xHCI needs to get a "Slot ID" from the host controller and allocate other
data structures for every USB device. Make usb_alloc_dev() and
usb_release_dev() allocate and free these device structures. After
setting up the xHC device structures, usb_alloc_dev() must wait for the
hardware to respond to an Enable Slot command. usb_alloc_dev() fires off
a Disable Slot command and does not wait for it to complete.
When the USB core wants to choose an address for the device, the xHCI
driver must issue a Set Address command and wait for an event for that
command.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-dbg.c | 79 ++++++++++++++++
drivers/usb/host/xhci-hcd.c | 201 +++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/xhci-mem.c | 204 ++++++++++++++++++++++++++++++++++++++++-
drivers/usb/host/xhci-pci.c | 7 ++
drivers/usb/host/xhci-ring.c | 34 ++++++-
drivers/usb/host/xhci.h | 94 +++++++++++++++----
6 files changed, 590 insertions(+), 29 deletions(-)
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 570cd48..16ef42a 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -410,3 +410,82 @@ void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci)
val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[1]);
xhci_dbg(xhci, "// xHC command ring deq ptr high bits = 0x%x\n", val);
}
+
+void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep)
+{
+ int i, j;
+ int last_ep_ctx = 31;
+ /* Fields are 32 bits wide, DMA addresses are in bytes */
+ int field_size = 32 / 8;
+
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - drop flags\n",
+ (unsigned int) &ctx->drop_flags,
+ dma, ctx->drop_flags);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - add flags\n",
+ (unsigned int) &ctx->add_flags,
+ dma, ctx->add_flags);
+ dma += field_size;
+ for (i = 0; i > 6; ++i) {
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - rsvd[%d]\n",
+ (unsigned int) &ctx->rsvd[i],
+ dma, ctx->rsvd[i], i);
+ dma += field_size;
+ }
+
+ xhci_dbg(xhci, "Slot Context:\n");
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - dev_info\n",
+ (unsigned int) &ctx->slot.dev_info,
+ dma, ctx->slot.dev_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - dev_info2\n",
+ (unsigned int) &ctx->slot.dev_info2,
+ dma, ctx->slot.dev_info2);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - tt_info\n",
+ (unsigned int) &ctx->slot.tt_info,
+ dma, ctx->slot.tt_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - dev_state\n",
+ (unsigned int) &ctx->slot.dev_state,
+ dma, ctx->slot.dev_state);
+ dma += field_size;
+ for (i = 0; i > 4; ++i) {
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - rsvd[%d]\n",
+ (unsigned int) &ctx->slot.reserved[i],
+ dma, ctx->slot.reserved[i], i);
+ dma += field_size;
+ }
+
+ if (last_ep < 31)
+ last_ep_ctx = last_ep + 1;
+ for (i = 0; i < last_ep_ctx; ++i) {
+ xhci_dbg(xhci, "Endpoint %02d Context:\n", i);
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - ep_info\n",
+ (unsigned int) &ctx->ep[i].ep_info,
+ dma, ctx->ep[i].ep_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - ep_info2\n",
+ (unsigned int) &ctx->ep[i].ep_info2,
+ dma, ctx->ep[i].ep_info2);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - deq[0]\n",
+ (unsigned int) &ctx->ep[i].deq[0],
+ dma, ctx->ep[i].deq[0]);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - deq[1]\n",
+ (unsigned int) &ctx->ep[i].deq[1],
+ dma, ctx->ep[i].deq[1]);
+ dma += field_size;
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - tx_info\n",
+ (unsigned int) &ctx->ep[i].tx_info,
+ dma, ctx->ep[i].tx_info);
+ dma += field_size;
+ for (j = 0; j < 3; ++j) {
+ xhci_dbg(xhci, "@%08x (virt) @%08x (dma) %#08x - rsvd[%d]\n",
+ (unsigned int) &ctx->ep[i].reserved[j],
+ dma, ctx->ep[i].reserved[j], j);
+ dma += field_size;
+ }
+ }
+}
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index d7c2fed..a01d2ee 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -318,6 +318,16 @@ void event_ring_work(unsigned long arg)
xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg);
xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
xhci_dbg_cmd_ptrs(xhci);
+ for (i = 0; i < MAX_HC_SLOTS; ++i) {
+ if (xhci->devs[i]) {
+ for (j = 0; j < 31; ++j) {
+ if (xhci->devs[i]->ep_rings[j]) {
+ xhci_dbg(xhci, "Dev %d endpoint ring %d:\n", i, j);
+ xhci_debug_segment(xhci, xhci->devs[i]->ep_rings[j]->deq_seg);
+ }
+ }
+ }
+ }
if (xhci->noops_submitted != NUM_TEST_NOOPS)
if (setup_one_noop(xhci))
@@ -499,6 +509,197 @@ void xhci_shutdown(struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
+/*
+ * At this point, the struct usb_device is about to go away, the device has
+ * disconnected, and all traffic has been stopped and the endpoints have been
+ * disabled. Free any HC data structures associated with that device.
