Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933279Ab3D3TGh (ORCPT ); Tue, 30 Apr 2013 15:06:37 -0400 Received: from smtp-outbound-2.vmware.com ([208.91.2.13]:60930 "EHLO smtp-outbound-2.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932467Ab3D3TGd (ORCPT ); Tue, 30 Apr 2013 15:06:33 -0400 X-Greylist: delayed 544 seconds by postgrey-1.27 at vger.kernel.org; Tue, 30 Apr 2013 15:06:33 EDT From: Reilly Grant To: linux-kernel@vger.kernel.org Cc: Sarah Sharp , Greg Kroah-Hartman , linux-usb@vger.kernel.org, Reilly Grant Subject: [PATCH] xhci: Compute last_ctx from complete set of endpoints. Date: Tue, 30 Apr 2013 11:56:44 -0700 Message-Id: <1367348204-1997-1-git-send-email-grantr@vmware.com> X-Mailer: git-send-email 1.8.1.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5566 Lines: 139 The context entries field of the slot context must be set to one more than the highest endpoint index currently active. The previous logic only included the set of endpoints currently being added, meaning that if an endpoint where dropped then the field would be reset to 1, deactivating all configured endpoints. The xHCI spec is decidedly unclear on whether this field includes all configured endpoints or only those being modified by a configure endpoint command. My interpretation is the former and is the behavior observed in the Apple's xHCI driver. Signed-off-by: Reilly Grant --- drivers/usb/host/xhci.c | 52 +++++++++++++++++-------------------------------- 1 file changed, 18 insertions(+), 34 deletions(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 53b8f89..5c40d3e 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1557,12 +1557,10 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_hcd *xhci; struct xhci_container_ctx *in_ctx, *out_ctx; struct xhci_input_control_ctx *ctrl_ctx; - struct xhci_slot_ctx *slot_ctx; - unsigned int last_ctx; unsigned int ep_index; struct xhci_ep_ctx *ep_ctx; u32 drop_flag; - u32 new_add_flags, new_drop_flags, new_slot_info; + u32 new_add_flags, new_drop_flags; int ret; ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); @@ -1603,24 +1601,13 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag); new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); - last_ctx = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags)); - slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); - /* Update the last valid endpoint context, if we deleted the last one */ - if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) > - LAST_CTX(last_ctx)) { - slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); - slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); - } - new_slot_info = le32_to_cpu(slot_ctx->dev_info); - xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); - xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", + xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n", (unsigned int) ep->desc.bEndpointAddress, udev->slot_id, (unsigned int) new_drop_flags, - (unsigned int) new_add_flags, - (unsigned int) new_slot_info); + (unsigned int) new_add_flags); return 0; } @@ -1643,11 +1630,9 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct xhci_hcd *xhci; struct xhci_container_ctx *in_ctx, *out_ctx; unsigned int ep_index; - struct xhci_slot_ctx *slot_ctx; struct xhci_input_control_ctx *ctrl_ctx; u32 added_ctxs; - unsigned int last_ctx; - u32 new_add_flags, new_drop_flags, new_slot_info; + u32 new_add_flags, new_drop_flags; struct xhci_virt_device *virt_dev; int ret = 0; @@ -1662,7 +1647,6 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, return -ENODEV; added_ctxs = xhci_get_endpoint_flag(&ep->desc); - last_ctx = xhci_last_valid_endpoint(added_ctxs); if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { /* FIXME when we have to issue an evaluate endpoint command to * deal with ep0 max packet size changing once we get the @@ -1723,24 +1707,14 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, */ new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); - slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); - /* Update the last valid endpoint context, if we just added one past */ - if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) < - LAST_CTX(last_ctx)) { - slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); - slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); - } - new_slot_info = le32_to_cpu(slot_ctx->dev_info); - /* Store the usb_device pointer for later use */ ep->hcpriv = udev; - xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", + xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n", (unsigned int) ep->desc.bEndpointAddress, udev->slot_id, (unsigned int) new_drop_flags, - (unsigned int) new_add_flags, - (unsigned int) new_slot_info); + (unsigned int) new_add_flags); return 0; } @@ -2684,10 +2658,20 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) ctrl_ctx->drop_flags == 0) return 0; - xhci_dbg(xhci, "New Input Control Context:\n"); + /* Update the last valid endpoint context. */ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); + for (i = ARRAY_SIZE(virt_dev->eps) - 1; i >= 0; --i) { + if ((virt_dev->eps[i].ring && + !(le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1)))) || + (le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) + break; + } + slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); + slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(i + 1)); + + xhci_dbg(xhci, "New Input Control Context:\n"); xhci_dbg_ctx(xhci, virt_dev->in_ctx, - LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); + xhci_last_valid_endpoint(ctrl_ctx->add_flags)); ret = xhci_configure_endpoint(xhci, udev, NULL, false, false); -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/