The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 2a865a652299f5666f3b785cbe758c5f57453036 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023072143-ethically-doable-6e0d@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..
Possible dependencies:
2a865a652299 ("xhci: Fix TRB prefetch issue of ZHAOXIN hosts") f927728186f0 ("xhci: Fix resume issue of some ZHAOXIN hosts") a611bf473d1f ("xhci-pci: Set runtime PM as default policy on all xHC 1.2 or later devices") 34cd2db408d5 ("xhci: Add quirk to reset host back to default state at shutdown") a956f91247da ("Merge 6.0-rc4 into usb-next")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 2a865a652299f5666f3b785cbe758c5f57453036 Mon Sep 17 00:00:00 2001 From: Weitao Wang WeitaoWang-oc@zhaoxin.com Date: Fri, 2 Jun 2023 17:40:07 +0300 Subject: [PATCH] xhci: Fix TRB prefetch issue of ZHAOXIN hosts
On some ZHAOXIN hosts, xHCI will prefetch TRB for performance improvement. However this TRB prefetch mechanism may cross page boundary, which may access memory not allocated by xHCI driver. In order to fix this issue, two pages was allocated for a segment and only the first page will be used. And add a quirk XHCI_ZHAOXIN_TRB_FETCH for this issue.
Cc: stable@vger.kernel.org Signed-off-by: Weitao Wang WeitaoWang-oc@zhaoxin.com Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Message-ID: 20230602144009.1225632-10-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index a8e9a4bb1537..c4170421bc9c 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2345,8 +2345,12 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) * and our use of dma addresses in the trb_address_map radix tree needs * TRB_SEGMENT_SIZE alignment, so we pick the greater alignment need. */ - xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, - TRB_SEGMENT_SIZE, TRB_SEGMENT_SIZE, xhci->page_size); + if (xhci->quirks & XHCI_ZHAOXIN_TRB_FETCH) + xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, + TRB_SEGMENT_SIZE * 2, TRB_SEGMENT_SIZE * 2, xhci->page_size * 2); + else + xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, + TRB_SEGMENT_SIZE, TRB_SEGMENT_SIZE, xhci->page_size);
/* See Table 46 and Note on Figure 55 */ xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev, diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 2103c6c0a967..3aad946bab68 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -522,8 +522,13 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) xhci->quirks |= XHCI_NO_SOFT_RETRY;
if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) { - if (pdev->device == 0x9202) + if (pdev->device == 0x9202) { xhci->quirks |= XHCI_RESET_ON_RESUME; + xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH; + } + + if (pdev->device == 0x9203) + xhci->quirks |= XHCI_ZHAOXIN_TRB_FETCH; }
/* xHC spec requires PCI devices to support D3hot and D3cold */ diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 456e1c8ca005..5a495126c8ba 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1904,6 +1904,7 @@ struct xhci_hcd { #define XHCI_EP_CTX_BROKEN_DCS BIT_ULL(42) #define XHCI_SUSPEND_RESUME_CLKS BIT_ULL(43) #define XHCI_RESET_TO_DEFAULT BIT_ULL(44) +#define XHCI_ZHAOXIN_TRB_FETCH BIT_ULL(45)
unsigned int num_active_eps; unsigned int limit_active_eps;