From: "Sean Rhodes" <sean@starlabs.systems>
To: devel@edk2.groups.io
Cc: Matt DeVillier <matt.devillier@gmail.com>,
Hao A Wu <hao.a.wu@intel.com>, Ray Ni <ray.ni@intel.com>,
Sean Rhodes <sean@starlabs.systems>
Subject: [PATCH 2/4] MdeModulePkg/XhciDxe/Xhci: Don't check for invalid PSIV
Date: Mon, 5 Dec 2022 09:18:25 +0000 [thread overview]
Message-ID: <f392c5111e7a0815a5c1bc66d7da041cf429f61b.1670231907.git.sean@starlabs.systems> (raw)
In-Reply-To: <ebfe14109801a3ec711bffd8db374299a39cc538.1670231907.git.sean@starlabs.systems>
From: Matt DeVillier <matt.devillier@gmail.com>
PSID matching relies on comparing the PSIV against the PortSpeed
value. This patch stops edk2 from checking for a PSIV of 0, as it
is not valid; this reduces the number of register access by
approximately 6 per second.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Change-Id: If15c55ab66d2e7faa832ce8576d2e5b47157cc9a
---
MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c | 44 ++++++++++++++++-------------
1 file changed, 25 insertions(+), 19 deletions(-)
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
index c05431ff30..62535cad54 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
@@ -371,6 +371,7 @@ XhcGetRootHubPortStatus (
UINT32 TotalPort;
UINTN Index;
UINTN MapSize;
+ UINT8 PortSpeed;
EFI_STATUS Status;
USB_DEV_ROUTE ParentRouteChart;
EFI_TPL OldTpl;
@@ -397,32 +398,37 @@ XhcGetRootHubPortStatus (
State = XhcReadOpReg (Xhc, Offset);
+ PortSpeed = (State & XHC_PORTSC_PS) >> 10;
+
//
// According to XHCI 1.1 spec November 2017,
// Section 7.2 xHCI Support Protocol Capability
//
- PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, ((State & XHC_PORTSC_PS) >> 10));
- if (PortStatus->PortStatus == 0) {
- //
- // According to XHCI 1.1 spec November 2017,
- // bit 10~13 of the root port status register identifies the speed of the attached device.
- //
- switch ((State & XHC_PORTSC_PS) >> 10) {
- case 2:
- PortStatus->PortStatus |= USB_PORT_STAT_LOW_SPEED;
- break;
+ if (PortSpeed > 0) {
+ PortStatus->PortStatus = XhcCheckUsbPortSpeedUsedPsic (Xhc, PortSpeed);
+ // If no match found in ext cap reg, fall back to PORTSC
+ if (PortStatus->PortStatus == 0) {
+ //
+ // According to XHCI 1.1 spec November 2017,
+ // bit 10~13 of the root port status register identifies the speed of the attached device.
+ //
+ switch (PortSpeed) {
+ case 2:
+ PortStatus->PortStatus |= USB_PORT_STAT_LOW_SPEED;
+ break;
- case 3:
- PortStatus->PortStatus |= USB_PORT_STAT_HIGH_SPEED;
- break;
+ case 3:
+ PortStatus->PortStatus |= USB_PORT_STAT_HIGH_SPEED;
+ break;
- case 4:
- case 5:
- PortStatus->PortStatus |= USB_PORT_STAT_SUPER_SPEED;
- break;
+ case 4:
+ case 5:
+ PortStatus->PortStatus |= USB_PORT_STAT_SUPER_SPEED;
+ break;
- default:
- break;
+ default:
+ break;
+ }
}
}
--
2.37.2
next prev parent reply other threads:[~2022-12-05 9:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 9:18 [PATCH 1/4] MdeModulePkg/XhciDxe/XhciReg: Handle incorrect PSIV indices Sean Rhodes
2022-12-05 9:18 ` Sean Rhodes [this message]
2022-12-05 9:18 ` [PATCH 3/4] MdeModulePkg/BmBoot: Skip removable media if it is not present Sean Rhodes
2022-12-07 2:23 ` [edk2-devel] " Wu, Hao A
2022-12-05 9:18 ` [PATCH 4/4] MdeModulePkg/UsbBusDxe: Adjust the MaxPacketLength to real world values Sean Rhodes
2022-12-07 2:23 ` [edk2-devel] " Wu, Hao A
[not found] ` <172DDB13FC08F1B6.13790@groups.io>
2022-12-05 9:19 ` Sean Rhodes
2022-12-08 7:06 ` [edk2-devel] [PATCH 1/4] MdeModulePkg/XhciDxe/XhciReg: Handle incorrect PSIV indices ian.chiu
2022-12-09 20:45 ` Sean Rhodes
-- strict thread matches above, loose matches on Subject: below --
2022-12-01 20:24 Sean Rhodes
2022-12-01 20:24 ` [PATCH 2/4] MdeModulePkg/XhciDxe/Xhci: Don't check for invalid PSIV Sean Rhodes
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