ -241,25 +254,17 @@ static void usb_hid_keyboard_queue(int ch) { keybuffer[keycount++] = ch; } -typedef union { - struct { - u8 modifiers; - u8 repeats; - u8 keys[6]; - }; - u8 buffer[8]; -} usb_hid_keyboard_event_t; - #define KEYBOARD_REPEAT_MS 30 #define INITIAL_REPEAT_DELAY 10 #define REPEAT_DELAY 2 static void -usb_hid_process_keyboard_event(usb_hid_keyboard_event_t *current, - usb_hid_keyboard_event_t *previous) +usb_hid_process_keyboard_event(usbhid_inst_t *const inst, + const usb_hid_keyboard_event_t *const current) { + const usb_hid_keyboard_event_t *const previous = &inst->previous; + int i, keypress = 0, modifiers = 0; - static int lastkeypress = 0, repeat_delay = INITIAL_REPEAT_DELAY; if (current->modifiers & 0x01) /* Left-Ctrl */ modifiers |= MOD_CTRL; if (current->modifiers & 0x02) /* Left-Shift */ modifiers |= MOD_SHIFT; @@ -278,19 +283,20 @@ usb_hid_process_keyboard_event(usb_hid_keyboard_event_t *current, } /* Did the event change at all? */ - if (lastkeypress && !memcmp(current, previous, sizeof(usb_hid_keyboard_event_t))) { + if (inst->lastkeypress && + !memcmp(current, previous, sizeof(*current))) { /* No. Then it's a key repeat event. */ - if (repeat_delay) { - repeat_delay--; + if (inst->repeat_delay) { + inst->repeat_delay--; } else { - usb_hid_keyboard_queue(lastkeypress); - repeat_delay = REPEAT_DELAY; + usb_hid_keyboard_queue(inst->lastkeypress); + inst->repeat_delay = REPEAT_DELAY; } return; } - lastkeypress = 0; + inst->lastkeypress = 0; for (i=0; i<6; i++) { int j; @@ -337,8 +343,8 @@ usb_hid_process_keyboard_event(usb_hid_keyboard_event_t *current, usb_hid_keyboard_queue(keypress); /* Remember for authentic key repeat */ - lastkeypress = keypress; - repeat_delay = INITIAL_REPEAT_DELAY; + inst->lastkeypress = keypress; + inst->repeat_delay = INITIAL_REPEAT_DELAY; } } @@ -346,14 +352,12 @@ static void usb_hid_poll (usbdev_t *dev) { usb_hid_keyboard_event_t current; - static usb_hid_keyboard_event_t previous = { - .buffer = { 0, 0, 0, 0, 0, 0, 0, 0} - }; - u8* buf; + const u8 *buf; + while ((buf=dev->controller->poll_intr_queue (HID_INST(dev)->queue))) { memcpy(&current.buffer, buf, 8); - usb_hid_process_keyboard_event(&current, &previous); - previous = current; + usb_hid_process_keyboard_event(HID_INST(dev), &current); + HID_INST(dev)->previous = current; } } @@ -437,6 +441,8 @@ usb_hid_init (usbdev_t *dev) dev->data = malloc (sizeof (usbhid_inst_t)); if (!dev->data) fatal("Not enough memory for USB HID device.\n"); + memset(&HID_INST(dev)->previous, 0x00, + sizeof(HID_INST(dev)->previous)); usb_debug (" configuring...\n"); usb_hid_set_protocol(dev, interface, hid_proto_boot); usb_hid_set_idle(dev, interface, KEYBOARD_REPEAT_MS);