+ */
+void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ unsigned long flags;
+
+ if (udev->slot_id == 0)
+ return;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ if (queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+ return;
+ }
+ ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ /*
+ * Event command completion handler will free any data structures
+ * associated with the slot
+ */
+}
+
+/*
+ * Returns 0 if the xHC ran out of device slots, the Enable Slot command
+ * timed out, or allocating memory failed. Returns 1 on success.
+ */
+int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ unsigned long flags;
+ int timeleft;
+ int ret;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ ret = queue_slot_control(xhci, TRB_ENABLE_SLOT, 0);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+ return 0;
+ }
+ ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ /* XXX: how much time for xHC slot assignment? */
+ timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
+ USB_CTRL_SET_TIMEOUT);
+ if (timeleft <= 0) {
+ xhci_warn(xhci, "%s while waiting for a slot\n",
+ timeleft == 0 ? "Timeout" : "Signal");
+ /* FIXME cancel the enable slot request */
+ return 0;
+ }
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ if (!xhci->slot_id) {
+ xhci_err(xhci, "Error while assigning device slot ID\n");
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+ }
+ if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_KERNEL)) {
+ /* Disable slot, if we can do it without mem alloc */
+ xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
+ if (!queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
+ ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+ }
+ udev->slot_id = xhci->slot_id;
+ /* Is this a LS or FS device under a HS hub? */
+ /* Hub or peripherial? */
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 1;
+}
+
+/*
+ * Issue an Address Device command (which will issue a SetAddress request to
+ * the device).
+ * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so
+ * we should only issue and wait on one address command at the same time.
+ *
+ * We add one to the device address issued by the hardware because the USB core
+ * uses address 1 for the root hubs (even though they're not really devices).
+ */
+int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ unsigned long flags;
+ int timeleft;
+ struct xhci_virt_device *virt_dev;
+ int ret = 0;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ u32 temp;
+
+ if (!udev->slot_id) {
+ xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ virt_dev = xhci->devs[udev->slot_id];
+
+ /* If this is a Set Address to an unconfigured device, setup ep 0 */
+ if (!udev->config)
+ xhci_setup_addressable_virt_dev(xhci, udev);
+ /* Otherwise, assume the core has the device configured how it wants */
+
+ ret = queue_address_device(xhci, virt_dev->in_ctx_dma, udev->slot_id);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+ return ret;
+ }
+ ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
+ timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
+ USB_CTRL_SET_TIMEOUT);
+ /* FIXME: From section 4.3.4: "Software shall be responsible for timing
+ * the SetAddress() "recovery interval" required by USB and aborting the
+ * command on a timeout.
