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-rw-r--r--payloads/libpayload/drivers/usb/xhci_devconf.c77
-rw-r--r--payloads/libpayload/drivers/usb/xhci_private.h5
2 files changed, 70 insertions, 12 deletions
diff --git a/payloads/libpayload/drivers/usb/xhci_devconf.c b/payloads/libpayload/drivers/usb/xhci_devconf.c
index 5b5bb5e800..32cd2918c1 100644
--- a/payloads/libpayload/drivers/usb/xhci_devconf.c
+++ b/payloads/libpayload/drivers/usb/xhci_devconf.c
@@ -75,6 +75,31 @@ xhci_get_tt(xhci_t *const xhci, const usb_speed speed,
return *tt != 0;
}
+static void
+xhci_reap_slots(xhci_t *const xhci, int skip_slot)
+{
+ int i;
+
+ xhci_debug("xHC resource shortage, trying to reap old slots...\n");
+ for (i = 1; i <= xhci->max_slots_en; i++) {
+ if (i == skip_slot)
+ continue; /* don't reap slot we were working on */
+ if (xhci->dev[i].transfer_rings[1])
+ continue; /* slot still in use */
+ if (!xhci->dev[i].ctx.raw)
+ continue; /* slot already disabled */
+
+ const int cc = xhci_cmd_disable_slot(xhci, i);
+ if (cc != CC_SUCCESS)
+ xhci_debug("Failed to disable slot %d: %d\n", i, cc);
+ else
+ xhci_spew("Successfully reaped slot %d\n", i);
+ xhci->dcbaa[i] = 0;
+ free(xhci->dev[i].ctx.raw);
+ xhci->dev[i].ctx.raw = NULL;
+ }
+}
+
static inputctx_t *
xhci_make_inputctx(const size_t ctxsize)
{
@@ -119,6 +144,10 @@ xhci_set_address (hci_t *controller, usb_speed speed, int hubport, int hubaddr)
int slot_id;
int cc = xhci_cmd_enable_slot(xhci, &slot_id);
+ if (cc == CC_NO_SLOTS_AVAILABLE) {
+ xhci_reap_slots(xhci, 0);
+ cc = xhci_cmd_enable_slot(xhci, &slot_id);
+ }
if (cc != CC_SUCCESS) {
xhci_debug("Enable slot failed: %d\n", cc);
goto _free_return;
@@ -163,6 +192,10 @@ xhci_set_address (hci_t *controller, usb_speed speed, int hubport, int hubaddr)
xhci->dcbaa[slot_id] = virt_to_phys(di->ctx.raw);
cc = xhci_cmd_address_device(xhci, slot_id, ic);
+ if (cc == CC_RESOURCE_ERROR) {
+ xhci_reap_slots(xhci, slot_id);
+ cc = xhci_cmd_address_device(xhci, slot_id, ic);
+ }
if (cc != CC_SUCCESS) {
xhci_debug("Address device failed: %d\n", cc);
goto _disable_return;
@@ -199,6 +232,10 @@ xhci_set_address (hci_t *controller, usb_speed speed, int hubport, int hubaddr)
*ic->add = (1 << 1); /* EP0 Context */
EC_SET(MPS, ic->dev.ep0, dev->endpoints[0].maxpacketsize);
cc = xhci_cmd_evaluate_context(xhci, slot_id, ic);
+ if (cc == CC_RESOURCE_ERROR) {
+ xhci_reap_slots(xhci, slot_id);
+ cc = xhci_cmd_evaluate_context(xhci, slot_id, ic);
+ }
if (cc != CC_SUCCESS) {
xhci_debug("Context evaluation failed: %d\n", cc);
goto _disable_return;
@@ -216,8 +253,10 @@ _free_return:
if (tr)
free((void *)tr->ring);
free(tr);
- if (di)
+ if (di) {
free(di->ctx.raw);
+ di->ctx.raw = 0;
+ }
_free_ic_return:
if (ic)
free(ic->raw);
@@ -330,7 +369,8 @@ int
xhci_finish_device_config(usbdev_t *const dev)
{
xhci_t *const xhci = XHCI_INST(dev->controller);