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New patch to review for coreboot: 27a999d libpayload: Fix memalign() for fragmented alignment regions
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1906 -gerrit commit 27a999df2944c153900fb9567e76d17cf299ca13 Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 17:37:32 2012 +0100 libpayload: Fix memalign() for fragmented alignment regions Found a bug in the memory allocator ;-) If the total free space in an alignment region is large enough for an allocation but fragmented, such that there is no contiguous, sufficient large, free space in the region, memalign() was looking at the same region again and again in an endless loop. The advancing to the next region was just missing. Change-Id: I3fad833804675ee495577ca2749b007f46b5ff69 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/libc/malloc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/payloads/libpayload/libc/malloc.c b/payloads/libpayload/libc/malloc.c index 3c5a3fd..82bae3c 100644 --- a/payloads/libpayload/libc/malloc.c +++ b/payloads/libpayload/libc/malloc.c @@ -387,6 +387,9 @@ look_further: count = 0; } } + /* The free space in this region is fragmented, + so we will move on and try the next one: */ + reg = reg->next; goto look_further; // end condition is once a new region is allocated - it always has enough space }

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New patch to review for coreboot: 963e220 libpayload: Fix interrupt-queue cleanup for OHCI
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1905 -gerrit commit 963e22013423215647fe8f99de7316f65fdfdcc7 Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 17:21:57 2012 +0100 libpayload: Fix interrupt-queue cleanup for OHCI We have to free TDs more carefully if they have been processed by the controller yet. The current code tries to force the controller to post them back to the done queue, but that seems wrong. We can't be sure, when they get written back. This resulted in leaking TDs with an invalid reference to a freed interrupt queue. The new approach: Mark the interrupt queue to be destroyed and handle the freeing later, when the controller posted the last TD to the done queue. Change-Id: I79d80a9dc89e1ca79dc125c4bbccbf23664227b3 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/ohci.c | 37 +++++++++++++++++++++++++--------- 1 file changed, 27 insertions(+), 10 deletions(-) diff --git a/payloads/libpayload/drivers/usb/ohci.c b/payloads/libpayload/drivers/usb/ohci.c index ad5638c..7db3141 100644 --- a/payloads/libpayload/drivers/usb/ohci.c +++ b/payloads/libpayload/drivers/usb/ohci.c @@ -520,6 +520,7 @@ struct _intr_queue { int reqsize; endpoint_t *endp; unsigned int remaining_tds; + int destroy; }; typedef struct _intrq_td intrq_td_t; @@ -648,7 +649,7 @@ ohci_destroy_intr_queue(endpoint_t *const ep, void *const q_) /* Free data buffer. */ free(intrq->data); - /* Process done queue and free processed TDs. */ + /* Free TDs already fetched from the done queue. */ ohci_process_done_queue(ohci, 1); while (intrq->head) { intrq_td_t *const cur_td = intrq->head; @@ -656,12 +657,11 @@ ohci_destroy_intr_queue(endpoint_t *const ep, void *const q_) free(cur_td); --intrq->remaining_tds; } - if (intrq->remaining_tds) { - printf("error: ohci_destroy_intr_queue(): " - "freed all but %d TDs.\n", intrq->remaining_tds); - } - free(intrq); + /* Mark interrupt queue to be destroyed. + ohci_process_done_queue() will free the remaining TDs + and finish the interrupt queue off once all TDs are gone. */ + intrq->destroy = 1; /* Save data toggle. */ ep->toggle = intrq->ed.head_pointer & ED_TOGGLE; @@ -734,11 +734,28 @@ ohci_process_done_queue(ohci_t *const ohci, const int spew_debug) /* Free processed async TDs. */ free((void *)done_td); break; - case TD_QUEUETYPE_INTR: - /* Save done TD if it comes from an interrupt queue. */ - INTRQ_TD_FROM_TD(done_td)->next = temp_tdq; - temp_tdq = INTRQ_TD_FROM_TD(done_td); + case TD_QUEUETYPE_INTR: { + intrq_td_t *const td = INTRQ_TD_FROM_TD(done_td); + intr_queue_t *const intrq = td->intrq; + /* Check if the corresponding interrupt + queue is still beeing processed. */ + if (intrq->destroy) { + /* Free this TD, and */ + free(td); + --intrq->remaining_tds; + /* the interrupt queue if it has no more TDs. */ + if (!intrq->remaining_tds) + free(intrq); + usb_debug("Freed TD from orphaned interrupt " + "queue, %d TDs remain.\n", + intrq->remaining_tds); + } else { + /* Save done TD to be processed. */ + td->next = temp_tdq; + temp_tdq = td; + } break; + } default: break; }