+ */
+ if (timeleft <= 0) {
+ xhci_warn(xhci, "%s while waiting for a slot\n",
+ timeleft == 0 ? "Timeout" : "Signal");
+ /* FIXME cancel the address device command */
+ return -ETIME;
+ }
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ switch (virt_dev->cmd_status) {
+ case COMP_CTX_STATE:
+ case COMP_EBADSLT:
+ xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n",
+ udev->slot_id);
+ ret = -EINVAL;
+ break;
+ case COMP_TX_ERR:
+ dev_warn(&udev->dev, "Device not responding to set address.\n");
+ ret = -EPROTO;
+ break;
+ case COMP_SUCCESS:
+ xhci_dbg(xhci, "Successful Address Device command\n");
+ break;
+ default:
+ xhci_err(xhci, "ERROR: unexpected command completion "
+ "code 0x%x.\n", virt_dev->cmd_status);
+ ret = -EINVAL;
+ break;
+ }
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return ret;
+ }
+ temp = xhci_readl(xhci, &xhci->op_regs->dcbaa_ptr[0]);
+ xhci_dbg(xhci, "Op regs DCBAA ptr[0] = %#08x\n", temp);
+ temp = xhci_readl(xhci, &xhci->op_regs->dcbaa_ptr[1]);
+ xhci_dbg(xhci, "Op regs DCBAA ptr[1] = %#08x\n", temp);
+ xhci_dbg(xhci, "Slot ID %d dcbaa entry[0] @%08x = %#08x\n",
+ udev->slot_id,
+ (unsigned int) &xhci->dcbaa->dev_context_ptrs[2*udev->slot_id],
+ xhci->dcbaa->dev_context_ptrs[2*udev->slot_id]);
+ xhci_dbg(xhci, "Slot ID %d dcbaa entry[1] @%08x = %#08x\n",
+ udev->slot_id,
+ (unsigned int) &xhci->dcbaa->dev_context_ptrs[2*udev->slot_id+1],
+ xhci->dcbaa->dev_context_ptrs[2*udev->slot_id+1]);
+ xhci_dbg(xhci, "Output Context DMA address = %#08x\n",
+ virt_dev->out_ctx_dma);
+ xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
+ xhci_dbg_ctx(xhci, virt_dev->in_ctx, virt_dev->in_ctx_dma, 2);
+ xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id);
+ xhci_dbg_ctx(xhci, virt_dev->out_ctx, virt_dev->out_ctx_dma, 2);
+ /*
+ * USB core uses address 1 for the roothubs, so we add one to the
+ * address given back to us by the HC.
+ */
+ udev->devnum = (virt_dev->out_ctx->slot.dev_state & DEV_ADDR_MASK) + 1;
+ /* FIXME: Zero the input context control for later use? */
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ xhci_dbg(xhci, "Device address = %d\n", udev->devnum);
+ /* XXX Meh, not sure if anyone else but choose_address uses this. */
+ set_bit(udev->devnum, udev->bus->devmap.devicemap);
+
+ return 0;
+}
+
int xhci_get_frame(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 005d446..d34b91a 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -188,12 +188,187 @@ fail:
return 0;
}
+void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
+{
+ struct xhci_virt_device *dev;
+ int i;
+
+ /* Slot ID 0 is reserved */
+ if (slot_id == 0 || !xhci->devs[slot_id])
+ return;
+
+ dev = xhci->devs[slot_id];
+ xhci->dcbaa->dev_context_ptrs[2*slot_id] = 0;
+ xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0;
+ if (!dev)
+ return;
+
+ for (i = 0; i < 31; ++i)
+ if (dev->ep_rings[i])
+ xhci_ring_free(xhci, dev->ep_rings[i]);
+
+ if (dev->in_ctx)
+ dma_pool_free(xhci->device_pool,
+ dev->in_ctx, dev->in_ctx_dma);
+ if (dev->out_ctx)
+ dma_pool_free(xhci->device_pool,
+ dev->out_ctx, dev->out_ctx_dma);
+ kfree(xhci->devs[slot_id]);
+ xhci->devs[slot_id] = 0;
+}
+
+int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
+ struct usb_device *udev, gfp_t flags)
+{
+ dma_addr_t dma;
+ struct xhci_virt_device *dev;
+
+ /* Slot ID 0 is reserved */
+ if (slot_id == 0 || xhci->devs[slot_id]) {
+ xhci_warn(xhci, "Bad Slot ID %d\n", slot_id);
+ return 0;
+ }
+
+ xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags);
+ if (!xhci->devs[slot_id])
+ return 0;
+ dev = xhci->devs[slot_id];
+
+ /* Allocate the (output) device context that will be used in the HC */