- devinfo_t *const di = &xhci->dev[dev->address];
+ int slot_id = dev->address;
+ devinfo_t *const di = &xhci->dev[slot_id];
int i, ret = 0;
@@ -363,8 +403,11 @@ xhci_finish_device_config(usbdev_t *const dev)
const int config_id = dev->configuration->bConfigurationValue;
xhci_debug("config_id: %d\n", config_id);
- const int cc =
- xhci_cmd_configure_endpoint(xhci, dev->address, config_id, ic);
+ int cc = xhci_cmd_configure_endpoint(xhci, slot_id, config_id, ic);
+ if (cc == CC_RESOURCE_ERROR || cc == CC_BANDWIDTH_ERROR) {
+ xhci_reap_slots(xhci, slot_id);
+ cc = xhci_cmd_configure_endpoint(xhci, slot_id, config_id, ic);
+ }
if (cc != CC_SUCCESS) {
xhci_debug("Configure endpoint failed: %d\n", cc);
ret = CONTROLLER_ERROR;
@@ -396,19 +439,31 @@ xhci_destroy_dev(hci_t *const controller, const int slot_id)
if (slot_id <= 0 || slot_id > xhci->max_slots_en)
return;
- int i;
-
- const int cc = xhci_cmd_disable_slot(xhci, slot_id);
+ inputctx_t *const ic = xhci_make_inputctx(CTXSIZE(xhci));
+ if (!ic) {
+ xhci_debug("Out of memory, leaking resources!\n");
+ return;
+ }
+ const int num_eps = controller->devices[slot_id]->num_endp;
+ *ic->add = 0; /* Leave Slot/EP0 state as it is for now. */
+ *ic->drop = (1 << num_eps) - 1; /* Drop all endpoints we can. */
+ *ic->drop &= ~(1 << 1 | 1 << 0); /* Not allowed to drop EP0 or Slot. */
+ int cc = xhci_cmd_evaluate_context(xhci, slot_id, ic);
+ if (cc != CC_SUCCESS)
+ xhci_debug("Failed to quiesce slot %d: %d\n", slot_id, cc);
+ cc = xhci_cmd_stop_endpoint(xhci, slot_id, 1);
if (cc != CC_SUCCESS)
- xhci_debug("Failed to disable slot %d: %d\n", slot_id, cc);
+ xhci_debug("Failed to stop EP0 on slot %d: %d\n", slot_id, cc);
+ int i;
devinfo_t *const di = &xhci->dev[slot_id];
- for (i = 1; i < 31; ++i) {
+ for (i = 1; i < num_eps; ++i) {
if (di->transfer_rings[i])
free((void *)di->transfer_rings[i]->ring);
free(di->transfer_rings[i]);
-
free(di->interrupt_queues[i]);
}
- xhci->dcbaa[slot_id] = 0;
+
+ xhci_spew("Stopped slot %d, but not disabling it yet.\n", slot_id);
+ di->transfer_rings[1] = NULL;
}
diff --git a/payloads/libpayload/drivers/usb/xhci_private.h b/payloads/libpayload/drivers/usb/xhci_private.h
index f01a37f842..26f7666539 100644
--- a/payloads/libpayload/drivers/usb/xhci_private.h
+++ b/payloads/libpayload/drivers/usb/xhci_private.h
@@ -55,6 +55,9 @@
#define CC_SUCCESS 1
#define CC_TRB_ERROR 5
#define CC_STALL_ERROR 6
+#define CC_RESOURCE_ERROR 7
+#define CC_BANDWIDTH_ERROR 8
+#define CC_NO_SLOTS_AVAILABLE 9
#define CC_SHORT_PACKET 13
#define CC_EVENT_RING_FULL_ERROR 21
#define CC_COMMAND_RING_STOPPED 24
@@ -307,7 +310,7 @@ typedef struct intrq {
typedef struct devinfo {
devctx_t ctx;
transfer_ring_t *transfer_rings[NUM_EPS];
- intrq_t *interrupt_queues[32];
+ intrq_t *interrupt_queues[NUM_EPS];
} devinfo_t;
typedef struct erst_entry {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 18:18:50 +0000