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New patch to review for coreboot: 64dd9f1 libpayload: Rework connection state detection for OHCI
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1904 -gerrit commit 64dd9f1432b845402c4e443aea568dd974fdab3a Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 15:45:48 2012 +0100 libpayload: Rework connection state detection for OHCI The connection state detection in the OHCI root hub driver was broken if you used more than one device per root hub. Change-Id: Ica5c735426beac45ef6f591ce68a72d8283a00f5 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/ohci_rh.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/payloads/libpayload/drivers/usb/ohci_rh.c b/payloads/libpayload/drivers/usb/ohci_rh.c index 9de2b98..aa44f33 100644 --- a/payloads/libpayload/drivers/usb/ohci_rh.c +++ b/payloads/libpayload/drivers/usb/ohci_rh.c @@ -128,15 +128,14 @@ ohci_rh_scanport (usbdev_t *dev, int port) static int ohci_rh_report_port_changes (usbdev_t *dev) { - int i; + ohci_t *const ohcic = OHCI_INST (dev->controller); - if (!(OHCI_INST (dev->controller)->opreg->HcInterruptStatus & RootHubStatusChange)) return -1; - OHCI_INST (dev->controller)->opreg->HcInterruptStatus = RootHubStatusChange; - usb_debug("port change\n"); + int i; for (i = 0; i < RH_INST(dev)->numports; i++) { // maybe detach+attach happened between two scans? - if (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[i] & ConnectStatusChange) { + if (ohcic->opreg->HcRhPortStatus[i] & ConnectStatusChange) { + ohcic->opreg->HcRhPortStatus[i] = ConnectStatusChange; usb_debug("attachment change on port %d\n", i); return i; } @@ -158,7 +157,17 @@ ohci_rh_destroy (usbdev_t *dev) static void ohci_rh_poll (usbdev_t *dev) { + ohci_t *const ohcic = OHCI_INST (dev->controller); + int port; + + /* Check if anything changed. */ + if (!(ohcic->opreg->HcInterruptStatus & RootHubStatusChange)) + return; + ohcic->opreg->HcInterruptStatus = RootHubStatusChange; + usb_debug("root hub status change\n"); + + /* Scan ports with changed connection status. */ while ((port = ohci_rh_report_port_changes (dev)) != -1) ohci_rh_scanport (dev, port); }

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New patch to review for coreboot: 7f59b31 libpayload: ehci: Prevent some race conditions
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1902 -gerrit commit 7f59b31c4efaadebd2897b302c381b80f7925cab Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 11:14:03 2012 +0100 libpayload: ehci: Prevent some race conditions Prevent race conditions, when an interrupt-queue underrun occurred and the controller is currently working on our queue head or a transfer is still in progress. Change-Id: Ia14f80a08071306ee5d1349780be081bfacb206a Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/ehci.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c index 4ff137e..6a1cfb5 100644 --- a/payloads/libpayload/drivers/usb/ehci.c +++ b/payloads/libpayload/drivers/usb/ehci.c @@ -626,8 +626,14 @@ static u8 *ehci_poll_intr_queue(void *const queue) intrq->head = intrq->head->next; } /* reset queue if we fully processed it after underrun */ - else if (intrq->qh.td.next_qtd & QTD_TERMINATE) { + else if ((intrq->qh.td.next_qtd & QTD_TERMINATE) && + /* to prevent race conditions: + not our head and not active */ + (intrq->qh.current_td_ptr != + virt_to_phys(&intrq->head->td)) && + !(intrq->qh.td.token & QTD_ACTIVE)) { usb_debug("resetting underrun ehci interrupt queue.\n"); + intrq->qh.current_td_ptr = 0; memset((void *)&intrq->qh.td, 0, sizeof(intrq->qh.td)); intrq->qh.td.next_qtd = virt_to_phys(&intrq->head->td); }