+ dev->out_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma);
+ if (!dev->out_ctx)
+ goto fail;
+ dev->out_ctx_dma = dma;
+ xhci_dbg(xhci, "Slot %d output ctx = 0x%x (dma)\n", slot_id, dma);
+ memset(dev->out_ctx, 0, sizeof(*dev->out_ctx));
+
+ /* Allocate the (input) device context for address device command */
+ dev->in_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma);
+ if (!dev->in_ctx)
+ goto fail;
+ dev->in_ctx_dma = dma;
+ xhci_dbg(xhci, "Slot %d input ctx = 0x%x (dma)\n", slot_id, dma);
+ memset(dev->in_ctx, 0, sizeof(*dev->in_ctx));
+
+ /* Allocate endpoint 0 ring */
+ dev->ep_rings[0] = xhci_ring_alloc(xhci, 1, true, flags);
+ if (!dev->ep_rings[0])
+ goto fail;
+
+ /*
+ * Point to output device context in dcbaa; skip the output control
+ * context, which is eight 32 bit fields (or 32 bytes long)
+ */
+ xhci->dcbaa->dev_context_ptrs[2*slot_id] =
+ (u32) dev->out_ctx_dma + (32);
+ xhci_dbg(xhci, "Set slot id %d dcbaa entry 0x%x to 0x%x\n",
+ slot_id,
+ (unsigned int) &xhci->dcbaa->dev_context_ptrs[2*slot_id],
+ dev->out_ctx_dma);
+ xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0;
+
+ return 1;
+fail:
+ xhci_free_virt_device(xhci, slot_id);
+ return 0;
+}
+
+/* Setup an xHCI virtual device for a Set Address command */
+int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev)
+{
+ struct xhci_virt_device *dev;
+ struct xhci_ep_ctx *ep0_ctx;
+ struct usb_device *top_dev;
+
+ dev = xhci->devs[udev->slot_id];
+ /* Slot ID 0 is reserved */
+ if (udev->slot_id == 0 || !dev) {
+ xhci_warn(xhci, "Slot ID %d is not assigned to this device\n",
+ udev->slot_id);
+ return -EINVAL;
+ }
+ ep0_ctx = &dev->in_ctx->ep[0];
+
+ /* 2) New slot context and endpoint 0 context are valid*/
+ dev->in_ctx->add_flags = SLOT_FLAG | EP0_FLAG;
+
+ /* 3) Only the control endpoint is valid - one endpoint context */
+ dev->in_ctx->slot.dev_info |= LAST_CTX(1);
+
+ switch (udev->speed) {
+ case USB_SPEED_SUPER:
+ dev->in_ctx->slot.dev_info |= (u32) udev->route;
+ dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_SS;
+ break;
+ case USB_SPEED_HIGH:
+ dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_HS;
+ break;
+ case USB_SPEED_FULL:
+ dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_FS;
+ break;
+ case USB_SPEED_LOW:
+ dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_LS;
+ break;
+ case USB_SPEED_VARIABLE:
+ xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
+ return -EINVAL;
+ break;
+ default:
+ /* Speed was set earlier, this shouldn't happen. */
+ BUG();
+ }
+ /* Find the root hub port this device is under */
+ for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
+ top_dev = top_dev->parent)
+ /* Found device below root hub */;
+ dev->in_ctx->slot.dev_info2 |= (u32) ROOT_HUB_PORT(top_dev->portnum);
+ xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum);
+
+ /* Is this a LS/FS device under a HS hub? */
+ /*
+ * FIXME: I don't think this is right, where does the TT info for the
+ * roothub or parent hub come from?
+ */
+ if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) &&
+ udev->tt) {
+ dev->in_ctx->slot.tt_info = udev->tt->hub->slot_id;
+ dev->in_ctx->slot.tt_info |= udev->ttport << 8;
+ }
+ xhci_dbg(xhci, "udev->tt = 0x%x\n", (unsigned int) udev->tt);
+ xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport);
+
+ /* Step 4 - ring already allocated */
+ /* Step 5 */
+ ep0_ctx->ep_info2 = EP_TYPE(CTRL_EP);
+ /*
+ * See section 4.3 bullet 6:
+ * The default Max Packet size for ep0 is "8 bytes for a USB2
+ * LS/FS/HS device or 512 bytes for a USB3 SS device"
+ * XXX: Not sure about wireless USB devices.
