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authorJacob Pan <jacob.jun.pan@intel.com>2010-12-09 10:37:42 +0000
committerAlan Cox <alan@linux.intel.com>2010-12-09 10:37:42 +0000
commitf26ab70974967a94eaac9390dc65bb5836a98ee6 (patch)
tree8d80ad1a6cec03e58c36ee4b1f4709ff7715fe0a /include
parent6be72e9b54479e7a2c473bc6cc778319e5f925e3 (diff)
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ehci: Support Intel Moorestown EHCI controller SRAM QH/QTD/ITD/SITD pool caching
The Intel Moorestown platform has MPH and OTG EHCI controllers that have internal SRAM that could be used as descriptors DMA pool caching. The SRAM is exposed via PCI BAR1. The limitation here is the SRAM access should be 32bit aligned. A separate patch "EHCI: Make ehci_qh structure items all 32bit aligned" has been submitted to linux-usb mailling list. Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com> Signed-off-by: Alek Du <alek.du@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/usb/hcd.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 57098cd8476..08a8fedfc7e 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -119,6 +119,8 @@ struct usb_hcd {
unsigned wireless:1; /* Wireless USB HCD */
unsigned authorized_default:1;
unsigned has_tt:1; /* Integrated TT in root hub */
+ unsigned has_sram:1; /* Local SRAM for caching */
+ unsigned sram_no_payload:1; /* sram not for payload */
int irq; /* irq allocated */
void __iomem *regs; /* device memory/io */