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New patch to review for coreboot: a194d14 libpayload: Detach devices behind removed USB hubs
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1903 -gerrit commit a194d14df2677e48ac3726106a6545ebded463a5 Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 11:18:19 2012 +0100 libpayload: Detach devices behind removed USB hubs When a USB hub got removed, we should also remove all devices that were attached to it. Change-Id: I73c0da1b7570f1af9726925ca222781b3d752557 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/usbhub.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/payloads/libpayload/drivers/usb/usbhub.c b/payloads/libpayload/drivers/usb/usbhub.c index 47215fc..90e08db 100644 --- a/payloads/libpayload/drivers/usb/usbhub.c +++ b/payloads/libpayload/drivers/usb/usbhub.c @@ -53,6 +53,17 @@ typedef struct { static void usb_hub_destroy (usbdev_t *dev) { + int i; + + /* First, detach all devices behind this hub. */ + int *const ports = HUB_INST (dev)->ports; + for (i = 1; i <= HUB_INST (dev)->num_ports; i++) { + if (ports[i] != -1) { + usb_detach_device(dev->controller, ports[i]); + ports[i] = -1; + } + } + free (HUB_INST (dev)->ports); free (HUB_INST (dev)->descriptor); free (HUB_INST (dev));

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New patch to review for coreboot: 6200319 libpayload: Handle errors in UHCI interrupt queues
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1901 -gerrit commit 6200319695c67521bb2cf0725b58eba2b44e463f Author: Nico Huber <nico.huber(a)secunet.com> Date: Thu Nov 22 11:12:13 2012 +0100 libpayload: Handle errors in UHCI interrupt queues If somethings goes wrong during an interrupt transfer, drop the transfer. Change-Id: I450c08a7a0bf23fbee74237e0355d4a726ace114 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/uhci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/payloads/libpayload/drivers/usb/uhci.c b/payloads/libpayload/drivers/usb/uhci.c index 386392b..bf611d2 100644 --- a/payloads/libpayload/drivers/usb/uhci.c +++ b/payloads/libpayload/drivers/usb/uhci.c @@ -572,7 +572,6 @@ uhci_poll_intr_queue (void *q_) { intr_q *q = (intr_q*)q_; if ((q->tds[q->lastread].ctrlsts & TD_STATUS_ACTIVE) == 0) { - /* FIXME: handle errors */ int current = q->lastread; int previous; if (q->lastread == 0) { @@ -588,7 +587,8 @@ uhci_poll_intr_queue (void *q_) } q->tds[previous].ctrlsts |= TD_STATUS_ACTIVE; q->lastread = (q->lastread + 1) % q->total; - return &q->data[current*q->reqsize]; + if (!(q->tds[current].ctrlsts & TD_STATUS_MASK)) + return &q->data[current*q->reqsize]; } /* reset queue if we fully processed it after underrun */ else if (q->qh->elementlinkptr & FLISTP_TERMINATE) {