+ */
+ if (udev->speed == USB_SPEED_SUPER)
+ ep0_ctx->ep_info2 |= MAX_PACKET(512);
+ else
+ ep0_ctx->ep_info2 |= MAX_PACKET(8);
+ /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */
+ ep0_ctx->ep_info2 |= MAX_BURST(0);
+ ep0_ctx->ep_info2 |= ERROR_COUNT(3);
+
+ ep0_ctx->deq[0] =
+ dev->ep_rings[0]->first_seg->dma;
+ ep0_ctx->deq[0] |= dev->ep_rings[0]->cycle_state;
+ ep0_ctx->deq[1] = 0;
+
+ /* Steps 7 and 8 were done in xhci_alloc_virt_device() */
+
+ return 0;
+}
+
void xhci_mem_cleanup(struct xhci_hcd *xhci)
{
struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
int size;
-
- /* XXX: Free all the segments in the various rings */
+ int i;
/* Free the Event Ring Segment Table and the actual Event Ring */
xhci_writel(xhci, 0, &xhci->ir_set->erst_size);
@@ -218,16 +393,27 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
xhci_ring_free(xhci, xhci->cmd_ring);
xhci->cmd_ring = NULL;
xhci_dbg(xhci, "Freed command ring\n");
+
+ for (i = 1; i < MAX_HC_SLOTS; ++i)
+ xhci_free_virt_device(xhci, i);
+
if (xhci->segment_pool)
dma_pool_destroy(xhci->segment_pool);
xhci->segment_pool = NULL;
xhci_dbg(xhci, "Freed segment pool\n");
+
+ if (xhci->device_pool)
+ dma_pool_destroy(xhci->device_pool);
+ xhci->device_pool = NULL;
+ xhci_dbg(xhci, "Freed device context pool\n");
+
xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[1]);
xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[0]);
if (xhci->dcbaa)
pci_free_consistent(pdev, sizeof(*xhci->dcbaa),
xhci->dcbaa, xhci->dcbaa->dma);
xhci->dcbaa = NULL;
+
xhci->page_size = 0;
xhci->page_shift = 0;
}
@@ -280,8 +466,8 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
goto fail;
memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa));
xhci->dcbaa->dma = dma;
- xhci_dbg(xhci, "// Setting device context base array address to 0x%x\n",
- xhci->dcbaa->dma);
+ xhci_dbg(xhci, "// Device context base array address = 0x%x (DMA), 0x%x (virt)\n",
+ xhci->dcbaa->dma, (unsigned int) xhci->dcbaa);
xhci_writel(xhci, (u32) 0, &xhci->op_regs->dcbaa_ptr[1]);
xhci_writel(xhci, dma, &xhci->op_regs->dcbaa_ptr[0]);
@@ -293,7 +479,12 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
*/
xhci->segment_pool = dma_pool_create("xHCI ring segments", dev,
SEGMENT_SIZE, 64, xhci->page_size);
- if (!xhci->segment_pool)
+ /* See Table 46 and Note on Figure 55 */
+ /* FIXME support 64-byte contexts */
+ xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev,
+ sizeof(struct xhci_device_control),
+ 64, xhci->page_size);
+ if (!xhci->segment_pool || !xhci->device_pool)
goto fail;
/* Set up the command ring to have one segments for now. */
@@ -385,6 +576,9 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
* something other than the default (~1ms minimum between interrupts).
* See section 5.5.1.2.
*/
+ init_completion(&xhci->addr_dev);
+ for (i = 0; i < MAX_HC_SLOTS; ++i)
+ xhci->devs[i] = 0;
return 0;
fail:
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 005c5b2..7ac12b4 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -109,6 +109,13 @@ static const struct hc_driver xhci_pci_hc_driver = {
.shutdown = xhci_shutdown,
/*
+ * managing i/o requests and associated device resources
+ */
+ .alloc_dev = xhci_alloc_dev,
+ .free_dev = xhci_free_dev,
+ .address_device = xhci_address_device,
+
+ /*
* scheduling support
*/
.get_frame_number = xhci_get_frame,
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9d6bb3d..901ce70 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -252,13 +252,10 @@ void ring_cmd_db(struct xhci_hcd *xhci)
static void handle_cmd_completion(struct xhci_hcd *xhci,
struct xhci_event_cmd *event)
{
+ int slot_id = TRB_TO_SLOT_ID(event->flags);
u64 cmd_dma;
dma_addr_t cmd_dequeue_dma;
- /* Check completion code */
- if (GET_COMP_CODE(event->status) != COMP_SUCCESS)
- xhci_dbg(xhci, "WARN: unsuccessful no-op command\n");
-
cmd_dma = (((u64) event->cmd_trb[1]) << 32) + event->cmd_trb[0];
cmd_dequeue_dma = trb_virt_to_dma(xhci->cmd_ring->deq_seg,
xhci->cmd_ring->dequeue);
@@ -273,6 +270,21 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
return;
}
switch (xhci->cmd_ring->dequeue->generic.field[3] & TRB_TYPE_BITMASK) {
+ case TRB_TYPE(TRB_ENABLE_SLOT):
+ if (GET_COMP_CODE(event->status) == COMP_SUCCESS)
+ xhci->slot_id = slot_id;
+ else
+ xhci->slot_id = 0;
+ complete(&xhci->addr_dev);
+ break;
+ case TRB_TYPE(TRB_DISABLE_SLOT):
+ if (xhci->devs[slot_id])
+ xhci_free_virt_device(xhci, slot_id);
+ break;
+ case TRB_TYPE(TRB_ADDR_DEV):
+ xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(event->status);
+ complete(&xhci->addr_dev);
+ break;
case TRB_TYPE(TRB_CMD_NOOP):
++xhci->noops_handled;
break;
@@ -400,3 +412,17 @@ void *setup_one_noop(struct xhci_hcd *xhci)
xhci->noops_submitted++;
return ring_cmd_db;
}
+
+/* Queue a slot enable or disable request on the command ring */
+int queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id)
+{
+ return queue_command(xhci, 0, 0, 0,
+ TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id));
+}
+
+/* Queue an address device command TRB */
+int queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, u32 slot_id)
+{
+ return queue_command(xhci, in_ctx_ptr, 0, 0,
+ TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id));
+}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 059c659..4ef6b9e 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -285,12 +285,21 @@ struct xhci_op_regs {
* 4 - super speed
* 5-15 reserved
*/
-#define DEV_SPEED_MASK (0xf<<10)
+#define DEV_SPEED_MASK (0xf << 10)
+#define XDEV_FS (0x1 << 10)
+#define XDEV_LS (0x2 << 10)
+#define XDEV_HS (0x3 << 10)
+#define XDEV_SS (0x4 << 10)
#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
-#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == (0x1<<10))
-#define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == (0x2<<10))
-#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == (0x3<<10))
-#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == (0x4<<10))
+#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
+#define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
+#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
+#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
+/* Bits 20:23 in the Slot Context are the speed for the device */
+#define SLOT_SPEED_FS (XDEV_FS << 10)
+#define SLOT_SPEED_LS (XDEV_LS << 10)
+#define SLOT_SPEED_HS (XDEV_HS << 10)
+#define SLOT_SPEED_SS (XDEV_SS << 10)
/* Port Indicator Control */
#define PORT_LED_OFF (0 << 14)
#define PORT_LED_AMBER (1 << 14)
@@ -471,14 +480,19 @@ struct xhci_slot_ctx {
/* Set if the device is a hub - bit 26 */
#define DEV_HUB (0x1 << 26)
/* Index of the last valid endpoint context in this device context - 27:31 */
-#define LAST_EP_MASK (0x1f << 27)
-#define LAST_EP(p) ((p) << 27)
+#define LAST_CTX_MASK (0x1f << 27)
+#define LAST_CTX(p) ((p) << 27)
+#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
+/* Plus one for the slot context flag */
+#define EPI_TO_FLAG(p) (1 << ((p) + 1))
+#define SLOT_FLAG (1 << 0)
+#define EP0_FLAG (1 << 1)
/* dev_info2 bitmasks */
/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
#define MAX_EXIT (0xffff)
/* Root hub port number that is needed to access the USB device */
-#define ROOT_HUB_PORT (0xff << 16)
+#define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
/* tt_info bitmasks */
/*
@@ -495,7 +509,7 @@ struct xhci_slot_ctx {
/* dev_state bitmasks */
/* USB device address - assigned by the HC */
-#define DEV_ADDR (0xff)
+#define DEV_ADDR_MASK (0xff)
/* bits 8:26 reserved */
/* Slot state */
#define SLOT_STATE (0x1f << 27)
@@ -507,12 +521,13 @@ struct xhci_slot_ctx {
* @ep_info2: information on endpoint type, max packet size, max burst size,
* error count, and whether the HC will force an event for all
* transactions.
- * @ep_ring: 64-bit ring address. If the endpoint only defines one flow,
- * this points to the endpoint transfer ring. Otherwise, it points
- * to a flow context array, which has a ring pointer for each flow.