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New patch to review for coreboot: 3fb1e36 libpayload: More compliant error recovery in USB MSC
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1900 -gerrit commit 3fb1e361abf89f27f3f86203e6830e9d14ae9bdb Author: Nico Huber <nico.huber(a)secunet.com> Date: Wed Nov 21 16:25:55 2012 +0100 libpayload: More compliant error recovery in USB MSC If an endpoint gets stalled by an MSC device, after successful transmission of a command (CBW), we should still ask for the status (CSW). Otherwise, the driver and the device get desynchronized on the command tags. Change-Id: I53167f22c43b3a237cb4539b3affe37799378b93 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/usbmsc.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/payloads/libpayload/drivers/usb/usbmsc.c b/payloads/libpayload/drivers/usb/usbmsc.c index 5cfb3c6..7e8b360 100644 --- a/payloads/libpayload/drivers/usb/usbmsc.c +++ b/payloads/libpayload/drivers/usb/usbmsc.c @@ -227,16 +227,12 @@ execute_command (usbdev_t *dev, cbw_direction dir, const u8 *cb, int cblen, if (buflen > 0) { if (dir == cbw_direction_data_in) { if (dev->controller-> - bulk (MSC_INST (dev)->bulk_in, buflen, buf, 0)) { + bulk (MSC_INST (dev)->bulk_in, buflen, buf, 0)) clear_stall (MSC_INST (dev)->bulk_in); - return MSC_COMMAND_FAIL; - } } else { if (dev->controller-> - bulk (MSC_INST (dev)->bulk_out, buflen, buf, 0)) { + bulk (MSC_INST (dev)->bulk_out, buflen, buf, 0)) clear_stall (MSC_INST (dev)->bulk_out); - return MSC_COMMAND_FAIL; - } } } int ret = get_csw (MSC_INST (dev)->bulk_in, &csw);

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New patch to review for coreboot: 983586c libpayload: Reduce error output from EHCI
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1899 -gerrit commit 983586c8c5496b76a250e7af2ee64026afff6e60 Author: Nico Huber <nico.huber(a)secunet.com> Date: Wed Nov 21 16:22:26 2012 +0100 libpayload: Reduce error output from EHCI Stalled transfers are not fatal, so don't spew on the console on every tiny failure. Change-Id: I175c1e83a6af09c1abbd43d045ed6dbf0c79f871 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/ehci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c index 5f70b64..4ff137e 100644 --- a/payloads/libpayload/drivers/usb/ehci.c +++ b/payloads/libpayload/drivers/usb/ehci.c @@ -211,7 +211,7 @@ static int wait_for_tds(qtd_t *head) return 1; } if (cur->token & QTD_HALTED) { - printf("ERROR with packet\n"); + usb_debug("ERROR with packet\n"); dump_td(virt_to_phys(cur)); usb_debug("-----------------\n"); return 1;

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New patch to review for coreboot: 3c35827 libpayload: Handle underruns in UHCI interrupt queues
by Nico Huber 23 Nov '12

23 Nov '12

Nico Huber (nico.huber(a)secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1898 -gerrit commit 3c35827c65b42886da678eb7db219b0f153b51f9 Author: Nico Huber <nico.huber(a)secunet.com> Date: Tue Nov 20 17:49:00 2012 +0100 libpayload: Handle underruns in UHCI interrupt queues If usb_poll() isn't called fast enough, the UHCI controller marks an underrun interrupt queue as done (terminating the queue at the head). We can recover from this situation, when usb_poll() gets called again, and the queue is processed. Change-Id: Id56c9df44d6dbd53cd30ad89dfb5bf5977799829 Signed-off-by: Nico Huber <nico.huber(a)secunet.com> --- payloads/libpayload/drivers/usb/uhci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/payloads/libpayload/drivers/usb/uhci.c b/payloads/libpayload/drivers/usb/uhci.c index bfa53f6..386392b 100644 --- a/payloads/libpayload/drivers/usb/uhci.c +++ b/payloads/libpayload/drivers/usb/uhci.c @@ -590,6 +590,11 @@ uhci_poll_intr_queue (void *q_) q->lastread = (q->lastread + 1) % q->total; return &q->data[current*q->reqsize]; } + /* reset queue if we fully processed it after underrun */ + else if (q->qh->elementlinkptr & FLISTP_TERMINATE) { + usb_debug("resetting underrun uhci interrupt queue.\n"); + q->qh->elementlinkptr = virt_to_phys(q->tds + q->lastread); + } return NULL; }

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coreboot November 2012