- * @intr_target:
- * 64-bit address of the Interrupter Target that will receive
- * events from this endpoint.
+ * @deq: 64-bit ring dequeue pointer address. If the endpoint only
+ * defines one stream, this points to the endpoint transfer ring.
+ * Otherwise, it points to a stream context array, which has a
+ * ring pointer for each flow.
+ * @tx_info:
+ * Average TRB lengths for the endpoint ring and
+ * max payload within an Endpoint Service Interval Time (ESIT).
*
* Endpoint Context - section 6.2.1.2. This assumes the HC uses 32-byte context
* structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
@@ -521,12 +536,10 @@ struct xhci_slot_ctx {
struct xhci_ep_ctx {
u32 ep_info;
u32 ep_info2;
- /* 64-bit endpoint ring address */
- u32 ep_ring[2];
- /* 64-bit address of the interrupter target */
- u32 intr_target[2];
+ u32 deq[2];
+ u32 tx_info;
/* offset 0x14 - 0x1f reserved for HC internal use */
- u32 reserved[2];
+ u32 reserved[3];
} __attribute__ ((packed));
/* ep_info bitmasks */
@@ -589,6 +602,28 @@ struct xhci_device_control {
#define ADD_EP(x) (0x1 << x)
+struct xhci_virt_device {
+ /*
+ * Commands to the hardware are passed an "input context" that
+ * tells the hardware what to change in its data structures.
+ * The hardware will return changes in an "output context" that
+ * software must allocate for the hardware. We need to keep
+ * track of input and output contexts separately because
+ * these commands might fail and we don't trust the hardware.
+ */
+ struct xhci_device_control *out_ctx;
+ dma_addr_t out_ctx_dma;
+ /* Used for addressing devices and configuration changes */
+ struct xhci_device_control *in_ctx;
+ dma_addr_t in_ctx_dma;
+ /* FIXME when stream support is added */
+ struct xhci_ring *ep_rings[31];
+ dma_addr_t ep_dma[31];
+ /* Status of the last command issued for this device */
+ u32 cmd_status;
+};
+
+
/**
* struct xhci_device_context_array
* @dev_context_ptr array of 64-bit DMA addresses for device contexts
@@ -711,6 +746,11 @@ struct xhci_event_cmd {
u32 flags;
} __attribute__ ((packed));
+/* flags bitmasks */
+/* bits 16:23 are the virtual function ID */
+/* bits 24:31 are the slot ID */
+#define TRB_TO_SLOT_ID(p) (((p) & (0xff<<24)) >> 24)
+#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
/* Port Status Change Event TRB fields */
/* Port ID - bits 31:24 */
@@ -931,6 +971,11 @@ struct xhci_hcd {
struct xhci_ring *cmd_ring;
struct xhci_ring *event_ring;
struct xhci_erst erst;
+ /* slot enabling and address device helpers */
+ struct completion addr_dev;
+ int slot_id;
+ /* Internal mirror of the HW's dcbaa */
+ struct xhci_virt_device *devs[MAX_HC_SLOTS];
/* DMA pools */
struct dma_pool *device_pool;
@@ -1002,10 +1047,14 @@ void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring);
void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst);
void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci);
void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
+void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep);
/* xHCI memory managment */
void xhci_mem_cleanup(struct xhci_hcd *xhci);
int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
+void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id);
+int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags);
+int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev);
#ifdef CONFIG_PCI
/* xHCI PCI glue */
@@ -1022,6 +1071,9 @@ void xhci_stop(struct usb_hcd *hcd);
void xhci_shutdown(struct usb_hcd *hcd);
int xhci_get_frame(struct usb_hcd *hcd);
irqreturn_t xhci_irq(struct usb_hcd *hcd);
+int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev);
+void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
/* xHCI ring, segment, TRB, and TD functions */
dma_addr_t trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
@@ -1029,6 +1081,8 @@ void ring_cmd_db(struct xhci_hcd *xhci);
void *setup_one_noop(struct xhci_hcd *xhci);
void handle_event(struct xhci_hcd *xhci);
void set_hc_event_deq(struct xhci_hcd *xhci);
+int queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id);
+int queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, u32 slot_id);
/* xHCI roothub code */
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
--
1.5.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
